Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README | |
3 | */ | |
4 | ||
5 | #include <linux/time.h> | |
f466c6fd | 6 | #include "reiserfs.h" |
1da177e4 | 7 | |
098297b2 JM |
8 | /* |
9 | * this contains item handlers for old item types: sd, direct, | |
10 | * indirect, directory | |
11 | */ | |
1da177e4 | 12 | |
098297b2 JM |
13 | /* |
14 | * and where are the comments? how about saying where we can find an | |
15 | * explanation of each item handler method? -Hans | |
16 | */ | |
1da177e4 | 17 | |
098297b2 | 18 | /* stat data functions */ |
bd4c625c | 19 | static int sd_bytes_number(struct item_head *ih, int block_size) |
1da177e4 | 20 | { |
bd4c625c | 21 | return 0; |
1da177e4 LT |
22 | } |
23 | ||
bd4c625c | 24 | static void sd_decrement_key(struct cpu_key *key) |
1da177e4 | 25 | { |
bd4c625c LT |
26 | key->on_disk_key.k_objectid--; |
27 | set_cpu_key_k_type(key, TYPE_ANY); | |
6d205f12 | 28 | set_cpu_key_k_offset(key, (loff_t)(~0ULL >> 1)); |
1da177e4 LT |
29 | } |
30 | ||
bd4c625c | 31 | static int sd_is_left_mergeable(struct reiserfs_key *key, unsigned long bsize) |
1da177e4 | 32 | { |
bd4c625c | 33 | return 0; |
1da177e4 LT |
34 | } |
35 | ||
bd4c625c | 36 | static char *print_time(time_t t) |
1da177e4 | 37 | { |
bd4c625c | 38 | static char timebuf[256]; |
1da177e4 | 39 | |
bd4c625c LT |
40 | sprintf(timebuf, "%ld", t); |
41 | return timebuf; | |
1da177e4 LT |
42 | } |
43 | ||
bd4c625c | 44 | static void sd_print_item(struct item_head *ih, char *item) |
1da177e4 | 45 | { |
bd4c625c LT |
46 | printk("\tmode | size | nlinks | first direct | mtime\n"); |
47 | if (stat_data_v1(ih)) { | |
48 | struct stat_data_v1 *sd = (struct stat_data_v1 *)item; | |
1da177e4 | 49 | |
bd4c625c LT |
50 | printk("\t0%-6o | %6u | %2u | %d | %s\n", sd_v1_mode(sd), |
51 | sd_v1_size(sd), sd_v1_nlink(sd), | |
52 | sd_v1_first_direct_byte(sd), | |
53 | print_time(sd_v1_mtime(sd))); | |
54 | } else { | |
55 | struct stat_data *sd = (struct stat_data *)item; | |
1da177e4 | 56 | |
53872ed0 | 57 | printk("\t0%-6o | %6llu | %2u | %d | %s\n", sd_v2_mode(sd), |
bd4c625c LT |
58 | (unsigned long long)sd_v2_size(sd), sd_v2_nlink(sd), |
59 | sd_v2_rdev(sd), print_time(sd_v2_mtime(sd))); | |
60 | } | |
1da177e4 LT |
61 | } |
62 | ||
bd4c625c | 63 | static void sd_check_item(struct item_head *ih, char *item) |
1da177e4 | 64 | { |
098297b2 | 65 | /* unused */ |
1da177e4 LT |
66 | } |
67 | ||
bd4c625c LT |
68 | static int sd_create_vi(struct virtual_node *vn, |
69 | struct virtual_item *vi, | |
70 | int is_affected, int insert_size) | |
1da177e4 | 71 | { |
bd4c625c | 72 | vi->vi_index = TYPE_STAT_DATA; |
bd4c625c | 73 | return 0; |
1da177e4 LT |
74 | } |
75 | ||
bd4c625c LT |
76 | static int sd_check_left(struct virtual_item *vi, int free, |
77 | int start_skip, int end_skip) | |
1da177e4 | 78 | { |
14a61442 | 79 | BUG_ON(start_skip || end_skip); |
bd4c625c | 80 | return -1; |
1da177e4 LT |
81 | } |
82 | ||
bd4c625c | 83 | static int sd_check_right(struct virtual_item *vi, int free) |
1da177e4 | 84 | { |
bd4c625c | 85 | return -1; |
1da177e4 LT |
86 | } |
87 | ||
bd4c625c | 88 | static int sd_part_size(struct virtual_item *vi, int first, int count) |
1da177e4 | 89 | { |
14a61442 | 90 | BUG_ON(count); |
bd4c625c | 91 | return 0; |
1da177e4 LT |
92 | } |
93 | ||
bd4c625c | 94 | static int sd_unit_num(struct virtual_item *vi) |
1da177e4 | 95 | { |
bd4c625c | 96 | return vi->vi_item_len - IH_SIZE; |
1da177e4 LT |
97 | } |
98 | ||
bd4c625c | 99 | static void sd_print_vi(struct virtual_item *vi) |
1da177e4 | 100 | { |
45b03d5e JM |
