diff options
author | Jaegeuk Kim <jaegeuk.kim@samsung.com> | 2013-06-28 03:47:01 (GMT) |
---|---|---|
committer | Jaegeuk Kim <jaegeuk.kim@samsung.com> | 2013-07-30 06:17:02 (GMT) |
commit | 5e176d54a6097f5093cacaaf7baeecbe724d32bd (patch) | |
tree | ea28c893dfd7eef4c766e632fad576b9bcc04bcd /fs | |
parent | d51a7fba254b48aa7090a74d6b1455b6c41bc889 (diff) | |
download | linux-fsl-qoriq-5e176d54a6097f5093cacaaf7baeecbe724d32bd.tar.xz |
f2fs: add proc entry to monitor current usage of segments
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>
Diffstat (limited to 'fs')
-rw-r--r-- | fs/f2fs/f2fs.h | 1 | ||||
-rw-r--r-- | fs/f2fs/super.c | 46 |
2 files changed, 47 insertions, 0 deletions
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 467d42d..c7620b9 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -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 */ diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index 75c7dc3..70dbb31 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -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(); |