The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/kern/uipc_debug.c

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    1 /*-
    2  * Copyright (c) 2007 Robert N. M. Watson
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  */
   26 
   27 /*
   28  * Debugger routines relating to sockets, protocols, etc, for use in DDB.
   29  */
   30 
   31 #include <sys/cdefs.h>
   32 __FBSDID("$FreeBSD: releng/8.3/sys/kern/uipc_debug.c 199583 2009-11-20 15:27:52Z jhb $");
   33 
   34 #include "opt_ddb.h"
   35 
   36 #include <sys/param.h>
   37 #include <sys/domain.h>
   38 #include <sys/kernel.h>
   39 #include <sys/protosw.h>
   40 #include <sys/socket.h>
   41 #include <sys/socketvar.h>
   42 
   43 #ifdef DDB
   44 #include <ddb/ddb.h>
   45 
   46 static void
   47 db_print_sotype(short so_type)
   48 {
   49 
   50         switch (so_type) {
   51         case SOCK_STREAM:
   52                 db_printf("SOCK_STREAM");
   53                 break;
   54 
   55         case SOCK_DGRAM:
   56                 db_printf("SOCK_DGRAM");
   57                 break;
   58 
   59         case SOCK_RAW:
   60                 db_printf("SOCK_RAW");
   61                 break;
   62 
   63         case SOCK_RDM:
   64                 db_printf("SOCK_RDM");
   65                 break;
   66 
   67         case SOCK_SEQPACKET:
   68                 db_printf("SOCK_SEQPACKET");
   69                 break;
   70 
   71         default:
   72                 db_printf("unknown");
   73                 break;
   74         }
   75 }
   76 
   77 static void
   78 db_print_sooptions(short so_options)
   79 {
   80         int comma;
   81 
   82         comma = 0;
   83         if (so_options & SO_DEBUG) {
   84                 db_printf("%sSO_DEBUG", comma ? ", " : "");
   85                 comma = 1;
   86         }
   87         if (so_options & SO_ACCEPTCONN) {
   88                 db_printf("%sSO_ACCEPTCONN", comma ? ", " : "");
   89                 comma = 1;
   90         }
   91         if (so_options & SO_REUSEADDR) {
   92                 db_printf("%sSO_REUSEADDR", comma ? ", " : "");
   93                 comma = 1;
   94         }
   95         if (so_options & SO_KEEPALIVE) {
   96                 db_printf("%sSO_KEEPALIVE", comma ? ", " : "");
   97                 comma = 1;
   98         }
   99         if (so_options & SO_DONTROUTE) {
  100                 db_printf("%sSO_DONTROUTE", comma ? ", " : "");
  101                 comma = 1;
  102         }
  103         if (so_options & SO_BROADCAST) {
  104                 db_printf("%sSO_BROADCAST", comma ? ", " : "");
  105                 comma = 1;
  106         }
  107         if (so_options & SO_USELOOPBACK) {
  108                 db_printf("%sSO_USELOOPBACK", comma ? ", " : "");
  109                 comma = 1;
  110         }
  111         if (so_options & SO_LINGER) {
  112                 db_printf("%sSO_LINGER", comma ? ", " : "");
  113                 comma = 1;
  114         }
  115         if (so_options & SO_OOBINLINE) {
  116                 db_printf("%sSO_OOBINLINE", comma ? ", " : "");
  117                 comma = 1;
  118         }
  119         if (so_options & SO_REUSEPORT) {
  120                 db_printf("%sSO_REUSEPORT", comma ? ", " : "");
  121                 comma = 1;
  122         }
  123         if (so_options & SO_TIMESTAMP) {
  124                 db_printf("%sSO_TIMESTAMP", comma ? ", " : "");
  125                 comma = 1;
  126         }
  127         if (so_options & SO_NOSIGPIPE) {
