Al Viro c64cd6e34e
reimplement path_mountpoint() with less magic ...
... and get rid of a bunch of bugs in it. Background:
the reason for path_mountpoint() is that umount() really doesn't
want attempts to revalidate the root of what it's trying to umount.
The thing we want to avoid actually happen from complete_walk();
solution was to do something parallel to normal path_lookupat()
and it both went overboard and got the boilerplate subtly
(and not so subtly) wrong.
A better solution is to do pretty much what the normal path_lookupat()
does, but instead of complete_walk() do unlazy_walk(). All it takes
to avoid that ->d_weak_revalidate() call... mountpoint_last() goes
away, along with everything it got wrong, and so does the magic around
LOOKUP_NO_REVAL.
Another source of bugs is that when we traverse mounts at the final
location (and we need to do that - umount . expects to get whatever's
overmounting ., if any, out of the lookup) we really ought to take
care of ->d_manage() - as it is, manual umount of autofs automount
in progress can lead to unpleasant surprises for the daemon. Easily
solved by using handle_lookup_down() instead of follow_mount().
Tested-by: Ian Kent <raven@themaw.net >
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk >
2020-01-15 01:36:06 -05:00
2019-11-16 21:51:42 -08:00
2019-11-27 22:28:37 +01:00
2019-11-27 08:15:00 -08:00
2019-11-14 16:03:35 +05:30
2019-12-05 11:43:31 -08:00
2019-10-31 14:19:45 -07:00
2019-11-22 19:56:20 +00:00
2019-11-03 10:47:42 +00:00
2019-12-03 09:29:50 -08:00
2019-11-12 11:43:29 -05:00
2019-12-05 11:43:31 -08:00
2019-11-27 10:17:28 -08:00
2019-11-18 10:05:38 +01:00
2019-11-11 20:42:55 +02:00
2019-12-06 08:26:50 -08:00
2019-11-13 11:33:53 +01:00
2019-11-07 13:10:08 +00:00
2019-11-26 16:02:40 -08:00
2019-12-05 11:43:31 -08:00
2019-11-09 16:46:56 +05:30
2019-12-07 16:56:00 -08:00
2019-11-16 14:45:31 +01:00
2019-12-04 13:32:45 +10:00
2019-11-14 12:31:00 +08:00
2019-11-23 09:56:02 -08:00
2019-12-04 19:44:14 -08:00
2019-12-04 19:44:12 -08:00
2019-11-21 09:06:47 -07:00
2019-11-18 08:40:41 -07:00
2019-11-13 12:50:38 -07:00
2019-12-03 08:51:25 -07:00
2019-11-15 23:44:48 +01:00
2019-11-24 17:04:11 -08:00
2019-11-24 17:12:11 -08:00
2019-11-14 13:15:11 -05:00
2019-11-15 23:45:24 +01:00
2019-12-04 19:44:12 -08:00
2019-12-03 07:36:38 -07:00
2019-11-12 08:18:04 -08:00
2019-11-12 08:18:04 -08:00
2019-11-11 13:59:35 +01:00
2019-12-01 14:00:59 -08:00
2019-11-04 21:57:51 +01:00
2019-11-07 07:00:26 +01:00
2019-11-26 10:26:26 +01:00
2019-11-26 09:43:34 -08:00
2019-11-29 11:48:39 +01:00
2019-11-17 09:02:49 +08:00
2019-11-15 13:49:04 -05:00
2019-11-21 14:28:32 +01:00
2019-11-25 11:53:26 -08:00
2019-11-28 11:16:43 -08:00
2019-11-21 18:14:35 +01:00
2019-11-28 11:16:43 -08:00
2019-11-20 20:31:38 +01:00
2019-11-11 16:07:13 +01:00
2019-12-03 11:20:37 +01:00
2019-11-10 12:40:14 +01:00
2019-11-26 19:25:25 -08:00
2019-11-07 07:02:40 +01:00
2019-12-05 12:27:16 -08:00
2019-11-12 08:18:04 -08:00
2019-12-02 14:46:22 -08:00
2019-12-01 09:34:03 -08:00
2019-12-02 14:46:22 -08:00
2019-11-06 12:34:36 -08:00
2019-11-27 11:42:01 -08:00
2019-11-20 09:40:10 +01:00
2019-11-27 11:06:20 -08:00
2019-12-04 19:44:13 -08:00
2019-11-14 07:43:53 -07:00
2019-12-01 12:59:06 -08:00
2019-11-23 19:56:45 -04:00
2019-11-06 23:18:31 +01:00
2019-11-06 13:02:17 +01:00
