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Diffstat (limited to 'net/core')
-rw-r--r--net/core/dev_addr_lists.c6
-rw-r--r--net/core/net-procfs.c24
-rw-r--r--net/core/rtnetlink.c2
-rw-r--r--net/core/sock.c52
4 files changed, 46 insertions, 38 deletions
diff --git a/net/core/dev_addr_lists.c b/net/core/dev_addr_lists.c
index 8c39283c26ae..f0cb38344126 100644
--- a/net/core/dev_addr_lists.c
+++ b/net/core/dev_addr_lists.c
@@ -50,6 +50,11 @@ static int __hw_addr_add_ex(struct netdev_hw_addr_list *list,
if (addr_len > MAX_ADDR_LEN)
return -EINVAL;
+ ha = list_first_entry(&list->list, struct netdev_hw_addr, list);
+ if (ha && !memcmp(addr, ha->addr, addr_len) &&
+ (!addr_type || addr_type == ha->type))
+ goto found_it;
+
while (*ins_point) {
int diff;
@@ -64,6 +69,7 @@ static int __hw_addr_add_ex(struct netdev_hw_addr_list *list,
} else if (diff > 0) {
ins_point = &parent->rb_right;
} else {
+found_it:
if (exclusive)
return -EEXIST;
if (global) {
diff --git a/net/core/net-procfs.c b/net/core/net-procfs.c
index eab5fc88a002..d8b9dbabd4a4 100644
--- a/net/core/net-procfs.c
+++ b/net/core/net-procfs.c
@@ -77,8 +77,8 @@ static void dev_seq_printf_stats(struct seq_file *seq, struct net_device *dev)
struct rtnl_link_stats64 temp;
const struct rtnl_link_stats64 *stats = dev_get_stats(dev, &temp);
- seq_printf(seq, "%9s: %16llu %12llu %4llu %6llu %4llu %5llu %10llu %9llu "
- "%16llu %12llu %4llu %6llu %4llu %5llu %7llu %10llu\n",
+ seq_printf(seq, "%6s: %7llu %7llu %4llu %4llu %4llu %5llu %10llu %9llu "
+ "%8llu %7llu %4llu %4llu %4llu %5llu %7llu %10llu\n",
dev->name, stats->rx_bytes, stats->rx_packets,
stats->rx_errors,
stats->rx_dropped + stats->rx_missed_errors,
@@ -103,11 +103,11 @@ static void dev_seq_printf_stats(struct seq_file *seq, struct net_device *dev)
static int dev_seq_show(struct seq_file *seq, void *v)
{
if (v == SEQ_START_TOKEN)
- seq_puts(seq, "Interface| Receive "
- " | Transmit\n"
- " | bytes packets errs drop fifo frame "
- "compressed multicast| bytes packets errs "
- " drop fifo colls carrier compressed\n");
+ seq_puts(seq, "Inter-| Receive "
+ " | Transmit\n"
+ " face |bytes packets errs drop fifo frame "
+ "compressed multicast|bytes packets errs "
+ "drop fifo colls carrier compressed\n");
else
dev_seq_printf_stats(seq, v);
return 0;
@@ -259,14 +259,14 @@ static int ptype_seq_show(struct seq_file *seq, void *v)
struct packet_type *pt = v;
if (v == SEQ_START_TOKEN)
- seq_puts(seq, "Type Device Function\n");
+ seq_puts(seq, "Type Device Function\n");
else if (pt->dev == NULL || dev_net(pt->dev) == seq_file_net(seq)) {
if (pt->type == htons(ETH_P_ALL))
seq_puts(seq, "ALL ");
else
seq_printf(seq, "%04x", ntohs(pt->type));
- seq_printf(seq, " %-9s %ps\n",
+ seq_printf(seq, " %-8s %ps\n",
pt->dev ? pt->dev->name : "", pt->func);
}
@@ -327,14 +327,12 @@ static int dev_mc_seq_show(struct seq_file *seq, void *v)
struct netdev_hw_addr *ha;
struct net_device *dev = v;
- if (v == SEQ_START_TOKEN) {
- seq_puts(seq, "Ifindex Interface Refcount Global_use Address\n");
+ if (v == SEQ_START_TOKEN)
return 0;
- }
netif_addr_lock_bh(dev);
netdev_for_each_mc_addr(ha, dev) {
- seq_printf(seq, "%-7d %-9s %-8d %-10d %*phN\n",
+ seq_printf(seq, "%-4d %-15s %-5d %-5d %*phN\n",
dev->ifindex, dev->name,
ha->refcount, ha->global_use,
(int)dev->addr_len, ha->addr);
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 972c8cb303a5..8ccce85562a1 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -5262,7 +5262,7 @@ nla_put_failure:
