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Commit | Line | Data |
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64c4757e | 1 | /* |
9a9dab36 | 2 | * mdadm - manage Linux "md" devices aka RAID arrays. |
64c4757e | 3 | * |
4f589ad0 | 4 | * Copyright (C) 2001-2006 Neil Brown <neilb@suse.de> |
64c4757e NB |
5 | * |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | * | |
21 | * Author: Neil Brown | |
22 | * Email: <neilb@cse.unsw.edu.au> | |
23 | * Paper: Neil Brown | |
24 | * School of Computer Science and Engineering | |
25 | * The University of New South Wales | |
26 | * Sydney, 2052 | |
27 | * Australia | |
28 | */ | |
29 | ||
9a9dab36 | 30 | #include "mdadm.h" |
64c4757e | 31 | #include "md_p.h" |
edd8d13c | 32 | #include <sys/socket.h> |
64c4757e | 33 | #include <sys/utsname.h> |
9fe32043 | 34 | #include <sys/wait.h> |
edd8d13c | 35 | #include <sys/un.h> |
98c6faba | 36 | #include <ctype.h> |
a322f70c | 37 | #include <dirent.h> |
a931db9e | 38 | #include <signal.h> |
0a816ef9 NB |
39 | |
40 | /* | |
41 | * following taken from linux/blkpg.h because they aren't | |
42 | * anywhere else and it isn't safe to #include linux/ * stuff. | |
43 | */ | |
44 | ||
45 | #define BLKPG _IO(0x12,105) | |
46 | ||
47 | /* The argument structure */ | |
48 | struct blkpg_ioctl_arg { | |
49 | int op; | |
50 | int flags; | |
51 | int datalen; | |
52 | void *data; | |
53 | }; | |
54 | ||
55 | /* The subfunctions (for the op field) */ | |
56 | #define BLKPG_ADD_PARTITION 1 | |
57 | #define BLKPG_DEL_PARTITION 2 | |
58 | ||
59 | /* Sizes of name fields. Unused at present. */ | |
60 | #define BLKPG_DEVNAMELTH 64 | |
61 | #define BLKPG_VOLNAMELTH 64 | |
62 | ||
63 | /* The data structure for ADD_PARTITION and DEL_PARTITION */ | |
64 | struct blkpg_partition { | |
65 | long long start; /* starting offset in bytes */ | |
66 | long long length; /* length in bytes */ | |
67 | int pno; /* partition number */ | |
68 | char devname[BLKPG_DEVNAMELTH]; /* partition name, like sda5 or c0d1p2, | |
69 | to be used in kernel messages */ | |
70 | char volname[BLKPG_VOLNAMELTH]; /* volume label */ | |
71 | }; | |
64c4757e NB |
72 | |
73 | /* | |
74 | * Parse a 128 bit uuid in 4 integers | |
75 | * format is 32 hexx nibbles with options :.<space> separator | |
76 | * If not exactly 32 hex digits are found, return 0 | |
77 | * else return 1 | |
78 | */ | |
79 | int parse_uuid(char *str, int uuid[4]) | |
80 | { | |
aba69144 NB |
81 | int hit = 0; /* number of Hex digIT */ |
82 | int i; | |
83 | char c; | |
84 | for (i=0; i<4; i++) uuid[i]=0; | |
85 | ||
86 | while ((c= *str++)) { | |
87 | int n; | |
88 | if (c>='0' && c<='9') | |
89 | n = c-'0'; | |
90 | else if (c>='a' && c <= 'f') | |
91 | n = 10 + c - 'a'; | |
92 | else if (c>='A' && c <= 'F') | |
93 | n = 10 + c - 'A'; | |
94 | else if (strchr(":. -", c)) | |
95 | continue; | |
96 | else return 0; | |
97 | ||
98 | if (hit<32) { | |
99 | uuid[hit/8] <<= 4; | |
100 | uuid[hit/8] += n; | |
101 | } | |
102 | hit++; | |
82b27616 | 103 | } |
aba69144 NB |
104 | if (hit == 32) |
105 | return 1; | |
106 | return 0; | |
64c4757e NB |
107 | } |
108 | ||
109 | ||
110 | /* | |
111 | * Get the md version number. | |
112 | * We use the RAID_VERSION ioctl if it is supported | |
113 | * If not, but we have a block device with major '9', we assume | |
114 | * 0.36.0 | |
115 | * | |
116 | * Return version number as 24 but number - assume version parts | |
117 | * always < 255 | |
118 | */ | |
119 | ||
120 | int md_get_version(int fd) | |
121 | { | |
122 | struct stat stb; | |
123 | mdu_version_t vers; | |
124 | ||
125 | if (fstat(fd, &stb)<0) | |
126 | return -1; | |
127 | if ((S_IFMT&stb.st_mode) != S_IFBLK) | |
128 | return -1; | |
129 | ||
130 | if (ioctl(fd, RAID_VERSION, &vers) == 0) | |
682c7051 | 131 | return (vers.major*10000) + (vers.minor*100) + vers.patchlevel; |
5787fa49 NB |
132 | if (errno == EACCES) |
133 | return -1; | |
0df46c2a | 134 | if (major(stb.st_rdev) == MD_MAJOR) |
682c7051 | 135 | return (3600); |
64c4757e NB |
136 | return -1; |
137 | } | |
138 | ||
64c4757e NB |
139 | int get_linux_version() |
140 | { | |
141 | struct utsname name; | |
98c6faba | 142 | char *cp; |
64c4757e NB |
143 | int a,b,c; |
144 | if (uname(&name) <0) | |
145 | return -1; | |
146 | ||
98c6faba NB |
147 | cp = name.release; |
148 | a = strtoul(cp, &cp, 10); | |
149 | if (*cp != '.') return -1; | |
150 | b = strtoul(cp+1, &cp, 10); | |
151 | if (*cp != '.') return -1; | |
152 | c = strtoul(cp+1, NULL, 10); | |
153 | ||
682c7051 | 154 | return (a*1000000)+(b*1000)+c; |
64c4757e NB |
155 | } |
156 | ||
0430ed48 NB |
157 | void remove_partitions(int fd) |
158 | { | |
159 | /* remove partitions from this block devices. | |
160 | * This is used for components added to an array | |
161 | */ | |
162 | #ifdef BLKPG_DEL_PARTITION | |
163 | struct blkpg_ioctl_arg a; | |
164 | struct blkpg_partition p; | |
165 | ||
166 | a.op = BLKPG_DEL_PARTITION; | |
167 | a.data = (void*)&p; | |
168 | a.datalen = sizeof(p); | |
169 | a.flags = 0; | |
170 | memset(a.data, 0, a.datalen); | |
171 | for (p.pno=0; p.pno < 16; p.pno++) | |
172 | ioctl(fd, BLKPG, &a); | |
173 | #endif | |
174 | } | |
175 | ||
583315d9 | 176 | int enough(int level, int raid_disks, int layout, int clean, |
265e0f17 | 177 | char *avail, int avail_disks) |
