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Merge branch 'work.sock_recvmsg' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

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Pull kern_recvmsg reduction from Al Viro:
 "kernel_recvmsg() is a set_fs()-using wrapper for sock_recvmsg(). In
  all but one case that is not needed - use of ITER_KVEC for ->msg_iter
  takes care of the data and does not care about set_fs(). The only
  exception is svc_udp_recvfrom() where we want cmsg to be store into
  kernel object; everything else can just use sock_recvmsg() and be done
  with that.

  A followup converting svc_udp_recvfrom() away from set_fs() (and
  killing kernel_recvmsg() off) is *NOT* in here - I'd like to hear what
  netdev folks think of the approach proposed in that followup)"

* 'work.sock_recvmsg' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  tipc: switch to sock_recvmsg()
  smc: switch to sock_recvmsg()
  ipvs: switch to sock_recvmsg()
  mISDN: switch to sock_recvmsg()
  drbd: switch to sock_recvmsg()
  lustre lnet_sock_read(): switch to sock_recvmsg()
  cfs2: switch to sock_recvmsg()
  ncpfs: switch to sock_recvmsg()
  dlm: switch to sock_recvmsg()
  svc_recvfrom(): switch to sock_recvmsg()
This commit is contained in:
Linus Torvalds 2018-01-30 18:59:03 -08:00
commit 1ed2d76e02
11 changed files with 46 additions and 56 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/block/drbd/drbd_main.c
View File

@ -1847,7 +1847,7 @@ int drbd_send(struct drbd_connection *connection, struct socket *sock,
void *buf, size_t size, unsigned msg_flags)
{
struct kvec iov = {.iov_base = buf, .iov_len = size};
struct msghdr msg;
struct msghdr msg = {.msg_flags = msg_flags | MSG_NOSIGNAL};
int rv, sent = 0;
if (!sock)
@ -1855,12 +1855,6 @@ int drbd_send(struct drbd_connection *connection, struct socket *sock,
/* THINK if (signal_pending) return ... ? */
msg.msg_name = NULL;
msg.msg_namelen = 0;
msg.msg_control = NULL;
msg.msg_controllen = 0;
msg.msg_flags = msg_flags | MSG_NOSIGNAL;
iov_iter_kvec(&msg.msg_iter, WRITE | ITER_KVEC, &iov, 1, size);
if (sock == connection->data.socket) {

3
drivers/block/drbd/drbd_receiver.c
View File

@ -516,7 +516,8 @@ static int drbd_recv_short(struct socket *sock, void *buf, size_t size, int flag
struct msghdr msg = {
.msg_flags = (flags ? flags : MSG_WAITALL | MSG_NOSIGNAL)
};
return kernel_recvmsg(sock, &msg, &iov, 1, size, msg.msg_flags);
iov_iter_kvec(&msg.msg_iter, READ | ITER_KVEC, &iov, 1, size);
return sock_recvmsg(sock, &msg, msg.msg_flags);
}
static int drbd_recv(struct drbd_connection *connection, void *buf, size_t size)

22
drivers/isdn/mISDN/l1oip_core.c
View File

@ -645,8 +645,10 @@ l1oip_socket_thread(void *data)
{
struct l1oip *hc = (struct l1oip *)data;
int ret = 0;
struct msghdr msg;
struct sockaddr_in sin_rx;
struct kvec iov;
struct msghdr msg = {.msg_name = &sin_rx,
.msg_namelen = sizeof(sin_rx)};
unsigned char *recvbuf;
size_t recvbuf_size = 1500;
int recvlen;
@ -661,6 +663,9 @@ l1oip_socket_thread(void *data)
goto fail;
}
iov.iov_base = recvbuf;
iov.iov_len = recvbuf_size;
/* make daemon */
allow_signal(SIGTERM);
@ -697,12 +702,6 @@ l1oip_socket_thread(void *data)
goto fail;
}
/* build receive message */
msg.msg_name = &sin_rx;
msg.msg_namelen = sizeof(sin_rx);
msg.msg_control = NULL;
msg.msg_controllen = 0;
/* build send message */
hc->sendmsg.msg_name = &hc->sin_remote;
hc->sendmsg.msg_namelen = sizeof(hc->sin_remote);
@ -719,12 +718,9 @@ l1oip_socket_thread(void *data)
printk(KERN_DEBUG "%s: socket created and open\n",
__func__);
while (!signal_pending(current)) {
struct kvec iov = {
.iov_base = recvbuf,
.iov_len = recvbuf_size,
};
recvlen = kernel_recvmsg(socket, &msg, &iov, 1,
recvbuf_size, 0);
iov_iter_kvec(&msg.msg_iter, READ | ITER_KVEC, &iov, 1,
recvbuf_size);
recvlen = sock_recvmsg(socket, &msg, 0);
if (recvlen > 0) {
l1oip_socket_parse(hc, &sin_rx, recvbuf, recvlen);
} else {

