2006-01-16 16:50:04 +00:00
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/*
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* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
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2006-05-18 19:09:15 +00:00
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* Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
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2006-01-16 16:50:04 +00:00
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*
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* This copyrighted material is made available to anyone wishing to use,
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* modify, copy, or redistribute it subject to the terms and conditions
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2006-09-01 15:05:15 +00:00
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* of the GNU General Public License version 2.
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2006-01-16 16:50:04 +00:00
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*/
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#include <linux/sched.h>
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#include <linux/slab.h>
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#include <linux/spinlock.h>
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#include <linux/completion.h>
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#include <linux/buffer_head.h>
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2006-02-27 22:23:27 +00:00
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#include <linux/gfs2_ondisk.h>
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2006-09-19 05:56:29 +00:00
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#include <linux/lm_interface.h>
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2006-01-16 16:50:04 +00:00
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#include "gfs2.h"
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2006-02-27 22:23:27 +00:00
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#include "incore.h"
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2006-01-16 16:50:04 +00:00
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#include "bmap.h"
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#include "glock.h"
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#include "glops.h"
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#include "inode.h"
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#include "log.h"
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#include "meta_io.h"
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#include "recovery.h"
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#include "rgrp.h"
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2006-02-27 22:23:27 +00:00
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#include "util.h"
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2006-10-03 15:10:41 +00:00
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#include "trans.h"
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2006-01-16 16:50:04 +00:00
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2006-10-03 15:10:41 +00:00
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/**
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* ail_empty_gl - remove all buffers for a given lock from the AIL
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* @gl: the glock
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*
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* None of the buffers should be dirty, locked, or pinned.
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*/
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static void gfs2_ail_empty_gl(struct gfs2_glock *gl)
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{
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struct gfs2_sbd *sdp = gl->gl_sbd;
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unsigned int blocks;
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struct list_head *head = &gl->gl_ail_list;
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struct gfs2_bufdata *bd;
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struct buffer_head *bh;
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u64 blkno;
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int error;
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blocks = atomic_read(&gl->gl_ail_count);
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if (!blocks)
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return;
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error = gfs2_trans_begin(sdp, 0, blocks);
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if (gfs2_assert_withdraw(sdp, !error))
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return;
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gfs2_log_lock(sdp);
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while (!list_empty(head)) {
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bd = list_entry(head->next, struct gfs2_bufdata,
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bd_ail_gl_list);
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bh = bd->bd_bh;
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blkno = bh->b_blocknr;
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gfs2_assert_withdraw(sdp, !buffer_busy(bh));
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bd->bd_ail = NULL;
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list_del(&bd->bd_ail_st_list);
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list_del(&bd->bd_ail_gl_list);
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atomic_dec(&gl->gl_ail_count);
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brelse(bh);
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gfs2_log_unlock(sdp);
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gfs2_trans_add_revoke(sdp, blkno);
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gfs2_log_lock(sdp);
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}
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gfs2_assert_withdraw(sdp, !atomic_read(&gl->gl_ail_count));
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gfs2_log_unlock(sdp);
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gfs2_trans_end(sdp);
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gfs2_log_flush(sdp, NULL);
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}
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2006-07-26 15:27:10 +00:00
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/**
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* gfs2_pte_inval - Sync and invalidate all PTEs associated with a glock
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* @gl: the glock
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*
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*/
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static void gfs2_pte_inval(struct gfs2_glock *gl)
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{
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struct gfs2_inode *ip;
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struct inode *inode;
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ip = gl->gl_object;
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inode = &ip->i_inode;
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2006-11-01 17:22:46 +00:00
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if (!ip || !S_ISREG(inode->i_mode))
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2006-07-26 15:27:10 +00:00
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return;
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if (!test_bit(GIF_PAGED, &ip->i_flags))
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return;
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unmap_shared_mapping_range(inode->i_mapping, 0, 0);
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if (test_bit(GIF_SW_PAGED, &ip->i_flags))
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set_bit(GLF_DIRTY, &gl->gl_flags);
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clear_bit(GIF_SW_PAGED, &ip->i_flags);
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}
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2006-01-16 16:50:04 +00:00
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/**
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* meta_go_sync - sync out the metadata for this glock
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* @gl: the glock
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*
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* Called when demoting or unlocking an EX glock. We must flush
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* to disk all dirty buffers/pages relating to this glock, and must not
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* not return to caller to demote/unlock the glock until I/O is complete.
