blob: ac2f64943ff4c257f3fe2cd8d32de581de601cc6 [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>
Christoph Hellwige2e40f22015-02-22 08:58:50 -080029#include <linux/uio.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;
Ryusuke Konishi3568a132015-04-16 12:46:34 -0700109 err = nilfs_bmap_insert(ii->i_bmap, blkoff,
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700110 (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
Omar Sandoval22c61862015-03-16 04:33:53 -0700308nilfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter, loff_t offset)
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700309{
Al Viro6b6dabc2015-06-21 01:37:24 -0400310 struct inode *inode = file_inode(iocb->ki_filp);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700311
Omar Sandoval6f673762015-03-16 04:33:52 -0700312 if (iov_iter_rw(iter) == WRITE)
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700313 return 0;
314
315 /* Needs synchronization with the cleaner */
Al Viro6b6dabc2015-06-21 01:37:24 -0400316 return blockdev_direct_IO(iocb, inode, iter, offset, nilfs_get_block);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700317}
318
Alexey Dobriyan7f094102009-09-21 17:01:10 -0700319const struct address_space_operations nilfs_aops = {
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700320 .writepage = nilfs_writepage,
321 .readpage = nilfs_readpage,
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700322 .writepages = nilfs_writepages,
323 .set_page_dirty = nilfs_set_page_dirty,
324 .readpages = nilfs_readpages,
325 .write_begin = nilfs_write_begin,
326 .write_end = nilfs_write_end,
327 /* .releasepage = nilfs_releasepage, */
328 .invalidatepage = block_invalidatepage,
329 .direct_IO = nilfs_direct_IO,
Hisashi Hifumi258ef672009-05-13 11:19:40 +0900330 .is_partially_uptodate = block_is_partially_uptodate,
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700331};
332
Ryusuke Konishi705304a2014-12-10 15:54:34 -0800333static int nilfs_insert_inode_locked(struct inode *inode,
334 struct nilfs_root *root,
335 unsigned long ino)
336{
337 struct nilfs_iget_args args = {
338 .ino = ino, .root = root, .cno = 0, .for_gc = 0
339 };
340
341 return insert_inode_locked4(inode, ino, nilfs_iget_test, &args);
342}
343
Al Viroc6e49e32011-07-26 03:07:14 -0400344struct inode *nilfs_new_inode(struct inode *dir, umode_t mode)
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700345{
346 struct super_block *sb = dir->i_sb;
Ryusuke Konishie3154e92011-03-09 11:05:08 +0900347 struct the_nilfs *nilfs = sb->s_fs_info;
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700348 struct inode *inode;
349 struct nilfs_inode_info *ii;
Ryusuke Konishi4d8d9292010-08-25 17:45:44 +0900350 struct nilfs_root *root;
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700351 int err = -ENOMEM;
352 ino_t ino;
353
354 inode = new_inode(sb);
355 if (unlikely(!inode))
356 goto failed;
357
358 mapping_set_gfp_mask(inode->i_mapping,
Michal Hockoc62d2552015-11-06 16:28:49 -0800359 mapping_gfp_constraint(inode->i_mapping, ~__GFP_FS));
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700360
Ryusuke Konishi4d8d9292010-08-25 17:45:44 +0900361 root = NILFS_I(dir)->i_root;
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700362 ii = NILFS_I(inode);
363 ii->i_state = 1 << NILFS_I_NEW;
Ryusuke Konishi4d8d9292010-08-25 17:45:44 +0900364 ii->i_root = root;
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700365
Ryusuke Konishie912a5b2010-08-14 13:07:15 +0900366 err = nilfs_ifile_create_inode(root->ifile, &ino, &ii->i_bh);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700367 if (unlikely(err))
368 goto failed_ifile_create_inode;
369 /* reference count of i_bh inherits from nilfs_mdt_read_block() */
370
Vyacheslav Dubeykoe5f7f842013-07-03 15:08:06 -0700371 atomic64_inc(&root->inodes_count);
Dmitry Monakhov73459dc2010-03-04 17:32:15 +0300372 inode_init_owner(inode, dir, mode);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700373 inode->i_ino = ino;
374 inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
375
376 if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) {
377 err = nilfs_bmap_read(ii->i_bmap, NULL);
378 if (err < 0)
Ryusuke Konishi705304a2014-12-10 15:54:34 -0800379 goto failed_after_creation;
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700380
381 set_bit(NILFS_I_BMAP, &ii->i_state);
382 /* No lock is needed; iget() ensures it. */
383 }
384
Ryusuke Konishib253a3e2011-01-20 02:09:53 +0900385 ii->i_flags = nilfs_mask_flags(
