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#include <asm/system.h> 30 31#include <linux/errno.h> 32#include <linux/fs.h> 33#include <linux/time.h> 34#include <linux/stat.h> 35#include <linux/string.h> 36#include <linux/mm.h> 37#include <linux/smp_lock.h> 38#include <linux/buffer_head.h> 39#include <linux/writeback.h> 40 41#include "ufs_fs.h" 42#include "ufs.h" 43#include "swab.h" 44#include "util.h" 45 46static u64 ufs_frag_map(struct inode *inode, sector_t frag); 47 48static int ufs_block_to_path(struct inode *inode, sector_t i_block, sector_t offsets[4]) 49{ 50 struct ufs_sb_private_info *uspi = UFS_SB(inode->i_sb)->s_uspi; 51 int ptrs = uspi->s_apb; 52 int ptrs_bits = uspi->s_apbshift; 53 const long direct_blocks = UFS_NDADDR, 54 indirect_blocks = ptrs, 55 double_blocks = (1 << (ptrs_bits * 2)); 56 int n = 0; 57 58 59 UFSD("ptrs=uspi->s_apb = %d,double_blocks=%ld \n",ptrs,double_blocks); 60 if (i_block < direct_blocks) { 61 offsets[n++] = i_block; 62 } else if ((i_block -= direct_blocks) < indirect_blocks) { 63 offsets[n++] = UFS_IND_BLOCK; 64 offsets[n++] = i_block; 65 } else if ((i_block -= indirect_blocks) < double_blocks) { 66 offsets[n++] = UFS_DIND_BLOCK; 67 offsets[n++] = i_block >> ptrs_bits; 68 offsets[n++] = i_block & (ptrs - 1); 69 } else if (((i_block -= double_blocks) >> (ptrs_bits * 2)) < ptrs) { 70 offsets[n++] = UFS_TIND_BLOCK; 71 offsets[n++] = i_block >> (ptrs_bits * 2); 72 offsets[n++] = (i_block >> ptrs_bits) & (ptrs - 1); 73 offsets[n++] = i_block & (ptrs - 1); 74 } else { 75 ufs_warning(inode->i_sb, "ufs_block_to_path", "block > big"); 76 } 77 return n; 78} 79 80/* 81 * Returns the location of the fragment from 82 * the begining of the filesystem. 83 */ 84 85static u64 ufs_frag_map(struct inode *inode, sector_t frag) 86{ 87 struct ufs_inode_info *ufsi = UFS_I(inode); 88 struct super_block *sb = inode->i_sb; 89 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 90 u64 mask = (u64) uspi->s_apbmask>>uspi->s_fpbshift; 91 int shift = uspi->s_apbshift-uspi->s_fpbshift; 92 sector_t offsets[4], *p; 93 int depth = ufs_block_to_path(inode, frag >> uspi->s_fpbshift, offsets); 94 u64 ret = 0L; 95 __fs32 block; 96 __fs64 u2_block = 0L; 97 unsigned flags = UFS_SB(sb)->s_flags; 98 u64 temp = 0L; 99 100 UFSD(": frag = %llu depth = %d\n", (unsigned long long)frag, depth); 101 UFSD(": uspi->s_fpbshift = %d ,uspi->s_apbmask = %x, mask=%llx\n", 102 uspi->s_fpbshift, uspi->s_apbmask, 103 (unsigned long long)mask); 104 105 if (depth == 0) 106 return 0; 107 108 p = offsets; 109 110 lock_kernel(); 111 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) 112 goto ufs2; 113 114 block = ufsi->i_u1.i_data[*p++]; 115 if (!block) 116 goto out; 117 while (--depth) { 118 struct buffer_head *bh; 119 sector_t n = *p++; 120 121 bh = sb_bread(sb, uspi->s_sbbase + fs32_to_cpu(sb, block)+(n>>shift)); 122 if (!bh) 123 goto out; 124 block = ((__fs32 *) bh->b_data)[n & mask]; 125 brelse (bh); 126 if (!block) 127 goto out; 128 } 129 ret = (u64) (uspi->s_sbbase + fs32_to_cpu(sb, block) + (frag & uspi->s_fpbmask)); 130 goto out; 131ufs2: 132 u2_block = ufsi->i_u1.u2_i_data[*p++]; 133 if (!u2_block) 134 goto out; 135 136 137 while (--depth) { 138 struct buffer_head *bh; 139 sector_t n = *p++; 140 141 142 temp = (u64)(uspi->s_sbbase) + fs64_to_cpu(sb, u2_block); 143 bh = sb_bread(sb, temp +(u64) (n>>shift)); 144 if (!bh) 145 goto out; 146 u2_block = ((__fs64 *)bh->b_data)[n & mask]; 147 brelse(bh); 148 if (!u2_block) 149 goto out; 150 } 151 