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2bd0ea18 | 1 | /* |
0d3e0b37 | 2 | * Copyright (c) 2000-2002 Silicon Graphics, Inc. All Rights Reserved. |
2bd0ea18 NS |
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 | #include <libxfs.h> | |
34 | #include <malloc.h> | |
2bd0ea18 NS |
35 | #include <xfs_log.h> |
36 | #include <xfs_log_priv.h> | |
37 | ||
38 | #define BBTOOFF64(bbs) (((xfs_off_t)(bbs)) << BBSHIFT) | |
39 | #define BDSTRAT_SIZE (256 * 1024) | |
40 | ||
41 | void | |
42 | libxfs_device_zero(dev_t dev, xfs_daddr_t start, uint len) | |
43 | { | |
44 | xfs_daddr_t bno; | |
45 | uint nblks; | |
46 | int size; | |
47 | int fd; | |
48 | char *z; | |
49 | ||
50 | size = BDSTRAT_SIZE <= BBTOB(len) ? BDSTRAT_SIZE : BBTOB(len); | |
51 | if ((z = memalign(getpagesize(), size)) == NULL) { | |
52 | fprintf(stderr, "%s: device_zero can't memalign %d bytes: %s\n", | |
53 | progname, size, strerror(errno)); | |
54 | exit(1); | |
55 | } | |
56 | bzero(z, size); | |
57 | fd = libxfs_device_to_fd(dev); | |
58 | for (bno = start; bno < start + len; ) { | |
59 | nblks = (uint)BTOBB(size); | |
60 | if (bno + nblks > start + len) | |
61 | nblks = (uint)(start + len - bno); | |
62 | if (lseek64(fd, BBTOOFF64(bno), SEEK_SET) < 0) { | |
63 | fprintf(stderr, "%s: device_zero lseek64 failed: %s\n", | |
64 | progname, strerror(errno)); | |
65 | exit(1); | |
66 | } | |
67 | if (write(fd, z, BBTOB(nblks)) < BBTOB(nblks)) { | |
68 | fprintf(stderr, "%s: device_zero write failed: %s\n", | |
69 | progname, strerror(errno)); | |
70 | exit(1); | |
71 | } | |
72 | bno += nblks; | |
73 | } | |
74 | free(z); | |
75 | } | |
76 | ||
77 | int | |
78 | libxfs_log_clear( | |
79 | dev_t device, | |
80 | xfs_daddr_t start, | |
81 | uint length, | |
82 | uuid_t *fs_uuid, | |
83 | int fmt) | |
84 | { | |
85 | xfs_buf_t *buf; | |
86 | xlog_rec_header_t *head; | |
87 | xlog_op_header_t *op; | |
88 | /* the data section must be 32 bit size aligned */ | |
89 | struct { | |
90 | __uint16_t magic; | |
91 | __uint16_t pad1; | |
92 | __uint32_t pad2; /* may as well make it 64 bits */ | |
93 | } magic = { XLOG_UNMOUNT_TYPE, 0, 0 }; | |
94 | ||
95 | if (!device || !fs_uuid) | |
96 | return -EINVAL; | |
97 | ||
98 | /* first zero the log */ | |
99 | libxfs_device_zero(device, start, length); | |
100 | ||
101 | /* then write a log record header */ | |
102 | buf = libxfs_getbuf(device, start, 1); | |
103 | if (!buf) | |
104 | return -1; | |
105 | ||
106 | memset(XFS_BUF_PTR(buf), 0, BBSIZE); | |
107 | head = (xlog_rec_header_t *)XFS_BUF_PTR(buf); | |
108 | ||
109 | /* note that oh_tid actually contains the cycle number | |
110 | * and the tid is stored in h_cycle_data[0] - that's the | |
111 | * way things end up on disk. | |
