fs/reiserfs/procfs.c - third_party/linux - Git at Google


            
            /* -*- 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/config.h>

            
            #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/smp_lock.h>

            
            #include <linux/init.h>

            
            #include <linux/proc_fs.h>


            #if defined( 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_kmallocs: \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_kmallocs ),

            
            			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_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);


            	if (de->deleted) {

            
            		deactivate_super(s);

            
            		return NULL;

            
            	}


            	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 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 struct file_operations r_file_operations = {

            
            	.open		= r_open,

            
            	.read		= seq_read,

            
            	.llseek		= seq_lseek,

            
            	.release	= seq_release,

            
            };


            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 *))

            
            {

            
            	struct proc_dir_entry *de;

            
            	de = create_proc_entry(name, 0, REISERFS_SB(sb)->procdir);

            
            	if (de) {

            
            		de->data = func;

            
            		de->proc_fops = &r_file_operations;

            
            	}

            
            }


            int reiserfs_proc_info_init( struct super_block *sb )

            
            {

            
            	spin_lock_init( & __PINFO( sb ).lock );

            
            	REISERFS_SB(sb)->procdir = proc_mkdir(reiserfs_bdevname (sb), 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, reiserfs_bdevname (sb) );

            
            	return 1;

            
            }


            int reiserfs_proc_info_done( struct super_block *sb )

            
            {

            
            	struct proc_dir_entry *de = REISERFS_SB(sb)->procdir;

            
            	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( reiserfs_bdevname (sb), 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/config.h>
	#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/smp_lock.h>
	#include <linux/init.h>
	#include <linux/proc_fs.h>

	#if defined( 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_kmallocs: \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_kmallocs ),
	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_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);

	if (de->deleted) {
	deactivate_super(s);
	return NULL;
	}

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

	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 *))
	{
	struct proc_dir_entry *de;
	de = create_proc_entry(name, 0, REISERFS_SB(sb)->procdir);
	if (de) {
	de->data = func;
	de->proc_fops = &r_file_operations;
	}
	}

	int reiserfs_proc_info_init( struct super_block *sb )
	{
	spin_lock_init( & __PINFO( sb ).lock );
	REISERFS_SB(sb)->procdir = proc_mkdir(reiserfs_bdevname (sb), 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, reiserfs_bdevname (sb) );
	return 1;
	}

	int reiserfs_proc_info_done( struct super_block *sb )
	{
	struct proc_dir_entry *de = REISERFS_SB(sb)->procdir;
	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( reiserfs_bdevname (sb), 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:
	*/