streams.c revision 89306
143410Snewton/* 243410Snewton * Copyright (c) 1998 Mark Newton 343410Snewton * Copyright (c) 1994 Christos Zoulas 443410Snewton * Copyright (c) 1997 Todd Vierling 543410Snewton * All rights reserved. 643410Snewton * 743410Snewton * Redistribution and use in source and binary forms, with or without 843410Snewton * modification, are permitted provided that the following conditions 943410Snewton * are met: 1043410Snewton * 1. Redistributions of source code must retain the above copyright 1143410Snewton * notice, this list of conditions and the following disclaimer. 1243410Snewton * 2. Redistributions in binary form must reproduce the above copyright 1343410Snewton * notice, this list of conditions and the following disclaimer in the 1443410Snewton * documentation and/or other materials provided with the distribution. 1543410Snewton * 3. The names of the authors may not be used to endorse or promote products 1643410Snewton * derived from this software without specific prior written permission 1743410Snewton * 1843410Snewton * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 1943410Snewton * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 2043410Snewton * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 2143410Snewton * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 2243410Snewton * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 2343410Snewton * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 2443410Snewton * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 2543410Snewton * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 2643410Snewton * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 2743410Snewton * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 2843410Snewton * 2943410Snewton * Stolen from NetBSD /sys/compat/svr4/svr4_net.c. Pseudo-device driver 3043410Snewton * skeleton produced from /usr/share/examples/drivers/make_pseudo_driver.sh 3143410Snewton * in 3.0-980524-SNAP then hacked a bit (but probably not enough :-). 3249263Snewton * 3350477Speter * $FreeBSD: head/sys/dev/streams/streams.c 89306 2002-01-13 11:58:06Z alfred $ 3443410Snewton */ 3543410Snewton 3643410Snewton#include <sys/param.h> 3743410Snewton#include <sys/systm.h> 3843410Snewton#include <sys/kernel.h> /* SYSINIT stuff */ 3943410Snewton#include <sys/conf.h> /* cdevsw stuff */ 4043410Snewton#include <sys/malloc.h> /* malloc region definitions */ 4143410Snewton#include <sys/file.h> 4243410Snewton#include <sys/filedesc.h> 4343410Snewton#include <sys/unistd.h> 4443410Snewton#include <sys/fcntl.h> 4543410Snewton#include <sys/socket.h> 4643410Snewton#include <sys/protosw.h> 4743410Snewton#include <sys/socketvar.h> 4843410Snewton#include <sys/un.h> 4943410Snewton#include <sys/domain.h> 5043410Snewton#include <net/if.h> 5143410Snewton#include <netinet/in.h> 5243410Snewton#include <sys/proc.h> 5343410Snewton#include <sys/uio.h> 5443410Snewton 5543410Snewton#include <sys/sysproto.h> 5643410Snewton 5765314Sobrien#include <compat/svr4/svr4_types.h> 5865314Sobrien#include <compat/svr4/svr4_util.h> 5965314Sobrien#include <compat/svr4/svr4_signal.h> 6065314Sobrien#include <compat/svr4/svr4_ioctl.h> 6165314Sobrien#include <compat/svr4/svr4_stropts.h> 6265314Sobrien#include <compat/svr4/svr4_socket.h> 6343410Snewton 6483366Sjulianstatic int svr4_soo_close __P((struct file *, struct thread *)); 6583366Sjulianstatic int svr4_ptm_alloc __P((struct thread *)); 6643410Snewtonstatic d_open_t streamsopen; 6743410Snewton 6843410Snewtonstruct svr4_sockcache_entry { 6943410Snewton struct proc *p; /* Process for the socket */ 7043410Snewton void *cookie; /* Internal cookie used for matching */ 7143410Snewton struct sockaddr_un sock;/* Pathname for the socket */ 7243410Snewton dev_t dev; /* Device where the socket lives on */ 7343410Snewton ino_t ino; /* Inode where the socket lives on */ 7460938Sjake TAILQ_ENTRY(svr4_sockcache_entry) entries; 7543410Snewton}; 7643410Snewton 7760938SjakeTAILQ_HEAD(svr4_sockcache_head, svr4_sockcache_entry) svr4_head; 7843410Snewton 7943410Snewton/* Initialization flag (set/queried by svr4_mod LKM) */ 8043410Snewtonint svr4_str_initialized = 0; 8143410Snewton 8243410Snewton/* 8343410Snewton * Device minor numbers 8443410Snewton */ 8543410Snewtonenum { 8643410Snewton dev_ptm = 10, 8743410Snewton dev_arp = 26, 8843410Snewton dev_icmp = 27, 8943410Snewton dev_ip = 28, 9043410Snewton dev_tcp = 35, 9143410Snewton dev_udp = 36, 9243410Snewton dev_rawip = 37, 9343410Snewton dev_unix_dgram = 38, 9443410Snewton dev_unix_stream = 39, 9543410Snewton dev_unix_ord_stream = 40 9643410Snewton}; 9743410Snewton 9889059Smsmithstatic dev_t dt_ptm, dt_arp, dt_icmp, dt_ip, dt_tcp, dt_udp, dt_rawip, 9952114Snewton dt_unix_dgram, dt_unix_stream, dt_unix_ord_stream; 10052114Snewton 10143410Snewtonstatic struct fileops svr4_netops = { 10272521Sjlemon soo_read, soo_write, soo_ioctl, soo_poll, sokqfilter, 10372521Sjlemon soo_stat, svr4_soo_close 10443410Snewton}; 10543410Snewton 10643410Snewton#define CDEV_MAJOR 103 10743410Snewtonstatic struct cdevsw streams_cdevsw = { 10847625Sphk /* open */ streamsopen, 10947625Sphk /* close */ noclose, 11047625Sphk /* read */ noread, 11147625Sphk /* write */ nowrite, 11247625Sphk /* ioctl */ noioctl, 11347625Sphk /* poll */ nopoll, 11447625Sphk /* mmap */ nommap, 11547625Sphk /* strategy */ nostrategy, 11647625Sphk /* name */ "streams", 11747625Sphk /* maj */ CDEV_MAJOR, 11847625Sphk /* dump */ nodump, 11947625Sphk /* psize */ nopsize, 12047625Sphk /* flags */ 0, 12147625Sphk}; 12243410Snewton 12343410Snewtonstruct streams_softc { 12443410Snewton struct isa_device *dev; 12543410Snewton} ; 12643410Snewton 12743410Snewton#define UNIT(dev) minor(dev) /* assume one minor number per unit */ 12843410Snewton 12943410Snewtontypedef struct streams_softc *sc_p; 13043410Snewton 13144208Snewtonstatic int 13244208Snewtonstreams_modevent(module_t mod, int type, void *unused) 13344208Snewton{ 13444208Snewton switch (type) { 13544208Snewton case MOD_LOAD: 13649344Snewton /* XXX should make sure it isn't already loaded first */ 13752114Snewton dt_ptm = make_dev(&streams_cdevsw, dev_ptm, 0, 0, 0666, 13852114Snewton "ptm"); 13952114Snewton dt_arp = make_dev(&streams_cdevsw, dev_arp, 0, 0, 0666, 14052114Snewton "arp"); 14152114Snewton dt_icmp = make_dev(&streams_cdevsw, dev_icmp, 0, 0, 0666, 14252114Snewton "icmp"); 14352114Snewton dt_ip = make_dev(&streams_cdevsw, dev_ip, 0, 0, 0666, 14452114Snewton "ip"); 14552114Snewton dt_tcp = make_dev(&streams_cdevsw, dev_tcp, 0, 0, 0666, 14652114Snewton "tcp"); 14752114Snewton dt_udp = make_dev(&streams_cdevsw, dev_udp, 0, 0, 0666, 14852114Snewton "udp"); 14952114Snewton dt_rawip = make_dev(&streams_cdevsw, dev_rawip, 