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authorSteven Whitehouse <swhiteho@redhat.com>2009-11-06 11:10:51 +0000
committerSteven Whitehouse <swhiteho@redhat.com>2009-12-03 11:57:41 +0000
commit2c77634965ee28c8b4790ffb5e83dd5ff7ac8988 (patch)
treed8b32167ae8cdeca4be7977ee416359f9c9f5543 /fs/gfs2
parent1579343a73e32b5886e186e8f3e4db85e420ed3f (diff)
GFS2: Locking order fix in gfs2_check_blk_state
In some cases we already have the rindex lock when we enter this function. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Diffstat (limited to 'fs/gfs2')
-rw-r--r--fs/gfs2/rgrp.c14
1 files changed, 10 insertions, 4 deletions
diff --git a/fs/gfs2/rgrp.c b/fs/gfs2/rgrp.c
index 8f1cfb02a6c..0608f490c29 100644
--- a/fs/gfs2/rgrp.c
+++ b/fs/gfs2/rgrp.c
@@ -1710,11 +1710,16 @@ int gfs2_check_blk_type(struct gfs2_sbd *sdp, u64 no_addr, unsigned int type)
{
struct gfs2_rgrpd *rgd;
struct gfs2_holder ri_gh, rgd_gh;
+ struct gfs2_inode *ip = GFS2_I(sdp->sd_rindex);
+ int ri_locked = 0;
int error;
- error = gfs2_rindex_hold(sdp, &ri_gh);
- if (error)
- goto fail;
+ if (!gfs2_glock_is_locked_by_me(ip->i_gl)) {
+ error = gfs2_rindex_hold(sdp, &ri_gh);
+ if (error)
+ goto fail;
+ ri_locked = 1;
+ }
error = -EINVAL;
rgd = gfs2_blk2rgrpd(sdp, no_addr);
@@ -1730,7 +1735,8 @@ int gfs2_check_blk_type(struct gfs2_sbd *sdp, u64 no_addr, unsigned int type)
gfs2_glock_dq_uninit(&rgd_gh);
fail_rindex:
- gfs2_glock_dq_uninit(&ri_gh);
+ if (ri_locked)
+ gfs2_glock_dq_uninit(&ri_gh);
fail:
return error;
}