2006-01-16 17:50:04 +01:00
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/*
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* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
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2008-01-31 17:31:39 +01:00
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* Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved.
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2006-01-16 17:50:04 +01:00
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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 17:05:15 +02:00
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* of the GNU General Public License version 2.
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2006-01-16 17:50:04 +01:00
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*/
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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 23:23:27 +01:00
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#include <linux/gfs2_ondisk.h>
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2008-05-21 18:03:22 +02:00
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#include <linux/bio.h>
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2006-01-16 17:50:04 +01:00
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#include "gfs2.h"
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2006-02-27 23:23:27 +01:00
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#include "incore.h"
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2006-01-16 17:50:04 +01:00
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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 23:23:27 +01:00
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#include "util.h"
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2006-10-03 17:10:41 +02:00
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#include "trans.h"
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2006-01-16 17:50:04 +01:00
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2006-10-03 17:10:41 +02:00
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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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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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2007-10-15 17:29:05 +02:00
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gfs2_remove_from_ail(bd);
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2007-09-03 12:01:33 +02:00
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bd->bd_bh = NULL;
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bh->b_private = NULL;
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bd->bd_blkno = bh->b_blocknr;
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gfs2_assert_withdraw(sdp, !buffer_busy(bh));
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gfs2_trans_add_revoke(sdp, bd);
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2006-10-03 17:10:41 +02:00
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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 17:27:10 +02:00
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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 18:22:46 +01:00
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if (!ip || !S_ISREG(inode->i_mode))
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2006-07-26 17:27:10 +02:00
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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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}
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2006-01-16 17:50:04 +01:00
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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 16:37:45 +01:00
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static void meta_go_sync(struct gfs2_glock *gl)
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2006-01-16 17:50:04 +01:00
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{
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2007-01-22 18:15:34 +01:00
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if (gl->gl_state != LM_ST_EXCLUSIVE)
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return;
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2006-01-16 17:50:04 +01:00
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if (test_and_clear_bit(GLF_DIRTY, &gl->gl_flags)) {
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2006-04-07 17:17:32 +02:00
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gfs2_log_flush(gl->gl_sbd, gl);
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2006-09-21 23:05:23 +02:00
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gfs2_meta_sync(gl);
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2006-11-20 16:37:45 +01:00
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gfs2_ail_empty_gl(gl);
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2006-01-16 17:50:04 +01:00
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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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2008-01-31 17:31:39 +01:00
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if (gl->gl_object == GFS2_I(gl->gl_sbd->sd_rindex))
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gl->gl_sbd->sd_rindex_uptodate = 0;
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else if (gl->gl_ops == &gfs2_rgrp_glops && gl->gl_object) {
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struct gfs2_rgrpd *rgd = (struct gfs2_rgrpd *)gl->gl_object;
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rgd->rd_flags &= ~GFS2_RDF_UPTODATE;
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}
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2006-01-16 17:50:04 +01:00
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}
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2007-01-22 18:15:34 +01:00
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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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static void inode_go_sync(struct gfs2_glock *gl)
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{
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struct gfs2_inode *ip = gl->gl_object;
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2007-11-02 09:39:34 +01:00
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struct address_space *metamapping = gl->gl_aspace->i_mapping;
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int error;
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if (gl->gl_state != LM_ST_UNLOCKED)
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gfs2_pte_inval(gl);
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if (gl->gl_state != LM_ST_EXCLUSIVE)
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return;
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2007-01-22 18:15:34 +01:00
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if (ip && !S_ISREG(ip->i_inode.i_mode))
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ip = NULL;
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if (test_bit(GLF_DIRTY, &gl->gl_flags)) {
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[GFS2] flush the glock completely in inode_go_sync
Fix for bz #231910
When filemap_fdatawrite() is called on the inode mapping in data=ordered mode,
it will add the glock to the log. In inode_go_sync(), if you do the
gfs2_log_flush() before this, after the filemap_fdatawrite() call, the glock
and its associated data buffers will be on the log again. This means you can
demote a lock from exclusive, without having it flushed from the log. The
attached patch simply moves the gfs2_log_flush up to after the
filemap_fdatawrite() call.
Originally, I tried moving the gfs2_log_flush to after gfs2_meta_sync(), but
that caused me to trip the following assert.
