xref: /openbmc/linux/fs/reiserfs/procfs.c (revision 512cb7e4)
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 #include <linux/blkdev.h>
19 
20 /*
21  * LOCKING:
22  *
23  * These guys are evicted from procfs as the very first step in ->kill_sb().
24  *
25  */
26 
show_version(struct seq_file * m,void * unused)27 static int show_version(struct seq_file *m, void *unused)
28 {
29 	struct super_block *sb = m->private;
30 	char *format;
31 
32 	if (REISERFS_SB(sb)->s_properties & (1 << REISERFS_3_6)) {
33 		format = "3.6";
34 	} else if (REISERFS_SB(sb)->s_properties & (1 << REISERFS_3_5)) {
35 		format = "3.5";
36 	} else {
37 		format = "unknown";
38 	}
39 
40 	seq_printf(m, "%s format\twith checks %s\n", format,
41 #if defined( CONFIG_REISERFS_CHECK )
42 		   "on"
43 #else
44 		   "off"
45 #endif
46 	    );
47 	return 0;
48 }
49 
50 #define SF( x ) ( r -> x )
51 #define SFP( x ) SF( s_proc_info_data.x )
52 #define SFPL( x ) SFP( x[ level ] )
53 #define SFPF( x ) SFP( scan_bitmap.x )
54 #define SFPJ( x ) SFP( journal.x )
55 
56 #define D2C( x ) le16_to_cpu( x )
57 #define D4C( x ) le32_to_cpu( x )
58 #define DF( x ) D2C( rs -> s_v1.x )
59 #define DFL( x ) D4C( rs -> s_v1.x )
60 
61 #define objectid_map( s, rs ) (old_format_only (s) ?				\
62                          (__le32 *)((struct reiserfs_super_block_v1 *)rs + 1) :	\
63 			 (__le32 *)(rs + 1))
64 #define MAP( i ) D4C( objectid_map( sb, rs )[ i ] )
65 
66 #define DJF( x ) le32_to_cpu( rs -> x )
67 #define DJP( x ) le32_to_cpu( jp -> x )
68 #define JF( x ) ( r -> s_journal -> x )
69 
show_super(struct seq_file * m,void * unused)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 
show_per_level(struct seq_file * m,void * unused)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 
show_bitmap(struct seq_file * m,void * unused)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 
show_on_disk_super(struct seq_file * m,void * unused)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 
show_oidmap(struct seq_file * m,void * unused)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 
ktime_mono_to_real_seconds(time64_t mono)300 static time64_t ktime_mono_to_real_seconds(time64_t mono)
301 {
302 	ktime_t kt = ktime_set(mono, NSEC_PER_SEC/2);
303 
304 	return ktime_divns(ktime_mono_to_real(kt), NSEC_PER_SEC);
305 }
306 
show_journal(struct seq_file * m,void * unused)307 static int show_journal(struct seq_file *m, void *unused)
308 {
309 	struct super_block *sb = m->private;
310 	struct reiserfs_sb_info *r = REISERFS_SB(sb);
311 	struct reiserfs_super_block *rs = r->s_rs;
312 	struct journal_params *jp = &rs->s_v1.s_journal;
313 
314 	seq_printf(m,		/* on-disk fields */
315 		   "jp_journal_1st_block: \t%i\n"
316 		   "jp_journal_dev: \t%pg[%x]\n"
317 		   "jp_journal_size: \t%i\n"
318 		   "jp_journal_trans_max: \t%i\n"
319 		   "jp_journal_magic: \t%i\n"
320 		   "jp_journal_max_batch: \t%i\n"
321 		   "jp_journal_max_commit_age: \t%i\n"
322 		   "jp_journal_max_trans_age: \t%i\n"
323 		   /* incore fields */
324 		   "j_1st_reserved_block: \t%i\n"
325 		   "j_state: \t%li\n"
326 		   "j_trans_id: \t%u\n"
327 		   "j_mount_id: \t%lu\n"
328 		   "j_start: \t%lu\n"
329 		   "j_len: \t%lu\n"
330 		   "j_len_alloc: \t%lu\n"
331 		   "j_wcount: \t%i\n"
332 		   "j_bcount: \t%lu\n"
333 		   "j_first_unflushed_offset: \t%lu\n"
334 		   "j_last_flush_trans_id: \t%u\n"
335 		   "j_trans_start_time: \t%lli\n"
336 		   "j_list_bitmap_index: \t%i\n"
337 		   "j_must_wait: \t%i\n"
338 		   "j_next_full_flush: \t%i\n"
339 		   "j_next_async_flush: \t%i\n"
340 		   "j_cnode_used: \t%i\n" "j_cnode_free: \t%i\n" "\n"
341 		   /* reiserfs_proc_info_data_t.journal fields */
342 		   "in_journal: \t%12lu\n"
343 		   "in_journal_bitmap: \t%12lu\n"
344 		   "in_journal_reusable: \t%12lu\n"
345 		   "lock_journal: \t%12lu\n"
346 		   "lock_journal_wait: \t%12lu\n"
347 		   "journal_begin: \t%12lu\n"
348 		   "journal_relock_writers: \t%12lu\n"
349 		   "journal_relock_wcount: \t%12lu\n"
350 		   "mark_dirty: \t%12lu\n"
351 		   "mark_dirty_already: \t%12lu\n"
352 		   "mark_dirty_notjournal: \t%12lu\n"
353 		   "restore_prepared: \t%12lu\n"
354 		   "prepare: \t%12lu\n"
355 		   "prepare_retry: \t%12lu\n",
356 		   DJP(jp_journal_1st_block),
