1453 lines
38 KiB
C
1453 lines
38 KiB
C
/*
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* Copyright (c) 2000-2003,2005 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_dmapi.h"
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#include "xfs_mount.h"
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#include "xfs_error.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_ialloc.h"
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#include "xfs_alloc.h"
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#include "xfs_bmap.h"
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#include "xfs_quota.h"
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#include "xfs_trans_priv.h"
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#include "xfs_trans_space.h"
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#include "xfs_inode_item.h"
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STATIC void xfs_trans_apply_sb_deltas(xfs_trans_t *);
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STATIC uint xfs_trans_count_vecs(xfs_trans_t *);
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STATIC void xfs_trans_fill_vecs(xfs_trans_t *, xfs_log_iovec_t *);
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STATIC void xfs_trans_uncommit(xfs_trans_t *, uint);
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STATIC void xfs_trans_committed(xfs_trans_t *, int);
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STATIC void xfs_trans_chunk_committed(xfs_log_item_chunk_t *, xfs_lsn_t, int);
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STATIC void xfs_trans_free(xfs_trans_t *);
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kmem_zone_t *xfs_trans_zone;
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/*
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* Reservation functions here avoid a huge stack in xfs_trans_init
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* due to register overflow from temporaries in the calculations.
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*/
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STATIC uint
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xfs_calc_write_reservation(xfs_mount_t *mp)
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{
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return XFS_CALC_WRITE_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp);
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}
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STATIC uint
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xfs_calc_itruncate_reservation(xfs_mount_t *mp)
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{
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return XFS_CALC_ITRUNCATE_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp);
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}
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STATIC uint
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xfs_calc_rename_reservation(xfs_mount_t *mp)
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{
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return XFS_CALC_RENAME_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp);
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}
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STATIC uint
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xfs_calc_link_reservation(xfs_mount_t *mp)
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{
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return XFS_CALC_LINK_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp);
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}
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STATIC uint
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xfs_calc_remove_reservation(xfs_mount_t *mp)
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{
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return XFS_CALC_REMOVE_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp);
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}
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STATIC uint
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xfs_calc_symlink_reservation(xfs_mount_t *mp)
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{
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return XFS_CALC_SYMLINK_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp);
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}
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STATIC uint
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xfs_calc_create_reservation(xfs_mount_t *mp)
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{
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return XFS_CALC_CREATE_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp);
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}
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STATIC uint
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xfs_calc_mkdir_reservation(xfs_mount_t *mp)
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{
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return XFS_CALC_MKDIR_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp);
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}
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STATIC uint
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xfs_calc_ifree_reservation(xfs_mount_t *mp)
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{
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return XFS_CALC_IFREE_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp);
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}
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STATIC uint
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xfs_calc_ichange_reservation(xfs_mount_t *mp)
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{
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return XFS_CALC_ICHANGE_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp);
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}
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STATIC uint
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xfs_calc_growdata_reservation(xfs_mount_t *mp)
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{
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return XFS_CALC_GROWDATA_LOG_RES(mp);
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}
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STATIC uint
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xfs_calc_growrtalloc_reservation(xfs_mount_t *mp)
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{
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return XFS_CALC_GROWRTALLOC_LOG_RES(mp);
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}
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STATIC uint
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xfs_calc_growrtzero_reservation(xfs_mount_t *mp)
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{
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return XFS_CALC_GROWRTZERO_LOG_RES(mp);
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}
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STATIC uint
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xfs_calc_growrtfree_reservation(xfs_mount_t *mp)
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{
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return XFS_CALC_GROWRTFREE_LOG_RES(mp);
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}
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STATIC uint
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xfs_calc_swrite_reservation(xfs_mount_t *mp)
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{
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return XFS_CALC_SWRITE_LOG_RES(mp);
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}
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STATIC uint
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xfs_calc_writeid_reservation(xfs_mount_t *mp)
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{
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return XFS_CALC_WRITEID_LOG_RES(mp);
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}
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STATIC uint
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xfs_calc_addafork_reservation(xfs_mount_t *mp)
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{
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return XFS_CALC_ADDAFORK_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp);
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}
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STATIC uint
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xfs_calc_attrinval_reservation(xfs_mount_t *mp)
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{
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return XFS_CALC_ATTRINVAL_LOG_RES(mp);
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}
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STATIC uint
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xfs_calc_attrset_reservation(xfs_mount_t *mp)
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{
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return XFS_CALC_ATTRSET_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp);
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}
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STATIC uint
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xfs_calc_attrrm_reservation(xfs_mount_t *mp)
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{
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return XFS_CALC_ATTRRM_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp);
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}
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STATIC uint
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xfs_calc_clear_agi_bucket_reservation(xfs_mount_t *mp)
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{
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return XFS_CALC_CLEAR_AGI_BUCKET_LOG_RES(mp);
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}
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/*
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* Initialize the precomputed transaction reservation values
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* in the mount structure.
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*/
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void
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xfs_trans_init(
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xfs_mount_t *mp)
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{
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xfs_trans_reservations_t *resp;
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resp = &(mp->m_reservations);
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resp->tr_write = xfs_calc_write_reservation(mp);
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resp->tr_itruncate = xfs_calc_itruncate_reservation(mp);
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resp->tr_rename = xfs_calc_rename_reservation(mp);
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resp->tr_link = xfs_calc_link_reservation(mp);
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resp->tr_remove = xfs_calc_remove_reservation(mp);
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resp->tr_symlink = xfs_calc_symlink_reservation(mp);
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resp->tr_create = xfs_calc_create_reservation(mp);
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resp->tr_mkdir = xfs_calc_mkdir_reservation(mp);
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resp->tr_ifree = xfs_calc_ifree_reservation(mp);
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resp->tr_ichange = xfs_calc_ichange_reservation(mp);
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resp->tr_growdata = xfs_calc_growdata_reservation(mp);
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resp->tr_swrite = xfs_calc_swrite_reservation(mp);
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resp->tr_writeid = xfs_calc_writeid_reservation(mp);
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resp->tr_addafork = xfs_calc_addafork_reservation(mp);
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resp->tr_attrinval = xfs_calc_attrinval_reservation(mp);
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resp->tr_attrset = xfs_calc_attrset_reservation(mp);
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resp->tr_attrrm = xfs_calc_attrrm_reservation(mp);
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resp->tr_clearagi = xfs_calc_clear_agi_bucket_reservation(mp);
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resp->tr_growrtalloc = xfs_calc_growrtalloc_reservation(mp);
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resp->tr_growrtzero = xfs_calc_growrtzero_reservation(mp);
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resp->tr_growrtfree = xfs_calc_growrtfree_reservation(mp);
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}
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/*
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* This routine is called to allocate a transaction structure.
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* The type parameter indicates the type of the transaction. These
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* are enumerated in xfs_trans.h.
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*
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* Dynamically allocate the transaction structure from the transaction
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* zone, initialize it, and return it to the caller.
