reiserfs: rework reiserfs_warning
[linux-2.6.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 #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 #ifdef CONFIG_REISERFS_PROC_INFO
21
22 /*
23  * LOCKING:
24  *
25  * We rely on new Alexander Viro's super-block locking.
26  *
27  */
28
29 static int show_version(struct seq_file *m, struct super_block *sb)
30 {
31         char *format;
32
33         if (REISERFS_SB(sb)->s_properties & (1 << REISERFS_3_6)) {
34                 format = "3.6";
35         } else if (REISERFS_SB(sb)->s_properties & (1 << REISERFS_3_5)) {
36                 format = "3.5";
37         } else {
38                 format = "unknown";
39         }
40
41         seq_printf(m, "%s format\twith checks %s\n", format,
42 #if defined( CONFIG_REISERFS_CHECK )
43                    "on"
44 #else
45                    "off"
46 #endif
47             );
48         return 0;
49 }
50
51 int reiserfs_global_version_in_proc(char *buffer, char **start, off_t offset,
52                                     int count, int *eof, void *data)
53 {
54         *start = buffer;
55         *eof = 1;
56         return 0;
57 }
58
59 #define SF( x ) ( r -> x )
60 #define SFP( x ) SF( s_proc_info_data.x )
61 #define SFPL( x ) SFP( x[ level ] )
62 #define SFPF( x ) SFP( scan_bitmap.x )
63 #define SFPJ( x ) SFP( journal.x )
64
65 #define D2C( x ) le16_to_cpu( x )
66 #define D4C( x ) le32_to_cpu( x )
67 #define DF( x ) D2C( rs -> s_v1.x )
68 #define DFL( x ) D4C( rs -> s_v1.x )
69
70 #define objectid_map( s, rs ) (old_format_only (s) ?                            \
71                          (__le32 *)((struct reiserfs_super_block_v1 *)rs + 1) : \
72                          (__le32 *)(rs + 1))
73 #define MAP( i ) D4C( objectid_map( sb, rs )[ i ] )
74
75 #define DJF( x ) le32_to_cpu( rs -> x )
76 #define DJV( x ) le32_to_cpu( s_v1 -> x )
77 #define DJP( x ) le32_to_cpu( jp -> x )
78 #define JF( x ) ( r -> s_journal -> x )
79
80 static int show_super(struct seq_file *m, struct super_block *sb)
81 {
82         struct reiserfs_sb_info *r = REISERFS_SB(sb);
83
84         seq_printf(m, "state: \t%s\n"
85                    "mount options: \t%s%s%s%s%s%s%s%s%s%s%s\n"
86                    "gen. counter: \t%i\n"
87                    "s_disk_reads: \t%i\n"
88                    "s_disk_writes: \t%i\n"
89                    "s_fix_nodes: \t%i\n"
90                    "s_do_balance: \t%i\n"
91                    "s_unneeded_left_neighbor: \t%i\n"
92                    "s_good_search_by_key_reada: \t%i\n"
93                    "s_bmaps: \t%i\n"
94                    "s_bmaps_without_search: \t%i\n"
95                    "s_direct2indirect: \t%i\n"
96                    "s_indirect2direct: \t%i\n"
97                    "\n"
98                    "max_hash_collisions: \t%i\n"
99                    "breads: \t%lu\n"
100                    "bread_misses: \t%lu\n"
101                    "search_by_key: \t%lu\n"
102                    "search_by_key_fs_changed: \t%lu\n"
103                    "search_by_key_restarted: \t%lu\n"
104                    "insert_item_restarted: \t%lu\n"
105                    "paste_into_item_restarted: \t%lu\n"
106                    "cut_from_item_restarted: \t%lu\n"
107                    "delete_solid_item_restarted: \t%lu\n"
108                    "delete_item_restarted: \t%lu\n"
109                    "leaked_oid: \t%lu\n"
110                    "leaves_removable: \t%lu\n",
111                    SF(s_mount_state) == REISERFS_VALID_FS ?
112                    "REISERFS_VALID_FS" : "REISERFS_ERROR_FS",
113                    reiserfs_r5_hash(sb) ? "FORCE_R5 " : "",
114                    reiserfs_rupasov_hash(sb) ? "FORCE_RUPASOV " : "",
115                    reiserfs_tea_hash(sb) ? "FORCE_TEA " : "",
116                    reiserfs_hash_detect(sb) ? "DETECT_HASH " : "",
117                    reiserfs_no_border(sb) ? "NO_BORDER " : "BORDER ",
118                    reiserfs_no_unhashed_relocation(sb) ?