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*/
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2006-11-20 15:37:45 +00:00
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static void meta_go_sync(struct gfs2_glock *gl)
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2006-01-16 16:50:04 +00:00
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{
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if (test_and_clear_bit(GLF_DIRTY, &gl->gl_flags)) {
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2006-04-07 15:17:32 +00:00
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gfs2_log_flush(gl->gl_sbd, gl);
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2006-09-21 21:05:23 +00:00
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gfs2_meta_sync(gl);
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2006-11-20 15:37:45 +00:00
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gfs2_ail_empty_gl(gl);
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2006-01-16 16:50:04 +00:00
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}
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}
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/**
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* meta_go_inval - invalidate the metadata for this glock
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* @gl: the glock
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* @flags:
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*
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*/
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static void meta_go_inval(struct gfs2_glock *gl, int flags)
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{
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if (!(flags & DIO_METADATA))
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return;
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gfs2_meta_inval(gl);
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gl->gl_vn++;
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}
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/**
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* inode_go_xmote_th - promote/demote a glock
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* @gl: the glock
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* @state: the requested state
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* @flags:
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*
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*/
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static void inode_go_xmote_th(struct gfs2_glock *gl, unsigned int state,
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int flags)
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{
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if (gl->gl_state != LM_ST_UNLOCKED)
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gfs2_pte_inval(gl);
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gfs2_glock_xmote_th(gl, state, flags);
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}
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/**
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* inode_go_xmote_bh - After promoting/demoting a glock
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* @gl: the glock
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*
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*/
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static void inode_go_xmote_bh(struct gfs2_glock *gl)
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{
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struct gfs2_holder *gh = gl->gl_req_gh;
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struct buffer_head *bh;
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int error;
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if (gl->gl_state != LM_ST_UNLOCKED &&
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(!gh || !(gh->gh_flags & GL_SKIP))) {
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2006-09-21 21:05:23 +00:00
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error = gfs2_meta_read(gl, gl->gl_name.ln_number, 0, &bh);
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2006-01-16 16:50:04 +00:00
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if (!error)
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brelse(bh);
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}
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}
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/**
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* inode_go_drop_th - unlock a glock
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* @gl: the glock
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*
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* Invoked from rq_demote().
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* Another node needs the lock in EXCLUSIVE mode, or lock (unused for too long)
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* is being purged from our node's glock cache; we're dropping lock.
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*/
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static void inode_go_drop_th(struct gfs2_glock *gl)
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{
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gfs2_pte_inval(gl);
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gfs2_glock_drop_th(gl);
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}
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/**
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* inode_go_sync - Sync the dirty data and/or metadata for an inode glock
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* @gl: the glock protecting the inode
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*
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*/
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2006-11-20 15:37:45 +00:00
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static void inode_go_sync(struct gfs2_glock *gl)
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2006-01-16 16:50:04 +00:00
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{
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2006-11-23 15:51:34 +00:00
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struct gfs2_inode *ip = gl->gl_object;
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if (ip && !S_ISREG(ip->i_inode.i_mode))
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ip = NULL;
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2006-01-16 16:50:04 +00:00
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if (test_bit(GLF_DIRTY, &gl->gl_flags)) {
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2006-11-20 15:37:45 +00:00
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gfs2_log_flush(gl->gl_sbd, gl);
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2006-11-23 15:51:34 +00:00
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if (ip)
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filemap_fdatawrite(ip->i_inode.i_mapping);
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2006-11-20 15:37:45 +00:00
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gfs2_meta_sync(gl);
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2006-11-23 15:51:34 +00:00
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if (ip) {
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struct address_space *mapping = ip->i_inode.i_mapping;
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int error = filemap_fdatawait(mapping);
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if (error == -ENOSPC)
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set_bit(AS_ENOSPC, &mapping->flags);
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else if (error)
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set_bit(AS_EIO, &mapping->flags);
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}
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2006-11-20 15:37:45 +00:00
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clear_bit(GLF_DIRTY, &gl->gl_flags);
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gfs2_ail_empty_gl(gl);
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2006-01-16 16:50:04 +00:00
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}
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}
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/**
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* inode_go_inval - prepare a inode glock to be released
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* @gl: the glock