temp = (u64)uspi->s_sbbase + fs64_to_cpu(sb, u2_block); 152 ret = temp + (u64) (frag & uspi->s_fpbmask); 153 154out: 155 unlock_kernel(); 156 return ret; 157} 158 159/** 160 * ufs_inode_getfrag() - allocate new fragment(s) 161 * @inode - pointer to inode 162 * @fragment - number of `fragment' which hold pointer 163 * to new allocated fragment(s) 164 * @new_fragment - number of new allocated fragment(s) 165 * @required - how many fragment(s) we require 166 * @err - we set it if something wrong 167 * @phys - pointer to where we save physical number of new allocated fragments, 168 * NULL if we allocate not data(indirect blocks for example). 169 * @new - we set it if we allocate new block 170 * @locked_page - for ufs_new_fragments() 171 */ 172static struct buffer_head * 173ufs_inode_getfrag(struct inode *inode, u64 fragment, 174 sector_t new_fragment, unsigned int required, int *err, 175 long *phys, int *new, struct page *locked_page) 176{ 177 struct ufs_inode_info *ufsi = UFS_I(inode); 178 struct super_block *sb = inode->i_sb; 179 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 180 struct buffer_head * result; 181 unsigned blockoff, lastblockoff; 182 u64 tmp, goal, lastfrag, block, lastblock; 183 void *p, *p2; 184 185 UFSD("ENTER, ino %lu, fragment %llu, new_fragment %llu, required %u, " 186 "metadata %d\n", inode->i_ino, (unsigned long long)fragment, 187 (unsigned long long)new_fragment, required, !phys); 188 189 /* TODO : to be done for write support 190 if ( (flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) 191 goto ufs2; 192 */ 193 194 block = ufs_fragstoblks (fragment); 195 blockoff = ufs_fragnum (fragment); 196 p = ufs_get_direct_data_ptr(uspi, ufsi, block); 197 198 goal = 0; 199 200repeat: 201 tmp = ufs_data_ptr_to_cpu(sb, p); 202 203 lastfrag = ufsi->i_lastfrag; 204 if (tmp && fragment < lastfrag) { 205 if (!phys) { 206 result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff); 207 if (tmp == ufs_data_ptr_to_cpu(sb, p)) { 208 UFSD("EXIT, result %llu\n", 209 (unsigned long long)tmp + blockoff); 210 return result; 211 } 212 brelse (result); 213 goto repeat; 214 } else { 215 *phys = uspi->s_sbbase + tmp + blockoff; 216 return NULL; 217 } 218 } 219 220 lastblock = ufs_fragstoblks (lastfrag); 221 lastblockoff = ufs_fragnum (lastfrag); 222 /* 223 * We will extend file into new block beyond last allocated block 224 */ 225 if (lastblock < block) { 226 /* 227 * We must reallocate last allocated block 228 */ 229 if (lastblockoff) { 230 p2 = ufs_get_direct_data_ptr(uspi, ufsi, lastblock); 231 tmp = ufs_new_fragments(inode, p2, lastfrag, 232 ufs_data_ptr_to_cpu(sb, p2), 233 uspi->s_fpb - lastblockoff, 234 err, locked_page); 235 if (!tmp) { 236 if (lastfrag != ufsi->i_lastfrag) 237 goto repeat; 238 else 239 return NULL; 240 } 241 lastfrag = ufsi->i_lastfrag; 242 243 } 244 tmp = ufs_data_ptr_to_cpu(sb, 245 ufs_get_direct_data_ptr(uspi, ufsi, 246 lastblock)); 247 if (tmp) 248 goal = tmp + uspi->s_fpb; 249 tmp = ufs_new_fragments (inode, p, fragment - blockoff, 250 goal, required + blockoff, 251 err, 252 phys != NULL ? locked_page : NULL); 253 } else if (lastblock == block) { 254 /* 255 * We will extend last allocated block 256 */ 257 tmp = ufs_new_fragments(inode, p, fragment - 258 (blockoff - lastblockoff), 259 ufs_data_ptr_to_cpu(sb, p), 260 required + (blockoff - lastblockoff), 261 err, phys != NULL ? locked_page : NULL); 262 } else /* (lastblock > block) */ { 263 /* 264 * We will allocate new block before last allocated