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(DARWINOS)
  27
  28 #include <sys/attr.h>
  29
  30 static int darwin_fs_capabilities(const char * path)
  31 {
  32         int caps = 0;
  33         vol_capabilities_attr_t *vcaps;
  34         struct attrlist attrlist;
  35         char attrbuf[sizeof(u_int32_t) + sizeof(vol_capabilities_attr_t)];
  36
  37 #define FORMAT_CAP(vinfo, cap) \
  38         ( ((vinfo)->valid[VOL_CAPABILITIES_FORMAT] & (cap)) && \
  39            ((vinfo)->capabilities[VOL_CAPABILITIES_FORMAT] & (cap)) )
  40
  41 #define INTERFACE_CAP(vinfo, cap) \
  42         ( ((vinfo)->valid[VOL_CAPABILITIES_INTERFACES] & (cap)) && \
  43            ((vinfo)->capabilities[VOL_CAPABILITIES_INTERFACES] & (cap)) )
  44
  45         ZERO_STRUCT(attrlist);
  46         attrlist.bitmapcount = ATTR_BIT_MAP_COUNT;
  47         attrlist.volattr = ATTR_VOL_CAPABILITIES;
  48
  49         if (getattrlist(path, &attrlist, attrbuf, sizeof(attrbuf), 0) != 0) {
  50                 DEBUG(0, ("getattrlist for %s capabilities failed: %s\n",
  51                             path, strerror(errno)));
  52                 /* Return no capabilities on failure. */
  53                 return 0;
  54         }
  55
  56         vcaps =
  57             (vol_capabilities_attr_t *)(attrbuf + sizeof(u_int32_t));
  58
  59         if (FORMAT_CAP(vcaps, VOL_CAP_FMT_SPARSE_FILES)) {
  60                 caps |= FILE_SUPPORTS_SPARSE_FILES;
  61         }
  62
  63         if (FORMAT_CAP(vcaps, VOL_CAP_FMT_CASE_SENSITIVE)) {
  64                 caps |= FILE_CASE_SENSITIVE_SEARCH;
  65         }
  66
  67         if (FORMAT_CAP(vcaps, VOL_CAP_FMT_CASE_PRESERVING)) {
  68                 caps |= FILE_CASE_PRESERVED_NAMES;
  69         }
  70
  71         if (INTERFACE_CAP(vcaps, VOL_CAP_INT_EXTENDED_SECURITY)) {
  72                 caps |= FILE_PERSISTENT_ACLS;
  73         }
  74
  75         return caps;
  76 }
  77
  78 static int darwin_statvfs(const char *path, vfs_statvfs_struct *statbuf)
  79 {
  80         struct statfs sbuf;
  81         int ret;
  82
  83         ret = statfs(path, &sbuf);
  84         if (ret != 0) {
  85                 return ret;
  86         }
  87
  88         statbuf->OptimalTransferSize = sbuf.f_iosize;
  89         statbuf->BlockSize = sbuf.f_bsize;
  90         statbuf->TotalBlocks = sbuf.f_blocks;
  91         statbuf->BlocksAvail = sbuf.f_bfree;
  92         statbuf->UserBlocksAvail = sbuf.f_bavail;
  93         statbuf->TotalFileNodes = sbuf.f_files;
  94         statbuf->FreeFileNodes = sbuf.f_ffree;
  95         statbuf->FsIdentifier = *(uint64_t *)(&sbuf.f_fsid); /* Ick. */
  96         statbuf->FsCapabilities = darwin_fs_capabilities(sbuf.f_mntonname);
  97
  98         return 0;
  99 }
 100 #elif defined(BSD) && defined(BSD_STATVFS_BSIZE)
 101 static int bsd_statvfs(const char *path, vfs_statvfs_struct *statbuf)
 102 {
 103         struct statfs statfs_buf;
 104         int result;
 105
 106         result = statfs(path, &statfs_buf);
 107         if (result != 0) {
 108                 return result;
 109         }
 110
 111         statbuf->OptimalTransferSize = statfs_buf.f_iosize;
 112         statbuf->BlockSize = statfs_buf.f_bsize;
