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 page *locked_page) 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_page); 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_page: for ufs_new_fragments() 254 */ 255 static u64 256 ufs_inode_getfrag(struct inode *inode, unsigned index, 257 sector_t new_fragment, int *err, 258 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 u64 tmp, goal, lastfrag; 264 unsigned nfrags = uspi->s_fpb; 265 void *p; 266 267 /* TODO : to be done for write support 268 if ( (flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) 269 goto ufs2; 270 */ 271 272 p = ufs_get_direct_data_ptr(uspi, ufsi, index); 273 tmp = ufs_data_ptr_to_cpu(sb, p); 274 if (tmp) 275 goto out; 276 277 lastfrag = ufsi->i_lastfrag; 278 279 /* will that be a new tail? */ 280 if (new_fragment < UFS_NDIR_FRAGMENT && new_fragment >= lastfrag) 281 nfrags = (new_fragment & uspi->s_fpbmask) + 1; 282 283 goal = 0; 284 if (index) { 285 goal = ufs_data_ptr_to_cpu(sb, 286 ufs_get_direct_data_ptr(uspi, ufsi, index - 1)); 287 if (goal) 288 goal += uspi->s_fpb; 289 } 290 tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), 291 goal, nfrags, err, locked_page); 292 293 if (!tmp) { 294 *err = -ENOSPC; 295 return 0; 296 } 297 298 if (new) 299 *new = 1; 300 inode_set_ctime_current(inode); 301 if (IS_SYNC(inode)) 302 ufs_sync_inode (inode); 303 mark_inode_dirty(inode); 304 out: 305 return tmp + uspi->s_sbbase; 306 307 /* This part : To be implemented .... 308 Required only for writing, not required for READ-ONLY. 309 ufs2: 310 311 u2_block = ufs_fragstoblks(fragment); 312 u2_blockoff = ufs_fragnum(fragment); 313 p = ufsi->i_u1.u2_i_data + block; 314 goal = 0; 315 316 repeat2: 317 tmp = fs32_to_cpu(sb, *p); 318 lastfrag = ufsi->i_lastfrag; 319 320 */ 321 } 322 323 /** 324 * ufs_inode_getblock() - allocate new block 325 * @inode: pointer to inode 326 * @ind_block: block number of the indirect block 327 * @index: number of pointer within the indirect block 328 * @new_fragment: number of new allocated fragment 329 * (block will hold this fragment and also uspi->s_fpb-1) 330 * @err: see ufs_inode_getfrag() 331 * @new: see ufs_inode_getfrag() 332 * @locked_page: see ufs_inode_getfrag() 333 */ 334 static u64 335 ufs_inode_getblock(struct inode *inode, u64 ind_block, 336 unsigned index, sector_t new_fragment, int *err, 337 int *new, struct page *locked_page) 338 { 339 struct super_block *sb = inode->i_sb; 340 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 341 int shift = uspi->s_apbshift - uspi->s_fpbshift; 342 u64 tmp = 0, goal; 343 struct buffer_head *bh; 344 void *p; 345 346 if (!ind_block) 347 return 0; 348 349 bh = sb_bread(sb, ind_block + (index >> shift)); 350 if (unlikely(!bh)) { 351 *err = -EIO; 352 return 0; 353 } 354 355 index &= uspi->s_apbmask >> uspi->s_fpbshift; 356 if (uspi->fs_magic == UFS2_MAGIC) 357 p = (__fs64 *)bh->b_data + index; 358 else 359 p = (__fs32 *)bh->b_data + index; 360 361 tmp = ufs_data_ptr_to_cpu(sb, p); 362 if (tmp) 363 goto out; 364 365 if (index && (uspi->fs_magic == UFS2_MAGIC ? 366 (tmp = fs64_to_cpu(sb, ((__fs64 *)bh->b_data)[index-1])) : 367 (tmp = fs32_to_cpu(sb, ((__fs32 *)bh->b_data)[index-1])))) 368 goal = tmp + uspi->s_fpb; 369 else 370 goal = bh->b_blocknr + uspi->s_fpb; 371 tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), goal, 372 uspi->s_fpb, err, locked_page); 373 if (!tmp) 374 goto out; 375 376 if (new) 377 *new = 1; 378 379 mark_buffer_dirty(bh); 380 if (IS_SYNC(inode)) 381 sync_dirty_buffer(bh); 382 inode_set_ctime_current(inode); 383 mark_inode_dirty(inode); 384 out: 385 brelse (bh); 386 UFSD("EXIT\n"); 387 if (tmp) 388 tmp += uspi->s_sbbase; 389 return tmp; 390 } 391 