101 | reiserfs_warning(NULL, "reiserfs-16100", |
102 | "STATDATA, index %d, type 0x%x, %h", | |
bd4c625c | 103 | vi->vi_index, vi->vi_type, vi->vi_ih); |
1da177e4 LT |
104 | } |
105 | ||
106 | static struct item_operations stat_data_ops = { | |
bd4c625c LT |
107 | .bytes_number = sd_bytes_number, |
108 | .decrement_key = sd_decrement_key, | |
109 | .is_left_mergeable = sd_is_left_mergeable, | |
110 | .print_item = sd_print_item, | |
111 | .check_item = sd_check_item, | |
112 | ||
113 | .create_vi = sd_create_vi, | |
114 | .check_left = sd_check_left, | |
115 | .check_right = sd_check_right, | |
116 | .part_size = sd_part_size, | |
117 | .unit_num = sd_unit_num, | |
118 | .print_vi = sd_print_vi | |
1da177e4 LT |
119 | }; |
120 | ||
098297b2 | 121 | /* direct item functions */ |
bd4c625c | 122 | static int direct_bytes_number(struct item_head *ih, int block_size) |
1da177e4 | 123 | { |
bd4c625c | 124 | return ih_item_len(ih); |
1da177e4 LT |
125 | } |
126 | ||
098297b2 | 127 | /* FIXME: this should probably switch to indirect as well */ |
bd4c625c | 128 | static void direct_decrement_key(struct cpu_key *key) |
1da177e4 | 129 | { |
bd4c625c LT |
130 | cpu_key_k_offset_dec(key); |
131 | if (cpu_key_k_offset(key) == 0) | |
132 | set_cpu_key_k_type(key, TYPE_STAT_DATA); | |
1da177e4 LT |
133 | } |
134 | ||
bd4c625c LT |
135 | static int direct_is_left_mergeable(struct reiserfs_key *key, |
136 | unsigned long bsize) | |
1da177e4 | 137 | { |
bd4c625c LT |
138 | int version = le_key_version(key); |
139 | return ((le_key_k_offset(version, key) & (bsize - 1)) != 1); | |
1da177e4 LT |
140 | } |
141 | ||
bd4c625c | 142 | static void direct_print_item(struct item_head *ih, char *item) |
1da177e4 | 143 | { |
bd4c625c | 144 | int j = 0; |
1da177e4 | 145 | |
098297b2 | 146 | /* return; */ |
bd4c625c LT |
147 | printk("\""); |
148 | while (j < ih_item_len(ih)) | |
149 | printk("%c", item[j++]); | |
150 | printk("\"\n"); | |
1da177e4 LT |
151 | } |
152 | ||
bd4c625c | 153 | static void direct_check_item(struct item_head *ih, char *item) |
1da177e4 | 154 | { |
098297b2 | 155 | /* unused */ |
1da177e4 LT |
156 | } |
157 | ||
bd4c625c LT |
158 | static int direct_create_vi(struct virtual_node *vn, |
159 | struct virtual_item *vi, | |
160 | int is_affected, int insert_size) | |
1da177e4 | 161 | { |
bd4c625c | 162 | vi->vi_index = TYPE_DIRECT; |
bd4c625c | 163 | return 0; |
1da177e4 LT |
164 | } |
165 | ||
bd4c625c LT |
166 | static int direct_check_left(struct virtual_item *vi, int free, |
167 | int start_skip, int end_skip) | |
1da177e4 | 168 | { |
bd4c625c | 169 | int bytes; |
1da177e4 | 170 | |
bd4c625c LT |
171 | bytes = free - free % 8; |
172 | return bytes ? : -1; | |
1da177e4 LT |
173 | } |
174 | ||
bd4c625c | 175 | static int direct_check_right(struct virtual_item *vi, int free) |
1da177e4 | 176 | { |
bd4c625c | 177 | return direct_check_left(vi, free, 0, 0); |
1da177e4 LT |
178 | } |
179 | ||
bd4c625c | 180 | static int direct_part_size(struct virtual_item *vi, int first, int count) |
1da177e4 | 181 | { |
bd4c625c | 182 | return count; |
1da177e4 LT |
183 | } |
184 | ||
bd4c625c | 185 | static int direct_unit_num(struct virtual_item *vi) |
1da177e4 | 186 | { |
bd4c625c | 187 | return vi->vi_item_len - IH_SIZE; |
1da177e4 LT |
188 | } |
189 | ||
bd4c625c | 190 | static void direct_print_vi(struct virtual_item *vi) |
1da177e4 | 191 | { |
45b03d5e JM |
192 | reiserfs_warning(NULL, "reiserfs-16101", |
193 | "DIRECT, index %d, type 0x%x, %h", | |
bd4c625c | 194 | vi->vi_index, vi->vi_type, vi->vi_ih); |
1da177e4 LT |
195 | } |
196 | ||