64c4757e | 178 | { |
265e0f17 | 179 | int copies, first; |
64c4757e | 180 | switch (level) { |
265e0f17 NB |
181 | case 10: |
182 | /* This is the tricky one - we need to check | |
183 | * which actual disks are present. | |
184 | */ | |
702b557b | 185 | copies = (layout&255)* ((layout>>8) & 255); |
265e0f17 NB |
186 | first=0; |
187 | do { | |
188 | /* there must be one of the 'copies' form 'first' */ | |
189 | int n = copies; | |
190 | int cnt=0; | |
191 | while (n--) { | |
192 | if (avail[first]) | |
193 | cnt++; | |
194 | first = (first+1) % raid_disks; | |
195 | } | |
196 | if (cnt == 0) | |
197 | return 0; | |
198 | ||
199 | } while (first != 0); | |
200 | return 1; | |
e5329c37 | 201 | |
e0d19036 NB |
202 | case -4: |
203 | return avail_disks>= 1; | |
64c4757e NB |
204 | case -1: |
205 | case 0: | |
206 | return avail_disks == raid_disks; | |
207 | case 1: | |
208 | return avail_disks >= 1; | |
209 | case 4: | |
210 | case 5: | |
583315d9 NB |
211 | if (clean) |
212 | return avail_disks >= raid_disks-1; | |
213 | else | |
214 | return avail_disks >= raid_disks; | |
98c6faba | 215 | case 6: |
583315d9 NB |
216 | if (clean) |
217 | return avail_disks >= raid_disks-2; | |
218 | else | |
219 | return avail_disks >= raid_disks; | |
64c4757e NB |
220 | default: |
221 | return 0; | |
222 | } | |
223 | } | |
224 | ||
36ba7d48 | 225 | const int uuid_match_any[4] = { ~0, ~0, ~0, ~0 }; |
f277ce36 | 226 | int same_uuid(int a[4], int b[4], int swapuuid) |
64c4757e | 227 | { |
36ba7d48 DW |
228 | if (memcmp(a, uuid_match_any, sizeof(int[4])) == 0 || |
229 | memcmp(b, uuid_match_any, sizeof(int[4])) == 0) | |
230 | return 1; | |
231 | ||
f277ce36 NB |
232 | if (swapuuid) { |
233 | /* parse uuids are hostendian. | |
234 | * uuid's from some superblocks are big-ending | |
aba69144 | 235 | * if there is a difference, we need to swap.. |
f277ce36 NB |
236 | */ |
237 | unsigned char *ac = (unsigned char *)a; | |
238 | unsigned char *bc = (unsigned char *)b; | |
239 | int i; | |
240 | for (i=0; i<16; i+= 4) { | |
241 | if (ac[i+0] != bc[i+3] || | |
242 | ac[i+1] != bc[i+2] || | |
243 | ac[i+2] != bc[i+1] || | |
244 | ac[i+3] != bc[i+0]) | |
245 | return 0; | |
246 | } | |
247 | return 1; | |
248 | } else { | |
249 | if (a[0]==b[0] && | |
250 | a[1]==b[1] && | |
251 | a[2]==b[2] && | |
252 | a[3]==b[3]) | |
253 | return 1; | |
254 | return 0; | |
255 | } | |
64c4757e | 256 | } |
350f29f9 NB |
257 | void copy_uuid(void *a, int b[4], int swapuuid) |
258 | { | |
259 | if (swapuuid) { | |
260 | /* parse uuids are hostendian. | |
261 | * uuid's from some superblocks are big-ending | |
262 | * if there is a difference, we need to swap.. | |
263 | */ | |
264 | unsigned char *ac = (unsigned char *)a; | |
265 | unsigned char *bc = (unsigned char *)b; | |
266 | int i; | |
267 | for (i=0; i<16; i+= 4) { | |
268 | ac[i+0] = bc[i+3]; | |
269 | ac[i+1] = bc[i+2]; | |
270 | ac[i+2] = bc[i+1]; | |
271 | ac[i+3] = bc[i+0]; | |
272 | } | |
273 | } else | |
274 | memcpy(a, b, 16); | |
275 | } | |
64c4757e | 276 | |
ff54de6e | 277 | char *fname_from_uuid(struct supertype *st, struct mdinfo *info, char *buf, char sep) |
d7288ddc | 278 | { |
9968e376 DW |
279 | int i, j; |
280 | int id; | |
d7288ddc N |
281 | char uuid[16]; |
282 | char *c = buf; | |
283 | strcpy(c, "UUID-"); | |
284 | c += strlen(c); | |
285 | copy_uuid(uuid, info->uuid, st->ss->swapuuid); | |
9968e376 DW |
286 | for (i = 0; i < 4; i++) { |
287 | id = uuid[i]; | |
288 | if (i) | |
ff54de6e | 289 | *c++ = sep; |
9968e376 DW |
290 | for (j = 3; j >= 0; j--) { |
291 | sprintf(c,"%02x", (unsigned char) uuid[j+4*i]); | |
292 | c+= 2; | |
293 | } | |
d7288ddc N |
294 | } |
295 | return buf; | |
296 | } | |
297 | ||
435d4ebb | 298 | #ifndef MDASSEMBLE |
682c7051 NB |
299 | int check_ext2(int fd, char *name) |
300 | { | |
301 | /* | |
302 | * Check for an ext2fs file system. | |
303 | * Superblock is always 1K at 1K offset | |
304 | * | |
305 | * s_magic is le16 at 56 == 0xEF53 | |
306 | * report mtime - le32 at 44 | |
307 | * blocks - le32 at 4 | |
308 | * logblksize - le32 at 24 | |
309 | */ | |
310 | unsigned char sb[1024]; | |
311 | time_t mtime; | |
312 | int size, bsize; | |
313 | if (lseek(fd, 1024,0)!= 1024) | |
314 | return 0; | |
315 | if (read(fd, sb, 1024)!= 1024) | |
316 | return 0; | |
317 | if (sb[56] != 0x53 || sb[57] != 0xef) | |
318 | return 0; | |
319 | ||
320 | mtime = sb[44]|(sb[45]|(sb[46]|sb[47]<<8)<<8)<<8; | |
321 | bsize = sb[24]|(sb[25]|(sb[26]|sb[27]<<8)<<8)<<8; | |
322 | size = sb[4]|(sb[5]|(sb[6]|sb[7]<<8)<<8)<<8; | |
323 | fprintf(stderr, Name ": %s appears to contain an ext2fs file system\n", | |
324 | name); | |
325 | fprintf(stderr," size=%dK mtime=%s", | |
326 | size*(1<<bsize), ctime(&mtime)); | |
327 | return 1; | |
328 | } | |
329 | ||
330 | int check_reiser(int fd, char *name) | |
331 | { | |
332 | /* | |
333 | * superblock is at 64K | |
334 | * size is 1024; | |
335 | * Magic string "ReIsErFs" or "ReIsEr2Fs" at 52 | |
336 | * | |
337 | */ | |
338 | unsigned char sb[1024]; | |
881990a2 | 339 | unsigned long size; |
682c7051 NB |
340 | if (lseek(fd, 64*1024, 0) != 64*1024) |
341 | return 0; | |
342 | if (read(fd, sb, 1024) != 1024) | |
343 | return 0; | |
a46f4061 NB |
344 | if (strncmp((char*)sb+52, "ReIsErFs",8)!=0 && |