0, 0, 0666, 15052114Snewton "rawip"); 15152114Snewton dt_unix_dgram = make_dev(&streams_cdevsw, dev_unix_dgram, 15252114Snewton 0, 0, 0666, "ticlts"); 15352114Snewton dt_unix_stream = make_dev(&streams_cdevsw, dev_unix_stream, 15452114Snewton 0, 0, 0666, "ticots"); 15552114Snewton dt_unix_ord_stream = make_dev(&streams_cdevsw, 15652114Snewton dev_unix_ord_stream, 0, 0, 0666, "ticotsord"); 15752114Snewton 15852114Snewton if (! (dt_ptm && dt_arp && dt_icmp && dt_ip && dt_tcp && 15952114Snewton dt_udp && dt_rawip && dt_unix_dgram && 16052114Snewton dt_unix_stream && dt_unix_ord_stream)) { 16152114Snewton printf("WARNING: device config for STREAMS failed\n"); 16252114Snewton printf("Suggest unloading streams KLD\n"); 16352114Snewton } 16444208Snewton return 0; 16544208Snewton case MOD_UNLOAD: 16649344Snewton /* XXX should check to see if it's busy first */ 16753000Sphk destroy_dev(dt_ptm); 16853000Sphk destroy_dev(dt_arp); 16953000Sphk destroy_dev(dt_icmp); 17053000Sphk destroy_dev(dt_ip); 17153000Sphk destroy_dev(dt_tcp); 17253000Sphk destroy_dev(dt_udp); 17353000Sphk destroy_dev(dt_rawip); 17453000Sphk destroy_dev(dt_unix_dgram); 17553000Sphk destroy_dev(dt_unix_stream); 17653000Sphk destroy_dev(dt_unix_ord_stream); 17752114Snewton 17844208Snewton return 0; 17944208Snewton default: 18044208Snewton break; 18144208Snewton } 18244208Snewton return 0; 18344208Snewton} 18444208Snewton 18544208Snewtonstatic moduledata_t streams_mod = { 18644208Snewton "streams", 18744208Snewton streams_modevent, 18844208Snewton 0 18944208Snewton}; 19044208SnewtonDECLARE_MODULE(streams, streams_mod, SI_SUB_DRIVERS, SI_ORDER_ANY); 19160060SgreenMODULE_VERSION(streams, 1); 19244208Snewton 19343410Snewton/* 19443410Snewton * We only need open() and close() routines. open() calls socreate() 19543410Snewton * to allocate a "real" object behind the stream and mallocs some state 19643410Snewton * info for use by the svr4 emulator; close() deallocates the state 19743410Snewton * information and passes the underlying object to the normal socket close 19843410Snewton * routine. 19943410Snewton */ 20043410Snewtonstatic int 20183366Sjulianstreamsopen(dev_t dev, int oflags, int devtype, struct thread *td) 20243410Snewton{ 20343410Snewton int type, protocol; 20443410Snewton int fd; 20543410Snewton struct file *fp; 20643410Snewton struct socket *so; 20743410Snewton int error; 20843410Snewton int family; 20983366Sjulian struct proc *p = td->td_proc; 21043410Snewton 21171448Sjhb PROC_LOCK(p); 21283366Sjulian if (td->td_dupfd >= 0) { 21371448Sjhb PROC_UNLOCK(p); 21443410Snewton return ENODEV; 21571448Sjhb } 21671448Sjhb PROC_UNLOCK(p); 21743410Snewton 21843410Snewton switch (minor(dev)) { 21943410Snewton case dev_udp: 22043410Snewton family = AF_INET; 22143410Snewton type = SOCK_DGRAM; 22243410Snewton protocol = IPPROTO_UDP; 22343410Snewton break; 22443410Snewton 22543410Snewton case dev_tcp: 22643410Snewton family = AF_INET; 22743410Snewton type = SOCK_STREAM; 22843410Snewton protocol = IPPROTO_TCP; 22943410Snewton break; 23043410Snewton 23143410Snewton case dev_ip: 23243410Snewton case dev_rawip: 23343410Snewton family = AF_INET; 23443410Snewton type = SOCK_RAW; 23543410Snewton protocol = IPPROTO_IP; 23643410Snewton break; 23743410Snewton 23843410Snewton case dev_icmp: 23943410Snewton family = AF_INET; 24043410Snewton type = SOCK_RAW; 24143410Snewton protocol = IPPROTO_ICMP; 24243410Snewton break; 24343410Snewton 24443410Snewton case dev_unix_dgram: 24543410Snewton family = AF_LOCAL; 24643410Snewton type = SOCK_DGRAM; 24743410Snewton protocol = 0; 24843410Snewton break; 24943410Snewton 25043410Snewton case dev_unix_stream: 25143410Snewton case dev_unix_ord_stream: 25243410Snewton family = AF_LOCAL; 25343410Snewton type = SOCK_STREAM; 25443410Snewton protocol = 0; 25543410Snewton break; 25643410Snewton 25743410Snewton case dev_ptm: 25883366Sjulian return svr4_ptm_alloc(td); 25943410Snewton 26043410Snewton default: 26143410Snewton return EOPNOTSUPP; 26243410Snewton } 26343410Snewton 26483366Sjulian if ((error = falloc(td, &fp, &fd)) != 0) 26543410Snewton return error; 26643410Snewton 26788739Srwatson if ((error = socreate(family, &so, type, protocol, 26888739Srwatson td->td_proc->p_ucred, td)) != 0) { 26989306Salfred FILEDESC_LOCK(p->p_fd); 27043410Snewton p->p_fd->fd_ofiles[fd] = 0; 27189306Salfred FILEDESC_UNLOCK(p->p_fd); 27243410Snewton ffree(fp); 27343410Snewton return error; 27443410Snewton } 27543410Snewton 27689306Salfred FILEDESC_LOCK(p->p_fd); 27749413Sgreen fp->f_data = (caddr_t)so; 27843410Snewton fp->f_flag = FREAD|FWRITE; 27949413Sgreen fp->f_ops = &svr4_netops; 28043410Snewton fp->f_type = DTYPE_SOCKET; 28189306Salfred FILEDESC_UNLOCK(p->p_fd); 28243410Snewton 28343410Snewton (void)svr4_stream_get(fp); 28471448Sjhb PROC_LOCK(p); 28583366Sjulian td->td_dupfd = fd; 28671448Sjhb PROC_UNLOCK(p); 28743410Snewton return ENXIO; 28843410Snewton} 28943410Snewton 29043410Snewtonstatic int 29183366Sjuliansvr4_ptm_alloc(td) 29283366Sjulian struct thread *td; 29343410Snewton{ 29483366Sjulian struct proc *p = td->td_proc; 29543410Snewton /* 29643410Snewton * XXX this is very, very ugly. But I can't find a better 29743410Snewton * way that won't duplicate a big amount of code from 29843410Snewton * sys_open(). Ho hum... 29943410Snewton * 30043410Snewton * Fortunately for us, Solaris (at least 2.5.1) makes the 30143410Snewton * /dev/ptmx open automatically just open a pty, that (after 30243410Snewton * STREAMS I_PUSHes), is just a plain pty. fstat() is used 30343410Snewton * to get the minor device number to map to a tty. 30443410Snewton * 30543410Snewton * Cycle through the names. If sys_open() returns ENOENT (or 30643410Snewton * ENXIO), short circuit the cycle and exit. 30743410Snewton */ 30843410Snewton static char ptyname[] = "/dev/ptyXX"; 30943410Snewton static char ttyletters[] = "pqrstuwxyzPQRST"; 31043410Snewton static char ttynumbers[] = "0123456789abcdef"; 31143410Snewton caddr_t sg = stackgap_init(); 31243410Snewton char *path = stackgap_alloc(&sg, sizeof(ptyname)); 31343410Snewton struct open_args oa; 31443410Snewton int l = 0, n = 0; 31543410Snewton register_t fd = -1; 31643410Snewton int error; 31743410Snewton 31843410Snewton SCARG(&oa, path) = path; 31943410Snewton SCARG(&oa, flags) = O_RDWR; 32043410Snewton SCARG(&oa, mode) = 0; 32143410Snewton 32243410Snewton while (fd == -1) { 32343410Snewton ptyname[8] = ttyletters[l]; 32443410Snewton ptyname[9] = ttynumbers[n]; 32543410Snewton 32643410Snewton if ((error = copyout(ptyname, path, sizeof(ptyname))) != 0) 32743410Snewton return error; 32843410Snewton 32983366Sjulian switch (error = open(td, &oa)) { 33043410Snewton case ENOENT: 33143410Snewton case