6533 lines
197 KiB
C
6533 lines
197 KiB
C
/*
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* Copyright (c) 2000-2006 Silicon Graphics, Inc.
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* All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "xfs.h"
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#include "xfs_fs.h"
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#include "xfs_types.h"
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#include "xfs_bit.h"
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#include "xfs_log.h"
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#include "xfs_inum.h"
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#include "xfs_trans.h"
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#include "xfs_sb.h"
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#include "xfs_ag.h"
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#include "xfs_dir2.h"
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#include "xfs_da_btree.h"
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#include "xfs_bmap_btree.h"
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#include "xfs_alloc_btree.h"
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#include "xfs_ialloc_btree.h"
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#include "xfs_dir2_sf.h"
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#include "xfs_attr_sf.h"
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#include "xfs_dinode.h"
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#include "xfs_inode.h"
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#include "xfs_btree.h"
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#include "xfs_dmapi.h"
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#include "xfs_mount.h"
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#include "xfs_ialloc.h"
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#include "xfs_itable.h"
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#include "xfs_dir2_data.h"
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#include "xfs_dir2_leaf.h"
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#include "xfs_dir2_block.h"
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#include "xfs_inode_item.h"
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#include "xfs_extfree_item.h"
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#include "xfs_alloc.h"
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#include "xfs_bmap.h"
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#include "xfs_rtalloc.h"
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#include "xfs_error.h"
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#include "xfs_attr_leaf.h"
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#include "xfs_rw.h"
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#include "xfs_quota.h"
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#include "xfs_trans_space.h"
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#include "xfs_buf_item.h"
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#ifdef DEBUG
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STATIC void
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xfs_bmap_check_leaf_extents(xfs_btree_cur_t *cur, xfs_inode_t *ip, int whichfork);
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#endif
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kmem_zone_t *xfs_bmap_free_item_zone;
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/*
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* Prototypes for internal bmap routines.
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*/
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/*
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* Called from xfs_bmap_add_attrfork to handle extents format files.
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*/
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STATIC int /* error */
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xfs_bmap_add_attrfork_extents(
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xfs_trans_t *tp, /* transaction pointer */
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xfs_inode_t *ip, /* incore inode pointer */
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xfs_fsblock_t *firstblock, /* first block allocated */
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xfs_bmap_free_t *flist, /* blocks to free at commit */
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int *flags); /* inode logging flags */
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/*
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* Called from xfs_bmap_add_attrfork to handle local format files.
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*/
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STATIC int /* error */
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xfs_bmap_add_attrfork_local(
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xfs_trans_t *tp, /* transaction pointer */
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xfs_inode_t *ip, /* incore inode pointer */
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xfs_fsblock_t *firstblock, /* first block allocated */
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xfs_bmap_free_t *flist, /* blocks to free at commit */
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int *flags); /* inode logging flags */
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/*
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* Called by xfs_bmapi to update file extent records and the btree
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* after allocating space (or doing a delayed allocation).
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*/
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STATIC int /* error */
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xfs_bmap_add_extent(
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xfs_inode_t *ip, /* incore inode pointer */
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xfs_extnum_t idx, /* extent number to update/insert */
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xfs_btree_cur_t **curp, /* if *curp is null, not a btree */
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xfs_bmbt_irec_t *new, /* new data to add to file extents */
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xfs_fsblock_t *first, /* pointer to firstblock variable */
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xfs_bmap_free_t *flist, /* list of extents to be freed */
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int *logflagsp, /* inode logging flags */
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xfs_extdelta_t *delta, /* Change made to incore extents */
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int whichfork, /* data or attr fork */
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int rsvd); /* OK to allocate reserved blocks */
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/*
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* Called by xfs_bmap_add_extent to handle cases converting a delayed
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* allocation to a real allocation.
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*/
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STATIC int /* error */
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xfs_bmap_add_extent_delay_real(
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xfs_inode_t *ip, /* incore inode pointer */
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xfs_extnum_t idx, /* extent number to update/insert */
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xfs_btree_cur_t **curp, /* if *curp is null, not a btree */
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xfs_bmbt_irec_t *new, /* new data to add to file extents */
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xfs_filblks_t *dnew, /* new delayed-alloc indirect blocks */
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xfs_fsblock_t *first, /* pointer to firstblock variable */
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xfs_bmap_free_t *flist, /* list of extents to be freed */
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int *logflagsp, /* inode logging flags */
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xfs_extdelta_t *delta, /* Change made to incore extents */
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int rsvd); /* OK to allocate reserved blocks */
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/*
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* Called by xfs_bmap_add_extent to handle cases converting a hole
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* to a delayed allocation.
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*/
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STATIC int /* error */
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xfs_bmap_add_extent_hole_delay(
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xfs_inode_t *ip, /* incore inode pointer */
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xfs_extnum_t idx, /* extent number to update/insert */
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xfs_btree_cur_t *cur, /* if null, not a btree */
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xfs_bmbt_irec_t *new, /* new data to add to file extents */
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int *logflagsp,/* inode logging flags */
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xfs_extdelta_t *delta, /* Change made to incore extents */
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int rsvd); /* OK to allocate reserved blocks */
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/*
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* Called by xfs_bmap_add_extent to handle cases converting a hole
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* to a real allocation.
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*/
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STATIC int /* error */
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xfs_bmap_add_extent_hole_real(
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xfs_inode_t *ip, /* incore inode pointer */
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xfs_extnum_t idx, /* extent number to update/insert */
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xfs_btree_cur_t *cur, /* if null, not a btree */
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xfs_bmbt_irec_t *new, /* new data to add to file extents */
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int *logflagsp, /* inode logging flags */
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xfs_extdelta_t *delta, /* Change made to incore extents */
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int whichfork); /* data or attr fork */
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/*
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* Called by xfs_bmap_add_extent to handle cases converting an unwritten
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* allocation to a real allocation or vice versa.
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*/
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STATIC int /* error */
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xfs_bmap_add_extent_unwritten_real(
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xfs_inode_t *ip, /* incore inode pointer */
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xfs_extnum_t idx, /* extent number to update/insert */
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xfs_btree_cur_t **curp, /* if *curp is null, not a btree */
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xfs_bmbt_irec_t *new, /* new data to add to file extents */
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int *logflagsp, /* inode logging flags */
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xfs_extdelta_t *delta); /* Change made to incore extents */
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/*
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* xfs_bmap_alloc is called by xfs_bmapi to allocate an extent for a file.
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* It figures out where to ask the underlying allocator to put the new extent.
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*/
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STATIC int /* error */
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xfs_bmap_alloc(
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xfs_bmalloca_t *ap); /* bmap alloc argument struct */
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/*
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* Transform a btree format file with only one leaf node, where the
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* extents list will fit in the inode, into an extents format file.
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* Since the file extents are already in-core, all we have to do is
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* give up the space for the btree root and pitch the leaf block.
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*/
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STATIC int /* error */
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xfs_bmap_btree_to_extents(
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xfs_trans_t *tp, /* transaction pointer */
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xfs_inode_t *ip, /* incore inode pointer */
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xfs_btree_cur_t *cur, /* btree cursor */
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int *logflagsp, /* inode logging flags */
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int whichfork); /* data or attr fork */
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#ifdef DEBUG
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/*
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* Check that the extents list for the inode ip is in the right order.
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*/
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STATIC void
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xfs_bmap_check_extents(
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xfs_inode_t *ip, /* incore inode pointer */
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int whichfork); /* data or attr fork */
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#endif
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/*
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* Called by xfs_bmapi to update file extent records and the btree
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* after removing space (or undoing a delayed allocation).
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*/
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STATIC int /* error */
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xfs_bmap_del_extent(
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xfs_inode_t *ip, /* incore inode pointer */
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xfs_trans_t *tp, /* current trans pointer */
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xfs_extnum_t idx, /* extent number to update/insert */
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xfs_bmap_free_t *flist, /* list of extents to be freed */
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xfs_btree_cur_t *cur, /* if null, not a btree */
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xfs_bmbt_irec_t *new, /* new data to add to file extents */
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int *logflagsp,/* inode logging flags */
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xfs_extdelta_t *delta, /* Change made to incore extents */
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int whichfork, /* data or attr fork */
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int rsvd); /* OK to allocate reserved blocks */
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/*
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* Remove the entry "free" from the free item list. Prev points to the
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* previous entry, unless "free" is the head of the list.
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*/
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STATIC void
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xfs_bmap_del_free(
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xfs_bmap_free_t *flist, /* free item list header */
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xfs_bmap_free_item_t *prev, /* previous item on list, if any */
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xfs_bmap_free_item_t *free); /* list item to be freed */
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/*
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* Convert an extents-format file into a btree-format file.
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* The new file will have a root block (in the inode) and a single child block.
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*/
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STATIC int /* error */
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xfs_bmap_extents_to_btree(
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xfs_trans_t *tp, /* transaction pointer */
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xfs_inode_t *ip, /* incore inode pointer */
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xfs_fsblock_t *firstblock, /* first-block-allocated */
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xfs_bmap_free_t *flist, /* blocks freed in xaction */
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xfs_btree_cur_t **curp, /* cursor returned to caller */
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int wasdel, /* converting a delayed alloc */
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int *logflagsp, /* inode logging flags */
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int whichfork); /* data or attr fork */
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/*
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* Convert a local file to an extents file.
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* This code is sort of bogus, since the file data needs to get
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* logged so it won't be lost. The bmap-level manipulations are ok, though.
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*/
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STATIC int /* error */
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xfs_bmap_local_to_extents(
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xfs_trans_t *tp, /* transaction pointer */
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xfs_inode_t *ip, /* incore inode pointer */
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xfs_fsblock_t *firstblock, /* first block allocated in xaction */
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xfs_extlen_t total, /* total blocks needed by transaction */
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int *logflagsp, /* inode logging flags */
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int whichfork); /* data or attr fork */
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/*
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* Search the extents list for the inode, for the extent containing bno.
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* If bno lies in a hole, point to the next entry. If bno lies past eof,
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* *eofp will be set, and *prevp will contain the last entry (null if none).
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* Else, *lastxp will be set to the index of the found
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* entry; *gotp will contain the entry.
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*/
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STATIC xfs_bmbt_rec_t * /* pointer to found extent entry */
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xfs_bmap_search_extents(
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xfs_inode_t *ip, /* incore inode pointer */
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xfs_fileoff_t bno, /* block number searched for */
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int whichfork, /* data or attr fork */
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int *eofp, /* out: end of file found */
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xfs_extnum_t *lastxp, /* out: last extent index */
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xfs_bmbt_irec_t *gotp, /* out: extent entry found */
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xfs_bmbt_irec_t *prevp); /* out: previous extent entry found */
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/*
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* Check the last inode extent to determine whether this allocation will result
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* in blocks being allocated at the end of the file. When we allocate new data
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* blocks at the end of the file which do not start at the previous data block,
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* we will try to align the new blocks at stripe unit boundaries.
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*/
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STATIC int /* error */
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xfs_bmap_isaeof(
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xfs_inode_t *ip, /* incore inode pointer */
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xfs_fileoff_t off, /* file offset in fsblocks */
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int whichfork, /* data or attribute fork */
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char *aeof); /* return value */
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#ifdef XFS_BMAP_TRACE
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/*
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* Add a bmap trace buffer entry. Base routine for the others.
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*/
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STATIC void
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xfs_bmap_trace_addentry(
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int opcode, /* operation */
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char *fname, /* function name */
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char *desc, /* operation description */
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xfs_inode_t *ip, /* incore inode pointer */
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xfs_extnum_t idx, /* index of entry(ies) */
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xfs_extnum_t cnt, /* count of entries, 1 or 2 */
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xfs_bmbt_rec_t *r1, /* first record */
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xfs_bmbt_rec_t *r2, /* second record or null */
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int whichfork); /* data or attr fork */
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/*
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* Add bmap trace entry prior to a call to xfs_iext_remove.
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*/
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STATIC void
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xfs_bmap_trace_delete(
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char *fname, /* function name */
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char *desc, /* operation description */
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xfs_inode_t *ip, /* incore inode pointer */
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xfs_extnum_t idx, /* index of entry(entries) deleted */
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xfs_extnum_t cnt, /* count of entries deleted, 1 or 2 */
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int whichfork); /* data or attr fork */
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/*
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* Add bmap trace entry prior to a call to xfs_iext_insert, or
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* reading in the extents list from the disk (in the btree).
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*/
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STATIC void
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xfs_bmap_trace_insert(
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char *fname, /* function name */
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char *desc, /* operation description */
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xfs_inode_t *ip, /* incore inode pointer */
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xfs_extnum_t idx, /* index of entry(entries) inserted */
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xfs_extnum_t cnt, /* count of entries inserted, 1 or 2 */
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xfs_bmbt_irec_t *r1, /* inserted record 1 */
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xfs_bmbt_irec_t *r2, /* inserted record 2 or null */
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int whichfork); /* data or attr fork */
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/*
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* Add bmap trace entry after updating an extent record in place.
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*/
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STATIC void
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xfs_bmap_trace_post_update(
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char *fname, /* function name */
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char *desc, /* operation description */
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xfs_inode_t *ip, /* incore inode pointer */
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xfs_extnum_t idx, /* index of entry updated */
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int whichfork); /* data or attr fork */
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/*
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* Add bmap trace entry prior to updating an extent record in place.
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*/
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STATIC void
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xfs_bmap_trace_pre_update(
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char *fname, /* function name */
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char *desc, /* operation description */
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xfs_inode_t *ip, /* incore inode pointer */
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xfs_extnum_t idx, /* index of entry to be updated */
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int whichfork); /* data or attr fork */
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#else
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#define xfs_bmap_trace_delete(f,d,ip,i,c,w)
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#define xfs_bmap_trace_insert(f,d,ip,i,c,r1,r2,w)
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#define xfs_bmap_trace_post_update(f,d,ip,i,w)
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#define xfs_bmap_trace_pre_update(f,d,ip,i,w)
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#endif /* XFS_BMAP_TRACE */
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/*
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* Compute the worst-case number of indirect blocks that will be used
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* for ip's delayed extent of length "len".
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*/
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STATIC xfs_filblks_t
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xfs_bmap_worst_indlen(
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xfs_inode_t *ip, /* incore inode pointer */
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xfs_filblks_t len); /* delayed extent length */
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#ifdef DEBUG
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/*
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* Perform various validation checks on the values being returned
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* from xfs_bmapi().
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*/
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STATIC void
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xfs_bmap_validate_ret(
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xfs_fileoff_t bno,
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xfs_filblks_t len,
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int flags,
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xfs_bmbt_irec_t *mval,
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int nmap,
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int ret_nmap);
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#else
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#define xfs_bmap_validate_ret(bno,len,flags,mval,onmap,nmap)
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#endif /* DEBUG */
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#if defined(XFS_RW_TRACE)
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STATIC void
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xfs_bunmap_trace(
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xfs_inode_t *ip,
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xfs_fileoff_t bno,
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xfs_filblks_t len,
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int flags,
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inst_t *ra);
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#else
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#define xfs_bunmap_trace(ip, bno, len, flags, ra)
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#endif /* XFS_RW_TRACE */
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|
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STATIC int
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xfs_bmap_count_tree(
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xfs_mount_t *mp,
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xfs_trans_t *tp,
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xfs_ifork_t *ifp,
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xfs_fsblock_t blockno,
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int levelin,
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int *count);
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|
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STATIC int
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xfs_bmap_count_leaves(
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xfs_ifork_t *ifp,
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xfs_extnum_t idx,
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int numrecs,
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int *count);
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|
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STATIC int
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xfs_bmap_disk_count_leaves(
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xfs_ifork_t *ifp,
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xfs_mount_t *mp,
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xfs_extnum_t idx,
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xfs_bmbt_block_t *block,
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int numrecs,
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int *count);
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|
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/*
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* Bmap internal routines.
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*/
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|
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/*
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* Called from xfs_bmap_add_attrfork to handle btree format files.
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*/
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STATIC int /* error */
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xfs_bmap_add_attrfork_btree(
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xfs_trans_t *tp, /* transaction pointer */
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xfs_inode_t *ip, /* incore inode pointer */
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xfs_fsblock_t *firstblock, /* first block allocated */
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xfs_bmap_free_t *flist, /* blocks to free at commit */
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int *flags) /* inode logging flags */
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{
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xfs_btree_cur_t *cur; /* btree cursor */
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int error; /* error return value */
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xfs_mount_t *mp; /* file system mount struct */
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int stat; /* newroot status */
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mp = ip->i_mount;
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if (ip->i_df.if_broot_bytes <= XFS_IFORK_DSIZE(ip))
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*flags |= XFS_ILOG_DBROOT;
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else {
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cur = xfs_btree_init_cursor(mp, tp, NULL, 0, XFS_BTNUM_BMAP, ip,
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XFS_DATA_FORK);
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cur->bc_private.b.flist = flist;
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cur->bc_private.b.firstblock = *firstblock;
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if ((error = xfs_bmbt_lookup_ge(cur, 0, 0, 0, &stat)))
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goto error0;
|
|
ASSERT(stat == 1); /* must be at least one entry */
|
|
if ((error = xfs_bmbt_newroot(cur, flags, &stat)))
|
|
goto error0;
|
|
if (stat == 0) {
|
|
xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR);
|
|
return XFS_ERROR(ENOSPC);
|
|
}
|
|
*firstblock = cur->bc_private.b.firstblock;
|
|
cur->bc_private.b.allocated = 0;
|
|
xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR);
|
|
}
|
|
return 0;
|
|
error0:
|
|
xfs_btree_del_cursor(cur, XFS_BTREE_ERROR);
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Called from xfs_bmap_add_attrfork to handle extents format files.
|
|
*/
|
|
STATIC int /* error */
|
|
xfs_bmap_add_attrfork_extents(
|
|
xfs_trans_t *tp, /* transaction pointer */
|
|
xfs_inode_t *ip, /* incore inode pointer */
|
|
xfs_fsblock_t *firstblock, /* first block allocated */
|
|
xfs_bmap_free_t *flist, /* blocks to free at commit */
|
|
int *flags) /* inode logging flags */
|
|
{
|
|
xfs_btree_cur_t *cur; /* bmap btree cursor */
|
|
int error; /* error return value */
|
|
|
|
if (ip->i_d.di_nextents * sizeof(xfs_bmbt_rec_t) <= XFS_IFORK_DSIZE(ip))
|
|
return 0;
|
|
cur = NULL;
|
|
error = xfs_bmap_extents_to_btree(tp, ip, firstblock, flist, &cur, 0,
|
|
flags, XFS_DATA_FORK);
|
|
if (cur) {
|
|
cur->bc_private.b.allocated = 0;
|
|
xfs_btree_del_cursor(cur,
|
|
error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR);
|
|
}
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Called from xfs_bmap_add_attrfork to handle local format files.
|
|
*/
|
|
STATIC int /* error */
|
|
xfs_bmap_add_attrfork_local(
|
|
xfs_trans_t *tp, /* transaction pointer */
|
|
xfs_inode_t *ip, /* incore inode pointer */
|
|
xfs_fsblock_t *firstblock, /* first block allocated */
|
|
xfs_bmap_free_t *flist, /* blocks to free at commit */
|
|
int *flags) /* inode logging flags */
|
|
{
|
|
xfs_da_args_t dargs; /* args for dir/attr code */
|
|
int error; /* error return value */
|
|
xfs_mount_t *mp; /* mount structure pointer */
|
|
|
|
if (ip->i_df.if_bytes <= XFS_IFORK_DSIZE(ip))
|
|
return 0;
|
|
if ((ip->i_d.di_mode & S_IFMT) == S_IFDIR) {
|
|
mp = ip->i_mount;
|
|
memset(&dargs, 0, sizeof(dargs));
|
|
dargs.dp = ip;
|
|
dargs.firstblock = firstblock;
|
|
dargs.flist = flist;
|
|
dargs.total = mp->m_dirblkfsbs;
|
|
dargs.whichfork = XFS_DATA_FORK;
|
|
dargs.trans = tp;
|
|
error = xfs_dir2_sf_to_block(&dargs);
|
|
} else
|
|
error = xfs_bmap_local_to_extents(tp, ip, firstblock, 1, flags,
|
|
XFS_DATA_FORK);
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Called by xfs_bmapi to update file extent records and the btree
|
|
* after allocating space (or doing a delayed allocation).
|
|
*/
|
|
STATIC int /* error */
|
|
xfs_bmap_add_extent(
|
|
xfs_inode_t *ip, /* incore inode pointer */
|
|
xfs_extnum_t idx, /* extent number to update/insert */
|
|
xfs_btree_cur_t **curp, /* if *curp is null, not a btree */
|
|
xfs_bmbt_irec_t *new, /* new data to add to file extents */
|
|
xfs_fsblock_t *first, /* pointer to firstblock variable */
|
|
xfs_bmap_free_t *flist, /* list of extents to be freed */
|
|
int *logflagsp, /* inode logging flags */
|
|
xfs_extdelta_t *delta, /* Change made to incore extents */
|
|
int whichfork, /* data or attr fork */
|
|
int rsvd) /* OK to use reserved data blocks */
|
|
{
|
|
xfs_btree_cur_t *cur; /* btree cursor or null */
|
|
xfs_filblks_t da_new; /* new count del alloc blocks used */
|
|
xfs_filblks_t da_old; /* old count del alloc blocks used */
|
|
int error; /* error return value */
|
|
#ifdef XFS_BMAP_TRACE
|
|
static char fname[] = "xfs_bmap_add_extent";
|
|
#endif
|
|
xfs_ifork_t *ifp; /* inode fork ptr */
|
|
int logflags; /* returned value */
|
|
xfs_extnum_t nextents; /* number of extents in file now */
|
|
|
|
XFS_STATS_INC(xs_add_exlist);
|
|
cur = *curp;
|
|
ifp = XFS_IFORK_PTR(ip, whichfork);
|
|
nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
|
|
ASSERT(idx <= nextents);
|
|
da_old = da_new = 0;
|
|
error = 0;
|
|
/*
|
|
* This is the first extent added to a new/empty file.
|
|
* Special case this one, so other routines get to assume there are
|
|
* already extents in the list.
|
|
*/
|
|
if (nextents == 0) {
|
|
xfs_bmap_trace_insert(fname, "insert empty", ip, 0, 1, new,
|
|
NULL, whichfork);
|
|
xfs_iext_insert(ifp, 0, 1, new);
|
|
ASSERT(cur == NULL);
|
|
ifp->if_lastex = 0;
|
|
if (!ISNULLSTARTBLOCK(new->br_startblock)) {
|
|
XFS_IFORK_NEXT_SET(ip, whichfork, 1);
|
|
logflags = XFS_ILOG_CORE | XFS_ILOG_FEXT(whichfork);
|
|
} else
|
|
logflags = 0;
|
|
/* DELTA: single new extent */
|
|
if (delta) {
|
|
if (delta->xed_startoff > new->br_startoff)
|
|
delta->xed_startoff = new->br_startoff;
|
|
if (delta->xed_blockcount <
|
|
new->br_startoff + new->br_blockcount)
|
|
delta->xed_blockcount = new->br_startoff +
|
|
new->br_blockcount;
|
|
}
|
|
}
|
|
/*
|
|
* Any kind of new delayed allocation goes here.
|
|
*/
|
|
else if (ISNULLSTARTBLOCK(new->br_startblock)) {
|
|
if (cur)
|
|
ASSERT((cur->bc_private.b.flags &
|
|
XFS_BTCUR_BPRV_WASDEL) == 0);
|
|
if ((error = xfs_bmap_add_extent_hole_delay(ip, idx, cur, new,
|
|
&logflags, delta, rsvd)))
|
|
goto done;
|
|
}
|
|
/*
|
|
* Real allocation off the end of the file.
|
|
*/
|
|
else if (idx == nextents) {
|
|
if (cur)
|
|
ASSERT((cur->bc_private.b.flags &
|
|
XFS_BTCUR_BPRV_WASDEL) == 0);
|
|
if ((error = xfs_bmap_add_extent_hole_real(ip, idx, cur, new,
|
|
&logflags, delta, whichfork)))
|
|
goto done;
|
|
} else {
|
|
xfs_bmbt_irec_t prev; /* old extent at offset idx */
|
|
|
|
/*
|
|
* Get the record referred to by idx.
|
|
*/
|
|
xfs_bmbt_get_all(xfs_iext_get_ext(ifp, idx), &prev);
|
|
/*
|
|
* If it's a real allocation record, and the new allocation ends
|
|
* after the start of the referred to record, then we're filling
|
|
* in a delayed or unwritten allocation with a real one, or
|
|
* converting real back to unwritten.
|
|
*/
|
|
if (!ISNULLSTARTBLOCK(new->br_startblock) &&
|
|
new->br_startoff + new->br_blockcount > prev.br_startoff) {
|
|
if (prev.br_state != XFS_EXT_UNWRITTEN &&
|
|
ISNULLSTARTBLOCK(prev.br_startblock)) {
|
|
da_old = STARTBLOCKVAL(prev.br_startblock);
|
|
if (cur)
|
|
ASSERT(cur->bc_private.b.flags &
|
|
XFS_BTCUR_BPRV_WASDEL);
|
|
if ((error = xfs_bmap_add_extent_delay_real(ip,
|
|
idx, &cur, new, &da_new, first, flist,
|
|
&logflags, delta, rsvd)))
|
|
goto done;
|
|
} else if (new->br_state == XFS_EXT_NORM) {
|
|
ASSERT(new->br_state == XFS_EXT_NORM);
|
|
if ((error = xfs_bmap_add_extent_unwritten_real(
|
|
ip, idx, &cur, new, &logflags, delta)))
|
|
goto done;
|
|
} else {
|
|
ASSERT(new->br_state == XFS_EXT_UNWRITTEN);
|
|
if ((error = xfs_bmap_add_extent_unwritten_real(
|
|
ip, idx, &cur, new, &logflags, delta)))
|
|
goto done;
|
|
}
|
|
ASSERT(*curp == cur || *curp == NULL);
|
|
}
|
|
/*
|
|
* Otherwise we're filling in a hole with an allocation.
|
|
*/
|
|
else {
|
|
if (cur)
|
|
ASSERT((cur->bc_private.b.flags &
|
|
XFS_BTCUR_BPRV_WASDEL) == 0);
|
|
if ((error = xfs_bmap_add_extent_hole_real(ip, idx, cur,
|
|
new, &logflags, delta, whichfork)))
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
ASSERT(*curp == cur || *curp == NULL);
|
|
/*
|
|
* Convert to a btree if necessary.
|
|
*/
|
|
if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS &&
|
|
XFS_IFORK_NEXTENTS(ip, whichfork) > ifp->if_ext_max) {
|
|
int tmp_logflags; /* partial log flag return val */
|
|
|
|
ASSERT(cur == NULL);
|
|
error = xfs_bmap_extents_to_btree(ip->i_transp, ip, first,
|
|
flist, &cur, da_old > 0, &tmp_logflags, whichfork);
|
|
logflags |= tmp_logflags;
|
|
if (error)
|
|
goto done;
|
|
}
|
|
/*
|
|
* Adjust for changes in reserved delayed indirect blocks.
|
|
* Nothing to do for disk quotas here.
|
|
*/
|
|
if (da_old || da_new) {
|
|
xfs_filblks_t nblks;
|
|
|
|
nblks = da_new;
|
|
if (cur)
|
|
nblks += cur->bc_private.b.allocated;
|
|
ASSERT(nblks <= da_old);
|
|
if (nblks < da_old)
|
|
xfs_mod_incore_sb(ip->i_mount, XFS_SBS_FDBLOCKS,
|
|
(int)(da_old - nblks), rsvd);
|
|
}
|
|
/*
|
|
* Clear out the allocated field, done with it now in any case.
|
|
*/
|
|
if (cur) {
|
|
cur->bc_private.b.allocated = 0;
|
|
*curp = cur;
|
|
}
|
|
done:
|
|
#ifdef DEBUG
|
|
if (!error)
|
|
xfs_bmap_check_leaf_extents(*curp, ip, whichfork);
|
|
#endif
|
|
*logflagsp = logflags;
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Called by xfs_bmap_add_extent to handle cases converting a delayed
|
|
* allocation to a real allocation.
|
|
*/
|
|
STATIC int /* error */
|
|
xfs_bmap_add_extent_delay_real(
|
|
xfs_inode_t *ip, /* incore inode pointer */
|
|
xfs_extnum_t idx, /* extent number to update/insert */
|
|
xfs_btree_cur_t **curp, /* if *curp is null, not a btree */
|
|
xfs_bmbt_irec_t *new, /* new data to add to file extents */
|
|
xfs_filblks_t *dnew, /* new delayed-alloc indirect blocks */
|
|
xfs_fsblock_t *first, /* pointer to firstblock variable */
|
|
xfs_bmap_free_t *flist, /* list of extents to be freed */
|
|
int *logflagsp, /* inode logging flags */
|
|
xfs_extdelta_t *delta, /* Change made to incore extents */
|
|
int rsvd) /* OK to use reserved data block allocation */
|
|
{
|
|
xfs_btree_cur_t *cur; /* btree cursor */
|
|
int diff; /* temp value */
|
|
xfs_bmbt_rec_t *ep; /* extent entry for idx */
|
|
int error; /* error return value */
|
|
#ifdef XFS_BMAP_TRACE
|
|
static char fname[] = "xfs_bmap_add_extent_delay_real";
|
|
#endif
|
|
int i; /* temp state */
|
|
xfs_ifork_t *ifp; /* inode fork pointer */
|
|
xfs_fileoff_t new_endoff; /* end offset of new entry */
|
|
xfs_bmbt_irec_t r[3]; /* neighbor extent entries */
|
|
/* left is 0, right is 1, prev is 2 */
|
|
int rval=0; /* return value (logging flags) */
|
|
int state = 0;/* state bits, accessed thru macros */
|
|
xfs_filblks_t temp=0; /* value for dnew calculations */
|
|
xfs_filblks_t temp2=0;/* value for dnew calculations */
|
|
int tmp_rval; /* partial logging flags */
|
|
enum { /* bit number definitions for state */
|
|
LEFT_CONTIG, RIGHT_CONTIG,
|
|
LEFT_FILLING, RIGHT_FILLING,
|
|
LEFT_DELAY, RIGHT_DELAY,
|
|
LEFT_VALID, RIGHT_VALID
|
|
};
|
|
|
|
#define LEFT r[0]
|
|
#define RIGHT r[1]
|
|
#define PREV r[2]
|
|
#define MASK(b) (1 << (b))
|
|
#define MASK2(a,b) (MASK(a) | MASK(b))
|
|
#define MASK3(a,b,c) (MASK2(a,b) | MASK(c))
|
|
#define MASK4(a,b,c,d) (MASK3(a,b,c) | MASK(d))
|
|
#define STATE_SET(b,v) ((v) ? (state |= MASK(b)) : (state &= ~MASK(b)))
|
|
#define STATE_TEST(b) (state & MASK(b))
|
|
#define STATE_SET_TEST(b,v) ((v) ? ((state |= MASK(b)), 1) : \
|
|
((state &= ~MASK(b)), 0))
|
|
#define SWITCH_STATE \
|
|
(state & MASK4(LEFT_FILLING, RIGHT_FILLING, LEFT_CONTIG, RIGHT_CONTIG))
|
|
|
|
/*
|
|
* Set up a bunch of variables to make the tests simpler.
|
|
*/
|
|
cur = *curp;
|
|
ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
|
|
ep = xfs_iext_get_ext(ifp, idx);
|
|
xfs_bmbt_get_all(ep, &PREV);
|
|
new_endoff = new->br_startoff + new->br_blockcount;
|
|
ASSERT(PREV.br_startoff <= new->br_startoff);
|
|
ASSERT(PREV.br_startoff + PREV.br_blockcount >= new_endoff);
|
|
/*
|
|
* Set flags determining what part of the previous delayed allocation
|
|
* extent is being replaced by a real allocation.
|
|
*/
|
|
STATE_SET(LEFT_FILLING, PREV.br_startoff == new->br_startoff);
|
|
STATE_SET(RIGHT_FILLING,
|
|
PREV.br_startoff + PREV.br_blockcount == new_endoff);
|
|
/*
|
|
* Check and set flags if this segment has a left neighbor.
|
|
* Don't set contiguous if the combined extent would be too large.
|
|
*/
|
|
if (STATE_SET_TEST(LEFT_VALID, idx > 0)) {
|
|
xfs_bmbt_get_all(xfs_iext_get_ext(ifp, idx - 1), &LEFT);
|
|
STATE_SET(LEFT_DELAY, ISNULLSTARTBLOCK(LEFT.br_startblock));
|
|
}
|
|
STATE_SET(LEFT_CONTIG,
|
|
STATE_TEST(LEFT_VALID) && !STATE_TEST(LEFT_DELAY) &&
|
|
LEFT.br_startoff + LEFT.br_blockcount == new->br_startoff &&
|
|
LEFT.br_startblock + LEFT.br_blockcount == new->br_startblock &&
|
|
LEFT.br_state == new->br_state &&
|
|
LEFT.br_blockcount + new->br_blockcount <= MAXEXTLEN);
|
|
/*
|
|
* Check and set flags if this segment has a right neighbor.
|
|
* Don't set contiguous if the combined extent would be too large.
|
|
* Also check for all-three-contiguous being too large.
|
|
*/
|
|
if (STATE_SET_TEST(RIGHT_VALID,
|
|
idx <
|
|
ip->i_df.if_bytes / (uint)sizeof(xfs_bmbt_rec_t) - 1)) {
|
|
xfs_bmbt_get_all(xfs_iext_get_ext(ifp, idx + 1), &RIGHT);
|
|
STATE_SET(RIGHT_DELAY, ISNULLSTARTBLOCK(RIGHT.br_startblock));
|
|
}
|
|
STATE_SET(RIGHT_CONTIG,
|
|
STATE_TEST(RIGHT_VALID) && !STATE_TEST(RIGHT_DELAY) &&
|
|
new_endoff == RIGHT.br_startoff &&
|
|
new->br_startblock + new->br_blockcount ==
|
|
RIGHT.br_startblock &&
|
|
new->br_state == RIGHT.br_state &&
|
|
new->br_blockcount + RIGHT.br_blockcount <= MAXEXTLEN &&
|
|
((state & MASK3(LEFT_CONTIG, LEFT_FILLING, RIGHT_FILLING)) !=
|
|
MASK3(LEFT_CONTIG, LEFT_FILLING, RIGHT_FILLING) ||
|
|
LEFT.br_blockcount + new->br_blockcount + RIGHT.br_blockcount
|
|
<= MAXEXTLEN));
|
|
error = 0;
|
|
/*
|
|
* Switch out based on the FILLING and CONTIG state bits.
|
|
*/
|
|
switch (SWITCH_STATE) {
|
|
|
|
case MASK4(LEFT_FILLING, RIGHT_FILLING, LEFT_CONTIG, RIGHT_CONTIG):
|
|
/*
|
|
* Filling in all of a previously delayed allocation extent.
|
|
* The left and right neighbors are both contiguous with new.
|
|
*/
|
|
xfs_bmap_trace_pre_update(fname, "LF|RF|LC|RC", ip, idx - 1,
|
|
XFS_DATA_FORK);
|
|
xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1),
|
|
LEFT.br_blockcount + PREV.br_blockcount +
|
|
RIGHT.br_blockcount);
|
|
xfs_bmap_trace_post_update(fname, "LF|RF|LC|RC", ip, idx - 1,
|
|
XFS_DATA_FORK);
|
|
xfs_bmap_trace_delete(fname, "LF|RF|LC|RC", ip, idx, 2,
|
|
XFS_DATA_FORK);
|
|
xfs_iext_remove(ifp, idx, 2);
|
|
ip->i_df.if_lastex = idx - 1;
|
|
ip->i_d.di_nextents--;
|
|
if (cur == NULL)
|
|
rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
|
|
else {
|
|
rval = XFS_ILOG_CORE;
|
|
if ((error = xfs_bmbt_lookup_eq(cur, RIGHT.br_startoff,
|
|
RIGHT.br_startblock,
|
|
RIGHT.br_blockcount, &i)))
|
|
goto done;
|
|
ASSERT(i == 1);
|
|
if ((error = xfs_bmbt_delete(cur, &i)))
|
|
goto done;
|
|
ASSERT(i == 1);
|
|
if ((error = xfs_bmbt_decrement(cur, 0, &i)))
|
|
goto done;
|
|
ASSERT(i == 1);
|
|
if ((error = xfs_bmbt_update(cur, LEFT.br_startoff,
|
|
LEFT.br_startblock,
|
|
LEFT.br_blockcount +
|
|
PREV.br_blockcount +
|
|
RIGHT.br_blockcount, LEFT.br_state)))
|
|
goto done;
|
|
}
|
|
*dnew = 0;
|
|
/* DELTA: Three in-core extents are replaced by one. */
|
|
temp = LEFT.br_startoff;
|
|
temp2 = LEFT.br_blockcount +
|
|
PREV.br_blockcount +
|
|
RIGHT.br_blockcount;
|
|
break;
|
|
|
|
case MASK3(LEFT_FILLING, RIGHT_FILLING, LEFT_CONTIG):
|
|
/*
|
|
* Filling in all of a previously delayed allocation extent.
|
|
* The left neighbor is contiguous, the right is not.
