blob: 0d5fada9119136e793b73cf9d008bae29e43fcf8 [file] [log] [blame]
Koji Satoa17564f2009-04-06 19:01:30 -07001/*
2 * dat.c - NILFS disk address translation.
3 *
4 * Copyright (C) 2006-2008 Nippon Telegraph and Telephone Corporation.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19 *
20 * Written by Koji Sato <koji@osrg.net>.
21 */
22
23#include <linux/types.h>
24#include <linux/buffer_head.h>
25#include <linux/string.h>
26#include <linux/errno.h>
27#include "nilfs.h"
28#include "mdt.h"
29#include "alloc.h"
30#include "dat.h"
31
32
33#define NILFS_CNO_MIN ((__u64)1)
34#define NILFS_CNO_MAX (~(__u64)0)
35
Vyacheslav Dubeykof5974c82012-07-30 14:42:10 -070036/**
37 * struct nilfs_dat_info - on-memory private data of DAT file
38 * @mi: on-memory private data of metadata file
39 * @palloc_cache: persistent object allocator cache of DAT file
40 * @shadow: shadow map of DAT file
41 */
Ryusuke Konishi8908b2f2009-11-14 16:35:01 +090042struct nilfs_dat_info {
43 struct nilfs_mdt_info mi;
44 struct nilfs_palloc_cache palloc_cache;
Ryusuke Konishic1c1d70922010-08-29 12:44:56 +090045 struct nilfs_shadow_map shadow;
Ryusuke Konishi8908b2f2009-11-14 16:35:01 +090046};
47
48static inline struct nilfs_dat_info *NILFS_DAT_I(struct inode *dat)
49{
50 return (struct nilfs_dat_info *)NILFS_MDT(dat);
51}
52
Koji Satoa17564f2009-04-06 19:01:30 -070053static int nilfs_dat_prepare_entry(struct inode *dat,
54 struct nilfs_palloc_req *req, int create)
55{
56 return nilfs_palloc_get_entry_block(dat, req->pr_entry_nr,
57 create, &req->pr_entry_bh);
58}
59
60static void nilfs_dat_commit_entry(struct inode *dat,
61 struct nilfs_palloc_req *req)
62{
Ryusuke Konishi5fc7b142011-05-05 12:56:51 +090063 mark_buffer_dirty(req->pr_entry_bh);
Koji Satoa17564f2009-04-06 19:01:30 -070064 nilfs_mdt_mark_dirty(dat);
65 brelse(req->pr_entry_bh);
66}
67
68static void nilfs_dat_abort_entry(struct inode *dat,
69 struct nilfs_palloc_req *req)
70{
71 brelse(req->pr_entry_bh);
72}
73
74int nilfs_dat_prepare_alloc(struct inode *dat, struct nilfs_palloc_req *req)
75{
76 int ret;
77
78 ret = nilfs_palloc_prepare_alloc_entry(dat, req);
79 if (ret < 0)
80 return ret;
81
82 ret = nilfs_dat_prepare_entry(dat, req, 1);
83 if (ret < 0)
84 nilfs_palloc_abort_alloc_entry(dat, req);
85
86 return ret;
87}
88
89void nilfs_dat_commit_alloc(struct inode *dat, struct nilfs_palloc_req *req)
90{
91 struct nilfs_dat_entry *entry;
92 void *kaddr;
93
Cong Wang7b9c0972011-11-25 23:14:33 +080094 kaddr = kmap_atomic(req->pr_entry_bh->b_page);
Koji Satoa17564f2009-04-06 19:01:30 -070095 entry = nilfs_palloc_block_get_entry(dat, req->pr_entry_nr,
96 req->pr_entry_bh, kaddr);
97 entry->de_start = cpu_to_le64(NILFS_CNO_MIN);
98 entry->de_end = cpu_to_le64(NILFS_CNO_MAX);
99 entry->de_blocknr = cpu_to_le64(0);
Cong Wang7b9c0972011-11-25 23:14:33 +0800100 kunmap_atomic(kaddr);
Koji Satoa17564f2009-04-06 19:01:30 -0700101
102 nilfs_palloc_commit_alloc_entry(dat, req);
103 nilfs_dat_commit_entry(dat, req);
104}
105
