lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

fsnotify: store struct file not struct path

Browse Source 
Al explains that calling dentry_open() with a mnt/dentry pair is only
garunteed to be safe if they are already used in an open struct file.  To
make sure this is the case don't store and use a struct path in fsnotify,
always use a struct file.

Signed-off-by: Eric Paris <eparis@redhat.com>
This commit is contained in:
Eric Paris
2010-07-28 10:18:37 -04:00
parent f70ab54cc6
commit 3bcf3860a4
8 changed files with 56 additions and 63 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
fs/notify/fanotify/fanotify_user.c
View File

@ -65,7 +65,7 @@ static int create_fd(struct fsnotify_group *group, struct fsnotify_event *event)
if (client_fd < 0)
return client_fd;
if (event->data_type != FSNOTIFY_EVENT_PATH) {
if (event->data_type != FSNOTIFY_EVENT_FILE) {
WARN_ON(1);
put_unused_fd(client_fd);
return -EINVAL;
@ -75,8 +75,8 @@ static int create_fd(struct fsnotify_group *group, struct fsnotify_event *event)
* we need a new file handle for the userspace program so it can read even if it was
* originally opened O_WRONLY.
*/
dentry = dget(event->path.dentry);
mnt = mntget(event->path.mnt);
dentry = dget(event->file->f_path.dentry);
mnt = mntget(event->file->f_path.mnt);
/* it's possible this event was an overflow event. in that case dentry and mnt
* are NULL; That's fine, just don't call dentry open */
if (dentry && mnt)