Jaegeuk Kim | 0a8165d | 2012-11-29 13:28:09 +0900 | [diff] [blame] | 1 | /* |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 2 | * fs/f2fs/data.c |
| 3 | * |
| 4 | * Copyright (c) 2012 Samsung Electronics Co., Ltd. |
| 5 | * http://www.samsung.com/ |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License version 2 as |
| 9 | * published by the Free Software Foundation. |
| 10 | */ |
| 11 | #include <linux/fs.h> |
| 12 | #include <linux/f2fs_fs.h> |
| 13 | #include <linux/buffer_head.h> |
| 14 | #include <linux/mpage.h> |
| 15 | #include <linux/writeback.h> |
| 16 | #include <linux/backing-dev.h> |
Chao Yu | 8f46dca | 2015-07-14 18:56:10 +0800 | [diff] [blame] | 17 | #include <linux/pagevec.h> |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 18 | #include <linux/blkdev.h> |
| 19 | #include <linux/bio.h> |
Geert Uytterhoeven | 690e4a3 | 2012-12-19 22:19:30 +0100 | [diff] [blame] | 20 | #include <linux/prefetch.h> |
Christoph Hellwig | e2e40f2 | 2015-02-22 08:58:50 -0800 | [diff] [blame] | 21 | #include <linux/uio.h> |
Jaegeuk Kim | f1e8866 | 2015-04-09 11:20:42 -0700 | [diff] [blame] | 22 | #include <linux/cleancache.h> |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 23 | |
| 24 | #include "f2fs.h" |
| 25 | #include "node.h" |
| 26 | #include "segment.h" |
Jaegeuk Kim | db9f7c1 | 2014-12-17 20:04:08 -0800 | [diff] [blame] | 27 | #include "trace.h" |
Namjae Jeon | 848753a | 2013-04-23 16:38:02 +0900 | [diff] [blame] | 28 | #include <trace/events/f2fs.h> |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 29 | |
Christoph Hellwig | 4246a0b | 2015-07-20 15:29:37 +0200 | [diff] [blame] | 30 | static void f2fs_read_end_io(struct bio *bio) |
Jaegeuk Kim | 93dfe2a | 2013-11-30 12:51:14 +0900 | [diff] [blame] | 31 | { |
Linus Torvalds | f568849 | 2014-01-30 11:19:05 -0800 | [diff] [blame] | 32 | struct bio_vec *bvec; |
| 33 | int i; |
Jaegeuk Kim | 93dfe2a | 2013-11-30 12:51:14 +0900 | [diff] [blame] | 34 | |
Chao Yu | 1237702 | 2015-05-25 18:03:38 +0800 | [diff] [blame] | 35 | if (f2fs_bio_encrypted(bio)) { |
Christoph Hellwig | 4246a0b | 2015-07-20 15:29:37 +0200 | [diff] [blame] | 36 | if (bio->bi_error) { |
Jaegeuk Kim | 0b81d07 | 2015-05-15 16:26:10 -0700 | [diff] [blame] | 37 | fscrypt_release_ctx(bio->bi_private); |
Chao Yu | 1237702 | 2015-05-25 18:03:38 +0800 | [diff] [blame] | 38 | } else { |
Jaegeuk Kim | 0b81d07 | 2015-05-15 16:26:10 -0700 | [diff] [blame] | 39 | fscrypt_decrypt_bio_pages(bio->bi_private, bio); |
Chao Yu | 1237702 | 2015-05-25 18:03:38 +0800 | [diff] [blame] | 40 | return; |
| 41 | } |
| 42 | } |
| 43 | |
Linus Torvalds | f568849 | 2014-01-30 11:19:05 -0800 | [diff] [blame] | 44 | bio_for_each_segment_all(bvec, bio, i) { |
Jaegeuk Kim | 93dfe2a | 2013-11-30 12:51:14 +0900 | [diff] [blame] | 45 | struct page *page = bvec->bv_page; |
| 46 | |
Christoph Hellwig | 4246a0b | 2015-07-20 15:29:37 +0200 | [diff] [blame] | 47 | if (!bio->bi_error) { |
Linus Torvalds | f568849 | 2014-01-30 11:19:05 -0800 | [diff] [blame] | 48 | SetPageUptodate(page); |
| 49 | } else { |
Jaegeuk Kim | 93dfe2a | 2013-11-30 12:51:14 +0900 | [diff] [blame] | 50 | ClearPageUptodate(page); |
| 51 | SetPageError(page); |
| 52 | } |
| 53 | unlock_page(page); |
Linus Torvalds | f568849 | 2014-01-30 11:19:05 -0800 | [diff] [blame] | 54 | } |
Jaegeuk Kim | 93dfe2a | 2013-11-30 12:51:14 +0900 | [diff] [blame] | 55 | bio_put(bio); |
| 56 | } |
| 57 | |
Christoph Hellwig | 4246a0b | 2015-07-20 15:29:37 +0200 | [diff] [blame] | 58 | static void f2fs_write_end_io(struct bio *bio) |
Jaegeuk Kim | 93dfe2a | 2013-11-30 12:51:14 +0900 | [diff] [blame] | 59 | { |
Jaegeuk Kim | 1b1f559 | 2014-02-03 10:50:22 +0900 | [diff] [blame] | 60 | struct f2fs_sb_info *sbi = bio->bi_private; |
Linus Torvalds | f568849 | 2014-01-30 11:19:05 -0800 | [diff] [blame] | 61 | struct bio_vec *bvec; |
| 62 | int i; |
Jaegeuk Kim | 93dfe2a | 2013-11-30 12:51:14 +0900 | [diff] [blame] | 63 | |
Linus Torvalds | f568849 | 2014-01-30 11:19:05 -0800 | [diff] [blame] | 64 | bio_for_each_segment_all(bvec, bio, i) { |
Jaegeuk Kim | 93dfe2a | 2013-11-30 12:51:14 +0900 | [diff] [blame] | 65 | struct page *page = bvec->bv_page; |
| 66 | |
Jaegeuk Kim | 0b81d07 | 2015-05-15 16:26:10 -0700 | [diff] [blame] | 67 | fscrypt_pullback_bio_page(&page, true); |
Jaegeuk Kim | 4375a33 | 2015-04-23 12:04:33 -0700 | [diff] [blame] | 68 | |
Christoph Hellwig | 4246a0b | 2015-07-20 15:29:37 +0200 | [diff] [blame] | 69 | if (unlikely(bio->bi_error)) { |
Jaegeuk Kim | 93dfe2a | 2013-11-30 12:51:14 +0900 | [diff] [blame] | 70 | set_bit(AS_EIO, &page->mapping->flags); |
Jaegeuk Kim | 38f91ca | 2016-05-18 14:07:56 -0700 | [diff] [blame] | 71 | f2fs_stop_checkpoint(sbi, true); |
Jaegeuk Kim | 93dfe2a | 2013-11-30 12:51:14 +0900 | [diff] [blame] | 72 | } |
| 73 | end_page_writeback(page); |
Linus Torvalds | f568849 | 2014-01-30 11:19:05 -0800 | [diff] [blame] | 74 | } |
Jaegeuk Kim | f573018 | 2016-05-17 16:23:36 -0700 | [diff] [blame] | 75 | if (atomic_dec_and_test(&sbi->nr_wb_bios) && |
| 76 | wq_has_sleeper(&sbi->cp_wait)) |
Jaegeuk Kim | 93dfe2a | 2013-11-30 12:51:14 +0900 | [diff] [blame] | 77 | wake_up(&sbi->cp_wait); |
| 78 | |
| 79 | bio_put(bio); |
| 80 | } |
| 81 | |
Gu Zheng | 940a6d3 | 2013-12-20 17:39:59 +0800 | [diff] [blame] | 82 | /* |
| 83 | * Low-level block read/write IO operations. |
| 84 | */ |
| 85 | static struct bio *__bio_alloc(struct f2fs_sb_info *sbi, block_t blk_addr, |
| 86 | int npages, bool is_read) |
| 87 | { |
| 88 | struct bio *bio; |
| 89 | |
Jaegeuk Kim | 740432f | 2015-08-14 11:43:56 -0700 | [diff] [blame] | 90 | bio = f2fs_bio_alloc(npages); |
Gu Zheng | 940a6d3 | 2013-12-20 17:39:59 +0800 | [diff] [blame] | 91 | |
| 92 | bio->bi_bdev = sbi->sb->s_bdev; |
Chao Yu | 55cf9cb | 2014-09-15 18:01:10 +0800 | [diff] [blame] | 93 | bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(blk_addr); |
Gu Zheng | 940a6d3 | 2013-12-20 17:39:59 +0800 | [diff] [blame] | 94 | bio->bi_end_io = is_read ? f2fs_read_end_io : f2fs_write_end_io; |
Chao Yu | 1237702 | 2015-05-25 18:03:38 +0800 | [diff] [blame] | 95 | bio->bi_private = is_read ? NULL : sbi; |
Gu Zheng | 940a6d3 | 2013-12-20 17:39:59 +0800 | [diff] [blame] | 96 | |
| 97 | return bio; |
| 98 | } |
| 99 | |
Jaegeuk Kim | f573018 | 2016-05-17 16:23:36 -0700 | [diff] [blame] | 100 | static inline void __submit_bio(struct f2fs_sb_info *sbi, int rw, |
Jaegeuk Kim | 19a5f5e | 2016-06-04 14:25:24 -0700 | [diff] [blame] | 101 | struct bio *bio, enum page_type type) |
Jaegeuk Kim | f573018 | 2016-05-17 16:23:36 -0700 | [diff] [blame] | 102 | { |
Jaegeuk Kim | 19a5f5e | 2016-06-04 14:25:24 -0700 | [diff] [blame] | 103 | if (!is_read_io(rw)) { |
Jaegeuk Kim | f573018 | 2016-05-17 16:23:36 -0700 | [diff] [blame] | 104 | atomic_inc(&sbi->nr_wb_bios); |
Jaegeuk Kim | 19a5f5e | 2016-06-04 14:25:24 -0700 | [diff] [blame] | 105 | if (current->plug && (type == DATA || type == NODE)) |
| 106 | blk_finish_plug(current->plug); |
| 107 | } |
Jaegeuk Kim | f573018 | 2016-05-17 16:23:36 -0700 | [diff] [blame] | 108 | submit_bio(rw, bio); |
| 109 | } |
| 110 | |
Jaegeuk Kim | 458e619 | 2013-12-11 13:54:01 +0900 | [diff] [blame] | 111 | static void __submit_merged_bio(struct f2fs_bio_info *io) |
Jaegeuk Kim | 93dfe2a | 2013-11-30 12:51:14 +0900 | [diff] [blame] | 112 | { |
Jaegeuk Kim | 458e619 | 2013-12-11 13:54:01 +0900 | [diff] [blame] | 113 | struct f2fs_io_info *fio = &io->fio; |
Jaegeuk Kim | 93dfe2a | 2013-11-30 12:51:14 +0900 | [diff] [blame] | 114 | |
| 115 | if (!io->bio) |
| 116 | return; |
| 117 | |
Jaegeuk Kim | 6a8f8ca | 2014-10-29 14:37:22 -0700 | [diff] [blame] | 118 | if (is_read_io(fio->rw)) |
Chao Yu | 2ace38e | 2014-12-24 16:08:14 +0800 | [diff] [blame] | 119 | trace_f2fs_submit_read_bio(io->sbi->sb, fio, io->bio); |
Jaegeuk Kim | 6a8f8ca | 2014-10-29 14:37:22 -0700 | [diff] [blame] | 120 | else |
Chao Yu | 2ace38e | 2014-12-24 16:08:14 +0800 | [diff] [blame] | 121 | trace_f2fs_submit_write_bio(io->sbi->sb, fio, io->bio); |
Jaegeuk Kim | 93dfe2a | 2013-11-30 12:51:14 +0900 | [diff] [blame] | 122 | |
Jaegeuk Kim | 19a5f5e | 2016-06-04 14:25:24 -0700 | [diff] [blame] | 123 | __submit_bio(io->sbi, fio->rw, io->bio, fio->type); |
Jaegeuk Kim | 93dfe2a | 2013-11-30 12:51:14 +0900 | [diff] [blame] | 124 | io->bio = NULL; |
| 125 | } |
| 126 | |
Chao Yu | 0c3a579 | 2016-01-18 18:28:11 +0800 | [diff] [blame] | 127 | static bool __has_merged_page(struct f2fs_bio_info *io, struct inode *inode, |
| 128 | struct page *page, nid_t ino) |
Chao Yu | 0fd785e | 2016-01-18 18:24:59 +0800 | [diff] [blame] | 129 | { |
Chao Yu | 0fd785e | 2016-01-18 18:24:59 +0800 | [diff] [blame] | 130 | struct bio_vec *bvec; |
| 131 | struct page *target; |
| 132 | int i; |
| 133 | |
Chao Yu | 0c3a579 | 2016-01-18 18:28:11 +0800 | [diff] [blame] | 134 | if (!io->bio) |
Chao Yu | 0fd785e | 2016-01-18 18:24:59 +0800 | [diff] [blame] | 135 | return false; |
Chao Yu | 0c3a579 | 2016-01-18 18:28:11 +0800 | [diff] [blame] | 136 | |
| 137 | if (!inode && !page && !ino) |
| 138 | return true; |
Chao Yu | 0fd785e | 2016-01-18 18:24:59 +0800 | [diff] [blame] | 139 | |
| 140 | bio_for_each_segment_all(bvec, io->bio, i) { |
| 141 | |
Jaegeuk Kim | 0b81d07 | 2015-05-15 16:26:10 -0700 | [diff] [blame] | 142 | if (bvec->bv_page->mapping) |
Chao Yu | 0fd785e | 2016-01-18 18:24:59 +0800 | [diff] [blame] | 143 | target = bvec->bv_page; |
Jaegeuk Kim | 0b81d07 | 2015-05-15 16:26:10 -0700 | [diff] [blame] | 144 | else |
| 145 | target = fscrypt_control_page(bvec->bv_page); |
Chao Yu | 0fd785e | 2016-01-18 18:24:59 +0800 | [diff] [blame] | 146 | |
Chao Yu | 0c3a579 | 2016-01-18 18:28:11 +0800 | [diff] [blame] | 147 | if (inode && inode == target->mapping->host) |
Chao Yu | 0fd785e | 2016-01-18 18:24:59 +0800 | [diff] [blame] | 148 | return true; |
Chao Yu | 0c3a579 | 2016-01-18 18:28:11 +0800 | [diff] [blame] | 149 | if (page && page == target) |
| 150 | return true; |
| 151 | if (ino && ino == ino_of_node(target)) |
| 152 | return true; |
Chao Yu | 0fd785e | 2016-01-18 18:24:59 +0800 | [diff] [blame] | 153 | } |
| 154 | |
Chao Yu | 0fd785e | 2016-01-18 18:24:59 +0800 | [diff] [blame] | 155 | return false; |
| 156 | } |
| 157 | |
Chao Yu | 0c3a579 | 2016-01-18 18:28:11 +0800 | [diff] [blame] | 158 | static bool has_merged_page(struct f2fs_sb_info *sbi, struct inode *inode, |
| 159 | struct page *page, nid_t ino, |
| 160 | enum page_type type) |
| 161 | { |
| 162 | enum page_type btype = PAGE_TYPE_OF_BIO(type); |
| 163 | struct f2fs_bio_info *io = &sbi->write_io[btype]; |
| 164 | bool ret; |
| 165 | |
| 166 | down_read(&io->io_rwsem); |
| 167 | ret = __has_merged_page(io, inode, page, ino); |
| 168 | up_read(&io->io_rwsem); |
| 169 | return ret; |
| 170 | } |
| 171 | |
| 172 | static void __f2fs_submit_merged_bio(struct f2fs_sb_info *sbi, |
| 173 | struct inode *inode, struct page *page, |
| 174 | nid_t ino, enum page_type type, int rw) |
Jaegeuk Kim | 93dfe2a | 2013-11-30 12:51:14 +0900 | [diff] [blame] | 175 | { |
| 176 | enum page_type btype = PAGE_TYPE_OF_BIO(type); |
| 177 | struct f2fs_bio_info *io; |
| 178 | |
| 179 | io = is_read_io(rw) ? &sbi->read_io : &sbi->write_io[btype]; |
| 180 | |
Chao Yu | df0f8dc | 2014-03-22 14:57:23 +0800 | [diff] [blame] | 181 | down_write(&io->io_rwsem); |
Jaegeuk Kim | 458e619 | 2013-12-11 13:54:01 +0900 | [diff] [blame] | 182 | |
Chao Yu | 0c3a579 | 2016-01-18 18:28:11 +0800 | [diff] [blame] | 183 | if (!__has_merged_page(io, inode, page, ino)) |
| 184 | goto out; |
| 185 | |
Jaegeuk Kim | 458e619 | 2013-12-11 13:54:01 +0900 | [diff] [blame] | 186 | /* change META to META_FLUSH in the checkpoint procedure */ |
| 187 | if (type >= META_FLUSH) { |
| 188 | io->fio.type = META_FLUSH; |
Jaegeuk Kim | 0f7b2ab | 2014-07-23 09:57:31 -0700 | [diff] [blame] | 189 | if (test_opt(sbi, NOBARRIER)) |
| 190 | io->fio.rw = WRITE_FLUSH | REQ_META | REQ_PRIO; |
| 191 | else |
| 192 | io->fio.rw = WRITE_FLUSH_FUA | REQ_META | REQ_PRIO; |
Jaegeuk Kim | 458e619 | 2013-12-11 13:54:01 +0900 | [diff] [blame] | 193 | } |
| 194 | __submit_merged_bio(io); |
Chao Yu | 0c3a579 | 2016-01-18 18:28:11 +0800 | [diff] [blame] | 195 | out: |
Chao Yu | df0f8dc | 2014-03-22 14:57:23 +0800 | [diff] [blame] | 196 | up_write(&io->io_rwsem); |
Jaegeuk Kim | 93dfe2a | 2013-11-30 12:51:14 +0900 | [diff] [blame] | 197 | } |
| 198 | |
Chao Yu | 0c3a579 | 2016-01-18 18:28:11 +0800 | [diff] [blame] | 199 | void f2fs_submit_merged_bio(struct f2fs_sb_info *sbi, enum page_type type, |
| 200 | int rw) |
| 201 | { |
| 202 | __f2fs_submit_merged_bio(sbi, NULL, NULL, 0, type, rw); |
| 203 | } |
| 204 | |
| 205 | void f2fs_submit_merged_bio_cond(struct f2fs_sb_info *sbi, |
| 206 | struct inode *inode, struct page *page, |
| 207 | nid_t ino, enum page_type type, int rw) |
| 208 | { |
| 209 | if (has_merged_page(sbi, inode, page, ino, type)) |
| 210 | __f2fs_submit_merged_bio(sbi, inode, page, ino, type, rw); |
| 211 | } |
| 212 | |
Chao Yu | 406657d | 2016-02-24 17:17:55 +0800 | [diff] [blame] | 213 | void f2fs_flush_merged_bios(struct f2fs_sb_info *sbi) |
| 214 | { |
| 215 | f2fs_submit_merged_bio(sbi, DATA, WRITE); |
| 216 | f2fs_submit_merged_bio(sbi, NODE, WRITE); |
| 217 | f2fs_submit_merged_bio(sbi, META, WRITE); |
| 218 | } |
| 219 | |
Jaegeuk Kim | 93dfe2a | 2013-11-30 12:51:14 +0900 | [diff] [blame] | 220 | /* |
| 221 | * Fill the locked page with data located in the block address. |
| 222 | * Return unlocked page. |
| 223 | */ |
Jaegeuk Kim | 05ca363 | 2015-04-23 14:38:15 -0700 | [diff] [blame] | 224 | int f2fs_submit_page_bio(struct f2fs_io_info *fio) |
Jaegeuk Kim | 93dfe2a | 2013-11-30 12:51:14 +0900 | [diff] [blame] | 225 | { |
Jaegeuk Kim | 93dfe2a | 2013-11-30 12:51:14 +0900 | [diff] [blame] | 226 | struct bio *bio; |
Jaegeuk Kim | 0b81d07 | 2015-05-15 16:26:10 -0700 | [diff] [blame] | 227 | struct page *page = fio->encrypted_page ? |
| 228 | fio->encrypted_page : fio->page; |
Jaegeuk Kim | 93dfe2a | 2013-11-30 12:51:14 +0900 | [diff] [blame] | 229 | |
Chao Yu | 2ace38e | 2014-12-24 16:08:14 +0800 | [diff] [blame] | 230 | trace_f2fs_submit_page_bio(page, fio); |
