linux-kernel - [PATCH 1/7] jbd2: correctly compare tids with tid_geq function in jbd2_fc_begin

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Message-Id: <20240730113335.2365290-2-shikemeng@huaweicloud.com>
Date: Tue, 30 Jul 2024 19:33:29 +0800
From: Kemeng Shi <shikemeng@...weicloud.com>
To: tytso@....edu,
	jack@...e.com
Cc: linux-ext4@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 1/7] jbd2: correctly compare tids with tid_geq function in jbd2_fc_begin_commit

Use tid_geq to compare tids to work over sequence number wraps.

Signed-off-by: Kemeng Shi <shikemeng@...weicloud.com>
---
 fs/jbd2/journal.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index 1ebf2393bfb7..da5a56d700f1 100644
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -710,7 +710,7 @@ int jbd2_fc_begin_commit(journal_t *journal, tid_t tid)
 		return -EINVAL;
 
 	write_lock(&journal->j_state_lock);
-	if (tid <= journal->j_commit_sequence) {
+	if (tid_geq(journal->j_commit_sequence, tid)) {
 		write_unlock(&journal->j_state_lock);
 		return -EALREADY;
 	}
-- 
2.30.0