From: Pierre Peiffer The IPC_SET command performs the same permission setting for all IPCs. This patch introduces a common ipc_update_perm() function to update these permissions and makes use of it for all IPCs. Signed-off-by: Pierre Peiffer Acked-by: Serge Hallyn --- ipc/msg.c | 5 +---- ipc/sem.c | 5 +---- ipc/shm.c | 5 +---- ipc/util.c | 13 +++++++++++++ ipc/util.h | 1 + 5 files changed, 17 insertions(+), 12 deletions(-) Index: b/ipc/msg.c =================================================================== --- a/ipc/msg.c +++ b/ipc/msg.c @@ -447,10 +447,7 @@ static int msgctl_down(struct ipc_namesp msq->q_qbytes = msqid64.msg_qbytes; - ipcp->uid = msqid64.msg_perm.uid; - ipcp->gid = msqid64.msg_perm.gid; - ipcp->mode = (ipcp->mode & ~S_IRWXUGO) | - (S_IRWXUGO & msqid64.msg_perm.mode); + ipc_update_perm(&msqid64.msg_perm, ipcp); msq->q_ctime = get_seconds(); /* sleeping receivers might be excluded by * stricter permissions. Index: b/ipc/sem.c =================================================================== --- a/ipc/sem.c +++ b/ipc/sem.c @@ -915,10 +915,7 @@ static int semctl_down(struct ipc_namesp freeary(ns, ipcp); goto out_up; case IPC_SET: - ipcp->uid = semid64.sem_perm.uid; - ipcp->gid = semid64.sem_perm.gid; - ipcp->mode = (ipcp->mode & ~S_IRWXUGO) - | (semid64.sem_perm.mode & S_IRWXUGO); + ipc_update_perm(&semid64.sem_perm, ipcp); sma->sem_ctime = get_seconds(); break; default: Index: b/ipc/shm.c =================================================================== --- a/ipc/shm.c +++ b/ipc/shm.c @@ -665,10 +665,7 @@ static int shmctl_down(struct ipc_namesp do_shm_rmid(ns, ipcp); goto out_up; case IPC_SET: - ipcp->uid = shmid64.shm_perm.uid; - ipcp->gid = shmid64.shm_perm.gid; - ipcp->mode = (ipcp->mode & ~S_IRWXUGO) - | (shmid64.shm_perm.mode & S_IRWXUGO); + ipc_update_perm(&shmid64.shm_perm, ipcp); shp->shm_ctim = get_seconds(); break; default: Index: b/ipc/util.c =================================================================== --- a/ipc/util.c +++ b/ipc/util.c @@ -761,6 +761,19 @@ int ipcget(struct ipc_namespace *ns, str return ipcget_public(ns, ids, ops, params); } +/** + * ipc_update_perm - update the permissions of an IPC. + * @in: the permission given as input. + * @out: the permission of the ipc to set. + */ +void ipc_update_perm(struct ipc64_perm *in, struct kern_ipc_perm *out) +{ + out->uid = in->uid; + out->gid = in->gid; + out->mode = (out->mode & ~S_IRWXUGO) + | (in->mode & S_IRWXUGO); +} + #ifdef __ARCH_WANT_IPC_PARSE_VERSION Index: b/ipc/util.h =================================================================== --- a/ipc/util.h +++ b/ipc/util.h @@ -112,6 +112,7 @@ struct kern_ipc_perm *ipc_lock(struct ip void kernel_to_ipc64_perm(struct kern_ipc_perm *in, struct ipc64_perm *out); void ipc64_perm_to_ipc_perm(struct ipc64_perm *in, struct ipc_perm *out); +void ipc_update_perm(struct ipc64_perm *in, struct kern_ipc_perm *out); #if defined(__ia64__) || defined(__x86_64__) || defined(__hppa__) || defined(__XTENSA__) /* On IA-64, we always use the "64-bit version" of the IPC structures. */ -- Pierre Peiffer -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/