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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 | ||
7f91af49 | 31 | int Build(char *mddev, int chunk, int level, int layout, |
a655e550 | 32 | int raiddisks, struct mddev_dev *devlist, int assume_clean, |
7f91af49 | 33 | char *bitmap_file, int bitmap_chunk, int write_behind, |
83208785 | 34 | int delay, int verbose, int autof, unsigned long long size) |
64c4757e | 35 | { |
82b27616 NB |
36 | /* Build a linear or raid0 arrays without superblocks |
37 | * We cannot really do any checks, we just do it. | |
38 | * For md_version < 0.90.0, we call REGISTER_DEV | |
39 | * with the device numbers, and then | |
40 | * START_MD giving the "geometry" | |
41 | * geometry is 0xpp00cc | |
42 | * where pp is personality: 1==linear, 2=raid0 | |
43 | * cc = chunk size factor: 0==4k, 1==8k etc. | |
44 | * | |
45 | * For md_version >= 0.90.0 we call | |
46 | * SET_ARRAY_INFO, ADD_NEW_DISK, RUN_ARRAY | |
47 | * | |
48 | */ | |
49 | int i; | |
50 | int vers; | |
51 | struct stat stb; | |
98ce3849 | 52 | int subdevs = 0, missing_disks = 0; |
a655e550 | 53 | struct mddev_dev *dv; |
c82f047c | 54 | int bitmap_fd; |
f9c25f1d | 55 | unsigned long long bitmapsize; |
7f91af49 | 56 | int mdfd; |
a04d5763 N |
57 | char chosen_name[1024]; |
58 | int uuid[4] = {0,0,0,0}; | |
ad5bc697 | 59 | struct map_ent *map = NULL; |
82b27616 NB |
60 | |
61 | /* scan all devices, make sure they really are block devices */ | |
cd29a5c8 | 62 | for (dv = devlist; dv; dv=dv->next) { |
98ce3849 NB |
63 | subdevs++; |
64 | if (strcmp("missing", dv->devname) == 0) { | |
65 | missing_disks++; | |
66 | continue; | |
67 | } | |
cd29a5c8 | 68 | if (stat(dv->devname, &stb)) { |
e7b84f9d | 69 | pr_err("Cannot find %s: %s\n", |
cd29a5c8 | 70 | dv->devname, strerror(errno)); |
82b27616 NB |
71 | return 1; |
72 | } | |
73 | if ((stb.st_mode & S_IFMT) != S_IFBLK) { | |
e7b84f9d | 74 | pr_err("%s is not a block device.\n", |
cd29a5c8 | 75 | dv->devname); |
82b27616 NB |
76 | return 1; |
77 | } | |
cd29a5c8 NB |
78 | } |
79 | ||
80 | if (raiddisks != subdevs) { | |
e7b84f9d | 81 | pr_err("requested %d devices in array but listed %d\n", |
cd29a5c8 NB |
82 | raiddisks, subdevs); |
83 | return 1; | |
82b27616 NB |
84 | } |
85 | ||
b5e64645 NB |
86 | if (layout == UnSet) |
87 | switch(level) { | |
88 | default: /* no layout */ | |
89 | layout = 0; | |
90 | break; | |
91 | case 10: | |
92 | layout = 0x102; /* near=2, far=1 */ | |
dab6685f | 93 | if (verbose > 0) |
e7b84f9d | 94 | pr_err("layout defaults to n1\n"); |
b5e64645 NB |
95 | break; |
96 | case 5: | |
97 | case 6: | |
98 | layout = map_name(r5layout, "default"); | |
dab6685f | 99 | if (verbose > 0) |
e7b84f9d | 100 | pr_err("layout defaults to %s\n", map_num(r5layout, layout)); |
b5e64645 NB |
101 | break; |
102 | case LEVEL_FAULTY: | |
103 | layout = map_name(faultylayout, "default"); | |
104 | ||
dab6685f | 105 | if (verbose > 0) |
e7b84f9d | 106 | pr_err("layout defaults to %s\n", map_num(faultylayout, layout)); |
b5e64645 NB |
107 | break; |
108 | } | |
109 | ||
69207ff6 | 110 | /* We need to create the device. It can have no name. */ |
ad5bc697 | 111 | map_lock(&map); |
a04d5763 N |
112 | mdfd = create_mddev(mddev, NULL, autof, LOCAL, |
113 | chosen_name); | |
ad5bc697 N |
114 | if (mdfd < 0) { |
115 | map_unlock(&map); | |
7f91af49 | 116 | return 1; |
ad5bc697 | 117 | } |
a714580e | 118 | mddev = chosen_name; |
b5e64645 | 119 | |
ad5bc697 N |
