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(const struct kiocb *iocb, 478 struct address_space *mapping, 479 loff_t pos, unsigned len, 480 struct folio **foliop, void **fsdata) 481 { 482 int ret; 483 484 ret = block_write_begin(mapping, pos, len, foliop, ufs_getfrag_block); 485 if (unlikely(ret)) 486 ufs_write_failed(mapping, pos + len); 487 488 return ret; 489 } 490 491 static int ufs_write_end(const struct kiocb *iocb, 492 struct address_space *mapping, 493 loff_t pos, unsigned len, unsigned copied, 494 struct folio *folio, void *fsdata) 495 { 496 int ret; 497 498 ret = generic_write_end(iocb, mapping, pos, len, copied, folio, fsdata); 499 if (ret < len) 500 ufs_write_failed(mapping, pos + len); 501 return ret; 502 } 503 504 static sector_t ufs_bmap(struct address_space *mapping, sector_t block) 505 { 506 return generic_block_bmap(mapping,block,ufs_getfrag_block); 507 } 508 509 const struct address_space_operations ufs_aops = { 510 .dirty_folio = block_dirty_folio, 511 .invalidate_folio = block_invalidate_folio, 512 .read_folio = ufs_read_folio, 513 .writepages = ufs_writepages, 514 .write_begin = ufs_write_begin, 515 .write_end = ufs_write_end, 516 .migrate_folio = buffer_migrate_folio, 517 .bmap = ufs_bmap 518 }; 519 520 static void ufs_set_inode_ops(struct inode *inode) 521 { 522 if (S_ISREG(inode->i_mode)) { 523 inode->i_op = &ufs_file_inode_operations; 524 inode->i_fop = &ufs_file_operations; 525 inode->i_mapping->a_ops = &ufs_aops; 526 } else if (S_ISDIR(inode->i_mode)) { 527 inode->i_op = &ufs_dir_inode_operations; 528 inode->i_fop = &ufs_dir_operations; 529 inode->i_mapping->a_ops = &ufs_aops; 530 } else if (S_ISLNK(inode->i_mode)) { 531 if (!inode->i_blocks) { 532 inode->i_link = (char *)UFS_I(inode)->i_u1.i_symlink; 533 inode->i_op = &simple_symlink_inode_operations; 534 } else { 535 inode->i_mapping->a_ops = &ufs_aops; 536 inode->i_op = &page_symlink_inode_operations; 537 inode_nohighmem(inode); 538 } 539 } else 540 init_special_inode(inode, inode->i_mode, 541 ufs_get_inode_dev(inode->i_sb, UFS_I(inode))); 542 } 543 544 static int ufs1_read_inode(struct inode *inode, struct ufs_inode *ufs_inode) 545 { 546 struct ufs_inode_info *ufsi = UFS_I(inode); 547 struct super_block *sb = inode->i_sb; 548 umode_t mode; 549 550 /* 551 * Copy data to the in-core inode. 552 */ 553 inode->i_mode = mode = fs16_to_cpu(sb, ufs_inode->ui_mode); 554 set_nlink(inode, fs16_to_cpu(sb, ufs_inode->ui_nlink)); 555 if (inode->i_nlink == 0) 556 return -ESTALE; 557 558 /* 559 * Linux now has 32-bit uid and gid, so we can support EFT. 560 */ 561 i_uid_write(inode, ufs_get_inode_uid(sb, ufs_inode)); 562 i_gid_write(inode, ufs_get_inode_gid(sb, ufs_inode)); 563 564 inode->i_size = fs64_to_cpu(sb, ufs_inode->ui_size); 565 inode_set_atime(inode, 566 (signed)fs32_to_cpu(sb, ufs_inode->ui_atime.tv_sec), 567 0); 568 inode_set_ctime(inode, 569 (signed)fs32_to_cpu(sb, ufs_inode->ui_ctime.tv_sec), 570 0); 571 inode_set_mtime(inode, 572 (signed)fs32_to_cpu(sb, ufs_inode->ui_mtime.tv_sec), 573 0); 574 inode->i_blocks = fs32_to_cpu(sb, ufs_inode->ui_blocks); 575 inode->i_generation = fs32_to_cpu(sb, ufs_inode->ui_gen); 576 ufsi->i_flags = fs32_to_cpu(sb, ufs_inode->ui_flags); 577 ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); 578 ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); 579 580 581 if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { 582 memcpy(ufsi->i_u1.i_data, &ufs_inode->ui_u2.ui_addr, 583 sizeof(ufs_inode->ui_u2.ui_addr)); 584 } else { 585 memcpy(ufsi->i_u1.i_symlink, ufs_inode->ui_u2.ui_symlink, 586 sizeof(ufs_inode->ui_u2.ui_symlink) - 1); 587 ufsi->i_u1.i_symlink[sizeof(ufs_inode->ui_u2.ui_symlink) - 1] = 0; 588 } 589 return 0; 590 } 591 592 static int ufs2_read_inode(struct inode *inode, struct ufs2_inode *ufs2_inode) 593 { 594 struct ufs_inode_info *ufsi = UFS_I(inode); 595 struct super_block *sb = inode->i_sb; 596 umode_t mode; 597 598 UFSD("Reading ufs2 inode, ino %lu\n", inode->i_ino); 599 /* 600 * Copy data to the in-core inode. 601 */ 602 inode->i_mode = mode = fs16_to_cpu(sb, ufs2_inode->ui_mode); 603 set_nlink(inode, fs16_to_cpu(sb, ufs2_inode->ui_nlink)); 604 if (inode->i_nlink == 0) 605 return -ESTALE; 606 607 /* 608 * Linux now has 32-bit uid and gid, so we can support EFT. 609 */ 610 i_uid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_uid)); 611 i_gid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_gid)); 612 613 inode->i_size = fs64_to_cpu(sb, ufs2_inode->ui_size); 614 inode_set_atime(inode, fs64_to_cpu(sb, ufs2_inode->ui_atime), 615 fs32_to_cpu(sb, ufs2_inode->ui_atimensec)); 616 inode_set_ctime(inode, fs64_to_cpu(sb, ufs2_inode->ui_ctime), 617 fs32_to_cpu(sb, ufs2_inode->ui_ctimensec)); 618 inode_set_mtime(inode, fs64_to_cpu(sb, ufs2_inode->ui_mtime), 619 fs32_to_cpu(sb, ufs2_inode->ui_mtimensec)); 620 inode->i_blocks = fs64_to_cpu(sb, ufs2_inode->ui_blocks); 621 inode->i_generation = fs32_to_cpu(sb, ufs2_inode->ui_gen); 622 ufsi->i_flags = fs32_to_cpu(sb, ufs2_inode->ui_flags); 623 /* 624 ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); 625 ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); 626 */ 627 628 if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { 629 memcpy(ufsi->i_u1.u2_i_data, &ufs2_inode->ui_u2.ui_addr, 630 sizeof(ufs2_inode->ui_u2.ui_addr)); 631 } else { 632 memcpy(ufsi->i_u1.i_symlink, ufs2_inode->ui_u2.ui_symlink, 633 sizeof(ufs2_inode->ui_u2.ui_symlink) - 1); 634 ufsi->i_u1.i_symlink[sizeof(ufs2_inode->ui_u2.ui_symlink) - 1] = 0; 635 } 636 return 0; 637 } 638 639 struct inode *ufs_iget(struct super_block *sb, unsigned long ino) 640 { 641 struct ufs_inode_info *ufsi; 642 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 643 struct buffer_head * bh; 644 struct inode *inode; 645 int err = -EIO; 646 647 UFSD("ENTER, ino %lu\n", ino); 648 649 if (ino < UFS_ROOTINO || ino > (uspi->s_ncg * uspi->s_ipg)) { 650 ufs_warning(sb, "ufs_read_inode", "bad inode number (%lu)\n", 651 ino); 652 return ERR_PTR(-EIO); 653 } 654 655 inode = iget_locked(sb, ino); 656 if (!inode) 657 return ERR_PTR(-ENOMEM); 658 if (!