386 mode, NILFS_I(dir)->i_flags & NILFS_FL_INHERITED);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700387
388 /* ii->i_file_acl = 0; */
389 /* ii->i_dir_acl = 0; */
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700390 ii->i_dir_start_lookup = 0;
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700391 nilfs_set_inode_flags(inode);
Ryusuke Konishi9b1fc4e42011-03-09 11:05:08 +0900392 spin_lock(&nilfs->ns_next_gen_lock);
393 inode->i_generation = nilfs->ns_next_generation++;
394 spin_unlock(&nilfs->ns_next_gen_lock);
Ryusuke Konishi705304a2014-12-10 15:54:34 -0800395 if (nilfs_insert_inode_locked(inode, root, ino) < 0) {
396 err = -EIO;
397 goto failed_after_creation;
398 }
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700399
400 err = nilfs_init_acl(inode, dir);
401 if (unlikely(err))
Ryusuke Konishi705304a2014-12-10 15:54:34 -0800402 goto failed_after_creation; /* never occur. When supporting
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700403 nilfs_init_acl(), proper cancellation of
404 above jobs should be considered */
405
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700406 return inode;
407
Ryusuke Konishi705304a2014-12-10 15:54:34 -0800408 failed_after_creation:
Miklos Szeredi6d6b77f2011-10-28 14:13:28 +0200409 clear_nlink(inode);
Ryusuke Konishi705304a2014-12-10 15:54:34 -0800410 unlock_new_inode(inode);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700411 iput(inode); /* raw_inode will be deleted through
Ryusuke Konishi705304a2014-12-10 15:54:34 -0800412 nilfs_evict_inode() */
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700413 goto failed;
414
415 failed_ifile_create_inode:
416 make_bad_inode(inode);
417 iput(inode); /* if i_nlink == 1, generic_forget_inode() will be
418 called */
419 failed:
420 return ERR_PTR(err);
421}
422
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700423void nilfs_set_inode_flags(struct inode *inode)
424{
425 unsigned int flags = NILFS_I(inode)->i_flags;
Ryusuke Konishifaea2c52015-04-16 12:46:50 -0700426 unsigned int new_fl = 0;
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700427
Ryusuke Konishif0c9f242011-01-20 02:09:52 +0900428 if (flags & FS_SYNC_FL)
Ryusuke Konishifaea2c52015-04-16 12:46:50 -0700429 new_fl |= S_SYNC;
Ryusuke Konishif0c9f242011-01-20 02:09:52 +0900430 if (flags & FS_APPEND_FL)
Ryusuke Konishifaea2c52015-04-16 12:46:50 -0700431 new_fl |= S_APPEND;
Ryusuke Konishif0c9f242011-01-20 02:09:52 +0900432 if (flags & FS_IMMUTABLE_FL)
Ryusuke Konishifaea2c52015-04-16 12:46:50 -0700433 new_fl |= S_IMMUTABLE;
Ryusuke Konishif0c9f242011-01-20 02:09:52 +0900434 if (flags & FS_NOATIME_FL)
Ryusuke Konishifaea2c52015-04-16 12:46:50 -0700435 new_fl |= S_NOATIME;
Ryusuke Konishif0c9f242011-01-20 02:09:52 +0900436 if (flags & FS_DIRSYNC_FL)
Ryusuke Konishifaea2c52015-04-16 12:46:50 -0700437 new_fl |= S_DIRSYNC;
438 inode_set_flags(inode, new_fl, S_SYNC | S_APPEND | S_IMMUTABLE |
439 S_NOATIME | S_DIRSYNC);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700440}
441
442int nilfs_read_inode_common(struct inode *inode,
443 struct nilfs_inode *raw_inode)
444{
445 struct nilfs_inode_info *ii = NILFS_I(inode);
446 int err;
447
448 inode->i_mode = le16_to_cpu(raw_inode->i_mode);
Eric W. Biederman305d3d02012-02-10 12:31:23 -0800449 i_uid_write(inode, le32_to_cpu(raw_inode->i_uid));
450 i_gid_write(inode, le32_to_cpu(raw_inode->i_gid));
Miklos Szeredibfe86842011-10-28 14:13:29 +0200451 set_nlink(inode, le16_to_cpu(raw_inode->i_links_count));
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700452 inode->i_size = le64_to_cpu(raw_inode->i_size);
453 inode->i_atime.tv_sec = le64_to_cpu(raw_inode->i_mtime);
454 inode->i_ctime.tv_sec = le64_to_cpu(raw_inode->i_ctime);
455 inode->i_mtime.tv_sec = le64_to_cpu(raw_inode->i_mtime);
Ryusuke Konishi61239232009-04-06 19:02:00 -0700456 inode->i_atime.tv_nsec = le32_to_cpu(raw_inode->i_mtime_nsec);
457 inode->i_ctime.tv_nsec = le32_to_cpu(raw_inode->i_ctime_nsec);
458 inode->i_mtime.tv_nsec = le32_to_cpu(raw_inode->i_mtime_nsec);
Ryusuke Konishi705304a2014-12-10 15:54:34 -0800459 if (inode->i_nlink == 0)
460 return -ESTALE; /* this inode is deleted */
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700461
462 inode->i_blocks = le64_to_cpu(raw_inode->i_blocks);
463 ii->i_flags = le32_to_cpu(raw_inode->i_flags);
464#if 0
465 ii->i_file_acl = le32_to_cpu(raw_inode->i_file_acl);
466 ii->i_dir_acl = S_ISREG(inode->i_mode) ?