24
drivers/staging/lustre/lnet/lnet/lib-socket.c
View File

@ -314,19 +314,20 @@ lnet_sock_read(struct socket *sock, void *buffer, int nob, int timeout)
long jiffies_left = timeout * msecs_to_jiffies(MSEC_PER_SEC);
unsigned long then;
struct timeval tv;
struct kvec iov = {
.iov_base = buffer,
.iov_len = nob
};
struct msghdr msg = {
.msg_flags = 0
};
LASSERT(nob > 0);
LASSERT(jiffies_left > 0);
for (;;) {
struct kvec iov = {
.iov_base = buffer,
.iov_len = nob
};
struct msghdr msg = {
.msg_flags = 0
};
iov_iter_kvec(&msg.msg_iter, READ | ITER_KVEC, &iov, 1, nob);
for (;;) {
/* Set receive timeout to remaining time */
jiffies_to_timeval(jiffies_left, &tv);
rc = kernel_setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO,
@ -338,7 +339,7 @@ lnet_sock_read(struct socket *sock, void *buffer, int nob, int timeout)
}
then = jiffies;
rc = kernel_recvmsg(sock, &msg, &iov, 1, nob, 0);
rc = sock_recvmsg(sock, &msg, 0);
jiffies_left -= jiffies - then;
if (rc < 0)
@ -347,10 +348,7 @@ lnet_sock_read(struct socket *sock, void *buffer, int nob, int timeout)
if (!rc)
return -ECONNRESET;
buffer = ((char *)buffer) + rc;
nob -= rc;
if (!nob)
if (!msg_data_left(&msg))
return 0;
if (jiffies_left <= 0)

4
fs/dlm/lowcomms.c
View File

@ -675,9 +675,9 @@ static int receive_from_sock(struct connection *con)
nvec = 2;
}
len = iov[0].iov_len + iov[1].iov_len;
iov_iter_kvec(&msg.msg_iter, READ | ITER_KVEC, iov, nvec, len);
r = ret = kernel_recvmsg(con->sock, &msg, iov, nvec, len,
MSG_DONTWAIT | MSG_NOSIGNAL);
r = ret = sock_recvmsg(con->sock, &msg, MSG_DONTWAIT | MSG_NOSIGNAL);
if (ret <= 0)
goto out_close;
else if (ret == len)

3
fs/ncpfs/sock.c
View File

@ -39,7 +39,8 @@ static int _recv(struct socket *sock, void *buf, int size, unsigned flags)
{
struct msghdr msg = {NULL, };
struct kvec iov = {buf, size};
return kernel_recvmsg(sock, &msg, &iov, 1, size, flags);
iov_iter_kvec(&msg.msg_iter, READ | ITER_KVEC, &iov, 1, size);
return sock_recvmsg(sock, &msg, flags);
}
static int _send(struct socket *sock, const void *buff, int len)

3
fs/ocfs2/cluster/tcp.c
View File

@ -918,7 +918,8 @@ static int o2net_recv_tcp_msg(struct socket *sock, void *data, size_t len)
{
struct kvec vec = { .iov_len = len, .iov_base = data, };
struct msghdr msg = { .msg_flags = MSG_DONTWAIT, };
return kernel_recvmsg(sock, &msg, &vec, 1, len, msg.msg_flags);
iov_iter_kvec(&msg.msg_iter, READ | ITER_KVEC, &vec, 1, len);
return sock_recvmsg(sock, &msg, MSG_DONTWAIT);
}
static int o2net_send_tcp_msg(struct socket *sock, struct kvec *vec,

