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Diffstat (limited to 'net/phonet/pep.c')
-rw-r--r--net/phonet/pep.c174
1 files changed, 93 insertions, 81 deletions
diff --git a/net/phonet/pep.c b/net/phonet/pep.c
index e77411735de8..120e711ea78c 100644
--- a/net/phonet/pep.c
+++ b/net/phonet/pep.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* File: pep.c
*
@@ -6,23 +7,10 @@
* Copyright (C) 2008 Nokia Corporation.
*
* Author: Rémi Denis-Courmont
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
- * 02110-1301 USA
*/
#include <linux/kernel.h>
+#include <linux/sched/signal.h>
#include <linux/slab.h>
#include <linux/socket.h>
#include <net/sock.h>
@@ -131,7 +119,7 @@ static int pep_indicate(struct sock *sk, u8 id, u8 code,
ph->utid = 0;
ph->message_id = id;
ph->pipe_handle = pn->pipe_handle;
- ph->data[0] = code;
+ ph->error_code = code;
return pn_skb_send(sk, skb, NULL);
}
@@ -152,7 +140,7 @@ static int pipe_handler_request(struct sock *sk, u8 id, u8 code,
ph->utid = id; /* whatever */
ph->message_id = id;
ph->pipe_handle = pn->pipe_handle;
- ph->data[0] = code;
+ ph->error_code = code;
return pn_skb_send(sk, skb, NULL);
}
@@ -207,7 +195,7 @@ static int pep_ctrlreq_error(struct sock *sk, struct sk_buff *oskb, u8 code,
struct pnpipehdr *ph;
struct sockaddr_pn dst;
u8 data[4] = {
- oph->data[0], /* PEP type */
+ oph->pep_type, /* PEP type */
code, /* error code, at an unusual offset */
PAD, PAD,
};
@@ -220,7 +208,7 @@ static int pep_ctrlreq_error(struct sock *sk, struct sk_buff *oskb, u8 code,
ph->utid = oph->utid;
ph->message_id = PNS_PEP_CTRL_RESP;
ph->pipe_handle = oph->pipe_handle;
- ph->data[0] = oph->data[1]; /* CTRL id */
+ ph->data0 = oph->data[0]; /* CTRL id */
pn_skb_get_src_sockaddr(oskb, &dst);
return pn_skb_send(sk, skb, &dst);
@@ -271,17 +259,17 @@ static int pipe_rcv_status(struct sock *sk, struct sk_buff *skb)
return -EINVAL;
hdr = pnp_hdr(skb);
- if (hdr->data[0] != PN_PEP_TYPE_COMMON) {
- LIMIT_NETDEBUG(KERN_DEBUG"Phonet unknown PEP type: %u\n",
- (unsigned int)hdr->data[0]);
+ if (hdr->pep_type != PN_PEP_TYPE_COMMON) {
+ net_dbg_ratelimited("Phonet unknown PEP type: %u\n",
+ (unsigned int)hdr->pep_type);
return -EOPNOTSUPP;
}
- switch (hdr->data[1]) {
+ switch (hdr->data[0]) {
case PN_PEP_IND_FLOW_CONTROL:
switch (pn->tx_fc) {
case PN_LEGACY_FLOW_CONTROL:
- switch (hdr->data[4]) {
+ switch (hdr->data[3]) {
case PEP_IND_BUSY:
atomic_set(&pn->tx_credits, 0);
break;
@@ -291,7 +279,7 @@ static int pipe_rcv_status(struct sock *sk, struct sk_buff *skb)
}
break;
case PN_ONE_CREDIT_FLOW_CONTROL:
- if (hdr->data[4] == PEP_IND_READY)
+ if (hdr->data[3] == PEP_IND_READY)
atomic_set(&pn->tx_credits, wake = 1);
break;
}
@@ -300,12 +288,12 @@ static int pipe_rcv_status(struct sock *sk, struct sk_buff *skb)
case PN_PEP_IND_ID_MCFC_GRANT_CREDITS:
if (pn->tx_fc != PN_MULTI_CREDIT_FLOW_CONTROL)
break;
