Release 4.7 net/unix/af_unix.c
/*
* NET4: Implementation of BSD Unix domain sockets.
*
* Authors: Alan Cox, <alan@lxorguk.ukuu.org.uk>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
* Fixes:
* Linus Torvalds : Assorted bug cures.
* Niibe Yutaka : async I/O support.
* Carsten Paeth : PF_UNIX check, address fixes.
* Alan Cox : Limit size of allocated blocks.
* Alan Cox : Fixed the stupid socketpair bug.
* Alan Cox : BSD compatibility fine tuning.
* Alan Cox : Fixed a bug in connect when interrupted.
* Alan Cox : Sorted out a proper draft version of
* file descriptor passing hacked up from
* Mike Shaver's work.
* Marty Leisner : Fixes to fd passing
* Nick Nevin : recvmsg bugfix.
* Alan Cox : Started proper garbage collector
* Heiko EiBfeldt : Missing verify_area check
* Alan Cox : Started POSIXisms
* Andreas Schwab : Replace inode by dentry for proper
* reference counting
* Kirk Petersen : Made this a module
* Christoph Rohland : Elegant non-blocking accept/connect algorithm.
* Lots of bug fixes.
* Alexey Kuznetosv : Repaired (I hope) bugs introduces
* by above two patches.
* Andrea Arcangeli : If possible we block in connect(2)
* if the max backlog of the listen socket
* is been reached. This won't break
* old apps and it will avoid huge amount
* of socks hashed (this for unix_gc()
* performances reasons).
* Security fix that limits the max
* number of socks to 2*max_files and
* the number of skb queueable in the
* dgram receiver.
* Artur Skawina : Hash function optimizations
* Alexey Kuznetsov : Full scale SMP. Lot of bugs are introduced 8)
* Malcolm Beattie : Set peercred for socketpair
* Michal Ostrowski : Module initialization cleanup.
* Arnaldo C. Melo : Remove MOD_{INC,DEC}_USE_COUNT,
* the core infrastructure is doing that
* for all net proto families now (2.5.69+)
*
*
* Known differences from reference BSD that was tested:
*
* [TO FIX]
* ECONNREFUSED is not returned from one end of a connected() socket to the
* other the moment one end closes.
* fstat() doesn't return st_dev=0, and give the blksize as high water mark
* and a fake inode identifier (nor the BSD first socket fstat twice bug).
* [NOT TO FIX]
* accept() returns a path name even if the connecting socket has closed
* in the meantime (BSD loses the path and gives up).
* accept() returns 0 length path for an unbound connector. BSD returns 16
* and a null first byte in the path (but not for gethost/peername - BSD bug ??)
* socketpair(...SOCK_RAW..) doesn't panic the kernel.
* BSD af_unix apparently has connect forgetting to block properly.
* (need to check this with the POSIX spec in detail)
*
* Differences from 2.0.0-11-... (ANK)
* Bug fixes and improvements.
* - client shutdown killed server socket.
* - removed all useless cli/sti pairs.
*
* Semantic changes/extensions.
* - generic control message passing.
* - SCM_CREDENTIALS control message.
* - "Abstract" (not FS based) socket bindings.
* Abstract names are sequences of bytes (not zero terminated)
* started by 0, so that this name space does not intersect
* with BSD names.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/signal.h>
#include <linux/sched.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/stat.h>
#include <linux/dcache.h>
#include <linux/namei.h>
#include <linux/socket.h>
#include <linux/un.h>
#include <linux/fcntl.h>
#include <linux/termios.h>
#include <linux/sockios.h>
#include <linux/net.h>
#include <linux/in.h>
#include <linux/fs.h>
#include <linux/slab.h>
#include <asm/uaccess.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <net/net_namespace.h>
#include <net/sock.h>
#include <net/tcp_states.h>
#include <net/af_unix.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <net/scm.h>
#include <linux/init.h>
#include <linux/poll.h>
#include <linux/rtnetlink.h>
#include <linux/mount.h>
#include <net/checksum.h>
#include <linux/security.h>
#include <linux/freezer.h>
struct hlist_head unix_socket_table[2 * UNIX_HASH_SIZE];
EXPORT_SYMBOL_GPL(unix_socket_table);
DEFINE_SPINLOCK(unix_table_lock);
EXPORT_SYMBOL_GPL(unix_table_lock);
static atomic_long_t unix_nr_socks;
static struct hlist_head *unix_sockets_unbound(void *addr)
{
unsigned long hash = (unsigned long)addr;
hash ^= hash >> 16;
hash ^= hash >> 8;
hash %= UNIX_HASH_SIZE;
return &unix_socket_table[UNIX_HASH_SIZE + hash];
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| eric dumazet | eric dumazet | 46 | 97.87% | 1 | 50.00% |
| pre-git | pre-git | 1 | 2.13% | 1 | 50.00% |
| Total | 47 | 100.00% | 2 | 100.00% |
#define UNIX_ABSTRACT(sk) (unix_sk(sk)->addr->hash < UNIX_HASH_SIZE)
#ifdef CONFIG_SECURITY_NETWORK
static void unix_get_secdata(struct scm_cookie *scm, struct sk_buff *skb)
{
UNIXCB(skb).secid = scm->secid;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| catherine zhang | catherine zhang | 23 | 85.19% | 2 | 66.67% |
| stephen d. smalley | stephen d. smalley | 4 | 14.81% | 1 | 33.33% |
| Total | 27 | 100.00% | 3 | 100.00% |
static inline void unix_set_secdata(struct scm_cookie *scm, struct sk_buff *skb)
{
scm->secid = UNIXCB(skb).secid;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| catherine zhang | catherine zhang | 25 | 89.29% | 2 | 66.67% |
| stephen d. smalley | stephen d. smalley | 3 | 10.71% | 1 | 33.33% |
| Total | 28 | 100.00% | 3 | 100.00% |
static inline bool unix_secdata_eq(struct scm_cookie *scm, struct sk_buff *skb)
{
return (scm->secid == UNIXCB(skb).secid);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| stephen d. smalley | stephen d. smalley | 31 | 100.00% | 1 | 100.00% |
| Total | 31 | 100.00% | 1 | 100.00% |
#else
static inline void unix_get_secdata(struct scm_cookie *scm, struct sk_buff *skb)
{ }
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| catherine zhang | catherine zhang | 15 | 93.75% | 2 | 66.67% |
| andrew morton | andrew morton | 1 | 6.25% | 1 | 33.33% |
| Total | 16 | 100.00% | 3 | 100.00% |
static inline void unix_set_secdata(struct scm_cookie *scm, struct sk_buff *skb)
{ }
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| catherine zhang | catherine zhang | 16 | 100.00% | 1 | 100.00% |
| Total | 16 | 100.00% | 1 | 100.00% |
static inline bool unix_secdata_eq(struct scm_cookie *scm, struct sk_buff *skb)
{
return true;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| stephen d. smalley | stephen d. smalley | 20 | 100.00% | 1 | 100.00% |
| Total | 20 | 100.00% | 1 | 100.00% |
#endif /* CONFIG_SECURITY_NETWORK */
/*
* SMP locking strategy:
* hash table is protected with spinlock unix_table_lock
* each socket state is protected by separate spin lock.
*/
static inline unsigned int unix_hash_fold(__wsum n)
{
unsigned int hash = (__force unsigned int)csum_fold(n);
hash ^= hash>>8;
return hash&(UNIX_HASH_SIZE-1);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| pre-git | pre-git | 21 | 52.50% | 3 | 42.86% |
| al viro | al viro | 11 | 27.50% | 1 | 14.29% |
| eric dumazet | eric dumazet | 3 | 7.50% | 1 | 14.29% |
| anton blanchard | anton blanchard | 3 | 7.50% | 1 | 14.29% |
| linus torvalds | linus torvalds | 2 | 5.00% | 1 | 14.29% |
| Total | 40 | 100.00% | 7 | 100.00% |
#define unix_peer(sk) (unix_sk(sk)->peer)
static inline int unix_our_peer(struct sock *sk, struct sock *osk)
{
return unix_peer(osk) == sk;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| pre-git | pre-git | 19 | 76.00% | 2 | 50.00% |
| arnaldo carvalho de melo | arnaldo carvalho de melo | 4 | 16.00% | 1 | 25.00% |
| linus torvalds | linus torvalds | 2 | 8.00% | 1 | 25.00% |
| Total | 25 | 100.00% | 4 | 100.00% |
static inline int unix_may_send(struct sock *sk, struct sock *osk)
{
return unix_peer(osk) == NULL || unix_our_peer(sk, osk);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| pre-git | pre-git | 26 | 81.25% | 5 | 71.43% |
| arnaldo carvalho de melo | arnaldo carvalho de melo | 4 | 12.50% | 1 | 14.29% |
| linus torvalds | linus torvalds | 2 | 6.25% | 1 | 14.29% |
| Total | 32 | 100.00% | 7 | 100.00% |
static inline int unix_recvq_full(struct sock const *sk)
{
return skb_queue_len(&sk->sk_receive_queue) > sk->sk_max_ack_backlog;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| rainer weikusat | rainer weikusat | 26 | 100.00% | 1 | 100.00% |
| Total | 26 | 100.00% | 1 | 100.00% |
struct sock *unix_peer_get(struct sock *s)
{
struct sock *peer;
unix_state_lock(s);
peer = unix_peer(s);
if (peer)
sock_hold(peer);
unix_state_unlock(s);
return peer;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| pre-git | pre-git | 38 | 82.61% | 6 | 75.00% |
| arnaldo carvalho de melo | arnaldo carvalho de melo | 6 | 13.04% | 1 | 12.50% |
| david s. miller | david s. miller | 2 | 4.35% | 1 | 12.50% |
| Total | 46 | 100.00% | 8 | 100.00% |
EXPORT_SYMBOL_GPL(unix_peer_get);
static inline void unix_release_addr(struct unix_address *addr)
{
if (atomic_dec_and_test(&addr->refcnt))
kfree(addr);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| pre-git | pre-git | 25 | 92.59% | 2 | 50.00% |
| david s. miller | david s. miller | 1 | 3.70% | 1 | 25.00% |
| linus torvalds | linus torvalds | 1 | 3.70% | 1 | 25.00% |
| Total | 27 | 100.00% | 4 | 100.00% |
/*
* Check unix socket name:
* - should be not zero length.
* - if started by not zero, should be NULL terminated (FS object)
* - if started by zero, it is abstract name.
*/
static int unix_mkname(struct sockaddr_un *sunaddr, int len, unsigned int *hashp)
{
if (len <= sizeof(short) || len > sizeof(*sunaddr))
return -EINVAL;
if (!sunaddr || sunaddr->sun_family != AF_UNIX)
return -EINVAL;
if (sunaddr->sun_path[0]) {
/*
* This may look like an off by one error but it is a bit more
* subtle. 108 is the longest valid AF_UNIX path for a binding.
* sun_path[108] doesn't as such exist. However in kernel space
* we are guaranteed that it is a valid memory location in our
* kernel address buffer.
*/
((char *)sunaddr)[len] = 0;
len = strlen(sunaddr->sun_path)+1+sizeof(short);
return len;
}
*hashp = unix_hash_fold(csum_partial(sunaddr, len, 0));
return len;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| pre-git | pre-git | 115 | 98.29% | 2 | 50.00% |
| eric dumazet | eric dumazet | 1 | 0.85% | 1 | 25.00% |
| lucas de marchi | lucas de marchi | 1 | 0.85% | 1 | 25.00% |
| Total | 117 | 100.00% | 4 | 100.00% |
static void __unix_remove_socket(struct sock *sk)
{
sk_del_node_init(sk);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| pre-git | pre-git | 11 | 68.75% | 3 | 60.00% |
| arnaldo carvalho de melo | arnaldo carvalho de melo | 5 | 31.25% | 2 | 40.00% |
| Total | 16 | 100.00% | 5 | 100.00% |
static void __unix_insert_socket(struct hlist_head *list, struct sock *sk)
{
WARN_ON(!sk_unhashed(sk));
sk_add_node(sk, list);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| pre-git | pre-git | 19 | 59.38% | 3 | 42.86% |
| arnaldo carvalho de melo | arnaldo carvalho de melo | 10 | 31.25% | 2 | 28.57% |
| ilpo jarvinen | ilpo jarvinen | 2 | 6.25% | 1 | 14.29% |
| david s. miller | david s. miller | 1 | 3.12% | 1 | 14.29% |
| Total | 32 | 100.00% | 7 | 100.00% |
static inline void unix_remove_socket(struct sock *sk)
{
spin_lock(&unix_table_lock);
__unix_remove_socket(sk);
spin_unlock(&unix_table_lock);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| pre-git | pre-git | 24 | 82.76% | 2 | 40.00% |
| arnaldo carvalho de melo | arnaldo carvalho de melo | 2 | 6.90% | 1 | 20.00% |
| david s. miller | david s. miller | 2 | 6.90% | 1 | 20.00% |
| linus torvalds | linus torvalds | 1 | 3.45% | 1 | 20.00% |
| Total | 29 | 100.00% | 5 | 100.00% |
static inline void unix_insert_socket(struct hlist_head *list, struct sock *sk)
{
spin_lock(&unix_table_lock);
__unix_insert_socket(list, sk);
spin_unlock(&unix_table_lock);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| pre-git | pre-git | 29 | 80.56% | 2 | 33.33% |
| arnaldo carvalho de melo | arnaldo carvalho de melo | 4 | 11.11% | 2 | 33.33% |
| david s. miller | david s. miller | 2 | 5.56% | 1 | 16.67% |
| linus torvalds | linus torvalds | 1 | 2.78% | 1 | 16.67% |
| Total | 36 | 100.00% | 6 | 100.00% |
static struct sock *__unix_find_socket_byname(struct net *net,
struct sockaddr_un *sunname,
int len, int type, unsigned int hash)
{
struct sock *s;
sk_for_each(s, &unix_socket_table[hash ^ type]) {
struct unix_sock *u = unix_sk(s);
if (!net_eq(sock_net(s), net))
continue;
if (u->addr->len == len &&
!memcmp(u->addr->name, sunname, len))
goto found;
}
s = NULL;
found:
return s;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| pre-git | pre-git | 48 | 47.52% | 3 | 30.00% |
| arnaldo carvalho de melo | arnaldo carvalho de melo | 19 | 18.81% | 2 | 20.00% |
| david s. miller | david s. miller | 14 | 13.86% | 1 | 10.00% |
| denis v. lunev | denis v. lunev | 11 | 10.89% | 1 | 10.00% |
| hideaki yoshifuji | hideaki yoshifuji | 8 | 7.92% | 2 | 20.00% |
| eric dumazet | eric dumazet | 1 | 0.99% | 1 | 10.00% |
| Total | 101 | 100.00% | 10 | 100.00% |
static inline struct sock *unix_find_socket_byname(struct net *net,
struct sockaddr_un *sunname,
int len, int type,
unsigned int hash)
{
struct sock *s;
spin_lock(&unix_table_lock);
s = __unix_find_socket_byname(net, sunname, len, type, hash);
if (s)
sock_hold(s);
spin_unlock(&unix_table_lock);
return s;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| pre-git | pre-git | 58 | 79.45% | 3 | 37.50% |
| denis v. lunev | denis v. lunev | 7 | 9.59% | 1 | 12.50% |
| arnaldo carvalho de melo | arnaldo carvalho de melo | 4 | 5.48% | 1 | 12.50% |
| david s. miller | david s. miller | 2 | 2.74% | 1 | 12.50% |
| eric dumazet | eric dumazet | 1 | 1.37% | 1 | 12.50% |
| linus torvalds | linus torvalds | 1 | 1.37% | 1 | 12.50% |
| Total | 73 | 100.00% | 8 | 100.00% |
static struct sock *unix_find_socket_byinode(struct inode *i)
{
struct sock *s;
spin_lock(&unix_table_lock);
sk_for_each(s,
&unix_socket_table[i->i_ino & (UNIX_HASH_SIZE - 1)]) {
struct dentry *dentry = unix_sk(s)->path.dentry;
if (dentry && d_real_inode(dentry) == i) {
sock_hold(s);
goto found;
}
}
s = NULL;
found:
spin_unlock(&unix_table_lock);
return s;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| pre-git | pre-git | 54 | 64.29% | 4 | 36.36% |
| arnaldo carvalho de melo | arnaldo carvalho de melo | 20 | 23.81% | 2 | 18.18% |
| david s. miller | david s. miller | 5 | 5.95% | 2 | 18.18% |
| al viro | al viro | 2 | 2.38% | 1 | 9.09% |
| david howells | david howells | 2 | 2.38% | 1 | 9.09% |
| miklos szeredi | miklos szeredi | 1 | 1.19% | 1 | 9.09% |
| Total | 84 | 100.00% | 11 | 100.00% |
/* Support code for asymmetrically connected dgram sockets
*
* If a datagram socket is connected to a socket not itself connected
* to the first socket (eg, /dev/log), clients may only enqueue more
* messages if the present receive queue of the server socket is not
* "too large". This means there's a second writeability condition
* poll and sendmsg need to test. The dgram recv code will do a wake
* up on the peer_wait wait queue of a socket upon reception of a
* datagram which needs to be propagated to sleeping would-be writers
* since these might not have sent anything so far. This can't be
* accomplished via poll_wait because the lifetime of the server
* socket might be less than that of its clients if these break their
* association with it or if the server socket is closed while clients
* are still connected to it and there's no way to inform "a polling
* implementation" that it should let go of a certain wait queue
*
* In order to propagate a wake up, a wait_queue_t of the client
* socket is enqueued on the peer_wait queue of the server socket
* whose wake function does a wake_up on the ordinary client socket
* wait queue. This connection is established whenever a write (or
* poll for write) hit the flow control condition and broken when the
* association to the server socket is dissolved or after a wake up
* was relayed.
