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2bd0ea18 NS |
1 | /* |
2 | * Copyright (c) 2000 Silicon Graphics, Inc. All Rights Reserved. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms of version 2 of the GNU General Public License as | |
6 | * published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it would be useful, but | |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. | |
11 | * | |
12 | * Further, this software is distributed without any warranty that it is | |
13 | * free of the rightful claim of any third person regarding infringement | |
14 | * or the like. Any license provided herein, whether implied or | |
15 | * otherwise, applies only to this software file. Patent licenses, if | |
16 | * any, provided herein do not apply to combinations of this program with | |
17 | * other software, or any other product whatsoever. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License along | |
20 | * with this program; if not, write the Free Software Foundation, Inc., 59 | |
21 | * Temple Place - Suite 330, Boston MA 02111-1307, USA. | |
22 | * | |
23 | * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy, | |
24 | * Mountain View, CA 94043, or: | |
25 | * | |
26 | * http://www.sgi.com | |
27 | * | |
28 | * For further information regarding this notice, see: | |
29 | * | |
30 | * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/ | |
31 | */ | |
32 | ||
33 | #define ustat __kernel_ustat | |
34 | #include <libxfs.h> | |
35 | #include <fcntl.h> | |
36 | #include <errno.h> | |
37 | #include <mntent.h> | |
38 | #include <sys/stat.h> | |
39 | #undef ustat | |
40 | #include <sys/ustat.h> | |
41 | #include <sys/ioctl.h> | |
42 | #include <sys/mount.h> | |
43 | ||
44 | #ifndef BLKSETSIZE /* Baaad m'kay, but it's not in libc yet */ | |
45 | #define BLKSETSIZE _IO(0x12,108) /* set device block size */ | |
46 | #endif | |
47 | ||
48 | #define findrawpath(x) x | |
49 | #define findblockpath(x) x | |
50 | ||
51 | char *progname = "libxfs"; /* default, changed by each tool */ | |
52 | ||
53 | /* | |
54 | * dev_map - map open devices to fd. | |
55 | */ | |
56 | #define MAX_DEVS 10 /* arbitary maximum */ | |
57 | int nextfakedev = -1; /* device number to give to next fake device */ | |
58 | static struct dev_to_fd { | |
59 | dev_t dev; | |
60 | int fd; | |
61 | } dev_map[MAX_DEVS]={{0}}; | |
62 | ||
63 | static int | |
64 | check_ismounted(char *name, char *block, int verbose) | |
65 | { | |
66 | struct ustat ust; | |
67 | struct stat64 st; | |
68 | ||
69 | if (stat64(block, &st) < 0) | |
70 | return 0; | |
71 | if ((st.st_mode & S_IFMT) != S_IFBLK) | |
72 | return 0; | |
73 | if (ustat(st.st_rdev, &ust) >= 0) { | |
74 | if (verbose) | |
75 | fprintf(stderr, | |
76 | "%s: %s contains a mounted filesystem\n", | |
77 | progname, name); | |
78 | return 1; | |
79 | } | |
80 | return 0; | |
81 | } | |
82 | ||
83 | /* | |
84 | * Checks whether a given device has a mounted, writable | |
85 | * filesystem, returns 1 if it does & fatal (just warns | |
86 | * if not fatal, but allows us to proceed). | |
87 | * | |
88 | * Useful to tools which will produce uncertain results | |
