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1 | /* | |
2 | * mdadm - manage Linux "md" devices aka RAID arrays. | |
3 | * | |
4 | * Copyright (C) 2001-2006 Neil Brown <neilb@suse.de> | |
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 | ||
30 | #include "mdadm.h" | |
31 | #include "md_p.h" | |
32 | #include <sys/socket.h> | |
33 | #include <sys/utsname.h> | |
34 | #include <sys/wait.h> | |
35 | #include <sys/un.h> | |
36 | #include <ctype.h> | |
37 | #include <dirent.h> | |
38 | #include <signal.h> | |
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 | }; | |
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 | { | |
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++; | |
103 | } | |
104 | if (hit == 32) | |
105 | return 1; | |
106 | return 0; | |
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) | |
131 | return (vers.major*10000) + (vers.minor*100) + vers.patchlevel; | |
132 | if (errno == EACCES) | |
133 | return -1; | |
134 | if (major(stb.st_rdev) == MD_MAJOR) | |
135 | return (3600); | |
136 | return -1; | |
137 | } | |
138 | ||
139 | int get_linux_version() | |
140 | { | |
141 | struct utsname name; | |
142 | char *cp; | |
143 | int a,b,c; | |
144 | if (uname(&name) <0) | |
145 | return -1; | |
146 | ||
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 | ||
154 | return (a*1000000)+(b*1000)+c; | |
155 | } | |
156 | ||
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 | ||
176 | int enough(int level, int raid_disks, int layout, int clean, | |
177 | char *avail, int avail_disks) | |
178 | { | |
179 | int copies, first; | |
180 | switch (level) { | |
181 | case 10: | |
182 | /* This is the tricky one - we need to check | |
183 | * which actual disks are present. | |
184 | */ | |
185 | copies = (layout&255)* ((layout>>8) & 255); | |
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; | |
201 | ||
202 | case -4: | |
203 | return avail_disks>= 1; | |
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: | |
211 | if (clean) | |
212 | return avail_disks >= raid_disks-1; | |
213 | else | |
214 | return avail_disks >= raid_disks; | |
215 | case 6: | |
216 | if (clean) | |
217 | return avail_disks >= raid_disks-2; | |
218 | else | |
219 | return avail_disks >= raid_disks; | |
220 | default: | |
221 | return 0; | |
222 | } | |
223 | } | |
224 | ||
225 | int same_uuid(int a[4], int b[4], int swapuuid) | |
226 | { | |
227 | if (swapuuid) { | |
228 | /* parse uuids are hostendian. | |
229 | * uuid's from some superblocks are big-ending | |
230 | * if there is a difference, we need to swap.. | |
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 | } | |
251 | } | |
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 | } | |
271 | ||
272 | char *fname_from_uuid(struct supertype *st, struct mdinfo *info, char *buf, char sep) | |
273 | { | |
274 | int i, j; | |
275 | int id; | |
276 | char uuid[16]; | |
277 | char *c = buf; | |
278 | strcpy(c, "UUID-"); | |
279 | c += strlen(c); | |
280 | copy_uuid(uuid, info->uuid, st->ss->swapuuid); | |
281 | for (i = 0; i < 4; i++) { | |
282 | id = uuid[i]; | |
283 | if (i) | |
284 | *c++ = sep; | |
285 | for (j = 3; j >= 0; j--) { | |
286 | sprintf(c,"%02x", (unsigned char) uuid[j+4*i]); | |
287 | c+= 2; | |
288 | } | |
289 | } | |
290 | return buf; | |
291 | } | |
292 | ||
293 | #ifndef MDASSEMBLE | |
294 | int check_ext2(int fd, char *name) | |
295 | { | |
296 | /* | |
297 | * Check for an ext2fs file system. | |
298 | * Superblock is always 1K at 1K offset | |
299 | * | |
300 | * s_magic is le16 at 56 == 0xEF53 | |
301 | * report mtime - le32 at 44 | |
302 | * blocks - le32 at 4 | |
303 | * logblksize - le32 at 24 | |
304 | */ | |
305 | unsigned char sb[1024]; | |
306 | time_t mtime; | |
307 | int size, bsize; | |
308 | if (lseek(fd, 1024,0)!= 1024) | |
309 | return 0; | |
310 | if (read(fd, sb, 1024)!= 1024) | |
311 | return 0; | |
312 | if (sb[56] != 0x53 || sb[57] != 0xef) | |
313 | return 0; | |
314 | ||
315 | mtime = sb[44]|(sb[45]|(sb[46]|sb[47]<<8)<<8)<<8; | |
316 | bsize = sb[24]|(sb[25]|(sb[26]|sb[27]<<8)<<8)<<8; | |
317 | size = sb[4]|(sb[5]|(sb[6]|sb[7]<<8)<<8)<<8; | |
