source: trunk/server/source4/ntvfs/posix/pvfs_fsinfo.c

Last change on this file was 745, checked in by Silvan Scherrer, 13 years ago

Samba Server: updated trunk to 3.6.0
File size: 6.3 KB
Line 
1/*
2 Unix SMB/CIFS implementation.
3
4 POSIX NTVFS backend - fsinfo
5
6 Copyright (C) Andrew Tridgell 2004
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 "vfs_posix.h"
24#include "librpc/gen_ndr/xattr.h"
25#include "librpc/ndr/libndr.h"
26
27/* We use libblkid out of e2fsprogs to identify UUID of a volume */
28#ifdef HAVE_LIBBLKID
29#include <blkid/blkid.h>
30#endif
31
32static NTSTATUS pvfs_blkid_fs_uuid(struct pvfs_state *pvfs, struct stat *st, struct GUID *uuid)
33{
34#ifdef HAVE_LIBBLKID
35 NTSTATUS status;
36 char *uuid_value = NULL;
37 char *devname = NULL;
38
39 devname = blkid_devno_to_devname(st->st_dev);
40 if (!devname) {
41 ZERO_STRUCTP(uuid);
42 return NT_STATUS_OK;
43 }
44
45 uuid_value = blkid_get_tag_value(NULL, "UUID", devname);
46 free(devname);
47 if (!uuid_value) {
48 ZERO_STRUCTP(uuid);
49 return NT_STATUS_OK;
50 }
51
52 status = GUID_from_string(uuid_value, uuid);
53 free(uuid_value);
54 if (!NT_STATUS_IS_OK(status)) {
55 ZERO_STRUCTP(uuid);
56 return NT_STATUS_OK;
57 }
58 return NT_STATUS_OK;
59#else
60 ZERO_STRUCTP(uuid);
61 return NT_STATUS_OK;
62#endif
63}
64
65static NTSTATUS pvfs_cache_base_fs_uuid(struct pvfs_state *pvfs, struct stat *st)
66{
67 NTSTATUS status;
68 struct GUID uuid;
69
70 if (pvfs->base_fs_uuid) return NT_STATUS_OK;
71
72 status = pvfs_blkid_fs_uuid(pvfs, st, &uuid);
73 NT_STATUS_NOT_OK_RETURN(status);
74
75 pvfs->base_fs_uuid = talloc(pvfs, struct GUID);
76 NT_STATUS_HAVE_NO_MEMORY(pvfs->base_fs_uuid);
77 *pvfs->base_fs_uuid = uuid;
78
79 return NT_STATUS_OK;
80}
81/*
82 return filesystem space info
83*/
84NTSTATUS pvfs_fsinfo(struct ntvfs_module_context *ntvfs,
85 struct ntvfs_request *req, union smb_fsinfo *fs)
86{
87 NTSTATUS status;
88 struct pvfs_state *pvfs = talloc_get_type(ntvfs->private_data,
89 struct pvfs_state);
90 uint64_t blocks_free, blocks_total;
91 unsigned int bpunit;
92 struct stat st;
93 const uint16_t block_size = 512;
94
95 /* only some levels need the expensive sys_fsusage() call */
96 switch (fs->generic.level) {
97 case RAW_QFS_DSKATTR:
98 case RAW_QFS_ALLOCATION:
99 case RAW_QFS_SIZE_INFO:
100 case RAW_QFS_SIZE_INFORMATION:
101 case RAW_QFS_FULL_SIZE_INFORMATION:
102 if (sys_fsusage(pvfs->base_directory, &blocks_free, &blocks_total) == -1) {
103 return pvfs_map_errno(pvfs, errno);
104 }
105 default:
106 break;
107 }
108
109 if (stat(pvfs->base_directory, &st) != 0) {
110 return NT_STATUS_DISK_CORRUPT_ERROR;
111 }
112
113 /* now fill in the out fields */
114 switch (fs->generic.level) {
115 case RAW_QFS_GENERIC:
116 return NT_STATUS_INVALID_LEVEL;
117
118 case RAW_QFS_DSKATTR:
119 /* we need to scale the sizes to fit */
120 for (bpunit=64; bpunit<0x10000; bpunit *= 2) {
121 if (blocks_total * (double)block_size < bpunit * 512 * 65535.0) {
122 break;
123 }
124 }
125 fs->dskattr.out.blocks_per_unit = bpunit;
126 fs->dskattr.out.block_size = block_size;