112 | */ | |
113 | ||
114 | INT_SET(head->h_magicno, ARCH_CONVERT, XLOG_HEADER_MAGIC_NUM); | |
115 | INT_SET(head->h_cycle, ARCH_CONVERT, 1); | |
116 | INT_SET(head->h_version, ARCH_CONVERT, 1); | |
117 | INT_SET(head->h_len, ARCH_CONVERT, 20); | |
118 | INT_SET(head->h_chksum, ARCH_CONVERT, 0); | |
119 | INT_SET(head->h_prev_block, ARCH_CONVERT, -1); | |
120 | INT_SET(head->h_num_logops, ARCH_CONVERT, 1); | |
121 | INT_SET(head->h_cycle_data[0], ARCH_CONVERT, 0xb0c0d0d0); | |
122 | INT_SET(head->h_fmt, ARCH_CONVERT, fmt); | |
123 | ||
124 | ASSIGN_ANY_LSN(head->h_lsn, 1, 0, ARCH_CONVERT); | |
125 | ASSIGN_ANY_LSN(head->h_tail_lsn, 1, 0, ARCH_CONVERT); | |
126 | ||
127 | memcpy(head->h_fs_uuid, fs_uuid, sizeof(uuid_t)); | |
128 | ||
129 | if (libxfs_writebuf(buf, 0)) | |
130 | return -1; | |
131 | ||
132 | buf = libxfs_getbuf(device, start + 1, 1); | |
133 | if (!buf) | |
134 | return -1; | |
135 | ||
136 | /* now a log unmount op */ | |
137 | memset(XFS_BUF_PTR(buf), 0, BBSIZE); | |
138 | op = (xlog_op_header_t *)XFS_BUF_PTR(buf); | |
139 | INT_SET(op->oh_tid, ARCH_CONVERT, 1); | |
140 | INT_SET(op->oh_len, ARCH_CONVERT, sizeof(magic)); | |
141 | INT_SET(op->oh_clientid, ARCH_CONVERT, XFS_LOG); | |
142 | INT_SET(op->oh_flags, ARCH_CONVERT, XLOG_UNMOUNT_TRANS); | |
143 | INT_SET(op->oh_res2, ARCH_CONVERT, 0); | |
144 | ||
145 | /* and the data for this op */ | |
146 | ||
147 | memcpy(XFS_BUF_PTR(buf) + sizeof(xlog_op_header_t), | |
148 | &magic, | |
149 | sizeof(magic)); | |
150 | ||
151 | if (libxfs_writebuf(buf, 0)) | |
152 | return -1; | |
153 | ||
154 | return 0; | |
155 | } | |
156 | ||
157 | /* | |
158 | * Simple I/O interface | |
159 | */ | |
160 | ||
161 | xfs_buf_t * | |
162 | libxfs_getbuf(dev_t device, xfs_daddr_t blkno, int len) | |
163 | { | |
164 | xfs_buf_t *buf; | |
165 | size_t total; | |
166 | ||
167 | total = sizeof(xfs_buf_t) + BBTOB(len); | |
168 | if ((buf = calloc(total, 1)) == NULL) { | |
5b64e00a NS |
169 | fprintf(stderr, "%s: buf calloc failed (%ld bytes): %s\n", |
170 | progname, (long)total, strerror(errno)); | |
2bd0ea18 NS |
171 | exit(1); |
172 | } | |
173 | /* by default, we allocate buffer directly after the header */ | |
174 | buf->b_blkno = blkno; | |
175 | buf->b_bcount = BBTOB(len); | |
176 | buf->b_dev = device; | |
177 | buf->b_addr = (char *)(&buf->b_addr + 1); /* must be last field */ | |
178 | #ifdef IO_DEBUG | |
179 | fprintf(stderr, "getbuf allocated %ubytes, blkno=%llu(%llu), %p\n", | |
180 | BBTOB(len), BBTOOFF64(blkno), blkno, buf); | |
181 | #endif | |
182 | ||
183 | return(buf); | |
184 | } | |
185 | ||
186 | int | |
187 | libxfs_readbufr(dev_t dev, xfs_daddr_t blkno, xfs_buf_t *buf, int len, int die) | |
188 | { | |
