1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * linux/fs/ufs/inode.c 4 * 5 * Copyright (C) 1998 6 * Daniel Pirkl <daniel.pirkl@email.cz> 7 * Charles University, Faculty of Mathematics and Physics 8 * 9 * from 10 * 11 * linux/fs/ext2/inode.c 12 * 13 * Copyright (C) 1992, 1993, 1994, 1995 14 * Remy Card (card@masi.ibp.fr) 15 * Laboratoire MASI - Institut Blaise Pascal 16 * Universite Pierre et Marie Curie (Paris VI) 17 * 18 * from 19 * 20 * linux/fs/minix/inode.c 21 * 22 * Copyright (C) 1991, 1992 Linus Torvalds 23 * 24 * Goal-directed block allocation by Stephen Tweedie (sct@dcs.ed.ac.uk), 1993 25 * Big-endian to little-endian byte-swapping/bitmaps by 26 * David S. Miller (davem@caip.rutgers.edu), 1995 27 */ 28 29 #include <linux/uaccess.h> 30 31 #include <linux/errno.h> 32 #include <linux/fs.h> 33 #include <linux/time.h> 34 #include <linux/stat.h> 35 #include <linux/string.h> 36 #include <linux/mm.h> 37 #include <linux/buffer_head.h> 38 #include <linux/mpage.h> 39 #include <linux/writeback.h> 40 #include <linux/iversion.h> 41 42 #include "ufs_fs.h" 43 #include "ufs.h" 44 #include "swab.h" 45 #include "util.h" 46 47 static int ufs_block_to_path(struct inode *inode, sector_t i_block, unsigned offsets[4]) 48 { 49 struct ufs_sb_private_info *uspi = UFS_SB(inode->i_sb)->s_uspi; 50 int ptrs = uspi->s_apb; 51 int ptrs_bits = uspi->s_apbshift; 52 const long direct_blocks = UFS_NDADDR, 53 indirect_blocks = ptrs, 54 double_blocks = (1 << (ptrs_bits * 2)); 55 int n = 0; 56 57 58 UFSD("ptrs=uspi->s_apb = %d,double_blocks=%ld \n",ptrs,double_blocks); 59 if (i_block < direct_blocks) { 60 offsets[n++] = i_block; 61 } else if ((i_block -= direct_blocks) < indirect_blocks) { 62 offsets[n++] = UFS_IND_BLOCK; 63 offsets[n++] = i_block; 64 } else if ((i_block -= indirect_blocks) < double_blocks) { 65 offsets[n++] = UFS_DIND_BLOCK; 66 offsets[n++] = i_block >> ptrs_bits; 67 offsets[n++] = i_block & (ptrs - 1); 68 } else if (((i_block -= double_blocks) >> (ptrs_bits * 2)) < ptrs) { 69 offsets[n++] = UFS_TIND_BLOCK; 70 offsets[n++] = i_block >> (ptrs_bits * 2); 71 offsets[n++] = (i_block >> ptrs_bits) & (ptrs - 1); 72 offsets[n++] = i_block & (ptrs - 1); 73 } else { 74 ufs_warning(inode->i_sb, "ufs_block_to_path", "block > big"); 75 } 76 return n; 77 } 78 79 typedef struct { 80 void *p; 81 union { 82 __fs32 key32; 83 __fs64 key64; 84 }; 85 struct buffer_head *bh; 86 } Indirect; 87 88 static inline int grow_chain32(struct ufs_inode_info *ufsi, 89 struct buffer_head *bh, __fs32 *v, 90 Indirect *from, Indirect *to) 91 { 92 Indirect *p; 93 unsigned seq; 94 to->bh = bh; 95 do { 96 seq = read_seqbegin(&ufsi->meta_lock); 97 to->key32 = *(__fs32 *)(to->p = v); 98 for (p = from; p <= to && p->key32 == *(__fs32 *)p->p; p++) 99 ; 100 } while (read_seqretry(&ufsi->meta_lock, seq)); 101 return (p > to); 102 } 103 104 static inline int grow_chain64(struct ufs_inode_info *ufsi, 105 struct buffer_head *bh, __fs64 *v, 106 Indirect *from, Indirect *to) 107 { 108 Indirect *p; 109 unsigned seq; 110 to->bh = bh; 111 do { 112 seq = read_seqbegin(&ufsi->meta_lock); 113 to->key64 = *(__fs64 *)(to->p = v); 114 for (p = from; p <= to && p->key64 == *(__fs64 *)p->p; p++) 115 ; 116 } while (read_seqretry(&ufsi->meta_lock, seq)); 117 return (p > to); 118 } 119 120 /* 121 * Returns the location of the fragment from 122 * the beginning of the filesystem. 123 */ 124 125 static u64 ufs_frag_map(struct inode *inode, unsigned offsets[4], int depth) 126 { 127 struct ufs_inode_info *ufsi = UFS_I(inode); 128 struct super_block *sb = inode->i_sb; 129 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 130 u64 mask = (u64) uspi->s_apbmask>>uspi->s_fpbshift; 131 int shift = uspi->s_apbshift-uspi->s_fpbshift; 132 Indirect chain[4], *q = chain; 133 unsigned *p; 134 unsigned flags = UFS_SB(sb)->s_flags; 135 u64 res = 0; 136 137 UFSD(": uspi->s_fpbshift = %d ,uspi->s_apbmask = %x, mask=%llx\n", 138 uspi->s_fpbshift, uspi->s_apbmask, 139 (unsigned long long)mask); 140 141 if (depth == 0) 142 goto no_block; 143 144 again: 145 p = offsets; 146 147 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) 148 goto ufs2; 149 150 if (!grow_chain32(ufsi, NULL, &ufsi->i_u1.i_data[*p++], chain, q)) 151 goto changed; 152 if (!q->key32) 153 goto no_block; 154 while (--depth) { 155 __fs32 *ptr; 156 struct buffer_head *bh; 157 unsigned n = *p++; 158 159 bh = sb_bread(sb, uspi->s_sbbase + 160 fs32_to_cpu(sb, q->key32) + (n>>shift)); 161 if (!bh) 162 goto no_block; 163 ptr = (__fs32 *)bh->b_data + (n & mask); 164 if (!grow_chain32(ufsi, bh, ptr, chain, ++q)) 165 goto changed; 166 if (!q->key32) 167 goto no_block; 168 } 169 res = fs32_to_cpu(sb, q->key32); 170 goto found; 171 172 ufs2: 173 if (!grow_chain64(ufsi, NULL, &ufsi->i_u1.u2_i_data[*p++], chain, q)) 174 goto changed; 175 if (!q->key64) 176 goto no_block; 177 178 while (--depth) { 179 __fs64 *ptr; 180 struct buffer_head *bh; 181 unsigned n = *p++; 182 183 bh = sb_bread(sb, uspi->s_sbbase + 184 fs64_to_cpu(sb, q->key64) + (n>>shift)); 185 if (!bh) 186 goto no_block; 187 ptr = (__fs64 *)bh->b_data + (n & mask); 188 if (!grow_chain64(ufsi, bh, ptr, chain, ++q)) 189 goto changed; 190 if (!q->key64) 191 goto no_block; 192 } 193 res = fs64_to_cpu(sb, q->key64); 194 found: 195 res += uspi->s_sbbase; 196 no_block: 197 while (q > chain) { 198 brelse(q->bh); 199 q--; 200 } 201 return res; 202 203 changed: 204 while (q > chain) { 205 brelse(q->bh); 206 q--; 207 } 208 goto again; 209 } 210 211 /* 212 * Unpacking tails: we have a file with partial final block and 213 * we had been asked to extend it. If the fragment being written 214 * is within the same block, we need to extend the tail just to cover 215 * that fragment. Otherwise the tail is extended to full block. 216 * 217 * Note that we might need to create a _new_ tail, but that will 218 * be handled elsewhere; this is strictly for resizing old 219 * ones. 220 */ 221 static bool 222 ufs_extend_tail(struct inode *inode, u64 writes_to, 223 int *err, struct folio *locked_folio) 224 { 225 struct ufs_inode_info *ufsi = UFS_I(inode); 226 struct super_block *sb = inode->i_sb; 227 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 228 unsigned lastfrag = ufsi->i_lastfrag; /* it's a short file, so unsigned is enough */ 229 unsigned block = ufs_fragstoblks(lastfrag); 230 unsigned new_size; 231 void *p; 232 u64 tmp; 233 234 if (writes_to < (lastfrag | uspi->s_fpbmask)) 235 new_size = (writes_to & uspi->s_fpbmask) + 1; 236 else 237 new_size = uspi->s_fpb; 238 239 p = ufs_get_direct_data_ptr(uspi, ufsi, block); 240 tmp = ufs_new_fragments(inode, p, lastfrag, ufs_data_ptr_to_cpu(sb, p), 241 new_size - (lastfrag & uspi->s_fpbmask), err, 242 locked_folio); 243 return tmp != 0; 244 } 245 246 /** 247 * ufs_inode_getfrag() - allocate new fragment(s) 248 * @inode: pointer to inode 249 * @index: number of block pointer within the inode's array. 250 * @new_fragment: number of new allocated fragment(s) 251 * @err: we set it if something wrong 252 * @new: we set it if we allocate new block 253 * @locked_folio: for ufs_new_fragments() 254 */ 255 static u64 ufs_inode_getfrag(struct inode *inode, unsigned index, 256 sector_t new_fragment, int *err, 257 int *new, struct folio *locked_folio) 258 { 259 struct ufs_inode_info *ufsi = UFS_I(inode); 260 struct super_block *sb = inode->i_sb; 261 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 262 u64 tmp, goal, lastfrag; 263 unsigned nfrags = uspi->s_fpb; 264 void *p; 265 266 p = ufs_get_direct_data_ptr(uspi, ufsi, index); 267 tmp = ufs_data_ptr_to_cpu(sb, p); 268 if (tmp) 269 goto out; 270 271 lastfrag = ufsi->i_lastfrag; 272 273 /* will that be a new tail? */ 274 if (new_fragment < UFS_NDIR_FRAGMENT && new_fragment >= lastfrag) 275 nfrags = (new_fragment & uspi->s_fpbmask) + 1; 276 277 goal = 0; 278 if (index) { 279 goal = ufs_data_ptr_to_cpu(sb, 280 ufs_get_direct_data_ptr(uspi, ufsi, index - 1)); 281 if (goal) 282 goal += uspi->s_fpb; 283 } 284 tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), 285 goal, nfrags, err, locked_folio); 286 287 if (!tmp) { 288 *err = -ENOSPC; 289 return 0; 290 } 291 292 if (new) 293 *new = 1; 294 inode_set_ctime_current(inode); 295 if (IS_SYNC(inode)) 296 ufs_sync_inode (inode); 297 mark_inode_dirty(inode); 298 out: 299 return tmp + uspi->s_sbbase; 300 } 301 302 /** 303 * ufs_inode_getblock() - allocate new block 304 * @inode: pointer to inode 305 * @ind_block: block number of the indirect block 306 * @index: number of pointer within the indirect block 307 * @new_fragment: number of new allocated fragment 308 * (block will hold this fragment and also uspi->s_fpb-1) 309 * @err: see ufs_inode_getfrag() 310 * @new: see ufs_inode_getfrag() 311 * @locked_folio: see ufs_inode_getfrag() 312 */ 313 static u64 ufs_inode_getblock(struct inode *inode, u64 ind_block, 314 unsigned index, sector_t new_fragment, int *err, 315 int *new, struct folio *locked_folio) 316 { 317 struct super_block *sb = inode->i_sb; 318 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 319 int shift = uspi->s_apbshift - uspi->s_fpbshift; 320 u64 tmp = 0, goal; 321 struct buffer_head *bh; 322 void *p; 323 324 if (!ind_block) 325 return 0; 326 327 bh = sb_bread(sb, ind_block + (index >> shift)); 328 if (unlikely(!bh)) { 329 *err = -EIO; 330 return 0; 331 } 332 333 index &= uspi->s_apbmask >> uspi->s_fpbshift; 334 if (uspi->fs_magic == UFS2_MAGIC) 335 p = (__fs64 *)bh->b_data + index; 336 else 337 p = (__fs32 *)bh->b_data + index; 338 339 tmp = ufs_data_ptr_to_cpu(sb, p); 340 if (tmp) 341 goto out; 342 343 if (index && (uspi->fs_magic == UFS2_MAGIC ? 