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OMAPDSS: VENC: fix NULL pointer dereference in DSS2 VENC sysfs debug attr on OMAP4
[zen-stable.git] / fs / reiserfs / procfs.c
blob7a9981196c1cda061bf086610b5d71ef17121949
1 /* -*- linux-c -*- */
2
3 /* fs/reiserfs/procfs.c */
4
5 /*
6 * Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README
7 */
8
9 /* proc info support a la one created by Sizif@Botik.RU for PGC */
10
11 #include <linux/module.h>
12 #include <linux/time.h>
13 #include <linux/seq_file.h>
14 #include <asm/uaccess.h>
15 #include <linux/reiserfs_fs.h>
16 #include <linux/reiserfs_fs_sb.h>
17 #include <linux/init.h>
18 #include <linux/proc_fs.h>
19
20 /*
21 * LOCKING:
22 *
23 * We rely on new Alexander Viro's super-block locking.
24 *
25 */
26
27 static int show_version(struct seq_file *m, struct super_block *sb)
28 {
29 char *format;
30
31 if (REISERFS_SB(sb)->s_properties & (1 << REISERFS_3_6)) {
32 format = "3.6";
33 } else if (REISERFS_SB(sb)->s_properties & (1 << REISERFS_3_5)) {
34 format = "3.5";
35 } else {
36 format = "unknown";
37 }
38
39 seq_printf(m, "%s format\twith checks %s\n", format,
40 #if defined( CONFIG_REISERFS_CHECK )
41 "on"
42 #else
43 "off"
44 #endif
45 );
46 return 0;
47 }
48
49 #define SF( x ) ( r -> x )
50 #define SFP( x ) SF( s_proc_info_data.x )
51 #define SFPL( x ) SFP( x[ level ] )
52 #define SFPF( x ) SFP( scan_bitmap.x )
53 #define SFPJ( x ) SFP( journal.x )
54
55 #define D2C( x ) le16_to_cpu( x )
56 #define D4C( x ) le32_to_cpu( x )
57 #define DF( x ) D2C( rs -> s_v1.x )
58 #define DFL( x ) D4C( rs -> s_v1.x )
59
60 #define objectid_map( s, rs ) (old_format_only (s) ? \
61 (__le32 *)((struct reiserfs_super_block_v1 *)rs + 1) : \
62 (__le32 *)(rs + 1))
63 #define MAP( i ) D4C( objectid_map( sb, rs )[ i ] )
64
65 #define DJF( x ) le32_to_cpu( rs -> x )
66 #define DJV( x ) le32_to_cpu( s_v1 -> x )
67 #define DJP( x ) le32_to_cpu( jp -> x )
68 #define JF( x ) ( r -> s_journal -> x )
69
70 static int show_super(struct seq_file *m, struct super_block *sb)
71 {
72 struct reiserfs_sb_info *r = REISERFS_SB(sb);
73
74 seq_printf(m, "state: \t%s\n"
75 "mount options: \t%s%s%s%s%s%s%s%s%s%s%s\n"
76 "gen. counter: \t%i\n"
77 "s_disk_reads: \t%i\n"
78 "s_disk_writes: \t%i\n"
79 "s_fix_nodes: \t%i\n"
80 "s_do_balance: \t%i\n"
81 "s_unneeded_left_neighbor: \t%i\n"
82 "s_good_search_by_key_reada: \t%i\n"
83 "s_bmaps: \t%i\n"
84 "s_bmaps_without_search: \t%i\n"
85 "s_direct2indirect: \t%i\n"
86 "s_indirect2direct: \t%i\n"
87 "\n"
88 "max_hash_collisions: \t%i\n"
89 "breads: \t%lu\n"
90 "bread_misses: \t%lu\n"
91 "search_by_key: \t%lu\n"
92 "search_by_key_fs_changed: \t%lu\n"
93 "search_by_key_restarted: \t%lu\n"
94 "insert_item_restarted: \t%lu\n"
95 "paste_into_item_restarted: \t%lu\n"
96 "cut_from_item_restarted: \t%lu\n"
97 "delete_solid_item_restarted: \t%lu\n"
98 "delete_item_restarted: \t%lu\n"
99 "leaked_oid: \t%lu\n"
100 "leaves_removable: \t%lu\n",
101 SF(s_mount_state) == REISERFS_VALID_FS ?
102 "REISERFS_VALID_FS" : "REISERFS_ERROR_FS",
103 reiserfs_r5_hash(sb) ? "FORCE_R5 " : "",
104 reiserfs_rupasov_hash(sb) ? "FORCE_RUPASOV " : "",
105 reiserfs_tea_hash(sb) ? "FORCE_TEA " : "",
106 reiserfs_hash_detect(sb) ? "DETECT_HASH " : "",
107 reiserfs_no_border(sb) ? "NO_BORDER " : "BORDER ",
108 reiserfs_no_unhashed_relocation(sb) ?