119                    "NO_UNHASHED_RELOCATION " : "",
120                    reiserfs_hashed_relocation(sb) ? "UNHASHED_RELOCATION " : "",
121                    reiserfs_test4(sb) ? "TEST4 " : "",
122                    have_large_tails(sb) ? "TAILS " : have_small_tails(sb) ?
123                    "SMALL_TAILS " : "NO_TAILS ",
124                    replay_only(sb) ? "REPLAY_ONLY " : "",
125                    convert_reiserfs(sb) ? "CONV " : "",
126                    atomic_read(&r->s_generation_counter),
127                    SF(s_disk_reads), SF(s_disk_writes), SF(s_fix_nodes),
128                    SF(s_do_balance), SF(s_unneeded_left_neighbor),
129                    SF(s_good_search_by_key_reada), SF(s_bmaps),
130                    SF(s_bmaps_without_search), SF(s_direct2indirect),
131                    SF(s_indirect2direct), SFP(max_hash_collisions), SFP(breads),
132                    SFP(bread_miss), SFP(search_by_key),
133                    SFP(search_by_key_fs_changed), SFP(search_by_key_restarted),
134                    SFP(insert_item_restarted), SFP(paste_into_item_restarted),
135                    SFP(cut_from_item_restarted),
136                    SFP(delete_solid_item_restarted), SFP(delete_item_restarted),
137                    SFP(leaked_oid), SFP(leaves_removable));
138
139         return 0;
140 }
141
142 static int show_per_level(struct seq_file *m, struct super_block *sb)
143 {
144         struct reiserfs_sb_info *r = REISERFS_SB(sb);
145         int level;
146
147         seq_printf(m, "level\t"
148                    "     balances"
149                    " [sbk:  reads"
150                    "   fs_changed"
151                    "   restarted]"
152                    "   free space"
153                    "        items"
154                    "   can_remove"
155                    "         lnum"
156                    "         rnum"
157                    "       lbytes"
158                    "       rbytes"
159                    "     get_neig"
160                    " get_neig_res" "  need_l_neig" "  need_r_neig" "\n");
161
162         for (level = 0; level < MAX_HEIGHT; ++level) {
163                 seq_printf(m, "%i\t"
164                            " %12lu"
165                            " %12lu"
166                            " %12lu"
167                            " %12lu"
168                            " %12lu"
169                            " %12lu"
170                            " %12lu"
171                            " %12li"
172                            " %12li"
173                            " %12li"
174                            " %12li"
175                            " %12lu"
176                            " %12lu"
177                            " %12lu"
178                            " %12lu"
179                            "\n",
180                            level,
181                            SFPL(balance_at),
182                            SFPL(sbk_read_at),
183                            SFPL(sbk_fs_changed),
184                            SFPL(sbk_restarted),
185                            SFPL(free_at),
186                            SFPL(items_at),
187                            SFPL(can_node_be_removed),
188                            SFPL(lnum),
189                            SFPL(rnum),
190                            SFPL(lbytes),
191                            SFPL(rbytes),
192                            SFPL(get_neighbors),
193                            SFPL(get_neighbors_restart),
194                            SFPL(need_l_neighbor), SFPL(need_r_neighbor)
195                     );
196         }
197         return 0;
198 }
199
200 static int show_bitmap(struct seq_file *m, struct super_block *sb)
201 {
202         struct reiserfs_sb_info *r = REISERFS_SB(sb);
203
204         seq_printf(m, "free_block: %lu\n"
205                    "  scan_bitmap:"
206                    "          wait"
207                    "          bmap"
