Huajun Li | e18c65b | 2013-11-10 23:13:19 +0800 | [diff] [blame] | 1 | /* |
| 2 | * fs/f2fs/inline.c |
| 3 | * Copyright (c) 2013, Intel Corporation |
| 4 | * Authors: Huajun Li <huajun.li@intel.com> |
| 5 | * Haicheng Li <haicheng.li@intel.com> |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License version 2 as |
| 8 | * published by the Free Software Foundation. |
| 9 | */ |
| 10 | |
| 11 | #include <linux/fs.h> |
| 12 | #include <linux/f2fs_fs.h> |
| 13 | |
| 14 | #include "f2fs.h" |
Jaegeuk Kim | 67f8cf3 | 2015-10-15 11:34:49 -0700 | [diff] [blame] | 15 | #include "node.h" |
Huajun Li | e18c65b | 2013-11-10 23:13:19 +0800 | [diff] [blame] | 16 | |
Jaegeuk Kim | 01b960e | 2015-04-23 10:27:21 -0700 | [diff] [blame] | 17 | bool f2fs_may_inline_data(struct inode *inode) |
Huajun Li | e18c65b | 2013-11-10 23:13:19 +0800 | [diff] [blame] | 18 | { |
Jaegeuk Kim | 88b88a6 | 2014-10-06 17:39:50 -0700 | [diff] [blame] | 19 | if (f2fs_is_atomic_file(inode)) |
| 20 | return false; |
| 21 | |
Wanpeng Li | 368a0e4 | 2015-03-19 13:23:48 +0800 | [diff] [blame] | 22 | if (!S_ISREG(inode->i_mode) && !S_ISLNK(inode->i_mode)) |
Huajun Li | e18c65b | 2013-11-10 23:13:19 +0800 | [diff] [blame] | 23 | return false; |
| 24 | |
Jaegeuk Kim | 92dffd0 | 2014-11-11 14:10:01 -0800 | [diff] [blame] | 25 | if (i_size_read(inode) > MAX_INLINE_DATA) |
| 26 | return false; |
| 27 | |
Jaegeuk Kim | fcc85a4 | 2015-04-21 20:39:58 -0700 | [diff] [blame] | 28 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) |
| 29 | return false; |
| 30 | |
Huajun Li | e18c65b | 2013-11-10 23:13:19 +0800 | [diff] [blame] | 31 | return true; |
| 32 | } |
| 33 | |
Jaegeuk Kim | 01b960e | 2015-04-23 10:27:21 -0700 | [diff] [blame] | 34 | bool f2fs_may_inline_dentry(struct inode *inode) |
| 35 | { |
| 36 | if (!test_opt(F2FS_I_SB(inode), INLINE_DENTRY)) |
| 37 | return false; |
| 38 | |
| 39 | if (!S_ISDIR(inode->i_mode)) |
| 40 | return false; |
| 41 | |
| 42 | return true; |
| 43 | } |
| 44 | |
Jaegeuk Kim | b3d208f | 2014-10-23 19:48:09 -0700 | [diff] [blame] | 45 | void read_inline_data(struct page *page, struct page *ipage) |
Huajun Li | e18c65b | 2013-11-10 23:13:19 +0800 | [diff] [blame] | 46 | { |
Huajun Li | e18c65b | 2013-11-10 23:13:19 +0800 | [diff] [blame] | 47 | void *src_addr, *dst_addr; |
| 48 | |
Jaegeuk Kim | b3d208f | 2014-10-23 19:48:09 -0700 | [diff] [blame] | 49 | if (PageUptodate(page)) |
| 50 | return; |
Chao Yu | 04a17fb | 2013-12-30 18:36:23 +0800 | [diff] [blame] | 51 | |
Jaegeuk Kim | b3d208f | 2014-10-23 19:48:09 -0700 | [diff] [blame] | 52 | f2fs_bug_on(F2FS_P_SB(page), page->index); |
Huajun Li | e18c65b | 2013-11-10 23:13:19 +0800 | [diff] [blame] | 53 | |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame^] | 54 | zero_user_segment(page, MAX_INLINE_DATA, PAGE_SIZE); |
Huajun Li | e18c65b | 2013-11-10 23:13:19 +0800 | [diff] [blame] | 55 | |
| 56 | /* Copy the whole inline data block */ |
| 57 | src_addr = inline_data_addr(ipage); |
Jaegeuk Kim | f1e33a0 | 2014-10-18 23:41:38 -0700 | [diff] [blame] | 58 | dst_addr = kmap_atomic(page); |
Huajun Li | e18c65b | 2013-11-10 23:13:19 +0800 | [diff] [blame] | 59 | memcpy(dst_addr, src_addr, MAX_INLINE_DATA); |
Jaegeuk Kim | 427a45c | 2014-10-26 22:59:27 -0700 | [diff] [blame] | 60 | flush_dcache_page(page); |
Jaegeuk Kim | f1e33a0 | 2014-10-18 23:41:38 -0700 | [diff] [blame] | 61 | kunmap_atomic(dst_addr); |
Huajun Li | e18c65b | 2013-11-10 23:13:19 +0800 | [diff] [blame] | 62 | SetPageUptodate(page); |
Jaegeuk Kim | b3d208f | 2014-10-23 19:48:09 -0700 | [diff] [blame] | 63 | } |
Huajun Li | e18c65b | 2013-11-10 23:13:19 +0800 | [diff] [blame] | 64 | |
Chao Yu | 0bfcfcc | 2015-03-10 13:16:25 +0800 | [diff] [blame] | 65 | bool truncate_inline_inode(struct page *ipage, u64 from) |
Chao Yu | feeb0de | 2015-01-26 20:22:55 +0800 | [diff] [blame] | 66 | { |
Chao Yu | 0bfcfcc | 2015-03-10 13:16:25 +0800 | [diff] [blame] | 67 | void *addr; |
| 68 | |
Chao Yu | 0bfcfcc | 2015-03-10 13:16:25 +0800 | [diff] [blame] | 69 | if (from >= MAX_INLINE_DATA) |
| 70 | return false; |
| 71 | |
| 72 | addr = inline_data_addr(ipage); |
| 73 | |
Jaegeuk Kim | fec1d65 | 2016-01-20 23:43:51 +0800 | [diff] [blame] | 74 | f2fs_wait_on_page_writeback(ipage, NODE, true); |
