Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 1 | /* |
| 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 | * |
Ryusuke Konishi | 4b420ab | 2016-05-23 16:23:09 -0700 | [diff] [blame] | 16 | * Written by Ryusuke Konishi. |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 17 | * |
| 18 | */ |
| 19 | |
| 20 | #include <linux/buffer_head.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 21 | #include <linux/gfp.h> |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 22 | #include <linux/mpage.h> |
Andreas Rohner | 56d7acc | 2014-09-25 16:05:14 -0700 | [diff] [blame] | 23 | #include <linux/pagemap.h> |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 24 | #include <linux/writeback.h> |
Christoph Hellwig | e2e40f2 | 2015-02-22 08:58:50 -0800 | [diff] [blame] | 25 | #include <linux/uio.h> |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 26 | #include "nilfs.h" |
Al Viro | 6fd1e5c | 2010-06-07 11:55:00 -0400 | [diff] [blame] | 27 | #include "btnode.h" |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 28 | #include "segment.h" |
| 29 | #include "page.h" |
| 30 | #include "mdt.h" |
| 31 | #include "cpfile.h" |
| 32 | #include "ifile.h" |
| 33 | |
Vyacheslav Dubeyko | f5974c8 | 2012-07-30 14:42:10 -0700 | [diff] [blame] | 34 | /** |
| 35 | * struct nilfs_iget_args - arguments used during comparison between inodes |
| 36 | * @ino: inode number |
| 37 | * @cno: checkpoint number |
| 38 | * @root: pointer on NILFS root object (mounted checkpoint) |
| 39 | * @for_gc: inode for GC flag |
| 40 | */ |
Ryusuke Konishi | 0e14a35 | 2010-08-20 21:20:29 +0900 | [diff] [blame] | 41 | struct nilfs_iget_args { |
| 42 | u64 ino; |
| 43 | __u64 cno; |
Ryusuke Konishi | 4d8d929 | 2010-08-25 17:45:44 +0900 | [diff] [blame] | 44 | struct nilfs_root *root; |
Ryusuke Konishi | 0e14a35 | 2010-08-20 21:20:29 +0900 | [diff] [blame] | 45 | int for_gc; |
| 46 | }; |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 47 | |
Ryusuke Konishi | 705304a | 2014-12-10 15:54:34 -0800 | [diff] [blame] | 48 | static int nilfs_iget_test(struct inode *inode, void *opaque); |
| 49 | |
Ryusuke Konishi | be66737 | 2011-03-05 00:19:32 +0900 | [diff] [blame] | 50 | void nilfs_inode_add_blocks(struct inode *inode, int n) |
| 51 | { |
| 52 | struct nilfs_root *root = NILFS_I(inode)->i_root; |
| 53 | |
| 54 | inode_add_bytes(inode, (1 << inode->i_blkbits) * n); |
| 55 | if (root) |
Vyacheslav Dubeyko | e5f7f84 | 2013-07-03 15:08:06 -0700 | [diff] [blame] | 56 | atomic64_add(n, &root->blocks_count); |
Ryusuke Konishi | be66737 | 2011-03-05 00:19:32 +0900 | [diff] [blame] | 57 | } |
| 58 | |
| 59 | void nilfs_inode_sub_blocks(struct inode *inode, int n) |
| 60 | { |
| 61 | struct nilfs_root *root = NILFS_I(inode)->i_root; |
| 62 | |
| 63 | inode_sub_bytes(inode, (1 << inode->i_blkbits) * n); |
| 64 | if (root) |
Vyacheslav Dubeyko | e5f7f84 | 2013-07-03 15:08:06 -0700 | [diff] [blame] | 65 | atomic64_sub(n, &root->blocks_count); |
Ryusuke Konishi | be66737 | 2011-03-05 00:19:32 +0900 | [diff] [blame] | 66 | } |
| 67 | |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 68 | /** |
| 69 | * nilfs_get_block() - get a file block on the filesystem (callback function) |
| 70 | * @inode - inode struct of the target file |
| 71 | * @blkoff - file block number |
| 72 | * @bh_result - buffer head to be mapped on |
| 73 | * @create - indicate whether allocating the block or not when it has not |
| 74 | * been allocated yet. |
| 75 | * |
| 76 | * This function does not issue actual read request of the specified data |
| 77 | * block. It is done by VFS. |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 78 | */ |
| 79 | int nilfs_get_block(struct inode *inode, sector_t blkoff, |
| 80 | struct buffer_head *bh_result, int create) |
| 81 | { |
| 82 | struct nilfs_inode_info *ii = NILFS_I(inode); |
Ryusuke Konishi | 0ef28f9 | 2011-05-05 12:56:51 +0900 | [diff] [blame] | 83 | struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
Ryusuke Konishi | c3a7abf | 2009-05-25 02:47:14 +0900 | [diff] [blame] | 84 | __u64 blknum = 0; |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 85 | int err = 0, ret; |
Ryusuke Konishi | 0c6c44c | 2016-05-23 16:23:39 -0700 | [diff] [blame] | 86 | unsigned int maxblocks = bh_result->b_size >> inode->i_blkbits; |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 87 | |
Ryusuke Konishi | 0ef28f9 | 2011-05-05 12:56:51 +0900 | [diff] [blame] | 88 | down_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); |
Ryusuke Konishi | c3a7abf | 2009-05-25 02:47:14 +0900 | [diff] [blame] | 89 | ret = nilfs_bmap_lookup_contig(ii->i_bmap, blkoff, &blknum, maxblocks); |
Ryusuke Konishi | 0ef28f9 | 2011-05-05 12:56:51 +0900 | [diff] [blame] | 90 | up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); |
Ryusuke Konishi | c3a7abf | 2009-05-25 02:47:14 +0900 | [diff] [blame] | 91 | if (ret >= 0) { /* found */ |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 92 | map_bh(bh_result, inode->i_sb, blknum); |
Ryusuke Konishi | c3a7abf | 2009-05-25 02:47:14 +0900 | [diff] [blame] | 93 | if (ret > 0) |
| 94 | bh_result->b_size = (ret << inode->i_blkbits); |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 95 | goto out; |
| 96 | } |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 97 | /* data block was not found */ |
| 98 | if (ret == -ENOENT && create) { |
| 99 | struct nilfs_transaction_info ti; |
| 100 | |
| 101 | bh_result->b_blocknr = 0; |
| 102 | err = nilfs_transaction_begin(inode->i_sb, &ti, 1); |
| 103 | if (unlikely(err)) |
| 104 | goto out; |
Ryusuke Konishi | 3568a13 | 2015-04-16 12:46:34 -0700 | [diff] [blame] | 105 | err = nilfs_bmap_insert(ii->i_bmap, blkoff, |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 106 | (unsigned long)bh_result); |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 107 | if (unlikely(err != 0)) { |
| 108 | if (err == -EEXIST) { |
| 109 | /* |
| 110 | * The get_block() function could be called |
| 111 | * from multiple callers for an inode. |
| 112 | * However, the page having this block must |
| 113 | * be locked in this case. |
| 114 | */ |
Ryusuke Konishi | feee880 | 2016-08-02 14:05:10 -0700 | [diff] [blame] | 115 | nilfs_msg(inode->i_sb, KERN_WARNING, |
| 116 | "%s (ino=%lu): a race condition while inserting a data block at offset=%llu", |
| 117 | __func__, inode->i_ino, |
| 118 | (unsigned long long)blkoff); |
Ryusuke Konishi | 1f5abe7 | 2009-04-06 19:01:55 -0700 | [diff] [blame] | 119 | err = 0; |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 120 | } |
Ryusuke Konishi | 47420c7 | 2009-04-06 19:01:45 -0700 | [diff] [blame] | 121 | nilfs_transaction_abort(inode->i_sb); |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 122 | goto out; |
| 123 | } |
Andreas Rohner | b9f6614 | 2014-10-13 15:53:22 -0700 | [diff] [blame] | 124 | nilfs_mark_inode_dirty_sync(inode); |
Ryusuke Konishi | 47420c7 | 2009-04-06 19:01:45 -0700 | [diff] [blame] | 125 | nilfs_transaction_commit(inode->i_sb); /* never fails */ |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 126 | /* Error handling should be detailed */ |
| 127 | set_buffer_new(bh_result); |
Ryusuke Konishi | 27e6c7a | 2010-12-26 16:28:28 +0900 | [diff] [blame] | 128 | set_buffer_delay(bh_result); |
Ryusuke Konishi | 076a378 | 2016-05-23 16:23:48 -0700 | [diff] [blame] | 129 | map_bh(bh_result, inode->i_sb, 0); |
| 130 | /* Disk block number must be changed to proper value */ |