89 | * if the filesystem is active - repair, check, logprint. | |
90 | */ | |
91 | static int | |
92 | check_isactive(char *name, char *block, int fatal) | |
93 | { | |
94 | int sts = 0; | |
95 | FILE *f; | |
96 | struct mntent *mnt; | |
97 | ||
98 | if (check_ismounted(name, block, 0)) { | |
99 | if ((f = setmntent(MOUNTED, "r")) == NULL) { | |
100 | fprintf(stderr, | |
101 | "%s: %s contains a possibly writable, mounted " | |
102 | "filesystem\n", progname, name); | |
103 | return fatal; | |
104 | } | |
105 | while ((mnt = getmntent(f)) != NULL) { | |
106 | if (hasmntopt(mnt, MNTOPT_RO) != NULL) | |
107 | break; | |
108 | } | |
109 | if (mnt == NULL) { | |
110 | fprintf(stderr, | |
111 | "%s: %s contains a writable mounted " | |
112 | "filesystem\n", progname, name); | |
113 | sts = fatal; | |
114 | } | |
115 | endmntent(f); | |
116 | } | |
117 | return sts; | |
118 | } | |
119 | ||
120 | static __int64_t | |
121 | findsize(char *path) | |
122 | { | |
123 | int fd; | |
124 | int error; | |
125 | long size; | |
126 | struct stat64 st; | |
127 | ||
128 | /* Test to see if we are dealing with a regular file rather than a | |
129 | * block device, if we are just use the size returned by stat64 | |
130 | */ | |
131 | if (stat64(path, &st) < 0) { | |
132 | fprintf(stderr, "%s: " | |
133 | "cannot stat the device special file \"%s\": %s\n", | |
134 | progname, path, strerror(errno)); | |
135 | exit(1); | |
136 | } | |
137 | if ((st.st_mode & S_IFMT) == S_IFREG) { | |
138 | return (__int64_t)(st.st_size >> 9); | |
139 | } | |
140 | ||
141 | if ((fd = open(path, 0)) < 0) { | |
142 | fprintf(stderr, "%s: " | |
143 | "error opening the device special file \"%s\": %s\n", | |
144 | progname, path, strerror(errno)); | |
145 | exit(1); | |
146 | } | |
147 | error = ioctl(fd, BLKGETSIZE, &size); | |
148 | if (error < 0) { | |
149 | fprintf(stderr, "%s: can't determine device size\n", progname); | |
150 | exit(1); | |
151 | } | |
152 | ||
153 | close(fd); | |
154 | ||
155 | return (__int64_t)size; | |
156 | } | |
157 | ||
158 | ||
159 | /* libxfs_device_to_fd: | |
160 | * lookup a device number in the device map | |
161 | * return the associated fd | |
162 | */ | |
163 | int | |
164 | libxfs_device_to_fd(dev_t device) | |
165 | { | |
166 | int d; | |
167 | ||
168 | for (d=0;d<MAX_DEVS;d++) | |
169 | if (dev_map[d].dev == device) | |
170 | return dev_map[d].fd; | |
171 | ||
172 | fprintf(stderr, "%s: device_to_fd: device %Ld is not open\n", | |
173 | progname, device); | |
174 | exit(1); | |
175 | } | |
176 | ||
177 | /* libxfs_device_open: | |
178 | * open a device and return its device number | |
179 | */ | |
180 | dev_t | |
181 | libxfs_device_open(char *path, int creat, int readonly) | |
182 | { | |
183 | int fd; | |
184 | dev_t dev; | |
185 | int d; | |
186 | struct stat statb; | |
187 | int blocksize = 512; /* bytes */ | |
188 | ||
189 | if ((fd = open(path, | |
190 | (readonly ? O_RDONLY : O_RDWR) | | |
191 | (creat ? O_CREAT|O_TRUNC : 0), | |
192 | 0666)) < 0) { | |
193 | fprintf(stderr, "%s: cannot open %s: %s\n", | |
194 | progname, path, strerror(errno)); | |
195 | exit(1); | |