318 | fprintf(stderr, Name ": %s appears to contain an ext2fs file system\n", | |
319 | name); | |
320 | fprintf(stderr," size=%dK mtime=%s", | |
321 | size*(1<<bsize), ctime(&mtime)); | |
322 | return 1; | |
323 | } | |
324 | ||
325 | int check_reiser(int fd, char *name) | |
326 | { | |
327 | /* | |
328 | * superblock is at 64K | |
329 | * size is 1024; | |
330 | * Magic string "ReIsErFs" or "ReIsEr2Fs" at 52 | |
331 | * | |
332 | */ | |
333 | unsigned char sb[1024]; | |
334 | unsigned long size; | |
335 | if (lseek(fd, 64*1024, 0) != 64*1024) | |
336 | return 0; | |
337 | if (read(fd, sb, 1024) != 1024) | |
338 | return 0; | |
339 | if (strncmp((char*)sb+52, "ReIsErFs",8)!=0 && | |
340 | strncmp((char*)sb+52, "ReIsEr2Fs",9)!=0) | |
341 | return 0; | |
342 | fprintf(stderr, Name ": %s appears to contain a reiserfs file system\n",name); | |
343 | size = sb[0]|(sb[1]|(sb[2]|sb[3]<<8)<<8)<<8; | |
344 | fprintf(stderr, " size = %luK\n", size*4); | |
345 | ||
346 | return 1; | |
347 | } | |
348 | ||
349 | int check_raid(int fd, char *name) | |
350 | { | |
351 | struct mdinfo info; | |
352 | time_t crtime; | |
353 | char *level; | |
354 | struct supertype *st = guess_super(fd); | |
355 | ||
356 | if (!st) return 0; | |
357 | st->ss->load_super(st, fd, name); | |
358 | /* Looks like a raid array .. */ | |
359 | fprintf(stderr, Name ": %s appears to be part of a raid array:\n", | |
360 | name); | |
361 | st->ss->getinfo_super(st, &info); | |
362 | st->ss->free_super(st); | |
363 | crtime = info.array.ctime; | |
364 | level = map_num(pers, info.array.level); | |
365 | if (!level) level = "-unknown-"; | |
366 | fprintf(stderr, " level=%s devices=%d ctime=%s", | |
367 | level, info.array.raid_disks, ctime(&crtime)); | |
368 | return 1; | |
369 | } | |
370 | ||
371 | int ask(char *mesg) | |
372 | { | |
373 | char *add = ""; | |
374 | int i; | |
375 | for (i=0; i<5; i++) { | |
376 | char buf[100]; | |
377 | fprintf(stderr, "%s%s", mesg, add); | |
378 | fflush(stderr); | |
379 | if (fgets(buf, 100, stdin)==NULL) | |
380 | return 0; | |
381 | if (buf[0]=='y' || buf[0]=='Y') | |
382 | return 1; | |
383 | if (buf[0]=='n' || buf[0]=='N') | |
384 | return 0; | |
385 | add = "(y/n) "; | |
386 | } | |
387 | fprintf(stderr, Name ": assuming 'no'\n"); | |
388 | return 0; | |
389 | } | |
390 | #endif /* MDASSEMBLE */ | |
391 | ||
392 | char *map_num(mapping_t *map, int num) | |
393 | { | |
394 | while (map->name) { | |
395 | if (map->num == num) | |
396 | return map->name; | |
397 | map++; | |
398 | } | |
399 | return NULL; | |
400 | } | |
401 | ||
402 | int map_name(mapping_t *map, char *name) | |
403 | { | |
404 | while (map->name) { | |
405 | if (strcmp(map->name, name)==0) | |
406 | return map->num; | |
407 | map++; | |
408 | } | |
409 | return UnSet; | |
410 | } | |
411 | ||
412 | ||
413 | int is_standard(char *dev, int *nump) | |
414 | { | |
415 | /* tests if dev is a "standard" md dev name. | |
416 | * i.e if the last component is "/dNN" or "/mdNN", | |
417 | * where NN is a string of digits | |
418 | * Returns 1 if a partitionable standard, | |
419 | * -1 if non-partitonable, | |
420 | * 0 if not a standard name. | |
421 | */ | |
422 | char *d = strrchr(dev, '/'); | |
423 | int type=0; | |
424 | int num; | |
425 | if (!d) | |
426 | return 0; | |
427 | if (strncmp(d, "/d",2)==0) | |
428 | d += 2, type=1; /* /dev/md/dN{pM} */ | |
429 | else if (strncmp(d, "/md_d", 5)==0) | |
430 | d += 5, type=1; /* /dev/md_dNpM */ | |
431 | else if (strncmp(d, "/md", 3)==0) | |
432 | d += 3, type=-1; /* /dev/mdN */ | |
433 | else if (d-dev > 3 && strncmp(d-2, "md/", 3)==0) | |
434 | d += 1, type=-1; /* /dev/md/N */ | |
435 | else | |
436 | return 0; | |
437 | if (!*d) | |
438 | return 0; | |
439 | num = atoi(d); | |
440 | while (isdigit(*d)) | |
441 | d++; | |
442 | if (*d) | |
443 | return 0; | |
444 | if (nump) *nump = num; | |
445 | ||
446 | return type; | |
447 | } | |
448 | ||
449 | ||
450 | /* | |
451 | * convert a major/minor pair for a block device into a name in /dev, if possible. | |
452 | * On the first call, walk /dev collecting name. | |
