diff options
Diffstat (limited to 'net/core')
-rw-r--r-- | net/core/dev.c | 6 | ||||
-rw-r--r-- | net/core/dev_ioctl.c | 13 | ||||
-rw-r--r-- | net/core/ethtool.c | 5 | ||||
-rw-r--r-- | net/core/filter.c | 31 | ||||
-rw-r--r-- | net/core/rtnetlink.c | 13 | ||||
-rw-r--r-- | net/core/skbuff.c | 6 | ||||
-rw-r--r-- | net/core/sock.c | 8 | ||||
-rw-r--r-- | net/core/sock_reuseport.c | 12 |
8 files changed, 62 insertions, 32 deletions
diff --git a/net/core/dev.c b/net/core/dev.c index 588b473194a8..11596a302a26 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -1147,9 +1147,8 @@ static int dev_alloc_name_ns(struct net *net, return ret; } -static int dev_get_valid_name(struct net *net, - struct net_device *dev, - const char *name) +int dev_get_valid_name(struct net *net, struct net_device *dev, + const char *name) { BUG_ON(!net); @@ -1165,6 +1164,7 @@ static int dev_get_valid_name(struct net *net, return 0; } +EXPORT_SYMBOL(dev_get_valid_name); /** * dev_change_name - change name of a device diff --git a/net/core/dev_ioctl.c b/net/core/dev_ioctl.c index 709a4e6fb447..f9c7a88cd981 100644 --- a/net/core/dev_ioctl.c +++ b/net/core/dev_ioctl.c @@ -303,7 +303,18 @@ static int dev_ifsioc(struct net *net, struct ifreq *ifr, unsigned int cmd) case SIOCSIFTXQLEN: if (ifr->ifr_qlen < 0) return -EINVAL; - dev->tx_queue_len = ifr->ifr_qlen; + if (dev->tx_queue_len ^ ifr->ifr_qlen) { + unsigned int orig_len = dev->tx_queue_len; + + dev->tx_queue_len = ifr->ifr_qlen; + err = call_netdevice_notifiers( + NETDEV_CHANGE_TX_QUEUE_LEN, dev); + err = notifier_to_errno(err); + if (err) { + dev->tx_queue_len = orig_len; + return err; + } + } return 0; case SIOCSIFNAME: diff --git a/net/core/ethtool.c b/net/core/ethtool.c index 3228411ada0f..9a9a3d77e327 100644 --- a/net/core/ethtool.c +++ b/net/core/ethtool.c @@ -436,7 +436,7 @@ bool ethtool_convert_link_mode_to_legacy_u32(u32 *legacy_u32, EXPORT_SYMBOL(ethtool_convert_link_mode_to_legacy_u32); /* return false if legacy contained non-0 deprecated fields - * transceiver/maxtxpkt/maxrxpkt. rest of ksettings always updated + * maxtxpkt/maxrxpkt. rest of ksettings always updated */ static bool convert_legacy_settings_to_link_ksettings( @@ -451,8 +451,7 @@ convert_legacy_settings_to_link_ksettings( * deprecated legacy fields, and they should not use * %ETHTOOL_GLINKSETTINGS/%ETHTOOL_SLINKSETTINGS */ - if (legacy_settings->transceiver || - legacy_settings->maxtxpkt || + if (legacy_settings->maxtxpkt || legacy_settings->maxrxpkt) retval = false; diff --git a/net/core/filter.c b/net/core/filter.c index 74b8c91fb5f4..aa0265997f93 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -1839,31 +1839,31 @@ static const struct bpf_func_proto bpf_redirect_proto = { .arg2_type = ARG_ANYTHING, }; -BPF_CALL_3(bpf_sk_redirect_map, struct bpf_map *, map, u32, key, u64, flags) +BPF_CALL_4(bpf_sk_redirect_map, struct sk_buff *, skb, + struct bpf_map *, map, u32, key, u64, flags) { - struct redirect_info *ri = this_cpu_ptr(&redirect_info); + struct tcp_skb_cb *tcb = TCP_SKB_CB(skb); if (unlikely(flags)) return SK_ABORTED; - ri->ifindex = key; - ri->flags = flags; - ri->map = map; + tcb->bpf.key = key; + tcb->bpf.flags = flags; + tcb->bpf.map = map; return SK_REDIRECT; } -struct sock *do_sk_redirect_map(void) +struct sock *do_sk_redirect_map(struct sk_buff *skb) { - struct redirect_info *ri = this_cpu_ptr(&redirect_info); + struct tcp_skb_cb *tcb = TCP_SKB_CB(skb); struct sock *sk = NULL; - if (ri->map) { - sk = __sock_map_lookup_elem(ri->map, ri->ifindex); + if (tcb->bpf.map) { + sk = __sock_map_lookup_elem(tcb->bpf.map, tcb->bpf.key); - ri->ifindex = 0; - ri->map = NULL; - /* we do not clear flags for future lookup */ + tcb->bpf.key = 0; + tcb->bpf.map = NULL; } return sk; @@ -1873,9 +1873,10 @@ static const struct bpf_func_proto bpf_sk_redirect_map_proto = { .func = bpf_sk_redirect_map, .gpl_only = false, .ret_type = RET_INTEGER, - .arg1_type = ARG_CONST_MAP_PTR, - .arg2_type = ARG_ANYTHING, + .arg1_type = ARG_PTR_TO_CTX, + .arg2_type = ARG_CONST_MAP_PTR, .arg3_type = ARG_ANYTHING, + .arg4_type = ARG_ANYTHING, }; BPF_CALL_1(bpf_get_cgroup_classid, const struct sk_buff *, skb) @@ -3683,7 +3684,6 @@ static bool sk_skb_is_valid_access(int off, int size, { if (type == BPF_WRITE) { switch (off) { - case bpf_ctx_range(struct __sk_buff, mark): case bpf_ctx_range(struct __sk_buff, tc_index): case bpf_ctx_range(struct __sk_buff, priority): break; @@ -3693,6 +3693,7 @@ static bool sk_skb_is_valid_access(int off, int size, } switch (off) { + case bpf_ctx_range(struct __sk_buff, mark): case bpf_ctx_range(struct __sk_buff, tc_classid): return false; case bpf_ctx_range(struct __sk_buff, data): diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c index d4bcdcc68e92..5ace48926b19 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -1483,7 +1483,10 @@ static const struct nla_policy ifla_policy[IFLA_MAX+1] = { [IFLA_LINKINFO] = { .type = NLA_NESTED }, [IFLA_NET_NS_PID] = { .type = NLA_U32 }, [IFLA_NET_NS_FD] = { .type = NLA_U32 }, - [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 }, + /* IFLA_IFALIAS is a string, but policy is set to NLA_BINARY to + * allow 0-length string (needed to remove an alias). + */ + [IFLA_IFALIAS] = { .type = NLA_BINARY, .len = IFALIASZ - 1 }, [IFLA_VFINFO_LIST] = {. type = NLA_NESTED }, [IFLA_VF_PORTS] = { .type = NLA_NESTED }, [IFLA_PORT_SELF] = { .type = NLA_NESTED }, @@ -2093,7 +2096,7 @@ static int do_setlink(const struct sk_buff *skb, dev->tx_queue_len = orig_len; goto errout; } - status |= DO_SETLINK_NOTIFY; + status |= DO_SETLINK_MODIFIED; } } @@ -2248,7 +2251,7 @@ static int do_setlink(const struct sk_buff *skb, errout: if (status & DO_SETLINK_MODIFIED) { - if (status & DO_SETLINK_NOTIFY) + if ((status & DO_SETLINK_NOTIFY) == DO_SETLINK_NOTIFY) netdev_state_change(dev); if (err < 0) @@ -4279,13 +4282,17 @@ static int rtnetlink_event(struct notifier_block *this, unsigned long event, voi switch (event) { case NETDEV_REBOOT: + case NETDEV_CHANGEMTU: case NETDEV_CHANGEADDR: case NETDEV_CHANGENAME: case NETDEV_FEAT_CHANGE: case NETDEV_BONDING_FAILOVER: + case NETDEV_POST_TYPE_CHANGE: case NETDEV_NOTIFY_PEERS: + case NETDEV_CHANGEUPPER: case NETDEV_RESEND_IGMP: case NETDEV_CHANGEINFODATA: + case