luck/tmp_suning_uos_patched
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ceph: don't improperly set dir complete when holding EXCL cap

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If we hold the EXCL cap, we cannot trust the dir stats from the MDS (num
files, subdirs) and must not incorrectly conclude that the directory is
empty.  If we do, we get can bad results from lookup (bad ENOENT) and
bad readdir results.

Signed-off-by: Sage Weil <sage@newdream.net>
This commit is contained in:
Sage Weil 2010-08-22 21:33:32 -07:00
parent 679ceace84
commit 124514918b
1 changed files with 1 additions and 0 deletions
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fs/ceph/inode.c
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@ -677,6 +677,7 @@ static int fill_inode(struct inode *inode,
if (ci->i_files == 0 && ci->i_subdirs == 0 &&
ceph_snap(inode) == CEPH_NOSNAP &&
(le32_to_cpu(info->cap.caps) & CEPH_CAP_FILE_SHARED) &&
(issued & CEPH_CAP_FILE_EXCL) == 0 &&
(ci->i_ceph_flags & CEPH_I_COMPLETE) == 0) {
dout(" marking %p complete (empty)\n", inode);
ci->i_ceph_flags |= CEPH_I_COMPLETE;