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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 | * |
6f02172d | 4 | * Copyright (C) 2001-2013 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 | #include "md_p.h" |
edd8d13c | 27 | #include <sys/socket.h> |
64c4757e | 28 | #include <sys/utsname.h> |
9fe32043 | 29 | #include <sys/wait.h> |
edd8d13c | 30 | #include <sys/un.h> |
a7dec3fd | 31 | #include <sys/resource.h> |
a9c15847 N |
32 | #include <sys/vfs.h> |
33 | #include <linux/magic.h> | |
986b8688 | 34 | #include <poll.h> |
98c6faba | 35 | #include <ctype.h> |
a322f70c | 36 | #include <dirent.h> |
a931db9e | 37 | #include <signal.h> |
7716570e | 38 | #include <dlfcn.h> |
7716570e | 39 | |
0a816ef9 NB |
40 | |
41 | /* | |
42 | * following taken from linux/blkpg.h because they aren't | |
43 | * anywhere else and it isn't safe to #include linux/ * stuff. | |
44 | */ | |
45 | ||
46 | #define BLKPG _IO(0x12,105) | |
47 | ||
48 | /* The argument structure */ | |
49 | struct blkpg_ioctl_arg { | |
5d500228 N |
50 | int op; |
51 | int flags; | |
52 | int datalen; | |
53 | void *data; | |
0a816ef9 NB |
54 | }; |
55 | ||
56 | /* The subfunctions (for the op field) */ | |
57 | #define BLKPG_ADD_PARTITION 1 | |
58 | #define BLKPG_DEL_PARTITION 2 | |
59 | ||
60 | /* Sizes of name fields. Unused at present. */ | |
61 | #define BLKPG_DEVNAMELTH 64 | |
62 | #define BLKPG_VOLNAMELTH 64 | |
63 | ||
64 | /* The data structure for ADD_PARTITION and DEL_PARTITION */ | |
65 | struct blkpg_partition { | |
66 | long long start; /* starting offset in bytes */ | |
67 | long long length; /* length in bytes */ | |
68 | int pno; /* partition number */ | |
69 | char devname[BLKPG_DEVNAMELTH]; /* partition name, like sda5 or c0d1p2, | |
70 | to be used in kernel messages */ | |
71 | char volname[BLKPG_VOLNAMELTH]; /* volume label */ | |
72 | }; | |
64c4757e | 73 | |
0f22b998 | 74 | #include "part.h" |
056b331e N |
75 | |
76 | /* Force a compilation error if condition is true */ | |
77 | #define BUILD_BUG_ON(condition) ((void)BUILD_BUG_ON_ZERO(condition)) | |
78 | ||
79 | /* Force a compilation error if condition is true, but also produce a | |
80 | result (of value 0 and type size_t), so the expression can be used | |
81 | e.g. in a structure initializer (or where-ever else comma expressions | |
82 | aren't permitted). */ | |
83 | #define BUILD_BUG_ON_ZERO(e) (sizeof(struct { int:-!!(e); })) | |
84 | ||
d15a1f72 | 85 | static int is_dlm_hooks_ready = 0; |
7071320a N |
86 | |
87 | int dlm_funs_ready(void) | |
88 | { | |
89 | return is_dlm_hooks_ready ? 1 : 0; | |
90 | } | |
91 | ||
7071320a | 92 | static struct dlm_hooks *dlm_hooks = NULL; |
d15a1f72 GJ |
93 | struct dlm_lock_resource *dlm_lock_res = NULL; |
94 | static int ast_called = 0; | |
95 | ||
96 | struct dlm_lock_resource { | |
97 | dlm_lshandle_t *ls; | |
98 | struct dlm_lksb lksb; | |
99 | }; | |
100 | ||
d15a1f72 GJ |
101 | /* Using poll(2) to wait for and dispatch ASTs */ |
102 | static int poll_for_ast(dlm_lshandle_t ls) | |
103 | { | |
104 | struct pollfd pfd; | |
105 | ||
106 | pfd.fd = dlm_hooks->ls_get_fd(ls); | |
107 | pfd.events = POLLIN; | |
108 | ||
109 | while (!ast_called) | |
110 | { | |
111 | if (poll(&pfd, 1, 0) < 0) | |
112 | { | |
113 | perror("poll"); | |
114 | return -1; | |
115 | } | |
116 | dlm_hooks->dispatch(dlm_hooks->ls_get_fd(ls)); | |
117 | } | |
118 | ast_called = 0; | |
119 | ||
120 | return 0; | |
121 | } | |
122 | ||
123 | static void dlm_ast(void *arg) | |
124 | { | |
125 | ast_called = 1; | |
126 | } | |
127 | ||
81a8a694 | 128 | static char *cluster_name = NULL; |
d15a1f72 | 129 | /* Create the lockspace, take bitmapXXX locks on all the bitmaps. */ |
81a8a694 | 130 | int cluster_get_dlmlock(int *lockid) |
d15a1f72 GJ |
131 | { |
132 | int ret = -1; | |
133 | char str[64]; | |
134 | int flags = LKF_NOQUEUE; | |
135 | ||
81a8a694 GJ |
136 | ret = get_cluster_name(&cluster_name); |
137 | if (ret) { | |
138 | pr_err("The md can't get cluster name\n"); | |
139 | return -1; | |
140 | } | |
141 | ||
d15a1f72 | 142 | dlm_lock_res = xmalloc(sizeof(struct dlm_lock_resource)); |
81a8a694 | 143 | dlm_lock_res->ls = dlm_hooks->create_lockspace(cluster_name, O_RDWR); |
d15a1f72 | 144 | if (!dlm_lock_res->ls) { |
81a8a694 | 145 | pr_err("%s failed to create lockspace\n", cluster_name); |
32539f74 | 146 | return -ENOMEM; |
d15a1f72 GJ |
147 | } |
148 | ||
81a8a694 | 149 | snprintf(str, 64, "bitmap%s", cluster_name); |
d15a1f72 GJ |
150 | ret = dlm_hooks->ls_lock(dlm_lock_res->ls, LKM_PWMODE, &dlm_lock_res->lksb, |
151 | flags, str, strlen(str), 0, dlm_ast, | |
152 | dlm_lock_res, NULL, NULL); | |
153 | if (ret) { | |
154 | pr_err("error %d when get PW mode on lock %s\n", errno, str); | |
32539f74 GJ |
155 | dlm_hooks->release_lockspace(cluster_name, dlm_lock_res->ls, 1); |
156 | return ret; | |
d15a1f72 GJ |
157 | } |
158 | ||
159 | /* Wait for it to complete */ | |
160 | poll_for_ast(dlm_lock_res->ls); | |
161 | *lockid = dlm_lock_res->lksb.sb_lkid; | |
162 | ||
32539f74 | 163 | return dlm_lock_res->lksb.sb_status; |
d15a1f72 GJ |
164 | } |
165 | ||
81a8a694 | 166 | int cluster_release_dlmlock(int lockid) |
d15a1f72 GJ |
167 | { |
168 | int ret = -1; | |
169 | ||
81a8a694 GJ |
170 | if (!cluster_name) |
171 | return -1; | |
172 | ||
d15a1f72 GJ |
173 | ret = dlm_hooks->ls_unlock(dlm_lock_res->ls, lockid, 0, |
174 | &dlm_lock_res->lksb, dlm_lock_res); | |
175 | if (ret) { | |
176 | pr_err("error %d happened when unlock\n", errno); | |
177 | /* XXX make sure the lock is unlocked eventually */ | |
178 | goto out; | |
179 | } | |
180 | ||
181 | /* Wait for it to complete */ | |
182 | poll_for_ast(dlm_lock_res->ls); | |
183 | ||
184 | errno = dlm_lock_res->lksb.sb_status; | |
185 | if (errno != EUNLOCK) { | |
186 | pr_err("error %d happened in ast when unlock lockspace\n", errno); | |
187 | /* XXX make sure the lockspace is unlocked eventually */ | |
188 | goto out; | |
189 | } | |
190 | ||
81a8a694 | 191 | ret = dlm_hooks->release_lockspace(cluster_name, dlm_lock_res->ls, 1); |
d15a1f72 GJ |
192 | if (ret) { |
193 | pr_err("error %d happened when release lockspace\n", errno); | |
194 | /* XXX make sure the lockspace is released eventually */ | |
195 | goto out; | |
196 | } | |
197 | free(dlm_lock_res); | |
198 | ||
199 | out: | |
200 | return ret; | |
201 | } | |
202 | ||
3ab8f4bf JS |
203 | int md_array_active(int fd) |
204 | { | |
205 | struct mdinfo *sra; | |
206 | struct mdu_array_info_s array; | |
207 | int ret; | |
208 | ||
209 | sra = sysfs_read(fd, NULL, GET_ARRAY_STATE); | |
210 | if (sra) { | |
211 | if (sra->array_state != ARRAY_CLEAR && | |
212 | sra->array_state != ARRAY_INACTIVE && | |
213 | sra->array_state != ARRAY_UNKNOWN_STATE) | |
214 | ret = 0; | |
215 | else | |
216 | ret = -ENODEV; | |
217 | ||
218 | free(sra); | |
219 | } else { | |
220 | /* | |
221 | * GET_ARRAY_INFO doesn't provide access to the proper state | |
222 | * information, so fallback to a basic check for raid_disks != 0 | |
223 | */ | |
224 | ret = ioctl(fd, GET_ARRAY_INFO, &array); | |
225 | } | |
226 | ||
227 | return !ret; | |
228 | } | |
229 | ||
9cd39f01 JS |
230 | /* |
231 | * Get array info from the kernel. Longer term we want to deprecate the | |
232 | * ioctl and get it from sysfs. | |
233 | */ | |
234 | int md_get_array_info(int fd, struct mdu_array_info_s *array) | |
235 | { | |
236 | return ioctl(fd, GET_ARRAY_INFO, array); | |
237 | } | |
238 | ||
018a4882 JS |
239 | /* |
240 | * Set array info | |
241 | */ | |
242 | int md_set_array_info(int fd, struct mdu_array_info_s *array) | |
243 | { | |
244 | return ioctl(fd, SET_ARRAY_INFO, array); | |
245 | } | |
246 | ||
d97572f5 JS |
247 | /* |
248 | * Get disk info from the kernel. | |
249 | */ | |
250 | int md_get_disk_info(int fd, struct mdu_disk_info_s *disk) | |
251 | { | |
252 | return ioctl(fd, GET_DISK_INFO, disk); | |
253 | } | |
254 | ||
64c4757e NB |
255 | /* |
256 | * Parse a 128 bit uuid in 4 integers | |
257 | * format is 32 hexx nibbles with options :.<space> separator | |
258 | * If not exactly 32 hex digits are found, return 0 | |
259 | * else return 1 | |
260 | */ | |
261 | int parse_uuid(char *str, int uuid[4]) | |
262 | { | |
aba69144 NB |
263 | int hit = 0; /* number of Hex digIT */ |
264 | int i; | |
265 | char c; | |
ca3b6696 N |
266 | for (i = 0; i < 4; i++) |
267 | uuid[i] = 0; | |
aba69144 | 268 | |
ca3b6696 | 269 | while ((c = *str++) != 0) { |
aba69144 | 270 | int n; |
ca3b6696 | 271 | if (c >= '0' && c <= '9') |
aba69144 | 272 | n = c-'0'; |
ca3b6696 | 273 | else if (c >= 'a' && c <= 'f') |
aba69144 | 274 | n = 10 + c - 'a'; |
ca3b6696 | 275 | else if (c >= 'A' && c <= 'F') |
aba69144 NB |
276 | n = 10 + c - 'A'; |
277 | else if (strchr(":. -", c)) | |
278 | continue; | |
279 | else return 0; | |
280 | ||
281 | if (hit<32) { | |
282 | uuid[hit/8] <<= 4; | |
283 | uuid[hit/8] += n; | |
284 | } | |
285 | hit++; | |
82b27616 | 286 | } |
aba69144 NB |
287 | if (hit == 32) |
288 | return 1; | |
289 | return 0; | |
64c4757e NB |
290 | } |
291 | ||
64c4757e NB |
292 | int get_linux_version() |
293 | { | |
294 | struct utsname name; | |
98c6faba | 295 | char *cp; |
f161d047 | 296 | int a = 0, b = 0,c = 0; |
64c4757e NB |
297 | if (uname(&name) <0) |
298 | return -1; | |
299 | ||
98c6faba NB |
300 | cp = name.release; |
301 | a = strtoul(cp, &cp, 10); | |
f161d047 N |
302 | if (*cp == '.') |
303 | b = strtoul(cp+1, &cp, 10); | |
304 | if (*cp == '.') | |
305 | c = strtoul(cp+1, &cp, 10); | |
98c6faba | 306 | |
682c7051 | 307 | return (a*1000000)+(b*1000)+c; |
64c4757e NB |
308 | } |
309 | ||
bc77ed53 DW |
310 | int mdadm_version(char *version) |
311 | { | |
312 | int a, b, c; | |
313 | char *cp; | |
314 | ||
315 | if (!version) | |
316 | version = Version; | |
