blob: 7dc23f100e579df17aec0499a7af609e9c0dc5af [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;
Koji Satoa17564f2009-04-06 19:01:30 -0700158 sector_t blocknr;
159 void *kaddr;
160 int ret;
161
162 ret = nilfs_dat_prepare_entry(dat, req, 0);
163 if (ret < 0) {
Ryusuke Konishi1f5abe72009-04-06 19:01:55 -0700164 WARN_ON(ret == -ENOENT);
Koji Satoa17564f2009-04-06 19:01:30 -0700165 return ret;
166 }
167
Cong Wang7b9c0972011-11-25 23:14:33 +0800168 kaddr = kmap_atomic(req->pr_entry_bh->b_page);
Koji Satoa17564f2009-04-06 19:01:30 -0700169 entry = nilfs_palloc_block_get_entry(dat, req->pr_entry_nr,
170 req->pr_entry_bh, kaddr);
Koji Satoa17564f2009-04-06 19:01:30 -0700171 blocknr = le64_to_cpu(entry->de_blocknr);
Cong Wang7b9c0972011-11-25 23:14:33 +0800172 kunmap_atomic(kaddr);
Koji Satoa17564f2009-04-06 19:01:30 -0700173
174 if (blocknr == 0) {
175 ret = nilfs_palloc_prepare_free_entry(dat, req);
176 if (ret < 0) {
177 nilfs_dat_abort_entry(dat, req);
178 return ret;
179 }
180 }
181
182 return 0;
183}
184
185void nilfs_dat_commit_end(struct inode *dat, struct nilfs_palloc_req *req,
186 int dead)
187{
188 struct nilfs_dat_entry *entry;
189 __u64 start, end;
190 sector_t blocknr;
191 void *kaddr;
192
Cong Wang7b9c0972011-11-25 23:14:33 +0800193 kaddr = kmap_atomic(req->pr_entry_bh->b_page);
Koji Satoa17564f2009-04-06 19:01:30 -0700194 entry = nilfs_palloc_block_get_entry(dat, req->pr_entry_nr,
195 req->pr_entry_bh, kaddr);
196 end = start = le64_to_cpu(entry->de_start);
197 if (!dead) {
198 end = nilfs_mdt_cno(dat);
Ryusuke Konishi1f5abe72009-04-06 19:01:55 -0700199 WARN_ON(start > end);
Koji Satoa17564f2009-04-06 19:01:30 -0700200 }
201 entry->de_end = cpu_to_le64(end);
202 blocknr = le64_to_cpu(entry->de_blocknr);
Cong Wang7b9c0972011-11-25 23:14:33 +0800203 kunmap_atomic(kaddr);
Koji Satoa17564f2009-04-06 19:01:30 -0700204
205 if (blocknr == 0)
206 nilfs_dat_commit_free(dat, req);
207 else
208 nilfs_dat_commit_entry(dat, req);
209}
210
211void nilfs_dat_abort_end(struct inode *dat, struct nilfs_palloc_req *req)
212{
213 struct nilfs_dat_entry *entry;
214 __u64 start;
215 sector_t blocknr;
216 void *kaddr;
217
Cong Wang7b9c0972011-11-25 23:14:33 +0800218 kaddr = kmap_atomic(req->pr_entry_bh->b_page);
Koji Satoa17564f2009-04-06 19:01:30 -0700219 entry = nilfs_palloc_block_get_entry(dat, req->pr_entry_nr,
220 req->pr_entry_bh, kaddr);
221 start = le64_to_cpu(entry->de_start);
222 blocknr = le64_to_cpu(entry->de_blocknr);
Cong Wang7b9c0972011-11-25 23:14:33 +0800223 kunmap_atomic(kaddr);
Koji Satoa17564f2009-04-06 19:01:30 -0700224
225 if (start == nilfs_mdt_cno(dat) && blocknr == 0)
226 nilfs_palloc_abort_free_entry(dat, req);
227 nilfs_dat_abort_entry(dat, req);
228}
229
Ryusuke Konishibd8169e2009-08-15 17:22:13 +0900230int nilfs_dat_prepare_update(struct inode *dat,
231 struct nilfs_palloc_req *oldreq,
232 struct nilfs_palloc_req *newreq)
233{
234 int ret;
235
236 ret = nilfs_dat_prepare_end(dat, oldreq);
237 if (!ret) {
238 ret = nilfs_dat_prepare_alloc(dat, newreq);
239 if (ret < 0)
240 nilfs_dat_abort_end(dat, oldreq);
241 }
242 return ret;
243}
244
245void nilfs_dat_commit_update(struct inode *dat,
246 struct nilfs_palloc_req *oldreq,
247 struct nilfs_palloc_req *newreq, int dead)
248{
249 nilfs_dat_commit_end(dat, oldreq, dead);
250 nilfs_dat_commit_alloc(dat, newreq);
251}
252
253void nilfs_dat_abort_update(struct inode *dat,
254 struct nilfs_palloc_req *oldreq,
255 struct nilfs_palloc_req *newreq)
256{
257 nilfs_dat_abort_end(dat, oldreq);
258 nilfs_dat_abort_alloc(dat, newreq);
259}
260
Koji Satoa17564f2009-04-06 19:01:30 -0700261/**
262 * nilfs_dat_mark_dirty -
263 * @dat: DAT file inode
264 * @vblocknr: virtual block number
265 *
266 * Description:
267 *
268 * Return Value: On success, 0 is returned. On error, one of the following
269 * negative error codes is returned.
