Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 2 | * Copyright (c) 2000-2005 Silicon Graphics, Inc. |
| 3 | * All Rights Reserved. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 5 | * This program is free software; you can redistribute it and/or |
| 6 | * modify it under the terms of the GNU General Public License as |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | * published by the Free Software Foundation. |
| 8 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 9 | * This program is distributed in the hope that it would be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write the Free Software Foundation, |
| 16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #include "xfs.h" |
Dave Chinner | 70a9883 | 2013-10-23 10:36:05 +1100 | [diff] [blame] | 19 | #include "xfs_shared.h" |
Dave Chinner | 239880e | 2013-10-23 10:50:10 +1100 | [diff] [blame] | 20 | #include "xfs_format.h" |
| 21 | #include "xfs_log_format.h" |
| 22 | #include "xfs_trans_resv.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | #include "xfs_mount.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #include "xfs_inode.h" |
Dave Chinner | 239880e | 2013-10-23 10:50:10 +1100 | [diff] [blame] | 25 | #include "xfs_trans.h" |
Christoph Hellwig | 281627d | 2012-03-13 08:41:05 +0000 | [diff] [blame] | 26 | #include "xfs_inode_item.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 27 | #include "xfs_alloc.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | #include "xfs_error.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | #include "xfs_iomap.h" |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 30 | #include "xfs_trace.h" |
Dave Chinner | 3ed3a43 | 2010-03-05 02:00:42 +0000 | [diff] [blame] | 31 | #include "xfs_bmap.h" |
Dave Chinner | 6898811 | 2013-08-12 20:49:42 +1000 | [diff] [blame] | 32 | #include "xfs_bmap_util.h" |
Dave Chinner | a4fbe6a | 2013-10-23 10:51:50 +1100 | [diff] [blame] | 33 | #include "xfs_bmap_btree.h" |
Darrick J. Wong | ef47366 | 2016-10-03 09:11:34 -0700 | [diff] [blame] | 34 | #include "xfs_reflink.h" |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 35 | #include <linux/gfp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | #include <linux/mpage.h> |
Christoph Hellwig | 10ce444 | 2006-01-11 20:48:14 +1100 | [diff] [blame] | 37 | #include <linux/pagevec.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | #include <linux/writeback.h> |
| 39 | |
Dave Chinner | fbcc025 | 2016-02-15 17:21:19 +1100 | [diff] [blame] | 40 | /* |
| 41 | * structure owned by writepages passed to individual writepage calls |
| 42 | */ |
| 43 | struct xfs_writepage_ctx { |
| 44 | struct xfs_bmbt_irec imap; |
| 45 | bool imap_valid; |
| 46 | unsigned int io_type; |
Dave Chinner | fbcc025 | 2016-02-15 17:21:19 +1100 | [diff] [blame] | 47 | struct xfs_ioend *ioend; |
| 48 | sector_t last_block; |
| 49 | }; |
| 50 | |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 51 | void |
Nathan Scott | f51623b | 2006-03-14 13:26:27 +1100 | [diff] [blame] | 52 | xfs_count_page_state( |
| 53 | struct page *page, |
| 54 | int *delalloc, |
Nathan Scott | f51623b | 2006-03-14 13:26:27 +1100 | [diff] [blame] | 55 | int *unwritten) |
| 56 | { |
| 57 | struct buffer_head *bh, *head; |
| 58 | |
Christoph Hellwig | 20cb52e | 2010-06-24 09:46:01 +1000 | [diff] [blame] | 59 | *delalloc = *unwritten = 0; |
Nathan Scott | f51623b | 2006-03-14 13:26:27 +1100 | [diff] [blame] | 60 | |
| 61 | bh = head = page_buffers(page); |
| 62 | do { |
Christoph Hellwig | 20cb52e | 2010-06-24 09:46:01 +1000 | [diff] [blame] | 63 | if (buffer_unwritten(bh)) |
Nathan Scott | f51623b | 2006-03-14 13:26:27 +1100 | [diff] [blame] | 64 | (*unwritten) = 1; |
| 65 | else if (buffer_delay(bh)) |
| 66 | (*delalloc) = 1; |
| 67 | } while ((bh = bh->b_this_page) != head); |
| 68 | } |
| 69 | |
Ross Zwisler | 20a90f5 | 2016-02-26 15:19:52 -0800 | [diff] [blame] | 70 | struct block_device * |
Christoph Hellwig | 6214ed4 | 2007-09-14 15:23:17 +1000 | [diff] [blame] | 71 | xfs_find_bdev_for_inode( |
Christoph Hellwig | 046f168 | 2010-04-28 12:28:52 +0000 | [diff] [blame] | 72 | struct inode *inode) |
Christoph Hellwig | 6214ed4 | 2007-09-14 15:23:17 +1000 | [diff] [blame] | 73 | { |
Christoph Hellwig | 046f168 | 2010-04-28 12:28:52 +0000 | [diff] [blame] | 74 | struct xfs_inode *ip = XFS_I(inode); |
Christoph Hellwig | 6214ed4 | 2007-09-14 15:23:17 +1000 | [diff] [blame] | 75 | struct xfs_mount *mp = ip->i_mount; |
| 76 | |
Eric Sandeen | 71ddabb | 2007-11-23 16:29:42 +1100 | [diff] [blame] | 77 | if (XFS_IS_REALTIME_INODE(ip)) |
Christoph Hellwig | 6214ed4 | 2007-09-14 15:23:17 +1000 | [diff] [blame] | 78 | return mp->m_rtdev_targp->bt_bdev; |
| 79 | else |
| 80 | return mp->m_ddev_targp->bt_bdev; |
| 81 | } |
| 82 | |
Christoph Hellwig | 0829c36 | 2005-09-02 16:58:49 +1000 | [diff] [blame] | 83 | /* |
Dave Chinner | 37992c1 | 2016-04-06 08:12:28 +1000 | [diff] [blame] | 84 | * We're now finished for good with this page. Update the page state via the |
| 85 | * associated buffer_heads, paying attention to the start and end offsets that |
| 86 | * we need to process on the page. |
Dave Chinner | 28b783e | 2016-07-22 09:56:38 +1000 | [diff] [blame] | 87 | * |
| 88 | * Landmine Warning: bh->b_end_io() will call end_page_writeback() on the last |
| 89 | * buffer in the IO. Once it does this, it is unsafe to access the bufferhead or |
| 90 | * the page at all, as we may be racing with memory reclaim and it can free both |
| 91 | * the bufferhead chain and the page as it will see the page as clean and |
| 92 | * unused. |
Dave Chinner | 37992c1 | 2016-04-06 08:12:28 +1000 | [diff] [blame] | 93 | */ |
| 94 | static void |
| 95 | xfs_finish_page_writeback( |
| 96 | struct inode *inode, |
| 97 | struct bio_vec *bvec, |
| 98 | int error) |
| 99 | { |
Dave Chinner | 37992c1 | 2016-04-06 08:12:28 +1000 | [diff] [blame] | 100 | unsigned int end = bvec->bv_offset + bvec->bv_len - 1; |
Dave Chinner | 28b783e | 2016-07-22 09:56:38 +1000 | [diff] [blame] | 101 | struct buffer_head *head, *bh, *next; |
Dave Chinner | 37992c1 | 2016-04-06 08:12:28 +1000 | [diff] [blame] | 102 | unsigned int off = 0; |
Dave Chinner | 28b783e | 2016-07-22 09:56:38 +1000 | [diff] [blame] | 103 | unsigned int bsize; |
Dave Chinner | 37992c1 | 2016-04-06 08:12:28 +1000 | [diff] [blame] | 104 | |
| 105 | ASSERT(bvec->bv_offset < PAGE_SIZE); |
Fabian Frederick | 9340747 | 2017-02-27 14:28:32 -0800 | [diff] [blame] | 106 | ASSERT((bvec->bv_offset & (i_blocksize(inode) - 1)) == 0); |
Dave Chinner | 37992c1 | 2016-04-06 08:12:28 +1000 | [diff] [blame] | 107 | ASSERT(end < PAGE_SIZE); |
Fabian Frederick | 9340747 | 2017-02-27 14:28:32 -0800 | [diff] [blame] | 108 | ASSERT((bvec->bv_len & (i_blocksize(inode) - 1)) == 0); |
Dave Chinner | 37992c1 | 2016-04-06 08:12:28 +1000 | [diff] [blame] | 109 | |
| 110 | bh = head = page_buffers(bvec->bv_page); |
| 111 | |
Dave Chinner | 28b783e | 2016-07-22 09:56:38 +1000 | [diff] [blame] | 112 | bsize = bh->b_size; |
Dave Chinner | 37992c1 | 2016-04-06 08:12:28 +1000 | [diff] [blame] | 113 | do { |
Eryu Guan | 161f55e | 2017-05-02 13:54:47 -0700 | [diff] [blame] | 114 | if (off > end) |
| 115 | break; |
Dave Chinner | 28b783e | 2016-07-22 09:56:38 +1000 | [diff] [blame] | 116 | next = bh->b_this_page; |
Dave Chinner | 37992c1 | 2016-04-06 08:12:28 +1000 | [diff] [blame] | 117 | if (off < bvec->bv_offset) |
| 118 | goto next_bh; |
Dave Chinner | 37992c1 | 2016-04-06 08:12:28 +1000 | [diff] [blame] | 119 | bh->b_end_io(bh, !error); |
| 120 | next_bh: |
Dave Chinner | 28b783e | 2016-07-22 09:56:38 +1000 | [diff] [blame] | 121 | off += bsize; |
| 122 | } while ((bh = next) != head); |
Dave Chinner | 37992c1 | 2016-04-06 08:12:28 +1000 | [diff] [blame] | 123 | } |
| 124 | |
| 125 | /* |
| 126 | * We're now finished for good with this ioend structure. Update the page |
| 127 | * state, release holds on bios, and finally free up memory. Do not use the |
| 128 | * ioend after this. |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 129 | */ |
Christoph Hellwig | 0829c36 | 2005-09-02 16:58:49 +1000 | [diff] [blame] | 130 | STATIC void |
| 131 | xfs_destroy_ioend( |
Christoph Hellwig | 0e51a8e | 2016-04-06 08:34:30 +1000 | [diff] [blame] | 132 | struct xfs_ioend *ioend, |
| 133 | int error) |
Christoph Hellwig | 0829c36 | 2005-09-02 16:58:49 +1000 | [diff] [blame] | 134 | { |
Dave Chinner | 37992c1 | 2016-04-06 08:12:28 +1000 | [diff] [blame] | 135 | struct inode *inode = ioend->io_inode; |
Christoph Hellwig | 0e51a8e | 2016-04-06 08:34:30 +1000 | [diff] [blame] | 136 | struct bio *last = ioend->io_bio; |
Dave Chinner | 37992c1 | 2016-04-06 08:12:28 +1000 | [diff] [blame] | 137 | struct bio *bio, *next; |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 138 | |
Christoph Hellwig | 0e51a8e | 2016-04-06 08:34:30 +1000 | [diff] [blame] | 139 | for (bio = &ioend->io_inline_bio; bio; bio = next) { |
Dave Chinner | 37992c1 | 2016-04-06 08:12:28 +1000 | [diff] [blame] | 140 | struct bio_vec *bvec; |
| 141 | int i; |
| 142 | |
Christoph Hellwig | 0e51a8e | 2016-04-06 08:34:30 +1000 | [diff] [blame] | 143 | /* |
| 144 | * For the last bio, bi_private points to the ioend, so we |
| 145 | * need to explicitly end the iteration here. |
| 146 | */ |
| 147 | if (bio == last) |
| 148 | next = NULL; |
| 149 | else |
| 150 | next = bio->bi_private; |
Dave Chinner | 37992c1 | 2016-04-06 08:12:28 +1000 | [diff] [blame] | 151 | |
| 152 | /* walk each page on bio, ending page IO on them */ |
| 153 | bio_for_each_segment_all(bvec, bio, i) |
| 154 | xfs_finish_page_writeback(inode, bvec, error); |
| 155 | |
| 156 | bio_put(bio); |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 157 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | } |
| 159 | |
| 160 | /* |
Christoph Hellwig | fc0063c | 2011-08-23 08:28:11 +0000 | [diff] [blame] | 161 | * Fast and loose check if this write could update the on-disk inode size. |
| 162 | */ |
| 163 | static inline bool xfs_ioend_is_append(struct xfs_ioend *ioend) |
| 164 | { |
| 165 | return ioend->io_offset + ioend->io_size > |
| 166 | XFS_I(ioend->io_inode)->i_d.di_size; |
| 167 | } |
| 168 | |
Christoph Hellwig | 281627d | 2012-03-13 08:41:05 +0000 | [diff] [blame] | 169 | STATIC int |
| 170 | xfs_setfilesize_trans_alloc( |
| 171 | struct xfs_ioend *ioend) |
| 172 | { |
| 173 | struct xfs_mount *mp = XFS_I(ioend->io_inode)->i_mount; |
| 174 | struct xfs_trans *tp; |
| 175 | int error; |
| 176 | |
Christoph Hellwig | 253f491 | 2016-04-06 09:19:55 +1000 | [diff] [blame] | 177 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_fsyncts, 0, 0, 0, &tp); |
| 178 | if (error) |
Christoph Hellwig | 281627d | 2012-03-13 08:41:05 +0000 | [diff] [blame] | 179 | return error; |
Christoph Hellwig | 281627d | 2012-03-13 08:41:05 +0000 | [diff] [blame] | 180 | |
| 181 | ioend->io_append_trans = tp; |
| 182 | |
| 183 | /* |
Dave Chinner | 437a255 | 2012-11-28 13:01:00 +1100 | [diff] [blame] | 184 | * We may pass freeze protection with a transaction. So tell lockdep |
Jan Kara | d9457dc | 2012-06-12 16:20:39 +0200 | [diff] [blame] | 185 | * we released it. |
| 186 | */ |