189 | int fd = libxfs_device_to_fd(dev); | |
190 | ||
191 | buf->b_dev = dev; | |
192 | buf->b_blkno = blkno; | |
193 | ASSERT(BBTOB(len) <= buf->b_bcount); | |
194 | ||
195 | if (lseek64(fd, BBTOOFF64(blkno), SEEK_SET) < 0) { | |
5b64e00a NS |
196 | fprintf(stderr, "%s: lseek64 to %llu failed: %s\n", progname, |
197 | (unsigned long long)BBTOOFF64(blkno), strerror(errno)); | |
2bd0ea18 NS |
198 | ASSERT(0); |
199 | if (die) | |
200 | exit(1); | |
201 | return errno; | |
202 | } | |
203 | if (read(fd, buf->b_addr, BBTOB(len)) < 0) { | |
204 | fprintf(stderr, "%s: read failed: %s\n", | |
205 | progname, strerror(errno)); | |
206 | if (die) | |
207 | exit(1); | |
208 | return errno; | |
209 | } | |
210 | #ifdef IO_DEBUG | |
211 | fprintf(stderr, "readbufr read %ubytes, blkno=%llu(%llu), %p\n", | |
212 | BBTOB(len), BBTOOFF64(blkno), blkno, buf); | |
213 | #endif | |
214 | return 0; | |
215 | } | |
216 | ||
217 | xfs_buf_t * | |
218 | libxfs_readbuf(dev_t dev, xfs_daddr_t blkno, int len, int die) | |
219 | { | |
220 | xfs_buf_t *buf; | |
221 | int error; | |
222 | ||
223 | buf = libxfs_getbuf(dev, blkno, len); | |
224 | error = libxfs_readbufr(dev, blkno, buf, len, die); | |
225 | if (error) { | |
226 | libxfs_putbuf(buf); | |
227 | return NULL; | |
228 | } | |
229 | return buf; | |
230 | } | |
231 | ||
232 | xfs_buf_t * | |
233 | libxfs_getsb(xfs_mount_t *mp, int die) | |
234 | { | |
235 | return libxfs_readbuf(mp->m_dev, XFS_SB_DADDR, | |
236 | XFS_FSB_TO_BB(mp, 1), die); | |
237 | } | |
238 | ||
239 | int | |
240 | libxfs_writebuf_int(xfs_buf_t *buf, int die) | |
241 | { | |
242 | int sts; | |
243 | int fd = libxfs_device_to_fd(buf->b_dev); | |
244 | ||
245 | if (lseek64(fd, BBTOOFF64(buf->b_blkno), SEEK_SET) < 0) { | |
5b64e00a NS |
246 | fprintf(stderr, "%s: lseek64 to %llu failed: %s\n", progname, |
247 | (unsigned long long)BBTOOFF64(buf->b_blkno), strerror(errno)); | |
2bd0ea18 NS |
248 | ASSERT(0); |
249 | if (die) | |
250 | exit(1); | |
251 | return errno; | |
252 | } | |
253 | #ifdef IO_DEBUG | |
254 | fprintf(stderr, "writing %ubytes at blkno=%llu(%llu), %p\n", | |
255 | buf->b_bcount, BBTOOFF64(buf->b_blkno), buf->b_blkno, buf); | |
256 | #endif | |
257 | sts = write(fd, buf->b_addr, buf->b_bcount); | |
258 | if (sts < 0) { | |
259 | fprintf(stderr, "%s: write failed: %s\n", | |
260 | progname, strerror(errno)); | |
261 | ASSERT(0); | |
262 | if (die) | |
263 | exit(1); | |
264 | return errno; | |
265 | } | |
266 | else if (sts != buf->b_bcount) { | |
267 | fprintf(stderr, "%s: error - wrote only %d of %d bytes\n", | |
268 | progname, sts, buf->b_bcount); | |
269 | if (die) | |
270 | exit(1); | |
271 | return EIO; | |
272 | } | |
273 | return 0; | |
274 | } | |
275 | ||
276 | int | |
