File bsc1216834-fsck.ocfs2-add-the-ability-to-clear-jbd2-errno.patch of Package ocfs2-tools.34411

From 78060fac433ec659c168fb4dcea6fb087b0fffbf Mon Sep 17 00:00:00 2001
From: Heming Zhao <heming.zhao@suse.com>
Date: Tue, 26 Mar 2024 21:31:03 +0800
Subject: [PATCH 2/2] fsck.ocfs2: add the ability to clear jbd2 errno

For fsck, there is no chance to detect and clean jbd2 errno. Once jbd2
errno has been set, ocfs2 always reports errno when mounting. This errno
reporting confuses users.
This patch adds the ability to detect & clear jbd2 errno for fsck.

Signed-off-by: Heming Zhao <heming.zhao@suse.com>
---
 fsck.ocfs2/journal.c | 73 +++++++++++++++++++++++++++++++++++++++-----
 1 file changed, 66 insertions(+), 7 deletions(-)

diff --git a/fsck.ocfs2/journal.c b/fsck.ocfs2/journal.c
index 95262d327e91..6364426872cf 100644
--- a/fsck.ocfs2/journal.c
+++ b/fsck.ocfs2/journal.c
@@ -453,7 +453,8 @@ static errcode_t walk_journal(ocfs2_filesys *fs, int slot,
 }
 
 static errcode_t prep_journal_info(ocfs2_filesys *fs, int slot,
-			           struct journal_info *ji)
+			           struct journal_info *ji,
+			           int check_dup, int force_read_jsb)
 {
 	errcode_t err;
 
@@ -479,10 +480,10 @@ static errcode_t prep_journal_info(ocfs2_filesys *fs, int slot,
 	}
 
 	if (!(ji->ji_cinode->ci_inode->id1.journal1.ij_flags &
-	      OCFS2_JOURNAL_DIRTY_FL))
+	      OCFS2_JOURNAL_DIRTY_FL) && !force_read_jsb)
 		goto out;
 
-	err = lookup_journal_block(fs, ji, 0, &ji->ji_jsb_block, 1);
+	err = lookup_journal_block(fs, ji, 0, &ji->ji_jsb_block, check_dup);
 	if (err)
 		goto out;
 
@@ -641,7 +642,7 @@ errcode_t o2fsck_replay_journals(ocfs2_filesys *fs, int *replayed)
 		ji->ji_slot = i;
 
 		/* sets ji->ji_replay */
-		err = prep_journal_info(fs, i, ji);
+		err = prep_journal_info(fs, i, ji, 1, 0);
 		if (err) {
 			printf("Slot %d seems to have a corrupt journal.\n",
 			       i);
@@ -649,6 +650,11 @@ errcode_t o2fsck_replay_journals(ocfs2_filesys *fs, int *replayed)
 			continue;
 		}
 
+		if (ji->ji_jsb->s_errno) {
+			printf("Found jbd2 super block error status %d "
+				"on slot %d.\n", ji->ji_jsb->s_errno, i);
+		}
+
 		if (!ji->ji_replay) {
 			verbosef("slot %d is clean\n", i);
 			continue;
@@ -1068,12 +1074,65 @@ bail:
 	return ret;
 }
 
+static errcode_t ocfs2_clear_journal_errno(ocfs2_filesys *fs,
+				struct ocfs2_dinode *di,
+				int slot)
+{
+	errcode_t ret = 0;
+	struct journal_info ji;
+	journal_superblock_t *jsb;
+	int tmp_errno;
+
+	ji.ji_slot = slot;
+	ret = prep_journal_info(fs, slot, &ji, 0, 1);
+	if (ret) {
+		printf("Slot %d seems to have a corrupt journal.\n", slot);
+		goto bail;
+	}
+
+	jsb = ji.ji_jsb;
+	if (!jsb->s_errno)
+		goto bail;
+
+	tmp_errno = jsb->s_errno;
+	jsb->s_errno = 0;
+	ret = ocfs2_write_journal_superblock(fs,
+			ji.ji_jsb_block, (char *)jsb);
+	if (ret) {
+		com_err(whoami, ret, "while writing slot %d's jbd2 "
+				"super block, blkno:%lu",
+				slot, ji.ji_jsb_block);
+	}
+	printf("Clear jbd2 super block errno (%d) on slot %d\n",
+			tmp_errno, slot);
+
+bail:
+	return ret;
+}
+
 errcode_t o2fsck_clear_journal_flags(o2fsck_state *ost)
 {
-	if (!ost->ost_has_journal_dirty)
-		return 0;
+	errcode_t ret = 0;
 
-	return handle_slots_system_file(ost->ost_fs,
+	if (ost->ost_has_journal_dirty) {
+		ret = handle_slots_system_file(ost->ost_fs,
 					JOURNAL_SYSTEM_INODE,
 					ocfs2_clear_journal_flag);
+		if (ret) {
+			printf("Clean journal flag failed\n");
+			goto out;
+		}
+	}
+
+	/* There is a special hack for forcibly clearing
+	 * jbd2 errno. */
+	ret = handle_slots_system_file(ost->ost_fs,
+					JOURNAL_SYSTEM_INODE,
+					ocfs2_clear_journal_errno);
+	if (ret) {
+		printf("Clean jbd2 flag failed\n");
+		goto out;
+	}
+out:
+	return ret;
 }
-- 
2.35.3