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authorMiklos Szeredi <mszeredi@suse.cz>2011-03-21 13:58:06 +0100
committerMiklos Szeredi <mszeredi@suse.cz>2011-03-21 13:58:06 +0100
commite7c0a167860620bd2938366896964f729ddaeaaa (patch)
tree478680f3a309283e5e401cd0867cb7543d7318ff /fs/fuse
parent19690ddb65dbfc7be1b411fce12d3332acefbfb5 (diff)
downloadlinux-e7c0a167860620bd2938366896964f729ddaeaaa.tar.bz2
fuse: make fuse_dentry_revalidate() RCU aware
Only bail out of fuse_dentry_revalidate() on LOOKUP_RCU when blocking is actually necessary. CC: Nick Piggin <npiggin@gmail.com> Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Diffstat (limited to 'fs/fuse')
-rw-r--r--fs/fuse/dir.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index 3b84b913b16e..c6ba49bd95b3 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -158,10 +158,7 @@ static int fuse_dentry_revalidate(struct dentry *entry, struct nameidata *nd)
{
struct inode *inode;
- if (nd && nd->flags & LOOKUP_RCU)
- return -ECHILD;
-
- inode = entry->d_inode;
+ inode = ACCESS_ONCE(entry->d_inode);
if (inode && is_bad_inode(inode))
return 0;
else if (fuse_dentry_time(entry) < get_jiffies_64()) {
@@ -177,6 +174,9 @@ static int fuse_dentry_revalidate(struct dentry *entry, struct nameidata *nd)
if (!inode)
return 0;
+ if (nd->flags & LOOKUP_RCU)
+ return -ECHILD;
+
fc = get_fuse_conn(inode);
req = fuse_get_req(fc);
if (IS_ERR(req))