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| author | Steven Whitehouse <swhiteho@redhat.com> | 2009-11-06 11:10:51 +0000 |
|---|---|---|
| committer | Steven Whitehouse <swhiteho@redhat.com> | 2009-12-03 11:57:41 +0000 |
| commit | 2c77634965ee28c8b4790ffb5e83dd5ff7ac8988 (patch) | |
| tree | d8b32167ae8cdeca4be7977ee416359f9c9f5543 | |
| parent | 1579343a73e32b5886e186e8f3e4db85e420ed3f (diff) | |
| download | linux-3.10-2c77634965ee28c8b4790ffb5e83dd5ff7ac8988.tar.gz linux-3.10-2c77634965ee28c8b4790ffb5e83dd5ff7ac8988.tar.bz2 linux-3.10-2c77634965ee28c8b4790ffb5e83dd5ff7ac8988.zip | |
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>
| -rw-r--r-- | fs/gfs2/rgrp.c | 14 |
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; } |