Messages in this thread Patch in this message | | | From | (Eric W. Biederman) | Subject | [PATCH 22/25] sysfs: sysfs_uptdate_file handle multiple superblocks | Date | Tue, 07 Aug 2007 15:34:11 -0600 |
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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 <ebiederm@xmission.com> --- 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 majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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