(inode->i_state & I_NEW)) 659 return inode; 660 661 ufsi = UFS_I(inode); 662 663 bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino)); 664 if (!bh) { 665 ufs_warning(sb, "ufs_read_inode", "unable to read inode %lu\n", 666 inode->i_ino); 667 goto bad_inode; 668 } 669 if ((UFS_SB(sb)->s_flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { 670 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data; 671 672 err = ufs2_read_inode(inode, 673 ufs2_inode + ufs_inotofsbo(inode->i_ino)); 674 } else { 675 struct ufs_inode *ufs_inode = (struct ufs_inode *)bh->b_data; 676 677 err = ufs1_read_inode(inode, 678 ufs_inode + ufs_inotofsbo(inode->i_ino)); 679 } 680 brelse(bh); 681 if (err) 682 goto bad_inode; 683 684 inode_inc_iversion(inode); 685 ufsi->i_lastfrag = 686 (inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift; 687 ufsi->i_dir_start_lookup = 0; 688 ufsi->i_osync = 0; 689 690 ufs_set_inode_ops(inode); 691 692 UFSD("EXIT\n"); 693 unlock_new_inode(inode); 694 return inode; 695 696 bad_inode: 697 iget_failed(inode); 698 return ERR_PTR(err); 699 } 700 701 static void ufs1_update_inode(struct inode *inode, struct ufs_inode *ufs_inode) 702 { 703 struct super_block *sb = inode->i_sb; 704 struct ufs_inode_info *ufsi = UFS_I(inode); 705 706 ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode); 707 ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink); 708 709 ufs_set_inode_uid(sb, ufs_inode, i_uid_read(inode)); 710 ufs_set_inode_gid(sb, ufs_inode, i_gid_read(inode)); 711 712 ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size); 713 ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb, 714 inode_get_atime_sec(inode)); 715 ufs_inode->ui_atime.tv_usec = 0; 716 ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb, 717 inode_get_ctime_sec(inode)); 718 ufs_inode->ui_ctime.tv_usec = 0; 719 ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb, 720 inode_get_mtime_sec(inode)); 721 ufs_inode->ui_mtime.tv_usec = 0; 722 ufs_inode->ui_blocks = cpu_to_fs32(sb, inode->i_blocks); 723 ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags); 724 ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation); 725 726 if ((UFS_SB(sb)->s_flags & UFS_UID_MASK) == UFS_UID_EFT) { 727 ufs_inode->ui_u3.ui_sun.ui_shadow = cpu_to_fs32(sb, ufsi->i_shadow); 728 ufs_inode->ui_u3.ui_sun.ui_oeftflag = cpu_to_fs32(sb, ufsi->i_oeftflag); 729 } 730 731 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { 732 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */ 733 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.i_data[0]; 734 } else if (inode->i_blocks) { 735 memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.i_data, 736 sizeof(ufs_inode->ui_u2.ui_addr)); 737 } 738 else { 739 memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink, 740 sizeof(ufs_inode->ui_u2.ui_symlink)); 741 } 742 743 if (!inode->i_nlink) 744 memset (ufs_inode, 0, sizeof(struct ufs_inode)); 745 } 746 747 static void ufs2_update_inode(struct inode *inode, struct ufs2_inode *ufs_inode) 748 { 749 struct super_block *sb = inode->i_sb; 750 struct ufs_inode_info *ufsi = UFS_I(inode); 751 752 UFSD("ENTER\n"); 753 ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode); 754 ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink); 755 756 ufs_inode->ui_uid = cpu_to_fs32(sb, i_uid_read(inode)); 757 ufs_inode->ui_gid = cpu_to_fs32(sb, i_gid_read(inode)); 758 759 ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size); 760 ufs_inode->ui_atime = cpu_to_fs64(sb, inode_get_atime_sec(inode)); 761 ufs_inode->ui_atimensec = cpu_to_fs32(sb, 762 inode_get_atime_nsec(inode)); 763 ufs_inode->ui_ctime = cpu_to_fs64(sb, inode_get_ctime_sec(inode)); 764 ufs_inode->ui_ctimensec = cpu_to_fs32(sb, 765 inode_get_ctime_nsec(inode)); 