345 | strncmp((char*)sb+52, "ReIsEr2Fs",9)!=0) | |
682c7051 NB |
346 | return 0; |
347 | fprintf(stderr, Name ": %s appears to contain a reiserfs file system\n",name); | |
348 | size = sb[0]|(sb[1]|(sb[2]|sb[3]<<8)<<8)<<8; | |
881990a2 | 349 | fprintf(stderr, " size = %luK\n", size*4); |
aba69144 | 350 | |
682c7051 NB |
351 | return 1; |
352 | } | |
353 | ||
354 | int check_raid(int fd, char *name) | |
355 | { | |
4b1ac34b | 356 | struct mdinfo info; |
682c7051 | 357 | time_t crtime; |
d078d77c | 358 | char *level; |
82d9eba6 | 359 | struct supertype *st = guess_super(fd); |
f9ce90ba | 360 | |
82d9eba6 | 361 | if (!st) return 0; |
3da92f27 | 362 | st->ss->load_super(st, fd, name); |
82d9eba6 NB |
363 | /* Looks like a raid array .. */ |
364 | fprintf(stderr, Name ": %s appears to be part of a raid array:\n", | |
365 | name); | |
3da92f27 NB |
366 | st->ss->getinfo_super(st, &info); |
367 | st->ss->free_super(st); | |
82d9eba6 | 368 | crtime = info.array.ctime; |
d078d77c NB |
369 | level = map_num(pers, info.array.level); |
370 | if (!level) level = "-unknown-"; | |
371 | fprintf(stderr, " level=%s devices=%d ctime=%s", | |
372 | level, info.array.raid_disks, ctime(&crtime)); | |
82d9eba6 | 373 | return 1; |
682c7051 NB |
374 | } |
375 | ||
682c7051 NB |
376 | int ask(char *mesg) |
377 | { | |
378 | char *add = ""; | |
379 | int i; | |
380 | for (i=0; i<5; i++) { | |
381 | char buf[100]; | |
382 | fprintf(stderr, "%s%s", mesg, add); | |
383 | fflush(stderr); | |
384 | if (fgets(buf, 100, stdin)==NULL) | |
385 | return 0; | |
386 | if (buf[0]=='y' || buf[0]=='Y') | |
387 | return 1; | |
388 | if (buf[0]=='n' || buf[0]=='N') | |
389 | return 0; | |
390 | add = "(y/n) "; | |
391 | } | |
392 | fprintf(stderr, Name ": assuming 'no'\n"); | |
393 | return 0; | |
394 | } | |
435d4ebb | 395 | #endif /* MDASSEMBLE */ |
682c7051 NB |
396 | |
397 | char *map_num(mapping_t *map, int num) | |
398 | { | |
399 | while (map->name) { | |
400 | if (map->num == num) | |
401 | return map->name; | |
402 | map++; | |
403 | } | |
404 | return NULL; | |
405 | } | |
406 | ||
407 | int map_name(mapping_t *map, char *name) | |
408 | { | |
409 | while (map->name) { | |
410 | if (strcmp(map->name, name)==0) | |
411 | return map->num; | |
412 | map++; | |
413 | } | |
98c6faba | 414 | return UnSet; |
682c7051 | 415 | } |
82b27616 | 416 | |
e5329c37 | 417 | |
8d80900b | 418 | int is_standard(char *dev, int *nump) |
e5329c37 NB |
419 | { |
420 | /* tests if dev is a "standard" md dev name. | |
421 | * i.e if the last component is "/dNN" or "/mdNN", | |
aba69144 | 422 | * where NN is a string of digits |
598f0d58 NB |
423 | * Returns 1 if a partitionable standard, |
424 | * -1 if non-partitonable, | |
425 | * 0 if not a standard name. | |
e5329c37 | 426 | */ |
8d80900b NB |
427 | char *d = strrchr(dev, '/'); |
428 | int type=0; | |
429 | int num; | |
430 | if (!d) | |
e5329c37 | 431 | return 0; |
8d80900b NB |
432 | if (strncmp(d, "/d",2)==0) |
433 | d += 2, type=1; /* /dev/md/dN{pM} */ | |
434 | else if (strncmp(d, "/md_d", 5)==0) | |
435 | d += 5, type=1; /* /dev/md_dNpM */ | |
436 | else if (strncmp(d, "/md", 3)==0) | |
437 | d += 3, type=-1; /* /dev/mdN */ | |
438 | else if (d-dev > 3 && strncmp(d-2, "md/", 3)==0) | |
5a6d1148 | 439 | d += 1, type=-1; /* /dev/md/N */ |
e5329c37 NB |
440 | else |
441 | return 0; | |
8d80900b | 442 | if (!*d) |
e5329c37 | 443 | return 0; |
8d80900b NB |
444 | num = atoi(d); |
445 | while (isdigit(*d)) | |
446 | d++; | |
447 | if (*d) | |
e5329c37 | 448 | return 0; |
8d80900b NB |
449 | if (nump) *nump = num; |
450 | ||
451 | return type; | |
e5329c37 NB |
452 | } |
453 | ||
454 | ||
82b27616 NB |
455 | /* |
456 | * convert a major/minor pair for a block device into a name in /dev, if possible. | |
457 | * On the first call, walk /dev collecting name. | |
458 | * Put them in a simple linked listfor now. | |
459 | */ | |
460 | struct devmap { | |
461 | int major, minor; | |
462 | char *name; | |
463 | struct devmap *next; | |
464 | } *devlist = NULL; | |
465 | int devlist_ready = 0; | |
466 | ||
82b27616 NB |
467 | int add_dev(const char *name, const struct stat *stb, int flag, struct FTW *s) |
468 | { | |
bed256c2 NB |
469 | struct stat st; |
470 | if (S_ISLNK(stb->st_mode)) { | |
471 | stat(name, &st); | |
472 | stb = &st; | |
82b27616 | 473 | } |
bed256c2 NB |
474 | |
475 | if ((stb->st_mode&S_IFMT)== S_IFBLK) { | |
476 | char *n = strdup(name); | |
477 | struct devmap *dm = malloc(sizeof(*dm)); | |
478 | if (strncmp(n, "/dev/./", 7)==0) | |
479 | strcpy(n+4, name+6); | |
480 | if (dm) { | |
481 | dm->major = major(stb->st_rdev); | |
482 | dm->minor = minor(stb->st_rdev); | |
483 | dm->name = n; | |
484 | dm->next = devlist; | |
485 | devlist = dm; | |
486 | } | |
487 | } | |
488 | return 0; | |
82b27616 NB |
489 | } |
490 | ||
45e878bb NB |
491 | #ifndef HAVE_NFTW |
492 | #ifdef HAVE_FTW | |
493 | int add_dev_1(const char *name, const struct stat *stb, int flag) | |
494 | { | |
495 | return add_dev(name, stb, flag, NULL); | |
496 | } | |
497 | int nftw(const char *path, int (*han)(const char *name, const struct stat *stb, int flag, struct FTW *s), int nopenfd, int flags) | |
498 | { | |
499 | return ftw(path, add_dev_1, nopenfd); | |
500 | } | |
501 | #else | |
45e878bb NB |