120 | map_update(&map, fd2devnum(mdfd), "none", uuid, chosen_name); |
121 | map_unlock(&map); | |
a04d5763 | 122 | |
82b27616 | 123 | vers = md_get_version(mdfd); |
aba69144 | 124 | |
82b27616 | 125 | /* looks Ok, go for it */ |
cd29a5c8 | 126 | if (vers >= 9000) { |
82b27616 NB |
127 | mdu_array_info_t array; |
128 | array.level = level; | |
25affb56 | 129 | array.size = size; |
82b27616 NB |
130 | array.nr_disks = raiddisks; |
131 | array.raid_disks = raiddisks; | |
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 */ |
dd0781e5 NB |
137 | if (assume_clean) |
138 | array.state |= 1; | |
98ce3849 NB |
139 | array.active_disks = raiddisks - missing_disks; |
140 | array.working_disks = raiddisks - missing_disks; | |
82b27616 | 141 | array.spare_disks = 0; |
98ce3849 | 142 | array.failed_disks = missing_disks; |
699f9899 | 143 | if (chunk == 0 && (level==0 || level==LEVEL_LINEAR)) |
cd29a5c8 | 144 | chunk = 64; |
82b27616 | 145 | array.chunk_size = chunk*1024; |
b5e64645 | 146 | array.layout = 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 | } |
c82f047c | 152 | } else if (bitmap_file) { |
e7b84f9d | 153 | pr_err("bitmaps not supported with this kernel\n"); |
7f91af49 | 154 | goto abort; |
82b27616 | 155 | } |
5b28bd56 NB |
156 | |
157 | if (bitmap_file && level <= 0) { | |
e7b84f9d | 158 | pr_err("bitmaps not meaningful with level %s\n", |
5b28bd56 | 159 | map_num(pers, 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) { |
e7b84f9d | 174 | pr_err("Wierd: %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 NB |
184 | if (get_dev_size(fd, NULL, &dsize) && |
185 | (size == 0 || dsize < size)) | |
186 | 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 */ |
c82f047c NB |
213 | if (bitmap_file) { |
214 | bitmap_fd = open(bitmap_file, O_RDWR); | |
215 | if (bitmap_fd < 0) { | |
dcec9ee5 | 216 | int major = BITMAP_MAJOR_HI; |
1bfdbe01 | 217 | #if 0 |
c82f047c | 218 | if (bitmap_chunk == UnSet) { |
e7b84f9d | 219 | pr_err("%s cannot be openned.", |
c82f047c | 220 | 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 | } | |
f9c25f1d | 231 | bitmapsize = size>>9; /* FIXME wrong for RAID10 */ |
c82f047c | 232 | if (CreateBitmap(bitmap_file, 1, NULL, bitmap_chunk, |
f9c25f1d | 233 | delay, write_behind, bitmapsize, major)) { |
7f91af49 | 234 | goto abort; |
c82f047c NB |
235 | } |
236 | bitmap_fd = open(bitmap_file, O_RDWR); | |
237 | if (bitmap_fd < 0) { | |
e7b84f9d | 238 | pr_err("%s cannot be openned.", |
c82f047c | 239 | 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)); |
a252c078 | 254 | if (chunk & (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 NB |
262 | arg=0; |
263 | while (chunk > 4096) { | |
264 | arg++; | |
265 | chunk >>= 1; | |
266 | } | |
267 | if (level == 0) | |
268 | chunk |= 0x20000; | |
269 | else chunk |= 0x10000; | |
270 | if (ioctl(mdfd, START_MD, arg)) { | |
e7b84f9d | 271 | pr_err("START_MD failed: %s\n", |
82b27616 NB |
272 | strerror(errno)); |
273 | goto abort; | |
274 | } | |
275 | } | |
dab6685f | 276 | if (verbose >= 0) |
e7b84f9d | 277 | pr_err("array %s built and started.\n", |
dab6685f | 278 | mddev); |
a7c6e3fb | 279 | wait_for(mddev, mdfd); |
7f91af49 | 280 | close(mdfd); |
82b27616 NB |
281 | return 0; |
282 | ||
283 | abort: | |
cd29a5c8 | 284 | if (vers >= 9000) |
82b27616 NB |
285 | ioctl(mdfd, STOP_ARRAY, 0); |
286 | else | |
287 | ioctl(mdfd, STOP_MD, 0); | |
7f91af49 | 288 | close(mdfd); |
82b27616 | 289 | return 1; |
64c4757e | 290 | } |