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" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 19 | #include "xfs_bit.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | #include "xfs_log.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 21 | #include "xfs_inum.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | #include "xfs_sb.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 23 | #include "xfs_ag.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #include "xfs_dir2.h" |
| 25 | #include "xfs_trans.h" |
| 26 | #include "xfs_dmapi.h" |
| 27 | #include "xfs_mount.h" |
| 28 | #include "xfs_bmap_btree.h" |
| 29 | #include "xfs_alloc_btree.h" |
| 30 | #include "xfs_ialloc_btree.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | #include "xfs_dir2_sf.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 32 | #include "xfs_attr_sf.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #include "xfs_dinode.h" |
| 34 | #include "xfs_inode.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 35 | #include "xfs_alloc.h" |
| 36 | #include "xfs_btree.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | #include "xfs_error.h" |
| 38 | #include "xfs_rw.h" |
| 39 | #include "xfs_iomap.h" |
Christoph Hellwig | 739bfb2 | 2007-08-29 10:58:01 +1000 | [diff] [blame] | 40 | #include "xfs_vnodeops.h" |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 41 | #include "xfs_trace.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | #include <linux/mpage.h> |
Christoph Hellwig | 10ce444 | 2006-01-11 20:48:14 +1100 | [diff] [blame] | 43 | #include <linux/pagevec.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | #include <linux/writeback.h> |
| 45 | |
Christoph Hellwig | 25e41b3 | 2008-12-03 12:20:39 +0100 | [diff] [blame] | 46 | |
| 47 | /* |
| 48 | * Prime number of hash buckets since address is used as the key. |
| 49 | */ |
| 50 | #define NVSYNC 37 |
| 51 | #define to_ioend_wq(v) (&xfs_ioend_wq[((unsigned long)v) % NVSYNC]) |
| 52 | static wait_queue_head_t xfs_ioend_wq[NVSYNC]; |
| 53 | |
| 54 | void __init |
| 55 | xfs_ioend_init(void) |
| 56 | { |
| 57 | int i; |
| 58 | |
| 59 | for (i = 0; i < NVSYNC; i++) |
| 60 | init_waitqueue_head(&xfs_ioend_wq[i]); |
| 61 | } |
| 62 | |
| 63 | void |
| 64 | xfs_ioend_wait( |
| 65 | xfs_inode_t *ip) |
| 66 | { |
| 67 | wait_queue_head_t *wq = to_ioend_wq(ip); |
| 68 | |
| 69 | wait_event(*wq, (atomic_read(&ip->i_iocount) == 0)); |
| 70 | } |
| 71 | |
| 72 | STATIC void |
| 73 | xfs_ioend_wake( |
| 74 | xfs_inode_t *ip) |
| 75 | { |
| 76 | if (atomic_dec_and_test(&ip->i_iocount)) |
| 77 | wake_up(to_ioend_wq(ip)); |
| 78 | } |
| 79 | |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 80 | void |
Nathan Scott | f51623b | 2006-03-14 13:26:27 +1100 | [diff] [blame] | 81 | xfs_count_page_state( |
| 82 | struct page *page, |
| 83 | int *delalloc, |
| 84 | int *unmapped, |
| 85 | int *unwritten) |
| 86 | { |
| 87 | struct buffer_head *bh, *head; |
| 88 | |
| 89 | *delalloc = *unmapped = *unwritten = 0; |
| 90 | |
| 91 | bh = head = page_buffers(page); |
| 92 | do { |
| 93 | if (buffer_uptodate(bh) && !buffer_mapped(bh)) |
| 94 | (*unmapped) = 1; |
Nathan Scott | f51623b | 2006-03-14 13:26:27 +1100 | [diff] [blame] | 95 | else if (buffer_unwritten(bh)) |
| 96 | (*unwritten) = 1; |
| 97 | else if (buffer_delay(bh)) |
| 98 | (*delalloc) = 1; |
| 99 | } while ((bh = bh->b_this_page) != head); |
| 100 | } |
| 101 | |
Christoph Hellwig | 6214ed4 | 2007-09-14 15:23:17 +1000 | [diff] [blame] | 102 | STATIC struct block_device * |
| 103 | xfs_find_bdev_for_inode( |
| 104 | struct xfs_inode *ip) |
| 105 | { |
| 106 | struct xfs_mount *mp = ip->i_mount; |
| 107 | |
Eric Sandeen | 71ddabb | 2007-11-23 16:29:42 +1100 | [diff] [blame] | 108 | if (XFS_IS_REALTIME_INODE(ip)) |
Christoph Hellwig | 6214ed4 | 2007-09-14 15:23:17 +1000 | [diff] [blame] | 109 | return mp->m_rtdev_targp->bt_bdev; |
| 110 | else |
| 111 | return mp->m_ddev_targp->bt_bdev; |
| 112 | } |
| 113 | |
Christoph Hellwig | 0829c36 | 2005-09-02 16:58:49 +1000 | [diff] [blame] | 114 | /* |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 115 | * We're now finished for good with this ioend structure. |
| 116 | * Update the page state via the associated buffer_heads, |
| 117 | * release holds on the inode and bio, and finally free |
| 118 | * up memory. Do not use the ioend after this. |
| 119 | */ |
Christoph Hellwig | 0829c36 | 2005-09-02 16:58:49 +1000 | [diff] [blame] | 120 | STATIC void |
| 121 | xfs_destroy_ioend( |
| 122 | xfs_ioend_t *ioend) |
| 123 | { |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 124 | struct buffer_head *bh, *next; |
Christoph Hellwig | 583fa58 | 2008-12-03 12:20:38 +0100 | [diff] [blame] | 125 | struct xfs_inode *ip = XFS_I(ioend->io_inode); |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 126 | |
| 127 | for (bh = ioend->io_buffer_head; bh; bh = next) { |
| 128 | next = bh->b_private; |
Nathan Scott | 7d04a33 | 2006-06-09 14:58:38 +1000 | [diff] [blame] | 129 | bh->b_end_io(bh, !ioend->io_error); |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 130 | } |
Christoph Hellwig | 583fa58 | 2008-12-03 12:20:38 +0100 | [diff] [blame] | 131 | |
| 132 | /* |
| 133 | * Volume managers supporting multiple paths can send back ENODEV |
| 134 | * when the final path disappears. In this case continuing to fill |
| 135 | * the page cache with dirty data which cannot be written out is |
| 136 | * evil, so prevent that. |
| 137 | */ |
| 138 | if (unlikely(ioend->io_error == -ENODEV)) { |
| 139 | xfs_do_force_shutdown(ip->i_mount, SHUTDOWN_DEVICE_REQ, |
| 140 | __FILE__, __LINE__); |
Christoph Hellwig | b677c21 | 2007-08-29 11:46:28 +1000 | [diff] [blame] | 141 | } |
Christoph Hellwig | 583fa58 | 2008-12-03 12:20:38 +0100 | [diff] [blame] | 142 | |
Christoph Hellwig | 25e41b3 | 2008-12-03 12:20:39 +0100 | [diff] [blame] | 143 | xfs_ioend_wake(ip); |
Christoph Hellwig | 0829c36 | 2005-09-02 16:58:49 +1000 | [diff] [blame] | 144 | mempool_free(ioend, xfs_ioend_pool); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | } |
| 146 | |
| 147 | /* |
Dave Chinner | 932640e | 2009-10-06 20:29:29 +0000 | [diff] [blame] | 148 | * If the end of the current ioend is beyond the current EOF, |
| 149 | * return the new EOF value, otherwise zero. |
| 150 | */ |
| 151 | STATIC xfs_fsize_t |
| 152 | xfs_ioend_new_eof( |
| 153 | xfs_ioend_t *ioend) |
| 154 | { |
| 155 | xfs_inode_t *ip = XFS_I(ioend->io_inode); |
| 156 | xfs_fsize_t isize; |
| 157 | xfs_fsize_t bsize; |
| 158 | |
| 159 | bsize = ioend->io_offset + ioend->io_size; |
| 160 | isize = MAX(ip->i_size, ip->i_new_size); |
| 161 | isize = MIN(isize, bsize); |
| 162 | return isize > ip->i_d.di_size ? isize : 0; |
| 163 | } |
| 164 | |
| 165 | /* |
Lachlan McIlroy | ba87ea6 | 2007-05-08 13:49:46 +1000 | [diff] [blame] | 166 | * Update on-disk file size now that data has been written to disk. |
| 167 | * The current in-memory file size is i_size. If a write is beyond |
Christoph Hellwig | 613d704 | 2007-10-11 17:44:08 +1000 | [diff] [blame] | 168 | * eof i_new_size will be the intended file size until i_size is |
Lachlan McIlroy | ba87ea6 | 2007-05-08 13:49:46 +1000 | [diff] [blame] | 169 | * updated. If this write does not extend all the way to the valid |
| 170 | * file size then restrict this update to the end of the write. |
| 171 | */ |
Dave Chinner | 932640e | 2009-10-06 20:29:29 +0000 | [diff] [blame] | 172 | |
Lachlan McIlroy | ba87ea6 | 2007-05-08 13:49:46 +1000 | [diff] [blame] | 173 | STATIC void |
| 174 | xfs_setfilesize( |
| 175 | xfs_ioend_t *ioend) |
| 176 | { |
Christoph Hellwig | b677c21 | 2007-08-29 11:46:28 +1000 | [diff] [blame] | 177 | xfs_inode_t *ip = XFS_I(ioend->io_inode); |
Lachlan McIlroy | ba87ea6 | 2007-05-08 13:49:46 +1000 | [diff] [blame] | 178 | xfs_fsize_t isize; |
Lachlan McIlroy | ba87ea6 | 2007-05-08 13:49:46 +1000 | [diff] [blame] | 179 | |
Lachlan McIlroy | ba87ea6 | 2007-05-08 13:49:46 +1000 | [diff] [blame] | 180 | ASSERT((ip->i_d.di_mode & S_IFMT) == S_IFREG); |
| 181 | ASSERT(ioend->io_type != IOMAP_READ); |
| 182 | |
| 183 | if (unlikely(ioend->io_error)) |
| 184 | return; |
| 185 | |
Lachlan McIlroy | ba87ea6 | 2007-05-08 13:49:46 +1000 | [diff] [blame] | 186 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
Dave Chinner | 932640e | 2009-10-06 20:29:29 +0000 | [diff] [blame] | 187 | isize = xfs_ioend_new_eof(ioend); |
| 188 | if (isize) { |
Lachlan McIlroy | ba87ea6 | 2007-05-08 13:49:46 +1000 | [diff] [blame] | 189 | ip->i_d.di_size = isize; |
Christoph Hellwig | 66d834e | 2010-02-15 09:44:49 +0000 | [diff] [blame^] | 190 | xfs_mark_inode_dirty(ip); |
Lachlan McIlroy | ba87ea6 | 2007-05-08 13:49:46 +1000 | [diff] [blame] | 191 | } |
| 192 | |
| 193 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
| 194 | } |
| 195 | |
| 196 | /* |
Christoph Hellwig | 5ec4fab | 2009-10-30 09:11:47 +0000 | [diff] [blame] | 197 | * IO write completion. |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 198 | */ |
| 199 | STATIC void |
Christoph Hellwig | 5ec4fab | 2009-10-30 09:11:47 +0000 | [diff] [blame] | 200 | xfs_end_io( |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 201 | struct work_struct *work) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | { |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 203 | xfs_ioend_t *ioend = |
| 204 | container_of(work, xfs_ioend_t, io_work); |
Christoph Hellwig | 7642861 | 2007-09-14 15:23:31 +1000 | [diff] [blame] | 205 | struct xfs_inode *ip = XFS_I(ioend->io_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | |
Christoph Hellwig | 5ec4fab | 2009-10-30 09:11:47 +0000 | [diff] [blame] | 207 | /* |
| 208 | * For unwritten extents we need to issue transactions to convert a |
| 209 | * range to normal written extens after the data I/O has finished. |
| 210 | */ |
| 211 | if (ioend->io_type == IOMAP_UNWRITTEN && |
| 212 | likely(!ioend->io_error && !XFS_FORCED_SHUTDOWN(ip->i_mount))) { |
| 213 | int error; |
| 214 | |
| 215 | error = xfs_iomap_write_unwritten(ip, ioend->io_offset, |
| 216 | ioend->io_size); |
| 217 | if (error) |
| 218 | ioend->io_error = error; |
Lachlan McIlroy | ba87ea6 | 2007-05-08 13:49:46 +1000 | [diff] [blame] | 219 | } |
Lachlan McIlroy | ba87ea6 | 2007-05-08 13:49:46 +1000 | [diff] [blame] | 220 | |
Christoph Hellwig | 5ec4fab | 2009-10-30 09:11:47 +0000 | [diff] [blame] | 221 | /* |
| 222 | * We might have to update the on-disk file size after extending |
| 223 | * writes. |
| 224 | */ |
| 225 | if (ioend->io_type != IOMAP_READ) |
| 226 | xfs_setfilesize(ioend); |