2019-12-01 12:59:08 -08:00
2019-11-21 20:10:44 -05:00
2019-11-28 17:15:21 +01:00
2019-11-05 14:03:11 -08:00
2019-11-05 14:03:11 -08:00
2019-11-08 08:46:49 -08:00
2019-11-12 12:25:49 +11:00
2019-11-11 16:10:54 +01:00
2019-12-03 12:20:25 -08:00
2019-11-04 19:59:30 +00:00
2019-11-11 08:40:18 +00:00
2019-11-12 17:11:25 +01:00
2019-11-07 15:44:14 +01:00
2019-11-11 09:02:56 +01:00
2019-11-16 10:20:02 +00:00
2019-11-16 10:18:52 +00:00
2019-11-30 10:53:02 -08:00
2019-12-01 12:59:05 -08:00
2019-12-04 19:44:14 -08:00
2019-11-21 07:33:24 +01:00
2019-12-04 19:44:12 -08:00
2019-11-12 08:18:04 -08:00
2019-11-21 12:03:40 +01:00
2019-11-03 17:38:36 +01:00
2019-11-03 17:38:55 +01:00
2019-11-01 08:50:51 -06:00
2019-11-26 13:35:25 -07:00
2019-11-19 09:52:12 -08:00
2019-11-14 11:36:53 +08:00
2019-11-01 13:08:19 +01:00
2019-11-05 08:45:46 +08:00
2019-12-01 12:59:08 -08:00
2019-12-01 12:59:07 -08:00
2019-12-01 12:59:10 -08:00
2019-11-15 18:34:00 -08:00
2019-11-07 15:45:00 +01:00
2019-12-06 10:28:09 -08:00
2019-11-06 08:28:58 -08:00
2019-12-04 19:44:15 -08:00
2019-11-23 19:56:44 -04:00
2019-12-01 12:59:10 -08:00
2019-11-14 11:36:53 +08:00
2019-12-01 12:59:05 -08:00
2019-11-07 15:11:48 +01:00
2020-01-15 01:36:06 -05:00
2019-11-14 19:06:47 -08:00
2019-12-07 11:55:11 -08:00
2019-11-06 08:55:24 -05:00
2019-11-06 08:55:23 -05:00
2019-11-06 08:55:23 -05:00
2019-12-04 19:44:12 -08:00
2019-11-04 10:56:40 -07:00
2019-11-22 02:21:08 +09:00
2019-11-27 10:53:50 -08:00
2019-11-04 11:21:25 -08:00
2019-11-21 07:49:29 -06:00
2019-11-06 08:28:58 -08:00
2019-12-01 12:59:04 -08:00
2019-11-06 13:02:43 +01:00
2019-11-13 19:09:47 +08:00
2019-11-20 16:30:10 +00:00
2019-12-03 13:58:22 -08:00
2019-11-25 14:28:04 -08:00
2019-11-16 20:02:47 -08:00
2019-11-26 15:04:47 -08:00
2019-11-25 10:47:00 -08:00
2019-11-23 16:13:39 -08:00
2019-11-15 23:49:22 +01:00
2019-11-15 23:49:22 +01:00
2019-12-07 13:21:01 -08:00
2019-11-05 18:33:13 +01:00
2019-11-13 11:41:50 +01:00
2019-11-11 10:27:15 +05:30
2019-11-29 12:04:50 +01:00
2019-11-13 11:41:50 +01:00
2019-12-04 19:44:11 -08:00
2019-11-05 23:18:10 +01:00
2019-12-06 10:28:09 -08:00
2019-11-11 11:06:27 +01:00
2019-11-06 10:52:10 +01:00
2019-11-01 22:26:34 -04:00
2019-12-04 19:44:13 -08:00
2019-11-26 16:02:40 -08:00
2019-11-25 09:15:32 +01:00
2019-12-05 11:43:31 -08:00
2019-12-05 11:43:31 -08:00
2019-11-14 13:07:48 +08:00
2019-11-13 12:50:40 -07:00
2019-12-04 19:44:14 -08:00
2019-11-30 14:35:43 -08:00
2019-11-04 07:11:31 -07:00
2019-11-14 13:15:12 -05:00
2019-11-20 22:29:40 -08:00
2019-12-04 17:11:25 -08:00
2019-11-28 22:40:29 -08:00
2019-12-01 06:29:17 -08:00
2019-12-03 07:04:30 -07:00
2019-11-14 13:15:11 -05:00
2019-11-13 12:15:34 -08:00
2019-11-04 11:21:25 -08:00
2019-12-01 06:29:18 -08:00
2019-12-01 12:59:07 -08:00
2019-11-04 11:21:25 -08:00
2019-11-15 14:38:30 +01:00
2019-12-04 19:44:11 -08:00
2019-11-13 00:33:21 +11:00
2019-11-07 07:00:26 +01:00
2019-12-04 19:44:14 -08:00
2019-11-26 15:42:43 -08:00
2019-11-15 14:38:29 +01:00
2019-12-06 21:05:14 -08:00
2019-11-12 21:45:37 +02:00
2019-11-22 19:41:08 -05:00
2019-11-14 13:15:12 -05:00
2019-11-22 19:41:08 -05:00
2019-12-01 14:00:59 -08:00
2019-11-07 20:03:08 -08:00
2019-11-02 12:39:12 -07:00
2019-11-14 18:12:18 -08:00
2019-12-01 12:59:05 -08:00
2019-12-04 19:44:11 -08:00
2019-11-14 18:12:18 -08:00
2019-11-14 12:20:02 +08:00
c64cd6e34e