467 0 : le32_to_cpu(raw_inode->i_dir_acl);
468#endif
Ryusuke Konishi3cc811b2009-09-28 13:02:46 +0900469 ii->i_dir_start_lookup = 0;
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700470 inode->i_generation = le32_to_cpu(raw_inode->i_generation);
471
472 if (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
473 S_ISLNK(inode->i_mode)) {
474 err = nilfs_bmap_read(ii->i_bmap, raw_inode);
475 if (err < 0)
476 return err;
477 set_bit(NILFS_I_BMAP, &ii->i_state);
478 /* No lock is needed; iget() ensures it. */
479 }
480 return 0;
481}
482
Ryusuke Konishie912a5b2010-08-14 13:07:15 +0900483static int __nilfs_read_inode(struct super_block *sb,
484 struct nilfs_root *root, unsigned long ino,
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700485 struct inode *inode)
486{
Ryusuke Konishie3154e92011-03-09 11:05:08 +0900487 struct the_nilfs *nilfs = sb->s_fs_info;
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700488 struct buffer_head *bh;
489 struct nilfs_inode *raw_inode;
490 int err;
491
Ryusuke Konishi365e2152010-12-27 00:07:30 +0900492 down_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem);
Ryusuke Konishie912a5b2010-08-14 13:07:15 +0900493 err = nilfs_ifile_get_inode_block(root->ifile, ino, &bh);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700494 if (unlikely(err))
495 goto bad_inode;
496
Ryusuke Konishie912a5b2010-08-14 13:07:15 +0900497 raw_inode = nilfs_ifile_map_inode(root->ifile, ino, bh);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700498
Ryusuke Konishi1b2f5a62009-08-22 19:10:07 +0900499 err = nilfs_read_inode_common(inode, raw_inode);
500 if (err)
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700501 goto failed_unmap;
502
503 if (S_ISREG(inode->i_mode)) {
504 inode->i_op = &nilfs_file_inode_operations;
505 inode->i_fop = &nilfs_file_operations;
506 inode->i_mapping->a_ops = &nilfs_aops;
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700507 } else if (S_ISDIR(inode->i_mode)) {
508 inode->i_op = &nilfs_dir_inode_operations;
509 inode->i_fop = &nilfs_dir_operations;
510 inode->i_mapping->a_ops = &nilfs_aops;
511 } else if (S_ISLNK(inode->i_mode)) {
512 inode->i_op = &nilfs_symlink_inode_operations;
513 inode->i_mapping->a_ops = &nilfs_aops;
514 } else {
515 inode->i_op = &nilfs_special_inode_operations;
516 init_special_inode(
517 inode, inode->i_mode,
Ryusuke Konishicdce2142010-05-09 15:31:22 +0900518 huge_decode_dev(le64_to_cpu(raw_inode->i_device_code)));
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700519 }
Ryusuke Konishie912a5b2010-08-14 13:07:15 +0900520 nilfs_ifile_unmap_inode(root->ifile, ino, bh);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700521 brelse(bh);
Ryusuke Konishi365e2152010-12-27 00:07:30 +0900522 up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700523 nilfs_set_inode_flags(inode);
Ryusuke Konishi0ce187c2015-04-16 12:46:47 -0700524 mapping_set_gfp_mask(inode->i_mapping,
Michal Hockoc62d2552015-11-06 16:28:49 -0800525 mapping_gfp_constraint(inode->i_mapping, ~__GFP_FS));
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700526 return 0;
527
528 failed_unmap:
Ryusuke Konishie912a5b2010-08-14 13:07:15 +0900529 nilfs_ifile_unmap_inode(root->ifile, ino, bh);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700530 brelse(bh);
531
532 bad_inode:
Ryusuke Konishi365e2152010-12-27 00:07:30 +0900533 up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700534 return err;
535}
536
Ryusuke Konishi0e14a352010-08-20 21:20:29 +0900537static int nilfs_iget_test(struct inode *inode, void *opaque)
538{
539 struct nilfs_iget_args *args = opaque;
540 struct nilfs_inode_info *ii;
541
Ryusuke Konishi4d8d9292010-08-25 17:45:44 +0900542 if (args->ino != inode->i_ino || args->root != NILFS_I(inode)->i_root)
Ryusuke Konishi0e14a352010-08-20 21:20:29 +0900543 return 0;
544
545 ii = NILFS_I(inode);
546 if (!test_bit(NILFS_I_GCINODE, &ii->i_state))
547 return !args->for_gc;
548
549 return args->for_gc && args->cno == ii->i_cno;
550}
551
552static int nilfs_iget_set(struct inode *inode, void *opaque)
553{
554 struct nilfs_iget_args *args = opaque;
555
556 inode->i_ino = args->ino;
557 if (args->for_gc) {
558 NILFS_I(inode)->i_state = 1 << NILFS_I_GCINODE;
559 NILFS_I(inode)->i_cno = args->cno;
Ryusuke Konishi4d8d9292010-08-25 17:45:44 +0900560 NILFS_I(inode)->i_root = NULL;
561 } else {
562 if (args->root && args->ino == NILFS_ROOT_INO)