Jaegeuk Kim | 05ca363 | 2015-04-23 14:38:15 -0700 | [diff] [blame] | 231 | f2fs_trace_ios(fio, 0); |
Jaegeuk Kim | 93dfe2a | 2013-11-30 12:51:14 +0900 | [diff] [blame] | 232 | |
| 233 | /* Allocate a new bio */ |
Chao Yu | 7a9d754 | 2016-02-22 18:36:38 +0800 | [diff] [blame] | 234 | bio = __bio_alloc(fio->sbi, fio->new_blkaddr, 1, is_read_io(fio->rw)); |
Jaegeuk Kim | 93dfe2a | 2013-11-30 12:51:14 +0900 | [diff] [blame] | 235 | |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 236 | if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) { |
Jaegeuk Kim | 93dfe2a | 2013-11-30 12:51:14 +0900 | [diff] [blame] | 237 | bio_put(bio); |
Jaegeuk Kim | 93dfe2a | 2013-11-30 12:51:14 +0900 | [diff] [blame] | 238 | return -EFAULT; |
| 239 | } |
| 240 | |
Jaegeuk Kim | 19a5f5e | 2016-06-04 14:25:24 -0700 | [diff] [blame] | 241 | __submit_bio(fio->sbi, fio->rw, bio, fio->type); |
Jaegeuk Kim | 93dfe2a | 2013-11-30 12:51:14 +0900 | [diff] [blame] | 242 | return 0; |
| 243 | } |
| 244 | |
Jaegeuk Kim | 05ca363 | 2015-04-23 14:38:15 -0700 | [diff] [blame] | 245 | void f2fs_submit_page_mbio(struct f2fs_io_info *fio) |
Jaegeuk Kim | 93dfe2a | 2013-11-30 12:51:14 +0900 | [diff] [blame] | 246 | { |
Jaegeuk Kim | 05ca363 | 2015-04-23 14:38:15 -0700 | [diff] [blame] | 247 | struct f2fs_sb_info *sbi = fio->sbi; |
Jaegeuk Kim | 458e619 | 2013-12-11 13:54:01 +0900 | [diff] [blame] | 248 | enum page_type btype = PAGE_TYPE_OF_BIO(fio->type); |
Jaegeuk Kim | 93dfe2a | 2013-11-30 12:51:14 +0900 | [diff] [blame] | 249 | struct f2fs_bio_info *io; |
Gu Zheng | 940a6d3 | 2013-12-20 17:39:59 +0800 | [diff] [blame] | 250 | bool is_read = is_read_io(fio->rw); |
Jaegeuk Kim | 4375a33 | 2015-04-23 12:04:33 -0700 | [diff] [blame] | 251 | struct page *bio_page; |
Jaegeuk Kim | 93dfe2a | 2013-11-30 12:51:14 +0900 | [diff] [blame] | 252 | |
Gu Zheng | 940a6d3 | 2013-12-20 17:39:59 +0800 | [diff] [blame] | 253 | io = is_read ? &sbi->read_io : &sbi->write_io[btype]; |
Jaegeuk Kim | 93dfe2a | 2013-11-30 12:51:14 +0900 | [diff] [blame] | 254 | |
Chao Yu | 7a9d754 | 2016-02-22 18:36:38 +0800 | [diff] [blame] | 255 | if (fio->old_blkaddr != NEW_ADDR) |
| 256 | verify_block_addr(sbi, fio->old_blkaddr); |
| 257 | verify_block_addr(sbi, fio->new_blkaddr); |
Jaegeuk Kim | 93dfe2a | 2013-11-30 12:51:14 +0900 | [diff] [blame] | 258 | |
Chao Yu | df0f8dc | 2014-03-22 14:57:23 +0800 | [diff] [blame] | 259 | down_write(&io->io_rwsem); |
Jaegeuk Kim | 93dfe2a | 2013-11-30 12:51:14 +0900 | [diff] [blame] | 260 | |
Chao Yu | 7a9d754 | 2016-02-22 18:36:38 +0800 | [diff] [blame] | 261 | if (io->bio && (io->last_block_in_bio != fio->new_blkaddr - 1 || |
Jaegeuk Kim | 458e619 | 2013-12-11 13:54:01 +0900 | [diff] [blame] | 262 | io->fio.rw != fio->rw)) |
| 263 | __submit_merged_bio(io); |
Jaegeuk Kim | 93dfe2a | 2013-11-30 12:51:14 +0900 | [diff] [blame] | 264 | alloc_new: |
| 265 | if (io->bio == NULL) { |
Jaegeuk Kim | 90a893c | 2014-09-22 16:21:07 -0700 | [diff] [blame] | 266 | int bio_blocks = MAX_BIO_BLOCKS(sbi); |
Gu Zheng | 940a6d3 | 2013-12-20 17:39:59 +0800 | [diff] [blame] | 267 | |
Chao Yu | 7a9d754 | 2016-02-22 18:36:38 +0800 | [diff] [blame] | 268 | io->bio = __bio_alloc(sbi, fio->new_blkaddr, |
| 269 | bio_blocks, is_read); |
Jaegeuk Kim | 458e619 | 2013-12-11 13:54:01 +0900 | [diff] [blame] | 270 | io->fio = *fio; |
Jaegeuk Kim | 93dfe2a | 2013-11-30 12:51:14 +0900 | [diff] [blame] | 271 | } |
| 272 | |
Jaegeuk Kim | 4375a33 | 2015-04-23 12:04:33 -0700 | [diff] [blame] | 273 | bio_page = fio->encrypted_page ? fio->encrypted_page : fio->page; |
| 274 | |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 275 | if (bio_add_page(io->bio, bio_page, PAGE_SIZE, 0) < |
| 276 | PAGE_SIZE) { |
Jaegeuk Kim | 458e619 | 2013-12-11 13:54:01 +0900 | [diff] [blame] | 277 | __submit_merged_bio(io); |
Jaegeuk Kim | 93dfe2a | 2013-11-30 12:51:14 +0900 | [diff] [blame] | 278 | goto alloc_new; |
| 279 | } |
| 280 | |
Chao Yu | 7a9d754 | 2016-02-22 18:36:38 +0800 | [diff] [blame] | 281 | io->last_block_in_bio = fio->new_blkaddr; |
Jaegeuk Kim | 05ca363 | 2015-04-23 14:38:15 -0700 | [diff] [blame] | 282 | f2fs_trace_ios(fio, 0); |
Jaegeuk Kim | 93dfe2a | 2013-11-30 12:51:14 +0900 | [diff] [blame] | 283 | |
Chao Yu | df0f8dc | 2014-03-22 14:57:23 +0800 | [diff] [blame] | 284 | up_write(&io->io_rwsem); |
Jaegeuk Kim | 05ca363 | 2015-04-23 14:38:15 -0700 | [diff] [blame] | 285 | trace_f2fs_submit_page_mbio(fio->page, fio); |
Jaegeuk Kim | 93dfe2a | 2013-11-30 12:51:14 +0900 | [diff] [blame] | 286 | } |
| 287 | |
Chao Yu | 46008c6 | 2016-05-09 19:56:30 +0800 | [diff] [blame] | 288 | static void __set_data_blkaddr(struct dnode_of_data *dn) |
| 289 | { |
| 290 | struct f2fs_node *rn = F2FS_NODE(dn->node_page); |
| 291 | __le32 *addr_array; |
| 292 | |
| 293 | /* Get physical address of data block */ |
| 294 | addr_array = blkaddr_in_node(rn); |
| 295 | addr_array[dn->ofs_in_node] = cpu_to_le32(dn->data_blkaddr); |
| 296 | } |
| 297 | |
Jaegeuk Kim | 93dfe2a | 2013-11-30 12:51:14 +0900 | [diff] [blame] | 298 | /* |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 299 | * Lock ordering for the change of data block address: |
| 300 | * ->data_page |
| 301 | * ->node_page |
| 302 | * update block addresses in the node page |
| 303 | */ |
Chao Yu | 216a620 | 2015-03-19 19:23:32 +0800 | [diff] [blame] | 304 | void set_data_blkaddr(struct dnode_of_data *dn) |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 305 | { |
Chao Yu | 46008c6 | 2016-05-09 19:56:30 +0800 | [diff] [blame] | 306 | f2fs_wait_on_page_writeback(dn->node_page, NODE, true); |
| 307 | __set_data_blkaddr(dn); |
| 308 | if (set_page_dirty(dn->node_page)) |
Jaegeuk Kim | 12719ae | 2016-01-07 13:23:12 -0800 | [diff] [blame] | 309 | dn->node_changed = true; |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 310 | } |
| 311 | |
Chao Yu | f28b343 | 2016-02-24 17:16:47 +0800 | [diff] [blame] | 312 | void f2fs_update_data_blkaddr(struct dnode_of_data *dn, block_t blkaddr) |
| 313 | { |
| 314 | dn->data_blkaddr = blkaddr; |
| 315 | set_data_blkaddr(dn); |
| 316 | f2fs_update_extent_cache(dn); |
| 317 | } |
| 318 | |
Chao Yu | 46008c6 | 2016-05-09 19:56:30 +0800 | [diff] [blame] | 319 | /* dn->ofs_in_node will be returned with up-to-date last block pointer */ |
| 320 | int reserve_new_blocks(struct dnode_of_data *dn, blkcnt_t count) |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 321 | { |
Jaegeuk Kim | 4081363 | 2014-09-02 15:31:18 -0700 | [diff] [blame] | 322 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 323 | |
Chao Yu | 46008c6 | 2016-05-09 19:56:30 +0800 | [diff] [blame] | 324 | if (!count) |
| 325 | return 0; |
| 326 | |
Jaegeuk Kim | 9194232 | 2016-05-20 10:13:22 -0700 | [diff] [blame] | 327 | if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC))) |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 328 | return -EPERM; |
Chao Yu | 46008c6 | 2016-05-09 19:56:30 +0800 | [diff] [blame] | 329 | if (unlikely(!inc_valid_block_count(sbi, dn->inode, &count))) |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 330 | return -ENOSPC; |
| 331 | |
Chao Yu | 46008c6 | 2016-05-09 19:56:30 +0800 | [diff] [blame] | 332 | trace_f2fs_reserve_new_blocks(dn->inode, dn->nid, |
| 333 | dn->ofs_in_node, count); |
Namjae Jeon | c01e285 | 2013-04-23 17:00:52 +0900 | [diff] [blame] | 334 | |
Chao Yu | 46008c6 | 2016-05-09 19:56:30 +0800 | [diff] [blame] | 335 | f2fs_wait_on_page_writeback(dn->node_page, NODE, true); |
| 336 | |
| 337 | for (; count > 0; dn->ofs_in_node++) { |
| 338 | block_t blkaddr = |
| 339 | datablock_addr(dn->node_page, dn->ofs_in_node); |
| 340 | if (blkaddr == NULL_ADDR) { |
| 341 | dn->data_blkaddr = NEW_ADDR; |
| 342 | __set_data_blkaddr(dn); |
| 343 | count--; |
| 344 | } |
| 345 | } |
| 346 | |
| 347 | if (set_page_dirty(dn->node_page)) |
| 348 | dn->node_changed = true; |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 349 | return 0; |
| 350 | } |
| 351 | |
Chao Yu | 46008c6 | 2016-05-09 19:56:30 +0800 | [diff] [blame] | 352 | /* Should keep dn->ofs_in_node unchanged */ |
| 353 | int reserve_new_block(struct dnode_of_data *dn) |
| 354 | { |
| 355 | unsigned int ofs_in_node = dn->ofs_in_node; |
| 356 | int ret; |
| 357 | |
| 358 | ret = reserve_new_blocks(dn, 1); |
| 359 | dn->ofs_in_node = ofs_in_node; |
| 360 | return ret; |
| 361 | } |
| 362 | |
Huajun Li | b600965 | 2013-11-10 23:13:18 +0800 | [diff] [blame] | 363 | int f2fs_reserve_block(struct dnode_of_data *dn, pgoff_t index) |
| 364 | { |
| 365 | bool need_put = dn->inode_page ? false : true; |
| 366 | int err; |
| 367 | |
| 368 | err = get_dnode_of_data(dn, index, ALLOC_NODE); |
| 369 | if (err) |
| 370 | return err; |
Jaegeuk Kim | a886537 | 2013-12-27 17:04:17 +0900 | [diff] [blame] | 371 | |
Huajun Li | b600965 | 2013-11-10 23:13:18 +0800 | [diff] [blame] | 372 | if (dn->data_blkaddr == NULL_ADDR) |
| 373 | err = reserve_new_block(dn); |
Jaegeuk Kim | a886537 | 2013-12-27 17:04:17 +0900 | [diff] [blame] | 374 | if (err || need_put) |
Huajun Li | b600965 | 2013-11-10 23:13:18 +0800 | [diff] [blame] | 375 | f2fs_put_dnode(dn); |
| 376 | return err; |
| 377 | } |
| 378 | |
Fan Li | 759af1c | 2015-08-05 15:52:16 +0800 | [diff] [blame] | 379 | int f2fs_get_block(struct dnode_of_data *dn, pgoff_t index) |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 380 | { |
Chao Yu | 028a41e | 2015-03-19 19:26:02 +0800 | [diff] [blame] | 381 | struct extent_info ei; |
Fan Li | 759af1c | 2015-08-05 15:52:16 +0800 | [diff] [blame] | 382 | struct inode *inode = dn->inode; |
Chao Yu | 028a41e | 2015-03-19 19:26:02 +0800 | [diff] [blame] | 383 | |
Fan Li | 759af1c | 2015-08-05 15:52:16 +0800 | [diff] [blame] | 384 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { |
| 385 | dn->data_blkaddr = ei.blk + index - ei.fofs; |
| 386 | return 0; |
Chao Yu | 429511c | 2015-02-05 17:54:31 +0800 | [diff] [blame] | 387 | } |
| 388 | |
Fan Li | 759af1c | 2015-08-05 15:52:16 +0800 | [diff] [blame] | 389 | return f2fs_reserve_block(dn, index); |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 390 | } |
| 391 | |
Jaegeuk Kim | a56c7c6 | 2015-10-09 15:11:38 -0700 | [diff] [blame] | 392 | struct page *get_read_data_page(struct inode *inode, pgoff_t index, |
| 393 | int rw, bool for_write) |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 394 | { |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 395 | struct address_space *mapping = inode->i_mapping; |
| 396 | struct dnode_of_data dn; |
| 397 | struct page *page; |
Chao Yu | cb3bc9e | 2015-02-05 18:03:40 +0800 | [diff] [blame] | 398 | struct extent_info ei; |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 399 | int err; |
Jaegeuk Kim | cf04e8e | 2014-12-17 19:33:13 -0800 | [diff] [blame] | 400 | struct f2fs_io_info fio = { |
Jaegeuk Kim | 05ca363 | 2015-04-23 14:38:15 -0700 | [diff] [blame] | 401 | .sbi = F2FS_I_SB(inode), |
Jaegeuk Kim | cf04e8e | 2014-12-17 19:33:13 -0800 | [diff] [blame] | 402 | .type = DATA, |
Jaegeuk Kim | 43f3eae | 2015-04-30 17:00:33 -0700 | [diff] [blame] | 403 | .rw = rw, |
Jaegeuk Kim | 4375a33 | 2015-04-23 12:04:33 -0700 | [diff] [blame] | 404 | .encrypted_page = NULL, |
Jaegeuk Kim | cf04e8e | 2014-12-17 19:33:13 -0800 | [diff] [blame] | 405 | }; |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 406 | |
Jaegeuk Kim | 4375a33 | 2015-04-23 12:04:33 -0700 | [diff] [blame] | 407 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) |
| 408 | return read_mapping_page(mapping, index, NULL); |
| 409 | |
Jaegeuk Kim | a56c7c6 | 2015-10-09 15:11:38 -0700 | [diff] [blame] | 410 | page = f2fs_grab_cache_page(mapping, index, for_write); |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 411 | if (!page) |
| 412 | return ERR_PTR(-ENOMEM); |
| 413 | |
Chao Yu | cb3bc9e | 2015-02-05 18:03:40 +0800 | [diff] [blame] | 414 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { |
| 415 | dn.data_blkaddr = ei.blk + index - ei.fofs; |
| 416 | goto got_it; |
| 417 | } |
| 418 | |
Jaegeuk Kim | 650495d | 2013-05-13 08:38:35 +0900 | [diff] [blame] | 419 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
| 420 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); |
Jaegeuk Kim | 86531d6 | 2015-07-15 13:08:21 -0700 | [diff] [blame] | 421 | if (err) |
| 422 | goto put_err; |
Jaegeuk Kim | 650495d | 2013-05-13 08:38:35 +0900 | [diff] [blame] | 423 | f2fs_put_dnode(&dn); |
| 424 | |
Jaegeuk Kim | 6bacf52 | 2013-12-06 15:00:58 +0900 | [diff] [blame] | 425 | if (unlikely(dn.data_blkaddr == NULL_ADDR)) { |
Jaegeuk Kim | 86531d6 | 2015-07-15 13:08:21 -0700 | [diff] [blame] | 426 | err = -ENOENT; |
| 427 | goto put_err; |
Jaegeuk Kim | 650495d | 2013-05-13 08:38:35 +0900 | [diff] [blame] | 428 | } |
Chao Yu | cb3bc9e | 2015-02-05 18:03:40 +0800 | [diff] [blame] | 429 | got_it: |
Jaegeuk Kim | 43f3eae | 2015-04-30 17:00:33 -0700 | [diff] [blame] | 430 | if (PageUptodate(page)) { |
| 431 | unlock_page(page); |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 432 | return page; |
Jaegeuk Kim | 43f3eae | 2015-04-30 17:00:33 -0700 | [diff] [blame] | 433 | } |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 434 | |
Jaegeuk Kim | d59ff4d | 2013-08-20 19:13:07 +0900 | [diff] [blame] | 435 | /* |
| 436 | * A new dentry page is allocated but not able to be written, since its |
| 437 | * new inode page couldn't be allocated due to -ENOSPC. |
| 438 | * In such the case, its blkaddr can be remained as NEW_ADDR. |
| 439 | * see, f2fs_add_link -> get_new_data_page -> init_inode_metadata. |
| 440 | */ |
| 441 | if (dn.data_blkaddr == NEW_ADDR) { |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 442 | zero_user_segment(page, 0, PAGE_SIZE); |
Jaegeuk Kim | d59ff4d | 2013-08-20 19:13:07 +0900 | [diff] [blame] | 443 | SetPageUptodate(page); |
Jaegeuk Kim | 43f3eae | 2015-04-30 17:00:33 -0700 | [diff] [blame] | 444 | unlock_page(page); |
Jaegeuk Kim | d59ff4d | 2013-08-20 19:13:07 +0900 | [diff] [blame] | 445 | return page; |
| 446 | } |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 447 | |
Chao Yu | 7a9d754 | 2016-02-22 18:36:38 +0800 | [diff] [blame] | 448 | fio.new_blkaddr = fio.old_blkaddr = dn.data_blkaddr; |
