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authorNick Piggin <npiggin@kernel.dk>2011-01-07 09:49:58 +0300
committerNick Piggin <npiggin@kernel.dk>2011-01-07 09:50:29 +0300
commitb74c79e99389cd79b31fcc08f82c24e492e63c7e (patch)
tree763c6b412517306670bc625e90035f2d16bb739f /fs/hostfs
parent34286d6662308d82aed891852d04c7c3a2649b16 (diff)
downloadlinux-b74c79e99389cd79b31fcc08f82c24e492e63c7e.tar.xz
fs: provide rcu-walk aware permission i_ops
Signed-off-by: Nick Piggin <npiggin@kernel.dk>
Diffstat (limited to 'fs/hostfs')
-rw-r--r--fs/hostfs/hostfs_kern.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index 0bc81cf256b8..d3244d949a4e 100644
--- a/fs/hostfs/hostfs_kern.c
+++ b/fs/hostfs/hostfs_kern.c
@@ -749,11 +749,14 @@ int hostfs_rename(struct inode *from_ino, struct dentry *from,
return err;
}
-int hostfs_permission(struct inode *ino, int desired)
+int hostfs_permission(struct inode *ino, int desired, unsigned int flags)
{
char *name;
int r = 0, w = 0, x = 0, err;
+ if (flags & IPERM_FLAG_RCU)
+ return -ECHILD;
+
if (desired & MAY_READ) r = 1;
if (desired & MAY_WRITE) w = 1;
if (desired & MAY_EXEC) x = 1;
@@ -768,7 +771,7 @@ int hostfs_permission(struct inode *ino, int desired)
err = access_file(name, r, w, x);
__putname(name);
if (!err)
- err = generic_permission(ino, desired, NULL);
+ err = generic_permission(ino, desired, flags, NULL);
return err;
}