270 *
271 * %-EIO - I/O error.
272 *
273 * %-ENOMEM - Insufficient amount of memory available.
274 */
275int nilfs_dat_mark_dirty(struct inode *dat, __u64 vblocknr)
276{
277 struct nilfs_palloc_req req;
278 int ret;
279
280 req.pr_entry_nr = vblocknr;
281 ret = nilfs_dat_prepare_entry(dat, &req, 0);
282 if (ret == 0)
283 nilfs_dat_commit_entry(dat, &req);
284 return ret;
285}
286
287/**
288 * nilfs_dat_freev - free virtual block numbers
289 * @dat: DAT file inode
290 * @vblocknrs: array of virtual block numbers
291 * @nitems: number of virtual block numbers
292 *
293 * Description: nilfs_dat_freev() frees the virtual block numbers specified by
294 * @vblocknrs and @nitems.
295 *
296 * Return Value: On success, 0 is returned. On error, one of the following
Ryusuke Konishi7a650042010-03-14 03:32:40 +0900297 * negative error codes is returned.
Koji Satoa17564f2009-04-06 19:01:30 -0700298 *
299 * %-EIO - I/O error.
300 *
301 * %-ENOMEM - Insufficient amount of memory available.
302 *
303 * %-ENOENT - The virtual block number have not been allocated.
304 */
305int nilfs_dat_freev(struct inode *dat, __u64 *vblocknrs, size_t nitems)
306{
307 return nilfs_palloc_freev(dat, vblocknrs, nitems);
308}
309
310/**
311 * nilfs_dat_move - change a block number
312 * @dat: DAT file inode
313 * @vblocknr: virtual block number
314 * @blocknr: block number
315 *
316 * Description: nilfs_dat_move() changes the block number associated with
317 * @vblocknr to @blocknr.
318 *
319 * Return Value: On success, 0 is returned. On error, one of the following
320 * negative error codes is returned.
321 *
322 * %-EIO - I/O error.
323 *
324 * %-ENOMEM - Insufficient amount of memory available.
325 */
326int nilfs_dat_move(struct inode *dat, __u64 vblocknr, sector_t blocknr)
327{
328 struct buffer_head *entry_bh;
329 struct nilfs_dat_entry *entry;
330 void *kaddr;
331 int ret;
332
333 ret = nilfs_palloc_get_entry_block(dat, vblocknr, 0, &entry_bh);
334 if (ret < 0)
335 return ret;
Ryusuke Konishic1c1d70922010-08-29 12:44:56 +0900336
337 /*
338 * The given disk block number (blocknr) is not yet written to
339 * the device at this point.
340 *
341 * To prevent nilfs_dat_translate() from returning the
Ryusuke Konishif6c26ec2010-11-24 02:18:59 +0900342 * uncommitted block number, this makes a copy of the entry
Ryusuke Konishic1c1d70922010-08-29 12:44:56 +0900343 * buffer and redirects nilfs_dat_translate() to the copy.
