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me2fs_sysfs.c
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/********************************************************************************
File : me2fs_sysfs.c
Description : sysfs operations for my ext2 file system
*********************************************************************************/
#include <linux/completion.h>
#include "me2fs.h"
#include "me2fs_util.h"
/*
==================================================================================
Prototype Statement
==================================================================================
*/
static void releaseKobj( struct kobject *kobj );
/*
----------------------------------------------------------------------------------
Attribute methods of me2fs Superblock information
----------------------------------------------------------------------------------
*/
static ssize_t ulShow( struct kobject *kobj, struct attribute *attr, char *buf );
static ssize_t uiShow( struct kobject *kobj, struct attribute *attr, char *buf );
static ssize_t usShow( struct kobject *kobj, struct attribute *attr, char *buf );
static ssize_t uxShow( struct kobject *kobj, struct attribute *attr, char *buf );
/*
----------------------------------------------------------------------------------
Attribute methods of me2fs Superblock information
----------------------------------------------------------------------------------
*/
static ssize_t le32Show( struct kobject *kobj,
struct attribute *attr, char *buf );
static ssize_t le16Show( struct kobject *kobj,
struct attribute *attr, char *buf );
static ssize_t le32XShow( struct kobject *kobj,
struct attribute *attr, char *buf );
static ssize_t stringShow( struct kobject *kobj,
struct attribute *attr, char *buf );
static ssize_t uuidShow( struct kobject *kobj,
struct attribute *attr, char *buf );
/*
==================================================================================
DEFINES
==================================================================================
*/
struct me2fs_attr
{
struct attribute attr;
ssize_t ( *show )( struct kobject *kobj, struct attribute *attr, char *buf );
ssize_t ( *store )( struct kobject *kobj,
struct attribute *attr,
const char *buf );
int offset;
};
#define ATTR_LIST( name ) &me2fs_attr_##name.attr
/*
----------------------------------------------------------------------------------
Attribute of me2fs Superblock information
----------------------------------------------------------------------------------
*/
#define ME2FS_ATTR_OFFSET( _name, _mode, _show, _store, _elname ) \
static struct me2fs_attr me2fs_attr_##_name = { \
.attr = { .name = __stringify( _name ), .mode = _mode }, \
.show = _show, \
.store = _store, \
.offset = offsetof( struct me2fs_sb_info, _elname ), \
}
#define ME2FS_MI_UL_ATTR( name ) \
ME2FS_ATTR_OFFSET( name, 0444, ulShow, NULL, s_##name )
#define ME2FS_MI_UI_ATTR( name ) \
ME2FS_ATTR_OFFSET( name, 0444, uiShow, NULL, s_##name )
#define ME2FS_MI_US_ATTR( name ) \
ME2FS_ATTR_OFFSET( name, 0444, usShow, NULL, s_##name )
#define ME2FS_MI_UX_ATTR( name ) \
ME2FS_ATTR_OFFSET( name, 0444, uxShow, NULL, s_##name )
/*
----------------------------------------------------------------------------------
Attribute of ext2 superblock
----------------------------------------------------------------------------------
*/
#define EXT2_ATTR_OFFSET( _name, _mode, _show, _store, _elname ) \
static struct me2fs_attr me2fs_attr_##_name = { \
.attr = { .name = __stringify( _name ), .mode = _mode }, \
.show = _show, \
.store = _store, \
.offset = offsetof( struct ext2_super_block, _elname ), \
}
#define ME2FS_ES_LE32_ATTR( name ) \
EXT2_ATTR_OFFSET( name, 0444, le32Show, NULL, s_##name )
#define ME2FS_ES_LE16_ATTR( name ) \
