cregit-Linux how code gets into the kernel

Release 4.11 net/tipc/socket.c

Directory: net/tipc
/*
 * net/tipc/socket.c: TIPC socket API
 *
 * Copyright (c) 2001-2007, 2012-2016, Ericsson AB
 * Copyright (c) 2004-2008, 2010-2013, Wind River Systems
 * 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 "AS IS"
 * 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 <linux/rhashtable.h>
#include <linux/sched/signal.h>

#include "core.h"
#include "name_table.h"
#include "node.h"
#include "link.h"
#include "name_distr.h"
#include "socket.h"
#include "bcast.h"
#include "netlink.h"


#define CONN_TIMEOUT_DEFAULT	8000	
/* default connect timeout = 8s */

#define CONN_PROBING_INTERVAL	msecs_to_jiffies(3600000)  
/* [ms] => 1 h */

#define TIPC_FWD_MSG		1

#define TIPC_MAX_PORT		0xffffffff

#define TIPC_MIN_PORT		1

enum {
	
TIPC_LISTEN = TCP_LISTEN,
	
TIPC_ESTABLISHED = TCP_ESTABLISHED,
	
TIPC_OPEN = TCP_CLOSE,
	
TIPC_DISCONNECTING = TCP_CLOSE_WAIT,
	
TIPC_CONNECTING = TCP_SYN_SENT,
};

/**
 * struct tipc_sock - TIPC socket structure
 * @sk: socket - interacts with 'port' and with user via the socket API
 * @conn_type: TIPC type used when connection was established
 * @conn_instance: TIPC instance used when connection was established
 * @published: non-zero if port has one or more associated names
 * @max_pkt: maximum packet size "hint" used when building messages sent by port
 * @portid: unique port identity in TIPC socket hash table
 * @phdr: preformatted message header used when sending messages
 * #cong_links: list of congested links
 * @publications: list of publications for port
 * @blocking_link: address of the congested link we are currently sleeping on
 * @pub_count: total # of publications port has made during its lifetime
 * @probing_state:
 * @conn_timeout: the time we can wait for an unresponded setup request
 * @dupl_rcvcnt: number of bytes counted twice, in both backlog and rcv queue
 * @cong_link_cnt: number of congested links
 * @sent_unacked: # messages sent by socket, and not yet acked by peer
 * @rcv_unacked: # messages read by user, but not yet acked back to peer
 * @peer: 'connected' peer for dgram/rdm
 * @node: hash table node
 * @mc_method: cookie for use between socket and broadcast layer
 * @rcu: rcu struct for tipc_sock
 */

struct tipc_sock {
	
struct sock sk;
	
u32 conn_type;
	
u32 conn_instance;
	
int published;
	
u32 max_pkt;
	
u32 portid;
	
struct tipc_msg phdr;
	
struct list_head cong_links;
	
struct list_head publications;
	
u32 pub_count;
	
uint conn_timeout;
	
atomic_t dupl_rcvcnt;
	
bool probe_unacked;
	
u16 cong_link_cnt;
	
u16 snt_unacked;
	
u16 snd_win;
	
u16 peer_caps;
	
u16 rcv_unacked;
	
u16 rcv_win;
	
struct sockaddr_tipc peer;
	
struct rhash_head node;
	
struct tipc_mc_method mc_method;
	
struct rcu_head rcu;
};

static int tipc_backlog_rcv(struct sock *sk, struct sk_buff *skb);
static void tipc_data_ready(struct sock *sk);
static void tipc_write_space(struct sock *sk);
static void tipc_sock_destruct(struct sock *sk);
static int tipc_release(struct socket *sock);
static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags,
		       bool kern);
static void tipc_sk_timeout(unsigned long data);
static int tipc_sk_publish(struct tipc_sock *tsk, uint scope,
			   struct tipc_name_seq const *seq);
static int tipc_sk_withdraw(struct tipc_sock *tsk, uint scope,
			    struct tipc_name_seq const *seq);
static struct tipc_sock *tipc_sk_lookup(struct net *net, u32 portid);
static int tipc_sk_insert(struct tipc_sock *tsk);
static void tipc_sk_remove(struct tipc_sock *tsk);
static int __tipc_sendstream(struct socket *sock, struct msghdr *m, size_t dsz);
static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dsz);


static const struct proto_ops packet_ops;

static const struct proto_ops stream_ops;

static const struct proto_ops msg_ops;

static struct proto tipc_proto;

static const struct rhashtable_params tsk_rht_params;


static u32 tsk_own_node(struct tipc_sock *tsk) { return msg_prevnode(&tsk->phdr); }

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Jon Paul Maloy20100.00%1100.00%
Total20100.00%1100.00%


static u32 tsk_peer_node(struct tipc_sock *tsk) { return msg_destnode(&tsk->phdr); }

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Jon Paul Maloy20100.00%2100.00%
Total20100.00%2100.00%


static u32 tsk_peer_port(struct tipc_sock *tsk) { return msg_destport(&tsk->phdr); }

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Jon Paul Maloy20100.00%2100.00%
Total20100.00%2100.00%


static bool tsk_unreliable(struct tipc_sock *tsk) { return msg_src_droppable(&tsk->phdr) != 0; }

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Jon Paul Maloy22100.00%2100.00%
Total22100.00%2100.00%


static void tsk_set_unreliable(struct tipc_sock *tsk, bool unreliable) { msg_set_src_droppable(&tsk->phdr, unreliable ? 1 : 0); }

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Jon Paul Maloy28100.00%2100.00%
Total28100.00%2100.00%


static bool tsk_unreturnable(struct tipc_sock *tsk) { return msg_dest_droppable(&tsk->phdr) != 0; }

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Jon Paul Maloy22100.00%2100.00%
Total22100.00%2100.00%


static void tsk_set_unreturnable(struct tipc_sock *tsk, bool unreturnable) { msg_set_dest_droppable(&tsk->phdr, unreturnable ? 1 : 0); }

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PersonTokensPropCommitsCommitProp
Jon Paul Maloy28100.00%2100.00%
Total28100.00%2100.00%


static int tsk_importance(struct tipc_sock *tsk) { return msg_importance(&tsk->phdr); }

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Jon Paul Maloy20100.00%2100.00%
Total20100.00%2100.00%


static int tsk_set_importance(struct tipc_sock *tsk, int imp) { if (imp > TIPC_CRITICAL_IMPORTANCE) return -EINVAL; msg_set_importance(&tsk->phdr, (u32)imp); return 0; }

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Jon Paul Maloy40100.00%2100.00%
Total40100.00%2100.00%


static struct tipc_sock *tipc_sk(const struct sock *sk) { return container_of(sk, struct tipc_sock, sk); }

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Jon Paul Maloy25100.00%1100.00%
Total25100.00%1100.00%


static bool tsk_conn_cong(struct tipc_sock *tsk) { return tsk->snt_unacked > tsk->snd_win; }

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Jon Paul Maloy20100.00%3100.00%
Total20100.00%3100.00%

/* tsk_blocks(): translate a buffer size in bytes to number of * advertisable blocks, taking into account the ratio truesize(len)/len * We can trust that this ratio is always < 4 for len >= FLOWCTL_BLK_SZ */
static u16 tsk_adv_blocks(int len) { return len / FLOWCTL_BLK_SZ / 4; }

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Jon Paul Maloy16100.00%1100.00%
Total16100.00%1100.00%

/* tsk_inc(): increment counter for sent or received data * - If block based flow control is not supported by peer we * fall back to message based ditto, incrementing the counter */
static u16 tsk_inc(struct tipc_sock *tsk, int msglen) { if (likely(tsk->peer_caps & TIPC_BLOCK_FLOWCTL)) return ((msglen / FLOWCTL_BLK_SZ) + 1); return 1; }

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Jon Paul Maloy39100.00%2100.00%
Total39100.00%2100.00%

/** * tsk_advance_rx_queue - discard first buffer in socket receive queue * * Caller must hold socket lock */
static void tsk_advance_rx_queue(struct sock *sk) { kfree_skb(__skb_dequeue(&sk->sk_receive_queue)); }

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Allan Stephens1150.00%250.00%
Per Liden1045.45%125.00%
Jon Paul Maloy14.55%125.00%
Total22100.00%4100.00%

/* tipc_sk_respond() : send response message back to sender */
static void tipc_sk_respond(struct sock *sk, struct sk_buff *skb, int err) { u32 selector; u32 dnode; u32 onode = tipc_own_addr(sock_net(sk)); if (!tipc_msg_reverse(onode, &skb, err)) return; dnode = msg_destnode(buf_msg(skb)); selector = msg_origport(buf_msg(skb)); tipc_node_xmit_skb(sock_net(sk), skb, dnode, selector); }

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PersonTokensPropCommitsCommitProp
Jon Paul Maloy5869.05%550.00%
Ying Xue1011.90%330.00%
Per Liden89.52%110.00%
Allan Stephens89.52%110.00%
Total84100.00%10100.00%

/** * tsk_rej_rx_queue - reject all buffers in socket receive queue * * Caller must hold socket lock */
static void tsk_rej_rx_queue(struct sock *sk) { struct sk_buff *skb; while ((skb = __skb_dequeue(&sk->sk_receive_queue))) tipc_sk_respond(sk, skb, TIPC_ERR_NO_PORT); }

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Jon Paul Maloy39100.00%2100.00%
Total39100.00%2100.00%


static bool tipc_sk_connected(struct sock *sk) { return sk->sk_state == TIPC_ESTABLISHED; }

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Parthasarathy Bhuvaragan18100.00%2100.00%
Total18100.00%2100.00%

/* tipc_sk_type_connectionless - check if the socket is datagram socket * @sk: socket * * Returns true if connection less, false otherwise */
static bool tipc_sk_type_connectionless(struct sock *sk) { return sk->sk_type == SOCK_RDM || sk->sk_type == SOCK_DGRAM; }

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Parthasarathy Bhuvaragan24100.00%1100.00%
Total24100.00%1100.00%

/* tsk_peer_msg - verify if message was sent by connected port's peer * * Handles cases where the node's network address has changed from * the default of <0.0.0> to its configured setting. */
static bool tsk_peer_msg(struct tipc_sock *tsk, struct tipc_msg *msg) { struct sock *sk = &tsk->sk; struct tipc_net *tn = net_generic(sock_net(sk), tipc_net_id); u32 peer_port = tsk_peer_port(tsk); u32 orig_node; u32 peer_node; if (unlikely(!tipc_sk_connected(sk))) return false; if (unlikely(msg_origport(msg) != peer_port)) return false; orig_node = msg_orignode(msg); peer_node = tsk_peer_node(tsk); if (likely(orig_node == peer_node)) return true; if (!orig_node && (peer_node == tn->own_addr)) return true; if (!peer_node && (orig_node == tn->own_addr)) return true; return false; }

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Jon Paul Maloy11075.86%250.00%
Ying Xue2114.48%125.00%
Parthasarathy Bhuvaragan149.66%125.00%
Total145100.00%4100.00%

/* tipc_set_sk_state - set the sk_state of the socket * @sk: socket * * Caller must hold socket lock * * Returns 0 on success, errno otherwise */
static int tipc_set_sk_state(struct sock *sk, int state) { int oldsk_state = sk->sk_state; int res = -EINVAL; switch (state) { case TIPC_OPEN: res = 0; break; case TIPC_LISTEN: case TIPC_CONNECTING: if (oldsk_state == TIPC_OPEN) res = 0; break; case TIPC_ESTABLISHED: if (oldsk_state == TIPC_CONNECTING || oldsk_state == TIPC_OPEN) res = 0; break; case TIPC_DISCONNECTING: if (oldsk_state == TIPC_CONNECTING || oldsk_state == TIPC_ESTABLISHED) res = 0; break; } if (!res) sk->sk_state = state; return res; }

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Parthasarathy Bhuvaragan108100.00%5100.00%
Total108100.00%5100.00%


static int tipc_sk_sock_err(struct socket *sock, long *timeout) { struct sock *sk = sock->sk; int err = sock_error(sk); int typ = sock->type; if (err) return err; if (typ == SOCK_STREAM || typ == SOCK_SEQPACKET) { if (sk->sk_state == TIPC_DISCONNECTING) return -EPIPE; else if (!tipc_sk_connected(sk)) return -ENOTCONN; } if (!*timeout) return -EAGAIN; if (signal_pending(current)) return sock_intr_errno(*timeout); return 0; }

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Jon Paul Maloy110100.00%1100.00%
Total110100.00%1100.00%

