diff options
| -rw-r--r-- | include/uapi/linux/tipc_netlink.h | 19 | ||||
| -rw-r--r-- | include/uapi/linux/tipc_sockets_diag.h | 17 | ||||
| -rw-r--r-- | net/tipc/Kconfig | 8 | ||||
| -rw-r--r-- | net/tipc/Makefile | 5 | ||||
| -rw-r--r-- | net/tipc/diag.c | 114 | ||||
| -rw-r--r-- | net/tipc/socket.c | 134 | ||||
| -rw-r--r-- | net/tipc/socket.h | 10 |
7 files changed, 281 insertions, 26 deletions
diff --git a/include/uapi/linux/tipc_netlink.h b/include/uapi/linux/tipc_netlink.h index 469aa67a5ecb..d896ded51bcb 100644 --- a/include/uapi/linux/tipc_netlink.h +++ b/include/uapi/linux/tipc_netlink.h @@ -114,6 +114,13 @@ enum { TIPC_NLA_SOCK_REF, /* u32 */ TIPC_NLA_SOCK_CON, /* nest */ TIPC_NLA_SOCK_HAS_PUBL, /* flag */ + TIPC_NLA_SOCK_STAT, /* nest */ + TIPC_NLA_SOCK_TYPE, /* u32 */ + TIPC_NLA_SOCK_INO, /* u32 */ + TIPC_NLA_SOCK_UID, /* u32 */ + TIPC_NLA_SOCK_TIPC_STATE, /* u32 */ + TIPC_NLA_SOCK_COOKIE, /* u64 */ + TIPC_NLA_SOCK_PAD, /* flag */ __TIPC_NLA_SOCK_MAX, TIPC_NLA_SOCK_MAX = __TIPC_NLA_SOCK_MAX - 1 @@ -238,6 +245,18 @@ enum { TIPC_NLA_CON_MAX = __TIPC_NLA_CON_MAX - 1 }; +/* Nest, socket statistics info */ +enum { + TIPC_NLA_SOCK_STAT_RCVQ, /* u32 */ + TIPC_NLA_SOCK_STAT_SENDQ, /* u32 */ + TIPC_NLA_SOCK_STAT_LINK_CONG, /* flag */ + TIPC_NLA_SOCK_STAT_CONN_CONG, /* flag */ + TIPC_NLA_SOCK_STAT_DROP, /* u32 */ + + __TIPC_NLA_SOCK_STAT_MAX, + TIPC_NLA_SOCK_STAT_MAX = __TIPC_NLA_SOCK_STAT_MAX - 1 +}; + /* Nest, link propreties. Valid for link, media and bearer */ enum { TIPC_NLA_PROP_UNSPEC, diff --git a/include/uapi/linux/tipc_sockets_diag.h b/include/uapi/linux/tipc_sockets_diag.h new file mode 100644 index 000000000000..7678cf2f0dcc --- /dev/null +++ b/include/uapi/linux/tipc_sockets_diag.h @@ -0,0 +1,17 @@ +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ +/* AF_TIPC sock_diag interface for querying open sockets */ + +#ifndef _UAPI__TIPC_SOCKETS_DIAG_H__ +#define _UAPI__TIPC_SOCKETS_DIAG_H__ + +#include <linux/types.h> +#include <linux/sock_diag.h> + +/* Request */ +struct tipc_sock_diag_req { + __u8 sdiag_family; /* must be AF_TIPC */ + __u8 sdiag_protocol; /* must be 0 */ + __u16 pad; /* must be 0 */ + __u32 tidiag_states; /* query*/ +}; +#endif /* _UAPI__TIPC_SOCKETS_DIAG_H__ */ diff --git a/net/tipc/Kconfig b/net/tipc/Kconfig index c25a3a149dc4..e450212121d2 100644 --- a/net/tipc/Kconfig +++ b/net/tipc/Kconfig @@ -34,3 +34,11 @@ config TIPC_MEDIA_UDP Saying Y here will enable support for running TIPC over IP/UDP bool default y + +config TIPC_DIAG + tristate "TIPC: socket monitoring interface" + depends on TIPC + default y + ---help--- + Support for TIPC socket monitoring interface used by ss tool. + If unsure, say Y. diff --git a/net/tipc/Makefile b/net/tipc/Makefile index 1edb7192aa2f..aca168f2abb1 100644 --- a/net/tipc/Makefile +++ b/net/tipc/Makefile @@ -14,3 +14,8 @@ tipc-y += addr.o bcast.o bearer.o \ tipc-$(CONFIG_TIPC_MEDIA_UDP) += udp_media.o tipc-$(CONFIG_TIPC_MEDIA_IB) += ib_media.o tipc-$(CONFIG_SYSCTL) += sysctl.o + + +obj-$(CONFIG_TIPC_DIAG) += diag.o + +tipc_diag-y := diag.o diff --git a/net/tipc/diag.c b/net/tipc/diag.c new file mode 100644 index 000000000000..46d9cd62f781 --- /dev/null +++ b/net/tipc/diag.c @@ -0,0 +1,114 @@ +/* + * net/tipc/diag.c: TIPC socket diag + * + * Copyright (c) 2018, Ericsson AB + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the names of the copyright holders nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * Alternatively, this software may be distributed under the terms of the + * GNU General Public License ("GPL") version 2 as published by the Free + * Software Foundation. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "ASIS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#include "core.h" +#include "socket.h" +#include <linux/sock_diag.h> +#include <linux/tipc_sockets_diag.h> + +static u64 __tipc_diag_gen_cookie(struct sock *sk) +{ + u32 res[2]; + + sock_diag_save_cookie(sk, res); + return *((u64 *)res); +} + +static int __tipc_add_sock_diag(struct sk_buff *skb, + struct netlink_callback *cb, + struct tipc_sock *tsk) +{ + struct tipc_sock_diag_req *req = nlmsg_data(cb->nlh); + struct nlmsghdr *nlh; + int err; + + nlh = nlmsg_put_answer(skb, cb, SOCK_DIAG_BY_FAMILY, 0, + NLM_F_MULTI); + if (!nlh) + return -EMSGSIZE; + + err = tipc_sk_fill_sock_diag(skb, tsk, req->tidiag_states, + __tipc_diag_gen_cookie); + if (err) + return err; + + nlmsg_end(skb, nlh); + return 0; +} + +static int tipc_diag_dump(struct sk_buff *skb, struct netlink_callback *cb) +{ + return tipc_nl_sk_walk(skb, cb, __tipc_add_sock_diag); +} + +static int tipc_sock_diag_handler_dump(struct sk_buff *skb, + struct nlmsghdr *h) +{ + int hdrlen = sizeof(struct tipc_sock_diag_req); + struct net *net = sock_net(skb->sk); + + if (nlmsg_len(h) < hdrlen) + return -EINVAL; + + if (h->nlmsg_flags & NLM_F_DUMP) { + struct netlink_dump_control c = { + .dump = tipc_diag_dump, + }; + netlink_dump_start(net->diag_nlsk, skb, h, &c); + return 0; + } + return -EOPNOTSUPP; +} + +static const struct sock_diag_handler tipc_sock_diag_handler = { + .family = AF_TIPC, + .dump = tipc_sock_diag_handler_dump, +}; + +static int __init tipc_diag_init(void) +{ + return sock_diag_register(&tipc_sock_diag_handler); +} + +static void __exit tipc_diag_exit(void) +{ + sock_diag_unregister(&tipc_sock_diag_handler); +} + +module_init(tipc_diag_init); +module_exit(tipc_diag_exit); + +MODULE_LICENSE("Dual BSD/GPL"); +MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, AF_TIPC); diff --git a/net/tipc/socket.c b/net/tipc/socket.c index a4a9148d4629..732ec894f69f 100644 --- a/net/tipc/socket.c +++ b/net/tipc/socket.c @@ -2122,8 +2122,10 @@ static void tipc_sk_filter_rcv(struct sock *sk, struct sk_buff *skb, (!sk_conn && msg_connected(hdr)) || (!grp && msg_in_group(hdr))) err = TIPC_ERR_NO_PORT; - else if (sk_rmem_alloc_get(sk) + skb->truesize >= limit) + else if (sk_rmem_alloc_get(sk) + skb->truesize >= limit) { + atomic_inc(&sk->sk_drops); err = TIPC_ERR_OVERLOAD; + } if (unlikely(err)) { tipc_skb_reject(net, err, skb, xmitq); @@ -2202,6 +2204,7 @@ static void