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authorAl Viro <viro@zeniv.linux.org.uk>2017-07-09 10:34:35 -0400
committerAl Viro <viro@zeniv.linux.org.uk>2017-07-15 20:46:46 -0400
commit9b1404c24a357332cb2a6df7c4337e943a4545fd (patch)
treed69d1b464c5f2ba3d4a25f1f4ab5c6ec62b03252 /ipc
parent20bc2a3aff5a88a666e81182fd277ea2a521fd3d (diff)
download96b-common-9b1404c24a357332cb2a6df7c4337e943a4545fd.tar.gz
msgrcv(2), msgsnd(2): move compat to native
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'ipc')
-rw-r--r--ipc/compat.c37
-rw-r--r--ipc/msg.c45
2 files changed, 43 insertions, 39 deletions
diff --git a/ipc/compat.c b/ipc/compat.c
index 00c2e3beccc8..0586687c3e31 100644
--- a/ipc/compat.c
+++ b/ipc/compat.c
@@ -34,11 +34,6 @@
#include "util.h"
-struct compat_msgbuf {
- compat_long_t mtype;
- char mtext[1];
-};
-
int get_compat_ipc64_perm(struct ipc64_perm *to,
struct compat_ipc64_perm __user *from)
{
@@ -85,38 +80,6 @@ void to_compat_ipc_perm(struct compat_ipc_perm *to, struct ipc64_perm *from)
to->seq = from->seq;
}
-static long compat_do_msg_fill(void __user *dest, struct msg_msg *msg, size_t bufsz)
-{
- struct compat_msgbuf __user *msgp = dest;
- size_t msgsz;
-
- if (put_user(msg->m_type, &msgp->mtype))
- return -EFAULT;
-
- msgsz = (bufsz > msg->m_ts) ? msg->m_ts : bufsz;
- if (store_msg(msgp->mtext, msg, msgsz))
- return -EFAULT;
- return msgsz;
-}
-
-COMPAT_SYSCALL_DEFINE4(msgsnd, int, msqid, compat_uptr_t, msgp,
- compat_ssize_t, msgsz, int, msgflg)
-{
- struct compat_msgbuf __user *up = compat_ptr(msgp);
- compat_long_t mtype;
-
- if (get_user(mtype, &up->mtype))
- return -EFAULT;
- return do_msgsnd(msqid, mtype, up->mtext, (ssize_t)msgsz, msgflg);
-}
-
-COMPAT_SYSCALL_DEFINE5(msgrcv, int, msqid, compat_uptr_t, msgp,
- compat_ssize_t, msgsz, compat_long_t, msgtyp, int, msgflg)
-{
- return do_msgrcv(msqid, compat_ptr(msgp), (ssize_t)msgsz, (long)msgtyp,
- msgflg, compat_do_msg_fill);
-}
-
#ifndef COMPAT_SHMLBA
#define COMPAT_SHMLBA SHMLBA
#endif
diff --git a/ipc/msg.c b/ipc/msg.c
index 94690fb53f66..855da19c765a 100644
--- a/ipc/msg.c
+++ b/ipc/msg.c
@@ -730,7 +730,7 @@ static inline int pipelined_send(struct msg_queue *msq, struct msg_msg *msg,
return 0;
}
-long do_msgsnd(int msqid, long mtype, void __user *mtext,
+static long do_msgsnd(int msqid, long mtype, void __user *mtext,
size_t msgsz, int msgflg)
{
struct msg_queue *msq;
@@ -853,6 +853,25 @@ SYSCALL_DEFINE4(msgsnd, int, msqid, struct msgbuf __user *, msgp, size_t, msgsz,
return do_msgsnd(msqid, mtype, msgp->mtext, msgsz, msgflg);
}
+#ifdef CONFIG_COMPAT
+
+struct compat_msgbuf {
+ compat_long_t mtype;
+ char mtext[1];
+};
+
+COMPAT_SYSCALL_DEFINE4(msgsnd, int, msqid, compat_uptr_t, msgp,
+ compat_ssize_t, msgsz, int, msgflg)
+{
+ struct compat_msgbuf __user *up = compat_ptr(msgp);
+ compat_long_t mtype;
+
+ if (get_user(mtype, &up->mtype))
+ return -EFAULT;
+ return do_msgsnd(msqid, mtype, up->mtext, (ssize_t)msgsz, msgflg);
+}
+#endif
+
static inline int convert_mode(long *msgtyp, int msgflg)
{
if (msgflg & MSG_COPY)
@@ -949,7 +968,7 @@ static struct msg_msg *find_msg(struct msg_queue *msq, long *msgtyp, int mode)
return found ?: ERR_PTR(-EAGAIN);
}
-long do_msgrcv(int msqid, void __user *buf, size_t bufsz, long msgtyp, int msgflg,
+static long do_msgrcv(int msqid, void __user *buf, size_t bufsz, long msgtyp, int msgflg,
long (*msg_handler)(void __user *, struct msg_msg *, size_t))
{
int mode;
@@ -1113,6 +1132,28 @@ SYSCALL_DEFINE5(msgrcv, int, msqid, struct msgbuf __user *, msgp, size_t, msgsz,
return do_msgrcv(msqid, msgp, msgsz, msgtyp, msgflg, do_msg_fill);
}
+#ifdef CONFIG_COMPAT
+static long compat_do_msg_fill(void __user *dest, struct msg_msg *msg, size_t bufsz)
+{
+ struct compat_msgbuf __user *msgp = dest;
+ size_t msgsz;
+
+ if (put_user(msg->m_type, &msgp->mtype))
+ return -EFAULT;
+
+ msgsz = (bufsz > msg->m_ts) ? msg->m_ts : bufsz;
+ if (store_msg(msgp->mtext, msg, msgsz))
+ return -EFAULT;
+ return msgsz;
+}
+
+COMPAT_SYSCALL_DEFINE5(msgrcv, int, msqid, compat_uptr_t, msgp,
+ compat_ssize_t, msgsz, compat_long_t, msgtyp, int, msgflg)
+{
+ return do_msgrcv(msqid, compat_ptr(msgp), (ssize_t)msgsz, (long)msgtyp,
+ msgflg, compat_do_msg_fill);
+}
+#endif
void msg_init_ns(struct ipc_namespace *ns)
{