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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 | ||
f277ce36 | 225 | int same_uuid(int a[4], int b[4], int swapuuid) |
64c4757e | 226 | { |
f277ce36 NB |
227 | if (swapuuid) { |
228 | /* parse uuids are hostendian. | |
229 | * uuid's from some superblocks are big-ending | |
aba69144 | 230 | * if there is a difference, we need to swap.. |
f277ce36 NB |
231 | */ |
232 | unsigned char *ac = (unsigned char *)a; | |
233 | unsigned char *bc = (unsigned char *)b; | |
234 | int i; | |
235 | for (i=0; i<16; i+= 4) { | |
236 | if (ac[i+0] != bc[i+3] || | |
237 | ac[i+1] != bc[i+2] || | |
238 | ac[i+2] != bc[i+1] || | |
239 | ac[i+3] != bc[i+0]) | |
240 | return 0; | |
241 | } | |
242 | return 1; | |
243 | } else { | |
244 | if (a[0]==b[0] && | |
245 | a[1]==b[1] && | |
246 | a[2]==b[2] && | |
247 | a[3]==b[3]) | |
248 | return 1; | |
249 | return 0; | |
250 | } | |
64c4757e | 251 | } |
350f29f9 NB |
252 | void copy_uuid(void *a, int b[4], int swapuuid) |
253 | { | |
254 | if (swapuuid) { | |
255 | /* parse uuids are hostendian. | |
256 | * uuid's from some superblocks are big-ending | |
257 | * if there is a difference, we need to swap.. | |
258 | */ | |
259 | unsigned char *ac = (unsigned char *)a; | |
260 | unsigned char *bc = (unsigned char *)b; | |
261 | int i; | |
262 | for (i=0; i<16; i+= 4) { | |
263 | ac[i+0] = bc[i+3]; | |
264 | ac[i+1] = bc[i+2]; | |
265 | ac[i+2] = bc[i+1]; | |
266 | ac[i+3] = bc[i+0]; | |
267 | } | |
268 | } else | |
269 | memcpy(a, b, 16); | |
270 | } | |
64c4757e | 271 | |
435d4ebb | 272 | #ifndef MDASSEMBLE |
682c7051 NB |
273 | int check_ext2(int fd, char *name) |
274 | { | |
275 | /* | |
276 | * Check for an ext2fs file system. | |
277 | * Superblock is always 1K at 1K offset | |
278 | * | |
279 | * s_magic is le16 at 56 == 0xEF53 | |
280 | * report mtime - le32 at 44 | |
281 | * blocks - le32 at 4 | |
282 | * logblksize - le32 at 24 | |
283 | */ | |
284 | unsigned char sb[1024]; | |
285 | time_t mtime; | |
286 | int size, bsize; | |
287 | if (lseek(fd, 1024,0)!= 1024) | |
288 | return 0; | |
289 | if (read(fd, sb, 1024)!= 1024) | |
290 | return 0; | |
291 | if (sb[56] != 0x53 || sb[57] != 0xef) | |
292 | return 0; | |
293 | ||
294 | mtime = sb[44]|(sb[45]|(sb[46]|sb[47]<<8)<<8)<<8; | |
295 | bsize = sb[24]|(sb[25]|(sb[26]|sb[27]<<8)<<8)<<8; | |
296 | size = sb[4]|(sb[5]|(sb[6]|sb[7]<<8)<<8)<<8; | |
297 | fprintf(stderr, Name ": %s appears to contain an ext2fs file system\n", | |
298 | name); | |
299 | fprintf(stderr," size=%dK mtime=%s", | |
300 | size*(1<<bsize), ctime(&mtime)); | |
301 | return 1; | |
302 | } | |
303 | ||
304 | int check_reiser(int fd, char *name) | |
305 | { | |
306 | /* | |
307 | * superblock is at 64K | |
308 | * size is 1024; | |
309 | * Magic string "ReIsErFs" or "ReIsEr2Fs" at 52 | |
310 | * | |
311 | */ | |
312 | unsigned char sb[1024]; | |
881990a2 | 313 | unsigned long size; |
682c7051 NB |
314 | if (lseek(fd, 64*1024, 0) != 64*1024) |
315 | return 0; | |
316 | if (read(fd, sb, 1024) != 1024) | |
317 | return 0; | |
a46f4061 NB |
318 | if (strncmp((char*)sb+52, "ReIsErFs",8)!=0 && |
319 | strncmp((char*)sb+52, "ReIsEr2Fs",9)!=0) | |
682c7051 NB |
320 | return 0; |
321 | fprintf(stderr, Name ": %s appears to contain a reiserfs file system\n",name); | |
322 | size = sb[0]|(sb[1]|(sb[2]|sb[3]<<8)<<8)<<8; | |
881990a2 | 323 | fprintf(stderr, " size = %luK\n", size*4); |
aba69144 | 324 | |
682c7051 NB |
325 | return 1; |
326 | } | |
327 | ||
328 | int check_raid(int fd, char *name) | |
329 | { | |
4b1ac34b | 330 | struct mdinfo info; |
682c7051 | 331 | time_t crtime; |
d078d77c | 332 | char *level; |
82d9eba6 | 333 | struct supertype *st = guess_super(fd); |
f9ce90ba | 334 | |
82d9eba6 | 335 | if (!st) return 0; |
3da92f27 | 336 | st->ss->load_super(st, fd, name); |
82d9eba6 NB |
337 | /* Looks like a raid array .. */ |
338 | fprintf(stderr, Name ": %s appears to be part of a raid array:\n", | |
339 | name); | |
3da92f27 NB |
340 | st->ss->getinfo_super(st, &info); |
