net: Add sendmmsg socket system call
This patch adds a multiple message send syscall and is the send
version of the existing recvmmsg syscall. This is heavily
based on the patch by Arnaldo that added recvmmsg.
I wrote a microbenchmark to test the performance gains of using
this new syscall:
http://ozlabs.org/~anton/junkcode/sendmmsg_test.c
The test was run on a ppc64 box with a 10 Gbit network card. The
benchmark can send both UDP and RAW ethernet packets.
64B UDP
batch pkts/sec
1 804570
2 872800 (+ 8 %)
4 916556 (+14 %)
8 939712 (+17 %)
16 952688 (+18 %)
32 956448 (+19 %)
64 964800 (+20 %)
64B raw socket
batch pkts/sec
1 1201449
2 1350028 (+12 %)
4 1461416 (+22 %)
8 1513080 (+26 %)
16 1541216 (+28 %)
32 1553440 (+29 %)
64 1557888 (+30 %)
We see a 20% improvement in throughput on UDP send and 30%
on raw socket send.
[ Add sparc syscall entries. -DaveM ]
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Anton Blanchard
David S. Miller
Родитель
1c5cae815d
Коммит
228e548e60
|
|
@ -352,3 +352,4 @@ SYSCALL_SPU(name_to_handle_at)
|
|||
COMPAT_SYS_SPU(open_by_handle_at)
|
||||
COMPAT_SYS_SPU(clock_adjtime)
|
||||
SYSCALL_SPU(syncfs)
|
||||
COMPAT_SYS_SPU(sendmmsg)
|
||||
|
|
|
|||
|
|
@ -371,10 +371,11 @@
|
|||
#define __NR_open_by_handle_at 346
|
||||
#define __NR_clock_adjtime 347
|
||||
#define __NR_syncfs 348
|
||||
#define __NR_sendmmsg 349
|
||||
|
||||
#ifdef __KERNEL__
|
||||
|
||||
#define __NR_syscalls 349
|
||||
#define __NR_syscalls 350
|
||||
|
||||
#define __NR__exit __NR_exit
|
||||
#define NR_syscalls __NR_syscalls
|
||||
|
|
|
|||
|
|
@ -404,8 +404,9 @@
|
|||
#define __NR_open_by_handle_at 333
|
||||
#define __NR_clock_adjtime 334
|
||||
#define __NR_syncfs 335
|
||||
#define __NR_sendmmsg 336
|
||||
|
||||
#define NR_syscalls 336
|
||||
#define NR_syscalls 337
|
||||
|
||||
#ifdef __32bit_syscall_numbers__
|
||||
/* Sparc 32-bit only has the "setresuid32", "getresuid32" variants,
|
||||
|
|
|
|||
|
|
@ -84,4 +84,4 @@ sys_call_table:
|
|||
/*320*/ .long sys_dup3, sys_pipe2, sys_inotify_init1, sys_accept4, sys_preadv
|
||||
/*325*/ .long sys_pwritev, sys_rt_tgsigqueueinfo, sys_perf_event_open, sys_recvmmsg, sys_fanotify_init
|
||||
/*330*/ .long sys_fanotify_mark, sys_prlimit64, sys_name_to_handle_at, sys_open_by_handle_at, sys_clock_adjtime
|
||||
/*335*/ .long sys_syncfs
|
||||
/*335*/ .long sys_syncfs, sys_sendmmsg
|
||||
|
|
|
|||
|
|
@ -85,7 +85,7 @@ sys_call_table32:
|
|||
/*320*/ .word sys_dup3, sys_pipe2, sys_inotify_init1, sys_accept4, compat_sys_preadv
|
||||
.word compat_sys_pwritev, compat_sys_rt_tgsigqueueinfo, sys_perf_event_open, compat_sys_recvmmsg, sys_fanotify_init
|
||||
/*330*/ .word sys32_fanotify_mark, sys_prlimit64, sys_name_to_handle_at, compat_sys_open_by_handle_at, compat_sys_clock_adjtime
|
||||
.word sys_syncfs
|
||||
.word sys_syncfs, compat_sys_sendmmsg
|
||||
|
||||
#endif /* CONFIG_COMPAT */