| 131 | |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 132 | } else if (ret == -ENOENT) { |
Ryusuke Konishi | 076a378 | 2016-05-23 16:23:48 -0700 | [diff] [blame] | 133 | /* |
| 134 | * not found is not error (e.g. hole); must return without |
| 135 | * the mapped state flag. |
| 136 | */ |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 137 | ; |
| 138 | } else { |
| 139 | err = ret; |
| 140 | } |
| 141 | |
| 142 | out: |
| 143 | return err; |
| 144 | } |
| 145 | |
| 146 | /** |
| 147 | * nilfs_readpage() - implement readpage() method of nilfs_aops {} |
| 148 | * address_space_operations. |
| 149 | * @file - file struct of the file to be read |
| 150 | * @page - the page to be read |
| 151 | */ |
| 152 | static int nilfs_readpage(struct file *file, struct page *page) |
| 153 | { |
| 154 | return mpage_readpage(page, nilfs_get_block); |
| 155 | } |
| 156 | |
| 157 | /** |
| 158 | * nilfs_readpages() - implement readpages() method of nilfs_aops {} |
| 159 | * address_space_operations. |
| 160 | * @file - file struct of the file to be read |
| 161 | * @mapping - address_space struct used for reading multiple pages |
| 162 | * @pages - the pages to be read |
| 163 | * @nr_pages - number of pages to be read |
| 164 | */ |
| 165 | static int nilfs_readpages(struct file *file, struct address_space *mapping, |
Ryusuke Konishi | 0c6c44c | 2016-05-23 16:23:39 -0700 | [diff] [blame] | 166 | struct list_head *pages, unsigned int nr_pages) |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 167 | { |
| 168 | return mpage_readpages(mapping, pages, nr_pages, nilfs_get_block); |
| 169 | } |
| 170 | |
| 171 | static int nilfs_writepages(struct address_space *mapping, |
| 172 | struct writeback_control *wbc) |
| 173 | { |
Ryusuke Konishi | f30bf3e | 2009-04-06 19:01:38 -0700 | [diff] [blame] | 174 | struct inode *inode = mapping->host; |
| 175 | int err = 0; |
| 176 | |
Vyacheslav Dubeyko | 8c26c4e | 2013-04-30 15:27:48 -0700 | [diff] [blame] | 177 | if (inode->i_sb->s_flags & MS_RDONLY) { |
| 178 | nilfs_clear_dirty_pages(mapping, false); |
| 179 | return -EROFS; |
| 180 | } |
| 181 | |
Ryusuke Konishi | f30bf3e | 2009-04-06 19:01:38 -0700 | [diff] [blame] | 182 | if (wbc->sync_mode == WB_SYNC_ALL) |
| 183 | err = nilfs_construct_dsync_segment(inode->i_sb, inode, |
| 184 | wbc->range_start, |
| 185 | wbc->range_end); |
| 186 | return err; |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 187 | } |
| 188 | |
| 189 | static int nilfs_writepage(struct page *page, struct writeback_control *wbc) |
| 190 | { |
| 191 | struct inode *inode = page->mapping->host; |
| 192 | int err; |
| 193 | |
Vyacheslav Dubeyko | eb53b6d | 2013-04-30 15:27:51 -0700 | [diff] [blame] | 194 | if (inode->i_sb->s_flags & MS_RDONLY) { |
Vyacheslav Dubeyko | 8c26c4e | 2013-04-30 15:27:48 -0700 | [diff] [blame] | 195 | /* |
| 196 | * It means that filesystem was remounted in read-only |
| 197 | * mode because of error or metadata corruption. But we |
| 198 | * have dirty pages that try to be flushed in background. |
| 199 | * So, here we simply discard this dirty page. |
| 200 | */ |
| 201 | nilfs_clear_dirty_page(page, false); |
| 202 | unlock_page(page); |
| 203 | return -EROFS; |
| 204 | } |
| 205 | |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 206 | redirty_page_for_writepage(wbc, page); |
| 207 | unlock_page(page); |
| 208 | |
| 209 | if (wbc->sync_mode == WB_SYNC_ALL) { |
| 210 | err = nilfs_construct_segment(inode->i_sb); |
| 211 | if (unlikely(err)) |
| 212 | return err; |
| 213 | } else if (wbc->for_reclaim) |
| 214 | nilfs_flush_segment(inode->i_sb, inode->i_ino); |
| 215 | |
| 216 | return 0; |
| 217 | } |
| 218 | |
| 219 | static int nilfs_set_page_dirty(struct page *page) |
| 220 | { |
Andreas Rohner | 56d7acc | 2014-09-25 16:05:14 -0700 | [diff] [blame] | 221 | struct inode *inode = page->mapping->host; |
Ryusuke Konishi | 136e877 | 2013-05-24 15:55:29 -0700 | [diff] [blame] | 222 | int ret = __set_page_dirty_nobuffers(page); |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 223 | |
Ryusuke Konishi | 136e877 | 2013-05-24 15:55:29 -0700 | [diff] [blame] | 224 | if (page_has_buffers(page)) { |
Ryusuke Konishi | 0c6c44c | 2016-05-23 16:23:39 -0700 | [diff] [blame] | 225 | unsigned int nr_dirty = 0; |
Ryusuke Konishi | 136e877 | 2013-05-24 15:55:29 -0700 | [diff] [blame] | 226 | struct buffer_head *bh, *head; |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 227 | |
Ryusuke Konishi | 136e877 | 2013-05-24 15:55:29 -0700 | [diff] [blame] | 228 | /* |
| 229 | * This page is locked by callers, and no other thread |
| 230 | * concurrently marks its buffers dirty since they are |
| 231 | * only dirtied through routines in fs/buffer.c in |
| 232 | * which call sites of mark_buffer_dirty are protected |
| 233 | * by page lock. |
| 234 | */ |
| 235 | bh = head = page_buffers(page); |
| 236 | do { |
| 237 | /* Do not mark hole blocks dirty */ |
| 238 | if (buffer_dirty(bh) || !buffer_mapped(bh)) |
| 239 | continue; |
| 240 | |
| 241 | set_buffer_dirty(bh); |
| 242 | nr_dirty++; |
| 243 | } while (bh = bh->b_this_page, bh != head); |
| 244 | |
| 245 | if (nr_dirty) |
| 246 | nilfs_set_file_dirty(inode, nr_dirty); |
Andreas Rohner | 56d7acc | 2014-09-25 16:05:14 -0700 | [diff] [blame] | 247 | } else if (ret) { |
Ryusuke Konishi | 0c6c44c | 2016-05-23 16:23:39 -0700 | [diff] [blame] | 248 | unsigned int nr_dirty = 1 << (PAGE_SHIFT - inode->i_blkbits); |
Andreas Rohner | 56d7acc | 2014-09-25 16:05:14 -0700 | [diff] [blame] | 249 | |
| 250 | nilfs_set_file_dirty(inode, nr_dirty); |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 251 | } |
| 252 | return ret; |
| 253 | } |
| 254 | |
Marco Stornelli | 2d1b399 | 2012-12-15 11:57:37 +0100 | [diff] [blame] | 255 | void nilfs_write_failed(struct address_space *mapping, loff_t to) |
| 256 | { |
| 257 | struct inode *inode = mapping->host; |
| 258 | |
| 259 | if (to > inode->i_size) { |
Kirill A. Shutemov | 7caef26 | 2013-09-12 15:13:56 -0700 | [diff] [blame] | 260 | truncate_pagecache(inode, inode->i_size); |
Marco Stornelli | 2d1b399 | 2012-12-15 11:57:37 +0100 | [diff] [blame] | 261 | nilfs_truncate(inode); |
| 262 | } |
| 263 | } |
| 264 | |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 265 | static int nilfs_write_begin(struct file *file, struct address_space *mapping, |
| 266 | loff_t pos, unsigned len, unsigned flags, |
| 267 | struct page **pagep, void **fsdata) |
| 268 | |
| 269 | { |
| 270 | struct inode *inode = mapping->host; |
| 271 | int err = nilfs_transaction_begin(inode->i_sb, NULL, 1); |
| 272 | |
| 273 | if (unlikely(err)) |
| 274 | return err; |
| 275 | |
Christoph Hellwig | 155130a | 2010-06-04 11:29:58 +0200 | [diff] [blame] | 276 | err = block_write_begin(mapping, pos, len, flags, pagep, |
| 277 | nilfs_get_block); |
| 278 | if (unlikely(err)) { |
Marco Stornelli | 2d1b399 | 2012-12-15 11:57:37 +0100 | [diff] [blame] | 279 | nilfs_write_failed(mapping, pos + len); |
Ryusuke Konishi | 47420c7 | 2009-04-06 19:01:45 -0700 | [diff] [blame] | 280 | nilfs_transaction_abort(inode->i_sb); |
Christoph Hellwig | 155130a | 2010-06-04 11:29:58 +0200 | [diff] [blame] | 281 | } |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 282 | return err; |
| 283 | } |
| 284 | |
| 285 | static int nilfs_write_end(struct file *file, struct address_space *mapping, |
| 286 | loff_t pos, unsigned len, unsigned copied, |