GFS2: fsid=cypher-36:test.0: fatal: assertion "!buffer_busy(bh)" failed
GFS2: fsid=cypher-36:test.0: function = gfs2_ail_empty_gl, file = fs/gfs2/glops.c, line = 61
It appears that gfs2_log_flush() puts some of the glocks buffers in the busy
state and the filemap_fdatawrite() call is necessary to flush them. This makes
me worry slightly that a related problem could happen because of moving the
gfs2_log_flush() after the initial filemap_fdatawrite(), but I assume that
gfs2_ail_empty_gl() would catch that case as well.
Signed-off-by: Benjamin E. Marzinski <bmarzins@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2007-05-02 16:44:03 +02:00
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gfs2_log_flush(gl->gl_sbd, gl);
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2007-11-02 09:39:34 +01:00
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filemap_fdatawrite(metamapping);
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2007-01-22 18:15:34 +01:00
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if (ip) {
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struct address_space *mapping = ip->i_inode.i_mapping;
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2007-11-02 09:39:34 +01:00
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filemap_fdatawrite(mapping);
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error = filemap_fdatawait(mapping);
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2007-05-08 09:23:25 +02:00
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mapping_set_error(mapping, error);
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2007-01-22 18:15:34 +01:00
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}
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2007-11-02 09:39:34 +01:00
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error = filemap_fdatawait(metamapping);
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mapping_set_error(metamapping, error);
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2007-01-22 18:15:34 +01:00
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clear_bit(GLF_DIRTY, &gl->gl_flags);
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gfs2_ail_empty_gl(gl);
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}
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}
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2006-01-16 17:50:04 +01:00
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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 16:51:34 +01:00
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struct gfs2_inode *ip = gl->gl_object;
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2006-01-16 17:50:04 +01:00
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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 16:51:34 +01:00
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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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2007-10-15 16:40:33 +02:00
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if (ip && S_ISREG(ip->i_inode.i_mode))
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2006-11-23 16:51:34 +01:00
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truncate_inode_pages(ip->i_inode.i_mapping, 0);
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2006-01-16 17:50:04 +01:00
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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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2008-11-20 14:39:47 +01:00
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static int inode_go_demote_ok(const struct gfs2_glock *gl)
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2006-01-16 17:50:04 +01:00
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{
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struct gfs2_sbd *sdp = gl->gl_sbd;
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2008-11-20 14:39:47 +01:00
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if (sdp->sd_jindex == gl->gl_object || sdp->sd_rindex == gl->gl_object)
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return 0;
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return 1;
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2006-01-16 17:50:04 +01:00
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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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2008-11-18 14:38:48 +01:00
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struct gfs2_sbd *sdp = gl->gl_sbd;
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2006-02-27 23:23:27 +01:00
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struct gfs2_inode *ip = gl->gl_object;
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2006-01-16 17:50:04 +01:00
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int error = 0;
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2008-04-29 19:35:48 +02:00
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if (!ip || (gh->gh_flags & GL_SKIP))
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2006-01-16 17:50:04 +01:00