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*/
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xfs_trans_t *
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xfs_trans_alloc(
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xfs_mount_t *mp,
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uint type)
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{
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xfs_wait_for_freeze(mp, SB_FREEZE_TRANS);
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return _xfs_trans_alloc(mp, type);
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}
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xfs_trans_t *
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_xfs_trans_alloc(
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xfs_mount_t *mp,
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uint type)
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{
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xfs_trans_t *tp;
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atomic_inc(&mp->m_active_trans);
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tp = kmem_zone_zalloc(xfs_trans_zone, KM_SLEEP);
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tp->t_magic = XFS_TRANS_MAGIC;
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tp->t_type = type;
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tp->t_mountp = mp;
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tp->t_items_free = XFS_LIC_NUM_SLOTS;
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tp->t_busy_free = XFS_LBC_NUM_SLOTS;
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xfs_lic_init(&(tp->t_items));
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XFS_LBC_INIT(&(tp->t_busy));
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return tp;
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}
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/*
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* This is called to create a new transaction which will share the
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* permanent log reservation of the given transaction. The remaining
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* unused block and rt extent reservations are also inherited. This
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* implies that the original transaction is no longer allowed to allocate
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* blocks. Locks and log items, however, are no inherited. They must
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* be added to the new transaction explicitly.
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*/
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xfs_trans_t *
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xfs_trans_dup(
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xfs_trans_t *tp)
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{
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xfs_trans_t *ntp;
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ntp = kmem_zone_zalloc(xfs_trans_zone, KM_SLEEP);
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/*
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* Initialize the new transaction structure.
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*/
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ntp->t_magic = XFS_TRANS_MAGIC;
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ntp->t_type = tp->t_type;
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ntp->t_mountp = tp->t_mountp;
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ntp->t_items_free = XFS_LIC_NUM_SLOTS;
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ntp->t_busy_free = XFS_LBC_NUM_SLOTS;
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xfs_lic_init(&(ntp->t_items));
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XFS_LBC_INIT(&(ntp->t_busy));
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ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES);
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ASSERT(tp->t_ticket != NULL);
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ntp->t_flags = XFS_TRANS_PERM_LOG_RES | (tp->t_flags & XFS_TRANS_RESERVE);
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ntp->t_ticket = tp->t_ticket;
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ntp->t_blk_res = tp->t_blk_res - tp->t_blk_res_used;
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tp->t_blk_res = tp->t_blk_res_used;
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ntp->t_rtx_res = tp->t_rtx_res - tp->t_rtx_res_used;
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tp->t_rtx_res = tp->t_rtx_res_used;
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ntp->t_pflags = tp->t_pflags;
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XFS_TRANS_DUP_DQINFO(tp->t_mountp, tp, ntp);
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atomic_inc(&tp->t_mountp->m_active_trans);
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return ntp;
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}
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/*
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* This is called to reserve free disk blocks and log space for the
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* given transaction. This must be done before allocating any resources
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* within the transaction.
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*
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* This will return ENOSPC if there are not enough blocks available.
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* It will sleep waiting for available log space.
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* The only valid value for the flags parameter is XFS_RES_LOG_PERM, which
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* is used by long running transactions. If any one of the reservations
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* fails then they will all be backed out.
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*
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* This does not do quota reservations. That typically is done by the
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* caller afterwards.
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*/
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int
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xfs_trans_reserve(
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xfs_trans_t *tp,
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uint blocks,
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uint logspace,
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uint rtextents,
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uint flags,
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uint logcount)
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{
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int log_flags;
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int error = 0;
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int rsvd = (tp->t_flags & XFS_TRANS_RESERVE) != 0;
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/* Mark this thread as being in a transaction */
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current_set_flags_nested(&tp->t_pflags, PF_FSTRANS);
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/*
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* Attempt to reserve the needed disk blocks by decrementing
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* the number needed from the number available. This will
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* fail if the count would go below zero.
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*/
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if (blocks > 0) {
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error = xfs_mod_incore_sb(tp->t_mountp, XFS_SBS_FDBLOCKS,
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-((int64_t)blocks), rsvd);
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if (error != 0) {
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current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS);
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return (XFS_ERROR(ENOSPC));
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}
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tp->t_blk_res += blocks;
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}
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/*
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* Reserve the log space needed for this transaction.
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*/
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if (logspace > 0) {
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ASSERT((tp->t_log_res == 0) || (tp->t_log_res == logspace));
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ASSERT((tp->t_log_count == 0) ||
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(tp->t_log_count == logcount));
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if (flags & XFS_TRANS_PERM_LOG_RES) {
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log_flags = XFS_LOG_PERM_RESERV;
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tp->t_flags |= XFS_TRANS_PERM_LOG_RES;
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} else {
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ASSERT(tp->t_ticket == NULL);
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ASSERT(!(tp->t_flags & XFS_TRANS_PERM_LOG_RES));
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log_flags = 0;
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}
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error = xfs_log_reserve(tp->t_mountp, logspace, logcount,
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&tp->t_ticket,
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XFS_TRANSACTION, log_flags, tp->t_type);
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if (error) {
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goto undo_blocks;
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}
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tp->t_log_res = logspace;
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tp->t_log_count = logcount;
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}
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/*
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* Attempt to reserve the needed realtime extents by decrementing
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* the number needed from the number available. This will
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* fail if the count would go below zero.
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*/
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if (rtextents > 0) {
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error = xfs_mod_incore_sb(tp->t_mountp, XFS_SBS_FREXTENTS,
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-((int64_t)rtextents), rsvd);
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if (error) {
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error = XFS_ERROR(ENOSPC);
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goto undo_log;
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}
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tp->t_rtx_res += rtextents;
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}
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return 0;
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/*
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* Error cases jump to one of these labels to undo any
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* reservations which have already been performed.
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*/
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undo_log:
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if (logspace > 0) {
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if (flags & XFS_TRANS_PERM_LOG_RES) {
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log_flags = XFS_LOG_REL_PERM_RESERV;
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} else {
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log_flags = 0;
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}
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xfs_log_done(tp->t_mountp, tp->t_ticket, NULL, log_flags);
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tp->t_ticket = NULL;
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tp->t_log_res = 0;
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tp->t_flags &= ~XFS_TRANS_PERM_LOG_RES;
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}
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undo_blocks:
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if (blocks > 0) {
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(void) xfs_mod_incore_sb(tp->t_mountp, XFS_SBS_FDBLOCKS,
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(int64_t)blocks, rsvd);
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tp->t_blk_res = 0;
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}
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current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS);
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return error;
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}
|
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|
|
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/*
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* Record the indicated change to the given field for application
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* to the file system's superblock when the transaction commits.
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* For now, just store the change in the transaction structure.
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*
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* Mark the transaction structure to indicate that the superblock
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* needs to be updated before committing.
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*
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* Because we may not be keeping track of allocated/free inodes and
|
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* used filesystem blocks in the superblock, we do not mark the
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* superblock dirty in this transaction if we modify these fields.
|
|
* We still need to update the transaction deltas so that they get
|
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* applied to the incore superblock, but we don't want them to
|
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* cause the superblock to get locked and logged if these are the
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* only fields in the superblock that the transaction modifies.
