[rtems-libbsd commit] UNIX(4): Import from FreeBSD
Sebastian Huber
sebh at rtems.org
Thu Jan 16 14:39:44 UTC 2014
Module: rtems-libbsd
Branch: master
Commit: 164c5f5320b0a4c82ab17e4c90f9ae878a741d36
Changeset: http://git.rtems.org/rtems-libbsd/commit/?id=164c5f5320b0a4c82ab17e4c90f9ae878a741d36
Author: Sebastian Huber <sebastian.huber at embedded-brains.de>
Date: Wed Jan 15 12:46:22 2014 +0100
UNIX(4): Import from FreeBSD
---
Makefile | 13 +
freebsd-to-rtems.py | 2 +
freebsd/sys/kern/uipc_usrreq.c | 2643 ++++++++++++++++++++
freebsd/sys/sys/kernel.h | 2 +
freebsd/sys/sys/unpcb.h | 4 +
libbsd.txt | 4 +
rtemsbsd/include/machine/rtems-bsd-sysinit.h | 3 +
testsuite/include/rtems/bsd/test/default-init.h | 2 +
.../include/rtems/bsd/test/default-network-init.h | 4 +
testsuite/syscalls01/test_main.c | 4 +-
testsuite/unix01/test_main.c | 251 ++
11 files changed, 2931 insertions(+), 1 deletions(-)
diff --git a/Makefile b/Makefile
index 97b55d3..618c5c5 100644
--- a/Makefile
+++ b/Makefile
@@ -157,6 +157,7 @@ LIB_C_FILES += freebsd/sys/kern/uipc_mbuf2.c
LIB_C_FILES += freebsd/sys/kern/uipc_mbuf.c
LIB_C_FILES += freebsd/sys/kern/uipc_sockbuf.c
LIB_C_FILES += freebsd/sys/kern/uipc_socket.c
+LIB_C_FILES += freebsd/sys/kern/uipc_usrreq.c
LIB_C_FILES += freebsd/sys/libkern/arc4random.c
LIB_C_FILES += freebsd/sys/libkern/fls.c
LIB_C_FILES += freebsd/sys/libkern/inet_ntoa.c
@@ -1102,6 +1103,18 @@ LIB_C_FILES += freebsd/usr.bin/netstat/unix.c
freebsd/usr.bin/netstat/unix.o: freebsd/usr.bin/netstat/unix.c
$(CC) $(CPPFLAGS) $(CFLAGS) -DINET6 -c $< -o $@
+TEST_UNIX01 = testsuite/unix01/unix01.exe
+TEST_UNIX01_O_FILES =
+TEST_UNIX01_D_FILES =
+TEST_UNIX01_O_FILES += testsuite/unix01/test_main.o
+TEST_UNIX01_D_FILES += testsuite/unix01/test_main.d
+$(TEST_UNIX01): $(TEST_UNIX01_O_FILES) $(LIB)
+ $(LINK.c) -Wl,-Map,testsuite/unix01/unix01.map $^ -lm -lz -o $@
+TESTS += $(TEST_UNIX01)
+O_FILES += $(TEST_UNIX01_O_FILES)
+D_FILES += $(TEST_UNIX01_D_FILES)
+RUN_TESTS += $(TEST_UNIX01)
+
TEST_FTPD01 = testsuite/ftpd01/ftpd01.exe
TEST_FTPD01_O_FILES =
TEST_FTPD01_D_FILES =
diff --git a/freebsd-to-rtems.py b/freebsd-to-rtems.py
index ab9579a..df92583 100755
--- a/freebsd-to-rtems.py
+++ b/freebsd-to-rtems.py
@@ -854,6 +854,7 @@ base.addKernelSpaceSourceFiles(
'sys/kern/uipc_mbuf.c',
'sys/kern/uipc_sockbuf.c',
'sys/kern/uipc_socket.c',
+ 'sys/kern/uipc_usrreq.c',
'sys/libkern/arc4random.c',
'sys/libkern/fls.c',
'sys/libkern/inet_ntoa.c',
@@ -2426,6 +2427,7 @@ in_cksum.addCPUDependentSourceFiles(
)
tests = Module('tests')
+tests.addTest('unix01', ['test_main'])
tests.addTest('ftpd01', ['test_main'], netTest = True)
tests.addTest('ping01', ['test_main'], netTest = True)
tests.addTest('selectpollkqueue01', ['test_main'])
diff --git a/freebsd/sys/kern/uipc_usrreq.c b/freebsd/sys/kern/uipc_usrreq.c
new file mode 100644
index 0000000..eacfc71
--- /dev/null
+++ b/freebsd/sys/kern/uipc_usrreq.c
@@ -0,0 +1,2643 @@
+#include <machine/rtems-bsd-kernel-space.h>
+
+/*-
+ * Copyright (c) 1982, 1986, 1989, 1991, 1993
+ * The Regents of the University of California.
+ * Copyright (c) 2004-2009 Robert N. M. Watson
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * From: @(#)uipc_usrreq.c 8.3 (Berkeley) 1/4/94
+ */
+
+/*
+ * UNIX Domain (Local) Sockets
+ *
+ * This is an implementation of UNIX (local) domain sockets. Each socket has
+ * an associated struct unpcb (UNIX protocol control block). Stream sockets
+ * may be connected to 0 or 1 other socket. Datagram sockets may be
+ * connected to 0, 1, or many other sockets. Sockets may be created and
+ * connected in pairs (socketpair(2)), or bound/connected to using the file
+ * system name space. For most purposes, only the receive socket buffer is
+ * used, as sending on one socket delivers directly to the receive socket
+ * buffer of a second socket.
+ *
+ * The implementation is substantially complicated by the fact that
+ * "ancillary data", such as file descriptors or credentials, may be passed
+ * across UNIX domain sockets. The potential for passing UNIX domain sockets
+ * over other UNIX domain sockets requires the implementation of a simple
+ * garbage collector to find and tear down cycles of disconnected sockets.
+ *
+ * TODO:
+ * RDM
+ * distinguish datagram size limits from flow control limits in SEQPACKET
+ * rethink name space problems
+ * need a proper out-of-band
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <rtems/bsd/local/opt_ddb.h>
+
+#include <rtems/bsd/sys/param.h>
+#include <sys/domain.h>
+#include <sys/fcntl.h>
+#include <sys/malloc.h> /* XXX must be before <sys/file.h> */
+#include <sys/eventhandler.h>
+#include <sys/file.h>
+#include <sys/filedesc.h>
+#include <sys/kernel.h>
+#include <rtems/bsd/sys/lock.h>
+#include <sys/mbuf.h>
+#include <sys/mount.h>
+#include <sys/mutex.h>
+#include <sys/namei.h>
+#include <sys/proc.h>
+#include <sys/protosw.h>
+#include <sys/queue.h>
+#include <sys/resourcevar.h>
+#include <sys/rwlock.h>
+#include <sys/socket.h>
+#include <sys/socketvar.h>
+#include <sys/signalvar.h>
+#include <sys/stat.h>
+#include <sys/sx.h>
+#include <sys/sysctl.h>
+#include <sys/systm.h>
+#include <sys/taskqueue.h>
+#include <sys/un.h>
+#include <sys/unpcb.h>
+#include <sys/vnode.h>
+
+#include <net/vnet.h>
+
+#ifdef DDB
+#include <ddb/ddb.h>
+#endif
+
+#include <security/mac/mac_framework.h>
+
+#include <vm/uma.h>
+#ifdef __rtems__
+#include <rtems/imfs.h>
+#endif /* __rtems__ */
+
+/*
+ * Locking key:
+ * (l) Locked using list lock
+ * (g) Locked using linkage lock
+ */
+
+static uma_zone_t unp_zone;
+static unp_gen_t unp_gencnt; /* (l) */
+static u_int unp_count; /* (l) Count of local sockets. */
+static ino_t unp_ino; /* Prototype for fake inode numbers. */
+#ifndef __rtems__
+static int unp_rights; /* (g) File descriptors in flight. */
+#endif /* __rtems__ */
+static struct unp_head unp_shead; /* (l) List of stream sockets. */
+static struct unp_head unp_dhead; /* (l) List of datagram sockets. */
+static struct unp_head unp_sphead; /* (l) List of seqpacket sockets. */
+
+struct unp_defer {
+ SLIST_ENTRY(unp_defer) ud_link;
+ struct file *ud_fp;
+};
+#ifndef __rtems__
+static SLIST_HEAD(, unp_defer) unp_defers;
+static int unp_defers_count;
+#endif /* __rtems__ */
+
+static const struct sockaddr sun_noname = { sizeof(sun_noname), AF_LOCAL };
+
+#ifndef __rtems__
+/*
+ * Garbage collection of cyclic file descriptor/socket references occurs
+ * asynchronously in a taskqueue context in order to avoid recursion and
+ * reentrance in the UNIX domain socket, file descriptor, and socket layer
+ * code. See unp_gc() for a full description.
+ */
+static struct timeout_task unp_gc_task;
+
+/*
+ * The close of unix domain sockets attached as SCM_RIGHTS is
+ * postponed to the taskqueue, to avoid arbitrary recursion depth.
+ * The attached sockets might have another sockets attached.
+ */
+static struct task unp_defer_task;
+#endif /* __rtems__ */
+
+/*
+ * Both send and receive buffers are allocated PIPSIZ bytes of buffering for
+ * stream sockets, although the total for sender and receiver is actually
+ * only PIPSIZ.
+ *
+ * Datagram sockets really use the sendspace as the maximum datagram size,
+ * and don't really want to reserve the sendspace. Their recvspace should be
+ * large enough for at least one max-size datagram plus address.
+ */
+#ifndef PIPSIZ
+#define PIPSIZ 8192
+#endif
+static u_long unpst_sendspace = PIPSIZ;
+static u_long unpst_recvspace = PIPSIZ;
+static u_long unpdg_sendspace = 2*1024; /* really max datagram size */
+static u_long unpdg_recvspace = 4*1024;
+static u_long unpsp_sendspace = PIPSIZ; /* really max datagram size */
+static u_long unpsp_recvspace = PIPSIZ;
+
+static SYSCTL_NODE(_net, PF_LOCAL, local, CTLFLAG_RW, 0, "Local domain");
+static SYSCTL_NODE(_net_local, SOCK_STREAM, stream, CTLFLAG_RW, 0,
+ "SOCK_STREAM");
+static SYSCTL_NODE(_net_local, SOCK_DGRAM, dgram, CTLFLAG_RW, 0, "SOCK_DGRAM");
+static SYSCTL_NODE(_net_local, SOCK_SEQPACKET, seqpacket, CTLFLAG_RW, 0,
+ "SOCK_SEQPACKET");
+
+SYSCTL_ULONG(_net_local_stream, OID_AUTO, sendspace, CTLFLAG_RW,
+ &unpst_sendspace, 0, "Default stream send space.");
+SYSCTL_ULONG(_net_local_stream, OID_AUTO, recvspace, CTLFLAG_RW,
+ &unpst_recvspace, 0, "Default stream receive space.");
+SYSCTL_ULONG(_net_local_dgram, OID_AUTO, maxdgram, CTLFLAG_RW,
+ &unpdg_sendspace, 0, "Default datagram send space.");
+SYSCTL_ULONG(_net_local_dgram, OID_AUTO, recvspace, CTLFLAG_RW,
+ &unpdg_recvspace, 0, "Default datagram receive space.");
+SYSCTL_ULONG(_net_local_seqpacket, OID_AUTO, maxseqpacket, CTLFLAG_RW,
+ &unpsp_sendspace, 0, "Default seqpacket send space.");
+SYSCTL_ULONG(_net_local_seqpacket, OID_AUTO, recvspace, CTLFLAG_RW,
+ &unpsp_recvspace, 0, "Default seqpacket receive space.");
+#ifndef __rtems__
+SYSCTL_INT(_net_local, OID_AUTO, inflight, CTLFLAG_RD, &unp_rights, 0,
+ "File descriptors in flight.");
+SYSCTL_INT(_net_local, OID_AUTO, deferred, CTLFLAG_RD,
+ &unp_defers_count, 0,
+ "File descriptors deferred to taskqueue for close.");
+#endif /* __rtems__ */
+
+/*
+ * Locking and synchronization:
+ *
+ * Three types of locks exit in the local domain socket implementation: a
+ * global list mutex, a global linkage rwlock, and per-unpcb mutexes. Of the
+ * global locks, the list lock protects the socket count, global generation
+ * number, and stream/datagram global lists. The linkage lock protects the
+ * interconnection of unpcbs, the v_socket and unp_vnode pointers, and can be
+ * held exclusively over the acquisition of multiple unpcb locks to prevent
+ * deadlock.
+ *
+ * UNIX domain sockets each have an unpcb hung off of their so_pcb pointer,
+ * allocated in pru_attach() and freed in pru_detach(). The validity of that
+ * pointer is an invariant, so no lock is required to dereference the so_pcb
+ * pointer if a valid socket reference is held by the caller. In practice,
+ * this is always true during operations performed on a socket. Each unpcb
+ * has a back-pointer to its socket, unp_socket, which will be stable under
+ * the same circumstances.
+ *
+ * This pointer may only be safely dereferenced as long as a valid reference
+ * to the unpcb is held. Typically, this reference will be from the socket,
+ * or from another unpcb when the referring unpcb's lock is held (in order
+ * that the reference not be invalidated during use). For example, to follow
+ * unp->unp_conn->unp_socket, you need unlock the lock on unp, not unp_conn,
+ * as unp_socket remains valid as long as the reference to unp_conn is valid.
+ *
+ * Fields of unpcbss are locked using a per-unpcb lock, unp_mtx. Individual
+ * atomic reads without the lock may be performed "lockless", but more
+ * complex reads and read-modify-writes require the mutex to be held. No
+ * lock order is defined between unpcb locks -- multiple unpcb locks may be
+ * acquired at the same time only when holding the linkage rwlock
+ * exclusively, which prevents deadlocks.