Christoph Hellwig | 0829c36 | 2005-09-02 16:58:49 +1000 | [diff] [blame] | 227 | xfs_destroy_ioend(ioend); |
| 228 | } |
| 229 | |
| 230 | /* |
Dave Chinner | c626d17 | 2009-04-06 18:42:11 +0200 | [diff] [blame] | 231 | * Schedule IO completion handling on a xfsdatad if this was |
| 232 | * the final hold on this ioend. If we are asked to wait, |
| 233 | * flush the workqueue. |
| 234 | */ |
| 235 | STATIC void |
| 236 | xfs_finish_ioend( |
| 237 | xfs_ioend_t *ioend, |
| 238 | int wait) |
| 239 | { |
| 240 | if (atomic_dec_and_test(&ioend->io_remaining)) { |
Christoph Hellwig | 5ec4fab | 2009-10-30 09:11:47 +0000 | [diff] [blame] | 241 | struct workqueue_struct *wq; |
Dave Chinner | c626d17 | 2009-04-06 18:42:11 +0200 | [diff] [blame] | 242 | |
Christoph Hellwig | 5ec4fab | 2009-10-30 09:11:47 +0000 | [diff] [blame] | 243 | wq = (ioend->io_type == IOMAP_UNWRITTEN) ? |
| 244 | xfsconvertd_workqueue : xfsdatad_workqueue; |
Dave Chinner | c626d17 | 2009-04-06 18:42:11 +0200 | [diff] [blame] | 245 | queue_work(wq, &ioend->io_work); |
| 246 | if (wait) |
| 247 | flush_workqueue(wq); |
| 248 | } |
| 249 | } |
| 250 | |
| 251 | /* |
Christoph Hellwig | 0829c36 | 2005-09-02 16:58:49 +1000 | [diff] [blame] | 252 | * Allocate and initialise an IO completion structure. |
| 253 | * We need to track unwritten extent write completion here initially. |
| 254 | * We'll need to extend this for updating the ondisk inode size later |
| 255 | * (vs. incore size). |
| 256 | */ |
| 257 | STATIC xfs_ioend_t * |
| 258 | xfs_alloc_ioend( |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 259 | struct inode *inode, |
| 260 | unsigned int type) |
Christoph Hellwig | 0829c36 | 2005-09-02 16:58:49 +1000 | [diff] [blame] | 261 | { |
| 262 | xfs_ioend_t *ioend; |
| 263 | |
| 264 | ioend = mempool_alloc(xfs_ioend_pool, GFP_NOFS); |
| 265 | |
| 266 | /* |
| 267 | * Set the count to 1 initially, which will prevent an I/O |
| 268 | * completion callback from happening before we have started |
| 269 | * all the I/O from calling the completion routine too early. |
| 270 | */ |
| 271 | atomic_set(&ioend->io_remaining, 1); |
Nathan Scott | 7d04a33 | 2006-06-09 14:58:38 +1000 | [diff] [blame] | 272 | ioend->io_error = 0; |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 273 | ioend->io_list = NULL; |
| 274 | ioend->io_type = type; |
Christoph Hellwig | b677c21 | 2007-08-29 11:46:28 +1000 | [diff] [blame] | 275 | ioend->io_inode = inode; |
Christoph Hellwig | c1a073b | 2005-09-05 08:23:35 +1000 | [diff] [blame] | 276 | ioend->io_buffer_head = NULL; |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 277 | ioend->io_buffer_tail = NULL; |
Christoph Hellwig | b677c21 | 2007-08-29 11:46:28 +1000 | [diff] [blame] | 278 | atomic_inc(&XFS_I(ioend->io_inode)->i_iocount); |
Christoph Hellwig | 0829c36 | 2005-09-02 16:58:49 +1000 | [diff] [blame] | 279 | ioend->io_offset = 0; |
| 280 | ioend->io_size = 0; |
| 281 | |
Christoph Hellwig | 5ec4fab | 2009-10-30 09:11:47 +0000 | [diff] [blame] | 282 | INIT_WORK(&ioend->io_work, xfs_end_io); |
Christoph Hellwig | 0829c36 | 2005-09-02 16:58:49 +1000 | [diff] [blame] | 283 | return ioend; |
| 284 | } |
| 285 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 286 | STATIC int |
| 287 | xfs_map_blocks( |
| 288 | struct inode *inode, |
| 289 | loff_t offset, |
| 290 | ssize_t count, |
| 291 | xfs_iomap_t *mapp, |
| 292 | int flags) |
| 293 | { |
Christoph Hellwig | 6bd16ff | 2008-12-03 12:20:32 +0100 | [diff] [blame] | 294 | int nmaps = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | |
Christoph Hellwig | 6bd16ff | 2008-12-03 12:20:32 +0100 | [diff] [blame] | 296 | return -xfs_iomap(XFS_I(inode), offset, count, flags, mapp, &nmaps); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | } |
| 298 | |
Christoph Hellwig | b8f82a4 | 2009-11-14 16:17:22 +0000 | [diff] [blame] | 299 | STATIC int |
Christoph Hellwig | 1defeac | 2006-01-11 20:48:33 +1100 | [diff] [blame] | 300 | xfs_iomap_valid( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | xfs_iomap_t *iomapp, |
Christoph Hellwig | 1defeac | 2006-01-11 20:48:33 +1100 | [diff] [blame] | 302 | loff_t offset) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | { |
Christoph Hellwig | 1defeac | 2006-01-11 20:48:33 +1100 | [diff] [blame] | 304 | return offset >= iomapp->iomap_offset && |
| 305 | offset < iomapp->iomap_offset + iomapp->iomap_bsize; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 306 | } |
| 307 | |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 308 | /* |
| 309 | * BIO completion handler for buffered IO. |
| 310 | */ |
Al Viro | 782e3b3 | 2007-10-12 07:17:47 +0100 | [diff] [blame] | 311 | STATIC void |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 312 | xfs_end_bio( |
| 313 | struct bio *bio, |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 314 | int error) |
| 315 | { |
| 316 | xfs_ioend_t *ioend = bio->bi_private; |
| 317 | |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 318 | ASSERT(atomic_read(&bio->bi_cnt) >= 1); |
Nathan Scott | 7d04a33 | 2006-06-09 14:58:38 +1000 | [diff] [blame] | 319 | ioend->io_error = test_bit(BIO_UPTODATE, &bio->bi_flags) ? 0 : error; |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 320 | |
| 321 | /* Toss bio and pass work off to an xfsdatad thread */ |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 322 | bio->bi_private = NULL; |
| 323 | bio->bi_end_io = NULL; |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 324 | bio_put(bio); |
Nathan Scott | 7d04a33 | 2006-06-09 14:58:38 +1000 | [diff] [blame] | 325 | |
David Chinner | e927af9 | 2007-06-05 16:24:36 +1000 | [diff] [blame] | 326 | xfs_finish_ioend(ioend, 0); |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 327 | } |
| 328 | |
| 329 | STATIC void |
| 330 | xfs_submit_ioend_bio( |
Christoph Hellwig | 06342cf | 2009-10-30 09:09:15 +0000 | [diff] [blame] | 331 | struct writeback_control *wbc, |
| 332 | xfs_ioend_t *ioend, |
| 333 | struct bio *bio) |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 334 | { |
| 335 | atomic_inc(&ioend->io_remaining); |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 336 | bio->bi_private = ioend; |
| 337 | bio->bi_end_io = xfs_end_bio; |
| 338 | |
Dave Chinner | 932640e | 2009-10-06 20:29:29 +0000 | [diff] [blame] | 339 | /* |
| 340 | * If the I/O is beyond EOF we mark the inode dirty immediately |
| 341 | * but don't update the inode size until I/O completion. |
| 342 | */ |
| 343 | if (xfs_ioend_new_eof(ioend)) |
Christoph Hellwig | 66d834e | 2010-02-15 09:44:49 +0000 | [diff] [blame^] | 344 | xfs_mark_inode_dirty(XFS_I(ioend->io_inode)); |
Dave Chinner | 932640e | 2009-10-06 20:29:29 +0000 | [diff] [blame] | 345 | |
Christoph Hellwig | 06342cf | 2009-10-30 09:09:15 +0000 | [diff] [blame] | 346 | submit_bio(wbc->sync_mode == WB_SYNC_ALL ? |
| 347 | WRITE_SYNC_PLUG : WRITE, bio); |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 348 | ASSERT(!bio_flagged(bio, BIO_EOPNOTSUPP)); |
| 349 | bio_put(bio); |
| 350 | } |
| 351 | |
| 352 | STATIC struct bio * |
| 353 | xfs_alloc_ioend_bio( |
| 354 | struct buffer_head *bh) |
| 355 | { |
| 356 | struct bio *bio; |
| 357 | int nvecs = bio_get_nr_vecs(bh->b_bdev); |
| 358 | |
| 359 | do { |
| 360 | bio = bio_alloc(GFP_NOIO, nvecs); |
| 361 | nvecs >>= 1; |
| 362 | } while (!bio); |
| 363 | |
| 364 | ASSERT(bio->bi_private == NULL); |
| 365 | bio->bi_sector = bh->b_blocknr * (bh->b_size >> 9); |
| 366 | bio->bi_bdev = bh->b_bdev; |
| 367 | bio_get(bio); |
| 368 | return bio; |
| 369 | } |
| 370 | |
| 371 | STATIC void |
| 372 | xfs_start_buffer_writeback( |
| 373 | struct buffer_head *bh) |
| 374 | { |
| 375 | ASSERT(buffer_mapped(bh)); |
| 376 | ASSERT(buffer_locked(bh)); |
| 377 | ASSERT(!buffer_delay(bh)); |
| 378 | ASSERT(!buffer_unwritten(bh)); |
| 379 | |
| 380 | mark_buffer_async_write(bh); |
| 381 | set_buffer_uptodate(bh); |
| 382 | clear_buffer_dirty(bh); |
| 383 | } |
| 384 | |
| 385 | STATIC void |
| 386 | xfs_start_page_writeback( |
| 387 | struct page *page, |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 388 | int clear_dirty, |
| 389 | int buffers) |
| 390 | { |
| 391 | ASSERT(PageLocked(page)); |
| 392 | ASSERT(!PageWriteback(page)); |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 393 | if (clear_dirty) |
David Chinner | 9213202 | 2006-12-21 10:24:01 +1100 | [diff] [blame] | 394 | clear_page_dirty_for_io(page); |
| 395 | set_page_writeback(page); |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 396 | unlock_page(page); |
Fengguang Wu | 1f7decf | 2007-10-16 23:30:42 -0700 | [diff] [blame] | 397 | /* If no buffers on the page are to be written, finish it here */ |
| 398 | if (!buffers) |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 399 | end_page_writeback(page); |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 400 | } |
| 401 | |
| 402 | static inline int bio_add_buffer(struct bio *bio, struct buffer_head *bh) |
| 403 | { |
| 404 | return bio_add_page(bio, bh->b_page, bh->b_size, bh_offset(bh)); |
| 405 | } |
| 406 | |
| 407 | /* |
David Chinner | d88992f | 2006-01-18 13:38:12 +1100 | [diff] [blame] | 408 | * Submit all of the bios for all of the ioends we have saved up, covering the |
| 409 | * initial writepage page and also any probed pages. |
| 410 | * |
| 411 | * Because we may have multiple ioends spanning a page, we need to start |
| 412 | * writeback on all the buffers before we submit them for I/O. If we mark the |
| 413 | * buffers as we got, then we can end up with a page that only has buffers |
| 414 | * marked async write and I/O complete on can occur before we mark the other |
| 415 | * buffers async write. |
| 416 | * |
| 417 | * The end result of this is that we trip a bug in end_page_writeback() because |
| 418 | * we call it twice for the one page as the code in end_buffer_async_write() |
| 419 | * assumes that all buffers on the page are started at the same time. |
| 420 | * |
| 421 | * The fix is two passes across the ioend list - one to start writeback on the |
Nathan Scott | c41564b | 2006-03-29 08:55:14 +1000 | [diff] [blame] | 422 | * buffer_heads, and then submit them for I/O on the second pass. |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 423 | */ |
| 424 | STATIC void |
| 425 | xfs_submit_ioend( |
Christoph Hellwig | 06342cf | 2009-10-30 09:09:15 +0000 | [diff] [blame] | 426 | struct writeback_control *wbc, |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 427 | xfs_ioend_t *ioend) |
| 428 | { |
David Chinner | d88992f | 2006-01-18 13:38:12 +1100 | [diff] [blame] | 429 | xfs_ioend_t *head = ioend; |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 430 | xfs_ioend_t *next; |
