fs/reiserfs/item

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This source file includes following definitions.
sd_bytes_number
sd_decrement_key
sd_is_left_mergeable
sd_print_item
sd_check_item
sd_create_vi
sd_check_left
sd_check_right
sd_part_size
sd_unit_num
sd_print_vi
direct_bytes_number
direct_decrement_key
direct_is_left_mergeable
direct_print_item
direct_check_item
direct_create_vi
direct_check_left
direct_check_right
direct_part_size
direct_unit_num
direct_print_vi
indirect_bytes_number
indirect_decrement_key
indirect_is_left_mergeable
start_new_sequence
sequence_finished
print_sequence
indirect_print_item
indirect_check_item
indirect_create_vi
indirect_check_left
indirect_check_right
indirect_part_size
indirect_unit_num
indirect_print_vi
direntry_bytes_number
direntry_decrement_key
direntry_is_left_mergeable
direntry_print_item
direntry_check_item
old_entry_num
direntry_create_vi
direntry_check_left
direntry_check_right
direntry_part_size
direntry_unit_num
direntry_print_vi
errcatch_bytes_number
errcatch_decrement_key
errcatch_is_left_mergeable
errcatch_print_item
errcatch_check_item
errcatch_create_vi
errcatch_check_left
errcatch_check_right
errcatch_part_size
errcatch_unit_num
errcatch_print_vi
   1 /*
   2  * Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README
   3  */
   4 
   5 #include <linux/time.h>
   6 #include "reiserfs.h"
   7 
   8 /*
   9  * this contains item handlers for old item types: sd, direct,
  10  * indirect, directory
  11  */
  12 
  13 /*
  14  * and where are the comments? how about saying where we can find an
  15  * explanation of each item handler method? -Hans
  16  */
  17 
  18 /* stat data functions */
  19 static int sd_bytes_number(struct item_head *ih, int block_size)
  20 {
  21         return 0;
  22 }
  23 
  24 static void sd_decrement_key(struct cpu_key *key)
  25 {
  26         key->on_disk_key.k_objectid--;
  27         set_cpu_key_k_type(key, TYPE_ANY);
  28         set_cpu_key_k_offset(key, (loff_t)(~0ULL >> 1));
  29 }
  30 
  31 static int sd_is_left_mergeable(struct reiserfs_key *key, unsigned long bsize)
  32 {
  33         return 0;
  34 }
  35 
  36 static void sd_print_item(struct item_head *ih, char *item)
  37 {
  38         printk("\tmode | size | nlinks | first direct | mtime\n");
  39         if (stat_data_v1(ih)) {
  40                 struct stat_data_v1 *sd = (struct stat_data_v1 *)item;
  41 
  42                 printk("\t0%-6o | %6u | %2u | %d | %u\n", sd_v1_mode(sd),
  43                        sd_v1_size(sd), sd_v1_nlink(sd),
  44                        sd_v1_first_direct_byte(sd),
  45                        sd_v1_mtime(sd));
  46         } else {
  47                 struct stat_data *sd = (struct stat_data *)item;
  48 
  49                 printk("\t0%-6o | %6llu | %2u | %d | %u\n", sd_v2_mode(sd),
  50                        (unsigned long long)sd_v2_size(sd), sd_v2_nlink(sd),
  51                        sd_v2_rdev(sd), sd_v2_mtime(sd));
  52         }
  53 }
  54 
  55 static void sd_check_item(struct item_head *ih, char *item)
  56 {
  57         /* unused */
  58 }
  59 
  60 static int sd_create_vi(struct virtual_node *vn,
  61                         struct virtual_item *vi,
  62                         int is_affected, int insert_size)
  63 {
  64         vi->vi_index = TYPE_STAT_DATA;
  65         return 0;
  66 }
  67 
  68 static int sd_check_left(struct virtual_item *vi, int free,
  69                          int start_skip, int end_skip)
  70 {
  71         BUG_ON(start_skip || end_skip);
  72         return -1;
  73 }
  74 
  75 static int sd_check_right(struct virtual_item *vi, int free)
  76 {
  77         return -1;
  78 }
  79 
  80 static int sd_part_size(struct virtual_item *vi, int first, int count)
  81 {
  82         BUG_ON(count);
  83         return 0;
  84 }
  85 
  86 static int sd_unit_num(struct virtual_item *vi)
  87 {
  88         return vi->vi_item_len - IH_SIZE;
