linux_file.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/9.0/sys/compat/linux/linux_file.c 225617 2011-09-16 13:58:51Z kmacy $");
   31 
   32 #include "opt_compat.h"
   33 
   34 #include <sys/param.h>
   35 #include <sys/systm.h>
   36 #include <sys/capability.h>
   37 #include <sys/conf.h>
   38 #include <sys/dirent.h>
   39 #include <sys/fcntl.h>
   40 #include <sys/file.h>
   41 #include <sys/filedesc.h>
   42 #include <sys/lock.h>
   43 #include <sys/malloc.h>
   44 #include <sys/mount.h>
   45 #include <sys/mutex.h>
   46 #include <sys/namei.h>
   47 #include <sys/proc.h>
   48 #include <sys/stat.h>
   49 #include <sys/sx.h>
   50 #include <sys/syscallsubr.h>
   51 #include <sys/sysproto.h>
   52 #include <sys/tty.h>
   53 #include <sys/unistd.h>
   54 #include <sys/vnode.h>
   55 
   56 #include <security/mac/mac_framework.h>
   57 
   58 #include <ufs/ufs/extattr.h>
   59 #include <ufs/ufs/quota.h>
   60 #include <ufs/ufs/ufsmount.h>
   61 
   62 #ifdef COMPAT_LINUX32
   63 #include <machine/../linux32/linux.h>
   64 #include <machine/../linux32/linux32_proto.h>
   65 #else
   66 #include <machine/../linux/linux.h>
   67 #include <machine/../linux/linux_proto.h>
   68 #endif
   69 #include <compat/linux/linux_util.h>
   70 #include <compat/linux/linux_file.h>
   71 
   72 int
   73 linux_creat(struct thread *td, struct linux_creat_args *args)
   74 {
   75     char *path;
   76     int error;
   77 
   78     LCONVPATHEXIST(td, args->path, &path);
   79 
   80 #ifdef DEBUG
   81         if (ldebug(creat))
   82                 printf(ARGS(creat, "%s, %d"), path, args->mode);
   83 #endif
   84     error = kern_open(td, path, UIO_SYSSPACE, O_WRONLY | O_CREAT | O_TRUNC,
   85         args->mode);
   86     LFREEPATH(path);
   87     return (error);
   88 }
   89 
   90 
   91 static int
   92 linux_common_open(struct thread *td, int dirfd, char *path, int l_flags, int mode)
   93 {
   94     struct proc *p = td->td_proc;
   95     struct file *fp;
   96     int fd;
   97     int bsd_flags, error;
   98 
   99     bsd_flags = 0;
  100     switch (l_flags & LINUX_O_ACCMODE) {
  101     case LINUX_O_WRONLY:
  102         bsd_flags |= O_WRONLY;
  103         break;
  104     case LINUX_O_RDWR:
  105         bsd_flags |= O_RDWR;
  106         break;
  107     default:
  108         bsd_flags |= O_RDONLY;
  109     }
  110     if (l_flags & LINUX_O_NDELAY)
  111         bsd_flags |= O_NONBLOCK;
  112     if (l_flags & LINUX_O_APPEND)
  113         bsd_flags |= O_APPEND;
  114     if (l_flags & LINUX_O_SYNC)
  115         bsd_flags |= O_FSYNC;
  116     if (l_flags & LINUX_O_NONBLOCK)
  117         bsd_flags |= O_NONBLOCK;
  118     if (l_flags & LINUX_FASYNC)
  119         bsd_flags |= O_ASYNC;
  120     if (l_flags & LINUX_O_CREAT)
  121         bsd_flags |= O_CREAT;
  122     if (l_flags & LINUX_O_TRUNC)
  123         bsd_flags |= O_TRUNC;
  124     if (l_flags & LINUX_O_EXCL)
  125         bsd_flags |= O_EXCL;
  126     if (l_flags & LINUX_O_NOCTTY)
  127         bsd_flags |= O_NOCTTY;
  128     if (l_flags & LINUX_O_DIRECT)
  129         bsd_flags |= O_DIRECT;
  130     if (l_flags & LINUX_O_NOFOLLOW)
  131         bsd_flags |= O_NOFOLLOW;
  132     if (l_flags & LINUX_O_DIRECTORY)
  133         bsd_flags |= O_DIRECTORY;
  134     /* XXX LINUX_O_NOATIME: unable to be easily implemented. */
  135 
  136     error = kern_openat(td, dirfd, path, UIO_SYSSPACE, bsd_flags, mode);
  137 
  138     if (!error) {
  139             fd = td->td_retval[0];
  140             /*
  141              * XXX In between kern_open() and fget(), another process
  142              * having the same filedesc could use that fd without
  143              * checking below.
  144              */
  145             error = fget(td, fd, CAP_IOCTL, &fp);
  146             if (!error) {
  147                     sx_slock(&proctree_lock);
  148                     PROC_LOCK(p);
  149                     if (!(bsd_flags & O_NOCTTY) &&
  150                         SESS_LEADER(p) && !(p->p_flag & P_CONTROLT)) {
  151                             PROC_UNLOCK(p);
  152                             sx_unlock(&proctree_lock);
  153                             if (fp->f_type == DTYPE_VNODE)
  154                                     (void) fo_ioctl(fp, TIOCSCTTY, (caddr_t) 0,
  155                                              td->td_ucred, td);
  156                     } else {
  157                             PROC_UNLOCK(p);
  158                             sx_sunlock(&proctree_lock);
  159                     }
  160                     fdrop(fp, td);
  161                     /*
  162                      * XXX as above, fdrop()/kern_close() pair is racy.
