procfs.c
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上传日期:2013-02-24
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- /* -*- 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/sched.h>
- #include <asm/uaccess.h>
- #include <linux/reiserfs_fs.h>
- #include <linux/reiserfs_fs_sb.h>
- #include <linux/smp_lock.h>
- #include <linux/locks.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 struct super_block *procinfo_prologue( kdev_t dev )
- {
- struct super_block *result;
- /* get super-block by device */
- result = get_super( dev );
- if( result != NULL ) {
- if( !reiserfs_is_super( result ) ) {
- printk( KERN_DEBUG "reiserfs: procfs-52: "
- "non-reiserfs super foundn" );
- drop_super( result );
- result = NULL;
- }
- } else
- printk( KERN_DEBUG "reiserfs: procfs-74: "
- "race between procinfo and umountn" );
- return result;
- }
- int procinfo_epilogue( struct super_block *super )
- {
- drop_super( super );
- return 0;
- }
- int reiserfs_proc_tail( int len, char *buffer, char **start,
- off_t offset, int count, int *eof )
- {
- /* this is black procfs magic */
- if( offset >= len ) {
- *start = buffer;
- *eof = 1;
- return 0;
- }
- *start = buffer + offset;
- if( ( len -= offset ) > count ) {
- return count;
- }
- *eof = 1;
- return len;
- }
- int reiserfs_version_in_proc( char *buffer, char **start, off_t offset,
- int count, int *eof, void *data )
- {
- int len = 0;
- struct super_block *sb;
- char *format;
-
- sb = procinfo_prologue( ( kdev_t ) ( long ) data );
- if( sb == NULL )
- return -ENOENT;
- if ( sb->u.reiserfs_sb.s_properties & (1 << REISERFS_3_6) ) {
- format = "3.6";
- } else if ( sb->u.reiserfs_sb.s_properties & (1 << REISERFS_3_5) ) {
- format = "3.5";
- } else {
- format = "unknown";
- }
- len += sprintf( &buffer[ len ], "%s formattwith checks %sn",
- format,
- #if defined( CONFIG_REISERFS_CHECK )
- "on"
- #else
- "off"
- #endif
- );
- procinfo_epilogue( sb );
- return reiserfs_proc_tail( len, buffer, start, offset, count, eof );
- }
- int reiserfs_global_version_in_proc( char *buffer, char **start, off_t offset,
- int count, int *eof, void *data )
- {
- int len = 0;
-
- len += sprintf( &buffer[ len ], "%s [%s]n",
- reiserfs_get_version_string(),
- #if defined( CONFIG_REISERFS_FS_MODULE )
- "as module"
- #else
- "built into kernel"
- #endif
- );
- return reiserfs_proc_tail( len, buffer, start, offset, count, eof );
- }
- #define SF( x ) ( r -> x )
- #define SFP( x ) SF( s_proc_info_data.x )
- #define SFPL( x ) SFP( x[ level ] )
- #define SFPF( x ) SFP( find_forward.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 -> x )
- #define DFL( x ) D4C( rs -> x )
- #define objectid_map( s, rs ) (old_format_only (s) ?
