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/sys_generic.c

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    1 /*      $NetBSD: sys_generic.c,v 1.120.6.1 2009/06/17 20:49:00 bouyer Exp $     */
    2 
    3 /*-
    4  * Copyright (c) 2007, 2008, 2009 The NetBSD Foundation, Inc.
    5  * All rights reserved.
    6  *
    7  * This code is derived from software contributed to The NetBSD Foundation
    8  * by Andrew Doran.
    9  *
   10  * Redistribution and use in source and binary forms, with or without
   11  * modification, are permitted provided that the following conditions
   12  * are met:
   13  * 1. Redistributions of source code must retain the above copyright
   14  *    notice, this list of conditions and the following disclaimer.
   15  * 2. Redistributions in binary form must reproduce the above copyright
   16  *    notice, this list of conditions and the following disclaimer in the
   17  *    documentation and/or other materials provided with the distribution.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   29  * POSSIBILITY OF SUCH DAMAGE.
   30  */
   31 
   32 /*
   33  * Copyright (c) 1982, 1986, 1989, 1993
   34  *      The Regents of the University of California.  All rights reserved.
   35  * (c) UNIX System Laboratories, Inc.
   36  * All or some portions of this file are derived from material licensed
   37  * to the University of California by American Telephone and Telegraph
   38  * Co. or Unix System Laboratories, Inc. and are reproduced herein with
   39  * the permission of UNIX System Laboratories, Inc.
   40  *
   41  * Redistribution and use in source and binary forms, with or without
   42  * modification, are permitted provided that the following conditions
   43  * are met:
   44  * 1. Redistributions of source code must retain the above copyright
   45  *    notice, this list of conditions and the following disclaimer.
   46  * 2. Redistributions in binary form must reproduce the above copyright
   47  *    notice, this list of conditions and the following disclaimer in the
   48  *    documentation and/or other materials provided with the distribution.
   49  * 3. Neither the name of the University nor the names of its contributors
   50  *    may be used to endorse or promote products derived from this software
   51  *    without specific prior written permission.
   52  *
   53  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   54  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   55  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   56  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   57  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   58  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   59  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   60  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   61  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   62  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   63  * SUCH DAMAGE.
   64  *
   65  *      @(#)sys_generic.c       8.9 (Berkeley) 2/14/95
   66  */
   67 
   68 /*
   69  * System calls relating to files.
   70  */
   71 
   72 #include <sys/cdefs.h>
   73 __KERNEL_RCSID(0, "$NetBSD: sys_generic.c,v 1.120.6.1 2009/06/17 20:49:00 bouyer Exp $");
   74 
   75 #include <sys/param.h>
   76 #include <sys/systm.h>
   77 #include <sys/filedesc.h>
   78 #include <sys/ioctl.h>
   79 #include <sys/file.h>
   80 #include <sys/proc.h>
   81 #include <sys/socketvar.h>
   82 #include <sys/signalvar.h>
   83 #include <sys/uio.h>
   84 #include <sys/kernel.h>
   85 #include <sys/stat.h>
   86 #include <sys/kmem.h>
   87 #include <sys/poll.h>
   88 #include <sys/vnode.h>
   89 #include <sys/mount.h>
   90 #include <sys/syscallargs.h>
   91 #include <sys/ktrace.h>
   92 #include <sys/atomic.h>
   93 
   94 #include <uvm/uvm_extern.h>
   95 
   96 /*
   97  * Read system call.