208                    "         retry"
209                    "        stolen"
210                    "  journal_hint"
211                    "journal_nohint"
212                    "\n"
213                    " %14lu"
214                    " %14lu"
215                    " %14lu"
216                    " %14lu"
217                    " %14lu"
218                    " %14lu"
219                    " %14lu"
220                    "\n",
221                    SFP(free_block),
222                    SFPF(call),
223                    SFPF(wait),
224                    SFPF(bmap),
225                    SFPF(retry),
226                    SFPF(stolen),
227                    SFPF(in_journal_hint), SFPF(in_journal_nohint));
228
229         return 0;
230 }
231
232 static int show_on_disk_super(struct seq_file *m, struct super_block *sb)
233 {
234         struct reiserfs_sb_info *sb_info = REISERFS_SB(sb);
235         struct reiserfs_super_block *rs = sb_info->s_rs;
236         int hash_code = DFL(s_hash_function_code);
237         __u32 flags = DJF(s_flags);
238
239         seq_printf(m, "block_count: \t%i\n"
240                    "free_blocks: \t%i\n"
241                    "root_block: \t%i\n"
242                    "blocksize: \t%i\n"
243                    "oid_maxsize: \t%i\n"
244                    "oid_cursize: \t%i\n"
245                    "umount_state: \t%i\n"
246                    "magic: \t%10.10s\n"
247                    "fs_state: \t%i\n"
248                    "hash: \t%s\n"
249                    "tree_height: \t%i\n"
250                    "bmap_nr: \t%i\n"
251                    "version: \t%i\n"
252                    "flags: \t%x[%s]\n"
253                    "reserved_for_journal: \t%i\n",
254                    DFL(s_block_count),
255                    DFL(s_free_blocks),
256                    DFL(s_root_block),
257                    DF(s_blocksize),
258                    DF(s_oid_maxsize),
259                    DF(s_oid_cursize),
260                    DF(s_umount_state),
261                    rs->s_v1.s_magic,
262                    DF(s_fs_state),
263                    hash_code == TEA_HASH ? "tea" :
264                    (hash_code == YURA_HASH) ? "rupasov" :
265                    (hash_code == R5_HASH) ? "r5" :
266                    (hash_code == UNSET_HASH) ? "unset" : "unknown",
267                    DF(s_tree_height),
268                    DF(s_bmap_nr),
269                    DF(s_version), flags, (flags & reiserfs_attrs_cleared)
270                    ? "attrs_cleared" : "", DF(s_reserved_for_journal));
271
272         return 0;
273 }
274
275 static int show_oidmap(struct seq_file *m, struct super_block *sb)
276 {
277         struct reiserfs_sb_info *sb_info = REISERFS_SB(sb);
278         struct reiserfs_super_block *rs = sb_info->s_rs;
279         unsigned int mapsize = le16_to_cpu(rs->s_v1.s_oid_cursize);
280         unsigned long total_used = 0;
281         int i;
282
283         for (i = 0; i < mapsize; ++i) {
284                 __u32 right;
285
286                 right = (i == mapsize - 1) ? MAX_KEY_OBJECTID : MAP(i + 1);
287                 seq_printf(m, "%s: [ %x .. %x )\n",
288                            (i & 1) ? "free" : "used", MAP(i), right);
289                 if (!(i & 1)) {
290                         total_used += right - MAP(i);
291                 }
292         }
293 #if defined( REISERFS_USE_OIDMAPF )
294         if (sb_info->oidmap.use_file && (sb_info->oidmap.mapf != NULL)) {
295                 loff_t size = sb_info->oidmap.mapf->f_path.dentry->d_inode->i_size;
296                 total_used += size / sizeof(reiserfs_oidinterval_d_t);
297         }
298 #endif
299         seq_printf(m, "total: \t%i [%i/%i] used: %lu [exact]\n",
300                    mapsize,
301                    mapsize, le16_to_cpu(rs->s_v1.s_oid_maxsize), total_used);
302         return 0;
303 }
304
305 static int show_journal(struct seq_file *m, struct super_block *sb)
