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("$FreeBSD$");
   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 }
  140 
  141 static void
  142 db_print_sostate(short so_state)
  143 {
  144         int comma;
  145 
  146         comma = 0;
  147         if (so_state & SS_NOFDREF) {
  148                 db_printf("%sSS_FDREF", comma ? ", " : "");
  149                 comma = 1;
  150         }
  151         if (so_state & SS_ISCONNECTED) {
  152                 db_printf("%sSS_ISCONNECTED", comma ? ", " : "");
  153                 comma = 1;
  154         }
  155         if (so_state & SS_ISCONNECTING) {
  156                 db_printf("%sSS_ISCONNECTING", comma ? ", " : "");
  157                 comma = 1;
  158         }
  159         if (so_state & SS_ISDISCONNECTING) {
  160                 db_printf("%sSS_ISDISCONNECTING", comma ? ", " : "");
  161                 comma = 1;
  162         }
  163         if (so_state & SS_NBIO) {
  164                 db_printf("%sSS_NBIO", comma ? ", " : "");
  165                 comma = 1;
  166         }
  167         if (so_state & SS_ASYNC) {
  168                 db_printf("%sSS_ASYNC", comma ? ", " : "");
  169                 comma = 1;
  170         }
  171         if (so_state & SS_ISCONFIRMING) {
  172                 db_printf("%sSS_ISCONFIRMING", comma ? ", " : "");
  173                 comma = 1;
  174         }
  175         comma = 0;
  176         if (so_state & SS_PROTOREF) {
  177                 db_printf("%sSS_PROTOREF", comma ? ", " : "");
  178                 comma = 1;
  179         }
  180 }
  181 
  182 static void
  183 db_print_soqstate(int so_qstate)
  184 {
  185         int comma;
  186 
  187         comma = 0;
  188         if (so_qstate & SQ_INCOMP) {
  189                 db_printf("%sSQ_INCOMP", comma ? ", " : "");
  190                 comma = 1;
  191         }
  192         if (so_qstate & SQ_COMP) {
  193                 db_printf("%sSQ_COMP", comma ? ", " : "");
  194                 comma = 1;
  195         }
  196 }
  197 
  198 static void
  199 db_print_sbstate(short sb_state)
  200 {
  201         int comma;
  202 
  203         comma = 0;
  204         if (sb_state & SBS_CANTSENDMORE) {
  205                 db_printf("%sSS_CANTSENDMORE", comma ? ", " : "");
  206                 comma = 1;
  207         }
  208         if (sb_state & SBS_CANTRCVMORE) {
  209                 db_printf("%sSS_CANTRCVMORE", comma ? ", " : "");
  210                 comma = 1;
  211         }
  212         if (sb_state & SBS_RCVATMARK) {
  213                 db_printf("%sSS_RCVATMARK", comma ? ", " : "");
  214                 comma = 1;
  215         }
  216 }
  217 
  218 static void
  219 db_print_indent(int indent)
  220 {
  221         int i;
  222 
  223         for (i = 0; i < indent; i++)
  224                 db_printf(" ");
  225 }
  226 
  227 static void
  228 db_print_domain(struct domain *d, const char *domainname, int indent)
  229 {
  230 
  231         db_print_indent(indent);
  232         db_printf("%s at %p\n", domainname, d);
  233 
  234         indent += 2;
  235 
  236         db_print_indent(indent);
  237         db_printf("dom_family: %d   ", d->dom_family);
  238         db_printf("dom_name: %s\n", d->dom_name);
  239 
  240         db_print_indent(indent);
  241         db_printf("dom_init: %p   ", d->dom_init);
  242         db_printf("dom_externalize: %p   ", d->dom_externalize);
  243         db_printf("dom_dispose: %p\n", d->dom_dispose);
  244 
  245         db_print_indent(indent);
  246         db_printf("dom_protosw: %p   ", d->dom_protosw);
  247         db_printf("dom_next: %p\n", d->dom_next);
  248 
  249         db_print_indent(indent);
  250         db_printf("dom_rtattach: %p   ", d->dom_rtattach);
  251         db_printf("dom_rtoffset: %d   ", d->dom_rtoffset);
  252         db_printf("dom_maxrtkey: %d\n", d->dom_maxrtkey);
  253 
  254         db_print_indent(indent);
  255         db_printf("dom_ifattach: %p   ", d->dom_ifattach);
  256         db_printf("dom_ifdetach: %p\n", d->dom_ifdetach);
  257 }
  258 
  259 static void
  260 db_print_prflags(short pr_flags)
  261 {
  262         int comma;
  263 
  264         comma = 0;
  265         if (pr_flags & PR_ATOMIC) {
  266                 db_printf("%sPR_ATOMIC", comma ? ", " : "");
  267                 comma = 1;
  268         }
  269         if (pr_flags & PR_ADDR) {
  270                 db_printf("%sPR_ADDR", comma ? ", " : "");
  271                 comma = 1;
  272         }