196 | } | |
197 | ||
198 | if (stat(path, &statb)<0) { | |
199 | fprintf(stderr, "%s: cannot stat %s: %s\n", | |
200 | progname, path, strerror(errno)); | |
201 | exit(1); | |
202 | } | |
203 | ||
204 | /* Set device blocksize to 512 bytes */ | |
205 | if ((statb.st_mode & S_IFMT) == S_IFBLK) { | |
206 | if (ioctl(fd, BLKSETSIZE, &blocksize) < 0) { | |
207 | fprintf(stderr, "%s: warning - cannot set blocksize on " | |
208 | "block device %s: %s\n", | |
209 | progname, path, strerror(errno)); | |
210 | } | |
211 | } | |
212 | ||
213 | /* get the device number from the stat buf - unless | |
214 | * we're not opening a real device, in which case | |
215 | * choose a new fake device number | |
216 | */ | |
217 | dev=(statb.st_rdev)?(statb.st_rdev):(nextfakedev--); | |
218 | ||
219 | for (d=0;d<MAX_DEVS;d++) | |
220 | if (dev_map[d].dev == dev) { | |
221 | fprintf(stderr, "%s: device %Ld is already open\n", | |
222 | progname, dev); | |
223 | exit(1); | |
224 | } | |
225 | ||
226 | for (d=0;d<MAX_DEVS;d++) | |
227 | if (!dev_map[d].dev) { | |
228 | dev_map[d].dev=dev; | |
229 | dev_map[d].fd=fd; | |
230 | ||
231 | return dev; | |
232 | } | |
233 | ||
234 | fprintf(stderr, "%s: device_open: too many open devices\n", progname); | |
235 | exit(1); | |
236 | } | |
237 | ||
238 | void | |
239 | libxfs_device_close(dev_t dev) | |
240 | { | |
241 | int d; | |
242 | ||
243 | for (d=0;d<MAX_DEVS;d++) | |
244 | if (dev_map[d].dev == dev) { | |
245 | int fd; | |
246 | ||
247 | fd=dev_map[d].dev; | |
248 | dev_map[d].dev=dev_map[d].fd=0; | |
249 | ||
250 | fsync(fd); | |
251 | ioctl(fd, BLKFLSBUF, 0); | |
252 | close(fd); | |
253 | ||
254 | return; | |
255 | } | |
256 | ||
257 | fprintf(stderr, "%s: device_close: device %Ld is not open\n", | |
258 | progname, dev); | |
259 | ASSERT(0); | |
260 | exit(1); | |
261 | } | |
262 | ||
263 | ||
264 | /* | |
265 | * libxfs initialization. | |
266 | * Caller gets a 0 on failure (and we print a message), 1 on success. | |
267 | */ | |
268 | int | |
269 | libxfs_init(libxfs_init_t *a) | |
270 | { | |
271 | char *blockfile; | |
272 | char curdir[MAXPATHLEN]; | |
273 | char *dname; | |
274 | char dpath[25]; | |
275 | int fd; | |
276 | char *logname; | |
277 | char logpath[25]; | |
278 | int needcd; | |
279 | char *rawfile; | |
280 | char *rtname; | |
281 | char rtpath[25]; | |
282 | int rval = 0; | |
283 | int readonly; | |
284 | int inactive; | |
285 | struct stat64 stbuf; | |
286 | ||
287 | dpath[0] = logpath[0] = rtpath[0] = '\0'; | |
288 | dname = a->dname; | |
289 | logname = a->logname; | |
290 | rtname = a->rtname; | |
291 | a->ddev = a->logdev = a->rtdev = 0; | |
292 | a->dfd = a->logfd = a->rtfd = -1; | |
293 | a->dsize = a->logBBsize = a->logBBstart = a->rtsize = 0; | |
294 | ||
295 | (void)getcwd(curdir,MAXPATHLEN); | |
296 | needcd = 0; | |
297 | fd = -1; | |
298 | readonly = (a->isreadonly & LIBXFS_ISREADONLY); | |
299 | inactive = (a->isreadonly & LIBXFS_ISINACTIVE); | |
300 | if (a->volname) { | |
301 | if (stat64(a->volname, &stbuf) < 0) { | |
302 | perror(a->volname); | |
303 | goto done; | |
304 | } | |
305 | if (!(rawfile = findrawpath(a->volname))) { | |