197 | static struct item_operations direct_ops = { | |
bd4c625c LT |
198 | .bytes_number = direct_bytes_number, |
199 | .decrement_key = direct_decrement_key, | |
200 | .is_left_mergeable = direct_is_left_mergeable, | |
201 | .print_item = direct_print_item, | |
202 | .check_item = direct_check_item, | |
203 | ||
204 | .create_vi = direct_create_vi, | |
205 | .check_left = direct_check_left, | |
206 | .check_right = direct_check_right, | |
207 | .part_size = direct_part_size, | |
208 | .unit_num = direct_unit_num, | |
209 | .print_vi = direct_print_vi | |
1da177e4 LT |
210 | }; |
211 | ||
098297b2 | 212 | /* indirect item functions */ |
bd4c625c | 213 | static int indirect_bytes_number(struct item_head *ih, int block_size) |
1da177e4 | 214 | { |
098297b2 | 215 | return ih_item_len(ih) / UNFM_P_SIZE * block_size; |
1da177e4 LT |
216 | } |
217 | ||
098297b2 | 218 | /* decrease offset, if it becomes 0, change type to stat data */ |
bd4c625c | 219 | static void indirect_decrement_key(struct cpu_key *key) |
1da177e4 | 220 | { |
bd4c625c LT |
221 | cpu_key_k_offset_dec(key); |
222 | if (cpu_key_k_offset(key) == 0) | |
223 | set_cpu_key_k_type(key, TYPE_STAT_DATA); | |
1da177e4 LT |
224 | } |
225 | ||
098297b2 | 226 | /* if it is not first item of the body, then it is mergeable */ |
bd4c625c LT |
227 | static int indirect_is_left_mergeable(struct reiserfs_key *key, |
228 | unsigned long bsize) | |
1da177e4 | 229 | { |
bd4c625c LT |
230 | int version = le_key_version(key); |
231 | return (le_key_k_offset(version, key) != 1); | |
1da177e4 LT |
232 | } |
233 | ||
098297b2 | 234 | /* printing of indirect item */ |
bd4c625c | 235 | static void start_new_sequence(__u32 * start, int *len, __u32 new) |
1da177e4 | 236 | { |
bd4c625c LT |
237 | *start = new; |
238 | *len = 1; | |
1da177e4 LT |
239 | } |
240 | ||
bd4c625c | 241 | static int sequence_finished(__u32 start, int *len, __u32 new) |
1da177e4 | 242 | { |
bd4c625c LT |
243 | if (start == INT_MAX) |
244 | return 1; | |
1da177e4 | 245 | |
bd4c625c LT |
246 | if (start == 0 && new == 0) { |
247 | (*len)++; | |
248 | return 0; | |
249 | } | |
250 | if (start != 0 && (start + *len) == new) { | |
251 | (*len)++; | |
252 | return 0; | |
253 | } | |
254 | return 1; | |
1da177e4 LT |
255 | } |
256 | ||
bd4c625c | 257 | static void print_sequence(__u32 start, int len) |
1da177e4 | 258 | { |
bd4c625c LT |
259 | if (start == INT_MAX) |
260 | return; | |
1da177e4 | 261 | |
bd4c625c LT |
262 | if (len == 1) |
263 | printk(" %d", start); | |
264 | else | |
265 | printk(" %d(%d)", start, len); | |
1da177e4 LT |
266 | } |
267 | ||
bd4c625c | 268 | static void indirect_print_item(struct item_head *ih, char *item) |
1da177e4 | 269 | { |
bd4c625c LT |
270 | int j; |
271 | __le32 *unp; | |
272 | __u32 prev = INT_MAX; | |
d5ee4ea8 | 273 | int num = 0; |
1da177e4 | 274 | |
bd4c625c | 275 | unp = (__le32 *) item; |
1da177e4 | 276 | |
bd4c625c | 277 | if (ih_item_len(ih) % UNFM_P_SIZE) |
45b03d5e | 278 | reiserfs_warning(NULL, "reiserfs-16102", "invalid item len"); |
1da177e4 | 279 | |
bd4c625c LT |
280 | printk("%d pointers\n[ ", (int)I_UNFM_NUM(ih)); |
281 | for (j = 0; j < I_UNFM_NUM(ih); j++) { | |
282 | if (sequence_finished(prev, &num, get_block_num(unp, j))) { | |
283 | print_sequence(prev, num); | |
284 | start_new_sequence(&prev, &num, get_block_num(unp, j)); | |
285 | } | |
1da177e4 | 286 | } |
bd4c625c LT |
287 | print_sequence(prev, num); |
288 | printk("]\n"); | |
1da177e4 LT |
289 | } |
290 | ||
bd4c625c | 291 | static void indirect_check_item(struct item_head *ih, char *item) |
1da177e4 | 292 | { |