453 | * Put them in a simple linked listfor now. | |
454 | */ | |
455 | struct devmap { | |
456 | int major, minor; | |
457 | char *name; | |
458 | struct devmap *next; | |
459 | } *devlist = NULL; | |
460 | int devlist_ready = 0; | |
461 | ||
462 | int add_dev(const char *name, const struct stat *stb, int flag, struct FTW *s) | |
463 | { | |
464 | struct stat st; | |
465 | if (S_ISLNK(stb->st_mode)) { | |
466 | stat(name, &st); | |
467 | stb = &st; | |
468 | } | |
469 | ||
470 | if ((stb->st_mode&S_IFMT)== S_IFBLK) { | |
471 | char *n = strdup(name); | |
472 | struct devmap *dm = malloc(sizeof(*dm)); | |
473 | if (strncmp(n, "/dev/./", 7)==0) | |
474 | strcpy(n+4, name+6); | |
475 | if (dm) { | |
476 | dm->major = major(stb->st_rdev); | |
477 | dm->minor = minor(stb->st_rdev); | |
478 | dm->name = n; | |
479 | dm->next = devlist; | |
480 | devlist = dm; | |
481 | } | |
482 | } | |
483 | return 0; | |
484 | } | |
485 | ||
486 | #ifndef HAVE_NFTW | |
487 | #ifdef HAVE_FTW | |
488 | int add_dev_1(const char *name, const struct stat *stb, int flag) | |
489 | { | |
490 | return add_dev(name, stb, flag, NULL); | |
491 | } | |
492 | int nftw(const char *path, int (*han)(const char *name, const struct stat *stb, int flag, struct FTW *s), int nopenfd, int flags) | |
493 | { | |
494 | return ftw(path, add_dev_1, nopenfd); | |
495 | } | |
496 | #else | |
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 0; | |
500 | } | |
501 | #endif /* HAVE_FTW */ | |
502 | #endif /* HAVE_NFTW */ | |
503 | ||
504 | /* | |
505 | * Find a block device with the right major/minor number. | |
506 | * If we find multiple names, choose the shortest. | |
507 | * If we find a non-standard name, it is probably there | |
508 | * deliberately so prefer it over a standard name. | |
509 | * This applies only to names for MD devices. | |
510 | */ | |
511 | char *map_dev(int major, int minor, int create) | |
512 | { | |
513 | struct devmap *p; | |
514 | char *std = NULL, *nonstd=NULL; | |
515 | int did_check = 0; | |
516 | ||
517 | if (major == 0 && minor == 0) | |
518 | return NULL; | |
519 | ||
520 | retry: | |
521 | if (!devlist_ready) { | |
522 | char *dev = "/dev"; | |
523 | struct stat stb; | |
524 | while(devlist) { | |
525 | struct devmap *d = devlist; | |
526 | devlist = d->next; | |
527 | free(d->name); | |
528 | free(d); | |
529 | } | |
530 | if (lstat(dev, &stb)==0 && | |
531 | S_ISLNK(stb.st_mode)) | |
532 | dev = "/dev/."; | |
533 | nftw(dev, add_dev, 10, FTW_PHYS); | |
534 | devlist_ready=1; | |
535 | did_check = 1; | |
536 | } | |
537 | ||
538 | for (p=devlist; p; p=p->next) | |
539 | if (p->major == major && | |
540 | p->minor == minor) { | |
541 | if (is_standard(p->name, NULL)) { | |
542 | if (std == NULL || | |
543 | strlen(p->name) < strlen(std)) | |
544 | std = p->name; | |
545 | } else { | |
546 | if (nonstd == NULL || | |
547 | strlen(p->name) < strlen(nonstd)) | |
548 | nonstd = p->name; | |
549 | } | |
550 | } | |
551 | if (!std && !nonstd && !did_check) { | |
552 | devlist_ready = 0; | |
553 | goto retry; | |
554 | } | |
555 | if (create && !std && !nonstd) { | |
556 | static char buf[30]; | |
557 | snprintf(buf, sizeof(buf), "%d:%d", major, minor); | |
558 | nonstd = buf; | |
559 | } | |
560 | ||
561 | return nonstd ? nonstd : std; | |
562 | } | |
563 | ||
564 | unsigned long calc_csum(void *super, int bytes) | |
565 | { | |
566 | unsigned long long newcsum = 0; | |
567 | int i; | |
568 | unsigned int csum; | |
569 | unsigned int *superc = (unsigned int*) super; | |
570 | ||
571 | for(i=0; i<bytes/4; i++) | |
572 | newcsum+= superc[i]; | |
573 | csum = (newcsum& 0xffffffff) + (newcsum>>32); | |
574 | #ifdef __alpha__ | |
575 | /* The in-kernel checksum calculation is always 16bit on | |
576 | * the alpha, though it is 32 bit on i386... | |
577 | * I wonder what it is elsewhere... (it uses and API in | |
578 | * a way that it shouldn't). | |
579 | */ | |
580 | csum = (csum & 0xffff) + (csum >> 16); | |
581 | csum = (csum & 0xffff) + (csum >> 16); | |
582 | #endif | |
583 | return csum; | |
584 | } | |
585 | ||
586 | #ifndef MDASSEMBLE | |
