linux-ext4 - [PATCH v5 2/3] ext4: add journal cycled recording support

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Message-Id: <20230322013353.1843306-3-yi.zhang@huaweicloud.com>
Date:   Wed, 22 Mar 2023 09:33:52 +0800
From:   Zhang Yi <yi.zhang@...weicloud.com>
To:     linux-ext4@...r.kernel.org
Cc:     tytso@....edu, adilger.kernel@...ger.ca, jack@...e.cz,
        yi.zhang@...wei.com, yi.zhang@...weicloud.com, yukuai3@...wei.com
Subject: [PATCH v5 2/3] ext4: add journal cycled recording support

From: Zhang Yi <yi.zhang@...wei.com>

Always enable 'JBD2_CYCLE_RECORD' journal option on ext4, letting the
jbd2 continue to record new journal transactions from the recovered
journal head or the checkpointed transactions in the previous mount.

Signed-off-by: Zhang Yi <yi.zhang@...wei.com>
Reviewed-by: Jan Kara <jack@...e.cz>
---
 fs/ext4/super.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 88f7b8a88c76..9b46adae241b 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -5691,6 +5691,11 @@ static void ext4_init_journal_params(struct super_block *sb, journal_t *journal)
 		journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR;
 	else
 		journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR;
+	/*
+	 * Always enable journal cycle record option, letting the journal
+	 * records log transactions continuously between each mount.
+	 */
+	journal->j_flags |= JBD2_CYCLE_RECORD;
 	write_unlock(&journal->j_state_lock);
 }
 
-- 
2.31.1