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[mirror_ubuntu-artful-kernel.git] / fs / reiserfs / procfs.c
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 /* $Id: procfs.c,v 1.1.8.2 2001/07/15 17:08:42 god Exp $ */
12
13 #include <linux/config.h>
14 #include <linux/module.h>
15 #include <linux/time.h>
16 #include <linux/seq_file.h>
17 #include <asm/uaccess.h>
18 #include <linux/reiserfs_fs.h>
19 #include <linux/reiserfs_fs_sb.h>
20 #include <linux/smp_lock.h>
21 #include <linux/init.h>
22 #include <linux/proc_fs.h>
23
24 #if defined( REISERFS_PROC_INFO )
25
26 /*
27 * LOCKING:
28 *
29 * We rely on new Alexander Viro's super-block locking.
30 *
31 */
32
33 static int show_version(struct seq_file *m, struct super_block *sb)
34 {
35 char *format;
36
37 if ( REISERFS_SB(sb)->s_properties & (1 << REISERFS_3_6) ) {
38 format = "3.6";
39 } else if ( REISERFS_SB(sb)->s_properties & (1 << REISERFS_3_5) ) {
40 format = "3.5";
41 } else {
42 format = "unknown";
43 }
44
45 seq_printf(m, "%s format\twith checks %s\n",
46 format,
47 #if defined( CONFIG_REISERFS_CHECK )
48 "on"
49 #else
50 "off"
51 #endif
52 );
53 return 0;
54 }
55
56 int reiserfs_global_version_in_proc( char *buffer, char **start, off_t offset,
57 int count, int *eof, void *data )
58 {
59 *start = buffer;
60 *eof = 1;
61 return 0;
62 }
63
64 #define SF( x ) ( r -> x )
65 #define SFP( x ) SF( s_proc_info_data.x )
66 #define SFPL( x ) SFP( x[ level ] )
67 #define SFPF( x ) SFP( scan_bitmap.x )
68 #define SFPJ( x ) SFP( journal.x )
69
70 #define D2C( x ) le16_to_cpu( x )
71 #define D4C( x ) le32_to_cpu( x )
72 #define DF( x ) D2C( rs -> s_v1.x )
73 #define DFL( x ) D4C( rs -> s_v1.x )
74
75 #define objectid_map( s, rs ) (old_format_only (s) ? \
76 (__u32 *)((struct reiserfs_super_block_v1 *)rs + 1) : \
77 (__u32 *)(rs + 1))
78 #define MAP( i ) D4C( objectid_map( sb, rs )[ i ] )
79
80 #define DJF( x ) le32_to_cpu( rs -> x )
81 #define DJV( x ) le32_to_cpu( s_v1 -> x )
82 #define DJP( x ) le32_to_cpu( jp -> x )
83 #define JF( x ) ( r -> s_journal -> x )
84
85 static int show_super(struct seq_file *m, struct super_block *sb)
86 {
87 struct reiserfs_sb_info *r = REISERFS_SB(sb);
88
89 seq_printf(m, "state: \t%s\n"
90 "mount options: \t%s%s%s%s%s%s%s%s%s%s%s\n"
91 "gen. counter: \t%i\n"
92 "s_kmallocs: \t%i\n"
93 "s_disk_reads: \t%i\n"
94 "s_disk_writes: \t%i\n"
95 "s_fix_nodes: \t%i\n"
96 "s_do_balance: \t%i\n"
97 "s_unneeded_left_neighbor: \t%i\n"
98 "s_good_search_by_key_reada: \t%i\n"
99 "s_bmaps: \t%i\n"
100 "s_bmaps_without_search: \t%i\n"
101 "s_direct2indirect: \t%i\n"
102 "s_indirect2direct: \t%i\n"
103 "\n"
104 "max_hash_collisions: \t%i\n"
105
106 "breads: \t%lu\n"
107 "bread_misses: \t%lu\n"
108
109 "search_by_key: \t%lu\n"
110 "search_by_key_fs_changed: \t%lu\n"
111 "search_by_key_restarted: \t%lu\n"
112
113 "insert_item_restarted: \t%lu\n"
114 "paste_into_item_restarted: \t%lu\n"
115 "cut_from_item_restarted: \t%lu\n"
116 "delete_solid_item_restarted: \t%lu\n"
117 "delete_item_restarted: \t%lu\n"
118
119 "leaked_oid: \t%lu\n"