#define tipc_wait_for_cond(sock_, timeout_, condition_) \ ({ \ int rc_ = 0; \ int done_ = 0; \ \ while (!(condition_) && !done_) { \ struct sock *sk_ = sock->sk; \ DEFINE_WAIT_FUNC(wait_, woken_wake_function); \ \ rc_ = tipc_sk_sock_err(sock_, timeout_); \ if (rc_) \ break; \ prepare_to_wait(sk_sleep(sk_), &wait_, \ TASK_INTERRUPTIBLE); \ done_ = sk_wait_event(sk_, timeout_, \ (condition_), &wait_); \ remove_wait_queue(sk_sleep(sk_), &wait_); \ } \ rc_; \ }) /** * tipc_sk_create - create a TIPC socket * @net: network namespace (must be default network) * @sock: pre-allocated socket structure * @protocol: protocol indicator (must be 0) * @kern: caused by kernel or by userspace? * * This routine creates additional data structures used by the TIPC socket, * initializes them, and links them together. * * Returns 0 on success, errno otherwise */
static int tipc_sk_create(struct net *net, struct socket *sock, int protocol, int kern) { struct tipc_net *tn; const struct proto_ops *ops; struct sock *sk; struct tipc_sock *tsk; struct tipc_msg *msg; /* Validate arguments */ if (unlikely(protocol != 0)) return -EPROTONOSUPPORT; switch (sock->type) { case SOCK_STREAM: ops = &stream_ops; break; case SOCK_SEQPACKET: ops = &packet_ops; break; case SOCK_DGRAM: case SOCK_RDM: ops = &msg_ops; break; default: return -EPROTOTYPE; } /* Allocate socket's protocol area */ sk = sk_alloc(net, AF_TIPC, GFP_KERNEL, &tipc_proto, kern); if (sk == NULL) return -ENOMEM; tsk = tipc_sk(sk); tsk->max_pkt = MAX_PKT_DEFAULT; INIT_LIST_HEAD(&tsk->publications); INIT_LIST_HEAD(&tsk->cong_links); msg = &tsk->phdr; tn = net_generic(sock_net(sk), tipc_net_id); /* Finish initializing socket data structures */ sock->ops = ops; sock_init_data(sock, sk); tipc_set_sk_state(sk, TIPC_OPEN); if (tipc_sk_insert(tsk)) { pr_warn("Socket create failed; port number exhausted\n"); return -EINVAL; } /* Ensure tsk is visible before we read own_addr. */ smp_mb(); tipc_msg_init(tn->own_addr, msg, TIPC_LOW_IMPORTANCE, TIPC_NAMED_MSG, NAMED_H_SIZE, 0); msg_set_origport(msg, tsk->portid); setup_timer(&sk->sk_timer, tipc_sk_timeout, (unsigned long)tsk); sk->sk_shutdown = 0; sk->sk_backlog_rcv = tipc_backlog_rcv; sk->sk_rcvbuf = sysctl_tipc_rmem[1]; sk->sk_data_ready = tipc_data_ready; sk->sk_write_space = tipc_write_space; sk->sk_destruct = tipc_sock_destruct; tsk->conn_timeout = CONN_TIMEOUT_DEFAULT; atomic_set(&tsk->dupl_rcvcnt, 0); /* Start out with safe limits until we receive an advertised window */ tsk->snd_win = tsk_adv_blocks(RCVBUF_MIN); tsk->rcv_win = tsk->snd_win; if (tipc_sk_type_connectionless(sk)) { tsk_set_unreturnable(tsk, true); if (sock->type == SOCK_DGRAM) tsk_set_unreliable(tsk, true); } return 0; }

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PersonTokensPropCommitsCommitProp
Per Liden10327.69%13.12%
Jon Paul Maloy10127.15%1031.25%
Ying Xue6016.13%825.00%
Allan Stephens5514.78%412.50%
Herbert Xu215.65%13.12%
Parthasarathy Bhuvaragan174.57%39.38%
Eric W. Biedermann92.42%26.25%
Eric Paris30.81%13.12%
Erik Hugne20.54%13.12%
Masanari Iida10.27%13.12%
Total372100.00%32100.00%


static void tipc_sk_callback(struct rcu_head *head) { struct tipc_sock *tsk = container_of(head, struct tipc_sock, rcu); sock_put(&tsk->sk); }

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Ying Xue34100.00%1100.00%
Total34100.00%1100.00%

/* Caller should hold socket lock for the socket. */
static void __tipc_shutdown(struct socket *sock, int error) { struct sock *sk = sock->sk; struct tipc_sock *tsk = tipc_sk(sk); struct net *net = sock_net(sk); long timeout = CONN_TIMEOUT_DEFAULT; u32 dnode = tsk_peer_node(tsk); struct sk_buff *skb; /* Avoid that hi-prio shutdown msgs bypass msgs in link wakeup queue */ tipc_wait_for_cond(sock, &timeout, (!tsk->cong_link_cnt && !tsk_conn_cong(tsk))); /* Reject all unreceived messages, except on an active connection * (which disconnects locally & sends a 'FIN+' to peer). */ while ((skb = __skb_dequeue(&sk->sk_receive_queue)) != NULL) { if (TIPC_SKB_CB(skb)->bytes_read) { kfree_skb(skb); continue; } if (!tipc_sk_type_connectionless(sk) && sk->sk_state != TIPC_DISCONNECTING) { tipc_set_sk_state(sk, TIPC_DISCONNECTING); tipc_node_remove_conn(net, dnode, tsk->portid); } tipc_sk_respond(sk, skb, error); } if (tipc_sk_type_connectionless(sk)) return; if (sk->sk_state != TIPC_DISCONNECTING) { skb = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, TIPC_CONN_MSG, SHORT_H_SIZE, 0, dnode, tsk_own_node(tsk), tsk_peer_port(tsk), tsk->portid, error); if (skb) tipc_node_xmit_skb(net, skb, dnode, tsk->portid); tipc_node_remove_conn(net, dnode, tsk->portid); tipc_set_sk_state(sk, TIPC_DISCONNECTING); } }

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PersonTokensPropCommitsCommitProp
Jon Paul Maloy10743.50%1045.45%
Parthasarathy Bhuvaragan6024.39%313.64%
Per Liden4116.67%14.55%
Ying Xue187.32%418.18%
Allan Stephens145.69%29.09%
Sasha Levin52.03%14.55%
Sam Ravnborg10.41%14.55%
Total246100.00%22100.00%

/** * tipc_release - destroy a TIPC socket * @sock: socket to destroy * * This routine cleans up any messages that are still queued on the socket. * For DGRAM and RDM socket types, all queued messages are rejected. * For SEQPACKET and STREAM socket types, the first message is rejected * and any others are discarded. (If the first message on a STREAM socket * is partially-read, it is discarded and the next one is rejected instead.) * * NOTE: Rejected messages are not necessarily returned to the sender! They * are returned or discarded according to the "destination droppable" setting * specified for the message by the sender. * * Returns 0 on success, errno otherwise */
static int tipc_release(struct socket *sock) { struct sock *sk = sock->sk; struct tipc_sock *tsk; /* * Exit if socket isn't fully initialized (occurs when a failed accept() * releases a pre-allocated child socket that was never used) */ if (sk == NULL) return 0; tsk = tipc_sk(sk); lock_sock(sk); __tipc_shutdown(sock, TIPC_ERR_NO_PORT); sk->sk_shutdown = SHUTDOWN_MASK; tipc_sk_withdraw(tsk, 0, NULL); sk_stop_timer(sk, &sk->sk_timer); tipc_sk_remove(tsk); /* Reject any messages that accumulated in backlog queue */ release_sock(sk); u32_list_purge(&tsk->cong_links); tsk->cong_link_cnt = 0; call_rcu(&tsk->rcu, tipc_sk_callback); sock->sk = NULL; return 0; }

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Parthasarathy Bhuvaragan8065.04%116.67%
Per Liden1713.82%116.67%
Jon Paul Maloy1411.38%116.67%
Ying Xue75.69%116.67%
Allan Stephens43.25%116.67%
Geert Uytterhoeven10.81%116.67%
Total123100.00%6100.00%

/** * tipc_bind - associate or disassocate TIPC name(s) with a socket * @sock: socket structure * @uaddr: socket address describing name(s) and desired operation * @uaddr_len: size of socket address data structure * * Name and name sequence binding is indicated using a positive scope value; * a negative scope value unbinds the specified name. Specifying no name * (i.e. a socket address length of 0) unbinds all names from the socket. * * Returns 0 on success, errno otherwise * * NOTE: This routine doesn't need to take the socket lock since it doesn't * access any non-constant socket information. */
static int tipc_bind(struct socket *sock, struct sockaddr *uaddr, int uaddr_len) { struct sock *sk = sock->sk; struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; struct tipc_sock *tsk = tipc_sk(sk); int res = -EINVAL; lock_sock(sk); if (unlikely(!uaddr_len)) { res = tipc_sk_withdraw(tsk, 0, NULL); goto exit; } if (uaddr_len < sizeof(struct sockaddr_tipc)) { res = -EINVAL; goto exit; } if (addr->family != AF_TIPC) { res = -EAFNOSUPPORT; goto exit; } if (addr->addrtype == TIPC_ADDR_NAME) addr->addr.nameseq.upper = addr->addr.nameseq.lower; else if (addr->addrtype != TIPC_ADDR_NAMESEQ) { res = -EAFNOSUPPORT; goto exit; } if ((addr->addr.nameseq.type < TIPC_RESERVED_TYPES) && (addr->addr.nameseq.type != TIPC_TOP_SRV) && (addr->addr.nameseq.type != TIPC_CFG_SRV)) { res = -EACCES; goto exit; } res = (addr->scope > 0) ? tipc_sk_publish(tsk, addr->scope, &addr->addr.nameseq) : tipc_sk_withdraw(tsk, -addr->scope, &addr->addr.nameseq); exit: release_sock(sk); return res; }

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Per Liden13550.56%110.00%
Ying Xue10137.83%440.00%
Allan Stephens217.87%220.00%
Jon Paul Maloy93.37%220.00%
Sam Ravnborg10.37%110.00%
Total267100.00%10100.00%

/** * tipc_getname - get port ID of socket or peer socket * @sock: socket structure * @uaddr: area for returned socket address * @uaddr_len: area for returned length of socket address * @peer: 0 = own ID, 1 = current peer ID, 2 = current/former peer ID * * Returns 0 on success, errno otherwise * * NOTE: This routine doesn't need to take the socket lock since it only * accesses socket information that is unchanging (or which changes in * a completely predictable manner). */
static int tipc_getname(struct socket *sock, struct sockaddr *uaddr, int *uaddr_len, int peer) { struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; struct sock *sk = sock->sk; struct tipc_sock *tsk = tipc_sk(sk); struct tipc_net *tn = net_generic(sock_net(sock->sk), tipc_net_id); memset(addr, 0, sizeof(*addr)); if (peer) { if ((!tipc_sk_connected(sk)) && ((peer != 2) || (sk->sk_state != TIPC_DISCONNECTING))) return -ENOTCONN; addr->addr.id.ref = tsk_peer_port(tsk); addr->addr.id.node = tsk_peer_node(tsk); } else { addr->addr.id.ref = tsk->portid; addr->addr.id.node = tn->own_addr; } *uaddr_len = sizeof(*addr); addr->addrtype = TIPC_ADDR_ID; addr->family = AF_TIPC; addr->scope = 0; addr->addr.name.domain = 0; return 0; }

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Per Liden7736.15%17.69%
Allan Stephens7233.80%323.08%
Ying Xue2210.33%323.08%
Parthasarathy Bhuvaragan177.98%215.38%
Vasiliy Kulikov136.10%17.69%
Jon Paul Maloy125.63%323.08%
Total213100.00%13100.00%