- (__u32 *)((struct reiserfs_super_block_v1 *)rs + 1) :
- (__u32 *)(rs + 1))
- #define MAP( i ) D4C( objectid_map( sb, rs )[ i ] )
- #define DJF( x ) le32_to_cpu( rs -> x )
- #define JF( x ) ( r -> s_journal -> x )
- int reiserfs_super_in_proc( char *buffer, char **start, off_t offset,
- int count, int *eof, void *data )
- {
- struct super_block *sb;
- struct reiserfs_sb_info *r;
- int len = 0;
-
- sb = procinfo_prologue( ( kdev_t ) ( long ) data );
- if( sb == NULL )
- return -ENOENT;
- r = &sb->u.reiserfs_sb;
- len += sprintf( &buffer[ len ],
- "state: t%sn"
- "mount options: t%s%s%s%s%s%s%s%s%s%s%s%sn"
- "gen. counter: t%in"
- "s_kmallocs: t%in"
- "s_disk_reads: t%in"
- "s_disk_writes: t%in"
- "s_fix_nodes: t%in"
- "s_do_balance: t%in"
- "s_unneeded_left_neighbor: t%in"
- "s_good_search_by_key_reada: t%in"
- "s_bmaps: t%in"
- "s_bmaps_without_search: t%in"
- "s_direct2indirect: t%in"
- "s_indirect2direct: t%in"
- "n"
- "max_hash_collisions: t%in"
- "breads: t%lun"
- "bread_misses: t%lun"
- "search_by_key: t%lun"
- "search_by_key_fs_changed: t%lun"
- "search_by_key_restarted: t%lun"
-
- "leaked_oid: t%lun"
- "leaves_removable: t%lun",
- 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 " : "",
- dont_have_tails( sb ) ? "NO_TAILS " : "TAILS ",
- replay_only( sb ) ? "REPLAY_ONLY " : "",
- reiserfs_dont_log( sb ) ? "DONT_LOG " : "LOG ",
- 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( leaked_oid ),
- SFP( leaves_removable ) );
- procinfo_epilogue( sb );
- return reiserfs_proc_tail( len, buffer, start, offset, count, eof );
- }
- int reiserfs_per_level_in_proc( char *buffer, char **start, off_t offset,
- int count, int *eof, void *data )
- {
- struct super_block *sb;
- struct reiserfs_sb_info *r;
- int len = 0;
- int level;
-
- sb = procinfo_prologue( ( kdev_t ) ( long ) data );
- if( sb == NULL )
- return -ENOENT;
- r = &sb->u.reiserfs_sb;
- len += sprintf( &buffer[ len ],
- "levelt"
- " 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 ) {
- if( len > PAGE_SIZE - 240 ) {
- len += sprintf( &buffer[ len ], "... and moren" );
- break;
- }
- len += sprintf( &buffer[ len ],
- "%it"
- " %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 )
- );
- }
- procinfo_epilogue( sb );
- return reiserfs_proc_tail( len, buffer, start, offset, count, eof );
- }
- int reiserfs_bitmap_in_proc( char *buffer, char **start, off_t offset,
- int count, int *eof, void *data )
- {
- struct super_block *sb;
- struct reiserfs_sb_info *r = &sb->u.reiserfs_sb;
- int len = 0;
-
- sb = procinfo_prologue( ( kdev_t ) ( long ) data );
- if( sb == NULL )
- return -ENOENT;
- r = &sb->u.reiserfs_sb;
- len += sprintf( &buffer[ len ], "free_block: %lun"
- "find_forward:"
- " wait"
- " bmap"
- " retry"
- " journal_hint"
- " journal_out"
- "n"
- " %12lu"
- " %12lu"
- " %12lu"
- " %12lu"
- " %12lu"
- " %12lu"
- "n",
- SFP( free_block ),
- SFPF( call ),
- SFPF( wait ),
- SFPF( bmap ),
- SFPF( retry ),
- SFPF( in_journal_hint ),
- SFPF( in_journal_out ) );
- procinfo_epilogue( sb );
- return reiserfs_proc_tail( len, buffer, start, offset, count, eof );
- }
- int reiserfs_on_disk_super_in_proc( char *buffer, char **start, off_t offset,
- int count, int *eof, void *data )
- {
- struct super_block *sb;
- struct reiserfs_sb_info *sb_info;
- struct reiserfs_super_block *rs;
- int hash_code;
- int len = 0;
-
- sb = procinfo_prologue( ( kdev_t ) ( long ) data );
- if( sb == NULL )
- return -ENOENT;
- sb_info = &sb->u.reiserfs_sb;
- rs = sb_info -> s_rs;
