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_dir.h" |
| 25 | #include "xfs_dir2.h" |
| 26 | #include "xfs_trans.h" |
| 27 | #include "xfs_dmapi.h" |
| 28 | #include "xfs_mount.h" |
| 29 | #include "xfs_bmap_btree.h" |
| 30 | #include "xfs_alloc_btree.h" |
| 31 | #include "xfs_ialloc_btree.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | #include "xfs_dir_sf.h" |
| 33 | #include "xfs_dir2_sf.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 34 | #include "xfs_attr_sf.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #include "xfs_dinode.h" |
| 36 | #include "xfs_inode.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 37 | #include "xfs_alloc.h" |
| 38 | #include "xfs_btree.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | #include "xfs_error.h" |
| 40 | #include "xfs_rw.h" |
| 41 | #include "xfs_iomap.h" |
| 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 | |
Nathan Scott | f51623b | 2006-03-14 13:26:27 +1100 | [diff] [blame] | 46 | STATIC void |
| 47 | xfs_count_page_state( |
| 48 | struct page *page, |
| 49 | int *delalloc, |
| 50 | int *unmapped, |
| 51 | int *unwritten) |
| 52 | { |
| 53 | struct buffer_head *bh, *head; |
| 54 | |
| 55 | *delalloc = *unmapped = *unwritten = 0; |
| 56 | |
| 57 | bh = head = page_buffers(page); |
| 58 | do { |
| 59 | if (buffer_uptodate(bh) && !buffer_mapped(bh)) |
| 60 | (*unmapped) = 1; |
| 61 | else if (buffer_unwritten(bh) && !buffer_delay(bh)) |
| 62 | clear_buffer_unwritten(bh); |
| 63 | else if (buffer_unwritten(bh)) |
| 64 | (*unwritten) = 1; |
| 65 | else if (buffer_delay(bh)) |
| 66 | (*delalloc) = 1; |
| 67 | } while ((bh = bh->b_this_page) != head); |
| 68 | } |
| 69 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | #if defined(XFS_RW_TRACE) |
| 71 | void |
| 72 | xfs_page_trace( |
| 73 | int tag, |
| 74 | struct inode *inode, |
| 75 | struct page *page, |
| 76 | int mask) |
| 77 | { |
| 78 | xfs_inode_t *ip; |
Nathan Scott | ec86dc0 | 2006-03-17 17:25:36 +1100 | [diff] [blame] | 79 | vnode_t *vp = vn_from_inode(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | loff_t isize = i_size_read(inode); |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 81 | loff_t offset = page_offset(page); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | int delalloc = -1, unmapped = -1, unwritten = -1; |
| 83 | |
| 84 | if (page_has_buffers(page)) |
| 85 | xfs_count_page_state(page, &delalloc, &unmapped, &unwritten); |
| 86 | |
Christoph Hellwig | 75e17b3 | 2006-01-11 20:58:44 +1100 | [diff] [blame] | 87 | ip = xfs_vtoi(vp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | if (!ip->i_rwtrace) |
| 89 | return; |
| 90 | |
| 91 | ktrace_enter(ip->i_rwtrace, |
| 92 | (void *)((unsigned long)tag), |
| 93 | (void *)ip, |
| 94 | (void *)inode, |
| 95 | (void *)page, |
| 96 | (void *)((unsigned long)mask), |
| 97 | (void *)((unsigned long)((ip->i_d.di_size >> 32) & 0xffffffff)), |
| 98 | (void *)((unsigned long)(ip->i_d.di_size & 0xffffffff)), |
| 99 | (void *)((unsigned long)((isize >> 32) & 0xffffffff)), |
| 100 | (void *)((unsigned long)(isize & 0xffffffff)), |
| 101 | (void *)((unsigned long)((offset >> 32) & 0xffffffff)), |
| 102 | (void *)((unsigned long)(offset & 0xffffffff)), |
| 103 | (void *)((unsigned long)delalloc), |
| 104 | (void *)((unsigned long)unmapped), |
| 105 | (void *)((unsigned long)unwritten), |
| 106 | (void *)NULL, |
| 107 | (void *)NULL); |
| 108 | } |
| 109 | #else |
| 110 | #define xfs_page_trace(tag, inode, page, mask) |
| 111 | #endif |
| 112 | |
Christoph Hellwig | 0829c36 | 2005-09-02 16:58:49 +1000 | [diff] [blame] | 113 | /* |
| 114 | * Schedule IO completion handling on a xfsdatad if this was |
| 115 | * the final hold on this ioend. |
| 116 | */ |
| 117 | STATIC void |
| 118 | xfs_finish_ioend( |
| 119 | xfs_ioend_t *ioend) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | { |
Christoph Hellwig | 0829c36 | 2005-09-02 16:58:49 +1000 | [diff] [blame] | 121 | if (atomic_dec_and_test(&ioend->io_remaining)) |
| 122 | queue_work(xfsdatad_workqueue, &ioend->io_work); |
| 123 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 125 | /* |
| 126 | * We're now finished for good with this ioend structure. |
| 127 | * Update the page state via the associated buffer_heads, |
| 128 | * release holds on the inode and bio, and finally free |
| 129 | * up memory. Do not use the ioend after this. |
| 130 | */ |
Christoph Hellwig | 0829c36 | 2005-09-02 16:58:49 +1000 | [diff] [blame] | 131 | STATIC void |
| 132 | xfs_destroy_ioend( |
| 133 | xfs_ioend_t *ioend) |
| 134 | { |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 135 | struct buffer_head *bh, *next; |
| 136 | |
| 137 | for (bh = ioend->io_buffer_head; bh; bh = next) { |
| 138 | next = bh->b_private; |
| 139 | bh->b_end_io(bh, ioend->io_uptodate); |
| 140 | } |
| 141 | |
Christoph Hellwig | 0829c36 | 2005-09-02 16:58:49 +1000 | [diff] [blame] | 142 | vn_iowake(ioend->io_vnode); |
| 143 | mempool_free(ioend, xfs_ioend_pool); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | } |
| 145 | |
| 146 | /* |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 147 | * Buffered IO write completion for delayed allocate extents. |
| 148 | * TODO: Update ondisk isize now that we know the file data |
| 149 | * has been flushed (i.e. the notorious "NULL file" problem). |
| 150 | */ |
| 151 | STATIC void |
| 152 | xfs_end_bio_delalloc( |
| 153 | void *data) |
| 154 | { |
| 155 | xfs_ioend_t *ioend = data; |
| 156 | |
| 157 | xfs_destroy_ioend(ioend); |
| 158 | } |
| 159 | |
| 160 | /* |
| 161 | * Buffered IO write completion for regular, written extents. |
| 162 | */ |
| 163 | STATIC void |
| 164 | xfs_end_bio_written( |
| 165 | void *data) |
| 166 | { |
| 167 | xfs_ioend_t *ioend = data; |
| 168 | |
| 169 | xfs_destroy_ioend(ioend); |
| 170 | } |
| 171 | |
| 172 | /* |
| 173 | * IO write completion for unwritten extents. |
| 174 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | * Issue transactions to convert a buffer range from unwritten |
Christoph Hellwig | f097386 | 2005-09-05 08:22:52 +1000 | [diff] [blame] | 176 | * to written extents. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | */ |
| 178 | STATIC void |
Christoph Hellwig | 0829c36 | 2005-09-02 16:58:49 +1000 | [diff] [blame] | 179 | xfs_end_bio_unwritten( |
| 180 | void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | { |
Christoph Hellwig | 0829c36 | 2005-09-02 16:58:49 +1000 | [diff] [blame] | 182 | xfs_ioend_t *ioend = data; |
| 183 | vnode_t *vp = ioend->io_vnode; |
| 184 | xfs_off_t offset = ioend->io_offset; |
| 185 | size_t size = ioend->io_size; |
| 186 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | |
Christoph Hellwig | 0829c36 | 2005-09-02 16:58:49 +1000 | [diff] [blame] | 188 | if (ioend->io_uptodate) |
| 189 | VOP_BMAP(vp, offset, size, BMAPI_UNWRITTEN, NULL, NULL, error); |
| 190 | xfs_destroy_ioend(ioend); |
| 191 | } |
| 192 | |
| 193 | /* |
| 194 | * Allocate and initialise an IO completion structure. |
| 195 | * We need to track unwritten extent write completion here initially. |
| 196 | * We'll need to extend this for updating the ondisk inode size later |
| 197 | * (vs. incore size). |
| 198 | */ |
| 199 | STATIC xfs_ioend_t * |
| 200 | xfs_alloc_ioend( |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 201 | struct inode *inode, |
| 202 | unsigned int type) |
Christoph Hellwig | 0829c36 | 2005-09-02 16:58:49 +1000 | [diff] [blame] | 203 | { |
| 204 | xfs_ioend_t *ioend; |
| 205 | |
| 206 | ioend = mempool_alloc(xfs_ioend_pool, GFP_NOFS); |
| 207 | |
| 208 | /* |
| 209 | * Set the count to 1 initially, which will prevent an I/O |
| 210 | * completion callback from happening before we have started |
| 211 | * all the I/O from calling the completion routine too early. |
| 212 | */ |
| 213 | atomic_set(&ioend->io_remaining, 1); |
| 214 | ioend->io_uptodate = 1; /* cleared if any I/O fails */ |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 215 | ioend->io_list = NULL; |
| 216 | ioend->io_type = type; |
Nathan Scott | ec86dc0 | 2006-03-17 17:25:36 +1100 | [diff] [blame] | 217 | ioend->io_vnode = vn_from_inode(inode); |
Christoph Hellwig | c1a073b | 2005-09-05 08:23:35 +1000 | [diff] [blame] | 218 | ioend->io_buffer_head = NULL; |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 219 | ioend->io_buffer_tail = NULL; |
Christoph Hellwig | 0829c36 | 2005-09-02 16:58:49 +1000 | [diff] [blame] | 220 | atomic_inc(&ioend->io_vnode->v_iocount); |
| 221 | ioend->io_offset = 0; |
| 222 | ioend->io_size = 0; |
| 223 | |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 224 | if (type == IOMAP_UNWRITTEN) |
| 225 | INIT_WORK(&ioend->io_work, xfs_end_bio_unwritten, ioend); |