Jaegeuk Kim | 05ca363 | 2015-04-23 14:38:15 -0700 | [diff] [blame] | 449 | fio.page = page; |
| 450 | err = f2fs_submit_page_bio(&fio); |
Jaegeuk Kim | 393ff91 | 2013-03-08 21:29:23 +0900 | [diff] [blame] | 451 | if (err) |
Jaegeuk Kim | 86531d6 | 2015-07-15 13:08:21 -0700 | [diff] [blame] | 452 | goto put_err; |
Jaegeuk Kim | 43f3eae | 2015-04-30 17:00:33 -0700 | [diff] [blame] | 453 | return page; |
Jaegeuk Kim | 86531d6 | 2015-07-15 13:08:21 -0700 | [diff] [blame] | 454 | |
| 455 | put_err: |
| 456 | f2fs_put_page(page, 1); |
| 457 | return ERR_PTR(err); |
Jaegeuk Kim | 43f3eae | 2015-04-30 17:00:33 -0700 | [diff] [blame] | 458 | } |
Jaegeuk Kim | 393ff91 | 2013-03-08 21:29:23 +0900 | [diff] [blame] | 459 | |
Jaegeuk Kim | 43f3eae | 2015-04-30 17:00:33 -0700 | [diff] [blame] | 460 | struct page *find_data_page(struct inode *inode, pgoff_t index) |
| 461 | { |
| 462 | struct address_space *mapping = inode->i_mapping; |
| 463 | struct page *page; |
| 464 | |
| 465 | page = find_get_page(mapping, index); |
| 466 | if (page && PageUptodate(page)) |
| 467 | return page; |
| 468 | f2fs_put_page(page, 0); |
| 469 | |
Jaegeuk Kim | a56c7c6 | 2015-10-09 15:11:38 -0700 | [diff] [blame] | 470 | page = get_read_data_page(inode, index, READ_SYNC, false); |
Jaegeuk Kim | 43f3eae | 2015-04-30 17:00:33 -0700 | [diff] [blame] | 471 | if (IS_ERR(page)) |
| 472 | return page; |
| 473 | |
| 474 | if (PageUptodate(page)) |
| 475 | return page; |
| 476 | |
| 477 | wait_on_page_locked(page); |
| 478 | if (unlikely(!PageUptodate(page))) { |
| 479 | f2fs_put_page(page, 0); |
| 480 | return ERR_PTR(-EIO); |
| 481 | } |
| 482 | return page; |
| 483 | } |
| 484 | |
| 485 | /* |
| 486 | * If it tries to access a hole, return an error. |
| 487 | * Because, the callers, functions in dir.c and GC, should be able to know |
| 488 | * whether this page exists or not. |
| 489 | */ |
Jaegeuk Kim | a56c7c6 | 2015-10-09 15:11:38 -0700 | [diff] [blame] | 490 | struct page *get_lock_data_page(struct inode *inode, pgoff_t index, |
| 491 | bool for_write) |
Jaegeuk Kim | 43f3eae | 2015-04-30 17:00:33 -0700 | [diff] [blame] | 492 | { |
| 493 | struct address_space *mapping = inode->i_mapping; |
| 494 | struct page *page; |
| 495 | repeat: |
Jaegeuk Kim | a56c7c6 | 2015-10-09 15:11:38 -0700 | [diff] [blame] | 496 | page = get_read_data_page(inode, index, READ_SYNC, for_write); |
Jaegeuk Kim | 43f3eae | 2015-04-30 17:00:33 -0700 | [diff] [blame] | 497 | if (IS_ERR(page)) |
| 498 | return page; |
| 499 | |
| 500 | /* wait for read completion */ |
Jaegeuk Kim | 393ff91 | 2013-03-08 21:29:23 +0900 | [diff] [blame] | 501 | lock_page(page); |
Jaegeuk Kim | 6bacf52 | 2013-12-06 15:00:58 +0900 | [diff] [blame] | 502 | if (unlikely(!PageUptodate(page))) { |
Jaegeuk Kim | 393ff91 | 2013-03-08 21:29:23 +0900 | [diff] [blame] | 503 | f2fs_put_page(page, 1); |
| 504 | return ERR_PTR(-EIO); |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 505 | } |
Jaegeuk Kim | 6bacf52 | 2013-12-06 15:00:58 +0900 | [diff] [blame] | 506 | if (unlikely(page->mapping != mapping)) { |
Jaegeuk Kim | afcb7ca0 | 2013-04-26 11:55:17 +0900 | [diff] [blame] | 507 | f2fs_put_page(page, 1); |
| 508 | goto repeat; |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 509 | } |
| 510 | return page; |
| 511 | } |
| 512 | |
Jaegeuk Kim | 0a8165d | 2012-11-29 13:28:09 +0900 | [diff] [blame] | 513 | /* |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 514 | * Caller ensures that this data page is never allocated. |
| 515 | * A new zero-filled data page is allocated in the page cache. |
Jaegeuk Kim | 3993683 | 2012-11-22 16:21:29 +0900 | [diff] [blame] | 516 | * |
Chao Yu | 4f4124d | 2013-12-21 18:02:14 +0800 | [diff] [blame] | 517 | * Also, caller should grab and release a rwsem by calling f2fs_lock_op() and |
| 518 | * f2fs_unlock_op(). |
Chao Yu | 470f00e | 2015-07-14 18:14:06 +0800 | [diff] [blame] | 519 | * Note that, ipage is set only by make_empty_dir, and if any error occur, |
| 520 | * ipage should be released by this function. |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 521 | */ |
Jaegeuk Kim | 64aa7ed | 2013-05-20 09:55:50 +0900 | [diff] [blame] | 522 | struct page *get_new_data_page(struct inode *inode, |
Jaegeuk Kim | a886537 | 2013-12-27 17:04:17 +0900 | [diff] [blame] | 523 | struct page *ipage, pgoff_t index, bool new_i_size) |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 524 | { |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 525 | struct address_space *mapping = inode->i_mapping; |
| 526 | struct page *page; |
| 527 | struct dnode_of_data dn; |
| 528 | int err; |
Jaegeuk Kim | 7612118 | 2016-01-01 22:03:47 -0800 | [diff] [blame] | 529 | |
Jaegeuk Kim | a56c7c6 | 2015-10-09 15:11:38 -0700 | [diff] [blame] | 530 | page = f2fs_grab_cache_page(mapping, index, true); |
Chao Yu | 470f00e | 2015-07-14 18:14:06 +0800 | [diff] [blame] | 531 | if (!page) { |
| 532 | /* |
| 533 | * before exiting, we should make sure ipage will be released |
| 534 | * if any error occur. |
| 535 | */ |
| 536 | f2fs_put_page(ipage, 1); |
Jaegeuk Kim | 01f2861 | 2015-04-29 11:18:42 -0700 | [diff] [blame] | 537 | return ERR_PTR(-ENOMEM); |
Chao Yu | 470f00e | 2015-07-14 18:14:06 +0800 | [diff] [blame] | 538 | } |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 539 | |
Jaegeuk Kim | a886537 | 2013-12-27 17:04:17 +0900 | [diff] [blame] | 540 | set_new_dnode(&dn, inode, ipage, NULL, 0); |
Huajun Li | b600965 | 2013-11-10 23:13:18 +0800 | [diff] [blame] | 541 | err = f2fs_reserve_block(&dn, index); |
Jaegeuk Kim | 01f2861 | 2015-04-29 11:18:42 -0700 | [diff] [blame] | 542 | if (err) { |
| 543 | f2fs_put_page(page, 1); |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 544 | return ERR_PTR(err); |
Jaegeuk Kim | a886537 | 2013-12-27 17:04:17 +0900 | [diff] [blame] | 545 | } |
Jaegeuk Kim | 01f2861 | 2015-04-29 11:18:42 -0700 | [diff] [blame] | 546 | if (!ipage) |
| 547 | f2fs_put_dnode(&dn); |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 548 | |
| 549 | if (PageUptodate(page)) |
Jaegeuk Kim | 01f2861 | 2015-04-29 11:18:42 -0700 | [diff] [blame] | 550 | goto got_it; |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 551 | |
| 552 | if (dn.data_blkaddr == NEW_ADDR) { |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 553 | zero_user_segment(page, 0, PAGE_SIZE); |
Jaegeuk Kim | 393ff91 | 2013-03-08 21:29:23 +0900 | [diff] [blame] | 554 | SetPageUptodate(page); |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 555 | } else { |
Jaegeuk Kim | 4375a33 | 2015-04-23 12:04:33 -0700 | [diff] [blame] | 556 | f2fs_put_page(page, 1); |
Jaegeuk Kim | a886537 | 2013-12-27 17:04:17 +0900 | [diff] [blame] | 557 | |
Jaegeuk Kim | 7612118 | 2016-01-01 22:03:47 -0800 | [diff] [blame] | 558 | /* if ipage exists, blkaddr should be NEW_ADDR */ |
| 559 | f2fs_bug_on(F2FS_I_SB(inode), ipage); |
| 560 | page = get_lock_data_page(inode, index, true); |
Jaegeuk Kim | 4375a33 | 2015-04-23 12:04:33 -0700 | [diff] [blame] | 561 | if (IS_ERR(page)) |
Jaegeuk Kim | 7612118 | 2016-01-01 22:03:47 -0800 | [diff] [blame] | 562 | return page; |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 563 | } |
Jaegeuk Kim | 01f2861 | 2015-04-29 11:18:42 -0700 | [diff] [blame] | 564 | got_it: |
Chao Yu | 9edcdab | 2015-09-11 14:43:52 +0800 | [diff] [blame] | 565 | if (new_i_size && i_size_read(inode) < |
Jaegeuk Kim | ee6d182 | 2016-05-20 16:32:49 -0700 | [diff] [blame] | 566 | ((loff_t)(index + 1) << PAGE_SHIFT)) |
Jaegeuk Kim | fc9581c | 2016-05-20 09:22:03 -0700 | [diff] [blame] | 567 | f2fs_i_size_write(inode, ((loff_t)(index + 1) << PAGE_SHIFT)); |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 568 | return page; |
| 569 | } |
| 570 | |
Jaegeuk Kim | bfad7c2 | 2013-12-16 19:04:05 +0900 | [diff] [blame] | 571 | static int __allocate_data_block(struct dnode_of_data *dn) |
| 572 | { |
Jaegeuk Kim | 4081363 | 2014-09-02 15:31:18 -0700 | [diff] [blame] | 573 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
Jaegeuk Kim | bfad7c2 | 2013-12-16 19:04:05 +0900 | [diff] [blame] | 574 | struct f2fs_summary sum; |
Jaegeuk Kim | bfad7c2 | 2013-12-16 19:04:05 +0900 | [diff] [blame] | 575 | struct node_info ni; |
Jaegeuk Kim | 38aa088 | 2015-01-05 16:02:20 -0800 | [diff] [blame] | 576 | int seg = CURSEG_WARM_DATA; |
Jaegeuk Kim | 976e4c5 | 2014-09-15 19:32:16 -0700 | [diff] [blame] | 577 | pgoff_t fofs; |
Chao Yu | 46008c6 | 2016-05-09 19:56:30 +0800 | [diff] [blame] | 578 | blkcnt_t count = 1; |
Jaegeuk Kim | bfad7c2 | 2013-12-16 19:04:05 +0900 | [diff] [blame] | 579 | |
Jaegeuk Kim | 9194232 | 2016-05-20 10:13:22 -0700 | [diff] [blame] | 580 | if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC))) |
Jaegeuk Kim | bfad7c2 | 2013-12-16 19:04:05 +0900 | [diff] [blame] | 581 | return -EPERM; |
Chao Yu | df6136e | 2015-03-23 10:33:37 +0800 | [diff] [blame] | 582 | |
| 583 | dn->data_blkaddr = datablock_addr(dn->node_page, dn->ofs_in_node); |
| 584 | if (dn->data_blkaddr == NEW_ADDR) |
| 585 | goto alloc; |
| 586 | |
Chao Yu | 46008c6 | 2016-05-09 19:56:30 +0800 | [diff] [blame] | 587 | if (unlikely(!inc_valid_block_count(sbi, dn->inode, &count))) |
Jaegeuk Kim | bfad7c2 | 2013-12-16 19:04:05 +0900 | [diff] [blame] | 588 | return -ENOSPC; |
| 589 | |
Chao Yu | df6136e | 2015-03-23 10:33:37 +0800 | [diff] [blame] | 590 | alloc: |
Jaegeuk Kim | bfad7c2 | 2013-12-16 19:04:05 +0900 | [diff] [blame] | 591 | get_node_info(sbi, dn->nid, &ni); |
| 592 | set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version); |
| 593 | |
Jaegeuk Kim | 38aa088 | 2015-01-05 16:02:20 -0800 | [diff] [blame] | 594 | if (dn->ofs_in_node == 0 && dn->inode_page == dn->node_page) |
| 595 | seg = CURSEG_DIRECT_IO; |
| 596 | |
Chao Yu | df6136e | 2015-03-23 10:33:37 +0800 | [diff] [blame] | 597 | allocate_data_block(sbi, NULL, dn->data_blkaddr, &dn->data_blkaddr, |
| 598 | &sum, seg); |
Chao Yu | 216a620 | 2015-03-19 19:23:32 +0800 | [diff] [blame] | 599 | set_data_blkaddr(dn); |
Jaegeuk Kim | bfad7c2 | 2013-12-16 19:04:05 +0900 | [diff] [blame] | 600 | |
Jaegeuk Kim | 976e4c5 | 2014-09-15 19:32:16 -0700 | [diff] [blame] | 601 | /* update i_size */ |
Chao Yu | 81ca735 | 2016-01-26 15:39:35 +0800 | [diff] [blame] | 602 | fofs = start_bidx_of_node(ofs_of_node(dn->node_page), dn->inode) + |
Jaegeuk Kim | 976e4c5 | 2014-09-15 19:32:16 -0700 | [diff] [blame] | 603 | dn->ofs_in_node; |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 604 | if (i_size_read(dn->inode) < ((loff_t)(fofs + 1) << PAGE_SHIFT)) |
Jaegeuk Kim | fc9581c | 2016-05-20 09:22:03 -0700 | [diff] [blame] | 605 | f2fs_i_size_write(dn->inode, |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 606 | ((loff_t)(fofs + 1) << PAGE_SHIFT)); |
Jaegeuk Kim | bfad7c2 | 2013-12-16 19:04:05 +0900 | [diff] [blame] | 607 | return 0; |
| 608 | } |
| 609 | |
Jaegeuk Kim | b439b10 | 2016-02-03 13:09:09 -0800 | [diff] [blame] | 610 | ssize_t f2fs_preallocate_blocks(struct kiocb *iocb, struct iov_iter *from) |
Jaegeuk Kim | 59b802e | 2015-02-09 12:09:53 -0800 | [diff] [blame] | 611 | { |
Jaegeuk Kim | b439b10 | 2016-02-03 13:09:09 -0800 | [diff] [blame] | 612 | struct inode *inode = file_inode(iocb->ki_filp); |
Chao Yu | 5b8db7f | 2016-01-26 15:38:29 +0800 | [diff] [blame] | 613 | struct f2fs_map_blocks map; |
Jaegeuk Kim | b439b10 | 2016-02-03 13:09:09 -0800 | [diff] [blame] | 614 | ssize_t ret = 0; |
Jaegeuk Kim | 59b802e | 2015-02-09 12:09:53 -0800 | [diff] [blame] | 615 | |
Jaegeuk Kim | 0080c50 | 2016-05-07 08:52:57 -0700 | [diff] [blame] | 616 | map.m_lblk = F2FS_BLK_ALIGN(iocb->ki_pos); |
| 617 | map.m_len = F2FS_BYTES_TO_BLK(iov_iter_count(from)); |
Chao Yu | da85985 | 2016-01-26 15:42:58 +0800 | [diff] [blame] | 618 | map.m_next_pgofs = NULL; |
Jaegeuk Kim | 59b802e | 2015-02-09 12:09:53 -0800 | [diff] [blame] | 619 | |
Jaegeuk Kim | 24b8491 | 2016-02-03 13:49:44 -0800 | [diff] [blame] | 620 | if (f2fs_encrypted_inode(inode)) |
| 621 | return 0; |
| 622 | |
| 623 | if (iocb->ki_flags & IOCB_DIRECT) { |
Jaegeuk Kim | b439b10 | 2016-02-03 13:09:09 -0800 | [diff] [blame] | 624 | ret = f2fs_convert_inline_inode(inode); |
| 625 | if (ret) |
| 626 | return ret; |
Jaegeuk Kim | 24b8491 | 2016-02-03 13:49:44 -0800 | [diff] [blame] | 627 | return f2fs_map_blocks(inode, &map, 1, F2FS_GET_BLOCK_PRE_DIO); |
Jaegeuk Kim | b439b10 | 2016-02-03 13:09:09 -0800 | [diff] [blame] | 628 | } |
Jaegeuk Kim | 24b8491 | 2016-02-03 13:49:44 -0800 | [diff] [blame] | 629 | if (iocb->ki_pos + iov_iter_count(from) > MAX_INLINE_DATA) { |
| 630 | ret = f2fs_convert_inline_inode(inode); |
| 631 | if (ret) |
| 632 | return ret; |
| 633 | } |
| 634 | if (!f2fs_has_inline_data(inode)) |
| 635 | return f2fs_map_blocks(inode, &map, 1, F2FS_GET_BLOCK_PRE_AIO); |
Jaegeuk Kim | b439b10 | 2016-02-03 13:09:09 -0800 | [diff] [blame] | 636 | return ret; |
Jaegeuk Kim | 59b802e | 2015-02-09 12:09:53 -0800 | [diff] [blame] | 637 | } |
| 638 | |
Jaegeuk Kim | 0a8165d | 2012-11-29 13:28:09 +0900 | [diff] [blame] | 639 | /* |
Jaegeuk Kim | 003a3e1 | 2015-04-06 19:55:34 -0700 | [diff] [blame] | 640 | * f2fs_map_blocks() now supported readahead/bmap/rw direct_IO with |
| 641 | * f2fs_map_blocks structure. |
Chao Yu | 4f4124d | 2013-12-21 18:02:14 +0800 | [diff] [blame] | 642 | * If original data blocks are allocated, then give them to blockdev. |
| 643 | * Otherwise, |
| 644 | * a. preallocate requested block addresses |
| 645 | * b. do not use extent cache for better performance |
| 646 | * c. give the block addresses to blockdev |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 647 | */ |
Chao Yu | d323d00 | 2015-10-27 09:53:45 +0800 | [diff] [blame] | 648 | int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map, |
Chao Yu | e2b4e2b | 2015-08-19 19:11:19 +0800 | [diff] [blame] | 649 | int create, int flag) |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 650 | { |
Jaegeuk Kim | 003a3e1 | 2015-04-06 19:55:34 -0700 | [diff] [blame] | 651 | unsigned int maxblocks = map->m_len; |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 652 | struct dnode_of_data dn; |
Chao Yu | f981170 | 2015-09-21 20:17:52 +0800 | [diff] [blame] | 653 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