  89 }
  90 
  91 static void sd_print_vi(struct virtual_item *vi)
  92 {
  93         reiserfs_warning(NULL, "reiserfs-16100",
  94                          "STATDATA, index %d, type 0x%x, %h",
  95                          vi->vi_index, vi->vi_type, vi->vi_ih);
  96 }
  97 
  98 static struct item_operations stat_data_ops = {
  99         .bytes_number = sd_bytes_number,
 100         .decrement_key = sd_decrement_key,
 101         .is_left_mergeable = sd_is_left_mergeable,
 102         .print_item = sd_print_item,
 103         .check_item = sd_check_item,
 104 
 105         .create_vi = sd_create_vi,
 106         .check_left = sd_check_left,
 107         .check_right = sd_check_right,
 108         .part_size = sd_part_size,
 109         .unit_num = sd_unit_num,
 110         .print_vi = sd_print_vi
 111 };
 112 
 113 /* direct item functions */
 114 static int direct_bytes_number(struct item_head *ih, int block_size)
 115 {
 116         return ih_item_len(ih);
 117 }
 118 
 119 /* FIXME: this should probably switch to indirect as well */
 120 static void direct_decrement_key(struct cpu_key *key)
 121 {
 122         cpu_key_k_offset_dec(key);
 123         if (cpu_key_k_offset(key) == 0)
 124                 set_cpu_key_k_type(key, TYPE_STAT_DATA);
 125 }
 126 
 127 static int direct_is_left_mergeable(struct reiserfs_key *key,
 128                                     unsigned long bsize)
 129 {
 130         int version = le_key_version(key);
 131         return ((le_key_k_offset(version, key) & (bsize - 1)) != 1);
 132 }
 133 
 134 static void direct_print_item(struct item_head *ih, char *item)
 135 {
 136         int j = 0;
 137 
 138 /*    return; */
 139         printk("\"");
 140         while (j < ih_item_len(ih))
 141                 printk("%c", item[j++]);
 142         printk("\"\n");
 143 }
 144 
 145 static void direct_check_item(struct item_head *ih, char *item)
 146 {
 147         /* unused */
 148 }
 149 
 150 static int direct_create_vi(struct virtual_node *vn,
 151                             struct virtual_item *vi,
 152                             int is_affected, int insert_size)
 153 {
 154         vi->vi_index = TYPE_DIRECT;
 155         return 0;
 156 }
 157 
 158 static int direct_check_left(struct virtual_item *vi, int free,
 159                              int start_skip, int end_skip)
 160 {
 161         int bytes;
 162 
 163         bytes = free - free % 8;
 164         return bytes ? : -1;
 165 }
 166 
 167 static int direct_check_right(struct virtual_item *vi, int free)
 168 {
 169         return direct_check_left(vi, free, 0, 0);
 170 }
 171 
 172 static int direct_part_size(struct virtual_item *vi, int first, int count)
 173 {
 174         return count;
 175 }
 176 
 177 static int direct_unit_num(struct virtual_item *vi)
 178 {
 179         return vi->vi_item_len - IH_SIZE;
 180 }
 181 
 182 static void direct_print_vi(struct virtual_item *vi)
 183 {
 184         reiserfs_warning(NULL, "reiserfs-16101",
 185                          "DIRECT, index %d, type 0x%x, %h",
 186                          vi->vi_index, vi->vi_type, vi->vi_ih);
 187 }
 188 
 189 static struct item_operations direct_ops = {
 190         .bytes_number = direct_bytes_number,
 191         .decrement_key = direct_decrement_key,
 192         .is_left_mergeable = direct_is_left_mergeable,
 193         .print_item = direct_print_item,
 194         .check_item = direct_check_item,
 195 
 196         .create_vi = direct_create_vi,
 197         .check_left = direct_check_left,
 198         .check_right = direct_check_right,
 199         .part_size = direct_part_size,
 200         .unit_num = direct_unit_num,
 201         .print_vi = direct_print_vi
 202 };
 203 
 204 /* indirect item functions */
 205 static int indirect_bytes_number(struct item_head *ih, int block_size)
 206 {
 207         return ih_item_len(ih) / UNFM_P_SIZE * block_size;
 208 }
 209 