| 431 | struct buffer_head *bh; |
| 432 | struct bio *bio; |
| 433 | sector_t lastblock = 0; |
| 434 | |
David Chinner | d88992f | 2006-01-18 13:38:12 +1100 | [diff] [blame] | 435 | /* Pass 1 - start writeback */ |
| 436 | do { |
| 437 | next = ioend->io_list; |
| 438 | for (bh = ioend->io_buffer_head; bh; bh = bh->b_private) { |
| 439 | xfs_start_buffer_writeback(bh); |
| 440 | } |
| 441 | } while ((ioend = next) != NULL); |
| 442 | |
| 443 | /* Pass 2 - submit I/O */ |
| 444 | ioend = head; |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 445 | do { |
| 446 | next = ioend->io_list; |
| 447 | bio = NULL; |
| 448 | |
| 449 | for (bh = ioend->io_buffer_head; bh; bh = bh->b_private) { |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 450 | |
| 451 | if (!bio) { |
| 452 | retry: |
| 453 | bio = xfs_alloc_ioend_bio(bh); |
| 454 | } else if (bh->b_blocknr != lastblock + 1) { |
Christoph Hellwig | 06342cf | 2009-10-30 09:09:15 +0000 | [diff] [blame] | 455 | xfs_submit_ioend_bio(wbc, ioend, bio); |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 456 | goto retry; |
| 457 | } |
| 458 | |
| 459 | if (bio_add_buffer(bio, bh) != bh->b_size) { |
Christoph Hellwig | 06342cf | 2009-10-30 09:09:15 +0000 | [diff] [blame] | 460 | xfs_submit_ioend_bio(wbc, ioend, bio); |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 461 | goto retry; |
| 462 | } |
| 463 | |
| 464 | lastblock = bh->b_blocknr; |
| 465 | } |
| 466 | if (bio) |
Christoph Hellwig | 06342cf | 2009-10-30 09:09:15 +0000 | [diff] [blame] | 467 | xfs_submit_ioend_bio(wbc, ioend, bio); |
David Chinner | e927af9 | 2007-06-05 16:24:36 +1000 | [diff] [blame] | 468 | xfs_finish_ioend(ioend, 0); |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 469 | } while ((ioend = next) != NULL); |
| 470 | } |
| 471 | |
| 472 | /* |
| 473 | * Cancel submission of all buffer_heads so far in this endio. |
| 474 | * Toss the endio too. Only ever called for the initial page |
| 475 | * in a writepage request, so only ever one page. |
| 476 | */ |
| 477 | STATIC void |
| 478 | xfs_cancel_ioend( |
| 479 | xfs_ioend_t *ioend) |
| 480 | { |
| 481 | xfs_ioend_t *next; |
| 482 | struct buffer_head *bh, *next_bh; |
| 483 | |
| 484 | do { |
| 485 | next = ioend->io_list; |
| 486 | bh = ioend->io_buffer_head; |
| 487 | do { |
| 488 | next_bh = bh->b_private; |
| 489 | clear_buffer_async_write(bh); |
| 490 | unlock_buffer(bh); |
| 491 | } while ((bh = next_bh) != NULL); |
| 492 | |
Christoph Hellwig | 25e41b3 | 2008-12-03 12:20:39 +0100 | [diff] [blame] | 493 | xfs_ioend_wake(XFS_I(ioend->io_inode)); |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 494 | mempool_free(ioend, xfs_ioend_pool); |
| 495 | } while ((ioend = next) != NULL); |
| 496 | } |
| 497 | |
| 498 | /* |
| 499 | * Test to see if we've been building up a completion structure for |
| 500 | * earlier buffers -- if so, we try to append to this ioend if we |
| 501 | * can, otherwise we finish off any current ioend and start another. |
| 502 | * Return true if we've finished the given ioend. |
| 503 | */ |
| 504 | STATIC void |
| 505 | xfs_add_to_ioend( |
| 506 | struct inode *inode, |
| 507 | struct buffer_head *bh, |
Christoph Hellwig | 7336cea | 2006-01-11 20:49:16 +1100 | [diff] [blame] | 508 | xfs_off_t offset, |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 509 | unsigned int type, |
| 510 | xfs_ioend_t **result, |
| 511 | int need_ioend) |
| 512 | { |
| 513 | xfs_ioend_t *ioend = *result; |
| 514 | |
| 515 | if (!ioend || need_ioend || type != ioend->io_type) { |
| 516 | xfs_ioend_t *previous = *result; |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 517 | |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 518 | ioend = xfs_alloc_ioend(inode, type); |
| 519 | ioend->io_offset = offset; |
| 520 | ioend->io_buffer_head = bh; |
| 521 | ioend->io_buffer_tail = bh; |
| 522 | if (previous) |
| 523 | previous->io_list = ioend; |
| 524 | *result = ioend; |
| 525 | } else { |
| 526 | ioend->io_buffer_tail->b_private = bh; |
| 527 | ioend->io_buffer_tail = bh; |
| 528 | } |
| 529 | |
| 530 | bh->b_private = NULL; |
| 531 | ioend->io_size += bh->b_size; |
| 532 | } |
| 533 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | STATIC void |
Nathan Scott | 87cbc49 | 2006-03-14 13:26:43 +1100 | [diff] [blame] | 535 | xfs_map_buffer( |
| 536 | struct buffer_head *bh, |
| 537 | xfs_iomap_t *mp, |
| 538 | xfs_off_t offset, |
| 539 | uint block_bits) |
| 540 | { |
| 541 | sector_t bn; |
| 542 | |
| 543 | ASSERT(mp->iomap_bn != IOMAP_DADDR_NULL); |
| 544 | |
| 545 | bn = (mp->iomap_bn >> (block_bits - BBSHIFT)) + |
| 546 | ((offset - mp->iomap_offset) >> block_bits); |
| 547 | |
| 548 | ASSERT(bn || (mp->iomap_flags & IOMAP_REALTIME)); |
| 549 | |
| 550 | bh->b_blocknr = bn; |
| 551 | set_buffer_mapped(bh); |
| 552 | } |
| 553 | |
| 554 | STATIC void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | xfs_map_at_offset( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 556 | struct buffer_head *bh, |
Christoph Hellwig | 1defeac | 2006-01-11 20:48:33 +1100 | [diff] [blame] | 557 | loff_t offset, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | int block_bits, |
Christoph Hellwig | 1defeac | 2006-01-11 20:48:33 +1100 | [diff] [blame] | 559 | xfs_iomap_t *iomapp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 560 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | ASSERT(!(iomapp->iomap_flags & IOMAP_HOLE)); |
| 562 | ASSERT(!(iomapp->iomap_flags & IOMAP_DELAY)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 563 | |
| 564 | lock_buffer(bh); |
Nathan Scott | 87cbc49 | 2006-03-14 13:26:43 +1100 | [diff] [blame] | 565 | xfs_map_buffer(bh, iomapp, offset, block_bits); |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 566 | bh->b_bdev = iomapp->iomap_target->bt_bdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 567 | set_buffer_mapped(bh); |
| 568 | clear_buffer_delay(bh); |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 569 | clear_buffer_unwritten(bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 570 | } |
| 571 | |
| 572 | /* |
Christoph Hellwig | 6c4fe19 | 2006-01-11 20:49:28 +1100 | [diff] [blame] | 573 | * Look for a page at index that is suitable for clustering. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | */ |
| 575 | STATIC unsigned int |
Christoph Hellwig | 6c4fe19 | 2006-01-11 20:49:28 +1100 | [diff] [blame] | 576 | xfs_probe_page( |
Christoph Hellwig | 10ce444 | 2006-01-11 20:48:14 +1100 | [diff] [blame] | 577 | struct page *page, |
Christoph Hellwig | 6c4fe19 | 2006-01-11 20:49:28 +1100 | [diff] [blame] | 578 | unsigned int pg_offset, |
| 579 | int mapped) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 580 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 581 | int ret = 0; |
| 582 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 583 | if (PageWriteback(page)) |
Christoph Hellwig | 10ce444 | 2006-01-11 20:48:14 +1100 | [diff] [blame] | 584 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 585 | |
| 586 | if (page->mapping && PageDirty(page)) { |
| 587 | if (page_has_buffers(page)) { |
| 588 | struct buffer_head *bh, *head; |
| 589 | |
| 590 | bh = head = page_buffers(page); |
| 591 | do { |
Christoph Hellwig | 6c4fe19 | 2006-01-11 20:49:28 +1100 | [diff] [blame] | 592 | if (!buffer_uptodate(bh)) |
| 593 | break; |
| 594 | if (mapped != buffer_mapped(bh)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 595 | break; |
| 596 | ret += bh->b_size; |
| 597 | if (ret >= pg_offset) |
| 598 | break; |
| 599 | } while ((bh = bh->b_this_page) != head); |
| 600 | } else |
Christoph Hellwig | 6c4fe19 | 2006-01-11 20:49:28 +1100 | [diff] [blame] | 601 | ret = mapped ? 0 : PAGE_CACHE_SIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 602 | } |
| 603 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 604 | return ret; |
| 605 | } |
| 606 | |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 607 | STATIC size_t |
Christoph Hellwig | 6c4fe19 | 2006-01-11 20:49:28 +1100 | [diff] [blame] | 608 | xfs_probe_cluster( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 609 | struct inode *inode, |
| 610 | struct page *startpage, |
| 611 | struct buffer_head *bh, |
Christoph Hellwig | 6c4fe19 | 2006-01-11 20:49:28 +1100 | [diff] [blame] | 612 | struct buffer_head *head, |
| 613 | int mapped) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | { |
Christoph Hellwig | 10ce444 | 2006-01-11 20:48:14 +1100 | [diff] [blame] | 615 | struct pagevec pvec; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 616 | pgoff_t tindex, tlast, tloff; |
Christoph Hellwig | 10ce444 | 2006-01-11 20:48:14 +1100 | [diff] [blame] | 617 | size_t total = 0; |
| 618 | int done = 0, i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 619 | |
| 620 | /* First sum forwards in this page */ |
| 621 | do { |
Eric Sandeen | 2353e8e | 2006-02-28 12:30:30 +1100 | [diff] [blame] | 622 | if (!buffer_uptodate(bh) || (mapped != buffer_mapped(bh))) |
Christoph Hellwig | 10ce444 | 2006-01-11 20:48:14 +1100 | [diff] [blame] | 623 | return total; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 624 | total += bh->b_size; |
| 625 | } while ((bh = bh->b_this_page) != head); |
| 626 | |
Christoph Hellwig | 10ce444 | 2006-01-11 20:48:14 +1100 | [diff] [blame] | 627 | /* if we reached the end of the page, sum forwards in following pages */ |
| 628 | tlast = i_size_read(inode) >> PAGE_CACHE_SHIFT; |
| 629 | tindex = startpage->index + 1; |
| 630 | |
| 631 | /* Prune this back to avoid pathological behavior */ |
| 632 | tloff = min(tlast, startpage->index + 64); |
| 633 | |
| 634 | pagevec_init(&pvec, 0); |
| 635 | while (!done && tindex <= tloff) { |
| 636 | unsigned len = min_t(pgoff_t, PAGEVEC_SIZE, tlast - tindex + 1); |
| 637 | |
| 638 | if (!pagevec_lookup(&pvec, inode->i_mapping, tindex, len)) |
| 639 | break; |
| 640 | |
| 641 | for (i = 0; i < pagevec_count(&pvec); i++) { |
| 642 | struct page *page = pvec.pages[i]; |
Christoph Hellwig | 265c1fa | 2007-08-16 15:38:19 +1000 | [diff] [blame] | 643 | size_t pg_offset, pg_len = 0; |
Christoph Hellwig | 10ce444 | 2006-01-11 20:48:14 +1100 | [diff] [blame] | 644 | |
| 645 | if (tindex == tlast) { |
| 646 | pg_offset = |
| 647 | i_size_read(inode) & (PAGE_CACHE_SIZE - 1); |
Christoph Hellwig | 1defeac | 2006-01-11 20:48:33 +1100 | [diff] [blame] | 648 | if (!pg_offset) { |
| 649 | done = 1; |
Christoph Hellwig | 10ce444 | 2006-01-11 20:48:14 +1100 | [diff] [blame] | 650 | break; |
Christoph Hellwig | 1defeac | 2006-01-11 20:48:33 +1100 | [diff] [blame] | 651 | } |
Christoph Hellwig | 10ce444 | 2006-01-11 20:48:14 +1100 | [diff] [blame] | 652 | } else |
