source3/smbd/statvfs.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    VFS API's statvfs abstraction
   4    Copyright (C) Alexander Bokovoy                      2005
   5    Copyright (C) Steve French                           2005
   6    Copyright (C) James Peach                            2006
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23 #include "system/filesys.h"
  24 #include "smbd/smbd.h"
  25
  26 #if defined(LINUX) && defined(HAVE_FSID_INT)
  27 static int linux_statvfs(const char *path, vfs_statvfs_struct *statbuf)
  28 {
  29         struct statvfs statvfs_buf;
  30         int result;
  31
  32         result = statvfs(path, &statvfs_buf);
  33
  34         if (!result) {
  35                 statbuf->OptimalTransferSize = statvfs_buf.f_frsize;
  36                 statbuf->BlockSize = statvfs_buf.f_bsize;
  37                 statbuf->TotalBlocks = statvfs_buf.f_blocks;
  38                 statbuf->BlocksAvail = statvfs_buf.f_bfree;
  39                 statbuf->UserBlocksAvail = statvfs_buf.f_bavail;
  40                 statbuf->TotalFileNodes = statvfs_buf.f_files;
  41                 statbuf->FreeFileNodes = statvfs_buf.f_ffree;
  42                 statbuf->FsIdentifier = statvfs_buf.f_fsid;
  43
  44                 /* Good defaults for Linux filesystems are case sensitive
  45                  * and case preserving.
  46                  */
  47                 statbuf->FsCapabilities =
  48                     FILE_CASE_SENSITIVE_SEARCH | FILE_CASE_PRESERVED_NAMES;
  49         }
  50         return result;
  51 }
  52 #endif
  53
  54 #if defined(DARWINOS)
  55
  56 #include <sys/attr.h>
  57
  58 static int darwin_fs_capabilities(const char * path)
  59 {
  60         int caps = 0;
  61         vol_capabilities_attr_t *vcaps;
  62         struct attrlist attrlist;
  63         char attrbuf[sizeof(u_int32_t) + sizeof(vol_capabilities_attr_t)];
  64
  65 #define FORMAT_CAP(vinfo, cap) \
  66         ( ((vinfo)->valid[VOL_CAPABILITIES_FORMAT] & (cap)) && \
  67            ((vinfo)->capabilities[VOL_CAPABILITIES_FORMAT] & (cap)) )
  68
  69 #define INTERFACE_CAP(vinfo, cap) \
  70         ( ((vinfo)->valid[VOL_CAPABILITIES_INTERFACES] & (cap)) && \
  71            ((vinfo)->capabilities[VOL_CAPABILITIES_INTERFACES] & (cap)) )
  72
  73         ZERO_STRUCT(attrlist);
  74         attrlist.bitmapcount = ATTR_BIT_MAP_COUNT;
  75         attrlist.volattr = ATTR_VOL_CAPABILITIES;
  76
  77         if (getattrlist(path, &attrlist, attrbuf, sizeof(attrbuf), 0) != 0) {
  78                 DEBUG(0, ("getattrlist for %s capabilities failed: %s\n",
  79                             path, strerror(errno)));
  80                 /* Return no capabilities on failure. */
  81                 return 0;
  82         }
  83
  84         vcaps =
  85             (vol_capabilities_attr_t *)(attrbuf + sizeof(u_int32_t));
  86
  87         if (FORMAT_CAP(vcaps, VOL_CAP_FMT_SPARSE_FILES)) {
  88                 caps |= FILE_SUPPORTS_SPARSE_FILES;
  89         }
  90
  91         if (FORMAT_CAP(vcaps, VOL_CAP_FMT_CASE_SENSITIVE)) {
  92                 caps |= FILE_CASE_SENSITIVE_SEARCH;
  93         }
  94
  95         if (FORMAT_CAP(vcaps, VOL_CAP_FMT_CASE_PRESERVING)) {
  96                 caps |= FILE_CASE_PRESERVED_NAMES;
  97         }
  98
  99         if (INTERFACE_CAP(vcaps, VOL_CAP_INT_EXTENDED_SECURITY)) {
 100                 caps |= FILE_PERSISTENT_ACLS;
 101         }
 102
 103         return caps;
 104 }
 105
 106 static int darwin_statvfs(const char *path, vfs_statvfs_struct *statbuf)
 107 {
 108         struct statfs sbuf;
 109         int ret;
 110
 111         ret = statfs(path, &sbuf);
 112         if (ret != 0) {
 113                 return ret;
 114         }
 115
 116         statbuf->OptimalTransferSize = sbuf.f_iosize;
 117         statbuf->BlockSize = sbuf.f_bsize;
 118         statbuf->TotalBlocks = sbuf.f_blocks;
 119         statbuf->BlocksAvail = sbuf.f_bfree;
 120         statbuf->UserBlocksAvail = sbuf.f_bavail;
 121         statbuf->TotalFileNodes = sbuf.f_files;
 122         statbuf->FreeFileNodes = sbuf.f_ffree;
 123         statbuf->FsIdentifier = *(uint64_t *)(&sbuf.f_fsid); /* Ick. */
 124         statbuf->FsCapabilities = darwin_fs_capabilities(sbuf.f_mntonname);
 125
 126         return 0;
 127 }
 128 #endif
 129
 130 /*
 131  sys_statvfs() is an abstraction layer over system-dependent statvfs()/statfs()
 132  for particular POSIX systems. Due to controversy of what is considered more important
 133  between LSB and FreeBSD/POSIX.1 (IEEE Std 1003.1-2001) we need to abstract the interface
 134  so that particular OS would use its preffered interface.
 135 */
 136 int sys_statvfs(const char *path, vfs_statvfs_struct *statbuf)
 137 {
 138 #if defined(LINUX) && defined(HAVE_FSID_INT)
 139         return linux_statvfs(path, statbuf);
 140 #elif defined(DARWINOS)
 141         return darwin_statvfs(path, statbuf);
 142 #else
 143         /* BB change this to return invalid level */
 144 #ifdef EOPNOTSUPP
 145         return EOPNOTSUPP;
 146 #else
 147         return -1;
 148 #endif /* EOPNOTSUPP */
 149 #endif /* LINUX */
 150
 151 }