1 /* 2 * linux/fs/ufs/inode.c 3 * 4 * Copyright (C) 1998 5 * Daniel Pirkl <daniel.pirkl@email.cz> 6 * Charles University, Faculty of Mathematics and Physics 7 * 8 * from 9 * 10 * linux/fs/ext2/inode.c 11 * 12 * Copyright (C) 1992, 1993, 1994, 1995 13 * Remy Card (card@masi.ibp.fr) 14 * Laboratoire MASI - Institut Blaise Pascal 15 * Universite Pierre et Marie Curie (Paris VI) 16 * 17 * from 18 * 19 * linux/fs/minix/inode.c 20 * 21 * Copyright (C) 1991, 1992 Linus Torvalds 22 * 23 * Goal-directed block allocation by Stephen Tweedie (sct@dcs.ed.ac.uk), 1993 24 * Big-endian to little-endian byte-swapping/bitmaps by 25 * David S. Miller (davem@caip.rutgers.edu), 1995 26 */ 27 28 #include <asm/uaccess.h> 29 30 #include <linux/errno.h> 31 #include <linux/fs.h> 32 #include <linux/time.h> 33 #include <linux/stat.h> 34 #include <linux/string.h> 35 #include <linux/mm.h> 36 #include <linux/buffer_head.h> 37 #include <linux/writeback.h> 38 39 #include "ufs_fs.h" 40 #include "ufs.h" 41 #include "swab.h" 42 #include "util.h" 43 44 static int ufs_block_to_path(struct inode *inode, sector_t i_block, unsigned offsets[4]) 45 { 46 struct ufs_sb_private_info *uspi = UFS_SB(inode->i_sb)->s_uspi; 47 int ptrs = uspi->s_apb; 48 int ptrs_bits = uspi->s_apbshift; 49 const long direct_blocks = UFS_NDADDR, 50 indirect_blocks = ptrs, 51 double_blocks = (1 << (ptrs_bits * 2)); 52 int n = 0; 53 54 55 UFSD("ptrs=uspi->s_apb = %d,double_blocks=%ld \n",ptrs,double_blocks); 56 if (i_block < direct_blocks) { 57 offsets[n++] = i_block; 58 } else if ((i_block -= direct_blocks) < indirect_blocks) { 59 offsets[n++] = UFS_IND_BLOCK; 60 offsets[n++] = i_block; 61 } else if ((i_block -= indirect_blocks) < double_blocks) { 62 offsets[n++] = UFS_DIND_BLOCK; 63 offsets[n++] = i_block >> ptrs_bits; 64 offsets[n++] = i_block & (ptrs - 1); 65 } else if (((i_block -= double_blocks) >> (ptrs_bits * 2)) < ptrs) { 66 offsets[n++] = UFS_TIND_BLOCK; 67 offsets[n++] = i_block >> (ptrs_bits * 2); 68 offsets[n++] = (i_block >> ptrs_bits) & (ptrs - 1); 69 offsets[n++] = i_block & (ptrs - 1); 70 } else { 71 ufs_warning(inode->i_sb, "ufs_block_to_path", "block > big"); 72 } 73 return n; 74 } 75 76 typedef struct { 77 void *p; 78 union { 79 __fs32 key32; 80 __fs64 key64; 81 }; 82 struct buffer_head *bh; 83 } Indirect; 84 85 static inline int grow_chain32(struct ufs_inode_info *ufsi, 86 struct buffer_head *bh, __fs32 *v, 87 Indirect *from, Indirect *to) 88 { 89 Indirect *p; 90 unsigned seq; 91 to->bh = bh; 92 do { 93 seq = read_seqbegin(&ufsi->meta_lock); 94 to->key32 = *(__fs32 *)(to->p = v); 95 for (p = from; p <= to && p->key32 == *(__fs32 *)p->p; p++) 96 ; 97 } while (read_seqretry(&ufsi->meta_lock, seq)); 98 return (p > to); 99 } 100 101 static inline int grow_chain64(struct ufs_inode_info *ufsi, 102 struct buffer_head *bh, __fs64 *v, 103 Indirect *from, Indirect *to) 104 { 105 Indirect *p; 106 unsigned seq; 107 to->bh = bh; 108 do { 109 seq = read_seqbegin(&ufsi->meta_lock); 110 to->key64 = *(__fs64 *)(to->p = v); 111 for (p = from; p <= to && p->key64 == *(__fs64 *)p->p; p++) 112 ; 113 } while (read_seqretry(&ufsi->meta_lock, seq)); 114 return (p > to); 115 } 116 117 /* 118 * Returns the location of the fragment from 119 * the beginning of the filesystem. 120 */ 121 122 static u64 ufs_frag_map(struct inode *inode, unsigned offsets[4], int depth) 123 { 124 struct ufs_inode_info *ufsi = UFS_I(inode); 125 struct super_block *sb = inode->i_sb; 126 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 127 u64 mask = (u64) uspi->s_apbmask>>uspi->s_fpbshift; 128 int shift = uspi->s_apbshift-uspi->s_fpbshift; 129 Indirect chain[4], *q = chain; 130 unsigned *p; 131 unsigned flags = UFS_SB(sb)->s_flags; 132 u64 res = 0; 133 134 UFSD(": uspi->s_fpbshift = %d ,uspi->s_apbmask = %x, mask=%llx\n", 135 uspi->s_fpbshift, uspi->s_apbmask, 136 (unsigned long long)mask); 137 138 if (depth == 0) 139 goto no_block; 140 141 again: 142 p = offsets; 143 144 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) 145 goto ufs2; 146 147 if (!grow_chain32(ufsi, NULL, &ufsi->i_u1.i_data[*p++], chain, q)) 148 goto changed; 149 if (!q->key32) 150 goto no_block; 151 while (--depth) { 152 __fs32 *ptr; 153 struct buffer_head *bh; 154 unsigned n = *p++; 155 156 bh = sb_bread(sb, uspi->s_sbbase + 157 fs32_to_cpu(sb, q->key32) + (n>>shift)); 158 if (!bh) 159 goto no_block; 160 ptr = (__fs32 *)bh->b_data + (n & mask); 161 if (!grow_chain32(ufsi, bh, ptr, chain, ++q)) 162 goto changed; 163 if (!q->key32) 164 goto no_block; 165 } 166 res = fs32_to_cpu(sb, q->key32); 167 goto found; 168 169 ufs2: 170 if (!grow_chain64(ufsi, NULL, &ufsi->i_u1.u2_i_data[*p++], chain, q)) 171 goto changed; 172 if (!q->key64) 173 goto no_block; 174 175 while (--depth) { 176 __fs64 *ptr; 177 struct buffer_head *bh; 178 unsigned n = *p++; 179 180 bh = sb_bread(sb, uspi->s_sbbase + 181 fs64_to_cpu(sb, q->key64) + (n>>shift)); 182 if (!bh) 183 goto no_block; 184 ptr = (__fs64 *)bh->b_data + (n & mask); 185 if (!grow_chain64(ufsi, bh, ptr, chain, ++q)) 186 goto changed; 187 if (!q->key64) 188 goto no_block; 189 } 190 res = fs64_to_cpu(sb, q->key64); 191 found: 192 res += uspi->s_sbbase; 193 no_block: 194 while (q > chain) { 195 brelse(q->bh); 196 q--; 197 } 198 return res; 199 200 changed: 201 while (q > chain) { 202 brelse(q->bh); 203 q--; 204 } 205 goto again; 206 } 207 208 /* 209 * Unpacking tails: we have a file with partial final block and 210 * we had been asked to extend it. If the fragment being written 211 * is within the same block, we need to extend the tail just to cover 212 * that fragment. Otherwise the tail is extended to full block. 213 * 214 * Note that we might need to create a _new_ tail, but that will 215 * be handled elsewhere; this is strictly for resizing old 216 * ones. 217 */ 218 static bool 219 ufs_extend_tail(struct inode *inode, u64 writes_to, 220 int *err, struct page *locked_page) 221 { 222 struct ufs_inode_info *ufsi = UFS_I(inode); 223 struct super_block *sb = inode->i_sb; 224 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 225 unsigned lastfrag = ufsi->i_lastfrag; /* it's a short file, so unsigned is enough */ 226 unsigned block = ufs_fragstoblks(lastfrag); 227 unsigned new_size; 228 void *p; 229 u64 tmp; 230 231 if (writes_to < (lastfrag | uspi->s_fpbmask)) 232 new_size = (writes_to & uspi->s_fpbmask) + 1; 233 else 234 new_size = uspi->s_fpb; 235 236 p = ufs_get_direct_data_ptr(uspi, ufsi, block); 237 tmp = ufs_new_fragments(inode, p, lastfrag, ufs_data_ptr_to_cpu(sb, p), 238 new_size, err, locked_page); 239 return tmp != 0; 240 } 241 242 /** 243 * ufs_inode_getfrag() - allocate new fragment(s) 244 * @inode: pointer to inode 245 * @fragment: number of `fragment' which hold pointer 246 * to new allocated fragment(s) 247 * @new_fragment: number of new allocated fragment(s) 248 * @required: how many fragment(s) we require 249 * @err: we set it if something wrong 250 * @phys: pointer to where we save physical number of new allocated fragments, 251 * NULL if we allocate not data(indirect blocks for example). 252 * @new: we set it if we allocate new block 253 * @locked_page: for ufs_new_fragments() 254 */ 255 static u64 256 ufs_inode_getfrag(struct inode *inode, u64 fragment, 257 sector_t new_fragment, unsigned int required, int *err, 258 long *phys, int *new, struct page *locked_page) 259 { 260 struct ufs_inode_info *ufsi = UFS_I(inode); 261 struct super_block *sb = inode->i_sb; 262 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 263 unsigned blockoff; 264 u64 tmp, goal, lastfrag, block; 265 unsigned nfrags = uspi->s_fpb; 266 void *p; 267 268 /* TODO : to be done for write support 269 if ( (flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) 270 goto ufs2; 271 */ 272 273 block = ufs_fragstoblks (fragment); 274 blockoff = ufs_fragnum (fragment); 275 p = ufs_get_direct_data_ptr(uspi, ufsi, block); 276 tmp = ufs_data_ptr_to_cpu(sb, p); 277 if (tmp) 278 goto out; 279 280 lastfrag = ufsi->i_lastfrag; 281 282 /* will that be a new tail? */ 283 if (new_fragment < UFS_NDIR_FRAGMENT && new_fragment >= lastfrag) 284 nfrags = (new_fragment & uspi->s_fpbmask) + 1; 285 286 goal = 0; 287 if (block) { 288 goal = ufs_data_ptr_to_cpu(sb, 289 ufs_get_direct_data_ptr(uspi, ufsi, block - 1)); 290 if (goal) 291 goal += uspi->s_fpb; 292 } 293 tmp = ufs_new_fragments(inode, p, fragment - blockoff, 294 goal, uspi->s_fpb, err, 295 phys != NULL ? locked_page : NULL); 296 297 if (!tmp) { 298 *err = -ENOSPC; 299 return 0; 300 } 301 302 if (phys) { 303 *err = 0; 304 *new = 1; 305 } 306 inode->i_ctime = CURRENT_TIME_SEC; 307 if (IS_SYNC(inode)) 308 ufs_sync_inode (inode); 309 mark_inode_dirty(inode); 310 out: 311 return tmp + uspi->s_sbbase; 312 313 /* This part : To be implemented .... 314 Required only for writing, not required for READ-ONLY. 315 ufs2: 316 317 u2_block = ufs_fragstoblks(fragment); 318 u2_blockoff = ufs_fragnum(fragment); 319 p = ufsi->i_u1.u2_i_data + block; 320 goal = 0; 321 322 repeat2: 323 tmp = fs32_to_cpu(sb, *p); 324 lastfrag = ufsi->i_lastfrag; 325 326 */ 327 } 328 329 /** 330 * ufs_inode_getblock() - allocate new block 331 * @inode: pointer to inode 332 * @ind_block: block number of the indirect block 333 * @index: number of pointer within the indirect block 334 * @new_fragment: number of new allocated fragment 335 * (block will hold this fragment and also uspi->s_fpb-1) 336 * @err: see ufs_inode_getfrag() 337 * @phys: see ufs_inode_getfrag() 338 * @new: see ufs_inode_getfrag() 339 * @locked_page: see ufs_inode_getfrag() 340 */ 341 static u64 342 ufs_inode_getblock(struct inode *inode, u64 ind_block, 343 unsigned index, sector_t new_fragment, int *err, 344 long *phys, int *new, struct page *locked_page) 345 { 346 struct super_block *sb = inode->i_sb; 347 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 348 int shift = uspi->s_apbshift - uspi->s_fpbshift; 349 u64 tmp = 0, goal; 350 struct buffer_head *bh; 351 void *p; 352 353 if (!ind_block) 354 return 0; 355 356 bh = sb_bread(sb, ind_block + (index >> shift)); 357 if (unlikely(!bh)) 358 return 0; 359 360 index &= uspi->s_apbmask >> uspi->s_fpbshift; 361 if (uspi->fs_magic == UFS2_MAGIC) 362 p = (__fs64 *)bh->b_data + index; 363 else 364 p = (__fs32 *)bh->b_data + index; 365 366 tmp = ufs_data_ptr_to_cpu(sb, p); 367 if (tmp) 368 goto out; 369 370 if (index && (uspi->fs_magic == UFS2_MAGIC ? 371 (tmp = fs64_to_cpu(sb, ((__fs64 *)bh->b_data)[index-1])) : 372 (tmp = fs32_to_cpu(sb, ((__fs32 *)bh->b_data)[index-1])))) 373 goal = tmp + uspi->s_fpb; 374 else 375 goal = bh->b_blocknr + uspi->s_fpb; 376 tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), goal, 377 uspi->s_fpb, err, locked_page); 378 if (!tmp) 379 goto out; 380 381 if (new) 382 *new = 1; 383 384 mark_buffer_dirty(bh); 385 if (IS_SYNC(inode)) 386 sync_dirty_buffer(bh); 387 inode->i_ctime = CURRENT_TIME_SEC; 388 mark_inode_dirty(inode); 389 out: 390 brelse (bh); 391 UFSD("EXIT\n"); 392 if (tmp) 393 tmp += uspi->s_sbbase; 394 return tmp; 395 } 396 397 /** 398 * ufs_getfrag_block() - `get_block_t' function, interface between UFS and 399 * readpage, writepage and so on 400 */ 401 402 static int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create) 403 { 404 struct super_block * sb = inode->i_sb; 405 struct ufs_sb_info * sbi = UFS_SB(sb); 406 struct ufs_sb_private_info * uspi = sbi->s_uspi; 407 struct buffer_head * bh; 408 int ret, err, new; 409 unsigned offsets[4]; 410 int depth = ufs_block_to_path(inode, fragment >> uspi->s_fpbshift, offsets); 411 unsigned long ptr,phys; 412 u64 phys64 = 0; 413 unsigned frag = fragment & uspi->s_fpbmask; 414 415 if (!create) { 416 phys64 = ufs_frag_map(inode, offsets, depth); 417 if (phys64) { 418 phys64 += frag; 419 map_bh(bh_result, sb, phys64); 420 } 421 return 0; 422 } 423 424 /* This code entered only while writing ....? */ 425 426 err = -EIO; 427 new = 0; 428 ret = 0; 429 bh = NULL; 430 431 mutex_lock(&UFS_I(inode)->truncate_mutex); 432 433 UFSD("ENTER, ino %lu, fragment %llu\n", inode->i_ino, (unsigned long long)fragment); 434 if (!depth) 435 goto abort_too_big; 436 437 err = 0; 438 439 if (UFS_I(inode)->i_lastfrag < UFS_NDIR_FRAGMENT) { 440 unsigned lastfrag = UFS_I(inode)->i_lastfrag; 441 unsigned tailfrags = lastfrag & uspi->s_fpbmask; 442 if (tailfrags && fragment >= lastfrag) { 443 if (!ufs_extend_tail(inode, fragment, 444 &err, bh_result->b_page)) 445 goto abort; 446 } 447 } 448 449 ptr = fragment; 450 451 if (depth == 1) { 452 phys64 = ufs_inode_getfrag(inode, ptr, fragment, 1, &err, &phys, 453 &new, bh_result->b_page); 454 if (phys64) { 455 phys64 += frag; 456 phys = phys64; 457 } 458 goto out; 459 } 460 ptr -= UFS_NDIR_FRAGMENT; 461 if (depth == 2) { 462 phys64 = ufs_inode_getfrag(inode, 463 UFS_IND_FRAGMENT + (ptr >> uspi->s_apbshift), 464 fragment, uspi->s_fpb, &err, NULL, NULL, 465 bh_result->b_page); 466 goto get_indirect; 467 } 468 ptr -= 1 << (uspi->s_apbshift + uspi->s_fpbshift); 469 if (depth == 3) { 470 phys64 = ufs_inode_getfrag(inode, 471 UFS_DIND_FRAGMENT + (ptr >> uspi->s_2apbshift), 472 fragment, uspi->s_fpb, &err, NULL, NULL, 473 bh_result->b_page); 474 goto get_double; 475 } 476 ptr -= 1 << (uspi->s_2apbshift + uspi->s_fpbshift); 477 phys64 = ufs_inode_getfrag(inode, 478 UFS_TIND_FRAGMENT + (ptr >> uspi->s_3apbshift), 479 fragment, uspi->s_fpb, &err, NULL, NULL, 480 bh_result->b_page); 481 phys64 = ufs_inode_getblock(inode, phys64, offsets[1], 482 fragment, &err, NULL, NULL, NULL); 483 get_double: 484 phys64 = ufs_inode_getblock(inode, phys64, offsets[depth - 2], 485 fragment, &err, NULL, NULL, NULL); 486 get_indirect: 487 phys64 = ufs_inode_getblock(inode, phys64, offsets[depth - 1], 488 fragment, &err, &phys, &new, bh_result->b_page); 489 if (phys64) { 490 phys64 += frag; 491 phys = phys64; 492 } 493 out: 494 if (err) 495 goto abort; 496 if (new) 497 set_buffer_new(bh_result); 498 map_bh(bh_result, sb, phys); 499 abort: 500 mutex_unlock(&UFS_I(inode)->truncate_mutex); 501 502 return err; 503 504 abort_too_big: 505 ufs_warning(sb, "ufs_get_block", "block > big"); 506 goto abort; 507 } 508 509 static int ufs_writepage(struct page *page, struct writeback_control *wbc) 510 { 511 return block_write_full_page(page,ufs_getfrag_block,wbc); 512 } 513 514 static int ufs_readpage(struct