341 | st->ss->free_super(st); | |
82d9eba6 | 342 | crtime = info.array.ctime; |
d078d77c NB |
343 | level = map_num(pers, info.array.level); |
344 | if (!level) level = "-unknown-"; | |
345 | fprintf(stderr, " level=%s devices=%d ctime=%s", | |
346 | level, info.array.raid_disks, ctime(&crtime)); | |
82d9eba6 | 347 | return 1; |
682c7051 NB |
348 | } |
349 | ||
682c7051 NB |
350 | int ask(char *mesg) |
351 | { | |
352 | char *add = ""; | |
353 | int i; | |
354 | for (i=0; i<5; i++) { | |
355 | char buf[100]; | |
356 | fprintf(stderr, "%s%s", mesg, add); | |
357 | fflush(stderr); | |
358 | if (fgets(buf, 100, stdin)==NULL) | |
359 | return 0; | |
360 | if (buf[0]=='y' || buf[0]=='Y') | |
361 | return 1; | |
362 | if (buf[0]=='n' || buf[0]=='N') | |
363 | return 0; | |
364 | add = "(y/n) "; | |
365 | } | |
366 | fprintf(stderr, Name ": assuming 'no'\n"); | |
367 | return 0; | |
368 | } | |
435d4ebb | 369 | #endif /* MDASSEMBLE */ |
682c7051 NB |
370 | |
371 | char *map_num(mapping_t *map, int num) | |
372 | { | |
373 | while (map->name) { | |
374 | if (map->num == num) | |
375 | return map->name; | |
376 | map++; | |
377 | } | |
378 | return NULL; | |
379 | } | |
380 | ||
381 | int map_name(mapping_t *map, char *name) | |
382 | { | |
383 | while (map->name) { | |
384 | if (strcmp(map->name, name)==0) | |
385 | return map->num; | |
386 | map++; | |
387 | } | |
98c6faba | 388 | return UnSet; |
682c7051 | 389 | } |
82b27616 | 390 | |
e5329c37 | 391 | |
8d80900b | 392 | int is_standard(char *dev, int *nump) |
e5329c37 NB |
393 | { |
394 | /* tests if dev is a "standard" md dev name. | |
395 | * i.e if the last component is "/dNN" or "/mdNN", | |
aba69144 | 396 | * where NN is a string of digits |
598f0d58 NB |
397 | * Returns 1 if a partitionable standard, |
398 | * -1 if non-partitonable, | |
399 | * 0 if not a standard name. | |
e5329c37 | 400 | */ |
8d80900b NB |
401 | char *d = strrchr(dev, '/'); |
402 | int type=0; | |
403 | int num; | |
404 | if (!d) | |
e5329c37 | 405 | return 0; |
8d80900b NB |
406 | if (strncmp(d, "/d",2)==0) |
407 | d += 2, type=1; /* /dev/md/dN{pM} */ | |
408 | else if (strncmp(d, "/md_d", 5)==0) | |
409 | d += 5, type=1; /* /dev/md_dNpM */ | |
410 | else if (strncmp(d, "/md", 3)==0) | |
411 | d += 3, type=-1; /* /dev/mdN */ | |
412 | else if (d-dev > 3 && strncmp(d-2, "md/", 3)==0) | |
5a6d1148 | 413 | d += 1, type=-1; /* /dev/md/N */ |
e5329c37 NB |
414 | else |
415 | return 0; | |
8d80900b | 416 | if (!*d) |
e5329c37 | 417 | return 0; |
8d80900b NB |
418 | num = atoi(d); |
419 | while (isdigit(*d)) | |
420 | d++; | |
421 | if (*d) | |
e5329c37 | 422 | return 0; |
8d80900b NB |
423 | if (nump) *nump = num; |
424 | ||
425 | return type; | |
e5329c37 NB |
426 | } |
427 | ||
428 | ||
82b27616 NB |
429 | /* |
430 | * convert a major/minor pair for a block device into a name in /dev, if possible. | |
431 | * On the first call, walk /dev collecting name. | |
432 | * Put them in a simple linked listfor now. | |
433 | */ | |
434 | struct devmap { | |
435 | int major, minor; | |
436 | char *name; | |
437 | struct devmap *next; | |
438 | } *devlist = NULL; | |
439 | int devlist_ready = 0; | |
440 | ||
82b27616 NB |
441 | int add_dev(const char *name, const struct stat *stb, int flag, struct FTW *s) |
442 | { | |
bed256c2 NB |
443 | struct stat st; |
444 | if (S_ISLNK(stb->st_mode)) { | |
445 | stat(name, &st); | |
446 | stb = &st; | |
82b27616 | 447 | } |
bed256c2 NB |
448 | |
449 | if ((stb->st_mode&S_IFMT)== S_IFBLK) { | |
450 | char *n = strdup(name); | |
451 | struct devmap *dm = malloc(sizeof(*dm)); | |
452 | if (strncmp(n, "/dev/./", 7)==0) | |
453 | strcpy(n+4, name+6); | |
454 | if (dm) { | |
455 | dm->major = major(stb->st_rdev); | |
456 | dm->minor = minor(stb->st_rdev); | |
457 | dm->name = n; | |
458 | dm->next = devlist; | |
459 | devlist = dm; | |
460 | } | |
461 | } | |
462 | return 0; | |
82b27616 NB |
463 | } |
464 | ||
45e878bb NB |
465 | #ifndef HAVE_NFTW |
466 | #ifdef HAVE_FTW | |