277 | libxfs_writebuf(xfs_buf_t *buf, int die) | |
278 | { | |
279 | int error = libxfs_writebuf_int(buf, die); | |
280 | libxfs_putbuf(buf); | |
281 | return error; | |
282 | } | |
283 | ||
284 | void | |
285 | libxfs_putbuf(xfs_buf_t *buf) | |
286 | { | |
287 | if (buf != NULL) { | |
288 | xfs_buf_log_item_t *bip; | |
289 | extern xfs_zone_t *xfs_buf_item_zone; | |
290 | ||
291 | bip = XFS_BUF_FSPRIVATE(buf, xfs_buf_log_item_t *); | |
292 | ||
293 | if (bip) | |
294 | libxfs_zone_free(xfs_buf_item_zone, bip); | |
295 | #ifdef IO_DEBUG | |
296 | fprintf(stderr, "putbuf released %ubytes, %p\n", | |
297 | buf->b_bcount, buf); | |
298 | #endif | |
299 | free(buf); | |
300 | buf = NULL; | |
301 | } | |
302 | } | |
303 | ||
304 | ||
305 | /* | |
306 | * Simple memory interface | |
307 | */ | |
308 | ||
309 | xfs_zone_t * | |
310 | libxfs_zone_init(int size, char *name) | |
311 | { | |
312 | xfs_zone_t *ptr; | |
313 | ||
314 | if ((ptr = malloc(sizeof(xfs_zone_t))) == NULL) { | |
315 | fprintf(stderr, "%s: zone init failed (%s, %d bytes): %s\n", | |
5b64e00a | 316 | progname, name, (int)sizeof(xfs_zone_t), strerror(errno)); |
2bd0ea18 NS |
317 | exit(1); |
318 | } | |
319 | ptr->zone_unitsize = size; | |
320 | ptr->zone_name = name; | |
321 | #ifdef MEM_DEBUG | |
322 | ptr->allocated = 0; | |
323 | fprintf(stderr, "new zone %p for \"%s\", size=%d\n", ptr, name, size); | |
324 | #endif | |
325 | return ptr; | |
326 | } | |
327 | ||
328 | void * | |
329 | libxfs_zone_zalloc(xfs_zone_t *z) | |
330 | { | |
331 | void *ptr; | |
332 | ||
333 | ASSERT(z != NULL); | |
334 | if ((ptr = calloc(z->zone_unitsize, 1)) == NULL) { | |
335 | fprintf(stderr, "%s: zone calloc failed (%s, %d bytes): %s\n", | |
336 | progname, z->zone_name, z->zone_unitsize, | |
337 | strerror(errno)); | |
338 | exit(1); | |
339 | } | |
340 | #ifdef MEM_DEBUG | |
341 | z->allocated++; | |
342 | fprintf(stderr, "## zone alloc'd item %p from %s (%d bytes) (%d active)\n", | |
343 | ptr, z->zone_name, z->zone_unitsize, | |
344 | z->allocated); | |
345 | #endif | |
346 | return ptr; | |
347 | } | |
348 | ||
349 | void | |
350 | libxfs_zone_free(xfs_zone_t *z, void *ptr) | |
351 | { | |
352 | #ifdef MEM_DEBUG | |
353 | z->allocated--; | |
354 | fprintf(stderr, "## zone freed item %p from %s (%d bytes) (%d active)\n", | |
355 | ptr, z->zone_name, z->zone_unitsize, | |
356 | z->allocated); | |
357 | #endif | |
358 | if (ptr != NULL) { | |
359 | free(ptr); | |
360 | ptr = NULL; | |
361 | } | |
362 | } | |
363 | ||
364 | void * | |
365 | libxfs_malloc(size_t size) | |
366 | { | |
367 | void *ptr; | |
368 | ||
044fe078 NS |
369 | if ((ptr = calloc(1, size)) == NULL) { |
370 | fprintf(stderr, "%s: calloc failed (%d bytes): %s\n", | |