file *file, struct page *page) 515 { 516 return block_read_full_page(page,ufs_getfrag_block); 517 } 518 519 int ufs_prepare_chunk(struct page *page, loff_t pos, unsigned len) 520 { 521 return __block_write_begin(page, pos, len, ufs_getfrag_block); 522 } 523 524 static void ufs_truncate_blocks(struct inode *); 525 526 static void ufs_write_failed(struct address_space *mapping, loff_t to) 527 { 528 struct inode *inode = mapping->host; 529 530 if (to > inode->i_size) { 531 truncate_pagecache(inode, inode->i_size); 532 ufs_truncate_blocks(inode); 533 } 534 } 535 536 static int ufs_write_begin(struct file *file, struct address_space *mapping, 537 loff_t pos, unsigned len, unsigned flags, 538 struct page **pagep, void **fsdata) 539 { 540 int ret; 541 542 ret = block_write_begin(mapping, pos, len, flags, pagep, 543 ufs_getfrag_block); 544 if (unlikely(ret)) 545 ufs_write_failed(mapping, pos + len); 546 547 return ret; 548 } 549 550 static int ufs_write_end(struct file *file, struct address_space *mapping, 551 loff_t pos, unsigned len, unsigned copied, 552 struct page *page, void *fsdata) 553 { 554 int ret; 555 556 ret = generic_write_end(file, mapping, pos, len, copied, page, fsdata); 557 if (ret < len) 558 ufs_write_failed(mapping, pos + len); 559 return ret; 560 } 561 562 static sector_t ufs_bmap(struct address_space *mapping, sector_t block) 563 { 564 return generic_block_bmap(mapping,block,ufs_getfrag_block); 565 } 566 567 const struct address_space_operations ufs_aops = { 568 .readpage = ufs_readpage, 569 .writepage = ufs_writepage, 570 .write_begin = ufs_write_begin, 571 .write_end = ufs_write_end, 572 .bmap = ufs_bmap 573 }; 574 575 static void ufs_set_inode_ops(struct inode *inode) 576 { 577 if (S_ISREG(inode->i_mode)) { 578 inode->i_op = &ufs_file_inode_operations; 579 inode->i_fop = &ufs_file_operations; 580 inode->i_mapping->a_ops = &ufs_aops; 581 } else if (S_ISDIR(inode->i_mode)) { 582 inode->i_op = &ufs_dir_inode_operations; 583 inode->i_fop = &ufs_dir_operations; 584 inode->i_mapping->a_ops = &ufs_aops; 585 } else if (S_ISLNK(inode->i_mode)) { 586 if (!inode->i_blocks) { 587 inode->i_op = &ufs_fast_symlink_inode_operations; 588 inode->i_link = (char *)UFS_I(inode)->i_u1.i_symlink; 589 } else { 590 inode->i_op = &ufs_symlink_inode_operations; 591 inode->i_mapping->a_ops = &ufs_aops; 592 } 593 } else 594 init_special_inode(inode, inode->i_mode, 595 ufs_get_inode_dev(inode->i_sb, UFS_I(inode))); 596 } 597 598 static int ufs1_read_inode(struct inode *inode, struct ufs_inode *ufs_inode) 599 { 600 struct ufs_inode_info *ufsi = UFS_I(inode); 601 struct super_block *sb = inode->i_sb; 602 umode_t mode; 603 604 /* 605 * Copy data to the in-core inode. 606 */ 607 inode->i_mode = mode = fs16_to_cpu(sb, ufs_inode->ui_mode); 608 set_nlink(inode, fs16_to_cpu(sb, ufs_inode->ui_nlink)); 609 if (inode->i_nlink == 0) { 610 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino); 611 return -1; 612 } 613 614 /* 615 * Linux now has 32-bit uid and gid, so we can support EFT. 616 */ 617 i_uid_write(inode, ufs_get_inode_uid(sb, ufs_inode)); 618 i_gid_write(inode, ufs_get_inode_gid(sb, ufs_inode)); 619 620 inode->i_size = fs64_to_cpu(sb, ufs_inode->ui_size); 621 inode->i_atime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_atime.tv_sec); 622 inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_ctime.tv_sec); 623 inode->i_mtime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_mtime.tv_sec); 624 inode->i_mtime.tv_nsec = 0; 625 inode->i_atime.tv_nsec = 0; 626 inode->i_ctime.tv_nsec = 0; 627 inode->i_blocks = fs32_to_cpu(sb, ufs_inode->ui_blocks); 628 inode->i_generation = fs32_to_cpu(sb, ufs_inode->ui_gen); 629 ufsi->i_flags = fs32_to_cpu(sb, ufs_inode->ui_flags); 630 ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); 631 ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); 632 633 634 if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { 635 memcpy(ufsi->i_u1.i_data, &ufs_inode->ui_u2.ui_addr, 636 sizeof(ufs_inode->ui_u2.ui_addr)); 637 } else { 638 memcpy(ufsi->i_u1.i_symlink, ufs_inode->ui_u2.ui_symlink, 639 sizeof(ufs_inode->ui_u2.ui_symlink) - 1); 640 ufsi->i_u1.i_symlink[sizeof(ufs_inode->ui_u2.ui_symlink) - 1] = 0; 641 } 642 return 0; 643 } 644 645 static int ufs2_read_inode(struct inode *inode, struct ufs2_inode *ufs2_inode) 646 { 647 struct ufs_inode_info *ufsi = UFS_I(inode); 648 struct super_block *sb = inode->i_sb; 649 umode_t mode; 650 651 UFSD("Reading ufs2 inode, ino %lu\n", inode->i_ino); 652 /* 653 * Copy data to the in-core inode. 