   98  */
   99 /* ARGSUSED */
  100 int
  101 sys_read(struct lwp *l, const struct sys_read_args *uap, register_t *retval)
  102 {
  103         /* {
  104                 syscallarg(int)         fd;
  105                 syscallarg(void *)      buf;
  106                 syscallarg(size_t)      nbyte;
  107         } */
  108         file_t *fp;
  109         int fd;
  110 
  111         fd = SCARG(uap, fd);
  112 
  113         if ((fp = fd_getfile(fd)) == NULL)
  114                 return (EBADF);
  115 
  116         if ((fp->f_flag & FREAD) == 0) {
  117                 fd_putfile(fd);
  118                 return (EBADF);
  119         }
  120 
  121         /* dofileread() will unuse the descriptor for us */
  122         return (dofileread(fd, fp, SCARG(uap, buf), SCARG(uap, nbyte),
  123             &fp->f_offset, FOF_UPDATE_OFFSET, retval));
  124 }
  125 
  126 int
  127 dofileread(int fd, struct file *fp, void *buf, size_t nbyte,
  128         off_t *offset, int flags, register_t *retval)
  129 {
  130         struct iovec aiov;
  131         struct uio auio;
  132         size_t cnt;
  133         int error;
  134         lwp_t *l;
  135 
  136         l = curlwp;
  137 
  138         aiov.iov_base = (void *)buf;
  139         aiov.iov_len = nbyte;
  140         auio.uio_iov = &aiov;
  141         auio.uio_iovcnt = 1;
  142         auio.uio_resid = nbyte;
  143         auio.uio_rw = UIO_READ;
  144         auio.uio_vmspace = l->l_proc->p_vmspace;
  145 
  146         /*
  147          * Reads return ssize_t because -1 is returned on error.  Therefore
  148          * we must restrict the length to SSIZE_MAX to avoid garbage return
  149          * values.
  150          */
  151         if (auio.uio_resid > SSIZE_MAX) {
  152                 error = EINVAL;
  153                 goto out;
  154         }
  155 
  156         cnt = auio.uio_resid;
  157         error = (*fp->f_ops->fo_read)(fp, offset, &auio, fp->f_cred, flags);
  158         if (error)
  159                 if (auio.uio_resid != cnt && (error == ERESTART ||
  160                     error == EINTR || error == EWOULDBLOCK))
  161                         error = 0;
  162         cnt -= auio.uio_resid;
  163         ktrgenio(fd, UIO_READ, buf, cnt, error);
  164         *retval = cnt;
  165  out:
  166         fd_putfile(fd);
  167         return (error);
  168 }
  169 
  170 /*
  171  * Scatter read system call.
  172  */
  173 int
  174 sys_readv(struct lwp *l, const struct sys_readv_args *uap, register_t *retval)
  175 {
  176         /* {
  177                 syscallarg(int)                         fd;
  178                 syscallarg(const struct iovec *)        iovp;
  179                 syscallarg(int)                         iovcnt;
  180         } */
  181 
  182         return do_filereadv(SCARG(uap, fd), SCARG(uap, iovp),
  183             SCARG(uap, iovcnt), NULL, FOF_UPDATE_OFFSET, retval);
  184 }
  185 
  186 int
  187 do_filereadv(int fd, const struct iovec *iovp, int iovcnt,
  188     off_t *offset, int flags, register_t *retval)
  189 {
  190         struct uio      auio;
  191         struct iovec    *iov, *needfree = NULL, aiov[UIO_SMALLIOV];
  192         int             i, error;
  193         size_t          cnt;
  194         u_int           iovlen;
  195         struct file     *fp;
  196         struct iovec    *ktriov = NULL;
  197 
  198         if (iovcnt == 0)
  199                 return EINVAL;
  200 
  201         if ((fp = fd_getfile(fd)) == NULL)
  202                 return EBADF;
  203 
  204         if ((fp->f_flag & FREAD) == 0) {
  205                 fd_putfile(fd);
  206                 return EBADF;
  207         }
  208 
  209         if (offset == NULL)
  210                 offset = &fp->f_offset;
  211         else {
  212                 struct vnode *vp = fp->f_data;
  213                 if (fp->f_type != DTYPE_VNODE || vp->v_type == VFIFO) {
  214                         error = ESPIPE;
  215                         goto out;
  216                 }
  217                 /*
  218                  * Test that the device is seekable ?
  219                  * XXX This works because no file systems actually
  220                  * XXX take any action on the seek operation.