Oleg Nesterov | bee9182 | 2015-07-19 23:48:20 +0200 | [diff] [blame] | 187 | __sb_writers_release(ioend->io_inode->i_sb, SB_FREEZE_FS); |
Jan Kara | d9457dc | 2012-06-12 16:20:39 +0200 | [diff] [blame] | 188 | /* |
Christoph Hellwig | 281627d | 2012-03-13 08:41:05 +0000 | [diff] [blame] | 189 | * We hand off the transaction to the completion thread now, so |
| 190 | * clear the flag here. |
| 191 | */ |
Michal Hocko | 9070733 | 2017-05-03 14:53:12 -0700 | [diff] [blame] | 192 | current_restore_flags_nested(&tp->t_pflags, PF_MEMALLOC_NOFS); |
Christoph Hellwig | 281627d | 2012-03-13 08:41:05 +0000 | [diff] [blame] | 193 | return 0; |
| 194 | } |
| 195 | |
Christoph Hellwig | fc0063c | 2011-08-23 08:28:11 +0000 | [diff] [blame] | 196 | /* |
Christoph Hellwig | 2813d68 | 2011-12-18 20:00:12 +0000 | [diff] [blame] | 197 | * Update on-disk file size now that data has been written to disk. |
Lachlan McIlroy | ba87ea6 | 2007-05-08 13:49:46 +1000 | [diff] [blame] | 198 | */ |
Christoph Hellwig | 281627d | 2012-03-13 08:41:05 +0000 | [diff] [blame] | 199 | STATIC int |
Christoph Hellwig | e372843 | 2016-09-19 11:26:41 +1000 | [diff] [blame] | 200 | __xfs_setfilesize( |
Christoph Hellwig | 2ba6623 | 2015-02-02 10:02:09 +1100 | [diff] [blame] | 201 | struct xfs_inode *ip, |
| 202 | struct xfs_trans *tp, |
| 203 | xfs_off_t offset, |
| 204 | size_t size) |
Lachlan McIlroy | ba87ea6 | 2007-05-08 13:49:46 +1000 | [diff] [blame] | 205 | { |
Lachlan McIlroy | ba87ea6 | 2007-05-08 13:49:46 +1000 | [diff] [blame] | 206 | xfs_fsize_t isize; |
Lachlan McIlroy | ba87ea6 | 2007-05-08 13:49:46 +1000 | [diff] [blame] | 207 | |
Christoph Hellwig | aa6bf01 | 2012-02-29 09:53:48 +0000 | [diff] [blame] | 208 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
Christoph Hellwig | 2ba6623 | 2015-02-02 10:02:09 +1100 | [diff] [blame] | 209 | isize = xfs_new_eof(ip, offset + size); |
Christoph Hellwig | 281627d | 2012-03-13 08:41:05 +0000 | [diff] [blame] | 210 | if (!isize) { |
| 211 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
Christoph Hellwig | 4906e21 | 2015-06-04 13:47:56 +1000 | [diff] [blame] | 212 | xfs_trans_cancel(tp); |
Christoph Hellwig | 281627d | 2012-03-13 08:41:05 +0000 | [diff] [blame] | 213 | return 0; |
Lachlan McIlroy | ba87ea6 | 2007-05-08 13:49:46 +1000 | [diff] [blame] | 214 | } |
| 215 | |
Christoph Hellwig | 2ba6623 | 2015-02-02 10:02:09 +1100 | [diff] [blame] | 216 | trace_xfs_setfilesize(ip, offset, size); |
Christoph Hellwig | 281627d | 2012-03-13 08:41:05 +0000 | [diff] [blame] | 217 | |
| 218 | ip->i_d.di_size = isize; |
| 219 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); |
| 220 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
| 221 | |
Christoph Hellwig | 7039331 | 2015-06-04 13:48:08 +1000 | [diff] [blame] | 222 | return xfs_trans_commit(tp); |
Christoph Hellwig | 0829c36 | 2005-09-02 16:58:49 +1000 | [diff] [blame] | 223 | } |
| 224 | |
Christoph Hellwig | e372843 | 2016-09-19 11:26:41 +1000 | [diff] [blame] | 225 | int |
| 226 | xfs_setfilesize( |
| 227 | struct xfs_inode *ip, |
| 228 | xfs_off_t offset, |
| 229 | size_t size) |
| 230 | { |
| 231 | struct xfs_mount *mp = ip->i_mount; |
| 232 | struct xfs_trans *tp; |
| 233 | int error; |
| 234 | |
| 235 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_fsyncts, 0, 0, 0, &tp); |
| 236 | if (error) |
| 237 | return error; |
| 238 | |
| 239 | return __xfs_setfilesize(ip, tp, offset, size); |
| 240 | } |
| 241 | |
Christoph Hellwig | 2ba6623 | 2015-02-02 10:02:09 +1100 | [diff] [blame] | 242 | STATIC int |
| 243 | xfs_setfilesize_ioend( |
Christoph Hellwig | 0e51a8e | 2016-04-06 08:34:30 +1000 | [diff] [blame] | 244 | struct xfs_ioend *ioend, |
| 245 | int error) |
Christoph Hellwig | 2ba6623 | 2015-02-02 10:02:09 +1100 | [diff] [blame] | 246 | { |
| 247 | struct xfs_inode *ip = XFS_I(ioend->io_inode); |
| 248 | struct xfs_trans *tp = ioend->io_append_trans; |
| 249 | |
| 250 | /* |
| 251 | * The transaction may have been allocated in the I/O submission thread, |
| 252 | * thus we need to mark ourselves as being in a transaction manually. |
| 253 | * Similarly for freeze protection. |
| 254 | */ |
Michal Hocko | 9070733 | 2017-05-03 14:53:12 -0700 | [diff] [blame] | 255 | current_set_flags_nested(&tp->t_pflags, PF_MEMALLOC_NOFS); |
Oleg Nesterov | bee9182 | 2015-07-19 23:48:20 +0200 | [diff] [blame] | 256 | __sb_writers_acquired(VFS_I(ip)->i_sb, SB_FREEZE_FS); |
Christoph Hellwig | 2ba6623 | 2015-02-02 10:02:09 +1100 | [diff] [blame] | 257 | |
Zhaohongjiang | 5cb13dc | 2015-10-12 15:28:39 +1100 | [diff] [blame] | 258 | /* we abort the update if there was an IO error */ |
Christoph Hellwig | 0e51a8e | 2016-04-06 08:34:30 +1000 | [diff] [blame] | 259 | if (error) { |
Zhaohongjiang | 5cb13dc | 2015-10-12 15:28:39 +1100 | [diff] [blame] | 260 | xfs_trans_cancel(tp); |
Christoph Hellwig | 0e51a8e | 2016-04-06 08:34:30 +1000 | [diff] [blame] | 261 | return error; |
Zhaohongjiang | 5cb13dc | 2015-10-12 15:28:39 +1100 | [diff] [blame] | 262 | } |
| 263 | |
Christoph Hellwig | e372843 | 2016-09-19 11:26:41 +1000 | [diff] [blame] | 264 | return __xfs_setfilesize(ip, tp, ioend->io_offset, ioend->io_size); |
Christoph Hellwig | 2ba6623 | 2015-02-02 10:02:09 +1100 | [diff] [blame] | 265 | } |
| 266 | |
Christoph Hellwig | 0829c36 | 2005-09-02 16:58:49 +1000 | [diff] [blame] | 267 | /* |
Dave Chinner | 77d7a0c | 2010-02-17 05:36:29 +0000 | [diff] [blame] | 268 | * IO write completion. |
| 269 | */ |
| 270 | STATIC void |
| 271 | xfs_end_io( |
| 272 | struct work_struct *work) |
| 273 | { |
Christoph Hellwig | 0e51a8e | 2016-04-06 08:34:30 +1000 | [diff] [blame] | 274 | struct xfs_ioend *ioend = |
| 275 | container_of(work, struct xfs_ioend, io_work); |
| 276 | struct xfs_inode *ip = XFS_I(ioend->io_inode); |
Christoph Hellwig | 787eb48 | 2017-03-02 15:02:51 -0800 | [diff] [blame] | 277 | xfs_off_t offset = ioend->io_offset; |
| 278 | size_t size = ioend->io_size; |
Christoph Hellwig | 0e51a8e | 2016-04-06 08:34:30 +1000 | [diff] [blame] | 279 | int error = ioend->io_bio->bi_error; |
Dave Chinner | 77d7a0c | 2010-02-17 05:36:29 +0000 | [diff] [blame] | 280 | |
Brian Foster | af055e3 | 2016-02-08 15:00:02 +1100 | [diff] [blame] | 281 | /* |
Christoph Hellwig | 787eb48 | 2017-03-02 15:02:51 -0800 | [diff] [blame] | 282 | * Just clean up the in-memory strutures if the fs has been shut down. |
Brian Foster | af055e3 | 2016-02-08 15:00:02 +1100 | [diff] [blame] | 283 | */ |
Christoph Hellwig | 787eb48 | 2017-03-02 15:02:51 -0800 | [diff] [blame] | 284 | if (XFS_FORCED_SHUTDOWN(ip->i_mount)) { |
Christoph Hellwig | 0e51a8e | 2016-04-06 08:34:30 +1000 | [diff] [blame] | 285 | error = -EIO; |
Christoph Hellwig | 787eb48 | 2017-03-02 15:02:51 -0800 | [diff] [blame] | 286 | goto done; |
Darrick J. Wong | 43caeb1 | 2016-10-03 09:11:35 -0700 | [diff] [blame] | 287 | } |
| 288 | |
| 289 | /* |
Christoph Hellwig | 787eb48 | 2017-03-02 15:02:51 -0800 | [diff] [blame] | 290 | * Clean up any COW blocks on an I/O error. |
Dave Chinner | 77d7a0c | 2010-02-17 05:36:29 +0000 | [diff] [blame] | 291 | */ |
Christoph Hellwig | 787eb48 | 2017-03-02 15:02:51 -0800 | [diff] [blame] | 292 | if (unlikely(error)) { |
| 293 | switch (ioend->io_type) { |
| 294 | case XFS_IO_COW: |
| 295 | xfs_reflink_cancel_cow_range(ip, offset, size, true); |
| 296 | break; |
| 297 | } |
| 298 | |
| 299 | goto done; |
| 300 | } |
| 301 | |
| 302 | /* |
| 303 | * Success: commit the COW or unwritten blocks if needed. |
| 304 | */ |
| 305 | switch (ioend->io_type) { |
| 306 | case XFS_IO_COW: |
| 307 | error = xfs_reflink_end_cow(ip, offset, size); |
| 308 | break; |
| 309 | case XFS_IO_UNWRITTEN: |
| 310 | error = xfs_iomap_write_unwritten(ip, offset, size); |
| 311 | break; |
| 312 | default: |
| 313 | ASSERT(!xfs_ioend_is_append(ioend) || ioend->io_append_trans); |
| 314 | break; |
Dave Chinner | 77d7a0c | 2010-02-17 05:36:29 +0000 | [diff] [blame] | 315 | } |
| 316 | |
Christoph Hellwig | 04f658e | 2011-08-24 05:59:25 +0000 | [diff] [blame] | 317 | done: |
Christoph Hellwig | 787eb48 | 2017-03-02 15:02:51 -0800 | [diff] [blame] | 318 | if (ioend->io_append_trans) |
| 319 | error = xfs_setfilesize_ioend(ioend, error); |
Christoph Hellwig | 0e51a8e | 2016-04-06 08:34:30 +1000 | [diff] [blame] | 320 | xfs_destroy_ioend(ioend, error); |
Dave Chinner | 77d7a0c | 2010-02-17 05:36:29 +0000 | [diff] [blame] | 321 | } |
| 322 | |
Christoph Hellwig | 0e51a8e | 2016-04-06 08:34:30 +1000 | [diff] [blame] | 323 | STATIC void |
| 324 | xfs_end_bio( |
| 325 | struct bio *bio) |
Christoph Hellwig | 0829c36 | 2005-09-02 16:58:49 +1000 | [diff] [blame] | 326 | { |
Christoph Hellwig | 0e51a8e | 2016-04-06 08:34:30 +1000 | [diff] [blame] | 327 | struct xfs_ioend *ioend = bio->bi_private; |
| 328 | struct xfs_mount *mp = XFS_I(ioend->io_inode)->i_mount; |
Christoph Hellwig | 0829c36 | 2005-09-02 16:58:49 +1000 | [diff] [blame] | 329 | |
Darrick J. Wong | 43caeb1 | 2016-10-03 09:11:35 -0700 | [diff] [blame] | 330 | if (ioend->io_type == XFS_IO_UNWRITTEN || ioend->io_type == XFS_IO_COW) |
Christoph Hellwig | 0e51a8e | 2016-04-06 08:34:30 +1000 | [diff] [blame] | 331 | queue_work(mp->m_unwritten_workqueue, &ioend->io_work); |
| 332 | else if (ioend->io_append_trans) |
| 333 | queue_work(mp->m_data_workqueue, &ioend->io_work); |
| 334 | else |
| 335 | xfs_destroy_ioend(ioend, bio->bi_error); |
Christoph Hellwig | 0829c36 | 2005-09-02 16:58:49 +1000 | [diff] [blame] | 336 | } |
| 337 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | STATIC int |
| 339 | xfs_map_blocks( |
| 340 | struct inode *inode, |
| 341 | loff_t offset, |
Christoph Hellwig | 207d041 | 2010-04-28 12:28:56 +0000 | [diff] [blame] | 342 | struct xfs_bmbt_irec *imap, |
Dave Chinner | 988ef92 | 2016-02-15 17:20:50 +1100 | [diff] [blame] | 343 | int type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | { |
Christoph Hellwig | a206c81 | 2010-12-10 08:42:20 +0000 | [diff] [blame] | 345 | struct xfs_inode *ip = XFS_I(inode); |
| 346 | struct xfs_mount *mp = ip->i_mount; |
Fabian Frederick | 9340747 | 2017-02-27 14:28:32 -0800 | [diff] [blame] | 347 | ssize_t count = i_blocksize(inode); |
Christoph Hellwig | a206c81 | 2010-12-10 08:42:20 +0000 | [diff] [blame] | 348 | xfs_fileoff_t offset_fsb, end_fsb; |
| 349 | int error = 0; |
Christoph Hellwig | a206c81 | 2010-12-10 08:42:20 +0000 | [diff] [blame] | 350 | int bmapi_flags = XFS_BMAPI_ENTIRE; |
| 351 | int nimaps = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | |
Christoph Hellwig | a206c81 | 2010-12-10 08:42:20 +0000 | [diff] [blame] | 353 | if (XFS_FORCED_SHUTDOWN(mp)) |
Eric Sandeen | b474c7a | 2014-06-22 15:04:54 +1000 | [diff] [blame] | 354 | return -EIO; |
Christoph Hellwig | a206c81 | 2010-12-10 08:42:20 +0000 | [diff] [blame] | 355 | |
Darrick J. Wong | ef47366 | 2016-10-03 09:11:34 -0700 | [diff] [blame] | 356 | ASSERT(type != XFS_IO_COW); |
Alain Renaud | 0d882a3 | 2012-05-22 15:56:21 -0500 | [diff] [blame] | 357 | if (type == XFS_IO_UNWRITTEN) |
Christoph Hellwig | a206c81 | 2010-12-10 08:42:20 +0000 | [diff] [blame] | 358 | bmapi_flags |= XFS_BMAPI_IGSTATE; |
Christoph Hellwig | a206c81 | 2010-12-10 08:42:20 +0000 | [diff] [blame] | 359 | |
Dave Chinner | 988ef92 | 2016-02-15 17:20:50 +1100 | [diff] [blame] | 360 | xfs_ilock(ip, XFS_ILOCK_SHARED); |
