fs/reiserfs/procfs.c - kernel/msm - Gitiles

 /* -*- linux-c -*- */

 /* fs/reiserfs/procfs.c */

 /*
  * Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README
  */

 /* proc info support a la one created by Sizif@Botik.RU for PGC */

 /* $Id: procfs.c,v 1.1.8.2 2001/07/15 17:08:42 god Exp $ */

 #include <linux/module.h>
 #include <linux/time.h>
 #include <linux/seq_file.h>
 #include <asm/uaccess.h>
 #include <linux/reiserfs_fs.h>
 #include <linux/reiserfs_fs_sb.h>
 #include <linux/init.h>
 #include <linux/proc_fs.h>

 #ifdef CONFIG_REISERFS_PROC_INFO

 /*
  * LOCKING:
  *
  * We rely on new Alexander Viro's super-block locking.
  *
  */

 static int show_version(struct seq_file *m, struct super_block *sb)
 {
 	char *format;

 	if (REISERFS_SB(sb)->s_properties & (1 << REISERFS_3_6)) {
 		format = "3.6";
 	} else if (REISERFS_SB(sb)->s_properties & (1 << REISERFS_3_5)) {
 		format = "3.5";
 	} else {
 		format = "unknown";
 	}

 	seq_printf(m, "%s format\twith checks %s\n", format,
 #if defined( CONFIG_REISERFS_CHECK )
 		   "on"
 #else
 		   "off"
 #endif
 	    );
 	return 0;
 }

 int reiserfs_global_version_in_proc(char *buffer, char **start, off_t offset,
 				    int count, int *eof, void *data)
 {
 	*start = buffer;
 	*eof = 1;
 	return 0;
 }

 #define SF( x ) ( r -> x )
 #define SFP( x ) SF( s_proc_info_data.x )
 #define SFPL( x ) SFP( x[ level ] )
 #define SFPF( x ) SFP( scan_bitmap.x )
 #define SFPJ( x ) SFP( journal.x )

 #define D2C( x ) le16_to_cpu( x )
 #define D4C( x ) le32_to_cpu( x )
 #define DF( x ) D2C( rs -> s_v1.x )
 #define DFL( x ) D4C( rs -> s_v1.x )

 #define objectid_map( s, rs ) (old_format_only (s) ?				\
                          (__le32 *)((struct reiserfs_super_block_v1 *)rs + 1) :	\
 			 (__le32 *)(rs + 1))
 #define MAP( i ) D4C( objectid_map( sb, rs )[ i ] )

 #define DJF( x ) le32_to_cpu( rs -> x )
 #define DJV( x ) le32_to_cpu( s_v1 -> x )
 #define DJP( x ) le32_to_cpu( jp -> x )
 #define JF( x ) ( r -> s_journal -> x )

 static int show_super(struct seq_file *m, struct super_block *sb)
 {
 	struct reiserfs_sb_info *r = REISERFS_SB(sb);

 	seq_printf(m, "state: \t%s\n"
 		   "mount options: \t%s%s%s%s%s%s%s%s%s%s%s\n"
 		   "gen. counter: \t%i\n"
 		   "s_disk_reads: \t%i\n"
 		   "s_disk_writes: \t%i\n"
 		   "s_fix_nodes: \t%i\n"
 		   "s_do_balance: \t%i\n"
 		   "s_unneeded_left_neighbor: \t%i\n"
 		   "s_good_search_by_key_reada: \t%i\n"
 		   "s_bmaps: \t%i\n"
 		   "s_bmaps_without_search: \t%i\n"
 		   "s_direct2indirect: \t%i\n"
 		   "s_indirect2direct: \t%i\n"
 		   "\n"
 		   "max_hash_collisions: \t%i\n"
 		   "breads: \t%lu\n"
 		   "bread_misses: \t%lu\n"
 		   "search_by_key: \t%lu\n"
 		   "search_by_key_fs_changed: \t%lu\n"
 		   "search_by_key_restarted: \t%lu\n"
 		   "insert_item_restarted: \t%lu\n"
 		   "paste_into_item_restarted: \t%lu\n"
 		   "cut_from_item_restarted: \t%lu\n"
 		   "delete_solid_item_restarted: \t%lu\n"
 		   "delete_item_restarted: \t%lu\n"
 		   "leaked_oid: \t%lu\n"
 		   "leaves_removable: \t%lu\n",
 		   SF(s_mount_state) == REISERFS_VALID_FS ?
 		   "REISERFS_VALID_FS" : "REISERFS_ERROR_FS",
 		   reiserfs_r5_hash(sb) ? "FORCE_R5 " : "",
 		   reiserfs_rupasov_hash(sb) ? "FORCE_RUPASOV " : "",
 		   reiserfs_tea_hash(sb) ? "FORCE_TEA " : "",
 		   reiserfs_hash_detect(sb) ? "DETECT_HASH " : "",
 		   reiserfs_no_border(sb) ? "NO_BORDER " : "BORDER ",
 		   reiserfs_no_unhashed_relocation(sb) ?
 		   "NO_UNHASHED_RELOCATION " : "",
 		   reiserfs_hashed_relocation(sb) ? "UNHASHED_RELOCATION " : "",
 		   reiserfs_test4(sb) ? "TEST4 " : "",
 		   have_large_tails(sb) ? "TAILS " : have_small_tails(sb) ?
 		   "SMALL_TAILS " : "NO_TAILS ",
 		   replay_only(sb) ? "REPLAY_ONLY " : "",
 		   convert_reiserfs(sb) ? "CONV " : "",
 		   atomic_read(&r->s_generation_counter),
 		   SF(s_disk_reads), SF(s_disk_writes), SF(s_fix_nodes),
 		   SF(s_do_balance), SF(s_unneeded_left_neighbor),
 		   SF(s_good_search_by_key_reada), SF(s_bmaps),
 		   SF(s_bmaps_without_search), SF(s_direct2indirect),
 		   SF(s_indirect2direct), SFP(max_hash_collisions), SFP(breads),
 		   SFP(bread_miss), SFP(search_by_key),
 		   SFP(search_by_key_fs_changed), SFP(search_by_key_restarted),
 		   SFP(insert_item_restarted), SFP(paste_into_item_restarted),
 		   SFP(cut_from_item_restarted),
 		   SFP(delete_solid_item_restarted), SFP(delete_item_restarted),
 		   SFP(leaked_oid), SFP(leaves_removable));

