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/compat/linux/linux_ipc.c

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    1 /*-
    2  * Copyright (c) 1994-1995 Søren Schmidt
    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  *    in this position and unchanged.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  * 3. The name of the author may not be used to endorse or promote products
   15  *    derived from this software without specific prior written permission
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   27  */
   28 
   29 #include <sys/cdefs.h>
   30 __FBSDID("$FreeBSD: releng/6.1/sys/compat/linux/linux_ipc.c 141691 2005-02-11 13:46:55Z sobomax $");
   31 
   32 #include <sys/param.h>
   33 #include <sys/systm.h>
   34 #include <sys/syscallsubr.h>
   35 #include <sys/sysproto.h>
   36 #include <sys/proc.h>
   37 #include <sys/limits.h>
   38 #include <sys/msg.h>
   39 #include <sys/sem.h>
   40 #include <sys/shm.h>
   41 
   42 #include "opt_compat.h"
   43 
   44 #ifdef COMPAT_LINUX32
   45 #include <machine/../linux32/linux.h>
   46 #include <machine/../linux32/linux32_proto.h>
   47 #include <machine/../linux32/linux32_ipc64.h>
   48 #else
   49 #include <machine/../linux/linux.h>
   50 #include <machine/../linux/linux_proto.h>
   51 #include <machine/../linux/linux_ipc64.h>
   52 #endif
   53 #include <compat/linux/linux_ipc.h>
   54 #include <compat/linux/linux_util.h>
   55 
   56 struct l_seminfo {
   57         l_int semmap;
   58         l_int semmni;
   59         l_int semmns;
   60         l_int semmnu;
   61         l_int semmsl;
   62         l_int semopm;
   63         l_int semume;
   64         l_int semusz;
   65         l_int semvmx;
   66         l_int semaem;
   67 };
   68 
   69 struct l_shminfo {
   70         l_int shmmax;
   71         l_int shmmin;
   72         l_int shmmni;
   73         l_int shmseg;
   74         l_int shmall;
   75 };
   76 
   77 struct l_shm_info {
   78         l_int used_ids;
   79         l_ulong shm_tot;  /* total allocated shm */
   80         l_ulong shm_rss;  /* total resident shm */
   81         l_ulong shm_swp;  /* total swapped shm */
   82         l_ulong swap_attempts;
   83         l_ulong swap_successes;
   84 };
   85 
   86 static void
   87 bsd_to_linux_shminfo( struct shminfo *bpp, struct l_shminfo *lpp)
   88 {
   89         lpp->shmmax = bpp->shmmax;
   90         lpp->shmmin = bpp->shmmin;
   91         lpp->shmmni = bpp->shmmni;
   92         lpp->shmseg = bpp->shmseg;
   93         lpp->shmall = bpp->shmall;
   94 }
   95 
   96 static void
   97 bsd_to_linux_shm_info( struct shm_info *bpp, struct l_shm_info *lpp)
   98 {
   99         lpp->used_ids = bpp->used_ids ;
  100         lpp->shm_tot = bpp->shm_tot ;
  101         lpp->shm_rss = bpp->shm_rss ;
  102         lpp->shm_swp = bpp->shm_swp ;
  103         lpp->swap_attempts = bpp->swap_attempts ;
  104         lpp->swap_successes = bpp->swap_successes ;
  105 }
  106 
  107 struct l_ipc_perm {
  108         l_key_t         key;
  109         l_uid16_t       uid;
  110         l_gid16_t       gid;
  111         l_uid16_t       cuid;
  112         l_gid16_t       cgid;
  113         l_ushort        mode;
  114         l_ushort        seq;
  115 };
  116 
  117 static void
  118 linux_to_bsd_ipc_perm(struct l_ipc_perm *lpp, struct ipc_perm *bpp)
  119 {
  120     bpp->key = lpp->key;
  121     bpp->uid = lpp->uid;
  122     bpp->gid = lpp->gid;
  123     bpp->cuid = lpp->cuid;
  124     bpp->cgid = lpp->cgid;
  125     bpp->mode = lpp->mode;
  126     bpp->seq = lpp->seq;
  127 }
  128 
  129 
  130 static void
  131 bsd_to_linux_ipc_perm(struct ipc_perm *bpp, struct l_ipc_perm *lpp)
  132 {
  133     lpp->key = bpp->key;
