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