098297b2 | 293 | /* unused */ |
1da177e4 LT |
294 | } |
295 | ||
bd4c625c LT |
296 | static int indirect_create_vi(struct virtual_node *vn, |
297 | struct virtual_item *vi, | |
298 | int is_affected, int insert_size) | |
1da177e4 | 299 | { |
bd4c625c | 300 | vi->vi_index = TYPE_INDIRECT; |
bd4c625c | 301 | return 0; |
1da177e4 LT |
302 | } |
303 | ||
bd4c625c LT |
304 | static int indirect_check_left(struct virtual_item *vi, int free, |
305 | int start_skip, int end_skip) | |
1da177e4 | 306 | { |
bd4c625c | 307 | int bytes; |
1da177e4 | 308 | |
bd4c625c LT |
309 | bytes = free - free % UNFM_P_SIZE; |
310 | return bytes ? : -1; | |
1da177e4 LT |
311 | } |
312 | ||
bd4c625c | 313 | static int indirect_check_right(struct virtual_item *vi, int free) |
1da177e4 | 314 | { |
bd4c625c | 315 | return indirect_check_left(vi, free, 0, 0); |
1da177e4 LT |
316 | } |
317 | ||
098297b2 JM |
318 | /* |
319 | * return size in bytes of 'units' units. If first == 0 - calculate | |
320 | * from the head (left), otherwise - from tail (right) | |
321 | */ | |
bd4c625c | 322 | static int indirect_part_size(struct virtual_item *vi, int first, int units) |
1da177e4 | 323 | { |
098297b2 | 324 | /* unit of indirect item is byte (yet) */ |
bd4c625c | 325 | return units; |
1da177e4 LT |
326 | } |
327 | ||
bd4c625c | 328 | static int indirect_unit_num(struct virtual_item *vi) |
1da177e4 | 329 | { |
098297b2 | 330 | /* unit of indirect item is byte (yet) */ |
bd4c625c | 331 | return vi->vi_item_len - IH_SIZE; |
1da177e4 LT |
332 | } |
333 | ||
bd4c625c | 334 | static void indirect_print_vi(struct virtual_item *vi) |
1da177e4 | 335 | { |
45b03d5e JM |
336 | reiserfs_warning(NULL, "reiserfs-16103", |
337 | "INDIRECT, index %d, type 0x%x, %h", | |
bd4c625c | 338 | vi->vi_index, vi->vi_type, vi->vi_ih); |
1da177e4 LT |
339 | } |
340 | ||
341 | static struct item_operations indirect_ops = { | |
bd4c625c LT |
342 | .bytes_number = indirect_bytes_number, |
343 | .decrement_key = indirect_decrement_key, | |
344 | .is_left_mergeable = indirect_is_left_mergeable, | |
345 | .print_item = indirect_print_item, | |
346 | .check_item = indirect_check_item, | |
347 | ||
348 | .create_vi = indirect_create_vi, | |
349 | .check_left = indirect_check_left, | |
350 | .check_right = indirect_check_right, | |
351 | .part_size = indirect_part_size, | |
352 | .unit_num = indirect_unit_num, | |
353 | .print_vi = indirect_print_vi | |
1da177e4 LT |
354 | }; |
355 | ||
098297b2 | 356 | /* direntry functions */ |
bd4c625c | 357 | static int direntry_bytes_number(struct item_head *ih, int block_size) |
1da177e4 | 358 | { |
45b03d5e | 359 | reiserfs_warning(NULL, "vs-16090", |
bd4c625c LT |
360 | "bytes number is asked for direntry"); |
361 | return 0; | |
1da177e4 LT |
362 | } |
363 | ||
bd4c625c | 364 | static void direntry_decrement_key(struct cpu_key *key) |
1da177e4 | 365 | { |
bd4c625c LT |
366 | cpu_key_k_offset_dec(key); |
367 | if (cpu_key_k_offset(key) == 0) | |
368 | set_cpu_key_k_type(key, TYPE_STAT_DATA); | |
1da177e4 LT |
369 | } |
370 | ||
bd4c625c LT |
371 | static int direntry_is_left_mergeable(struct reiserfs_key *key, |
372 | unsigned long bsize) | |
1da177e4 | 373 | { |
bd4c625c LT |
374 | if (le32_to_cpu(key->u.k_offset_v1.k_offset) == DOT_OFFSET) |
375 | return 0; | |
376 | return 1; | |
1da177e4 | 377 | |
bd4c625c | 378 | } |
1da177e4 | 379 | |
bd4c625c LT |
380 | static void direntry_print_item(struct item_head *ih, char *item) |
381 | { | |
382 | int i; | |
383 | int namelen; | |
384 | struct reiserfs_de_head *deh; | |
385 | char *name; | |
386 | static char namebuf[80]; | |
