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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 #include <linux/module.h>
12 #include <linux/time.h>
13 #include <linux/seq_file.h>
14 #include <linux/uaccess.h>
15 #include "reiserfs.h"
16 #include <linux/init.h>
17 #include <linux/proc_fs.h>
18
19 /*
20 * LOCKING:
21 *
22 * These guys are evicted from procfs as the very first step in ->kill_sb().
23 *
24 */
25
26 static int show_version(struct seq_file *m, void *unused)
27 {
28 struct super_block *sb = m->private;
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, void *unused)
71 {
72 struct super_block *sb = m->private;
73 struct reiserfs_sb_info *r = REISERFS_SB(sb);
74
75 seq_printf(m, "state: \t%s\n"
76 "mount options: \t%s%s%s%s%s%s%s%s%s%s%s\n"
77 "gen. counter: \t%i\n"
78 "s_disk_reads: \t%i\n"
79 "s_disk_writes: \t%i\n"
80 "s_fix_nodes: \t%i\n"
81 "s_do_balance: \t%i\n"
82 "s_unneeded_left_neighbor: \t%i\n"
83 "s_good_search_by_key_reada: \t%i\n"
84 "s_bmaps: \t%i\n"
85 "s_bmaps_without_search: \t%i\n"
86 "s_direct2indirect: \t%i\n"
87 "s_indirect2direct: \t%i\n"
88 "\n"
89 "max_hash_collisions: \t%i\n"
90 "breads: \t%lu\n"
91 "bread_misses: \t%lu\n"
92 "search_by_key: \t%lu\n"
93 "search_by_key_fs_changed: \t%lu\n"
94 "search_by_key_restarted: \t%lu\n"
95 "insert_item_restarted: \t%lu\n"
96 "paste_into_item_restarted: \t%lu\n"
97 "cut_from_item_restarted: \t%lu\n"
98 "delete_solid_item_restarted: \t%lu\n"
99 "delete_item_restarted: \t%lu\n"
100 "leaked_oid: \t%lu\n"
101 "leaves_removable: \t%lu\n",
102 SF(s_mount_state) == REISERFS_VALID_FS ?
103 "REISERFS_VALID_FS" : "REISERFS_ERROR_FS",
104 reiserfs_r5_hash(sb) ? "FORCE_R5 " : "",
105 reiserfs_rupasov_hash(sb) ? "FORCE_RUPASOV " : "",
106 reiserfs_tea_hash(sb) ? "FORCE_TEA " : "",
107 reiserfs_hash_detect(sb) ? "DETECT_HASH " : "",
108 reiserfs_no_border(sb) ? "NO_BORDER " : "BORDER ",
109 reiserfs_no_unhashed_relocation(sb) ?
110 "NO_UNHASHED_RELOCATION " : "",
111 reiserfs_hashed_relocation(sb) ? "UNHASHED_RELOCATION " : "",
112 reiserfs_test4(sb) ? "TEST4 " : "",
113 have_large_tails(sb) ? "TAILS " : have_small_tails(sb) ?
114 "SMALL_TAILS " : "NO_TAILS ",
115 replay_only(sb) ? "REPLAY_ONLY " : "",
116 convert_reiserfs(sb) ? "CONV " : "",
117 atomic_read(&r->s_generation_counter),
118 SF(s_disk_reads), SF(s_disk_writes), SF(s_fix_nodes),
119 SF(s_do_balance), SF(s_unneeded_left_neighbor),
120 SF(s_good_search_by_key_reada), SF(s_bmaps),
121 SF(s_bmaps_without_search), SF(s_direct2indirect),
122 SF(s_indirect2direct), SFP(max_hash_collisions), SFP(breads),
123 SFP(bread_miss), SFP(search_by_key),
124 SFP(search_by_key_fs_changed), SFP(search_by_key_restarted),
125 SFP(insert_item_restarted), SFP(paste_into_item_restarted),
126 SFP(cut_from_item_restarted),
127 SFP(delete_solid_item_restarted), SFP(delete_item_restarted),
128 SFP(leaked_oid), SFP(leaves_removable));
129
130 return 0;
131 }
132
133 static int show_per_level(struct seq_file *m, void *unused)
134 {
135 struct super_block *sb = m->private;
136 struct reiserfs_sb_info *r = REISERFS_SB(sb);
137 int level;
138
139 seq_printf(m, "level\t"
140 " balances"
141 " [sbk: reads"
142 " fs_changed"
143 " restarted]"