block 265 */ 266 if (block) { 267 tmp = ufs_data_ptr_to_cpu(sb, 268 ufs_get_direct_data_ptr(uspi, ufsi, block - 1)); 269 if (tmp) 270 goal = tmp + uspi->s_fpb; 271 } 272 tmp = ufs_new_fragments(inode, p, fragment - blockoff, 273 goal, uspi->s_fpb, err, 274 phys != NULL ? locked_page : NULL); 275 } 276 if (!tmp) { 277 if ((!blockoff && ufs_data_ptr_to_cpu(sb, p)) || 278 (blockoff && lastfrag != ufsi->i_lastfrag)) 279 goto repeat; 280 *err = -ENOSPC; 281 return NULL; 282 } 283 284 if (!phys) { 285 result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff); 286 } else { 287 *phys = uspi->s_sbbase + tmp + blockoff; 288 result = NULL; 289 *err = 0; 290 *new = 1; 291 } 292 293 inode->i_ctime = CURRENT_TIME_SEC; 294 if (IS_SYNC(inode)) 295 ufs_sync_inode (inode); 296 mark_inode_dirty(inode); 297 UFSD("EXIT, result %llu\n", (unsigned long long)tmp + blockoff); 298 return result; 299 300 /* This part : To be implemented .... 301 Required only for writing, not required for READ-ONLY. 302ufs2: 303 304 u2_block = ufs_fragstoblks(fragment); 305 u2_blockoff = ufs_fragnum(fragment); 306 p = ufsi->i_u1.u2_i_data + block; 307 goal = 0; 308 309repeat2: 310 tmp = fs32_to_cpu(sb, *p); 311 lastfrag = ufsi->i_lastfrag; 312 313 */ 314} 315 316/** 317 * ufs_inode_getblock() - allocate new block 318 * @inode - pointer to inode 319 * @bh - pointer to block which hold "pointer" to new allocated block 320 * @fragment - number of `fragment' which hold pointer 321 * to new allocated block 322 * @new_fragment - number of new allocated fragment 323 * (block will hold this fragment and also uspi->s_fpb-1) 324 * @err - see ufs_inode_getfrag() 325 * @phys - see ufs_inode_getfrag() 326 * @new - see ufs_inode_getfrag() 327 * @locked_page - see ufs_inode_getfrag() 328 */ 329static struct buffer_head * 330ufs_inode_getblock(struct inode *inode, struct buffer_head *bh, 331 u64 fragment, sector_t new_fragment, int *err, 332 long *phys, int *new, struct page *locked_page) 333{ 334 struct super_block *sb = inode->i_sb; 335 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 336 struct buffer_head * result; 337 unsigned blockoff; 338 u64 tmp, goal, block; 339 void *p; 340 341 block = ufs_fragstoblks (fragment); 342 blockoff = ufs_fragnum (fragment); 343 344 UFSD("ENTER, ino %lu, fragment %llu, new_fragment %llu, metadata %d\n", 345 inode->i_ino, (unsigned long long)fragment, 346 (unsigned long long)new_fragment, !phys); 347 348 result = NULL; 349 if (!bh) 350 goto out; 351 if (!buffer_uptodate(bh)) { 352 ll_rw_block (READ, 1, &bh); 353 wait_on_buffer (bh); 354 if (!buffer_uptodate(bh)) 355 goto out; 356 } 357 if (uspi->fs_magic == UFS2_MAGIC) 358 p = (__fs64 *)bh->b_data + block; 359 else 360 p = (__fs32 *)bh->b_data + block; 361repeat: 362 tmp = ufs_data_ptr_to_cpu(sb, p); 363 if (tmp) { 364 if (!phys) { 365 result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff); 366 if (tmp == ufs_data_ptr_to_cpu(sb, p)) 367 goto out; 368 brelse (result); 369 goto repeat; 370 } else { 371 *phys = uspi->s_sbbase + tmp + blockoff; 372 goto out; 373 } 374 } 375 376 if (block && (uspi->fs_magic == UFS2_MAGIC ? 