diff options
| author | Manfred Spraul <manfred@colorfullife.com> | 2018-08-22 07:01:34 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-08-22 19:52:51 +0200 |
| commit | 4241c1a304078569f544d51eeaf8bc270b6e377a (patch) | |
| tree | 9468a64167df7d9919bfab0f3206baa937ab7235 /ipc/util.c | |
| parent | ipc/util.c: use ipc_rcu_putref() for failues in ipc_addid() (diff) | |
| download | linux-4241c1a304078569f544d51eeaf8bc270b6e377a.tar.xz linux-4241c1a304078569f544d51eeaf8bc270b6e377a.zip | |
ipc: rename ipcctl_pre_down_nolock()
Both the comment and the name of ipcctl_pre_down_nolock() are misleading:
The function must be called while holdling the rw semaphore.
Therefore the patch renames the function to ipcctl_obtain_check(): This
name matches the other names used in util.c:
- "obtain" function look up a pointer in the idr, without
acquiring the object lock.
- The caller is responsible for locking.
- _check means that the sequence number is checked.
Link: http://lkml.kernel.org/r/20180712185241.4017-5-manfred@colorfullife.com
Signed-off-by: Manfred Spraul <manfred@colorfullife.com>
Reviewed-by: Davidlohr Bueso <dbueso@suse.de>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Kees Cook <keescook@chromium.org>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Michal Hocko <mhocko@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'ipc/util.c')
| -rw-r--r-- | ipc/util.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/ipc/util.c b/ipc/util.c index 465bbd21d234..1d88dffd75e7 100644 --- a/ipc/util.c +++ b/ipc/util.c @@ -688,7 +688,7 @@ int ipc_update_perm(struct ipc64_perm *in, struct kern_ipc_perm *out) } /** - * ipcctl_pre_down_nolock - retrieve an ipc and check permissions for some IPC_XXX cmd + * ipcctl_obtain_check - retrieve an ipc object and check permissions * @ns: ipc namespace * @ids: the table of ids where to look for the ipc * @id: the id of the ipc to retrieve @@ -698,16 +698,16 @@ int ipc_update_perm(struct ipc64_perm *in, struct kern_ipc_perm *out) * * This function does some common audit and permissions check for some IPC_XXX * cmd and is called from semctl_down, shmctl_down and msgctl_down. - * It must be called without any lock held and: * - * - retrieves the ipc with the given id in the given table. + * It: + * - retrieves the ipc object with the given id in the given table. * - performs some audit and permission check, depending on the given cmd * - returns a pointer to the ipc object or otherwise, the corresponding * error. * * Call holding the both the rwsem and the rcu read lock. */ -struct kern_ipc_perm *ipcctl_pre_down_nolock(struct ipc_namespace *ns, +struct kern_ipc_perm *ipcctl_obtain_check(struct ipc_namespace *ns, struct ipc_ids *ids, int id, int cmd, struct ipc64_perm *perm, int extra_perm) { |