- atomic_add(wake = hdr->data[4], &pn->tx_credits);
+ atomic_add(wake = hdr->data[3], &pn->tx_credits);
break;
default:
- LIMIT_NETDEBUG(KERN_DEBUG"Phonet unknown PEP indication: %u\n",
- (unsigned int)hdr->data[1]);
+ net_dbg_ratelimited("Phonet unknown PEP indication: %u\n",
+ (unsigned int)hdr->data[0]);
return -EOPNOTSUPP;
}
if (wake)
@@ -317,7 +305,7 @@ static int pipe_rcv_created(struct sock *sk, struct sk_buff *skb)
{
struct pep_sock *pn = pep_sk(sk);
struct pnpipehdr *hdr = pnp_hdr(skb);
- u8 n_sb = hdr->data[0];
+ u8 n_sb = hdr->data0;
pn->rx_fc = pn->tx_fc = PN_LEGACY_FLOW_CONTROL;
__skb_pull(skb, sizeof(*hdr));
@@ -380,7 +368,7 @@ static int pipe_do_rcv(struct sock *sk, struct sk_buff *skb)
err = -EINVAL;
goto out;
}
- /* fall through */
+ fallthrough;
case PNS_PEP_DISABLE_REQ:
atomic_set(&pn->tx_credits, 0);
pep_reply(sk, skb, PN_PIPE_NO_ERROR, NULL, 0, GFP_ATOMIC);
@@ -388,7 +376,7 @@ static int pipe_do_rcv(struct sock *sk, struct sk_buff *skb)
case PNS_PEP_CTRL_REQ:
if (skb_queue_len(&pn->ctrlreq_queue) >= PNPIPE_CTRLREQ_MAX) {
- atomic_inc(&sk->sk_drops);
+ sk_drops_inc(sk);
break;
}
__skb_pull(skb, 4);
@@ -397,7 +385,7 @@ static int pipe_do_rcv(struct sock *sk, struct sk_buff *skb)
case PNS_PIPE_ALIGNED_DATA:
__skb_pull(skb, 1);
- /* fall through */
+ fallthrough;
case PNS_PIPE_DATA:
__skb_pull(skb, 3); /* Pipe data header */
if (!pn_flow_safe(pn->rx_fc)) {
@@ -409,7 +397,7 @@ static int pipe_do_rcv(struct sock *sk, struct sk_buff *skb)
}
if (pn->rx_credits == 0) {
- atomic_inc(&sk->sk_drops);
+ sk_drops_inc(sk);
err = -ENOBUFS;
break;
}
@@ -429,11 +417,11 @@ static int pipe_do_rcv(struct sock *sk, struct sk_buff *skb)
err = pipe_rcv_created(sk, skb);
if (err)
break;
- /* fall through */
+ fallthrough;
case PNS_PIPE_RESET_IND:
if (!pn->init_enable)
break;
- /* fall through */
+ fallthrough;
case PNS_PIPE_ENABLED_IND:
if (!pn_flow_safe(pn->tx_fc)) {
atomic_set(&pn->tx_credits, 1);
@@ -451,8 +439,8 @@ static int pipe_do_rcv(struct sock *sk, struct sk_buff *skb)
break;
default:
- LIMIT_NETDEBUG(KERN_DEBUG"Phonet unknown PEP message: %u\n",
- hdr->message_id);
+ net_dbg_ratelimited("Phonet unknown PEP message: %u\n",
+ hdr->message_id);
err = -EINVAL;
}
out:
@@ -462,10 +450,9 @@ out:
queue:
skb->dev = NULL;
skb_set_owner_r(skb, sk);
- err = skb->len;
skb_queue_tail(queue, skb);
if (!sock_flag(sk, SOCK_DEAD))
- sk->sk_data_ready(sk, err);
+ sk->sk_data_ready(sk);
return NET_RX_SUCCESS;
}
@@ -506,7 +493,7 @@ static int pep_connresp_rcv(struct sock *sk, struct sk_buff *skb)
return -ECONNREFUSED;
/* Parse sub-blocks */
- n_sb = hdr->data[4];
+ n_sb = hdr->data[3];
while (n_sb > 0) {
u8 type, buf[6], len = sizeof(buf);
const u8 *data = pep_get_sb(skb, &type, &len, buf);
@@ -568,7 +555,7 @@ static int pipe_handler_do_rcv(struct sock *sk, struct sk_buff *skb)
switch (hdr->message_id) {
case PNS_PIPE_ALIGNED_DATA:
__skb_pull(skb, 1);
- /* fall through */
+ fallthrough;
case PNS_PIPE_DATA:
__skb_pull(skb, 3); /* Pipe data header */
if (!pn_flow_safe(pn->rx_fc)) {
@@ -580,17 +567,16 @@ static int pipe_handler_do_rcv(struct sock *sk, struct sk_buff *skb)
}
if (pn->rx_credits == 0) {
- atomic_inc(&sk->sk_drops);
+ sk_drops_inc(sk);
err = NET_RX_DROP;
break;
}
pn->rx_credits--;
skb->dev = NULL;
skb_set_owner_r(skb, sk);
- err = skb->len;
skb_queue_tail(&sk->sk_receive_queue, skb);
if (!sock_flag(sk, SOCK_DEAD))
- sk->sk_data_ready(sk, err);
+ sk->sk_data_ready(sk);
return NET_RX_SUCCESS;
case PNS_PEP_CONNECT_RESP:
@@ -698,7 +684,7 @@ static int pep_do_rcv(struct sock *sk, struct sk_buff *skb)
skb_queue_head(&sk->sk_receive_queue, skb);
sk_acceptq_added(sk);
if (!sock_flag(sk, SOCK_DEAD))
- sk->sk_data_ready(sk, 0);
+ sk->sk_data_ready(sk);
return NET_RX_SUCCESS;
case PNS_PEP_DISCONNECT_REQ:
@@ -740,7 +726,7 @@ static int pipe_do_remove(struct sock *sk)
ph->utid = 0;
ph->message_id = PNS_PIPE_REMOVE_REQ;
ph->pipe_handle = pn->pipe_handle;
- ph->data[0] = PAD;
+ ph->data0 = PAD;
return pn_skb_send(sk, skb, NULL);
}
@@ -773,7 +759,8 @@ static void pep_sock_close(struct sock *sk, long timeout)
sock_put(sk);
}
-static struct sock *pep_sock_accept(struct sock *sk, int flags, int *errp)
+static struct sock *pep_sock_accept(struct sock *sk,
+ struct proto_accept_arg *arg)
{
struct pep_sock *pn = pep_sk(sk), *newpn;
struct sock *newsk = NULL;
@@ -785,7 +772,8 @@ static struct sock *pep_sock_accept(struct sock *sk, int flags, int *errp)
u8 pipe_handle, enabled, n_sb;
u8 aligned = 0;
- skb = skb_recv_datagram(sk, 0, flags & O_NONBLOCK, errp);
+ skb = skb_recv_datagram(sk, (arg->flags & O_NONBLOCK) ? MSG_DONTWAIT : 0,
+ &arg->err);
if (!skb)
return NULL;
@@ -817,7 +805,7 @@ static struct sock *pep_sock_accept(struct sock *sk, int flags, int *errp)
peer_type = hdr->other_pep_type << 8;
/* Parse sub-blocks (options) */
- n_sb = hdr->data[4];
+ n_sb = hdr->data[3];
while (n_sb > 0) {
u8 type, buf[1], len = sizeof(buf);
const u8 *data = pep_get_sb(skb, &type, &len, buf);
@@ -838,6 +826,7 @@ static struct sock *pep_sock_accept(struct sock *sk, int flags, int *errp)
}
/* Check for duplicate pipe handle */
+ pn_skb_get_dst_sockaddr(skb, &dst);
newsk = pep_find_pipe(&pn->hlist, &dst, pipe_handle);
if (unlikely(newsk)) {
__sock_put(newsk);
@@ -847,7 +836,8 @@ static struct sock *pep_sock_accept(struct sock *sk, int flags, int *errp)
}
/* Create a new to-be-accepted sock */
- newsk = sk_alloc(sock_net(sk), PF_PHONET, GFP_KERNEL, sk->sk_prot);
+ newsk = sk_alloc(sock_net(sk), PF_PHONET, GFP_KERNEL, sk->sk_prot,
+ arg->kern);
if (!newsk) {
pep_reject_conn(sk, skb, PN_PIPE_ERR_OVERLOAD, GFP_KERNEL);
err = -ENOBUFS;
@@ -861,7 +851,6 @@ static struct sock *pep_sock_accept(struct sock *sk, int flags, int *errp)
newsk->sk_destruct = pipe_destruct;