654 */ 655 inode->i_mode = mode = fs16_to_cpu(sb, ufs2_inode->ui_mode); 656 set_nlink(inode, fs16_to_cpu(sb, ufs2_inode->ui_nlink)); 657 if (inode->i_nlink == 0) { 658 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino); 659 return -1; 660 } 661 662 /* 663 * Linux now has 32-bit uid and gid, so we can support EFT. 664 */ 665 i_uid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_uid)); 666 i_gid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_gid)); 667 668 inode->i_size = fs64_to_cpu(sb, ufs2_inode->ui_size); 669 inode->i_atime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_atime); 670 inode->i_ctime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_ctime); 671 inode->i_mtime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_mtime); 672 inode->i_atime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_atimensec); 673 inode->i_ctime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_ctimensec); 674 inode->i_mtime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_mtimensec); 675 inode->i_blocks = fs64_to_cpu(sb, ufs2_inode->ui_blocks); 676 inode->i_generation = fs32_to_cpu(sb, ufs2_inode->ui_gen); 677 ufsi->i_flags = fs32_to_cpu(sb, ufs2_inode->ui_flags); 678 /* 679 ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); 680 ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); 681 */ 682 683 if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { 684 memcpy(ufsi->i_u1.u2_i_data, &ufs2_inode->ui_u2.ui_addr, 685 sizeof(ufs2_inode->ui_u2.ui_addr)); 686 } else { 687 memcpy(ufsi->i_u1.i_symlink, ufs2_inode->ui_u2.ui_symlink, 688 sizeof(ufs2_inode->ui_u2.ui_symlink) - 1); 689 ufsi->i_u1.i_symlink[sizeof(ufs2_inode->ui_u2.ui_symlink) - 1] = 0; 690 } 691 return 0; 692 } 693 694 struct inode *ufs_iget(struct super_block *sb, unsigned long ino) 695 { 696 struct ufs_inode_info *ufsi; 697 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 698 struct buffer_head * bh; 699 struct inode *inode; 700 int err; 701 702 UFSD("ENTER, ino %lu\n", ino); 703 704 if (ino < UFS_ROOTINO || ino > (uspi->s_ncg * uspi->s_ipg)) { 705 ufs_warning(sb, "ufs_read_inode", "bad inode number (%lu)\n", 706 ino); 707 return ERR_PTR(-EIO); 708 } 709 710 inode = iget_locked(sb, ino); 711 if (!inode) 712 return ERR_PTR(-ENOMEM); 713 if (!(inode->i_state & I_NEW)) 714 return inode; 715 716 ufsi = UFS_I(inode); 717 718 bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino)); 719 if (!bh) { 720 ufs_warning(sb, "ufs_read_inode", "unable to read inode %lu\n", 721 inode->i_ino); 722 goto bad_inode; 723 } 724 if ((UFS_SB(sb)->s_flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { 725 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data; 726 727 err = ufs2_read_inode(inode, 728 ufs2_inode + ufs_inotofsbo(inode->i_ino)); 729 } else { 730 struct ufs_inode *ufs_inode = (struct ufs_inode *)bh->b_data; 731 732 err = ufs1_read_inode(inode, 733 ufs_inode + ufs_inotofsbo(inode->i_ino)); 734 } 735 736 if (err) 737 goto bad_inode; 738 inode->i_version++; 739 ufsi->i_lastfrag = 740 (inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift; 741 ufsi->i_dir_start_lookup = 0; 742 ufsi->i_osync = 0; 743 744 ufs_set_inode_ops(inode); 745 746 brelse(bh); 747 748 UFSD("EXIT\n"); 749 unlock_new_inode(inode); 750 return inode; 751 752 bad_inode: 753 iget_failed(inode); 754 return ERR_PTR(-EIO); 755 } 756 757 static void ufs1_update_inode(struct inode *inode, struct ufs_inode *ufs_inode) 758 { 759 struct super_block *sb = inode->i_sb; 760 struct ufs_inode_info *ufsi = UFS_I(inode); 761 762 ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode); 763 ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink); 764 765 ufs_set_inode_uid(sb, ufs_inode, i_uid_read(inode)); 766 ufs_set_inode_gid(sb, ufs_inode, i_gid_read(inode)); 767 768 ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size); 769 ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb, inode->i_atime.tv_sec); 770 ufs_inode->ui_atime.tv_usec = 0; 771 ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb, inode->i_ctime.tv_sec); 772 ufs_inode->ui_ctime.tv_usec = 0; 773 ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb, inode->i_mtime.tv_sec); 774 ufs_inode->ui_mtime.tv_usec = 0; 775 ufs_inode->ui_blocks = cpu_to_fs32(sb, inode->i_blocks); 776 ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags); 777 ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation); 778 779 if ((UFS_SB(sb)->s_flags & UFS_UID_MASK) == UFS_UID_EFT) { 780 ufs_inode->ui_u3.ui_sun.ui_shadow = cpu_to_fs32(sb, ufsi->i_shadow); 781 ufs_inode->ui_u3.ui_sun.ui_oeftflag = cpu_to_fs32(sb, ufsi->i_oeftflag); 782 } 783 784 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { 785 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */ 786 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.i_data[0]; 787 } else if (inode->i_blocks) { 788 memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.i_data, 789 sizeof(ufs_inode->ui_u2.ui_addr)); 