The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/emulation/dragonfly12/dfbsd12_stat.c

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    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 
   35 #include "opt_compatdf12.h"
   36 
   37 #include <sys/param.h>
   38 #include <sys/kern_syscall.h>
   39 #include <sys/mount.h>
   40 #include <sys/nlookup.h>
   41 #include <sys/proc.h>
   42 #include <sys/priv.h>
   43 #include <sys/stat.h>
   44 #include <sys/sysproto.h>
   45 #include <sys/systm.h>
   46 #include <sys/thread.h>
   47 #include <sys/vnode.h>
   48 #include <emulation/dragonfly12/stat.h>
   49 
   50 #include <sys/mplock2.h>
   51 
   52 static void
   53 cvtstat(struct dfbsd12_stat *oldstat, struct stat *newstat)
   54 {
   55         bzero(oldstat, sizeof(*oldstat));
   56 
   57         oldstat->st_dev = newstat->st_dev;
   58         oldstat->st_ino = newstat->st_ino;      /* truncation */
   59         oldstat->st_mode = newstat->st_mode;
   60         oldstat->st_nlink = newstat->st_nlink;  /* truncation */
   61         oldstat->st_uid = newstat->st_uid;
   62         oldstat->st_gid = newstat->st_gid;
   63         oldstat->st_rdev = newstat->st_rdev;
   64         oldstat->st_atimespec = newstat->st_atimespec;
   65         oldstat->st_mtimespec = newstat->st_mtimespec;
   66         oldstat->st_ctimespec = newstat->st_ctimespec;
   67         oldstat->st_size = newstat->st_size;
   68         oldstat->st_blocks = newstat->st_blocks;
   69         oldstat->st_blksize = newstat->st_blksize;
   70         oldstat->st_flags = newstat->st_flags;
   71         oldstat->st_gen = newstat->st_gen;
   72 }
   73 
   74 /*
   75  * stat_args(char *path, struct dfbsd12_stat *ub)
   76  *
   77  * Get file status; this version follows links.
   78  *
   79  * MPALMOSTSAFE
   80  */
   81 int
   82 sys_dfbsd12_stat(struct dfbsd12_stat_args *uap)
   83 {
   84         struct nlookupdata nd;
   85         struct dfbsd12_stat ost;
   86         struct stat st;
   87         int error;
   88 
   89         get_mplock();
   90         error = nlookup_init(&nd, uap->path, UIO_USERSPACE, NLC_FOLLOW);
   91         if (error == 0) {
   92                 error = kern_stat(&nd, &st);
   93                 if (error == 0) {
   94                         cvtstat(&ost, &st);
   95                         error = copyout(&ost, uap->ub, sizeof(ost));
   96                 }
   97         }
   98         nlookup_done(&nd);
   99         rel_mplock();
  100         return (error);
  101 }
  102 
  103 /*
  104  * lstat_args(char *path, struct dfbsd12_stat *ub)
  105  *
  106  * Get file status; this version does not follow links.
  107  *
  108  * MPALMOSTSAFE
  109  */
  110 int
  111 sys_dfbsd12_lstat(struct dfbsd12_lstat_args *uap)
  112 {
  113         struct nlookupdata nd;
  114         struct dfbsd12_stat ost;
  115         struct stat st;
  116         int error;
  117 
  118         get_mplock();
  119         error = nlookup_init(&nd, uap->path, UIO_USERSPACE, 0);
  120         if (error == 0) {
  121                 error = kern_stat(&nd, &st);
  122                 if (error == 0) {
  123                         cvtstat(&ost, &st);
  124                         error = copyout(&ost, uap->ub, sizeof(ost));
  125                 }
  126         }
  127         nlookup_done(&nd);
  128         rel_mplock();
  129         return (error);
  130 }
  131 
  132 /*
  133  * fhstat_args(struct fhandle *u_fhp, struct dfbsd12_stat *sb)
  134  *
  135  * MPALMOSTSAFE
  136  */
  137 int
  138 sys_dfbsd12_fhstat(struct dfbsd12_fhstat_args *uap)
  139 {
  140         struct thread *td = curthread;
  141         struct dfbsd12_stat osb;
  142         struct stat sb;
  143         fhandle_t fh;
  144         struct mount *mp;
  145         struct vnode *vp;
  146         int error;
  147 
  148         /*
  149          * Must be super user
  150          */
  151         error = priv_check(td, PRIV_ROOT);
  152         if (error)
  153                 return (error);
  154         
  155         error = copyin(uap->u_fhp, &fh, sizeof(fhandle_t));
  156         if (error)
  157                 return (error);
  158 
  159         get_mplock();
  160         if ((mp = vfs_getvfs(&fh.fh_fsid)) == NULL) {
  161                 error = ESTALE;
  162                 goto done;
  163         }
  164         if ((error = VFS_FHTOVP(mp, NULL, &fh.fh_fid, &vp)))
  165                 goto done;
  166         error = vn_stat(vp, &sb, td->td_ucred);
  167         vput(vp);
  168         if (error)
  169                 goto done;
  170         cvtstat(&osb, &sb);
  171         error = copyout(&osb, uap->sb, sizeof(osb));
  172 done:
  173         rel_mplock();
  174         return (error);
  175 }
  176 
  177 /*
  178  * dfbsd12_fstat_args(int fd, struct dfbsd12_stat *sb)
  179  *
  180  * MPALMOSTSAFE
  181  */
  182 int
  183 sys_dfbsd12_fstat(struct dfbsd12_fstat_args *uap)
  184 {
  185         struct dfbsd12_stat ost;
  186         struct stat st;
  187         int error;
  188 
  189         get_mplock();
  190         error = kern_fstat(uap->fd, &st);
  191         rel_mplock();
  192 
  193         if (error == 0) {
  194                 cvtstat(&ost, &st);
  195                 error = copyout(&ost, uap->sb, sizeof(ost));
  196         }
  197         return (error);
  198 }

Cache object: 61ecbb502d4009c4557697e7c97db33f


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