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*/
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void
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xfs_trans_mod_sb(
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xfs_trans_t *tp,
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uint field,
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int64_t delta)
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{
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uint32_t flags = (XFS_TRANS_DIRTY|XFS_TRANS_SB_DIRTY);
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xfs_mount_t *mp = tp->t_mountp;
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|
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switch (field) {
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case XFS_TRANS_SB_ICOUNT:
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tp->t_icount_delta += delta;
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if (xfs_sb_version_haslazysbcount(&mp->m_sb))
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flags &= ~XFS_TRANS_SB_DIRTY;
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break;
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case XFS_TRANS_SB_IFREE:
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tp->t_ifree_delta += delta;
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if (xfs_sb_version_haslazysbcount(&mp->m_sb))
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flags &= ~XFS_TRANS_SB_DIRTY;
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break;
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case XFS_TRANS_SB_FDBLOCKS:
|
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/*
|
|
* Track the number of blocks allocated in the
|
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* transaction. Make sure it does not exceed the
|
|
* number reserved.
|
|
*/
|
|
if (delta < 0) {
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|
tp->t_blk_res_used += (uint)-delta;
|
|
ASSERT(tp->t_blk_res_used <= tp->t_blk_res);
|
|
}
|
|
tp->t_fdblocks_delta += delta;
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if (xfs_sb_version_haslazysbcount(&mp->m_sb))
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flags &= ~XFS_TRANS_SB_DIRTY;
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break;
|
|
case XFS_TRANS_SB_RES_FDBLOCKS:
|
|
/*
|
|
* The allocation has already been applied to the
|
|
* in-core superblock's counter. This should only
|
|
* be applied to the on-disk superblock.
|
|
*/
|
|
ASSERT(delta < 0);
|
|
tp->t_res_fdblocks_delta += delta;
|
|
if (xfs_sb_version_haslazysbcount(&mp->m_sb))
|
|
flags &= ~XFS_TRANS_SB_DIRTY;
|
|
break;
|
|
case XFS_TRANS_SB_FREXTENTS:
|
|
/*
|
|
* Track the number of blocks allocated in the
|
|
* transaction. Make sure it does not exceed the
|
|
* number reserved.
|
|
*/
|
|
if (delta < 0) {
|
|
tp->t_rtx_res_used += (uint)-delta;
|
|
ASSERT(tp->t_rtx_res_used <= tp->t_rtx_res);
|
|
}
|
|
tp->t_frextents_delta += delta;
|
|
break;
|
|
case XFS_TRANS_SB_RES_FREXTENTS:
|
|
/*
|
|
* The allocation has already been applied to the
|
|
* in-core superblock's counter. This should only
|
|
* be applied to the on-disk superblock.
|
|
*/
|
|
ASSERT(delta < 0);
|
|
tp->t_res_frextents_delta += delta;
|
|
break;
|
|
case XFS_TRANS_SB_DBLOCKS:
|
|
ASSERT(delta > 0);
|
|
tp->t_dblocks_delta += delta;
|
|
break;
|
|
case XFS_TRANS_SB_AGCOUNT:
|
|
ASSERT(delta > 0);
|
|
tp->t_agcount_delta += delta;
|
|
break;
|
|
case XFS_TRANS_SB_IMAXPCT:
|
|
tp->t_imaxpct_delta += delta;
|
|
break;
|
|
case XFS_TRANS_SB_REXTSIZE:
|
|
tp->t_rextsize_delta += delta;
|
|
break;
|
|
case XFS_TRANS_SB_RBMBLOCKS:
|
|
tp->t_rbmblocks_delta += delta;
|
|
break;
|
|
case XFS_TRANS_SB_RBLOCKS:
|
|
tp->t_rblocks_delta += delta;
|
|
break;
|
|
case XFS_TRANS_SB_REXTENTS:
|
|
tp->t_rextents_delta += delta;
|
|
break;
|
|
case XFS_TRANS_SB_REXTSLOG:
|
|
tp->t_rextslog_delta += delta;
|
|
break;
|
|
default:
|
|
ASSERT(0);
|
|
return;
|
|
}
|
|
|
|
tp->t_flags |= flags;
|
|
}
|
|
|
|
/*
|
|
* xfs_trans_apply_sb_deltas() is called from the commit code
|
|
* to bring the superblock buffer into the current transaction
|
|
* and modify it as requested by earlier calls to xfs_trans_mod_sb().
|
|
*
|
|
* For now we just look at each field allowed to change and change
|
|
* it if necessary.
|
|
*/
|
|
STATIC void
|
|
xfs_trans_apply_sb_deltas(
|
|
xfs_trans_t *tp)
|
|
{
|
|
xfs_dsb_t *sbp;
|
|
xfs_buf_t *bp;
|
|
int whole = 0;
|
|
|
|
bp = xfs_trans_getsb(tp, tp->t_mountp, 0);
|
|
sbp = XFS_BUF_TO_SBP(bp);
|
|
|
|
/*
|
|
* Check that superblock mods match the mods made to AGF counters.
|
|
*/
|
|
ASSERT((tp->t_fdblocks_delta + tp->t_res_fdblocks_delta) ==
|
|
(tp->t_ag_freeblks_delta + tp->t_ag_flist_delta +
|
|
tp->t_ag_btree_delta));
|
|
|
|
/*
|
|
* Only update the superblock counters if we are logging them
|
|
*/
|
|
if (!xfs_sb_version_haslazysbcount(&(tp->t_mountp->m_sb))) {
|
|
if (tp->t_icount_delta)
|
|
be64_add_cpu(&sbp->sb_icount, tp->t_icount_delta);
|
|
if (tp->t_ifree_delta)
|
|
be64_add_cpu(&sbp->sb_ifree, tp->t_ifree_delta);
|
|
if (tp->t_fdblocks_delta)
|
|
be64_add_cpu(&sbp->sb_fdblocks, tp->t_fdblocks_delta);
|
|
if (tp->t_res_fdblocks_delta)
|
|
be64_add_cpu(&sbp->sb_fdblocks, tp->t_res_fdblocks_delta);
|
|
}
|
|
|
|
if (tp->t_frextents_delta)
|
|
be64_add_cpu(&sbp->sb_frextents, tp->t_frextents_delta);
|
|
if (tp->t_res_frextents_delta)
|
|
be64_add_cpu(&sbp->sb_frextents, tp->t_res_frextents_delta);
|
|
|
|
if (tp->t_dblocks_delta) {
|
|
be64_add_cpu(&sbp->sb_dblocks, tp->t_dblocks_delta);
|
|
whole = 1;
|
|
}
|
|
if (tp->t_agcount_delta) {
|
|
be32_add_cpu(&sbp->sb_agcount, tp->t_agcount_delta);
|
|
whole = 1;
|
|
}
|
|
if (tp->t_imaxpct_delta) {
|
|
sbp->sb_imax_pct += tp->t_imaxpct_delta;
|
|
whole = 1;
|
|
}
|
|
if (tp->t_rextsize_delta) {
|
|
be32_add_cpu(&sbp->sb_rextsize, tp->t_rextsize_delta);
|
|
whole = 1;
|
|
}
|
|
if (tp->t_rbmblocks_delta) {
|
|
be32_add_cpu(&sbp->sb_rbmblocks, tp->t_rbmblocks_delta);
|
|
whole = 1;
|
|
}
|
|
if (tp->t_rblocks_delta) {
|
|
be64_add_cpu(&sbp->sb_rblocks, tp->t_rblocks_delta);
|
|
whole = 1;
|
|
}
|
|
if (tp->t_rextents_delta) {
|
|
be64_add_cpu(&sbp->sb_rextents, tp->t_rextents_delta);
|
|
whole = 1;
|
|
}
|
|
if (tp->t_rextslog_delta) {
|
|
sbp->sb_rextslog += tp->t_rextslog_delta;
|
|
whole = 1;
|
|
}
|
|
|
|
if (whole)
|
|
/*
|
|
* Log the whole thing, the fields are noncontiguous.
