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 * @phys: pointer to where we save physical number of new allocated fragments, 249 * NULL if we allocate not data(indirect blocks for example). 250 * @new: we set it if we allocate new block 251 * @locked_page: for ufs_new_fragments() 252 */ 253 static u64 254 ufs_inode_getfrag(struct inode *inode, unsigned index, 255 sector_t new_fragment, int *err, 256 long *phys, int *new, struct page *locked_page) 257 { 258 struct ufs_inode_info *ufsi = UFS_I(inode); 259 struct super_block *sb = inode->i_sb; 260 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 261 u64 tmp, goal, lastfrag; 262 unsigned nfrags = uspi->s_fpb; 263 void *p; 264 265 /* TODO : to be done for write support 266 if ( (flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) 267 goto ufs2; 268 */ 269 270 p = ufs_get_direct_data_ptr(uspi, ufsi, index); 271 tmp = ufs_data_ptr_to_cpu(sb, p); 272 if (tmp) 273 goto out; 274 275 lastfrag = ufsi->i_lastfrag; 276 277 /* will that be a new tail? */ 278 if (new_fragment < UFS_NDIR_FRAGMENT && new_fragment >= lastfrag) 279 nfrags = (new_fragment & uspi->s_fpbmask) + 1; 280 281 goal = 0; 282 if (index) { 283 goal = ufs_data_ptr_to_cpu(sb, 284 ufs_get_direct_data_ptr(uspi, ufsi, index - 1)); 285 if (goal) 286 goal += uspi->s_fpb; 287 } 288 tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), 289 goal, uspi->s_fpb, err, 290 phys != NULL ? locked_page : NULL); 291 292 if (!tmp) { 293 *err = -ENOSPC; 294 return 0; 295 } 296 297 if (phys) { 298 *err = 0; 299 *new = 1; 300 } 301 inode->i_ctime = CURRENT_TIME_SEC; 302 if (IS_SYNC(inode)) 303 ufs_sync_inode (inode); 304 mark_inode_dirty(inode); 305 out: 306 return tmp + uspi->s_sbbase; 307 308 /* This part : To be implemented .... 309 Required only for writing, not required for READ-ONLY. 310 ufs2: 311 312 u2_block = ufs_fragstoblks(fragment); 313 u2_blockoff = ufs_fragnum(fragment); 314 p = ufsi->i_u1.u2_i_data + block; 315 goal = 0; 316 317 repeat2: 318 tmp = fs32_to_cpu(sb, *p); 319 lastfrag = ufsi->i_lastfrag; 320 321 */ 322 } 323 324 /** 325 * ufs_inode_getblock() - allocate new block 326 * @inode: pointer to inode 327 * @ind_block: block number of the indirect block 328 * @index: number of pointer within the indirect block 329 * @new_fragment: number of new allocated fragment 330 * (block will hold this fragment and also uspi->s_fpb-1) 331 * @err: see ufs_inode_getfrag() 332 * @phys: see ufs_inode_getfrag() 333 * @new: see ufs_inode_getfrag() 334 * @locked_page: see ufs_inode_getfrag() 335 */ 336 static u64 337 ufs_inode_getblock(struct inode *inode, u64 ind_block, 338 unsigned index, sector_t new_fragment, int *err, 339 long *phys, int *new, struct page *locked_page) 340 { 341 struct super_block *sb = inode->i_sb; 342 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 343 int shift = uspi->s_apbshift - uspi->s_fpbshift; 344 u64 tmp = 0, goal; 345 struct buffer_head *bh; 346 void *p; 347 348 if (!ind_block) 349 return 0; 350 351 bh = sb_bread(sb, ind_block + (index >> shift)); 352 if (unlikely(!bh)) { 353 *err = -EIO; 354 return 0; 355 } 356 357 index &= uspi->s_apbmask >> uspi->s_fpbshift; 358 if (uspi->fs_magic == UFS2_MAGIC) 359 p = (__fs64 *)bh->b_data + index; 360 else 361 p = (__fs32 *)bh->b_data + index; 362 363 tmp = ufs_data_ptr_to_cpu(sb, p); 364 if (tmp) 365 goto out; 366 367 if (index && (uspi->fs_magic == UFS2_MAGIC ? 