  163                      */
  164                     if (error)
  165                             kern_close(td, fd);
  166             }
  167     }
  168 
  169 #ifdef DEBUG
  170     if (ldebug(open))
  171             printf(LMSG("open returns error %d"), error);
  172 #endif
  173     LFREEPATH(path);
  174     return (error);
  175 }
  176 
  177 int
  178 linux_openat(struct thread *td, struct linux_openat_args *args)
  179 {
  180         char *path;
  181         int dfd;
  182 
  183         dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
  184         if (args->flags & LINUX_O_CREAT)
  185                 LCONVPATH_AT(td, args->filename, &path, 1, dfd);
  186         else
  187                 LCONVPATH_AT(td, args->filename, &path, 0, dfd);
  188 #ifdef DEBUG
  189         if (ldebug(openat))
  190                 printf(ARGS(openat, "%i, %s, 0x%x, 0x%x"), args->dfd,
  191                     path, args->flags, args->mode);
  192 #endif
  193         return (linux_common_open(td, dfd, path, args->flags, args->mode));
  194 }
  195 
  196 int
  197 linux_open(struct thread *td, struct linux_open_args *args)
  198 {
  199     char *path;
  200 
  201     if (args->flags & LINUX_O_CREAT)
  202         LCONVPATHCREAT(td, args->path, &path);
  203     else
  204         LCONVPATHEXIST(td, args->path, &path);
  205 
  206 #ifdef DEBUG
  207         if (ldebug(open))
  208                 printf(ARGS(open, "%s, 0x%x, 0x%x"),
  209                     path, args->flags, args->mode);
  210 #endif
  211 
  212         return (linux_common_open(td, AT_FDCWD, path, args->flags, args->mode));
  213 }
  214 
  215 int
  216 linux_lseek(struct thread *td, struct linux_lseek_args *args)
  217 {
  218 
  219     struct lseek_args /* {
  220         int fd;
  221         int pad;
  222         off_t offset;
  223         int whence;
  224     } */ tmp_args;
  225     int error;
  226 
  227 #ifdef DEBUG
  228         if (ldebug(lseek))
  229                 printf(ARGS(lseek, "%d, %ld, %d"),
  230                     args->fdes, (long)args->off, args->whence);
  231 #endif
  232     tmp_args.fd = args->fdes;
  233     tmp_args.offset = (off_t)args->off;
  234     tmp_args.whence = args->whence;
  235     error = sys_lseek(td, &tmp_args);
  236     return error;
  237 }
  238 
  239 int
  240 linux_llseek(struct thread *td, struct linux_llseek_args *args)
  241 {
  242         struct lseek_args bsd_args;
  243         int error;
  244         off_t off;
  245 
  246 #ifdef DEBUG
  247         if (ldebug(llseek))
  248                 printf(ARGS(llseek, "%d, %d:%d, %d"),
  249                     args->fd, args->ohigh, args->olow, args->whence);
  250 #endif
  251         off = (args->olow) | (((off_t) args->ohigh) << 32);
  252 
  253         bsd_args.fd = args->fd;
  254         bsd_args.offset = off;
  255         bsd_args.whence = args->whence;
  256 
  257         if ((error = sys_lseek(td, &bsd_args)))
  258                 return error;
  259 
  260         if ((error = copyout(td->td_retval, args->res, sizeof (off_t))))
  261                 return error;
  262 
  263         td->td_retval[0] = 0;
  264         return 0;
  265 }
  266 
  267 int
  268 linux_readdir(struct thread *td, struct linux_readdir_args *args)
  269 {
  270         struct linux_getdents_args lda;
  271 
  272         lda.fd = args->fd;
  273         lda.dent = args->dent;
  274         lda.count = 1;
  275         return linux_getdents(td, &lda);
  276 }
  277 
  278 /*
  279  * Note that linux_getdents(2) and linux_getdents64(2) have the same
  280  * arguments. They only differ in the definition of struct dirent they
  281  * operate on. We use this to common the code, with the exception of
  282  * accessing struct dirent. Note that linux_readdir(2) is implemented
  283  * by means of linux_getdents(2). In this case we never operate on
  284  * struct dirent64 and thus don't need to handle it...
  285  */
  286 
  287 struct l_dirent {
  288         l_ulong         d_ino;
  289         l_off_t         d_off;
  290         l_ushort        d_reclen;
  291         char            d_name[LINUX_NAME_MAX + 1];
  292 };
  293 
  294 struct l_dirent64 {
  295         uint64_t        d_ino;
  296         int64_t         d_off;
  297         l_ushort        d_reclen;
  298         u_char          d_type;
  299         char            d_name[LINUX_NAME_MAX + 1];
  300 };
  301 
  302 /*
  303  * Linux uses the last byte in the dirent buffer to store d_type,
  304  * at least glibc-2.7 requires it. That is why l_dirent is padded with 2 bytes.
  305  */
  306 #define LINUX_RECLEN(namlen)                                            \
  307     roundup((offsetof(struct l_dirent, d_name) + (namlen) + 2),         \
  308     sizeof(l_ulong))
  309 
  310 #define LINUX_RECLEN64(namlen)                                          \
  311     roundup((offsetof(struct l_dirent64, d_name) + (namlen) + 1),       \
  312     sizeof(uint64_t))
  313 
  314 #define LINUX_MAXRECLEN         max(LINUX_RECLEN(LINUX_NAME_MAX),       \
  315                                     LINUX_RECLEN64(LINUX_NAME_MAX))
  316 #define LINUX_DIRBLKSIZ         512
  317 
  318 static int
  319 getdents_common(struct thread *td, struct linux_getdents64_args *args,
  320     int is64bit)
  321 {
  322         struct dirent *bdp;
  323         struct vnode *vp;
  324         caddr_t inp, buf;               /* BSD-format */
  325         int len, reclen;                /* BSD-format */
  326         caddr_t outp;                   /* Linux-format */
  327         int resid, linuxreclen=0;       /* Linux-format */
  328         caddr_t lbuf;                   /* Linux-format */
  329         struct file *fp;
  330         struct uio auio;
  331         struct iovec aiov;
  332         off_t off;
  333         struct l_dirent *linux_dirent;
  334         struct l_dirent64 *linux_dirent64;
  335         int buflen, error, eofflag, nbytes, justone;
  336         u_long *cookies = NULL, *cookiep;
  337         int ncookies, vfslocked;
  338 
  339         nbytes = args->count;
  340         if (nbytes == 1) {
  341                 /* readdir(2) case. Always struct dirent. */
  342                 if (is64bit)
  343                         return (EINVAL);
  344                 nbytes = sizeof(*linux_dirent);
  345                 justone = 1;
  346         } else
  347                 justone = 0;
  348 
  349         if ((error = getvnode(td->td_proc->p_fd, args->fd, CAP_READ, &fp)) != 0)
  350                 return (error);
  351 
  352         if ((fp->f_flag & FREAD) == 0) {
  353                 fdrop(fp, td);
  354                 return (EBADF);
  355         }
  356 
  357         vp = fp->f_vnode;
  358         vfslocked = VFS_LOCK_GIANT(vp->v_mount);
  359         if (vp->v_type != VDIR) {
  360                 VFS_UNLOCK_GIANT(vfslocked);
  361                 fdrop(fp, td);
  362                 return (EINVAL);
  363         }
  364 
  365         off = fp->f_offset;
  366 
  367         buflen = max(LINUX_DIRBLKSIZ, nbytes);
  368         buflen = min(buflen, MAXBSIZE);
  369         buf = malloc(buflen, M_TEMP, M_WAITOK);
  370         lbuf = malloc(LINUX_MAXRECLEN, M_TEMP, M_WAITOK | M_ZERO);
  371         vn_lock(vp, LK_SHARED | LK_RETRY);
  372 
  373         aiov.iov_base = buf;
  374         aiov.iov_len = buflen;
  375         auio.uio_iov = &aiov;
  376         auio.uio_iovcnt = 1;
  377         auio.uio_rw = UIO_READ;
  378         auio.uio_segflg = UIO_SYSSPACE;
  379         auio.uio_td = td;
  380         auio.uio_resid = buflen;
  381         auio.uio_offset = off;
  382 
  383         if (cookies) {
  384                 free(cookies, M_TEMP);
  385                 cookies = NULL;
  386         }
  387 
  388 #ifdef MAC
  389         /*
  390          * Do directory search MAC check using non-cached credentials.
  391          */
  392         if ((error = mac_vnode_check_readdir(td->td_ucred, vp)))
  393                 goto out;
  394 #endif /* MAC */
  395         if ((error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, &ncookies,
  396                  &cookies)))
  397                 goto out;
  398 
  399         inp = buf;
  400         outp = (caddr_t)args->dirent;
  401         resid = nbytes;
  402         if ((len = buflen - auio.uio_resid) <= 0)
  403                 goto eof;
  404 
  405         cookiep = cookies;
  406 
  407         if (cookies) {
  408                 /*
  409                  * When using cookies, the vfs has the option of reading from
  410                  * a different offset than that supplied (UFS truncates the
  411                  * offset to a block boundary to make sure that it never reads
  412                  * partway through a directory entry, even if the directory
  413                  * has been compacted).