Jaegeuk Kim | bfad7c2 | 2013-12-16 19:04:05 +0900 | [diff] [blame] | 654 | int mode = create ? ALLOC_NODE : LOOKUP_NODE_RA; |
Chao Yu | 46008c6 | 2016-05-09 19:56:30 +0800 | [diff] [blame] | 655 | pgoff_t pgofs, end_offset, end; |
Jaegeuk Kim | bfad7c2 | 2013-12-16 19:04:05 +0900 | [diff] [blame] | 656 | int err = 0, ofs = 1; |
Chao Yu | 46008c6 | 2016-05-09 19:56:30 +0800 | [diff] [blame] | 657 | unsigned int ofs_in_node, last_ofs_in_node; |
| 658 | blkcnt_t prealloc; |
Chao Yu | a2e7d1b | 2015-02-05 17:50:30 +0800 | [diff] [blame] | 659 | struct extent_info ei; |
Jaegeuk Kim | bfad7c2 | 2013-12-16 19:04:05 +0900 | [diff] [blame] | 660 | bool allocated = false; |
Fan Li | 7df3a43 | 2015-12-17 13:20:59 +0800 | [diff] [blame] | 661 | block_t blkaddr; |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 662 | |
Jaegeuk Kim | 003a3e1 | 2015-04-06 19:55:34 -0700 | [diff] [blame] | 663 | map->m_len = 0; |
| 664 | map->m_flags = 0; |
| 665 | |
| 666 | /* it only supports block size == page size */ |
| 667 | pgofs = (pgoff_t)map->m_lblk; |
Chao Yu | 46008c6 | 2016-05-09 19:56:30 +0800 | [diff] [blame] | 668 | end = pgofs + maxblocks; |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 669 | |
Jaegeuk Kim | 24b8491 | 2016-02-03 13:49:44 -0800 | [diff] [blame] | 670 | if (!create && f2fs_lookup_extent_cache(inode, pgofs, &ei)) { |
Jaegeuk Kim | 003a3e1 | 2015-04-06 19:55:34 -0700 | [diff] [blame] | 671 | map->m_pblk = ei.blk + pgofs - ei.fofs; |
| 672 | map->m_len = min((pgoff_t)maxblocks, ei.fofs + ei.len - pgofs); |
| 673 | map->m_flags = F2FS_MAP_MAPPED; |
Jaegeuk Kim | bfad7c2 | 2013-12-16 19:04:05 +0900 | [diff] [blame] | 674 | goto out; |
Chao Yu | a2e7d1b | 2015-02-05 17:50:30 +0800 | [diff] [blame] | 675 | } |
Jaegeuk Kim | bfad7c2 | 2013-12-16 19:04:05 +0900 | [diff] [blame] | 676 | |
Chao Yu | 4fe71e8 | 2016-01-26 15:37:38 +0800 | [diff] [blame] | 677 | next_dnode: |
Jaegeuk Kim | 59b802e | 2015-02-09 12:09:53 -0800 | [diff] [blame] | 678 | if (create) |
Chao Yu | 3104af3 | 2015-12-23 17:11:43 +0800 | [diff] [blame] | 679 | f2fs_lock_op(sbi); |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 680 | |
| 681 | /* When reading holes, we need its node page */ |
| 682 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
Jaegeuk Kim | bfad7c2 | 2013-12-16 19:04:05 +0900 | [diff] [blame] | 683 | err = get_dnode_of_data(&dn, pgofs, mode); |
Jaegeuk Kim | 1ec7908 | 2013-12-26 16:55:22 +0900 | [diff] [blame] | 684 | if (err) { |
Chao Yu | 43473f9 | 2016-05-05 19:13:02 +0800 | [diff] [blame] | 685 | if (flag == F2FS_GET_BLOCK_BMAP) |
| 686 | map->m_pblk = 0; |
Chao Yu | da85985 | 2016-01-26 15:42:58 +0800 | [diff] [blame] | 687 | if (err == -ENOENT) { |
Jaegeuk Kim | bfad7c2 | 2013-12-16 19:04:05 +0900 | [diff] [blame] | 688 | err = 0; |
Chao Yu | da85985 | 2016-01-26 15:42:58 +0800 | [diff] [blame] | 689 | if (map->m_next_pgofs) |
| 690 | *map->m_next_pgofs = |
| 691 | get_next_page_offset(&dn, pgofs); |
| 692 | } |
Jaegeuk Kim | bfad7c2 | 2013-12-16 19:04:05 +0900 | [diff] [blame] | 693 | goto unlock_out; |
Namjae Jeon | 848753a | 2013-04-23 16:38:02 +0900 | [diff] [blame] | 694 | } |
Chao Yu | 973163f | 2015-09-18 16:51:51 +0800 | [diff] [blame] | 695 | |
Chao Yu | 46008c6 | 2016-05-09 19:56:30 +0800 | [diff] [blame] | 696 | prealloc = 0; |
| 697 | ofs_in_node = dn.ofs_in_node; |
Chao Yu | 81ca735 | 2016-01-26 15:39:35 +0800 | [diff] [blame] | 698 | end_offset = ADDRS_PER_PAGE(dn.node_page, inode); |
Jaegeuk Kim | bfad7c2 | 2013-12-16 19:04:05 +0900 | [diff] [blame] | 699 | |
Chao Yu | 4fe71e8 | 2016-01-26 15:37:38 +0800 | [diff] [blame] | 700 | next_block: |
Fan Li | 7df3a43 | 2015-12-17 13:20:59 +0800 | [diff] [blame] | 701 | blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node); |
Chao Yu | 973163f | 2015-09-18 16:51:51 +0800 | [diff] [blame] | 702 | |
Fan Li | 7df3a43 | 2015-12-17 13:20:59 +0800 | [diff] [blame] | 703 | if (blkaddr == NEW_ADDR || blkaddr == NULL_ADDR) { |
| 704 | if (create) { |
| 705 | if (unlikely(f2fs_cp_error(sbi))) { |
| 706 | err = -EIO; |
| 707 | goto sync_out; |
Chao Yu | 973163f | 2015-09-18 16:51:51 +0800 | [diff] [blame] | 708 | } |
Jaegeuk Kim | 24b8491 | 2016-02-03 13:49:44 -0800 | [diff] [blame] | 709 | if (flag == F2FS_GET_BLOCK_PRE_AIO) { |
Chao Yu | 46008c6 | 2016-05-09 19:56:30 +0800 | [diff] [blame] | 710 | if (blkaddr == NULL_ADDR) { |
| 711 | prealloc++; |
| 712 | last_ofs_in_node = dn.ofs_in_node; |
| 713 | } |
Jaegeuk Kim | 24b8491 | 2016-02-03 13:49:44 -0800 | [diff] [blame] | 714 | } else { |
| 715 | err = __allocate_data_block(&dn); |
Chao Yu | 46008c6 | 2016-05-09 19:56:30 +0800 | [diff] [blame] | 716 | if (!err) { |
Jaegeuk Kim | 9194232 | 2016-05-20 10:13:22 -0700 | [diff] [blame] | 717 | set_inode_flag(inode, FI_APPEND_WRITE); |
Chao Yu | 46008c6 | 2016-05-09 19:56:30 +0800 | [diff] [blame] | 718 | allocated = true; |
| 719 | } |
Jaegeuk Kim | 24b8491 | 2016-02-03 13:49:44 -0800 | [diff] [blame] | 720 | } |
Fan Li | 7df3a43 | 2015-12-17 13:20:59 +0800 | [diff] [blame] | 721 | if (err) |
| 722 | goto sync_out; |
Chao Yu | 4fe71e8 | 2016-01-26 15:37:38 +0800 | [diff] [blame] | 723 | map->m_flags = F2FS_MAP_NEW; |
Fan Li | 7df3a43 | 2015-12-17 13:20:59 +0800 | [diff] [blame] | 724 | blkaddr = dn.data_blkaddr; |
| 725 | } else { |
Chao Yu | 43473f9 | 2016-05-05 19:13:02 +0800 | [diff] [blame] | 726 | if (flag == F2FS_GET_BLOCK_BMAP) { |
| 727 | map->m_pblk = 0; |
| 728 | goto sync_out; |
| 729 | } |
Chao Yu | da85985 | 2016-01-26 15:42:58 +0800 | [diff] [blame] | 730 | if (flag == F2FS_GET_BLOCK_FIEMAP && |
| 731 | blkaddr == NULL_ADDR) { |
| 732 | if (map->m_next_pgofs) |
| 733 | *map->m_next_pgofs = pgofs + 1; |
| 734 | } |
Fan Li | 7df3a43 | 2015-12-17 13:20:59 +0800 | [diff] [blame] | 735 | if (flag != F2FS_GET_BLOCK_FIEMAP || |
Chao Yu | 43473f9 | 2016-05-05 19:13:02 +0800 | [diff] [blame] | 736 | blkaddr != NEW_ADDR) |
Fan Li | 7df3a43 | 2015-12-17 13:20:59 +0800 | [diff] [blame] | 737 | goto sync_out; |
Jaegeuk Kim | bfad7c2 | 2013-12-16 19:04:05 +0900 | [diff] [blame] | 738 | } |
| 739 | } |
Fan Li | 7df3a43 | 2015-12-17 13:20:59 +0800 | [diff] [blame] | 740 | |
Chao Yu | 46008c6 | 2016-05-09 19:56:30 +0800 | [diff] [blame] | 741 | if (flag == F2FS_GET_BLOCK_PRE_AIO) |
| 742 | goto skip; |
| 743 | |
Chao Yu | 4fe71e8 | 2016-01-26 15:37:38 +0800 | [diff] [blame] | 744 | if (map->m_len == 0) { |
| 745 | /* preallocated unwritten block should be mapped for fiemap. */ |
| 746 | if (blkaddr == NEW_ADDR) |
| 747 | map->m_flags |= F2FS_MAP_UNWRITTEN; |
| 748 | map->m_flags |= F2FS_MAP_MAPPED; |
| 749 | |
| 750 | map->m_pblk = blkaddr; |
| 751 | map->m_len = 1; |
| 752 | } else if ((map->m_pblk != NEW_ADDR && |
Fan Li | 7df3a43 | 2015-12-17 13:20:59 +0800 | [diff] [blame] | 753 | blkaddr == (map->m_pblk + ofs)) || |
Jaegeuk Kim | b439b10 | 2016-02-03 13:09:09 -0800 | [diff] [blame] | 754 | (map->m_pblk == NEW_ADDR && blkaddr == NEW_ADDR) || |
Chao Yu | 46008c6 | 2016-05-09 19:56:30 +0800 | [diff] [blame] | 755 | flag == F2FS_GET_BLOCK_PRE_DIO) { |
Fan Li | 7df3a43 | 2015-12-17 13:20:59 +0800 | [diff] [blame] | 756 | ofs++; |
Fan Li | 7df3a43 | 2015-12-17 13:20:59 +0800 | [diff] [blame] | 757 | map->m_len++; |
Chao Yu | 4fe71e8 | 2016-01-26 15:37:38 +0800 | [diff] [blame] | 758 | } else { |
| 759 | goto sync_out; |
| 760 | } |
| 761 | |
Chao Yu | 46008c6 | 2016-05-09 19:56:30 +0800 | [diff] [blame] | 762 | skip: |
Chao Yu | 4fe71e8 | 2016-01-26 15:37:38 +0800 | [diff] [blame] | 763 | dn.ofs_in_node++; |
| 764 | pgofs++; |
| 765 | |
Chao Yu | 46008c6 | 2016-05-09 19:56:30 +0800 | [diff] [blame] | 766 | /* preallocate blocks in batch for one dnode page */ |
| 767 | if (flag == F2FS_GET_BLOCK_PRE_AIO && |
| 768 | (pgofs == end || dn.ofs_in_node == end_offset)) { |
Chao Yu | 4fe71e8 | 2016-01-26 15:37:38 +0800 | [diff] [blame] | 769 | |
Chao Yu | 46008c6 | 2016-05-09 19:56:30 +0800 | [diff] [blame] | 770 | dn.ofs_in_node = ofs_in_node; |
| 771 | err = reserve_new_blocks(&dn, prealloc); |
| 772 | if (err) |
| 773 | goto sync_out; |
Chao Yu | 4fe71e8 | 2016-01-26 15:37:38 +0800 | [diff] [blame] | 774 | |
Chao Yu | 46008c6 | 2016-05-09 19:56:30 +0800 | [diff] [blame] | 775 | map->m_len += dn.ofs_in_node - ofs_in_node; |
| 776 | if (prealloc && dn.ofs_in_node != last_ofs_in_node + 1) { |
| 777 | err = -ENOSPC; |
| 778 | goto sync_out; |
Chao Yu | 4fe71e8 | 2016-01-26 15:37:38 +0800 | [diff] [blame] | 779 | } |
Chao Yu | 46008c6 | 2016-05-09 19:56:30 +0800 | [diff] [blame] | 780 | dn.ofs_in_node = end_offset; |
Fan Li | 7df3a43 | 2015-12-17 13:20:59 +0800 | [diff] [blame] | 781 | } |
| 782 | |
Chao Yu | 46008c6 | 2016-05-09 19:56:30 +0800 | [diff] [blame] | 783 | if (pgofs >= end) |
| 784 | goto sync_out; |
| 785 | else if (dn.ofs_in_node < end_offset) |
| 786 | goto next_block; |
| 787 | |
Chao Yu | 46008c6 | 2016-05-09 19:56:30 +0800 | [diff] [blame] | 788 | f2fs_put_dnode(&dn); |
| 789 | |
| 790 | if (create) { |
| 791 | f2fs_unlock_op(sbi); |
| 792 | f2fs_balance_fs(sbi, allocated); |
| 793 | } |
| 794 | allocated = false; |
| 795 | goto next_dnode; |
| 796 | |
Jaegeuk Kim | bfad7c2 | 2013-12-16 19:04:05 +0900 | [diff] [blame] | 797 | sync_out: |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 798 | f2fs_put_dnode(&dn); |
Jaegeuk Kim | bfad7c2 | 2013-12-16 19:04:05 +0900 | [diff] [blame] | 799 | unlock_out: |
Jaegeuk Kim | 2a34076 | 2015-12-22 13:23:35 -0800 | [diff] [blame] | 800 | if (create) { |
Chao Yu | 3104af3 | 2015-12-23 17:11:43 +0800 | [diff] [blame] | 801 | f2fs_unlock_op(sbi); |
Jaegeuk Kim | 3c082b7 | 2016-01-23 13:35:18 -0800 | [diff] [blame] | 802 | f2fs_balance_fs(sbi, allocated); |
Jaegeuk Kim | 2a34076 | 2015-12-22 13:23:35 -0800 | [diff] [blame] | 803 | } |
Jaegeuk Kim | bfad7c2 | 2013-12-16 19:04:05 +0900 | [diff] [blame] | 804 | out: |
Jaegeuk Kim | 003a3e1 | 2015-04-06 19:55:34 -0700 | [diff] [blame] | 805 | trace_f2fs_map_blocks(inode, map, err); |
Jaegeuk Kim | bfad7c2 | 2013-12-16 19:04:05 +0900 | [diff] [blame] | 806 | return err; |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 807 | } |
| 808 | |
Jaegeuk Kim | 003a3e1 | 2015-04-06 19:55:34 -0700 | [diff] [blame] | 809 | static int __get_data_block(struct inode *inode, sector_t iblock, |
Chao Yu | da85985 | 2016-01-26 15:42:58 +0800 | [diff] [blame] | 810 | struct buffer_head *bh, int create, int flag, |
| 811 | pgoff_t *next_pgofs) |
Jaegeuk Kim | 003a3e1 | 2015-04-06 19:55:34 -0700 | [diff] [blame] | 812 | { |
| 813 | struct f2fs_map_blocks map; |
| 814 | int ret; |
| 815 | |
| 816 | map.m_lblk = iblock; |
| 817 | map.m_len = bh->b_size >> inode->i_blkbits; |
Chao Yu | da85985 | 2016-01-26 15:42:58 +0800 | [diff] [blame] | 818 | map.m_next_pgofs = next_pgofs; |
Jaegeuk Kim | 003a3e1 | 2015-04-06 19:55:34 -0700 | [diff] [blame] | 819 | |
Chao Yu | e2b4e2b | 2015-08-19 19:11:19 +0800 | [diff] [blame] | 820 | ret = f2fs_map_blocks(inode, &map, create, flag); |
Jaegeuk Kim | 003a3e1 | 2015-04-06 19:55:34 -0700 | [diff] [blame] | 821 | if (!ret) { |
| 822 | map_bh(bh, inode->i_sb, map.m_pblk); |
| 823 | bh->b_state = (bh->b_state & ~F2FS_MAP_FLAGS) | map.m_flags; |
| 824 | bh->b_size = map.m_len << inode->i_blkbits; |
| 825 | } |
| 826 | return ret; |
| 827 | } |
| 828 | |
Jaegeuk Kim | ccfb300 | 2014-06-13 13:02:11 +0900 | [diff] [blame] | 829 | static int get_data_block(struct inode *inode, sector_t iblock, |
Chao Yu | da85985 | 2016-01-26 15:42:58 +0800 | [diff] [blame] | 830 | struct buffer_head *bh_result, int create, int flag, |
| 831 | pgoff_t *next_pgofs) |
Jaegeuk Kim | ccfb300 | 2014-06-13 13:02:11 +0900 | [diff] [blame] | 832 | { |
Chao Yu | da85985 | 2016-01-26 15:42:58 +0800 | [diff] [blame] | 833 | return __get_data_block(inode, iblock, bh_result, create, |
| 834 | flag, next_pgofs); |
Jaegeuk Kim | ccfb300 | 2014-06-13 13:02:11 +0900 | [diff] [blame] | 835 | } |
| 836 | |
Chao Yu | e2b4e2b | 2015-08-19 19:11:19 +0800 | [diff] [blame] | 837 | static int get_data_block_dio(struct inode *inode, sector_t iblock, |
Jaegeuk Kim | ccfb300 | 2014-06-13 13:02:11 +0900 | [diff] [blame] | 838 | struct buffer_head *bh_result, int create) |
| 839 | { |
Chao Yu | e2b4e2b | 2015-08-19 19:11:19 +0800 | [diff] [blame] | 840 | return __get_data_block(inode, iblock, bh_result, create, |
Chao Yu | da85985 | 2016-01-26 15:42:58 +0800 | [diff] [blame] | 841 | F2FS_GET_BLOCK_DIO, NULL); |
Chao Yu | e2b4e2b | 2015-08-19 19:11:19 +0800 | [diff] [blame] | 842 | } |
| 843 | |
| 844 | static int get_data_block_bmap(struct inode *inode, sector_t iblock, |
| 845 | struct buffer_head *bh_result, int create) |
| 846 | { |
Yunlei He | 179448b | 2015-12-28 21:48:32 +0800 | [diff] [blame] | 847 | /* Block number less than F2FS MAX BLOCKS */ |
Chao Yu | e0afc4d | 2015-12-31 14:35:37 +0800 | [diff] [blame] | 848 | if (unlikely(iblock >= F2FS_I_SB(inode)->max_file_blocks)) |
Yunlei He | 179448b | 2015-12-28 21:48:32 +0800 | [diff] [blame] | 849 | return -EFBIG; |
| 850 | |
Chao Yu | e2b4e2b | 2015-08-19 19:11:19 +0800 | [diff] [blame] | 851 | return __get_data_block(inode, iblock, bh_result, create, |
Chao Yu | da85985 | 2016-01-26 15:42:58 +0800 | [diff] [blame] | 852 | F2FS_GET_BLOCK_BMAP, NULL); |
Jaegeuk Kim | ccfb300 | 2014-06-13 13:02:11 +0900 | [diff] [blame] | 853 | } |
| 854 | |
Jaegeuk Kim | 7f63eb7 | 2015-05-08 19:30:32 -0700 | [diff] [blame] | 855 | static inline sector_t logical_to_blk(struct inode *inode, loff_t offset) |
| 856 | { |
| 857 | return (offset >> inode->i_blkbits); |
| 858 | } |
| 859 | |
| 860 | static inline loff_t blk_to_logical(struct inode *inode, sector_t blk) |
| 861 | { |
| 862 | return (blk << inode->i_blkbits); |
| 863 | } |
| 864 | |
Jaegeuk Kim | 9ab7013 | 2014-06-08 04:30:14 +0900 | [diff] [blame] | 865 | int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
| 866 | u64 start, u64 len) |
| 867 | { |
Jaegeuk Kim | 7f63eb7 | 2015-05-08 19:30:32 -0700 | [diff] [blame] | 868 | struct buffer_head map_bh; |
| 869 | sector_t start_blk, last_blk; |
Chao Yu | da85985 | 2016-01-26 15:42:58 +0800 | [diff] [blame] | 870 | pgoff_t next_pgofs; |
