OpenCloudOS-Kernel/fs/notify/fanotify
Christian Brauner eee3a0e939
fanotify: use pidfd_prepare()
We generally try to avoid installing a file descriptor into the caller's
file descriptor table just to close it again via close_fd() in case an
error occurs. Instead we reserve a file descriptor but don't install it
into the caller's file descriptor table yet. If we fail for other,
unrelated reasons we can just close the reserved file descriptor and if
we make it past all meaningful error paths we just install it. Fanotify
gets this right already for one fd type but not for pidfds.

Use the new pidfd_prepare() helper to reserve a pidfd and a pidfd file
and switch to the more common fd allocation and installation pattern.

Acked-by: Jan Kara <jack@suse.cz>
Message-Id: <20230327-pidfd-file-api-v1-3-5c0e9a3158e4@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
2023-04-03 11:16:57 +02:00
..
Kconfig treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
Makefile treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
fanotify.c fanotify,audit: Allow audit to use the full permission event response 2023-02-07 12:53:53 +01:00
fanotify.h fanotify: define struct members to hold response decision context 2023-02-07 12:53:53 +01:00
fanotify_user.c fanotify: use pidfd_prepare() 2023-04-03 11:16:57 +02:00