| 653 | pg_offset = PAGE_CACHE_SIZE; |
| 654 | |
Nick Piggin | 529ae9a | 2008-08-02 12:01:03 +0200 | [diff] [blame] | 655 | if (page->index == tindex && trylock_page(page)) { |
Christoph Hellwig | 265c1fa | 2007-08-16 15:38:19 +1000 | [diff] [blame] | 656 | pg_len = xfs_probe_page(page, pg_offset, mapped); |
Christoph Hellwig | 10ce444 | 2006-01-11 20:48:14 +1100 | [diff] [blame] | 657 | unlock_page(page); |
| 658 | } |
| 659 | |
Christoph Hellwig | 265c1fa | 2007-08-16 15:38:19 +1000 | [diff] [blame] | 660 | if (!pg_len) { |
Christoph Hellwig | 10ce444 | 2006-01-11 20:48:14 +1100 | [diff] [blame] | 661 | done = 1; |
| 662 | break; |
| 663 | } |
| 664 | |
Christoph Hellwig | 265c1fa | 2007-08-16 15:38:19 +1000 | [diff] [blame] | 665 | total += pg_len; |
Christoph Hellwig | 1defeac | 2006-01-11 20:48:33 +1100 | [diff] [blame] | 666 | tindex++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 667 | } |
Christoph Hellwig | 10ce444 | 2006-01-11 20:48:14 +1100 | [diff] [blame] | 668 | |
| 669 | pagevec_release(&pvec); |
| 670 | cond_resched(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 671 | } |
Christoph Hellwig | 10ce444 | 2006-01-11 20:48:14 +1100 | [diff] [blame] | 672 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 673 | return total; |
| 674 | } |
| 675 | |
| 676 | /* |
Christoph Hellwig | 10ce444 | 2006-01-11 20:48:14 +1100 | [diff] [blame] | 677 | * Test if a given page is suitable for writing as part of an unwritten |
| 678 | * or delayed allocate extent. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 679 | */ |
Christoph Hellwig | 10ce444 | 2006-01-11 20:48:14 +1100 | [diff] [blame] | 680 | STATIC int |
| 681 | xfs_is_delayed_page( |
| 682 | struct page *page, |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 683 | unsigned int type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 684 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 685 | if (PageWriteback(page)) |
Christoph Hellwig | 10ce444 | 2006-01-11 20:48:14 +1100 | [diff] [blame] | 686 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 687 | |
| 688 | if (page->mapping && page_has_buffers(page)) { |
| 689 | struct buffer_head *bh, *head; |
| 690 | int acceptable = 0; |
| 691 | |
| 692 | bh = head = page_buffers(page); |
| 693 | do { |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 694 | if (buffer_unwritten(bh)) |
| 695 | acceptable = (type == IOMAP_UNWRITTEN); |
| 696 | else if (buffer_delay(bh)) |
| 697 | acceptable = (type == IOMAP_DELAY); |
David Chinner | 2ddee84 | 2006-03-22 12:47:40 +1100 | [diff] [blame] | 698 | else if (buffer_dirty(bh) && buffer_mapped(bh)) |
David Chinner | df3c724 | 2007-05-24 15:27:03 +1000 | [diff] [blame] | 699 | acceptable = (type == IOMAP_NEW); |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 700 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 701 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 702 | } while ((bh = bh->b_this_page) != head); |
| 703 | |
| 704 | if (acceptable) |
Christoph Hellwig | 10ce444 | 2006-01-11 20:48:14 +1100 | [diff] [blame] | 705 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 706 | } |
| 707 | |
Christoph Hellwig | 10ce444 | 2006-01-11 20:48:14 +1100 | [diff] [blame] | 708 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 709 | } |
| 710 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 711 | /* |
| 712 | * Allocate & map buffers for page given the extent map. Write it out. |
| 713 | * except for the original page of a writepage, this is called on |
| 714 | * delalloc/unwritten pages only, for the original page it is possible |
| 715 | * that the page has no mapping at all. |
| 716 | */ |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 717 | STATIC int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 718 | xfs_convert_page( |
| 719 | struct inode *inode, |
| 720 | struct page *page, |
Christoph Hellwig | 10ce444 | 2006-01-11 20:48:14 +1100 | [diff] [blame] | 721 | loff_t tindex, |
Christoph Hellwig | 1defeac | 2006-01-11 20:48:33 +1100 | [diff] [blame] | 722 | xfs_iomap_t *mp, |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 723 | xfs_ioend_t **ioendp, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 724 | struct writeback_control *wbc, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 725 | int startio, |
| 726 | int all_bh) |
| 727 | { |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 728 | struct buffer_head *bh, *head; |
Christoph Hellwig | 9260dc6 | 2006-01-11 20:48:47 +1100 | [diff] [blame] | 729 | xfs_off_t end_offset; |
| 730 | unsigned long p_offset; |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 731 | unsigned int type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 732 | int bbits = inode->i_blkbits; |
Nathan Scott | 24e17b5 | 2005-05-05 13:33:20 -0700 | [diff] [blame] | 733 | int len, page_dirty; |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 734 | int count = 0, done = 0, uptodate = 1; |
Christoph Hellwig | 9260dc6 | 2006-01-11 20:48:47 +1100 | [diff] [blame] | 735 | xfs_off_t offset = page_offset(page); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 736 | |
Christoph Hellwig | 10ce444 | 2006-01-11 20:48:14 +1100 | [diff] [blame] | 737 | if (page->index != tindex) |
| 738 | goto fail; |
Nick Piggin | 529ae9a | 2008-08-02 12:01:03 +0200 | [diff] [blame] | 739 | if (!trylock_page(page)) |
Christoph Hellwig | 10ce444 | 2006-01-11 20:48:14 +1100 | [diff] [blame] | 740 | goto fail; |
| 741 | if (PageWriteback(page)) |
| 742 | goto fail_unlock_page; |
| 743 | if (page->mapping != inode->i_mapping) |
| 744 | goto fail_unlock_page; |
| 745 | if (!xfs_is_delayed_page(page, (*ioendp)->io_type)) |
| 746 | goto fail_unlock_page; |
| 747 | |
Nathan Scott | 24e17b5 | 2005-05-05 13:33:20 -0700 | [diff] [blame] | 748 | /* |
| 749 | * page_dirty is initially a count of buffers on the page before |
Nathan Scott | c41564b | 2006-03-29 08:55:14 +1000 | [diff] [blame] | 750 | * EOF and is decremented as we move each into a cleanable state. |
Christoph Hellwig | 9260dc6 | 2006-01-11 20:48:47 +1100 | [diff] [blame] | 751 | * |
| 752 | * Derivation: |
| 753 | * |
| 754 | * End offset is the highest offset that this page should represent. |
| 755 | * If we are on the last page, (end_offset & (PAGE_CACHE_SIZE - 1)) |
| 756 | * will evaluate non-zero and be less than PAGE_CACHE_SIZE and |
| 757 | * hence give us the correct page_dirty count. On any other page, |
| 758 | * it will be zero and in that case we need page_dirty to be the |
| 759 | * count of buffers on the page. |
Nathan Scott | 24e17b5 | 2005-05-05 13:33:20 -0700 | [diff] [blame] | 760 | */ |
Christoph Hellwig | 9260dc6 | 2006-01-11 20:48:47 +1100 | [diff] [blame] | 761 | end_offset = min_t(unsigned long long, |
| 762 | (xfs_off_t)(page->index + 1) << PAGE_CACHE_SHIFT, |
| 763 | i_size_read(inode)); |
| 764 | |
Nathan Scott | 24e17b5 | 2005-05-05 13:33:20 -0700 | [diff] [blame] | 765 | len = 1 << inode->i_blkbits; |
Christoph Hellwig | 9260dc6 | 2006-01-11 20:48:47 +1100 | [diff] [blame] | 766 | p_offset = min_t(unsigned long, end_offset & (PAGE_CACHE_SIZE - 1), |
| 767 | PAGE_CACHE_SIZE); |
| 768 | p_offset = p_offset ? roundup(p_offset, len) : PAGE_CACHE_SIZE; |
| 769 | page_dirty = p_offset / len; |
Nathan Scott | 24e17b5 | 2005-05-05 13:33:20 -0700 | [diff] [blame] | 770 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 771 | bh = head = page_buffers(page); |
| 772 | do { |
Christoph Hellwig | 9260dc6 | 2006-01-11 20:48:47 +1100 | [diff] [blame] | 773 | if (offset >= end_offset) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 774 | break; |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 775 | if (!buffer_uptodate(bh)) |
| 776 | uptodate = 0; |
| 777 | if (!(PageUptodate(page) || buffer_uptodate(bh))) { |
| 778 | done = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 779 | continue; |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 780 | } |
| 781 | |
Christoph Hellwig | 9260dc6 | 2006-01-11 20:48:47 +1100 | [diff] [blame] | 782 | if (buffer_unwritten(bh) || buffer_delay(bh)) { |
| 783 | if (buffer_unwritten(bh)) |
| 784 | type = IOMAP_UNWRITTEN; |
| 785 | else |
| 786 | type = IOMAP_DELAY; |
| 787 | |
| 788 | if (!xfs_iomap_valid(mp, offset)) { |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 789 | done = 1; |
Christoph Hellwig | 9260dc6 | 2006-01-11 20:48:47 +1100 | [diff] [blame] | 790 | continue; |
| 791 | } |
| 792 | |
| 793 | ASSERT(!(mp->iomap_flags & IOMAP_HOLE)); |
| 794 | ASSERT(!(mp->iomap_flags & IOMAP_DELAY)); |
| 795 | |
| 796 | xfs_map_at_offset(bh, offset, bbits, mp); |
| 797 | if (startio) { |
Christoph Hellwig | 7336cea | 2006-01-11 20:49:16 +1100 | [diff] [blame] | 798 | xfs_add_to_ioend(inode, bh, offset, |
Christoph Hellwig | 9260dc6 | 2006-01-11 20:48:47 +1100 | [diff] [blame] | 799 | type, ioendp, done); |
| 800 | } else { |
| 801 | set_buffer_dirty(bh); |
| 802 | unlock_buffer(bh); |
| 803 | mark_buffer_dirty(bh); |
| 804 | } |
| 805 | page_dirty--; |
| 806 | count++; |
| 807 | } else { |
David Chinner | df3c724 | 2007-05-24 15:27:03 +1000 | [diff] [blame] | 808 | type = IOMAP_NEW; |
Christoph Hellwig | 9260dc6 | 2006-01-11 20:48:47 +1100 | [diff] [blame] | 809 | if (buffer_mapped(bh) && all_bh && startio) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 810 | lock_buffer(bh); |
Christoph Hellwig | 7336cea | 2006-01-11 20:49:16 +1100 | [diff] [blame] | 811 | xfs_add_to_ioend(inode, bh, offset, |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 812 | type, ioendp, done); |
| 813 | count++; |
Nathan Scott | 24e17b5 | 2005-05-05 13:33:20 -0700 | [diff] [blame] | 814 | page_dirty--; |
Christoph Hellwig | 9260dc6 | 2006-01-11 20:48:47 +1100 | [diff] [blame] | 815 | } else { |
| 816 | done = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 817 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 818 | } |
Christoph Hellwig | 7336cea | 2006-01-11 20:49:16 +1100 | [diff] [blame] | 819 | } while (offset += len, (bh = bh->b_this_page) != head); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 820 | |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 821 | if (uptodate && bh == head) |
| 822 | SetPageUptodate(page); |
| 823 | |
| 824 | if (startio) { |
Christoph Hellwig | f5e596b | 2006-01-11 20:49:42 +1100 | [diff] [blame] | 825 | if (count) { |
David Chinner | 9fddaca | 2006-02-07 20:27:24 +1100 | [diff] [blame] | 826 | wbc->nr_to_write--; |
Wu Fengguang | 0d99519 | 2009-12-03 13:54:25 +0100 | [diff] [blame] | 827 | if (wbc->nr_to_write <= 0) |
Christoph Hellwig | f5e596b | 2006-01-11 20:49:42 +1100 | [diff] [blame] | 828 | done = 1; |
