blob: 8b5969538f39229cede14416a067d2e056c1a677 [file] [log] [blame]
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -07001/*
2 * inode.c - NILFS inode operations.
3 *
4 * Copyright (C) 2005-2008 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 Ryusuke Konishi <ryusuke@osrg.net>
21 *
22 */
23
24#include <linux/buffer_head.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090025#include <linux/gfp.h>
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -070026#include <linux/mpage.h>
Andreas Rohner56d7acc2014-09-25 16:05:14 -070027#include <linux/pagemap.h>
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -070028#include <linux/writeback.h>
Kent Overstreeta27bb332013-05-07 16:19:08 -070029#include <linux/aio.h>
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -070030#include "nilfs.h"
Al Viro6fd1e5c2010-06-07 11:55:00 -040031#include "btnode.h"
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -070032#include "segment.h"
33#include "page.h"
34#include "mdt.h"
35#include "cpfile.h"
36#include "ifile.h"
37
Vyacheslav Dubeykof5974c82012-07-30 14:42:10 -070038/**
39 * struct nilfs_iget_args - arguments used during comparison between inodes
40 * @ino: inode number
41 * @cno: checkpoint number
42 * @root: pointer on NILFS root object (mounted checkpoint)
43 * @for_gc: inode for GC flag
44 */
Ryusuke Konishi0e14a352010-08-20 21:20:29 +090045struct nilfs_iget_args {
46 u64 ino;
47 __u64 cno;
Ryusuke Konishi4d8d9292010-08-25 17:45:44 +090048 struct nilfs_root *root;
Ryusuke Konishi0e14a352010-08-20 21:20:29 +090049 int for_gc;
50};
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -070051
Ryusuke Konishi705304a2014-12-10 15:54:34 -080052static int nilfs_iget_test(struct inode *inode, void *opaque);
53
Ryusuke Konishibe667372011-03-05 00:19:32 +090054void nilfs_inode_add_blocks(struct inode *inode, int n)
55{
56 struct nilfs_root *root = NILFS_I(inode)->i_root;
57
58 inode_add_bytes(inode, (1 << inode->i_blkbits) * n);
59 if (root)
Vyacheslav Dubeykoe5f7f842013-07-03 15:08:06 -070060 atomic64_add(n, &root->blocks_count);
Ryusuke Konishibe667372011-03-05 00:19:32 +090061}
62
63void nilfs_inode_sub_blocks(struct inode *inode, int n)
64{
65 struct nilfs_root *root = NILFS_I(inode)->i_root;
66
67 inode_sub_bytes(inode, (1 << inode->i_blkbits) * n);
68 if (root)
Vyacheslav Dubeykoe5f7f842013-07-03 15:08:06 -070069 atomic64_sub(n, &root->blocks_count);
Ryusuke Konishibe667372011-03-05 00:19:32 +090070}
71
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -070072/**
73 * nilfs_get_block() - get a file block on the filesystem (callback function)
74 * @inode - inode struct of the target file
75 * @blkoff - file block number
76 * @bh_result - buffer head to be mapped on
77 * @create - indicate whether allocating the block or not when it has not
78 * been allocated yet.
79 *
80 * This function does not issue actual read request of the specified data
81 * block. It is done by VFS.
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -070082 */
83int nilfs_get_block(struct inode *inode, sector_t blkoff,
84 struct buffer_head *bh_result, int create)
85{
86 struct nilfs_inode_info *ii = NILFS_I(inode);
Ryusuke Konishi0ef28f92011-05-05 12:56:51 +090087 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
Ryusuke Konishic3a7abf2009-05-25 02:47:14 +090088 __u64 blknum = 0;
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -070089 int err = 0, ret;
Ryusuke Konishic3a7abf2009-05-25 02:47:14 +090090 unsigned maxblocks = bh_result->b_size >> inode->i_blkbits;
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -070091
Ryusuke Konishi0ef28f92011-05-05 12:56:51 +090092 down_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem);
Ryusuke Konishic3a7abf2009-05-25 02:47:14 +090093 ret = nilfs_bmap_lookup_contig(ii->i_bmap, blkoff, &blknum, maxblocks);
Ryusuke Konishi0ef28f92011-05-05 12:56:51 +090094 up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem);
Ryusuke Konishic3a7abf2009-05-25 02:47:14 +090095 if (ret >= 0) { /* found */
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -070096 map_bh(bh_result, inode->i_sb, blknum);
Ryusuke Konishic3a7abf2009-05-25 02:47:14 +090097 if (ret > 0)
98 bh_result->b_size = (ret << inode->i_blkbits);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -070099 goto out;
100 }
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700101 /* data block was not found */
102 if (ret == -ENOENT && create) {
103 struct nilfs_transaction_info ti;
104
105 bh_result->b_blocknr = 0;
106 err = nilfs_transaction_begin(inode->i_sb, &ti, 1);
107 if (unlikely(err))
108 goto out;
109 err = nilfs_bmap_insert(ii->i_bmap, (unsigned long)blkoff,
110 (unsigned long)bh_result);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700111 if (unlikely(err != 0)) {
112 if (err == -EEXIST) {
113 /*
114 * The get_block() function could be called
115 * from multiple callers for an inode.
116 * However, the page having this block must
117 * be locked in this case.
118 */
Ryusuke Konishi1f5abe72009-04-06 19:01:55 -0700119 printk(KERN_WARNING
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700120 "nilfs_get_block: a race condition "
121 "while inserting a data block. "
122 "(inode number=%lu, file block "
123 "offset=%llu)\n",
124 inode->i_ino,
125 (unsigned long long)blkoff);
Ryusuke Konishi1f5abe72009-04-06 19:01:55 -0700126 err = 0;
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700127 }
Ryusuke Konishi47420c72009-04-06 19:01:45 -0700128 nilfs_transaction_abort(inode->i_sb);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700129 goto out;
130 }
Andreas Rohnerb9f66142014-10-13 15:53:22 -0700131 nilfs_mark_inode_dirty_sync(inode);
Ryusuke Konishi47420c72009-04-06 19:01:45 -0700132 nilfs_transaction_commit(inode->i_sb); /* never fails */
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700133 /* Error handling should be detailed */
134 set_buffer_new(bh_result);
Ryusuke Konishi27e6c7a2010-12-26 16:28:28 +0900135 set_buffer_delay(bh_result);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700136 map_bh(bh_result, inode->i_sb, 0); /* dbn must be changed
137 to proper value */
138 } else if (ret == -ENOENT) {
139 /* not found is not error (e.g. hole); must return without
140 the mapped state flag. */
141 ;
142 } else {
143 err = ret;
144 }
145
146 out:
147 return err;
148}
149
150/**
151 * nilfs_readpage() - implement readpage() method of nilfs_aops {}
152 * address_space_operations.
153 * @file - file struct of the file to be read
154 * @page - the page to be read
155 */
156static int nilfs_readpage(struct file *file, struct page *page)
157{
158 return mpage_readpage(page, nilfs_get_block);
159}
160
161/**
162 * nilfs_readpages() - implement readpages() method of nilfs_aops {}
163 * address_space_operations.