368 (tmp = fs64_to_cpu(sb, ((__fs64 *)bh->b_data)[index-1])) : 369 (tmp = fs32_to_cpu(sb, ((__fs32 *)bh->b_data)[index-1])))) 370 goal = tmp + uspi->s_fpb; 371 else 372 goal = bh->b_blocknr + uspi->s_fpb; 373 tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), goal, 374 uspi->s_fpb, err, locked_page); 375 if (!tmp) 376 goto out; 377 378 if (new) 379 *new = 1; 380 381 mark_buffer_dirty(bh); 382 if (IS_SYNC(inode)) 383 sync_dirty_buffer(bh); 384 inode->i_ctime = CURRENT_TIME_SEC; 385 mark_inode_dirty(inode); 386 out: 387 brelse (bh); 388 UFSD("EXIT\n"); 389 if (tmp) 390 tmp += uspi->s_sbbase; 391 return tmp; 392 } 393 394 /** 395 * ufs_getfrag_block() - `get_block_t' function, interface between UFS and 396 * readpage, writepage and so on 397 */ 398 399 static int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create) 400 { 401 struct super_block * sb = inode->i_sb; 402 struct ufs_sb_info * sbi = UFS_SB(sb); 403 struct ufs_sb_private_info * uspi = sbi->s_uspi; 404 struct buffer_head * bh; 405 int ret, err, new; 406 unsigned offsets[4]; 407 int depth = ufs_block_to_path(inode, fragment >> uspi->s_fpbshift, offsets); 408 unsigned long phys; 409 u64 phys64 = 0; 410 unsigned frag = fragment & uspi->s_fpbmask; 411 412 if (!create) { 413 phys64 = ufs_frag_map(inode, offsets, depth); 414 if (phys64) { 415 phys64 += frag; 416 map_bh(bh_result, sb, phys64); 417 } 418 return 0; 419 } 420 421 /* This code entered only while writing ....? */ 422 423 err = -EIO; 424 new = 0; 425 ret = 0; 426 bh = NULL; 427 428 mutex_lock(&UFS_I(inode)->truncate_mutex); 429 430 UFSD("ENTER, ino %lu, fragment %llu\n", inode->i_ino, (unsigned long long)fragment); 431 if (!depth) 432 goto abort_too_big; 433 434 err = 0; 435 436 if (UFS_I(inode)->i_lastfrag < UFS_NDIR_FRAGMENT) { 437 unsigned lastfrag = UFS_I(inode)->i_lastfrag; 438 unsigned tailfrags = lastfrag & uspi->s_fpbmask; 439 if (tailfrags && fragment >= lastfrag) { 440 if (!ufs_extend_tail(inode, fragment, 441 &err, bh_result->b_page)) 442 goto abort; 443 } 444 } 445 446 if (depth == 1) { 447 phys64 = ufs_inode_getfrag(inode, offsets[0], fragment, 448 &err, &phys, &new, bh_result->b_page); 449 } else { 450 int i; 451 phys64 = ufs_inode_getfrag(inode, offsets[0], fragment, 452 &err, NULL, NULL, bh_result->b_page); 453 for (i = 1; i < depth - 1; i++) 454 phys64 = ufs_inode_getblock(inode, phys64, offsets[i], 455 fragment, &err, NULL, NULL, NULL); 456 phys64 = ufs_inode_getblock(inode, phys64, offsets[depth - 1], 457 fragment, &err, &phys, &new, bh_result->b_page); 458 } 459 if (phys64) { 460 phys64 += frag; 461 phys = phys64; 462 } 463 if (err) 464 goto abort; 465 if (new) 466 set_buffer_new(bh_result); 467 map_bh(bh_result, sb, phys); 468 abort: 469 mutex_unlock(&UFS_I(inode)->truncate_mutex); 470 471 return err; 472 473 abort_too_big: 474 ufs_warning(sb, "ufs_get_block", "block > big"); 475 goto abort; 476 } 477 478 static int ufs_writepage(struct page *page, struct writeback_control *wbc) 479 { 480 return block_write_full_page(page,ufs_getfrag_block,wbc); 481 } 482 483 static int ufs_readpage(struct file *file, struct page *page) 484 { 485 return block_read_full_page(page,ufs_getfrag_block); 486 } 487 488 int ufs_prepare_chunk(struct page *page, loff_t pos, unsigned len) 489 { 490 return __block_write_begin(page, pos, len, ufs_getfrag_block); 491 } 492 493 static void ufs_truncate_blocks(struct inode *); 494 495 static void ufs_write_failed(struct address_space *mapping, loff_t to) 496 { 497 struct inode *inode = mapping->host; 498 499 if (to > inode->i_size) { 500 truncate_pagecache(inode, inode->i_size); 501 ufs_truncate_blocks(inode); 502 } 503 } 504 505 static int ufs_write_begin(struct file *file, struct address_space *mapping, 506 loff_t pos, unsigned len, unsigned flags, 507 struct page **pagep, void **fsdata) 508 { 509 int ret; 510 511 ret = block_write_begin(mapping, pos, len, flags, pagep, 512 ufs_getfrag_block); 513 if (unlikely(ret)) 514 ufs_write_failed(mapping, pos + len); 515 516 return ret; 517 } 518 519 static int ufs_write_end(struct file *file, struct address_space *mapping, 520 loff_t pos, unsigned len, unsigned copied, 