|
|
*/
|
|
xfs_trans_log_buf(tp, bp, 0, sizeof(xfs_dsb_t) - 1);
|
|
else
|
|
/*
|
|
* Since all the modifiable fields are contiguous, we
|
|
* can get away with this.
|
|
*/
|
|
xfs_trans_log_buf(tp, bp, offsetof(xfs_dsb_t, sb_icount),
|
|
offsetof(xfs_dsb_t, sb_frextents) +
|
|
sizeof(sbp->sb_frextents) - 1);
|
|
|
|
tp->t_mountp->m_super->s_dirt = 1;
|
|
}
|
|
|
|
/*
|
|
* xfs_trans_unreserve_and_mod_sb() is called to release unused reservations
|
|
* and apply superblock counter changes to the in-core superblock. The
|
|
* t_res_fdblocks_delta and t_res_frextents_delta fields are explicitly NOT
|
|
* applied to the in-core superblock. The idea is that that has already been
|
|
* done.
|
|
*
|
|
* This is done efficiently with a single call to xfs_mod_incore_sb_batch().
|
|
* However, we have to ensure that we only modify each superblock field only
|
|
* once because the application of the delta values may not be atomic. That can
|
|
* lead to ENOSPC races occurring if we have two separate modifcations of the
|
|
* free space counter to put back the entire reservation and then take away
|
|
* what we used.
|
|
*
|
|
* If we are not logging superblock counters, then the inode allocated/free and
|
|
* used block counts are not updated in the on disk superblock. In this case,
|
|
* XFS_TRANS_SB_DIRTY will not be set when the transaction is updated but we
|
|
* still need to update the incore superblock with the changes.
|
|
*/
|
|
STATIC void
|
|
xfs_trans_unreserve_and_mod_sb(
|
|
xfs_trans_t *tp)
|
|
{
|
|
xfs_mod_sb_t msb[14]; /* If you add cases, add entries */
|
|
xfs_mod_sb_t *msbp;
|
|
xfs_mount_t *mp = tp->t_mountp;
|
|
/* REFERENCED */
|
|
int error;
|
|
int rsvd;
|
|
int64_t blkdelta = 0;
|
|
int64_t rtxdelta = 0;
|
|
|
|
msbp = msb;
|
|
rsvd = (tp->t_flags & XFS_TRANS_RESERVE) != 0;
|
|
|
|
/* calculate free blocks delta */
|
|
if (tp->t_blk_res > 0)
|
|
blkdelta = tp->t_blk_res;
|
|
|
|
if ((tp->t_fdblocks_delta != 0) &&
|
|
(xfs_sb_version_haslazysbcount(&mp->m_sb) ||
|
|
(tp->t_flags & XFS_TRANS_SB_DIRTY)))
|
|
blkdelta += tp->t_fdblocks_delta;
|
|
|
|
if (blkdelta != 0) {
|
|
msbp->msb_field = XFS_SBS_FDBLOCKS;
|
|
msbp->msb_delta = blkdelta;
|
|
msbp++;
|
|
}
|
|
|
|
/* calculate free realtime extents delta */
|
|
if (tp->t_rtx_res > 0)
|
|
rtxdelta = tp->t_rtx_res;
|
|
|
|
if ((tp->t_frextents_delta != 0) &&
|
|
(tp->t_flags & XFS_TRANS_SB_DIRTY))
|
|
rtxdelta += tp->t_frextents_delta;
|
|
|
|
if (rtxdelta != 0) {
|
|
msbp->msb_field = XFS_SBS_FREXTENTS;
|
|
msbp->msb_delta = rtxdelta;
|
|
msbp++;
|
|
}
|
|
|
|
/* apply remaining deltas */
|
|
|
|
if (xfs_sb_version_haslazysbcount(&mp->m_sb) ||
|
|
(tp->t_flags & XFS_TRANS_SB_DIRTY)) {
|
|
if (tp->t_icount_delta != 0) {
|
|
msbp->msb_field = XFS_SBS_ICOUNT;
|
|
msbp->msb_delta = tp->t_icount_delta;
|
|
msbp++;
|
|
}
|
|
if (tp->t_ifree_delta != 0) {
|
|
msbp->msb_field = XFS_SBS_IFREE;
|
|
msbp->msb_delta = tp->t_ifree_delta;
|
|
msbp++;
|
|
}
|
|
}
|
|
|
|
if (tp->t_flags & XFS_TRANS_SB_DIRTY) {
|
|
if (tp->t_dblocks_delta != 0) {
|
|
msbp->msb_field = XFS_SBS_DBLOCKS;
|
|
msbp->msb_delta = tp->t_dblocks_delta;
|
|
msbp++;
|
|
}
|
|
if (tp->t_agcount_delta != 0) {
|
|
msbp->msb_field = XFS_SBS_AGCOUNT;
|
|
msbp->msb_delta = tp->t_agcount_delta;
|
|
msbp++;
|
|
}
|
|
if (tp->t_imaxpct_delta != 0) {
|
|
msbp->msb_field = XFS_SBS_IMAX_PCT;
|
|
msbp->msb_delta = tp->t_imaxpct_delta;
|
|
msbp++;
|
|
}
|
|
if (tp->t_rextsize_delta != 0) {
|
|
msbp->msb_field = XFS_SBS_REXTSIZE;
|
|
msbp->msb_delta = tp->t_rextsize_delta;
|
|
msbp++;
|
|
}
|
|
if (tp->t_rbmblocks_delta != 0) {
|
|
msbp->msb_field = XFS_SBS_RBMBLOCKS;
|
|
msbp->msb_delta = tp->t_rbmblocks_delta;
|
|
msbp++;
|
|
}
|
|
if (tp->t_rblocks_delta != 0) {
|
|
msbp->msb_field = XFS_SBS_RBLOCKS;
|
|
msbp->msb_delta = tp->t_rblocks_delta;
|
|
msbp++;
|
|
}
|
|
if (tp->t_rextents_delta != 0) {
|
|
msbp->msb_field = XFS_SBS_REXTENTS;
|
|
msbp->msb_delta = tp->t_rextents_delta;
|
|
msbp++;
|
|
}
|
|
if (tp->t_rextslog_delta != 0) {
|
|
msbp->msb_field = XFS_SBS_REXTSLOG;
|
|
msbp->msb_delta = tp->t_rextslog_delta;
|
|
msbp++;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* If we need to change anything, do it.
