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64c4757e | 1 | /* |
9a9dab36 | 2 | * mdadm - manage Linux "md" devices aka RAID arrays. |
64c4757e | 3 | * |
e736b623 | 4 | * Copyright (C) 2001-2009 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 | |
e736b623 | 22 | * Email: <neilb@suse.de> |
64c4757e NB |
23 | */ |
24 | ||
9a9dab36 | 25 | #include "mdadm.h" |
64c4757e | 26 | |
82b27616 NB |
27 | #define REGISTER_DEV _IO (MD_MAJOR, 1) |
28 | #define START_MD _IO (MD_MAJOR, 2) | |
29 | #define STOP_MD _IO (MD_MAJOR, 3) | |
30 | ||
a4e8316a N |
31 | int Build(char *mddev, struct mddev_dev *devlist, |
32 | struct shape *s, struct context *c) | |
64c4757e | 33 | { |
82b27616 NB |
34 | /* Build a linear or raid0 arrays without superblocks |
35 | * We cannot really do any checks, we just do it. | |
36 | * For md_version < 0.90.0, we call REGISTER_DEV | |
37 | * with the device numbers, and then | |
38 | * START_MD giving the "geometry" | |
39 | * geometry is 0xpp00cc | |
40 | * where pp is personality: 1==linear, 2=raid0 | |
41 | * cc = chunk size factor: 0==4k, 1==8k etc. | |
42 | * | |
43 | * For md_version >= 0.90.0 we call | |
44 | * SET_ARRAY_INFO, ADD_NEW_DISK, RUN_ARRAY | |
45 | * | |
46 | */ | |
47 | int i; | |
48 | int vers; | |
49 | struct stat stb; | |
98ce3849 | 50 | int subdevs = 0, missing_disks = 0; |
a655e550 | 51 | struct mddev_dev *dv; |
c82f047c | 52 | int bitmap_fd; |
f9c25f1d | 53 | unsigned long long bitmapsize; |
7f91af49 | 54 | int mdfd; |
a04d5763 N |
55 | char chosen_name[1024]; |
56 | int uuid[4] = {0,0,0,0}; | |
ad5bc697 | 57 | struct map_ent *map = NULL; |
82b27616 NB |
58 | |
59 | /* scan all devices, make sure they really are block devices */ | |
cd29a5c8 | 60 | for (dv = devlist; dv; dv=dv->next) { |
98ce3849 NB |
61 | subdevs++; |
62 | if (strcmp("missing", dv->devname) == 0) { | |
63 | missing_disks++; | |
64 | continue; | |
65 | } | |
cd29a5c8 | 66 | if (stat(dv->devname, &stb)) { |
e7b84f9d | 67 | pr_err("Cannot find %s: %s\n", |
cd29a5c8 | 68 | dv->devname, strerror(errno)); |
82b27616 NB |
69 | return 1; |
70 | } | |
71 | if ((stb.st_mode & S_IFMT) != S_IFBLK) { | |
e7b84f9d | 72 | pr_err("%s is not a block device.\n", |
cd29a5c8 | 73 | dv->devname); |
82b27616 NB |
74 | return 1; |
75 | } | |
cd29a5c8 NB |
76 | } |
77 | ||
a4e8316a | 78 | if (s->raiddisks != subdevs) { |
e7b84f9d | 79 | pr_err("requested %d devices in array but listed %d\n", |
a4e8316a | 80 | s->raiddisks, subdevs); |
cd29a5c8 | 81 | return 1; |
82b27616 NB |
82 | } |
83 | ||
a4e8316a N |
84 | if (s->layout == UnSet) |
85 | switch(s->level) { | |
b5e64645 | 86 | default: /* no layout */ |
a4e8316a | 87 | s->layout = 0; |
b5e64645 NB |
88 | break; |
