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author | Al Viro <viro@zeniv.linux.org.uk> | 2017-07-09 08:31:16 -0400 |
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committer | Al Viro <viro@zeniv.linux.org.uk> | 2017-07-15 20:46:43 -0400 |
commit | 4693916846269d633a3664586650dbfac2c5562f (patch) | |
tree | e7dd196843fc6af4a67b20588403dd696e5262e9 /ipc/compat.c | |
parent | 156d9ed1260ee566f2be09c13254b58247edfb29 (diff) | |
download | lwn-4693916846269d633a3664586650dbfac2c5562f.tar.gz lwn-4693916846269d633a3664586650dbfac2c5562f.zip |
msgctl(): move compat to native
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'ipc/compat.c')
-rw-r--r-- | ipc/compat.c | 132 |
1 files changed, 0 insertions, 132 deletions
diff --git a/ipc/compat.c b/ipc/compat.c index fbfd6fb0a68d..c83099a3b265 100644 --- a/ipc/compat.c +++ b/ipc/compat.c @@ -50,22 +50,6 @@ struct compat_semid_ds { unsigned short sem_nsems; }; -struct compat_msqid_ds { - struct compat_ipc_perm msg_perm; - compat_uptr_t msg_first; - compat_uptr_t msg_last; - compat_time_t msg_stime; - compat_time_t msg_rtime; - compat_time_t msg_ctime; - compat_ulong_t msg_lcbytes; - compat_ulong_t msg_lqbytes; - unsigned short msg_cbytes; - unsigned short msg_qnum; - unsigned short msg_qbytes; - compat_ipc_pid_t msg_lspid; - compat_ipc_pid_t msg_lrpid; -}; - struct compat_ipc_kludge { compat_uptr_t msgp; compat_long_t msgtyp; @@ -391,122 +375,6 @@ COMPAT_SYSCALL_DEFINE5(msgrcv, int, msqid, compat_uptr_t, msgp, msgflg, compat_do_msg_fill); } -static inline int get_compat_msqid64(struct msqid64_ds *m64, - struct compat_msqid64_ds __user *up64) -{ - int err; - - if (!access_ok(VERIFY_READ, up64, sizeof(*up64))) - return -EFAULT; - err = __get_compat_ipc64_perm(&m64->msg_perm, &up64->msg_perm); - err |= __get_user(m64->msg_qbytes, &up64->msg_qbytes); - return err; -} - -static inline int get_compat_msqid(struct msqid64_ds *m, - struct compat_msqid_ds __user *up) -{ - int err; - - if (!access_ok(VERIFY_READ, up, sizeof(*up))) - return -EFAULT; - err = __get_compat_ipc_perm(&m->msg_perm, &up->msg_perm); - err |= __get_user(m->msg_qbytes, &up->msg_qbytes); - return err; -} - -static inline int put_compat_msqid64_ds(struct msqid64_ds *m64, - struct compat_msqid64_ds __user *up64) -{ - int err; - - if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64))) - return -EFAULT; - err = __put_compat_ipc64_perm(&m64->msg_perm, &up64->msg_perm); - err |= __put_user(m64->msg_stime, &up64->msg_stime); - err |= __put_user(m64->msg_rtime, &up64->msg_rtime); - err |= __put_user(m64->msg_ctime, &up64->msg_ctime); - err |= __put_user(m64->msg_cbytes, &up64->msg_cbytes); - err |= __put_user(m64->msg_qnum, &up64->msg_qnum); - err |= __put_user(m64->msg_qbytes, &up64->msg_qbytes); - err |= __put_user(m64->msg_lspid, &up64->msg_lspid); - err |= __put_user(m64->msg_lrpid, &up64->msg_lrpid); - return err; -} - -static inline int put_compat_msqid_ds(struct msqid64_ds *m, - struct compat_msqid_ds __user *up) -{ - int err; - - if (!access_ok(VERIFY_WRITE, up, sizeof(*up))) - return -EFAULT; - err = __put_compat_ipc_perm(&m->msg_perm, &up->msg_perm); - err |= __put_user(m->msg_stime, &up->msg_stime); - err |= __put_user(m->msg_rtime, &up->msg_rtime); - err |= __put_user(m->msg_ctime, &up->msg_ctime); - err |= __put_user(m->msg_cbytes, &up->msg_cbytes); - err |= __put_user(m->msg_qnum, &up->msg_qnum); - err |= __put_user(m->msg_qbytes, &up->msg_qbytes); - err |= __put_user(m->msg_lspid, &up->msg_lspid); - err |= __put_user(m->msg_lrpid, &up->msg_lrpid); - return err; -} - -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); - void __user *p; - - memset(&m64, 0, sizeof(m64)); - - switch (second & (~IPC_64)) { - case IPC_INFO: - case IPC_RMID: - case MSG_INFO: - err = sys_msgctl(first, second, uptr); - break; - - case IPC_SET: - if (version == IPC_64) - err = get_compat_msqid64(&m64, uptr); - else - err = get_compat_msqid(&m64, uptr); - - if (err) - break; - p = compat_alloc_user_space(sizeof(m64)); - if (copy_to_user(p, &m64, sizeof(m64))) - err = -EFAULT; - else - err = sys_msgctl(first, second, p); - break; - - case IPC_STAT: - case MSG_STAT: - p = compat_alloc_user_space(sizeof(m64)); - err = sys_msgctl(first, second, p); - if (err < 0) - break; - if (copy_from_user(&m64, p, sizeof(m64))) - err2 = -EFAULT; - else if (version == IPC_64) - err2 = put_compat_msqid64_ds(&m64, uptr); - else - err2 = put_compat_msqid_ds(&m64, uptr); - if (err2) - err = -EFAULT; - break; - - default: - err = -EINVAL; - break; - } - return err; -} - COMPAT_SYSCALL_DEFINE3(shmat, int, shmid, compat_uptr_t, shmaddr, int, shmflg) { unsigned long ret; |