This commit fixes removing indirect blocks (marking them as 0)
in the inode structure. Previous version of the code was removing
the top-level blocks only when the first removed block was
one of the first 12 direct blocks. However, when the first removed
block is the first block in the referenced block list, its parent
(indirect block) should also be removed.
Signed-off-by: Franciszek Pindel <fpindel@antmicro.com>
This commits changes how data on the disk is accessed. There are disk
structures which are packed and their fields are stored in little endian
byte order. To use data in the program structures it has to be translated
from little endian to cpu endianness.
Signed-off-by: Franciszek Zdobylak <fzdobylak@antmicro.com>
- `ext2_file` and `ext2_dir` merged into one struct and allocated from
dedicated slab
- `ext2_inode` allocated from dedicated slab
- `ext2_disk_dentry` allocated from heap (because their size is not
constant)
- `ext2_bgroup` and `ext2_disk_superblock` statically allocated
Signed-off-by: Franciszek Zdobylak <fzdobylak@antmicro.com>
Fix the behavior when data should be written to storage device. Now all
writes are done directly to disk_access layer (where it might possibly
be cached).
Signed-off-by: Franciszek Zdobylak <fzdobylak@antmicro.com>
Added funtion that takes specified action when file system corruption is
detected. Possible actions are: do nothing, make mount point read-only,
panic.
Signed-off-by: Franciszek Zdobylak <fzdobylak@antmicro.com>
Changes:
- Added few assertions to check if some assumptions are correct
- Fix removing blocks during trucate and inode removal
- Clear entry in inode table after inode has been removed
Signed-off-by: Franciszek Zdobylak <fzdobylak@antmicro.com>
Changes:
- Add fs::sync function
- Make correct file system in mkfs
- Add few assertions to ensure that all assumptions are correct
Signed-off-by: Franciszek Zdobylak <fzdobylak@antmicro.com>