467 | int add_dev_1(const char *name, const struct stat *stb, int flag) | |
468 | { | |
469 | return add_dev(name, stb, flag, NULL); | |
470 | } | |
471 | int nftw(const char *path, int (*han)(const char *name, const struct stat *stb, int flag, struct FTW *s), int nopenfd, int flags) | |
472 | { | |
473 | return ftw(path, add_dev_1, nopenfd); | |
474 | } | |
475 | #else | |
45e878bb NB |
476 | int nftw(const char *path, int (*han)(const char *name, const struct stat *stb, int flag, struct FTW *s), int nopenfd, int flags) |
477 | { | |
478 | return 0; | |
479 | } | |
480 | #endif /* HAVE_FTW */ | |
481 | #endif /* HAVE_NFTW */ | |
482 | ||
dd0781e5 NB |
483 | /* |
484 | * Find a block device with the right major/minor number. | |
b79713f8 NB |
485 | * If we find multiple names, choose the shortest. |
486 | * If we find a non-standard name, it is probably there | |
487 | * deliberately so prefer it over a standard name. | |
488 | * This applies only to names for MD devices. | |
dd0781e5 | 489 | */ |
16c6fa80 | 490 | char *map_dev(int major, int minor, int create) |
82b27616 | 491 | { |
dd0781e5 | 492 | struct devmap *p; |
b79713f8 | 493 | char *std = NULL, *nonstd=NULL; |
e7bb5d23 | 494 | int did_check = 0; |
eed35d66 | 495 | |
e81cdd9f | 496 | if (major == 0 && minor == 0) |
eed35d66 | 497 | return NULL; |
e81cdd9f | 498 | |
e7bb5d23 | 499 | retry: |
dd0781e5 | 500 | if (!devlist_ready) { |
0a416ec3 NB |
501 | char *dev = "/dev"; |
502 | struct stat stb; | |
eed35d66 NB |
503 | while(devlist) { |
504 | struct devmap *d = devlist; | |
505 | devlist = d->next; | |
506 | free(d->name); | |
507 | free(d); | |
508 | } | |
0a416ec3 NB |
509 | if (lstat(dev, &stb)==0 && |
510 | S_ISLNK(stb.st_mode)) | |
511 | dev = "/dev/."; | |
512 | nftw(dev, add_dev, 10, FTW_PHYS); | |
dd0781e5 | 513 | devlist_ready=1; |
e7bb5d23 | 514 | did_check = 1; |
dd0781e5 | 515 | } |
82b27616 | 516 | |
dd0781e5 NB |
517 | for (p=devlist; p; p=p->next) |
518 | if (p->major == major && | |
519 | p->minor == minor) { | |
b79713f8 NB |
520 | if (is_standard(p->name, NULL)) { |
521 | if (std == NULL || | |
522 | strlen(p->name) < strlen(std)) | |
523 | std = p->name; | |
524 | } else { | |
525 | if (nonstd == NULL || | |
526 | strlen(p->name) < strlen(nonstd)) | |
527 | nonstd = p->name; | |
528 | } | |
dd0781e5 | 529 | } |
e7bb5d23 NB |
530 | if (!std && !nonstd && !did_check) { |
531 | devlist_ready = 0; | |
532 | goto retry; | |
533 | } | |
16c6fa80 NB |
534 | if (create && !std && !nonstd) { |
535 | static char buf[30]; | |
382245c3 | 536 | snprintf(buf, sizeof(buf), "%d:%d", major, minor); |
16c6fa80 NB |
537 | nonstd = buf; |
538 | } | |
539 | ||
b79713f8 | 540 | return nonstd ? nonstd : std; |
82b27616 NB |
541 | } |
542 | ||
4b1ac34b | 543 | unsigned long calc_csum(void *super, int bytes) |
82b27616 | 544 | { |
56eb10c0 | 545 | unsigned long long newcsum = 0; |
82b27616 | 546 | int i; |
4b1ac34b NB |
547 | unsigned int csum; |
548 | unsigned int *superc = (unsigned int*) super; | |
82b27616 | 549 | |
4b1ac34b | 550 | for(i=0; i<bytes/4; i++) |
82b27616 NB |
551 | newcsum+= superc[i]; |
552 | csum = (newcsum& 0xffffffff) + (newcsum>>32); | |
570c0542 | 553 | #ifdef __alpha__ |
aba69144 | 554 | /* The in-kernel checksum calculation is always 16bit on |
570c0542 NB |
555 | * the alpha, though it is 32 bit on i386... |
556 | * I wonder what it is elsewhere... (it uses and API in | |
557 | * a way that it shouldn't). | |
558 | */ | |
559 | csum = (csum & 0xffff) + (csum >> 16); | |
560 | csum = (csum & 0xffff) + (csum >> 16); | |
561 | #endif | |
82b27616 NB |
562 | return csum; |
563 | } | |
cd29a5c8 | 564 | |
435d4ebb | 565 | #ifndef MDASSEMBLE |
56eb10c0 | 566 | char *human_size(long long bytes) |
cd29a5c8 NB |
567 | { |
568 | static char buf[30]; | |
d5d3721e NB |
569 | |
570 | /* We convert bytes to either centi-M{ega,ibi}bytes or | |
571 | * centi-G{igi,ibi}bytes, with appropriate rounding, | |
572 | * and then print 1/100th of those as a decimal. | |
573 | * We allow upto 2048Megabytes before converting to | |