  414                  */
  415                 while (len > 0 && ncookies > 0 && *cookiep <= off) {
  416                         bdp = (struct dirent *) inp;
  417                         len -= bdp->d_reclen;
  418                         inp += bdp->d_reclen;
  419                         cookiep++;
  420                         ncookies--;
  421                 }
  422         }
  423 
  424         while (len > 0) {
  425                 if (cookiep && ncookies == 0)
  426                         break;
  427                 bdp = (struct dirent *) inp;
  428                 reclen = bdp->d_reclen;
  429                 if (reclen & 3) {
  430                         error = EFAULT;
  431                         goto out;
  432                 }
  433 
  434                 if (bdp->d_fileno == 0) {
  435                         inp += reclen;
  436                         if (cookiep) {
  437                                 off = *cookiep++;
  438                                 ncookies--;
  439                         } else
  440                                 off += reclen;
  441 
  442                         len -= reclen;
  443                         continue;
  444                 }
  445 
  446                 linuxreclen = (is64bit)
  447                     ? LINUX_RECLEN64(bdp->d_namlen)
  448                     : LINUX_RECLEN(bdp->d_namlen);
  449 
  450                 if (reclen > len || resid < linuxreclen) {
  451                         outp++;
  452                         break;
  453                 }
  454 
  455                 if (justone) {
  456                         /* readdir(2) case. */
  457                         linux_dirent = (struct l_dirent*)lbuf;
  458                         linux_dirent->d_ino = bdp->d_fileno;
  459                         linux_dirent->d_off = (l_off_t)linuxreclen;
  460                         linux_dirent->d_reclen = (l_ushort)bdp->d_namlen;
  461                         strlcpy(linux_dirent->d_name, bdp->d_name,
  462                             linuxreclen - offsetof(struct l_dirent, d_name));
  463                         error = copyout(linux_dirent, outp, linuxreclen);
  464                 }
  465                 if (is64bit) {
  466                         linux_dirent64 = (struct l_dirent64*)lbuf;
  467                         linux_dirent64->d_ino = bdp->d_fileno;
  468                         linux_dirent64->d_off = (cookiep)
  469                             ? (l_off_t)*cookiep
  470                             : (l_off_t)(off + reclen);
  471                         linux_dirent64->d_reclen = (l_ushort)linuxreclen;
  472                         linux_dirent64->d_type = bdp->d_type;
  473                         strlcpy(linux_dirent64->d_name, bdp->d_name,
  474                             linuxreclen - offsetof(struct l_dirent64, d_name));
  475                         error = copyout(linux_dirent64, outp, linuxreclen);
  476                 } else if (!justone) {
  477                         linux_dirent = (struct l_dirent*)lbuf;
  478                         linux_dirent->d_ino = bdp->d_fileno;
  479                         linux_dirent->d_off = (cookiep)
  480                             ? (l_off_t)*cookiep
  481                             : (l_off_t)(off + reclen);
  482                         linux_dirent->d_reclen = (l_ushort)linuxreclen;
  483                         /*
  484                          * Copy d_type to last byte of l_dirent buffer
  485                          */
  486                         lbuf[linuxreclen-1] = bdp->d_type;
  487                         strlcpy(linux_dirent->d_name, bdp->d_name,
  488                             linuxreclen - offsetof(struct l_dirent, d_name)-1);
  489                         error = copyout(linux_dirent, outp, linuxreclen);
  490                 }
  491 
  492                 if (error)
  493                         goto out;
  494 
  495                 inp += reclen;
  496                 if (cookiep) {
  497                         off = *cookiep++;
  498                         ncookies--;
  499                 } else
  500                         off += reclen;
  501 
  502                 outp += linuxreclen;
  503                 resid -= linuxreclen;
  504                 len -= reclen;
  505                 if (justone)
  506                         break;
  507         }
  508 
  509         if (outp == (caddr_t)args->dirent) {
  510                 nbytes = resid;
  511                 goto eof;
  512         }
  513 
  514         fp->f_offset = off;
  515         if (justone)
  516                 nbytes = resid + linuxreclen;
  517 
  518 eof:
  519         td->td_retval[0] = nbytes - resid;
  520 
  521 out:
  522         if (cookies)
  523                 free(cookies, M_TEMP);
  524 
  525         VOP_UNLOCK(vp, 0);
  526         VFS_UNLOCK_GIANT(vfslocked);
  527         fdrop(fp, td);
  528         free(buf, M_TEMP);
  529         free(lbuf, M_TEMP);
  530         return (error);
  531 }
  532 
  533 int
  534 linux_getdents(struct thread *td, struct linux_getdents_args *args)
  535 {
  536 
  537 #ifdef DEBUG
  538         if (ldebug(getdents))
  539                 printf(ARGS(getdents, "%d, *, %d"), args->fd, args->count);
  540 #endif
  541 
  542         return (getdents_common(td, (struct linux_getdents64_args*)args, 0));
  543 }
  544 
  545 int
  546 linux_getdents64(struct thread *td, struct linux_getdents64_args *args)
  547 {
  548 
  549 #ifdef DEBUG
  550         if (ldebug(getdents64))
  551                 printf(ARGS(getdents64, "%d, *, %d"), args->fd, args->count);
  552 #endif
  553 
  554         return (getdents_common(td, args, 1));
  555 }
  556 
  557 /*
  558  * These exist mainly for hooks for doing /compat/linux translation.