*/
static int unix_dgram_peer_wake_relay(wait_queue_t *q, unsigned mode, int flags,
void *key)
{
struct unix_sock *u;
wait_queue_head_t *u_sleep;
u = container_of(q, struct unix_sock, peer_wake);
__remove_wait_queue(&unix_sk(u->peer_wake.private)->peer_wait,
q);
u->peer_wake.private = NULL;
/* relaying can only happen while the wq still exists */
u_sleep = sk_sleep(&u->sk);
if (u_sleep)
wake_up_interruptible_poll(u_sleep, key);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| rainer weikusat | rainer weikusat | 91 | 100.00% | 1 | 100.00% |
| Total | 91 | 100.00% | 1 | 100.00% |
static int unix_dgram_peer_wake_connect(struct sock *sk, struct sock *other)
{
struct unix_sock *u, *u_other;
int rc;
u = unix_sk(sk);
u_other = unix_sk(other);
rc = 0;
spin_lock(&u_other->peer_wait.lock);
if (!u->peer_wake.private) {
u->peer_wake.private = other;
__add_wait_queue(&u_other->peer_wait, &u->peer_wake);
rc = 1;
}
spin_unlock(&u_other->peer_wait.lock);
return rc;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| rainer weikusat | rainer weikusat | 104 | 100.00% | 1 | 100.00% |
| Total | 104 | 100.00% | 1 | 100.00% |
static void unix_dgram_peer_wake_disconnect(struct sock *sk,
struct sock *other)
{
struct unix_sock *u, *u_other;
u = unix_sk(sk);
u_other = unix_sk(other);
spin_lock(&u_other->peer_wait.lock);
if (u->peer_wake.private == other) {
__remove_wait_queue(&u_other->peer_wait, &u->peer_wake);
u->peer_wake.private = NULL;
}
spin_unlock(&u_other->peer_wait.lock);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| rainer weikusat | rainer weikusat | 91 | 100.00% | 1 | 100.00% |
| Total | 91 | 100.00% | 1 | 100.00% |
static void unix_dgram_peer_wake_disconnect_wakeup(struct sock *sk,
struct sock *other)
{
unix_dgram_peer_wake_disconnect(sk, other);
wake_up_interruptible_poll(sk_sleep(sk),
POLLOUT |
POLLWRNORM |
POLLWRBAND);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| rainer weikusat | rainer weikusat | 37 | 100.00% | 1 | 100.00% |
| Total | 37 | 100.00% | 1 | 100.00% |
/* preconditions:
* - unix_peer(sk) == other
* - association is stable
*/
static int unix_dgram_peer_wake_me(struct sock *sk, struct sock *other)
{
int connected;
connected = unix_dgram_peer_wake_connect(sk, other);
if (unix_recvq_full(other))
return 1;
if (connected)
unix_dgram_peer_wake_disconnect(sk, other);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| rainer weikusat | rainer weikusat | 52 | 100.00% | 1 | 100.00% |
| Total | 52 | 100.00% | 1 | 100.00% |
static int unix_writable(const struct sock *sk)
{
return sk->sk_state != TCP_LISTEN &&
(atomic_read(&sk->sk_wmem_alloc) << 2) <= sk->sk_sndbuf;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| pre-git | pre-git | 26 | 74.29% | 3 | 60.00% |
| eric dumazet | eric dumazet | 7 | 20.00% | 1 | 20.00% |
| arnaldo carvalho de melo | arnaldo carvalho de melo | 2 | 5.71% | 1 | 20.00% |
| Total | 35 | 100.00% | 5 | 100.00% |
static void unix_write_space(struct sock *sk)
{
struct socket_wq *wq;
rcu_read_lock();
if (unix_writable(sk)) {
wq = rcu_dereference(sk->sk_wq);
if (skwq_has_sleeper(wq))
wake_up_interruptible_sync_poll(&wq->wait,
POLLOUT | POLLWRNORM | POLLWRBAND);
sk_wake_async(sk, SOCK_WAKE_SPACE, POLL_OUT);
}
rcu_read_unlock();
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| pre-git | pre-git | 38 | 54.29% | 7 | 63.64% |
| eric dumazet | eric dumazet | 30 | 42.86% | 2 | 18.18% |
| pavel emelianov | pavel emelianov | 1 | 1.43% | 1 | 9.09% |
| herbert xu | herbert xu | 1 | 1.43% | 1 | 9.09% |
| Total | 70 | 100.00% | 11 | 100.00% |
/* When dgram socket disconnects (or changes its peer), we clear its receive
* queue of packets arrived from previous peer. First, it allows to do
* flow control based only on wmem_alloc; second, sk connected to peer
* may receive messages only from that peer. */
static void unix_dgram_disconnected(struct sock *sk, struct sock *other)
{
if (!skb_queue_empty(&sk->sk_receive_queue)) {
skb_queue_purge(&sk->sk_receive_queue);
wake_up_interruptible_all(&unix_sk(sk)->peer_wait);
/* If one link of bidirectional dgram pipe is disconnected,
* we signal error. Messages are lost. Do not make this,
* when peer was not connected to us.
*/
if (!sock_flag(other, SOCK_DEAD) && unix_peer(other) == sk) {
other->sk_err = ECONNRESET;
other->sk_error_report(other);
}
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| pre-git | pre-git | 67 | 82.72% | 1 | 16.67% |
| arnaldo carvalho de melo | arnaldo carvalho de melo | 7 | 8.64% | 2 | 33.33% |
| david s. miller | david s. miller | 5 | 6.17% | 2 | 33.33% |
| james morris | james morris | 2 | 2.47% | 1 | 16.67% |
| Total | 81 | 100.00% | 6 | 100.00% |
static void unix_sock_destructor(struct sock *sk)
{
struct unix_sock *u = unix_sk(sk);
skb_queue_purge(&sk->sk_receive_queue);
WARN_ON(atomic_read(&sk->sk_wmem_alloc));
WARN_ON(!sk_unhashed(sk));
WARN_ON(sk->sk_socket);
if (!sock_flag(sk, SOCK_DEAD)) {
pr_info("Attempt to release alive unix socket: %p\n", sk);
return;
}
if (u->addr)
unix_release_addr(u->addr);
atomic_long_dec(&unix_nr_socks);
local_bh_disable();
sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1);
local_bh_enable();
#ifdef UNIX_REFCNT_DEBUG
pr_debug("UNIX %p is destroyed, %ld are still alive.\n", sk,
atomic_long_read(&unix_nr_socks));
#endif
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| pre-git | pre-git | 79 | 58.96% | 3 | 23.08% |
| david s. miller | david s. miller | 18 | 13.43% | 2 | 15.38% |
| eric dumazet | eric dumazet | 18 | 13.43% | 2 | 15.38% |
| arnaldo carvalho de melo | arnaldo carvalho de melo | 10 | 7.46% | 3 | 23.08% |
| ilpo jarvinen | ilpo jarvinen | 4 | 2.99% | 1 | 7.69% |
| james morris | james morris | 3 | 2.24% | 1 | 7.69% |
| wang weidong | wang weidong | 2 | 1.49% | 1 | 7.69% |
| Total | 134 | 100.00% | 13 | 100.00% |
static void unix_release_sock(struct sock *sk, int embrion)
{
struct unix_sock *u = unix_sk(sk);
struct path path;
struct sock *skpair;
struct sk_buff *skb;
int state;
unix_remove_socket(sk);
/* Clear state */
unix_state_lock(sk);
sock_orphan(sk);
sk->sk_shutdown = SHUTDOWN_MASK;
path = u->path;
u->path.dentry = NULL;
u->path.mnt = NULL;
state = sk->sk_state;
sk->sk_state = TCP_CLOSE;
unix_state_unlock(sk);
wake_up_interruptible_all(&u->peer_wait);
skpair = unix_peer(sk);
if (skpair != NULL) {
if (sk->sk_type == SOCK_STREAM || sk->sk_type == SOCK_SEQPACKET) {
unix_state_lock(skpair);
/* No more writes */
skpair->sk_shutdown = SHUTDOWN_MASK;
if (!skb_queue_empty(&sk->sk_receive_queue) || embrion)
skpair->sk_err = ECONNRESET;
unix_state_unlock(skpair);
skpair->sk_state_change(skpair);
sk_wake_async(skpair, SOCK_WAKE_WAITD, POLL_HUP);
}
unix_dgram_peer_wake_disconnect(sk, skpair);
sock_put(skpair); /* It may now die */
unix_peer(sk) = NULL;
}
/* Try to flush out this socket. Throw out buffers at least */
while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
if (state == TCP_LISTEN)
unix_release_sock(skb->sk, 1);
/* passed fds are erased in the kfree_skb hook */
UNIXCB(skb).consumed = skb->len;
kfree_skb(skb);
}
if (path.dentry)
path_put(&path);
sock_put(sk);
/* ---- Socket is dead now and most probably destroyed ---- */
/*
* Fixme: BSD difference: In BSD all sockets connected to us get
* ECONNRESET and we die on the spot. In Linux we behave
* like files and pipes do and wait for the last
* dereference.
*
* Can't we simply set sock->err?
*
* What the above comment does talk about? --ANK(980817)
*/
if (unix_tot_inflight)
unix_gc(); /* Garbage collect fds */
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| pre-git | pre-git | 219 | 75.26% | 11 | 50.00% |
| david s. miller | david s. miller | 18 | 6.19% | 2 | 9.09% |
| arnaldo carvalho de melo | arnaldo carvalho de melo | 14 | 4.81% | 2 | 9.09% |
| al viro | al viro | 13 | 4.47% | 1 | 4.55% |
| hannes frederic sowa | hannes frederic sowa | 11 | 3.78% | 1 | 4.55% |
| rainer weikusat | rainer weikusat | 7 | 2.41% | 1 | 4.55% |
| steven dake | steven dake | 6 | 2.06% | 1 | 4.55% |
| paul moore | paul moore | 1 | 0.34% | 1 | 4.55% |
| pavel emelianov | pavel emelianov | 1 | 0.34% | 1 | 4.55% |
| alan cox | alan cox | 1 | 0.34% | 1 | 4.55% |
| Total | 291 | 100.00% | 22 | 100.00% |
static void init_peercred(struct sock *sk)
{
put_pid(sk->sk_peer_pid);
if (sk->sk_peer_cred)
put_cred(sk->sk_peer_cred);
sk->sk_peer_pid = get_pid(task_tgid(current));
sk->sk_peer_cred = get_current_cred();
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| eric w. biederman | eric w. biederman | 50 | 100.00% | 1 | 100.00% |
| Total | 50 | 100.00% | 1 | 100.00% |
static void copy_peercred(struct sock *sk, struct sock *peersk)
{
put_pid(sk->sk_peer_pid);
if (sk->sk_peer_cred)
put_cred(sk->sk_peer_cred);
sk->sk_peer_pid = get_pid(peersk->sk_peer_pid);
sk->sk_peer_cred = get_cred(peersk->sk_peer_cred);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| eric w. biederman | eric w. biederman | 58 | 100.00% | 1 | 100.00% |
| Total | 58 | 100.00% | 1 | 100.00% |
static int unix_listen(struct socket *sock, int backlog)
{
int err;
struct sock *sk = sock->sk;
struct unix_sock *u = unix_sk(sk);
struct pid *old_pid = NULL;
err = -EOPNOTSUPP;
if (sock->type != SOCK_STREAM && sock->type != SOCK_SEQPACKET)
goto out; /* Only stream/seqpacket sockets accept */
err = -EINVAL;
if (!u->addr)
goto out; /* No listens on an unbound socket */
unix_state_lock(sk);
if (sk->sk_state != TCP_CLOSE && sk->sk_state != TCP_LISTEN)
goto out_unlock;
if (backlog > sk->sk_max_ack_backlog)
wake_up_interruptible_all(&u->peer_wait);
sk->sk_max_ack_backlog = backlog;
sk->sk_state = TCP_LISTEN;
/* set credentials so connect can copy them */
init_peercred(sk);
err = 0;
out_unlock:
unix_state_unlock(sk);
put_pid(old_pid);
out:
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| pre-git | pre-git | 118 | 74.21% | 7 | 50.00% |
| david s. miller | david s. miller | 14 | 8.81% | 2 | 14.29% |
| eric w. biederman | eric w. biederman | 13 | 8.18% | 1 | 7.14% |
| steven dake | steven dake | 7 | 4.40% | 1 | 7.14% |
| arnaldo carvalho de melo | arnaldo carvalho de melo | 5 | 3.14% | 1 | 7.14% |
| david howells | david howells | 1 | 0.63% | 1 | 7.14% |
| pavel emelianov | pavel emelianov | 1 | 0.63% | 1 | 7.14% |
| Total | 159 | 100.00% | 14 | 100.00% |
static int unix_release(struct socket *);
static int unix_bind(struct socket *, struct sockaddr *, int);
static int unix_stream_connect(struct socket *, struct sockaddr *,
int addr_len, int flags);
static int unix_socketpair(struct socket *, struct socket *);
static int unix_accept(struct socket *, struct socket *, int);
static int unix_getname(struct socket *, struct sockaddr *, int *, int);
static unsigned int unix_poll(struct file *, struct socket *, poll_table *);
static unsigned int unix_dgram_poll(struct file *, struct socket *,
poll_table *);
static int unix_ioctl(struct socket *, unsigned int, unsigned long);
static int unix_shutdown(struct socket *, int);
static int unix_stream_sendmsg(struct socket *, struct msghdr *, size_t);
static int unix_stream_recvmsg(struct socket *, struct msghdr *, size_t, int);
static ssize_t unix_stream_sendpage(struct socket *, struct page *, int offset,
size_t size, int flags);
static ssize_t unix_stream_splice_read(struct socket *, loff_t *ppos,
struct pipe_inode_info *, size_t size,
unsigned int flags);
static int unix_dgram_sendmsg(struct socket *, struct msghdr *, size_t);
static int unix_dgram_recvmsg(struct socket *, struct msghdr *, size_t, int);
static int unix_dgram_connect(struct socket *, struct sockaddr *,
int, int);
static int unix_seqpacket_sendmsg(struct socket *, struct msghdr *, size_t);
static int unix_seqpacket_recvmsg(struct socket *, struct msghdr *, size_t,
int);
static int unix_set_peek_off(struct sock *sk, int val)
{
struct unix_sock *u = unix_sk(sk);
if (mutex_lock_interruptible(&u->readlock))
return -EINTR;
sk->sk_peek_off = val;
mutex_unlock(&u->readlock);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| pavel emelianov | pavel emelianov | 43 | 78.18% | 1 | 50.00% |
| sasha levin | sasha levin | 12 | 21.82% | 1 | 50.00% |
| Total | 55 | 100.00% | 2 | 100.00% |
static const struct proto_ops unix_stream_ops = {
.family = PF_UNIX,
.owner = THIS_MODULE,
.release = unix_release,
.bind = unix_bind,
.connect = unix_stream_connect,
.socketpair = unix_socketpair,
.accept = unix_accept,
.getname = unix_getname,
.poll = unix_poll,
.ioctl = unix_ioctl,
.listen = unix_listen,
.shutdown = unix_shutdown,
.setsockopt = sock_no_setsockopt,
.getsockopt = sock_no_getsockopt,
.sendmsg = unix_stream_sendmsg,
.recvmsg = unix_stream_recvmsg,
.mmap = sock_no_mmap,
.sendpage = unix_stream_sendpage,
.splice_read = unix_stream_splice_read,
.set_peek_off = unix_set_peek_off,
};
static const struct proto_ops unix_dgram_ops = {
.family = PF_UNIX,
.owner = THIS_MODULE,
.release = unix_release,
.bind = unix_bind,
.connect = unix_dgram_connect,
.socketpair = unix_socketpair,
.accept = sock_no_accept,
.getname = unix_getname,
.poll = unix_dgram_poll,
.ioctl = unix_ioctl,
.listen = sock_no_listen,
.shutdown = unix_shutdown,
.setsockopt = sock_no_setsockopt,
.getsockopt = sock_no_getsockopt,
.sendmsg = unix_dgram_sendmsg,
.recvmsg = unix_dgram_recvmsg,
.mmap = sock_no_mmap,
.sendpage = sock_no_sendpage,
.set_peek_off = unix_set_peek_off,
};
static const struct proto_ops unix_seqpacket_ops = {
