linux-stable/ipc
Christian Brauner 4609e1f18e
fs: port ->permission() to pass mnt_idmap
Convert to struct mnt_idmap.

Last cycle we merged the necessary infrastructure in
256c8aed2b ("fs: introduce dedicated idmap type for mounts").
This is just the conversion to struct mnt_idmap.

Currently we still pass around the plain namespace that was attached to a
mount. This is in general pretty convenient but it makes it easy to
conflate namespaces that are relevant on the filesystem with namespaces
that are relevent on the mount level. Especially for non-vfs developers
without detailed knowledge in this area this can be a potential source for
bugs.

Once the conversion to struct mnt_idmap is done all helpers down to the
really low-level helpers will take a struct mnt_idmap argument instead of
two namespace arguments. This way it becomes impossible to conflate the two
eliminating the possibility of any bugs. All of the vfs and all filesystems
only operate on struct mnt_idmap.

Acked-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
2023-01-19 09:24:28 +01:00
..
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
compat.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ipc_sysctl.c ipc: Remove extra braces 2022-05-03 17:25:58 -05:00
mq_sysctl.c ipc: Store mqueue sysctls in the ipc namespace 2022-03-08 13:39:40 -06:00
mqueue.c fs: port ->permission() to pass mnt_idmap 2023-01-19 09:24:28 +01:00
msg.c ipc/msg.c: fix percpu_counter use after free 2022-10-28 13:37:22 -07:00
msgutil.c ipc: Use generic ns_common::count 2020-08-19 14:13:52 +02:00
namespace.c ipc/msg: mitigate the lock contention with percpu counter 2022-10-03 14:21:44 -07:00
sem.c ipc/sem: Fix dangling sem_array access in semtimedop race 2022-12-05 10:54:44 -08:00
shm.c ipc/shm: call underlying open/close vm_ops 2022-11-22 18:50:42 -08:00
syscall.c y2038: remove CONFIG_64BIT_TIME 2019-11-15 14:38:27 +01:00
util.c ipc/util.c: cleanup and improve sysvipc_find_ipc() 2022-09-11 21:55:05 -07:00
util.h ipc/msg: mitigate the lock contention with percpu counter 2022-10-03 14:21:44 -07:00