Christoph Hellwig | 8ff2957 | 2010-12-10 08:42:21 +0000 | [diff] [blame] | 361 | ASSERT(ip->i_d.di_format != XFS_DINODE_FMT_BTREE || |
| 362 | (ip->i_df.if_flags & XFS_IFEXTENTS)); |
Dave Chinner | d2c2819 | 2012-06-08 15:44:53 +1000 | [diff] [blame] | 363 | ASSERT(offset <= mp->m_super->s_maxbytes); |
Christoph Hellwig | 8ff2957 | 2010-12-10 08:42:21 +0000 | [diff] [blame] | 364 | |
Dave Chinner | d2c2819 | 2012-06-08 15:44:53 +1000 | [diff] [blame] | 365 | if (offset + count > mp->m_super->s_maxbytes) |
| 366 | count = mp->m_super->s_maxbytes - offset; |
Christoph Hellwig | a206c81 | 2010-12-10 08:42:20 +0000 | [diff] [blame] | 367 | end_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)offset + count); |
| 368 | offset_fsb = XFS_B_TO_FSBT(mp, offset); |
Dave Chinner | 5c8ed20 | 2011-09-18 20:40:45 +0000 | [diff] [blame] | 369 | error = xfs_bmapi_read(ip, offset_fsb, end_fsb - offset_fsb, |
| 370 | imap, &nimaps, bmapi_flags); |
Darrick J. Wong | ef47366 | 2016-10-03 09:11:34 -0700 | [diff] [blame] | 371 | /* |
| 372 | * Truncate an overwrite extent if there's a pending CoW |
| 373 | * reservation before the end of this extent. This forces us |
| 374 | * to come back to writepage to take care of the CoW. |
| 375 | */ |
| 376 | if (nimaps && type == XFS_IO_OVERWRITE) |
| 377 | xfs_reflink_trim_irec_to_next_cow(ip, offset_fsb, imap); |
Christoph Hellwig | 8ff2957 | 2010-12-10 08:42:21 +0000 | [diff] [blame] | 378 | xfs_iunlock(ip, XFS_ILOCK_SHARED); |
| 379 | |
Christoph Hellwig | a206c81 | 2010-12-10 08:42:20 +0000 | [diff] [blame] | 380 | if (error) |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 381 | return error; |
Christoph Hellwig | a206c81 | 2010-12-10 08:42:20 +0000 | [diff] [blame] | 382 | |
Alain Renaud | 0d882a3 | 2012-05-22 15:56:21 -0500 | [diff] [blame] | 383 | if (type == XFS_IO_DELALLOC && |
Christoph Hellwig | 8ff2957 | 2010-12-10 08:42:21 +0000 | [diff] [blame] | 384 | (!nimaps || isnullstartblock(imap->br_startblock))) { |
Darrick J. Wong | 60b4984 | 2016-10-03 09:11:34 -0700 | [diff] [blame] | 385 | error = xfs_iomap_write_allocate(ip, XFS_DATA_FORK, offset, |
| 386 | imap); |
Christoph Hellwig | a206c81 | 2010-12-10 08:42:20 +0000 | [diff] [blame] | 387 | if (!error) |
Darrick J. Wong | ef47366 | 2016-10-03 09:11:34 -0700 | [diff] [blame] | 388 | trace_xfs_map_blocks_alloc(ip, offset, count, type, imap); |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 389 | return error; |
Christoph Hellwig | a206c81 | 2010-12-10 08:42:20 +0000 | [diff] [blame] | 390 | } |
| 391 | |
Christoph Hellwig | 8ff2957 | 2010-12-10 08:42:21 +0000 | [diff] [blame] | 392 | #ifdef DEBUG |
Alain Renaud | 0d882a3 | 2012-05-22 15:56:21 -0500 | [diff] [blame] | 393 | if (type == XFS_IO_UNWRITTEN) { |
Christoph Hellwig | 8ff2957 | 2010-12-10 08:42:21 +0000 | [diff] [blame] | 394 | ASSERT(nimaps); |
| 395 | ASSERT(imap->br_startblock != HOLESTARTBLOCK); |
| 396 | ASSERT(imap->br_startblock != DELAYSTARTBLOCK); |
| 397 | } |
| 398 | #endif |
| 399 | if (nimaps) |
| 400 | trace_xfs_map_blocks_found(ip, offset, count, type, imap); |
| 401 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | } |
| 403 | |
Dave Chinner | fbcc025 | 2016-02-15 17:21:19 +1100 | [diff] [blame] | 404 | STATIC bool |
Christoph Hellwig | 558e689 | 2010-04-28 12:28:58 +0000 | [diff] [blame] | 405 | xfs_imap_valid( |
Christoph Hellwig | 8699bb0 | 2010-04-28 12:28:54 +0000 | [diff] [blame] | 406 | struct inode *inode, |
Christoph Hellwig | 207d041 | 2010-04-28 12:28:56 +0000 | [diff] [blame] | 407 | struct xfs_bmbt_irec *imap, |
Christoph Hellwig | 558e689 | 2010-04-28 12:28:58 +0000 | [diff] [blame] | 408 | xfs_off_t offset) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | { |
Christoph Hellwig | 558e689 | 2010-04-28 12:28:58 +0000 | [diff] [blame] | 410 | offset >>= inode->i_blkbits; |
Christoph Hellwig | 8699bb0 | 2010-04-28 12:28:54 +0000 | [diff] [blame] | 411 | |
Christoph Hellwig | 558e689 | 2010-04-28 12:28:58 +0000 | [diff] [blame] | 412 | return offset >= imap->br_startoff && |
| 413 | offset < imap->br_startoff + imap->br_blockcount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | } |
| 415 | |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 416 | STATIC void |
| 417 | xfs_start_buffer_writeback( |
| 418 | struct buffer_head *bh) |
| 419 | { |
| 420 | ASSERT(buffer_mapped(bh)); |
| 421 | ASSERT(buffer_locked(bh)); |
| 422 | ASSERT(!buffer_delay(bh)); |
| 423 | ASSERT(!buffer_unwritten(bh)); |
| 424 | |
| 425 | mark_buffer_async_write(bh); |
| 426 | set_buffer_uptodate(bh); |
| 427 | clear_buffer_dirty(bh); |
| 428 | } |
| 429 | |
| 430 | STATIC void |
| 431 | xfs_start_page_writeback( |
| 432 | struct page *page, |
Dave Chinner | e10de37 | 2016-02-15 17:23:12 +1100 | [diff] [blame] | 433 | int clear_dirty) |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 434 | { |
| 435 | ASSERT(PageLocked(page)); |
| 436 | ASSERT(!PageWriteback(page)); |
Dave Chinner | 0d085a5 | 2014-09-23 15:36:27 +1000 | [diff] [blame] | 437 | |
| 438 | /* |
| 439 | * if the page was not fully cleaned, we need to ensure that the higher |
| 440 | * layers come back to it correctly. That means we need to keep the page |
| 441 | * dirty, and for WB_SYNC_ALL writeback we need to ensure the |
| 442 | * PAGECACHE_TAG_TOWRITE index mark is not removed so another attempt to |
| 443 | * write this page in this writeback sweep will be made. |
| 444 | */ |
| 445 | if (clear_dirty) { |
David Chinner | 9213202 | 2006-12-21 10:24:01 +1100 | [diff] [blame] | 446 | clear_page_dirty_for_io(page); |
Dave Chinner | 0d085a5 | 2014-09-23 15:36:27 +1000 | [diff] [blame] | 447 | set_page_writeback(page); |
| 448 | } else |
| 449 | set_page_writeback_keepwrite(page); |
| 450 | |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 451 | unlock_page(page); |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 452 | } |
| 453 | |
Zhi Yong Wu | c7c1a7d | 2013-08-07 10:11:09 +0000 | [diff] [blame] | 454 | static inline int xfs_bio_add_buffer(struct bio *bio, struct buffer_head *bh) |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 455 | { |
| 456 | return bio_add_page(bio, bh->b_page, bh->b_size, bh_offset(bh)); |
| 457 | } |
| 458 | |
| 459 | /* |
Dave Chinner | bb18782 | 2016-04-06 08:11:25 +1000 | [diff] [blame] | 460 | * Submit the bio for an ioend. We are passed an ioend with a bio attached to |
| 461 | * it, and we submit that bio. The ioend may be used for multiple bio |
| 462 | * submissions, so we only want to allocate an append transaction for the ioend |
| 463 | * once. In the case of multiple bio submission, each bio will take an IO |
| 464 | * reference to the ioend to ensure that the ioend completion is only done once |
| 465 | * all bios have been submitted and the ioend is really done. |
Dave Chinner | 7bf7f35 | 2012-11-12 22:09:45 +1100 | [diff] [blame] | 466 | * |
| 467 | * If @fail is non-zero, it means that we have a situation where some part of |
| 468 | * the submission process has failed after we have marked paged for writeback |
Dave Chinner | bb18782 | 2016-04-06 08:11:25 +1000 | [diff] [blame] | 469 | * and unlocked them. In this situation, we need to fail the bio and ioend |
| 470 | * rather than submit it to IO. This typically only happens on a filesystem |
| 471 | * shutdown. |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 472 | */ |
Dave Chinner | e10de37 | 2016-02-15 17:23:12 +1100 | [diff] [blame] | 473 | STATIC int |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 474 | xfs_submit_ioend( |
Christoph Hellwig | 06342cf | 2009-10-30 09:09:15 +0000 | [diff] [blame] | 475 | struct writeback_control *wbc, |
Christoph Hellwig | 0e51a8e | 2016-04-06 08:34:30 +1000 | [diff] [blame] | 476 | struct xfs_ioend *ioend, |
Dave Chinner | e10de37 | 2016-02-15 17:23:12 +1100 | [diff] [blame] | 477 | int status) |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 478 | { |
Darrick J. Wong | 5eda430 | 2017-02-02 15:14:02 -0800 | [diff] [blame] | 479 | /* Convert CoW extents to regular */ |
| 480 | if (!status && ioend->io_type == XFS_IO_COW) { |
| 481 | status = xfs_reflink_convert_cow(XFS_I(ioend->io_inode), |
| 482 | ioend->io_offset, ioend->io_size); |
| 483 | } |
| 484 | |
Dave Chinner | e10de37 | 2016-02-15 17:23:12 +1100 | [diff] [blame] | 485 | /* Reserve log space if we might write beyond the on-disk inode size. */ |
| 486 | if (!status && |
Christoph Hellwig | 0e51a8e | 2016-04-06 08:34:30 +1000 | [diff] [blame] | 487 | ioend->io_type != XFS_IO_UNWRITTEN && |
Dave Chinner | bb18782 | 2016-04-06 08:11:25 +1000 | [diff] [blame] | 488 | xfs_ioend_is_append(ioend) && |
| 489 | !ioend->io_append_trans) |
Dave Chinner | e10de37 | 2016-02-15 17:23:12 +1100 | [diff] [blame] | 490 | status = xfs_setfilesize_trans_alloc(ioend); |
Dave Chinner | bb18782 | 2016-04-06 08:11:25 +1000 | [diff] [blame] | 491 | |
Christoph Hellwig | 0e51a8e | 2016-04-06 08:34:30 +1000 | [diff] [blame] | 492 | ioend->io_bio->bi_private = ioend; |
| 493 | ioend->io_bio->bi_end_io = xfs_end_bio; |
Jens Axboe | 7637241 | 2016-11-01 10:00:38 -0600 | [diff] [blame] | 494 | ioend->io_bio->bi_opf = REQ_OP_WRITE | wbc_to_write_flags(wbc); |
Christoph Hellwig | 70fd761 | 2016-11-01 07:40:10 -0600 | [diff] [blame] | 495 | |
Dave Chinner | e10de37 | 2016-02-15 17:23:12 +1100 | [diff] [blame] | 496 | /* |
| 497 | * If we are failing the IO now, just mark the ioend with an |
| 498 | * error and finish it. This will run IO completion immediately |
| 499 | * as there is only one reference to the ioend at this point in |
| 500 | * time. |
| 501 | */ |
| 502 | if (status) { |
Christoph Hellwig | 0e51a8e | 2016-04-06 08:34:30 +1000 | [diff] [blame] | 503 | ioend->io_bio->bi_error = status; |
| 504 | bio_endio(ioend->io_bio); |
Dave Chinner | e10de37 | 2016-02-15 17:23:12 +1100 | [diff] [blame] | 505 | return status; |
| 506 | } |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 507 | |
Mike Christie | 4e49ea4 | 2016-06-05 14:31:41 -0500 | [diff] [blame] | 508 | submit_bio(ioend->io_bio); |
Dave Chinner | e10de37 | 2016-02-15 17:23:12 +1100 | [diff] [blame] | 509 | return 0; |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 510 | } |
| 511 | |
Christoph Hellwig | 0e51a8e | 2016-04-06 08:34:30 +1000 | [diff] [blame] | 512 | static void |
| 513 | xfs_init_bio_from_bh( |
| 514 | struct bio *bio, |
| 515 | struct buffer_head *bh) |
| 516 | { |
| 517 | bio->bi_iter.bi_sector = bh->b_blocknr * (bh->b_size >> 9); |
| 518 | bio->bi_bdev = bh->b_bdev; |
| 519 | } |
| 520 | |
| 521 | static struct xfs_ioend * |
| 522 | xfs_alloc_ioend( |
| 523 | struct inode *inode, |
| 524 | unsigned int type, |
| 525 | xfs_off_t offset, |
| 526 | struct buffer_head *bh) |
| 527 | { |
| 528 | struct xfs_ioend *ioend; |
| 529 | struct bio *bio; |
| 530 | |
| 531 | bio = bio_alloc_bioset(GFP_NOFS, BIO_MAX_PAGES, xfs_ioend_bioset); |
| 532 | xfs_init_bio_from_bh(bio, bh); |
| 533 | |
| 534 | ioend = container_of(bio, struct xfs_ioend, io_inline_bio); |
| 535 | INIT_LIST_HEAD(&ioend->io_list); |
| 536 | ioend->io_type = type; |
| 537 | ioend->io_inode = inode; |
| 538 | ioend->io_size = 0; |
| 539 | ioend->io_offset = offset; |
