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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" |
682c7051 NB |
31 | #include "md_u.h" |
32 | #include "md_p.h" | |
64c4757e | 33 | |
82b27616 NB |
34 | #define REGISTER_DEV _IO (MD_MAJOR, 1) |
35 | #define START_MD _IO (MD_MAJOR, 2) | |
36 | #define STOP_MD _IO (MD_MAJOR, 3) | |
37 | ||
64c4757e NB |
38 | int Manage_ro(char *devname, int fd, int readonly) |
39 | { | |
682c7051 NB |
40 | /* switch to readonly or rw |
41 | * | |
42 | * requires >= 0.90.0 | |
43 | * first check that array is runing | |
44 | * use RESTART_ARRAY_RW or STOP_ARRAY_RO | |
45 | * | |
46 | */ | |
47 | mdu_array_info_t array; | |
48 | ||
49 | if (md_get_version(fd) < 9000) { | |
50 | fprintf(stderr, Name ": need md driver version 0.90.0 or later\n"); | |
51 | return 1; | |
52 | } | |
53 | if (ioctl(fd, GET_ARRAY_INFO, &array)) { | |
54 | fprintf(stderr, Name ": %s does not appear to be active.\n", | |
55 | devname); | |
56 | return 1; | |
57 | } | |
58 | ||
59 | if (readonly>0) { | |
60 | if (ioctl(fd, STOP_ARRAY_RO, NULL)) { | |
61 | fprintf(stderr, Name ": failed to set readonly for %s: %s\n", | |
62 | devname, strerror(errno)); | |
63 | return 1; | |
64 | } | |
65 | } else if (readonly < 0) { | |
66 | if (ioctl(fd, RESTART_ARRAY_RW, NULL)) { | |
82b27616 | 67 | fprintf(stderr, Name ": failed to set writable for %s: %s\n", |
682c7051 NB |
68 | devname, strerror(errno)); |
69 | return 1; | |
70 | } | |
71 | } | |
72 | return 0; | |
64c4757e NB |
73 | } |
74 | ||
91f068bf | 75 | int Manage_runstop(char *devname, int fd, int runstop, int quiet) |
64c4757e | 76 | { |
682c7051 NB |
77 | /* Run or stop the array. array must already be configured |
78 | * required >= 0.90.0 | |
79 | */ | |
682c7051 | 80 | mdu_param_t param; /* unused */ |
82b27616 NB |
81 | |
82 | if (runstop == -1 && md_get_version(fd) < 9000) { | |
83 | if (ioctl(fd, STOP_MD, 0)) { | |
91f068bf NB |
84 | if (!quiet) fprintf(stderr, Name ": stopping device %s failed: %s\n", |
85 | devname, strerror(errno)); | |
82b27616 NB |
86 | return 1; |
87 | } | |
88 | } | |
682c7051 NB |
89 | |
90 | if (md_get_version(fd) < 9000) { | |
91 | fprintf(stderr, Name ": need md driver version 0.90.0 or later\n"); | |
92 | return 1; | |
93 | } | |
82b27616 | 94 | /* |
682c7051 NB |
95 | if (ioctl(fd, GET_ARRAY_INFO, &array)) { |
96 | fprintf(stderr, Name ": %s does not appear to be active.\n", | |
97 | devname); | |
98 | return 1; | |
99 | } | |
82b27616 | 100 | */ |
682c7051 NB |
101 | if (runstop>0) { |
102 | if (ioctl(fd, RUN_ARRAY, ¶m)) { | |
103 | fprintf(stderr, Name ": failed to run array %s: %s\n", | |
104 | devname, strerror(errno)); | |
105 | return 1; | |
106 | } | |
107 | } else if (runstop < 0){ | |
108 | if (ioctl(fd, STOP_ARRAY, NULL)) { | |
ab56093f | 109 | if (quiet==0) |
91f068bf NB |
110 | fprintf(stderr, Name ": fail to stop array %s: %s\n", |
111 | devname, strerror(errno)); | |
682c7051 NB |
112 | return 1; |
113 | } | |
ab56093f NB |
114 | if (quiet <= 0) |
115 | fprintf(stderr, Name ": stopped %s\n", devname); | |
682c7051 NB |
116 | } |
117 | return 0; | |
64c4757e NB |
118 | } |
119 | ||
dd0781e5 NB |
120 | int Manage_resize(char *devname, int fd, long long size, int raid_disks) |
121 | { | |
122 | mdu_array_info_t info; | |
123 | if (ioctl(fd, GET_ARRAY_INFO, &info) != 0) { | |