109 "NO_UNHASHED_RELOCATION " : "",
110 reiserfs_hashed_relocation(sb) ? "UNHASHED_RELOCATION " : "",
111 reiserfs_test4(sb) ? "TEST4 " : "",
112 have_large_tails(sb) ? "TAILS " : have_small_tails(sb) ?
113 "SMALL_TAILS " : "NO_TAILS ",
114 replay_only(sb) ? "REPLAY_ONLY " : "",
115 convert_reiserfs(sb) ? "CONV " : "",
116 atomic_read(&r->s_generation_counter),
117 SF(s_disk_reads), SF(s_disk_writes), SF(s_fix_nodes),
118 SF(s_do_balance), SF(s_unneeded_left_neighbor),
119 SF(s_good_search_by_key_reada), SF(s_bmaps),
120 SF(s_bmaps_without_search), SF(s_direct2indirect),
121 SF(s_indirect2direct), SFP(max_hash_collisions), SFP(breads),
122 SFP(bread_miss), SFP(search_by_key),
123 SFP(search_by_key_fs_changed), SFP(search_by_key_restarted),
124 SFP(insert_item_restarted), SFP(paste_into_item_restarted),
125 SFP(cut_from_item_restarted),
126 SFP(delete_solid_item_restarted), SFP(delete_item_restarted),
127 SFP(leaked_oid), SFP(leaves_removable));
128
129 return 0;
130 }
131
132 static int show_per_level(struct seq_file *m, struct super_block *sb)
133 {
134 struct reiserfs_sb_info *r = REISERFS_SB(sb);
135 int level;
136
137 seq_printf(m, "level\t"
138 " balances"
139 " [sbk: reads"
140 " fs_changed"
141 " restarted]"
142 " free space"
143 " items"
144 " can_remove"
145 " lnum"
146 " rnum"
147 " lbytes"
148 " rbytes"
149 " get_neig"
150 " get_neig_res" " need_l_neig" " need_r_neig" "\n");
151
152 for (level = 0; level < MAX_HEIGHT; ++level) {
153 seq_printf(m, "%i\t"
154 " %12lu"
155 " %12lu"
156 " %12lu"
157 " %12lu"
158 " %12lu"
159 " %12lu"
160 " %12lu"
161 " %12li"
162 " %12li"
163 " %12li"
164 " %12li"
165 " %12lu"
166 " %12lu"
167 " %12lu"
168 " %12lu"
169 "\n",
170 level,
171 SFPL(balance_at),
172 SFPL(sbk_read_at),
173 SFPL(sbk_fs_changed),
174 SFPL(sbk_restarted),
175 SFPL(free_at),
176 SFPL(items_at),
177 SFPL(can_node_be_removed),
178 SFPL(lnum),
179 SFPL(rnum),
180 SFPL(lbytes),
181 SFPL(rbytes),
182 SFPL(get_neighbors),
183 SFPL(get_neighbors_restart),
184 SFPL(need_l_neighbor), SFPL(need_r_neighbor)
185 );
186 }
187 return 0;
188 }
189
190 static int show_bitmap(struct seq_file *m, struct super_block *sb)
191 {
192 struct reiserfs_sb_info *r = REISERFS_SB(sb);
193
194 seq_printf(m, "free_block: %lu\n"
195 " scan_bitmap:"
196 " wait"
197 " bmap"
198 " retry"
199 " stolen"
200 " journal_hint"
201 "journal_nohint"
202 "\n"
203 " %14lu"
204 " %14lu"
205 " %14lu"
206 " %14lu"
207 " %14lu"
208 " %14lu"
209 " %14lu"
210 "\n",
211 SFP(free_block),
212 SFPF(call),
213 SFPF(wait),
214 SFPF(bmap),
215 SFPF(retry),
216 SFPF(stolen),
217 SFPF(in_journal_hint), SFPF(in_journal_nohint));
218
219 return 0;
220 }
221
222 static int show_on_disk_super(struct seq_file *m, struct super_block *sb)
223 {
224 struct reiserfs_sb_info *sb_info = REISERFS_SB(sb);
225 struct reiserfs_super_block *rs = sb_info->s_rs;
226 int hash_code = DFL(s_hash_function_code);
227 __u32 flags = DJF(s_flags);
228
229 seq_printf(m, "block_count: \t%i\n"
230 "free_blocks: \t%i\n"
231 "root_block: \t%i\n"
232 "blocksize: \t%i\n"
233 "oid_maxsize: \t%i\n"
234 "oid_cursize: \t%i\n"