|
|
*/
|
|
xfs_bmap_trace_pre_update(fname, "LF|RF|LC", ip, idx - 1,
|
|
XFS_DATA_FORK);
|
|
xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1),
|
|
LEFT.br_blockcount + PREV.br_blockcount);
|
|
xfs_bmap_trace_post_update(fname, "LF|RF|LC", ip, idx - 1,
|
|
XFS_DATA_FORK);
|
|
ip->i_df.if_lastex = idx - 1;
|
|
xfs_bmap_trace_delete(fname, "LF|RF|LC", ip, idx, 1,
|
|
XFS_DATA_FORK);
|
|
xfs_iext_remove(ifp, idx, 1);
|
|
if (cur == NULL)
|
|
rval = XFS_ILOG_DEXT;
|
|
else {
|
|
rval = 0;
|
|
if ((error = xfs_bmbt_lookup_eq(cur, LEFT.br_startoff,
|
|
LEFT.br_startblock, LEFT.br_blockcount,
|
|
&i)))
|
|
goto done;
|
|
ASSERT(i == 1);
|
|
if ((error = xfs_bmbt_update(cur, LEFT.br_startoff,
|
|
LEFT.br_startblock,
|
|
LEFT.br_blockcount +
|
|
PREV.br_blockcount, LEFT.br_state)))
|
|
goto done;
|
|
}
|
|
*dnew = 0;
|
|
/* DELTA: Two in-core extents are replaced by one. */
|
|
temp = LEFT.br_startoff;
|
|
temp2 = LEFT.br_blockcount +
|
|
PREV.br_blockcount;
|
|
break;
|
|
|
|
case MASK3(LEFT_FILLING, RIGHT_FILLING, RIGHT_CONTIG):
|
|
/*
|
|
* Filling in all of a previously delayed allocation extent.
|
|
* The right neighbor is contiguous, the left is not.
|
|
*/
|
|
xfs_bmap_trace_pre_update(fname, "LF|RF|RC", ip, idx,
|
|
XFS_DATA_FORK);
|
|
xfs_bmbt_set_startblock(ep, new->br_startblock);
|
|
xfs_bmbt_set_blockcount(ep,
|
|
PREV.br_blockcount + RIGHT.br_blockcount);
|
|
xfs_bmap_trace_post_update(fname, "LF|RF|RC", ip, idx,
|
|
XFS_DATA_FORK);
|
|
ip->i_df.if_lastex = idx;
|
|
xfs_bmap_trace_delete(fname, "LF|RF|RC", ip, idx + 1, 1,
|
|
XFS_DATA_FORK);
|
|
xfs_iext_remove(ifp, idx + 1, 1);
|
|
if (cur == NULL)
|
|
rval = XFS_ILOG_DEXT;
|
|
else {
|
|
rval = 0;
|
|
if ((error = xfs_bmbt_lookup_eq(cur, RIGHT.br_startoff,
|
|
RIGHT.br_startblock,
|
|
RIGHT.br_blockcount, &i)))
|
|
goto done;
|
|
ASSERT(i == 1);
|
|
if ((error = xfs_bmbt_update(cur, PREV.br_startoff,
|
|
new->br_startblock,
|
|
PREV.br_blockcount +
|
|
RIGHT.br_blockcount, PREV.br_state)))
|
|
goto done;
|
|
}
|
|
*dnew = 0;
|
|
/* DELTA: Two in-core extents are replaced by one. */
|
|
temp = PREV.br_startoff;
|
|
temp2 = PREV.br_blockcount +
|
|
RIGHT.br_blockcount;
|
|
break;
|
|
|
|
case MASK2(LEFT_FILLING, RIGHT_FILLING):
|
|
/*
|
|
* Filling in all of a previously delayed allocation extent.
|
|
* Neither the left nor right neighbors are contiguous with
|
|
* the new one.
|
|
*/
|
|
xfs_bmap_trace_pre_update(fname, "LF|RF", ip, idx,
|
|
XFS_DATA_FORK);
|
|
xfs_bmbt_set_startblock(ep, new->br_startblock);
|
|
xfs_bmap_trace_post_update(fname, "LF|RF", ip, idx,
|
|
XFS_DATA_FORK);
|
|
ip->i_df.if_lastex = idx;
|
|
ip->i_d.di_nextents++;
|
|
if (cur == NULL)
|
|
rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
|
|
else {
|
|
rval = XFS_ILOG_CORE;
|
|
if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff,
|
|
new->br_startblock, new->br_blockcount,
|
|
&i)))
|
|
goto done;
|
|
ASSERT(i == 0);
|
|
cur->bc_rec.b.br_state = XFS_EXT_NORM;
|
|
if ((error = xfs_bmbt_insert(cur, &i)))
|
|
goto done;
|
|
ASSERT(i == 1);
|
|
}
|
|
*dnew = 0;
|
|
/* DELTA: The in-core extent described by new changed type. */
|
|
temp = new->br_startoff;
|
|
temp2 = new->br_blockcount;
|
|
break;
|
|
|
|
case MASK2(LEFT_FILLING, LEFT_CONTIG):
|
|
/*
|
|
* Filling in the first part of a previous delayed allocation.
|
|
* The left neighbor is contiguous.
|
|
*/
|
|
xfs_bmap_trace_pre_update(fname, "LF|LC", ip, idx - 1,
|
|
XFS_DATA_FORK);
|
|
xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1),
|
|
LEFT.br_blockcount + new->br_blockcount);
|
|
xfs_bmbt_set_startoff(ep,
|
|
PREV.br_startoff + new->br_blockcount);
|
|
xfs_bmap_trace_post_update(fname, "LF|LC", ip, idx - 1,
|
|
XFS_DATA_FORK);
|
|
temp = PREV.br_blockcount - new->br_blockcount;
|
|
xfs_bmap_trace_pre_update(fname, "LF|LC", ip, idx,
|
|
XFS_DATA_FORK);
|
|
xfs_bmbt_set_blockcount(ep, temp);
|
|
ip->i_df.if_lastex = idx - 1;
|
|
if (cur == NULL)
|
|
rval = XFS_ILOG_DEXT;
|
|
else {
|
|
rval = 0;
|
|
if ((error = xfs_bmbt_lookup_eq(cur, LEFT.br_startoff,
|
|
LEFT.br_startblock, LEFT.br_blockcount,
|
|
&i)))
|
|
goto done;
|
|
ASSERT(i == 1);
|
|
if ((error = xfs_bmbt_update(cur, LEFT.br_startoff,
|
|
LEFT.br_startblock,
|
|
LEFT.br_blockcount +
|
|
new->br_blockcount,
|
|
LEFT.br_state)))
|
|
goto done;
|
|
}
|
|
temp = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp),
|
|
STARTBLOCKVAL(PREV.br_startblock));
|
|
xfs_bmbt_set_startblock(ep, NULLSTARTBLOCK((int)temp));
|
|
xfs_bmap_trace_post_update(fname, "LF|LC", ip, idx,
|
|
XFS_DATA_FORK);
|
|
*dnew = temp;
|
|
/* DELTA: The boundary between two in-core extents moved. */
|
|
temp = LEFT.br_startoff;
|
|
temp2 = LEFT.br_blockcount +
|
|
PREV.br_blockcount;
|
|
break;
|
|
|
|
case MASK(LEFT_FILLING):
|
|
/*
|
|
* Filling in the first part of a previous delayed allocation.
|
|
* The left neighbor is not contiguous.
|
|
*/
|
|
xfs_bmap_trace_pre_update(fname, "LF", ip, idx, XFS_DATA_FORK);
|
|
xfs_bmbt_set_startoff(ep, new_endoff);
|
|
temp = PREV.br_blockcount - new->br_blockcount;
|
|
xfs_bmbt_set_blockcount(ep, temp);
|
|
xfs_bmap_trace_insert(fname, "LF", ip, idx, 1, new, NULL,
|
|
XFS_DATA_FORK);
|
|
xfs_iext_insert(ifp, idx, 1, new);
|
|
ip->i_df.if_lastex = idx;
|
|
ip->i_d.di_nextents++;
|
|
if (cur == NULL)
|
|
rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
|
|
else {
|
|
rval = XFS_ILOG_CORE;
|
|
if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff,
|
|
new->br_startblock, new->br_blockcount,
|
|
&i)))
|
|
goto done;
|
|
ASSERT(i == 0);
|
|
cur->bc_rec.b.br_state = XFS_EXT_NORM;
|
|
if ((error = xfs_bmbt_insert(cur, &i)))
|
|
goto done;
|
|
ASSERT(i == 1);
|
|
}
|
|
if (ip->i_d.di_format == XFS_DINODE_FMT_EXTENTS &&
|
|
ip->i_d.di_nextents > ip->i_df.if_ext_max) {
|
|
error = xfs_bmap_extents_to_btree(ip->i_transp, ip,
|
|
first, flist, &cur, 1, &tmp_rval,
|
|
XFS_DATA_FORK);
|
|
rval |= tmp_rval;
|
|
if (error)
|
|
goto done;
|
|
}
|
|
temp = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp),
|
|
STARTBLOCKVAL(PREV.br_startblock) -
|
|
(cur ? cur->bc_private.b.allocated : 0));
|
|
ep = xfs_iext_get_ext(ifp, idx + 1);
|
|
xfs_bmbt_set_startblock(ep, NULLSTARTBLOCK((int)temp));
|
|
xfs_bmap_trace_post_update(fname, "LF", ip, idx + 1,
|
|
XFS_DATA_FORK);
|
|
*dnew = temp;
|
|
/* DELTA: One in-core extent is split in two. */
|
|
temp = PREV.br_startoff;
|
|
temp2 = PREV.br_blockcount;
|
|
break;
|
|
|
|
case MASK2(RIGHT_FILLING, RIGHT_CONTIG):
|
|
/*
|
|
* Filling in the last part of a previous delayed allocation.
|
|
* The right neighbor is contiguous with the new allocation.
|
|
*/
|
|
temp = PREV.br_blockcount - new->br_blockcount;
|
|
xfs_bmap_trace_pre_update(fname, "RF|RC", ip, idx,
|
|
XFS_DATA_FORK);
|
|
xfs_bmap_trace_pre_update(fname, "RF|RC", ip, idx + 1,
|
|
XFS_DATA_FORK);
|
|
xfs_bmbt_set_blockcount(ep, temp);
|
|
xfs_bmbt_set_allf(xfs_iext_get_ext(ifp, idx + 1),
|
|
new->br_startoff, new->br_startblock,
|
|
new->br_blockcount + RIGHT.br_blockcount,
|
|
RIGHT.br_state);
|
|
xfs_bmap_trace_post_update(fname, "RF|RC", ip, idx + 1,
|
|
XFS_DATA_FORK);
|
|
ip->i_df.if_lastex = idx + 1;
|
|
if (cur == NULL)
|
|
rval = XFS_ILOG_DEXT;
|
|
else {
|
|
rval = 0;
|
|
if ((error = xfs_bmbt_lookup_eq(cur, RIGHT.br_startoff,
|
|
RIGHT.br_startblock,
|
|
RIGHT.br_blockcount, &i)))
|
|
goto done;
|
|
ASSERT(i == 1);
|
|
if ((error = xfs_bmbt_update(cur, new->br_startoff,
|
|
new->br_startblock,
|
|
new->br_blockcount +
|
|
RIGHT.br_blockcount,
|
|
RIGHT.br_state)))
|
|
goto done;
|
|
}
|
|
temp = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp),
|
|
STARTBLOCKVAL(PREV.br_startblock));
|
|
xfs_bmbt_set_startblock(ep, NULLSTARTBLOCK((int)temp));
|
|
xfs_bmap_trace_post_update(fname, "RF|RC", ip, idx,
|
|
XFS_DATA_FORK);
|
|
*dnew = temp;
|
|
/* DELTA: The boundary between two in-core extents moved. */
|
|
temp = PREV.br_startoff;
|
|
temp2 = PREV.br_blockcount +
|
|
RIGHT.br_blockcount;
|
|
break;
|
|
|
|
case MASK(RIGHT_FILLING):
|
|
/*
|
|
* Filling in the last part of a previous delayed allocation.
|
|
* The right neighbor is not contiguous.
|
|
*/
|
|
temp = PREV.br_blockcount - new->br_blockcount;
|
|
xfs_bmap_trace_pre_update(fname, "RF", ip, idx, XFS_DATA_FORK);
|
|
xfs_bmbt_set_blockcount(ep, temp);
|
|
xfs_bmap_trace_insert(fname, "RF", ip, idx + 1, 1,
|
|
new, NULL, XFS_DATA_FORK);
|
|
xfs_iext_insert(ifp, idx + 1, 1, new);
|
|
ip->i_df.if_lastex = idx + 1;
|
|
ip->i_d.di_nextents++;
|
|
if (cur == NULL)
|
|
rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
|
|
else {
|
|
rval = XFS_ILOG_CORE;
|
|
if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff,
|
|
new->br_startblock, new->br_blockcount,
|
|
&i)))
|
|
goto done;
|
|
ASSERT(i == 0);
|
|
cur->bc_rec.b.br_state = XFS_EXT_NORM;
|
|
if ((error = xfs_bmbt_insert(cur, &i)))
|
|
goto done;
|
|
ASSERT(i == 1);
|
|
}
|
|
if (ip->i_d.di_format == XFS_DINODE_FMT_EXTENTS &&
|
|
ip->i_d.di_nextents > ip->i_df.if_ext_max) {
|
|
error = xfs_bmap_extents_to_btree(ip->i_transp, ip,
|
|
first, flist, &cur, 1, &tmp_rval,
|
|
XFS_DATA_FORK);
|
|
rval |= tmp_rval;
|
|
if (error)
|
|
goto done;
|
|
}
|
|
temp = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp),
|
|
STARTBLOCKVAL(PREV.br_startblock) -
|
|
(cur ? cur->bc_private.b.allocated : 0));
|
|
ep = xfs_iext_get_ext(ifp, idx);
|
|
xfs_bmbt_set_startblock(ep, NULLSTARTBLOCK((int)temp));
|
|
xfs_bmap_trace_post_update(fname, "RF", ip, idx, XFS_DATA_FORK);
|
|
*dnew = temp;
|
|
/* DELTA: One in-core extent is split in two. */
|
|
temp = PREV.br_startoff;
|
|
temp2 = PREV.br_blockcount;
|
|
break;
|
|
|
|
case 0:
|
|
/*
|
|
* Filling in the middle part of a previous delayed allocation.
|
|
* Contiguity is impossible here.
|
|
* This case is avoided almost all the time.
|
|
*/
|
|
temp = new->br_startoff - PREV.br_startoff;
|
|
xfs_bmap_trace_pre_update(fname, "0", ip, idx, XFS_DATA_FORK);
|
|
xfs_bmbt_set_blockcount(ep, temp);
|
|
r[0] = *new;
|
|
r[1].br_startoff = new_endoff;
|
|
temp2 = PREV.br_startoff + PREV.br_blockcount - new_endoff;
|
|
r[1].br_blockcount = temp2;
|
|
xfs_bmap_trace_insert(fname, "0", ip, idx + 1, 2, &r[0], &r[1],
|
|
XFS_DATA_FORK);
|
|
xfs_iext_insert(ifp, idx + 1, 2, &r[0]);
|
|
ip->i_df.if_lastex = idx + 1;
|
|
ip->i_d.di_nextents++;
|
|
if (cur == NULL)
|
|
rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
|
|
else {
|
|
rval = XFS_ILOG_CORE;
|
|
if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff,
|
|
new->br_startblock, new->br_blockcount,
|
|
&i)))
|
|
goto done;
|
|
ASSERT(i == 0);
|
|
cur->bc_rec.b.br_state = XFS_EXT_NORM;
|
|
if ((error = xfs_bmbt_insert(cur, &i)))
|
|
goto done;
|
|
ASSERT(i == 1);
|
|
}
|
|
if (ip->i_d.di_format == XFS_DINODE_FMT_EXTENTS &&
|
|
ip->i_d.di_nextents > ip->i_df.if_ext_max) {
|
|
error = xfs_bmap_extents_to_btree(ip->i_transp, ip,
|
|
first, flist, &cur, 1, &tmp_rval,
|
|
XFS_DATA_FORK);
|
|
rval |= tmp_rval;
|
|
if (error)
|
|
goto done;
|
|
}
|
|
temp = xfs_bmap_worst_indlen(ip, temp);
|
|
temp2 = xfs_bmap_worst_indlen(ip, temp2);
|
|
diff = (int)(temp + temp2 - STARTBLOCKVAL(PREV.br_startblock) -
|
|
(cur ? cur->bc_private.b.allocated : 0));
|
|
if (diff > 0 &&
|
|
xfs_mod_incore_sb(ip->i_mount, XFS_SBS_FDBLOCKS, -diff, rsvd)) {
|
|
/*
|
|
* Ick gross gag me with a spoon.
|
|
*/
|
|
ASSERT(0); /* want to see if this ever happens! */
|
|
while (diff > 0) {
|
|
if (temp) {
|
|
temp--;
|
|
diff--;
|
|
if (!diff ||
|
|
!xfs_mod_incore_sb(ip->i_mount,
|
|
XFS_SBS_FDBLOCKS, -diff, rsvd))
|
|
break;
|
|
}
|
|
if (temp2) {
|
|
temp2--;
|
|
diff--;
|
|
if (!diff ||
|
|
!xfs_mod_incore_sb(ip->i_mount,
|
|
XFS_SBS_FDBLOCKS, -diff, rsvd))
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
ep = xfs_iext_get_ext(ifp, idx);
|
|
xfs_bmbt_set_startblock(ep, NULLSTARTBLOCK((int)temp));
|
|
xfs_bmap_trace_post_update(fname, "0", ip, idx, XFS_DATA_FORK);
|
|
xfs_bmap_trace_pre_update(fname, "0", ip, idx + 2,
|
|
XFS_DATA_FORK);
|
|
xfs_bmbt_set_startblock(xfs_iext_get_ext(ifp, idx + 2),
|
|
NULLSTARTBLOCK((int)temp2));
|
|
xfs_bmap_trace_post_update(fname, "0", ip, idx + 2,
|
|
XFS_DATA_FORK);
|
|
*dnew = temp + temp2;
|
|
/* DELTA: One in-core extent is split in three. */
|
|
temp = PREV.br_startoff;
|
|
temp2 = PREV.br_blockcount;
|
|
break;
|
|
|
|
case MASK3(LEFT_FILLING, LEFT_CONTIG, RIGHT_CONTIG):
|
|
case MASK3(RIGHT_FILLING, LEFT_CONTIG, RIGHT_CONTIG):
|
|
case MASK2(LEFT_FILLING, RIGHT_CONTIG):
|
|
case MASK2(RIGHT_FILLING, LEFT_CONTIG):
|
|
case MASK2(LEFT_CONTIG, RIGHT_CONTIG):
|
|
case MASK(LEFT_CONTIG):
|
|
case MASK(RIGHT_CONTIG):
|
|
/*
|
|
* These cases are all impossible.
|
|
*/
|
|
ASSERT(0);
|
|
}
|
|
*curp = cur;
|
|
if (delta) {
|
|
temp2 += temp;
|
|
if (delta->xed_startoff > temp)
|
|
delta->xed_startoff = temp;
|
|
if (delta->xed_blockcount < temp2)
|
|
delta->xed_blockcount = temp2;
|
|
}
|
|
done:
|
|
*logflagsp = rval;
|
|
return error;
|
|
#undef LEFT
|
|
#undef RIGHT
|
|
#undef PREV
|
|
#undef MASK
|
|
#undef MASK2
|
|
#undef MASK3
|
|
#undef MASK4
|
|
#undef STATE_SET
|
|
#undef STATE_TEST
|
|
#undef STATE_SET_TEST
|
|
#undef SWITCH_STATE
|
|
}
|
|
|
|
/*
|
|
* Called by xfs_bmap_add_extent to handle cases converting an unwritten
|
|
* allocation to a real allocation or vice versa.
|
|
*/
|
|
STATIC int /* error */
|
|
xfs_bmap_add_extent_unwritten_real(
|
|
xfs_inode_t *ip, /* incore inode pointer */
|
|
xfs_extnum_t idx, /* extent number to update/insert */
|
|
xfs_btree_cur_t **curp, /* if *curp is null, not a btree */
|
|
xfs_bmbt_irec_t *new, /* new data to add to file extents */
|
|
int *logflagsp, /* inode logging flags */
|
|
xfs_extdelta_t *delta) /* Change made to incore extents */
|
|
{
|
|
xfs_btree_cur_t *cur; /* btree cursor */
|
|
xfs_bmbt_rec_t *ep; /* extent entry for idx */
|
|
int error; /* error return value */
|
|
#ifdef XFS_BMAP_TRACE
|
|
static char fname[] = "xfs_bmap_add_extent_unwritten_real";
|
|
#endif
|
|
int i; /* temp state */
|
|
xfs_ifork_t *ifp; /* inode fork pointer */
|
|
xfs_fileoff_t new_endoff; /* end offset of new entry */
|
|
xfs_exntst_t newext; /* new extent state */
|
|
xfs_exntst_t oldext; /* old extent state */
|
|
xfs_bmbt_irec_t r[3]; /* neighbor extent entries */
|
|
/* left is 0, right is 1, prev is 2 */
|
|
int rval=0; /* return value (logging flags) */
|
|
int state = 0;/* state bits, accessed thru macros */
|
|
xfs_filblks_t temp=0;
|
|
xfs_filblks_t temp2=0;
|
|
enum { /* bit number definitions for state */
|
|
LEFT_CONTIG, RIGHT_CONTIG,
|
|
LEFT_FILLING, RIGHT_FILLING,
|
|
LEFT_DELAY, RIGHT_DELAY,
|
|
LEFT_VALID, RIGHT_VALID
|
|
};
|
|
|
|
#define LEFT r[0]
|
|
#define RIGHT r[1]
|
|
#define PREV r[2]
|
|
#define MASK(b) (1 << (b))
|
|
#define MASK2(a,b) (MASK(a) | MASK(b))
|
|
#define MASK3(a,b,c) (MASK2(a,b) | MASK(c))
|
|
#define MASK4(a,b,c,d) (MASK3(a,b,c) | MASK(d))
|
|
#define STATE_SET(b,v) ((v) ? (state |= MASK(b)) : (state &= ~MASK(b)))
|
|
#define STATE_TEST(b) (state & MASK(b))
|
|
#define STATE_SET_TEST(b,v) ((v) ? ((state |= MASK(b)), 1) : \
|
|
((state &= ~MASK(b)), 0))
|
|
#define SWITCH_STATE \
|
|
(state & MASK4(LEFT_FILLING, RIGHT_FILLING, LEFT_CONTIG, RIGHT_CONTIG))
|
|
|
|
/*
|
|
* Set up a bunch of variables to make the tests simpler.
|
|
*/
|
|
error = 0;
|
|
cur = *curp;
|
|
ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
|
|
ep = xfs_iext_get_ext(ifp, idx);
|
|
xfs_bmbt_get_all(ep, &PREV);
|
|
newext = new->br_state;
|
|
oldext = (newext == XFS_EXT_UNWRITTEN) ?
|
|
XFS_EXT_NORM : XFS_EXT_UNWRITTEN;
|
|
ASSERT(PREV.br_state == oldext);
|
|
new_endoff = new->br_startoff + new->br_blockcount;
|
|
ASSERT(PREV.br_startoff <= new->br_startoff);
|
|
ASSERT(PREV.br_startoff + PREV.br_blockcount >= new_endoff);
|
|
/*
|
|
* Set flags determining what part of the previous oldext allocation
|
|
* extent is being replaced by a newext allocation.
|
|
*/
|
|
STATE_SET(LEFT_FILLING, PREV.br_startoff == new->br_startoff);
|
|
STATE_SET(RIGHT_FILLING,
|
|
PREV.br_startoff + PREV.br_blockcount == new_endoff);
|
|
/*
|
|
* Check and set flags if this segment has a left neighbor.
|
|
* Don't set contiguous if the combined extent would be too large.
|
|
*/
|
|
if (STATE_SET_TEST(LEFT_VALID, idx > 0)) {
|
|
xfs_bmbt_get_all(xfs_iext_get_ext(ifp, idx - 1), &LEFT);
|
|
STATE_SET(LEFT_DELAY, ISNULLSTARTBLOCK(LEFT.br_startblock));
|
|
}
|
|
STATE_SET(LEFT_CONTIG,
|
|
STATE_TEST(LEFT_VALID) && !STATE_TEST(LEFT_DELAY) &&
|
|
LEFT.br_startoff + LEFT.br_blockcount == new->br_startoff &&
|
|
LEFT.br_startblock + LEFT.br_blockcount == new->br_startblock &&
|
|
LEFT.br_state == newext &&
|
|
LEFT.br_blockcount + new->br_blockcount <= MAXEXTLEN);
|
|
/*
|
|
* Check and set flags if this segment has a right neighbor.
|
|
* Don't set contiguous if the combined extent would be too large.
|
|
* Also check for all-three-contiguous being too large.
|
|
*/
|
|
if (STATE_SET_TEST(RIGHT_VALID,
|
|
idx <
|
|
ip->i_df.if_bytes / (uint)sizeof(xfs_bmbt_rec_t) - 1)) {
|
|
xfs_bmbt_get_all(xfs_iext_get_ext(ifp, idx + 1), &RIGHT);
|
|
STATE_SET(RIGHT_DELAY, ISNULLSTARTBLOCK(RIGHT.br_startblock));
|
|
}
|
|
STATE_SET(RIGHT_CONTIG,
|
|
STATE_TEST(RIGHT_VALID) && !STATE_TEST(RIGHT_DELAY) &&
|
|
new_endoff == RIGHT.br_startoff &&
|
|
new->br_startblock + new->br_blockcount ==
|
|
RIGHT.br_startblock &&
|
|
newext == RIGHT.br_state &&
|
|
new->br_blockcount + RIGHT.br_blockcount <= MAXEXTLEN &&
|
|
((state & MASK3(LEFT_CONTIG, LEFT_FILLING, RIGHT_FILLING)) !=
|
|
MASK3(LEFT_CONTIG, LEFT_FILLING, RIGHT_FILLING) ||
|
|
LEFT.br_blockcount + new->br_blockcount + RIGHT.br_blockcount
|
|
<= MAXEXTLEN));
|
|
/*
|
|
* Switch out based on the FILLING and CONTIG state bits.
|
|
*/
|
|
switch (SWITCH_STATE) {
|
|
|
|
case MASK4(LEFT_FILLING, RIGHT_FILLING, LEFT_CONTIG, RIGHT_CONTIG):
|
|
/*
|
|
* Setting all of a previous oldext extent to newext.
|
|
* The left and right neighbors are both contiguous with new.
|
|
*/
|
|
xfs_bmap_trace_pre_update(fname, "LF|RF|LC|RC", ip, idx - 1,
|
|
XFS_DATA_FORK);
|
|
xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1),
|
|
LEFT.br_blockcount + PREV.br_blockcount +
|
|
RIGHT.br_blockcount);
|
|
xfs_bmap_trace_post_update(fname, "LF|RF|LC|RC", ip, idx - 1,
|
|
XFS_DATA_FORK);
|
|
xfs_bmap_trace_delete(fname, "LF|RF|LC|RC", ip, idx, 2,
|
|
XFS_DATA_FORK);
|
|
xfs_iext_remove(ifp, idx, 2);
|
|
ip->i_df.if_lastex = idx - 1;
|
|
ip->i_d.di_nextents -= 2;
|
|
if (cur == NULL)
|
|
rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
|
|
else {
|
|
rval = XFS_ILOG_CORE;
|
|
if ((error = xfs_bmbt_lookup_eq(cur, RIGHT.br_startoff,
|
|
RIGHT.br_startblock,
|
|
RIGHT.br_blockcount, &i)))
|
|
goto done;
|
|
ASSERT(i == 1);
|
|
if ((error = xfs_bmbt_delete(cur, &i)))
|
|
goto done;
|
|
ASSERT(i == 1);
|
|
if ((error = xfs_bmbt_decrement(cur, 0, &i)))
|
|
goto done;
|
|
ASSERT(i == 1);
|
|
if ((error = xfs_bmbt_delete(cur, &i)))
|
|
goto done;
|
|
ASSERT(i == 1);
|
|
if ((error = xfs_bmbt_decrement(cur, 0, &i)))
|
|
goto done;
|
|
ASSERT(i == 1);
|
|
if ((error = xfs_bmbt_update(cur, LEFT.br_startoff,
|
|
LEFT.br_startblock,
|
|
LEFT.br_blockcount + PREV.br_blockcount +
|
|
RIGHT.br_blockcount, LEFT.br_state)))
|
|
goto done;
|
|
}
|
|
/* DELTA: Three in-core extents are replaced by one. */
|
|
temp = LEFT.br_startoff;
|
|
temp2 = LEFT.br_blockcount +
|
|
PREV.br_blockcount +
|
|
RIGHT.br_blockcount;
|
|
break;
|
|
|
|
case MASK3(LEFT_FILLING, RIGHT_FILLING, LEFT_CONTIG):
|
|
/*
|
|
* Setting all of a previous oldext extent to newext.
|
|
* The left neighbor is contiguous, the right is not.
|
|
*/
|
|
xfs_bmap_trace_pre_update(fname, "LF|RF|LC", ip, idx - 1,
|
|
XFS_DATA_FORK);
|
|
xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1),
|
|
LEFT.br_blockcount + PREV.br_blockcount);
|
|
xfs_bmap_trace_post_update(fname, "LF|RF|LC", ip, idx - 1,
|
|
XFS_DATA_FORK);
|
|
ip->i_df.if_lastex = idx - 1;
|
|
xfs_bmap_trace_delete(fname, "LF|RF|LC", ip, idx, 1,
|
|
XFS_DATA_FORK);
|
|
xfs_iext_remove(ifp, idx, 1);
|
|
ip->i_d.di_nextents--;
|
|
if (cur == NULL)
|
|
rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
|
|
else {
|
|
rval = XFS_ILOG_CORE;
|
|
if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff,
|
|
PREV.br_startblock, PREV.br_blockcount,
|
|
&i)))
|
|
goto done;
|
|
ASSERT(i == 1);
|
|
if ((error = xfs_bmbt_delete(cur, &i)))
|
|
goto done;
|
|
ASSERT(i == 1);
|
|
if ((error = xfs_bmbt_decrement(cur, 0, &i)))
|
|
goto done;
|
|
ASSERT(i == 1);
|
|
if ((error = xfs_bmbt_update(cur, LEFT.br_startoff,
|
|
LEFT.br_startblock,
|
|
LEFT.br_blockcount + PREV.br_blockcount,
|
|
LEFT.br_state)))
|
|
goto done;
|
|
}
|
|
/* DELTA: Two in-core extents are replaced by one. */
|
|
temp = LEFT.br_startoff;
|
|
temp2 = LEFT.br_blockcount +
|
|
PREV.br_blockcount;
|
|
break;
|
|
|
|
case MASK3(LEFT_FILLING, RIGHT_FILLING, RIGHT_CONTIG):
|
|
/*
|
|
* Setting all of a previous oldext extent to newext.
|
|
* The right neighbor is contiguous, the left is not.
|
|
*/
|
|
xfs_bmap_trace_pre_update(fname, "LF|RF|RC", ip, idx,
|
|
XFS_DATA_FORK);
|
|
xfs_bmbt_set_blockcount(ep,
|
|
PREV.br_blockcount + RIGHT.br_blockcount);
|
|
xfs_bmbt_set_state(ep, newext);
|
|
xfs_bmap_trace_post_update(fname, "LF|RF|RC", ip, idx,
|
|
XFS_DATA_FORK);
|
|
ip->i_df.if_lastex = idx;
|
|
xfs_bmap_trace_delete(fname, "LF|RF|RC", ip, idx + 1, 1,
|
|
XFS_DATA_FORK);
|
|
xfs_iext_remove(ifp, idx + 1, 1);
|
|
ip->i_d.di_nextents--;
|
|
if (cur == NULL)
|
|
rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
|
|
else {
|
|
rval = XFS_ILOG_CORE;
|
|
if ((error = xfs_bmbt_lookup_eq(cur, RIGHT.br_startoff,
|
|
RIGHT.br_startblock,
|
|
RIGHT.br_blockcount, &i)))
|
|
goto done;
|
|
ASSERT(i == 1);
|
|
if ((error = xfs_bmbt_delete(cur, &i)))
|
|
goto done;
|
|
ASSERT(i == 1);
|
|
if ((error = xfs_bmbt_decrement(cur, 0, &i)))
|
|
goto done;
|
|
ASSERT(i == 1);
|
|
if ((error = xfs_bmbt_update(cur, new->br_startoff,
|
|
new->br_startblock,
|
|
new->br_blockcount + RIGHT.br_blockcount,
|
|
newext)))
|
|
goto done;
|
|
}
|
|
/* DELTA: Two in-core extents are replaced by one. */
|
|
temp = PREV.br_startoff;
|
|
temp2 = PREV.br_blockcount +
|
|
RIGHT.br_blockcount;
|
|
break;
|
|
|
|
case MASK2(LEFT_FILLING, RIGHT_FILLING):
|
|
/*
|
|
* Setting all of a previous oldext extent to newext.
|
|
* Neither the left nor right neighbors are contiguous with
|
|
* the new one.
|
|
*/
|
|
xfs_bmap_trace_pre_update(fname, "LF|RF", ip, idx,
|
|
XFS_DATA_FORK);
|
|
xfs_bmbt_set_state(ep, newext);
|
|
xfs_bmap_trace_post_update(fname, "LF|RF", ip, idx,
|
|
XFS_DATA_FORK);
|
|
ip->i_df.if_lastex = idx;
|
|
if (cur == NULL)
|
|
rval = XFS_ILOG_DEXT;
|
|
else {
|
|
rval = 0;
|
|
if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff,
|
|
new->br_startblock, new->br_blockcount,
|
|
&i)))
|
|
goto done;
|
|
ASSERT(i == 1);
|
|
if ((error = xfs_bmbt_update(cur, new->br_startoff,
|
|
new->br_startblock, new->br_blockcount,
|
|
newext)))
|
|
goto done;
|
|
}
|
|
/* DELTA: The in-core extent described by new changed type. */
|
|
temp = new->br_startoff;
|
|
temp2 = new->br_blockcount;
|
|
break;
|
|
|
|
case MASK2(LEFT_FILLING, LEFT_CONTIG):
|
|
/*
|
|
* Setting the first part of a previous oldext extent to newext.
|
|
* The left neighbor is contiguous.
|
|
*/
|
|
xfs_bmap_trace_pre_update(fname, "LF|LC", ip, idx - 1,
|
|
XFS_DATA_FORK);
|
|
xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1),
|
|
LEFT.br_blockcount + new->br_blockcount);
|
|
xfs_bmbt_set_startoff(ep,
|
|
PREV.br_startoff + new->br_blockcount);
|
|
xfs_bmap_trace_post_update(fname, "LF|LC", ip, idx - 1,
|
|
XFS_DATA_FORK);
|
|
xfs_bmap_trace_pre_update(fname, "LF|LC", ip, idx,
|
|
XFS_DATA_FORK);
|
|
xfs_bmbt_set_startblock(ep,
|
|
new->br_startblock + new->br_blockcount);
|
|
xfs_bmbt_set_blockcount(ep,
|
|
PREV.br_blockcount - new->br_blockcount);
|
|
xfs_bmap_trace_post_update(fname, "LF|LC", ip, idx,
|
|
XFS_DATA_FORK);
|
|
ip->i_df.if_lastex = idx - 1;
|
|
if (cur == NULL)
|
|
rval = XFS_ILOG_DEXT;
|
|
else {
|
|
rval = 0;
|
|
if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff,
|
|
PREV.br_startblock, PREV.br_blockcount,
|
|
&i)))
|
|
goto done;
|
|
ASSERT(i == 1);
|
|
if ((error = xfs_bmbt_update(cur,
|
|
PREV.br_startoff + new->br_blockcount,
|
|
PREV.br_startblock + new->br_blockcount,
|
|
PREV.br_blockcount - new->br_blockcount,
|
|
oldext)))
|
|
goto done;
|
|
if ((error = xfs_bmbt_decrement(cur, 0, &i)))
|
|
goto done;
|
|
if (xfs_bmbt_update(cur, LEFT.br_startoff,
|
|
LEFT.br_startblock,
|
|
LEFT.br_blockcount + new->br_blockcount,
|
|
LEFT.br_state))
|
|
goto done;
|
|
}
|
|
/* DELTA: The boundary between two in-core extents moved. */
|
|
temp = LEFT.br_startoff;
|
|
temp2 = LEFT.br_blockcount +
|
|
PREV.br_blockcount;
|
|
break;
|
|
|
|
case MASK(LEFT_FILLING):
|
|
/*
|
|
* Setting the first part of a previous oldext extent to newext.
|
|
* The left neighbor is not contiguous.