574 | * gigabytes, as that shows more precision and isn't | |
575 | * too large a number. | |
576 | * Terrabytes are not yet handled. | |
577 | */ | |
cd29a5c8 | 578 | |
56eb10c0 | 579 | if (bytes < 5000*1024) |
cd29a5c8 | 580 | buf[0]=0; |
d5d3721e NB |
581 | else if (bytes < 2*1024LL*1024LL*1024LL) { |
582 | long cMiB = (bytes / ( (1LL<<20) / 200LL ) +1) /2; | |
583 | long cMB = (bytes / ( 1000000LL / 200LL ) +1) /2; | |
8f23b0b3 | 584 | snprintf(buf, sizeof(buf), " (%ld.%02ld MiB %ld.%02ld MB)", |
d5d3721e NB |
585 | cMiB/100 , cMiB % 100, |
586 | cMB/100, cMB % 100); | |
587 | } else { | |
588 | long cGiB = (bytes / ( (1LL<<30) / 200LL ) +1) /2; | |
589 | long cGB = (bytes / (1000000000LL/200LL ) +1) /2; | |
8f23b0b3 | 590 | snprintf(buf, sizeof(buf), " (%ld.%02ld GiB %ld.%02ld GB)", |
d5d3721e NB |
591 | cGiB/100 , cGiB % 100, |
592 | cGB/100, cGB % 100); | |
593 | } | |
cd29a5c8 NB |
594 | return buf; |
595 | } | |
e0d19036 NB |
596 | |
597 | char *human_size_brief(long long bytes) | |
598 | { | |
599 | static char buf[30]; | |
e0d19036 NB |
600 | |
601 | if (bytes < 5000*1024) | |
8f23b0b3 | 602 | snprintf(buf, sizeof(buf), "%ld.%02ldKiB", |
bd526cee | 603 | (long)(bytes>>10), (long)(((bytes&1023)*100+512)/1024) |
e0d19036 NB |
604 | ); |
605 | else if (bytes < 2*1024LL*1024LL*1024LL) | |
8f23b0b3 | 606 | snprintf(buf, sizeof(buf), "%ld.%02ldMiB", |
e0d19036 | 607 | (long)(bytes>>20), |
bd526cee | 608 | (long)((bytes&0xfffff)+0x100000/200)/(0x100000/100) |
e0d19036 NB |
609 | ); |
610 | else | |
8f23b0b3 | 611 | snprintf(buf, sizeof(buf), "%ld.%02ldGiB", |
e0d19036 | 612 | (long)(bytes>>30), |
bd526cee | 613 | (long)(((bytes>>10)&0xfffff)+0x100000/200)/(0x100000/100) |
e0d19036 NB |
614 | ); |
615 | return buf; | |
616 | } | |
435d4ebb | 617 | #endif |
e0d19036 | 618 | |
5f8097be NB |
619 | unsigned long long calc_array_size(int level, int raid_disks, int layout, |
620 | int chunksize, unsigned long long devsize) | |
621 | { | |
622 | int data_disks = 0; | |
623 | switch (level) { | |
624 | case 0: data_disks = raid_disks; break; | |
625 | case 1: data_disks = 1; break; | |
626 | case 4: | |
627 | case 5: data_disks = raid_disks - 1; break; | |
628 | case 6: data_disks = raid_disks - 2; break; | |
629 | case 10: data_disks = raid_disks / (layout & 255) / ((layout>>8)&255); | |
630 | break; | |
631 | } | |
632 | devsize &= ~(unsigned long long)((chunksize>>9)-1); | |
633 | return data_disks * devsize; | |
634 | } | |
635 | ||
435d4ebb | 636 | #if !defined(MDASSEMBLE) || defined(MDASSEMBLE) && defined(MDASSEMBLE_AUTO) |
dd0781e5 | 637 | int get_mdp_major(void) |
98c6faba | 638 | { |
dd0781e5 NB |
639 | static int mdp_major = -1; |
640 | FILE *fl; | |
98c6faba NB |
641 | char *w; |
642 | int have_block = 0; | |
643 | int have_devices = 0; | |
644 | int last_num = -1; | |
dd0781e5 NB |
645 | |
646 | if (mdp_major != -1) | |
647 | return mdp_major; | |
648 | fl = fopen("/proc/devices", "r"); | |
98c6faba | 649 | if (!fl) |
dd0781e5 | 650 | return -1; |
98c6faba NB |
651 | while ((w = conf_word(fl, 1))) { |
652 | if (have_block && strcmp(w, "devices:")==0) | |
653 | have_devices = 1; | |
654 | have_block = (strcmp(w, "Block")==0); | |
655 | if (isdigit(w[0])) | |
656 | last_num = atoi(w); | |
657 | if (have_devices && strcmp(w, "mdp")==0) | |
658 | mdp_major = last_num; | |
659 | free(w); | |
660 | } | |
661 | fclose(fl); | |
dd0781e5 | 662 | return mdp_major; |
98c6faba NB |
663 | } |
664 | ||
665 | ||
e0d19036 | 666 | |
e0d19036 NB |
667 | char *get_md_name(int dev) |
668 | { | |
669 | /* find /dev/md%d or /dev/md/%d or make a device /dev/.tmp.md%d */ | |
98c6faba | 670 | /* if dev < 0, want /dev/md/d%d or find mdp in /proc/devices ... */ |
e0d19036 NB |
671 | static char devname[50]; |
672 | struct stat stb; | |
98c6faba | 673 | dev_t rdev; |
dd0781e5 | 674 | char *dn; |
98c6faba NB |
675 | |
676 | if (dev < 0) { | |
dd0781e5 NB |
677 | int mdp = get_mdp_major(); |
678 | if (mdp < 0) return NULL; | |
0df46c2a | 679 | rdev = makedev(mdp, (-1-dev)<<6); |