| 540 | INIT_WORK(&ioend->io_work, xfs_end_io); |
| 541 | ioend->io_append_trans = NULL; |
| 542 | ioend->io_bio = bio; |
| 543 | return ioend; |
| 544 | } |
| 545 | |
| 546 | /* |
| 547 | * Allocate a new bio, and chain the old bio to the new one. |
| 548 | * |
| 549 | * Note that we have to do perform the chaining in this unintuitive order |
| 550 | * so that the bi_private linkage is set up in the right direction for the |
| 551 | * traversal in xfs_destroy_ioend(). |
| 552 | */ |
| 553 | static void |
| 554 | xfs_chain_bio( |
| 555 | struct xfs_ioend *ioend, |
| 556 | struct writeback_control *wbc, |
| 557 | struct buffer_head *bh) |
| 558 | { |
| 559 | struct bio *new; |
| 560 | |
| 561 | new = bio_alloc(GFP_NOFS, BIO_MAX_PAGES); |
| 562 | xfs_init_bio_from_bh(new, bh); |
| 563 | |
| 564 | bio_chain(ioend->io_bio, new); |
| 565 | bio_get(ioend->io_bio); /* for xfs_destroy_ioend */ |
Jens Axboe | 7637241 | 2016-11-01 10:00:38 -0600 | [diff] [blame] | 566 | ioend->io_bio->bi_opf = REQ_OP_WRITE | wbc_to_write_flags(wbc); |
Mike Christie | 4e49ea4 | 2016-06-05 14:31:41 -0500 | [diff] [blame] | 567 | submit_bio(ioend->io_bio); |
Christoph Hellwig | 0e51a8e | 2016-04-06 08:34:30 +1000 | [diff] [blame] | 568 | ioend->io_bio = new; |
| 569 | } |
| 570 | |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 571 | /* |
| 572 | * Test to see if we've been building up a completion structure for |
| 573 | * earlier buffers -- if so, we try to append to this ioend if we |
| 574 | * can, otherwise we finish off any current ioend and start another. |
Dave Chinner | e10de37 | 2016-02-15 17:23:12 +1100 | [diff] [blame] | 575 | * Return the ioend we finished off so that the caller can submit it |
| 576 | * once it has finished processing the dirty page. |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 577 | */ |
| 578 | STATIC void |
| 579 | xfs_add_to_ioend( |
| 580 | struct inode *inode, |
| 581 | struct buffer_head *bh, |
Christoph Hellwig | 7336cea | 2006-01-11 20:49:16 +1100 | [diff] [blame] | 582 | xfs_off_t offset, |
Dave Chinner | e10de37 | 2016-02-15 17:23:12 +1100 | [diff] [blame] | 583 | struct xfs_writepage_ctx *wpc, |
Dave Chinner | bb18782 | 2016-04-06 08:11:25 +1000 | [diff] [blame] | 584 | struct writeback_control *wbc, |
Dave Chinner | e10de37 | 2016-02-15 17:23:12 +1100 | [diff] [blame] | 585 | struct list_head *iolist) |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 586 | { |
Dave Chinner | fbcc025 | 2016-02-15 17:21:19 +1100 | [diff] [blame] | 587 | if (!wpc->ioend || wpc->io_type != wpc->ioend->io_type || |
Darrick J. Wong | 0df61da | 2016-03-07 09:32:14 +1100 | [diff] [blame] | 588 | bh->b_blocknr != wpc->last_block + 1 || |
| 589 | offset != wpc->ioend->io_offset + wpc->ioend->io_size) { |
Dave Chinner | e10de37 | 2016-02-15 17:23:12 +1100 | [diff] [blame] | 590 | if (wpc->ioend) |
| 591 | list_add(&wpc->ioend->io_list, iolist); |
Christoph Hellwig | 0e51a8e | 2016-04-06 08:34:30 +1000 | [diff] [blame] | 592 | wpc->ioend = xfs_alloc_ioend(inode, wpc->io_type, offset, bh); |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 593 | } |
| 594 | |
Christoph Hellwig | 0e51a8e | 2016-04-06 08:34:30 +1000 | [diff] [blame] | 595 | /* |
| 596 | * If the buffer doesn't fit into the bio we need to allocate a new |
| 597 | * one. This shouldn't happen more than once for a given buffer. |
| 598 | */ |
| 599 | while (xfs_bio_add_buffer(wpc->ioend->io_bio, bh) != bh->b_size) |
| 600 | xfs_chain_bio(wpc->ioend, wbc, bh); |
Dave Chinner | bb18782 | 2016-04-06 08:11:25 +1000 | [diff] [blame] | 601 | |
Dave Chinner | fbcc025 | 2016-02-15 17:21:19 +1100 | [diff] [blame] | 602 | wpc->ioend->io_size += bh->b_size; |
| 603 | wpc->last_block = bh->b_blocknr; |
Dave Chinner | e10de37 | 2016-02-15 17:23:12 +1100 | [diff] [blame] | 604 | xfs_start_buffer_writeback(bh); |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 605 | } |
| 606 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 607 | STATIC void |
Nathan Scott | 87cbc49 | 2006-03-14 13:26:43 +1100 | [diff] [blame] | 608 | xfs_map_buffer( |
Christoph Hellwig | 046f168 | 2010-04-28 12:28:52 +0000 | [diff] [blame] | 609 | struct inode *inode, |
Nathan Scott | 87cbc49 | 2006-03-14 13:26:43 +1100 | [diff] [blame] | 610 | struct buffer_head *bh, |
Christoph Hellwig | 207d041 | 2010-04-28 12:28:56 +0000 | [diff] [blame] | 611 | struct xfs_bmbt_irec *imap, |
Christoph Hellwig | 046f168 | 2010-04-28 12:28:52 +0000 | [diff] [blame] | 612 | xfs_off_t offset) |
Nathan Scott | 87cbc49 | 2006-03-14 13:26:43 +1100 | [diff] [blame] | 613 | { |
| 614 | sector_t bn; |
Christoph Hellwig | 8699bb0 | 2010-04-28 12:28:54 +0000 | [diff] [blame] | 615 | struct xfs_mount *m = XFS_I(inode)->i_mount; |
Christoph Hellwig | 207d041 | 2010-04-28 12:28:56 +0000 | [diff] [blame] | 616 | xfs_off_t iomap_offset = XFS_FSB_TO_B(m, imap->br_startoff); |
| 617 | xfs_daddr_t iomap_bn = xfs_fsb_to_db(XFS_I(inode), imap->br_startblock); |
Nathan Scott | 87cbc49 | 2006-03-14 13:26:43 +1100 | [diff] [blame] | 618 | |
Christoph Hellwig | 207d041 | 2010-04-28 12:28:56 +0000 | [diff] [blame] | 619 | ASSERT(imap->br_startblock != HOLESTARTBLOCK); |
| 620 | ASSERT(imap->br_startblock != DELAYSTARTBLOCK); |
Nathan Scott | 87cbc49 | 2006-03-14 13:26:43 +1100 | [diff] [blame] | 621 | |
Christoph Hellwig | e513182 | 2010-04-28 12:28:55 +0000 | [diff] [blame] | 622 | bn = (iomap_bn >> (inode->i_blkbits - BBSHIFT)) + |
Christoph Hellwig | 8699bb0 | 2010-04-28 12:28:54 +0000 | [diff] [blame] | 623 | ((offset - iomap_offset) >> inode->i_blkbits); |
Nathan Scott | 87cbc49 | 2006-03-14 13:26:43 +1100 | [diff] [blame] | 624 | |
Christoph Hellwig | 046f168 | 2010-04-28 12:28:52 +0000 | [diff] [blame] | 625 | ASSERT(bn || XFS_IS_REALTIME_INODE(XFS_I(inode))); |
Nathan Scott | 87cbc49 | 2006-03-14 13:26:43 +1100 | [diff] [blame] | 626 | |
| 627 | bh->b_blocknr = bn; |
| 628 | set_buffer_mapped(bh); |
| 629 | } |
| 630 | |
| 631 | STATIC void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 632 | xfs_map_at_offset( |
Christoph Hellwig | 046f168 | 2010-04-28 12:28:52 +0000 | [diff] [blame] | 633 | struct inode *inode, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 634 | struct buffer_head *bh, |
Christoph Hellwig | 207d041 | 2010-04-28 12:28:56 +0000 | [diff] [blame] | 635 | struct xfs_bmbt_irec *imap, |
Christoph Hellwig | 046f168 | 2010-04-28 12:28:52 +0000 | [diff] [blame] | 636 | xfs_off_t offset) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 637 | { |
Christoph Hellwig | 207d041 | 2010-04-28 12:28:56 +0000 | [diff] [blame] | 638 | ASSERT(imap->br_startblock != HOLESTARTBLOCK); |
| 639 | ASSERT(imap->br_startblock != DELAYSTARTBLOCK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 640 | |
Christoph Hellwig | 207d041 | 2010-04-28 12:28:56 +0000 | [diff] [blame] | 641 | xfs_map_buffer(inode, bh, imap, offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 642 | set_buffer_mapped(bh); |
| 643 | clear_buffer_delay(bh); |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 644 | clear_buffer_unwritten(bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 645 | } |
| 646 | |
| 647 | /* |
Dave Chinner | a49935f | 2014-03-07 16:19:14 +1100 | [diff] [blame] | 648 | * Test if a given page contains at least one buffer of a given @type. |
| 649 | * If @check_all_buffers is true, then we walk all the buffers in the page to |
| 650 | * try to find one of the type passed in. If it is not set, then the caller only |
| 651 | * needs to check the first buffer on the page for a match. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 652 | */ |
Dave Chinner | a49935f | 2014-03-07 16:19:14 +1100 | [diff] [blame] | 653 | STATIC bool |
Dave Chinner | 6ffc4db | 2012-04-23 15:58:43 +1000 | [diff] [blame] | 654 | xfs_check_page_type( |
Christoph Hellwig | 10ce444 | 2006-01-11 20:48:14 +1100 | [diff] [blame] | 655 | struct page *page, |
Dave Chinner | a49935f | 2014-03-07 16:19:14 +1100 | [diff] [blame] | 656 | unsigned int type, |
| 657 | bool check_all_buffers) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 658 | { |
Dave Chinner | a49935f | 2014-03-07 16:19:14 +1100 | [diff] [blame] | 659 | struct buffer_head *bh; |
| 660 | struct buffer_head *head; |
| 661 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 662 | if (PageWriteback(page)) |
Dave Chinner | a49935f | 2014-03-07 16:19:14 +1100 | [diff] [blame] | 663 | return false; |
| 664 | if (!page->mapping) |
| 665 | return false; |
| 666 | if (!page_has_buffers(page)) |
| 667 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 668 | |
Dave Chinner | a49935f | 2014-03-07 16:19:14 +1100 | [diff] [blame] | 669 | bh = head = page_buffers(page); |
| 670 | do { |
| 671 | if (buffer_unwritten(bh)) { |
| 672 | if (type == XFS_IO_UNWRITTEN) |
| 673 | return true; |
| 674 | } else if (buffer_delay(bh)) { |
Dan Carpenter | 805eeb8 | 2014-04-04 06:56:30 +1100 | [diff] [blame] | 675 | if (type == XFS_IO_DELALLOC) |
Dave Chinner | a49935f | 2014-03-07 16:19:14 +1100 | [diff] [blame] | 676 | return true; |
| 677 | } else if (buffer_dirty(bh) && buffer_mapped(bh)) { |
Dan Carpenter | 805eeb8 | 2014-04-04 06:56:30 +1100 | [diff] [blame] | 678 | if (type == XFS_IO_OVERWRITE) |
Dave Chinner | a49935f | 2014-03-07 16:19:14 +1100 | [diff] [blame] | 679 | return true; |
| 680 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 681 | |
Dave Chinner | a49935f | 2014-03-07 16:19:14 +1100 | [diff] [blame] | 682 | /* If we are only checking the first buffer, we are done now. */ |
| 683 | if (!check_all_buffers) |
| 684 | break; |
| 685 | } while ((bh = bh->b_this_page) != head); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 686 | |
Dave Chinner | a49935f | 2014-03-07 16:19:14 +1100 | [diff] [blame] | 687 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 688 | } |
| 689 | |
Dave Chinner | 3ed3a43 | 2010-03-05 02:00:42 +0000 | [diff] [blame] | 690 | STATIC void |
| 691 | xfs_vm_invalidatepage( |
| 692 | struct page *page, |
Lukas Czerner | d47992f | 2013-05-21 23:17:23 -0400 | [diff] [blame] | 693 | unsigned int offset, |
| 694 | unsigned int length) |
Dave Chinner | 3ed3a43 | 2010-03-05 02:00:42 +0000 | [diff] [blame] | 695 | { |
Lukas Czerner | 34097df | 2013-05-21 23:58:01 -0400 | [diff] [blame] | 696 | trace_xfs_invalidatepage(page->mapping->host, page, offset, |
| 697 | length); |
| 698 | block_invalidatepage(page, offset, length); |
Dave Chinner | 3ed3a43 | 2010-03-05 02:00:42 +0000 | [diff] [blame] | 699 | } |
| 700 | |
| 701 | /* |
| 702 | * If the page has delalloc buffers on it, we need to punch them out before we |
| 703 | * invalidate the page. If we don't, we leave a stale delalloc mapping on the |
| 704 | * inode that can trip a BUG() in xfs_get_blocks() later on if a direct IO read |
| 705 | * is done on that same region - the delalloc extent is returned when none is |
| 706 | * supposed to be there. |
| 707 | * |
| 708 | * We prevent this by truncating away the delalloc regions on the page before |
| 709 | * invalidating it. Because they are delalloc, we can do this without needing a |
| 710 | * transaction. Indeed - if we get ENOSPC errors, we have to be able to do this |
| 711 | * truncation without a transaction as there is no space left for block |
