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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 | * |
cd29a5c8 | 4 | * Copyright (C) 2001-2002 Neil Brown <neilb@cse.unsw.edu.au> |
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)) { | |
91f068bf NB |
109 | if (!quiet) |
110 | fprintf(stderr, Name ": fail to stop array %s: %s\n", | |
111 | devname, strerror(errno)); | |
682c7051 NB |
112 | return 1; |
113 | } | |
114 | } | |
115 | return 0; | |
64c4757e NB |
116 | } |
117 | ||
dd0781e5 NB |
118 | int Manage_resize(char *devname, int fd, long long size, int raid_disks) |
119 | { | |
120 | mdu_array_info_t info; | |
121 | if (ioctl(fd, GET_ARRAY_INFO, &info) != 0) { | |
122 | fprintf(stderr, Name ": Cannot get array information for %s: %s\n", | |
123 | devname, strerror(errno)); | |
124 | return 1; | |
125 | } | |
126 | if (size >= 0) | |
127 | info.size = size; | |
128 | if (raid_disks > 0) | |
129 | info.raid_disks = raid_disks; | |
130 | if (ioctl(fd, SET_ARRAY_INFO, &info) != 0) { | |
131 | fprintf(stderr, Name ": Cannot set device size/shape for %s: %s\n", | |
132 | devname, strerror(errno)); | |
133 | return 1; | |
134 | } | |
135 | return 0; | |
136 | } | |
137 | ||
b5e64645 NB |
138 | int Manage_reconfig(char *devname, int fd, int layout) |
139 | { | |
140 | mdu_array_info_t info; | |
141 | if (ioctl(fd, GET_ARRAY_INFO, &info) != 0) { | |
142 | fprintf(stderr, Name ": Cannot get array information for %s: %s\n", | |
143 | devname, strerror(errno)); | |
144 | return 1; | |
145 | } | |
146 | info.layout = layout; | |
147 | printf("layout set to %d\n", info.layout); | |
148 | if (ioctl(fd, SET_ARRAY_INFO, &info) != 0) { | |
149 | fprintf(stderr, Name ": Cannot set layout for %s: %s\n", | |
150 | devname, strerror(errno)); | |
151 | return 1; | |
152 | } | |
153 | return 0; | |
154 | } | |
dd0781e5 | 155 | |
64c4757e | 156 | int Manage_subdevs(char *devname, int fd, |
dab6685f | 157 | mddev_dev_t devlist, int verbose) |
cd29a5c8 | 158 | { |
682c7051 NB |
159 | /* do something to each dev. |
160 | * devmode can be | |
161 | * 'a' - add the device | |
162 | * try HOT_ADD_DISK | |
163 | * If that fails EINVAL, try ADD_NEW_DISK | |
164 | * 'r' - remove the device HOT_REMOVE_DISK | |
165 | * 'f' - set the device faulty SET_DISK_FAULTY | |
166 | */ | |
167 | mdu_array_info_t array; | |
168 | mdu_disk_info_t disc; | |
cd29a5c8 | 169 | mddev_dev_t dv; |
682c7051 | 170 | struct stat stb; |
c913b90e | 171 | int j; |
0fbf459d | 172 | int tfd; |
892debc8 NB |
173 | struct supertype *st; |
174 | void *dsuper = NULL; | |
fe80f49b NB |
175 | void *osuper = NULL; /* original super */ |
176 | int duuid[4]; | |
177 | int ouuid[4]; | |
682c7051 NB |
178 | |
179 | if (ioctl(fd, GET_ARRAY_INFO, &array)) { | |
180 | fprintf(stderr, Name ": cannot get array info for %s\n", | |
181 | devname); | |
182 | return 1; | |
183 | } | |
cd29a5c8 NB |
184 | for (dv = devlist ; dv; dv=dv->next) { |
185 | if (stat(dv->devname, &stb)) { | |
682c7051 | 186 | fprintf(stderr, Name ": cannot find %s: %s\n", |
cd29a5c8 | 187 | dv->devname, strerror(errno)); |
682c7051 NB |
188 | return 1; |
189 | } | |
190 | if ((stb.st_mode & S_IFMT) != S_IFBLK) { | |
191 | fprintf(stderr, Name ": %s is not a block device.\n", | |
cd29a5c8 | 192 | dv->devname); |
682c7051 NB |
193 | return 1; |
194 | } | |
cd29a5c8 | 195 | switch(dv->disposition){ |
682c7051 | 196 | default: |