|
||||
|
||||
|
|
@ -162,4 +162,4 @@ sys_call_table:
|
|||
/*320*/ .word sys_dup3, sys_pipe2, sys_inotify_init1, sys_accept4, sys_preadv
|
||||
.word sys_pwritev, sys_rt_tgsigqueueinfo, sys_perf_event_open, sys_recvmmsg, sys_fanotify_init
|
||||
/*330*/ .word sys_fanotify_mark, sys_prlimit64, sys_name_to_handle_at, sys_open_by_handle_at, sys_clock_adjtime
|
||||
.word sys_syncfs
|
||||
.word sys_syncfs, sys_sendmmsg
|
||||
|
|
|
|||
|
|
@ -848,4 +848,5 @@ ia32_sys_call_table:
|
|||
.quad compat_sys_open_by_handle_at
|
||||
.quad compat_sys_clock_adjtime
|
||||
.quad sys_syncfs
|
||||
.quad compat_sys_sendmmsg /* 345 */
|
||||
ia32_syscall_end:
|
||||
|
|
|
|||
|
|
@ -350,10 +350,11 @@
|
|||
#define __NR_open_by_handle_at 342
|
||||
#define __NR_clock_adjtime 343
|
||||
#define __NR_syncfs 344
|
||||
#define __NR_sendmmsg 345
|
||||
|
||||
#ifdef __KERNEL__
|
||||
|
||||
#define NR_syscalls 345
|
||||
#define NR_syscalls 346
|
||||
|
||||
#define __ARCH_WANT_IPC_PARSE_VERSION
|
||||
#define __ARCH_WANT_OLD_READDIR
|
||||
|
|
|
|||
|
|
@ -677,6 +677,8 @@ __SYSCALL(__NR_open_by_handle_at, sys_open_by_handle_at)
|
|||
__SYSCALL(__NR_clock_adjtime, sys_clock_adjtime)
|
||||
#define __NR_syncfs 306
|
||||
__SYSCALL(__NR_syncfs, sys_syncfs)
|
||||
#define __NR_sendmmsg 307
|
||||
__SYSCALL(__NR_sendmmsg, sys_sendmmsg)
|
||||
|
||||
#ifndef __NO_STUBS
|
||||
#define __ARCH_WANT_OLD_READDIR
|
||||
|
|
|
|||
|
|
@ -344,3 +344,4 @@ ENTRY(sys_call_table)
|
|||
.long sys_open_by_handle_at
|
||||
.long sys_clock_adjtime
|
||||
.long sys_syncfs
|
||||
.long sys_sendmmsg /* 345 */
|
||||
|
|
|
|||
|
|
@ -42,6 +42,7 @@
|
|||
#define SYS_RECVMSG 17 /* sys_recvmsg(2) */
|
||||
#define SYS_ACCEPT4 18 /* sys_accept4(2) */
|
||||
#define SYS_RECVMMSG 19 /* sys_recvmmsg(2) */
|
||||
#define SYS_SENDMMSG 20 /* sys_sendmmsg(2) */
|
||||
|
||||
typedef enum {
|
||||
SS_FREE = 0, /* not allocated */
|
||||
|
|
|
|||
|
|
@ -333,5 +333,7 @@ struct timespec;
|
|||
|
||||
extern int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen,
|
||||
unsigned int flags, struct timespec *timeout);
|
||||
extern int __sys_sendmmsg(int fd, struct mmsghdr __user *mmsg,
|
||||
unsigned int vlen, unsigned int flags);
|
||||
#endif /* not kernel and not glibc */
|
||||
#endif /* _LINUX_SOCKET_H */
|
||||
|
|
|
|||
|
|
@ -610,6 +610,8 @@ asmlinkage long sys_send(int, void __user *, size_t, unsigned);
|
|||
asmlinkage long sys_sendto(int, void __user *, size_t, unsigned,
|
||||
struct sockaddr __user *, int);
|
||||
asmlinkage long sys_sendmsg(int fd, struct msghdr __user *msg, unsigned flags);
|
||||
asmlinkage long sys_sendmmsg(int fd, struct mmsghdr __user *msg,
|
||||
unsigned int vlen, unsigned flags);
|
||||
asmlinkage long sys_recv(int, void __user *, size_t, unsigned);
|
||||
asmlinkage long sys_recvfrom(int, void __user *, size_t, unsigned,
|
||||