| 712 | * reservation (typically why we see a ENOSPC in writeback). |
| 713 | * |
| 714 | * This is not a performance critical path, so for now just do the punching a |
| 715 | * buffer head at a time. |
| 716 | */ |
| 717 | STATIC void |
| 718 | xfs_aops_discard_page( |
| 719 | struct page *page) |
| 720 | { |
| 721 | struct inode *inode = page->mapping->host; |
| 722 | struct xfs_inode *ip = XFS_I(inode); |
| 723 | struct buffer_head *bh, *head; |
| 724 | loff_t offset = page_offset(page); |
Dave Chinner | 3ed3a43 | 2010-03-05 02:00:42 +0000 | [diff] [blame] | 725 | |
Dave Chinner | a49935f | 2014-03-07 16:19:14 +1100 | [diff] [blame] | 726 | if (!xfs_check_page_type(page, XFS_IO_DELALLOC, true)) |
Dave Chinner | 3ed3a43 | 2010-03-05 02:00:42 +0000 | [diff] [blame] | 727 | goto out_invalidate; |
| 728 | |
Dave Chinner | e8c3753 | 2010-03-15 02:36:35 +0000 | [diff] [blame] | 729 | if (XFS_FORCED_SHUTDOWN(ip->i_mount)) |
| 730 | goto out_invalidate; |
| 731 | |
Dave Chinner | 4f10700 | 2011-03-07 10:00:35 +1100 | [diff] [blame] | 732 | xfs_alert(ip->i_mount, |
Dave Chinner | 3ed3a43 | 2010-03-05 02:00:42 +0000 | [diff] [blame] | 733 | "page discard on page %p, inode 0x%llx, offset %llu.", |
| 734 | page, ip->i_ino, offset); |
| 735 | |
| 736 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
| 737 | bh = head = page_buffers(page); |
| 738 | do { |
Dave Chinner | 3ed3a43 | 2010-03-05 02:00:42 +0000 | [diff] [blame] | 739 | int error; |
Dave Chinner | c726de4 | 2010-11-30 15:14:39 +1100 | [diff] [blame] | 740 | xfs_fileoff_t start_fsb; |
Dave Chinner | 3ed3a43 | 2010-03-05 02:00:42 +0000 | [diff] [blame] | 741 | |
| 742 | if (!buffer_delay(bh)) |
| 743 | goto next_buffer; |
| 744 | |
Dave Chinner | c726de4 | 2010-11-30 15:14:39 +1100 | [diff] [blame] | 745 | start_fsb = XFS_B_TO_FSBT(ip->i_mount, offset); |
| 746 | error = xfs_bmap_punch_delalloc_range(ip, start_fsb, 1); |
Dave Chinner | 3ed3a43 | 2010-03-05 02:00:42 +0000 | [diff] [blame] | 747 | if (error) { |
| 748 | /* something screwed, just bail */ |
Dave Chinner | e8c3753 | 2010-03-15 02:36:35 +0000 | [diff] [blame] | 749 | if (!XFS_FORCED_SHUTDOWN(ip->i_mount)) { |
Dave Chinner | 4f10700 | 2011-03-07 10:00:35 +1100 | [diff] [blame] | 750 | xfs_alert(ip->i_mount, |
Dave Chinner | 3ed3a43 | 2010-03-05 02:00:42 +0000 | [diff] [blame] | 751 | "page discard unable to remove delalloc mapping."); |
Dave Chinner | e8c3753 | 2010-03-15 02:36:35 +0000 | [diff] [blame] | 752 | } |
Dave Chinner | 3ed3a43 | 2010-03-05 02:00:42 +0000 | [diff] [blame] | 753 | break; |
| 754 | } |
| 755 | next_buffer: |
Fabian Frederick | 9340747 | 2017-02-27 14:28:32 -0800 | [diff] [blame] | 756 | offset += i_blocksize(inode); |
Dave Chinner | 3ed3a43 | 2010-03-05 02:00:42 +0000 | [diff] [blame] | 757 | |
| 758 | } while ((bh = bh->b_this_page) != head); |
| 759 | |
| 760 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
| 761 | out_invalidate: |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 762 | xfs_vm_invalidatepage(page, 0, PAGE_SIZE); |
Dave Chinner | 3ed3a43 | 2010-03-05 02:00:42 +0000 | [diff] [blame] | 763 | return; |
| 764 | } |
| 765 | |
Darrick J. Wong | ef47366 | 2016-10-03 09:11:34 -0700 | [diff] [blame] | 766 | static int |
| 767 | xfs_map_cow( |
| 768 | struct xfs_writepage_ctx *wpc, |
| 769 | struct inode *inode, |
| 770 | loff_t offset, |
| 771 | unsigned int *new_type) |
| 772 | { |
| 773 | struct xfs_inode *ip = XFS_I(inode); |
| 774 | struct xfs_bmbt_irec imap; |
Christoph Hellwig | 092d5d9 | 2016-11-24 11:39:49 +1100 | [diff] [blame] | 775 | bool is_cow = false; |
Darrick J. Wong | ef47366 | 2016-10-03 09:11:34 -0700 | [diff] [blame] | 776 | int error; |
| 777 | |
| 778 | /* |
| 779 | * If we already have a valid COW mapping keep using it. |
| 780 | */ |
| 781 | if (wpc->io_type == XFS_IO_COW) { |
| 782 | wpc->imap_valid = xfs_imap_valid(inode, &wpc->imap, offset); |
| 783 | if (wpc->imap_valid) { |
| 784 | *new_type = XFS_IO_COW; |
| 785 | return 0; |
| 786 | } |
| 787 | } |
| 788 | |
| 789 | /* |
| 790 | * Else we need to check if there is a COW mapping at this offset. |
| 791 | */ |
| 792 | xfs_ilock(ip, XFS_ILOCK_SHARED); |
Christoph Hellwig | 092d5d9 | 2016-11-24 11:39:49 +1100 | [diff] [blame] | 793 | is_cow = xfs_reflink_find_cow_mapping(ip, offset, &imap); |
Darrick J. Wong | ef47366 | 2016-10-03 09:11:34 -0700 | [diff] [blame] | 794 | xfs_iunlock(ip, XFS_ILOCK_SHARED); |
| 795 | |
| 796 | if (!is_cow) |
| 797 | return 0; |
| 798 | |
| 799 | /* |
| 800 | * And if the COW mapping has a delayed extent here we need to |
| 801 | * allocate real space for it now. |
| 802 | */ |
Christoph Hellwig | 092d5d9 | 2016-11-24 11:39:49 +1100 | [diff] [blame] | 803 | if (isnullstartblock(imap.br_startblock)) { |
Darrick J. Wong | ef47366 | 2016-10-03 09:11:34 -0700 | [diff] [blame] | 804 | error = xfs_iomap_write_allocate(ip, XFS_COW_FORK, offset, |
| 805 | &imap); |
| 806 | if (error) |
| 807 | return error; |
| 808 | } |
| 809 | |
| 810 | wpc->io_type = *new_type = XFS_IO_COW; |
| 811 | wpc->imap_valid = true; |
| 812 | wpc->imap = imap; |
| 813 | return 0; |
| 814 | } |
| 815 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 816 | /* |
Dave Chinner | e10de37 | 2016-02-15 17:23:12 +1100 | [diff] [blame] | 817 | * We implement an immediate ioend submission policy here to avoid needing to |
| 818 | * chain multiple ioends and hence nest mempool allocations which can violate |
| 819 | * forward progress guarantees we need to provide. The current ioend we are |
| 820 | * adding buffers to is cached on the writepage context, and if the new buffer |
| 821 | * does not append to the cached ioend it will create a new ioend and cache that |
| 822 | * instead. |
| 823 | * |
| 824 | * If a new ioend is created and cached, the old ioend is returned and queued |
| 825 | * locally for submission once the entire page is processed or an error has been |
| 826 | * detected. While ioends are submitted immediately after they are completed, |
| 827 | * batching optimisations are provided by higher level block plugging. |
| 828 | * |
| 829 | * At the end of a writeback pass, there will be a cached ioend remaining on the |
| 830 | * writepage context that the caller will need to submit. |
| 831 | */ |
Dave Chinner | bfce7d2 | 2016-02-15 17:21:37 +1100 | [diff] [blame] | 832 | static int |
| 833 | xfs_writepage_map( |
| 834 | struct xfs_writepage_ctx *wpc, |
Dave Chinner | e10de37 | 2016-02-15 17:23:12 +1100 | [diff] [blame] | 835 | struct writeback_control *wbc, |
Dave Chinner | bfce7d2 | 2016-02-15 17:21:37 +1100 | [diff] [blame] | 836 | struct inode *inode, |
| 837 | struct page *page, |
| 838 | loff_t offset, |
| 839 | __uint64_t end_offset) |
| 840 | { |
Dave Chinner | e10de37 | 2016-02-15 17:23:12 +1100 | [diff] [blame] | 841 | LIST_HEAD(submit_list); |
| 842 | struct xfs_ioend *ioend, *next; |
Dave Chinner | bfce7d2 | 2016-02-15 17:21:37 +1100 | [diff] [blame] | 843 | struct buffer_head *bh, *head; |
Fabian Frederick | 9340747 | 2017-02-27 14:28:32 -0800 | [diff] [blame] | 844 | ssize_t len = i_blocksize(inode); |
Dave Chinner | bfce7d2 | 2016-02-15 17:21:37 +1100 | [diff] [blame] | 845 | int error = 0; |
Dave Chinner | bfce7d2 | 2016-02-15 17:21:37 +1100 | [diff] [blame] | 846 | int count = 0; |
Dave Chinner | e10de37 | 2016-02-15 17:23:12 +1100 | [diff] [blame] | 847 | int uptodate = 1; |
Darrick J. Wong | ef47366 | 2016-10-03 09:11:34 -0700 | [diff] [blame] | 848 | unsigned int new_type; |
Dave Chinner | bfce7d2 | 2016-02-15 17:21:37 +1100 | [diff] [blame] | 849 | |
| 850 | bh = head = page_buffers(page); |
| 851 | offset = page_offset(page); |
Dave Chinner | bfce7d2 | 2016-02-15 17:21:37 +1100 | [diff] [blame] | 852 | do { |
| 853 | if (offset >= end_offset) |
| 854 | break; |
| 855 | if (!buffer_uptodate(bh)) |
| 856 | uptodate = 0; |
| 857 | |
| 858 | /* |
| 859 | * set_page_dirty dirties all buffers in a page, independent |
| 860 | * of their state. The dirty state however is entirely |
| 861 | * meaningless for holes (!mapped && uptodate), so skip |
| 862 | * buffers covering holes here. |
| 863 | */ |
| 864 | if (!buffer_mapped(bh) && buffer_uptodate(bh)) { |
| 865 | wpc->imap_valid = false; |
| 866 | continue; |
| 867 | } |
| 868 | |
Darrick J. Wong | ef47366 | 2016-10-03 09:11:34 -0700 | [diff] [blame] | 869 | if (buffer_unwritten(bh)) |
| 870 | new_type = XFS_IO_UNWRITTEN; |
| 871 | else if (buffer_delay(bh)) |
| 872 | new_type = XFS_IO_DELALLOC; |
| 873 | else if (buffer_uptodate(bh)) |
| 874 | new_type = XFS_IO_OVERWRITE; |
| 875 | else { |
Dave Chinner | bfce7d2 | 2016-02-15 17:21:37 +1100 | [diff] [blame] | 876 | if (PageUptodate(page)) |
| 877 | ASSERT(buffer_mapped(bh)); |
| 878 | /* |
| 879 | * This buffer is not uptodate and will not be |
| 880 | * written to disk. Ensure that we will put any |
| 881 | * subsequent writeable buffers into a new |
| 882 | * ioend. |
| 883 | */ |
| 884 | wpc->imap_valid = false; |
| 885 | continue; |
| 886 | } |
| 887 | |
Darrick J. Wong | ef47366 | 2016-10-03 09:11:34 -0700 | [diff] [blame] | 888 | if (xfs_is_reflink_inode(XFS_I(inode))) { |
| 889 | error = xfs_map_cow(wpc, inode, offset, &new_type); |
| 890 | if (error) |
| 891 | goto out; |
| 892 | } |
| 893 | |
| 894 | if (wpc->io_type != new_type) { |
| 895 | wpc->io_type = new_type; |
| 896 | wpc->imap_valid = false; |
| 897 | } |
| 898 | |
Dave Chinner | bfce7d2 | 2016-02-15 17:21:37 +1100 | [diff] [blame] | 899 | if (wpc->imap_valid) |
| 900 | wpc->imap_valid = xfs_imap_valid(inode, &wpc->imap, |
| 901 | offset); |
| 902 | if (!wpc->imap_valid) { |
| 903 | error = xfs_map_blocks(inode, offset, &wpc->imap, |
| 904 | wpc->io_type); |
| 905 | if (error) |
Dave Chinner | e10de37 | 2016-02-15 17:23:12 +1100 | [diff] [blame] | 906 | goto out; |
Dave Chinner | bfce7d2 | 2016-02-15 17:21:37 +1100 | [diff] [blame] | 907 | wpc->imap_valid = xfs_imap_valid(inode, &wpc->imap, |
| 908 | offset); |
| 909 | } |
| 910 | if (wpc->imap_valid) { |
| 911 | lock_buffer(bh); |
| 912 | if (wpc->io_type != XFS_IO_OVERWRITE) |
| 913 | xfs_map_at_offset(inode, bh, &wpc->imap, offset); |
Dave Chinner | bb18782 | 2016-04-06 08:11:25 +1000 | [diff] [blame] | 914 | xfs_add_to_ioend(inode, bh, offset, wpc, wbc, &submit_list); |
Dave Chinner | bfce7d2 | 2016-02-15 17:21:37 +1100 | [diff] [blame] | 915 | count++; |
| 916 | } |
| 917 | |
Dave Chinner | bfce7d2 | 2016-02-15 17:21:37 +1100 | [diff] [blame] | 918 | } while (offset += len, ((bh = bh->b_this_page) != head)); |
| 919 | |
| 920 | if (uptodate && bh == head) |
| 921 | SetPageUptodate(page); |
| 922 | |
Dave Chinner | e10de37 | 2016-02-15 17:23:12 +1100 | [diff] [blame] | 923 | ASSERT(wpc->ioend || list_empty(&submit_list)); |
Dave Chinner | bfce7d2 | 2016-02-15 17:21:37 +1100 | [diff] [blame] | 924 | |
Dave Chinner | e10de37 | 2016-02-15 17:23:12 +1100 | [diff] [blame] | 925 | out: |
Dave Chinner | bfce7d2 | 2016-02-15 17:21:37 +1100 | [diff] [blame] | 926 | /* |
Dave Chinner | e10de37 | 2016-02-15 17:23:12 +1100 | [diff] [blame] | 927 | * On error, we have to fail the ioend here because we have locked |
| 928 | * buffers in the ioend. If we don't do this, we'll deadlock |
