1 /* 2 * fs/f2fs/inline.c 3 * Copyright (c) 2013, Intel Corporation 4 * Authors: Huajun Li <huajun.li@intel.com> 5 * Haicheng Li <haicheng.li@intel.com> 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 */ 10 11 #include <linux/fs.h> 12 #include <linux/f2fs_fs.h> 13 14 #include "f2fs.h" 15 16 bool f2fs_may_inline_data(struct inode *inode) 17 { 18 if (!test_opt(F2FS_I_SB(inode), INLINE_DATA)) 19 return false; 20 21 if (f2fs_is_atomic_file(inode)) 22 return false; 23 24 if (!S_ISREG(inode->i_mode) && !S_ISLNK(inode->i_mode)) 25 return false; 26 27 if (i_size_read(inode) > MAX_INLINE_DATA) 28 return false; 29 30 if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) 31 return false; 32 33 return true; 34 } 35 36 bool f2fs_may_inline_dentry(struct inode *inode) 37 { 38 if (!test_opt(F2FS_I_SB(inode), INLINE_DENTRY)) 39 return false; 40 41 if (!S_ISDIR(inode->i_mode)) 42 return false; 43 44 return true; 45 } 46 47 void read_inline_data(struct page *page, struct page *ipage) 48 { 49 void *src_addr, *dst_addr; 50 51 if (PageUptodate(page)) 52 return; 53 54 f2fs_bug_on(F2FS_P_SB(page), page->index); 55 56 zero_user_segment(page, MAX_INLINE_DATA, PAGE_CACHE_SIZE); 57 58 /* Copy the whole inline data block */ 59 src_addr = inline_data_addr(ipage); 60 dst_addr = kmap_atomic(page); 61 memcpy(dst_addr, src_addr, MAX_INLINE_DATA); 62 flush_dcache_page(page); 63 kunmap_atomic(dst_addr); 64 SetPageUptodate(page); 65 } 66 67 bool truncate_inline_inode(struct page *ipage, u64 from) 68 { 69 void *addr; 70 71 if (from >= MAX_INLINE_DATA) 72 return false; 73 74 addr = inline_data_addr(ipage); 75 76 f2fs_wait_on_page_writeback(ipage, NODE); 77 memset(addr + from, 0, MAX_INLINE_DATA - from); 78 79 return true; 80 } 81 82 int f2fs_read_inline_data(struct inode *inode, struct page *page) 83 { 84 struct page *ipage; 85 86 ipage = get_node_page(F2FS_I_SB(inode), inode->i_ino); 87 if (IS_ERR(ipage)) { 88 unlock_page(page); 89 return PTR_ERR(ipage); 90 } 91 92 if (!f2fs_has_inline_data(inode)) { 93 f2fs_put_page(ipage, 1); 94 return -EAGAIN; 95 } 96 97 if (page->index) 98 zero_user_segment(page, 0, PAGE_CACHE_SIZE); 99 else 100 read_inline_data(page, ipage); 101 102 SetPageUptodate(page); 103 f2fs_put_page(ipage, 1); 104 unlock_page(page); 105 return 0; 106 } 107 108 int f2fs_convert_inline_page(struct dnode_of_data *dn, struct page *page) 109 { 110 void *src_addr, *dst_addr; 111 struct f2fs_io_info fio = { 112 .sbi = F2FS_I_SB(dn->inode), 113 .type = DATA, 114 .rw = WRITE_SYNC | REQ_PRIO, 115 .page = page, 116 .encrypted_page = NULL, 117 }; 118 int dirty, err; 119 120 f2fs_bug_on(F2FS_I_SB(dn->inode), page->index); 121 122 if (!f2fs_exist_data(dn->inode)) 123 goto clear_out; 124 125 err = f2fs_reserve_block(dn, 0); 126 if (err) 127 return err; 128 129 f2fs_wait_on_page_writeback(page, DATA); 130 131 if (PageUptodate(page)) 132 goto no_update; 