From: Kemeng Shi <shikemeng@huaweicloud.com>
Date: Thu, 1 Aug 2024 01:38:08 +0000 (+0800)
Subject: jbd2: correctly compare tids with tid_geq function in jbd2_fc_begin_commit
X-Git-Url: http://git.hungrycats.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e58e570a88f0c62d4043d2b99b0ddb237c1f6ff8;p=linux

jbd2: correctly compare tids with tid_geq function in jbd2_fc_begin_commit

commit f0e3c14802515f60a47e6ef347ea59c2733402aa upstream.

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

Signed-off-by: Kemeng Shi <shikemeng@huaweicloud.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Zhang Yi <yi.zhang@huawei.com>
Cc: stable@kernel.org
Link: https://patch.msgid.link/20240801013815.2393869-2-shikemeng@huaweicloud.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index 7635e5411012..cca73b8282d1 100644
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -725,7 +725,7 @@ 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;
 	}