8f23b0b3 | 680 | snprintf(devname, sizeof(devname), "/dev/md/d%d", -1-dev); |
98c6faba NB |
681 | if (stat(devname, &stb) == 0 |
682 | && (S_IFMT&stb.st_mode) == S_IFBLK | |
683 | && (stb.st_rdev == rdev)) | |
684 | return devname; | |
685 | } else { | |
0df46c2a | 686 | rdev = makedev(MD_MAJOR, dev); |
8f23b0b3 | 687 | snprintf(devname, sizeof(devname), "/dev/md%d", dev); |
98c6faba NB |
688 | if (stat(devname, &stb) == 0 |
689 | && (S_IFMT&stb.st_mode) == S_IFBLK | |
690 | && (stb.st_rdev == rdev)) | |
691 | return devname; | |
692 | ||
8f23b0b3 | 693 | snprintf(devname, sizeof(devname), "/dev/md/%d", dev); |
98c6faba NB |
694 | if (stat(devname, &stb) == 0 |
695 | && (S_IFMT&stb.st_mode) == S_IFBLK | |
696 | && (stb.st_rdev == rdev)) | |
697 | return devname; | |
698 | } | |
16c6fa80 | 699 | dn = map_dev(major(rdev), minor(rdev), 0); |
dd0781e5 NB |
700 | if (dn) |
701 | return dn; | |
8f23b0b3 | 702 | snprintf(devname, sizeof(devname), "/dev/.tmp.md%d", dev); |
e0d19036 | 703 | if (mknod(devname, S_IFBLK | 0600, rdev) == -1) |
dd0781e5 NB |
704 | if (errno != EEXIST) |
705 | return NULL; | |
e0d19036 NB |
706 | |
707 | if (stat(devname, &stb) == 0 | |
708 | && (S_IFMT&stb.st_mode) == S_IFBLK | |
709 | && (stb.st_rdev == rdev)) | |
710 | return devname; | |
711 | unlink(devname); | |
712 | return NULL; | |
713 | } | |
714 | ||
715 | void put_md_name(char *name) | |
716 | { | |
717 | if (strncmp(name, "/dev/.tmp.md", 12)==0) | |
718 | unlink(name); | |
719 | } | |
ea24acd0 | 720 | |
ea24acd0 NB |
721 | int find_free_devnum(int use_partitions) |
722 | { | |
723 | int devnum; | |
724 | for (devnum = 127; devnum != 128; | |
725 | devnum = devnum ? devnum-1 : (1<<22)-1) { | |
726 | char *dn; | |
727 | int _devnum; | |
728 | ||
729 | _devnum = use_partitions ? (-1-devnum) : devnum; | |
730 | if (mddev_busy(_devnum)) | |
731 | continue; | |
732 | /* make sure it is new to /dev too, at least as a | |
733 | * non-standard */ | |
734 | dn = map_dev(dev2major(_devnum), dev2minor(_devnum), 0); | |
735 | if (dn && ! is_standard(dn, NULL)) | |
736 | continue; | |
737 | break; | |
738 | } | |
739 | if (devnum == 128) | |
740 | return NoMdDev; | |
741 | return use_partitions ? (-1-devnum) : devnum; | |
742 | } | |
435d4ebb | 743 | #endif /* !defined(MDASSEMBLE) || defined(MDASSEMBLE) && defined(MDASSEMBLE_AUTO) */ |
f9ce90ba | 744 | |
8b0dabea NB |
745 | int dev_open(char *dev, int flags) |
746 | { | |
747 | /* like 'open', but if 'dev' matches %d:%d, create a temp | |
748 | * block device and open that | |
749 | */ | |
750 | char *e; | |
751 | int fd = -1; | |
752 | char devname[32]; | |
e81cdd9f | 753 | int major; |
8b0dabea | 754 | int minor; |
e81cdd9f NB |
755 | |
756 | if (!dev) return -1; | |
757 | ||
758 | major = strtoul(dev, &e, 0); | |
8b0dabea NB |
759 | if (e > dev && *e == ':' && e[1] && |
760 | (minor = strtoul(e+1, &e, 0)) >= 0 && | |
761 | *e == 0) { | |
8c210183 NB |
762 | snprintf(devname, sizeof(devname), "/dev/.tmp.md.%d:%d:%d", |
763 | (int)getpid(), major, minor); | |
8b0dabea | 764 | if (mknod(devname, S_IFBLK|0600, makedev(major, minor))==0) { |
6416d527 | 765 | fd = open(devname, flags|O_DIRECT); |
8b0dabea NB |
766 | unlink(devname); |
767 | } | |
768 | } else | |
6416d527 | 769 | fd = open(dev, flags|O_DIRECT); |
8b0dabea NB |
770 | return fd; |
771 | } | |
f9ce90ba | 772 | |
a931db9e NB |
773 | int open_dev_excl(int devnum) |
774 | { | |
775 | char buf[20]; | |
776 | int i; | |
777 | ||
778 | sprintf(buf, "%d:%d", dev2major(devnum), dev2minor(devnum)); | |
779 | for (i=0 ; i<25 ; i++) { | |
780 | int fd = dev_open(buf, O_RDWR|O_EXCL); | |
781 | if (fd >= 0) | |
782 | return fd; | |
783 | if (errno != EBUSY) | |
784 | return fd; | |
785 | usleep(200000); | |
786 | } | |
787 | return -1; | |
788 | } | |
789 | ||
cdddbdbc | 790 | struct superswitch *superlist[] = { &super0, &super1, &super_ddf, &super_imsm, NULL }; |
f9ce90ba | 791 | |
ea24acd0 | 792 | #if !defined(MDASSEMBLE) || defined(MDASSEMBLE) && defined(MDASSEMBLE_AUTO) |
