From 553f770ef71b27ee053bd241bef0998a15f43467 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Sat, 8 Jul 2017 22:52:47 -0400 Subject: ipc: move compat shmctl to native Signed-off-by: Al Viro --- ipc/compat.c | 233 +---------------------------------------------------------- 1 file changed, 3 insertions(+), 230 deletions(-) (limited to 'ipc/compat.c') diff --git a/ipc/compat.c b/ipc/compat.c index 9b3c85f8a538..fbfd6fb0a68d 100644 --- a/ipc/compat.c +++ b/ipc/compat.c @@ -39,16 +39,6 @@ struct compat_msgbuf { char mtext[1]; }; -struct compat_ipc_perm { - key_t key; - __compat_uid_t uid; - __compat_gid_t gid; - __compat_uid_t cuid; - __compat_gid_t cgid; - compat_mode_t mode; - unsigned short seq; -}; - struct compat_semid_ds { struct compat_ipc_perm sem_perm; compat_time_t sem_otime; @@ -76,44 +66,12 @@ struct compat_msqid_ds { compat_ipc_pid_t msg_lrpid; }; -struct compat_shmid_ds { - struct compat_ipc_perm shm_perm; - int shm_segsz; - compat_time_t shm_atime; - compat_time_t shm_dtime; - compat_time_t shm_ctime; - compat_ipc_pid_t shm_cpid; - compat_ipc_pid_t shm_lpid; - unsigned short shm_nattch; - unsigned short shm_unused; - compat_uptr_t shm_unused2; - compat_uptr_t shm_unused3; -}; - struct compat_ipc_kludge { compat_uptr_t msgp; compat_long_t msgtyp; }; -struct compat_shminfo64 { - compat_ulong_t shmmax; - compat_ulong_t shmmin; - compat_ulong_t shmmni; - compat_ulong_t shmseg; - compat_ulong_t shmall; - compat_ulong_t __unused1; - compat_ulong_t __unused2; - compat_ulong_t __unused3; - compat_ulong_t __unused4; -}; - -struct compat_shm_info { - compat_int_t used_ids; - compat_ulong_t shm_tot, shm_rss, shm_swp; - compat_ulong_t swap_attempts, swap_successes; -}; - -static inline int compat_ipc_parse_version(int *cmd) +static inline int __compat_ipc_parse_version(int *cmd) { #ifdef CONFIG_ARCH_WANT_COMPAT_IPC_PARSE_VERSION int version = *cmd & IPC_64; @@ -241,7 +199,7 @@ static long do_compat_semctl(int first, int second, int third, u32 pad) int err, err2; struct semid64_ds sem64; struct semid64_ds __user *up64; - int version = compat_ipc_parse_version(&third); + int version = __compat_ipc_parse_version(&third); memset(&sem64, 0, sizeof(sem64)); @@ -499,7 +457,7 @@ COMPAT_SYSCALL_DEFINE3(msgctl, int, first, int, second, void __user *, uptr) { int err, err2; struct msqid64_ds m64; - int version = compat_ipc_parse_version(&second); + int version = __compat_ipc_parse_version(&second); void __user *p; memset(&m64, 0, sizeof(m64)); @@ -561,191 +519,6 @@ COMPAT_SYSCALL_DEFINE3(shmat, int, shmid, compat_uptr_t, shmaddr, int, shmflg) return (long)ret; } -static inline int get_compat_shmid64_ds(struct shmid64_ds *sem64, - struct compat_shmid64_ds __user *up64) -{ - if (!access_ok(VERIFY_READ, up64, sizeof(*up64))) - return -EFAULT; - return __get_compat_ipc64_perm(&sem64->shm_perm, &up64->shm_perm); -} - -static inline int get_compat_shmid_ds(struct shmid64_ds *s, - struct compat_shmid_ds __user *up) -{ - if (!access_ok(VERIFY_READ, up, sizeof(*up))) - return -EFAULT; - return __get_compat_ipc_perm(&s->shm_perm, &up->shm_perm); -} - -static inline int put_compat_shmid64_ds(struct shmid64_ds *sem64, - struct compat_shmid64_ds __user *up64) -{ - int err; - - if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64))) - return -EFAULT; - err = __put_compat_ipc64_perm(&sem64->shm_perm, &up64->shm_perm); - err |= __put_user(sem64->shm_atime, &up64->shm_atime); - err |= __put_user(sem64->shm_dtime, &up64->shm_dtime); - err |= __put_user(sem64->shm_ctime, &up64->shm_ctime); - err |= __put_user(sem64->shm_segsz, &up64->shm_segsz); - err |= __put_user(sem64->shm_nattch, &up64->shm_nattch); - err |= __put_user(sem64->shm_cpid, &up64->shm_cpid); - err |= __put_user(sem64->shm_lpid, &up64->shm_lpid); - return err; -} - -static inline int put_compat_shmid_ds(struct shmid64_ds *s, - struct compat_shmid_ds __user *up) -{ - int err; - - if (!access_ok(VERIFY_WRITE, up, sizeof(*up))) - return -EFAULT; - err = __put_compat_ipc_perm(&s->shm_perm, &up->shm_perm); - err |= __put_user(s->shm_atime, &up->shm_atime); - err |= __put_user(s->shm_dtime, &up->shm_dtime); - err |= __put_user(s->shm_ctime, &up->shm_ctime); - err |= __put_user(s->shm_segsz, &up->shm_segsz); - err |= __put_user(s->shm_nattch, &up->shm_nattch); - err |= __put_user(s->shm_cpid, &up->shm_cpid); - err |= __put_user(s->shm_lpid, &up->shm_lpid); - return err; -} - -static inline int put_compat_shminfo64(struct shminfo64 *smi, - struct compat_shminfo64 __user *up64) -{ - int err; - - if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64))) - return -EFAULT; - if (smi->shmmax > INT_MAX) - smi->shmmax = INT_MAX; - err = __put_user(smi->shmmax, &up64->shmmax); - err |= __put_user(smi->shmmin, &up64->shmmin); - err |= __put_user(smi->shmmni, &up64->shmmni); - err |= __put_user(smi->shmseg, &up64->shmseg); - err |= __put_user(smi->shmall, &up64->shmall); - return err; -} - -static inline int put_compat_shminfo(struct shminfo64 *smi, - struct shminfo __user *up) -{ - int err; - - if (!access_ok(VERIFY_WRITE, up, sizeof(*up))) - return -EFAULT; - if (smi->shmmax > INT_MAX) - smi->shmmax = INT_MAX; - err = __put_user(smi->shmmax, &up->shmmax); - err |= __put_user(smi->shmmin, &up->shmmin); - err |= __put_user(smi->shmmni, &up->shmmni); - err |= __put_user(smi->shmseg, &up->shmseg); - err |= __put_user(smi->shmall, &up->shmall); - return err; -} - -static inline int put_compat_shm_info(struct shm_info __user *ip, - struct compat_shm_info __user *uip) -{ - int err; - struct shm_info si; - - if (!access_ok(VERIFY_WRITE, uip, sizeof(*uip)) || - copy_from_user(&si, ip, sizeof(si))) - return -EFAULT; - err = __put_user(si.used_ids, &uip->used_ids); - err |= __put_user(si.shm_tot, &uip->shm_tot); - err |= __put_user(si.shm_rss, &uip->shm_rss); - err |= __put_user(si.shm_swp, &uip->shm_swp); - err |= __put_user(si.swap_attempts, &uip->swap_attempts); - err |= __put_user(si.swap_successes, &uip->swap_successes); - return err; -} - -COMPAT_SYSCALL_DEFINE3(shmctl, int, first, int, second, void __user *, uptr) -{ - void __user *p; - struct shmid64_ds sem64; - struct shminfo64 smi; - int err, err2; - int version = compat_ipc_parse_version(&second); - - memset(&sem64, 0, sizeof(sem64)); - - switch (second & (~IPC_64)) { - case IPC_RMID: - case SHM_LOCK: - case SHM_UNLOCK: - err = sys_shmctl(first, second, uptr); - break; - - case IPC_INFO: - p = compat_alloc_user_space(sizeof(smi)); - err = sys_shmctl(first, second, p); - if (err < 0) - break; - if (copy_from_user(&smi, p, sizeof(smi))) - err2 = -EFAULT; - else if (version == IPC_64) - err2 = put_compat_shminfo64(&smi, uptr); - else - err2 = put_compat_shminfo(&smi, uptr); - if (err2) - err = -EFAULT; - break; - - - case IPC_SET: - if (version == IPC_64) - err = get_compat_shmid64_ds(&sem64, uptr); - else - err = get_compat_shmid_ds(&sem64, uptr); - - if (err) - break; - p = compat_alloc_user_space(sizeof(sem64)); - if (copy_to_user(p, &sem64, sizeof(sem64))) - err = -EFAULT; - else - err = sys_shmctl(first, second, p); - break; - - case IPC_STAT: - case SHM_STAT: - p = compat_alloc_user_space(sizeof(sem64)); - err = sys_shmctl(first, second, p); - if (err < 0) - break; - if (copy_from_user(&sem64, p, sizeof(sem64))) - err2 = -EFAULT; - else if (version == IPC_64) - err2 = put_compat_shmid64_ds(&sem64, uptr); - else - err2 = put_compat_shmid_ds(&sem64, uptr); - if (err2) - err = -EFAULT; - break; - - case SHM_INFO: - p = compat_alloc_user_space(sizeof(struct shm_info)); - err = sys_shmctl(first, second, p); - if (err < 0) - break; - err2 = put_compat_shm_info(p, uptr); - if (err2) - err = -EFAULT; - break; - - default: - err = -EINVAL; - break; - } - return err; -} - COMPAT_SYSCALL_DEFINE4(semtimedop, int, semid, struct sembuf __user *, tsems, unsigned, nsops, const struct compat_timespec __user *, timeout) -- cgit