164 * @file - file struct of the file to be read
165 * @mapping - address_space struct used for reading multiple pages
166 * @pages - the pages to be read
167 * @nr_pages - number of pages to be read
168 */
169static int nilfs_readpages(struct file *file, struct address_space *mapping,
170 struct list_head *pages, unsigned nr_pages)
171{
172 return mpage_readpages(mapping, pages, nr_pages, nilfs_get_block);
173}
174
175static int nilfs_writepages(struct address_space *mapping,
176 struct writeback_control *wbc)
177{
Ryusuke Konishif30bf3e2009-04-06 19:01:38 -0700178 struct inode *inode = mapping->host;
179 int err = 0;
180
Vyacheslav Dubeyko8c26c4e2013-04-30 15:27:48 -0700181 if (inode->i_sb->s_flags & MS_RDONLY) {
182 nilfs_clear_dirty_pages(mapping, false);
183 return -EROFS;
184 }
185
Ryusuke Konishif30bf3e2009-04-06 19:01:38 -0700186 if (wbc->sync_mode == WB_SYNC_ALL)
187 err = nilfs_construct_dsync_segment(inode->i_sb, inode,
188 wbc->range_start,
189 wbc->range_end);
190 return err;
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700191}
192
193static int nilfs_writepage(struct page *page, struct writeback_control *wbc)
194{
195 struct inode *inode = page->mapping->host;
196 int err;
197
Vyacheslav Dubeykoeb53b6d2013-04-30 15:27:51 -0700198 if (inode->i_sb->s_flags & MS_RDONLY) {
Vyacheslav Dubeyko8c26c4e2013-04-30 15:27:48 -0700199 /*
200 * It means that filesystem was remounted in read-only
201 * mode because of error or metadata corruption. But we
202 * have dirty pages that try to be flushed in background.
203 * So, here we simply discard this dirty page.
204 */
205 nilfs_clear_dirty_page(page, false);
206 unlock_page(page);
207 return -EROFS;
208 }
209
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700210 redirty_page_for_writepage(wbc, page);
211 unlock_page(page);
212
213 if (wbc->sync_mode == WB_SYNC_ALL) {
214 err = nilfs_construct_segment(inode->i_sb);
215 if (unlikely(err))
216 return err;
217 } else if (wbc->for_reclaim)
218 nilfs_flush_segment(inode->i_sb, inode->i_ino);
219
220 return 0;
221}
222
223static int nilfs_set_page_dirty(struct page *page)
224{
Andreas Rohner56d7acc2014-09-25 16:05:14 -0700225 struct inode *inode = page->mapping->host;
Ryusuke Konishi136e8772013-05-24 15:55:29 -0700226 int ret = __set_page_dirty_nobuffers(page);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700227
Ryusuke Konishi136e8772013-05-24 15:55:29 -0700228 if (page_has_buffers(page)) {
Ryusuke Konishi136e8772013-05-24 15:55:29 -0700229 unsigned nr_dirty = 0;
230 struct buffer_head *bh, *head;
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700231
Ryusuke Konishi136e8772013-05-24 15:55:29 -0700232 /*
233 * This page is locked by callers, and no other thread
234 * concurrently marks its buffers dirty since they are
235 * only dirtied through routines in fs/buffer.c in
236 * which call sites of mark_buffer_dirty are protected
237 * by page lock.
238 */
239 bh = head = page_buffers(page);
240 do {
241 /* Do not mark hole blocks dirty */
242 if (buffer_dirty(bh) || !buffer_mapped(bh))
243 continue;
244
245 set_buffer_dirty(bh);
246 nr_dirty++;
247 } while (bh = bh->b_this_page, bh != head);
248
249 if (nr_dirty)
250 nilfs_set_file_dirty(inode, nr_dirty);
Andreas Rohner56d7acc2014-09-25 16:05:14 -0700251 } else if (ret) {
252 unsigned nr_dirty = 1 << (PAGE_CACHE_SHIFT - inode->i_blkbits);
253
254 nilfs_set_file_dirty(inode, nr_dirty);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700255 }
256 return ret;
257}
258
Marco Stornelli2d1b3992012-12-15 11:57:37 +0100259void nilfs_write_failed(struct address_space *mapping, loff_t to)
260{
261 struct inode *inode = mapping->host;
262
263 if (to > inode->i_size) {
Kirill A. Shutemov7caef262013-09-12 15:13:56 -0700264 truncate_pagecache(inode, inode->i_size);
Marco Stornelli2d1b3992012-12-15 11:57:37 +0100265 nilfs_truncate(inode);
266 }
267}
268
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700269static int nilfs_write_begin(struct file *file, struct address_space *mapping,
270 loff_t pos, unsigned len, unsigned flags,
271 struct page **pagep, void **fsdata)
272
273{
274 struct inode *inode = mapping->host;
275 int err = nilfs_transaction_begin(inode->i_sb, NULL, 1);
276
277 if (unlikely(err))
278 return err;
279
Christoph Hellwig155130a2010-06-04 11:29:58 +0200280 err = block_write_begin(mapping, pos, len, flags, pagep,
281 nilfs_get_block);
282 if (unlikely(err)) {
Marco Stornelli2d1b3992012-12-15 11:57:37 +0100283 nilfs_write_failed(mapping, pos + len);
Ryusuke Konishi47420c72009-04-06 19:01:45 -0700284 nilfs_transaction_abort(inode->i_sb);
Christoph Hellwig155130a2010-06-04 11:29:58 +0200285 }
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700286 return err;
287}
288
289static int nilfs_write_end(struct file *file, struct address_space *mapping,
290 loff_t pos, unsigned len, unsigned copied,
291 struct page *page, void *fsdata)
292{
293 struct inode *inode = mapping->host;
294 unsigned start = pos & (PAGE_CACHE_SIZE - 1);
295 unsigned nr_dirty;
296 int err;
297
298 nr_dirty = nilfs_page_count_clean_buffers(page, start,
299 start + copied);
300 copied = generic_write_end(file, mapping, pos, len, copied, page,
301 fsdata);
Ryusuke Konishibcbc8c62010-12-27 00:05:49 +0900302 nilfs_set_file_dirty(inode, nr_dirty);
Ryusuke Konishi47420c72009-04-06 19:01:45 -0700303 err = nilfs_transaction_commit(inode->i_sb);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700304 return err ? : copied;
305}
306
307static ssize_t
Al Virod8d3d942014-03-04 21:27:34 -0500308nilfs_direct_IO(int rw, struct kiocb *iocb, struct iov_iter *iter,
309 loff_t offset)
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700310{
311 struct file *file = iocb->ki_filp;
Marco Stornelli2d1b3992012-12-15 11:57:37 +0100312 struct address_space *mapping = file->f_mapping;
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700313 struct inode *inode = file->f_mapping->host;
Al Viroa6cbcd42014-03-04 22:38:00 -0500314 size_t count = iov_iter_count(iter);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700315 ssize_t size;
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700316
317 if (rw == WRITE)
318 return 0;
319
320 /* Needs synchronization with the cleaner */
Al Viro31b14032014-03-05 01:33:16 -0500321 size = blockdev_direct_IO(rw, iocb, inode, iter, offset,
322 nilfs_get_block);
Christoph Hellwigeafdc7d2010-06-04 11:29:53 +0200323
324 /*
325 * In case of error extending write may have instantiated a few
326 * blocks outside i_size. Trim these off again.