Fan Li | de1475c | 2016-01-04 15:56:50 +0800 | [diff] [blame] | 871 | loff_t isize; |
Jaegeuk Kim | 7f63eb7 | 2015-05-08 19:30:32 -0700 | [diff] [blame] | 872 | u64 logical = 0, phys = 0, size = 0; |
| 873 | u32 flags = 0; |
Jaegeuk Kim | 7f63eb7 | 2015-05-08 19:30:32 -0700 | [diff] [blame] | 874 | int ret = 0; |
| 875 | |
| 876 | ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC); |
| 877 | if (ret) |
| 878 | return ret; |
| 879 | |
Jaegeuk Kim | 67f8cf3c | 2015-10-15 11:34:49 -0700 | [diff] [blame] | 880 | if (f2fs_has_inline_data(inode)) { |
| 881 | ret = f2fs_inline_data_fiemap(inode, fieinfo, start, len); |
| 882 | if (ret != -EAGAIN) |
| 883 | return ret; |
| 884 | } |
| 885 | |
Al Viro | 5955102 | 2016-01-22 15:40:57 -0500 | [diff] [blame] | 886 | inode_lock(inode); |
Fan Li | de1475c | 2016-01-04 15:56:50 +0800 | [diff] [blame] | 887 | |
| 888 | isize = i_size_read(inode); |
Fan Li | 9a950d5 | 2015-12-26 18:07:41 +0800 | [diff] [blame] | 889 | if (start >= isize) |
| 890 | goto out; |
Jaegeuk Kim | 7f63eb7 | 2015-05-08 19:30:32 -0700 | [diff] [blame] | 891 | |
Fan Li | 9a950d5 | 2015-12-26 18:07:41 +0800 | [diff] [blame] | 892 | if (start + len > isize) |
| 893 | len = isize - start; |
Jaegeuk Kim | 7f63eb7 | 2015-05-08 19:30:32 -0700 | [diff] [blame] | 894 | |
| 895 | if (logical_to_blk(inode, len) == 0) |
| 896 | len = blk_to_logical(inode, 1); |
| 897 | |
| 898 | start_blk = logical_to_blk(inode, start); |
| 899 | last_blk = logical_to_blk(inode, start + len - 1); |
Fan Li | 9a950d5 | 2015-12-26 18:07:41 +0800 | [diff] [blame] | 900 | |
Jaegeuk Kim | 7f63eb7 | 2015-05-08 19:30:32 -0700 | [diff] [blame] | 901 | next: |
| 902 | memset(&map_bh, 0, sizeof(struct buffer_head)); |
| 903 | map_bh.b_size = len; |
| 904 | |
Chao Yu | e2b4e2b | 2015-08-19 19:11:19 +0800 | [diff] [blame] | 905 | ret = get_data_block(inode, start_blk, &map_bh, 0, |
Chao Yu | da85985 | 2016-01-26 15:42:58 +0800 | [diff] [blame] | 906 | F2FS_GET_BLOCK_FIEMAP, &next_pgofs); |
Jaegeuk Kim | 7f63eb7 | 2015-05-08 19:30:32 -0700 | [diff] [blame] | 907 | if (ret) |
| 908 | goto out; |
| 909 | |
| 910 | /* HOLE */ |
| 911 | if (!buffer_mapped(&map_bh)) { |
Chao Yu | da85985 | 2016-01-26 15:42:58 +0800 | [diff] [blame] | 912 | start_blk = next_pgofs; |
Fan Li | 9a950d5 | 2015-12-26 18:07:41 +0800 | [diff] [blame] | 913 | /* Go through holes util pass the EOF */ |
Chao Yu | da85985 | 2016-01-26 15:42:58 +0800 | [diff] [blame] | 914 | if (blk_to_logical(inode, start_blk) < isize) |
Fan Li | 9a950d5 | 2015-12-26 18:07:41 +0800 | [diff] [blame] | 915 | goto prep_next; |
| 916 | /* Found a hole beyond isize means no more extents. |
| 917 | * Note that the premise is that filesystems don't |
| 918 | * punch holes beyond isize and keep size unchanged. |
Jaegeuk Kim | 7f63eb7 | 2015-05-08 19:30:32 -0700 | [diff] [blame] | 919 | */ |
Fan Li | 9a950d5 | 2015-12-26 18:07:41 +0800 | [diff] [blame] | 920 | flags |= FIEMAP_EXTENT_LAST; |
Jaegeuk Kim | 7f63eb7 | 2015-05-08 19:30:32 -0700 | [diff] [blame] | 921 | } |
Fan Li | 9a950d5 | 2015-12-26 18:07:41 +0800 | [diff] [blame] | 922 | |
Chao Yu | da5af12 | 2016-01-08 20:19:27 +0800 | [diff] [blame] | 923 | if (size) { |
| 924 | if (f2fs_encrypted_inode(inode)) |
| 925 | flags |= FIEMAP_EXTENT_DATA_ENCRYPTED; |
| 926 | |
Fan Li | 9a950d5 | 2015-12-26 18:07:41 +0800 | [diff] [blame] | 927 | ret = fiemap_fill_next_extent(fieinfo, logical, |
| 928 | phys, size, flags); |
Chao Yu | da5af12 | 2016-01-08 20:19:27 +0800 | [diff] [blame] | 929 | } |
Fan Li | 9a950d5 | 2015-12-26 18:07:41 +0800 | [diff] [blame] | 930 | |
| 931 | if (start_blk > last_blk || ret) |
| 932 | goto out; |
| 933 | |
| 934 | logical = blk_to_logical(inode, start_blk); |
| 935 | phys = blk_to_logical(inode, map_bh.b_blocknr); |
| 936 | size = map_bh.b_size; |
| 937 | flags = 0; |
| 938 | if (buffer_unwritten(&map_bh)) |
| 939 | flags = FIEMAP_EXTENT_UNWRITTEN; |
| 940 | |
| 941 | start_blk += logical_to_blk(inode, size); |
| 942 | |
| 943 | prep_next: |
Jaegeuk Kim | 7f63eb7 | 2015-05-08 19:30:32 -0700 | [diff] [blame] | 944 | cond_resched(); |
| 945 | if (fatal_signal_pending(current)) |
| 946 | ret = -EINTR; |
| 947 | else |
| 948 | goto next; |
| 949 | out: |
| 950 | if (ret == 1) |
| 951 | ret = 0; |
| 952 | |
Al Viro | 5955102 | 2016-01-22 15:40:57 -0500 | [diff] [blame] | 953 | inode_unlock(inode); |
Jaegeuk Kim | 7f63eb7 | 2015-05-08 19:30:32 -0700 | [diff] [blame] | 954 | return ret; |
Jaegeuk Kim | 9ab7013 | 2014-06-08 04:30:14 +0900 | [diff] [blame] | 955 | } |
| 956 | |
Jaegeuk Kim | f1e8866 | 2015-04-09 11:20:42 -0700 | [diff] [blame] | 957 | /* |
| 958 | * This function was originally taken from fs/mpage.c, and customized for f2fs. |
| 959 | * Major change was from block_size == page_size in f2fs by default. |
| 960 | */ |
| 961 | static int f2fs_mpage_readpages(struct address_space *mapping, |
| 962 | struct list_head *pages, struct page *page, |
| 963 | unsigned nr_pages) |
| 964 | { |
| 965 | struct bio *bio = NULL; |
| 966 | unsigned page_idx; |
| 967 | sector_t last_block_in_bio = 0; |
| 968 | struct inode *inode = mapping->host; |
| 969 | const unsigned blkbits = inode->i_blkbits; |
| 970 | const unsigned blocksize = 1 << blkbits; |
| 971 | sector_t block_in_file; |
| 972 | sector_t last_block; |
| 973 | sector_t last_block_in_file; |
| 974 | sector_t block_nr; |
| 975 | struct block_device *bdev = inode->i_sb->s_bdev; |
| 976 | struct f2fs_map_blocks map; |
| 977 | |
| 978 | map.m_pblk = 0; |
| 979 | map.m_lblk = 0; |
| 980 | map.m_len = 0; |
| 981 | map.m_flags = 0; |
Chao Yu | da85985 | 2016-01-26 15:42:58 +0800 | [diff] [blame] | 982 | map.m_next_pgofs = NULL; |
Jaegeuk Kim | f1e8866 | 2015-04-09 11:20:42 -0700 | [diff] [blame] | 983 | |
| 984 | for (page_idx = 0; nr_pages; page_idx++, nr_pages--) { |
| 985 | |
| 986 | prefetchw(&page->flags); |
| 987 | if (pages) { |
| 988 | page = list_entry(pages->prev, struct page, lru); |
| 989 | list_del(&page->lru); |
| 990 | if (add_to_page_cache_lru(page, mapping, |
| 991 | page->index, GFP_KERNEL)) |
| 992 | goto next_page; |
| 993 | } |
| 994 | |
| 995 | block_in_file = (sector_t)page->index; |
| 996 | last_block = block_in_file + nr_pages; |
| 997 | last_block_in_file = (i_size_read(inode) + blocksize - 1) >> |
| 998 | blkbits; |
| 999 | if (last_block > last_block_in_file) |
| 1000 | last_block = last_block_in_file; |
| 1001 | |
| 1002 | /* |
| 1003 | * Map blocks using the previous result first. |
| 1004 | */ |
| 1005 | if ((map.m_flags & F2FS_MAP_MAPPED) && |
| 1006 | block_in_file > map.m_lblk && |
| 1007 | block_in_file < (map.m_lblk + map.m_len)) |
| 1008 | goto got_it; |
| 1009 | |
| 1010 | /* |
| 1011 | * Then do more f2fs_map_blocks() calls until we are |
| 1012 | * done with this page. |
| 1013 | */ |
| 1014 | map.m_flags = 0; |
| 1015 | |
| 1016 | if (block_in_file < last_block) { |
| 1017 | map.m_lblk = block_in_file; |
| 1018 | map.m_len = last_block - block_in_file; |
| 1019 | |
Chao Yu | 46c9e14 | 2015-09-18 16:54:16 +0800 | [diff] [blame] | 1020 | if (f2fs_map_blocks(inode, &map, 0, |
Chao Yu | da85985 | 2016-01-26 15:42:58 +0800 | [diff] [blame] | 1021 | F2FS_GET_BLOCK_READ)) |
Jaegeuk Kim | f1e8866 | 2015-04-09 11:20:42 -0700 | [diff] [blame] | 1022 | goto set_error_page; |
| 1023 | } |
| 1024 | got_it: |
| 1025 | if ((map.m_flags & F2FS_MAP_MAPPED)) { |
| 1026 | block_nr = map.m_pblk + block_in_file - map.m_lblk; |
| 1027 | SetPageMappedToDisk(page); |
| 1028 | |
| 1029 | if (!PageUptodate(page) && !cleancache_get_page(page)) { |
| 1030 | SetPageUptodate(page); |
| 1031 | goto confused; |
| 1032 | } |
| 1033 | } else { |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 1034 | zero_user_segment(page, 0, PAGE_SIZE); |
Jaegeuk Kim | f1e8866 | 2015-04-09 11:20:42 -0700 | [diff] [blame] | 1035 | SetPageUptodate(page); |
| 1036 | unlock_page(page); |
| 1037 | goto next_page; |
| 1038 | } |
| 1039 | |
| 1040 | /* |
| 1041 | * This page will go to BIO. Do we need to send this |
| 1042 | * BIO off first? |
| 1043 | */ |
| 1044 | if (bio && (last_block_in_bio != block_nr - 1)) { |
| 1045 | submit_and_realloc: |
Jaegeuk Kim | 19a5f5e | 2016-06-04 14:25:24 -0700 | [diff] [blame] | 1046 | __submit_bio(F2FS_I_SB(inode), READ, bio, DATA); |
Jaegeuk Kim | f1e8866 | 2015-04-09 11:20:42 -0700 | [diff] [blame] | 1047 | bio = NULL; |
| 1048 | } |
| 1049 | if (bio == NULL) { |
Jaegeuk Kim | 0b81d07 | 2015-05-15 16:26:10 -0700 | [diff] [blame] | 1050 | struct fscrypt_ctx *ctx = NULL; |
Jaegeuk Kim | 4375a33 | 2015-04-23 12:04:33 -0700 | [diff] [blame] | 1051 | |
| 1052 | if (f2fs_encrypted_inode(inode) && |
| 1053 | S_ISREG(inode->i_mode)) { |
Jaegeuk Kim | 4375a33 | 2015-04-23 12:04:33 -0700 | [diff] [blame] | 1054 | |
Jaegeuk Kim | b32e448 | 2016-04-11 15:51:57 -0700 | [diff] [blame] | 1055 | ctx = fscrypt_get_ctx(inode, GFP_NOFS); |
Jaegeuk Kim | 4375a33 | 2015-04-23 12:04:33 -0700 | [diff] [blame] | 1056 | if (IS_ERR(ctx)) |
| 1057 | goto set_error_page; |
| 1058 | |
| 1059 | /* wait the page to be moved by cleaning */ |
Chao Yu | 08b39fb | 2015-10-08 13:27:34 +0800 | [diff] [blame] | 1060 | f2fs_wait_on_encrypted_page_writeback( |
| 1061 | F2FS_I_SB(inode), block_nr); |
Jaegeuk Kim | 4375a33 | 2015-04-23 12:04:33 -0700 | [diff] [blame] | 1062 | } |
| 1063 | |
Jaegeuk Kim | f1e8866 | 2015-04-09 11:20:42 -0700 | [diff] [blame] | 1064 | bio = bio_alloc(GFP_KERNEL, |
Kent Overstreet | b54ffb7 | 2015-05-19 14:31:01 +0200 | [diff] [blame] | 1065 | min_t(int, nr_pages, BIO_MAX_PAGES)); |
Jaegeuk Kim | 4375a33 | 2015-04-23 12:04:33 -0700 | [diff] [blame] | 1066 | if (!bio) { |
| 1067 | if (ctx) |
Jaegeuk Kim | 0b81d07 | 2015-05-15 16:26:10 -0700 | [diff] [blame] | 1068 | fscrypt_release_ctx(ctx); |
Jaegeuk Kim | f1e8866 | 2015-04-09 11:20:42 -0700 | [diff] [blame] | 1069 | goto set_error_page; |
Jaegeuk Kim | 4375a33 | 2015-04-23 12:04:33 -0700 | [diff] [blame] | 1070 | } |
Jaegeuk Kim | f1e8866 | 2015-04-09 11:20:42 -0700 | [diff] [blame] | 1071 | bio->bi_bdev = bdev; |
| 1072 | bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(block_nr); |
Chao Yu | 1237702 | 2015-05-25 18:03:38 +0800 | [diff] [blame] | 1073 | bio->bi_end_io = f2fs_read_end_io; |
Jaegeuk Kim | 4375a33 | 2015-04-23 12:04:33 -0700 | [diff] [blame] | 1074 | bio->bi_private = ctx; |
Jaegeuk Kim | f1e8866 | 2015-04-09 11:20:42 -0700 | [diff] [blame] | 1075 | } |
| 1076 | |
| 1077 | if (bio_add_page(bio, page, blocksize, 0) < blocksize) |
| 1078 | goto submit_and_realloc; |
| 1079 | |
| 1080 | last_block_in_bio = block_nr; |
| 1081 | goto next_page; |
| 1082 | set_error_page: |
| 1083 | SetPageError(page); |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 1084 | zero_user_segment(page, 0, PAGE_SIZE); |
Jaegeuk Kim | f1e8866 | 2015-04-09 11:20:42 -0700 | [diff] [blame] | 1085 | unlock_page(page); |
| 1086 | goto next_page; |
| 1087 | confused: |
| 1088 | if (bio) { |
Jaegeuk Kim | 19a5f5e | 2016-06-04 14:25:24 -0700 | [diff] [blame] | 1089 | __submit_bio(F2FS_I_SB(inode), READ, bio, DATA); |
Jaegeuk Kim | f1e8866 | 2015-04-09 11:20:42 -0700 | [diff] [blame] | 1090 | bio = NULL; |
| 1091 | } |
| 1092 | unlock_page(page); |
| 1093 | next_page: |
| 1094 | if (pages) |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 1095 | put_page(page); |
Jaegeuk Kim | f1e8866 | 2015-04-09 11:20:42 -0700 | [diff] [blame] | 1096 | } |
| 1097 | BUG_ON(pages && !list_empty(pages)); |
| 1098 | if (bio) |
Jaegeuk Kim | 19a5f5e | 2016-06-04 14:25:24 -0700 | [diff] [blame] | 1099 | __submit_bio(F2FS_I_SB(inode), READ, bio, DATA); |
Jaegeuk Kim | f1e8866 | 2015-04-09 11:20:42 -0700 | [diff] [blame] | 1100 | return 0; |
| 1101 | } |
| 1102 | |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 1103 | static int f2fs_read_data_page(struct file *file, struct page *page) |
| 1104 | { |
Huajun Li | 9ffe0fb | 2013-11-10 23:13:20 +0800 | [diff] [blame] | 1105 | struct inode *inode = page->mapping->host; |
Jaegeuk Kim | b3d208f | 2014-10-23 19:48:09 -0700 | [diff] [blame] | 1106 | int ret = -EAGAIN; |
Huajun Li | 9ffe0fb | 2013-11-10 23:13:20 +0800 | [diff] [blame] | 1107 | |
Chao Yu | c20e89c | 2014-05-06 16:53:08 +0800 | [diff] [blame] | 1108 | trace_f2fs_readpage(page, DATA); |
| 1109 | |
arter97 | e1c4204 | 2014-08-06 23:22:50 +0900 | [diff] [blame] | 1110 | /* If the file has inline data, try to read it directly */ |
Huajun Li | 9ffe0fb | 2013-11-10 23:13:20 +0800 | [diff] [blame] | 1111 | if (f2fs_has_inline_data(inode)) |
| 1112 | ret = f2fs_read_inline_data(inode, page); |
Jaegeuk Kim | b3d208f | 2014-10-23 19:48:09 -0700 | [diff] [blame] | 1113 | if (ret == -EAGAIN) |
Jaegeuk Kim | f1e8866 | 2015-04-09 11:20:42 -0700 | [diff] [blame] | 1114 | ret = f2fs_mpage_readpages(page->mapping, NULL, page, 1); |
Huajun Li | 9ffe0fb | 2013-11-10 23:13:20 +0800 | [diff] [blame] | 1115 | return ret; |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 1116 | } |
| 1117 | |
| 1118 | static int f2fs_read_data_pages(struct file *file, |
| 1119 | struct address_space *mapping, |
| 1120 | struct list_head *pages, unsigned nr_pages) |
| 1121 | { |
Huajun Li | 9ffe0fb | 2013-11-10 23:13:20 +0800 | [diff] [blame] | 1122 | struct inode *inode = file->f_mapping->host; |
Chao Yu | b8c2940 | 2015-10-12 17:02:26 +0800 | [diff] [blame] | 1123 | struct page *page = list_entry(pages->prev, struct page, lru); |
| 1124 | |
| 1125 | trace_f2fs_readpages(inode, page, nr_pages); |
Huajun Li | 9ffe0fb | 2013-11-10 23:13:20 +0800 | [diff] [blame] | 1126 | |
| 1127 | /* If the file has inline data, skip readpages */ |
| 1128 | if (f2fs_has_inline_data(inode)) |
| 1129 | return 0; |
| 1130 | |
Jaegeuk Kim | f1e8866 | 2015-04-09 11:20:42 -0700 | [diff] [blame] | 1131 | return f2fs_mpage_readpages(mapping, pages, NULL, nr_pages); |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 1132 | } |
| 1133 | |
Jaegeuk Kim | 05ca363 | 2015-04-23 14:38:15 -0700 | [diff] [blame] | 1134 | int do_write_data_page(struct f2fs_io_info *fio) |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 1135 | { |