struct sockaddr __user *, int __user *);
|
||||
|
|
|
|||
|
|
@ -43,6 +43,8 @@ extern int compat_sock_get_timestampns(struct sock *, struct timespec __user *);
|
|||
extern int get_compat_msghdr(struct msghdr *, struct compat_msghdr __user *);
|
||||
extern int verify_compat_iovec(struct msghdr *, struct iovec *, struct sockaddr *, int);
|
||||
extern asmlinkage long compat_sys_sendmsg(int,struct compat_msghdr __user *,unsigned);
|
||||
extern asmlinkage long compat_sys_sendmmsg(int, struct compat_mmsghdr __user *,
|
||||
unsigned, unsigned);
|
||||
extern asmlinkage long compat_sys_recvmsg(int,struct compat_msghdr __user *,unsigned);
|
||||
extern asmlinkage long compat_sys_recvmmsg(int, struct compat_mmsghdr __user *,
|
||||
unsigned, unsigned,
|
||||
|
|
|
|||
|
|
@ -46,7 +46,9 @@ cond_syscall(sys_getsockopt);
|
|||
cond_syscall(compat_sys_getsockopt);
|
||||
cond_syscall(sys_shutdown);
|
||||
cond_syscall(sys_sendmsg);
|
||||
cond_syscall(sys_sendmmsg);
|
||||
cond_syscall(compat_sys_sendmsg);
|
||||
cond_syscall(compat_sys_sendmmsg);
|
||||
cond_syscall(sys_recvmsg);
|
||||
cond_syscall(sys_recvmmsg);
|
||||
cond_syscall(compat_sys_recvmsg);
|
||||
|
|
|
|||
16
net/compat.c
16
net/compat.c
|
|
@ -722,11 +722,11 @@ EXPORT_SYMBOL(compat_mc_getsockopt);
|
|||
|
||||
/* Argument list sizes for compat_sys_socketcall */
|
||||
#define AL(x) ((x) * sizeof(u32))
|
||||
static unsigned char nas[20] = {
|
||||
static unsigned char nas[21] = {
|
||||
AL(0), AL(3), AL(3), AL(3), AL(2), AL(3),
|
||||
AL(3), AL(3), AL(4), AL(4), AL(4), AL(6),
|
||||
AL(6), AL(2), AL(5), AL(5), AL(3), AL(3),
|
||||
AL(4), AL(5)
|
||||
AL(4), AL(5), AL(4)
|
||||
};
|
||||
#undef AL
|
||||
|
||||
|
|
@ -735,6 +735,13 @@ asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg, uns
|
|||
return sys_sendmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT);
|
||||
}
|
||||
|
||||
asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg,
|
||||
unsigned vlen, unsigned int flags)
|
||||
{
|
||||
return __sys_sendmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
|
||||
flags | MSG_CMSG_COMPAT);
|
||||
}
|
||||
|
||||
asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg, unsigned int flags)
|
||||
{
|
||||
return sys_recvmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT);
|
||||
|
|
@ -780,7 +787,7 @@ asmlinkage long compat_sys_socketcall(int call, u32 __user *args)
|
|||
u32 a[6];
|
||||
u32 a0, a1;
|
||||
|
||||
if (call < SYS_SOCKET || call > SYS_RECVMMSG)
|
||||
if (call < SYS_SOCKET || call > SYS_SENDMMSG)
|
||||
return -EINVAL;
|
||||
if (copy_from_user(a, args, nas[call]))
|
||||
return -EFAULT;
|
||||
|
|
@ -839,6 +846,9 @@ asmlinkage long compat_sys_socketcall(int call, u32 __user *args)
|
|||
case SYS_SENDMSG:
|
||||
ret = compat_sys_sendmsg(a0, compat_ptr(a1), a[2]);
|
||||
break;
|
||||
case SYS_SENDMMSG:
|
||||
ret = compat_sys_sendmmsg(a0, compat_ptr(a1), a[2], a[3]);