790 } 791 else { 792 memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink, 793 sizeof(ufs_inode->ui_u2.ui_symlink)); 794 } 795 796 if (!inode->i_nlink) 797 memset (ufs_inode, 0, sizeof(struct ufs_inode)); 798 } 799 800 static void ufs2_update_inode(struct inode *inode, struct ufs2_inode *ufs_inode) 801 { 802 struct super_block *sb = inode->i_sb; 803 struct ufs_inode_info *ufsi = UFS_I(inode); 804 805 UFSD("ENTER\n"); 806 ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode); 807 ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink); 808 809 ufs_inode->ui_uid = cpu_to_fs32(sb, i_uid_read(inode)); 810 ufs_inode->ui_gid = cpu_to_fs32(sb, i_gid_read(inode)); 811 812 ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size); 813 ufs_inode->ui_atime = cpu_to_fs64(sb, inode->i_atime.tv_sec); 814 ufs_inode->ui_atimensec = cpu_to_fs32(sb, inode->i_atime.tv_nsec); 815 ufs_inode->ui_ctime = cpu_to_fs64(sb, inode->i_ctime.tv_sec); 816 ufs_inode->ui_ctimensec = cpu_to_fs32(sb, inode->i_ctime.tv_nsec); 817 ufs_inode->ui_mtime = cpu_to_fs64(sb, inode->i_mtime.tv_sec); 818 ufs_inode->ui_mtimensec = cpu_to_fs32(sb, inode->i_mtime.tv_nsec); 819 820 ufs_inode->ui_blocks = cpu_to_fs64(sb, inode->i_blocks); 821 ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags); 822 ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation); 823 824 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { 825 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */ 826 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.u2_i_data[0]; 827 } else if (inode->i_blocks) { 828 memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.u2_i_data, 829 sizeof(ufs_inode->ui_u2.ui_addr)); 830 } else { 831 memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink, 832 sizeof(ufs_inode->ui_u2.ui_symlink)); 833 } 834 835 if (!inode->i_nlink) 836 memset (ufs_inode, 0, sizeof(struct ufs2_inode)); 837 UFSD("EXIT\n"); 838 } 839 840 static int ufs_update_inode(struct inode * inode, int do_sync) 841 { 842 struct super_block *sb = inode->i_sb; 843 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 844 struct buffer_head * bh; 845 846 UFSD("ENTER, ino %lu\n", inode->i_ino); 847 848 if (inode->i_ino < UFS_ROOTINO || 849 inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) { 850 ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino); 851 return -1; 852 } 853 854 bh = sb_bread(sb, ufs_inotofsba(inode->i_ino)); 855 if (!bh) { 856 ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino); 857 return -1; 858 } 859 if (uspi->fs_magic == UFS2_MAGIC) { 860 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data; 861 862 ufs2_update_inode(inode, 863 ufs2_inode + ufs_inotofsbo(inode->i_ino)); 864 } else { 865 struct ufs_inode *ufs_inode = (struct ufs_inode *) bh->b_data; 866 867 ufs1_update_inode(inode, ufs_inode + ufs_inotofsbo(inode->i_ino)); 868 } 869 870 mark_buffer_dirty(bh); 871 if (do_sync) 872 sync_dirty_buffer(bh); 873 brelse (bh); 874 875 UFSD("EXIT\n"); 876 return 0; 877 } 878 879 int ufs_write_inode(struct inode *inode, struct writeback_control *wbc) 880 { 881 return ufs_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL); 882 } 883 884 int ufs_sync_inode (struct inode *inode) 885 { 886 return ufs_update_inode (inode, 1); 887 } 888 889 void ufs_evict_inode(struct inode * inode) 890 { 891 int want_delete = 0; 892 893 if (!inode->i_nlink && !is_bad_inode(inode)) 894 want_delete = 1; 895 896 truncate_inode_pages_final(&inode->i_data); 897 if (want_delete) { 898 inode->i_size = 0; 899 if (inode->i_blocks) 900 ufs_truncate_blocks(inode); 901 } 902 903 invalidate_inode_buffers(inode); 904 clear_inode(inode); 905 906 if (want_delete) 907 ufs_free_inode(inode); 908 } 909 910 struct to_free { 911 struct inode *inode; 912 u64 to; 913 unsigned count; 914 }; 915 916 static inline void free_data(struct to_free *ctx, u64 from, unsigned count) 917 { 918 if (ctx->count && ctx->to != from) { 919 ufs_free_blocks(ctx->inode, ctx->to - ctx->count, ctx->count); 920 ctx->count = 0; 921 } 922 ctx->count += count; 923 ctx->to = from + count; 924 } 925 926 #define DIRECT_BLOCK ((inode->i_size + uspi->s_bsize - 1) >> uspi->s_bshift) 927 #define DIRECT_FRAGMENT ((inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift) 928 929 static void ufs_trunc_direct(struct inode *inode) 930 { 931 struct ufs_inode_info *ufsi = UFS_I(inode); 932 struct super_block * sb; 933 struct ufs_sb_private_info * uspi; 934 void *p; 935 u64 frag1, frag2, frag3, frag4, block1, block2; 936 struct to_free ctx = {.inode = inode}; 937 unsigned i, tmp; 938 939 UFSD("ENTER: ino %lu\n", inode->i_ino); 940 941 sb = inode->i_sb; 942 uspi = UFS_SB(sb)->s_uspi; 943 944 frag1 = DIRECT_FRAGMENT; 945 frag4 = min_t(u64, UFS_NDIR_FRAGMENT, ufsi->i_lastfrag); 