| 287 | struct page *page, void *fsdata) |
| 288 | { |
| 289 | struct inode *inode = mapping->host; |
Ryusuke Konishi | 0c6c44c | 2016-05-23 16:23:39 -0700 | [diff] [blame] | 290 | unsigned int start = pos & (PAGE_SIZE - 1); |
| 291 | unsigned int nr_dirty; |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 292 | int err; |
| 293 | |
| 294 | nr_dirty = nilfs_page_count_clean_buffers(page, start, |
| 295 | start + copied); |
| 296 | copied = generic_write_end(file, mapping, pos, len, copied, page, |
| 297 | fsdata); |
Ryusuke Konishi | bcbc8c6 | 2010-12-27 00:05:49 +0900 | [diff] [blame] | 298 | nilfs_set_file_dirty(inode, nr_dirty); |
Ryusuke Konishi | 47420c7 | 2009-04-06 19:01:45 -0700 | [diff] [blame] | 299 | err = nilfs_transaction_commit(inode->i_sb); |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 300 | return err ? : copied; |
| 301 | } |
| 302 | |
| 303 | static ssize_t |
Christoph Hellwig | c8b8e32 | 2016-04-07 08:51:58 -0700 | [diff] [blame] | 304 | nilfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter) |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 305 | { |
Al Viro | 6b6dabc | 2015-06-21 01:37:24 -0400 | [diff] [blame] | 306 | struct inode *inode = file_inode(iocb->ki_filp); |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 307 | |
Omar Sandoval | 6f67376 | 2015-03-16 04:33:52 -0700 | [diff] [blame] | 308 | if (iov_iter_rw(iter) == WRITE) |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 309 | return 0; |
| 310 | |
| 311 | /* Needs synchronization with the cleaner */ |
Christoph Hellwig | c8b8e32 | 2016-04-07 08:51:58 -0700 | [diff] [blame] | 312 | return blockdev_direct_IO(iocb, inode, iter, nilfs_get_block); |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 313 | } |
| 314 | |
Alexey Dobriyan | 7f09410 | 2009-09-21 17:01:10 -0700 | [diff] [blame] | 315 | const struct address_space_operations nilfs_aops = { |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 316 | .writepage = nilfs_writepage, |
| 317 | .readpage = nilfs_readpage, |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 318 | .writepages = nilfs_writepages, |
| 319 | .set_page_dirty = nilfs_set_page_dirty, |
| 320 | .readpages = nilfs_readpages, |
| 321 | .write_begin = nilfs_write_begin, |
| 322 | .write_end = nilfs_write_end, |
| 323 | /* .releasepage = nilfs_releasepage, */ |
| 324 | .invalidatepage = block_invalidatepage, |
| 325 | .direct_IO = nilfs_direct_IO, |
Hisashi Hifumi | 258ef67 | 2009-05-13 11:19:40 +0900 | [diff] [blame] | 326 | .is_partially_uptodate = block_is_partially_uptodate, |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 327 | }; |
| 328 | |
Ryusuke Konishi | 705304a | 2014-12-10 15:54:34 -0800 | [diff] [blame] | 329 | static int nilfs_insert_inode_locked(struct inode *inode, |
| 330 | struct nilfs_root *root, |
| 331 | unsigned long ino) |
| 332 | { |
| 333 | struct nilfs_iget_args args = { |
| 334 | .ino = ino, .root = root, .cno = 0, .for_gc = 0 |
| 335 | }; |
| 336 | |
| 337 | return insert_inode_locked4(inode, ino, nilfs_iget_test, &args); |
| 338 | } |
| 339 | |
Al Viro | c6e49e3 | 2011-07-26 03:07:14 -0400 | [diff] [blame] | 340 | struct inode *nilfs_new_inode(struct inode *dir, umode_t mode) |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 341 | { |
| 342 | struct super_block *sb = dir->i_sb; |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 343 | struct the_nilfs *nilfs = sb->s_fs_info; |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 344 | struct inode *inode; |
| 345 | struct nilfs_inode_info *ii; |
Ryusuke Konishi | 4d8d929 | 2010-08-25 17:45:44 +0900 | [diff] [blame] | 346 | struct nilfs_root *root; |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 347 | int err = -ENOMEM; |
| 348 | ino_t ino; |
| 349 | |
| 350 | inode = new_inode(sb); |
| 351 | if (unlikely(!inode)) |
| 352 | goto failed; |
| 353 | |
| 354 | mapping_set_gfp_mask(inode->i_mapping, |
Michal Hocko | c62d255 | 2015-11-06 16:28:49 -0800 | [diff] [blame] | 355 | mapping_gfp_constraint(inode->i_mapping, ~__GFP_FS)); |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 356 | |
Ryusuke Konishi | 4d8d929 | 2010-08-25 17:45:44 +0900 | [diff] [blame] | 357 | root = NILFS_I(dir)->i_root; |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 358 | ii = NILFS_I(inode); |
Ryusuke Konishi | 4ce5c34 | 2016-08-02 14:05:28 -0700 | [diff] [blame] | 359 | ii->i_state = BIT(NILFS_I_NEW); |
Ryusuke Konishi | 4d8d929 | 2010-08-25 17:45:44 +0900 | [diff] [blame] | 360 | ii->i_root = root; |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 361 | |
Ryusuke Konishi | e912a5b | 2010-08-14 13:07:15 +0900 | [diff] [blame] | 362 | err = nilfs_ifile_create_inode(root->ifile, &ino, &ii->i_bh); |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 363 | if (unlikely(err)) |
| 364 | goto failed_ifile_create_inode; |
| 365 | /* reference count of i_bh inherits from nilfs_mdt_read_block() */ |
| 366 | |
Vyacheslav Dubeyko | e5f7f84 | 2013-07-03 15:08:06 -0700 | [diff] [blame] | 367 | atomic64_inc(&root->inodes_count); |
Dmitry Monakhov | 73459dc | 2010-03-04 17:32:15 +0300 | [diff] [blame] | 368 | inode_init_owner(inode, dir, mode); |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 369 | inode->i_ino = ino; |
| 370 | inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME; |
| 371 | |
| 372 | if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) { |
| 373 | err = nilfs_bmap_read(ii->i_bmap, NULL); |
| 374 | if (err < 0) |
Ryusuke Konishi | 705304a | 2014-12-10 15:54:34 -0800 | [diff] [blame] | 375 | goto failed_after_creation; |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 376 | |
| 377 | set_bit(NILFS_I_BMAP, &ii->i_state); |
| 378 | /* No lock is needed; iget() ensures it. */ |
| 379 | } |
| 380 | |
Ryusuke Konishi | b253a3e | 2011-01-20 02:09:53 +0900 | [diff] [blame] | 381 | ii->i_flags = nilfs_mask_flags( |
| 382 | mode, NILFS_I(dir)->i_flags & NILFS_FL_INHERITED); |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 383 | |
| 384 | /* ii->i_file_acl = 0; */ |
| 385 | /* ii->i_dir_acl = 0; */ |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 386 | ii->i_dir_start_lookup = 0; |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 387 | nilfs_set_inode_flags(inode); |
Ryusuke Konishi | 9b1fc4e4 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 388 | spin_lock(&nilfs->ns_next_gen_lock); |
| 389 | inode->i_generation = nilfs->ns_next_generation++; |
| 390 | spin_unlock(&nilfs->ns_next_gen_lock); |
Ryusuke Konishi | 705304a | 2014-12-10 15:54:34 -0800 | [diff] [blame] | 391 | if (nilfs_insert_inode_locked(inode, root, ino) < 0) { |
| 392 | err = -EIO; |
| 393 | goto failed_after_creation; |
| 394 | } |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 395 | |
| 396 | err = nilfs_init_acl(inode, dir); |
| 397 | if (unlikely(err)) |
Ryusuke Konishi | 076a378 | 2016-05-23 16:23:48 -0700 | [diff] [blame] | 398 | /* |
| 399 | * Never occur. When supporting nilfs_init_acl(), |
| 400 | * proper cancellation of above jobs should be considered. |
| 401 | */ |
| 402 | goto failed_after_creation; |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 403 | |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 404 | return inode; |
| 405 | |
Ryusuke Konishi | 705304a | 2014-12-10 15:54:34 -0800 | [diff] [blame] | 406 | failed_after_creation: |
Miklos Szeredi | 6d6b77f | 2011-10-28 14:13:28 +0200 | [diff] [blame] | 407 | clear_nlink(inode); |