344 (tmp = fs64_to_cpu(sb, ((__fs64 *)bh->b_data)[index-1])) : 345 (tmp = fs32_to_cpu(sb, ((__fs32 *)bh->b_data)[index-1])))) 346 goal = tmp + uspi->s_fpb; 347 else 348 goal = bh->b_blocknr + uspi->s_fpb; 349 tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), goal, 350 uspi->s_fpb, err, locked_folio); 351 if (!tmp) 352 goto out; 353 354 if (new) 355 *new = 1; 356 357 mark_buffer_dirty(bh); 358 if (IS_SYNC(inode)) 359 sync_dirty_buffer(bh); 360 inode_set_ctime_current(inode); 361 mark_inode_dirty(inode); 362 out: 363 brelse (bh); 364 UFSD("EXIT\n"); 365 if (tmp) 366 tmp += uspi->s_sbbase; 367 return tmp; 368 } 369 370 /** 371 * ufs_getfrag_block() - `get_block_t' function, interface between UFS and 372 * read_folio, writepages and so on 373 */ 374 375 static int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create) 376 { 377 struct super_block *sb = inode->i_sb; 378 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 379 int err = 0, new = 0; 380 unsigned offsets[4]; 381 int depth = ufs_block_to_path(inode, fragment >> uspi->s_fpbshift, offsets); 382 u64 phys64 = 0; 383 unsigned frag = fragment & uspi->s_fpbmask; 384 385 phys64 = ufs_frag_map(inode, offsets, depth); 386 if (!create) 387 goto done; 388 389 if (phys64) { 390 if (fragment >= UFS_NDIR_FRAGMENT) 391 goto done; 392 read_seqlock_excl(&UFS_I(inode)->meta_lock); 393 if (fragment < UFS_I(inode)->i_lastfrag) { 394 read_sequnlock_excl(&UFS_I(inode)->meta_lock); 395 goto done; 396 } 397 read_sequnlock_excl(&UFS_I(inode)->meta_lock); 398 } 399 /* This code entered only while writing ....? */ 400 401 mutex_lock(&UFS_I(inode)->truncate_mutex); 402 403 UFSD("ENTER, ino %lu, fragment %llu\n", inode->i_ino, (unsigned long long)fragment); 404 if (unlikely(!depth)) { 405 ufs_warning(sb, "ufs_get_block", "block > big"); 406 err = -EIO; 407 goto out; 408 } 409 410 if (UFS_I(inode)->i_lastfrag < UFS_NDIR_FRAGMENT) { 411 unsigned lastfrag = UFS_I(inode)->i_lastfrag; 412 unsigned tailfrags = lastfrag & uspi->s_fpbmask; 413 if (tailfrags && fragment >= lastfrag) { 414 if (!ufs_extend_tail(inode, fragment, 415 &err, bh_result->b_folio)) 416 goto out; 417 } 418 } 419 420 if (depth == 1) { 421 phys64 = ufs_inode_getfrag(inode, offsets[0], fragment, 422 &err, &new, bh_result->b_folio); 423 } else { 424 int i; 425 phys64 = ufs_inode_getfrag(inode, offsets[0], fragment, 426 &err, NULL, NULL); 427 for (i = 1; i < depth - 1; i++) 428 phys64 = ufs_inode_getblock(inode, phys64, offsets[i], 429 fragment, &err, NULL, NULL); 430 phys64 = ufs_inode_getblock(inode, phys64, offsets[depth - 1], 431 fragment, &err, &new, bh_result->b_folio); 432 } 433 out: 434 if (phys64) { 435 phys64 += frag; 436 map_bh(bh_result, sb, phys64); 437 if (new) 438 set_buffer_new(bh_result); 439 } 440 mutex_unlock(&UFS_I(inode)->truncate_mutex); 441 return err; 442 443 done: 444 if (phys64) 445 map_bh(bh_result, sb, phys64 + frag); 446 return 0; 447 } 448 449 static int ufs_writepages(struct address_space *mapping, 450 struct writeback_control *wbc) 451 { 452 return mpage_writepages(mapping, wbc, ufs_getfrag_block); 453 } 454 455 static int ufs_read_folio(struct file *file, struct folio *folio) 456 { 457 return block_read_full_folio(folio, ufs_getfrag_block); 458 } 459 460 int ufs_prepare_chunk(struct folio *folio, loff_t pos, unsigned len) 461 { 462 return __block_write_begin(folio, pos, len, ufs_getfrag_block); 463 } 464 465 static void ufs_truncate_blocks(struct inode *); 466 467 static void ufs_write_failed(struct address_space *mapping, loff_t to) 468 { 469 struct inode *inode = mapping->host; 470 471 if (to > inode->i_size) { 472 truncate_pagecache(inode, inode->i_size); 473 ufs_truncate_blocks(inode); 474 } 475 } 476 477 static int ufs_write_begin(struct file *file, struct address_space *mapping, 478 loff_t pos, unsigned len, 479 struct folio **foliop, void **fsdata) 480 { 481 int ret; 482 483 ret = block_write_begin(mapping, pos, len, foliop, ufs_getfrag_block); 484 if (unlikely(ret)) 485 