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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/ocfs2/dcache.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/ocfs2/dcache.c')
-rw-r--r--fs/ocfs2/dcache.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/fs/ocfs2/dcache.c b/fs/ocfs2/dcache.c
index 4d54c60ceee4..0310b16a7238 100644
--- a/fs/ocfs2/dcache.c
+++ b/fs/ocfs2/dcache.c
@@ -52,9 +52,15 @@ void ocfs2_dentry_attach_gen(struct dentry *dentry)
static int ocfs2_dentry_revalidate(struct dentry *dentry,
struct nameidata *nd)
{
- struct inode *inode = dentry->d_inode;
+ struct inode *inode;
int ret = 0; /* if all else fails, just return false */
- struct ocfs2_super *osb = OCFS2_SB(dentry->d_sb);
+ struct ocfs2_super *osb;
+
+ if (nd->flags & LOOKUP_RCU)
+ return -ECHILD;
+
+ inode = dentry->d_inode;
+ osb = OCFS2_SB(dentry->d_sb);
mlog_entry("(0x%p, '%.*s')\n", dentry,
dentry->d_name.len, dentry->d_name.name);