  134     lpp->uid = bpp->uid;
  135     lpp->gid = bpp->gid;
  136     lpp->cuid = bpp->cuid;
  137     lpp->cgid = bpp->cgid;
  138     lpp->mode = bpp->mode;
  139     lpp->seq = bpp->seq;
  140 }
  141 
  142 struct l_msqid_ds {
  143         struct l_ipc_perm       msg_perm;
  144         l_uintptr_t             msg_first;      /* first message on queue,unused */
  145         l_uintptr_t             msg_last;       /* last message in queue,unused */
  146         l_time_t                msg_stime;      /* last msgsnd time */
  147         l_time_t                msg_rtime;      /* last msgrcv time */
  148         l_time_t                msg_ctime;      /* last change time */
  149         l_ulong                 msg_lcbytes;    /* Reuse junk fields for 32 bit */
  150         l_ulong                 msg_lqbytes;    /* ditto */
  151         l_ushort                msg_cbytes;     /* current number of bytes on queue */
  152         l_ushort                msg_qnum;       /* number of messages in queue */
  153         l_ushort                msg_qbytes;     /* max number of bytes on queue */
  154         l_pid_t                 msg_lspid;      /* pid of last msgsnd */
  155         l_pid_t                 msg_lrpid;      /* last receive pid */
  156 }
  157 #if defined(__amd64__) && defined(COMPAT_LINUX32)
  158 __packed
  159 #endif
  160 ;
  161 
  162 struct l_semid_ds {
  163         struct l_ipc_perm       sem_perm;
  164         l_time_t                sem_otime;
  165         l_time_t                sem_ctime;
  166         l_uintptr_t             sem_base;
  167         l_uintptr_t             sem_pending;
  168         l_uintptr_t             sem_pending_last;
  169         l_uintptr_t             undo;
  170         l_ushort                sem_nsems;
  171 }
  172 #if defined(__amd64__) && defined(COMPAT_LINUX32)
  173 __packed
  174 #endif
  175 ;
  176 
  177 struct l_shmid_ds {
  178         struct l_ipc_perm       shm_perm;
  179         l_int                   shm_segsz;
  180         l_time_t                shm_atime;
  181         l_time_t                shm_dtime;
  182         l_time_t                shm_ctime;
  183         l_ushort                shm_cpid;
  184         l_ushort                shm_lpid;
  185         l_short                 shm_nattch;
  186         l_ushort                private1;
  187         l_uintptr_t             private2;
  188         l_uintptr_t             private3;
  189 };
  190 
  191 static void
  192 linux_to_bsd_semid_ds(struct l_semid_ds *lsp, struct semid_ds *bsp)
  193 {
  194     linux_to_bsd_ipc_perm(&lsp->sem_perm, &bsp->sem_perm);
  195     bsp->sem_otime = lsp->sem_otime;
  196     bsp->sem_ctime = lsp->sem_ctime;
  197     bsp->sem_nsems = lsp->sem_nsems;
  198     bsp->sem_base = PTRIN(lsp->sem_base);
  199 }
  200 
  201 static void
  202 bsd_to_linux_semid_ds(struct semid_ds *bsp, struct l_semid_ds *lsp)
  203 {
  204         bsd_to_linux_ipc_perm(&bsp->sem_perm, &lsp->sem_perm);
  205         lsp->sem_otime = bsp->sem_otime;
  206         lsp->sem_ctime = bsp->sem_ctime;
  207         lsp->sem_nsems = bsp->sem_nsems;
  208         lsp->sem_base = PTROUT(bsp->sem_base);
  209 }
  210 
  211 static void
  212 linux_to_bsd_shmid_ds(struct l_shmid_ds *lsp, struct shmid_ds *bsp)
  213 {
  214     linux_to_bsd_ipc_perm(&lsp->shm_perm, &bsp->shm_perm);
  215     bsp->shm_segsz = lsp->shm_segsz;
  216     bsp->shm_lpid = lsp->shm_lpid;
  217     bsp->shm_cpid = lsp->shm_cpid;
  218     bsp->shm_nattch = lsp->shm_nattch;
  219     bsp->shm_atime = lsp->shm_atime;
  220     bsp->shm_dtime = lsp->shm_dtime;
  221     bsp->shm_ctime = lsp->shm_ctime;
  222     /* this goes (yet) SOS */
  223     bsp->shm_internal = PTRIN(lsp->private3);