133 134 zero_user_segment(page, MAX_INLINE_DATA, PAGE_CACHE_SIZE); 135 136 /* Copy the whole inline data block */ 137 src_addr = inline_data_addr(dn->inode_page); 138 dst_addr = kmap_atomic(page); 139 memcpy(dst_addr, src_addr, MAX_INLINE_DATA); 140 flush_dcache_page(page); 141 kunmap_atomic(dst_addr); 142 SetPageUptodate(page); 143 no_update: 144 /* clear dirty state */ 145 dirty = clear_page_dirty_for_io(page); 146 147 /* write data page to try to make data consistent */ 148 set_page_writeback(page); 149 fio.blk_addr = dn->data_blkaddr; 150 write_data_page(dn, &fio); 151 set_data_blkaddr(dn); 152 f2fs_update_extent_cache(dn); 153 f2fs_wait_on_page_writeback(page, DATA); 154 if (dirty) 155 inode_dec_dirty_pages(dn->inode); 156 157 /* this converted inline_data should be recovered. */ 158 set_inode_flag(F2FS_I(dn->inode), FI_APPEND_WRITE); 159 160 /* clear inline data and flag after data writeback */ 161 truncate_inline_inode(dn->inode_page, 0); 162 clear_out: 163 stat_dec_inline_inode(dn->inode); 164 f2fs_clear_inline_inode(dn->inode); 165 sync_inode_page(dn); 166 f2fs_put_dnode(dn); 167 return 0; 168 } 169 170 int f2fs_convert_inline_inode(struct inode *inode) 171 { 172 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 173 struct dnode_of_data dn; 174 struct page *ipage, *page; 175 int err = 0; 176 177 page = grab_cache_page(inode->i_mapping, 0); 178 if (!page) 179 return -ENOMEM; 180 181 f2fs_lock_op(sbi); 182 183 ipage = get_node_page(sbi, inode->i_ino); 184 if (IS_ERR(ipage)) { 185 err = PTR_ERR(ipage); 186 goto out; 187 } 188 189 set_new_dnode(&dn, inode, ipage, ipage, 0); 190 191 if (f2fs_has_inline_data(inode)) 192 err = f2fs_convert_inline_page(&dn, page); 193 194 f2fs_put_dnode(&dn); 195 out: 196 f2fs_unlock_op(sbi); 197 198 f2fs_put_page(page, 1); 199 return err; 200 } 201 202 int f2fs_write_inline_data(struct inode *inode, struct page *page) 203 { 204 void *src_addr, *dst_addr; 205 struct dnode_of_data dn; 206 int err; 207 208 set_new_dnode(&dn, inode, NULL, NULL, 0); 209 err = get_dnode_of_data(&dn, 0, LOOKUP_NODE); 210 if (err) 211 return err; 212 213 if (!f2fs_has_inline_data(inode)) { 214 f2fs_put_dnode(&dn); 215 return -EAGAIN; 216 } 217 218 f2fs_bug_on(F2FS_I_SB(inode), page->index); 219 220 f2fs_wait_on_page_writeback(dn.inode_page, NODE); 221 src_addr = kmap_atomic(page); 222 dst_addr = inline_data_addr(dn.inode_page); 223 memcpy(dst_addr, src_addr, MAX_INLINE_DATA); 224 kunmap_atomic(src_addr); 225 226 set_inode_flag(F2FS_I(inode), FI_APPEND_WRITE); 227 set_inode_flag(F2FS_I(inode), FI_DATA_EXIST); 228 229 sync_inode_page(&dn); 230 f2fs_put_dnode(&dn); 231 return 0; 232 } 233 234 bool recover_inline_data(struct inode *inode, struct page *npage) 235 { 236 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 237 struct f2fs_inode *ri = NULL; 238 void *src_addr, *dst_addr; 239 struct page *ipage; 240 241 /* 242 * The inline_data recovery policy is as follows. 