Christoph Hellwig | f5e596b | 2006-01-11 20:49:42 +1100 | [diff] [blame] | 829 | } |
Denys Vlasenko | b41759c | 2008-05-19 16:34:11 +1000 | [diff] [blame] | 830 | xfs_start_page_writeback(page, !page_dirty, count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 831 | } |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 832 | |
| 833 | return done; |
Christoph Hellwig | 10ce444 | 2006-01-11 20:48:14 +1100 | [diff] [blame] | 834 | fail_unlock_page: |
| 835 | unlock_page(page); |
| 836 | fail: |
| 837 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 838 | } |
| 839 | |
| 840 | /* |
| 841 | * Convert & write out a cluster of pages in the same extent as defined |
| 842 | * by mp and following the start page. |
| 843 | */ |
| 844 | STATIC void |
| 845 | xfs_cluster_write( |
| 846 | struct inode *inode, |
| 847 | pgoff_t tindex, |
| 848 | xfs_iomap_t *iomapp, |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 849 | xfs_ioend_t **ioendp, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 850 | struct writeback_control *wbc, |
| 851 | int startio, |
| 852 | int all_bh, |
| 853 | pgoff_t tlast) |
| 854 | { |
Christoph Hellwig | 10ce444 | 2006-01-11 20:48:14 +1100 | [diff] [blame] | 855 | struct pagevec pvec; |
| 856 | int done = 0, i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 857 | |
Christoph Hellwig | 10ce444 | 2006-01-11 20:48:14 +1100 | [diff] [blame] | 858 | pagevec_init(&pvec, 0); |
| 859 | while (!done && tindex <= tlast) { |
| 860 | unsigned len = min_t(pgoff_t, PAGEVEC_SIZE, tlast - tindex + 1); |
| 861 | |
| 862 | if (!pagevec_lookup(&pvec, inode->i_mapping, tindex, len)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 863 | break; |
Christoph Hellwig | 10ce444 | 2006-01-11 20:48:14 +1100 | [diff] [blame] | 864 | |
| 865 | for (i = 0; i < pagevec_count(&pvec); i++) { |
| 866 | done = xfs_convert_page(inode, pvec.pages[i], tindex++, |
| 867 | iomapp, ioendp, wbc, startio, all_bh); |
| 868 | if (done) |
| 869 | break; |
| 870 | } |
| 871 | |
| 872 | pagevec_release(&pvec); |
| 873 | cond_resched(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 874 | } |
| 875 | } |
| 876 | |
| 877 | /* |
| 878 | * Calling this without startio set means we are being asked to make a dirty |
| 879 | * page ready for freeing it's buffers. When called with startio set then |
| 880 | * we are coming from writepage. |
| 881 | * |
| 882 | * When called with startio set it is important that we write the WHOLE |
| 883 | * page if possible. |
| 884 | * The bh->b_state's cannot know if any of the blocks or which block for |
| 885 | * that matter are dirty due to mmap writes, and therefore bh uptodate is |
Nathan Scott | c41564b | 2006-03-29 08:55:14 +1000 | [diff] [blame] | 886 | * only valid if the page itself isn't completely uptodate. Some layers |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 887 | * may clear the page dirty flag prior to calling write page, under the |
| 888 | * assumption the entire page will be written out; by not writing out the |
| 889 | * whole page the page can be reused before all valid dirty data is |
| 890 | * written out. Note: in the case of a page that has been dirty'd by |
| 891 | * mapwrite and but partially setup by block_prepare_write the |
| 892 | * bh->b_states's will not agree and only ones setup by BPW/BCW will have |
| 893 | * valid state, thus the whole page must be written out thing. |
| 894 | */ |
| 895 | |
| 896 | STATIC int |
| 897 | xfs_page_state_convert( |
| 898 | struct inode *inode, |
| 899 | struct page *page, |
| 900 | struct writeback_control *wbc, |
| 901 | int startio, |
| 902 | int unmapped) /* also implies page uptodate */ |
| 903 | { |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 904 | struct buffer_head *bh, *head; |
Christoph Hellwig | 1defeac | 2006-01-11 20:48:33 +1100 | [diff] [blame] | 905 | xfs_iomap_t iomap; |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 906 | xfs_ioend_t *ioend = NULL, *iohead = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 907 | loff_t offset; |
| 908 | unsigned long p_offset = 0; |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 909 | unsigned int type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 910 | __uint64_t end_offset; |
| 911 | pgoff_t end_index, last_index, tlast; |
Christoph Hellwig | d5cb48a | 2006-01-11 20:49:02 +1100 | [diff] [blame] | 912 | ssize_t size, len; |
| 913 | int flags, err, iomap_valid = 0, uptodate = 1; |
Nathan Scott | 8272145 | 2006-04-11 15:10:55 +1000 | [diff] [blame] | 914 | int page_dirty, count = 0; |
| 915 | int trylock = 0; |
Christoph Hellwig | 6c4fe19 | 2006-01-11 20:49:28 +1100 | [diff] [blame] | 916 | int all_bh = unmapped; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 917 | |
Nathan Scott | 8272145 | 2006-04-11 15:10:55 +1000 | [diff] [blame] | 918 | if (startio) { |
| 919 | if (wbc->sync_mode == WB_SYNC_NONE && wbc->nonblocking) |
| 920 | trylock |= BMAPI_TRYLOCK; |
| 921 | } |
Daniel Moore | 3ba0815 | 2005-05-05 13:31:34 -0700 | [diff] [blame] | 922 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 923 | /* Is this page beyond the end of the file? */ |
| 924 | offset = i_size_read(inode); |
| 925 | end_index = offset >> PAGE_CACHE_SHIFT; |
| 926 | last_index = (offset - 1) >> PAGE_CACHE_SHIFT; |
| 927 | if (page->index >= end_index) { |
| 928 | if ((page->index >= end_index + 1) || |
| 929 | !(i_size_read(inode) & (PAGE_CACHE_SIZE - 1))) { |
Nathan Scott | 19d5bcf | 2005-11-02 15:14:09 +1100 | [diff] [blame] | 930 | if (startio) |
| 931 | unlock_page(page); |
| 932 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 933 | } |
| 934 | } |
| 935 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 936 | /* |
Nathan Scott | 24e17b5 | 2005-05-05 13:33:20 -0700 | [diff] [blame] | 937 | * page_dirty is initially a count of buffers on the page before |
Nathan Scott | c41564b | 2006-03-29 08:55:14 +1000 | [diff] [blame] | 938 | * EOF and is decremented as we move each into a cleanable state. |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 939 | * |
| 940 | * Derivation: |
| 941 | * |
| 942 | * End offset is the highest offset that this page should represent. |
| 943 | * If we are on the last page, (end_offset & (PAGE_CACHE_SIZE - 1)) |
| 944 | * will evaluate non-zero and be less than PAGE_CACHE_SIZE and |
| 945 | * hence give us the correct page_dirty count. On any other page, |
| 946 | * it will be zero and in that case we need page_dirty to be the |
| 947 | * count of buffers on the page. |
| 948 | */ |
| 949 | end_offset = min_t(unsigned long long, |
| 950 | (xfs_off_t)(page->index + 1) << PAGE_CACHE_SHIFT, offset); |
Nathan Scott | 24e17b5 | 2005-05-05 13:33:20 -0700 | [diff] [blame] | 951 | len = 1 << inode->i_blkbits; |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 952 | p_offset = min_t(unsigned long, end_offset & (PAGE_CACHE_SIZE - 1), |
| 953 | PAGE_CACHE_SIZE); |
| 954 | p_offset = p_offset ? roundup(p_offset, len) : PAGE_CACHE_SIZE; |
Nathan Scott | 24e17b5 | 2005-05-05 13:33:20 -0700 | [diff] [blame] | 955 | page_dirty = p_offset / len; |
| 956 | |
Nathan Scott | 24e17b5 | 2005-05-05 13:33:20 -0700 | [diff] [blame] | 957 | bh = head = page_buffers(page); |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 958 | offset = page_offset(page); |
David Chinner | df3c724 | 2007-05-24 15:27:03 +1000 | [diff] [blame] | 959 | flags = BMAPI_READ; |
| 960 | type = IOMAP_NEW; |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 961 | |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 962 | /* TODO: cleanup count and page_dirty */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 963 | |
| 964 | do { |
| 965 | if (offset >= end_offset) |
| 966 | break; |
| 967 | if (!buffer_uptodate(bh)) |
| 968 | uptodate = 0; |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 969 | if (!(PageUptodate(page) || buffer_uptodate(bh)) && !startio) { |
Christoph Hellwig | 1defeac | 2006-01-11 20:48:33 +1100 | [diff] [blame] | 970 | /* |
| 971 | * the iomap is actually still valid, but the ioend |
| 972 | * isn't. shouldn't happen too often. |
| 973 | */ |
| 974 | iomap_valid = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 975 | continue; |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 976 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 977 | |
Christoph Hellwig | 1defeac | 2006-01-11 20:48:33 +1100 | [diff] [blame] | 978 | if (iomap_valid) |
| 979 | iomap_valid = xfs_iomap_valid(&iomap, offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 980 | |
| 981 | /* |
| 982 | * First case, map an unwritten extent and prepare for |
| 983 | * extent state conversion transaction on completion. |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 984 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 985 | * Second case, allocate space for a delalloc buffer. |
| 986 | * We can return EAGAIN here in the release page case. |
Christoph Hellwig | d5cb48a | 2006-01-11 20:49:02 +1100 | [diff] [blame] | 987 | * |
| 988 | * Third case, an unmapped buffer was found, and we are |
| 989 | * in a path where we need to write the whole page out. |
David Chinner | df3c724 | 2007-05-24 15:27:03 +1000 | [diff] [blame] | 990 | */ |
Christoph Hellwig | d5cb48a | 2006-01-11 20:49:02 +1100 | [diff] [blame] | 991 | if (buffer_unwritten(bh) || buffer_delay(bh) || |
| 992 | ((buffer_uptodate(bh) || PageUptodate(page)) && |
| 993 | !buffer_mapped(bh) && (unmapped || startio))) { |
David Chinner | effd120 | 2007-06-18 16:49:58 +1000 | [diff] [blame] | 994 | int new_ioend = 0; |
| 995 | |
David Chinner | df3c724 | 2007-05-24 15:27:03 +1000 | [diff] [blame] | 996 | /* |
Christoph Hellwig | 6c4fe19 | 2006-01-11 20:49:28 +1100 | [diff] [blame] | 997 | * Make sure we don't use a read-only iomap |
| 998 | */ |
David Chinner | df3c724 | 2007-05-24 15:27:03 +1000 | [diff] [blame] | 999 | if (flags == BMAPI_READ) |
Christoph Hellwig | 6c4fe19 | 2006-01-11 20:49:28 +1100 | [diff] [blame] | 1000 | iomap_valid = 0; |
| 1001 | |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 1002 | if (buffer_unwritten(bh)) { |
| 1003 | type = IOMAP_UNWRITTEN; |
Nathan Scott | 8272145 | 2006-04-11 15:10:55 +1000 | [diff] [blame] | 1004 | flags = BMAPI_WRITE | BMAPI_IGNSTATE; |
Christoph Hellwig | d5cb48a | 2006-01-11 20:49:02 +1100 | [diff] [blame] | 1005 | } else if (buffer_delay(bh)) { |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 1006 | type = IOMAP_DELAY; |
Nathan Scott | 8272145 | 2006-04-11 15:10:55 +1000 | [diff] [blame] | 1007 | flags = BMAPI_ALLOCATE | trylock; |
Christoph Hellwig | d5cb48a | 2006-01-11 20:49:02 +1100 | [diff] [blame] | 1008 | } else { |