 210 /* decrease offset, if it becomes 0, change type to stat data */
 211 static void indirect_decrement_key(struct cpu_key *key)
 212 {
 213         cpu_key_k_offset_dec(key);
 214         if (cpu_key_k_offset(key) == 0)
 215                 set_cpu_key_k_type(key, TYPE_STAT_DATA);
 216 }
 217 
 218 /* if it is not first item of the body, then it is mergeable */
 219 static int indirect_is_left_mergeable(struct reiserfs_key *key,
 220                                       unsigned long bsize)
 221 {
 222         int version = le_key_version(key);
 223         return (le_key_k_offset(version, key) != 1);
 224 }
 225 
 226 /* printing of indirect item */
 227 static void start_new_sequence(__u32 * start, int *len, __u32 new)
 228 {
 229         *start = new;
 230         *len = 1;
 231 }
 232 
 233 static int sequence_finished(__u32 start, int *len, __u32 new)
 234 {
 235         if (start == INT_MAX)
 236                 return 1;
 237 
 238         if (start == 0 && new == 0) {
 239                 (*len)++;
 240                 return 0;
 241         }
 242         if (start != 0 && (start + *len) == new) {
 243                 (*len)++;
 244                 return 0;
 245         }
 246         return 1;
 247 }
 248 
 249 static void print_sequence(__u32 start, int len)
 250 {
 251         if (start == INT_MAX)
 252                 return;
 253 
 254         if (len == 1)
 255                 printk(" %d", start);
 256         else
 257                 printk(" %d(%d)", start, len);
 258 }
 259 
 260 static void indirect_print_item(struct item_head *ih, char *item)
 261 {
 262         int j;
 263         __le32 *unp;
 264         __u32 prev = INT_MAX;
 265         int num = 0;
 266 
 267         unp = (__le32 *) item;
 268 
 269         if (ih_item_len(ih) % UNFM_P_SIZE)
 270                 reiserfs_warning(NULL, "reiserfs-16102", "invalid item len");
 271 
 272         printk("%d pointers\n[ ", (int)I_UNFM_NUM(ih));
 273         for (j = 0; j < I_UNFM_NUM(ih); j++) {
 274                 if (sequence_finished(prev, &num, get_block_num(unp, j))) {
 275                         print_sequence(prev, num);
 276                         start_new_sequence(&prev, &num, get_block_num(unp, j));
 277                 }
 278         }
 279         print_sequence(prev, num);
 280         printk("]\n");
 281 }
 282 
 283 static void indirect_check_item(struct item_head *ih, char *item)
 284 {
 285         /* unused */
 286 }
 287 
 288 static int indirect_create_vi(struct virtual_node *vn,
 289                               struct virtual_item *vi,
 290                               int is_affected, int insert_size)
 291 {
 292         vi->vi_index = TYPE_INDIRECT;
 293         return 0;
 294 }
 295 
 296 static int indirect_check_left(struct virtual_item *vi, int free,
 297                                int start_skip, int end_skip)
 298 {
 299         int bytes;
 300 
 301         bytes = free - free % UNFM_P_SIZE;
 302         return bytes ? : -1;
 303 }
 304 
 305 static int indirect_check_right(struct virtual_item *vi, int free)
 306 {
 307         return indirect_check_left(vi, free, 0, 0);
 308 }
 309 
 310 /*
 311  * return size in bytes of 'units' units. If first == 0 - calculate
 312  * from the head (left), otherwise - from tail (right)
 313  */
 314 static int indirect_part_size(struct virtual_item *vi, int first, int units)
 315 {
 316         /* unit of indirect item is byte (yet) */
 317         return units;
 318 }
 319 
 320 static int indirect_unit_num(struct virtual_item *vi)
 321 {
 322         /* unit of indirect item is byte (yet) */
 323         return vi->vi_item_len - IH_SIZE;
 324 }
 325 
 326 static void indirect_print_vi(struct virtual_item *vi)
 327 {
 328         reiserfs_warning(NULL, "reiserfs-16103",
 329                          "INDIRECT, index %d, type 0x%x, %h",
 330                          vi->vi_index, vi->vi_type, vi->vi_ih);
 331 }
 332 
 333 static struct item_operations indirect_ops = {