f7dd881f | 793 | |
1686dc25 | 794 | struct supertype *super_by_fd(int fd) |
f9ce90ba | 795 | { |
1686dc25 NB |
796 | mdu_array_info_t array; |
797 | int vers; | |
798 | int minor; | |
799 | struct supertype *st = NULL; | |
7e0f6979 | 800 | struct mdinfo *sra; |
142cb9e1 | 801 | char *verstr; |
1686dc25 NB |
802 | char version[20]; |
803 | int i; | |
f7e7067b | 804 | char *subarray = NULL; |
1686dc25 NB |
805 | |
806 | sra = sysfs_read(fd, 0, GET_VERSION); | |
807 | ||
808 | if (sra) { | |
7e0f6979 NB |
809 | vers = sra->array.major_version; |
810 | minor = sra->array.minor_version; | |
142cb9e1 | 811 | verstr = sra->text_version; |
1686dc25 NB |
812 | } else { |
813 | if (ioctl(fd, GET_ARRAY_INFO, &array)) | |
814 | array.major_version = array.minor_version = 0; | |
815 | vers = array.major_version; | |
816 | minor = array.minor_version; | |
142cb9e1 | 817 | verstr = ""; |
6fbba4c9 | 818 | } |
82d9eba6 | 819 | |
1686dc25 NB |
820 | if (vers != -1) { |
821 | sprintf(version, "%d.%d", vers, minor); | |
822 | verstr = version; | |
6fbba4c9 | 823 | } |
3c558363 | 824 | if (minor == -2 && is_subarray(verstr)) { |
f7e7067b NB |
825 | char *dev = verstr+1; |
826 | subarray = strchr(dev, '/'); | |
827 | int devnum; | |
828 | if (subarray) | |
829 | *subarray++ = '\0'; | |
77472ff8 | 830 | devnum = devname2devnum(dev); |
f7e7067b NB |
831 | subarray = strdup(subarray); |
832 | if (sra) | |
833 | sysfs_free(sra); | |
834 | sra = sysfs_read(-1, devnum, GET_VERSION); | |
835 | verstr = sra->text_version ? : "-no-metadata-"; | |
836 | } | |
837 | ||
838 | for (i = 0; st == NULL && superlist[i] ; i++) | |
839 | st = superlist[i]->match_metadata_desc(verstr); | |
1686dc25 NB |
840 | |
841 | if (sra) | |
842 | sysfs_free(sra); | |
f7e7067b | 843 | if (st) { |
3b0896f8 | 844 | st->sb = NULL; |
f7e7067b NB |
845 | if (subarray) { |
846 | strncpy(st->subarray, subarray, 32); | |
847 | st->subarray[31] = 0; | |
848 | free(subarray); | |
849 | } else | |
850 | st->subarray[0] = 0; | |
851 | } | |
82d9eba6 | 852 | return st; |
f9ce90ba | 853 | } |
ea24acd0 NB |
854 | #endif /* !defined(MDASSEMBLE) || defined(MDASSEMBLE) && defined(MDASSEMBLE_AUTO) */ |
855 | ||
f9ce90ba | 856 | |
159c3a1a | 857 | struct supertype *dup_super(struct supertype *orig) |
3da92f27 | 858 | { |
159c3a1a | 859 | struct supertype *st; |
1686dc25 | 860 | |
d2ca6449 NB |
861 | if (!orig) |
862 | return orig; | |
159c3a1a | 863 | st = malloc(sizeof(*st)); |
3da92f27 NB |
864 | if (!st) |
865 | return st; | |
ef609477 | 866 | memset(st, 0, sizeof(*st)); |
159c3a1a NB |
867 | st->ss = orig->ss; |
868 | st->max_devs = orig->max_devs; | |
869 | st->minor_version = orig->minor_version; | |
f7e7067b | 870 | strcpy(st->subarray, orig->subarray); |
159c3a1a NB |
871 | st->sb = NULL; |
872 | st->info = NULL; | |
873 | return st; | |
3da92f27 NB |
874 | } |
875 | ||
82d9eba6 | 876 | struct supertype *guess_super(int fd) |
f9ce90ba NB |
877 | { |
878 | /* try each load_super to find the best match, | |
879 | * and return the best superswitch | |
880 | */ | |
82d9eba6 NB |
881 | struct superswitch *ss; |
882 | struct supertype *st; | |
570c0542 NB |
883 | unsigned long besttime = 0; |
884 | int bestsuper = -1; | |
f9ce90ba NB |
885 | int i; |
886 | ||
82d9eba6 | 887 | st = malloc(sizeof(*st)); |
f9ce90ba NB |
888 | for (i=0 ; superlist[i]; i++) { |
889 | int rv; | |
890 | ss = superlist[i]; | |
ef609477 | 891 | memset(st, 0, sizeof(*st)); |
3da92f27 | 892 | rv = ss->load_super(st, fd, NULL); |
570c0542 NB |
893 | if (rv == 0) { |
894 | struct mdinfo info; | |
3da92f27 | 895 | st->ss->getinfo_super(st, &info); |
570c0542 NB |
896 | if (bestsuper == -1 || |
897 | besttime < info.array.ctime) { | |
898 | bestsuper = i; | |
899 | besttime = info.array.ctime; | |
570c0542 | 900 | } |
3da92f27 | 901 | ss->free_super(st); |
570c0542 NB |
902 | } |
903 | } | |
904 | if (bestsuper != -1) { | |
905 | int rv; | |
ef609477 | 906 | memset(st, 0, sizeof(*st)); |
3da92f27 | 907 | rv = superlist[bestsuper]->load_super(st, fd, NULL); |
