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 return 0; 354 355 index &= uspi->s_apbmask >> uspi->s_fpbshift; 356 if (uspi->fs_magic == UFS2_MAGIC) 357 p = (__fs64 *)bh->b_data + index; 358 else 359 p = (__fs32 *)bh->b_data + index; 360 361 tmp = ufs_data_ptr_to_cpu(sb, p); 362 if (tmp) 363 goto out; 364 365 if (index && (uspi->fs_magic == UFS2_MAGIC ? 366 (tmp = fs64_to_cpu(sb, ((__fs64 *)bh->b_data)[index-1])) : 367 (tmp = fs32_to_cpu(sb, ((__fs32 *)bh->b_data)[index-1])))) 368 goal = tmp + uspi->s_fpb; 369 else 370 goal = bh->b_blocknr + uspi->s_fpb; 371 tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), goal, 372 uspi->s_fpb, err, locked_page); 373 if (!tmp) 374 goto out; 375 376 if (new) 377 *new = 1; 378 379 mark_buffer_dirty(bh); 380 if (IS_SYNC(inode)) 381 sync_dirty_buffer(bh); 382 inode->i_ctime = CURRENT_TIME_SEC; 383 mark_inode_dirty(inode); 384 out: 385 brelse (bh); 386 UFSD("EXIT\n"); 387 if (tmp) 388 tmp += uspi->s_sbbase; 389 return tmp; 390 } 391 392 /** 393 * ufs_getfrag_block() - `get_block_t' function, interface between UFS and 394 * readpage, writepage and so on 395 */ 396 397 static int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create) 398 { 399 struct super_block * sb = inode->i_sb; 400 struct ufs_sb_info * sbi = UFS_SB(sb); 401 struct ufs_sb_private_info * uspi = sbi->s_uspi; 402 struct buffer_head * bh; 403 int ret, err, new; 404 unsigned offsets[4]; 405 int depth = ufs_block_to_path(inode, fragment >> uspi->s_fpbshift, offsets); 406 unsigned long phys; 407 u64 phys64 = 0; 408 unsigned frag = fragment & uspi->s_fpbmask; 409 410 if (!create) { 411 phys64 = ufs_frag_map(inode, offsets, depth); 412 if (phys64) { 413 phys64 += frag; 414 map_bh(bh_result, sb, phys64); 415 } 416 return 0; 417 } 418 419 /* This code entered only while writing ....? */ 420 421 err = -EIO; 422 new = 0; 423 ret = 0; 424 bh = NULL; 425 426 mutex_lock(&UFS_I(inode)->truncate_mutex); 427 428 UFSD("ENTER, ino %lu, fragment %llu\n", inode->i_ino, (unsigned long long)fragment); 429 if (!depth) 430 goto abort_too_big; 431 432 err = 0; 433 434 if (UFS_I(inode)->i_lastfrag < UFS_NDIR_FRAGMENT) { 435 unsigned lastfrag = UFS_I(inode)->i_lastfrag; 436 unsigned tailfrags = lastfrag & uspi->s_fpbmask; 437 if (tailfrags && fragment >= lastfrag) { 438 if (!ufs_extend_tail(inode, fragment, 439 &err, bh_result->b_page)) 440 goto abort; 441 } 442 } 443 444 if (depth == 1) { 445 phys64 = ufs_inode_getfrag(inode, offsets[0], fragment, 446 &err, &phys, &new, bh_result->b_page); 447 if (phys64) { 448 phys64 += frag; 449 phys = phys64; 450 } 451 goto out; 452 } 453 if (depth == 2) { 454 phys64 = ufs_inode_getfrag(inode, offsets[0], fragment, 455 &err, NULL, NULL, bh_result->b_page); 456 goto get_indirect; 457 } 458 if (depth == 3) { 459 phys64 = ufs_inode_getfrag(inode, offsets[0], fragment, 460 &err, NULL, NULL, bh_result->b_page); 461 goto get_double; 462 } 463 phys64 = ufs_inode_getfrag(inode, offsets[0], fragment, 464 &err, NULL, NULL, bh_result->b_page); 465 phys64 = ufs_inode_getblock(inode, phys64, offsets[1], 466 fragment, &err, NULL, NULL, NULL); 467 get_double: 468 phys64 = ufs_inode_getblock(inode, phys64, offsets[depth - 2], 469 fragment, &err, NULL, NULL, NULL); 470 get_indirect: 471 phys64 = ufs_inode_getblock(inode, phys64, offsets[depth - 1], 472 fragment, &err, &phys, &new, bh_result->b_page); 473 if (phys64) { 474 phys64 += frag; 475 phys = phys64; 476 } 477 out: 478 if (err) 