144 " free space"
145 " items"
146 " can_remove"
147 " lnum"
148 " rnum"
149 " lbytes"
150 " rbytes"
151 " get_neig"
152 " get_neig_res" " need_l_neig" " need_r_neig" "\n");
153
154 for (level = 0; level < MAX_HEIGHT; ++level) {
155 seq_printf(m, "%i\t"
156 " %12lu"
157 " %12lu"
158 " %12lu"
159 " %12lu"
160 " %12lu"
161 " %12lu"
162 " %12lu"
163 " %12li"
164 " %12li"
165 " %12li"
166 " %12li"
167 " %12lu"
168 " %12lu"
169 " %12lu"
170 " %12lu"
171 "\n",
172 level,
173 SFPL(balance_at),
174 SFPL(sbk_read_at),
175 SFPL(sbk_fs_changed),
176 SFPL(sbk_restarted),
177 SFPL(free_at),
178 SFPL(items_at),
179 SFPL(can_node_be_removed),
180 SFPL(lnum),
181 SFPL(rnum),
182 SFPL(lbytes),
183 SFPL(rbytes),
184 SFPL(get_neighbors),
185 SFPL(get_neighbors_restart),
186 SFPL(need_l_neighbor), SFPL(need_r_neighbor)
187 );
188 }
189 return 0;
190 }
191
192 static int show_bitmap(struct seq_file *m, void *unused)
193 {
194 struct super_block *sb = m->private;
195 struct reiserfs_sb_info *r = REISERFS_SB(sb);
196
197 seq_printf(m, "free_block: %lu\n"
198 " scan_bitmap:"
199 " wait"
200 " bmap"
201 " retry"
202 " stolen"
203 " journal_hint"
204 "journal_nohint"
205 "\n"
206 " %14lu"
207 " %14lu"
208 " %14lu"
209 " %14lu"
210 " %14lu"
211 " %14lu"
212 " %14lu"
213 "\n",
214 SFP(free_block),
215 SFPF(call),
216 SFPF(wait),
217 SFPF(bmap),
218 SFPF(retry),
219 SFPF(stolen),
220 SFPF(in_journal_hint), SFPF(in_journal_nohint));
221
222 return 0;
223 }
224
225 static int show_on_disk_super(struct seq_file *m, void *unused)
226 {
227 struct super_block *sb = m->private;
228 struct reiserfs_sb_info *sb_info = REISERFS_SB(sb);
229 struct reiserfs_super_block *rs = sb_info->s_rs;
230 int hash_code = DFL(s_hash_function_code);
231 __u32 flags = DJF(s_flags);
232
233 seq_printf(m, "block_count: \t%i\n"
234 "free_blocks: \t%i\n"
235 "root_block: \t%i\n"
236 "blocksize: \t%i\n"
237 "oid_maxsize: \t%i\n"
238 "oid_cursize: \t%i\n"
239 "umount_state: \t%i\n"
240 "magic: \t%10.10s\n"
241 "fs_state: \t%i\n"
242 "hash: \t%s\n"
243 "tree_height: \t%i\n"
244 "bmap_nr: \t%i\n"
245 "version: \t%i\n"
246 "flags: \t%x[%s]\n"
247 "reserved_for_journal: \t%i\n",
248 DFL(s_block_count),
249 DFL(s_free_blocks),
250 DFL(s_root_block),
251 DF(s_blocksize),
252 DF(s_oid_maxsize),
253 DF(s_oid_cursize),
254 DF(s_umount_state),
255 rs->s_v1.s_magic,
256 DF(s_fs_state),
257 hash_code == TEA_HASH ? "tea" :
258 (hash_code == YURA_HASH) ? "rupasov" :
259 (hash_code == R5_HASH) ? "r5" :
260 (hash_code == UNSET_HASH) ? "unset" : "unknown",
261 DF(s_tree_height),
262 DF(s_bmap_nr),
263 DF(s_version), flags, (flags & reiserfs_attrs_cleared)
264 ? "attrs_cleared" : "", DF(s_reserved_for_journal));
265
266 return 0;
267 }
268
269 static int show_oidmap(struct seq_file *m, void *unused)
270 {
271 struct super_block *sb = m->private;
272 struct reiserfs_sb_info *sb_info = REISERFS_SB(sb);
273 struct reiserfs_super_block *rs = sb_info->s_rs;
274 unsigned int mapsize = le16_to_cpu(rs->s_v1.s_oid_cursize);
275 unsigned long total_used = 0;
276 int i;
277
278 for (i = 0; i < mapsize; ++i) {
279 __u32 right;
280
281 right = (i == mapsize - 1) ? MAX_KEY_OBJECTID : MAP(i + 1);
282 seq_printf(m, "%s: [ %x .. %x )\n",