521 struct page *page, void *fsdata) 522 { 523 int ret; 524 525 ret = generic_write_end(file, mapping, pos, len, copied, page, fsdata); 526 if (ret < len) 527 ufs_write_failed(mapping, pos + len); 528 return ret; 529 } 530 531 static sector_t ufs_bmap(struct address_space *mapping, sector_t block) 532 { 533 return generic_block_bmap(mapping,block,ufs_getfrag_block); 534 } 535 536 const struct address_space_operations ufs_aops = { 537 .readpage = ufs_readpage, 538 .writepage = ufs_writepage, 539 .write_begin = ufs_write_begin, 540 .write_end = ufs_write_end, 541 .bmap = ufs_bmap 542 }; 543 544 static void ufs_set_inode_ops(struct inode *inode) 545 { 546 if (S_ISREG(inode->i_mode)) { 547 inode->i_op = &ufs_file_inode_operations; 548 inode->i_fop = &ufs_file_operations; 549 inode->i_mapping->a_ops = &ufs_aops; 550 } else if (S_ISDIR(inode->i_mode)) { 551 inode->i_op = &ufs_dir_inode_operations; 552 inode->i_fop = &ufs_dir_operations; 553 inode->i_mapping->a_ops = &ufs_aops; 554 } else if (S_ISLNK(inode->i_mode)) { 555 if (!inode->i_blocks) { 556 inode->i_op = &ufs_fast_symlink_inode_operations; 557 inode->i_link = (char *)UFS_I(inode)->i_u1.i_symlink; 558 } else { 559 inode->i_op = &ufs_symlink_inode_operations; 560 inode->i_mapping->a_ops = &ufs_aops; 561 } 562 } else 563 init_special_inode(inode, inode->i_mode, 564 ufs_get_inode_dev(inode->i_sb, UFS_I(inode))); 565 } 566 567 static int ufs1_read_inode(struct inode *inode, struct ufs_inode *ufs_inode) 568 { 569 struct ufs_inode_info *ufsi = UFS_I(inode); 570 struct super_block *sb = inode->i_sb; 571 umode_t mode; 572 573 /* 574 * Copy data to the in-core inode. 575 */ 576 inode->i_mode = mode = fs16_to_cpu(sb, ufs_inode->ui_mode); 577 set_nlink(inode, fs16_to_cpu(sb, ufs_inode->ui_nlink)); 578 if (inode->i_nlink == 0) { 579 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino); 580 return -1; 581 } 582 583 /* 584 * Linux now has 32-bit uid and gid, so we can support EFT. 585 */ 586 i_uid_write(inode, ufs_get_inode_uid(sb, ufs_inode)); 587 i_gid_write(inode, ufs_get_inode_gid(sb, ufs_inode)); 588 589 inode->i_size = fs64_to_cpu(sb, ufs_inode->ui_size); 590 inode->i_atime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_atime.tv_sec); 591 inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_ctime.tv_sec); 592 inode->i_mtime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_mtime.tv_sec); 593 inode->i_mtime.tv_nsec = 0; 594 inode->i_atime.tv_nsec = 0; 595 inode->i_ctime.tv_nsec = 0; 596 inode->i_blocks = fs32_to_cpu(sb, ufs_inode->ui_blocks); 597 inode->i_generation = fs32_to_cpu(sb, ufs_inode->ui_gen); 598 ufsi->i_flags = fs32_to_cpu(sb, ufs_inode->ui_flags); 599 ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); 600 ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); 601 602 603 if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { 604 memcpy(ufsi->i_u1.i_data, &ufs_inode->ui_u2.ui_addr, 605 sizeof(ufs_inode->ui_u2.ui_addr)); 606 } else { 607 memcpy(ufsi->i_u1.i_symlink, ufs_inode->ui_u2.ui_symlink, 608 sizeof(ufs_inode->ui_u2.ui_symlink) - 1); 609 ufsi->i_u1.i_symlink[sizeof(ufs_inode->ui_u2.ui_symlink) - 1] = 0; 610 } 611 return 0; 612 } 613 614 static int ufs2_read_inode(struct inode *inode, struct ufs2_inode *ufs2_inode) 615 { 616 struct ufs_inode_info *ufsi = UFS_I(inode); 617 struct super_block *sb = inode->i_sb; 618 umode_t mode; 619 620 UFSD("Reading ufs2 inode, ino %lu\n", inode->i_ino); 621 /* 622 * Copy data to the in-core inode. 