  559  */
  560 
  561 int
  562 linux_access(struct thread *td, struct linux_access_args *args)
  563 {
  564         char *path;
  565         int error;
  566 
  567         /* linux convention */
  568         if (args->flags & ~(F_OK | X_OK | W_OK | R_OK))
  569                 return (EINVAL);
  570 
  571         LCONVPATHEXIST(td, args->path, &path);
  572 
  573 #ifdef DEBUG
  574         if (ldebug(access))
  575                 printf(ARGS(access, "%s, %d"), path, args->flags);
  576 #endif
  577         error = kern_access(td, path, UIO_SYSSPACE, args->flags);
  578         LFREEPATH(path);
  579 
  580         return (error);
  581 }
  582 
  583 int
  584 linux_faccessat(struct thread *td, struct linux_faccessat_args *args)
  585 {
  586         char *path;
  587         int error, dfd;
  588 
  589         /* linux convention */
  590         if (args->mode & ~(F_OK | X_OK | W_OK | R_OK))
  591                 return (EINVAL);
  592 
  593         dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
  594         LCONVPATHEXIST_AT(td, args->filename, &path, dfd);
  595 
  596 #ifdef DEBUG
  597         if (ldebug(access))
  598                 printf(ARGS(access, "%s, %d"), path, args->mode);
  599 #endif
  600 
  601         error = kern_accessat(td, dfd, path, UIO_SYSSPACE, 0 /* XXX */,
  602             args->mode);
  603         LFREEPATH(path);
  604 
  605         return (error);
  606 }
  607 
  608 int
  609 linux_unlink(struct thread *td, struct linux_unlink_args *args)
  610 {
  611         char *path;
  612         int error;
  613         struct stat st;
  614 
  615         LCONVPATHEXIST(td, args->path, &path);
  616 
  617 #ifdef DEBUG
  618         if (ldebug(unlink))
  619                 printf(ARGS(unlink, "%s"), path);
  620 #endif
  621 
  622         error = kern_unlink(td, path, UIO_SYSSPACE);
  623         if (error == EPERM)
  624                 /* Introduce POSIX noncompliant behaviour of Linux */
  625                 if (kern_stat(td, path, UIO_SYSSPACE, &st) == 0)
  626                         if (S_ISDIR(st.st_mode))
  627                                 error = EISDIR;
  628         LFREEPATH(path);
  629         return (error);
  630 }
  631 
  632 int
  633 linux_unlinkat(struct thread *td, struct linux_unlinkat_args *args)
  634 {
  635         char *path;
  636         int error, dfd;
  637         struct stat st;
  638 
  639         if (args->flag & ~LINUX_AT_REMOVEDIR)
  640                 return (EINVAL);
  641 
  642         dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
  643         LCONVPATHEXIST_AT(td, args->pathname, &path, dfd);
  644 
  645 #ifdef DEBUG
  646         if (ldebug(unlinkat))
  647                 printf(ARGS(unlinkat, "%s"), path);
  648 #endif
  649 
  650         if (args->flag & LINUX_AT_REMOVEDIR)
  651                 error = kern_rmdirat(td, dfd, path, UIO_SYSSPACE);
  652         else
  653                 error = kern_unlinkat(td, dfd, path, UIO_SYSSPACE, 0);
  654         if (error == EPERM && !(args->flag & LINUX_AT_REMOVEDIR)) {
  655                 /* Introduce POSIX noncompliant behaviour of Linux */
  656                 if (kern_statat(td, AT_SYMLINK_NOFOLLOW, dfd, path,
  657                     UIO_SYSSPACE, &st) == 0 && S_ISDIR(st.st_mode))
  658                         error = EISDIR;
  659         }
  660         LFREEPATH(path);
  661         return (error);
  662 }
  663 int
  664 linux_chdir(struct thread *td, struct linux_chdir_args *args)
  665 {
  666         char *path;
  667         int error;
  668 
  669         LCONVPATHEXIST(td, args->path, &path);
  670 
  671 #ifdef DEBUG
  672         if (ldebug(chdir))
  673                 printf(ARGS(chdir, "%s"), path);
  674 #endif
  675         error = kern_chdir(td, path, UIO_SYSSPACE);
  676         LFREEPATH(path);
  677         return (error);
  678 }
  679 
  680 int
  681 linux_chmod(struct thread *td, struct linux_chmod_args *args)
  682 {
  683         char *path;
  684         int error;
  685 
  686         LCONVPATHEXIST(td, args->path, &path);
  687 
  688 #ifdef DEBUG
  689         if (ldebug(chmod))
  690                 printf(ARGS(chmod, "%s, %d"), path, args->mode);
  691 #endif
  692         error = kern_chmod(td, path, UIO_SYSSPACE, args->mode);
  693         LFREEPATH(path);
  694         return (error);
  695 }
  696 
  697 int
  698 linux_fchmodat(struct thread *td, struct linux_fchmodat_args *args)
  699 {
  700         char *path;
  701         int error, dfd;
  702 
  703         dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
  704         LCONVPATHEXIST_AT(td, args->filename, &path, dfd);
  705 
  706 #ifdef DEBUG
  707         if (ldebug(fchmodat))
  708                 printf(ARGS(fchmodat, "%s, %d"), path, args->mode);
  709 #endif
  710 
  711         error = kern_fchmodat(td, dfd, path, UIO_SYSSPACE, args->mode, 0);
  712         LFREEPATH(path);
  713         return (error);
  714 }
  715 
  716 int
  717 linux_mkdir(struct thread *td, struct linux_mkdir_args *args)
  718 {
  719         char *path;
  720         int error;
  721 
  722         LCONVPATHCREAT(td, args->path, &path);
  723 
  724 #ifdef DEBUG
  725         if (ldebug(mkdir))
  726                 printf(ARGS(mkdir, "%s, %d"), path, args->mode);
  727 #endif
  728         error = kern_mkdir(td, path, UIO_SYSSPACE, args->mode);
  729         LFREEPATH(path);
  730         return (error);
  731 }
  732 
  733 int
  734 linux_mkdirat(struct thread *td, struct linux_mkdirat_args *args)
  735 {
  736         char *path;
  737         int error, dfd;
  738 
  739         dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
  740         LCONVPATHCREAT_AT(td, args->pathname, &path, dfd);
  741 
  742 #ifdef DEBUG
  743         if (ldebug(mkdirat))
  744                 printf(ARGS(mkdirat, "%s, %d"), path, args->mode);
  745 #endif
  746         error = kern_mkdirat(td, dfd, path, UIO_SYSSPACE, args->mode);
  747         LFREEPATH(path);
  748         return (error);
  749 }
  750 
  751 int
  752 linux_rmdir(struct thread *td, struct linux_rmdir_args *args)
  753 {
  754         char *path;
  755         int error;
  756 
  757         LCONVPATHEXIST(td, args->path, &path);
  758 
  759 #ifdef DEBUG
  760         if (ldebug(rmdir))
  761                 printf(ARGS(rmdir, "%s"), path);
  762 #endif
  763         error = kern_rmdir(td, path, UIO_SYSSPACE);
  764         LFREEPATH(path);
  765         return (error);
  766 }
  767 
  768 int
  769 linux_rename(struct thread *td, struct linux_rename_args *args)
  770 {
  771         char *from, *to;
  772         int error;
  773 
  774         LCONVPATHEXIST(td, args->from, &from);
  775         /* Expand LCONVPATHCREATE so that `from' can be freed on errors */
  776         error = linux_emul_convpath(td, args->to, UIO_USERSPACE, &to, 1, AT_FDCWD);
  777         if (to == NULL) {
  778                 LFREEPATH(from);
  779                 return (error);
