VisionFive2 Linux kernel

author: Nick Piggin <npiggin@kernel.dk> 2011-01-07 17:49:58 +1100 committer: Nick Piggin <npiggin@kernel.dk> 2011-01-07 17:50:29 +1100 commit: b74c79e99389cd79b31fcc08f82c24e492e63c7e parent: 34286d6662308d82aed891852d04c7c3a2649b16

Commit Summary:

fs: provide rcu-walk aware permission i_ops

Diffstat:

1 file 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;
 }