procfs.c

来自「Linux Kernel 2.6.9 for OMAP1710」· C语言 代码 · 共 665 行 · 第 1/2 页

#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_MAX_COMMIT_AGE(sb),
                        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:
 */