.family = PF_UNIX,
.owner = THIS_MODULE,
.release = unix_release,
.bind = unix_bind,
.connect = unix_stream_connect,
.socketpair = unix_socketpair,
.accept = unix_accept,
.getname = unix_getname,
.poll = unix_dgram_poll,
.ioctl = unix_ioctl,
.listen = unix_listen,
.shutdown = unix_shutdown,
.setsockopt = sock_no_setsockopt,
.getsockopt = sock_no_getsockopt,
.sendmsg = unix_seqpacket_sendmsg,
.recvmsg = unix_seqpacket_recvmsg,
.mmap = sock_no_mmap,
.sendpage = sock_no_sendpage,
.set_peek_off = unix_set_peek_off,
};
static struct proto unix_proto = {
.name = "UNIX",
.owner = THIS_MODULE,
.obj_size = sizeof(struct unix_sock),
};
/*
* AF_UNIX sockets do not interact with hardware, hence they
* dont trigger interrupts - so it's safe for them to have
* bh-unsafe locking for their sk_receive_queue.lock. Split off
* this special lock-class by reinitializing the spinlock key:
*/
static struct lock_class_key af_unix_sk_receive_queue_lock_key;
static struct sock *unix_create1(struct net *net, struct socket *sock, int kern)
{
struct sock *sk = NULL;
struct unix_sock *u;
atomic_long_inc(&unix_nr_socks);
if (atomic_long_read(&unix_nr_socks) > 2 * get_max_files())
goto out;
sk = sk_alloc(net, PF_UNIX, GFP_KERNEL, &unix_proto, kern);
if (!sk)
goto out;
sock_init_data(sock, sk);
lockdep_set_class(&sk->sk_receive_queue.lock,
&af_unix_sk_receive_queue_lock_key);
sk->sk_write_space = unix_write_space;
sk->sk_max_ack_backlog = net->unx.sysctl_max_dgram_qlen;
sk->sk_destruct = unix_sock_destructor;
u = unix_sk(sk);
u->path.dentry = NULL;
u->path.mnt = NULL;
spin_lock_init(&u->lock);
atomic_long_set(&u->inflight, 0);
INIT_LIST_HEAD(&u->link);
mutex_init(&u->readlock); /* single task reading lock */
init_waitqueue_head(&u->peer_wait);
init_waitqueue_func_entry(&u->peer_wake, unix_dgram_peer_wake_relay);
unix_insert_socket(unix_sockets_unbound(sk), sk);
out:
if (sk == NULL)
atomic_long_dec(&unix_nr_socks);
else {
local_bh_disable();
sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
local_bh_enable();
}
return sk;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| david s. miller | david s. miller | 141 | 57.09% | 1 | 5.26% |
| eric dumazet | eric dumazet | 29 | 11.74% | 4 | 21.05% |
| pavel emelianov | pavel emelianov | 19 | 7.69% | 2 | 10.53% |
| ingo molnar | ingo molnar | 15 | 6.07% | 2 | 10.53% |
| eric w. biederman | eric w. biederman | 12 | 4.86% | 2 | 10.53% |
| rainer weikusat | rainer weikusat | 10 | 4.05% | 1 | 5.26% |
| miklos szeredi | miklos szeredi | 8 | 3.24% | 1 | 5.26% |
| al viro | al viro | 5 | 2.02% | 2 | 10.53% |
| denis v. lunev | denis v. lunev | 3 | 1.21% | 1 | 5.26% |
| dipankar sarma | dipankar sarma | 2 | 0.81% | 1 | 5.26% |
| arnaldo carvalho de melo | arnaldo carvalho de melo | 2 | 0.81% | 1 | 5.26% |
| benjamin lahaise | benjamin lahaise | 1 | 0.40% | 1 | 5.26% |
| Total | 247 | 100.00% | 19 | 100.00% |
static int unix_create(struct net *net, struct socket *sock, int protocol,
int kern)
{
if (protocol && protocol != PF_UNIX)
return -EPROTONOSUPPORT;
sock->state = SS_UNCONNECTED;
switch (sock->type) {
case SOCK_STREAM:
sock->ops = &unix_stream_ops;
break;
/*
* Believe it or not BSD has AF_UNIX, SOCK_RAW though
* nothing uses it.
*/
case SOCK_RAW:
sock->type = SOCK_DGRAM;
case SOCK_DGRAM:
sock->ops = &unix_dgram_ops;
break;
case SOCK_SEQPACKET:
sock->ops = &unix_seqpacket_ops;
break;
default:
return -ESOCKTNOSUPPORT;
}
return unix_create1(net, sock, kern) ? 0 : -ENOMEM;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| david s. miller | david s. miller | 99 | 89.19% | 1 | 25.00% |
| eric w. biederman | eric w. biederman | 9 | 8.11% | 2 | 50.00% |
| eric paris | eric paris | 3 | 2.70% | 1 | 25.00% |
| Total | 111 | 100.00% | 4 | 100.00% |
static int unix_release(struct socket *sock)
{
struct sock *sk = sock->sk;
if (!sk)
return 0;
unix_release_sock(sk, 0);
sock->sk = NULL;
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| david s. miller | david s. miller | 37 | 84.09% | 1 | 50.00% |
| paul moore | paul moore | 7 | 15.91% | 1 | 50.00% |
| Total | 44 | 100.00% | 2 | 100.00% |
static int unix_autobind(struct socket *sock)
{
struct sock *sk = sock->sk;
struct net *net = sock_net(sk);
struct unix_sock *u = unix_sk(sk);
static u32 ordernum = 1;
struct unix_address *addr;
int err;
unsigned int retries = 0;
err = mutex_lock_interruptible(&u->readlock);
if (err)
return err;
err = 0;
if (u->addr)
goto out;
err = -ENOMEM;
addr = kzalloc(sizeof(*addr) + sizeof(short) + 16, GFP_KERNEL);
if (!addr)
goto out;
addr->name->sun_family = AF_UNIX;
atomic_set(&addr->refcnt, 1);
retry:
addr->len = sprintf(addr->name->sun_path+1, "%05x", ordernum) + 1 + sizeof(short);
addr->hash = unix_hash_fold(csum_partial(addr->name, addr->len, 0));
spin_lock(&unix_table_lock);
ordernum = (ordernum+1)&0xFFFFF;
if (__unix_find_socket_byname(net, addr->name, addr->len, sock->type,
addr->hash)) {
spin_unlock(&unix_table_lock);
/*
* __unix_find_socket_byname() may take long time if many names
* are already in use.
*/
cond_resched();
/* Give up if all names seems to be in use. */
if (retries++ == 0xFFFFF) {
err = -ENOSPC;
kfree(addr);
goto out;
}
goto retry;
}
addr->hash ^= sk->sk_type;
__unix_remove_socket(sk);
u->addr = addr;
__unix_insert_socket(&unix_socket_table[addr->hash], sk);
spin_unlock(&unix_table_lock);
err = 0;
out: mutex_unlock(&u->readlock);
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| pre-git | pre-git | 198 | 61.68% | 4 | 28.57% |
| david s. miller | david s. miller | 67 | 20.87% | 3 | 21.43% |
| tetsuo handa | tetsuo handa | 29 | 9.03% | 1 | 7.14% |
| sasha levin | sasha levin | 10 | 3.12% | 1 | 7.14% |
| denis v. lunev | denis v. lunev | 9 | 2.80% | 1 | 7.14% |
| ingo molnar | ingo molnar | 3 | 0.93% | 1 | 7.14% |
| hideaki yoshifuji | hideaki yoshifuji | 3 | 0.93% | 1 | 7.14% |
| panagiotis issaris* | panagiotis issaris* | 1 | 0.31% | 1 | 7.14% |
| arnaldo carvalho de melo | arnaldo carvalho de melo | 1 | 0.31% | 1 | 7.14% |
| Total | 321 | 100.00% | 14 | 100.00% |
static struct sock *unix_find_other(struct net *net,
struct sockaddr_un *sunname, int len,
int type, unsigned int hash, int *error)
{
struct sock *u;
struct path path;
int err = 0;
if (sunname->sun_path[0]) {
struct inode *inode;
err = kern_path(sunname->sun_path, LOOKUP_FOLLOW, &path);
if (err)
goto fail;
inode = d_real_inode(path.dentry);
err = inode_permission(inode, MAY_WRITE);
if (err)
goto put_fail;
err = -ECONNREFUSED;
if (!S_ISSOCK(inode->i_mode))
goto put_fail;
u = unix_find_socket_byinode(inode);
if (!u)
goto put_fail;
if (u->sk_type == type)
touch_atime(&path);
path_put(&path);
err = -EPROTOTYPE;
if (u->sk_type != type) {
sock_put(u);
goto fail;
}
} else {
err = -ECONNREFUSED;
u = unix_find_socket_byname(net, sunname, len, type, hash);
if (u) {
struct dentry *dentry;
dentry = unix_sk(u)->path.dentry;
if (dentry)
touch_atime(&unix_sk(u)->path);
} else
goto fail;
}
return u;
put_fail:
path_put(&path);
fail:
*error = err;
return NULL;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| pre-git | pre-git | 180 | 66.91% | 8 | 34.78% |
| solar designer | solar designer | 32 | 11.90% | 1 | 4.35% |
| al viro | al viro | 32 | 11.90% | 5 | 21.74% |
| denis v. lunev | denis v. lunev | 7 | 2.60% | 1 | 4.35% |
| arnaldo carvalho de melo | arnaldo carvalho de melo | 6 | 2.23% | 2 | 8.70% |
| jan blunck | jan blunck | 5 | 1.86% | 2 | 8.70% |
| david s. miller | david s. miller | 3 | 1.12% | 1 | 4.35% |
| david howells | david howells | 2 | 0.74% | 1 | 4.35% |
| eric dumazet | eric dumazet | 1 | 0.37% | 1 | 4.35% |
| miklos szeredi | miklos szeredi | 1 | 0.37% | 1 | 4.35% |
| Total | 269 | 100.00% | 23 | 100.00% |
static int unix_mknod(struct dentry *dentry, const struct path *path, umode_t mode,
struct path *res)
{
int err;
err = security_path_mknod(path, dentry, mode, 0);
if (!err) {
err = vfs_mknod(d_inode(path->dentry), dentry, mode, 0);
if (!err) {
res->mnt = mntget(path->mnt);
res->dentry = dget(dentry);
}
}
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| al viro | al viro | 83 | 86.46% | 2 | 50.00% |
| rainer weikusat | rainer weikusat | 10 | 10.42% | 1 | 25.00% |
| david howells | david howells | 3 | 3.12% | 1 | 25.00% |
| Total | 96 | 100.00% | 4 | 100.00% |
static int unix_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
{
struct sock *sk = sock->sk;
struct net *net = sock_net(sk);
struct unix_sock *u = unix_sk(sk);
struct sockaddr_un *sunaddr = (struct sockaddr_un *)uaddr;
char *sun_path = sunaddr->sun_path;
int err, name_err;
unsigned int hash;
struct unix_address *addr;
struct hlist_head *list;
struct path path;
struct dentry *dentry;
err = -EINVAL;
if (sunaddr->sun_family != AF_UNIX)
goto out;
if (addr_len == sizeof(short)) {
err = unix_autobind(sock);
goto out;
}
err = unix_mkname(sunaddr, addr_len, &hash);
if (err < 0)
goto out;
addr_len = err;
name_err = 0;
dentry = NULL;
if (sun_path[0]) {
/* Get the parent directory, calculate the hash for last
* component.
*/
dentry = kern_path_create(AT_FDCWD, sun_path, &path, 0);
if (IS_ERR(dentry)) {
/* delay report until after 'already bound' check */
name_err = PTR_ERR(dentry);
dentry = NULL;
}
}
err = mutex_lock_interruptible(&u->readlock);
if (err)
goto out_path;
err = -EINVAL;
if (u->addr)
goto out_up;
if (name_err) {
err = name_err == -EEXIST ? -EADDRINUSE : name_err;
goto out_up;
}
err = -ENOMEM;
addr = kmalloc(sizeof(*addr)+addr_len, GFP_KERNEL);
if (!addr)
goto out_up;
memcpy(addr->name, sunaddr, addr_len);
addr->len = addr_len;
addr->hash = hash ^ sk->sk_type;
atomic_set(&addr->refcnt, 1);
if (dentry) {
struct path u_path;
umode_t mode = S_IFSOCK |
(SOCK_INODE(sock)->i_mode & ~current_umask());
err = unix_mknod(dentry, &path, mode, &u_path);
if (err) {
if (err == -EEXIST)
err = -EADDRINUSE;
unix_release_addr(addr);
goto out_up;
}
addr->hash = UNIX_HASH_SIZE;
hash = d_real_inode(dentry)->i_ino & (UNIX_HASH_SIZE - 1);
spin_lock(&unix_table_lock);
u->path = u_path;
list = &unix_socket_table[hash];
} else {
spin_lock(&unix_table_lock);
err = -EADDRINUSE;
if (__unix_find_socket_byname(net, sunaddr, addr_len,
sk->sk_type, hash)) {
unix_release_addr(addr);
goto out_unlock;
}
list = &unix_socket_table[addr->hash];
}
err = 0;
__unix_remove_socket(sk);
u->addr = addr;
__unix_insert_socket(list, sk);
out_unlock:
spin_unlock(&unix_table_lock);
out_up:
mutex_unlock(&u->readlock);
out_path:
if (dentry)
done_path_create(&path, dentry);
out:
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| pre-git | pre-git | 303 | 55.29% | 9 | 30.00% |
| rainer weikusat | rainer weikusat | 108 | 19.71% | 1 | 3.33% |
| al viro | al viro | 59 | 10.77% | 5 | 16.67% |
| david s. miller | david s. miller | 16 | 2.92% | 2 | 6.67% |
| linus torvalds | linus torvalds | 10 | 1.82% | 1 | 3.33% |
| dave hansen | dave hansen | 10 | 1.82% | 1 | 3.33% |
| sasha levin | sasha levin | 9 | 1.64% | 1 | 3.33% |
| denis v. lunev | denis v. lunev | 9 | 1.64% | 1 | 3.33% |
| kentaro takeda | kentaro takeda | 9 | 1.64% | 1 | 3.33% |
| arnaldo carvalho de melo | arnaldo carvalho de melo | 4 | 0.73% | 2 | 6.67% |
| ingo molnar | ingo molnar | 3 | 0.55% | 1 | 3.33% |
| hideaki yoshifuji | hideaki yoshifuji | 3 | 0.55% | 1 | 3.33% |
| david howells | david howells | 2 | 0.36% | 1 | 3.33% |
| jan blunck | jan blunck | 1 | 0.18% | 1 | 3.33% |
| miklos szeredi | miklos szeredi | 1 | 0.18% | 1 | 3.33% |
| eric dumazet | eric dumazet | 1 | 0.18% | 1 | 3.33% |
| Total | 548 | 100.00% | 30 | 100.00% |
static void unix_state_double_lock(struct sock *sk1, struct sock *sk2)
{
if (unlikely(sk1 == sk2) || !sk2) {
unix_state_lock(sk1);
return;
}
if (sk1 < sk2) {
unix_state_lock(sk1);
unix_state_lock_nested(sk2);
} else {
unix_state_lock(sk2);
unix_state_lock_nested(sk1);
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| david s. miller | david s. miller | 67 | 100.00% | 1 | 100.00% |
| Total | 67 | 100.00% | 1 | 100.00% |
static void unix_state_double_unlock(struct sock *sk1, struct sock *sk2)
{
if (unlikely(sk1 == sk2) || !sk2) {
unix_state_unlock(sk1);
return;
}
unix_state_unlock(sk1);
unix_state_unlock(sk2);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| david s. miller | david s. miller | 46 | 100.00% | 1 | 100.00% |
| Total | 46 | 100.00% | 1 | 100.00% |
static int unix_dgram_connect(struct socket *sock, struct sockaddr *addr,
int alen, int flags)
{
struct sock *sk = sock->sk;
struct net *net = sock_net(sk);
struct sockaddr_un *sunaddr = (struct sockaddr_un *)addr;
struct sock *other;
unsigned int hash;
int err;
if (addr->sa_family != AF_UNSPEC) {
err = unix_mkname(sunaddr, alen, &hash);
if (err < 0)
goto out;
alen = err;
if (test_bit(SOCK_PASSCRED, &sock->flags) &&
!unix_sk(sk)->addr && (err = unix_autobind(sock)) != 0)
goto out;
restart:
other = unix_find_other(net, sunaddr, alen, sock->type, hash, &err);
if (!other)
goto out;
unix_state_double_lock(sk, other);
/* Apparently VFS overslept socket death. Retry. */
if (sock_flag(other, SOCK_DEAD)) {
unix_state_double_unlock(sk, other);
sock_put(other);
goto restart;
}
err = -EPERM;
if (!unix_may_send(sk, other))
goto out_unlock;
err = security_unix_may_send(sk->sk_socket, other->sk_socket);
if (err)
goto out_unlock;
} else {
/*
* 1003.1g breaking connected state with AF_UNSPEC
*/
other = NULL;
unix_state_double_lock(sk, other);
}
/*
* If it was connected, reconnect.