| 929 | * invalidating the page as that tries to lock the buffers on the page. |
| 930 | * Also, because we may have set pages under writeback, we have to make |
| 931 | * sure we run IO completion to mark the error state of the IO |
| 932 | * appropriately, so we can't cancel the ioend directly here. That means |
| 933 | * we have to mark this page as under writeback if we included any |
| 934 | * buffers from it in the ioend chain so that completion treats it |
| 935 | * correctly. |
Dave Chinner | bfce7d2 | 2016-02-15 17:21:37 +1100 | [diff] [blame] | 936 | * |
Dave Chinner | e10de37 | 2016-02-15 17:23:12 +1100 | [diff] [blame] | 937 | * If we didn't include the page in the ioend, the on error we can |
| 938 | * simply discard and unlock it as there are no other users of the page |
| 939 | * or it's buffers right now. The caller will still need to trigger |
| 940 | * submission of outstanding ioends on the writepage context so they are |
| 941 | * treated correctly on error. |
Dave Chinner | bfce7d2 | 2016-02-15 17:21:37 +1100 | [diff] [blame] | 942 | */ |
Dave Chinner | e10de37 | 2016-02-15 17:23:12 +1100 | [diff] [blame] | 943 | if (count) { |
| 944 | xfs_start_page_writeback(page, !error); |
| 945 | |
| 946 | /* |
| 947 | * Preserve the original error if there was one, otherwise catch |
| 948 | * submission errors here and propagate into subsequent ioend |
| 949 | * submissions. |
| 950 | */ |
| 951 | list_for_each_entry_safe(ioend, next, &submit_list, io_list) { |
| 952 | int error2; |
| 953 | |
| 954 | list_del_init(&ioend->io_list); |
| 955 | error2 = xfs_submit_ioend(wbc, ioend, error); |
| 956 | if (error2 && !error) |
| 957 | error = error2; |
| 958 | } |
| 959 | } else if (error) { |
Dave Chinner | bfce7d2 | 2016-02-15 17:21:37 +1100 | [diff] [blame] | 960 | xfs_aops_discard_page(page); |
| 961 | ClearPageUptodate(page); |
| 962 | unlock_page(page); |
Dave Chinner | e10de37 | 2016-02-15 17:23:12 +1100 | [diff] [blame] | 963 | } else { |
| 964 | /* |
| 965 | * We can end up here with no error and nothing to write if we |
| 966 | * race with a partial page truncate on a sub-page block sized |
| 967 | * filesystem. In that case we need to mark the page clean. |
| 968 | */ |
| 969 | xfs_start_page_writeback(page, 1); |
| 970 | end_page_writeback(page); |
Dave Chinner | bfce7d2 | 2016-02-15 17:21:37 +1100 | [diff] [blame] | 971 | } |
Dave Chinner | e10de37 | 2016-02-15 17:23:12 +1100 | [diff] [blame] | 972 | |
Dave Chinner | bfce7d2 | 2016-02-15 17:21:37 +1100 | [diff] [blame] | 973 | mapping_set_error(page->mapping, error); |
| 974 | return error; |
| 975 | } |
| 976 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 977 | /* |
Christoph Hellwig | 89f3b363 | 2010-06-24 09:45:48 +1000 | [diff] [blame] | 978 | * Write out a dirty page. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 979 | * |
Christoph Hellwig | 89f3b363 | 2010-06-24 09:45:48 +1000 | [diff] [blame] | 980 | * For delalloc space on the page we need to allocate space and flush it. |
| 981 | * For unwritten space on the page we need to start the conversion to |
| 982 | * regular allocated space. |
Christoph Hellwig | 89f3b363 | 2010-06-24 09:45:48 +1000 | [diff] [blame] | 983 | * For any other dirty buffer heads on the page we should flush them. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 984 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 985 | STATIC int |
Dave Chinner | fbcc025 | 2016-02-15 17:21:19 +1100 | [diff] [blame] | 986 | xfs_do_writepage( |
Christoph Hellwig | 89f3b363 | 2010-06-24 09:45:48 +1000 | [diff] [blame] | 987 | struct page *page, |
Dave Chinner | fbcc025 | 2016-02-15 17:21:19 +1100 | [diff] [blame] | 988 | struct writeback_control *wbc, |
| 989 | void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 990 | { |
Dave Chinner | fbcc025 | 2016-02-15 17:21:19 +1100 | [diff] [blame] | 991 | struct xfs_writepage_ctx *wpc = data; |
Christoph Hellwig | 89f3b363 | 2010-06-24 09:45:48 +1000 | [diff] [blame] | 992 | struct inode *inode = page->mapping->host; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 993 | loff_t offset; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 994 | __uint64_t end_offset; |
Dave Chinner | ad68972 | 2016-02-15 17:21:31 +1100 | [diff] [blame] | 995 | pgoff_t end_index; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 996 | |
Lukas Czerner | 34097df | 2013-05-21 23:58:01 -0400 | [diff] [blame] | 997 | trace_xfs_writepage(inode, page, 0, 0); |
Christoph Hellwig | 89f3b363 | 2010-06-24 09:45:48 +1000 | [diff] [blame] | 998 | |
Christoph Hellwig | 20cb52e | 2010-06-24 09:46:01 +1000 | [diff] [blame] | 999 | ASSERT(page_has_buffers(page)); |
| 1000 | |
Christoph Hellwig | 89f3b363 | 2010-06-24 09:45:48 +1000 | [diff] [blame] | 1001 | /* |
| 1002 | * Refuse to write the page out if we are called from reclaim context. |
| 1003 | * |
Christoph Hellwig | d4f7a5c | 2010-06-28 10:34:44 -0400 | [diff] [blame] | 1004 | * This avoids stack overflows when called from deeply used stacks in |
| 1005 | * random callers for direct reclaim or memcg reclaim. We explicitly |
| 1006 | * allow reclaim from kswapd as the stack usage there is relatively low. |
Christoph Hellwig | 89f3b363 | 2010-06-24 09:45:48 +1000 | [diff] [blame] | 1007 | * |
Mel Gorman | 94054fa | 2011-10-31 17:07:45 -0700 | [diff] [blame] | 1008 | * This should never happen except in the case of a VM regression so |
| 1009 | * warn about it. |
Christoph Hellwig | 89f3b363 | 2010-06-24 09:45:48 +1000 | [diff] [blame] | 1010 | */ |
Mel Gorman | 94054fa | 2011-10-31 17:07:45 -0700 | [diff] [blame] | 1011 | if (WARN_ON_ONCE((current->flags & (PF_MEMALLOC|PF_KSWAPD)) == |
| 1012 | PF_MEMALLOC)) |
Christoph Hellwig | b5420f2 | 2010-08-24 11:47:51 +1000 | [diff] [blame] | 1013 | goto redirty; |
Christoph Hellwig | 89f3b363 | 2010-06-24 09:45:48 +1000 | [diff] [blame] | 1014 | |
| 1015 | /* |
Christoph Hellwig | 680a647 | 2011-07-08 14:34:05 +0200 | [diff] [blame] | 1016 | * Given that we do not allow direct reclaim to call us, we should |
| 1017 | * never be called while in a filesystem transaction. |
Christoph Hellwig | 89f3b363 | 2010-06-24 09:45:48 +1000 | [diff] [blame] | 1018 | */ |
Michal Hocko | 9070733 | 2017-05-03 14:53:12 -0700 | [diff] [blame] | 1019 | if (WARN_ON_ONCE(current->flags & PF_MEMALLOC_NOFS)) |
Christoph Hellwig | b5420f2 | 2010-08-24 11:47:51 +1000 | [diff] [blame] | 1020 | goto redirty; |
Christoph Hellwig | 89f3b363 | 2010-06-24 09:45:48 +1000 | [diff] [blame] | 1021 | |
Jie Liu | 8695d27 | 2014-05-20 08:24:26 +1000 | [diff] [blame] | 1022 | /* |
Dave Chinner | ad68972 | 2016-02-15 17:21:31 +1100 | [diff] [blame] | 1023 | * Is this page beyond the end of the file? |
| 1024 | * |
Jie Liu | 8695d27 | 2014-05-20 08:24:26 +1000 | [diff] [blame] | 1025 | * The page index is less than the end_index, adjust the end_offset |
| 1026 | * to the highest offset that this page should represent. |
| 1027 | * ----------------------------------------------------- |
| 1028 | * | file mapping | <EOF> | |
| 1029 | * ----------------------------------------------------- |
| 1030 | * | Page ... | Page N-2 | Page N-1 | Page N | | |
| 1031 | * ^--------------------------------^----------|-------- |
| 1032 | * | desired writeback range | see else | |
| 1033 | * ---------------------------------^------------------| |
| 1034 | */ |
Dave Chinner | ad68972 | 2016-02-15 17:21:31 +1100 | [diff] [blame] | 1035 | offset = i_size_read(inode); |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 1036 | end_index = offset >> PAGE_SHIFT; |
Jie Liu | 8695d27 | 2014-05-20 08:24:26 +1000 | [diff] [blame] | 1037 | if (page->index < end_index) |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 1038 | end_offset = (xfs_off_t)(page->index + 1) << PAGE_SHIFT; |
Jie Liu | 8695d27 | 2014-05-20 08:24:26 +1000 | [diff] [blame] | 1039 | else { |
| 1040 | /* |
| 1041 | * Check whether the page to write out is beyond or straddles |
| 1042 | * i_size or not. |
| 1043 | * ------------------------------------------------------- |
| 1044 | * | file mapping | <EOF> | |
| 1045 | * ------------------------------------------------------- |
| 1046 | * | Page ... | Page N-2 | Page N-1 | Page N | Beyond | |
| 1047 | * ^--------------------------------^-----------|--------- |
| 1048 | * | | Straddles | |
| 1049 | * ---------------------------------^-----------|--------| |
| 1050 | */ |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 1051 | unsigned offset_into_page = offset & (PAGE_SIZE - 1); |
Christoph Hellwig | 6b7a03f | 2012-07-03 12:20:00 -0400 | [diff] [blame] | 1052 | |
| 1053 | /* |
Jan Kara | ff9a28f | 2013-03-14 14:30:54 +0100 | [diff] [blame] | 1054 | * Skip the page if it is fully outside i_size, e.g. due to a |
| 1055 | * truncate operation that is in progress. We must redirty the |
| 1056 | * page so that reclaim stops reclaiming it. Otherwise |
| 1057 | * xfs_vm_releasepage() is called on it and gets confused. |
Jie Liu | 8695d27 | 2014-05-20 08:24:26 +1000 | [diff] [blame] | 1058 | * |
| 1059 | * Note that the end_index is unsigned long, it would overflow |
| 1060 | * if the given offset is greater than 16TB on 32-bit system |
| 1061 | * and if we do check the page is fully outside i_size or not |
| 1062 | * via "if (page->index >= end_index + 1)" as "end_index + 1" |
| 1063 | * will be evaluated to 0. Hence this page will be redirtied |
| 1064 | * and be written out repeatedly which would result in an |
| 1065 | * infinite loop, the user program that perform this operation |
| 1066 | * will hang. Instead, we can verify this situation by checking |
| 1067 | * if the page to write is totally beyond the i_size or if it's |
| 1068 | * offset is just equal to the EOF. |
Christoph Hellwig | 6b7a03f | 2012-07-03 12:20:00 -0400 | [diff] [blame] | 1069 | */ |
Jie Liu | 8695d27 | 2014-05-20 08:24:26 +1000 | [diff] [blame] | 1070 | if (page->index > end_index || |
| 1071 | (page->index == end_index && offset_into_page == 0)) |
Jan Kara | ff9a28f | 2013-03-14 14:30:54 +0100 | [diff] [blame] | 1072 | goto redirty; |
Christoph Hellwig | 6b7a03f | 2012-07-03 12:20:00 -0400 | [diff] [blame] | 1073 | |
| 1074 | /* |
| 1075 | * The page straddles i_size. It must be zeroed out on each |
| 1076 | * and every writepage invocation because it may be mmapped. |
| 1077 | * "A file is mapped in multiples of the page size. For a file |
Jie Liu | 8695d27 | 2014-05-20 08:24:26 +1000 | [diff] [blame] | 1078 | * that is not a multiple of the page size, the remaining |
Christoph Hellwig | 6b7a03f | 2012-07-03 12:20:00 -0400 | [diff] [blame] | 1079 | * memory is zeroed when mapped, and writes to that region are |
| 1080 | * not written out to the file." |
| 1081 | */ |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 1082 | zero_user_segment(page, offset_into_page, PAGE_SIZE); |
Jie Liu | 8695d27 | 2014-05-20 08:24:26 +1000 | [diff] [blame] | 1083 | |
| 1084 | /* Adjust the end_offset to the end of file */ |
| 1085 | end_offset = offset; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1086 | } |
| 1087 | |
Dave Chinner | e10de37 | 2016-02-15 17:23:12 +1100 | [diff] [blame] | 1088 | return xfs_writepage_map(wpc, wbc, inode, page, offset, end_offset); |