  128                 db_printf("%sSO_NOSIGPIPE", comma ? ", " : "");
  129                 comma = 1;
  130         }
  131         if (so_options & SO_ACCEPTFILTER) {
  132                 db_printf("%sSO_ACCEPTFILTER", comma ? ", " : "");
  133                 comma = 1;
  134         }
  135         if (so_options & SO_BINTIME) {
  136                 db_printf("%sSO_BINTIME", comma ? ", " : "");
  137                 comma = 1;
  138         }
  139         if (so_options & SO_NO_OFFLOAD) {
  140                 db_printf("%sSO_NO_OFFLOAD", comma ? ", " : "");
  141                 comma = 1;
  142         }
  143         if (so_options & SO_NO_DDP) {
  144                 db_printf("%sSO_NO_DDP", comma ? ", " : "");
  145                 comma = 1;
  146         }
  147 }
  148 
  149 static void
  150 db_print_sostate(short so_state)
  151 {
  152         int comma;
  153 
  154         comma = 0;
  155         if (so_state & SS_NOFDREF) {
  156                 db_printf("%sSS_NOFDREF", comma ? ", " : "");
  157                 comma = 1;
  158         }
  159         if (so_state & SS_ISCONNECTED) {
  160                 db_printf("%sSS_ISCONNECTED", comma ? ", " : "");
  161                 comma = 1;
  162         }
  163         if (so_state & SS_ISCONNECTING) {
  164                 db_printf("%sSS_ISCONNECTING", comma ? ", " : "");
  165                 comma = 1;
  166         }
  167         if (so_state & SS_ISDISCONNECTING) {
  168                 db_printf("%sSS_ISDISCONNECTING", comma ? ", " : "");
  169                 comma = 1;
  170         }
  171         if (so_state & SS_NBIO) {
  172                 db_printf("%sSS_NBIO", comma ? ", " : "");
  173                 comma = 1;
  174         }
  175         if (so_state & SS_ASYNC) {
  176                 db_printf("%sSS_ASYNC", comma ? ", " : "");
  177                 comma = 1;
  178         }
  179         if (so_state & SS_ISCONFIRMING) {
  180                 db_printf("%sSS_ISCONFIRMING", comma ? ", " : "");
  181                 comma = 1;
  182         }
  183         if (so_state & SS_PROTOREF) {
  184                 db_printf("%sSS_PROTOREF", comma ? ", " : "");
  185                 comma = 1;
  186         }
  187 }
  188 
  189 static void
  190 db_print_soqstate(int so_qstate)
  191 {
  192         int comma;
  193 
  194         comma = 0;
  195         if (so_qstate & SQ_INCOMP) {
  196                 db_printf("%sSQ_INCOMP", comma ? ", " : "");
  197                 comma = 1;
  198         }
  199         if (so_qstate & SQ_COMP) {
  200                 db_printf("%sSQ_COMP", comma ? ", " : "");
  201                 comma = 1;
  202         }
  203 }
  204 
  205 static void
  206 db_print_sbstate(short sb_state)
  207 {
  208         int comma;
  209 
  210         comma = 0;
  211         if (sb_state & SBS_CANTSENDMORE) {
  212                 db_printf("%sSS_CANTSENDMORE", comma ? ", " : "");
  213                 comma = 1;
  214         }
  215         if (sb_state & SBS_CANTRCVMORE) {
  216                 db_printf("%sSS_CANTRCVMORE", comma ? ", " : "");
  217                 comma = 1;
  218         }
  219         if (sb_state & SBS_RCVATMARK) {
  220                 db_printf("%sSS_RCVATMARK", comma ? ", " : "");
  221                 comma = 1;
  222         }
  223 }
  224 
  225 static void
  226 db_print_indent(int indent)
  227 {
  228         int i;
  229 
  230         for (i = 0; i < indent; i++)
  231                 db_printf(" ");
  232 }
  233 
  234 static void