120 "leaves_removable: \t%lu\n",
121
122 SF( s_mount_state ) == REISERFS_VALID_FS ?
123 "REISERFS_VALID_FS" : "REISERFS_ERROR_FS",
124 reiserfs_r5_hash( sb ) ? "FORCE_R5 " : "",
125 reiserfs_rupasov_hash( sb ) ? "FORCE_RUPASOV " : "",
126 reiserfs_tea_hash( sb ) ? "FORCE_TEA " : "",
127 reiserfs_hash_detect( sb ) ? "DETECT_HASH " : "",
128 reiserfs_no_border( sb ) ? "NO_BORDER " : "BORDER ",
129 reiserfs_no_unhashed_relocation( sb ) ? "NO_UNHASHED_RELOCATION " : "",
130 reiserfs_hashed_relocation( sb ) ? "UNHASHED_RELOCATION " : "",
131 reiserfs_test4( sb ) ? "TEST4 " : "",
132 have_large_tails( sb ) ? "TAILS " : have_small_tails(sb)?"SMALL_TAILS ":"NO_TAILS ",
133 replay_only( sb ) ? "REPLAY_ONLY " : "",
134 convert_reiserfs( sb ) ? "CONV " : "",
135
136 atomic_read( &r -> s_generation_counter ),
137 SF( s_kmallocs ),
138 SF( s_disk_reads ),
139 SF( s_disk_writes ),
140 SF( s_fix_nodes ),
141 SF( s_do_balance ),
142 SF( s_unneeded_left_neighbor ),
143 SF( s_good_search_by_key_reada ),
144 SF( s_bmaps ),
145 SF( s_bmaps_without_search ),
146 SF( s_direct2indirect ),
147 SF( s_indirect2direct ),
148 SFP( max_hash_collisions ),
149 SFP( breads ),
150 SFP( bread_miss ),
151 SFP( search_by_key ),
152 SFP( search_by_key_fs_changed ),
153 SFP( search_by_key_restarted ),
154
155 SFP( insert_item_restarted ),
156 SFP( paste_into_item_restarted ),
157 SFP( cut_from_item_restarted ),
158 SFP( delete_solid_item_restarted ),
159 SFP( delete_item_restarted ),
160
161 SFP( leaked_oid ),
162 SFP( leaves_removable ) );
163
164 return 0;
165 }
166
167 static int show_per_level(struct seq_file *m, struct super_block *sb)
168 {
169 struct reiserfs_sb_info *r = REISERFS_SB(sb);
170 int level;
171
172 seq_printf(m, "level\t"
173 " balances"
174 " [sbk: reads"
175 " fs_changed"
176 " restarted]"
177 " free space"
178 " items"
179 " can_remove"
180 " lnum"
181 " rnum"
182 " lbytes"
183 " rbytes"
184 " get_neig"
185 " get_neig_res"
186 " need_l_neig"
187 " need_r_neig"
188 "\n"
189
190 );
191
192 for( level = 0 ; level < MAX_HEIGHT ; ++ level ) {
193 seq_printf(m, "%i\t"
194 " %12lu"
195 " %12lu"
196 " %12lu"
197 " %12lu"
198 " %12lu"
199 " %12lu"
200 " %12lu"
201 " %12li"
202 " %12li"
203 " %12li"
204 " %12li"
205 " %12lu"
206 " %12lu"
207 " %12lu"
208 " %12lu"
209 "\n",
210 level,
211 SFPL( balance_at ),
212 SFPL( sbk_read_at ),
213 SFPL( sbk_fs_changed ),
214 SFPL( sbk_restarted ),
215 SFPL( free_at ),
216 SFPL( items_at ),
217 SFPL( can_node_be_removed ),
218 SFPL( lnum ),
219 SFPL( rnum ),
220 SFPL( lbytes ),
221 SFPL( rbytes ),
222 SFPL( get_neighbors ),
223 SFPL( get_neighbors_restart ),
224 SFPL( need_l_neighbor ),
225 SFPL( need_r_neighbor )
226 );
227 }
228 return 0;
229 }
230
231 static int show_bitmap(struct seq_file *m, struct super_block *sb)
232 {
233 struct reiserfs_sb_info *r = REISERFS_SB(sb);
234
235 seq_printf(m, "free_block: %lu\n"