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* @flags:
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*
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*/
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static void inode_go_inval(struct gfs2_glock *gl, int flags)
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{
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2006-11-23 15:51:34 +00:00
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struct gfs2_inode *ip = gl->gl_object;
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2006-01-16 16:50:04 +00:00
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int meta = (flags & DIO_METADATA);
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if (meta) {
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gfs2_meta_inval(gl);
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2006-11-23 15:51:34 +00:00
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if (ip)
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set_bit(GIF_INVALID, &ip->i_flags);
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}
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if (ip && S_ISREG(ip->i_inode.i_mode)) {
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truncate_inode_pages(ip->i_inode.i_mapping, 0);
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gfs2_assert_withdraw(GFS2_SB(&ip->i_inode), !ip->i_inode.i_mapping->nrpages);
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clear_bit(GIF_PAGED, &ip->i_flags);
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2006-01-16 16:50:04 +00:00
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}
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}
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/**
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* inode_go_demote_ok - Check to see if it's ok to unlock an inode glock
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* @gl: the glock
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*
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* Returns: 1 if it's ok
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*/
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static int inode_go_demote_ok(struct gfs2_glock *gl)
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{
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struct gfs2_sbd *sdp = gl->gl_sbd;
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int demote = 0;
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2006-02-27 22:23:27 +00:00
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if (!gl->gl_object && !gl->gl_aspace->i_mapping->nrpages)
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2006-01-16 16:50:04 +00:00
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demote = 1;
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else if (!sdp->sd_args.ar_localcaching &&
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time_after_eq(jiffies, gl->gl_stamp +
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gfs2_tune_get(sdp, gt_demote_secs) * HZ))
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demote = 1;
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return demote;
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}
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/**
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* inode_go_lock - operation done after an inode lock is locked by a process
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* @gl: the glock
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* @flags:
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*
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* Returns: errno
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*/
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static int inode_go_lock(struct gfs2_holder *gh)
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{
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struct gfs2_glock *gl = gh->gh_gl;
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2006-02-27 22:23:27 +00:00
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struct gfs2_inode *ip = gl->gl_object;
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2006-01-16 16:50:04 +00:00
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int error = 0;
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if (!ip)
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return 0;
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2006-11-01 21:05:38 +00:00
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if (test_bit(GIF_INVALID, &ip->i_flags)) {
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2006-01-16 16:50:04 +00:00
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error = gfs2_inode_refresh(ip);
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if (error)
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return error;
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}
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if ((ip->i_di.di_flags & GFS2_DIF_TRUNC_IN_PROG) &&
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(gl->gl_state == LM_ST_EXCLUSIVE) &&
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(gh->gh_flags & GL_LOCAL_EXCL))
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error = gfs2_truncatei_resume(ip);
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return error;
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}
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/**
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* inode_go_unlock - operation done before an inode lock is unlocked by a
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* process
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* @gl: the glock
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* @flags:
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*
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*/
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static void inode_go_unlock(struct gfs2_holder *gh)
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{
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struct gfs2_glock *gl = gh->gh_gl;
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2006-02-27 22:23:27 +00:00
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struct gfs2_inode *ip = gl->gl_object;
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2006-01-16 16:50:04 +00:00
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2006-11-08 20:45:46 +00:00
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if (ip)
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gfs2_meta_cache_flush(ip);
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2006-01-16 16:50:04 +00:00
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}
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/**
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* rgrp_go_demote_ok - Check to see if it's ok to unlock a RG's glock
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* @gl: the glock
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*
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* Returns: 1 if it's ok
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*/
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static int rgrp_go_demote_ok(struct gfs2_glock *gl)
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{
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return !gl->gl_aspace->i_mapping->nrpages;
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}
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/**
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* rgrp_go_lock - operation done after an rgrp lock is locked by
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* a first holder on this node.
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* @gl: the glock
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* @flags:
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*
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* Returns: errno
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*/
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static int rgrp_go_lock(struct gfs2_holder *gh)
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{
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2006-02-27 22:23:27 +00:00
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return gfs2_rgrp_bh_get(gh->gh_gl->gl_object);
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2006-01-16 16:50:04 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* rgrp_go_unlock - operation done before an rgrp lock is unlocked by
|
|
|
|
* a last holder on this node.
