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Commit | Line | Data |
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64c4757e | 1 | /* |
9a9dab36 | 2 | * mdadm - manage Linux "md" devices aka RAID arrays. |
64c4757e | 3 | * |
4f589ad0 | 4 | * Copyright (C) 2001-2006 Neil Brown <neilb@suse.de> |
64c4757e NB |
5 | * |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | * | |
21 | * Author: Neil Brown | |
22 | * Email: <neilb@cse.unsw.edu.au> | |
23 | * Paper: Neil Brown | |
24 | * School of Computer Science and Engineering | |
25 | * The University of New South Wales | |
26 | * Sydney, 2052 | |
27 | * Australia | |
28 | */ | |
29 | ||
9a9dab36 | 30 | #include "mdadm.h" |
64c4757e | 31 | |
82b27616 NB |
32 | #define REGISTER_DEV _IO (MD_MAJOR, 1) |
33 | #define START_MD _IO (MD_MAJOR, 2) | |
34 | #define STOP_MD _IO (MD_MAJOR, 3) | |
35 | ||
7f91af49 N |
36 | int Build(char *mddev, int chunk, int level, int layout, |
37 | int raiddisks, mddev_dev_t devlist, int assume_clean, | |
38 | char *bitmap_file, int bitmap_chunk, int write_behind, | |
39 | int delay, int verbose, int autof) | |
64c4757e | 40 | { |
82b27616 NB |
41 | /* Build a linear or raid0 arrays without superblocks |
42 | * We cannot really do any checks, we just do it. | |
43 | * For md_version < 0.90.0, we call REGISTER_DEV | |
44 | * with the device numbers, and then | |
45 | * START_MD giving the "geometry" | |
46 | * geometry is 0xpp00cc | |
47 | * where pp is personality: 1==linear, 2=raid0 | |
48 | * cc = chunk size factor: 0==4k, 1==8k etc. | |
49 | * | |
50 | * For md_version >= 0.90.0 we call | |
51 | * SET_ARRAY_INFO, ADD_NEW_DISK, RUN_ARRAY | |
52 | * | |
53 | */ | |
54 | int i; | |
55 | int vers; | |
56 | struct stat stb; | |
98ce3849 | 57 | int subdevs = 0, missing_disks = 0; |
cd29a5c8 | 58 | mddev_dev_t dv; |
c82f047c | 59 | int bitmap_fd; |
fe80f49b | 60 | unsigned long long size = ~0ULL; |
f9c25f1d | 61 | unsigned long long bitmapsize; |
7f91af49 | 62 | int mdfd; |
82b27616 NB |
63 | |
64 | /* scan all devices, make sure they really are block devices */ | |
cd29a5c8 | 65 | for (dv = devlist; dv; dv=dv->next) { |
98ce3849 NB |
66 | subdevs++; |
67 | if (strcmp("missing", dv->devname) == 0) { | |
68 | missing_disks++; | |
69 | continue; | |
70 | } | |
cd29a5c8 | 71 | if (stat(dv->devname, &stb)) { |
82b27616 | 72 | fprintf(stderr, Name ": Cannot find %s: %s\n", |
cd29a5c8 | 73 | dv->devname, strerror(errno)); |
82b27616 NB |
74 | return 1; |
75 | } | |
76 | if ((stb.st_mode & S_IFMT) != S_IFBLK) { | |
77 | fprintf(stderr, Name ": %s is not a block device.\n", | |
cd29a5c8 | 78 | dv->devname); |
82b27616 NB |
79 | return 1; |
80 | } | |
cd29a5c8 NB |
81 | } |
82 | ||
83 | if (raiddisks != subdevs) { | |
84 | fprintf(stderr, Name ": requested %d devices in array but listed %d\n", | |
85 | raiddisks, subdevs); | |
86 | return 1; | |
82b27616 NB |
87 | } |
88 | ||
b5e64645 NB |
89 | if (layout == UnSet) |
90 | switch(level) { | |
91 | default: /* no layout */ | |
92 | layout = 0; | |
93 | break; | |
94 | case 10: | |
95 | layout = 0x102; /* near=2, far=1 */ | |
dab6685f | 96 | if (verbose > 0) |
b5e64645 NB |
97 | fprintf(stderr, |
98 | Name ": layout defaults to n1\n"); | |
99 | break; | |
100 | case 5: | |
101 | case 6: | |
102 | layout = map_name(r5layout, "default"); | |
dab6685f | 103 | if (verbose > 0) |
b5e64645 NB |
104 | fprintf(stderr, |
105 | Name ": layout defaults to %s\n", map_num(r5layout, layout)); | |
