VM pressure. The reason is that in some codepaths pointers to stack variables were passed from one thread to another. In collaboration with: pho Reported by: pho's stress2 suite Sponsored by: iXsystems inc.
686 lines
15 KiB
C
686 lines
15 KiB
C
/*-
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* Copyright (c) 2000-2001 Boris Popov
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/condvar.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <sys/mbuf.h>
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#include <sys/poll.h>
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#include <sys/proc.h>
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#include <sys/protosw.h>
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#include <sys/signalvar.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/sx.h>
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#include <sys/sysctl.h>
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#include <sys/systm.h>
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#include <sys/uio.h>
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#include <net/if.h>
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#include <net/route.h>
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#include <netinet/in.h>
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#include <netinet/tcp.h>
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#include <sys/mchain.h>
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#include <netsmb/netbios.h>
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#include <netsmb/smb.h>
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#include <netsmb/smb_conn.h>
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#include <netsmb/smb_tran.h>
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#include <netsmb/smb_trantcp.h>
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#include <netsmb/smb_subr.h>
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#define M_NBDATA M_PCB
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static int smb_tcpsndbuf = NB_SNDQ - 1;
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static int smb_tcprcvbuf = NB_RCVQ - 1;
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SYSCTL_DECL(_net_smb);
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SYSCTL_INT(_net_smb, OID_AUTO, tcpsndbuf, CTLFLAG_RW, &smb_tcpsndbuf, 0, "");
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SYSCTL_INT(_net_smb, OID_AUTO, tcprcvbuf, CTLFLAG_RW, &smb_tcprcvbuf, 0, "");
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#define nb_sosend(so,m,flags,td) sosend(so, NULL, 0, m, 0, flags, td)
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static int nbssn_recv(struct nbpcb *nbp, struct mbuf **mpp, int *lenp,
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u_int8_t *rpcodep, struct thread *td);
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static int smb_nbst_disconnect(struct smb_vc *vcp, struct thread *td);
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static int
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nb_setsockopt_int(struct socket *so, int level, int name, int val)
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{
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struct sockopt sopt;
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bzero(&sopt, sizeof(sopt));
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sopt.sopt_level = level;
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sopt.sopt_name = name;
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sopt.sopt_val = &val;
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sopt.sopt_valsize = sizeof(val);
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return sosetopt(so, &sopt);
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}
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static int
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nb_intr(struct nbpcb *nbp, struct proc *p)
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{
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return 0;
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}
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static int
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nb_upcall(struct socket *so, void *arg, int waitflag)
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{
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struct nbpcb *nbp = arg;
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if (arg == NULL || nbp->nbp_selectid == NULL)
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return (SU_OK);
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wakeup(nbp->nbp_selectid);
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return (SU_OK);
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}
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static int
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nb_sethdr(struct mbuf *m, u_int8_t type, u_int32_t len)
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{
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u_int32_t *p = mtod(m, u_int32_t *);
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*p = htonl((len & 0x1FFFF) | (type << 24));
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return 0;
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}
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static int
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nb_put_name(struct mbchain *mbp, struct sockaddr_nb *snb)
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{
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int error;
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u_char seglen, *cp;
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cp = snb->snb_name;
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if (*cp == 0)
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return EINVAL;
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NBDEBUG("[%s]\n", cp);
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for (;;) {
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seglen = (*cp) + 1;
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error = mb_put_mem(mbp, cp, seglen, MB_MSYSTEM);
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if (error)
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return error;
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if (seglen == 1)
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break;
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cp += seglen;
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}
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return 0;
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}
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static int
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nb_connect_in(struct nbpcb *nbp, struct sockaddr_in *to, struct thread *td)
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{
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struct socket *so;
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int error, s;
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error = socreate(AF_INET, &so, SOCK_STREAM, IPPROTO_TCP,
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td->td_ucred, td);
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if (error)
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return error;
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nbp->nbp_tso = so;
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SOCKBUF_LOCK(&so->so_rcv);
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soupcall_set(so, SO_RCV, nb_upcall, nbp);
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SOCKBUF_UNLOCK(&so->so_rcv);
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so->so_rcv.sb_timeo = (5 * hz);
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so->so_snd.sb_timeo = (5 * hz);
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error = soreserve(so, nbp->nbp_sndbuf, nbp->nbp_rcvbuf);
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if (error)
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goto bad;
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nb_setsockopt_int(so, SOL_SOCKET, SO_KEEPALIVE, 1);
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nb_setsockopt_int(so, IPPROTO_TCP, TCP_NODELAY, 1);
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SOCKBUF_LOCK(&so->so_rcv);
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so->so_rcv.sb_flags &= ~SB_NOINTR;
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SOCKBUF_UNLOCK(&so->so_rcv);
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SOCKBUF_LOCK(&so->so_snd);
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so->so_snd.sb_flags &= ~SB_NOINTR;