  224 }
  225 
  226 static void
  227 bsd_to_linux_shmid_ds(struct shmid_ds *bsp, struct l_shmid_ds *lsp)
  228 {
  229     bsd_to_linux_ipc_perm(&bsp->shm_perm, &lsp->shm_perm);
  230     lsp->shm_segsz = bsp->shm_segsz;
  231     lsp->shm_lpid = bsp->shm_lpid;
  232     lsp->shm_cpid = bsp->shm_cpid;
  233     lsp->shm_nattch = bsp->shm_nattch;
  234     lsp->shm_atime = bsp->shm_atime;
  235     lsp->shm_dtime = bsp->shm_dtime;
  236     lsp->shm_ctime = bsp->shm_ctime;
  237     /* this goes (yet) SOS */
  238     lsp->private3 = PTROUT(bsp->shm_internal);
  239 }
  240 
  241 static void
  242 linux_to_bsd_msqid_ds(struct l_msqid_ds *lsp, struct msqid_ds *bsp)
  243 {
  244     linux_to_bsd_ipc_perm(&lsp->msg_perm, &bsp->msg_perm);
  245     bsp->msg_cbytes = lsp->msg_cbytes;
  246     bsp->msg_qnum = lsp->msg_qnum;
  247     bsp->msg_qbytes = lsp->msg_qbytes;
  248     bsp->msg_lspid = lsp->msg_lspid;
  249     bsp->msg_lrpid = lsp->msg_lrpid;
  250     bsp->msg_stime = lsp->msg_stime;
  251     bsp->msg_rtime = lsp->msg_rtime;
  252     bsp->msg_ctime = lsp->msg_ctime;
  253 }
  254 
  255 static void
  256 bsd_to_linux_msqid_ds(struct msqid_ds *bsp, struct l_msqid_ds *lsp)
  257 {
  258     bsd_to_linux_ipc_perm(&bsp->msg_perm, &lsp->msg_perm);
  259     lsp->msg_cbytes = bsp->msg_cbytes;
  260     lsp->msg_qnum = bsp->msg_qnum;
  261     lsp->msg_qbytes = bsp->msg_qbytes;
  262     lsp->msg_lspid = bsp->msg_lspid;
  263     lsp->msg_lrpid = bsp->msg_lrpid;
  264     lsp->msg_stime = bsp->msg_stime;
  265     lsp->msg_rtime = bsp->msg_rtime;
  266     lsp->msg_ctime = bsp->msg_ctime;
  267 }
  268 
  269 static void
  270 linux_ipc_perm_to_ipc64_perm(struct l_ipc_perm *in, struct l_ipc64_perm *out)
  271 {
  272 
  273         /* XXX: do we really need to do something here? */
  274         out->key = in->key;
  275         out->uid = in->uid;
  276         out->gid = in->gid;
  277         out->cuid = in->cuid;
  278         out->cgid = in->cgid;
  279         out->mode = in->mode;
  280         out->seq = in->seq;
  281 }
  282 
  283 static int
  284 linux_msqid_pullup(l_int ver, struct l_msqid_ds *linux_msqid, caddr_t uaddr)
  285 {
  286         struct l_msqid64_ds linux_msqid64;
  287         int error;
  288 
  289         if (ver == LINUX_IPC_64) {
  290                 error = copyin(uaddr, &linux_msqid64, sizeof(linux_msqid64));
  291                 if (error != 0)
  292                         return (error);
  293 
  294                 bzero(linux_msqid, sizeof(*linux_msqid));
  295 
  296                 linux_msqid->msg_perm.uid = linux_msqid64.msg_perm.uid;
  297                 linux_msqid->msg_perm.gid = linux_msqid64.msg_perm.gid;
  298                 linux_msqid->msg_perm.mode = linux_msqid64.msg_perm.mode;
  299 
  300                 if (linux_msqid64.msg_qbytes > USHRT_MAX)
  301                         linux_msqid->msg_lqbytes = linux_msqid64.msg_qbytes;
  302                 else
  303                         linux_msqid->msg_qbytes = linux_msqid64.msg_qbytes;
  304         } else {
  305                 error = copyin(uaddr, linux_msqid, sizeof(*linux_msqid));
  306         }
  307         return (error);
  308 }
  309 
  310 static int
  311 linux_msqid_pushdown(l_int ver, struct l_msqid_ds *linux_msqid, caddr_t uaddr)
  312 {
  313         struct l_msqid64_ds linux_msqid64;
  314 
  315         if (ver == LINUX_IPC_64) {
  316                 bzero(&linux_msqid64, sizeof(linux_msqid64));
  317 
  318                 linux_ipc_perm_to_ipc64_perm(&linux_msqid->msg_perm,
  319                     &linux_msqid64.msg_perm);
  320 
  321                 linux_msqid64.msg_stime = linux_msqid->msg_stime;