306 | fprintf(stderr, "%s: " | |
307 | "can't find a character device matching %s\n", | |
308 | progname, a->volname); | |
309 | goto done; | |
310 | } | |
311 | if (!(blockfile = findblockpath(a->volname))) { | |
312 | fprintf(stderr, "%s: " | |
313 | "can't find a block device matching %s\n", | |
314 | progname, a->volname); | |
315 | goto done; | |
316 | } | |
317 | if (!readonly && !inactive && check_ismounted( | |
318 | a->volname, blockfile, 1)) | |
319 | goto done; | |
320 | if (inactive && check_isactive( | |
321 | a->volname, blockfile, readonly)) | |
322 | goto done; | |
323 | needcd = 1; | |
324 | fd = open(rawfile, O_RDONLY); | |
325 | #ifdef HAVE_VOLUME_MANAGER | |
326 | xlv_getdev_t getdev; | |
327 | if (ioctl(fd, DIOCGETVOLDEV, &getdev) < 0) | |
328 | #else | |
329 | if (1) | |
330 | #endif | |
331 | { | |
332 | if (a->notvolok) { | |
333 | dname = a->dname = a->volname; | |
334 | a->volname = NULL; | |
335 | goto voldone; | |
336 | } | |
337 | fprintf(stderr, "%s: " | |
338 | "%s is not a volume device name\n", | |
339 | progname, a->volname); | |
340 | if (a->notvolmsg) | |
341 | fprintf(stderr, a->notvolmsg, a->volname); | |
342 | goto done; | |
343 | } | |
344 | #ifdef HAVE_VOLUME_MANAGER | |
345 | if (getdev.data_subvol_dev && dname) { | |
346 | fprintf(stderr, "%s: " | |
347 | "%s has a data subvolume, cannot specify %s\n", | |
348 | progname, a->volname, dname); | |
349 | goto done; | |
350 | } | |
351 | if (getdev.log_subvol_dev && logname) { | |
352 | fprintf(stderr, "%s: " | |
353 | "%s has a log subvolume, cannot specify %s\n", | |
354 | progname, a->volname, logname); | |
355 | goto done; | |
356 | } | |
357 | if (getdev.rt_subvol_dev && rtname) { | |
358 | fprintf(stderr, "%s: %s has a realtime subvolume, " | |
359 | "cannot specify %s\n", | |
360 | progname, a->volname, rtname); | |
361 | goto done; | |
362 | } | |
363 | if (!dname && getdev.data_subvol_dev) { | |
364 | strcpy(dpath, "/tmp/libxfsdXXXXXX"); | |
365 | (void)mktemp(dpath); | |
366 | if (mknod(dpath, S_IFCHR | 0600, | |
367 | getdev.data_subvol_dev) < 0) { | |
368 | fprintf(stderr, "%s: mknod failed: %s\n", | |
369 | progname, strerror(errno)); | |
370 | goto done; | |
371 | } | |
372 | dname = dpath; | |
373 | } | |
374 | if (!logname && getdev.log_subvol_dev) { | |
375 | strcpy(logpath, "/tmp/libxfslXXXXXX"); | |
376 | (void)mktemp(logpath); | |
377 | if (mknod(logpath, S_IFCHR | 0600, | |
378 | getdev.log_subvol_dev) < 0) { | |
379 | fprintf(stderr, "%s: mknod failed: %s\n", | |
380 | progname, strerror(errno)); | |
381 | goto done; | |
382 | } | |
383 | logname = logpath; | |
384 | } | |
385 | if (!rtname && getdev.rt_subvol_dev) { | |
386 | strcpy(rtpath, "/tmp/libxfsrXXXXXX"); | |
387 | (void)mktemp(rtpath); | |
388 | if (mknod(rtpath, S_IFCHR | 0600, | |
389 | getdev.rt_subvol_dev) < 0) { | |
390 | fprintf(stderr, "%s: mknod failed: %s\n", | |
391 | progname, strerror(errno)); | |
392 | goto done; | |
393 | } | |
394 | rtname = rtpath; | |
395 | } | |
396 | #endif | |
397 | } | |
398 | voldone: | |
399 | if (dname) { | |
400 | if (dname[0] != '/' && needcd) | |