|
|
*/
|
|
if (msbp > msb) {
|
|
error = xfs_mod_incore_sb_batch(tp->t_mountp, msb,
|
|
(uint)(msbp - msb), rsvd);
|
|
ASSERT(error == 0);
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* xfs_trans_commit
|
|
*
|
|
* Commit the given transaction to the log a/synchronously.
|
|
*
|
|
* XFS disk error handling mechanism is not based on a typical
|
|
* transaction abort mechanism. Logically after the filesystem
|
|
* gets marked 'SHUTDOWN', we can't let any new transactions
|
|
* be durable - ie. committed to disk - because some metadata might
|
|
* be inconsistent. In such cases, this returns an error, and the
|
|
* caller may assume that all locked objects joined to the transaction
|
|
* have already been unlocked as if the commit had succeeded.
|
|
* Do not reference the transaction structure after this call.
|
|
*/
|
|
/*ARGSUSED*/
|
|
int
|
|
_xfs_trans_commit(
|
|
xfs_trans_t *tp,
|
|
uint flags,
|
|
int *log_flushed)
|
|
{
|
|
xfs_log_iovec_t *log_vector;
|
|
int nvec;
|
|
xfs_mount_t *mp;
|
|
xfs_lsn_t commit_lsn;
|
|
/* REFERENCED */
|
|
int error;
|
|
int log_flags;
|
|
int sync;
|
|
#define XFS_TRANS_LOGVEC_COUNT 16
|
|
xfs_log_iovec_t log_vector_fast[XFS_TRANS_LOGVEC_COUNT];
|
|
void *commit_iclog;
|
|
int shutdown;
|
|
|
|
commit_lsn = -1;
|
|
|
|
/*
|
|
* Determine whether this commit is releasing a permanent
|
|
* log reservation or not.
|
|
*/
|
|
if (flags & XFS_TRANS_RELEASE_LOG_RES) {
|
|
ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES);
|
|
log_flags = XFS_LOG_REL_PERM_RESERV;
|
|
} else {
|
|
log_flags = 0;
|
|
}
|
|
mp = tp->t_mountp;
|
|
|
|
/*
|
|
* If there is nothing to be logged by the transaction,
|
|
* then unlock all of the items associated with the
|
|
* transaction and free the transaction structure.
|
|
* Also make sure to return any reserved blocks to
|
|
* the free pool.
|
|
*/
|
|
shut_us_down:
|
|
shutdown = XFS_FORCED_SHUTDOWN(mp) ? EIO : 0;
|
|
if (!(tp->t_flags & XFS_TRANS_DIRTY) || shutdown) {
|
|
xfs_trans_unreserve_and_mod_sb(tp);
|
|
/*
|
|
* It is indeed possible for the transaction to be
|
|
* not dirty but the dqinfo portion to be. All that
|
|
* means is that we have some (non-persistent) quota
|
|
* reservations that need to be unreserved.
|
|
*/
|
|
XFS_TRANS_UNRESERVE_AND_MOD_DQUOTS(mp, tp);
|
|
if (tp->t_ticket) {
|
|
commit_lsn = xfs_log_done(mp, tp->t_ticket,
|
|
NULL, log_flags);
|
|
if (commit_lsn == -1 && !shutdown)
|
|
shutdown = XFS_ERROR(EIO);
|
|
}
|
|
current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS);
|
|
xfs_trans_free_items(tp, shutdown? XFS_TRANS_ABORT : 0);
|
|
xfs_trans_free_busy(tp);
|
|
xfs_trans_free(tp);
|
|
XFS_STATS_INC(xs_trans_empty);
|
|
return (shutdown);
|
|
}
|
|
ASSERT(tp->t_ticket != NULL);
|
|
|
|
/*
|
|
* If we need to update the superblock, then do it now.
|
|
*/
|
|
if (tp->t_flags & XFS_TRANS_SB_DIRTY) {
|
|
xfs_trans_apply_sb_deltas(tp);
|
|
}
|
|
XFS_TRANS_APPLY_DQUOT_DELTAS(mp, tp);
|
|
|
|
/*
|
|
* Ask each log item how many log_vector entries it will
|
|
* need so we can figure out how many to allocate.
|
|
* Try to avoid the kmem_alloc() call in the common case
|
|
* by using a vector from the stack when it fits.
|
|
*/
|
|
nvec = xfs_trans_count_vecs(tp);
|
|
if (nvec == 0) {
|
|
xfs_force_shutdown(mp, SHUTDOWN_LOG_IO_ERROR);
|
|
goto shut_us_down;
|
|
} else if (nvec <= XFS_TRANS_LOGVEC_COUNT) {
|
|
log_vector = log_vector_fast;
|
|
} else {
|
|
log_vector = (xfs_log_iovec_t *)kmem_alloc(nvec *
|
|
sizeof(xfs_log_iovec_t),
|
|
KM_SLEEP);
|
|
}
|
|
|
|
/*
|
|
* Fill in the log_vector and pin the logged items, and
|
|
* then write the transaction to the log.
|
|
*/
|
|
xfs_trans_fill_vecs(tp, log_vector);
|
|
|
|
error = xfs_log_write(mp, log_vector, nvec, tp->t_ticket, &(tp->t_lsn));
|
|
|
|
/*
|
|
* The transaction is committed incore here, and can go out to disk
|
|
* at any time after this call. However, all the items associated
|
|
* with the transaction are still locked and pinned in memory.
|
|
*/
|
|
commit_lsn = xfs_log_done(mp, tp->t_ticket, &commit_iclog, log_flags);
|
|
|
|
tp->t_commit_lsn = commit_lsn;
|
|
if (nvec > XFS_TRANS_LOGVEC_COUNT) {
|
|
kmem_free(log_vector);
|
|
}
|
|
|
|
/*
|
|
* If we got a log write error. Unpin the logitems that we
|
|
* had pinned, clean up, free trans structure, and return error.
|
|
*/
|
|
if (error || commit_lsn == -1) {
|
|
current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS);
|
|
xfs_trans_uncommit(tp, flags|XFS_TRANS_ABORT);
|
|
return XFS_ERROR(EIO);
|
|
}
|
|
|
|
/*
|
|
* Once the transaction has committed, unused
|
|
* reservations need to be released and changes to
|
|
* the superblock need to be reflected in the in-core
|
|
* version. Do that now.
|
|
*/
|
|
xfs_trans_unreserve_and_mod_sb(tp);
|
|
|
|
sync = tp->t_flags & XFS_TRANS_SYNC;
|
|
|
|
/*
|
|
* Tell the LM to call the transaction completion routine
|
|
* when the log write with LSN commit_lsn completes (e.g.