766 ufs_inode->ui_mtime = cpu_to_fs64(sb, inode_get_mtime_sec(inode)); 767 ufs_inode->ui_mtimensec = cpu_to_fs32(sb, 768 inode_get_mtime_nsec(inode)); 769 770 ufs_inode->ui_blocks = cpu_to_fs64(sb, inode->i_blocks); 771 ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags); 772 ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation); 773 774 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { 775 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */ 776 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.u2_i_data[0]; 777 } else if (inode->i_blocks) { 778 memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.u2_i_data, 779 sizeof(ufs_inode->ui_u2.ui_addr)); 780 } else { 781 memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink, 782 sizeof(ufs_inode->ui_u2.ui_symlink)); 783 } 784 785 if (!inode->i_nlink) 786 memset (ufs_inode, 0, sizeof(struct ufs2_inode)); 787 UFSD("EXIT\n"); 788 } 789 790 static int ufs_update_inode(struct inode * inode, int do_sync) 791 { 792 struct super_block *sb = inode->i_sb; 793 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 794 struct buffer_head * bh; 795 796 UFSD("ENTER, ino %lu\n", inode->i_ino); 797 798 if (inode->i_ino < UFS_ROOTINO || 799 inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) { 800 ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino); 801 return -1; 802 } 803 804 bh = sb_bread(sb, ufs_inotofsba(inode->i_ino)); 805 if (!bh) { 806 ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino); 807 return -1; 808 } 809 if (uspi->fs_magic == UFS2_MAGIC) { 810 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data; 811 812 ufs2_update_inode(inode, 813 ufs2_inode + ufs_inotofsbo(inode->i_ino)); 814 } else { 815 struct ufs_inode *ufs_inode = (struct ufs_inode *) bh->b_data; 816 817 ufs1_update_inode(inode, ufs_inode + ufs_inotofsbo(inode->i_ino)); 818 } 819 820 mark_buffer_dirty(bh); 821 if (do_sync) 822 sync_dirty_buffer(bh); 823 brelse (bh); 824 825 UFSD("EXIT\n"); 826 return 0; 827 } 828 829 int ufs_write_inode(struct inode *inode, struct writeback_control *wbc) 830 { 831 return ufs_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL); 832 } 833 834 int ufs_sync_inode (struct inode *inode) 835 { 836 return ufs_update_inode (inode, 1); 837 } 838 839 void ufs_evict_inode(struct inode * inode) 840 { 841 int want_delete = 0; 842 843 if (!inode->i_nlink && !is_bad_inode(inode)) 844 want_delete = 1; 845 846 truncate_inode_pages_final(&inode->i_data); 847 if (want_delete) { 848 inode->i_size = 0; 849 if (inode->i_blocks && 850 (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || 851 S_ISLNK(inode->i_mode))) 852 ufs_truncate_blocks(inode); 853 ufs_update_inode(inode, inode_needs_sync(inode)); 854 } 855 856 invalidate_inode_buffers(inode); 857 clear_inode(inode); 858 859 if (want_delete) 860 ufs_free_inode(inode); 861 } 862 863 struct to_free { 864 struct inode *inode; 865 u64 to; 866 unsigned count; 867 }; 868 869 static inline void free_data(struct to_free *ctx, u64 from, unsigned count) 870 { 871 if (ctx->count && ctx->to != from) { 872 ufs_free_blocks(ctx->inode, ctx->to - ctx->count, ctx->count); 873 ctx->count = 0; 874 } 875 ctx->count += count; 876 ctx->to = from + count; 877 } 878 879 #define DIRECT_FRAGMENT ((inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift) 880 881 /* 882 * used only for truncation down to direct blocks. 