Chao Yu | 0bfcfcc | 2015-03-10 13:16:25 +0800 | [diff] [blame] | 75 | memset(addr + from, 0, MAX_INLINE_DATA - from); |
| 76 | |
| 77 | return true; |
Chao Yu | feeb0de | 2015-01-26 20:22:55 +0800 | [diff] [blame] | 78 | } |
| 79 | |
Jaegeuk Kim | b3d208f | 2014-10-23 19:48:09 -0700 | [diff] [blame] | 80 | int f2fs_read_inline_data(struct inode *inode, struct page *page) |
| 81 | { |
| 82 | struct page *ipage; |
| 83 | |
| 84 | ipage = get_node_page(F2FS_I_SB(inode), inode->i_ino); |
| 85 | if (IS_ERR(ipage)) { |
| 86 | unlock_page(page); |
| 87 | return PTR_ERR(ipage); |
| 88 | } |
| 89 | |
| 90 | if (!f2fs_has_inline_data(inode)) { |
| 91 | f2fs_put_page(ipage, 1); |
| 92 | return -EAGAIN; |
| 93 | } |
| 94 | |
| 95 | if (page->index) |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame^] | 96 | zero_user_segment(page, 0, PAGE_SIZE); |
Jaegeuk Kim | b3d208f | 2014-10-23 19:48:09 -0700 | [diff] [blame] | 97 | else |
| 98 | read_inline_data(page, ipage); |
| 99 | |
| 100 | SetPageUptodate(page); |
| 101 | f2fs_put_page(ipage, 1); |
| 102 | unlock_page(page); |
Huajun Li | e18c65b | 2013-11-10 23:13:19 +0800 | [diff] [blame] | 103 | return 0; |
| 104 | } |
| 105 | |
Jaegeuk Kim | b3d208f | 2014-10-23 19:48:09 -0700 | [diff] [blame] | 106 | int f2fs_convert_inline_page(struct dnode_of_data *dn, struct page *page) |
Huajun Li | e18c65b | 2013-11-10 23:13:19 +0800 | [diff] [blame] | 107 | { |
Huajun Li | e18c65b | 2013-11-10 23:13:19 +0800 | [diff] [blame] | 108 | struct f2fs_io_info fio = { |
Jaegeuk Kim | 05ca363 | 2015-04-23 14:38:15 -0700 | [diff] [blame] | 109 | .sbi = F2FS_I_SB(dn->inode), |
Huajun Li | e18c65b | 2013-11-10 23:13:19 +0800 | [diff] [blame] | 110 | .type = DATA, |
| 111 | .rw = WRITE_SYNC | REQ_PRIO, |
Jaegeuk Kim | 05ca363 | 2015-04-23 14:38:15 -0700 | [diff] [blame] | 112 | .page = page, |
Jaegeuk Kim | 4375a33 | 2015-04-23 12:04:33 -0700 | [diff] [blame] | 113 | .encrypted_page = NULL, |
Huajun Li | e18c65b | 2013-11-10 23:13:19 +0800 | [diff] [blame] | 114 | }; |
Jaegeuk Kim | 158c194 | 2014-11-25 11:34:02 -0800 | [diff] [blame] | 115 | int dirty, err; |
Huajun Li | e18c65b | 2013-11-10 23:13:19 +0800 | [diff] [blame] | 116 | |
Jaegeuk Kim | b3d208f | 2014-10-23 19:48:09 -0700 | [diff] [blame] | 117 | if (!f2fs_exist_data(dn->inode)) |
| 118 | goto clear_out; |
Jaegeuk Kim | ec4e7af | 2014-08-18 14:41:11 -0700 | [diff] [blame] | 119 | |
Jaegeuk Kim | b3d208f | 2014-10-23 19:48:09 -0700 | [diff] [blame] | 120 | err = f2fs_reserve_block(dn, 0); |
Jaegeuk Kim | 15c6e3a | 2014-04-16 14:22:50 +0900 | [diff] [blame] | 121 | if (err) |
Jaegeuk Kim | b3d208f | 2014-10-23 19:48:09 -0700 | [diff] [blame] | 122 | return err; |
Huajun Li | e18c65b | 2013-11-10 23:13:19 +0800 | [diff] [blame] | 123 | |
Yunlei He | 85ead81 | 2016-02-03 10:26:13 +0800 | [diff] [blame] | 124 | f2fs_bug_on(F2FS_P_SB(page), PageWriteback(page)); |
Jaegeuk Kim | b3d208f | 2014-10-23 19:48:09 -0700 | [diff] [blame] | 125 | |
Shawn Lin | 8060656 | 2016-02-19 16:02:51 +0800 | [diff] [blame] | 126 | read_inline_data(page, dn->inode_page); |
Jaegeuk Kim | 6282adb | 2015-07-25 00:29:17 -0700 | [diff] [blame] | 127 | set_page_dirty(page); |
| 128 | |
Jaegeuk Kim | 158c194 | 2014-11-25 11:34:02 -0800 | [diff] [blame] | 129 | /* clear dirty state */ |
| 130 | dirty = clear_page_dirty_for_io(page); |
| 131 | |
Huajun Li | e18c65b | 2013-11-10 23:13:19 +0800 | [diff] [blame] | 132 | /* write data page to try to make data consistent */ |
| 133 | set_page_writeback(page); |
Chao Yu | 7a9d754 | 2016-02-22 18:36:38 +0800 | [diff] [blame] | 134 | fio.old_blkaddr = dn->data_blkaddr; |
Jaegeuk Kim | 05ca363 | 2015-04-23 14:38:15 -0700 | [diff] [blame] | 135 | write_data_page(dn, &fio); |
Jaegeuk Kim | fec1d65 | 2016-01-20 23:43:51 +0800 | [diff] [blame] | 136 | f2fs_wait_on_page_writeback(page, DATA, true); |
Jaegeuk Kim | 158c194 | 2014-11-25 11:34:02 -0800 | [diff] [blame] | 137 | if (dirty) |
| 138 | inode_dec_dirty_pages(dn->inode); |
Huajun Li | e18c65b | 2013-11-10 23:13:19 +0800 | [diff] [blame] | 139 | |
Jaegeuk Kim | 95f5b0f | 2014-11-25 17:27:38 -0800 | [diff] [blame] | 140 | /* this converted inline_data should be recovered. */ |
| 141 | set_inode_flag(F2FS_I(dn->inode), FI_APPEND_WRITE); |
| 142 | |
Huajun Li | e18c65b | 2013-11-10 23:13:19 +0800 | [diff] [blame] | 143 | /* clear inline data and flag after data writeback */ |