401 | chdir(curdir); | |
402 | if (a->disfile) { | |
403 | a->ddev= libxfs_device_open(dname, a->dcreat, readonly); | |
404 | a->dfd = libxfs_device_to_fd(a->ddev); | |
405 | } else { | |
406 | if (stat64(dname, &stbuf) < 0) { | |
407 | fprintf(stderr, "%s: stat64 failed on %s: %s\n", | |
408 | progname, dname, strerror(errno)); | |
409 | goto done; | |
410 | } | |
411 | if (!(rawfile = findrawpath(dname))) { | |
412 | fprintf(stderr, "%s: can't find a char device " | |
413 | "matching %s\n", progname, dname); | |
414 | goto done; | |
415 | } | |
416 | if (!(blockfile = findblockpath(dname))) { | |
417 | fprintf(stderr, "%s: can't find a block device " | |
418 | "matching %s\n", progname, dname); | |
419 | goto done; | |
420 | } | |
421 | if (!readonly && !inactive && check_ismounted( | |
422 | dname, blockfile, 1)) | |
423 | goto done; | |
424 | if (inactive && check_isactive( | |
425 | dname, blockfile, readonly)) | |
426 | goto done; | |
427 | a->ddev = libxfs_device_open(rawfile, | |
428 | a->dcreat, readonly); | |
429 | a->dfd = libxfs_device_to_fd(a->ddev); | |
430 | a->dsize = findsize(rawfile); | |
431 | } | |
432 | needcd = 1; | |
433 | } else | |
434 | a->dsize = 0; | |
435 | if (logname) { | |
436 | if (logname[0] != '/' && needcd) | |
437 | chdir(curdir); | |
438 | if (a->lisfile) { | |
439 | a->logdev = libxfs_device_open(logname, | |
440 | a->lcreat, readonly); | |
441 | a->logfd = libxfs_device_to_fd(a->logdev); | |
442 | } else { | |
443 | if (stat64(logname, &stbuf) < 0) { | |
444 | fprintf(stderr, "%s: stat64 failed on %s: %s\n", | |
445 | progname, logname, strerror(errno)); | |
446 | goto done; | |
447 | } | |
448 | if (!(rawfile = findrawpath(logname))) { | |
449 | fprintf(stderr, "%s: can't find a char device " | |
450 | "matching %s\n", progname, logname); | |
451 | goto done; | |
452 | } | |
453 | if (!(blockfile = findblockpath(logname))) { | |
454 | fprintf(stderr, "%s: can't find a block device " | |
455 | "matching %s\n", progname, logname); | |
456 | goto done; | |
457 | } | |
458 | if (!readonly && !inactive && check_ismounted( | |
459 | logname, blockfile, 1)) | |
460 | goto done; | |
461 | else if (inactive && check_isactive( | |
462 | logname, blockfile, readonly)) | |
463 | goto done; | |
464 | a->logdev = libxfs_device_open(rawfile, | |
465 | a->lcreat, readonly); | |
466 | a->logfd = libxfs_device_to_fd(a->logdev); | |
467 | a->logBBsize = findsize(rawfile); | |
468 | } | |
469 | needcd = 1; | |
470 | } else | |
471 | a->logBBsize = 0; | |
472 | if (rtname) { | |
473 | if (rtname[0] != '/' && needcd) | |
474 | chdir(curdir); | |
475 | if (a->risfile) { | |
476 | a->rtdev = libxfs_device_open(rtname, | |
477 | a->rcreat, readonly); | |
478 | a->rtfd = libxfs_device_to_fd(a->rtdev); | |
479 | } else { | |
480 | if (stat64(rtname, &stbuf) < 0) { | |
481 | fprintf(stderr, "%s: stat64 failed on %s: %s\n", | |
482 | progname, rtname, strerror(errno)); | |
483 | goto done; | |
484 | } | |
485 | if (!(rawfile = findrawpath(rtname))) { | |
486 | fprintf(stderr, "%s: can't find a char device " | |
487 | "matching %s\n", progname, rtname); | |
488 | goto done; | |