Ryusuke Konishi | 705304a | 2014-12-10 15:54:34 -0800 | [diff] [blame] | 408 | unlock_new_inode(inode); |
Ryusuke Konishi | 076a378 | 2016-05-23 16:23:48 -0700 | [diff] [blame] | 409 | iput(inode); /* |
| 410 | * raw_inode will be deleted through |
| 411 | * nilfs_evict_inode(). |
| 412 | */ |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 413 | goto failed; |
| 414 | |
| 415 | failed_ifile_create_inode: |
| 416 | make_bad_inode(inode); |
Ryusuke Konishi | 076a378 | 2016-05-23 16:23:48 -0700 | [diff] [blame] | 417 | iput(inode); |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 418 | failed: |
| 419 | return ERR_PTR(err); |
| 420 | } |
| 421 | |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 422 | void nilfs_set_inode_flags(struct inode *inode) |
| 423 | { |
| 424 | unsigned int flags = NILFS_I(inode)->i_flags; |
Ryusuke Konishi | faea2c5 | 2015-04-16 12:46:50 -0700 | [diff] [blame] | 425 | unsigned int new_fl = 0; |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 426 | |
Ryusuke Konishi | f0c9f24 | 2011-01-20 02:09:52 +0900 | [diff] [blame] | 427 | if (flags & FS_SYNC_FL) |
Ryusuke Konishi | faea2c5 | 2015-04-16 12:46:50 -0700 | [diff] [blame] | 428 | new_fl |= S_SYNC; |
Ryusuke Konishi | f0c9f24 | 2011-01-20 02:09:52 +0900 | [diff] [blame] | 429 | if (flags & FS_APPEND_FL) |
Ryusuke Konishi | faea2c5 | 2015-04-16 12:46:50 -0700 | [diff] [blame] | 430 | new_fl |= S_APPEND; |
Ryusuke Konishi | f0c9f24 | 2011-01-20 02:09:52 +0900 | [diff] [blame] | 431 | if (flags & FS_IMMUTABLE_FL) |
Ryusuke Konishi | faea2c5 | 2015-04-16 12:46:50 -0700 | [diff] [blame] | 432 | new_fl |= S_IMMUTABLE; |
Ryusuke Konishi | f0c9f24 | 2011-01-20 02:09:52 +0900 | [diff] [blame] | 433 | if (flags & FS_NOATIME_FL) |
Ryusuke Konishi | faea2c5 | 2015-04-16 12:46:50 -0700 | [diff] [blame] | 434 | new_fl |= S_NOATIME; |
Ryusuke Konishi | f0c9f24 | 2011-01-20 02:09:52 +0900 | [diff] [blame] | 435 | if (flags & FS_DIRSYNC_FL) |
Ryusuke Konishi | faea2c5 | 2015-04-16 12:46:50 -0700 | [diff] [blame] | 436 | new_fl |= S_DIRSYNC; |
| 437 | inode_set_flags(inode, new_fl, S_SYNC | S_APPEND | S_IMMUTABLE | |
| 438 | S_NOATIME | S_DIRSYNC); |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 439 | } |
| 440 | |
| 441 | int nilfs_read_inode_common(struct inode *inode, |
| 442 | struct nilfs_inode *raw_inode) |
| 443 | { |
| 444 | struct nilfs_inode_info *ii = NILFS_I(inode); |
| 445 | int err; |
| 446 | |
| 447 | inode->i_mode = le16_to_cpu(raw_inode->i_mode); |
Eric W. Biederman | 305d3d0 | 2012-02-10 12:31:23 -0800 | [diff] [blame] | 448 | i_uid_write(inode, le32_to_cpu(raw_inode->i_uid)); |
| 449 | i_gid_write(inode, le32_to_cpu(raw_inode->i_gid)); |
Miklos Szeredi | bfe8684 | 2011-10-28 14:13:29 +0200 | [diff] [blame] | 450 | set_nlink(inode, le16_to_cpu(raw_inode->i_links_count)); |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 451 | inode->i_size = le64_to_cpu(raw_inode->i_size); |
| 452 | inode->i_atime.tv_sec = le64_to_cpu(raw_inode->i_mtime); |
| 453 | inode->i_ctime.tv_sec = le64_to_cpu(raw_inode->i_ctime); |
| 454 | inode->i_mtime.tv_sec = le64_to_cpu(raw_inode->i_mtime); |
Ryusuke Konishi | 6123923 | 2009-04-06 19:02:00 -0700 | [diff] [blame] | 455 | inode->i_atime.tv_nsec = le32_to_cpu(raw_inode->i_mtime_nsec); |
| 456 | inode->i_ctime.tv_nsec = le32_to_cpu(raw_inode->i_ctime_nsec); |
| 457 | inode->i_mtime.tv_nsec = le32_to_cpu(raw_inode->i_mtime_nsec); |
Ryusuke Konishi | 705304a | 2014-12-10 15:54:34 -0800 | [diff] [blame] | 458 | if (inode->i_nlink == 0) |
| 459 | return -ESTALE; /* this inode is deleted */ |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 460 | |
| 461 | inode->i_blocks = le64_to_cpu(raw_inode->i_blocks); |
| 462 | ii->i_flags = le32_to_cpu(raw_inode->i_flags); |
| 463 | #if 0 |
| 464 | ii->i_file_acl = le32_to_cpu(raw_inode->i_file_acl); |
| 465 | ii->i_dir_acl = S_ISREG(inode->i_mode) ? |
| 466 | 0 : le32_to_cpu(raw_inode->i_dir_acl); |
| 467 | #endif |
Ryusuke Konishi | 3cc811b | 2009-09-28 13:02:46 +0900 | [diff] [blame] | 468 | ii->i_dir_start_lookup = 0; |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 469 | inode->i_generation = le32_to_cpu(raw_inode->i_generation); |
| 470 | |
| 471 | if (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || |
| 472 | S_ISLNK(inode->i_mode)) { |
| 473 | err = nilfs_bmap_read(ii->i_bmap, raw_inode); |
| 474 | if (err < 0) |
| 475 | return err; |
| 476 | set_bit(NILFS_I_BMAP, &ii->i_state); |
| 477 | /* No lock is needed; iget() ensures it. */ |
| 478 | } |
| 479 | return 0; |
| 480 | } |
| 481 | |
Ryusuke Konishi | e912a5b | 2010-08-14 13:07:15 +0900 | [diff] [blame] | 482 | static int __nilfs_read_inode(struct super_block *sb, |
| 483 | struct nilfs_root *root, unsigned long ino, |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 484 | struct inode *inode) |
| 485 | { |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 486 | struct the_nilfs *nilfs = sb->s_fs_info; |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 487 | struct buffer_head *bh; |
| 488 | struct nilfs_inode *raw_inode; |
| 489 | int err; |
| 490 | |
Ryusuke Konishi | 365e215 | 2010-12-27 00:07:30 +0900 | [diff] [blame] | 491 | down_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); |
Ryusuke Konishi | e912a5b | 2010-08-14 13:07:15 +0900 | [diff] [blame] | 492 | err = nilfs_ifile_get_inode_block(root->ifile, ino, &bh); |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 493 | if (unlikely(err)) |
| 494 | goto bad_inode; |
| 495 | |
Ryusuke Konishi | e912a5b | 2010-08-14 13:07:15 +0900 | [diff] [blame] | 496 | raw_inode = nilfs_ifile_map_inode(root->ifile, ino, bh); |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 497 | |
Ryusuke Konishi | 1b2f5a6 | 2009-08-22 19:10:07 +0900 | [diff] [blame] | 498 | err = nilfs_read_inode_common(inode, raw_inode); |
| 499 | if (err) |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 500 | goto failed_unmap; |
| 501 | |
| 502 | if (S_ISREG(inode->i_mode)) { |
| 503 | inode->i_op = &nilfs_file_inode_operations; |
| 504 | inode->i_fop = &nilfs_file_operations; |
| 505 | inode->i_mapping->a_ops = &nilfs_aops; |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 506 | } else if (S_ISDIR(inode->i_mode)) { |
| 507 | inode->i_op = &nilfs_dir_inode_operations; |
| 508 | inode->i_fop = &nilfs_dir_operations; |
| 509 | inode->i_mapping->a_ops = &nilfs_aops; |
| 510 | } else if (S_ISLNK(inode->i_mode)) { |
| 511 | inode->i_op = &nilfs_symlink_inode_operations; |
Al Viro | 21fc61c | 2015-11-17 01:07:57 -0500 | [diff] [blame] | 512 | inode_nohighmem(inode); |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 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 Konishi | cdce214 | 2010-05-09 15:31:22 +0900 | [diff] [blame] | 518 | huge_decode_dev(le64_to_cpu(raw_inode->i_device_code))); |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 519 | } |
Ryusuke Konishi | e912a5b | 2010-08-14 13:07:15 +0900 | [diff] [blame] | 520 | nilfs_ifile_unmap_inode(root->ifile, ino, bh); |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 521 | brelse(bh); |
Ryusuke Konishi | 365e215 | 2010-12-27 00:07:30 +0900 | [diff] [blame] | 522 | up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 523 | nilfs_set_inode_flags(inode); |
Ryusuke Konishi | 0ce187c | 2015-04-16 12:46:47 -0700 | [diff] [blame] | 524 | mapping_set_gfp_mask(inode->i_mapping, |