377 (tmp = fs64_to_cpu(sb, ((__fs64 *)bh->b_data)[block-1])) : 378 (tmp = fs32_to_cpu(sb, ((__fs32 *)bh->b_data)[block-1])))) 379 goal = tmp + uspi->s_fpb; 380 else 381 goal = bh->b_blocknr + uspi->s_fpb; 382 tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), goal, 383 uspi->s_fpb, err, locked_page); 384 if (!tmp) { 385 if (ufs_data_ptr_to_cpu(sb, p)) 386 goto repeat; 387 goto out; 388 } 389 390 391 if (!phys) { 392 result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff); 393 } else { 394 *phys = uspi->s_sbbase + tmp + blockoff; 395 *new = 1; 396 } 397 398 mark_buffer_dirty(bh); 399 if (IS_SYNC(inode)) 400 sync_dirty_buffer(bh); 401 inode->i_ctime = CURRENT_TIME_SEC; 402 mark_inode_dirty(inode); 403 UFSD("result %llu\n", (unsigned long long)tmp + blockoff); 404out: 405 brelse (bh); 406 UFSD("EXIT\n"); 407 return result; 408} 409 410/** 411 * ufs_getfrag_bloc() - `get_block_t' function, interface between UFS and 412 * readpage, writepage and so on 413 */ 414 415int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create) 416{ 417 struct super_block * sb = inode->i_sb; 418 struct ufs_sb_private_info * uspi = UFS_SB(sb)->s_uspi; 419 struct buffer_head * bh; 420 int ret, err, new; 421 unsigned long ptr,phys; 422 u64 phys64 = 0; 423 424 if (!create) { 425 phys64 = ufs_frag_map(inode, fragment); 426 UFSD("phys64 = %llu\n", (unsigned long long)phys64); 427 if (phys64) 428 map_bh(bh_result, sb, phys64); 429 return 0; 430 } 431 432 /* This code entered only while writing ....? */ 433 434 err = -EIO; 435 new = 0; 436 ret = 0; 437 bh = NULL; 438 439 lock_kernel(); 440 441 UFSD("ENTER, ino %lu, fragment %llu\n", inode->i_ino, (unsigned long long)fragment); 442 if (fragment > 443 ((UFS_NDADDR + uspi->s_apb + uspi->s_2apb + uspi->s_3apb) 444 << uspi->s_fpbshift)) 445 goto abort_too_big; 446 447 err = 0; 448 ptr = fragment; 449 450 /* 451 * ok, these macros clean the logic up a bit and make 452 * it much more readable: 453 */ 454#define GET_INODE_DATABLOCK(x) \ 455 ufs_inode_getfrag(inode, x, fragment, 1, &err, &phys, &new,\ 456 bh_result->b_page) 457#define GET_INODE_PTR(x) \ 458 ufs_inode_getfrag(inode, x, fragment, uspi->s_fpb, &err, NULL, NULL,\ 459 bh_result->b_page) 460#define GET_INDIRECT_DATABLOCK(x) \ 461 ufs_inode_getblock(inode, bh, x, fragment, \ 462 &err, &phys, &new, bh_result->b_page) 463#define GET_INDIRECT_PTR(x) \ 464 ufs_inode_getblock(inode, bh, x, fragment, \ 465 &err, NULL, NULL, NULL) 466 467 if (ptr < UFS_NDIR_FRAGMENT) { 468 bh = GET_INODE_DATABLOCK(ptr); 469 goto out; 470 } 471 ptr -= UFS_NDIR_FRAGMENT; 472 if (ptr < (1 << (uspi->s_apbshift + uspi->s_fpbshift))) { 473 bh = GET_INODE_PTR(UFS_IND_FRAGMENT + (ptr >> uspi->s_apbshift)); 474 goto get_indirect; 475 } 476 ptr -= 1 << (uspi->s_apbshift + uspi->s_fpbshift); 477 if (ptr < (1 << (uspi->s_2apbshift + uspi->s_fpbshift))) { 478 bh = GET_INODE_PTR(UFS_DIND_FRAGMENT + (ptr >> uspi->s_2apbshift)); 479 goto get_double; 480 } 481 ptr -= 1 << (uspi->s_2apbshift + uspi->s_fpbshift); 482 bh = GET_INODE_PTR(UFS_TIND_FRAGMENT + (ptr >> uspi->s_3apbshift)); 483 bh = GET_INDIRECT_PTR((ptr >> uspi->s_2apbshift) & uspi->s_apbmask); 484get_double: 485 bh = GET_INDIRECT_PTR((ptr >> uspi->s_apbshift) & uspi->s_apbmask); 486get_indirect: 487 bh = GET_INDIRECT_DATABLOCK(ptr & uspi->s_apbmask); 488 489#undef GET_INODE_DATABLOCK 490#undef GET_INODE_PTR 491#undef GET_INDIRECT_DATABLOCK 492#undef GET_INDIRECT_PTR 493 494out: 495 if (err) 496 goto abort; 497 if (new) 498 set_buffer_new(bh_result); 499 map_bh(bh_result, sb, phys); 500abort: 501 unlock_kernel(); 502 return err; 503 504abort_too_big: 505 ufs_warning(sb, "ufs_get_block", "block > big"); 506 goto abort; 507} 508 509static struct buffer_head *ufs_getfrag(struct inode *inode, 510 unsigned int fragment, 511 int create, int *err) 512{ 513 struct buffer_head dummy; 514 int error; 515 516 