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return 0;
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2006-11-01 22:05:38 +01:00
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if (test_bit(GIF_INVALID, &ip->i_flags)) {
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2006-01-16 17:50:04 +01:00
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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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2008-11-04 11:05:22 +01:00
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if ((ip->i_diskflags & GFS2_DIF_TRUNC_IN_PROG) &&
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2006-01-16 17:50:04 +01:00
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(gl->gl_state == LM_ST_EXCLUSIVE) &&
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2008-11-18 14:38:48 +01:00
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(gh->gh_state == LM_ST_EXCLUSIVE)) {
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spin_lock(&sdp->sd_trunc_lock);
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if (list_empty(&ip->i_trunc_list))
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list_add(&sdp->sd_trunc_list, &ip->i_trunc_list);
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spin_unlock(&sdp->sd_trunc_lock);
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wake_up(&sdp->sd_quota_wait);
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return 1;
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}
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2006-01-16 17:50:04 +01:00
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return error;
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}
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2008-05-21 18:03:22 +02:00
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/**
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* inode_go_dump - print information about an inode
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* @seq: The iterator
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* @ip: the inode
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*
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* Returns: 0 on success, -ENOBUFS when we run out of space
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*/
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static int inode_go_dump(struct seq_file *seq, const struct gfs2_glock *gl)
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{
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const struct gfs2_inode *ip = gl->gl_object;
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if (ip == NULL)
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return 0;
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2008-11-10 11:10:12 +01:00
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gfs2_print_dbg(seq, " I: n:%llu/%llu t:%u f:0x%02lx d:0x%08x s:%llu/%llu\n",
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2008-05-21 18:03:22 +02:00
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(unsigned long long)ip->i_no_formal_ino,
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(unsigned long long)ip->i_no_addr,
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2008-11-10 11:10:12 +01:00
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IF2DT(ip->i_inode.i_mode), ip->i_flags,
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(unsigned int)ip->i_diskflags,
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(unsigned long long)ip->i_inode.i_size,
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(unsigned long long)ip->i_disksize);
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2008-05-21 18:03:22 +02:00
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return 0;
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}
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2006-01-16 17:50:04 +01:00
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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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2008-11-20 14:39:47 +01:00
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static int rgrp_go_demote_ok(const struct gfs2_glock *gl)
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2006-01-16 17:50:04 +01:00
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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 23:23:27 +01:00
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return gfs2_rgrp_bh_get(gh->gh_gl->gl_object);
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2006-01-16 17:50:04 +01:00
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}
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/**
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* 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 23:23:27 +01:00
|
|
|
gfs2_rgrp_bh_put(gh->gh_gl->gl_object);
|
2006-01-16 17:50:04 +01:00
|
|
|
}
|
|
|
|
|
2008-05-21 18:03:22 +02:00
|
|
|
/**
|
|
|
|
* rgrp_go_dump - print out an rgrp
|
|
|
|
* @seq: The iterator
|
|
|
|
* @gl: The glock in question