 334         .bytes_number = indirect_bytes_number,
 335         .decrement_key = indirect_decrement_key,
 336         .is_left_mergeable = indirect_is_left_mergeable,
 337         .print_item = indirect_print_item,
 338         .check_item = indirect_check_item,
 339 
 340         .create_vi = indirect_create_vi,
 341         .check_left = indirect_check_left,
 342         .check_right = indirect_check_right,
 343         .part_size = indirect_part_size,
 344         .unit_num = indirect_unit_num,
 345         .print_vi = indirect_print_vi
 346 };
 347 
 348 /* direntry functions */
 349 static int direntry_bytes_number(struct item_head *ih, int block_size)
 350 {
 351         reiserfs_warning(NULL, "vs-16090",
 352                          "bytes number is asked for direntry");
 353         return 0;
 354 }
 355 
 356 static void direntry_decrement_key(struct cpu_key *key)
 357 {
 358         cpu_key_k_offset_dec(key);
 359         if (cpu_key_k_offset(key) == 0)
 360                 set_cpu_key_k_type(key, TYPE_STAT_DATA);
 361 }
 362 
 363 static int direntry_is_left_mergeable(struct reiserfs_key *key,
 364                                       unsigned long bsize)
 365 {
 366         if (le32_to_cpu(key->u.k_offset_v1.k_offset) == DOT_OFFSET)
 367                 return 0;
 368         return 1;
 369 
 370 }
 371 
 372 static void direntry_print_item(struct item_head *ih, char *item)
 373 {
 374         int i;
 375         int namelen;
 376         struct reiserfs_de_head *deh;
 377         char *name;
 378         static char namebuf[80];
 379 
 380         printk("\n # %-15s%-30s%-15s%-15s%-15s\n", "Name",
 381                "Key of pointed object", "Hash", "Gen number", "Status");
 382 
 383         deh = (struct reiserfs_de_head *)item;
 384 
 385         for (i = 0; i < ih_entry_count(ih); i++, deh++) {
 386                 namelen =
 387                     (i ? (deh_location(deh - 1)) : ih_item_len(ih)) -
 388                     deh_location(deh);
 389                 name = item + deh_location(deh);
 390                 if (name[namelen - 1] == 0)
 391                         namelen = strlen(name);
 392                 namebuf[0] = '"';
 393                 if (namelen > sizeof(namebuf) - 3) {
 394                         strncpy(namebuf + 1, name, sizeof(namebuf) - 3);
 395                         namebuf[sizeof(namebuf) - 2] = '"';
 396                         namebuf[sizeof(namebuf) - 1] = 0;
 397                 } else {
 398                         memcpy(namebuf + 1, name, namelen);
 399                         namebuf[namelen + 1] = '"';
 400                         namebuf[namelen + 2] = 0;
 401                 }
 402 
 403                 printk("%d:  %-15s%-15d%-15d%-15lld%-15lld(%s)\n",
 404                        i, namebuf,
 405                        deh_dir_id(deh), deh_objectid(deh),
 406                        GET_HASH_VALUE(deh_offset(deh)),
 407                        GET_GENERATION_NUMBER((deh_offset(deh))),
 408                        (de_hidden(deh)) ? "HIDDEN" : "VISIBLE");
 409         }
 410 }
 411 
 412 static void direntry_check_item(struct item_head *ih, char *item)
 413 {
 414         int i;
 415         struct reiserfs_de_head *deh;
 416 
 417         /* unused */
 418         deh = (struct reiserfs_de_head *)item;
 419         for (i = 0; i < ih_entry_count(ih); i++, deh++) {
 420                 ;
 421         }
 422 }
 423 
 424 #define DIRENTRY_VI_FIRST_DIRENTRY_ITEM 1
 425 
 426 /*
 427  * function returns old entry number in directory item in real node
 428  * using new entry number in virtual item in virtual node
 429  */
 430 static inline int old_entry_num(int is_affected, int virtual_entry_num,
 431                                 int pos_in_item, int mode)
 432 {
 433         if (mode == M_INSERT || mode == M_DELETE)
 434                 return virtual_entry_num;
 435 
 436         if (!is_affected)