236 " scan_bitmap:"
237 " wait"
238 " bmap"
239 " retry"
240 " stolen"
241 " journal_hint"
242 "journal_nohint"
243 "\n"
244 " %14lu"
245 " %14lu"
246 " %14lu"
247 " %14lu"
248 " %14lu"
249 " %14lu"
250 " %14lu"
251 "\n",
252 SFP( free_block ),
253 SFPF( call ),
254 SFPF( wait ),
255 SFPF( bmap ),
256 SFPF( retry ),
257 SFPF( stolen ),
258 SFPF( in_journal_hint ),
259 SFPF( in_journal_nohint ) );
260
261 return 0;
262 }
263
264 static int show_on_disk_super(struct seq_file *m, struct super_block *sb)
265 {
266 struct reiserfs_sb_info *sb_info = REISERFS_SB(sb);
267 struct reiserfs_super_block *rs = sb_info -> s_rs;
268 int hash_code = DFL( s_hash_function_code );
269 __u32 flags = DJF( s_flags );
270
271 seq_printf(m, "block_count: \t%i\n"
272 "free_blocks: \t%i\n"
273 "root_block: \t%i\n"
274 "blocksize: \t%i\n"
275 "oid_maxsize: \t%i\n"
276 "oid_cursize: \t%i\n"
277 "umount_state: \t%i\n"
278 "magic: \t%10.10s\n"
279 "fs_state: \t%i\n"
280 "hash: \t%s\n"
281 "tree_height: \t%i\n"
282 "bmap_nr: \t%i\n"
283 "version: \t%i\n"
284 "flags: \t%x[%s]\n"
285 "reserved_for_journal: \t%i\n",
286
287 DFL( s_block_count ),
288 DFL( s_free_blocks ),
289 DFL( s_root_block ),
290 DF( s_blocksize ),
291 DF( s_oid_maxsize ),
292 DF( s_oid_cursize ),
293 DF( s_umount_state ),
294 rs -> s_v1.s_magic,
295 DF( s_fs_state ),
296 hash_code == TEA_HASH ? "tea" :
297 ( hash_code == YURA_HASH ) ? "rupasov" :
298 ( hash_code == R5_HASH ) ? "r5" :
299 ( hash_code == UNSET_HASH ) ? "unset" : "unknown",
300 DF( s_tree_height ),
301 DF( s_bmap_nr ),
302 DF( s_version ),
303 flags,
304 ( flags & reiserfs_attrs_cleared )
305 ? "attrs_cleared" : "",
306 DF (s_reserved_for_journal));
307
308 return 0;
309 }
310
311 static int show_oidmap(struct seq_file *m, struct super_block *sb)
312 {
313 struct reiserfs_sb_info *sb_info = REISERFS_SB(sb);
314 struct reiserfs_super_block *rs = sb_info -> s_rs;
315 unsigned int mapsize = le16_to_cpu( rs -> s_v1.s_oid_cursize );
316 unsigned long total_used = 0;
317 int i;
318
319 for( i = 0 ; i < mapsize ; ++i ) {
320 __u32 right;
321
322 right = ( i == mapsize - 1 ) ? MAX_KEY_OBJECTID : MAP( i + 1 );
323 seq_printf(m, "%s: [ %x .. %x )\n",
324 ( i & 1 ) ? "free" : "used", MAP( i ), right );
325 if( ! ( i & 1 ) ) {
326 total_used += right - MAP( i );
327 }
328 }
329 #if defined( REISERFS_USE_OIDMAPF )
330 if( sb_info -> oidmap.use_file && ( sb_info -> oidmap.mapf != NULL ) ) {
331 loff_t size = sb_info->oidmap.mapf->f_dentry->d_inode->i_size;
332 total_used += size / sizeof( reiserfs_oidinterval_d_t );
333 }
334 #endif
335 seq_printf(m, "total: \t%i [%i/%i] used: %lu [exact]\n",
336 mapsize,
337 mapsize, le16_to_cpu( rs -> s_v1.s_oid_maxsize ),
338 total_used);
339 return 0;
340 }
341
342 static int show_journal(struct seq_file *m, struct super_block *sb)
343 {
344 struct reiserfs_sb_info *r = REISERFS_SB(sb);