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
|
|
|
static int rgrp_go_dump(struct seq_file *seq, const struct gfs2_glock *gl)
|
|
|
|
{
|
|
|
|
const struct gfs2_rgrpd *rgd = gl->gl_object;
|
|
|
|
if (rgd == NULL)
|
|
|
|
return 0;
|
2008-11-10 11:10:12 +01:00
|
|
|
gfs2_print_dbg(seq, " R: n:%llu f:%02x b:%u/%u i:%u\n",
|
|
|
|
(unsigned long long)rgd->rd_addr, rgd->rd_flags,
|
|
|
|
rgd->rd_free, rgd->rd_free_clone, rgd->rd_dinodes);
|
2008-05-21 18:03:22 +02:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2006-01-16 17:50:04 +01:00
|
|
|
/**
|
2007-11-02 09:39:34 +01:00
|
|
|
* trans_go_sync - promote/demote the transaction glock
|
2006-01-16 17:50:04 +01:00
|
|
|
* @gl: the glock
|
|
|
|
* @state: the requested state
|
|
|
|
* @flags:
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
2007-11-02 09:39:34 +01:00
|
|
|
static void trans_go_sync(struct gfs2_glock *gl)
|
2006-01-16 17:50:04 +01:00
|
|
|
{
|
|
|
|
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);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* trans_go_xmote_bh - After promoting/demoting the transaction glock
|
|
|
|
* @gl: the glock
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
2008-05-21 18:03:22 +02:00
|
|
|
static int trans_go_xmote_bh(struct gfs2_glock *gl, struct gfs2_holder *gh)
|
2006-01-16 17:50:04 +01:00
|
|
|
{
|
|
|
|
struct gfs2_sbd *sdp = gl->gl_sbd;
|
2006-06-14 21:32:57 +02:00
|
|
|
struct gfs2_inode *ip = GFS2_I(sdp->sd_jdesc->jd_inode);
|
2006-02-27 23:23:27 +01:00
|
|
|
struct gfs2_glock *j_gl = ip->i_gl;
|
2006-10-14 03:47:13 +02:00
|
|
|
struct gfs2_log_header_host head;
|
2006-01-16 17:50:04 +01:00
|
|
|
int error;
|
|
|
|
|
2008-05-21 18:03:22 +02:00
|
|
|
if (test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) {
|
2006-11-20 16:37:45 +01:00
|
|
|
j_gl->gl_ops->go_inval(j_gl, DIO_METADATA);
|
2006-01-16 17:50:04 +01:00
|
|
|
|
|
|
|
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);
|
|
|
|
}
|
|
|
|
}
|
2008-05-21 18:03:22 +02:00
|
|
|
return 0;
|
2006-01-16 17:50:04 +01:00
|
|
|
}
|
|
|
|
|
2008-11-20 14:39:47 +01:00
|
|
|
/**
|
|
|
|
* trans_go_demote_ok
|
|
|
|
* @gl: the glock
|
|
|
|
*
|
|
|
|
* Always returns 0
|
|
|
|
*/
|
|
|
|
|
|
|
|
static int trans_go_demote_ok(const struct gfs2_glock *gl)
|
|
|
|
{
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2006-08-30 15:30:00 +02:00
|
|
|
const struct gfs2_glock_operations gfs2_meta_glops = {
|
2007-01-22 18:15:34 +01:00
|
|
|
.go_xmote_th = meta_go_sync,
|
2006-09-05 16:53:09 +02:00
|
|
|
.go_type = LM_TYPE_META,
|
2006-01-16 17:50:04 +01:00
|
|
|
};
|
|
|
|
|
2006-08-30 15:30:00 +02:00
|
|
|
const struct gfs2_glock_operations gfs2_inode_glops = {
|
2007-11-02 09:39:34 +01:00
|
|
|
.go_xmote_th = inode_go_sync,
|
2006-01-16 17:50:04 +01:00
|
|
|
.go_inval = inode_go_inval,
|
|
|
|
.go_demote_ok = inode_go_demote_ok,
|
|
|
|
.go_lock = inode_go_lock,
|
2008-05-21 18:03:22 +02:00
|
|
|
.go_dump = inode_go_dump,
|
2006-09-05 16:53:09 +02:00
|
|
|
.go_type = LM_TYPE_INODE,
|
2008-05-21 18:03:22 +02:00
|
|
|
.go_min_hold_time = HZ / 5,
|
2006-01-16 17:50:04 +01:00
|
|
|
};
|
|
|
|
|
2006-08-30 15:30:00 +02:00
|
|
|
const struct gfs2_glock_operations gfs2_rgrp_glops = {
|
2007-02-28 15:03:00 +01:00
|
|
|
.go_xmote_th = meta_go_sync,
|
2006-01-16 17:50:04 +01:00
|
|
|
.go_inval = meta_go_inval,
|
|
|
|
.go_demote_ok = rgrp_go_demote_ok,
|
|
|
|
.go_lock = rgrp_go_lock,
|
|
|
|
.go_unlock = rgrp_go_unlock,
|
2008-05-21 18:03:22 +02:00
|
|
|
.go_dump = rgrp_go_dump,
|
2006-09-05 16:53:09 +02:00
|
|
|
.go_type = LM_TYPE_RGRP,
|
2008-05-21 18:03:22 +02:00
|
|
|
.go_min_hold_time = HZ / 5,
|
2006-01-16 17:50:04 +01:00
|
|
|
};
|
|
|
|
|
2006-08-30 15:30:00 +02:00
|
|
|
const struct gfs2_glock_operations gfs2_trans_glops = {
|
2007-11-02 09:39:34 +01:00
|
|
|
.go_xmote_th = trans_go_sync,
|
2006-01-16 17:50:04 +01:00
|
|
|
.go_xmote_bh = trans_go_xmote_bh,
|
2008-11-20 14:39:47 +01:00
|
|
|
.go_demote_ok = trans_go_demote_ok,
|
2006-09-05 16:53:09 +02:00
|
|
|
.go_type = LM_TYPE_NONDISK,
|
2006-01-16 17:50:04 +01:00
|
|
|
};
|
|
|
|
|
2006-08-30 15:30:00 +02:00
|
|
|
const struct gfs2_glock_operations gfs2_iopen_glops = {
|
2006-09-05 16:53:09 +02:00
|
|
|
.go_type = LM_TYPE_IOPEN,
|
2006-01-16 17:50:04 +01:00
|
|
|
};
|
|
|
|
|
2006-08-30 15:30:00 +02:00
|
|
|
const struct gfs2_glock_operations gfs2_flock_glops = {
|
2006-09-05 16:53:09 +02:00
|
|
|
.go_type = LM_TYPE_FLOCK,
|
2006-01-16 17:50:04 +01:00
|
|
|
};
|
|
|
|
|
2006-08-30 15:30:00 +02:00
|
|
|
const struct gfs2_glock_operations gfs2_nondisk_glops = {
|
2006-09-05 16:53:09 +02:00
|
|
|
.go_type = LM_TYPE_NONDISK,
|
2006-01-16 17:50:04 +01:00
|
|
|
};
|
|
|
|
|
2006-08-30 15:30:00 +02:00
|
|
|
const struct gfs2_glock_operations gfs2_quota_glops = {
|
2006-09-05 16:53:09 +02:00
|
|
|
.go_type = LM_TYPE_QUOTA,
|
2006-01-16 17:50:04 +01:00
|
|
|
};
|
|
|
|
|
2006-08-30 15:30:00 +02:00
|
|
|
const struct gfs2_glock_operations gfs2_journal_glops = {
|
2006-09-05 16:53:09 +02:00
|
|
|
.go_type = LM_TYPE_JOURNAL,
|
2006-01-16 17:50:04 +01:00
|
|
|
};
|
|
|
|
|