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
26static 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
70static 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
133static 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
192static 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
225static 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
269static 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
300static 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	char b[BDEVNAME_SIZE];
307
308	seq_printf(m,		/* on-disk fields */
309		   "jp_journal_1st_block: \t%i\n"
310		   "jp_journal_dev: \t%s[%x]\n"
311		   "jp_journal_size: \t%i\n"
312		   "jp_journal_trans_max: \t%i\n"
313		   "jp_journal_magic: \t%i\n"
314		   "jp_journal_max_batch: \t%i\n"
315		   "jp_journal_max_commit_age: \t%i\n"
316		   "jp_journal_max_trans_age: \t%i\n"
317		   /* incore fields */
318		   "j_1st_reserved_block: \t%i\n"
319		   "j_state: \t%li\n"
320		   "j_trans_id: \t%u\n"
321		   "j_mount_id: \t%lu\n"
322		   "j_start: \t%lu\n"
323		   "j_len: \t%lu\n"
324		   "j_len_alloc: \t%lu\n"
325		   "j_wcount: \t%i\n"
326		   "j_bcount: \t%lu\n"
327		   "j_first_unflushed_offset: \t%lu\n"
328		   "j_last_flush_trans_id: \t%u\n"
329		   "j_trans_start_time: \t%li\n"
330		   "j_list_bitmap_index: \t%i\n"
331		   "j_must_wait: \t%i\n"
332		   "j_next_full_flush: \t%i\n"
333		   "j_next_async_flush: \t%i\n"
334		   "j_cnode_used: \t%i\n" "j_cnode_free: \t%i\n" "\n"
335		   /* reiserfs_proc_info_data_t.journal fields */
336		   "in_journal: \t%12lu\n"
337		   "in_journal_bitmap: \t%12lu\n"
338		   "in_journal_reusable: \t%12lu\n"
339		   "lock_journal: \t%12lu\n"
340		   "lock_journal_wait: \t%12lu\n"
341		   "journal_begin: \t%12lu\n"
342		   "journal_relock_writers: \t%12lu\n"
343		   "journal_relock_wcount: \t%12lu\n"
344		   "mark_dirty: \t%12lu\n"
345		   "mark_dirty_already: \t%12lu\n"
346		   "mark_dirty_notjournal: \t%12lu\n"
347		   "restore_prepared: \t%12lu\n"
348		   "prepare: \t%12lu\n"
349		   "prepare_retry: \t%12lu\n",
350		   DJP(jp_journal_1st_block),
351		   bdevname(SB_JOURNAL(sb)->j_dev_bd, b),
352		   DJP(jp_journal_dev),
353		   DJP(jp_journal_size),
354		   DJP(jp_journal_trans_max),
355		   DJP(jp_journal_magic),
356		   DJP(jp_journal_max_batch),
357		   SB_JOURNAL(sb)->j_max_commit_age,
358		   DJP(jp_journal_max_trans_age),
359		   JF(j_1st_reserved_block),
360		   JF(j_state),
361		   JF(j_trans_id),
362		   JF(j_mount_id),
363		   JF(j_start),
364		   JF(j_len),
365		   JF(j_len_alloc),
366		   atomic_read(&r->s_journal->j_wcount),
367		   JF(j_bcount),
368		   JF(j_first_unflushed_offset),
369		   JF(j_last_flush_trans_id),
370		   JF(j_trans_start_time),
371		   JF(j_list_bitmap_index),
372		   JF(j_must_wait),
373		   JF(j_next_full_flush),
374		   JF(j_next_async_flush),
375		   JF(j_cnode_used),
376		   JF(j_cnode_free),
377		   SFPJ(in_journal),
378		   SFPJ(in_journal_bitmap),
379		   SFPJ(in_journal_reusable),
380		   SFPJ(lock_journal),
381		   SFPJ(lock_journal_wait),
382		   SFPJ(journal_being),
383		   SFPJ(journal_relock_writers),
384		   SFPJ(journal_relock_wcount),
385		   SFPJ(mark_dirty),
386		   SFPJ(mark_dirty_already),