 	return 0;
 }

 static int show_per_level(struct seq_file *m, struct super_block *sb)
 {
 	struct reiserfs_sb_info *r = REISERFS_SB(sb);
 	int level;

 	seq_printf(m, "level\t"
 		   "     balances"
 		   " [sbk:  reads"
 		   "   fs_changed"
 		   "   restarted]"
 		   "   free space"
 		   "        items"
 		   "   can_remove"
 		   "         lnum"
 		   "         rnum"
 		   "       lbytes"
 		   "       rbytes"
 		   "     get_neig"
 		   " get_neig_res" "  need_l_neig" "  need_r_neig" "\n");

 	for (level = 0; level < MAX_HEIGHT; ++level) {
 		seq_printf(m, "%i\t"
 			   " %12lu"
 			   " %12lu"
 			   " %12lu"
 			   " %12lu"
 			   " %12lu"
 			   " %12lu"
 			   " %12lu"
 			   " %12li"
 			   " %12li"
 			   " %12li"
 			   " %12li"
 			   " %12lu"
 			   " %12lu"
 			   " %12lu"
 			   " %12lu"
 			   "\n",
 			   level,
 			   SFPL(balance_at),
 			   SFPL(sbk_read_at),
 			   SFPL(sbk_fs_changed),
 			   SFPL(sbk_restarted),
 			   SFPL(free_at),
 			   SFPL(items_at),
 			   SFPL(can_node_be_removed),
 			   SFPL(lnum),
 			   SFPL(rnum),
 			   SFPL(lbytes),
 			   SFPL(rbytes),
 			   SFPL(get_neighbors),
 			   SFPL(get_neighbors_restart),
 			   SFPL(need_l_neighbor), SFPL(need_r_neighbor)
 		    );
 	}
 	return 0;
 }

 static int show_bitmap(struct seq_file *m, struct super_block *sb)
 {
 	struct reiserfs_sb_info *r = REISERFS_SB(sb);

 	seq_printf(m, "free_block: %lu\n"
 		   "  scan_bitmap:"
 		   "          wait"
 		   "          bmap"
 		   "         retry"
 		   "        stolen"
 		   "  journal_hint"
 		   "journal_nohint"
 		   "\n"
 		   " %14lu"
 		   " %14lu"
 		   " %14lu"
 		   " %14lu"
 		   " %14lu"
 		   " %14lu"
 		   " %14lu"
 		   "\n",
 		   SFP(free_block),
 		   SFPF(call),
 		   SFPF(wait),
 		   SFPF(bmap),
 		   SFPF(retry),
 		   SFPF(stolen),
 		   SFPF(in_journal_hint), SFPF(in_journal_nohint));

 	return 0;
 }

 static int show_on_disk_super(struct seq_file *m, struct super_block *sb)
 {
 	struct reiserfs_sb_info *sb_info = REISERFS_SB(sb);
 	struct reiserfs_super_block *rs = sb_info->s_rs;
 	int hash_code = DFL(s_hash_function_code);
 	__u32 flags = DJF(s_flags);

 	seq_printf(m, "block_count: \t%i\n"
 		   "free_blocks: \t%i\n"
 		   "root_block: \t%i\n"
 		   "blocksize: \t%i\n"
 		   "oid_maxsize: \t%i\n"
 		   "oid_cursize: \t%i\n"
 		   "umount_state: \t%i\n"
 		   "magic: \t%10.10s\n"
 		   "fs_state: \t%i\n"
 		   "hash: \t%s\n"
 		   "tree_height: \t%i\n"
 		   "bmap_nr: \t%i\n"
 		   "version: \t%i\n"
 		   "flags: \t%x[%s]\n"
 		   "reserved_for_journal: \t%i\n",
 		   DFL(s_block_count),
 		   DFL(s_free_blocks),
 		   DFL(s_root_block),
 		   DF(s_blocksize),
 		   DF(s_oid_maxsize),
 		   DF(s_oid_cursize),
 		   DF(s_umount_state),
 		   rs->s_v1.s_magic,
 		   DF(s_fs_state),
 		   hash_code == TEA_HASH ? "tea" :
 		   (hash_code == YURA_HASH) ? "rupasov" :
 		   (hash_code == R5_HASH) ? "r5" :
 		   (hash_code == UNSET_HASH) ? "unset" : "unknown",
 		   DF(s_tree_height),
 		   DF(s_bmap_nr),
 		   DF(s_version), flags, (flags & reiserfs_attrs_cleared)
 		   ? "attrs_cleared" : "", DF(s_reserved_for_journal));

 	return 0;
 }

 static int show_oidmap(struct seq_file *m, struct super_block *sb)
 {
 	struct reiserfs_sb_info *sb_info = REISERFS_SB(sb);
 	struct reiserfs_super_block *rs = sb_info->s_rs;
 	unsigned int mapsize = le16_to_cpu(rs->s_v1.s_oid_cursize);
 	unsigned long total_used = 0;
 	int i;

 	for (i = 0; i < mapsize; ++i) {
 		__u32 right;