/** * tipc_poll - read and possibly block on pollmask * @file: file structure associated with the socket * @sock: socket for which to calculate the poll bits * @wait: ??? * * Returns pollmask value * * COMMENTARY: * It appears that the usual socket locking mechanisms are not useful here * since the pollmask info is potentially out-of-date the moment this routine * exits. TCP and other protocols seem to rely on higher level poll routines * to handle any preventable race conditions, so TIPC will do the same ... * * IMPORTANT: The fact that a read or write operation is indicated does NOT * imply that the operation will succeed, merely that it should be performed * and will not block. */
static unsigned int tipc_poll(struct file *file, struct socket *sock, poll_table *wait) { struct sock *sk = sock->sk; struct tipc_sock *tsk = tipc_sk(sk); u32 mask = 0; sock_poll_wait(file, sk_sleep(sk), wait); if (sk->sk_shutdown & RCV_SHUTDOWN) mask |= POLLRDHUP | POLLIN | POLLRDNORM; if (sk->sk_shutdown == SHUTDOWN_MASK) mask |= POLLHUP; switch (sk->sk_state) { case TIPC_ESTABLISHED: if (!tsk->cong_link_cnt && !tsk_conn_cong(tsk)) mask |= POLLOUT; /* fall thru' */ case TIPC_LISTEN: case TIPC_CONNECTING: if (!skb_queue_empty(&sk->sk_receive_queue)) mask |= (POLLIN | POLLRDNORM); break; case TIPC_OPEN: if (!tsk->cong_link_cnt) mask |= POLLOUT; if (tipc_sk_type_connectionless(sk) && (!skb_queue_empty(&sk->sk_receive_queue))) mask |= (POLLIN | POLLRDNORM); break; case TIPC_DISCONNECTING: mask = (POLLIN | POLLRDNORM | POLLHUP); break; } return mask; }

Contributors

PersonTokensPropCommitsCommitProp
Parthasarathy Bhuvaragan10352.02%535.71%
Allan Stephens4522.73%214.29%
Per Liden3115.66%17.14%
Jon Paul Maloy136.57%214.29%
Eric Dumazet31.52%17.14%
Ying Xue21.01%214.29%
Erik Hugne10.51%17.14%
Total198100.00%14100.00%

/** * tipc_sendmcast - send multicast message * @sock: socket structure * @seq: destination address * @msg: message to send * @dlen: length of data to send * @timeout: timeout to wait for wakeup * * Called from function tipc_sendmsg(), which has done all sanity checks * Returns the number of bytes sent on success, or errno */
static int tipc_sendmcast(struct socket *sock, struct tipc_name_seq *seq, struct msghdr *msg, size_t dlen, long timeout) { struct sock *sk = sock->sk; struct tipc_sock *tsk = tipc_sk(sk); struct tipc_msg *hdr = &tsk->phdr; struct net *net = sock_net(sk); int mtu = tipc_bcast_get_mtu(net); struct tipc_mc_method *method = &tsk->mc_method; u32 domain = addr_domain(net, TIPC_CLUSTER_SCOPE); struct sk_buff_head pkts; struct tipc_nlist dsts; int rc; /* Block or return if any destination link is congested */ rc = tipc_wait_for_cond(sock, &timeout, !tsk->cong_link_cnt); if (unlikely(rc)) return rc; /* Lookup destination nodes */ tipc_nlist_init(&dsts, tipc_own_addr(net)); tipc_nametbl_lookup_dst_nodes(net, seq->type, seq->lower, seq->upper, domain, &dsts); if (!dsts.local && !dsts.remote) return -EHOSTUNREACH; /* Build message header */ msg_set_type(hdr, TIPC_MCAST_MSG); msg_set_hdr_sz(hdr, MCAST_H_SIZE); msg_set_lookup_scope(hdr, TIPC_CLUSTER_SCOPE); msg_set_destport(hdr, 0); msg_set_destnode(hdr, 0); msg_set_nametype(hdr, seq->type); msg_set_namelower(hdr, seq->lower); msg_set_nameupper(hdr, seq->upper); /* Build message as chain of buffers */ skb_queue_head_init(&pkts); rc = tipc_msg_build(hdr, msg, 0, dlen, mtu, &pkts); /* Send message if build was successful */ if (unlikely(rc == dlen)) rc = tipc_mcast_xmit(net, &pkts, method, &dsts, &tsk->cong_link_cnt); tipc_nlist_purge(&dsts); return rc ? rc : dlen; }

Contributors

PersonTokensPropCommitsCommitProp
Jon Paul Maloy28691.67%964.29%
Ying Xue123.85%214.29%
Parthasarathy Bhuvaragan113.53%214.29%
Al Viro30.96%17.14%
Total312100.00%14100.00%

/** * tipc_sk_mcast_rcv - Deliver multicast messages to all destination sockets * @arrvq: queue with arriving messages, to be cloned after destination lookup * @inputq: queue with cloned messages, delivered to socket after dest lookup * * Multi-threaded: parallel calls with reference to same queues may occur */
void tipc_sk_mcast_rcv(struct net *net, struct sk_buff_head *arrvq, struct sk_buff_head *inputq) { struct tipc_msg *msg; struct list_head dports; u32 portid; u32 scope = TIPC_CLUSTER_SCOPE; struct sk_buff_head tmpq; uint hsz; struct sk_buff *skb, *_skb; __skb_queue_head_init(&tmpq); INIT_LIST_HEAD(&dports); skb = tipc_skb_peek(arrvq, &inputq->lock); for (; skb; skb = tipc_skb_peek(arrvq, &inputq->lock)) { msg = buf_msg(skb); hsz = skb_headroom(skb) + msg_hdr_sz(msg); if (in_own_node(net, msg_orignode(msg))) scope = TIPC_NODE_SCOPE; /* Create destination port list and message clones: */ tipc_nametbl_mc_translate(net, msg_nametype(msg), msg_namelower(msg), msg_nameupper(msg), scope, &dports); portid = u32_pop(&dports); for (; portid; portid = u32_pop(&dports)) { _skb = __pskb_copy(skb, hsz, GFP_ATOMIC); if (_skb) { msg_set_destport(buf_msg(_skb), portid); __skb_queue_tail(&tmpq, _skb); continue; } pr_warn("Failed to clone mcast rcv buffer\n"); } /* Append to inputq if not already done by other thread */ spin_lock_bh(&inputq->lock); if (skb_peek(arrvq) == skb) { skb_queue_splice_tail_init(&tmpq, inputq); kfree_skb(__skb_dequeue(arrvq)); } spin_unlock_bh(&inputq->lock); __skb_queue_purge(&tmpq); kfree_skb(skb); } tipc_sk_rcv(net, inputq); }

Contributors

PersonTokensPropCommitsCommitProp
Jon Paul Maloy27396.81%562.50%
Ying Xue93.19%337.50%
Total282100.00%8100.00%

/** * tipc_sk_proto_rcv - receive a connection mng protocol message * @tsk: receiving socket * @skb: pointer to message buffer. */
static void tipc_sk_proto_rcv(struct tipc_sock *tsk, struct sk_buff *skb, struct sk_buff_head *xmitq) { struct sock *sk = &tsk->sk; u32 onode = tsk_own_node(tsk); struct tipc_msg *hdr = buf_msg(skb); int mtyp = msg_type(hdr); bool conn_cong; /* Ignore if connection cannot be validated: */ if (!tsk_peer_msg(tsk, hdr)) goto exit; if (unlikely(msg_errcode(hdr))) { tipc_set_sk_state(sk, TIPC_DISCONNECTING); tipc_node_remove_conn(sock_net(sk), tsk_peer_node(tsk), tsk_peer_port(tsk)); sk->sk_state_change(sk); goto exit; } tsk->probe_unacked = false; if (mtyp == CONN_PROBE) { msg_set_type(hdr, CONN_PROBE_REPLY); if (tipc_msg_reverse(onode, &skb, TIPC_OK)) __skb_queue_tail(xmitq, skb); return; } else if (mtyp == CONN_ACK) { conn_cong = tsk_conn_cong(tsk); tsk->snt_unacked -= msg_conn_ack(hdr); if (tsk->peer_caps & TIPC_BLOCK_FLOWCTL) tsk->snd_win = msg_adv_win(hdr); if (conn_cong) sk->sk_write_space(sk); } else if (mtyp != CONN_PROBE_REPLY) { pr_warn("Received unknown CONN_PROTO msg\n"); } exit: kfree_skb(skb); }

Contributors

PersonTokensPropCommitsCommitProp
Jon Paul Maloy18678.81%1076.92%
Parthasarathy Bhuvaragan4920.76%215.38%
Wei Yongjun10.42%17.69%
Total236100.00%13100.00%

/** * tipc_sendmsg - send message in connectionless manner * @sock: socket structure * @m: message to send * @dsz: amount of user data to be sent * * Message must have an destination specified explicitly. * Used for SOCK_RDM and SOCK_DGRAM messages, * and for 'SYN' messages on SOCK_SEQPACKET and SOCK_STREAM connections. * (Note: 'SYN+' is prohibited on SOCK_STREAM.) * * Returns the number of bytes sent on success, or errno otherwise */
static int tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dsz) { struct sock *sk = sock->sk; int ret; lock_sock(sk); ret = __tipc_sendmsg(sock, m, dsz); release_sock(sk); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Ying Xue3869.09%250.00%
Per Liden1629.09%125.00%
Jon Paul Maloy11.82%125.00%
Total55100.00%4100.00%


static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dlen) { struct sock *sk = sock->sk; struct net *net = sock_net(sk); struct tipc_sock *tsk = tipc_sk(sk); DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); long timeout = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); struct list_head *clinks = &tsk->cong_links; bool syn = !tipc_sk_type_connectionless(sk); struct tipc_msg *hdr = &tsk->phdr; struct tipc_name_seq *seq; struct sk_buff_head pkts; u32 type, inst, domain; u32 dnode, dport; int mtu, rc; if (unlikely(dlen > TIPC_MAX_USER_MSG_SIZE)) return -EMSGSIZE; if (unlikely(!dest)) { dest = &tsk->peer; if (!syn || dest->family != AF_TIPC) return -EDESTADDRREQ; } if (unlikely(m->msg_namelen < sizeof(*dest))) return -EINVAL; if (unlikely(dest->family != AF_TIPC)) return -EINVAL; if (unlikely(syn)) { if (sk->sk_state == TIPC_LISTEN) return -EPIPE; if (sk->sk_state != TIPC_OPEN) return -EISCONN; if (tsk->published) return -EOPNOTSUPP; if (dest->addrtype == TIPC_ADDR_NAME) { tsk->conn_type = dest->addr.name.name.type; tsk->conn_instance = dest->addr.name.name.instance; } } seq = &dest->addr.nameseq; if (dest->addrtype == TIPC_ADDR_MCAST) return tipc_sendmcast(sock, seq, m, dlen, timeout); if (dest->addrtype == TIPC_ADDR_NAME) { type = dest->addr.name.name.type; inst = dest->addr.name.name.instance; domain = dest->addr.name.domain; dnode = domain; msg_set_type(hdr, TIPC_NAMED_MSG); msg_set_hdr_sz(hdr, NAMED_H_SIZE); msg_set_nametype(hdr, type); msg_set_nameinst(hdr, inst); msg_set_lookup_scope(hdr, tipc_addr_scope(domain)); dport = tipc_nametbl_translate(net, type, inst, &dnode); msg_set_destnode(hdr, dnode); msg_set_destport(hdr, dport); if (unlikely(!dport && !dnode)) return -EHOSTUNREACH; } else if (dest->addrtype == TIPC_ADDR_ID) { dnode = dest->addr.id.node; msg_set_type(hdr, TIPC_DIRECT_MSG); msg_set_lookup_scope(hdr, 0); msg_set_destnode(hdr, dnode); msg_set_destport(hdr, dest->addr.id.ref); msg_set_hdr_sz(hdr, BASIC_H_SIZE); } /* Block or return if destination link is congested */ rc = tipc_wait_for_cond(sock, &timeout, !u32_find(clinks, dnode)); if (unlikely(rc)) return rc; skb_queue_head_init(&pkts); mtu = tipc_node_get_mtu(net, dnode, tsk->portid); rc = tipc_msg_build(hdr, m, 0, dlen, mtu, &pkts); if (unlikely(rc != dlen)) return rc; rc = tipc_node_xmit(net, &pkts, dnode, tsk->portid); if (unlikely(rc == -ELINKCONG)) { u32_push(clinks, dnode); tsk->cong_link_cnt++; rc = 0; } if (unlikely(syn && !rc)) tipc_set_sk_state(sk, TIPC_CONNECTING); return rc ? rc : dlen; }

Contributors

PersonTokensPropCommitsCommitProp
Jon Paul Maloy35153.34%825.00%
Per Liden13620.67%13.12%
Allan Stephens629.42%618.75%
Ying Xue477.14%618.75%
Erik Hugne345.17%26.25%
Parthasarathy Bhuvaragan233.50%618.75%
Al Viro50.76%39.38%
Total658100.00%32100.00%