+ *
+ * Blocking with UNIX domain sockets is a tricky issue: unlike most network
+ * protocols, bind() is a non-atomic operation, and connect() requires
+ * potential sleeping in the protocol, due to potentially waiting on local or
+ * distributed file systems. We try to separate "lookup" operations, which
+ * may sleep, and the IPC operations themselves, which typically can occur
+ * with relative atomicity as locks can be held over the entire operation.
+ *
+ * Another tricky issue is simultaneous multi-threaded or multi-process
+ * access to a single UNIX domain socket. These are handled by the flags
+ * UNP_CONNECTING and UNP_BINDING, which prevent concurrent connecting or
+ * binding, both of which involve dropping UNIX domain socket locks in order
+ * to perform namei() and other file system operations.
+ */
+static struct rwlock unp_link_rwlock;
+static struct mtx unp_list_lock;
+static struct mtx unp_defers_lock;
+
+#define UNP_LINK_LOCK_INIT() rw_init(&unp_link_rwlock, \
+ "unp_link_rwlock")
+
+#define UNP_LINK_LOCK_ASSERT() rw_assert(&unp_link_rwlock, \
+ RA_LOCKED)
+#define UNP_LINK_UNLOCK_ASSERT() rw_assert(&unp_link_rwlock, \
+ RA_UNLOCKED)
+
+#define UNP_LINK_RLOCK() rw_rlock(&unp_link_rwlock)
+#define UNP_LINK_RUNLOCK() rw_runlock(&unp_link_rwlock)
+#define UNP_LINK_WLOCK() rw_wlock(&unp_link_rwlock)
+#define UNP_LINK_WUNLOCK() rw_wunlock(&unp_link_rwlock)
+#define UNP_LINK_WLOCK_ASSERT() rw_assert(&unp_link_rwlock, \
+ RA_WLOCKED)
+
+#define UNP_LIST_LOCK_INIT() mtx_init(&unp_list_lock, \
+ "unp_list_lock", NULL, MTX_DEF)
+#define UNP_LIST_LOCK() mtx_lock(&unp_list_lock)
+#define UNP_LIST_UNLOCK() mtx_unlock(&unp_list_lock)
+
+#define UNP_DEFERRED_LOCK_INIT() mtx_init(&unp_defers_lock, \
+ "unp_defer", NULL, MTX_DEF)
+#define UNP_DEFERRED_LOCK() mtx_lock(&unp_defers_lock)
+#define UNP_DEFERRED_UNLOCK() mtx_unlock(&unp_defers_lock)
+
+#define UNP_PCB_LOCK_INIT(unp) mtx_init(&(unp)->unp_mtx, \
+ "unp_mtx", "unp_mtx", \
+ MTX_DUPOK|MTX_DEF|MTX_RECURSE)
+#define UNP_PCB_LOCK_DESTROY(unp) mtx_destroy(&(unp)->unp_mtx)
+#define UNP_PCB_LOCK(unp) mtx_lock(&(unp)->unp_mtx)
+#define UNP_PCB_UNLOCK(unp) mtx_unlock(&(unp)->unp_mtx)
+#define UNP_PCB_LOCK_ASSERT(unp) mtx_assert(&(unp)->unp_mtx, MA_OWNED)
+
+static int uipc_connect2(struct socket *, struct socket *);
+static int uipc_ctloutput(struct socket *, struct sockopt *);
+static int unp_connect(struct socket *, struct sockaddr *,
+ struct thread *);
+static int unp_connect2(struct socket *so, struct socket *so2, int);
+static void unp_disconnect(struct unpcb *unp, struct unpcb *unp2);
+#ifndef __rtems__
+static void unp_dispose(struct mbuf *);
+#endif /* __rtems__ */
+static void unp_shutdown(struct unpcb *);
+static void unp_drop(struct unpcb *, int);
+#ifndef __rtems__
+static void unp_gc(__unused void *, int);
+static void unp_scan(struct mbuf *, void (*)(struct file *));
+static void unp_discard(struct file *);
+static void unp_freerights(struct file **, int);
+#endif /* __rtems__ */
+static void unp_init(void);
+#ifndef __rtems__
+static int unp_internalize(struct mbuf **, struct thread *);
+static void unp_internalize_fp(struct file *);
+static int unp_externalize(struct mbuf *, struct mbuf **);
+static int unp_externalize_fp(struct file *);
+static struct mbuf *unp_addsockcred(struct thread *, struct mbuf *);
+static void unp_process_defers(void * __unused, int);
+#endif /* __rtems__ */
+
+/*
+ * Definitions of protocols supported in the LOCAL domain.
+ */
+static struct domain localdomain;
+static struct pr_usrreqs uipc_usrreqs_dgram, uipc_usrreqs_stream;
+static struct pr_usrreqs uipc_usrreqs_seqpacket;
+static struct protosw localsw[] = {
+{
+ .pr_type = SOCK_STREAM,
+ .pr_domain = &localdomain,
+ .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_RIGHTS,
+ .pr_ctloutput = &uipc_ctloutput,
+ .pr_usrreqs = &uipc_usrreqs_stream
+},
+{
+ .pr_type = SOCK_DGRAM,
+ .pr_domain = &localdomain,
+ .pr_flags = PR_ATOMIC|PR_ADDR|PR_RIGHTS,
+ .pr_ctloutput = &uipc_ctloutput,
+ .pr_usrreqs = &uipc_usrreqs_dgram
+},
+{
+ .pr_type = SOCK_SEQPACKET,
+ .pr_domain = &localdomain,
+
+ /*
+ * XXXRW: For now, PR_ADDR because soreceive will bump into them
+ * due to our use of sbappendaddr. A new sbappend variants is needed
+ * that supports both atomic record writes and control data.
+ */
+ .pr_flags = PR_ADDR|PR_ATOMIC|PR_CONNREQUIRED|PR_WANTRCVD|
+ PR_RIGHTS,
+ .pr_usrreqs = &uipc_usrreqs_seqpacket,
+},
+};
+
+static struct domain localdomain = {
+ .dom_family = AF_LOCAL,
+ .dom_name = "local",
+ .dom_init = unp_init,
+#ifndef __rtems__
+ .dom_externalize = unp_externalize,
+ .dom_dispose = unp_dispose,
+#endif /* __rtems__ */
+ .dom_protosw = localsw,
+ .dom_protoswNPROTOSW = &localsw[sizeof(localsw)/sizeof(localsw[0])]
+};
+DOMAIN_SET(local);
+
+static void
+uipc_abort(struct socket *so)
+{
+ struct unpcb *unp, *unp2;
+
+ unp = sotounpcb(so);
+ KASSERT(unp != NULL, ("uipc_abort: unp == NULL"));
+
+ UNP_LINK_WLOCK();
+ UNP_PCB_LOCK(unp);
+ unp2 = unp->unp_conn;
+ if (unp2 != NULL) {
+ UNP_PCB_LOCK(unp2);
+ unp_drop(unp2, ECONNABORTED);
+ UNP_PCB_UNLOCK(unp2);
+ }
+ UNP_PCB_UNLOCK(unp);
+ UNP_LINK_WUNLOCK();
+}
+
+static int
+uipc_accept(struct socket *so, struct sockaddr **nam)
+{
+ struct unpcb *unp, *unp2;
+ const struct sockaddr *sa;
+
+ /*
+ * Pass back name of connected socket, if it was bound and we are
+ * still connected (our peer may have closed already!).
+ */
+ unp = sotounpcb(so);
+ KASSERT(unp != NULL, ("uipc_accept: unp == NULL"));
+
+ *nam = malloc(sizeof(struct sockaddr_un), M_SONAME, M_WAITOK);
+ UNP_LINK_RLOCK();
+ unp2 = unp->unp_conn;
+ if (unp2 != NULL && unp2->unp_addr != NULL) {
+ UNP_PCB_LOCK(unp2);
+ sa = (struct sockaddr *) unp2->unp_addr;
+ bcopy(sa, *nam, sa->sa_len);
+ UNP_PCB_UNLOCK(unp2);
+ } else {
+ sa = &sun_noname;
+ bcopy(sa, *nam, sa->sa_len);
+ }
+ UNP_LINK_RUNLOCK();
+ return (0);
+}
+
+static int
+uipc_attach(struct socket *so, int proto, struct thread *td)
+{
+ u_long sendspace, recvspace;
+ struct unpcb *unp;
+ int error;
+
+ KASSERT(so->so_pcb == NULL, ("uipc_attach: so_pcb != NULL"));
+ if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
+ switch (so->so_type) {
+ case SOCK_STREAM:
+ sendspace = unpst_sendspace;
+ recvspace = unpst_recvspace;
+ break;
+
+ case SOCK_DGRAM:
+ sendspace = unpdg_sendspace;
+ recvspace = unpdg_recvspace;
+ break;
+
+ case SOCK_SEQPACKET:
+ sendspace = unpsp_sendspace;
+ recvspace = unpsp_recvspace;
+ break;
+
+ default:
+ panic("uipc_attach");
+ }
+ error = soreserve(so, sendspace, recvspace);
+ if (error)
+ return (error);
+ }
+ unp = uma_zalloc(unp_zone, M_NOWAIT | M_ZERO);
+ if (unp == NULL)
+ return (ENOBUFS);
+ LIST_INIT(&unp->unp_refs);
+ UNP_PCB_LOCK_INIT(unp);
+ unp->unp_socket = so;
+ so->so_pcb = unp;
+ unp->unp_refcount = 1;
+
+ UNP_LIST_LOCK();
+ unp->unp_gencnt = ++unp_gencnt;
+ unp_count++;
+ switch (so->so_type) {
+ case SOCK_STREAM:
+ LIST_INSERT_HEAD(&unp_shead, unp, unp_link);
+ break;
+
+ case SOCK_DGRAM:
+ LIST_INSERT_HEAD(&unp_dhead, unp, unp_link);
+ break;
+
+ case SOCK_SEQPACKET:
+ LIST_INSERT_HEAD(&unp_sphead, unp, unp_link);
+ break;
+
+ default:
+ panic("uipc_attach");
+ }
+ UNP_LIST_UNLOCK();
+
+ return (0);
+}
+
+#ifdef __rtems__
+static IMFS_jnode_t *
+rtems_uipc_imfs_initialize(IMFS_jnode_t *node, const IMFS_types_union *info)
+{
+ struct socket *so;
+ struct unpcb *unp;
+
+ node = IMFS_node_initialize_generic(node, info);
+
+ so = IMFS_generic_get_context_by_node(node);
+ unp = sotounpcb(so);
+
+ unp->unp_vnode = node;
+
+ return node;
+}
+
+static IMFS_jnode_t *
+rtems_uipc_imfs_destroy(IMFS_jnode_t *node)
+{
+ struct socket *so;
+ struct unpcb *unp;
+
+ so = IMFS_generic_get_context_by_node(node);
+ unp = sotounpcb(so);
+
+ unp->unp_vnode = NULL;
+
+ return node;
+}
+
+static const IMFS_node_control rtems_uipc_imfs_control = {
+ .imfs_type = IMFS_GENERIC,
+ .handlers = &socketops,
+ .node_initialize = rtems_uipc_imfs_initialize,
+ .node_remove = IMFS_node_remove_default,
+ .node_destroy = rtems_uipc_imfs_destroy
+};
+
+static const IMFS_node_control rtems_uipc_imfs_zombi_control = {
+ .imfs_type = IMFS_GENERIC,
+ .handlers = &rtems_filesystem_handlers_default,
+ .node_initialize = NULL,
+ .node_remove = IMFS_node_remove_default,
+ .node_destroy = IMFS_node_destroy_default
+};
+#endif /* __rtems__ */
+static int
+uipc_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
+{
+ struct sockaddr_un *soun = (struct sockaddr_un *)nam;
+#ifndef __rtems__
+ struct vattr vattr;
+ int error, namelen, vfslocked;
+ struct nameidata nd;
+ struct unpcb *unp;
+ struct vnode *vp;
+ struct mount *mp;
+ char *buf;
+#else /* __rtems__ */
+ int rv;
+ int error, namelen;
+ struct unpcb *unp;
+#endif /* __rtems__ */
+
+ unp = sotounpcb(so);
+ KASSERT(unp != NULL, ("uipc_bind: unp == NULL"));
+
+ if (soun->sun_len > sizeof(struct sockaddr_un))
+ return (EINVAL);
+ namelen = soun->sun_len - offsetof(struct sockaddr_un, sun_path);
+ if (namelen <= 0)
+ return (EINVAL);
+
+ /*
+ * We don't allow simultaneous bind() calls on a single UNIX domain
+ * socket, so flag in-progress operations, and return an error if an
+ * operation is already in progress.
+ *
+ * Historically, we have not allowed a socket to be rebound, so this
+ * also returns an error. Not allowing re-binding simplifies the
+ * implementation and avoids a great many possible failure modes.
