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

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