392 /** 393 * ufs_getfrag_block() - `get_block_t' function, interface between UFS and 394 * read_folio, writepages and so on 395 */ 396 397 static int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create) 398 { 399 struct super_block *sb = inode->i_sb; 400 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 401 int err = 0, new = 0; 402 unsigned offsets[4]; 403 int depth = ufs_block_to_path(inode, fragment >> uspi->s_fpbshift, offsets); 404 u64 phys64 = 0; 405 unsigned frag = fragment & uspi->s_fpbmask; 406 407 phys64 = ufs_frag_map(inode, offsets, depth); 408 if (!create) 409 goto done; 410 411 if (phys64) { 412 if (fragment >= UFS_NDIR_FRAGMENT) 413 goto done; 414 read_seqlock_excl(&UFS_I(inode)->meta_lock); 415 if (fragment < UFS_I(inode)->i_lastfrag) { 416 read_sequnlock_excl(&UFS_I(inode)->meta_lock); 417 goto done; 418 } 419 read_sequnlock_excl(&UFS_I(inode)->meta_lock); 420 } 421 /* This code entered only while writing ....? */ 422 423 mutex_lock(&UFS_I(inode)->truncate_mutex); 424 425 UFSD("ENTER, ino %lu, fragment %llu\n", inode->i_ino, (unsigned long long)fragment); 426 if (unlikely(!depth)) { 427 ufs_warning(sb, "ufs_get_block", "block > big"); 428 err = -EIO; 429 goto out; 430 } 431 432 if (UFS_I(inode)->i_lastfrag < UFS_NDIR_FRAGMENT) { 433 unsigned lastfrag = UFS_I(inode)->i_lastfrag; 434 unsigned tailfrags = lastfrag & uspi->s_fpbmask; 435 if (tailfrags && fragment >= lastfrag) { 436 if (!ufs_extend_tail(inode, fragment, 437 &err, bh_result->b_page)) 438 goto out; 439 } 440 } 441 442 if (depth == 1) { 443 phys64 = ufs_inode_getfrag(inode, offsets[0], fragment, 444 &err, &new, bh_result->b_page); 445 } else { 446 int i; 447 phys64 = ufs_inode_getfrag(inode, offsets[0], fragment, 448 &err, NULL, NULL); 449 for (i = 1; i < depth - 1; i++) 450 phys64 = ufs_inode_getblock(inode, phys64, offsets[i], 451 fragment, &err, NULL, NULL); 452 phys64 = ufs_inode_getblock(inode, phys64, offsets[depth - 1], 453 fragment, &err, &new, bh_result->b_page); 454 } 455 out: 456 if (phys64) { 457 phys64 += frag; 458 map_bh(bh_result, sb, phys64); 459 if (new) 460 set_buffer_new(bh_result); 461 } 462 mutex_unlock(&UFS_I(inode)->truncate_mutex); 463 return err; 464 465 done: 466 if (phys64) 467 map_bh(bh_result, sb, phys64 + frag); 468 return 0; 469 } 470 471 static int ufs_writepages(struct address_space *mapping, 472 struct writeback_control *wbc) 473 { 474 return mpage_writepages(mapping, wbc, ufs_getfrag_block); 475 } 476 477 static int ufs_read_folio(struct file *file, struct folio *folio) 478 { 479 return block_read_full_folio(folio, ufs_getfrag_block); 480 } 481 482 int ufs_prepare_chunk(struct page *page, loff_t pos, unsigned len) 483 { 484 return __block_write_begin(page, pos, len, ufs_getfrag_block); 485 } 486 487 static void ufs_truncate_blocks(struct inode *); 488 489 static void ufs_write_failed(struct address_space *mapping, loff_t to) 490 { 491 struct inode *inode = mapping->host; 492 493 if (to > inode->i_size) { 494 truncate_pagecache(inode, inode->i_size); 495 ufs_truncate_blocks(inode); 496 } 497 } 498 499 static int ufs_write_begin(struct file *file, struct address_space *mapping, 500 loff_t pos, unsigned len, 501 struct page **pagep, void **fsdata) 502 { 503 int ret; 504 505 ret = block_write_begin(mapping, pos, len, pagep, ufs_getfrag_block); 506 if (unlikely(ret)) 507 ufs_write_failed(mapping, pos + len); 508 509 return ret; 510 } 511 512 static int ufs_write_end(struct file *file, struct address_space *mapping, 513 loff_t pos, unsigned len, unsigned copied, 514 struct page *page, void *fsdata) 515 { 516 int ret; 517 518 ret = generic_write_end(file, mapping, pos, len, copied, page, fsdata); 519 if (ret < len) 520 