317 | ||
318 | cp = strchr(version, '-'); | |
319 | if (!cp || *(cp+1) != ' ' || *(cp+2) != 'v') | |
320 | return -1; | |
321 | cp += 3; | |
322 | a = strtoul(cp, &cp, 10); | |
323 | if (*cp != '.') | |
324 | return -1; | |
325 | b = strtoul(cp+1, &cp, 10); | |
326 | if (*cp == '.') | |
327 | c = strtoul(cp+1, &cp, 10); | |
328 | else | |
329 | c = 0; | |
330 | if (*cp != ' ' && *cp != '-') | |
331 | return -1; | |
332 | return (a*1000000)+(b*1000)+c; | |
333 | } | |
334 | ||
51d4261c | 335 | unsigned long long parse_size(char *size) |
84e11361 N |
336 | { |
337 | /* parse 'size' which should be a number optionally | |
338 | * followed by 'K', 'M', or 'G'. | |
339 | * Without a suffix, K is assumed. | |
340 | * Number returned is in sectors (half-K) | |
822e393a | 341 | * INVALID_SECTORS returned on error. |
84e11361 N |
342 | */ |
343 | char *c; | |
344 | long long s = strtoll(size, &c, 10); | |
345 | if (s > 0) { | |
346 | switch (*c) { | |
347 | case 'K': | |
348 | c++; | |
349 | default: | |
350 | s *= 2; | |
351 | break; | |
352 | case 'M': | |
353 | c++; | |
354 | s *= 1024 * 2; | |
355 | break; | |
356 | case 'G': | |
357 | c++; | |
358 | s *= 1024 * 1024 * 2; | |
359 | break; | |
72ca9bcf N |
360 | case 's': /* sectors */ |
361 | c++; | |
362 | break; | |
84e11361 | 363 | } |
51d4261c | 364 | } else |
822e393a | 365 | s = INVALID_SECTORS; |
84e11361 | 366 | if (*c) |
822e393a | 367 | s = INVALID_SECTORS; |
84e11361 N |
368 | return s; |
369 | } | |
370 | ||
4a06e2c2 N |
371 | int parse_layout_10(char *layout) |
372 | { | |
373 | int copies, rv; | |
374 | char *cp; | |
375 | /* Parse the layout string for raid10 */ | |
376 | /* 'f', 'o' or 'n' followed by a number <= raid_disks */ | |
377 | if ((layout[0] != 'n' && layout[0] != 'f' && layout[0] != 'o') || | |
378 | (copies = strtoul(layout+1, &cp, 10)) < 1 || | |
379 | copies > 200 || | |
380 | *cp) | |
381 | return -1; | |
382 | if (layout[0] == 'n') | |
383 | rv = 256 + copies; | |
384 | else if (layout[0] == 'o') | |
385 | rv = 0x10000 + (copies<<8) + 1; | |
386 | else | |
387 | rv = 1 + (copies<<8); | |
388 | return rv; | |
389 | } | |
390 | ||
391 | int parse_layout_faulty(char *layout) | |
392 | { | |
393 | /* Parse the layout string for 'faulty' */ | |
394 | int ln = strcspn(layout, "0123456789"); | |
503975b9 | 395 | char *m = xstrdup(layout); |
4a06e2c2 N |
396 | int mode; |
397 | m[ln] = 0; | |
398 | mode = map_name(faultylayout, m); | |
399 | if (mode == UnSet) | |
400 | return -1; | |
401 | ||
402 | return mode | (atoi(layout+ln)<< ModeShift); | |
403 | } | |
79868890 N |
404 | |
405 | long parse_num(char *num) | |
406 | { | |
407 | /* Either return a valid number, or -1 */ | |
408 | char *c; | |
409 | long rv = strtol(num, &c, 10); | |
410 | if (rv < 0 || *c || !num[0]) | |
411 | return -1; | |
412 | else | |
413 | return rv; | |
414 | } | |
4a06e2c2 | 415 | |
4de90913 GJ |
416 | int parse_cluster_confirm_arg(char *input, char **devname, int *slot) |
417 | { | |
418 | char *dev; | |
419 | *slot = strtoul(input, &dev, 10); | |
420 | if (dev == input || dev[0] != ':') | |
421 | return -1; | |
422 | *devname = dev+1; | |
423 | return 0; | |
424 | } | |
425 | ||
0430ed48 NB |
426 | void remove_partitions(int fd) |
427 | { | |
428 | /* remove partitions from this block devices. | |
429 | * This is used for components added to an array | |
430 | */ | |
431 | #ifdef BLKPG_DEL_PARTITION | |
432 | struct blkpg_ioctl_arg a; | |
433 | struct blkpg_partition p; | |
434 | ||
435 | a.op = BLKPG_DEL_PARTITION; | |
436 | a.data = (void*)&p; | |
437 | a.datalen = sizeof(p); | |
438 | a.flags = 0; | |
439 | memset(a.data, 0, a.datalen); | |
ca3b6696 | 440 | for (p.pno = 0; p.pno < 16; p.pno++) |
0430ed48 NB |
441 | ioctl(fd, BLKPG, &a); |
442 | #endif | |
443 | } | |
444 | ||
691c6ee1 N |
445 | int test_partition(int fd) |
446 | { | |
447 | /* Check if fd is a whole-disk or a partition. | |
448 | * BLKPG will return EINVAL on a partition, and BLKPG_DEL_PARTITION | |
449 | * will return ENXIO on an invalid partition number. | |
450 | */ | |
451 | struct blkpg_ioctl_arg a; | |
452 | struct blkpg_partition p; | |
453 | a.op = BLKPG_DEL_PARTITION; | |
454 | a.data = (void*)&p; | |
455 | a.datalen = sizeof(p); | |
456 | a.flags = 0; | |
457 | memset(a.data, 0, a.datalen); | |
458 | p.pno = 1<<30; | |
459 | if (ioctl(fd, BLKPG, &a) == 0) | |
460 | /* Very unlikely, but not a partition */ | |
461 | return 0; | |
357ac106 | 462 | if (errno == ENXIO || errno == ENOTTY) |
691c6ee1 N |
463 | /* not a partition */ |
464 | return 0; | |
465 | ||
466 | return 1; | |
467 | } | |
468 | ||
bfd76b93 CA |
469 | int test_partition_from_id(dev_t id) |
470 | { | |
471 | char buf[20]; | |
472 | int fd, rv; | |
473 | ||
474 | sprintf(buf, "%d:%d", major(id), minor(id)); | |
475 | fd = dev_open(buf, O_RDONLY); | |
476 | if (fd < 0) | |
477 | return -1; | |
478 | rv = test_partition(fd); | |
479 | close(fd); | |
480 | return rv; | |
481 | } | |
691c6ee1 | 482 | |
de5a472e | 483 | int enough(int level, int raid_disks, int layout, int clean, char *avail) |
64c4757e | 484 | { |
265e0f17 | 485 | int copies, first; |
de5a472e N |
486 | int i; |
487 | int avail_disks = 0; | |
488 | ||
489 | for (i = 0; i < raid_disks; i++) | |
490 | avail_disks += !!avail[i]; | |
491 | ||
64c4757e | 492 | switch (level) { |
265e0f17 NB |
493 | case 10: |
494 | /* This is the tricky one - we need to check | |
495 | * which actual disks are present. | |
496 | */ | |
702b557b | 497 | copies = (layout&255)* ((layout>>8) & 255); |
ca3b6696 | 498 | first = 0; |
265e0f17 NB |
499 | do { |
500 | /* there must be one of the 'copies' form 'first' */ | |
501 | int n = copies; | |
ca3b6696 | 502 | int cnt = 0; |
b3ec716d | 503 | int this = first; |
265e0f17 | 504 | while (n--) { |
b3ec716d | 505 | if (avail[this]) |
265e0f17 | 506 | cnt++; |
b3ec716d | 507 | this = (this+1) % raid_disks; |
265e0f17 NB |
508 | } |
509 | if (cnt == 0) | |
510 | return 0; | |
b3ec716d | 511 | first = (first+(layout&255)) % raid_disks; |
265e0f17 NB |
512 | } while (first != 0); |
513 | return 1; | |
e5329c37 | 514 | |
df0d4ea0 | 515 | case LEVEL_MULTIPATH: |
e0d19036 | 516 | return avail_disks>= 1; |
df0d4ea0 | 517 | case LEVEL_LINEAR: |
64c4757e NB |
518 | case 0: |
519 | return avail_disks == raid_disks; | |
520 | case 1: | |
521 | return avail_disks >= 1; | |
522 | case 4: | |
330d6900 N |
523 | if (avail_disks == raid_disks - 1 && |
524 | !avail[raid_disks - 1]) | |
525 | /* If just the parity device is missing, then we | |
526 | * have enough, even if not clean | |
527 | */ | |
528 | return 1; | |
529 | /* FALL THROUGH */ | |
64c4757e | 530 | case 5: |
583315d9 NB |
531 | if (clean) |
532 | return avail_disks >= raid_disks-1; | |
533 | else | |
534 | return avail_disks >= raid_disks; | |
98c6faba | 535 | case 6: |
583315d9 NB |
536 | if (clean) |
537 | return avail_disks >= raid_disks-2; | |
538 | else | |
539 | return avail_disks >= raid_disks; | |
64c4757e NB |
540 | default: |
541 | return 0; | |
542 | } | |
543 | } | |
544 | ||
8453e704 N |
545 | int enough_fd(int fd) |
546 | { | |
547 | struct mdu_array_info_s array; | |
548 | struct mdu_disk_info_s disk; | |
aabe020d | 549 | int i, rv; |
8453e704 N |
550 | char *avail; |
551 | ||
9cd39f01 | 552 | if (md_get_array_info(fd, &array) != 0 || array.raid_disks <= 0) |
8453e704 | 553 | return 0; |
503975b9 | 554 | avail = xcalloc(array.raid_disks, 1); |
ca3b6696 | 555 | for (i = 0; i < MAX_DISKS && array.nr_disks > 0; i++) { |
8453e704 | 556 | disk.number = i; |
d97572f5 | 557 | if (md_get_disk_info(fd, &disk) != 0) |
8453e704 | 558 | continue; |
9e6d9291 N |
559 | if (disk.major == 0 && disk.minor == 0) |
560 | continue; | |
561 | array.nr_disks--; | |
562 | ||
8453e704 N |
563 | if (! (disk.state & (1<<MD_DISK_SYNC))) |
564 | continue; | |
565 | if (disk.raid_disk < 0 || disk.raid_disk >= array.raid_disks) | |
566 | continue; | |
8453e704 N |
567 | avail[disk.raid_disk] = 1; |
568 | } | |
569 | /* This is used on an active array, so assume it is clean */ | |
aabe020d | 570 | rv = enough(array.level, array.raid_disks, array.layout, |
de5a472e | 571 | 1, avail); |
aabe020d JS |
572 | free(avail); |
573 | return rv; | |
8453e704 N |
574 | } |
575 | ||
22e263f6 AC |
576 | const int uuid_zero[4] = { 0, 0, 0, 0 }; |
577 | ||
f277ce36 | 578 | int same_uuid(int a[4], int b[4], int swapuuid) |
64c4757e | 579 | { |
f277ce36 NB |
580 | if (swapuuid) { |
581 | /* parse uuids are hostendian. | |
582 | * uuid's from some superblocks are big-ending | |
aba69144 | 583 | * if there is a difference, we need to swap.. |
f277ce36 NB |
584 | */ |
585 | unsigned char *ac = (unsigned char *)a; | |
586 | unsigned char *bc = (unsigned char *)b; | |
587 | int i; | |
ca3b6696 | 588 | for (i = 0; i < 16; i += 4) { |
f277ce36 NB |
589 | if (ac[i+0] != bc[i+3] || |
590 | ac[i+1] != bc[i+2] || | |
591 | ac[i+2] != bc[i+1] || | |
592 | ac[i+3] != bc[i+0]) | |
593 | return 0; | |
594 | } | |
595 | return 1; | |
596 | } else { | |
597 | if (a[0]==b[0] && | |
598 | a[1]==b[1] && | |
599 | a[2]==b[2] && | |
600 | a[3]==b[3]) | |
601 | return 1; | |
602 | return 0; | |
603 | } | |
64c4757e | 604 | } |
ca3b6696 | 605 | |
350f29f9 NB |
606 | void copy_uuid(void *a, int b[4], int swapuuid) |
607 | { | |
608 | if (swapuuid) { | |
609 | /* parse uuids are hostendian. | |
610 | * uuid's from some superblocks are big-ending | |
611 | * if there is a difference, we need to swap.. | |
612 | */ | |
613 | unsigned char *ac = (unsigned char *)a; | |
614 | unsigned char *bc = (unsigned char *)b; | |
615 | int i; | |
ca3b6696 | 616 | for (i = 0; i < 16; i += 4) { |
350f29f9 NB |
617 | ac[i+0] = bc[i+3]; |
618 | ac[i+1] = bc[i+2]; | |
619 | ac[i+2] = bc[i+1]; | |
620 | ac[i+3] = bc[i+0]; | |