327 */
328 if (unlikely((rw & WRITE) && size < 0)) {
329 loff_t isize = i_size_read(inode);
Al Viroa6cbcd42014-03-04 22:38:00 -0500330 loff_t end = offset + count;
Christoph Hellwigeafdc7d2010-06-04 11:29:53 +0200331
332 if (end > isize)
Marco Stornelli2d1b3992012-12-15 11:57:37 +0100333 nilfs_write_failed(mapping, end);
Christoph Hellwigeafdc7d2010-06-04 11:29:53 +0200334 }
335
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700336 return size;
337}
338
Alexey Dobriyan7f094102009-09-21 17:01:10 -0700339const struct address_space_operations nilfs_aops = {
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700340 .writepage = nilfs_writepage,
341 .readpage = nilfs_readpage,
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700342 .writepages = nilfs_writepages,
343 .set_page_dirty = nilfs_set_page_dirty,
344 .readpages = nilfs_readpages,
345 .write_begin = nilfs_write_begin,
346 .write_end = nilfs_write_end,
347 /* .releasepage = nilfs_releasepage, */
348 .invalidatepage = block_invalidatepage,
349 .direct_IO = nilfs_direct_IO,
Hisashi Hifumi258ef672009-05-13 11:19:40 +0900350 .is_partially_uptodate = block_is_partially_uptodate,
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700351};
352
Ryusuke Konishi705304a2014-12-10 15:54:34 -0800353static int nilfs_insert_inode_locked(struct inode *inode,
354 struct nilfs_root *root,
355 unsigned long ino)
356{
357 struct nilfs_iget_args args = {
358 .ino = ino, .root = root, .cno = 0, .for_gc = 0
359 };
360
361 return insert_inode_locked4(inode, ino, nilfs_iget_test, &args);
362}
363
Al Viroc6e49e32011-07-26 03:07:14 -0400364struct inode *nilfs_new_inode(struct inode *dir, umode_t mode)
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700365{
366 struct super_block *sb = dir->i_sb;
Ryusuke Konishie3154e92011-03-09 11:05:08 +0900367 struct the_nilfs *nilfs = sb->s_fs_info;
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700368 struct inode *inode;
369 struct nilfs_inode_info *ii;
Ryusuke Konishi4d8d9292010-08-25 17:45:44 +0900370 struct nilfs_root *root;
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700371 int err = -ENOMEM;
372 ino_t ino;
373
374 inode = new_inode(sb);
375 if (unlikely(!inode))
376 goto failed;
377
378 mapping_set_gfp_mask(inode->i_mapping,
379 mapping_gfp_mask(inode->i_mapping) & ~__GFP_FS);
380
Ryusuke Konishi4d8d9292010-08-25 17:45:44 +0900381 root = NILFS_I(dir)->i_root;
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700382 ii = NILFS_I(inode);
383 ii->i_state = 1 << NILFS_I_NEW;
Ryusuke Konishi4d8d9292010-08-25 17:45:44 +0900384 ii->i_root = root;
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700385
Ryusuke Konishie912a5b2010-08-14 13:07:15 +0900386 err = nilfs_ifile_create_inode(root->ifile, &ino, &ii->i_bh);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700387 if (unlikely(err))
388 goto failed_ifile_create_inode;
389 /* reference count of i_bh inherits from nilfs_mdt_read_block() */
390
Vyacheslav Dubeykoe5f7f842013-07-03 15:08:06 -0700391 atomic64_inc(&root->inodes_count);
Dmitry Monakhov73459dc2010-03-04 17:32:15 +0300392 inode_init_owner(inode, dir, mode);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700393 inode->i_ino = ino;
394 inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
395
396 if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) {
397 err = nilfs_bmap_read(ii->i_bmap, NULL);
398 if (err < 0)
Ryusuke Konishi705304a2014-12-10 15:54:34 -0800399 goto failed_after_creation;
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700400
401 set_bit(NILFS_I_BMAP, &ii->i_state);
402 /* No lock is needed; iget() ensures it. */
403 }
404
Ryusuke Konishib253a3e2011-01-20 02:09:53 +0900405 ii->i_flags = nilfs_mask_flags(
406 mode, NILFS_I(dir)->i_flags & NILFS_FL_INHERITED);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700407
408 /* ii->i_file_acl = 0; */
409 /* ii->i_dir_acl = 0; */
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700410 ii->i_dir_start_lookup = 0;
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700411 nilfs_set_inode_flags(inode);
Ryusuke Konishi9b1fc4e42011-03-09 11:05:08 +0900412 spin_lock(&nilfs->ns_next_gen_lock);
413 inode->i_generation = nilfs->ns_next_generation++;
414 spin_unlock(&nilfs->ns_next_gen_lock);
Ryusuke Konishi705304a2014-12-10 15:54:34 -0800415 if (nilfs_insert_inode_locked(inode, root, ino) < 0) {
416 err = -EIO;
417 goto failed_after_creation;
418 }
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700419
420 err = nilfs_init_acl(inode, dir);
421 if (unlikely(err))
Ryusuke Konishi705304a2014-12-10 15:54:34 -0800422 goto failed_after_creation; /* never occur. When supporting
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700423 nilfs_init_acl(), proper cancellation of
424 above jobs should be considered */
425
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700426 return inode;
427
Ryusuke Konishi705304a2014-12-10 15:54:34 -0800428 failed_after_creation:
Miklos Szeredi6d6b77f2011-10-28 14:13:28 +0200429 clear_nlink(inode);
Ryusuke Konishi705304a2014-12-10 15:54:34 -0800430 unlock_new_inode(inode);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700431 iput(inode); /* raw_inode will be deleted through
Ryusuke Konishi705304a2014-12-10 15:54:34 -0800432 nilfs_evict_inode() */
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700433 goto failed;
434
435 failed_ifile_create_inode:
436 make_bad_inode(inode);
437 iput(inode); /* if i_nlink == 1, generic_forget_inode() will be
438 called */
439 failed:
440 return ERR_PTR(err);
441}
442
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700443void nilfs_set_inode_flags(struct inode *inode)
444{
445 unsigned int flags = NILFS_I(inode)->i_flags;
446
447 inode->i_flags &= ~(S_SYNC | S_APPEND | S_IMMUTABLE | S_NOATIME |
448 S_DIRSYNC);
Ryusuke Konishif0c9f242011-01-20 02:09:52 +0900449 if (flags & FS_SYNC_FL)
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700450 inode->i_flags |= S_SYNC;
