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-rw-r--r--source3/smbd/statvfs.c182
1 files changed, 182 insertions, 0 deletions
diff --git a/source3/smbd/statvfs.c b/source3/smbd/statvfs.c
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+++ b/source3/smbd/statvfs.c
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+/*
+ Unix SMB/CIFS implementation.
+ VFS API's statvfs abstraction
+ Copyright (C) Alexander Bokovoy 2005
+ Copyright (C) Steve French 2005
+ Copyright (C) James Peach 2006
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "includes.h"
+#include "system/filesys.h"
+#include "smbd/smbd.h"
+
+#if defined(DARWINOS)
+#include <sys/attr.h>
+
+static int darwin_fs_capabilities(const char * path)
+{
+ int caps = 0;
+ vol_capabilities_attr_t *vcaps;
+ struct attrlist attrlist;
+ char attrbuf[sizeof(u_int32_t) + sizeof(vol_capabilities_attr_t)];
+
+#define FORMAT_CAP(vinfo, cap) \
+ ( ((vinfo)->valid[VOL_CAPABILITIES_FORMAT] & (cap)) && \
+ ((vinfo)->capabilities[VOL_CAPABILITIES_FORMAT] & (cap)) )
+
+#define INTERFACE_CAP(vinfo, cap) \
+ ( ((vinfo)->valid[VOL_CAPABILITIES_INTERFACES] & (cap)) && \
+ ((vinfo)->capabilities[VOL_CAPABILITIES_INTERFACES] & (cap)) )
+
+ ZERO_STRUCT(attrlist);
+ attrlist.bitmapcount = ATTR_BIT_MAP_COUNT;
+ attrlist.volattr = ATTR_VOL_CAPABILITIES;
+
+ if (getattrlist(path, &attrlist, attrbuf, sizeof(attrbuf), 0) != 0) {
+ DEBUG(0, ("getattrlist for %s capabilities failed: %s\n",
+ path, strerror(errno)));
+ /* Return no capabilities on failure. */
+ return 0;
+ }
+
+ vcaps =
+ (vol_capabilities_attr_t *)(attrbuf + sizeof(u_int32_t));
+
+ if (FORMAT_CAP(vcaps, VOL_CAP_FMT_SPARSE_FILES)) {
+ caps |= FILE_SUPPORTS_SPARSE_FILES;
+ }
+
+ if (FORMAT_CAP(vcaps, VOL_CAP_FMT_CASE_SENSITIVE)) {
+ caps |= FILE_CASE_SENSITIVE_SEARCH;
+ }
+
+ if (FORMAT_CAP(vcaps, VOL_CAP_FMT_CASE_PRESERVING)) {
+ caps |= FILE_CASE_PRESERVED_NAMES;
+ }
+
+ if (INTERFACE_CAP(vcaps, VOL_CAP_INT_EXTENDED_SECURITY)) {
+ caps |= FILE_PERSISTENT_ACLS;
+ }
+
+ return caps;
+}
+#endif /* DARWINOS */
+
+#if defined(BSD_STYLE_STATVFS)
+static int bsd_statvfs(const char *path, struct vfs_statvfs_struct *statbuf)
+{
+ struct statfs sbuf;
+ int ret;
+
+ ret = statfs(path, &sbuf);
+ if (ret == 0) {
+ statbuf->OptimalTransferSize = sbuf.f_iosize;
+ statbuf->BlockSize = sbuf.f_bsize;
+ statbuf->TotalBlocks = sbuf.f_blocks;
+ statbuf->BlocksAvail = sbuf.f_bfree;
+ statbuf->UserBlocksAvail = sbuf.f_bavail;
+ statbuf->TotalFileNodes = sbuf.f_files;
+ statbuf->FreeFileNodes = sbuf.f_ffree;
+ statbuf->FsIdentifier =
+ (((uint64_t) sbuf.f_fsid.val[0] << 32) & 0xffffffff00000000LL) |
+ (uint64_t) sbuf.f_fsid.val[1];
+#ifdef DARWINOS