  780         }
  781 
  782 #ifdef DEBUG
  783         if (ldebug(rename))
  784                 printf(ARGS(rename, "%s, %s"), from, to);
  785 #endif
  786         error = kern_rename(td, from, to, UIO_SYSSPACE);
  787         LFREEPATH(from);
  788         LFREEPATH(to);
  789         return (error);
  790 }
  791 
  792 int
  793 linux_renameat(struct thread *td, struct linux_renameat_args *args)
  794 {
  795         char *from, *to;
  796         int error, olddfd, newdfd;
  797 
  798         olddfd = (args->olddfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->olddfd;
  799         newdfd = (args->newdfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->newdfd;
  800         LCONVPATHEXIST_AT(td, args->oldname, &from, olddfd);
  801         /* Expand LCONVPATHCREATE so that `from' can be freed on errors */
  802         error = linux_emul_convpath(td, args->newname, UIO_USERSPACE, &to, 1, newdfd);
  803         if (to == NULL) {
  804                 LFREEPATH(from);
  805                 return (error);
  806         }
  807 
  808 #ifdef DEBUG
  809         if (ldebug(renameat))
  810                 printf(ARGS(renameat, "%s, %s"), from, to);
  811 #endif
  812         error = kern_renameat(td, olddfd, from, newdfd, to, UIO_SYSSPACE);
  813         LFREEPATH(from);
  814         LFREEPATH(to);
  815         return (error);
  816 }
  817 
  818 int
  819 linux_symlink(struct thread *td, struct linux_symlink_args *args)
  820 {
  821         char *path, *to;
  822         int error;
  823 
  824         LCONVPATHEXIST(td, args->path, &path);
  825         /* Expand LCONVPATHCREATE so that `path' can be freed on errors */
  826         error = linux_emul_convpath(td, args->to, UIO_USERSPACE, &to, 1, AT_FDCWD);
  827         if (to == NULL) {
  828                 LFREEPATH(path);
  829                 return (error);
  830         }
  831 
  832 #ifdef DEBUG
  833         if (ldebug(symlink))
  834                 printf(ARGS(symlink, "%s, %s"), path, to);
  835 #endif
  836         error = kern_symlink(td, path, to, UIO_SYSSPACE);
  837         LFREEPATH(path);
  838         LFREEPATH(to);
  839         return (error);
  840 }
  841 
  842 int
  843 linux_symlinkat(struct thread *td, struct linux_symlinkat_args *args)
  844 {
  845         char *path, *to;
  846         int error, dfd;
  847 
  848         dfd = (args->newdfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->newdfd;
  849         LCONVPATHEXIST_AT(td, args->oldname, &path, dfd);
  850         /* Expand LCONVPATHCREATE so that `path' can be freed on errors */
  851         error = linux_emul_convpath(td, args->newname, UIO_USERSPACE, &to, 1, dfd);
  852         if (to == NULL) {
  853                 LFREEPATH(path);
  854                 return (error);
  855         }
  856 
  857 #ifdef DEBUG
  858         if (ldebug(symlinkat))
  859                 printf(ARGS(symlinkat, "%s, %s"), path, to);
  860 #endif
  861 
  862         error = kern_symlinkat(td, path, dfd, to, UIO_SYSSPACE);
  863         LFREEPATH(path);
  864         LFREEPATH(to);
  865         return (error);
  866 }
  867 
  868 int
  869 linux_readlink(struct thread *td, struct linux_readlink_args *args)
  870 {
  871         char *name;
  872         int error;
  873 
  874         LCONVPATHEXIST(td, args->name, &name);
  875 
  876 #ifdef DEBUG
  877         if (ldebug(readlink))
  878                 printf(ARGS(readlink, "%s, %p, %d"), name, (void *)args->buf,
  879                     args->count);
  880 #endif
  881         error = kern_readlink(td, name, UIO_SYSSPACE, args->buf, UIO_USERSPACE,
  882             args->count);
  883         LFREEPATH(name);
  884         return (error);
  885 }
  886 
  887 int
  888 linux_readlinkat(struct thread *td, struct linux_readlinkat_args *args)
  889 {
  890         char *name;
  891         int error, dfd;
  892 
  893         dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
  894         LCONVPATHEXIST_AT(td, args->path, &name, dfd);
  895 
  896 #ifdef DEBUG
  897         if (ldebug(readlinkat))
  898                 printf(ARGS(readlinkat, "%s, %p, %d"), name, (void *)args->buf,
  899                     args->bufsiz);
  900 #endif
  901 
  902         error = kern_readlinkat(td, dfd, name, UIO_SYSSPACE, args->buf,
  903             UIO_USERSPACE, args->bufsiz);
  904         LFREEPATH(name);
  905         return (error);
  906 }
  907 
  908 int
  909 linux_truncate(struct thread *td, struct linux_truncate_args *args)
  910 {
  911         char *path;
  912         int error;
  913 
  914         LCONVPATHEXIST(td, args->path, &path);
  915 
  916 #ifdef DEBUG
  917         if (ldebug(truncate))
  918                 printf(ARGS(truncate, "%s, %ld"), path, (long)args->length);
  919 #endif
  920 
  921         error = kern_truncate(td, path, UIO_SYSSPACE, args->length);
  922         LFREEPATH(path);
  923         return (error);
  924 }
  925 
  926 int
  927 linux_truncate64(struct thread *td, struct linux_truncate64_args *args)
  928 {
  929         char *path;
  930         int error;
  931 
  932         LCONVPATHEXIST(td, args->path, &path);
  933 
  934 #ifdef DEBUG
  935         if (ldebug(truncate64))
  936                 printf(ARGS(truncate64, "%s, %jd"), path, args->length);
  937 #endif
  938 
  939         error = kern_truncate(td, path, UIO_SYSSPACE, args->length);
  940         LFREEPATH(path);
  941         return (error);
  942 }
  943 int
  944 linux_ftruncate(struct thread *td, struct linux_ftruncate_args *args)
  945 {
  946         struct ftruncate_args /* {
  947                 int fd;
  948                 int pad;
  949                 off_t length;
  950                 } */ nuap;
  951            
  952         nuap.fd = args->fd;
  953         nuap.length = args->length;
  954         return (sys_ftruncate(td, &nuap));
  955 }
  956 
  957 int
  958 linux_link(struct thread *td, struct linux_link_args *args)
  959 {
  960         char *path, *to;
  961         int error;
  962 
  963         LCONVPATHEXIST(td, args->path, &path);
  964         /* Expand LCONVPATHCREATE so that `path' can be freed on errors */
  965         error = linux_emul_convpath(td, args->to, UIO_USERSPACE, &to, 1, AT_FDCWD);
  966         if (to == NULL) {
  967                 LFREEPATH(path);
  968                 return (error);
  969         }
  970 
  971 #ifdef DEBUG
  972         if (ldebug(link))
  973                 printf(ARGS(link, "%s, %s"), path, to);
  974 #endif
  975         error = kern_link(td, path, to, UIO_SYSSPACE);
  976         LFREEPATH(path);
  977         LFREEPATH(to);
  978         return (error);
  979 }
  980 
  981 int
  982 linux_linkat(struct thread *td, struct linux_linkat_args *args)
  983 {
  984         char *path, *to;
  985         int error, olddfd, newdfd;
  986 
  987         /*
  988          * They really introduced flags argument which is forbidden to
  989          * use.