883 */ 884 static void ufs_trunc_direct(struct inode *inode) 885 { 886 struct ufs_inode_info *ufsi = UFS_I(inode); 887 struct super_block *sb = inode->i_sb; 888 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 889 unsigned int new_frags, old_frags; 890 unsigned int old_slot, new_slot; 891 unsigned int old_tail, new_tail; 892 struct to_free ctx = {.inode = inode}; 893 894 UFSD("ENTER: ino %lu\n", inode->i_ino); 895 896 new_frags = DIRECT_FRAGMENT; 897 // new_frags = first fragment past the new EOF 898 old_frags = min_t(u64, UFS_NDIR_FRAGMENT, ufsi->i_lastfrag); 899 // old_frags = first fragment past the old EOF or covered by indirects 900 901 if (new_frags >= old_frags) // expanding - nothing to free 902 goto done; 903 904 old_tail = ufs_fragnum(old_frags); 905 old_slot = ufs_fragstoblks(old_frags); 906 new_tail = ufs_fragnum(new_frags); 907 new_slot = ufs_fragstoblks(new_frags); 908 909 if (old_slot == new_slot) { // old_tail > 0 910 void *p = ufs_get_direct_data_ptr(uspi, ufsi, old_slot); 911 u64 tmp = ufs_data_ptr_to_cpu(sb, p); 912 if (!tmp) 913 ufs_panic(sb, __func__, "internal error"); 914 if (!new_tail) { 915 write_seqlock(&ufsi->meta_lock); 916 ufs_data_ptr_clear(uspi, p); 917 write_sequnlock(&ufsi->meta_lock); 918 } 919 ufs_free_fragments(inode, tmp + new_tail, old_tail - new_tail); 920 } else { 921 unsigned int slot = new_slot; 922 923 if (new_tail) { 924 void *p = ufs_get_direct_data_ptr(uspi, ufsi, slot++); 925 u64 tmp = ufs_data_ptr_to_cpu(sb, p); 926 if (!tmp) 927 ufs_panic(sb, __func__, "internal error"); 928 929 ufs_free_fragments(inode, tmp + new_tail, 930 uspi->s_fpb - new_tail); 931 } 932 while (slot < old_slot) { 933 void *p = ufs_get_direct_data_ptr(uspi, ufsi, slot++); 934 u64 tmp = ufs_data_ptr_to_cpu(sb, p); 935 if (!tmp) 936 continue; 937 write_seqlock(&ufsi->meta_lock); 938 ufs_data_ptr_clear(uspi, p); 939 write_sequnlock(&ufsi->meta_lock); 940 941 free_data(&ctx, tmp, uspi->s_fpb); 942 } 943 944 free_data(&ctx, 0, 0); 945 946 if (old_tail) { 947 void *p = ufs_get_direct_data_ptr(uspi, ufsi, slot); 948 u64 tmp = ufs_data_ptr_to_cpu(sb, p); 949 if (!tmp) 950 ufs_panic(sb, __func__, "internal error"); 951 write_seqlock(&ufsi->meta_lock); 952 ufs_data_ptr_clear(uspi, p); 953 write_sequnlock(&ufsi->meta_lock); 954 955 ufs_free_fragments(inode, tmp, old_tail); 956 } 957 } 958 done: 959 UFSD("EXIT: ino %lu\n", inode->i_ino); 960 } 961 962 static void free_full_branch(struct inode *inode, u64 ind_block, int depth) 963 { 964 struct super_block *sb = inode->i_sb; 965 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 966 struct ufs_buffer_head *ubh = ubh_bread(sb, ind_block, uspi->s_bsize); 967 unsigned i; 968 969 if (!ubh) 970 return; 971 972 if (--depth) { 973 for (i = 0; i < uspi->s_apb; i++) { 974 void *p = ubh_get_data_ptr(uspi, ubh, i); 975 u64 block = ufs_data_ptr_to_cpu(sb, p); 976 if (block) 977 free_full_branch(inode, block, depth); 978 } 979 } else { 980 struct to_free ctx = {.inode = inode}; 981 982 for (i = 0; i < uspi->s_apb; i++) { 983 void *p = ubh_get_data_ptr(uspi, ubh, i); 984 u64 block = ufs_data_ptr_to_cpu(sb, p); 985 if (block) 986 free_data(&ctx, block, uspi->s_fpb); 987 } 988 