EXT2_ATTR_OFFSET( name, 0444, le16Show, NULL, s_##name )
#define ME2FS_ES_LE32X_ATTR( name ) \
EXT2_ATTR_OFFSET( name, 0444, le32XShow, NULL, s_##name )
#define ME2FS_ES_STRING_ATTR( name ) \
EXT2_ATTR_OFFSET( name, 0444, stringShow, NULL, s_##name )
#define ME2FS_ES_UUID_ATTR( name ) \
EXT2_ATTR_OFFSET( name, 0444, uuidShow, NULL, s_##name )
/*
==================================================================================
Management
==================================================================================
*/
struct kset *me2fs_kset;
/* me2fs superblock information */
ME2FS_MI_UL_ATTR( sb_block );
ME2FS_MI_UX_ATTR( mount_opt );
ME2FS_MI_US_ATTR( mount_state );
ME2FS_MI_US_ATTR( inode_size );
ME2FS_MI_UI_ATTR( first_ino );
ME2FS_MI_UL_ATTR( inodes_per_group );
ME2FS_MI_UL_ATTR( inodes_per_block );
ME2FS_MI_UL_ATTR( itb_per_group );
ME2FS_MI_UL_ATTR( groups_count );
ME2FS_MI_UL_ATTR( blocks_per_group );
ME2FS_MI_UL_ATTR( desc_per_block );
ME2FS_MI_UL_ATTR( gdb_count );
ME2FS_MI_UL_ATTR( frag_size );
ME2FS_MI_UL_ATTR( frags_per_block );
ME2FS_MI_UL_ATTR( frags_per_group );
ME2FS_MI_UI_ATTR( resuid );
ME2FS_MI_UI_ATTR( resgid );
/* ext2 superblock */
ME2FS_ES_LE32_ATTR( inodes_count );
ME2FS_ES_LE32_ATTR( blocks_count );
ME2FS_ES_LE32_ATTR( r_blocks_count );
ME2FS_ES_LE32_ATTR( free_blocks_count );
ME2FS_ES_LE32_ATTR( free_inodes_count );
ME2FS_ES_LE32_ATTR( first_data_block );
ME2FS_ES_LE32_ATTR( log_block_size );
ME2FS_ES_LE32_ATTR( log_frag_size );
ME2FS_ES_LE32_ATTR( mtime );
ME2FS_ES_LE32_ATTR( wtime );
ME2FS_ES_LE16_ATTR( mnt_count );
ME2FS_ES_LE16_ATTR( max_mnt_count );
ME2FS_ES_LE16_ATTR( state );
ME2FS_ES_LE16_ATTR( errors );
ME2FS_ES_LE16_ATTR( minor_rev_level );
ME2FS_ES_LE32_ATTR( lastcheck );
ME2FS_ES_LE32_ATTR( checkinterval );
ME2FS_ES_LE32_ATTR( creator_os );
ME2FS_ES_LE16_ATTR( rev_level );
ME2FS_ES_LE16_ATTR( def_resuid );
ME2FS_ES_LE16_ATTR( def_resgid );
ME2FS_ES_LE32X_ATTR( feature_compat );
ME2FS_ES_LE32X_ATTR( feature_incompat );
ME2FS_ES_LE32X_ATTR( feature_ro_compat );
ME2FS_ES_UUID_ATTR( uuid );
ME2FS_ES_STRING_ATTR( volume_name );
ME2FS_ES_STRING_ATTR( last_mounted );
ME2FS_ES_LE32X_ATTR( algorithm_usage_bitmap );
ME2FS_ES_LE32_ATTR( prealloc_blocks );
ME2FS_ES_LE32_ATTR( prealloc_dir_blocks );
static struct attribute *me2fs_attrs[ ] =
{
/* me2fs superblock information */
ATTR_LIST( sb_block ),
ATTR_LIST( mount_opt ),
ATTR_LIST( mount_state ),
ATTR_LIST( inode_size ),
ATTR_LIST( first_ino ),
ATTR_LIST( inodes_per_group ),
ATTR_LIST( inodes_per_block ),
ATTR_LIST( itb_per_group ),
ATTR_LIST( groups_count ),
ATTR_LIST( blocks_per_group ),
ATTR_LIST( desc_per_block ),
ATTR_LIST( gdb_count ),
ATTR_LIST( frag_size ),
ATTR_LIST( frags_per_block ),
ATTR_LIST( frags_per_group ),
ATTR_LIST( resuid ),
ATTR_LIST( resgid ),
/* ext2 superblock */
ATTR_LIST( inodes_count ),
ATTR_LIST( blocks_count ),
ATTR_LIST( r_blocks_count ),
ATTR_LIST( free_blocks_count ),
ATTR_LIST( free_inodes_count ),
ATTR_LIST( first_data_block ),
ATTR_LIST( log_block_size ),
ATTR_LIST( log_frag_size ),
ATTR_LIST( mtime ),
ATTR_LIST( wtime ),
ATTR_LIST( mnt_count ),
ATTR_LIST( max_mnt_count ),
ATTR_LIST( state ),
ATTR_LIST( errors ),
ATTR_LIST( minor_rev_level ),
ATTR_LIST( lastcheck ),
ATTR_LIST( checkinterval ),
ATTR_LIST( creator_os ),
ATTR_LIST( rev_level ),
ATTR_LIST( def_resuid ),
ATTR_LIST( def_resgid ),
ATTR_LIST( feature_compat ),
ATTR_LIST( feature_incompat ),
ATTR_LIST( feature_ro_compat ),
ATTR_LIST( uuid ),
ATTR_LIST( volume_name ),
ATTR_LIST( last_mounted ),
ATTR_LIST( algorithm_usage_bitmap ),
ATTR_LIST( prealloc_blocks ),
ATTR_LIST( prealloc_dir_blocks ),
NULL,
};
static struct kobj_type me2fs_ktype =
{
.default_attrs = me2fs_attrs,
.sysfs_ops = &kobj_sysfs_ops,
.release = releaseKobj,
};
/*
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
