fsck.ubifs: Replay journal

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 <chengzhihao1@huawei.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>

1 files changed, 13 insertions, 0 deletions

diff --git a/ubifs-utils/libubifs/tnc.c b/ubifs-utils/libubifs/tnc.c
index 12c56e0..cd1013d 100644
--- a/ubifs-utils/libubifs/tnc.c
+++ b/ubifs-utils/libubifs/tnc.c
@@ -2402,9 +2402,22 @@ int ubifs_tnc_remove_ino(struct ubifs_info *c, ino_t inum)
 
 		xent = ubifs_tnc_next_ent(c, &key1, &nm);
 		if (IS_ERR(xent)) {
+			unsigned int reason;
+
 			err = PTR_ERR(xent);
 			if (err == -ENOENT)
 				break;
+
+			reason = get_failure_reason_callback(c);
+			if (reason & FR_DATA_CORRUPTED) {
+				test_and_clear_failure_reason_callback(c, FR_DATA_CORRUPTED);
+				if (handle_failure_callback(c, FR_H_TNC_DATA_CORRUPTED, NULL)) {
+					/* Set %FR_LPT_INCORRECT for lpt status. */
+					set_lpt_invalid_callback(c, FR_LPT_INCORRECT);
+					/* Leave xattrs to be deleted by subsequent steps */
+					break;
+				}
+			}
 			kfree(pxent);
 			return err;
 		}