| 226 | else if (type == IOMAP_DELAY) |
| 227 | INIT_WORK(&ioend->io_work, xfs_end_bio_delalloc, ioend); |
| 228 | else |
| 229 | INIT_WORK(&ioend->io_work, xfs_end_bio_written, ioend); |
Christoph Hellwig | 0829c36 | 2005-09-02 16:58:49 +1000 | [diff] [blame] | 230 | |
| 231 | return ioend; |
| 232 | } |
| 233 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | STATIC int |
| 235 | xfs_map_blocks( |
| 236 | struct inode *inode, |
| 237 | loff_t offset, |
| 238 | ssize_t count, |
| 239 | xfs_iomap_t *mapp, |
| 240 | int flags) |
| 241 | { |
Nathan Scott | ec86dc0 | 2006-03-17 17:25:36 +1100 | [diff] [blame] | 242 | vnode_t *vp = vn_from_inode(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | int error, nmaps = 1; |
| 244 | |
| 245 | VOP_BMAP(vp, offset, count, flags, mapp, &nmaps, error); |
| 246 | if (!error && (flags & (BMAPI_WRITE|BMAPI_ALLOCATE))) |
| 247 | VMODIFY(vp); |
| 248 | return -error; |
| 249 | } |
| 250 | |
Christoph Hellwig | 1defeac | 2006-01-11 20:48:33 +1100 | [diff] [blame] | 251 | STATIC inline int |
| 252 | xfs_iomap_valid( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | xfs_iomap_t *iomapp, |
Christoph Hellwig | 1defeac | 2006-01-11 20:48:33 +1100 | [diff] [blame] | 254 | loff_t offset) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | { |
Christoph Hellwig | 1defeac | 2006-01-11 20:48:33 +1100 | [diff] [blame] | 256 | return offset >= iomapp->iomap_offset && |
| 257 | offset < iomapp->iomap_offset + iomapp->iomap_bsize; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | } |
| 259 | |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 260 | /* |
| 261 | * BIO completion handler for buffered IO. |
| 262 | */ |
| 263 | STATIC int |
| 264 | xfs_end_bio( |
| 265 | struct bio *bio, |
| 266 | unsigned int bytes_done, |
| 267 | int error) |
| 268 | { |
| 269 | xfs_ioend_t *ioend = bio->bi_private; |
| 270 | |
| 271 | if (bio->bi_size) |
| 272 | return 1; |
| 273 | |
| 274 | ASSERT(ioend); |
| 275 | ASSERT(atomic_read(&bio->bi_cnt) >= 1); |
| 276 | |
| 277 | /* Toss bio and pass work off to an xfsdatad thread */ |
| 278 | if (!test_bit(BIO_UPTODATE, &bio->bi_flags)) |
| 279 | ioend->io_uptodate = 0; |
| 280 | bio->bi_private = NULL; |
| 281 | bio->bi_end_io = NULL; |
| 282 | |
| 283 | bio_put(bio); |
| 284 | xfs_finish_ioend(ioend); |
| 285 | return 0; |
| 286 | } |
| 287 | |
| 288 | STATIC void |
| 289 | xfs_submit_ioend_bio( |
| 290 | xfs_ioend_t *ioend, |
| 291 | struct bio *bio) |
| 292 | { |
| 293 | atomic_inc(&ioend->io_remaining); |
| 294 | |
| 295 | bio->bi_private = ioend; |
| 296 | bio->bi_end_io = xfs_end_bio; |
| 297 | |
| 298 | submit_bio(WRITE, bio); |
| 299 | ASSERT(!bio_flagged(bio, BIO_EOPNOTSUPP)); |
| 300 | bio_put(bio); |
| 301 | } |
| 302 | |
| 303 | STATIC struct bio * |
| 304 | xfs_alloc_ioend_bio( |
| 305 | struct buffer_head *bh) |
| 306 | { |
| 307 | struct bio *bio; |
| 308 | int nvecs = bio_get_nr_vecs(bh->b_bdev); |
| 309 | |
| 310 | do { |
| 311 | bio = bio_alloc(GFP_NOIO, nvecs); |
| 312 | nvecs >>= 1; |
| 313 | } while (!bio); |
| 314 | |
| 315 | ASSERT(bio->bi_private == NULL); |
| 316 | bio->bi_sector = bh->b_blocknr * (bh->b_size >> 9); |
| 317 | bio->bi_bdev = bh->b_bdev; |
| 318 | bio_get(bio); |
| 319 | return bio; |
| 320 | } |
| 321 | |
| 322 | STATIC void |
| 323 | xfs_start_buffer_writeback( |
| 324 | struct buffer_head *bh) |
| 325 | { |
| 326 | ASSERT(buffer_mapped(bh)); |
| 327 | ASSERT(buffer_locked(bh)); |
| 328 | ASSERT(!buffer_delay(bh)); |
| 329 | ASSERT(!buffer_unwritten(bh)); |
| 330 | |
| 331 | mark_buffer_async_write(bh); |
| 332 | set_buffer_uptodate(bh); |
| 333 | clear_buffer_dirty(bh); |
| 334 | } |
| 335 | |
| 336 | STATIC void |
| 337 | xfs_start_page_writeback( |
| 338 | struct page *page, |
| 339 | struct writeback_control *wbc, |
| 340 | int clear_dirty, |
| 341 | int buffers) |
| 342 | { |
| 343 | ASSERT(PageLocked(page)); |
| 344 | ASSERT(!PageWriteback(page)); |
| 345 | set_page_writeback(page); |
| 346 | if (clear_dirty) |
| 347 | clear_page_dirty(page); |
| 348 | unlock_page(page); |
| 349 | if (!buffers) { |
| 350 | end_page_writeback(page); |
| 351 | wbc->pages_skipped++; /* We didn't write this page */ |
| 352 | } |
| 353 | } |
| 354 | |
| 355 | static inline int bio_add_buffer(struct bio *bio, struct buffer_head *bh) |
| 356 | { |
| 357 | return bio_add_page(bio, bh->b_page, bh->b_size, bh_offset(bh)); |
| 358 | } |
| 359 | |
| 360 | /* |
David Chinner | d88992f | 2006-01-18 13:38:12 +1100 | [diff] [blame] | 361 | * Submit all of the bios for all of the ioends we have saved up, covering the |
| 362 | * initial writepage page and also any probed pages. |
| 363 | * |
| 364 | * Because we may have multiple ioends spanning a page, we need to start |
| 365 | * writeback on all the buffers before we submit them for I/O. If we mark the |
| 366 | * buffers as we got, then we can end up with a page that only has buffers |
| 367 | * marked async write and I/O complete on can occur before we mark the other |
| 368 | * buffers async write. |
| 369 | * |
| 370 | * The end result of this is that we trip a bug in end_page_writeback() because |
| 371 | * we call it twice for the one page as the code in end_buffer_async_write() |
| 372 | * assumes that all buffers on the page are started at the same time. |
| 373 | * |
| 374 | * The fix is two passes across the ioend list - one to start writeback on the |
| 375 | * bufferheads, and then the second one submit them for I/O. |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 376 | */ |
| 377 | STATIC void |
| 378 | xfs_submit_ioend( |
| 379 | xfs_ioend_t *ioend) |
| 380 | { |
David Chinner | d88992f | 2006-01-18 13:38:12 +1100 | [diff] [blame] | 381 | xfs_ioend_t *head = ioend; |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 382 | xfs_ioend_t *next; |
| 383 | struct buffer_head *bh; |
| 384 | struct bio *bio; |
| 385 | sector_t lastblock = 0; |
| 386 | |
David Chinner | d88992f | 2006-01-18 13:38:12 +1100 | [diff] [blame] | 387 | /* Pass 1 - start writeback */ |
| 388 | do { |
| 389 | next = ioend->io_list; |
| 390 | for (bh = ioend->io_buffer_head; bh; bh = bh->b_private) { |
| 391 | xfs_start_buffer_writeback(bh); |
| 392 | } |
| 393 | } while ((ioend = next) != NULL); |
| 394 | |
| 395 | /* Pass 2 - submit I/O */ |
| 396 | ioend = head; |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 397 | do { |
| 398 | next = ioend->io_list; |
| 399 | bio = NULL; |
| 400 | |
| 401 | for (bh = ioend->io_buffer_head; bh; bh = bh->b_private) { |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 402 | |
| 403 | if (!bio) { |
| 404 | retry: |
| 405 | bio = xfs_alloc_ioend_bio(bh); |
| 406 | } else if (bh->b_blocknr != lastblock + 1) { |
| 407 | xfs_submit_ioend_bio(ioend, bio); |
| 408 | goto retry; |
| 409 | } |
| 410 | |
| 411 | if (bio_add_buffer(bio, bh) != bh->b_size) { |
| 412 | xfs_submit_ioend_bio(ioend, bio); |
| 413 | goto retry; |
| 414 | } |
| 415 | |
| 416 | lastblock = bh->b_blocknr; |
| 417 | } |
| 418 | if (bio) |
| 419 | xfs_submit_ioend_bio(ioend, bio); |
| 420 | xfs_finish_ioend(ioend); |
| 421 | } while ((ioend = next) != NULL); |
| 422 | } |
| 423 | |
| 424 | /* |
| 425 | * Cancel submission of all buffer_heads so far in this endio. |
| 426 | * Toss the endio too. Only ever called for the initial page |
| 427 | * in a writepage request, so only ever one page. |
| 428 | */ |
| 429 | STATIC void |
| 430 | xfs_cancel_ioend( |
| 431 | xfs_ioend_t *ioend) |
| 432 | { |
| 433 | xfs_ioend_t *next; |
| 434 | struct buffer_head *bh, *next_bh; |
| 435 | |
| 436 | do { |
| 437 | next = ioend->io_list; |
| 438 | bh = ioend->io_buffer_head; |
| 439 | do { |
| 440 | next_bh = bh->b_private; |
| 441 | clear_buffer_async_write(bh); |
| 442 | unlock_buffer(bh); |
| 443 | } while ((bh = next_bh) != NULL); |
| 444 | |
| 445 | vn_iowake(ioend->io_vnode); |
| 446 | mempool_free(ioend, xfs_ioend_pool); |
| 447 | } while ((ioend = next) != NULL); |
| 448 | } |
| 449 | |
| 450 | /* |
| 451 | * Test to see if we've been building up a completion structure for |
| 452 | * earlier buffers -- if so, we try to append to this ioend if we |
| 453 | * can, otherwise we finish off any current ioend and start another. |
| 454 | * Return true if we've finished the given ioend. |
| 455 | */ |
| 456 | STATIC void |
| 457 | xfs_add_to_ioend( |
| 458 | struct inode *inode, |
| 459 | struct buffer_head *bh, |
Christoph Hellwig | 7336cea | 2006-01-11 20:49:16 +1100 | [diff] [blame] | 460 | xfs_off_t offset, |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 461 | unsigned int type, |
| 462 | xfs_ioend_t **result, |
| 463 | int need_ioend) |
| 464 | { |