Christoph Hellwig | 6c4fe19 | 2006-01-11 20:49:28 +1100 | [diff] [blame] | 1009 | type = IOMAP_NEW; |
Nathan Scott | 8272145 | 2006-04-11 15:10:55 +1000 | [diff] [blame] | 1010 | flags = BMAPI_WRITE | BMAPI_MMAP; |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 1011 | } |
| 1012 | |
Christoph Hellwig | 1defeac | 2006-01-11 20:48:33 +1100 | [diff] [blame] | 1013 | if (!iomap_valid) { |
David Chinner | effd120 | 2007-06-18 16:49:58 +1000 | [diff] [blame] | 1014 | /* |
| 1015 | * if we didn't have a valid mapping then we |
| 1016 | * need to ensure that we put the new mapping |
| 1017 | * in a new ioend structure. This needs to be |
| 1018 | * done to ensure that the ioends correctly |
| 1019 | * reflect the block mappings at io completion |
| 1020 | * for unwritten extent conversion. |
| 1021 | */ |
| 1022 | new_ioend = 1; |
Christoph Hellwig | 6c4fe19 | 2006-01-11 20:49:28 +1100 | [diff] [blame] | 1023 | if (type == IOMAP_NEW) { |
| 1024 | size = xfs_probe_cluster(inode, |
| 1025 | page, bh, head, 0); |
Christoph Hellwig | d5cb48a | 2006-01-11 20:49:02 +1100 | [diff] [blame] | 1026 | } else { |
| 1027 | size = len; |
| 1028 | } |
| 1029 | |
| 1030 | err = xfs_map_blocks(inode, offset, size, |
| 1031 | &iomap, flags); |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 1032 | if (err) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1033 | goto error; |
Christoph Hellwig | 1defeac | 2006-01-11 20:48:33 +1100 | [diff] [blame] | 1034 | iomap_valid = xfs_iomap_valid(&iomap, offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1035 | } |
Christoph Hellwig | 1defeac | 2006-01-11 20:48:33 +1100 | [diff] [blame] | 1036 | if (iomap_valid) { |
| 1037 | xfs_map_at_offset(bh, offset, |
| 1038 | inode->i_blkbits, &iomap); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1039 | if (startio) { |
Christoph Hellwig | 7336cea | 2006-01-11 20:49:16 +1100 | [diff] [blame] | 1040 | xfs_add_to_ioend(inode, bh, offset, |
Christoph Hellwig | 1defeac | 2006-01-11 20:48:33 +1100 | [diff] [blame] | 1041 | type, &ioend, |
David Chinner | effd120 | 2007-06-18 16:49:58 +1000 | [diff] [blame] | 1042 | new_ioend); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1043 | } else { |
| 1044 | set_buffer_dirty(bh); |
| 1045 | unlock_buffer(bh); |
| 1046 | mark_buffer_dirty(bh); |
| 1047 | } |
| 1048 | page_dirty--; |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 1049 | count++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1050 | } |
Christoph Hellwig | d5cb48a | 2006-01-11 20:49:02 +1100 | [diff] [blame] | 1051 | } else if (buffer_uptodate(bh) && startio) { |
Christoph Hellwig | 6c4fe19 | 2006-01-11 20:49:28 +1100 | [diff] [blame] | 1052 | /* |
| 1053 | * we got here because the buffer is already mapped. |
| 1054 | * That means it must already have extents allocated |
| 1055 | * underneath it. Map the extent by reading it. |
| 1056 | */ |
David Chinner | df3c724 | 2007-05-24 15:27:03 +1000 | [diff] [blame] | 1057 | if (!iomap_valid || flags != BMAPI_READ) { |
Christoph Hellwig | 6c4fe19 | 2006-01-11 20:49:28 +1100 | [diff] [blame] | 1058 | flags = BMAPI_READ; |
| 1059 | size = xfs_probe_cluster(inode, page, bh, |
| 1060 | head, 1); |
| 1061 | err = xfs_map_blocks(inode, offset, size, |
| 1062 | &iomap, flags); |
| 1063 | if (err) |
| 1064 | goto error; |
| 1065 | iomap_valid = xfs_iomap_valid(&iomap, offset); |
| 1066 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1067 | |
David Chinner | df3c724 | 2007-05-24 15:27:03 +1000 | [diff] [blame] | 1068 | /* |
| 1069 | * We set the type to IOMAP_NEW in case we are doing a |
| 1070 | * small write at EOF that is extending the file but |
| 1071 | * without needing an allocation. We need to update the |
| 1072 | * file size on I/O completion in this case so it is |
| 1073 | * the same case as having just allocated a new extent |
| 1074 | * that we are writing into for the first time. |
| 1075 | */ |
| 1076 | type = IOMAP_NEW; |
Nick Piggin | ca5de40 | 2008-08-02 12:02:13 +0200 | [diff] [blame] | 1077 | if (trylock_buffer(bh)) { |
Christoph Hellwig | d5cb48a | 2006-01-11 20:49:02 +1100 | [diff] [blame] | 1078 | ASSERT(buffer_mapped(bh)); |
Christoph Hellwig | 6c4fe19 | 2006-01-11 20:49:28 +1100 | [diff] [blame] | 1079 | if (iomap_valid) |
| 1080 | all_bh = 1; |
Christoph Hellwig | 7336cea | 2006-01-11 20:49:16 +1100 | [diff] [blame] | 1081 | xfs_add_to_ioend(inode, bh, offset, type, |
Christoph Hellwig | d5cb48a | 2006-01-11 20:49:02 +1100 | [diff] [blame] | 1082 | &ioend, !iomap_valid); |
| 1083 | page_dirty--; |
| 1084 | count++; |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 1085 | } else { |
Christoph Hellwig | 1defeac | 2006-01-11 20:48:33 +1100 | [diff] [blame] | 1086 | iomap_valid = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1087 | } |
Christoph Hellwig | d5cb48a | 2006-01-11 20:49:02 +1100 | [diff] [blame] | 1088 | } else if ((buffer_uptodate(bh) || PageUptodate(page)) && |
| 1089 | (unmapped || startio)) { |
| 1090 | iomap_valid = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1091 | } |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 1092 | |
| 1093 | if (!iohead) |
| 1094 | iohead = ioend; |
| 1095 | |
| 1096 | } while (offset += len, ((bh = bh->b_this_page) != head)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1097 | |
| 1098 | if (uptodate && bh == head) |
| 1099 | SetPageUptodate(page); |
| 1100 | |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 1101 | if (startio) |
Denys Vlasenko | b41759c | 2008-05-19 16:34:11 +1000 | [diff] [blame] | 1102 | xfs_start_page_writeback(page, 1, count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1103 | |
Christoph Hellwig | 1defeac | 2006-01-11 20:48:33 +1100 | [diff] [blame] | 1104 | if (ioend && iomap_valid) { |
| 1105 | offset = (iomap.iomap_offset + iomap.iomap_bsize - 1) >> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1106 | PAGE_CACHE_SHIFT; |
Nathan Scott | 775bf6c | 2005-05-05 13:33:01 -0700 | [diff] [blame] | 1107 | tlast = min_t(pgoff_t, offset, last_index); |
Christoph Hellwig | 1defeac | 2006-01-11 20:48:33 +1100 | [diff] [blame] | 1108 | xfs_cluster_write(inode, page->index + 1, &iomap, &ioend, |
Christoph Hellwig | 6c4fe19 | 2006-01-11 20:49:28 +1100 | [diff] [blame] | 1109 | wbc, startio, all_bh, tlast); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1110 | } |
| 1111 | |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 1112 | if (iohead) |
Christoph Hellwig | 06342cf | 2009-10-30 09:09:15 +0000 | [diff] [blame] | 1113 | xfs_submit_ioend(wbc, iohead); |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 1114 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1115 | return page_dirty; |
| 1116 | |
| 1117 | error: |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 1118 | if (iohead) |
| 1119 | xfs_cancel_ioend(iohead); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1120 | |
| 1121 | /* |
| 1122 | * If it's delalloc and we have nowhere to put it, |
| 1123 | * throw it away, unless the lower layers told |
| 1124 | * us to try again. |
| 1125 | */ |
| 1126 | if (err != -EAGAIN) { |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 1127 | if (!unmapped) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1128 | block_invalidatepage(page, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1129 | ClearPageUptodate(page); |
| 1130 | } |
| 1131 | return err; |
| 1132 | } |
| 1133 | |
Nathan Scott | f51623b | 2006-03-14 13:26:27 +1100 | [diff] [blame] | 1134 | /* |
| 1135 | * writepage: Called from one of two places: |
| 1136 | * |
| 1137 | * 1. we are flushing a delalloc buffer head. |
| 1138 | * |
| 1139 | * 2. we are writing out a dirty page. Typically the page dirty |
| 1140 | * state is cleared before we get here. In this case is it |
| 1141 | * conceivable we have no buffer heads. |
| 1142 | * |
| 1143 | * For delalloc space on the page we need to allocate space and |
| 1144 | * flush it. For unmapped buffer heads on the page we should |
| 1145 | * allocate space if the page is uptodate. For any other dirty |
| 1146 | * buffer heads on the page we should flush them. |
| 1147 | * |
| 1148 | * If we detect that a transaction would be required to flush |
| 1149 | * the page, we have to check the process flags first, if we |
| 1150 | * are already in a transaction or disk I/O during allocations |
| 1151 | * is off, we need to fail the writepage and redirty the page. |
| 1152 | */ |
| 1153 | |
| 1154 | STATIC int |
Nathan Scott | e4c573b | 2006-03-14 13:54:26 +1100 | [diff] [blame] | 1155 | xfs_vm_writepage( |
Nathan Scott | f51623b | 2006-03-14 13:26:27 +1100 | [diff] [blame] | 1156 | struct page *page, |
| 1157 | struct writeback_control *wbc) |
| 1158 | { |
| 1159 | int error; |
| 1160 | int need_trans; |
| 1161 | int delalloc, unmapped, unwritten; |
| 1162 | struct inode *inode = page->mapping->host; |
| 1163 | |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 1164 | trace_xfs_writepage(inode, page, 0); |
Nathan Scott | f51623b | 2006-03-14 13:26:27 +1100 | [diff] [blame] | 1165 | |
| 1166 | /* |
| 1167 | * We need a transaction if: |
| 1168 | * 1. There are delalloc buffers on the page |
| 1169 | * 2. The page is uptodate and we have unmapped buffers |
| 1170 | * 3. The page is uptodate and we have no buffers |
| 1171 | * 4. There are unwritten buffers on the page |
| 1172 | */ |
| 1173 | |
| 1174 | if (!page_has_buffers(page)) { |
| 1175 | unmapped = 1; |
| 1176 | need_trans = 1; |
| 1177 | } else { |
| 1178 | xfs_count_page_state(page, &delalloc, &unmapped, &unwritten); |
| 1179 | if (!PageUptodate(page)) |
| 1180 | unmapped = 0; |
| 1181 | need_trans = delalloc + unmapped + unwritten; |
| 1182 | } |
| 1183 | |
| 1184 | /* |
| 1185 | * If we need a transaction and the process flags say |
| 1186 | * we are already in a transaction, or no IO is allowed |
| 1187 | * then mark the page dirty again and leave the page |
| 1188 | * as is. |
| 1189 | */ |
Nathan Scott | 59c1b08 | 2006-06-09 14:59:13 +1000 | [diff] [blame] | 1190 | if (current_test_flags(PF_FSTRANS) && need_trans) |
Nathan Scott | f51623b | 2006-03-14 13:26:27 +1100 | [diff] [blame] | 1191 | goto out_fail; |
| 1192 | |
| 1193 | /* |
| 1194 | * Delay hooking up buffer heads until we have |
| 1195 | * made our go/no-go decision. |
| 1196 | */ |
| 1197 | if (!page_has_buffers(page)) |
| 1198 | create_empty_buffers(page, 1 << inode->i_blkbits, 0); |
| 1199 | |
Eric Sandeen | c8a4051 | 2009-07-31 00:02:17 -0500 | [diff] [blame] | 1200 | |
| 1201 | /* |
| 1202 | * VM calculation for nr_to_write seems off. Bump it way |