|
|
|
|
* @gl: the glock
|
|
|
|
* @flags:
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
|
|
|
static void rgrp_go_unlock(struct gfs2_holder *gh)
|
|
|
|
{
|
2006-02-27 22:23:27 +00:00
|
|
|
gfs2_rgrp_bh_put(gh->gh_gl->gl_object);
|
2006-01-16 16:50:04 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* trans_go_xmote_th - promote/demote the transaction glock
|
|
|
|
* @gl: the glock
|
|
|
|
* @state: the requested state
|
|
|
|
* @flags:
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
|
|
|
static void trans_go_xmote_th(struct gfs2_glock *gl, unsigned int state,
|
|
|
|
int flags)
|
|
|
|
{
|
|
|
|
struct gfs2_sbd *sdp = gl->gl_sbd;
|
|
|
|
|
|
|
|
if (gl->gl_state != LM_ST_UNLOCKED &&
|
|
|
|
test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) {
|
|
|
|
gfs2_meta_syncfs(sdp);
|
|
|
|
gfs2_log_shutdown(sdp);
|
|
|
|
}
|
|
|
|
|
|
|
|
gfs2_glock_xmote_th(gl, state, flags);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* trans_go_xmote_bh - After promoting/demoting the transaction glock
|
|
|
|
* @gl: the glock
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
|
|
|
static void trans_go_xmote_bh(struct gfs2_glock *gl)
|
|
|
|
{
|
|
|
|
struct gfs2_sbd *sdp = gl->gl_sbd;
|
2006-06-14 19:32:57 +00:00
|
|
|
struct gfs2_inode *ip = GFS2_I(sdp->sd_jdesc->jd_inode);
|
2006-02-27 22:23:27 +00:00
|
|
|
struct gfs2_glock *j_gl = ip->i_gl;
|
2006-10-14 01:47:13 +00:00
|
|
|
struct gfs2_log_header_host head;
|
2006-01-16 16:50:04 +00:00
|
|
|
int error;
|
|
|
|
|
|
|
|
if (gl->gl_state != LM_ST_UNLOCKED &&
|
|
|
|
test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) {
|
2006-06-14 19:32:57 +00:00
|
|
|
gfs2_meta_cache_flush(GFS2_I(sdp->sd_jdesc->jd_inode));
|
2006-11-20 15:37:45 +00:00
|
|
|
j_gl->gl_ops->go_inval(j_gl, DIO_METADATA);
|
2006-01-16 16:50:04 +00:00
|
|
|
|
|
|
|
error = gfs2_find_jhead(sdp->sd_jdesc, &head);
|
|
|
|
if (error)
|
|
|
|
gfs2_consist(sdp);
|
|
|
|
if (!(head.lh_flags & GFS2_LOG_HEAD_UNMOUNT))
|
|
|
|
gfs2_consist(sdp);
|
|
|
|
|
|
|
|
/* Initialize some head of the log stuff */
|
|
|
|
if (!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) {
|
|
|
|
sdp->sd_log_sequence = head.lh_sequence + 1;
|
|
|
|
gfs2_log_pointers_init(sdp, head.lh_blkno);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* trans_go_drop_th - unlock the transaction glock
|
|
|
|
* @gl: the glock
|
|
|
|
*
|
|
|
|
* We want to sync the device even with localcaching. Remember
|
|
|
|
* that localcaching journal replay only marks buffers dirty.
|
|
|
|
*/
|
|
|
|
|
|
|
|
static void trans_go_drop_th(struct gfs2_glock *gl)
|
|
|
|
{
|
|
|
|
struct gfs2_sbd *sdp = gl->gl_sbd;
|
|
|
|
|
|
|
|
if (test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) {
|
|
|
|
gfs2_meta_syncfs(sdp);
|
|
|
|
gfs2_log_shutdown(sdp);
|
|
|
|
}
|
|
|
|
|
|
|
|
gfs2_glock_drop_th(gl);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* quota_go_demote_ok - Check to see if it's ok to unlock a quota glock
|
|
|
|
* @gl: the glock
|
|
|
|
*
|
|
|
|
* Returns: 1 if it's ok
|
|
|
|
*/
|
|
|
|
|
|
|
|
static int quota_go_demote_ok(struct gfs2_glock *gl)
|
|
|
|
{
|
|
|
|
return !atomic_read(&gl->gl_lvb_count);
|
|
|
|
}
|
|
|
|
|
2006-08-30 13:30:00 +00:00
|
|
|