|
|
*/
|
|
xfs_bmap_trace_pre_update(fname, "LF", ip, idx, XFS_DATA_FORK);
|
|
ASSERT(ep && xfs_bmbt_get_state(ep) == oldext);
|
|
xfs_bmbt_set_startoff(ep, new_endoff);
|
|
xfs_bmbt_set_blockcount(ep,
|
|
PREV.br_blockcount - new->br_blockcount);
|
|
xfs_bmbt_set_startblock(ep,
|
|
new->br_startblock + new->br_blockcount);
|
|
xfs_bmap_trace_post_update(fname, "LF", ip, idx, XFS_DATA_FORK);
|
|
xfs_bmap_trace_insert(fname, "LF", ip, idx, 1, new, NULL,
|
|
XFS_DATA_FORK);
|
|
xfs_iext_insert(ifp, idx, 1, new);
|
|
ip->i_df.if_lastex = idx;
|
|
ip->i_d.di_nextents++;
|
|
if (cur == NULL)
|
|
rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
|
|
else {
|
|
rval = XFS_ILOG_CORE;
|
|
if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff,
|
|
PREV.br_startblock, PREV.br_blockcount,
|
|
&i)))
|
|
goto done;
|
|
ASSERT(i == 1);
|
|
if ((error = xfs_bmbt_update(cur,
|
|
PREV.br_startoff + new->br_blockcount,
|
|
PREV.br_startblock + new->br_blockcount,
|
|
PREV.br_blockcount - new->br_blockcount,
|
|
oldext)))
|
|
goto done;
|
|
cur->bc_rec.b = *new;
|
|
if ((error = xfs_bmbt_insert(cur, &i)))
|
|
goto done;
|
|
ASSERT(i == 1);
|
|
}
|
|
/* DELTA: One in-core extent is split in two. */
|
|
temp = PREV.br_startoff;
|
|
temp2 = PREV.br_blockcount;
|
|
break;
|
|
|
|
case MASK2(RIGHT_FILLING, RIGHT_CONTIG):
|
|
/*
|
|
* Setting the last part of a previous oldext extent to newext.
|
|
* The right neighbor is contiguous with the new allocation.
|
|
*/
|
|
xfs_bmap_trace_pre_update(fname, "RF|RC", ip, idx,
|
|
XFS_DATA_FORK);
|
|
xfs_bmap_trace_pre_update(fname, "RF|RC", ip, idx + 1,
|
|
XFS_DATA_FORK);
|
|
xfs_bmbt_set_blockcount(ep,
|
|
PREV.br_blockcount - new->br_blockcount);
|
|
xfs_bmap_trace_post_update(fname, "RF|RC", ip, idx,
|
|
XFS_DATA_FORK);
|
|
xfs_bmbt_set_allf(xfs_iext_get_ext(ifp, idx + 1),
|
|
new->br_startoff, new->br_startblock,
|
|
new->br_blockcount + RIGHT.br_blockcount, newext);
|
|
xfs_bmap_trace_post_update(fname, "RF|RC", ip, idx + 1,
|
|
XFS_DATA_FORK);
|
|
ip->i_df.if_lastex = idx + 1;
|
|
if (cur == NULL)
|
|
rval = XFS_ILOG_DEXT;
|
|
else {
|
|
rval = 0;
|
|
if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff,
|
|
PREV.br_startblock,
|
|
PREV.br_blockcount, &i)))
|
|
goto done;
|
|
ASSERT(i == 1);
|
|
if ((error = xfs_bmbt_update(cur, PREV.br_startoff,
|
|
PREV.br_startblock,
|
|
PREV.br_blockcount - new->br_blockcount,
|
|
oldext)))
|
|
goto done;
|
|
if ((error = xfs_bmbt_increment(cur, 0, &i)))
|
|
goto done;
|
|
if ((error = xfs_bmbt_update(cur, new->br_startoff,
|
|
new->br_startblock,
|
|
new->br_blockcount + RIGHT.br_blockcount,
|
|
newext)))
|
|
goto done;
|
|
}
|
|
/* DELTA: The boundary between two in-core extents moved. */
|
|
temp = PREV.br_startoff;
|
|
temp2 = PREV.br_blockcount +
|
|
RIGHT.br_blockcount;
|
|
break;
|
|
|
|
case MASK(RIGHT_FILLING):
|
|
/*
|
|
* Setting the last part of a previous oldext extent to newext.
|
|
* The right neighbor is not contiguous.
|
|
*/
|
|
xfs_bmap_trace_pre_update(fname, "RF", ip, idx, XFS_DATA_FORK);
|
|
xfs_bmbt_set_blockcount(ep,
|
|
PREV.br_blockcount - new->br_blockcount);
|
|
xfs_bmap_trace_post_update(fname, "RF", ip, idx, XFS_DATA_FORK);
|
|
xfs_bmap_trace_insert(fname, "RF", ip, idx + 1, 1,
|
|
new, NULL, XFS_DATA_FORK);
|
|
xfs_iext_insert(ifp, idx + 1, 1, new);
|
|
ip->i_df.if_lastex = idx + 1;
|
|
ip->i_d.di_nextents++;
|
|
if (cur == NULL)
|
|
rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
|
|
else {
|
|
rval = XFS_ILOG_CORE;
|
|
if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff,
|
|
PREV.br_startblock, PREV.br_blockcount,
|
|
&i)))
|
|
goto done;
|
|
ASSERT(i == 1);
|
|
if ((error = xfs_bmbt_update(cur, PREV.br_startoff,
|
|
PREV.br_startblock,
|
|
PREV.br_blockcount - new->br_blockcount,
|
|
oldext)))
|
|
goto done;
|
|
if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff,
|
|
new->br_startblock, new->br_blockcount,
|
|
&i)))
|
|
goto done;
|
|
ASSERT(i == 0);
|
|
cur->bc_rec.b.br_state = XFS_EXT_NORM;
|
|
if ((error = xfs_bmbt_insert(cur, &i)))
|
|
goto done;
|
|
ASSERT(i == 1);
|
|
}
|
|
/* DELTA: One in-core extent is split in two. */
|
|
temp = PREV.br_startoff;
|
|
temp2 = PREV.br_blockcount;
|
|
break;
|
|
|
|
case 0:
|
|
/*
|
|
* Setting the middle part of a previous oldext extent to
|
|
* newext. Contiguity is impossible here.
|
|
* One extent becomes three extents.
|
|
*/
|
|
xfs_bmap_trace_pre_update(fname, "0", ip, idx, XFS_DATA_FORK);
|
|
xfs_bmbt_set_blockcount(ep,
|
|
new->br_startoff - PREV.br_startoff);
|
|
xfs_bmap_trace_post_update(fname, "0", ip, idx, XFS_DATA_FORK);
|
|
r[0] = *new;
|
|
r[1].br_startoff = new_endoff;
|
|
r[1].br_blockcount =
|
|
PREV.br_startoff + PREV.br_blockcount - new_endoff;
|
|
r[1].br_startblock = new->br_startblock + new->br_blockcount;
|
|
r[1].br_state = oldext;
|
|
xfs_bmap_trace_insert(fname, "0", ip, idx + 1, 2, &r[0], &r[1],
|
|
XFS_DATA_FORK);
|
|
xfs_iext_insert(ifp, idx + 1, 2, &r[0]);
|
|
ip->i_df.if_lastex = idx + 1;
|
|
ip->i_d.di_nextents += 2;
|
|
if (cur == NULL)
|
|
rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
|
|
else {
|
|
rval = XFS_ILOG_CORE;
|
|
if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff,
|
|
PREV.br_startblock, PREV.br_blockcount,
|
|
&i)))
|
|
goto done;
|
|
ASSERT(i == 1);
|
|
/* new right extent - oldext */
|
|
if ((error = xfs_bmbt_update(cur, r[1].br_startoff,
|
|
r[1].br_startblock, r[1].br_blockcount,
|
|
r[1].br_state)))
|
|
goto done;
|
|
/* new left extent - oldext */
|
|
PREV.br_blockcount =
|
|
new->br_startoff - PREV.br_startoff;
|
|
cur->bc_rec.b = PREV;
|
|
if ((error = xfs_bmbt_insert(cur, &i)))
|
|
goto done;
|
|
ASSERT(i == 1);
|
|
if ((error = xfs_bmbt_increment(cur, 0, &i)))
|
|
goto done;
|
|
ASSERT(i == 1);
|
|
/* new middle extent - newext */
|
|
cur->bc_rec.b = *new;
|
|
if ((error = xfs_bmbt_insert(cur, &i)))
|
|
goto done;
|
|
ASSERT(i == 1);
|
|
}
|
|
/* DELTA: One in-core extent is split in three. */
|
|
temp = PREV.br_startoff;
|
|
temp2 = PREV.br_blockcount;
|
|
break;
|
|
|
|
case MASK3(LEFT_FILLING, LEFT_CONTIG, RIGHT_CONTIG):
|
|
case MASK3(RIGHT_FILLING, LEFT_CONTIG, RIGHT_CONTIG):
|
|
case MASK2(LEFT_FILLING, RIGHT_CONTIG):
|
|
case MASK2(RIGHT_FILLING, LEFT_CONTIG):
|
|
case MASK2(LEFT_CONTIG, RIGHT_CONTIG):
|
|
case MASK(LEFT_CONTIG):
|
|
case MASK(RIGHT_CONTIG):
|
|
/*
|
|
* These cases are all impossible.
|
|
*/
|
|
ASSERT(0);
|
|
}
|
|
*curp = cur;
|
|
if (delta) {
|
|
temp2 += temp;
|
|
if (delta->xed_startoff > temp)
|
|
delta->xed_startoff = temp;
|
|
if (delta->xed_blockcount < temp2)
|
|
delta->xed_blockcount = temp2;
|
|
}
|
|
done:
|
|
*logflagsp = rval;
|
|
return error;
|
|
#undef LEFT
|
|
#undef RIGHT
|
|
#undef PREV
|
|
#undef MASK
|
|
#undef MASK2
|
|
#undef MASK3
|
|
#undef MASK4
|
|
#undef STATE_SET
|
|
#undef STATE_TEST
|
|
#undef STATE_SET_TEST
|
|
#undef SWITCH_STATE
|
|
}
|
|
|
|
/*
|
|
* Called by xfs_bmap_add_extent to handle cases converting a hole
|
|
* to a delayed allocation.
|
|
*/
|
|
/*ARGSUSED*/
|
|
STATIC int /* error */
|
|
xfs_bmap_add_extent_hole_delay(
|
|
xfs_inode_t *ip, /* incore inode pointer */
|
|
xfs_extnum_t idx, /* extent number to update/insert */
|
|
xfs_btree_cur_t *cur, /* if null, not a btree */
|
|
xfs_bmbt_irec_t *new, /* new data to add to file extents */
|
|
int *logflagsp, /* inode logging flags */
|
|
xfs_extdelta_t *delta, /* Change made to incore extents */
|
|
int rsvd) /* OK to allocate reserved blocks */
|
|
{
|
|
xfs_bmbt_rec_t *ep; /* extent record for idx */
|
|
#ifdef XFS_BMAP_TRACE
|
|
static char fname[] = "xfs_bmap_add_extent_hole_delay";
|
|
#endif
|
|
xfs_ifork_t *ifp; /* inode fork pointer */
|
|
xfs_bmbt_irec_t left; /* left neighbor extent entry */
|
|
xfs_filblks_t newlen=0; /* new indirect size */
|
|
xfs_filblks_t oldlen=0; /* old indirect size */
|
|
xfs_bmbt_irec_t right; /* right neighbor extent entry */
|
|
int state; /* state bits, accessed thru macros */
|
|
xfs_filblks_t temp=0; /* temp for indirect calculations */
|
|
xfs_filblks_t temp2=0;
|
|
enum { /* bit number definitions for state */
|
|
LEFT_CONTIG, RIGHT_CONTIG,
|
|
LEFT_DELAY, RIGHT_DELAY,
|
|
LEFT_VALID, RIGHT_VALID
|
|
};
|
|
|
|
#define MASK(b) (1 << (b))
|
|
#define MASK2(a,b) (MASK(a) | MASK(b))
|
|
#define STATE_SET(b,v) ((v) ? (state |= MASK(b)) : (state &= ~MASK(b)))
|
|
#define STATE_TEST(b) (state & MASK(b))
|
|
#define STATE_SET_TEST(b,v) ((v) ? ((state |= MASK(b)), 1) : \
|
|
((state &= ~MASK(b)), 0))
|
|
#define SWITCH_STATE (state & MASK2(LEFT_CONTIG, RIGHT_CONTIG))
|
|
|
|
ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
|
|
ep = xfs_iext_get_ext(ifp, idx);
|
|
state = 0;
|
|
ASSERT(ISNULLSTARTBLOCK(new->br_startblock));
|
|
/*
|
|
* Check and set flags if this segment has a left neighbor
|
|
*/
|
|
if (STATE_SET_TEST(LEFT_VALID, idx > 0)) {
|
|
xfs_bmbt_get_all(xfs_iext_get_ext(ifp, idx - 1), &left);
|
|
STATE_SET(LEFT_DELAY, ISNULLSTARTBLOCK(left.br_startblock));
|
|
}
|
|
/*
|
|
* Check and set flags if the current (right) segment exists.
|
|
* If it doesn't exist, we're converting the hole at end-of-file.
|
|
*/
|
|
if (STATE_SET_TEST(RIGHT_VALID,
|
|
idx <
|
|
ip->i_df.if_bytes / (uint)sizeof(xfs_bmbt_rec_t))) {
|
|
xfs_bmbt_get_all(ep, &right);
|
|
STATE_SET(RIGHT_DELAY, ISNULLSTARTBLOCK(right.br_startblock));
|
|
}
|
|
/*
|
|
* Set contiguity flags on the left and right neighbors.
|
|
* Don't let extents get too large, even if the pieces are contiguous.
|
|
*/
|
|
STATE_SET(LEFT_CONTIG,
|
|
STATE_TEST(LEFT_VALID) && STATE_TEST(LEFT_DELAY) &&
|
|
left.br_startoff + left.br_blockcount == new->br_startoff &&
|
|
left.br_blockcount + new->br_blockcount <= MAXEXTLEN);
|
|
STATE_SET(RIGHT_CONTIG,
|
|
STATE_TEST(RIGHT_VALID) && STATE_TEST(RIGHT_DELAY) &&
|
|
new->br_startoff + new->br_blockcount == right.br_startoff &&
|
|
new->br_blockcount + right.br_blockcount <= MAXEXTLEN &&
|
|
(!STATE_TEST(LEFT_CONTIG) ||
|
|
(left.br_blockcount + new->br_blockcount +
|
|
right.br_blockcount <= MAXEXTLEN)));
|
|
/*
|
|
* Switch out based on the contiguity flags.
|
|
*/
|
|
switch (SWITCH_STATE) {
|
|
|
|
case MASK2(LEFT_CONTIG, RIGHT_CONTIG):
|
|
/*
|
|
* New allocation is contiguous with delayed allocations
|
|
* on the left and on the right.
|
|
* Merge all three into a single extent record.
|
|
*/
|
|
temp = left.br_blockcount + new->br_blockcount +
|
|
right.br_blockcount;
|
|
xfs_bmap_trace_pre_update(fname, "LC|RC", ip, idx - 1,
|
|
XFS_DATA_FORK);
|
|
xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1), temp);
|
|
oldlen = STARTBLOCKVAL(left.br_startblock) +
|
|
STARTBLOCKVAL(new->br_startblock) +
|
|
STARTBLOCKVAL(right.br_startblock);
|
|
newlen = xfs_bmap_worst_indlen(ip, temp);
|
|
xfs_bmbt_set_startblock(xfs_iext_get_ext(ifp, idx - 1),
|
|
NULLSTARTBLOCK((int)newlen));
|
|
xfs_bmap_trace_post_update(fname, "LC|RC", ip, idx - 1,
|
|
XFS_DATA_FORK);
|
|
xfs_bmap_trace_delete(fname, "LC|RC", ip, idx, 1,
|
|
XFS_DATA_FORK);
|
|
xfs_iext_remove(ifp, idx, 1);
|
|
ip->i_df.if_lastex = idx - 1;
|
|
/* DELTA: Two in-core extents were replaced by one. */
|
|
temp2 = temp;
|
|
temp = left.br_startoff;
|
|
break;
|
|
|
|
case MASK(LEFT_CONTIG):
|
|
/*
|
|
* New allocation is contiguous with a delayed allocation
|
|
* on the left.
|
|
* Merge the new allocation with the left neighbor.
|
|
*/
|
|
temp = left.br_blockcount + new->br_blockcount;
|
|
xfs_bmap_trace_pre_update(fname, "LC", ip, idx - 1,
|
|
XFS_DATA_FORK);
|
|
xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1), temp);
|
|
oldlen = STARTBLOCKVAL(left.br_startblock) +
|
|
STARTBLOCKVAL(new->br_startblock);
|
|
newlen = xfs_bmap_worst_indlen(ip, temp);
|
|
xfs_bmbt_set_startblock(xfs_iext_get_ext(ifp, idx - 1),
|
|
NULLSTARTBLOCK((int)newlen));
|
|
xfs_bmap_trace_post_update(fname, "LC", ip, idx - 1,
|
|
XFS_DATA_FORK);
|
|
ip->i_df.if_lastex = idx - 1;
|
|
/* DELTA: One in-core extent grew into a hole. */
|
|
temp2 = temp;
|
|
temp = left.br_startoff;
|
|
break;
|
|
|
|
case MASK(RIGHT_CONTIG):
|
|
/*
|
|
* New allocation is contiguous with a delayed allocation
|
|
* on the right.
|
|
* Merge the new allocation with the right neighbor.
|
|
*/
|
|
xfs_bmap_trace_pre_update(fname, "RC", ip, idx, XFS_DATA_FORK);
|
|
temp = new->br_blockcount + right.br_blockcount;
|
|
oldlen = STARTBLOCKVAL(new->br_startblock) +
|
|
STARTBLOCKVAL(right.br_startblock);
|
|
newlen = xfs_bmap_worst_indlen(ip, temp);
|
|
xfs_bmbt_set_allf(ep, new->br_startoff,
|
|
NULLSTARTBLOCK((int)newlen), temp, right.br_state);
|
|
xfs_bmap_trace_post_update(fname, "RC", ip, idx, XFS_DATA_FORK);
|
|
ip->i_df.if_lastex = idx;
|
|
/* DELTA: One in-core extent grew into a hole. */
|
|
temp2 = temp;
|
|
temp = new->br_startoff;
|
|
break;
|
|
|
|
case 0:
|
|
/*
|
|
* New allocation is not contiguous with another
|
|
* delayed allocation.
|
|
* Insert a new entry.
|
|
*/
|
|
oldlen = newlen = 0;
|
|
xfs_bmap_trace_insert(fname, "0", ip, idx, 1, new, NULL,
|
|
XFS_DATA_FORK);
|
|
xfs_iext_insert(ifp, idx, 1, new);
|
|
ip->i_df.if_lastex = idx;
|
|
/* DELTA: A new in-core extent was added in a hole. */
|
|
temp2 = new->br_blockcount;
|
|
temp = new->br_startoff;
|
|
break;
|
|
}
|
|
if (oldlen != newlen) {
|
|
ASSERT(oldlen > newlen);
|
|
xfs_mod_incore_sb(ip->i_mount, XFS_SBS_FDBLOCKS,
|
|
(int)(oldlen - newlen), rsvd);
|
|
/*
|
|
* Nothing to do for disk quota accounting here.
|
|
*/
|
|
}
|
|
if (delta) {
|
|
temp2 += temp;
|
|
if (delta->xed_startoff > temp)
|
|
delta->xed_startoff = temp;
|
|
if (delta->xed_blockcount < temp2)
|
|
delta->xed_blockcount = temp2;
|
|
}
|
|
*logflagsp = 0;
|
|
return 0;
|
|
#undef MASK
|
|
#undef MASK2
|
|
#undef STATE_SET
|
|
#undef STATE_TEST
|
|
#undef STATE_SET_TEST
|
|
#undef SWITCH_STATE
|
|
}
|
|
|
|
/*
|
|
* Called by xfs_bmap_add_extent to handle cases converting a hole
|
|
* to a real allocation.
|
|
*/
|
|
STATIC int /* error */
|
|
xfs_bmap_add_extent_hole_real(
|
|
xfs_inode_t *ip, /* incore inode pointer */
|
|
xfs_extnum_t idx, /* extent number to update/insert */
|
|
xfs_btree_cur_t *cur, /* if null, not a btree */
|
|
xfs_bmbt_irec_t *new, /* new data to add to file extents */
|
|
int *logflagsp, /* inode logging flags */
|
|
xfs_extdelta_t *delta, /* Change made to incore extents */
|
|
int whichfork) /* data or attr fork */
|
|
{
|
|
xfs_bmbt_rec_t *ep; /* pointer to extent entry ins. point */
|
|
int error; /* error return value */
|
|
#ifdef XFS_BMAP_TRACE
|
|
static char fname[] = "xfs_bmap_add_extent_hole_real";
|
|
#endif
|
|
int i; /* temp state */
|
|
xfs_ifork_t *ifp; /* inode fork pointer */
|
|
xfs_bmbt_irec_t left; /* left neighbor extent entry */
|
|
xfs_bmbt_irec_t right; /* right neighbor extent entry */
|
|
int rval=0; /* return value (logging flags) */
|
|
int state; /* state bits, accessed thru macros */
|
|
xfs_filblks_t temp=0;
|
|
xfs_filblks_t temp2=0;
|
|
enum { /* bit number definitions for state */
|
|
LEFT_CONTIG, RIGHT_CONTIG,
|
|
LEFT_DELAY, RIGHT_DELAY,
|
|
LEFT_VALID, RIGHT_VALID
|
|
};
|
|
|
|
#define MASK(b) (1 << (b))
|
|
#define MASK2(a,b) (MASK(a) | MASK(b))
|
|
#define STATE_SET(b,v) ((v) ? (state |= MASK(b)) : (state &= ~MASK(b)))
|
|
#define STATE_TEST(b) (state & MASK(b))
|
|
#define STATE_SET_TEST(b,v) ((v) ? ((state |= MASK(b)), 1) : \
|
|
((state &= ~MASK(b)), 0))
|
|
#define SWITCH_STATE (state & MASK2(LEFT_CONTIG, RIGHT_CONTIG))
|
|
|
|
ifp = XFS_IFORK_PTR(ip, whichfork);
|
|
ASSERT(idx <= ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t));
|
|
ep = xfs_iext_get_ext(ifp, idx);
|
|
state = 0;
|
|
/*
|
|
* Check and set flags if this segment has a left neighbor.
|
|
*/
|
|
if (STATE_SET_TEST(LEFT_VALID, idx > 0)) {
|
|
xfs_bmbt_get_all(xfs_iext_get_ext(ifp, idx - 1), &left);
|
|
STATE_SET(LEFT_DELAY, ISNULLSTARTBLOCK(left.br_startblock));
|
|
}
|
|
/*
|
|
* Check and set flags if this segment has a current value.
|
|
* Not true if we're inserting into the "hole" at eof.
|
|
*/
|
|
if (STATE_SET_TEST(RIGHT_VALID,
|
|
idx <
|
|
ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t))) {
|
|
xfs_bmbt_get_all(ep, &right);
|
|
STATE_SET(RIGHT_DELAY, ISNULLSTARTBLOCK(right.br_startblock));
|
|
}
|
|
/*
|
|
* We're inserting a real allocation between "left" and "right".
|
|
* Set the contiguity flags. Don't let extents get too large.
|
|
*/
|
|
STATE_SET(LEFT_CONTIG,
|
|
STATE_TEST(LEFT_VALID) && !STATE_TEST(LEFT_DELAY) &&
|
|
left.br_startoff + left.br_blockcount == new->br_startoff &&
|
|
left.br_startblock + left.br_blockcount == new->br_startblock &&
|
|
left.br_state == new->br_state &&
|
|
left.br_blockcount + new->br_blockcount <= MAXEXTLEN);
|
|
STATE_SET(RIGHT_CONTIG,
|
|
STATE_TEST(RIGHT_VALID) && !STATE_TEST(RIGHT_DELAY) &&
|
|
new->br_startoff + new->br_blockcount == right.br_startoff &&
|
|
new->br_startblock + new->br_blockcount ==
|
|
right.br_startblock &&
|
|
new->br_state == right.br_state &&
|
|
new->br_blockcount + right.br_blockcount <= MAXEXTLEN &&
|
|
(!STATE_TEST(LEFT_CONTIG) ||
|
|
left.br_blockcount + new->br_blockcount +
|
|
right.br_blockcount <= MAXEXTLEN));
|
|
|
|
error = 0;
|
|
/*
|
|
* Select which case we're in here, and implement it.
|
|
*/
|
|
switch (SWITCH_STATE) {
|
|
|
|
case MASK2(LEFT_CONTIG, RIGHT_CONTIG):
|
|
/*
|
|
* New allocation is contiguous with real allocations on the
|
|
* left and on the right.
|
|
* Merge all three into a single extent record.
|
|
*/
|
|
xfs_bmap_trace_pre_update(fname, "LC|RC", ip, idx - 1,
|
|
whichfork);
|
|
xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1),
|
|
left.br_blockcount + new->br_blockcount +
|
|
right.br_blockcount);
|
|
xfs_bmap_trace_post_update(fname, "LC|RC", ip, idx - 1,
|
|
whichfork);
|
|
xfs_bmap_trace_delete(fname, "LC|RC", ip,
|
|
idx, 1, whichfork);
|
|
xfs_iext_remove(ifp, idx, 1);
|
|
ifp->if_lastex = idx - 1;
|
|
XFS_IFORK_NEXT_SET(ip, whichfork,
|
|
XFS_IFORK_NEXTENTS(ip, whichfork) - 1);
|
|
if (cur == NULL) {
|
|
rval = XFS_ILOG_CORE | XFS_ILOG_FEXT(whichfork);
|
|
} else {
|
|
rval = XFS_ILOG_CORE;
|
|
if ((error = xfs_bmbt_lookup_eq(cur,
|
|
right.br_startoff,
|
|
right.br_startblock,
|
|
right.br_blockcount, &i)))
|
|
goto done;
|
|
ASSERT(i == 1);
|
|
if ((error = xfs_bmbt_delete(cur, &i)))
|
|
goto done;
|
|
ASSERT(i == 1);
|
|
if ((error = xfs_bmbt_decrement(cur, 0, &i)))
|
|
goto done;
|
|
ASSERT(i == 1);
|
|
if ((error = xfs_bmbt_update(cur, left.br_startoff,
|
|
left.br_startblock,
|
|
left.br_blockcount +
|
|
new->br_blockcount +
|
|
right.br_blockcount,
|
|
left.br_state)))
|
|
goto done;
|
|
}
|
|
/* DELTA: Two in-core extents were replaced by one. */
|
|
temp = left.br_startoff;
|
|
temp2 = left.br_blockcount +
|
|
new->br_blockcount +
|
|
right.br_blockcount;
|
|
break;
|
|
|
|
case MASK(LEFT_CONTIG):
|
|
/*
|
|
* New allocation is contiguous with a real allocation
|
|
* on the left.
|
|
* Merge the new allocation with the left neighbor.
|
|
*/
|
|
xfs_bmap_trace_pre_update(fname, "LC", ip, idx - 1, whichfork);
|
|
xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1),
|
|
left.br_blockcount + new->br_blockcount);
|
|
xfs_bmap_trace_post_update(fname, "LC", ip, idx - 1, whichfork);
|
|
ifp->if_lastex = idx - 1;
|
|
if (cur == NULL) {
|
|
rval = XFS_ILOG_FEXT(whichfork);
|
|
} else {
|
|
rval = 0;
|
|
if ((error = xfs_bmbt_lookup_eq(cur,
|
|
left.br_startoff,
|
|
left.br_startblock,
|
|
left.br_blockcount, &i)))
|
|
goto done;
|
|
ASSERT(i == 1);
|
|
if ((error = xfs_bmbt_update(cur, left.br_startoff,
|
|
left.br_startblock,
|
|
left.br_blockcount +
|
|
new->br_blockcount,
|
|
left.br_state)))
|
|
goto done;
|
|
}
|
|
/* DELTA: One in-core extent grew. */
|
|
temp = left.br_startoff;
|
|
temp2 = left.br_blockcount +
|
|
new->br_blockcount;
|
|
break;
|
|
|
|
case MASK(RIGHT_CONTIG):
|
|
/*
|
|
* New allocation is contiguous with a real allocation
|
|
* on the right.
|
|
* Merge the new allocation with the right neighbor.
|
|
*/
|
|
xfs_bmap_trace_pre_update(fname, "RC", ip, idx, whichfork);
|
|
xfs_bmbt_set_allf(ep, new->br_startoff, new->br_startblock,
|
|
new->br_blockcount + right.br_blockcount,
|
|
right.br_state);
|
|
xfs_bmap_trace_post_update(fname, "RC", ip, idx, whichfork);
|
|
ifp->if_lastex = idx;
|
|
if (cur == NULL) {
|
|
rval = XFS_ILOG_FEXT(whichfork);
|
|
} else {
|
|
rval = 0;
|
|
if ((error = xfs_bmbt_lookup_eq(cur,
|
|
right.br_startoff,
|
|
right.br_startblock,
|
|
right.br_blockcount, &i)))
|
|
goto done;
|
|
ASSERT(i == 1);
|
|
if ((error = xfs_bmbt_update(cur, new->br_startoff,
|
|
new->br_startblock,
|
|
new->br_blockcount +
|
|
right.br_blockcount,
|
|
right.br_state)))
|
|
goto done;
|
|
}
|
|
/* DELTA: One in-core extent grew. */
|
|
temp = new->br_startoff;
|
|
temp2 = new->br_blockcount +
|
|
right.br_blockcount;
|
|
break;
|
|
|
|
case 0:
|
|
/*
|
|
* New allocation is not contiguous with another
|
|
* real allocation.
|
|
* Insert a new entry.
|
|
*/
|
|
xfs_bmap_trace_insert(fname, "0", ip, idx, 1, new, NULL,
|
|
whichfork);
|
|
xfs_iext_insert(ifp, idx, 1, new);
|
|
ifp->if_lastex = idx;
|
|
XFS_IFORK_NEXT_SET(ip, whichfork,
|
|
XFS_IFORK_NEXTENTS(ip, whichfork) + 1);
|
|
if (cur == NULL) {
|
|
rval = XFS_ILOG_CORE | XFS_ILOG_FEXT(whichfork);
|
|
} else {
|
|
rval = XFS_ILOG_CORE;
|
|
if ((error = xfs_bmbt_lookup_eq(cur,
|
|
new->br_startoff,
|
|
new->br_startblock,
|
|
new->br_blockcount, &i)))
|
|
goto done;
|
|
ASSERT(i == 0);
|
|
cur->bc_rec.b.br_state = new->br_state;
|
|
if ((error = xfs_bmbt_insert(cur, &i)))
|
|
goto done;
|
|
ASSERT(i == 1);
|
|
}
|
|
/* DELTA: A new extent was added in a hole. */
|
|
temp = new->br_startoff;
|
|
temp2 = new->br_blockcount;
|
|
break;
|
|
}
|
|
if (delta) {
|
|
temp2 += temp;
|
|
if (delta->xed_startoff > temp)
|
|
delta->xed_startoff = temp;
|
|
if (delta->xed_blockcount < temp2)
|
|
delta->xed_blockcount = temp2;
|
|
}
|
|
done:
|
|
*logflagsp = rval;
|
|
return error;
|
|
#undef MASK
|
|
#undef MASK2
|
|
#undef STATE_SET
|
|
#undef STATE_TEST
|
|
#undef STATE_SET_TEST
|
|
#undef SWITCH_STATE
|
|
}
|
|
|
|
/*
|
|
* Adjust the size of the new extent based on di_extsize and rt extsize.
|
|
*/
|
|
STATIC int
|
|
xfs_bmap_extsize_align(
|
|
xfs_mount_t *mp,
|
|
xfs_bmbt_irec_t *gotp, /* next extent pointer */
|
|
xfs_bmbt_irec_t *prevp, /* previous extent pointer */
|
|
xfs_extlen_t extsz, /* align to this extent size */
|
|
int rt, /* is this a realtime inode? */
|
|
int eof, /* is extent at end-of-file? */
|
|
int delay, /* creating delalloc extent? */
|
|
int convert, /* overwriting unwritten extent? */
|
|
xfs_fileoff_t *offp, /* in/out: aligned offset */
|
|
xfs_extlen_t *lenp) /* in/out: aligned length */
|
|
{
|
|
xfs_fileoff_t orig_off; /* original offset */
|
|
xfs_extlen_t orig_alen; /* original length */
|
|
xfs_fileoff_t orig_end; /* original off+len */
|
|
xfs_fileoff_t nexto; /* next file offset */
|
|
xfs_fileoff_t prevo; /* previous file offset */
|
|
xfs_fileoff_t align_off; /* temp for offset */
|
|
xfs_extlen_t align_alen; /* temp for length */
|
|
xfs_extlen_t temp; /* temp for calculations */
|
|
|
|
if (convert)
|
|
return 0;
|
|
|
|
orig_off = align_off = *offp;
|
|
orig_alen = align_alen = *lenp;
|
|
orig_end = orig_off + orig_alen;
|
|
|
|
/*
|
|
* If this request overlaps an existing extent, then don't
|
|
* attempt to perform any additional alignment.
|
|
*/
|
|
if (!delay && !eof &&
|
|
(orig_off >= gotp->br_startoff) &&
|
|
(orig_end <= gotp->br_startoff + gotp->br_blockcount)) {
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* If the file offset is unaligned vs. the extent size
|
|
* we need to align it. This will be possible unless
|
|
* the file was previously written with a kernel that didn't
|
|
* perform this alignment, or if a truncate shot us in the
|
|
* foot.
|
|
*/
|
|
temp = do_mod(orig_off, extsz);
|
|
if (temp) {
|
|
align_alen += temp;
|
|
align_off -= temp;
|
|
}
|
|
/*
|
|
* Same adjustment for the end of the requested area.
|
|
*/
|
|
if ((temp = (align_alen % extsz))) {
|
|
align_alen += extsz - temp;
|
|
}
|
|
/*
|
|
* If the previous block overlaps with this proposed allocation
|
|
* then move the start forward without adjusting the length.
|
|
*/
|
|
if (prevp->br_startoff != NULLFILEOFF) {
|
|
if (prevp->br_startblock == HOLESTARTBLOCK)
|
|
prevo = prevp->br_startoff;
|
|
else
|
|
prevo = prevp->br_startoff + prevp->br_blockcount;
|
|
} else
|
|
prevo = 0;
|
|
if (align_off != orig_off && align_off < prevo)
|
|
align_off = prevo;
|
|
/*
|
|
* If the next block overlaps with this proposed allocation
|
|
* then move the start back without adjusting the length,
|
|
* but not before offset 0.
|
|
* This may of course make the start overlap previous block,
|
|
* and if we hit the offset 0 limit then the next block
|
|
* can still overlap too.
|
|
*/
|
|
if (!eof && gotp->br_startoff != NULLFILEOFF) {
|
|
if ((delay && gotp->br_startblock == HOLESTARTBLOCK) ||
|
|
(!delay && gotp->br_startblock == DELAYSTARTBLOCK))
|
|
nexto = gotp->br_startoff + gotp->br_blockcount;
|
|
else
|
|
nexto = gotp->br_startoff;
|
|
} else
|
|
nexto = NULLFILEOFF;
|
|
if (!eof &&
|
|
align_off + align_alen != orig_end &&
|
|
align_off + align_alen > nexto)
|
|
align_off = nexto > align_alen ? nexto - align_alen : 0;
|
|
/*
|
|
* If we're now overlapping the next or previous extent that
|
|
* means we can't fit an extsz piece in this hole. Just move
|
|
* the start forward to the first valid spot and set
|
|
* the length so we hit the end.
|
|
*/
|
|
if (align_off != orig_off && align_off < prevo)
|
|
align_off = prevo;
|
|
if (align_off + align_alen != orig_end &&
|
|
align_off + align_alen > nexto &&
|
|
nexto != NULLFILEOFF) {
|
|
ASSERT(nexto > prevo);
|
|
align_alen = nexto - align_off;
|
|
}
|
|
|
|
/*
|
|
* If realtime, and the result isn't a multiple of the realtime
|
|
* extent size we need to remove blocks until it is.
|
|
*/
|
|
if (rt && (temp = (align_alen % mp->m_sb.sb_rextsize))) {
|
|
/*
|
|
* We're not covering the original request, or
|
|
* we won't be able to once we fix the length.
|
|
*/
|
|
if (orig_off < align_off ||
|
|
orig_end > align_off + align_alen ||
|
|
align_alen - temp < orig_alen)
|
|
return XFS_ERROR(EINVAL);
|
|
/*
|
|
* Try to fix it by moving the start up.
|
|
*/
|
|
if (align_off + temp <= orig_off) {
|
|
align_alen -= temp;
|
|
align_off += temp;
|
|
}
|
|
/*
|
|
* Try to fix it by moving the end in.
|
|
*/
|
|
else if (align_off + align_alen - temp >= orig_end)
|
|
align_alen -= temp;
|
|
/*
|
|
* Set the start to the minimum then trim the length.
|
|
*/
|
|
else {
|
|
align_alen -= orig_off - align_off;
|
|
align_off = orig_off;
|
|
align_alen -= align_alen % mp->m_sb.sb_rextsize;
|
|
}
|
|
/*
|
|
* Result doesn't cover the request, fail it.