946 frag2 = ((frag1 & uspi->s_fpbmask) ? ((frag1 | uspi->s_fpbmask) + 1) : frag1); 947 frag3 = frag4 & ~uspi->s_fpbmask; 948 block1 = block2 = 0; 949 if (frag2 > frag3) { 950 frag2 = frag4; 951 frag3 = frag4 = 0; 952 } else if (frag2 < frag3) { 953 block1 = ufs_fragstoblks (frag2); 954 block2 = ufs_fragstoblks (frag3); 955 } 956 957 UFSD("ino %lu, frag1 %llu, frag2 %llu, block1 %llu, block2 %llu," 958 " frag3 %llu, frag4 %llu\n", inode->i_ino, 959 (unsigned long long)frag1, (unsigned long long)frag2, 960 (unsigned long long)block1, (unsigned long long)block2, 961 (unsigned long long)frag3, (unsigned long long)frag4); 962 963 if (frag1 >= frag2) 964 goto next1; 965 966 /* 967 * Free first free fragments 968 */ 969 p = ufs_get_direct_data_ptr(uspi, ufsi, ufs_fragstoblks(frag1)); 970 tmp = ufs_data_ptr_to_cpu(sb, p); 971 if (!tmp ) 972 ufs_panic (sb, "ufs_trunc_direct", "internal error"); 973 frag2 -= frag1; 974 frag1 = ufs_fragnum (frag1); 975 976 ufs_free_fragments(inode, tmp + frag1, frag2); 977 978 next1: 979 /* 980 * Free whole blocks 981 */ 982 for (i = block1 ; i < block2; i++) { 983 p = ufs_get_direct_data_ptr(uspi, ufsi, i); 984 tmp = ufs_data_ptr_to_cpu(sb, p); 985 if (!tmp) 986 continue; 987 write_seqlock(&ufsi->meta_lock); 988 ufs_data_ptr_clear(uspi, p); 989 write_sequnlock(&ufsi->meta_lock); 990 991 free_data(&ctx, tmp, uspi->s_fpb); 992 } 993 994 free_data(&ctx, 0, 0); 995 996 if (frag3 >= frag4) 997 goto next3; 998 999 /* 1000 * Free last free fragments 1001 */ 1002 p = ufs_get_direct_data_ptr(uspi, ufsi, ufs_fragstoblks(frag3)); 1003 tmp = ufs_data_ptr_to_cpu(sb, p); 1004 if (!tmp ) 1005 ufs_panic(sb, "ufs_truncate_direct", "internal error"); 1006 frag4 = ufs_fragnum (frag4); 1007 write_seqlock(&ufsi->meta_lock); 1008 ufs_data_ptr_clear(uspi, p); 1009 write_sequnlock(&ufsi->meta_lock); 1010 1011 ufs_free_fragments (inode, tmp, frag4); 1012 next3: 1013 1014 UFSD("EXIT: ino %lu\n", inode->i_ino); 1015 } 1016 1017 static void free_full_branch(struct inode *inode, u64 ind_block, int depth) 1018 { 1019 struct super_block *sb = inode->i_sb; 1020 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 1021 struct ufs_buffer_head *ubh = ubh_bread(sb, ind_block, uspi->s_bsize); 1022 unsigned i; 1023 1024 if (!ubh) 1025 return; 1026 1027 if (--depth) { 1028 for (i = 0; i < uspi->s_apb; i++) { 1029 void *p = ubh_get_data_ptr(uspi, ubh, i); 1030 u64 block = ufs_data_ptr_to_cpu(sb, p); 1031 if (block) 1032 free_full_branch(inode, block, depth); 1033 } 1034 } else { 1035 struct to_free ctx = {.inode = inode}; 1036 1037 for (i = 0; i < uspi->s_apb; i++) { 1038 void *p = ubh_get_data_ptr(uspi, ubh, i); 1039 u64 block = ufs_data_ptr_to_cpu(sb, p); 1040 if (block) 1041 free_data(&ctx, block, uspi->s_fpb); 1042 } 1043 free_data(&ctx, 0, 0); 1044 } 1045 1046 ubh_bforget(ubh); 1047 ufs_free_blocks(inode, ind_block, uspi->s_fpb); 1048 } 1049 1050 static void free_branch_tail(struct inode *inode, unsigned from, struct ufs_buffer_head *ubh, int depth) 1051 { 1052 struct super_block *sb = inode->i_sb; 1053 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 1054 unsigned i; 1055 1056 if (--depth) { 1057 for (i = from; i < uspi->s_apb ; i++) { 1058 void *p = ubh_get_data_ptr(uspi, ubh, i); 1059 u64 block = ufs_data_ptr_to_cpu(sb, p); 1060 if (block) { 1061 write_seqlock(&UFS_I(inode)->meta_lock); 1062 ufs_data_ptr_clear(uspi, p); 1063 write_sequnlock(&UFS_I(inode)->meta_lock); 1064 ubh_mark_buffer_dirty(ubh); 1065 free_full_branch(inode, block, depth); 1066 } 1067 } 1068 } else { 1069 struct to_free ctx = {.inode = inode}; 1070 1071 for (i = from; i < uspi->s_apb; i++) { 1072 void *p = ubh_get_data_ptr(uspi, ubh, i); 1073 u64 block = ufs_data_ptr_to_cpu(sb, p); 1074 if (block) { 1075 write_seqlock(&UFS_I(inode)->meta_lock); 1076 ufs_data_ptr_clear(uspi, p); 1077 write_sequnlock(&UFS_I(inode)->meta_lock); 1078 ubh_mark_buffer_dirty(ubh); 1079 free_data(&ctx, block, uspi->s_fpb); 1080 } 1081 } 1082 free_data(&ctx, 0, 0); 1083 } 1084 if (IS_SYNC(inode) && ubh_buffer_dirty(ubh)) 1085 ubh_sync_block(ubh); 1086 ubh_brelse(ubh); 1087 } 1088 1089 static int ufs_alloc_lastblock(struct inode *inode, loff_t size) 1090 { 1091 int err = 0; 1092 struct super_block *sb = inode->i_sb; 1093 struct address_space *mapping = inode->i_mapping; 1094 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 1095 unsigned i, end; 1096 sector_t lastfrag; 1097 struct page *lastpage; 1098 struct buffer_head *bh; 1099 u64 phys64; 1100 1101 lastfrag = (size + uspi->s_fsize - 1) >> uspi->s_fshift; 1102 1103 if (!lastfrag) 1104 goto out; 1105 1106 lastfrag--; 1107 1108 lastpage = ufs_get_locked_page(mapping, lastfrag >> 1109 (PAGE_CACHE_SHIFT - inode->i_blkbits)); 1110 if (IS_ERR(lastpage)) { 1111 