  322                 linux_msqid64.msg_rtime = linux_msqid->msg_rtime;
  323                 linux_msqid64.msg_ctime = linux_msqid->msg_ctime;
  324 
  325                 if (linux_msqid->msg_cbytes == 0)
  326                         linux_msqid64.msg_cbytes = linux_msqid->msg_lcbytes;
  327                 else
  328                         linux_msqid64.msg_cbytes = linux_msqid->msg_cbytes;
  329 
  330                 linux_msqid64.msg_qnum = linux_msqid->msg_qnum;
  331 
  332                 if (linux_msqid->msg_qbytes == 0)
  333                         linux_msqid64.msg_qbytes = linux_msqid->msg_lqbytes;
  334                 else
  335                         linux_msqid64.msg_qbytes = linux_msqid->msg_qbytes;
  336 
  337                 linux_msqid64.msg_lspid = linux_msqid->msg_lspid;
  338                 linux_msqid64.msg_lrpid = linux_msqid->msg_lrpid;
  339 
  340                 return (copyout(&linux_msqid64, uaddr, sizeof(linux_msqid64)));
  341         } else {
  342                 return (copyout(linux_msqid, uaddr, sizeof(*linux_msqid)));
  343         }
  344 }
  345 
  346 static int
  347 linux_semid_pullup(l_int ver, struct l_semid_ds *linux_semid, caddr_t uaddr)
  348 {
  349         struct l_semid64_ds linux_semid64;
  350         int error;
  351 
  352         if (ver == LINUX_IPC_64) {
  353                 error = copyin(uaddr, &linux_semid64, sizeof(linux_semid64));
  354                 if (error != 0)
  355                         return (error);
  356 
  357                 bzero(linux_semid, sizeof(*linux_semid));
  358 
  359                 linux_semid->sem_perm.uid = linux_semid64.sem_perm.uid;
  360                 linux_semid->sem_perm.gid = linux_semid64.sem_perm.gid;
  361                 linux_semid->sem_perm.mode = linux_semid64.sem_perm.mode;
  362         } else {
  363                 error = copyin(uaddr, linux_semid, sizeof(*linux_semid));
  364         }
  365         return (error);
  366 }
  367 
  368 static int
  369 linux_semid_pushdown(l_int ver, struct l_semid_ds *linux_semid, caddr_t uaddr)
  370 {
  371         struct l_semid64_ds linux_semid64;
  372 
  373         if (ver == LINUX_IPC_64) {
  374                 bzero(&linux_semid64, sizeof(linux_semid64));
  375 
  376                 linux_ipc_perm_to_ipc64_perm(&linux_semid->sem_perm,
  377                     &linux_semid64.sem_perm);
  378 
  379                 linux_semid64.sem_otime = linux_semid->sem_otime;
  380                 linux_semid64.sem_ctime = linux_semid->sem_ctime;
  381                 linux_semid64.sem_nsems = linux_semid->sem_nsems;
  382 
  383                 return (copyout(&linux_semid64, uaddr, sizeof(linux_semid64)));
  384         } else {
  385                 return (copyout(linux_semid, uaddr, sizeof(*linux_semid)));
  386         }
  387 }
  388 
  389 static int
  390 linux_shmid_pullup(l_int ver, struct l_shmid_ds *linux_shmid, caddr_t uaddr)
  391 {
  392         struct l_shmid64_ds linux_shmid64;
  393         int error;
  394 
  395         if (ver == LINUX_IPC_64) {
  396                 error = copyin(uaddr, &linux_shmid64, sizeof(linux_shmid64));
  397                 if (error != 0)
  398                         return (error);
  399 
  400                 bzero(linux_shmid, sizeof(*linux_shmid));
  401 
  402                 linux_shmid->shm_perm.uid = linux_shmid64.shm_perm.uid;
  403                 linux_shmid->shm_perm.gid = linux_shmid64.shm_perm.gid;
  404                 linux_shmid->shm_perm.mode = linux_shmid64.shm_perm.mode;
  405         } else {
  406                 error = copyin(uaddr, linux_shmid, sizeof(*linux_shmid));
  407         }
  408         return (error);
  409 }
  410 
  411 static int