+ */
+ UNP_PCB_LOCK(unp);
+ if (unp->unp_vnode != NULL) {
+ UNP_PCB_UNLOCK(unp);
+ return (EINVAL);
+ }
+ if (unp->unp_flags & UNP_BINDING) {
+ UNP_PCB_UNLOCK(unp);
+ return (EALREADY);
+ }
+ unp->unp_flags |= UNP_BINDING;
+ UNP_PCB_UNLOCK(unp);
+
+#ifndef __rtems__
+ buf = malloc(namelen + 1, M_TEMP, M_WAITOK);
+ bcopy(soun->sun_path, buf, namelen);
+ buf[namelen] = 0;
+
+restart:
+ vfslocked = 0;
+ NDINIT(&nd, CREATE, MPSAFE | NOFOLLOW | LOCKPARENT | SAVENAME,
+ UIO_SYSSPACE, buf, td);
+/* SHOULD BE ABLE TO ADOPT EXISTING AND wakeup() ALA FIFO's */
+ error = namei(&nd);
+ if (error)
+ goto error;
+ vp = nd.ni_vp;
+ vfslocked = NDHASGIANT(&nd);
+ if (vp != NULL || vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) {
+ NDFREE(&nd, NDF_ONLY_PNBUF);
+ if (nd.ni_dvp == vp)
+ vrele(nd.ni_dvp);
+ else
+ vput(nd.ni_dvp);
+ if (vp != NULL) {
+ vrele(vp);
+ error = EADDRINUSE;
+ goto error;
+ }
+ error = vn_start_write(NULL, &mp, V_XSLEEP | PCATCH);
+ if (error)
+ goto error;
+ VFS_UNLOCK_GIANT(vfslocked);
+ goto restart;
+ }
+ VATTR_NULL(&vattr);
+ vattr.va_type = VSOCK;
+ vattr.va_mode = (ACCESSPERMS & ~td->td_proc->p_fd->fd_cmask);
+#ifdef MAC
+ error = mac_vnode_check_create(td->td_ucred, nd.ni_dvp, &nd.ni_cnd,
+ &vattr);
+#endif
+ if (error == 0)
+ error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr);
+ NDFREE(&nd, NDF_ONLY_PNBUF);
+ vput(nd.ni_dvp);
+ if (error) {
+ vn_finished_write(mp);
+ goto error;
+ }
+ vp = nd.ni_vp;
+ ASSERT_VOP_ELOCKED(vp, "uipc_bind");
+#else /* __rtems__ */
+ soun->sun_path[namelen] = '\0';
+ rv = IMFS_make_generic_node(soun->sun_path,
+ S_IFSOCK | S_IRWXU | S_IRWXG | S_IRWXO,
+ &rtems_uipc_imfs_control, so);
+ if (rv != 0) {
+ error = errno;
+ goto error;
+ }
+#endif /* __rtems__ */
+ soun = (struct sockaddr_un *)sodupsockaddr(nam, M_WAITOK);
+
+ UNP_LINK_WLOCK();
+ UNP_PCB_LOCK(unp);
+#ifndef __rtems__
+ VOP_UNP_BIND(vp, unp->unp_socket);
+ unp->unp_vnode = vp;
+#endif /* __rtems__ */
+ unp->unp_addr = soun;
+ unp->unp_flags &= ~UNP_BINDING;
+ UNP_PCB_UNLOCK(unp);
+ UNP_LINK_WUNLOCK();
+#ifndef __rtems__
+ VOP_UNLOCK(vp, 0);
+ vn_finished_write(mp);
+ VFS_UNLOCK_GIANT(vfslocked);
+ free(buf, M_TEMP);
+#endif /* __rtems__ */
+ return (0);
+
+error:
+#ifndef __rtems__
+ VFS_UNLOCK_GIANT(vfslocked);
+#endif /* __rtems__ */
+ UNP_PCB_LOCK(unp);
+ unp->unp_flags &= ~UNP_BINDING;
+ UNP_PCB_UNLOCK(unp);
+#ifndef __rtems__
+ free(buf, M_TEMP);
+#endif /* __rtems__ */
+ return (error);
+}
+
+static int
+uipc_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
+{
+ int error;
+
+ KASSERT(td == curthread, ("uipc_connect: td != curthread"));
+ UNP_LINK_WLOCK();
+ error = unp_connect(so, nam, td);
+ UNP_LINK_WUNLOCK();
+ return (error);
+}
+
+static void
+uipc_close(struct socket *so)
+{
+ struct unpcb *unp, *unp2;
+
+ unp = sotounpcb(so);
+ KASSERT(unp != NULL, ("uipc_close: unp == NULL"));
+
+ UNP_LINK_WLOCK();
+ UNP_PCB_LOCK(unp);
+ unp2 = unp->unp_conn;
+ if (unp2 != NULL) {
+ UNP_PCB_LOCK(unp2);
+ unp_disconnect(unp, unp2);
+ UNP_PCB_UNLOCK(unp2);
+ }
+ UNP_PCB_UNLOCK(unp);
+ UNP_LINK_WUNLOCK();
+}
+
+static int
+uipc_connect2(struct socket *so1, struct socket *so2)
+{
+ struct unpcb *unp, *unp2;
+ int error;
+
+ UNP_LINK_WLOCK();
+ unp = so1->so_pcb;
+ KASSERT(unp != NULL, ("uipc_connect2: unp == NULL"));
+ UNP_PCB_LOCK(unp);
+ unp2 = so2->so_pcb;
+ KASSERT(unp2 != NULL, ("uipc_connect2: unp2 == NULL"));
+ UNP_PCB_LOCK(unp2);
+ error = unp_connect2(so1, so2, PRU_CONNECT2);
+ UNP_PCB_UNLOCK(unp2);
+ UNP_PCB_UNLOCK(unp);
+ UNP_LINK_WUNLOCK();
+ return (error);
+}
+
+static void
+uipc_detach(struct socket *so)
+{
+ struct unpcb *unp, *unp2;
+ struct sockaddr_un *saved_unp_addr;
+#ifndef __rtems__
+ struct vnode *vp;
+ int freeunp, local_unp_rights;
+#else /* __rtems__ */
+ struct IMFS_jnode_tt *vp;
+ int freeunp;
+#endif /* __rtems__ */
+
+ unp = sotounpcb(so);
+ KASSERT(unp != NULL, ("uipc_detach: unp == NULL"));
+
+ UNP_LINK_WLOCK();
+ UNP_LIST_LOCK();
+ UNP_PCB_LOCK(unp);
+ LIST_REMOVE(unp, unp_link);
+ unp->unp_gencnt = ++unp_gencnt;
+ --unp_count;
+ UNP_LIST_UNLOCK();
+
+ /*
+ * XXXRW: Should assert vp->v_socket == so.
+ */
+ if ((vp = unp->unp_vnode) != NULL) {
+#ifndef __rtems__
+ VOP_UNP_DETACH(vp);
+#else /* __rtems__ */
+ vp->control = &rtems_uipc_imfs_zombi_control;
+ vp->info.generic.context = NULL;
+#endif /* __rtems__ */
+ unp->unp_vnode = NULL;
+ }
+ unp2 = unp->unp_conn;
+ if (unp2 != NULL) {
+ UNP_PCB_LOCK(unp2);
+ unp_disconnect(unp, unp2);
+ UNP_PCB_UNLOCK(unp2);
+ }
+
+ /*
+ * We hold the linkage lock exclusively, so it's OK to acquire
+ * multiple pcb locks at a time.
+ */
+ while (!LIST_EMPTY(&unp->unp_refs)) {
+ struct unpcb *ref = LIST_FIRST(&unp->unp_refs);
+
+ UNP_PCB_LOCK(ref);
+ unp_drop(ref, ECONNRESET);
+ UNP_PCB_UNLOCK(ref);
+ }
+#ifndef __rtems__
+ local_unp_rights = unp_rights;
+#endif /* __rtems__ */
+ UNP_LINK_WUNLOCK();
+ unp->unp_socket->so_pcb = NULL;
+ saved_unp_addr = unp->unp_addr;
+ unp->unp_addr = NULL;
+ unp->unp_refcount--;
+ freeunp = (unp->unp_refcount == 0);
+ if (saved_unp_addr != NULL)
+ free(saved_unp_addr, M_SONAME);
+ if (freeunp) {
+ UNP_PCB_LOCK_DESTROY(unp);
+ uma_zfree(unp_zone, unp);
+ } else
+ UNP_PCB_UNLOCK(unp);
+#ifndef __rtems__
+ if (vp) {
+ int vfslocked;
+
+ vfslocked = VFS_LOCK_GIANT(vp->v_mount);
+ vrele(vp);
+ VFS_UNLOCK_GIANT(vfslocked);
+ }
+ if (local_unp_rights)
+ taskqueue_enqueue_timeout(taskqueue_thread, &unp_gc_task, -1);
+#endif /* __rtems__ */
+}
+
+static int
+uipc_disconnect(struct socket *so)
+{
+ struct unpcb *unp, *unp2;
+
+ unp = sotounpcb(so);
+ KASSERT(unp != NULL, ("uipc_disconnect: unp == NULL"));
+
+ UNP_LINK_WLOCK();
+ UNP_PCB_LOCK(unp);
+ unp2 = unp->unp_conn;
+ if (unp2 != NULL) {
+ UNP_PCB_LOCK(unp2);
+ unp_disconnect(unp, unp2);
+ UNP_PCB_UNLOCK(unp2);
+ }
+ UNP_PCB_UNLOCK(unp);
+ UNP_LINK_WUNLOCK();
+ return (0);
+}
+
+static int
+uipc_listen(struct socket *so, int backlog, struct thread *td)
+{
+ struct unpcb *unp;
+ int error;
+
+ unp = sotounpcb(so);
+ KASSERT(unp != NULL, ("uipc_listen: unp == NULL"));
+
+ UNP_PCB_LOCK(unp);
+ if (unp->unp_vnode == NULL) {
+ UNP_PCB_UNLOCK(unp);
+ return (EINVAL);
+ }
+
+ SOCK_LOCK(so);
+ error = solisten_proto_check(so);
+ if (error == 0) {
+ cru2x(td->td_ucred, &unp->unp_peercred);
+ unp->unp_flags |= UNP_HAVEPCCACHED;
+ solisten_proto(so, backlog);
+ }
+ SOCK_UNLOCK(so);
+ UNP_PCB_UNLOCK(unp);
+ return (error);
+}
+
+static int
+uipc_peeraddr(struct socket *so, struct sockaddr **nam)
+{
+ struct unpcb *unp, *unp2;
+ const struct sockaddr *sa;
+
+ unp = sotounpcb(so);
+ KASSERT(unp != NULL, ("uipc_peeraddr: unp == NULL"));
+
+ *nam = malloc(sizeof(struct sockaddr_un), M_SONAME, M_WAITOK);
+ UNP_LINK_RLOCK();
+ /*
+ * XXX: It seems that this test always fails even when connection is
+ * established. So, this else clause is added as workaround to
+ * return PF_LOCAL sockaddr.
+ */
+ unp2 = unp->unp_conn;
+ if (unp2 != NULL) {
+ UNP_PCB_LOCK(unp2);
+ if (unp2->unp_addr != NULL)
+ sa = (struct sockaddr *) unp2->unp_addr;
+ else
+ sa = &sun_noname;
+ bcopy(sa, *nam, sa->sa_len);
+ UNP_PCB_UNLOCK(unp2);
+ } else {
+ sa = &sun_noname;
+ bcopy(sa, *nam, sa->sa_len);
+ }
+ UNP_LINK_RUNLOCK();
+ return (0);
+}
+
+static int
+uipc_rcvd(struct socket *so, int flags)
+{
+ struct unpcb *unp, *unp2;
+ struct socket *so2;
+ u_int mbcnt, sbcc;
+ u_long newhiwat;
+
+ unp = sotounpcb(so);
+ KASSERT(unp != NULL, ("uipc_rcvd: unp == NULL"));
+
+ if (so->so_type != SOCK_STREAM && so->so_type != SOCK_SEQPACKET)
+ panic("uipc_rcvd socktype %d", so->so_type);
+
+ /*
+ * Adjust backpressure on sender and wakeup any waiting to write.
+ *
+ * The unp lock is acquired to maintain the validity of the unp_conn
+ * pointer; no lock on unp2 is required as unp2->unp_socket will be
+ * static as long as we don't permit unp2 to disconnect from unp,
+ * which is prevented by the lock on unp. We cache values from
+ * so_rcv to avoid holding the so_rcv lock over the entire
+ * transaction on the remote so_snd.
+ */
+ SOCKBUF_LOCK(&so->so_rcv);
+ mbcnt = so->so_rcv.sb_mbcnt;
+ sbcc = so->so_rcv.sb_cc;
+ SOCKBUF_UNLOCK(&so->so_rcv);
+ UNP_PCB_LOCK(unp);
+ unp2 = unp->unp_conn;
+ if (unp2 == NULL) {
+ UNP_PCB_UNLOCK(unp);
+ return (0);
+ }
+ so2 = unp2->unp_socket;
+ SOCKBUF_LOCK(&so2->so_snd);
+ so2->so_snd.sb_mbmax += unp->unp_mbcnt - mbcnt;
+ newhiwat = so2->so_snd.sb_hiwat + unp->unp_cc - sbcc;
+ (void)chgsbsize(so2->so_cred->cr_uidinfo, &so2->so_snd.sb_hiwat,
+ newhiwat, RLIM_INFINITY);
+ sowwakeup_locked(so2);
+ unp->unp_mbcnt = mbcnt;
+ unp->unp_cc = sbcc;
+ UNP_PCB_UNLOCK(unp);
+ return (0);
+}
+
+static int
+uipc_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
+ struct mbuf *control, struct thread *td)
+{
+ struct unpcb *unp, *unp2;
+ struct socket *so2;
+ u_int mbcnt_delta, sbcc;
+ u_int newhiwat;
+ int error = 0;
+
+ unp = sotounpcb(so);
+ KASSERT(unp != NULL, ("uipc_send: unp == NULL"));
+
+ if (flags & PRUS_OOB) {
+ error = EOPNOTSUPP;
+ goto release;
+ }
+#ifndef __rtems__
+ if (control != NULL && (error = unp_internalize(&control, td)))
+ goto release;
+#else /* __rtems__ */
+ if (control != NULL) {
+ error = ENOSYS;
+ goto release;
+ }
+#endif /* __rtems__ */
+ if ((nam != NULL) || (flags & PRUS_EOF))
+ UNP_LINK_WLOCK();
+ else
+ UNP_LINK_RLOCK();
+ switch (so->so_type) {
+ case SOCK_DGRAM:
+ {
+ const struct sockaddr *from;
+
+ unp2 = unp->unp_conn;
+ if (nam != NULL) {
+ UNP_LINK_WLOCK_ASSERT();
+ if (unp2 != NULL) {
+ error = EISCONN;
+ break;
+ }
+ error = unp_connect(so, nam, td);
+ if (error)
+ break;
+ unp2 = unp->unp_conn;
+ }
+
+ /*
+ * Because connect() and send() are non-atomic in a sendto()
+ * with a target address, it's possible that the socket will
+ * have disconnected before the send() can run. In that case
+ * return the slightly counter-intuitive but otherwise
+ * correct error that the socket is not connected.
