summaryrefslogtreecommitdiffstats
path: root/fs/fat/namei_vfat.c
diff options
context:
space:
mode:
authorNick Piggin <npiggin@kernel.dk>2011-01-07 07:49:57 +0100
committerNick Piggin <npiggin@kernel.dk>2011-01-07 07:50:29 +0100
commit34286d6662308d82aed891852d04c7c3a2649b16 (patch)
treec4b7311404d302e7cb94df7a4690298e1059910a /fs/fat/namei_vfat.c
parentfs: cache optimise dentry and inode for rcu-walk (diff)
downloadlinux-34286d6662308d82aed891852d04c7c3a2649b16.tar.xz
linux-34286d6662308d82aed891852d04c7c3a2649b16.zip
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/fat/namei_vfat.c')
-rw-r--r--fs/fat/namei_vfat.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/fat/namei_vfat.c b/fs/fat/namei_vfat.c
index 3be5ed7d859f..e3ffc5e12332 100644
--- a/fs/fat/namei_vfat.c
+++ b/fs/fat/namei_vfat.c
@@ -43,6 +43,9 @@ static int vfat_revalidate_shortname(struct dentry *dentry)
static int vfat_revalidate(struct dentry *dentry, struct nameidata *nd)
{
+ if (nd->flags & LOOKUP_RCU)
+ return -ECHILD;
+
/* This is not negative dentry. Always valid. */
if (dentry->d_inode)
return 1;
@@ -51,6 +54,9 @@ static int vfat_revalidate(struct dentry *dentry, struct nameidata *nd)
static int vfat_revalidate_ci(struct dentry *dentry, struct nameidata *nd)
{
+ if (nd->flags & LOOKUP_RCU)
+ return -ECHILD;
+
/*
* This is not negative dentry. Always valid.
*