345 struct reiserfs_super_block *rs = r -> s_rs;
346 struct journal_params *jp = &rs->s_v1.s_journal;
347 char b[BDEVNAME_SIZE];
348
349
350 seq_printf(m, /* on-disk fields */
351 "jp_journal_1st_block: \t%i\n"
352 "jp_journal_dev: \t%s[%x]\n"
353 "jp_journal_size: \t%i\n"
354 "jp_journal_trans_max: \t%i\n"
355 "jp_journal_magic: \t%i\n"
356 "jp_journal_max_batch: \t%i\n"
357 "jp_journal_max_commit_age: \t%i\n"
358 "jp_journal_max_trans_age: \t%i\n"
359 /* incore fields */
360 "j_1st_reserved_block: \t%i\n"
361 "j_state: \t%li\n"
362 "j_trans_id: \t%lu\n"
363 "j_mount_id: \t%lu\n"
364 "j_start: \t%lu\n"
365 "j_len: \t%lu\n"
366 "j_len_alloc: \t%lu\n"
367 "j_wcount: \t%i\n"
368 "j_bcount: \t%lu\n"
369 "j_first_unflushed_offset: \t%lu\n"
370 "j_last_flush_trans_id: \t%lu\n"
371 "j_trans_start_time: \t%li\n"
372 "j_list_bitmap_index: \t%i\n"
373 "j_must_wait: \t%i\n"
374 "j_next_full_flush: \t%i\n"
375 "j_next_async_flush: \t%i\n"
376 "j_cnode_used: \t%i\n"
377 "j_cnode_free: \t%i\n"
378 "\n"
379 /* reiserfs_proc_info_data_t.journal fields */
380 "in_journal: \t%12lu\n"
381 "in_journal_bitmap: \t%12lu\n"
382 "in_journal_reusable: \t%12lu\n"
383 "lock_journal: \t%12lu\n"
384 "lock_journal_wait: \t%12lu\n"
385 "journal_begin: \t%12lu\n"
386 "journal_relock_writers: \t%12lu\n"
387 "journal_relock_wcount: \t%12lu\n"
388 "mark_dirty: \t%12lu\n"
389 "mark_dirty_already: \t%12lu\n"
390 "mark_dirty_notjournal: \t%12lu\n"
391 "restore_prepared: \t%12lu\n"
392 "prepare: \t%12lu\n"
393 "prepare_retry: \t%12lu\n",
394
395 DJP( jp_journal_1st_block ),
396 bdevname(SB_JOURNAL(sb)->j_dev_bd, b),
397 DJP( jp_journal_dev ),
398 DJP( jp_journal_size ),
399 DJP( jp_journal_trans_max ),
400 DJP( jp_journal_magic ),
401 DJP( jp_journal_max_batch ),
402 SB_JOURNAL(sb)->j_max_commit_age,
403 DJP( jp_journal_max_trans_age ),
404
405 JF( j_1st_reserved_block ),
406 JF( j_state ),
407 JF( j_trans_id ),
408 JF( j_mount_id ),
409 JF( j_start ),
410 JF( j_len ),
411 JF( j_len_alloc ),
412 atomic_read( & r -> s_journal -> j_wcount ),
413 JF( j_bcount ),
414 JF( j_first_unflushed_offset ),
415 JF( j_last_flush_trans_id ),
416 JF( j_trans_start_time ),
417 JF( j_list_bitmap_index ),
418 JF( j_must_wait ),
419 JF( j_next_full_flush ),
420 JF( j_next_async_flush ),
421 JF( j_cnode_used ),
422 JF( j_cnode_free ),
423
424 SFPJ( in_journal ),
425 SFPJ( in_journal_bitmap ),
426 SFPJ( in_journal_reusable ),
427 SFPJ( lock_journal ),
428 SFPJ( lock_journal_wait ),
429 SFPJ( journal_being ),
430 SFPJ( journal_relock_writers ),
431 SFPJ( journal_relock_wcount ),
432 SFPJ( mark_dirty ),
433 SFPJ( mark_dirty_already ),
434 SFPJ( mark_dirty_notjournal ),
435 SFPJ( restore_prepared ),
436 SFPJ( prepare ),
437 SFPJ( prepare_retry )
438 );
439 return 0;
440 }
441
442 /* iterator */
443 static int test_sb(struct super_block *sb, void *data)
444 {
445 return data == sb;
446 }
447