  235 db_print_domain(struct domain *d, const char *domain_name, int indent)
  236 {
  237 
  238         db_print_indent(indent);
  239         db_printf("%s at %p\n", domain_name, d);
  240 
  241         indent += 2;
  242 
  243         db_print_indent(indent);
  244         db_printf("dom_family: %d   ", d->dom_family);
  245         db_printf("dom_name: %s\n", d->dom_name);
  246 
  247         db_print_indent(indent);
  248         db_printf("dom_init: %p   ", d->dom_init);
  249         db_printf("dom_externalize: %p   ", d->dom_externalize);
  250         db_printf("dom_dispose: %p\n", d->dom_dispose);
  251 
  252         db_print_indent(indent);
  253         db_printf("dom_protosw: %p   ", d->dom_protosw);
  254         db_printf("dom_next: %p\n", d->dom_next);
  255 
  256         db_print_indent(indent);
  257         db_printf("dom_rtattach: %p   ", d->dom_rtattach);
  258         db_printf("dom_rtoffset: %d   ", d->dom_rtoffset);
  259         db_printf("dom_maxrtkey: %d\n", d->dom_maxrtkey);
  260 
  261         db_print_indent(indent);
  262         db_printf("dom_ifattach: %p   ", d->dom_ifattach);
  263         db_printf("dom_ifdetach: %p\n", d->dom_ifdetach);
  264 }
  265 
  266 static void
  267 db_print_prflags(short pr_flags)
  268 {
  269         int comma;
  270 
  271         comma = 0;
  272         if (pr_flags & PR_ATOMIC) {
  273                 db_printf("%sPR_ATOMIC", comma ? ", " : "");
  274                 comma = 1;
  275         }
  276         if (pr_flags & PR_ADDR) {
  277                 db_printf("%sPR_ADDR", comma ? ", " : "");
  278                 comma = 1;
  279         }
  280         if (pr_flags & PR_CONNREQUIRED) {
  281                 db_printf("%sPR_CONNREQUIRED", comma ? ", " : "");
  282                 comma = 1;
  283         }
  284         if (pr_flags & PR_WANTRCVD) {
  285                 db_printf("%sPR_WANTRCVD", comma ? ", " : "");
  286                 comma = 1;
  287         }
  288         if (pr_flags & PR_RIGHTS) {
  289                 db_printf("%sPR_RIGHTS", comma ? ", " : "");
  290                 comma = 1;
  291         }
  292         if (pr_flags & PR_IMPLOPCL) {
  293                 db_printf("%sPR_IMPLOPCL", comma ? ", " : "");
  294                 comma = 1;
  295         }
  296         if (pr_flags & PR_LASTHDR) {
  297                 db_printf("%sPR_LASTHDR", comma ? ", " : "");
  298                 comma = 1;
  299         }
  300 }
  301 
  302 static void
  303 db_print_protosw(struct protosw *pr, const char *prname, int indent)
  304 {
  305 
  306         db_print_indent(indent);
  307         db_printf("%s at %p\n", prname, pr);
  308 
  309         indent += 2;
  310 
  311         db_print_indent(indent);
  312         db_printf("pr_type: %d   ", pr->pr_type);
  313         db_printf("pr_domain: %p\n", pr->pr_domain);
  314         if (pr->pr_domain != NULL)
  315                 db_print_domain(pr->pr_domain, "pr_domain", indent);
  316 
  317         db_print_indent(indent);
  318         db_printf("pr_protocol: %d\n", pr->pr_protocol);
  319 
  320         db_print_indent(indent);
  321         db_printf("pr_flags: %d (", pr->pr_flags);
  322         db_print_prflags(pr->pr_flags);
  323         db_printf(")\n");
  324 
  325         db_print_indent(indent);
  326         db_printf("pr_input: %p   ", pr->pr_input);
  327         db_printf("pr_output: %p   ", pr->pr_output);
  328         db_printf("pr_ctlinput: %p\n", pr->pr_ctlinput);
  329 
  330         db_print_indent(indent);