*/
if (unix_peer(sk)) {
struct sock *old_peer = unix_peer(sk);
unix_peer(sk) = other;
unix_dgram_peer_wake_disconnect_wakeup(sk, old_peer);
unix_state_double_unlock(sk, other);
if (other != old_peer)
unix_dgram_disconnected(sk, old_peer);
sock_put(old_peer);
} else {
unix_peer(sk) = other;
unix_state_double_unlock(sk, other);
}
return 0;
out_unlock:
unix_state_double_unlock(sk, other);
sock_put(other);
out:
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| pre-git | pre-git | 255 | 73.07% | 6 | 40.00% |
| david s. miller | david s. miller | 47 | 13.47% | 2 | 13.33% |
| james morris | james morris | 18 | 5.16% | 1 | 6.67% |
| denis v. lunev | denis v. lunev | 9 | 2.58% | 1 | 6.67% |
| herbert poetzl | herbert poetzl | 7 | 2.01% | 1 | 6.67% |
| rainer weikusat | rainer weikusat | 7 | 2.01% | 1 | 6.67% |
| hideaki yoshifuji | hideaki yoshifuji | 3 | 0.86% | 1 | 6.67% |
| arnaldo carvalho de melo | arnaldo carvalho de melo | 2 | 0.57% | 1 | 6.67% |
| eric dumazet | eric dumazet | 1 | 0.29% | 1 | 6.67% |
| Total | 349 | 100.00% | 15 | 100.00% |
static long unix_wait_for_peer(struct sock *other, long timeo)
{
struct unix_sock *u = unix_sk(other);
int sched;
DEFINE_WAIT(wait);
prepare_to_wait_exclusive(&u->peer_wait, &wait, TASK_INTERRUPTIBLE);
sched = !sock_flag(other, SOCK_DEAD) &&
!(other->sk_shutdown & RCV_SHUTDOWN) &&
unix_recvq_full(other);
unix_state_unlock(other);
if (sched)
timeo = schedule_timeout(timeo);
finish_wait(&u->peer_wait, &wait);
return timeo;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| pre-git | pre-git | 72 | 72.73% | 5 | 38.46% |
| david s. miller | david s. miller | 13 | 13.13% | 2 | 15.38% |
| arnaldo carvalho de melo | arnaldo carvalho de melo | 6 | 6.06% | 3 | 23.08% |
| andrew morton | andrew morton | 5 | 5.05% | 1 | 7.69% |
| james morris | james morris | 2 | 2.02% | 1 | 7.69% |
| rainer weikusat | rainer weikusat | 1 | 1.01% | 1 | 7.69% |
| Total | 99 | 100.00% | 13 | 100.00% |
static int unix_stream_connect(struct socket *sock, struct sockaddr *uaddr,
int addr_len, int flags)
{
struct sockaddr_un *sunaddr = (struct sockaddr_un *)uaddr;
struct sock *sk = sock->sk;
struct net *net = sock_net(sk);
struct unix_sock *u = unix_sk(sk), *newu, *otheru;
struct sock *newsk = NULL;
struct sock *other = NULL;
struct sk_buff *skb = NULL;
unsigned int hash;
int st;
int err;
long timeo;
err = unix_mkname(sunaddr, addr_len, &hash);
if (err < 0)
goto out;
addr_len = err;
if (test_bit(SOCK_PASSCRED, &sock->flags) && !u->addr &&
(err = unix_autobind(sock)) != 0)
goto out;
timeo = sock_sndtimeo(sk, flags & O_NONBLOCK);
/* First of all allocate resources.
If we will make it after state is locked,
we will have to recheck all again in any case.
*/
err = -ENOMEM;
/* create new sock for complete connection */
newsk = unix_create1(sock_net(sk), NULL, 0);
if (newsk == NULL)
goto out;
/* Allocate skb for sending to listening sock */
skb = sock_wmalloc(newsk, 1, 0, GFP_KERNEL);
if (skb == NULL)
goto out;
restart:
/* Find listening sock. */
other = unix_find_other(net, sunaddr, addr_len, sk->sk_type, hash, &err);
if (!other)
goto out;
/* Latch state of peer */
unix_state_lock(other);
/* Apparently VFS overslept socket death. Retry. */
if (sock_flag(other, SOCK_DEAD)) {
unix_state_unlock(other);
sock_put(other);
goto restart;
}
err = -ECONNREFUSED;
if (other->sk_state != TCP_LISTEN)
goto out_unlock;
if (other->sk_shutdown & RCV_SHUTDOWN)
goto out_unlock;
if (unix_recvq_full(other)) {
err = -EAGAIN;
if (!timeo)
goto out_unlock;
timeo = unix_wait_for_peer(other, timeo);
err = sock_intr_errno(timeo);
if (signal_pending(current))
goto out;
sock_put(other);
goto restart;
}
/* Latch our state.
It is tricky place. We need to grab our state lock and cannot
drop lock on peer. It is dangerous because deadlock is
possible. Connect to self case and simultaneous
attempt to connect are eliminated by checking socket
state. other is TCP_LISTEN, if sk is TCP_LISTEN we
check this before attempt to grab lock.
Well, and we have to recheck the state after socket locked.
*/
st = sk->sk_state;
switch (st) {
case TCP_CLOSE:
/* This is ok... continue with connect */
break;
case TCP_ESTABLISHED:
/* Socket is already connected */
err = -EISCONN;
goto out_unlock;
default:
err = -EINVAL;
goto out_unlock;
}
unix_state_lock_nested(sk);
if (sk->sk_state != st) {
unix_state_unlock(sk);
unix_state_unlock(other);
sock_put(other);
goto restart;
}
err = security_unix_stream_connect(sk, other, newsk);
if (err) {
unix_state_unlock(sk);
goto out_unlock;
}
/* The way is open! Fastly set all the necessary fields... */
sock_hold(sk);
unix_peer(newsk) = sk;
newsk->sk_state = TCP_ESTABLISHED;
newsk->sk_type = sk->sk_type;
init_peercred(newsk);
newu = unix_sk(newsk);
RCU_INIT_POINTER(newsk->sk_wq, &newu->peer_wq);
otheru = unix_sk(other);
/* copy address information from listening to new sock*/
if (otheru->addr) {
atomic_inc(&otheru->addr->refcnt);
newu->addr = otheru->addr;
}
if (otheru->path.dentry) {
path_get(&otheru->path);
newu->path = otheru->path;
}
/* Set credentials */
copy_peercred(sk, other);
sock->state = SS_CONNECTED;
sk->sk_state = TCP_ESTABLISHED;
sock_hold(newsk);
smp_mb__after_atomic(); /* sock_hold() does an atomic_inc() */
unix_peer(sk) = newsk;
unix_state_unlock(sk);
/* take ten and and send info to listening sock */
spin_lock(&other->sk_receive_queue.lock);
__skb_queue_tail(&other->sk_receive_queue, skb);
spin_unlock(&other->sk_receive_queue.lock);
unix_state_unlock(other);
other->sk_data_ready(other);
sock_put(other);
return 0;
out_unlock:
if (other)
unix_state_unlock(other);
out:
kfree_skb(skb);
if (newsk)
unix_release_sock(newsk, 0);
if (other)
sock_put(other);
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| pre-git | pre-git | 520 | 73.34% | 11 | 29.73% |
| david s. miller | david s. miller | 50 | 7.05% | 3 | 8.11% |
| james morris | james morris | 25 | 3.53% | 2 | 5.41% |
| linus torvalds | linus torvalds | 19 | 2.68% | 1 | 2.70% |
| arnaldo carvalho de melo | arnaldo carvalho de melo | 16 | 2.26% | 3 | 8.11% |
| benjamin lahaise | benjamin lahaise | 15 | 2.12% | 1 | 2.70% |
| tomoki sekiyama | tomoki sekiyama | 11 | 1.55% | 1 | 2.70% |
| denis v. lunev | denis v. lunev | 9 | 1.27% | 1 | 2.70% |
| eric w. biederman | eric w. biederman | 9 | 1.27% | 3 | 8.11% |
| al viro | al viro | 7 | 0.99% | 1 | 2.70% |
| eric dumazet | eric dumazet | 7 | 0.99% | 3 | 8.11% |
| herbert poetzl | herbert poetzl | 7 | 0.99% | 1 | 2.70% |
| hideaki yoshifuji | hideaki yoshifuji | 6 | 0.85% | 1 | 2.70% |
| steven dake | steven dake | 3 | 0.42% | 1 | 2.70% |
| david howells | david howells | 2 | 0.28% | 1 | 2.70% |
| daniel baluta | daniel baluta | 1 | 0.14% | 1 | 2.70% |
| rainer weikusat | rainer weikusat | 1 | 0.14% | 1 | 2.70% |
| peter zijlstra | peter zijlstra | 1 | 0.14% | 1 | 2.70% |
| Total | 709 | 100.00% | 37 | 100.00% |
static int unix_socketpair(struct socket *socka, struct socket *sockb)
{
struct sock *ska = socka->sk, *skb = sockb->sk;
/* Join our sockets back to back */
sock_hold(ska);
sock_hold(skb);
unix_peer(ska) = skb;
unix_peer(skb) = ska;
init_peercred(ska);
init_peercred(skb);
if (ska->sk_type != SOCK_DGRAM) {
ska->sk_state = TCP_ESTABLISHED;
skb->sk_state = TCP_ESTABLISHED;
socka->state = SS_CONNECTED;
sockb->state = SS_CONNECTED;
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| pre-git | pre-git | 92 | 88.46% | 3 | 42.86% |
| david howells | david howells | 4 | 3.85% | 1 | 14.29% |
| arnaldo carvalho de melo | arnaldo carvalho de melo | 3 | 2.88% | 1 | 14.29% |
| eric w. biederman | eric w. biederman | 3 | 2.88% | 1 | 14.29% |
| pavel emelianov | pavel emelianov | 2 | 1.92% | 1 | 14.29% |
| Total | 104 | 100.00% | 7 | 100.00% |
static void unix_sock_inherit_flags(const struct socket *old,
struct socket *new)
{
if (test_bit(SOCK_PASSCRED, &old->flags))
set_bit(SOCK_PASSCRED, &new->flags);
if (test_bit(SOCK_PASSSEC, &old->flags))
set_bit(SOCK_PASSSEC, &new->flags);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| daniel borkmann | daniel borkmann | 61 | 100.00% | 1 | 100.00% |
| Total | 61 | 100.00% | 1 | 100.00% |
static int unix_accept(struct socket *sock, struct socket *newsock, int flags)
{
struct sock *sk = sock->sk;
struct sock *tsk;
struct sk_buff *skb;
int err;
err = -EOPNOTSUPP;
if (sock->type != SOCK_STREAM && sock->type != SOCK_SEQPACKET)
goto out;
err = -EINVAL;
if (sk->sk_state != TCP_LISTEN)
goto out;
/* If socket state is TCP_LISTEN it cannot change (for now...),
* so that no locks are necessary.
*/
skb = skb_recv_datagram(sk, 0, flags&O_NONBLOCK, &err);
if (!skb) {
/* This means receive shutdown. */
if (err == 0)
err = -EINVAL;
goto out;
}
tsk = skb->sk;
skb_free_datagram(sk, skb);
wake_up_interruptible(&unix_sk(sk)->peer_wait);
/* attach accepted sock to socket */
unix_state_lock(tsk);
newsock->state = SS_CONNECTED;
unix_sock_inherit_flags(sock, newsock);
sock_graft(tsk, newsock);
unix_state_unlock(tsk);
return 0;
out:
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| pre-git | pre-git | 144 | 79.56% | 5 | 41.67% |
| linus torvalds | linus torvalds | 14 | 7.73% | 1 | 8.33% |
| daniel borkmann | daniel borkmann | 7 | 3.87% | 1 | 8.33% |
| steven dake | steven dake | 6 | 3.31% | 1 | 8.33% |
| david s. miller | david s. miller | 5 | 2.76% | 2 | 16.67% |
| arnaldo carvalho de melo | arnaldo carvalho de melo | 5 | 2.76% | 2 | 16.67% |
| Total | 181 | 100.00% | 12 | 100.00% |
static int unix_getname(struct socket *sock, struct sockaddr *uaddr, int *uaddr_len, int peer)
{
struct sock *sk = sock->sk;
struct unix_sock *u;
DECLARE_SOCKADDR(struct sockaddr_un *, sunaddr, uaddr);
int err = 0;
if (peer) {
sk = unix_peer_get(sk);
err = -ENOTCONN;
if (!sk)
goto out;
err = 0;
} else {
sock_hold(sk);
}
u = unix_sk(sk);
unix_state_lock(sk);
if (!u->addr) {
sunaddr->sun_family = AF_UNIX;
sunaddr->sun_path[0] = 0;
*uaddr_len = sizeof(short);
} else {
struct unix_address *addr = u->addr;
*uaddr_len = addr->len;
memcpy(sunaddr, addr->name, *uaddr_len);
}
unix_state_unlock(sk);
sock_put(sk);
out:
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| pre-git | pre-git | 159 | 87.85% | 3 | 42.86% |
| david s. miller | david s. miller | 8 | 4.42% | 2 | 28.57% |
| cyrill gorcunov | cyrill gorcunov | 7 | 3.87% | 1 | 14.29% |
| ray lee | ray lee | 7 | 3.87% | 1 | 14.29% |
| Total | 181 | 100.00% | 7 | 100.00% |
static void unix_detach_fds(struct scm_cookie *scm, struct sk_buff *skb)
{
int i;
scm->fp = UNIXCB(skb).fp;
UNIXCB(skb).fp = NULL;
for (i = scm->fp->count-1; i >= 0; i--)
unix_notinflight(scm->fp->user, scm->fp->fp[i]);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| pre-git | pre-git | 70 | 92.11% | 2 | 66.67% |
| hannes frederic sowa | hannes frederic sowa | 6 | 7.89% | 1 | 33.33% |
| Total | 76 | 100.00% | 3 | 100.00% |
static void unix_destruct_scm(struct sk_buff *skb)
{
struct scm_cookie scm;
memset(&scm, 0, sizeof(scm));
scm.pid = UNIXCB(skb).pid;
if (UNIXCB(skb).fp)
unix_detach_fds(&scm, skb);
/* Alas, it calls VFS */
/* So fscking what? fput() had been SMP-safe since the last Summer */
scm_destroy(&scm);
sock_wfree(skb);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| pre-git | pre-git | 48 | 69.57% | 4 | 80.00% |
| eric w. biederman | eric w. biederman | 21 | 30.43% | 1 | 20.00% |
| Total | 69 | 100.00% | 5 | 100.00% |
/*
* The "user->unix_inflight" variable is protected by the garbage
* collection lock, and we just read it locklessly here. If you go
* over the limit, there might be a tiny race in actually noticing
* it across threads. Tough.