+ */
+ if (unp2 == NULL) {
+ error = ENOTCONN;
+ break;
+ }
+ /* Lockless read. */
+ if (unp2->unp_flags & UNP_WANTCRED)
+#ifndef __rtems__
+ control = unp_addsockcred(td, control);
+#else /* __rtems__ */
+ control = NULL;
+#endif /* __rtems__ */
+ UNP_PCB_LOCK(unp);
+ if (unp->unp_addr != NULL)
+ from = (struct sockaddr *)unp->unp_addr;
+ else
+ from = &sun_noname;
+ so2 = unp2->unp_socket;
+ SOCKBUF_LOCK(&so2->so_rcv);
+ if (sbappendaddr_locked(&so2->so_rcv, from, m, control)) {
+ sorwakeup_locked(so2);
+ m = NULL;
+ control = NULL;
+ } else {
+ SOCKBUF_UNLOCK(&so2->so_rcv);
+ error = ENOBUFS;
+ }
+ if (nam != NULL) {
+ UNP_LINK_WLOCK_ASSERT();
+ UNP_PCB_LOCK(unp2);
+ unp_disconnect(unp, unp2);
+ UNP_PCB_UNLOCK(unp2);
+ }
+ UNP_PCB_UNLOCK(unp);
+ break;
+ }
+
+ case SOCK_SEQPACKET:
+ case SOCK_STREAM:
+ if ((so->so_state & SS_ISCONNECTED) == 0) {
+ if (nam != NULL) {
+ UNP_LINK_WLOCK_ASSERT();
+ error = unp_connect(so, nam, td);
+ if (error)
+ break; /* XXX */
+ } else {
+ error = ENOTCONN;
+ break;
+ }
+ }
+
+ /* Lockless read. */
+ if (so->so_snd.sb_state & SBS_CANTSENDMORE) {
+ error = EPIPE;
+ break;
+ }
+
+ /*
+ * Because connect() and send() are non-atomic in a sendto()
+ * with a target address, it's possible that the socket will
+ * have disconnected before the send() can run. In that case
+ * return the slightly counter-intuitive but otherwise
+ * correct error that the socket is not connected.
+ *
+ * Locking here must be done carefully: the linkage lock
+ * prevents interconnections between unpcbs from changing, so
+ * we can traverse from unp to unp2 without acquiring unp's
+ * lock. Socket buffer locks follow unpcb locks, so we can
+ * acquire both remote and lock socket buffer locks.
+ */
+ unp2 = unp->unp_conn;
+ if (unp2 == NULL) {
+ error = ENOTCONN;
+ break;
+ }
+ so2 = unp2->unp_socket;
+ UNP_PCB_LOCK(unp2);
+ SOCKBUF_LOCK(&so2->so_rcv);
+ if (unp2->unp_flags & UNP_WANTCRED) {
+#ifndef __rtems__
+ /*
+ * Credentials are passed only once on SOCK_STREAM.
+ */
+ unp2->unp_flags &= ~UNP_WANTCRED;
+ control = unp_addsockcred(td, control);
+#endif /* __rtems__ */
+ }
+ /*
+ * Send to paired receive port, and then reduce send buffer
+ * hiwater marks to maintain backpressure. Wake up readers.
+ */
+ switch (so->so_type) {
+ case SOCK_STREAM:
+ if (control != NULL) {
+ if (sbappendcontrol_locked(&so2->so_rcv, m,
+ control))
+ control = NULL;
+ } else
+ sbappend_locked(&so2->so_rcv, m);
+ break;
+
+ case SOCK_SEQPACKET: {
+ const struct sockaddr *from;
+
+ from = &sun_noname;
+ if (sbappendaddr_locked(&so2->so_rcv, from, m,
+ control))
+ control = NULL;
+ break;
+ }
+ }
+
+ /*
+ * XXXRW: While fine for SOCK_STREAM, this conflates maximum
+ * datagram size and back-pressure for SOCK_SEQPACKET, which
+ * can lead to undesired return of EMSGSIZE on send instead
+ * of more desirable blocking.
+ */
+ mbcnt_delta = so2->so_rcv.sb_mbcnt - unp2->unp_mbcnt;
+ unp2->unp_mbcnt = so2->so_rcv.sb_mbcnt;
+ sbcc = so2->so_rcv.sb_cc;
+ sorwakeup_locked(so2);
+
+ SOCKBUF_LOCK(&so->so_snd);
+ if ((int)so->so_snd.sb_hiwat >= (int)(sbcc - unp2->unp_cc))
+ newhiwat = so->so_snd.sb_hiwat - (sbcc - unp2->unp_cc);
+ else
+ newhiwat = 0;
+ (void)chgsbsize(so->so_cred->cr_uidinfo, &so->so_snd.sb_hiwat,
+ newhiwat, RLIM_INFINITY);
+ so->so_snd.sb_mbmax -= mbcnt_delta;
+ SOCKBUF_UNLOCK(&so->so_snd);
+ unp2->unp_cc = sbcc;
+ UNP_PCB_UNLOCK(unp2);
+ m = NULL;
+ break;
+
+ default:
+ panic("uipc_send unknown socktype");
+ }
+
+ /*
+ * PRUS_EOF is equivalent to pru_send followed by pru_shutdown.
+ */
+ if (flags & PRUS_EOF) {
+ UNP_PCB_LOCK(unp);
+ socantsendmore(so);
+ unp_shutdown(unp);
+ UNP_PCB_UNLOCK(unp);
+ }
+
+ if ((nam != NULL) || (flags & PRUS_EOF))
+ UNP_LINK_WUNLOCK();
+ else
+ UNP_LINK_RUNLOCK();
+
+ if (control != NULL && error != 0)
+#ifndef __rtems__
+ unp_dispose(control);
+#else /* __rtems__ */
+ BSD_ASSERT(0);
+#endif /* __rtems__ */
+
+release:
+ if (control != NULL)
+ m_freem(control);
+ if (m != NULL)
+ m_freem(m);
+ return (error);
+}
+
+static int
+uipc_sense(struct socket *so, struct stat *sb)
+{
+ struct unpcb *unp, *unp2;
+ struct socket *so2;
+
+ unp = sotounpcb(so);
+ KASSERT(unp != NULL, ("uipc_sense: unp == NULL"));
+
+ sb->st_blksize = so->so_snd.sb_hiwat;
+ UNP_LINK_RLOCK();
+ UNP_PCB_LOCK(unp);
+ unp2 = unp->unp_conn;
+ if ((so->so_type == SOCK_STREAM || so->so_type == SOCK_SEQPACKET) &&
+ unp2 != NULL) {
+ so2 = unp2->unp_socket;
+ sb->st_blksize += so2->so_rcv.sb_cc;
+ }
+ sb->st_dev = NODEV;
+ if (unp->unp_ino == 0)
+ unp->unp_ino = (++unp_ino == 0) ? ++unp_ino : unp_ino;
+ sb->st_ino = unp->unp_ino;
+ UNP_PCB_UNLOCK(unp);
+ UNP_LINK_RUNLOCK();
+ return (0);
+}
+
+static int
+uipc_shutdown(struct socket *so)
+{
+ struct unpcb *unp;
+
+ unp = sotounpcb(so);
+ KASSERT(unp != NULL, ("uipc_shutdown: unp == NULL"));
+
+ UNP_LINK_WLOCK();
+ UNP_PCB_LOCK(unp);
+ socantsendmore(so);
+ unp_shutdown(unp);
+ UNP_PCB_UNLOCK(unp);
+ UNP_LINK_WUNLOCK();
+ return (0);
+}
+
+static int
+uipc_sockaddr(struct socket *so, struct sockaddr **nam)
+{
+ struct unpcb *unp;
+ const struct sockaddr *sa;
+
+ unp = sotounpcb(so);
+ KASSERT(unp != NULL, ("uipc_sockaddr: unp == NULL"));
+
+ *nam = malloc(sizeof(struct sockaddr_un), M_SONAME, M_WAITOK);
+ UNP_PCB_LOCK(unp);
+ if (unp->unp_addr != NULL)
+ sa = (struct sockaddr *) unp->unp_addr;
+ else
+ sa = &sun_noname;
+ bcopy(sa, *nam, sa->sa_len);
+ UNP_PCB_UNLOCK(unp);
+ return (0);
+}
+
+static struct pr_usrreqs uipc_usrreqs_dgram = {
+ .pru_abort = uipc_abort,
+ .pru_accept = uipc_accept,
+ .pru_attach = uipc_attach,
+ .pru_bind = uipc_bind,
+ .pru_connect = uipc_connect,
+ .pru_connect2 = uipc_connect2,
+ .pru_detach = uipc_detach,
+ .pru_disconnect = uipc_disconnect,
+ .pru_listen = uipc_listen,
+ .pru_peeraddr = uipc_peeraddr,
+ .pru_rcvd = uipc_rcvd,
+ .pru_send = uipc_send,
+ .pru_sense = uipc_sense,
+ .pru_shutdown = uipc_shutdown,
+ .pru_sockaddr = uipc_sockaddr,
+ .pru_soreceive = soreceive_dgram,
+ .pru_close = uipc_close,
+};
+
+static struct pr_usrreqs uipc_usrreqs_seqpacket = {
+ .pru_abort = uipc_abort,
+ .pru_accept = uipc_accept,
+ .pru_attach = uipc_attach,
+ .pru_bind = uipc_bind,
+ .pru_connect = uipc_connect,
+ .pru_connect2 = uipc_connect2,
+ .pru_detach = uipc_detach,
+ .pru_disconnect = uipc_disconnect,
+ .pru_listen = uipc_listen,
+ .pru_peeraddr = uipc_peeraddr,
+ .pru_rcvd = uipc_rcvd,
+ .pru_send = uipc_send,
+ .pru_sense = uipc_sense,
+ .pru_shutdown = uipc_shutdown,
+ .pru_sockaddr = uipc_sockaddr,
+ .pru_soreceive = soreceive_generic, /* XXX: or...? */
+ .pru_close = uipc_close,
+};
+
+static struct pr_usrreqs uipc_usrreqs_stream = {
+ .pru_abort = uipc_abort,
+ .pru_accept = uipc_accept,
+ .pru_attach = uipc_attach,
+ .pru_bind = uipc_bind,
+ .pru_connect = uipc_connect,
+ .pru_connect2 = uipc_connect2,
+ .pru_detach = uipc_detach,
+ .pru_disconnect = uipc_disconnect,
+ .pru_listen = uipc_listen,
+ .pru_peeraddr = uipc_peeraddr,
+ .pru_rcvd = uipc_rcvd,
+ .pru_send = uipc_send,
+ .pru_sense = uipc_sense,
+ .pru_shutdown = uipc_shutdown,
+ .pru_sockaddr = uipc_sockaddr,
+ .pru_soreceive = soreceive_generic,
+ .pru_close = uipc_close,
+};
+
+static int
+uipc_ctloutput(struct socket *so, struct sockopt *sopt)
+{
+ struct unpcb *unp;
+ struct xucred xu;
+ int error, optval;
+
+ if (sopt->sopt_level != 0)
+ return (EINVAL);
+
+ unp = sotounpcb(so);
+ KASSERT(unp != NULL, ("uipc_ctloutput: unp == NULL"));
+ error = 0;
+ switch (sopt->sopt_dir) {
+ case SOPT_GET:
+ switch (sopt->sopt_name) {
+ case LOCAL_PEERCRED:
+ UNP_PCB_LOCK(unp);
+ if (unp->unp_flags & UNP_HAVEPC)
+ xu = unp->unp_peercred;
+ else {
+ if (so->so_type == SOCK_STREAM)
+ error = ENOTCONN;
+ else
+ error = EINVAL;
+ }
+ UNP_PCB_UNLOCK(unp);
+ if (error == 0)
+ error = sooptcopyout(sopt, &xu, sizeof(xu));
+ break;
+
+ case LOCAL_CREDS:
+ /* Unlocked read. */
+ optval = unp->unp_flags & UNP_WANTCRED ? 1 : 0;
+ error = sooptcopyout(sopt, &optval, sizeof(optval));
+ break;
+
+ case LOCAL_CONNWAIT:
+ /* Unlocked read. */
+ optval = unp->unp_flags & UNP_CONNWAIT ? 1 : 0;
+ error = sooptcopyout(sopt, &optval, sizeof(optval));
+ break;
+
+ default:
+ error = EOPNOTSUPP;
+ break;
+ }
+ break;
+
+ case SOPT_SET:
+ switch (sopt->sopt_name) {
+ case LOCAL_CREDS:
+ case LOCAL_CONNWAIT:
+ error = sooptcopyin(sopt, &optval, sizeof(optval),
+ sizeof(optval));
+ if (error)
+ break;
+
+#define OPTSET(bit) do { \
+ UNP_PCB_LOCK(unp); \
+ if (optval) \
+ unp->unp_flags |= bit; \
+ else \
+ unp->unp_flags &= ~bit; \
+ UNP_PCB_UNLOCK(unp); \
+} while (0)
+
+ switch (sopt->sopt_name) {
+ case LOCAL_CREDS:
+ OPTSET(UNP_WANTCRED);
+ break;
+
+ case LOCAL_CONNWAIT:
+ OPTSET(UNP_CONNWAIT);
+ break;
+
+ default:
+ break;
+ }
+ break;
+#undef OPTSET
+ default:
+ error = ENOPROTOOPT;
+ break;
+ }
+ break;
+
+ default:
+ error = EOPNOTSUPP;
+ break;
+ }
+ return (error);
+}
+
+static int
+unp_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
+{
+ struct sockaddr_un *soun = (struct sockaddr_un *)nam;
+#ifndef __rtems__
+ struct vnode *vp;
+#else /* __rtems__ */
+ struct IMFS_jnode_tt *vp;
+#endif /* __rtems__ */
+ struct socket *so2, *so3;
+ struct unpcb *unp, *unp2, *unp3;
+#ifndef __rtems__
+ int error, len, vfslocked;
+ struct nameidata nd;
+ char buf[SOCK_MAXADDRLEN];
+#else /* __rtems__ */
+ int error, len;
+ rtems_filesystem_eval_path_context_t ctx;
+ int eval_flags;
+ const rtems_filesystem_location_info_t *currentloc;
+#endif /* __rtems__ */
+ struct sockaddr *sa;
+
+ UNP_LINK_WLOCK_ASSERT();
+
+ unp = sotounpcb(so);
+ KASSERT(unp != NULL, ("unp_connect: unp == NULL"));
+
+ if (nam->sa_len > sizeof(struct sockaddr_un))
+ return (EINVAL);
+ len = nam->sa_len - offsetof(struct sockaddr_un, sun_path);
+ if (len <= 0)
+ return (EINVAL);
+#ifndef __rtems__
+ bcopy(soun->sun_path, buf, len);
+ buf[len] = 0;
+#endif /* __rtems__ */
+
+ UNP_PCB_LOCK(unp);
+ if (unp->unp_flags & UNP_CONNECTING) {
+ UNP_PCB_UNLOCK(unp);
+ return (EALREADY);
+ }
+ UNP_LINK_WUNLOCK();
+ unp->unp_flags |= UNP_CONNECTING;
+ UNP_PCB_UNLOCK(unp);
+
+ sa = malloc(sizeof(struct sockaddr_un), M_SONAME, M_WAITOK);
+#ifndef __rtems__
+ NDINIT(&nd, LOOKUP, MPSAFE | FOLLOW | LOCKSHARED | LOCKLEAF,
+ UIO_SYSSPACE, buf, td);
+ error = namei(&nd);
+ if (error)
+ vp = NULL;
+ else
+ vp = nd.ni_vp;
+ ASSERT_VOP_LOCKED(vp, "unp_connect");
+ vfslocked = NDHASGIANT(&nd);
+ NDFREE(&nd, NDF_ONLY_PNBUF);
+ if (error)
+ goto bad;
+
+ if (vp->v_type != VSOCK) {
+ error = ENOTSOCK;
+ goto bad;
+ }
+#ifdef MAC
+ error = mac_vnode_check_open(td->td_ucred, vp, VWRITE | VREAD);
+ if (error)
+ goto bad;
+#endif
+ error = VOP_ACCESS(vp, VWRITE, td->td_ucred, td);
+ if (error)
+ goto bad;
+ VFS_UNLOCK_GIANT(vfslocked);
+#else /* __rtems__ */
+ soun->sun_path[len] = '\0';
+ eval_flags = RTEMS_FS_FOLLOW_LINK;
+ currentloc = rtems_filesystem_eval_path_start(&ctx,
+ &soun->sun_path[0], eval_flags);
+
+ if (currentloc->handlers == &socketops) {
+ vp = currentloc->node_access;
+ } else {
+ vp = NULL;
+ }
+
+ rtems_filesystem_eval_path_cleanup(&ctx);
+
+ if (vp == NULL) {
+ error = ENOTSOCK;
+ goto bad;
+ }
+#endif /* __rtems__ */
+
+ unp = sotounpcb(so);
+ KASSERT(unp != NULL, ("unp_connect: unp == NULL"));
+
+ /*
+ * Lock linkage lock for two reasons: make sure v_socket is stable,
+ * and to protect simultaneous locking of multiple pcbs.