newpn = pep_sk(newsk);
- pn_skb_get_dst_sockaddr(skb, &dst);
pn_skb_get_src_sockaddr(skb, &src);
newpn->pn_sk.sobject = pn_sockaddr_get_object(&dst);
newpn->pn_sk.dobject = pn_sockaddr_get_object(&src);
@@ -880,6 +869,7 @@ static struct sock *pep_sock_accept(struct sock *sk, int flags, int *errp)
err = pep_accept_conn(newsk, skb);
if (err) {
+ __sock_put(sk);
sock_put(newsk);
newsk = NULL;
goto drop;
@@ -888,11 +878,12 @@ static struct sock *pep_sock_accept(struct sock *sk, int flags, int *errp)
drop:
release_sock(sk);
kfree_skb(skb);
- *errp = err;
+ arg->err = err;
return newsk;
}
-static int pep_sock_connect(struct sock *sk, struct sockaddr *addr, int len)
+static int pep_sock_connect(struct sock *sk, struct sockaddr_unsized *addr,
+ int len)
{
struct pep_sock *pn = pep_sk(sk);
int err;
@@ -927,10 +918,40 @@ static int pep_sock_enable(struct sock *sk, struct sockaddr *addr, int len)
return 0;
}
-static int pep_ioctl(struct sock *sk, int cmd, unsigned long arg)
+static unsigned int pep_first_packet_length(struct sock *sk)
+{
+ struct pep_sock *pn = pep_sk(sk);
+ struct sk_buff_head *q;
+ struct sk_buff *skb;
+ unsigned int len = 0;
+ bool found = false;
+
+ if (sock_flag(sk, SOCK_URGINLINE)) {
+ q = &pn->ctrlreq_queue;
+ spin_lock_bh(&q->lock);
+ skb = skb_peek(q);
+ if (skb) {
+ len = skb->len;
+ found = true;
+ }
+ spin_unlock_bh(&q->lock);
+ }
+
+ if (likely(!found)) {
+ q = &sk->sk_receive_queue;
+ spin_lock_bh(&q->lock);
+ skb = skb_peek(q);
+ if (skb)
+ len = skb->len;
+ spin_unlock_bh(&q->lock);
+ }
+
+ return len;
+}
+
+static int pep_ioctl(struct sock *sk, int cmd, int *karg)
{
struct pep_sock *pn = pep_sk(sk);
- int answ;
int ret = -ENOIOCTLCMD;
switch (cmd) {
@@ -940,16 +961,8 @@ static int pep_ioctl(struct sock *sk, int cmd, unsigned long arg)
break;
}
- lock_sock(sk);
- if (sock_flag(sk, SOCK_URGINLINE) &&
- !skb_queue_empty(&pn->ctrlreq_queue))
- answ = skb_peek(&pn->ctrlreq_queue)->len;
- else if (!skb_queue_empty(&sk->sk_receive_queue))
- answ = skb_peek(&sk->sk_receive_queue)->len;
- else
- answ = 0;
- release_sock(sk);
- ret = put_user(answ, (int __user *)arg);
+ *karg = pep_first_packet_length(sk);
+ ret = 0;
break;
case SIOCPNENABLEPIPE:
@@ -958,6 +971,8 @@ static int pep_ioctl(struct sock *sk, int cmd, unsigned long arg)
ret = -EBUSY;
else if (sk->sk_state == TCP_ESTABLISHED)
ret = -EISCONN;
+ else if (!pn->pn_sk.sobject)
+ ret = -EADDRNOTAVAIL;
else
ret = pep_sock_enable(sk, NULL, 0);
release_sock(sk);
@@ -987,7 +1002,7 @@ static int pep_init(struct sock *sk)
}
static int pep_setsockopt(struct sock *sk, int level, int optname,
- char __user *optval, unsigned int optlen)
+ sockptr_t optval, unsigned int optlen)
{
struct pep_sock *pn = pep_sk(sk);
int val = 0, err = 0;
@@ -995,7 +1010,7 @@ static int pep_setsockopt(struct sock *sk, int level, int optname,
if (level != SOL_PNPIPE)