|
|
*/
|
|
if (orig_off < align_off || orig_end > align_off + align_alen)
|
|
return XFS_ERROR(EINVAL);
|
|
} else {
|
|
ASSERT(orig_off >= align_off);
|
|
ASSERT(orig_end <= align_off + align_alen);
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
if (!eof && gotp->br_startoff != NULLFILEOFF)
|
|
ASSERT(align_off + align_alen <= gotp->br_startoff);
|
|
if (prevp->br_startoff != NULLFILEOFF)
|
|
ASSERT(align_off >= prevp->br_startoff + prevp->br_blockcount);
|
|
#endif
|
|
|
|
*lenp = align_alen;
|
|
*offp = align_off;
|
|
return 0;
|
|
}
|
|
|
|
#define XFS_ALLOC_GAP_UNITS 4
|
|
|
|
STATIC int
|
|
xfs_bmap_adjacent(
|
|
xfs_bmalloca_t *ap) /* bmap alloc argument struct */
|
|
{
|
|
xfs_fsblock_t adjust; /* adjustment to block numbers */
|
|
xfs_agnumber_t fb_agno; /* ag number of ap->firstblock */
|
|
xfs_mount_t *mp; /* mount point structure */
|
|
int nullfb; /* true if ap->firstblock isn't set */
|
|
int rt; /* true if inode is realtime */
|
|
|
|
#define ISVALID(x,y) \
|
|
(rt ? \
|
|
(x) < mp->m_sb.sb_rblocks : \
|
|
XFS_FSB_TO_AGNO(mp, x) == XFS_FSB_TO_AGNO(mp, y) && \
|
|
XFS_FSB_TO_AGNO(mp, x) < mp->m_sb.sb_agcount && \
|
|
XFS_FSB_TO_AGBNO(mp, x) < mp->m_sb.sb_agblocks)
|
|
|
|
mp = ap->ip->i_mount;
|
|
nullfb = ap->firstblock == NULLFSBLOCK;
|
|
rt = XFS_IS_REALTIME_INODE(ap->ip) && ap->userdata;
|
|
fb_agno = nullfb ? NULLAGNUMBER : XFS_FSB_TO_AGNO(mp, ap->firstblock);
|
|
/*
|
|
* If allocating at eof, and there's a previous real block,
|
|
* try to use it's last block as our starting point.
|
|
*/
|
|
if (ap->eof && ap->prevp->br_startoff != NULLFILEOFF &&
|
|
!ISNULLSTARTBLOCK(ap->prevp->br_startblock) &&
|
|
ISVALID(ap->prevp->br_startblock + ap->prevp->br_blockcount,
|
|
ap->prevp->br_startblock)) {
|
|
ap->rval = ap->prevp->br_startblock + ap->prevp->br_blockcount;
|
|
/*
|
|
* Adjust for the gap between prevp and us.
|
|
*/
|
|
adjust = ap->off -
|
|
(ap->prevp->br_startoff + ap->prevp->br_blockcount);
|
|
if (adjust &&
|
|
ISVALID(ap->rval + adjust, ap->prevp->br_startblock))
|
|
ap->rval += adjust;
|
|
}
|
|
/*
|
|
* If not at eof, then compare the two neighbor blocks.
|
|
* Figure out whether either one gives us a good starting point,
|
|
* and pick the better one.
|
|
*/
|
|
else if (!ap->eof) {
|
|
xfs_fsblock_t gotbno; /* right side block number */
|
|
xfs_fsblock_t gotdiff=0; /* right side difference */
|
|
xfs_fsblock_t prevbno; /* left side block number */
|
|
xfs_fsblock_t prevdiff=0; /* left side difference */
|
|
|
|
/*
|
|
* If there's a previous (left) block, select a requested
|
|
* start block based on it.
|
|
*/
|
|
if (ap->prevp->br_startoff != NULLFILEOFF &&
|
|
!ISNULLSTARTBLOCK(ap->prevp->br_startblock) &&
|
|
(prevbno = ap->prevp->br_startblock +
|
|
ap->prevp->br_blockcount) &&
|
|
ISVALID(prevbno, ap->prevp->br_startblock)) {
|
|
/*
|
|
* Calculate gap to end of previous block.
|
|
*/
|
|
adjust = prevdiff = ap->off -
|
|
(ap->prevp->br_startoff +
|
|
ap->prevp->br_blockcount);
|
|
/*
|
|
* Figure the startblock based on the previous block's
|
|
* end and the gap size.
|
|
* Heuristic!
|
|
* If the gap is large relative to the piece we're
|
|
* allocating, or using it gives us an invalid block
|
|
* number, then just use the end of the previous block.
|
|
*/
|
|
if (prevdiff <= XFS_ALLOC_GAP_UNITS * ap->alen &&
|
|
ISVALID(prevbno + prevdiff,
|
|
ap->prevp->br_startblock))
|
|
prevbno += adjust;
|
|
else
|
|
prevdiff += adjust;
|
|
/*
|
|
* If the firstblock forbids it, can't use it,
|
|
* must use default.
|
|
*/
|
|
if (!rt && !nullfb &&
|
|
XFS_FSB_TO_AGNO(mp, prevbno) != fb_agno)
|
|
prevbno = NULLFSBLOCK;
|
|
}
|
|
/*
|
|
* No previous block or can't follow it, just default.
|
|
*/
|
|
else
|
|
prevbno = NULLFSBLOCK;
|
|
/*
|
|
* If there's a following (right) block, select a requested
|
|
* start block based on it.
|
|
*/
|
|
if (!ISNULLSTARTBLOCK(ap->gotp->br_startblock)) {
|
|
/*
|
|
* Calculate gap to start of next block.
|
|
*/
|
|
adjust = gotdiff = ap->gotp->br_startoff - ap->off;
|
|
/*
|
|
* Figure the startblock based on the next block's
|
|
* start and the gap size.
|
|
*/
|
|
gotbno = ap->gotp->br_startblock;
|
|
/*
|
|
* Heuristic!
|
|
* If the gap is large relative to the piece we're
|
|
* allocating, or using it gives us an invalid block
|
|
* number, then just use the start of the next block
|
|
* offset by our length.
|
|
*/
|
|
if (gotdiff <= XFS_ALLOC_GAP_UNITS * ap->alen &&
|
|
ISVALID(gotbno - gotdiff, gotbno))
|
|
gotbno -= adjust;
|
|
else if (ISVALID(gotbno - ap->alen, gotbno)) {
|
|
gotbno -= ap->alen;
|
|
gotdiff += adjust - ap->alen;
|
|
} else
|
|
gotdiff += adjust;
|
|
/*
|
|
* If the firstblock forbids it, can't use it,
|
|
* must use default.
|
|
*/
|
|
if (!rt && !nullfb &&
|
|
XFS_FSB_TO_AGNO(mp, gotbno) != fb_agno)
|
|
gotbno = NULLFSBLOCK;
|
|
}
|
|
/*
|
|
* No next block, just default.
|
|
*/
|
|
else
|
|
gotbno = NULLFSBLOCK;
|
|
/*
|
|
* If both valid, pick the better one, else the only good
|
|
* one, else ap->rval is already set (to 0 or the inode block).
|
|
*/
|
|
if (prevbno != NULLFSBLOCK && gotbno != NULLFSBLOCK)
|
|
ap->rval = prevdiff <= gotdiff ? prevbno : gotbno;
|
|
else if (prevbno != NULLFSBLOCK)
|
|
ap->rval = prevbno;
|
|
else if (gotbno != NULLFSBLOCK)
|
|
ap->rval = gotbno;
|
|
}
|
|
#undef ISVALID
|
|
return 0;
|
|
}
|
|
|
|
STATIC int
|
|
xfs_bmap_rtalloc(
|
|
xfs_bmalloca_t *ap) /* bmap alloc argument struct */
|
|
{
|
|
xfs_alloctype_t atype = 0; /* type for allocation routines */
|
|
int error; /* error return value */
|
|
xfs_mount_t *mp; /* mount point structure */
|
|
xfs_extlen_t prod = 0; /* product factor for allocators */
|
|
xfs_extlen_t ralen = 0; /* realtime allocation length */
|
|
xfs_extlen_t align; /* minimum allocation alignment */
|
|
xfs_rtblock_t rtx; /* realtime extent number */
|
|
xfs_rtblock_t rtb;
|
|
|
|
mp = ap->ip->i_mount;
|
|
align = ap->ip->i_d.di_extsize ?
|
|
ap->ip->i_d.di_extsize : mp->m_sb.sb_rextsize;
|
|
prod = align / mp->m_sb.sb_rextsize;
|
|
error = xfs_bmap_extsize_align(mp, ap->gotp, ap->prevp,
|
|
align, 1, ap->eof, 0,
|
|
ap->conv, &ap->off, &ap->alen);
|
|
if (error)
|
|
return error;
|
|
ASSERT(ap->alen);
|
|
ASSERT(ap->alen % mp->m_sb.sb_rextsize == 0);
|
|
|
|
/*
|
|
* If the offset & length are not perfectly aligned
|
|
* then kill prod, it will just get us in trouble.
|
|
*/
|
|
if (do_mod(ap->off, align) || ap->alen % align)
|
|
prod = 1;
|
|
/*
|
|
* Set ralen to be the actual requested length in rtextents.
|
|
*/
|
|
ralen = ap->alen / mp->m_sb.sb_rextsize;
|
|
/*
|
|
* If the old value was close enough to MAXEXTLEN that
|
|
* we rounded up to it, cut it back so it's valid again.
|
|
* Note that if it's a really large request (bigger than
|
|
* MAXEXTLEN), we don't hear about that number, and can't
|
|
* adjust the starting point to match it.
|
|
*/
|
|
if (ralen * mp->m_sb.sb_rextsize >= MAXEXTLEN)
|
|
ralen = MAXEXTLEN / mp->m_sb.sb_rextsize;
|
|
/*
|
|
* If it's an allocation to an empty file at offset 0,
|
|
* pick an extent that will space things out in the rt area.
|
|
*/
|
|
if (ap->eof && ap->off == 0) {
|
|
error = xfs_rtpick_extent(mp, ap->tp, ralen, &rtx);
|
|
if (error)
|
|
return error;
|
|
ap->rval = rtx * mp->m_sb.sb_rextsize;
|
|
} else {
|
|
ap->rval = 0;
|
|
}
|
|
|
|
xfs_bmap_adjacent(ap);
|
|
|
|
/*
|
|
* Realtime allocation, done through xfs_rtallocate_extent.
|
|
*/
|
|
atype = ap->rval == 0 ? XFS_ALLOCTYPE_ANY_AG : XFS_ALLOCTYPE_NEAR_BNO;
|
|
do_div(ap->rval, mp->m_sb.sb_rextsize);
|
|
rtb = ap->rval;
|
|
ap->alen = ralen;
|
|
if ((error = xfs_rtallocate_extent(ap->tp, ap->rval, 1, ap->alen,
|
|
&ralen, atype, ap->wasdel, prod, &rtb)))
|
|
return error;
|
|
if (rtb == NULLFSBLOCK && prod > 1 &&
|
|
(error = xfs_rtallocate_extent(ap->tp, ap->rval, 1,
|
|
ap->alen, &ralen, atype,
|
|
ap->wasdel, 1, &rtb)))
|
|
return error;
|
|
ap->rval = rtb;
|
|
if (ap->rval != NULLFSBLOCK) {
|
|
ap->rval *= mp->m_sb.sb_rextsize;
|
|
ralen *= mp->m_sb.sb_rextsize;
|
|
ap->alen = ralen;
|
|
ap->ip->i_d.di_nblocks += ralen;
|
|
xfs_trans_log_inode(ap->tp, ap->ip, XFS_ILOG_CORE);
|
|
if (ap->wasdel)
|
|
ap->ip->i_delayed_blks -= ralen;
|
|
/*
|
|
* Adjust the disk quota also. This was reserved
|
|
* earlier.
|
|
*/
|
|
XFS_TRANS_MOD_DQUOT_BYINO(mp, ap->tp, ap->ip,
|
|
ap->wasdel ? XFS_TRANS_DQ_DELRTBCOUNT :
|
|
XFS_TRANS_DQ_RTBCOUNT, (long) ralen);
|
|
} else {
|
|
ap->alen = 0;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
STATIC int
|
|
xfs_bmap_btalloc(
|
|
xfs_bmalloca_t *ap) /* bmap alloc argument struct */
|
|
{
|
|
xfs_mount_t *mp; /* mount point structure */
|
|
xfs_alloctype_t atype = 0; /* type for allocation routines */
|
|
xfs_extlen_t align; /* minimum allocation alignment */
|
|
xfs_agnumber_t ag;
|
|
xfs_agnumber_t fb_agno; /* ag number of ap->firstblock */
|
|
xfs_agnumber_t startag;
|
|
xfs_alloc_arg_t args;
|
|
xfs_extlen_t blen;
|
|
xfs_extlen_t delta;
|
|
xfs_extlen_t longest;
|
|
xfs_extlen_t need;
|
|
xfs_extlen_t nextminlen = 0;
|
|
xfs_perag_t *pag;
|
|
int nullfb; /* true if ap->firstblock isn't set */
|
|
int isaligned;
|
|
int notinit;
|
|
int tryagain;
|
|
int error;
|
|
|
|
mp = ap->ip->i_mount;
|
|
align = (ap->userdata && ap->ip->i_d.di_extsize &&
|
|
(ap->ip->i_d.di_flags & XFS_DIFLAG_EXTSIZE)) ?
|
|
ap->ip->i_d.di_extsize : 0;
|
|
if (unlikely(align)) {
|
|
error = xfs_bmap_extsize_align(mp, ap->gotp, ap->prevp,
|
|
align, 0, ap->eof, 0, ap->conv,
|
|
&ap->off, &ap->alen);
|
|
ASSERT(!error);
|
|
ASSERT(ap->alen);
|
|
}
|
|
nullfb = ap->firstblock == NULLFSBLOCK;
|
|
fb_agno = nullfb ? NULLAGNUMBER : XFS_FSB_TO_AGNO(mp, ap->firstblock);
|
|
if (nullfb)
|
|
ap->rval = XFS_INO_TO_FSB(mp, ap->ip->i_ino);
|
|
else
|
|
ap->rval = ap->firstblock;
|
|
|
|
xfs_bmap_adjacent(ap);
|
|
|
|
/*
|
|
* If allowed, use ap->rval; otherwise must use firstblock since
|
|
* it's in the right allocation group.
|
|
*/
|
|
if (nullfb || XFS_FSB_TO_AGNO(mp, ap->rval) == fb_agno)
|
|
;
|
|
else
|
|
ap->rval = ap->firstblock;
|
|
/*
|
|
* Normal allocation, done through xfs_alloc_vextent.
|
|
*/
|
|
tryagain = isaligned = 0;
|
|
args.tp = ap->tp;
|
|
args.mp = mp;
|
|
args.fsbno = ap->rval;
|
|
args.maxlen = MIN(ap->alen, mp->m_sb.sb_agblocks);
|
|
args.firstblock = ap->firstblock;
|
|
blen = 0;
|
|
if (nullfb) {
|
|
args.type = XFS_ALLOCTYPE_START_BNO;
|
|
args.total = ap->total;
|
|
/*
|
|
* Find the longest available space.
|
|
* We're going to try for the whole allocation at once.
|
|
*/
|
|
startag = ag = XFS_FSB_TO_AGNO(mp, args.fsbno);
|
|
notinit = 0;
|
|
down_read(&mp->m_peraglock);
|
|
while (blen < ap->alen) {
|
|
pag = &mp->m_perag[ag];
|
|
if (!pag->pagf_init &&
|
|
(error = xfs_alloc_pagf_init(mp, args.tp,
|
|
ag, XFS_ALLOC_FLAG_TRYLOCK))) {
|
|
up_read(&mp->m_peraglock);
|
|
return error;
|
|
}
|
|
/*
|
|
* See xfs_alloc_fix_freelist...
|
|
*/
|
|
if (pag->pagf_init) {
|
|
need = XFS_MIN_FREELIST_PAG(pag, mp);
|
|
delta = need > pag->pagf_flcount ?
|
|
need - pag->pagf_flcount : 0;
|
|
longest = (pag->pagf_longest > delta) ?
|
|
(pag->pagf_longest - delta) :
|
|
(pag->pagf_flcount > 0 ||
|
|
pag->pagf_longest > 0);
|
|
if (blen < longest)
|
|
blen = longest;
|
|
} else
|
|
notinit = 1;
|
|
if (++ag == mp->m_sb.sb_agcount)
|
|
ag = 0;
|
|
if (ag == startag)
|
|
break;
|
|
}
|
|
up_read(&mp->m_peraglock);
|
|
/*
|
|
* Since the above loop did a BUF_TRYLOCK, it is
|
|
* possible that there is space for this request.
|
|
*/
|
|
if (notinit || blen < ap->minlen)
|
|
args.minlen = ap->minlen;
|
|
/*
|
|
* If the best seen length is less than the request
|
|
* length, use the best as the minimum.
|
|
*/
|
|
else if (blen < ap->alen)
|
|
args.minlen = blen;
|
|
/*
|
|
* Otherwise we've seen an extent as big as alen,
|
|
* use that as the minimum.
|
|
*/
|
|
else
|
|
args.minlen = ap->alen;
|
|
} else if (ap->low) {
|
|
args.type = XFS_ALLOCTYPE_START_BNO;
|
|
args.total = args.minlen = ap->minlen;
|
|
} else {
|
|
args.type = XFS_ALLOCTYPE_NEAR_BNO;
|
|
args.total = ap->total;
|
|
args.minlen = ap->minlen;
|
|
}
|
|
if (unlikely(ap->userdata && ap->ip->i_d.di_extsize &&
|
|
(ap->ip->i_d.di_flags & XFS_DIFLAG_EXTSIZE))) {
|
|
args.prod = ap->ip->i_d.di_extsize;
|
|
if ((args.mod = (xfs_extlen_t)do_mod(ap->off, args.prod)))
|
|
args.mod = (xfs_extlen_t)(args.prod - args.mod);
|
|
} else if (mp->m_sb.sb_blocksize >= NBPP) {
|
|
args.prod = 1;
|
|
args.mod = 0;
|
|
} else {
|
|
args.prod = NBPP >> mp->m_sb.sb_blocklog;
|
|
if ((args.mod = (xfs_extlen_t)(do_mod(ap->off, args.prod))))
|
|
args.mod = (xfs_extlen_t)(args.prod - args.mod);
|
|
}
|
|
/*
|
|
* If we are not low on available data blocks, and the
|
|
* underlying logical volume manager is a stripe, and
|
|
* the file offset is zero then try to allocate data
|
|
* blocks on stripe unit boundary.
|
|
* NOTE: ap->aeof is only set if the allocation length
|
|
* is >= the stripe unit and the allocation offset is
|
|
* at the end of file.
|
|
*/
|
|
if (!ap->low && ap->aeof) {
|
|
if (!ap->off) {
|
|
args.alignment = mp->m_dalign;
|
|
atype = args.type;
|
|
isaligned = 1;
|
|
/*
|
|
* Adjust for alignment
|
|
*/
|
|
if (blen > args.alignment && blen <= ap->alen)
|
|
args.minlen = blen - args.alignment;
|
|
args.minalignslop = 0;
|
|
} else {
|
|
/*
|
|
* First try an exact bno allocation.
|
|
* If it fails then do a near or start bno
|
|
* allocation with alignment turned on.
|
|
*/
|
|
atype = args.type;
|
|
tryagain = 1;
|
|
args.type = XFS_ALLOCTYPE_THIS_BNO;
|
|
args.alignment = 1;
|
|
/*
|
|
* Compute the minlen+alignment for the
|
|
* next case. Set slop so that the value
|
|
* of minlen+alignment+slop doesn't go up
|
|
* between the calls.
|
|
*/
|
|
if (blen > mp->m_dalign && blen <= ap->alen)
|
|
nextminlen = blen - mp->m_dalign;
|
|
else
|
|
nextminlen = args.minlen;
|
|
if (nextminlen + mp->m_dalign > args.minlen + 1)
|
|
args.minalignslop =
|
|
nextminlen + mp->m_dalign -
|
|
args.minlen - 1;
|
|
else
|
|
args.minalignslop = 0;
|
|
}
|
|
} else {
|
|
args.alignment = 1;
|
|
args.minalignslop = 0;
|
|
}
|
|
args.minleft = ap->minleft;
|
|
args.wasdel = ap->wasdel;
|
|
args.isfl = 0;
|
|
args.userdata = ap->userdata;
|
|
if ((error = xfs_alloc_vextent(&args)))
|
|
return error;
|
|
if (tryagain && args.fsbno == NULLFSBLOCK) {
|
|
/*
|
|
* Exact allocation failed. Now try with alignment
|
|
* turned on.
|
|
*/
|
|
args.type = atype;
|
|
args.fsbno = ap->rval;
|
|
args.alignment = mp->m_dalign;
|
|
args.minlen = nextminlen;
|
|
args.minalignslop = 0;
|
|
isaligned = 1;
|
|
if ((error = xfs_alloc_vextent(&args)))
|
|
return error;
|
|
}
|
|
if (isaligned && args.fsbno == NULLFSBLOCK) {
|
|
/*
|
|
* allocation failed, so turn off alignment and
|
|
* try again.
|
|
*/
|
|
args.type = atype;
|
|
args.fsbno = ap->rval;
|
|
args.alignment = 0;
|
|
if ((error = xfs_alloc_vextent(&args)))
|
|
return error;
|
|
}
|
|
if (args.fsbno == NULLFSBLOCK && nullfb &&
|
|
args.minlen > ap->minlen) {
|
|
args.minlen = ap->minlen;
|
|
args.type = XFS_ALLOCTYPE_START_BNO;
|
|
args.fsbno = ap->rval;
|
|
if ((error = xfs_alloc_vextent(&args)))
|
|
return error;
|
|
}
|
|
if (args.fsbno == NULLFSBLOCK && nullfb) {
|
|
args.fsbno = 0;
|
|
args.type = XFS_ALLOCTYPE_FIRST_AG;
|
|
args.total = ap->minlen;
|
|
args.minleft = 0;
|
|
if ((error = xfs_alloc_vextent(&args)))
|
|
return error;
|
|
ap->low = 1;
|
|
}
|
|
if (args.fsbno != NULLFSBLOCK) {
|
|
ap->firstblock = ap->rval = args.fsbno;
|
|
ASSERT(nullfb || fb_agno == args.agno ||
|
|
(ap->low && fb_agno < args.agno));
|
|
ap->alen = args.len;
|
|
ap->ip->i_d.di_nblocks += args.len;
|
|
xfs_trans_log_inode(ap->tp, ap->ip, XFS_ILOG_CORE);
|
|
if (ap->wasdel)
|
|
ap->ip->i_delayed_blks -= args.len;
|
|
/*
|
|
* Adjust the disk quota also. This was reserved
|
|
* earlier.
|
|
*/
|
|
XFS_TRANS_MOD_DQUOT_BYINO(mp, ap->tp, ap->ip,
|
|
ap->wasdel ? XFS_TRANS_DQ_DELBCOUNT :
|
|
XFS_TRANS_DQ_BCOUNT,
|
|
(long) args.len);
|
|
} else {
|
|
ap->rval = NULLFSBLOCK;
|
|
ap->alen = 0;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* xfs_bmap_alloc is called by xfs_bmapi to allocate an extent for a file.
|
|
* It figures out where to ask the underlying allocator to put the new extent.
|
|
*/
|
|
STATIC int
|
|
xfs_bmap_alloc(
|
|
xfs_bmalloca_t *ap) /* bmap alloc argument struct */
|
|
{
|
|
if ((ap->ip->i_d.di_flags & XFS_DIFLAG_REALTIME) && ap->userdata)
|
|
return xfs_bmap_rtalloc(ap);
|
|
return xfs_bmap_btalloc(ap);
|
|
}
|
|
|
|
/*
|
|
* Transform a btree format file with only one leaf node, where the
|
|
* extents list will fit in the inode, into an extents format file.
|
|
* Since the file extents are already in-core, all we have to do is
|
|
* give up the space for the btree root and pitch the leaf block.
|
|
*/
|
|
STATIC int /* error */
|
|
xfs_bmap_btree_to_extents(
|
|
xfs_trans_t *tp, /* transaction pointer */
|
|
xfs_inode_t *ip, /* incore inode pointer */
|
|
xfs_btree_cur_t *cur, /* btree cursor */
|
|
int *logflagsp, /* inode logging flags */
|
|
int whichfork) /* data or attr fork */
|
|
{
|
|
/* REFERENCED */
|
|
xfs_bmbt_block_t *cblock;/* child btree block */
|
|
xfs_fsblock_t cbno; /* child block number */
|
|
xfs_buf_t *cbp; /* child block's buffer */
|
|
int error; /* error return value */
|
|
xfs_ifork_t *ifp; /* inode fork data */
|
|
xfs_mount_t *mp; /* mount point structure */
|
|
xfs_bmbt_ptr_t *pp; /* ptr to block address */
|
|
xfs_bmbt_block_t *rblock;/* root btree block */
|
|
|
|
ifp = XFS_IFORK_PTR(ip, whichfork);
|
|
ASSERT(ifp->if_flags & XFS_IFEXTENTS);
|
|
ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE);
|
|
rblock = ifp->if_broot;
|
|
ASSERT(be16_to_cpu(rblock->bb_level) == 1);
|
|
ASSERT(be16_to_cpu(rblock->bb_numrecs) == 1);
|
|
ASSERT(XFS_BMAP_BROOT_MAXRECS(ifp->if_broot_bytes) == 1);
|
|
mp = ip->i_mount;
|
|
pp = XFS_BMAP_BROOT_PTR_ADDR(rblock, 1, ifp->if_broot_bytes);
|
|
*logflagsp = 0;
|
|
#ifdef DEBUG
|
|
if ((error = xfs_btree_check_lptr_disk(cur, *pp, 1)))
|
|
return error;
|
|
#endif
|
|
cbno = INT_GET(*pp, ARCH_CONVERT);
|
|
if ((error = xfs_btree_read_bufl(mp, tp, cbno, 0, &cbp,
|
|
XFS_BMAP_BTREE_REF)))
|
|
return error;
|
|
cblock = XFS_BUF_TO_BMBT_BLOCK(cbp);
|
|
if ((error = xfs_btree_check_lblock(cur, cblock, 0, cbp)))
|
|
return error;
|
|
xfs_bmap_add_free(cbno, 1, cur->bc_private.b.flist, mp);
|
|
ip->i_d.di_nblocks--;
|
|
XFS_TRANS_MOD_DQUOT_BYINO(mp, tp, ip, XFS_TRANS_DQ_BCOUNT, -1L);
|
|
xfs_trans_binval(tp, cbp);
|
|
if (cur->bc_bufs[0] == cbp)
|
|
cur->bc_bufs[0] = NULL;
|
|
xfs_iroot_realloc(ip, -1, whichfork);
|
|
ASSERT(ifp->if_broot == NULL);
|
|
ASSERT((ifp->if_flags & XFS_IFBROOT) == 0);
|
|
XFS_IFORK_FMT_SET(ip, whichfork, XFS_DINODE_FMT_EXTENTS);
|
|
*logflagsp = XFS_ILOG_CORE | XFS_ILOG_FEXT(whichfork);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Called by xfs_bmapi to update file extent records and the btree
|
|
* after removing space (or undoing a delayed allocation).
|
|
*/
|
|
STATIC int /* error */
|
|
xfs_bmap_del_extent(
|
|
xfs_inode_t *ip, /* incore inode pointer */
|
|
xfs_trans_t *tp, /* current transaction pointer */
|
|
xfs_extnum_t idx, /* extent number to update/delete */
|
|
xfs_bmap_free_t *flist, /* list of extents to be freed */
|
|
xfs_btree_cur_t *cur, /* if null, not a btree */
|
|
xfs_bmbt_irec_t *del, /* data to remove from extents */
|
|
int *logflagsp, /* inode logging flags */
|
|
xfs_extdelta_t *delta, /* Change made to incore extents */
|
|
int whichfork, /* data or attr fork */
|
|
int rsvd) /* OK to allocate reserved blocks */
|
|
{
|
|
xfs_filblks_t da_new; /* new delay-alloc indirect blocks */
|
|
xfs_filblks_t da_old; /* old delay-alloc indirect blocks */
|
|
xfs_fsblock_t del_endblock=0; /* first block past del */
|
|
xfs_fileoff_t del_endoff; /* first offset past del */
|
|
int delay; /* current block is delayed allocated */
|
|
int do_fx; /* free extent at end of routine */
|
|
xfs_bmbt_rec_t *ep; /* current extent entry pointer */
|
|
int error; /* error return value */
|
|
int flags; /* inode logging flags */
|
|
#ifdef XFS_BMAP_TRACE
|
|
static char fname[] = "xfs_bmap_del_extent";
|
|
#endif
|
|
xfs_bmbt_irec_t got; /* current extent entry */
|
|
xfs_fileoff_t got_endoff; /* first offset past got */
|
|
int i; /* temp state */
|
|
xfs_ifork_t *ifp; /* inode fork pointer */
|
|
xfs_mount_t *mp; /* mount structure */
|
|
xfs_filblks_t nblks; /* quota/sb block count */
|
|
xfs_bmbt_irec_t new; /* new record to be inserted */
|
|
/* REFERENCED */
|
|
uint qfield; /* quota field to update */
|
|
xfs_filblks_t temp; /* for indirect length calculations */
|
|
xfs_filblks_t temp2; /* for indirect length calculations */
|
|
|
|
XFS_STATS_INC(xs_del_exlist);
|
|
mp = ip->i_mount;
|
|
ifp = XFS_IFORK_PTR(ip, whichfork);
|
|
ASSERT((idx >= 0) && (idx < ifp->if_bytes /
|
|
(uint)sizeof(xfs_bmbt_rec_t)));
|
|
ASSERT(del->br_blockcount > 0);
|
|
ep = xfs_iext_get_ext(ifp, idx);
|
|
xfs_bmbt_get_all(ep, &got);
|
|
ASSERT(got.br_startoff <= del->br_startoff);
|
|
del_endoff = del->br_startoff + del->br_blockcount;
|
|
got_endoff = got.br_startoff + got.br_blockcount;
|
|
ASSERT(got_endoff >= del_endoff);
|
|
delay = ISNULLSTARTBLOCK(got.br_startblock);
|
|
ASSERT(ISNULLSTARTBLOCK(del->br_startblock) == delay);
|
|
flags = 0;
|
|
qfield = 0;
|
|
error = 0;
|
|
/*
|
|
* If deleting a real allocation, must free up the disk space.
|
|
*/
|
|
if (!delay) {
|
|
flags = XFS_ILOG_CORE;
|
|
/*
|
|
* Realtime allocation. Free it and record di_nblocks update.
|
|
*/
|
|
if (whichfork == XFS_DATA_FORK &&
|
|
(ip->i_d.di_flags & XFS_DIFLAG_REALTIME)) {
|
|
xfs_fsblock_t bno;
|
|
xfs_filblks_t len;
|
|
|
|
ASSERT(do_mod(del->br_blockcount,
|
|
mp->m_sb.sb_rextsize) == 0);
|
|
ASSERT(do_mod(del->br_startblock,
|
|
mp->m_sb.sb_rextsize) == 0);
|
|
bno = del->br_startblock;
|
|
len = del->br_blockcount;
|
|
do_div(bno, mp->m_sb.sb_rextsize);
|
|
do_div(len, mp->m_sb.sb_rextsize);
|
|
if ((error = xfs_rtfree_extent(ip->i_transp, bno,
|
|
(xfs_extlen_t)len)))
|
|
goto done;
|
|
do_fx = 0;
|
|
nblks = len * mp->m_sb.sb_rextsize;
|
|
qfield = XFS_TRANS_DQ_RTBCOUNT;
|
|
}
|
|
/*
|
|
* Ordinary allocation.
|
|
*/
|
|
else {
|
|
do_fx = 1;
|
|
nblks = del->br_blockcount;
|
|
qfield = XFS_TRANS_DQ_BCOUNT;
|
|
}
|
|
/*
|
|
* Set up del_endblock and cur for later.
|
|
*/
|
|
del_endblock = del->br_startblock + del->br_blockcount;
|
|
if (cur) {
|
|
if ((error = xfs_bmbt_lookup_eq(cur, got.br_startoff,
|
|
got.br_startblock, got.br_blockcount,
|
|
&i)))
|
|
goto done;
|
|
ASSERT(i == 1);
|
|
}
|
|
da_old = da_new = 0;
|
|
} else {
|
|
da_old = STARTBLOCKVAL(got.br_startblock);
|
|
da_new = 0;
|
|
nblks = 0;
|
|
do_fx = 0;
|
|
}
|
|
/*
|
|
* Set flag value to use in switch statement.
|
|
* Left-contig is 2, right-contig is 1.
|
|
*/
|
|
switch (((got.br_startoff == del->br_startoff) << 1) |
|
|
(got_endoff == del_endoff)) {
|
|
case 3:
|
|
/*
|
|
* Matches the whole extent. Delete the entry.
|
|
*/
|
|
xfs_bmap_trace_delete(fname, "3", ip, idx, 1, whichfork);
|
|
xfs_iext_remove(ifp, idx, 1);
|
|
ifp->if_lastex = idx;
|
|
if (delay)
|
|
break;
|
|
XFS_IFORK_NEXT_SET(ip, whichfork,
|
|
XFS_IFORK_NEXTENTS(ip, whichfork) - 1);
|
|
flags |= XFS_ILOG_CORE;
|
|
if (!cur) {
|
|
flags |= XFS_ILOG_FEXT(whichfork);
|
|
break;
|
|
}
|
|
if ((error = xfs_bmbt_delete(cur, &i)))
|
|
goto done;
|
|
ASSERT(i == 1);
|
|
break;
|
|
|
|
case 2:
|
|
/*
|
|
* Deleting the first part of the extent.
|
|
*/
|
|
xfs_bmap_trace_pre_update(fname, "2", ip, idx, whichfork);
|
|
xfs_bmbt_set_startoff(ep, del_endoff);
|
|
temp = got.br_blockcount - del->br_blockcount;
|
|
xfs_bmbt_set_blockcount(ep, temp);
|
|
ifp->if_lastex = idx;
|
|
if (delay) {
|
|
temp = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp),
|
|
da_old);
|
|
xfs_bmbt_set_startblock(ep, NULLSTARTBLOCK((int)temp));
|
|
xfs_bmap_trace_post_update(fname, "2", ip, idx,
|
|
whichfork);
|
|
da_new = temp;
|
|
break;
|
|
}
|
|
xfs_bmbt_set_startblock(ep, del_endblock);
|
|
xfs_bmap_trace_post_update(fname, "2", ip, idx, whichfork);
|
|
if (!cur) {
|
|
flags |= XFS_ILOG_FEXT(whichfork);
|
|
break;
|
|
}
|
|
if ((error = xfs_bmbt_update(cur, del_endoff, del_endblock,
|
|
got.br_blockcount - del->br_blockcount,
|
|
got.br_state)))
|
|
goto done;
|
|
break;
|
|
|
|
case 1:
|
|
/*
|
|
* Deleting the last part of the extent.
|
|
*/
|
|
temp = got.br_blockcount - del->br_blockcount;
|
|
xfs_bmap_trace_pre_update(fname, "1", ip, idx, whichfork);
|
|
xfs_bmbt_set_blockcount(ep, temp);
|
|
ifp->if_lastex = idx;
|
|
if (delay) {
|
|
temp = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp),
|
|
da_old);
|
|
xfs_bmbt_set_startblock(ep, NULLSTARTBLOCK((int)temp));
|
|
xfs_bmap_trace_post_update(fname, "1", ip, idx,
|
|
whichfork);
|
|
da_new = temp;
|
|
break;
|
|
}
|
|
xfs_bmap_trace_post_update(fname, "1", ip, idx, whichfork);
|
|
if (!cur) {
|
|
flags |= XFS_ILOG_FEXT(whichfork);
|
|
break;
|
|
}
|
|
if ((error = xfs_bmbt_update(cur, got.br_startoff,
|
|
got.br_startblock,
|
|
got.br_blockcount - del->br_blockcount,
|
|
got.br_state)))
|
|
goto done;
|
|
break;
|
|
|
|
case 0:
|
|
/*
|
|
* Deleting the middle of the extent.
|
|
*/
|
|
temp = del->br_startoff - got.br_startoff;
|
|
xfs_bmap_trace_pre_update(fname, "0", ip, idx, whichfork);
|
|
xfs_bmbt_set_blockcount(ep, temp);
|
|
new.br_startoff = del_endoff;
|
|
temp2 = got_endoff - del_endoff;
|
|
new.br_blockcount = temp2;
|
|
new.br_state = got.br_state;
|
|
if (!delay) {
|
|
new.br_startblock = del_endblock;
|
|
flags |= XFS_ILOG_CORE;
|
|
if (cur) {
|
|
if ((error = xfs_bmbt_update(cur,
|
|
got.br_startoff,
|
|
got.br_startblock, temp,
|
|
got.br_state)))
|
|
goto done;
|
|
if ((error = xfs_bmbt_increment(cur, 0, &i)))
|
|
goto done;
|
|
cur->bc_rec.b = new;
|
|
error = xfs_bmbt_insert(cur, &i);
|
|
if (error && error != ENOSPC)
|
|
goto done;
|
|
/*
|
|
* If get no-space back from btree insert,
|
|
* it tried a split, and we have a zero
|
|
* block reservation.
|
|
* Fix up our state and return the error.
|
|
*/
|
|
if (error == ENOSPC) {
|
|
/*
|
|
* Reset the cursor, don't trust
|
|
* it after any insert operation.
|
|
*/
|
|
if ((error = xfs_bmbt_lookup_eq(cur,
|
|
got.br_startoff,
|
|
got.br_startblock,
|
|
temp, &i)))
|
|
goto done;
|
|
ASSERT(i == 1);
|
|
/*
|
|
* Update the btree record back
|
|
* to the original value.
|
|
*/
|
|
if ((error = xfs_bmbt_update(cur,
|
|
got.br_startoff,
|
|
got.br_startblock,
|
|
got.br_blockcount,
|
|
got.br_state)))
|
|
goto done;
|
|
/*
|
|
* Reset the extent record back
|
|
* to the original value.
