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