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authorEric W. Biederman <ebiederm@xmission.com>2011-10-12 22:02:43 +0000
committerDavid S. Miller <davem@davemloft.net>2011-10-19 19:24:16 -0400
commit903e21e2eea036f6947f523f732e28b33a63ed0f (patch)
treee63059c0acbfde6eca66cd9c293a984e64d6cab8 /fs/sysfs/file.c
parent23396180a9770df2c6a694bbb689c12bdf792f94 (diff)
downloadvexpress-lsk-903e21e2eea036f6947f523f732e28b33a63ed0f.tar.gz
sysfs: Reject with a warning invalid uses of tagged directories.
sysfs is a core piece of ifrastructure that many people use and few people have all of the rules in their head on how to use it correctly. Add warnings for people using tagged directories improperly to that any misuses can be caught and diagnosed quickly. A single inexpensive test in sysfs_find_dirent is almost sufficient to catch all possible misuses. An additional warning is needed in sysfs_add_dirent so that we actually fail when attempting to add an untagged dirent in a tagged directory. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Acked-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'fs/sysfs/file.c')
-rw-r--r--fs/sysfs/file.c3
1 files changed, 0 insertions, 3 deletions
diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c
index 07c1b4ec00d..d4e6080b4b2 100644
--- a/fs/sysfs/file.c
+++ b/fs/sysfs/file.c
@@ -466,9 +466,6 @@ void sysfs_notify(struct kobject *k, const char *dir, const char *attr)
mutex_lock(&sysfs_mutex);
if (sd && dir)
- /* Only directories are tagged, so no need to pass
- * a tag explicitly.
- */
sd = sysfs_find_dirent(sd, NULL, dir);
if (sd && attr)
sd = sysfs_find_dirent(sd, NULL, attr);