479 goto abort; 480 if (new) 481 set_buffer_new(bh_result); 482 map_bh(bh_result, sb, phys); 483 abort: 484 mutex_unlock(&UFS_I(inode)->truncate_mutex); 485 486 return err; 487 488 abort_too_big: 489 ufs_warning(sb, "ufs_get_block", "block > big"); 490 goto abort; 491 } 492 493 static int ufs_writepage(struct page *page, struct writeback_control *wbc) 494 { 495 return block_write_full_page(page,ufs_getfrag_block,wbc); 496 } 497 498 static int ufs_readpage(struct file *file, struct page *page) 499 { 500 return block_read_full_page(page,ufs_getfrag_block); 501 } 502 503 int ufs_prepare_chunk(struct page *page, loff_t pos, unsigned len) 504 { 505 return __block_write_begin(page, pos, len, ufs_getfrag_block); 506 } 507 508 static void ufs_truncate_blocks(struct inode *); 509 510 static void ufs_write_failed(struct address_space *mapping, loff_t to) 511 { 512 struct inode *inode = mapping->host; 513 514 if (to > inode->i_size) { 515 truncate_pagecache(inode, inode->i_size); 516 ufs_truncate_blocks(inode); 517 } 518 } 519 520 static int ufs_write_begin(struct file *file, struct address_space *mapping, 521 loff_t pos, unsigned len, unsigned flags, 522 struct page **pagep, void **fsdata) 523 { 524 int ret; 525 526 ret = block_write_begin(mapping, pos, len, flags, pagep, 527 ufs_getfrag_block); 528 if (unlikely(ret)) 529 ufs_write_failed(mapping, pos + len); 530 531 return ret; 532 } 533 534 static int ufs_write_end(struct file *file, struct address_space *mapping, 535 loff_t pos, unsigned len, unsigned copied, 536 struct page *page, void *fsdata) 537 { 538 int ret; 539 540 ret = generic_write_end(file, mapping, pos, len, copied, page, fsdata); 541 if (ret < len) 542 ufs_write_failed(mapping, pos + len); 543 return ret; 544 } 545 546 static sector_t ufs_bmap(struct address_space *mapping, sector_t block) 547 { 548 return generic_block_bmap(mapping,block,ufs_getfrag_block); 549 } 550 551 const struct address_space_operations ufs_aops = { 552 .readpage = ufs_readpage, 553 .writepage = ufs_writepage, 554 .write_begin = ufs_write_begin, 555 .write_end = ufs_write_end, 556 .bmap = ufs_bmap 557 }; 558 559 static void ufs_set_inode_ops(struct inode *inode) 560 { 561 if (S_ISREG(inode->i_mode)) { 562 inode->i_op = &ufs_file_inode_operations; 563 inode->i_fop = &ufs_file_operations; 564 inode->i_mapping->a_ops = &ufs_aops; 565 } else if (S_ISDIR(inode->i_mode)) { 566 inode->i_op = &ufs_dir_inode_operations; 567 inode->i_fop = &ufs_dir_operations; 568 inode->i_mapping->a_ops = &ufs_aops; 569 } else if (S_ISLNK(inode->i_mode)) { 570 if (!inode->i_blocks) { 571 inode->i_op = &ufs_fast_symlink_inode_operations; 572 inode->i_link = (char *)UFS_I(inode)->i_u1.i_symlink; 573 } else { 574 inode->i_op = &ufs_symlink_inode_operations; 575 inode->i_mapping->a_ops = &ufs_aops; 576 } 577 } else 578 init_special_inode(inode, inode->i_mode, 579 ufs_get_inode_dev(inode->i_sb, UFS_I(inode))); 580 } 581 582 static int ufs1_read_inode(struct inode *inode, struct ufs_inode *ufs_inode) 583 { 584 struct ufs_inode_info *ufsi = UFS_I(inode); 585 struct super_block *sb = inode->i_sb; 586 umode_t mode; 587 588 /* 589 * Copy data to the in-core inode. 