[PATCH 6/20] fs/fat: return f_fsid for statfs(2)

[PATCH 6/20] fs/fat: return f_fsid for statfs(2)

[Coly Li]

This patch makes fat return f_fsid info for statfs(2).

Signed-off-by: Coly Li <coly.li@suse.de>
Cc: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
---
 fs/fat/inode.c |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)

diff --git a/fs/fat/inode.c b/fs/fat/inode.c
index 6b74d09..c093b7f 100644
--- a/fs/fat/inode.c
+++ b/fs/fat/inode.c
@@ -523,7 +523,9 @@ static int fat_remount(struct super_block *sb, int *flags, char *data)

 static int fat_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
-	struct msdos_sb_info *sbi = MSDOS_SB(dentry->d_sb);
+	struct super_block *sb = dentry->d_sb;
+	struct msdos_sb_info *sbi = MSDOS_SB(sb);
+	u64 id = huge_encode_dev(sb->s_bdev->bd_dev);

 	/* If the count of free cluster is still unknown, counts it here. */
 	if (sbi->free_clusters == -1 || !sbi->free_clus_valid) {
@@ -537,6 +539,8 @@ static int fat_statfs(struct dentry *dentry, struct kstatfs *buf)
 	buf->f_blocks = sbi->max_cluster - FAT_START_ENT;
 	buf->f_bfree = sbi->free_clusters;
 	buf->f_bavail = sbi->free_clusters;
+	buf->f_fsid.val[0] = (u32)id;
+	buf->f_fsid.val[1] = (u32)(id >> 32);
 	buf->f_namelen = sbi->options.isvfat ? 260 : 12;

 	return 0;
-- 
Coly Li
SuSE Labs

Re: [PATCH 6/20] fs/fat: return f_fsid for statfs(2)

[OGAWA Hirofumi]

Coly Li <coly.li@suse.de> writes:

> This patch makes fat return f_fsid info for statfs(2).

Looks good to me.

Acked-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>

Thanks.

> Signed-off-by: Coly Li <coly.li@suse.de>
> Cc: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
> ---
>  fs/fat/inode.c |    6 +++++-
>  1 files changed, 5 insertions(+), 1 deletions(-)
>
> diff --git a/fs/fat/inode.c b/fs/fat/inode.c
> index 6b74d09..c093b7f 100644
> --- a/fs/fat/inode.c
> +++ b/fs/fat/inode.c
> @@ -523,7 +523,9 @@ static int fat_remount(struct super_block *sb, int *flags, char *data)
>
>  static int fat_statfs(struct dentry *dentry, struct kstatfs *buf)
>  {
> -	struct msdos_sb_info *sbi = MSDOS_SB(dentry->d_sb);
> +	struct super_block *sb = dentry->d_sb;
> +	struct msdos_sb_info *sbi = MSDOS_SB(sb);
> +	u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
>
>  	/* If the count of free cluster is still unknown, counts it here. */
>  	if (sbi->free_clusters == -1 || !sbi->free_clus_valid) {
> @@ -537,6 +539,8 @@ static int fat_statfs(struct dentry *dentry, struct kstatfs *buf)
>  	buf->f_blocks = sbi->max_cluster - FAT_START_ENT;
>  	buf->f_bfree = sbi->free_clusters;
>  	buf->f_bavail = sbi->free_clusters;
> +	buf->f_fsid.val[0] = (u32)id;
> +	buf->f_fsid.val[1] = (u32)(id >> 32);
>  	buf->f_namelen = sbi->options.isvfat ? 260 : 12;
>
>  	return 0;

-- 
OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>