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
  25 #if defined(LINUX) && defined(HAVE_FSID_INT)
  26 static int linux_statvfs(const char *path, vfs_statvfs_struct *statbuf)
  27 {
  28         struct statvfs statvfs_buf;
  29         int result;
  30
  31         result = statvfs(path, &statvfs_buf);
  32
  33         if (!result) {
  34                 statbuf->OptimalTransferSize = statvfs_buf.f_frsize;
  35                 statbuf->BlockSize = statvfs_buf.f_bsize;
  36                 statbuf->TotalBlocks = statvfs_buf.f_blocks;
  37                 statbuf->BlocksAvail = statvfs_buf.f_bfree;
  38                 statbuf->UserBlocksAvail = statvfs_buf.f_bavail;
  39                 statbuf->TotalFileNodes = statvfs_buf.f_files;
  40                 statbuf->FreeFileNodes = statvfs_buf.f_ffree;
  41                 statbuf->FsIdentifier = statvfs_buf.f_fsid;
  42
  43                 /* Good defaults for Linux filesystems are case sensitive
  44                  * and case preserving.
  45                  */
  46                 statbuf->FsCapabilities =
  47                     FILE_CASE_SENSITIVE_SEARCH | FILE_CASE_PRESERVED_NAMES;
  48         }
  49         return result;
  50 }
  51 #endif
  52
  53 #if defined(DARWINOS)
  54
  55 #include <sys/attr.h>
  56
  57 static int darwin_fs_capabilities(const char * path)
  58 {
  59         int caps = 0;
  60         vol_capabilities_attr_t *vcaps;
  61         struct attrlist attrlist;
  62         char attrbuf[sizeof(u_int32_t) + sizeof(vol_capabilities_attr_t)];
  63
  64 #define FORMAT_CAP(vinfo, cap) \
  65         ( ((vinfo)->valid[VOL_CAPABILITIES_FORMAT] & (cap)) && \
  66            ((vinfo)->capabilities[VOL_CAPABILITIES_FORMAT] & (cap)) )
  67
  68 #define INTERFACE_CAP(vinfo, cap) \
  69         ( ((vinfo)->valid[VOL_CAPABILITIES_INTERFACES] & (cap)) && \
  70            ((vinfo)->capabilities[VOL_CAPABILITIES_INTERFACES] & (cap)) )
  71
  72         ZERO_STRUCT(attrlist);
  73         attrlist.bitmapcount = ATTR_BIT_MAP_COUNT;
  74         attrlist.volattr = ATTR_VOL_CAPABILITIES;
  75
  76         if (getattrlist(path, &attrlist, attrbuf, sizeof(attrbuf), 0) != 0) {
  77                 DEBUG(0, ("getattrlist for %s capabilities failed: %s\n",
  78                             path, strerror(errno)));
  79                 /* Return no capabilities on failure. */
  80                 return 0;
  81         }
  82
  83         vcaps =
  84             (vol_capabilities_attr_t *)(attrbuf + sizeof(u_int32_t));
  85
  86         if (FORMAT_CAP(vcaps, VOL_CAP_FMT_SPARSE_FILES)) {
  87                 caps |= FILE_SUPPORTS_SPARSE_FILES;
  88         }
  89
  90         if (FORMAT_CAP(vcaps, VOL_CAP_FMT_CASE_SENSITIVE)) {
  91                 caps |= FILE_CASE_SENSITIVE_SEARCH;
  92         }
  93
  94         if (FORMAT_CAP(vcaps, VOL_CAP_FMT_CASE_PRESERVING)) {
  95                 caps |= FILE_CASE_PRESERVED_NAMES;
  96         }
  97
  98         if (INTERFACE_CAP(vcaps, VOL_CAP_INT_EXTENDED_SECURITY)) {
  99                 caps |= FILE_PERSISTENT_ACLS;
 100         }
 101
 102         return caps;
 103 }
 104
 105 static int darwin_statvfs(const char *path, vfs_statvfs_struct *statbuf)
 106 {
 107         struct statfs sbuf;
 108         int ret;
 109
 110         ret = statfs(path, &sbuf);
 111         if (ret != 0) {
 112                 return ret;
 113         }
 114
 115         statbuf->OptimalTransferSize = sbuf.f_iosize;
 116         statbuf->BlockSize = sbuf.f_bsize;
 117         statbuf->TotalBlocks = sbuf.f_blocks;
 118         statbuf->BlocksAvail = sbuf.f_bfree;
 119         statbuf->UserBlocksAvail = sbuf.f_bavail;
 120         statbuf->TotalFileNodes = sbuf.f_files;
 121         statbuf->FreeFileNodes = sbuf.f_ffree;
 122         statbuf->FsIdentifier = *(uint64_t *)(&sbuf.f_fsid); /* Ick. */
 123         statbuf->FsCapabilities = darwin_fs_capabilities(sbuf.f_mntonname);
 124
 125         return 0;
 126 }
 127 #endif
 128
 129 /*
 130  sys_statvfs() is an abstraction layer over system-dependent statvfs()/statfs()
 131  for particular POSIX systems. Due to controversy of what is considered more important
 132  between LSB and FreeBSD/POSIX.1 (IEEE Std 1003.1-2001) we need to abstract the interface
 133  so that particular OS would use its preffered interface.
 134 */
 135 int sys_statvfs(const char *path, vfs_statvfs_struct *statbuf)
 136 {
 137 #if defined(LINUX) && defined(HAVE_FSID_INT)
 138         return linux_statvfs(path, statbuf);
 139 #elif defined(DARWINOS)
 140         return darwin_statvfs(path, statbuf);
 141 #else
 142         /* BB change this to return invalid level */
 143 #ifdef EOPNOTSUPP
 144         return EOPNOTSUPP;
 145 #else
 146         return -1;
 147 #endif /* EOPNOTSUPP */
 148 #endif /* LINUX */
 149
 150 }