ufs_write_failed(mapping, pos + len); 521 return ret; 522 } 523 524 static sector_t ufs_bmap(struct address_space *mapping, sector_t block) 525 { 526 return generic_block_bmap(mapping,block,ufs_getfrag_block); 527 } 528 529 const struct address_space_operations ufs_aops = { 530 .dirty_folio = block_dirty_folio, 531 .invalidate_folio = block_invalidate_folio, 532 .read_folio = ufs_read_folio, 533 .writepages = ufs_writepages, 534 .write_begin = ufs_write_begin, 535 .write_end = ufs_write_end, 536 .migrate_folio = buffer_migrate_folio, 537 .bmap = ufs_bmap 538 }; 539 540 static void ufs_set_inode_ops(struct inode *inode) 541 { 542 if (S_ISREG(inode->i_mode)) { 543 inode->i_op = &ufs_file_inode_operations; 544 inode->i_fop = &ufs_file_operations; 545 inode->i_mapping->a_ops = &ufs_aops; 546 } else if (S_ISDIR(inode->i_mode)) { 547 inode->i_op = &ufs_dir_inode_operations; 548 inode->i_fop = &ufs_dir_operations; 549 inode->i_mapping->a_ops = &ufs_aops; 550 } else if (S_ISLNK(inode->i_mode)) { 551 if (!inode->i_blocks) { 552 inode->i_link = (char *)UFS_I(inode)->i_u1.i_symlink; 553 inode->i_op = &simple_symlink_inode_operations; 554 } else { 555 inode->i_mapping->a_ops = &ufs_aops; 556 inode->i_op = &page_symlink_inode_operations; 557 inode_nohighmem(inode); 558 } 559 } else 560 init_special_inode(inode, inode->i_mode, 561 ufs_get_inode_dev(inode->i_sb, UFS_I(inode))); 562 } 563 564 static int ufs1_read_inode(struct inode *inode, struct ufs_inode *ufs_inode) 565 { 566 struct ufs_inode_info *ufsi = UFS_I(inode); 567 struct super_block *sb = inode->i_sb; 568 umode_t mode; 569 570 /* 571 * Copy data to the in-core inode. 572 */ 573 inode->i_mode = mode = fs16_to_cpu(sb, ufs_inode->ui_mode); 574 set_nlink(inode, fs16_to_cpu(sb, ufs_inode->ui_nlink)); 575 if (inode->i_nlink == 0) 576 return -ESTALE; 577 578 /* 579 * Linux now has 32-bit uid and gid, so we can support EFT. 580 */ 581 i_uid_write(inode, ufs_get_inode_uid(sb, ufs_inode)); 582 i_gid_write(inode, ufs_get_inode_gid(sb, ufs_inode)); 583 584 inode->i_size = fs64_to_cpu(sb, ufs_inode->ui_size); 585 inode_set_atime(inode, 586 (signed)fs32_to_cpu(sb, ufs_inode->ui_atime.tv_sec), 587 0); 588 inode_set_ctime(inode, 589 (signed)fs32_to_cpu(sb, ufs_inode->ui_ctime.tv_sec), 590 0); 591 inode_set_mtime(inode, 592 (signed)fs32_to_cpu(sb, ufs_inode->ui_mtime.tv_sec), 593 0); 594 inode->i_blocks = fs32_to_cpu(sb, ufs_inode->ui_blocks); 595 inode->i_generation = fs32_to_cpu(sb, ufs_inode->ui_gen); 596 ufsi->i_flags = fs32_to_cpu(sb, ufs_inode->ui_flags); 597 ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); 598 ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); 599 600 601 if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { 602 memcpy(ufsi->i_u1.i_data, &ufs_inode->ui_u2.ui_addr, 603 sizeof(ufs_inode->ui_u2.ui_addr)); 604 } else { 605 memcpy(ufsi->i_u1.i_symlink, ufs_inode->ui_u2.ui_symlink, 606 sizeof(ufs_inode->ui_u2.ui_symlink) - 1); 607 ufsi->i_u1.i_symlink[sizeof(ufs_inode->ui_u2.ui_symlink) - 1] = 0; 608 } 609 return 0; 610 } 611 612 static int ufs2_read_inode(struct inode *inode, struct ufs2_inode *ufs2_inode) 613 { 614 struct ufs_inode_info *ufsi = UFS_I(inode); 615 struct super_block *sb = inode->i_sb; 616 umode_t mode; 617 618 UFSD("Reading ufs2 inode, ino %lu\n", inode->i_ino); 619 /* 620 * Copy data to the in-core inode. 