Chao Yu | 0bfcfcc | 2015-03-10 13:16:25 +0800 | [diff] [blame] | 144 | truncate_inline_inode(dn->inode_page, 0); |
Jaegeuk Kim | 2049d4f | 2016-01-25 05:57:05 -0800 | [diff] [blame] | 145 | clear_inline_node(dn->inode_page); |
Jaegeuk Kim | b3d208f | 2014-10-23 19:48:09 -0700 | [diff] [blame] | 146 | clear_out: |
Jaegeuk Kim | b3d208f | 2014-10-23 19:48:09 -0700 | [diff] [blame] | 147 | stat_dec_inline_inode(dn->inode); |
Jaegeuk Kim | 57e2a2c | 2014-11-10 16:29:14 -0800 | [diff] [blame] | 148 | f2fs_clear_inline_inode(dn->inode); |
Jaegeuk Kim | b3d208f | 2014-10-23 19:48:09 -0700 | [diff] [blame] | 149 | sync_inode_page(dn); |
| 150 | f2fs_put_dnode(dn); |
| 151 | return 0; |
Huajun Li | e18c65b | 2013-11-10 23:13:19 +0800 | [diff] [blame] | 152 | } |
| 153 | |
Jaegeuk Kim | b3d208f | 2014-10-23 19:48:09 -0700 | [diff] [blame] | 154 | int f2fs_convert_inline_inode(struct inode *inode) |
Huajun Li | e18c65b | 2013-11-10 23:13:19 +0800 | [diff] [blame] | 155 | { |
Jaegeuk Kim | b3d208f | 2014-10-23 19:48:09 -0700 | [diff] [blame] | 156 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 157 | struct dnode_of_data dn; |
| 158 | struct page *ipage, *page; |
| 159 | int err = 0; |
Huajun Li | e18c65b | 2013-11-10 23:13:19 +0800 | [diff] [blame] | 160 | |
Jaegeuk Kim | b9d777b | 2015-12-22 11:09:35 -0800 | [diff] [blame] | 161 | if (!f2fs_has_inline_data(inode)) |
| 162 | return 0; |
| 163 | |
Jaegeuk Kim | b3d208f | 2014-10-23 19:48:09 -0700 | [diff] [blame] | 164 | page = grab_cache_page(inode->i_mapping, 0); |
| 165 | if (!page) |
| 166 | return -ENOMEM; |
Jaegeuk Kim | 9e09fc8 | 2013-12-27 12:28:59 +0900 | [diff] [blame] | 167 | |
Jaegeuk Kim | b3d208f | 2014-10-23 19:48:09 -0700 | [diff] [blame] | 168 | f2fs_lock_op(sbi); |
| 169 | |
| 170 | ipage = get_node_page(sbi, inode->i_ino); |
| 171 | if (IS_ERR(ipage)) { |
Jaegeuk Kim | 6d20aff | 2014-11-17 16:06:55 -0800 | [diff] [blame] | 172 | err = PTR_ERR(ipage); |
| 173 | goto out; |
Jaegeuk Kim | b067ba1 | 2014-08-07 16:32:25 -0700 | [diff] [blame] | 174 | } |
Huajun Li | e18c65b | 2013-11-10 23:13:19 +0800 | [diff] [blame] | 175 | |
Jaegeuk Kim | b3d208f | 2014-10-23 19:48:09 -0700 | [diff] [blame] | 176 | set_new_dnode(&dn, inode, ipage, ipage, 0); |
| 177 | |
| 178 | if (f2fs_has_inline_data(inode)) |
| 179 | err = f2fs_convert_inline_page(&dn, page); |
| 180 | |
| 181 | f2fs_put_dnode(&dn); |
Jaegeuk Kim | 6d20aff | 2014-11-17 16:06:55 -0800 | [diff] [blame] | 182 | out: |
Jaegeuk Kim | b3d208f | 2014-10-23 19:48:09 -0700 | [diff] [blame] | 183 | f2fs_unlock_op(sbi); |
| 184 | |
| 185 | f2fs_put_page(page, 1); |
Jaegeuk Kim | 2a34076 | 2015-12-22 13:23:35 -0800 | [diff] [blame] | 186 | |
Jaegeuk Kim | 2c4db1a | 2016-01-07 14:15:04 -0800 | [diff] [blame] | 187 | f2fs_balance_fs(sbi, dn.node_changed); |
Jaegeuk Kim | 2a34076 | 2015-12-22 13:23:35 -0800 | [diff] [blame] | 188 | |
Huajun Li | e18c65b | 2013-11-10 23:13:19 +0800 | [diff] [blame] | 189 | return err; |
| 190 | } |
| 191 | |
Jaegeuk Kim | b3d208f | 2014-10-23 19:48:09 -0700 | [diff] [blame] | 192 | int f2fs_write_inline_data(struct inode *inode, struct page *page) |
Huajun Li | e18c65b | 2013-11-10 23:13:19 +0800 | [diff] [blame] | 193 | { |
| 194 | void *src_addr, *dst_addr; |
Huajun Li | e18c65b | 2013-11-10 23:13:19 +0800 | [diff] [blame] | 195 | struct dnode_of_data dn; |
| 196 | int err; |
| 197 | |
| 198 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
| 199 | err = get_dnode_of_data(&dn, 0, LOOKUP_NODE); |
| 200 | if (err) |
| 201 | return err; |
Huajun Li | e18c65b | 2013-11-10 23:13:19 +0800 | [diff] [blame] | 202 | |
Jaegeuk Kim | c08a690 | 2014-10-15 10:16:54 -0700 | [diff] [blame] | 203 | if (!f2fs_has_inline_data(inode)) { |
Jaegeuk Kim | b3d208f | 2014-10-23 19:48:09 -0700 | [diff] [blame] | 204 | f2fs_put_dnode(&dn); |
| 205 | return -EAGAIN; |
Jaegeuk Kim | c08a690 | 2014-10-15 10:16:54 -0700 | [diff] [blame] | 206 | } |
| 207 | |
Jaegeuk Kim | b3d208f | 2014-10-23 19:48:09 -0700 | [diff] [blame] | 208 | f2fs_bug_on(F2FS_I_SB(inode), page->index); |
| 209 | |
Jaegeuk Kim | fec1d65 | 2016-01-20 23:43:51 +0800 | [diff] [blame] | 210 | f2fs_wait_on_page_writeback(dn.inode_page, NODE, true); |
Jaegeuk Kim | f1e33a0 | 2014-10-18 23:41:38 -0700 | [diff] [blame] | 211 | src_addr = kmap_atomic(page); |