563 nilfs_get_root(args->root);
564 NILFS_I(inode)->i_root = args->root;
Ryusuke Konishi0e14a352010-08-20 21:20:29 +0900565 }
566 return 0;
567}
568
Ryusuke Konishi032dbb32010-09-13 11:16:34 +0900569struct inode *nilfs_ilookup(struct super_block *sb, struct nilfs_root *root,
570 unsigned long ino)
571{
572 struct nilfs_iget_args args = {
573 .ino = ino, .root = root, .cno = 0, .for_gc = 0
574 };
575
576 return ilookup5(sb, ino, nilfs_iget_test, &args);
577}
578
Ryusuke Konishif1e89c82010-09-05 12:20:59 +0900579struct inode *nilfs_iget_locked(struct super_block *sb, struct nilfs_root *root,
580 unsigned long ino)
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700581{
Ryusuke Konishi4d8d9292010-08-25 17:45:44 +0900582 struct nilfs_iget_args args = {
583 .ino = ino, .root = root, .cno = 0, .for_gc = 0
584 };
Ryusuke Konishif1e89c82010-09-05 12:20:59 +0900585
586 return iget5_locked(sb, ino, nilfs_iget_test, nilfs_iget_set, &args);
587}
588
589struct inode *nilfs_iget(struct super_block *sb, struct nilfs_root *root,
590 unsigned long ino)
591{
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700592 struct inode *inode;
593 int err;
594
Ryusuke Konishif1e89c82010-09-05 12:20:59 +0900595 inode = nilfs_iget_locked(sb, root, ino);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700596 if (unlikely(!inode))
597 return ERR_PTR(-ENOMEM);
598 if (!(inode->i_state & I_NEW))
599 return inode;
600
Ryusuke Konishie912a5b2010-08-14 13:07:15 +0900601 err = __nilfs_read_inode(sb, root, ino, inode);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700602 if (unlikely(err)) {
603 iget_failed(inode);
604 return ERR_PTR(err);
605 }
606 unlock_new_inode(inode);
607 return inode;
608}
609
Ryusuke Konishi263d90c2010-08-20 19:06:11 +0900610struct inode *nilfs_iget_for_gc(struct super_block *sb, unsigned long ino,
611 __u64 cno)
612{
Ryusuke Konishi4d8d9292010-08-25 17:45:44 +0900613 struct nilfs_iget_args args = {
614 .ino = ino, .root = NULL, .cno = cno, .for_gc = 1
615 };
Ryusuke Konishi263d90c2010-08-20 19:06:11 +0900616 struct inode *inode;
617 int err;
618
619 inode = iget5_locked(sb, ino, nilfs_iget_test, nilfs_iget_set, &args);
620 if (unlikely(!inode))
621 return ERR_PTR(-ENOMEM);
622 if (!(inode->i_state & I_NEW))
623 return inode;
624
625 err = nilfs_init_gcinode(inode);
626 if (unlikely(err)) {
627 iget_failed(inode);
628 return ERR_PTR(err);
629 }
630 unlock_new_inode(inode);
631 return inode;
632}
633
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700634void nilfs_write_inode_common(struct inode *inode,
635 struct nilfs_inode *raw_inode, int has_bmap)
636{
637 struct nilfs_inode_info *ii = NILFS_I(inode);
638
639 raw_inode->i_mode = cpu_to_le16(inode->i_mode);
Eric W. Biederman305d3d02012-02-10 12:31:23 -0800640 raw_inode->i_uid = cpu_to_le32(i_uid_read(inode));
641 raw_inode->i_gid = cpu_to_le32(i_gid_read(inode));
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700642 raw_inode->i_links_count = cpu_to_le16(inode->i_nlink);
643 raw_inode->i_size = cpu_to_le64(inode->i_size);
644 raw_inode->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
645 raw_inode->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec);
Ryusuke Konishi61239232009-04-06 19:02:00 -0700646 raw_inode->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
647 raw_inode->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700648 raw_inode->i_blocks = cpu_to_le64(inode->i_blocks);
649
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700650 raw_inode->i_flags = cpu_to_le32(ii->i_flags);
651 raw_inode->i_generation = cpu_to_le32(inode->i_generation);
652
Ryusuke Konishi56eb5532011-04-30 18:56:12 +0900653 if (NILFS_ROOT_METADATA_FILE(inode->i_ino)) {
654 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
655
656 /* zero-fill unused portion in the case of super root block */
657 raw_inode->i_xattr = 0;
658 raw_inode->i_pad = 0;
659 memset((void *)raw_inode + sizeof(*raw_inode), 0,
660 nilfs->ns_inode_size - sizeof(*raw_inode));
661 }
662
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700663 if (has_bmap)
664 nilfs_bmap_write(ii->i_bmap, raw_inode);
665 else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
666 raw_inode->i_device_code =
Ryusuke Konishicdce2142010-05-09 15:31:22 +0900667 cpu_to_le64(huge_encode_dev(inode->i_rdev));
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700668 /* When extending inode, nilfs->ns_inode_size should be checked
