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From: Amir Goldstein <amir73il@gmail.com>
To: Jan Kara <jack@suse.cz>
Cc: linux-fsdevel@vger.kernel.org, Tejun Heo <tj@kernel.org>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Subject: [PATCH 05/20] kernfs: do not call fsnotify() with name without a parent
Date: Fri, 12 Jun 2020 12:33:28 +0300	[thread overview]
Message-ID: <20200612093343.5669-6-amir73il@gmail.com> (raw)
In-Reply-To: <20200612093343.5669-1-amir73il@gmail.com>

When creating an FS_MODIFY event on inode itself (not on parent)
the file_name argument should be NULL.

The change to send a non NULL name to inode itself was done on purpuse
as part of another commit, as Tejun writes: "...While at it, supply the
target file name to fsnotify() from kernfs_node->name.".

But this is wrong practice and inconsistent with inotify behavior when
watching a single file.  When a child is being watched (as opposed to the
parent directory) the inotify event should contain the watch descriptor,
but not the file name.

Fixes: df6a58c5c5aa ("kernfs: don't depend on d_find_any_alias()...")
Cc: Tejun Heo <tj@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
---
 fs/kernfs/file.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/kernfs/file.c b/fs/kernfs/file.c
index 06b342d8462b..e23b3f62483c 100644
--- a/fs/kernfs/file.c
+++ b/fs/kernfs/file.c
@@ -912,7 +912,7 @@ static void kernfs_notify_workfn(struct work_struct *work)
 		}
 
 		fsnotify(inode, FS_MODIFY, inode, FSNOTIFY_EVENT_INODE,
-			 &name, 0);
+			 NULL, 0);
 		iput(inode);
 	}
 
-- 
2.17.1


  parent reply	other threads:[~2020-06-12  9:34 UTC|newest]

Thread overview: 35+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-12  9:33 [PATCH 00/20] Prep work for fanotify named events Amir Goldstein
2020-06-12  9:33 ` [PATCH 01/20] fsnotify: Rearrange fast path to minimise overhead when there is no watcher Amir Goldstein
2020-07-03 14:03   ` Jan Kara
2020-07-04  9:30     ` Amir Goldstein
2020-07-06 11:05       ` Jan Kara
2020-07-09 17:56         ` fsnotify: minimise overhead when there are no marks with ignore mask Amir Goldstein
2020-07-26 15:20           ` fsnotify: minimise overhead when there are no marks related to sb Amir Goldstein
2020-07-27  7:44             ` Jan Kara
2020-07-27 10:02               ` Amir Goldstein
2020-06-12  9:33 ` [PATCH 02/20] fsnotify: fold fsnotify() call into fsnotify_parent() Amir Goldstein
2020-06-12  9:33 ` [PATCH 03/20] fsnotify: return non const from fsnotify_data_inode() Amir Goldstein
2020-06-12  9:33 ` [PATCH 04/20] nfsd: use fsnotify_data_inode() to get the unlinked inode Amir Goldstein
2020-06-12 10:25   ` Amir Goldstein
2020-06-12  9:33 ` Amir Goldstein [this message]
2020-06-29 13:27   ` [PATCH 05/20] kernfs: do not call fsnotify() with name without a parent Tejun Heo
2020-06-29 16:11   ` Greg Kroah-Hartman
2020-06-12  9:33 ` [PATCH 06/20] inotify: do not use objectid when comparing events Amir Goldstein
2020-06-12  9:33 ` [PATCH 07/20] fanotify: create overflow event type Amir Goldstein
2020-06-12  9:33 ` [PATCH 08/20] fanotify: break up fanotify_alloc_event() Amir Goldstein
2020-06-12  9:33 ` [PATCH 09/20] fsnotify: pass dir argument to handle_event() callback Amir Goldstein
2020-07-03 14:49   ` Jan Kara
2020-06-12  9:33 ` [PATCH 10/20] fanotify: generalize the handling of extra event flags Amir Goldstein
2020-06-12  9:33 ` [PATCH 11/20] fanotify: generalize merge logic of events on dir Amir Goldstein
2020-06-12  9:33 ` [PATCH 12/20] fanotify: distinguish between fid encode error and null fid Amir Goldstein
2020-06-12  9:33 ` [PATCH 13/20] fanotify: generalize test for FAN_REPORT_FID Amir Goldstein
2020-06-12  9:33 ` [PATCH 14/20] fanotify: mask out special event flags from ignored mask Amir Goldstein
2020-06-12  9:33 ` [PATCH 15/20] fanotify: prepare for implicit event flags in mark mask Amir Goldstein
2020-06-12  9:33 ` [PATCH 16/20] fanotify: use FAN_EVENT_ON_CHILD as implicit flag on sb/mount/non-dir marks Amir Goldstein
2020-06-12  9:33 ` [PATCH 17/20] fanotify: remove event FAN_DIR_MODIFY Amir Goldstein
2020-06-12  9:33 ` [PATCH 18/20] fsnotify: add object type "child" to object type iterator Amir Goldstein
2020-06-12  9:33 ` [PATCH 19/20] fanotify: move event name into fanotify_fh Amir Goldstein
2020-07-03 16:02   ` Jan Kara
2020-07-06  8:21     ` Amir Goldstein
2020-07-06 15:24       ` Jan Kara
2020-06-12  9:33 ` [PATCH 20/20] fanotify: no external fh buffer in fanotify_name_event Amir Goldstein

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