Jaegeuk Kim | 05ca363 | 2015-04-23 14:38:15 -0700 | [diff] [blame] | 1136 | struct page *page = fio->page; |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 1137 | struct inode *inode = page->mapping->host; |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 1138 | struct dnode_of_data dn; |
| 1139 | int err = 0; |
| 1140 | |
| 1141 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
Jaegeuk Kim | 266e97a | 2013-02-26 13:10:46 +0900 | [diff] [blame] | 1142 | err = get_dnode_of_data(&dn, page->index, LOOKUP_NODE); |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 1143 | if (err) |
| 1144 | return err; |
| 1145 | |
Chao Yu | 28bc106 | 2016-02-06 14:40:34 +0800 | [diff] [blame] | 1146 | fio->old_blkaddr = dn.data_blkaddr; |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 1147 | |
| 1148 | /* This page is already truncated */ |
Chao Yu | 7a9d754 | 2016-02-22 18:36:38 +0800 | [diff] [blame] | 1149 | if (fio->old_blkaddr == NULL_ADDR) { |
Jaegeuk Kim | 2bca1e2 | 2015-02-25 19:25:01 -0800 | [diff] [blame] | 1150 | ClearPageUptodate(page); |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 1151 | goto out_writepage; |
Jaegeuk Kim | 2bca1e2 | 2015-02-25 19:25:01 -0800 | [diff] [blame] | 1152 | } |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 1153 | |
Jaegeuk Kim | 4375a33 | 2015-04-23 12:04:33 -0700 | [diff] [blame] | 1154 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) { |
Jaegeuk Kim | b32e448 | 2016-04-11 15:51:57 -0700 | [diff] [blame] | 1155 | gfp_t gfp_flags = GFP_NOFS; |
Chao Yu | 08b39fb | 2015-10-08 13:27:34 +0800 | [diff] [blame] | 1156 | |
| 1157 | /* wait for GCed encrypted page writeback */ |
| 1158 | f2fs_wait_on_encrypted_page_writeback(F2FS_I_SB(inode), |
Chao Yu | 7a9d754 | 2016-02-22 18:36:38 +0800 | [diff] [blame] | 1159 | fio->old_blkaddr); |
Jaegeuk Kim | b32e448 | 2016-04-11 15:51:57 -0700 | [diff] [blame] | 1160 | retry_encrypt: |
| 1161 | fio->encrypted_page = fscrypt_encrypt_page(inode, fio->page, |
| 1162 | gfp_flags); |
Jaegeuk Kim | 4375a33 | 2015-04-23 12:04:33 -0700 | [diff] [blame] | 1163 | if (IS_ERR(fio->encrypted_page)) { |
| 1164 | err = PTR_ERR(fio->encrypted_page); |
Jaegeuk Kim | b32e448 | 2016-04-11 15:51:57 -0700 | [diff] [blame] | 1165 | if (err == -ENOMEM) { |
| 1166 | /* flush pending ios and wait for a while */ |
| 1167 | f2fs_flush_merged_bios(F2FS_I_SB(inode)); |
| 1168 | congestion_wait(BLK_RW_ASYNC, HZ/50); |
| 1169 | gfp_flags |= __GFP_NOFAIL; |
| 1170 | err = 0; |
| 1171 | goto retry_encrypt; |
| 1172 | } |
Jaegeuk Kim | 4375a33 | 2015-04-23 12:04:33 -0700 | [diff] [blame] | 1173 | goto out_writepage; |
| 1174 | } |
| 1175 | } |
| 1176 | |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 1177 | set_page_writeback(page); |
| 1178 | |
| 1179 | /* |
| 1180 | * If current allocation needs SSR, |
| 1181 | * it had better in-place writes for updated data. |
| 1182 | */ |
Chao Yu | 7a9d754 | 2016-02-22 18:36:38 +0800 | [diff] [blame] | 1183 | if (unlikely(fio->old_blkaddr != NEW_ADDR && |
Haicheng Li | b25958b | 2013-06-13 16:59:29 +0800 | [diff] [blame] | 1184 | !is_cold_data(page) && |
Chao Yu | 2da3e027 | 2015-10-28 17:56:14 +0800 | [diff] [blame] | 1185 | !IS_ATOMIC_WRITTEN_PAGE(page) && |
Haicheng Li | b25958b | 2013-06-13 16:59:29 +0800 | [diff] [blame] | 1186 | need_inplace_update(inode))) { |
Jaegeuk Kim | 05ca363 | 2015-04-23 14:38:15 -0700 | [diff] [blame] | 1187 | rewrite_data_page(fio); |
Jaegeuk Kim | 9194232 | 2016-05-20 10:13:22 -0700 | [diff] [blame] | 1188 | set_inode_flag(inode, FI_UPDATE_WRITE); |
Jaegeuk Kim | 8ce67cb | 2015-03-17 17:58:08 -0700 | [diff] [blame] | 1189 | trace_f2fs_do_write_data_page(page, IPU); |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 1190 | } else { |
Jaegeuk Kim | 05ca363 | 2015-04-23 14:38:15 -0700 | [diff] [blame] | 1191 | write_data_page(&dn, fio); |
Jaegeuk Kim | 8ce67cb | 2015-03-17 17:58:08 -0700 | [diff] [blame] | 1192 | trace_f2fs_do_write_data_page(page, OPU); |
Jaegeuk Kim | 9194232 | 2016-05-20 10:13:22 -0700 | [diff] [blame] | 1193 | set_inode_flag(inode, FI_APPEND_WRITE); |
Jaegeuk Kim | 3c6c2be | 2015-03-17 17:16:35 -0700 | [diff] [blame] | 1194 | if (page->index == 0) |
Jaegeuk Kim | 9194232 | 2016-05-20 10:13:22 -0700 | [diff] [blame] | 1195 | set_inode_flag(inode, FI_FIRST_BLOCK_WRITTEN); |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 1196 | } |
| 1197 | out_writepage: |
| 1198 | f2fs_put_dnode(&dn); |
| 1199 | return err; |
| 1200 | } |
| 1201 | |
| 1202 | static int f2fs_write_data_page(struct page *page, |
| 1203 | struct writeback_control *wbc) |
| 1204 | { |
| 1205 | struct inode *inode = page->mapping->host; |
Jaegeuk Kim | 4081363 | 2014-09-02 15:31:18 -0700 | [diff] [blame] | 1206 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 1207 | loff_t i_size = i_size_read(inode); |
| 1208 | const pgoff_t end_index = ((unsigned long long) i_size) |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 1209 | >> PAGE_SHIFT; |
Jaegeuk Kim | 26de9b1 | 2016-05-20 20:42:37 -0700 | [diff] [blame] | 1210 | loff_t psize = (page->index + 1) << PAGE_SHIFT; |
Huajun Li | 9ffe0fb | 2013-11-10 23:13:20 +0800 | [diff] [blame] | 1211 | unsigned offset = 0; |
Jaegeuk Kim | 3993683 | 2012-11-22 16:21:29 +0900 | [diff] [blame] | 1212 | bool need_balance_fs = false; |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 1213 | int err = 0; |
Jaegeuk Kim | 458e619 | 2013-12-11 13:54:01 +0900 | [diff] [blame] | 1214 | struct f2fs_io_info fio = { |
Jaegeuk Kim | 05ca363 | 2015-04-23 14:38:15 -0700 | [diff] [blame] | 1215 | .sbi = sbi, |
Jaegeuk Kim | 458e619 | 2013-12-11 13:54:01 +0900 | [diff] [blame] | 1216 | .type = DATA, |
Chris Fries | 6c311ec | 2014-01-17 14:44:39 -0600 | [diff] [blame] | 1217 | .rw = (wbc->sync_mode == WB_SYNC_ALL) ? WRITE_SYNC : WRITE, |
Jaegeuk Kim | 05ca363 | 2015-04-23 14:38:15 -0700 | [diff] [blame] | 1218 | .page = page, |
Jaegeuk Kim | 4375a33 | 2015-04-23 12:04:33 -0700 | [diff] [blame] | 1219 | .encrypted_page = NULL, |
Jaegeuk Kim | 458e619 | 2013-12-11 13:54:01 +0900 | [diff] [blame] | 1220 | }; |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 1221 | |
Chao Yu | ecda0de | 2014-05-06 16:48:26 +0800 | [diff] [blame] | 1222 | trace_f2fs_writepage(page, DATA); |
| 1223 | |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 1224 | if (page->index < end_index) |
Jaegeuk Kim | 3993683 | 2012-11-22 16:21:29 +0900 | [diff] [blame] | 1225 | goto write; |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 1226 | |
| 1227 | /* |
| 1228 | * If the offset is out-of-range of file size, |
| 1229 | * this page does not have to be written to disk. |
| 1230 | */ |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 1231 | offset = i_size & (PAGE_SIZE - 1); |
Jaegeuk Kim | 76f6026 | 2014-04-15 16:04:15 +0900 | [diff] [blame] | 1232 | if ((page->index >= end_index + 1) || !offset) |
Jaegeuk Kim | 3993683 | 2012-11-22 16:21:29 +0900 | [diff] [blame] | 1233 | goto out; |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 1234 | |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 1235 | zero_user_segment(page, offset, PAGE_SIZE); |
Jaegeuk Kim | 3993683 | 2012-11-22 16:21:29 +0900 | [diff] [blame] | 1236 | write: |
Chao Yu | caf0047 | 2015-01-28 17:48:42 +0800 | [diff] [blame] | 1237 | if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 1238 | goto redirty_out; |
Jaegeuk Kim | 1e84371 | 2014-12-09 06:08:59 -0800 | [diff] [blame] | 1239 | if (f2fs_is_drop_cache(inode)) |
| 1240 | goto out; |
Jaegeuk Kim | e6e5f56 | 2016-04-14 16:48:52 -0700 | [diff] [blame] | 1241 | /* we should not write 0'th page having journal header */ |
| 1242 | if (f2fs_is_volatile_file(inode) && (!page->index || |
| 1243 | (!wbc->for_reclaim && |
| 1244 | available_free_memory(sbi, BASE_CHECK)))) |
Jaegeuk Kim | 1e84371 | 2014-12-09 06:08:59 -0800 | [diff] [blame] | 1245 | goto redirty_out; |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 1246 | |
Jaegeuk Kim | cf779ca | 2014-08-11 18:37:46 -0700 | [diff] [blame] | 1247 | /* we should bypass data pages to proceed the kworkder jobs */ |
| 1248 | if (unlikely(f2fs_cp_error(sbi))) { |
Jaegeuk Kim | 7f31997 | 2016-06-03 12:28:26 -0700 | [diff] [blame] | 1249 | mapping_set_error(page->mapping, -EIO); |
Jaegeuk Kim | a7ffdbe | 2014-09-12 15:53:45 -0700 | [diff] [blame] | 1250 | goto out; |
Jaegeuk Kim | cf779ca | 2014-08-11 18:37:46 -0700 | [diff] [blame] | 1251 | } |
| 1252 | |
Jaegeuk Kim | b230e6c | 2016-05-29 21:18:23 -0700 | [diff] [blame] | 1253 | /* Dentry blocks are controlled by checkpoint */ |
| 1254 | if (S_ISDIR(inode->i_mode)) { |
| 1255 | err = do_write_data_page(&fio); |
| 1256 | goto done; |
| 1257 | } |
| 1258 | |
Jaegeuk Kim | 8618b88 | 2014-02-17 19:29:27 +0900 | [diff] [blame] | 1259 | if (!wbc->for_reclaim) |
| 1260 | need_balance_fs = true; |
| 1261 | else if (has_not_enough_free_secs(sbi, 0)) |
Jaegeuk Kim | 3993683 | 2012-11-22 16:21:29 +0900 | [diff] [blame] | 1262 | goto redirty_out; |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 1263 | |
Jaegeuk Kim | b3d208f | 2014-10-23 19:48:09 -0700 | [diff] [blame] | 1264 | err = -EAGAIN; |
Jaegeuk Kim | 8618b88 | 2014-02-17 19:29:27 +0900 | [diff] [blame] | 1265 | f2fs_lock_op(sbi); |
Jaegeuk Kim | b3d208f | 2014-10-23 19:48:09 -0700 | [diff] [blame] | 1266 | if (f2fs_has_inline_data(inode)) |
| 1267 | err = f2fs_write_inline_data(inode, page); |
| 1268 | if (err == -EAGAIN) |
Jaegeuk Kim | 05ca363 | 2015-04-23 14:38:15 -0700 | [diff] [blame] | 1269 | err = do_write_data_page(&fio); |
Jaegeuk Kim | 26de9b1 | 2016-05-20 20:42:37 -0700 | [diff] [blame] | 1270 | if (F2FS_I(inode)->last_disk_size < psize) |
| 1271 | F2FS_I(inode)->last_disk_size = psize; |
Jaegeuk Kim | 8618b88 | 2014-02-17 19:29:27 +0900 | [diff] [blame] | 1272 | f2fs_unlock_op(sbi); |
| 1273 | done: |
| 1274 | if (err && err != -ENOENT) |
| 1275 | goto redirty_out; |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 1276 | |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 1277 | clear_cold_data(page); |
Jaegeuk Kim | 3993683 | 2012-11-22 16:21:29 +0900 | [diff] [blame] | 1278 | out: |
Jaegeuk Kim | a7ffdbe | 2014-09-12 15:53:45 -0700 | [diff] [blame] | 1279 | inode_dec_dirty_pages(inode); |
Jaegeuk Kim | 2bca1e2 | 2015-02-25 19:25:01 -0800 | [diff] [blame] | 1280 | if (err) |
| 1281 | ClearPageUptodate(page); |
Chao Yu | 0c3a579 | 2016-01-18 18:28:11 +0800 | [diff] [blame] | 1282 | |
| 1283 | if (wbc->for_reclaim) { |
| 1284 | f2fs_submit_merged_bio_cond(sbi, NULL, page, 0, DATA, WRITE); |
Chao Yu | c227f91 | 2015-12-16 13:09:20 +0800 | [diff] [blame] | 1285 | remove_dirty_inode(inode); |
Chao Yu | eb7e813 | 2015-11-10 18:45:07 +0800 | [diff] [blame] | 1286 | } |
Chao Yu | 0c3a579 | 2016-01-18 18:28:11 +0800 | [diff] [blame] | 1287 | |
| 1288 | unlock_page(page); |
| 1289 | f2fs_balance_fs(sbi, need_balance_fs); |
| 1290 | |
| 1291 | if (unlikely(f2fs_cp_error(sbi))) |
| 1292 | f2fs_submit_merged_bio(sbi, DATA, WRITE); |
| 1293 | |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 1294 | return 0; |
| 1295 | |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 1296 | redirty_out: |
Jaegeuk Kim | 76f6026 | 2014-04-15 16:04:15 +0900 | [diff] [blame] | 1297 | redirty_page_for_writepage(wbc, page); |
Jaegeuk Kim | b230e6c | 2016-05-29 21:18:23 -0700 | [diff] [blame] | 1298 | unlock_page(page); |
| 1299 | return err; |
Namjae Jeon | fa9150a | 2013-01-15 16:45:24 +0900 | [diff] [blame] | 1300 | } |
| 1301 | |
Chao Yu | 8f46dca | 2015-07-14 18:56:10 +0800 | [diff] [blame] | 1302 | /* |
| 1303 | * This function was copied from write_cche_pages from mm/page-writeback.c. |
| 1304 | * The major change is making write step of cold data page separately from |
| 1305 | * warm/hot data page. |
| 1306 | */ |
| 1307 | static int f2fs_write_cache_pages(struct address_space *mapping, |
Jaegeuk Kim | b230e6c | 2016-05-29 21:18:23 -0700 | [diff] [blame] | 1308 | struct writeback_control *wbc) |
Chao Yu | 8f46dca | 2015-07-14 18:56:10 +0800 | [diff] [blame] | 1309 | { |
| 1310 | int ret = 0; |
| 1311 | int done = 0; |
| 1312 | struct pagevec pvec; |
| 1313 | int nr_pages; |
| 1314 | pgoff_t uninitialized_var(writeback_index); |
| 1315 | pgoff_t index; |
| 1316 | pgoff_t end; /* Inclusive */ |
| 1317 | pgoff_t done_index; |
| 1318 | int cycled; |
| 1319 | int range_whole = 0; |
| 1320 | int tag; |
Chao Yu | 8f46dca | 2015-07-14 18:56:10 +0800 | [diff] [blame] | 1321 | |
| 1322 | pagevec_init(&pvec, 0); |
Jaegeuk Kim | 46ae957 | 2016-05-25 20:57:16 -0700 | [diff] [blame] | 1323 | |
Chao Yu | 8f46dca | 2015-07-14 18:56:10 +0800 | [diff] [blame] | 1324 | if (wbc->range_cyclic) { |
| 1325 | writeback_index = mapping->writeback_index; /* prev offset */ |
| 1326 | index = writeback_index; |
| 1327 | if (index == 0) |
| 1328 | cycled = 1; |
| 1329 | else |
| 1330 | cycled = 0; |
| 1331 | end = -1; |
| 1332 | } else { |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 1333 | index = wbc->range_start >> PAGE_SHIFT; |
| 1334 | end = wbc->range_end >> PAGE_SHIFT; |
Chao Yu | 8f46dca | 2015-07-14 18:56:10 +0800 | [diff] [blame] | 1335 | if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX) |
| 1336 | range_whole = 1; |
| 1337 | cycled = 1; /* ignore range_cyclic tests */ |
| 1338 | } |
| 1339 | if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) |
| 1340 | tag = PAGECACHE_TAG_TOWRITE; |
| 1341 | else |
| 1342 | tag = PAGECACHE_TAG_DIRTY; |
| 1343 | retry: |
| 1344 | if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) |
| 1345 | tag_pages_for_writeback(mapping, index, end); |
| 1346 | done_index = index; |
| 1347 | while (!done && (index <= end)) { |
| 1348 | int i; |
| 1349 | |
| 1350 | nr_pages = pagevec_lookup_tag(&pvec, mapping, &index, tag, |
| 1351 | min(end - index, (pgoff_t)PAGEVEC_SIZE - 1) + 1); |
| 1352 | if (nr_pages == 0) |
| 1353 | break; |
| 1354 | |
| 1355 | for (i = 0; i < nr_pages; i++) { |
| 1356 | struct page *page = pvec.pages[i]; |
| 1357 | |
| 1358 | if (page->index > end) { |
| 1359 | done = 1; |
| 1360 | break; |
| 1361 | } |
| 1362 | |
| 1363 | done_index = page->index; |
| 1364 | |
| 1365 | lock_page(page); |
| 1366 | |
| 1367 | if (unlikely(page->mapping != mapping)) { |
| 1368 | continue_unlock: |