Ryusuke Konishif0c9f242011-01-20 02:09:52 +0900451 if (flags & FS_APPEND_FL)
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700452 inode->i_flags |= S_APPEND;
Ryusuke Konishif0c9f242011-01-20 02:09:52 +0900453 if (flags & FS_IMMUTABLE_FL)
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700454 inode->i_flags |= S_IMMUTABLE;
Ryusuke Konishif0c9f242011-01-20 02:09:52 +0900455 if (flags & FS_NOATIME_FL)
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700456 inode->i_flags |= S_NOATIME;
Ryusuke Konishif0c9f242011-01-20 02:09:52 +0900457 if (flags & FS_DIRSYNC_FL)
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700458 inode->i_flags |= S_DIRSYNC;
459 mapping_set_gfp_mask(inode->i_mapping,
460 mapping_gfp_mask(inode->i_mapping) & ~__GFP_FS);
461}
462
463int nilfs_read_inode_common(struct inode *inode,
464 struct nilfs_inode *raw_inode)
465{
466 struct nilfs_inode_info *ii = NILFS_I(inode);
467 int err;
468
469 inode->i_mode = le16_to_cpu(raw_inode->i_mode);
Eric W. Biederman305d3d02012-02-10 12:31:23 -0800470 i_uid_write(inode, le32_to_cpu(raw_inode->i_uid));
471 i_gid_write(inode, le32_to_cpu(raw_inode->i_gid));
Miklos Szeredibfe86842011-10-28 14:13:29 +0200472 set_nlink(inode, le16_to_cpu(raw_inode->i_links_count));
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700473 inode->i_size = le64_to_cpu(raw_inode->i_size);
474 inode->i_atime.tv_sec = le64_to_cpu(raw_inode->i_mtime);
475 inode->i_ctime.tv_sec = le64_to_cpu(raw_inode->i_ctime);
476 inode->i_mtime.tv_sec = le64_to_cpu(raw_inode->i_mtime);
Ryusuke Konishi61239232009-04-06 19:02:00 -0700477 inode->i_atime.tv_nsec = le32_to_cpu(raw_inode->i_mtime_nsec);
478 inode->i_ctime.tv_nsec = le32_to_cpu(raw_inode->i_ctime_nsec);
479 inode->i_mtime.tv_nsec = le32_to_cpu(raw_inode->i_mtime_nsec);
Ryusuke Konishi705304a2014-12-10 15:54:34 -0800480 if (inode->i_nlink == 0)
481 return -ESTALE; /* this inode is deleted */
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700482
483 inode->i_blocks = le64_to_cpu(raw_inode->i_blocks);
484 ii->i_flags = le32_to_cpu(raw_inode->i_flags);
485#if 0
486 ii->i_file_acl = le32_to_cpu(raw_inode->i_file_acl);
487 ii->i_dir_acl = S_ISREG(inode->i_mode) ?
488 0 : le32_to_cpu(raw_inode->i_dir_acl);
489#endif
Ryusuke Konishi3cc811b2009-09-28 13:02:46 +0900490 ii->i_dir_start_lookup = 0;
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700491 inode->i_generation = le32_to_cpu(raw_inode->i_generation);
492
493 if (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
494 S_ISLNK(inode->i_mode)) {
495 err = nilfs_bmap_read(ii->i_bmap, raw_inode);
496 if (err < 0)
497 return err;
498 set_bit(NILFS_I_BMAP, &ii->i_state);
499 /* No lock is needed; iget() ensures it. */
500 }
501 return 0;
502}
503
Ryusuke Konishie912a5b2010-08-14 13:07:15 +0900504static int __nilfs_read_inode(struct super_block *sb,
505 struct nilfs_root *root, unsigned long ino,
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700506 struct inode *inode)
507{
Ryusuke Konishie3154e92011-03-09 11:05:08 +0900508 struct the_nilfs *nilfs = sb->s_fs_info;
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700509 struct buffer_head *bh;
510 struct nilfs_inode *raw_inode;
511 int err;
512
Ryusuke Konishi365e2152010-12-27 00:07:30 +0900513 down_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem);
Ryusuke Konishie912a5b2010-08-14 13:07:15 +0900514 err = nilfs_ifile_get_inode_block(root->ifile, ino, &bh);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700515 if (unlikely(err))
516 goto bad_inode;
517
Ryusuke Konishie912a5b2010-08-14 13:07:15 +0900518 raw_inode = nilfs_ifile_map_inode(root->ifile, ino, bh);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700519
Ryusuke Konishi1b2f5a62009-08-22 19:10:07 +0900520 err = nilfs_read_inode_common(inode, raw_inode);
521 if (err)
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700522 goto failed_unmap;
523
524 if (S_ISREG(inode->i_mode)) {
525 inode->i_op = &nilfs_file_inode_operations;
526 inode->i_fop = &nilfs_file_operations;
527 inode->i_mapping->a_ops = &nilfs_aops;
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700528 } else if (S_ISDIR(inode->i_mode)) {
529 inode->i_op = &nilfs_dir_inode_operations;
530 inode->i_fop = &nilfs_dir_operations;
531 inode->i_mapping->a_ops = &nilfs_aops;
532 } else if (S_ISLNK(inode->i_mode)) {
533 inode->i_op = &nilfs_symlink_inode_operations;
534 inode->i_mapping->a_ops = &nilfs_aops;
535 } else {
536 inode->i_op = &nilfs_special_inode_operations;
537 init_special_inode(
538 inode, inode->i_mode,
Ryusuke Konishicdce2142010-05-09 15:31:22 +0900539 huge_decode_dev(le64_to_cpu(raw_inode->i_device_code)));
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700540 }
Ryusuke Konishie912a5b2010-08-14 13:07:15 +0900541 nilfs_ifile_unmap_inode(root->ifile, ino, bh);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700542 brelse(bh);
Ryusuke Konishi365e2152010-12-27 00:07:30 +0900543 up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700544 nilfs_set_inode_flags(inode);
545 return 0;
546
547 failed_unmap:
Ryusuke Konishie912a5b2010-08-14 13:07:15 +0900548 nilfs_ifile_unmap_inode(root->ifile, ino, bh);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700549 brelse(bh);
550
551 bad_inode:
Ryusuke Konishi365e2152010-12-27 00:07:30 +0900552 up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700553 return err;
554}
555
Ryusuke Konishi0e14a352010-08-20 21:20:29 +0900556static int nilfs_iget_test(struct inode *inode, void *opaque)
557{
558 struct nilfs_iget_args *args = opaque;
559 struct nilfs_inode_info *ii;
560
Ryusuke Konishi4d8d9292010-08-25 17:45:44 +0900561 if (args->ino != inode->i_ino || args->root != NILFS_I(inode)->i_root)
Ryusuke Konishi0e14a352010-08-20 21:20:29 +0900562 return 0;
563
564 ii = NILFS_I(inode);
565 if (!test_bit(NILFS_I_GCINODE, &ii->i_state))
566 return !args->for_gc;
567