+ */
+ UNP_LINK_WLOCK();
+#ifndef __rtems__
+ VOP_UNP_CONNECT(vp, &so2);
+#else /* __rtems__ */
+ so2 = IMFS_generic_get_context_by_node(vp);
+#endif /* __rtems__ */
+ if (so2 == NULL) {
+ error = ECONNREFUSED;
+ goto bad2;
+ }
+ if (so->so_type != so2->so_type) {
+ error = EPROTOTYPE;
+ goto bad2;
+ }
+ if (so->so_proto->pr_flags & PR_CONNREQUIRED) {
+ if (so2->so_options & SO_ACCEPTCONN) {
+ CURVNET_SET(so2->so_vnet);
+ so3 = sonewconn(so2, 0);
+ CURVNET_RESTORE();
+ } else
+ so3 = NULL;
+ if (so3 == NULL) {
+ error = ECONNREFUSED;
+ goto bad2;
+ }
+ unp = sotounpcb(so);
+ unp2 = sotounpcb(so2);
+ unp3 = sotounpcb(so3);
+ UNP_PCB_LOCK(unp);
+ UNP_PCB_LOCK(unp2);
+ UNP_PCB_LOCK(unp3);
+ if (unp2->unp_addr != NULL) {
+ bcopy(unp2->unp_addr, sa, unp2->unp_addr->sun_len);
+ unp3->unp_addr = (struct sockaddr_un *) sa;
+ sa = NULL;
+ }
+
+ /*
+ * The connecter's (client's) credentials are copied from its
+ * process structure at the time of connect() (which is now).
+ */
+ cru2x(td->td_ucred, &unp3->unp_peercred);
+ unp3->unp_flags |= UNP_HAVEPC;
+
+ /*
+ * The receiver's (server's) credentials are copied from the
+ * unp_peercred member of socket on which the former called
+ * listen(); uipc_listen() cached that process's credentials
+ * at that time so we can use them now.
+ */
+ KASSERT(unp2->unp_flags & UNP_HAVEPCCACHED,
+ ("unp_connect: listener without cached peercred"));
+ memcpy(&unp->unp_peercred, &unp2->unp_peercred,
+ sizeof(unp->unp_peercred));
+ unp->unp_flags |= UNP_HAVEPC;
+ if (unp2->unp_flags & UNP_WANTCRED)
+ unp3->unp_flags |= UNP_WANTCRED;
+ UNP_PCB_UNLOCK(unp3);
+ UNP_PCB_UNLOCK(unp2);
+ UNP_PCB_UNLOCK(unp);
+#ifdef MAC
+ mac_socketpeer_set_from_socket(so, so3);
+ mac_socketpeer_set_from_socket(so3, so);
+#endif
+
+ so2 = so3;
+ }
+ unp = sotounpcb(so);
+ KASSERT(unp != NULL, ("unp_connect: unp == NULL"));
+ unp2 = sotounpcb(so2);
+ KASSERT(unp2 != NULL, ("unp_connect: unp2 == NULL"));
+ UNP_PCB_LOCK(unp);
+ UNP_PCB_LOCK(unp2);
+ error = unp_connect2(so, so2, PRU_CONNECT);
+ UNP_PCB_UNLOCK(unp2);
+ UNP_PCB_UNLOCK(unp);
+bad2:
+ UNP_LINK_WUNLOCK();
+#ifndef __rtems__
+ if (vfslocked)
+ /*
+ * Giant has been previously acquired. This means filesystem
+ * isn't MPSAFE. Do it once again.
+ */
+ mtx_lock(&Giant);
+#endif /* __rtems__ */
+bad:
+#ifndef __rtems__
+ if (vp != NULL)
+ vput(vp);
+ VFS_UNLOCK_GIANT(vfslocked);
+#endif /* __rtems__ */
+ free(sa, M_SONAME);
+ UNP_LINK_WLOCK();
+ UNP_PCB_LOCK(unp);
+ unp->unp_flags &= ~UNP_CONNECTING;
+ UNP_PCB_UNLOCK(unp);
+ return (error);
+}
+
+static int
+unp_connect2(struct socket *so, struct socket *so2, int req)
+{
+ struct unpcb *unp;
+ struct unpcb *unp2;
+
+ unp = sotounpcb(so);
+ KASSERT(unp != NULL, ("unp_connect2: unp == NULL"));
+ unp2 = sotounpcb(so2);
+ KASSERT(unp2 != NULL, ("unp_connect2: unp2 == NULL"));
+
+ UNP_LINK_WLOCK_ASSERT();
+ UNP_PCB_LOCK_ASSERT(unp);
+ UNP_PCB_LOCK_ASSERT(unp2);
+
+ if (so2->so_type != so->so_type)
+ return (EPROTOTYPE);
+ unp->unp_conn = unp2;
+
+ switch (so->so_type) {
+ case SOCK_DGRAM:
+ LIST_INSERT_HEAD(&unp2->unp_refs, unp, unp_reflink);
+ soisconnected(so);
+ break;
+
+ case SOCK_STREAM:
+ case SOCK_SEQPACKET:
+ unp2->unp_conn = unp;
+ if (req == PRU_CONNECT &&
+ ((unp->unp_flags | unp2->unp_flags) & UNP_CONNWAIT))
+ soisconnecting(so);
+ else
+ soisconnected(so);
+ soisconnected(so2);
+ break;
+
+ default:
+ panic("unp_connect2");
+ }
+ return (0);
+}
+
+static void
+unp_disconnect(struct unpcb *unp, struct unpcb *unp2)
+{
+ struct socket *so;
+
+ KASSERT(unp2 != NULL, ("unp_disconnect: unp2 == NULL"));
+
+ UNP_LINK_WLOCK_ASSERT();
+ UNP_PCB_LOCK_ASSERT(unp);
+ UNP_PCB_LOCK_ASSERT(unp2);
+
+ unp->unp_conn = NULL;
+ switch (unp->unp_socket->so_type) {
+ case SOCK_DGRAM:
+ LIST_REMOVE(unp, unp_reflink);
+ so = unp->unp_socket;
+ SOCK_LOCK(so);
+ so->so_state &= ~SS_ISCONNECTED;
+ SOCK_UNLOCK(so);
+ break;
+
+ case SOCK_STREAM:
+ case SOCK_SEQPACKET:
+ soisdisconnected(unp->unp_socket);
+ unp2->unp_conn = NULL;
+ soisdisconnected(unp2->unp_socket);
+ break;
+ }
+}
+
+/*
+ * unp_pcblist() walks the global list of struct unpcb's to generate a
+ * pointer list, bumping the refcount on each unpcb. It then copies them out
+ * sequentially, validating the generation number on each to see if it has
+ * been detached. All of this is necessary because copyout() may sleep on
+ * disk I/O.
+ */
+static int
+unp_pcblist(SYSCTL_HANDLER_ARGS)
+{
+ int error, i, n;
+ int freeunp;
+ struct unpcb *unp, **unp_list;
+ unp_gen_t gencnt;
+ struct xunpgen *xug;
+ struct unp_head *head;
+ struct xunpcb *xu;
+
+ switch ((intptr_t)arg1) {
+ case SOCK_STREAM:
+ head = &unp_shead;
+ break;
+
+ case SOCK_DGRAM:
+ head = &unp_dhead;
+ break;
+
+ case SOCK_SEQPACKET:
+ head = &unp_sphead;
+ break;
+
+ default:
+ panic("unp_pcblist: arg1 %d", (int)(intptr_t)arg1);
+ }
+
+ /*
+ * The process of preparing the PCB list is too time-consuming and
+ * resource-intensive to repeat twice on every request.
+ */
+ if (req->oldptr == NULL) {
+ n = unp_count;
+ req->oldidx = 2 * (sizeof *xug)
+ + (n + n/8) * sizeof(struct xunpcb);
+ return (0);
+ }
+
+ if (req->newptr != NULL)
+ return (EPERM);
+
+ /*
+ * OK, now we're committed to doing something.
+ */
+ xug = malloc(sizeof(*xug), M_TEMP, M_WAITOK);
+ UNP_LIST_LOCK();
+ gencnt = unp_gencnt;
+ n = unp_count;
+ UNP_LIST_UNLOCK();
+
+ xug->xug_len = sizeof *xug;
+ xug->xug_count = n;
+ xug->xug_gen = gencnt;
+ xug->xug_sogen = so_gencnt;
+ error = SYSCTL_OUT(req, xug, sizeof *xug);
+ if (error) {
+ free(xug, M_TEMP);
+ return (error);
+ }
+
+ unp_list = malloc(n * sizeof *unp_list, M_TEMP, M_WAITOK);
+
+ UNP_LIST_LOCK();
+ for (unp = LIST_FIRST(head), i = 0; unp && i < n;
+ unp = LIST_NEXT(unp, unp_link)) {
+ UNP_PCB_LOCK(unp);
+ if (unp->unp_gencnt <= gencnt) {
+ if (cr_cansee(req->td->td_ucred,
+ unp->unp_socket->so_cred)) {
+ UNP_PCB_UNLOCK(unp);
+ continue;
+ }
+ unp_list[i++] = unp;
+ unp->unp_refcount++;
+ }
+ UNP_PCB_UNLOCK(unp);
+ }
+ UNP_LIST_UNLOCK();
+ n = i; /* In case we lost some during malloc. */
+
+ error = 0;
+ xu = malloc(sizeof(*xu), M_TEMP, M_WAITOK | M_ZERO);
+ for (i = 0; i < n; i++) {
+ unp = unp_list[i];
+ UNP_PCB_LOCK(unp);
+ unp->unp_refcount--;
+ if (unp->unp_refcount != 0 && unp->unp_gencnt <= gencnt) {
+ xu->xu_len = sizeof *xu;
+ xu->xu_unpp = unp;
+ /*
+ * XXX - need more locking here to protect against
+ * connect/disconnect races for SMP.
+ */
+ if (unp->unp_addr != NULL)
+ bcopy(unp->unp_addr, &xu->xu_addr,
+ unp->unp_addr->sun_len);
+ if (unp->unp_conn != NULL &&
+ unp->unp_conn->unp_addr != NULL)
+ bcopy(unp->unp_conn->unp_addr,
+ &xu->xu_caddr,
+ unp->unp_conn->unp_addr->sun_len);
+ bcopy(unp, &xu->xu_unp, sizeof *unp);
+ sotoxsocket(unp->unp_socket, &xu->xu_socket);
+ UNP_PCB_UNLOCK(unp);
+ error = SYSCTL_OUT(req, xu, sizeof *xu);
+ } else {
+ freeunp = (unp->unp_refcount == 0);
+ UNP_PCB_UNLOCK(unp);
+ if (freeunp) {
+ UNP_PCB_LOCK_DESTROY(unp);
+ uma_zfree(unp_zone, unp);
+ }
+ }
+ }
+ free(xu, M_TEMP);
+ if (!error) {
+ /*
+ * Give the user an updated idea of our state. If the
+ * generation differs from what we told her before, she knows
+ * that something happened while we were processing this
+ * request, and it might be necessary to retry.