590 */ 591 inode->i_mode = mode = fs16_to_cpu(sb, ufs_inode->ui_mode); 592 set_nlink(inode, fs16_to_cpu(sb, ufs_inode->ui_nlink)); 593 if (inode->i_nlink == 0) { 594 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino); 595 return -1; 596 } 597 598 /* 599 * Linux now has 32-bit uid and gid, so we can support EFT. 600 */ 601 i_uid_write(inode, ufs_get_inode_uid(sb, ufs_inode)); 602 i_gid_write(inode, ufs_get_inode_gid(sb, ufs_inode)); 603 604 inode->i_size = fs64_to_cpu(sb, ufs_inode->ui_size); 605 inode->i_atime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_atime.tv_sec); 606 inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_ctime.tv_sec); 607 inode->i_mtime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_mtime.tv_sec); 608 inode->i_mtime.tv_nsec = 0; 609 inode->i_atime.tv_nsec = 0; 610 inode->i_ctime.tv_nsec = 0; 611 inode->i_blocks = fs32_to_cpu(sb, ufs_inode->ui_blocks); 612 inode->i_generation = fs32_to_cpu(sb, ufs_inode->ui_gen); 613 ufsi->i_flags = fs32_to_cpu(sb, ufs_inode->ui_flags); 614 ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); 615 ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); 616 617 618 if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { 619 memcpy(ufsi->i_u1.i_data, &ufs_inode->ui_u2.ui_addr, 620 sizeof(ufs_inode->ui_u2.ui_addr)); 621 } else { 622 memcpy(ufsi->i_u1.i_symlink, ufs_inode->ui_u2.ui_symlink, 623 sizeof(ufs_inode->ui_u2.ui_symlink) - 1); 624 ufsi->i_u1.i_symlink[sizeof(ufs_inode->ui_u2.ui_symlink) - 1] = 0; 625 } 626 return 0; 627 } 628 629 static int ufs2_read_inode(struct inode *inode, struct ufs2_inode *ufs2_inode) 630 { 631 struct ufs_inode_info *ufsi = UFS_I(inode); 632 struct super_block *sb = inode->i_sb; 633 umode_t mode; 634 635 UFSD("Reading ufs2 inode, ino %lu\n", inode->i_ino); 636 /* 637 * Copy data to the in-core inode. 638 */ 639 inode->i_mode = mode = fs16_to_cpu(sb, ufs2_inode->ui_mode); 640 set_nlink(inode, fs16_to_cpu(sb, ufs2_inode->ui_nlink)); 641 if (inode->i_nlink == 0) { 642 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino); 643 return -1; 644 } 645 646 /* 647 * Linux now has 32-bit uid and gid, so we can support EFT. 648 */ 649 i_uid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_uid)); 650 i_gid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_gid)); 651 652 inode->i_size = fs64_to_cpu(sb, ufs2_inode->ui_size); 653 inode->i_atime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_atime); 654 inode->i_ctime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_ctime); 655 inode->i_mtime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_mtime); 656 inode->i_atime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_atimensec); 657 inode->i_ctime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_ctimensec); 658 inode->i_mtime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_mtimensec); 659 inode->i_blocks = fs64_to_cpu(sb, ufs2_inode->ui_blocks); 660 inode->i_generation = fs32_to_cpu(sb, ufs2_inode->ui_gen); 661 ufsi->i_flags = fs32_to_cpu(sb, ufs2_inode->ui_flags); 662 /* 663 ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); 664 ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); 665 */ 666 667 if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { 668 memcpy(ufsi->i_u1.u2_i_data, &ufs2_inode->ui_u2.ui_addr, 669 sizeof(ufs2_inode->ui_u2.ui_addr)); 670 } else { 671 memcpy(ufsi->i_u1.i_symlink, ufs2_inode->ui_u2.ui_symlink, 672 sizeof(ufs2_inode->ui_u2.ui_symlink) - 1); 673 ufsi->i_u1.i_symlink[sizeof(ufs2_inode->ui_u2.ui_symlink) - 1] = 0; 674 } 675 return 0; 676 } 677 678 struct inode *ufs_iget(struct super_block *sb, unsigned long ino) 679 { 680 struct ufs_inode_info *ufsi; 681 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 682 struct buffer_head * bh; 683 struct inode *inode; 684 int err; 685 686 UFSD("ENTER, ino %lu\n", ino); 687 688 if (ino < UFS_ROOTINO || ino > (uspi->s_ncg * uspi->s_ipg)) { 689 ufs_warning(sb, "ufs_read_inode", "bad inode number (%lu)\n", 690 ino); 691 return ERR_PTR(-EIO); 692 } 693 694 inode = iget_locked(sb, ino); 695 if (!inode) 696 return ERR_PTR(-ENOMEM); 697 if (!