  221                  */
  222                 error = VOP_SEEK(vp, fp->f_offset, *offset, fp->f_cred);
  223                 if (error != 0)
  224                         goto out;
  225         }
  226 
  227         iovlen = iovcnt * sizeof(struct iovec);
  228         if (flags & FOF_IOV_SYSSPACE)
  229                 iov = __UNCONST(iovp);
  230         else {
  231                 iov = aiov;
  232                 if ((u_int)iovcnt > UIO_SMALLIOV) {
  233                         if ((u_int)iovcnt > IOV_MAX) {
  234                                 error = EINVAL;
  235                                 goto out;
  236                         }
  237                         iov = kmem_alloc(iovlen, KM_SLEEP);
  238                         if (iov == NULL) {
  239                                 error = ENOMEM;
  240                                 goto out;
  241                         }
  242                         needfree = iov;
  243                 }
  244                 error = copyin(iovp, iov, iovlen);
  245                 if (error)
  246                         goto done;
  247         }
  248 
  249         auio.uio_iov = iov;
  250         auio.uio_iovcnt = iovcnt;
  251         auio.uio_rw = UIO_READ;
  252         auio.uio_vmspace = curproc->p_vmspace;
  253 
  254         auio.uio_resid = 0;
  255         for (i = 0; i < iovcnt; i++, iov++) {
  256                 auio.uio_resid += iov->iov_len;
  257                 /*
  258                  * Reads return ssize_t because -1 is returned on error.
  259                  * Therefore we must restrict the length to SSIZE_MAX to
  260                  * avoid garbage return values.
  261                  */
  262                 if (iov->iov_len > SSIZE_MAX || auio.uio_resid > SSIZE_MAX) {
  263                         error = EINVAL;
  264                         goto done;
  265                 }
  266         }
  267 
  268         /*
  269          * if tracing, save a copy of iovec
  270          */
  271         if (ktrpoint(KTR_GENIO))  {
  272                 ktriov = kmem_alloc(iovlen, KM_SLEEP);
  273                 if (ktriov != NULL)
  274                         memcpy(ktriov, auio.uio_iov, iovlen);
  275         }
  276 
  277         cnt = auio.uio_resid;
  278         error = (*fp->f_ops->fo_read)(fp, offset, &auio, fp->f_cred, flags);
  279         if (error)
  280                 if (auio.uio_resid != cnt && (error == ERESTART ||
  281                     error == EINTR || error == EWOULDBLOCK))
  282                         error = 0;
  283         cnt -= auio.uio_resid;
  284         *retval = cnt;
  285 
  286         if (ktriov != NULL) {
  287                 ktrgeniov(fd, UIO_READ, ktriov, cnt, error);
  288                 kmem_free(ktriov, iovlen);
  289         }
  290 
  291  done:
  292         if (needfree)
  293                 kmem_free(needfree, iovlen);
  294  out:
  295         fd_putfile(fd);
  296         return (error);
  297 }
  298 
  299 /*
  300  * Write system call
  301  */
  302 int
  303 sys_write(struct lwp *l, const struct sys_write_args *uap, register_t *retval)
  304 {
  305         /* {
  306                 syscallarg(int)                 fd;
  307                 syscallarg(const void *)        buf;
  308                 syscallarg(size_t)              nbyte;
  309         } */
  310         file_t *fp;
  311         int fd;
  312 
  313         fd = SCARG(uap, fd);
  314 
  315         if ((fp = fd_getfile(fd)) == NULL)
  316                 return (EBADF);
  317 
  318         if ((fp->f_flag & FWRITE) == 0) {
  319                 fd_putfile(fd);
  320                 return (EBADF);
  321         }
  322 
  323         /* dofilewrite() will unuse the descriptor for us */
  324         return (dofilewrite(fd, fp, SCARG(uap, buf), SCARG(uap, nbyte),
  325             &fp->f_offset, FOF_UPDATE_OFFSET, retval));
  326 }
  327 
  328 int
  329 dofilewrite(int fd, struct file *fp, const void *buf,
  330         size_t nbyte, off_t *offset, int flags, register_t *retval)
  331 {
  332         struct iovec aiov;
  333         struct uio auio;
  334         size_t cnt;
  335         int error;
  336 
  337         aiov.iov_base = __UNCONST(buf);         /* XXXUNCONST kills const */
  338         aiov.iov_len = nbyte;
  339         auio.uio_iov = &aiov;
  340         auio.uio_iovcnt = 1;
  341         auio.uio_resid = nbyte;
  342         auio.uio_rw = UIO_WRITE;
  343         auio.uio_vmspace = curproc->p_vmspace;
  344 
  345         /*
  346          * Writes return ssize_t because -1 is returned on error.  Therefore
  347          * we must restrict the length to SSIZE_MAX to avoid garbage return
  348          * values.