| 1369 | unlock_page(page); |
| 1370 | continue; |
| 1371 | } |
| 1372 | |
| 1373 | if (!PageDirty(page)) { |
| 1374 | /* someone wrote it for us */ |
| 1375 | goto continue_unlock; |
| 1376 | } |
| 1377 | |
Chao Yu | 8f46dca | 2015-07-14 18:56:10 +0800 | [diff] [blame] | 1378 | if (PageWriteback(page)) { |
| 1379 | if (wbc->sync_mode != WB_SYNC_NONE) |
Jaegeuk Kim | fec1d65 | 2016-01-20 23:43:51 +0800 | [diff] [blame] | 1380 | f2fs_wait_on_page_writeback(page, |
| 1381 | DATA, true); |
Chao Yu | 8f46dca | 2015-07-14 18:56:10 +0800 | [diff] [blame] | 1382 | else |
| 1383 | goto continue_unlock; |
| 1384 | } |
| 1385 | |
| 1386 | BUG_ON(PageWriteback(page)); |
| 1387 | if (!clear_page_dirty_for_io(page)) |
| 1388 | goto continue_unlock; |
| 1389 | |
Jaegeuk Kim | b230e6c | 2016-05-29 21:18:23 -0700 | [diff] [blame] | 1390 | ret = mapping->a_ops->writepage(page, wbc); |
Chao Yu | 8f46dca | 2015-07-14 18:56:10 +0800 | [diff] [blame] | 1391 | if (unlikely(ret)) { |
Jaegeuk Kim | b230e6c | 2016-05-29 21:18:23 -0700 | [diff] [blame] | 1392 | done_index = page->index + 1; |
| 1393 | done = 1; |
| 1394 | break; |
Chao Yu | 8f46dca | 2015-07-14 18:56:10 +0800 | [diff] [blame] | 1395 | } |
| 1396 | |
| 1397 | if (--wbc->nr_to_write <= 0 && |
| 1398 | wbc->sync_mode == WB_SYNC_NONE) { |
| 1399 | done = 1; |
| 1400 | break; |
| 1401 | } |
| 1402 | } |
| 1403 | pagevec_release(&pvec); |
| 1404 | cond_resched(); |
| 1405 | } |
| 1406 | |
Chao Yu | 8f46dca | 2015-07-14 18:56:10 +0800 | [diff] [blame] | 1407 | if (!cycled && !done) { |
| 1408 | cycled = 1; |
| 1409 | index = 0; |
| 1410 | end = writeback_index - 1; |
| 1411 | goto retry; |
| 1412 | } |
| 1413 | if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0)) |
| 1414 | mapping->writeback_index = done_index; |
| 1415 | |
| 1416 | return ret; |
| 1417 | } |
| 1418 | |
Jaegeuk Kim | 25ca923 | 2012-11-28 16:12:41 +0900 | [diff] [blame] | 1419 | static int f2fs_write_data_pages(struct address_space *mapping, |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 1420 | struct writeback_control *wbc) |
| 1421 | { |
| 1422 | struct inode *inode = mapping->host; |
Jaegeuk Kim | 4081363 | 2014-09-02 15:31:18 -0700 | [diff] [blame] | 1423 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 1424 | int ret; |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 1425 | |
P J P | cfb185a | 2013-04-03 11:38:00 +0900 | [diff] [blame] | 1426 | /* deal with chardevs and other special file */ |
| 1427 | if (!mapping->a_ops->writepage) |
| 1428 | return 0; |
| 1429 | |
Chao Yu | 6a29054 | 2015-07-17 18:02:39 +0800 | [diff] [blame] | 1430 | /* skip writing if there is no dirty page in this inode */ |
| 1431 | if (!get_dirty_pages(inode) && wbc->sync_mode == WB_SYNC_NONE) |
| 1432 | return 0; |
| 1433 | |
Jaegeuk Kim | a125702 | 2015-10-08 10:40:07 -0700 | [diff] [blame] | 1434 | if (S_ISDIR(inode->i_mode) && wbc->sync_mode == WB_SYNC_NONE && |
| 1435 | get_dirty_pages(inode) < nr_pages_to_skip(sbi, DATA) && |
| 1436 | available_free_memory(sbi, DIRTY_DENTS)) |
| 1437 | goto skip_write; |
| 1438 | |
Chao Yu | d323d00 | 2015-10-27 09:53:45 +0800 | [diff] [blame] | 1439 | /* skip writing during file defragment */ |
Jaegeuk Kim | 9194232 | 2016-05-20 10:13:22 -0700 | [diff] [blame] | 1440 | if (is_inode_flag_set(inode, FI_DO_DEFRAG)) |
Chao Yu | d323d00 | 2015-10-27 09:53:45 +0800 | [diff] [blame] | 1441 | goto skip_write; |
| 1442 | |
Jaegeuk Kim | d5669f7 | 2015-02-27 13:37:39 -0800 | [diff] [blame] | 1443 | /* during POR, we don't need to trigger writepage at all. */ |
| 1444 | if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) |
| 1445 | goto skip_write; |
| 1446 | |
Yunlei He | d31c7c3 | 2016-02-04 16:14:00 +0800 | [diff] [blame] | 1447 | trace_f2fs_writepages(mapping->host, wbc, DATA); |
| 1448 | |
Jaegeuk Kim | b230e6c | 2016-05-29 21:18:23 -0700 | [diff] [blame] | 1449 | ret = f2fs_write_cache_pages(mapping, wbc); |
Jaegeuk Kim | 28ea616 | 2016-05-25 17:17:56 -0700 | [diff] [blame] | 1450 | /* |
| 1451 | * if some pages were truncated, we cannot guarantee its mapping->host |
| 1452 | * to detect pending bios. |
| 1453 | */ |
| 1454 | f2fs_submit_merged_bio(sbi, DATA, WRITE); |
Jaegeuk Kim | 458e619 | 2013-12-11 13:54:01 +0900 | [diff] [blame] | 1455 | |
Chao Yu | c227f91 | 2015-12-16 13:09:20 +0800 | [diff] [blame] | 1456 | remove_dirty_inode(inode); |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 1457 | return ret; |
Jaegeuk Kim | d3baf95 | 2014-03-18 13:43:05 +0900 | [diff] [blame] | 1458 | |
| 1459 | skip_write: |
Jaegeuk Kim | a7ffdbe | 2014-09-12 15:53:45 -0700 | [diff] [blame] | 1460 | wbc->pages_skipped += get_dirty_pages(inode); |
Yunlei He | d31c7c3 | 2016-02-04 16:14:00 +0800 | [diff] [blame] | 1461 | trace_f2fs_writepages(mapping->host, wbc, DATA); |
Jaegeuk Kim | d3baf95 | 2014-03-18 13:43:05 +0900 | [diff] [blame] | 1462 | return 0; |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 1463 | } |
| 1464 | |
Chao Yu | 3aab8f8 | 2014-07-02 13:25:04 +0800 | [diff] [blame] | 1465 | static void f2fs_write_failed(struct address_space *mapping, loff_t to) |
| 1466 | { |
| 1467 | struct inode *inode = mapping->host; |
Jaegeuk Kim | 819d915 | 2015-12-28 13:48:11 -0800 | [diff] [blame] | 1468 | loff_t i_size = i_size_read(inode); |
Chao Yu | 3aab8f8 | 2014-07-02 13:25:04 +0800 | [diff] [blame] | 1469 | |
Jaegeuk Kim | 819d915 | 2015-12-28 13:48:11 -0800 | [diff] [blame] | 1470 | if (to > i_size) { |
| 1471 | truncate_pagecache(inode, i_size); |
| 1472 | truncate_blocks(inode, i_size, true); |
Chao Yu | 3aab8f8 | 2014-07-02 13:25:04 +0800 | [diff] [blame] | 1473 | } |
| 1474 | } |
| 1475 | |
Jaegeuk Kim | 2aadac0 | 2015-12-23 11:55:18 -0800 | [diff] [blame] | 1476 | static int prepare_write_begin(struct f2fs_sb_info *sbi, |
| 1477 | struct page *page, loff_t pos, unsigned len, |
| 1478 | block_t *blk_addr, bool *node_changed) |
| 1479 | { |
| 1480 | struct inode *inode = page->mapping->host; |
| 1481 | pgoff_t index = page->index; |
| 1482 | struct dnode_of_data dn; |
| 1483 | struct page *ipage; |
Jaegeuk Kim | b4d07a3 | 2015-12-23 13:48:58 -0800 | [diff] [blame] | 1484 | bool locked = false; |
| 1485 | struct extent_info ei; |
Jaegeuk Kim | 2aadac0 | 2015-12-23 11:55:18 -0800 | [diff] [blame] | 1486 | int err = 0; |
| 1487 | |
Jaegeuk Kim | 24b8491 | 2016-02-03 13:49:44 -0800 | [diff] [blame] | 1488 | /* |
| 1489 | * we already allocated all the blocks, so we don't need to get |
| 1490 | * the block addresses when there is no need to fill the page. |
| 1491 | */ |
| 1492 | if (!f2fs_has_inline_data(inode) && !f2fs_encrypted_inode(inode) && |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 1493 | len == PAGE_SIZE) |
Jaegeuk Kim | 24b8491 | 2016-02-03 13:49:44 -0800 | [diff] [blame] | 1494 | return 0; |
| 1495 | |
Jaegeuk Kim | b4d07a3 | 2015-12-23 13:48:58 -0800 | [diff] [blame] | 1496 | if (f2fs_has_inline_data(inode) || |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 1497 | (pos & PAGE_MASK) >= i_size_read(inode)) { |
Jaegeuk Kim | b4d07a3 | 2015-12-23 13:48:58 -0800 | [diff] [blame] | 1498 | f2fs_lock_op(sbi); |
| 1499 | locked = true; |
| 1500 | } |
| 1501 | restart: |
Jaegeuk Kim | 2aadac0 | 2015-12-23 11:55:18 -0800 | [diff] [blame] | 1502 | /* check inline_data */ |
| 1503 | ipage = get_node_page(sbi, inode->i_ino); |
| 1504 | if (IS_ERR(ipage)) { |
| 1505 | err = PTR_ERR(ipage); |
| 1506 | goto unlock_out; |
| 1507 | } |
| 1508 | |
| 1509 | set_new_dnode(&dn, inode, ipage, ipage, 0); |
| 1510 | |
| 1511 | if (f2fs_has_inline_data(inode)) { |
| 1512 | if (pos + len <= MAX_INLINE_DATA) { |
| 1513 | read_inline_data(page, ipage); |
Jaegeuk Kim | 9194232 | 2016-05-20 10:13:22 -0700 | [diff] [blame] | 1514 | set_inode_flag(inode, FI_DATA_EXIST); |
Chao Yu | ab47036 | 2016-05-11 19:48:44 +0800 | [diff] [blame] | 1515 | if (inode->i_nlink) |
| 1516 | set_inline_node(ipage); |
Jaegeuk Kim | 2aadac0 | 2015-12-23 11:55:18 -0800 | [diff] [blame] | 1517 | } else { |
| 1518 | err = f2fs_convert_inline_page(&dn, page); |
| 1519 | if (err) |
Jaegeuk Kim | b4d07a3 | 2015-12-23 13:48:58 -0800 | [diff] [blame] | 1520 | goto out; |
| 1521 | if (dn.data_blkaddr == NULL_ADDR) |
| 1522 | err = f2fs_get_block(&dn, index); |
| 1523 | } |
| 1524 | } else if (locked) { |
| 1525 | err = f2fs_get_block(&dn, index); |
| 1526 | } else { |
| 1527 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { |
| 1528 | dn.data_blkaddr = ei.blk + index - ei.fofs; |
| 1529 | } else { |
Jaegeuk Kim | b4d07a3 | 2015-12-23 13:48:58 -0800 | [diff] [blame] | 1530 | /* hole case */ |
| 1531 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); |
Jaegeuk Kim | 4da7bf5 | 2016-04-06 11:27:03 -0700 | [diff] [blame] | 1532 | if (err || dn.data_blkaddr == NULL_ADDR) { |
Jaegeuk Kim | b4d07a3 | 2015-12-23 13:48:58 -0800 | [diff] [blame] | 1533 | f2fs_put_dnode(&dn); |
| 1534 | f2fs_lock_op(sbi); |
| 1535 | locked = true; |
| 1536 | goto restart; |
| 1537 | } |
Jaegeuk Kim | 2aadac0 | 2015-12-23 11:55:18 -0800 | [diff] [blame] | 1538 | } |
| 1539 | } |
Jaegeuk Kim | b4d07a3 | 2015-12-23 13:48:58 -0800 | [diff] [blame] | 1540 | |
Jaegeuk Kim | 2aadac0 | 2015-12-23 11:55:18 -0800 | [diff] [blame] | 1541 | /* convert_inline_page can make node_changed */ |
| 1542 | *blk_addr = dn.data_blkaddr; |
| 1543 | *node_changed = dn.node_changed; |
Jaegeuk Kim | b4d07a3 | 2015-12-23 13:48:58 -0800 | [diff] [blame] | 1544 | out: |
Jaegeuk Kim | 2aadac0 | 2015-12-23 11:55:18 -0800 | [diff] [blame] | 1545 | f2fs_put_dnode(&dn); |
| 1546 | unlock_out: |
Jaegeuk Kim | b4d07a3 | 2015-12-23 13:48:58 -0800 | [diff] [blame] | 1547 | if (locked) |
| 1548 | f2fs_unlock_op(sbi); |
Jaegeuk Kim | 2aadac0 | 2015-12-23 11:55:18 -0800 | [diff] [blame] | 1549 | return err; |
| 1550 | } |
| 1551 | |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 1552 | static int f2fs_write_begin(struct file *file, struct address_space *mapping, |
| 1553 | loff_t pos, unsigned len, unsigned flags, |
| 1554 | struct page **pagep, void **fsdata) |
| 1555 | { |
| 1556 | struct inode *inode = mapping->host; |
Jaegeuk Kim | 4081363 | 2014-09-02 15:31:18 -0700 | [diff] [blame] | 1557 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
Jaegeuk Kim | 86531d6 | 2015-07-15 13:08:21 -0700 | [diff] [blame] | 1558 | struct page *page = NULL; |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 1559 | pgoff_t index = ((unsigned long long) pos) >> PAGE_SHIFT; |
Jaegeuk Kim | 2aadac0 | 2015-12-23 11:55:18 -0800 | [diff] [blame] | 1560 | bool need_balance = false; |
| 1561 | block_t blkaddr = NULL_ADDR; |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 1562 | int err = 0; |
| 1563 | |
Chao Yu | 62aed04 | 2014-05-06 16:46:04 +0800 | [diff] [blame] | 1564 | trace_f2fs_write_begin(inode, pos, len, flags); |
| 1565 | |
Jaegeuk Kim | 5f72739 | 2014-11-25 10:59:45 -0800 | [diff] [blame] | 1566 | /* |
| 1567 | * We should check this at this moment to avoid deadlock on inode page |
| 1568 | * and #0 page. The locking rule for inline_data conversion should be: |
| 1569 | * lock_page(page #0) -> lock_page(inode_page) |
| 1570 | */ |
| 1571 | if (index != 0) { |
| 1572 | err = f2fs_convert_inline_inode(inode); |
| 1573 | if (err) |
| 1574 | goto fail; |
| 1575 | } |
Jaegeuk Kim | afcb7ca0 | 2013-04-26 11:55:17 +0900 | [diff] [blame] | 1576 | repeat: |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 1577 | page = grab_cache_page_write_begin(mapping, index, flags); |
Chao Yu | 3aab8f8 | 2014-07-02 13:25:04 +0800 | [diff] [blame] | 1578 | if (!page) { |
| 1579 | err = -ENOMEM; |
| 1580 | goto fail; |
| 1581 | } |
Jaegeuk Kim | d5f6699 | 2014-04-30 09:22:45 +0900 | [diff] [blame] | 1582 | |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 1583 | *pagep = page; |
| 1584 | |
Jaegeuk Kim | 2aadac0 | 2015-12-23 11:55:18 -0800 | [diff] [blame] | 1585 | err = prepare_write_begin(sbi, page, pos, len, |
| 1586 | &blkaddr, &need_balance); |
Jaegeuk Kim | 9ba69cf | 2014-10-17 20:33:55 -0700 | [diff] [blame] | 1587 | if (err) |
Jaegeuk Kim | 2aadac0 | 2015-12-23 11:55:18 -0800 | [diff] [blame] | 1588 | goto fail; |
Jaegeuk Kim | 9ba69cf | 2014-10-17 20:33:55 -0700 | [diff] [blame] | 1589 | |
Jaegeuk Kim | 2aadac0 | 2015-12-23 11:55:18 -0800 | [diff] [blame] | 1590 | if (need_balance && has_not_enough_free_secs(sbi, 0)) { |
Jaegeuk Kim | 2a34076 | 2015-12-22 13:23:35 -0800 | [diff] [blame] | 1591 | unlock_page(page); |
Jaegeuk Kim | 2c4db1a | 2016-01-07 14:15:04 -0800 | [diff] [blame] | 1592 | f2fs_balance_fs(sbi, true); |
Jaegeuk Kim | 2a34076 | 2015-12-22 13:23:35 -0800 | [diff] [blame] | 1593 | lock_page(page); |
| 1594 | if (page->mapping != mapping) { |
| 1595 | /* The page got truncated from under us */ |
| 1596 | f2fs_put_page(page, 1); |
| 1597 | goto repeat; |
| 1598 | } |
| 1599 | } |
| 1600 | |
Jaegeuk Kim | fec1d65 | 2016-01-20 23:43:51 +0800 | [diff] [blame] | 1601 | f2fs_wait_on_page_writeback(page, DATA, false); |
Jaegeuk Kim | b3d208f | 2014-10-23 19:48:09 -0700 | [diff] [blame] | 1602 | |
Chao Yu | 08b39fb | 2015-10-08 13:27:34 +0800 | [diff] [blame] | 1603 | /* wait for GCed encrypted page writeback */ |
| 1604 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) |
Jaegeuk Kim | 2aadac0 | 2015-12-23 11:55:18 -0800 | [diff] [blame] | 1605 | f2fs_wait_on_encrypted_page_writeback(sbi, blkaddr); |
Chao Yu | 08b39fb | 2015-10-08 13:27:34 +0800 | [diff] [blame] | 1606 | |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 1607 | if (len == PAGE_SIZE) |
Chao Yu | 90d4388 | 2015-07-08 18:24:38 +0800 | [diff] [blame] | 1608 | goto out_update; |
| 1609 | if (PageUptodate(page)) |
| 1610 | goto out_clear; |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 1611 | |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 1612 | if ((pos & PAGE_MASK) >= i_size_read(inode)) { |
| 1613 | unsigned start = pos & (PAGE_SIZE - 1); |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 1614 | unsigned end = start + len; |
| 1615 | |
| 1616 | /* Reading beyond i_size is simple: memset to zero */ |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 1617 | zero_user_segments(page, 0, start, end, PAGE_SIZE); |