 		right = (i == mapsize - 1) ? MAX_KEY_OBJECTID : MAP(i + 1);
 		seq_printf(m, "%s: [ %x .. %x )\n",
 			   (i & 1) ? "free" : "used", MAP(i), right);
 		if (!(i & 1)) {
 			total_used += right - MAP(i);
 		}
 	}
 #if defined( REISERFS_USE_OIDMAPF )
 	if (sb_info->oidmap.use_file && (sb_info->oidmap.mapf != NULL)) {
 		loff_t size = sb_info->oidmap.mapf->f_path.dentry->d_inode->i_size;
 		total_used += size / sizeof(reiserfs_oidinterval_d_t);
 	}
 #endif
 	seq_printf(m, "total: \t%i [%i/%i] used: %lu [exact]\n",
 		   mapsize,
 		   mapsize, le16_to_cpu(rs->s_v1.s_oid_maxsize), total_used);
 	return 0;
 }

 static int show_journal(struct seq_file *m, struct super_block *sb)
 {
 	struct reiserfs_sb_info *r = REISERFS_SB(sb);
 	struct reiserfs_super_block *rs = r->s_rs;
 	struct journal_params *jp = &rs->s_v1.s_journal;
 	char b[BDEVNAME_SIZE];

 	seq_printf(m,		/* on-disk fields */
 		   "jp_journal_1st_block: \t%i\n"
 		   "jp_journal_dev: \t%s[%x]\n"
 		   "jp_journal_size: \t%i\n"
 		   "jp_journal_trans_max: \t%i\n"
 		   "jp_journal_magic: \t%i\n"
 		   "jp_journal_max_batch: \t%i\n"
 		   "jp_journal_max_commit_age: \t%i\n"
 		   "jp_journal_max_trans_age: \t%i\n"
 		   /* incore fields */
 		   "j_1st_reserved_block: \t%i\n"
 		   "j_state: \t%li\n"
 		   "j_trans_id: \t%lu\n"
 		   "j_mount_id: \t%lu\n"
 		   "j_start: \t%lu\n"
 		   "j_len: \t%lu\n"
 		   "j_len_alloc: \t%lu\n"
 		   "j_wcount: \t%i\n"
 		   "j_bcount: \t%lu\n"
 		   "j_first_unflushed_offset: \t%lu\n"
 		   "j_last_flush_trans_id: \t%lu\n"
 		   "j_trans_start_time: \t%li\n"
 		   "j_list_bitmap_index: \t%i\n"
 		   "j_must_wait: \t%i\n"
 		   "j_next_full_flush: \t%i\n"
 		   "j_next_async_flush: \t%i\n"
 		   "j_cnode_used: \t%i\n" "j_cnode_free: \t%i\n" "\n"
 		   /* reiserfs_proc_info_data_t.journal fields */
 		   "in_journal: \t%12lu\n"
 		   "in_journal_bitmap: \t%12lu\n"
 		   "in_journal_reusable: \t%12lu\n"
 		   "lock_journal: \t%12lu\n"
 		   "lock_journal_wait: \t%12lu\n"
 		   "journal_begin: \t%12lu\n"
 		   "journal_relock_writers: \t%12lu\n"
 		   "journal_relock_wcount: \t%12lu\n"
 		   "mark_dirty: \t%12lu\n"
 		   "mark_dirty_already: \t%12lu\n"
 		   "mark_dirty_notjournal: \t%12lu\n"
 		   "restore_prepared: \t%12lu\n"
 		   "prepare: \t%12lu\n"
 		   "prepare_retry: \t%12lu\n",
 		   DJP(jp_journal_1st_block),
 		   bdevname(SB_JOURNAL(sb)->j_dev_bd, b),
 		   DJP(jp_journal_dev),
 		   DJP(jp_journal_size),
 		   DJP(jp_journal_trans_max),
 		   DJP(jp_journal_magic),
 		   DJP(jp_journal_max_batch),
 		   SB_JOURNAL(sb)->j_max_commit_age,
 		   DJP(jp_journal_max_trans_age),
 		   JF(j_1st_reserved_block),
 		   JF(j_state),
 		   JF(j_trans_id),
 		   JF(j_mount_id),
 		   JF(j_start),
 		   JF(j_len),
 		   JF(j_len_alloc),
 		   atomic_read(&r->s_journal->j_wcount),
 		   JF(j_bcount),
 		   JF(j_first_unflushed_offset),
 		   JF(j_last_flush_trans_id),
 		   JF(j_trans_start_time),
 		   JF(j_list_bitmap_index),
 		   JF(j_must_wait),
 		   JF(j_next_full_flush),
 		   JF(j_next_async_flush),
 		   JF(j_cnode_used),
 		   JF(j_cnode_free),
 		   SFPJ(in_journal),
 		   SFPJ(in_journal_bitmap),
 		   SFPJ(in_journal_reusable),
 		   SFPJ(lock_journal),
 		   SFPJ(lock_journal_wait),
 		   SFPJ(journal_being),
 		   SFPJ(journal_relock_writers),
 		   SFPJ(journal_relock_wcount),
 		   SFPJ(mark_dirty),
 		   SFPJ(mark_dirty_already),
 		   SFPJ(mark_dirty_notjournal),
 		   SFPJ(restore_prepared), SFPJ(prepare), SFPJ(prepare_retry)
 	    );
 	return 0;
 }