| 1203 | * up, this gets simple streaming writes zippy again. |
| 1204 | * To be reviewed again after Jens' writeback changes. |
| 1205 | */ |
| 1206 | wbc->nr_to_write *= 4; |
| 1207 | |
Nathan Scott | f51623b | 2006-03-14 13:26:27 +1100 | [diff] [blame] | 1208 | /* |
| 1209 | * Convert delayed allocate, unwritten or unmapped space |
| 1210 | * to real space and flush out to disk. |
| 1211 | */ |
| 1212 | error = xfs_page_state_convert(inode, page, wbc, 1, unmapped); |
| 1213 | if (error == -EAGAIN) |
| 1214 | goto out_fail; |
| 1215 | if (unlikely(error < 0)) |
| 1216 | goto out_unlock; |
| 1217 | |
| 1218 | return 0; |
| 1219 | |
| 1220 | out_fail: |
| 1221 | redirty_page_for_writepage(wbc, page); |
| 1222 | unlock_page(page); |
| 1223 | return 0; |
| 1224 | out_unlock: |
| 1225 | unlock_page(page); |
| 1226 | return error; |
| 1227 | } |
| 1228 | |
Nathan Scott | 7d4fb40 | 2006-06-09 15:27:16 +1000 | [diff] [blame] | 1229 | STATIC int |
| 1230 | xfs_vm_writepages( |
| 1231 | struct address_space *mapping, |
| 1232 | struct writeback_control *wbc) |
| 1233 | { |
Christoph Hellwig | b3aea4e | 2007-08-29 11:44:37 +1000 | [diff] [blame] | 1234 | xfs_iflags_clear(XFS_I(mapping->host), XFS_ITRUNCATED); |
Nathan Scott | 7d4fb40 | 2006-06-09 15:27:16 +1000 | [diff] [blame] | 1235 | return generic_writepages(mapping, wbc); |
| 1236 | } |
| 1237 | |
Nathan Scott | f51623b | 2006-03-14 13:26:27 +1100 | [diff] [blame] | 1238 | /* |
| 1239 | * Called to move a page into cleanable state - and from there |
| 1240 | * to be released. Possibly the page is already clean. We always |
| 1241 | * have buffer heads in this call. |
| 1242 | * |
| 1243 | * Returns 0 if the page is ok to release, 1 otherwise. |
| 1244 | * |
| 1245 | * Possible scenarios are: |
| 1246 | * |
| 1247 | * 1. We are being called to release a page which has been written |
| 1248 | * to via regular I/O. buffer heads will be dirty and possibly |
| 1249 | * delalloc. If no delalloc buffer heads in this case then we |
| 1250 | * can just return zero. |
| 1251 | * |
| 1252 | * 2. We are called to release a page which has been written via |
| 1253 | * mmap, all we need to do is ensure there is no delalloc |
| 1254 | * state in the buffer heads, if not we can let the caller |
| 1255 | * free them and we should come back later via writepage. |
| 1256 | */ |
| 1257 | STATIC int |
Nathan Scott | 238f4c5 | 2006-03-17 17:26:25 +1100 | [diff] [blame] | 1258 | xfs_vm_releasepage( |
Nathan Scott | f51623b | 2006-03-14 13:26:27 +1100 | [diff] [blame] | 1259 | struct page *page, |
| 1260 | gfp_t gfp_mask) |
| 1261 | { |
| 1262 | struct inode *inode = page->mapping->host; |
| 1263 | int dirty, delalloc, unmapped, unwritten; |
| 1264 | struct writeback_control wbc = { |
| 1265 | .sync_mode = WB_SYNC_ALL, |
| 1266 | .nr_to_write = 1, |
| 1267 | }; |
| 1268 | |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 1269 | trace_xfs_releasepage(inode, page, 0); |
Nathan Scott | f51623b | 2006-03-14 13:26:27 +1100 | [diff] [blame] | 1270 | |
Nathan Scott | 238f4c5 | 2006-03-17 17:26:25 +1100 | [diff] [blame] | 1271 | if (!page_has_buffers(page)) |
| 1272 | return 0; |
| 1273 | |
Nathan Scott | f51623b | 2006-03-14 13:26:27 +1100 | [diff] [blame] | 1274 | xfs_count_page_state(page, &delalloc, &unmapped, &unwritten); |
| 1275 | if (!delalloc && !unwritten) |
| 1276 | goto free_buffers; |
| 1277 | |
| 1278 | if (!(gfp_mask & __GFP_FS)) |
| 1279 | return 0; |
| 1280 | |
| 1281 | /* If we are already inside a transaction or the thread cannot |
| 1282 | * do I/O, we cannot release this page. |
| 1283 | */ |
Nathan Scott | 59c1b08 | 2006-06-09 14:59:13 +1000 | [diff] [blame] | 1284 | if (current_test_flags(PF_FSTRANS)) |
Nathan Scott | f51623b | 2006-03-14 13:26:27 +1100 | [diff] [blame] | 1285 | return 0; |
| 1286 | |
| 1287 | /* |
| 1288 | * Convert delalloc space to real space, do not flush the |
| 1289 | * data out to disk, that will be done by the caller. |
| 1290 | * Never need to allocate space here - we will always |
| 1291 | * come back to writepage in that case. |
| 1292 | */ |
| 1293 | dirty = xfs_page_state_convert(inode, page, &wbc, 0, 0); |
| 1294 | if (dirty == 0 && !unwritten) |
| 1295 | goto free_buffers; |
| 1296 | return 0; |
| 1297 | |
| 1298 | free_buffers: |
| 1299 | return try_to_free_buffers(page); |
| 1300 | } |
| 1301 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1302 | STATIC int |
Nathan Scott | c253666 | 2006-03-29 10:44:40 +1000 | [diff] [blame] | 1303 | __xfs_get_blocks( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1304 | struct inode *inode, |
| 1305 | sector_t iblock, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1306 | struct buffer_head *bh_result, |
| 1307 | int create, |
| 1308 | int direct, |
| 1309 | bmapi_flags_t flags) |
| 1310 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1311 | xfs_iomap_t iomap; |
Nathan Scott | fdc7ed7 | 2005-11-02 15:13:13 +1100 | [diff] [blame] | 1312 | xfs_off_t offset; |
| 1313 | ssize_t size; |
Nathan Scott | c253666 | 2006-03-29 10:44:40 +1000 | [diff] [blame] | 1314 | int niomap = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1315 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1316 | |
Nathan Scott | fdc7ed7 | 2005-11-02 15:13:13 +1100 | [diff] [blame] | 1317 | offset = (xfs_off_t)iblock << inode->i_blkbits; |
Nathan Scott | c253666 | 2006-03-29 10:44:40 +1000 | [diff] [blame] | 1318 | ASSERT(bh_result->b_size >= (1 << inode->i_blkbits)); |
| 1319 | size = bh_result->b_size; |
Lachlan McIlroy | 364f358 | 2008-09-17 16:50:14 +1000 | [diff] [blame] | 1320 | |
| 1321 | if (!create && direct && offset >= i_size_read(inode)) |
| 1322 | return 0; |
| 1323 | |
Lachlan McIlroy | 541d7d3 | 2007-10-11 17:34:33 +1000 | [diff] [blame] | 1324 | error = xfs_iomap(XFS_I(inode), offset, size, |
Nathan Scott | 67fcaa7 | 2006-06-09 17:00:52 +1000 | [diff] [blame] | 1325 | create ? flags : BMAPI_READ, &iomap, &niomap); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1326 | if (error) |
| 1327 | return -error; |
Nathan Scott | c253666 | 2006-03-29 10:44:40 +1000 | [diff] [blame] | 1328 | if (niomap == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1329 | return 0; |
| 1330 | |
| 1331 | if (iomap.iomap_bn != IOMAP_DADDR_NULL) { |
Nathan Scott | 87cbc49 | 2006-03-14 13:26:43 +1100 | [diff] [blame] | 1332 | /* |
| 1333 | * For unwritten extents do not report a disk address on |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1334 | * the read case (treat as if we're reading into a hole). |
| 1335 | */ |
| 1336 | if (create || !(iomap.iomap_flags & IOMAP_UNWRITTEN)) { |
Nathan Scott | 87cbc49 | 2006-03-14 13:26:43 +1100 | [diff] [blame] | 1337 | xfs_map_buffer(bh_result, &iomap, offset, |
| 1338 | inode->i_blkbits); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1339 | } |
| 1340 | if (create && (iomap.iomap_flags & IOMAP_UNWRITTEN)) { |
| 1341 | if (direct) |
| 1342 | bh_result->b_private = inode; |
| 1343 | set_buffer_unwritten(bh_result); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1344 | } |
| 1345 | } |
| 1346 | |
Nathan Scott | c253666 | 2006-03-29 10:44:40 +1000 | [diff] [blame] | 1347 | /* |
| 1348 | * If this is a realtime file, data may be on a different device. |
| 1349 | * to that pointed to from the buffer_head b_bdev currently. |
| 1350 | */ |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 1351 | bh_result->b_bdev = iomap.iomap_target->bt_bdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1352 | |
Nathan Scott | c253666 | 2006-03-29 10:44:40 +1000 | [diff] [blame] | 1353 | /* |
David Chinner | 549054a | 2007-02-10 18:36:35 +1100 | [diff] [blame] | 1354 | * If we previously allocated a block out beyond eof and we are now |
| 1355 | * coming back to use it then we will need to flag it as new even if it |
| 1356 | * has a disk address. |
| 1357 | * |
| 1358 | * With sub-block writes into unwritten extents we also need to mark |
| 1359 | * the buffer as new so that the unwritten parts of the buffer gets |
| 1360 | * correctly zeroed. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1361 | */ |
| 1362 | if (create && |
| 1363 | ((!buffer_mapped(bh_result) && !buffer_uptodate(bh_result)) || |
David Chinner | 549054a | 2007-02-10 18:36:35 +1100 | [diff] [blame] | 1364 | (offset >= i_size_read(inode)) || |
| 1365 | (iomap.iomap_flags & (IOMAP_NEW|IOMAP_UNWRITTEN)))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1366 | set_buffer_new(bh_result); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1367 | |
| 1368 | if (iomap.iomap_flags & IOMAP_DELAY) { |
| 1369 | BUG_ON(direct); |
| 1370 | if (create) { |
| 1371 | set_buffer_uptodate(bh_result); |
| 1372 | set_buffer_mapped(bh_result); |
| 1373 | set_buffer_delay(bh_result); |
| 1374 | } |
| 1375 | } |
| 1376 | |
Nathan Scott | c253666 | 2006-03-29 10:44:40 +1000 | [diff] [blame] | 1377 | if (direct || size > (1 << inode->i_blkbits)) { |
Nathan Scott | fdc7ed7 | 2005-11-02 15:13:13 +1100 | [diff] [blame] | 1378 | ASSERT(iomap.iomap_bsize - iomap.iomap_delta > 0); |
| 1379 | offset = min_t(xfs_off_t, |
Nathan Scott | c253666 | 2006-03-29 10:44:40 +1000 | [diff] [blame] | 1380 | iomap.iomap_bsize - iomap.iomap_delta, size); |
| 1381 | bh_result->b_size = (ssize_t)min_t(xfs_off_t, LONG_MAX, offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1382 | } |
| 1383 | |
| 1384 | return 0; |
| 1385 | } |
| 1386 | |
| 1387 | int |
Nathan Scott | c253666 | 2006-03-29 10:44:40 +1000 | [diff] [blame] | 1388 | xfs_get_blocks( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1389 | struct inode *inode, |
| 1390 | sector_t iblock, |
| 1391 | struct buffer_head *bh_result, |
| 1392 | int create) |
| 1393 | { |
Nathan Scott | c253666 | 2006-03-29 10:44:40 +1000 | [diff] [blame] | 1394 | return __xfs_get_blocks(inode, iblock, |
Badari Pulavarty | fa30bd0 | 2006-03-26 01:38:01 -0800 | [diff] [blame] | 1395 | bh_result, create, 0, BMAPI_WRITE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1396 | } |
| 1397 | |
| 1398 | STATIC int |
Nathan Scott | e4c573b | 2006-03-14 13:54:26 +1100 | [diff] [blame] | 1399 | xfs_get_blocks_direct( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1400 | struct inode *inode, |
| 1401 | sector_t iblock, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1402 | struct buffer_head *bh_result, |
| 1403 | int create) |
| 1404 | { |
Nathan Scott | c253666 | 2006-03-29 10:44:40 +1000 | [diff] [blame] | 1405 | return __xfs_get_blocks(inode, iblock, |
Badari Pulavarty | 1d8fa7a | 2006-03-26 01:38:02 -0800 | [diff] [blame] | 1406 | bh_result, create, 1, BMAPI_WRITE|BMAPI_DIRECT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1407 | } |
