I found a bug there. Could you test the following patch? Thanks, :) --- From 44849048bd1173ac6e83cb01d426dc5109922064 Mon Sep 17 00:00:00 2001 From: Jaegeuk Kim <jaegeuk.kim@xxxxxxxxxxx> Date: Wed, 12 Dec 2012 19:45:49 +0900 Subject: [PATCH] f2fs: fix wrong calculation on f_files in statfs In f2fs_statfs(), f_files should be the total number of available inodes instead of the currently allocated inodes. So, this patch should resolve the reported bug below. Note that, showing 10% usage is not a bug, since f2fs reveals whole volume size as much as possible and shows the space overhead as *used*. This policy is fair enough with respect to other file systems. <Reported Bug> (loop0 is backed by 1GiB file) $ mkfs.f2fs /dev/loop0 F2FS-tools: Ver: 1.1.0 (2012-12-11) Info: sector size = 512 Info: total sectors = 2097152 (in 512bytes) Info: zone aligned segment0 blkaddr: 512 Info: format successful $ mount /dev/loop0 mnt/ $ df mnt/ Filesystem 1K-blocks Used Available Use% Mounted on /dev/loop0 1046528 98312 929784 10% /home/zeta/linux-devel/mtd-bench/mnt $ df mnt/ -i Filesystem Inodes IUsed IFree IUse% Mounted on /dev/loop0 1 -465918 465919 - /home/zeta/linux-devel/mtd-bench/mnt Notice IUsed is negative. Also, 10% usage on a fresh f2fs seems too much to be correct. Reported-by: Ezequiel Garcia <elezegarcia@xxxxxxxxx> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@xxxxxxxxxxx> --- fs/f2fs/super.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index 1386732..f4d9e03 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -148,8 +148,8 @@ static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf) buf->f_bfree = buf->f_blocks - valid_user_blocks(sbi) - ovp_count; buf->f_bavail = user_block_count - valid_user_blocks(sbi); - buf->f_files = valid_inode_count(sbi); - buf->f_ffree = sbi->total_node_count - valid_node_count(sbi); + buf->f_files = sbi->total_node_count; + buf->f_ffree = sbi->total_node_count - valid_inode_count(sbi); buf->f_namelen = F2FS_MAX_NAME_LEN; buf->f_fsid.val[0] = (u32)id; -- 1.8.0.1.250.gb7973fb -- Jaegeuk Kim Samsung
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