 /* iterator */
 static int test_sb(struct super_block *sb, void *data)
 {
 	return data == sb;
 }

 static int set_sb(struct super_block *sb, void *data)
 {
 	return -ENOENT;
 }

 static void *r_start(struct seq_file *m, loff_t * pos)
 {
 	struct proc_dir_entry *de = m->private;
 	struct super_block *s = de->parent->data;
 	loff_t l = *pos;

 	if (l)
 		return NULL;

 	if (IS_ERR(sget(&reiserfs_fs_type, test_sb, set_sb, s)))
 		return NULL;

 	up_write(&s->s_umount);
 	return s;
 }

 static void *r_next(struct seq_file *m, void *v, loff_t * pos)
 {
 	++*pos;
 	if (v)
 		deactivate_super(v);
 	return NULL;
 }

 static void r_stop(struct seq_file *m, void *v)
 {
 	if (v)
 		deactivate_super(v);
 }

 static int r_show(struct seq_file *m, void *v)
 {
 	struct proc_dir_entry *de = m->private;
 	int (*show) (struct seq_file *, struct super_block *) = de->data;
 	return show(m, v);
 }

 static const struct seq_operations r_ops = {
 	.start = r_start,
 	.next = r_next,
 	.stop = r_stop,
 	.show = r_show,
 };

 static int r_open(struct inode *inode, struct file *file)
 {
 	int ret = seq_open(file, &r_ops);

 	if (!ret) {
 		struct seq_file *m = file->private_data;
 		m->private = PDE(inode);
 	}
 	return ret;
 }

 static const struct file_operations r_file_operations = {
 	.open = r_open,
 	.read = seq_read,
 	.llseek = seq_lseek,
 	.release = seq_release,
 	.owner = THIS_MODULE,
 };

 static struct proc_dir_entry *proc_info_root = NULL;
 static const char proc_info_root_name[] = "fs/reiserfs";

 static void add_file(struct super_block *sb, char *name,
 		     int (*func) (struct seq_file *, struct super_block *))
 {
 	proc_create_data(name, 0, REISERFS_SB(sb)->procdir,
 			 &r_file_operations, func);
 }

 int reiserfs_proc_info_init(struct super_block *sb)
 {
 	char b[BDEVNAME_SIZE];
 	char *s;

 	/* Some block devices use /'s */
 	strlcpy(b, reiserfs_bdevname(sb), BDEVNAME_SIZE);
 	s = strchr(b, '/');
 	if (s)
 		*s = '!';

 	spin_lock_init(&__PINFO(sb).lock);
 	REISERFS_SB(sb)->procdir = proc_mkdir(b, proc_info_root);
 	if (REISERFS_SB(sb)->procdir) {
 		REISERFS_SB(sb)->procdir->owner = THIS_MODULE;
 		REISERFS_SB(sb)->procdir->data = sb;
 		add_file(sb, "version", show_version);
 		add_file(sb, "super", show_super);
 		add_file(sb, "per-level", show_per_level);
 		add_file(sb, "bitmap", show_bitmap);
 		add_file(sb, "on-disk-super", show_on_disk_super);
 		add_file(sb, "oidmap", show_oidmap);
 		add_file(sb, "journal", show_journal);
 		return 0;
 	}
 	reiserfs_warning(sb, "reiserfs: cannot create /proc/%s/%s",
 			 proc_info_root_name, b);
 	return 1;
 }

 int reiserfs_proc_info_done(struct super_block *sb)
 {
 	struct proc_dir_entry *de = REISERFS_SB(sb)->procdir;
 	char b[BDEVNAME_SIZE];
 	char *s;

 	/* Some block devices use /'s */
 	strlcpy(b, reiserfs_bdevname(sb), BDEVNAME_SIZE);
 	s = strchr(b, '/');
 	if (s)
 		*s = '!';

 	if (de) {
 		remove_proc_entry("journal", de);
 		remove_proc_entry("oidmap", de);
 		remove_proc_entry("on-disk-super", de);
 		remove_proc_entry("bitmap", de);
 		remove_proc_entry("per-level", de);
 		remove_proc_entry("super", de);
 		remove_proc_entry("version", de);
 	}
 	spin_lock(&__PINFO(sb).lock);
 	__PINFO(sb).exiting = 1;
 	spin_unlock(&__PINFO(sb).lock);
 	if (proc_info_root) {
 		remove_proc_entry(b, proc_info_root);
 		REISERFS_SB(sb)->procdir = NULL;
 	}
 	return 0;
 }

 struct proc_dir_entry *reiserfs_proc_register_global(char *name,
 						     read_proc_t * func)
 {
 	return (proc_info_root) ? create_proc_read_entry(name, 0,
 							 proc_info_root,
 							 func, NULL) : NULL;
 }

 void reiserfs_proc_unregister_global(const char *name)
 {
 	remove_proc_entry(name, proc_info_root);
 }

 int reiserfs_proc_info_global_init(void)
 {
 	if (proc_info_root == NULL) {
 		proc_info_root = proc_mkdir(proc_info_root_name, NULL);
 		if (proc_info_root) {
 			proc_info_root->owner = THIS_MODULE;
 		} else {
 			reiserfs_warning(NULL,
 					 "reiserfs: cannot create /proc/%s",
 					 proc_info_root_name);
 			return 1;
 		}
 	}
 	return 0;
 }

 int reiserfs_proc_info_global_done(void)
 {
 	if (proc_info_root != NULL) {
 		proc_info_root = NULL;
 		remove_proc_entry(proc_info_root_name, NULL);
 	}
 	return 0;
 }

 /* REISERFS_PROC_INFO */
 #else

 int reiserfs_proc_info_init(struct super_block *sb)
 {
 	return 0;
 }
 int reiserfs_proc_info_done(struct super_block *sb)
 {
 	return 0;
 }

 struct proc_dir_entry *reiserfs_proc_register_global(char *name,
 						     read_proc_t * func)
 {
 	return NULL;
 }

 void reiserfs_proc_unregister_global(const char *name)
 {;
 }

 int reiserfs_proc_info_global_init(void)
 {
 	return 0;
 }
 int reiserfs_proc_info_global_done(void)
 {
 	return 0;
 }

 int reiserfs_global_version_in_proc(char *buffer, char **start,
 				    off_t offset,
 				    int count, int *eof, void *data)
 {
 	return 0;
 }