/** * tipc_sendstream - send stream-oriented data * @sock: socket structure * @m: data to send * @dsz: total length of data to be transmitted * * Used for SOCK_STREAM data. * * Returns the number of bytes sent on success (or partial success), * or errno if no data sent */
static int tipc_sendstream(struct socket *sock, struct msghdr *m, size_t dsz) { struct sock *sk = sock->sk; int ret; lock_sock(sk); ret = __tipc_sendstream(sock, m, dsz); release_sock(sk); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Ying Xue2749.09%120.00%
Per Liden2240.00%120.00%
Allan Stephens35.45%120.00%
Jon Paul Maloy35.45%240.00%
Total55100.00%5100.00%


static int __tipc_sendstream(struct socket *sock, struct msghdr *m, size_t dlen) { struct sock *sk = sock->sk; DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); long timeout = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); struct tipc_sock *tsk = tipc_sk(sk); struct tipc_msg *hdr = &tsk->phdr; struct net *net = sock_net(sk); struct sk_buff_head pkts; u32 dnode = tsk_peer_node(tsk); int send, sent = 0; int rc = 0; skb_queue_head_init(&pkts); if (unlikely(dlen > INT_MAX)) return -EMSGSIZE; /* Handle implicit connection setup */ if (unlikely(dest)) { rc = __tipc_sendmsg(sock, m, dlen); if (dlen && (dlen == rc)) tsk->snt_unacked = tsk_inc(tsk, dlen + msg_hdr_sz(hdr)); return rc; } do { rc = tipc_wait_for_cond(sock, &timeout, (!tsk->cong_link_cnt && !tsk_conn_cong(tsk) && tipc_sk_connected(sk))); if (unlikely(rc)) break; send = min_t(size_t, dlen - sent, TIPC_MAX_USER_MSG_SIZE); rc = tipc_msg_build(hdr, m, sent, send, tsk->max_pkt, &pkts); if (unlikely(rc != send)) break; rc = tipc_node_xmit(net, &pkts, dnode, tsk->portid); if (unlikely(rc == -ELINKCONG)) { tsk->cong_link_cnt = 1; rc = 0; } if (likely(!rc)) { tsk->snt_unacked += tsk_inc(tsk, send + MIN_H_SIZE); sent += send; } } while (sent < dlen && !rc); return sent ? sent : rc; }

Contributors

PersonTokensPropCommitsCommitProp
Jon Paul Maloy25875.44%940.91%
Ying Xue4011.70%418.18%
Allan Stephens154.39%313.64%
Parthasarathy Bhuvaragan133.80%313.64%
Per Liden113.22%14.55%
Erik Hugne30.88%14.55%
Steffen Hurrle20.58%14.55%
Total342100.00%22100.00%

/** * tipc_send_packet - send a connection-oriented message * @sock: socket structure * @m: message to send * @dsz: length of data to be transmitted * * Used for SOCK_SEQPACKET messages. * * Returns the number of bytes sent on success, or errno otherwise */
static int tipc_send_packet(struct socket *sock, struct msghdr *m, size_t dsz) { if (dsz > TIPC_MAX_USER_MSG_SIZE) return -EMSGSIZE; return tipc_sendstream(sock, m, dsz); }

Contributors

PersonTokensPropCommitsCommitProp
Per Liden2256.41%116.67%
Jon Paul Maloy1025.64%233.33%
Allan Stephens717.95%350.00%
Total39100.00%6100.00%

/* tipc_sk_finish_conn - complete the setup of a connection */
static void tipc_sk_finish_conn(struct tipc_sock *tsk, u32 peer_port, u32 peer_node) { struct sock *sk = &tsk->sk; struct net *net = sock_net(sk); struct tipc_msg *msg = &tsk->phdr; msg_set_destnode(msg, peer_node); msg_set_destport(msg, peer_port); msg_set_type(msg, TIPC_CONN_MSG); msg_set_lookup_scope(msg, 0); msg_set_hdr_sz(msg, SHORT_H_SIZE); sk_reset_timer(sk, &sk->sk_timer, jiffies + CONN_PROBING_INTERVAL); tipc_set_sk_state(sk, TIPC_ESTABLISHED); tipc_node_add_conn(net, peer_node, tsk->portid, peer_port); tsk->max_pkt = tipc_node_get_mtu(net, peer_node, tsk->portid); tsk->peer_caps = tipc_node_get_capabilities(net, peer_node); if (tsk->peer_caps & TIPC_BLOCK_FLOWCTL) return; /* Fall back to message based flow control */ tsk->rcv_win = FLOWCTL_MSG_WIN; tsk->snd_win = FLOWCTL_MSG_WIN; }

Contributors

PersonTokensPropCommitsCommitProp
Jon Paul Maloy8551.83%640.00%
Ying Xue3823.17%533.33%
Per Liden3018.29%16.67%
Parthasarathy Bhuvaragan84.88%213.33%
Allan Stephens31.83%16.67%
Total164100.00%15100.00%

/** * set_orig_addr - capture sender's address for received message * @m: descriptor for message info * @msg: received message header * * Note: Address is not captured if not requested by receiver. */
static void set_orig_addr(struct msghdr *m, struct tipc_msg *msg) { DECLARE_SOCKADDR(struct sockaddr_tipc *, addr, m->msg_name); if (addr) { addr->family = AF_TIPC; addr->addrtype = TIPC_ADDR_ID; memset(&addr->addr, 0, sizeof(addr->addr)); addr->addr.id.ref = msg_origport(msg); addr->addr.id.node = msg_orignode(msg); addr->addr.name.domain = 0; /* could leave uninitialized */ addr->scope = 0; /* could leave uninitialized */ m->msg_namelen = sizeof(struct sockaddr_tipc); } }

Contributors

PersonTokensPropCommitsCommitProp
Per Liden9479.66%133.33%
Mathias Krause1714.41%133.33%
Steffen Hurrle75.93%133.33%
Total118100.00%3100.00%

/** * tipc_sk_anc_data_recv - optionally capture ancillary data for received message * @m: descriptor for message info * @msg: received message header * @tsk: TIPC port associated with message * * Note: Ancillary data is not captured if not requested by receiver. * * Returns 0 if successful, otherwise errno */
static int tipc_sk_anc_data_recv(struct msghdr *m, struct tipc_msg *msg, struct tipc_sock *tsk) { u32 anc_data[3]; u32 err; u32 dest_type; int has_name; int res; if (likely(m->msg_controllen == 0)) return 0; /* Optionally capture errored message object(s) */ err = msg ? msg_errcode(msg) : 0; if (unlikely(err)) { anc_data[0] = err; anc_data[1] = msg_data_sz(msg); res = put_cmsg(m, SOL_TIPC, TIPC_ERRINFO, 8, anc_data); if (res) return res; if (anc_data[1]) { res = put_cmsg(m, SOL_TIPC, TIPC_RETDATA, anc_data[1], msg_data(msg)); if (res) return res; } } /* Optionally capture message destination object */ dest_type = msg ? msg_type(msg) : TIPC_DIRECT_MSG; switch (dest_type) { case TIPC_NAMED_MSG: has_name = 1; anc_data[0] = msg_nametype(msg); anc_data[1] = msg_namelower(msg); anc_data[2] = msg_namelower(msg); break; case TIPC_MCAST_MSG: has_name = 1; anc_data[0] = msg_nametype(msg); anc_data[1] = msg_namelower(msg); anc_data[2] = msg_nameupper(msg); break; case TIPC_CONN_MSG: has_name = (tsk->conn_type != 0); anc_data[0] = tsk->conn_type; anc_data[1] = tsk->conn_instance; anc_data[2] = tsk->conn_instance; break; default: has_name = 0; } if (has_name) { res = put_cmsg(m, SOL_TIPC, TIPC_DESTNAME, 12, anc_data); if (res) return res; } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Per Liden27184.42%120.00%
Allan Stephens4313.40%360.00%
Jon Paul Maloy72.18%120.00%
Total321100.00%5100.00%


static void tipc_sk_send_ack(struct tipc_sock *tsk) { struct sock *sk = &tsk->sk; struct net *net = sock_net(sk); struct sk_buff *skb = NULL; struct tipc_msg *msg; u32 peer_port = tsk_peer_port(tsk); u32 dnode = tsk_peer_node(tsk); if (!tipc_sk_connected(sk)) return; skb = tipc_msg_create(CONN_MANAGER, CONN_ACK, INT_H_SIZE, 0, dnode, tsk_own_node(tsk), peer_port, tsk->portid, TIPC_OK); if (!skb) return; msg = buf_msg(skb); msg_set_conn_ack(msg, tsk->rcv_unacked); tsk->rcv_unacked = 0; /* Adjust to and advertize the correct window limit */ if (tsk->peer_caps & TIPC_BLOCK_FLOWCTL) { tsk->rcv_win = tsk_adv_blocks(tsk->sk.sk_rcvbuf); msg_set_adv_win(msg, tsk->rcv_win); } tipc_node_xmit_skb(net, skb, dnode, msg_link_selector(msg)); }

Contributors

PersonTokensPropCommitsCommitProp
Jon Paul Maloy13981.29%660.00%
Ying Xue1810.53%330.00%
Parthasarathy Bhuvaragan148.19%110.00%
Total171100.00%10100.00%


static int tipc_wait_for_rcvmsg(struct socket *sock, long *timeop) { struct sock *sk = sock->sk; DEFINE_WAIT(wait); long timeo = *timeop; int err = sock_error(sk); if (err) return err; for (;;) { prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { if (sk->sk_shutdown & RCV_SHUTDOWN) { err = -ENOTCONN; break; } release_sock(sk); timeo = schedule_timeout(timeo); lock_sock(sk); } err = 0; if (!skb_queue_empty(&sk->sk_receive_queue)) break; err = -EAGAIN; if (!timeo) break; err = sock_intr_errno(timeo); if (signal_pending(current)) break; err = sock_error(sk); if (err) break; } finish_wait(sk_sleep(sk), &wait); *timeop = timeo; return err; }

Contributors

PersonTokensPropCommitsCommitProp
Ying Xue13872.63%233.33%
Parthasarathy Bhuvaragan2814.74%233.33%
Arnaldo Carvalho de Melo136.84%116.67%
Erik Hugne115.79%116.67%
Total190100.00%6100.00%

/** * tipc_recvmsg - receive packet-oriented message * @m: descriptor for message info * @buf_len: total size of user buffer area * @flags: receive flags * * Used for SOCK_DGRAM, SOCK_RDM, and SOCK_SEQPACKET messages. * If the complete message doesn't fit in user area, truncate it. * * Returns size of returned message data, errno otherwise */
static int tipc_recvmsg(struct socket *sock, struct msghdr *m, size_t buf_len, int flags) { struct sock *sk = sock->sk; struct tipc_sock *tsk = tipc_sk(sk); struct sk_buff *buf; struct tipc_msg *msg; bool is_connectionless = tipc_sk_type_connectionless(sk); long timeo; unsigned int sz; u32 err; int res, hlen; /* Catch invalid receive requests */ if (unlikely(!buf_len)) return -EINVAL; lock_sock(sk); if (!is_connectionless && unlikely(sk->sk_state == TIPC_OPEN)) { res = -ENOTCONN; goto exit; } timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); restart: /* Look for a message in receive queue; wait if necessary */ res = tipc_wait_for_rcvmsg(sock, &timeo); if (res) goto exit; /* Look at first message in receive queue */ buf = skb_peek(&sk->sk_receive_queue); msg = buf_msg(buf); sz = msg_data_sz(msg); hlen = msg_hdr_sz(msg); err = msg_errcode(msg); /* Discard an empty non-errored message & try again */ if ((!sz) && (!err)) { tsk_advance_rx_queue(sk); goto restart; } /* Capture sender's address (optional) */ set_orig_addr(m, msg); /* Capture ancillary data (optional) */ res = tipc_sk_anc_data_recv(m, msg, tsk); if (res) goto exit; /* Capture message data (if valid) & compute return value (always) */ if (!err) { if (unlikely(buf_len < sz)) { sz = buf_len; m->msg_flags |= MSG_TRUNC; } res = skb_copy_datagram_msg(buf, hlen, m, sz); if (res) goto exit; res = sz; } else { if (is_connectionless || err == TIPC_CONN_SHUTDOWN || m->msg_control) res = 0; else res = -ECONNRESET; } if (unlikely(flags & MSG_PEEK)) goto exit; if (likely(!is_connectionless)) { tsk->rcv_unacked += tsk_inc(tsk, hlen + sz); if (unlikely(tsk->rcv_unacked >= (tsk->rcv_win / 4))) tipc_sk_send_ack(tsk); } tsk_advance_rx_queue(sk); exit: release_sock(sk); return res; }