9
net/netfilter/ipvs/ip_vs_sync.c
View File

@ -1636,17 +1636,14 @@ static int
ip_vs_receive(struct socket *sock, char *buffer, const size_t buflen)
{
struct msghdr msg = {NULL,};
struct kvec iov;
struct kvec iov = {buffer, buflen};
int len;
EnterFunction(7);
/* Receive a packet */
iov.iov_base = buffer;
iov.iov_len = (size_t)buflen;
len = kernel_recvmsg(sock, &msg, &iov, 1, buflen, MSG_DONTWAIT);
iov_iter_kvec(&msg.msg_iter, READ | ITER_KVEC, &iov, 1, buflen);
len = sock_recvmsg(sock, &msg, MSG_DONTWAIT);
if (len < 0)
return len;

18
net/smc/smc_clc.c
View File

@ -35,7 +35,7 @@ int smc_clc_wait_msg(struct smc_sock *smc, void *buf, int buflen,
struct smc_clc_msg_hdr *clcm = buf;
struct msghdr msg = {NULL, 0};
int reason_code = 0;
struct kvec vec;
struct kvec vec = {buf, buflen};
int len, datlen;
int krflags;
@ -43,12 +43,15 @@ int smc_clc_wait_msg(struct smc_sock *smc, void *buf, int buflen,
* so we don't consume any subsequent CLC message or payload data
* in the TCP byte stream
*/
vec.iov_base = buf;
vec.iov_len = buflen;
/*
* Caller must make sure that buflen is no less than
* sizeof(struct smc_clc_msg_hdr)
*/
krflags = MSG_PEEK | MSG_WAITALL;
smc->clcsock->sk->sk_rcvtimeo = CLC_WAIT_TIME;
len = kernel_recvmsg(smc->clcsock, &msg, &vec, 1,
sizeof(struct smc_clc_msg_hdr), krflags);
iov_iter_kvec(&msg.msg_iter, READ | ITER_KVEC, &vec, 1,
sizeof(struct smc_clc_msg_hdr));
len = sock_recvmsg(smc->clcsock, &msg, krflags);
if (signal_pending(current)) {
reason_code = -EINTR;
clc_sk->sk_err = EINTR;
@ -83,12 +86,11 @@ int smc_clc_wait_msg(struct smc_sock *smc, void *buf, int buflen,
}
/* receive the complete CLC message */
vec.iov_base = buf;
vec.iov_len = buflen;
memset(&msg, 0, sizeof(struct msghdr));
iov_iter_kvec(&msg.msg_iter, READ | ITER_KVEC, &vec, 1, buflen);
krflags = MSG_WAITALL;
smc->clcsock->sk->sk_rcvtimeo = CLC_WAIT_TIME;
len = kernel_recvmsg(smc->clcsock, &msg, &vec, 1, datlen, krflags);
len = sock_recvmsg(smc->clcsock, &msg, krflags);
if (len < datlen) {
smc->sk.sk_err = EPROTO;
reason_code = -EPROTO;

4
net/sunrpc/svcsock.c
View File

@ -338,8 +338,8 @@ static int svc_recvfrom(struct svc_rqst *rqstp, struct kvec *iov, int nr,
rqstp->rq_xprt_hlen = 0;
clear_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags);
len = kernel_recvmsg(svsk->sk_sock, &msg, iov, nr, buflen,
msg.msg_flags);
iov_iter_kvec(&msg.msg_iter, READ | ITER_KVEC, iov, nr, buflen);
len = sock_recvmsg(svsk->sk_sock, &msg, msg.msg_flags);
/* If we read a full record, then assume there may be more
* data to read (stream based sockets only!)
*/

4
net/tipc/server.c
View File

@ -264,8 +264,8 @@ static int tipc_receive_from_sock(struct tipc_conn *con)
iov.iov_base = buf;
iov.iov_len = s->max_rcvbuf_size;
msg.msg_name = &addr;
ret = kernel_recvmsg(con->sock, &msg, &iov, 1, iov.iov_len,
MSG_DONTWAIT);
iov_iter_kvec(&msg.msg_iter, READ | ITER_KVEC, &iov, 1, iov.iov_len);
ret = sock_recvmsg(con->sock, &msg, MSG_DONTWAIT);
if (ret <= 0) {
kmem_cache_free(s->rcvbuf_cache, buf);
goto out_close;