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sysfs: fix sysfs_chmod_file() such that it updates sd->s_mode too

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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 <[email protected]>
Acked-by: Cornelia Huck <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Tejun Heo 2007-09-20 16:05:10 +09:00 • committed by Greg Kroah-Hartman
commit f88123eaf9
1 changed files with 9 additions and 0 deletions
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9
fs/sysfs/file.c
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@ -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);