Contributors

PersonTokensPropCommitsCommitProp
Per Liden24262.69%16.67%
Allan Stephens5815.03%320.00%
Jon Paul Maloy5714.77%533.33%
Parthasarathy Bhuvaragan174.40%213.33%
Ying Xue102.59%213.33%
David S. Miller10.26%16.67%
Arnaldo Carvalho de Melo10.26%16.67%
Total386100.00%15100.00%

/** * tipc_recv_stream - receive stream-oriented data * @m: descriptor for message info * @buf_len: total size of user buffer area * @flags: receive flags * * Used for SOCK_STREAM messages only. If not enough data is available * will optionally wait for more; never truncates data. * * Returns size of returned message data, errno otherwise */
static int tipc_recv_stream(struct socket *sock, struct msghdr *m, size_t buf_len, int flags) { struct sock *sk = sock->sk; struct tipc_sock *tsk = tipc_sk(sk); struct sk_buff *buf; struct tipc_msg *msg; long timeo; unsigned int sz; int target; int sz_copied = 0; u32 err; int res = 0, hlen; /* Catch invalid receive attempts */ if (unlikely(!buf_len)) return -EINVAL; lock_sock(sk); if (unlikely(sk->sk_state == TIPC_OPEN)) { res = -ENOTCONN; goto exit; } target = sock_rcvlowat(sk, flags & MSG_WAITALL, buf_len); timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); restart: /* Look for a message in receive queue; wait if necessary */ res = tipc_wait_for_rcvmsg(sock, &timeo); if (res) goto exit; /* Look at first message in receive queue */ buf = skb_peek(&sk->sk_receive_queue); msg = buf_msg(buf); sz = msg_data_sz(msg); hlen = msg_hdr_sz(msg); err = msg_errcode(msg); /* Discard an empty non-errored message & try again */ if ((!sz) && (!err)) { tsk_advance_rx_queue(sk); goto restart; } /* Optionally capture sender's address & ancillary data of first msg */ if (sz_copied == 0) { set_orig_addr(m, msg); res = tipc_sk_anc_data_recv(m, msg, tsk); if (res) goto exit; } /* Capture message data (if valid) & compute return value (always) */ if (!err) { u32 offset = TIPC_SKB_CB(buf)->bytes_read; u32 needed; int sz_to_copy; sz -= offset; needed = (buf_len - sz_copied); sz_to_copy = min(sz, needed); res = skb_copy_datagram_msg(buf, hlen + offset, m, sz_to_copy); if (res) goto exit; sz_copied += sz_to_copy; if (sz_to_copy < sz) { if (!(flags & MSG_PEEK)) TIPC_SKB_CB(buf)->bytes_read = offset + sz_to_copy; goto exit; } } else { if (sz_copied != 0) goto exit; /* can't add error msg to valid data */ if ((err == TIPC_CONN_SHUTDOWN) || m->msg_control) res = 0; else res = -ECONNRESET; } if (unlikely(flags & MSG_PEEK)) goto exit; tsk->rcv_unacked += tsk_inc(tsk, hlen + msg_data_sz(msg)); if (unlikely(tsk->rcv_unacked >= (tsk->rcv_win / 4))) tipc_sk_send_ack(tsk); tsk_advance_rx_queue(sk); /* Loop around if more data is required */ if ((sz_copied < buf_len) && /* didn't get all requested data */ (!skb_queue_empty(&sk->sk_receive_queue) || (sz_copied < target)) && /* and more is ready or required */ (!err)) /* and haven't reached a FIN */ goto restart; exit: release_sock(sk); return sz_copied ? sz_copied : res; }

Contributors

PersonTokensPropCommitsCommitProp
Per Liden31863.86%14.76%
Allan Stephens8517.07%523.81%
Jon Paul Maloy448.84%628.57%
Parthasarathy Bhuvaragan193.82%314.29%
Florian Westphal173.41%14.76%
Ying Xue102.01%29.52%
Joe Perches30.60%14.76%
Arnaldo Carvalho de Melo10.20%14.76%
David S. Miller10.20%14.76%
Total498100.00%21100.00%

/** * tipc_write_space - wake up thread if port congestion is released * @sk: socket */
static void tipc_write_space(struct sock *sk) { struct socket_wq *wq; rcu_read_lock(); wq = rcu_dereference(sk->sk_wq); if (skwq_has_sleeper(wq)) wake_up_interruptible_sync_poll(&wq->wait, POLLOUT | POLLWRNORM | POLLWRBAND); rcu_read_unlock(); }

Contributors

PersonTokensPropCommitsCommitProp
Ying Xue5198.08%150.00%
Herbert Xu11.92%150.00%
Total52100.00%2100.00%

/** * tipc_data_ready - wake up threads to indicate messages have been received * @sk: socket * @len: the length of messages */
static void tipc_data_ready(struct sock *sk) { struct socket_wq *wq; rcu_read_lock(); wq = rcu_dereference(sk->sk_wq); if (skwq_has_sleeper(wq)) wake_up_interruptible_sync_poll(&wq->wait, POLLIN | POLLRDNORM | POLLRDBAND); rcu_read_unlock(); }

Contributors

PersonTokensPropCommitsCommitProp
Ying Xue5198.08%150.00%
Herbert Xu11.92%150.00%
Total52100.00%2100.00%


static void tipc_sock_destruct(struct sock *sk) { __skb_queue_purge(&sk->sk_receive_queue); }

Contributors

PersonTokensPropCommitsCommitProp
Ying Xue19100.00%1100.00%
Total19100.00%1100.00%

/** * filter_connect - Handle all incoming messages for a connection-based socket * @tsk: TIPC socket * @skb: pointer to message buffer. Set to NULL if buffer is consumed * * Returns true if everything ok, false otherwise */
static bool filter_connect(struct tipc_sock *tsk, struct sk_buff *skb) { struct sock *sk = &tsk->sk; struct net *net = sock_net(sk); struct tipc_msg *hdr = buf_msg(skb); u32 pport = msg_origport(hdr); u32 pnode = msg_orignode(hdr); if (unlikely(msg_mcast(hdr))) return false; switch (sk->sk_state) { case TIPC_CONNECTING: /* Accept only ACK or NACK message */ if (unlikely(!msg_connected(hdr))) { if (pport != tsk_peer_port(tsk) || pnode != tsk_peer_node(tsk)) return false; tipc_set_sk_state(sk, TIPC_DISCONNECTING); sk->sk_err = ECONNREFUSED; sk->sk_state_change(sk); return true; } if (unlikely(msg_errcode(hdr))) { tipc_set_sk_state(sk, TIPC_DISCONNECTING); sk->sk_err = ECONNREFUSED; sk->sk_state_change(sk); return true; } if (unlikely(!msg_isdata(hdr))) { tipc_set_sk_state(sk, TIPC_DISCONNECTING); sk->sk_err = EINVAL; sk->sk_state_change(sk); return true; } tipc_sk_finish_conn(tsk, msg_origport(hdr), msg_orignode(hdr)); msg_set_importance(&tsk->phdr, msg_importance(hdr)); /* If 'ACK+' message, add to socket receive queue */ if (msg_data_sz(hdr)) return true; /* If empty 'ACK-' message, wake up sleeping connect() */ sk->sk_data_ready(sk); /* 'ACK-' message is neither accepted nor rejected: */ msg_set_dest_droppable(hdr, 1); return false; case TIPC_OPEN: case TIPC_DISCONNECTING: break; case TIPC_LISTEN: /* Accept only SYN message */ if (!msg_connected(hdr) && !(msg_errcode(hdr))) return true; break; case TIPC_ESTABLISHED: /* Accept only connection-based messages sent by peer */ if (unlikely(!tsk_peer_msg(tsk, hdr))) return false; if (unlikely(msg_errcode(hdr))) { tipc_set_sk_state(sk, TIPC_DISCONNECTING); /* Let timer expire on it's own */ tipc_node_remove_conn(net, tsk_peer_node(tsk), tsk->portid); sk->sk_state_change(sk); } return true; default: pr_err("Unknown sk_state %u\n", sk->sk_state); } return false; }

Contributors

PersonTokensPropCommitsCommitProp
Parthasarathy Bhuvaragan16744.06%633.33%
Jon Paul Maloy9625.33%633.33%
Ying Xue7018.47%316.67%
Per Liden379.76%15.56%
Allan Stephens92.37%211.11%
Total379100.00%18100.00%

/** * rcvbuf_limit - get proper overload limit of socket receive queue * @sk: socket * @skb: message * * For connection oriented messages, irrespective of importance, * default queue limit is 2 MB. * * For connectionless messages, queue limits are based on message * importance as follows: * * TIPC_LOW_IMPORTANCE (2 MB) * TIPC_MEDIUM_IMPORTANCE (4 MB) * TIPC_HIGH_IMPORTANCE (8 MB) * TIPC_CRITICAL_IMPORTANCE (16 MB) * * Returns overload limit according to corresponding message importance */
static unsigned int rcvbuf_limit(struct sock *sk, struct sk_buff *skb) { struct tipc_sock *tsk = tipc_sk(sk); struct tipc_msg *hdr = buf_msg(skb); if (unlikely(!msg_connected(hdr))) return sk->sk_rcvbuf << msg_importance(hdr); if (likely(tsk->peer_caps & TIPC_BLOCK_FLOWCTL)) return sk->sk_rcvbuf; return FLOWCTL_MSG_LIM; }

Contributors

PersonTokensPropCommitsCommitProp
Jon Paul Maloy3849.35%133.33%
Ying Xue3849.35%133.33%
Wang Weidong11.30%133.33%
Total77100.00%3100.00%

/** * filter_rcv - validate incoming message * @sk: socket * @skb: pointer to message. * * Enqueues message on receive queue if acceptable; optionally handles * disconnect indication for a connected socket. * * Called with socket lock already taken * * Returns true if message was added to socket receive queue, otherwise false */
static bool filter_rcv(struct sock *sk, struct sk_buff *skb, struct sk_buff_head *xmitq) { struct tipc_sock *tsk = tipc_sk(sk); struct tipc_msg *hdr = buf_msg(skb); unsigned int limit = rcvbuf_limit(sk, skb); int err = TIPC_OK; int usr = msg_user(hdr); u32 onode; if (unlikely(msg_user(hdr) == CONN_MANAGER)) { tipc_sk_proto_rcv(tsk, skb, xmitq); return false; } if (unlikely(usr == SOCK_WAKEUP)) { onode = msg_orignode(hdr); kfree_skb(skb); u32_del(&tsk->cong_links, onode); tsk->cong_link_cnt--; sk->sk_write_space(sk); return false; } /* Drop if illegal message type */ if (unlikely(msg_type(hdr) > TIPC_DIRECT_MSG)) { kfree_skb(skb); return false; } /* Reject if wrong message type for current socket state */ if (tipc_sk_type_connectionless(sk)) { if (msg_connected(hdr)) { err = TIPC_ERR_NO_PORT; goto reject; } } else if (unlikely(!filter_connect(tsk, skb))) { err = TIPC_ERR_NO_PORT; goto reject; } /* Reject message if there isn't room to queue it */ if (unlikely(sk_rmem_alloc_get(sk) + skb->truesize >= limit)) { err = TIPC_ERR_OVERLOAD; goto reject; } /* Enqueue message */ TIPC_SKB_CB(skb)->bytes_read = 0; __skb_queue_tail(&sk->sk_receive_queue, skb); skb_set_owner_r(skb, sk); sk->sk_data_ready(sk); return true; reject: if (tipc_msg_reverse(tsk_own_node(tsk), &skb, err)) __skb_queue_tail(xmitq, skb); return false; }

Contributors

PersonTokensPropCommitsCommitProp
Jon Paul Maloy19263.16%952.94%
Ying Xue6220.39%317.65%
Per Liden268.55%15.88%
Allan Stephens175.59%15.88%
Parthasarathy Bhuvaragan41.32%211.76%
Eric Dumazet30.99%15.88%
Total304100.00%17100.00%

/** * tipc_backlog_rcv - handle incoming message from backlog queue * @sk: socket * @skb: message * * Caller must hold socket lock * * Returns 0 */
static int tipc_backlog_rcv(struct sock *sk, struct sk_buff *skb) { unsigned int truesize = skb->truesize; struct sk_buff_head xmitq; u32 dnode, selector; __skb_queue_head_init(&xmitq); if (likely(filter_rcv(sk, skb, &xmitq))) { atomic_add(truesize, &tipc_sk(sk)->dupl_rcvcnt); return 0; } if (skb_queue_empty(&xmitq)) return 0; /* Send response/rejected message */ skb = __skb_dequeue(&xmitq); dnode = msg_destnode(buf_msg(skb)); selector = msg_origport(buf_msg(skb)); tipc_node_xmit_skb(sock_net(sk), skb, dnode, selector); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Jon Paul Maloy11488.37%666.67%
Allan Stephens129.30%111.11%
Ying Xue32.33%222.22%
Total129100.00%9100.00%