Jaegeuk Kim | b3d208f | 2014-10-23 19:48:09 -0700 | [diff] [blame] | 212 | dst_addr = inline_data_addr(dn.inode_page); |
| 213 | memcpy(dst_addr, src_addr, MAX_INLINE_DATA); |
Jaegeuk Kim | f1e33a0 | 2014-10-18 23:41:38 -0700 | [diff] [blame] | 214 | kunmap_atomic(src_addr); |
Huajun Li | e18c65b | 2013-11-10 23:13:19 +0800 | [diff] [blame] | 215 | |
Jaegeuk Kim | fff04f9 | 2014-07-25 07:40:59 -0700 | [diff] [blame] | 216 | set_inode_flag(F2FS_I(inode), FI_APPEND_WRITE); |
Jaegeuk Kim | b3d208f | 2014-10-23 19:48:09 -0700 | [diff] [blame] | 217 | set_inode_flag(F2FS_I(inode), FI_DATA_EXIST); |
| 218 | |
Huajun Li | e18c65b | 2013-11-10 23:13:19 +0800 | [diff] [blame] | 219 | sync_inode_page(&dn); |
Jaegeuk Kim | 2049d4f | 2016-01-25 05:57:05 -0800 | [diff] [blame] | 220 | clear_inline_node(dn.inode_page); |
Huajun Li | e18c65b | 2013-11-10 23:13:19 +0800 | [diff] [blame] | 221 | f2fs_put_dnode(&dn); |
Huajun Li | e18c65b | 2013-11-10 23:13:19 +0800 | [diff] [blame] | 222 | return 0; |
| 223 | } |
Jaegeuk Kim | 1e1bb4b | 2013-12-26 12:49:48 +0900 | [diff] [blame] | 224 | |
Jaegeuk Kim | 0342fd3 | 2014-08-07 16:57:17 -0700 | [diff] [blame] | 225 | bool recover_inline_data(struct inode *inode, struct page *npage) |
Jaegeuk Kim | 1e1bb4b | 2013-12-26 12:49:48 +0900 | [diff] [blame] | 226 | { |
Jaegeuk Kim | 4081363 | 2014-09-02 15:31:18 -0700 | [diff] [blame] | 227 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
Jaegeuk Kim | 1e1bb4b | 2013-12-26 12:49:48 +0900 | [diff] [blame] | 228 | struct f2fs_inode *ri = NULL; |
| 229 | void *src_addr, *dst_addr; |
| 230 | struct page *ipage; |
| 231 | |
| 232 | /* |
| 233 | * The inline_data recovery policy is as follows. |
| 234 | * [prev.] [next] of inline_data flag |
| 235 | * o o -> recover inline_data |
| 236 | * o x -> remove inline_data, and then recover data blocks |
| 237 | * x o -> remove inline_data, and then recover inline_data |
| 238 | * x x -> recover data blocks |
| 239 | */ |
| 240 | if (IS_INODE(npage)) |
| 241 | ri = F2FS_INODE(npage); |
| 242 | |
| 243 | if (f2fs_has_inline_data(inode) && |
Jaegeuk Kim | 0342fd3 | 2014-08-07 16:57:17 -0700 | [diff] [blame] | 244 | ri && (ri->i_inline & F2FS_INLINE_DATA)) { |
Jaegeuk Kim | 1e1bb4b | 2013-12-26 12:49:48 +0900 | [diff] [blame] | 245 | process_inline: |
| 246 | ipage = get_node_page(sbi, inode->i_ino); |
Jaegeuk Kim | 9850cf4 | 2014-09-02 15:52:58 -0700 | [diff] [blame] | 247 | f2fs_bug_on(sbi, IS_ERR(ipage)); |
Jaegeuk Kim | 1e1bb4b | 2013-12-26 12:49:48 +0900 | [diff] [blame] | 248 | |
Jaegeuk Kim | fec1d65 | 2016-01-20 23:43:51 +0800 | [diff] [blame] | 249 | f2fs_wait_on_page_writeback(ipage, NODE, true); |
Jaegeuk Kim | 54b591d | 2014-04-29 17:28:32 +0900 | [diff] [blame] | 250 | |
Jaegeuk Kim | 1e1bb4b | 2013-12-26 12:49:48 +0900 | [diff] [blame] | 251 | src_addr = inline_data_addr(npage); |
| 252 | dst_addr = inline_data_addr(ipage); |
| 253 | memcpy(dst_addr, src_addr, MAX_INLINE_DATA); |
Jaegeuk Kim | b3d208f | 2014-10-23 19:48:09 -0700 | [diff] [blame] | 254 | |
| 255 | set_inode_flag(F2FS_I(inode), FI_INLINE_DATA); |
| 256 | set_inode_flag(F2FS_I(inode), FI_DATA_EXIST); |
| 257 | |
Jaegeuk Kim | 1e1bb4b | 2013-12-26 12:49:48 +0900 | [diff] [blame] | 258 | update_inode(inode, ipage); |
| 259 | f2fs_put_page(ipage, 1); |
Jaegeuk Kim | 0342fd3 | 2014-08-07 16:57:17 -0700 | [diff] [blame] | 260 | return true; |
Jaegeuk Kim | 1e1bb4b | 2013-12-26 12:49:48 +0900 | [diff] [blame] | 261 | } |
| 262 | |
| 263 | if (f2fs_has_inline_data(inode)) { |
| 264 | ipage = get_node_page(sbi, inode->i_ino); |
Jaegeuk Kim | 9850cf4 | 2014-09-02 15:52:58 -0700 | [diff] [blame] | 265 | f2fs_bug_on(sbi, IS_ERR(ipage)); |
Nicholas Krause | 545fe42 | 2015-09-21 18:55:49 -0400 | [diff] [blame] | 266 | if (!truncate_inline_inode(ipage, 0)) |
| 267 | return false; |
Jaegeuk Kim | b3d208f | 2014-10-23 19:48:09 -0700 | [diff] [blame] | 268 | f2fs_clear_inline_inode(inode); |
Jaegeuk Kim | 1e1bb4b | 2013-12-26 12:49:48 +0900 | [diff] [blame] | 269 | update_inode(inode, ipage); |
| 270 | f2fs_put_page(ipage, 1); |
Jaegeuk Kim | 0342fd3 | 2014-08-07 16:57:17 -0700 | [diff] [blame] | 271 | } else if (ri && (ri->i_inline & F2FS_INLINE_DATA)) { |