|
||||
break;
|
||||
case SYS_RECVMSG:
|
||||
ret = compat_sys_recvmsg(a0, compat_ptr(a1), a[2]);
|
||||
break;
|
||||
|
|
|
|||
199
net/socket.c
199
net/socket.c
|
|
@ -551,11 +551,10 @@ int sock_tx_timestamp(struct sock *sk, __u8 *tx_flags)
|
|||
}
|
||||
EXPORT_SYMBOL(sock_tx_timestamp);
|
||||
|
||||
static inline int __sock_sendmsg(struct kiocb *iocb, struct socket *sock,
|
||||
struct msghdr *msg, size_t size)
|
||||
static inline int __sock_sendmsg_nosec(struct kiocb *iocb, struct socket *sock,
|
||||
struct msghdr *msg, size_t size)
|
||||
{
|
||||
struct sock_iocb *si = kiocb_to_siocb(iocb);
|
||||
int err;
|
||||
|
||||
sock_update_classid(sock->sk);
|
||||
|
||||
|
|
@ -564,13 +563,17 @@ static inline int __sock_sendmsg(struct kiocb *iocb, struct socket *sock,
|
|||
si->msg = msg;
|
||||
si->size = size;
|
||||
|
||||
err = security_socket_sendmsg(sock, msg, size);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
return sock->ops->sendmsg(iocb, sock, msg, size);
|
||||
}
|
||||
|
||||
static inline int __sock_sendmsg(struct kiocb *iocb, struct socket *sock,
|
||||
struct msghdr *msg, size_t size)
|
||||
{
|
||||
int err = security_socket_sendmsg(sock, msg, size);
|
||||
|
||||
return err ?: __sock_sendmsg_nosec(iocb, sock, msg, size);
|
||||
}
|
||||
|
||||
int sock_sendmsg(struct socket *sock, struct msghdr *msg, size_t size)
|
||||
{
|
||||
struct kiocb iocb;
|
||||
|
|
@ -586,6 +589,20 @@ int sock_sendmsg(struct socket *sock, struct msghdr *msg, size_t size)
|
|||
}
|
||||
EXPORT_SYMBOL(sock_sendmsg);
|
||||
|
||||
int sock_sendmsg_nosec(struct socket *sock, struct msghdr *msg, size_t size)
|
||||
{
|
||||
struct kiocb iocb;
|
||||
struct sock_iocb siocb;
|
||||
int ret;
|
||||
|
||||
init_sync_kiocb(&iocb, NULL);
|
||||
iocb.private = &siocb;
|
||||
ret = __sock_sendmsg_nosec(&iocb, sock, msg, size);
|
||||
if (-EIOCBQUEUED == ret)
|
||||
ret = wait_on_sync_kiocb(&iocb);
|
||||
return ret;
|
||||
}
|
||||
|
||||
int kernel_sendmsg(struct socket *sock, struct msghdr *msg,
|
||||
struct kvec *vec, size_t num, size_t size)
|
||||
{
|
||||
|
|
@ -1863,57 +1880,47 @@ SYSCALL_DEFINE2(shutdown, int, fd, int, how)
|
|||
#define COMPAT_NAMELEN(msg) COMPAT_MSG(msg, msg_namelen)
|
||||
#define COMPAT_FLAGS(msg) COMPAT_MSG(msg, msg_flags)
|
||||
|
||||
/*
|
||||
* BSD sendmsg interface
|
||||
*/
|
||||
|
||||
SYSCALL_DEFINE3(sendmsg, int, fd, struct msghdr __user *, msg, unsigned, flags)
|
||||
static int __sys_sendmsg(struct socket *sock, struct msghdr __user *msg,
|
||||
struct msghdr *msg_sys, unsigned flags, int nosec)
|
||||
{
|
||||
struct compat_msghdr __user *msg_compat =
|
||||
(struct compat_msghdr __user *)msg;
|
||||
struct socket *sock;
|
||||
struct sockaddr_storage address;
|
||||
struct iovec iovstack[UIO_FASTIOV], *iov = iovstack;
|
||||
unsigned char ctl[sizeof(struct cmsghdr) + 20]
|
