sys/emulation/dragonfly12/dfbsd12_stat.c

   1 /*-
   2  * Copyright (c) 2005 The DragonFly Project.  All rights reserved.
   3  *
   4  * This code is derived from software contributed to The DragonFly Project
   5  * by Joerg Sonnenberger <joerg@bec.de>.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  *
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in
  15  *    the documentation and/or other materials provided with the
  16  *    distribution.
  17  * 3. Neither the name of The DragonFly Project nor the names of its
  18  *    contributors may be used to endorse or promote products derived
  19  *    from this software without specific, prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  24  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  25  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  26  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  27  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  28  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  29  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  30  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  31  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  * $DragonFly: src/sys/emulation/dragonfly12/dfbsd12_stat.c,v 1.4 2008/09/17 21:44:16 dillon Exp $
  35  */
  36
  37 #include "opt_compatdf12.h"
  38
  39 #include <sys/param.h>
  40 #include <sys/kern_syscall.h>
  41 #include <sys/mount.h>
  42 #include <sys/nlookup.h>
  43 #include <sys/proc.h>
  44 #include <sys/priv.h>
  45 #include <sys/stat.h>
  46 #include <sys/sysproto.h>
  47 #include <sys/systm.h>
  48 #include <sys/thread.h>
  49 #include <sys/vnode.h>
  50 #include <emulation/dragonfly12/stat.h>
  51
  52 #include <sys/mplock2.h>
  53
  54 static void
  55 cvtstat(struct dfbsd12_stat *oldstat, struct stat *newstat)
  56 {
  57         bzero(oldstat, sizeof(oldstat));
  58
  59         oldstat->st_dev = newstat->st_dev;
  60         oldstat->st_ino = newstat->st_ino;      /* truncation */
  61         oldstat->st_mode = newstat->st_mode;
  62         oldstat->st_nlink = newstat->st_nlink;  /* truncation */
  63         oldstat->st_uid = newstat->st_uid;
  64         oldstat->st_gid = newstat->st_gid;
  65         oldstat->st_rdev = newstat->st_rdev;
  66         oldstat->st_atimespec = newstat->st_atimespec;
  67         oldstat->st_mtimespec = newstat->st_mtimespec;
  68         oldstat->st_ctimespec = newstat->st_ctimespec;
  69         oldstat->st_size = newstat->st_size;
  70         oldstat->st_blocks = newstat->st_blocks;
  71         oldstat->st_blksize = newstat->st_blksize;
  72         oldstat->st_flags = newstat->st_flags;
  73         oldstat->st_gen = newstat->st_gen;
  74 }
  75
  76 /*
  77  * stat_args(char *path, struct dfbsd12_stat *ub)
  78  *
  79  * Get file status; this version follows links.
  80  *
  81  * MPALMOSTSAFE
  82  */
  83 int
  84 sys_dfbsd12_stat(struct dfbsd12_stat_args *uap)
  85 {
  86         struct nlookupdata nd;
  87         struct dfbsd12_stat ost;
  88         struct stat st;
  89         int error;
  90
  91         get_mplock();
  92         error = nlookup_init(&nd, uap->path, UIO_USERSPACE, NLC_FOLLOW);
  93         if (error == 0) {
  94                 error = kern_stat(&nd, &st);
  95                 if (error == 0) {
  96                         cvtstat(&ost, &st);
  97                         error = copyout(&ost, uap->ub, sizeof(ost));
  98                 }
  99         }
 100         nlookup_done(&nd);
 101         rel_mplock();
 102         return (error);
 103 }
 104
 105 /*
 106  * lstat_args(char *path, struct dfbsd12_stat *ub)
 107  *
 108  * Get file status; this version does not follow links.
 109  *
 110  * MPALMOSTSAFE
 111  */
 112 int
 113 sys_dfbsd12_lstat(struct dfbsd12_lstat_args *uap)
 114 {
 115         struct nlookupdata nd;
 116         struct dfbsd12_stat ost;
 117         struct stat st;
 118         int error;
 119
 120         get_mplock();
 121         error = nlookup_init(&nd, uap->path, UIO_USERSPACE, 0);
 122         if (error == 0) {
 123                 error = kern_stat(&nd, &st);
 124                 if (error == 0) {
 125                         cvtstat(&ost, &st);
 126                         error = copyout(&ost, uap->ub, sizeof(ost));
 127                 }
 128         }
 129         nlookup_done(&nd);
 130         rel_mplock();
 131         return (error);
 132 }
 133
 134 /*
 135  * fhstat_args(struct fhandle *u_fhp, struct dfbsd12_stat *sb)
 136  *
 137  * MPALMOSTSAFE
 138  */
 139 int
 140 sys_dfbsd12_fhstat(struct dfbsd12_fhstat_args *uap)
 141 {
 142         struct thread *td = curthread;
 143         struct dfbsd12_stat osb;
 144         struct stat sb;
 145         fhandle_t fh;
 146         struct mount *mp;
 147         struct vnode *vp;
 148         int error;
 149
 150         /*
 151          * Must be super user
 152          */
 153         error = priv_check(td, PRIV_ROOT);
 154         if (error)
 155                 return (error);
 156
 157         error = copyin(uap->u_fhp, &fh, sizeof(fhandle_t));
 158         if (error)
 159                 return (error);
 160
 161         get_mplock();
 162         if ((mp = vfs_getvfs(&fh.fh_fsid)) == NULL) {
 163                 error = ESTALE;
 164                 goto done;
 165         }
 166         if ((error = VFS_FHTOVP(mp, NULL, &fh.fh_fid, &vp)))
 167                 goto done;
 168         error = vn_stat(vp, &sb, td->td_ucred);
 169         vput(vp);
 170         if (error)
 171                 goto done;
 172         cvtstat(&osb, &sb);
 173         error = copyout(&osb, uap->sb, sizeof(osb));
 174 done:
 175         rel_mplock();
 176         return (error);
 177 }
 178
 179 /*
 180  * dfbsd12_fstat_args(int fd, struct dfbsd12_stat *sb)
 181  *
 182  * MPALMOSTSAFE
 183  */
 184 int
 185 sys_dfbsd12_fstat(struct dfbsd12_fstat_args *uap)
 186 {
 187         struct dfbsd12_stat ost;
 188         struct stat st;
 189         int error;
 190
 191         get_mplock();
 192         error = kern_fstat(uap->fd, &st);
 193         rel_mplock();
 194
 195         if (error == 0) {
 196                 cvtstat(&ost, &st);
 197                 error = copyout(&ost, uap->sb, sizeof(ost));
 198         }
 199         return (error);
 200 }