darwin_mount.c

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    1 /*      $NetBSD: darwin_mount.c,v 1.18 2008/06/24 11:18:15 ad Exp $ */
    2 
    3 /*-
    4  * Copyright (c) 2003, 2008 The NetBSD Foundation, Inc.
    5  * All rights reserved.
    6  *
    7  * This code is derived from software contributed to The NetBSD Foundation
    8  * by Emmanuel Dreyfus.
    9  *
   10  * Redistribution and use in source and binary forms, with or without
   11  * modification, are permitted provided that the following conditions
   12  * are met:
   13  * 1. Redistributions of source code must retain the above copyright
   14  *    notice, this list of conditions and the following disclaimer.
   15  * 2. Redistributions in binary form must reproduce the above copyright
   16  *    notice, this list of conditions and the following disclaimer in the
   17  *    documentation and/or other materials provided with the distribution.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   29  * POSSIBILITY OF SUCH DAMAGE.
   30  */
   31 
   32 #include <sys/cdefs.h>
   33 __KERNEL_RCSID(0, "$NetBSD: darwin_mount.c,v 1.18 2008/06/24 11:18:15 ad Exp $");
   34 
   35 #include <sys/types.h>
   36 #include <sys/param.h>
   37 #include <sys/systm.h>
   38 #include <sys/mount.h>
   39 #include <sys/proc.h>
   40 #include <sys/vnode.h>
   41 #include <sys/namei.h>
   42 #include <sys/file.h>
   43 #include <sys/filedesc.h>
   44 #include <sys/syscallargs.h>
   45 
   46 #include <compat/sys/signal.h>
   47 
   48 #include <compat/mach/mach_types.h>
   49 #include <compat/mach/mach_vm.h>
   50 
   51 #include <compat/darwin/darwin_audit.h>
   52 #include <compat/darwin/darwin_mount.h>
   53 #include <compat/darwin/darwin_syscallargs.h>
   54 
   55 static void native_to_darwin_statvfs(const struct statvfs *,
   56     struct darwin_statfs *);
   57 
   58 int
   59 darwin_sys_fstatfs(struct lwp *l, const struct darwin_sys_fstatfs_args *uap, register_t *retval)
   60 {
   61         /* {
   62                 syscallarg(int) fd;
   63                 syscallarg(struct darwin_statfs *) buf;
   64         } */
   65         file_t *fp;
   66         struct mount *mp;
   67         struct statvfs *bs;
   68         struct darwin_statfs ds;
   69         int error;
   70 
   71         /* fd_getvnode() will use the descriptor for us */
   72         if ((error = fd_getvnode(SCARG(uap, fd), &fp)))
   73                 return (error);
   74 
   75         mp = ((struct vnode *)fp->f_data)->v_mount;
   76         bs = &mp->mnt_stat;
   77 
   78         if ((error = VFS_STATVFS(mp, bs)) != 0)
   79                 goto out;
   80 
   81         native_to_darwin_statvfs(bs, &ds);
   82 
   83         error = copyout(&ds, SCARG(uap, buf), sizeof(ds));
   84 
   85 out:
   86         fd_putfile(SCARG(uap, fd));
   87         return (error);
   88 }
   89 
   90 int
   91 darwin_sys_getfsstat(struct lwp *l, const struct darwin_sys_getfsstat_args *uap, register_t *retval)
   92 {
   93         /* {
   94                 syscallarg(struct darwin_statfs *) buf;
   95                 syscallarg(long) bufsize;
   96                 syscallarg(int) flags;
   97         } */
   98         struct mount *mp, *nmp;
   99         struct statvfs *bs;
  100         struct darwin_statfs ds;
  101         struct darwin_statfs *uds;
  102         long count, maxcount, error;
  103 
  104         maxcount = SCARG(uap, bufsize) / sizeof(struct darwin_statfs);
  105         uds = SCARG(uap, buf);
  106 
  107         for (count = 0, mp = mountlist.cqh_first;
  108             mp != (void *)&mountlist; mp = nmp) {
  109                 nmp = mp->mnt_list.cqe_next;
  110 
  111                 if ((uds != NULL) && (count < maxcount)) {
  112                         bs = &mp->mnt_stat;