621 */ 622 inode->i_mode = mode = fs16_to_cpu(sb, ufs2_inode->ui_mode); 623 set_nlink(inode, fs16_to_cpu(sb, ufs2_inode->ui_nlink)); 624 if (inode->i_nlink == 0) 625 return -ESTALE; 626 627 /* 628 * Linux now has 32-bit uid and gid, so we can support EFT. 629 */ 630 i_uid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_uid)); 631 i_gid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_gid)); 632 633 inode->i_size = fs64_to_cpu(sb, ufs2_inode->ui_size); 634 inode_set_atime(inode, fs64_to_cpu(sb, ufs2_inode->ui_atime), 635 fs32_to_cpu(sb, ufs2_inode->ui_atimensec)); 636 inode_set_ctime(inode, fs64_to_cpu(sb, ufs2_inode->ui_ctime), 637 fs32_to_cpu(sb, ufs2_inode->ui_ctimensec)); 638 inode_set_mtime(inode, fs64_to_cpu(sb, ufs2_inode->ui_mtime), 639 fs32_to_cpu(sb, ufs2_inode->ui_mtimensec)); 640 inode->i_blocks = fs64_to_cpu(sb, ufs2_inode->ui_blocks); 641 inode->i_generation = fs32_to_cpu(sb, ufs2_inode->ui_gen); 642 ufsi->i_flags = fs32_to_cpu(sb, ufs2_inode->ui_flags); 643 /* 644 ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); 645 ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); 646 */ 647 648 if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { 649 memcpy(ufsi->i_u1.u2_i_data, &ufs2_inode->ui_u2.ui_addr, 650 sizeof(ufs2_inode->ui_u2.ui_addr)); 651 } else { 652 memcpy(ufsi->i_u1.i_symlink, ufs2_inode->ui_u2.ui_symlink, 653 sizeof(ufs2_inode->ui_u2.ui_symlink) - 1); 654 ufsi->i_u1.i_symlink[sizeof(ufs2_inode->ui_u2.ui_symlink) - 1] = 0; 655 } 656 return 0; 657 } 658 659 struct inode *ufs_iget(struct super_block *sb, unsigned long ino) 660 { 661 struct ufs_inode_info *ufsi; 662 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 663 struct buffer_head * bh; 664 struct inode *inode; 665 int err = -EIO; 666 667 UFSD("ENTER, ino %lu\n", ino); 668 669 if (ino < UFS_ROOTINO || ino > (uspi->s_ncg * uspi->s_ipg)) { 670 ufs_warning(sb, "ufs_read_inode", "bad inode number (%lu)\n", 671 ino); 672 return ERR_PTR(-EIO); 673 } 674 675 inode = iget_locked(sb, ino); 676 if (!inode) 677 return ERR_PTR(-ENOMEM); 678 if (!(inode->i_state & I_NEW)) 679 return inode; 680 681 ufsi = UFS_I(inode); 682 683 bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino)); 684 if (!bh) { 685 ufs_warning(sb, "ufs_read_inode", "unable to read inode %lu\n", 686 inode->i_ino); 687 goto bad_inode; 688 } 689 if ((UFS_SB(sb)->s_flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { 690 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data; 691 692 err = ufs2_read_inode(inode, 693 ufs2_inode + ufs_inotofsbo(inode->i_ino)); 694 } else { 695 struct ufs_inode *ufs_inode = (struct ufs_inode *)bh->b_data; 696 697 err = ufs1_read_inode(inode, 698 ufs_inode + ufs_inotofsbo(inode->i_ino)); 699 } 700 brelse(bh); 701 if (err) 702 goto bad_inode; 703 704 inode_inc_iversion(inode); 705 ufsi->i_lastfrag = 706 (inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift; 707 ufsi->i_dir_start_lookup = 0; 708 ufsi->i_osync = 0; 709 710 ufs_set_inode_ops(inode); 711 712 UFSD("EXIT\n"); 713 unlock_new_inode(inode); 714 return inode; 715 716 bad_inode: 717 iget_failed(inode); 718 return ERR_PTR(err); 719 } 720 721 static void ufs1_update_inode(struct inode *inode, struct ufs_inode *ufs_inode) 722 { 723 struct super_block *sb = inode->i_sb; 724 struct ufs_inode_info *ufsi = UFS_I(inode); 725 726 ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode); 727 ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink); 728 729 ufs_set_inode_uid(sb, ufs_inode, i_uid_read(inode)); 730 ufs_set_inode_gid(sb, ufs_inode, i_gid_read(inode)); 731 732 ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size); 733 ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb, 734 inode_get_atime_sec(inode)); 735 ufs_inode->ui_atime.tv_usec = 0; 736 ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb, 737 inode_get_ctime_sec(inode)); 738 ufs_inode->ui_ctime.tv_usec = 0; 739 ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb, 740 inode_get_mtime_sec(inode)); 741 ufs_inode->ui_mtime.tv_usec = 0; 742 ufs_inode->ui_blocks = cpu_to_fs32(sb, inode->i_blocks); 743 ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags); 744 ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation); 745 746 if ((UFS_SB(sb)->s_flags & UFS_UID_MASK) == UFS_UID_EFT) { 747 ufs_inode->ui_u3.ui_sun.ui_shadow = cpu_to_fs32(sb, ufsi->i_shadow); 748 ufs_inode->ui_u3.ui_sun.ui_oeftflag = cpu_to_fs32(sb, ufsi->i_oeftflag); 749 } 750 751 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { 752 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */ 753 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.i_data[0]; 754 } else if (inode->i_blocks) { 755 memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.i_data, 756 sizeof(ufs_inode->ui_u2.ui_addr)); 757 } 758 else { 759 memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink, 760 sizeof(ufs_inode->ui_u2.ui_symlink)); 761 } 762 763 if (!inode->i_nlink) 764 memset (ufs_inode, 0, sizeof(struct ufs_inode)); 765 } 766 767 static void ufs2_update_inode(struct inode *inode, struct ufs2_inode *ufs_inode) 768 { 769 struct super_block *sb = inode->i_sb; 770 struct ufs_inode_info *ufsi = UFS_I(inode); 771 772 UFSD("ENTER\n"); 773 ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode); 774 ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink); 775 776 ufs_inode->ui_uid = cpu_to_fs32(sb, i_uid_read(inode)); 777 ufs_inode->ui_gid = cpu_to_fs32(sb, i_gid_read(inode)); 778 779 ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size); 780 ufs_inode->ui_atime = cpu_to_fs64(sb, inode_get_atime_sec(inode)); 781 ufs_inode->ui_atimensec = cpu_to_fs32(sb, 782 inode_get_atime_nsec(inode)); 783 ufs_inode->ui_ctime = cpu_to_fs64(sb, inode_get_ctime_sec(inode)); 784 ufs_inode->ui_ctimensec = cpu_to_fs32(sb, 785 inode_get_ctime_nsec(inode)); 786 ufs_inode->ui_mtime = cpu_to_fs64(sb, inode_get_mtime_sec(inode)); 787 ufs_inode->ui_mtimensec = cpu_to_fs32(sb, 788 inode_get_mtime_nsec(inode)); 789 790 ufs_inode->ui_blocks = cpu_to_fs64(sb, inode->i_blocks); 791 ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags); 792 ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation); 793 794 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { 795 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */ 796 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.u2_i_data[0]; 797 } else if (inode->i_blocks) { 798 memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.u2_i_data, 799 sizeof(ufs_inode->ui_u2.ui_addr)); 800 } else { 801 memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink, 802 sizeof(ufs_inode->ui_u2.ui_symlink)); 803 } 804 805 if (!inode->i_nlink) 806 memset (ufs_inode, 0, sizeof(struct ufs2_inode)); 807 UFSD("EXIT\n"); 808 } 809 810 static int ufs_update_inode(struct inode * inode, int do_sync) 811 { 812 struct super_block *sb = inode->i_sb; 813 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 814 struct buffer_head * bh; 815 816 UFSD("ENTER, ino %lu\n", inode->i_ino); 817 818 if (inode->i_ino < UFS_ROOTINO || 819 inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) { 820 ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino); 821 return -1; 822 } 823 824 bh = sb_bread(sb, ufs_inotofsba(inode->i_ino)); 825 if (!bh) { 826 ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino); 827 return -1; 828 } 829 if (uspi->fs_magic == UFS2_MAGIC) { 830 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data; 831 832 ufs2_update_inode(inode, 833 ufs2_inode + ufs_inotofsbo(inode->i_ino)); 834 } else { 835 struct ufs_inode *ufs_inode = (struct ufs_inode *) bh->b_data; 836 837 ufs1_update_inode(inode, ufs_inode + ufs_inotofsbo(inode->i_ino)); 838 } 839 840 mark_buffer_dirty(bh); 841 if (do_sync) 842 sync_dirty_buffer(bh); 843 brelse (bh); 844 845 UFSD("EXIT\n"); 846 return 0; 847 } 848 849 int ufs_write_inode(struct inode *inode, struct writeback_control *wbc) 850 { 851 return ufs_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL); 852 } 853 854 int ufs_sync_inode (struct inode *inode) 855 { 856 return ufs_update_inode (inode, 1); 857 } 858 859 void ufs_evict_inode(struct inode * inode) 860 { 861 int want_delete = 0; 862 863 if (!inode->i_nlink && !is_bad_inode(inode)) 864 want_delete = 1; 865 866 truncate_inode_pages_final(&inode->i_data); 867 if (want_delete) { 868 inode->i_size = 0; 869 if (inode->i_blocks && 870 (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || 871 S_ISLNK(inode->i_mode))) 872 ufs_truncate_blocks(inode); 873 ufs_update_inode(inode, inode_needs_sync(inode)); 874 } 875 876 invalidate_inode_buffers(inode); 877 clear_inode(inode); 878 879 if (want_delete) 880 ufs_free_inode(inode); 881 } 882 883 struct to_free { 884 struct inode *inode; 885 u64 to; 886 unsigned count; 887 }; 888 889 static inline void free_data(struct to_free *ctx, u64 from, unsigned count) 890 { 891 if (ctx->count && ctx->to != from) { 892 ufs_free_blocks(ctx->inode, ctx->to - ctx->count, ctx->count); 893 ctx->count = 0; 894 } 895 ctx->count += count; 896 ctx->to = from + count; 897 } 898 899 #define DIRECT_FRAGMENT ((inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift) 900 901 static void ufs_trunc_direct(struct inode *inode) 902 { 903 struct ufs_inode_info *ufsi = UFS_I(inode); 904 struct super_block * sb; 905 struct ufs_sb_private_info * uspi; 906 void *p; 907 u64 frag1, frag2, frag3, frag4, block1, block2; 908 struct to_free ctx = {.inode = inode}; 909 unsigned i, tmp; 910 911 UFSD("ENTER: ino %lu\n", inode->i_ino); 912 913 sb = inode->i_sb; 914 uspi = UFS_SB(sb)->s_uspi; 915 916 frag1 = DIRECT_FRAGMENT; 917 frag4 = min_t(u64, UFS_NDIR_FRAGMENT, ufsi->i_lastfrag); 918 frag2 = ((frag1 & uspi->s_fpbmask) ? ((frag1 | uspi->s_fpbmask) + 1) : frag1); 919 frag3 = frag4 & ~uspi->s_fpbmask; 920 block1 = block2 = 0; 921 if (frag2 > frag3) { 922 frag2 = frag4; 923 frag3 = frag4 = 0; 924 } else if (frag2 < frag3) { 925 block1 = ufs_fragstoblks (frag2); 926 block2 = ufs_fragstoblks (frag3); 927 } 928 929 UFSD("ino %lu, frag1 %llu, frag2 %llu, block1 %llu, block2 %llu," 930 " frag3 %llu, frag4 %llu\n", inode->i_ino, 931 (unsigned long long)frag1, (unsigned long long)frag2, 932 (unsigned long long)block1, (unsigned long long)block2, 933 (unsigned long long)frag3, (unsigned long long)frag4); 934 935 if (frag1 >= frag2) 936 goto next1; 937 938 /* 939 * Free first free fragments 940 */ 941 p = ufs_get_direct_data_ptr(uspi, ufsi, ufs_fragstoblks(frag1)); 942 tmp = ufs_data_ptr_to_cpu(sb, p); 943 if (!tmp ) 944 ufs_panic (sb, "ufs_trunc_direct", "internal error"); 945 frag2 -= frag1; 946 frag1 = ufs_fragnum (frag1); 947 948 ufs_free_fragments(inode, tmp + frag1, frag2); 949 950 next1: 951 /* 952 * Free whole blocks 953 */ 954 for (i = block1 ; i < block2; i++) { 955 p = ufs_get_direct_data_ptr(uspi, ufsi, i); 956 tmp = ufs_data_ptr_to_cpu(sb, p); 957 if (!tmp) 958 continue; 959 write_seqlock(&ufsi->meta_lock); 960 ufs_data_ptr_clear(uspi, p); 961 write_sequnlock(&ufsi->meta_lock); 962 963 free_data(&ctx, tmp, uspi->s_fpb); 964 } 965 966 free_data(&ctx, 0, 0); 967 968 if (frag3 >= frag4) 969 goto next3; 970 971 /* 972 * Free last free fragments 973 */ 974 p = ufs_get_direct_data_ptr(uspi, ufsi, ufs_fragstoblks(frag3)); 975 tmp = ufs_data_ptr_to_cpu(sb, p); 976 if (!tmp ) 977 ufs_panic(sb, "ufs_truncate_direct", "internal error"); 978 frag4 = ufs_fragnum (frag4); 979 write_seqlock(&ufsi->meta_lock); 980 ufs_data_ptr_clear(uspi, p); 981 write_sequnlock(&ufsi->meta_lock); 982 