306 {
307         struct reiserfs_sb_info *r = REISERFS_SB(sb);
308         struct reiserfs_super_block *rs = r->s_rs;
309         struct journal_params *jp = &rs->s_v1.s_journal;
310         char b[BDEVNAME_SIZE];
311
312         seq_printf(m,           /* on-disk fields */
313                    "jp_journal_1st_block: \t%i\n"
314                    "jp_journal_dev: \t%s[%x]\n"
315                    "jp_journal_size: \t%i\n"
316                    "jp_journal_trans_max: \t%i\n"
317                    "jp_journal_magic: \t%i\n"
318                    "jp_journal_max_batch: \t%i\n"
319                    "jp_journal_max_commit_age: \t%i\n"
320                    "jp_journal_max_trans_age: \t%i\n"
321                    /* incore fields */
322                    "j_1st_reserved_block: \t%i\n"
323                    "j_state: \t%li\n"
324                    "j_trans_id: \t%u\n"
325                    "j_mount_id: \t%lu\n"
326                    "j_start: \t%lu\n"
327                    "j_len: \t%lu\n"
328                    "j_len_alloc: \t%lu\n"
329                    "j_wcount: \t%i\n"
330                    "j_bcount: \t%lu\n"
331                    "j_first_unflushed_offset: \t%lu\n"
332                    "j_last_flush_trans_id: \t%u\n"
333                    "j_trans_start_time: \t%li\n"
334                    "j_list_bitmap_index: \t%i\n"
335                    "j_must_wait: \t%i\n"
336                    "j_next_full_flush: \t%i\n"
337                    "j_next_async_flush: \t%i\n"
338                    "j_cnode_used: \t%i\n" "j_cnode_free: \t%i\n" "\n"
339                    /* reiserfs_proc_info_data_t.journal fields */
340                    "in_journal: \t%12lu\n"
341                    "in_journal_bitmap: \t%12lu\n"
342                    "in_journal_reusable: \t%12lu\n"
343                    "lock_journal: \t%12lu\n"
344                    "lock_journal_wait: \t%12lu\n"
345                    "journal_begin: \t%12lu\n"
346                    "journal_relock_writers: \t%12lu\n"
347                    "journal_relock_wcount: \t%12lu\n"
348                    "mark_dirty: \t%12lu\n"
349                    "mark_dirty_already: \t%12lu\n"
350                    "mark_dirty_notjournal: \t%12lu\n"
351                    "restore_prepared: \t%12lu\n"
352                    "prepare: \t%12lu\n"
353                    "prepare_retry: \t%12lu\n",
354                    DJP(jp_journal_1st_block),
355                    bdevname(SB_JOURNAL(sb)->j_dev_bd, b),
356                    DJP(jp_journal_dev),
357                    DJP(jp_journal_size),
358                    DJP(jp_journal_trans_max),
359                    DJP(jp_journal_magic),
360                    DJP(jp_journal_max_batch),
361                    SB_JOURNAL(sb)->j_max_commit_age,
362                    DJP(jp_journal_max_trans_age),
363                    JF(j_1st_reserved_block),
364                    JF(j_state),
365                    JF(j_trans_id),
366                    JF(j_mount_id),
367                    JF(j_start),
368                    JF(j_len),
369                    JF(j_len_alloc),
370                    atomic_read(&r->s_journal->j_wcount),
371                    JF(j_bcount),
372                    JF(j_first_unflushed_offset),
373                    JF(j_last_flush_trans_id),
374                    JF(j_trans_start_time),
375                    JF(j_list_bitmap_index),
376                    JF(j_must_wait),
377                    JF(j_next_full_flush),
378                    JF(j_next_async_flush),
379                    JF(j_cnode_used),
380                    JF(j_cnode_free),
381                    SFPJ(in_journal),
382                    SFPJ(in_journal_bitmap),
383                    SFPJ(in_journal_reusable),
384                    SFPJ(lock_journal),
385                    SFPJ(lock_journal_wait),
386                    SFPJ(journal_being),
387                    SFPJ(journal_relock_writers),