502 | int nftw(const char *path, int (*han)(const char *name, const struct stat *stb, int flag, struct FTW *s), int nopenfd, int flags) |
503 | { | |
504 | return 0; | |
505 | } | |
506 | #endif /* HAVE_FTW */ | |
507 | #endif /* HAVE_NFTW */ | |
508 | ||
dd0781e5 NB |
509 | /* |
510 | * Find a block device with the right major/minor number. | |
b79713f8 NB |
511 | * If we find multiple names, choose the shortest. |
512 | * If we find a non-standard name, it is probably there | |
513 | * deliberately so prefer it over a standard name. | |
514 | * This applies only to names for MD devices. | |
dd0781e5 | 515 | */ |
16c6fa80 | 516 | char *map_dev(int major, int minor, int create) |
82b27616 | 517 | { |
dd0781e5 | 518 | struct devmap *p; |
b79713f8 | 519 | char *std = NULL, *nonstd=NULL; |
e7bb5d23 | 520 | int did_check = 0; |
eed35d66 | 521 | |
e81cdd9f | 522 | if (major == 0 && minor == 0) |
eed35d66 | 523 | return NULL; |
e81cdd9f | 524 | |
e7bb5d23 | 525 | retry: |
dd0781e5 | 526 | if (!devlist_ready) { |
0a416ec3 NB |
527 | char *dev = "/dev"; |
528 | struct stat stb; | |
eed35d66 NB |
529 | while(devlist) { |
530 | struct devmap *d = devlist; | |
531 | devlist = d->next; | |
532 | free(d->name); | |
533 | free(d); | |
534 | } | |
0a416ec3 NB |
535 | if (lstat(dev, &stb)==0 && |
536 | S_ISLNK(stb.st_mode)) | |
537 | dev = "/dev/."; | |
538 | nftw(dev, add_dev, 10, FTW_PHYS); | |
dd0781e5 | 539 | devlist_ready=1; |
e7bb5d23 | 540 | did_check = 1; |
dd0781e5 | 541 | } |
82b27616 | 542 | |
dd0781e5 NB |
543 | for (p=devlist; p; p=p->next) |
544 | if (p->major == major && | |
545 | p->minor == minor) { | |
b79713f8 NB |
546 | if (is_standard(p->name, NULL)) { |
547 | if (std == NULL || | |
548 | strlen(p->name) < strlen(std)) | |
549 | std = p->name; | |
550 | } else { | |
551 | if (nonstd == NULL || | |
552 | strlen(p->name) < strlen(nonstd)) | |
553 | nonstd = p->name; | |
554 | } | |
dd0781e5 | 555 | } |
e7bb5d23 NB |
556 | if (!std && !nonstd && !did_check) { |
557 | devlist_ready = 0; | |
558 | goto retry; | |
559 | } | |
16c6fa80 NB |
560 | if (create && !std && !nonstd) { |
561 | static char buf[30]; | |
382245c3 | 562 | snprintf(buf, sizeof(buf), "%d:%d", major, minor); |
16c6fa80 NB |
563 | nonstd = buf; |
564 | } | |
565 | ||
b79713f8 | 566 | return nonstd ? nonstd : std; |
82b27616 NB |
567 | } |
568 | ||
4b1ac34b | 569 | unsigned long calc_csum(void *super, int bytes) |
82b27616 | 570 | { |
56eb10c0 | 571 | unsigned long long newcsum = 0; |
82b27616 | 572 | int i; |
4b1ac34b NB |
573 | unsigned int csum; |
574 | unsigned int *superc = (unsigned int*) super; | |
82b27616 | 575 | |
4b1ac34b | 576 | for(i=0; i<bytes/4; i++) |
82b27616 NB |
577 | newcsum+= superc[i]; |
578 | csum = (newcsum& 0xffffffff) + (newcsum>>32); | |
570c0542 | 579 | #ifdef __alpha__ |
aba69144 | 580 | /* The in-kernel checksum calculation is always 16bit on |
570c0542 NB |
581 | * the alpha, though it is 32 bit on i386... |
582 | * I wonder what it is elsewhere... (it uses and API in | |
583 | * a way that it shouldn't). | |
584 | */ | |
585 | csum = (csum & 0xffff) + (csum >> 16); | |
586 | csum = (csum & 0xffff) + (csum >> 16); | |
587 | #endif | |
82b27616 NB |
588 | return csum; |
589 | } | |
cd29a5c8 | 590 | |
435d4ebb | 591 | #ifndef MDASSEMBLE |
56eb10c0 | 592 | char *human_size(long long bytes) |
cd29a5c8 NB |
593 | { |
594 | static char buf[30]; | |
d5d3721e NB |
595 | |
596 | /* We convert bytes to either centi-M{ega,ibi}bytes or | |
597 | * centi-G{igi,ibi}bytes, with appropriate rounding, | |
598 | * and then print 1/100th of those as a decimal. | |
599 | * We allow upto 2048Megabytes before converting to | |
600 | * gigabytes, as that shows more precision and isn't | |
601 | * too large a number. | |
602 | * Terrabytes are not yet handled. | |
603 | */ | |
cd29a5c8 | 604 | |
56eb10c0 | 605 | if (bytes < 5000*1024) |
cd29a5c8 | 606 | buf[0]=0; |
d5d3721e NB |
607 | else if (bytes < 2*1024LL*1024LL*1024LL) { |
608 | long cMiB = (bytes / ( (1LL<<20) / 200LL ) +1) /2; | |
609 | long cMB = (bytes / ( 1000000LL / 200LL ) +1) /2; | |
8f23b0b3 | 610 | snprintf(buf, sizeof(buf), " (%ld.%02ld MiB %ld.%02ld MB)", |
d5d3721e NB |
611 | cMiB/100 , cMiB % 100, |
612 | cMB/100, cMB % 100); | |
613 | } else { | |
614 | long cGiB = (bytes / ( (1LL<<30) / 200LL ) +1) /2; | |
615 | long cGB = (bytes / (1000000000LL/200LL ) +1) /2; | |
8f23b0b3 | 616 | snprintf(buf, sizeof(buf), " (%ld.%02ld GiB %ld.%02ld GB)", |
d5d3721e NB |
617 | cGiB/100 , cGiB % 100, |
618 | cGB/100, cGB % 100); | |
619 | } | |
cd29a5c8 NB |
620 | return buf; |
621 | } | |
e0d19036 NB |
622 | |
623 | char *human_size_brief(long long bytes) | |
624 | { | |
625 | static char buf[30]; | |
e0d19036 NB |
626 | |
627 | if (bytes < 5000*1024) | |
8f23b0b3 | 628 | snprintf(buf, sizeof(buf), "%ld.%02ldKiB", |
bd526cee | 629 | (long)(bytes>>10), (long)(((bytes&1023)*100+512)/1024) |
e0d19036 NB |
630 | ); |
631 | else if (bytes < 2*1024LL*1024LL*1024LL) | |
8f23b0b3 | 632 | snprintf(buf, sizeof(buf), "%ld.%02ldMiB", |
e0d19036 | 633 | (long)(bytes>>20), |
bd526cee | 634 | (long)((bytes&0xfffff)+0x100000/200)/(0x100000/100) |
e0d19036 NB |
635 | ); |
636 | else | |
8f23b0b3 | 637 | snprintf(buf, sizeof(buf), "%ld.%02ldGiB", |
e0d19036 | 638 | (long)(bytes>>30), |
bd526cee | 639 | (long)(((bytes>>10)&0xfffff)+0x100000/200)/(0x100000/100) |