357 		   SB_JOURNAL(sb)->j_dev_bd,
358 		   DJP(jp_journal_dev),
359 		   DJP(jp_journal_size),
360 		   DJP(jp_journal_trans_max),
361 		   DJP(jp_journal_magic),
362 		   DJP(jp_journal_max_batch),
363 		   SB_JOURNAL(sb)->j_max_commit_age,
364 		   DJP(jp_journal_max_trans_age),
365 		   JF(j_1st_reserved_block),
366 		   JF(j_state),
367 		   JF(j_trans_id),
368 		   JF(j_mount_id),
369 		   JF(j_start),
370 		   JF(j_len),
371 		   JF(j_len_alloc),
372 		   atomic_read(&r->s_journal->j_wcount),
373 		   JF(j_bcount),
374 		   JF(j_first_unflushed_offset),
375 		   JF(j_last_flush_trans_id),
376 		   ktime_mono_to_real_seconds(JF(j_trans_start_time)),
377 		   JF(j_list_bitmap_index),
378 		   JF(j_must_wait),
379 		   JF(j_next_full_flush),
380 		   JF(j_next_async_flush),
381 		   JF(j_cnode_used),
382 		   JF(j_cnode_free),
383 		   SFPJ(in_journal),
384 		   SFPJ(in_journal_bitmap),
385 		   SFPJ(in_journal_reusable),
386 		   SFPJ(lock_journal),
387 		   SFPJ(lock_journal_wait),
388 		   SFPJ(journal_being),
389 		   SFPJ(journal_relock_writers),
390 		   SFPJ(journal_relock_wcount),
391 		   SFPJ(mark_dirty),
392 		   SFPJ(mark_dirty_already),
393 		   SFPJ(mark_dirty_notjournal),
394 		   SFPJ(restore_prepared), SFPJ(prepare), SFPJ(prepare_retry)
395 	    );
396 	return 0;
397 }
398 
399 static struct proc_dir_entry *proc_info_root = NULL;
400 static const char proc_info_root_name[] = "fs/reiserfs";
401 
add_file(struct super_block * sb,char * name,int (* func)(struct seq_file *,void *))402 static void add_file(struct super_block *sb, char *name,
403 		     int (*func) (struct seq_file *, void *))
404 {
405 	proc_create_single_data(name, 0, REISERFS_SB(sb)->procdir, func, sb);
406 }
407 
reiserfs_proc_info_init(struct super_block * sb)408 int reiserfs_proc_info_init(struct super_block *sb)
409 {
410 	char b[BDEVNAME_SIZE];
411 	char *s;
412 
413 	/* Some block devices use /'s */
414 	strscpy(b, sb->s_id, BDEVNAME_SIZE);
415 	s = strchr(b, '/');
416 	if (s)
417 		*s = '!';
418 
419 	spin_lock_init(&__PINFO(sb).lock);
420 	REISERFS_SB(sb)->procdir = proc_mkdir_data(b, 0, proc_info_root, sb);
421 	if (REISERFS_SB(sb)->procdir) {
422 		add_file(sb, "version", show_version);
423 		add_file(sb, "super", show_super);
424 		add_file(sb, "per-level", show_per_level);
425 		add_file(sb, "bitmap", show_bitmap);
426 		add_file(sb, "on-disk-super", show_on_disk_super);
427 		add_file(sb, "oidmap", show_oidmap);
428 		add_file(sb, "journal", show_journal);
429 		return 0;
430 	}
431 	reiserfs_warning(sb, "cannot create /proc/%s/%s",
432 			 proc_info_root_name, b);
433 	return 1;
434 }
435 
reiserfs_proc_info_done(struct super_block * sb)436 int reiserfs_proc_info_done(struct super_block *sb)
437 {
438 	struct proc_dir_entry *de = REISERFS_SB(sb)->procdir;
439 	if (de) {
440 		char b[BDEVNAME_SIZE];
441 		char *s;
442 
443 		/* Some block devices use /'s */
444 		strscpy(b, sb->s_id, BDEVNAME_SIZE);
445 		s = strchr(b, '/');
446 		if (s)
447 			*s = '!';
448 
449 		remove_proc_subtree(b, proc_info_root);
450 		REISERFS_SB(sb)->procdir = NULL;
451 	}
452 	return 0;
453 }
454 
reiserfs_proc_info_global_init(void)455 int reiserfs_proc_info_global_init(void)
456 {
457 	if (proc_info_root == NULL) {
458 		proc_info_root = proc_mkdir(proc_info_root_name, NULL);
459 		if (!proc_info_root) {
460 			reiserfs_warning(NULL, "cannot create /proc/%s",
461 					 proc_info_root_name);
462 			return 1;
463 		}
464 	}
465 	return 0;
466 }
467 
reiserfs_proc_info_global_done(void)468 int reiserfs_proc_info_global_done(void)
469 {
470 	if (proc_info_root != NULL) {
471 		proc_info_root = NULL;
472 		remove_proc_entry(proc_info_root_name, NULL);
473 	}
474 	return 0;
475 }
476 /*
477  * Revision 1.1.8.2  2001/07/15 17:08:42  god
478  *  . use get_super() in procfs.c
479  *  . remove remove_save_link() from reiserfs_do_truncate()
480  *
481  * I accept terms and conditions stated in the Legal Agreement
482  * (available at http://www.namesys.com/legalese.html)
483  *
484  * Revision 1.1.8.1  2001/07/11 16:48:50  god
485  * proc info support
486  *
487  * I accept terms and conditions stated in the Legal Agreement
488  * (available at http://www.namesys.com/legalese.html)
489  *
490  */
491