| 465 | xfs_ioend_t *ioend = *result; |
| 466 | |
| 467 | if (!ioend || need_ioend || type != ioend->io_type) { |
| 468 | xfs_ioend_t *previous = *result; |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 469 | |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 470 | ioend = xfs_alloc_ioend(inode, type); |
| 471 | ioend->io_offset = offset; |
| 472 | ioend->io_buffer_head = bh; |
| 473 | ioend->io_buffer_tail = bh; |
| 474 | if (previous) |
| 475 | previous->io_list = ioend; |
| 476 | *result = ioend; |
| 477 | } else { |
| 478 | ioend->io_buffer_tail->b_private = bh; |
| 479 | ioend->io_buffer_tail = bh; |
| 480 | } |
| 481 | |
| 482 | bh->b_private = NULL; |
| 483 | ioend->io_size += bh->b_size; |
| 484 | } |
| 485 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 486 | STATIC void |
Nathan Scott | 87cbc49 | 2006-03-14 13:26:43 +1100 | [diff] [blame] | 487 | xfs_map_buffer( |
| 488 | struct buffer_head *bh, |
| 489 | xfs_iomap_t *mp, |
| 490 | xfs_off_t offset, |
| 491 | uint block_bits) |
| 492 | { |
| 493 | sector_t bn; |
| 494 | |
| 495 | ASSERT(mp->iomap_bn != IOMAP_DADDR_NULL); |
| 496 | |
| 497 | bn = (mp->iomap_bn >> (block_bits - BBSHIFT)) + |
| 498 | ((offset - mp->iomap_offset) >> block_bits); |
| 499 | |
| 500 | ASSERT(bn || (mp->iomap_flags & IOMAP_REALTIME)); |
| 501 | |
| 502 | bh->b_blocknr = bn; |
| 503 | set_buffer_mapped(bh); |
| 504 | } |
| 505 | |
| 506 | STATIC void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 507 | xfs_map_at_offset( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | struct buffer_head *bh, |
Christoph Hellwig | 1defeac | 2006-01-11 20:48:33 +1100 | [diff] [blame] | 509 | loff_t offset, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 510 | int block_bits, |
Christoph Hellwig | 1defeac | 2006-01-11 20:48:33 +1100 | [diff] [blame] | 511 | xfs_iomap_t *iomapp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | ASSERT(!(iomapp->iomap_flags & IOMAP_HOLE)); |
| 514 | ASSERT(!(iomapp->iomap_flags & IOMAP_DELAY)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | |
| 516 | lock_buffer(bh); |
Nathan Scott | 87cbc49 | 2006-03-14 13:26:43 +1100 | [diff] [blame] | 517 | xfs_map_buffer(bh, iomapp, offset, block_bits); |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 518 | bh->b_bdev = iomapp->iomap_target->bt_bdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | set_buffer_mapped(bh); |
| 520 | clear_buffer_delay(bh); |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 521 | clear_buffer_unwritten(bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | } |
| 523 | |
| 524 | /* |
Christoph Hellwig | 6c4fe19 | 2006-01-11 20:49:28 +1100 | [diff] [blame] | 525 | * Look for a page at index that is suitable for clustering. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | */ |
| 527 | STATIC unsigned int |
Christoph Hellwig | 6c4fe19 | 2006-01-11 20:49:28 +1100 | [diff] [blame] | 528 | xfs_probe_page( |
Christoph Hellwig | 10ce444 | 2006-01-11 20:48:14 +1100 | [diff] [blame] | 529 | struct page *page, |
Christoph Hellwig | 6c4fe19 | 2006-01-11 20:49:28 +1100 | [diff] [blame] | 530 | unsigned int pg_offset, |
| 531 | int mapped) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 532 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 533 | int ret = 0; |
| 534 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 535 | if (PageWriteback(page)) |
Christoph Hellwig | 10ce444 | 2006-01-11 20:48:14 +1100 | [diff] [blame] | 536 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | |
| 538 | if (page->mapping && PageDirty(page)) { |
| 539 | if (page_has_buffers(page)) { |
| 540 | struct buffer_head *bh, *head; |
| 541 | |
| 542 | bh = head = page_buffers(page); |
| 543 | do { |
Christoph Hellwig | 6c4fe19 | 2006-01-11 20:49:28 +1100 | [diff] [blame] | 544 | if (!buffer_uptodate(bh)) |
| 545 | break; |
| 546 | if (mapped != buffer_mapped(bh)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | break; |
| 548 | ret += bh->b_size; |
| 549 | if (ret >= pg_offset) |
| 550 | break; |
| 551 | } while ((bh = bh->b_this_page) != head); |
| 552 | } else |
Christoph Hellwig | 6c4fe19 | 2006-01-11 20:49:28 +1100 | [diff] [blame] | 553 | ret = mapped ? 0 : PAGE_CACHE_SIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 554 | } |
| 555 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 556 | return ret; |
| 557 | } |
| 558 | |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 559 | STATIC size_t |
Christoph Hellwig | 6c4fe19 | 2006-01-11 20:49:28 +1100 | [diff] [blame] | 560 | xfs_probe_cluster( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | struct inode *inode, |
| 562 | struct page *startpage, |
| 563 | struct buffer_head *bh, |
Christoph Hellwig | 6c4fe19 | 2006-01-11 20:49:28 +1100 | [diff] [blame] | 564 | struct buffer_head *head, |
| 565 | int mapped) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | { |
Christoph Hellwig | 10ce444 | 2006-01-11 20:48:14 +1100 | [diff] [blame] | 567 | struct pagevec pvec; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | pgoff_t tindex, tlast, tloff; |
Christoph Hellwig | 10ce444 | 2006-01-11 20:48:14 +1100 | [diff] [blame] | 569 | size_t total = 0; |
| 570 | int done = 0, i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | |
| 572 | /* First sum forwards in this page */ |
| 573 | do { |
Eric Sandeen | 2353e8e | 2006-02-28 12:30:30 +1100 | [diff] [blame] | 574 | if (!buffer_uptodate(bh) || (mapped != buffer_mapped(bh))) |
Christoph Hellwig | 10ce444 | 2006-01-11 20:48:14 +1100 | [diff] [blame] | 575 | return total; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | total += bh->b_size; |
| 577 | } while ((bh = bh->b_this_page) != head); |
| 578 | |
Christoph Hellwig | 10ce444 | 2006-01-11 20:48:14 +1100 | [diff] [blame] | 579 | /* if we reached the end of the page, sum forwards in following pages */ |
| 580 | tlast = i_size_read(inode) >> PAGE_CACHE_SHIFT; |
| 581 | tindex = startpage->index + 1; |
| 582 | |
| 583 | /* Prune this back to avoid pathological behavior */ |
| 584 | tloff = min(tlast, startpage->index + 64); |
| 585 | |
| 586 | pagevec_init(&pvec, 0); |
| 587 | while (!done && tindex <= tloff) { |
| 588 | unsigned len = min_t(pgoff_t, PAGEVEC_SIZE, tlast - tindex + 1); |
| 589 | |
| 590 | if (!pagevec_lookup(&pvec, inode->i_mapping, tindex, len)) |
| 591 | break; |
| 592 | |
| 593 | for (i = 0; i < pagevec_count(&pvec); i++) { |
| 594 | struct page *page = pvec.pages[i]; |
| 595 | size_t pg_offset, len = 0; |
| 596 | |
| 597 | if (tindex == tlast) { |
| 598 | pg_offset = |
| 599 | i_size_read(inode) & (PAGE_CACHE_SIZE - 1); |
Christoph Hellwig | 1defeac | 2006-01-11 20:48:33 +1100 | [diff] [blame] | 600 | if (!pg_offset) { |
| 601 | done = 1; |
Christoph Hellwig | 10ce444 | 2006-01-11 20:48:14 +1100 | [diff] [blame] | 602 | break; |
Christoph Hellwig | 1defeac | 2006-01-11 20:48:33 +1100 | [diff] [blame] | 603 | } |
Christoph Hellwig | 10ce444 | 2006-01-11 20:48:14 +1100 | [diff] [blame] | 604 | } else |
| 605 | pg_offset = PAGE_CACHE_SIZE; |
| 606 | |
| 607 | if (page->index == tindex && !TestSetPageLocked(page)) { |
Christoph Hellwig | 6c4fe19 | 2006-01-11 20:49:28 +1100 | [diff] [blame] | 608 | len = xfs_probe_page(page, pg_offset, mapped); |
Christoph Hellwig | 10ce444 | 2006-01-11 20:48:14 +1100 | [diff] [blame] | 609 | unlock_page(page); |
| 610 | } |
| 611 | |
| 612 | if (!len) { |
| 613 | done = 1; |
| 614 | break; |
| 615 | } |
| 616 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 617 | total += len; |
Christoph Hellwig | 1defeac | 2006-01-11 20:48:33 +1100 | [diff] [blame] | 618 | tindex++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 619 | } |
Christoph Hellwig | 10ce444 | 2006-01-11 20:48:14 +1100 | [diff] [blame] | 620 | |
| 621 | pagevec_release(&pvec); |
| 622 | cond_resched(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 623 | } |
Christoph Hellwig | 10ce444 | 2006-01-11 20:48:14 +1100 | [diff] [blame] | 624 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 625 | return total; |
| 626 | } |
| 627 | |
| 628 | /* |
Christoph Hellwig | 10ce444 | 2006-01-11 20:48:14 +1100 | [diff] [blame] | 629 | * Test if a given page is suitable for writing as part of an unwritten |
| 630 | * or delayed allocate extent. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 631 | */ |
Christoph Hellwig | 10ce444 | 2006-01-11 20:48:14 +1100 | [diff] [blame] | 632 | STATIC int |
| 633 | xfs_is_delayed_page( |
| 634 | struct page *page, |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 635 | unsigned int type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 636 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 637 | if (PageWriteback(page)) |