free_data(&ctx, 0, 0); 989 } 990 991 ubh_bforget(ubh); 992 ufs_free_blocks(inode, ind_block, uspi->s_fpb); 993 } 994 995 static void free_branch_tail(struct inode *inode, unsigned from, struct ufs_buffer_head *ubh, int depth) 996 { 997 struct super_block *sb = inode->i_sb; 998 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 999 unsigned i; 1000 1001 if (--depth) { 1002 for (i = from; i < uspi->s_apb ; i++) { 1003 void *p = ubh_get_data_ptr(uspi, ubh, i); 1004 u64 block = ufs_data_ptr_to_cpu(sb, p); 1005 if (block) { 1006 write_seqlock(&UFS_I(inode)->meta_lock); 1007 ufs_data_ptr_clear(uspi, p); 1008 write_sequnlock(&UFS_I(inode)->meta_lock); 1009 ubh_mark_buffer_dirty(ubh); 1010 free_full_branch(inode, block, depth); 1011 } 1012 } 1013 } else { 1014 struct to_free ctx = {.inode = inode}; 1015 1016 for (i = from; i < uspi->s_apb; i++) { 1017 void *p = ubh_get_data_ptr(uspi, ubh, i); 1018 u64 block = ufs_data_ptr_to_cpu(sb, p); 1019 if (block) { 1020 write_seqlock(&UFS_I(inode)->meta_lock); 1021 ufs_data_ptr_clear(uspi, p); 1022 write_sequnlock(&UFS_I(inode)->meta_lock); 1023 ubh_mark_buffer_dirty(ubh); 1024 free_data(&ctx, block, uspi->s_fpb); 1025 } 1026 } 1027 free_data(&ctx, 0, 0); 1028 } 1029 if (IS_SYNC(inode) && ubh_buffer_dirty(ubh)) 1030 ubh_sync_block(ubh); 1031 ubh_brelse(ubh); 1032 } 1033 1034 static int ufs_alloc_lastblock(struct inode *inode, loff_t size) 1035 { 1036 int err = 0; 1037 struct super_block *sb = inode->i_sb; 1038 struct address_space *mapping = inode->i_mapping; 1039 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 1040 unsigned i, end; 1041 sector_t lastfrag; 1042 struct folio *folio; 1043 struct buffer_head *bh; 1044 u64 phys64; 1045 1046 lastfrag = (size + uspi->s_fsize - 1) >> uspi->s_fshift; 1047 1048 if (!lastfrag) 1049 goto out; 1050 1051 lastfrag--; 1052 1053 folio = ufs_get_locked_folio(mapping, lastfrag >> 1054 (PAGE_SHIFT - inode->i_blkbits)); 1055 if (IS_ERR(folio)) { 1056 err = -EIO; 1057 goto out; 1058 } 1059 1060 end = lastfrag & ((1 << (PAGE_SHIFT - inode->i_blkbits)) - 1); 1061 bh = folio_buffers(folio); 1062 for (i = 0; i < end; ++i) 1063 bh = bh->b_this_page; 1064 1065 err = ufs_getfrag_block(inode, lastfrag, bh, 1); 1066 1067 if (unlikely(err)) 1068 goto out_unlock; 1069 1070 if (buffer_new(bh)) { 1071 clear_buffer_new(bh); 1072 clean_bdev_bh_alias(bh); 1073 /* 1074 * we do not zeroize fragment, because of 1075 * if it maped to hole, it already contains zeroes 1076 */ 1077 set_buffer_uptodate(bh); 1078 mark_buffer_dirty(bh); 1079 folio_mark_dirty(folio); 1080 } 1081 1082 if (lastfrag >= UFS_IND_FRAGMENT) { 1083 end = uspi->s_fpb - ufs_fragnum(lastfrag) - 1; 1084 phys64 = bh->b_blocknr + 1; 1085 for (i = 0; i < end; ++i) { 1086 bh = sb_getblk(sb, i + phys64); 1087 lock_buffer(bh); 1088 memset(bh->b_data, 0, sb->s_blocksize); 1089 set_buffer_uptodate(bh); 1090 mark_buffer_dirty(bh); 1091 unlock_buffer(bh); 1092 sync_dirty_buffer(bh); 1093 brelse(bh); 1094 } 1095 } 1096 out_unlock: 1097 ufs_put_locked_folio(folio); 1098 out: 1099 return err; 1100 } 1101 1102 static void ufs_truncate_blocks(struct inode *inode) 1103 { 1104 struct ufs_inode_info *ufsi = UFS_I(inode); 1105 struct super_block *sb = inode->i_sb; 1106 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 1107 unsigned