5b64e00a | 371 | progname, (int)size, strerror(errno)); |
2bd0ea18 NS |
372 | exit(1); |
373 | } | |
374 | #ifdef MEM_DEBUG | |
044fe078 | 375 | fprintf(stderr, "## calloc'd item %p size %d bytes\n", |
2bd0ea18 NS |
376 | ptr, size); |
377 | #endif | |
378 | return ptr; | |
379 | } | |
380 | ||
381 | void | |
382 | libxfs_free(void *ptr) | |
383 | { | |
384 | #ifdef MEM_DEBUG | |
385 | fprintf(stderr, "## freed item %p\n", | |
386 | ptr); | |
387 | #endif | |
388 | if (ptr != NULL) { | |
389 | free(ptr); | |
390 | ptr = NULL; | |
391 | } | |
392 | } | |
393 | ||
394 | void * | |
395 | libxfs_realloc(void *ptr, size_t size) | |
396 | { | |
397 | #ifdef MEM_DEBUG | |
398 | void *optr=ptr; | |
399 | #endif | |
400 | if ((ptr = realloc(ptr, size)) == NULL) { | |
401 | fprintf(stderr, "%s: realloc failed (%d bytes): %s\n", | |
5b64e00a | 402 | progname, (int)size, strerror(errno)); |
2bd0ea18 NS |
403 | exit(1); |
404 | } | |
405 | #ifdef MEM_DEBUG | |
406 | fprintf(stderr, "## realloc'd item %p now %p size %d bytes\n", | |
407 | optr, ptr, size); | |
408 | #endif | |
409 | return ptr; | |
410 | } | |
411 | ||
412 | ||
413 | int | |
414 | libxfs_iget(xfs_mount_t *mp, xfs_trans_t *tp, xfs_ino_t ino, uint lock_flags, | |
415 | xfs_inode_t **ipp, xfs_daddr_t bno) | |
416 | { | |
417 | xfs_inode_t *ip; | |
418 | int error; | |
419 | ||
420 | error = libxfs_iread(mp, tp, ino, &ip, bno); | |
421 | if (error) | |
422 | return error; | |
423 | *ipp = ip; | |
424 | return 0; | |
425 | } | |
426 | ||
427 | void | |
428 | libxfs_iput(xfs_inode_t *ip, uint lock_flags) | |
429 | { | |
430 | extern xfs_zone_t *xfs_ili_zone; | |
431 | extern xfs_zone_t *xfs_inode_zone; | |
432 | ||
433 | if (ip != NULL) { | |
434 | ||
435 | /* free attached inode log item */ | |
436 | if (ip->i_itemp) | |
437 | libxfs_zone_free(xfs_ili_zone, ip->i_itemp); | |
438 | ip->i_itemp = NULL; | |
439 | ||
440 | libxfs_zone_free(xfs_inode_zone, ip); | |
441 | ip = NULL; | |
442 | } | |
443 | } | |
444 | ||
445 | /* | |
446 | * libxfs_mod_sb can be used to copy arbitrary changes to the | |
447 | * in-core superblock into the superblock buffer to be logged. | |
448 | * | |
449 | * In user-space, we simply convert to big-endian, and write the | |
450 | * the whole superblock - the in-core changes have all been made | |
451 | * already. | |
452 | */ | |
453 | void | |
454 | libxfs_mod_sb(xfs_trans_t *tp, __int64_t fields) | |
455 | { | |
2bd0ea18 NS |
456 | xfs_buf_t *bp; |
457 | xfs_mount_t *mp; | |
458 | ||
459 | mp = tp->t_mountp; | |
460 | bp = libxfs_getbuf(mp->m_dev, XFS_SB_DADDR, 1); | |
461 | libxfs_xlate_sb(XFS_BUF_PTR(bp), &mp->m_sb, -1, ARCH_CONVERT, | |
462 | XFS_SB_ALL_BITS); | |
463 | libxfs_writebuf(bp, 1); | |
464 | } |