489 | } | |
490 | if (!(blockfile = findblockpath(rtname))) { | |
491 | fprintf(stderr, "%s: can't find a block device " | |
492 | "matching %s\n", progname, rtname); | |
493 | goto done; | |
494 | } | |
495 | if (!readonly && !inactive && check_ismounted( | |
496 | rtname, blockfile, 1)) | |
497 | goto done; | |
498 | if (inactive && check_isactive( | |
499 | rtname, blockfile, readonly)) | |
500 | goto done; | |
501 | a->rtdev = libxfs_device_open(rawfile, | |
502 | a->rcreat, readonly); | |
503 | a->rtfd = libxfs_device_to_fd(a->rtdev); | |
504 | a->rtsize = findsize(rawfile); | |
505 | } | |
506 | needcd = 1; | |
507 | } else | |
508 | a->rtsize = 0; | |
509 | if (a->dsize < 0) { | |
510 | fprintf(stderr, "%s: can't get size for data subvolume\n", | |
511 | progname); | |
512 | goto done; | |
513 | } | |
514 | if (a->logBBsize < 0) { | |
515 | fprintf(stderr, "%s: can't get size for log subvolume\n", | |
516 | progname); | |
517 | goto done; | |
518 | } | |
519 | if (a->rtsize < 0) { | |
520 | fprintf(stderr, "%s: can't get size for realtime subvolume\n", | |
521 | progname); | |
522 | goto done; | |
523 | } | |
524 | if (needcd) | |
525 | chdir(curdir); | |
526 | rval = 1; | |
527 | done: | |
528 | if (dpath[0]) | |
529 | unlink(dpath); | |
530 | if (logpath[0]) | |
531 | unlink(logpath); | |
532 | if (rtpath[0]) | |
533 | unlink(rtpath); | |
534 | if (fd >= 0) | |
535 | close(fd); | |
536 | if (!rval && a->ddev) | |
537 | libxfs_device_close(a->ddev); | |
538 | if (!rval && a->logdev) | |
539 | libxfs_device_close(a->logdev); | |
540 | if (!rval && a->rtdev) | |
541 | libxfs_device_close(a->rtdev); | |
542 | return rval; | |
543 | } | |
544 | ||
545 | ||
546 | /* | |
547 | * Initialize/destroy all of the zone allocators we use. | |
548 | */ | |
549 | static void | |
550 | manage_zones(int release) | |
551 | { | |
552 | extern xfs_zone_t *xfs_ili_zone; | |
553 | extern xfs_zone_t *xfs_inode_zone; | |
554 | extern xfs_zone_t *xfs_ifork_zone; | |
555 | extern xfs_zone_t *xfs_dabuf_zone; | |
556 | extern xfs_zone_t *xfs_buf_item_zone; | |
557 | extern xfs_zone_t *xfs_da_state_zone; | |
558 | extern xfs_zone_t *xfs_btree_cur_zone; | |
559 | extern xfs_zone_t *xfs_bmap_free_item_zone; | |
560 | extern void xfs_dir_startup(); | |
561 | ||
562 | if (release) { /* free zone allocation */ | |
563 | libxfs_free(xfs_inode_zone); | |
564 | libxfs_free(xfs_ifork_zone); | |
565 | libxfs_free(xfs_dabuf_zone); | |
566 | libxfs_free(xfs_buf_item_zone); | |
567 | libxfs_free(xfs_da_state_zone); | |
568 | libxfs_free(xfs_btree_cur_zone); | |
569 | libxfs_free(xfs_bmap_free_item_zone); | |
570 | return; | |
571 | } | |
572 | /* otherwise initialise zone allocation */ | |
573 | xfs_inode_zone = libxfs_zone_init(sizeof(xfs_inode_t), "xfs_inode"); | |
574 | xfs_ifork_zone = libxfs_zone_init(sizeof(xfs_ifork_t), "xfs_ifork"); | |
575 | xfs_dabuf_zone = libxfs_zone_init(sizeof(xfs_dabuf_t), "xfs_dabuf"); | |
576 | xfs_ili_zone = libxfs_zone_init( | |
577 | sizeof(xfs_inode_log_item_t), "xfs_inode_log_item"); | |
578 | xfs_buf_item_zone = libxfs_zone_init( | |
579 | sizeof(xfs_buf_log_item_t), "xfs_buf_log_item"); | |