106void nilfs_dat_abort_alloc(struct inode *dat, struct nilfs_palloc_req *req)
107{
108 nilfs_dat_abort_entry(dat, req);
109 nilfs_palloc_abort_alloc_entry(dat, req);
110}
111
Jiro SEKIBAabc0b502010-10-08 22:37:27 +0900112static void nilfs_dat_commit_free(struct inode *dat,
113 struct nilfs_palloc_req *req)
Koji Satoa17564f2009-04-06 19:01:30 -0700114{
115 struct nilfs_dat_entry *entry;
116 void *kaddr;
117
Cong Wang7b9c0972011-11-25 23:14:33 +0800118 kaddr = kmap_atomic(req->pr_entry_bh->b_page);
Koji Satoa17564f2009-04-06 19:01:30 -0700119 entry = nilfs_palloc_block_get_entry(dat, req->pr_entry_nr,
120 req->pr_entry_bh, kaddr);
121 entry->de_start = cpu_to_le64(NILFS_CNO_MIN);
122 entry->de_end = cpu_to_le64(NILFS_CNO_MIN);
123 entry->de_blocknr = cpu_to_le64(0);
Cong Wang7b9c0972011-11-25 23:14:33 +0800124 kunmap_atomic(kaddr);
Koji Satoa17564f2009-04-06 19:01:30 -0700125
126 nilfs_dat_commit_entry(dat, req);
127 nilfs_palloc_commit_free_entry(dat, req);
128}
129
Koji Satoa17564f2009-04-06 19:01:30 -0700130int nilfs_dat_prepare_start(struct inode *dat, struct nilfs_palloc_req *req)
131{
132 int ret;
133
134 ret = nilfs_dat_prepare_entry(dat, req, 0);
Ryusuke Konishi1f5abe72009-04-06 19:01:55 -0700135 WARN_ON(ret == -ENOENT);
Koji Satoa17564f2009-04-06 19:01:30 -0700136 return ret;
137}
138
139void nilfs_dat_commit_start(struct inode *dat, struct nilfs_palloc_req *req,
140 sector_t blocknr)
141{
142 struct nilfs_dat_entry *entry;
143 void *kaddr;
144
Cong Wang7b9c0972011-11-25 23:14:33 +0800145 kaddr = kmap_atomic(req->pr_entry_bh->b_page);
Koji Satoa17564f2009-04-06 19:01:30 -0700146 entry = nilfs_palloc_block_get_entry(dat, req->pr_entry_nr,
147 req->pr_entry_bh, kaddr);
148 entry->de_start = cpu_to_le64(nilfs_mdt_cno(dat));
Koji Satoa17564f2009-04-06 19:01:30 -0700149 entry->de_blocknr = cpu_to_le64(blocknr);
Cong Wang7b9c0972011-11-25 23:14:33 +0800150 kunmap_atomic(kaddr);
Koji Satoa17564f2009-04-06 19:01:30 -0700151
152 nilfs_dat_commit_entry(dat, req);
153}
154
Koji Satoa17564f2009-04-06 19:01:30 -0700155int nilfs_dat_prepare_end(struct inode *dat, struct nilfs_palloc_req *req)
156{
157 struct nilfs_dat_entry *entry;
158 __u64 start;
159 sector_t blocknr;
160 void *kaddr;
161 int ret;
162
163 ret = nilfs_dat_prepare_entry(dat, req, 0);
164 if (ret < 0) {
Ryusuke Konishi1f5abe72009-04-06 19:01:55 -0700165 WARN_ON(ret == -ENOENT);
Koji Satoa17564f2009-04-06 19:01:30 -0700166 return ret;
167 }
168
Cong Wang7b9c0972011-11-25 23:14:33 +0800169 kaddr = kmap_atomic(req->pr_entry_bh->b_page);
Koji Satoa17564f2009-04-06 19:01:30 -0700170 entry = nilfs_palloc_block_get_entry(dat, req->pr_entry_nr,
171 req->pr_entry_bh, kaddr);
172 start = le64_to_cpu(entry->de_start);
173 blocknr = le64_to_cpu(entry->de_blocknr);
Cong Wang7b9c0972011-11-25 23:14:33 +0800174 kunmap_atomic(kaddr);
Koji Satoa17564f2009-04-06 19:01:30 -0700175
176 if (blocknr == 0) {
177 ret = nilfs_palloc_prepare_free_entry(dat, req);
178 if (ret < 0) {
179 nilfs_dat_abort_entry(dat, req);