669 for substitutions of appended fields */
670}
671
Andreas Rohnerb9f66142014-10-13 15:53:22 -0700672void nilfs_update_inode(struct inode *inode, struct buffer_head *ibh, int flags)
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700673{
674 ino_t ino = inode->i_ino;
675 struct nilfs_inode_info *ii = NILFS_I(inode);
Ryusuke Konishie912a5b2010-08-14 13:07:15 +0900676 struct inode *ifile = ii->i_root->ifile;
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700677 struct nilfs_inode *raw_inode;
678
Ryusuke Konishie912a5b2010-08-14 13:07:15 +0900679 raw_inode = nilfs_ifile_map_inode(ifile, ino, ibh);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700680
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700681 if (test_and_clear_bit(NILFS_I_NEW, &ii->i_state))
Ryusuke Konishie912a5b2010-08-14 13:07:15 +0900682 memset(raw_inode, 0, NILFS_MDT(ifile)->mi_entry_size);
Andreas Rohnerb9f66142014-10-13 15:53:22 -0700683 if (flags & I_DIRTY_DATASYNC)
684 set_bit(NILFS_I_INODE_SYNC, &ii->i_state);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700685
686 nilfs_write_inode_common(inode, raw_inode, 0);
687 /* XXX: call with has_bmap = 0 is a workaround to avoid
688 deadlock of bmap. This delays update of i_bmap to just
689 before writing */
Ryusuke Konishie912a5b2010-08-14 13:07:15 +0900690 nilfs_ifile_unmap_inode(ifile, ino, ibh);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700691}
692
693#define NILFS_MAX_TRUNCATE_BLOCKS 16384 /* 64MB for 4KB block */
694
695static void nilfs_truncate_bmap(struct nilfs_inode_info *ii,
696 unsigned long from)
697{
Ryusuke Konishi3568a132015-04-16 12:46:34 -0700698 __u64 b;
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700699 int ret;
700
701 if (!test_bit(NILFS_I_BMAP, &ii->i_state))
702 return;
Ryusuke Konishie8289492010-11-19 15:26:20 +0900703repeat:
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700704 ret = nilfs_bmap_last_key(ii->i_bmap, &b);
705 if (ret == -ENOENT)
706 return;
707 else if (ret < 0)
708 goto failed;
709
710 if (b < from)
711 return;
712
Ryusuke Konishi3568a132015-04-16 12:46:34 -0700713 b -= min_t(__u64, NILFS_MAX_TRUNCATE_BLOCKS, b - from);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700714 ret = nilfs_bmap_truncate(ii->i_bmap, b);
715 nilfs_relax_pressure_in_lock(ii->vfs_inode.i_sb);
716 if (!ret || (ret == -ENOMEM &&
717 nilfs_bmap_truncate(ii->i_bmap, b) == 0))
718 goto repeat;
719
Ryusuke Konishie8289492010-11-19 15:26:20 +0900720failed:
721 nilfs_warning(ii->vfs_inode.i_sb, __func__,
722 "failed to truncate bmap (ino=%lu, err=%d)",
723 ii->vfs_inode.i_ino, ret);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700724}
725
726void nilfs_truncate(struct inode *inode)
727{
728 unsigned long blkoff;
729 unsigned int blocksize;
730 struct nilfs_transaction_info ti;
731 struct super_block *sb = inode->i_sb;
732 struct nilfs_inode_info *ii = NILFS_I(inode);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700733
734 if (!test_bit(NILFS_I_BMAP, &ii->i_state))
735 return;
736 if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
737 return;
738
739 blocksize = sb->s_blocksize;
740 blkoff = (inode->i_size + blocksize - 1) >> sb->s_blocksize_bits;
Ryusuke Konishi1f5abe72009-04-06 19:01:55 -0700741 nilfs_transaction_begin(sb, &ti, 0); /* never fails */
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700742
743 block_truncate_page(inode->i_mapping, inode->i_size, nilfs_get_block);
744
745 nilfs_truncate_bmap(ii, blkoff);
746
747 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
748 if (IS_SYNC(inode))
749 nilfs_set_transaction_flag(NILFS_TI_SYNC);
750
Jiro SEKIBAabdb3182009-11-27 19:41:14 +0900751 nilfs_mark_inode_dirty(inode);
Ryusuke Konishibcbc8c62010-12-27 00:05:49 +0900752 nilfs_set_file_dirty(inode, 0);
Ryusuke Konishi47420c72009-04-06 19:01:45 -0700753 nilfs_transaction_commit(sb);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700754 /* May construct a logical segment and may fail in sync mode.
755 But truncate has no return value. */
756}
757
Al Viro6fd1e5c2010-06-07 11:55:00 -0400758static void nilfs_clear_inode(struct inode *inode)
759{
760 struct nilfs_inode_info *ii = NILFS_I(inode);
Ryusuke Konishi518d1a62010-08-20 23:40:54 +0900761 struct nilfs_mdt_info *mdi = NILFS_MDT(inode);
Al Viro6fd1e5c2010-06-07 11:55:00 -0400762
763 /*
764 * Free resources allocated in nilfs_read_inode(), here.
