lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <20210414134737.2366971-4-yi.zhang@huawei.com>
Date:   Wed, 14 Apr 2021 21:47:33 +0800
From:   Zhang Yi <yi.zhang@...wei.com>
To:     <linux-ext4@...r.kernel.org>
CC:     <linux-fsdevel@...r.kernel.org>, <tytso@....edu>,
        <adilger.kernel@...ger.ca>, <jack@...e.cz>, <yi.zhang@...wei.com>,
        <yukuai3@...wei.com>
Subject: [RFC PATCH v2 3/7] jbd2: don't abort the journal when freeing buffers

Now, we can make sure to abort the journal once the original buffer was
failed to write back to disk, we can remove the journal abort logic in
jbd2_journal_try_to_free_buffers() which was introduced in
<c044f3d8360d> ("jbd2: abort journal if free a async write error
metadata buffer"), because it may costs and propably not safe.

Signed-off-by: Zhang Yi <yi.zhang@...wei.com>
---
 fs/jbd2/transaction.c | 17 -----------------
 1 file changed, 17 deletions(-)

diff --git a/fs/jbd2/transaction.c b/fs/jbd2/transaction.c
index 9396666b7314..3e0db4953fe4 100644
--- a/fs/jbd2/transaction.c
+++ b/fs/jbd2/transaction.c
@@ -2118,7 +2118,6 @@ int jbd2_journal_try_to_free_buffers(journal_t *journal, struct page *page)
 {
 	struct buffer_head *head;
 	struct buffer_head *bh;
-	bool has_write_io_error = false;
 	int ret = 0;
 
 	J_ASSERT(PageLocked(page));
@@ -2143,26 +2142,10 @@ int jbd2_journal_try_to_free_buffers(journal_t *journal, struct page *page)
 		jbd2_journal_put_journal_head(jh);
 		if (buffer_jbd(bh))
 			goto busy;
-
-		/*
-		 * If we free a metadata buffer which has been failed to
-		 * write out, the jbd2 checkpoint procedure will not detect
-		 * this failure and may lead to filesystem inconsistency
-		 * after cleanup journal tail.
-		 */
-		if (buffer_write_io_error(bh)) {
-			pr_err("JBD2: Error while async write back metadata bh %llu.",
-			       (unsigned long long)bh->b_blocknr);
-			has_write_io_error = true;
-		}
 	} while ((bh = bh->b_this_page) != head);
 
 	ret = try_to_free_buffers(page);
-
 busy:
-	if (has_write_io_error)
-		jbd2_journal_abort(journal, -EIO);
-
 	return ret;
 }
 
-- 
2.25.4

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