568 return args->for_gc && args->cno == ii->i_cno;
569}
570
571static int nilfs_iget_set(struct inode *inode, void *opaque)
572{
573 struct nilfs_iget_args *args = opaque;
574
575 inode->i_ino = args->ino;
576 if (args->for_gc) {
577 NILFS_I(inode)->i_state = 1 << NILFS_I_GCINODE;
578 NILFS_I(inode)->i_cno = args->cno;
Ryusuke Konishi4d8d9292010-08-25 17:45:44 +0900579 NILFS_I(inode)->i_root = NULL;
580 } else {
581 if (args->root && args->ino == NILFS_ROOT_INO)
582 nilfs_get_root(args->root);
583 NILFS_I(inode)->i_root = args->root;
Ryusuke Konishi0e14a352010-08-20 21:20:29 +0900584 }
585 return 0;
586}
587
Ryusuke Konishi032dbb32010-09-13 11:16:34 +0900588struct inode *nilfs_ilookup(struct super_block *sb, struct nilfs_root *root,
589 unsigned long ino)
590{
591 struct nilfs_iget_args args = {
592 .ino = ino, .root = root, .cno = 0, .for_gc = 0
593 };
594
595 return ilookup5(sb, ino, nilfs_iget_test, &args);
596}
597
Ryusuke Konishif1e89c82010-09-05 12:20:59 +0900598struct inode *nilfs_iget_locked(struct super_block *sb, struct nilfs_root *root,
599 unsigned long ino)
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700600{
Ryusuke Konishi4d8d9292010-08-25 17:45:44 +0900601 struct nilfs_iget_args args = {
602 .ino = ino, .root = root, .cno = 0, .for_gc = 0
603 };
Ryusuke Konishif1e89c82010-09-05 12:20:59 +0900604
605 return iget5_locked(sb, ino, nilfs_iget_test, nilfs_iget_set, &args);
606}
607
608struct inode *nilfs_iget(struct super_block *sb, struct nilfs_root *root,
609 unsigned long ino)
610{
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700611 struct inode *inode;
612 int err;
613
Ryusuke Konishif1e89c82010-09-05 12:20:59 +0900614 inode = nilfs_iget_locked(sb, root, ino);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700615 if (unlikely(!inode))
616 return ERR_PTR(-ENOMEM);
617 if (!(inode->i_state & I_NEW))
618 return inode;
619
Ryusuke Konishie912a5b2010-08-14 13:07:15 +0900620 err = __nilfs_read_inode(sb, root, ino, inode);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700621 if (unlikely(err)) {
622 iget_failed(inode);
623 return ERR_PTR(err);
624 }
625 unlock_new_inode(inode);
626 return inode;
627}
628
Ryusuke Konishi263d90c2010-08-20 19:06:11 +0900629struct inode *nilfs_iget_for_gc(struct super_block *sb, unsigned long ino,
630 __u64 cno)
631{
Ryusuke Konishi4d8d9292010-08-25 17:45:44 +0900632 struct nilfs_iget_args args = {
633 .ino = ino, .root = NULL, .cno = cno, .for_gc = 1
634 };
Ryusuke Konishi263d90c2010-08-20 19:06:11 +0900635 struct inode *inode;
636 int err;
637
638 inode = iget5_locked(sb, ino, nilfs_iget_test, nilfs_iget_set, &args);
639 if (unlikely(!inode))
640 return ERR_PTR(-ENOMEM);
641 if (!(inode->i_state & I_NEW))
642 return inode;
643
644 err = nilfs_init_gcinode(inode);
645 if (unlikely(err)) {
646 iget_failed(inode);
647 return ERR_PTR(err);
648 }
649 unlock_new_inode(inode);
650 return inode;
651}
652
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700653void nilfs_write_inode_common(struct inode *inode,
654 struct nilfs_inode *raw_inode, int has_bmap)
655{
656 struct nilfs_inode_info *ii = NILFS_I(inode);
657
658 raw_inode->i_mode = cpu_to_le16(inode->i_mode);
Eric W. Biederman305d3d02012-02-10 12:31:23 -0800659 raw_inode->i_uid = cpu_to_le32(i_uid_read(inode));
660 raw_inode->i_gid = cpu_to_le32(i_gid_read(inode));
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700661 raw_inode->i_links_count = cpu_to_le16(inode->i_nlink);
662 raw_inode->i_size = cpu_to_le64(inode->i_size);
663 raw_inode->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
664 raw_inode->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec);
Ryusuke Konishi61239232009-04-06 19:02:00 -0700665 raw_inode->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
666 raw_inode->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700667 raw_inode->i_blocks = cpu_to_le64(inode->i_blocks);
668
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700669 raw_inode->i_flags = cpu_to_le32(ii->i_flags);
670 raw_inode->i_generation = cpu_to_le32(inode->i_generation);
671
Ryusuke Konishi56eb5532011-04-30 18:56:12 +0900672 if (NILFS_ROOT_METADATA_FILE(inode->i_ino)) {
673 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
674
675 /* zero-fill unused portion in the case of super root block */
676 raw_inode->i_xattr = 0;
677 raw_inode->i_pad = 0;
678 memset((void *)raw_inode + sizeof(*raw_inode), 0,
679 nilfs->ns_inode_size - sizeof(*raw_inode));
680 }
681
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700682 if (has_bmap)
683 nilfs_bmap_write(ii->i_bmap, raw_inode);
684 else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
685 raw_inode->i_device_code =
Ryusuke Konishicdce2142010-05-09 15:31:22 +0900686 cpu_to_le64(huge_encode_dev(inode->i_rdev));
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700687 /* When extending inode, nilfs->ns_inode_size should be checked
688 for substitutions of appended fields */
689}
690
Andreas Rohnerb9f66142014-10-13 15:53:22 -0700691void nilfs_update_inode(struct inode *inode, struct buffer_head *ibh, int flags)
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700692{
693 ino_t ino = inode->i_ino;
694 struct nilfs_inode_info *ii = NILFS_I(inode);
Ryusuke Konishie912a5b2010-08-14 13:07:15 +0900695 struct inode *ifile = ii->i_root->ifile;
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700696 struct nilfs_inode *raw_inode;
697
Ryusuke Konishie912a5b2010-08-14 13:07:15 +0900698 raw_inode = nilfs_ifile_map_inode(ifile, ino, ibh);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700699
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700700 if (test_and_clear_bit(NILFS_I_NEW, &ii->i_state))
Ryusuke Konishie912a5b2010-08-14 13:07:15 +0900701 memset(raw_inode, 0, NILFS_MDT(ifile)->mi_entry_size);
Andreas Rohnerb9f66142014-10-13 15:53:22 -0700702 if (flags & I_DIRTY_DATASYNC)
