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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 found\n" );
drop_super( result );
result = NULL;
}
} else
printk( KERN_DEBUG "reiserfs: procfs-74: "
"race between procinfo and umount\n" );
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 format\twith checks %s\n",
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%s\n"
"mount options: \t%s%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"
"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 " : "",
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 ],
"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 ) {
if( len > PAGE_SIZE - 240 ) {
len += sprintf( &buffer[ len ], "... and more\n" );
break;
}
len += sprintf( &buffer[ len ],
"%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 )
);
}
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: %lu\n"
"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%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"
"state: \t%i\n"
"magic: \t%12.12s\n"
"hash: \t%s\n"
"tree_height: \t%i\n"
"bmap_nr: \t%i\n"
"version: \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_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 more\n" );
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%i\n"
"s_journal_dev: \t%s[%x]\n"
"s_orig_journal_size: \t%i\n"
"s_journal_trans_max: \t%i\n"
"s_journal_block_count: \t%i\n"
"s_journal_max_batch: \t%i\n"
"s_journal_max_commit_age: \t%i\n"
"s_journal_max_trans_age: \t%i\n"
/* incore fields */
"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_journal_list_index: \t%i\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",
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/%s\n",
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/%s\n",
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:
*/
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