 /* REISERFS_PROC_INFO */
 #endif

 /*
  * $Log: procfs.c,v $
  * Revision 1.1.8.2  2001/07/15 17:08:42  god
  *  . use get_super() in procfs.c
  *  . remove remove_save_link() from reiserfs_do_truncate()
  *
  * I accept terms and conditions stated in the Legal Agreement
  * (available at http://www.namesys.com/legalese.html)
  *
  * Revision 1.1.8.1  2001/07/11 16:48:50  god
  * proc info support
  *
  * I accept terms and conditions stated in the Legal Agreement
  * (available at http://www.namesys.com/legalese.html)
  *
  */

 /*
  * Make Linus happy.
  * Local variables:
  * c-indentation-style: "K&R"
  * mode-name: "LC"
  * c-basic-offset: 8
  * tab-width: 8
  * End:
  */
	/* -- linux-c -- */

	/* fs/reiserfs/procfs.c */

	/*
	* Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README
	*/

	/* proc info support a la one created by Sizif@Botik.RU for PGC */

	/* $Id: procfs.c,v 1.1.8.2 2001/07/15 17:08:42 god Exp $ */

	#include <linux/module.h>
	#include <linux/time.h>
	#include <linux/seq_file.h>
	#include <asm/uaccess.h>
	#include <linux/reiserfs_fs.h>
	#include <linux/reiserfs_fs_sb.h>
	#include <linux/init.h>
	#include <linux/proc_fs.h>

	#ifdef CONFIG_REISERFS_PROC_INFO

	/*
	* LOCKING:
	*
	* We rely on new Alexander Viro's super-block locking.
	*
	*/

	static int show_version(struct seq_file m, struct super_block sb)
	{
	char *format;

	if (REISERFS_SB(sb)->s_properties & (1 << REISERFS_3_6)) {
	format = "3.6";
	} else if (REISERFS_SB(sb)->s_properties & (1 << REISERFS_3_5)) {
	format = "3.5";
	} else {
	format = "unknown";
	}

	seq_printf(m, "%s format\twith checks %s\n", format,
	#if defined( CONFIG_REISERFS_CHECK )
	"on"
	#else
	"off"
	#endif
	);
	return 0;
	}

	int reiserfs_global_version_in_proc(char buffer, char *start, off_t offset,
	int count, int eof, void data)
	{
	*start = buffer;
	*eof = 1;
	return 0;
	}

	#define SF( x ) ( r -> x )
	#define SFP( x ) SF( s_proc_info_data.x )
	#define SFPL( x ) SFP( x[ level ] )
	#define SFPF( x ) SFP( scan_bitmap.x )
	#define SFPJ( x ) SFP( journal.x )

	#define D2C( x ) le16_to_cpu( x )
	#define D4C( x ) le32_to_cpu( x )
	#define DF( x ) D2C( rs -> s_v1.x )
	#define DFL( x ) D4C( rs -> s_v1.x )

	#define objectid_map( s, rs ) (old_format_only (s) ? \
	(__le32 )((struct reiserfs_super_block_v1 )rs + 1) : \
	(__le32 *)(rs + 1))
	#define MAP( i ) D4C( objectid_map( sb, rs )[ i ] )

	#define DJF( x ) le32_to_cpu( rs -> x )
	#define DJV( x ) le32_to_cpu( s_v1 -> x )
	#define DJP( x ) le32_to_cpu( jp -> x )
	#define JF( x ) ( r -> s_journal -> x )

	static int show_super(struct seq_file m, struct super_block sb)
	{
	struct reiserfs_sb_info *r = REISERFS_SB(sb);

	seq_printf(m, "state: \t%s\n"
	"mount options: \t%s%s%s%s%s%s%s%s%s%s%s\n"
	"gen. counter: \t%i\n"
	"s_disk_reads: \t%i\n"
	"s_disk_writes: \t%i\n"
	"s_fix_nodes: \t%i\n"
	"s_do_balance: \t%i\n"
	"s_unneeded_left_neighbor: \t%i\n"
	"s_good_search_by_key_reada: \t%i\n"
	"s_bmaps: \t%i\n"
	"s_bmaps_without_search: \t%i\n"
	"s_direct2indirect: \t%i\n"
	"s_indirect2direct: \t%i\n"
	"\n"
	"max_hash_collisions: \t%i\n"
	"breads: \t%lu\n"
	"bread_misses: \t%lu\n"
	"search_by_key: \t%lu\n"
	"search_by_key_fs_changed: \t%lu\n"
	"search_by_key_restarted: \t%lu\n"
	"insert_item_restarted: \t%lu\n"
	"paste_into_item_restarted: \t%lu\n"
	"cut_from_item_restarted: \t%lu\n"
	"delete_solid_item_restarted: \t%lu\n"
	"delete_item_restarted: \t%lu\n"
	"leaked_oid: \t%lu\n"
	"leaves_removable: \t%lu\n",
	SF(s_mount_state) == REISERFS_VALID_FS ?
	"REISERFS_VALID_FS" : "REISERFS_ERROR_FS",
	reiserfs_r5_hash(sb) ? "FORCE_R5 " : "",
	reiserfs_rupasov_hash(sb) ? "FORCE_RUPASOV " : "",
	reiserfs_tea_hash(sb) ? "FORCE_TEA " : "",
	reiserfs_hash_detect(sb) ? "DETECT_HASH " : "",
	reiserfs_no_border(sb) ? "NO_BORDER " : "BORDER ",
	reiserfs_no_unhashed_relocation(sb) ?
	"NO_UNHASHED_RELOCATION " : "",
	reiserfs_hashed_relocation(sb) ? "UNHASHED_RELOCATION " : "",
	reiserfs_test4(sb) ? "TEST4 " : "",
	have_large_tails(sb) ? "TAILS " : have_small_tails(sb) ?
	"SMALL_TAILS " : "NO_TAILS ",
	replay_only(sb) ? "REPLAY_ONLY " : "",
	convert_reiserfs(sb) ? "CONV " : "",
	atomic_read(&r->s_generation_counter),
	SF(s_disk_reads), SF(s_disk_writes), SF(s_fix_nodes),
	SF(s_do_balance), SF(s_unneeded_left_neighbor),
	SF(s_good_search_by_key_reada), SF(s_bmaps),
	SF(s_bmaps_without_search), SF(s_direct2indirect),
	SF(s_indirect2direct), SFP(max_hash_collisions), SFP(breads),
	SFP(bread_miss), SFP(search_by_key),
	SFP(search_by_key_fs_changed), SFP(search_by_key_restarted),
	SFP(insert_item_restarted), SFP(paste_into_item_restarted),
	SFP(cut_from_item_restarted),
	SFP(delete_solid_item_restarted), SFP(delete_item_restarted),
	SFP(leaked_oid), SFP(leaves_removable));