703 set_bit(NILFS_I_INODE_SYNC, &ii->i_state);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700704
705 nilfs_write_inode_common(inode, raw_inode, 0);
706 /* XXX: call with has_bmap = 0 is a workaround to avoid
707 deadlock of bmap. This delays update of i_bmap to just
708 before writing */
Ryusuke Konishie912a5b2010-08-14 13:07:15 +0900709 nilfs_ifile_unmap_inode(ifile, ino, ibh);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700710}
711
712#define NILFS_MAX_TRUNCATE_BLOCKS 16384 /* 64MB for 4KB block */
713
714static void nilfs_truncate_bmap(struct nilfs_inode_info *ii,
715 unsigned long from)
716{
717 unsigned long b;
718 int ret;
719
720 if (!test_bit(NILFS_I_BMAP, &ii->i_state))
721 return;
Ryusuke Konishie8289492010-11-19 15:26:20 +0900722repeat:
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700723 ret = nilfs_bmap_last_key(ii->i_bmap, &b);
724 if (ret == -ENOENT)
725 return;
726 else if (ret < 0)
727 goto failed;
728
729 if (b < from)
730 return;
731
732 b -= min_t(unsigned long, NILFS_MAX_TRUNCATE_BLOCKS, b - from);
733 ret = nilfs_bmap_truncate(ii->i_bmap, b);
734 nilfs_relax_pressure_in_lock(ii->vfs_inode.i_sb);
735 if (!ret || (ret == -ENOMEM &&
736 nilfs_bmap_truncate(ii->i_bmap, b) == 0))
737 goto repeat;
738
Ryusuke Konishie8289492010-11-19 15:26:20 +0900739failed:
740 nilfs_warning(ii->vfs_inode.i_sb, __func__,
741 "failed to truncate bmap (ino=%lu, err=%d)",
742 ii->vfs_inode.i_ino, ret);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700743}
744
745void nilfs_truncate(struct inode *inode)
746{
747 unsigned long blkoff;
748 unsigned int blocksize;
749 struct nilfs_transaction_info ti;
750 struct super_block *sb = inode->i_sb;
751 struct nilfs_inode_info *ii = NILFS_I(inode);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700752
753 if (!test_bit(NILFS_I_BMAP, &ii->i_state))
754 return;
755 if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
756 return;
757
758 blocksize = sb->s_blocksize;
759 blkoff = (inode->i_size + blocksize - 1) >> sb->s_blocksize_bits;
Ryusuke Konishi1f5abe72009-04-06 19:01:55 -0700760 nilfs_transaction_begin(sb, &ti, 0); /* never fails */
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700761
762 block_truncate_page(inode->i_mapping, inode->i_size, nilfs_get_block);
763
764 nilfs_truncate_bmap(ii, blkoff);
765
766 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
767 if (IS_SYNC(inode))
768 nilfs_set_transaction_flag(NILFS_TI_SYNC);
769
Jiro SEKIBAabdb3182009-11-27 19:41:14 +0900770 nilfs_mark_inode_dirty(inode);
Ryusuke Konishibcbc8c62010-12-27 00:05:49 +0900771 nilfs_set_file_dirty(inode, 0);
Ryusuke Konishi47420c72009-04-06 19:01:45 -0700772 nilfs_transaction_commit(sb);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700773 /* May construct a logical segment and may fail in sync mode.
774 But truncate has no return value. */
775}
776
Al Viro6fd1e5c2010-06-07 11:55:00 -0400777static void nilfs_clear_inode(struct inode *inode)
778{
779 struct nilfs_inode_info *ii = NILFS_I(inode);
Ryusuke Konishi518d1a62010-08-20 23:40:54 +0900780 struct nilfs_mdt_info *mdi = NILFS_MDT(inode);
Al Viro6fd1e5c2010-06-07 11:55:00 -0400781
782 /*
783 * Free resources allocated in nilfs_read_inode(), here.
784 */
785 BUG_ON(!list_empty(&ii->i_dirty));
786 brelse(ii->i_bh);
787 ii->i_bh = NULL;
788
Ryusuke Konishi518d1a62010-08-20 23:40:54 +0900789 if (mdi && mdi->mi_palloc_cache)
790 nilfs_palloc_destroy_cache(inode);
791
Al Viro6fd1e5c2010-06-07 11:55:00 -0400792 if (test_bit(NILFS_I_BMAP, &ii->i_state))
793 nilfs_bmap_clear(ii->i_bmap);
794
795 nilfs_btnode_cache_clear(&ii->i_btnode_cache);
Ryusuke Konishi4d8d9292010-08-25 17:45:44 +0900796
797 if (ii->i_root && inode->i_ino == NILFS_ROOT_INO)
798 nilfs_put_root(ii->i_root);
Al Viro6fd1e5c2010-06-07 11:55:00 -0400799}
800
801void nilfs_evict_inode(struct inode *inode)
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700802{
803 struct nilfs_transaction_info ti;
804 struct super_block *sb = inode->i_sb;
805 struct nilfs_inode_info *ii = NILFS_I(inode);
Ryusuke Konishi25b18d32011-02-11 15:23:27 +0900806 int ret;
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700807
Ryusuke Konishi4d8d9292010-08-25 17:45:44 +0900808 if (inode->i_nlink || !ii->i_root || unlikely(is_bad_inode(inode))) {
Johannes Weiner91b0abe2014-04-03 14:47:49 -0700809 truncate_inode_pages_final(&inode->i_data);
Jan Karadbd57682012-05-03 14:48:02 +0200810 clear_inode(inode);
Al Viro6fd1e5c2010-06-07 11:55:00 -0400811 nilfs_clear_inode(inode);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700812 return;
813 }
Ryusuke Konishi1f5abe72009-04-06 19:01:55 -0700814 nilfs_transaction_begin(sb, &ti, 0); /* never fails */
815
Johannes Weiner91b0abe2014-04-03 14:47:49 -0700816 truncate_inode_pages_final(&inode->i_data);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700817
Ryusuke Konishie912a5b2010-08-14 13:07:15 +0900818 /* TODO: some of the following operations may fail. */
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700819 nilfs_truncate_bmap(ii, 0);
Jiro SEKIBAabdb3182009-11-27 19:41:14 +0900820 nilfs_mark_inode_dirty(inode);
Jan Karadbd57682012-05-03 14:48:02 +0200821 clear_inode(inode);
Ryusuke Konishie912a5b2010-08-14 13:07:15 +0900822
Ryusuke Konishi25b18d32011-02-11 15:23:27 +0900823 ret = nilfs_ifile_delete_inode(ii->i_root->ifile, inode->i_ino);
824 if (!ret)
Vyacheslav Dubeykoe5f7f842013-07-03 15:08:06 -0700825 atomic64_dec(&ii->i_root->inodes_count);
Ryusuke Konishie912a5b2010-08-14 13:07:15 +0900826
Al Viro6fd1e5c2010-06-07 11:55:00 -0400827 nilfs_clear_inode(inode);
Ryusuke Konishie912a5b2010-08-14 13:07:15 +0900828
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700829 if (IS_SYNC(inode))
830 nilfs_set_transaction_flag(NILFS_TI_SYNC);
Ryusuke Konishi47420c72009-04-06 19:01:45 -0700831 nilfs_transaction_commit(sb);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700832 /* May construct a logical segment and may fail in sync mode.