e0d19036 NB |
640 | ); |
641 | return buf; | |
642 | } | |
e4965ef8 N |
643 | |
644 | void print_r10_layout(int layout) | |
645 | { | |
646 | int near = layout & 255; | |
647 | int far = (layout >> 8) & 255; | |
648 | int offset = (layout&0x10000); | |
649 | char *sep = ""; | |
650 | ||
651 | if (near != 1) { | |
652 | printf("%s near=%d", sep, near); | |
653 | sep = ","; | |
654 | } | |
655 | if (far != 1) | |
656 | printf("%s %s=%d", sep, offset?"offset":"far", far); | |
657 | if (near*far == 1) | |
658 | printf("NO REDUNDANCY"); | |
659 | } | |
435d4ebb | 660 | #endif |
e0d19036 | 661 | |
5f8097be NB |
662 | unsigned long long calc_array_size(int level, int raid_disks, int layout, |
663 | int chunksize, unsigned long long devsize) | |
664 | { | |
665 | int data_disks = 0; | |
666 | switch (level) { | |
667 | case 0: data_disks = raid_disks; break; | |
668 | case 1: data_disks = 1; break; | |
669 | case 4: | |
670 | case 5: data_disks = raid_disks - 1; break; | |
671 | case 6: data_disks = raid_disks - 2; break; | |
672 | case 10: data_disks = raid_disks / (layout & 255) / ((layout>>8)&255); | |
673 | break; | |
674 | } | |
675 | devsize &= ~(unsigned long long)((chunksize>>9)-1); | |
676 | return data_disks * devsize; | |
677 | } | |
678 | ||
dd0781e5 | 679 | int get_mdp_major(void) |
98c6faba | 680 | { |
dd0781e5 NB |
681 | static int mdp_major = -1; |
682 | FILE *fl; | |
98c6faba NB |
683 | char *w; |
684 | int have_block = 0; | |
685 | int have_devices = 0; | |
686 | int last_num = -1; | |
dd0781e5 NB |
687 | |
688 | if (mdp_major != -1) | |
689 | return mdp_major; | |
690 | fl = fopen("/proc/devices", "r"); | |
98c6faba | 691 | if (!fl) |
dd0781e5 | 692 | return -1; |
98c6faba NB |
693 | while ((w = conf_word(fl, 1))) { |
694 | if (have_block && strcmp(w, "devices:")==0) | |
695 | have_devices = 1; | |
696 | have_block = (strcmp(w, "Block")==0); | |
697 | if (isdigit(w[0])) | |
698 | last_num = atoi(w); | |
699 | if (have_devices && strcmp(w, "mdp")==0) | |
700 | mdp_major = last_num; | |
701 | free(w); | |
702 | } | |
703 | fclose(fl); | |
dd0781e5 | 704 | return mdp_major; |
98c6faba NB |
705 | } |
706 | ||
0e600426 | 707 | #if !defined(MDASSEMBLE) || defined(MDASSEMBLE) && defined(MDASSEMBLE_AUTO) |
e0d19036 NB |
708 | char *get_md_name(int dev) |
709 | { | |
710 | /* find /dev/md%d or /dev/md/%d or make a device /dev/.tmp.md%d */ | |
98c6faba | 711 | /* if dev < 0, want /dev/md/d%d or find mdp in /proc/devices ... */ |
e0d19036 NB |
712 | static char devname[50]; |
713 | struct stat stb; | |
98c6faba | 714 | dev_t rdev; |
dd0781e5 | 715 | char *dn; |
98c6faba NB |
716 | |
717 | if (dev < 0) { | |
dd0781e5 NB |
718 | int mdp = get_mdp_major(); |
719 | if (mdp < 0) return NULL; | |
0df46c2a | 720 | rdev = makedev(mdp, (-1-dev)<<6); |
8f23b0b3 | 721 | snprintf(devname, sizeof(devname), "/dev/md/d%d", -1-dev); |
98c6faba NB |
722 | if (stat(devname, &stb) == 0 |
723 | && (S_IFMT&stb.st_mode) == S_IFBLK | |
724 | && (stb.st_rdev == rdev)) | |
725 | return devname; | |
726 | } else { | |
0df46c2a | 727 | rdev = makedev(MD_MAJOR, dev); |
8f23b0b3 | 728 | snprintf(devname, sizeof(devname), "/dev/md%d", dev); |
98c6faba NB |
729 | if (stat(devname, &stb) == 0 |
730 | && (S_IFMT&stb.st_mode) == S_IFBLK | |
731 | && (stb.st_rdev == rdev)) | |
732 | return devname; | |
733 | ||
8f23b0b3 | 734 | snprintf(devname, sizeof(devname), "/dev/md/%d", dev); |
98c6faba NB |
735 | if (stat(devname, &stb) == 0 |
736 | && (S_IFMT&stb.st_mode) == S_IFBLK | |
737 | && (stb.st_rdev == rdev)) | |
738 | return devname; | |
739 | } | |
16c6fa80 | 740 | dn = map_dev(major(rdev), minor(rdev), 0); |
dd0781e5 NB |
741 | if (dn) |
742 | return dn; | |
8f23b0b3 | 743 | snprintf(devname, sizeof(devname), "/dev/.tmp.md%d", dev); |
e0d19036 | 744 | if (mknod(devname, S_IFBLK | 0600, rdev) == -1) |
dd0781e5 NB |
745 | if (errno != EEXIST) |
746 | return NULL; | |
e0d19036 NB |
747 | |
748 | if (stat(devname, &stb) == 0 | |
749 | && (S_IFMT&stb.st_mode) == S_IFBLK | |
750 | && (stb.st_rdev == rdev)) | |
751 | return devname; | |
752 | unlink(devname); | |
753 | return NULL; | |
754 | } | |
755 | ||
756 | void put_md_name(char *name) | |
757 | { | |
758 | if (strncmp(name, "/dev/.tmp.md", 12)==0) | |
759 | unlink(name); | |
760 | } | |
ea24acd0 | 761 | |
ea24acd0 NB |
762 | int find_free_devnum(int use_partitions) |
763 | { | |
764 | int devnum; | |
765 | for (devnum = 127; devnum != 128; | |
766 | devnum = devnum ? devnum-1 : (1<<22)-1) { | |
767 | char *dn; | |
768 | int _devnum; | |
769 | ||
770 | _devnum = use_partitions ? (-1-devnum) : devnum; | |
771 | if (mddev_busy(_devnum)) | |
772 | continue; | |
773 | /* make sure it is new to /dev too, at least as a | |
774 | * non-standard */ | |
775 | dn = map_dev(dev2major(_devnum), dev2minor(_devnum), 0); | |
776 | if (dn && ! is_standard(dn, NULL)) | |
777 | continue; | |
778 | break; | |
779 | } | |
780 | if (devnum == 128) | |
781 | return NoMdDev; | |
782 | return use_partitions ? (-1-devnum) : devnum; | |
783 | } | |
435d4ebb | 784 | #endif /* !defined(MDASSEMBLE) || defined(MDASSEMBLE) && defined(MDASSEMBLE_AUTO) */ |
f9ce90ba | 785 | |
8b0dabea NB |
786 | int dev_open(char *dev, int flags) |
787 | { | |
788 | /* like 'open', but if 'dev' matches %d:%d, create a temp | |