  331         db_printf("pr_ctloutput: %p   ", pr->pr_ctloutput);
  332         db_printf("pr_init: %p\n", pr->pr_init);
  333 
  334         db_print_indent(indent);
  335         db_printf("pr_fasttimo: %p   ", pr->pr_fasttimo);
  336         db_printf("pr_slowtimo: %p   ", pr->pr_slowtimo);
  337         db_printf("pr_drain: %p\n", pr->pr_drain);
  338 
  339         db_print_indent(indent);
  340 }
  341 
  342 static void
  343 db_print_sbflags(short sb_flags)
  344 {
  345         int comma;
  346 
  347         comma = 0;
  348         if (sb_flags & SB_WAIT) {
  349                 db_printf("%sSB_WAIT", comma ? ", " : "");
  350                 comma = 1;
  351         }
  352         if (sb_flags & SB_SEL) {
  353                 db_printf("%sSB_SEL", comma ? ", " : "");
  354                 comma = 1;
  355         }
  356         if (sb_flags & SB_ASYNC) {
  357                 db_printf("%sSB_ASYNC", comma ? ", " : "");
  358                 comma = 1;
  359         }
  360         if (sb_flags & SB_UPCALL) {
  361                 db_printf("%sSB_UPCALL", comma ? ", " : "");
  362                 comma = 1;
  363         }
  364         if (sb_flags & SB_NOINTR) {
  365                 db_printf("%sSB_NOINTR", comma ? ", " : "");
  366                 comma = 1;
  367         }
  368         if (sb_flags & SB_AIO) {
  369                 db_printf("%sSB_AIO", comma ? ", " : "");
  370                 comma = 1;
  371         }
  372         if (sb_flags & SB_KNOTE) {
  373                 db_printf("%sSB_KNOTE", comma ? ", " : "");
  374                 comma = 1;
  375         }
  376         if (sb_flags & SB_AUTOSIZE) {
  377                 db_printf("%sSB_AUTOSIZE", comma ? ", " : "");
  378                 comma = 1;
  379         }
  380 }
  381 
  382 static void
  383 db_print_sockbuf(struct sockbuf *sb, const char *sockbufname, int indent)
  384 {
  385 
  386         db_print_indent(indent);
  387         db_printf("%s at %p\n", sockbufname, sb);
  388 
  389         indent += 2;
  390 
  391         db_print_indent(indent);
  392         db_printf("sb_state: 0x%x (", sb->sb_state);
  393         db_print_sbstate(sb->sb_state);
  394         db_printf(")\n");
  395 
  396         db_print_indent(indent);
  397         db_printf("sb_mb: %p   ", sb->sb_mb);
  398         db_printf("sb_mbtail: %p   ", sb->sb_mbtail);
  399         db_printf("sb_lastrecord: %p\n", sb->sb_lastrecord);
  400 
  401         db_print_indent(indent);
  402         db_printf("sb_sndptr: %p   ", sb->sb_sndptr);
  403         db_printf("sb_sndptroff: %u\n", sb->sb_sndptroff);
  404 
  405         db_print_indent(indent);
  406         db_printf("sb_cc: %u   ", sb->sb_cc);
  407         db_printf("sb_hiwat: %u   ", sb->sb_hiwat);
  408         db_printf("sb_mbcnt: %u   ", sb->sb_mbcnt);
  409         db_printf("sb_mbmax: %u\n", sb->sb_mbmax);
  410 
  411         db_print_indent(indent);
  412         db_printf("sb_ctl: %u   ", sb->sb_ctl);
  413         db_printf("sb_lowat: %d   ", sb->sb_lowat);
  414         db_printf("sb_timeo: %d\n", sb->sb_timeo);
  415 
  416         db_print_indent(indent);
  417         db_printf("sb_flags: 0x%x (", sb->sb_flags);
  418         db_print_sbflags(sb->sb_flags);
  419         db_printf(")\n");
  420 }
  421 
  422 static void
  423 db_print_socket(struct socket *so, const char *socketname, int indent)
  424 {
  425 
  426         db_print_indent(indent);
  427         db_printf("%s at %p\n", socketname, so);
  428 
  429         indent += 2;
  430 
  431         db_print_indent(indent);