Michal Hocko | c62d255 | 2015-11-06 16:28:49 -0800 | [diff] [blame] | 525 | mapping_gfp_constraint(inode->i_mapping, ~__GFP_FS)); |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 526 | return 0; |
| 527 | |
| 528 | failed_unmap: |
Ryusuke Konishi | e912a5b | 2010-08-14 13:07:15 +0900 | [diff] [blame] | 529 | nilfs_ifile_unmap_inode(root->ifile, ino, bh); |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 530 | brelse(bh); |
| 531 | |
| 532 | bad_inode: |
Ryusuke Konishi | 365e215 | 2010-12-27 00:07:30 +0900 | [diff] [blame] | 533 | up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 534 | return err; |
| 535 | } |
| 536 | |
Ryusuke Konishi | 0e14a35 | 2010-08-20 21:20:29 +0900 | [diff] [blame] | 537 | static 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 Konishi | 4d8d929 | 2010-08-25 17:45:44 +0900 | [diff] [blame] | 542 | if (args->ino != inode->i_ino || args->root != NILFS_I(inode)->i_root) |
Ryusuke Konishi | 0e14a35 | 2010-08-20 21:20:29 +0900 | [diff] [blame] | 543 | 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 | |
| 552 | static 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) { |
Ryusuke Konishi | 4ce5c34 | 2016-08-02 14:05:28 -0700 | [diff] [blame] | 558 | NILFS_I(inode)->i_state = BIT(NILFS_I_GCINODE); |
Ryusuke Konishi | 0e14a35 | 2010-08-20 21:20:29 +0900 | [diff] [blame] | 559 | NILFS_I(inode)->i_cno = args->cno; |
Ryusuke Konishi | 4d8d929 | 2010-08-25 17:45:44 +0900 | [diff] [blame] | 560 | 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 Konishi | 0e14a35 | 2010-08-20 21:20:29 +0900 | [diff] [blame] | 565 | } |
| 566 | return 0; |
| 567 | } |
| 568 | |
Ryusuke Konishi | 032dbb3 | 2010-09-13 11:16:34 +0900 | [diff] [blame] | 569 | struct 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 Konishi | f1e89c8 | 2010-09-05 12:20:59 +0900 | [diff] [blame] | 579 | struct inode *nilfs_iget_locked(struct super_block *sb, struct nilfs_root *root, |
| 580 | unsigned long ino) |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 581 | { |
Ryusuke Konishi | 4d8d929 | 2010-08-25 17:45:44 +0900 | [diff] [blame] | 582 | struct nilfs_iget_args args = { |
| 583 | .ino = ino, .root = root, .cno = 0, .for_gc = 0 |
| 584 | }; |
Ryusuke Konishi | f1e89c8 | 2010-09-05 12:20:59 +0900 | [diff] [blame] | 585 | |
| 586 | return iget5_locked(sb, ino, nilfs_iget_test, nilfs_iget_set, &args); |
| 587 | } |
| 588 | |
| 589 | struct inode *nilfs_iget(struct super_block *sb, struct nilfs_root *root, |
| 590 | unsigned long ino) |
| 591 | { |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 592 | struct inode *inode; |
| 593 | int err; |
| 594 | |
Ryusuke Konishi | f1e89c8 | 2010-09-05 12:20:59 +0900 | [diff] [blame] | 595 | inode = nilfs_iget_locked(sb, root, ino); |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 596 | if (unlikely(!inode)) |
| 597 | return ERR_PTR(-ENOMEM); |
| 598 | if (!(inode->i_state & I_NEW)) |
| 599 | return inode; |
| 600 | |
Ryusuke Konishi | e912a5b | 2010-08-14 13:07:15 +0900 | [diff] [blame] | 601 | err = __nilfs_read_inode(sb, root, ino, inode); |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 602 | if (unlikely(err)) { |
| 603 | iget_failed(inode); |
| 604 | return ERR_PTR(err); |
| 605 | } |
| 606 | unlock_new_inode(inode); |
| 607 | return inode; |
| 608 | } |
| 609 | |
Ryusuke Konishi | 263d90c | 2010-08-20 19:06:11 +0900 | [diff] [blame] | 610 | struct inode *nilfs_iget_for_gc(struct super_block *sb, unsigned long ino, |
| 611 | __u64 cno) |
| 612 | { |
Ryusuke Konishi | 4d8d929 | 2010-08-25 17:45:44 +0900 | [diff] [blame] | 613 | struct nilfs_iget_args args = { |
| 614 | .ino = ino, .root = NULL, .cno = cno, .for_gc = 1 |
| 615 | }; |
Ryusuke Konishi | 263d90c | 2010-08-20 19:06:11 +0900 | [diff] [blame] | 616 | 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 Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 634 | void 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. Biederman | 305d3d0 | 2012-02-10 12:31:23 -0800 | [diff] [blame] | 640 | raw_inode->i_uid = cpu_to_le32(i_uid_read(inode)); |
| 641 | raw_inode->i_gid = cpu_to_le32(i_gid_read(inode)); |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 642 | 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 Konishi | 6123923 | 2009-04-06 19:02:00 -0700 | [diff] [blame] | 646 | 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 Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 648 | raw_inode->i_blocks = cpu_to_le64(inode->i_blocks); |
| 649 | |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 650 | raw_inode->i_flags = cpu_to_le32(ii->i_flags); |
| 651 | raw_inode->i_generation = cpu_to_le32(inode->i_generation); |
| 652 | |
Ryusuke Konishi | 56eb553 | 2011-04-30 18:56:12 +0900 | [diff] [blame] | 653 | 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 Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 663 | 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 Konishi | cdce214 | 2010-05-09 15:31:22 +0900 | [diff] [blame] | 667 | cpu_to_le64(huge_encode_dev(inode->i_rdev)); |
Ryusuke Konishi | 076a378 | 2016-05-23 16:23:48 -0700 | [diff] [blame] | 668 | /* |
| 669 | * When extending inode, nilfs->ns_inode_size should be checked |
| 670 | * for substitutions of appended fields. |
| 671 | */ |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 672 | } |
| 673 | |
Andreas Rohner | b9f6614 | 2014-10-13 15:53:22 -0700 | [diff] [blame] | 674 | void nilfs_update_inode(struct inode *inode, struct buffer_head *ibh, int flags) |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 675 | { |
| 676 | ino_t ino = inode->i_ino; |
| 677 | struct nilfs_inode_info *ii = NILFS_I(inode); |
Ryusuke Konishi | e912a5b | 2010-08-14 13:07:15 +0900 | [diff] [blame] | 678 | struct inode *ifile = ii->i_root->ifile; |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 679 | struct nilfs_inode *raw_inode; |
| 680 | |
Ryusuke Konishi | e912a5b | 2010-08-14 13:07:15 +0900 | [diff] [blame] | 681 | raw_inode = nilfs_ifile_map_inode(ifile, ino, ibh); |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 682 | |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 683 | if (test_and_clear_bit(NILFS_I_NEW, &ii->i_state)) |
Ryusuke Konishi | e912a5b | 2010-08-14 13:07:15 +0900 | [diff] [blame] | 684 | memset(raw_inode, 0, NILFS_MDT(ifile)->mi_entry_size); |
Andreas Rohner | b9f6614 | 2014-10-13 15:53:22 -0700 | [diff] [blame] | 685 | if (flags & I_DIRTY_DATASYNC) |
| 686 | set_bit(NILFS_I_INODE_SYNC, &ii->i_state); |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 687 | |
| 688 | nilfs_write_inode_common(inode, raw_inode, 0); |
Ryusuke Konishi | 076a378 | 2016-05-23 16:23:48 -0700 | [diff] [blame] | 689 | /* |
| 690 | * XXX: call with has_bmap = 0 is a workaround to avoid |
| 691 | * deadlock of bmap. This delays update of i_bmap to just |
| 692 | * before writing. |
| 693 | */ |
| 694 | |
Ryusuke Konishi | e912a5b | 2010-08-14 13:07:15 +0900 | [diff] [blame] | 695 | nilfs_ifile_unmap_inode(ifile, ino, ibh); |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 696 | } |
| 697 | |
| 698 | #define NILFS_MAX_TRUNCATE_BLOCKS 16384 /* 64MB for 4KB block */ |
| 699 | |
| 700 | static void nilfs_truncate_bmap(struct nilfs_inode_info *ii, |
| 701 | unsigned long from) |
| 702 | { |
Ryusuke Konishi | 3568a13 | 2015-04-16 12:46:34 -0700 | [diff] [blame] | 703 | __u64 b; |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 704 | int ret; |
| 705 | |
| 706 | if (!test_bit(NILFS_I_BMAP, &ii->i_state)) |