Christoph Hellwig | 10ce444 | 2006-01-11 20:48:14 +1100 | [diff] [blame] | 638 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 639 | |
| 640 | if (page->mapping && page_has_buffers(page)) { |
| 641 | struct buffer_head *bh, *head; |
| 642 | int acceptable = 0; |
| 643 | |
| 644 | bh = head = page_buffers(page); |
| 645 | do { |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 646 | if (buffer_unwritten(bh)) |
| 647 | acceptable = (type == IOMAP_UNWRITTEN); |
| 648 | else if (buffer_delay(bh)) |
| 649 | acceptable = (type == IOMAP_DELAY); |
Christoph Hellwig | 6c4fe19 | 2006-01-11 20:49:28 +1100 | [diff] [blame] | 650 | else if (buffer_mapped(bh)) |
| 651 | acceptable = (type == 0); |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 652 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 653 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 654 | } while ((bh = bh->b_this_page) != head); |
| 655 | |
| 656 | if (acceptable) |
Christoph Hellwig | 10ce444 | 2006-01-11 20:48:14 +1100 | [diff] [blame] | 657 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 658 | } |
| 659 | |
Christoph Hellwig | 10ce444 | 2006-01-11 20:48:14 +1100 | [diff] [blame] | 660 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 661 | } |
| 662 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 663 | /* |
| 664 | * Allocate & map buffers for page given the extent map. Write it out. |
| 665 | * except for the original page of a writepage, this is called on |
| 666 | * delalloc/unwritten pages only, for the original page it is possible |
| 667 | * that the page has no mapping at all. |
| 668 | */ |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 669 | STATIC int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 670 | xfs_convert_page( |
| 671 | struct inode *inode, |
| 672 | struct page *page, |
Christoph Hellwig | 10ce444 | 2006-01-11 20:48:14 +1100 | [diff] [blame] | 673 | loff_t tindex, |
Christoph Hellwig | 1defeac | 2006-01-11 20:48:33 +1100 | [diff] [blame] | 674 | xfs_iomap_t *mp, |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 675 | xfs_ioend_t **ioendp, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 676 | struct writeback_control *wbc, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 677 | int startio, |
| 678 | int all_bh) |
| 679 | { |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 680 | struct buffer_head *bh, *head; |
Christoph Hellwig | 9260dc6 | 2006-01-11 20:48:47 +1100 | [diff] [blame] | 681 | xfs_off_t end_offset; |
| 682 | unsigned long p_offset; |
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 | int bbits = inode->i_blkbits; |
Nathan Scott | 24e17b5 | 2005-05-05 13:33:20 -0700 | [diff] [blame] | 685 | int len, page_dirty; |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 686 | int count = 0, done = 0, uptodate = 1; |
Christoph Hellwig | 9260dc6 | 2006-01-11 20:48:47 +1100 | [diff] [blame] | 687 | xfs_off_t offset = page_offset(page); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 688 | |
Christoph Hellwig | 10ce444 | 2006-01-11 20:48:14 +1100 | [diff] [blame] | 689 | if (page->index != tindex) |
| 690 | goto fail; |
| 691 | if (TestSetPageLocked(page)) |
| 692 | goto fail; |
| 693 | if (PageWriteback(page)) |
| 694 | goto fail_unlock_page; |
| 695 | if (page->mapping != inode->i_mapping) |
| 696 | goto fail_unlock_page; |
| 697 | if (!xfs_is_delayed_page(page, (*ioendp)->io_type)) |
| 698 | goto fail_unlock_page; |
| 699 | |
Nathan Scott | 24e17b5 | 2005-05-05 13:33:20 -0700 | [diff] [blame] | 700 | /* |
| 701 | * page_dirty is initially a count of buffers on the page before |
| 702 | * EOF and is decrememted as we move each into a cleanable state. |
Christoph Hellwig | 9260dc6 | 2006-01-11 20:48:47 +1100 | [diff] [blame] | 703 | * |
| 704 | * Derivation: |
| 705 | * |
| 706 | * End offset is the highest offset that this page should represent. |
| 707 | * If we are on the last page, (end_offset & (PAGE_CACHE_SIZE - 1)) |
| 708 | * will evaluate non-zero and be less than PAGE_CACHE_SIZE and |
| 709 | * hence give us the correct page_dirty count. On any other page, |
| 710 | * it will be zero and in that case we need page_dirty to be the |
| 711 | * count of buffers on the page. |
Nathan Scott | 24e17b5 | 2005-05-05 13:33:20 -0700 | [diff] [blame] | 712 | */ |
Christoph Hellwig | 9260dc6 | 2006-01-11 20:48:47 +1100 | [diff] [blame] | 713 | end_offset = min_t(unsigned long long, |
| 714 | (xfs_off_t)(page->index + 1) << PAGE_CACHE_SHIFT, |
| 715 | i_size_read(inode)); |
| 716 | |
Nathan Scott | 24e17b5 | 2005-05-05 13:33:20 -0700 | [diff] [blame] | 717 | len = 1 << inode->i_blkbits; |
Christoph Hellwig | 9260dc6 | 2006-01-11 20:48:47 +1100 | [diff] [blame] | 718 | p_offset = min_t(unsigned long, end_offset & (PAGE_CACHE_SIZE - 1), |
| 719 | PAGE_CACHE_SIZE); |
| 720 | p_offset = p_offset ? roundup(p_offset, len) : PAGE_CACHE_SIZE; |
| 721 | page_dirty = p_offset / len; |
Nathan Scott | 24e17b5 | 2005-05-05 13:33:20 -0700 | [diff] [blame] | 722 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 723 | bh = head = page_buffers(page); |
| 724 | do { |
Christoph Hellwig | 9260dc6 | 2006-01-11 20:48:47 +1100 | [diff] [blame] | 725 | if (offset >= end_offset) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 726 | break; |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 727 | if (!buffer_uptodate(bh)) |
| 728 | uptodate = 0; |
| 729 | if (!(PageUptodate(page) || buffer_uptodate(bh))) { |
| 730 | done = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 731 | continue; |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 732 | } |
| 733 | |
Christoph Hellwig | 9260dc6 | 2006-01-11 20:48:47 +1100 | [diff] [blame] | 734 | if (buffer_unwritten(bh) || buffer_delay(bh)) { |
| 735 | if (buffer_unwritten(bh)) |
| 736 | type = IOMAP_UNWRITTEN; |
| 737 | else |
| 738 | type = IOMAP_DELAY; |
| 739 | |
| 740 | if (!xfs_iomap_valid(mp, offset)) { |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 741 | done = 1; |
Christoph Hellwig | 9260dc6 | 2006-01-11 20:48:47 +1100 | [diff] [blame] | 742 | continue; |
| 743 | } |
| 744 | |
| 745 | ASSERT(!(mp->iomap_flags & IOMAP_HOLE)); |
| 746 | ASSERT(!(mp->iomap_flags & IOMAP_DELAY)); |
| 747 | |
| 748 | xfs_map_at_offset(bh, offset, bbits, mp); |
| 749 | if (startio) { |
Christoph Hellwig | 7336cea | 2006-01-11 20:49:16 +1100 | [diff] [blame] | 750 | xfs_add_to_ioend(inode, bh, offset, |
Christoph Hellwig | 9260dc6 | 2006-01-11 20:48:47 +1100 | [diff] [blame] | 751 | type, ioendp, done); |
| 752 | } else { |
| 753 | set_buffer_dirty(bh); |
| 754 | unlock_buffer(bh); |
| 755 | mark_buffer_dirty(bh); |
| 756 | } |
| 757 | page_dirty--; |
| 758 | count++; |
| 759 | } else { |
| 760 | type = 0; |
| 761 | if (buffer_mapped(bh) && all_bh && startio) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 762 | lock_buffer(bh); |
Christoph Hellwig | 7336cea | 2006-01-11 20:49:16 +1100 | [diff] [blame] | 763 | xfs_add_to_ioend(inode, bh, offset, |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 764 | type, ioendp, done); |
| 765 | count++; |
Nathan Scott | 24e17b5 | 2005-05-05 13:33:20 -0700 | [diff] [blame] | 766 | page_dirty--; |
Christoph Hellwig | 9260dc6 | 2006-01-11 20:48:47 +1100 | [diff] [blame] | 767 | } else { |
| 768 | done = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 769 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 770 | } |
Christoph Hellwig | 7336cea | 2006-01-11 20:49:16 +1100 | [diff] [blame] | 771 | } while (offset += len, (bh = bh->b_this_page) != head); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 772 | |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 773 | if (uptodate && bh == head) |
| 774 | SetPageUptodate(page); |
| 775 | |
| 776 | if (startio) { |
Christoph Hellwig | f5e596b | 2006-01-11 20:49:42 +1100 | [diff] [blame] | 777 | if (count) { |
| 778 | struct backing_dev_info *bdi; |
| 779 | |
| 780 | bdi = inode->i_mapping->backing_dev_info; |
David Chinner | 9fddaca | 2006-02-07 20:27:24 +1100 | [diff] [blame] | 781 | wbc->nr_to_write--; |
Christoph Hellwig | f5e596b | 2006-01-11 20:49:42 +1100 | [diff] [blame] | 782 | if (bdi_write_congested(bdi)) { |
| 783 | wbc->encountered_congestion = 1; |
| 784 | done = 1; |
David Chinner | 9fddaca | 2006-02-07 20:27:24 +1100 | [diff] [blame] | 785 | } else if (wbc->nr_to_write <= 0) { |
Christoph Hellwig | f5e596b | 2006-01-11 20:49:42 +1100 | [diff] [blame] | 786 | done = 1; |
| 787 | } |
| 788 | } |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 789 | xfs_start_page_writeback(page, wbc, !page_dirty, count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 790 | } |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 791 | |