*/
static inline bool too_many_unix_fds(struct task_struct *p)
{
struct user_struct *user = current_user();
if (unlikely(user->unix_inflight > task_rlimit(p, RLIMIT_NOFILE)))
return !capable(CAP_SYS_RESOURCE) && !capable(CAP_SYS_ADMIN);
return false;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| willy tarreau | willy tarreau | 52 | 100.00% | 1 | 100.00% |
| Total | 52 | 100.00% | 1 | 100.00% |
#define MAX_RECURSION_LEVEL 4
static int unix_attach_fds(struct scm_cookie *scm, struct sk_buff *skb)
{
int i;
unsigned char max_level = 0;
if (too_many_unix_fds(current))
return -ETOOMANYREFS;
for (i = scm->fp->count - 1; i >= 0; i--) {
struct sock *sk = unix_get_socket(scm->fp->fp[i]);
if (sk)
max_level = max(max_level,
unix_sk(sk)->recursion_level);
}
if (unlikely(max_level > MAX_RECURSION_LEVEL))
return -ETOOMANYREFS;
/*
* Need to duplicate file references for the sake of garbage
* collection. Otherwise a socket in the fps might become a
* candidate for GC while the skb is not yet queued.
*/
UNIXCB(skb).fp = scm_fp_dup(scm->fp);
if (!UNIXCB(skb).fp)
return -ENOMEM;
for (i = scm->fp->count - 1; i >= 0; i--)
unix_inflight(scm->fp->user, scm->fp->fp[i]);
return max_level;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| eric dumazet | eric dumazet | 76 | 43.68% | 1 | 14.29% |
| pre-git | pre-git | 48 | 27.59% | 2 | 28.57% |
| miklos szeredi | miklos szeredi | 30 | 17.24% | 1 | 14.29% |
| willy tarreau | willy tarreau | 11 | 6.32% | 1 | 14.29% |
| hannes frederic sowa | hannes frederic sowa | 6 | 3.45% | 1 | 14.29% |
| eric w. biederman | eric w. biederman | 3 | 1.72% | 1 | 14.29% |
| Total | 174 | 100.00% | 7 | 100.00% |
static int unix_scm_to_skb(struct scm_cookie *scm, struct sk_buff *skb, bool send_fds)
{
int err = 0;
UNIXCB(skb).pid = get_pid(scm->pid);
UNIXCB(skb).uid = scm->creds.uid;
UNIXCB(skb).gid = scm->creds.gid;
UNIXCB(skb).fp = NULL;
unix_get_secdata(scm, skb);
if (scm->fp && send_fds)
err = unix_attach_fds(scm, skb);
skb->destructor = unix_destruct_scm;
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| eric w. biederman | eric w. biederman | 89 | 83.96% | 2 | 28.57% |
| stephen d. smalley | stephen d. smalley | 7 | 6.60% | 1 | 14.29% |
| pre-git | pre-git | 6 | 5.66% | 2 | 28.57% |
| eric dumazet | eric dumazet | 2 | 1.89% | 1 | 14.29% |
| miklos szeredi | miklos szeredi | 2 | 1.89% | 1 | 14.29% |
| Total | 106 | 100.00% | 7 | 100.00% |
static bool unix_passcred_enabled(const struct socket *sock,
const struct sock *other)
{
return test_bit(SOCK_PASSCRED, &sock->flags) ||
!other->sk_socket ||
test_bit(SOCK_PASSCRED, &other->sk_socket->flags);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| hannes frederic sowa | hannes frederic sowa | 46 | 100.00% | 1 | 100.00% |
| Total | 46 | 100.00% | 1 | 100.00% |
/*
* Some apps rely on write() giving SCM_CREDENTIALS
* We include credentials if source or destination socket
* asserted SOCK_PASSCRED.
*/
static void maybe_add_creds(struct sk_buff *skb, const struct socket *sock,
const struct sock *other)
{
if (UNIXCB(skb).pid)
return;
if (unix_passcred_enabled(sock, other)) {
UNIXCB(skb).pid = get_pid(task_tgid(current));
current_uid_gid(&UNIXCB(skb).uid, &UNIXCB(skb).gid);
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| eric dumazet | eric dumazet | 63 | 80.77% | 1 | 25.00% |
| eric w. biederman | eric w. biederman | 13 | 16.67% | 1 | 25.00% |
| david s. miller | david s. miller | 1 | 1.28% | 1 | 25.00% |
| hannes frederic sowa | hannes frederic sowa | 1 | 1.28% | 1 | 25.00% |
| Total | 78 | 100.00% | 4 | 100.00% |
static int maybe_init_creds(struct scm_cookie *scm,
struct socket *socket,
const struct sock *other)
{
int err;
struct msghdr msg = { .msg_controllen = 0 };
err = scm_send(socket, &msg, scm, false);
if (err)
return err;
if (unix_passcred_enabled(socket, other)) {
scm->pid = get_pid(task_tgid(current));
current_uid_gid(&scm->creds.uid, &scm->creds.gid);
}
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| hannes frederic sowa | hannes frederic sowa | 90 | 90.00% | 1 | 20.00% |
| eric w. biederman | eric w. biederman | 5 | 5.00% | 1 | 20.00% |
| pre-git | pre-git | 3 | 3.00% | 2 | 40.00% |
| miklos szeredi | miklos szeredi | 2 | 2.00% | 1 | 20.00% |
| Total | 100 | 100.00% | 5 | 100.00% |
static bool unix_skb_scm_eq(struct sk_buff *skb,
struct scm_cookie *scm)
{
const struct unix_skb_parms *u = &UNIXCB(skb);
return u->pid == scm->pid &&
uid_eq(u->uid, scm->creds.uid) &&
gid_eq(u->gid, scm->creds.gid) &&
unix_secdata_eq(scm, skb);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| hannes frederic sowa | hannes frederic sowa | 39 | 55.71% | 1 | 33.33% |
| eric dumazet | eric dumazet | 27 | 38.57% | 1 | 33.33% |
| eric w. biederman | eric w. biederman | 4 | 5.71% | 1 | 33.33% |
| Total | 70 | 100.00% | 3 | 100.00% |
/*
* Send AF_UNIX data.
*/
static int unix_dgram_sendmsg(struct socket *sock, struct msghdr *msg,
size_t len)
{
struct sock *sk = sock->sk;
struct net *net = sock_net(sk);
struct unix_sock *u = unix_sk(sk);
DECLARE_SOCKADDR(struct sockaddr_un *, sunaddr, msg->msg_name);
struct sock *other = NULL;
int namelen = 0; /* fake GCC */
int err;
unsigned int hash;
struct sk_buff *skb;
long timeo;
struct scm_cookie scm;
int max_level;
int data_len = 0;
int sk_locked;
wait_for_unix_gc();
err = scm_send(sock, msg, &scm, false);
if (err < 0)
return err;
err = -EOPNOTSUPP;
if (msg->msg_flags&MSG_OOB)
goto out;
if (msg->msg_namelen) {
err = unix_mkname(sunaddr, msg->msg_namelen, &hash);
if (err < 0)
goto out;
namelen = err;
} else {
sunaddr = NULL;
err = -ENOTCONN;
other = unix_peer_get(sk);
if (!other)
goto out;
}
if (test_bit(SOCK_PASSCRED, &sock->flags) && !u->addr
&& (err = unix_autobind(sock)) != 0)
goto out;
err = -EMSGSIZE;
if (len > sk->sk_sndbuf - 32)
goto out;
if (len > SKB_MAX_ALLOC) {
data_len = min_t(size_t,
len - SKB_MAX_ALLOC,
MAX_SKB_FRAGS * PAGE_SIZE);
data_len = PAGE_ALIGN(data_len);
BUILD_BUG_ON(SKB_MAX_ALLOC < PAGE_SIZE);
}
skb = sock_alloc_send_pskb(sk, len - data_len, data_len,
msg->msg_flags & MSG_DONTWAIT, &err,
PAGE_ALLOC_COSTLY_ORDER);
if (skb == NULL)
goto out;
err = unix_scm_to_skb(&scm, skb, true);
if (err < 0)
goto out_free;
max_level = err + 1;
skb_put(skb, len - data_len);
skb->data_len = data_len;
skb->len = len;
err = skb_copy_datagram_from_iter(skb, 0, &msg->msg_iter, len);
if (err)
goto out_free;
timeo = sock_sndtimeo(sk, msg->msg_flags & MSG_DONTWAIT);
restart:
if (!other) {
err = -ECONNRESET;
if (sunaddr == NULL)
goto out_free;
other = unix_find_other(net, sunaddr, namelen, sk->sk_type,
hash, &err);
if (other == NULL)
goto out_free;
}
if (sk_filter(other, skb) < 0) {
/* Toss the packet but do not return any error to the sender */
err = len;
goto out_free;
}
sk_locked = 0;
unix_state_lock(other);
restart_locked:
err = -EPERM;
if (!unix_may_send(sk, other))
goto out_unlock;
if (unlikely(sock_flag(other, SOCK_DEAD))) {
/*
* Check with 1003.1g - what should
* datagram error
*/
unix_state_unlock(other);
sock_put(other);
if (!sk_locked)
unix_state_lock(sk);
err = 0;
if (unix_peer(sk) == other) {
unix_peer(sk) = NULL;
unix_dgram_peer_wake_disconnect_wakeup(sk, other);
unix_state_unlock(sk);
unix_dgram_disconnected(sk, other);
sock_put(other);
err = -ECONNREFUSED;
} else {
unix_state_unlock(sk);
}
other = NULL;
if (err)
goto out_free;
goto restart;
}
err = -EPIPE;
if (other->sk_shutdown & RCV_SHUTDOWN)
goto out_unlock;
if (sk->sk_type != SOCK_SEQPACKET) {
err = security_unix_may_send(sk->sk_socket, other->sk_socket);
if (err)
goto out_unlock;
}
/* other == sk && unix_peer(other) != sk if
* - unix_peer(sk) == NULL, destination address bound to sk
* - unix_peer(sk) == sk by time of get but disconnected before lock
*/
if (other != sk &&
unlikely(unix_peer(other) != sk && unix_recvq_full(other))) {
if (timeo) {
timeo = unix_wait_for_peer(other, timeo);
err = sock_intr_errno(timeo);
if (signal_pending(current))
goto out_free;
goto restart;
}
if (!sk_locked) {
unix_state_unlock(other);
unix_state_double_lock(sk, other);
}
if (unix_peer(sk) != other ||
unix_dgram_peer_wake_me(sk, other)) {
err = -EAGAIN;
sk_locked = 1;
goto out_unlock;
}
if (!sk_locked) {
sk_locked = 1;
goto restart_locked;
}
}
if (unlikely(sk_locked))
unix_state_unlock(sk);
if (sock_flag(other, SOCK_RCVTSTAMP))
__net_timestamp(skb);
maybe_add_creds(skb, sock, other);
skb_queue_tail(&other->sk_receive_queue, skb);
if (max_level > unix_sk(other)->recursion_level)
unix_sk(other)->recursion_level = max_level;
unix_state_unlock(other);
other->sk_data_ready(other);
sock_put(other);
scm_destroy(&scm);
return len;
out_unlock:
if (sk_locked)
unix_state_unlock(sk);
unix_state_unlock(other);
out_free:
kfree_skb(skb);
out:
if (other)
sock_put(other);
scm_destroy(&scm);
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| pre-git | pre-git | 519 | 56.23% | 14 | 29.17% |
| rainer weikusat | rainer weikusat | 109 | 11.81% | 3 | 6.25% |
| eric dumazet | eric dumazet | 95 | 10.29% | 6 | 12.50% |
| alban crequy | alban crequy | 37 | 4.01% | 2 | 4.17% |
| benjamin lahaise | benjamin lahaise | 32 | 3.47% | 1 | 2.08% |
| james morris | james morris | 30 | 3.25% | 3 | 6.25% |
| david s. miller | david s. miller | 18 | 1.95% | 3 | 6.25% |
| kirill tkhai | kirill tkhai | 16 | 1.73% | 1 | 2.08% |
| arnaldo carvalho de melo | arnaldo carvalho de melo | 14 | 1.52% | 4 | 8.33% |
| denis v. lunev | denis v. lunev | 9 | 0.98% | 1 | 2.08% |
| miklos szeredi | miklos szeredi | 9 | 0.98% | 1 | 2.08% |
| steffen hurrle | steffen hurrle | 8 | 0.87% | 1 | 2.08% |
| herbert poetzl | herbert poetzl | 7 | 0.76% | 1 | 2.08% |
| al viro | al viro | 5 | 0.54% | 2 | 4.17% |
| christoph hellwig | christoph hellwig | 5 | 0.54% | 1 | 2.08% |
| dann frazier | dann frazier | 3 | 0.33% | 1 | 2.08% |
| eric w. biederman | eric w. biederman | 3 | 0.33% | 1 | 2.08% |
| hideaki yoshifuji | hideaki yoshifuji | 3 | 0.33% | 1 | 2.08% |
| stephen hemminger | stephen hemminger | 1 | 0.11% | 1 | 2.08% |
| Total | 923 | 100.00% | 48 | 100.00% |
/* We use paged skbs for stream sockets, and limit occupancy to 32768
* bytes, and a minimun of a full page.