|
|
* when the transaction commit really hits the on-disk log).
|
|
* After this call we cannot reference tp, because the call
|
|
* can happen at any time and the call will free the transaction
|
|
* structure pointed to by tp. The only case where we call
|
|
* the completion routine (xfs_trans_committed) directly is
|
|
* if the log is turned off on a debug kernel or we're
|
|
* running in simulation mode (the log is explicitly turned
|
|
* off).
|
|
*/
|
|
tp->t_logcb.cb_func = (void(*)(void*, int))xfs_trans_committed;
|
|
tp->t_logcb.cb_arg = tp;
|
|
|
|
/*
|
|
* We need to pass the iclog buffer which was used for the
|
|
* transaction commit record into this function, and attach
|
|
* the callback to it. The callback must be attached before
|
|
* the items are unlocked to avoid racing with other threads
|
|
* waiting for an item to unlock.
|
|
*/
|
|
shutdown = xfs_log_notify(mp, commit_iclog, &(tp->t_logcb));
|
|
|
|
/*
|
|
* Mark this thread as no longer being in a transaction
|
|
*/
|
|
current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS);
|
|
|
|
/*
|
|
* Once all the items of the transaction have been copied
|
|
* to the in core log and the callback is attached, the
|
|
* items can be unlocked.
|
|
*
|
|
* This will free descriptors pointing to items which were
|
|
* not logged since there is nothing more to do with them.
|
|
* For items which were logged, we will keep pointers to them
|
|
* so they can be unpinned after the transaction commits to disk.
|
|
* This will also stamp each modified meta-data item with
|
|
* the commit lsn of this transaction for dependency tracking
|
|
* purposes.
|
|
*/
|
|
xfs_trans_unlock_items(tp, commit_lsn);
|
|
|
|
/*
|
|
* If we detected a log error earlier, finish committing
|
|
* the transaction now (unpin log items, etc).
|
|
*
|
|
* Order is critical here, to avoid using the transaction
|
|
* pointer after its been freed (by xfs_trans_committed
|
|
* either here now, or as a callback). We cannot do this
|
|
* step inside xfs_log_notify as was done earlier because
|
|
* of this issue.
|
|
*/
|
|
if (shutdown)
|
|
xfs_trans_committed(tp, XFS_LI_ABORTED);
|
|
|
|
/*
|
|
* Now that the xfs_trans_committed callback has been attached,
|
|
* and the items are released we can finally allow the iclog to
|
|
* go to disk.
|
|
*/
|
|
error = xfs_log_release_iclog(mp, commit_iclog);
|
|
|
|
/*
|
|
* If the transaction needs to be synchronous, then force the
|
|
* log out now and wait for it.
|
|
*/
|
|
if (sync) {
|
|
if (!error) {
|
|
error = _xfs_log_force(mp, commit_lsn,
|
|
XFS_LOG_FORCE | XFS_LOG_SYNC,
|
|
log_flushed);
|
|
}
|
|
XFS_STATS_INC(xs_trans_sync);
|
|
} else {
|
|
XFS_STATS_INC(xs_trans_async);
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
|
|
/*
|
|
* Total up the number of log iovecs needed to commit this
|
|
* transaction. The transaction itself needs one for the
|
|
* transaction header. Ask each dirty item in turn how many
|
|
* it needs to get the total.
|
|
*/
|
|
STATIC uint
|
|
xfs_trans_count_vecs(
|
|
xfs_trans_t *tp)
|
|
{
|
|
int nvecs;
|
|
xfs_log_item_desc_t *lidp;
|
|
|
|
nvecs = 1;
|
|
lidp = xfs_trans_first_item(tp);
|
|
ASSERT(lidp != NULL);
|
|
|
|
/* In the non-debug case we need to start bailing out if we
|
|
* didn't find a log_item here, return zero and let trans_commit
|
|
* deal with it.
|
|
*/
|
|
if (lidp == NULL)
|
|
return 0;
|
|
|
|
while (lidp != NULL) {
|
|
/*
|
|
* Skip items which aren't dirty in this transaction.
|
|
*/
|
|
if (!(lidp->lid_flags & XFS_LID_DIRTY)) {
|
|
lidp = xfs_trans_next_item(tp, lidp);
|
|
continue;
|
|
}
|
|
lidp->lid_size = IOP_SIZE(lidp->lid_item);
|
|
nvecs += lidp->lid_size;
|
|
lidp = xfs_trans_next_item(tp, lidp);
|
|
}
|
|
|
|
return nvecs;
|
|
}
|
|
|
|
/*
|
|
* Called from the trans_commit code when we notice that
|
|
* the filesystem is in the middle of a forced shutdown.
|
|
*/
|
|
STATIC void
|
|
xfs_trans_uncommit(
|
|
xfs_trans_t *tp,
|
|
uint flags)
|
|
{
|
|
xfs_log_item_desc_t *lidp;
|
|
|
|
for (lidp = xfs_trans_first_item(tp);
|
|
lidp != NULL;
|
|
lidp = xfs_trans_next_item(tp, lidp)) {
|
|
/*
|
|
* Unpin all but those that aren't dirty.
|
|
*/
|
|
if (lidp->lid_flags & XFS_LID_DIRTY)
|
|
IOP_UNPIN_REMOVE(lidp->lid_item, tp);
|
|
}
|
|
|
|
xfs_trans_unreserve_and_mod_sb(tp);
|
|
XFS_TRANS_UNRESERVE_AND_MOD_DQUOTS(tp->t_mountp, tp);
|
|
|
|
xfs_trans_free_items(tp, flags);
|
|
xfs_trans_free_busy(tp);
|
|
xfs_trans_free(tp);
|
|
}
|
|
|
|
/*
|
|
* Fill in the vector with pointers to data to be logged
|
|
* by this transaction. The transaction header takes
|
|
* the first vector, and then each dirty item takes the
|
|
* number of vectors it indicated it needed in xfs_trans_count_vecs().
|
|
*
|
|
* As each item fills in the entries it needs, also pin the item
|
|
* so that it cannot be flushed out until the log write completes.
|
|
*/
|
|
STATIC void
|
|
xfs_trans_fill_vecs(
|
|
xfs_trans_t *tp,
|
|
xfs_log_iovec_t *log_vector)
|
|
{
|
|
xfs_log_item_desc_t *lidp;
|
|
xfs_log_iovec_t *vecp;
|
|
uint nitems;
|
|
|
|
/*
|
|
* Skip over the entry for the transaction header, we'll
|
|
* fill that in at the end.
|
|
*/
|
|
vecp = log_vector + 1; /* pointer arithmetic */
|
|
|
|
nitems = 0;
|
|
lidp = xfs_trans_first_item(tp);
|
|
ASSERT(lidp != NULL);
|
|
while (lidp != NULL) {
|
|
/*
|
|
* Skip items which aren't dirty in this transaction.