| 792 | return done; |
Christoph Hellwig | 10ce444 | 2006-01-11 20:48:14 +1100 | [diff] [blame] | 793 | fail_unlock_page: |
| 794 | unlock_page(page); |
| 795 | fail: |
| 796 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 797 | } |
| 798 | |
| 799 | /* |
| 800 | * Convert & write out a cluster of pages in the same extent as defined |
| 801 | * by mp and following the start page. |
| 802 | */ |
| 803 | STATIC void |
| 804 | xfs_cluster_write( |
| 805 | struct inode *inode, |
| 806 | pgoff_t tindex, |
| 807 | xfs_iomap_t *iomapp, |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 808 | xfs_ioend_t **ioendp, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 809 | struct writeback_control *wbc, |
| 810 | int startio, |
| 811 | int all_bh, |
| 812 | pgoff_t tlast) |
| 813 | { |
Christoph Hellwig | 10ce444 | 2006-01-11 20:48:14 +1100 | [diff] [blame] | 814 | struct pagevec pvec; |
| 815 | int done = 0, i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 816 | |
Christoph Hellwig | 10ce444 | 2006-01-11 20:48:14 +1100 | [diff] [blame] | 817 | pagevec_init(&pvec, 0); |
| 818 | while (!done && tindex <= tlast) { |
| 819 | unsigned len = min_t(pgoff_t, PAGEVEC_SIZE, tlast - tindex + 1); |
| 820 | |
| 821 | if (!pagevec_lookup(&pvec, inode->i_mapping, tindex, len)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 822 | break; |
Christoph Hellwig | 10ce444 | 2006-01-11 20:48:14 +1100 | [diff] [blame] | 823 | |
| 824 | for (i = 0; i < pagevec_count(&pvec); i++) { |
| 825 | done = xfs_convert_page(inode, pvec.pages[i], tindex++, |
| 826 | iomapp, ioendp, wbc, startio, all_bh); |
| 827 | if (done) |
| 828 | break; |
| 829 | } |
| 830 | |
| 831 | pagevec_release(&pvec); |
| 832 | cond_resched(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 833 | } |
| 834 | } |
| 835 | |
| 836 | /* |
| 837 | * Calling this without startio set means we are being asked to make a dirty |
| 838 | * page ready for freeing it's buffers. When called with startio set then |
| 839 | * we are coming from writepage. |
| 840 | * |
| 841 | * When called with startio set it is important that we write the WHOLE |
| 842 | * page if possible. |
| 843 | * The bh->b_state's cannot know if any of the blocks or which block for |
| 844 | * that matter are dirty due to mmap writes, and therefore bh uptodate is |
| 845 | * only vaild if the page itself isn't completely uptodate. Some layers |
| 846 | * may clear the page dirty flag prior to calling write page, under the |
| 847 | * assumption the entire page will be written out; by not writing out the |
| 848 | * whole page the page can be reused before all valid dirty data is |
| 849 | * written out. Note: in the case of a page that has been dirty'd by |
| 850 | * mapwrite and but partially setup by block_prepare_write the |
| 851 | * bh->b_states's will not agree and only ones setup by BPW/BCW will have |
| 852 | * valid state, thus the whole page must be written out thing. |
| 853 | */ |
| 854 | |
| 855 | STATIC int |
| 856 | xfs_page_state_convert( |
| 857 | struct inode *inode, |
| 858 | struct page *page, |
| 859 | struct writeback_control *wbc, |
| 860 | int startio, |
| 861 | int unmapped) /* also implies page uptodate */ |
| 862 | { |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 863 | struct buffer_head *bh, *head; |
Christoph Hellwig | 1defeac | 2006-01-11 20:48:33 +1100 | [diff] [blame] | 864 | xfs_iomap_t iomap; |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 865 | xfs_ioend_t *ioend = NULL, *iohead = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 866 | loff_t offset; |
| 867 | unsigned long p_offset = 0; |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 868 | unsigned int type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 869 | __uint64_t end_offset; |
| 870 | pgoff_t end_index, last_index, tlast; |
Christoph Hellwig | d5cb48a | 2006-01-11 20:49:02 +1100 | [diff] [blame] | 871 | ssize_t size, len; |
| 872 | int flags, err, iomap_valid = 0, uptodate = 1; |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 873 | int page_dirty, count = 0, trylock_flag = 0; |
Christoph Hellwig | 6c4fe19 | 2006-01-11 20:49:28 +1100 | [diff] [blame] | 874 | int all_bh = unmapped; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 875 | |
Daniel Moore | 3ba0815 | 2005-05-05 13:31:34 -0700 | [diff] [blame] | 876 | /* wait for other IO threads? */ |
Christoph Hellwig | f5e596b | 2006-01-11 20:49:42 +1100 | [diff] [blame] | 877 | if (startio && (wbc->sync_mode == WB_SYNC_NONE && wbc->nonblocking)) |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 878 | trylock_flag |= BMAPI_TRYLOCK; |
Daniel Moore | 3ba0815 | 2005-05-05 13:31:34 -0700 | [diff] [blame] | 879 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 880 | /* Is this page beyond the end of the file? */ |
| 881 | offset = i_size_read(inode); |
| 882 | end_index = offset >> PAGE_CACHE_SHIFT; |
| 883 | last_index = (offset - 1) >> PAGE_CACHE_SHIFT; |
| 884 | if (page->index >= end_index) { |
| 885 | if ((page->index >= end_index + 1) || |
| 886 | !(i_size_read(inode) & (PAGE_CACHE_SIZE - 1))) { |
Nathan Scott | 19d5bcf | 2005-11-02 15:14:09 +1100 | [diff] [blame] | 887 | if (startio) |
| 888 | unlock_page(page); |
| 889 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 890 | } |
| 891 | } |
| 892 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 893 | /* |
Nathan Scott | 24e17b5 | 2005-05-05 13:33:20 -0700 | [diff] [blame] | 894 | * page_dirty is initially a count of buffers on the page before |
| 895 | * EOF and is decrememted as we move each into a cleanable state. |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 896 | * |
| 897 | * Derivation: |
| 898 | * |
| 899 | * End offset is the highest offset that this page should represent. |
| 900 | * If we are on the last page, (end_offset & (PAGE_CACHE_SIZE - 1)) |
| 901 | * will evaluate non-zero and be less than PAGE_CACHE_SIZE and |
| 902 | * hence give us the correct page_dirty count. On any other page, |
| 903 | * it will be zero and in that case we need page_dirty to be the |
| 904 | * count of buffers on the page. |
| 905 | */ |
| 906 | end_offset = min_t(unsigned long long, |
| 907 | (xfs_off_t)(page->index + 1) << PAGE_CACHE_SHIFT, offset); |
Nathan Scott | 24e17b5 | 2005-05-05 13:33:20 -0700 | [diff] [blame] | 908 | len = 1 << inode->i_blkbits; |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 909 | p_offset = min_t(unsigned long, end_offset & (PAGE_CACHE_SIZE - 1), |
| 910 | PAGE_CACHE_SIZE); |
| 911 | p_offset = p_offset ? roundup(p_offset, len) : PAGE_CACHE_SIZE; |
Nathan Scott | 24e17b5 | 2005-05-05 13:33:20 -0700 | [diff] [blame] | 912 | page_dirty = p_offset / len; |
| 913 | |
Nathan Scott | 24e17b5 | 2005-05-05 13:33:20 -0700 | [diff] [blame] | 914 | bh = head = page_buffers(page); |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 915 | offset = page_offset(page); |
Christoph Hellwig | 6c4fe19 | 2006-01-11 20:49:28 +1100 | [diff] [blame] | 916 | flags = -1; |
| 917 | type = 0; |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 918 | |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 919 | /* TODO: cleanup count and page_dirty */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 920 | |
| 921 | do { |
| 922 | if (offset >= end_offset) |
| 923 | break; |
| 924 | if (!buffer_uptodate(bh)) |
| 925 | uptodate = 0; |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 926 | if (!(PageUptodate(page) || buffer_uptodate(bh)) && !startio) { |
Christoph Hellwig | 1defeac | 2006-01-11 20:48:33 +1100 | [diff] [blame] | 927 | /* |
| 928 | * the iomap is actually still valid, but the ioend |
| 929 | * isn't. shouldn't happen too often. |
| 930 | */ |
| 931 | iomap_valid = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 932 | continue; |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 933 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 934 | |
Christoph Hellwig | 1defeac | 2006-01-11 20:48:33 +1100 | [diff] [blame] | 935 | if (iomap_valid) |
| 936 | iomap_valid = xfs_iomap_valid(&iomap, offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 937 | |
| 938 | /* |
| 939 | * First case, map an unwritten extent and prepare for |
| 940 | * extent state conversion transaction on completion. |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 941 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 942 | * Second case, allocate space for a delalloc buffer. |
| 943 | * We can return EAGAIN here in the release page case. |
Christoph Hellwig | d5cb48a | 2006-01-11 20:49:02 +1100 | [diff] [blame] | 944 | * |
| 945 | * Third case, an unmapped buffer was found, and we are |
| 946 | * in a path where we need to write the whole page out. |
