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f2fs: add proc entry to monitor current usage of segments

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You can monitor valid block counts of whole segments in:
  /proc/fs/f2fs/sdb1/segment_info.

Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
This commit is contained in:
Jaegeuk Kim 2013-06-28 12:47:01 +09:00
parent d51a7fba25
commit 5e176d54a6
2 changed files with 47 additions and 0 deletions
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1
fs/f2fs/f2fs.h
View file

@ -350,6 +350,7 @@ enum page_type {
struct f2fs_sb_info {
struct super_block *sb; /* pointer to VFS super block */
struct proc_dir_entry *s_proc; /* proc entry */
struct buffer_head *raw_super_buf; /* buffer head of raw sb */
struct f2fs_super_block *raw_super; /* raw super block pointer */
int s_dirty; /* dirty flag for checkpoint */

46
fs/f2fs/super.c
View file

@ -18,6 +18,7 @@
#include <linux/parser.h>
#include <linux/mount.h>
#include <linux/seq_file.h>
#include <linux/proc_fs.h>
#include <linux/random.h>
#include <linux/exportfs.h>
#include <linux/blkdev.h>
@ -31,6 +32,7 @@
#define CREATE_TRACE_POINTS
#include <trace/events/f2fs.h>
static struct proc_dir_entry *f2fs_proc_root;
static struct kmem_cache *f2fs_inode_cachep;
enum {
@ -223,6 +225,11 @@ static void f2fs_put_super(struct super_block *sb)
{
struct f2fs_sb_info *sbi = F2FS_SB(sb);
if (sbi->s_proc) {
remove_proc_entry("segment_info", sbi->s_proc);
remove_proc_entry(sb->s_id, f2fs_proc_root);
}
f2fs_destroy_stats(sbi);
stop_gc_thread(sbi);
@ -340,6 +347,36 @@ static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
return 0;
}
static int segment_info_seq_show(struct seq_file *seq, void *offset)
{
struct super_block *sb = seq->private;
struct f2fs_sb_info *sbi = F2FS_SB(sb);
unsigned int total_segs = le32_to_cpu(sbi->raw_super->segment_count_main);
int i;
for (i = 0; i < total_segs; i++) {
seq_printf(seq, "%u", get_valid_blocks(sbi, i, 1));
if (i != 0 && (i % 10) == 0)
seq_puts(seq, "\n");
else
seq_puts(seq, " ");
}
return 0;
}
static int segment_info_open_fs(struct inode *inode, struct file *file)
{
return single_open(file, segment_info_seq_show, PDE_DATA(inode));
}
static const struct file_operations f2fs_seq_segment_info_fops = {
.owner = THIS_MODULE,
.open = segment_info_open_fs,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static int f2fs_remount(struct super_block *sb, int *flags, char *data)
{
struct f2fs_sb_info *sbi = F2FS_SB(sb);
@ -766,6 +803,13 @@ static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
if (err)
goto fail;
if (f2fs_proc_root)
sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root);
if (sbi->s_proc)
proc_create_data("segment_info", S_IRUGO, sbi->s_proc,
&f2fs_seq_segment_info_fops, sb);
if (test_opt(sbi, DISCARD)) {
struct request_queue *q = bdev_get_queue(sb->s_bdev);
if (!blk_queue_discard(q))
@ -852,12 +896,14 @@ static int __init init_f2fs_fs(void)
if (err)
goto fail;
f2fs_create_root_stats();
f2fs_proc_root = proc_mkdir("fs/f2fs", NULL);
fail:
return err;
}
static void __exit exit_f2fs_fs(void)
{
remove_proc_entry("fs/f2fs", NULL);
f2fs_destroy_root_stats();
unregister_filesystem(&f2fs_fs_type);
destroy_checkpoint_caches();