387 | ||
388 | printk("\n # %-15s%-30s%-15s%-15s%-15s\n", "Name", | |
389 | "Key of pointed object", "Hash", "Gen number", "Status"); | |
390 | ||
391 | deh = (struct reiserfs_de_head *)item; | |
392 | ||
4cf5f7ad | 393 | for (i = 0; i < ih_entry_count(ih); i++, deh++) { |
bd4c625c LT |
394 | namelen = |
395 | (i ? (deh_location(deh - 1)) : ih_item_len(ih)) - | |
396 | deh_location(deh); | |
397 | name = item + deh_location(deh); | |
398 | if (name[namelen - 1] == 0) | |
399 | namelen = strlen(name); | |
400 | namebuf[0] = '"'; | |
401 | if (namelen > sizeof(namebuf) - 3) { | |
402 | strncpy(namebuf + 1, name, sizeof(namebuf) - 3); | |
403 | namebuf[sizeof(namebuf) - 2] = '"'; | |
404 | namebuf[sizeof(namebuf) - 1] = 0; | |
405 | } else { | |
406 | memcpy(namebuf + 1, name, namelen); | |
407 | namebuf[namelen + 1] = '"'; | |
408 | namebuf[namelen + 2] = 0; | |
409 | } | |
410 | ||
53872ed0 | 411 | printk("%d: %-15s%-15d%-15d%-15lld%-15lld(%s)\n", |
bd4c625c LT |
412 | i, namebuf, |
413 | deh_dir_id(deh), deh_objectid(deh), | |
414 | GET_HASH_VALUE(deh_offset(deh)), | |
415 | GET_GENERATION_NUMBER((deh_offset(deh))), | |
416 | (de_hidden(deh)) ? "HIDDEN" : "VISIBLE"); | |
1da177e4 | 417 | } |
1da177e4 LT |
418 | } |
419 | ||
bd4c625c | 420 | static void direntry_check_item(struct item_head *ih, char *item) |
1da177e4 | 421 | { |
bd4c625c LT |
422 | int i; |
423 | struct reiserfs_de_head *deh; | |
1da177e4 | 424 | |
098297b2 | 425 | /* unused */ |
bd4c625c | 426 | deh = (struct reiserfs_de_head *)item; |
4cf5f7ad | 427 | for (i = 0; i < ih_entry_count(ih); i++, deh++) { |
bd4c625c LT |
428 | ; |
429 | } | |
1da177e4 LT |
430 | } |
431 | ||
1da177e4 LT |
432 | #define DIRENTRY_VI_FIRST_DIRENTRY_ITEM 1 |
433 | ||
434 | /* | |
435 | * function returns old entry number in directory item in real node | |
098297b2 JM |
436 | * using new entry number in virtual item in virtual node |
437 | */ | |
bd4c625c LT |
438 | static inline int old_entry_num(int is_affected, int virtual_entry_num, |
439 | int pos_in_item, int mode) | |
1da177e4 | 440 | { |
bd4c625c LT |
441 | if (mode == M_INSERT || mode == M_DELETE) |
442 | return virtual_entry_num; | |
1da177e4 | 443 | |
bd4c625c LT |
444 | if (!is_affected) |
445 | /* cut or paste is applied to another item */ | |
446 | return virtual_entry_num; | |
1da177e4 | 447 | |
bd4c625c LT |
448 | if (virtual_entry_num < pos_in_item) |
449 | return virtual_entry_num; | |
1da177e4 | 450 | |
bd4c625c LT |
451 | if (mode == M_CUT) |
452 | return virtual_entry_num + 1; | |
1da177e4 | 453 | |
bd4c625c LT |
454 | RFALSE(mode != M_PASTE || virtual_entry_num == 0, |
455 | "vs-8015: old_entry_num: mode must be M_PASTE (mode = \'%c\'", | |
456 | mode); | |
1da177e4 | 457 | |
bd4c625c LT |
458 | return virtual_entry_num - 1; |
459 | } | |
1da177e4 | 460 | |
098297b2 JM |
461 | /* |
462 | * Create an array of sizes of directory entries for virtual | |
463 | * item. Return space used by an item. FIXME: no control over | |
464 | * consuming of space used by this item handler | |
465 | */ | |
bd4c625c LT |
466 | static int direntry_create_vi(struct virtual_node *vn, |
467 | struct virtual_item *vi, | |
468 | int is_affected, int insert_size) | |
469 | { | |
470 | struct direntry_uarea *dir_u = vi->vi_uarea; | |
471 | int i, j; | |
472 | int size = sizeof(struct direntry_uarea); | |
473 | struct reiserfs_de_head *deh; | |
1da177e4 | 474 | |
bd4c625c LT |
475 | vi->vi_index = TYPE_DIRENTRY; |
476 | ||
14a61442 | 477 | BUG_ON(!(vi->vi_ih) || !vi->vi_item); |
bd4c625c LT |
478 | |
479 | dir_u->flags = 0; | |