580 | xfs_da_state_zone = libxfs_zone_init( | |
581 | sizeof(xfs_da_state_t), "xfs_da_state"); | |
582 | xfs_btree_cur_zone = libxfs_zone_init( | |
583 | sizeof(xfs_btree_cur_t), "xfs_btree_cur"); | |
584 | xfs_bmap_free_item_zone = libxfs_zone_init( | |
585 | sizeof(xfs_bmap_free_item_t), "xfs_bmap_free_item"); | |
586 | xfs_dir_startup(); | |
587 | } | |
588 | ||
589 | /* | |
590 | * Get the bitmap and summary inodes into the mount structure | |
591 | * at mount time. | |
592 | */ | |
593 | static int | |
594 | rtmount_inodes(xfs_mount_t *mp) | |
595 | { | |
596 | int error; | |
597 | xfs_sb_t *sbp; | |
598 | ||
599 | sbp = &mp->m_sb; | |
600 | if (sbp->sb_rbmino == NULLFSINO) | |
601 | return 0; | |
602 | error = libxfs_iread(mp, NULL, sbp->sb_rbmino, &mp->m_rbmip, 0); | |
603 | if (error) { | |
604 | fprintf(stderr, "%s: cannot read realtime bitmap inode (%d)\n", | |
605 | progname, error); | |
606 | return error; | |
607 | } | |
608 | ASSERT(mp->m_rbmip != NULL); | |
609 | ASSERT(sbp->sb_rsumino != NULLFSINO); | |
610 | error = libxfs_iread(mp, NULL, sbp->sb_rsumino, &mp->m_rsumip, 0); | |
611 | if (error) { | |
612 | fprintf(stderr, "%s: cannot read realtime summary inode (%d)\n", | |
613 | progname, error); | |
614 | return error; | |
615 | } | |
616 | ASSERT(mp->m_rsumip != NULL); | |
617 | return 0; | |
618 | } | |
619 | ||
620 | /* | |
621 | * Mount structure initialization, provides a filled-in xfs_mount_t | |
622 | * such that the numerous XFS_* macros can be used. If dev is zero, | |
623 | * no IO will be performed (no size checks, read root inodes). | |
624 | */ | |
625 | xfs_mount_t * | |
626 | libxfs_mount( | |
627 | xfs_mount_t *mp, | |
628 | xfs_sb_t *sb, | |
629 | dev_t dev, | |
630 | dev_t logdev, | |
631 | dev_t rtdev, | |
632 | int rrootinos) | |
633 | { | |
634 | xfs_daddr_t d; | |
635 | xfs_buf_t *bp; | |
636 | xfs_sb_t *sbp; | |
637 | size_t size; | |
638 | int error; | |
639 | ||
640 | mp->m_dev = dev; | |
641 | mp->m_rtdev = rtdev; | |
642 | mp->m_logdev = logdev; | |
643 | mp->m_sb = *sb; | |
644 | sbp = &(mp->m_sb); | |
645 | manage_zones(0); | |
646 | ||
647 | libxfs_mount_common(mp, sb); | |
648 | ||
649 | libxfs_alloc_compute_maxlevels(mp); | |
650 | libxfs_bmap_compute_maxlevels(mp, XFS_DATA_FORK); | |
651 | libxfs_bmap_compute_maxlevels(mp, XFS_ATTR_FORK); | |
652 | libxfs_ialloc_compute_maxlevels(mp); | |
653 | ||
654 | if (sbp->sb_imax_pct) { | |
655 | /* Make sure the maximum inode count is a multiple of the | |
656 | * units we allocate inodes in. | |
657 | */ | |
658 | mp->m_maxicount = (sbp->sb_dblocks * sbp->sb_imax_pct) / 100; | |
659 | mp->m_maxicount = ((mp->m_maxicount / mp->m_ialloc_blks) * | |
660 | mp->m_ialloc_blks) << sbp->sb_inopblog; | |
661 | } else | |
662 | mp->m_maxicount = 0; | |
663 | ||
664 | mp->m_inode_cluster_size = XFS_INODE_BIG_CLUSTER_SIZE; | |
665 | ||
666 | /* | |
667 | * Set whether we're using inode alignment. | |
668 | */ | |
669 | if (XFS_SB_VERSION_HASALIGN(&mp->m_sb) && | |
670 | mp->m_sb.sb_inoalignmt >= | |
671 | XFS_B_TO_FSBT(mp, mp->m_inode_cluster_size)) | |