| 707 | return; |
Ryusuke Konishi | e828949 | 2010-11-19 15:26:20 +0900 | [diff] [blame] | 708 | repeat: |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 709 | ret = nilfs_bmap_last_key(ii->i_bmap, &b); |
| 710 | if (ret == -ENOENT) |
| 711 | return; |
| 712 | else if (ret < 0) |
| 713 | goto failed; |
| 714 | |
| 715 | if (b < from) |
| 716 | return; |
| 717 | |
Ryusuke Konishi | 3568a13 | 2015-04-16 12:46:34 -0700 | [diff] [blame] | 718 | b -= min_t(__u64, NILFS_MAX_TRUNCATE_BLOCKS, b - from); |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 719 | ret = nilfs_bmap_truncate(ii->i_bmap, b); |
| 720 | nilfs_relax_pressure_in_lock(ii->vfs_inode.i_sb); |
| 721 | if (!ret || (ret == -ENOMEM && |
| 722 | nilfs_bmap_truncate(ii->i_bmap, b) == 0)) |
| 723 | goto repeat; |
| 724 | |
Ryusuke Konishi | e828949 | 2010-11-19 15:26:20 +0900 | [diff] [blame] | 725 | failed: |
Ryusuke Konishi | d6517de | 2016-08-02 14:05:14 -0700 | [diff] [blame] | 726 | nilfs_msg(ii->vfs_inode.i_sb, KERN_WARNING, |
| 727 | "error %d truncating bmap (ino=%lu)", ret, |
| 728 | ii->vfs_inode.i_ino); |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 729 | } |
| 730 | |
| 731 | void nilfs_truncate(struct inode *inode) |
| 732 | { |
| 733 | unsigned long blkoff; |
| 734 | unsigned int blocksize; |
| 735 | struct nilfs_transaction_info ti; |
| 736 | struct super_block *sb = inode->i_sb; |
| 737 | struct nilfs_inode_info *ii = NILFS_I(inode); |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 738 | |
| 739 | if (!test_bit(NILFS_I_BMAP, &ii->i_state)) |
| 740 | return; |
| 741 | if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) |
| 742 | return; |
| 743 | |
| 744 | blocksize = sb->s_blocksize; |
| 745 | blkoff = (inode->i_size + blocksize - 1) >> sb->s_blocksize_bits; |
Ryusuke Konishi | 1f5abe7 | 2009-04-06 19:01:55 -0700 | [diff] [blame] | 746 | nilfs_transaction_begin(sb, &ti, 0); /* never fails */ |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 747 | |
| 748 | block_truncate_page(inode->i_mapping, inode->i_size, nilfs_get_block); |
| 749 | |
| 750 | nilfs_truncate_bmap(ii, blkoff); |
| 751 | |
| 752 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; |
| 753 | if (IS_SYNC(inode)) |
| 754 | nilfs_set_transaction_flag(NILFS_TI_SYNC); |
| 755 | |
Jiro SEKIBA | abdb318 | 2009-11-27 19:41:14 +0900 | [diff] [blame] | 756 | nilfs_mark_inode_dirty(inode); |
Ryusuke Konishi | bcbc8c6 | 2010-12-27 00:05:49 +0900 | [diff] [blame] | 757 | nilfs_set_file_dirty(inode, 0); |
Ryusuke Konishi | 47420c7 | 2009-04-06 19:01:45 -0700 | [diff] [blame] | 758 | nilfs_transaction_commit(sb); |
Ryusuke Konishi | 076a378 | 2016-05-23 16:23:48 -0700 | [diff] [blame] | 759 | /* |
| 760 | * May construct a logical segment and may fail in sync mode. |
| 761 | * But truncate has no return value. |
| 762 | */ |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 763 | } |
| 764 | |
Al Viro | 6fd1e5c | 2010-06-07 11:55:00 -0400 | [diff] [blame] | 765 | static void nilfs_clear_inode(struct inode *inode) |
| 766 | { |
| 767 | struct nilfs_inode_info *ii = NILFS_I(inode); |
| 768 | |
| 769 | /* |
| 770 | * Free resources allocated in nilfs_read_inode(), here. |
| 771 | */ |
| 772 | BUG_ON(!list_empty(&ii->i_dirty)); |
| 773 | brelse(ii->i_bh); |
| 774 | ii->i_bh = NULL; |
| 775 | |
Ryusuke Konishi | 2d19961 | 2016-05-23 16:23:20 -0700 | [diff] [blame] | 776 | if (nilfs_is_metadata_file_inode(inode)) |
| 777 | nilfs_mdt_clear(inode); |
Ryusuke Konishi | 518d1a6 | 2010-08-20 23:40:54 +0900 | [diff] [blame] | 778 | |
Al Viro | 6fd1e5c | 2010-06-07 11:55:00 -0400 | [diff] [blame] | 779 | if (test_bit(NILFS_I_BMAP, &ii->i_state)) |
| 780 | nilfs_bmap_clear(ii->i_bmap); |
| 781 | |
| 782 | nilfs_btnode_cache_clear(&ii->i_btnode_cache); |
Ryusuke Konishi | 4d8d929 | 2010-08-25 17:45:44 +0900 | [diff] [blame] | 783 | |
| 784 | if (ii->i_root && inode->i_ino == NILFS_ROOT_INO) |
| 785 | nilfs_put_root(ii->i_root); |
Al Viro | 6fd1e5c | 2010-06-07 11:55:00 -0400 | [diff] [blame] | 786 | } |
| 787 | |
| 788 | void nilfs_evict_inode(struct inode *inode) |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 789 | { |
| 790 | struct nilfs_transaction_info ti; |
| 791 | struct super_block *sb = inode->i_sb; |
| 792 | struct nilfs_inode_info *ii = NILFS_I(inode); |
Ryusuke Konishi | 25b18d3 | 2011-02-11 15:23:27 +0900 | [diff] [blame] | 793 | int ret; |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 794 | |
Ryusuke Konishi | 4d8d929 | 2010-08-25 17:45:44 +0900 | [diff] [blame] | 795 | if (inode->i_nlink || !ii->i_root || unlikely(is_bad_inode(inode))) { |
Johannes Weiner | 91b0abe | 2014-04-03 14:47:49 -0700 | [diff] [blame] | 796 | truncate_inode_pages_final(&inode->i_data); |
Jan Kara | dbd5768 | 2012-05-03 14:48:02 +0200 | [diff] [blame] | 797 | clear_inode(inode); |
Al Viro | 6fd1e5c | 2010-06-07 11:55:00 -0400 | [diff] [blame] | 798 | nilfs_clear_inode(inode); |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 799 | return; |
| 800 | } |
Ryusuke Konishi | 1f5abe7 | 2009-04-06 19:01:55 -0700 | [diff] [blame] | 801 | nilfs_transaction_begin(sb, &ti, 0); /* never fails */ |
| 802 | |
Johannes Weiner | 91b0abe | 2014-04-03 14:47:49 -0700 | [diff] [blame] | 803 | truncate_inode_pages_final(&inode->i_data); |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 804 | |
Ryusuke Konishi | e912a5b | 2010-08-14 13:07:15 +0900 | [diff] [blame] | 805 | /* TODO: some of the following operations may fail. */ |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 806 | nilfs_truncate_bmap(ii, 0); |
Jiro SEKIBA | abdb318 | 2009-11-27 19:41:14 +0900 | [diff] [blame] | 807 | nilfs_mark_inode_dirty(inode); |
Jan Kara | dbd5768 | 2012-05-03 14:48:02 +0200 | [diff] [blame] | 808 | clear_inode(inode); |
Ryusuke Konishi | e912a5b | 2010-08-14 13:07:15 +0900 | [diff] [blame] | 809 | |
Ryusuke Konishi | 25b18d3 | 2011-02-11 15:23:27 +0900 | [diff] [blame] | 810 | ret = nilfs_ifile_delete_inode(ii->i_root->ifile, inode->i_ino); |
| 811 | if (!ret) |
Vyacheslav Dubeyko | e5f7f84 | 2013-07-03 15:08:06 -0700 | [diff] [blame] | 812 | atomic64_dec(&ii->i_root->inodes_count); |
Ryusuke Konishi | e912a5b | 2010-08-14 13:07:15 +0900 | [diff] [blame] | 813 | |
Al Viro | 6fd1e5c | 2010-06-07 11:55:00 -0400 | [diff] [blame] | 814 | nilfs_clear_inode(inode); |
Ryusuke Konishi | e912a5b | 2010-08-14 13:07:15 +0900 | [diff] [blame] | 815 | |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 816 | if (IS_SYNC(inode)) |
| 817 | nilfs_set_transaction_flag(NILFS_TI_SYNC); |
Ryusuke Konishi | 47420c7 | 2009-04-06 19:01:45 -0700 | [diff] [blame] | 818 | nilfs_transaction_commit(sb); |
Ryusuke Konishi | 076a378 | 2016-05-23 16:23:48 -0700 | [diff] [blame] | 819 | /* |
| 820 | * May construct a logical segment and may fail in sync mode. |
| 821 | * But delete_inode has no return value. |
| 822 | */ |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 823 | } |
| 824 | |
| 825 | int nilfs_setattr(struct dentry *dentry, struct iattr *iattr) |
| 826 | { |
| 827 | struct nilfs_transaction_info ti; |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 828 | struct inode *inode = d_inode(dentry); |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 829 | struct super_block *sb = inode->i_sb; |
Ryusuke Konishi | 47420c7 | 2009-04-06 19:01:45 -0700 | [diff] [blame] | 830 | int err; |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 831 | |