243 * [prev.] [next] of inline_data flag 244 * o o -> recover inline_data 245 * o x -> remove inline_data, and then recover data blocks 246 * x o -> remove inline_data, and then recover inline_data 247 * x x -> recover data blocks 248 */ 249 if (IS_INODE(npage)) 250 ri = F2FS_INODE(npage); 251 252 if (f2fs_has_inline_data(inode) && 253 ri && (ri->i_inline & F2FS_INLINE_DATA)) { 254 process_inline: 255 ipage = get_node_page(sbi, inode->i_ino); 256 f2fs_bug_on(sbi, IS_ERR(ipage)); 257 258 f2fs_wait_on_page_writeback(ipage, NODE); 259 260 src_addr = inline_data_addr(npage); 261 dst_addr = inline_data_addr(ipage); 262 memcpy(dst_addr, src_addr, MAX_INLINE_DATA); 263 264 set_inode_flag(F2FS_I(inode), FI_INLINE_DATA); 265 set_inode_flag(F2FS_I(inode), FI_DATA_EXIST); 266 267 update_inode(inode, ipage); 268 f2fs_put_page(ipage, 1); 269 return true; 270 } 271 272 if (f2fs_has_inline_data(inode)) { 273 ipage = get_node_page(sbi, inode->i_ino); 274 f2fs_bug_on(sbi, IS_ERR(ipage)); 275 truncate_inline_inode(ipage, 0); 276 f2fs_clear_inline_inode(inode); 277 update_inode(inode, ipage); 278 f2fs_put_page(ipage, 1); 279 } else if (ri && (ri->i_inline & F2FS_INLINE_DATA)) { 280 truncate_blocks(inode, 0, false); 281 goto process_inline; 282 } 283 return false; 284 } 285 286 struct f2fs_dir_entry *find_in_inline_dir(struct inode *dir, 287 struct f2fs_filename *fname, struct page **res_page) 288 { 289 struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb); 290 struct f2fs_inline_dentry *inline_dentry; 291 struct qstr name = FSTR_TO_QSTR(&fname->disk_name); 292 struct f2fs_dir_entry *de; 293 struct f2fs_dentry_ptr d; 294 struct page *ipage; 295 f2fs_hash_t namehash; 296 297 ipage = get_node_page(sbi, dir->i_ino); 298 if (IS_ERR(ipage)) 299 return NULL; 300 301 namehash = f2fs_dentry_hash(&name); 302 303 inline_dentry = inline_data_addr(ipage); 304 305 make_dentry_ptr(NULL, &d, (void *)inline_dentry, 2); 306 de = find_target_dentry(fname, namehash, NULL, &d); 307 unlock_page(ipage); 308 if (de) 309 *res_page = ipage; 310 else 311 f2fs_put_page(ipage, 0); 312 313 /* 314 * For the most part, it should be a bug when name_len is zero. 315 * We stop here for figuring out where the bugs has occurred. 316 */ 317 f2fs_bug_on(sbi, d.max < 0); 318 return de; 319 } 320 321 struct f2fs_dir_entry *f2fs_parent_inline_dir(struct inode *dir, 322 struct page **p) 323 { 324 struct f2fs_sb_info *sbi = F2FS_I_SB(dir); 325 struct page *ipage; 326 struct f2fs_dir_entry *de; 327 struct f2fs_inline_dentry *dentry_blk; 328 329 ipage = get_node_page(sbi, dir->i_ino); 330 if (IS_ERR(ipage)) 331 return NULL; 332 333 dentry_blk = inline_data_addr(ipage); 334 de = &dentry_blk->dentry[1]; 335 *p = ipage; 336 unlock_page(ipage); 337 return de; 338 } 339 340 int make_empty_inline_dir(struct