Teach sysfs_update_file how to handle multiple sysfs
superblocks. Again we are just iterating over the superblocks
to so all of the filesystem modification notifications work
as expected.
Signed-off-by: Eric W. Biederman <[EMAIL PROTECTED]>
---
fs/sysfs/file.c | 35 +++++++++++++++++++++--------------
1 files changed, 21 insertions(+), 14 deletions(-)
diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c
index cff054f..1e6f9df 100644
--- a/fs/sysfs/file.c
+++ b/fs/sysfs/file.c
@@ -462,7 +462,8 @@ EXPORT_SYMBOL_GPL(sysfs_add_file_to_group);
int sysfs_update_file(struct kobject * kobj, const struct attribute * attr)
{
struct sysfs_dirent *victim_sd = NULL;
- struct dentry *victim = NULL;
+ struct super_block *sb;
+ struct dentry *victim;
int rc;
rc = -ENOENT;
@@ -471,21 +472,27 @@ int sysfs_update_file(struct kobject * kobj, const struct
attribute * attr)
goto out;
mutex_lock(&sysfs_rename_mutex);
- victim = sysfs_get_dentry(sysfs_sb, victim_sd);
- mutex_unlock(&sysfs_rename_mutex);
- if (IS_ERR(victim)) {
- rc = PTR_ERR(victim);
- victim = NULL;
- goto out;
+ sysfs_grab_supers();
+ list_for_each_entry(sb, &sysfs_fs_type.fs_supers, s_instances) {
+ victim = sysfs_get_dentry(sb, victim_sd);
+ if (!victim)
+ continue;
+ if (IS_ERR(victim)) {
+ rc = PTR_ERR(victim);
+ victim = NULL;
+ goto out_unlock;
+ }
+ mutex_lock(&victim->d_inode->i_mutex);
+ victim->d_inode->i_mtime = CURRENT_TIME;
+ fsnotify_modify(victim);
+ mutex_unlock(&victim->d_inode->i_mutex);
+ rc = 0;
+ dput(victim);
}
-
- mutex_lock(&victim->d_inode->i_mutex);
- victim->d_inode->i_mtime = CURRENT_TIME;
- fsnotify_modify(victim);
- mutex_unlock(&victim->d_inode->i_mutex);
- rc = 0;
+ out_unlock:
+ sysfs_release_supers();
+ mutex_unlock(&sysfs_rename_mutex);
out:
- dput(victim);
sysfs_put(victim_sd);
return rc;
}
--
1.5.1.1.181.g2de0
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