dummy.b_state = 0; 517 dummy.b_blocknr = -1000; 518 error = ufs_getfrag_block(inode, fragment, &dummy, create); 519 *err = error; 520 if (!error && buffer_mapped(&dummy)) { 521 struct buffer_head *bh; 522 bh = sb_getblk(inode->i_sb, dummy.b_blocknr); 523 if (buffer_new(&dummy)) { 524 memset(bh->b_data, 0, inode->i_sb->s_blocksize); 525 set_buffer_uptodate(bh); 526 mark_buffer_dirty(bh); 527 } 528 return bh; 529 } 530 return NULL; 531} 532 533struct buffer_head * ufs_bread (struct inode * inode, unsigned fragment, 534 int create, int * err) 535{ 536 struct buffer_head * bh; 537 538 UFSD("ENTER, ino %lu, fragment %u\n", inode->i_ino, fragment); 539 bh = ufs_getfrag (inode, fragment, create, err); 540 if (!bh || buffer_uptodate(bh)) 541 return bh; 542 ll_rw_block (READ, 1, &bh); 543 wait_on_buffer (bh); 544 if (buffer_uptodate(bh)) 545 return bh; 546 brelse (bh); 547 *err = -EIO; 548 return NULL; 549} 550 551static int ufs_writepage(struct page *page, struct writeback_control *wbc) 552{ 553 return block_write_full_page(page,ufs_getfrag_block,wbc); 554} 555 556static int ufs_readpage(struct file *file, struct page *page) 557{ 558 return block_read_full_page(page,ufs_getfrag_block); 559} 560 561int ufs_prepare_chunk(struct page *page, loff_t pos, unsigned len) 562{ 563 return __block_write_begin(page, pos, len, ufs_getfrag_block); 564} 565 566static int ufs_write_begin(struct file *file, struct address_space *mapping, 567 loff_t pos, unsigned len, unsigned flags, 568 struct page **pagep, void **fsdata) 569{ 570 int ret; 571 572 ret = block_write_begin(mapping, pos, len, flags, pagep, 573 ufs_getfrag_block); 574 if (unlikely(ret)) { 575 loff_t isize = mapping->host->i_size; 576 if (pos + len > isize) 577 vmtruncate(mapping->host, isize); 578 } 579 580 return ret; 581} 582 583static sector_t ufs_bmap(struct address_space *mapping, sector_t block) 584{ 585 return generic_block_bmap(mapping,block,ufs_getfrag_block); 586} 587 588const struct address_space_operations ufs_aops = { 589 .readpage = ufs_readpage, 590 .writepage = ufs_writepage, 591 .sync_page = block_sync_page, 592 .write_begin = ufs_write_begin, 593 .write_end = generic_write_end, 594 .bmap = ufs_bmap 595}; 596 597static void ufs_set_inode_ops(struct inode *inode) 598{ 599 if (S_ISREG(inode->i_mode)) { 600 inode->i_op = &ufs_file_inode_operations; 601 inode->i_fop = &ufs_file_operations; 602 inode->i_mapping->a_ops = &ufs_aops; 603 } else if (S_ISDIR(inode->i_mode)) { 604 inode->i_op = &ufs_dir_inode_operations; 605 inode->i_fop = &ufs_dir_operations; 606 inode->i_mapping->a_ops = &ufs_aops; 607 } else if (S_ISLNK(inode->i_mode)) { 608 if (!inode->i_blocks) 609 inode->i_op = &ufs_fast_symlink_inode_operations; 610 else { 611 inode->i_op = &ufs_symlink_inode_operations; 612 inode->i_mapping->a_ops = &ufs_aops; 613 } 614 } else 615 init_special_inode(inode, inode->i_mode, 616 ufs_get_inode_dev(inode->i_sb, UFS_I(inode))); 617} 618 619static int ufs1_read_inode(struct inode *inode, struct ufs_inode *ufs_inode) 620{ 621 struct ufs_inode_info *ufsi = UFS_I(inode); 622 struct super_block *sb = inode->i_sb; 623 mode_t mode; 624 625 /* 626 * Copy data to the in-core inode. 