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authorAl Viro <viro@zeniv.linux.org.uk>2014-09-11 18:55:50 -0400
committerAl Viro <viro@zeniv.linux.org.uk>2014-09-13 22:14:03 -0400
commit6f18493e541c690169c3b1479d47d95f624161cf (patch)
treeefd828b382e5dc61ad510fdf26db7c819e91fce4 /fs
parentf77ced6637a18d4f543458a112881776a6b7fa8c (diff)
downloadlinux-6f18493e541c690169c3b1479d47d95f624161cf.tar.bz2
move the call of __d_drop(anon) into __d_materialise_unique(dentry, anon)
and lock the right list there Cc: stable@vger.kernel.org Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs')
-rw-r--r--fs/dcache.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/fs/dcache.c b/fs/dcache.c
index d30ce699ae4b..5c6e71dc23f5 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -2656,6 +2656,12 @@ static void __d_materialise_dentry(struct dentry *dentry, struct dentry *anon)
dentry->d_parent = dentry;
list_del_init(&dentry->d_u.d_child);
anon->d_parent = dparent;
+ if (likely(!d_unhashed(anon))) {
+ hlist_bl_lock(&anon->d_sb->s_anon);
+ __hlist_bl_del(&anon->d_hash);
+ anon->d_hash.pprev = NULL;
+ hlist_bl_unlock(&anon->d_sb->s_anon);
+ }
list_move(&anon->d_u.d_child, &dparent->d_subdirs);
write_seqcount_end(&dentry->d_seq);
@@ -2714,7 +2720,6 @@ struct dentry *d_splice_alias(struct inode *inode, struct dentry *dentry)
write_seqlock(&rename_lock);
__d_materialise_dentry(dentry, new);
write_sequnlock(&rename_lock);
- __d_drop(new);
_d_rehash(new);
spin_unlock(&new->d_lock);
spin_unlock(&inode->i_lock);
@@ -2778,7 +2783,6 @@ struct dentry *d_materialise_unique(struct dentry *dentry, struct inode *inode)
* could splice into our tree? */
__d_materialise_dentry(dentry, alias);
write_sequnlock(&rename_lock);
- __d_drop(alias);
goto found;
} else {
/* Nope, but we must(!) avoid directory