| 832 | err = inode_change_ok(inode, iattr); |
| 833 | if (err) |
| 834 | return err; |
| 835 | |
| 836 | err = nilfs_transaction_begin(sb, &ti, 0); |
| 837 | if (unlikely(err)) |
| 838 | return err; |
Ryusuke Konishi | 47420c7 | 2009-04-06 19:01:45 -0700 | [diff] [blame] | 839 | |
Christoph Hellwig | 1025774 | 2010-06-04 11:30:02 +0200 | [diff] [blame] | 840 | if ((iattr->ia_valid & ATTR_SIZE) && |
| 841 | iattr->ia_size != i_size_read(inode)) { |
Christoph Hellwig | 562c72a | 2011-06-24 14:29:45 -0400 | [diff] [blame] | 842 | inode_dio_wait(inode); |
Marco Stornelli | 2d1b399 | 2012-12-15 11:57:37 +0100 | [diff] [blame] | 843 | truncate_setsize(inode, iattr->ia_size); |
| 844 | nilfs_truncate(inode); |
Christoph Hellwig | 1025774 | 2010-06-04 11:30:02 +0200 | [diff] [blame] | 845 | } |
| 846 | |
| 847 | setattr_copy(inode, iattr); |
| 848 | mark_inode_dirty(inode); |
| 849 | |
| 850 | if (iattr->ia_valid & ATTR_MODE) { |
| 851 | err = nilfs_acl_chmod(inode); |
| 852 | if (unlikely(err)) |
| 853 | goto out_err; |
| 854 | } |
| 855 | |
| 856 | return nilfs_transaction_commit(sb); |
| 857 | |
| 858 | out_err: |
| 859 | nilfs_transaction_abort(sb); |
Ryusuke Konishi | 47420c7 | 2009-04-06 19:01:45 -0700 | [diff] [blame] | 860 | return err; |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 861 | } |
| 862 | |
Al Viro | 10556cb | 2011-06-20 19:28:19 -0400 | [diff] [blame] | 863 | int nilfs_permission(struct inode *inode, int mask) |
Ryusuke Konishi | dc3d3b8 | 2010-08-15 23:33:57 +0900 | [diff] [blame] | 864 | { |
Al Viro | 730e908 | 2011-06-18 20:21:44 -0400 | [diff] [blame] | 865 | struct nilfs_root *root = NILFS_I(inode)->i_root; |
Ryusuke Konishi | 4ad364c | 2016-05-23 16:23:25 -0700 | [diff] [blame] | 866 | |
Ryusuke Konishi | dc3d3b8 | 2010-08-15 23:33:57 +0900 | [diff] [blame] | 867 | if ((mask & MAY_WRITE) && root && |
| 868 | root->cno != NILFS_CPTREE_CURRENT_CNO) |
| 869 | return -EROFS; /* snapshot is not writable */ |
| 870 | |
Al Viro | 2830ba7 | 2011-06-20 19:16:29 -0400 | [diff] [blame] | 871 | return generic_permission(inode, mask); |
Ryusuke Konishi | dc3d3b8 | 2010-08-15 23:33:57 +0900 | [diff] [blame] | 872 | } |
| 873 | |
Ryusuke Konishi | bcbc8c6 | 2010-12-27 00:05:49 +0900 | [diff] [blame] | 874 | int nilfs_load_inode_block(struct inode *inode, struct buffer_head **pbh) |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 875 | { |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 876 | struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 877 | struct nilfs_inode_info *ii = NILFS_I(inode); |
| 878 | int err; |
| 879 | |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 880 | spin_lock(&nilfs->ns_inode_lock); |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 881 | if (ii->i_bh == NULL) { |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 882 | spin_unlock(&nilfs->ns_inode_lock); |
Ryusuke Konishi | e912a5b | 2010-08-14 13:07:15 +0900 | [diff] [blame] | 883 | err = nilfs_ifile_get_inode_block(ii->i_root->ifile, |
| 884 | inode->i_ino, pbh); |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 885 | if (unlikely(err)) |
| 886 | return err; |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 887 | spin_lock(&nilfs->ns_inode_lock); |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 888 | if (ii->i_bh == NULL) |
| 889 | ii->i_bh = *pbh; |
| 890 | else { |
| 891 | brelse(*pbh); |
| 892 | *pbh = ii->i_bh; |
| 893 | } |
| 894 | } else |
| 895 | *pbh = ii->i_bh; |
| 896 | |
| 897 | get_bh(*pbh); |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 898 | spin_unlock(&nilfs->ns_inode_lock); |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 899 | return 0; |
| 900 | } |
| 901 | |
| 902 | int nilfs_inode_dirty(struct inode *inode) |
| 903 | { |
| 904 | struct nilfs_inode_info *ii = NILFS_I(inode); |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 905 | struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 906 | int ret = 0; |
| 907 | |
| 908 | if (!list_empty(&ii->i_dirty)) { |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 909 | spin_lock(&nilfs->ns_inode_lock); |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 910 | ret = test_bit(NILFS_I_DIRTY, &ii->i_state) || |
| 911 | test_bit(NILFS_I_BUSY, &ii->i_state); |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 912 | spin_unlock(&nilfs->ns_inode_lock); |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 913 | } |
| 914 | return ret; |
| 915 | } |
| 916 | |
Ryusuke Konishi | 0c6c44c | 2016-05-23 16:23:39 -0700 | [diff] [blame] | 917 | int nilfs_set_file_dirty(struct inode *inode, unsigned int nr_dirty) |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 918 | { |
| 919 | struct nilfs_inode_info *ii = NILFS_I(inode); |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 920 | struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 921 | |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 922 | atomic_add(nr_dirty, &nilfs->ns_ndirtyblks); |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 923 | |
Ryusuke Konishi | 458c5b0 | 2009-04-06 19:01:56 -0700 | [diff] [blame] | 924 | if (test_and_set_bit(NILFS_I_DIRTY, &ii->i_state)) |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 925 | return 0; |
| 926 | |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 927 | spin_lock(&nilfs->ns_inode_lock); |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 928 | if (!test_bit(NILFS_I_QUEUED, &ii->i_state) && |
| 929 | !test_bit(NILFS_I_BUSY, &ii->i_state)) { |
Ryusuke Konishi | 076a378 | 2016-05-23 16:23:48 -0700 | [diff] [blame] | 930 | /* |
| 931 | * Because this routine may race with nilfs_dispose_list(), |
| 932 | * we have to check NILFS_I_QUEUED here, too. |
| 933 | */ |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 934 | if (list_empty(&ii->i_dirty) && igrab(inode) == NULL) { |
Ryusuke Konishi | 076a378 | 2016-05-23 16:23:48 -0700 | [diff] [blame] | 935 | /* |
| 936 | * This will happen when somebody is freeing |
| 937 | * this inode. |
| 938 | */ |
Ryusuke Konishi | d6517de | 2016-08-02 14:05:14 -0700 | [diff] [blame] | 939 | nilfs_msg(inode->i_sb, KERN_WARNING, |
| 940 | "cannot set file dirty (ino=%lu): the file is being freed", |
| 941 | inode->i_ino); |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 942 | spin_unlock(&nilfs->ns_inode_lock); |
Ryusuke Konishi | 076a378 | 2016-05-23 16:23:48 -0700 | [diff] [blame] | 943 | return -EINVAL; /* |
| 944 | * NILFS_I_DIRTY may remain for |
| 945 | * freeing inode. |
| 946 | */ |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 947 | } |
Nicolas Kaiser | eaae0f3 | 2011-03-19 16:45:30 +0100 | [diff] [blame] | 948 | list_move_tail(&ii->i_dirty, &nilfs->ns_dirty_files); |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 949 | set_bit(NILFS_I_QUEUED, &ii->i_state); |
| 950 | } |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 951 | spin_unlock(&nilfs->ns_inode_lock); |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 952 | return 0; |
| 953 | } |
| 954 | |
Andreas Rohner | b9f6614 | 2014-10-13 15:53:22 -0700 | [diff] [blame] | 955 | int __nilfs_mark_inode_dirty(struct inode *inode, int flags) |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 956 | { |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 957 | struct buffer_head *ibh; |
| 958 | int err; |
| 959 | |