  349          */
  350         if (auio.uio_resid > SSIZE_MAX) {
  351                 error = EINVAL;
  352                 goto out;
  353         }
  354 
  355         cnt = auio.uio_resid;
  356         error = (*fp->f_ops->fo_write)(fp, offset, &auio, fp->f_cred, flags);
  357         if (error) {
  358                 if (auio.uio_resid != cnt && (error == ERESTART ||
  359                     error == EINTR || error == EWOULDBLOCK))
  360                         error = 0;
  361                 if (error == EPIPE) {
  362                         mutex_enter(proc_lock);
  363                         psignal(curproc, SIGPIPE);
  364                         mutex_exit(proc_lock);
  365                 }
  366         }
  367         cnt -= auio.uio_resid;
  368         ktrgenio(fd, UIO_WRITE, buf, cnt, error);
  369         *retval = cnt;
  370  out:
  371         fd_putfile(fd);
  372         return (error);
  373 }
  374 
  375 /*
  376  * Gather write system call
  377  */
  378 int
  379 sys_writev(struct lwp *l, const struct sys_writev_args *uap, register_t *retval)
  380 {
  381         /* {
  382                 syscallarg(int)                         fd;
  383                 syscallarg(const struct iovec *)        iovp;
  384                 syscallarg(int)                         iovcnt;
  385         } */
  386 
  387         return do_filewritev(SCARG(uap, fd), SCARG(uap, iovp),
  388             SCARG(uap, iovcnt), NULL, FOF_UPDATE_OFFSET, retval);
  389 }
  390 
  391 int
  392 do_filewritev(int fd, const struct iovec *iovp, int iovcnt,
  393     off_t *offset, int flags, register_t *retval)
  394 {
  395         struct uio      auio;
  396         struct iovec    *iov, *needfree = NULL, aiov[UIO_SMALLIOV];
  397         int             i, error;
  398         size_t          cnt;
  399         u_int           iovlen;
  400         struct file     *fp;
  401         struct iovec    *ktriov = NULL;
  402 
  403         if (iovcnt == 0)
  404                 return EINVAL;
  405 
  406         if ((fp = fd_getfile(fd)) == NULL)
  407                 return EBADF;
  408 
  409         if ((fp->f_flag & FWRITE) == 0) {
  410                 fd_putfile(fd);
  411                 return EBADF;
  412         }
  413 
  414         if (offset == NULL)
  415                 offset = &fp->f_offset;
  416         else {
  417                 struct vnode *vp = fp->f_data;
  418                 if (fp->f_type != DTYPE_VNODE || vp->v_type == VFIFO) {
  419                         error = ESPIPE;
  420                         goto out;
  421                 }
  422                 /*
  423                  * Test that the device is seekable ?
  424                  * XXX This works because no file systems actually
  425                  * XXX take any action on the seek operation.