*/
#define UNIX_SKB_FRAGS_SZ (PAGE_SIZE << get_order(32768))
static int unix_stream_sendmsg(struct socket *sock, struct msghdr *msg,
size_t len)
{
struct sock *sk = sock->sk;
struct sock *other = NULL;
int err, size;
struct sk_buff *skb;
int sent = 0;
struct scm_cookie scm;
bool fds_sent = false;
int max_level;
int data_len;
wait_for_unix_gc();
err = scm_send(sock, msg, &scm, false);
if (err < 0)
return err;
err = -EOPNOTSUPP;
if (msg->msg_flags&MSG_OOB)
goto out_err;
if (msg->msg_namelen) {
err = sk->sk_state == TCP_ESTABLISHED ? -EISCONN : -EOPNOTSUPP;
goto out_err;
} else {
err = -ENOTCONN;
other = unix_peer(sk);
if (!other)
goto out_err;
}
if (sk->sk_shutdown & SEND_SHUTDOWN)
goto pipe_err;
while (sent < len) {
size = len - sent;
/* Keep two messages in the pipe so it schedules better */
size = min_t(int, size, (sk->sk_sndbuf >> 1) - 64);
/* allow fallback to order-0 allocations */
size = min_t(int, size, SKB_MAX_HEAD(0) + UNIX_SKB_FRAGS_SZ);
data_len = max_t(int, 0, size - SKB_MAX_HEAD(0));
data_len = min_t(size_t, size, PAGE_ALIGN(data_len));
skb = sock_alloc_send_pskb(sk, size - data_len, data_len,
msg->msg_flags & MSG_DONTWAIT, &err,
get_order(UNIX_SKB_FRAGS_SZ));
if (!skb)
goto out_err;
/* Only send the fds in the first buffer */
err = unix_scm_to_skb(&scm, skb, !fds_sent);
if (err < 0) {
kfree_skb(skb);
goto out_err;
}
max_level = err + 1;
fds_sent = true;
skb_put(skb, size - data_len);
skb->data_len = data_len;
skb->len = size;
err = skb_copy_datagram_from_iter(skb, 0, &msg->msg_iter, size);
if (err) {
kfree_skb(skb);
goto out_err;
}
unix_state_lock(other);
if (sock_flag(other, SOCK_DEAD) ||
(other->sk_shutdown & RCV_SHUTDOWN))
goto pipe_err_free;
maybe_add_creds(skb, sock, other);
skb_queue_tail(&other->sk_receive_queue, skb);
if (max_level > unix_sk(other)->recursion_level)
unix_sk(other)->recursion_level = max_level;
unix_state_unlock(other);
other->sk_data_ready(other);
sent += size;
}
scm_destroy(&scm);
return sent;
pipe_err_free:
unix_state_unlock(other);
kfree_skb(skb);
pipe_err:
if (sent == 0 && !(msg->msg_flags&MSG_NOSIGNAL))
send_sig(SIGPIPE, current, 0);
err = -EPIPE;
out_err:
scm_destroy(&scm);
return sent ? : err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| pre-git | pre-git | 285 | 54.91% | 11 | 30.56% |
| eric dumazet | eric dumazet | 118 | 22.74% | 6 | 16.67% |
| benjamin lahaise | benjamin lahaise | 38 | 7.32% | 3 | 8.33% |
| miklos szeredi | miklos szeredi | 22 | 4.24% | 2 | 5.56% |
| kirill tkhai | kirill tkhai | 14 | 2.70% | 1 | 2.78% |
| arnaldo carvalho de melo | arnaldo carvalho de melo | 11 | 2.12% | 3 | 8.33% |
| david s. miller | david s. miller | 6 | 1.16% | 2 | 5.56% |
| al viro | al viro | 5 | 0.96% | 2 | 5.56% |
| linus torvalds | linus torvalds | 5 | 0.96% | 1 | 2.78% |
| christoph hellwig | christoph hellwig | 5 | 0.96% | 1 | 2.78% |
| eric w. biederman | eric w. biederman | 4 | 0.77% | 1 | 2.78% |
| dann frazier | dann frazier | 3 | 0.58% | 1 | 2.78% |
| james morris | james morris | 2 | 0.39% | 1 | 2.78% |
| stephen hemminger | stephen hemminger | 1 | 0.19% | 1 | 2.78% |
| Total | 519 | 100.00% | 36 | 100.00% |
static ssize_t unix_stream_sendpage(struct socket *socket, struct page *page,
int offset, size_t size, int flags)
{
int err;
bool send_sigpipe = false;
bool init_scm = true;
struct scm_cookie scm;
struct sock *other, *sk = socket->sk;
struct sk_buff *skb, *newskb = NULL, *tail = NULL;
if (flags & MSG_OOB)
return -EOPNOTSUPP;
other = unix_peer(sk);
if (!other || sk->sk_state != TCP_ESTABLISHED)
return -ENOTCONN;
if (false) {
alloc_skb:
unix_state_unlock(other);
mutex_unlock(&unix_sk(other)->readlock);
newskb = sock_alloc_send_pskb(sk, 0, 0, flags & MSG_DONTWAIT,
&err, 0);
if (!newskb)
goto err;
}
/* we must acquire readlock as we modify already present
* skbs in the sk_receive_queue and mess with skb->len
*/
err = mutex_lock_interruptible(&unix_sk(other)->readlock);
if (err) {
err = flags & MSG_DONTWAIT ? -EAGAIN : -ERESTARTSYS;
goto err;
}
if (sk->sk_shutdown & SEND_SHUTDOWN) {
err = -EPIPE;
send_sigpipe = true;
goto err_unlock;
}
unix_state_lock(other);
if (sock_flag(other, SOCK_DEAD) ||
other->sk_shutdown & RCV_SHUTDOWN) {
err = -EPIPE;
send_sigpipe = true;
goto err_state_unlock;
}
if (init_scm) {
err = maybe_init_creds(&scm, socket, other);
if (err)
goto err_state_unlock;
init_scm = false;
}
skb = skb_peek_tail(&other->sk_receive_queue);
if (tail && tail == skb) {
skb = newskb;
} else if (!skb || !unix_skb_scm_eq(skb, &scm)) {
if (newskb) {
skb = newskb;
} else {
tail = skb;
goto alloc_skb;
}
} else if (newskb) {
/* this is fast path, we don't necessarily need to
* call to kfree_skb even though with newskb == NULL
* this - does no harm
*/
consume_skb(newskb);
newskb = NULL;
}
if (skb_append_pagefrags(skb, page, offset, size)) {
tail = skb;
goto alloc_skb;
}
skb->len += size;
skb->data_len += size;
skb->truesize += size;
atomic_add(size, &sk->sk_wmem_alloc);
if (newskb) {
err = unix_scm_to_skb(&scm, skb, false);
if (err)
goto err_state_unlock;
spin_lock(&other->sk_receive_queue.lock);
__skb_queue_tail(&other->sk_receive_queue, newskb);
spin_unlock(&other->sk_receive_queue.lock);
}
unix_state_unlock(other);
mutex_unlock(&unix_sk(other)->readlock);
other->sk_data_ready(other);
scm_destroy(&scm);
return size;
err_state_unlock:
unix_state_unlock(other);
err_unlock:
mutex_unlock(&unix_sk(other)->readlock);
err:
kfree_skb(newskb);
if (send_sigpipe && !(flags & MSG_NOSIGNAL))
send_sig(SIGPIPE, current, 0);
if (!init_scm)
scm_destroy(&scm);
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| hannes frederic sowa | hannes frederic sowa | 549 | 100.00% | 4 | 100.00% |
| Total | 549 | 100.00% | 4 | 100.00% |
static int unix_seqpacket_sendmsg(struct socket *sock, struct msghdr *msg,
size_t len)
{
int err;
struct sock *sk = sock->sk;
err = sock_error(sk);
if (err)
return err;
if (sk->sk_state != TCP_ESTABLISHED)
return -ENOTCONN;
if (msg->msg_namelen)
msg->msg_namelen = 0;
return unix_dgram_sendmsg(sock, msg, len);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| james morris | james morris | 79 | 100.00% | 2 | 100.00% |
| Total | 79 | 100.00% | 2 | 100.00% |
static int unix_seqpacket_recvmsg(struct socket *sock, struct msghdr *msg,
size_t size, int flags)
{
struct sock *sk = sock->sk;
if (sk->sk_state != TCP_ESTABLISHED)
return -ENOTCONN;
return unix_dgram_recvmsg(sock, msg, size, flags);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| eric w. biederman | eric w. biederman | 55 | 100.00% | 1 | 100.00% |
| Total | 55 | 100.00% | 1 | 100.00% |
static void unix_copy_addr(struct msghdr *msg, struct sock *sk)
{
struct unix_sock *u = unix_sk(sk);
if (u->addr) {
msg->msg_namelen = u->addr->len;
memcpy(msg->msg_name, u->addr->name, u->addr->len);
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| pre-git | pre-git | 49 | 77.78% | 6 | 85.71% |
| david s. miller | david s. miller | 14 | 22.22% | 1 | 14.29% |
| Total | 63 | 100.00% | 7 | 100.00% |
static int unix_dgram_recvmsg(struct socket *sock, struct msghdr *msg,
size_t size, int flags)
{
struct scm_cookie scm;
struct sock *sk = sock->sk;
struct unix_sock *u = unix_sk(sk);
struct sk_buff *skb, *last;
long timeo;
int err;
int peeked, skip;
err = -EOPNOTSUPP;
if (flags&MSG_OOB)
goto out;
timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
do {
mutex_lock(&u->readlock);
skip = sk_peek_offset(sk, flags);
skb = __skb_try_recv_datagram(sk, flags, &peeked, &skip, &err,
&last);
if (skb)
break;
mutex_unlock(&u->readlock);
if (err != -EAGAIN)
break;
} while (timeo &&
!__skb_wait_for_more_packets(sk, &err, &timeo, last));
if (!skb) { /* implies readlock unlocked */
unix_state_lock(sk);
/* Signal EOF on disconnected non-blocking SEQPACKET socket. */
if (sk->sk_type == SOCK_SEQPACKET && err == -EAGAIN &&
(sk->sk_shutdown & RCV_SHUTDOWN))
err = 0;
unix_state_unlock(sk);
goto out;
}
if (wq_has_sleeper(&u->peer_wait))
wake_up_interruptible_sync_poll(&u->peer_wait,
POLLOUT | POLLWRNORM |
POLLWRBAND);
if (msg->msg_name)
unix_copy_addr(msg, skb->sk);
if (size > skb->len - skip)
size = skb->len - skip;
else if (size < skb->len - skip)
msg->msg_flags |= MSG_TRUNC;
err = skb_copy_datagram_msg(skb, skip, msg, size);
if (err)
goto out_free;
if (sock_flag(sk, SOCK_RCVTSTAMP))
__sock_recv_timestamp(msg, sk, skb);
memset(&scm, 0, sizeof(scm));
scm_set_cred(&scm, UNIXCB(skb).pid, UNIXCB(skb).uid, UNIXCB(skb).gid);
unix_set_secdata(&scm, skb);
if (!(flags & MSG_PEEK)) {
if (UNIXCB(skb).fp)
unix_detach_fds(&scm, skb);
sk_peek_offset_bwd(sk, skb->len);
} else {
/* It is questionable: on PEEK we could:
- do not return fds - good, but too simple 8)
- return fds, and do not return them on read (old strategy,
apparently wrong)
- clone fds (I chose it for now, it is the most universal
solution)
POSIX 1003.1g does not actually define this clearly
at all. POSIX 1003.1g doesn't define a lot of things
clearly however!
*/
sk_peek_offset_fwd(sk, size);
if (UNIXCB(skb).fp)
scm.fp = scm_fp_dup(UNIXCB(skb).fp);
}
err = (flags & MSG_TRUNC) ? skb->len - skip : size;
scm_recv(sock, msg, &scm, flags);
out_free:
skb_free_datagram(sk, skb);
mutex_unlock(&u->readlock);
out:
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| pre-git | pre-git | 214 | 42.97% | 11 | 34.38% |
| rainer weikusat | rainer weikusat | 78 | 15.66% | 3 | 9.38% |
| pavel emelianov | pavel emelianov | 42 | 8.43% | 1 | 3.12% |
| florian zumbiehl | florian zumbiehl | 38 | 7.63% | 1 | 3.12% |
| benjamin lahaise | benjamin lahaise | 27 | 5.42% | 1 | 3.12% |
| david s. miller | david s. miller | 23 | 4.62% | 4 | 12.50% |
| eric dumazet | eric dumazet | 21 | 4.22% | 3 | 9.38% |
| eric w. biederman | eric w. biederman | 20 | 4.02% | 2 | 6.25% |
| alban crequy | alban crequy | 16 | 3.21% | 1 | 3.12% |
| christoph hellwig | christoph hellwig | 8 | 1.61% | 1 | 3.12% |
| catherine zhang | catherine zhang | 7 | 1.41% | 1 | 3.12% |
| ingo molnar | ingo molnar | 2 | 0.40% | 1 | 3.12% |
| stephen hemminger | stephen hemminger | 1 | 0.20% | 1 | 3.12% |
| hideaki yoshifuji | hideaki yoshifuji | 1 | 0.20% | 1 | 3.12% |
| Total | 498 | 100.00% | 32 | 100.00% |
/*
* Sleep until more data has arrived. But check for races..
*/
static long unix_stream_data_wait(struct sock *sk, long timeo,
struct sk_buff *last, unsigned int last_len)
{
struct sk_buff *tail;
DEFINE_WAIT(wait);
unix_state_lock(sk);
for (;;) {
prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
tail = skb_peek_tail(&sk->sk_receive_queue);
if (tail != last ||
(tail && tail->len != last_len) ||
sk->sk_err ||
(sk->sk_shutdown & RCV_SHUTDOWN) ||
signal_pending(current) ||
!timeo)
break;
sk_set_bit(SOCKWQ_ASYNC_WAITDATA, sk);
unix_state_unlock(sk);
timeo = freezable_schedule_timeout(timeo);
unix_state_lock(sk);
if (sock_flag(sk, SOCK_DEAD))
break;
sk_clear_bit(SOCKWQ_ASYNC_WAITDATA, sk);
}
finish_wait(sk_sleep(sk), &wait);
unix_state_unlock(sk);
return timeo;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| pre-git | pre-git | 97 | 58.79% | 6 | 37.50% |
| hannes frederic sowa | hannes frederic sowa | 25 | 15.15% | 1 | 6.25% |
| eric dumazet | eric dumazet | 10 | 6.06% | 2 | 12.50% |
| david s. miller | david s. miller | 10 | 6.06% | 2 | 12.50% |
| benjamin poirier | benjamin poirier | 8 | 4.85% | 1 | 6.25% |
| arnaldo carvalho de melo | arnaldo carvalho de melo | 7 | 4.24% | 2 | 12.50% |
| andrew morton | andrew morton | 7 | 4.24% | 1 | 6.25% |
| colin cross | colin cross | 1 | 0.61% | 1 | 6.25% |
| Total | 165 | 100.00% | 16 | 100.00% |
static unsigned int unix_skb_len(const struct sk_buff *skb)
{
return skb->len - UNIXCB(skb).consumed;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| eric dumazet | eric dumazet | 25 | 100.00% | 1 | 100.00% |
| Total | 25 | 100.00% | 1 | 100.00% |
struct unix_stream_read_state {
int (*recv_actor)(struct sk_buff *, int, int,
struct unix_stream_read_state *);
struct socket *socket;
struct msghdr *msg;
struct pipe_inode_info *pipe;
size_t size;
int flags;
unsigned int splice_flags;
};
static int unix_stream_read_generic(struct unix_stream_read_state *state)
{
struct scm_cookie scm;
struct socket *sock = state->socket;
struct sock *sk = sock->sk;
struct unix_sock *u = unix_sk(sk);
int copied = 0;
int flags = state->flags;
int noblock = flags & MSG_DONTWAIT;
bool check_creds = false;
int target;
int err = 0;
long timeo;
int skip;
size_t size = state->size;
unsigned int last_len;
if (unlikely(sk->sk_state != TCP_ESTABLISHED)) {
err = -EINVAL;
goto out;
}
if (unlikely(flags & MSG_OOB)) {
err = -EOPNOTSUPP;
goto out;
}
target = sock_rcvlowat(sk, flags & MSG_WAITALL, size);
timeo = sock_rcvtimeo(sk, noblock);
memset(&scm, 0, sizeof(scm));
/* Lock the socket to prevent queue disordering
* while sleeps in memcpy_tomsg
*/
mutex_lock(&u->readlock);
if (flags & MSG_PEEK)
skip = sk_peek_offset(sk, flags);
else
skip = 0;
do {
int chunk;
bool drop_skb;
struct sk_buff *skb, *last;
redo:
unix_state_lock(sk);
if (sock_flag(sk, SOCK_DEAD)) {
err = -ECONNRESET;
goto unlock;
}
last = skb = skb_peek(&sk->sk_receive_queue);
last_len = last ? last->len : 0;
again:
if (skb == NULL) {
unix_sk(sk)->recursion_level = 0;
if (copied >= target)
goto unlock;
/*
* POSIX 1003.1g mandates this order.
*/
err = sock_error(sk);
if (err)
goto unlock;
if (sk->sk_shutdown & RCV_SHUTDOWN)
goto unlock;
unix_state_unlock(sk);
if (!timeo) {
err = -EAGAIN;
break;
}
mutex_unlock(&u->readlock);
timeo = unix_stream_data_wait(sk, timeo, last,
last_len);
if (signal_pending(current)) {
err = sock_intr_errno(timeo);
scm_destroy(&scm);
goto out;
}
mutex_lock(&u->readlock);
goto redo;
unlock:
unix_state_unlock(sk);
break;
}
while (skip >= unix_skb_len(skb)) {
skip -= unix_skb_len(skb);
last = skb;
last_len = skb->len;
skb = skb_peek_next(skb, &sk->sk_receive_queue);
if (!skb)
goto again;
}
unix_state_unlock(sk);
if (check_creds) {
/* Never glue messages from different writers */
if (!unix_skb_scm_eq(skb, &scm))
break;
} else if (test_bit(SOCK_PASSCRED, &sock->flags)) {
/* Copy credentials */
scm_set_cred(&scm, UNIXCB(skb).pid, UNIXCB(skb).uid, UNIXCB(skb).gid);
unix_set_secdata(&scm, skb);
check_creds = true;
}
/* Copy address just once */
if (state->msg && state->msg->msg_name) {
DECLARE_SOCKADDR(struct sockaddr_un *, sunaddr,
state->msg->msg_name);
unix_copy_addr(state->msg, skb->sk);
sunaddr = NULL;
}
chunk = min_t(unsigned int, unix_skb_len(skb) - skip, size);
skb_get(skb);
chunk = state->recv_actor(skb, skip, chunk, state);
drop_skb = !unix_skb_len(skb);
/* skb is only safe to use if !drop_skb */
consume_skb(skb);
if (chunk < 0) {
if (copied == 0)
copied = -EFAULT;
break;
}
copied += chunk;
size -= chunk;
if (drop_skb) {
/* the skb was touched by a concurrent reader;
* we should not expect anything from this skb
* anymore and assume it invalid - we can be
* sure it was dropped from the socket queue
*
* let's report a short read
*/
err = 0;
break;
}
/* Mark read part of skb as used */
if (!(flags & MSG_PEEK)) {
UNIXCB(skb).consumed += chunk;
sk_peek_offset_bwd(sk, chunk);
if (UNIXCB(skb).fp)
unix_detach_fds(&scm, skb);
if (unix_skb_len(skb))
break;
skb_unlink(skb, &sk->sk_receive_queue);
consume_skb(skb);
if (scm.fp)
break;
} else {
/* It is questionable, see note in unix_dgram_recvmsg.