NETDEV_CHANGE_TX_QUEUE_LEN: rtmsg_ifinfo_event(RTM_NEWLINK, dev, 0, rtnl_get_event(event), GFP_KERNEL); break; diff --git a/net/core/skbuff.c b/net/core/skbuff.c index 16982de649b9..24656076906d 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -1124,9 +1124,13 @@ int skb_zerocopy_iter_stream(struct sock *sk, struct sk_buff *skb, err = __zerocopy_sg_from_iter(sk, skb, &msg->msg_iter, len); if (err == -EFAULT || (err == -EMSGSIZE && skb->len == orig_len)) { + struct sock *save_sk = skb->sk; + /* Streams do not free skb on error. Reset to prev state. */ msg->msg_iter = orig_iter; + skb->sk = sk; ___pskb_trim(skb, orig_len); + skb->sk = save_sk; return err; } @@ -1896,7 +1900,7 @@ void *__pskb_pull_tail(struct sk_buff *skb, int delta) } /* If we need update frag list, we are in troubles. - * Certainly, it possible to add an offset to skb data, + * Certainly, it is possible to add an offset to skb data, * but taking into account that pulling is expected to * be very rare operation, it is worth to fight against * further bloating skb head and crucify ourselves here instead. diff --git a/net/core/sock.c b/net/core/sock.c index 23953b741a41..415f441c63b9 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -1677,12 +1677,17 @@ struct sock *sk_clone_lock(const struct sock *sk, const gfp_t priority) newsk->sk_dst_pending_confirm = 0; newsk->sk_wmem_queued = 0; newsk->sk_forward_alloc = 0; + + /* sk->sk_memcg will be populated at accept() time */ + newsk->sk_memcg = NULL; + atomic_set(&newsk->sk_drops, 0); newsk->sk_send_head = NULL; newsk->sk_userlocks = sk->sk_userlocks & ~SOCK_BINDPORT_LOCK; atomic_set(&newsk->sk_zckey, 0); sock_reset_flag(newsk, SOCK_DONE); + cgroup_sk_alloc(&newsk->sk_cgrp_data); rcu_read_lock(); filter = rcu_dereference(sk->sk_filter); @@ -1714,9 +1719,6 @@ struct sock *sk_clone_lock(const struct sock *sk, const gfp_t priority) newsk->sk_incoming_cpu = raw_smp_processor_id(); atomic64_set(&newsk->sk_cookie, 0); - mem_cgroup_sk_alloc(newsk); - cgroup_sk_alloc(&newsk->sk_cgrp_data); - /* * Before updating sk_refcnt, we must commit prior changes to memory * (Documentation/RCU/rculist_nulls.txt for details) diff --git a/net/core/sock_reuseport.c b/net/core/sock_reuseport.c index eed1ebf7f29d..b1e0dbea1e8c 100644 --- a/net/core/sock_reuseport.c +++ b/net/core/sock_reuseport.c @@ -36,9 +36,14 @@ int reuseport_alloc(struct sock *sk) * soft irq of receive path or setsockopt from process context */ spin_lock_bh(&reuseport_lock); - WARN_ONCE(rcu_dereference_protected(sk->sk_reuseport_cb, - lockdep_is_held(&reuseport_lock)), - "multiple allocations for the same socket"); + + /* Allocation attempts can occur concurrently via the setsockopt path + * and the bind/hash path. Nothing to do when we lose the race. + */ + if (rcu_dereference_protected(sk->sk_reuseport_cb, + lockdep_is_held(&reuseport_lock))) + goto out; + reuse = __reuseport_alloc(INIT_SOCKS); if (!reuse) { spin_unlock_bh(&reuseport_lock); @@ -49,6 +54,7 @@ int reuseport_alloc(struct sock *sk) reuse->num_socks = 1; rcu_assign_pointer(sk->sk_reuseport_cb, reuse); +out: spin_unlock_bh(&reuseport_lock); return 0; |