return -ENOPROTOOPT;
if (optlen >= sizeof(int)) {
- if (get_user(val, (int __user *) optval))
+ if (copy_from_sockptr(&val, optval, sizeof(int)))
return -EFAULT;
}
@@ -1108,7 +1123,7 @@ static int pipe_skb_send(struct sock *sk, struct sk_buff *skb)
ph->utid = 0;
if (pn->aligned) {
ph->message_id = PNS_PIPE_ALIGNED_DATA;
- ph->data[0] = 0; /* padding */
+ ph->data0 = 0; /* padding */
} else
ph->message_id = PNS_PIPE_DATA;
ph->pipe_handle = pn->pipe_handle;
@@ -1120,8 +1135,7 @@ static int pipe_skb_send(struct sock *sk, struct sk_buff *skb)
}
-static int pep_sendmsg(struct kiocb *iocb, struct sock *sk,
- struct msghdr *msg, size_t len)
+static int pep_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
{
struct pep_sock *pn = pep_sk(sk);
struct sk_buff *skb;
@@ -1143,7 +1157,7 @@ static int pep_sendmsg(struct kiocb *iocb, struct sock *sk,
return err;
skb_reserve(skb, MAX_PHONET_HEADER + 3 + pn->aligned);
- err = memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len);
+ err = memcpy_from_msg(skb_put(skb, len), msg, len);
if (err < 0)
goto outfree;
@@ -1170,7 +1184,7 @@ disabled:
/* Wait until flow control allows TX */
done = atomic_read(&pn->tx_credits);
while (!done) {
- DEFINE_WAIT(wait);
+ DEFINE_WAIT_FUNC(wait, woken_wake_function);
if (!timeo) {
err = -EAGAIN;
@@ -1181,10 +1195,9 @@ disabled:
goto out;
}
- prepare_to_wait(sk_sleep(sk), &wait,
- TASK_INTERRUPTIBLE);
- done = sk_wait_event(sk, &timeo, atomic_read(&pn->tx_credits));
- finish_wait(sk_sleep(sk), &wait);
+ add_wait_queue(sk_sleep(sk), &wait);
+ done = sk_wait_event(sk, &timeo, atomic_read(&pn->tx_credits), &wait);
+ remove_wait_queue(sk_sleep(sk), &wait);
if (sk->sk_state != TCP_ESTABLISHED)
goto disabled;
@@ -1248,9 +1261,8 @@ struct sk_buff *pep_read(struct sock *sk)
return skb;
}
-static int pep_recvmsg(struct kiocb *iocb, struct sock *sk,
- struct msghdr *msg, size_t len, int noblock,
- int flags, int *addr_len)
+static int pep_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
+ int flags, int *addr_len)
{
struct sk_buff *skb;
int err;
@@ -1279,7 +1291,7 @@ static int pep_recvmsg(struct kiocb *iocb, struct sock *sk,
return -EINVAL;
}
- skb = skb_recv_datagram(sk, flags, noblock, &err);
+ skb = skb_recv_datagram(sk, flags, &err);
lock_sock(sk);
if (skb == NULL) {
if (err == -ENOTCONN && sk->sk_state == TCP_CLOSE_WAIT)
@@ -1298,7 +1310,7 @@ copy:
else
len = skb->len;
- err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, len);
+ err = skb_copy_datagram_msg(skb, 0, msg, len);
if (!err)
err = (flags & MSG_TRUNC) ? skb->len : len;
@@ -1353,7 +1365,7 @@ static struct proto pep_proto = {
.name = "PNPIPE",
};
-static struct phonet_protocol pep_pn_proto = {
+static const struct phonet_protocol pep_pn_proto = {
.ops = &phonet_stream_ops,
.prot = &pep_proto,
.sock_type = SOCK_SEQPACKET,
generated by cgit (git 2.34.1) at 2025-12-25 08:44:15 +0000