From f88123eaf953f13a0c597dde54745d28f81236de Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Thu, 20 Sep 2007 16:05:10 +0900
Subject: [PATCH] sysfs: fix sysfs_chmod_file() such that it updates sd->s_mode
too
sysfs_chmod_file() looked and updated only inode of the target file.
Dentry and inode are reclaimable and the update mode data will go away
when the inode is reclaimed. This patch makes sysfs_chmod_file()
update sd->s_mode too such that the change is permanent.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
fs/sysfs/file.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c
index ff93c92164b3..9fdf8dae0dcd 100644
--- a/fs/sysfs/file.c
+++ b/fs/sysfs/file.c
@@ -521,10 +521,19 @@ int sysfs_chmod_file(struct kobject *kobj, struct attribute *attr, mode_t mode)
}
inode = victim->d_inode;
+
mutex_lock(&inode->i_mutex);
+
newattrs.ia_mode = (mode & S_IALLUGO) | (inode->i_mode & ~S_IALLUGO);
newattrs.ia_valid = ATTR_MODE | ATTR_CTIME;
rc = notify_change(victim, &newattrs);
+
+ if (rc == 0) {
+ mutex_lock(&sysfs_mutex);
+ victim_sd->s_mode = newattrs.ia_mode;
+ mutex_unlock(&sysfs_mutex);
+ }
+
mutex_unlock(&inode->i_mutex);
out:
dput(victim);