344 */
345 if (!buffer_nilfs_redirected(entry_bh)) {
346 ret = nilfs_mdt_freeze_buffer(dat, entry_bh);
347 if (ret) {
348 brelse(entry_bh);
349 return ret;
350 }
351 }
352
Cong Wang7b9c0972011-11-25 23:14:33 +0800353 kaddr = kmap_atomic(entry_bh->b_page);
Koji Satoa17564f2009-04-06 19:01:30 -0700354 entry = nilfs_palloc_block_get_entry(dat, vblocknr, entry_bh, kaddr);
Ryusuke Konishi1f5abe72009-04-06 19:01:55 -0700355 if (unlikely(entry->de_blocknr == cpu_to_le64(0))) {
Koji Satoa17564f2009-04-06 19:01:30 -0700356 printk(KERN_CRIT "%s: vbn = %llu, [%llu, %llu)\n", __func__,
357 (unsigned long long)vblocknr,
358 (unsigned long long)le64_to_cpu(entry->de_start),
359 (unsigned long long)le64_to_cpu(entry->de_end));
Cong Wang7b9c0972011-11-25 23:14:33 +0800360 kunmap_atomic(kaddr);
Ryusuke Konishi1f5abe72009-04-06 19:01:55 -0700361 brelse(entry_bh);
362 return -EINVAL;
Koji Satoa17564f2009-04-06 19:01:30 -0700363 }
Ryusuke Konishi1f5abe72009-04-06 19:01:55 -0700364 WARN_ON(blocknr == 0);
Koji Satoa17564f2009-04-06 19:01:30 -0700365 entry->de_blocknr = cpu_to_le64(blocknr);
Cong Wang7b9c0972011-11-25 23:14:33 +0800366 kunmap_atomic(kaddr);
Koji Satoa17564f2009-04-06 19:01:30 -0700367
Ryusuke Konishi5fc7b142011-05-05 12:56:51 +0900368 mark_buffer_dirty(entry_bh);
Koji Satoa17564f2009-04-06 19:01:30 -0700369 nilfs_mdt_mark_dirty(dat);
370
371 brelse(entry_bh);
372
373 return 0;
374}
375
376/**
377 * nilfs_dat_translate - translate a virtual block number to a block number
378 * @dat: DAT file inode
379 * @vblocknr: virtual block number
380 * @blocknrp: pointer to a block number
381 *
382 * Description: nilfs_dat_translate() maps the virtual block number @vblocknr
383 * to the corresponding block number.
384 *
385 * Return Value: On success, 0 is returned and the block number associated
386 * with @vblocknr is stored in the place pointed by @blocknrp. On error, one
387 * of the following negative error codes is returned.
388 *
389 * %-EIO - I/O error.
390 *
391 * %-ENOMEM - Insufficient amount of memory available.
392 *
393 * %-ENOENT - A block number associated with @vblocknr does not exist.
394 */
395int nilfs_dat_translate(struct inode *dat, __u64 vblocknr, sector_t *blocknrp)
396{
Ryusuke Konishic1c1d70922010-08-29 12:44:56 +0900397 struct buffer_head *entry_bh, *bh;
Koji Satoa17564f2009-04-06 19:01:30 -0700398 struct nilfs_dat_entry *entry;
399 sector_t blocknr;
400 void *kaddr;
401 int ret;
402
403 ret = nilfs_palloc_get_entry_block(dat, vblocknr, 0, &entry_bh);
404 if (ret < 0)
405 return ret;
406
Ryusuke Konishic1c1d70922010-08-29 12:44:56 +0900407 if (!nilfs_doing_gc() && buffer_nilfs_redirected(entry_bh)) {
408 bh = nilfs_mdt_get_frozen_buffer(dat, entry_bh);
409 if (bh) {
410 WARN_ON(!buffer_uptodate(bh));
411 brelse(entry_bh);
412 entry_bh = bh;
413 }
414 }
415
Cong Wang7b9c0972011-11-25 23:14:33 +0800416 kaddr = kmap_atomic(entry_bh->b_page);
Koji Satoa17564f2009-04-06 19:01:30 -0700417 entry = nilfs_palloc_block_get_entry(dat, vblocknr, entry_bh, kaddr);
418 blocknr = le64_to_cpu(entry->de_blocknr);
419 if (blocknr == 0) {
420 ret = -ENOENT;
421 goto out;
422 }
Jiro SEKIBA086d1762010-02-05 23:15:26 +0900423 *blocknrp = blocknr;
Koji Satoa17564f2009-04-06 19:01:30 -0700424
425 out:
Cong Wang7b9c0972011-11-25 23:14:33 +0800426 kunmap_atomic(kaddr);
Koji Satoa17564f2009-04-06 19:01:30 -0700427 brelse(entry_bh);
428 return ret;
429}
430
Ryusuke Konishi003ff182009-05-12 03:58:47 +0900431ssize_t nilfs_dat_get_vinfo(struct inode *dat, void *buf, unsigned visz,
Koji Satoa17564f2009-04-06 19:01:30 -0700432 size_t nvi)
433{
434 struct buffer_head *entry_bh;
435 struct nilfs_dat_entry *entry;
Ryusuke Konishi003ff182009-05-12 03:58:47 +0900436 struct nilfs_vinfo *vinfo = buf;