- hash_code = DFL( s_hash_function_code );
- len += sprintf( &buffer[ len ],
- "block_count: t%in"
- "free_blocks: t%in"
- "root_block: t%in"
- "blocksize: t%in"
- "oid_maxsize: t%in"
- "oid_cursize: t%in"
- "state: t%in"
- "magic: t%12.12sn"
- "hash: t%sn"
- "tree_height: t%in"
- "bmap_nr: t%in"
- "version: t%in",
- 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_state ),
- rs -> s_magic,
- 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 ) );
- procinfo_epilogue( sb );
- return reiserfs_proc_tail( len, buffer, start, offset, count, eof );
- }
- int reiserfs_oidmap_in_proc( char *buffer, char **start, off_t offset,
- int count, int *eof, void *data )
- {
- struct super_block *sb;
- struct reiserfs_sb_info *sb_info;
- struct reiserfs_super_block *rs;
- int i;
- unsigned int mapsize;
- unsigned long total_used;
- int len = 0;
- int exact;
-
- sb = procinfo_prologue( ( kdev_t ) ( long ) data );
- if( sb == NULL )
- return -ENOENT;
- sb_info = &sb->u.reiserfs_sb;
- rs = sb_info -> s_rs;
- mapsize = le16_to_cpu( rs -> s_oid_cursize );
- total_used = 0;
- for( i = 0 ; i < mapsize ; ++i ) {
- __u32 right;
- right = ( i == mapsize - 1 ) ? MAX_KEY_OBJECTID : MAP( i + 1 );
- len += sprintf( &buffer[ len ], "%s: [ %x .. %x )n",
- ( i & 1 ) ? "free" : "used", MAP( i ), right );
- if( ! ( i & 1 ) ) {
- total_used += right - MAP( i );
- }
- if( len > PAGE_SIZE - 100 ) {
- len += sprintf( &buffer[ len ], "... and moren" );
- break;
- }
- }
- #if defined( REISERFS_USE_OIDMAPF )
- if( sb_info -> oidmap.use_file && ( sb_info -> oidmap.mapf != NULL ) ) {
- loff_t size;
- size = sb_info -> oidmap.mapf -> f_dentry -> d_inode -> i_size;
- total_used += size / sizeof( reiserfs_oidinterval_d_t );
- exact = 1;
- } else
- #endif
- {
- exact = ( i == mapsize );
- }
- len += sprintf( &buffer[ len ], "total: t%i [%i/%i] used: %lu [%s]n",
- i,
- mapsize, le16_to_cpu( rs -> s_oid_maxsize ),
- total_used, exact ? "exact" : "estimation" );
- procinfo_epilogue( sb );
- return reiserfs_proc_tail( len, buffer, start, offset, count, eof );
- }
- int reiserfs_journal_in_proc( char *buffer, char **start, off_t offset,
- int count, int *eof, void *data )
- {
- struct super_block *sb;
- struct reiserfs_sb_info *r;
- struct reiserfs_super_block *rs;
- int len = 0;
-
- sb = procinfo_prologue( ( kdev_t ) ( long ) data );
- if( sb == NULL )
- return -ENOENT;
- r = &sb->u.reiserfs_sb;
- rs = r -> s_rs;
- len += sprintf( &buffer[ len ],
- /* on-disk fields */
- "s_journal_block: t%in"
- "s_journal_dev: t%s[%x]n"
- "s_orig_journal_size: t%in"
- "s_journal_trans_max: t%in"
- "s_journal_block_count: t%in"
- "s_journal_max_batch: t%in"
- "s_journal_max_commit_age: t%in"
- "s_journal_max_trans_age: t%in"
- /* incore fields */
- "j_state: t%lin"
- "j_trans_id: t%lun"
- "j_mount_id: t%lun"
- "j_start: t%lun"
- "j_len: t%lun"
- "j_len_alloc: t%lun"
- "j_wcount: t%in"
- "j_bcount: t%lun"
- "j_first_unflushed_offset: t%lun"
- "j_last_flush_trans_id: t%lun"
- "j_trans_start_time: t%lin"
- "j_journal_list_index: t%in"
- "j_list_bitmap_index: t%in"
- "j_must_wait: t%in"
- "j_next_full_flush: t%in"
- "j_next_async_flush: t%in"
- "j_cnode_used: t%in"
- "j_cnode_free: t%in"
- "n"
- /* reiserfs_proc_info_data_t.journal fields */
- "in_journal: t%12lun"
- "in_journal_bitmap: t%12lun"
- "in_journal_reusable: t%12lun"
- "lock_journal: t%12lun"
- "lock_journal_wait: t%12lun"
- "journal_begin: t%12lun"
- "journal_relock_writers: t%12lun"
- "journal_relock_wcount: t%12lun"
- "mark_dirty: t%12lun"
- "mark_dirty_already: t%12lun"