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SOCKBUF_UNLOCK(&so->so_snd);
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error = soconnect(so, (struct sockaddr*)to, td);
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if (error)
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goto bad;
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s = splnet();
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while ((so->so_state & SS_ISCONNECTING) && so->so_error == 0) {
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tsleep(&so->so_timeo, PSOCK, "nbcon", 2 * hz);
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if ((so->so_state & SS_ISCONNECTING) && so->so_error == 0 &&
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(error = nb_intr(nbp, td->td_proc)) != 0) {
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so->so_state &= ~SS_ISCONNECTING;
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splx(s);
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goto bad;
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}
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}
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if (so->so_error) {
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error = so->so_error;
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so->so_error = 0;
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splx(s);
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goto bad;
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}
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splx(s);
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return 0;
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bad:
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smb_nbst_disconnect(nbp->nbp_vc, td);
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return error;
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}
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static int
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nbssn_rq_request(struct nbpcb *nbp, struct thread *td)
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{
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struct mbchain *mbp;
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struct mdchain *mdp;
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struct mbuf *m0;
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struct timeval tv;
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struct sockaddr_in sin;
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u_short port;
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u_int8_t rpcode;
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int error, rplen;
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mbp = malloc(sizeof(struct mbchain), M_NBDATA, M_WAITOK);
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mdp = malloc(sizeof(struct mbchain), M_NBDATA, M_WAITOK);
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error = mb_init(mbp);
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if (error) {
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free(mbp, M_NBDATA);
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free(mdp, M_NBDATA);
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return error;
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}
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mb_put_uint32le(mbp, 0);
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nb_put_name(mbp, nbp->nbp_paddr);
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nb_put_name(mbp, nbp->nbp_laddr);
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nb_sethdr(mbp->mb_top, NB_SSN_REQUEST, mb_fixhdr(mbp) - 4);
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error = nb_sosend(nbp->nbp_tso, mbp->mb_top, 0, td);
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if (!error) {
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nbp->nbp_state = NBST_RQSENT;
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}
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mb_detach(mbp);
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mb_done(mbp);
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free(mbp, M_NBDATA);
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if (error) {
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free(mdp, M_NBDATA);
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return error;
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}
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TIMESPEC_TO_TIMEVAL(&tv, &nbp->nbp_timo);
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error = selsocket(nbp->nbp_tso, POLLIN, &tv, td);
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if (error == EWOULDBLOCK) { /* Timeout */
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NBDEBUG("initial request timeout\n");
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free(mdp, M_NBDATA);
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return ETIMEDOUT;
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}
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if (error) { /* restart or interrupt */
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free(mdp, M_NBDATA);
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return error;
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}
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error = nbssn_recv(nbp, &m0, &rplen, &rpcode, td);
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if (error) {
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NBDEBUG("recv() error %d\n", error);
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free(mdp, M_NBDATA);
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return error;
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}
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/*
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* Process NETBIOS reply
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*/
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if (m0)
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md_initm(mdp, m0);
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error = 0;
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do {
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if (rpcode == NB_SSN_POSRESP) {
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nbp->nbp_state = NBST_SESSION;
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nbp->nbp_flags |= NBF_CONNECTED;
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break;
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}
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if (rpcode != NB_SSN_RTGRESP) {
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error = ECONNABORTED;
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break;
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}
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if (rplen != 6) {
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error = ECONNABORTED;
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break;
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}
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md_get_mem(mdp, (caddr_t)&sin.sin_addr, 4, MB_MSYSTEM);
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md_get_uint16(mdp, &port);
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sin.sin_port = port;
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nbp->nbp_state = NBST_RETARGET;
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smb_nbst_disconnect(nbp->nbp_vc, td);
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error = nb_connect_in(nbp, &sin, td);
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if (!error)
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error = nbssn_rq_request(nbp, td);
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if (error) {
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smb_nbst_disconnect(nbp->nbp_vc, td);
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break;
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}
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} while(0);
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if (m0)
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md_done(mdp);
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free(mdp, M_NBDATA);
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return error;
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}
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static int
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nbssn_recvhdr(struct nbpcb *nbp, int *lenp,
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u_int8_t *rpcodep, int flags, struct thread *td)
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{