  426                  */
  427                 error = VOP_SEEK(vp, fp->f_offset, *offset, fp->f_cred);
  428                 if (error != 0)
  429                         goto out;
  430         }
  431 
  432         iovlen = iovcnt * sizeof(struct iovec);
  433         if (flags & FOF_IOV_SYSSPACE)
  434                 iov = __UNCONST(iovp);
  435         else {
  436                 iov = aiov;
  437                 if ((u_int)iovcnt > UIO_SMALLIOV) {
  438                         if ((u_int)iovcnt > IOV_MAX) {
  439                                 error = EINVAL;
  440                                 goto out;
  441                         }
  442                         iov = kmem_alloc(iovlen, KM_SLEEP);
  443                         if (iov == NULL) {
  444                                 error = ENOMEM;
  445                                 goto out;
  446                         }
  447                         needfree = iov;
  448                 }
  449                 error = copyin(iovp, iov, iovlen);
  450                 if (error)
  451                         goto done;
  452         }
  453 
  454         auio.uio_iov = iov;
  455         auio.uio_iovcnt = iovcnt;
  456         auio.uio_rw = UIO_WRITE;
  457         auio.uio_vmspace = curproc->p_vmspace;
  458 
  459         auio.uio_resid = 0;
  460         for (i = 0; i < iovcnt; i++, iov++) {
  461                 auio.uio_resid += iov->iov_len;
  462                 /*
  463                  * Writes return ssize_t because -1 is returned on error.
  464                  * Therefore we must restrict the length to SSIZE_MAX to
  465                  * avoid garbage return values.
  466                  */
  467                 if (iov->iov_len > SSIZE_MAX || auio.uio_resid > SSIZE_MAX) {
  468                         error = EINVAL;
  469                         goto done;
  470                 }
  471         }
  472 
  473         /*
  474          * if tracing, save a copy of iovec
  475          */
  476         if (ktrpoint(KTR_GENIO))  {
  477                 ktriov = kmem_alloc(iovlen, KM_SLEEP);
  478                 if (ktriov != NULL)
  479                         memcpy(ktriov, auio.uio_iov, iovlen);
  480         }
  481 
  482         cnt = auio.uio_resid;
  483         error = (*fp->f_ops->fo_write)(fp, offset, &auio, fp->f_cred, flags);
  484         if (error) {
  485                 if (auio.uio_resid != cnt && (error == ERESTART ||
  486                     error == EINTR || error == EWOULDBLOCK))
  487                         error = 0;
  488                 if (error == EPIPE) {
  489                         mutex_enter(proc_lock);
  490                         psignal(curproc, SIGPIPE);
  491                         mutex_exit(proc_lock);
  492                 }
  493         }
  494         cnt -= auio.uio_resid;
  495         *retval = cnt;
  496 
  497         if (ktriov != NULL) {
  498                 ktrgeniov(fd, UIO_WRITE, ktriov, cnt, error);
  499                 kmem_free(ktriov, iovlen);
  500         }
  501 
  502  done:
  503         if (needfree)
  504                 kmem_free(needfree, iovlen);
  505  out:
  506         fd_putfile(fd);
  507         return (error);
  508 }
  509 
  510 /*
  511  * Ioctl system call
  512  */
  513 /* ARGSUSED */
  514 int
  515 sys_ioctl(struct lwp *l, const struct sys_ioctl_args *uap, register_t *retval)
  516 {
  517         /* {
  518                 syscallarg(int)         fd;
  519                 syscallarg(u_long)      com;
  520                 syscallarg(void *)      data;
  521         } */
  522         struct file     *fp;
  523         proc_t          *p;
  524         struct filedesc *fdp;
  525         u_long          com;
  526         int             error;
  527         u_int           size;
  528         void            *data, *memp;
  529 #define STK_PARAMS      128
  530         u_long          stkbuf[STK_PARAMS/sizeof(u_long)];
  531         fdfile_t        *ff;
  532 
  533         error = 0;
  534         p = l->l_proc;
  535         fdp = p->p_fd;
  536 
  537         if ((fp = fd_getfile(SCARG(uap, fd))) == NULL)
  538                 return (EBADF);
  539 
  540         if ((fp->f_flag & (FREAD | FWRITE)) == 0) {
  541                 error = EBADF;
  542                 com = 0;
  543                 goto out;
  544         }
  545 
  546         ff = fdp->fd_ofiles[SCARG(uap, fd)];
  547         switch (com = SCARG(uap, com)) {
  548         case FIONCLEX:
  549                 ff->ff_exclose = false;
  550                 goto out;
  551 
  552         case FIOCLEX:
  553                 ff->ff_exclose = true;
  554                 fdp->fd_exclose = true;
  555                 goto out;
  556         }
  557 
  558         /*
  559          * Interpret high order word to find amount of data to be
  560          * copied to/from the user's address space.