| 947 | */ |
| 948 | if (buffer_unwritten(bh) || buffer_delay(bh) || |
| 949 | ((buffer_uptodate(bh) || PageUptodate(page)) && |
| 950 | !buffer_mapped(bh) && (unmapped || startio))) { |
Christoph Hellwig | 6c4fe19 | 2006-01-11 20:49:28 +1100 | [diff] [blame] | 951 | /* |
| 952 | * Make sure we don't use a read-only iomap |
| 953 | */ |
| 954 | if (flags == BMAPI_READ) |
| 955 | iomap_valid = 0; |
| 956 | |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 957 | if (buffer_unwritten(bh)) { |
| 958 | type = IOMAP_UNWRITTEN; |
| 959 | flags = BMAPI_WRITE|BMAPI_IGNSTATE; |
Christoph Hellwig | d5cb48a | 2006-01-11 20:49:02 +1100 | [diff] [blame] | 960 | } else if (buffer_delay(bh)) { |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 961 | type = IOMAP_DELAY; |
| 962 | flags = BMAPI_ALLOCATE; |
| 963 | if (!startio) |
| 964 | flags |= trylock_flag; |
Christoph Hellwig | d5cb48a | 2006-01-11 20:49:02 +1100 | [diff] [blame] | 965 | } else { |
Christoph Hellwig | 6c4fe19 | 2006-01-11 20:49:28 +1100 | [diff] [blame] | 966 | type = IOMAP_NEW; |
Christoph Hellwig | d5cb48a | 2006-01-11 20:49:02 +1100 | [diff] [blame] | 967 | flags = BMAPI_WRITE|BMAPI_MMAP; |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 968 | } |
| 969 | |
Christoph Hellwig | 1defeac | 2006-01-11 20:48:33 +1100 | [diff] [blame] | 970 | if (!iomap_valid) { |
Christoph Hellwig | 6c4fe19 | 2006-01-11 20:49:28 +1100 | [diff] [blame] | 971 | if (type == IOMAP_NEW) { |
| 972 | size = xfs_probe_cluster(inode, |
| 973 | page, bh, head, 0); |
Christoph Hellwig | d5cb48a | 2006-01-11 20:49:02 +1100 | [diff] [blame] | 974 | } else { |
| 975 | size = len; |
| 976 | } |
| 977 | |
| 978 | err = xfs_map_blocks(inode, offset, size, |
| 979 | &iomap, flags); |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 980 | if (err) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 981 | goto error; |
Christoph Hellwig | 1defeac | 2006-01-11 20:48:33 +1100 | [diff] [blame] | 982 | iomap_valid = xfs_iomap_valid(&iomap, offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 983 | } |
Christoph Hellwig | 1defeac | 2006-01-11 20:48:33 +1100 | [diff] [blame] | 984 | if (iomap_valid) { |
| 985 | xfs_map_at_offset(bh, offset, |
| 986 | inode->i_blkbits, &iomap); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 987 | if (startio) { |
Christoph Hellwig | 7336cea | 2006-01-11 20:49:16 +1100 | [diff] [blame] | 988 | xfs_add_to_ioend(inode, bh, offset, |
Christoph Hellwig | 1defeac | 2006-01-11 20:48:33 +1100 | [diff] [blame] | 989 | type, &ioend, |
| 990 | !iomap_valid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 991 | } else { |
| 992 | set_buffer_dirty(bh); |
| 993 | unlock_buffer(bh); |
| 994 | mark_buffer_dirty(bh); |
| 995 | } |
| 996 | page_dirty--; |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 997 | count++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 998 | } |
Christoph Hellwig | d5cb48a | 2006-01-11 20:49:02 +1100 | [diff] [blame] | 999 | } else if (buffer_uptodate(bh) && startio) { |
Christoph Hellwig | 6c4fe19 | 2006-01-11 20:49:28 +1100 | [diff] [blame] | 1000 | /* |
| 1001 | * we got here because the buffer is already mapped. |
| 1002 | * That means it must already have extents allocated |
| 1003 | * underneath it. Map the extent by reading it. |
| 1004 | */ |
| 1005 | if (!iomap_valid || type != 0) { |
| 1006 | flags = BMAPI_READ; |
| 1007 | size = xfs_probe_cluster(inode, page, bh, |
| 1008 | head, 1); |
| 1009 | err = xfs_map_blocks(inode, offset, size, |
| 1010 | &iomap, flags); |
| 1011 | if (err) |
| 1012 | goto error; |
| 1013 | iomap_valid = xfs_iomap_valid(&iomap, offset); |
| 1014 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1015 | |
Christoph Hellwig | 6c4fe19 | 2006-01-11 20:49:28 +1100 | [diff] [blame] | 1016 | type = 0; |
Christoph Hellwig | d5cb48a | 2006-01-11 20:49:02 +1100 | [diff] [blame] | 1017 | if (!test_and_set_bit(BH_Lock, &bh->b_state)) { |
| 1018 | ASSERT(buffer_mapped(bh)); |
Christoph Hellwig | 6c4fe19 | 2006-01-11 20:49:28 +1100 | [diff] [blame] | 1019 | if (iomap_valid) |
| 1020 | all_bh = 1; |
Christoph Hellwig | 7336cea | 2006-01-11 20:49:16 +1100 | [diff] [blame] | 1021 | xfs_add_to_ioend(inode, bh, offset, type, |
Christoph Hellwig | d5cb48a | 2006-01-11 20:49:02 +1100 | [diff] [blame] | 1022 | &ioend, !iomap_valid); |
| 1023 | page_dirty--; |
| 1024 | count++; |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 1025 | } else { |
Christoph Hellwig | 1defeac | 2006-01-11 20:48:33 +1100 | [diff] [blame] | 1026 | iomap_valid = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1027 | } |
Christoph Hellwig | d5cb48a | 2006-01-11 20:49:02 +1100 | [diff] [blame] | 1028 | } else if ((buffer_uptodate(bh) || PageUptodate(page)) && |
| 1029 | (unmapped || startio)) { |
| 1030 | iomap_valid = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1031 | } |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 1032 | |
| 1033 | if (!iohead) |
| 1034 | iohead = ioend; |
| 1035 | |
| 1036 | } while (offset += len, ((bh = bh->b_this_page) != head)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1037 | |
| 1038 | if (uptodate && bh == head) |
| 1039 | SetPageUptodate(page); |
| 1040 | |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 1041 | if (startio) |
| 1042 | xfs_start_page_writeback(page, wbc, 1, count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1043 | |
Christoph Hellwig | 1defeac | 2006-01-11 20:48:33 +1100 | [diff] [blame] | 1044 | if (ioend && iomap_valid) { |
| 1045 | offset = (iomap.iomap_offset + iomap.iomap_bsize - 1) >> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1046 | PAGE_CACHE_SHIFT; |
Nathan Scott | 775bf6c | 2005-05-05 13:33:01 -0700 | [diff] [blame] | 1047 | tlast = min_t(pgoff_t, offset, last_index); |
Christoph Hellwig | 1defeac | 2006-01-11 20:48:33 +1100 | [diff] [blame] | 1048 | xfs_cluster_write(inode, page->index + 1, &iomap, &ioend, |
Christoph Hellwig | 6c4fe19 | 2006-01-11 20:49:28 +1100 | [diff] [blame] | 1049 | wbc, startio, all_bh, tlast); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1050 | } |
| 1051 | |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 1052 | if (iohead) |
| 1053 | xfs_submit_ioend(iohead); |
| 1054 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1055 | return page_dirty; |
| 1056 | |
| 1057 | error: |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 1058 | if (iohead) |
| 1059 | xfs_cancel_ioend(iohead); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1060 | |
| 1061 | /* |
| 1062 | * If it's delalloc and we have nowhere to put it, |
| 1063 | * throw it away, unless the lower layers told |
| 1064 | * us to try again. |
| 1065 | */ |
| 1066 | if (err != -EAGAIN) { |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 1067 | if (!unmapped) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1068 | block_invalidatepage(page, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1069 | ClearPageUptodate(page); |
| 1070 | } |
| 1071 | return err; |
| 1072 | } |
| 1073 | |
Nathan Scott | f51623b | 2006-03-14 13:26:27 +1100 | [diff] [blame] | 1074 | /* |
| 1075 | * writepage: Called from one of two places: |
| 1076 | * |
| 1077 | * 1. we are flushing a delalloc buffer head. |
| 1078 | * |
| 1079 | * 2. we are writing out a dirty page. Typically the page dirty |
| 1080 | * state is cleared before we get here. In this case is it |
| 1081 | * conceivable we have no buffer heads. |
| 1082 | * |
| 1083 | * For delalloc space on the page we need to allocate space and |
| 1084 | * flush it. For unmapped buffer heads on the page we should |
| 1085 | * allocate space if the page is uptodate. For any other dirty |
| 1086 | * buffer heads on the page we should flush them. |
| 1087 | * |
| 1088 | * If we detect that a transaction would be required to flush |
| 1089 | * the page, we have to check the process flags first, if we |
| 1090 | * are already in a transaction or disk I/O during allocations |
| 1091 | * is off, we need to fail the writepage and redirty the page. |
| 1092 | */ |
| 1093 | |
| 1094 | STATIC int |
Nathan Scott | e4c573b | 2006-03-14 13:54:26 +1100 | [diff] [blame] | 1095 | xfs_vm_writepage( |
Nathan Scott | f51623b | 2006-03-14 13:26:27 +1100 | [diff] [blame] | 1096 | struct page *page, |
| 1097 | struct writeback_control *wbc) |
| 1098 | { |
| 1099 | int error; |
| 1100 | int need_trans; |
| 1101 | int delalloc, unmapped, unwritten; |
| 1102 | struct inode *inode = page->mapping->host; |
| 1103 | |
| 1104 | xfs_page_trace(XFS_WRITEPAGE_ENTER, inode, page, 0); |
| 1105 | |
| 1106 | /* |
| 1107 | * We need a transaction if: |
| 1108 | * 1. There are delalloc buffers on the page |