+ */
+ xug->xug_gen = unp_gencnt;
+ xug->xug_sogen = so_gencnt;
+ xug->xug_count = unp_count;
+ error = SYSCTL_OUT(req, xug, sizeof *xug);
+ }
+ free(unp_list, M_TEMP);
+ free(xug, M_TEMP);
+ return (error);
+}
+
+SYSCTL_PROC(_net_local_dgram, OID_AUTO, pcblist, CTLTYPE_OPAQUE | CTLFLAG_RD,
+ (void *)(intptr_t)SOCK_DGRAM, 0, unp_pcblist, "S,xunpcb",
+ "List of active local datagram sockets");
+SYSCTL_PROC(_net_local_stream, OID_AUTO, pcblist, CTLTYPE_OPAQUE | CTLFLAG_RD,
+ (void *)(intptr_t)SOCK_STREAM, 0, unp_pcblist, "S,xunpcb",
+ "List of active local stream sockets");
+SYSCTL_PROC(_net_local_seqpacket, OID_AUTO, pcblist,
+ CTLTYPE_OPAQUE | CTLFLAG_RD,
+ (void *)(intptr_t)SOCK_SEQPACKET, 0, unp_pcblist, "S,xunpcb",
+ "List of active local seqpacket sockets");
+
+static void
+unp_shutdown(struct unpcb *unp)
+{
+ struct unpcb *unp2;
+ struct socket *so;
+
+ UNP_LINK_WLOCK_ASSERT();
+ UNP_PCB_LOCK_ASSERT(unp);
+
+ unp2 = unp->unp_conn;
+ if ((unp->unp_socket->so_type == SOCK_STREAM ||
+ (unp->unp_socket->so_type == SOCK_SEQPACKET)) && unp2 != NULL) {
+ so = unp2->unp_socket;
+ if (so != NULL)
+ socantrcvmore(so);
+ }
+}
+
+static void
+#ifndef __rtems__
+unp_drop(struct unpcb *unp, int errno)
+#else /* __rtems__ */
+unp_drop(struct unpcb *unp, int error)
+#endif /* __rtems__ */
+{
+ struct socket *so = unp->unp_socket;
+ struct unpcb *unp2;
+
+ UNP_LINK_WLOCK_ASSERT();
+ UNP_PCB_LOCK_ASSERT(unp);
+
+#ifndef __rtems__
+ so->so_error = errno;
+#else /* __rtems__ */
+ so->so_error = error;
+#endif /* __rtems__ */
+ unp2 = unp->unp_conn;
+ if (unp2 == NULL)
+ return;
+ UNP_PCB_LOCK(unp2);
+ unp_disconnect(unp, unp2);
+ UNP_PCB_UNLOCK(unp2);
+}
+
+#ifndef __rtems__
+static void
+unp_freerights(struct file **rp, int fdcount)
+{
+ int i;
+ struct file *fp;
+
+ for (i = 0; i < fdcount; i++) {
+ fp = *rp;
+ *rp++ = NULL;
+ unp_discard(fp);
+ }
+}
+
+static int
+unp_externalize(struct mbuf *control, struct mbuf **controlp)
+{
+ struct thread *td = curthread; /* XXX */
+ struct cmsghdr *cm = mtod(control, struct cmsghdr *);
+ int i;
+ int *fdp;
+ struct file **rp;
+ struct file *fp;
+ void *data;
+ socklen_t clen = control->m_len, datalen;
+ int error, newfds;
+ u_int newlen;
+
+ UNP_LINK_UNLOCK_ASSERT();
+
+ error = 0;
+ if (controlp != NULL) /* controlp == NULL => free control messages */
+ *controlp = NULL;
+ while (cm != NULL) {
+ if (sizeof(*cm) > clen || cm->cmsg_len > clen) {
+ error = EINVAL;
+ break;
+ }
+ data = CMSG_DATA(cm);
+ datalen = (caddr_t)cm + cm->cmsg_len - (caddr_t)data;
+ if (cm->cmsg_level == SOL_SOCKET
+ && cm->cmsg_type == SCM_RIGHTS) {
+ newfds = datalen / sizeof(struct file *);
+ rp = data;
+
+ /* If we're not outputting the descriptors free them. */
+ if (error || controlp == NULL) {
+ unp_freerights(rp, newfds);
+ goto next;
+ }
+ FILEDESC_XLOCK(td->td_proc->p_fd);
+ /*
+ * Now change each pointer to an fd in the global
+ * table to an integer that is the index to the local
+ * fd table entry that we set up to point to the
+ * global one we are transferring.
+ */
+ newlen = newfds * sizeof(int);
+ *controlp = sbcreatecontrol(NULL, newlen,
+ SCM_RIGHTS, SOL_SOCKET);
+ if (*controlp == NULL) {
+ FILEDESC_XUNLOCK(td->td_proc->p_fd);
+ error = E2BIG;
+ unp_freerights(rp, newfds);
+ goto next;
+ }
+
+ fdp = (int *)
+ CMSG_DATA(mtod(*controlp, struct cmsghdr *));
+ if (fdallocn(td, 0, fdp, newfds) != 0) {
+ FILEDESC_XUNLOCK(td->td_proc->p_fd);
+ error = EMSGSIZE;
+ unp_freerights(rp, newfds);
+ m_freem(*controlp);
+ *controlp = NULL;
+ goto next;
+ }
+ for (i = 0; i < newfds; i++) {
+ fp = *rp++;
+ td->td_proc->p_fd->fd_ofiles[fdp[i]] = fp;
+ unp_externalize_fp(fp);
+ }
+ FILEDESC_XUNLOCK(td->td_proc->p_fd);
+ } else {
+ /* We can just copy anything else across. */
+ if (error || controlp == NULL)
+ goto next;
+ *controlp = sbcreatecontrol(NULL, datalen,
+ cm->cmsg_type, cm->cmsg_level);
+ if (*controlp == NULL) {
+ error = ENOBUFS;
+ goto next;
+ }
+ bcopy(data,
+ CMSG_DATA(mtod(*controlp, struct cmsghdr *)),
+ datalen);
+ }
+ controlp = &(*controlp)->m_next;
+
+next:
+ if (CMSG_SPACE(datalen) < clen) {
+ clen -= CMSG_SPACE(datalen);
+ cm = (struct cmsghdr *)
+ ((caddr_t)cm + CMSG_SPACE(datalen));
+ } else {
+ clen = 0;
+ cm = NULL;
+ }
+ }
+
+ m_freem(control);
+ return (error);
+}
+#endif /* __rtems__ */
+
+static void
+unp_zone_change(void *tag)
+{
+
+ uma_zone_set_max(unp_zone, maxsockets);
+}
+
+static void
+unp_init(void)
+{
+
+#ifdef VIMAGE
+ if (!IS_DEFAULT_VNET(curvnet))
+ return;
+#endif
+ unp_zone = uma_zcreate("unpcb", sizeof(struct unpcb), NULL, NULL,
+ NULL, NULL, UMA_ALIGN_PTR, 0);
+ if (unp_zone == NULL)
+ panic("unp_init");
+ uma_zone_set_max(unp_zone, maxsockets);
+ EVENTHANDLER_REGISTER(maxsockets_change, unp_zone_change,
+ NULL, EVENTHANDLER_PRI_ANY);
+ LIST_INIT(&unp_dhead);
+ LIST_INIT(&unp_shead);
+ LIST_INIT(&unp_sphead);
+#ifndef __rtems__
+ SLIST_INIT(&unp_defers);
+ TIMEOUT_TASK_INIT(taskqueue_thread, &unp_gc_task, 0, unp_gc, NULL);
+ TASK_INIT(&unp_defer_task, 0, unp_process_defers, NULL);
+#endif /* __rtems__ */
+ UNP_LINK_LOCK_INIT();
+ UNP_LIST_LOCK_INIT();
+ UNP_DEFERRED_LOCK_INIT();
+}
+
+#ifndef __rtems__
+static int
+unp_internalize(struct mbuf **controlp, struct thread *td)
+{
+ struct mbuf *control = *controlp;
+ struct proc *p = td->td_proc;
+ struct filedesc *fdescp = p->p_fd;
+ struct bintime *bt;
+ struct cmsghdr *cm = mtod(control, struct cmsghdr *);
+ struct cmsgcred *cmcred;
+ struct file **rp;
+ struct file *fp;
+ struct timeval *tv;
+ int i, fd, *fdp;
+ void *data;
+ socklen_t clen = control->m_len, datalen;
+ int error, oldfds;
+ u_int newlen;
+
+ UNP_LINK_UNLOCK_ASSERT();
+
+ error = 0;
+ *controlp = NULL;
+ while (cm != NULL) {
+ if (sizeof(*cm) > clen || cm->cmsg_level != SOL_SOCKET
+ || cm->cmsg_len > clen) {
+ error = EINVAL;
+ goto out;
+ }
+ data = CMSG_DATA(cm);
+ datalen = (caddr_t)cm + cm->cmsg_len - (caddr_t)data;
+
+ switch (cm->cmsg_type) {
+ /*
+ * Fill in credential information.
+ */
+ case SCM_CREDS:
+ *controlp = sbcreatecontrol(NULL, sizeof(*cmcred),
+ SCM_CREDS, SOL_SOCKET);
+ if (*controlp == NULL) {
+ error = ENOBUFS;
+ goto out;
+ }
+ cmcred = (struct cmsgcred *)
+ CMSG_DATA(mtod(*controlp, struct cmsghdr *));
+ cmcred->cmcred_pid = p->p_pid;
+ cmcred->cmcred_uid = td->td_ucred->cr_ruid;
+ cmcred->cmcred_gid = td->td_ucred->cr_rgid;
+ cmcred->cmcred_euid = td->td_ucred->cr_uid;
+ cmcred->cmcred_ngroups = MIN(td->td_ucred->cr_ngroups,
+ CMGROUP_MAX);
+ for (i = 0; i < cmcred->cmcred_ngroups; i++)
+ cmcred->cmcred_groups[i] =
+ td->td_ucred->cr_groups[i];
+ break;
+
+ case SCM_RIGHTS:
+ oldfds = datalen / sizeof (int);
+ /*
+ * Check that all the FDs passed in refer to legal
+ * files. If not, reject the entire operation.
+ */
+ fdp = data;
+ FILEDESC_SLOCK(fdescp);
+ for (i = 0; i < oldfds; i++) {
+ fd = *fdp++;
+ if ((unsigned)fd >= fdescp->fd_nfiles ||
+ fdescp->fd_ofiles[fd] == NULL) {
+ FILEDESC_SUNLOCK(fdescp);
+ error = EBADF;
+ goto out;
+ }
+ fp = fdescp->fd_ofiles[fd];
+ if (!(fp->f_ops->fo_flags & DFLAG_PASSABLE)) {
+ FILEDESC_SUNLOCK(fdescp);
+ error = EOPNOTSUPP;
+ goto out;
+ }
+
+ }
+
+ /*
+ * Now replace the integer FDs with pointers to the
+ * associated global file table entry..
+ */
+ newlen = oldfds * sizeof(struct file *);
+ *controlp = sbcreatecontrol(NULL, newlen,
+ SCM_RIGHTS, SOL_SOCKET);
+ if (*controlp == NULL) {
+ FILEDESC_SUNLOCK(fdescp);
+ error = E2BIG;
+ goto out;
+ }
+ fdp = data;
+ rp = (struct file **)
+ CMSG_DATA(mtod(*controlp, struct cmsghdr *));
+ for (i = 0; i < oldfds; i++) {
+ fp = fdescp->fd_ofiles[*fdp++];
+ *rp++ = fp;
+ unp_internalize_fp(fp);
+ }
+ FILEDESC_SUNLOCK(fdescp);
+ break;
+
+ case SCM_TIMESTAMP:
+ *controlp = sbcreatecontrol(NULL, sizeof(*tv),
+ SCM_TIMESTAMP, SOL_SOCKET);
+ if (*controlp == NULL) {
+ error = ENOBUFS;
+ goto out;
+ }
+ tv = (struct timeval *)
+ CMSG_DATA(mtod(*controlp, struct cmsghdr *));
+ microtime(tv);
+ break;
+
+ case SCM_BINTIME:
+ *controlp = sbcreatecontrol(NULL, sizeof(*bt),
+ SCM_BINTIME, SOL_SOCKET);
+ if (*controlp == NULL) {
+ error = ENOBUFS;
+ goto out;
+ }
+ bt = (struct bintime *)
+ CMSG_DATA(mtod(*controlp, struct cmsghdr *));
+ bintime(bt);
+ break;
+
+ default:
+ error = EINVAL;
+ goto out;
+ }
+
+ controlp = &(*controlp)->m_next;
+ if (CMSG_SPACE(datalen) < clen) {
+ clen -= CMSG_SPACE(datalen);
+ cm = (struct cmsghdr *)
+ ((caddr_t)cm + CMSG_SPACE(datalen));
+ } else {
+ clen = 0;
+ cm = NULL;
+ }
+ }
+
+out:
+ m_freem(control);
+ return (error);
+}
+
+static struct mbuf *
+unp_addsockcred(struct thread *td, struct mbuf *control)
+{
+ struct mbuf *m, *n, *n_prev;
+ struct sockcred *sc;
+ const struct cmsghdr *cm;
+ int ngroups;
+ int i;
+
+ ngroups = MIN(td->td_ucred->cr_ngroups, CMGROUP_MAX);
+ m = sbcreatecontrol(NULL, SOCKCREDSIZE(ngroups), SCM_CREDS, SOL_SOCKET);
+ if (m == NULL)
+ return (control);
+
+ sc = (struct sockcred *) CMSG_DATA(mtod(m, struct cmsghdr *));
+ sc->sc_uid = td->td_ucred->cr_ruid;
+ sc->sc_euid = td->td_ucred->cr_uid;
+ sc->sc_gid = td->td_ucred->cr_rgid;
+ sc->sc_egid = td->td_ucred->cr_gid;
+ sc->sc_ngroups = ngroups;
+ for (i = 0; i < sc->sc_ngroups; i++)
+ sc->sc_groups[i] = td->td_ucred->cr_groups[i];
+
+ /*
+ * Unlink SCM_CREDS control messages (struct cmsgcred), since just
+ * created SCM_CREDS control message (struct sockcred) has another
+ * format.