587 | char *human_size(long long bytes) | |
588 | { | |
589 | static char buf[30]; | |
590 | ||
591 | /* We convert bytes to either centi-M{ega,ibi}bytes or | |
592 | * centi-G{igi,ibi}bytes, with appropriate rounding, | |
593 | * and then print 1/100th of those as a decimal. | |
594 | * We allow upto 2048Megabytes before converting to | |
595 | * gigabytes, as that shows more precision and isn't | |
596 | * too large a number. | |
597 | * Terrabytes are not yet handled. | |
598 | */ | |
599 | ||
600 | if (bytes < 5000*1024) | |
601 | buf[0]=0; | |
602 | else if (bytes < 2*1024LL*1024LL*1024LL) { | |
603 | long cMiB = (bytes / ( (1LL<<20) / 200LL ) +1) /2; | |
604 | long cMB = (bytes / ( 1000000LL / 200LL ) +1) /2; | |
605 | snprintf(buf, sizeof(buf), " (%ld.%02ld MiB %ld.%02ld MB)", | |
606 | cMiB/100 , cMiB % 100, | |
607 | cMB/100, cMB % 100); | |
608 | } else { | |
609 | long cGiB = (bytes / ( (1LL<<30) / 200LL ) +1) /2; | |
610 | long cGB = (bytes / (1000000000LL/200LL ) +1) /2; | |
611 | snprintf(buf, sizeof(buf), " (%ld.%02ld GiB %ld.%02ld GB)", | |
612 | cGiB/100 , cGiB % 100, | |
613 | cGB/100, cGB % 100); | |
614 | } | |
615 | return buf; | |
616 | } | |
617 | ||
618 | char *human_size_brief(long long bytes) | |
619 | { | |
620 | static char buf[30]; | |
621 | ||
622 | if (bytes < 5000*1024) | |
623 | snprintf(buf, sizeof(buf), "%ld.%02ldKiB", | |
624 | (long)(bytes>>10), (long)(((bytes&1023)*100+512)/1024) | |
625 | ); | |
626 | else if (bytes < 2*1024LL*1024LL*1024LL) | |
627 | snprintf(buf, sizeof(buf), "%ld.%02ldMiB", | |
628 | (long)(bytes>>20), | |
629 | (long)((bytes&0xfffff)+0x100000/200)/(0x100000/100) | |
630 | ); | |
631 | else | |
632 | snprintf(buf, sizeof(buf), "%ld.%02ldGiB", | |
633 | (long)(bytes>>30), | |
634 | (long)(((bytes>>10)&0xfffff)+0x100000/200)/(0x100000/100) | |
635 | ); | |
636 | return buf; | |
637 | } | |
638 | #endif | |
639 | ||
640 | unsigned long long calc_array_size(int level, int raid_disks, int layout, | |
641 | int chunksize, unsigned long long devsize) | |
642 | { | |
643 | int data_disks = 0; | |
644 | switch (level) { | |
645 | case 0: data_disks = raid_disks; break; | |
646 | case 1: data_disks = 1; break; | |
647 | case 4: | |
648 | case 5: data_disks = raid_disks - 1; break; | |
649 | case 6: data_disks = raid_disks - 2; break; | |
650 | case 10: data_disks = raid_disks / (layout & 255) / ((layout>>8)&255); | |
651 | break; | |
652 | } | |
653 | devsize &= ~(unsigned long long)((chunksize>>9)-1); | |
654 | return data_disks * devsize; | |
655 | } | |
656 | ||
657 | int get_mdp_major(void) | |
658 | { | |
659 | static int mdp_major = -1; | |
660 | FILE *fl; | |
661 | char *w; | |
662 | int have_block = 0; | |
663 | int have_devices = 0; | |
664 | int last_num = -1; | |
665 | ||
666 | if (mdp_major != -1) | |
667 | return mdp_major; | |
668 | fl = fopen("/proc/devices", "r"); | |
669 | if (!fl) | |
670 | return -1; | |
671 | while ((w = conf_word(fl, 1))) { | |
672 | if (have_block && strcmp(w, "devices:")==0) | |
673 | have_devices = 1; | |
674 | have_block = (strcmp(w, "Block")==0); | |
675 | if (isdigit(w[0])) | |
676 | last_num = atoi(w); | |
677 | if (have_devices && strcmp(w, "mdp")==0) | |
678 | mdp_major = last_num; | |
679 | free(w); | |
680 | } | |
681 | fclose(fl); | |
682 | return mdp_major; | |
683 | } | |
684 | ||
685 | #if !defined(MDASSEMBLE) || defined(MDASSEMBLE) && defined(MDASSEMBLE_AUTO) | |
686 | char *get_md_name(int dev) | |
687 | { | |
688 | /* find /dev/md%d or /dev/md/%d or make a device /dev/.tmp.md%d */ | |
689 | /* if dev < 0, want /dev/md/d%d or find mdp in /proc/devices ... */ | |
690 | static char devname[50]; | |
691 | struct stat stb; | |
692 | dev_t rdev; | |
693 | char *dn; | |
694 | ||
695 | if (dev < 0) { | |
696 | int mdp = get_mdp_major(); | |
697 | if (mdp < 0) return NULL; | |
698 | rdev = makedev(mdp, (-1-dev)<<6); | |
699 | snprintf(devname, sizeof(devname), "/dev/md/d%d", -1-dev); | |
700 | if (stat(devname, &stb) == 0 | |
701 | && (S_IFMT&stb.st_mode) == S_IFBLK | |
702 | && (stb.st_rdev == rdev)) | |
703 | return devname; | |