627 */ 628 inode->i_mode = mode = fs16_to_cpu(sb, ufs_inode->ui_mode); 629 inode->i_nlink = fs16_to_cpu(sb, ufs_inode->ui_nlink); 630 if (inode->i_nlink == 0) { 631 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino); 632 return -1; 633 } 634 635 /* 636 * Linux now has 32-bit uid and gid, so we can support EFT. 637 */ 638 inode->i_uid = ufs_get_inode_uid(sb, ufs_inode); 639 inode->i_gid = ufs_get_inode_gid(sb, ufs_inode); 640 641 inode->i_size = fs64_to_cpu(sb, ufs_inode->ui_size); 642 inode->i_atime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_atime.tv_sec); 643 inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_ctime.tv_sec); 644 inode->i_mtime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_mtime.tv_sec); 645 inode->i_mtime.tv_nsec = 0; 646 inode->i_atime.tv_nsec = 0; 647 inode->i_ctime.tv_nsec = 0; 648 inode->i_blocks = fs32_to_cpu(sb, ufs_inode->ui_blocks); 649 inode->i_generation = fs32_to_cpu(sb, ufs_inode->ui_gen); 650 ufsi->i_flags = fs32_to_cpu(sb, ufs_inode->ui_flags); 651 ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); 652 ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); 653 654 655 if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { 656 memcpy(ufsi->i_u1.i_data, &ufs_inode->ui_u2.ui_addr, 657 sizeof(ufs_inode->ui_u2.ui_addr)); 658 } else { 659 memcpy(ufsi->i_u1.i_symlink, ufs_inode->ui_u2.ui_symlink, 660 sizeof(ufs_inode->ui_u2.ui_symlink) - 1); 661 ufsi->i_u1.i_symlink[sizeof(ufs_inode->ui_u2.ui_symlink) - 1] = 0; 662 } 663 return 0; 664} 665 666static int ufs2_read_inode(struct inode *inode, struct ufs2_inode *ufs2_inode) 667{ 668 struct ufs_inode_info *ufsi = UFS_I(inode); 669 struct super_block *sb = inode->i_sb; 670 mode_t mode; 671 672 UFSD("Reading ufs2 inode, ino %lu\n", inode->i_ino); 673 /* 674 * Copy data to the in-core inode. 675 */ 676 inode->i_mode = mode = fs16_to_cpu(sb, ufs2_inode->ui_mode); 677 inode->i_nlink = fs16_to_cpu(sb, ufs2_inode->ui_nlink); 678 if (inode->i_nlink == 0) { 679 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino); 680 return -1; 681 } 682 683 /* 684 * Linux now has 32-bit uid and gid, so we can support EFT. 685 */ 686 inode->i_uid = fs32_to_cpu(sb, ufs2_inode->ui_uid); 687 inode->i_gid = fs32_to_cpu(sb, ufs2_inode->ui_gid); 688 689 inode->i_size = fs64_to_cpu(sb, ufs2_inode->ui_size); 690 inode->i_atime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_atime); 691 inode->i_ctime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_ctime); 692 inode->i_mtime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_mtime); 693 inode->i_atime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_atimensec); 694 inode->i_ctime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_ctimensec); 695 inode->i_mtime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_mtimensec); 696 inode->i_blocks = fs64_to_cpu(sb, ufs2_inode->ui_blocks); 697 inode->i_generation = fs32_to_cpu(sb, ufs2_inode->ui_gen); 698 ufsi->i_flags = fs32_to_cpu(sb, ufs2_inode->ui_flags); 699 /* 700 ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); 701 ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); 702 */ 703 704 if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { 705 memcpy(ufsi->i_u1.u2_i_data, &ufs2_inode->ui_u2.ui_addr, 706 sizeof(ufs2_inode->ui_u2.ui_addr)); 707 } else { 708 memcpy(ufsi->i_u1.i_symlink, ufs2_inode->ui_u2.ui_symlink, 709 sizeof(ufs2_inode->ui_u2.ui_symlink) - 1); 710 ufsi->i_u1.i_symlink[sizeof(ufs2_inode->ui_u2.ui_symlink) - 1] = 0; 711 } 712 return 0; 713} 714 715struct inode *ufs_iget(struct super_block *sb, unsigned long ino) 716{ 717 struct ufs_inode_info *ufsi; 718 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 719 struct buffer_head * bh; 720 struct inode *inode; 721 int err; 722 723 UFSD("ENTER, ino %lu\n", ino); 724 725 if (ino < UFS_ROOTINO || ino > (uspi->s_ncg * uspi->s_ipg)) { 726 ufs_warning(sb, "ufs_read_inode", "bad inode number (%lu)\n", 727 ino); 728 return ERR_PTR(-EIO); 729 } 730 731 inode = iget_locked(sb, ino); 732 if (!inode) 733 return ERR_PTR(-ENOMEM); 734 if (!