283 (i & 1) ? "free" : "used", MAP(i), right);
284 if (!(i & 1)) {
285 total_used += right - MAP(i);
286 }
287 }
288 #if defined( REISERFS_USE_OIDMAPF )
289 if (sb_info->oidmap.use_file && (sb_info->oidmap.mapf != NULL)) {
290 loff_t size = file_inode(sb_info->oidmap.mapf)->i_size;
291 total_used += size / sizeof(reiserfs_oidinterval_d_t);
292 }
293 #endif
294 seq_printf(m, "total: \t%i [%i/%i] used: %lu [exact]\n",
295 mapsize,
296 mapsize, le16_to_cpu(rs->s_v1.s_oid_maxsize), total_used);
297 return 0;
298 }
299
300 static int show_journal(struct seq_file *m, void *unused)
301 {
302 struct super_block *sb = m->private;
303 struct reiserfs_sb_info *r = REISERFS_SB(sb);
304 struct reiserfs_super_block *rs = r->s_rs;
305 struct journal_params *jp = &rs->s_v1.s_journal;
306
307 seq_printf(m, /* on-disk fields */
308 "jp_journal_1st_block: \t%i\n"
309 "jp_journal_dev: \t%pg[%x]\n"
310 "jp_journal_size: \t%i\n"
311 "jp_journal_trans_max: \t%i\n"
312 "jp_journal_magic: \t%i\n"
313 "jp_journal_max_batch: \t%i\n"
314 "jp_journal_max_commit_age: \t%i\n"
315 "jp_journal_max_trans_age: \t%i\n"
316 /* incore fields */
317 "j_1st_reserved_block: \t%i\n"
318 "j_state: \t%li\n"
319 "j_trans_id: \t%u\n"
320 "j_mount_id: \t%lu\n"
321 "j_start: \t%lu\n"
322 "j_len: \t%lu\n"
323 "j_len_alloc: \t%lu\n"
324 "j_wcount: \t%i\n"
325 "j_bcount: \t%lu\n"
326 "j_first_unflushed_offset: \t%lu\n"
327 "j_last_flush_trans_id: \t%u\n"
328 "j_trans_start_time: \t%li\n"
329 "j_list_bitmap_index: \t%i\n"
330 "j_must_wait: \t%i\n"
331 "j_next_full_flush: \t%i\n"
332 "j_next_async_flush: \t%i\n"
333 "j_cnode_used: \t%i\n" "j_cnode_free: \t%i\n" "\n"
334 /* reiserfs_proc_info_data_t.journal fields */
335 "in_journal: \t%12lu\n"
336 "in_journal_bitmap: \t%12lu\n"
337 "in_journal_reusable: \t%12lu\n"
338 "lock_journal: \t%12lu\n"
339 "lock_journal_wait: \t%12lu\n"
340 "journal_begin: \t%12lu\n"
341 "journal_relock_writers: \t%12lu\n"
342 "journal_relock_wcount: \t%12lu\n"
343 "mark_dirty: \t%12lu\n"
344 "mark_dirty_already: \t%12lu\n"
345 "mark_dirty_notjournal: \t%12lu\n"
346 "restore_prepared: \t%12lu\n"
347 "prepare: \t%12lu\n"
348 "prepare_retry: \t%12lu\n",
349 DJP(jp_journal_1st_block),
350 SB_JOURNAL(sb)->j_dev_bd,
351 DJP(jp_journal_dev),
352 DJP(jp_journal_size),
353 DJP(jp_journal_trans_max),
354 DJP(jp_journal_magic),
355 DJP(jp_journal_max_batch),
356 SB_JOURNAL(sb)->j_max_commit_age,
357 DJP(jp_journal_max_trans_age),
358 JF(j_1st_reserved_block),
359 JF(j_state),
360 JF(j_trans_id),
361 JF(j_mount_id),
362 JF(j_start),
363 JF(j_len),
364 JF(j_len_alloc),
365 atomic_read(&r->s_journal->j_wcount),
366 JF(j_bcount),
367 JF(j_first_unflushed_offset),
368 JF(j_last_flush_trans_id),
369 JF(j_trans_start_time),
370 JF(j_list_bitmap_index),
371 JF(j_must_wait),
372 JF(j_next_full_flush),
373 JF(j_next_async_flush),
374 JF(j_cnode_used),
375 JF(j_cnode_free),
376 SFPJ(in_journal),
377 SFPJ(in_journal_bitmap),
378 SFPJ(in_journal_reusable),
379 SFPJ(lock_journal),
380 SFPJ(lock_journal_wait),
381 SFPJ(journal_being),
382 SFPJ(journal_relock_writers),
383 SFPJ(journal_relock_wcount),
384 SFPJ(mark_dirty),
385 SFPJ(mark_dirty_already),
386 SFPJ(mark_dirty_notjournal),