106 | break; | |
107 | case LEVEL_FAULTY: | |
108 | layout = map_name(faultylayout, "default"); | |
109 | ||
dab6685f | 110 | if (verbose > 0) |
b5e64645 NB |
111 | fprintf(stderr, |
112 | Name ": layout defaults to %s\n", map_num(faultylayout, layout)); | |
113 | break; | |
114 | } | |
115 | ||
7f91af49 N |
116 | /* We need to create the device */ |
117 | mdfd = create_mddev(mddev, autof); | |
118 | if (mdfd < 0) | |
119 | return 1; | |
b5e64645 | 120 | |
82b27616 | 121 | vers = md_get_version(mdfd); |
aba69144 | 122 | |
82b27616 | 123 | /* looks Ok, go for it */ |
cd29a5c8 | 124 | if (vers >= 9000) { |
82b27616 NB |
125 | mdu_array_info_t array; |
126 | array.level = level; | |
127 | array.size = 0; | |
128 | array.nr_disks = raiddisks; | |
129 | array.raid_disks = raiddisks; | |
130 | array.md_minor = 0; | |
131 | if (fstat(mdfd, &stb)==0) | |
0df46c2a | 132 | array.md_minor = minor(stb.st_rdev); |
cd29a5c8 | 133 | array.not_persistent = 1; |
82b27616 | 134 | array.state = 0; /* not clean, but no errors */ |
dd0781e5 NB |
135 | if (assume_clean) |
136 | array.state |= 1; | |
98ce3849 NB |
137 | array.active_disks = raiddisks - missing_disks; |
138 | array.working_disks = raiddisks - missing_disks; | |
82b27616 | 139 | array.spare_disks = 0; |
98ce3849 | 140 | array.failed_disks = missing_disks; |
699f9899 | 141 | if (chunk == 0 && (level==0 || level==LEVEL_LINEAR)) |
cd29a5c8 | 142 | chunk = 64; |
82b27616 | 143 | array.chunk_size = chunk*1024; |
b5e64645 | 144 | array.layout = layout; |
82b27616 NB |
145 | if (ioctl(mdfd, SET_ARRAY_INFO, &array)) { |
146 | fprintf(stderr, Name ": SET_ARRAY_INFO failed for %s: %s\n", | |
147 | mddev, strerror(errno)); | |
7f91af49 | 148 | goto abort; |
82b27616 | 149 | } |
c82f047c NB |
150 | } else if (bitmap_file) { |
151 | fprintf(stderr, Name ": bitmaps not supported with this kernel\n"); | |
7f91af49 | 152 | goto abort; |
82b27616 | 153 | } |
5b28bd56 NB |
154 | |
155 | if (bitmap_file && level <= 0) { | |
156 | fprintf(stderr, Name ": bitmaps not meaningful with level %s\n", | |
157 | map_num(pers, level)?:"given"); | |
7f91af49 | 158 | goto abort; |
5b28bd56 | 159 | } |
82b27616 | 160 | /* now add the devices */ |
cd29a5c8 | 161 | for ((i=0), (dv = devlist) ; dv ; i++, dv=dv->next) { |
beae1dfe | 162 | unsigned long long dsize; |
fe80f49b | 163 | int fd; |
98ce3849 NB |
164 | if (strcmp("missing", dv->devname) == 0) |
165 | continue; | |
cd29a5c8 | 166 | if (stat(dv->devname, &stb)) { |
98ce3849 | 167 | fprintf(stderr, Name ": Weird: %s has disappeared.\n", |
cd29a5c8 | 168 | dv->devname); |
82b27616 NB |
169 | goto abort; |
170 | } | |
cd29a5c8 | 171 | if ((stb.st_mode & S_IFMT)!= S_IFBLK) { |
82b27616 | 172 | fprintf(stderr, Name ": Wierd: %s is no longer a block device.\n", |
cd29a5c8 | 173 | dv->devname); |
82b27616 NB |
174 | goto abort; |
175 | } | |
fe80f49b NB |
176 | fd = open(dv->devname, O_RDONLY|O_EXCL); |
177 | if (fd < 0) { | |
aba69144 | 178 | fprintf(stderr, Name ": Cannot open %s: %s\n", |
fe80f49b NB |
179 | dv->devname, strerror(errno)); |
180 | goto abort; | |
181 | } | |
beae1dfe NB |
182 | if (get_dev_size(fd, NULL, &dsize) && |
183 | (size == 0 || dsize < size)) | |
184 | size = dsize; | |
fe80f49b | 185 | close(fd); |
cd29a5c8 | 186 | if (vers>= 9000) { |
82b27616 NB |
187 | mdu_disk_info_t disk; |
188 | disk.number = i; | |
189 | disk.raid_disk = i; | |
dfd4d8ee | 190 | disk.state = (1<<MD_DISK_SYNC) | (1<<MD_DISK_ACTIVE); |