621 | } | |
622 | } else | |
623 | memcpy(a, b, 16); | |
624 | } | |
64c4757e | 625 | |
aae5a112 | 626 | char *__fname_from_uuid(int id[4], int swap, char *buf, char sep) |
d7288ddc | 627 | { |
9968e376 | 628 | int i, j; |
d7288ddc N |
629 | char uuid[16]; |
630 | char *c = buf; | |
631 | strcpy(c, "UUID-"); | |
632 | c += strlen(c); | |
aae5a112 | 633 | copy_uuid(uuid, id, swap); |
9968e376 | 634 | for (i = 0; i < 4; i++) { |
9968e376 | 635 | if (i) |
ff54de6e | 636 | *c++ = sep; |
9968e376 DW |
637 | for (j = 3; j >= 0; j--) { |
638 | sprintf(c,"%02x", (unsigned char) uuid[j+4*i]); | |
639 | c+= 2; | |
640 | } | |
d7288ddc N |
641 | } |
642 | return buf; | |
aae5a112 DW |
643 | |
644 | } | |
645 | ||
646 | char *fname_from_uuid(struct supertype *st, struct mdinfo *info, char *buf, char sep) | |
647 | { | |
86983cce N |
648 | // dirty hack to work around an issue with super1 superblocks... |
649 | // super1 superblocks need swapuuid set in order for assembly to | |
650 | // work, but can't have it set if we want this printout to match | |
651 | // all the other uuid printouts in super1.c, so we force swapuuid | |
652 | // to 1 to make our printout match the rest of super1 | |
653 | return __fname_from_uuid(info->uuid, (st->ss == &super1) ? 1 : st->ss->swapuuid, buf, sep); | |
d7288ddc N |
654 | } |
655 | ||
682c7051 NB |
656 | int check_ext2(int fd, char *name) |
657 | { | |
658 | /* | |
659 | * Check for an ext2fs file system. | |
660 | * Superblock is always 1K at 1K offset | |
661 | * | |
662 | * s_magic is le16 at 56 == 0xEF53 | |
663 | * report mtime - le32 at 44 | |
664 | * blocks - le32 at 4 | |
665 | * logblksize - le32 at 24 | |
666 | */ | |
667 | unsigned char sb[1024]; | |
668 | time_t mtime; | |
2538ba2a N |
669 | unsigned long long size; |
670 | int bsize; | |
682c7051 NB |
671 | if (lseek(fd, 1024,0)!= 1024) |
672 | return 0; | |
673 | if (read(fd, sb, 1024)!= 1024) | |
674 | return 0; | |
675 | if (sb[56] != 0x53 || sb[57] != 0xef) | |
676 | return 0; | |
677 | ||
678 | mtime = sb[44]|(sb[45]|(sb[46]|sb[47]<<8)<<8)<<8; | |
679 | bsize = sb[24]|(sb[25]|(sb[26]|sb[27]<<8)<<8)<<8; | |
680 | size = sb[4]|(sb[5]|(sb[6]|sb[7]<<8)<<8)<<8; | |
2538ba2a | 681 | size <<= bsize; |
e7b84f9d | 682 | pr_err("%s appears to contain an ext2fs file system\n", |
682c7051 | 683 | name); |
2538ba2a | 684 | cont_err("size=%lluK mtime=%s", size, ctime(&mtime)); |
682c7051 NB |
685 | return 1; |
686 | } | |
687 | ||
688 | int check_reiser(int fd, char *name) | |
689 | { | |
690 | /* | |
691 | * superblock is at 64K | |
692 | * size is 1024; | |
693 | * Magic string "ReIsErFs" or "ReIsEr2Fs" at 52 | |
694 | * | |
695 | */ | |
696 | unsigned char sb[1024]; | |
2538ba2a | 697 | unsigned long long size; |
682c7051 NB |
698 | if (lseek(fd, 64*1024, 0) != 64*1024) |
699 | return 0; | |
700 | if (read(fd, sb, 1024) != 1024) | |
701 | return 0; | |
ca3b6696 N |
702 | if (strncmp((char*)sb+52, "ReIsErFs",8) != 0 && |
703 | strncmp((char*)sb+52, "ReIsEr2Fs",9) != 0) | |
682c7051 | 704 | return 0; |
e7b84f9d | 705 | pr_err("%s appears to contain a reiserfs file system\n",name); |
682c7051 | 706 | size = sb[0]|(sb[1]|(sb[2]|sb[3]<<8)<<8)<<8; |
2538ba2a | 707 | cont_err("size = %lluK\n", size*4); |
aba69144 | 708 | |
682c7051 NB |
709 | return 1; |
710 | } | |
711 | ||
712 | int check_raid(int fd, char *name) | |
713 | { | |
4b1ac34b | 714 | struct mdinfo info; |
682c7051 | 715 | time_t crtime; |
d078d77c | 716 | char *level; |
82d9eba6 | 717 | struct supertype *st = guess_super(fd); |
f9ce90ba | 718 | |
cb8f6859 N |
719 | if (!st) |
720 | return 0; | |
fa219dd2 MD |
721 | if (st->ss->add_to_super != NULL) { |
722 | st->ss->load_super(st, fd, name); | |
723 | /* Looks like a raid array .. */ | |
724 | pr_err("%s appears to be part of a raid array:\n", name); | |
725 | st->ss->getinfo_super(st, &info, NULL); | |
726 | st->ss->free_super(st); | |
727 | crtime = info.array.ctime; | |
728 | level = map_num(pers, info.array.level); | |
729 | if (!level) | |
730 | level = "-unknown-"; | |
731 | cont_err("level=%s devices=%d ctime=%s", | |
732 | level, info.array.raid_disks, ctime(&crtime)); | |
733 | } else { | |
734 | /* Looks like GPT or MBR */ | |
735 | pr_err("partition table exists on %s\n", name); | |
736 | } | |
82d9eba6 | 737 | return 1; |
682c7051 NB |
738 | } |
739 | ||
682c7051 NB |
740 | int ask(char *mesg) |
741 | { | |
742 | char *add = ""; | |
743 | int i; | |
ca3b6696 | 744 | for (i = 0; i < 5; i++) { |
682c7051 NB |
745 | char buf[100]; |
746 | fprintf(stderr, "%s%s", mesg, add); | |
747 | fflush(stderr); | |
748 | if (fgets(buf, 100, stdin)==NULL) | |
749 | return 0; | |
750 | if (buf[0]=='y' || buf[0]=='Y') | |
751 | return 1; | |
752 | if (buf[0]=='n' || buf[0]=='N') | |
753 | return 0; | |
754 | add = "(y/n) "; | |
755 | } | |
e7b84f9d | 756 | pr_err("assuming 'no'\n"); |
682c7051 NB |
757 | return 0; |
758 | } | |
759 | ||
8d80900b | 760 | int is_standard(char *dev, int *nump) |
e5329c37 NB |
761 | { |
762 | /* tests if dev is a "standard" md dev name. | |
763 | * i.e if the last component is "/dNN" or "/mdNN", | |
aba69144 | 764 | * where NN is a string of digits |
598f0d58 NB |
765 | * Returns 1 if a partitionable standard, |
766 | * -1 if non-partitonable, | |
767 | * 0 if not a standard name. | |
e5329c37 | 768 | */ |
8d80900b | 769 | char *d = strrchr(dev, '/'); |
ca3b6696 | 770 | int type = 0; |
8d80900b NB |
771 | int num; |
772 | if (!d) | |
e5329c37 | 773 | return 0; |
ca3b6696 N |
774 | if (strncmp(d, "/d",2) == 0) |
775 | d += 2, type = 1; /* /dev/md/dN{pM} */ | |
776 | else if (strncmp(d, "/md_d", 5) == 0) | |
777 | d += 5, type = 1; /* /dev/md_dN{pM} */ | |
778 | else if (strncmp(d, "/md", 3) == 0) | |
779 | d += 3, type = -1; /* /dev/mdN */ | |
780 | else if (d-dev > 3 && strncmp(d-2, "md/", 3) == 0) | |
781 | d += 1, type = -1; /* /dev/md/N */ | |
e5329c37 NB |
782 | else |
783 | return 0; | |
8d80900b | 784 | if (!*d) |
e5329c37 | 785 | return 0; |
8d80900b NB |
786 | num = atoi(d); |
787 | while (isdigit(*d)) | |
788 | d++; | |
789 | if (*d) | |
e5329c37 | 790 | return 0; |
8d80900b NB |
791 | if (nump) *nump = num; |
792 | ||
793 | return type; | |
e5329c37 NB |
794 | } |
795 | ||
4b1ac34b | 796 | unsigned long calc_csum(void *super, int bytes) |
82b27616 | 797 | { |
56eb10c0 | 798 | unsigned long long newcsum = 0; |
82b27616 | 799 | int i; |
4b1ac34b NB |
800 | unsigned int csum; |
801 | unsigned int *superc = (unsigned int*) super; | |
82b27616 | 802 | |
ca3b6696 N |
803 | for(i = 0; i < bytes/4; i++) |
804 | newcsum += superc[i]; | |
82b27616 | 805 | csum = (newcsum& 0xffffffff) + (newcsum>>32); |
570c0542 | 806 | #ifdef __alpha__ |
aba69144 | 807 | /* The in-kernel checksum calculation is always 16bit on |
570c0542 | 808 | * the alpha, though it is 32 bit on i386... |
ca3b6696 | 809 | * I wonder what it is elsewhere... (it uses an API in |
570c0542 NB |
810 | * a way that it shouldn't). |
811 | */ | |
812 | csum = (csum & 0xffff) + (csum >> 16); | |
813 | csum = (csum & 0xffff) + (csum >> 16); | |
814 | #endif | |
82b27616 NB |
815 | return csum; |
816 | } | |
cd29a5c8 | 817 | |
56eb10c0 | 818 | char *human_size(long long bytes) |
cd29a5c8 | 819 | { |
ff9239ee | 820 | static char buf[47]; |
d5d3721e NB |
821 | |
822 | /* We convert bytes to either centi-M{ega,ibi}bytes or | |
823 | * centi-G{igi,ibi}bytes, with appropriate rounding, | |
824 | * and then print 1/100th of those as a decimal. | |
825 | * We allow upto 2048Megabytes before converting to | |
826 | * gigabytes, as that shows more precision and isn't | |
827 | * too large a number. | |
01619b48 | 828 | * Terabytes are not yet handled. |
d5d3721e | 829 | */ |
cd29a5c8 | 830 | |
56eb10c0 | 831 | if (bytes < 5000*1024) |
ca3b6696 | 832 | buf[0] = 0; |
d5d3721e | 833 | else if (bytes < 2*1024LL*1024LL*1024LL) { |
93d3bd3b | 834 | long cMiB = (bytes * 200LL / (1LL<<20) + 1) / 2; |
d5d3721e | 835 | long cMB = (bytes / ( 1000000LL / 200LL ) +1) /2; |
8f23b0b3 | 836 | snprintf(buf, sizeof(buf), " (%ld.%02ld MiB %ld.%02ld MB)", |
efa29530 | 837 | cMiB/100, cMiB % 100, cMB/100, cMB % 100); |
d5d3721e | 838 | } else { |
93d3bd3b | 839 | long cGiB = (bytes * 200LL / (1LL<<30) +1) / 2; |
d5d3721e | 840 | long cGB = (bytes / (1000000000LL/200LL ) +1) /2; |
8f23b0b3 | 841 | snprintf(buf, sizeof(buf), " (%ld.%02ld GiB %ld.%02ld GB)", |
efa29530 | 842 | cGiB/100, cGiB % 100, cGB/100, cGB % 100); |
d5d3721e | 843 | } |
cd29a5c8 NB |
844 | return buf; |
845 | } | |
e0d19036 | 846 | |
f0ec6710 | 847 | char *human_size_brief(long long bytes, int prefix) |
e0d19036 NB |
848 | { |
849 | static char buf[30]; | |
e0d19036 | 850 | |
570abc6f MN |
851 | /* We convert bytes to either centi-M{ega,ibi}bytes or |
852 | * centi-G{igi,ibi}bytes, with appropriate rounding, | |
853 | * and then print 1/100th of those as a decimal. | |
854 | * We allow upto 2048Megabytes before converting to | |
855 | * gigabytes, as that shows more precision and isn't | |
856 | * too large a number. | |
857 | * Terabytes are not yet handled. | |
f0ec6710 MN |
858 | * |
859 | * If prefix == IEC, we mean prefixes like kibi,mebi,gibi etc. | |
860 | * If prefix == JEDEC, we mean prefixes like kilo,mega,giga etc. | |
570abc6f MN |
861 | */ |
862 | ||
e0d19036 | 863 | if (bytes < 5000*1024) |
570abc6f | 864 | buf[0] = 0; |
f0ec6710 MN |
865 | else if (prefix == IEC) { |
866 | if (bytes < 2*1024LL*1024LL*1024LL) { | |
93d3bd3b | 867 | long cMiB = (bytes * 200LL / (1LL<<20) +1) /2; |
f0ec6710 | 868 | snprintf(buf, sizeof(buf), "%ld.%02ldMiB", |
efa29530 | 869 | cMiB/100, cMiB % 100); |
f0ec6710 | 870 | } else { |
93d3bd3b | 871 | long cGiB = (bytes * 200LL / (1LL<<30) +1) /2; |
f0ec6710 | 872 | snprintf(buf, sizeof(buf), "%ld.%02ldGiB", |
efa29530 | 873 | cGiB/100, cGiB % 100); |