static size_t if_nlmsg_stats_size(const struct net_device *dev,
u32 filter_mask)
{
- size_t size = 0;
+ size_t size = NLMSG_ALIGN(sizeof(struct if_stats_msg));
if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, 0))
size += nla_total_size_64bit(sizeof(struct rtnl_link_stats64));
diff --git a/net/core/sock.c b/net/core/sock.c
index 512e629f9780..c1601f75ec4b 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -1376,6 +1376,16 @@ set_sndbuf:
}
EXPORT_SYMBOL(sock_setsockopt);
+static const struct cred *sk_get_peer_cred(struct sock *sk)
+{
+ const struct cred *cred;
+
+ spin_lock(&sk->sk_peer_lock);
+ cred = get_cred(sk->sk_peer_cred);
+ spin_unlock(&sk->sk_peer_lock);
+
+ return cred;
+}
static void cred_to_ucred(struct pid *pid, const struct cred *cred,
struct ucred *ucred)
@@ -1552,7 +1562,11 @@ int sock_getsockopt(struct socket *sock, int level, int optname,
struct ucred peercred;
if (len > sizeof(peercred))
len = sizeof(peercred);
+
+ spin_lock(&sk->sk_peer_lock);
cred_to_ucred(sk->sk_peer_pid, sk->sk_peer_cred, &peercred);
+ spin_unlock(&sk->sk_peer_lock);
+
if (copy_to_user(optval, &peercred, len))
return -EFAULT;
goto lenout;
@@ -1560,20 +1574,23 @@ int sock_getsockopt(struct socket *sock, int level, int optname,
case SO_PEERGROUPS:
{
+ const struct cred *cred;
int ret, n;
- if (!sk->sk_peer_cred)
+ cred = sk_get_peer_cred(sk);
+ if (!cred)
return -ENODATA;
- n = sk->sk_peer_cred->group_info->ngroups;
+ n = cred->group_info->ngroups;
if (len < n * sizeof(gid_t)) {
len = n * sizeof(gid_t);
+ put_cred(cred);
return put_user(len, optlen) ? -EFAULT : -ERANGE;
}
len = n * sizeof(gid_t);
- ret = groups_to_user((gid_t __user *)optval,
- sk->sk_peer_cred->group_info);
+ ret = groups_to_user((gid_t __user *)optval, cred->group_info);
+ put_cred(cred);
if (ret)
return ret;
goto lenout;
@@ -1935,9 +1952,10 @@ static void __sk_destruct(struct rcu_head *head)
sk->sk_frag.page = NULL;
}
- if (sk->sk_peer_cred)
- put_cred(sk->sk_peer_cred);
+ /* We do not need to acquire sk->sk_peer_lock, we are the last user. */
+ put_cred(sk->sk_peer_cred);
put_pid(sk->sk_peer_pid);
+
if (likely(sk->sk_net_refcnt))
put_net(sock_net(sk));
sk_prot_free(sk->sk_prot_creator, sk);
@@ -3145,6 +3163,8 @@ void sock_init_data(struct socket *sock, struct sock *sk)
sk->sk_peer_pid = NULL;
sk->sk_peer_cred = NULL;
+ spin_lock_init(&sk->sk_peer_lock);
+
sk->sk_write_pending = 0;
sk->sk_rcvlowat = 1;
sk->sk_rcvtimeo = MAX_SCHEDULE_TIMEOUT;
@@ -3210,24 +3230,8 @@ void release_sock(struct sock *sk)
}
EXPORT_SYMBOL(release_sock);
-/**
- * lock_sock_fast - fast version of lock_sock
- * @sk: socket
- *
- * This version should be used for very small section, where process wont block
- * return false if fast path is taken:
- *
- * sk_lock.slock locked, owned = 0, BH disabled
- *
- * return true if slow path is taken:
- *
- * sk_lock.slock unlocked, owned = 1, BH enabled
- */
-bool lock_sock_fast(struct sock *sk) __acquires(&sk->sk_lock.slock)
+bool __lock_sock_fast(struct sock *sk) __acquires(&sk->sk_lock.slock)
{
- /* The sk_lock has mutex_lock() semantics here. */
- mutex_acquire(&sk->sk_lock.dep_map, 0, 0, _RET_IP_);
-
might_sleep();
spin_lock_bh(&sk->sk_lock.slock);
@@ -3256,7 +3260,7 @@ bool lock_sock_fast(struct sock *sk) __acquires(&sk->sk_lock.slock)
spin_unlock_bh(&sk->sk_lock.slock);
return true;
}
-EXPORT_SYMBOL(lock_sock_fast);
+EXPORT_SYMBOL(__lock_sock_fast);
int sock_gettstamp(struct socket *sock, void __user *userstamp,
bool timeval, bool time32)
generated by cgit (git 2.34.1) at 2025-10-04 03:35:53 +0000