180 return ret;
181 }
182 }
183
184 return 0;
185}
186
187void nilfs_dat_commit_end(struct inode *dat, struct nilfs_palloc_req *req,
188 int dead)
189{
190 struct nilfs_dat_entry *entry;
191 __u64 start, end;
192 sector_t blocknr;
193 void *kaddr;
194
Cong Wang7b9c0972011-11-25 23:14:33 +0800195 kaddr = kmap_atomic(req->pr_entry_bh->b_page);
Koji Satoa17564f2009-04-06 19:01:30 -0700196 entry = nilfs_palloc_block_get_entry(dat, req->pr_entry_nr,
197 req->pr_entry_bh, kaddr);
198 end = start = le64_to_cpu(entry->de_start);
199 if (!dead) {
200 end = nilfs_mdt_cno(dat);
Ryusuke Konishi1f5abe72009-04-06 19:01:55 -0700201 WARN_ON(start > end);
Koji Satoa17564f2009-04-06 19:01:30 -0700202 }
203 entry->de_end = cpu_to_le64(end);
204 blocknr = le64_to_cpu(entry->de_blocknr);
Cong Wang7b9c0972011-11-25 23:14:33 +0800205 kunmap_atomic(kaddr);
Koji Satoa17564f2009-04-06 19:01:30 -0700206
207 if (blocknr == 0)
208 nilfs_dat_commit_free(dat, req);
209 else
210 nilfs_dat_commit_entry(dat, req);
211}
212
213void nilfs_dat_abort_end(struct inode *dat, struct nilfs_palloc_req *req)
214{
215 struct nilfs_dat_entry *entry;
216 __u64 start;
217 sector_t blocknr;
218 void *kaddr;
219
Cong Wang7b9c0972011-11-25 23:14:33 +0800220 kaddr = kmap_atomic(req->pr_entry_bh->b_page);
Koji Satoa17564f2009-04-06 19:01:30 -0700221 entry = nilfs_palloc_block_get_entry(dat, req->pr_entry_nr,
222 req->pr_entry_bh, kaddr);
223 start = le64_to_cpu(entry->de_start);
224 blocknr = le64_to_cpu(entry->de_blocknr);
Cong Wang7b9c0972011-11-25 23:14:33 +0800225 kunmap_atomic(kaddr);
Koji Satoa17564f2009-04-06 19:01:30 -0700226
227 if (start == nilfs_mdt_cno(dat) && blocknr == 0)
228 nilfs_palloc_abort_free_entry(dat, req);
229 nilfs_dat_abort_entry(dat, req);
230}
231
Ryusuke Konishibd8169e2009-08-15 17:22:13 +0900232int nilfs_dat_prepare_update(struct inode *dat,
233 struct nilfs_palloc_req *oldreq,
234 struct nilfs_palloc_req *newreq)
235{
236 int ret;
237
238 ret = nilfs_dat_prepare_end(dat, oldreq);
239 if (!ret) {
240 ret = nilfs_dat_prepare_alloc(dat, newreq);
241 if (ret < 0)
242 nilfs_dat_abort_end(dat, oldreq);
243 }
244 return ret;
245}
246
247void nilfs_dat_commit_update(struct inode *dat,
248 struct nilfs_palloc_req *oldreq,
249 struct nilfs_palloc_req *newreq, int dead)
250{
251 nilfs_dat_commit_end(dat, oldreq, dead);
252 nilfs_dat_commit_alloc(dat, newreq);
253}
254
255void nilfs_dat_abort_update(struct inode *dat,
256 struct nilfs_palloc_req *oldreq,
257 struct nilfs_palloc_req *newreq)
258{
259 nilfs_dat_abort_end(dat, oldreq);
260 nilfs_dat_abort_alloc(dat, newreq);
261}
262
Koji Satoa17564f2009-04-06 19:01:30 -0700263/**
264 * nilfs_dat_mark_dirty -
265 * @dat: DAT file inode
266 * @vblocknr: virtual block number
267 *
268 * Description:
269 *
270 * Return Value: On success, 0 is returned. On error, one of the following
271 * negative error codes is returned.
272 *
273 * %-EIO - I/O error.
274 *
275 * %-ENOMEM - Insufficient amount of memory available.