| 1109 | * 2. The page is uptodate and we have unmapped buffers |
| 1110 | * 3. The page is uptodate and we have no buffers |
| 1111 | * 4. There are unwritten buffers on the page |
| 1112 | */ |
| 1113 | |
| 1114 | if (!page_has_buffers(page)) { |
| 1115 | unmapped = 1; |
| 1116 | need_trans = 1; |
| 1117 | } else { |
| 1118 | xfs_count_page_state(page, &delalloc, &unmapped, &unwritten); |
| 1119 | if (!PageUptodate(page)) |
| 1120 | unmapped = 0; |
| 1121 | need_trans = delalloc + unmapped + unwritten; |
| 1122 | } |
| 1123 | |
| 1124 | /* |
| 1125 | * If we need a transaction and the process flags say |
| 1126 | * we are already in a transaction, or no IO is allowed |
| 1127 | * then mark the page dirty again and leave the page |
| 1128 | * as is. |
| 1129 | */ |
| 1130 | if (PFLAGS_TEST_FSTRANS() && need_trans) |
| 1131 | goto out_fail; |
| 1132 | |
| 1133 | /* |
| 1134 | * Delay hooking up buffer heads until we have |
| 1135 | * made our go/no-go decision. |
| 1136 | */ |
| 1137 | if (!page_has_buffers(page)) |
| 1138 | create_empty_buffers(page, 1 << inode->i_blkbits, 0); |
| 1139 | |
| 1140 | /* |
| 1141 | * Convert delayed allocate, unwritten or unmapped space |
| 1142 | * to real space and flush out to disk. |
| 1143 | */ |
| 1144 | error = xfs_page_state_convert(inode, page, wbc, 1, unmapped); |
| 1145 | if (error == -EAGAIN) |
| 1146 | goto out_fail; |
| 1147 | if (unlikely(error < 0)) |
| 1148 | goto out_unlock; |
| 1149 | |
| 1150 | return 0; |
| 1151 | |
| 1152 | out_fail: |
| 1153 | redirty_page_for_writepage(wbc, page); |
| 1154 | unlock_page(page); |
| 1155 | return 0; |
| 1156 | out_unlock: |
| 1157 | unlock_page(page); |
| 1158 | return error; |
| 1159 | } |
| 1160 | |
| 1161 | /* |
| 1162 | * Called to move a page into cleanable state - and from there |
| 1163 | * to be released. Possibly the page is already clean. We always |
| 1164 | * have buffer heads in this call. |
| 1165 | * |
| 1166 | * Returns 0 if the page is ok to release, 1 otherwise. |
| 1167 | * |
| 1168 | * Possible scenarios are: |
| 1169 | * |
| 1170 | * 1. We are being called to release a page which has been written |
| 1171 | * to via regular I/O. buffer heads will be dirty and possibly |
| 1172 | * delalloc. If no delalloc buffer heads in this case then we |
| 1173 | * can just return zero. |
| 1174 | * |
| 1175 | * 2. We are called to release a page which has been written via |
| 1176 | * mmap, all we need to do is ensure there is no delalloc |
| 1177 | * state in the buffer heads, if not we can let the caller |
| 1178 | * free them and we should come back later via writepage. |
| 1179 | */ |
| 1180 | STATIC int |
Nathan Scott | 238f4c5 | 2006-03-17 17:26:25 +1100 | [diff] [blame^] | 1181 | xfs_vm_releasepage( |
Nathan Scott | f51623b | 2006-03-14 13:26:27 +1100 | [diff] [blame] | 1182 | struct page *page, |
| 1183 | gfp_t gfp_mask) |
| 1184 | { |
| 1185 | struct inode *inode = page->mapping->host; |
| 1186 | int dirty, delalloc, unmapped, unwritten; |
| 1187 | struct writeback_control wbc = { |
| 1188 | .sync_mode = WB_SYNC_ALL, |
| 1189 | .nr_to_write = 1, |
| 1190 | }; |
| 1191 | |
| 1192 | xfs_page_trace(XFS_RELEASEPAGE_ENTER, inode, page, gfp_mask); |
| 1193 | |
Nathan Scott | 238f4c5 | 2006-03-17 17:26:25 +1100 | [diff] [blame^] | 1194 | if (!page_has_buffers(page)) |
| 1195 | return 0; |
| 1196 | |
Nathan Scott | f51623b | 2006-03-14 13:26:27 +1100 | [diff] [blame] | 1197 | xfs_count_page_state(page, &delalloc, &unmapped, &unwritten); |
| 1198 | if (!delalloc && !unwritten) |
| 1199 | goto free_buffers; |
| 1200 | |
| 1201 | if (!(gfp_mask & __GFP_FS)) |
| 1202 | return 0; |
| 1203 | |
| 1204 | /* If we are already inside a transaction or the thread cannot |
| 1205 | * do I/O, we cannot release this page. |
| 1206 | */ |
| 1207 | if (PFLAGS_TEST_FSTRANS()) |
| 1208 | return 0; |
| 1209 | |
| 1210 | /* |
| 1211 | * Convert delalloc space to real space, do not flush the |
| 1212 | * data out to disk, that will be done by the caller. |
| 1213 | * Never need to allocate space here - we will always |
| 1214 | * come back to writepage in that case. |
| 1215 | */ |
| 1216 | dirty = xfs_page_state_convert(inode, page, &wbc, 0, 0); |
| 1217 | if (dirty == 0 && !unwritten) |
| 1218 | goto free_buffers; |
| 1219 | return 0; |
| 1220 | |
| 1221 | free_buffers: |
| 1222 | return try_to_free_buffers(page); |
| 1223 | } |
| 1224 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1225 | STATIC int |
Nathan Scott | e4c573b | 2006-03-14 13:54:26 +1100 | [diff] [blame] | 1226 | __xfs_get_block( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1227 | struct inode *inode, |
| 1228 | sector_t iblock, |
| 1229 | unsigned long blocks, |
| 1230 | struct buffer_head *bh_result, |
| 1231 | int create, |
| 1232 | int direct, |
| 1233 | bmapi_flags_t flags) |
| 1234 | { |
Nathan Scott | ec86dc0 | 2006-03-17 17:25:36 +1100 | [diff] [blame] | 1235 | vnode_t *vp = vn_from_inode(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1236 | xfs_iomap_t iomap; |
Nathan Scott | fdc7ed7 | 2005-11-02 15:13:13 +1100 | [diff] [blame] | 1237 | xfs_off_t offset; |
| 1238 | ssize_t size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1239 | int retpbbm = 1; |
| 1240 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1241 | |
Nathan Scott | fdc7ed7 | 2005-11-02 15:13:13 +1100 | [diff] [blame] | 1242 | offset = (xfs_off_t)iblock << inode->i_blkbits; |
Nathan Scott | a465639 | 2005-11-25 16:41:57 +1100 | [diff] [blame] | 1243 | if (blocks) |
| 1244 | size = (ssize_t) min_t(xfs_off_t, LONG_MAX, |
| 1245 | (xfs_off_t)blocks << inode->i_blkbits); |
| 1246 | else |
| 1247 | size = 1 << inode->i_blkbits; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1248 | |
| 1249 | VOP_BMAP(vp, offset, size, |
| 1250 | create ? flags : BMAPI_READ, &iomap, &retpbbm, error); |
| 1251 | if (error) |
| 1252 | return -error; |
| 1253 | |
| 1254 | if (retpbbm == 0) |
| 1255 | return 0; |
| 1256 | |
| 1257 | if (iomap.iomap_bn != IOMAP_DADDR_NULL) { |
Nathan Scott | 87cbc49 | 2006-03-14 13:26:43 +1100 | [diff] [blame] | 1258 | /* |
| 1259 | * For unwritten extents do not report a disk address on |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1260 | * the read case (treat as if we're reading into a hole). |
| 1261 | */ |
| 1262 | if (create || !(iomap.iomap_flags & IOMAP_UNWRITTEN)) { |
Nathan Scott | 87cbc49 | 2006-03-14 13:26:43 +1100 | [diff] [blame] | 1263 | xfs_map_buffer(bh_result, &iomap, offset, |
| 1264 | inode->i_blkbits); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1265 | } |
| 1266 | if (create && (iomap.iomap_flags & IOMAP_UNWRITTEN)) { |
| 1267 | if (direct) |
| 1268 | bh_result->b_private = inode; |
| 1269 | set_buffer_unwritten(bh_result); |
| 1270 | set_buffer_delay(bh_result); |
| 1271 | } |
| 1272 | } |
| 1273 | |
| 1274 | /* If this is a realtime file, data might be on a new device */ |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 1275 | bh_result->b_bdev = iomap.iomap_target->bt_bdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1276 | |
| 1277 | /* If we previously allocated a block out beyond eof and |
| 1278 | * we are now coming back to use it then we will need to |
| 1279 | * flag it as new even if it has a disk address. |
| 1280 | */ |
| 1281 | if (create && |
| 1282 | ((!buffer_mapped(bh_result) && !buffer_uptodate(bh_result)) || |
Nathan Scott | fdc7ed7 | 2005-11-02 15:13:13 +1100 | [diff] [blame] | 1283 | (offset >= i_size_read(inode)) || (iomap.iomap_flags & IOMAP_NEW))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1284 | set_buffer_new(bh_result); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1285 | |
| 1286 | if (iomap.iomap_flags & IOMAP_DELAY) { |
| 1287 | BUG_ON(direct); |
| 1288 | if (create) { |
| 1289 | set_buffer_uptodate(bh_result); |
| 1290 | set_buffer_mapped(bh_result); |
| 1291 | set_buffer_delay(bh_result); |
| 1292 | } |
| 1293 | } |
| 1294 | |
| 1295 | if (blocks) { |
Nathan Scott | fdc7ed7 | 2005-11-02 15:13:13 +1100 | [diff] [blame] | 1296 | ASSERT(iomap.iomap_bsize - iomap.iomap_delta > 0); |
| 1297 | offset = min_t(xfs_off_t, |
| 1298 | iomap.iomap_bsize - iomap.iomap_delta, |
Nathan Scott | a465639 | 2005-11-25 16:41:57 +1100 | [diff] [blame] | 1299 | (xfs_off_t)blocks << inode->i_blkbits); |
Nathan Scott | fdc7ed7 | 2005-11-02 15:13:13 +1100 | [diff] [blame] | 1300 | bh_result->b_size = (u32) min_t(xfs_off_t, UINT_MAX, offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1301 | } |
| 1302 | |
| 1303 | return 0; |
| 1304 | } |
| 1305 | |
| 1306 | int |
Nathan Scott | e4c573b | 2006-03-14 13:54:26 +1100 | [diff] [blame] | 1307 | xfs_get_block( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1308 | struct inode *inode, |
