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TOMOYO Linux Cross Reference
Linux/fs/reiserfs/procfs.c

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  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  */
508 

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