480 | if (le_ih_k_offset(vi->vi_ih) == DOT_OFFSET) | |
481 | dir_u->flags |= DIRENTRY_VI_FIRST_DIRENTRY_ITEM; | |
482 | ||
483 | deh = (struct reiserfs_de_head *)(vi->vi_item); | |
484 | ||
485 | /* virtual directory item have this amount of entry after */ | |
486 | dir_u->entry_count = ih_entry_count(vi->vi_ih) + | |
487 | ((is_affected) ? ((vn->vn_mode == M_CUT) ? -1 : | |
488 | (vn->vn_mode == M_PASTE ? 1 : 0)) : 0); | |
489 | ||
490 | for (i = 0; i < dir_u->entry_count; i++) { | |
491 | j = old_entry_num(is_affected, i, vn->vn_pos_in_item, | |
492 | vn->vn_mode); | |
493 | dir_u->entry_sizes[i] = | |
a228bf8f JM |
494 | (j ? deh_location(&deh[j - 1]) : ih_item_len(vi->vi_ih)) - |
495 | deh_location(&deh[j]) + DEH_SIZE; | |
bd4c625c LT |
496 | } |
497 | ||
498 | size += (dir_u->entry_count * sizeof(short)); | |
499 | ||
500 | /* set size of pasted entry */ | |
501 | if (is_affected && vn->vn_mode == M_PASTE) | |
502 | dir_u->entry_sizes[vn->vn_pos_in_item] = insert_size; | |
1da177e4 LT |
503 | |
504 | #ifdef CONFIG_REISERFS_CHECK | |
bd4c625c LT |
505 | /* compare total size of entries with item length */ |
506 | { | |
507 | int k, l; | |
508 | ||
509 | l = 0; | |
510 | for (k = 0; k < dir_u->entry_count; k++) | |
511 | l += dir_u->entry_sizes[k]; | |
512 | ||
513 | if (l + IH_SIZE != vi->vi_item_len + | |
514 | ((is_affected | |
515 | && (vn->vn_mode == M_PASTE | |
516 | || vn->vn_mode == M_CUT)) ? insert_size : 0)) { | |
c3a9c210 JM |
517 | reiserfs_panic(NULL, "vs-8025", "(mode==%c, " |
518 | "insert_size==%d), invalid length of " | |
519 | "directory item", | |
bd4c625c LT |
520 | vn->vn_mode, insert_size); |
521 | } | |
1da177e4 | 522 | } |
1da177e4 LT |
523 | #endif |
524 | ||
bd4c625c | 525 | return size; |
1da177e4 LT |
526 | |
527 | } | |
528 | ||
098297b2 JM |
529 | /* |
530 | * return number of entries which may fit into specified amount of | |
531 | * free space, or -1 if free space is not enough even for 1 entry | |
532 | */ | |
bd4c625c LT |
533 | static int direntry_check_left(struct virtual_item *vi, int free, |
534 | int start_skip, int end_skip) | |
1da177e4 | 535 | { |
bd4c625c LT |
536 | int i; |
537 | int entries = 0; | |
538 | struct direntry_uarea *dir_u = vi->vi_uarea; | |
1da177e4 | 539 | |
bd4c625c | 540 | for (i = start_skip; i < dir_u->entry_count - end_skip; i++) { |
098297b2 | 541 | /* i-th entry doesn't fit into the remaining free space */ |
bd4c625c | 542 | if (dir_u->entry_sizes[i] > free) |
bd4c625c | 543 | break; |
1da177e4 | 544 | |
bd4c625c LT |
545 | free -= dir_u->entry_sizes[i]; |
546 | entries++; | |
547 | } | |
1da177e4 | 548 | |
bd4c625c | 549 | if (entries == dir_u->entry_count) { |
c3a9c210 JM |
550 | reiserfs_panic(NULL, "item_ops-1", |
551 | "free space %d, entry_count %d", free, | |
bd4c625c LT |
552 | dir_u->entry_count); |
553 | } | |
1da177e4 | 554 | |
bd4c625c LT |
555 | /* "." and ".." can not be separated from each other */ |
556 | if (start_skip == 0 && (dir_u->flags & DIRENTRY_VI_FIRST_DIRENTRY_ITEM) | |
557 | && entries < 2) | |
558 | entries = 0; | |
1da177e4 | 559 | |
bd4c625c LT |
560 | return entries ? : -1; |
561 | } | |
562 | ||
563 | static int direntry_check_right(struct virtual_item *vi, int free) | |
1da177e4 | 564 | { |
bd4c625c LT |
565 | int i; |
566 | int entries = 0; | |
567 | struct direntry_uarea *dir_u = vi->vi_uarea; | |
1da177e4 | 568 | |
bd4c625c | 569 | for (i = dir_u->entry_count - 1; i >= 0; i--) { |
098297b2 | 570 | /* i-th entry doesn't fit into the remaining free space */ |
bd4c625c | 571 | if (dir_u->entry_sizes[i] > free) |