(inode->i_state & I_NEW)) 698 return inode; 699 700 ufsi = UFS_I(inode); 701 702 bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino)); 703 if (!bh) { 704 ufs_warning(sb, "ufs_read_inode", "unable to read inode %lu\n", 705 inode->i_ino); 706 goto bad_inode; 707 } 708 if ((UFS_SB(sb)->s_flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { 709 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data; 710 711 err = ufs2_read_inode(inode, 712 ufs2_inode + ufs_inotofsbo(inode->i_ino)); 713 } else { 714 struct ufs_inode *ufs_inode = (struct ufs_inode *)bh->b_data; 715 716 err = ufs1_read_inode(inode, 717 ufs_inode + ufs_inotofsbo(inode->i_ino)); 718 } 719 720 if (err) 721 goto bad_inode; 722 inode->i_version++; 723 ufsi->i_lastfrag = 724 (inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift; 725 ufsi->i_dir_start_lookup = 0; 726 ufsi->i_osync = 0; 727 728 ufs_set_inode_ops(inode); 729 730 brelse(bh); 731 732 UFSD("EXIT\n"); 733 unlock_new_inode(inode); 734 return inode; 735 736 bad_inode: 737 iget_failed(inode); 738 return ERR_PTR(-EIO); 739 } 740 741 static void ufs1_update_inode(struct inode *inode, struct ufs_inode *ufs_inode) 742 { 743 struct super_block *sb = inode->i_sb; 744 struct ufs_inode_info *ufsi = UFS_I(inode); 745 746 ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode); 747 ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink); 748 749 ufs_set_inode_uid(sb, ufs_inode, i_uid_read(inode)); 750 ufs_set_inode_gid(sb, ufs_inode, i_gid_read(inode)); 751 752 ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size); 753 ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb, inode->i_atime.tv_sec); 754 ufs_inode->ui_atime.tv_usec = 0; 755 ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb, inode->i_ctime.tv_sec); 756 ufs_inode->ui_ctime.tv_usec = 0; 757 ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb, inode->i_mtime.tv_sec); 758 ufs_inode->ui_mtime.tv_usec = 0; 759 ufs_inode->ui_blocks = cpu_to_fs32(sb, inode->i_blocks); 760 ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags); 761 ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation); 762 763 if ((UFS_SB(sb)->s_flags & UFS_UID_MASK) == UFS_UID_EFT) { 764 ufs_inode->ui_u3.ui_sun.ui_shadow = cpu_to_fs32(sb, ufsi->i_shadow); 765 ufs_inode->ui_u3.ui_sun.ui_oeftflag = cpu_to_fs32(sb, ufsi->i_oeftflag); 766 } 767 768 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { 769 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */ 770 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.i_data[0]; 771 } else if (inode->i_blocks) { 772 memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.i_data, 773 sizeof(ufs_inode->ui_u2.ui_addr)); 774 } 775 else { 776 memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink, 777 sizeof(ufs_inode->ui_u2.ui_symlink)); 778 } 779 780 if (!inode->i_nlink) 781 memset (ufs_inode, 0, sizeof(struct ufs_inode)); 782 } 783 784 static void ufs2_update_inode(struct inode *inode, struct ufs2_inode *ufs_inode) 785 { 786 struct super_block *sb = inode->i_sb; 787 struct ufs_inode_info *ufsi = UFS_I(inode); 788 789 