235 "umount_state: \t%i\n"
236 "magic: \t%10.10s\n"
237 "fs_state: \t%i\n"
238 "hash: \t%s\n"
239 "tree_height: \t%i\n"
240 "bmap_nr: \t%i\n"
241 "version: \t%i\n"
242 "flags: \t%x[%s]\n"
243 "reserved_for_journal: \t%i\n",
244 DFL(s_block_count),
245 DFL(s_free_blocks),
246 DFL(s_root_block),
247 DF(s_blocksize),
248 DF(s_oid_maxsize),
249 DF(s_oid_cursize),
250 DF(s_umount_state),
251 rs->s_v1.s_magic,
252 DF(s_fs_state),
253 hash_code == TEA_HASH ? "tea" :
254 (hash_code == YURA_HASH) ? "rupasov" :
255 (hash_code == R5_HASH) ? "r5" :
256 (hash_code == UNSET_HASH) ? "unset" : "unknown",
257 DF(s_tree_height),
258 DF(s_bmap_nr),
259 DF(s_version), flags, (flags & reiserfs_attrs_cleared)
260 ? "attrs_cleared" : "", DF(s_reserved_for_journal));
261
262 return 0;
263 }
264
265 static int show_oidmap(struct seq_file *m, struct super_block *sb)
266 {
267 struct reiserfs_sb_info *sb_info = REISERFS_SB(sb);
268 struct reiserfs_super_block *rs = sb_info->s_rs;
269 unsigned int mapsize = le16_to_cpu(rs->s_v1.s_oid_cursize);
270 unsigned long total_used = 0;
271 int i;
272
273 for (i = 0; i < mapsize; ++i) {
274 __u32 right;
275
276 right = (i == mapsize - 1) ? MAX_KEY_OBJECTID : MAP(i + 1);
277 seq_printf(m, "%s: [ %x .. %x )\n",
278 (i & 1) ? "free" : "used", MAP(i), right);
279 if (!(i & 1)) {
280 total_used += right - MAP(i);
281 }
282 }
283 #if defined( REISERFS_USE_OIDMAPF )
284 if (sb_info->oidmap.use_file && (sb_info->oidmap.mapf != NULL)) {
285 loff_t size = sb_info->oidmap.mapf->f_path.dentry->d_inode->i_size;
286 total_used += size / sizeof(reiserfs_oidinterval_d_t);
287 }
288 #endif
289 seq_printf(m, "total: \t%i [%i/%i] used: %lu [exact]\n",
290 mapsize,
291 mapsize, le16_to_cpu(rs->s_v1.s_oid_maxsize), total_used);
292 return 0;
293 }
294
295 static int show_journal(struct seq_file *m, struct super_block *sb)
296 {
297 struct reiserfs_sb_info *r = REISERFS_SB(sb);
298 struct reiserfs_super_block *rs = r->s_rs;
299 struct journal_params *jp = &rs->s_v1.s_journal;
300 char b[BDEVNAME_SIZE];
301
302 seq_printf(m, /* on-disk fields */
303 "jp_journal_1st_block: \t%i\n"
304 "jp_journal_dev: \t%s[%x]\n"
305 "jp_journal_size: \t%i\n"
306 "jp_journal_trans_max: \t%i\n"
307 "jp_journal_magic: \t%i\n"
308 "jp_journal_max_batch: \t%i\n"
309 "jp_journal_max_commit_age: \t%i\n"
310 "jp_journal_max_trans_age: \t%i\n"
311 /* incore fields */
312 "j_1st_reserved_block: \t%i\n"
313 "j_state: \t%li\n"
314 "j_trans_id: \t%u\n"
315 "j_mount_id: \t%lu\n"
316 "j_start: \t%lu\n"
317 "j_len: \t%lu\n"
318 "j_len_alloc: \t%lu\n"
319 "j_wcount: \t%i\n"
320 "j_bcount: \t%lu\n"
321 "j_first_unflushed_offset: \t%lu\n"
322 "j_last_flush_trans_id: \t%u\n"
323 "j_trans_start_time: \t%li\n"
324 "j_list_bitmap_index: \t%i\n"
325 "j_must_wait: \t%i\n"
326 "j_next_full_flush: \t%i\n"
327 "j_next_async_flush: \t%i\n"
328 "j_cnode_used: \t%i\n" "j_cnode_free: \t%i\n" "\n"
329 /* reiserfs_proc_info_data_t.journal fields */
330 "in_journal: \t%12lu\n"
331 "in_journal_bitmap: \t%12lu\n"
332 "in_journal_reusable: \t%12lu\n"
333 "lock_journal: \t%12lu\n"
334 "lock_journal_wait: \t%12lu\n"
