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Diffstat (limited to 'ipc/compat.c')
-rw-r--r--ipc/compat.c233
1 files changed, 3 insertions, 230 deletions
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)

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