*/
if (UNIXCB(skb).fp)
scm.fp = scm_fp_dup(UNIXCB(skb).fp);
sk_peek_offset_fwd(sk, chunk);
if (UNIXCB(skb).fp)
break;
skip = 0;
last = skb;
last_len = skb->len;
unix_state_lock(sk);
skb = skb_peek_next(skb, &sk->sk_receive_queue);
if (skb)
goto again;
unix_state_unlock(sk);
break;
}
} while (size);
mutex_unlock(&u->readlock);
if (state->msg)
scm_recv(sock, state->msg, &scm, flags);
else
scm_destroy(&scm);
out:
return copied ? : err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| pre-git | pre-git | 213 | 24.60% | 15 | 32.61% |
| david s. miller | david s. miller | 170 | 19.63% | 4 | 8.70% |
| hannes frederic sowa | hannes frederic sowa | 146 | 16.86% | 3 | 6.52% |
| aaron conole | aaron conole | 49 | 5.66% | 1 | 2.17% |
| eric dumazet | eric dumazet | 47 | 5.43% | 6 | 13.04% |
| pavel emelianov | pavel emelianov | 46 | 5.31% | 1 | 2.17% |
| rainer weikusat | rainer weikusat | 42 | 4.85% | 4 | 8.70% |
| eric w. biederman | eric w. biederman | 37 | 4.27% | 3 | 6.52% |
| miklos szeredi | miklos szeredi | 32 | 3.70% | 1 | 2.17% |
| andrey vagin | andrey vagin | 22 | 2.54% | 1 | 2.17% |
| benjamin poirier | benjamin poirier | 17 | 1.96% | 1 | 2.17% |
| benjamin lahaise | benjamin lahaise | 16 | 1.85% | 1 | 2.17% |
| stephen d. smalley | stephen d. smalley | 11 | 1.27% | 1 | 2.17% |
| christoph hellwig | christoph hellwig | 8 | 0.92% | 1 | 2.17% |
| ingo molnar | ingo molnar | 5 | 0.58% | 1 | 2.17% |
| arnaldo carvalho de melo | arnaldo carvalho de melo | 4 | 0.46% | 1 | 2.17% |
| neil horman | neil horman | 1 | 0.12% | 1 | 2.17% |
| Total | 866 | 100.00% | 46 | 100.00% |
static int unix_stream_read_actor(struct sk_buff *skb,
int skip, int chunk,
struct unix_stream_read_state *state)
{
int ret;
ret = skb_copy_datagram_msg(skb, UNIXCB(skb).consumed + skip,
state->msg, chunk);
return ret ?: chunk;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| hannes frederic sowa | hannes frederic sowa | 53 | 100.00% | 1 | 100.00% |
| Total | 53 | 100.00% | 1 | 100.00% |
static int unix_stream_recvmsg(struct socket *sock, struct msghdr *msg,
size_t size, int flags)
{
struct unix_stream_read_state state = {
.recv_actor = unix_stream_read_actor,
.socket = sock,
.msg = msg,
.size = size,
.flags = flags
};
return unix_stream_read_generic(&state);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| hannes frederic sowa | hannes frederic sowa | 60 | 100.00% | 1 | 100.00% |
| Total | 60 | 100.00% | 1 | 100.00% |
static ssize_t skb_unix_socket_splice(struct sock *sk,
struct pipe_inode_info *pipe,
struct splice_pipe_desc *spd)
{
int ret;
struct unix_sock *u = unix_sk(sk);
mutex_unlock(&u->readlock);
ret = splice_to_pipe(pipe, spd);
mutex_lock(&u->readlock);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| hannes frederic sowa | hannes frederic sowa | 62 | 100.00% | 1 | 100.00% |
| Total | 62 | 100.00% | 1 | 100.00% |
static int unix_stream_splice_actor(struct sk_buff *skb,
int skip, int chunk,
struct unix_stream_read_state *state)
{
return skb_splice_bits(skb, state->socket->sk,
UNIXCB(skb).consumed + skip,
state->pipe, chunk, state->splice_flags,
skb_unix_socket_splice);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| hannes frederic sowa | hannes frederic sowa | 55 | 100.00% | 1 | 100.00% |
| Total | 55 | 100.00% | 1 | 100.00% |
static ssize_t unix_stream_splice_read(struct socket *sock, loff_t *ppos,
struct pipe_inode_info *pipe,
size_t size, unsigned int flags)
{
struct unix_stream_read_state state = {
.recv_actor = unix_stream_splice_actor,
.socket = sock,
.pipe = pipe,
.size = size,
.splice_flags = flags,
};
if (unlikely(*ppos))
return -ESPIPE;
if (sock->file->f_flags & O_NONBLOCK ||
flags & SPLICE_F_NONBLOCK)
state.flags = MSG_DONTWAIT;
return unix_stream_read_generic(&state);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| hannes frederic sowa | hannes frederic sowa | 97 | 100.00% | 1 | 100.00% |
| Total | 97 | 100.00% | 1 | 100.00% |
static int unix_shutdown(struct socket *sock, int mode)
{
struct sock *sk = sock->sk;
struct sock *other;
if (mode < SHUT_RD || mode > SHUT_RDWR)
return -EINVAL;
/* This maps:
* SHUT_RD (0) -> RCV_SHUTDOWN (1)
* SHUT_WR (1) -> SEND_SHUTDOWN (2)
* SHUT_RDWR (2) -> SHUTDOWN_MASK (3)
*/
++mode;
unix_state_lock(sk);
sk->sk_shutdown |= mode;
other = unix_peer(sk);
if (other)
sock_hold(other);
unix_state_unlock(sk);
sk->sk_state_change(sk);
if (other &&
(sk->sk_type == SOCK_STREAM || sk->sk_type == SOCK_SEQPACKET)) {
int peer_mode = 0;
if (mode&RCV_SHUTDOWN)
peer_mode |= SEND_SHUTDOWN;
if (mode&SEND_SHUTDOWN)
peer_mode |= RCV_SHUTDOWN;
unix_state_lock(other);
other->sk_shutdown |= peer_mode;
unix_state_unlock(other);
other->sk_state_change(other);
if (peer_mode == SHUTDOWN_MASK)
sk_wake_async(other, SOCK_WAKE_WAITD, POLL_HUP);
else if (peer_mode & RCV_SHUTDOWN)
sk_wake_async(other, SOCK_WAKE_WAITD, POLL_IN);
}
if (other)
sock_put(other);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| david s. miller | david s. miller | 130 | 66.33% | 2 | 25.00% |
| pre-git | pre-git | 49 | 25.00% | 2 | 25.00% |
| xi wang | xi wang | 12 | 6.12% | 1 | 12.50% |
| alban crequy | alban crequy | 2 | 1.02% | 1 | 12.50% |
| pavel emelianov | pavel emelianov | 2 | 1.02% | 1 | 12.50% |
| arnaldo carvalho de melo | arnaldo carvalho de melo | 1 | 0.51% | 1 | 12.50% |
| Total | 196 | 100.00% | 8 | 100.00% |
long unix_inq_len(struct sock *sk)
{
struct sk_buff *skb;
long amount = 0;
if (sk->sk_state == TCP_LISTEN)
return -EINVAL;
spin_lock(&sk->sk_receive_queue.lock);
if (sk->sk_type == SOCK_STREAM ||
sk->sk_type == SOCK_SEQPACKET) {
skb_queue_walk(&sk->sk_receive_queue, skb)
amount += unix_skb_len(skb);
} else {
skb = skb_peek(&sk->sk_receive_queue);
if (skb)
amount = skb->len;
}
spin_unlock(&sk->sk_receive_queue.lock);
return amount;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| david s. miller | david s. miller | 72 | 67.29% | 2 | 25.00% |
| stephen hemminger | stephen hemminger | 13 | 12.15% | 1 | 12.50% |
| pavel emelianov | pavel emelianov | 12 | 11.21% | 1 | 12.50% |
| pre-git | pre-git | 6 | 5.61% | 2 | 25.00% |
| eric dumazet | eric dumazet | 3 | 2.80% | 1 | 12.50% |
| arnaldo carvalho de melo | arnaldo carvalho de melo | 1 | 0.93% | 1 | 12.50% |
| Total | 107 | 100.00% | 8 | 100.00% |
EXPORT_SYMBOL_GPL(unix_inq_len);
long unix_outq_len(struct sock *sk)
{
return sk_wmem_alloc_get(sk);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| pavel emelianov | pavel emelianov | 16 | 100.00% | 1 | 100.00% |
| Total | 16 | 100.00% | 1 | 100.00% |
EXPORT_SYMBOL_GPL(unix_outq_len);
static int unix_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
{
struct sock *sk = sock->sk;
long amount = 0;
int err;
switch (cmd) {
case SIOCOUTQ:
amount = unix_outq_len(sk);
err = put_user(amount, (int __user *)arg);
break;
case SIOCINQ:
amount = unix_inq_len(sk);
if (amount < 0)
err = amount;
else
err = put_user(amount, (int __user *)arg);
break;
default:
err = -ENOIOCTLCMD;
break;
}
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| pavel emelianov | pavel emelianov | 86 | 76.11% | 1 | 20.00% |
| david s. miller | david s. miller | 19 | 16.81% | 1 | 20.00% |
| stephen hemminger | stephen hemminger | 5 | 4.42% | 1 | 20.00% |
| christoph hellwig | christoph hellwig | 2 | 1.77% | 1 | 20.00% |
| al viro | al viro | 1 | 0.88% | 1 | 20.00% |
| Total | 113 | 100.00% | 5 | 100.00% |
static unsigned int unix_poll(struct file *file, struct socket *sock, poll_table *wait)
{
struct sock *sk = sock->sk;
unsigned int mask;
sock_poll_wait(file, sk_sleep(sk), wait);
mask = 0;
/* exceptional events? */
if (sk->sk_err)
mask |= POLLERR;
if (sk->sk_shutdown == SHUTDOWN_MASK)
mask |= POLLHUP;
if (sk->sk_shutdown & RCV_SHUTDOWN)
mask |= POLLRDHUP | POLLIN | POLLRDNORM;
/* readable? */
if (!skb_queue_empty(&sk->sk_receive_queue))
mask |= POLLIN | POLLRDNORM;
/* Connection-based need to check for termination and startup */
if ((sk->sk_type == SOCK_STREAM || sk->sk_type == SOCK_SEQPACKET) &&
sk->sk_state == TCP_CLOSE)
mask |= POLLHUP;
/*
* we set writable also when the other side has shut down the
* connection. This prevents stuck sockets.
*/
if (unix_writable(sk))
mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
return mask;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| david s. miller | david s. miller | 97 | 63.40% | 2 | 16.67% |
| pre-git | pre-git | 15 | 9.80% | 4 | 33.33% |
| stephen hemminger | stephen hemminger | 13 | 8.50% | 1 | 8.33% |
| davide libenzi | davide libenzi | 12 | 7.84% | 1 | 8.33% |
| hirofumi ogawa | hirofumi ogawa | 8 | 5.23% | 1 | 8.33% |
| eric dumazet | eric dumazet | 7 | 4.58% | 2 | 16.67% |
| jiri olsa | jiri olsa | 1 | 0.65% | 1 | 8.33% |
| Total | 153 | 100.00% | 12 | 100.00% |
static unsigned int unix_dgram_poll(struct file *file, struct socket *sock,
poll_table *wait)
{
struct sock *sk = sock->sk, *other;
unsigned int mask, writable;
sock_poll_wait(file, sk_sleep(sk), wait);
mask = 0;
/* exceptional events? */
if (sk->sk_err || !skb_queue_empty(&sk->sk_error_queue))
mask |= POLLERR |
(sock_flag(sk, SOCK_SELECT_ERR_QUEUE) ? POLLPRI : 0);
if (sk->sk_shutdown & RCV_SHUTDOWN)
mask |= POLLRDHUP | POLLIN | POLLRDNORM;
if (sk->sk_shutdown == SHUTDOWN_MASK)
mask |= POLLHUP;
/* readable? */
if (!skb_queue_empty(&sk->sk_receive_queue))
mask |= POLLIN | POLLRDNORM;
/* Connection-based need to check for termination and startup */
if (sk->sk_type == SOCK_SEQPACKET) {
if (sk->sk_state == TCP_CLOSE)
mask |= POLLHUP;
/* connection hasn't started yet? */
if (sk->sk_state == TCP_SYN_SENT)
return mask;
}
/* No write status requested, avoid expensive OUT tests. */
if (!(poll_requested_events(wait) & (POLLWRBAND|POLLWRNORM|POLLOUT)))
return mask;
writable = unix_writable(sk);
if (writable) {
unix_state_lock(sk);
other = unix_peer(sk);
if (other && unix_peer(other) != sk &&
unix_recvq_full(other) &&
unix_dgram_peer_wake_me(sk, other))
writable = 0;
unix_state_unlock(sk);
}
if (writable)
mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
else
sk_set_bit(SOCKWQ_ASYNC_NOSPACE, sk);
return mask;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| rainer weikusat | rainer weikusat | 226 | 83.39% | 3 | 27.27% |
| eric dumazet | eric dumazet | 28 | 10.33% | 4 | 36.36% |
| jacob e keller | jacob e keller | 13 | 4.80% | 2 | 18.18% |
| hans verkuil | hans verkuil | 3 | 1.11% | 1 | 9.09% |
| jiri olsa | jiri olsa | 1 | 0.37% | 1 | 9.09% |
| Total | 271 | 100.00% | 11 | 100.00% |
#ifdef CONFIG_PROC_FS
#define BUCKET_SPACE (BITS_PER_LONG - (UNIX_HASH_BITS + 1) - 1)
#define get_bucket(x) ((x) >> BUCKET_SPACE)
#define get_offset(x) ((x) & ((1L << BUCKET_SPACE) - 1))
#define set_bucket_offset(b, o) ((b) << BUCKET_SPACE | (o))
static struct sock *unix_from_bucket(struct seq_file *seq, loff_t *pos)
{
unsigned long offset = get_offset(*pos);
unsigned long bucket = get_bucket(*pos);
struct sock *sk;
unsigned long count = 0;
for (sk = sk_head(&unix_socket_table[bucket]); sk; sk = sk_next(sk)) {
if (sock_net(sk) != seq_file_net(seq))
continue;
if (++count == offset)
break;
}
return sk;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| eric dumazet | eric dumazet | 46 | 47.92% | 1 | 12.50% |
| david s. miller | david s. miller | 26 | 27.08% | 1 | 12.50% |
| hideaki yoshifuji | hideaki yoshifuji | 11 | 11.46% | 2 | 25.00% |
| denis v. lunev | denis v. lunev | 7 | 7.29% | 1 | 12.50% |
| stephen hemminger | stephen hemminger | 3 | 3.12% | 1 | 12.50% |
| hirofumi ogawa | hirofumi ogawa | 2 | 2.08% | 1 | 12.50% |
| pre-git | pre-git | 1 | 1.04% | 1 | 12.50% |
| Total | 96 | 100.00% | 8 | 100.00% |
static struct sock *unix_next_socket(struct seq_file *seq,
struct sock *sk,
loff_t *pos)
{
unsigned long bucket;
while (sk > (struct sock *)SEQ_START_TOKEN) {
sk = sk_next(sk);
if (!sk)
goto next_bucket;
if (sock_net(sk) == seq_file_net(seq))
return sk;
}
do {
sk = unix_from_bucket(seq, pos);
if (sk)
return sk;
next_bucket:
bucket = get_bucket(*pos) + 1;
*pos = set_bucket_offset(bucket, 1);
} while (bucket < ARRAY_SIZE(unix_socket_table));
return NULL;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| eric dumazet | eric dumazet | 113 | 91.87% | 1 | 25.00% |
| david s. miller | david s. miller | 5 | 4.07% | 1 | 25.00% |
| stephen hemminger | stephen hemminger | 4 | 3.25% | 1 | 25.00% |
| pre-git | pre-git | 1 | 0.81% | 1 | 25.00% |
| Total | 123 | 100.00% | 4 | 100.00% |
static void *unix_seq_start(struct seq_file *seq, loff_t *pos)
__acquires
(unix_table_lock)
{
spin_lock(&unix_table_lock);
if (!*pos)
return SEQ_START_TOKEN;
if (get_bucket(*pos) >= ARRAY_SIZE(unix_socket_table))
return NULL;
return unix_next_socket(seq, NULL, pos);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| eric dumazet | eric dumazet | 30 | 49.18% | 2 | 33.33% |
| david s. miller | david s. miller | 22 | 36.07% | 2 | 33.33% |
| stephen hemminger | stephen hemminger | 8 | 13.11% | 1 | 16.67% |
| hideaki yoshifuji | hideaki yoshifuji | 1 | 1.64% | 1 | 16.67% |
| Total | 61 | 100.00% | 6 | 100.00% |
static void *unix_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
++*pos;
return unix_next_socket(seq, v, pos);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| david s. miller | david s. miller | 18 | 52.94% | 1 | 14.29% |
| stephen hemminger | stephen hemminger | 5 | 14.71% | 1 | 14.29% |
| eric dumazet | eric dumazet | 5 | 14.71% | 1 | 14.29% |
| denis v. lunev | denis v. lunev | 2 | 5.88% | 1 | 14.29% |
| hideaki yoshifuji | hideaki yoshifuji | 2 | 5.88% | 1 | 14.29% |
| pre-git | pre-git | 2 | 5.88% | 2 | 28.57% |
| Total | 34 | 100.00% | 7 | 100.00% |
static void unix_seq_stop(struct seq_file *seq, void *v)
__releases
(unix_table_lock)
{
spin_unlock(&unix_table_lock);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| david s. miller | david s. miller | 18 | 72.00% | 2 | 40.00% |
| eric dumazet | eric dumazet | 4 | 16.00% | 1 | 20.00% |
| stephen hemminger | stephen hemminger | 2 | 8.00% | 1 | 20.00% |
| pre-git | pre-git | 1 | 4.00% | 1 | 20.00% |
| Total | 25 | 100.00% | 5 | 100.00% |
static int unix_seq_show(struct seq_file *seq, void *v)
{
if (v == SEQ_START_TOKEN)
seq_puts(seq, "Num RefCount Protocol Flags Type St "
"Inode Path\n");
else {
struct sock *s = v;
struct unix_sock *u = unix_sk(s);
unix_state_lock(s);
seq_printf(seq, "%pK: %08X %08X %08X %04X %02X %5lu",
s,
atomic_read(&s->sk_refcnt),
0,
s->sk_state == TCP_LISTEN ? __SO_ACCEPTCON : 0,
s->sk_type,
s->sk_socket ?