/** * tipc_sk_enqueue - extract all buffers with destination 'dport' from * inputq and try adding them to socket or backlog queue * @inputq: list of incoming buffers with potentially different destinations * @sk: socket where the buffers should be enqueued * @dport: port number for the socket * * Caller must hold socket lock */
static void tipc_sk_enqueue(struct sk_buff_head *inputq, struct sock *sk, u32 dport, struct sk_buff_head *xmitq) { unsigned long time_limit = jiffies + 2; struct sk_buff *skb; unsigned int lim; atomic_t *dcnt; u32 onode; while (skb_queue_len(inputq)) { if (unlikely(time_after_eq(jiffies, time_limit))) return; skb = tipc_skb_dequeue(inputq, dport); if (unlikely(!skb)) return; /* Add message directly to receive queue if possible */ if (!sock_owned_by_user(sk)) { filter_rcv(sk, skb, xmitq); continue; } /* Try backlog, compensating for double-counted bytes */ dcnt = &tipc_sk(sk)->dupl_rcvcnt; if (!sk->sk_backlog.len) atomic_set(dcnt, 0); lim = rcvbuf_limit(sk, skb) + atomic_read(dcnt); if (likely(!sk_add_backlog(sk, skb, lim))) continue; /* Overload => reject message back to sender */ onode = tipc_own_addr(sock_net(sk)); if (tipc_msg_reverse(onode, &skb, TIPC_ERR_OVERLOAD)) __skb_queue_tail(xmitq, skb); break; } }

Contributors

PersonTokensPropCommitsCommitProp
Jon Paul Maloy197100.00%6100.00%
Total197100.00%6100.00%

/** * tipc_sk_rcv - handle a chain of incoming buffers * @inputq: buffer list containing the buffers * Consumes all buffers in list until inputq is empty * Note: may be called in multiple threads referring to the same queue */
void tipc_sk_rcv(struct net *net, struct sk_buff_head *inputq) { struct sk_buff_head xmitq; u32 dnode, dport = 0; int err; struct tipc_sock *tsk; struct sock *sk; struct sk_buff *skb; __skb_queue_head_init(&xmitq); while (skb_queue_len(inputq)) { dport = tipc_skb_peek_port(inputq, dport); tsk = tipc_sk_lookup(net, dport); if (likely(tsk)) { sk = &tsk->sk; if (likely(spin_trylock_bh(&sk->sk_lock.slock))) { tipc_sk_enqueue(inputq, sk, dport, &xmitq); spin_unlock_bh(&sk->sk_lock.slock); } /* Send pending response/rejected messages, if any */ while ((skb = __skb_dequeue(&xmitq))) { dnode = msg_destnode(buf_msg(skb)); tipc_node_xmit_skb(net, skb, dnode, dport); } sock_put(sk); continue; } /* No destination socket => dequeue skb if still there */ skb = tipc_skb_dequeue(inputq, dport); if (!skb) return; /* Try secondary lookup if unresolved named message */ err = TIPC_ERR_NO_PORT; if (tipc_msg_lookup_dest(net, skb, &err)) goto xmit; /* Prepare for message rejection */ if (!tipc_msg_reverse(tipc_own_addr(net), &skb, err)) continue; xmit: dnode = msg_destnode(buf_msg(skb)); tipc_node_xmit_skb(net, skb, dnode, dport); } }

Contributors

PersonTokensPropCommitsCommitProp
Jon Paul Maloy20782.47%1456.00%
Ying Xue2811.16%728.00%
Allan Stephens83.19%28.00%
Per Liden72.79%14.00%
Eric Dumazet10.40%14.00%
Total251100.00%25100.00%


static int tipc_wait_for_connect(struct socket *sock, long *timeo_p) { DEFINE_WAIT_FUNC(wait, woken_wake_function); struct sock *sk = sock->sk; int done; do { int err = sock_error(sk); if (err) return err; if (!*timeo_p) return -ETIMEDOUT; if (signal_pending(current)) return sock_intr_errno(*timeo_p); add_wait_queue(sk_sleep(sk), &wait); done = sk_wait_event(sk, timeo_p, sk->sk_state != TIPC_CONNECTING, &wait); remove_wait_queue(sk_sleep(sk), &wait); } while (!done); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Ying Xue11088.00%133.33%
Américo Wang129.60%133.33%
Parthasarathy Bhuvaragan32.40%133.33%
Total125100.00%3100.00%

/** * tipc_connect - establish a connection to another TIPC port * @sock: socket structure * @dest: socket address for destination port * @destlen: size of socket address data structure * @flags: file-related flags associated with socket * * Returns 0 on success, errno otherwise */
static int tipc_connect(struct socket *sock, struct sockaddr *dest, int destlen, int flags) { struct sock *sk = sock->sk; struct tipc_sock *tsk = tipc_sk(sk); struct sockaddr_tipc *dst = (struct sockaddr_tipc *)dest; struct msghdr m = {NULL,}; long timeout = (flags & O_NONBLOCK) ? 0 : tsk->conn_timeout; int previous; int res = 0; lock_sock(sk); /* DGRAM/RDM connect(), just save the destaddr */ if (tipc_sk_type_connectionless(sk)) { if (dst->family == AF_UNSPEC) { memset(&tsk->peer, 0, sizeof(struct sockaddr_tipc)); } else if (destlen != sizeof(struct sockaddr_tipc)) { res = -EINVAL; } else { memcpy(&tsk->peer, dest, destlen); } goto exit; } /* * Reject connection attempt using multicast address * * Note: send_msg() validates the rest of the address fields, * so there's no need to do it here */ if (dst->addrtype == TIPC_ADDR_MCAST) { res = -EINVAL; goto exit; } previous = sk->sk_state; switch (sk->sk_state) { case TIPC_OPEN: /* Send a 'SYN-' to destination */ m.msg_name = dest; m.msg_namelen = destlen; /* If connect is in non-blocking case, set MSG_DONTWAIT to * indicate send_msg() is never blocked. */ if (!timeout) m.msg_flags = MSG_DONTWAIT; res = __tipc_sendmsg(sock, &m, 0); if ((res < 0) && (res != -EWOULDBLOCK)) goto exit; /* Just entered TIPC_CONNECTING state; the only * difference is that return value in non-blocking * case is EINPROGRESS, rather than EALREADY. */ res = -EINPROGRESS; /* fall thru' */ case TIPC_CONNECTING: if (!timeout) { if (previous == TIPC_CONNECTING) res = -EALREADY; goto exit; } timeout = msecs_to_jiffies(timeout); /* Wait until an 'ACK' or 'RST' arrives, or a timeout occurs */ res = tipc_wait_for_connect(sock, &timeout); break; case TIPC_ESTABLISHED: res = -EISCONN; break; default: res = -EINVAL; } exit: release_sock(sk); return res; }

Contributors

PersonTokensPropCommitsCommitProp
Per Liden9629.36%15.26%
Ying Xue7422.63%421.05%
Erik Hugne5316.21%15.26%
Allan Stephens5215.90%526.32%
Parthasarathy Bhuvaragan329.79%526.32%
Sasha Levin185.50%15.26%
Eric Dumazet10.31%15.26%
Sam Ravnborg10.31%15.26%
Total327100.00%19100.00%

/** * tipc_listen - allow socket to listen for incoming connections * @sock: socket structure * @len: (unused) * * Returns 0 on success, errno otherwise */
static int tipc_listen(struct socket *sock, int len) { struct sock *sk = sock->sk; int res; lock_sock(sk); res = tipc_set_sk_state(sk, TIPC_LISTEN); release_sock(sk); return res; }

Contributors

PersonTokensPropCommitsCommitProp
Allan Stephens2756.25%125.00%
Per Liden1429.17%125.00%
Parthasarathy Bhuvaragan612.50%125.00%
Ying Xue12.08%125.00%
Total48100.00%4100.00%


static int tipc_wait_for_accept(struct socket *sock, long timeo) { struct sock *sk = sock->sk; DEFINE_WAIT(wait); int err; /* True wake-one mechanism for incoming connections: only * one process gets woken up, not the 'whole herd'. * Since we do not 'race & poll' for established sockets * anymore, the common case will execute the loop only once. */ for (;;) { prepare_to_wait_exclusive(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { release_sock(sk); timeo = schedule_timeout(timeo); lock_sock(sk); } err = 0; if (!skb_queue_empty(&sk->sk_receive_queue)) break; err = -EAGAIN; if (!timeo) break; err = sock_intr_errno(timeo); if (signal_pending(current)) break; } finish_wait(sk_sleep(sk), &wait); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Ying Xue12992.81%266.67%
Erik Hugne107.19%133.33%
Total139100.00%3100.00%

/** * tipc_accept - wait for connection request * @sock: listening socket * @newsock: new socket that is to be connected * @flags: file-related flags associated with socket * * Returns 0 on success, errno otherwise */
static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags, bool kern) { struct sock *new_sk, *sk = sock->sk; struct sk_buff *buf; struct tipc_sock *new_tsock; struct tipc_msg *msg; long timeo; int res; lock_sock(sk); if (sk->sk_state != TIPC_LISTEN) { res = -EINVAL; goto exit; } timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); res = tipc_wait_for_accept(sock, timeo); if (res) goto exit; buf = skb_peek(&sk->sk_receive_queue); res = tipc_sk_create(sock_net(sock->sk), new_sock, 0, kern); if (res) goto exit; security_sk_clone(sock->sk, new_sock->sk); new_sk = new_sock->sk; new_tsock = tipc_sk(new_sk); msg = buf_msg(buf); /* we lock on new_sk; but lockdep sees the lock on sk */ lock_sock_nested(new_sk, SINGLE_DEPTH_NESTING); /* * Reject any stray messages received by new socket * before the socket lock was taken (very, very unlikely) */ tsk_rej_rx_queue(new_sk); /* Connect new socket to it's peer */ tipc_sk_finish_conn(new_tsock, msg_origport(msg), msg_orignode(msg)); tsk_set_importance(new_tsock, msg_importance(msg)); if (msg_named(msg)) { new_tsock->conn_type = msg_nametype(msg); new_tsock->conn_instance = msg_nameinst(msg); } /* * Respond to 'SYN-' by discarding it & returning 'ACK'-. * Respond to 'SYN+' by queuing it on new socket. */ if (!msg_data_sz(msg)) { struct msghdr m = {NULL,}; tsk_advance_rx_queue(sk); __tipc_sendstream(new_sock, &m, 0); } else { __skb_dequeue(&sk->sk_receive_queue); __skb_queue_head(&new_sk->sk_receive_queue, buf); skb_set_owner_r(buf, new_sk); } release_sock(new_sk); exit: release_sock(sk); return res; }

Contributors

PersonTokensPropCommitsCommitProp
Per Liden17455.24%14.76%
Allan Stephens5216.51%14.76%
Ying Xue237.30%523.81%
Paul Gortmaker226.98%14.76%
Jon Paul Maloy165.08%523.81%
Stephen D. Smalley113.49%14.76%
David Howells41.27%14.76%
Eric W. Biedermann41.27%14.76%
Parthasarathy Bhuvaragan30.95%14.76%
Hideaki Yoshifuji / 吉藤英明30.95%14.76%
Eric Dumazet10.32%14.76%
Eric Paris10.32%14.76%
Sam Ravnborg10.32%14.76%
Total315100.00%21100.00%

/** * tipc_shutdown - shutdown socket connection * @sock: socket structure * @how: direction to close (must be SHUT_RDWR) * * Terminates connection (if necessary), then purges socket's receive queue. * * Returns 0 on success, errno otherwise */
static int tipc_shutdown(struct socket *sock, int how) { struct sock *sk = sock->sk; int res; if (how != SHUT_RDWR) return -EINVAL; lock_sock(sk); __tipc_shutdown(sock, TIPC_CONN_SHUTDOWN); sk->sk_shutdown = SEND_SHUTDOWN; if (sk->sk_state == TIPC_DISCONNECTING) { /* Discard any unreceived messages */ __skb_queue_purge(&sk->sk_receive_queue); /* Wake up anyone sleeping in poll */ sk->sk_state_change(sk); res = 0; } else { res = -ENOTCONN; } release_sock(sk); return res; }