+ statbuf->FsCapabilities = darwin_fs_capabilities(sbuf.f_mntonname);
+#else
+ /* Try to extrapolate some of the fs flags into the
+ * capabilities
+ */
+ statbuf->FsCapabilities =
+ FILE_CASE_SENSITIVE_SEARCH | FILE_CASE_PRESERVED_NAMES;
+#ifdef MNT_ACLS
+ if (sbuf.f_flags & MNT_ACLS)
+ statbuf->FsCapabilities |= FILE_PERSISTENT_ACLS;
+#endif
+#endif
+ if (sbuf.f_flags & MNT_QUOTA)
+ statbuf->FsCapabilities |= FILE_VOLUME_QUOTAS;
+ if (sbuf.f_flags & MNT_RDONLY)
+ statbuf->FsCapabilities |= FILE_READ_ONLY_VOLUME;
+ }
+
+ return ret;
+}
+#elif defined(STAT_STATVFS) && defined(HAVE_FSID_INT)
+static int posix_statvfs(const char *path, struct vfs_statvfs_struct *statbuf)
+{
+ struct statvfs statvfs_buf;
+ int result;
+
+ result = statvfs(path, &statvfs_buf);
+
+ if (!result) {
+ /* statvfs bsize is not the statfs bsize, the naming is terrible,
+ * see bug 11810 */
+ statbuf->OptimalTransferSize = statvfs_buf.f_bsize;
+ statbuf->BlockSize = statvfs_buf.f_frsize;
+ statbuf->TotalBlocks = statvfs_buf.f_blocks;
+ statbuf->BlocksAvail = statvfs_buf.f_bfree;
+ statbuf->UserBlocksAvail = statvfs_buf.f_bavail;
+ statbuf->TotalFileNodes = statvfs_buf.f_files;
+ statbuf->FreeFileNodes = statvfs_buf.f_ffree;
+ statbuf->FsIdentifier = statvfs_buf.f_fsid;
+ /* Try to extrapolate some of the fs flags into the
+ * capabilities
+ */
+ statbuf->FsCapabilities =
+ FILE_CASE_SENSITIVE_SEARCH | FILE_CASE_PRESERVED_NAMES;
+#ifdef ST_QUOTA
+ if (statvfs_buf.f_flag & ST_QUOTA)
+ statbuf->FsCapabilities |= FILE_VOLUME_QUOTAS;
+#endif
+ if (statvfs_buf.f_flag & ST_RDONLY)
+ statbuf->FsCapabilities |= FILE_READ_ONLY_VOLUME;
+
+#if defined(HAVE_FALLOC_FL_PUNCH_HOLE) && defined(HAVE_LSEEK_HOLE_DATA)
+ /*
+ * Only flag sparse file support if ZERO_DATA can be used to
+ * deallocate blocks, and SEEK_HOLE / SEEK_DATA can be used
+ * to provide QUERY_ALLOCATED_RANGES information.
+ */
+ statbuf->FsCapabilities |= FILE_SUPPORTS_SPARSE_FILES;
+#endif
+ }
+ return result;
+}
+#endif
+
+/*
+ sys_statvfs() is an abstraction layer over system-dependent statvfs()/statfs()
+ for particular POSIX systems. Due to controversy of what is considered more important
+ between LSB and FreeBSD/POSIX.1 (IEEE Std 1003.1-2001) we need to abstract the interface
+ so that particular OS would use its preferred interface.
+*/
+int sys_statvfs(const char *path, struct vfs_statvfs_struct *statbuf)
+{
+#if defined(BSD_STYLE_STATVFS)
+ return bsd_statvfs(path, statbuf);
+#elif defined(STAT_STATVFS) && defined(HAVE_FSID_INT)
+ return posix_statvfs(path, statbuf);
+#else
+ /* BB change this to return invalid level */
+#ifdef EOPNOTSUPP
+ return EOPNOTSUPP;
+#else
+ return -1;
+#endif /* EOPNOTSUPP */
+#endif /* LINUX */
+
+}