f0ec6710 MN |
874 | } |
875 | } | |
876 | else if (prefix == JEDEC) { | |
877 | if (bytes < 2*1024LL*1024LL*1024LL) { | |
878 | long cMB = (bytes / ( 1000000LL / 200LL ) +1) /2; | |
879 | snprintf(buf, sizeof(buf), "%ld.%02ldMB", | |
efa29530 | 880 | cMB/100, cMB % 100); |
f0ec6710 MN |
881 | } else { |
882 | long cGB = (bytes / (1000000000LL/200LL ) +1) /2; | |
883 | snprintf(buf, sizeof(buf), "%ld.%02ldGB", | |
efa29530 | 884 | cGB/100, cGB % 100); |
f0ec6710 | 885 | } |
570abc6f | 886 | } |
f0ec6710 MN |
887 | else |
888 | buf[0] = 0; | |
570abc6f | 889 | |
e0d19036 NB |
890 | return buf; |
891 | } | |
e4965ef8 N |
892 | |
893 | void print_r10_layout(int layout) | |
894 | { | |
895 | int near = layout & 255; | |
896 | int far = (layout >> 8) & 255; | |
897 | int offset = (layout&0x10000); | |
898 | char *sep = ""; | |
899 | ||
900 | if (near != 1) { | |
901 | printf("%s near=%d", sep, near); | |
902 | sep = ","; | |
903 | } | |
904 | if (far != 1) | |
905 | printf("%s %s=%d", sep, offset?"offset":"far", far); | |
906 | if (near*far == 1) | |
907 | printf("NO REDUNDANCY"); | |
908 | } | |
e0d19036 | 909 | |
5f8097be NB |
910 | unsigned long long calc_array_size(int level, int raid_disks, int layout, |
911 | int chunksize, unsigned long long devsize) | |
577e8448 | 912 | { |
e03640bd CA |
913 | if (level == 1) |
914 | return devsize; | |
577e8448 AK |
915 | devsize &= ~(unsigned long long)((chunksize>>9)-1); |
916 | return get_data_disks(level, layout, raid_disks) * devsize; | |
917 | } | |
918 | ||
919 | int get_data_disks(int level, int layout, int raid_disks) | |
5f8097be NB |
920 | { |
921 | int data_disks = 0; | |
922 | switch (level) { | |
ca3b6696 N |
923 | case 0: data_disks = raid_disks; |
924 | break; | |
925 | case 1: data_disks = 1; | |
926 | break; | |
5f8097be | 927 | case 4: |
ca3b6696 N |
928 | case 5: data_disks = raid_disks - 1; |
929 | break; | |
930 | case 6: data_disks = raid_disks - 2; | |
931 | break; | |
5f8097be NB |
932 | case 10: data_disks = raid_disks / (layout & 255) / ((layout>>8)&255); |
933 | break; | |
934 | } | |
577e8448 AK |
935 | |
936 | return data_disks; | |
5f8097be NB |
937 | } |
938 | ||
13db17bd | 939 | dev_t devnm2devid(char *devnm) |
4dd2df09 N |
940 | { |
941 | /* First look in /sys/block/$DEVNM/dev for %d:%d | |
942 | * If that fails, try parsing out a number | |
943 | */ | |
944 | char path[100]; | |
945 | char *ep; | |
946 | int fd; | |
947 | int mjr,mnr; | |
948 | ||
949 | sprintf(path, "/sys/block/%s/dev", devnm); | |
950 | fd = open(path, O_RDONLY); | |
951 | if (fd >= 0) { | |
952 | char buf[20]; | |
953 | int n = read(fd, buf, sizeof(buf)); | |
954 | close(fd); | |
955 | if (n > 0) | |
956 | buf[n] = 0; | |
957 | if (n > 0 && sscanf(buf, "%d:%d\n", &mjr, &mnr) == 2) | |
958 | return makedev(mjr, mnr); | |
959 | } | |
960 | if (strncmp(devnm, "md_d", 4) == 0 && | |
961 | isdigit(devnm[4]) && | |
962 | (mnr = strtoul(devnm+4, &ep, 10)) >= 0 && | |
963 | ep > devnm && *ep == 0) | |
964 | return makedev(get_mdp_major(), mnr << MdpMinorShift); | |
965 | ||
966 | if (strncmp(devnm, "md", 2) == 0 && | |
967 | isdigit(devnm[2]) && | |
968 | (mnr = strtoul(devnm+2, &ep, 10)) >= 0 && | |
969 | ep > devnm && *ep == 0) | |
970 | return makedev(MD_MAJOR, mnr); | |
971 | ||
972 | return 0; | |
973 | } | |
974 | ||
975 | char *get_md_name(char *devnm) | |
e0d19036 NB |
976 | { |
977 | /* find /dev/md%d or /dev/md/%d or make a device /dev/.tmp.md%d */ | |
98c6faba | 978 | /* if dev < 0, want /dev/md/d%d or find mdp in /proc/devices ... */ |
4dd2df09 | 979 | |
e0d19036 NB |
980 | static char devname[50]; |
981 | struct stat stb; | |
4dd2df09 | 982 | dev_t rdev = devnm2devid(devnm); |
dd0781e5 | 983 | char *dn; |
98c6faba | 984 | |
4dd2df09 N |
985 | if (rdev == 0) |
986 | return 0; | |
987 | if (strncmp(devnm, "md_", 3) == 0) { | |
988 | snprintf(devname, sizeof(devname), "/dev/md/%s", | |
989 | devnm + 3); | |
98c6faba NB |
990 | if (stat(devname, &stb) == 0 |
991 | && (S_IFMT&stb.st_mode) == S_IFBLK | |
992 | && (stb.st_rdev == rdev)) | |
993 | return devname; | |
994 | } | |
4dd2df09 N |
995 | snprintf(devname, sizeof(devname), "/dev/%s", devnm); |
996 | if (stat(devname, &stb) == 0 | |
997 | && (S_IFMT&stb.st_mode) == S_IFBLK | |
998 | && (stb.st_rdev == rdev)) | |
999 | return devname; | |
1000 | ||
1001 | snprintf(devname, sizeof(devname), "/dev/md/%s", devnm+2); | |
1002 | if (stat(devname, &stb) == 0 | |
1003 | && (S_IFMT&stb.st_mode) == S_IFBLK | |
1004 | && (stb.st_rdev == rdev)) | |
1005 | return devname; | |
1006 | ||
16c6fa80 | 1007 | dn = map_dev(major(rdev), minor(rdev), 0); |
dd0781e5 NB |
1008 | if (dn) |
1009 | return dn; | |
4dd2df09 | 1010 | snprintf(devname, sizeof(devname), "/dev/.tmp.%s", devnm); |
e0d19036 | 1011 | if (mknod(devname, S_IFBLK | 0600, rdev) == -1) |
dd0781e5 NB |
1012 | if (errno != EEXIST) |
1013 | return NULL; | |
e0d19036 NB |
1014 | |
1015 | if (stat(devname, &stb) == 0 | |
1016 | && (S_IFMT&stb.st_mode) == S_IFBLK | |
1017 | && (stb.st_rdev == rdev)) | |
1018 | return devname; | |
1019 | unlink(devname); | |
1020 | return NULL; | |
1021 | } | |
1022 | ||
1023 | void put_md_name(char *name) | |
1024 | { | |
ca3b6696 | 1025 | if (strncmp(name, "/dev/.tmp.md", 12) == 0) |
e0d19036 NB |
1026 | unlink(name); |
1027 | } | |
f9ce90ba | 1028 | |
cc742d38 N |
1029 | int get_maj_min(char *dev, int *major, int *minor) |
1030 | { | |
1031 | char *e; | |
1032 | *major = strtoul(dev, &e, 0); | |
1033 | return (e > dev && *e == ':' && e[1] && | |
1034 | (*minor = strtoul(e+1, &e, 0)) >= 0 && | |
1035 | *e == 0); | |
1036 | } | |
1037 | ||
8b0dabea NB |
1038 | int dev_open(char *dev, int flags) |
1039 | { | |
1040 | /* like 'open', but if 'dev' matches %d:%d, create a temp | |
1041 | * block device and open that | |
1042 | */ | |
8b0dabea NB |
1043 | int fd = -1; |
1044 | char devname[32]; | |
e81cdd9f | 1045 | int major; |
8b0dabea | 1046 | int minor; |
e81cdd9f | 1047 | |
9f0ad56b JS |
1048 | if (!dev) |
1049 | return -1; | |
6df6a774 | 1050 | flags |= O_DIRECT; |
e81cdd9f | 1051 | |
cc742d38 | 1052 | if (get_maj_min(dev, &major, &minor)) { |
9dc7d357 N |
1053 | snprintf(devname, sizeof(devname), "/dev/.tmp.md.%d:%d:%d", |
1054 | (int)getpid(), major, minor); | |
1055 | if (mknod(devname, S_IFBLK|0600, makedev(major, minor)) == 0) { | |
1056 | fd = open(devname, flags); | |
1057 | unlink(devname); | |
6df6a774 N |
1058 | } |
1059 | if (fd < 0) { | |
9dc7d357 | 1060 | /* Try /tmp as /dev appear to be read-only */ |
6df6a774 N |
1061 | snprintf(devname, sizeof(devname), "/tmp/.tmp.md.%d:%d:%d", |
1062 | (int)getpid(), major, minor); | |
ca3b6696 | 1063 | if (mknod(devname, S_IFBLK|0600, makedev(major, minor)) == 0) { |
6df6a774 N |
1064 | fd = open(devname, flags); |
1065 | unlink(devname); | |
1066 | } | |
8b0dabea NB |
1067 | } |
1068 | } else | |
6df6a774 | 1069 | fd = open(dev, flags); |
8b0dabea NB |
1070 | return fd; |
1071 | } | |
f9ce90ba | 1072 | |
4dd2df09 | 1073 | int open_dev_flags(char *devnm, int flags) |
e8a70c89 | 1074 | { |
13db17bd | 1075 | dev_t devid; |
e8a70c89 N |
1076 | char buf[20]; |
1077 | ||
4dd2df09 N |
1078 | devid = devnm2devid(devnm); |
1079 | sprintf(buf, "%d:%d", major(devid), minor(devid)); | |
d998b738 N |
1080 | return dev_open(buf, flags); |
1081 | } | |
1082 | ||
4dd2df09 | 1083 | int open_dev(char *devnm) |
d998b738 | 1084 | { |
4dd2df09 | 1085 | return open_dev_flags(devnm, O_RDONLY); |
e8a70c89 N |
1086 | } |
1087 | ||
4dd2df09 | 1088 | int open_dev_excl(char *devnm) |
a931db9e NB |
1089 | { |
1090 | char buf[20]; | |
1091 | int i; | |
7187750e | 1092 | int flags = O_RDWR; |
13db17bd | 1093 | dev_t devid = devnm2devid(devnm); |
399e0b97 | 1094 | long delay = 1000; |
a931db9e | 1095 | |
4dd2df09 | 1096 | sprintf(buf, "%d:%d", major(devid), minor(devid)); |
efa29530 | 1097 | for (i = 0; i < 25; i++) { |
7187750e | 1098 | int fd = dev_open(buf, flags|O_EXCL); |
a931db9e NB |
1099 | if (fd >= 0) |
1100 | return fd; | |
7187750e N |
1101 | if (errno == EACCES && flags == O_RDWR) { |
1102 | flags = O_RDONLY; | |
1103 | continue; | |
1104 | } | |
a931db9e NB |
1105 | if (errno != EBUSY) |
1106 | return fd; | |
399e0b97 N |
1107 | usleep(delay); |
1108 | if (delay < 200000) | |
1109 | delay *= 2; | |
a931db9e NB |
1110 | } |
1111 | return -1; | |
1112 | } | |
1113 | ||
9008ed1c N |
1114 | int same_dev(char *one, char *two) |
1115 | { | |
1116 | struct stat st1, st2; | |
1117 | if (stat(one, &st1) != 0) | |
1118 | return 0; | |
1119 | if (stat(two, &st2) != 0) | |
1120 | return 0; | |
1121 | if ((st1.st_mode & S_IFMT) != S_IFBLK) | |
1122 | return 0; | |
1123 | if ((st2.st_mode & S_IFMT) != S_IFBLK) | |
1124 | return 0; | |
1125 | return st1.st_rdev == st2.st_rdev; | |
1126 | } | |
1127 | ||
a7c6e3fb | 1128 | void wait_for(char *dev, int fd) |
a714580e N |
1129 | { |
1130 | int i; | |
a7c6e3fb | 1131 | struct stat stb_want; |
399e0b97 | 1132 | long delay = 1000; |
a7c6e3fb N |
1133 | |
1134 | if (fstat(fd, &stb_want) != 0 || | |
1135 | (stb_want.st_mode & S_IFMT) != S_IFBLK) | |
1136 | return; | |
a714580e | 1137 | |
efa29530 | 1138 | for (i = 0; i < 25; i++) { |
a714580e | 1139 | struct stat stb; |
a7c6e3fb N |
1140 | if (stat(dev, &stb) == 0 && |
1141 | (stb.st_mode & S_IFMT) == S_IFBLK && | |
1142 | (stb.st_rdev == stb_want.st_rdev)) | |
a714580e | 1143 | return; |
399e0b97 N |
1144 | usleep(delay); |
1145 | if (delay < 200000) | |
1146 | delay *= 2; | |
a714580e | 1147 | } |
436305c6 | 1148 | if (i == 25) |
1ade5cc1 | 1149 | dprintf("timeout waiting for %s\n", dev); |
a714580e N |
1150 | } |
1151 | ||
0f22b998 N |
1152 | struct superswitch *superlist[] = |
1153 | { | |
1154 | &super0, &super1, | |
1155 | &super_ddf, &super_imsm, | |
0592faeb | 1156 | &mbr, &gpt, |