833 But delete_inode has no return value. */
834}
835
836int nilfs_setattr(struct dentry *dentry, struct iattr *iattr)
837{
838 struct nilfs_transaction_info ti;
839 struct inode *inode = dentry->d_inode;
840 struct super_block *sb = inode->i_sb;
Ryusuke Konishi47420c72009-04-06 19:01:45 -0700841 int err;
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700842
843 err = inode_change_ok(inode, iattr);
844 if (err)
845 return err;
846
847 err = nilfs_transaction_begin(sb, &ti, 0);
848 if (unlikely(err))
849 return err;
Ryusuke Konishi47420c72009-04-06 19:01:45 -0700850
Christoph Hellwig10257742010-06-04 11:30:02 +0200851 if ((iattr->ia_valid & ATTR_SIZE) &&
852 iattr->ia_size != i_size_read(inode)) {
Christoph Hellwig562c72a2011-06-24 14:29:45 -0400853 inode_dio_wait(inode);
Marco Stornelli2d1b3992012-12-15 11:57:37 +0100854 truncate_setsize(inode, iattr->ia_size);
855 nilfs_truncate(inode);
Christoph Hellwig10257742010-06-04 11:30:02 +0200856 }
857
858 setattr_copy(inode, iattr);
859 mark_inode_dirty(inode);
860
861 if (iattr->ia_valid & ATTR_MODE) {
862 err = nilfs_acl_chmod(inode);
863 if (unlikely(err))
864 goto out_err;
865 }
866
867 return nilfs_transaction_commit(sb);
868
869out_err:
870 nilfs_transaction_abort(sb);
Ryusuke Konishi47420c72009-04-06 19:01:45 -0700871 return err;
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700872}
873
Al Viro10556cb2011-06-20 19:28:19 -0400874int nilfs_permission(struct inode *inode, int mask)
Ryusuke Konishidc3d3b82010-08-15 23:33:57 +0900875{
Al Viro730e9082011-06-18 20:21:44 -0400876 struct nilfs_root *root = NILFS_I(inode)->i_root;
Ryusuke Konishidc3d3b82010-08-15 23:33:57 +0900877 if ((mask & MAY_WRITE) && root &&
878 root->cno != NILFS_CPTREE_CURRENT_CNO)
879 return -EROFS; /* snapshot is not writable */
880
Al Viro2830ba72011-06-20 19:16:29 -0400881 return generic_permission(inode, mask);
Ryusuke Konishidc3d3b82010-08-15 23:33:57 +0900882}
883
Ryusuke Konishibcbc8c62010-12-27 00:05:49 +0900884int nilfs_load_inode_block(struct inode *inode, struct buffer_head **pbh)
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700885{
Ryusuke Konishie3154e92011-03-09 11:05:08 +0900886 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700887 struct nilfs_inode_info *ii = NILFS_I(inode);
888 int err;
889
Ryusuke Konishi693dd322011-03-09 11:05:07 +0900890 spin_lock(&nilfs->ns_inode_lock);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700891 if (ii->i_bh == NULL) {
Ryusuke Konishi693dd322011-03-09 11:05:07 +0900892 spin_unlock(&nilfs->ns_inode_lock);
Ryusuke Konishie912a5b2010-08-14 13:07:15 +0900893 err = nilfs_ifile_get_inode_block(ii->i_root->ifile,
894 inode->i_ino, pbh);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700895 if (unlikely(err))
896 return err;
Ryusuke Konishi693dd322011-03-09 11:05:07 +0900897 spin_lock(&nilfs->ns_inode_lock);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700898 if (ii->i_bh == NULL)
899 ii->i_bh = *pbh;
900 else {
901 brelse(*pbh);
902 *pbh = ii->i_bh;
903 }
904 } else
905 *pbh = ii->i_bh;
906
907 get_bh(*pbh);
Ryusuke Konishi693dd322011-03-09 11:05:07 +0900908 spin_unlock(&nilfs->ns_inode_lock);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700909 return 0;
910}
911
912int nilfs_inode_dirty(struct inode *inode)
913{
914 struct nilfs_inode_info *ii = NILFS_I(inode);
Ryusuke Konishie3154e92011-03-09 11:05:08 +0900915 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700916 int ret = 0;
917
918 if (!list_empty(&ii->i_dirty)) {
Ryusuke Konishi693dd322011-03-09 11:05:07 +0900919 spin_lock(&nilfs->ns_inode_lock);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700920 ret = test_bit(NILFS_I_DIRTY, &ii->i_state) ||
921 test_bit(NILFS_I_BUSY, &ii->i_state);
Ryusuke Konishi693dd322011-03-09 11:05:07 +0900922 spin_unlock(&nilfs->ns_inode_lock);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700923 }
924 return ret;
925}
926
Ryusuke Konishibcbc8c62010-12-27 00:05:49 +0900927int nilfs_set_file_dirty(struct inode *inode, unsigned nr_dirty)
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700928{
929 struct nilfs_inode_info *ii = NILFS_I(inode);
Ryusuke Konishie3154e92011-03-09 11:05:08 +0900930 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700931
Ryusuke Konishi693dd322011-03-09 11:05:07 +0900932 atomic_add(nr_dirty, &nilfs->ns_ndirtyblks);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700933
Ryusuke Konishi458c5b02009-04-06 19:01:56 -0700934 if (test_and_set_bit(NILFS_I_DIRTY, &ii->i_state))
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700935 return 0;
936
Ryusuke Konishi693dd322011-03-09 11:05:07 +0900937 spin_lock(&nilfs->ns_inode_lock);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700938 if (!test_bit(NILFS_I_QUEUED, &ii->i_state) &&
939 !test_bit(NILFS_I_BUSY, &ii->i_state)) {
940 /* Because this routine may race with nilfs_dispose_list(),
941 we have to check NILFS_I_QUEUED here, too. */
942 if (list_empty(&ii->i_dirty) && igrab(inode) == NULL) {
943 /* This will happen when somebody is freeing
944 this inode. */
Ryusuke Konishi693dd322011-03-09 11:05:07 +0900945 nilfs_warning(inode->i_sb, __func__,
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700946 "cannot get inode (ino=%lu)\n",
947 inode->i_ino);
Ryusuke Konishi693dd322011-03-09 11:05:07 +0900948 spin_unlock(&nilfs->ns_inode_lock);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700949 return -EINVAL; /* NILFS_I_DIRTY may remain for
950 freeing inode */
951 }
Nicolas Kaisereaae0f32011-03-19 16:45:30 +0100952 list_move_tail(&ii->i_dirty, &nilfs->ns_dirty_files);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700953 set_bit(NILFS_I_QUEUED, &ii->i_state);
954 }
Ryusuke Konishi693dd322011-03-09 11:05:07 +0900955 spin_unlock(&nilfs->ns_inode_lock);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700956 return 0;
957}
958
Andreas Rohnerb9f66142014-10-13 15:53:22 -0700959int __nilfs_mark_inode_dirty(struct inode *inode, int flags)
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700960{
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700961 struct buffer_head *ibh;
962 int err;
963
Ryusuke Konishibcbc8c62010-12-27 00:05:49 +0900964 err = nilfs_load_inode_block(inode, &ibh);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700965 if (unlikely(err)) {
966 nilfs_warning(inode->i_sb, __func__,
967 "failed to reget inode block.\n");
968 return err;
969 }
Andreas Rohnerb9f66142014-10-13 15:53:22 -0700970 nilfs_update_inode(inode, ibh, flags);
Ryusuke Konishi5fc7b142011-05-05 12:56:51 +0900971 mark_buffer_dirty(ibh);
Ryusuke Konishie912a5b2010-08-14 13:07:15 +0900972 nilfs_mdt_mark_dirty(NILFS_I(inode)->i_root->ifile);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700973 brelse(ibh);
974 return 0;
975}
976
977/**
978 * nilfs_dirty_inode - reflect changes on given inode to an inode block.