err = -EIO; 1112 goto out; 1113 } 1114 1115 end = lastfrag & ((1 << (PAGE_CACHE_SHIFT - inode->i_blkbits)) - 1); 1116 bh = page_buffers(lastpage); 1117 for (i = 0; i < end; ++i) 1118 bh = bh->b_this_page; 1119 1120 1121 err = ufs_getfrag_block(inode, lastfrag, bh, 1); 1122 1123 if (unlikely(err)) 1124 goto out_unlock; 1125 1126 if (buffer_new(bh)) { 1127 clear_buffer_new(bh); 1128 unmap_underlying_metadata(bh->b_bdev, 1129 bh->b_blocknr); 1130 /* 1131 * we do not zeroize fragment, because of 1132 * if it maped to hole, it already contains zeroes 1133 */ 1134 set_buffer_uptodate(bh); 1135 mark_buffer_dirty(bh); 1136 set_page_dirty(lastpage); 1137 } 1138 1139 if (lastfrag >= UFS_IND_FRAGMENT) { 1140 end = uspi->s_fpb - ufs_fragnum(lastfrag) - 1; 1141 phys64 = bh->b_blocknr + 1; 1142 for (i = 0; i < end; ++i) { 1143 bh = sb_getblk(sb, i + phys64); 1144 lock_buffer(bh); 1145 memset(bh->b_data, 0, sb->s_blocksize); 1146 set_buffer_uptodate(bh); 1147 mark_buffer_dirty(bh); 1148 unlock_buffer(bh); 1149 sync_dirty_buffer(bh); 1150 brelse(bh); 1151 } 1152 } 1153 out_unlock: 1154 ufs_put_locked_page(lastpage); 1155 out: 1156 return err; 1157 } 1158 1159 static void __ufs_truncate_blocks(struct inode *inode) 1160 { 1161 struct ufs_inode_info *ufsi = UFS_I(inode); 1162 struct super_block *sb = inode->i_sb; 1163 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 1164 unsigned offsets[4]; 1165 int depth = ufs_block_to_path(inode, DIRECT_BLOCK, offsets); 1166 int depth2; 1167 unsigned i; 1168 struct ufs_buffer_head *ubh[3]; 1169 void *p; 1170 u64 block; 1171 1172 if (!depth) 1173 return; 1174 1175 /* find the last non-zero in offsets[] */ 1176 for (depth2 = depth - 1; depth2; depth2--) 1177 if (offsets[depth2]) 1178 break; 1179 1180 mutex_lock(&ufsi->truncate_mutex); 1181 if (depth == 1) { 1182 ufs_trunc_direct(inode); 1183 offsets[0] = UFS_IND_BLOCK; 1184 } else { 1185 /* get the blocks that should be partially emptied */ 1186 p = ufs_get_direct_data_ptr(uspi, ufsi, offsets[0]); 1187 for (i = 0; i < depth2; i++) { 1188 offsets[i]++; /* next branch is fully freed */ 1189 block = ufs_data_ptr_to_cpu(sb, p); 1190 if (!block) 1191 break; 1192 ubh[i] = ubh_bread(sb, block, uspi->s_bsize); 1193 if (!ubh[i]) { 1194 write_seqlock(&ufsi->meta_lock); 1195 ufs_data_ptr_clear(uspi, p); 1196 write_sequnlock(&ufsi->meta_lock); 1197 break; 1198 } 1199 p = ubh_get_data_ptr(uspi, ubh[i], offsets[i + 1]); 1200 } 1201 while (i--) 1202 free_branch_tail(inode, offsets[i + 1], ubh[i], depth - i - 1); 1203 } 1204 for (i = offsets[0]; i <= UFS_TIND_BLOCK; i++) { 1205 p = ufs_get_direct_data_ptr(uspi, ufsi, i); 1206 block = ufs_data_ptr_to_cpu(sb, p); 1207 if (block) { 1208 write_seqlock(&ufsi->meta_lock); 1209 ufs_data_ptr_clear(uspi, p); 1210 write_sequnlock(&ufsi->meta_lock); 1211 free_full_branch(inode, block, i - UFS_IND_BLOCK + 1); 1212 } 1213 } 1214 ufsi->i_lastfrag = DIRECT_FRAGMENT; 1215 mark_inode_dirty(inode); 1216 mutex_unlock(&ufsi->truncate_mutex); 1217 } 1218 1219 static int ufs_truncate(struct inode *inode, loff_t size) 1220 { 1221 int err = 0; 1222 1223 UFSD("ENTER: ino %lu, i_size: %llu, old_i_size: %llu\n", 1224 inode->i_ino, (unsigned long long)size, 1225 (unsigned long long)i_size_read(inode)); 1226 1227 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || 1228 S_ISLNK(inode->i_mode))) 1229 return -EINVAL; 1230 if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) 1231 return -EPERM; 1232 1233 err = ufs_alloc_lastblock(inode, size); 1234 1235 if (err) 1236 goto out; 1237 1238 block_truncate_page(inode->i_mapping, size, ufs_getfrag_block); 1239 1240 truncate_setsize(inode, size); 1241 1242 __ufs_truncate_blocks(inode); 1243 inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC; 1244 mark_inode_dirty(inode); 1245 out: 1246 UFSD("EXIT: err %d\n", err); 1247 return err; 1248 } 1249 1250 void ufs_truncate_blocks(struct inode *inode) 1251 { 1252 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || 1253 S_ISLNK(inode->i_mode))) 1254 return; 1255 if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) 1256 return; 1257 __ufs_truncate_blocks(inode); 1258 } 1259 1260 int ufs_setattr(struct dentry *dentry, struct iattr *attr) 1261 { 1262 struct inode *inode = d_inode(dentry); 1263 unsigned int ia_valid = attr->ia_valid; 1264 int error; 1265 1266 error = inode_change_ok(inode, attr); 1267 if (error) 1268 return error; 1269 1270 if (ia_valid & ATTR_SIZE && attr->ia_size != inode->i_size) { 1271 error = ufs_truncate(inode, attr->ia_size); 1272 if (error) 1273 return error; 1274 } 1275 1276 setattr_copy(inode, attr); 1277 mark_inode_dirty(inode); 1278 return 0; 1279 } 1280 1281 const struct inode_operations ufs_file_inode_operations = { 1282 .setattr = ufs_setattr, 1283 }; 1284