bd4c625c | 572 | break; |
1da177e4 | 573 | |
bd4c625c LT |
574 | free -= dir_u->entry_sizes[i]; |
575 | entries++; | |
576 | } | |
14a61442 | 577 | BUG_ON(entries == dir_u->entry_count); |
1da177e4 | 578 | |
bd4c625c LT |
579 | /* "." and ".." can not be separated from each other */ |
580 | if ((dir_u->flags & DIRENTRY_VI_FIRST_DIRENTRY_ITEM) | |
581 | && entries > dir_u->entry_count - 2) | |
582 | entries = dir_u->entry_count - 2; | |
583 | ||
584 | return entries ? : -1; | |
585 | } | |
1da177e4 LT |
586 | |
587 | /* sum of entry sizes between from-th and to-th entries including both edges */ | |
bd4c625c | 588 | static int direntry_part_size(struct virtual_item *vi, int first, int count) |
1da177e4 | 589 | { |
bd4c625c LT |
590 | int i, retval; |
591 | int from, to; | |
592 | struct direntry_uarea *dir_u = vi->vi_uarea; | |
1da177e4 | 593 | |
bd4c625c LT |
594 | retval = 0; |
595 | if (first == 0) | |
596 | from = 0; | |
597 | else | |
598 | from = dir_u->entry_count - count; | |
599 | to = from + count - 1; | |
1da177e4 | 600 | |
bd4c625c LT |
601 | for (i = from; i <= to; i++) |
602 | retval += dir_u->entry_sizes[i]; | |
1da177e4 | 603 | |
bd4c625c | 604 | return retval; |
1da177e4 LT |
605 | } |
606 | ||
bd4c625c LT |
607 | static int direntry_unit_num(struct virtual_item *vi) |
608 | { | |
609 | struct direntry_uarea *dir_u = vi->vi_uarea; | |
1da177e4 | 610 | |
bd4c625c LT |
611 | return dir_u->entry_count; |
612 | } | |
1da177e4 | 613 | |
bd4c625c | 614 | static void direntry_print_vi(struct virtual_item *vi) |
1da177e4 | 615 | { |
bd4c625c LT |
616 | int i; |
617 | struct direntry_uarea *dir_u = vi->vi_uarea; | |
1da177e4 | 618 | |
45b03d5e JM |
619 | reiserfs_warning(NULL, "reiserfs-16104", |
620 | "DIRENTRY, index %d, type 0x%x, %h, flags 0x%x", | |
bd4c625c LT |
621 | vi->vi_index, vi->vi_type, vi->vi_ih, dir_u->flags); |
622 | printk("%d entries: ", dir_u->entry_count); | |
623 | for (i = 0; i < dir_u->entry_count; i++) | |
624 | printk("%d ", dir_u->entry_sizes[i]); | |
625 | printk("\n"); | |
1da177e4 LT |
626 | } |
627 | ||
628 | static struct item_operations direntry_ops = { | |
bd4c625c LT |
629 | .bytes_number = direntry_bytes_number, |
630 | .decrement_key = direntry_decrement_key, | |
631 | .is_left_mergeable = direntry_is_left_mergeable, | |
632 | .print_item = direntry_print_item, | |
633 | .check_item = direntry_check_item, | |
634 | ||
635 | .create_vi = direntry_create_vi, | |
636 | .check_left = direntry_check_left, | |
637 | .check_right = direntry_check_right, | |
638 | .part_size = direntry_part_size, | |
639 | .unit_num = direntry_unit_num, | |
640 | .print_vi = direntry_print_vi | |
1da177e4 LT |
641 | }; |
642 | ||
098297b2 | 643 | /* Error catching functions to catch errors caused by incorrect item types. */ |
bd4c625c | 644 | static int errcatch_bytes_number(struct item_head *ih, int block_size) |
1da177e4 | 645 | { |
45b03d5e JM |
646 | reiserfs_warning(NULL, "green-16001", |
647 | "Invalid item type observed, run fsck ASAP"); | |
bd4c625c | 648 | return 0; |
1da177e4 LT |
649 | } |
650 | ||
bd4c625c | 651 | static void errcatch_decrement_key(struct cpu_key *key) |
1da177e4 | 652 | { |
45b03d5e JM |
653 | reiserfs_warning(NULL, "green-16002", |
654 | "Invalid item type observed, run fsck ASAP"); | |
1da177e4 LT |
655 | } |
656 | ||
bd4c625c LT |
657 | static int errcatch_is_left_mergeable(struct reiserfs_key *key, |
658 | unsigned long bsize) | |
1da177e4 | 659 | { |
45b03d5e JM |
660 | reiserfs_warning(NULL, "green-16003", |
661 | "Invalid item type observed, run fsck ASAP"); | |