tipc_sk_enqueue(struct sk_buff_head *inputq, struct sock *sk, /* Overload => reject message back to sender */ onode = tipc_own_addr(sock_net(sk)); + atomic_inc(&sk->sk_drops); if (tipc_msg_reverse(onode, &skb, TIPC_ERR_OVERLOAD)) __skb_queue_tail(xmitq, skb); break; @@ -3160,16 +3163,33 @@ msg_full: return -EMSGSIZE; } +static int __tipc_nl_add_sk_info(struct sk_buff *skb, struct tipc_sock + *tsk) +{ + struct net *net = sock_net(skb->sk); + struct tipc_net *tn = tipc_net(net); + struct sock *sk = &tsk->sk; + + if (nla_put_u32(skb, TIPC_NLA_SOCK_REF, tsk->portid) || + nla_put_u32(skb, TIPC_NLA_SOCK_ADDR, tn->own_addr)) + return -EMSGSIZE; + + if (tipc_sk_connected(sk)) { + if (__tipc_nl_add_sk_con(skb, tsk)) + return -EMSGSIZE; + } else if (!list_empty(&tsk->publications)) { + if (nla_put_flag(skb, TIPC_NLA_SOCK_HAS_PUBL)) + return -EMSGSIZE; + } + return 0; +} + /* Caller should hold socket lock for the passed tipc socket. */ static int __tipc_nl_add_sk(struct sk_buff *skb, struct netlink_callback *cb, struct tipc_sock *tsk) { - int err; - void *hdr; struct nlattr *attrs; - struct net *net = sock_net(skb->sk); - struct tipc_net *tn = net_generic(net, tipc_net_id); - struct sock *sk = &tsk->sk; + void *hdr; hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, &tipc_genl_family, NLM_F_MULTI, TIPC_NL_SOCK_GET); @@ -3179,19 +3199,10 @@ static int __tipc_nl_add_sk(struct sk_buff *skb, struct netlink_callback *cb, attrs = nla_nest_start(skb, TIPC_NLA_SOCK); if (!attrs) goto genlmsg_cancel; - if (nla_put_u32(skb, TIPC_NLA_SOCK_REF, tsk->portid)) - goto attr_msg_cancel; - if (nla_put_u32(skb, TIPC_NLA_SOCK_ADDR, tn->own_addr)) + + if (__tipc_nl_add_sk_info(skb, tsk)) goto attr_msg_cancel; - if (tipc_sk_connected(sk)) { - err = __tipc_nl_add_sk_con(skb, tsk); - if (err) - goto attr_msg_cancel; - } else if (!list_empty(&tsk->publications)) { - if (nla_put_flag(skb, TIPC_NLA_SOCK_HAS_PUBL)) - goto attr_msg_cancel; - } nla_nest_end(skb, attrs); genlmsg_end(skb, hdr); @@ -3205,16 +3216,19 @@ msg_cancel: return -EMSGSIZE; } -int tipc_nl_sk_dump(struct sk_buff *skb, struct netlink_callback *cb) +int tipc_nl_sk_walk(struct sk_buff *skb, struct netlink_callback *cb, + int (*skb_handler)(struct sk_buff *skb, + struct netlink_callback *cb, + struct tipc_sock *tsk)) { - int err; - struct tipc_sock *tsk; - const struct bucket_table *tbl; - struct rhash_head *pos; struct net *net = sock_net(skb->sk); - struct tipc_net *tn = net_generic(net, tipc_net_id); - u32 tbl_id = cb->args[0]; + struct tipc_net *tn = tipc_net(net); + const struct bucket_table *tbl; u32 prev_portid = cb->args[1]; + u32 tbl_id = cb->args[0]; + struct rhash_head *pos; + struct tipc_sock *tsk; + int err; rcu_read_lock(); tbl = rht_dereference_rcu((&tn->sk_rht)->tbl, &tn->sk_rht); @@ -3226,12 +3240,13 @@ int tipc_nl_sk_dump(struct sk_buff *skb, struct netlink_callback *cb) continue; } - err = __tipc_nl_add_sk(skb, cb, tsk); + err = skb_handler(skb, cb, tsk); if (err) { prev_portid = tsk->portid; spin_unlock_bh(&tsk->sk.sk_lock.slock); goto out; } + prev_portid = 0; spin_unlock_bh(&tsk->sk.sk_lock.slock); } @@ -3243,6 +3258,75 @@ out: return skb->len; } +EXPORT_SYMBOL(tipc_nl_sk_walk); + +int tipc_sk_fill_sock_diag(struct sk_buff *skb, struct tipc_sock *tsk, + u32 sk_filter_state, + u64 (*tipc_diag_gen_cookie)(struct sock *sk)) +{ + struct sock *sk = &tsk->sk; + struct nlattr *attrs; + struct nlattr *stat; + + /*filter response w.r.t sk_state*/ + if (!