UFSD("ENTER\n"); 790 ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode); 791 ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink); 792 793 ufs_inode->ui_uid = cpu_to_fs32(sb, i_uid_read(inode)); 794 ufs_inode->ui_gid = cpu_to_fs32(sb, i_gid_read(inode)); 795 796 ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size); 797 ufs_inode->ui_atime = cpu_to_fs64(sb, inode->i_atime.tv_sec); 798 ufs_inode->ui_atimensec = cpu_to_fs32(sb, inode->i_atime.tv_nsec); 799 ufs_inode->ui_ctime = cpu_to_fs64(sb, inode->i_ctime.tv_sec); 800 ufs_inode->ui_ctimensec = cpu_to_fs32(sb, inode->i_ctime.tv_nsec); 801 ufs_inode->ui_mtime = cpu_to_fs64(sb, inode->i_mtime.tv_sec); 802 ufs_inode->ui_mtimensec = cpu_to_fs32(sb, inode->i_mtime.tv_nsec); 803 804 ufs_inode->ui_blocks = cpu_to_fs64(sb, inode->i_blocks); 805 ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags); 806 ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation); 807 808 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { 809 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */ 810 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.u2_i_data[0]; 811 } else if (inode->i_blocks) { 812 memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.u2_i_data, 813 sizeof(ufs_inode->ui_u2.ui_addr)); 814 } else { 815 memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink, 816 sizeof(ufs_inode->ui_u2.ui_symlink)); 817 } 818 819 if (!inode->i_nlink) 820 memset (ufs_inode, 0, sizeof(struct ufs2_inode)); 821 UFSD("EXIT\n"); 822 } 823 824 static int ufs_update_inode(struct inode * inode, int do_sync) 825 { 826 struct super_block *sb = inode->i_sb; 827 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 828 struct buffer_head * bh; 829 830 UFSD("ENTER, ino %lu\n", inode->i_ino); 831 832 if (inode->i_ino < UFS_ROOTINO || 833 inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) { 834 ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino); 835 return -1; 836 } 837 838 bh = sb_bread(sb, ufs_inotofsba(inode->i_ino)); 839 if (!bh) { 840 ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino); 841 return -1; 842 } 843 if (uspi->fs_magic == UFS2_MAGIC) { 844 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data; 845 846 ufs2_update_inode(inode, 847 ufs2_inode + ufs_inotofsbo(inode->i_ino)); 848 } else { 849 struct ufs_inode *ufs_inode = (struct ufs_inode *) bh->b_data; 850 851 ufs1_update_inode(inode, ufs_inode + ufs_inotofsbo(inode->i_ino)); 852 } 853 854 mark_buffer_dirty(bh); 855 if (do_sync) 856 sync_dirty_buffer(bh); 857 brelse (bh); 858 859 UFSD("EXIT\n"); 860 return 0; 861 } 862 863 int ufs_write_inode(struct inode *inode, struct writeback_control *wbc) 864 { 865 return ufs_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL); 866 } 867 868 int ufs_sync_inode (struct inode *inode) 869 { 870 return ufs_update_inode (inode, 1); 871 } 872 873 void ufs_evict_inode(struct inode * inode) 874 { 875 int want_delete = 0; 876 877 if (!inode->i_nlink && !is_bad_inode(inode)) 878 want_delete = 1; 879 880 truncate_inode_pages_final(&inode->i_data); 881 if (want_delete) { 882 inode->i_size = 0; 883 if (inode->i_blocks) 884 ufs_truncate_blocks(inode); 885 } 886 887 invalidate_inode_buffers(inode); 888 clear_inode(inode); 889 890 if (want_delete) 891 ufs_free_inode(inode); 892 } 893 894 struct to_free { 895 struct inode *inode; 896 u64 to; 897 unsigned count; 898 }; 899 900 static inline void free_data(struct to_free *ctx, u64 from, unsigned