Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux...
[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 /*
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  */