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struct socket *so = nbp->nbp_tso;
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struct uio auio;
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struct iovec aio;
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u_int32_t len;
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int error;
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aio.iov_base = (caddr_t)&len;
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aio.iov_len = sizeof(len);
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auio.uio_iov = &aio;
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auio.uio_iovcnt = 1;
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auio.uio_segflg = UIO_SYSSPACE;
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auio.uio_rw = UIO_READ;
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auio.uio_offset = 0;
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auio.uio_resid = sizeof(len);
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auio.uio_td = td;
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error = soreceive(so, (struct sockaddr **)NULL, &auio,
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(struct mbuf **)NULL, (struct mbuf **)NULL, &flags);
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if (error)
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return error;
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if (auio.uio_resid > 0) {
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SMBSDEBUG("short reply\n");
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return EPIPE;
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}
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len = ntohl(len);
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*rpcodep = (len >> 24) & 0xFF;
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len &= 0x1ffff;
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if (len > SMB_MAXPKTLEN) {
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SMBERROR("packet too long (%d)\n", len);
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return EFBIG;
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}
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*lenp = len;
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return 0;
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}
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static int
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nbssn_recv(struct nbpcb *nbp, struct mbuf **mpp, int *lenp,
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u_int8_t *rpcodep, struct thread *td)
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{
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struct socket *so = nbp->nbp_tso;
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struct uio auio;
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struct mbuf *m, *tm, *im;
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u_int8_t rpcode;
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int len, resid;
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int error, rcvflg;
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if (so == NULL)
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return ENOTCONN;
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if (mpp)
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*mpp = NULL;
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m = NULL;
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for(;;) {
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/*
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* Poll for a response header.
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* If we don't have one waiting, return.
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*/
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len = 0;
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rpcode = 0;
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error = nbssn_recvhdr(nbp, &len, &rpcode, MSG_DONTWAIT, td);
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if ((so->so_state & (SS_ISDISCONNECTING | SS_ISDISCONNECTED)) ||
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(so->so_rcv.sb_state & SBS_CANTRCVMORE)) {
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nbp->nbp_state = NBST_CLOSED;
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NBDEBUG("session closed by peer\n");
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return ECONNRESET;
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}
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if (error)
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return error;
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if (len == 0 && nbp->nbp_state != NBST_SESSION)
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break;
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/* no data, try again */
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if (rpcode == NB_SSN_KEEPALIVE)
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continue;
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/*
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* Loop, blocking, for data following the response header.
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*
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* Note that we can't simply block here with MSG_WAITALL for the
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* entire response size, as it may be larger than the TCP
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* slow-start window that the sender employs. This will result
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* in the sender stalling until the delayed ACK is sent, then
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* resuming slow-start, resulting in very poor performance.
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*
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* Instead, we never request more than NB_SORECEIVE_CHUNK
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* bytes at a time, resulting in an ack being pushed by
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* the TCP code at the completion of each call.
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*/
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resid = len;
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while (resid > 0) {
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tm = NULL;
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rcvflg = MSG_WAITALL;
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bzero(&auio, sizeof(auio));
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auio.uio_resid = min(resid, NB_SORECEIVE_CHUNK);
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auio.uio_td = td;
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resid -= auio.uio_resid;
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/*
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* Spin until we have collected everything in
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* this chunk.
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*/
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do {
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rcvflg = MSG_WAITALL;
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error = soreceive(so, (struct sockaddr **)NULL,
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&auio, &tm, (struct mbuf **)NULL, &rcvflg);
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} while (error == EWOULDBLOCK || error == EINTR ||
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error == ERESTART);
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if (error)
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goto out;
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/* short return guarantees unhappiness */
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if (auio.uio_resid > 0) {
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SMBERROR("packet is shorter than expected\n");
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error = EPIPE;
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goto out;
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}
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/* append received chunk to previous chunk(s) */
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if (m == NULL) {
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m = tm;
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} else {
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/*
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* Just glue the new chain on the end.
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* Consumer will pullup as required.
