mtd-utils.git/ubifs-utils/libubifs/tnc.c, branch v2.3.1

fsck.ubifs: Move common functions and data structures into fsck.ubifs.c

2024-11-11T09:32:46+00:00

This is a preparation for adding TNC checking support. Following data structures and functions are moved into fsck.ubifs.c: 1. Move 'scanned_files' and 'used_lebs' from rebuild module, make them resuable for non-rebuild_fs modes. 2. Move function 'handle_error' from load_fs.c, it could be reused in other steps. 3. Add new function ubifs_tnc_remove_node in libubifs, which could remove index entry for a node by given position. Signed-off-by: Zhihao Cheng Signed-off-by: David Oberhollenzer

fsck.ubifs: Replay journal

2024-11-11T09:32:46+00:00

This is the 2/18 step of fsck. Replay journal, update TNC & LPT. There could be following steps and possible errors: Step 1. scan log LEB, get all bud LEBs a. corrupted scanning data in log area: danger mode with rebuild_fs and normal mode with 'yes' answer will turn to rebuild filesystem, other modes will exit. Step 2. scan bud LEBs, get all nodes a. corrupted scanning data in bud LEB: danger mode and normal mode with 'yes' answer will drop bud LEB and set %FR_LPT_INCORRECT for lpt status, other modes will exit. Step 3. apply nodes, record latest isize into size_tree Step 4. apply nodes, update TNC & LPT a. corrupted data searched from TNC: skip node and set %FR_LPT_INCORRECT lpt status for danger mode and normal mode with 'yes' answer, other modes will exit. b. corrupted index node read from TNC: danger mode with rebuild_fs and normal mode with 'yes' answer will turn to rebuild filesystem, other modes will exit. c. corrupted lpt: Set %FR_LPT_CORRUPTED for lpt status. Ignore the error. d. incorrect lpt: Set %FR_LPT_INCORRECT for lpt status. Ignore the error. e. If lpt status is not empty, skip updating lpt. Signed-off-by: Zhihao Cheng Signed-off-by: David Oberhollenzer

ubifs-utils: Adapt tnc subsystem in libubifs

2024-11-11T09:32:45+00:00

Adapt tnc subsystem(tnc.c,tnc_misc.c,tnc_commit.c) in libubifs, compared with linux kernel implementations: 1. Remove debug related functions(eg. dbg_check_inode_size), debug functions are not needed by fsck, because fsck will check fs in another way. 2. Remove some functions(eg. ubifs_tnc_bulk_read) which won't be used in fsck/mkfs. 3. Adapt tnc_delete and ubifs_search_zbranch to handle empty TNC case, which could happen in fsck. 4. Don't skip checking the length of non-leaf index node's branch in read_znode. 5. Adapt try_read_node to ignore %-EBADMSG, subsequent steps will check nodes carefully. Signed-off-by: Zhihao Cheng Signed-off-by: David Oberhollenzer

ubifs-utils: Import UBIFS libs from linux kernel

2024-11-11T09:32:45+00:00

Import UBIFS libs from linux kernel. Next patches will replace ubifs related source code with implementation of linux kernel, which makes userspace implementation be same with linux kernel, then fsck.ubifs can resuse the code. Notice: lpt.c is modified with [1] applied. ubifs.h and orphan.c are modified with [2] applied, journal.c is modified with [3] reverted( because fsck runs in a single thread, so waitqueue is not needed to be implemented in userspace.). [1] https://lore.kernel.org/linux-mtd/20231228014112.2836317-13-chengzhihao1@huawei.com/ [2] https://lore.kernel.org/linux-mtd/20240410073751.2522830-1-chengzhihao1@huawei.com/ [3] https://lore.kernel.org/linux-mtd/20240122063103.359501-1-chengzhihao1@huawei.com/ Signed-off-by: Zhihao Cheng Signed-off-by: David Oberhollenzer