||||
__attribute__ ((aligned(sizeof(__kernel_size_t))));
|
||||
/* 20 is size of ipv6_pktinfo */
|
||||
unsigned char *ctl_buf = ctl;
|
||||
struct msghdr msg_sys;
|
||||
int err, ctl_len, iov_size, total_len;
|
||||
int fput_needed;
|
||||
|
||||
err = -EFAULT;
|
||||
if (MSG_CMSG_COMPAT & flags) {
|
||||
if (get_compat_msghdr(&msg_sys, msg_compat))
|
||||
if (get_compat_msghdr(msg_sys, msg_compat))
|
||||
return -EFAULT;
|
||||
} else if (copy_from_user(&msg_sys, msg, sizeof(struct msghdr)))
|
||||
} else if (copy_from_user(msg_sys, msg, sizeof(struct msghdr)))
|
||||
return -EFAULT;
|
||||
|
||||
sock = sockfd_lookup_light(fd, &err, &fput_needed);
|
||||
if (!sock)
|
||||
goto out;
|
||||
|
||||
/* do not move before msg_sys is valid */
|
||||
err = -EMSGSIZE;
|
||||
if (msg_sys.msg_iovlen > UIO_MAXIOV)
|
||||
goto out_put;
|
||||
if (msg_sys->msg_iovlen > UIO_MAXIOV)
|
||||
goto out;
|
||||
|
||||
/* Check whether to allocate the iovec area */
|
||||
err = -ENOMEM;
|
||||
iov_size = msg_sys.msg_iovlen * sizeof(struct iovec);
|
||||
if (msg_sys.msg_iovlen > UIO_FASTIOV) {
|
||||
iov_size = msg_sys->msg_iovlen * sizeof(struct iovec);
|
||||
if (msg_sys->msg_iovlen > UIO_FASTIOV) {
|
||||
iov = sock_kmalloc(sock->sk, iov_size, GFP_KERNEL);
|
||||
if (!iov)
|
||||
goto out_put;
|
||||
goto out;
|
||||
}
|
||||
|
||||
/* This will also move the address data into kernel space */
|
||||
if (MSG_CMSG_COMPAT & flags) {
|
||||
err = verify_compat_iovec(&msg_sys, iov,
|
||||
err = verify_compat_iovec(msg_sys, iov,
|
||||
(struct sockaddr *)&address,
|
||||
VERIFY_READ);
|
||||
} else
|
||||
err = verify_iovec(&msg_sys, iov,
|
||||
err = verify_iovec(msg_sys, iov,
|
||||
(struct sockaddr *)&address,
|
||||
VERIFY_READ);
|
||||
if (err < 0)
|
||||
|
|
@ -1922,17 +1929,17 @@ SYSCALL_DEFINE3(sendmsg, int, fd, struct msghdr __user *, msg, unsigned, flags)
|
|||
|
||||
err = -ENOBUFS;
|
||||
|
||||
if (msg_sys.msg_controllen > INT_MAX)
|
||||
if (msg_sys->msg_controllen > INT_MAX)
|
||||
goto out_freeiov;
|
||||
ctl_len = msg_sys.msg_controllen;
|
||||
ctl_len = msg_sys->msg_controllen;
|
||||
if ((MSG_CMSG_COMPAT & flags) && ctl_len) {
|
||||
err =
|
||||
cmsghdr_from_user_compat_to_kern(&msg_sys, sock->sk, ctl,
|
||||
cmsghdr_from_user_compat_to_kern(msg_sys, sock->sk, ctl,
|
||||
sizeof(ctl));
|
||||
if (err)
|
||||
goto out_freeiov;
|
||||
ctl_buf = msg_sys.msg_control;
|
||||
ctl_len = msg_sys.msg_controllen;
|
||||
ctl_buf = msg_sys->msg_control;
|
||||
ctl_len = msg_sys->msg_controllen;
|
||||
} else if (ctl_len) {
|
||||
if (ctl_len > sizeof(ctl)) {
|
||||
ctl_buf = sock_kmalloc(sock->sk, ctl_len, GFP_KERNEL);
|
||||
|
|
@ -1941,21 +1948,22 @@ SYSCALL_DEFINE3(sendmsg, int, fd, struct msghdr __user *, msg, unsigned, flags)
|
|||
}
|
||||
err = -EFAULT;
|
||||
/*
|
||||
* Careful! Before this, msg_sys.msg_control contains a user pointer.