32141c17 JS |
1157 | NULL |
1158 | }; | |
f7dd881f | 1159 | |
4725bc31 | 1160 | struct supertype *super_by_fd(int fd, char **subarrayp) |
f9ce90ba | 1161 | { |
1686dc25 NB |
1162 | mdu_array_info_t array; |
1163 | int vers; | |
1164 | int minor; | |
1165 | struct supertype *st = NULL; | |
7e0f6979 | 1166 | struct mdinfo *sra; |
142cb9e1 | 1167 | char *verstr; |
1686dc25 NB |
1168 | char version[20]; |
1169 | int i; | |
f7e7067b | 1170 | char *subarray = NULL; |
4dd2df09 | 1171 | char container[32] = ""; |
1686dc25 | 1172 | |
4dd2df09 | 1173 | sra = sysfs_read(fd, NULL, GET_VERSION); |
1686dc25 NB |
1174 | |
1175 | if (sra) { | |
7e0f6979 NB |
1176 | vers = sra->array.major_version; |
1177 | minor = sra->array.minor_version; | |
142cb9e1 | 1178 | verstr = sra->text_version; |
1686dc25 | 1179 | } else { |
9cd39f01 | 1180 | if (md_get_array_info(fd, &array)) |
1686dc25 NB |
1181 | array.major_version = array.minor_version = 0; |
1182 | vers = array.major_version; | |
1183 | minor = array.minor_version; | |
142cb9e1 | 1184 | verstr = ""; |
6fbba4c9 | 1185 | } |
82d9eba6 | 1186 | |
1686dc25 NB |
1187 | if (vers != -1) { |
1188 | sprintf(version, "%d.%d", vers, minor); | |
1189 | verstr = version; | |
6fbba4c9 | 1190 | } |
3c558363 | 1191 | if (minor == -2 && is_subarray(verstr)) { |
f7e7067b | 1192 | char *dev = verstr+1; |
5f7e44b2 | 1193 | |
f7e7067b | 1194 | subarray = strchr(dev, '/'); |
92d49ecf | 1195 | if (subarray) { |
f7e7067b | 1196 | *subarray++ = '\0'; |
503975b9 | 1197 | subarray = xstrdup(subarray); |
92d49ecf | 1198 | } |
4dd2df09 | 1199 | strcpy(container, dev); |
15d230f7 | 1200 | sysfs_free(sra); |
5f7e44b2 | 1201 | sra = sysfs_read(-1, container, GET_VERSION); |
603f24a0 N |
1202 | if (sra && sra->text_version[0]) |
1203 | verstr = sra->text_version; | |
1204 | else | |
1205 | verstr = "-no-metadata-"; | |
f7e7067b NB |
1206 | } |
1207 | ||
efa29530 | 1208 | for (i = 0; st == NULL && superlist[i]; i++) |
f7e7067b | 1209 | st = superlist[i]->match_metadata_desc(verstr); |
1686dc25 | 1210 | |
15d230f7 | 1211 | sysfs_free(sra); |
f7e7067b | 1212 | if (st) { |
3b0896f8 | 1213 | st->sb = NULL; |
1f49fb3a N |
1214 | if (subarrayp) |
1215 | *subarrayp = subarray; | |
4dd2df09 N |
1216 | strcpy(st->container_devnm, container); |
1217 | strcpy(st->devnm, fd2devnm(fd)); | |
4725bc31 N |
1218 | } else |
1219 | free(subarray); | |
5f7e44b2 | 1220 | |
82d9eba6 | 1221 | return st; |
f9ce90ba | 1222 | } |
ea24acd0 | 1223 | |
0f0749ad | 1224 | int dev_size_from_id(dev_t id, unsigned long long *size) |
52d5d101 AC |
1225 | { |
1226 | char buf[20]; | |
1227 | int fd; | |
1228 | ||
1229 | sprintf(buf, "%d:%d", major(id), minor(id)); | |
1230 | fd = dev_open(buf, O_RDONLY); | |
1231 | if (fd < 0) | |
1232 | return 0; | |
1233 | if (get_dev_size(fd, NULL, size)) { | |
1234 | close(fd); | |
1235 | return 1; | |
1236 | } | |
1237 | close(fd); | |
1238 | return 0; | |
1239 | } | |
f9ce90ba | 1240 | |
159c3a1a | 1241 | struct supertype *dup_super(struct supertype *orig) |
3da92f27 | 1242 | { |
159c3a1a | 1243 | struct supertype *st; |
1686dc25 | 1244 | |
d2ca6449 NB |
1245 | if (!orig) |
1246 | return orig; | |
503975b9 | 1247 | st = xcalloc(1, sizeof(*st)); |
159c3a1a NB |
1248 | st->ss = orig->ss; |
1249 | st->max_devs = orig->max_devs; | |
1250 | st->minor_version = orig->minor_version; | |
cb8f6859 | 1251 | st->ignore_hw_compat = orig->ignore_hw_compat; |
23bf42cc | 1252 | st->data_offset = orig->data_offset; |
159c3a1a NB |
1253 | st->sb = NULL; |
1254 | st->info = NULL; | |
1255 | return st; | |
3da92f27 NB |
1256 | } |
1257 | ||
54887ad8 | 1258 | struct supertype *guess_super_type(int fd, enum guess_types guess_type) |
f9ce90ba NB |
1259 | { |
1260 | /* try each load_super to find the best match, | |
1261 | * and return the best superswitch | |
1262 | */ | |
82d9eba6 NB |
1263 | struct superswitch *ss; |
1264 | struct supertype *st; | |
1d13b599 | 1265 | unsigned int besttime = 0; |
570c0542 | 1266 | int bestsuper = -1; |
f9ce90ba NB |
1267 | int i; |
1268 | ||
503975b9 | 1269 | st = xcalloc(1, sizeof(*st)); |
4dd2df09 | 1270 | st->container_devnm[0] = 0; |
d1d599ea | 1271 | |
efa29530 | 1272 | for (i = 0; superlist[i]; i++) { |
f9ce90ba NB |
1273 | int rv; |
1274 | ss = superlist[i]; | |
54887ad8 N |
1275 | if (guess_type == guess_array && ss->add_to_super == NULL) |
1276 | continue; | |
1277 | if (guess_type == guess_partitions && ss->add_to_super != NULL) | |
1278 | continue; | |
ef609477 | 1279 | memset(st, 0, sizeof(*st)); |
df3346e6 | 1280 | st->ignore_hw_compat = 1; |
3da92f27 | 1281 | rv = ss->load_super(st, fd, NULL); |
570c0542 NB |
1282 | if (rv == 0) { |
1283 | struct mdinfo info; | |
a5d85af7 | 1284 | st->ss->getinfo_super(st, &info, NULL); |
570c0542 NB |
1285 | if (bestsuper == -1 || |
1286 | besttime < info.array.ctime) { | |
1287 | bestsuper = i; | |
1288 | besttime = info.array.ctime; | |
570c0542 | 1289 | } |
3da92f27 | 1290 | ss->free_super(st); |
570c0542 NB |
1291 | } |
1292 | } | |
1293 | if (bestsuper != -1) { | |
1294 | int rv; | |
ef609477 | 1295 | memset(st, 0, sizeof(*st)); |
df3346e6 | 1296 | st->ignore_hw_compat = 1; |
3da92f27 | 1297 | rv = superlist[bestsuper]->load_super(st, fd, NULL); |
f9ce90ba | 1298 | if (rv == 0) { |
5e747af2 | 1299 | superlist[bestsuper]->free_super(st); |
82d9eba6 | 1300 | return st; |
f9ce90ba NB |
1301 | } |
1302 | } | |
570c0542 | 1303 | free(st); |
f9ce90ba NB |
1304 | return NULL; |
1305 | } | |
fe6729fa | 1306 | |
beae1dfe NB |
1307 | /* Return size of device in bytes */ |
1308 | int get_dev_size(int fd, char *dname, unsigned long long *sizep) | |
1309 | { | |
1310 | unsigned long long ldsize; | |
c2c9bb6f NB |
1311 | struct stat st; |
1312 | ||
1313 | if (fstat(fd, &st) != -1 && S_ISREG(st.st_mode)) | |
1314 | ldsize = (unsigned long long)st.st_size; | |
1315 | else | |
beae1dfe NB |
1316 | #ifdef BLKGETSIZE64 |
1317 | if (ioctl(fd, BLKGETSIZE64, &ldsize) != 0) | |
1318 | #endif | |
1319 | { | |
1320 | unsigned long dsize; | |
1321 | if (ioctl(fd, BLKGETSIZE, &dsize) == 0) { | |
1322 | ldsize = dsize; | |
1323 | ldsize <<= 9; | |
1324 | } else { | |
1325 | if (dname) | |
32971509 | 1326 | pr_err("Cannot get size of %s: %s\n", |
beae1dfe NB |
1327 | dname, strerror(errno)); |
1328 | return 0; | |
1329 | } | |
1330 | } | |
1331 | *sizep = ldsize; | |
1332 | return 1; | |
1333 | } | |
8fac0577 | 1334 | |
32971509 PB |
1335 | /* Return sector size of device in bytes */ |
1336 | int get_dev_sector_size(int fd, char *dname, unsigned int *sectsizep) | |
1337 | { | |
1338 | unsigned int sectsize; | |
1339 | ||
1340 | if (ioctl(fd, BLKSSZGET, §size) != 0) { | |
1341 | if (dname) | |
1342 | pr_err("Cannot get sector size of %s: %s\n", | |
1343 | dname, strerror(errno)); | |
1344 | return 0; | |
1345 | } | |
1346 | ||
1347 | *sectsizep = sectsize; | |
1348 | return 1; | |
1349 | } | |
1350 | ||
3a371610 N |
1351 | /* Return true if this can only be a container, not a member device. |
1352 | * i.e. is and md device and size is zero | |
1353 | */ | |
1354 | int must_be_container(int fd) | |
1355 | { | |
f5c924f4 | 1356 | struct mdinfo *mdi; |
3a371610 | 1357 | unsigned long long size; |
f5c924f4 JS |
1358 | |
1359 | mdi = sysfs_read(fd, NULL, GET_VERSION); | |
1360 | if (!mdi) | |
3a371610 | 1361 | return 0; |
f5c924f4 JS |
1362 | sysfs_free(mdi); |
1363 | ||
3a371610 N |
1364 | if (get_dev_size(fd, NULL, &size) == 0) |
1365 | return 1; | |
1366 | if (size == 0) | |
1367 | return 1; | |
1368 | return 0; | |
1369 | } | |
034b203a TM |
1370 | |
1371 | /* Sets endofpart parameter to the last block used by the last GPT partition on the device. | |
1372 | * Returns: 1 if successful | |
1373 | * -1 for unknown partition type | |
1374 | * 0 for other errors | |
1375 | */ | |
1376 | static int get_gpt_last_partition_end(int fd, unsigned long long *endofpart) | |
1377 | { | |
056b331e | 1378 | struct GPT gpt; |
034b203a | 1379 | unsigned char empty_gpt_entry[16]= {0}; |
db7fdfe4 JS |
1380 | struct GPT_part_entry *part; |
1381 | char buf[512]; | |
034b203a TM |
1382 | unsigned long long curr_part_end; |
1383 | unsigned all_partitions, entry_size; | |
f21e18ca | 1384 | unsigned part_nr; |
41b06495 | 1385 | unsigned int sector_size = 0; |
034b203a TM |
1386 | |
1387 | *endofpart = 0; | |
1388 | ||
056b331e | 1389 | BUILD_BUG_ON(sizeof(gpt) != 512); |
73e658d8 | 1390 | /* skip protective MBR */ |
41b06495 MD |
1391 | if (!get_dev_sector_size(fd, NULL, §or_size)) |
1392 | return 0; | |
1393 | lseek(fd, sector_size, SEEK_SET); | |
73e658d8 | 1394 | /* read GPT header */ |
056b331e | 1395 | if (read(fd, &gpt, 512) != 512) |
034b203a TM |
1396 | return 0; |
1397 | ||
1398 | /* get the number of partition entries and the entry size */ | |
056b331e N |
1399 | all_partitions = __le32_to_cpu(gpt.part_cnt); |
1400 | entry_size = __le32_to_cpu(gpt.part_size); | |
034b203a TM |
1401 | |
1402 | /* Check GPT signature*/ | |
056b331e | 1403 | if (gpt.magic != GPT_SIGNATURE_MAGIC) |
034b203a TM |
1404 | return -1; |
1405 | ||
1406 | /* sanity checks */ | |
1407 | if (all_partitions > 1024 || | |
db7fdfe4 | 1408 | entry_size > sizeof(buf)) |
034b203a TM |
1409 | return -1; |
1410 | ||
db7fdfe4 JS |
1411 | part = (struct GPT_part_entry *)buf; |
1412 | ||
41b06495 MD |
1413 | /* set offset to third block (GPT entries) */ |
1414 | lseek(fd, sector_size*2, SEEK_SET); | |
ca3b6696 | 1415 | for (part_nr = 0; part_nr < all_partitions; part_nr++) { |
73e658d8 | 1416 | /* read partition entry */ |
db7fdfe4 | 1417 | if (read(fd, buf, entry_size) != (ssize_t)entry_size) |
73e658d8 LB |
1418 | return 0; |
1419 | ||
034b203a | 1420 | /* is this valid partition? */ |
db7fdfe4 | 1421 | if (memcmp(part->type_guid, empty_gpt_entry, 16) != 0) { |