704 | } else { | |
705 | rdev = makedev(MD_MAJOR, dev); | |
706 | snprintf(devname, sizeof(devname), "/dev/md%d", dev); | |
707 | if (stat(devname, &stb) == 0 | |
708 | && (S_IFMT&stb.st_mode) == S_IFBLK | |
709 | && (stb.st_rdev == rdev)) | |
710 | return devname; | |
711 | ||
712 | snprintf(devname, sizeof(devname), "/dev/md/%d", dev); | |
713 | if (stat(devname, &stb) == 0 | |
714 | && (S_IFMT&stb.st_mode) == S_IFBLK | |
715 | && (stb.st_rdev == rdev)) | |
716 | return devname; | |
717 | } | |
718 | dn = map_dev(major(rdev), minor(rdev), 0); | |
719 | if (dn) | |
720 | return dn; | |
721 | snprintf(devname, sizeof(devname), "/dev/.tmp.md%d", dev); | |
722 | if (mknod(devname, S_IFBLK | 0600, rdev) == -1) | |
723 | if (errno != EEXIST) | |
724 | return NULL; | |
725 | ||
726 | if (stat(devname, &stb) == 0 | |
727 | && (S_IFMT&stb.st_mode) == S_IFBLK | |
728 | && (stb.st_rdev == rdev)) | |
729 | return devname; | |
730 | unlink(devname); | |
731 | return NULL; | |
732 | } | |
733 | ||
734 | void put_md_name(char *name) | |
735 | { | |
736 | if (strncmp(name, "/dev/.tmp.md", 12)==0) | |
737 | unlink(name); | |
738 | } | |
739 | ||
740 | int find_free_devnum(int use_partitions) | |
741 | { | |
742 | int devnum; | |
743 | for (devnum = 127; devnum != 128; | |
744 | devnum = devnum ? devnum-1 : (1<<22)-1) { | |
745 | char *dn; | |
746 | int _devnum; | |
747 | ||
748 | _devnum = use_partitions ? (-1-devnum) : devnum; | |
749 | if (mddev_busy(_devnum)) | |
750 | continue; | |
751 | /* make sure it is new to /dev too, at least as a | |
752 | * non-standard */ | |
753 | dn = map_dev(dev2major(_devnum), dev2minor(_devnum), 0); | |
754 | if (dn && ! is_standard(dn, NULL)) | |
755 | continue; | |
756 | break; | |
757 | } | |
758 | if (devnum == 128) | |
759 | return NoMdDev; | |
760 | return use_partitions ? (-1-devnum) : devnum; | |
761 | } | |
762 | #endif /* !defined(MDASSEMBLE) || defined(MDASSEMBLE) && defined(MDASSEMBLE_AUTO) */ | |
763 | ||
764 | int dev_open(char *dev, int flags) | |
765 | { | |
766 | /* like 'open', but if 'dev' matches %d:%d, create a temp | |
767 | * block device and open that | |
768 | */ | |
769 | char *e; | |
770 | int fd = -1; | |
771 | char devname[32]; | |
772 | int major; | |
773 | int minor; | |
774 | ||
775 | if (!dev) return -1; | |
776 | ||
777 | major = strtoul(dev, &e, 0); | |
778 | if (e > dev && *e == ':' && e[1] && | |
779 | (minor = strtoul(e+1, &e, 0)) >= 0 && | |
780 | *e == 0) { | |
781 | snprintf(devname, sizeof(devname), "/dev/.tmp.md.%d:%d:%d", | |
782 | (int)getpid(), major, minor); | |
783 | if (mknod(devname, S_IFBLK|0600, makedev(major, minor))==0) { | |
784 | fd = open(devname, flags|O_DIRECT); | |
785 | unlink(devname); | |
786 | } | |
787 | } else | |
788 | fd = open(dev, flags|O_DIRECT); | |
789 | return fd; | |
790 | } | |
791 | ||
792 | int open_dev_excl(int devnum) | |
793 | { | |
794 | char buf[20]; | |
795 | int i; | |
796 | ||
797 | sprintf(buf, "%d:%d", dev2major(devnum), dev2minor(devnum)); | |
798 | for (i=0 ; i<25 ; i++) { | |
799 | int fd = dev_open(buf, O_RDWR|O_EXCL); | |
800 | if (fd >= 0) | |
801 | return fd; | |
802 | if (errno != EBUSY) | |
803 | return fd; | |
804 | usleep(200000); | |
805 | } | |
806 | return -1; | |
807 | } | |
808 | ||
809 | struct superswitch *superlist[] = { &super0, &super1, &super_ddf, &super_imsm, NULL }; | |
810 | ||
811 | #if !defined(MDASSEMBLE) || defined(MDASSEMBLE) && defined(MDASSEMBLE_AUTO) | |
812 | ||
813 | struct supertype *super_by_fd(int fd) | |
814 | { | |
815 | mdu_array_info_t array; | |
816 | int vers; | |
817 | int minor; | |
818 | struct supertype *st = NULL; | |
819 | struct mdinfo *sra; | |
820 | char *verstr; | |
821 | char version[20]; | |
822 | int i; | |
823 | char *subarray = NULL; | |
824 | ||
825 | sra = sysfs_read(fd, 0, GET_VERSION); | |
826 | ||
827 | if (sra) { | |
828 | vers = sra->array.major_version; | |
829 | minor = sra->array.minor_version; | |
830 | verstr = sra->text_version; | |
831 | } else { | |
832 | if (ioctl(fd, GET_ARRAY_INFO, &array)) | |
833 | array.major_version = array.minor_version = 0; | |
