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linux/fs/reiserfs/procfs.c
Linus Torvalds 1da177e4c3 Linux-2.6.12-rc2 
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00

665 lines
16 KiB
C
Raw Blame History

/* -*- 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) ? \
(__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 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:
*/
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