  990          */
  991         if (args->flags != 0)
  992                 return (EINVAL);
  993 
  994         olddfd = (args->olddfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->olddfd;
  995         newdfd = (args->newdfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->newdfd;
  996         LCONVPATHEXIST_AT(td, args->oldname, &path, olddfd);
  997         /* Expand LCONVPATHCREATE so that `path' can be freed on errors */
  998         error = linux_emul_convpath(td, args->newname, UIO_USERSPACE, &to, 1, newdfd);
  999         if (to == NULL) {
 1000                 LFREEPATH(path);
 1001                 return (error);
 1002         }
 1003 
 1004 #ifdef DEBUG
 1005         if (ldebug(linkat))
 1006                 printf(ARGS(linkat, "%i, %s, %i, %s, %i"), args->olddfd, path,
 1007                         args->newdfd, to, args->flags);
 1008 #endif
 1009 
 1010         error = kern_linkat(td, olddfd, newdfd, path, to, UIO_SYSSPACE, FOLLOW);
 1011         LFREEPATH(path);
 1012         LFREEPATH(to);
 1013         return (error);
 1014 }
 1015 
 1016 int
 1017 linux_fdatasync(td, uap)
 1018         struct thread *td;
 1019         struct linux_fdatasync_args *uap;
 1020 {
 1021         struct fsync_args bsd;
 1022 
 1023         bsd.fd = uap->fd;
 1024         return sys_fsync(td, &bsd);
 1025 }
 1026 
 1027 int
 1028 linux_pread(td, uap)
 1029         struct thread *td;
 1030         struct linux_pread_args *uap;
 1031 {
 1032         struct pread_args bsd;
 1033         struct vnode *vp;
 1034         int error;
 1035 
 1036         bsd.fd = uap->fd;
 1037         bsd.buf = uap->buf;
 1038         bsd.nbyte = uap->nbyte;
 1039         bsd.offset = uap->offset;
 1040 
 1041         error = sys_pread(td, &bsd);
 1042 
 1043         if (error == 0) {
 1044                 /* This seems to violate POSIX but linux does it */
 1045                 if ((error = fgetvp(td, uap->fd, CAP_READ, &vp)) != 0)
 1046                         return (error);
 1047                 if (vp->v_type == VDIR) {
 1048                         vrele(vp);
 1049                         return (EISDIR);
 1050                 }
 1051                 vrele(vp);
 1052         }
 1053 
 1054         return (error);
 1055 }
 1056 
 1057 int
 1058 linux_pwrite(td, uap)
 1059         struct thread *td;
 1060         struct linux_pwrite_args *uap;
 1061 {
 1062         struct pwrite_args bsd;
 1063 
 1064         bsd.fd = uap->fd;
 1065         bsd.buf = uap->buf;
 1066         bsd.nbyte = uap->nbyte;
 1067         bsd.offset = uap->offset;
 1068         return sys_pwrite(td, &bsd);
 1069 }
 1070 
 1071 int
 1072 linux_mount(struct thread *td, struct linux_mount_args *args)
 1073 {
 1074         struct ufs_args ufs;
 1075         char fstypename[MFSNAMELEN];
 1076         char mntonname[MNAMELEN], mntfromname[MNAMELEN];
 1077         int error;
 1078         int fsflags;
 1079         void *fsdata;
 1080 
 1081         error = copyinstr(args->filesystemtype, fstypename, MFSNAMELEN - 1,
 1082             NULL);
 1083         if (error)
 1084                 return (error);
 1085         error = copyinstr(args->specialfile, mntfromname, MNAMELEN - 1, NULL);
 1086         if (error)
 1087                 return (error);
 1088         error = copyinstr(args->dir, mntonname, MNAMELEN - 1, NULL);
 1089         if (error)
 1090                 return (error);
 1091 
 1092 #ifdef DEBUG
 1093         if (ldebug(mount))
 1094                 printf(ARGS(mount, "%s, %s, %s"),
 1095                     fstypename, mntfromname, mntonname);
 1096 #endif
 1097 
 1098         if (strcmp(fstypename, "ext2") == 0) {
 1099                 strcpy(fstypename, "ext2fs");
 1100                 fsdata = &ufs;
 1101                 ufs.fspec = mntfromname;
 1102 #define DEFAULT_ROOTID          -2
 1103                 ufs.export.ex_root = DEFAULT_ROOTID;
 1104                 ufs.export.ex_flags =
 1105                     args->rwflag & LINUX_MS_RDONLY ? MNT_EXRDONLY : 0;
 1106         } else if (strcmp(fstypename, "proc") == 0) {
 1107                 strcpy(fstypename, "linprocfs");
 1108                 fsdata = NULL;
 1109         } else if (strcmp(fstypename, "vfat") == 0) {
 1110                 strcpy(fstypename, "msdosfs");
 1111                 fsdata = NULL;
 1112         } else {
 1113                 return (ENODEV);
 1114         }
 1115 
 1116         fsflags = 0;
 1117 
 1118         if ((args->rwflag & 0xffff0000) == 0xc0ed0000) {
 1119                 /*
 1120                  * Linux SYNC flag is not included; the closest equivalent
 1121                  * FreeBSD has is !ASYNC, which is our default.
 1122                  */
 1123                 if (args->rwflag & LINUX_MS_RDONLY)
 1124                         fsflags |= MNT_RDONLY;
 1125                 if (args->rwflag & LINUX_MS_NOSUID)
 1126                         fsflags |= MNT_NOSUID;
 1127                 if (args->rwflag & LINUX_MS_NOEXEC)
 1128                         fsflags |= MNT_NOEXEC;
 1129                 if (args->rwflag & LINUX_MS_REMOUNT)
 1130                         fsflags |= MNT_UPDATE;
 1131         }
 1132 
 1133         if (strcmp(fstypename, "linprocfs") == 0) {
 1134                 error = kernel_vmount(fsflags,
 1135                         "fstype", fstypename,
 1136                         "fspath", mntonname,
 1137                         NULL);
 1138         } else if (strcmp(fstypename, "msdosfs") == 0) {
 1139                 error = kernel_vmount(fsflags,
 1140                         "fstype", fstypename,
 1141                         "fspath", mntonname,
 1142                         "from", mntfromname,
 1143                         NULL);
 1144         } else
 1145                 error = EOPNOTSUPP;
 1146         return (error);
 1147 }
 1148 
 1149 int
 1150 linux_oldumount(struct thread *td, struct linux_oldumount_args *args)
 1151 {
 1152         struct linux_umount_args args2;
 1153 
 1154         args2.path = args->path;
 1155         args2.flags = 0;
 1156         return (linux_umount(td, &args2));
 1157 }
 1158 
 1159 int
 1160 linux_umount(struct thread *td, struct linux_umount_args *args)
 1161 {
 1162         struct unmount_args bsd;
 1163 
 1164         bsd.path = args->path;
 1165         bsd.flags = args->flags;        /* XXX correct? */
 1166         return (sys_unmount(td, &bsd));
 1167 }
 1168 
 1169 /*
 1170  * fcntl family of syscalls
 1171  */
 1172 
 1173 struct l_flock {
 1174         l_short         l_type;
 1175         l_short         l_whence;
 1176         l_off_t         l_start;
 1177         l_off_t         l_len;
 1178         l_pid_t         l_pid;
 1179 }
 1180 #if defined(__amd64__) && defined(COMPAT_LINUX32)
 1181 __packed
 1182 #endif
 1183 ;
 1184 
 1185 static void
 1186 linux_to_bsd_flock(struct l_flock *linux_flock, struct flock *bsd_flock)
 1187 {
 1188         switch (linux_flock->l_type) {
 1189         case LINUX_F_RDLCK:
 1190                 bsd_flock->l_type = F_RDLCK;
 1191                 break;
 1192         case LINUX_F_WRLCK:
 1193                 bsd_flock->l_type = F_WRLCK;
 1194                 break;
 1195         case LINUX_F_UNLCK:
 1196                 bsd_flock->l_type = F_UNLCK;
 1197                 break;
 1198         default:
 1199                 bsd_flock->l_type = -1;
 1200                 break;
 1201         }
 1202         bsd_flock->l_whence = linux_flock->l_whence;
 1203         bsd_flock->l_start = (off_t)linux_flock->l_start;
 1204         bsd_flock->l_len = (off_t)linux_flock->l_len;
 1205         bsd_flock->l_pid = (pid_t)linux_flock->l_pid;