b3d31955 | 191 | if (dv->writemostly == 1) |
dfd4d8ee | 192 | disk.state |= 1<<MD_DISK_WRITEMOSTLY; |
0df46c2a NB |
193 | disk.major = major(stb.st_rdev); |
194 | disk.minor = minor(stb.st_rdev); | |
82b27616 NB |
195 | if (ioctl(mdfd, ADD_NEW_DISK, &disk)) { |
196 | fprintf(stderr, Name ": ADD_NEW_DISK failed for %s: %s\n", | |
cd29a5c8 | 197 | dv->devname, strerror(errno)); |
82b27616 NB |
198 | goto abort; |
199 | } | |
200 | } else { | |
201 | if (ioctl(mdfd, REGISTER_DEV, &stb.st_rdev)) { | |
e0d19036 | 202 | fprintf(stderr, Name ": REGISTER_DEV failed for %s: %s.\n", |
cd29a5c8 | 203 | dv->devname, strerror(errno)); |
82b27616 NB |
204 | goto abort; |
205 | } | |
206 | } | |
207 | } | |
208 | /* now to start it */ | |
cd29a5c8 | 209 | if (vers >= 9000) { |
82b27616 | 210 | mdu_param_t param; /* not used by syscall */ |
c82f047c NB |
211 | if (bitmap_file) { |
212 | bitmap_fd = open(bitmap_file, O_RDWR); | |
213 | if (bitmap_fd < 0) { | |
dcec9ee5 | 214 | int major = BITMAP_MAJOR_HI; |
1bfdbe01 | 215 | #if 0 |
c82f047c NB |
216 | if (bitmap_chunk == UnSet) { |
217 | fprintf(stderr, Name ": %s cannot be openned.", | |
218 | bitmap_file); | |
7f91af49 | 219 | goto abort; |
c82f047c | 220 | } |
1bfdbe01 | 221 | #endif |
dcec9ee5 NB |
222 | if (vers < 9003) { |
223 | major = BITMAP_MAJOR_HOSTENDIAN; | |
224 | #ifdef __BIG_ENDIAN | |
225 | fprintf(stderr, Name ": Warning - bitmaps created on this kernel are not portable\n" | |
1bfdbe01 | 226 | " between different architectures. Consider upgrading the Linux kernel.\n"); |
dcec9ee5 NB |
227 | #endif |
228 | } | |
f9c25f1d | 229 | bitmapsize = size>>9; /* FIXME wrong for RAID10 */ |
c82f047c | 230 | if (CreateBitmap(bitmap_file, 1, NULL, bitmap_chunk, |
f9c25f1d | 231 | delay, write_behind, bitmapsize, major)) { |
7f91af49 | 232 | goto abort; |
c82f047c NB |
233 | } |
234 | bitmap_fd = open(bitmap_file, O_RDWR); | |
235 | if (bitmap_fd < 0) { | |
236 | fprintf(stderr, Name ": %s cannot be openned.", | |
237 | bitmap_file); | |
7f91af49 | 238 | goto abort; |
c82f047c | 239 | } |
aba69144 | 240 | } |
c82f047c NB |
241 | if (bitmap_fd >= 0) { |
242 | if (ioctl(mdfd, SET_BITMAP_FILE, bitmap_fd) < 0) { | |
243 | fprintf(stderr, Name ": Cannot set bitmap file for %s: %s\n", | |
244 | mddev, strerror(errno)); | |
7f91af49 | 245 | goto abort; |
c82f047c NB |
246 | } |
247 | } | |
248 | } | |
cd29a5c8 | 249 | if (ioctl(mdfd, RUN_ARRAY, ¶m)) { |
82b27616 NB |
250 | fprintf(stderr, Name ": RUN_ARRAY failed: %s\n", |
251 | strerror(errno)); | |
252 | goto abort; | |
253 | } | |
254 | } else { | |
cd29a5c8 | 255 | unsigned long arg; |
82b27616 NB |
256 | arg=0; |
257 | while (chunk > 4096) { | |
258 | arg++; | |
259 | chunk >>= 1; | |
260 | } | |
261 | if (level == 0) | |
262 | chunk |= 0x20000; | |
263 | else chunk |= 0x10000; | |
264 | if (ioctl(mdfd, START_MD, arg)) { | |
265 | fprintf(stderr, Name ": START_MD failed: %s\n", | |
266 | strerror(errno)); | |
267 | goto abort; | |
268 | } | |
269 | } | |
dab6685f NB |
270 | if (verbose >= 0) |
271 | fprintf(stderr, Name ": array %s built and started.\n", | |
272 | mddev); | |
7f91af49 | 273 | close(mdfd); |
82b27616 NB |
274 | return 0; |
275 | ||
276 | abort: | |
cd29a5c8 | 277 | if (vers >= 9000) |
82b27616 NB |
278 | ioctl(mdfd, STOP_ARRAY, 0); |
279 | else | |
280 | ioctl(mdfd, STOP_MD, 0); | |
7f91af49 | 281 | close(mdfd); |
82b27616 | 282 | return 1; |
64c4757e | 283 | } |