	return 0;
	}

	static int show_per_level(struct seq_file m, struct super_block sb)
	{
	struct reiserfs_sb_info *r = REISERFS_SB(sb);
	int level;

	seq_printf(m, "level\t"
	" balances"
	" [sbk: reads"
	" fs_changed"
	" restarted]"
	" free space"
	" items"
	" can_remove"
	" lnum"
	" rnum"
	" lbytes"
	" rbytes"
	" get_neig"
	" get_neig_res" " need_l_neig" " need_r_neig" "\n");

	for (level = 0; level < MAX_HEIGHT; ++level) {
	seq_printf(m, "%i\t"
	" %12lu"
	" %12lu"
	" %12lu"
	" %12lu"
	" %12lu"
	" %12lu"
	" %12lu"
	" %12li"
	" %12li"
	" %12li"
	" %12li"
	" %12lu"
	" %12lu"
	" %12lu"
	" %12lu"
	"\n",
	level,
	SFPL(balance_at),
	SFPL(sbk_read_at),
	SFPL(sbk_fs_changed),
	SFPL(sbk_restarted),
	SFPL(free_at),
	SFPL(items_at),
	SFPL(can_node_be_removed),
	SFPL(lnum),
	SFPL(rnum),
	SFPL(lbytes),
	SFPL(rbytes),
	SFPL(get_neighbors),
	SFPL(get_neighbors_restart),
	SFPL(need_l_neighbor), SFPL(need_r_neighbor)
	);
	}
	return 0;
	}

	static int show_bitmap(struct seq_file m, struct super_block sb)
	{
	struct reiserfs_sb_info *r = REISERFS_SB(sb);

	seq_printf(m, "free_block: %lu\n"
	" scan_bitmap:"
	" wait"
	" bmap"
	" retry"
	" stolen"
	" journal_hint"
	"journal_nohint"
	"\n"
	" %14lu"
	" %14lu"
	" %14lu"
	" %14lu"
	" %14lu"
	" %14lu"
	" %14lu"
	"\n",
	SFP(free_block),
	SFPF(call),
	SFPF(wait),
	SFPF(bmap),
	SFPF(retry),
	SFPF(stolen),
	SFPF(in_journal_hint), SFPF(in_journal_nohint));

	return 0;
	}

	static int show_on_disk_super(struct seq_file m, struct super_block sb)
	{
	struct reiserfs_sb_info *sb_info = REISERFS_SB(sb);
	struct reiserfs_super_block *rs = sb_info->s_rs;
	int hash_code = DFL(s_hash_function_code);
	__u32 flags = DJF(s_flags);

	seq_printf(m, "block_count: \t%i\n"
	"free_blocks: \t%i\n"
	"root_block: \t%i\n"
	"blocksize: \t%i\n"
	"oid_maxsize: \t%i\n"
	"oid_cursize: \t%i\n"
	"umount_state: \t%i\n"
	"magic: \t%10.10s\n"
	"fs_state: \t%i\n"
	"hash: \t%s\n"
	"tree_height: \t%i\n"
	"bmap_nr: \t%i\n"
	"version: \t%i\n"
	"flags: \t%x[%s]\n"
	"reserved_for_journal: \t%i\n",
	DFL(s_block_count),
	DFL(s_free_blocks),
	DFL(s_root_block),
	DF(s_blocksize),
	DF(s_oid_maxsize),
	DF(s_oid_cursize),
	DF(s_umount_state),
	rs->s_v1.s_magic,
	DF(s_fs_state),
	hash_code == TEA_HASH ? "tea" :
	(hash_code == YURA_HASH) ? "rupasov" :
	(hash_code == R5_HASH) ? "r5" :
	(hash_code == UNSET_HASH) ? "unset" : "unknown",
	DF(s_tree_height),
	DF(s_bmap_nr),
	DF(s_version), flags, (flags & reiserfs_attrs_cleared)
	? "attrs_cleared" : "", DF(s_reserved_for_journal));

	return 0;
	}

	static int show_oidmap(struct seq_file m, struct super_block sb)
	{
	struct reiserfs_sb_info *sb_info = REISERFS_SB(sb);
	struct reiserfs_super_block *rs = sb_info->s_rs;
	unsigned int mapsize = le16_to_cpu(rs->s_v1.s_oid_cursize);
	unsigned long total_used = 0;
	int i;

	for (i = 0; i < mapsize; ++i) {
	__u32 right;