 1206         bsd_flock->l_sysid = 0;
 1207 }
 1208 
 1209 static void
 1210 bsd_to_linux_flock(struct flock *bsd_flock, struct l_flock *linux_flock)
 1211 {
 1212         switch (bsd_flock->l_type) {
 1213         case F_RDLCK:
 1214                 linux_flock->l_type = LINUX_F_RDLCK;
 1215                 break;
 1216         case F_WRLCK:
 1217                 linux_flock->l_type = LINUX_F_WRLCK;
 1218                 break;
 1219         case F_UNLCK:
 1220                 linux_flock->l_type = LINUX_F_UNLCK;
 1221                 break;
 1222         }
 1223         linux_flock->l_whence = bsd_flock->l_whence;
 1224         linux_flock->l_start = (l_off_t)bsd_flock->l_start;
 1225         linux_flock->l_len = (l_off_t)bsd_flock->l_len;
 1226         linux_flock->l_pid = (l_pid_t)bsd_flock->l_pid;
 1227 }
 1228 
 1229 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
 1230 struct l_flock64 {
 1231         l_short         l_type;
 1232         l_short         l_whence;
 1233         l_loff_t        l_start;
 1234         l_loff_t        l_len;
 1235         l_pid_t         l_pid;
 1236 }
 1237 #if defined(__amd64__) && defined(COMPAT_LINUX32)
 1238 __packed
 1239 #endif
 1240 ;
 1241 
 1242 static void
 1243 linux_to_bsd_flock64(struct l_flock64 *linux_flock, struct flock *bsd_flock)
 1244 {
 1245         switch (linux_flock->l_type) {
 1246         case LINUX_F_RDLCK:
 1247                 bsd_flock->l_type = F_RDLCK;
 1248                 break;
 1249         case LINUX_F_WRLCK:
 1250                 bsd_flock->l_type = F_WRLCK;
 1251                 break;
 1252         case LINUX_F_UNLCK:
 1253                 bsd_flock->l_type = F_UNLCK;
 1254                 break;
 1255         default:
 1256                 bsd_flock->l_type = -1;
 1257                 break;
 1258         }
 1259         bsd_flock->l_whence = linux_flock->l_whence;
 1260         bsd_flock->l_start = (off_t)linux_flock->l_start;
 1261         bsd_flock->l_len = (off_t)linux_flock->l_len;
 1262         bsd_flock->l_pid = (pid_t)linux_flock->l_pid;
 1263         bsd_flock->l_sysid = 0;
 1264 }
 1265 
 1266 static void
 1267 bsd_to_linux_flock64(struct flock *bsd_flock, struct l_flock64 *linux_flock)
 1268 {
 1269         switch (bsd_flock->l_type) {
 1270         case F_RDLCK:
 1271                 linux_flock->l_type = LINUX_F_RDLCK;
 1272                 break;
 1273         case F_WRLCK:
 1274                 linux_flock->l_type = LINUX_F_WRLCK;
 1275                 break;
 1276         case F_UNLCK:
 1277                 linux_flock->l_type = LINUX_F_UNLCK;
 1278                 break;
 1279         }
 1280         linux_flock->l_whence = bsd_flock->l_whence;
 1281         linux_flock->l_start = (l_loff_t)bsd_flock->l_start;
 1282         linux_flock->l_len = (l_loff_t)bsd_flock->l_len;
 1283         linux_flock->l_pid = (l_pid_t)bsd_flock->l_pid;
 1284 }
 1285 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
 1286 
 1287 static int
 1288 fcntl_common(struct thread *td, struct linux_fcntl64_args *args)
 1289 {
 1290         struct l_flock linux_flock;
 1291         struct flock bsd_flock;
 1292         struct file *fp;
 1293         long arg;
 1294         int error, result;
 1295 
 1296         switch (args->cmd) {
 1297         case LINUX_F_DUPFD:
 1298                 return (kern_fcntl(td, args->fd, F_DUPFD, args->arg));
 1299 
 1300         case LINUX_F_GETFD:
 1301                 return (kern_fcntl(td, args->fd, F_GETFD, 0));
 1302 
 1303         case LINUX_F_SETFD:
 1304                 return (kern_fcntl(td, args->fd, F_SETFD, args->arg));
 1305 
 1306         case LINUX_F_GETFL:
 1307                 error = kern_fcntl(td, args->fd, F_GETFL, 0);
 1308                 result = td->td_retval[0];
 1309                 td->td_retval[0] = 0;
 1310                 if (result & O_RDONLY)
 1311                         td->td_retval[0] |= LINUX_O_RDONLY;
 1312                 if (result & O_WRONLY)
 1313                         td->td_retval[0] |= LINUX_O_WRONLY;
 1314                 if (result & O_RDWR)
 1315                         td->td_retval[0] |= LINUX_O_RDWR;
 1316                 if (result & O_NDELAY)
 1317                         td->td_retval[0] |= LINUX_O_NONBLOCK;
 1318                 if (result & O_APPEND)
 1319                         td->td_retval[0] |= LINUX_O_APPEND;
 1320                 if (result & O_FSYNC)
 1321                         td->td_retval[0] |= LINUX_O_SYNC;
 1322                 if (result & O_ASYNC)
 1323                         td->td_retval[0] |= LINUX_FASYNC;
 1324 #ifdef LINUX_O_NOFOLLOW
 1325                 if (result & O_NOFOLLOW)
 1326                         td->td_retval[0] |= LINUX_O_NOFOLLOW;
 1327 #endif
 1328 #ifdef LINUX_O_DIRECT
 1329                 if (result & O_DIRECT)
 1330                         td->td_retval[0] |= LINUX_O_DIRECT;
 1331 #endif
 1332                 return (error);
 1333 
 1334         case LINUX_F_SETFL:
 1335                 arg = 0;
 1336                 if (args->arg & LINUX_O_NDELAY)
 1337                         arg |= O_NONBLOCK;
 1338                 if (args->arg & LINUX_O_APPEND)
 1339                         arg |= O_APPEND;
 1340                 if (args->arg & LINUX_O_SYNC)
 1341                         arg |= O_FSYNC;
 1342                 if (args->arg & LINUX_FASYNC)
 1343                         arg |= O_ASYNC;
 1344 #ifdef LINUX_O_NOFOLLOW
 1345                 if (args->arg & LINUX_O_NOFOLLOW)
 1346                         arg |= O_NOFOLLOW;
 1347 #endif
 1348 #ifdef LINUX_O_DIRECT
 1349                 if (args->arg & LINUX_O_DIRECT)
 1350                         arg |= O_DIRECT;
 1351 #endif
 1352                 return (kern_fcntl(td, args->fd, F_SETFL, arg));
 1353 
 1354         case LINUX_F_GETLK:
 1355                 error = copyin((void *)args->arg, &linux_flock,
 1356                     sizeof(linux_flock));
 1357                 if (error)
 1358                         return (error);
 1359                 linux_to_bsd_flock(&linux_flock, &bsd_flock);
 1360                 error = kern_fcntl(td, args->fd, F_GETLK, (intptr_t)&bsd_flock);
 1361                 if (error)
 1362                         return (error);
 1363                 bsd_to_linux_flock(&bsd_flock, &linux_flock);
 1364                 return (copyout(&linux_flock, (void *)args->arg,
 1365                     sizeof(linux_flock)));
 1366 
 1367         case LINUX_F_SETLK:
 1368                 error = copyin((void *)args->arg, &linux_flock,
 1369                     sizeof(linux_flock));
 1370                 if (error)
 1371                         return (error);
 1372                 linux_to_bsd_flock(&linux_flock, &bsd_flock);
 1373                 return (kern_fcntl(td, args->fd, F_SETLK,
 1374                     (intptr_t)&bsd_flock));
 1375 
 1376         case LINUX_F_SETLKW:
 1377                 error = copyin((void *)args->arg, &linux_flock,
 1378                     sizeof(linux_flock));
 1379                 if (error)
 1380                         return (error);
 1381                 linux_to_bsd_flock(&linux_flock, &bsd_flock);
 1382                 return (kern_fcntl(td, args->fd, F_SETLKW,
 1383                      (intptr_t)&bsd_flock));
 1384 
 1385         case LINUX_F_GETOWN:
 1386                 return (kern_fcntl(td, args->fd, F_GETOWN, 0));
 1387 
 1388         case LINUX_F_SETOWN:
 1389                 /*
 1390                  * XXX some Linux applications depend on F_SETOWN having no
 1391                  * significant effect for pipes (SIGIO is not delivered for
 1392                  * pipes under Linux-2.2.35 at least).