623 */ 624 inode->i_mode = mode = fs16_to_cpu(sb, ufs2_inode->ui_mode); 625 set_nlink(inode, fs16_to_cpu(sb, ufs2_inode->ui_nlink)); 626 if (inode->i_nlink == 0) { 627 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino); 628 return -1; 629 } 630 631 /* 632 * Linux now has 32-bit uid and gid, so we can support EFT. 633 */ 634 i_uid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_uid)); 635 i_gid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_gid)); 636 637 inode->i_size = fs64_to_cpu(sb, ufs2_inode->ui_size); 638 inode->i_atime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_atime); 639 inode->i_ctime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_ctime); 640 inode->i_mtime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_mtime); 641 inode->i_atime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_atimensec); 642 inode->i_ctime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_ctimensec); 643 inode->i_mtime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_mtimensec); 644 inode->i_blocks = fs64_to_cpu(sb, ufs2_inode->ui_blocks); 645 inode->i_generation = fs32_to_cpu(sb, ufs2_inode->ui_gen); 646 ufsi->i_flags = fs32_to_cpu(sb, ufs2_inode->ui_flags); 647 /* 648 ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); 649 ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); 650 */ 651 652 if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { 653 memcpy(ufsi->i_u1.u2_i_data, &ufs2_inode->ui_u2.ui_addr, 654 sizeof(ufs2_inode->ui_u2.ui_addr)); 655 } else { 656 memcpy(ufsi->i_u1.i_symlink, ufs2_inode->ui_u2.ui_symlink, 657 sizeof(ufs2_inode->ui_u2.ui_symlink) - 1); 658 ufsi->i_u1.i_symlink[sizeof(ufs2_inode->ui_u2.ui_symlink) - 1] = 0; 659 } 660 return 0; 661 } 662 663 struct inode *ufs_iget(struct super_block *sb, unsigned long ino) 664 { 665 struct ufs_inode_info *ufsi; 666 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 667 struct buffer_head * bh; 668 struct inode *inode; 669 int err; 670 671 UFSD("ENTER, ino %lu\n", ino); 672 673 if (ino < UFS_ROOTINO || ino > (uspi->s_ncg * uspi->s_ipg)) { 674 ufs_warning(sb, "ufs_read_inode", "bad inode number (%lu)\n", 675 ino); 676 return ERR_PTR(-EIO); 677 } 678 679 inode = iget_locked(sb, ino); 680 if (!inode) 681 return ERR_PTR(-ENOMEM); 682 if (!(inode->i_state & I_NEW)) 683 return inode; 684 685 ufsi = UFS_I(inode); 686 687 bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino)); 688 if (!bh) { 689 ufs_warning(sb, "ufs_read_inode", "unable to read inode %lu\n", 690 inode->i_ino); 691 goto bad_inode; 692 } 693 if ((UFS_SB(sb)->s_flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { 694 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data; 695 696 err = ufs2_read_inode(inode, 697 ufs2_inode + ufs_inotofsbo(inode->i_ino)); 698 } else { 699 struct ufs_inode *ufs_inode = (struct ufs_inode *)bh->b_data; 700 701 err = ufs1_read_inode(inode, 702 ufs_inode + ufs_inotofsbo(inode->i_ino)); 703 } 704 705 if (err) 706 goto bad_inode; 707 inode->i_version++; 708 ufsi->i_lastfrag = 709 (inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift; 710 ufsi->i_dir_start_lookup = 0; 711 ufsi->i_osync = 0; 712 713 ufs_set_inode_ops(inode); 714 715 brelse(bh); 716 717 UFSD("EXIT\n"); 718 unlock_new_inode(inode); 719 return inode; 720 721 bad_inode: 722 iget_failed(inode); 723 return ERR_PTR(-EIO); 724 } 725 726 static void ufs1_update_inode(struct inode *inode, struct ufs_inode *ufs_inode) 727 { 728 struct super_block *sb = inode->i_sb; 729 struct ufs_inode_info *ufsi = UFS_I(inode); 730 731 ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode); 732 ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink); 733 734 ufs_set_inode_uid(sb, ufs_inode, i_uid_read(inode)); 735 ufs_set_inode_gid(sb, ufs_inode, i_gid_read(inode)); 736 737 ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size); 738 ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb, inode->i_atime.tv_sec); 739 ufs_inode->ui_atime.tv_usec = 0; 740 ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb, inode->i_ctime.tv_sec); 741 ufs_inode->ui_ctime.tv_usec = 0; 742 ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb, inode->i_mtime.tv_sec); 743 ufs_inode->ui_mtime.tv_usec = 0; 744 ufs_inode->ui_blocks = cpu_to_fs32(sb, inode->i_blocks); 745 ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags); 746 ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation); 747 748 if ((UFS_SB(sb)->s_flags & UFS_UID_MASK) == UFS_UID_EFT) { 749 ufs_inode->ui_u3.ui_sun.ui_shadow = cpu_to_fs32(sb, ufsi->i_shadow); 750 ufs_inode->ui_u3.ui_sun.ui_oeftflag = cpu_to_fs32(sb, ufsi->i_oeftflag); 751 } 752 753 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { 754 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */ 755 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.i_data[0]; 756 } else if (inode->i_blocks) { 757 memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.i_data, 758 sizeof(ufs_inode->ui_u2.ui_addr)); 759 } 760 else { 761 memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink, 762 sizeof(ufs_inode->ui_u2.ui_symlink)); 763 } 764 765 if (!inode->i_nlink) 766 memset (ufs_inode, 0, sizeof(struct ufs_inode)); 767 } 768 769 static void ufs2_update_inode(struct inode *inode, struct ufs2_inode *ufs_inode) 770 { 771 struct super_block *sb = inode->i_sb; 772 struct ufs_inode_info *ufsi = UFS_I(inode); 773 774 UFSD("ENTER\n"); 775 ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode); 776 ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink); 777 778 ufs_inode->ui_uid = cpu_to_fs32(sb, i_uid_read(inode)); 779 ufs_inode->ui_gid = cpu_to_fs32(sb, i_gid_read(inode)); 780 781 ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size); 782 ufs_inode->ui_atime = cpu_to_fs64(sb, inode->i_atime.tv_sec); 783 ufs_inode->ui_atimensec = cpu_to_fs32(sb, inode->i_atime.tv_nsec); 784 ufs_inode->ui_ctime = cpu_to_fs64(sb, inode->i_ctime.tv_sec); 785 ufs_inode->ui_ctimensec = cpu_to_fs32(sb, inode->i_ctime.tv_nsec); 786 ufs_inode->ui_mtime = cpu_to_fs64(sb, inode->i_mtime.tv_sec); 787 ufs_inode->ui_mtimensec = cpu_to_fs32(sb, inode->i_mtime.tv_nsec); 788 789 ufs_inode->ui_blocks = cpu_to_fs64(sb, inode->i_blocks); 790 ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags); 791 ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation); 792 793 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { 794 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */ 795 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.u2_i_data[0]; 796 } else if (inode->i_blocks) { 797 memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.u2_i_data, 798 sizeof(ufs_inode->ui_u2.ui_addr)); 799 } else { 800 memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink, 801 sizeof(ufs_inode->ui_u2.ui_symlink)); 802 } 803 804 if (!inode->i_nlink) 805 memset (ufs_inode, 0, sizeof(struct ufs2_inode)); 806 UFSD("EXIT\n"); 807 } 808 809 static int ufs_update_inode(struct inode * inode, int do_sync) 810 { 811 struct super_block *sb = inode->i_sb; 812 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 813 struct buffer_head * bh; 814 815 UFSD("ENTER, ino %lu\n", inode->i_ino); 816 817 if (inode->i_ino < UFS_ROOTINO || 818 inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) { 819 ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino); 820 return -1; 821 } 822 823 bh = sb_bread(sb, ufs_inotofsba(inode->i_ino)); 824 if (!bh) { 825 ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino); 826 return -1; 827 } 828 if (uspi->fs_magic == UFS2_MAGIC) { 829 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data; 830 831 ufs2_update_inode(inode, 832 ufs2_inode + ufs_inotofsbo(inode->i_ino)); 833 } else { 834 struct ufs_inode *ufs_inode = (struct ufs_inode *) bh->b_data; 835 836 ufs1_update_inode(inode, ufs_inode + ufs_inotofsbo(inode->i_ino)); 837 } 838 839 mark_buffer_dirty(bh); 