(sk_filter_state & (1 << sk->sk_state))) + return 0; + + attrs = nla_nest_start(skb, TIPC_NLA_SOCK); + if (!attrs) + goto msg_cancel; + + if (__tipc_nl_add_sk_info(skb, tsk)) + goto attr_msg_cancel; + + if (nla_put_u32(skb, TIPC_NLA_SOCK_TYPE, (u32)sk->sk_type) || + nla_put_u32(skb, TIPC_NLA_SOCK_TIPC_STATE, (u32)sk->sk_state) || + nla_put_u32(skb, TIPC_NLA_SOCK_INO, sock_i_ino(sk)) || + nla_put_u32(skb, TIPC_NLA_SOCK_UID, + from_kuid_munged(sk_user_ns(sk), sock_i_uid(sk))) || + nla_put_u64_64bit(skb, TIPC_NLA_SOCK_COOKIE, + tipc_diag_gen_cookie(sk), + TIPC_NLA_SOCK_PAD)) + goto attr_msg_cancel; + + stat = nla_nest_start(skb, TIPC_NLA_SOCK_STAT); + if (!stat) + goto attr_msg_cancel; + + if (nla_put_u32(skb, TIPC_NLA_SOCK_STAT_RCVQ, + skb_queue_len(&sk->sk_receive_queue)) || + nla_put_u32(skb, TIPC_NLA_SOCK_STAT_SENDQ, + skb_queue_len(&sk->sk_write_queue)) || + nla_put_u32(skb, TIPC_NLA_SOCK_STAT_DROP, + atomic_read(&sk->sk_drops))) + goto stat_msg_cancel; + + if (tsk->cong_link_cnt && + nla_put_flag(skb, TIPC_NLA_SOCK_STAT_LINK_CONG)) + goto stat_msg_cancel; + + if (tsk_conn_cong(tsk) && + nla_put_flag(skb, TIPC_NLA_SOCK_STAT_CONN_CONG)) + goto stat_msg_cancel; + + nla_nest_end(skb, stat); + nla_nest_end(skb, attrs); + + return 0; + +stat_msg_cancel: + nla_nest_cancel(skb, stat); +attr_msg_cancel: + nla_nest_cancel(skb, attrs); +msg_cancel: + return -EMSGSIZE; +} +EXPORT_SYMBOL(tipc_sk_fill_sock_diag); + +int tipc_nl_sk_dump(struct sk_buff *skb, struct netlink_callback *cb) +{ + return tipc_nl_sk_walk(skb, cb, __tipc_nl_add_sk); +} /* Caller should hold socket lock for the passed tipc socket. */ static int __tipc_nl_add_sk_publ(struct sk_buff *skb, diff --git a/net/tipc/socket.h b/net/tipc/socket.h index 06fb5944cf76..aae3fd4cd06c 100644 --- a/net/tipc/socket.h +++ b/net/tipc/socket.h @@ -49,6 +49,8 @@ #define RCVBUF_DEF (FLOWCTL_BLK_SZ * 1024 * 2) #define RCVBUF_MAX (FLOWCTL_BLK_SZ * 1024 * 16) +struct tipc_sock; + int tipc_socket_init(void); void tipc_socket_stop(void); void tipc_sk_rcv(struct net *net, struct sk_buff_head *inputq); @@ -59,5 +61,11 @@ int tipc_sk_rht_init(struct net *net); void tipc_sk_rht_destroy(struct net *net); int tipc_nl_sk_dump(struct sk_buff *skb, struct netlink_callback *cb); int tipc_nl_publ_dump(struct sk_buff *skb, struct netlink_callback *cb); - +int tipc_sk_fill_sock_diag(struct sk_buff *skb, struct tipc_sock *tsk, + u32 sk_filter_state, + u64 (*tipc_diag_gen_cookie)(struct sock *sk)); +int tipc_nl_sk_walk(struct sk_buff *skb, struct netlink_callback *cb, + int (*skb_handler)(struct sk_buff *skb, + struct netlink_callback *cb, + struct tipc_sock *tsk)); #endif |