276 */
277int nilfs_dat_mark_dirty(struct inode *dat, __u64 vblocknr)
278{
279 struct nilfs_palloc_req req;
280 int ret;
281
282 req.pr_entry_nr = vblocknr;
283 ret = nilfs_dat_prepare_entry(dat, &req, 0);
284 if (ret == 0)
285 nilfs_dat_commit_entry(dat, &req);
286 return ret;
287}
288
289/**
290 * nilfs_dat_freev - free virtual block numbers
291 * @dat: DAT file inode
292 * @vblocknrs: array of virtual block numbers
293 * @nitems: number of virtual block numbers
294 *
295 * Description: nilfs_dat_freev() frees the virtual block numbers specified by
296 * @vblocknrs and @nitems.
297 *
298 * Return Value: On success, 0 is returned. On error, one of the following
Ryusuke Konishi7a650042010-03-14 03:32:40 +0900299 * negative error codes is returned.
Koji Satoa17564f2009-04-06 19:01:30 -0700300 *
301 * %-EIO - I/O error.
302 *
303 * %-ENOMEM - Insufficient amount of memory available.
304 *
305 * %-ENOENT - The virtual block number have not been allocated.
306 */
307int nilfs_dat_freev(struct inode *dat, __u64 *vblocknrs, size_t nitems)
308{
309 return nilfs_palloc_freev(dat, vblocknrs, nitems);
310}
311
312/**
313 * nilfs_dat_move - change a block number
314 * @dat: DAT file inode
315 * @vblocknr: virtual block number
316 * @blocknr: block number
317 *
318 * Description: nilfs_dat_move() changes the block number associated with
319 * @vblocknr to @blocknr.
320 *
321 * Return Value: On success, 0 is returned. On error, one of the following
322 * negative error codes is returned.
323 *
324 * %-EIO - I/O error.
325 *
326 * %-ENOMEM - Insufficient amount of memory available.
327 */
328int nilfs_dat_move(struct inode *dat, __u64 vblocknr, sector_t blocknr)
329{
330 struct buffer_head *entry_bh;
331 struct nilfs_dat_entry *entry;
332 void *kaddr;
333 int ret;
334
335 ret = nilfs_palloc_get_entry_block(dat, vblocknr, 0, &entry_bh);
336 if (ret < 0)
337 return ret;
Ryusuke Konishic1c1d70922010-08-29 12:44:56 +0900338
339 /*
340 * The given disk block number (blocknr) is not yet written to
341 * the device at this point.
342 *
343 * To prevent nilfs_dat_translate() from returning the
Ryusuke Konishif6c26ec2010-11-24 02:18:59 +0900344 * uncommitted block number, this makes a copy of the entry
Ryusuke Konishic1c1d70922010-08-29 12:44:56 +0900345 * buffer and redirects nilfs_dat_translate() to the copy.
346 */
347 if (!buffer_nilfs_redirected(entry_bh)) {
348 ret = nilfs_mdt_freeze_buffer(dat, entry_bh);
349 if (ret) {
350 brelse(entry_bh);
351 return ret;
352 }
353 }
354
Cong Wang7b9c0972011-11-25 23:14:33 +0800355 kaddr = kmap_atomic(entry_bh->b_page);
Koji Satoa17564f2009-04-06 19:01:30 -0700356 entry = nilfs_palloc_block_get_entry(dat, vblocknr, entry_bh, kaddr);
Ryusuke Konishi1f5abe72009-04-06 19:01:55 -0700357 if (unlikely(entry->de_blocknr == cpu_to_le64(0))) {
Koji Satoa17564f2009-04-06 19:01:30 -0700358 printk(KERN_CRIT "%s: vbn = %llu, [%llu, %llu)\n", __func__,
359 (unsigned long long)vblocknr,
360 (unsigned long long)le64_to_cpu(entry->de_start),
361 (unsigned long long)le64_to_cpu(entry->de_end));
Cong Wang7b9c0972011-11-25 23:14:33 +0800362 kunmap_atomic(kaddr);
Ryusuke Konishi1f5abe72009-04-06 19:01:55 -0700363 brelse(entry_bh);
364 return -EINVAL;
Koji Satoa17564f2009-04-06 19:01:30 -0700365 }
Ryusuke Konishi1f5abe72009-04-06 19:01:55 -0700366 WARN_ON(blocknr == 0);
Koji Satoa17564f2009-04-06 19:01:30 -0700367 entry->de_blocknr = cpu_to_le64(blocknr);
Cong Wang7b9c0972011-11-25 23:14:33 +0800368 kunmap_atomic(kaddr);
Koji Satoa17564f2009-04-06 19:01:30 -0700369
Ryusuke Konishi5fc7b142011-05-05 12:56:51 +0900370 mark_buffer_dirty(entry_bh);
Koji Satoa17564f2009-04-06 19:01:30 -0700371 nilfs_mdt_mark_dirty(dat);
372
373 brelse(entry_bh);
374
375 return 0;
376}
377
378/**
379 * nilfs_dat_translate - translate a virtual block number to a block number
380 * @dat: DAT file inode
381 * @vblocknr: virtual block number
382 * @blocknrp: pointer to a block number
383 *
384 * Description: nilfs_dat_translate() maps the virtual block number @vblocknr
385 * to the corresponding block number.