 1393                  */
 1394                 error = fget(td, args->fd, CAP_FCNTL, &fp);
 1395                 if (error)
 1396                         return (error);
 1397                 if (fp->f_type == DTYPE_PIPE) {
 1398                         fdrop(fp, td);
 1399                         return (EINVAL);
 1400                 }
 1401                 fdrop(fp, td);
 1402 
 1403                 return (kern_fcntl(td, args->fd, F_SETOWN, args->arg));
 1404         }
 1405 
 1406         return (EINVAL);
 1407 }
 1408 
 1409 int
 1410 linux_fcntl(struct thread *td, struct linux_fcntl_args *args)
 1411 {
 1412         struct linux_fcntl64_args args64;
 1413 
 1414 #ifdef DEBUG
 1415         if (ldebug(fcntl))
 1416                 printf(ARGS(fcntl, "%d, %08x, *"), args->fd, args->cmd);
 1417 #endif
 1418 
 1419         args64.fd = args->fd;
 1420         args64.cmd = args->cmd;
 1421         args64.arg = args->arg;
 1422         return (fcntl_common(td, &args64));
 1423 }
 1424 
 1425 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
 1426 int
 1427 linux_fcntl64(struct thread *td, struct linux_fcntl64_args *args)
 1428 {
 1429         struct l_flock64 linux_flock;
 1430         struct flock bsd_flock;
 1431         int error;
 1432 
 1433 #ifdef DEBUG
 1434         if (ldebug(fcntl64))
 1435                 printf(ARGS(fcntl64, "%d, %08x, *"), args->fd, args->cmd);
 1436 #endif
 1437 
 1438         switch (args->cmd) {
 1439         case LINUX_F_GETLK64:
 1440                 error = copyin((void *)args->arg, &linux_flock,
 1441                     sizeof(linux_flock));
 1442                 if (error)
 1443                         return (error);
 1444                 linux_to_bsd_flock64(&linux_flock, &bsd_flock);
 1445                 error = kern_fcntl(td, args->fd, F_GETLK, (intptr_t)&bsd_flock);
 1446                 if (error)
 1447                         return (error);
 1448                 bsd_to_linux_flock64(&bsd_flock, &linux_flock);
 1449                 return (copyout(&linux_flock, (void *)args->arg,
 1450                             sizeof(linux_flock)));
 1451 
 1452         case LINUX_F_SETLK64:
 1453                 error = copyin((void *)args->arg, &linux_flock,
 1454                     sizeof(linux_flock));
 1455                 if (error)
 1456                         return (error);
 1457                 linux_to_bsd_flock64(&linux_flock, &bsd_flock);
 1458                 return (kern_fcntl(td, args->fd, F_SETLK,
 1459                     (intptr_t)&bsd_flock));
 1460 
 1461         case LINUX_F_SETLKW64:
 1462                 error = copyin((void *)args->arg, &linux_flock,
 1463                     sizeof(linux_flock));
 1464                 if (error)
 1465                         return (error);
 1466                 linux_to_bsd_flock64(&linux_flock, &bsd_flock);
 1467                 return (kern_fcntl(td, args->fd, F_SETLKW,
 1468                     (intptr_t)&bsd_flock));
 1469         }
 1470 
 1471         return (fcntl_common(td, args));
 1472 }
 1473 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
 1474 
 1475 int
 1476 linux_chown(struct thread *td, struct linux_chown_args *args)
 1477 {
 1478         char *path;
 1479         int error;
 1480 
 1481         LCONVPATHEXIST(td, args->path, &path);
 1482 
 1483 #ifdef DEBUG
 1484         if (ldebug(chown))
 1485                 printf(ARGS(chown, "%s, %d, %d"), path, args->uid, args->gid);
 1486 #endif
 1487         error = kern_chown(td, path, UIO_SYSSPACE, args->uid, args->gid);
 1488         LFREEPATH(path);
 1489         return (error);
 1490 }
 1491 
 1492 int
 1493 linux_fchownat(struct thread *td, struct linux_fchownat_args *args)
 1494 {
 1495         char *path;
 1496         int error, dfd, follow;
 1497 
 1498         if (args->flag & ~LINUX_AT_SYMLINK_NOFOLLOW)
 1499                 return (EINVAL);
 1500 
 1501         dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD :  args->dfd;
 1502         LCONVPATHEXIST_AT(td, args->filename, &path, dfd);
 1503 
 1504 #ifdef DEBUG
 1505         if (ldebug(fchownat))
 1506                 printf(ARGS(fchownat, "%s, %d, %d"), path, args->uid, args->gid);
 1507 #endif
 1508 
 1509         follow = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) == 0 ? 0 :
 1510             AT_SYMLINK_NOFOLLOW;
 1511         error = kern_fchownat(td, dfd, path, UIO_SYSSPACE, args->uid, args->gid,
 1512             follow);
 1513         LFREEPATH(path);
 1514         return (error);
 1515 }
 1516 
 1517 int
 1518 linux_lchown(struct thread *td, struct linux_lchown_args *args)
 1519 {
 1520         char *path;
 1521         int error;
 1522 
 1523         LCONVPATHEXIST(td, args->path, &path);
 1524 
 1525 #ifdef DEBUG
 1526         if (ldebug(lchown))
 1527                 printf(ARGS(lchown, "%s, %d, %d"), path, args->uid, args->gid);
 1528 #endif
 1529         error = kern_lchown(td, path, UIO_SYSSPACE, args->uid, args->gid);
 1530         LFREEPATH(path);
 1531         return (error);
 1532 }
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FreeBSD/Linux Kernel Cross Reference sys/compat/linux/linux_file.c

FreeBSD/Linux Kernel Cross Reference
sys/compat/linux/linux_file.c