|
|
*/
|
|
xfs_bmbt_set_blockcount(ep,
|
|
got.br_blockcount);
|
|
flags = 0;
|
|
error = XFS_ERROR(ENOSPC);
|
|
goto done;
|
|
}
|
|
ASSERT(i == 1);
|
|
} else
|
|
flags |= XFS_ILOG_FEXT(whichfork);
|
|
XFS_IFORK_NEXT_SET(ip, whichfork,
|
|
XFS_IFORK_NEXTENTS(ip, whichfork) + 1);
|
|
} else {
|
|
ASSERT(whichfork == XFS_DATA_FORK);
|
|
temp = xfs_bmap_worst_indlen(ip, temp);
|
|
xfs_bmbt_set_startblock(ep, NULLSTARTBLOCK((int)temp));
|
|
temp2 = xfs_bmap_worst_indlen(ip, temp2);
|
|
new.br_startblock = NULLSTARTBLOCK((int)temp2);
|
|
da_new = temp + temp2;
|
|
while (da_new > da_old) {
|
|
if (temp) {
|
|
temp--;
|
|
da_new--;
|
|
xfs_bmbt_set_startblock(ep,
|
|
NULLSTARTBLOCK((int)temp));
|
|
}
|
|
if (da_new == da_old)
|
|
break;
|
|
if (temp2) {
|
|
temp2--;
|
|
da_new--;
|
|
new.br_startblock =
|
|
NULLSTARTBLOCK((int)temp2);
|
|
}
|
|
}
|
|
}
|
|
xfs_bmap_trace_post_update(fname, "0", ip, idx, whichfork);
|
|
xfs_bmap_trace_insert(fname, "0", ip, idx + 1, 1, &new, NULL,
|
|
whichfork);
|
|
xfs_iext_insert(ifp, idx + 1, 1, &new);
|
|
ifp->if_lastex = idx + 1;
|
|
break;
|
|
}
|
|
/*
|
|
* If we need to, add to list of extents to delete.
|
|
*/
|
|
if (do_fx)
|
|
xfs_bmap_add_free(del->br_startblock, del->br_blockcount, flist,
|
|
mp);
|
|
/*
|
|
* Adjust inode # blocks in the file.
|
|
*/
|
|
if (nblks)
|
|
ip->i_d.di_nblocks -= nblks;
|
|
/*
|
|
* Adjust quota data.
|
|
*/
|
|
if (qfield)
|
|
XFS_TRANS_MOD_DQUOT_BYINO(mp, tp, ip, qfield, (long)-nblks);
|
|
|
|
/*
|
|
* Account for change in delayed indirect blocks.
|
|
* Nothing to do for disk quota accounting here.
|
|
*/
|
|
ASSERT(da_old >= da_new);
|
|
if (da_old > da_new)
|
|
xfs_mod_incore_sb(mp, XFS_SBS_FDBLOCKS, (int)(da_old - da_new),
|
|
rsvd);
|
|
if (delta) {
|
|
/* DELTA: report the original extent. */
|
|
if (delta->xed_startoff > got.br_startoff)
|
|
delta->xed_startoff = got.br_startoff;
|
|
if (delta->xed_blockcount < got.br_startoff+got.br_blockcount)
|
|
delta->xed_blockcount = got.br_startoff +
|
|
got.br_blockcount;
|
|
}
|
|
done:
|
|
*logflagsp = flags;
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Remove the entry "free" from the free item list. Prev points to the
|
|
* previous entry, unless "free" is the head of the list.
|
|
*/
|
|
STATIC void
|
|
xfs_bmap_del_free(
|
|
xfs_bmap_free_t *flist, /* free item list header */
|
|
xfs_bmap_free_item_t *prev, /* previous item on list, if any */
|
|
xfs_bmap_free_item_t *free) /* list item to be freed */
|
|
{
|
|
if (prev)
|
|
prev->xbfi_next = free->xbfi_next;
|
|
else
|
|
flist->xbf_first = free->xbfi_next;
|
|
flist->xbf_count--;
|
|
kmem_zone_free(xfs_bmap_free_item_zone, free);
|
|
}
|
|
|
|
/*
|
|
* Convert an extents-format file into a btree-format file.
|
|
* The new file will have a root block (in the inode) and a single child block.
|
|
*/
|
|
STATIC int /* error */
|
|
xfs_bmap_extents_to_btree(
|
|
xfs_trans_t *tp, /* transaction pointer */
|
|
xfs_inode_t *ip, /* incore inode pointer */
|
|
xfs_fsblock_t *firstblock, /* first-block-allocated */
|
|
xfs_bmap_free_t *flist, /* blocks freed in xaction */
|
|
xfs_btree_cur_t **curp, /* cursor returned to caller */
|
|
int wasdel, /* converting a delayed alloc */
|
|
int *logflagsp, /* inode logging flags */
|
|
int whichfork) /* data or attr fork */
|
|
{
|
|
xfs_bmbt_block_t *ablock; /* allocated (child) bt block */
|
|
xfs_buf_t *abp; /* buffer for ablock */
|
|
xfs_alloc_arg_t args; /* allocation arguments */
|
|
xfs_bmbt_rec_t *arp; /* child record pointer */
|
|
xfs_bmbt_block_t *block; /* btree root block */
|
|
xfs_btree_cur_t *cur; /* bmap btree cursor */
|
|
xfs_bmbt_rec_t *ep; /* extent record pointer */
|
|
int error; /* error return value */
|
|
xfs_extnum_t i, cnt; /* extent record index */
|
|
xfs_ifork_t *ifp; /* inode fork pointer */
|
|
xfs_bmbt_key_t *kp; /* root block key pointer */
|
|
xfs_mount_t *mp; /* mount structure */
|
|
xfs_extnum_t nextents; /* number of file extents */
|
|
xfs_bmbt_ptr_t *pp; /* root block address pointer */
|
|
|
|
ifp = XFS_IFORK_PTR(ip, whichfork);
|
|
ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS);
|
|
ASSERT(ifp->if_ext_max ==
|
|
XFS_IFORK_SIZE(ip, whichfork) / (uint)sizeof(xfs_bmbt_rec_t));
|
|
/*
|
|
* Make space in the inode incore.
|
|
*/
|
|
xfs_iroot_realloc(ip, 1, whichfork);
|
|
ifp->if_flags |= XFS_IFBROOT;
|
|
/*
|
|
* Fill in the root.
|
|
*/
|
|
block = ifp->if_broot;
|
|
block->bb_magic = cpu_to_be32(XFS_BMAP_MAGIC);
|
|
block->bb_level = cpu_to_be16(1);
|
|
block->bb_numrecs = cpu_to_be16(1);
|
|
block->bb_leftsib = cpu_to_be64(NULLDFSBNO);
|
|
block->bb_rightsib = cpu_to_be64(NULLDFSBNO);
|
|
/*
|
|
* Need a cursor. Can't allocate until bb_level is filled in.
|
|
*/
|
|
mp = ip->i_mount;
|
|
cur = xfs_btree_init_cursor(mp, tp, NULL, 0, XFS_BTNUM_BMAP, ip,
|
|
whichfork);
|
|
cur->bc_private.b.firstblock = *firstblock;
|
|
cur->bc_private.b.flist = flist;
|
|
cur->bc_private.b.flags = wasdel ? XFS_BTCUR_BPRV_WASDEL : 0;
|
|
/*
|
|
* Convert to a btree with two levels, one record in root.
|
|
*/
|
|
XFS_IFORK_FMT_SET(ip, whichfork, XFS_DINODE_FMT_BTREE);
|
|
args.tp = tp;
|
|
args.mp = mp;
|
|
args.firstblock = *firstblock;
|
|
if (*firstblock == NULLFSBLOCK) {
|
|
args.type = XFS_ALLOCTYPE_START_BNO;
|
|
args.fsbno = XFS_INO_TO_FSB(mp, ip->i_ino);
|
|
} else if (flist->xbf_low) {
|
|
args.type = XFS_ALLOCTYPE_START_BNO;
|
|
args.fsbno = *firstblock;
|
|
} else {
|
|
args.type = XFS_ALLOCTYPE_NEAR_BNO;
|
|
args.fsbno = *firstblock;
|
|
}
|
|
args.minlen = args.maxlen = args.prod = 1;
|
|
args.total = args.minleft = args.alignment = args.mod = args.isfl =
|
|
args.minalignslop = 0;
|
|
args.wasdel = wasdel;
|
|
*logflagsp = 0;
|
|
if ((error = xfs_alloc_vextent(&args))) {
|
|
xfs_iroot_realloc(ip, -1, whichfork);
|
|
xfs_btree_del_cursor(cur, XFS_BTREE_ERROR);
|
|
return error;
|
|
}
|
|
/*
|
|
* Allocation can't fail, the space was reserved.
|
|
*/
|
|
ASSERT(args.fsbno != NULLFSBLOCK);
|
|
ASSERT(*firstblock == NULLFSBLOCK ||
|
|
args.agno == XFS_FSB_TO_AGNO(mp, *firstblock) ||
|
|
(flist->xbf_low &&
|
|
args.agno > XFS_FSB_TO_AGNO(mp, *firstblock)));
|
|
*firstblock = cur->bc_private.b.firstblock = args.fsbno;
|
|
cur->bc_private.b.allocated++;
|
|
ip->i_d.di_nblocks++;
|
|
XFS_TRANS_MOD_DQUOT_BYINO(mp, tp, ip, XFS_TRANS_DQ_BCOUNT, 1L);
|
|
abp = xfs_btree_get_bufl(mp, tp, args.fsbno, 0);
|
|
/*
|
|
* Fill in the child block.
|
|
*/
|
|
ablock = XFS_BUF_TO_BMBT_BLOCK(abp);
|
|
ablock->bb_magic = cpu_to_be32(XFS_BMAP_MAGIC);
|
|
ablock->bb_level = 0;
|
|
ablock->bb_leftsib = cpu_to_be64(NULLDFSBNO);
|
|
ablock->bb_rightsib = cpu_to_be64(NULLDFSBNO);
|
|
arp = XFS_BMAP_REC_IADDR(ablock, 1, cur);
|
|
nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
|
|
for (cnt = i = 0; i < nextents; i++) {
|
|
ep = xfs_iext_get_ext(ifp, i);
|
|
if (!ISNULLSTARTBLOCK(xfs_bmbt_get_startblock(ep))) {
|
|
arp->l0 = INT_GET(ep->l0, ARCH_CONVERT);
|
|
arp->l1 = INT_GET(ep->l1, ARCH_CONVERT);
|
|
arp++; cnt++;
|
|
}
|
|
}
|
|
ASSERT(cnt == XFS_IFORK_NEXTENTS(ip, whichfork));
|
|
ablock->bb_numrecs = cpu_to_be16(cnt);
|
|
/*
|
|
* Fill in the root key and pointer.
|
|
*/
|
|
kp = XFS_BMAP_KEY_IADDR(block, 1, cur);
|
|
arp = XFS_BMAP_REC_IADDR(ablock, 1, cur);
|
|
INT_SET(kp->br_startoff, ARCH_CONVERT, xfs_bmbt_disk_get_startoff(arp));
|
|
pp = XFS_BMAP_PTR_IADDR(block, 1, cur);
|
|
INT_SET(*pp, ARCH_CONVERT, args.fsbno);
|
|
/*
|
|
* Do all this logging at the end so that
|
|
* the root is at the right level.
|
|
*/
|
|
xfs_bmbt_log_block(cur, abp, XFS_BB_ALL_BITS);
|
|
xfs_bmbt_log_recs(cur, abp, 1, be16_to_cpu(ablock->bb_numrecs));
|
|
ASSERT(*curp == NULL);
|
|
*curp = cur;
|
|
*logflagsp = XFS_ILOG_CORE | XFS_ILOG_FBROOT(whichfork);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Helper routine to reset inode di_forkoff field when switching
|
|
* attribute fork from local to extent format - we reset it where
|
|
* possible to make space available for inline data fork extents.
|
|
*/
|
|
STATIC void
|
|
xfs_bmap_forkoff_reset(
|
|
xfs_mount_t *mp,
|
|
xfs_inode_t *ip,
|
|
int whichfork)
|
|
{
|
|
if (whichfork == XFS_ATTR_FORK &&
|
|
(ip->i_d.di_format != XFS_DINODE_FMT_DEV) &&
|
|
(ip->i_d.di_format != XFS_DINODE_FMT_UUID) &&
|
|
((mp->m_attroffset >> 3) > ip->i_d.di_forkoff)) {
|
|
ip->i_d.di_forkoff = mp->m_attroffset >> 3;
|
|
ip->i_df.if_ext_max = XFS_IFORK_DSIZE(ip) /
|
|
(uint)sizeof(xfs_bmbt_rec_t);
|
|
ip->i_afp->if_ext_max = XFS_IFORK_ASIZE(ip) /
|
|
(uint)sizeof(xfs_bmbt_rec_t);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Convert a local file to an extents file.
|
|
* This code is out of bounds for data forks of regular files,
|
|
* since the file data needs to get logged so things will stay consistent.
|
|
* (The bmap-level manipulations are ok, though).
|
|
*/
|
|
STATIC int /* error */
|
|
xfs_bmap_local_to_extents(
|
|
xfs_trans_t *tp, /* transaction pointer */
|
|
xfs_inode_t *ip, /* incore inode pointer */
|
|
xfs_fsblock_t *firstblock, /* first block allocated in xaction */
|
|
xfs_extlen_t total, /* total blocks needed by transaction */
|
|
int *logflagsp, /* inode logging flags */
|
|
int whichfork) /* data or attr fork */
|
|
{
|
|
int error; /* error return value */
|
|
int flags; /* logging flags returned */
|
|
#ifdef XFS_BMAP_TRACE
|
|
static char fname[] = "xfs_bmap_local_to_extents";
|
|
#endif
|
|
xfs_ifork_t *ifp; /* inode fork pointer */
|
|
|
|
/*
|
|
* We don't want to deal with the case of keeping inode data inline yet.
|
|
* So sending the data fork of a regular inode is invalid.
|
|
*/
|
|
ASSERT(!((ip->i_d.di_mode & S_IFMT) == S_IFREG &&
|
|
whichfork == XFS_DATA_FORK));
|
|
ifp = XFS_IFORK_PTR(ip, whichfork);
|
|
ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL);
|
|
flags = 0;
|
|
error = 0;
|
|
if (ifp->if_bytes) {
|
|
xfs_alloc_arg_t args; /* allocation arguments */
|
|
xfs_buf_t *bp; /* buffer for extent block */
|
|
xfs_bmbt_rec_t *ep; /* extent record pointer */
|
|
|
|
args.tp = tp;
|
|
args.mp = ip->i_mount;
|
|
args.firstblock = *firstblock;
|
|
ASSERT((ifp->if_flags &
|
|
(XFS_IFINLINE|XFS_IFEXTENTS|XFS_IFEXTIREC)) == XFS_IFINLINE);
|
|
/*
|
|
* Allocate a block. We know we need only one, since the
|
|
* file currently fits in an inode.
|
|
*/
|
|
if (*firstblock == NULLFSBLOCK) {
|
|
args.fsbno = XFS_INO_TO_FSB(args.mp, ip->i_ino);
|
|
args.type = XFS_ALLOCTYPE_START_BNO;
|
|
} else {
|
|
args.fsbno = *firstblock;
|
|
args.type = XFS_ALLOCTYPE_NEAR_BNO;
|
|
}
|
|
args.total = total;
|
|
args.mod = args.minleft = args.alignment = args.wasdel =
|
|
args.isfl = args.minalignslop = 0;
|
|
args.minlen = args.maxlen = args.prod = 1;
|
|
if ((error = xfs_alloc_vextent(&args)))
|
|
goto done;
|
|
/*
|
|
* Can't fail, the space was reserved.
|
|
*/
|
|
ASSERT(args.fsbno != NULLFSBLOCK);
|
|
ASSERT(args.len == 1);
|
|
*firstblock = args.fsbno;
|
|
bp = xfs_btree_get_bufl(args.mp, tp, args.fsbno, 0);
|
|
memcpy((char *)XFS_BUF_PTR(bp), ifp->if_u1.if_data,
|
|
ifp->if_bytes);
|
|
xfs_trans_log_buf(tp, bp, 0, ifp->if_bytes - 1);
|
|
xfs_bmap_forkoff_reset(args.mp, ip, whichfork);
|
|
xfs_idata_realloc(ip, -ifp->if_bytes, whichfork);
|
|
xfs_iext_add(ifp, 0, 1);
|
|
ep = xfs_iext_get_ext(ifp, 0);
|
|
xfs_bmbt_set_allf(ep, 0, args.fsbno, 1, XFS_EXT_NORM);
|
|
xfs_bmap_trace_post_update(fname, "new", ip, 0, whichfork);
|
|
XFS_IFORK_NEXT_SET(ip, whichfork, 1);
|
|
ip->i_d.di_nblocks = 1;
|
|
XFS_TRANS_MOD_DQUOT_BYINO(args.mp, tp, ip,
|
|
XFS_TRANS_DQ_BCOUNT, 1L);
|
|
flags |= XFS_ILOG_FEXT(whichfork);
|
|
} else {
|
|
ASSERT(XFS_IFORK_NEXTENTS(ip, whichfork) == 0);
|
|
xfs_bmap_forkoff_reset(ip->i_mount, ip, whichfork);
|
|
}
|
|
ifp->if_flags &= ~XFS_IFINLINE;
|
|
ifp->if_flags |= XFS_IFEXTENTS;
|
|
XFS_IFORK_FMT_SET(ip, whichfork, XFS_DINODE_FMT_EXTENTS);
|
|
flags |= XFS_ILOG_CORE;
|
|
done:
|
|
*logflagsp = flags;
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Search the extent records for the entry containing block bno.
|
|
* If bno lies in a hole, point to the next entry. If bno lies
|
|
* past eof, *eofp will be set, and *prevp will contain the last
|
|
* entry (null if none). Else, *lastxp will be set to the index
|
|
* of the found entry; *gotp will contain the entry.
|
|
*/
|
|
xfs_bmbt_rec_t * /* pointer to found extent entry */
|
|
xfs_bmap_search_multi_extents(
|
|
xfs_ifork_t *ifp, /* inode fork pointer */
|
|
xfs_fileoff_t bno, /* block number searched for */
|
|
int *eofp, /* out: end of file found */
|
|
xfs_extnum_t *lastxp, /* out: last extent index */
|
|
xfs_bmbt_irec_t *gotp, /* out: extent entry found */
|
|
xfs_bmbt_irec_t *prevp) /* out: previous extent entry found */
|
|
{
|
|
xfs_bmbt_rec_t *ep; /* extent record pointer */
|
|
xfs_extnum_t lastx; /* last extent index */
|
|
|
|
/*
|
|
* Initialize the extent entry structure to catch access to
|
|
* uninitialized br_startblock field.
|
|
*/
|
|
gotp->br_startoff = 0xffa5a5a5a5a5a5a5LL;
|
|
gotp->br_blockcount = 0xa55a5a5a5a5a5a5aLL;
|
|
gotp->br_state = XFS_EXT_INVALID;
|
|
#if XFS_BIG_BLKNOS
|
|
gotp->br_startblock = 0xffffa5a5a5a5a5a5LL;
|
|
#else
|
|
gotp->br_startblock = 0xffffa5a5;
|
|
#endif
|
|
prevp->br_startoff = NULLFILEOFF;
|
|
|
|
ep = xfs_iext_bno_to_ext(ifp, bno, &lastx);
|
|
if (lastx > 0) {
|
|
xfs_bmbt_get_all(xfs_iext_get_ext(ifp, lastx - 1), prevp);
|
|
}
|
|
if (lastx < (ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t))) {
|
|
xfs_bmbt_get_all(ep, gotp);
|
|
*eofp = 0;
|
|
} else {
|
|
if (lastx > 0) {
|
|
*gotp = *prevp;
|
|
}
|
|
*eofp = 1;
|
|
ep = NULL;
|
|
}
|
|
*lastxp = lastx;
|
|
return ep;
|
|
}
|
|
|
|
/*
|
|
* Search the extents list for the inode, for the extent containing bno.
|
|
* If bno lies in a hole, point to the next entry. If bno lies past eof,
|
|
* *eofp will be set, and *prevp will contain the last entry (null if none).
|
|
* Else, *lastxp will be set to the index of the found
|
|
* entry; *gotp will contain the entry.
|
|
*/
|
|
STATIC xfs_bmbt_rec_t * /* pointer to found extent entry */
|
|
xfs_bmap_search_extents(
|
|
xfs_inode_t *ip, /* incore inode pointer */
|
|
xfs_fileoff_t bno, /* block number searched for */
|
|
int whichfork, /* data or attr fork */
|
|
int *eofp, /* out: end of file found */
|
|
xfs_extnum_t *lastxp, /* out: last extent index */
|
|
xfs_bmbt_irec_t *gotp, /* out: extent entry found */
|
|
xfs_bmbt_irec_t *prevp) /* out: previous extent entry found */
|
|
{
|
|
xfs_ifork_t *ifp; /* inode fork pointer */
|
|
xfs_bmbt_rec_t *ep; /* extent record pointer */
|
|
int rt; /* realtime flag */
|
|
|
|
XFS_STATS_INC(xs_look_exlist);
|
|
ifp = XFS_IFORK_PTR(ip, whichfork);
|
|
|
|
ep = xfs_bmap_search_multi_extents(ifp, bno, eofp, lastxp, gotp, prevp);
|
|
|
|
rt = (whichfork == XFS_DATA_FORK) && XFS_IS_REALTIME_INODE(ip);
|
|
if (unlikely(!rt && !gotp->br_startblock && (*lastxp != NULLEXTNUM))) {
|
|
cmn_err(CE_PANIC,"Access to block zero: fs: <%s> inode: %lld "
|
|
"start_block : %llx start_off : %llx blkcnt : %llx "
|
|
"extent-state : %x \n",
|
|
(ip->i_mount)->m_fsname, (long long)ip->i_ino,
|
|
(unsigned long long)gotp->br_startblock,
|
|
(unsigned long long)gotp->br_startoff,
|
|
(unsigned long long)gotp->br_blockcount,
|
|
gotp->br_state);
|
|
}
|
|
return ep;
|
|
}
|
|
|
|
|
|
#ifdef XFS_BMAP_TRACE
|
|
ktrace_t *xfs_bmap_trace_buf;
|
|
|
|
/*
|
|
* Add a bmap trace buffer entry. Base routine for the others.
|
|
*/
|
|
STATIC void
|
|
xfs_bmap_trace_addentry(
|
|
int opcode, /* operation */
|
|
char *fname, /* function name */
|
|
char *desc, /* operation description */
|
|
xfs_inode_t *ip, /* incore inode pointer */
|
|
xfs_extnum_t idx, /* index of entry(ies) */
|
|
xfs_extnum_t cnt, /* count of entries, 1 or 2 */
|
|
xfs_bmbt_rec_t *r1, /* first record */
|
|
xfs_bmbt_rec_t *r2, /* second record or null */
|
|
int whichfork) /* data or attr fork */
|
|
{
|
|
xfs_bmbt_rec_t tr2;
|
|
|
|
ASSERT(cnt == 1 || cnt == 2);
|
|
ASSERT(r1 != NULL);
|
|
if (cnt == 1) {
|
|
ASSERT(r2 == NULL);
|
|
r2 = &tr2;
|
|
memset(&tr2, 0, sizeof(tr2));
|
|
} else
|
|
ASSERT(r2 != NULL);
|
|
ktrace_enter(xfs_bmap_trace_buf,
|
|
(void *)(__psint_t)(opcode | (whichfork << 16)),
|
|
(void *)fname, (void *)desc, (void *)ip,
|
|
(void *)(__psint_t)idx,
|
|
(void *)(__psint_t)cnt,
|
|
(void *)(__psunsigned_t)(ip->i_ino >> 32),
|
|
(void *)(__psunsigned_t)(unsigned)ip->i_ino,
|
|
(void *)(__psunsigned_t)(r1->l0 >> 32),
|
|
(void *)(__psunsigned_t)(unsigned)(r1->l0),
|
|
(void *)(__psunsigned_t)(r1->l1 >> 32),
|
|
(void *)(__psunsigned_t)(unsigned)(r1->l1),
|
|
(void *)(__psunsigned_t)(r2->l0 >> 32),
|
|
(void *)(__psunsigned_t)(unsigned)(r2->l0),
|
|
(void *)(__psunsigned_t)(r2->l1 >> 32),
|
|
(void *)(__psunsigned_t)(unsigned)(r2->l1)
|
|
);
|
|
ASSERT(ip->i_xtrace);
|
|
ktrace_enter(ip->i_xtrace,
|
|
(void *)(__psint_t)(opcode | (whichfork << 16)),
|
|
(void *)fname, (void *)desc, (void *)ip,
|
|
(void *)(__psint_t)idx,
|
|
(void *)(__psint_t)cnt,
|
|
(void *)(__psunsigned_t)(ip->i_ino >> 32),
|
|
(void *)(__psunsigned_t)(unsigned)ip->i_ino,
|
|
(void *)(__psunsigned_t)(r1->l0 >> 32),
|
|
(void *)(__psunsigned_t)(unsigned)(r1->l0),
|
|
(void *)(__psunsigned_t)(r1->l1 >> 32),
|
|
(void *)(__psunsigned_t)(unsigned)(r1->l1),
|
|
(void *)(__psunsigned_t)(r2->l0 >> 32),
|
|
(void *)(__psunsigned_t)(unsigned)(r2->l0),
|
|
(void *)(__psunsigned_t)(r2->l1 >> 32),
|
|
(void *)(__psunsigned_t)(unsigned)(r2->l1)
|
|
);
|
|
}
|
|
|
|
/*
|
|
* Add bmap trace entry prior to a call to xfs_iext_remove.
|
|
*/
|
|
STATIC void
|
|
xfs_bmap_trace_delete(
|
|
char *fname, /* function name */
|
|
char *desc, /* operation description */
|
|
xfs_inode_t *ip, /* incore inode pointer */
|
|
xfs_extnum_t idx, /* index of entry(entries) deleted */
|
|
xfs_extnum_t cnt, /* count of entries deleted, 1 or 2 */
|
|
int whichfork) /* data or attr fork */
|
|
{
|
|
xfs_ifork_t *ifp; /* inode fork pointer */
|
|
|
|
ifp = XFS_IFORK_PTR(ip, whichfork);
|
|
xfs_bmap_trace_addentry(XFS_BMAP_KTRACE_DELETE, fname, desc, ip, idx,
|
|
cnt, xfs_iext_get_ext(ifp, idx),
|
|
cnt == 2 ? xfs_iext_get_ext(ifp, idx + 1) : NULL,
|
|
whichfork);
|
|
}
|
|
|
|
/*
|
|
* Add bmap trace entry prior to a call to xfs_iext_insert, or
|
|
* reading in the extents list from the disk (in the btree).
|
|
*/
|
|
STATIC void
|
|
xfs_bmap_trace_insert(
|
|
char *fname, /* function name */
|
|
char *desc, /* operation description */
|
|
xfs_inode_t *ip, /* incore inode pointer */
|
|
xfs_extnum_t idx, /* index of entry(entries) inserted */
|
|
xfs_extnum_t cnt, /* count of entries inserted, 1 or 2 */
|
|
xfs_bmbt_irec_t *r1, /* inserted record 1 */
|
|
xfs_bmbt_irec_t *r2, /* inserted record 2 or null */
|
|
int whichfork) /* data or attr fork */
|
|
{
|
|
xfs_bmbt_rec_t tr1; /* compressed record 1 */
|
|
xfs_bmbt_rec_t tr2; /* compressed record 2 if needed */
|
|
|
|
xfs_bmbt_set_all(&tr1, r1);
|
|
if (cnt == 2) {
|
|
ASSERT(r2 != NULL);
|
|
xfs_bmbt_set_all(&tr2, r2);
|
|
} else {
|
|
ASSERT(cnt == 1);
|
|
ASSERT(r2 == NULL);
|
|
}
|
|
xfs_bmap_trace_addentry(XFS_BMAP_KTRACE_INSERT, fname, desc, ip, idx,
|
|
cnt, &tr1, cnt == 2 ? &tr2 : NULL, whichfork);
|
|
}
|
|
|
|
/*
|
|
* Add bmap trace entry after updating an extent record in place.
|
|
*/
|
|
STATIC void
|
|
xfs_bmap_trace_post_update(
|
|
char *fname, /* function name */
|
|
char *desc, /* operation description */
|
|
xfs_inode_t *ip, /* incore inode pointer */
|
|
xfs_extnum_t idx, /* index of entry updated */
|
|
int whichfork) /* data or attr fork */
|
|
{
|
|
xfs_ifork_t *ifp; /* inode fork pointer */
|
|
|
|
ifp = XFS_IFORK_PTR(ip, whichfork);
|
|
xfs_bmap_trace_addentry(XFS_BMAP_KTRACE_POST_UP, fname, desc, ip, idx,
|
|
1, xfs_iext_get_ext(ifp, idx), NULL, whichfork);
|
|
}
|
|
|
|
/*
|
|
* Add bmap trace entry prior to updating an extent record in place.
|
|
*/
|
|
STATIC void
|
|
xfs_bmap_trace_pre_update(
|
|
char *fname, /* function name */
|
|
char *desc, /* operation description */
|
|
xfs_inode_t *ip, /* incore inode pointer */
|
|
xfs_extnum_t idx, /* index of entry to be updated */
|
|
int whichfork) /* data or attr fork */
|
|
{
|
|
xfs_ifork_t *ifp; /* inode fork pointer */
|
|
|
|
ifp = XFS_IFORK_PTR(ip, whichfork);
|
|
xfs_bmap_trace_addentry(XFS_BMAP_KTRACE_PRE_UP, fname, desc, ip, idx, 1,
|
|
xfs_iext_get_ext(ifp, idx), NULL, whichfork);
|
|
}
|
|
#endif /* XFS_BMAP_TRACE */
|
|
|
|
/*
|
|
* Compute the worst-case number of indirect blocks that will be used
|
|
* for ip's delayed extent of length "len".
|
|
*/
|
|
STATIC xfs_filblks_t
|
|
xfs_bmap_worst_indlen(
|
|
xfs_inode_t *ip, /* incore inode pointer */
|
|
xfs_filblks_t len) /* delayed extent length */
|
|
{
|
|
int level; /* btree level number */
|
|
int maxrecs; /* maximum record count at this level */
|
|
xfs_mount_t *mp; /* mount structure */
|
|
xfs_filblks_t rval; /* return value */
|
|
|
|
mp = ip->i_mount;
|
|
maxrecs = mp->m_bmap_dmxr[0];
|
|
for (level = 0, rval = 0;
|
|
level < XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK);
|
|
level++) {
|
|
len += maxrecs - 1;
|
|
do_div(len, maxrecs);
|
|
rval += len;
|
|
if (len == 1)
|
|
return rval + XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK) -
|
|
level - 1;
|
|
if (level == 0)
|
|
maxrecs = mp->m_bmap_dmxr[1];
|
|
}
|
|
return rval;
|
|
}
|
|
|
|
#if defined(XFS_RW_TRACE)
|
|
STATIC void
|
|
xfs_bunmap_trace(
|
|
xfs_inode_t *ip,
|
|
xfs_fileoff_t bno,
|
|
xfs_filblks_t len,
|
|
int flags,
|
|
inst_t *ra)
|
|
{
|
|
if (ip->i_rwtrace == NULL)
|
|
return;
|
|
ktrace_enter(ip->i_rwtrace,
|
|
(void *)(__psint_t)XFS_BUNMAP,
|
|
(void *)ip,
|
|
(void *)(__psint_t)((ip->i_d.di_size >> 32) & 0xffffffff),
|
|
(void *)(__psint_t)(ip->i_d.di_size & 0xffffffff),
|
|
(void *)(__psint_t)(((xfs_dfiloff_t)bno >> 32) & 0xffffffff),
|
|
(void *)(__psint_t)((xfs_dfiloff_t)bno & 0xffffffff),
|
|
(void *)(__psint_t)len,
|
|
(void *)(__psint_t)flags,
|
|
(void *)(unsigned long)current_cpu(),
|
|
(void *)ra,
|
|
(void *)0,
|
|
(void *)0,
|
|
(void *)0,
|
|
(void *)0,
|
|
(void *)0,
|
|
(void *)0);
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Convert inode from non-attributed to attributed.
|
|
* Must not be in a transaction, ip must not be locked.
|
|
*/
|
|
int /* error code */
|
|
xfs_bmap_add_attrfork(
|
|
xfs_inode_t *ip, /* incore inode pointer */
|
|
int size, /* space new attribute needs */
|
|
int rsvd) /* xact may use reserved blks */
|
|
{
|
|
xfs_fsblock_t firstblock; /* 1st block/ag allocated */
|
|
xfs_bmap_free_t flist; /* freed extent records */
|
|
xfs_mount_t *mp; /* mount structure */
|
|
xfs_trans_t *tp; /* transaction pointer */
|
|
unsigned long s; /* spinlock spl value */
|
|
int blks; /* space reservation */
|
|
int version = 1; /* superblock attr version */
|
|
int committed; /* xaction was committed */
|
|
int logflags; /* logging flags */
|
|
int error; /* error return value */
|
|
|
|
ASSERT(XFS_IFORK_Q(ip) == 0);
|
|
ASSERT(ip->i_df.if_ext_max ==
|
|
XFS_IFORK_DSIZE(ip) / (uint)sizeof(xfs_bmbt_rec_t));
|
|
|
|
mp = ip->i_mount;
|
|
ASSERT(!XFS_NOT_DQATTACHED(mp, ip));
|
|
tp = xfs_trans_alloc(mp, XFS_TRANS_ADDAFORK);
|
|
blks = XFS_ADDAFORK_SPACE_RES(mp);
|
|
if (rsvd)
|
|
tp->t_flags |= XFS_TRANS_RESERVE;
|
|
if ((error = xfs_trans_reserve(tp, blks, XFS_ADDAFORK_LOG_RES(mp), 0,
|
|
XFS_TRANS_PERM_LOG_RES, XFS_ADDAFORK_LOG_COUNT)))
|
|
goto error0;
|
|
xfs_ilock(ip, XFS_ILOCK_EXCL);
|
|
error = XFS_TRANS_RESERVE_QUOTA_NBLKS(mp, tp, ip, blks, 0, rsvd ?
|
|
XFS_QMOPT_RES_REGBLKS | XFS_QMOPT_FORCE_RES :
|
|
XFS_QMOPT_RES_REGBLKS);
|
|
if (error) {
|
|
xfs_iunlock(ip, XFS_ILOCK_EXCL);
|
|
xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES);
|
|
return error;
|
|
}
|
|
if (XFS_IFORK_Q(ip))
|
|
goto error1;
|
|
if (ip->i_d.di_aformat != XFS_DINODE_FMT_EXTENTS) {
|
|
/*
|
|
* For inodes coming from pre-6.2 filesystems.
|
|
*/
|
|
ASSERT(ip->i_d.di_aformat == 0);
|
|
ip->i_d.di_aformat = XFS_DINODE_FMT_EXTENTS;
|
|
}
|
|
ASSERT(ip->i_d.di_anextents == 0);
|
|
VN_HOLD(XFS_ITOV(ip));
|
|
xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
|
|
xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
|
|
switch (ip->i_d.di_format) {
|
|
case XFS_DINODE_FMT_DEV:
|
|
ip->i_d.di_forkoff = roundup(sizeof(xfs_dev_t), 8) >> 3;
|
|
break;
|
|
case XFS_DINODE_FMT_UUID:
|
|
ip->i_d.di_forkoff = roundup(sizeof(uuid_t), 8) >> 3;
|
|
break;
|
|
case XFS_DINODE_FMT_LOCAL:
|
|
case XFS_DINODE_FMT_EXTENTS:
|
|
case XFS_DINODE_FMT_BTREE:
|
|
ip->i_d.di_forkoff = xfs_attr_shortform_bytesfit(ip, size);
|
|
if (!ip->i_d.di_forkoff)
|
|
ip->i_d.di_forkoff = mp->m_attroffset >> 3;
|
|
else if (mp->m_flags & XFS_MOUNT_ATTR2)
|
|
version = 2;
|
|
break;
|
|
default:
|
|
ASSERT(0);
|
|
error = XFS_ERROR(EINVAL);
|
|
goto error1;
|
|
}
|
|
ip->i_df.if_ext_max =
|
|
XFS_IFORK_DSIZE(ip) / (uint)sizeof(xfs_bmbt_rec_t);
|
|
ASSERT(ip->i_afp == NULL);
|
|
ip->i_afp = kmem_zone_zalloc(xfs_ifork_zone, KM_SLEEP);
|
|
ip->i_afp->if_ext_max =
|
|
XFS_IFORK_ASIZE(ip) / (uint)sizeof(xfs_bmbt_rec_t);
|
|
ip->i_afp->if_flags = XFS_IFEXTENTS;
|
|
logflags = 0;
|
|
XFS_BMAP_INIT(&flist, &firstblock);
|
|
switch (ip->i_d.di_format) {
|
|
case XFS_DINODE_FMT_LOCAL:
|
|
error = xfs_bmap_add_attrfork_local(tp, ip, &firstblock, &flist,
|
|
&logflags);
|
|
break;
|
|
case XFS_DINODE_FMT_EXTENTS:
|
|
error = xfs_bmap_add_attrfork_extents(tp, ip, &firstblock,
|
|
&flist, &logflags);
|
|
break;
|
|
case XFS_DINODE_FMT_BTREE:
|
|
error = xfs_bmap_add_attrfork_btree(tp, ip, &firstblock, &flist,
|
|
&logflags);
|
|
break;
|
|
default:
|
|
error = 0;
|
|
break;
|
|
}
|
|
if (logflags)
|
|
xfs_trans_log_inode(tp, ip, logflags);
|
|
if (error)
|
|
goto error2;
|
|
if (!XFS_SB_VERSION_HASATTR(&mp->m_sb) ||
|
|
(!XFS_SB_VERSION_HASATTR2(&mp->m_sb) && version == 2)) {
|
|
__int64_t sbfields = 0;
|
|
|
|
s = XFS_SB_LOCK(mp);
|
|
if (!XFS_SB_VERSION_HASATTR(&mp->m_sb)) {
|
|
XFS_SB_VERSION_ADDATTR(&mp->m_sb);
|
|
sbfields |= XFS_SB_VERSIONNUM;
|
|
}
|
|
if (!XFS_SB_VERSION_HASATTR2(&mp->m_sb) && version == 2) {
|
|
XFS_SB_VERSION_ADDATTR2(&mp->m_sb);
|
|
sbfields |= (XFS_SB_VERSIONNUM | XFS_SB_FEATURES2);
|
|
}
|
|
if (sbfields) {
|
|
XFS_SB_UNLOCK(mp, s);
|
|
xfs_mod_sb(tp, sbfields);
|
|
} else
|
|
XFS_SB_UNLOCK(mp, s);
|
|
}
|
|
if ((error = xfs_bmap_finish(&tp, &flist, firstblock, &committed)))
|
|
goto error2;
|
|
error = xfs_trans_commit(tp, XFS_TRANS_PERM_LOG_RES, NULL);
|
|
ASSERT(ip->i_df.if_ext_max ==
|
|
XFS_IFORK_DSIZE(ip) / (uint)sizeof(xfs_bmbt_rec_t));
|
|
return error;
|
|
error2:
|
|
xfs_bmap_cancel(&flist);
|
|
error1:
|
|
ASSERT(ismrlocked(&ip->i_lock,MR_UPDATE));
|
|
xfs_iunlock(ip, XFS_ILOCK_EXCL);
|
|
error0:
|
|
xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES|XFS_TRANS_ABORT);
|
|
ASSERT(ip->i_df.if_ext_max ==
|
|
XFS_IFORK_DSIZE(ip) / (uint)sizeof(xfs_bmbt_rec_t));
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Add the extent to the list of extents to be free at transaction end.
