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