Nathan Scott | f51623b | 2006-03-14 13:26:27 +1100 | [diff] [blame] | 1089 | |
Christoph Hellwig | b5420f2 | 2010-08-24 11:47:51 +1000 | [diff] [blame] | 1090 | redirty: |
Nathan Scott | f51623b | 2006-03-14 13:26:27 +1100 | [diff] [blame] | 1091 | redirty_page_for_writepage(wbc, page); |
| 1092 | unlock_page(page); |
| 1093 | return 0; |
Nathan Scott | f51623b | 2006-03-14 13:26:27 +1100 | [diff] [blame] | 1094 | } |
| 1095 | |
Nathan Scott | 7d4fb40 | 2006-06-09 15:27:16 +1000 | [diff] [blame] | 1096 | STATIC int |
Dave Chinner | fbcc025 | 2016-02-15 17:21:19 +1100 | [diff] [blame] | 1097 | xfs_vm_writepage( |
| 1098 | struct page *page, |
| 1099 | struct writeback_control *wbc) |
| 1100 | { |
| 1101 | struct xfs_writepage_ctx wpc = { |
| 1102 | .io_type = XFS_IO_INVALID, |
| 1103 | }; |
| 1104 | int ret; |
| 1105 | |
| 1106 | ret = xfs_do_writepage(page, wbc, &wpc); |
Dave Chinner | e10de37 | 2016-02-15 17:23:12 +1100 | [diff] [blame] | 1107 | if (wpc.ioend) |
| 1108 | ret = xfs_submit_ioend(wbc, wpc.ioend, ret); |
| 1109 | return ret; |
Dave Chinner | fbcc025 | 2016-02-15 17:21:19 +1100 | [diff] [blame] | 1110 | } |
| 1111 | |
| 1112 | STATIC int |
Nathan Scott | 7d4fb40 | 2006-06-09 15:27:16 +1000 | [diff] [blame] | 1113 | xfs_vm_writepages( |
| 1114 | struct address_space *mapping, |
| 1115 | struct writeback_control *wbc) |
| 1116 | { |
Dave Chinner | fbcc025 | 2016-02-15 17:21:19 +1100 | [diff] [blame] | 1117 | struct xfs_writepage_ctx wpc = { |
| 1118 | .io_type = XFS_IO_INVALID, |
| 1119 | }; |
| 1120 | int ret; |
| 1121 | |
Christoph Hellwig | b3aea4e | 2007-08-29 11:44:37 +1000 | [diff] [blame] | 1122 | xfs_iflags_clear(XFS_I(mapping->host), XFS_ITRUNCATED); |
Ross Zwisler | 7f6d5b5 | 2016-02-26 15:19:55 -0800 | [diff] [blame] | 1123 | if (dax_mapping(mapping)) |
| 1124 | return dax_writeback_mapping_range(mapping, |
| 1125 | xfs_find_bdev_for_inode(mapping->host), wbc); |
| 1126 | |
Dave Chinner | fbcc025 | 2016-02-15 17:21:19 +1100 | [diff] [blame] | 1127 | ret = write_cache_pages(mapping, wbc, xfs_do_writepage, &wpc); |
Dave Chinner | e10de37 | 2016-02-15 17:23:12 +1100 | [diff] [blame] | 1128 | if (wpc.ioend) |
| 1129 | ret = xfs_submit_ioend(wbc, wpc.ioend, ret); |
| 1130 | return ret; |
Nathan Scott | 7d4fb40 | 2006-06-09 15:27:16 +1000 | [diff] [blame] | 1131 | } |
| 1132 | |
Nathan Scott | f51623b | 2006-03-14 13:26:27 +1100 | [diff] [blame] | 1133 | /* |
| 1134 | * Called to move a page into cleanable state - and from there |
Christoph Hellwig | 89f3b363 | 2010-06-24 09:45:48 +1000 | [diff] [blame] | 1135 | * to be released. The page should already be clean. We always |
Nathan Scott | f51623b | 2006-03-14 13:26:27 +1100 | [diff] [blame] | 1136 | * have buffer heads in this call. |
| 1137 | * |
Christoph Hellwig | 89f3b363 | 2010-06-24 09:45:48 +1000 | [diff] [blame] | 1138 | * Returns 1 if the page is ok to release, 0 otherwise. |
Nathan Scott | f51623b | 2006-03-14 13:26:27 +1100 | [diff] [blame] | 1139 | */ |
| 1140 | STATIC int |
Nathan Scott | 238f4c5 | 2006-03-17 17:26:25 +1100 | [diff] [blame] | 1141 | xfs_vm_releasepage( |
Nathan Scott | f51623b | 2006-03-14 13:26:27 +1100 | [diff] [blame] | 1142 | struct page *page, |
| 1143 | gfp_t gfp_mask) |
| 1144 | { |
Christoph Hellwig | 20cb52e | 2010-06-24 09:46:01 +1000 | [diff] [blame] | 1145 | int delalloc, unwritten; |
Nathan Scott | f51623b | 2006-03-14 13:26:27 +1100 | [diff] [blame] | 1146 | |
Lukas Czerner | 34097df | 2013-05-21 23:58:01 -0400 | [diff] [blame] | 1147 | trace_xfs_releasepage(page->mapping->host, page, 0, 0); |
Nathan Scott | 238f4c5 | 2006-03-17 17:26:25 +1100 | [diff] [blame] | 1148 | |
Brian Foster | 99579cc | 2016-07-22 09:50:38 +1000 | [diff] [blame] | 1149 | /* |
| 1150 | * mm accommodates an old ext3 case where clean pages might not have had |
| 1151 | * the dirty bit cleared. Thus, it can send actual dirty pages to |
| 1152 | * ->releasepage() via shrink_active_list(). Conversely, |
| 1153 | * block_invalidatepage() can send pages that are still marked dirty |
| 1154 | * but otherwise have invalidated buffers. |
| 1155 | * |
Jan Kara | 0a417b8 | 2017-01-11 10:20:04 -0800 | [diff] [blame] | 1156 | * We want to release the latter to avoid unnecessary buildup of the |
| 1157 | * LRU, skip the former and warn if we've left any lingering |
| 1158 | * delalloc/unwritten buffers on clean pages. Skip pages with delalloc |
| 1159 | * or unwritten buffers and warn if the page is not dirty. Otherwise |
| 1160 | * try to release the buffers. |
Brian Foster | 99579cc | 2016-07-22 09:50:38 +1000 | [diff] [blame] | 1161 | */ |
Christoph Hellwig | 20cb52e | 2010-06-24 09:46:01 +1000 | [diff] [blame] | 1162 | xfs_count_page_state(page, &delalloc, &unwritten); |
Nathan Scott | f51623b | 2006-03-14 13:26:27 +1100 | [diff] [blame] | 1163 | |
Jan Kara | 0a417b8 | 2017-01-11 10:20:04 -0800 | [diff] [blame] | 1164 | if (delalloc) { |
| 1165 | WARN_ON_ONCE(!PageDirty(page)); |
Christoph Hellwig | 89f3b363 | 2010-06-24 09:45:48 +1000 | [diff] [blame] | 1166 | return 0; |
Jan Kara | 0a417b8 | 2017-01-11 10:20:04 -0800 | [diff] [blame] | 1167 | } |
| 1168 | if (unwritten) { |
| 1169 | WARN_ON_ONCE(!PageDirty(page)); |
Nathan Scott | f51623b | 2006-03-14 13:26:27 +1100 | [diff] [blame] | 1170 | return 0; |
Jan Kara | 0a417b8 | 2017-01-11 10:20:04 -0800 | [diff] [blame] | 1171 | } |
Nathan Scott | f51623b | 2006-03-14 13:26:27 +1100 | [diff] [blame] | 1172 | |
Nathan Scott | f51623b | 2006-03-14 13:26:27 +1100 | [diff] [blame] | 1173 | return try_to_free_buffers(page); |
| 1174 | } |
| 1175 | |
Dave Chinner | a719370 | 2015-04-16 21:57:48 +1000 | [diff] [blame] | 1176 | /* |
Dave Chinner | 1fdca9c | 2015-04-16 21:58:21 +1000 | [diff] [blame] | 1177 | * If this is O_DIRECT or the mpage code calling tell them how large the mapping |
| 1178 | * is, so that we can avoid repeated get_blocks calls. |
| 1179 | * |
| 1180 | * If the mapping spans EOF, then we have to break the mapping up as the mapping |
| 1181 | * for blocks beyond EOF must be marked new so that sub block regions can be |
| 1182 | * correctly zeroed. We can't do this for mappings within EOF unless the mapping |
| 1183 | * was just allocated or is unwritten, otherwise the callers would overwrite |
| 1184 | * existing data with zeros. Hence we have to split the mapping into a range up |
| 1185 | * to and including EOF, and a second mapping for beyond EOF. |
| 1186 | */ |
| 1187 | static void |
| 1188 | xfs_map_trim_size( |
| 1189 | struct inode *inode, |
| 1190 | sector_t iblock, |
| 1191 | struct buffer_head *bh_result, |
| 1192 | struct xfs_bmbt_irec *imap, |
| 1193 | xfs_off_t offset, |
| 1194 | ssize_t size) |
| 1195 | { |
| 1196 | xfs_off_t mapping_size; |
| 1197 | |
| 1198 | mapping_size = imap->br_startoff + imap->br_blockcount - iblock; |
| 1199 | mapping_size <<= inode->i_blkbits; |
| 1200 | |
| 1201 | ASSERT(mapping_size > 0); |
| 1202 | if (mapping_size > size) |
| 1203 | mapping_size = size; |
| 1204 | if (offset < i_size_read(inode) && |
| 1205 | offset + mapping_size >= i_size_read(inode)) { |
| 1206 | /* limit mapping to block that spans EOF */ |
| 1207 | mapping_size = roundup_64(i_size_read(inode) - offset, |
Fabian Frederick | 9340747 | 2017-02-27 14:28:32 -0800 | [diff] [blame] | 1208 | i_blocksize(inode)); |
Dave Chinner | 1fdca9c | 2015-04-16 21:58:21 +1000 | [diff] [blame] | 1209 | } |
| 1210 | if (mapping_size > LONG_MAX) |
| 1211 | mapping_size = LONG_MAX; |
| 1212 | |
| 1213 | bh_result->b_size = mapping_size; |
| 1214 | } |
| 1215 | |
Darrick J. Wong | 0613f16 | 2016-10-03 09:11:37 -0700 | [diff] [blame] | 1216 | static int |
Christoph Hellwig | acdda3a | 2016-11-30 14:37:15 +1100 | [diff] [blame] | 1217 | xfs_get_blocks( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1218 | struct inode *inode, |
| 1219 | sector_t iblock, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1220 | struct buffer_head *bh_result, |
Christoph Hellwig | acdda3a | 2016-11-30 14:37:15 +1100 | [diff] [blame] | 1221 | int create) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1222 | { |
Christoph Hellwig | a206c81 | 2010-12-10 08:42:20 +0000 | [diff] [blame] | 1223 | struct xfs_inode *ip = XFS_I(inode); |
| 1224 | struct xfs_mount *mp = ip->i_mount; |
| 1225 | xfs_fileoff_t offset_fsb, end_fsb; |
| 1226 | int error = 0; |
| 1227 | int lockmode = 0; |
Christoph Hellwig | 207d041 | 2010-04-28 12:28:56 +0000 | [diff] [blame] | 1228 | struct xfs_bmbt_irec imap; |
Christoph Hellwig | a206c81 | 2010-12-10 08:42:20 +0000 | [diff] [blame] | 1229 | int nimaps = 1; |
Nathan Scott | fdc7ed7 | 2005-11-02 15:13:13 +1100 | [diff] [blame] | 1230 | xfs_off_t offset; |
| 1231 | ssize_t size; |
Christoph Hellwig | a206c81 | 2010-12-10 08:42:20 +0000 | [diff] [blame] | 1232 | |
Christoph Hellwig | acdda3a | 2016-11-30 14:37:15 +1100 | [diff] [blame] | 1233 | BUG_ON(create); |
Christoph Hellwig | 6e8a27a | 2016-06-21 09:53:45 +1000 | [diff] [blame] | 1234 | |
Christoph Hellwig | a206c81 | 2010-12-10 08:42:20 +0000 | [diff] [blame] | 1235 | if (XFS_FORCED_SHUTDOWN(mp)) |
Eric Sandeen | b474c7a | 2014-06-22 15:04:54 +1000 | [diff] [blame] | 1236 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1237 | |
Nathan Scott | fdc7ed7 | 2005-11-02 15:13:13 +1100 | [diff] [blame] | 1238 | offset = (xfs_off_t)iblock << inode->i_blkbits; |
Fabian Frederick | 9340747 | 2017-02-27 14:28:32 -0800 | [diff] [blame] | 1239 | ASSERT(bh_result->b_size >= i_blocksize(inode)); |
Nathan Scott | c253666 | 2006-03-29 10:44:40 +1000 | [diff] [blame] | 1240 | size = bh_result->b_size; |
Lachlan McIlroy | 364f358 | 2008-09-17 16:50:14 +1000 | [diff] [blame] | 1241 | |
Christoph Hellwig | acdda3a | 2016-11-30 14:37:15 +1100 | [diff] [blame] | 1242 | if (offset >= i_size_read(inode)) |
Lachlan McIlroy | 364f358 | 2008-09-17 16:50:14 +1000 | [diff] [blame] | 1243 | return 0; |
| 1244 | |
Dave Chinner | 507630b | 2012-03-27 10:34:50 -0400 | [diff] [blame] | 1245 | /* |
| 1246 | * Direct I/O is usually done on preallocated files, so try getting |
Christoph Hellwig | 6e8a27a | 2016-06-21 09:53:45 +1000 | [diff] [blame] | 1247 | * a block mapping without an exclusive lock first. |
Dave Chinner | 507630b | 2012-03-27 10:34:50 -0400 | [diff] [blame] | 1248 | */ |
Christoph Hellwig | 6e8a27a | 2016-06-21 09:53:45 +1000 | [diff] [blame] | 1249 | lockmode = xfs_ilock_data_map_shared(ip); |
Christoph Hellwig | f2bde9b | 2010-06-24 11:44:35 +1000 | [diff] [blame] | 1250 | |
Dave Chinner | d2c2819 | 2012-06-08 15:44:53 +1000 | [diff] [blame] | 1251 | ASSERT(offset <= mp->m_super->s_maxbytes); |
| 1252 | if (offset + size > mp->m_super->s_maxbytes) |
| 1253 | size = mp->m_super->s_maxbytes - offset; |
Christoph Hellwig | a206c81 | 2010-12-10 08:42:20 +0000 | [diff] [blame] | 1254 | end_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)offset + size); |
| 1255 | offset_fsb = XFS_B_TO_FSBT(mp, offset); |
| 1256 | |
Christoph Hellwig | acdda3a | 2016-11-30 14:37:15 +1100 | [diff] [blame] | 1257 | error = xfs_bmapi_read(ip, offset_fsb, end_fsb - offset_fsb, |
| 1258 | &imap, &nimaps, XFS_BMAPI_ENTIRE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1259 | if (error) |
Christoph Hellwig | a206c81 | 2010-12-10 08:42:20 +0000 | [diff] [blame] | 1260 | goto out_unlock; |