124 | fprintf(stderr, Name ": Cannot get array information for %s: %s\n", | |
125 | devname, strerror(errno)); | |
126 | return 1; | |
127 | } | |
128 | if (size >= 0) | |
129 | info.size = size; | |
130 | if (raid_disks > 0) | |
131 | info.raid_disks = raid_disks; | |
132 | if (ioctl(fd, SET_ARRAY_INFO, &info) != 0) { | |
133 | fprintf(stderr, Name ": Cannot set device size/shape for %s: %s\n", | |
134 | devname, strerror(errno)); | |
135 | return 1; | |
136 | } | |
137 | return 0; | |
138 | } | |
139 | ||
b5e64645 NB |
140 | int Manage_reconfig(char *devname, int fd, int layout) |
141 | { | |
142 | mdu_array_info_t info; | |
143 | if (ioctl(fd, GET_ARRAY_INFO, &info) != 0) { | |
144 | fprintf(stderr, Name ": Cannot get array information for %s: %s\n", | |
145 | devname, strerror(errno)); | |
146 | return 1; | |
147 | } | |
148 | info.layout = layout; | |
149 | printf("layout set to %d\n", info.layout); | |
150 | if (ioctl(fd, SET_ARRAY_INFO, &info) != 0) { | |
151 | fprintf(stderr, Name ": Cannot set layout for %s: %s\n", | |
152 | devname, strerror(errno)); | |
153 | return 1; | |
154 | } | |
155 | return 0; | |
156 | } | |
dd0781e5 | 157 | |
64c4757e | 158 | int Manage_subdevs(char *devname, int fd, |
dab6685f | 159 | mddev_dev_t devlist, int verbose) |
cd29a5c8 | 160 | { |
682c7051 NB |
161 | /* do something to each dev. |
162 | * devmode can be | |
163 | * 'a' - add the device | |
164 | * try HOT_ADD_DISK | |
165 | * If that fails EINVAL, try ADD_NEW_DISK | |
166 | * 'r' - remove the device HOT_REMOVE_DISK | |
167 | * 'f' - set the device faulty SET_DISK_FAULTY | |
168 | */ | |
169 | mdu_array_info_t array; | |
170 | mdu_disk_info_t disc; | |
cd29a5c8 | 171 | mddev_dev_t dv; |
682c7051 | 172 | struct stat stb; |
c913b90e | 173 | int j; |
0fbf459d | 174 | int tfd; |
892debc8 NB |
175 | struct supertype *st; |
176 | void *dsuper = NULL; | |
fe80f49b NB |
177 | void *osuper = NULL; /* original super */ |
178 | int duuid[4]; | |
179 | int ouuid[4]; | |
682c7051 NB |
180 | |
181 | if (ioctl(fd, GET_ARRAY_INFO, &array)) { | |
182 | fprintf(stderr, Name ": cannot get array info for %s\n", | |
183 | devname); | |
184 | return 1; | |
185 | } | |
cd29a5c8 NB |
186 | for (dv = devlist ; dv; dv=dv->next) { |
187 | if (stat(dv->devname, &stb)) { | |
682c7051 | 188 | fprintf(stderr, Name ": cannot find %s: %s\n", |
cd29a5c8 | 189 | dv->devname, strerror(errno)); |
682c7051 NB |
190 | return 1; |
191 | } | |
192 | if ((stb.st_mode & S_IFMT) != S_IFBLK) { | |
193 | fprintf(stderr, Name ": %s is not a block device.\n", | |
cd29a5c8 | 194 | dv->devname); |
682c7051 NB |
195 | return 1; |
196 | } | |
cd29a5c8 | 197 | switch(dv->disposition){ |
682c7051 | 198 | default: |
c913b90e NB |
199 | fprintf(stderr, Name ": internal error - devmode[%s]=%d\n", |
200 | dv->devname, dv->disposition); | |
682c7051 NB |
201 | return 1; |
202 | case 'a': | |
203 | /* add the device - hot or cold */ | |
fe80f49b NB |
204 | st = super_by_version(array.major_version, |
205 | array.minor_version); | |
206 | if (!st) { | |
207 | fprintf(stderr, Name ": unsupport array - version %d.%d\n", | |
208 | array.major_version, array.minor_version); | |
209 | return 1; | |
210 | } | |
211 | ||
f277ce36 | 212 | /* Make sure it isn't in use (in 2.6 or later) */ |
0fbf459d NB |
213 | tfd = open(dv->devname, O_RDONLY|O_EXCL); |
214 | if (tfd < 0) { | |
d7eaf49f NB |
