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Diffstat (limited to 'net/phonet/socket.c')
-rw-r--r--net/phonet/socket.c135
1 files changed, 40 insertions, 95 deletions
diff --git a/net/phonet/socket.c b/net/phonet/socket.c
index 1b050dd17393..4423d483c630 100644
--- a/net/phonet/socket.c
+++ b/net/phonet/socket.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* File: socket.c
*
@@ -7,20 +8,6 @@
*
* Authors: Sakari Ailus <sakari.ailus@nokia.com>
* 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/gfp.h>
@@ -166,7 +153,7 @@ EXPORT_SYMBOL(pn_sock_unhash);
static DEFINE_MUTEX(port_mutex);
-static int pn_socket_bind(struct socket *sock, struct sockaddr *addr, int len)
+static int pn_socket_bind(struct socket *sock, struct sockaddr_unsized *addr, int len)
{
struct sock *sk = sock->sk;
struct pn_sock *pn = pn_sk(sk);
@@ -219,16 +206,16 @@ static int pn_socket_autobind(struct socket *sock)
memset(&sa, 0, sizeof(sa));
sa.spn_family = AF_PHONET;
- err = pn_socket_bind(sock, (struct sockaddr *)&sa,
- sizeof(struct sockaddr_pn));
+ err = pn_socket_bind(sock, (struct sockaddr_unsized *)&sa,
+ sizeof(struct sockaddr_pn));
if (err != -EINVAL)
return err;
BUG_ON(!pn_port(pn_sk(sock->sk)->sobject));
return 0; /* socket was already bound */
}
-static int pn_socket_connect(struct socket *sock, struct sockaddr *addr,
- int len, int flags)
+static int pn_socket_connect(struct socket *sock, struct sockaddr_unsized *addr,
+ int len, int flags)
{
struct sock *sk = sock->sk;
struct pn_sock *pn = pn_sk(sk);
@@ -305,18 +292,17 @@ out:
}
static int pn_socket_accept(struct socket *sock, struct socket *newsock,
- int flags, bool kern)
+ struct proto_accept_arg *arg)
{
struct sock *sk = sock->sk;
struct sock *newsk;
- int err;
if (unlikely(sk->sk_state != TCP_LISTEN))
return -EINVAL;
- newsk = sk->sk_prot->accept(sk, flags, &err, kern);
+ newsk = sk->sk_prot->accept(sk, arg);
if (!newsk)
- return err;
+ return arg->err;
lock_sock(newsk);
sock_graft(newsk, newsock);
@@ -326,7 +312,7 @@ static int pn_socket_accept(struct socket *sock, struct socket *newsock,
}
static int pn_socket_getname(struct socket *sock, struct sockaddr *addr,
- int *sockaddr_len, int peer)
+ int peer)
{
struct sock *sk = sock->sk;
struct pn_sock *pn = pn_sk(sk);
@@ -337,32 +323,31 @@ static int pn_socket_getname(struct socket *sock, struct sockaddr *addr,
pn_sockaddr_set_object((struct sockaddr_pn *)addr,
pn->sobject);
- *sockaddr_len = sizeof(struct sockaddr_pn);
- return 0;
+ return sizeof(struct sockaddr_pn);
}
-static unsigned int pn_socket_poll(struct file *file, struct socket *sock,
+static __poll_t pn_socket_poll(struct file *file, struct socket *sock,
poll_table *wait)
{
struct sock *sk = sock->sk;
struct pep_sock *pn = pep_sk(sk);
- unsigned int mask = 0;
+ __poll_t mask = 0;
poll_wait(file, sk_sleep(sk), wait);
if (sk->sk_state == TCP_CLOSE)
- return POLLERR;
- if (!skb_queue_empty(&sk->sk_receive_queue))
- mask |= POLLIN | POLLRDNORM;
- if (!skb_queue_empty(&pn->ctrlreq_queue))
- mask |= POLLPRI;
+ return EPOLLERR;