ENXIO: 33243410Snewton return error; 33343410Snewton case 0: 33471448Sjhb PROC_LOCK(p); 33583366Sjulian td->td_dupfd = td->td_retval[0]; 33671448Sjhb PROC_UNLOCK(p); 33743410Snewton return ENXIO; 33843410Snewton default: 33943410Snewton if (ttynumbers[++n] == '\0') { 34043410Snewton if (ttyletters[++l] == '\0') 34143410Snewton break; 34243410Snewton n = 0; 34343410Snewton } 34443410Snewton } 34543410Snewton } 34643410Snewton return ENOENT; 34743410Snewton} 34843410Snewton 34943410Snewton 35043410Snewtonstruct svr4_strm * 35143410Snewtonsvr4_stream_get(fp) 35243410Snewton struct file *fp; 35343410Snewton{ 35443410Snewton struct socket *so; 35543410Snewton struct svr4_strm *st; 35643410Snewton 35743410Snewton if (fp == NULL || fp->f_type != DTYPE_SOCKET) 35843410Snewton return NULL; 35943410Snewton 36043410Snewton so = (struct socket *) fp->f_data; 36143410Snewton 36289306Salfred /* 36389306Salfred * mpfixme: lock socketbuffer here 36489306Salfred */ 36589306Salfred if (so->so_emuldata) { 36643410Snewton return so->so_emuldata; 36789306Salfred } 36843410Snewton 36943410Snewton /* Allocate a new one. */ 37043410Snewton st = malloc(sizeof(struct svr4_strm), M_TEMP, M_WAITOK); 37143410Snewton st->s_family = so->so_proto->pr_domain->dom_family; 37243410Snewton st->s_cmd = ~0; 37343410Snewton st->s_afd = -1; 37443410Snewton st->s_eventmask = 0; 37589306Salfred /* 37689306Salfred * avoid a race where we loose due to concurrancy issues 37789306Salfred * of two threads trying to allocate the so_emuldata. 37889306Salfred */ 37989306Salfred if (so->so_emuldata) { 38089306Salfred /* lost the race, use the existing emuldata */ 38189306Salfred FREE(st, M_TEMP); 38289306Salfred st = so->so_emuldata; 38389306Salfred } else { 38489306Salfred /* we won, or there was no race, use our copy */ 38589306Salfred so->so_emuldata = st; 38689306Salfred fp->f_ops = &svr4_netops; 38789306Salfred } 38843410Snewton 38943410Snewton return st; 39043410Snewton} 39143410Snewton 39243410Snewtonvoid 39343410Snewtonsvr4_delete_socket(p, fp) 39443410Snewton struct proc *p; 39543410Snewton struct file *fp; 39643410Snewton{ 39743410Snewton struct svr4_sockcache_entry *e; 39843410Snewton void *cookie = ((struct socket *) fp->f_data)->so_emuldata; 39943410Snewton 40071448Sjhb while (svr4_str_initialized != 2) { 40171448Sjhb if (atomic_cmpset_acq_int(&svr4_str_initialized, 0, 1)) { 40271448Sjhb TAILQ_INIT(&svr4_head); 40371448Sjhb atomic_store_rel_int(&svr4_str_initialized, 2); 40471448Sjhb } 40543410Snewton return; 40643410Snewton } 40743410Snewton 40871448Sjhb TAILQ_FOREACH(e, &svr4_head, entries) 40943410Snewton if (e->p == p && e->cookie == cookie) { 41043410Snewton TAILQ_REMOVE(&svr4_head, e, entries); 41143410Snewton DPRINTF(("svr4_delete_socket: %s [%p,%d,%d]\n", 41285653Sdillon e->sock.sun_path, p, (int)e->dev, e->ino)); 41343410Snewton free(e, M_TEMP); 41443410Snewton return; 41543410Snewton } 41643410Snewton} 41743410Snewton 41843410Snewtonstatic int 41983366Sjuliansvr4_soo_close(struct file *fp, struct thread *td) 42043410Snewton{ 42143410Snewton struct socket *so = (struct socket *)fp->f_data; 42243410Snewton 42343410Snewton /* CHECKUNIT_DIAG(ENXIO);*/ 42443410Snewton 42583366Sjulian svr4_delete_socket(td->td_proc, fp); 42643410Snewton free(so->so_emuldata, M_TEMP); 42783366Sjulian return soo_close(fp, td); 42843410Snewton} 429