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authorAl Viro <viro@zeniv.linux.org.uk>2017-07-09 10:27:22 -0400
committerAl Viro <viro@zeniv.linux.org.uk>2017-07-15 20:46:45 -0400
commit20bc2a3aff5a88a666e81182fd277ea2a521fd3d (patch)
tree5834be6c2b551d9429c250b6c620f32dedb9ed0c /ipc
parent28327fae62b011216026b66299882c53b95b4500 (diff)
download96b-common-20bc2a3aff5a88a666e81182fd277ea2a521fd3d.tar.gz
ipc(2): move compat to native
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'ipc')
-rw-r--r--ipc/compat.c98
-rw-r--r--ipc/syscall.c90
2 files changed, 93 insertions, 95 deletions
diff --git a/ipc/compat.c b/ipc/compat.c
index 3c25ca1e46c7..00c2e3beccc8 100644
--- a/ipc/compat.c
+++ b/ipc/compat.c
@@ -39,11 +39,6 @@ struct compat_msgbuf {
char mtext[1];
};
-struct compat_ipc_kludge {
- compat_uptr_t msgp;
- compat_long_t msgtyp;
-};
-
int get_compat_ipc64_perm(struct ipc64_perm *to,
struct compat_ipc64_perm __user *from)
{
@@ -104,95 +99,6 @@ static long compat_do_msg_fill(void __user *dest, struct msg_msg *msg, size_t bu
return msgsz;
}
-#ifndef COMPAT_SHMLBA
-#define COMPAT_SHMLBA SHMLBA
-#endif
-
-#ifdef CONFIG_ARCH_WANT_OLD_COMPAT_IPC
-COMPAT_SYSCALL_DEFINE6(ipc, u32, call, int, first, int, second,
- u32, third, compat_uptr_t, ptr, u32, fifth)
-{
- int version;
- u32 pad;
-
- version = call >> 16; /* hack for backward compatibility */
- call &= 0xffff;
-
- switch (call) {
- case SEMOP:
- /* struct sembuf is the same on 32 and 64bit :)) */
- return sys_semtimedop(first, compat_ptr(ptr), second, NULL);
- case SEMTIMEDOP:
- return compat_sys_semtimedop(first, compat_ptr(ptr), second,
- compat_ptr(fifth));
- case SEMGET:
- return sys_semget(first, second, third);
- case SEMCTL:
- if (!ptr)
- return -EINVAL;
- if (get_user(pad, (u32 __user *) compat_ptr(ptr)))
- return -EFAULT;
- return compat_sys_semctl(first, second, third, pad);
-
- case MSGSND: {
- struct compat_msgbuf __user *up = compat_ptr(ptr);
- compat_long_t type;
-
- if (first < 0 || second < 0)
- return -EINVAL;
-
- if (get_user(type, &up->mtype))
- return -EFAULT;
-
- return do_msgsnd(first, type, up->mtext, second, third);
- }
- case MSGRCV: {
- void __user *uptr = compat_ptr(ptr);
-
- if (first < 0 || second < 0)
- return -EINVAL;
-
- if (!version) {
- struct compat_ipc_kludge ipck;
- if (!uptr)
- return -EINVAL;
- if (copy_from_user(&ipck, uptr, sizeof(ipck)))
- return -EFAULT;
- uptr = compat_ptr(ipck.msgp);
- fifth = ipck.msgtyp;
- }
- return do_msgrcv(first, uptr, second, (s32)fifth, third,
- compat_do_msg_fill);
- }
- case MSGGET:
- return sys_msgget(first, second);
- case MSGCTL:
- return compat_sys_msgctl(first, second, compat_ptr(ptr));
-
- case SHMAT: {
- int err;
- unsigned long raddr;
-
- if (version == 1)
- return -EINVAL;
- err = do_shmat(first, compat_ptr(ptr), second, &raddr,
- COMPAT_SHMLBA);
- if (err < 0)
- return err;
- return put_user(raddr, (compat_ulong_t *)compat_ptr(third));
- }
- case SHMDT:
- return sys_shmdt(compat_ptr(ptr));
- case SHMGET:
- return sys_shmget(first, (unsigned)second, third);
- case SHMCTL:
- return compat_sys_shmctl(first, second, compat_ptr(ptr));
- }
-
- return -ENOSYS;
-}
-#endif
-
COMPAT_SYSCALL_DEFINE4(msgsnd, int, msqid, compat_uptr_t, msgp,
compat_ssize_t, msgsz, int, msgflg)
{
@@ -211,6 +117,10 @@ COMPAT_SYSCALL_DEFINE5(msgrcv, int, msqid, compat_uptr_t, msgp,
msgflg, compat_do_msg_fill);
}
+#ifndef COMPAT_SHMLBA
+#define COMPAT_SHMLBA SHMLBA
+#endif
+
COMPAT_SYSCALL_DEFINE3(shmat, int, shmid, compat_uptr_t, shmaddr, int, shmflg)
{
unsigned long ret;
diff --git a/ipc/syscall.c b/ipc/syscall.c
index 52429489cde0..667022746ca5 100644
--- a/ipc/syscall.c
+++ b/ipc/syscall.c
@@ -5,12 +5,12 @@
* the individual syscalls instead.