+ */
+ if (control != NULL)
+ for (n = control, n_prev = NULL; n != NULL;) {
+ cm = mtod(n, struct cmsghdr *);
+ if (cm->cmsg_level == SOL_SOCKET &&
+ cm->cmsg_type == SCM_CREDS) {
+ if (n_prev == NULL)
+ control = n->m_next;
+ else
+ n_prev->m_next = n->m_next;
+ n = m_free(n);
+ } else {
+ n_prev = n;
+ n = n->m_next;
+ }
+ }
+
+ /* Prepend it to the head. */
+ m->m_next = control;
+ return (m);
+}
+
+static struct unpcb *
+fptounp(struct file *fp)
+{
+ struct socket *so;
+
+ if (fp->f_type != DTYPE_SOCKET)
+ return (NULL);
+ if ((so = fp->f_data) == NULL)
+ return (NULL);
+ if (so->so_proto->pr_domain != &localdomain)
+ return (NULL);
+ return sotounpcb(so);
+}
+
+static void
+unp_discard(struct file *fp)
+{
+ struct unp_defer *dr;
+
+ if (unp_externalize_fp(fp)) {
+ dr = malloc(sizeof(*dr), M_TEMP, M_WAITOK);
+ dr->ud_fp = fp;
+ UNP_DEFERRED_LOCK();
+ SLIST_INSERT_HEAD(&unp_defers, dr, ud_link);
+ UNP_DEFERRED_UNLOCK();
+ atomic_add_int(&unp_defers_count, 1);
+ taskqueue_enqueue(taskqueue_thread, &unp_defer_task);
+ } else
+ (void) closef(fp, (struct thread *)NULL);
+}
+
+static void
+unp_process_defers(void *arg __unused, int pending)
+{
+ struct unp_defer *dr;
+ SLIST_HEAD(, unp_defer) drl;
+ int count;
+
+ SLIST_INIT(&drl);
+ for (;;) {
+ UNP_DEFERRED_LOCK();
+ if (SLIST_FIRST(&unp_defers) == NULL) {
+ UNP_DEFERRED_UNLOCK();
+ break;
+ }
+ SLIST_SWAP(&unp_defers, &drl, unp_defer);
+ UNP_DEFERRED_UNLOCK();
+ count = 0;
+ while ((dr = SLIST_FIRST(&drl)) != NULL) {
+ SLIST_REMOVE_HEAD(&drl, ud_link);
+ closef(dr->ud_fp, NULL);
+ free(dr, M_TEMP);
+ count++;
+ }
+ atomic_add_int(&unp_defers_count, -count);
+ }
+}
+
+static void
+unp_internalize_fp(struct file *fp)
+{
+ struct unpcb *unp;
+
+ UNP_LINK_WLOCK();
+ if ((unp = fptounp(fp)) != NULL) {
+ unp->unp_file = fp;
+ unp->unp_msgcount++;
+ }
+ fhold(fp);
+ unp_rights++;
+ UNP_LINK_WUNLOCK();
+}
+
+static int
+unp_externalize_fp(struct file *fp)
+{
+ struct unpcb *unp;
+ int ret;
+
+ UNP_LINK_WLOCK();
+ if ((unp = fptounp(fp)) != NULL) {
+ unp->unp_msgcount--;
+ ret = 1;
+ } else
+ ret = 0;
+ unp_rights--;
+ UNP_LINK_WUNLOCK();
+ return (ret);
+}
+
+/*
+ * unp_defer indicates whether additional work has been defered for a future
+ * pass through unp_gc(). It is thread local and does not require explicit
+ * synchronization.
+ */
+static int unp_marked;
+static int unp_unreachable;
+
+static void
+unp_accessable(struct file *fp)
+{
+ struct unpcb *unp;
+
+ if ((unp = fptounp(fp)) == NULL)
+ return;
+ if (unp->unp_gcflag & UNPGC_REF)
+ return;
+ unp->unp_gcflag &= ~UNPGC_DEAD;
+ unp->unp_gcflag |= UNPGC_REF;
+ unp_marked++;
+}
+
+static void
+unp_gc_process(struct unpcb *unp)
+{
+ struct socket *soa;
+ struct socket *so;
+ struct file *fp;
+
+ /* Already processed. */
+ if (unp->unp_gcflag & UNPGC_SCANNED)
+ return;
+ fp = unp->unp_file;
+
+ /*
+ * Check for a socket potentially in a cycle. It must be in a
+ * queue as indicated by msgcount, and this must equal the file
+ * reference count. Note that when msgcount is 0 the file is NULL.
+ */
+ if ((unp->unp_gcflag & UNPGC_REF) == 0 && fp &&
+ unp->unp_msgcount != 0 && fp->f_count == unp->unp_msgcount) {
+ unp->unp_gcflag |= UNPGC_DEAD;
+ unp_unreachable++;
+ return;
+ }
+
+ /*
+ * Mark all sockets we reference with RIGHTS.
+ */
+ so = unp->unp_socket;
+ SOCKBUF_LOCK(&so->so_rcv);
+ unp_scan(so->so_rcv.sb_mb, unp_accessable);
+ SOCKBUF_UNLOCK(&so->so_rcv);
+
+ /*
+ * Mark all sockets in our accept queue.
+ */
+ ACCEPT_LOCK();
+ TAILQ_FOREACH(soa, &so->so_comp, so_list) {
+ SOCKBUF_LOCK(&soa->so_rcv);
+ unp_scan(soa->so_rcv.sb_mb, unp_accessable);
+ SOCKBUF_UNLOCK(&soa->so_rcv);
+ }
+ ACCEPT_UNLOCK();
+ unp->unp_gcflag |= UNPGC_SCANNED;
+}
+
+static int unp_recycled;
+SYSCTL_INT(_net_local, OID_AUTO, recycled, CTLFLAG_RD, &unp_recycled, 0,
+ "Number of unreachable sockets claimed by the garbage collector.");
+
+static int unp_taskcount;
+SYSCTL_INT(_net_local, OID_AUTO, taskcount, CTLFLAG_RD, &unp_taskcount, 0,
+ "Number of times the garbage collector has run.");
+
+static void
+unp_gc(__unused void *arg, int pending)
+{
+ struct unp_head *heads[] = { &unp_dhead, &unp_shead, &unp_sphead,
+ NULL };
+ struct unp_head **head;
+ struct file *f, **unref;
+ struct unpcb *unp;
+ int i, total;
+
+ unp_taskcount++;
+ UNP_LIST_LOCK();
+ /*
+ * First clear all gc flags from previous runs.
+ */
+ for (head = heads; *head != NULL; head++)
+ LIST_FOREACH(unp, *head, unp_link)
+ unp->unp_gcflag = 0;
+
+ /*
+ * Scan marking all reachable sockets with UNPGC_REF. Once a socket
+ * is reachable all of the sockets it references are reachable.
+ * Stop the scan once we do a complete loop without discovering
+ * a new reachable socket.
+ */
+ do {
+ unp_unreachable = 0;
+ unp_marked = 0;
+ for (head = heads; *head != NULL; head++)
+ LIST_FOREACH(unp, *head, unp_link)
+ unp_gc_process(unp);
+ } while (unp_marked);
+ UNP_LIST_UNLOCK();
+ if (unp_unreachable == 0)
+ return;
+
+ /*
+ * Allocate space for a local list of dead unpcbs.
+ */
+ unref = malloc(unp_unreachable * sizeof(struct file *),
+ M_TEMP, M_WAITOK);
+
+ /*
+ * Iterate looking for sockets which have been specifically marked
+ * as as unreachable and store them locally.
+ */
+ UNP_LINK_RLOCK();
+ UNP_LIST_LOCK();
+ for (total = 0, head = heads; *head != NULL; head++)
+ LIST_FOREACH(unp, *head, unp_link)
+ if ((unp->unp_gcflag & UNPGC_DEAD) != 0) {
+ f = unp->unp_file;
+ if (unp->unp_msgcount == 0 || f == NULL ||
+ f->f_count != unp->unp_msgcount)
+ continue;
+ unref[total++] = f;
+ fhold(f);
+ KASSERT(total <= unp_unreachable,
+ ("unp_gc: incorrect unreachable count."));
+ }
+ UNP_LIST_UNLOCK();
+ UNP_LINK_RUNLOCK();
+
+ /*
+ * Now flush all sockets, free'ing rights. This will free the
+ * struct files associated with these sockets but leave each socket
+ * with one remaining ref.
+ */
+ for (i = 0; i < total; i++) {
+ struct socket *so;
+
+ so = unref[i]->f_data;
+ CURVNET_SET(so->so_vnet);
+ sorflush(so);
+ CURVNET_RESTORE();
+ }
+
+ /*
+ * And finally release the sockets so they can be reclaimed.
+ */
+ for (i = 0; i < total; i++)
+ fdrop(unref[i], NULL);
+ unp_recycled += total;
+ free(unref, M_TEMP);
+}
+
+static void
+unp_dispose(struct mbuf *m)
+{
+
+ if (m)
+ unp_scan(m, unp_discard);
+}
+
+static void
+unp_scan(struct mbuf *m0, void (*op)(struct file *))
+{
+ struct mbuf *m;
+ struct file **rp;
+ struct cmsghdr *cm;
+ void *data;
+ int i;
+ socklen_t clen, datalen;
+ int qfds;
+
+ while (m0 != NULL) {
+ for (m = m0; m; m = m->m_next) {
+ if (m->m_type != MT_CONTROL)
+ continue;
+
+ cm = mtod(m, struct cmsghdr *);
+ clen = m->m_len;
+
+ while (cm != NULL) {
+ if (sizeof(*cm) > clen || cm->cmsg_len > clen)
+ break;
+
+ data = CMSG_DATA(cm);
+ datalen = (caddr_t)cm + cm->cmsg_len
+ - (caddr_t)data;
+
+ if (cm->cmsg_level == SOL_SOCKET &&
+ cm->cmsg_type == SCM_RIGHTS) {
+ qfds = datalen / sizeof (struct file *);
+ rp = data;
+ for (i = 0; i < qfds; i++)
+ (*op)(*rp++);
+ }
+
+ if (CMSG_SPACE(datalen) < clen) {
+ clen -= CMSG_SPACE(datalen);
+ cm = (struct cmsghdr *)
+ ((caddr_t)cm + CMSG_SPACE(datalen));
+ } else {
+ clen = 0;
+ cm = NULL;
+ }
+ }
+ }
+ m0 = m0->m_act;
+ }
+}
+
+/*
+ * A helper function called by VFS before socket-type vnode reclamation.
+ * For an active vnode it clears unp_vnode pointer and decrements unp_vnode
+ * use count.