448 static int set_sb(struct super_block *sb, void *data)
449 {
450 return -ENOENT;
451 }
452
453 static void *r_start(struct seq_file *m, loff_t *pos)
454 {
455 struct proc_dir_entry *de = m->private;
456 struct super_block *s = de->parent->data;
457 loff_t l = *pos;
458
459 if (l)
460 return NULL;
461
462 if (IS_ERR(sget(&reiserfs_fs_type, test_sb, set_sb, s)))
463 return NULL;
464
465 up_write(&s->s_umount);
466
467 if (de->deleted) {
468 deactivate_super(s);
469 return NULL;
470 }
471
472 return s;
473 }
474
475 static void *r_next(struct seq_file *m, void *v, loff_t *pos)
476 {
477 ++*pos;
478 if (v)
479 deactivate_super(v);
480 return NULL;
481 }
482
483 static void r_stop(struct seq_file *m, void *v)
484 {
485 if (v)
486 deactivate_super(v);
487 }
488
489 static int r_show(struct seq_file *m, void *v)
490 {
491 struct proc_dir_entry *de = m->private;
492 int (*show)(struct seq_file *, struct super_block *) = de->data;
493 return show(m, v);
494 }
495
496 static struct seq_operations r_ops = {
497 .start = r_start,
498 .next = r_next,
499 .stop = r_stop,
500 .show = r_show,
501 };
502
503 static int r_open(struct inode *inode, struct file *file)
504 {
505 int ret = seq_open(file, &r_ops);
506
507 if (!ret) {
508 struct seq_file *m = file->private_data;
509 m->private = PDE(inode);
510 }
511 return ret;
512 }
513
514 static struct file_operations r_file_operations = {
515 .open = r_open,
516 .read = seq_read,
517 .llseek = seq_lseek,
518 .release = seq_release,
519 };
520
521 static struct proc_dir_entry *proc_info_root = NULL;
522 static const char proc_info_root_name[] = "fs/reiserfs";
523
524 static void add_file(struct super_block *sb, char *name,
525 int (*func)(struct seq_file *, struct super_block *))
526 {
527 struct proc_dir_entry *de;
528 de = create_proc_entry(name, 0, REISERFS_SB(sb)->procdir);
529 if (de) {
530 de->data = func;
531 de->proc_fops = &r_file_operations;
532 }
533 }
534
535 int reiserfs_proc_info_init( struct super_block *sb )
536 {
537 spin_lock_init( & __PINFO( sb ).lock );
538 REISERFS_SB(sb)->procdir = proc_mkdir(reiserfs_bdevname (sb), proc_info_root);
539 if( REISERFS_SB(sb)->procdir ) {
540 REISERFS_SB(sb)->procdir->owner = THIS_MODULE;
541 REISERFS_SB(sb)->procdir->data = sb;
542 add_file(sb, "version", show_version);
543 add_file(sb, "super", show_super);
544 add_file(sb, "per-level", show_per_level);
545 add_file(sb, "bitmap", show_bitmap);
546 add_file(sb, "on-disk-super", show_on_disk_super);
547 add_file(sb, "oidmap", show_oidmap);
548 add_file(sb, "journal", show_journal);
549 return 0;
550 }
551 reiserfs_warning(sb, "reiserfs: cannot create /proc/%s/%s",
552 proc_info_root_name, reiserfs_bdevname (sb) );
553 return 1;
554 }
555
556 int reiserfs_proc_info_done( struct super_block *sb )
557 {
558 struct proc_dir_entry *de = REISERFS_SB(sb)->procdir;
559 if (de) {
560 remove_proc_entry("journal", de);