count) 901 { 902 if (ctx->count && ctx->to != from) { 903 ufs_free_blocks(ctx->inode, ctx->to - ctx->count, ctx->count); 904 ctx->count = 0; 905 } 906 ctx->count += count; 907 ctx->to = from + count; 908 } 909 910 #define DIRECT_BLOCK ((inode->i_size + uspi->s_bsize - 1) >> uspi->s_bshift) 911 #define DIRECT_FRAGMENT ((inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift) 912 913 static void ufs_trunc_direct(struct inode *inode) 914 { 915 struct ufs_inode_info *ufsi = UFS_I(inode); 916 struct super_block * sb; 917 struct ufs_sb_private_info * uspi; 918 void *p; 919 u64 frag1, frag2, frag3, frag4, block1, block2; 920 struct to_free ctx = {.inode = inode}; 921 unsigned i, tmp; 922 923 UFSD("ENTER: ino %lu\n", inode->i_ino); 924 925 sb = inode->i_sb; 926 uspi = UFS_SB(sb)->s_uspi; 927 928 frag1 = DIRECT_FRAGMENT; 929 frag4 = min_t(u64, UFS_NDIR_FRAGMENT, ufsi->i_lastfrag); 930 frag2 = ((frag1 & uspi->s_fpbmask) ? ((frag1 | uspi->s_fpbmask) + 1) : frag1); 931 frag3 = frag4 & ~uspi->s_fpbmask; 932 block1 = block2 = 0; 933 if (frag2 > frag3) { 934 frag2 = frag4; 935 frag3 = frag4 = 0; 936 } else if (frag2 < frag3) { 937 block1 = ufs_fragstoblks (frag2); 938 block2 = ufs_fragstoblks (frag3); 939 } 940 941 UFSD("ino %lu, frag1 %llu, frag2 %llu, block1 %llu, block2 %llu," 942 " frag3 %llu, frag4 %llu\n", inode->i_ino, 943 (unsigned long long)frag1, (unsigned long long)frag2, 944 (unsigned long long)block1, (unsigned long long)block2, 945 (unsigned long long)frag3, (unsigned long long)frag4); 946 947 if (frag1 >= frag2) 948 goto next1; 949 950 /* 951 * Free first free fragments 952 */ 953 p = ufs_get_direct_data_ptr(uspi, ufsi, ufs_fragstoblks(frag1)); 954 tmp = ufs_data_ptr_to_cpu(sb, p); 955 if (!tmp ) 956 ufs_panic (sb, "ufs_trunc_direct", "internal error"); 957 frag2 -= frag1; 958 frag1 = ufs_fragnum (frag1); 959 960 ufs_free_fragments(inode, tmp + frag1, frag2); 961 962 next1: 963 /* 964 * Free whole blocks 965 */ 966 for (i = block1 ; i < block2; i++) { 967 p = ufs_get_direct_data_ptr(uspi, ufsi, i); 968 tmp = ufs_data_ptr_to_cpu(sb, p); 969 if (!tmp) 970 continue; 971 write_seqlock(&ufsi->meta_lock); 972 ufs_data_ptr_clear(uspi, p); 973 write_sequnlock(&ufsi->meta_lock); 974 975 free_data(&ctx, tmp, uspi->s_fpb); 976 } 977 978 free_data(&ctx, 0, 0); 979 980 if (frag3 >= frag4) 981 goto next3; 982 983 /* 984 * Free last free fragments 985 */ 986 p = ufs_get_direct_data_ptr(uspi, ufsi, ufs_fragstoblks(frag3)); 987 tmp = ufs_data_ptr_to_cpu(sb, p); 988 if (!tmp ) 989 ufs_panic(sb, "ufs_truncate_direct", "internal error"); 990 frag4 = ufs_fragnum (frag4); 991 write_seqlock(&ufsi->meta_lock); 992 ufs_data_ptr_clear(uspi, p); 993 write_sequnlock(&ufsi->meta_lock); 994 995 ufs_free_fragments (inode, tmp, frag4); 996 next3: 997 998 UFSD("EXIT: ino %lu\n", inode->i_ino); 999 } 1000 1001 static void free_full_branch(struct inode *inode, u64 ind_block, int depth) 1002 { 1003 struct super_block *sb = inode->i_sb; 1004 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 1005 struct ufs_buffer_head *ubh = ubh_bread(sb, ind_block, uspi->s_bsize); 1006 unsigned i; 1007 1008 if (!ubh) 1009 return; 1010 1011 if (--depth) { 1012 for (i = 0; i < uspi->s_apb; i++) { 1013 void *p = ubh_get_data_ptr(uspi, ubh, i); 1014 u64 block = ufs_data_ptr_to_cpu(sb, p); 1015 if (block) 1016 free_full_branch(inode, block, depth); 1017 } 1018 } else { 1019 struct to_free ctx = {.inode = inode}; 1020 1021 for (i = 0; i < uspi->s_apb; i++) { 1022 void *p = ubh_get_data_ptr(uspi, ubh, i); 1023 u64 block = ufs_data_ptr_to_cpu(sb, p); 1024 if (block) 1025 free_data(&ctx, block, uspi->s_fpb); 1026 } 1027 free_data(&ctx, 0, 0); 1028 } 1029 1030 ubh_bforget(ubh); 1031 ufs_free_blocks(inode, ind_block, uspi->s_fpb); 1032 } 1033 1034 static void free_branch_tail(struct inode *inode, unsigned from, struct ufs_buffer_head *ubh, int depth) 1035 { 1036 struct super_block *sb = inode->i_sb; 1037 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 1038 unsigned i; 1039 1040 if (--depth) { 1041 for (i = from; i < uspi->s_apb ; i++) { 1042 void *p = ubh_get_data_ptr(uspi, ubh, i); 1043 u64 block = ufs_data_ptr_to_cpu(sb, p); 1044 if (block) { 1045 write_seqlock(&UFS_I(inode)->meta_lock); 1046 ufs_data_ptr_clear(uspi, p); 1047 write_sequnlock(&UFS_I(inode)->meta_lock); 1048 ubh_mark_buffer_dirty(ubh); 1049 free_full_branch(inode, block, depth); 1050 } 1051 } 1052 } else { 1053 struct to_free ctx = {.inode = inode}; 1054 1055 for (i = from; i < uspi->s_apb; i++) { 1056 void *p = ubh_get_data_ptr(uspi, ubh, i); 1057 u64 block = ufs_data_ptr_to_cpu(sb, p); 1058 if (block) { 1059 write_seqlock(&UFS_I(inode)->meta_lock); 1060 ufs_data_ptr_clear(uspi, p); 1061 write_sequnlock(&UFS_I(inode)->meta_lock); 1062 ubh_mark_buffer_dirty(ubh); 1063 free_data(&ctx, block, uspi->s_fpb); 1064 } 1065 } 1066 free_data(&ctx, 0, 0); 1067 } 1068 if (IS_SYNC(inode) && ubh_buffer_dirty(ubh)) 1069 ubh_sync_block(ubh); 1070 ubh_brelse(ubh); 1071 } 1072 1073 static int ufs_alloc_lastblock(struct inode *inode, loff_t size) 1074 { 1075 int err = 0; 1076 struct super_block *sb = inode->i_sb; 1077 struct address_space *mapping = inode->i_mapping; 1078 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 1079 unsigned i, end; 1080 sector_t lastfrag; 1081 struct page *lastpage; 1082 struct buffer_head *bh; 1083 u64 phys64; 1084 1085 lastfrag = (size + uspi->s_fsize - 1) >> uspi->s_fshift; 1086 1087 if (!lastfrag) 1088 goto out; 1089 1090 lastfrag--; 1091 1092 lastpage = ufs_get_locked_page(mapping, lastfrag >> 1093 (PAGE_CACHE_SHIFT - inode->i_blkbits)); 1094 if (IS_ERR(lastpage)) { 1095 err = -EIO; 1096 goto out; 1097 } 1098 1099 end = lastfrag & ((1 << (PAGE_CACHE_SHIFT - inode->i_blkbits)) - 1); 1100 bh = page_buffers(lastpage); 1101 for (i = 0; i < end; ++i) 1102 bh = bh->b_this_page; 1103 1104 1105 err = ufs_getfrag_block(inode, lastfrag, bh, 1); 1106 1107 if (unlikely(err)) 1108 goto out_unlock; 1109 1110 if (buffer_new(bh)) { 1111 clear_buffer_new(bh); 1112 unmap_underlying_metadata(bh->b_bdev, 1113 bh->b_blocknr); 1114 /* 1115 * we do not zeroize fragment, because of 1116 * if it maped to hole, it already contains zeroes 1117 */ 1118 set_buffer_uptodate(bh); 1119 mark_buffer_dirty(bh); 1120 set_page_dirty(lastpage); 1121 } 1122 1123 if (lastfrag >= UFS_IND_FRAGMENT) { 1124 end = uspi->s_fpb - ufs_fragnum(lastfrag) - 1; 1125 phys64 = bh->b_blocknr + 1; 1126 for (i = 0; i < end; ++i) { 1127 bh = sb_getblk(sb, i + phys64); 1128 lock_buffer(bh); 1129 memset(bh->b_data, 0, sb->s_blocksize); 1130 set_buffer_uptodate(bh); 1131 mark_buffer_dirty(bh); 1132 unlock_buffer(bh); 1133 sync_dirty_buffer(bh); 1134 brelse(bh); 1135 } 1136 } 1137 out_unlock: 1138 ufs_put_locked_page(lastpage); 1139 out: 1140 return err; 1141 } 1142 1143 static void __ufs_truncate_blocks(struct inode *inode) 1144 { 1145 struct ufs_inode_info *ufsi = UFS_I(inode); 1146 struct super_block *sb = inode->i_sb; 1147 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 1148 unsigned offsets[4]; 1149 int depth = ufs_block_to_path(inode, DIRECT_BLOCK, offsets); 1150 int depth2; 1151 unsigned i; 1152 struct ufs_buffer_head *ubh[3]; 1153 void *p; 1154 u64 block; 1155 1156 if (!depth) 1157 return; 1158 1159 /* find the last non-zero in offsets[] */ 1160 for (depth2 = depth - 1; depth2; depth2--) 1161 if (offsets[depth2]) 1162 break; 1163 1164 mutex_lock(&ufsi->truncate_mutex); 1165 if (depth == 1) { 1166 ufs_trunc_direct(inode); 1167 offsets[0] = UFS_IND_BLOCK; 1168 } else { 1169 /* get the blocks that should be partially emptied */ 1170 p = ufs_get_direct_data_ptr(uspi, ufsi, offsets[0]); 1171 for (i = 0; i < depth2; i++) { 1172 offsets[i]++; /* next branch is fully freed */ 1173 block = ufs_data_ptr_to_cpu(sb, p); 1174 if (!block) 1175 break; 1176 ubh[i] = ubh_bread(sb, block, uspi->s_bsize); 1177 if (!ubh[i]) { 1178 write_seqlock(&ufsi->meta_lock); 1179 ufs_data_ptr_clear(uspi, p); 1180 write_sequnlock(&ufsi->meta_lock); 1181 break; 1182 } 1183 p = ubh_get_data_ptr(uspi, ubh[i], offsets[i + 1]); 1184 } 1185 while (i--) 1186 free_branch_tail(inode, offsets[i + 1], ubh[i], depth - i - 1); 1187 } 1188 for (i = offsets[0]; i <= UFS_TIND_BLOCK; i++) { 1189 p = ufs_get_direct_data_ptr(uspi, ufsi, i); 1190 block = ufs_data_ptr_to_cpu(sb, p); 1191 if (block) { 1192 write_seqlock(&ufsi->meta_lock); 1193 ufs_data_ptr_clear(uspi, p); 1194 write_sequnlock(&ufsi->meta_lock); 1195 free_full_branch(inode, block, i - UFS_IND_BLOCK + 1); 1196 } 1197 } 1198 ufsi->i_lastfrag = DIRECT_FRAGMENT; 1199 mark_inode_dirty(inode); 1200 mutex_unlock(&ufsi->truncate_mutex); 1201 } 1202 1203 static int ufs_truncate(struct inode *inode, loff_t size) 1204 { 1205 int err = 0; 1206 1207 UFSD("ENTER: ino %lu, i_size: %llu, old_i_size: %llu\n", 1208 inode->i_ino, (unsigned long long)size, 1209 (unsigned long long)i_size_read(inode)); 1210 1211 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || 1212 S_ISLNK(inode->i_mode))) 1213 return -EINVAL; 1214 if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) 1215 return -EPERM; 1216 1217 err = ufs_alloc_lastblock(inode, size); 1218 1219 if (err) 1220 goto out; 1221 1222 block_truncate_page(inode->i_mapping, size, ufs_getfrag_block); 1223 1224 truncate_setsize(inode, size); 1225 1226 __ufs_truncate_blocks(inode); 1227 inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC; 1228 mark_inode_dirty(inode); 1229 out: 1230 UFSD("EXIT: err %d\n", err); 1231 return err; 1232 } 1233 1234 void ufs_truncate_blocks(struct inode *inode) 1235 { 1236 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || 1237 S_ISLNK(inode->i_mode))) 1238 return; 1239 if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) 1240 return; 1241 __ufs_truncate_blocks(inode); 1242 } 1243 1244 int ufs_setattr(struct dentry *dentry, struct iattr *attr) 1245 { 1246 struct inode *inode = d_inode(dentry); 1247 unsigned int ia_valid = attr->ia_valid; 1248 int error; 1249 1250 error = inode_change_ok(inode, attr); 1251 if (error) 1252 return error; 1253 1254 if (ia_valid & ATTR_SIZE && attr->ia_size != inode->i_size) { 1255 error = ufs_truncate(inode, attr->ia_size); 1256 if (error) 1257 return error; 1258 } 1259 1260 setattr_copy(inode, attr); 1261 mark_inode_dirty(inode); 1262 return 0; 1263 } 1264 1265 const struct inode_operations ufs_file_inode_operations = { 1266 .setattr = ufs_setattr, 1267 }; 1268