*/
#include <linux/unistd.h>
+#include <linux/syscalls.h>
#ifdef __ARCH_WANT_SYS_IPC
#include <linux/errno.h>
#include <linux/ipc.h>
#include <linux/shm.h>
-#include <linux/syscalls.h>
#include <linux/uaccess.h>
SYSCALL_DEFINE6(ipc, unsigned int, call, int, first, unsigned long, second,
@@ -97,3 +97,91 @@ SYSCALL_DEFINE6(ipc, unsigned int, call, int, first, unsigned long, second,
}
}
#endif
+
+#ifdef CONFIG_COMPAT
+#include <linux/compat.h>
+
+#ifndef COMPAT_SHMLBA
+#define COMPAT_SHMLBA SHMLBA
+#endif
+
+struct compat_ipc_kludge {
+ compat_uptr_t msgp;
+ compat_long_t msgtyp;
+};
+
+#ifdef CONFIG_ARCH_WANT_OLD_COMPAT_IPC
+COMPAT_SYSCALL_DEFINE6(ipc, u32, call, int, first, int, second,
+ u32, third, compat_uptr_t, ptr, u32, fifth)
+{
+ int version;
+ u32 pad;
+
+ version = call >> 16; /* hack for backward compatibility */
+ call &= 0xffff;
+
+ switch (call) {
+ case SEMOP:
+ /* struct sembuf is the same on 32 and 64bit :)) */
+ return sys_semtimedop(first, compat_ptr(ptr), second, NULL);
+ case SEMTIMEDOP:
+ return compat_sys_semtimedop(first, compat_ptr(ptr), second,
+ compat_ptr(fifth));
+ case SEMGET:
+ return sys_semget(first, second, third);
+ case SEMCTL:
+ if (!ptr)
+ return -EINVAL;
+ if (get_user(pad, (u32 __user *) compat_ptr(ptr)))
+ return -EFAULT;
+ return compat_sys_semctl(first, second, third, pad);
+
+ case MSGSND:
+ return compat_sys_msgsnd(first, ptr, second, third);
+
+ case MSGRCV: {
+ void __user *uptr = compat_ptr(ptr);
+
+ if (first < 0 || second < 0)
+ return -EINVAL;
+
+ if (!version) {
+ struct compat_ipc_kludge ipck;
+ if (!uptr)
+ return -EINVAL;
+ if (copy_from_user(&ipck, uptr, sizeof(ipck)))
+ return -EFAULT;
+ return compat_sys_msgrcv(first, ipck.msgp, second,
+ ipck.msgtyp, third);
+ }
+ return compat_sys_msgrcv(first, ptr, second, fifth, third);
+ }
+ case MSGGET:
+ return sys_msgget(first, second);
+ case MSGCTL:
+ return compat_sys_msgctl(first, second, compat_ptr(ptr));
+
+ case SHMAT: {
+ int err;
+ unsigned long raddr;
+
+ if (version == 1)
+ return -EINVAL;
+ err = do_shmat(first, compat_ptr(ptr), second, &raddr,
+ COMPAT_SHMLBA);
+ if (err < 0)
+ return err;
+ return put_user(raddr, (compat_ulong_t *)compat_ptr(third));
+ }
+ case SHMDT:
+ return sys_shmdt(compat_ptr(ptr));
+ case SHMGET:
+ return sys_shmget(first, (unsigned)second, third);
+ case SHMCTL:
+ return compat_sys_shmctl(first, second, compat_ptr(ptr));
+ }
+
+ return -ENOSYS;
+}
+#endif
+#endif