+ if (!skb_queue_empty_lockless(&sk->sk_receive_queue))
+ mask |= EPOLLIN | EPOLLRDNORM;
+ if (!skb_queue_empty_lockless(&pn->ctrlreq_queue))
+ mask |= EPOLLPRI;
if (!mask && sk->sk_state == TCP_CLOSE_WAIT)
- return POLLHUP;
+ return EPOLLHUP;
if (sk->sk_state == TCP_ESTABLISHED &&
refcount_read(&sk->sk_wmem_alloc) < sk->sk_sndbuf &&
atomic_read(&pn->tx_credits))
- mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
+ mask |= EPOLLOUT | EPOLLWRNORM | EPOLLWRBAND;
return mask;
}
@@ -393,8 +378,7 @@ static int pn_socket_ioctl(struct socket *sock, unsigned int cmd,
saddr = PN_NO_ADDR;
release_sock(sk);
- if (dev)
- dev_put(dev);
+ dev_put(dev);
if (saddr == PN_NO_ADDR)
return -EHOSTUNREACH;
@@ -402,7 +386,7 @@ static int pn_socket_ioctl(struct socket *sock, unsigned int cmd,
return put_user(handle, (__u16 __user *)arg);
}
- return sk->sk_prot->ioctl(sk, cmd, arg);
+ return sk_ioctl(sk, cmd, (void __user *)arg);
}
static int pn_socket_listen(struct socket *sock, int backlog)
@@ -453,16 +437,9 @@ const struct proto_ops phonet_dgram_ops = {
.ioctl = pn_socket_ioctl,
.listen = sock_no_listen,
.shutdown = sock_no_shutdown,
- .setsockopt = sock_no_setsockopt,
- .getsockopt = sock_no_getsockopt,
-#ifdef CONFIG_COMPAT
- .compat_setsockopt = sock_no_setsockopt,
- .compat_getsockopt = sock_no_getsockopt,
-#endif
.sendmsg = pn_socket_sendmsg,
.recvmsg = sock_common_recvmsg,
.mmap = sock_no_mmap,
- .sendpage = sock_no_sendpage,
};
const struct proto_ops phonet_stream_ops = {
@@ -480,14 +457,9 @@ const struct proto_ops phonet_stream_ops = {
.shutdown = sock_no_shutdown,
.setsockopt = sock_common_setsockopt,
.getsockopt = sock_common_getsockopt,
-#ifdef CONFIG_COMPAT
- .compat_setsockopt = compat_sock_common_setsockopt,
- .compat_getsockopt = compat_sock_common_getsockopt,
-#endif
.sendmsg = pn_socket_sendmsg,
.recvmsg = sock_common_recvmsg,
.mmap = sock_no_mmap,
- .sendpage = sock_no_sendpage,
};
EXPORT_SYMBOL(phonet_stream_ops);
@@ -608,43 +580,29 @@ static int pn_sock_seq_show(struct seq_file *seq, void *v)
struct pn_sock *pn = pn_sk(sk);
seq_printf(seq, "%2d %04X:%04X:%02X %02X %08X:%08X %5d %lu "
- "%d %pK %d",
+ "%d %pK %u",
sk->sk_protocol, pn->sobject, pn->dobject,
pn->resource, sk->sk_state,
sk_wmem_alloc_get(sk), sk_rmem_alloc_get(sk),
- from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)),
+ from_kuid_munged(seq_user_ns(seq), sk_uid(sk)),
sock_i_ino(sk),
refcount_read(&sk->sk_refcnt), sk,
- atomic_read(&sk->sk_drops));
+ sk_drops_read(sk));
}
seq_pad(seq, '\n');
return 0;
}
-static const struct seq_operations pn_sock_seq_ops = {
+const struct seq_operations pn_sock_seq_ops = {
.start = pn_sock_seq_start,
.next = pn_sock_seq_next,
.stop = pn_sock_seq_stop,
.show = pn_sock_seq_show,
};
-
-static int pn_sock_open(struct inode *inode, struct file *file)
-{
- return seq_open_net(inode, file, &pn_sock_seq_ops,
- sizeof(struct seq_net_private));
-}
-
-const struct file_operations pn_sock_seq_fops = {
- .owner = THIS_MODULE,