inode *inode, struct inode *parent, 341 struct page *ipage) 342 { 343 struct f2fs_inline_dentry *dentry_blk; 344 struct f2fs_dentry_ptr d; 345 346 dentry_blk = inline_data_addr(ipage); 347 348 make_dentry_ptr(NULL, &d, (void *)dentry_blk, 2); 349 do_make_empty_dir(inode, parent, &d); 350 351 set_page_dirty(ipage); 352 353 /* update i_size to MAX_INLINE_DATA */ 354 if (i_size_read(inode) < MAX_INLINE_DATA) { 355 i_size_write(inode, MAX_INLINE_DATA); 356 set_inode_flag(F2FS_I(inode), FI_UPDATE_DIR); 357 } 358 return 0; 359 } 360 361 static int f2fs_convert_inline_dir(struct inode *dir, struct page *ipage, 362 struct f2fs_inline_dentry *inline_dentry) 363 { 364 struct page *page; 365 struct dnode_of_data dn; 366 struct f2fs_dentry_block *dentry_blk; 367 int err; 368 369 page = grab_cache_page(dir->i_mapping, 0); 370 if (!page) 371 return -ENOMEM; 372 373 set_new_dnode(&dn, dir, ipage, NULL, 0); 374 err = f2fs_reserve_block(&dn, 0); 375 if (err) 376 goto out; 377 378 f2fs_wait_on_page_writeback(page, DATA); 379 zero_user_segment(page, 0, PAGE_CACHE_SIZE); 380 381 dentry_blk = kmap_atomic(page); 382 383 /* copy data from inline dentry block to new dentry block */ 384 memcpy(dentry_blk->dentry_bitmap, inline_dentry->dentry_bitmap, 385 INLINE_DENTRY_BITMAP_SIZE); 386 memcpy(dentry_blk->dentry, inline_dentry->dentry, 387 sizeof(struct f2fs_dir_entry) * NR_INLINE_DENTRY); 388 memcpy(dentry_blk->filename, inline_dentry->filename, 389 NR_INLINE_DENTRY * F2FS_SLOT_LEN); 390 391 kunmap_atomic(dentry_blk); 392 SetPageUptodate(page); 393 set_page_dirty(page); 394 395 /* clear inline dir and flag after data writeback */ 396 truncate_inline_inode(ipage, 0); 397 398 stat_dec_inline_dir(dir); 399 clear_inode_flag(F2FS_I(dir), FI_INLINE_DENTRY); 400 401 if (i_size_read(dir) < PAGE_CACHE_SIZE) { 402 i_size_write(dir, PAGE_CACHE_SIZE); 403 set_inode_flag(F2FS_I(dir), FI_UPDATE_DIR); 404 } 405 406 sync_inode_page(&dn); 407 out: 408 f2fs_put_page(page, 1); 409 return err; 410 } 411 412 int f2fs_add_inline_entry(struct inode *dir, const struct qstr *name, 413 struct inode *inode, nid_t ino, umode_t mode) 414 { 415 struct f2fs_sb_info *sbi = F2FS_I_SB(dir); 416 struct page *ipage; 417 unsigned int bit_pos; 418 f2fs_hash_t name_hash; 419 size_t namelen = name->len; 420 struct f2fs_inline_dentry *dentry_blk = NULL; 421 struct f2fs_dentry_ptr d; 422 int slots = GET_DENTRY_SLOTS(namelen); 423 struct page *page = NULL; 424 int err = 0; 425 426 ipage = get_node_page(sbi, dir->i_ino); 427 if (IS_ERR(ipage)) 428 return PTR_ERR(ipage); 429 430 dentry_blk = inline_data_addr(ipage); 431 bit_pos = room_for_filename(&dentry_blk->dentry_bitmap, 432 slots, NR_INLINE_DENTRY); 433 if (bit_pos >= NR_INLINE_DENTRY) { 434 err = f2fs_convert_inline_dir(dir, ipage, dentry_blk); 435 if (!err) 436 err = -EAGAIN; 437 goto out; 438 } 439 440 if (inode) { 441 