127 fs->dskattr.out.units_total = (blocks_total * (double)block_size) / (bpunit * 512);
128 fs->dskattr.out.units_free = (blocks_free * (double)block_size) / (bpunit * 512);
129
130 /* we must return a maximum of 2G to old DOS systems, or they get very confused */
131 if (bpunit > 64 && req->ctx->protocol <= PROTOCOL_LANMAN2) {
132 fs->dskattr.out.blocks_per_unit = 64;
133 fs->dskattr.out.units_total = 0xFFFF;
134 fs->dskattr.out.units_free = 0xFFFF;
135 }
136 return NT_STATUS_OK;
137
138 case RAW_QFS_ALLOCATION:
139 fs->allocation.out.fs_id = st.st_dev;
140 fs->allocation.out.total_alloc_units = blocks_total;
141 fs->allocation.out.avail_alloc_units = blocks_free;
142 fs->allocation.out.sectors_per_unit = 1;
143 fs->allocation.out.bytes_per_sector = block_size;
144 return NT_STATUS_OK;
145
146 case RAW_QFS_VOLUME:
147 fs->volume.out.serial_number = st.st_ino;
148 fs->volume.out.volume_name.s = pvfs->share_name;
149 return NT_STATUS_OK;
150
151 case RAW_QFS_VOLUME_INFO:
152 case RAW_QFS_VOLUME_INFORMATION:
153 unix_to_nt_time(&fs->volume_info.out.create_time, st.st_ctime);
154 fs->volume_info.out.serial_number = st.st_ino;
155 fs->volume_info.out.volume_name.s = pvfs->share_name;
156 return NT_STATUS_OK;
157
158 case RAW_QFS_SIZE_INFO:
159 case RAW_QFS_SIZE_INFORMATION:
160 fs->size_info.out.total_alloc_units = blocks_total;
161 fs->size_info.out.avail_alloc_units = blocks_free;
162 fs->size_info.out.sectors_per_unit = 1;
163 fs->size_info.out.bytes_per_sector = block_size;
164 return NT_STATUS_OK;
165
166 case RAW_QFS_DEVICE_INFO:
167 case RAW_QFS_DEVICE_INFORMATION:
168 fs->device_info.out.device_type = 0;
169 fs->device_info.out.characteristics = 0;
170 return NT_STATUS_OK;
171
172 case RAW_QFS_ATTRIBUTE_INFO:
173 case RAW_QFS_ATTRIBUTE_INFORMATION:
174 fs->attribute_info.out.fs_attr = pvfs->fs_attribs;
175 fs->attribute_info.out.max_file_component_length = 255;
176 fs->attribute_info.out.fs_type.s = ntvfs->ctx->fs_type;
177 return NT_STATUS_OK;
178
179 case RAW_QFS_QUOTA_INFORMATION:
180 ZERO_STRUCT(fs->quota_information.out.unknown);
181 fs->quota_information.out.quota_soft = 0;
182 fs->quota_information.out.quota_hard = 0;
183 fs->quota_information.out.quota_flags = 0;
184 return NT_STATUS_OK;
185
186 case RAW_QFS_FULL_SIZE_INFORMATION:
187 fs->full_size_information.out.total_alloc_units = blocks_total;
188 fs->full_size_information.out.call_avail_alloc_units = blocks_free;
189 fs->full_size_information.out.actual_avail_alloc_units = blocks_free;
190 fs->full_size_information.out.sectors_per_unit = 1;
191 fs->full_size_information.out.bytes_per_sector = block_size;
192 return NT_STATUS_OK;
193
194 case RAW_QFS_OBJECTID_INFORMATION:
195 ZERO_STRUCT(fs->objectid_information.out.guid);
196 ZERO_STRUCT(fs->objectid_information.out.unknown);
197
198 status = pvfs_cache_base_fs_uuid(pvfs, &st);
199 NT_STATUS_NOT_OK_RETURN(status);
200
201 fs->objectid_information.out.guid = *pvfs->base_fs_uuid;
202 return NT_STATUS_OK;
203
204 default:
205 break;
206 }
207 return NT_STATUS_INVALID_LEVEL;
208}
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