  432         db_printf("so_count: %d   ", so->so_count);
  433         db_printf("so_type: %d (", so->so_type);
  434         db_print_sotype(so->so_type);
  435         db_printf(")\n");
  436 
  437         db_print_indent(indent);
  438         db_printf("so_options: 0x%x (", so->so_options);
  439         db_print_sooptions(so->so_options);
  440         db_printf(")\n");
  441 
  442         db_print_indent(indent);
  443         db_printf("so_linger: %d   ", so->so_linger);
  444         db_printf("so_state: 0x%x (", so->so_state);
  445         db_print_sostate(so->so_state);
  446         db_printf(")\n");
  447 
  448         db_print_indent(indent);
  449         db_printf("so_qstate: 0x%x (", so->so_qstate);
  450         db_print_soqstate(so->so_qstate);
  451         db_printf(")   ");
  452         db_printf("so_pcb: %p   ", so->so_pcb);
  453         db_printf("so_proto: %p\n", so->so_proto);
  454 
  455         if (so->so_proto != NULL)
  456                 db_print_protosw(so->so_proto, "so_proto", indent);
  457 
  458         db_print_indent(indent);
  459         db_printf("so_head: %p   ", so->so_head);
  460         db_printf("so_incomp first: %p   ", TAILQ_FIRST(&so->so_incomp));
  461         db_printf("so_comp first: %p\n", TAILQ_FIRST(&so->so_comp));
  462 
  463         db_print_indent(indent);
  464         /* so_list skipped */
  465         db_printf("so_qlen: %d   ", so->so_qlen);
  466         db_printf("so_incqlen: %d   ", so->so_incqlen);
  467         db_printf("so_qlimit: %d   ", so->so_qlimit);
  468         db_printf("so_timeo: %d   ", so->so_timeo);
  469         db_printf("so_error: %d\n", so->so_error);
  470 
  471         db_print_indent(indent);
  472         db_printf("so_sigio: %p   ", so->so_sigio);
  473         db_printf("so_oobmark: %lu   ", so->so_oobmark);
  474         db_printf("so_aiojobq first: %p\n", TAILQ_FIRST(&so->so_aiojobq));
  475 
  476         db_print_sockbuf(&so->so_rcv, "so_rcv", indent);
  477         db_print_sockbuf(&so->so_snd, "so_snd", indent);
  478 }
  479 
  480 DB_SHOW_COMMAND(socket, db_show_socket)
  481 {
  482         struct socket *so;
  483 
  484         if (!have_addr) {
  485                 db_printf("usage: show socket <addr>\n");
  486                 return;
  487         }
  488         so = (struct socket *)addr;
  489 
  490         db_print_socket(so, "socket", 0);
  491 }
  492 
  493 DB_SHOW_COMMAND(sockbuf, db_show_sockbuf)
  494 {
  495         struct sockbuf *sb;
  496 
  497         if (!have_addr) {
  498                 db_printf("usage: show sockbuf <addr>\n");
  499                 return;
  500         }
  501         sb = (struct sockbuf *)addr;
  502 
  503         db_print_sockbuf(sb, "sockbuf", 0);
  504 }
  505 
  506 DB_SHOW_COMMAND(protosw, db_show_protosw)
  507 {
  508         struct protosw *pr;
  509 
  510         if (!have_addr) {
  511                 db_printf("usage: show protosw <addr>\n");
  512                 return;
  513         }
  514         pr = (struct protosw *)addr;
  515 
  516         db_print_protosw(pr, "protosw", 0);
  517 }
  518 
  519 DB_SHOW_COMMAND(domain, db_show_domain)
  520 {
  521         struct domain *d;
  522 
  523         if (!have_addr) {
  524                 db_printf("usage: show protosw <addr>\n");
  525                 return;
  526         }
  527         d = (struct domain *)addr;
  528 
  529         db_print_domain(d, "domain", 0);
  530 }
  531 #endif

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