down_write(&F2FS_I(inode)->i_sem); 442 page = init_inode_metadata(inode, dir, name, ipage); 443 if (IS_ERR(page)) { 444 err = PTR_ERR(page); 445 goto fail; 446 } 447 } 448 449 f2fs_wait_on_page_writeback(ipage, NODE); 450 451 name_hash = f2fs_dentry_hash(name); 452 make_dentry_ptr(NULL, &d, (void *)dentry_blk, 2); 453 f2fs_update_dentry(ino, mode, &d, name, name_hash, bit_pos); 454 455 set_page_dirty(ipage); 456 457 /* we don't need to mark_inode_dirty now */ 458 if (inode) { 459 F2FS_I(inode)->i_pino = dir->i_ino; 460 update_inode(inode, page); 461 f2fs_put_page(page, 1); 462 } 463 464 update_parent_metadata(dir, inode, 0); 465 fail: 466 if (inode) 467 up_write(&F2FS_I(inode)->i_sem); 468 469 if (is_inode_flag_set(F2FS_I(dir), FI_UPDATE_DIR)) { 470 update_inode(dir, ipage); 471 clear_inode_flag(F2FS_I(dir), FI_UPDATE_DIR); 472 } 473 out: 474 f2fs_put_page(ipage, 1); 475 return err; 476 } 477 478 void f2fs_delete_inline_entry(struct f2fs_dir_entry *dentry, struct page *page, 479 struct inode *dir, struct inode *inode) 480 { 481 struct f2fs_inline_dentry *inline_dentry; 482 int slots = GET_DENTRY_SLOTS(le16_to_cpu(dentry->name_len)); 483 unsigned int bit_pos; 484 int i; 485 486 lock_page(page); 487 f2fs_wait_on_page_writeback(page, NODE); 488 489 inline_dentry = inline_data_addr(page); 490 bit_pos = dentry - inline_dentry->dentry; 491 for (i = 0; i < slots; i++) 492 test_and_clear_bit_le(bit_pos + i, 493 &inline_dentry->dentry_bitmap); 494 495 set_page_dirty(page); 496 497 dir->i_ctime = dir->i_mtime = CURRENT_TIME; 498 499 if (inode) 500 f2fs_drop_nlink(dir, inode, page); 501 502 f2fs_put_page(page, 1); 503 } 504 505 bool f2fs_empty_inline_dir(struct inode *dir) 506 { 507 struct f2fs_sb_info *sbi = F2FS_I_SB(dir); 508 struct page *ipage; 509 unsigned int bit_pos = 2; 510 struct f2fs_inline_dentry *dentry_blk; 511 512 ipage = get_node_page(sbi, dir->i_ino); 513 if (IS_ERR(ipage)) 514 return false; 515 516 dentry_blk = inline_data_addr(ipage); 517 bit_pos = find_next_bit_le(&dentry_blk->dentry_bitmap, 518 NR_INLINE_DENTRY, 519 bit_pos); 520 521 f2fs_put_page(ipage, 1); 522 523 if (bit_pos < NR_INLINE_DENTRY) 524 return false; 525 526 return true; 527 } 528 529 int f2fs_read_inline_dir(struct file *file, struct dir_context *ctx, 530 struct f2fs_str *fstr) 531 { 532 struct inode *inode = file_inode(file); 533 struct f2fs_inline_dentry *inline_dentry = NULL; 534 struct page *ipage = NULL; 535 struct f2fs_dentry_ptr d; 536 537 if (ctx->pos == NR_INLINE_DENTRY) 538 return 0; 539 540 ipage = get_node_page(F2FS_I_SB(inode), inode->i_ino); 541 if (IS_ERR(ipage)) 542 return PTR_ERR(ipage); 543 544 inline_dentry = inline_data_addr(ipage); 545 546 make_dentry_ptr(inode, &d, (void *)inline_dentry, 2); 547 548 if (!f2fs_fill_dentries(ctx, &d, 0, fstr)) 549 ctx->pos = NR_INLINE_DENTRY; 550 551 f2fs_put_page(ipage, 1); 552 return 0; 553 } 554