789 | * block device and open that | |
790 | */ | |
791 | char *e; | |
792 | int fd = -1; | |
793 | char devname[32]; | |
e81cdd9f | 794 | int major; |
8b0dabea | 795 | int minor; |
e81cdd9f NB |
796 | |
797 | if (!dev) return -1; | |
798 | ||
799 | major = strtoul(dev, &e, 0); | |
8b0dabea NB |
800 | if (e > dev && *e == ':' && e[1] && |
801 | (minor = strtoul(e+1, &e, 0)) >= 0 && | |
802 | *e == 0) { | |
8c210183 NB |
803 | snprintf(devname, sizeof(devname), "/dev/.tmp.md.%d:%d:%d", |
804 | (int)getpid(), major, minor); | |
8b0dabea | 805 | if (mknod(devname, S_IFBLK|0600, makedev(major, minor))==0) { |
6416d527 | 806 | fd = open(devname, flags|O_DIRECT); |
8b0dabea NB |
807 | unlink(devname); |
808 | } | |
809 | } else | |
6416d527 | 810 | fd = open(dev, flags|O_DIRECT); |
8b0dabea NB |
811 | return fd; |
812 | } | |
f9ce90ba | 813 | |
a931db9e NB |
814 | int open_dev_excl(int devnum) |
815 | { | |
816 | char buf[20]; | |
817 | int i; | |
818 | ||
819 | sprintf(buf, "%d:%d", dev2major(devnum), dev2minor(devnum)); | |
820 | for (i=0 ; i<25 ; i++) { | |
821 | int fd = dev_open(buf, O_RDWR|O_EXCL); | |
822 | if (fd >= 0) | |
823 | return fd; | |
824 | if (errno != EBUSY) | |
825 | return fd; | |
826 | usleep(200000); | |
827 | } | |
828 | return -1; | |
829 | } | |
830 | ||
cdddbdbc | 831 | struct superswitch *superlist[] = { &super0, &super1, &super_ddf, &super_imsm, NULL }; |
f9ce90ba | 832 | |
ea24acd0 | 833 | #if !defined(MDASSEMBLE) || defined(MDASSEMBLE) && defined(MDASSEMBLE_AUTO) |
f7dd881f | 834 | |
1686dc25 | 835 | struct supertype *super_by_fd(int fd) |
f9ce90ba | 836 | { |
1686dc25 NB |
837 | mdu_array_info_t array; |
838 | int vers; | |
839 | int minor; | |
840 | struct supertype *st = NULL; | |
7e0f6979 | 841 | struct mdinfo *sra; |
142cb9e1 | 842 | char *verstr; |
1686dc25 NB |
843 | char version[20]; |
844 | int i; | |
f7e7067b | 845 | char *subarray = NULL; |
1686dc25 NB |
846 | |
847 | sra = sysfs_read(fd, 0, GET_VERSION); | |
848 | ||
849 | if (sra) { | |
7e0f6979 NB |
850 | vers = sra->array.major_version; |
851 | minor = sra->array.minor_version; | |
142cb9e1 | 852 | verstr = sra->text_version; |
1686dc25 NB |
853 | } else { |
854 | if (ioctl(fd, GET_ARRAY_INFO, &array)) | |
855 | array.major_version = array.minor_version = 0; | |
856 | vers = array.major_version; | |
857 | minor = array.minor_version; | |
142cb9e1 | 858 | verstr = ""; |
6fbba4c9 | 859 | } |
82d9eba6 | 860 | |
1686dc25 NB |
861 | if (vers != -1) { |
862 | sprintf(version, "%d.%d", vers, minor); | |
863 | verstr = version; | |
6fbba4c9 | 864 | } |
3c558363 | 865 | if (minor == -2 && is_subarray(verstr)) { |
f7e7067b NB |
866 | char *dev = verstr+1; |
867 | subarray = strchr(dev, '/'); | |
868 | int devnum; | |
869 | if (subarray) | |
870 | *subarray++ = '\0'; | |
77472ff8 | 871 | devnum = devname2devnum(dev); |
f7e7067b NB |
872 | subarray = strdup(subarray); |
873 | if (sra) | |
874 | sysfs_free(sra); | |
875 | sra = sysfs_read(-1, devnum, GET_VERSION); | |
876 | verstr = sra->text_version ? : "-no-metadata-"; | |
877 | } | |
878 | ||
879 | for (i = 0; st == NULL && superlist[i] ; i++) | |
880 | st = superlist[i]->match_metadata_desc(verstr); | |
1686dc25 NB |
881 | |
882 | if (sra) | |
883 | sysfs_free(sra); | |
f7e7067b | 884 | if (st) { |
3b0896f8 | 885 | st->sb = NULL; |
f7e7067b NB |
886 | if (subarray) { |
887 | strncpy(st->subarray, subarray, 32); | |
888 | st->subarray[31] = 0; | |
889 | free(subarray); | |
890 | } else | |
891 | st->subarray[0] = 0; | |
892 | } | |
82d9eba6 | 893 | return st; |
f9ce90ba | 894 | } |
ea24acd0 NB |
895 | #endif /* !defined(MDASSEMBLE) || defined(MDASSEMBLE) && defined(MDASSEMBLE_AUTO) */ |
896 | ||
f9ce90ba | 897 | |
159c3a1a | 898 | struct supertype *dup_super(struct supertype *orig) |
3da92f27 | 899 | { |
159c3a1a | 900 | struct supertype *st; |
1686dc25 | 901 | |
d2ca6449 NB |
902 | if (!orig) |
903 | return orig; | |
159c3a1a | 904 | st = malloc(sizeof(*st)); |
3da92f27 NB |
905 | if (!st) |
906 | return st; | |
ef609477 | 907 | memset(st, 0, sizeof(*st)); |
159c3a1a NB |
908 | st->ss = orig->ss; |
909 | st->max_devs = orig->max_devs; | |
910 | st->minor_version = orig->minor_version; | |
f7e7067b | 911 | strcpy(st->subarray, orig->subarray); |
159c3a1a NB |
912 | st->sb = NULL; |
913 | st->info = NULL; | |
914 | return st; | |
3da92f27 NB |
915 | } |
916 | ||
82d9eba6 | 917 | struct supertype *guess_super(int fd) |
f9ce90ba NB |
918 | { |
919 | /* try each load_super to find the best match, | |
920 | * and return the best superswitch | |
921 | */ | |
82d9eba6 NB |
922 | struct superswitch *ss; |
923 | struct supertype *st; | |
570c0542 NB |
924 | unsigned long besttime = 0; |
925 | int bestsuper = -1; | |
f9ce90ba NB |
926 | int i; |
927 | ||
82d9eba6 | 928 | st = malloc(sizeof(*st)); |
f9ce90ba NB |
929 | for (i=0 ; superlist[i]; i++) { |
930 | int rv; | |
931 | ss = superlist[i]; | |
ef609477 | 932 | memset(st, 0, sizeof(*st)); |
3da92f27 | 933 | rv = ss->load_super(st, fd, NULL); |
570c0542 NB |
934 | if (rv == 0) { |
935 | struct mdinfo info; | |
3da92f27 | 936 | st->ss->getinfo_super(st, &info); |
570c0542 NB |
937 | if (bestsuper == -1 || |
938 | besttime < info.array.ctime) { | |
939 | bestsuper = i; | |
940 | besttime = info.array.ctime; | |
570c0542 | 941 | } |