< Open Functions >
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
*/
/*
_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/
Function :me2fsInitKset
Input :void
Output :void
Return :int
< result >
Description :initialize me2fs kset
_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/
*/
int me2fsInitKset( void )
{
me2fs_kset = kset_create_and_add( "me2fs", NULL, fs_kobj );
if( !me2fs_kset )
{
return( -ENOMEM );
}
return( 0 );
}
/*
_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/
Function :me2fsKobjInitAndAdd
Input :struct super_block *sb
< vfs superblock >
struct me2fs_sb_info *msi
< superblock inromation >
Output :void
Return :int
< result >
Description :initialize me2fs kobject and add it to sysfs
_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/
*/
int me2fsKobjInitAndAdd( struct super_block *sb,
struct me2fs_sb_info *msi )
{
int error;
msi->s_kobj.kset = me2fs_kset;
error = kobject_init_and_add( &msi->s_kobj,
&me2fs_ktype, &me2fs_kset->kobj, "%s", sb->s_id );
if( !error )
{
init_completion( &msi->s_kobj_unregister );
}
return( error );
}
/*
_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/
Function :me2fsKobjDel
Input :struct me2fs_sb_info *msi
< me2fs superblock information >
Output :void
Return :void
Description :delete kobject
_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/
*/
void me2fsKobjDel( struct me2fs_sb_info *msi )
{
kobject_del( &msi->s_kobj );
}
/*
_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/
Function :me2fsKobjPut
Input :struct me2fs_sb_info *msi
< me2fs superblock information >
Output :void
Return :void
Description :put kobject
_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/
*/
void me2fsKobjPut( struct me2fs_sb_info *msi )
{
kobject_put( &msi->s_kobj );
}
/*
_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/
Function :me2fsKobjRemove
Input :struct me2fs_sb_info *msi
< me2fs superblock information >
Output :void
Return :void
Description :remove kobject and wait
_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/
*/
void me2fsKobjRemove( struct me2fs_sb_info *msi )
{
me2fsKobjDel( msi );
me2fsKobjPut( msi );
wait_for_completion( &msi->s_kobj_unregister );
}
/*
_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/
Function :me2fsUnregisterKset
Input :void
Output :void
Return :void
Description :unregister kset from sysfs
_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/
*/
void me2fsUnregisterKset( void )
{
DBGPRINT( "<ME2FS>kset unregister\n" );
kset_unregister( me2fs_kset );
}
/*
_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/
Function :void
Input :void
Output :void
Return :void
Description :void
_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/
*/
/*
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
< Local Functions >
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
*/
/*
==================================================================================
Function :releaseKobj
Input :struct kobject *kobj
< general object >
Output :void
Return :void
Description :release kobject
==================================================================================
*/
static void releaseKobj( struct kobject *kobj )
{
struct me2fs_sb_info *msi;
msi = container_of( kobj, struct me2fs_sb_info, s_kobj );
complete( &msi->s_kobj_unregister );
}
/*
----------------------------------------------------------------------------------
Attribute methods of me2fs Superblock information
----------------------------------------------------------------------------------
*/
/*
==================================================================================
Function :ulShow
Input :struct kobject *kobj
< general object >
struct attribute *attr
< general attribute >
char *buf
< buffer to output >
Output :void
Return :ssize_t