- .open = pn_sock_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = seq_release_net,
-};
#endif
static struct {
- struct sock *sk[256];
+ struct sock __rcu *sk[256];
} pnres;
/*
@@ -696,7 +654,7 @@ int pn_sock_unbind_res(struct sock *sk, u8 res)
return -EPERM;
mutex_lock(&resource_mutex);
- if (pnres.sk[res] == sk) {
+ if (rcu_access_pointer(pnres.sk[res]) == sk) {
RCU_INIT_POINTER(pnres.sk[res], NULL);
ret = 0;
}
@@ -715,7 +673,7 @@ void pn_sock_unbind_all_res(struct sock *sk)
mutex_lock(&resource_mutex);
for (res = 0; res < 256; res++) {
- if (pnres.sk[res] == sk) {
+ if (rcu_access_pointer(pnres.sk[res]) == sk) {
RCU_INIT_POINTER(pnres.sk[res], NULL);
match++;
}
@@ -730,7 +688,7 @@ void pn_sock_unbind_all_res(struct sock *sk)
}
#ifdef CONFIG_PROC_FS
-static struct sock **pn_res_get_idx(struct seq_file *seq, loff_t pos)
+static struct sock __rcu **pn_res_get_idx(struct seq_file *seq, loff_t pos)
{
struct net *net = seq_file_net(seq);
unsigned int i;
@@ -739,7 +697,7 @@ static struct sock **pn_res_get_idx(struct seq_file *seq, loff_t pos)
return NULL;
for (i = 0; i < 256; i++) {
- if (pnres.sk[i] == NULL)
+ if (rcu_access_pointer(pnres.sk[i]) == NULL)
continue;
if (!pos)
return pnres.sk + i;
@@ -748,7 +706,7 @@ static struct sock **pn_res_get_idx(struct seq_file *seq, loff_t pos)
return NULL;
}
-static struct sock **pn_res_get_next(struct seq_file *seq, struct sock **sk)
+static struct sock __rcu **pn_res_get_next(struct seq_file *seq, struct sock __rcu **sk)
{
struct net *net = seq_file_net(seq);
unsigned int i;
@@ -770,7 +728,7 @@ static void *pn_res_seq_start(struct seq_file *seq, loff_t *pos)
static void *pn_res_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
- struct sock **sk;
+ struct sock __rcu **sk;
if (v == SEQ_START_TOKEN)
sk = pn_res_get_idx(seq, 0);
@@ -789,39 +747,26 @@ static void pn_res_seq_stop(struct seq_file *seq, void *v)
static int pn_res_seq_show(struct seq_file *seq, void *v)
{
seq_setwidth(seq, 63);
- if (v == SEQ_START_TOKEN)
+ if (v == SEQ_START_TOKEN) {
seq_puts(seq, "rs uid inode");
- else {
- struct sock **psk = v;
- struct sock *sk = *psk;
+ } else {
+ struct sock __rcu **psk = v;
+ struct sock *sk = rcu_dereference_protected(*psk,
+ lockdep_is_held(&resource_mutex));
seq_printf(seq, "%02X %5u %lu",
(int) (psk - pnres.sk),
- from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)),
+ from_kuid_munged(seq_user_ns(seq), sk_uid(sk)),
sock_i_ino(sk));
}
seq_pad(seq, '\n');
return 0;
}
-static const struct seq_operations pn_res_seq_ops = {
+const struct seq_operations pn_res_seq_ops = {
.start = pn_res_seq_start,
.next = pn_res_seq_next,
.stop = pn_res_seq_stop,
.show = pn_res_seq_show,
};
-
-static int pn_res_open(struct inode *inode, struct file *file)
-{
- return seq_open_net(inode, file, &pn_res_seq_ops,
- sizeof(struct seq_net_private));
-}
-
-const struct file_operations pn_res_seq_fops = {
- .owner = THIS_MODULE,
- .open = pn_res_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = seq_release_net,
-};
#endif
generated by cgit (git 2.34.1) at 2025-12-24 23:41:46 +0000