983 ufs_free_fragments (inode, tmp, frag4); 984 next3: 985 986 UFSD("EXIT: ino %lu\n", inode->i_ino); 987 } 988 989 static void free_full_branch(struct inode *inode, u64 ind_block, int depth) 990 { 991 struct super_block *sb = inode->i_sb; 992 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 993 struct ufs_buffer_head *ubh = ubh_bread(sb, ind_block, uspi->s_bsize); 994 unsigned i; 995 996 if (!ubh) 997 return; 998 999 if (--depth) { 1000 for (i = 0; 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 free_full_branch(inode, block, depth); 1005 } 1006 } else { 1007 struct to_free ctx = {.inode = inode}; 1008 1009 for (i = 0; i < uspi->s_apb; i++) { 1010 void *p = ubh_get_data_ptr(uspi, ubh, i); 1011 u64 block = ufs_data_ptr_to_cpu(sb, p); 1012 if (block) 1013 free_data(&ctx, block, uspi->s_fpb); 1014 } 1015 free_data(&ctx, 0, 0); 1016 } 1017 1018 ubh_bforget(ubh); 1019 ufs_free_blocks(inode, ind_block, uspi->s_fpb); 1020 } 1021 1022 static void free_branch_tail(struct inode *inode, unsigned from, struct ufs_buffer_head *ubh, int depth) 1023 { 1024 struct super_block *sb = inode->i_sb; 1025 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 1026 unsigned i; 1027 1028 if (--depth) { 1029 for (i = from; i < uspi->s_apb ; i++) { 1030 void *p = ubh_get_data_ptr(uspi, ubh, i); 1031 u64 block = ufs_data_ptr_to_cpu(sb, p); 1032 if (block) { 1033 write_seqlock(&UFS_I(inode)->meta_lock); 1034 ufs_data_ptr_clear(uspi, p); 1035 write_sequnlock(&UFS_I(inode)->meta_lock); 1036 ubh_mark_buffer_dirty(ubh); 1037 free_full_branch(inode, block, depth); 1038 } 1039 } 1040 } else { 1041 struct to_free ctx = {.inode = inode}; 1042 1043 for (i = from; i < uspi->s_apb; i++) { 1044 void *p = ubh_get_data_ptr(uspi, ubh, i); 1045 u64 block = ufs_data_ptr_to_cpu(sb, p); 1046 if (block) { 1047 write_seqlock(&UFS_I(inode)->meta_lock); 1048 ufs_data_ptr_clear(uspi, p); 1049 write_sequnlock(&UFS_I(inode)->meta_lock); 1050 ubh_mark_buffer_dirty(ubh); 1051 free_data(&ctx, block, uspi->s_fpb); 1052 } 1053 } 1054 free_data(&ctx, 0, 0); 1055 } 1056 if (IS_SYNC(inode) && ubh_buffer_dirty(ubh)) 1057 ubh_sync_block(ubh); 1058 ubh_brelse(ubh); 1059 } 1060 1061 static int ufs_alloc_lastblock(struct inode *inode, loff_t size) 1062 { 1063 int err = 0; 1064 struct super_block *sb = inode->i_sb; 1065 struct address_space *mapping = inode->i_mapping; 1066 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 1067 unsigned i, end; 1068 sector_t lastfrag; 1069 struct folio *folio; 1070 struct buffer_head *bh; 1071 u64 phys64; 1072 1073 lastfrag = (size + uspi->s_fsize - 1) >> uspi->s_fshift; 1074 1075 if (!lastfrag) 1076 goto out; 1077 1078 lastfrag--; 1079 1080 folio = ufs_get_locked_folio(mapping, lastfrag >> 1081 (PAGE_SHIFT - inode->i_blkbits)); 1082 if (IS_ERR(folio)) { 1083 err = -EIO; 1084 goto out; 1085 } 1086 1087 end = lastfrag & ((1 << (PAGE_SHIFT - inode->i_blkbits)) - 1); 1088 bh = folio_buffers(folio); 1089 for (i = 0; i < end; ++i) 1090 bh = bh->b_this_page; 1091 1092 err = ufs_getfrag_block(inode, lastfrag, bh, 1); 1093 1094 if (unlikely(err)) 1095 goto out_unlock; 1096 1097 if (buffer_new(bh)) { 1098 clear_buffer_new(bh); 1099 clean_bdev_bh_alias(bh); 1100 /* 1101 * we do not zeroize fragment, because of 1102 * if it maped to hole, it already contains zeroes 1103 */ 1104 set_buffer_uptodate(bh); 1105 mark_buffer_dirty(bh); 1106 folio_mark_dirty(folio); 1107 } 1108 1109 if (lastfrag >= UFS_IND_FRAGMENT) { 1110 end = uspi->s_fpb - ufs_fragnum(lastfrag) - 1; 1111 phys64 = bh->b_blocknr + 1; 1112 for (i = 0; i < end; ++i) { 1113 bh = sb_getblk(sb, i + phys64); 1114 lock_buffer(bh); 1115 memset(bh->b_data, 0, sb->s_blocksize); 1116 set_buffer_uptodate(bh); 1117 