< actual output size >
Description :show method for unsigned long
==================================================================================
*/
static ssize_t ulShow( struct kobject *kobj, struct attribute *attr, char *buf )
{
struct me2fs_sb_info *mi;
struct me2fs_attr *me_attr;
unsigned long *ul;
mi = container_of( kobj, struct me2fs_sb_info, s_kobj );
me_attr = container_of( attr, struct me2fs_attr, attr );
ul = ( unsigned long* )( ( ( char* )mi ) + me_attr->offset );
return( scnprintf( buf, PAGE_SIZE, "%lu\n", *ul ) );
}
/*
==================================================================================
Function :uiShow
Input :struct kobject *kobj
< general object >
struct attribute *attr
< general attribute >
char *buf
< buffer to output >
Output :void
Return :ssize_t
< actual output size >
Description :show method for unsigned int
==================================================================================
*/
static ssize_t uiShow( struct kobject *kobj, struct attribute *attr, char *buf )
{
struct me2fs_sb_info *mi;
struct me2fs_attr *me_attr;
unsigned int *ui;
mi = container_of( kobj, struct me2fs_sb_info, s_kobj );
me_attr = container_of( attr, struct me2fs_attr, attr );
ui = ( unsigned int* )( ( ( char* )mi ) + me_attr->offset );
return( scnprintf( buf, PAGE_SIZE, "%u\n", *ui ) );
}
/*
==================================================================================
Function :usShow
Input :struct kobject *kobj
< general object >
struct attribute *attr
< general attribute >
char *buf
< buffer to output >
Output :void
Return :ssize_t
< actual output size >
Description :show method for unsigned short
==================================================================================
*/
static ssize_t usShow( struct kobject *kobj, struct attribute *attr, char *buf )
{
struct me2fs_sb_info *mi;
struct me2fs_attr *me_attr;
unsigned short *us;
mi = container_of( kobj, struct me2fs_sb_info, s_kobj );
me_attr = container_of( attr, struct me2fs_attr, attr );
us = ( unsigned short* )( ( ( char* )mi ) + me_attr->offset );
return( scnprintf( buf, PAGE_SIZE, "%u\n", *us ) );
}
/*
==================================================================================
Function :uxShow
Input :struct kobject *kobj
< general object >
struct attribute *attr
< general attribute >
char *buf
< buffer to output >
Output :void
Return :ssize_t
< actual output size >
Description :show method for hexadecimal of unsigned int
==================================================================================
*/
static ssize_t uxShow( struct kobject *kobj, struct attribute *attr, char *buf )
{
struct me2fs_sb_info *mi;
struct me2fs_attr *me_attr;
unsigned int *ui;
mi = container_of( kobj, struct me2fs_sb_info, s_kobj );
me_attr = container_of( attr, struct me2fs_attr, attr );
ui = ( unsigned int* )( ( ( char* )mi ) + me_attr->offset );
return( scnprintf( buf, PAGE_SIZE, "%08X\n", *ui ) );
}
/*
----------------------------------------------------------------------------------
Attribute methods of me2fs Superblock information
----------------------------------------------------------------------------------
*/
/*
==================================================================================
Function :le32Show
Input :struct kobject *kobj
< general object >
struct attribute *attr
< general attribute >
char *buf
< buffer to output >
Output :void
Return :ssize_t
< actual output size >
Description :show method for __le32
==================================================================================
*/
static ssize_t le32Show( struct kobject *kobj, struct attribute *attr, char *buf )
{
struct me2fs_sb_info *mi;
struct me2fs_attr *me_attr;
__le32 *es_le32;
mi = container_of( kobj, struct me2fs_sb_info, s_kobj );
me_attr = container_of( attr, struct me2fs_attr, attr );