335 "journal_begin: \t%12lu\n"
336 "journal_relock_writers: \t%12lu\n"
337 "journal_relock_wcount: \t%12lu\n"
338 "mark_dirty: \t%12lu\n"
339 "mark_dirty_already: \t%12lu\n"
340 "mark_dirty_notjournal: \t%12lu\n"
341 "restore_prepared: \t%12lu\n"
342 "prepare: \t%12lu\n"
343 "prepare_retry: \t%12lu\n",
344 DJP(jp_journal_1st_block),
345 bdevname(SB_JOURNAL(sb)->j_dev_bd, b),
346 DJP(jp_journal_dev),
347 DJP(jp_journal_size),
348 DJP(jp_journal_trans_max),
349 DJP(jp_journal_magic),
350 DJP(jp_journal_max_batch),
351 SB_JOURNAL(sb)->j_max_commit_age,
352 DJP(jp_journal_max_trans_age),
353 JF(j_1st_reserved_block),
354 JF(j_state),
355 JF(j_trans_id),
356 JF(j_mount_id),
357 JF(j_start),
358 JF(j_len),
359 JF(j_len_alloc),
360 atomic_read(&r->s_journal->j_wcount),
361 JF(j_bcount),
362 JF(j_first_unflushed_offset),
363 JF(j_last_flush_trans_id),
364 JF(j_trans_start_time),
365 JF(j_list_bitmap_index),
366 JF(j_must_wait),
367 JF(j_next_full_flush),
368 JF(j_next_async_flush),
369 JF(j_cnode_used),
370 JF(j_cnode_free),
371 SFPJ(in_journal),
372 SFPJ(in_journal_bitmap),
373 SFPJ(in_journal_reusable),
374 SFPJ(lock_journal),
375 SFPJ(lock_journal_wait),
376 SFPJ(journal_being),
377 SFPJ(journal_relock_writers),
378 SFPJ(journal_relock_wcount),
379 SFPJ(mark_dirty),
380 SFPJ(mark_dirty_already),
381 SFPJ(mark_dirty_notjournal),
382 SFPJ(restore_prepared), SFPJ(prepare), SFPJ(prepare_retry)
383 );
384 return 0;
385 }
386
387 /* iterator */
388 static int test_sb(struct super_block *sb, void *data)
389 {
390 return data == sb;
391 }
392
393 static int set_sb(struct super_block *sb, void *data)
394 {
395 return -ENOENT;
396 }
397
398 static void *r_start(struct seq_file *m, loff_t * pos)
399 {
400 struct proc_dir_entry *de = m->private;
401 struct super_block *s = de->parent->data;
402 loff_t l = *pos;
403
404 if (l)
405 return NULL;
406
407 if (IS_ERR(sget(&reiserfs_fs_type, test_sb, set_sb, s)))
408 return NULL;
409
410 up_write(&s->s_umount);
411 return s;
412 }
413
414 static void *r_next(struct seq_file *m, void *v, loff_t * pos)
415 {
416 ++*pos;
417 if (v)
418 deactivate_super(v);
419 return NULL;
420 }
421
422 static void r_stop(struct seq_file *m, void *v)
423 {
424 if (v)
425 deactivate_super(v);
426 }
427
428 static int r_show(struct seq_file *m, void *v)
429 {
430 struct proc_dir_entry *de = m->private;
431 int (*show) (struct seq_file *, struct super_block *) = de->data;
432 return show(m, v);
433 }
434
435 static const struct seq_operations r_ops = {
436 .start = r_start,
437 .next = r_next,
438 .stop = r_stop,
439 .show = r_show,
440 };
441
442 static int r_open(struct inode *inode, struct file *file)
443 {
444 int ret = seq_open(file, &r_ops);
445
446 if (!ret) {
447 struct seq_file *m = file->private_data;
448 m->private = PDE(inode);
449 }
450 return ret;
451 }
452
453 static const struct file_operations r_file_operations = {
454 .open = r_open,
455 .read = seq_read,
456 .llseek = seq_lseek,
457 .release = seq_release,
458 .owner = THIS_MODULE,
459 };
460
461 static struct proc_dir_entry *proc_info_root = NULL;
462 static const char proc_info_root_name[] = "fs/reiserfs";