  412 linux_shmid_pushdown(l_int ver, struct l_shmid_ds *linux_shmid, caddr_t uaddr)
  413 {
  414         struct l_shmid64_ds linux_shmid64;
  415 
  416         if (ver == LINUX_IPC_64) {
  417                 bzero(&linux_shmid64, sizeof(linux_shmid64));
  418 
  419                 linux_ipc_perm_to_ipc64_perm(&linux_shmid->shm_perm,
  420                     &linux_shmid64.shm_perm);
  421 
  422                 linux_shmid64.shm_segsz = linux_shmid->shm_segsz;
  423                 linux_shmid64.shm_atime = linux_shmid->shm_atime;
  424                 linux_shmid64.shm_dtime = linux_shmid->shm_dtime;
  425                 linux_shmid64.shm_ctime = linux_shmid->shm_ctime;
  426                 linux_shmid64.shm_cpid = linux_shmid->shm_cpid;
  427                 linux_shmid64.shm_lpid = linux_shmid->shm_lpid;
  428                 linux_shmid64.shm_nattch = linux_shmid->shm_nattch;
  429 
  430                 return (copyout(&linux_shmid64, uaddr, sizeof(linux_shmid64)));
  431         } else {
  432                 return (copyout(linux_shmid, uaddr, sizeof(*linux_shmid)));
  433         }
  434 }
  435 
  436 static int
  437 linux_shminfo_pushdown(l_int ver, struct l_shminfo *linux_shminfo,
  438     caddr_t uaddr)
  439 {
  440         struct l_shminfo64 linux_shminfo64;
  441 
  442         if (ver == LINUX_IPC_64) {
  443                 bzero(&linux_shminfo64, sizeof(linux_shminfo64));
  444 
  445                 linux_shminfo64.shmmax = linux_shminfo->shmmax;
  446                 linux_shminfo64.shmmin = linux_shminfo->shmmin;
  447                 linux_shminfo64.shmmni = linux_shminfo->shmmni;
  448                 linux_shminfo64.shmseg = linux_shminfo->shmseg;
  449                 linux_shminfo64.shmall = linux_shminfo->shmall;
  450 
  451                 return (copyout(&linux_shminfo64, uaddr,
  452                     sizeof(linux_shminfo64)));
  453         } else {
  454                 return (copyout(linux_shminfo, uaddr, sizeof(*linux_shminfo)));
  455         }
  456 }
  457 
  458 int
  459 linux_semop(struct thread *td, struct linux_semop_args *args)
  460 {
  461         struct semop_args /* {
  462         int     semid;
  463         struct  sembuf *sops;
  464         int             nsops;
  465         } */ bsd_args;
  466 
  467         bsd_args.semid = args->semid;
  468         bsd_args.sops = (struct sembuf *)PTRIN(args->tsops);
  469         bsd_args.nsops = args->nsops;
  470         return semop(td, &bsd_args);
  471 }
  472 
  473 int
  474 linux_semget(struct thread *td, struct linux_semget_args *args)
  475 {
  476         struct semget_args /* {
  477         key_t   key;
  478         int             nsems;
  479         int             semflg;
  480         } */ bsd_args;
  481 
  482         if (args->nsems < 0)
  483                 return (EINVAL);
  484         bsd_args.key = args->key;
  485         bsd_args.nsems = args->nsems;
  486         bsd_args.semflg = args->semflg;
  487         return semget(td, &bsd_args);
  488 }
  489 
  490 int
  491 linux_semctl(struct thread *td, struct linux_semctl_args *args)
  492 {
  493         struct l_semid_ds linux_semid;
  494         struct __semctl_args /* {
  495                 int             semid;
  496                 int             semnum;
  497                 int             cmd;
  498                 union semun     *arg;
  499         } */ bsd_args;
  500         struct l_seminfo linux_seminfo;
  501         int error;
  502         union semun *unptr;
  503         caddr_t sg;
  504 
  505         sg = stackgap_init();
  506 
  507         /* Make sure the arg parameter can be copied in. */
  508         unptr = stackgap_alloc(&sg, sizeof(union semun));
  509         bcopy(&args->arg, unptr, sizeof(union semun));