  561          */
  562         size = IOCPARM_LEN(com);
  563         if (size > IOCPARM_MAX) {
  564                 error = ENOTTY;
  565                 goto out;
  566         }
  567         memp = NULL;
  568         if (size > sizeof(stkbuf)) {
  569                 memp = kmem_alloc(size, KM_SLEEP);
  570                 data = memp;
  571         } else
  572                 data = (void *)stkbuf;
  573         if (com&IOC_IN) {
  574                 if (size) {
  575                         error = copyin(SCARG(uap, data), data, size);
  576                         if (error) {
  577                                 if (memp)
  578                                         kmem_free(memp, size);
  579                                 goto out;
  580                         }
  581                         ktrgenio(SCARG(uap, fd), UIO_WRITE, SCARG(uap, data),
  582                             size, 0);
  583                 } else
  584                         *(void **)data = SCARG(uap, data);
  585         } else if ((com&IOC_OUT) && size)
  586                 /*
  587                  * Zero the buffer so the user always
  588                  * gets back something deterministic.
  589                  */
  590                 memset(data, 0, size);
  591         else if (com&IOC_VOID)
  592                 *(void **)data = SCARG(uap, data);
  593 
  594         switch (com) {
  595 
  596         case FIONBIO:
  597                 /* XXX Code block is not atomic */
  598                 if (*(int *)data != 0)
  599                         atomic_or_uint(&fp->f_flag, FNONBLOCK);
  600                 else
  601                         atomic_and_uint(&fp->f_flag, ~FNONBLOCK);
  602                 error = (*fp->f_ops->fo_ioctl)(fp, FIONBIO, data);
  603                 break;
  604 
  605         case FIOASYNC:
  606                 /* XXX Code block is not atomic */
  607                 if (*(int *)data != 0)
  608                         atomic_or_uint(&fp->f_flag, FASYNC);
  609                 else
  610                         atomic_and_uint(&fp->f_flag, ~FASYNC);
  611                 error = (*fp->f_ops->fo_ioctl)(fp, FIOASYNC, data);
  612                 break;
  613 
  614         default:
  615                 error = (*fp->f_ops->fo_ioctl)(fp, com, data);
  616                 /*
  617                  * Copy any data to user, size was
  618                  * already set and checked above.
  619                  */
  620                 if (error == 0 && (com&IOC_OUT) && size) {
  621                         error = copyout(data, SCARG(uap, data), size);
  622                         ktrgenio(SCARG(uap, fd), UIO_READ, SCARG(uap, data),
  623                             size, error);
  624                 }
  625                 break;
  626         }
  627         if (memp)
  628                 kmem_free(memp, size);
  629  out:
  630         fd_putfile(SCARG(uap, fd));
  631         switch (error) {
  632         case -1:
  633                 printf("sys_ioctl: _IO%s%s('%c', %lu, %lu) returned -1: "
  634                     "pid=%d comm=%s\n",
  635                     (com & IOC_IN) ? "W" : "", (com & IOC_OUT) ? "R" : "",
  636                     (char)IOCGROUP(com), (com & 0xff), IOCPARM_LEN(com),
  637                     p->p_pid, p->p_comm);
  638                 /* FALLTHROUGH */
  639         case EPASSTHROUGH:
  640                 error = ENOTTY;
  641                 /* FALLTHROUGH */
  642         default:
  643                 return (error);
  644         }
  645 }

Cache object: 62470010c460eb81d5d8bec1fe48deb1


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