Chao Yu | 90d4388 | 2015-07-08 18:24:38 +0800 | [diff] [blame] | 1618 | goto out_update; |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 1619 | } |
| 1620 | |
Jaegeuk Kim | 2aadac0 | 2015-12-23 11:55:18 -0800 | [diff] [blame] | 1621 | if (blkaddr == NEW_ADDR) { |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 1622 | zero_user_segment(page, 0, PAGE_SIZE); |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 1623 | } else { |
Jaegeuk Kim | cf04e8e | 2014-12-17 19:33:13 -0800 | [diff] [blame] | 1624 | struct f2fs_io_info fio = { |
Jaegeuk Kim | 05ca363 | 2015-04-23 14:38:15 -0700 | [diff] [blame] | 1625 | .sbi = sbi, |
Jaegeuk Kim | cf04e8e | 2014-12-17 19:33:13 -0800 | [diff] [blame] | 1626 | .type = DATA, |
| 1627 | .rw = READ_SYNC, |
Chao Yu | 7a9d754 | 2016-02-22 18:36:38 +0800 | [diff] [blame] | 1628 | .old_blkaddr = blkaddr, |
| 1629 | .new_blkaddr = blkaddr, |
Jaegeuk Kim | 05ca363 | 2015-04-23 14:38:15 -0700 | [diff] [blame] | 1630 | .page = page, |
Jaegeuk Kim | 4375a33 | 2015-04-23 12:04:33 -0700 | [diff] [blame] | 1631 | .encrypted_page = NULL, |
Jaegeuk Kim | cf04e8e | 2014-12-17 19:33:13 -0800 | [diff] [blame] | 1632 | }; |
Jaegeuk Kim | 05ca363 | 2015-04-23 14:38:15 -0700 | [diff] [blame] | 1633 | err = f2fs_submit_page_bio(&fio); |
Jan Kara | 9234f31 | 2014-10-22 15:21:47 +0200 | [diff] [blame] | 1634 | if (err) |
| 1635 | goto fail; |
Chao Yu | d54c795 | 2014-03-29 15:30:40 +0800 | [diff] [blame] | 1636 | |
Jaegeuk Kim | 393ff91 | 2013-03-08 21:29:23 +0900 | [diff] [blame] | 1637 | lock_page(page); |
Jaegeuk Kim | 6bacf52 | 2013-12-06 15:00:58 +0900 | [diff] [blame] | 1638 | if (unlikely(!PageUptodate(page))) { |
Chao Yu | 3aab8f8 | 2014-07-02 13:25:04 +0800 | [diff] [blame] | 1639 | err = -EIO; |
| 1640 | goto fail; |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 1641 | } |
Jaegeuk Kim | 6bacf52 | 2013-12-06 15:00:58 +0900 | [diff] [blame] | 1642 | if (unlikely(page->mapping != mapping)) { |
Jaegeuk Kim | afcb7ca0 | 2013-04-26 11:55:17 +0900 | [diff] [blame] | 1643 | f2fs_put_page(page, 1); |
| 1644 | goto repeat; |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 1645 | } |
Jaegeuk Kim | 4375a33 | 2015-04-23 12:04:33 -0700 | [diff] [blame] | 1646 | |
| 1647 | /* avoid symlink page */ |
| 1648 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) { |
Jaegeuk Kim | 0b81d07 | 2015-05-15 16:26:10 -0700 | [diff] [blame] | 1649 | err = fscrypt_decrypt_page(page); |
Jaegeuk Kim | 86531d6 | 2015-07-15 13:08:21 -0700 | [diff] [blame] | 1650 | if (err) |
Jaegeuk Kim | 4375a33 | 2015-04-23 12:04:33 -0700 | [diff] [blame] | 1651 | goto fail; |
Jaegeuk Kim | 4375a33 | 2015-04-23 12:04:33 -0700 | [diff] [blame] | 1652 | } |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 1653 | } |
Chao Yu | 90d4388 | 2015-07-08 18:24:38 +0800 | [diff] [blame] | 1654 | out_update: |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 1655 | SetPageUptodate(page); |
Chao Yu | 90d4388 | 2015-07-08 18:24:38 +0800 | [diff] [blame] | 1656 | out_clear: |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 1657 | clear_cold_data(page); |
| 1658 | return 0; |
Jaegeuk Kim | 9ba69cf | 2014-10-17 20:33:55 -0700 | [diff] [blame] | 1659 | |
Chao Yu | 3aab8f8 | 2014-07-02 13:25:04 +0800 | [diff] [blame] | 1660 | fail: |
Jaegeuk Kim | 86531d6 | 2015-07-15 13:08:21 -0700 | [diff] [blame] | 1661 | f2fs_put_page(page, 1); |
Chao Yu | 3aab8f8 | 2014-07-02 13:25:04 +0800 | [diff] [blame] | 1662 | f2fs_write_failed(mapping, pos + len); |
| 1663 | return err; |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 1664 | } |
| 1665 | |
Jaegeuk Kim | a1dd3c1 | 2013-06-27 13:04:08 +0900 | [diff] [blame] | 1666 | static int f2fs_write_end(struct file *file, |
| 1667 | struct address_space *mapping, |
| 1668 | loff_t pos, unsigned len, unsigned copied, |
| 1669 | struct page *page, void *fsdata) |
| 1670 | { |
| 1671 | struct inode *inode = page->mapping->host; |
| 1672 | |
Chao Yu | dfb2bf3 | 2014-05-06 16:47:23 +0800 | [diff] [blame] | 1673 | trace_f2fs_write_end(inode, pos, len, copied); |
| 1674 | |
Jaegeuk Kim | 34ba94b | 2014-10-09 13:19:53 -0700 | [diff] [blame] | 1675 | set_page_dirty(page); |
Jaegeuk Kim | a1dd3c1 | 2013-06-27 13:04:08 +0900 | [diff] [blame] | 1676 | |
Jaegeuk Kim | fc9581c | 2016-05-20 09:22:03 -0700 | [diff] [blame] | 1677 | if (pos + copied > i_size_read(inode)) |
| 1678 | f2fs_i_size_write(inode, pos + copied); |
Jaegeuk Kim | a1dd3c1 | 2013-06-27 13:04:08 +0900 | [diff] [blame] | 1679 | |
Chao Yu | 75c3c8b | 2013-11-16 14:15:59 +0800 | [diff] [blame] | 1680 | f2fs_put_page(page, 1); |
Jaegeuk Kim | d0239e1 | 2016-01-08 16:57:48 -0800 | [diff] [blame] | 1681 | f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); |
Jaegeuk Kim | a1dd3c1 | 2013-06-27 13:04:08 +0900 | [diff] [blame] | 1682 | return copied; |
| 1683 | } |
| 1684 | |
Omar Sandoval | 6f67376 | 2015-03-16 04:33:52 -0700 | [diff] [blame] | 1685 | static int check_direct_IO(struct inode *inode, struct iov_iter *iter, |
| 1686 | loff_t offset) |
Jaegeuk Kim | 944fcfc | 2013-12-26 20:15:09 +0900 | [diff] [blame] | 1687 | { |
| 1688 | unsigned blocksize_mask = inode->i_sb->s_blocksize - 1; |
Jaegeuk Kim | 944fcfc | 2013-12-26 20:15:09 +0900 | [diff] [blame] | 1689 | |
Jaegeuk Kim | 944fcfc | 2013-12-26 20:15:09 +0900 | [diff] [blame] | 1690 | if (offset & blocksize_mask) |
| 1691 | return -EINVAL; |
| 1692 | |
Al Viro | 5b46f25 | 2014-03-16 18:07:34 -0400 | [diff] [blame] | 1693 | if (iov_iter_alignment(iter) & blocksize_mask) |
| 1694 | return -EINVAL; |
| 1695 | |
Jaegeuk Kim | 944fcfc | 2013-12-26 20:15:09 +0900 | [diff] [blame] | 1696 | return 0; |
| 1697 | } |
| 1698 | |
Christoph Hellwig | c8b8e32 | 2016-04-07 08:51:58 -0700 | [diff] [blame] | 1699 | static ssize_t f2fs_direct_IO(struct kiocb *iocb, struct iov_iter *iter) |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 1700 | { |
Jaegeuk Kim | b439b10 | 2016-02-03 13:09:09 -0800 | [diff] [blame] | 1701 | struct address_space *mapping = iocb->ki_filp->f_mapping; |
Chao Yu | 3aab8f8 | 2014-07-02 13:25:04 +0800 | [diff] [blame] | 1702 | struct inode *inode = mapping->host; |
| 1703 | size_t count = iov_iter_count(iter); |
Christoph Hellwig | c8b8e32 | 2016-04-07 08:51:58 -0700 | [diff] [blame] | 1704 | loff_t offset = iocb->ki_pos; |
Chao Yu | 3aab8f8 | 2014-07-02 13:25:04 +0800 | [diff] [blame] | 1705 | int err; |
Jaegeuk Kim | 944fcfc | 2013-12-26 20:15:09 +0900 | [diff] [blame] | 1706 | |
Jaegeuk Kim | b439b10 | 2016-02-03 13:09:09 -0800 | [diff] [blame] | 1707 | err = check_direct_IO(inode, iter, offset); |
Jaegeuk Kim | b9d777b | 2015-12-22 11:09:35 -0800 | [diff] [blame] | 1708 | if (err) |
| 1709 | return err; |
Huajun Li | 9ffe0fb | 2013-11-10 23:13:20 +0800 | [diff] [blame] | 1710 | |
Jaegeuk Kim | fcc85a4 | 2015-04-21 20:39:58 -0700 | [diff] [blame] | 1711 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) |
| 1712 | return 0; |
Jaegeuk Kim | 36abef4 | 2016-06-03 19:29:38 -0700 | [diff] [blame^] | 1713 | if (test_opt(F2FS_I_SB(inode), LFS)) |
| 1714 | return 0; |
Jaegeuk Kim | fcc85a4 | 2015-04-21 20:39:58 -0700 | [diff] [blame] | 1715 | |
Omar Sandoval | 6f67376 | 2015-03-16 04:33:52 -0700 | [diff] [blame] | 1716 | trace_f2fs_direct_IO_enter(inode, offset, count, iov_iter_rw(iter)); |
Chao Yu | 70407fa | 2014-07-31 21:11:22 +0800 | [diff] [blame] | 1717 | |
Christoph Hellwig | c8b8e32 | 2016-04-07 08:51:58 -0700 | [diff] [blame] | 1718 | err = blockdev_direct_IO(iocb, inode, iter, get_data_block_dio); |
Jaegeuk Kim | 6bfc491 | 2016-04-18 17:07:44 -0400 | [diff] [blame] | 1719 | if (iov_iter_rw(iter) == WRITE) { |
| 1720 | if (err > 0) |
Jaegeuk Kim | 9194232 | 2016-05-20 10:13:22 -0700 | [diff] [blame] | 1721 | set_inode_flag(inode, FI_UPDATE_WRITE); |
Jaegeuk Kim | 6bfc491 | 2016-04-18 17:07:44 -0400 | [diff] [blame] | 1722 | else if (err < 0) |
| 1723 | f2fs_write_failed(mapping, offset + count); |
| 1724 | } |
Chao Yu | 70407fa | 2014-07-31 21:11:22 +0800 | [diff] [blame] | 1725 | |
Omar Sandoval | 6f67376 | 2015-03-16 04:33:52 -0700 | [diff] [blame] | 1726 | trace_f2fs_direct_IO_exit(inode, offset, count, iov_iter_rw(iter), err); |
Chao Yu | 70407fa | 2014-07-31 21:11:22 +0800 | [diff] [blame] | 1727 | |
Chao Yu | 3aab8f8 | 2014-07-02 13:25:04 +0800 | [diff] [blame] | 1728 | return err; |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 1729 | } |
| 1730 | |
Chao Yu | 487261f | 2015-02-05 17:44:29 +0800 | [diff] [blame] | 1731 | void f2fs_invalidate_page(struct page *page, unsigned int offset, |
| 1732 | unsigned int length) |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 1733 | { |
| 1734 | struct inode *inode = page->mapping->host; |
Chao Yu | 487261f | 2015-02-05 17:44:29 +0800 | [diff] [blame] | 1735 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
Jaegeuk Kim | a7ffdbe | 2014-09-12 15:53:45 -0700 | [diff] [blame] | 1736 | |
Chao Yu | 487261f | 2015-02-05 17:44:29 +0800 | [diff] [blame] | 1737 | if (inode->i_ino >= F2FS_ROOT_INO(sbi) && |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 1738 | (offset % PAGE_SIZE || length != PAGE_SIZE)) |
Jaegeuk Kim | a7ffdbe | 2014-09-12 15:53:45 -0700 | [diff] [blame] | 1739 | return; |
| 1740 | |
Chao Yu | 487261f | 2015-02-05 17:44:29 +0800 | [diff] [blame] | 1741 | if (PageDirty(page)) { |
| 1742 | if (inode->i_ino == F2FS_META_INO(sbi)) |
| 1743 | dec_page_count(sbi, F2FS_DIRTY_META); |
| 1744 | else if (inode->i_ino == F2FS_NODE_INO(sbi)) |
| 1745 | dec_page_count(sbi, F2FS_DIRTY_NODES); |
| 1746 | else |
| 1747 | inode_dec_dirty_pages(inode); |
| 1748 | } |
Chao Yu | decd36b | 2015-08-07 18:42:09 +0800 | [diff] [blame] | 1749 | |
| 1750 | /* This is atomic written page, keep Private */ |
| 1751 | if (IS_ATOMIC_WRITTEN_PAGE(page)) |
| 1752 | return; |
| 1753 | |
Chao Yu | 23dc974 | 2016-04-29 20:09:15 +0800 | [diff] [blame] | 1754 | set_page_private(page, 0); |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 1755 | ClearPagePrivate(page); |
| 1756 | } |
| 1757 | |
Chao Yu | 487261f | 2015-02-05 17:44:29 +0800 | [diff] [blame] | 1758 | int f2fs_release_page(struct page *page, gfp_t wait) |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 1759 | { |
Jaegeuk Kim | f68daee | 2015-01-30 11:39:08 -0800 | [diff] [blame] | 1760 | /* If this is dirty page, keep PagePrivate */ |
| 1761 | if (PageDirty(page)) |
| 1762 | return 0; |
| 1763 | |
Chao Yu | decd36b | 2015-08-07 18:42:09 +0800 | [diff] [blame] | 1764 | /* This is atomic written page, keep Private */ |
| 1765 | if (IS_ATOMIC_WRITTEN_PAGE(page)) |
| 1766 | return 0; |
| 1767 | |
Chao Yu | 23dc974 | 2016-04-29 20:09:15 +0800 | [diff] [blame] | 1768 | set_page_private(page, 0); |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 1769 | ClearPagePrivate(page); |
Jaegeuk Kim | c3850aa | 2013-03-14 09:24:32 +0900 | [diff] [blame] | 1770 | return 1; |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 1771 | } |
| 1772 | |
| 1773 | static int f2fs_set_data_page_dirty(struct page *page) |
| 1774 | { |
| 1775 | struct address_space *mapping = page->mapping; |
| 1776 | struct inode *inode = mapping->host; |
| 1777 | |
Jaegeuk Kim | 26c6b88 | 2013-10-24 17:53:29 +0900 | [diff] [blame] | 1778 | trace_f2fs_set_page_dirty(page, DATA); |
| 1779 | |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 1780 | SetPageUptodate(page); |
Jaegeuk Kim | 34ba94b | 2014-10-09 13:19:53 -0700 | [diff] [blame] | 1781 | |
Jaegeuk Kim | 1e84371 | 2014-12-09 06:08:59 -0800 | [diff] [blame] | 1782 | if (f2fs_is_atomic_file(inode)) { |
Chao Yu | decd36b | 2015-08-07 18:42:09 +0800 | [diff] [blame] | 1783 | if (!IS_ATOMIC_WRITTEN_PAGE(page)) { |
| 1784 | register_inmem_page(inode, page); |
| 1785 | return 1; |
| 1786 | } |
| 1787 | /* |
| 1788 | * Previously, this page has been registered, we just |
| 1789 | * return here. |
| 1790 | */ |
| 1791 | return 0; |
Jaegeuk Kim | 34ba94b | 2014-10-09 13:19:53 -0700 | [diff] [blame] | 1792 | } |
| 1793 | |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 1794 | if (!PageDirty(page)) { |
| 1795 | __set_page_dirty_nobuffers(page); |
Jaegeuk Kim | a7ffdbe | 2014-09-12 15:53:45 -0700 | [diff] [blame] | 1796 | update_dirty_page(inode, page); |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 1797 | return 1; |
| 1798 | } |
| 1799 | return 0; |
| 1800 | } |
| 1801 | |
Jaegeuk Kim | c01e54b | 2013-01-17 20:30:23 +0900 | [diff] [blame] | 1802 | static sector_t f2fs_bmap(struct address_space *mapping, sector_t block) |
| 1803 | { |
Chao Yu | 454ae7e | 2014-04-22 13:34:01 +0800 | [diff] [blame] | 1804 | struct inode *inode = mapping->host; |
| 1805 | |
Jaegeuk Kim | 1d373a0 | 2015-10-19 10:29:51 -0700 | [diff] [blame] | 1806 | if (f2fs_has_inline_data(inode)) |
| 1807 | return 0; |
| 1808 | |
| 1809 | /* make sure allocating whole blocks */ |
| 1810 | if (mapping_tagged(mapping, PAGECACHE_TAG_DIRTY)) |
| 1811 | filemap_write_and_wait(mapping); |
| 1812 | |
Chao Yu | e2b4e2b | 2015-08-19 19:11:19 +0800 | [diff] [blame] | 1813 | return generic_block_bmap(mapping, block, get_data_block_bmap); |
Chao Yu | 429511c | 2015-02-05 17:54:31 +0800 | [diff] [blame] | 1814 | } |
| 1815 | |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 1816 | const struct address_space_operations f2fs_dblock_aops = { |
| 1817 | .readpage = f2fs_read_data_page, |
| 1818 | .readpages = f2fs_read_data_pages, |
| 1819 | .writepage = f2fs_write_data_page, |
| 1820 | .writepages = f2fs_write_data_pages, |
| 1821 | .write_begin = f2fs_write_begin, |
Jaegeuk Kim | a1dd3c1 | 2013-06-27 13:04:08 +0900 | [diff] [blame] | 1822 | .write_end = f2fs_write_end, |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 1823 | .set_page_dirty = f2fs_set_data_page_dirty, |
Chao Yu | 487261f | 2015-02-05 17:44:29 +0800 | [diff] [blame] | 1824 | .invalidatepage = f2fs_invalidate_page, |
| 1825 | .releasepage = f2fs_release_page, |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 1826 | .direct_IO = f2fs_direct_IO, |
Jaegeuk Kim | c01e54b | 2013-01-17 20:30:23 +0900 | [diff] [blame] | 1827 | .bmap = f2fs_bmap, |
Jaegeuk Kim | eb47b80 | 2012-11-02 17:10:12 +0900 | [diff] [blame] | 1828 | }; |