388                    SFPJ(journal_relock_wcount),
389                    SFPJ(mark_dirty),
390                    SFPJ(mark_dirty_already),
391                    SFPJ(mark_dirty_notjournal),
392                    SFPJ(restore_prepared), SFPJ(prepare), SFPJ(prepare_retry)
393             );
394         return 0;
395 }
396
397 /* iterator */
398 static int test_sb(struct super_block *sb, void *data)
399 {
400         return data == sb;
401 }
402
403 static int set_sb(struct super_block *sb, void *data)
404 {
405         return -ENOENT;
406 }
407
408 static void *r_start(struct seq_file *m, loff_t * pos)
409 {
410         struct proc_dir_entry *de = m->private;
411         struct super_block *s = de->parent->data;
412         loff_t l = *pos;
413
414         if (l)
415                 return NULL;
416
417         if (IS_ERR(sget(&reiserfs_fs_type, test_sb, set_sb, s)))
418                 return NULL;
419
420         up_write(&s->s_umount);
421         return s;
422 }
423
424 static void *r_next(struct seq_file *m, void *v, loff_t * pos)
425 {
426         ++*pos;
427         if (v)
428                 deactivate_super(v);
429         return NULL;
430 }
431
432 static void r_stop(struct seq_file *m, void *v)
433 {
434         if (v)
435                 deactivate_super(v);
436 }
437
438 static int r_show(struct seq_file *m, void *v)
439 {
440         struct proc_dir_entry *de = m->private;
441         int (*show) (struct seq_file *, struct super_block *) = de->data;
442         return show(m, v);
443 }
444
445 static const struct seq_operations r_ops = {
446         .start = r_start,
447         .next = r_next,
448         .stop = r_stop,
449         .show = r_show,
450 };
451
452 static int r_open(struct inode *inode, struct file *file)
453 {
454         int ret = seq_open(file, &r_ops);
455
456         if (!ret) {
457                 struct seq_file *m = file->private_data;
458                 m->private = PDE(inode);
459         }
460         return ret;
461 }
462
463 static const struct file_operations r_file_operations = {
464         .open = r_open,
465         .read = seq_read,
466         .llseek = seq_lseek,
467         .release = seq_release,
468         .owner = THIS_MODULE,
469 };
470
471 static struct proc_dir_entry *proc_info_root = NULL;
472 static const char proc_info_root_name[] = "fs/reiserfs";
473
474 static void add_file(struct super_block *sb, char *name,
475                      int (*func) (struct seq_file *, struct super_block *))
476 {
477         proc_create_data(name, 0, REISERFS_SB(sb)->procdir,
478                          &r_file_operations, func);
479 }
480
481 int reiserfs_proc_info_init(struct super_block *sb)
482 {
483         char b[BDEVNAME_SIZE];
484         char *s;
485
486         /* Some block devices use /'s */
487         strlcpy(b, reiserfs_bdevname(sb), BDEVNAME_SIZE);
488         s = strchr(b, '/');
489         if (s)
490                 *s = '!';
491
492         spin_lock_init(&__PINFO(sb).lock);
493         REISERFS_SB(sb)->procdir = proc_mkdir(b, proc_info_root);
494         if (REISERFS_SB(sb)->procdir) {
495                 REISERFS_SB(sb)->procdir->owner = THIS_MODULE;
496                 REISERFS_SB(sb)->procdir->data = sb;
497                 add_file(sb, "version", show_version);
498                 add_file(sb, "super", show_super);
499                 add_file(sb, "per-level", show_per_level);
500                 add_file(sb, "bitmap", show_bitmap);
501                 add_file(sb, "on-disk-super", show_on_disk_super);
502                 add_file(sb, "oidmap", show_oidmap);
503                 add_file(sb, "journal", show_journal);
504                 return 0;
505         }
506         reiserfs_warning(sb, "cannot create /proc/%s/%s",
507                          proc_info_root_name, b);
508         return 1;
509 }
510
511 int reiserfs_proc_info_done(struct super_block *sb)
512 {
513         struct proc_dir_entry *de = REISERFS_SB(sb)->procdir;