f9ce90ba | 908 | if (rv == 0) { |
5e747af2 | 909 | superlist[bestsuper]->free_super(st); |
82d9eba6 | 910 | return st; |
f9ce90ba NB |
911 | } |
912 | } | |
570c0542 | 913 | free(st); |
f9ce90ba NB |
914 | return NULL; |
915 | } | |
fe6729fa | 916 | |
beae1dfe NB |
917 | /* Return size of device in bytes */ |
918 | int get_dev_size(int fd, char *dname, unsigned long long *sizep) | |
919 | { | |
920 | unsigned long long ldsize; | |
c2c9bb6f NB |
921 | struct stat st; |
922 | ||
923 | if (fstat(fd, &st) != -1 && S_ISREG(st.st_mode)) | |
924 | ldsize = (unsigned long long)st.st_size; | |
925 | else | |
beae1dfe NB |
926 | #ifdef BLKGETSIZE64 |
927 | if (ioctl(fd, BLKGETSIZE64, &ldsize) != 0) | |
928 | #endif | |
929 | { | |
930 | unsigned long dsize; | |
931 | if (ioctl(fd, BLKGETSIZE, &dsize) == 0) { | |
932 | ldsize = dsize; | |
933 | ldsize <<= 9; | |
934 | } else { | |
935 | if (dname) | |
936 | fprintf(stderr, Name ": Cannot get size of %s: %s\b", | |
937 | dname, strerror(errno)); | |
938 | return 0; | |
939 | } | |
940 | } | |
941 | *sizep = ldsize; | |
942 | return 1; | |
943 | } | |
8fac0577 | 944 | |
8382f19b NB |
945 | void get_one_disk(int mdfd, mdu_array_info_t *ainf, mdu_disk_info_t *disk) |
946 | { | |
947 | int d; | |
948 | ioctl(mdfd, GET_ARRAY_INFO, ainf); | |
949 | for (d = 0 ; d < ainf->raid_disks + ainf->nr_disks ; d++) | |
950 | if (ioctl(mdfd, GET_DISK_INFO, disk) == 0) | |
951 | return; | |
952 | } | |
63152c1b | 953 | |
a322f70c DW |
954 | int open_container(int fd) |
955 | { | |
956 | /* 'fd' is a block device. Find out if it is in use | |
957 | * by a container, and return an open fd on that container. | |
958 | */ | |
959 | char path[256]; | |
960 | char *e; | |
961 | DIR *dir; | |
962 | struct dirent *de; | |
963 | int dfd, n; | |
964 | char buf[200]; | |
965 | int major, minor; | |
966 | struct stat st; | |
967 | ||
968 | if (fstat(fd, &st) != 0) | |
969 | return -1; | |
970 | sprintf(path, "/sys/dev/block/%d:%d/holders", | |
971 | (int)major(st.st_rdev), (int)minor(st.st_rdev)); | |
972 | e = path + strlen(path); | |
973 | ||
974 | dir = opendir(path); | |
975 | if (!dir) | |
976 | return -1; | |
977 | while ((de = readdir(dir))) { | |
978 | if (de->d_ino == 0) | |
979 | continue; | |
980 | if (de->d_name[0] == '.') | |
981 | continue; | |
982 | sprintf(e, "/%s/dev", de->d_name); | |
983 | dfd = open(path, O_RDONLY); | |
984 | if (dfd < 0) | |
985 | continue; | |
986 | n = read(dfd, buf, sizeof(buf)); | |
987 | close(dfd); | |
988 | if (n <= 0 || n >= sizeof(buf)) | |
989 | continue; | |
990 | buf[n] = 0; | |
991 | if (sscanf(buf, "%d:%d", &major, &minor) != 2) | |
992 | continue; | |
993 | sprintf(buf, "%d:%d", major, minor); | |
994 | dfd = dev_open(buf, O_RDONLY); | |
995 | if (dfd >= 0) { | |
996 | closedir(dir); | |
997 | return dfd; | |
998 | } | |
999 | } | |
355726fa | 1000 | closedir(dir); |
a322f70c DW |
1001 | return -1; |
1002 | } | |
1003 | ||
2f6079dc NB |
1004 | char *devnum2devname(int num) |
1005 | { | |
1006 | char name[100]; | |
1007 | if (num > 0) | |
1008 | sprintf(name, "md%d", num); | |
1009 | else | |
1010 | sprintf(name, "md_d%d", -1-num); | |
1011 | return strdup(name); | |
1012 | } | |
1013 | ||
77472ff8 NB |
1014 | int devname2devnum(char *name) |
1015 | { | |
1016 | char *ep; | |
1017 | int num; | |
1018 | if (strncmp(name, "md_d", 4)==0) | |
1019 | num = -1-strtoul(name+4, &ep, 10); | |
1020 | else | |
1021 | num = strtoul(name+2, &ep, 10); | |
1022 | return num; | |
1023 | } | |
1024 | ||
2f6079dc NB |
1025 | int fd2devnum(int fd) |
1026 | { | |
1027 | struct stat stb; | |
1028 | if (fstat(fd, &stb) == 0 && | |
1029 | (S_IFMT&stb.st_mode)==S_IFBLK) { | |
1030 | if (major(stb.st_rdev) == MD_MAJOR) | |
1031 | return minor(stb.st_rdev); | |
1032 | else | |
1033 | return -1- (minor(stb.st_rdev)>>6); | |
1034 | } | |
1035 | return -1; | |
1036 | } | |
1037 | ||
a931db9e NB |
1038 | int mdmon_running(int devnum) |
1039 | { | |
1040 | char path[100]; | |
1041 | char pid[10]; | |
1042 | int fd; | |