| 1261 | |
Christoph Hellwig | acdda3a | 2016-11-30 14:37:15 +1100 | [diff] [blame] | 1262 | if (nimaps) { |
Dave Chinner | d5cc2e3 | 2015-04-16 21:59:07 +1000 | [diff] [blame] | 1263 | trace_xfs_get_blocks_found(ip, offset, size, |
Christoph Hellwig | 63fbb4c | 2017-03-28 14:53:36 -0700 | [diff] [blame] | 1264 | imap.br_state == XFS_EXT_UNWRITTEN ? |
| 1265 | XFS_IO_UNWRITTEN : XFS_IO_OVERWRITE, &imap); |
Dave Chinner | 507630b | 2012-03-27 10:34:50 -0400 | [diff] [blame] | 1266 | xfs_iunlock(ip, lockmode); |
Christoph Hellwig | a206c81 | 2010-12-10 08:42:20 +0000 | [diff] [blame] | 1267 | } else { |
| 1268 | trace_xfs_get_blocks_notfound(ip, offset, size); |
| 1269 | goto out_unlock; |
| 1270 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1271 | |
Dave Chinner | 1fdca9c | 2015-04-16 21:58:21 +1000 | [diff] [blame] | 1272 | /* trim mapping down to size requested */ |
Christoph Hellwig | 6e8a27a | 2016-06-21 09:53:45 +1000 | [diff] [blame] | 1273 | xfs_map_trim_size(inode, iblock, bh_result, &imap, offset, size); |
Dave Chinner | 1fdca9c | 2015-04-16 21:58:21 +1000 | [diff] [blame] | 1274 | |
Dave Chinner | a719370 | 2015-04-16 21:57:48 +1000 | [diff] [blame] | 1275 | /* |
| 1276 | * For unwritten extents do not report a disk address in the buffered |
| 1277 | * read case (treat as if we're reading into a hole). |
| 1278 | */ |
Christoph Hellwig | 9c4f29d | 2017-03-28 14:53:35 -0700 | [diff] [blame] | 1279 | if (xfs_bmap_is_real_extent(&imap)) |
Dave Chinner | a719370 | 2015-04-16 21:57:48 +1000 | [diff] [blame] | 1280 | xfs_map_buffer(inode, bh_result, &imap, offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1281 | |
Nathan Scott | c253666 | 2006-03-29 10:44:40 +1000 | [diff] [blame] | 1282 | /* |
| 1283 | * If this is a realtime file, data may be on a different device. |
| 1284 | * to that pointed to from the buffer_head b_bdev currently. |
| 1285 | */ |
Christoph Hellwig | 046f168 | 2010-04-28 12:28:52 +0000 | [diff] [blame] | 1286 | bh_result->b_bdev = xfs_find_bdev_for_inode(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1287 | return 0; |
Christoph Hellwig | a206c81 | 2010-12-10 08:42:20 +0000 | [diff] [blame] | 1288 | |
| 1289 | out_unlock: |
| 1290 | xfs_iunlock(ip, lockmode); |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 1291 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1292 | } |
| 1293 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1294 | STATIC ssize_t |
Nathan Scott | e4c573b | 2006-03-14 13:54:26 +1100 | [diff] [blame] | 1295 | xfs_vm_direct_IO( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1296 | struct kiocb *iocb, |
Christoph Hellwig | c8b8e32 | 2016-04-07 08:51:58 -0700 | [diff] [blame] | 1297 | struct iov_iter *iter) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1298 | { |
Jie Liu | 58e5985 | 2013-07-16 13:11:16 +0800 | [diff] [blame] | 1299 | /* |
Christoph Hellwig | fa8d972 | 2016-07-20 11:38:01 +1000 | [diff] [blame] | 1300 | * We just need the method present so that open/fcntl allow direct I/O. |
Jie Liu | 58e5985 | 2013-07-16 13:11:16 +0800 | [diff] [blame] | 1301 | */ |
Christoph Hellwig | fa8d972 | 2016-07-20 11:38:01 +1000 | [diff] [blame] | 1302 | return -EINVAL; |
Nathan Scott | f51623b | 2006-03-14 13:26:27 +1100 | [diff] [blame] | 1303 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1304 | |
| 1305 | STATIC sector_t |
Nathan Scott | e4c573b | 2006-03-14 13:54:26 +1100 | [diff] [blame] | 1306 | xfs_vm_bmap( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1307 | struct address_space *mapping, |
| 1308 | sector_t block) |
| 1309 | { |
| 1310 | struct inode *inode = (struct inode *)mapping->host; |
Christoph Hellwig | 739bfb2 | 2007-08-29 10:58:01 +1000 | [diff] [blame] | 1311 | struct xfs_inode *ip = XFS_I(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1312 | |
Christoph Hellwig | cca28fb | 2010-06-24 11:57:09 +1000 | [diff] [blame] | 1313 | trace_xfs_vm_bmap(XFS_I(inode)); |
Darrick J. Wong | db1327b | 2016-10-03 09:11:36 -0700 | [diff] [blame] | 1314 | |
| 1315 | /* |
| 1316 | * The swap code (ab-)uses ->bmap to get a block mapping and then |
| 1317 | * bypasseѕ the file system for actual I/O. We really can't allow |
| 1318 | * that on reflinks inodes, so we have to skip out here. And yes, |
| 1319 | * 0 is the magic code for a bmap error.. |
| 1320 | */ |
Christoph Hellwig | 6552321 | 2016-11-30 14:33:25 +1100 | [diff] [blame] | 1321 | if (xfs_is_reflink_inode(ip)) |
Darrick J. Wong | db1327b | 2016-10-03 09:11:36 -0700 | [diff] [blame] | 1322 | return 0; |
Christoph Hellwig | 6552321 | 2016-11-30 14:33:25 +1100 | [diff] [blame] | 1323 | |
Dave Chinner | 4bc1ea6 | 2012-11-12 22:53:56 +1100 | [diff] [blame] | 1324 | filemap_write_and_wait(mapping); |
Nathan Scott | c253666 | 2006-03-29 10:44:40 +1000 | [diff] [blame] | 1325 | return generic_block_bmap(mapping, block, xfs_get_blocks); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1326 | } |
| 1327 | |
| 1328 | STATIC int |
Nathan Scott | e4c573b | 2006-03-14 13:54:26 +1100 | [diff] [blame] | 1329 | xfs_vm_readpage( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1330 | struct file *unused, |
| 1331 | struct page *page) |
| 1332 | { |
Dave Chinner | 121e213 | 2016-01-08 11:28:35 +1100 | [diff] [blame] | 1333 | trace_xfs_vm_readpage(page->mapping->host, 1); |
Nathan Scott | c253666 | 2006-03-29 10:44:40 +1000 | [diff] [blame] | 1334 | return mpage_readpage(page, xfs_get_blocks); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1335 | } |
| 1336 | |
| 1337 | STATIC int |
Nathan Scott | e4c573b | 2006-03-14 13:54:26 +1100 | [diff] [blame] | 1338 | xfs_vm_readpages( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1339 | struct file *unused, |
| 1340 | struct address_space *mapping, |
| 1341 | struct list_head *pages, |
| 1342 | unsigned nr_pages) |
| 1343 | { |
Dave Chinner | 121e213 | 2016-01-08 11:28:35 +1100 | [diff] [blame] | 1344 | trace_xfs_vm_readpages(mapping->host, nr_pages); |
Nathan Scott | c253666 | 2006-03-29 10:44:40 +1000 | [diff] [blame] | 1345 | return mpage_readpages(mapping, pages, nr_pages, xfs_get_blocks); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1346 | } |
| 1347 | |
Dave Chinner | 22e757a | 2014-09-02 12:12:51 +1000 | [diff] [blame] | 1348 | /* |
| 1349 | * This is basically a copy of __set_page_dirty_buffers() with one |
| 1350 | * small tweak: buffers beyond EOF do not get marked dirty. If we mark them |
| 1351 | * dirty, we'll never be able to clean them because we don't write buffers |
| 1352 | * beyond EOF, and that means we can't invalidate pages that span EOF |
| 1353 | * that have been marked dirty. Further, the dirty state can leak into |
| 1354 | * the file interior if the file is extended, resulting in all sorts of |
| 1355 | * bad things happening as the state does not match the underlying data. |
| 1356 | * |
| 1357 | * XXX: this really indicates that bufferheads in XFS need to die. Warts like |
| 1358 | * this only exist because of bufferheads and how the generic code manages them. |
| 1359 | */ |
| 1360 | STATIC int |
| 1361 | xfs_vm_set_page_dirty( |
| 1362 | struct page *page) |
| 1363 | { |
| 1364 | struct address_space *mapping = page->mapping; |
| 1365 | struct inode *inode = mapping->host; |
| 1366 | loff_t end_offset; |
| 1367 | loff_t offset; |
| 1368 | int newly_dirty; |
| 1369 | |
| 1370 | if (unlikely(!mapping)) |
| 1371 | return !TestSetPageDirty(page); |
| 1372 | |
| 1373 | end_offset = i_size_read(inode); |
| 1374 | offset = page_offset(page); |
| 1375 | |
| 1376 | spin_lock(&mapping->private_lock); |
| 1377 | if (page_has_buffers(page)) { |
| 1378 | struct buffer_head *head = page_buffers(page); |
| 1379 | struct buffer_head *bh = head; |
| 1380 | |
| 1381 | do { |
| 1382 | if (offset < end_offset) |
| 1383 | set_buffer_dirty(bh); |
| 1384 | bh = bh->b_this_page; |
Fabian Frederick | 9340747 | 2017-02-27 14:28:32 -0800 | [diff] [blame] | 1385 | offset += i_blocksize(inode); |
Dave Chinner | 22e757a | 2014-09-02 12:12:51 +1000 | [diff] [blame] | 1386 | } while (bh != head); |
| 1387 | } |
Greg Thelen | c4843a7 | 2015-05-22 17:13:16 -0400 | [diff] [blame] | 1388 | /* |
Johannes Weiner | 81f8c3a | 2016-03-15 14:57:04 -0700 | [diff] [blame] | 1389 | * Lock out page->mem_cgroup migration to keep PageDirty |
| 1390 | * synchronized with per-memcg dirty page counters. |
Greg Thelen | c4843a7 | 2015-05-22 17:13:16 -0400 | [diff] [blame] | 1391 | */ |
Johannes Weiner | 62cccb8 | 2016-03-15 14:57:22 -0700 | [diff] [blame] | 1392 | lock_page_memcg(page); |
Dave Chinner | 22e757a | 2014-09-02 12:12:51 +1000 | [diff] [blame] | 1393 | newly_dirty = !TestSetPageDirty(page); |
| 1394 | spin_unlock(&mapping->private_lock); |
| 1395 | |
| 1396 | if (newly_dirty) { |
| 1397 | /* sigh - __set_page_dirty() is static, so copy it here, too */ |
| 1398 | unsigned long flags; |
| 1399 | |
| 1400 | spin_lock_irqsave(&mapping->tree_lock, flags); |
| 1401 | if (page->mapping) { /* Race with truncate? */ |
| 1402 | WARN_ON_ONCE(!PageUptodate(page)); |
Johannes Weiner | 62cccb8 | 2016-03-15 14:57:22 -0700 | [diff] [blame] | 1403 | account_page_dirtied(page, mapping); |
Dave Chinner | 22e757a | 2014-09-02 12:12:51 +1000 | [diff] [blame] | 1404 | radix_tree_tag_set(&mapping->page_tree, |
| 1405 | page_index(page), PAGECACHE_TAG_DIRTY); |
| 1406 | } |
| 1407 | spin_unlock_irqrestore(&mapping->tree_lock, flags); |
Dave Chinner | 22e757a | 2014-09-02 12:12:51 +1000 | [diff] [blame] | 1408 | } |
Johannes Weiner | 62cccb8 | 2016-03-15 14:57:22 -0700 | [diff] [blame] | 1409 | unlock_page_memcg(page); |
Greg Thelen | c4843a7 | 2015-05-22 17:13:16 -0400 | [diff] [blame] | 1410 | if (newly_dirty) |
| 1411 | __mark_inode_dirty(mapping->host, I_DIRTY_PAGES); |
Dave Chinner | 22e757a | 2014-09-02 12:12:51 +1000 | [diff] [blame] | 1412 | return newly_dirty; |
| 1413 | } |
| 1414 | |
Christoph Hellwig | f5e54d6 | 2006-06-28 04:26:44 -0700 | [diff] [blame] | 1415 | const struct address_space_operations xfs_address_space_operations = { |
Nathan Scott | e4c573b | 2006-03-14 13:54:26 +1100 | [diff] [blame] | 1416 | .readpage = xfs_vm_readpage, |
| 1417 | .readpages = xfs_vm_readpages, |
| 1418 | .writepage = xfs_vm_writepage, |
Nathan Scott | 7d4fb40 | 2006-06-09 15:27:16 +1000 | [diff] [blame] | 1419 | .writepages = xfs_vm_writepages, |
Dave Chinner | 22e757a | 2014-09-02 12:12:51 +1000 | [diff] [blame] | 1420 | .set_page_dirty = xfs_vm_set_page_dirty, |
Nathan Scott | 238f4c5 | 2006-03-17 17:26:25 +1100 | [diff] [blame] | 1421 | .releasepage = xfs_vm_releasepage, |
| 1422 | .invalidatepage = xfs_vm_invalidatepage, |
Nathan Scott | e4c573b | 2006-03-14 13:54:26 +1100 | [diff] [blame] | 1423 | .bmap = xfs_vm_bmap, |
| 1424 | .direct_IO = xfs_vm_direct_IO, |
Christoph Lameter | e965f96 | 2006-02-01 03:05:41 -0800 | [diff] [blame] | 1425 | .migratepage = buffer_migrate_page, |
Hisashi Hifumi | bddaafa | 2009-03-29 09:53:38 +0200 | [diff] [blame] | 1426 | .is_partially_uptodate = block_is_partially_uptodate, |
Andi Kleen | aa261f5 | 2009-09-16 11:50:16 +0200 | [diff] [blame] | 1427 | .error_remove_page = generic_error_remove_page, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1428 | }; |