From 4241c1a304078569f544d51eeaf8bc270b6e377a Mon Sep 17 00:00:00 2001 From: Manfred Spraul Date: Tue, 21 Aug 2018 22:01:34 -0700 Subject: 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 Reviewed-by: Davidlohr Bueso Cc: Davidlohr Bueso Cc: Dmitry Vyukov Cc: Herbert Xu Cc: Kees Cook Cc: Michael Kerrisk Cc: Michal Hocko Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- ipc/util.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'ipc/util.c') 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) { -- cgit v1.2.3-59-g8ed1b