89 | case 10: | |
a4e8316a | 90 | s->layout = 0x102; /* near=2, far=1 */ |
0c9e4afb | 91 | if (c->verbose > 0) |
e7b84f9d | 92 | pr_err("layout defaults to n1\n"); |
b5e64645 NB |
93 | break; |
94 | case 5: | |
95 | case 6: | |
a4e8316a | 96 | s->layout = map_name(r5layout, "default"); |
0c9e4afb | 97 | if (c->verbose > 0) |
a4e8316a | 98 | pr_err("layout defaults to %s\n", map_num(r5layout, s->layout)); |
b5e64645 NB |
99 | break; |
100 | case LEVEL_FAULTY: | |
a4e8316a | 101 | s->layout = map_name(faultylayout, "default"); |
b5e64645 | 102 | |
0c9e4afb | 103 | if (c->verbose > 0) |
a4e8316a | 104 | pr_err("layout defaults to %s\n", map_num(faultylayout, s->layout)); |
b5e64645 NB |
105 | break; |
106 | } | |
107 | ||
69207ff6 | 108 | /* We need to create the device. It can have no name. */ |
ad5bc697 | 109 | map_lock(&map); |
0c9e4afb | 110 | mdfd = create_mddev(mddev, NULL, c->autof, LOCAL, |
a04d5763 | 111 | chosen_name); |
ad5bc697 N |
112 | if (mdfd < 0) { |
113 | map_unlock(&map); | |
7f91af49 | 114 | return 1; |
ad5bc697 | 115 | } |
a714580e | 116 | mddev = chosen_name; |
b5e64645 | 117 | |
4dd2df09 | 118 | map_update(&map, fd2devnm(mdfd), "none", uuid, chosen_name); |
ad5bc697 | 119 | map_unlock(&map); |
a04d5763 | 120 | |
82b27616 | 121 | vers = md_get_version(mdfd); |
aba69144 | 122 | |
82b27616 | 123 | /* looks Ok, go for it */ |
cd29a5c8 | 124 | if (vers >= 9000) { |
82b27616 | 125 | mdu_array_info_t array; |
a4e8316a | 126 | array.level = s->level; |
0a8b92a6 N |
127 | if (s->size == MAX_SIZE) |
128 | s->size = 0; | |
129 | array.size = s->size; | |
a4e8316a N |
130 | array.nr_disks = s->raiddisks; |
131 | array.raid_disks = s->raiddisks; | |
82b27616 NB |
132 | array.md_minor = 0; |
133 | if (fstat(mdfd, &stb)==0) | |
0df46c2a | 134 | array.md_minor = minor(stb.st_rdev); |
cd29a5c8 | 135 | array.not_persistent = 1; |
82b27616 | 136 | array.state = 0; /* not clean, but no errors */ |
a4e8316a | 137 | if (s->assume_clean) |
dd0781e5 | 138 | array.state |= 1; |
a4e8316a N |
139 | array.active_disks = s->raiddisks - missing_disks; |
140 | array.working_disks = s->raiddisks - missing_disks; | |
82b27616 | 141 | array.spare_disks = 0; |
98ce3849 | 142 | array.failed_disks = missing_disks; |
a4e8316a N |
143 | if (s->chunk == 0 && (s->level==0 || s->level==LEVEL_LINEAR)) |
144 | s->chunk = 64; | |
145 | array.chunk_size = s->chunk*1024; | |
146 | array.layout = s->layout; | |
82b27616 | 147 | if (ioctl(mdfd, SET_ARRAY_INFO, &array)) { |
e7b84f9d | 148 | pr_err("SET_ARRAY_INFO failed for %s: %s\n", |
82b27616 | 149 | mddev, strerror(errno)); |
7f91af49 | 150 | goto abort; |
82b27616 | 151 | } |
a4e8316a | 152 | } else if (s->bitmap_file) { |