  273         if (pr_flags & PR_CONNREQUIRED) {
  274                 db_printf("%sPR_CONNREQUIRED", comma ? ", " : "");
  275                 comma = 1;
  276         }
  277         if (pr_flags & PR_WANTRCVD) {
  278                 db_printf("%sPR_WANTRCVD", comma ? ", " : "");
  279                 comma = 1;
  280         }
  281         if (pr_flags & PR_RIGHTS) {
  282                 db_printf("%sPR_RIGHTS", comma ? ", " : "");
  283                 comma = 1;
  284         }
  285         if (pr_flags & PR_IMPLOPCL) {
  286                 db_printf("%sPR_IMPLOPCL", comma ? ", " : "");
  287                 comma = 1;
  288         }
  289         if (pr_flags & PR_LASTHDR) {
  290                 db_printf("%sPR_LASTHDR", comma ? ", " : "");
  291                 comma = 1;
  292         }
  293 }
  294 
  295 static void
  296 db_print_protosw(struct protosw *pr, const char *prname, int indent)
  297 {
  298 
  299         db_print_indent(indent);
  300         db_printf("%s at %p\n", prname, pr);
  301 
  302         indent += 2;
  303 
  304         db_print_indent(indent);
  305         db_printf("pr_type: %d   ", pr->pr_type);
  306         db_printf("pr_domain: %p\n", pr->pr_domain);
  307         if (pr->pr_domain != NULL)
  308                 db_print_domain(pr->pr_domain, "pr_domain", indent);
  309 
  310         db_print_indent(indent);
  311         db_printf("pr_protocol: %d\n", pr->pr_protocol);
  312 
  313         db_print_indent(indent);
  314         db_printf("pr_flags: %d (", pr->pr_flags);
  315         db_print_prflags(pr->pr_flags);
  316         db_printf(")\n");
  317 
  318         db_print_indent(indent);
  319         db_printf("pr_input: %p   ", pr->pr_input);
  320         db_printf("pr_output: %p   ", pr->pr_output);
  321         db_printf("pr_ctlinput: %p\n", pr->pr_ctlinput);
  322 
  323         db_print_indent(indent);
  324         db_printf("pr_ctloutput: %p   ", pr->pr_ctloutput);
  325         db_printf("pr_ousrreq: %p   ", pr->pr_ousrreq);
  326         db_printf("pr_init: %p\n", pr->pr_init);
  327 
  328         db_print_indent(indent);
  329         db_printf("pr_fasttimo: %p   ", pr->pr_fasttimo);
  330         db_printf("pr_slowtimo: %p   ", pr->pr_slowtimo);
  331         db_printf("pr_drain: %p\n", pr->pr_drain);
  332 
  333         db_print_indent(indent);
  334         db_printf("pr_ousrreq: %p\n", pr->pr_ousrreq);
  335 }
  336 
  337 static void
  338 db_print_sbflags(short sb_flags)
  339 {
  340         int comma;
  341 
  342         comma = 0;
  343         if (sb_flags & SB_WAIT) {
  344                 db_printf("%sSB_WAIT", comma ? ", " : "");
  345                 comma = 1;
  346         }
  347         if (sb_flags & SB_SEL) {
  348                 db_printf("%sSB_SEL", comma ? ", " : "");
  349                 comma = 1;
  350         }
  351         if (sb_flags & SB_ASYNC) {
  352                 db_printf("%sSB_ASYNC", comma ? ", " : "");
  353                 comma = 1;
  354         }
  355         if (sb_flags & SB_UPCALL) {
  356                 db_printf("%sSB_UPCALL", comma ? ", " : "");
  357                 comma = 1;
  358         }
  359         if (sb_flags & SB_NOINTR) {
  360                 db_printf("%sSB_NOINTR", comma ? ", " : "");
  361                 comma = 1;
  362         }
  363         if (sb_flags & SB_AIO) {
  364                 db_printf("%sSB_AIO", comma ? ", " : "");
  365                 comma = 1;
  366         }
  367         if (sb_flags & SB_KNOTE) {
  368                 db_printf("%sSB_KNOTE", comma ? ", " : "");
  369                 comma = 1;
  370         }
  371         if (sb_flags & SB_AUTOSIZE) {
  372                 db_printf("%sSB_AUTOSIZE", comma ? ", " : "");
  373                 comma = 1;
  374         }
  375 }
  376 
  377 static void
  378 db_print_sockbuf(struct sockbuf *sb, const char *sockbufname, int indent)
  379 {
  380 
  381         db_print_indent(indent);
  382         db_printf("%s at %p\n", sockbufname, sb);
  383 
  384         indent += 2;
  385 
  386         db_print_indent(indent);
  387         db_printf("sb_state: 0x%x (", sb->sb_state);
  388         db_print_sbstate(sb->sb_state);
  389         db_printf(")\n");
  390 
  391         db_print_indent(indent);
  392         db_printf("sb_mb: %p   ", sb->sb_mb);
  393         db_printf("sb_mbtail: %p   ", sb->sb_mbtail);
  394         db_printf("sb_lastrecord: %p\n", sb->sb_lastrecord);
  395 
  396         db_print_indent(indent);
  397         db_printf("sb_sndptr: %p   ", sb->sb_sndptr);