386 *
387 * Return Value: On success, 0 is returned and the block number associated
388 * with @vblocknr is stored in the place pointed by @blocknrp. On error, one
389 * of the following negative error codes is returned.
390 *
391 * %-EIO - I/O error.
392 *
393 * %-ENOMEM - Insufficient amount of memory available.
394 *
395 * %-ENOENT - A block number associated with @vblocknr does not exist.
396 */
397int nilfs_dat_translate(struct inode *dat, __u64 vblocknr, sector_t *blocknrp)
398{
Ryusuke Konishic1c1d70922010-08-29 12:44:56 +0900399 struct buffer_head *entry_bh, *bh;
Koji Satoa17564f2009-04-06 19:01:30 -0700400 struct nilfs_dat_entry *entry;
401 sector_t blocknr;
402 void *kaddr;
403 int ret;
404
405 ret = nilfs_palloc_get_entry_block(dat, vblocknr, 0, &entry_bh);
406 if (ret < 0)
407 return ret;
408
Ryusuke Konishic1c1d70922010-08-29 12:44:56 +0900409 if (!nilfs_doing_gc() && buffer_nilfs_redirected(entry_bh)) {
410 bh = nilfs_mdt_get_frozen_buffer(dat, entry_bh);
411 if (bh) {
412 WARN_ON(!buffer_uptodate(bh));
413 brelse(entry_bh);
414 entry_bh = bh;
415 }
416 }
417
Cong Wang7b9c0972011-11-25 23:14:33 +0800418 kaddr = kmap_atomic(entry_bh->b_page);
Koji Satoa17564f2009-04-06 19:01:30 -0700419 entry = nilfs_palloc_block_get_entry(dat, vblocknr, entry_bh, kaddr);
420 blocknr = le64_to_cpu(entry->de_blocknr);
421 if (blocknr == 0) {
422 ret = -ENOENT;
423 goto out;
424 }
Jiro SEKIBA086d1762010-02-05 23:15:26 +0900425 *blocknrp = blocknr;
Koji Satoa17564f2009-04-06 19:01:30 -0700426
427 out:
Cong Wang7b9c0972011-11-25 23:14:33 +0800428 kunmap_atomic(kaddr);
Koji Satoa17564f2009-04-06 19:01:30 -0700429 brelse(entry_bh);
430 return ret;
431}
432
Ryusuke Konishi003ff182009-05-12 03:58:47 +0900433ssize_t nilfs_dat_get_vinfo(struct inode *dat, void *buf, unsigned visz,
Koji Satoa17564f2009-04-06 19:01:30 -0700434 size_t nvi)
435{
436 struct buffer_head *entry_bh;
437 struct nilfs_dat_entry *entry;
Ryusuke Konishi003ff182009-05-12 03:58:47 +0900438 struct nilfs_vinfo *vinfo = buf;
Koji Satoa17564f2009-04-06 19:01:30 -0700439 __u64 first, last;
440 void *kaddr;
441 unsigned long entries_per_block = NILFS_MDT(dat)->mi_entries_per_block;
442 int i, j, n, ret;
443
444 for (i = 0; i < nvi; i += n) {
Ryusuke Konishi003ff182009-05-12 03:58:47 +0900445 ret = nilfs_palloc_get_entry_block(dat, vinfo->vi_vblocknr,
Koji Satoa17564f2009-04-06 19:01:30 -0700446 0, &entry_bh);
447 if (ret < 0)
448 return ret;
Cong Wang7b9c0972011-11-25 23:14:33 +0800449 kaddr = kmap_atomic(entry_bh->b_page);
Koji Satoa17564f2009-04-06 19:01:30 -0700450 /* last virtual block number in this block */
Ryusuke Konishi003ff182009-05-12 03:58:47 +0900451 first = vinfo->vi_vblocknr;
Koji Satoa17564f2009-04-06 19:01:30 -0700452 do_div(first, entries_per_block);
453 first *= entries_per_block;
454 last = first + entries_per_block - 1;
455 for (j = i, n = 0;