034b203a | 1422 | /* check the last lba for the current partition */ |
db7fdfe4 | 1423 | curr_part_end = __le64_to_cpu(part->ending_lba); |
034b203a TM |
1424 | if (curr_part_end > *endofpart) |
1425 | *endofpart = curr_part_end; | |
1426 | } | |
1427 | ||
034b203a TM |
1428 | } |
1429 | return 1; | |
1430 | } | |
1431 | ||
1432 | /* Sets endofpart parameter to the last block used by the last partition on the device. | |
1433 | * Returns: 1 if successful | |
1434 | * -1 for unknown partition type | |
1435 | * 0 for other errors | |
1436 | */ | |
1437 | static int get_last_partition_end(int fd, unsigned long long *endofpart) | |
1438 | { | |
056b331e | 1439 | struct MBR boot_sect; |
034b203a | 1440 | unsigned long long curr_part_end; |
f21e18ca | 1441 | unsigned part_nr; |
31208db9 | 1442 | unsigned int sector_size; |
034b203a TM |
1443 | int retval = 0; |
1444 | ||
1445 | *endofpart = 0; | |
1446 | ||
056b331e | 1447 | BUILD_BUG_ON(sizeof(boot_sect) != 512); |
034b203a TM |
1448 | /* read MBR */ |
1449 | lseek(fd, 0, 0); | |
056b331e | 1450 | if (read(fd, &boot_sect, 512) != 512) |
034b203a TM |
1451 | goto abort; |
1452 | ||
1453 | /* check MBP signature */ | |
056b331e | 1454 | if (boot_sect.magic == MBR_SIGNATURE_MAGIC) { |
034b203a TM |
1455 | retval = 1; |
1456 | /* found the correct signature */ | |
034b203a | 1457 | |
ca3b6696 | 1458 | for (part_nr = 0; part_nr < MBR_PARTITIONS; part_nr++) { |
8e2bca51 JC |
1459 | /* |
1460 | * Have to make every access through boot_sect rather | |
1461 | * than using a pointer to the partition table (or an | |
1462 | * entry), since the entries are not properly aligned. | |
1463 | */ | |
1464 | ||
034b203a | 1465 | /* check for GPT type */ |
8e2bca51 JC |
1466 | if (boot_sect.parts[part_nr].part_type == |
1467 | MBR_GPT_PARTITION_TYPE) { | |
034b203a TM |
1468 | retval = get_gpt_last_partition_end(fd, endofpart); |
1469 | break; | |
1470 | } | |
1471 | /* check the last used lba for the current partition */ | |
8e2bca51 JC |
1472 | curr_part_end = |
1473 | __le32_to_cpu(boot_sect.parts[part_nr].first_sect_lba) + | |
1474 | __le32_to_cpu(boot_sect.parts[part_nr].blocks_num); | |
034b203a TM |
1475 | if (curr_part_end > *endofpart) |
1476 | *endofpart = curr_part_end; | |
034b203a TM |
1477 | } |
1478 | } else { | |
1479 | /* Unknown partition table */ | |
1480 | retval = -1; | |
1481 | } | |
31208db9 MD |
1482 | /* calculate number of 512-byte blocks */ |
1483 | if (get_dev_sector_size(fd, NULL, §or_size)) | |
1484 | *endofpart *= (sector_size / 512); | |
034b203a TM |
1485 | abort: |
1486 | return retval; | |
1487 | } | |
1488 | ||
53ed6ac3 KW |
1489 | int check_partitions(int fd, char *dname, unsigned long long freesize, |
1490 | unsigned long long size) | |
034b203a TM |
1491 | { |
1492 | /* | |
1493 | * Check where the last partition ends | |
1494 | */ | |
1495 | unsigned long long endofpart; | |
034b203a | 1496 | |
31208db9 | 1497 | if (get_last_partition_end(fd, &endofpart) > 0) { |
034b203a TM |
1498 | /* There appears to be a partition table here */ |
1499 | if (freesize == 0) { | |
1500 | /* partitions will not be visible in new device */ | |
e7b84f9d N |
1501 | pr_err("partition table exists on %s but will be lost or\n" |
1502 | " meaningless after creating array\n", | |
1503 | dname); | |
034b203a TM |
1504 | return 1; |
1505 | } else if (endofpart > freesize) { | |
1506 | /* last partition overlaps metadata */ | |
e7b84f9d N |
1507 | pr_err("metadata will over-write last partition on %s.\n", |
1508 | dname); | |
034b203a | 1509 | return 1; |
53ed6ac3 KW |
1510 | } else if (size && endofpart > size) { |
1511 | /* partitions will be truncated in new device */ | |
e7b84f9d N |
1512 | pr_err("array size is too small to cover all partitions on %s.\n", |
1513 | dname); | |
53ed6ac3 | 1514 | return 1; |
034b203a TM |
1515 | } |
1516 | } | |
1517 | return 0; | |
1518 | } | |
1519 | ||
a322f70c DW |
1520 | int open_container(int fd) |
1521 | { | |
1522 | /* 'fd' is a block device. Find out if it is in use | |
1523 | * by a container, and return an open fd on that container. | |
1524 | */ | |
1525 | char path[256]; | |
1526 | char *e; | |
1527 | DIR *dir; | |
1528 | struct dirent *de; | |
1529 | int dfd, n; | |
1530 | char buf[200]; | |
1531 | int major, minor; | |
1532 | struct stat st; | |
1533 | ||
1534 | if (fstat(fd, &st) != 0) | |
1535 | return -1; | |
1536 | sprintf(path, "/sys/dev/block/%d:%d/holders", | |
1537 | (int)major(st.st_rdev), (int)minor(st.st_rdev)); | |
1538 | e = path + strlen(path); | |
1539 | ||
1540 | dir = opendir(path); | |
1541 | if (!dir) | |
1542 | return -1; | |
1543 | while ((de = readdir(dir))) { | |
1544 | if (de->d_ino == 0) | |
1545 | continue; | |
1546 | if (de->d_name[0] == '.') | |
1547 | continue; | |
a994592d N |
1548 | /* Need to make sure it is a container and not a volume */ |
1549 | sprintf(e, "/%s/md/metadata_version", de->d_name); | |
1550 | dfd = open(path, O_RDONLY); | |
1551 | if (dfd < 0) | |
1552 | continue; | |
1553 | n = read(dfd, buf, sizeof(buf)); | |
1554 | close(dfd); | |
1555 | if (n <= 0 || (unsigned)n >= sizeof(buf)) | |
1556 | continue; | |
1557 | buf[n] = 0; | |
1558 | if (strncmp(buf, "external", 8) != 0 || | |
1559 | n < 10 || | |
1560 | buf[9] == '/') | |
1561 | continue; | |
a322f70c DW |
1562 | sprintf(e, "/%s/dev", de->d_name); |
1563 | dfd = open(path, O_RDONLY); | |
1564 | if (dfd < 0) | |
1565 | continue; | |
1566 | n = read(dfd, buf, sizeof(buf)); | |
1567 | close(dfd); | |
f21e18ca | 1568 | if (n <= 0 || (unsigned)n >= sizeof(buf)) |
a322f70c DW |
1569 | continue; |
1570 | buf[n] = 0; | |
1571 | if (sscanf(buf, "%d:%d", &major, &minor) != 2) | |
1572 | continue; | |
1573 | sprintf(buf, "%d:%d", major, minor); | |
1574 | dfd = dev_open(buf, O_RDONLY); | |
1575 | if (dfd >= 0) { | |
1576 | closedir(dir); | |
1577 | return dfd; | |
1578 | } | |
1579 | } | |
355726fa | 1580 | closedir(dir); |
a322f70c DW |
1581 | return -1; |
1582 | } | |
1583 | ||
33414a01 DW |
1584 | struct superswitch *version_to_superswitch(char *vers) |
1585 | { | |
1586 | int i; | |
1587 | ||
1588 | for (i = 0; superlist[i]; i++) { | |
1589 | struct superswitch *ss = superlist[i]; | |
1590 | ||
1591 | if (strcmp(vers, ss->name) == 0) | |
1592 | return ss; | |
1593 | } | |
1594 | ||
1595 | return NULL; | |
1596 | } | |
1597 | ||
4dd2df09 N |
1598 | int metadata_container_matches(char *metadata, char *devnm) |
1599 | { | |
1600 | /* Check if 'devnm' is the container named in 'metadata' | |
1601 | * which is | |
1602 | * /containername/componentname or | |
1603 | * -containername/componentname | |
1604 | */ | |
1605 | int l; | |
1606 | if (*metadata != '/' && *metadata != '-') | |
1607 | return 0; | |
1608 | l = strlen(devnm); | |
1609 | if (strncmp(metadata+1, devnm, l) != 0) | |
1610 | return 0; | |
1611 | if (metadata[l+1] != '/') | |
1612 | return 0; | |
1613 | return 1; | |
1614 | } | |
1615 | ||
1616 | int metadata_subdev_matches(char *metadata, char *devnm) | |
1617 | { | |
1618 | /* Check if 'devnm' is the subdev named in 'metadata' | |
1619 | * which is | |
1620 | * /containername/subdev or | |
1621 | * -containername/subdev | |
1622 | */ | |
1623 | char *sl; | |
1624 | if (*metadata != '/' && *metadata != '-') | |
1625 | return 0; | |
1626 | sl = strchr(metadata+1, '/'); | |
1627 | if (!sl) | |
1628 | return 0; | |
1629 | if (strcmp(sl+1, devnm) == 0) | |
1630 | return 1; | |
1631 | return 0; | |
1632 | } | |
1633 | ||
33414a01 DW |
1634 | int is_container_member(struct mdstat_ent *mdstat, char *container) |
1635 | { | |
1636 | if (mdstat->metadata_version == NULL || | |
1637 | strncmp(mdstat->metadata_version, "external:", 9) != 0 || | |
4dd2df09 | 1638 | !metadata_container_matches(mdstat->metadata_version+9, container)) |
33414a01 DW |
1639 | return 0; |
1640 | ||
1641 | return 1; | |
1642 | } | |
1643 | ||
1644 | int is_subarray_active(char *subarray, char *container) | |
1645 | { | |
1646 | struct mdstat_ent *mdstat = mdstat_read(0, 0); | |
1647 | struct mdstat_ent *ent; | |
1648 | ||
e5408a32 DW |
1649 | for (ent = mdstat; ent; ent = ent->next) |
1650 | if (is_container_member(ent, container)) | |
e5e5d7ce | 1651 | if (strcmp(to_subarray(ent, container), subarray) == 0) |
33414a01 | 1652 | break; |
33414a01 DW |
1653 | |
1654 | free_mdstat(mdstat); | |
1655 | ||
1656 | return ent != NULL; | |
1657 | } | |
1658 | ||
1659 | /* open_subarray - opens a subarray in a container | |
1660 | * @dev: container device name | |
feab51f8 | 1661 | * @st: empty supertype |
33414a01 DW |
1662 | * @quiet: block reporting errors flag |
1663 | * | |
1664 | * On success returns an fd to a container and fills in *st | |
1665 | */ | |
feab51f8 | 1666 | int open_subarray(char *dev, char *subarray, struct supertype *st, int quiet) |
33414a01 DW |
1667 | { |
1668 | struct mdinfo *mdi; | |
a951a4f7 | 1669 | struct mdinfo *info; |
33414a01 | 1670 | int fd, err = 1; |
4dd2df09 | 1671 | char *_devnm; |
33414a01 DW |
1672 | |
1673 | fd = open(dev, O_RDWR|O_EXCL); | |
1674 | if (fd < 0) { | |
1675 | if (!quiet) | |
e7b84f9d | 1676 | pr_err("Couldn't open %s, aborting\n", |
33414a01 | 1677 | dev); |
b990032d | 1678 | return -1; |
33414a01 DW |
1679 | } |
1680 | ||
4dd2df09 N |
1681 | _devnm = fd2devnm(fd); |
1682 | if (_devnm == NULL) { | |
33414a01 | 1683 | if (!quiet) |
e7b84f9d N |
1684 | pr_err("Failed to determine device number for %s\n", |
1685 | dev); | |
33414a01 DW |
1686 | goto close_fd; |
1687 | } | |
4dd2df09 | 1688 | strcpy(st->devnm, _devnm); |
33414a01 | 1689 | |
4dd2df09 | 1690 | mdi = sysfs_read(fd, st->devnm, GET_VERSION|GET_LEVEL); |
33414a01 DW |
1691 | if (!mdi) { |
1692 | if (!quiet) | |
e7b84f9d | 1693 | pr_err("Failed to read sysfs for %s\n", |
33414a01 DW |
1694 | dev); |
1695 | goto close_fd; | |
1696 | } | |
