nilfs2: record used amount of each checkpoint in checkpoint list
This records the number of used blocks per checkpoint in each
checkpoint entry of cpfile. Even though userland tools can get the
block count via nilfs_get_cpinfo ioctl, it was not updated by the
nilfs2 kernel code. This fixes the issue and makes it available for
userland tools to calculate used amount per checkpoint.
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Cc: Jiro SEKIBA <jir@unicus.jp>
diff --git a/include/linux/nilfs2_fs.h b/include/linux/nilfs2_fs.h
index 3a65e5a..ae33ac2 100644
--- a/include/linux/nilfs2_fs.h
+++ b/include/linux/nilfs2_fs.h
@@ -216,8 +216,10 @@
* If there is a bit set in the incompatible feature set that the kernel
* doesn't know about, it should refuse to mount the filesystem.
*/
+#define NILFS_FEATURE_COMPAT_RO_BLOCK_COUNT 0x00000001ULL
+
#define NILFS_FEATURE_COMPAT_SUPP 0ULL
-#define NILFS_FEATURE_COMPAT_RO_SUPP 0ULL
+#define NILFS_FEATURE_COMPAT_RO_SUPP NILFS_FEATURE_COMPAT_RO_BLOCK_COUNT
#define NILFS_FEATURE_INCOMPAT_SUPP 0ULL
/*
@@ -509,7 +511,7 @@
__le64 cp_create;
__le64 cp_nblk_inc;
__le64 cp_inodes_count;
- __le64 cp_blocks_count; /* Reserved (might be deleted) */
+ __le64 cp_blocks_count;
/* Do not change the byte offset of ifile inode.
To keep the compatibility of the disk format,