	right = (i == mapsize - 1) ? MAX_KEY_OBJECTID : MAP(i + 1);
	seq_printf(m, "%s: [ %x .. %x )\n",
	(i & 1) ? "free" : "used", MAP(i), right);
	if (!(i & 1)) {
	total_used += right - MAP(i);
	}
	}
	#if defined( REISERFS_USE_OIDMAPF )
	if (sb_info->oidmap.use_file && (sb_info->oidmap.mapf != NULL)) {
	loff_t size = sb_info->oidmap.mapf->f_path.dentry->d_inode->i_size;
	total_used += size / sizeof(reiserfs_oidinterval_d_t);
	}
	#endif
	seq_printf(m, "total: \t%i [%i/%i] used: %lu [exact]\n",
	mapsize,
	mapsize, le16_to_cpu(rs->s_v1.s_oid_maxsize), total_used);
	return 0;
	}

	static int show_journal(struct seq_file m, struct super_block sb)
	{
	struct reiserfs_sb_info *r = REISERFS_SB(sb);
	struct reiserfs_super_block *rs = r->s_rs;
	struct journal_params *jp = &rs->s_v1.s_journal;
	char b[BDEVNAME_SIZE];

	seq_printf(m, /* on-disk fields */
	"jp_journal_1st_block: \t%i\n"
	"jp_journal_dev: \t%s[%x]\n"
	"jp_journal_size: \t%i\n"
	"jp_journal_trans_max: \t%i\n"
	"jp_journal_magic: \t%i\n"
	"jp_journal_max_batch: \t%i\n"
	"jp_journal_max_commit_age: \t%i\n"
	"jp_journal_max_trans_age: \t%i\n"
	/* incore fields */
	"j_1st_reserved_block: \t%i\n"
	"j_state: \t%li\n"
	"j_trans_id: \t%lu\n"
	"j_mount_id: \t%lu\n"
	"j_start: \t%lu\n"
	"j_len: \t%lu\n"
	"j_len_alloc: \t%lu\n"
	"j_wcount: \t%i\n"
	"j_bcount: \t%lu\n"
	"j_first_unflushed_offset: \t%lu\n"
	"j_last_flush_trans_id: \t%lu\n"
	"j_trans_start_time: \t%li\n"
	"j_list_bitmap_index: \t%i\n"
	"j_must_wait: \t%i\n"
	"j_next_full_flush: \t%i\n"
	"j_next_async_flush: \t%i\n"
	"j_cnode_used: \t%i\n" "j_cnode_free: \t%i\n" "\n"
	/* reiserfs_proc_info_data_t.journal fields */
	"in_journal: \t%12lu\n"
	"in_journal_bitmap: \t%12lu\n"
	"in_journal_reusable: \t%12lu\n"
	"lock_journal: \t%12lu\n"
	"lock_journal_wait: \t%12lu\n"
	"journal_begin: \t%12lu\n"
	"journal_relock_writers: \t%12lu\n"
	"journal_relock_wcount: \t%12lu\n"
	"mark_dirty: \t%12lu\n"
	"mark_dirty_already: \t%12lu\n"
	"mark_dirty_notjournal: \t%12lu\n"
	"restore_prepared: \t%12lu\n"
	"prepare: \t%12lu\n"
	"prepare_retry: \t%12lu\n",
	DJP(jp_journal_1st_block),
	bdevname(SB_JOURNAL(sb)->j_dev_bd, b),
	DJP(jp_journal_dev),
	DJP(jp_journal_size),
	DJP(jp_journal_trans_max),
	DJP(jp_journal_magic),
	DJP(jp_journal_max_batch),
	SB_JOURNAL(sb)->j_max_commit_age,
	DJP(jp_journal_max_trans_age),
	JF(j_1st_reserved_block),
	JF(j_state),
	JF(j_trans_id),
	JF(j_mount_id),
	JF(j_start),
	JF(j_len),
	JF(j_len_alloc),
	atomic_read(&r->s_journal->j_wcount),
	JF(j_bcount),
	JF(j_first_unflushed_offset),
	JF(j_last_flush_trans_id),
	JF(j_trans_start_time),
	JF(j_list_bitmap_index),
	JF(j_must_wait),
	JF(j_next_full_flush),
	JF(j_next_async_flush),
	JF(j_cnode_used),
	JF(j_cnode_free),
	SFPJ(in_journal),
	SFPJ(in_journal_bitmap),
	SFPJ(in_journal_reusable),
	SFPJ(lock_journal),
	SFPJ(lock_journal_wait),
	SFPJ(journal_being),
	SFPJ(journal_relock_writers),
	SFPJ(journal_relock_wcount),
	SFPJ(mark_dirty),
	SFPJ(mark_dirty_already),
	SFPJ(mark_dirty_notjournal),
	SFPJ(restore_prepared), SFPJ(prepare), SFPJ(prepare_retry)
	);
	return 0;
	}

	/* iterator */
	static int test_sb(struct super_block sb, void data)
	{
	return data == sb;
	}

	static int set_sb(struct super_block sb, void data)
	{
	return -ENOENT;
	}

	static void r_start(struct seq_file m, loff_t * pos)
	{
	struct proc_dir_entry *de = m->private;
	struct super_block *s = de->parent->data;
	loff_t l = *pos;

	if (l)
	return NULL;

	if (IS_ERR(sget(&reiserfs_fs_type, test_sb, set_sb, s)))
	return NULL;

	up_write(&s->s_umount);
	return s;
	}

	static void r_next(struct seq_file m, void v, loff_t pos)
	{
	++*pos;
	if (v)
	deactivate_super(v);
	return NULL;
	}

	static void r_stop(struct seq_file m, void v)
	{
	if (v)
	deactivate_super(v);
	}

	static int r_show(struct seq_file m, void v)
	{
	struct proc_dir_entry *de = m->private;
	int (show) (struct seq_file , struct super_block *) = de->data;
	return show(m, v);
	}

