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linux/fs/reiserfs/procfs.c

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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/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/init.h>
#include <linux/proc_fs.h>
#ifdef CONFIG_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_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_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_path.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);
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 const 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 const struct file_operations r_file_operations = {
.open = r_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release,
.owner = THIS_MODULE,
};
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 *))
{
proc_create_data(name, 0, REISERFS_SB(sb)->procdir,
&r_file_operations, func);
}
int reiserfs_proc_info_init(struct super_block *sb)
{
char b[BDEVNAME_SIZE];
char *s;
/* Some block devices use /'s */
strlcpy(b, reiserfs_bdevname(sb), BDEVNAME_SIZE);
s = strchr(b, '/');
if (s)
*s = '!';
spin_lock_init(&__PINFO(sb).lock);
REISERFS_SB(sb)->procdir = proc_mkdir(b, 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, b);
return 1;
}
int reiserfs_proc_info_done(struct super_block *sb)
{
struct proc_dir_entry *de = REISERFS_SB(sb)->procdir;
char b[BDEVNAME_SIZE];
char *s;
/* Some block devices use /'s */
strlcpy(b, reiserfs_bdevname(sb), BDEVNAME_SIZE);
s = strchr(b, '/');
if (s)
*s = '!';
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(b, 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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