|
|
* The list is maintained sorted (by block number).
|
|
*/
|
|
/* ARGSUSED */
|
|
void
|
|
xfs_bmap_add_free(
|
|
xfs_fsblock_t bno, /* fs block number of extent */
|
|
xfs_filblks_t len, /* length of extent */
|
|
xfs_bmap_free_t *flist, /* list of extents */
|
|
xfs_mount_t *mp) /* mount point structure */
|
|
{
|
|
xfs_bmap_free_item_t *cur; /* current (next) element */
|
|
xfs_bmap_free_item_t *new; /* new element */
|
|
xfs_bmap_free_item_t *prev; /* previous element */
|
|
#ifdef DEBUG
|
|
xfs_agnumber_t agno;
|
|
xfs_agblock_t agbno;
|
|
|
|
ASSERT(bno != NULLFSBLOCK);
|
|
ASSERT(len > 0);
|
|
ASSERT(len <= MAXEXTLEN);
|
|
ASSERT(!ISNULLSTARTBLOCK(bno));
|
|
agno = XFS_FSB_TO_AGNO(mp, bno);
|
|
agbno = XFS_FSB_TO_AGBNO(mp, bno);
|
|
ASSERT(agno < mp->m_sb.sb_agcount);
|
|
ASSERT(agbno < mp->m_sb.sb_agblocks);
|
|
ASSERT(len < mp->m_sb.sb_agblocks);
|
|
ASSERT(agbno + len <= mp->m_sb.sb_agblocks);
|
|
#endif
|
|
ASSERT(xfs_bmap_free_item_zone != NULL);
|
|
new = kmem_zone_alloc(xfs_bmap_free_item_zone, KM_SLEEP);
|
|
new->xbfi_startblock = bno;
|
|
new->xbfi_blockcount = (xfs_extlen_t)len;
|
|
for (prev = NULL, cur = flist->xbf_first;
|
|
cur != NULL;
|
|
prev = cur, cur = cur->xbfi_next) {
|
|
if (cur->xbfi_startblock >= bno)
|
|
break;
|
|
}
|
|
if (prev)
|
|
prev->xbfi_next = new;
|
|
else
|
|
flist->xbf_first = new;
|
|
new->xbfi_next = cur;
|
|
flist->xbf_count++;
|
|
}
|
|
|
|
/*
|
|
* Compute and fill in the value of the maximum depth of a bmap btree
|
|
* in this filesystem. Done once, during mount.
|
|
*/
|
|
void
|
|
xfs_bmap_compute_maxlevels(
|
|
xfs_mount_t *mp, /* file system mount structure */
|
|
int whichfork) /* data or attr fork */
|
|
{
|
|
int level; /* btree level */
|
|
uint maxblocks; /* max blocks at this level */
|
|
uint maxleafents; /* max leaf entries possible */
|
|
int maxrootrecs; /* max records in root block */
|
|
int minleafrecs; /* min records in leaf block */
|
|
int minnoderecs; /* min records in node block */
|
|
int sz; /* root block size */
|
|
|
|
/*
|
|
* The maximum number of extents in a file, hence the maximum
|
|
* number of leaf entries, is controlled by the type of di_nextents
|
|
* (a signed 32-bit number, xfs_extnum_t), or by di_anextents
|
|
* (a signed 16-bit number, xfs_aextnum_t).
|
|
*/
|
|
if (whichfork == XFS_DATA_FORK) {
|
|
maxleafents = MAXEXTNUM;
|
|
sz = (mp->m_flags & XFS_MOUNT_ATTR2) ?
|
|
XFS_BMDR_SPACE_CALC(MINDBTPTRS) : mp->m_attroffset;
|
|
} else {
|
|
maxleafents = MAXAEXTNUM;
|
|
sz = (mp->m_flags & XFS_MOUNT_ATTR2) ?
|
|
XFS_BMDR_SPACE_CALC(MINABTPTRS) :
|
|
mp->m_sb.sb_inodesize - mp->m_attroffset;
|
|
}
|
|
maxrootrecs = (int)XFS_BTREE_BLOCK_MAXRECS(sz, xfs_bmdr, 0);
|
|
minleafrecs = mp->m_bmap_dmnr[0];
|
|
minnoderecs = mp->m_bmap_dmnr[1];
|
|
maxblocks = (maxleafents + minleafrecs - 1) / minleafrecs;
|
|
for (level = 1; maxblocks > 1; level++) {
|
|
if (maxblocks <= maxrootrecs)
|
|
maxblocks = 1;
|
|
else
|
|
maxblocks = (maxblocks + minnoderecs - 1) / minnoderecs;
|
|
}
|
|
mp->m_bm_maxlevels[whichfork] = level;
|
|
}
|
|
|
|
/*
|
|
* Routine to be called at transaction's end by xfs_bmapi, xfs_bunmapi
|
|
* caller. Frees all the extents that need freeing, which must be done
|
|
* last due to locking considerations. We never free any extents in
|
|
* the first transaction. This is to allow the caller to make the first
|
|
* transaction a synchronous one so that the pointers to the data being
|
|
* broken in this transaction will be permanent before the data is actually
|
|
* freed. This is necessary to prevent blocks from being reallocated
|
|
* and written to before the free and reallocation are actually permanent.
|
|
* We do not just make the first transaction synchronous here, because
|
|
* there are more efficient ways to gain the same protection in some cases
|
|
* (see the file truncation code).
|
|
*
|
|
* Return 1 if the given transaction was committed and a new one
|
|
* started, and 0 otherwise in the committed parameter.
|
|
*/
|
|
/*ARGSUSED*/
|
|
int /* error */
|
|
xfs_bmap_finish(
|
|
xfs_trans_t **tp, /* transaction pointer addr */
|
|
xfs_bmap_free_t *flist, /* i/o: list extents to free */
|
|
xfs_fsblock_t firstblock, /* controlled ag for allocs */
|
|
int *committed) /* xact committed or not */
|
|
{
|
|
xfs_efd_log_item_t *efd; /* extent free data */
|
|
xfs_efi_log_item_t *efi; /* extent free intention */
|
|
int error; /* error return value */
|
|
xfs_bmap_free_item_t *free; /* free extent item */
|
|
unsigned int logres; /* new log reservation */
|
|
unsigned int logcount; /* new log count */
|
|
xfs_mount_t *mp; /* filesystem mount structure */
|
|
xfs_bmap_free_item_t *next; /* next item on free list */
|
|
xfs_trans_t *ntp; /* new transaction pointer */
|
|
|
|
ASSERT((*tp)->t_flags & XFS_TRANS_PERM_LOG_RES);
|
|
if (flist->xbf_count == 0) {
|
|
*committed = 0;
|
|
return 0;
|
|
}
|
|
ntp = *tp;
|
|
efi = xfs_trans_get_efi(ntp, flist->xbf_count);
|
|
for (free = flist->xbf_first; free; free = free->xbfi_next)
|
|
xfs_trans_log_efi_extent(ntp, efi, free->xbfi_startblock,
|
|
free->xbfi_blockcount);
|
|
logres = ntp->t_log_res;
|
|
logcount = ntp->t_log_count;
|
|
ntp = xfs_trans_dup(*tp);
|
|
error = xfs_trans_commit(*tp, 0, NULL);
|
|
*tp = ntp;
|
|
*committed = 1;
|
|
/*
|
|
* We have a new transaction, so we should return committed=1,
|
|
* even though we're returning an error.
|
|
*/
|
|
if (error) {
|
|
return error;
|
|
}
|
|
if ((error = xfs_trans_reserve(ntp, 0, logres, 0, XFS_TRANS_PERM_LOG_RES,
|
|
logcount)))
|
|
return error;
|
|
efd = xfs_trans_get_efd(ntp, efi, flist->xbf_count);
|
|
for (free = flist->xbf_first; free != NULL; free = next) {
|
|
next = free->xbfi_next;
|
|
if ((error = xfs_free_extent(ntp, free->xbfi_startblock,
|
|
free->xbfi_blockcount))) {
|
|
/*
|
|
* The bmap free list will be cleaned up at a
|
|
* higher level. The EFI will be canceled when
|
|
* this transaction is aborted.
|
|
* Need to force shutdown here to make sure it
|
|
* happens, since this transaction may not be
|
|
* dirty yet.
|
|
*/
|
|
mp = ntp->t_mountp;
|
|
if (!XFS_FORCED_SHUTDOWN(mp))
|
|
xfs_force_shutdown(mp,
|
|
(error == EFSCORRUPTED) ?
|
|
SHUTDOWN_CORRUPT_INCORE :
|
|
SHUTDOWN_META_IO_ERROR);
|
|
return error;
|
|
}
|
|
xfs_trans_log_efd_extent(ntp, efd, free->xbfi_startblock,
|
|
free->xbfi_blockcount);
|
|
xfs_bmap_del_free(flist, NULL, free);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Free up any items left in the list.
|
|
*/
|
|
void
|
|
xfs_bmap_cancel(
|
|
xfs_bmap_free_t *flist) /* list of bmap_free_items */
|
|
{
|
|
xfs_bmap_free_item_t *free; /* free list item */
|
|
xfs_bmap_free_item_t *next;
|
|
|
|
if (flist->xbf_count == 0)
|
|
return;
|
|
ASSERT(flist->xbf_first != NULL);
|
|
for (free = flist->xbf_first; free; free = next) {
|
|
next = free->xbfi_next;
|
|
xfs_bmap_del_free(flist, NULL, free);
|
|
}
|
|
ASSERT(flist->xbf_count == 0);
|
|
}
|
|
|
|
/*
|
|
* Returns the file-relative block number of the first unused block(s)
|
|
* in the file with at least "len" logically contiguous blocks free.
|
|
* This is the lowest-address hole if the file has holes, else the first block
|
|
* past the end of file.
|
|
* Return 0 if the file is currently local (in-inode).
|
|
*/
|
|
int /* error */
|
|
xfs_bmap_first_unused(
|
|
xfs_trans_t *tp, /* transaction pointer */
|
|
xfs_inode_t *ip, /* incore inode */
|
|
xfs_extlen_t len, /* size of hole to find */
|
|
xfs_fileoff_t *first_unused, /* unused block */
|
|
int whichfork) /* data or attr fork */
|
|
{
|
|
xfs_bmbt_rec_t *ep; /* pointer to an extent entry */
|
|
int error; /* error return value */
|
|
int idx; /* extent record index */
|
|
xfs_ifork_t *ifp; /* inode fork pointer */
|
|
xfs_fileoff_t lastaddr; /* last block number seen */
|
|
xfs_fileoff_t lowest; /* lowest useful block */
|
|
xfs_fileoff_t max; /* starting useful block */
|
|
xfs_fileoff_t off; /* offset for this block */
|
|
xfs_extnum_t nextents; /* number of extent entries */
|
|
|
|
ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE ||
|
|
XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS ||
|
|
XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL);
|
|
if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL) {
|
|
*first_unused = 0;
|
|
return 0;
|
|
}
|
|
ifp = XFS_IFORK_PTR(ip, whichfork);
|
|
if (!(ifp->if_flags & XFS_IFEXTENTS) &&
|
|
(error = xfs_iread_extents(tp, ip, whichfork)))
|
|
return error;
|
|
lowest = *first_unused;
|
|
nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
|
|
for (idx = 0, lastaddr = 0, max = lowest; idx < nextents; idx++) {
|
|
ep = xfs_iext_get_ext(ifp, idx);
|
|
off = xfs_bmbt_get_startoff(ep);
|
|
/*
|
|
* See if the hole before this extent will work.
|
|
*/
|
|
if (off >= lowest + len && off - max >= len) {
|
|
*first_unused = max;
|
|
return 0;
|
|
}
|
|
lastaddr = off + xfs_bmbt_get_blockcount(ep);
|
|
max = XFS_FILEOFF_MAX(lastaddr, lowest);
|
|
}
|
|
*first_unused = max;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Returns the file-relative block number of the last block + 1 before
|
|
* last_block (input value) in the file.
|
|
* This is not based on i_size, it is based on the extent records.
|
|
* Returns 0 for local files, as they do not have extent records.
|
|
*/
|
|
int /* error */
|
|
xfs_bmap_last_before(
|
|
xfs_trans_t *tp, /* transaction pointer */
|
|
xfs_inode_t *ip, /* incore inode */
|
|
xfs_fileoff_t *last_block, /* last block */
|
|
int whichfork) /* data or attr fork */
|
|
{
|
|
xfs_fileoff_t bno; /* input file offset */
|
|
int eof; /* hit end of file */
|
|
xfs_bmbt_rec_t *ep; /* pointer to last extent */
|
|
int error; /* error return value */
|
|
xfs_bmbt_irec_t got; /* current extent value */
|
|
xfs_ifork_t *ifp; /* inode fork pointer */
|
|
xfs_extnum_t lastx; /* last extent used */
|
|
xfs_bmbt_irec_t prev; /* previous extent value */
|
|
|
|
if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE &&
|
|
XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS &&
|
|
XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_LOCAL)
|
|
return XFS_ERROR(EIO);
|
|
if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL) {
|
|
*last_block = 0;
|
|
return 0;
|
|
}
|
|
ifp = XFS_IFORK_PTR(ip, whichfork);
|
|
if (!(ifp->if_flags & XFS_IFEXTENTS) &&
|
|
(error = xfs_iread_extents(tp, ip, whichfork)))
|
|
return error;
|
|
bno = *last_block - 1;
|
|
ep = xfs_bmap_search_extents(ip, bno, whichfork, &eof, &lastx, &got,
|
|
&prev);
|
|
if (eof || xfs_bmbt_get_startoff(ep) > bno) {
|
|
if (prev.br_startoff == NULLFILEOFF)
|
|
*last_block = 0;
|
|
else
|
|
*last_block = prev.br_startoff + prev.br_blockcount;
|
|
}
|
|
/*
|
|
* Otherwise *last_block is already the right answer.
|
|
*/
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Returns the file-relative block number of the first block past eof in
|
|
* the file. This is not based on i_size, it is based on the extent records.
|
|
* Returns 0 for local files, as they do not have extent records.
|
|
*/
|
|
int /* error */
|
|
xfs_bmap_last_offset(
|
|
xfs_trans_t *tp, /* transaction pointer */
|
|
xfs_inode_t *ip, /* incore inode */
|
|
xfs_fileoff_t *last_block, /* last block */
|
|
int whichfork) /* data or attr fork */
|
|
{
|
|
xfs_bmbt_rec_t *ep; /* pointer to last extent */
|
|
int error; /* error return value */
|
|
xfs_ifork_t *ifp; /* inode fork pointer */
|
|
xfs_extnum_t nextents; /* number of extent entries */
|
|
|
|
if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE &&
|
|
XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS &&
|
|
XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_LOCAL)
|
|
return XFS_ERROR(EIO);
|
|
if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL) {
|
|
*last_block = 0;
|
|
return 0;
|
|
}
|
|
ifp = XFS_IFORK_PTR(ip, whichfork);
|
|
if (!(ifp->if_flags & XFS_IFEXTENTS) &&
|
|
(error = xfs_iread_extents(tp, ip, whichfork)))
|
|
return error;
|
|
nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
|
|
if (!nextents) {
|
|
*last_block = 0;
|
|
return 0;
|
|
}
|
|
ep = xfs_iext_get_ext(ifp, nextents - 1);
|
|
*last_block = xfs_bmbt_get_startoff(ep) + xfs_bmbt_get_blockcount(ep);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Returns whether the selected fork of the inode has exactly one
|
|
* block or not. For the data fork we check this matches di_size,
|
|
* implying the file's range is 0..bsize-1.
|
|
*/
|
|
int /* 1=>1 block, 0=>otherwise */
|
|
xfs_bmap_one_block(
|
|
xfs_inode_t *ip, /* incore inode */
|
|
int whichfork) /* data or attr fork */
|
|
{
|
|
xfs_bmbt_rec_t *ep; /* ptr to fork's extent */
|
|
xfs_ifork_t *ifp; /* inode fork pointer */
|
|
int rval; /* return value */
|
|
xfs_bmbt_irec_t s; /* internal version of extent */
|
|
|
|
#ifndef DEBUG
|
|
if (whichfork == XFS_DATA_FORK)
|
|
return ip->i_d.di_size == ip->i_mount->m_sb.sb_blocksize;
|
|
#endif /* !DEBUG */
|
|
if (XFS_IFORK_NEXTENTS(ip, whichfork) != 1)
|
|
return 0;
|
|
if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS)
|
|
return 0;
|
|
ifp = XFS_IFORK_PTR(ip, whichfork);
|
|
ASSERT(ifp->if_flags & XFS_IFEXTENTS);
|
|
ep = xfs_iext_get_ext(ifp, 0);
|
|
xfs_bmbt_get_all(ep, &s);
|
|
rval = s.br_startoff == 0 && s.br_blockcount == 1;
|
|
if (rval && whichfork == XFS_DATA_FORK)
|
|
ASSERT(ip->i_d.di_size == ip->i_mount->m_sb.sb_blocksize);
|
|
return rval;
|
|
}
|
|
|
|
/*
|
|
* Read in the extents to if_extents.
|
|
* All inode fields are set up by caller, we just traverse the btree
|
|
* and copy the records in. If the file system cannot contain unwritten
|
|
* extents, the records are checked for no "state" flags.
|
|
*/
|
|
int /* error */
|
|
xfs_bmap_read_extents(
|
|
xfs_trans_t *tp, /* transaction pointer */
|
|
xfs_inode_t *ip, /* incore inode */
|
|
int whichfork) /* data or attr fork */
|
|
{
|
|
xfs_bmbt_block_t *block; /* current btree block */
|
|
xfs_fsblock_t bno; /* block # of "block" */
|
|
xfs_buf_t *bp; /* buffer for "block" */
|
|
int error; /* error return value */
|
|
xfs_exntfmt_t exntf; /* XFS_EXTFMT_NOSTATE, if checking */
|
|
#ifdef XFS_BMAP_TRACE
|
|
static char fname[] = "xfs_bmap_read_extents";
|
|
#endif
|
|
xfs_extnum_t i, j; /* index into the extents list */
|
|
xfs_ifork_t *ifp; /* fork structure */
|
|
int level; /* btree level, for checking */
|
|
xfs_mount_t *mp; /* file system mount structure */
|
|
xfs_bmbt_ptr_t *pp; /* pointer to block address */
|
|
/* REFERENCED */
|
|
xfs_extnum_t room; /* number of entries there's room for */
|
|
|
|
bno = NULLFSBLOCK;
|
|
mp = ip->i_mount;
|
|
ifp = XFS_IFORK_PTR(ip, whichfork);
|
|
exntf = (whichfork != XFS_DATA_FORK) ? XFS_EXTFMT_NOSTATE :
|
|
XFS_EXTFMT_INODE(ip);
|
|
block = ifp->if_broot;
|
|
/*
|
|
* Root level must use BMAP_BROOT_PTR_ADDR macro to get ptr out.
|
|
*/
|
|
level = be16_to_cpu(block->bb_level);
|
|
ASSERT(level > 0);
|
|
pp = XFS_BMAP_BROOT_PTR_ADDR(block, 1, ifp->if_broot_bytes);
|
|
ASSERT(INT_GET(*pp, ARCH_CONVERT) != NULLDFSBNO);
|
|
ASSERT(XFS_FSB_TO_AGNO(mp, INT_GET(*pp, ARCH_CONVERT)) < mp->m_sb.sb_agcount);
|
|
ASSERT(XFS_FSB_TO_AGBNO(mp, INT_GET(*pp, ARCH_CONVERT)) < mp->m_sb.sb_agblocks);
|
|
bno = INT_GET(*pp, ARCH_CONVERT);
|
|
/*
|
|
* Go down the tree until leaf level is reached, following the first
|
|
* pointer (leftmost) at each level.
|
|
*/
|
|
while (level-- > 0) {
|
|
if ((error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp,
|
|
XFS_BMAP_BTREE_REF)))
|
|
return error;
|
|
block = XFS_BUF_TO_BMBT_BLOCK(bp);
|
|
XFS_WANT_CORRUPTED_GOTO(
|
|
XFS_BMAP_SANITY_CHECK(mp, block, level),
|
|
error0);
|
|
if (level == 0)
|
|
break;
|
|
pp = XFS_BTREE_PTR_ADDR(mp->m_sb.sb_blocksize, xfs_bmbt, block,
|
|
1, mp->m_bmap_dmxr[1]);
|
|
XFS_WANT_CORRUPTED_GOTO(
|
|
XFS_FSB_SANITY_CHECK(mp, INT_GET(*pp, ARCH_CONVERT)),
|
|
error0);
|
|
bno = INT_GET(*pp, ARCH_CONVERT);
|
|
xfs_trans_brelse(tp, bp);
|
|
}
|
|
/*
|
|
* Here with bp and block set to the leftmost leaf node in the tree.
|
|
*/
|
|
room = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
|
|
i = 0;
|
|
/*
|
|
* Loop over all leaf nodes. Copy information to the extent records.
|
|
*/
|
|
for (;;) {
|
|
xfs_bmbt_rec_t *frp, *trp;
|
|
xfs_fsblock_t nextbno;
|
|
xfs_extnum_t num_recs;
|
|
xfs_extnum_t start;
|
|
|
|
|
|
num_recs = be16_to_cpu(block->bb_numrecs);
|
|
if (unlikely(i + num_recs > room)) {
|
|
ASSERT(i + num_recs <= room);
|
|
xfs_fs_repair_cmn_err(CE_WARN, ip->i_mount,
|
|
"corrupt dinode %Lu, (btree extents).",
|
|
(unsigned long long) ip->i_ino);
|
|
XFS_ERROR_REPORT("xfs_bmap_read_extents(1)",
|
|
XFS_ERRLEVEL_LOW,
|
|
ip->i_mount);
|
|
goto error0;
|
|
}
|
|
XFS_WANT_CORRUPTED_GOTO(
|
|
XFS_BMAP_SANITY_CHECK(mp, block, 0),
|
|
error0);
|
|
/*
|
|
* Read-ahead the next leaf block, if any.
|
|
*/
|
|
nextbno = be64_to_cpu(block->bb_rightsib);
|
|
if (nextbno != NULLFSBLOCK)
|
|
xfs_btree_reada_bufl(mp, nextbno, 1);
|
|
/*
|
|
* Copy records into the extent records.
|
|
*/
|
|
frp = XFS_BTREE_REC_ADDR(mp->m_sb.sb_blocksize, xfs_bmbt,
|
|
block, 1, mp->m_bmap_dmxr[0]);
|
|
start = i;
|
|
for (j = 0; j < num_recs; j++, i++, frp++) {
|
|
trp = xfs_iext_get_ext(ifp, i);
|
|
trp->l0 = INT_GET(frp->l0, ARCH_CONVERT);
|
|
trp->l1 = INT_GET(frp->l1, ARCH_CONVERT);
|
|
}
|
|
if (exntf == XFS_EXTFMT_NOSTATE) {
|
|
/*
|
|
* Check all attribute bmap btree records and
|
|
* any "older" data bmap btree records for a
|
|
* set bit in the "extent flag" position.
|
|
*/
|
|
if (unlikely(xfs_check_nostate_extents(ifp,
|
|
start, num_recs))) {
|
|
XFS_ERROR_REPORT("xfs_bmap_read_extents(2)",
|
|
XFS_ERRLEVEL_LOW,
|
|
ip->i_mount);
|
|
goto error0;
|
|
}
|
|
}
|
|
xfs_trans_brelse(tp, bp);
|
|
bno = nextbno;
|
|
/*
|
|
* If we've reached the end, stop.
|
|
*/
|
|
if (bno == NULLFSBLOCK)
|
|
break;
|
|
if ((error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp,
|
|
XFS_BMAP_BTREE_REF)))
|
|
return error;
|
|
block = XFS_BUF_TO_BMBT_BLOCK(bp);
|
|
}
|
|
ASSERT(i == (ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t)));
|
|
ASSERT(i == XFS_IFORK_NEXTENTS(ip, whichfork));
|
|
xfs_bmap_trace_exlist(fname, ip, i, whichfork);
|
|
return 0;
|
|
error0:
|
|
xfs_trans_brelse(tp, bp);
|
|
return XFS_ERROR(EFSCORRUPTED);
|
|
}
|
|
|
|
#ifdef XFS_BMAP_TRACE
|
|
/*
|
|
* Add bmap trace insert entries for all the contents of the extent records.
|
|
*/
|
|
void
|
|
xfs_bmap_trace_exlist(
|
|
char *fname, /* function name */
|
|
xfs_inode_t *ip, /* incore inode pointer */
|
|
xfs_extnum_t cnt, /* count of entries in the list */
|
|
int whichfork) /* data or attr fork */
|
|
{
|
|
xfs_bmbt_rec_t *ep; /* current extent record */
|
|
xfs_extnum_t idx; /* extent record index */
|
|
xfs_ifork_t *ifp; /* inode fork pointer */
|
|
xfs_bmbt_irec_t s; /* file extent record */
|
|
|
|
ifp = XFS_IFORK_PTR(ip, whichfork);
|
|
ASSERT(cnt == (ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t)));
|
|
for (idx = 0; idx < cnt; idx++) {
|
|
ep = xfs_iext_get_ext(ifp, idx);
|
|
xfs_bmbt_get_all(ep, &s);
|
|
xfs_bmap_trace_insert(fname, "exlist", ip, idx, 1, &s, NULL,
|
|
whichfork);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
#ifdef DEBUG
|
|
/*
|
|
* Validate that the bmbt_irecs being returned from bmapi are valid
|
|
* given the callers original parameters. Specifically check the
|
|
* ranges of the returned irecs to ensure that they only extent beyond
|
|
* the given parameters if the XFS_BMAPI_ENTIRE flag was set.
|
|
*/
|
|
STATIC void
|
|
xfs_bmap_validate_ret(
|
|
xfs_fileoff_t bno,
|
|
xfs_filblks_t len,
|
|
int flags,
|
|
xfs_bmbt_irec_t *mval,
|
|
int nmap,
|
|
int ret_nmap)
|
|
{
|
|
int i; /* index to map values */
|
|
|
|
ASSERT(ret_nmap <= nmap);
|
|
|
|
for (i = 0; i < ret_nmap; i++) {
|
|
ASSERT(mval[i].br_blockcount > 0);
|
|
if (!(flags & XFS_BMAPI_ENTIRE)) {
|
|
ASSERT(mval[i].br_startoff >= bno);
|
|
ASSERT(mval[i].br_blockcount <= len);
|
|
ASSERT(mval[i].br_startoff + mval[i].br_blockcount <=
|
|
bno + len);
|
|
} else {
|
|
ASSERT(mval[i].br_startoff < bno + len);
|
|
ASSERT(mval[i].br_startoff + mval[i].br_blockcount >
|
|
bno);
|
|
}
|
|
ASSERT(i == 0 ||
|
|
mval[i - 1].br_startoff + mval[i - 1].br_blockcount ==
|
|
mval[i].br_startoff);
|
|
if ((flags & XFS_BMAPI_WRITE) && !(flags & XFS_BMAPI_DELAY))
|
|
ASSERT(mval[i].br_startblock != DELAYSTARTBLOCK &&
|
|
mval[i].br_startblock != HOLESTARTBLOCK);
|
|
ASSERT(mval[i].br_state == XFS_EXT_NORM ||
|
|
mval[i].br_state == XFS_EXT_UNWRITTEN);
|
|
}
|
|
}
|
|
#endif /* DEBUG */
|
|
|
|
|
|
/*
|
|
* Map file blocks to filesystem blocks.
|
|
* File range is given by the bno/len pair.
|
|
* Adds blocks to file if a write ("flags & XFS_BMAPI_WRITE" set)
|
|
* into a hole or past eof.
|
|
* Only allocates blocks from a single allocation group,
|
|
* to avoid locking problems.
|
|
* The returned value in "firstblock" from the first call in a transaction
|
|
* must be remembered and presented to subsequent calls in "firstblock".
|
|
* An upper bound for the number of blocks to be allocated is supplied to
|
|
* the first call in "total"; if no allocation group has that many free
|
|
* blocks then the call will fail (return NULLFSBLOCK in "firstblock").
|
|
*/
|
|
int /* error */
|
|
xfs_bmapi(
|
|
xfs_trans_t *tp, /* transaction pointer */
|
|
xfs_inode_t *ip, /* incore inode */
|
|
xfs_fileoff_t bno, /* starting file offs. mapped */
|
|
xfs_filblks_t len, /* length to map in file */
|
|
int flags, /* XFS_BMAPI_... */
|
|
xfs_fsblock_t *firstblock, /* first allocated block
|
|
controls a.g. for allocs */
|
|
xfs_extlen_t total, /* total blocks needed */
|
|
xfs_bmbt_irec_t *mval, /* output: map values */
|
|
int *nmap, /* i/o: mval size/count */
|
|
xfs_bmap_free_t *flist, /* i/o: list extents to free */
|
|
xfs_extdelta_t *delta) /* o: change made to incore extents */
|
|
{
|
|
xfs_fsblock_t abno; /* allocated block number */
|
|
xfs_extlen_t alen; /* allocated extent length */
|
|
xfs_fileoff_t aoff; /* allocated file offset */
|
|
xfs_bmalloca_t bma; /* args for xfs_bmap_alloc */
|
|
xfs_btree_cur_t *cur; /* bmap btree cursor */
|
|
xfs_fileoff_t end; /* end of mapped file region */
|
|
int eof; /* we've hit the end of extents */
|
|
xfs_bmbt_rec_t *ep; /* extent record pointer */
|
|
int error; /* error return */
|
|
xfs_bmbt_irec_t got; /* current file extent record */
|
|
xfs_ifork_t *ifp; /* inode fork pointer */
|
|
xfs_extlen_t indlen; /* indirect blocks length */
|
|
xfs_extnum_t lastx; /* last useful extent number */
|
|
int logflags; /* flags for transaction logging */
|
|
xfs_extlen_t minleft; /* min blocks left after allocation */
|
|
xfs_extlen_t minlen; /* min allocation size */
|
|
xfs_mount_t *mp; /* xfs mount structure */
|
|
int n; /* current extent index */
|
|
int nallocs; /* number of extents alloc\'d */
|
|
xfs_extnum_t nextents; /* number of extents in file */
|
|
xfs_fileoff_t obno; /* old block number (offset) */
|
|
xfs_bmbt_irec_t prev; /* previous file extent record */
|
|
int tmp_logflags; /* temp flags holder */
|
|
int whichfork; /* data or attr fork */
|
|
char inhole; /* current location is hole in file */
|
|
char wasdelay; /* old extent was delayed */
|
|
char wr; /* this is a write request */
|
|
char rt; /* this is a realtime file */
|
|
#ifdef DEBUG
|
|
xfs_fileoff_t orig_bno; /* original block number value */
|
|
int orig_flags; /* original flags arg value */
|
|
xfs_filblks_t orig_len; /* original value of len arg */
|
|
xfs_bmbt_irec_t *orig_mval; /* original value of mval */
|
|
int orig_nmap; /* original value of *nmap */
|
|
|
|
orig_bno = bno;
|
|
orig_len = len;
|
|
orig_flags = flags;
|
|
orig_mval = mval;
|
|
orig_nmap = *nmap;
|
|
#endif
|
|
ASSERT(*nmap >= 1);
|
|
ASSERT(*nmap <= XFS_BMAP_MAX_NMAP || !(flags & XFS_BMAPI_WRITE));
|
|
whichfork = (flags & XFS_BMAPI_ATTRFORK) ?
|
|
XFS_ATTR_FORK : XFS_DATA_FORK;
|
|
mp = ip->i_mount;
|
|
if (unlikely(XFS_TEST_ERROR(
|
|
(XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS &&
|
|
XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE &&
|
|
XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_LOCAL),
|
|
mp, XFS_ERRTAG_BMAPIFORMAT, XFS_RANDOM_BMAPIFORMAT))) {
|
|
XFS_ERROR_REPORT("xfs_bmapi", XFS_ERRLEVEL_LOW, mp);
|
|
return XFS_ERROR(EFSCORRUPTED);
|
|
}
|
|
if (XFS_FORCED_SHUTDOWN(mp))
|
|
return XFS_ERROR(EIO);
|
|
rt = (whichfork == XFS_DATA_FORK) && XFS_IS_REALTIME_INODE(ip);
|
|
ifp = XFS_IFORK_PTR(ip, whichfork);
|
|
ASSERT(ifp->if_ext_max ==
|
|
XFS_IFORK_SIZE(ip, whichfork) / (uint)sizeof(xfs_bmbt_rec_t));
|
|
if ((wr = (flags & XFS_BMAPI_WRITE)) != 0)
|
|
XFS_STATS_INC(xs_blk_mapw);
|
|
else
|
|
XFS_STATS_INC(xs_blk_mapr);
|
|
/*
|
|
* IGSTATE flag is used to combine extents which
|
|
* differ only due to the state of the extents.
|
|
* This technique is used from xfs_getbmap()
|
|
* when the caller does not wish to see the
|
|
* separation (which is the default).
|
|
*
|
|
* This technique is also used when writing a
|
|
* buffer which has been partially written,
|
|
* (usually by being flushed during a chunkread),
|
|
* to ensure one write takes place. This also
|
|
* prevents a change in the xfs inode extents at
|
|
* this time, intentionally. This change occurs
|
|
* on completion of the write operation, in
|
|
* xfs_strat_comp(), where the xfs_bmapi() call
|
|
* is transactioned, and the extents combined.
|
|
*/
|
|
if ((flags & XFS_BMAPI_IGSTATE) && wr) /* if writing unwritten space */
|
|
wr = 0; /* no allocations are allowed */
|
|
ASSERT(wr || !(flags & XFS_BMAPI_DELAY));
|
|
logflags = 0;
|
|
nallocs = 0;
|
|
cur = NULL;
|
|
if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL) {
|
|
ASSERT(wr && tp);
|
|
if ((error = xfs_bmap_local_to_extents(tp, ip,
|
|
firstblock, total, &logflags, whichfork)))
|
|
goto error0;
|
|
}
|
|
if (wr && *firstblock == NULLFSBLOCK) {
|
|
if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE)
|
|
minleft = be16_to_cpu(ifp->if_broot->bb_level) + 1;
|
|
else
|
|
minleft = 1;
|
|
} else
|
|
minleft = 0;
|
|
if (!(ifp->if_flags & XFS_IFEXTENTS) &&
|
|
(error = xfs_iread_extents(tp, ip, whichfork)))
|
|
goto error0;
|
|
ep = xfs_bmap_search_extents(ip, bno, whichfork, &eof, &lastx, &got,
|
|
&prev);
|
|
nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
|
|
n = 0;
|
|
end = bno + len;
|
|
obno = bno;
|
|
bma.ip = NULL;
|
|
if (delta) {
|
|
delta->xed_startoff = NULLFILEOFF;
|
|
delta->xed_blockcount = 0;
|
|
}
|
|
while (bno < end && n < *nmap) {
|
|
/*
|
|
* Reading past eof, act as though there's a hole
|
|
* up to end.
|
|
*/
|
|
if (eof && !wr)
|
|
got.br_startoff = end;
|
|
inhole = eof || got.br_startoff > bno;
|
|
wasdelay = wr && !inhole && !(flags & XFS_BMAPI_DELAY) &&
|
|
ISNULLSTARTBLOCK(got.br_startblock);
|
|
/*
|
|
* First, deal with the hole before the allocated space
|
|
* that we found, if any.