c913b90e NB |
197 | fprintf(stderr, Name ": internal error - devmode[%s]=%d\n", |
198 | dv->devname, dv->disposition); | |
682c7051 NB |
199 | return 1; |
200 | case 'a': | |
201 | /* add the device - hot or cold */ | |
fe80f49b NB |
202 | st = super_by_version(array.major_version, |
203 | array.minor_version); | |
204 | if (!st) { | |
205 | fprintf(stderr, Name ": unsupport array - version %d.%d\n", | |
206 | array.major_version, array.minor_version); | |
207 | return 1; | |
208 | } | |
209 | ||
f277ce36 | 210 | /* Make sure it isn't in use (in 2.6 or later) */ |
0fbf459d NB |
211 | tfd = open(dv->devname, O_RDONLY|O_EXCL); |
212 | if (tfd < 0) { | |
d7eaf49f NB |
213 | fprintf(stderr, Name ": Cannot open %s: %s\n", |
214 | dv->devname, strerror(errno)); | |
215 | return 1; | |
216 | } | |
fe80f49b NB |
217 | if (array.not_persistent==0) |
218 | st->ss->load_super(st, tfd, &osuper, NULL); | |
219 | /* will use osuper later */ | |
0fbf459d | 220 | close(tfd); |
fe80f49b | 221 | |
60d9a174 NB |
222 | if (array.major_version == 0 && |
223 | md_get_version(fd)%100 < 2) { | |
892debc8 NB |
224 | if (ioctl(fd, HOT_ADD_DISK, |
225 | (unsigned long)stb.st_rdev)==0) { | |
dab6685f NB |
226 | if (verbose >= 0) |
227 | fprintf(stderr, Name ": hot added %s\n", | |
228 | dv->devname); | |
892debc8 NB |
229 | continue; |
230 | } | |
231 | ||
cd29a5c8 | 232 | fprintf(stderr, Name ": hot add failed for %s: %s\n", |
892debc8 | 233 | dv->devname, strerror(errno)); |
cd29a5c8 NB |
234 | return 1; |
235 | } | |
892debc8 | 236 | |
fe80f49b NB |
237 | if (array.not_persistent == 0) { |
238 | ||
239 | /* need to find a sample superblock to copy, and | |
240 | * a spare slot to use | |
241 | */ | |
242 | for (j=0; j<st->max_devs; j++) { | |
243 | char *dev; | |
244 | int dfd; | |
245 | disc.number = j; | |
246 | if (ioctl(fd, GET_DISK_INFO, &disc)) | |
247 | continue; | |
248 | if (disc.major==0 && disc.minor==0) | |
249 | continue; | |
250 | if ((disc.state & 4)==0) continue; /* sync */ | |
251 | /* Looks like a good device to try */ | |
252 | dev = map_dev(disc.major, disc.minor); | |
253 | if (!dev) continue; | |
254 | dfd = open(dev, O_RDONLY); | |
255 | if (dfd < 0) continue; | |
256 | if (st->ss->load_super(st, dfd, &dsuper, NULL)) { | |
257 | close(dfd); | |
258 | continue; | |
259 | } | |
892debc8 | 260 | close(dfd); |
fe80f49b NB |
261 | break; |
262 | } | |
263 | if (!dsuper) { | |
264 | fprintf(stderr, Name ": cannot find valid superblock in this array - HELP\n"); | |
265 | return 1; | |
266 | } | |
267 | /* Possibly this device was recently part of the array | |
268 | * and was temporarily removed, and is now being re-added. | |
269 | * If so, we can simply re-add it. | |
270 | */ | |
271 | st->ss->uuid_from_super(duuid, dsuper); | |
272 | ||
273 | if (osuper) { | |
274 | st->ss->uuid_from_super(ouuid, osuper); | |
275 | if (memcmp(duuid, ouuid, sizeof(ouuid))==0) { | |
276 | /* look close enough for now. Kernel | |
277 | * will worry about where a bitmap | |
278 | * based reconstruct is possible | |
279 | */ | |
280 | struct mdinfo mdi; | |
281 | struct mddev_ident_s ident; | |
282 | st->ss->getinfo_super(&mdi, &ident, osuper); | |
283 | disc.major = major(stb.st_rdev); | |
284 | disc.minor = minor(stb.st_rdev); | |
285 | disc.number = mdi.disk.number; | |
286 | disc.raid_disk = mdi.disk.raid_disk; | |
287 | disc.state = mdi.disk.state; | |