e7b84f9d | 153 | pr_err("bitmaps not supported with this kernel\n"); |
7f91af49 | 154 | goto abort; |
82b27616 | 155 | } |
5b28bd56 | 156 | |
a4e8316a | 157 | if (s->bitmap_file && s->level <= 0) { |
e7b84f9d | 158 | pr_err("bitmaps not meaningful with level %s\n", |
a4e8316a | 159 | map_num(pers, s->level)?:"given"); |
7f91af49 | 160 | goto abort; |
5b28bd56 | 161 | } |
82b27616 | 162 | /* now add the devices */ |
cd29a5c8 | 163 | for ((i=0), (dv = devlist) ; dv ; i++, dv=dv->next) { |
beae1dfe | 164 | unsigned long long dsize; |
fe80f49b | 165 | int fd; |
98ce3849 NB |
166 | if (strcmp("missing", dv->devname) == 0) |
167 | continue; | |
cd29a5c8 | 168 | if (stat(dv->devname, &stb)) { |
e7b84f9d | 169 | pr_err("Weird: %s has disappeared.\n", |
cd29a5c8 | 170 | dv->devname); |
82b27616 NB |
171 | goto abort; |
172 | } | |
cd29a5c8 | 173 | if ((stb.st_mode & S_IFMT)!= S_IFBLK) { |
dae45415 | 174 | pr_err("Weird: %s is no longer a block device.\n", |
cd29a5c8 | 175 | dv->devname); |
82b27616 NB |
176 | goto abort; |
177 | } | |
fe80f49b NB |
178 | fd = open(dv->devname, O_RDONLY|O_EXCL); |
179 | if (fd < 0) { | |
e7b84f9d | 180 | pr_err("Cannot open %s: %s\n", |
fe80f49b NB |
181 | dv->devname, strerror(errno)); |
182 | goto abort; | |
183 | } | |
beae1dfe | 184 | if (get_dev_size(fd, NULL, &dsize) && |
a4e8316a N |
185 | (s->size == 0 || s->size == MAX_SIZE || dsize < s->size)) |
186 | s->size = dsize; | |
fe80f49b | 187 | close(fd); |
25affb56 | 188 | if (vers >= 9000) { |
82b27616 NB |
189 | mdu_disk_info_t disk; |
190 | disk.number = i; | |
191 | disk.raid_disk = i; | |
dfd4d8ee | 192 | disk.state = (1<<MD_DISK_SYNC) | (1<<MD_DISK_ACTIVE); |
b3d31955 | 193 | if (dv->writemostly == 1) |
dfd4d8ee | 194 | disk.state |= 1<<MD_DISK_WRITEMOSTLY; |
0df46c2a NB |
195 | disk.major = major(stb.st_rdev); |
196 | disk.minor = minor(stb.st_rdev); | |
82b27616 | 197 | if (ioctl(mdfd, ADD_NEW_DISK, &disk)) { |
e7b84f9d | 198 | pr_err("ADD_NEW_DISK failed for %s: %s\n", |
cd29a5c8 | 199 | dv->devname, strerror(errno)); |
82b27616 NB |
200 | goto abort; |
201 | } | |
202 | } else { | |
203 | if (ioctl(mdfd, REGISTER_DEV, &stb.st_rdev)) { | |
e7b84f9d | 204 | pr_err("REGISTER_DEV failed for %s: %s.\n", |
cd29a5c8 | 205 | dv->devname, strerror(errno)); |
82b27616 NB |
206 | goto abort; |
207 | } | |
208 | } | |
209 | } | |
210 | /* now to start it */ | |
cd29a5c8 | 211 | if (vers >= 9000) { |
82b27616 | 212 | mdu_param_t param; /* not used by syscall */ |
a4e8316a N |
213 | if (s->bitmap_file) { |
214 | bitmap_fd = open(s->bitmap_file, O_RDWR); | |
c82f047c | 215 | if (bitmap_fd < 0) { |
dcec9ee5 | 216 | int major = BITMAP_MAJOR_HI; |
1bfdbe01 | 217 | #if 0 |