(s->sk_state == TCP_ESTABLISHED ? SS_CONNECTED : SS_UNCONNECTED) :
(s->sk_state == TCP_ESTABLISHED ? SS_CONNECTING : SS_DISCONNECTING),
sock_i_ino(s));
if (u->addr) {
int i, len;
seq_putc(seq, ' ');
i = 0;
len = u->addr->len - sizeof(short);
if (!UNIX_ABSTRACT(s))
len--;
else {
seq_putc(seq, '@');
i++;
}
for ( ; i < len; i++)
seq_putc(seq, u->addr->name->sun_path[i]);
}
unix_state_unlock(s);
seq_putc(seq, '\n');
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| david s. miller | david s. miller | 214 | 96.40% | 2 | 33.33% |
| pre-git | pre-git | 4 | 1.80% | 1 | 16.67% |
| rusty russell | rusty russell | 2 | 0.90% | 1 | 16.67% |
| dan rosenberg | dan rosenberg | 1 | 0.45% | 1 | 16.67% |
| joe perches | joe perches | 1 | 0.45% | 1 | 16.67% |
| Total | 222 | 100.00% | 6 | 100.00% |
static const struct seq_operations unix_seq_ops = {
.start = unix_seq_start,
.next = unix_seq_next,
.stop = unix_seq_stop,
.show = unix_seq_show,
};
static int unix_seq_open(struct inode *inode, struct file *file)
{
return seq_open_net(inode, file, &unix_seq_ops,
sizeof(struct seq_net_private));
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| david s. miller | david s. miller | 22 | 66.67% | 1 | 20.00% |
| denis v. lunev | denis v. lunev | 7 | 21.21% | 2 | 40.00% |
| pavel emelianov | pavel emelianov | 3 | 9.09% | 1 | 20.00% |
| eric dumazet | eric dumazet | 1 | 3.03% | 1 | 20.00% |
| Total | 33 | 100.00% | 5 | 100.00% |
static const struct file_operations unix_seq_fops = {
.owner = THIS_MODULE,
.open = unix_seq_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release_net,
};
#endif
static const struct net_proto_family unix_family_ops = {
.family = PF_UNIX,
.create = unix_create,
.owner = THIS_MODULE,
};
static int __net_init unix_net_init(struct net *net)
{
int error = -ENOMEM;
net->unx.sysctl_max_dgram_qlen = 10;
if (unix_sysctl_register(net))
goto out;
#ifdef CONFIG_PROC_FS
if (!proc_create("unix", 0, net->proc_net, &unix_seq_fops)) {
unix_sysctl_unregister(net);
goto out;
}
#endif
error = 0;
out:
return error;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| denis v. lunev | denis v. lunev | 48 | 62.34% | 2 | 28.57% |
| pavel emelianov | pavel emelianov | 22 | 28.57% | 2 | 28.57% |
| gao feng | gao feng | 5 | 6.49% | 1 | 14.29% |
| jianjun kong | jianjun kong | 1 | 1.30% | 1 | 14.29% |
| alexey dobriyan | alexey dobriyan | 1 | 1.30% | 1 | 14.29% |
| Total | 77 | 100.00% | 7 | 100.00% |
static void __net_exit unix_net_exit(struct net *net)
{
unix_sysctl_unregister(net);
remove_proc_entry("unix", net->proc_net);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| denis v. lunev | denis v. lunev | 15 | 57.69% | 1 | 25.00% |
| gao feng | gao feng | 5 | 19.23% | 1 | 25.00% |
| pavel emelianov | pavel emelianov | 5 | 19.23% | 1 | 25.00% |
| alexey dobriyan | alexey dobriyan | 1 | 3.85% | 1 | 25.00% |
| Total | 26 | 100.00% | 4 | 100.00% |
static struct pernet_operations unix_net_ops = {
.init = unix_net_init,
.exit = unix_net_exit,
};
static int __init af_unix_init(void)
{
int rc = -1;
BUILD_BUG_ON(sizeof(struct unix_skb_parms) > FIELD_SIZEOF(struct sk_buff, cb));
rc = proto_register(&unix_proto, 1);
if (rc != 0) {
pr_crit("%s: Cannot create unix_sock SLAB cache!\n", __func__);
goto out;
}
sock_register(&unix_family_ops);
register_pernet_subsys(&unix_net_ops);
out:
return rc;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| pre-git | pre-git | 31 | 40.26% | 8 | 47.06% |
| arnaldo carvalho de melo | arnaldo carvalho de melo | 24 | 31.17% | 1 | 5.88% |
| david s. miller | david s. miller | 11 | 14.29% | 2 | 11.76% |
| hideaki yoshifuji | hideaki yoshifuji | 6 | 7.79% | 2 | 11.76% |
| denis v. lunev | denis v. lunev | 2 | 2.60% | 1 | 5.88% |
| eric w. biederman | eric w. biederman | 1 | 1.30% | 1 | 5.88% |
| wang weidong | wang weidong | 1 | 1.30% | 1 | 5.88% |
| harvey harrison | harvey harrison | 1 | 1.30% | 1 | 5.88% |
| Total | 77 | 100.00% | 17 | 100.00% |
static void __exit af_unix_exit(void)
{
sock_unregister(PF_UNIX);
proto_unregister(&unix_proto);
unregister_pernet_subsys(&unix_net_ops);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| pre-git | pre-git | 17 | 65.38% | 5 | 55.56% |
| denis v. lunev | denis v. lunev | 4 | 15.38% | 1 | 11.11% |
| david s. miller | david s. miller | 3 | 11.54% | 1 | 11.11% |
| arnaldo carvalho de melo | arnaldo carvalho de melo | 1 | 3.85% | 1 | 11.11% |
| eric w. biederman | eric w. biederman | 1 | 3.85% | 1 | 11.11% |
| Total | 26 | 100.00% | 9 | 100.00% |
/* Earlier than device_initcall() so that other drivers invoking
request_module() don't end up in a loop when modprobe tries
to use a UNIX socket. But later than subsys_initcall() because
we depend on stuff initialised there */
fs_initcall(af_unix_init);
module_exit(af_unix_exit);
MODULE_LICENSE("GPL");
MODULE_ALIAS_NETPROTO(PF_UNIX);
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| pre-git | pre-git | 4815 | 36.59% | 57 | 21.03% |
| david s. miller | david s. miller | 2080 | 15.81% | 18 | 6.64% |
| hannes frederic sowa | hannes frederic sowa | 1334 | 10.14% | 7 | 2.58% |
| rainer weikusat | rainer weikusat | 1021 | 7.76% | 11 | 4.06% |
| eric dumazet | eric dumazet | 906 | 6.89% | 28 | 10.33% |
| eric w. biederman | eric w. biederman | 431 | 3.28% | 8 | 2.95% |
| pavel emelianov | pavel emelianov | 346 | 2.63% | 11 | 4.06% |
| arnaldo carvalho de melo | arnaldo carvalho de melo | 260 | 1.98% | 9 | 3.32% |
| al viro | al viro | 223 | 1.69% | 16 | 5.90% |
| james morris | james morris | 180 | 1.37% | 4 | 1.48% |
| denis v. lunev | denis v. lunev | 176 | 1.34% | 3 | 1.11% |
| benjamin lahaise | benjamin lahaise | 129 | 0.98% | 4 | 1.48% |
| miklos szeredi | miklos szeredi | 108 | 0.82% | 5 | 1.85% |
| catherine zhang | catherine zhang | 94 | 0.71% | 2 | 0.74% |
| stephen d. smalley | stephen d. smalley | 76 | 0.58% | 1 | 0.37% |
| daniel borkmann | daniel borkmann | 68 | 0.52% | 1 | 0.37% |
| linus torvalds | linus torvalds | 65 | 0.49% | 5 | 1.85% |
| willy tarreau | willy tarreau | 64 | 0.49% | 1 | 0.37% |
| stephen hemminger | stephen hemminger | 62 | 0.47% | 4 | 1.48% |
| alban crequy | alban crequy | 55 | 0.42% | 3 | 1.11% |
| aaron conole | aaron conole | 49 | 0.37% | 1 | 0.37% |
| hideaki yoshifuji | hideaki yoshifuji | 47 | 0.36% | 6 | 2.21% |
| florian zumbiehl | florian zumbiehl | 38 | 0.29% | 1 | 0.37% |
| christoph hellwig | christoph hellwig | 34 | 0.26% | 4 | 1.48% |
| ingo molnar | ingo molnar | 34 | 0.26% | 2 | 0.74% |
| steven dake | steven dake | 33 | 0.25% | 1 | 0.37% |
| solar designer | solar designer | 32 | 0.24% | 1 | 0.37% |
| sasha levin | sasha levin | 31 | 0.24% | 2 | 0.74% |
| kirill tkhai | kirill tkhai | 30 | 0.23% | 1 | 0.37% |
| tetsuo handa | tetsuo handa | 29 | 0.22% | 1 | 0.37% |
| benjamin poirier | benjamin poirier | 26 | 0.20% | 1 | 0.37% |
| rusty russell | rusty russell | 25 | 0.19% | 2 | 0.74% |
| andrey vagin | andrey vagin | 22 | 0.17% | 1 | 0.37% |
| herbert poetzl | herbert poetzl | 21 | 0.16% | 1 | 0.37% |
| david howells | david howells | 16 | 0.12% | 3 | 1.11% |
| andrew morton | andrew morton | 13 | 0.10% | 2 | 0.74% |
| jacob e keller | jacob e keller | 13 | 0.10% | 2 | 0.74% |
| xi wang | xi wang | 12 | 0.09% | 1 | 0.37% |
| davide libenzi | davide libenzi | 12 | 0.09% | 1 | 0.37% |
| tomoki sekiyama | tomoki sekiyama | 11 | 0.08% | 1 | 0.37% |
| hirofumi ogawa | hirofumi ogawa | 10 | 0.08% | 1 | 0.37% |
| gao feng | gao feng | 10 | 0.08% | 2 | 0.74% |
| dave hansen | dave hansen | 10 | 0.08% | 1 | 0.37% |
| wang weidong | wang weidong | 10 | 0.08% | 1 | 0.37% |
| kentaro takeda | kentaro takeda | 9 | 0.07% | 1 | 0.37% |
| steffen hurrle | steffen hurrle | 8 | 0.06% | 1 | 0.37% |
| paul moore | paul moore | 8 | 0.06% | 1 | 0.37% |
| cyrill gorcunov | cyrill gorcunov | 7 | 0.05% | 1 | 0.37% |
| ray lee | ray lee | 7 | 0.05% | 1 | 0.37% |
| dann frazier | dann frazier | 6 | 0.05% | 1 | 0.37% |
| jan blunck | jan blunck | 6 | 0.05% | 2 | 0.74% |
| ilpo jarvinen | ilpo jarvinen | 6 | 0.05% | 1 | 0.37% |
| colin cross | colin cross | 4 | 0.03% | 1 | 0.37% |
| anton blanchard | anton blanchard | 3 | 0.02% | 1 | 0.37% |
| hans verkuil | hans verkuil | 3 | 0.02% | 1 | 0.37% |
| greg kroah-hartman | greg kroah-hartman | 3 | 0.02% | 1 | 0.37% |
| eric paris | eric paris | 3 | 0.02% | 1 | 0.37% |
| thomas gleixner | thomas gleixner | 3 | 0.02% | 1 | 0.37% |
| alan cox | alan cox | 2 | 0.02% | 2 | 0.74% |
| david woodhouse | david woodhouse | 2 | 0.02% | 1 | 0.37% |
| jiri olsa | jiri olsa | 2 | 0.02% | 1 | 0.37% |
| alexey dobriyan | alexey dobriyan | 2 | 0.02% | 1 | 0.37% |
| dipankar sarma | dipankar sarma | 2 | 0.02% | 1 | 0.37% |
| daniel baluta | daniel baluta | 1 | 0.01% | 1 | 0.37% |
| herbert xu | herbert xu | 1 | 0.01% | 1 | 0.37% |
| jianjun kong | jianjun kong | 1 | 0.01% | 1 | 0.37% |
| lucas de marchi | lucas de marchi | 1 | 0.01% | 1 | 0.37% |
| peter zijlstra | peter zijlstra | 1 | 0.01% | 1 | 0.37% |
| arjan van de ven | arjan van de ven | 1 | 0.01% | 1 | 0.37% |
| neil horman | neil horman | 1 | 0.01% | 1 | 0.37% |
| panagiotis issaris* | panagiotis issaris* | 1 | 0.01% | 1 | 0.37% |
| joe perches | joe perches | 1 | 0.01% | 1 | 0.37% |
| philippe de muyter | philippe de muyter | 1 | 0.01% | 1 | 0.37% |
| dan rosenberg | dan rosenberg | 1 | 0.01% | 1 | 0.37% |
| harvey harrison | harvey harrison | 1 | 0.01% | 1 | 0.37% |
| Total | 13159 | 100.00% | 271 | 100.00% |
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