3da92f27 | 942 | ss->free_super(st); |
570c0542 NB |
943 | } |
944 | } | |
945 | if (bestsuper != -1) { | |
946 | int rv; | |
ef609477 | 947 | memset(st, 0, sizeof(*st)); |
3da92f27 | 948 | rv = superlist[bestsuper]->load_super(st, fd, NULL); |
f9ce90ba | 949 | if (rv == 0) { |
5e747af2 | 950 | superlist[bestsuper]->free_super(st); |
82d9eba6 | 951 | return st; |
f9ce90ba NB |
952 | } |
953 | } | |
570c0542 | 954 | free(st); |
f9ce90ba NB |
955 | return NULL; |
956 | } | |
fe6729fa | 957 | |
beae1dfe NB |
958 | /* Return size of device in bytes */ |
959 | int get_dev_size(int fd, char *dname, unsigned long long *sizep) | |
960 | { | |
961 | unsigned long long ldsize; | |
c2c9bb6f NB |
962 | struct stat st; |
963 | ||
964 | if (fstat(fd, &st) != -1 && S_ISREG(st.st_mode)) | |
965 | ldsize = (unsigned long long)st.st_size; | |
966 | else | |
beae1dfe NB |
967 | #ifdef BLKGETSIZE64 |
968 | if (ioctl(fd, BLKGETSIZE64, &ldsize) != 0) | |
969 | #endif | |
970 | { | |
971 | unsigned long dsize; | |
972 | if (ioctl(fd, BLKGETSIZE, &dsize) == 0) { | |
973 | ldsize = dsize; | |
974 | ldsize <<= 9; | |
975 | } else { | |
976 | if (dname) | |
977 | fprintf(stderr, Name ": Cannot get size of %s: %s\b", | |
978 | dname, strerror(errno)); | |
979 | return 0; | |
980 | } | |
981 | } | |
982 | *sizep = ldsize; | |
983 | return 1; | |
984 | } | |
8fac0577 | 985 | |
8382f19b NB |
986 | void get_one_disk(int mdfd, mdu_array_info_t *ainf, mdu_disk_info_t *disk) |
987 | { | |
988 | int d; | |
989 | ioctl(mdfd, GET_ARRAY_INFO, ainf); | |
990 | for (d = 0 ; d < ainf->raid_disks + ainf->nr_disks ; d++) | |
991 | if (ioctl(mdfd, GET_DISK_INFO, disk) == 0) | |
992 | return; | |
993 | } | |
63152c1b | 994 | |
a322f70c DW |
995 | int open_container(int fd) |
996 | { | |
997 | /* 'fd' is a block device. Find out if it is in use | |
998 | * by a container, and return an open fd on that container. | |
999 | */ | |
1000 | char path[256]; | |
1001 | char *e; | |
1002 | DIR *dir; | |
1003 | struct dirent *de; | |
1004 | int dfd, n; | |
1005 | char buf[200]; | |
1006 | int major, minor; | |
1007 | struct stat st; | |
1008 | ||
1009 | if (fstat(fd, &st) != 0) | |
1010 | return -1; | |
1011 | sprintf(path, "/sys/dev/block/%d:%d/holders", | |
1012 | (int)major(st.st_rdev), (int)minor(st.st_rdev)); | |
1013 | e = path + strlen(path); | |
1014 | ||
1015 | dir = opendir(path); | |
1016 | if (!dir) | |
1017 | return -1; | |
1018 | while ((de = readdir(dir))) { | |
1019 | if (de->d_ino == 0) | |
1020 | continue; | |
1021 | if (de->d_name[0] == '.') | |
1022 | continue; | |
1023 | sprintf(e, "/%s/dev", de->d_name); | |
1024 | dfd = open(path, O_RDONLY); | |
1025 | if (dfd < 0) | |
1026 | continue; | |
1027 | n = read(dfd, buf, sizeof(buf)); | |
1028 | close(dfd); | |
1029 | if (n <= 0 || n >= sizeof(buf)) | |
1030 | continue; | |
1031 | buf[n] = 0; | |
1032 | if (sscanf(buf, "%d:%d", &major, &minor) != 2) | |
1033 | continue; | |
1034 | sprintf(buf, "%d:%d", major, minor); | |
1035 | dfd = dev_open(buf, O_RDONLY); | |
1036 | if (dfd >= 0) { | |
1037 | closedir(dir); | |
1038 | return dfd; | |
1039 | } | |
1040 | } | |
355726fa | 1041 | closedir(dir); |
a322f70c DW |
1042 | return -1; |
1043 | } | |
1044 | ||
7801ac20 N |
1045 | int add_disk(int mdfd, struct supertype *st, |
1046 | struct mdinfo *sra, struct mdinfo *info) | |
1047 | { | |
1048 | /* Add a device to an array, in one of 2 ways. */ | |
1049 | int rv; | |
1050 | #ifndef MDASSEMBLE | |
1051 | if (st->ss->external) { | |
1052 | rv = sysfs_add_disk(sra, info); | |
1053 | if (! rv) { | |
1054 | struct mdinfo *sd2; | |
f35f2525 N |
1055 | for (sd2 = sra->devs; sd2; sd2=sd2->next) |
1056 | if (sd2 == info) | |
1057 | break; | |
1058 | if (sd2 == NULL) { | |
1059 | sd2 = malloc(sizeof(*sd2)); | |
1060 | *sd2 = *info; | |
1061 | sd2->next = sra->devs; | |
1062 | sra->devs = sd2; | |
1063 | } | |
7801ac20 N |
1064 | } |
1065 | } else | |
1066 | #endif | |
1067 | rv = ioctl(mdfd, ADD_NEW_DISK, &info->disk); | |
1068 | return rv; | |
1069 | } | |
1070 | ||
f35f2525 N |
1071 | int set_array_info(int mdfd, struct supertype *st, struct mdinfo *info) |
1072 | { | |
1073 | /* Initialise kernel's knowledge of array. | |
1074 | * This varies between externally managed arrays | |
1075 | * and older kernels | |
1076 | */ | |
1077 | int vers = md_get_version(mdfd); | |
1078 | int rv; | |
1079 | ||
1080 | #ifndef MDASSEMBLE | |
1081 | if (st->ss->external) | |
1082 | rv = sysfs_set_array(info, vers); | |
1083 | else | |
1084 | #endif | |
1085 | if ((vers % 100) >= 1) { /* can use different versions */ | |
1086 | mdu_array_info_t inf; | |
1087 | memset(&inf, 0, sizeof(inf)); | |
1088 | inf.major_version = info->array.major_version; | |
1089 | inf.minor_version = info->array.minor_version; | |
1090 | rv = ioctl(mdfd, SET_ARRAY_INFO, &inf); | |
1091 | } else | |
1092 | rv = ioctl(mdfd, SET_ARRAY_INFO, NULL); | |
1093 | return rv; | |
1094 | } | |
1095 | ||
2f6079dc NB |
1096 | char *devnum2devname(int num) |
1097 | { | |
1098 | char name[100]; | |
1099 | if (num > 0) | |
1100 | sprintf(name, "md%d", num); | |
1101 | else | |
1102 | sprintf(name, "md_d%d", -1-num); | |
1103 | return strdup(name); | |
1104 | } | |
1105 | ||
77472ff8 NB |
1106 | int devname2devnum(char *name) |
1107 | { | |
1108 | char *ep; | |