765 */
766 BUG_ON(!list_empty(&ii->i_dirty));
767 brelse(ii->i_bh);
768 ii->i_bh = NULL;
769
Ryusuke Konishi518d1a62010-08-20 23:40:54 +0900770 if (mdi && mdi->mi_palloc_cache)
771 nilfs_palloc_destroy_cache(inode);
772
Al Viro6fd1e5c2010-06-07 11:55:00 -0400773 if (test_bit(NILFS_I_BMAP, &ii->i_state))
774 nilfs_bmap_clear(ii->i_bmap);
775
776 nilfs_btnode_cache_clear(&ii->i_btnode_cache);
Ryusuke Konishi4d8d9292010-08-25 17:45:44 +0900777
778 if (ii->i_root && inode->i_ino == NILFS_ROOT_INO)
779 nilfs_put_root(ii->i_root);
Al Viro6fd1e5c2010-06-07 11:55:00 -0400780}
781
782void nilfs_evict_inode(struct inode *inode)
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700783{
784 struct nilfs_transaction_info ti;
785 struct super_block *sb = inode->i_sb;
786 struct nilfs_inode_info *ii = NILFS_I(inode);
Ryusuke Konishi25b18d32011-02-11 15:23:27 +0900787 int ret;
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700788
Ryusuke Konishi4d8d9292010-08-25 17:45:44 +0900789 if (inode->i_nlink || !ii->i_root || unlikely(is_bad_inode(inode))) {
Johannes Weiner91b0abe2014-04-03 14:47:49 -0700790 truncate_inode_pages_final(&inode->i_data);
Jan Karadbd57682012-05-03 14:48:02 +0200791 clear_inode(inode);
Al Viro6fd1e5c2010-06-07 11:55:00 -0400792 nilfs_clear_inode(inode);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700793 return;
794 }
Ryusuke Konishi1f5abe72009-04-06 19:01:55 -0700795 nilfs_transaction_begin(sb, &ti, 0); /* never fails */
796
Johannes Weiner91b0abe2014-04-03 14:47:49 -0700797 truncate_inode_pages_final(&inode->i_data);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700798
Ryusuke Konishie912a5b2010-08-14 13:07:15 +0900799 /* TODO: some of the following operations may fail. */
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700800 nilfs_truncate_bmap(ii, 0);
Jiro SEKIBAabdb3182009-11-27 19:41:14 +0900801 nilfs_mark_inode_dirty(inode);
Jan Karadbd57682012-05-03 14:48:02 +0200802 clear_inode(inode);
Ryusuke Konishie912a5b2010-08-14 13:07:15 +0900803
Ryusuke Konishi25b18d32011-02-11 15:23:27 +0900804 ret = nilfs_ifile_delete_inode(ii->i_root->ifile, inode->i_ino);
805 if (!ret)
Vyacheslav Dubeykoe5f7f842013-07-03 15:08:06 -0700806 atomic64_dec(&ii->i_root->inodes_count);
Ryusuke Konishie912a5b2010-08-14 13:07:15 +0900807
Al Viro6fd1e5c2010-06-07 11:55:00 -0400808 nilfs_clear_inode(inode);
Ryusuke Konishie912a5b2010-08-14 13:07:15 +0900809
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700810 if (IS_SYNC(inode))
811 nilfs_set_transaction_flag(NILFS_TI_SYNC);
Ryusuke Konishi47420c72009-04-06 19:01:45 -0700812 nilfs_transaction_commit(sb);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700813 /* May construct a logical segment and may fail in sync mode.
814 But delete_inode has no return value. */
815}
816
817int nilfs_setattr(struct dentry *dentry, struct iattr *iattr)
818{
819 struct nilfs_transaction_info ti;
David Howells2b0143b2015-03-17 22:25:59 +0000820 struct inode *inode = d_inode(dentry);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700821 struct super_block *sb = inode->i_sb;
Ryusuke Konishi47420c72009-04-06 19:01:45 -0700822 int err;
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700823
824 err = inode_change_ok(inode, iattr);
825 if (err)
826 return err;
827
828 err = nilfs_transaction_begin(sb, &ti, 0);
829 if (unlikely(err))
830 return err;
Ryusuke Konishi47420c72009-04-06 19:01:45 -0700831
Christoph Hellwig10257742010-06-04 11:30:02 +0200832 if ((iattr->ia_valid & ATTR_SIZE) &&
833 iattr->ia_size != i_size_read(inode)) {
Christoph Hellwig562c72a2011-06-24 14:29:45 -0400834 inode_dio_wait(inode);
Marco Stornelli2d1b3992012-12-15 11:57:37 +0100835 truncate_setsize(inode, iattr->ia_size);
836 nilfs_truncate(inode);
Christoph Hellwig10257742010-06-04 11:30:02 +0200837 }
838
839 setattr_copy(inode, iattr);
840 mark_inode_dirty(inode);
841
842 if (iattr->ia_valid & ATTR_MODE) {
843 err = nilfs_acl_chmod(inode);
844 if (unlikely(err))
845 goto out_err;
846 }
847
848 return nilfs_transaction_commit(sb);
849
850out_err:
851 nilfs_transaction_abort(sb);
Ryusuke Konishi47420c72009-04-06 19:01:45 -0700852 return err;
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700853}
854
Al Viro10556cb2011-06-20 19:28:19 -0400855int nilfs_permission(struct inode *inode, int mask)
Ryusuke Konishidc3d3b82010-08-15 23:33:57 +0900856{
Al Viro730e9082011-06-18 20:21:44 -0400857 struct nilfs_root *root = NILFS_I(inode)->i_root;
Ryusuke Konishidc3d3b82010-08-15 23:33:57 +0900858 if ((mask & MAY_WRITE) && root &&
859 root->cno != NILFS_CPTREE_CURRENT_CNO)
860 return -EROFS; /* snapshot is not writable */
861
Al Viro2830ba72011-06-20 19:16:29 -0400862 return generic_permission(inode, mask);
Ryusuke Konishidc3d3b82010-08-15 23:33:57 +0900863}
864
Ryusuke Konishibcbc8c62010-12-27 00:05:49 +0900865int nilfs_load_inode_block(struct inode *inode, struct buffer_head **pbh)
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700866{
Ryusuke Konishie3154e92011-03-09 11:05:08 +0900867 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700868 struct nilfs_inode_info *ii = NILFS_I(inode);