ufs_write_failed(mapping, pos + len); 486 487 return ret; 488 } 489 490 static int ufs_write_end(struct file *file, struct address_space *mapping, 491 loff_t pos, unsigned len, unsigned copied, 492 struct folio *folio, void *fsdata) 493 { 494 int ret; 495 496 ret = generic_write_end(file, mapping, pos, len, copied, folio, fsdata); 497 if (ret < len) 498 ufs_write_failed(mapping, pos + len); 499 return ret; 500 } 501 502 static sector_t ufs_bmap(struct address_space *mapping, sector_t block) 503 { 504 return generic_block_bmap(mapping,block,ufs_getfrag_block); 505 } 506 507 const struct address_space_operations ufs_aops = { 508 .dirty_folio = block_dirty_folio, 509 .invalidate_folio = block_invalidate_folio, 510 .read_folio = ufs_read_folio, 511 .writepages = ufs_writepages, 512 .write_begin = ufs_write_begin, 513 .write_end = ufs_write_end, 514 .migrate_folio = buffer_migrate_folio, 515 .bmap = ufs_bmap 516 }; 517 518 static void ufs_set_inode_ops(struct inode *inode) 519 { 520 if (S_ISREG(inode->i_mode)) { 521 inode->i_op = &ufs_file_inode_operations; 522 inode->i_fop = &ufs_file_operations; 523 inode->i_mapping->a_ops = &ufs_aops; 524 } else if (S_ISDIR(inode->i_mode)) { 525 inode->i_op = &ufs_dir_inode_operations; 526 inode->i_fop = &ufs_dir_operations; 527 inode->i_mapping->a_ops = &ufs_aops; 528 } else if (S_ISLNK(inode->i_mode)) { 529 if (!inode->i_blocks) { 530 inode->i_link = (char *)UFS_I(inode)->i_u1.i_symlink; 531 inode->i_op = &simple_symlink_inode_operations; 532 } else { 533 inode->i_mapping->a_ops = &ufs_aops; 534 inode->i_op = &page_symlink_inode_operations; 535 inode_nohighmem(inode); 536 } 537 } else 538 init_special_inode(inode, inode->i_mode, 539 ufs_get_inode_dev(inode->i_sb, UFS_I(inode))); 540 } 541 542 static int ufs1_read_inode(struct inode *inode, struct ufs_inode *ufs_inode) 543 { 544 struct ufs_inode_info *ufsi = UFS_I(inode); 545 struct super_block *sb = inode->i_sb; 546 umode_t mode; 547 548 /* 549 * Copy data to the in-core inode. 550 */ 551 inode->i_mode = mode = fs16_to_cpu(sb, ufs_inode->ui_mode); 552 set_nlink(inode, fs16_to_cpu(sb, ufs_inode->ui_nlink)); 553 if (inode->i_nlink == 0) 554 return -ESTALE; 555 556 /* 557 * Linux now has 32-bit uid and gid, so we can support EFT. 558 */ 559 i_uid_write(inode, ufs_get_inode_uid(sb, ufs_inode)); 560 i_gid_write(inode, ufs_get_inode_gid(sb, ufs_inode)); 561 562 inode->i_size = fs64_to_cpu(sb, ufs_inode->ui_size); 563 inode_set_atime(inode, 564 (signed)fs32_to_cpu(sb, ufs_inode->ui_atime.tv_sec), 565 0); 566 inode_set_ctime(inode, 567 (signed)fs32_to_cpu(sb, ufs_inode->ui_ctime.tv_sec), 568 0); 569 inode_set_mtime(inode, 570 (signed)fs32_to_cpu(sb, ufs_inode->ui_mtime.tv_sec), 571 0); 572 inode->i_blocks = fs32_to_cpu(sb, ufs_inode->ui_blocks); 573 inode->i_generation = fs32_to_cpu(sb, ufs_inode->ui_gen); 574 ufsi->i_flags = fs32_to_cpu(sb, ufs_inode->ui_flags); 575 ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); 576 ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); 577 578 579 if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { 580 memcpy(ufsi->i_u1.i_data, &ufs_inode->ui_u2.ui_addr, 581 sizeof(ufs_inode->ui_u2.ui_addr)); 582 } else { 583 memcpy(ufsi->i_u1.i_symlink, ufs_inode->ui_u2.ui_symlink, 584 sizeof(ufs_inode->ui_u2.ui_symlink) - 1); 585 ufsi->i_u1.i_symlink[sizeof(ufs_inode->ui_u2.ui_symlink) - 1] = 0; 586 } 587 return 0; 588 } 589 590 static int ufs2_read_inode(struct inode *inode, struct ufs2_inode *ufs2_inode) 591 { 592 struct ufs_inode_info *ufsi = UFS_I(inode); 593 struct super_block *sb = inode->i_sb; 594 umode_t mode; 595 596 UFSD("Reading ufs2 inode, ino %lu\n", inode->i_ino); 597 /* 598 * Copy data to the in-core inode. 599 */ 600 inode->i_mode = mode = fs16_to_cpu(sb, ufs2_inode->ui_mode); 601 set_nlink(inode, fs16_to_cpu(sb, ufs2_inode->ui_nlink)); 602 if (inode->i_nlink == 0) 603 return -ESTALE; 604 605 /* 606 * Linux now has 32-bit uid and gid, so we can support EFT. 607 */ 608 i_uid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_uid)); 609 i_gid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_gid)); 610 611 inode->i_size = fs64_to_cpu(sb, ufs2_inode->ui_size); 612 inode_set_atime(inode, fs64_to_cpu(sb, ufs2_inode->ui_atime), 613 fs32_to_cpu(sb, ufs2_inode->ui_atimensec)); 614 inode_set_ctime(inode, fs64_to_cpu(sb, ufs2_inode->ui_ctime), 615 fs32_to_cpu(sb, ufs2_inode->ui_ctimensec)); 616 inode_set_mtime(inode, fs64_to_cpu(sb, ufs2_inode->ui_mtime), 617 fs32_to_cpu(sb, ufs2_inode->ui_mtimensec)); 618 inode->i_blocks = fs64_to_cpu(sb, ufs2_inode->ui_blocks); 619 inode->i_generation = fs32_to_cpu(sb, ufs2_inode->ui_gen); 620 ufsi->i_flags = fs32_to_cpu(sb, ufs2_inode->ui_flags); 621 /* 622 ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); 623 ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); 624 */ 625 626 if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { 627 memcpy(ufsi->i_u1.u2_i_data, &ufs2_inode->ui_u2.ui_addr, 628 sizeof(ufs2_inode->ui_u2.ui_addr)); 629 } else { 630 memcpy(ufsi->i_u1.i_symlink, ufs2_inode->ui_u2.ui_symlink, 631 sizeof(ufs2_inode->ui_u2.ui_symlink) - 1); 632 ufsi->i_u1.i_symlink[sizeof(ufs2_inode->ui_u2.ui_symlink) - 1] = 0; 633 } 634 return 0; 635 } 636 637 struct inode *ufs_iget(struct super_block *sb, unsigned long ino) 638 { 639 struct ufs_inode_info *ufsi; 640 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 641 struct buffer_head * bh; 642 struct inode *inode; 643 int err = -EIO; 644 645 UFSD("ENTER, ino %lu\n", ino); 646 647 if (ino < UFS_ROOTINO || ino > (uspi->s_ncg * uspi->s_ipg)) { 648 ufs_warning(sb, "ufs_read_inode", "bad inode number (%lu)\n", 649 ino); 650 return ERR_PTR(-EIO); 651 } 652 653 inode = iget_locked(sb, ino); 654 if (!inode) 655 return ERR_PTR(-ENOMEM); 656 if (!(inode->i_state & I_NEW)) 657 return inode; 658 659 ufsi = UFS_I(inode); 660 661 bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino)); 662 if (!bh) { 663 ufs_warning(sb, "ufs_read_inode", "unable to read inode %lu\n", 664 inode->i_ino); 665 goto bad_inode; 666 } 667 if ((UFS_SB(sb)->s_flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { 668 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data; 669 670 err = ufs2_read_inode(inode, 671 ufs2_inode + ufs_inotofsbo(inode->i_ino)); 672 } else { 673 struct ufs_inode *ufs_inode = (struct ufs_inode *)bh->b_data; 674 675 err = ufs1_read_inode(inode, 676 ufs_inode + ufs_inotofsbo(inode->i_ino)); 677 } 678 brelse(bh); 679 if (err) 680 goto bad_inode; 681 682 inode_inc_iversion(inode); 683 ufsi->i_lastfrag = 684 (inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift; 685 ufsi->i_dir_start_lookup = 0; 686 ufsi->i_osync = 0; 687 688 ufs_set_inode_ops(inode); 689 690 UFSD("EXIT\n"); 691 unlock_new_inode(inode); 692 return inode; 693 694 bad_inode: 695 iget_failed(inode); 696 return ERR_PTR(err); 697 } 698 699 static void ufs1_update_inode(struct inode *inode, struct ufs_inode *ufs_inode) 700 { 701 struct super_block *sb = inode->i_sb; 702 struct ufs_inode_info *ufsi = UFS_I(inode); 703 704 ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode); 705 ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink); 706 707 ufs_set_inode_uid(sb, ufs_inode, i_uid_read(inode)); 708 ufs_set_inode_gid(sb, ufs_inode, i_gid_read(inode)); 709 710 ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size); 711 ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb, 712 inode_get_atime_sec(inode)); 713 ufs_inode->ui_atime.tv_usec = 0; 714 ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb, 715 inode_get_ctime_sec(inode)); 716 ufs_inode->ui_ctime.tv_usec = 0; 717 ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb, 718 inode_get_mtime_sec(inode)); 719 ufs_inode->ui_mtime.tv_usec = 0; 720 ufs_inode->ui_blocks = cpu_to_fs32(sb, inode->i_blocks); 721 ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags); 722 ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation); 723 724 if ((UFS_SB(sb)->s_flags & UFS_UID_MASK) == UFS_UID_EFT) { 725 ufs_inode->ui_u3.ui_sun.ui_shadow = cpu_to_fs32(sb, ufsi->i_shadow); 726 ufs_inode->ui_u3.ui_sun.ui_oeftflag = cpu_to_fs32(sb, ufsi->i_oeftflag); 727 } 728 729 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { 730 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */ 731 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.i_data[0]; 732 } else if (inode->i_blocks) { 733 memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.i_data, 734 sizeof(ufs_inode->ui_u2.ui_addr)); 735 } 736 else { 737 memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink, 738 sizeof(ufs_inode->ui_u2.ui_symlink)); 739 } 740 741 if (!inode->i_nlink) 742 memset (ufs_inode, 0, sizeof(struct ufs_inode)); 743 } 744 745 static void ufs2_update_inode(struct inode *inode, struct ufs2_inode *ufs_inode) 746 { 747 struct super_block *sb = inode->i_sb; 748 struct ufs_inode_info *ufsi = UFS_I(inode); 749 750 UFSD("ENTER\n"); 751 ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode); 752 ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink); 753 754 ufs_inode->ui_uid = cpu_to_fs32(sb, i_uid_read(inode)); 755 ufs_inode->ui_gid = cpu_to_fs32(sb, i_gid_read(inode)); 756 757 ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size); 758 ufs_inode->ui_atime = cpu_to_fs64(sb, inode_get_atime_sec(inode)); 759 ufs_inode->ui_atimensec = cpu_to_fs32(sb, 760 inode_get_atime_nsec(inode)); 761 ufs_inode->ui_ctime = cpu_to_fs64(sb, inode_get_ctime_sec(inode)); 762 ufs_inode->ui_ctimensec = cpu_to_fs32(sb, 763 inode_get_ctime_nsec(inode)); 764 ufs_inode->ui_mtime = cpu_to_fs64(sb, inode_get_mtime_sec(inode)); 765 ufs_inode->ui_mtimensec = cpu_to_fs32(sb, 766 inode_get_mtime_nsec(inode)); 767 768 ufs_inode->ui_blocks = cpu_to_fs64(sb, inode->i_blocks); 769 ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags); 770 ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation); 771 772 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { 773 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */ 774 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.u2_i_data[0]; 775 } else if (inode->i_blocks) { 776 memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.u2_i_data, 777 sizeof(ufs_inode->ui_u2.ui_addr)); 778 } else { 779 memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink, 780 sizeof(ufs_inode->ui_u2.ui_symlink)); 781 } 782 783 if (!inode->i_nlink) 784 memset (ufs_inode, 0, sizeof(struct ufs2_inode)); 785 UFSD("EXIT\n"); 786 } 787 788 static int ufs_update_inode(struct inode * inode, int do_sync) 789 { 790 struct super_block *sb = inode->i_sb; 791 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 792 struct buffer_head * bh; 793 794 UFSD("ENTER, ino %lu\n", inode->i_ino); 795 796 if (inode->i_ino < UFS_ROOTINO || 797 inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) { 798 ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino); 799 return -1; 800 } 801 802 bh = sb_bread(sb, ufs_inotofsba(inode->i_ino)); 803 if (!bh) { 804 ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino); 805 return -1; 806 } 807 if (uspi->fs_magic == UFS2_MAGIC) { 808 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data; 809 810 ufs2_update_inode(inode, 811 ufs2_inode + ufs_inotofsbo(inode->i_ino)); 812 } else { 813 struct ufs_inode *ufs_inode = (struct ufs_inode *) bh->b_data; 814 815 ufs1_update_inode(inode, ufs_inode + ufs_inotofsbo(inode->i_ino)); 816 } 817 818 mark_buffer_dirty(bh); 819 if (do_sync) 820 sync_dirty_buffer(bh); 821 brelse (bh); 822 823 UFSD("EXIT\n"); 824 return 0; 825 } 826 827 int ufs_write_inode(struct inode *inode, struct writeback_control *wbc) 828 { 829 return ufs_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL); 830 } 831 832 int ufs_sync_inode (struct inode *inode) 833 { 834 return ufs_update_inode (inode, 1); 835 } 836 837 void ufs_evict_inode(struct inode * inode) 838 { 839 int want_delete = 0; 840 841 if (!inode->i_nlink && !is_bad_inode(inode)) 842 want_delete = 1; 843 844 truncate_inode_pages_final(&inode->i_data); 845 if (want_delete) { 846 inode->i_size = 0; 847 if (inode->i_blocks && 848 (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || 849 S_ISLNK(inode->i_mode))) 850 ufs_truncate_blocks(inode); 851 ufs_update_inode(inode, inode_needs_sync(inode)); 852 } 853 854 invalidate_inode_buffers(inode); 855 clear_inode(inode); 856 857 if (want_delete) 858 ufs_free_inode(inode); 859 } 860 861 struct to_free { 862 struct inode *inode; 863 u64 to; 864 unsigned count; 865 }; 866 867 static inline void free_data(struct to_free *ctx, u64 from, unsigned count) 868 { 869 if (ctx->count && ctx->to != from) { 870 ufs_free_blocks(ctx->inode, ctx->to - ctx->count, ctx->count); 871 ctx->count = 0; 872 } 873 ctx->count += count; 874 ctx->to = from + count; 875 } 876 877 #define DIRECT_FRAGMENT ((inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift) 878 879 /* 880 * used only for truncation down to direct blocks. 881 */ 882 static void ufs_trunc_direct(struct inode *inode) 883 { 884 struct ufs_inode_info *ufsi = UFS_I(inode); 885 struct super_block *sb = inode->i_sb; 886 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 887 unsigned int new_frags, old_frags; 888 unsigned int old_slot, new_slot; 889 unsigned int old_tail, new_tail; 890 struct to_free ctx = {.inode = inode}; 891 892 UFSD("ENTER: ino %lu\n", inode->i_ino); 893 894 new_frags = DIRECT_FRAGMENT; 895 // new_frags = first fragment past the new EOF 896 old_frags = min_t(u64, UFS_NDIR_FRAGMENT, ufsi->i_lastfrag); 897 // old_frags = first fragment past the old EOF or covered by indirects 898 899 if (new_frags >= old_frags) // expanding - nothing to free 900 goto done; 901 902 old_tail = ufs_fragnum(old_frags); 903 old_slot = ufs_fragstoblks(old_frags); 904 new_tail = ufs_fragnum(new_frags); 905 new_slot = ufs_fragstoblks(new_frags); 906 907 if (old_slot == new_slot) { // old_tail > 0 908 void *p = ufs_get_direct_data_ptr(uspi, ufsi, old_slot); 909 u64 tmp = ufs_data_ptr_to_cpu(sb, p); 910 if (!tmp) 911 ufs_panic(sb, __func__, "internal error"); 912 if (!new_tail) { 913 write_seqlock(&ufsi->meta_lock); 914 ufs_data_ptr_clear(uspi, p); 915 write_sequnlock(&ufsi->meta_lock); 916 } 917 ufs_free_fragments(inode, tmp + new_tail, old_tail - new_tail); 918 } else { 919 unsigned int slot = new_slot; 920 921 if (new_tail) { 922 void *p = ufs_get_direct_data_ptr(uspi, ufsi, slot++); 923 u64 tmp = ufs_data_ptr_to_cpu(sb, p); 924 if (!tmp) 925 ufs_panic(sb, __func__, "internal error"); 926 927 ufs_free_fragments(inode, tmp + new_tail, 928 uspi->s_fpb - new_tail); 929 } 930 while (slot < old_slot) { 931 void *p = ufs_get_direct_data_ptr(uspi, ufsi, slot++); 932 u64 tmp = ufs_data_ptr_to_cpu(sb, p); 933 if (!tmp) 934 continue; 935 write_seqlock(&ufsi->meta_lock); 936 ufs_data_ptr_clear(uspi, p); 937 write_sequnlock(&ufsi->meta_lock); 938 939 free_data(&ctx, tmp, uspi->s_fpb); 940 } 941 942 free_data(&ctx, 0, 0); 943 944 if (old_tail) { 945 void *p = ufs_get_direct_data_ptr(uspi, ufsi, slot); 946 u64 tmp = ufs_data_ptr_to_cpu(sb, p); 947 if (!tmp) 948 ufs_panic(sb, __func__, "internal error"); 949 write_seqlock(&ufsi->meta_lock); 950 ufs_data_ptr_clear(uspi, p); 951 write_sequnlock(&ufsi->meta_lock); 952 953 ufs_free_fragments(inode, tmp, old_tail); 954 } 955 } 956 done: 957 UFSD("EXIT: ino %lu\n", inode->i_ino); 958 } 959 960 static void free_full_branch(struct inode *inode, u64 ind_block, int depth) 961 { 962 struct super_block *sb = inode->i_sb; 963 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 964 struct ufs_buffer_head *ubh = ubh_bread(sb, ind_block, uspi->s_bsize); 965 unsigned i; 966 967 if (!ubh) 968 return; 969 970 if (--depth) { 971 for (i = 0; i < uspi->s_apb; i++) { 972 void *p = ubh_get_data_ptr(uspi, ubh, i); 973 u64 block = ufs_data_ptr_to_cpu(sb, p); 974 if (block) 975 free_full_branch(inode, block, depth); 976 } 977 } else { 978 struct to_free ctx = {.inode = inode}; 979 980 for (i = 0; i < uspi->s_apb; i++) { 981 void *p = ubh_get_data_ptr(uspi, ubh, i); 982 u64 block = ufs_data_ptr_to_cpu(sb, p); 983 if (block) 984 free_data(&ctx, block, uspi->s_fpb); 985 } 986 free_data(&ctx, 0, 0); 987 } 988 989 ubh_bforget(ubh); 990 ufs_free_blocks(inode, ind_block, uspi->s_fpb); 991 } 992 993 static void free_branch_tail(struct inode *inode, unsigned from, struct ufs_buffer_head *ubh, int depth) 994 { 995 struct super_block *sb = inode->i_sb; 996 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 997 unsigned i; 998 999 if (--depth) { 1000 for (i = from; i < uspi->s_apb ; i++) { 1001 void *p = ubh_get_data_ptr(uspi, ubh, i); 1002 u64 block = ufs_data_ptr_to_cpu(sb, p); 1003 if (block) { 1004 write_seqlock(&UFS_I(inode)->meta_lock); 1005 ufs_data_ptr_clear(uspi, p); 1006 write_sequnlock(&UFS_I(inode)->meta_lock); 1007 ubh_mark_buffer_dirty(ubh); 1008 free_full_branch(inode, block, depth); 1009 } 1010 } 1011 } else { 1012 struct to_free ctx = {.inode = inode}; 1013 1014 for (i = from; i < uspi->s_apb; i++) { 1015 void *p = ubh_get_data_ptr(uspi, ubh, i); 1016 u64 block = ufs_data_ptr_to_cpu(sb, p); 1017 if (block) { 1018 write_seqlock(&UFS_I(inode)->meta_lock); 1019 ufs_data_ptr_clear(uspi, p); 1020 write_sequnlock(&UFS_I(inode)->meta_lock); 1021 ubh_mark_buffer_dirty(ubh); 1022 free_data(&ctx, block, uspi->s_fpb); 1023 } 1024 } 1025 free_data(&ctx, 0, 0); 1026 } 1027 if (IS_SYNC(inode) && ubh_buffer_dirty(ubh)) 1028 ubh_sync_block(ubh); 1029 ubh_brelse(ubh); 1030 } 1031 1032 static int ufs_alloc_lastblock(struct inode *inode, loff_t size) 1033 { 1034 int err = 0; 1035 struct super_block *sb = inode->i_sb; 1036 struct address_space *mapping = inode->i_mapping; 1037 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 1038 unsigned i, end; 1039 sector_t lastfrag; 1040 struct folio *folio; 1041 struct buffer_head *bh; 1042 u64 phys64; 1043 1044 lastfrag = (size + uspi->s_fsize - 1) >> uspi->s_fshift; 1045 1046 if (!lastfrag) 1047 goto out; 1048 1049 lastfrag--; 1050 1051 folio = ufs_get_locked_folio(mapping, lastfrag >> 1052 (PAGE_SHIFT - inode->i_blkbits)); 1053 if (IS_ERR(folio)) { 1054 err = -EIO; 1055 goto out; 1056 } 1057 1058 end = lastfrag & ((1 << (PAGE_SHIFT - inode->i_blkbits)) - 1); 1059 bh = folio_buffers(folio); 1060 for (i = 0; i < end; ++i) 1061 bh = bh->b_this_page; 1062 1063 err = ufs_getfrag_block(inode, lastfrag, bh, 1); 1064 1065 if (unlikely(err)) 1066 goto out_unlock; 1067 1068 if (buffer_new(bh)) { 1069 clear_buffer_new(bh); 1070 clean_bdev_bh_alias(bh); 1071 /* 1072 * we do not zeroize fragment, because of 1073 * if it maped to hole, it already contains zeroes 1074 */ 1075 set_buffer_uptodate(bh); 1076 mark_buffer_dirty(bh); 1077 folio_mark_dirty(folio); 1078 } 1079 1080 if (lastfrag >= UFS_IND_FRAGMENT) { 1081 end = uspi->s_fpb - ufs_fragnum(lastfrag) - 1; 1082 phys64 = bh->b_blocknr + 1; 1083 for (i = 0; i < end; ++i) { 1084 bh = sb_getblk(sb, i + phys64); 1085 lock_buffer(bh); 1086 memset(bh->b_data, 0, sb->s_blocksize); 1087 set_buffer_uptodate(bh); 1088 mark_buffer_dirty(bh); 1089 unlock_buffer(bh); 1090 sync_dirty_buffer(bh); 1091 brelse(bh); 1092 } 1093 } 1094 out_unlock: 1095 ufs_put_locked_folio(folio); 1096 out: 1097 return err; 1098 } 1099 1100 static void ufs_truncate_blocks(struct inode *inode) 1101 { 1102 struct ufs_inode_info *ufsi = UFS_I(inode); 1103 struct super_block *sb = inode->i_sb; 1104 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 1105 unsigned offsets[4]; 1106 int depth; 1107 int depth2; 1108 unsigned i; 1109 struct ufs_buffer_head *ubh[3]; 1110 void *p; 1111 u64 block; 1112 1113 if (inode->i_size) { 1114 sector_t last = (inode->i_size - 1) >> uspi->s_bshift; 1115 depth = ufs_block_to_path(inode, last, offsets); 1116 if (!depth) 1117 return; 1118 } else { 1119 depth = 1; 1120 } 1121 1122 for (depth2 = depth - 1; depth2; depth2--) 1123 if (offsets[depth2] != uspi->s_apb - 1) 1124 break; 1125 1126 mutex_lock(&ufsi->truncate_mutex); 1127 if (depth == 1) { 1128 ufs_trunc_direct(inode); 1129 offsets[0] = UFS_IND_BLOCK; 1130 } else { 1131 /* get the blocks that should be partially emptied */ 1132 p = ufs_get_direct_data_ptr(uspi, ufsi, offsets[0]++); 1133 for (i = 0; i < depth2; i++) { 1134 block = ufs_data_ptr_to_cpu(sb, p); 1135 if (!block) 1136 break; 1137 ubh[i] = ubh_bread(sb, block, uspi->s_bsize); 1138 if (!ubh[i]) { 1139 write_seqlock(&ufsi->meta_lock); 1140 ufs_data_ptr_clear(uspi, p); 1141 write_sequnlock(&ufsi->meta_lock); 1142 break; 1143 } 1144 p = ubh_get_data_ptr(uspi, ubh[i], offsets[i + 1]++); 1145 } 1146 while (i--) 1147 free_branch_tail(inode, offsets[i + 1], ubh[i], depth - i - 1); 1148 } 1149 for (i = offsets[0]; i <= UFS_TIND_BLOCK; i++) { 1150 p = ufs_get_direct_data_ptr(uspi, ufsi, i); 1151 block = ufs_data_ptr_to_cpu(sb, p); 1152 if (block) { 1153 write_seqlock(&ufsi->meta_lock); 1154 ufs_data_ptr_clear(uspi, p); 1155 write_sequnlock(&ufsi->meta_lock); 1156 free_full_branch(inode, block, i - UFS_IND_BLOCK + 1); 1157 } 1158 } 1159 read_seqlock_excl(&ufsi->meta_lock); 1160 ufsi->i_lastfrag = DIRECT_FRAGMENT; 1161 read_sequnlock_excl(&ufsi->meta_lock); 1162 mark_inode_dirty(inode); 1163 mutex_unlock(&ufsi->truncate_mutex); 1164 } 1165 1166 static int ufs_truncate(struct inode *inode, loff_t size) 1167 { 1168 int err = 0; 1169 1170 UFSD("ENTER: ino %lu, i_size: %llu, old_i_size: %llu\n", 1171 inode->i_ino, (unsigned long long)size, 1172 (unsigned long long)i_size_read(inode)); 1173 1174 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || 1175 S_ISLNK(inode->i_mode))) 1176 return -EINVAL; 1177 if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) 1178 return -EPERM; 1179 1180 err = ufs_alloc_lastblock(inode, size); 1181 1182 if (err) 1183 goto out; 1184 1185 block_truncate_page(inode->i_mapping, size, ufs_getfrag_block); 1186 1187 truncate_setsize(inode, size); 1188 1189 ufs_truncate_blocks(inode); 1190 inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode)); 1191 mark_inode_dirty(inode); 1192 out: 1193 UFSD("EXIT: err %d\n", err); 1194 return err; 1195 } 1196 1197 int ufs_setattr(struct mnt_idmap *idmap, struct dentry *dentry, 1198 struct iattr *attr) 1199 { 1200 struct inode *inode = d_inode(dentry); 1201 unsigned int ia_valid = attr->ia_valid; 1202 int error; 1203 1204 error = setattr_prepare(&nop_mnt_idmap, dentry, attr); 1205 if (error) 1206 return error; 1207 1208 if (ia_valid & ATTR_SIZE && attr->ia_size != inode->i_size) { 1209 error = ufs_truncate(inode, attr->ia_size); 1210 if (error) 1211 return error; 1212 } 1213 1214 setattr_copy(&nop_mnt_idmap, inode, attr); 1215 mark_inode_dirty(inode); 1216 return 0; 1217 } 1218 1219 const struct inode_operations ufs_file_inode_operations = { 1220 .setattr = ufs_setattr, 1221 }; 1222