1697 | ||
1698 | if (mdi->array.level != UnSet) { | |
1699 | if (!quiet) | |
e7b84f9d | 1700 | pr_err("%s is not a container\n", dev); |
33414a01 DW |
1701 | goto free_sysfs; |
1702 | } | |
1703 | ||
1704 | st->ss = version_to_superswitch(mdi->text_version); | |
1705 | if (!st->ss) { | |
1706 | if (!quiet) | |
e7b84f9d N |
1707 | pr_err("Operation not supported for %s metadata\n", |
1708 | mdi->text_version); | |
33414a01 DW |
1709 | goto free_sysfs; |
1710 | } | |
1711 | ||
4dd2df09 | 1712 | if (st->devnm[0] == 0) { |
33414a01 | 1713 | if (!quiet) |
e7b84f9d | 1714 | pr_err("Failed to allocate device name\n"); |
33414a01 DW |
1715 | goto free_sysfs; |
1716 | } | |
1717 | ||
db20d413 | 1718 | if (!st->ss->load_container) { |
33414a01 | 1719 | if (!quiet) |
e7b84f9d | 1720 | pr_err("%s is not a container\n", dev); |
4dd2df09 | 1721 | goto free_sysfs; |
33414a01 DW |
1722 | } |
1723 | ||
db20d413 | 1724 | if (st->ss->load_container(st, fd, NULL)) { |
33414a01 | 1725 | if (!quiet) |
e7b84f9d | 1726 | pr_err("Failed to load metadata for %s\n", |
db20d413 | 1727 | dev); |
4dd2df09 | 1728 | goto free_sysfs; |
33414a01 DW |
1729 | } |
1730 | ||
a951a4f7 N |
1731 | info = st->ss->container_content(st, subarray); |
1732 | if (!info) { | |
1733 | if (!quiet) | |
e7b84f9d | 1734 | pr_err("Failed to find subarray-%s in %s\n", |
a951a4f7 N |
1735 | subarray, dev); |
1736 | goto free_super; | |
1737 | } | |
1738 | free(info); | |
1739 | ||
33414a01 DW |
1740 | err = 0; |
1741 | ||
1742 | free_super: | |
1743 | if (err) | |
1744 | st->ss->free_super(st); | |
33414a01 DW |
1745 | free_sysfs: |
1746 | sysfs_free(mdi); | |
1747 | close_fd: | |
1748 | if (err) | |
1749 | close(fd); | |
1750 | ||
1751 | if (err) | |
1752 | return -1; | |
1753 | else | |
1754 | return fd; | |
1755 | } | |
1756 | ||
7801ac20 N |
1757 | int add_disk(int mdfd, struct supertype *st, |
1758 | struct mdinfo *sra, struct mdinfo *info) | |
1759 | { | |
1760 | /* Add a device to an array, in one of 2 ways. */ | |
1761 | int rv; | |
32141c17 | 1762 | |
7801ac20 | 1763 | if (st->ss->external) { |
d23534e4 DW |
1764 | if (info->disk.state & (1<<MD_DISK_SYNC)) |
1765 | info->recovery_start = MaxSector; | |
1766 | else | |
1767 | info->recovery_start = 0; | |
2904b26f | 1768 | rv = sysfs_add_disk(sra, info, 0); |
7801ac20 N |
1769 | if (! rv) { |
1770 | struct mdinfo *sd2; | |
f35f2525 N |
1771 | for (sd2 = sra->devs; sd2; sd2=sd2->next) |
1772 | if (sd2 == info) | |
1773 | break; | |
1774 | if (sd2 == NULL) { | |
503975b9 | 1775 | sd2 = xmalloc(sizeof(*sd2)); |
f35f2525 N |
1776 | *sd2 = *info; |
1777 | sd2->next = sra->devs; | |
1778 | sra->devs = sd2; | |
1779 | } | |
7801ac20 N |
1780 | } |
1781 | } else | |
7801ac20 N |
1782 | rv = ioctl(mdfd, ADD_NEW_DISK, &info->disk); |
1783 | return rv; | |
1784 | } | |
1785 | ||
de6ae750 N |
1786 | int remove_disk(int mdfd, struct supertype *st, |
1787 | struct mdinfo *sra, struct mdinfo *info) | |
1788 | { | |
1789 | int rv; | |
32141c17 | 1790 | |
de6ae750 | 1791 | /* Remove the disk given by 'info' from the array */ |
de6ae750 N |
1792 | if (st->ss->external) |
1793 | rv = sysfs_set_str(sra, info, "slot", "none"); | |
1794 | else | |
de6ae750 N |
1795 | rv = ioctl(mdfd, HOT_REMOVE_DISK, makedev(info->disk.major, |
1796 | info->disk.minor)); | |
1797 | return rv; | |
1798 | } | |
1799 | ||
1ab9ed2a | 1800 | int hot_remove_disk(int mdfd, unsigned long dev, int force) |
2dd271fe | 1801 | { |
1ab9ed2a | 1802 | int cnt = force ? 500 : 5; |
2dd271fe N |
1803 | int ret; |
1804 | ||
1805 | /* HOT_REMOVE_DISK can fail with EBUSY if there are | |
1806 | * outstanding IO requests to the device. | |
1807 | * In this case, it can be helpful to wait a little while, | |
1ab9ed2a | 1808 | * up to 5 seconds if 'force' is set, or 50 msec if not. |
2dd271fe N |
1809 | */ |
1810 | while ((ret = ioctl(mdfd, HOT_REMOVE_DISK, dev)) == -1 && | |
1811 | errno == EBUSY && | |
1812 | cnt-- > 0) | |
1813 | usleep(10000); | |
1814 | ||
1815 | return ret; | |
1816 | } | |
1817 | ||
1ab9ed2a | 1818 | int sys_hot_remove_disk(int statefd, int force) |
fdd01569 | 1819 | { |
1ab9ed2a | 1820 | int cnt = force ? 500 : 5; |
fdd01569 N |
1821 | int ret; |
1822 | ||
1823 | while ((ret = write(statefd, "remove", 6)) == -1 && | |
1824 | errno == EBUSY && | |
1825 | cnt-- > 0) | |
1826 | usleep(10000); | |
1827 | return ret == 6 ? 0 : -1; | |
1828 | } | |
1829 | ||
f35f2525 N |
1830 | int set_array_info(int mdfd, struct supertype *st, struct mdinfo *info) |
1831 | { | |
1832 | /* Initialise kernel's knowledge of array. | |
1833 | * This varies between externally managed arrays | |
1834 | * and older kernels | |
1835 | */ | |
700483a2 | 1836 | mdu_array_info_t inf; |
f35f2525 N |
1837 | int rv; |
1838 | ||
f35f2525 | 1839 | if (st->ss->external) |
700483a2 | 1840 | return sysfs_set_array(info, 9003); |
700483a2 JS |
1841 | |
1842 | memset(&inf, 0, sizeof(inf)); | |
1843 | inf.major_version = info->array.major_version; | |
1844 | inf.minor_version = info->array.minor_version; | |
1845 | rv = md_set_array_info(mdfd, &inf); | |
1846 | ||
f35f2525 N |
1847 | return rv; |
1848 | } | |
1849 | ||
1e5c6983 DW |
1850 | unsigned long long min_recovery_start(struct mdinfo *array) |
1851 | { | |
1852 | /* find the minimum recovery_start in an array for metadata | |
1853 | * formats that only record per-array recovery progress instead | |
1854 | * of per-device | |
1855 | */ | |
1856 | unsigned long long recovery_start = MaxSector; | |
1857 | struct mdinfo *d; | |
1858 | ||
1859 | for (d = array->devs; d; d = d->next) | |
1860 | recovery_start = min(recovery_start, d->recovery_start); | |
1861 | ||
1862 | return recovery_start; | |
1863 | } | |
1864 | ||
4dd2df09 | 1865 | int mdmon_pid(char *devnm) |
a931db9e NB |
1866 | { |
1867 | char path[100]; | |
1868 | char pid[10]; | |
1869 | int fd; | |
1870 | int n; | |
10013317 | 1871 | |
4dd2df09 | 1872 | sprintf(path, "%s/%s.pid", MDMON_DIR, devnm); |
10013317 | 1873 | |
24f6f99b | 1874 | fd = open(path, O_RDONLY | O_NOATIME, 0); |
a931db9e NB |
1875 | |
1876 | if (fd < 0) | |
cf556303 | 1877 | return -1; |
a931db9e NB |
1878 | n = read(fd, pid, 9); |
1879 | close(fd); | |
1880 | if (n <= 0) | |
cf556303 | 1881 | return -1; |
24f6f99b | 1882 | return atoi(pid); |
a931db9e NB |
1883 | } |
1884 | ||
4dd2df09 | 1885 | int mdmon_running(char *devnm) |
a931db9e | 1886 | { |
4dd2df09 | 1887 | int pid = mdmon_pid(devnm); |
24f6f99b | 1888 | if (pid <= 0) |
a931db9e | 1889 | return 0; |
24f6f99b | 1890 | if (kill(pid, 0) == 0) |
a931db9e NB |
1891 | return 1; |
1892 | return 0; | |
1893 | } | |
1894 | ||
4dd2df09 | 1895 | int start_mdmon(char *devnm) |
8850ee3e | 1896 | { |
1913c325 | 1897 | int i, skipped; |
44d2e365 | 1898 | int len; |
ca3b6696 | 1899 | pid_t pid; |
9fe32043 | 1900 | int status; |
44d2e365 N |
1901 | char pathbuf[1024]; |
1902 | char *paths[4] = { | |
1903 | pathbuf, | |
85945e19 | 1904 | BINDIR "/mdmon", |
2f1bcf43 | 1905 | "./mdmon", |
44d2e365 N |
1906 | NULL |
1907 | }; | |
8850ee3e | 1908 | |
40ebbb9c | 1909 | if (check_env("MDADM_NO_MDMON")) |
8850ee3e N |
1910 | return 0; |
1911 | ||
9cf014ec | 1912 | len = readlink("/proc/self/exe", pathbuf, sizeof(pathbuf)-1); |
44d2e365 N |
1913 | if (len > 0) { |
1914 | char *sl; | |
1915 | pathbuf[len] = 0; | |
1916 | sl = strrchr(pathbuf, '/'); | |
1917 | if (sl) | |
1918 | sl++; | |
1919 | else | |
1920 | sl = pathbuf; | |
1921 | strcpy(sl, "mdmon"); | |
1922 | } else | |
1923 | pathbuf[0] = '\0'; | |
1924 | ||
0f7bdf89 | 1925 | /* First try to run systemctl */ |
9540cc24 N |
1926 | if (!check_env("MDADM_NO_SYSTEMCTL")) |
1927 | switch(fork()) { | |
1928 | case 0: | |
1929 | /* FIXME yuk. CLOSE_EXEC?? */ | |
1930 | skipped = 0; | |
1931 | for (i = 3; skipped < 20; i++) | |
1932 | if (close(i) < 0) | |
1933 | skipped++; | |
1934 | else | |
1935 | skipped = 0; | |
1936 | ||
1937 | /* Don't want to see error messages from | |
1938 | * systemctl. If the service doesn't exist, | |
1939 | * we start mdmon ourselves. | |
1940 | */ | |
1941 | close(2); | |
1942 | open("/dev/null", O_WRONLY); | |
1943 | snprintf(pathbuf, sizeof(pathbuf), "mdmon@%s.service", | |
1944 | devnm); | |
1945 | status = execl("/usr/bin/systemctl", "systemctl", | |
1946 | "start", | |
1947 | pathbuf, NULL); | |
1948 | status = execl("/bin/systemctl", "systemctl", "start", | |
1949 | pathbuf, NULL); | |
1950 | exit(1); | |
7a862a02 | 1951 | case -1: pr_err("cannot run mdmon. Array remains readonly\n"); |
9540cc24 N |
1952 | return -1; |
1953 | default: /* parent - good */ | |
1954 | pid = wait(&status); | |
1955 | if (pid >= 0 && status == 0) | |
1956 | return 0; | |
1957 | } | |
0f7bdf89 JS |
1958 | |
1959 | /* That failed, try running mdmon directly */ | |
8850ee3e N |
1960 | switch(fork()) { |
1961 | case 0: | |
1962 | /* FIXME yuk. CLOSE_EXEC?? */ | |
1913c325 | 1963 | skipped = 0; |
ca3b6696 | 1964 | for (i = 3; skipped < 20; i++) |
1913c325 N |
1965 | if (close(i) < 0) |
1966 | skipped++; | |
1967 | else | |
1968 | skipped = 0; | |
1969 | ||
ca3b6696 | 1970 | for (i = 0; paths[i]; i++) |
a0963a86 | 1971 | if (paths[i][0]) { |
2f1bcf43 | 1972 | execl(paths[i], paths[i], |
4dd2df09 | 1973 | devnm, NULL); |
a0963a86 | 1974 | } |
8850ee3e | 1975 | exit(1); |
7a862a02 | 1976 | case -1: pr_err("cannot run mdmon. Array remains readonly\n"); |
8850ee3e | 1977 | return -1; |
9fe32043 N |
1978 | default: /* parent - good */ |
1979 | pid = wait(&status); | |
15c10423 | 1980 | if (pid < 0 || status != 0) { |
7a862a02 | 1981 | pr_err("failed to launch mdmon. Array remains readonly\n"); |
9fe32043 | 1982 | return -1; |
15c10423 | 1983 | } |
8850ee3e N |
1984 | } |
1985 | return 0; | |
1986 | } | |
1987 | ||
148acb7b DW |
1988 | __u32 random32(void) |
1989 | { | |
1990 | __u32 rv; | |