869 int err;
870
Ryusuke Konishi693dd322011-03-09 11:05:07 +0900871 spin_lock(&nilfs->ns_inode_lock);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700872 if (ii->i_bh == NULL) {
Ryusuke Konishi693dd322011-03-09 11:05:07 +0900873 spin_unlock(&nilfs->ns_inode_lock);
Ryusuke Konishie912a5b2010-08-14 13:07:15 +0900874 err = nilfs_ifile_get_inode_block(ii->i_root->ifile,
875 inode->i_ino, pbh);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700876 if (unlikely(err))
877 return err;
Ryusuke Konishi693dd322011-03-09 11:05:07 +0900878 spin_lock(&nilfs->ns_inode_lock);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700879 if (ii->i_bh == NULL)
880 ii->i_bh = *pbh;
881 else {
882 brelse(*pbh);
883 *pbh = ii->i_bh;
884 }
885 } else
886 *pbh = ii->i_bh;
887
888 get_bh(*pbh);
Ryusuke Konishi693dd322011-03-09 11:05:07 +0900889 spin_unlock(&nilfs->ns_inode_lock);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700890 return 0;
891}
892
893int nilfs_inode_dirty(struct inode *inode)
894{
895 struct nilfs_inode_info *ii = NILFS_I(inode);
Ryusuke Konishie3154e92011-03-09 11:05:08 +0900896 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700897 int ret = 0;
898
899 if (!list_empty(&ii->i_dirty)) {
Ryusuke Konishi693dd322011-03-09 11:05:07 +0900900 spin_lock(&nilfs->ns_inode_lock);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700901 ret = test_bit(NILFS_I_DIRTY, &ii->i_state) ||
902 test_bit(NILFS_I_BUSY, &ii->i_state);
Ryusuke Konishi693dd322011-03-09 11:05:07 +0900903 spin_unlock(&nilfs->ns_inode_lock);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700904 }
905 return ret;
906}
907
Ryusuke Konishibcbc8c62010-12-27 00:05:49 +0900908int nilfs_set_file_dirty(struct inode *inode, unsigned nr_dirty)
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700909{
910 struct nilfs_inode_info *ii = NILFS_I(inode);
Ryusuke Konishie3154e92011-03-09 11:05:08 +0900911 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700912
Ryusuke Konishi693dd322011-03-09 11:05:07 +0900913 atomic_add(nr_dirty, &nilfs->ns_ndirtyblks);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700914
Ryusuke Konishi458c5b02009-04-06 19:01:56 -0700915 if (test_and_set_bit(NILFS_I_DIRTY, &ii->i_state))
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700916 return 0;
917
Ryusuke Konishi693dd322011-03-09 11:05:07 +0900918 spin_lock(&nilfs->ns_inode_lock);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700919 if (!test_bit(NILFS_I_QUEUED, &ii->i_state) &&
920 !test_bit(NILFS_I_BUSY, &ii->i_state)) {
921 /* Because this routine may race with nilfs_dispose_list(),
922 we have to check NILFS_I_QUEUED here, too. */
923 if (list_empty(&ii->i_dirty) && igrab(inode) == NULL) {
924 /* This will happen when somebody is freeing
925 this inode. */
Ryusuke Konishi693dd322011-03-09 11:05:07 +0900926 nilfs_warning(inode->i_sb, __func__,
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700927 "cannot get inode (ino=%lu)\n",
928 inode->i_ino);
Ryusuke Konishi693dd322011-03-09 11:05:07 +0900929 spin_unlock(&nilfs->ns_inode_lock);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700930 return -EINVAL; /* NILFS_I_DIRTY may remain for
931 freeing inode */
932 }
Nicolas Kaisereaae0f32011-03-19 16:45:30 +0100933 list_move_tail(&ii->i_dirty, &nilfs->ns_dirty_files);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700934 set_bit(NILFS_I_QUEUED, &ii->i_state);
935 }
Ryusuke Konishi693dd322011-03-09 11:05:07 +0900936 spin_unlock(&nilfs->ns_inode_lock);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700937 return 0;
938}
939
Andreas Rohnerb9f66142014-10-13 15:53:22 -0700940int __nilfs_mark_inode_dirty(struct inode *inode, int flags)
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700941{
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700942 struct buffer_head *ibh;
943 int err;
944
Ryusuke Konishibcbc8c62010-12-27 00:05:49 +0900945 err = nilfs_load_inode_block(inode, &ibh);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700946 if (unlikely(err)) {
947 nilfs_warning(inode->i_sb, __func__,
948 "failed to reget inode block.\n");
949 return err;
950 }
Andreas Rohnerb9f66142014-10-13 15:53:22 -0700951 nilfs_update_inode(inode, ibh, flags);
Ryusuke Konishi5fc7b142011-05-05 12:56:51 +0900952 mark_buffer_dirty(ibh);
Ryusuke Konishie912a5b2010-08-14 13:07:15 +0900953 nilfs_mdt_mark_dirty(NILFS_I(inode)->i_root->ifile);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700954 brelse(ibh);
955 return 0;
956}
957
958/**
959 * nilfs_dirty_inode - reflect changes on given inode to an inode block.
960 * @inode: inode of the file to be registered.
961 *
962 * nilfs_dirty_inode() loads a inode block containing the specified
963 * @inode and copies data from a nilfs_inode to a corresponding inode
964 * entry in the inode block. This operation is excluded from the segment
965 * construction. This function can be called both as a single operation
966 * and as a part of indivisible file operations.