Nicholas Krause | 545fe42 | 2015-09-21 18:55:49 -0400 | [diff] [blame] | 272 | if (truncate_blocks(inode, 0, false)) |
| 273 | return false; |
Jaegeuk Kim | 1e1bb4b | 2013-12-26 12:49:48 +0900 | [diff] [blame] | 274 | goto process_inline; |
| 275 | } |
Jaegeuk Kim | 0342fd3 | 2014-08-07 16:57:17 -0700 | [diff] [blame] | 276 | return false; |
Jaegeuk Kim | 1e1bb4b | 2013-12-26 12:49:48 +0900 | [diff] [blame] | 277 | } |
Chao Yu | 201a05b | 2014-09-24 18:17:53 +0800 | [diff] [blame] | 278 | |
| 279 | struct f2fs_dir_entry *find_in_inline_dir(struct inode *dir, |
Jaegeuk Kim | 0b81d07 | 2015-05-15 16:26:10 -0700 | [diff] [blame] | 280 | struct fscrypt_name *fname, struct page **res_page) |
Chao Yu | 201a05b | 2014-09-24 18:17:53 +0800 | [diff] [blame] | 281 | { |
| 282 | struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb); |
Jaegeuk Kim | 4e6ebf6 | 2014-10-13 17:26:14 -0700 | [diff] [blame] | 283 | struct f2fs_inline_dentry *inline_dentry; |
Jaegeuk Kim | 6e22c69 | 2015-04-27 17:12:39 -0700 | [diff] [blame] | 284 | struct qstr name = FSTR_TO_QSTR(&fname->disk_name); |
Chao Yu | 201a05b | 2014-09-24 18:17:53 +0800 | [diff] [blame] | 285 | struct f2fs_dir_entry *de; |
Jaegeuk Kim | 7b3cd7d | 2014-10-18 22:52:52 -0700 | [diff] [blame] | 286 | struct f2fs_dentry_ptr d; |
Jaegeuk Kim | 4e6ebf6 | 2014-10-13 17:26:14 -0700 | [diff] [blame] | 287 | struct page *ipage; |
Jaegeuk Kim | 6e22c69 | 2015-04-27 17:12:39 -0700 | [diff] [blame] | 288 | f2fs_hash_t namehash; |
Chao Yu | 201a05b | 2014-09-24 18:17:53 +0800 | [diff] [blame] | 289 | |
| 290 | ipage = get_node_page(sbi, dir->i_ino); |
| 291 | if (IS_ERR(ipage)) |
| 292 | return NULL; |
| 293 | |
Jaegeuk Kim | 6e22c69 | 2015-04-27 17:12:39 -0700 | [diff] [blame] | 294 | namehash = f2fs_dentry_hash(&name); |
| 295 | |
Jaegeuk Kim | 4e6ebf6 | 2014-10-13 17:26:14 -0700 | [diff] [blame] | 296 | inline_dentry = inline_data_addr(ipage); |
Chao Yu | 201a05b | 2014-09-24 18:17:53 +0800 | [diff] [blame] | 297 | |
Jaegeuk Kim | d8c6822 | 2015-04-27 16:26:24 -0700 | [diff] [blame] | 298 | make_dentry_ptr(NULL, &d, (void *)inline_dentry, 2); |
Jaegeuk Kim | 6e22c69 | 2015-04-27 17:12:39 -0700 | [diff] [blame] | 299 | de = find_target_dentry(fname, namehash, NULL, &d); |
Chao Yu | 201a05b | 2014-09-24 18:17:53 +0800 | [diff] [blame] | 300 | unlock_page(ipage); |
Jaegeuk Kim | 4e6ebf6 | 2014-10-13 17:26:14 -0700 | [diff] [blame] | 301 | if (de) |
| 302 | *res_page = ipage; |
| 303 | else |
| 304 | f2fs_put_page(ipage, 0); |
| 305 | |
| 306 | /* |
| 307 | * For the most part, it should be a bug when name_len is zero. |
| 308 | * We stop here for figuring out where the bugs has occurred. |
| 309 | */ |
Jaegeuk Kim | 7b3cd7d | 2014-10-18 22:52:52 -0700 | [diff] [blame] | 310 | f2fs_bug_on(sbi, d.max < 0); |
Chao Yu | 201a05b | 2014-09-24 18:17:53 +0800 | [diff] [blame] | 311 | return de; |
| 312 | } |
| 313 | |
| 314 | struct f2fs_dir_entry *f2fs_parent_inline_dir(struct inode *dir, |
| 315 | struct page **p) |
| 316 | { |
| 317 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
| 318 | struct page *ipage; |
| 319 | struct f2fs_dir_entry *de; |
| 320 | struct f2fs_inline_dentry *dentry_blk; |
| 321 | |
| 322 | ipage = get_node_page(sbi, dir->i_ino); |
| 323 | if (IS_ERR(ipage)) |
| 324 | return NULL; |
| 325 | |
| 326 | dentry_blk = inline_data_addr(ipage); |
| 327 | de = &dentry_blk->dentry[1]; |
| 328 | *p = ipage; |
| 329 | unlock_page(ipage); |
| 330 | return de; |
| 331 | } |
| 332 | |
| 333 | int make_empty_inline_dir(struct inode *inode, struct inode *parent, |
| 334 | struct page *ipage) |
| 335 | { |
| 336 | struct f2fs_inline_dentry *dentry_blk; |
Jaegeuk Kim | 062a3e7 | 2014-10-18 23:06:41 -0700 | [diff] [blame] | 337 | struct f2fs_dentry_ptr d; |
Chao Yu | 201a05b | 2014-09-24 18:17:53 +0800 | [diff] [blame] | 338 | |
| 339 | dentry_blk = inline_data_addr(ipage); |
| 340 | |
Jaegeuk Kim | d8c6822 | 2015-04-27 16:26:24 -0700 | [diff] [blame] | 341 | make_dentry_ptr(NULL, &d, (void *)dentry_blk, 2); |
Jaegeuk Kim | 062a3e7 | 2014-10-18 23:06:41 -0700 | [diff] [blame] | 342 | do_make_empty_dir(inode, parent, &d); |
Chao Yu | 201a05b | 2014-09-24 18:17:53 +0800 | [diff] [blame] | 343 | |
| 344 | set_page_dirty(ipage); |
| 345 | |
| 346 | /* update i_size to MAX_INLINE_DATA */ |
| 347 | if (i_size_read(inode) < MAX_INLINE_DATA) { |