834 | vers = array.major_version; | |
835 | minor = array.minor_version; | |
836 | verstr = ""; | |
837 | } | |
838 | ||
839 | if (vers != -1) { | |
840 | sprintf(version, "%d.%d", vers, minor); | |
841 | verstr = version; | |
842 | } | |
843 | if (minor == -2 && is_subarray(verstr)) { | |
844 | char *dev = verstr+1; | |
845 | subarray = strchr(dev, '/'); | |
846 | int devnum; | |
847 | if (subarray) | |
848 | *subarray++ = '\0'; | |
849 | devnum = devname2devnum(dev); | |
850 | subarray = strdup(subarray); | |
851 | if (sra) | |
852 | sysfs_free(sra); | |
853 | sra = sysfs_read(-1, devnum, GET_VERSION); | |
854 | verstr = sra->text_version ? : "-no-metadata-"; | |
855 | } | |
856 | ||
857 | for (i = 0; st == NULL && superlist[i] ; i++) | |
858 | st = superlist[i]->match_metadata_desc(verstr); | |
859 | ||
860 | if (sra) | |
861 | sysfs_free(sra); | |
862 | if (st) { | |
863 | st->sb = NULL; | |
864 | if (subarray) { | |
865 | strncpy(st->subarray, subarray, 32); | |
866 | st->subarray[31] = 0; | |
867 | free(subarray); | |
868 | } else | |
869 | st->subarray[0] = 0; | |
870 | } | |
871 | return st; | |
872 | } | |
873 | #endif /* !defined(MDASSEMBLE) || defined(MDASSEMBLE) && defined(MDASSEMBLE_AUTO) */ | |
874 | ||
875 | ||
876 | struct supertype *dup_super(struct supertype *orig) | |
877 | { | |
878 | struct supertype *st; | |
879 | ||
880 | if (!orig) | |
881 | return orig; | |
882 | st = malloc(sizeof(*st)); | |
883 | if (!st) | |
884 | return st; | |
885 | memset(st, 0, sizeof(*st)); | |
886 | st->ss = orig->ss; | |
887 | st->max_devs = orig->max_devs; | |
888 | st->minor_version = orig->minor_version; | |
889 | strcpy(st->subarray, orig->subarray); | |
890 | st->sb = NULL; | |
891 | st->info = NULL; | |
892 | return st; | |
893 | } | |
894 | ||
895 | struct supertype *guess_super(int fd) | |
896 | { | |
897 | /* try each load_super to find the best match, | |
898 | * and return the best superswitch | |
899 | */ | |
900 | struct superswitch *ss; | |
901 | struct supertype *st; | |
902 | unsigned long besttime = 0; | |
903 | int bestsuper = -1; | |
904 | int i; | |
905 | ||
906 | st = malloc(sizeof(*st)); | |
907 | for (i=0 ; superlist[i]; i++) { | |
908 | int rv; | |
909 | ss = superlist[i]; | |
910 | memset(st, 0, sizeof(*st)); | |
911 | rv = ss->load_super(st, fd, NULL); | |
912 | if (rv == 0) { | |
913 | struct mdinfo info; | |
914 | st->ss->getinfo_super(st, &info); | |
915 | if (bestsuper == -1 || | |
916 | besttime < info.array.ctime) { | |
917 | bestsuper = i; | |
918 | besttime = info.array.ctime; | |
919 | } | |
920 | ss->free_super(st); | |
921 | } | |
922 | } | |
923 | if (bestsuper != -1) { | |
924 | int rv; | |
925 | memset(st, 0, sizeof(*st)); | |
926 | rv = superlist[bestsuper]->load_super(st, fd, NULL); | |
927 | if (rv == 0) { | |
928 | superlist[bestsuper]->free_super(st); | |
929 | return st; | |
930 | } | |
931 | } | |
932 | free(st); | |
933 | return NULL; | |
934 | } | |
935 | ||
936 | /* Return size of device in bytes */ | |
937 | int get_dev_size(int fd, char *dname, unsigned long long *sizep) | |
938 | { | |
939 | unsigned long long ldsize; | |
940 | struct stat st; | |
941 | ||
942 | if (fstat(fd, &st) != -1 && S_ISREG(st.st_mode)) | |
943 | ldsize = (unsigned long long)st.st_size; | |
944 | else | |
945 | #ifdef BLKGETSIZE64 | |
946 | if (ioctl(fd, BLKGETSIZE64, &ldsize) != 0) | |
947 | #endif | |
948 | { | |
949 | unsigned long dsize; | |
950 | if (ioctl(fd, BLKGETSIZE, &dsize) == 0) { | |
951 | ldsize = dsize; | |
952 | ldsize <<= 9; | |
953 | } else { | |
954 | if (dname) | |
955 | fprintf(stderr, Name ": Cannot get size of %s: %s\b", | |
956 | dname, strerror(errno)); | |
957 | return 0; | |
958 | } | |
959 | } | |
960 | *sizep = ldsize; | |
961 | return 1; | |
962 | } | |
963 | ||
964 | void get_one_disk(int mdfd, mdu_array_info_t *ainf, mdu_disk_info_t *disk) | |
965 | { | |
966 | int d; | |
967 | ioctl(mdfd, GET_ARRAY_INFO, ainf); | |
968 | for (d = 0 ; d < ainf->raid_disks + ainf->nr_disks ; d++) | |
969 | if (ioctl(mdfd, GET_DISK_INFO, disk) == 0) | |
970 | return; | |
971 | } | |
972 | ||