|
||||
* Careful! Before this, msg_sys->msg_control contains a user pointer.
|
||||
* Afterwards, it will be a kernel pointer. Thus the compiler-assisted
|
||||
* checking falls down on this.
|
||||
*/
|
||||
if (copy_from_user(ctl_buf,
|
||||
(void __user __force *)msg_sys.msg_control,
|
||||
(void __user __force *)msg_sys->msg_control,
|
||||
ctl_len))
|
||||
goto out_freectl;
|
||||
msg_sys.msg_control = ctl_buf;
|
||||
msg_sys->msg_control = ctl_buf;
|
||||
}
|
||||
msg_sys.msg_flags = flags;
|
||||
msg_sys->msg_flags = flags;
|
||||
|
||||
if (sock->file->f_flags & O_NONBLOCK)
|
||||
msg_sys.msg_flags |= MSG_DONTWAIT;
|
||||
err = sock_sendmsg(sock, &msg_sys, total_len);
|
||||
msg_sys->msg_flags |= MSG_DONTWAIT;
|
||||
err = (nosec ? sock_sendmsg_nosec : sock_sendmsg)(sock, msg_sys,
|
||||
total_len);
|
||||
|
||||
out_freectl:
|
||||
if (ctl_buf != ctl)
|
||||
|
|
@ -1963,12 +1971,114 @@ out_freectl:
|
|||
out_freeiov:
|
||||
if (iov != iovstack)
|
||||
sock_kfree_s(sock->sk, iov, iov_size);
|
||||
out_put:
|
||||
out:
|
||||
return err;
|
||||
}
|
||||
|
||||
/*
|
||||
* BSD sendmsg interface
|
||||
*/
|
||||
|
||||
SYSCALL_DEFINE3(sendmsg, int, fd, struct msghdr __user *, msg, unsigned, flags)
|
||||
{
|
||||
int fput_needed, err;
|
||||
struct msghdr msg_sys;
|
||||
struct socket *sock = sockfd_lookup_light(fd, &err, &fput_needed);
|
||||
|
||||
if (!sock)
|
||||
goto out;
|
||||
|
||||
err = __sys_sendmsg(sock, msg, &msg_sys, flags, 0);
|
||||
|
||||
fput_light(sock->file, fput_needed);
|
||||
out:
|
||||
return err;
|
||||
}
|
||||
|
||||
/*
|
||||
* Linux sendmmsg interface
|
||||
*/
|
||||
|
||||
int __sys_sendmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen,
|
||||
unsigned int flags)
|
||||
{
|
||||
int fput_needed, err, datagrams;
|
||||
struct socket *sock;
|
||||
struct mmsghdr __user *entry;
|
||||
struct compat_mmsghdr __user *compat_entry;
|
||||
struct msghdr msg_sys;
|
||||
|
||||
datagrams = 0;
|
||||
|
||||
sock = sockfd_lookup_light(fd, &err, &fput_needed);
|
||||
if (!sock)
|
||||
return err;
|
||||
|
||||
err = sock_error(sock->sk);
|
||||
if (err)
|
||||
goto out_put;
|
||||
|
||||
entry = mmsg;
|
||||
compat_entry = (struct compat_mmsghdr __user *)mmsg;
|
||||
|
||||
while (datagrams < vlen) {
|
||||
/*
|
||||
* No need to ask LSM for more than the first datagram.