Ryusuke Konishi | bcbc8c6 | 2010-12-27 00:05:49 +0900 | [diff] [blame] | 960 | err = nilfs_load_inode_block(inode, &ibh); |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 961 | if (unlikely(err)) { |
Ryusuke Konishi | d6517de | 2016-08-02 14:05:14 -0700 | [diff] [blame] | 962 | nilfs_msg(inode->i_sb, KERN_WARNING, |
| 963 | "cannot mark inode dirty (ino=%lu): error %d loading inode block", |
| 964 | inode->i_ino, err); |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 965 | return err; |
| 966 | } |
Andreas Rohner | b9f6614 | 2014-10-13 15:53:22 -0700 | [diff] [blame] | 967 | nilfs_update_inode(inode, ibh, flags); |
Ryusuke Konishi | 5fc7b14 | 2011-05-05 12:56:51 +0900 | [diff] [blame] | 968 | mark_buffer_dirty(ibh); |
Ryusuke Konishi | e912a5b | 2010-08-14 13:07:15 +0900 | [diff] [blame] | 969 | nilfs_mdt_mark_dirty(NILFS_I(inode)->i_root->ifile); |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 970 | brelse(ibh); |
| 971 | return 0; |
| 972 | } |
| 973 | |
| 974 | /** |
| 975 | * nilfs_dirty_inode - reflect changes on given inode to an inode block. |
| 976 | * @inode: inode of the file to be registered. |
| 977 | * |
| 978 | * nilfs_dirty_inode() loads a inode block containing the specified |
| 979 | * @inode and copies data from a nilfs_inode to a corresponding inode |
| 980 | * entry in the inode block. This operation is excluded from the segment |
| 981 | * construction. This function can be called both as a single operation |
| 982 | * and as a part of indivisible file operations. |
| 983 | */ |
Christoph Hellwig | aa38572 | 2011-05-27 06:53:02 -0400 | [diff] [blame] | 984 | void nilfs_dirty_inode(struct inode *inode, int flags) |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 985 | { |
| 986 | struct nilfs_transaction_info ti; |
Ryusuke Konishi | 7d6cd92 | 2010-08-21 00:30:39 +0900 | [diff] [blame] | 987 | struct nilfs_mdt_info *mdi = NILFS_MDT(inode); |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 988 | |
| 989 | if (is_bad_inode(inode)) { |
Ryusuke Konishi | d6517de | 2016-08-02 14:05:14 -0700 | [diff] [blame] | 990 | nilfs_msg(inode->i_sb, KERN_WARNING, |
| 991 | "tried to mark bad_inode dirty. ignored."); |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 992 | dump_stack(); |
| 993 | return; |
| 994 | } |
Ryusuke Konishi | 7d6cd92 | 2010-08-21 00:30:39 +0900 | [diff] [blame] | 995 | if (mdi) { |
| 996 | nilfs_mdt_mark_dirty(inode); |
| 997 | return; |
| 998 | } |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 999 | nilfs_transaction_begin(inode->i_sb, &ti, 0); |
Andreas Rohner | b9f6614 | 2014-10-13 15:53:22 -0700 | [diff] [blame] | 1000 | __nilfs_mark_inode_dirty(inode, flags); |
Ryusuke Konishi | 47420c7 | 2009-04-06 19:01:45 -0700 | [diff] [blame] | 1001 | nilfs_transaction_commit(inode->i_sb); /* never fails */ |
Ryusuke Konishi | 05fe58f | 2009-04-06 19:01:32 -0700 | [diff] [blame] | 1002 | } |
Ryusuke Konishi | 622daaff | 2010-12-26 16:38:43 +0900 | [diff] [blame] | 1003 | |
| 1004 | int nilfs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
| 1005 | __u64 start, __u64 len) |
| 1006 | { |
Ryusuke Konishi | 0ef28f9 | 2011-05-05 12:56:51 +0900 | [diff] [blame] | 1007 | struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
Ryusuke Konishi | 622daaff | 2010-12-26 16:38:43 +0900 | [diff] [blame] | 1008 | __u64 logical = 0, phys = 0, size = 0; |
| 1009 | __u32 flags = 0; |
| 1010 | loff_t isize; |
| 1011 | sector_t blkoff, end_blkoff; |
| 1012 | sector_t delalloc_blkoff; |
| 1013 | unsigned long delalloc_blklen; |
| 1014 | unsigned int blkbits = inode->i_blkbits; |
| 1015 | int ret, n; |
| 1016 | |
| 1017 | ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC); |
| 1018 | if (ret) |
| 1019 | return ret; |
| 1020 | |
Al Viro | 5955102 | 2016-01-22 15:40:57 -0500 | [diff] [blame] | 1021 | inode_lock(inode); |
Ryusuke Konishi | 622daaff | 2010-12-26 16:38:43 +0900 | [diff] [blame] | 1022 | |
| 1023 | isize = i_size_read(inode); |
| 1024 | |
| 1025 | blkoff = start >> blkbits; |
| 1026 | end_blkoff = (start + len - 1) >> blkbits; |
| 1027 | |
| 1028 | delalloc_blklen = nilfs_find_uncommitted_extent(inode, blkoff, |
| 1029 | &delalloc_blkoff); |
| 1030 | |
| 1031 | do { |
| 1032 | __u64 blkphy; |
| 1033 | unsigned int maxblocks; |
| 1034 | |
| 1035 | if (delalloc_blklen && blkoff == delalloc_blkoff) { |
| 1036 | if (size) { |
| 1037 | /* End of the current extent */ |
| 1038 | ret = fiemap_fill_next_extent( |
| 1039 | fieinfo, logical, phys, size, flags); |
| 1040 | if (ret) |
| 1041 | break; |
| 1042 | } |
| 1043 | if (blkoff > end_blkoff) |
| 1044 | break; |
| 1045 | |
| 1046 | flags = FIEMAP_EXTENT_MERGED | FIEMAP_EXTENT_DELALLOC; |
| 1047 | logical = blkoff << blkbits; |
| 1048 | phys = 0; |
| 1049 | size = delalloc_blklen << blkbits; |
| 1050 | |
| 1051 | blkoff = delalloc_blkoff + delalloc_blklen; |
| 1052 | delalloc_blklen = nilfs_find_uncommitted_extent( |
| 1053 | inode, blkoff, &delalloc_blkoff); |
| 1054 | continue; |
| 1055 | } |
| 1056 | |
| 1057 | /* |
| 1058 | * Limit the number of blocks that we look up so as |
| 1059 | * not to get into the next delayed allocation extent. |
| 1060 | */ |
| 1061 | maxblocks = INT_MAX; |
| 1062 | if (delalloc_blklen) |
| 1063 | maxblocks = min_t(sector_t, delalloc_blkoff - blkoff, |
| 1064 | maxblocks); |
| 1065 | blkphy = 0; |
| 1066 | |
| 1067 | down_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); |
| 1068 | n = nilfs_bmap_lookup_contig( |
| 1069 | NILFS_I(inode)->i_bmap, blkoff, &blkphy, maxblocks); |
| 1070 | up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); |
| 1071 | |
| 1072 | if (n < 0) { |
| 1073 | int past_eof; |
| 1074 | |
| 1075 | if (unlikely(n != -ENOENT)) |
| 1076 | break; /* error */ |
| 1077 | |
| 1078 | /* HOLE */ |
| 1079 | blkoff++; |
| 1080 | past_eof = ((blkoff << blkbits) >= isize); |
| 1081 | |
| 1082 | if (size) { |
| 1083 | /* End of the current extent */ |
| 1084 | |
| 1085 | if (past_eof) |
| 1086 | flags |= FIEMAP_EXTENT_LAST; |
| 1087 | |
| 1088 | ret = fiemap_fill_next_extent( |
| 1089 | fieinfo, logical, phys, size, flags); |
| 1090 | if (ret) |
| 1091 | break; |
| 1092 | size = 0; |
| 1093 | } |
| 1094 | if (blkoff > end_blkoff || past_eof) |
| 1095 | break; |
| 1096 | } else { |
| 1097 | if (size) { |
| 1098 | if (phys && blkphy << blkbits == phys + size) { |
| 1099 | /* The current extent goes on */ |
| 1100 | size += n << blkbits; |
| 1101 | } else { |
| 1102 | /* Terminate the current extent */ |
| 1103 | ret = fiemap_fill_next_extent( |
| 1104 | fieinfo, logical, phys, size, |
| 1105 | flags); |
| 1106 | if (ret || blkoff > end_blkoff) |
| 1107 | break; |
| 1108 | |
| 1109 | /* Start another extent */ |
| 1110 | flags = FIEMAP_EXTENT_MERGED; |
| 1111 | logical = blkoff << blkbits; |
| 1112 | phys = blkphy << blkbits; |
| 1113 | size = n << blkbits; |
| 1114 | } |
| 1115 | } else { |
| 1116 | /* Start a new extent */ |
| 1117 | flags = FIEMAP_EXTENT_MERGED; |
| 1118 | logical = blkoff << blkbits; |
| 1119 | phys = blkphy << blkbits; |
| 1120 | size = n << blkbits; |
| 1121 | } |
| 1122 | blkoff += n; |
| 1123 | } |
| 1124 | cond_resched(); |
| 1125 | } while (true); |
| 1126 | |
| 1127 | /* If ret is 1 then we just hit the end of the extent array */ |
| 1128 | if (ret == 1) |
| 1129 | ret = 0; |
| 1130 | |
Al Viro | 5955102 | 2016-01-22 15:40:57 -0500 | [diff] [blame] | 1131 | inode_unlock(inode); |
Ryusuke Konishi | 622daaff | 2010-12-26 16:38:43 +0900 | [diff] [blame] | 1132 | return ret; |
| 1133 | } |