Contributors

PersonTokensPropCommitsCommitProp
Per Liden4241.58%19.09%
Allan Stephens2120.79%218.18%
Parthasarathy Bhuvaragan1817.82%218.18%
Ying Xue98.91%327.27%
Jon Paul Maloy76.93%218.18%
Eric Dumazet43.96%19.09%
Total101100.00%11100.00%


static void tipc_sk_timeout(unsigned long data) { struct tipc_sock *tsk = (struct tipc_sock *)data; struct sock *sk = &tsk->sk; struct sk_buff *skb = NULL; u32 peer_port, peer_node; u32 own_node = tsk_own_node(tsk); bh_lock_sock(sk); if (!tipc_sk_connected(sk)) { bh_unlock_sock(sk); goto exit; } peer_port = tsk_peer_port(tsk); peer_node = tsk_peer_node(tsk); if (tsk->probe_unacked) { if (!sock_owned_by_user(sk)) { tipc_set_sk_state(sk, TIPC_DISCONNECTING); tipc_node_remove_conn(sock_net(sk), tsk_peer_node(tsk), tsk_peer_port(tsk)); sk->sk_state_change(sk); } else { /* Try again later */ sk_reset_timer(sk, &sk->sk_timer, (HZ / 20)); } bh_unlock_sock(sk); goto exit; } skb = tipc_msg_create(CONN_MANAGER, CONN_PROBE, INT_H_SIZE, 0, peer_node, own_node, peer_port, tsk->portid, TIPC_OK); tsk->probe_unacked = true; sk_reset_timer(sk, &sk->sk_timer, jiffies + CONN_PROBING_INTERVAL); bh_unlock_sock(sk); if (skb) tipc_node_xmit_skb(sock_net(sk), skb, peer_node, tsk->portid); exit: sock_put(sk); }

Contributors

PersonTokensPropCommitsCommitProp
Jon Paul Maloy13655.74%738.89%
Erik Hugne4819.67%15.56%
Ying Xue3915.98%633.33%
Parthasarathy Bhuvaragan218.61%422.22%
Total244100.00%18100.00%


static int tipc_sk_publish(struct tipc_sock *tsk, uint scope, struct tipc_name_seq const *seq) { struct sock *sk = &tsk->sk; struct net *net = sock_net(sk); struct publication *publ; u32 key; if (tipc_sk_connected(sk)) return -EINVAL; key = tsk->portid + tsk->pub_count + 1; if (key == tsk->portid) return -EADDRINUSE; publ = tipc_nametbl_publish(net, seq->type, seq->lower, seq->upper, scope, tsk->portid, key); if (unlikely(!publ)) return -EINVAL; list_add(&publ->pport_list, &tsk->publications); tsk->pub_count++; tsk->published = 1; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Jon Paul Maloy12080.54%240.00%
Ying Xue1510.07%240.00%
Parthasarathy Bhuvaragan149.40%120.00%
Total149100.00%5100.00%


static int tipc_sk_withdraw(struct tipc_sock *tsk, uint scope, struct tipc_name_seq const *seq) { struct net *net = sock_net(&tsk->sk); struct publication *publ; struct publication *safe; int rc = -EINVAL; list_for_each_entry_safe(publ, safe, &tsk->publications, pport_list) { if (seq) { if (publ->scope != scope) continue; if (publ->type != seq->type) continue; if (publ->lower != seq->lower) continue; if (publ->upper != seq->upper) break; tipc_nametbl_withdraw(net, publ->type, publ->lower, publ->ref, publ->key); rc = 0; break; } tipc_nametbl_withdraw(net, publ->type, publ->lower, publ->ref, publ->key); rc = 0; } if (list_empty(&tsk->publications)) tsk->published = 0; return rc; }

Contributors

PersonTokensPropCommitsCommitProp
Jon Paul Maloy16290.50%266.67%
Ying Xue179.50%133.33%
Total179100.00%3100.00%

/* tipc_sk_reinit: set non-zero address in all existing sockets * when we go from standalone to network mode. */
void tipc_sk_reinit(struct net *net) { struct tipc_net *tn = net_generic(net, tipc_net_id); struct rhashtable_iter iter; struct tipc_sock *tsk; struct tipc_msg *msg; rhashtable_walk_enter(&tn->sk_rht, &iter); do { tsk = ERR_PTR(rhashtable_walk_start(&iter)); if (tsk) continue; while ((tsk = rhashtable_walk_next(&iter)) && !IS_ERR(tsk)) { spin_lock_bh(&tsk->sk.sk_lock.slock); msg = &tsk->phdr; msg_set_prevnode(msg, tn->own_addr); msg_set_orignode(msg, tn->own_addr); spin_unlock_bh(&tsk->sk.sk_lock.slock); } rhashtable_walk_stop(&iter); } while (tsk == ERR_PTR(-EAGAIN)); }

Contributors

PersonTokensPropCommitsCommitProp
Herbert Xu5435.53%120.00%
Jon Paul Maloy5133.55%120.00%
Ying Xue4730.92%360.00%
Total152100.00%5100.00%


static struct tipc_sock *tipc_sk_lookup(struct net *net, u32 portid) { struct tipc_net *tn = net_generic(net, tipc_net_id); struct tipc_sock *tsk; rcu_read_lock(); tsk = rhashtable_lookup_fast(&tn->sk_rht, &portid, tsk_rht_params); if (tsk) sock_hold(&tsk->sk); rcu_read_unlock(); return tsk; }

Contributors

PersonTokensPropCommitsCommitProp
Ying Xue4362.32%250.00%
Jon Paul Maloy2333.33%125.00%
Herbert Xu34.35%125.00%
Total69100.00%4100.00%


static int tipc_sk_insert(struct tipc_sock *tsk) { struct sock *sk = &tsk->sk; struct net *net = sock_net(sk); struct tipc_net *tn = net_generic(net, tipc_net_id); u32 remaining = (TIPC_MAX_PORT - TIPC_MIN_PORT) + 1; u32 portid = prandom_u32() % remaining + TIPC_MIN_PORT; while (remaining--) { portid++; if ((portid < TIPC_MIN_PORT) || (portid > TIPC_MAX_PORT)) portid = TIPC_MIN_PORT; tsk->portid = portid; sock_hold(&tsk->sk); if (!rhashtable_lookup_insert_fast(&tn->sk_rht, &tsk->node, tsk_rht_params)) return 0; sock_put(&tsk->sk); } return -1; }

Contributors

PersonTokensPropCommitsCommitProp
Ying Xue8359.71%250.00%
Jon Paul Maloy5237.41%125.00%
Herbert Xu42.88%125.00%
Total139100.00%4100.00%


static void tipc_sk_remove(struct tipc_sock *tsk) { struct sock *sk = &tsk->sk; struct tipc_net *tn = net_generic(sock_net(sk), tipc_net_id); if (!rhashtable_remove_fast(&tn->sk_rht, &tsk->node, tsk_rht_params)) { WARN_ON(atomic_read(&sk->sk_refcnt) == 1); __sock_put(sk); } }

Contributors

PersonTokensPropCommitsCommitProp
Ying Xue4763.51%250.00%
Jon Paul Maloy2331.08%125.00%
Herbert Xu45.41%125.00%
Total74100.00%4100.00%

static const struct rhashtable_params tsk_rht_params = { .nelem_hint = 192, .head_offset = offsetof(struct tipc_sock, node), .key_offset = offsetof(struct tipc_sock, portid), .key_len = sizeof(u32), /* portid */ .max_size = 1048576, .min_size = 256, .automatic_shrinking = true, };
int tipc_sk_rht_init(struct net *net) { struct tipc_net *tn = net_generic(net, tipc_net_id); return rhashtable_init(&tn->sk_rht, &tsk_rht_params); }

Contributors

PersonTokensPropCommitsCommitProp
Herbert Xu2161.76%125.00%
Ying Xue1029.41%250.00%
Jon Paul Maloy38.82%125.00%
Total34100.00%4100.00%


void tipc_sk_rht_destroy(struct net *net) { struct tipc_net *tn = net_generic(net, tipc_net_id); /* Wait for socket readers to complete */ synchronize_net(); rhashtable_destroy(&tn->sk_rht); }

Contributors

PersonTokensPropCommitsCommitProp
Ying Xue2573.53%266.67%
Jon Paul Maloy926.47%133.33%
Total34100.00%3100.00%

/** * tipc_setsockopt - set socket option * @sock: socket structure * @lvl: option level * @opt: option identifier * @ov: pointer to new option value * @ol: length of option value * * For stream sockets only, accepts and ignores all IPPROTO_TCP options * (to ease compatibility). * * Returns 0 on success, errno otherwise */
static int tipc_setsockopt(struct socket *sock, int lvl, int opt, char __user *ov, unsigned int ol) { struct sock *sk = sock->sk; struct tipc_sock *tsk = tipc_sk(sk); u32 value = 0; int res = 0; if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) return 0; if (lvl != SOL_TIPC) return -ENOPROTOOPT; switch (opt) { case TIPC_IMPORTANCE: case TIPC_SRC_DROPPABLE: case TIPC_DEST_DROPPABLE: case TIPC_CONN_TIMEOUT: if (ol < sizeof(value)) return -EINVAL; res = get_user(value, (u32 __user *)ov); if (res) return res; break; default: if (ov || ol) return -EINVAL; } lock_sock(sk); switch (opt) { case TIPC_IMPORTANCE: res = tsk_set_importance(tsk, value); break; case TIPC_SRC_DROPPABLE: if (sock->type != SOCK_STREAM) tsk_set_unreliable(tsk, value); else res = -ENOPROTOOPT; break; case TIPC_DEST_DROPPABLE: tsk_set_unreturnable(tsk, value); break; case TIPC_CONN_TIMEOUT: tipc_sk(sk)->conn_timeout = value; break; case TIPC_MCAST_BROADCAST: tsk->mc_method.rcast = false; tsk->mc_method.mandatory = true; break; case TIPC_MCAST_REPLICAST: tsk->mc_method.rcast = true; tsk->mc_method.mandatory = true; break; default: res = -EINVAL; } release_sock(sk); return res; }

Contributors

PersonTokensPropCommitsCommitProp
Per Liden16560.00%17.14%
Jon Paul Maloy8129.45%428.57%
Allan Stephens228.00%428.57%
Erik Hugne20.73%17.14%
Dan Carpenter20.73%17.14%
Ying Xue10.36%17.14%
David S. Miller10.36%17.14%
Al Viro10.36%17.14%
Total275100.00%14100.00%

/** * tipc_getsockopt - get socket option * @sock: socket structure * @lvl: option level * @opt: option identifier * @ov: receptacle for option value * @ol: receptacle for length of option value * * For stream sockets only, returns 0 length result for all IPPROTO_TCP options * (to ease compatibility). * * Returns 0 on success, errno otherwise */
static int tipc_getsockopt(struct socket *sock, int lvl, int opt, char __user *ov, int __user *ol) { struct sock *sk = sock->sk; struct tipc_sock *tsk = tipc_sk(sk); int len; u32 value; int res; if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) return put_user(0, ol); if (lvl != SOL_TIPC) return -ENOPROTOOPT; res = get_user(len, ol); if (res) return res; lock_sock(sk); switch (opt) { case TIPC_IMPORTANCE: value = tsk_importance(tsk); break; case TIPC_SRC_DROPPABLE: value = tsk_unreliable(tsk); break; case TIPC_DEST_DROPPABLE: value = tsk_unreturnable(tsk); break; case TIPC_CONN_TIMEOUT: value = tsk->conn_timeout; /* no need to set "res", since already 0 at this point */ break; case TIPC_NODE_RECVQ_DEPTH: value = 0; /* was tipc_queue_size, now obsolete */ break; case TIPC_SOCK_RECVQ_DEPTH: value = skb_queue_len(&sk->sk_receive_queue); break; default: res = -EINVAL; } release_sock(sk); if (res) return res; /* "get" failed */ if (len < sizeof(value)) return -EINVAL; if (copy_to_user(ov, &value, sizeof(value))) return -EFAULT; return put_user(sizeof(value), ol); }

