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fs: rcu-walk aware d_revalidate method

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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 <[email protected]>
This commit is contained in:
Nick Piggin 2011-01-07 17:49:57 +11:00
commit 34286d6662
27 changed files with 215 additions and 61 deletions
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6
fs/fuse/dir.c
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@ -156,8 +156,12 @@ u64 fuse_get_attr_version(struct fuse_conn *fc)
*/
static int fuse_dentry_revalidate(struct dentry *entry, struct nameidata *nd)
{
struct inode *inode = entry->d_inode;
struct inode *inode;
if (nd->flags & LOOKUP_RCU)
return -ECHILD;
inode = entry->d_inode;
if (inode && is_bad_inode(inode))
return 0;
else if (fuse_dentry_time(entry) < get_jiffies_64()) {