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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 <npiggin@kernel.dk>
This commit is contained in:
Nick Piggin
2011-01-07 17:49:57 +11:00
parent 44a7d7a878
commit 34286d6662
27 changed files with 215 additions and 61 deletions
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7
fs/coda/dir.c
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@ -18,6 +18,7 @@
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/spinlock.h>
#include <linux/namei.h>
#include <asm/uaccess.h>
@ -541,9 +542,13 @@ out:
/* called when a cache lookup succeeds */
static int coda_dentry_revalidate(struct dentry *de, struct nameidata *nd)
{
struct inode *inode = de->d_inode;
struct inode *inode;
struct coda_inode_info *cii;
if (nd->flags & LOOKUP_RCU)
return -ECHILD;
inode = de->d_inode;
if (!inode || coda_isroot(inode))
goto out;
if (is_bad_inode(inode))