const struct gfs2_glock_operations gfs2_meta_glops = {
|
2006-01-16 16:50:04 +00:00
|
|
|
.go_xmote_th = gfs2_glock_xmote_th,
|
|
|
|
.go_drop_th = gfs2_glock_drop_th,
|
2006-09-05 14:53:09 +00:00
|
|
|
.go_type = LM_TYPE_META,
|
2006-01-16 16:50:04 +00:00
|
|
|
};
|
|
|
|
|
2006-08-30 13:30:00 +00:00
|
|
|
const struct gfs2_glock_operations gfs2_inode_glops = {
|
2006-01-16 16:50:04 +00:00
|
|
|
.go_xmote_th = inode_go_xmote_th,
|
|
|
|
.go_xmote_bh = inode_go_xmote_bh,
|
|
|
|
.go_drop_th = inode_go_drop_th,
|
|
|
|
.go_sync = inode_go_sync,
|
|
|
|
.go_inval = inode_go_inval,
|
|
|
|
.go_demote_ok = inode_go_demote_ok,
|
|
|
|
.go_lock = inode_go_lock,
|
|
|
|
.go_unlock = inode_go_unlock,
|
2006-09-05 14:53:09 +00:00
|
|
|
.go_type = LM_TYPE_INODE,
|
2006-01-16 16:50:04 +00:00
|
|
|
};
|
|
|
|
|
2006-08-30 13:30:00 +00:00
|
|
|
const struct gfs2_glock_operations gfs2_rgrp_glops = {
|
2006-01-16 16:50:04 +00:00
|
|
|
.go_xmote_th = gfs2_glock_xmote_th,
|
|
|
|
.go_drop_th = gfs2_glock_drop_th,
|
|
|
|
.go_sync = meta_go_sync,
|
|
|
|
.go_inval = meta_go_inval,
|
|
|
|
.go_demote_ok = rgrp_go_demote_ok,
|
|
|
|
.go_lock = rgrp_go_lock,
|
|
|
|
.go_unlock = rgrp_go_unlock,
|
2006-09-05 14:53:09 +00:00
|
|
|
.go_type = LM_TYPE_RGRP,
|
2006-01-16 16:50:04 +00:00
|
|
|
};
|
|
|
|
|
2006-08-30 13:30:00 +00:00
|
|
|
const struct gfs2_glock_operations gfs2_trans_glops = {
|
2006-01-16 16:50:04 +00:00
|
|
|
.go_xmote_th = trans_go_xmote_th,
|
|
|
|
.go_xmote_bh = trans_go_xmote_bh,
|
|
|
|
.go_drop_th = trans_go_drop_th,
|
2006-09-05 14:53:09 +00:00
|
|
|
.go_type = LM_TYPE_NONDISK,
|
2006-01-16 16:50:04 +00:00
|
|
|
};
|
|
|
|
|
2006-08-30 13:30:00 +00:00
|
|
|
const struct gfs2_glock_operations gfs2_iopen_glops = {
|
2006-01-16 16:50:04 +00:00
|
|
|
.go_xmote_th = gfs2_glock_xmote_th,
|
|
|
|
.go_drop_th = gfs2_glock_drop_th,
|
2006-09-05 14:53:09 +00:00
|
|
|
.go_type = LM_TYPE_IOPEN,
|
2006-01-16 16:50:04 +00:00
|
|
|
};
|
|
|
|
|
2006-08-30 13:30:00 +00:00
|
|
|
const struct gfs2_glock_operations gfs2_flock_glops = {
|
2006-01-16 16:50:04 +00:00
|
|
|
.go_xmote_th = gfs2_glock_xmote_th,
|
|
|
|
.go_drop_th = gfs2_glock_drop_th,
|
2006-09-05 14:53:09 +00:00
|
|
|
.go_type = LM_TYPE_FLOCK,
|
2006-01-16 16:50:04 +00:00
|
|
|
};
|
|
|
|
|
2006-08-30 13:30:00 +00:00
|
|
|
const struct gfs2_glock_operations gfs2_nondisk_glops = {
|
2006-01-16 16:50:04 +00:00
|
|
|
.go_xmote_th = gfs2_glock_xmote_th,
|
|
|
|
.go_drop_th = gfs2_glock_drop_th,
|
2006-09-05 14:53:09 +00:00
|
|
|
.go_type = LM_TYPE_NONDISK,
|
2006-01-16 16:50:04 +00:00
|
|
|
};
|
|
|
|
|
2006-08-30 13:30:00 +00:00
|
|
|
const struct gfs2_glock_operations gfs2_quota_glops = {
|
2006-01-16 16:50:04 +00:00
|
|
|
.go_xmote_th = gfs2_glock_xmote_th,
|
|
|
|
.go_drop_th = gfs2_glock_drop_th,
|
|
|
|
.go_demote_ok = quota_go_demote_ok,
|
2006-09-05 14:53:09 +00:00
|
|
|
.go_type = LM_TYPE_QUOTA,
|
2006-01-16 16:50:04 +00:00
|
|
|
};
|
|
|
|
|
2006-08-30 13:30:00 +00:00
|
|
|
const struct gfs2_glock_operations gfs2_journal_glops = {
|
2006-01-16 16:50:04 +00:00
|
|
|
.go_xmote_th = gfs2_glock_xmote_th,
|
|
|
|
.go_drop_th = gfs2_glock_drop_th,
|
2006-09-05 14:53:09 +00:00
|
|
|
.go_type = LM_TYPE_JOURNAL,
|
2006-01-16 16:50:04 +00:00
|
|
|
};
|
|
|
|
|