  510 
  511         bsd_args.semid = args->semid;
  512         bsd_args.semnum = args->semnum;
  513         bsd_args.arg = unptr;
  514 
  515         switch (args->cmd & ~LINUX_IPC_64) {
  516         case LINUX_IPC_RMID:
  517                 bsd_args.cmd = IPC_RMID;
  518                 break;
  519         case LINUX_GETNCNT:
  520                 bsd_args.cmd = GETNCNT;
  521                 break;
  522         case LINUX_GETPID:
  523                 bsd_args.cmd = GETPID;
  524                 break;
  525         case LINUX_GETVAL:
  526                 bsd_args.cmd = GETVAL;
  527                 break;
  528         case LINUX_GETZCNT:
  529                 bsd_args.cmd = GETZCNT;
  530                 break;
  531         case LINUX_SETVAL:
  532                 bsd_args.cmd = SETVAL;
  533                 break;
  534         case LINUX_IPC_SET:
  535                 bsd_args.cmd = IPC_SET;
  536                 error = linux_semid_pullup(args->cmd & LINUX_IPC_64,
  537                     &linux_semid, (caddr_t)PTRIN(args->arg.buf));
  538                 if (error)
  539                         return (error);
  540                 unptr->buf = stackgap_alloc(&sg, sizeof(struct semid_ds));
  541                 linux_to_bsd_semid_ds(&linux_semid, unptr->buf);
  542                 return __semctl(td, &bsd_args);
  543         case LINUX_IPC_STAT:
  544         case LINUX_SEM_STAT:
  545                 if((args->cmd & ~LINUX_IPC_64) == LINUX_IPC_STAT)
  546                         bsd_args.cmd = IPC_STAT;
  547                 else
  548                         bsd_args.cmd = SEM_STAT;
  549                 unptr->buf = stackgap_alloc(&sg, sizeof(struct semid_ds));
  550                 error = __semctl(td, &bsd_args);
  551                 if (error)
  552                         return error;
  553                 td->td_retval[0] = (bsd_args.cmd == SEM_STAT) ?
  554                     IXSEQ_TO_IPCID(bsd_args.semid, unptr->buf->sem_perm) :
  555                     0;
  556                 bsd_to_linux_semid_ds(unptr->buf, &linux_semid);
  557                 return (linux_semid_pushdown(args->cmd & LINUX_IPC_64,
  558                     &linux_semid, (caddr_t)PTRIN(args->arg.buf)));
  559         case LINUX_IPC_INFO:
  560         case LINUX_SEM_INFO:
  561                 bcopy(&seminfo, &linux_seminfo, sizeof(linux_seminfo) );
  562 /* XXX BSD equivalent?
  563 #define used_semids 10
  564 #define used_sems 10
  565                 linux_seminfo.semusz = used_semids;
  566                 linux_seminfo.semaem = used_sems;
  567 */
  568                 error = copyout(&linux_seminfo,
  569                     PTRIN(args->arg.buf), sizeof(linux_seminfo));
  570                 if (error)
  571                         return error;
  572                 td->td_retval[0] = seminfo.semmni;
  573                 return 0;                       /* No need for __semctl call */
  574         case LINUX_GETALL:
  575                 /* FALLTHROUGH */
  576         case LINUX_SETALL:
  577                 /* FALLTHROUGH */
  578         default:
  579                 linux_msg(td, "ipc type %d is not implemented",
  580                   args->cmd & ~LINUX_IPC_64);
  581                 return EINVAL;
  582         }
  583         return __semctl(td, &bsd_args);
  584 }
  585 
  586 int
  587 linux_msgsnd(struct thread *td, struct linux_msgsnd_args *args)
  588 {
  589     struct msgsnd_args /* {
  590         int     msqid;
  591         void    *msgp;
  592         size_t  msgsz;
  593         int     msgflg;
  594     } */ bsd_args;
  595 
  596     bsd_args.msqid = args->msqid;
  597     bsd_args.msgp = PTRIN(args->msgp);
  598     bsd_args.msgsz = args->msgsz;