- "mark_dirty_notjournal: t%12lun"
- "restore_prepared: t%12lun"
- "prepare: t%12lun"
- "prepare_retry: t%12lun",
- DJF( s_journal_block ),
- DJF( s_journal_dev ) == 0 ? "none" : bdevname( DJF( s_journal_dev ) ),
- DJF( s_journal_dev ),
- DJF( s_orig_journal_size ),
- DJF( s_journal_trans_max ),
- DJF( s_journal_block_count ),
- DJF( s_journal_max_batch ),
- DJF( s_journal_max_commit_age ),
- DJF( s_journal_max_trans_age ),
-
- 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_journal_list_index ),
- 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 )
- );
- procinfo_epilogue( sb );
- return reiserfs_proc_tail( len, buffer, start, offset, count, eof );
- }
- static struct proc_dir_entry *proc_info_root = NULL;
- static const char *proc_info_root_name = "fs/reiserfs";
- int reiserfs_proc_info_init( struct super_block *sb )
- {
- spin_lock_init( & __PINFO( sb ).lock );
- sb->u.reiserfs_sb.procdir = proc_mkdir( bdevname( sb -> s_dev ),
- proc_info_root );
- if( sb->u.reiserfs_sb.procdir ) {
- sb->u.reiserfs_sb.procdir -> owner = THIS_MODULE;
- return 0;
- }
- reiserfs_warning( "reiserfs: cannot create /proc/%s/%sn",
- proc_info_root_name, bdevname( sb -> s_dev ) );
- return 1;
- }
- int reiserfs_proc_info_done( struct super_block *sb )
- {
- spin_lock( & __PINFO( sb ).lock );
- __PINFO( sb ).exiting = 1;
- spin_unlock( & __PINFO( sb ).lock );
- if ( proc_info_root ) {
- remove_proc_entry( bdevname( sb -> s_dev ), proc_info_root );
- sb->u.reiserfs_sb.procdir = NULL;
- }
- return 0;
- }
- /* Create /proc/fs/reiserfs/DEV/name and attach read procedure @func
- to it. Other parts of reiserfs use this function to make their
- per-device statistics available via /proc */
- struct proc_dir_entry *reiserfs_proc_register( struct super_block *sb,
- char *name, read_proc_t *func )
- {
- return ( sb->u.reiserfs_sb.procdir ) ? create_proc_read_entry
- ( name, 0, sb->u.reiserfs_sb.procdir, func,
- ( void * ) ( long ) sb -> s_dev ) : NULL;
- }
- void reiserfs_proc_unregister( struct super_block *sb, const char *name )
- {
- remove_proc_entry( name, sb->u.reiserfs_sb.procdir );
- }
- 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, 0 );
- if( proc_info_root ) {
- proc_info_root -> owner = THIS_MODULE;
- } else {
- reiserfs_warning( "reiserfs: cannot create /proc/%sn",
- 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, 0 );
- }
- 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( struct super_block *sb,
- char *name,
- read_proc_t *func )
- { return NULL; }
- void reiserfs_proc_unregister( struct super_block *sb, const char *name )
- {;}
- 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; }
- int reiserfs_version_in_proc( char *buffer, char **start, off_t offset,
- int count, int *eof, void *data )
- { return 0; }
- int reiserfs_super_in_proc( char *buffer, char **start, off_t offset,
- int count, int *eof, void *data )
- { return 0; }
- int reiserfs_per_level_in_proc( char *buffer, char **start, off_t offset,
- int count, int *eof, void *data )
- { return 0; }
- int reiserfs_bitmap_in_proc( char *buffer, char **start, off_t offset,
- int count, int *eof, void *data )
- { return 0; }
- int reiserfs_on_disk_super_in_proc( char *buffer, char **start, off_t offset,
- int count, int *eof, void *data )
- { return 0; }
- int reiserfs_oidmap_in_proc( char *buffer, char **start, off_t offset,
- int count, int *eof, void *data )
- { return 0; }
- int reiserfs_journal_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:
- */