840 if (do_sync) 841 sync_dirty_buffer(bh); 842 brelse (bh); 843 844 UFSD("EXIT\n"); 845 return 0; 846 } 847 848 int ufs_write_inode(struct inode *inode, struct writeback_control *wbc) 849 { 850 return ufs_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL); 851 } 852 853 int ufs_sync_inode (struct inode *inode) 854 { 855 return ufs_update_inode (inode, 1); 856 } 857 858 void ufs_evict_inode(struct inode * inode) 859 { 860 int want_delete = 0; 861 862 if (!inode->i_nlink && !is_bad_inode(inode)) 863 want_delete = 1; 864 865 truncate_inode_pages_final(&inode->i_data); 866 if (want_delete) { 867 inode->i_size = 0; 868 if (inode->i_blocks) 869 ufs_truncate_blocks(inode); 870 } 871 872 invalidate_inode_buffers(inode); 873 clear_inode(inode); 874 875 if (want_delete) 876 ufs_free_inode(inode); 877 } 878 879 struct to_free { 880 struct inode *inode; 881 u64 to; 882 unsigned count; 883 }; 884 885 static inline void free_data(struct to_free *ctx, u64 from, unsigned count) 886 { 887 if (ctx->count && ctx->to != from) { 888 ufs_free_blocks(ctx->inode, ctx->to - ctx->count, ctx->count); 889 ctx->count = 0; 890 } 891 ctx->count += count; 892 ctx->to = from + count; 893 } 894 895 #define DIRECT_BLOCK ((inode->i_size + uspi->s_bsize - 1) >> uspi->s_bshift) 896 #define DIRECT_FRAGMENT ((inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift) 897 898 static void ufs_trunc_direct(struct inode *inode) 899 { 900 struct ufs_inode_info *ufsi = UFS_I(inode); 901 struct super_block * sb; 902 struct ufs_sb_private_info * uspi; 903 void *p; 904 u64 frag1, frag2, frag3, frag4, block1, block2; 905 struct to_free ctx = {.inode = inode}; 906 unsigned i, tmp; 907 908 UFSD("ENTER: ino %lu\n", inode->i_ino); 909 910 sb = inode->i_sb; 911 uspi = UFS_SB(sb)->s_uspi; 912 913 frag1 = DIRECT_FRAGMENT; 914 frag4 = min_t(u64, UFS_NDIR_FRAGMENT, ufsi->i_lastfrag); 915 frag2 = ((frag1 & uspi->s_fpbmask) ? ((frag1 | uspi->s_fpbmask) + 1) : frag1); 916 frag3 = frag4 & ~uspi->s_fpbmask; 917 block1 = block2 = 0; 918 if (frag2 > frag3) { 919 frag2 = frag4; 920 frag3 = frag4 = 0; 921 } else if (frag2 < frag3) { 922 block1 = ufs_fragstoblks (frag2); 923 block2 = ufs_fragstoblks (frag3); 924 } 925 926 UFSD("ino %lu, frag1 %llu, frag2 %llu, block1 %llu, block2 %llu," 927 " frag3 %llu, frag4 %llu\n", inode->i_ino, 928 (unsigned long long)frag1, (unsigned long long)frag2, 929 (unsigned long long)block1, (unsigned long long)block2, 930 (unsigned long long)frag3, (unsigned long long)frag4); 931 932 if (frag1 >= frag2) 933 goto next1; 934 935 /* 936 * Free first free fragments 937 */ 938 p = ufs_get_direct_data_ptr(uspi, ufsi, ufs_fragstoblks(frag1)); 939 tmp = ufs_data_ptr_to_cpu(sb, p); 940 if (!tmp ) 941 ufs_panic (sb, "ufs_trunc_direct", "internal error"); 942 frag2 -= frag1; 943 frag1 = ufs_fragnum (frag1); 944 945 ufs_free_fragments(inode, tmp + frag1, frag2); 946 947 next1: 948 /* 949 * Free whole blocks 950 */ 951 for (i = block1 ; i < block2; i++) { 952 p = ufs_get_direct_data_ptr(uspi, ufsi, i); 953 tmp = ufs_data_ptr_to_cpu(sb, p); 954 if (!tmp) 955 continue; 956 write_seqlock(&ufsi->meta_lock); 957 ufs_data_ptr_clear(uspi, p); 958 write_sequnlock(&ufsi->meta_lock); 959 960 free_data(&ctx, tmp, uspi->s_fpb); 961 } 962 963 free_data(&ctx, 0, 0); 964 965 if (frag3 >= frag4) 966 goto next3; 967 968 /* 969 * Free last free fragments 970 */ 971 p = ufs_get_direct_data_ptr(uspi, ufsi, ufs_fragstoblks(frag3)); 972 tmp = ufs_data_ptr_to_cpu(sb, p); 973 if (!tmp ) 974 ufs_panic(sb, "ufs_truncate_direct", "internal error"); 975 frag4 = ufs_fragnum (frag4); 976 write_seqlock(&ufsi->meta_lock); 977 ufs_data_ptr_clear(uspi, p); 978 write_sequnlock(&ufsi->meta_lock); 979 980 ufs_free_fragments (inode, tmp, frag4); 981 next3: 982 983 UFSD("EXIT: ino %lu\n", inode->i_ino); 984 } 985 986 static void free_full_branch(struct inode *inode, u64 ind_block, int depth) 987 { 988 struct super_block *sb = inode->i_sb; 989 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 990 struct ufs_buffer_head *ubh = ubh_bread(sb, ind_block, uspi->s_bsize); 991 unsigned i; 992 993 if (!ubh) 994 return; 995 996 if (--depth) { 997 for (i = 0; i < uspi->s_apb; i++) { 998 void *p = ubh_get_data_ptr(uspi, ubh, i); 999 u64 block = ufs_data_ptr_to_cpu(sb, p); 1000 if (block) 1001 free_full_branch(inode, block, depth); 1002 } 1003 } else { 1004 struct to_free ctx = {.inode = inode}; 1005 1006 for (i = 0; i < uspi->s_apb; i++) { 1007 void *p = ubh_get_data_ptr(uspi, ubh, i); 1008 u64 block = ufs_data_ptr_to_cpu(sb, p); 1009 if (block) 1010 free_data(&ctx, block, uspi->s_fpb); 1011 } 1012 free_data(&ctx, 0, 0); 1013 } 1014 1015 ubh_bforget(ubh); 1016 ufs_free_blocks(inode, ind_block, uspi->s_fpb); 1017 } 1018 1019 static void free_branch_tail(struct inode *inode, unsigned from, struct ufs_buffer_head *ubh, int depth) 1020 { 1021 struct super_block *sb = inode->i_sb; 1022 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 1023 unsigned i; 1024 1025 if (--depth) { 1026 for (i = from; i < uspi->s_apb ; i++) { 1027 void *p = ubh_get_data_ptr(uspi, ubh, i); 1028 u64 block = ufs_data_ptr_to_cpu(sb, p); 1029 if (block) { 1030 write_seqlock(&UFS_I(inode)->meta_lock); 1031 ufs_data_ptr_clear(uspi, p); 1032 write_sequnlock(&UFS_I(inode)->meta_lock); 1033 ubh_mark_buffer_dirty(ubh); 1034 free_full_branch(inode, block, depth); 1035 } 1036 } 1037 } else { 1038 struct to_free ctx = {.inode = inode}; 1039 1040 for (i = from; i < uspi->s_apb; i++) { 1041 void *p = ubh_get_data_ptr(uspi, ubh, i); 1042 u64 block = ufs_data_ptr_to_cpu(sb, p); 1043 if (block) { 1044 write_seqlock(&UFS_I(inode)->meta_lock); 1045 ufs_data_ptr_clear(uspi, p); 1046 write_sequnlock(&UFS_I(inode)->meta_lock); 1047 ubh_mark_buffer_dirty(ubh); 1048 free_data(&ctx, block, uspi->s_fpb); 1049 } 1050 } 1051 free_data(&ctx, 0, 0); 1052 } 1053 if (IS_SYNC(inode) && ubh_buffer_dirty(ubh)) 1054 ubh_sync_block(ubh); 1055 ubh_brelse(ubh); 1056 } 1057 1058 static int ufs_alloc_lastblock(struct inode *inode, loff_t size) 1059 { 1060 int err = 0; 1061 struct super_block *sb = inode->i_sb; 1062 struct address_space *mapping = inode->i_mapping; 1063 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 1064 unsigned i, end; 1065 sector_t lastfrag; 1066 struct page *lastpage; 1067 struct buffer_head *bh; 1068 u64 phys64; 1069 1070 lastfrag = (size + uspi->s_fsize - 1) >> uspi->s_fshift; 1071 1072 if (!lastfrag) 1073 goto out; 1074 1075 lastfrag--; 1076 1077 lastpage = ufs_get_locked_page(mapping, lastfrag >> 1078 (PAGE_CACHE_SHIFT - inode->i_blkbits)); 1079 if (IS_ERR(lastpage)) { 1080 err = -EIO; 1081 goto out; 1082 } 1083 1084 end = lastfrag & ((1 << (PAGE_CACHE_SHIFT - inode->i_blkbits)) - 1); 1085 bh = page_buffers(lastpage); 1086 for (i = 0; i < end; ++i) 1087 bh = bh->b_this_page; 1088 1089 1090 err = ufs_getfrag_block(inode, lastfrag, bh, 1); 1091 1092 if (unlikely(err)) 1093 goto out_unlock; 1094 1095 if (buffer_new(bh)) { 1096 clear_buffer_new(bh); 1097 unmap_underlying_metadata(bh->b_bdev, 1098 bh->b_blocknr); 1099 /* 1100 * we do not zeroize fragment, because of 1101 * if it maped to hole, it already contains zeroes 1102 */ 1103 set_buffer_uptodate(bh); 1104 mark_buffer_dirty(bh); 1105 set_page_dirty(lastpage); 1106 } 1107 1108 if (lastfrag >= UFS_IND_FRAGMENT) { 1109 end = uspi->s_fpb - ufs_fragnum(lastfrag) - 1; 1110 phys64 = bh->b_blocknr + 1; 1111 for (i = 0; i < end; ++i) { 1112 bh = sb_getblk(sb, i + phys64); 1113 lock_buffer(bh); 1114 memset(bh->b_data, 0, sb->s_blocksize); 1115 set_buffer_uptodate(bh); 1116 mark_buffer_dirty(bh); 