  599     bsd_args.msgflg = args->msgflg;
  600     return msgsnd(td, &bsd_args);
  601 }
  602 
  603 int
  604 linux_msgrcv(struct thread *td, struct linux_msgrcv_args *args)
  605 {
  606     struct msgrcv_args /* {
  607         int     msqid;
  608         void    *msgp;
  609         size_t  msgsz;
  610         long    msgtyp;
  611         int     msgflg;
  612     } */ bsd_args;
  613 
  614     bsd_args.msqid = args->msqid;
  615     bsd_args.msgp = PTRIN(args->msgp);
  616     bsd_args.msgsz = args->msgsz;
  617     bsd_args.msgtyp = args->msgtyp;
  618     bsd_args.msgflg = args->msgflg;
  619     return msgrcv(td, &bsd_args);
  620 }
  621 
  622 int
  623 linux_msgget(struct thread *td, struct linux_msgget_args *args)
  624 {
  625     struct msgget_args /* {
  626         key_t   key;
  627         int     msgflg;
  628     } */ bsd_args;
  629 
  630     bsd_args.key = args->key;
  631     bsd_args.msgflg = args->msgflg;
  632     return msgget(td, &bsd_args);
  633 }
  634 
  635 int
  636 linux_msgctl(struct thread *td, struct linux_msgctl_args *args)
  637 {
  638     int error, bsd_cmd;
  639     struct l_msqid_ds linux_msqid;
  640     struct msqid_ds bsd_msqid;
  641 
  642     error = linux_msqid_pullup(args->cmd & LINUX_IPC_64,
  643       &linux_msqid, (caddr_t)PTRIN(args->buf));
  644     if (error != 0)
  645         return (error);
  646     bsd_cmd = args->cmd & ~LINUX_IPC_64;
  647     if (bsd_cmd == LINUX_IPC_SET)
  648         linux_to_bsd_msqid_ds(&linux_msqid, &bsd_msqid);
  649 
  650     error = kern_msgctl(td, args->msqid, bsd_cmd, &bsd_msqid);
  651     if (error != 0)
  652         if (bsd_cmd != LINUX_IPC_RMID || error != EINVAL)
  653             return (error);
  654 
  655     if (bsd_cmd == LINUX_IPC_STAT) {
  656         bsd_to_linux_msqid_ds(&bsd_msqid, &linux_msqid);
  657         return (linux_msqid_pushdown(args->cmd & LINUX_IPC_64,
  658           &linux_msqid, (caddr_t)PTRIN(args->buf)));
  659     }
  660 
  661     return (0);
  662 }
  663 
  664 int
  665 linux_shmat(struct thread *td, struct linux_shmat_args *args)
  666 {
  667     struct shmat_args /* {
  668         int shmid;
  669         void *shmaddr;
  670         int shmflg;
  671     } */ bsd_args;
  672     int error;
  673 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
  674     l_uintptr_t addr;
  675 #endif
  676 
  677     bsd_args.shmid = args->shmid;
  678     bsd_args.shmaddr = PTRIN(args->shmaddr);
  679     bsd_args.shmflg = args->shmflg;
  680     if ((error = shmat(td, &bsd_args)))
  681         return error;
  682 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
  683     addr = td->td_retval[0];
  684     if ((error = copyout(&addr, PTRIN(args->raddr), sizeof(addr))))
  685         return error;
  686     td->td_retval[0] = 0;
  687 #endif
  688     return 0;
  689 }
  690 
  691 int
  692 linux_shmdt(struct thread *td, struct linux_shmdt_args *args)
  693 {
  694     struct shmdt_args /* {
  695         void *shmaddr;
  696     } */ bsd_args;
  697 
  698     bsd_args.shmaddr = PTRIN(args->shmaddr);
  699     return shmdt(td, &bsd_args);
  700 }
  701 
  702 int
  703 linux_shmget(struct thread *td, struct linux_shmget_args *args)
  704 {
  705     struct shmget_args /* {
  706         key_t key;
  707         int size;
  708         int shmflg;
  709     } */ bsd_args;
  710 
  711     bsd_args.key = args->key;
  712     bsd_args.size = args->size;
  713     bsd_args.shmflg = args->shmflg;
  714     return shmget(td, &bsd_args);
  715 }
  716 
  717 int
  718 linux_shmctl(struct thread *td, struct linux_shmctl_args *args)
  719 {
  720     struct l_shmid_ds linux_shmid;
  721         struct l_shminfo linux_shminfo;