  398         db_printf("sb_sndptroff: %u\n", sb->sb_sndptroff);
  399 
  400         db_print_indent(indent);
  401         db_printf("sb_cc: %u   ", sb->sb_cc);
  402         db_printf("sb_hiwat: %u   ", sb->sb_hiwat);
  403         db_printf("sb_mbcnt: %u   ", sb->sb_mbcnt);
  404         db_printf("sb_mbmax: %u\n", sb->sb_mbmax);
  405 
  406         db_print_indent(indent);
  407         db_printf("sb_ctl: %u   ", sb->sb_ctl);
  408         db_printf("sb_lowat: %d   ", sb->sb_lowat);
  409         db_printf("sb_timeo: %d\n", sb->sb_timeo);
  410 
  411         db_print_indent(indent);
  412         db_printf("sb_flags: 0x%x (", sb->sb_flags);
  413         db_print_sbflags(sb->sb_flags);
  414         db_printf(")\n");
  415 }
  416 
  417 static void
  418 db_print_socket(struct socket *so, const char *socketname, int indent)
  419 {
  420 
  421         db_print_indent(indent);
  422         db_printf("%s at %p\n", socketname, so);
  423 
  424         indent += 2;
  425 
  426         db_print_indent(indent);
  427         db_printf("so_count: %d   ", so->so_count);
  428         db_printf("so_type: %d (", so->so_type);
  429         db_print_sotype(so->so_type);
  430         db_printf(")\n");
  431 
  432         db_print_indent(indent);
  433         db_printf("so_options: 0x%x (", so->so_options);
  434         db_print_sooptions(so->so_options);
  435         db_printf(")\n");
  436 
  437         db_print_indent(indent);
  438         db_printf("so_linger: %d   ", so->so_linger);
  439         db_printf("so_state: 0x%x (", so->so_state);
  440         db_print_sostate(so->so_state);
  441         db_printf(")\n");
  442 
  443         db_print_indent(indent);
  444         db_printf("so_qstate: 0x%x (", so->so_qstate);
  445         db_print_soqstate(so->so_qstate);
  446         db_printf(")   ");
  447         db_printf("so_pcb: %p   ", so->so_pcb);
  448         db_printf("so_proto: %p\n", so->so_proto);
  449 
  450         if (so->so_proto != NULL)
  451                 db_print_protosw(so->so_proto, "so_proto", indent);
  452 
  453         db_print_indent(indent);
  454         db_printf("so_head: %p   ", so->so_head);
  455         db_printf("so_incomp first: %p   ", TAILQ_FIRST(&so->so_incomp));
  456         db_printf("so_comp first: %p\n", TAILQ_FIRST(&so->so_comp));
  457 
  458         db_print_indent(indent);
  459         /* so_list skipped */
  460         db_printf("so_qlen: %d   ", so->so_qlen);
  461         db_printf("so_incqlen: %d   ", so->so_incqlen);
  462         db_printf("so_qlimit: %d   ", so->so_qlimit);
  463         db_printf("so_timeo: %d   ", so->so_timeo);
  464         db_printf("so_error: %d\n", so->so_error);
  465 
  466         db_print_indent(indent);
  467         db_printf("so_sigio: %p   ", so->so_sigio);
  468         db_printf("so_oobmark: %lu   ", so->so_oobmark);
  469         db_printf("so_aiojobq first: %p\n", TAILQ_FIRST(&so->so_aiojobq));
  470 
  471         db_print_sockbuf(&so->so_rcv, "so_rcv", indent);
  472         db_print_sockbuf(&so->so_snd, "so_snd", indent);
  473 }
  474 
  475 DB_SHOW_COMMAND(socket, db_show_socket)
  476 {
  477         struct socket *so;
  478 
  479         if (!have_addr) {
  480                 db_printf("usage: show socket <addr>\n");
  481                 return;
  482         }
  483         so = (struct socket *)addr;
  484 
  485         db_print_socket(so, "socket", 0);
  486 }
  487 
  488 DB_SHOW_COMMAND(sockbuf, db_show_sockbuf)
  489 {
  490         struct sockbuf *sb;
  491 
  492         if (!have_addr) {
  493                 db_printf("usage: show sockbuf <addr>\n");
  494                 return;
  495         }
  496         sb = (struct sockbuf *)addr;
  497 
  498         db_print_sockbuf(sb, "sockbuf", 0);
  499 }
  500 
  501 DB_SHOW_COMMAND(protosw, db_show_protosw)
  502 {
  503         struct protosw *pr;
  504 
  505         if (!have_addr) {
  506                 db_printf("usage: show protosw <addr>\n");
  507                 return;
  508         }
  509         pr = (struct protosw *)addr;
  510 
  511         db_print_protosw(pr, "protosw", 0);
  512 }
  513 
  514 DB_SHOW_COMMAND(domain, db_show_domain)
  515 {
  516         struct domain *d;
  517 
  518         if (!have_addr) {
  519                 db_printf("usage: show protosw <addr>\n");
  520                 return;
  521         }
  522         d = (struct domain *)addr;
  523 
  524         db_print_domain(d, "domain", 0);
  525 }
  526 #endif

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