	static const struct seq_operations r_ops = {
	.start = r_start,
	.next = r_next,
	.stop = r_stop,
	.show = r_show,
	};

	static int r_open(struct inode inode, struct file file)
	{
	int ret = seq_open(file, &r_ops);

	if (!ret) {
	struct seq_file *m = file->private_data;
	m->private = PDE(inode);
	}
	return ret;
	}

	static const struct file_operations r_file_operations = {
	.open = r_open,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = seq_release,
	.owner = THIS_MODULE,
	};

	static struct proc_dir_entry *proc_info_root = NULL;
	static const char proc_info_root_name[] = "fs/reiserfs";

	static void add_file(struct super_block sb, char name,
	int (func) (struct seq_file , struct super_block *))
	{
	proc_create_data(name, 0, REISERFS_SB(sb)->procdir,
	&r_file_operations, func);
	}

	int reiserfs_proc_info_init(struct super_block *sb)
	{
	char b[BDEVNAME_SIZE];
	char *s;

	/* Some block devices use /'s */
	strlcpy(b, reiserfs_bdevname(sb), BDEVNAME_SIZE);
	s = strchr(b, '/');
	if (s)
	*s = '!';

	spin_lock_init(&__PINFO(sb).lock);
	REISERFS_SB(sb)->procdir = proc_mkdir(b, proc_info_root);
	if (REISERFS_SB(sb)->procdir) {
	REISERFS_SB(sb)->procdir->owner = THIS_MODULE;
	REISERFS_SB(sb)->procdir->data = sb;
	add_file(sb, "version", show_version);
	add_file(sb, "super", show_super);
	add_file(sb, "per-level", show_per_level);
	add_file(sb, "bitmap", show_bitmap);
	add_file(sb, "on-disk-super", show_on_disk_super);
	add_file(sb, "oidmap", show_oidmap);
	add_file(sb, "journal", show_journal);
	return 0;
	}
	reiserfs_warning(sb, "reiserfs: cannot create /proc/%s/%s",
	proc_info_root_name, b);
	return 1;
	}

	int reiserfs_proc_info_done(struct super_block *sb)
	{
	struct proc_dir_entry *de = REISERFS_SB(sb)->procdir;
	char b[BDEVNAME_SIZE];
	char *s;

	/* Some block devices use /'s */
	strlcpy(b, reiserfs_bdevname(sb), BDEVNAME_SIZE);
	s = strchr(b, '/');
	if (s)
	*s = '!';

	if (de) {
	remove_proc_entry("journal", de);
	remove_proc_entry("oidmap", de);
	remove_proc_entry("on-disk-super", de);
	remove_proc_entry("bitmap", de);
	remove_proc_entry("per-level", de);
	remove_proc_entry("super", de);
	remove_proc_entry("version", de);
	}
	spin_lock(&__PINFO(sb).lock);
	__PINFO(sb).exiting = 1;
	spin_unlock(&__PINFO(sb).lock);
	if (proc_info_root) {
	remove_proc_entry(b, proc_info_root);
	REISERFS_SB(sb)->procdir = NULL;
	}
	return 0;
	}

	struct proc_dir_entry reiserfs_proc_register_global(char name,
	read_proc_t * func)
	{
	return (proc_info_root) ? create_proc_read_entry(name, 0,
	proc_info_root,
	func, NULL) : NULL;
	}

	void reiserfs_proc_unregister_global(const char *name)
	{
	remove_proc_entry(name, proc_info_root);
	}

	int reiserfs_proc_info_global_init(void)
	{
	if (proc_info_root == NULL) {
	proc_info_root = proc_mkdir(proc_info_root_name, NULL);
	if (proc_info_root) {
	proc_info_root->owner = THIS_MODULE;
	} else {
	reiserfs_warning(NULL,
	"reiserfs: cannot create /proc/%s",
	proc_info_root_name);
	return 1;
	}
	}
	return 0;
	}

	int reiserfs_proc_info_global_done(void)
	{
	if (proc_info_root != NULL) {
	proc_info_root = NULL;
	remove_proc_entry(proc_info_root_name, NULL);
	}
	return 0;
	}

	/* REISERFS_PROC_INFO */
	#else

	int reiserfs_proc_info_init(struct super_block *sb)
	{
	return 0;
	}
	int reiserfs_proc_info_done(struct super_block *sb)
	{
	return 0;
	}

	struct proc_dir_entry reiserfs_proc_register_global(char name,
	read_proc_t * func)
	{
	return NULL;
	}

	void reiserfs_proc_unregister_global(const char *name)
	{;
	}

	int reiserfs_proc_info_global_init(void)
	{
	return 0;
	}
	int reiserfs_proc_info_global_done(void)
	{
	return 0;
	}

	int reiserfs_global_version_in_proc(char buffer, char *start,
	off_t offset,
	int count, int eof, void data)
	{
	return 0;
	}

	/* REISERFS_PROC_INFO */
	#endif

	/*
	* $Log: procfs.c,v $
	* Revision 1.1.8.2 2001/07/15 17:08:42 god
	* . use get_super() in procfs.c
	* . remove remove_save_link() from reiserfs_do_truncate()
	*
	* I accept terms and conditions stated in the Legal Agreement
	* (available at http://www.namesys.com/legalese.html)
	*
	* Revision 1.1.8.1 2001/07/11 16:48:50 god
	* proc info support
	*
	* I accept terms and conditions stated in the Legal Agreement
	* (available at http://www.namesys.com/legalese.html)
	*
	*/

	/*
	* Make Linus happy.
	* Local variables:
	* c-indentation-style: "K&R"
	* mode-name: "LC"
	* c-basic-offset: 8
	* tab-width: 8
	* End:
	*/