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[PATCH] sysfs: fix sysfs_chmod_file 

o sysfs_chmod_file() must update the new iattr field in sysfs_dirent else
  the mode change will not be persistent in case of inode evacuation from
  cache.

Signed-off-by: Maneesh Soni <maneesh@in.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Maneesh Soni 2005-07-29 12:13:35 -07:00 committed by Linus Torvalds
parent 30d07a22a1
commit bc062b1b5c
1 changed files with 10 additions and 8 deletions
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18
fs/sysfs/file.c
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@ -437,8 +437,8 @@ int sysfs_chmod_file(struct kobject *kobj, struct attribute *attr, mode_t mode)
{
struct dentry *dir = kobj->dentry;
struct dentry *victim;
struct sysfs_dirent *sd;
umode_t umode = (mode & S_IALLUGO) | S_IFREG;
struct inode * inode;
struct iattr newattrs;
int res = -ENOENT;
down(&dir->d_inode->i_sem);
@ -446,13 +446,15 @@ int sysfs_chmod_file(struct kobject *kobj, struct attribute *attr, mode_t mode)
if (!IS_ERR(victim)) {
if (victim->d_inode &&
(victim->d_parent->d_inode == dir->d_inode)) {
sd = victim->d_fsdata;
attr->mode = mode;
sd->s_mode = umode;
victim->d_inode->i_mode = umode;
dput(victim);
res = 0;
inode = victim->d_inode;
down(&inode->i_sem);
newattrs.ia_mode = (mode & S_IALLUGO) |
(inode->i_mode & ~S_IALLUGO);
newattrs.ia_valid = ATTR_MODE | ATTR_CTIME;
res = notify_change(victim, &newattrs);
up(&inode->i_sem);
}
dput(victim);
}
up(&dir->d_inode->i_sem);