(inode->i_state & I_NEW)) 735 return inode; 736 737 ufsi = UFS_I(inode); 738 739 bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino)); 740 if (!bh) { 741 ufs_warning(sb, "ufs_read_inode", "unable to read inode %lu\n", 742 inode->i_ino); 743 goto bad_inode; 744 } 745 if ((UFS_SB(sb)->s_flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { 746 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data; 747 748 err = ufs2_read_inode(inode, 749 ufs2_inode + ufs_inotofsbo(inode->i_ino)); 750 } else { 751 struct ufs_inode *ufs_inode = (struct ufs_inode *)bh->b_data; 752 753 err = ufs1_read_inode(inode, 754 ufs_inode + ufs_inotofsbo(inode->i_ino)); 755 } 756 757 if (err) 758 goto bad_inode; 759 inode->i_version++; 760 ufsi->i_lastfrag = 761 (inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift; 762 ufsi->i_dir_start_lookup = 0; 763 ufsi->i_osync = 0; 764 765 ufs_set_inode_ops(inode); 766 767 brelse(bh); 768 769 UFSD("EXIT\n"); 770 unlock_new_inode(inode); 771 return inode; 772 773bad_inode: 774 iget_failed(inode); 775 return ERR_PTR(-EIO); 776} 777 778static void ufs1_update_inode(struct inode *inode, struct ufs_inode *ufs_inode) 779{ 780 struct super_block *sb = inode->i_sb; 781 struct ufs_inode_info *ufsi = UFS_I(inode); 782 783 ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode); 784 ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink); 785 786 ufs_set_inode_uid(sb, ufs_inode, inode->i_uid); 787 ufs_set_inode_gid(sb, ufs_inode, inode->i_gid); 788 789 ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size); 790 ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb, inode->i_atime.tv_sec); 791 ufs_inode->ui_atime.tv_usec = 0; 792 ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb, inode->i_ctime.tv_sec); 793 ufs_inode->ui_ctime.tv_usec = 0; 794 ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb, inode->i_mtime.tv_sec); 795 ufs_inode->ui_mtime.tv_usec = 0; 796 ufs_inode->ui_blocks = cpu_to_fs32(sb, inode->i_blocks); 797 ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags); 798 ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation); 799 800 if ((UFS_SB(sb)->s_flags & UFS_UID_MASK) == UFS_UID_EFT) { 801 ufs_inode->ui_u3.ui_sun.ui_shadow = cpu_to_fs32(sb, ufsi->i_shadow); 802 ufs_inode->ui_u3.ui_sun.ui_oeftflag = cpu_to_fs32(sb, ufsi->i_oeftflag); 803 } 804 805 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { 806 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */ 807 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.i_data[0]; 808 } else if (inode->i_blocks) { 809 memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.i_data, 810 sizeof(ufs_inode->ui_u2.ui_addr)); 811 } 812 else { 813 memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink, 814 sizeof(ufs_inode->ui_u2.ui_symlink)); 815 } 816 817 if (!inode->i_nlink) 818 memset (ufs_inode, 0, sizeof(struct ufs_inode)); 819} 820 821static void ufs2_update_inode(struct inode *inode, struct ufs2_inode *ufs_inode) 822{ 823 struct super_block *sb = inode->i_sb; 824 struct ufs_inode_info *ufsi = UFS_I(inode); 825 826 UFSD("ENTER\n"); 827 ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode); 828 ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink); 829 830 ufs_inode->ui_uid = cpu_to_fs32(sb, inode->i_uid); 831 ufs_inode->ui_gid = cpu_to_fs32(sb, inode->i_gid); 832 833 ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size); 834 ufs_inode->ui_atime = cpu_to_fs64(sb, inode->i_atime.tv_sec); 835 ufs_inode->ui_atimensec = cpu_to_fs32(sb, inode->i_atime.tv_nsec); 836 ufs_inode->ui_ctime = cpu_to_fs64(sb, inode->i_ctime.tv_sec); 837 ufs_inode->ui_ctimensec = cpu_to_fs32(sb, inode->i_ctime.tv_nsec); 838 ufs_inode->ui_mtime = cpu_to_fs64(sb, inode->i_mtime.tv_sec); 839 ufs_inode->ui_mtimensec = cpu_to_fs32(sb, inode->i_mtime.tv_nsec); 840 841 ufs_inode->ui_blocks = cpu_to_fs64(sb, inode->i_blocks); 842 ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags); 843 ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation); 844 845 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { 846 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */ 847 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.u2_i_data[0]; 848 } else if (inode->i_blocks) { 849 memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.u2_i_data, 850 sizeof(ufs_inode->ui_u2.ui_addr)); 851 } else { 852 memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink, 853 sizeof(ufs_inode->ui_u2.ui_symlink)); 854 } 855 856 if (!inode->i_nlink) 857 memset (ufs_inode, 0, sizeof(struct ufs2_inode)); 858 UFSD("EXIT\n"); 859} 860 861static int ufs_update_inode(struct inode * inode, int do_sync) 862{ 863 struct super_block *sb = inode->i_sb; 864 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 865 struct buffer_head * bh; 866 867 UFSD("ENTER, ino %lu\n", inode->i_ino); 868 869 if (inode->i_ino < UFS_ROOTINO || 870 inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) { 871 ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino); 872 return -1; 873 } 874 875 bh = sb_bread(sb, ufs_inotofsba(inode->i_ino)); 876 if (!bh) { 877 ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino); 878 return -1; 879 } 880 if (uspi->fs_magic == UFS2_MAGIC) { 881 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data; 882 883 ufs2_update_inode(inode, 884 ufs2_inode + ufs_inotofsbo(inode->i_ino)); 885 } else { 886 struct ufs_inode *ufs_inode = (struct ufs_inode *) bh->b_data; 887 888 ufs1_update_inode(inode, ufs_inode + ufs_inotofsbo(inode->i_ino)); 889 } 890 891 mark_buffer_dirty(bh); 892 if (do_sync) 893 sync_dirty_buffer(bh); 894 brelse (bh); 895 896 UFSD("EXIT\n"); 897 return 0; 898} 899 900int ufs_write_inode(struct inode *inode, struct writeback_control *wbc) 901{ 902 int ret; 903 lock_kernel(); 904 ret = ufs_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL); 905 unlock_kernel(); 906 return ret; 907} 908 909int ufs_sync_inode (struct inode *inode) 910{ 911 return ufs_update_inode (inode, 1); 912} 913 914void ufs_evict_inode(struct inode * inode) 915{ 916 int want_delete = 0; 917 918 if (!inode->i_nlink && !is_bad_inode(inode)) 919 want_delete = 1; 920 921 truncate_inode_pages(&inode->i_data, 0); 922 if (want_delete) { 923 loff_t old_i_size; 924 /*UFS_I(inode)->i_dtime = CURRENT_TIME;*/ 925 lock_kernel(); 926 mark_inode_dirty(inode); 927 ufs_update_inode(inode, IS_SYNC(inode)); 928 old_i_size = inode->i_size; 929 inode->i_size = 0; 930 if (inode->i_blocks && ufs_truncate(inode, old_i_size)) 931 ufs_warning(inode->i_sb, __func__, "ufs_truncate failed\n"); 932 unlock_kernel(); 933 } 934 935 invalidate_inode_buffers(inode); 936 end_writeback(inode); 937 938 if (want_delete) { 939 lock_kernel(); 940 ufs_free_inode (inode); 941 unlock_kernel(); 942 } 943} 944