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| author | Yan, Zheng <zheng.z.yan@intel.com> | 2013-08-13 15:42:02 +0800 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2013-09-03 22:50:28 -0400 |
| commit | 590fb51f1cf99c4a48a3b1bd65885192e877b561 (patch) | |
| tree | 62e706e81be88a9760a126b4270e2b09c03933a1 /mm/nommu.c | |
| parent | 184cacabe274a0af65b3876e9cd95c9fdde069ea (diff) | |
| download | linux-590fb51f1cf99c4a48a3b1bd65885192e877b561.tar.bz2 | |
vfs: call d_op->d_prune() before unhashing dentry
The d_prune dentry operation is used to notify filesystem when VFS
about to prune a hashed dentry from the dcache. There are three
code paths that prune dentries: shrink_dcache_for_umount_subtree(),
prune_dcache_sb() and d_prune_aliases(). For the d_prune_aliases()
case, VFS unhashes the dentry first, then call the d_prune dentry
operation. This confuses ceph_d_prune() (ceph uses the d_prune
dentry operation to maintain a flag indicating whether the complete
contents of a directory are in the dcache, pruning unhashed dentry
does not affect dir's completeness)
This patch fixes the issue by calling the d_prune dentry operation
in d_prune_aliases(), before unhashing the dentry. Also make VFS
only call the d_prune dentry operation for hashed dentry, to avoid
calling the d_prune dentry operation twice when dentry is pruned
by d_prune_aliases().
Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'mm/nommu.c')
0 files changed, 0 insertions, 0 deletions