672 | mp->m_inoalign_mask = mp->m_sb.sb_inoalignmt - 1; | |
673 | else | |
674 | mp->m_inoalign_mask = 0; | |
675 | /* | |
676 | * If we are using stripe alignment, check whether | |
677 | * the stripe unit is a multiple of the inode alignment | |
678 | */ | |
679 | if ( mp->m_dalign | |
680 | && mp->m_inoalign_mask && !(mp->m_dalign & mp->m_inoalign_mask)) | |
681 | mp->m_sinoalign = mp->m_dalign; | |
682 | else | |
683 | mp->m_sinoalign = 0; | |
684 | ||
685 | /* | |
686 | * Check that the data (and log if separate) are an ok size. | |
687 | */ | |
688 | d = (xfs_daddr_t)XFS_FSB_TO_BB(mp, mp->m_sb.sb_dblocks); | |
689 | if (XFS_BB_TO_FSB(mp, d) != mp->m_sb.sb_dblocks) { | |
690 | fprintf(stderr, "%s: size check failed\n", progname); | |
691 | return NULL; | |
692 | } | |
693 | ||
694 | /* Initialize the appropriate directory manager */ | |
695 | if (XFS_SB_VERSION_HASDIRV2(sbp)) | |
696 | libxfs_dir2_mount(mp); | |
697 | else | |
698 | libxfs_dir_mount(mp); | |
699 | ||
700 | /* Initialize the precomputed transaction reservations values */ | |
701 | libxfs_trans_init(mp); | |
702 | ||
703 | if (dev == 0) /* maxtrres, we have no device so leave now */ | |
704 | return mp; | |
705 | ||
706 | bp = libxfs_readbuf(mp->m_dev, d - 1, 1, 0); | |
707 | if (bp == NULL) { | |
708 | fprintf(stderr, "%s: data size check failed\n", progname); | |
709 | return NULL; | |
710 | } | |
711 | libxfs_putbuf(bp); | |
712 | ||
713 | if (mp->m_logdev && mp->m_logdev != mp->m_dev) { | |
714 | d = (xfs_daddr_t)XFS_FSB_TO_BB(mp, mp->m_sb.sb_logblocks); | |
715 | if ( (XFS_BB_TO_FSB(mp, d) != mp->m_sb.sb_logblocks) || | |
716 | (!(bp = libxfs_readbuf(mp->m_logdev, d - 1, 1, 1)))) { | |
717 | fprintf(stderr, "%s: log size checks failed\n", | |
718 | progname); | |
719 | return NULL; | |
720 | } | |
721 | libxfs_putbuf(bp); | |
722 | } | |
723 | ||
724 | /* Initialize realtime fields in the mount structure */ | |
725 | if (libxfs_rtmount_init(mp)) { | |
726 | fprintf(stderr, "%s: real-time device init failed\n", progname); | |
727 | return NULL; | |
728 | } | |
729 | ||
730 | /* Allocate and initialize the per-ag data */ | |
731 | size = sbp->sb_agcount * sizeof(xfs_perag_t); | |
732 | if ((mp->m_perag = calloc(size, 1)) == NULL) { | |
733 | fprintf(stderr, "%s: failed to alloc %d bytes: %s\n", | |
734 | progname, size, strerror(errno)); | |
735 | exit(1); | |
736 | } | |
737 | ||
738 | /* | |
739 | * mkfs calls mount before the root inode is allocated. | |
740 | */ | |
741 | if (rrootinos && sbp->sb_rootino != NULLFSINO) { | |
742 | error = libxfs_iread(mp, NULL, sbp->sb_rootino, | |
743 | &mp->m_rootip, 0); | |
744 | if (error) { | |
745 | fprintf(stderr, "%s: cannot read root inode (%d)\n", | |
746 | progname, error); | |
747 | return NULL; | |
748 | } | |
749 | ASSERT(mp->m_rootip != NULL); | |
750 | } | |
751 | if (rrootinos && rtmount_inodes(mp)) | |
752 | return NULL; | |
753 | return mp; | |
754 | } | |
755 | ||
756 | /* | |
757 | * Release any resourse obtained during a mount. | |
758 | */ | |
759 | void | |
760 | libxfs_umount(xfs_mount_t *mp) | |
761 | { | |
762 | manage_zones(1); | |
763 | free(mp->m_perag); | |
764 | } |