1991 | int rfd = open("/dev/urandom", O_RDONLY); | |
1992 | if (rfd < 0 || read(rfd, &rv, 4) != 4) | |
1993 | rv = random(); | |
1994 | if (rfd >= 0) | |
1995 | close(rfd); | |
1996 | return rv; | |
1997 | } | |
1998 | ||
c5f71c24 JS |
1999 | void random_uuid(__u8 *buf) |
2000 | { | |
2001 | int fd, i, len; | |
2002 | __u32 r[4]; | |
2003 | ||
2004 | fd = open("/dev/urandom", O_RDONLY); | |
2005 | if (fd < 0) | |
2006 | goto use_random; | |
2007 | len = read(fd, buf, 16); | |
2008 | close(fd); | |
2009 | if (len != 16) | |
2010 | goto use_random; | |
2011 | ||
2012 | return; | |
2013 | ||
2014 | use_random: | |
2015 | for (i = 0; i < 4; i++) | |
2016 | r[i] = random(); | |
2017 | memcpy(buf, r, 16); | |
2018 | } | |
2019 | ||
edd8d13c NB |
2020 | int flush_metadata_updates(struct supertype *st) |
2021 | { | |
2022 | int sfd; | |
2023 | if (!st->updates) { | |
2024 | st->update_tail = NULL; | |
2025 | return -1; | |
2026 | } | |
2027 | ||
4dd2df09 | 2028 | sfd = connect_monitor(st->container_devnm); |
edd8d13c NB |
2029 | if (sfd < 0) |
2030 | return -1; | |
2031 | ||
2032 | while (st->updates) { | |
2033 | struct metadata_update *mu = st->updates; | |
2034 | st->updates = mu->next; | |
2035 | ||
2036 | send_message(sfd, mu, 0); | |
2037 | wait_reply(sfd, 0); | |
2038 | free(mu->buf); | |
2039 | free(mu); | |
2040 | } | |
2041 | ack(sfd, 0); | |
2042 | wait_reply(sfd, 0); | |
2043 | close(sfd); | |
2044 | st->update_tail = NULL; | |
2045 | return 0; | |
2046 | } | |
2047 | ||
2048 | void append_metadata_update(struct supertype *st, void *buf, int len) | |
2049 | { | |
2050 | ||
503975b9 | 2051 | struct metadata_update *mu = xmalloc(sizeof(*mu)); |
edd8d13c NB |
2052 | |
2053 | mu->buf = buf; | |
2054 | mu->len = len; | |
2055 | mu->space = NULL; | |
cb23f1f4 | 2056 | mu->space_list = NULL; |
edd8d13c NB |
2057 | mu->next = NULL; |
2058 | *st->update_tail = mu; | |
2059 | st->update_tail = &mu->next; | |
2060 | } | |
a931db9e | 2061 | |
fe6729fa NB |
2062 | #ifdef __TINYC__ |
2063 | /* tinyc doesn't optimize this check in ioctl.h out ... */ | |
2064 | unsigned int __invalid_size_argument_for_IOC = 0; | |
2065 | #endif | |
2066 | ||
6d11ec6f AK |
2067 | int experimental(void) |
2068 | { | |
2069 | if (check_env("MDADM_EXPERIMENTAL")) | |
2070 | return 1; | |
2071 | else { | |
7a862a02 | 2072 | pr_err("To use this feature MDADM_EXPERIMENTAL environment variable has to be defined.\n"); |
6d11ec6f AK |
2073 | return 0; |
2074 | } | |
2075 | } | |
2076 | ||
326727d9 AC |
2077 | /* Pick all spares matching given criteria from a container |
2078 | * if min_size == 0 do not check size | |
2079 | * if domlist == NULL do not check domains | |
2080 | * if spare_group given add it to domains of each spare | |
2081 | * metadata allows to test domains using metadata of destination array */ | |
2082 | struct mdinfo *container_choose_spares(struct supertype *st, | |
2083 | unsigned long long min_size, | |
2084 | struct domainlist *domlist, | |
2085 | char *spare_group, | |
2086 | const char *metadata, int get_one) | |
2087 | { | |
2088 | struct mdinfo *d, **dp, *disks = NULL; | |
2089 | ||
2090 | /* get list of all disks in container */ | |
2091 | if (st->ss->getinfo_super_disks) | |
2092 | disks = st->ss->getinfo_super_disks(st); | |
2093 | ||
2094 | if (!disks) | |
2095 | return disks; | |
2096 | /* find spare devices on the list */ | |
2097 | dp = &disks->devs; | |
2098 | disks->array.spare_disks = 0; | |
2099 | while (*dp) { | |
2100 | int found = 0; | |
2101 | d = *dp; | |
2102 | if (d->disk.state == 0) { | |
2103 | /* check if size is acceptable */ | |
2104 | unsigned long long dev_size; | |
2105 | dev_t dev = makedev(d->disk.major,d->disk.minor); | |
2106 | ||
2107 | if (!min_size || | |
2108 | (dev_size_from_id(dev, &dev_size) && | |
2109 | dev_size >= min_size)) | |
2110 | found = 1; | |
2111 | /* check if domain matches */ | |
2112 | if (found && domlist) { | |
4dd2df09 | 2113 | struct dev_policy *pol = devid_policy(dev); |
326727d9 AC |
2114 | if (spare_group) |
2115 | pol_add(&pol, pol_domain, | |
2116 | spare_group, NULL); | |
e5508b36 | 2117 | if (domain_test(domlist, pol, metadata) != 1) |
326727d9 AC |
2118 | found = 0; |
2119 | dev_policy_free(pol); | |
2120 | } | |
2121 | } | |
2122 | if (found) { | |
2123 | dp = &d->next; | |
2124 | disks->array.spare_disks++; | |
2125 | if (get_one) { | |
2126 | sysfs_free(*dp); | |
2127 | d->next = NULL; | |
2128 | } | |
2129 | } else { | |
2130 | *dp = d->next; | |
2131 | d->next = NULL; | |
2132 | sysfs_free(d); | |
2133 | } | |
2134 | } | |
2135 | return disks; | |
2136 | } | |
9eafa1de MN |
2137 | |
2138 | /* Checks if paths point to the same device | |
2139 | * Returns 0 if they do. | |
2140 | * Returns 1 if they don't. | |
2141 | * Returns -1 if something went wrong, | |
2142 | * e.g. paths are empty or the files | |
2143 | * they point to don't exist */ | |
2144 | int compare_paths (char* path1, char* path2) | |
2145 | { | |
2146 | struct stat st1,st2; | |
2147 | ||
2148 | if (path1 == NULL || path2 == NULL) | |
2149 | return -1; | |
2150 | if (stat(path1,&st1) != 0) | |
2151 | return -1; | |
2152 | if (stat(path2,&st2) != 0) | |
2153 | return -1; | |
2154 | if ((st1.st_ino == st2.st_ino) && (st1.st_dev == st2.st_dev)) | |
2155 | return 0; | |
2156 | return 1; | |
2157 | } | |
a7dec3fd N |
2158 | |
2159 | /* Make sure we can open as many devices as needed */ | |
2160 | void enable_fds(int devices) | |
2161 | { | |
2162 | unsigned int fds = 20 + devices; | |
2163 | struct rlimit lim; | |
2164 | if (getrlimit(RLIMIT_NOFILE, &lim) != 0 | |
2165 | || lim.rlim_cur >= fds) | |
2166 | return; | |
2167 | if (lim.rlim_max < fds) | |
2168 | lim.rlim_max = fds; | |
2169 | lim.rlim_cur = fds; | |
2170 | setrlimit(RLIMIT_NOFILE, &lim); | |
2171 | } | |
a9c15847 N |
2172 | |
2173 | int in_initrd(void) | |
2174 | { | |
2175 | /* This is based on similar function in systemd. */ | |
2176 | struct statfs s; | |
76d0f188 JS |
2177 | /* statfs.f_type is signed long on s390x and MIPS, causing all |
2178 | sorts of sign extension problems with RAMFS_MAGIC being | |
2179 | defined as 0x858458f6 */ | |
a9c15847 | 2180 | return statfs("/", &s) >= 0 && |
7ac5d47e | 2181 | ((unsigned long)s.f_type == TMPFS_MAGIC || |
76d0f188 JS |
2182 | ((unsigned long)s.f_type & 0xFFFFFFFFUL) == |
2183 | ((unsigned long)RAMFS_MAGIC & 0xFFFFFFFFUL)); | |
a9c15847 | 2184 | } |
8832342d N |
2185 | |
2186 | void reopen_mddev(int mdfd) | |
2187 | { | |
2188 | /* Re-open without any O_EXCL, but keep | |
2189 | * the same fd | |
2190 | */ | |
2191 | char *devnm; | |
2192 | int fd; | |
2193 | devnm = fd2devnm(mdfd); | |
2194 | close(mdfd); | |
2195 | fd = open_dev(devnm); | |
2196 | if (fd >= 0 && fd != mdfd) | |
2197 | dup2(fd, mdfd); | |
2198 | } | |
7716570e | 2199 | |
e80357f8 GJ |
2200 | static struct cmap_hooks *cmap_hooks = NULL; |
2201 | static int is_cmap_hooks_ready = 0; | |
7716570e | 2202 | |
e80357f8 GJ |
2203 | void set_cmap_hooks(void) |
2204 | { | |
2205 | cmap_hooks = xmalloc(sizeof(struct cmap_hooks)); | |
2206 | cmap_hooks->cmap_handle = dlopen("libcmap.so.4", RTLD_NOW | RTLD_LOCAL); | |
2207 | if (!cmap_hooks->cmap_handle) | |
2208 | return; | |
7716570e | 2209 | |
e80357f8 GJ |
2210 | cmap_hooks->initialize = dlsym(cmap_hooks->cmap_handle, "cmap_initialize"); |
2211 | cmap_hooks->get_string = dlsym(cmap_hooks->cmap_handle, "cmap_get_string"); | |
2212 | cmap_hooks->finalize = dlsym(cmap_hooks->cmap_handle, "cmap_finalize"); | |
7716570e | 2213 | |
e80357f8 GJ |
2214 | if (!cmap_hooks->initialize || !cmap_hooks->get_string || |
2215 | !cmap_hooks->finalize) | |
2216 | dlclose(cmap_hooks->cmap_handle); | |
2217 | else | |
2218 | is_cmap_hooks_ready = 1; | |
2219 | } | |
7716570e | 2220 | |
e80357f8 GJ |
2221 | int get_cluster_name(char **cluster_name) |
2222 | { | |
2223 | int rv = -1; | |
2224 | cmap_handle_t handle; | |
7716570e | 2225 | |
e80357f8 GJ |
2226 | if (!is_cmap_hooks_ready) |
2227 | return rv; | |
7716570e | 2228 | |
e80357f8 | 2229 | rv = cmap_hooks->initialize(&handle); |
7716570e GJ |
2230 | if (rv != CS_OK) |
2231 | goto out; | |
2232 | ||
e80357f8 | 2233 | rv = cmap_hooks->get_string(handle, "totem.cluster_name", cluster_name); |
7716570e GJ |
2234 | if (rv != CS_OK) { |
2235 | free(*cluster_name); | |
2236 | rv = -1; | |
2237 | goto name_err; | |
2238 | } | |
2239 | ||
2240 | rv = 0; | |
2241 | name_err: | |
e80357f8 | 2242 | cmap_hooks->finalize(handle); |
7716570e | 2243 | out: |
7716570e GJ |
2244 | return rv; |
2245 | } | |
d15a1f72 GJ |
2246 | |
2247 | void set_dlm_hooks(void) | |
2248 | { | |
2249 | dlm_hooks = xmalloc(sizeof(struct dlm_hooks)); | |
2250 | dlm_hooks->dlm_handle = dlopen("libdlm_lt.so.3", RTLD_NOW | RTLD_LOCAL); | |
2251 | if (!dlm_hooks->dlm_handle) | |
2252 | return; | |
2253 | ||
2254 | dlm_hooks->create_lockspace = dlsym(dlm_hooks->dlm_handle, "dlm_create_lockspace"); | |
2255 | dlm_hooks->release_lockspace = dlsym(dlm_hooks->dlm_handle, "dlm_release_lockspace"); | |
2256 | dlm_hooks->ls_lock = dlsym(dlm_hooks->dlm_handle, "dlm_ls_lock"); | |
2257 | dlm_hooks->ls_unlock = dlsym(dlm_hooks->dlm_handle, "dlm_ls_unlock"); | |
2258 | dlm_hooks->ls_get_fd = dlsym(dlm_hooks->dlm_handle, "dlm_ls_get_fd"); | |
2259 | dlm_hooks->dispatch = dlsym(dlm_hooks->dlm_handle, "dlm_dispatch"); | |
2260 | ||
2261 | if (!dlm_hooks->create_lockspace || !dlm_hooks->ls_lock || | |
2262 | !dlm_hooks->ls_unlock || !dlm_hooks->release_lockspace || | |
2263 | !dlm_hooks->ls_get_fd || !dlm_hooks->dispatch) | |
2264 | dlclose(dlm_hooks->dlm_handle); | |
2265 | else | |
2266 | is_dlm_hooks_ready = 1; | |
2267 | } | |
e80357f8 GJ |
2268 | |
2269 | void set_hooks(void) | |
2270 | { | |
2271 | set_dlm_hooks(); | |
2272 | set_cmap_hooks(); | |
2273 | } |