  113 
  114                         if (((SCARG(uap, flags) & MNT_NOWAIT) == 0 ||
  115                             (SCARG(uap, flags) & MNT_WAIT)) &&
  116                             (error = VFS_STATVFS(mp, bs)))
  117                                 continue;
  118 
  119                         native_to_darwin_statvfs(bs, &ds);
  120 
  121                         if ((error = copyout(&ds, uds, sizeof(*uds))) != 0)
  122                                 return error;
  123                         uds++;
  124                 }
  125                 count++;
  126         }
  127 
  128         if ((uds != NULL) && (count > maxcount))
  129                 *retval = maxcount;
  130         else
  131                 *retval = count;
  132 
  133         return 0;
  134 }
  135 
  136 int
  137 darwin_sys_statfs(struct lwp *l, const struct darwin_sys_statfs_args *uap, register_t *retval)
  138 {
  139         /* {
  140                 syscallarg(char *) path;
  141                 syscallarg(struct statfs *) buf;
  142         } */
  143         struct mount *mp;
  144         struct statvfs *bs;
  145         struct darwin_statfs ds;
  146         struct nameidata nd;
  147         int error;
  148 
  149         NDINIT(&nd, LOOKUP, FOLLOW | TRYEMULROOT, UIO_USERSPACE,
  150             SCARG(uap, path));
  151         if ((error = namei(&nd)) != 0)
  152                 return error;
  153 
  154         mp = nd.ni_vp->v_mount;
  155         bs = &mp->mnt_stat;
  156         vrele(nd.ni_vp);
  157 
  158         if ((error = VFS_STATVFS(mp, bs)) != 0)
  159                 return error;
  160 
  161         native_to_darwin_statvfs(bs, &ds);
  162 
  163         error = copyout(&ds, SCARG(uap, buf), sizeof(ds));
  164 
  165         return error;
  166 }
  167 
  168 
  169 static void
  170 native_to_darwin_statvfs(const struct statvfs *bs, struct darwin_statfs *ds)
  171 {
  172         long dflags = 0;
  173         long sflags = bs->f_flag & MNT_VISFLAGMASK;
  174 
  175         if (sflags|MNT_RDONLY)
  176                 dflags |= DARWIN_MNT_RDONLY;
  177         if (sflags|MNT_SYNCHRONOUS)
  178                 dflags |= DARWIN_MNT_SYNCHRONOUS;
  179         if (sflags|MNT_NOEXEC)
  180                 dflags |= DARWIN_MNT_NOEXEC;
  181         if (sflags|MNT_NOSUID)
  182                 dflags |= DARWIN_MNT_NOSUID;
  183         if (sflags|MNT_NODEV)
  184                 dflags |= DARWIN_MNT_NODEV;
  185         if (sflags|MNT_UNION)
  186                 dflags |= DARWIN_MNT_UNION;
  187         if (sflags|MNT_ASYNC)
  188                 dflags |= DARWIN_MNT_ASYNC;
  189         if (sflags|MNT_IGNORE)
  190                 dflags |= DARWIN_MNT_DONTBROWSE;
  191 
  192         ds->f_otype = 0;
  193         ds->f_oflags = dflags & 0xffff;
  194         ds->f_bsize = bs->f_bsize;
  195         ds->f_iosize = bs->f_iosize;
  196         ds->f_blocks = bs->f_blocks;
  197         ds->f_bfree = bs->f_bfree;
  198         ds->f_bavail = bs->f_bavail;
  199         ds->f_files = bs->f_files;
  200         ds->f_ffree = bs->f_ffree;
  201         (void)memcpy(&ds->f_fsid, &bs->f_fsidx, sizeof(ds->f_fsid));
  202         ds->f_owner = bs->f_owner;
  203         ds->f_reserved1 = 0;
  204         ds->f_type = 0;
  205         ds->f_flags = dflags;
  206         (void)strlcpy(ds->f_fstypename, bs->f_fstypename, DARWIN_MFSNAMELEN);
  207         (void)strlcpy(ds->f_mntonname, bs->f_mntonname, DARWIN_MNAMELEN);
  208         (void)strlcpy(ds->f_mntfromname, bs->f_mntfromname, DARWIN_MNAMELEN);
  209 
  210         return;
  211 }

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FreeBSD/Linux Kernel Cross Reference sys/compat/darwin/darwin_mount.c

FreeBSD/Linux Kernel Cross Reference
sys/compat/darwin/darwin_mount.c