| 348 | i_size_write(inode, MAX_INLINE_DATA); |
| 349 | set_inode_flag(F2FS_I(inode), FI_UPDATE_DIR); |
| 350 | } |
| 351 | return 0; |
| 352 | } |
| 353 | |
Chao Yu | 470f00e | 2015-07-14 18:14:06 +0800 | [diff] [blame] | 354 | /* |
| 355 | * NOTE: ipage is grabbed by caller, but if any error occurs, we should |
| 356 | * release ipage in this function. |
| 357 | */ |
Jaegeuk Kim | d64948a | 2014-10-20 20:28:49 -0700 | [diff] [blame] | 358 | static int f2fs_convert_inline_dir(struct inode *dir, struct page *ipage, |
Chao Yu | 201a05b | 2014-09-24 18:17:53 +0800 | [diff] [blame] | 359 | struct f2fs_inline_dentry *inline_dentry) |
| 360 | { |
| 361 | struct page *page; |
| 362 | struct dnode_of_data dn; |
| 363 | struct f2fs_dentry_block *dentry_blk; |
| 364 | int err; |
| 365 | |
| 366 | page = grab_cache_page(dir->i_mapping, 0); |
Chao Yu | 470f00e | 2015-07-14 18:14:06 +0800 | [diff] [blame] | 367 | if (!page) { |
| 368 | f2fs_put_page(ipage, 1); |
Chao Yu | 201a05b | 2014-09-24 18:17:53 +0800 | [diff] [blame] | 369 | return -ENOMEM; |
Chao Yu | 470f00e | 2015-07-14 18:14:06 +0800 | [diff] [blame] | 370 | } |
Chao Yu | 201a05b | 2014-09-24 18:17:53 +0800 | [diff] [blame] | 371 | |
| 372 | set_new_dnode(&dn, dir, ipage, NULL, 0); |
| 373 | err = f2fs_reserve_block(&dn, 0); |
| 374 | if (err) |
| 375 | goto out; |
| 376 | |
Jaegeuk Kim | fec1d65 | 2016-01-20 23:43:51 +0800 | [diff] [blame] | 377 | f2fs_wait_on_page_writeback(page, DATA, true); |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame^] | 378 | zero_user_segment(page, MAX_INLINE_DATA, PAGE_SIZE); |
Chao Yu | 201a05b | 2014-09-24 18:17:53 +0800 | [diff] [blame] | 379 | |
Jaegeuk Kim | f1e33a0 | 2014-10-18 23:41:38 -0700 | [diff] [blame] | 380 | dentry_blk = kmap_atomic(page); |
Chao Yu | 201a05b | 2014-09-24 18:17:53 +0800 | [diff] [blame] | 381 | |
| 382 | /* copy data from inline dentry block to new dentry block */ |
| 383 | memcpy(dentry_blk->dentry_bitmap, inline_dentry->dentry_bitmap, |
| 384 | INLINE_DENTRY_BITMAP_SIZE); |
Chao Yu | 4ec17d6 | 2015-08-24 17:36:25 +0800 | [diff] [blame] | 385 | memset(dentry_blk->dentry_bitmap + INLINE_DENTRY_BITMAP_SIZE, 0, |
| 386 | SIZE_OF_DENTRY_BITMAP - INLINE_DENTRY_BITMAP_SIZE); |
| 387 | /* |
| 388 | * we do not need to zero out remainder part of dentry and filename |
| 389 | * field, since we have used bitmap for marking the usage status of |
| 390 | * them, besides, we can also ignore copying/zeroing reserved space |
| 391 | * of dentry block, because them haven't been used so far. |
| 392 | */ |
Chao Yu | 201a05b | 2014-09-24 18:17:53 +0800 | [diff] [blame] | 393 | memcpy(dentry_blk->dentry, inline_dentry->dentry, |
| 394 | sizeof(struct f2fs_dir_entry) * NR_INLINE_DENTRY); |
| 395 | memcpy(dentry_blk->filename, inline_dentry->filename, |
| 396 | NR_INLINE_DENTRY * F2FS_SLOT_LEN); |
| 397 | |
Jaegeuk Kim | f1e33a0 | 2014-10-18 23:41:38 -0700 | [diff] [blame] | 398 | kunmap_atomic(dentry_blk); |
Chao Yu | 201a05b | 2014-09-24 18:17:53 +0800 | [diff] [blame] | 399 | SetPageUptodate(page); |
| 400 | set_page_dirty(page); |
| 401 | |
| 402 | /* clear inline dir and flag after data writeback */ |
Chao Yu | 0bfcfcc | 2015-03-10 13:16:25 +0800 | [diff] [blame] | 403 | truncate_inline_inode(ipage, 0); |
Jaegeuk Kim | b3d208f | 2014-10-23 19:48:09 -0700 | [diff] [blame] | 404 | |
Jaegeuk Kim | 3289c06 | 2014-10-13 20:00:16 -0700 | [diff] [blame] | 405 | stat_dec_inline_dir(dir); |
Chao Yu | 622f28a | 2014-09-24 18:19:10 +0800 | [diff] [blame] | 406 | clear_inode_flag(F2FS_I(dir), FI_INLINE_DENTRY); |
Chao Yu | 201a05b | 2014-09-24 18:17:53 +0800 | [diff] [blame] | 407 | |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame^] | 408 | if (i_size_read(dir) < PAGE_SIZE) { |
| 409 | i_size_write(dir, PAGE_SIZE); |
Chao Yu | 201a05b | 2014-09-24 18:17:53 +0800 | [diff] [blame] | 410 | set_inode_flag(F2FS_I(dir), FI_UPDATE_DIR); |
| 411 | } |
| 412 | |
| 413 | sync_inode_page(&dn); |
| 414 | out: |
| 415 | f2fs_put_page(page, 1); |
| 416 | return err; |
| 417 | } |
| 418 | |
| 419 | int f2fs_add_inline_entry(struct inode *dir, const struct qstr *name, |
Jaegeuk Kim | 510022a | 2015-03-30 15:07:16 -0700 | [diff] [blame] | 420 | struct inode *inode, nid_t ino, umode_t mode) |
Chao Yu | 201a05b | 2014-09-24 18:17:53 +0800 | [diff] [blame] | 421 | { |
