ext4: Track lifetime disk writes

[linux-2.6-omap-h63xx.git] / fs / ext4 / super.c

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index a3768709ce05f109ef749b421a3cc1a2a727bac4..30fc27cdf8fc90673414e0e11bc946128a6b6faa 100644 (file)
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -2035,6 +2035,8 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
        sbi->s_resgid = EXT4_DEF_RESGID;
        sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS;
        sbi->s_sb_block = sb_block;
+       sbi->s_sectors_written_start = part_stat_read(sb->s_bdev->bd_part,
+                                                     sectors[1]);
 
        unlock_kernel();
 
@@ -2072,6 +2074,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
        sb->s_magic = le16_to_cpu(es->s_magic);
        if (sb->s_magic != EXT4_SUPER_MAGIC)
                goto cantfind_ext4;
+       sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written);
 
        /* Set defaults before we parse the mount options */
        def_mount_opts = le32_to_cpu(es->s_default_mount_opts);
@@ -2921,6 +2924,10 @@ static int ext4_commit_super(struct super_block *sb,
                set_buffer_uptodate(sbh);
        }
        es->s_wtime = cpu_to_le32(get_seconds());
+       es->s_kbytes_written =
+               cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + 
+                           ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) -
+                             EXT4_SB(sb)->s_sectors_written_start) >> 1));
        ext4_free_blocks_count_set(es, percpu_counter_sum_positive(
                                        &EXT4_SB(sb)->s_freeblocks_counter));
        es->s_free_inodes_count = cpu_to_le32(percpu_counter_sum_positive(