514         char b[BDEVNAME_SIZE];
515         char *s;
516
517         /* Some block devices use /'s */
518         strlcpy(b, reiserfs_bdevname(sb), BDEVNAME_SIZE);
519         s = strchr(b, '/');
520         if (s)
521                 *s = '!';
522
523         if (de) {
524                 remove_proc_entry("journal", de);
525                 remove_proc_entry("oidmap", de);
526                 remove_proc_entry("on-disk-super", de);
527                 remove_proc_entry("bitmap", de);
528                 remove_proc_entry("per-level", de);
529                 remove_proc_entry("super", de);
530                 remove_proc_entry("version", de);
531         }
532         spin_lock(&__PINFO(sb).lock);
533         __PINFO(sb).exiting = 1;
534         spin_unlock(&__PINFO(sb).lock);
535         if (proc_info_root) {
536                 remove_proc_entry(b, proc_info_root);
537                 REISERFS_SB(sb)->procdir = NULL;
538         }
539         return 0;
540 }
541
542 struct proc_dir_entry *reiserfs_proc_register_global(char *name,
543                                                      read_proc_t * func)
544 {
545         return (proc_info_root) ? create_proc_read_entry(name, 0,
546                                                          proc_info_root,
547                                                          func, NULL) : NULL;
548 }
549
550 void reiserfs_proc_unregister_global(const char *name)
551 {
552         remove_proc_entry(name, proc_info_root);
553 }
554
555 int reiserfs_proc_info_global_init(void)
556 {
557         if (proc_info_root == NULL) {
558                 proc_info_root = proc_mkdir(proc_info_root_name, NULL);
559                 if (proc_info_root) {
560                         proc_info_root->owner = THIS_MODULE;
561                 } else {
562                         reiserfs_warning(NULL, "cannot create /proc/%s",
563                                          proc_info_root_name);
564                         return 1;
565                 }
566         }
567         return 0;
568 }
569
570 int reiserfs_proc_info_global_done(void)
571 {
572         if (proc_info_root != NULL) {
573                 proc_info_root = NULL;
574                 remove_proc_entry(proc_info_root_name, NULL);
575         }
576         return 0;
577 }
578
579 /* REISERFS_PROC_INFO */
580 #else
581
582 int reiserfs_proc_info_init(struct super_block *sb)
583 {
584         return 0;
585 }
586 int reiserfs_proc_info_done(struct super_block *sb)
587 {
588         return 0;
589 }
590
591 struct proc_dir_entry *reiserfs_proc_register_global(char *name,
592                                                      read_proc_t * func)
593 {
594         return NULL;
595 }
596
597 void reiserfs_proc_unregister_global(const char *name)
598 {;
599 }
600
601 int reiserfs_proc_info_global_init(void)
602 {
603         return 0;
604 }
605 int reiserfs_proc_info_global_done(void)
606 {
607         return 0;
608 }
609
610 int reiserfs_global_version_in_proc(char *buffer, char **start,
611                                     off_t offset,
612                                     int count, int *eof, void *data)
613 {
614         return 0;
615 }
616
617 /* REISERFS_PROC_INFO */
618 #endif
619
620 /*
621  * Revision 1.1.8.2  2001/07/15 17:08:42  god
622  *  . use get_super() in procfs.c
623  *  . remove remove_save_link() from reiserfs_do_truncate()
624  *
625  * I accept terms and conditions stated in the Legal Agreement
626  * (available at http://www.namesys.com/legalese.html)
627  *
628  * Revision 1.1.8.1  2001/07/11 16:48:50  god
629  * proc info support
630  *
631  * I accept terms and conditions stated in the Legal Agreement
632  * (available at http://www.namesys.com/legalese.html)
633  *
634  */
635
636 /* 
637  * Make Linus happy.
638  * Local variables:
639  * c-indentation-style: "K&R"
640  * mode-name: "LC"
641  * c-basic-offset: 8
642  * tab-width: 8
643  * End:
644  */