bd4c625c | 662 | return 0; |
1da177e4 LT |
663 | } |
664 | ||
bd4c625c | 665 | static void errcatch_print_item(struct item_head *ih, char *item) |
1da177e4 | 666 | { |
45b03d5e JM |
667 | reiserfs_warning(NULL, "green-16004", |
668 | "Invalid item type observed, run fsck ASAP"); | |
1da177e4 LT |
669 | } |
670 | ||
bd4c625c | 671 | static void errcatch_check_item(struct item_head *ih, char *item) |
1da177e4 | 672 | { |
45b03d5e JM |
673 | reiserfs_warning(NULL, "green-16005", |
674 | "Invalid item type observed, run fsck ASAP"); | |
1da177e4 LT |
675 | } |
676 | ||
bd4c625c LT |
677 | static int errcatch_create_vi(struct virtual_node *vn, |
678 | struct virtual_item *vi, | |
679 | int is_affected, int insert_size) | |
1da177e4 | 680 | { |
45b03d5e JM |
681 | reiserfs_warning(NULL, "green-16006", |
682 | "Invalid item type observed, run fsck ASAP"); | |
098297b2 JM |
683 | /* |
684 | * We might return -1 here as well, but it won't help as | |
685 | * create_virtual_node() from where this operation is called | |
686 | * from is of return type void. | |
687 | */ | |
688 | return 0; | |
1da177e4 LT |
689 | } |
690 | ||
bd4c625c LT |
691 | static int errcatch_check_left(struct virtual_item *vi, int free, |
692 | int start_skip, int end_skip) | |
1da177e4 | 693 | { |
45b03d5e JM |
694 | reiserfs_warning(NULL, "green-16007", |
695 | "Invalid item type observed, run fsck ASAP"); | |
bd4c625c | 696 | return -1; |
1da177e4 LT |
697 | } |
698 | ||
bd4c625c | 699 | static int errcatch_check_right(struct virtual_item *vi, int free) |
1da177e4 | 700 | { |
45b03d5e JM |
701 | reiserfs_warning(NULL, "green-16008", |
702 | "Invalid item type observed, run fsck ASAP"); | |
bd4c625c | 703 | return -1; |
1da177e4 LT |
704 | } |
705 | ||
bd4c625c | 706 | static int errcatch_part_size(struct virtual_item *vi, int first, int count) |
1da177e4 | 707 | { |
45b03d5e JM |
708 | reiserfs_warning(NULL, "green-16009", |
709 | "Invalid item type observed, run fsck ASAP"); | |
bd4c625c | 710 | return 0; |
1da177e4 LT |
711 | } |
712 | ||
bd4c625c | 713 | static int errcatch_unit_num(struct virtual_item *vi) |
1da177e4 | 714 | { |
45b03d5e JM |
715 | reiserfs_warning(NULL, "green-16010", |
716 | "Invalid item type observed, run fsck ASAP"); | |
bd4c625c | 717 | return 0; |
1da177e4 LT |
718 | } |
719 | ||
bd4c625c | 720 | static void errcatch_print_vi(struct virtual_item *vi) |
1da177e4 | 721 | { |
45b03d5e JM |
722 | reiserfs_warning(NULL, "green-16011", |
723 | "Invalid item type observed, run fsck ASAP"); | |
1da177e4 LT |
724 | } |
725 | ||
726 | static struct item_operations errcatch_ops = { | |
bd4c625c LT |
727 | errcatch_bytes_number, |
728 | errcatch_decrement_key, | |
729 | errcatch_is_left_mergeable, | |
730 | errcatch_print_item, | |
731 | errcatch_check_item, | |
732 | ||
733 | errcatch_create_vi, | |
734 | errcatch_check_left, | |
735 | errcatch_check_right, | |
736 | errcatch_part_size, | |
737 | errcatch_unit_num, | |
738 | errcatch_print_vi | |
1da177e4 LT |
739 | }; |
740 | ||
1da177e4 | 741 | #if ! (TYPE_STAT_DATA == 0 && TYPE_INDIRECT == 1 && TYPE_DIRECT == 2 && TYPE_DIRENTRY == 3) |
7fa94c88 | 742 | #error Item types must use disk-format assigned values. |
1da177e4 LT |
743 | #endif |
744 | ||
bd4c625c LT |
745 | struct item_operations *item_ops[TYPE_ANY + 1] = { |
746 | &stat_data_ops, | |
747 | &indirect_ops, | |
748 | &direct_ops, | |
749 | &direntry_ops, | |
750 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, | |
751 | &errcatch_ops /* This is to catch errors with invalid type (15th entry for TYPE_ANY) */ | |
1da177e4 | 752 | }; |