es_le32 = ( unsigned int* )( ( ( char* )mi->s_esb ) + me_attr->offset );
return( scnprintf( buf, PAGE_SIZE, "%u\n", le32_to_cpu( *es_le32 ) ) );
}
/*
==================================================================================
Function :le16Show
Input :struct kobject *kobj
< general object >
struct attribute *attr
< general attribute >
char *buf
< buffer to output >
Output :void
Return :ssize_t
< actual output size >
Description :show method for __le16
==================================================================================
*/
static ssize_t le16Show( struct kobject *kobj, struct attribute *attr, char *buf )
{
struct me2fs_sb_info *mi;
struct me2fs_attr *me_attr;
__le16 *es_le16;
mi = container_of( kobj, struct me2fs_sb_info, s_kobj );
me_attr = container_of( attr, struct me2fs_attr, attr );
es_le16 = ( __le16* )( ( ( char* )mi->s_esb ) + me_attr->offset );
return( scnprintf( buf, PAGE_SIZE, "%u\n", le16_to_cpu( *es_le16 ) ) );
}
/*
==================================================================================
Function :le32XShow
Input :struct kobject *kobj
< general object >
struct attribute *attr
< general attribute >
char *buf
< buffer to output >
Output :void
Return :ssize_t
< actual output size >
Description :show method for hexadecimal format of __le32
==================================================================================
*/
static ssize_t le32XShow( struct kobject *kobj, struct attribute *attr, char *buf )
{
struct me2fs_sb_info *mi;
struct me2fs_attr *me_attr;
__le32 *es_le32;
mi = container_of( kobj, struct me2fs_sb_info, s_kobj );
me_attr = container_of( attr, struct me2fs_attr, attr );
es_le32 = ( __le32* )( ( ( char* )mi->s_esb ) + me_attr->offset );
return( scnprintf( buf, PAGE_SIZE, "%08X\n", le32_to_cpu( *es_le32 ) ) );
}
/*
==================================================================================
Function :stringShow
Input :struct kobject *kobj
< general object >
struct attribute *attr
< general attribute >
char *buf
< buffer to output >
Output :void
Return :ssize_t
< actual output size >
Description :show method for string
==================================================================================
*/
static ssize_t stringShow( struct kobject *kobj, struct attribute *attr, char *buf )
{
struct me2fs_sb_info *mi;
struct me2fs_attr *me_attr;
char *string;
ssize_t size;
mi = container_of( kobj, struct me2fs_sb_info, s_kobj );
me_attr = container_of( attr, struct me2fs_attr, attr );
string = ( ( char* )mi->s_esb ) + me_attr->offset;
size = scnprintf( buf, PAGE_SIZE - 1, "%s\n", string );
buf[ size++ ] = '\n';
return( size );
}
/*
==================================================================================
Function :uuidShow
Input :struct kobject *kobj
< general object >
struct attribute *attr
< general attribute >
char *buf
< buffer to output >
Output :void
Return :ssize_t
< actual output size >
Description :show method for uuid
==================================================================================
*/
static ssize_t uuidShow( struct kobject *kobj, struct attribute *attr, char *buf )
{
struct me2fs_sb_info *mi;
struct me2fs_attr *me_attr;
char *uuid;
int i;
ssize_t size = 0;
mi = container_of( kobj, struct me2fs_sb_info, s_kobj );
me_attr = container_of( attr, struct me2fs_attr, attr );
uuid = ( ( char* )mi->s_esb ) + me_attr->offset;
for( i = 0 ; i < 16 ; i++ )
{
size += scnprintf( buf + ( i * 2 ),
PAGE_SIZE - ( i * 2 ) - 1, "%02X", uuid[ i ] );
}
buf[ size++ ] = '\n';
return( size );
}
/*
==================================================================================
Function :void
Input :void
Output :void
Return :void
Description :void
==================================================================================
*/