 437                 /* cut or paste is applied to another item */
 438                 return virtual_entry_num;
 439 
 440         if (virtual_entry_num < pos_in_item)
 441                 return virtual_entry_num;
 442 
 443         if (mode == M_CUT)
 444                 return virtual_entry_num + 1;
 445 
 446         RFALSE(mode != M_PASTE || virtual_entry_num == 0,
 447                "vs-8015: old_entry_num: mode must be M_PASTE (mode = \'%c\'",
 448                mode);
 449 
 450         return virtual_entry_num - 1;
 451 }
 452 
 453 /*
 454  * Create an array of sizes of directory entries for virtual
 455  * item. Return space used by an item. FIXME: no control over
 456  * consuming of space used by this item handler
 457  */
 458 static int direntry_create_vi(struct virtual_node *vn,
 459                               struct virtual_item *vi,
 460                               int is_affected, int insert_size)
 461 {
 462         struct direntry_uarea *dir_u = vi->vi_uarea;
 463         int i, j;
 464         int size = sizeof(struct direntry_uarea);
 465         struct reiserfs_de_head *deh;
 466 
 467         vi->vi_index = TYPE_DIRENTRY;
 468 
 469         BUG_ON(!(vi->vi_ih) || !vi->vi_item);
 470 
 471         dir_u->flags = 0;
 472         if (le_ih_k_offset(vi->vi_ih) == DOT_OFFSET)
 473                 dir_u->flags |= DIRENTRY_VI_FIRST_DIRENTRY_ITEM;
 474 
 475         deh = (struct reiserfs_de_head *)(vi->vi_item);
 476 
 477         /* virtual directory item have this amount of entry after */
 478         dir_u->entry_count = ih_entry_count(vi->vi_ih) +
 479             ((is_affected) ? ((vn->vn_mode == M_CUT) ? -1 :
 480                               (vn->vn_mode == M_PASTE ? 1 : 0)) : 0);
 481 
 482         for (i = 0; i < dir_u->entry_count; i++) {
 483                 j = old_entry_num(is_affected, i, vn->vn_pos_in_item,
 484                                   vn->vn_mode);
 485                 dir_u->entry_sizes[i] =
 486                     (j ? deh_location(&deh[j - 1]) : ih_item_len(vi->vi_ih)) -
 487                     deh_location(&deh[j]) + DEH_SIZE;
 488         }
 489 
 490         size += (dir_u->entry_count * sizeof(short));
 491 
 492         /* set size of pasted entry */
 493         if (is_affected && vn->vn_mode == M_PASTE)
 494                 dir_u->entry_sizes[vn->vn_pos_in_item] = insert_size;
 495 
 496 #ifdef CONFIG_REISERFS_CHECK
 497         /* compare total size of entries with item length */
 498         {
 499                 int k, l;
 500 
 501                 l = 0;
 502                 for (k = 0; k < dir_u->entry_count; k++)
 503                         l += dir_u->entry_sizes[k];
 504 
 505                 if (l + IH_SIZE != vi->vi_item_len +
 506                     ((is_affected
 507                       && (vn->vn_mode == M_PASTE
 508                           || vn->vn_mode == M_CUT)) ? insert_size : 0)) {
 509                         reiserfs_panic(NULL, "vs-8025", "(mode==%c, "
 510                                        "insert_size==%d), invalid length of "
 511                                        "directory item",
 512                                        vn->vn_mode, insert_size);
 513                 }
 514         }
 515 #endif
 516 
 517         return size;
 518 
 519 }
 520 
 521 /*
 522  * return number of entries which may fit into specified amount of
 523  * free space, or -1 if free space is not enough even for 1 entry
 524  */
 525 static int direntry_check_left(struct virtual_item *vi, int free,
 526                                int start_skip, int end_skip)
 527 {
 528         int i;
 529         int entries = 0;
 530         struct direntry_uarea *dir_u = vi->vi_uarea;
 531 
 532         for (i = start_skip; i < dir_u->entry_count - end_skip; i++) {
 533                 /* i-th entry doesn't fit into the remaining free space */
 534                 if (dir_u->entry_sizes[i] > free)
