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authorNick Piggin <npiggin@kernel.dk>2011-01-07 09:49:57 +0300
committerNick Piggin <npiggin@kernel.dk>2011-01-07 09:50:29 +0300
commit34286d6662308d82aed891852d04c7c3a2649b16 (patch)
treec4b7311404d302e7cb94df7a4690298e1059910a /fs/ecryptfs/dentry.c
parent44a7d7a878c9cbb74f236ea755b25b6b2e26a9a9 (diff)
downloadlinux-34286d6662308d82aed891852d04c7c3a2649b16.tar.xz
fs: rcu-walk aware d_revalidate method
Require filesystems be aware of .d_revalidate being called in rcu-walk mode (nd->flags & LOOKUP_RCU). For now do a simple push down, returning -ECHILD from all implementations. Signed-off-by: Nick Piggin <npiggin@kernel.dk>
Diffstat (limited to 'fs/ecryptfs/dentry.c')
-rw-r--r--fs/ecryptfs/dentry.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/fs/ecryptfs/dentry.c b/fs/ecryptfs/dentry.c
index 906e803f7f79..6fc4f319b550 100644
--- a/fs/ecryptfs/dentry.c
+++ b/fs/ecryptfs/dentry.c
@@ -44,12 +44,17 @@
*/
static int ecryptfs_d_revalidate(struct dentry *dentry, struct nameidata *nd)
{
- struct dentry *lower_dentry = ecryptfs_dentry_to_lower(dentry);
- struct vfsmount *lower_mnt = ecryptfs_dentry_to_lower_mnt(dentry);
+ struct dentry *lower_dentry;
+ struct vfsmount *lower_mnt;
struct dentry *dentry_save;
struct vfsmount *vfsmount_save;
int rc = 1;
+ if (nd->flags & LOOKUP_RCU)
+ return -ECHILD;
+
+ lower_dentry = ecryptfs_dentry_to_lower(dentry);
+ lower_mnt = ecryptfs_dentry_to_lower_mnt(dentry);
if (!lower_dentry->d_op || !lower_dentry->d_op->d_revalidate)
goto out;
dentry_save = nd->path.dentry;