mark_buffer_dirty(bh); 1118 unlock_buffer(bh); 1119 sync_dirty_buffer(bh); 1120 brelse(bh); 1121 } 1122 } 1123 out_unlock: 1124 ufs_put_locked_folio(folio); 1125 out: 1126 return err; 1127 } 1128 1129 static void ufs_truncate_blocks(struct inode *inode) 1130 { 1131 struct ufs_inode_info *ufsi = UFS_I(inode); 1132 struct super_block *sb = inode->i_sb; 1133 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 1134 unsigned offsets[4]; 1135 int depth; 1136 int depth2; 1137 unsigned i; 1138 struct ufs_buffer_head *ubh[3]; 1139 void *p; 1140 u64 block; 1141 1142 if (inode->i_size) { 1143 sector_t last = (inode->i_size - 1) >> uspi->s_bshift; 1144 depth = ufs_block_to_path(inode, last, offsets); 1145 if (!depth) 1146 return; 1147 } else { 1148 depth = 1; 1149 } 1150 1151 for (depth2 = depth - 1; depth2; depth2--) 1152 if (offsets[depth2] != uspi->s_apb - 1) 1153 break; 1154 1155 mutex_lock(&ufsi->truncate_mutex); 1156 if (depth == 1) { 1157 ufs_trunc_direct(inode); 1158 offsets[0] = UFS_IND_BLOCK; 1159 } else { 1160 /* get the blocks that should be partially emptied */ 1161 p = ufs_get_direct_data_ptr(uspi, ufsi, offsets[0]++); 1162 for (i = 0; i < depth2; i++) { 1163 block = ufs_data_ptr_to_cpu(sb, p); 1164 if (!block) 1165 break; 1166 ubh[i] = ubh_bread(sb, block, uspi->s_bsize); 1167 if (!ubh[i]) { 1168 write_seqlock(&ufsi->meta_lock); 1169 ufs_data_ptr_clear(uspi, p); 1170 write_sequnlock(&ufsi->meta_lock); 1171 break; 1172 } 1173 p = ubh_get_data_ptr(uspi, ubh[i], offsets[i + 1]++); 1174 } 1175 while (i--) 1176 free_branch_tail(inode, offsets[i + 1], ubh[i], depth - i - 1); 1177 } 1178 for (i = offsets[0]; i <= UFS_TIND_BLOCK; i++) { 1179 p = ufs_get_direct_data_ptr(uspi, ufsi, i); 1180 block = ufs_data_ptr_to_cpu(sb, p); 1181 if (block) { 1182 write_seqlock(&ufsi->meta_lock); 1183 ufs_data_ptr_clear(uspi, p); 1184 write_sequnlock(&ufsi->meta_lock); 1185 free_full_branch(inode, block, i - UFS_IND_BLOCK + 1); 1186 } 1187 } 1188 read_seqlock_excl(&ufsi->meta_lock); 1189 ufsi->i_lastfrag = DIRECT_FRAGMENT; 1190 read_sequnlock_excl(&ufsi->meta_lock); 1191 mark_inode_dirty(inode); 1192 mutex_unlock(&ufsi->truncate_mutex); 1193 } 1194 1195 static int ufs_truncate(struct inode *inode, loff_t size) 1196 { 1197 int err = 0; 1198 1199 UFSD("ENTER: ino %lu, i_size: %llu, old_i_size: %llu\n", 1200 inode->i_ino, (unsigned long long)size, 1201 (unsigned long long)i_size_read(inode)); 1202 1203 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || 1204 S_ISLNK(inode->i_mode))) 1205 return -EINVAL; 1206 if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) 1207 return -EPERM; 1208 1209 err = ufs_alloc_lastblock(inode, size); 1210 1211 if (err) 1212 goto out; 1213 1214 block_truncate_page(inode->i_mapping, size, ufs_getfrag_block); 1215 1216 truncate_setsize(inode, size); 1217 1218 ufs_truncate_blocks(inode); 1219 inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode)); 1220 mark_inode_dirty(inode); 1221 out: 1222 UFSD("EXIT: err %d\n", err); 1223 return err; 1224 } 1225 1226 int ufs_setattr(struct mnt_idmap *idmap, struct dentry *dentry, 1227 struct iattr *attr) 1228 { 1229 struct inode *inode = d_inode(dentry); 1230 unsigned int ia_valid = attr->ia_valid; 1231 int error; 1232 1233 error = setattr_prepare(&nop_mnt_idmap, dentry, attr); 1234 if (error) 1235 return error; 1236 1237 if (ia_valid & ATTR_SIZE && attr->ia_size != inode->i_size) { 1238 error = ufs_truncate(inode, attr->ia_size); 1239 if (error) 1240 return error; 1241 } 1242 1243 setattr_copy(&nop_mnt_idmap, inode, attr); 1244 mark_inode_dirty(inode); 1245 return 0; 1246 } 1247 1248 const struct inode_operations ufs_file_inode_operations = { 1249 .setattr = ufs_setattr, 1250 }; 1251