288 | if (ioctl(fd, ADD_NEW_DISK, &disc) == 0) { | |
289 | if (verbose >= 0) | |
290 | fprintf(stderr, Name ": re-added %s\n", dv->devname); | |
291 | return 0; | |
292 | } | |
293 | /* fall back on normal-add */ | |
294 | } | |
892debc8 | 295 | } |
892debc8 | 296 | } |
f277ce36 | 297 | for (j=0; j< st->max_devs; j++) { |
aa88f531 | 298 | disc.number = j; |
682c7051 NB |
299 | if (ioctl(fd, GET_DISK_INFO, &disc)) |
300 | break; | |
301 | if (disc.major==0 && disc.minor==0) | |
302 | break; | |
303 | if (disc.state & 8) /* removed */ | |
304 | break; | |
305 | } | |
0df46c2a NB |
306 | disc.major = major(stb.st_rdev); |
307 | disc.minor = minor(stb.st_rdev); | |
892debc8 NB |
308 | disc.number =j; |
309 | disc.state = 0; | |
fe80f49b NB |
310 | if (array.not_persistent==0) { |
311 | if (dv->writemostly) | |
312 | disc.state |= 1 << MD_DISK_WRITEMOSTLY; | |
313 | st->ss->add_to_super(dsuper, &disc); | |
34163fc7 | 314 | if (st->ss->write_init_super(st, dsuper, &disc, dv->devname, 0 /* FIXME */)) |
fe80f49b NB |
315 | return 1; |
316 | } else if (dv->re_add) { | |
317 | /* this had better be raid1. | |
318 | * As we are "--re-add"ing we must find a spare slot | |
319 | * to fill. | |
320 | */ | |
321 | char *used = malloc(array.raid_disks); | |
322 | memset(used, 0, array.raid_disks); | |
323 | for (j=0; j< st->max_devs; j++) { | |
324 | mdu_disk_info_t disc2; | |
325 | disc2.number = j; | |
326 | if (ioctl(fd, GET_DISK_INFO, &disc2)) | |
327 | continue; | |
328 | if (disc2.major==0 && disc2.minor==0) | |
329 | continue; | |
330 | if (disc2.state & 8) /* removed */ | |
331 | continue; | |
332 | if (disc2.raid_disk < 0) | |
333 | continue; | |
334 | if (disc2.raid_disk > array.raid_disks) | |
335 | continue; | |
336 | used[disc2.raid_disk] = 1; | |
337 | } | |
338 | for (j=0 ; j<array.raid_disks; j++) | |
339 | if (!used[j]) { | |
340 | disc.raid_disk = j; | |
341 | disc.state |= (1<<MD_DISK_SYNC); | |
342 | break; | |
343 | } | |
344 | } | |
682c7051 | 345 | if (ioctl(fd,ADD_NEW_DISK, &disc)) { |
f277ce36 NB |
346 | fprintf(stderr, Name ": add new device failed for %s as %d: %s\n", |
347 | dv->devname, j, strerror(errno)); | |
682c7051 NB |
348 | return 1; |
349 | } | |
dab6685f NB |
350 | if (verbose >= 0) |
351 | fprintf(stderr, Name ": added %s\n", dv->devname); | |
682c7051 NB |
352 | break; |
353 | ||
354 | case 'r': | |
355 | /* hot remove */ | |
82b27616 | 356 | /* FIXME check that it is a current member */ |
cd29a5c8 | 357 | if (ioctl(fd, HOT_REMOVE_DISK, (unsigned long)stb.st_rdev)) { |
682c7051 | 358 | fprintf(stderr, Name ": hot remove failed for %s: %s\n", |
cd29a5c8 | 359 | dv->devname, strerror(errno)); |
682c7051 NB |
360 | return 1; |
361 | } | |
dab6685f NB |
362 | if (verbose >= 0) |
363 | fprintf(stderr, Name ": hot removed %s\n", dv->devname); | |
682c7051 NB |
364 | break; |
365 | ||
366 | case 'f': /* set faulty */ | |
367 | /* FIXME check current member */ | |
cd29a5c8 | 368 | if (ioctl(fd, SET_DISK_FAULTY, (unsigned long) stb.st_rdev)) { |
b83d95f3 | 369 | fprintf(stderr, Name ": set device faulty failed for %s: %s\n", |
cd29a5c8 | 370 | dv->devname, strerror(errno)); |
682c7051 NB |
371 | return 1; |
372 | } | |
dab6685f NB |
373 | if (verbose >= 0) |
374 | fprintf(stderr, Name ": set %s faulty in %s\n", | |
375 | dv->devname, devname); | |
682c7051 NB |
376 | break; |
377 | } | |
378 | } | |
379 | return 0; | |
380 | ||
64c4757e | 381 | } |