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GFS2 fatal: filesystem consistency error on rename

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This patch fixes a GFS2 problem whereby the first rename after a
mount can result in a file system consistency error being flagged
improperly and cause the file system to withdraw.  The problem is
that the rename code tries to run the rgrp list with function
gfs2_blk2rgrpd before the rgrp list is guaranteed to be read in
from disk.  The patch makes the rename function hold the rindex
glock (as the gfs2_unlink code does today) which reads in the rgrp
list if need be.  There were a total of three places in the rename
code that improperly referenced the rgrp list without the rindex
glock and this patch fixes all three.

Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
This commit is contained in:
Bob Peterson 2010-09-30 10:34:00 -04:00 committed by Steven Whitehouse
parent feb47ca931
commit 46290341cd
3 changed files with 24 additions and 14 deletions
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8
fs/gfs2/ops_inode.c
View file

@ -736,7 +736,7 @@ static int gfs2_rename(struct inode *odir, struct dentry *odentry,
struct gfs2_inode *ip = GFS2_I(odentry->d_inode);
struct gfs2_inode *nip = NULL;
struct gfs2_sbd *sdp = GFS2_SB(odir);
struct gfs2_holder ghs[5], r_gh = { .gh_gl = NULL, };
struct gfs2_holder ghs[5], r_gh = { .gh_gl = NULL, }, ri_gh;
struct gfs2_rgrpd *nrgd;
unsigned int num_gh;
int dir_rename = 0;
@ -750,6 +750,9 @@ static int gfs2_rename(struct inode *odir, struct dentry *odentry,
return 0;
}
error = gfs2_rindex_hold(sdp, &ri_gh);
if (error)
return error;
if (odip != ndip) {
error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE,
@ -879,7 +882,7 @@ static int gfs2_rename(struct inode *odir, struct dentry *odentry,
al->al_requested = sdp->sd_max_dirres;
error = gfs2_inplace_reserve(ndip);
error = gfs2_inplace_reserve_ri(ndip);
if (error)
goto out_gunlock_q;
@ -961,6 +964,7 @@ static int gfs2_rename(struct inode *odir, struct dentry *odentry,
if (r_gh.gh_gl)
gfs2_glock_dq_uninit(&r_gh);
out:
gfs2_glock_dq_uninit(&ri_gh);
return error;
}

22
fs/gfs2/rgrp.c
View file

@ -1200,7 +1200,8 @@ static int get_local_rgrp(struct gfs2_inode *ip, u64 *unlinked,
* Returns: errno
*/
int gfs2_inplace_reserve_i(struct gfs2_inode *ip, char *file, unsigned int line)
int gfs2_inplace_reserve_i(struct gfs2_inode *ip, int hold_rindex,
char *file, unsigned int line)
{
struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
struct gfs2_alloc *al = ip->i_alloc;
@ -1211,12 +1212,15 @@ int gfs2_inplace_reserve_i(struct gfs2_inode *ip, char *file, unsigned int line)
return -EINVAL;
try_again:
/* We need to hold the rindex unless the inode we're using is
the rindex itself, in which case it's already held. */
if (ip != GFS2_I(sdp->sd_rindex))
error = gfs2_rindex_hold(sdp, &al->al_ri_gh);
else if (!sdp->sd_rgrps) /* We may not have the rindex read in, so: */
error = gfs2_ri_update_special(ip);
if (hold_rindex) {
/* We need to hold the rindex unless the inode we're using is
the rindex itself, in which case it's already held. */
if (ip != GFS2_I(sdp->sd_rindex))
error = gfs2_rindex_hold(sdp, &al->al_ri_gh);
else if (!sdp->sd_rgrps) /* We may not have the rindex read
in, so: */
error = gfs2_ri_update_special(ip);
}
if (error)
return error;
@ -1227,7 +1231,7 @@ int gfs2_inplace_reserve_i(struct gfs2_inode *ip, char *file, unsigned int line)
try to free it, and try the allocation again. */
error = get_local_rgrp(ip, &unlinked, &last_unlinked);
if (error) {
if (ip != GFS2_I(sdp->sd_rindex))
if (hold_rindex && ip != GFS2_I(sdp->sd_rindex))
gfs2_glock_dq_uninit(&al->al_ri_gh);
if (error != -EAGAIN)
return error;
@ -1269,7 +1273,7 @@ void gfs2_inplace_release(struct gfs2_inode *ip)
al->al_rgd = NULL;
if (al->al_rgd_gh.gh_gl)
gfs2_glock_dq_uninit(&al->al_rgd_gh);
if (ip != GFS2_I(sdp->sd_rindex))
if (ip != GFS2_I(sdp->sd_rindex) && al->al_ri_gh.gh_gl)
gfs2_glock_dq_uninit(&al->al_ri_gh);
}

8
fs/gfs2/rgrp.h
View file

@ -39,10 +39,12 @@ static inline void gfs2_alloc_put(struct gfs2_inode *ip)
ip->i_alloc = NULL;
}
extern int gfs2_inplace_reserve_i(struct gfs2_inode *ip, char *file,
unsigned int line);
extern int gfs2_inplace_reserve_i(struct gfs2_inode *ip, int hold_rindex,
char *file, unsigned int line);
#define gfs2_inplace_reserve(ip) \
gfs2_inplace_reserve_i((ip), __FILE__, __LINE__)
gfs2_inplace_reserve_i((ip), 1, __FILE__, __LINE__)
#define gfs2_inplace_reserve_ri(ip) \
gfs2_inplace_reserve_i((ip), 0, __FILE__, __LINE__)
extern void gfs2_inplace_release(struct gfs2_inode *ip);