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
  24 #if defined(LINUX) && defined(HAVE_FSID_INT)
  25 static int linux_statvfs(const char *path, vfs_statvfs_struct *statbuf)
  26 {
  27         struct statvfs statvfs_buf;
  28         int result;
  29
  30         result = statvfs(path, &statvfs_buf);
  31
  32         if (!result) {
  33                 statbuf->OptimalTransferSize = statvfs_buf.f_frsize;
  34                 statbuf->BlockSize = statvfs_buf.f_bsize;
  35                 statbuf->TotalBlocks = statvfs_buf.f_blocks;
  36                 statbuf->BlocksAvail = statvfs_buf.f_bfree;
  37                 statbuf->UserBlocksAvail = statvfs_buf.f_bavail;
  38                 statbuf->TotalFileNodes = statvfs_buf.f_files;
  39                 statbuf->FreeFileNodes = statvfs_buf.f_ffree;
  40                 statbuf->FsIdentifier = statvfs_buf.f_fsid;
  41
  42                 /* Good defaults for Linux filesystems are case sensitive
  43                  * and case preserving.
  44                  */
  45                 statbuf->FsCapabilities =
  46                     FILE_CASE_SENSITIVE_SEARCH | FILE_CASE_PRESERVED_NAMES;
  47         }
  48         return result;
  49 }
  50 #endif
  51
  52 #if defined(DARWINOS)
  53
  54 #include <sys/attr.h>
  55
  56 static int darwin_fs_capabilities(const char * path)
  57 {
  58         int caps = 0;
  59         vol_capabilities_attr_t *vcaps;
  60         struct attrlist attrlist;
  61         char attrbuf[sizeof(u_int32_t) + sizeof(vol_capabilities_attr_t)];
  62
  63 #define FORMAT_CAP(vinfo, cap) \
  64         ( ((vinfo)->valid[VOL_CAPABILITIES_FORMAT] & (cap)) && \
  65            ((vinfo)->capabilities[VOL_CAPABILITIES_FORMAT] & (cap)) )
  66
  67 #define INTERFACE_CAP(vinfo, cap) \
  68         ( ((vinfo)->valid[VOL_CAPABILITIES_INTERFACES] & (cap)) && \
  69            ((vinfo)->capabilities[VOL_CAPABILITIES_INTERFACES] & (cap)) )
  70
  71         ZERO_STRUCT(attrlist);
  72         attrlist.bitmapcount = ATTR_BIT_MAP_COUNT;
  73         attrlist.volattr = ATTR_VOL_CAPABILITIES;
  74
  75         if (getattrlist(path, &attrlist, attrbuf, sizeof(attrbuf), 0) != 0) {
  76                 DEBUG(0, ("getattrlist for %s capabilities failed: %s\n",
  77                             path, strerror(errno)));
  78                 /* Return no capabilities on failure. */
  79                 return 0;
  80         }
  81
  82         vcaps =
  83             (vol_capabilities_attr_t *)(attrbuf + sizeof(u_int32_t));
  84
  85         if (FORMAT_CAP(vcaps, VOL_CAP_FMT_SPARSE_FILES)) {
  86                 caps |= FILE_SUPPORTS_SPARSE_FILES;
  87         }
  88
  89         if (FORMAT_CAP(vcaps, VOL_CAP_FMT_CASE_SENSITIVE)) {
  90                 caps |= FILE_CASE_SENSITIVE_SEARCH;
  91         }
  92
  93         if (FORMAT_CAP(vcaps, VOL_CAP_FMT_CASE_PRESERVING)) {
  94                 caps |= FILE_CASE_PRESERVED_NAMES;
  95         }
  96
  97         if (INTERFACE_CAP(vcaps, VOL_CAP_INT_EXTENDED_SECURITY)) {
  98                 caps |= FILE_PERSISTENT_ACLS;
  99         }
 100
 101         return caps;
 102 }
 103
 104 static int darwin_statvfs(const char *path, vfs_statvfs_struct *statbuf)
 105 {
 106         struct statfs sbuf;
 107         int ret;
 108
 109         ret = statfs(path, &sbuf);
 110         if (ret != 0) {
 111                 return ret;
 112         }
 113
 114         statbuf->OptimalTransferSize = sbuf.f_iosize;
 115         statbuf->BlockSize = sbuf.f_bsize;
 116         statbuf->TotalBlocks = sbuf.f_blocks;
 117         statbuf->BlocksAvail = sbuf.f_bfree;
 118         statbuf->UserBlocksAvail = sbuf.f_bavail;
 119         statbuf->TotalFileNodes = sbuf.f_files;
 120         statbuf->FreeFileNodes = sbuf.f_ffree;
 121         statbuf->FsIdentifier = *(uint64_t *)(&sbuf.f_fsid); /* Ick. */
 122         statbuf->FsCapabilities = darwin_fs_capabilities(sbuf.f_mntonname);
 123
 124         return 0;
 125 }
 126 #endif
 127
 128 /*
 129  sys_statvfs() is an abstraction layer over system-dependent statvfs()/statfs()
 130  for particular POSIX systems. Due to controversy of what is considered more important
 131  between LSB and FreeBSD/POSIX.1 (IEEE Std 1003.1-2001) we need to abstract the interface
 132  so that particular OS would use its preffered interface.
 133 */
 134 int sys_statvfs(const char *path, vfs_statvfs_struct *statbuf)
 135 {
 136 #if defined(LINUX) && defined(HAVE_FSID_INT)
 137         return linux_statvfs(path, statbuf);
 138 #elif defined(DARWINOS)
 139         return darwin_statvfs(path, statbuf);
 140 #else
 141         /* BB change this to return invalid level */
 142 #ifdef EOPNOTSUPP
 143         return EOPNOTSUPP;
 144 #else
 145         return -1;
 146 #endif /* EOPNOTSUPP */
 147 #endif /* LINUX */
 148
 149 }