387 SFPJ(restore_prepared), SFPJ(prepare), SFPJ(prepare_retry)
388 );
389 return 0;
390 }
391
392 static int r_open(struct inode *inode, struct file *file)
393 {
394 return single_open(file, PDE_DATA(inode),
395 proc_get_parent_data(inode));
396 }
397
398 static const struct file_operations r_file_operations = {
399 .open = r_open,
400 .read = seq_read,
401 .llseek = seq_lseek,
402 .release = single_release,
403 };
404
405 static struct proc_dir_entry *proc_info_root = NULL;
406 static const char proc_info_root_name[] = "fs/reiserfs";
407
408 static void add_file(struct super_block *sb, char *name,
409 int (*func) (struct seq_file *, void *))
410 {
411 proc_create_data(name, 0, REISERFS_SB(sb)->procdir,
412 &r_file_operations, func);
413 }
414
415 int reiserfs_proc_info_init(struct super_block *sb)
416 {
417 char b[BDEVNAME_SIZE];
418 char *s;
419
420 /* Some block devices use /'s */
421 strlcpy(b, sb->s_id, BDEVNAME_SIZE);
422 s = strchr(b, '/');
423 if (s)
424 *s = '!';
425
426 spin_lock_init(&__PINFO(sb).lock);
427 REISERFS_SB(sb)->procdir = proc_mkdir_data(b, 0, proc_info_root, sb);
428 if (REISERFS_SB(sb)->procdir) {
429 add_file(sb, "version", show_version);
430 add_file(sb, "super", show_super);
431 add_file(sb, "per-level", show_per_level);
432 add_file(sb, "bitmap", show_bitmap);
433 add_file(sb, "on-disk-super", show_on_disk_super);
434 add_file(sb, "oidmap", show_oidmap);
435 add_file(sb, "journal", show_journal);
436 return 0;
437 }
438 reiserfs_warning(sb, "cannot create /proc/%s/%s",
439 proc_info_root_name, b);
440 return 1;
441 }
442
443 int reiserfs_proc_info_done(struct super_block *sb)
444 {
445 struct proc_dir_entry *de = REISERFS_SB(sb)->procdir;
446 if (de) {
447 char b[BDEVNAME_SIZE];
448 char *s;
449
450 /* Some block devices use /'s */
451 strlcpy(b, sb->s_id, BDEVNAME_SIZE);
452 s = strchr(b, '/');
453 if (s)
454 *s = '!';
455
456 remove_proc_subtree(b, proc_info_root);
457 REISERFS_SB(sb)->procdir = NULL;
458 }
459 return 0;
460 }
461
462 int reiserfs_proc_info_global_init(void)
463 {
464 if (proc_info_root == NULL) {
465 proc_info_root = proc_mkdir(proc_info_root_name, NULL);
466 if (!proc_info_root) {
467 reiserfs_warning(NULL, "cannot create /proc/%s",
468 proc_info_root_name);
469 return 1;
470 }
471 }
472 return 0;
473 }
474
475 int reiserfs_proc_info_global_done(void)
476 {
477 if (proc_info_root != NULL) {
478 proc_info_root = NULL;
479 remove_proc_entry(proc_info_root_name, NULL);
480 }
481 return 0;
482 }
483 /*
484 * Revision 1.1.8.2 2001/07/15 17:08:42 god
485 * . use get_super() in procfs.c
486 * . remove remove_save_link() from reiserfs_do_truncate()
487 *
488 * I accept terms and conditions stated in the Legal Agreement
489 * (available at http://www.namesys.com/legalese.html)
490 *
491 * Revision 1.1.8.1 2001/07/11 16:48:50 god
492 * proc info support
493 *
494 * I accept terms and conditions stated in the Legal Agreement
495 * (available at http://www.namesys.com/legalese.html)
496 *
497 */
498
499 /*
500 * Make Linus happy.
501 * Local variables:
502 * c-indentation-style: "K&R"
503 * mode-name: "LC"
504 * c-basic-offset: 8
505 * tab-width: 8
506 * End:
507 */
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