967 */
Christoph Hellwigaa385722011-05-27 06:53:02 -0400968void nilfs_dirty_inode(struct inode *inode, int flags)
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700969{
970 struct nilfs_transaction_info ti;
Ryusuke Konishi7d6cd922010-08-21 00:30:39 +0900971 struct nilfs_mdt_info *mdi = NILFS_MDT(inode);
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700972
973 if (is_bad_inode(inode)) {
974 nilfs_warning(inode->i_sb, __func__,
975 "tried to mark bad_inode dirty. ignored.\n");
976 dump_stack();
977 return;
978 }
Ryusuke Konishi7d6cd922010-08-21 00:30:39 +0900979 if (mdi) {
980 nilfs_mdt_mark_dirty(inode);
981 return;
982 }
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700983 nilfs_transaction_begin(inode->i_sb, &ti, 0);
Andreas Rohnerb9f66142014-10-13 15:53:22 -0700984 __nilfs_mark_inode_dirty(inode, flags);
Ryusuke Konishi47420c72009-04-06 19:01:45 -0700985 nilfs_transaction_commit(inode->i_sb); /* never fails */
Ryusuke Konishi05fe58f2009-04-06 19:01:32 -0700986}
Ryusuke Konishi622daaff2010-12-26 16:38:43 +0900987
988int nilfs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
989 __u64 start, __u64 len)
990{
Ryusuke Konishi0ef28f92011-05-05 12:56:51 +0900991 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
Ryusuke Konishi622daaff2010-12-26 16:38:43 +0900992 __u64 logical = 0, phys = 0, size = 0;
993 __u32 flags = 0;
994 loff_t isize;
995 sector_t blkoff, end_blkoff;
996 sector_t delalloc_blkoff;
997 unsigned long delalloc_blklen;
998 unsigned int blkbits = inode->i_blkbits;
999 int ret, n;
1000
1001 ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC);
1002 if (ret)
1003 return ret;
1004
1005 mutex_lock(&inode->i_mutex);
1006
1007 isize = i_size_read(inode);
1008
1009 blkoff = start >> blkbits;
1010 end_blkoff = (start + len - 1) >> blkbits;
1011
1012 delalloc_blklen = nilfs_find_uncommitted_extent(inode, blkoff,
1013 &delalloc_blkoff);
1014
1015 do {
1016 __u64 blkphy;
1017 unsigned int maxblocks;
1018
1019 if (delalloc_blklen && blkoff == delalloc_blkoff) {
1020 if (size) {
1021 /* End of the current extent */
1022 ret = fiemap_fill_next_extent(
1023 fieinfo, logical, phys, size, flags);
1024 if (ret)
1025 break;
1026 }
1027 if (blkoff > end_blkoff)
1028 break;
1029
1030 flags = FIEMAP_EXTENT_MERGED | FIEMAP_EXTENT_DELALLOC;
1031 logical = blkoff << blkbits;
1032 phys = 0;
1033 size = delalloc_blklen << blkbits;
1034
1035 blkoff = delalloc_blkoff + delalloc_blklen;
1036 delalloc_blklen = nilfs_find_uncommitted_extent(
1037 inode, blkoff, &delalloc_blkoff);
1038 continue;
1039 }
1040
1041 /*
1042 * Limit the number of blocks that we look up so as
1043 * not to get into the next delayed allocation extent.
1044 */
1045 maxblocks = INT_MAX;
1046 if (delalloc_blklen)
1047 maxblocks = min_t(sector_t, delalloc_blkoff - blkoff,
1048 maxblocks);
1049 blkphy = 0;
1050
1051 down_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem);
1052 n = nilfs_bmap_lookup_contig(
1053 NILFS_I(inode)->i_bmap, blkoff, &blkphy, maxblocks);
1054 up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem);
1055
1056 if (n < 0) {
1057 int past_eof;
1058
1059 if (unlikely(n != -ENOENT))
1060 break; /* error */
1061
1062 /* HOLE */
1063 blkoff++;
1064 past_eof = ((blkoff << blkbits) >= isize);
1065
1066 if (size) {
1067 /* End of the current extent */
1068
1069 if (past_eof)
1070 flags |= FIEMAP_EXTENT_LAST;
1071
1072 ret = fiemap_fill_next_extent(
1073 fieinfo, logical, phys, size, flags);
1074 if (ret)
1075 break;
1076 size = 0;
1077 }
1078 if (blkoff > end_blkoff || past_eof)
1079 break;
1080 } else {
1081 if (size) {
1082 if (phys && blkphy << blkbits == phys + size) {
1083 /* The current extent goes on */
1084 size += n << blkbits;
1085 } else {
1086 /* Terminate the current extent */
1087 ret = fiemap_fill_next_extent(
1088 fieinfo, logical, phys, size,
1089 flags);
1090 if (ret || blkoff > end_blkoff)
1091 break;
1092
1093 /* Start another extent */
1094 flags = FIEMAP_EXTENT_MERGED;
1095 logical = blkoff << blkbits;
1096 phys = blkphy << blkbits;
1097 size = n << blkbits;
1098 }
1099 } else {
1100 /* Start a new extent */
1101 flags = FIEMAP_EXTENT_MERGED;
1102 logical = blkoff << blkbits;
1103 phys = blkphy << blkbits;
1104 size = n << blkbits;
1105 }
1106 blkoff += n;
1107 }
1108 cond_resched();
1109 } while (true);
1110
1111 /* If ret is 1 then we just hit the end of the extent array */
1112 if (ret == 1)
1113 ret = 0;
1114
1115 mutex_unlock(&inode->i_mutex);
1116 return ret;
1117}