+ */
+void
+vfs_unp_reclaim(struct vnode *vp)
+{
+ struct socket *so;
+ struct unpcb *unp;
+ int active;
+
+ ASSERT_VOP_ELOCKED(vp, "vfs_unp_reclaim");
+ KASSERT(vp->v_type == VSOCK,
+ ("vfs_unp_reclaim: vp->v_type != VSOCK"));
+
+ active = 0;
+ UNP_LINK_WLOCK();
+ VOP_UNP_CONNECT(vp, &so);
+ if (so == NULL)
+ goto done;
+ unp = sotounpcb(so);
+ if (unp == NULL)
+ goto done;
+ UNP_PCB_LOCK(unp);
+ if (unp->unp_vnode == vp) {
+ VOP_UNP_DETACH(vp);
+ unp->unp_vnode = NULL;
+ active = 1;
+ }
+ UNP_PCB_UNLOCK(unp);
+done:
+ UNP_LINK_WUNLOCK();
+ if (active)
+ vunref(vp);
+}
+#endif /* __rtems__ */
+
+#ifdef DDB
+static void
+db_print_indent(int indent)
+{
+ int i;
+
+ for (i = 0; i < indent; i++)
+ db_printf(" ");
+}
+
+static void
+db_print_unpflags(int unp_flags)
+{
+ int comma;
+
+ comma = 0;
+ if (unp_flags & UNP_HAVEPC) {
+ db_printf("%sUNP_HAVEPC", comma ? ", " : "");
+ comma = 1;
+ }
+ if (unp_flags & UNP_HAVEPCCACHED) {
+ db_printf("%sUNP_HAVEPCCACHED", comma ? ", " : "");
+ comma = 1;
+ }
+ if (unp_flags & UNP_WANTCRED) {
+ db_printf("%sUNP_WANTCRED", comma ? ", " : "");
+ comma = 1;
+ }
+ if (unp_flags & UNP_CONNWAIT) {
+ db_printf("%sUNP_CONNWAIT", comma ? ", " : "");
+ comma = 1;
+ }
+ if (unp_flags & UNP_CONNECTING) {
+ db_printf("%sUNP_CONNECTING", comma ? ", " : "");
+ comma = 1;
+ }
+ if (unp_flags & UNP_BINDING) {
+ db_printf("%sUNP_BINDING", comma ? ", " : "");
+ comma = 1;
+ }
+}
+
+static void
+db_print_xucred(int indent, struct xucred *xu)
+{
+ int comma, i;
+
+ db_print_indent(indent);
+ db_printf("cr_version: %u cr_uid: %u cr_ngroups: %d\n",
+ xu->cr_version, xu->cr_uid, xu->cr_ngroups);
+ db_print_indent(indent);
+ db_printf("cr_groups: ");
+ comma = 0;
+ for (i = 0; i < xu->cr_ngroups; i++) {
+ db_printf("%s%u", comma ? ", " : "", xu->cr_groups[i]);
+ comma = 1;
+ }
+ db_printf("\n");
+}
+
+static void
+db_print_unprefs(int indent, struct unp_head *uh)
+{
+ struct unpcb *unp;
+ int counter;
+
+ counter = 0;
+ LIST_FOREACH(unp, uh, unp_reflink) {
+ if (counter % 4 == 0)
+ db_print_indent(indent);
+ db_printf("%p ", unp);
+ if (counter % 4 == 3)
+ db_printf("\n");
+ counter++;
+ }
+ if (counter != 0 && counter % 4 != 0)
+ db_printf("\n");
+}
+
+DB_SHOW_COMMAND(unpcb, db_show_unpcb)
+{
+ struct unpcb *unp;
+
+ if (!have_addr) {
+ db_printf("usage: show unpcb <addr>\n");
+ return;
+ }
+ unp = (struct unpcb *)addr;
+
+ db_printf("unp_socket: %p unp_vnode: %p\n", unp->unp_socket,
+ unp->unp_vnode);
+
+ db_printf("unp_ino: %d unp_conn: %p\n", unp->unp_ino,
+ unp->unp_conn);
+
+ db_printf("unp_refs:\n");
+ db_print_unprefs(2, &unp->unp_refs);
+
+ /* XXXRW: Would be nice to print the full address, if any. */
+ db_printf("unp_addr: %p\n", unp->unp_addr);
+
+ db_printf("unp_cc: %d unp_mbcnt: %d unp_gencnt: %llu\n",
+ unp->unp_cc, unp->unp_mbcnt,
+ (unsigned long long)unp->unp_gencnt);
+
+ db_printf("unp_flags: %x (", unp->unp_flags);
+ db_print_unpflags(unp->unp_flags);
+ db_printf(")\n");
+
+ db_printf("unp_peercred:\n");
+ db_print_xucred(2, &unp->unp_peercred);
+
+ db_printf("unp_refcount: %u\n", unp->unp_refcount);
+}
+#endif
diff --git a/freebsd/sys/sys/kernel.h b/freebsd/sys/sys/kernel.h
index c3e8302..1318243 100644
--- a/freebsd/sys/sys/kernel.h
+++ b/freebsd/sys/sys/kernel.h
@@ -265,6 +265,8 @@ struct sysinit {
SYSINIT_REFERENCE(mod ## module)
#define SYSINIT_DRIVER_REFERENCE(driver, bus) \
SYSINIT_MODULE_REFERENCE(driver ## _ ## bus)
+#define SYSINIT_DOMAIN_REFERENCE(dom) \
+ SYSINIT_REFERENCE(domain_add_ ## dom)
#endif /* __rtems__ */
#define SYSINIT(uniquifier, subsystem, order, func, ident) \
diff --git a/freebsd/sys/sys/unpcb.h b/freebsd/sys/sys/unpcb.h
index 4d69f3e..d141b96 100644
--- a/freebsd/sys/sys/unpcb.h
+++ b/freebsd/sys/sys/unpcb.h
@@ -68,7 +68,11 @@ struct unpcb {
LIST_ENTRY(unpcb) unp_link; /* glue on list of all PCBs */
struct socket *unp_socket; /* pointer back to socket */
struct file *unp_file; /* back-pointer to file for gc. */
+#ifndef __rtems__
struct vnode *unp_vnode; /* if associated with file */
+#else /* __rtems__ */
+ struct IMFS_jnode_tt *unp_vnode; /* if associated with file */
+#endif /* __rtems__ */
ino_t unp_ino; /* fake inode number */
struct unpcb *unp_conn; /* control block of connected socket */
struct unp_head unp_refs; /* referencing socket linked list */
diff --git a/libbsd.txt b/libbsd.txt
index 2831a63..7ecb75e 100644
--- a/libbsd.txt
+++ b/libbsd.txt
@@ -111,6 +111,10 @@ the current Git submodule commit is this
* BPF(4): Add support for zero-copy buffers.
+* UNIX(4): Fix race conditions in the area of socket object and file node
+ destruction. Add support for file descriptor transmission via control
+ messages.
+
[listing]
----
/* sysinit section? */
diff --git a/rtemsbsd/include/machine/rtems-bsd-sysinit.h b/rtemsbsd/include/machine/rtems-bsd-sysinit.h
index 6721d41..4d75447 100644
--- a/rtemsbsd/include/machine/rtems-bsd-sysinit.h
+++ b/rtemsbsd/include/machine/rtems-bsd-sysinit.h
@@ -55,6 +55,9 @@
SYSINIT_DRIVER_REFERENCE(pcib, legacy); \
SYSINIT_DRIVER_REFERENCE(pci, pcib);
+#define SYSINIT_NEED_NET_PF_UNIX \
+ SYSINIT_DOMAIN_REFERENCE(local)
+
#define SYSINIT_NEED_NET_IF_BFE \
SYSINIT_DRIVER_REFERENCE(bfe, pci)
diff --git a/testsuite/include/rtems/bsd/test/default-init.h b/testsuite/include/rtems/bsd/test/default-init.h
index 6734a45..ab37ede 100644
--- a/testsuite/include/rtems/bsd/test/default-init.h
+++ b/testsuite/include/rtems/bsd/test/default-init.h
@@ -96,6 +96,8 @@ rtems_task Init(
#include <machine/rtems-bsd-sysinit.h>
+SYSINIT_NEED_NET_PF_UNIX;
+
/* only include FXP and PCI for i386/pc386 for debug on qemu (for now) */
#if defined(i386)
#define CONFIGURE_NEED_PCIB
diff --git a/testsuite/include/rtems/bsd/test/default-network-init.h b/testsuite/include/rtems/bsd/test/default-network-init.h
index 0b851df..959b350 100644
--- a/testsuite/include/rtems/bsd/test/default-network-init.h
+++ b/testsuite/include/rtems/bsd/test/default-network-init.h
@@ -166,6 +166,10 @@ Init(rtems_task_argument arg)
assert(0);
}
+#include <machine/rtems-bsd-sysinit.h>
+
+SYSINIT_NEED_NET_PF_UNIX;
+
#define CONFIGURE_APPLICATION_NEEDS_CLOCK_DRIVER
#define CONFIGURE_APPLICATION_NEEDS_CONSOLE_DRIVER
diff --git a/testsuite/syscalls01/test_main.c b/testsuite/syscalls01/test_main.c
index 907c470..a10f3c7 100644
--- a/testsuite/syscalls01/test_main.c
+++ b/testsuite/syscalls01/test_main.c
@@ -78,7 +78,9 @@ typedef struct {
static socket_test socket_tests[] = {
{ -1, SOCK_RAW, 0, EPROTONOSUPPORT },
{ PF_UNSPEC, SOCK_DGRAM, 0, EPROTONOSUPPORT },
- { PF_UNIX, SOCK_DGRAM, 0, EPROTONOSUPPORT },
+ { PF_UNIX, SOCK_STREAM, 0, 0 },
+ { PF_UNIX, SOCK_DGRAM, 0, 0 },
+ { PF_UNIX, SOCK_SEQPACKET, 0, 0 },
{ PF_INET, -1, 0, EPROTONOSUPPORT },
{ PF_INET, SOCK_RAW, -1, EPROTONOSUPPORT },
{ PF_INET, SOCK_STREAM, 0, 0 },
diff --git a/testsuite/unix01/test_main.c b/testsuite/unix01/test_main.c
new file mode 100644
index 0000000..fe9dde2
--- /dev/null
+++ b/testsuite/unix01/test_main.c
@@ -0,0 +1,251 @@
+/*
+ * Copyright (c) 2014 embedded brains GmbH. All rights reserved.
+ *
+ * embedded brains GmbH
+ * Dornierstr. 4
+ * 82178 Puchheim
+ * Germany
+ * <rtems at embedded-brains.de>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+#include <sys/types.h>
+#include <sys/un.h>
+#include <sys/stat.h>
+#include <sys/socket.h>
+#include <fcntl.h>
+
+#include <assert.h>
+#include <errno.h>
+#include <limits.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <rtems.h>
+#include <rtems/libcsupport.h>
+
+#define TEST_NAME "LIBBSD UNIX 1"
+
+static const char name[] = "unix01.sock";
+
+static void
+test_unix_socket(bool do_resource_check)
+{
+ rtems_resource_snapshot snapshot;
+ int sd;
+ int rv;
+
+ printf("test UNIX(4) socket, %s resource check\n",
+ do_resource_check ? "with" : "without");
+
+ rtems_resource_snapshot_take(&snapshot);
+
+ sd = socket(PF_UNIX, SOCK_STREAM, 0);
+ assert(sd >= 0);
+
+ rv = close(sd);
+ assert(rv == 0);
+
+ if (do_resource_check) {
+ assert(rtems_resource_snapshot_check(&snapshot));
+ }
+}
+
+static void
+test_unix_read_write_not_connected(void)
+{
+ rtems_resource_snapshot snapshot;
+ int sd;
+ int rv;
+ ssize_t n;
+ char buf[1];
+
+ puts("test UNIX(4) read/write not connected");
+
+ rtems_resource_snapshot_take(&snapshot);
+
+ sd = socket(PF_UNIX, SOCK_STREAM, 0);
+ assert(sd >= 0);
+
+ errno = 0;
+ n = write(sd, &buf[0], sizeof(buf));
+ assert(n == -1);
+ assert(errno == ENOTCONN);
+
+ errno = 0;
+ n = read(sd, &buf[0], sizeof(buf));
+ assert(n == -1);
+ assert(errno == ENOTCONN);
+
+ rv = close(sd);
+ assert(rv == 0);
+
+ assert(rtems_resource_snapshot_check(&snapshot));
+}
+
+static void
+init_address(struct sockaddr_un *addr)
+{
+ addr->sun_family = AF_UNIX;
+ strcpy(&addr->sun_path[0], &name[0]);
+}
+
+static void
+test_unix_bind(bool do_close_before_unlink)
+{
+ rtems_resource_snapshot snapshot;
+ int sd;
+ int rv;
+ struct sockaddr_un addr;
+
+ printf("test UNIX(4) bind, %s close before unlink\n",
+ do_close_before_unlink ? "with" : "without");
+
+ rtems_resource_snapshot_take(&snapshot);
+
+ sd = socket(PF_UNIX, SOCK_STREAM, 0);
+ assert(sd >= 0);
+
+ init_address(&addr);
+
+ errno = 0;
+ rv = open(&name[0], O_RDWR);
+ assert(rv == -1);
+ assert(errno == ENOENT);
+
+ rv = bind(sd, (const struct sockaddr *) &addr, SUN_LEN(&addr));
+ assert(rv == 0);
+
+ errno = 0;
+ rv = open(&name[0], O_RDWR);
+ assert(rv == -1);
+ assert(errno == ENXIO);
+
+ if (do_close_before_unlink) {
+ rv = close(sd);
+ assert(rv == 0);
+
+ rv = unlink(&name[0]);
+ assert(rv == 0);
+ } else {
+ rv = unlink(&name[0]);
+ assert(rv == 0);
+
+ rv = close(sd);
+ assert(rv == 0);
+ }
+
+ assert(rtems_resource_snapshot_check(&snapshot));
+}
+
+static void
+test_unix_listen_connect_accept_write_read(void)
+{
+ static const char sd2_to_sd3[] = "some data from sd2 for sd3";
+ static const char sd3_to_sd2[] = "and other data from sd3 for sd2";
+
+ rtems_resource_snapshot snapshot;
+ int sd;
+ int sd2;
+ int sd3;
+ int rv;
+ struct sockaddr_un addr;
+ struct sockaddr_un addr3;
+ socklen_t addr3_len;
+ ssize_t n;
+ char buf[MAX(sizeof(sd2_to_sd3), sizeof(sd3_to_sd2))];
+
+ puts("test UNIX(4) listen/connect/accept/write/read");
+
+ rtems_resource_snapshot_take(&snapshot);
+
+ sd = socket(PF_UNIX, SOCK_STREAM, 0);
+ assert(sd >= 0);
+
+ init_address(&addr);
+
+ rv = bind(sd, (const struct sockaddr *) &addr, SUN_LEN(&addr));
+ assert(rv == 0);
+
+ rv = listen(sd, 0);
+ assert(rv == 0);
+
+ sd2 = socket(PF_UNIX, SOCK_STREAM, 0);
+ assert(sd2 >= 0);
+
+ rv = connect(sd2, (const struct sockaddr *) &addr, SUN_LEN(&addr));
+ assert(rv == 0);
+
+ addr3_len = sizeof(addr3);
+ sd3 = accept(sd, (struct sockaddr *) &addr3, &addr3_len);
+ assert(sd3 >= 0);
+
+ n = write(sd2, &sd2_to_sd3[0], sizeof(sd2_to_sd3));
+ assert(n == (ssize_t) sizeof(sd2_to_sd3));
+
+ n = write(sd3, &sd3_to_sd2[0], sizeof(sd3_to_sd2));
+ assert(n == (ssize_t) sizeof(sd3_to_sd2));
+
+ memset(&buf[0], 'X', sizeof(buf));
+ n = read(sd3, &buf[0], sizeof(buf));
+ assert(n == (ssize_t) sizeof(sd2_to_sd3));
+ assert(memcmp(&sd2_to_sd3[0], &buf[0], sizeof(sd2_to_sd3)) == 0);
+
+ memset(&buf[0], 'X', sizeof(buf));
+ n = read(sd2, &buf[0], sizeof(buf));
+ assert(n == (ssize_t) sizeof(sd3_to_sd2));
+ assert(memcmp(&sd3_to_sd2[0], &buf[0], sizeof(sd3_to_sd2)) == 0);
+
+ rv = close(sd3);
+ assert(rv == 0);
+
+ rv = close(sd2);
+ assert(rv == 0);
+
+ rv = close(sd);
+ assert(rv == 0);
+
+ rv = unlink(&name[0]);
+ assert(rv == 0);
+
+ assert(rtems_resource_snapshot_check(&snapshot));
+}
+
+static void
+test_main(void)
+{
+ test_unix_socket(false);
+ test_unix_socket(true);
+ test_unix_read_write_not_connected();
+ test_unix_bind(false);
+ test_unix_bind(true);
+ test_unix_listen_connect_accept_write_read();
+
+ exit(0);
+}
+
+#include <rtems/bsd/test/default-init.h>
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