|
||||
*/
|
||||
if (MSG_CMSG_COMPAT & flags) {
|
||||
err = __sys_sendmsg(sock, (struct msghdr __user *)compat_entry,
|
||||
&msg_sys, flags, datagrams);
|
||||
if (err < 0)
|
||||
break;
|
||||
err = __put_user(err, &compat_entry->msg_len);
|
||||
++compat_entry;
|
||||
} else {
|
||||
err = __sys_sendmsg(sock, (struct msghdr __user *)entry,
|
||||
&msg_sys, flags, datagrams);
|
||||
if (err < 0)
|
||||
break;
|
||||
err = put_user(err, &entry->msg_len);
|
||||
++entry;
|
||||
}
|
||||
|
||||
if (err)
|
||||
break;
|
||||
++datagrams;
|
||||
}
|
||||
|
||||
out_put:
|
||||
fput_light(sock->file, fput_needed);
|
||||
|
||||
if (err == 0)
|
||||
return datagrams;
|
||||
|
||||
if (datagrams != 0) {
|
||||
/*
|
||||
* We may send less entries than requested (vlen) if the
|
||||
* sock is non blocking...
|
||||
*/
|
||||
if (err != -EAGAIN) {
|
||||
/*
|
||||
* ... or if sendmsg returns an error after we
|
||||
* send some datagrams, where we record the
|
||||
* error to return on the next call or if the
|
||||
* app asks about it using getsockopt(SO_ERROR).
|
||||
*/
|
||||
sock->sk->sk_err = -err;
|
||||
}
|
||||
|
||||
return datagrams;
|
||||
}
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
SYSCALL_DEFINE4(sendmmsg, int, fd, struct mmsghdr __user *, mmsg,
|
||||
unsigned int, vlen, unsigned int, flags)
|
||||
{
|
||||
return __sys_sendmmsg(fd, mmsg, vlen, flags);
|
||||
}
|
||||
|
||||
static int __sys_recvmsg(struct socket *sock, struct msghdr __user *msg,
|
||||
struct msghdr *msg_sys, unsigned flags, int nosec)
|
||||
{
|
||||
|
|
@ -2214,11 +2324,11 @@ SYSCALL_DEFINE5(recvmmsg, int, fd, struct mmsghdr __user *, mmsg,
|
|||
#ifdef __ARCH_WANT_SYS_SOCKETCALL
|
||||
/* Argument list sizes for sys_socketcall */
|
||||
#define AL(x) ((x) * sizeof(unsigned long))
|
||||
static const unsigned char nargs[20] = {
|
||||
static const unsigned char nargs[21] = {
|
||||
AL(0), AL(3), AL(3), AL(3), AL(2), AL(3),
|
||||
AL(3), AL(3), AL(4), AL(4), AL(4), AL(6),
|
||||
AL(6), AL(2), AL(5), AL(5), AL(3), AL(3),
|
||||
AL(4), AL(5)
|
||||
AL(4), AL(5), AL(4)
|
||||
};
|
||||
|
||||
#undef AL
|
||||
|
|
@ -2238,7 +2348,7 @@ SYSCALL_DEFINE2(socketcall, int, call, unsigned long __user *, args)
|
|||
int err;
|
||||
unsigned int len;
|
||||
|
||||
if (call < 1 || call > SYS_RECVMMSG)
|
||||
if (call < 1 || call > SYS_SENDMMSG)
|
||||
return -EINVAL;
|
||||
|
||||
len = nargs[call];
|
||||
|
|
@ -2313,6 +2423,9 @@ SYSCALL_DEFINE2(socketcall, int, call, unsigned long __user *, args)
|
|||
case SYS_SENDMSG:
|
||||
err = sys_sendmsg(a0, (struct msghdr __user *)a1, a[2]);
|
||||
break;
|
||||
case SYS_SENDMMSG:
|
||||
err = sys_sendmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3]);
|
||||
break;
|
||||
case SYS_RECVMSG:
|
||||
err = sys_recvmsg(a0, (struct msghdr __user *)a1, a[2]);
|
||||
break;
|
||||
|
|
|
|||
Загрузка…
Ссылка в новой задаче