973 | int open_container(int fd) | |
974 | { | |
975 | /* 'fd' is a block device. Find out if it is in use | |
976 | * by a container, and return an open fd on that container. | |
977 | */ | |
978 | char path[256]; | |
979 | char *e; | |
980 | DIR *dir; | |
981 | struct dirent *de; | |
982 | int dfd, n; | |
983 | char buf[200]; | |
984 | int major, minor; | |
985 | struct stat st; | |
986 | ||
987 | if (fstat(fd, &st) != 0) | |
988 | return -1; | |
989 | sprintf(path, "/sys/dev/block/%d:%d/holders", | |
990 | (int)major(st.st_rdev), (int)minor(st.st_rdev)); | |
991 | e = path + strlen(path); | |
992 | ||
993 | dir = opendir(path); | |
994 | if (!dir) | |
995 | return -1; | |
996 | while ((de = readdir(dir))) { | |
997 | if (de->d_ino == 0) | |
998 | continue; | |
999 | if (de->d_name[0] == '.') | |
1000 | continue; | |
1001 | sprintf(e, "/%s/dev", de->d_name); | |
1002 | dfd = open(path, O_RDONLY); | |
1003 | if (dfd < 0) | |
1004 | continue; | |
1005 | n = read(dfd, buf, sizeof(buf)); | |
1006 | close(dfd); | |
1007 | if (n <= 0 || n >= sizeof(buf)) | |
1008 | continue; | |
1009 | buf[n] = 0; | |
1010 | if (sscanf(buf, "%d:%d", &major, &minor) != 2) | |
1011 | continue; | |
1012 | sprintf(buf, "%d:%d", major, minor); | |
1013 | dfd = dev_open(buf, O_RDONLY); | |
1014 | if (dfd >= 0) { | |
1015 | closedir(dir); | |
1016 | return dfd; | |
1017 | } | |
1018 | } | |
1019 | closedir(dir); | |
1020 | return -1; | |
1021 | } | |
1022 | ||
1023 | int add_disk(int mdfd, struct supertype *st, | |
1024 | struct mdinfo *sra, struct mdinfo *info) | |
1025 | { | |
1026 | /* Add a device to an array, in one of 2 ways. */ | |
1027 | int rv; | |
1028 | #ifndef MDASSEMBLE | |
1029 | if (st->ss->external) { | |
1030 | rv = sysfs_add_disk(sra, info); | |
1031 | if (! rv) { | |
1032 | struct mdinfo *sd2; | |
1033 | for (sd2 = sra->devs; sd2; sd2=sd2->next) | |
1034 | if (sd2 == info) | |
1035 | break; | |
1036 | if (sd2 == NULL) { | |
1037 | sd2 = malloc(sizeof(*sd2)); | |
1038 | *sd2 = *info; | |
1039 | sd2->next = sra->devs; | |
1040 | sra->devs = sd2; | |
1041 | } | |
1042 | } | |
1043 | } else | |
1044 | #endif | |
1045 | rv = ioctl(mdfd, ADD_NEW_DISK, &info->disk); | |
1046 | return rv; | |
1047 | } | |
1048 | ||
1049 | int set_array_info(int mdfd, struct supertype *st, struct mdinfo *info) | |
1050 | { | |
1051 | /* Initialise kernel's knowledge of array. | |
1052 | * This varies between externally managed arrays | |
1053 | * and older kernels | |
1054 | */ | |
1055 | int vers = md_get_version(mdfd); | |
1056 | int rv; | |
1057 | ||
1058 | #ifndef MDASSEMBLE | |
1059 | if (st->ss->external) | |
1060 | rv = sysfs_set_array(info, vers); | |
1061 | else | |
1062 | #endif | |
1063 | if ((vers % 100) >= 1) { /* can use different versions */ | |
1064 | mdu_array_info_t inf; | |
1065 | memset(&inf, 0, sizeof(inf)); | |
1066 | inf.major_version = info->array.major_version; | |
1067 | inf.minor_version = info->array.minor_version; | |
1068 | rv = ioctl(mdfd, SET_ARRAY_INFO, &inf); | |
1069 | } else | |
1070 | rv = ioctl(mdfd, SET_ARRAY_INFO, NULL); | |
1071 | return rv; | |
1072 | } | |
1073 | ||
1074 | char *devnum2devname(int num) | |
1075 | { | |
1076 | char name[100]; | |
1077 | if (num > 0) | |
1078 | sprintf(name, "md%d", num); | |
1079 | else | |
1080 | sprintf(name, "md_d%d", -1-num); | |
1081 | return strdup(name); | |
1082 | } | |
1083 | ||
1084 | int devname2devnum(char *name) | |
1085 | { | |
1086 | char *ep; | |
1087 | int num; | |
1088 | if (strncmp(name, "md_d", 4)==0) | |
1089 | num = -1-strtoul(name+4, &ep, 10); | |
1090 | else | |
1091 | num = strtoul(name+2, &ep, 10); | |
1092 | return num; | |
1093 | } | |
1094 | ||
1095 | int stat2devnum(struct stat *st) | |
1096 | { | |
1097 | if ((S_IFMT & st->st_mode) == S_IFBLK) { | |
1098 | if (major(st->st_rdev) == MD_MAJOR) | |
1099 | return minor(st->st_rdev); | |
1100 | else | |
1101 | return -1- (minor(st->st_rdev)>>6); | |
1102 | } | |
1103 | return -1; | |
1104 | ||
1105 | } | |
1106 | ||
1107 | int fd2devnum(int fd) | |
1108 | { | |
1109 | struct stat stb; | |
1110 | if (fstat(fd, &stb) == 0) | |