|
|
*/
|
|
if (wr && (inhole || wasdelay)) {
|
|
/*
|
|
* For the wasdelay case, we could also just
|
|
* allocate the stuff asked for in this bmap call
|
|
* but that wouldn't be as good.
|
|
*/
|
|
if (wasdelay && !(flags & XFS_BMAPI_EXACT)) {
|
|
alen = (xfs_extlen_t)got.br_blockcount;
|
|
aoff = got.br_startoff;
|
|
if (lastx != NULLEXTNUM && lastx) {
|
|
ep = xfs_iext_get_ext(ifp, lastx - 1);
|
|
xfs_bmbt_get_all(ep, &prev);
|
|
}
|
|
} else if (wasdelay) {
|
|
alen = (xfs_extlen_t)
|
|
XFS_FILBLKS_MIN(len,
|
|
(got.br_startoff +
|
|
got.br_blockcount) - bno);
|
|
aoff = bno;
|
|
} else {
|
|
alen = (xfs_extlen_t)
|
|
XFS_FILBLKS_MIN(len, MAXEXTLEN);
|
|
if (!eof)
|
|
alen = (xfs_extlen_t)
|
|
XFS_FILBLKS_MIN(alen,
|
|
got.br_startoff - bno);
|
|
aoff = bno;
|
|
}
|
|
minlen = (flags & XFS_BMAPI_CONTIG) ? alen : 1;
|
|
if (flags & XFS_BMAPI_DELAY) {
|
|
xfs_extlen_t extsz;
|
|
|
|
/* Figure out the extent size, adjust alen */
|
|
if (rt) {
|
|
if (!(extsz = ip->i_d.di_extsize))
|
|
extsz = mp->m_sb.sb_rextsize;
|
|
} else {
|
|
extsz = ip->i_d.di_extsize;
|
|
}
|
|
if (extsz) {
|
|
error = xfs_bmap_extsize_align(mp,
|
|
&got, &prev, extsz,
|
|
rt, eof,
|
|
flags&XFS_BMAPI_DELAY,
|
|
flags&XFS_BMAPI_CONVERT,
|
|
&aoff, &alen);
|
|
ASSERT(!error);
|
|
}
|
|
|
|
if (rt)
|
|
extsz = alen / mp->m_sb.sb_rextsize;
|
|
|
|
/*
|
|
* Make a transaction-less quota reservation for
|
|
* delayed allocation blocks. This number gets
|
|
* adjusted later. We return if we haven't
|
|
* allocated blocks already inside this loop.
|
|
*/
|
|
if ((error = XFS_TRANS_RESERVE_QUOTA_NBLKS(
|
|
mp, NULL, ip, (long)alen, 0,
|
|
rt ? XFS_QMOPT_RES_RTBLKS :
|
|
XFS_QMOPT_RES_REGBLKS))) {
|
|
if (n == 0) {
|
|
*nmap = 0;
|
|
ASSERT(cur == NULL);
|
|
return error;
|
|
}
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Split changing sb for alen and indlen since
|
|
* they could be coming from different places.
|
|
*/
|
|
indlen = (xfs_extlen_t)
|
|
xfs_bmap_worst_indlen(ip, alen);
|
|
ASSERT(indlen > 0);
|
|
|
|
if (rt) {
|
|
error = xfs_mod_incore_sb(mp,
|
|
XFS_SBS_FREXTENTS,
|
|
-(extsz), (flags &
|
|
XFS_BMAPI_RSVBLOCKS));
|
|
} else {
|
|
error = xfs_mod_incore_sb(mp,
|
|
XFS_SBS_FDBLOCKS,
|
|
-(alen), (flags &
|
|
XFS_BMAPI_RSVBLOCKS));
|
|
}
|
|
if (!error) {
|
|
error = xfs_mod_incore_sb(mp,
|
|
XFS_SBS_FDBLOCKS,
|
|
-(indlen), (flags &
|
|
XFS_BMAPI_RSVBLOCKS));
|
|
if (error && rt)
|
|
xfs_mod_incore_sb(mp,
|
|
XFS_SBS_FREXTENTS,
|
|
extsz, (flags &
|
|
XFS_BMAPI_RSVBLOCKS));
|
|
else if (error)
|
|
xfs_mod_incore_sb(mp,
|
|
XFS_SBS_FDBLOCKS,
|
|
alen, (flags &
|
|
XFS_BMAPI_RSVBLOCKS));
|
|
}
|
|
|
|
if (error) {
|
|
if (XFS_IS_QUOTA_ON(mp))
|
|
/* unreserve the blocks now */
|
|
(void)
|
|
XFS_TRANS_UNRESERVE_QUOTA_NBLKS(
|
|
mp, NULL, ip,
|
|
(long)alen, 0, rt ?
|
|
XFS_QMOPT_RES_RTBLKS :
|
|
XFS_QMOPT_RES_REGBLKS);
|
|
break;
|
|
}
|
|
|
|
ip->i_delayed_blks += alen;
|
|
abno = NULLSTARTBLOCK(indlen);
|
|
} else {
|
|
/*
|
|
* If first time, allocate and fill in
|
|
* once-only bma fields.
|
|
*/
|
|
if (bma.ip == NULL) {
|
|
bma.tp = tp;
|
|
bma.ip = ip;
|
|
bma.prevp = &prev;
|
|
bma.gotp = &got;
|
|
bma.total = total;
|
|
bma.userdata = 0;
|
|
}
|
|
/* Indicate if this is the first user data
|
|
* in the file, or just any user data.
|
|
*/
|
|
if (!(flags & XFS_BMAPI_METADATA)) {
|
|
bma.userdata = (aoff == 0) ?
|
|
XFS_ALLOC_INITIAL_USER_DATA :
|
|
XFS_ALLOC_USERDATA;
|
|
}
|
|
/*
|
|
* Fill in changeable bma fields.
|
|
*/
|
|
bma.eof = eof;
|
|
bma.firstblock = *firstblock;
|
|
bma.alen = alen;
|
|
bma.off = aoff;
|
|
bma.conv = !!(flags & XFS_BMAPI_CONVERT);
|
|
bma.wasdel = wasdelay;
|
|
bma.minlen = minlen;
|
|
bma.low = flist->xbf_low;
|
|
bma.minleft = minleft;
|
|
/*
|
|
* Only want to do the alignment at the
|
|
* eof if it is userdata and allocation length
|
|
* is larger than a stripe unit.
|
|
*/
|
|
if (mp->m_dalign && alen >= mp->m_dalign &&
|
|
(!(flags & XFS_BMAPI_METADATA)) &&
|
|
(whichfork == XFS_DATA_FORK)) {
|
|
if ((error = xfs_bmap_isaeof(ip, aoff,
|
|
whichfork, &bma.aeof)))
|
|
goto error0;
|
|
} else
|
|
bma.aeof = 0;
|
|
/*
|
|
* Call allocator.
|
|
*/
|
|
if ((error = xfs_bmap_alloc(&bma)))
|
|
goto error0;
|
|
/*
|
|
* Copy out result fields.
|
|
*/
|
|
abno = bma.rval;
|
|
if ((flist->xbf_low = bma.low))
|
|
minleft = 0;
|
|
alen = bma.alen;
|
|
aoff = bma.off;
|
|
ASSERT(*firstblock == NULLFSBLOCK ||
|
|
XFS_FSB_TO_AGNO(mp, *firstblock) ==
|
|
XFS_FSB_TO_AGNO(mp, bma.firstblock) ||
|
|
(flist->xbf_low &&
|
|
XFS_FSB_TO_AGNO(mp, *firstblock) <
|
|
XFS_FSB_TO_AGNO(mp, bma.firstblock)));
|
|
*firstblock = bma.firstblock;
|
|
if (cur)
|
|
cur->bc_private.b.firstblock =
|
|
*firstblock;
|
|
if (abno == NULLFSBLOCK)
|
|
break;
|
|
if ((ifp->if_flags & XFS_IFBROOT) && !cur) {
|
|
cur = xfs_btree_init_cursor(mp,
|
|
tp, NULL, 0, XFS_BTNUM_BMAP,
|
|
ip, whichfork);
|
|
cur->bc_private.b.firstblock =
|
|
*firstblock;
|
|
cur->bc_private.b.flist = flist;
|
|
}
|
|
/*
|
|
* Bump the number of extents we've allocated
|
|
* in this call.
|
|
*/
|
|
nallocs++;
|
|
}
|
|
if (cur)
|
|
cur->bc_private.b.flags =
|
|
wasdelay ? XFS_BTCUR_BPRV_WASDEL : 0;
|
|
got.br_startoff = aoff;
|
|
got.br_startblock = abno;
|
|
got.br_blockcount = alen;
|
|
got.br_state = XFS_EXT_NORM; /* assume normal */
|
|
/*
|
|
* Determine state of extent, and the filesystem.
|
|
* A wasdelay extent has been initialized, so
|
|
* shouldn't be flagged as unwritten.
|
|
*/
|
|
if (wr && XFS_SB_VERSION_HASEXTFLGBIT(&mp->m_sb)) {
|
|
if (!wasdelay && (flags & XFS_BMAPI_PREALLOC))
|
|
got.br_state = XFS_EXT_UNWRITTEN;
|
|
}
|
|
error = xfs_bmap_add_extent(ip, lastx, &cur, &got,
|
|
firstblock, flist, &tmp_logflags, delta,
|
|
whichfork, (flags & XFS_BMAPI_RSVBLOCKS));
|
|
logflags |= tmp_logflags;
|
|
if (error)
|
|
goto error0;
|
|
lastx = ifp->if_lastex;
|
|
ep = xfs_iext_get_ext(ifp, lastx);
|
|
nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
|
|
xfs_bmbt_get_all(ep, &got);
|
|
ASSERT(got.br_startoff <= aoff);
|
|
ASSERT(got.br_startoff + got.br_blockcount >=
|
|
aoff + alen);
|
|
#ifdef DEBUG
|
|
if (flags & XFS_BMAPI_DELAY) {
|
|
ASSERT(ISNULLSTARTBLOCK(got.br_startblock));
|
|
ASSERT(STARTBLOCKVAL(got.br_startblock) > 0);
|
|
}
|
|
ASSERT(got.br_state == XFS_EXT_NORM ||
|
|
got.br_state == XFS_EXT_UNWRITTEN);
|
|
#endif
|
|
/*
|
|
* Fall down into the found allocated space case.
|
|
*/
|
|
} else if (inhole) {
|
|
/*
|
|
* Reading in a hole.
|
|
*/
|
|
mval->br_startoff = bno;
|
|
mval->br_startblock = HOLESTARTBLOCK;
|
|
mval->br_blockcount =
|
|
XFS_FILBLKS_MIN(len, got.br_startoff - bno);
|
|
mval->br_state = XFS_EXT_NORM;
|
|
bno += mval->br_blockcount;
|
|
len -= mval->br_blockcount;
|
|
mval++;
|
|
n++;
|
|
continue;
|
|
}
|
|
/*
|
|
* Then deal with the allocated space we found.
|
|
*/
|
|
ASSERT(ep != NULL);
|
|
if (!(flags & XFS_BMAPI_ENTIRE) &&
|
|
(got.br_startoff + got.br_blockcount > obno)) {
|
|
if (obno > bno)
|
|
bno = obno;
|
|
ASSERT((bno >= obno) || (n == 0));
|
|
ASSERT(bno < end);
|
|
mval->br_startoff = bno;
|
|
if (ISNULLSTARTBLOCK(got.br_startblock)) {
|
|
ASSERT(!wr || (flags & XFS_BMAPI_DELAY));
|
|
mval->br_startblock = DELAYSTARTBLOCK;
|
|
} else
|
|
mval->br_startblock =
|
|
got.br_startblock +
|
|
(bno - got.br_startoff);
|
|
/*
|
|
* Return the minimum of what we got and what we
|
|
* asked for for the length. We can use the len
|
|
* variable here because it is modified below
|
|
* and we could have been there before coming
|
|
* here if the first part of the allocation
|
|
* didn't overlap what was asked for.
|
|
*/
|
|
mval->br_blockcount =
|
|
XFS_FILBLKS_MIN(end - bno, got.br_blockcount -
|
|
(bno - got.br_startoff));
|
|
mval->br_state = got.br_state;
|
|
ASSERT(mval->br_blockcount <= len);
|
|
} else {
|
|
*mval = got;
|
|
if (ISNULLSTARTBLOCK(mval->br_startblock)) {
|
|
ASSERT(!wr || (flags & XFS_BMAPI_DELAY));
|
|
mval->br_startblock = DELAYSTARTBLOCK;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Check if writing previously allocated but
|
|
* unwritten extents.
|
|
*/
|
|
if (wr && mval->br_state == XFS_EXT_UNWRITTEN &&
|
|
((flags & (XFS_BMAPI_PREALLOC|XFS_BMAPI_DELAY)) == 0)) {
|
|
/*
|
|
* Modify (by adding) the state flag, if writing.
|
|
*/
|
|
ASSERT(mval->br_blockcount <= len);
|
|
if ((ifp->if_flags & XFS_IFBROOT) && !cur) {
|
|
cur = xfs_btree_init_cursor(mp,
|
|
tp, NULL, 0, XFS_BTNUM_BMAP,
|
|
ip, whichfork);
|
|
cur->bc_private.b.firstblock =
|
|
*firstblock;
|
|
cur->bc_private.b.flist = flist;
|
|
}
|
|
mval->br_state = XFS_EXT_NORM;
|
|
error = xfs_bmap_add_extent(ip, lastx, &cur, mval,
|
|
firstblock, flist, &tmp_logflags, delta,
|
|
whichfork, (flags & XFS_BMAPI_RSVBLOCKS));
|
|
logflags |= tmp_logflags;
|
|
if (error)
|
|
goto error0;
|
|
lastx = ifp->if_lastex;
|
|
ep = xfs_iext_get_ext(ifp, lastx);
|
|
nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
|
|
xfs_bmbt_get_all(ep, &got);
|
|
/*
|
|
* We may have combined previously unwritten
|
|
* space with written space, so generate
|
|
* another request.
|
|
*/
|
|
if (mval->br_blockcount < len)
|
|
continue;
|
|
}
|
|
|
|
ASSERT((flags & XFS_BMAPI_ENTIRE) ||
|
|
((mval->br_startoff + mval->br_blockcount) <= end));
|
|
ASSERT((flags & XFS_BMAPI_ENTIRE) ||
|
|
(mval->br_blockcount <= len) ||
|
|
(mval->br_startoff < obno));
|
|
bno = mval->br_startoff + mval->br_blockcount;
|
|
len = end - bno;
|
|
if (n > 0 && mval->br_startoff == mval[-1].br_startoff) {
|
|
ASSERT(mval->br_startblock == mval[-1].br_startblock);
|
|
ASSERT(mval->br_blockcount > mval[-1].br_blockcount);
|
|
ASSERT(mval->br_state == mval[-1].br_state);
|
|
mval[-1].br_blockcount = mval->br_blockcount;
|
|
mval[-1].br_state = mval->br_state;
|
|
} else if (n > 0 && mval->br_startblock != DELAYSTARTBLOCK &&
|
|
mval[-1].br_startblock != DELAYSTARTBLOCK &&
|
|
mval[-1].br_startblock != HOLESTARTBLOCK &&
|
|
mval->br_startblock ==
|
|
mval[-1].br_startblock + mval[-1].br_blockcount &&
|
|
((flags & XFS_BMAPI_IGSTATE) ||
|
|
mval[-1].br_state == mval->br_state)) {
|
|
ASSERT(mval->br_startoff ==
|
|
mval[-1].br_startoff + mval[-1].br_blockcount);
|
|
mval[-1].br_blockcount += mval->br_blockcount;
|
|
} else if (n > 0 &&
|
|
mval->br_startblock == DELAYSTARTBLOCK &&
|
|
mval[-1].br_startblock == DELAYSTARTBLOCK &&
|
|
mval->br_startoff ==
|
|
mval[-1].br_startoff + mval[-1].br_blockcount) {
|
|
mval[-1].br_blockcount += mval->br_blockcount;
|
|
mval[-1].br_state = mval->br_state;
|
|
} else if (!((n == 0) &&
|
|
((mval->br_startoff + mval->br_blockcount) <=
|
|
obno))) {
|
|
mval++;
|
|
n++;
|
|
}
|
|
/*
|
|
* If we're done, stop now. Stop when we've allocated
|
|
* XFS_BMAP_MAX_NMAP extents no matter what. Otherwise
|
|
* the transaction may get too big.
|
|
*/
|
|
if (bno >= end || n >= *nmap || nallocs >= *nmap)
|
|
break;
|
|
/*
|
|
* Else go on to the next record.
|
|
*/
|
|
ep = xfs_iext_get_ext(ifp, ++lastx);
|
|
if (lastx >= nextents) {
|
|
eof = 1;
|
|
prev = got;
|
|
} else
|
|
xfs_bmbt_get_all(ep, &got);
|
|
}
|
|
ifp->if_lastex = lastx;
|
|
*nmap = n;
|
|
/*
|
|
* Transform from btree to extents, give it cur.
|
|
*/
|
|
if (tp && XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE &&
|
|
XFS_IFORK_NEXTENTS(ip, whichfork) <= ifp->if_ext_max) {
|
|
ASSERT(wr && cur);
|
|
error = xfs_bmap_btree_to_extents(tp, ip, cur,
|
|
&tmp_logflags, whichfork);
|
|
logflags |= tmp_logflags;
|
|
if (error)
|
|
goto error0;
|
|
}
|
|
ASSERT(ifp->if_ext_max ==
|
|
XFS_IFORK_SIZE(ip, whichfork) / (uint)sizeof(xfs_bmbt_rec_t));
|
|
ASSERT(XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE ||
|
|
XFS_IFORK_NEXTENTS(ip, whichfork) > ifp->if_ext_max);
|
|
error = 0;
|
|
if (delta && delta->xed_startoff != NULLFILEOFF) {
|
|
/* A change was actually made.
|
|
* Note that delta->xed_blockount is an offset at this
|
|
* point and needs to be converted to a block count.
|
|
*/
|
|
ASSERT(delta->xed_blockcount > delta->xed_startoff);
|
|
delta->xed_blockcount -= delta->xed_startoff;
|
|
}
|
|
error0:
|
|
/*
|
|
* Log everything. Do this after conversion, there's no point in
|
|
* logging the extent records if we've converted to btree format.
|
|
*/
|
|
if ((logflags & XFS_ILOG_FEXT(whichfork)) &&
|
|
XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS)
|
|
logflags &= ~XFS_ILOG_FEXT(whichfork);
|
|
else if ((logflags & XFS_ILOG_FBROOT(whichfork)) &&
|
|
XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE)
|
|
logflags &= ~XFS_ILOG_FBROOT(whichfork);
|
|
/*
|
|
* Log whatever the flags say, even if error. Otherwise we might miss
|
|
* detecting a case where the data is changed, there's an error,
|
|
* and it's not logged so we don't shutdown when we should.
|
|
*/
|
|
if (logflags) {
|
|
ASSERT(tp && wr);
|
|
xfs_trans_log_inode(tp, ip, logflags);
|
|
}
|
|
if (cur) {
|
|
if (!error) {
|
|
ASSERT(*firstblock == NULLFSBLOCK ||
|
|
XFS_FSB_TO_AGNO(mp, *firstblock) ==
|
|
XFS_FSB_TO_AGNO(mp,
|
|
cur->bc_private.b.firstblock) ||
|
|
(flist->xbf_low &&
|
|
XFS_FSB_TO_AGNO(mp, *firstblock) <
|
|
XFS_FSB_TO_AGNO(mp,
|
|
cur->bc_private.b.firstblock)));
|
|
*firstblock = cur->bc_private.b.firstblock;
|
|
}
|
|
xfs_btree_del_cursor(cur,
|
|
error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR);
|
|
}
|
|
if (!error)
|
|
xfs_bmap_validate_ret(orig_bno, orig_len, orig_flags, orig_mval,
|
|
orig_nmap, *nmap);
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Map file blocks to filesystem blocks, simple version.
|
|
* One block (extent) only, read-only.
|
|
* For flags, only the XFS_BMAPI_ATTRFORK flag is examined.
|
|
* For the other flag values, the effect is as if XFS_BMAPI_METADATA
|
|
* was set and all the others were clear.
|
|
*/
|
|
int /* error */
|
|
xfs_bmapi_single(
|
|
xfs_trans_t *tp, /* transaction pointer */
|
|
xfs_inode_t *ip, /* incore inode */
|
|
int whichfork, /* data or attr fork */
|
|
xfs_fsblock_t *fsb, /* output: mapped block */
|
|
xfs_fileoff_t bno) /* starting file offs. mapped */
|
|
{
|
|
int eof; /* we've hit the end of extents */
|
|
int error; /* error return */
|
|
xfs_bmbt_irec_t got; /* current file extent record */
|
|
xfs_ifork_t *ifp; /* inode fork pointer */
|
|
xfs_extnum_t lastx; /* last useful extent number */
|
|
xfs_bmbt_irec_t prev; /* previous file extent record */
|
|
|
|
ifp = XFS_IFORK_PTR(ip, whichfork);
|
|
if (unlikely(
|
|
XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE &&
|
|
XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS)) {
|
|
XFS_ERROR_REPORT("xfs_bmapi_single", XFS_ERRLEVEL_LOW,
|
|
ip->i_mount);
|
|
return XFS_ERROR(EFSCORRUPTED);
|
|
}
|
|
if (XFS_FORCED_SHUTDOWN(ip->i_mount))
|
|
return XFS_ERROR(EIO);
|
|
XFS_STATS_INC(xs_blk_mapr);
|
|
if (!(ifp->if_flags & XFS_IFEXTENTS) &&
|
|
(error = xfs_iread_extents(tp, ip, whichfork)))
|
|
return error;
|
|
(void)xfs_bmap_search_extents(ip, bno, whichfork, &eof, &lastx, &got,
|
|
&prev);
|
|
/*
|
|
* Reading past eof, act as though there's a hole
|
|
* up to end.
|
|
*/
|
|
if (eof || got.br_startoff > bno) {
|
|
*fsb = NULLFSBLOCK;
|
|
return 0;
|
|
}
|
|
ASSERT(!ISNULLSTARTBLOCK(got.br_startblock));
|
|
ASSERT(bno < got.br_startoff + got.br_blockcount);
|
|
*fsb = got.br_startblock + (bno - got.br_startoff);
|
|
ifp->if_lastex = lastx;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Unmap (remove) blocks from a file.
|
|
* If nexts is nonzero then the number of extents to remove is limited to
|
|
* that value. If not all extents in the block range can be removed then
|
|
* *done is set.
|
|
*/
|
|
int /* error */
|
|
xfs_bunmapi(
|
|
xfs_trans_t *tp, /* transaction pointer */
|
|
struct xfs_inode *ip, /* incore inode */
|
|
xfs_fileoff_t bno, /* starting offset to unmap */
|
|
xfs_filblks_t len, /* length to unmap in file */
|
|
int flags, /* misc flags */
|
|
xfs_extnum_t nexts, /* number of extents max */
|
|
xfs_fsblock_t *firstblock, /* first allocated block
|
|
controls a.g. for allocs */
|
|
xfs_bmap_free_t *flist, /* i/o: list extents to free */
|
|
xfs_extdelta_t *delta, /* o: change made to incore
|
|
extents */
|
|
int *done) /* set if not done yet */
|
|
{
|
|
xfs_btree_cur_t *cur; /* bmap btree cursor */
|
|
xfs_bmbt_irec_t del; /* extent being deleted */
|
|
int eof; /* is deleting at eof */
|
|
xfs_bmbt_rec_t *ep; /* extent record pointer */
|
|
int error; /* error return value */
|
|
xfs_extnum_t extno; /* extent number in list */
|
|
xfs_bmbt_irec_t got; /* current extent record */
|
|
xfs_ifork_t *ifp; /* inode fork pointer */
|
|
int isrt; /* freeing in rt area */
|
|
xfs_extnum_t lastx; /* last extent index used */
|
|
int logflags; /* transaction logging flags */
|
|
xfs_extlen_t mod; /* rt extent offset */
|
|
xfs_mount_t *mp; /* mount structure */
|
|
xfs_extnum_t nextents; /* number of file extents */
|
|
xfs_bmbt_irec_t prev; /* previous extent record */
|
|
xfs_fileoff_t start; /* first file offset deleted */
|
|
int tmp_logflags; /* partial logging flags */
|
|
int wasdel; /* was a delayed alloc extent */
|
|
int whichfork; /* data or attribute fork */
|
|
int rsvd; /* OK to allocate reserved blocks */
|
|
xfs_fsblock_t sum;
|
|
|
|
xfs_bunmap_trace(ip, bno, len, flags, (inst_t *)__return_address);
|
|
whichfork = (flags & XFS_BMAPI_ATTRFORK) ?
|
|
XFS_ATTR_FORK : XFS_DATA_FORK;
|
|
ifp = XFS_IFORK_PTR(ip, whichfork);
|
|
if (unlikely(
|
|
XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS &&
|
|
XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE)) {
|
|
XFS_ERROR_REPORT("xfs_bunmapi", XFS_ERRLEVEL_LOW,
|
|
ip->i_mount);
|
|
return XFS_ERROR(EFSCORRUPTED);
|
|
}
|
|
mp = ip->i_mount;
|
|
if (XFS_FORCED_SHUTDOWN(mp))
|
|
return XFS_ERROR(EIO);
|
|
rsvd = (flags & XFS_BMAPI_RSVBLOCKS) != 0;
|
|
ASSERT(len > 0);
|
|
ASSERT(nexts >= 0);
|
|
ASSERT(ifp->if_ext_max ==
|
|
XFS_IFORK_SIZE(ip, whichfork) / (uint)sizeof(xfs_bmbt_rec_t));
|
|
if (!(ifp->if_flags & XFS_IFEXTENTS) &&
|
|
(error = xfs_iread_extents(tp, ip, whichfork)))
|
|
return error;
|
|
nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
|
|
if (nextents == 0) {
|
|
*done = 1;
|
|
return 0;
|
|
}
|
|
XFS_STATS_INC(xs_blk_unmap);
|
|
isrt = (whichfork == XFS_DATA_FORK) && XFS_IS_REALTIME_INODE(ip);
|
|
start = bno;
|
|
bno = start + len - 1;
|
|
ep = xfs_bmap_search_extents(ip, bno, whichfork, &eof, &lastx, &got,
|
|
&prev);
|
|
if (delta) {
|
|
delta->xed_startoff = NULLFILEOFF;
|
|
delta->xed_blockcount = 0;
|
|
}
|
|
/*
|
|
* Check to see if the given block number is past the end of the
|
|
* file, back up to the last block if so...
|
|
*/
|
|
if (eof) {
|
|
ep = xfs_iext_get_ext(ifp, --lastx);
|
|
xfs_bmbt_get_all(ep, &got);
|
|
bno = got.br_startoff + got.br_blockcount - 1;
|
|
}
|
|
logflags = 0;
|
|
if (ifp->if_flags & XFS_IFBROOT) {
|
|
ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE);
|
|
cur = xfs_btree_init_cursor(mp, tp, NULL, 0, XFS_BTNUM_BMAP, ip,
|
|
whichfork);
|
|
cur->bc_private.b.firstblock = *firstblock;
|
|
cur->bc_private.b.flist = flist;
|
|
cur->bc_private.b.flags = 0;
|
|
} else
|
|
cur = NULL;
|
|
extno = 0;
|
|
while (bno != (xfs_fileoff_t)-1 && bno >= start && lastx >= 0 &&
|
|
(nexts == 0 || extno < nexts)) {
|
|
/*
|
|
* Is the found extent after a hole in which bno lives?
|
|
* Just back up to the previous extent, if so.
|
|
*/
|
|
if (got.br_startoff > bno) {
|
|
if (--lastx < 0)
|
|
break;
|
|
ep = xfs_iext_get_ext(ifp, lastx);
|
|
xfs_bmbt_get_all(ep, &got);
|
|
}
|
|
/*
|
|
* Is the last block of this extent before the range
|
|
* we're supposed to delete? If so, we're done.
|
|
*/
|
|
bno = XFS_FILEOFF_MIN(bno,
|
|
got.br_startoff + got.br_blockcount - 1);
|
|
if (bno < start)
|
|
break;
|
|
/*
|
|
* Then deal with the (possibly delayed) allocated space
|
|
* we found.
|
|
*/
|
|
ASSERT(ep != NULL);
|
|
del = got;
|
|
wasdel = ISNULLSTARTBLOCK(del.br_startblock);
|
|
if (got.br_startoff < start) {
|
|
del.br_startoff = start;
|
|
del.br_blockcount -= start - got.br_startoff;
|
|
if (!wasdel)
|
|
del.br_startblock += start - got.br_startoff;
|
|
}
|
|
if (del.br_startoff + del.br_blockcount > bno + 1)
|
|
del.br_blockcount = bno + 1 - del.br_startoff;
|
|
sum = del.br_startblock + del.br_blockcount;
|
|
if (isrt &&
|
|
(mod = do_mod(sum, mp->m_sb.sb_rextsize))) {
|
|
/*
|
|
* Realtime extent not lined up at the end.
|
|
* The extent could have been split into written
|
|
* and unwritten pieces, or we could just be
|
|
* unmapping part of it. But we can't really
|
|
* get rid of part of a realtime extent.
|
|
*/
|
|
if (del.br_state == XFS_EXT_UNWRITTEN ||
|
|
!XFS_SB_VERSION_HASEXTFLGBIT(&mp->m_sb)) {
|
|
/*
|
|
* This piece is unwritten, or we're not
|
|
* using unwritten extents. Skip over it.
|
|
*/
|
|
ASSERT(bno >= mod);
|
|
bno -= mod > del.br_blockcount ?
|
|
del.br_blockcount : mod;
|
|
if (bno < got.br_startoff) {
|
|
if (--lastx >= 0)
|
|
xfs_bmbt_get_all(xfs_iext_get_ext(
|
|
ifp, lastx), &got);
|
|
}
|
|
continue;
|
|
}
|
|
/*
|
|
* It's written, turn it unwritten.
|
|
* This is better than zeroing it.
|
|
*/
|
|
ASSERT(del.br_state == XFS_EXT_NORM);
|
|
ASSERT(xfs_trans_get_block_res(tp) > 0);
|
|
/*
|
|
* If this spans a realtime extent boundary,
|
|
* chop it back to the start of the one we end at.
|
|
*/
|
|
if (del.br_blockcount > mod) {
|
|
del.br_startoff += del.br_blockcount - mod;
|
|
del.br_startblock += del.br_blockcount - mod;
|
|
del.br_blockcount = mod;
|
|
}
|
|
del.br_state = XFS_EXT_UNWRITTEN;
|
|
error = xfs_bmap_add_extent(ip, lastx, &cur, &del,
|
|
firstblock, flist, &logflags, delta,
|
|
XFS_DATA_FORK, 0);
|
|
if (error)
|
|
goto error0;
|
|
goto nodelete;
|
|
}
|
|
if (isrt && (mod = do_mod(del.br_startblock, mp->m_sb.sb_rextsize))) {
|
|
/*
|
|
* Realtime extent is lined up at the end but not
|
|
* at the front. We'll get rid of full extents if
|
|
* we can.
|
|
*/
|
|
mod = mp->m_sb.sb_rextsize - mod;
|
|
if (del.br_blockcount > mod) {
|
|
del.br_blockcount -= mod;
|
|
del.br_startoff += mod;
|
|
del.br_startblock += mod;
|
|
} else if ((del.br_startoff == start &&
|
|
(del.br_state == XFS_EXT_UNWRITTEN ||
|
|
xfs_trans_get_block_res(tp) == 0)) ||
|
|
!XFS_SB_VERSION_HASEXTFLGBIT(&mp->m_sb)) {
|
|
/*
|
|
* Can't make it unwritten. There isn't
|
|
* a full extent here so just skip it.
|
|
*/
|
|
ASSERT(bno >= del.br_blockcount);
|
|
bno -= del.br_blockcount;
|
|
if (bno < got.br_startoff) {
|
|
if (--lastx >= 0)
|
|
xfs_bmbt_get_all(--ep, &got);
|
|
}
|
|
continue;
|
|
} else if (del.br_state == XFS_EXT_UNWRITTEN) {
|
|
/*
|
|
* This one is already unwritten.
|
|
* It must have a written left neighbor.
|
|
* Unwrite the killed part of that one and
|
|
* try again.
|
|
*/
|
|
ASSERT(lastx > 0);
|
|
xfs_bmbt_get_all(xfs_iext_get_ext(ifp,
|
|
lastx - 1), &prev);
|
|
ASSERT(prev.br_state == XFS_EXT_NORM);
|
|
ASSERT(!ISNULLSTARTBLOCK(prev.br_startblock));
|
|
ASSERT(del.br_startblock ==
|
|
prev.br_startblock + prev.br_blockcount);
|
|
if (prev.br_startoff < start) {
|
|
mod = start - prev.br_startoff;
|
|
prev.br_blockcount -= mod;
|
|
prev.br_startblock += mod;
|
|
prev.br_startoff = start;
|
|
}
|
|
prev.br_state = XFS_EXT_UNWRITTEN;
|
|
error = xfs_bmap_add_extent(ip, lastx - 1, &cur,
|
|
&prev, firstblock, flist, &logflags,
|
|
delta, XFS_DATA_FORK, 0);
|
|
if (error)
|
|
goto error0;
|
|
goto nodelete;
|
|
} else {
|
|
ASSERT(del.br_state == XFS_EXT_NORM);
|
|
del.br_state = XFS_EXT_UNWRITTEN;
|
|
error = xfs_bmap_add_extent(ip, lastx, &cur,
|
|
&del, firstblock, flist, &logflags,
|
|
delta, XFS_DATA_FORK, 0);
|
|
if (error)
|
|
goto error0;
|
|
goto nodelete;
|
|
}
|
|
}
|
|
if (wasdel) {
|
|
ASSERT(STARTBLOCKVAL(del.br_startblock) > 0);
|
|
/* Update realtime/data freespace, unreserve quota */
|
|
if (isrt) {
|
|
xfs_filblks_t rtexts;
|
|
|
|
rtexts = XFS_FSB_TO_B(mp, del.br_blockcount);
|
|
do_div(rtexts, mp->m_sb.sb_rextsize);
|
|
xfs_mod_incore_sb(mp, XFS_SBS_FREXTENTS,
|
|
(int)rtexts, rsvd);
|
|
(void)XFS_TRANS_RESERVE_QUOTA_NBLKS(mp,
|
|
NULL, ip, -((long)del.br_blockcount), 0,
|
|
XFS_QMOPT_RES_RTBLKS);
|
|
} else {
|
|
xfs_mod_incore_sb(mp, XFS_SBS_FDBLOCKS,
|
|
(int)del.br_blockcount, rsvd);
|
|
(void)XFS_TRANS_RESERVE_QUOTA_NBLKS(mp,
|
|
NULL, ip, -((long)del.br_blockcount), 0,
|
|
XFS_QMOPT_RES_REGBLKS);
|
|
}
|
|
ip->i_delayed_blks -= del.br_blockcount;
|
|
if (cur)
|
|
cur->bc_private.b.flags |=
|
|
XFS_BTCUR_BPRV_WASDEL;
|
|
} else if (cur)
|
|
cur->bc_private.b.flags &= ~XFS_BTCUR_BPRV_WASDEL;
|
|
/*
|
|
* If it's the case where the directory code is running
|
|
* with no block reservation, and the deleted block is in
|
|
* the middle of its extent, and the resulting insert
|
|
* of an extent would cause transformation to btree format,
|
|
* then reject it. The calling code will then swap
|
|
* blocks around instead.
|
|
* We have to do this now, rather than waiting for the
|
|
* conversion to btree format, since the transaction
|
|
* will be dirty.
|
|
*/
|
|
if (!wasdel && xfs_trans_get_block_res(tp) == 0 &&
|
|
XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS &&
|
|
XFS_IFORK_NEXTENTS(ip, whichfork) >= ifp->if_ext_max &&
|
|
del.br_startoff > got.br_startoff &&
|
|
del.br_startoff + del.br_blockcount <
|
|
got.br_startoff + got.br_blockcount) {
|
|
error = XFS_ERROR(ENOSPC);
|
|
goto error0;
|
|
}
|
|
error = xfs_bmap_del_extent(ip, tp, lastx, flist, cur, &del,
|
|
&tmp_logflags, delta, whichfork, rsvd);
|
|
logflags |= tmp_logflags;
|
|
if (error)
|
|
goto error0;
|
|
bno = del.br_startoff - 1;
|
|
nodelete:
|
|
lastx = ifp->if_lastex;
|
|
/*
|
|
* If not done go on to the next (previous) record.
|
|
* Reset ep in case the extents array was re-alloced.
|
|
*/
|
|
ep = xfs_iext_get_ext(ifp, lastx);
|
|
if (bno != (xfs_fileoff_t)-1 && bno >= start) {
|
|
if (lastx >= XFS_IFORK_NEXTENTS(ip, whichfork) ||
|
|
xfs_bmbt_get_startoff(ep) > bno) {
|
|
if (--lastx >= 0)
|
|
ep = xfs_iext_get_ext(ifp, lastx);
|
|
}
|
|
if (lastx >= 0)
|
|
xfs_bmbt_get_all(ep, &got);
|
|
extno++;
|
|
}
|
|
}
|
|
ifp->if_lastex = lastx;
|
|
*done = bno == (xfs_fileoff_t)-1 || bno < start || lastx < 0;
|
|
ASSERT(ifp->if_ext_max ==
|
|
XFS_IFORK_SIZE(ip, whichfork) / (uint)sizeof(xfs_bmbt_rec_t));
|
|
/*
|
|
* Convert to a btree if necessary.
