vfs: update ctime when changing the file's permission by setfacl

generic_acl_set didn't update the ctime of the file when its permission was
changed.

Steps to reproduce:
 # touch aaa
 # stat -c %Z aaa
 1275289822
 # setfacl -m  'u::x,g::x,o::x' aaa
 # stat -c %Z aaa
 1275289822                         <- unchanged

But, according to the spec of the ctime, vfs must update it.

Port of ext3 patch by Miao Xie <miaox@cn.fujitsu.com>.

CC: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 1 insertions, 0 deletions

diff --git a/fs/generic_acl.c b/fs/generic_acl.c
index 99800e564157..6bc9e3a5a693 100644
--- a/fs/generic_acl.c
+++ b/fs/generic_acl.c
@@ -94,6 +94,7 @@ generic_acl_set(struct dentry *dentry, const char *name, const void *value,
                         if (error < 0)
                                 goto failed;
                         inode->i_mode = mode;
+                        inode->i_ctime = CURRENT_TIME;
                         if (error == 0) {
                                 posix_acl_release(acl);
                                 acl = NULL;