1111 | return stat2devnum(&stb); | |
1112 | return -1; | |
1113 | } | |
1114 | ||
1115 | int mdmon_running(int devnum) | |
1116 | { | |
1117 | char path[100]; | |
1118 | char pid[10]; | |
1119 | int fd; | |
1120 | int n; | |
1121 | sprintf(path, "/var/run/mdadm/%s.pid", devnum2devname(devnum)); | |
1122 | fd = open(path, O_RDONLY, 0); | |
1123 | ||
1124 | if (fd < 0) | |
1125 | return 0; | |
1126 | n = read(fd, pid, 9); | |
1127 | close(fd); | |
1128 | if (n <= 0) | |
1129 | return 0; | |
1130 | if (kill(atoi(pid), 0) == 0) | |
1131 | return 1; | |
1132 | return 0; | |
1133 | } | |
1134 | ||
1135 | int signal_mdmon(int devnum) | |
1136 | { | |
1137 | char path[100]; | |
1138 | char pid[10]; | |
1139 | int fd; | |
1140 | int n; | |
1141 | sprintf(path, "/var/run/mdadm/%s.pid", devnum2devname(devnum)); | |
1142 | fd = open(path, O_RDONLY, 0); | |
1143 | ||
1144 | if (fd < 0) | |
1145 | return 0; | |
1146 | n = read(fd, pid, 9); | |
1147 | close(fd); | |
1148 | if (n <= 0) | |
1149 | return 0; | |
1150 | if (kill(atoi(pid), SIGUSR1) == 0) | |
1151 | return 1; | |
1152 | return 0; | |
1153 | } | |
1154 | ||
1155 | int start_mdmon(int devnum) | |
1156 | { | |
1157 | int i; | |
1158 | int len; | |
1159 | pid_t pid; | |
1160 | int status; | |
1161 | char pathbuf[1024]; | |
1162 | char *paths[4] = { | |
1163 | pathbuf, | |
1164 | "/sbin/mdmon", | |
1165 | "mdmon", | |
1166 | NULL | |
1167 | }; | |
1168 | ||
1169 | if (env_no_mdmon()) | |
1170 | return 0; | |
1171 | ||
1172 | len = readlink("/proc/self/exe", pathbuf, sizeof(pathbuf)); | |
1173 | if (len > 0) { | |
1174 | char *sl; | |
1175 | pathbuf[len] = 0; | |
1176 | sl = strrchr(pathbuf, '/'); | |
1177 | if (sl) | |
1178 | sl++; | |
1179 | else | |
1180 | sl = pathbuf; | |
1181 | strcpy(sl, "mdmon"); | |
1182 | } else | |
1183 | pathbuf[0] = '\0'; | |
1184 | ||
1185 | switch(fork()) { | |
1186 | case 0: | |
1187 | /* FIXME yuk. CLOSE_EXEC?? */ | |
1188 | for (i=3; i < 100; i++) | |
1189 | close(i); | |
1190 | for (i=0; paths[i]; i++) | |
1191 | if (paths[i][0]) | |
1192 | execl(paths[i], "mdmon", | |
1193 | map_dev(dev2major(devnum), | |
1194 | dev2minor(devnum), | |
1195 | 1), NULL); | |
1196 | exit(1); | |
1197 | case -1: fprintf(stderr, Name ": cannot run mdmon. " | |
1198 | "Array remains readonly\n"); | |
1199 | return -1; | |
1200 | default: /* parent - good */ | |
1201 | pid = wait(&status); | |
1202 | if (pid < 0 || status != 0) | |
1203 | return -1; | |
1204 | } | |
1205 | return 0; | |
1206 | } | |
1207 | ||
1208 | int env_no_mdmon(void) | |
1209 | { | |
1210 | char *val = getenv("MDADM_NO_MDMON"); | |
1211 | ||
1212 | if (val && atoi(val) == 1) | |
1213 | return 1; | |
1214 | ||
1215 | return 0; | |
1216 | } | |
1217 | ||
1218 | #ifndef MDASSEMBLE | |
1219 | int flush_metadata_updates(struct supertype *st) | |
1220 | { | |
1221 | int sfd; | |
1222 | if (!st->updates) { | |
1223 | st->update_tail = NULL; | |
1224 | return -1; | |
1225 | } | |
1226 | ||
1227 | sfd = connect_monitor(devnum2devname(st->container_dev)); | |
1228 | if (sfd < 0) | |
1229 | return -1; | |
1230 | ||
1231 | while (st->updates) { | |
1232 | struct metadata_update *mu = st->updates; | |
1233 | st->updates = mu->next; | |
1234 | ||
1235 | send_message(sfd, mu, 0); | |
1236 | wait_reply(sfd, 0); | |
1237 | free(mu->buf); | |
1238 | free(mu); | |
1239 | } | |
1240 | ack(sfd, 0); | |
1241 | wait_reply(sfd, 0); | |
1242 | close(sfd); | |
1243 | st->update_tail = NULL; | |
1244 | return 0; | |
1245 | } | |
1246 | ||
1247 | void append_metadata_update(struct supertype *st, void *buf, int len) | |
1248 | { | |
1249 | ||
1250 | struct metadata_update *mu = malloc(sizeof(*mu)); | |
1251 | ||
1252 | mu->buf = buf; | |
1253 | mu->len = len; | |
1254 | mu->space = NULL; | |
1255 | mu->next = NULL; | |
1256 | *st->update_tail = mu; | |
1257 | st->update_tail = &mu->next; | |
1258 | } | |
1259 | #endif /* MDASSEMBLE */ | |
1260 | ||
1261 | #ifdef __TINYC__ | |
1262 | /* tinyc doesn't optimize this check in ioctl.h out ... */ | |
1263 | unsigned int __invalid_size_argument_for_IOC = 0; | |
1264 | #endif | |
1265 |