|
|
*/
|
|
if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS &&
|
|
XFS_IFORK_NEXTENTS(ip, whichfork) > ifp->if_ext_max) {
|
|
ASSERT(cur == NULL);
|
|
error = xfs_bmap_extents_to_btree(tp, ip, firstblock, flist,
|
|
&cur, 0, &tmp_logflags, whichfork);
|
|
logflags |= tmp_logflags;
|
|
if (error)
|
|
goto error0;
|
|
}
|
|
/*
|
|
* transform from btree to extents, give it cur
|
|
*/
|
|
else if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE &&
|
|
XFS_IFORK_NEXTENTS(ip, whichfork) <= ifp->if_ext_max) {
|
|
ASSERT(cur != NULL);
|
|
error = xfs_bmap_btree_to_extents(tp, ip, cur, &tmp_logflags,
|
|
whichfork);
|
|
logflags |= tmp_logflags;
|
|
if (error)
|
|
goto error0;
|
|
}
|
|
/*
|
|
* transform from extents to local?
|
|
*/
|
|
ASSERT(ifp->if_ext_max ==
|
|
XFS_IFORK_SIZE(ip, whichfork) / (uint)sizeof(xfs_bmbt_rec_t));
|
|
error = 0;
|
|
if (delta && delta->xed_startoff != NULLFILEOFF) {
|
|
/* A change was actually made.
|
|
* Note that delta->xed_blockount is an offset at this
|
|
* point and needs to be converted to a block count.
|
|
*/
|
|
ASSERT(delta->xed_blockcount > delta->xed_startoff);
|
|
delta->xed_blockcount -= delta->xed_startoff;
|
|
}
|
|
error0:
|
|
/*
|
|
* Log everything. Do this after conversion, there's no point in
|
|
* logging the extent records if we've converted to btree format.
|
|
*/
|
|
if ((logflags & XFS_ILOG_FEXT(whichfork)) &&
|
|
XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS)
|
|
logflags &= ~XFS_ILOG_FEXT(whichfork);
|
|
else if ((logflags & XFS_ILOG_FBROOT(whichfork)) &&
|
|
XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE)
|
|
logflags &= ~XFS_ILOG_FBROOT(whichfork);
|
|
/*
|
|
* Log inode even in the error case, if the transaction
|
|
* is dirty we'll need to shut down the filesystem.
|
|
*/
|
|
if (logflags)
|
|
xfs_trans_log_inode(tp, ip, logflags);
|
|
if (cur) {
|
|
if (!error) {
|
|
*firstblock = cur->bc_private.b.firstblock;
|
|
cur->bc_private.b.allocated = 0;
|
|
}
|
|
xfs_btree_del_cursor(cur,
|
|
error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR);
|
|
}
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Fcntl interface to xfs_bmapi.
|
|
*/
|
|
int /* error code */
|
|
xfs_getbmap(
|
|
bhv_desc_t *bdp, /* XFS behavior descriptor*/
|
|
struct getbmap *bmv, /* user bmap structure */
|
|
void __user *ap, /* pointer to user's array */
|
|
int interface) /* interface flags */
|
|
{
|
|
__int64_t bmvend; /* last block requested */
|
|
int error; /* return value */
|
|
__int64_t fixlen; /* length for -1 case */
|
|
int i; /* extent number */
|
|
xfs_inode_t *ip; /* xfs incore inode pointer */
|
|
bhv_vnode_t *vp; /* corresponding vnode */
|
|
int lock; /* lock state */
|
|
xfs_bmbt_irec_t *map; /* buffer for user's data */
|
|
xfs_mount_t *mp; /* file system mount point */
|
|
int nex; /* # of user extents can do */
|
|
int nexleft; /* # of user extents left */
|
|
int subnex; /* # of bmapi's can do */
|
|
int nmap; /* number of map entries */
|
|
struct getbmap out; /* output structure */
|
|
int whichfork; /* data or attr fork */
|
|
int prealloced; /* this is a file with
|
|
* preallocated data space */
|
|
int sh_unwritten; /* true, if unwritten */
|
|
/* extents listed separately */
|
|
int bmapi_flags; /* flags for xfs_bmapi */
|
|
__int32_t oflags; /* getbmapx bmv_oflags field */
|
|
|
|
vp = BHV_TO_VNODE(bdp);
|
|
ip = XFS_BHVTOI(bdp);
|
|
mp = ip->i_mount;
|
|
|
|
whichfork = interface & BMV_IF_ATTRFORK ? XFS_ATTR_FORK : XFS_DATA_FORK;
|
|
sh_unwritten = (interface & BMV_IF_PREALLOC) != 0;
|
|
|
|
/* If the BMV_IF_NO_DMAPI_READ interface bit specified, do not
|
|
* generate a DMAPI read event. Otherwise, if the DM_EVENT_READ
|
|
* bit is set for the file, generate a read event in order
|
|
* that the DMAPI application may do its thing before we return
|
|
* the extents. Usually this means restoring user file data to
|
|
* regions of the file that look like holes.
|
|
*
|
|
* The "old behavior" (from XFS_IOC_GETBMAP) is to not specify
|
|
* BMV_IF_NO_DMAPI_READ so that read events are generated.
|
|
* If this were not true, callers of ioctl( XFS_IOC_GETBMAP )
|
|
* could misinterpret holes in a DMAPI file as true holes,
|
|
* when in fact they may represent offline user data.
|
|
*/
|
|
if ( (interface & BMV_IF_NO_DMAPI_READ) == 0
|
|
&& DM_EVENT_ENABLED(vp->v_vfsp, ip, DM_EVENT_READ)
|
|
&& whichfork == XFS_DATA_FORK) {
|
|
|
|
error = XFS_SEND_DATA(mp, DM_EVENT_READ, vp, 0, 0, 0, NULL);
|
|
if (error)
|
|
return XFS_ERROR(error);
|
|
}
|
|
|
|
if (whichfork == XFS_ATTR_FORK) {
|
|
if (XFS_IFORK_Q(ip)) {
|
|
if (ip->i_d.di_aformat != XFS_DINODE_FMT_EXTENTS &&
|
|
ip->i_d.di_aformat != XFS_DINODE_FMT_BTREE &&
|
|
ip->i_d.di_aformat != XFS_DINODE_FMT_LOCAL)
|
|
return XFS_ERROR(EINVAL);
|
|
} else if (unlikely(
|
|
ip->i_d.di_aformat != 0 &&
|
|
ip->i_d.di_aformat != XFS_DINODE_FMT_EXTENTS)) {
|
|
XFS_ERROR_REPORT("xfs_getbmap", XFS_ERRLEVEL_LOW,
|
|
ip->i_mount);
|
|
return XFS_ERROR(EFSCORRUPTED);
|
|
}
|
|
} else if (ip->i_d.di_format != XFS_DINODE_FMT_EXTENTS &&
|
|
ip->i_d.di_format != XFS_DINODE_FMT_BTREE &&
|
|
ip->i_d.di_format != XFS_DINODE_FMT_LOCAL)
|
|
return XFS_ERROR(EINVAL);
|
|
if (whichfork == XFS_DATA_FORK) {
|
|
if ((ip->i_d.di_extsize && (ip->i_d.di_flags &
|
|
(XFS_DIFLAG_REALTIME|XFS_DIFLAG_EXTSIZE))) ||
|
|
ip->i_d.di_flags & (XFS_DIFLAG_PREALLOC|XFS_DIFLAG_APPEND)){
|
|
prealloced = 1;
|
|
fixlen = XFS_MAXIOFFSET(mp);
|
|
} else {
|
|
prealloced = 0;
|
|
fixlen = ip->i_d.di_size;
|
|
}
|
|
} else {
|
|
prealloced = 0;
|
|
fixlen = 1LL << 32;
|
|
}
|
|
|
|
if (bmv->bmv_length == -1) {
|
|
fixlen = XFS_FSB_TO_BB(mp, XFS_B_TO_FSB(mp, fixlen));
|
|
bmv->bmv_length = MAX( (__int64_t)(fixlen - bmv->bmv_offset),
|
|
(__int64_t)0);
|
|
} else if (bmv->bmv_length < 0)
|
|
return XFS_ERROR(EINVAL);
|
|
if (bmv->bmv_length == 0) {
|
|
bmv->bmv_entries = 0;
|
|
return 0;
|
|
}
|
|
nex = bmv->bmv_count - 1;
|
|
if (nex <= 0)
|
|
return XFS_ERROR(EINVAL);
|
|
bmvend = bmv->bmv_offset + bmv->bmv_length;
|
|
|
|
xfs_ilock(ip, XFS_IOLOCK_SHARED);
|
|
|
|
if (whichfork == XFS_DATA_FORK && ip->i_delayed_blks) {
|
|
/* xfs_fsize_t last_byte = xfs_file_last_byte(ip); */
|
|
error = bhv_vop_flush_pages(vp, (xfs_off_t)0, -1, 0, FI_REMAPF);
|
|
}
|
|
|
|
ASSERT(whichfork == XFS_ATTR_FORK || ip->i_delayed_blks == 0);
|
|
|
|
lock = xfs_ilock_map_shared(ip);
|
|
|
|
/*
|
|
* Don't let nex be bigger than the number of extents
|
|
* we can have assuming alternating holes and real extents.
|
|
*/
|
|
if (nex > XFS_IFORK_NEXTENTS(ip, whichfork) * 2 + 1)
|
|
nex = XFS_IFORK_NEXTENTS(ip, whichfork) * 2 + 1;
|
|
|
|
bmapi_flags = XFS_BMAPI_AFLAG(whichfork) |
|
|
((sh_unwritten) ? 0 : XFS_BMAPI_IGSTATE);
|
|
|
|
/*
|
|
* Allocate enough space to handle "subnex" maps at a time.
|
|
*/
|
|
subnex = 16;
|
|
map = kmem_alloc(subnex * sizeof(*map), KM_SLEEP);
|
|
|
|
bmv->bmv_entries = 0;
|
|
|
|
if (XFS_IFORK_NEXTENTS(ip, whichfork) == 0) {
|
|
error = 0;
|
|
goto unlock_and_return;
|
|
}
|
|
|
|
nexleft = nex;
|
|
|
|
do {
|
|
nmap = (nexleft > subnex) ? subnex : nexleft;
|
|
error = xfs_bmapi(NULL, ip, XFS_BB_TO_FSBT(mp, bmv->bmv_offset),
|
|
XFS_BB_TO_FSB(mp, bmv->bmv_length),
|
|
bmapi_flags, NULL, 0, map, &nmap,
|
|
NULL, NULL);
|
|
if (error)
|
|
goto unlock_and_return;
|
|
ASSERT(nmap <= subnex);
|
|
|
|
for (i = 0; i < nmap && nexleft && bmv->bmv_length; i++) {
|
|
nexleft--;
|
|
oflags = (map[i].br_state == XFS_EXT_UNWRITTEN) ?
|
|
BMV_OF_PREALLOC : 0;
|
|
out.bmv_offset = XFS_FSB_TO_BB(mp, map[i].br_startoff);
|
|
out.bmv_length = XFS_FSB_TO_BB(mp, map[i].br_blockcount);
|
|
ASSERT(map[i].br_startblock != DELAYSTARTBLOCK);
|
|
if (map[i].br_startblock == HOLESTARTBLOCK &&
|
|
((prealloced && out.bmv_offset + out.bmv_length == bmvend) ||
|
|
whichfork == XFS_ATTR_FORK )) {
|
|
/*
|
|
* came to hole at end of file or the end of
|
|
attribute fork
|
|
*/
|
|
goto unlock_and_return;
|
|
} else {
|
|
out.bmv_block =
|
|
(map[i].br_startblock == HOLESTARTBLOCK) ?
|
|
-1 :
|
|
XFS_FSB_TO_DB(ip, map[i].br_startblock);
|
|
|
|
/* return either getbmap/getbmapx structure. */
|
|
if (interface & BMV_IF_EXTENDED) {
|
|
struct getbmapx outx;
|
|
|
|
GETBMAP_CONVERT(out,outx);
|
|
outx.bmv_oflags = oflags;
|
|
outx.bmv_unused1 = outx.bmv_unused2 = 0;
|
|
if (copy_to_user(ap, &outx,
|
|
sizeof(outx))) {
|
|
error = XFS_ERROR(EFAULT);
|
|
goto unlock_and_return;
|
|
}
|
|
} else {
|
|
if (copy_to_user(ap, &out,
|
|
sizeof(out))) {
|
|
error = XFS_ERROR(EFAULT);
|
|
goto unlock_and_return;
|
|
}
|
|
}
|
|
bmv->bmv_offset =
|
|
out.bmv_offset + out.bmv_length;
|
|
bmv->bmv_length = MAX((__int64_t)0,
|
|
(__int64_t)(bmvend - bmv->bmv_offset));
|
|
bmv->bmv_entries++;
|
|
ap = (interface & BMV_IF_EXTENDED) ?
|
|
(void __user *)
|
|
((struct getbmapx __user *)ap + 1) :
|
|
(void __user *)
|
|
((struct getbmap __user *)ap + 1);
|
|
}
|
|
}
|
|
} while (nmap && nexleft && bmv->bmv_length);
|
|
|
|
unlock_and_return:
|
|
xfs_iunlock_map_shared(ip, lock);
|
|
xfs_iunlock(ip, XFS_IOLOCK_SHARED);
|
|
|
|
kmem_free(map, subnex * sizeof(*map));
|
|
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Check the last inode extent to determine whether this allocation will result
|
|
* in blocks being allocated at the end of the file. When we allocate new data
|
|
* blocks at the end of the file which do not start at the previous data block,
|
|
* we will try to align the new blocks at stripe unit boundaries.
|
|
*/
|
|
STATIC int /* error */
|
|
xfs_bmap_isaeof(
|
|
xfs_inode_t *ip, /* incore inode pointer */
|
|
xfs_fileoff_t off, /* file offset in fsblocks */
|
|
int whichfork, /* data or attribute fork */
|
|
char *aeof) /* return value */
|
|
{
|
|
int error; /* error return value */
|
|
xfs_ifork_t *ifp; /* inode fork pointer */
|
|
xfs_bmbt_rec_t *lastrec; /* extent record pointer */
|
|
xfs_extnum_t nextents; /* number of file extents */
|
|
xfs_bmbt_irec_t s; /* expanded extent record */
|
|
|
|
ASSERT(whichfork == XFS_DATA_FORK);
|
|
ifp = XFS_IFORK_PTR(ip, whichfork);
|
|
if (!(ifp->if_flags & XFS_IFEXTENTS) &&
|
|
(error = xfs_iread_extents(NULL, ip, whichfork)))
|
|
return error;
|
|
nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
|
|
if (nextents == 0) {
|
|
*aeof = 1;
|
|
return 0;
|
|
}
|
|
/*
|
|
* Go to the last extent
|
|
*/
|
|
lastrec = xfs_iext_get_ext(ifp, nextents - 1);
|
|
xfs_bmbt_get_all(lastrec, &s);
|
|
/*
|
|
* Check we are allocating in the last extent (for delayed allocations)
|
|
* or past the last extent for non-delayed allocations.
|
|
*/
|
|
*aeof = (off >= s.br_startoff &&
|
|
off < s.br_startoff + s.br_blockcount &&
|
|
ISNULLSTARTBLOCK(s.br_startblock)) ||
|
|
off >= s.br_startoff + s.br_blockcount;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Check if the endoff is outside the last extent. If so the caller will grow
|
|
* the allocation to a stripe unit boundary.
|
|
*/
|
|
int /* error */
|
|
xfs_bmap_eof(
|
|
xfs_inode_t *ip, /* incore inode pointer */
|
|
xfs_fileoff_t endoff, /* file offset in fsblocks */
|
|
int whichfork, /* data or attribute fork */
|
|
int *eof) /* result value */
|
|
{
|
|
xfs_fsblock_t blockcount; /* extent block count */
|
|
int error; /* error return value */
|
|
xfs_ifork_t *ifp; /* inode fork pointer */
|
|
xfs_bmbt_rec_t *lastrec; /* extent record pointer */
|
|
xfs_extnum_t nextents; /* number of file extents */
|
|
xfs_fileoff_t startoff; /* extent starting file offset */
|
|
|
|
ASSERT(whichfork == XFS_DATA_FORK);
|
|
ifp = XFS_IFORK_PTR(ip, whichfork);
|
|
if (!(ifp->if_flags & XFS_IFEXTENTS) &&
|
|
(error = xfs_iread_extents(NULL, ip, whichfork)))
|
|
return error;
|
|
nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
|
|
if (nextents == 0) {
|
|
*eof = 1;
|
|
return 0;
|
|
}
|
|
/*
|
|
* Go to the last extent
|
|
*/
|
|
lastrec = xfs_iext_get_ext(ifp, nextents - 1);
|
|
startoff = xfs_bmbt_get_startoff(lastrec);
|
|
blockcount = xfs_bmbt_get_blockcount(lastrec);
|
|
*eof = endoff >= startoff + blockcount;
|
|
return 0;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
/*
|
|
* Check that the extents list for the inode ip is in the right order.
|
|
*/
|
|
STATIC void
|
|
xfs_bmap_check_extents(
|
|
xfs_inode_t *ip, /* incore inode pointer */
|
|
int whichfork) /* data or attr fork */
|
|
{
|
|
xfs_bmbt_rec_t *ep; /* current extent entry */
|
|
xfs_extnum_t idx; /* extent record index */
|
|
xfs_ifork_t *ifp; /* inode fork pointer */
|
|
xfs_extnum_t nextents; /* number of extents in list */
|
|
xfs_bmbt_rec_t *nextp; /* next extent entry */
|
|
|
|
ifp = XFS_IFORK_PTR(ip, whichfork);
|
|
ASSERT(ifp->if_flags & XFS_IFEXTENTS);
|
|
nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
|
|
ep = xfs_iext_get_ext(ifp, 0);
|
|
for (idx = 0; idx < nextents - 1; idx++) {
|
|
nextp = xfs_iext_get_ext(ifp, idx + 1);
|
|
xfs_btree_check_rec(XFS_BTNUM_BMAP, (void *)ep,
|
|
(void *)(nextp));
|
|
ep = nextp;
|
|
}
|
|
}
|
|
|
|
STATIC
|
|
xfs_buf_t *
|
|
xfs_bmap_get_bp(
|
|
xfs_btree_cur_t *cur,
|
|
xfs_fsblock_t bno)
|
|
{
|
|
int i;
|
|
xfs_buf_t *bp;
|
|
|
|
if (!cur)
|
|
return(NULL);
|
|
|
|
bp = NULL;
|
|
for(i = 0; i < XFS_BTREE_MAXLEVELS; i++) {
|
|
bp = cur->bc_bufs[i];
|
|
if (!bp) break;
|
|
if (XFS_BUF_ADDR(bp) == bno)
|
|
break; /* Found it */
|
|
}
|
|
if (i == XFS_BTREE_MAXLEVELS)
|
|
bp = NULL;
|
|
|
|
if (!bp) { /* Chase down all the log items to see if the bp is there */
|
|
xfs_log_item_chunk_t *licp;
|
|
xfs_trans_t *tp;
|
|
|
|
tp = cur->bc_tp;
|
|
licp = &tp->t_items;
|
|
while (!bp && licp != NULL) {
|
|
if (XFS_LIC_ARE_ALL_FREE(licp)) {
|
|
licp = licp->lic_next;
|
|
continue;
|
|
}
|
|
for (i = 0; i < licp->lic_unused; i++) {
|
|
xfs_log_item_desc_t *lidp;
|
|
xfs_log_item_t *lip;
|
|
xfs_buf_log_item_t *bip;
|
|
xfs_buf_t *lbp;
|
|
|
|
if (XFS_LIC_ISFREE(licp, i)) {
|
|
continue;
|
|
}
|
|
|
|
lidp = XFS_LIC_SLOT(licp, i);
|
|
lip = lidp->lid_item;
|
|
if (lip->li_type != XFS_LI_BUF)
|
|
continue;
|
|
|
|
bip = (xfs_buf_log_item_t *)lip;
|
|
lbp = bip->bli_buf;
|
|
|
|
if (XFS_BUF_ADDR(lbp) == bno) {
|
|
bp = lbp;
|
|
break; /* Found it */
|
|
}
|
|
}
|
|
licp = licp->lic_next;
|
|
}
|
|
}
|
|
return(bp);
|
|
}
|
|
|
|
void
|
|
xfs_check_block(
|
|
xfs_bmbt_block_t *block,
|
|
xfs_mount_t *mp,
|
|
int root,
|
|
short sz)
|
|
{
|
|
int i, j, dmxr;
|
|
xfs_bmbt_ptr_t *pp, *thispa; /* pointer to block address */
|
|
xfs_bmbt_key_t *prevp, *keyp;
|
|
|
|
ASSERT(be16_to_cpu(block->bb_level) > 0);
|
|
|
|
prevp = NULL;
|
|
for( i = 1; i <= be16_to_cpu(block->bb_numrecs); i++) {
|
|
dmxr = mp->m_bmap_dmxr[0];
|
|
|
|
if (root) {
|
|
keyp = XFS_BMAP_BROOT_KEY_ADDR(block, i, sz);
|
|
} else {
|
|
keyp = XFS_BTREE_KEY_ADDR(mp->m_sb.sb_blocksize,
|
|
xfs_bmbt, block, i, dmxr);
|
|
}
|
|
|
|
if (prevp) {
|
|
xfs_btree_check_key(XFS_BTNUM_BMAP, prevp, keyp);
|
|
}
|
|
prevp = keyp;
|
|
|
|
/*
|
|
* Compare the block numbers to see if there are dups.
|
|
*/
|
|
|
|
if (root) {
|
|
pp = XFS_BMAP_BROOT_PTR_ADDR(block, i, sz);
|
|
} else {
|
|
pp = XFS_BTREE_PTR_ADDR(mp->m_sb.sb_blocksize,
|
|
xfs_bmbt, block, i, dmxr);
|
|
}
|
|
for (j = i+1; j <= be16_to_cpu(block->bb_numrecs); j++) {
|
|
if (root) {
|
|
thispa = XFS_BMAP_BROOT_PTR_ADDR(block, j, sz);
|
|
} else {
|
|
thispa = XFS_BTREE_PTR_ADDR(mp->m_sb.sb_blocksize,
|
|
xfs_bmbt, block, j, dmxr);
|
|
}
|
|
if (INT_GET(*thispa, ARCH_CONVERT) ==
|
|
INT_GET(*pp, ARCH_CONVERT)) {
|
|
cmn_err(CE_WARN, "%s: thispa(%d) == pp(%d) %Ld",
|
|
__FUNCTION__, j, i,
|
|
INT_GET(*thispa, ARCH_CONVERT));
|
|
panic("%s: ptrs are equal in node\n",
|
|
__FUNCTION__);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Check that the extents for the inode ip are in the right order in all
|
|
* btree leaves.
|
|
*/
|
|
|
|
STATIC void
|
|
xfs_bmap_check_leaf_extents(
|
|
xfs_btree_cur_t *cur, /* btree cursor or null */
|
|
xfs_inode_t *ip, /* incore inode pointer */
|
|
int whichfork) /* data or attr fork */
|
|
{
|
|
xfs_bmbt_block_t *block; /* current btree block */
|
|
xfs_fsblock_t bno; /* block # of "block" */
|
|
xfs_buf_t *bp; /* buffer for "block" */
|
|
int error; /* error return value */
|
|
xfs_extnum_t i=0, j; /* index into the extents list */
|
|
xfs_ifork_t *ifp; /* fork structure */
|
|
int level; /* btree level, for checking */
|
|
xfs_mount_t *mp; /* file system mount structure */
|
|
xfs_bmbt_ptr_t *pp; /* pointer to block address */
|
|
xfs_bmbt_rec_t *ep; /* pointer to current extent */
|
|
xfs_bmbt_rec_t *lastp; /* pointer to previous extent */
|
|
xfs_bmbt_rec_t *nextp; /* pointer to next extent */
|
|
int bp_release = 0;
|
|
|
|
if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE) {
|
|
return;
|
|
}
|
|
|
|
bno = NULLFSBLOCK;
|
|
mp = ip->i_mount;
|
|
ifp = XFS_IFORK_PTR(ip, whichfork);
|
|
block = ifp->if_broot;
|
|
/*
|
|
* Root level must use BMAP_BROOT_PTR_ADDR macro to get ptr out.
|
|
*/
|
|
level = be16_to_cpu(block->bb_level);
|
|
ASSERT(level > 0);
|
|
xfs_check_block(block, mp, 1, ifp->if_broot_bytes);
|
|
pp = XFS_BMAP_BROOT_PTR_ADDR(block, 1, ifp->if_broot_bytes);
|
|
ASSERT(INT_GET(*pp, ARCH_CONVERT) != NULLDFSBNO);
|
|
ASSERT(XFS_FSB_TO_AGNO(mp, INT_GET(*pp, ARCH_CONVERT)) < mp->m_sb.sb_agcount);
|
|
ASSERT(XFS_FSB_TO_AGBNO(mp, INT_GET(*pp, ARCH_CONVERT)) < mp->m_sb.sb_agblocks);
|
|
bno = INT_GET(*pp, ARCH_CONVERT);
|
|
/*
|
|
* Go down the tree until leaf level is reached, following the first
|
|
* pointer (leftmost) at each level.
|
|
*/
|
|
while (level-- > 0) {
|
|
/* See if buf is in cur first */
|
|
bp = xfs_bmap_get_bp(cur, XFS_FSB_TO_DADDR(mp, bno));
|
|
if (bp) {
|
|
bp_release = 0;
|
|
} else {
|
|
bp_release = 1;
|
|
}
|
|
if (!bp && (error = xfs_btree_read_bufl(mp, NULL, bno, 0, &bp,
|
|
XFS_BMAP_BTREE_REF)))
|
|
goto error_norelse;
|
|
block = XFS_BUF_TO_BMBT_BLOCK(bp);
|
|
XFS_WANT_CORRUPTED_GOTO(
|
|
XFS_BMAP_SANITY_CHECK(mp, block, level),
|
|
error0);
|
|
if (level == 0)
|
|
break;
|
|
|
|
/*
|
|
* Check this block for basic sanity (increasing keys and
|
|
* no duplicate blocks).
|
|
*/
|
|
|
|
xfs_check_block(block, mp, 0, 0);
|
|
pp = XFS_BTREE_PTR_ADDR(mp->m_sb.sb_blocksize, xfs_bmbt, block,
|
|
1, mp->m_bmap_dmxr[1]);
|
|
XFS_WANT_CORRUPTED_GOTO(XFS_FSB_SANITY_CHECK(mp, INT_GET(*pp, ARCH_CONVERT)), error0);
|
|
bno = INT_GET(*pp, ARCH_CONVERT);
|
|
if (bp_release) {
|
|
bp_release = 0;
|
|
xfs_trans_brelse(NULL, bp);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Here with bp and block set to the leftmost leaf node in the tree.
|
|
*/
|
|
i = 0;
|
|
|
|
/*
|
|
* Loop over all leaf nodes checking that all extents are in the right order.
|
|
*/
|
|
lastp = NULL;
|
|
for (;;) {
|
|
xfs_fsblock_t nextbno;
|
|
xfs_extnum_t num_recs;
|
|
|
|
|
|
num_recs = be16_to_cpu(block->bb_numrecs);
|
|
|
|
/*
|
|
* Read-ahead the next leaf block, if any.
|
|
*/
|
|
|
|
nextbno = be64_to_cpu(block->bb_rightsib);
|
|
|
|
/*
|
|
* Check all the extents to make sure they are OK.
|
|
* If we had a previous block, the last entry should
|
|
* conform with the first entry in this one.
|
|
*/
|
|
|
|
ep = XFS_BTREE_REC_ADDR(mp->m_sb.sb_blocksize, xfs_bmbt,
|
|
block, 1, mp->m_bmap_dmxr[0]);
|
|
for (j = 1; j < num_recs; j++) {
|
|
nextp = XFS_BTREE_REC_ADDR(mp->m_sb.sb_blocksize, xfs_bmbt,
|
|
block, j + 1, mp->m_bmap_dmxr[0]);
|
|
if (lastp) {
|
|
xfs_btree_check_rec(XFS_BTNUM_BMAP,
|
|
(void *)lastp, (void *)ep);
|
|
}
|
|
xfs_btree_check_rec(XFS_BTNUM_BMAP, (void *)ep,
|
|
(void *)(nextp));
|
|
lastp = ep;
|
|
ep = nextp;
|
|
}
|
|
|
|
i += num_recs;
|
|
if (bp_release) {
|
|
bp_release = 0;
|
|
xfs_trans_brelse(NULL, bp);
|
|
}
|
|
bno = nextbno;
|
|
/*
|
|
* If we've reached the end, stop.
|
|
*/
|
|
if (bno == NULLFSBLOCK)
|
|
break;
|
|
|
|
bp = xfs_bmap_get_bp(cur, XFS_FSB_TO_DADDR(mp, bno));
|
|
if (bp) {
|
|
bp_release = 0;
|
|
} else {
|
|
bp_release = 1;
|
|
}
|
|
if (!bp && (error = xfs_btree_read_bufl(mp, NULL, bno, 0, &bp,
|
|
XFS_BMAP_BTREE_REF)))
|
|
goto error_norelse;
|
|
block = XFS_BUF_TO_BMBT_BLOCK(bp);
|
|
}
|
|
if (bp_release) {
|
|
bp_release = 0;
|
|
xfs_trans_brelse(NULL, bp);
|
|
}
|
|
return;
|
|
|
|
error0:
|
|
cmn_err(CE_WARN, "%s: at error0", __FUNCTION__);
|
|
if (bp_release)
|
|
xfs_trans_brelse(NULL, bp);
|
|
error_norelse:
|
|
cmn_err(CE_WARN, "%s: BAD after btree leaves for %d extents",
|
|
__FUNCTION__, i);
|
|
panic("%s: CORRUPTED BTREE OR SOMETHING", __FUNCTION__);
|
|
return;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Count fsblocks of the given fork.
|
|
*/
|
|
int /* error */
|
|
xfs_bmap_count_blocks(
|
|
xfs_trans_t *tp, /* transaction pointer */
|
|
xfs_inode_t *ip, /* incore inode */
|
|
int whichfork, /* data or attr fork */
|
|
int *count) /* out: count of blocks */
|
|
{
|
|
xfs_bmbt_block_t *block; /* current btree block */
|
|
xfs_fsblock_t bno; /* block # of "block" */
|
|
xfs_ifork_t *ifp; /* fork structure */
|
|
int level; /* btree level, for checking */
|
|
xfs_mount_t *mp; /* file system mount structure */
|
|
xfs_bmbt_ptr_t *pp; /* pointer to block address */
|
|
|
|
bno = NULLFSBLOCK;
|
|
mp = ip->i_mount;
|
|
ifp = XFS_IFORK_PTR(ip, whichfork);
|
|
if ( XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS ) {
|
|
if (unlikely(xfs_bmap_count_leaves(ifp, 0,
|
|
ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t),
|
|
count) < 0)) {
|
|
XFS_ERROR_REPORT("xfs_bmap_count_blocks(1)",
|
|
XFS_ERRLEVEL_LOW, mp);
|
|
return XFS_ERROR(EFSCORRUPTED);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Root level must use BMAP_BROOT_PTR_ADDR macro to get ptr out.
|
|
*/
|
|
block = ifp->if_broot;
|
|
level = be16_to_cpu(block->bb_level);
|
|
ASSERT(level > 0);
|
|
pp = XFS_BMAP_BROOT_PTR_ADDR(block, 1, ifp->if_broot_bytes);
|
|
ASSERT(INT_GET(*pp, ARCH_CONVERT) != NULLDFSBNO);
|
|
ASSERT(XFS_FSB_TO_AGNO(mp, INT_GET(*pp, ARCH_CONVERT)) < mp->m_sb.sb_agcount);
|
|
ASSERT(XFS_FSB_TO_AGBNO(mp, INT_GET(*pp, ARCH_CONVERT)) < mp->m_sb.sb_agblocks);
|
|
bno = INT_GET(*pp, ARCH_CONVERT);
|
|
|
|
if (unlikely(xfs_bmap_count_tree(mp, tp, ifp, bno, level, count) < 0)) {
|
|
XFS_ERROR_REPORT("xfs_bmap_count_blocks(2)", XFS_ERRLEVEL_LOW,
|
|
mp);
|
|
return XFS_ERROR(EFSCORRUPTED);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Recursively walks each level of a btree
|
|
* to count total fsblocks is use.
|
|
*/
|
|
int /* error */
|
|
xfs_bmap_count_tree(
|
|
xfs_mount_t *mp, /* file system mount point */
|
|
xfs_trans_t *tp, /* transaction pointer */
|
|
xfs_ifork_t *ifp, /* inode fork pointer */
|
|
xfs_fsblock_t blockno, /* file system block number */
|
|
int levelin, /* level in btree */
|
|
int *count) /* Count of blocks */
|
|
{
|
|
int error;
|
|
xfs_buf_t *bp, *nbp;
|
|
int level = levelin;
|
|
xfs_bmbt_ptr_t *pp;
|
|
xfs_fsblock_t bno = blockno;
|
|
xfs_fsblock_t nextbno;
|
|
xfs_bmbt_block_t *block, *nextblock;
|
|
int numrecs;
|
|
|
|
if ((error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp, XFS_BMAP_BTREE_REF)))
|
|
return error;
|
|
*count += 1;
|
|
block = XFS_BUF_TO_BMBT_BLOCK(bp);
|
|
|
|
if (--level) {
|
|
/* Not at node above leafs, count this level of nodes */
|
|
nextbno = be64_to_cpu(block->bb_rightsib);
|
|
while (nextbno != NULLFSBLOCK) {
|
|
if ((error = xfs_btree_read_bufl(mp, tp, nextbno,
|
|
0, &nbp, XFS_BMAP_BTREE_REF)))
|
|
return error;
|
|
*count += 1;
|
|
nextblock = XFS_BUF_TO_BMBT_BLOCK(nbp);
|
|
nextbno = be64_to_cpu(nextblock->bb_rightsib);
|
|
xfs_trans_brelse(tp, nbp);
|
|
}
|
|
|
|
/* Dive to the next level */
|
|
pp = XFS_BTREE_PTR_ADDR(mp->m_sb.sb_blocksize,
|
|
xfs_bmbt, block, 1, mp->m_bmap_dmxr[1]);
|
|
bno = INT_GET(*pp, ARCH_CONVERT);
|
|
if (unlikely((error =
|
|
xfs_bmap_count_tree(mp, tp, ifp, bno, level, count)) < 0)) {
|
|
xfs_trans_brelse(tp, bp);
|
|
XFS_ERROR_REPORT("xfs_bmap_count_tree(1)",
|
|
XFS_ERRLEVEL_LOW, mp);
|
|
return XFS_ERROR(EFSCORRUPTED);
|
|
}
|
|
xfs_trans_brelse(tp, bp);
|
|
} else {
|
|
/* count all level 1 nodes and their leaves */
|
|
for (;;) {
|
|
nextbno = be64_to_cpu(block->bb_rightsib);
|
|
numrecs = be16_to_cpu(block->bb_numrecs);
|
|
if (unlikely(xfs_bmap_disk_count_leaves(ifp, mp,
|
|
0, block, numrecs, count) < 0)) {
|
|
xfs_trans_brelse(tp, bp);
|
|
XFS_ERROR_REPORT("xfs_bmap_count_tree(2)",
|
|
XFS_ERRLEVEL_LOW, mp);
|
|
return XFS_ERROR(EFSCORRUPTED);
|
|
}
|
|
xfs_trans_brelse(tp, bp);
|
|
if (nextbno == NULLFSBLOCK)
|
|
break;
|
|
bno = nextbno;
|
|
if ((error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp,
|
|
XFS_BMAP_BTREE_REF)))
|
|
return error;
|
|
*count += 1;
|
|
block = XFS_BUF_TO_BMBT_BLOCK(bp);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Count leaf blocks given a range of extent records.
|
|
*/
|
|
int
|
|
xfs_bmap_count_leaves(
|
|
xfs_ifork_t *ifp,
|
|
xfs_extnum_t idx,
|
|
int numrecs,
|
|
int *count)
|
|
{
|
|
int b;
|
|
xfs_bmbt_rec_t *frp;
|
|
|
|
for (b = 0; b < numrecs; b++) {
|
|
frp = xfs_iext_get_ext(ifp, idx + b);
|
|
*count += xfs_bmbt_get_blockcount(frp);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Count leaf blocks given a range of extent records originally
|
|
* in btree format.
|
|
*/
|
|
int
|
|
xfs_bmap_disk_count_leaves(
|
|
xfs_ifork_t *ifp,
|
|
xfs_mount_t *mp,
|
|
xfs_extnum_t idx,
|
|
xfs_bmbt_block_t *block,
|
|
int numrecs,
|
|
int *count)
|
|
{
|
|
int b;
|
|
xfs_bmbt_rec_t *frp;
|
|
|
|
for (b = 1; b <= numrecs; b++) {
|
|
frp = XFS_BTREE_REC_ADDR(mp->m_sb.sb_blocksize,
|
|
xfs_bmbt, block, idx + b, mp->m_bmap_dmxr[0]);
|
|
*count += xfs_bmbt_disk_get_blockcount(frp);
|
|
}
|
|
return 0;
|
|
}
|