|
|
*/
|
|
if (!(lidp->lid_flags & XFS_LID_DIRTY)) {
|
|
lidp = xfs_trans_next_item(tp, lidp);
|
|
continue;
|
|
}
|
|
/*
|
|
* The item may be marked dirty but not log anything.
|
|
* This can be used to get called when a transaction
|
|
* is committed.
|
|
*/
|
|
if (lidp->lid_size) {
|
|
nitems++;
|
|
}
|
|
IOP_FORMAT(lidp->lid_item, vecp);
|
|
vecp += lidp->lid_size; /* pointer arithmetic */
|
|
IOP_PIN(lidp->lid_item);
|
|
lidp = xfs_trans_next_item(tp, lidp);
|
|
}
|
|
|
|
/*
|
|
* Now that we've counted the number of items in this
|
|
* transaction, fill in the transaction header.
|
|
*/
|
|
tp->t_header.th_magic = XFS_TRANS_HEADER_MAGIC;
|
|
tp->t_header.th_type = tp->t_type;
|
|
tp->t_header.th_num_items = nitems;
|
|
log_vector->i_addr = (xfs_caddr_t)&tp->t_header;
|
|
log_vector->i_len = sizeof(xfs_trans_header_t);
|
|
XLOG_VEC_SET_TYPE(log_vector, XLOG_REG_TYPE_TRANSHDR);
|
|
}
|
|
|
|
|
|
/*
|
|
* Unlock all of the transaction's items and free the transaction.
|
|
* The transaction must not have modified any of its items, because
|
|
* there is no way to restore them to their previous state.
|
|
*
|
|
* If the transaction has made a log reservation, make sure to release
|
|
* it as well.
|
|
*/
|
|
void
|
|
xfs_trans_cancel(
|
|
xfs_trans_t *tp,
|
|
int flags)
|
|
{
|
|
int log_flags;
|
|
#ifdef DEBUG
|
|
xfs_log_item_chunk_t *licp;
|
|
xfs_log_item_desc_t *lidp;
|
|
xfs_log_item_t *lip;
|
|
int i;
|
|
#endif
|
|
xfs_mount_t *mp = tp->t_mountp;
|
|
|
|
/*
|
|
* See if the caller is being too lazy to figure out if
|
|
* the transaction really needs an abort.
|
|
*/
|
|
if ((flags & XFS_TRANS_ABORT) && !(tp->t_flags & XFS_TRANS_DIRTY))
|
|
flags &= ~XFS_TRANS_ABORT;
|
|
/*
|
|
* See if the caller is relying on us to shut down the
|
|
* filesystem. This happens in paths where we detect
|
|
* corruption and decide to give up.
|
|
*/
|
|
if ((tp->t_flags & XFS_TRANS_DIRTY) && !XFS_FORCED_SHUTDOWN(mp)) {
|
|
XFS_ERROR_REPORT("xfs_trans_cancel", XFS_ERRLEVEL_LOW, mp);
|
|
xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
|
|
}
|
|
#ifdef DEBUG
|
|
if (!(flags & XFS_TRANS_ABORT)) {
|
|
licp = &(tp->t_items);
|
|
while (licp != NULL) {
|
|
lidp = licp->lic_descs;
|
|
for (i = 0; i < licp->lic_unused; i++, lidp++) {
|
|
if (xfs_lic_isfree(licp, i)) {
|
|
continue;
|
|
}
|
|
|
|
lip = lidp->lid_item;
|
|
if (!XFS_FORCED_SHUTDOWN(mp))
|
|
ASSERT(!(lip->li_type == XFS_LI_EFD));
|
|
}
|
|
licp = licp->lic_next;
|
|
}
|
|
}
|
|
#endif
|
|
xfs_trans_unreserve_and_mod_sb(tp);
|
|
XFS_TRANS_UNRESERVE_AND_MOD_DQUOTS(mp, tp);
|
|
|
|
if (tp->t_ticket) {
|
|
if (flags & XFS_TRANS_RELEASE_LOG_RES) {
|
|
ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES);
|
|
log_flags = XFS_LOG_REL_PERM_RESERV;
|
|
} else {
|
|
log_flags = 0;
|
|
}
|
|
xfs_log_done(mp, tp->t_ticket, NULL, log_flags);
|
|
}
|
|
|
|
/* mark this thread as no longer being in a transaction */
|
|
current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS);
|
|
|
|
xfs_trans_free_items(tp, flags);
|
|
xfs_trans_free_busy(tp);
|
|
xfs_trans_free(tp);
|
|
}
|
|
|
|
|
|
/*
|
|
* Free the transaction structure. If there is more clean up
|
|
* to do when the structure is freed, add it here.
|
|
*/
|
|
STATIC void
|
|
xfs_trans_free(
|
|
xfs_trans_t *tp)
|
|
{
|
|
atomic_dec(&tp->t_mountp->m_active_trans);
|
|
XFS_TRANS_FREE_DQINFO(tp->t_mountp, tp);
|
|
kmem_zone_free(xfs_trans_zone, tp);
|
|
}
|
|
|
|
/*
|
|
* Roll from one trans in the sequence of PERMANENT transactions to
|
|
* the next: permanent transactions are only flushed out when
|
|
* committed with XFS_TRANS_RELEASE_LOG_RES, but we still want as soon
|
|
* as possible to let chunks of it go to the log. So we commit the
|
|
* chunk we've been working on and get a new transaction to continue.
|
|
*/
|
|
int
|
|
xfs_trans_roll(
|
|
struct xfs_trans **tpp,
|
|
struct xfs_inode *dp)
|
|
{
|
|
struct xfs_trans *trans;
|
|
unsigned int logres, count;
|
|
int error;
|
|
|
|
/*
|
|
* Ensure that the inode is always logged.
|
|
*/
|
|
trans = *tpp;
|
|
xfs_trans_log_inode(trans, dp, XFS_ILOG_CORE);
|
|
|
|
/*
|
|
* Copy the critical parameters from one trans to the next.
|
|
*/
|
|
logres = trans->t_log_res;
|
|
count = trans->t_log_count;
|
|
*tpp = xfs_trans_dup(trans);
|
|
|
|
/*
|
|
* Commit the current transaction.
|
|
* If this commit failed, then it'd just unlock those items that
|
|
* are not marked ihold. That also means that a filesystem shutdown
|
|
* is in progress. The caller takes the responsibility to cancel
|
|
* the duplicate transaction that gets returned.
|
|
*/
|
|
error = xfs_trans_commit(trans, 0);
|
|
if (error)
|
|
return (error);
|
|
|
|
trans = *tpp;
|
|
|
|
/*
|
|
* Reserve space in the log for th next transaction.
|
|
* This also pushes items in the "AIL", the list of logged items,
|
|
* out to disk if they are taking up space at the tail of the log
|
|
* that we want to use. This requires that either nothing be locked
|
|
* across this call, or that anything that is locked be logged in
|
|
* the prior and the next transactions.