 535                         break;
 536 
 537                 free -= dir_u->entry_sizes[i];
 538                 entries++;
 539         }
 540 
 541         if (entries == dir_u->entry_count) {
 542                 reiserfs_panic(NULL, "item_ops-1",
 543                                "free space %d, entry_count %d", free,
 544                                dir_u->entry_count);
 545         }
 546 
 547         /* "." and ".." can not be separated from each other */
 548         if (start_skip == 0 && (dir_u->flags & DIRENTRY_VI_FIRST_DIRENTRY_ITEM)
 549             && entries < 2)
 550                 entries = 0;
 551 
 552         return entries ? : -1;
 553 }
 554 
 555 static int direntry_check_right(struct virtual_item *vi, int free)
 556 {
 557         int i;
 558         int entries = 0;
 559         struct direntry_uarea *dir_u = vi->vi_uarea;
 560 
 561         for (i = dir_u->entry_count - 1; i >= 0; i--) {
 562                 /* i-th entry doesn't fit into the remaining free space */
 563                 if (dir_u->entry_sizes[i] > free)
 564                         break;
 565 
 566                 free -= dir_u->entry_sizes[i];
 567                 entries++;
 568         }
 569         BUG_ON(entries == dir_u->entry_count);
 570 
 571         /* "." and ".." can not be separated from each other */
 572         if ((dir_u->flags & DIRENTRY_VI_FIRST_DIRENTRY_ITEM)
 573             && entries > dir_u->entry_count - 2)
 574                 entries = dir_u->entry_count - 2;
 575 
 576         return entries ? : -1;
 577 }
 578 
 579 /* sum of entry sizes between from-th and to-th entries including both edges */
 580 static int direntry_part_size(struct virtual_item *vi, int first, int count)
 581 {
 582         int i, retval;
 583         int from, to;
 584         struct direntry_uarea *dir_u = vi->vi_uarea;
 585 
 586         retval = 0;
 587         if (first == 0)
 588                 from = 0;
 589         else
 590                 from = dir_u->entry_count - count;
 591         to = from + count - 1;
 592 
 593         for (i = from; i <= to; i++)
 594                 retval += dir_u->entry_sizes[i];
 595 
 596         return retval;
 597 }
 598 
 599 static int direntry_unit_num(struct virtual_item *vi)
 600 {
 601         struct direntry_uarea *dir_u = vi->vi_uarea;
 602 
 603         return dir_u->entry_count;
 604 }
 605 
 606 static void direntry_print_vi(struct virtual_item *vi)
 607 {
 608         int i;
 609         struct direntry_uarea *dir_u = vi->vi_uarea;
 610 
 611         reiserfs_warning(NULL, "reiserfs-16104",
 612                          "DIRENTRY, index %d, type 0x%x, %h, flags 0x%x",
 613                          vi->vi_index, vi->vi_type, vi->vi_ih, dir_u->flags);
 614         printk("%d entries: ", dir_u->entry_count);
 615         for (i = 0; i < dir_u->entry_count; i++)
 616                 printk("%d ", dir_u->entry_sizes[i]);
 617         printk("\n");
 618 }
 619 
 620 static struct item_operations direntry_ops = {
 621         .bytes_number = direntry_bytes_number,
 622         .decrement_key = direntry_decrement_key,
 623         .is_left_mergeable = direntry_is_left_mergeable,
 624         .print_item = direntry_print_item,
 625         .check_item = direntry_check_item,
 626 
 627         .create_vi = direntry_create_vi,
 628         .check_left = direntry_check_left,
 629         .check_right = direntry_check_right,
 630         .part_size = direntry_part_size,
 631         .unit_num = direntry_unit_num,
 632         .print_vi = direntry_print_vi
 633 };
 634 
 635 /* Error catching functions to catch errors caused by incorrect item types. */
 636 static int errcatch_bytes_number(struct item_head *ih, int block_size)
 637 {
 638         reiserfs_warning(NULL, "green-16001",
 639                          "Invalid item type observed, run fsck ASAP");
 640         return 0;
 641 }
 642 
 643 static void errcatch_decrement_key(struct cpu_key *key)