387		   SFPJ(mark_dirty_notjournal),
388		   SFPJ(restore_prepared), SFPJ(prepare), SFPJ(prepare_retry)
389	    );
390	return 0;
391}
392
393static int r_open(struct inode *inode, struct file *file)
394{
395	return single_open(file, PDE_DATA(inode),
396				proc_get_parent_data(inode));
397}
398
399static const struct file_operations r_file_operations = {
400	.open = r_open,
401	.read = seq_read,
402	.llseek = seq_lseek,
403	.release = single_release,
404};
405
406static struct proc_dir_entry *proc_info_root = NULL;
407static const char proc_info_root_name[] = "fs/reiserfs";
408
409static void add_file(struct super_block *sb, char *name,
410		     int (*func) (struct seq_file *, void *))
411{
412	proc_create_data(name, 0, REISERFS_SB(sb)->procdir,
413			 &r_file_operations, func);
414}
415
416int reiserfs_proc_info_init(struct super_block *sb)
417{
418	char b[BDEVNAME_SIZE];
419	char *s;
420
421	/* Some block devices use /'s */
422	strlcpy(b, sb->s_id, BDEVNAME_SIZE);
423	s = strchr(b, '/');
424	if (s)
425		*s = '!';
426
427	spin_lock_init(&__PINFO(sb).lock);
428	REISERFS_SB(sb)->procdir = proc_mkdir_data(b, 0, proc_info_root, sb);
429	if (REISERFS_SB(sb)->procdir) {
430		add_file(sb, "version", show_version);
431		add_file(sb, "super", show_super);
432		add_file(sb, "per-level", show_per_level);
433		add_file(sb, "bitmap", show_bitmap);
434		add_file(sb, "on-disk-super", show_on_disk_super);
435		add_file(sb, "oidmap", show_oidmap);
436		add_file(sb, "journal", show_journal);
437		return 0;
438	}
439	reiserfs_warning(sb, "cannot create /proc/%s/%s",
440			 proc_info_root_name, b);
441	return 1;
442}
443
444int reiserfs_proc_info_done(struct super_block *sb)
445{
446	struct proc_dir_entry *de = REISERFS_SB(sb)->procdir;
447	if (de) {
448		char b[BDEVNAME_SIZE];
449		char *s;
450
451		/* Some block devices use /'s */
452		strlcpy(b, sb->s_id, BDEVNAME_SIZE);
453		s = strchr(b, '/');
454		if (s)
455			*s = '!';
456
457		remove_proc_subtree(b, proc_info_root);
458		REISERFS_SB(sb)->procdir = NULL;
459	}
460	return 0;
461}
462
463int reiserfs_proc_info_global_init(void)
464{
465	if (proc_info_root == NULL) {
466		proc_info_root = proc_mkdir(proc_info_root_name, NULL);
467		if (!proc_info_root) {
468			reiserfs_warning(NULL, "cannot create /proc/%s",
469					 proc_info_root_name);
470			return 1;
471		}
472	}
473	return 0;
474}
475
476int reiserfs_proc_info_global_done(void)
477{
478	if (proc_info_root != NULL) {
479		proc_info_root = NULL;
480		remove_proc_entry(proc_info_root_name, NULL);
481	}
482	return 0;
483}
484/*
485 * Revision 1.1.8.2  2001/07/15 17:08:42  god
486 *  . use get_super() in procfs.c
487 *  . remove remove_save_link() from reiserfs_do_truncate()
488 *
489 * I accept terms and conditions stated in the Legal Agreement
490 * (available at http://www.namesys.com/legalese.html)
491 *
492 * Revision 1.1.8.1  2001/07/11 16:48:50  god
493 * proc info support
494 *
495 * I accept terms and conditions stated in the Legal Agreement
496 * (available at http://www.namesys.com/legalese.html)
497 *
498 */
499
500/*
501 * Make Linus happy.
502 * Local variables:
503 * c-indentation-style: "K&R"
504 * mode-name: "LC"
505 * c-basic-offset: 8
506 * tab-width: 8
507 * End:
508 */
509