|
|
*/
|
|
error = xfs_trans_reserve(trans, 0, logres, 0,
|
|
XFS_TRANS_PERM_LOG_RES, count);
|
|
/*
|
|
* Ensure that the inode is in the new transaction and locked.
|
|
*/
|
|
if (error)
|
|
return error;
|
|
|
|
xfs_trans_ijoin(trans, dp, XFS_ILOCK_EXCL);
|
|
xfs_trans_ihold(trans, dp);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* THIS SHOULD BE REWRITTEN TO USE xfs_trans_next_item().
|
|
*
|
|
* This is typically called by the LM when a transaction has been fully
|
|
* committed to disk. It needs to unpin the items which have
|
|
* been logged by the transaction and update their positions
|
|
* in the AIL if necessary.
|
|
* This also gets called when the transactions didn't get written out
|
|
* because of an I/O error. Abortflag & XFS_LI_ABORTED is set then.
|
|
*
|
|
* Call xfs_trans_chunk_committed() to process the items in
|
|
* each chunk.
|
|
*/
|
|
STATIC void
|
|
xfs_trans_committed(
|
|
xfs_trans_t *tp,
|
|
int abortflag)
|
|
{
|
|
xfs_log_item_chunk_t *licp;
|
|
xfs_log_item_chunk_t *next_licp;
|
|
xfs_log_busy_chunk_t *lbcp;
|
|
xfs_log_busy_slot_t *lbsp;
|
|
int i;
|
|
|
|
/*
|
|
* Call the transaction's completion callback if there
|
|
* is one.
|
|
*/
|
|
if (tp->t_callback != NULL) {
|
|
tp->t_callback(tp, tp->t_callarg);
|
|
}
|
|
|
|
/*
|
|
* Special case the chunk embedded in the transaction.
|
|
*/
|
|
licp = &(tp->t_items);
|
|
if (!(xfs_lic_are_all_free(licp))) {
|
|
xfs_trans_chunk_committed(licp, tp->t_lsn, abortflag);
|
|
}
|
|
|
|
/*
|
|
* Process the items in each chunk in turn.
|
|
*/
|
|
licp = licp->lic_next;
|
|
while (licp != NULL) {
|
|
ASSERT(!xfs_lic_are_all_free(licp));
|
|
xfs_trans_chunk_committed(licp, tp->t_lsn, abortflag);
|
|
next_licp = licp->lic_next;
|
|
kmem_free(licp);
|
|
licp = next_licp;
|
|
}
|
|
|
|
/*
|
|
* Clear all the per-AG busy list items listed in this transaction
|
|
*/
|
|
lbcp = &tp->t_busy;
|
|
while (lbcp != NULL) {
|
|
for (i = 0, lbsp = lbcp->lbc_busy; i < lbcp->lbc_unused; i++, lbsp++) {
|
|
if (!XFS_LBC_ISFREE(lbcp, i)) {
|
|
xfs_alloc_clear_busy(tp, lbsp->lbc_ag,
|
|
lbsp->lbc_idx);
|
|
}
|
|
}
|
|
lbcp = lbcp->lbc_next;
|
|
}
|
|
xfs_trans_free_busy(tp);
|
|
|
|
/*
|
|
* That's it for the transaction structure. Free it.
|
|
*/
|
|
xfs_trans_free(tp);
|
|
}
|
|
|
|
/*
|
|
* This is called to perform the commit processing for each
|
|
* item described by the given chunk.
|
|
*
|
|
* The commit processing consists of unlocking items which were
|
|
* held locked with the SYNC_UNLOCK attribute, calling the committed
|
|
* routine of each logged item, updating the item's position in the AIL
|
|
* if necessary, and unpinning each item. If the committed routine
|
|
* returns -1, then do nothing further with the item because it
|
|
* may have been freed.
|
|
*
|
|
* Since items are unlocked when they are copied to the incore
|
|
* log, it is possible for two transactions to be completing
|
|
* and manipulating the same item simultaneously. The AIL lock
|
|
* will protect the lsn field of each item. The value of this
|
|
* field can never go backwards.
|
|
*
|
|
* We unpin the items after repositioning them in the AIL, because
|
|
* otherwise they could be immediately flushed and we'd have to race
|
|
* with the flusher trying to pull the item from the AIL as we add it.
|
|
*/
|
|
STATIC void
|
|
xfs_trans_chunk_committed(
|
|
xfs_log_item_chunk_t *licp,
|
|
xfs_lsn_t lsn,
|
|
int aborted)
|
|
{
|
|
xfs_log_item_desc_t *lidp;
|
|
xfs_log_item_t *lip;
|
|
xfs_lsn_t item_lsn;
|
|
int i;
|
|
|
|
lidp = licp->lic_descs;
|
|
for (i = 0; i < licp->lic_unused; i++, lidp++) {
|
|
struct xfs_ail *ailp;
|
|
|
|
if (xfs_lic_isfree(licp, i)) {
|
|
continue;
|
|
}
|
|
|
|
lip = lidp->lid_item;
|
|
if (aborted)
|
|
lip->li_flags |= XFS_LI_ABORTED;
|
|
|
|
/*
|
|
* Send in the ABORTED flag to the COMMITTED routine
|
|
* so that it knows whether the transaction was aborted
|
|
* or not.
|
|
*/
|
|
item_lsn = IOP_COMMITTED(lip, lsn);
|
|
|
|
/*
|
|
* If the committed routine returns -1, make
|
|
* no more references to the item.
|
|
*/
|
|
if (XFS_LSN_CMP(item_lsn, (xfs_lsn_t)-1) == 0) {
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* If the returned lsn is greater than what it
|
|
* contained before, update the location of the
|
|
* item in the AIL. If it is not, then do nothing.
|
|
* Items can never move backwards in the AIL.
|
|
*
|
|
* While the new lsn should usually be greater, it
|
|
* is possible that a later transaction completing
|
|
* simultaneously with an earlier one using the
|
|
* same item could complete first with a higher lsn.
|
|
* This would cause the earlier transaction to fail
|
|
* the test below.
|
|
*/
|
|
ailp = lip->li_ailp;
|
|
spin_lock(&ailp->xa_lock);
|
|
if (XFS_LSN_CMP(item_lsn, lip->li_lsn) > 0) {
|
|
/*
|
|
* This will set the item's lsn to item_lsn
|
|
* and update the position of the item in
|
|
* the AIL.
|
|
*
|
|
* xfs_trans_ail_update() drops the AIL lock.
|
|
*/
|
|
xfs_trans_ail_update(ailp, lip, item_lsn);
|
|
} else {
|
|
spin_unlock(&ailp->xa_lock);
|
|
}
|
|
|
|
/*
|
|
* Now that we've repositioned the item in the AIL,
|
|
* unpin it so it can be flushed. Pass information
|
|
* about buffer stale state down from the log item
|
|
* flags, if anyone else stales the buffer we do not
|
|
* want to pay any attention to it.
|
|
*/
|
|
IOP_UNPIN(lip, lidp->lid_flags & XFS_LID_BUF_STALE);
|
|
}
|
|
}
|