  722         struct l_shm_info linux_shm_info;
  723         struct shmid_ds bsd_shmid;
  724         size_t bufsz;
  725     int error;
  726 
  727     switch (args->cmd & ~LINUX_IPC_64) {
  728 
  729         case LINUX_IPC_INFO: {
  730             struct shminfo bsd_shminfo;
  731 
  732             /* Perform shmctl wanting removed segments lookup */
  733             error = kern_shmctl(td, args->shmid, IPC_INFO,
  734                 (void *)&bsd_shminfo, &bufsz);
  735             if (error)
  736                 return error;
  737         
  738             bsd_to_linux_shminfo(&bsd_shminfo, &linux_shminfo);
  739 
  740             return (linux_shminfo_pushdown(args->cmd & LINUX_IPC_64,
  741                &linux_shminfo, (caddr_t)PTRIN(args->buf)));
  742         }
  743 
  744         case LINUX_SHM_INFO: {
  745             struct shm_info bsd_shm_info;
  746 
  747             /* Perform shmctl wanting removed segments lookup */
  748             error = kern_shmctl(td, args->shmid, SHM_INFO,
  749                 (void *)&bsd_shm_info, &bufsz);
  750             if (error)
  751                 return error;
  752 
  753             bsd_to_linux_shm_info(&bsd_shm_info, &linux_shm_info);
  754 
  755             return copyout(&linux_shm_info, (caddr_t)PTRIN(args->buf),
  756                 sizeof(struct l_shm_info));
  757         }
  758 
  759         case LINUX_IPC_STAT:
  760             /* Perform shmctl wanting removed segments lookup */
  761             error = kern_shmctl(td, args->shmid, IPC_STAT,
  762                 (void *)&bsd_shmid, &bufsz);
  763             if (error)
  764                 return error;
  765                 
  766             bsd_to_linux_shmid_ds(&bsd_shmid, &linux_shmid);
  767 
  768             return (linux_shmid_pushdown(args->cmd & LINUX_IPC_64,
  769           &linux_shmid, (caddr_t)PTRIN(args->buf)));
  770 
  771     case LINUX_SHM_STAT:
  772         /* Perform shmctl wanting removed segments lookup */
  773         error = kern_shmctl(td, args->shmid, IPC_STAT,
  774             (void *)&bsd_shmid, &bufsz);
  775         if (error)
  776                 return error;
  777                 
  778         bsd_to_linux_shmid_ds(&bsd_shmid, &linux_shmid);
  779         
  780         return (linux_shmid_pushdown(args->cmd & LINUX_IPC_64,
  781            &linux_shmid, (caddr_t)PTRIN(args->buf)));
  782 
  783     case LINUX_IPC_SET:
  784         error = linux_shmid_pullup(args->cmd & LINUX_IPC_64,
  785           &linux_shmid, (caddr_t)PTRIN(args->buf));
  786         if (error)
  787                 return error;
  788 
  789         linux_to_bsd_shmid_ds(&linux_shmid, &bsd_shmid);
  790 
  791         /* Perform shmctl wanting removed segments lookup */
  792         return kern_shmctl(td, args->shmid, IPC_SET,
  793             (void *)&bsd_shmid, &bufsz);
  794 
  795     case LINUX_IPC_RMID: {
  796         void *buf;
  797                 
  798         if (args->buf == 0)
  799                 buf = NULL;
  800         else {
  801                 error = linux_shmid_pullup(args->cmd & LINUX_IPC_64,
  802                     &linux_shmid, (caddr_t)PTRIN(args->buf));
  803                 if (error)
  804                         return error;
  805                 linux_to_bsd_shmid_ds(&linux_shmid, &bsd_shmid);
  806                 buf = (void *)&bsd_shmid;
  807         }
  808         return kern_shmctl(td, args->shmid, IPC_RMID, buf, &bufsz);
  809     }
  810 
  811     case LINUX_SHM_LOCK:
  812     case LINUX_SHM_UNLOCK:
  813     default:
  814         linux_msg(td, "ipc typ=%d not implemented", args->cmd & ~LINUX_IPC_64);
  815         return EINVAL;
  816     }
  817 }

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