Koji Satoa17564f2009-04-06 19:01:30 -0700437 __u64 first, last;
438 void *kaddr;
439 unsigned long entries_per_block = NILFS_MDT(dat)->mi_entries_per_block;
440 int i, j, n, ret;
441
442 for (i = 0; i < nvi; i += n) {
Ryusuke Konishi003ff182009-05-12 03:58:47 +0900443 ret = nilfs_palloc_get_entry_block(dat, vinfo->vi_vblocknr,
Koji Satoa17564f2009-04-06 19:01:30 -0700444 0, &entry_bh);
445 if (ret < 0)
446 return ret;
Cong Wang7b9c0972011-11-25 23:14:33 +0800447 kaddr = kmap_atomic(entry_bh->b_page);
Koji Satoa17564f2009-04-06 19:01:30 -0700448 /* last virtual block number in this block */
Ryusuke Konishi003ff182009-05-12 03:58:47 +0900449 first = vinfo->vi_vblocknr;
Koji Satoa17564f2009-04-06 19:01:30 -0700450 do_div(first, entries_per_block);
451 first *= entries_per_block;
452 last = first + entries_per_block - 1;
453 for (j = i, n = 0;
Ryusuke Konishi003ff182009-05-12 03:58:47 +0900454 j < nvi && vinfo->vi_vblocknr >= first &&
455 vinfo->vi_vblocknr <= last;
456 j++, n++, vinfo = (void *)vinfo + visz) {
Koji Satoa17564f2009-04-06 19:01:30 -0700457 entry = nilfs_palloc_block_get_entry(
Ryusuke Konishi003ff182009-05-12 03:58:47 +0900458 dat, vinfo->vi_vblocknr, entry_bh, kaddr);
459 vinfo->vi_start = le64_to_cpu(entry->de_start);
460 vinfo->vi_end = le64_to_cpu(entry->de_end);
461 vinfo->vi_blocknr = le64_to_cpu(entry->de_blocknr);
Koji Satoa17564f2009-04-06 19:01:30 -0700462 }
Cong Wang7b9c0972011-11-25 23:14:33 +0800463 kunmap_atomic(kaddr);
Koji Satoa17564f2009-04-06 19:01:30 -0700464 brelse(entry_bh);
465 }
466
467 return nvi;
468}
Ryusuke Konishi79739562009-11-12 23:56:43 +0900469
470/**
Ryusuke Konishif1e89c82010-09-05 12:20:59 +0900471 * nilfs_dat_read - read or get dat inode
472 * @sb: super block instance
Ryusuke Konishi79739562009-11-12 23:56:43 +0900473 * @entry_size: size of a dat entry
Ryusuke Konishif1e89c82010-09-05 12:20:59 +0900474 * @raw_inode: on-disk dat inode
475 * @inodep: buffer to store the inode
Ryusuke Konishi79739562009-11-12 23:56:43 +0900476 */
Ryusuke Konishif1e89c82010-09-05 12:20:59 +0900477int nilfs_dat_read(struct super_block *sb, size_t entry_size,
478 struct nilfs_inode *raw_inode, struct inode **inodep)
Ryusuke Konishi79739562009-11-12 23:56:43 +0900479{
480 static struct lock_class_key dat_lock_key;
481 struct inode *dat;
Ryusuke Konishi8908b2f2009-11-14 16:35:01 +0900482 struct nilfs_dat_info *di;
Ryusuke Konishi79739562009-11-12 23:56:43 +0900483 int err;
484
Ryusuke Konishi0ec060d2014-04-03 14:50:31 -0700485 if (entry_size > sb->s_blocksize) {
486 printk(KERN_ERR
487 "NILFS: too large DAT entry size: %zu bytes.\n",
488 entry_size);
489 return -EINVAL;
490 } else if (entry_size < NILFS_MIN_DAT_ENTRY_SIZE) {
491 printk(KERN_ERR
492 "NILFS: too small DAT entry size: %zu bytes.\n",
493 entry_size);
494 return -EINVAL;
495 }
496
Ryusuke Konishif1e89c82010-09-05 12:20:59 +0900497 dat = nilfs_iget_locked(sb, NULL, NILFS_DAT_INO);
498 if (unlikely(!dat))
499 return -ENOMEM;
500 if (!(dat->i_state & I_NEW))
501 goto out;
Ryusuke Konishi8908b2f2009-11-14 16:35:01 +0900502
Ryusuke Konishif1e89c82010-09-05 12:20:59 +0900503 err = nilfs_mdt_init(dat, NILFS_MDT_GFP, sizeof(*di));
504 if (err)
505 goto failed;
506
507 err = nilfs_palloc_init_blockgroup(dat, entry_size);
508 if (err)
509 goto failed;
510
511 di = NILFS_DAT_I(dat);
512 lockdep_set_class(&di->mi.mi_sem, &dat_lock_key);
513 nilfs_palloc_setup_cache(dat, &di->palloc_cache);
514 nilfs_mdt_setup_shadow_map(dat, &di->shadow);
515
516 err = nilfs_read_inode_common(dat, raw_inode);
517 if (err)
518 goto failed;
519
520 unlock_new_inode(dat);
521 out:
522 *inodep = dat;
523 return 0;
524 failed:
525 iget_failed(dat);
526 return err;
Ryusuke Konishi79739562009-11-12 23:56:43 +0900527}