 644 {
 645         reiserfs_warning(NULL, "green-16002",
 646                          "Invalid item type observed, run fsck ASAP");
 647 }
 648 
 649 static int errcatch_is_left_mergeable(struct reiserfs_key *key,
 650                                       unsigned long bsize)
 651 {
 652         reiserfs_warning(NULL, "green-16003",
 653                          "Invalid item type observed, run fsck ASAP");
 654         return 0;
 655 }
 656 
 657 static void errcatch_print_item(struct item_head *ih, char *item)
 658 {
 659         reiserfs_warning(NULL, "green-16004",
 660                          "Invalid item type observed, run fsck ASAP");
 661 }
 662 
 663 static void errcatch_check_item(struct item_head *ih, char *item)
 664 {
 665         reiserfs_warning(NULL, "green-16005",
 666                          "Invalid item type observed, run fsck ASAP");
 667 }
 668 
 669 static int errcatch_create_vi(struct virtual_node *vn,
 670                               struct virtual_item *vi,
 671                               int is_affected, int insert_size)
 672 {
 673         reiserfs_warning(NULL, "green-16006",
 674                          "Invalid item type observed, run fsck ASAP");
 675         /*
 676          * We might return -1 here as well, but it won't help as
 677          * create_virtual_node() from where this operation is called
 678          * from is of return type void.
 679          */
 680         return 0;
 681 }
 682 
 683 static int errcatch_check_left(struct virtual_item *vi, int free,
 684                                int start_skip, int end_skip)
 685 {
 686         reiserfs_warning(NULL, "green-16007",
 687                          "Invalid item type observed, run fsck ASAP");
 688         return -1;
 689 }
 690 
 691 static int errcatch_check_right(struct virtual_item *vi, int free)
 692 {
 693         reiserfs_warning(NULL, "green-16008",
 694                          "Invalid item type observed, run fsck ASAP");
 695         return -1;
 696 }
 697 
 698 static int errcatch_part_size(struct virtual_item *vi, int first, int count)
 699 {
 700         reiserfs_warning(NULL, "green-16009",
 701                          "Invalid item type observed, run fsck ASAP");
 702         return 0;
 703 }
 704 
 705 static int errcatch_unit_num(struct virtual_item *vi)
 706 {
 707         reiserfs_warning(NULL, "green-16010",
 708                          "Invalid item type observed, run fsck ASAP");
 709         return 0;
 710 }
 711 
 712 static void errcatch_print_vi(struct virtual_item *vi)
 713 {
 714         reiserfs_warning(NULL, "green-16011",
 715                          "Invalid item type observed, run fsck ASAP");
 716 }
 717 
 718 static struct item_operations errcatch_ops = {
 719         .bytes_number = errcatch_bytes_number,
 720         .decrement_key = errcatch_decrement_key,
 721         .is_left_mergeable = errcatch_is_left_mergeable,
 722         .print_item = errcatch_print_item,
 723         .check_item = errcatch_check_item,
 724 
 725         .create_vi = errcatch_create_vi,
 726         .check_left = errcatch_check_left,
 727         .check_right = errcatch_check_right,
 728         .part_size = errcatch_part_size,
 729         .unit_num = errcatch_unit_num,
 730         .print_vi = errcatch_print_vi
 731 };
 732 
 733 #if ! (TYPE_STAT_DATA == 0 && TYPE_INDIRECT == 1 && TYPE_DIRECT == 2 && TYPE_DIRENTRY == 3)
 734 #error Item types must use disk-format assigned values.
 735 #endif
 736 
 737 struct item_operations *item_ops[TYPE_ANY + 1] = {
 738         &stat_data_ops,
 739         &indirect_ops,
 740         &direct_ops,
 741         &direntry_ops,
 742         NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
 743         &errcatch_ops           /* This is to catch errors with invalid type (15th entry for TYPE_ANY) */
 744 };
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root/fs/reiserfs/item_ops.c

DEFINITIONS