215 | fprintf(stderr, Name ": Cannot open %s: %s\n", |
216 | dv->devname, strerror(errno)); | |
217 | return 1; | |
218 | } | |
fe80f49b NB |
219 | if (array.not_persistent==0) |
220 | st->ss->load_super(st, tfd, &osuper, NULL); | |
221 | /* will use osuper later */ | |
0fbf459d | 222 | close(tfd); |
fe80f49b | 223 | |
60d9a174 NB |
224 | if (array.major_version == 0 && |
225 | md_get_version(fd)%100 < 2) { | |
892debc8 NB |
226 | if (ioctl(fd, HOT_ADD_DISK, |
227 | (unsigned long)stb.st_rdev)==0) { | |
dab6685f NB |
228 | if (verbose >= 0) |
229 | fprintf(stderr, Name ": hot added %s\n", | |
230 | dv->devname); | |
892debc8 NB |
231 | continue; |
232 | } | |
233 | ||
cd29a5c8 | 234 | fprintf(stderr, Name ": hot add failed for %s: %s\n", |
892debc8 | 235 | dv->devname, strerror(errno)); |
cd29a5c8 NB |
236 | return 1; |
237 | } | |
892debc8 | 238 | |
fe80f49b NB |
239 | if (array.not_persistent == 0) { |
240 | ||
241 | /* need to find a sample superblock to copy, and | |
242 | * a spare slot to use | |
243 | */ | |
244 | for (j=0; j<st->max_devs; j++) { | |
245 | char *dev; | |
246 | int dfd; | |
247 | disc.number = j; | |
248 | if (ioctl(fd, GET_DISK_INFO, &disc)) | |
249 | continue; | |
250 | if (disc.major==0 && disc.minor==0) | |
251 | continue; | |
252 | if ((disc.state & 4)==0) continue; /* sync */ | |
253 | /* Looks like a good device to try */ | |
16c6fa80 | 254 | dev = map_dev(disc.major, disc.minor, 1); |
fe80f49b | 255 | if (!dev) continue; |
16c6fa80 | 256 | dfd = dev_open(dev, O_RDONLY); |
fe80f49b NB |
257 | if (dfd < 0) continue; |
258 | if (st->ss->load_super(st, dfd, &dsuper, NULL)) { | |
259 | close(dfd); | |
260 | continue; | |
261 | } | |
892debc8 | 262 | close(dfd); |
fe80f49b NB |
263 | break; |
264 | } | |
265 | if (!dsuper) { | |
266 | fprintf(stderr, Name ": cannot find valid superblock in this array - HELP\n"); | |
267 | return 1; | |
268 | } | |
269 | /* Possibly this device was recently part of the array | |
270 | * and was temporarily removed, and is now being re-added. | |
271 | * If so, we can simply re-add it. | |
272 | */ | |
273 | st->ss->uuid_from_super(duuid, dsuper); | |
7eae7080 NB |
274 | |
275 | /* re-add doesn't work for version-1 superblocks | |
276 | * before 2.6.18 :-( | |
277 | */ | |
278 | if (array.major_version == 1 && | |
279 | get_linux_version() <= 2006018) | |
280 | ; | |
281 | else if (osuper) { | |
fe80f49b NB |
282 | st->ss->uuid_from_super(ouuid, osuper); |
283 | if (memcmp(duuid, ouuid, sizeof(ouuid))==0) { | |
284 | /* look close enough for now. Kernel | |
285 | * will worry about where a bitmap | |
286 | * based reconstruct is possible | |
287 | */ | |
288 | struct mdinfo mdi; | |
31317663 | 289 | st->ss->getinfo_super(&mdi, osuper); |
fe80f49b NB |
290 | disc.major = major(stb.st_rdev); |
291 | disc.minor = minor(stb.st_rdev); | |
292 | disc.number = mdi.disk.number; | |
293 | disc.raid_disk = mdi.disk.raid_disk; | |
294 | disc.state = mdi.disk.state; | |
295 | if (ioctl(fd, ADD_NEW_DISK, &disc) == 0) { | |
296 | if (verbose >= 0) | |
297 | fprintf(stderr, Name ": re-added %s\n", dv->devname); | |
308e1801 | 298 | continue; |
fe80f49b NB |
299 | } |
300 | /* fall back on normal-add */ | |
301 | } | |
892debc8 | 302 | } |
892debc8 | 303 | } |
7eae7080 NB |
304 | /* in 2.6.17 and earlier, version-1 superblocks won't |
305 | * use the number we write, but will choose a free number. | |