1109 | int num; | |
1110 | if (strncmp(name, "md_d", 4)==0) | |
1111 | num = -1-strtoul(name+4, &ep, 10); | |
1112 | else | |
1113 | num = strtoul(name+2, &ep, 10); | |
1114 | return num; | |
1115 | } | |
1116 | ||
c94709e8 | 1117 | int stat2devnum(struct stat *st) |
2f6079dc | 1118 | { |
c94709e8 DW |
1119 | if ((S_IFMT & st->st_mode) == S_IFBLK) { |
1120 | if (major(st->st_rdev) == MD_MAJOR) | |
1121 | return minor(st->st_rdev); | |
2f6079dc | 1122 | else |
c94709e8 | 1123 | return -1- (minor(st->st_rdev)>>6); |
2f6079dc NB |
1124 | } |
1125 | return -1; | |
c94709e8 DW |
1126 | |
1127 | } | |
1128 | ||
1129 | int fd2devnum(int fd) | |
1130 | { | |
1131 | struct stat stb; | |
1132 | if (fstat(fd, &stb) == 0) | |
1133 | return stat2devnum(&stb); | |
1134 | return -1; | |
2f6079dc NB |
1135 | } |
1136 | ||
a931db9e NB |
1137 | int mdmon_running(int devnum) |
1138 | { | |
1139 | char path[100]; | |
1140 | char pid[10]; | |
1141 | int fd; | |
1142 | int n; | |
1143 | sprintf(path, "/var/run/mdadm/%s.pid", devnum2devname(devnum)); | |
1144 | fd = open(path, O_RDONLY, 0); | |
1145 | ||
1146 | if (fd < 0) | |
1147 | return 0; | |
1148 | n = read(fd, pid, 9); | |
1149 | close(fd); | |
1150 | if (n <= 0) | |
1151 | return 0; | |
1152 | if (kill(atoi(pid), 0) == 0) | |
1153 | return 1; | |
1154 | return 0; | |
1155 | } | |
1156 | ||
1157 | int signal_mdmon(int devnum) | |
1158 | { | |
1159 | char path[100]; | |
1160 | char pid[10]; | |
1161 | int fd; | |
1162 | int n; | |
1163 | sprintf(path, "/var/run/mdadm/%s.pid", devnum2devname(devnum)); | |
1164 | fd = open(path, O_RDONLY, 0); | |
1165 | ||
1166 | if (fd < 0) | |
1167 | return 0; | |
1168 | n = read(fd, pid, 9); | |
1169 | close(fd); | |
1170 | if (n <= 0) | |
1171 | return 0; | |
1172 | if (kill(atoi(pid), SIGUSR1) == 0) | |
1173 | return 1; | |
1174 | return 0; | |
1175 | } | |
1176 | ||
8850ee3e N |
1177 | int start_mdmon(int devnum) |
1178 | { | |
1179 | int i; | |
44d2e365 | 1180 | int len; |
9fe32043 N |
1181 | pid_t pid; |
1182 | int status; | |
44d2e365 N |
1183 | char pathbuf[1024]; |
1184 | char *paths[4] = { | |
1185 | pathbuf, | |
1186 | "/sbin/mdmon", | |
1187 | "mdmon", | |
1188 | NULL | |
1189 | }; | |
8850ee3e N |
1190 | |
1191 | if (env_no_mdmon()) | |
1192 | return 0; | |
1193 | ||
44d2e365 N |
1194 | len = readlink("/proc/self/exe", pathbuf, sizeof(pathbuf)); |
1195 | if (len > 0) { | |
1196 | char *sl; | |
1197 | pathbuf[len] = 0; | |
1198 | sl = strrchr(pathbuf, '/'); | |
1199 | if (sl) | |
1200 | sl++; | |
1201 | else | |
1202 | sl = pathbuf; | |
1203 | strcpy(sl, "mdmon"); | |
1204 | } else | |
1205 | pathbuf[0] = '\0'; | |
1206 | ||
8850ee3e N |
1207 | switch(fork()) { |
1208 | case 0: | |
1209 | /* FIXME yuk. CLOSE_EXEC?? */ | |
1210 | for (i=3; i < 100; i++) | |
1211 | close(i); | |
44d2e365 N |
1212 | for (i=0; paths[i]; i++) |
1213 | if (paths[i][0]) | |
1214 | execl(paths[i], "mdmon", | |
1215 | map_dev(dev2major(devnum), | |
1216 | dev2minor(devnum), | |
1217 | 1), NULL); | |
8850ee3e N |
1218 | exit(1); |
1219 | case -1: fprintf(stderr, Name ": cannot run mdmon. " | |
1220 | "Array remains readonly\n"); | |
1221 | return -1; | |
9fe32043 N |
1222 | default: /* parent - good */ |
1223 | pid = wait(&status); | |
1224 | if (pid < 0 || status != 0) | |
1225 | return -1; | |
8850ee3e N |
1226 | } |
1227 | return 0; | |
1228 | } | |
1229 | ||
5dcfcb71 DW |
1230 | int env_no_mdmon(void) |
1231 | { | |
1232 | char *val = getenv("MDADM_NO_MDMON"); | |
1233 | ||
1234 | if (val && atoi(val) == 1) | |
1235 | return 1; | |
1236 | ||
1237 | return 0; | |
1238 | } | |
1239 | ||
0e600426 | 1240 | #ifndef MDASSEMBLE |
edd8d13c NB |
1241 | int flush_metadata_updates(struct supertype *st) |
1242 | { | |
1243 | int sfd; | |
1244 | if (!st->updates) { | |
1245 | st->update_tail = NULL; | |
1246 | return -1; | |
1247 | } | |
1248 | ||
1249 | sfd = connect_monitor(devnum2devname(st->container_dev)); | |
1250 | if (sfd < 0) | |
1251 | return -1; | |
1252 | ||
1253 | while (st->updates) { | |
1254 | struct metadata_update *mu = st->updates; | |
1255 | st->updates = mu->next; | |
1256 | ||
1257 | send_message(sfd, mu, 0); | |
1258 | wait_reply(sfd, 0); | |
1259 | free(mu->buf); | |
1260 | free(mu); | |
1261 | } | |
1262 | ack(sfd, 0); | |
1263 | wait_reply(sfd, 0); | |
1264 | close(sfd); | |
1265 | st->update_tail = NULL; | |
1266 | return 0; | |
1267 | } | |
1268 | ||
1269 | void append_metadata_update(struct supertype *st, void *buf, int len) | |
1270 | { | |
1271 | ||
1272 | struct metadata_update *mu = malloc(sizeof(*mu)); | |
1273 | ||
1274 | mu->buf = buf; | |
1275 | mu->len = len; | |
1276 | mu->space = NULL; | |
1277 | mu->next = NULL; | |
1278 | *st->update_tail = mu; | |
1279 | st->update_tail = &mu->next; | |
1280 | } | |
71d60c48 DW |
1281 | |
1282 | struct superswitch *find_metadata_methods(char *vers) | |
1283 | { | |
1284 | if (strcmp(vers, "ddf") == 0) | |
1285 | return &super_ddf; | |
1286 | if (strcmp(vers, "imsm") == 0) | |
1287 | return &super_imsm; | |
1288 | return NULL; | |
1289 | } | |
0e600426 | 1290 | #endif /* MDASSEMBLE */ |
a931db9e | 1291 | |
fe6729fa NB |
1292 | #ifdef __TINYC__ |
1293 | /* tinyc doesn't optimize this check in ioctl.h out ... */ | |
1294 | unsigned int __invalid_size_argument_for_IOC = 0; | |
1295 | #endif | |
1296 |