463
464 static void add_file(struct super_block *sb, char *name,
465 int (*func) (struct seq_file *, struct super_block *))
466 {
467 proc_create_data(name, 0, REISERFS_SB(sb)->procdir,
468 &r_file_operations, func);
469 }
470
471 int reiserfs_proc_info_init(struct super_block *sb)
472 {
473 char b[BDEVNAME_SIZE];
474 char *s;
475
476 /* Some block devices use /'s */
477 strlcpy(b, reiserfs_bdevname(sb), BDEVNAME_SIZE);
478 s = strchr(b, '/');
479 if (s)
480 *s = '!';
481
482 spin_lock_init(&__PINFO(sb).lock);
483 REISERFS_SB(sb)->procdir = proc_mkdir(b, proc_info_root);
484 if (REISERFS_SB(sb)->procdir) {
485 REISERFS_SB(sb)->procdir->data = sb;
486 add_file(sb, "version", show_version);
487 add_file(sb, "super", show_super);
488 add_file(sb, "per-level", show_per_level);
489 add_file(sb, "bitmap", show_bitmap);
490 add_file(sb, "on-disk-super", show_on_disk_super);
491 add_file(sb, "oidmap", show_oidmap);
492 add_file(sb, "journal", show_journal);
493 return 0;
494 }
495 reiserfs_warning(sb, "cannot create /proc/%s/%s",
496 proc_info_root_name, b);
497 return 1;
498 }
499
500 int reiserfs_proc_info_done(struct super_block *sb)
501 {
502 struct proc_dir_entry *de = REISERFS_SB(sb)->procdir;
503 char b[BDEVNAME_SIZE];
504 char *s;
505
506 /* Some block devices use /'s */
507 strlcpy(b, reiserfs_bdevname(sb), BDEVNAME_SIZE);
508 s = strchr(b, '/');
509 if (s)
510 *s = '!';
511
512 if (de) {
513 remove_proc_entry("journal", de);
514 remove_proc_entry("oidmap", de);
515 remove_proc_entry("on-disk-super", de);
516 remove_proc_entry("bitmap", de);
517 remove_proc_entry("per-level", de);
518 remove_proc_entry("super", de);
519 remove_proc_entry("version", de);
520 }
521 spin_lock(&__PINFO(sb).lock);
522 __PINFO(sb).exiting = 1;
523 spin_unlock(&__PINFO(sb).lock);
524 if (proc_info_root) {
525 remove_proc_entry(b, proc_info_root);
526 REISERFS_SB(sb)->procdir = NULL;
527 }
528 return 0;
529 }
530
531 int reiserfs_proc_info_global_init(void)
532 {
533 if (proc_info_root == NULL) {
534 proc_info_root = proc_mkdir(proc_info_root_name, NULL);
535 if (!proc_info_root) {
536 reiserfs_warning(NULL, "cannot create /proc/%s",
537 proc_info_root_name);
538 return 1;
539 }
540 }
541 return 0;
542 }
543
544 int reiserfs_proc_info_global_done(void)
545 {
546 if (proc_info_root != NULL) {
547 proc_info_root = NULL;
548 remove_proc_entry(proc_info_root_name, NULL);
549 }
550 return 0;
551 }
552 /*
553 * Revision 1.1.8.2 2001/07/15 17:08:42 god
554 * . use get_super() in procfs.c
555 * . remove remove_save_link() from reiserfs_do_truncate()
556 *
557 * I accept terms and conditions stated in the Legal Agreement
558 * (available at http://www.namesys.com/legalese.html)
559 *
560 * Revision 1.1.8.1 2001/07/11 16:48:50 god
561 * proc info support
562 *
563 * I accept terms and conditions stated in the Legal Agreement
564 * (available at http://www.namesys.com/legalese.html)
565 *
566 */
567
568 /*
569 * Make Linus happy.
570 * Local variables:
571 * c-indentation-style: "K&R"
572 * mode-name: "LC"
573 * c-basic-offset: 8
574 * tab-width: 8
575 * End:
576 */