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*/
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for (im = m; im->m_next != NULL; im = im->m_next)
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;
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im->m_next = tm;
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}
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}
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/* got a session/message packet? */
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if (nbp->nbp_state == NBST_SESSION &&
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rpcode == NB_SSN_MESSAGE)
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break;
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/* drop packet and try for another */
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NBDEBUG("non-session packet %x\n", rpcode);
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if (m) {
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m_freem(m);
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m = NULL;
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}
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}
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out:
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if (error) {
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if (m)
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m_freem(m);
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return error;
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}
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if (mpp)
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*mpp = m;
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else
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m_freem(m);
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*lenp = len;
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*rpcodep = rpcode;
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return 0;
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}
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/*
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* SMB transport interface
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*/
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static int
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smb_nbst_create(struct smb_vc *vcp, struct thread *td)
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{
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struct nbpcb *nbp;
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nbp = malloc(sizeof *nbp, M_NBDATA, M_WAITOK);
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bzero(nbp, sizeof *nbp);
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nbp->nbp_timo.tv_sec = 15; /* XXX: sysctl ? */
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nbp->nbp_state = NBST_CLOSED;
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nbp->nbp_vc = vcp;
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nbp->nbp_sndbuf = smb_tcpsndbuf;
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nbp->nbp_rcvbuf = smb_tcprcvbuf;
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vcp->vc_tdata = nbp;
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return 0;
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}
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static int
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smb_nbst_done(struct smb_vc *vcp, struct thread *td)
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{
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struct nbpcb *nbp = vcp->vc_tdata;
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if (nbp == NULL)
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return ENOTCONN;
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smb_nbst_disconnect(vcp, td);
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if (nbp->nbp_laddr)
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free(nbp->nbp_laddr, M_SONAME);
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if (nbp->nbp_paddr)
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free(nbp->nbp_paddr, M_SONAME);
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free(nbp, M_NBDATA);
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return 0;
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}
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static int
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smb_nbst_bind(struct smb_vc *vcp, struct sockaddr *sap, struct thread *td)
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{
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struct nbpcb *nbp = vcp->vc_tdata;
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struct sockaddr_nb *snb;
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int error, slen;
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NBDEBUG("\n");
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error = EINVAL;