306 | * we must choose the same free number, which requires | |
307 | * starting at 'raid_disks' and counting up | |
308 | */ | |
309 | for (j = array.raid_disks; j< st->max_devs; j++) { | |
aa88f531 | 310 | disc.number = j; |
682c7051 NB |
311 | if (ioctl(fd, GET_DISK_INFO, &disc)) |
312 | break; | |
313 | if (disc.major==0 && disc.minor==0) | |
314 | break; | |
315 | if (disc.state & 8) /* removed */ | |
316 | break; | |
317 | } | |
0df46c2a NB |
318 | disc.major = major(stb.st_rdev); |
319 | disc.minor = minor(stb.st_rdev); | |
892debc8 NB |
320 | disc.number =j; |
321 | disc.state = 0; | |
fe80f49b NB |
322 | if (array.not_persistent==0) { |
323 | if (dv->writemostly) | |
324 | disc.state |= 1 << MD_DISK_WRITEMOSTLY; | |
325 | st->ss->add_to_super(dsuper, &disc); | |
1bf4e2d9 | 326 | if (st->ss->write_init_super(st, dsuper, &disc, dv->devname)) |
fe80f49b NB |
327 | return 1; |
328 | } else if (dv->re_add) { | |
329 | /* this had better be raid1. | |
330 | * As we are "--re-add"ing we must find a spare slot | |
331 | * to fill. | |
332 | */ | |
333 | char *used = malloc(array.raid_disks); | |
334 | memset(used, 0, array.raid_disks); | |
335 | for (j=0; j< st->max_devs; j++) { | |
336 | mdu_disk_info_t disc2; | |
337 | disc2.number = j; | |
338 | if (ioctl(fd, GET_DISK_INFO, &disc2)) | |
339 | continue; | |
340 | if (disc2.major==0 && disc2.minor==0) | |
341 | continue; | |
342 | if (disc2.state & 8) /* removed */ | |
343 | continue; | |
344 | if (disc2.raid_disk < 0) | |
345 | continue; | |
346 | if (disc2.raid_disk > array.raid_disks) | |
347 | continue; | |
348 | used[disc2.raid_disk] = 1; | |
349 | } | |
350 | for (j=0 ; j<array.raid_disks; j++) | |
351 | if (!used[j]) { | |
352 | disc.raid_disk = j; | |
353 | disc.state |= (1<<MD_DISK_SYNC); | |
354 | break; | |
355 | } | |
356 | } | |
d8def61c NB |
357 | if (dv->writemostly) |
358 | disc.state |= (1 << MD_DISK_WRITEMOSTLY); | |
682c7051 | 359 | if (ioctl(fd,ADD_NEW_DISK, &disc)) { |
f277ce36 NB |
360 | fprintf(stderr, Name ": add new device failed for %s as %d: %s\n", |
361 | dv->devname, j, strerror(errno)); | |
682c7051 NB |
362 | return 1; |
363 | } | |
dab6685f NB |
364 | if (verbose >= 0) |
365 | fprintf(stderr, Name ": added %s\n", dv->devname); | |
682c7051 NB |
366 | break; |
367 | ||
368 | case 'r': | |
369 | /* hot remove */ | |
82b27616 | 370 | /* FIXME check that it is a current member */ |
cd29a5c8 | 371 | if (ioctl(fd, HOT_REMOVE_DISK, (unsigned long)stb.st_rdev)) { |
682c7051 | 372 | fprintf(stderr, Name ": hot remove failed for %s: %s\n", |
cd29a5c8 | 373 | dv->devname, strerror(errno)); |
682c7051 NB |
374 | return 1; |
375 | } | |
dab6685f NB |
376 | if (verbose >= 0) |
377 | fprintf(stderr, Name ": hot removed %s\n", dv->devname); | |
682c7051 NB |
378 | break; |
379 | ||
380 | case 'f': /* set faulty */ | |
381 | /* FIXME check current member */ | |
cd29a5c8 | 382 | if (ioctl(fd, SET_DISK_FAULTY, (unsigned long) stb.st_rdev)) { |
b83d95f3 | 383 | fprintf(stderr, Name ": set device faulty failed for %s: %s\n", |
cd29a5c8 | 384 | dv->devname, strerror(errno)); |
682c7051 NB |
385 | return 1; |
386 | } | |
dab6685f NB |
387 | if (verbose >= 0) |
388 | fprintf(stderr, Name ": set %s faulty in %s\n", | |
389 | dv->devname, devname); | |
682c7051 NB |
390 | break; |
391 | } | |
392 | } | |
393 | return 0; | |
394 | ||
64c4757e | 395 | } |