offsets[4]; 1108 int depth; 1109 int depth2; 1110 unsigned i; 1111 struct ufs_buffer_head *ubh[3]; 1112 void *p; 1113 u64 block; 1114 1115 if (inode->i_size) { 1116 sector_t last = (inode->i_size - 1) >> uspi->s_bshift; 1117 depth = ufs_block_to_path(inode, last, offsets); 1118 if (!depth) 1119 return; 1120 } else { 1121 depth = 1; 1122 } 1123 1124 for (depth2 = depth - 1; depth2; depth2--) 1125 if (offsets[depth2] != uspi->s_apb - 1) 1126 break; 1127 1128 mutex_lock(&ufsi->truncate_mutex); 1129 if (depth == 1) { 1130 ufs_trunc_direct(inode); 1131 offsets[0] = UFS_IND_BLOCK; 1132 } else { 1133 /* get the blocks that should be partially emptied */ 1134 p = ufs_get_direct_data_ptr(uspi, ufsi, offsets[0]++); 1135 for (i = 0; i < depth2; i++) { 1136 block = ufs_data_ptr_to_cpu(sb, p); 1137 if (!block) 1138 break; 1139 ubh[i] = ubh_bread(sb, block, uspi->s_bsize); 1140 if (!ubh[i]) { 1141 write_seqlock(&ufsi->meta_lock); 1142 ufs_data_ptr_clear(uspi, p); 1143 write_sequnlock(&ufsi->meta_lock); 1144 break; 1145 } 1146 p = ubh_get_data_ptr(uspi, ubh[i], offsets[i + 1]++); 1147 } 1148 while (i--) 1149 free_branch_tail(inode, offsets[i + 1], ubh[i], depth - i - 1); 1150 } 1151 for (i = offsets[0]; i <= UFS_TIND_BLOCK; i++) { 1152 p = ufs_get_direct_data_ptr(uspi, ufsi, i); 1153 block = ufs_data_ptr_to_cpu(sb, p); 1154 if (block) { 1155 write_seqlock(&ufsi->meta_lock); 1156 ufs_data_ptr_clear(uspi, p); 1157 write_sequnlock(&ufsi->meta_lock); 1158 free_full_branch(inode, block, i - UFS_IND_BLOCK + 1); 1159 } 1160 } 1161 read_seqlock_excl(&ufsi->meta_lock); 1162 ufsi->i_lastfrag = DIRECT_FRAGMENT; 1163 read_sequnlock_excl(&ufsi->meta_lock); 1164 mark_inode_dirty(inode); 1165 mutex_unlock(&ufsi->truncate_mutex); 1166 } 1167 1168 static int ufs_truncate(struct inode *inode, loff_t size) 1169 { 1170 int err = 0; 1171 1172 UFSD("ENTER: ino %lu, i_size: %llu, old_i_size: %llu\n", 1173 inode->i_ino, (unsigned long long)size, 1174 (unsigned long long)i_size_read(inode)); 1175 1176 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || 1177 S_ISLNK(inode->i_mode))) 1178 return -EINVAL; 1179 if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) 1180 return -EPERM; 1181 1182 err = ufs_alloc_lastblock(inode, size); 1183 1184 if (err) 1185 goto out; 1186 1187 block_truncate_page(inode->i_mapping, size, ufs_getfrag_block); 1188 1189 truncate_setsize(inode, size); 1190 1191 ufs_truncate_blocks(inode); 1192 inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode)); 1193 mark_inode_dirty(inode); 1194 out: 1195 UFSD("EXIT: err %d\n", err); 1196 return err; 1197 } 1198 1199 int ufs_setattr(struct mnt_idmap *idmap, struct dentry *dentry, 1200 struct iattr *attr) 1201 { 1202 struct inode *inode = d_inode(dentry); 1203 unsigned int ia_valid = attr->ia_valid; 1204 int error; 1205 1206 error = setattr_prepare(&nop_mnt_idmap, dentry, attr); 1207 if (error) 1208 return error; 1209 1210 if (ia_valid & ATTR_SIZE && attr->ia_size != inode->i_size) { 1211 error = ufs_truncate(inode, attr->ia_size); 1212 if (error) 1213 return error; 1214 } 1215 1216 setattr_copy(&nop_mnt_idmap, inode, attr); 1217 mark_inode_dirty(inode); 1218 return 0; 1219 } 1220 1221 const struct inode_operations ufs_file_inode_operations = { 1222 .setattr = ufs_setattr, 1223 }; 1224