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do {
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if (nbp->nbp_flags & NBF_LOCADDR)
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break;
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/*
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* It is possible to create NETBIOS name in the kernel,
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* but nothing prevents us to do it in the user space.
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*/
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if (sap == NULL)
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break;
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|
slen = sap->sa_len;
|
|
if (slen < NB_MINSALEN)
|
|
break;
|
|
snb = (struct sockaddr_nb*)sodupsockaddr(sap, M_WAITOK);
|
|
if (snb == NULL) {
|
|
error = ENOMEM;
|
|
break;
|
|
}
|
|
nbp->nbp_laddr = snb;
|
|
nbp->nbp_flags |= NBF_LOCADDR;
|
|
error = 0;
|
|
} while(0);
|
|
return error;
|
|
}
|
|
|
|
static int
|
|
smb_nbst_connect(struct smb_vc *vcp, struct sockaddr *sap, struct thread *td)
|
|
{
|
|
struct nbpcb *nbp = vcp->vc_tdata;
|
|
struct sockaddr_in sin;
|
|
struct sockaddr_nb *snb;
|
|
struct timespec ts1, ts2;
|
|
int error, slen;
|
|
|
|
NBDEBUG("\n");
|
|
if (nbp->nbp_tso != NULL)
|
|
return EISCONN;
|
|
if (nbp->nbp_laddr == NULL)
|
|
return EINVAL;
|
|
slen = sap->sa_len;
|
|
if (slen < NB_MINSALEN)
|
|
return EINVAL;
|
|
if (nbp->nbp_paddr) {
|
|
free(nbp->nbp_paddr, M_SONAME);
|
|
nbp->nbp_paddr = NULL;
|
|
}
|
|
snb = (struct sockaddr_nb*)sodupsockaddr(sap, M_WAITOK);
|
|
if (snb == NULL)
|
|
return ENOMEM;
|
|
nbp->nbp_paddr = snb;
|
|
sin = snb->snb_addrin;
|
|
getnanotime(&ts1);
|
|
error = nb_connect_in(nbp, &sin, td);
|
|
if (error)
|
|
return error;
|
|
getnanotime(&ts2);
|
|
timespecsub(&ts2, &ts1);
|
|
if (ts2.tv_sec == 0) {
|
|
ts2.tv_sec = 1;
|
|
ts2.tv_nsec = 0;
|
|
}
|
|
nbp->nbp_timo = ts2;
|
|
timespecadd(&nbp->nbp_timo, &ts2);
|
|
timespecadd(&nbp->nbp_timo, &ts2);
|
|
timespecadd(&nbp->nbp_timo, &ts2); /* * 4 */
|
|
error = nbssn_rq_request(nbp, td);
|
|
if (error)
|
|
smb_nbst_disconnect(vcp, td);
|
|
return error;
|
|
}
|
|
|
|
static int
|
|
smb_nbst_disconnect(struct smb_vc *vcp, struct thread *td)
|
|
{
|
|
struct nbpcb *nbp = vcp->vc_tdata;
|
|
struct socket *so;
|
|
|
|
if (nbp == NULL || nbp->nbp_tso == NULL)
|
|
return ENOTCONN;
|
|
if ((so = nbp->nbp_tso) != NULL) {
|
|
nbp->nbp_flags &= ~NBF_CONNECTED;
|
|
nbp->nbp_tso = (struct socket *)NULL;
|
|
soshutdown(so, 2);
|
|
soclose(so);
|
|
}
|
|
if (nbp->nbp_state != NBST_RETARGET) {
|
|
nbp->nbp_state = NBST_CLOSED;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
smb_nbst_send(struct smb_vc *vcp, struct mbuf *m0, struct thread *td)
|
|
{
|
|
struct nbpcb *nbp = vcp->vc_tdata;
|
|
int error;
|
|
|
|
if (nbp->nbp_state != NBST_SESSION) {
|
|
error = ENOTCONN;
|
|
goto abort;
|
|
}
|
|
M_PREPEND(m0, 4, M_WAIT);
|
|
nb_sethdr(m0, NB_SSN_MESSAGE, m_fixhdr(m0) - 4);
|
|
error = nb_sosend(nbp->nbp_tso, m0, 0, td);
|
|
return error;
|
|
abort:
|
|
if (m0)
|
|
m_freem(m0);
|
|
return error;
|
|
}
|
|
|
|
|
|
static int
|
|
smb_nbst_recv(struct smb_vc *vcp, struct mbuf **mpp, struct thread *td)
|
|
{
|
|
struct nbpcb *nbp = vcp->vc_tdata;
|
|
u_int8_t rpcode;
|
|
int error, rplen;
|
|
|
|
nbp->nbp_flags |= NBF_RECVLOCK;
|
|
error = nbssn_recv(nbp, mpp, &rplen, &rpcode, td);
|
|
nbp->nbp_flags &= ~NBF_RECVLOCK;
|
|
return error;
|
|
}
|
|
|
|
static void
|
|
smb_nbst_timo(struct smb_vc *vcp)
|
|
{
|
|
return;
|
|
}
|
|
|
|
static void
|
|
smb_nbst_intr(struct smb_vc *vcp)
|
|
{
|
|
struct nbpcb *nbp = vcp->vc_tdata;
|
|
|
|
if (nbp == NULL || nbp->nbp_tso == NULL)
|
|
return;
|
|
sorwakeup(nbp->nbp_tso);
|
|
sowwakeup(nbp->nbp_tso);
|
|
}
|
|
|
|
static int
|
|
smb_nbst_getparam(struct smb_vc *vcp, int param, void *data)
|
|
{
|
|
struct nbpcb *nbp = vcp->vc_tdata;
|
|
|
|
switch (param) {
|
|
case SMBTP_SNDSZ:
|
|
*(int*)data = nbp->nbp_sndbuf;
|
|
break;
|
|
case SMBTP_RCVSZ:
|
|
*(int*)data = nbp->nbp_rcvbuf;
|
|
break;
|
|
case SMBTP_TIMEOUT:
|
|
*(struct timespec*)data = nbp->nbp_timo;
|
|
break;
|
|
default:
|
|
return EINVAL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
smb_nbst_setparam(struct smb_vc *vcp, int param, void *data)
|
|
{
|
|
struct nbpcb *nbp = vcp->vc_tdata;
|
|
|
|
switch (param) {
|
|
case SMBTP_SELECTID:
|
|
nbp->nbp_selectid = data;
|
|
break;
|
|
default:
|
|
return EINVAL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Check for fatal errors
|
|
*/
|
|
static int
|
|
smb_nbst_fatal(struct smb_vc *vcp, int error)
|
|
{
|
|
switch (error) {
|
|
case ENOTCONN:
|
|
case ENETRESET:
|
|
case ECONNABORTED:
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
struct smb_tran_desc smb_tran_nbtcp_desc = {
|
|
SMBT_NBTCP,
|
|
smb_nbst_create, smb_nbst_done,
|
|
smb_nbst_bind, smb_nbst_connect, smb_nbst_disconnect,
|
|
smb_nbst_send, smb_nbst_recv,
|
|
smb_nbst_timo, smb_nbst_intr,
|
|
smb_nbst_getparam, smb_nbst_setparam,
|
|
smb_nbst_fatal
|
|
};
|
|
|