Ryusuke Konishi003ff182009-05-12 03:58:47 +0900456 j < nvi && vinfo->vi_vblocknr >= first &&
457 vinfo->vi_vblocknr <= last;
458 j++, n++, vinfo = (void *)vinfo + visz) {
Koji Satoa17564f2009-04-06 19:01:30 -0700459 entry = nilfs_palloc_block_get_entry(
Ryusuke Konishi003ff182009-05-12 03:58:47 +0900460 dat, vinfo->vi_vblocknr, entry_bh, kaddr);
461 vinfo->vi_start = le64_to_cpu(entry->de_start);
462 vinfo->vi_end = le64_to_cpu(entry->de_end);
463 vinfo->vi_blocknr = le64_to_cpu(entry->de_blocknr);
Koji Satoa17564f2009-04-06 19:01:30 -0700464 }
Cong Wang7b9c0972011-11-25 23:14:33 +0800465 kunmap_atomic(kaddr);
Koji Satoa17564f2009-04-06 19:01:30 -0700466 brelse(entry_bh);
467 }
468
469 return nvi;
470}
Ryusuke Konishi79739562009-11-12 23:56:43 +0900471
472/**
Ryusuke Konishif1e89c82010-09-05 12:20:59 +0900473 * nilfs_dat_read - read or get dat inode
474 * @sb: super block instance
Ryusuke Konishi79739562009-11-12 23:56:43 +0900475 * @entry_size: size of a dat entry
Ryusuke Konishif1e89c82010-09-05 12:20:59 +0900476 * @raw_inode: on-disk dat inode
477 * @inodep: buffer to store the inode
Ryusuke Konishi79739562009-11-12 23:56:43 +0900478 */
Ryusuke Konishif1e89c82010-09-05 12:20:59 +0900479int nilfs_dat_read(struct super_block *sb, size_t entry_size,
480 struct nilfs_inode *raw_inode, struct inode **inodep)
Ryusuke Konishi79739562009-11-12 23:56:43 +0900481{
482 static struct lock_class_key dat_lock_key;
483 struct inode *dat;
Ryusuke Konishi8908b2f2009-11-14 16:35:01 +0900484 struct nilfs_dat_info *di;
Ryusuke Konishi79739562009-11-12 23:56:43 +0900485 int err;
486
Ryusuke Konishi0ec060d2014-04-03 14:50:31 -0700487 if (entry_size > sb->s_blocksize) {
488 printk(KERN_ERR
489 "NILFS: too large DAT entry size: %zu bytes.\n",
490 entry_size);
491 return -EINVAL;
492 } else if (entry_size < NILFS_MIN_DAT_ENTRY_SIZE) {
493 printk(KERN_ERR
494 "NILFS: too small DAT entry size: %zu bytes.\n",
495 entry_size);
496 return -EINVAL;
497 }
498
Ryusuke Konishif1e89c82010-09-05 12:20:59 +0900499 dat = nilfs_iget_locked(sb, NULL, NILFS_DAT_INO);
500 if (unlikely(!dat))
501 return -ENOMEM;
502 if (!(dat->i_state & I_NEW))
503 goto out;
Ryusuke Konishi8908b2f2009-11-14 16:35:01 +0900504
Ryusuke Konishif1e89c82010-09-05 12:20:59 +0900505 err = nilfs_mdt_init(dat, NILFS_MDT_GFP, sizeof(*di));
506 if (err)
507 goto failed;
508
509 err = nilfs_palloc_init_blockgroup(dat, entry_size);
510 if (err)
511 goto failed;
512
513 di = NILFS_DAT_I(dat);
514 lockdep_set_class(&di->mi.mi_sem, &dat_lock_key);
515 nilfs_palloc_setup_cache(dat, &di->palloc_cache);
516 nilfs_mdt_setup_shadow_map(dat, &di->shadow);
517
518 err = nilfs_read_inode_common(dat, raw_inode);
519 if (err)
520 goto failed;
521
522 unlock_new_inode(dat);
523 out:
524 *inodep = dat;
525 return 0;
526 failed:
527 iget_failed(dat);
528 return err;
Ryusuke Konishi79739562009-11-12 23:56:43 +0900529}