979 * @inode: inode of the file to be registered.
980 *
981 * nilfs_dirty_inode() loads a inode block containing the specified
982 * @inode and copies data from a nilfs_inode to a corresponding inode
983 * entry in the inode block. This operation is excluded from the segment
984 * construction. This function can be called both as a single operation
985 * and as a part of indivisible file operations.
986 */
Christoph Hellwigaa385722011-05-27 06:53:02 -0400987void nilfs_dirty_inode(struct inode *inode, int flags)
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700988{
989 struct nilfs_transaction_info ti;
Ryusuke Konishi7d6cd922010-08-21 00:30:39 +0900990 struct nilfs_mdt_info *mdi = NILFS_MDT(inode);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700991
992 if (is_bad_inode(inode)) {
993 nilfs_warning(inode->i_sb, __func__,
994 "tried to mark bad_inode dirty. ignored.\n");
995 dump_stack();
996 return;
997 }
Ryusuke Konishi7d6cd922010-08-21 00:30:39 +0900998 if (mdi) {
999 nilfs_mdt_mark_dirty(inode);
1000 return;
1001 }
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -07001002 nilfs_transaction_begin(inode->i_sb, &ti, 0);
Andreas Rohnerb9f66142014-10-13 15:53:22 -07001003 __nilfs_mark_inode_dirty(inode, flags);
Ryusuke Konishi47420c72009-04-06 19:01:45 -07001004 nilfs_transaction_commit(inode->i_sb); /* never fails */
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -07001005}
Ryusuke Konishi622daaff2010-12-26 16:38:43 +09001006
1007int nilfs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
1008 __u64 start, __u64 len)
1009{
Ryusuke Konishi0ef28f92011-05-05 12:56:51 +09001010 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
Ryusuke Konishi622daaff2010-12-26 16:38:43 +09001011 __u64 logical = 0, phys = 0, size = 0;
1012 __u32 flags = 0;
1013 loff_t isize;
1014 sector_t blkoff, end_blkoff;
1015 sector_t delalloc_blkoff;
1016 unsigned long delalloc_blklen;
1017 unsigned int blkbits = inode->i_blkbits;
1018 int ret, n;
1019
1020 ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC);
1021 if (ret)
1022 return ret;
1023
1024 mutex_lock(&inode->i_mutex);
1025
1026 isize = i_size_read(inode);
1027
1028 blkoff = start >> blkbits;
1029 end_blkoff = (start + len - 1) >> blkbits;
1030
1031 delalloc_blklen = nilfs_find_uncommitted_extent(inode, blkoff,
1032 &delalloc_blkoff);
1033
1034 do {
1035 __u64 blkphy;
1036 unsigned int maxblocks;
1037
1038 if (delalloc_blklen && blkoff == delalloc_blkoff) {
1039 if (size) {
1040 /* End of the current extent */
1041 ret = fiemap_fill_next_extent(
1042 fieinfo, logical, phys, size, flags);
1043 if (ret)
1044 break;
1045 }
1046 if (blkoff > end_blkoff)
1047 break;
1048
1049 flags = FIEMAP_EXTENT_MERGED | FIEMAP_EXTENT_DELALLOC;
1050 logical = blkoff << blkbits;
1051 phys = 0;
1052 size = delalloc_blklen << blkbits;
1053
1054 blkoff = delalloc_blkoff + delalloc_blklen;
1055 delalloc_blklen = nilfs_find_uncommitted_extent(
1056 inode, blkoff, &delalloc_blkoff);
1057 continue;
1058 }
1059
1060 /*
1061 * Limit the number of blocks that we look up so as
1062 * not to get into the next delayed allocation extent.
1063 */
1064 maxblocks = INT_MAX;
1065 if (delalloc_blklen)
1066 maxblocks = min_t(sector_t, delalloc_blkoff - blkoff,
1067 maxblocks);
1068 blkphy = 0;
1069
1070 down_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem);
1071 n = nilfs_bmap_lookup_contig(
1072 NILFS_I(inode)->i_bmap, blkoff, &blkphy, maxblocks);
1073 up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem);
1074
1075 if (n < 0) {
1076 int past_eof;
1077
1078 if (unlikely(n != -ENOENT))
1079 break; /* error */
1080
1081 /* HOLE */
1082 blkoff++;
1083 past_eof = ((blkoff << blkbits) >= isize);
1084
1085 if (size) {
1086 /* End of the current extent */
1087
1088 if (past_eof)
1089 flags |= FIEMAP_EXTENT_LAST;
1090
1091 ret = fiemap_fill_next_extent(
1092 fieinfo, logical, phys, size, flags);
1093 if (ret)
1094 break;
1095 size = 0;
1096 }
1097 if (blkoff > end_blkoff || past_eof)
1098 break;
1099 } else {
1100 if (size) {
1101 if (phys && blkphy << blkbits == phys + size) {
1102 /* The current extent goes on */
1103 size += n << blkbits;
1104 } else {
1105 /* Terminate the current extent */
1106 ret = fiemap_fill_next_extent(
1107 fieinfo, logical, phys, size,
1108 flags);
1109 if (ret || blkoff > end_blkoff)
1110 break;
1111
1112 /* Start another extent */
1113 flags = FIEMAP_EXTENT_MERGED;
1114 logical = blkoff << blkbits;
1115 phys = blkphy << blkbits;
1116 size = n << blkbits;
1117 }
1118 } else {
1119 /* Start a new extent */
1120 flags = FIEMAP_EXTENT_MERGED;
1121 logical = blkoff << blkbits;
1122 phys = blkphy << blkbits;
1123 size = n << blkbits;
1124 }
1125 blkoff += n;
1126 }
1127 cond_resched();
1128 } while (true);
1129
1130 /* If ret is 1 then we just hit the end of the extent array */
1131 if (ret == 1)
1132 ret = 0;
1133
1134 mutex_unlock(&inode->i_mutex);
1135 return ret;
1136}