561 remove_proc_entry("oidmap", de);
562 remove_proc_entry("on-disk-super", de);
563 remove_proc_entry("bitmap", de);
564 remove_proc_entry("per-level", de);
565 remove_proc_entry("super", de);
566 remove_proc_entry("version", de);
567 }
568 spin_lock( & __PINFO( sb ).lock );
569 __PINFO( sb ).exiting = 1;
570 spin_unlock( & __PINFO( sb ).lock );
571 if ( proc_info_root ) {
572 remove_proc_entry( reiserfs_bdevname (sb), proc_info_root );
573 REISERFS_SB(sb)->procdir = NULL;
574 }
575 return 0;
576 }
577
578 struct proc_dir_entry *reiserfs_proc_register_global( char *name,
579 read_proc_t *func )
580 {
581 return ( proc_info_root ) ? create_proc_read_entry( name, 0,
582 proc_info_root,
583 func, NULL ) : NULL;
584 }
585
586 void reiserfs_proc_unregister_global( const char *name )
587 {
588 remove_proc_entry( name, proc_info_root );
589 }
590
591 int reiserfs_proc_info_global_init( void )
592 {
593 if( proc_info_root == NULL ) {
594 proc_info_root = proc_mkdir(proc_info_root_name, NULL);
595 if( proc_info_root ) {
596 proc_info_root -> owner = THIS_MODULE;
597 } else {
598 reiserfs_warning (NULL,
599 "reiserfs: cannot create /proc/%s",
600 proc_info_root_name );
601 return 1;
602 }
603 }
604 return 0;
605 }
606
607 int reiserfs_proc_info_global_done( void )
608 {
609 if ( proc_info_root != NULL ) {
610 proc_info_root = NULL;
611 remove_proc_entry(proc_info_root_name, NULL);
612 }
613 return 0;
614 }
615
616 /* REISERFS_PROC_INFO */
617 #else
618
619 int reiserfs_proc_info_init( struct super_block *sb ) { return 0; }
620 int reiserfs_proc_info_done( struct super_block *sb ) { return 0; }
621
622 struct proc_dir_entry *reiserfs_proc_register_global( char *name,
623 read_proc_t *func )
624 { return NULL; }
625
626 void reiserfs_proc_unregister_global( const char *name ) {;}
627
628 int reiserfs_proc_info_global_init( void ) { return 0; }
629 int reiserfs_proc_info_global_done( void ) { return 0; }
630
631 int reiserfs_global_version_in_proc( char *buffer, char **start,
632 off_t offset,
633 int count, int *eof, void *data )
634 { return 0; }
635
636 /* REISERFS_PROC_INFO */
637 #endif
638
639 /*
640 * $Log: procfs.c,v $
641 * Revision 1.1.8.2 2001/07/15 17:08:42 god
642 * . use get_super() in procfs.c
643 * . remove remove_save_link() from reiserfs_do_truncate()
644 *
645 * I accept terms and conditions stated in the Legal Agreement
646 * (available at http://www.namesys.com/legalese.html)
647 *
648 * Revision 1.1.8.1 2001/07/11 16:48:50 god
649 * proc info support
650 *
651 * I accept terms and conditions stated in the Legal Agreement
652 * (available at http://www.namesys.com/legalese.html)
653 *
654 */
655
656 /*
657 * Make Linus happy.
658 * Local variables:
659 * c-indentation-style: "K&R"
660 * mode-name: "LC"
661 * c-basic-offset: 8
662 * tab-width: 8
663 * End:
664 */
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