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