1117 unlock_buffer(bh); 1118 sync_dirty_buffer(bh); 1119 brelse(bh); 1120 } 1121 } 1122 out_unlock: 1123 ufs_put_locked_page(lastpage); 1124 out: 1125 return err; 1126 } 1127 1128 static void __ufs_truncate_blocks(struct inode *inode) 1129 { 1130 struct ufs_inode_info *ufsi = UFS_I(inode); 1131 struct super_block *sb = inode->i_sb; 1132 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 1133 unsigned offsets[4]; 1134 int depth = ufs_block_to_path(inode, DIRECT_BLOCK, offsets); 1135 int depth2; 1136 unsigned i; 1137 struct ufs_buffer_head *ubh[3]; 1138 void *p; 1139 u64 block; 1140 1141 if (!depth) 1142 return; 1143 1144 /* find the last non-zero in offsets[] */ 1145 for (depth2 = depth - 1; depth2; depth2--) 1146 if (offsets[depth2]) 1147 break; 1148 1149 mutex_lock(&ufsi->truncate_mutex); 1150 if (depth == 1) { 1151 ufs_trunc_direct(inode); 1152 offsets[0] = UFS_IND_BLOCK; 1153 } else { 1154 /* get the blocks that should be partially emptied */ 1155 p = ufs_get_direct_data_ptr(uspi, ufsi, offsets[0]); 1156 for (i = 0; i < depth2; i++) { 1157 offsets[i]++; /* next branch is fully freed */ 1158 block = ufs_data_ptr_to_cpu(sb, p); 1159 if (!block) 1160 break; 1161 ubh[i] = ubh_bread(sb, block, uspi->s_bsize); 1162 if (!ubh[i]) { 1163 write_seqlock(&ufsi->meta_lock); 1164 ufs_data_ptr_clear(uspi, p); 1165 write_sequnlock(&ufsi->meta_lock); 1166 break; 1167 } 1168 p = ubh_get_data_ptr(uspi, ubh[i], offsets[i + 1]); 1169 } 1170 while (i--) 1171 free_branch_tail(inode, offsets[i + 1], ubh[i], depth - i - 1); 1172 } 1173 for (i = offsets[0]; i <= UFS_TIND_BLOCK; i++) { 1174 p = ufs_get_direct_data_ptr(uspi, ufsi, i); 1175 block = ufs_data_ptr_to_cpu(sb, p); 1176 if (block) { 1177 write_seqlock(&ufsi->meta_lock); 1178 ufs_data_ptr_clear(uspi, p); 1179 write_sequnlock(&ufsi->meta_lock); 1180 free_full_branch(inode, block, i - UFS_IND_BLOCK + 1); 1181 } 1182 } 1183 ufsi->i_lastfrag = DIRECT_FRAGMENT; 1184 mark_inode_dirty(inode); 1185 mutex_unlock(&ufsi->truncate_mutex); 1186 } 1187 1188 static int ufs_truncate(struct inode *inode, loff_t size) 1189 { 1190 int err = 0; 1191 1192 UFSD("ENTER: ino %lu, i_size: %llu, old_i_size: %llu\n", 1193 inode->i_ino, (unsigned long long)size, 1194 (unsigned long long)i_size_read(inode)); 1195 1196 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || 1197 S_ISLNK(inode->i_mode))) 1198 return -EINVAL; 1199 if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) 1200 return -EPERM; 1201 1202 err = ufs_alloc_lastblock(inode, size); 1203 1204 if (err) 1205 goto out; 1206 1207 block_truncate_page(inode->i_mapping, size, ufs_getfrag_block); 1208 1209 truncate_setsize(inode, size); 1210 1211 __ufs_truncate_blocks(inode); 1212 inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC; 1213 mark_inode_dirty(inode); 1214 out: 1215 UFSD("EXIT: err %d\n", err); 1216 return err; 1217 } 1218 1219 void ufs_truncate_blocks(struct inode *inode) 1220 { 1221 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || 1222 S_ISLNK(inode->i_mode))) 1223 return; 1224 if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) 1225 return; 1226 __ufs_truncate_blocks(inode); 1227 } 1228 1229 int ufs_setattr(struct dentry *dentry, struct iattr *attr) 1230 { 1231 struct inode *inode = d_inode(dentry); 1232 unsigned int ia_valid = attr->ia_valid; 1233 int error; 1234 1235 error = inode_change_ok(inode, attr); 1236 if (error) 1237 return error; 1238 1239 if (ia_valid & ATTR_SIZE && attr->ia_size != inode->i_size) { 1240 error = ufs_truncate(inode, attr->ia_size); 1241 if (error) 1242 return error; 1243 } 1244 1245 setattr_copy(inode, attr); 1246 mark_inode_dirty(inode); 1247 return 0; 1248 } 1249 1250 const struct inode_operations ufs_file_inode_operations = { 1251 .setattr = ufs_setattr, 1252 }; 1253