1043 | int n; | |
1044 | sprintf(path, "/var/run/mdadm/%s.pid", devnum2devname(devnum)); | |
1045 | fd = open(path, O_RDONLY, 0); | |
1046 | ||
1047 | if (fd < 0) | |
1048 | return 0; | |
1049 | n = read(fd, pid, 9); | |
1050 | close(fd); | |
1051 | if (n <= 0) | |
1052 | return 0; | |
1053 | if (kill(atoi(pid), 0) == 0) | |
1054 | return 1; | |
1055 | return 0; | |
1056 | } | |
1057 | ||
1058 | int signal_mdmon(int devnum) | |
1059 | { | |
1060 | char path[100]; | |
1061 | char pid[10]; | |
1062 | int fd; | |
1063 | int n; | |
1064 | sprintf(path, "/var/run/mdadm/%s.pid", devnum2devname(devnum)); | |
1065 | fd = open(path, O_RDONLY, 0); | |
1066 | ||
1067 | if (fd < 0) | |
1068 | return 0; | |
1069 | n = read(fd, pid, 9); | |
1070 | close(fd); | |
1071 | if (n <= 0) | |
1072 | return 0; | |
1073 | if (kill(atoi(pid), SIGUSR1) == 0) | |
1074 | return 1; | |
1075 | return 0; | |
1076 | } | |
1077 | ||
8850ee3e N |
1078 | int start_mdmon(int devnum) |
1079 | { | |
1080 | int i; | |
44d2e365 | 1081 | int len; |
9fe32043 N |
1082 | pid_t pid; |
1083 | int status; | |
44d2e365 N |
1084 | char pathbuf[1024]; |
1085 | char *paths[4] = { | |
1086 | pathbuf, | |
1087 | "/sbin/mdmon", | |
1088 | "mdmon", | |
1089 | NULL | |
1090 | }; | |
8850ee3e N |
1091 | |
1092 | if (env_no_mdmon()) | |
1093 | return 0; | |
1094 | ||
44d2e365 N |
1095 | len = readlink("/proc/self/exe", pathbuf, sizeof(pathbuf)); |
1096 | if (len > 0) { | |
1097 | char *sl; | |
1098 | pathbuf[len] = 0; | |
1099 | sl = strrchr(pathbuf, '/'); | |
1100 | if (sl) | |
1101 | sl++; | |
1102 | else | |
1103 | sl = pathbuf; | |
1104 | strcpy(sl, "mdmon"); | |
1105 | } else | |
1106 | pathbuf[0] = '\0'; | |
1107 | ||
8850ee3e N |
1108 | switch(fork()) { |
1109 | case 0: | |
1110 | /* FIXME yuk. CLOSE_EXEC?? */ | |
1111 | for (i=3; i < 100; i++) | |
1112 | close(i); | |
44d2e365 N |
1113 | for (i=0; paths[i]; i++) |
1114 | if (paths[i][0]) | |
1115 | execl(paths[i], "mdmon", | |
1116 | map_dev(dev2major(devnum), | |
1117 | dev2minor(devnum), | |
1118 | 1), NULL); | |
8850ee3e N |
1119 | exit(1); |
1120 | case -1: fprintf(stderr, Name ": cannot run mdmon. " | |
1121 | "Array remains readonly\n"); | |
1122 | return -1; | |
9fe32043 N |
1123 | default: /* parent - good */ |
1124 | pid = wait(&status); | |
1125 | if (pid < 0 || status != 0) | |
1126 | return -1; | |
8850ee3e N |
1127 | } |
1128 | return 0; | |
1129 | } | |
1130 | ||
5dcfcb71 DW |
1131 | int env_no_mdmon(void) |
1132 | { | |
1133 | char *val = getenv("MDADM_NO_MDMON"); | |
1134 | ||
1135 | if (val && atoi(val) == 1) | |
1136 | return 1; | |
1137 | ||
1138 | return 0; | |
1139 | } | |
1140 | ||
a931db9e | 1141 | |
edd8d13c NB |
1142 | int flush_metadata_updates(struct supertype *st) |
1143 | { | |
1144 | int sfd; | |
1145 | if (!st->updates) { | |
1146 | st->update_tail = NULL; | |
1147 | return -1; | |
1148 | } | |
1149 | ||
1150 | sfd = connect_monitor(devnum2devname(st->container_dev)); | |
1151 | if (sfd < 0) | |
1152 | return -1; | |
1153 | ||
1154 | while (st->updates) { | |
1155 | struct metadata_update *mu = st->updates; | |
1156 | st->updates = mu->next; | |
1157 | ||
1158 | send_message(sfd, mu, 0); | |
1159 | wait_reply(sfd, 0); | |
1160 | free(mu->buf); | |
1161 | free(mu); | |
1162 | } | |
1163 | ack(sfd, 0); | |
1164 | wait_reply(sfd, 0); | |
1165 | close(sfd); | |
1166 | st->update_tail = NULL; | |
1167 | return 0; | |
1168 | } | |
1169 | ||
1170 | void append_metadata_update(struct supertype *st, void *buf, int len) | |
1171 | { | |
1172 | ||
1173 | struct metadata_update *mu = malloc(sizeof(*mu)); | |
1174 | ||
1175 | mu->buf = buf; | |
1176 | mu->len = len; | |
1177 | mu->space = NULL; | |
1178 | mu->next = NULL; | |
1179 | *st->update_tail = mu; | |
1180 | st->update_tail = &mu->next; | |
1181 | } | |
1182 | ||
a931db9e | 1183 | |
fe6729fa NB |
1184 | #ifdef __TINYC__ |
1185 | /* tinyc doesn't optimize this check in ioctl.h out ... */ | |
1186 | unsigned int __invalid_size_argument_for_IOC = 0; | |
1187 | #endif | |
1188 |