| tune2fs metadata_csum test |
| Creating filesystem with 524288 1k blocks and 65536 inodes |
| Superblock backups stored on blocks: |
| 8193, 24577, 40961, 57345, 73729, 204801, 221185, 401409 |
| |
| Allocating group tables: done |
| Writing inode tables: done |
| Creating journal (16384 blocks): done |
| mke2fs: Operation not supported for inodes containing extents while creating huge files |
| Writing superblocks and filesystem accounting information: done |
| |
| Pass 1: Checking inodes, blocks, and sizes |
| Pass 2: Checking directory structure |
| Pass 3: Checking directory connectivity |
| Pass 4: Checking reference counts |
| Pass 5: Checking group summary information |
| |
| Exit status is 0 |
| tune2fs -O metadata_csum test.img |
| Extents are not enabled. The file extent tree can be checksummed, whereas block maps cannot. Not enabling extents reduces the coverage of metadata checksumming. Re-run with -O extent to rectify. |
| 64-bit filesystem support is not enabled. The larger fields afforded by this feature enable full-strength checksumming. Run resize2fs -b to rectify. |
| Exit status is 0 |
| |
| Change in FS metadata: |
| @@ -2,7 +2,7 @@ |
| Last mounted on: <not available> |
| Filesystem magic number: 0xEF53 |
| Filesystem revision #: 1 (dynamic) |
| -Filesystem features: has_journal ext_attr resize_inode dir_index filetype sparse_super large_file |
| +Filesystem features: has_journal ext_attr resize_inode dir_index filetype sparse_super large_file metadata_csum |
| Default mount options: user_xattr acl |
| Filesystem state: clean |
| Errors behavior: Continue |
| @@ -29,6 +29,7 @@ |
| Journal inode: 8 |
| Default directory hash: half_md4 |
| Journal backup: inode blocks |
| +Checksum type: crc32c |
| Journal features: (none) |
| Journal size: 16M |
| Journal length: 16384 |
| @@ -36,7 +37,7 @@ |
| Journal start: 0 |
| |
| |
| -Group 0: (Blocks 1-8192) |
| +Group 0: (Blocks 1-8192) [ITABLE_ZEROED] |
| Primary superblock at 1, Group descriptors at 2-3 |
| Reserved GDT blocks at 4-259 |
| Block bitmap at 260 (+259) |
| @@ -45,7 +46,7 @@ |
| 0 free blocks, 1013 free inodes, 2 directories |
| Free blocks: |
| Free inodes: 12-1024 |
| -Group 1: (Blocks 8193-16384) |
| +Group 1: (Blocks 8193-16384) [ITABLE_ZEROED] |
| Backup superblock at 8193, Group descriptors at 8194-8195 |
| Reserved GDT blocks at 8196-8451 |
| Block bitmap at 8452 (+259) |
| @@ -54,6 +55,6 @@ |
| 0 free blocks, 1024 free inodes, 0 directories |
| Free blocks: |
| Free inodes: 1025-2048 |
| -Group 2: (Blocks 16385-24576) |
| +Group 2: (Blocks 16385-24576) [ITABLE_ZEROED] |
| Block bitmap at 16385 (+0) |
| Inode bitmap at 16386 (+1) |
| Pass 1: Checking inodes, blocks, and sizes |
| Pass 2: Checking directory structure |
| Pass 3: Checking directory connectivity |
| Pass 4: Checking reference counts |
| Pass 5: Checking group summary information |
| |
| Exit status is 0 |