a4e8316a | 218 | if (s->bitmap_chunk == UnSet) { |
e7b84f9d | 219 | pr_err("%s cannot be openned.", |
a4e8316a | 220 | s->bitmap_file); |
7f91af49 | 221 | goto abort; |
c82f047c | 222 | } |
1bfdbe01 | 223 | #endif |
dcec9ee5 NB |
224 | if (vers < 9003) { |
225 | major = BITMAP_MAJOR_HOSTENDIAN; | |
226 | #ifdef __BIG_ENDIAN | |
e7b84f9d | 227 | pr_err("Warning - bitmaps created on this kernel are not portable\n" |
1bfdbe01 | 228 | " between different architectures. Consider upgrading the Linux kernel.\n"); |
dcec9ee5 NB |
229 | #endif |
230 | } | |
a4e8316a N |
231 | bitmapsize = s->size>>9; /* FIXME wrong for RAID10 */ |
232 | if (CreateBitmap(s->bitmap_file, 1, NULL, s->bitmap_chunk, | |
233 | c->delay, s->write_behind, bitmapsize, major)) { | |
7f91af49 | 234 | goto abort; |
c82f047c | 235 | } |
a4e8316a | 236 | bitmap_fd = open(s->bitmap_file, O_RDWR); |
c82f047c | 237 | if (bitmap_fd < 0) { |
e7b84f9d | 238 | pr_err("%s cannot be openned.", |
a4e8316a | 239 | s->bitmap_file); |
7f91af49 | 240 | goto abort; |
c82f047c | 241 | } |
aba69144 | 242 | } |
c82f047c NB |
243 | if (bitmap_fd >= 0) { |
244 | if (ioctl(mdfd, SET_BITMAP_FILE, bitmap_fd) < 0) { | |
e7b84f9d | 245 | pr_err("Cannot set bitmap file for %s: %s\n", |
c82f047c | 246 | mddev, strerror(errno)); |
7f91af49 | 247 | goto abort; |
c82f047c NB |
248 | } |
249 | } | |
250 | } | |
cd29a5c8 | 251 | if (ioctl(mdfd, RUN_ARRAY, ¶m)) { |
e7b84f9d | 252 | pr_err("RUN_ARRAY failed: %s\n", |
82b27616 | 253 | strerror(errno)); |
a4e8316a | 254 | if (s->chunk & (s->chunk-1)) { |
e7b84f9d N |
255 | cont_err("Problem may be that chunk size" |
256 | " is not a power of 2\n"); | |
a252c078 | 257 | } |
82b27616 NB |
258 | goto abort; |
259 | } | |
260 | } else { | |
cd29a5c8 | 261 | unsigned long arg; |
82b27616 | 262 | arg=0; |
a4e8316a | 263 | while (s->chunk > 4096) { |
82b27616 | 264 | arg++; |
a4e8316a | 265 | s->chunk >>= 1; |
82b27616 | 266 | } |
a4e8316a | 267 | if (s->level == 0) |
45c8bd99 N |
268 | arg |= 0x20000; |
269 | else | |
270 | arg |= 0x10000; | |
82b27616 | 271 | if (ioctl(mdfd, START_MD, arg)) { |
e7b84f9d | 272 | pr_err("START_MD failed: %s\n", |
82b27616 NB |
273 | strerror(errno)); |
274 | goto abort; | |
275 | } | |
276 | } | |
0c9e4afb | 277 | if (c->verbose >= 0) |
e7b84f9d | 278 | pr_err("array %s built and started.\n", |
dab6685f | 279 | mddev); |
a7c6e3fb | 280 | wait_for(mddev, mdfd); |
7f91af49 | 281 | close(mdfd); |
82b27616 NB |
282 | return 0; |
283 | ||
284 | abort: | |
cd29a5c8 | 285 | if (vers >= 9000) |
82b27616 NB |
286 | ioctl(mdfd, STOP_ARRAY, 0); |
287 | else | |
288 | ioctl(mdfd, STOP_MD, 0); | |
7f91af49 | 289 | close(mdfd); |
82b27616 | 290 | return 1; |
64c4757e | 291 | } |