btrfs-progs: Add command btrfs filesystem disk-usage

Signed-off-by: Goffredo Baroncelli <kreijack@inwind.it>
Signed-off-by: David Sterba <dsterba@suse.cz>

1 files changed, 16 insertions, 0 deletions

diff --git a/utils.c b/utils.c
index 7f822a91..1fb23776 100644
--- a/utils.c
+++ b/utils.c
@@ -2505,3 +2505,19 @@ u64 disk_size(char *path)
 	else
 		return sfs.f_bsize * sfs.f_blocks;
 }
+
+u64 get_partition_size(char *dev)
+{
+	u64 result;
+	int fd = open(dev, O_RDONLY);
+
+	if (fd < 0)
+		return 0;
+	if (ioctl(fd, BLKGETSIZE64, &result) < 0) {
+		close(fd);
+		return 0;
+	}
+	close(fd);
+
+	return result;
+}