| 422 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
| 423 | struct page *ipage; |
| 424 | unsigned int bit_pos; |
| 425 | f2fs_hash_t name_hash; |
Chao Yu | 201a05b | 2014-09-24 18:17:53 +0800 | [diff] [blame] | 426 | size_t namelen = name->len; |
| 427 | struct f2fs_inline_dentry *dentry_blk = NULL; |
Chao Yu | 3b4d732 | 2015-02-16 16:17:20 +0800 | [diff] [blame] | 428 | struct f2fs_dentry_ptr d; |
Chao Yu | 201a05b | 2014-09-24 18:17:53 +0800 | [diff] [blame] | 429 | int slots = GET_DENTRY_SLOTS(namelen); |
Jaegeuk Kim | 510022a | 2015-03-30 15:07:16 -0700 | [diff] [blame] | 430 | struct page *page = NULL; |
Chao Yu | 201a05b | 2014-09-24 18:17:53 +0800 | [diff] [blame] | 431 | int err = 0; |
Chao Yu | 201a05b | 2014-09-24 18:17:53 +0800 | [diff] [blame] | 432 | |
| 433 | ipage = get_node_page(sbi, dir->i_ino); |
| 434 | if (IS_ERR(ipage)) |
| 435 | return PTR_ERR(ipage); |
| 436 | |
| 437 | dentry_blk = inline_data_addr(ipage); |
Jaegeuk Kim | a82afa2 | 2014-10-13 16:28:13 -0700 | [diff] [blame] | 438 | bit_pos = room_for_filename(&dentry_blk->dentry_bitmap, |
| 439 | slots, NR_INLINE_DENTRY); |
Chao Yu | 201a05b | 2014-09-24 18:17:53 +0800 | [diff] [blame] | 440 | if (bit_pos >= NR_INLINE_DENTRY) { |
| 441 | err = f2fs_convert_inline_dir(dir, ipage, dentry_blk); |
Chao Yu | 470f00e | 2015-07-14 18:14:06 +0800 | [diff] [blame] | 442 | if (err) |
| 443 | return err; |
| 444 | err = -EAGAIN; |
Chao Yu | 201a05b | 2014-09-24 18:17:53 +0800 | [diff] [blame] | 445 | goto out; |
| 446 | } |
| 447 | |
Jaegeuk Kim | 510022a | 2015-03-30 15:07:16 -0700 | [diff] [blame] | 448 | if (inode) { |
| 449 | down_write(&F2FS_I(inode)->i_sem); |
| 450 | page = init_inode_metadata(inode, dir, name, ipage); |
| 451 | if (IS_ERR(page)) { |
| 452 | err = PTR_ERR(page); |
| 453 | goto fail; |
| 454 | } |
Chao Yu | 201a05b | 2014-09-24 18:17:53 +0800 | [diff] [blame] | 455 | } |
Jaegeuk Kim | bce8d11 | 2014-10-13 19:42:53 -0700 | [diff] [blame] | 456 | |
Jaegeuk Kim | fec1d65 | 2016-01-20 23:43:51 +0800 | [diff] [blame] | 457 | f2fs_wait_on_page_writeback(ipage, NODE, true); |
Chao Yu | 3b4d732 | 2015-02-16 16:17:20 +0800 | [diff] [blame] | 458 | |
| 459 | name_hash = f2fs_dentry_hash(name); |
Jaegeuk Kim | d8c6822 | 2015-04-27 16:26:24 -0700 | [diff] [blame] | 460 | make_dentry_ptr(NULL, &d, (void *)dentry_blk, 2); |
Jaegeuk Kim | 510022a | 2015-03-30 15:07:16 -0700 | [diff] [blame] | 461 | f2fs_update_dentry(ino, mode, &d, name, name_hash, bit_pos); |
Chao Yu | 3b4d732 | 2015-02-16 16:17:20 +0800 | [diff] [blame] | 462 | |
Chao Yu | 201a05b | 2014-09-24 18:17:53 +0800 | [diff] [blame] | 463 | set_page_dirty(ipage); |
| 464 | |
| 465 | /* we don't need to mark_inode_dirty now */ |
Jaegeuk Kim | 510022a | 2015-03-30 15:07:16 -0700 | [diff] [blame] | 466 | if (inode) { |
| 467 | F2FS_I(inode)->i_pino = dir->i_ino; |
| 468 | update_inode(inode, page); |
| 469 | f2fs_put_page(page, 1); |
| 470 | } |
Chao Yu | 201a05b | 2014-09-24 18:17:53 +0800 | [diff] [blame] | 471 | |
| 472 | update_parent_metadata(dir, inode, 0); |
| 473 | fail: |
Jaegeuk Kim | 510022a | 2015-03-30 15:07:16 -0700 | [diff] [blame] | 474 | if (inode) |
| 475 | up_write(&F2FS_I(inode)->i_sem); |
Chao Yu | 201a05b | 2014-09-24 18:17:53 +0800 | [diff] [blame] | 476 | |
| 477 | if (is_inode_flag_set(F2FS_I(dir), FI_UPDATE_DIR)) { |
| 478 | update_inode(dir, ipage); |
| 479 | clear_inode_flag(F2FS_I(dir), FI_UPDATE_DIR); |
| 480 | } |
| 481 | out: |
| 482 | f2fs_put_page(ipage, 1); |
| 483 | return err; |
| 484 | } |
| 485 | |
| 486 | void f2fs_delete_inline_entry(struct f2fs_dir_entry *dentry, struct page *page, |
| 487 | struct inode *dir, struct inode *inode) |
| 488 | { |
| 489 | struct f2fs_inline_dentry *inline_dentry; |
| 490 | int slots = GET_DENTRY_SLOTS(le16_to_cpu(dentry->name_len)); |
| 491 | unsigned int bit_pos; |
| 492 | int i; |
| 493 | |
| 494 | lock_page(page); |
Jaegeuk Kim | fec1d65 | 2016-01-20 23:43:51 +0800 | [diff] [blame] | 495 | f2fs_wait_on_page_writeback(page, NODE, true); |
Chao Yu | 201a05b | 2014-09-24 18:17:53 +0800 | [diff] [blame] | 496 | |
| 497 | inline_dentry = inline_data_addr(page); |
| 498 | bit_pos = dentry - inline_dentry->dentry; |
| 499 | for (i = 0; i < slots; i++) |
| 500 | test_and_clear_bit_le(bit_pos + i, |