| 1408 | |
Christoph Hellwig | f097386 | 2005-09-05 08:22:52 +1000 | [diff] [blame] | 1409 | STATIC void |
Nathan Scott | e4c573b | 2006-03-14 13:54:26 +1100 | [diff] [blame] | 1410 | xfs_end_io_direct( |
Christoph Hellwig | f097386 | 2005-09-05 08:22:52 +1000 | [diff] [blame] | 1411 | struct kiocb *iocb, |
| 1412 | loff_t offset, |
| 1413 | ssize_t size, |
| 1414 | void *private) |
| 1415 | { |
| 1416 | xfs_ioend_t *ioend = iocb->private; |
| 1417 | |
| 1418 | /* |
| 1419 | * Non-NULL private data means we need to issue a transaction to |
| 1420 | * convert a range from unwritten to written extents. This needs |
Nathan Scott | c41564b | 2006-03-29 08:55:14 +1000 | [diff] [blame] | 1421 | * to happen from process context but aio+dio I/O completion |
Christoph Hellwig | f097386 | 2005-09-05 08:22:52 +1000 | [diff] [blame] | 1422 | * happens from irq context so we need to defer it to a workqueue. |
Nathan Scott | c41564b | 2006-03-29 08:55:14 +1000 | [diff] [blame] | 1423 | * This is not necessary for synchronous direct I/O, but we do |
Christoph Hellwig | f097386 | 2005-09-05 08:22:52 +1000 | [diff] [blame] | 1424 | * it anyway to keep the code uniform and simpler. |
| 1425 | * |
David Chinner | e927af9 | 2007-06-05 16:24:36 +1000 | [diff] [blame] | 1426 | * Well, if only it were that simple. Because synchronous direct I/O |
| 1427 | * requires extent conversion to occur *before* we return to userspace, |
| 1428 | * we have to wait for extent conversion to complete. Look at the |
| 1429 | * iocb that has been passed to us to determine if this is AIO or |
| 1430 | * not. If it is synchronous, tell xfs_finish_ioend() to kick the |
| 1431 | * workqueue and wait for it to complete. |
| 1432 | * |
Christoph Hellwig | f097386 | 2005-09-05 08:22:52 +1000 | [diff] [blame] | 1433 | * The core direct I/O code might be changed to always call the |
| 1434 | * completion handler in the future, in which case all this can |
| 1435 | * go away. |
| 1436 | */ |
Lachlan McIlroy | ba87ea6 | 2007-05-08 13:49:46 +1000 | [diff] [blame] | 1437 | ioend->io_offset = offset; |
| 1438 | ioend->io_size = size; |
| 1439 | if (ioend->io_type == IOMAP_READ) { |
David Chinner | e927af9 | 2007-06-05 16:24:36 +1000 | [diff] [blame] | 1440 | xfs_finish_ioend(ioend, 0); |
Lachlan McIlroy | ba87ea6 | 2007-05-08 13:49:46 +1000 | [diff] [blame] | 1441 | } else if (private && size > 0) { |
David Chinner | e927af9 | 2007-06-05 16:24:36 +1000 | [diff] [blame] | 1442 | xfs_finish_ioend(ioend, is_sync_kiocb(iocb)); |
Christoph Hellwig | f097386 | 2005-09-05 08:22:52 +1000 | [diff] [blame] | 1443 | } else { |
Lachlan McIlroy | ba87ea6 | 2007-05-08 13:49:46 +1000 | [diff] [blame] | 1444 | /* |
| 1445 | * A direct I/O write ioend starts it's life in unwritten |
| 1446 | * state in case they map an unwritten extent. This write |
| 1447 | * didn't map an unwritten extent so switch it's completion |
| 1448 | * handler. |
| 1449 | */ |
Christoph Hellwig | 5ec4fab | 2009-10-30 09:11:47 +0000 | [diff] [blame] | 1450 | ioend->io_type = IOMAP_NEW; |
David Chinner | e927af9 | 2007-06-05 16:24:36 +1000 | [diff] [blame] | 1451 | xfs_finish_ioend(ioend, 0); |
Christoph Hellwig | f097386 | 2005-09-05 08:22:52 +1000 | [diff] [blame] | 1452 | } |
| 1453 | |
| 1454 | /* |
Nathan Scott | c41564b | 2006-03-29 08:55:14 +1000 | [diff] [blame] | 1455 | * blockdev_direct_IO can return an error even after the I/O |
Christoph Hellwig | f097386 | 2005-09-05 08:22:52 +1000 | [diff] [blame] | 1456 | * completion handler was called. Thus we need to protect |
| 1457 | * against double-freeing. |
| 1458 | */ |
| 1459 | iocb->private = NULL; |
| 1460 | } |
| 1461 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1462 | STATIC ssize_t |
Nathan Scott | e4c573b | 2006-03-14 13:54:26 +1100 | [diff] [blame] | 1463 | xfs_vm_direct_IO( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1464 | int rw, |
| 1465 | struct kiocb *iocb, |
| 1466 | const struct iovec *iov, |
| 1467 | loff_t offset, |
| 1468 | unsigned long nr_segs) |
| 1469 | { |
| 1470 | struct file *file = iocb->ki_filp; |
| 1471 | struct inode *inode = file->f_mapping->host; |
Christoph Hellwig | 6214ed4 | 2007-09-14 15:23:17 +1000 | [diff] [blame] | 1472 | struct block_device *bdev; |
Christoph Hellwig | f097386 | 2005-09-05 08:22:52 +1000 | [diff] [blame] | 1473 | ssize_t ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1474 | |
Christoph Hellwig | 6214ed4 | 2007-09-14 15:23:17 +1000 | [diff] [blame] | 1475 | bdev = xfs_find_bdev_for_inode(XFS_I(inode)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1476 | |
Christoph Hellwig | 5fe878a | 2009-12-15 16:47:50 -0800 | [diff] [blame] | 1477 | iocb->private = xfs_alloc_ioend(inode, rw == WRITE ? |
| 1478 | IOMAP_UNWRITTEN : IOMAP_READ); |
| 1479 | |
| 1480 | ret = blockdev_direct_IO_no_locking(rw, iocb, inode, bdev, iov, |
| 1481 | offset, nr_segs, |
| 1482 | xfs_get_blocks_direct, |
| 1483 | xfs_end_io_direct); |
Christoph Hellwig | f097386 | 2005-09-05 08:22:52 +1000 | [diff] [blame] | 1484 | |
Zach Brown | 8459d86 | 2006-12-10 02:21:05 -0800 | [diff] [blame] | 1485 | if (unlikely(ret != -EIOCBQUEUED && iocb->private)) |
Christoph Hellwig | f097386 | 2005-09-05 08:22:52 +1000 | [diff] [blame] | 1486 | xfs_destroy_ioend(iocb->private); |
| 1487 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1488 | } |
| 1489 | |
Nathan Scott | f51623b | 2006-03-14 13:26:27 +1100 | [diff] [blame] | 1490 | STATIC int |
Nick Piggin | d79689c | 2007-10-16 01:25:06 -0700 | [diff] [blame] | 1491 | xfs_vm_write_begin( |
Nathan Scott | f51623b | 2006-03-14 13:26:27 +1100 | [diff] [blame] | 1492 | struct file *file, |
Nick Piggin | d79689c | 2007-10-16 01:25:06 -0700 | [diff] [blame] | 1493 | struct address_space *mapping, |
| 1494 | loff_t pos, |
| 1495 | unsigned len, |
| 1496 | unsigned flags, |
| 1497 | struct page **pagep, |
| 1498 | void **fsdata) |
Nathan Scott | f51623b | 2006-03-14 13:26:27 +1100 | [diff] [blame] | 1499 | { |
Nick Piggin | d79689c | 2007-10-16 01:25:06 -0700 | [diff] [blame] | 1500 | *pagep = NULL; |
| 1501 | return block_write_begin(file, mapping, pos, len, flags, pagep, fsdata, |
| 1502 | xfs_get_blocks); |
Nathan Scott | f51623b | 2006-03-14 13:26:27 +1100 | [diff] [blame] | 1503 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1504 | |
| 1505 | STATIC sector_t |
Nathan Scott | e4c573b | 2006-03-14 13:54:26 +1100 | [diff] [blame] | 1506 | xfs_vm_bmap( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1507 | struct address_space *mapping, |
| 1508 | sector_t block) |
| 1509 | { |
| 1510 | struct inode *inode = (struct inode *)mapping->host; |
Christoph Hellwig | 739bfb2 | 2007-08-29 10:58:01 +1000 | [diff] [blame] | 1511 | struct xfs_inode *ip = XFS_I(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1512 | |
Lachlan McIlroy | cf441ee | 2008-02-07 16:42:19 +1100 | [diff] [blame] | 1513 | xfs_itrace_entry(XFS_I(inode)); |
Christoph Hellwig | 126468b | 2008-03-06 13:44:57 +1100 | [diff] [blame] | 1514 | xfs_ilock(ip, XFS_IOLOCK_SHARED); |
Christoph Hellwig | 739bfb2 | 2007-08-29 10:58:01 +1000 | [diff] [blame] | 1515 | xfs_flush_pages(ip, (xfs_off_t)0, -1, 0, FI_REMAPF); |
Christoph Hellwig | 126468b | 2008-03-06 13:44:57 +1100 | [diff] [blame] | 1516 | xfs_iunlock(ip, XFS_IOLOCK_SHARED); |
Nathan Scott | c253666 | 2006-03-29 10:44:40 +1000 | [diff] [blame] | 1517 | return generic_block_bmap(mapping, block, xfs_get_blocks); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1518 | } |
| 1519 | |
| 1520 | STATIC int |
Nathan Scott | e4c573b | 2006-03-14 13:54:26 +1100 | [diff] [blame] | 1521 | xfs_vm_readpage( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1522 | struct file *unused, |
| 1523 | struct page *page) |
| 1524 | { |
Nathan Scott | c253666 | 2006-03-29 10:44:40 +1000 | [diff] [blame] | 1525 | return mpage_readpage(page, xfs_get_blocks); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1526 | } |
| 1527 | |
| 1528 | STATIC int |
Nathan Scott | e4c573b | 2006-03-14 13:54:26 +1100 | [diff] [blame] | 1529 | xfs_vm_readpages( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1530 | struct file *unused, |
| 1531 | struct address_space *mapping, |
| 1532 | struct list_head *pages, |
| 1533 | unsigned nr_pages) |
| 1534 | { |
Nathan Scott | c253666 | 2006-03-29 10:44:40 +1000 | [diff] [blame] | 1535 | return mpage_readpages(mapping, pages, nr_pages, xfs_get_blocks); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1536 | } |
| 1537 | |
NeilBrown | 2ff28e2 | 2006-03-26 01:37:18 -0800 | [diff] [blame] | 1538 | STATIC void |
Nathan Scott | 238f4c5 | 2006-03-17 17:26:25 +1100 | [diff] [blame] | 1539 | xfs_vm_invalidatepage( |
Nathan Scott | bcec2b7 | 2005-09-02 16:40:17 +1000 | [diff] [blame] | 1540 | struct page *page, |
| 1541 | unsigned long offset) |
| 1542 | { |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 1543 | trace_xfs_invalidatepage(page->mapping->host, page, offset); |
NeilBrown | 2ff28e2 | 2006-03-26 01:37:18 -0800 | [diff] [blame] | 1544 | block_invalidatepage(page, offset); |
Nathan Scott | bcec2b7 | 2005-09-02 16:40:17 +1000 | [diff] [blame] | 1545 | } |
| 1546 | |
Christoph Hellwig | f5e54d6 | 2006-06-28 04:26:44 -0700 | [diff] [blame] | 1547 | const struct address_space_operations xfs_address_space_operations = { |
Nathan Scott | e4c573b | 2006-03-14 13:54:26 +1100 | [diff] [blame] | 1548 | .readpage = xfs_vm_readpage, |
| 1549 | .readpages = xfs_vm_readpages, |
| 1550 | .writepage = xfs_vm_writepage, |
Nathan Scott | 7d4fb40 | 2006-06-09 15:27:16 +1000 | [diff] [blame] | 1551 | .writepages = xfs_vm_writepages, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1552 | .sync_page = block_sync_page, |
Nathan Scott | 238f4c5 | 2006-03-17 17:26:25 +1100 | [diff] [blame] | 1553 | .releasepage = xfs_vm_releasepage, |
| 1554 | .invalidatepage = xfs_vm_invalidatepage, |
Nick Piggin | d79689c | 2007-10-16 01:25:06 -0700 | [diff] [blame] | 1555 | .write_begin = xfs_vm_write_begin, |
| 1556 | .write_end = generic_write_end, |
Nathan Scott | e4c573b | 2006-03-14 13:54:26 +1100 | [diff] [blame] | 1557 | .bmap = xfs_vm_bmap, |
| 1558 | .direct_IO = xfs_vm_direct_IO, |
Christoph Lameter | e965f96 | 2006-02-01 03:05:41 -0800 | [diff] [blame] | 1559 | .migratepage = buffer_migrate_page, |
Hisashi Hifumi | bddaafa | 2009-03-29 09:53:38 +0200 | [diff] [blame] | 1560 | .is_partially_uptodate = block_is_partially_uptodate, |
Andi Kleen | aa261f5 | 2009-09-16 11:50:16 +0200 | [diff] [blame] | 1561 | .error_remove_page = generic_error_remove_page, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1562 | }; |