| 1309 | sector_t iblock, |
| 1310 | struct buffer_head *bh_result, |
| 1311 | int create) |
| 1312 | { |
Nathan Scott | e4c573b | 2006-03-14 13:54:26 +1100 | [diff] [blame] | 1313 | return __xfs_get_block(inode, iblock, 0, bh_result, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1314 | create, 0, BMAPI_WRITE); |
| 1315 | } |
| 1316 | |
| 1317 | STATIC int |
Nathan Scott | e4c573b | 2006-03-14 13:54:26 +1100 | [diff] [blame] | 1318 | xfs_get_blocks_direct( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1319 | struct inode *inode, |
| 1320 | sector_t iblock, |
| 1321 | unsigned long max_blocks, |
| 1322 | struct buffer_head *bh_result, |
| 1323 | int create) |
| 1324 | { |
Nathan Scott | e4c573b | 2006-03-14 13:54:26 +1100 | [diff] [blame] | 1325 | return __xfs_get_block(inode, iblock, max_blocks, bh_result, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1326 | create, 1, BMAPI_WRITE|BMAPI_DIRECT); |
| 1327 | } |
| 1328 | |
Christoph Hellwig | f097386 | 2005-09-05 08:22:52 +1000 | [diff] [blame] | 1329 | STATIC void |
Nathan Scott | e4c573b | 2006-03-14 13:54:26 +1100 | [diff] [blame] | 1330 | xfs_end_io_direct( |
Christoph Hellwig | f097386 | 2005-09-05 08:22:52 +1000 | [diff] [blame] | 1331 | struct kiocb *iocb, |
| 1332 | loff_t offset, |
| 1333 | ssize_t size, |
| 1334 | void *private) |
| 1335 | { |
| 1336 | xfs_ioend_t *ioend = iocb->private; |
| 1337 | |
| 1338 | /* |
| 1339 | * Non-NULL private data means we need to issue a transaction to |
| 1340 | * convert a range from unwritten to written extents. This needs |
| 1341 | * to happen from process contect but aio+dio I/O completion |
| 1342 | * happens from irq context so we need to defer it to a workqueue. |
| 1343 | * This is not nessecary for synchronous direct I/O, but we do |
| 1344 | * it anyway to keep the code uniform and simpler. |
| 1345 | * |
| 1346 | * The core direct I/O code might be changed to always call the |
| 1347 | * completion handler in the future, in which case all this can |
| 1348 | * go away. |
| 1349 | */ |
| 1350 | if (private && size > 0) { |
| 1351 | ioend->io_offset = offset; |
| 1352 | ioend->io_size = size; |
| 1353 | xfs_finish_ioend(ioend); |
| 1354 | } else { |
| 1355 | ASSERT(size >= 0); |
| 1356 | xfs_destroy_ioend(ioend); |
| 1357 | } |
| 1358 | |
| 1359 | /* |
| 1360 | * blockdev_direct_IO can return an error even afer the I/O |
| 1361 | * completion handler was called. Thus we need to protect |
| 1362 | * against double-freeing. |
| 1363 | */ |
| 1364 | iocb->private = NULL; |
| 1365 | } |
| 1366 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1367 | STATIC ssize_t |
Nathan Scott | e4c573b | 2006-03-14 13:54:26 +1100 | [diff] [blame] | 1368 | xfs_vm_direct_IO( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1369 | int rw, |
| 1370 | struct kiocb *iocb, |
| 1371 | const struct iovec *iov, |
| 1372 | loff_t offset, |
| 1373 | unsigned long nr_segs) |
| 1374 | { |
| 1375 | struct file *file = iocb->ki_filp; |
| 1376 | struct inode *inode = file->f_mapping->host; |
Nathan Scott | ec86dc0 | 2006-03-17 17:25:36 +1100 | [diff] [blame] | 1377 | vnode_t *vp = vn_from_inode(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1378 | xfs_iomap_t iomap; |
| 1379 | int maps = 1; |
| 1380 | int error; |
Christoph Hellwig | f097386 | 2005-09-05 08:22:52 +1000 | [diff] [blame] | 1381 | ssize_t ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1382 | |
| 1383 | VOP_BMAP(vp, offset, 0, BMAPI_DEVICE, &iomap, &maps, error); |
| 1384 | if (error) |
| 1385 | return -error; |
| 1386 | |
Christoph Hellwig | f6d6d4f | 2006-01-11 15:40:13 +1100 | [diff] [blame] | 1387 | iocb->private = xfs_alloc_ioend(inode, IOMAP_UNWRITTEN); |
Christoph Hellwig | f097386 | 2005-09-05 08:22:52 +1000 | [diff] [blame] | 1388 | |
| 1389 | ret = blockdev_direct_IO_own_locking(rw, iocb, inode, |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 1390 | iomap.iomap_target->bt_bdev, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1391 | iov, offset, nr_segs, |
Nathan Scott | e4c573b | 2006-03-14 13:54:26 +1100 | [diff] [blame] | 1392 | xfs_get_blocks_direct, |
| 1393 | xfs_end_io_direct); |
Christoph Hellwig | f097386 | 2005-09-05 08:22:52 +1000 | [diff] [blame] | 1394 | |
| 1395 | if (unlikely(ret <= 0 && iocb->private)) |
| 1396 | xfs_destroy_ioend(iocb->private); |
| 1397 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1398 | } |
| 1399 | |
Nathan Scott | f51623b | 2006-03-14 13:26:27 +1100 | [diff] [blame] | 1400 | STATIC int |
Nathan Scott | e4c573b | 2006-03-14 13:54:26 +1100 | [diff] [blame] | 1401 | xfs_vm_prepare_write( |
Nathan Scott | f51623b | 2006-03-14 13:26:27 +1100 | [diff] [blame] | 1402 | struct file *file, |
| 1403 | struct page *page, |
| 1404 | unsigned int from, |
| 1405 | unsigned int to) |
| 1406 | { |
Nathan Scott | e4c573b | 2006-03-14 13:54:26 +1100 | [diff] [blame] | 1407 | return block_prepare_write(page, from, to, xfs_get_block); |
Nathan Scott | f51623b | 2006-03-14 13:26:27 +1100 | [diff] [blame] | 1408 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1409 | |
| 1410 | STATIC sector_t |
Nathan Scott | e4c573b | 2006-03-14 13:54:26 +1100 | [diff] [blame] | 1411 | xfs_vm_bmap( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1412 | struct address_space *mapping, |
| 1413 | sector_t block) |
| 1414 | { |
| 1415 | struct inode *inode = (struct inode *)mapping->host; |
Nathan Scott | ec86dc0 | 2006-03-17 17:25:36 +1100 | [diff] [blame] | 1416 | vnode_t *vp = vn_from_inode(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1417 | int error; |
| 1418 | |
Nathan Scott | e4c573b | 2006-03-14 13:54:26 +1100 | [diff] [blame] | 1419 | vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1420 | |
| 1421 | VOP_RWLOCK(vp, VRWLOCK_READ); |
| 1422 | VOP_FLUSH_PAGES(vp, (xfs_off_t)0, -1, 0, FI_REMAPF, error); |
| 1423 | VOP_RWUNLOCK(vp, VRWLOCK_READ); |
Nathan Scott | e4c573b | 2006-03-14 13:54:26 +1100 | [diff] [blame] | 1424 | return generic_block_bmap(mapping, block, xfs_get_block); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1425 | } |
| 1426 | |
| 1427 | STATIC int |
Nathan Scott | e4c573b | 2006-03-14 13:54:26 +1100 | [diff] [blame] | 1428 | xfs_vm_readpage( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1429 | struct file *unused, |
| 1430 | struct page *page) |
| 1431 | { |
Nathan Scott | e4c573b | 2006-03-14 13:54:26 +1100 | [diff] [blame] | 1432 | return mpage_readpage(page, xfs_get_block); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1433 | } |
| 1434 | |
| 1435 | STATIC int |
Nathan Scott | e4c573b | 2006-03-14 13:54:26 +1100 | [diff] [blame] | 1436 | xfs_vm_readpages( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1437 | struct file *unused, |
| 1438 | struct address_space *mapping, |
| 1439 | struct list_head *pages, |
| 1440 | unsigned nr_pages) |
| 1441 | { |
Nathan Scott | e4c573b | 2006-03-14 13:54:26 +1100 | [diff] [blame] | 1442 | return mpage_readpages(mapping, pages, nr_pages, xfs_get_block); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1443 | } |
| 1444 | |
Nathan Scott | bcec2b7 | 2005-09-02 16:40:17 +1000 | [diff] [blame] | 1445 | STATIC int |
Nathan Scott | 238f4c5 | 2006-03-17 17:26:25 +1100 | [diff] [blame^] | 1446 | xfs_vm_invalidatepage( |
Nathan Scott | bcec2b7 | 2005-09-02 16:40:17 +1000 | [diff] [blame] | 1447 | struct page *page, |
| 1448 | unsigned long offset) |
| 1449 | { |
| 1450 | xfs_page_trace(XFS_INVALIDPAGE_ENTER, |
| 1451 | page->mapping->host, page, offset); |
| 1452 | return block_invalidatepage(page, offset); |
| 1453 | } |
| 1454 | |
Nathan Scott | e4c573b | 2006-03-14 13:54:26 +1100 | [diff] [blame] | 1455 | struct address_space_operations xfs_address_space_operations = { |
| 1456 | .readpage = xfs_vm_readpage, |
| 1457 | .readpages = xfs_vm_readpages, |
| 1458 | .writepage = xfs_vm_writepage, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1459 | .sync_page = block_sync_page, |
Nathan Scott | 238f4c5 | 2006-03-17 17:26:25 +1100 | [diff] [blame^] | 1460 | .releasepage = xfs_vm_releasepage, |
| 1461 | .invalidatepage = xfs_vm_invalidatepage, |
Nathan Scott | e4c573b | 2006-03-14 13:54:26 +1100 | [diff] [blame] | 1462 | .prepare_write = xfs_vm_prepare_write, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1463 | .commit_write = generic_commit_write, |
Nathan Scott | e4c573b | 2006-03-14 13:54:26 +1100 | [diff] [blame] | 1464 | .bmap = xfs_vm_bmap, |
| 1465 | .direct_IO = xfs_vm_direct_IO, |
Christoph Lameter | e965f96 | 2006-02-01 03:05:41 -0800 | [diff] [blame] | 1466 | .migratepage = buffer_migrate_page, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1467 | }; |