 113         statbuf->TotalBlocks = statfs_buf.f_blocks;
 114         statbuf->BlocksAvail = statfs_buf.f_bfree;
 115         statbuf->UserBlocksAvail = statfs_buf.f_bavail;
 116         statbuf->TotalFileNodes = statfs_buf.f_files;
 117         statbuf->FreeFileNodes = statfs_buf.f_ffree;
 118         statbuf->FsIdentifier =
 119                 (((uint64_t) statfs_buf.f_fsid.val[0] << 32) & 0xffffffff00000000LL) |
 120                     (uint64_t) statfs_buf.f_fsid.val[1];
 121         /* Try to extrapolate some of the fs flags into the
 122          * capabilities
 123          */
 124         statbuf->FsCapabilities =
 125             FILE_CASE_SENSITIVE_SEARCH | FILE_CASE_PRESERVED_NAMES;
 126 #ifdef MNT_ACLS
 127         if (statfs_buf.f_flags & MNT_ACLS)
 128                 statbuf->FsCapabilities |= FILE_PERSISTENT_ACLS;
 129 #endif
 130         if (statfs_buf.f_flags & MNT_QUOTA)
 131                 statbuf->FsCapabilities |= FILE_VOLUME_QUOTAS;
 132         if (statfs_buf.f_flags & MNT_RDONLY)
 133                 statbuf->FsCapabilities |= FILE_READ_ONLY_VOLUME;
 134
 135         return 0;
 136 }
 137 #elif defined(STAT_STATVFS) && defined(HAVE_FSID_INT)
 138 static int linux_statvfs(const char *path, vfs_statvfs_struct *statbuf)
 139 {
 140         struct statvfs statvfs_buf;
 141         int result;
 142
 143         result = statvfs(path, &statvfs_buf);
 144
 145         if (!result) {
 146                 statbuf->OptimalTransferSize = statvfs_buf.f_frsize;
 147                 statbuf->BlockSize = statvfs_buf.f_bsize;
 148                 statbuf->TotalBlocks = statvfs_buf.f_blocks;
 149                 statbuf->BlocksAvail = statvfs_buf.f_bfree;
 150                 statbuf->UserBlocksAvail = statvfs_buf.f_bavail;
 151                 statbuf->TotalFileNodes = statvfs_buf.f_files;
 152                 statbuf->FreeFileNodes = statvfs_buf.f_ffree;
 153                 statbuf->FsIdentifier = statvfs_buf.f_fsid;
 154
 155                 /* Good defaults for Linux filesystems are case sensitive
 156                  * and case preserving.
 157                  */
 158                 statbuf->FsCapabilities =
 159                     FILE_CASE_SENSITIVE_SEARCH | FILE_CASE_PRESERVED_NAMES;
 160         }
 161         return result;
 162 }
 163 #endif
 164
 165 /*
 166  sys_statvfs() is an abstraction layer over system-dependent statvfs()/statfs()
 167  for particular POSIX systems. Due to controversy of what is considered more important
 168  between LSB and FreeBSD/POSIX.1 (IEEE Std 1003.1-2001) we need to abstract the interface
 169  so that particular OS would use its prefered interface.
 170 */
 171 int sys_statvfs(const char *path, vfs_statvfs_struct *statbuf)
 172 {
 173 #if defined(DARWINOS)
 174         return darwin_statvfs(path, statbuf);
 175 #elif defined(BSD) && defined(BSD_STATVFS_BSIZE)
 176         return bsd_statvfs(path, statbuf);
 177 #elif defined(STAT_STATVFS) && defined(HAVE_FSID_INT)
 178         return linux_statvfs(path, statbuf);
 179 #else
 180         /* BB change this to return invalid level */
 181 #ifdef EOPNOTSUPP
 182         return EOPNOTSUPP;
 183 #else
 184         return -1;
 185 #endif /* EOPNOTSUPP */
 186 #endif /* LINUX */
 187
 188 }