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/*
Unix SMB/CIFS implementation.
POSIX NTVFS backend - fsinfo
Copyright (C) Andrew Tridgell 2004
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 "vfs_posix.h"
#include "librpc/gen_ndr/xattr.h"
#include "librpc/ndr/libndr.h"
/* We use libblkid out of e2fsprogs to identify UUID of a volume */
#ifdef HAVE_LIBBLKID
#include <blkid/blkid.h>
#endif
static NTSTATUS pvfs_blkid_fs_uuid(struct pvfs_state *pvfs, struct stat *st, struct GUID *uuid)
{
#ifdef HAVE_LIBBLKID
NTSTATUS status;
char *uuid_value = NULL;
char *devname = NULL;
devname = blkid_devno_to_devname(st->st_dev);
if (!devname) {
ZERO_STRUCTP(uuid);
return NT_STATUS_OK;
}
uuid_value = blkid_get_tag_value(NULL, "UUID", devname);
free(devname);
if (!uuid_value) {
ZERO_STRUCTP(uuid);
return NT_STATUS_OK;
}
status = GUID_from_string(uuid_value, uuid);
free(uuid_value);
if (!NT_STATUS_IS_OK(status)) {
ZERO_STRUCTP(uuid);
return NT_STATUS_OK;
}
return NT_STATUS_OK;
#else
ZERO_STRUCTP(uuid);
return NT_STATUS_OK;
#endif
}
static NTSTATUS pvfs_cache_base_fs_uuid(struct pvfs_state *pvfs, struct stat *st)
{
NTSTATUS status;
struct GUID uuid;
if (pvfs->base_fs_uuid) return NT_STATUS_OK;
status = pvfs_blkid_fs_uuid(pvfs, st, &uuid);
NT_STATUS_NOT_OK_RETURN(status);
pvfs->base_fs_uuid = talloc(pvfs, struct GUID);
NT_STATUS_HAVE_NO_MEMORY(pvfs->base_fs_uuid);
*pvfs->base_fs_uuid = uuid;
return NT_STATUS_OK;
}
/*
return filesystem space info
*/
NTSTATUS pvfs_fsinfo(struct ntvfs_module_context *ntvfs,
struct ntvfs_request *req, union smb_fsinfo *fs)
{
NTSTATUS status;
struct pvfs_state *pvfs = talloc_get_type(ntvfs->private_data,
struct pvfs_state);
uint64_t blocks_free, blocks_total;
unsigned int bpunit;
struct stat st;
const uint16_t block_size = 512;
/* only some levels need the expensive sys_fsusage() call */
switch (fs->generic.level) {
case RAW_QFS_DSKATTR:
case RAW_QFS_ALLOCATION:
case RAW_QFS_SIZE_INFO:
case RAW_QFS_SIZE_INFORMATION:
case RAW_QFS_FULL_SIZE_INFORMATION:
if (sys_fsusage(pvfs->base_directory, &blocks_free, &blocks_total) == -1) {
return pvfs_map_errno(pvfs, errno);
}
default:
break;
}
if (stat(pvfs->base_directory, &st) != 0) {
return NT_STATUS_DISK_CORRUPT_ERROR;
}
/* now fill in the out fields */
switch (fs->generic.level) {
case RAW_QFS_GENERIC:
return NT_STATUS_INVALID_LEVEL;
case RAW_QFS_DSKATTR:
/* we need to scale the sizes to fit */
for (bpunit=64; bpunit<0x10000; bpunit *= 2) {
if (blocks_total * (double)block_size < bpunit * 512 * 65535.0) {
break;
}
}
fs->dskattr.out.blocks_per_unit = bpunit;
fs->dskattr.out.block_size = block_size;
fs->dskattr.out.units_total = (blocks_total * (double)block_size) / (bpunit * 512);
fs->dskattr.out.units_free = (blocks_free * (double)block_size) / (bpunit * 512);
/* we must return a maximum of 2G to old DOS systems, or they get very confused */
if (bpunit > 64 && req->ctx->protocol <= PROTOCOL_LANMAN2) {
fs->dskattr.out.blocks_per_unit = 64;
fs->dskattr.out.units_total = 0xFFFF;
fs->dskattr.out.units_free = 0xFFFF;
}
return NT_STATUS_OK;
case RAW_QFS_ALLOCATION:
fs->allocation.out.fs_id = st.st_dev;
fs->allocation.out.total_alloc_units = blocks_total;
fs->allocation.out.avail_alloc_units = blocks_free;
fs->allocation.out.sectors_per_unit = 1;
fs->allocation.out.bytes_per_sector = block_size;
return NT_STATUS_OK;
case RAW_QFS_VOLUME:
fs->volume.out.serial_number = st.st_ino;
fs->volume.out.volume_name.s = pvfs->share_name;
return NT_STATUS_OK;
case RAW_QFS_VOLUME_INFO:
case RAW_QFS_VOLUME_INFORMATION:
unix_to_nt_time(&fs->volume_info.out.create_time, st.st_ctime);
fs->volume_info.out.serial_number = st.st_ino;
fs->volume_info.out.volume_name.s = pvfs->share_name;
return NT_STATUS_OK;
case RAW_QFS_SIZE_INFO:
case RAW_QFS_SIZE_INFORMATION:
fs->size_info.out.total_alloc_units = blocks_total;
fs->size_info.out.avail_alloc_units = blocks_free;
fs->size_info.out.sectors_per_unit = 1;
fs->size_info.out.bytes_per_sector = block_size;
return NT_STATUS_OK;
case RAW_QFS_DEVICE_INFO:
case RAW_QFS_DEVICE_INFORMATION:
fs->device_info.out.device_type = 0;
fs->device_info.out.characteristics = 0;
return NT_STATUS_OK;
case RAW_QFS_ATTRIBUTE_INFO:
case RAW_QFS_ATTRIBUTE_INFORMATION:
fs->attribute_info.out.fs_attr = pvfs->fs_attribs;
fs->attribute_info.out.max_file_component_length = 255;
fs->attribute_info.out.fs_type.s = ntvfs->ctx->fs_type;
return NT_STATUS_OK;
case RAW_QFS_QUOTA_INFORMATION:
ZERO_STRUCT(fs->quota_information.out.unknown);
fs->quota_information.out.quota_soft = 0;
fs->quota_information.out.quota_hard = 0;
fs->quota_information.out.quota_flags = 0;
return NT_STATUS_OK;
case RAW_QFS_FULL_SIZE_INFORMATION:
fs->full_size_information.out.total_alloc_units = blocks_total;
fs->full_size_information.out.call_avail_alloc_units = blocks_free;
fs->full_size_information.out.actual_avail_alloc_units = blocks_free;
fs->full_size_information.out.sectors_per_unit = 1;
fs->full_size_information.out.bytes_per_sector = block_size;
return NT_STATUS_OK;
case RAW_QFS_OBJECTID_INFORMATION:
ZERO_STRUCT(fs->objectid_information.out.guid);
ZERO_STRUCT(fs->objectid_information.out.unknown);
status = pvfs_cache_base_fs_uuid(pvfs, &st);
NT_STATUS_NOT_OK_RETURN(status);
fs->objectid_information.out.guid = *pvfs->base_fs_uuid;
return NT_STATUS_OK;
default:
break;
}
return NT_STATUS_INVALID_LEVEL;
}
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