Contributors

PersonTokensPropCommitsCommitProp
Per Liden17471.02%16.67%
Allan Stephens239.39%426.67%
oscar.medina@motorola.com218.57%16.67%
Jon Paul Maloy135.31%426.67%
Paul Gortmaker83.27%16.67%
Ying Xue31.22%213.33%
Pavel Emelyanov20.82%16.67%
Al Viro10.41%16.67%
Total245100.00%15100.00%


static int tipc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) { struct sock *sk = sock->sk; struct tipc_sioc_ln_req lnr; void __user *argp = (void __user *)arg; switch (cmd) { case SIOCGETLINKNAME: if (copy_from_user(&lnr, argp, sizeof(lnr))) return -EFAULT; if (!tipc_node_get_linkname(sock_net(sk), lnr.bearer_id & 0xffff, lnr.peer, lnr.linkname, TIPC_MAX_LINK_NAME)) { if (copy_to_user(argp, &lnr, sizeof(lnr))) return -EFAULT; return 0; } return -EADDRNOTAVAIL; default: return -ENOIOCTLCMD; } }

Contributors

PersonTokensPropCommitsCommitProp
Erik Hugne11486.36%125.00%
Ying Xue1712.88%250.00%
Wei Yongjun10.76%125.00%
Total132100.00%4100.00%

/* Protocol switches for the various types of TIPC sockets */ static const struct proto_ops msg_ops = { .owner = THIS_MODULE, .family = AF_TIPC, .release = tipc_release, .bind = tipc_bind, .connect = tipc_connect, .socketpair = sock_no_socketpair, .accept = sock_no_accept, .getname = tipc_getname, .poll = tipc_poll, .ioctl = tipc_ioctl, .listen = sock_no_listen, .shutdown = tipc_shutdown, .setsockopt = tipc_setsockopt, .getsockopt = tipc_getsockopt, .sendmsg = tipc_sendmsg, .recvmsg = tipc_recvmsg, .mmap = sock_no_mmap, .sendpage = sock_no_sendpage }; static const struct proto_ops packet_ops = { .owner = THIS_MODULE, .family = AF_TIPC, .release = tipc_release, .bind = tipc_bind, .connect = tipc_connect, .socketpair = sock_no_socketpair, .accept = tipc_accept, .getname = tipc_getname, .poll = tipc_poll, .ioctl = tipc_ioctl, .listen = tipc_listen, .shutdown = tipc_shutdown, .setsockopt = tipc_setsockopt, .getsockopt = tipc_getsockopt, .sendmsg = tipc_send_packet, .recvmsg = tipc_recvmsg, .mmap = sock_no_mmap, .sendpage = sock_no_sendpage }; static const struct proto_ops stream_ops = { .owner = THIS_MODULE, .family = AF_TIPC, .release = tipc_release, .bind = tipc_bind, .connect = tipc_connect, .socketpair = sock_no_socketpair, .accept = tipc_accept, .getname = tipc_getname, .poll = tipc_poll, .ioctl = tipc_ioctl, .listen = tipc_listen, .shutdown = tipc_shutdown, .setsockopt = tipc_setsockopt, .getsockopt = tipc_getsockopt, .sendmsg = tipc_sendstream, .recvmsg = tipc_recv_stream, .mmap = sock_no_mmap, .sendpage = sock_no_sendpage }; static const struct net_proto_family tipc_family_ops = { .owner = THIS_MODULE, .family = AF_TIPC, .create = tipc_sk_create }; static struct proto tipc_proto = { .name = "TIPC", .owner = THIS_MODULE, .obj_size = sizeof(struct tipc_sock), .sysctl_rmem = sysctl_tipc_rmem }; /** * tipc_socket_init - initialize TIPC socket interface * * Returns 0 on success, errno otherwise */
int tipc_socket_init(void) { int res; res = proto_register(&tipc_proto, 1); if (res) { pr_err("Failed to register TIPC protocol type\n"); goto out; } res = sock_register(&tipc_family_ops); if (res) { pr_err("Failed to register TIPC socket type\n"); proto_unregister(&tipc_proto); goto out; } out: return res; }

Contributors

PersonTokensPropCommitsCommitProp
Per Liden6597.01%375.00%
Erik Hugne22.99%125.00%
Total67100.00%4100.00%

/** * tipc_socket_stop - stop TIPC socket interface */
void tipc_socket_stop(void) { sock_unregister(tipc_family_ops.family); proto_unregister(&tipc_proto); }

Contributors

PersonTokensPropCommitsCommitProp
Per Liden20100.00%2100.00%
Total20100.00%2100.00%

/* Caller should hold socket lock for the passed tipc socket. */
static int __tipc_nl_add_sk_con(struct sk_buff *skb, struct tipc_sock *tsk) { u32 peer_node; u32 peer_port; struct nlattr *nest; peer_node = tsk_peer_node(tsk); peer_port = tsk_peer_port(tsk); nest = nla_nest_start(skb, TIPC_NLA_SOCK_CON); if (nla_put_u32(skb, TIPC_NLA_CON_NODE, peer_node)) goto msg_full; if (nla_put_u32(skb, TIPC_NLA_CON_SOCK, peer_port)) goto msg_full; if (tsk->conn_type != 0) { if (nla_put_flag(skb, TIPC_NLA_CON_FLAG)) goto msg_full; if (nla_put_u32(skb, TIPC_NLA_CON_TYPE, tsk->conn_type)) goto msg_full; if (nla_put_u32(skb, TIPC_NLA_CON_INST, tsk->conn_instance)) goto msg_full; } nla_nest_end(skb, nest); return 0; msg_full: nla_nest_cancel(skb, nest); return -EMSGSIZE; }

Contributors

PersonTokensPropCommitsCommitProp
Richard Alpe155100.00%2100.00%
Total155100.00%2100.00%

/* 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; hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, &tipc_genl_family, NLM_F_MULTI, TIPC_NL_SOCK_GET); if (!hdr) goto msg_cancel; 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)) 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); return 0; attr_msg_cancel: nla_nest_cancel(skb, attrs); genlmsg_cancel: genlmsg_cancel(skb, hdr); msg_cancel: return -EMSGSIZE; }

Contributors

PersonTokensPropCommitsCommitProp
Richard Alpe20382.86%350.00%
Ying Xue2811.43%233.33%
Parthasarathy Bhuvaragan145.71%116.67%
Total245100.00%6100.00%


int tipc_nl_sk_dump(struct sk_buff *skb, struct netlink_callback *cb) { 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]; u32 prev_portid = cb->args[1]; rcu_read_lock(); tbl = rht_dereference_rcu((&tn->sk_rht)->tbl, &tn->sk_rht); for (; tbl_id < tbl->size; tbl_id++) { rht_for_each_entry_rcu(tsk, pos, tbl, tbl_id, node) { spin_lock_bh(&tsk->sk.sk_lock.slock); if (prev_portid && prev_portid != tsk->portid) { spin_unlock_bh(&tsk->sk.sk_lock.slock); continue; } err = __tipc_nl_add_sk(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); } } out: rcu_read_unlock(); cb->args[0] = tbl_id; cb->args[1] = prev_portid; return skb->len; }

Contributors

PersonTokensPropCommitsCommitProp
Richard Alpe15863.97%250.00%
Ying Xue8936.03%250.00%
Total247100.00%4100.00%

/* Caller should hold socket lock for the passed tipc socket. */
static int __tipc_nl_add_sk_publ(struct sk_buff *skb, struct netlink_callback *cb, struct publication *publ) { void *hdr; struct nlattr *attrs; hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, &tipc_genl_family, NLM_F_MULTI, TIPC_NL_PUBL_GET); if (!hdr) goto msg_cancel; attrs = nla_nest_start(skb, TIPC_NLA_PUBL); if (!attrs) goto genlmsg_cancel; if (nla_put_u32(skb, TIPC_NLA_PUBL_KEY, publ->key)) goto attr_msg_cancel; if (nla_put_u32(skb, TIPC_NLA_PUBL_TYPE, publ->type)) goto attr_msg_cancel; if (nla_put_u32(skb, TIPC_NLA_PUBL_LOWER, publ->lower)) goto attr_msg_cancel; if (nla_put_u32(skb, TIPC_NLA_PUBL_UPPER, publ->upper)) goto attr_msg_cancel; nla_nest_end(skb, attrs); genlmsg_end(skb, hdr); return 0; attr_msg_cancel: nla_nest_cancel(skb, attrs); genlmsg_cancel: genlmsg_cancel(skb, hdr); msg_cancel: return -EMSGSIZE; }

Contributors

PersonTokensPropCommitsCommitProp
Richard Alpe189100.00%3100.00%
Total189100.00%3100.00%

/* Caller should hold socket lock for the passed tipc socket. */
static int __tipc_nl_list_sk_publ(struct sk_buff *skb, struct netlink_callback *cb, struct tipc_sock *tsk, u32 *last_publ) { int err; struct publication *p; if (*last_publ) { list_for_each_entry(p, &tsk->publications, pport_list) { if (p->key == *last_publ) break; } if (p->key != *last_publ) { /* We never set seq or call nl_dump_check_consistent() * this means that setting prev_seq here will cause the * consistence check to fail in the netlink callback * handler. Resulting in the last NLMSG_DONE message * having the NLM_F_DUMP_INTR flag set. */ cb->prev_seq = 1; *last_publ = 0; return -EPIPE; } } else { p = list_first_entry(&tsk->publications, struct publication, pport_list); } list_for_each_entry_from(p, &tsk->publications, pport_list) { err = __tipc_nl_add_sk_publ(skb, cb, p); if (err) { *last_publ = p->key; return err; } } *last_publ = 0; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Richard Alpe150100.00%2100.00%
Total150100.00%2100.00%


int tipc_nl_publ_dump(struct sk_buff *skb, struct netlink_callback *cb) { int err; u32 tsk_portid = cb->args[0]; u32 last_publ = cb->args[1]; u32 done = cb->args[2]; struct net *net = sock_net(skb->sk); struct tipc_sock *tsk; if (!tsk_portid) { struct nlattr **attrs; struct nlattr *sock[TIPC_NLA_SOCK_MAX + 1]; err = tipc_nlmsg_parse(cb->nlh, &attrs); if (err) return err; if (!attrs[TIPC_NLA_SOCK]) return -EINVAL; err = nla_parse_nested(sock, TIPC_NLA_SOCK_MAX, attrs[TIPC_NLA_SOCK], tipc_nl_sock_policy); if (err) return err; if (!sock[TIPC_NLA_SOCK_REF]) return -EINVAL; tsk_portid = nla_get_u32(sock[TIPC_NLA_SOCK_REF]); } if (done) return 0; tsk = tipc_sk_lookup(net, tsk_portid); if (!tsk) return -EINVAL; lock_sock(&tsk->sk); err = __tipc_nl_list_sk_publ(skb, cb, tsk, &last_publ); if (!err) done = 1; release_sock(&tsk->sk); sock_put(&tsk->sk); cb->args[0] = tsk_portid; cb->args[1] = last_publ; cb->args[2] = done; return skb->len; }

Contributors

PersonTokensPropCommitsCommitProp
Richard Alpe24491.04%250.00%
Ying Xue248.96%250.00%
Total268100.00%4100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Jon Paul Maloy432734.40%5728.08%
Per Liden271521.58%31.48%
Ying Xue204916.29%3517.24%
Richard Alpe11068.79%73.45%
Parthasarathy Bhuvaragan9377.45%199.36%
Allan Stephens7776.18%3014.78%
Erik Hugne2882.29%94.43%
Herbert Xu1240.99%41.97%
Paul Gortmaker320.25%31.48%
Florian Westphal240.19%20.99%
Sasha Levin230.18%20.99%
oscar.medina@motorola.com210.17%10.49%
Mathias Krause170.14%10.49%
Arnaldo Carvalho de Melo150.12%10.49%
Vasiliy Kulikov130.10%10.49%
Eric Dumazet130.10%20.99%
Eric W. Biedermann130.10%20.99%
Américo Wang120.10%10.49%
Stephen D. Smalley110.09%10.49%
Al Viro100.08%41.97%
Steffen Hurrle90.07%10.49%
David Howells70.06%10.49%
Thomas Graf50.04%10.49%
Hideaki Yoshifuji / 吉藤英明50.04%20.99%
Eric Paris40.03%10.49%
Sam Ravnborg40.03%10.49%
David S. Miller30.02%20.99%
Joe Perches30.02%10.49%
Ingo Molnar30.02%10.49%
Dan Carpenter20.02%10.49%
Wei Yongjun20.02%10.49%
Pavel Emelyanov20.02%10.49%
Geert Uytterhoeven10.01%10.49%
Masanari Iida10.01%10.49%
Ben Hutchings10.01%10.49%
Wang Weidong10.01%10.49%
Total12580100.00%203100.00%
Directory: net/tipc
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