| 501 | &inline_dentry->dentry_bitmap); |
| 502 | |
| 503 | set_page_dirty(page); |
| 504 | |
| 505 | dir->i_ctime = dir->i_mtime = CURRENT_TIME; |
| 506 | |
| 507 | if (inode) |
| 508 | f2fs_drop_nlink(dir, inode, page); |
| 509 | |
| 510 | f2fs_put_page(page, 1); |
| 511 | } |
| 512 | |
| 513 | bool f2fs_empty_inline_dir(struct inode *dir) |
| 514 | { |
| 515 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
| 516 | struct page *ipage; |
| 517 | unsigned int bit_pos = 2; |
| 518 | struct f2fs_inline_dentry *dentry_blk; |
| 519 | |
| 520 | ipage = get_node_page(sbi, dir->i_ino); |
| 521 | if (IS_ERR(ipage)) |
| 522 | return false; |
| 523 | |
| 524 | dentry_blk = inline_data_addr(ipage); |
| 525 | bit_pos = find_next_bit_le(&dentry_blk->dentry_bitmap, |
| 526 | NR_INLINE_DENTRY, |
| 527 | bit_pos); |
| 528 | |
| 529 | f2fs_put_page(ipage, 1); |
| 530 | |
| 531 | if (bit_pos < NR_INLINE_DENTRY) |
| 532 | return false; |
| 533 | |
| 534 | return true; |
| 535 | } |
| 536 | |
Jaegeuk Kim | d8c6822 | 2015-04-27 16:26:24 -0700 | [diff] [blame] | 537 | int f2fs_read_inline_dir(struct file *file, struct dir_context *ctx, |
Jaegeuk Kim | 0b81d07 | 2015-05-15 16:26:10 -0700 | [diff] [blame] | 538 | struct fscrypt_str *fstr) |
Chao Yu | 201a05b | 2014-09-24 18:17:53 +0800 | [diff] [blame] | 539 | { |
| 540 | struct inode *inode = file_inode(file); |
Chao Yu | 201a05b | 2014-09-24 18:17:53 +0800 | [diff] [blame] | 541 | struct f2fs_inline_dentry *inline_dentry = NULL; |
Chao Yu | 201a05b | 2014-09-24 18:17:53 +0800 | [diff] [blame] | 542 | struct page *ipage = NULL; |
Jaegeuk Kim | 7b3cd7d | 2014-10-18 22:52:52 -0700 | [diff] [blame] | 543 | struct f2fs_dentry_ptr d; |
Chao Yu | 201a05b | 2014-09-24 18:17:53 +0800 | [diff] [blame] | 544 | |
| 545 | if (ctx->pos == NR_INLINE_DENTRY) |
| 546 | return 0; |
| 547 | |
Jaegeuk Kim | 38594de | 2014-10-15 21:29:51 -0700 | [diff] [blame] | 548 | ipage = get_node_page(F2FS_I_SB(inode), inode->i_ino); |
Chao Yu | 201a05b | 2014-09-24 18:17:53 +0800 | [diff] [blame] | 549 | if (IS_ERR(ipage)) |
| 550 | return PTR_ERR(ipage); |
| 551 | |
Chao Yu | 201a05b | 2014-09-24 18:17:53 +0800 | [diff] [blame] | 552 | inline_dentry = inline_data_addr(ipage); |
Chao Yu | 201a05b | 2014-09-24 18:17:53 +0800 | [diff] [blame] | 553 | |
Jaegeuk Kim | d8c6822 | 2015-04-27 16:26:24 -0700 | [diff] [blame] | 554 | make_dentry_ptr(inode, &d, (void *)inline_dentry, 2); |
Jaegeuk Kim | 7b3cd7d | 2014-10-18 22:52:52 -0700 | [diff] [blame] | 555 | |
Jaegeuk Kim | d8c6822 | 2015-04-27 16:26:24 -0700 | [diff] [blame] | 556 | if (!f2fs_fill_dentries(ctx, &d, 0, fstr)) |
Jaegeuk Kim | 38594de | 2014-10-15 21:29:51 -0700 | [diff] [blame] | 557 | ctx->pos = NR_INLINE_DENTRY; |
Chao Yu | 201a05b | 2014-09-24 18:17:53 +0800 | [diff] [blame] | 558 | |
Chao Yu | 201a05b | 2014-09-24 18:17:53 +0800 | [diff] [blame] | 559 | f2fs_put_page(ipage, 1); |
Chao Yu | 201a05b | 2014-09-24 18:17:53 +0800 | [diff] [blame] | 560 | return 0; |
| 561 | } |
Jaegeuk Kim | 67f8cf3 | 2015-10-15 11:34:49 -0700 | [diff] [blame] | 562 | |
| 563 | int f2fs_inline_data_fiemap(struct inode *inode, |
| 564 | struct fiemap_extent_info *fieinfo, __u64 start, __u64 len) |
| 565 | { |
| 566 | __u64 byteaddr, ilen; |
| 567 | __u32 flags = FIEMAP_EXTENT_DATA_INLINE | FIEMAP_EXTENT_NOT_ALIGNED | |
| 568 | FIEMAP_EXTENT_LAST; |
| 569 | struct node_info ni; |
| 570 | struct page *ipage; |
| 571 | int err = 0; |
| 572 | |
| 573 | ipage = get_node_page(F2FS_I_SB(inode), inode->i_ino); |
| 574 | if (IS_ERR(ipage)) |
| 575 | return PTR_ERR(ipage); |
| 576 | |
| 577 | if (!f2fs_has_inline_data(inode)) { |
| 578 | err = -EAGAIN; |
| 579 | goto out; |
| 580 | } |
| 581 | |
| 582 | ilen = min_t(size_t, MAX_INLINE_DATA, i_size_read(inode)); |
| 583 | if (start >= ilen) |
| 584 | goto out; |
| 585 | if (start + len < ilen) |
| 586 | ilen = start + len; |
| 587 | ilen -= start; |
| 588 | |
| 589 | get_node_info(F2FS_I_SB(inode), inode->i_ino, &ni); |
| 590 | byteaddr = (__u64)ni.blk_addr << inode->i_sb->s_blocksize_bits; |
| 591 | byteaddr += (char *)inline_data_addr(ipage) - (char *)F2FS_INODE(ipage); |
| 592 | err = fiemap_fill_next_extent(fieinfo, start, byteaddr, ilen, flags); |
| 593 | out: |
| 594 | f2fs_put_page(ipage, 1); |
| 595 | return err; |
| 596 | } |