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From: "zhangyi (F)" <yi.zhang@huawei.com>
To: <linux-ext4@vger.kernel.org>
Cc: <jack@suse.com>, <tytso@mit.edu>, <adilger.kernel@dilger.ca>,
	<yi.zhang@huawei.com>, <liangyun2@huawei.com>,
	<luoshijie1@huawei.com>
Subject: [PATCH v3 2/4] ext4, jbd2: ensure panic when aborting with zero errno
Date: Wed, 4 Dec 2019 20:46:12 +0800
Message-ID: <20191204124614.45424-3-yi.zhang@huawei.com> (raw)
In-Reply-To: <20191204124614.45424-1-yi.zhang@huawei.com>

JBD2_REC_ERR flag used to indicate the errno has been updated when jbd2
aborted, and then __ext4_abort() and ext4_handle_error() can invoke
panic if ERRORS_PANIC is specified. But if the journal has been aborted
with zero errno, jbd2_journal_abort() didn't set this flag so we can
no longer panic. Fix this by always record the proper errno in the
journal superblock.

Fixes: 4327ba52afd03 ("ext4, jbd2: ensure entering into panic after recording an error in superblock")
Signed-off-by: zhangyi (F) <yi.zhang@huawei.com>
---
 fs/jbd2/checkpoint.c |  2 +-
 fs/jbd2/journal.c    | 15 ++++-----------
 2 files changed, 5 insertions(+), 12 deletions(-)

diff --git a/fs/jbd2/checkpoint.c b/fs/jbd2/checkpoint.c
index a1909066bde6..62cf497f18eb 100644
--- a/fs/jbd2/checkpoint.c
+++ b/fs/jbd2/checkpoint.c
@@ -164,7 +164,7 @@ void __jbd2_log_wait_for_space(journal_t *journal)
 				       "journal space in %s\n", __func__,
 				       journal->j_devname);
 				WARN_ON(1);
-				jbd2_journal_abort(journal, 0);
+				jbd2_journal_abort(journal, -EIO);
 			}
 			write_lock(&journal->j_state_lock);
 		} else {
diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index 1c58859aa592..b2d6e7666d0f 100644
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -2118,12 +2118,10 @@ static void __journal_abort_soft (journal_t *journal, int errno)
 
 	__jbd2_journal_abort_hard(journal);
 
-	if (errno) {
-		jbd2_journal_update_sb_errno(journal);
-		write_lock(&journal->j_state_lock);
-		journal->j_flags |= JBD2_REC_ERR;
-		write_unlock(&journal->j_state_lock);
-	}
+	jbd2_journal_update_sb_errno(journal);
+	write_lock(&journal->j_state_lock);
+	journal->j_flags |= JBD2_REC_ERR;
+	write_unlock(&journal->j_state_lock);
 }
 
 /**
@@ -2165,11 +2163,6 @@ static void __journal_abort_soft (journal_t *journal, int errno)
  * failure to disk.  ext3_error, for example, now uses this
  * functionality.
  *
- * Errors which originate from within the journaling layer will NOT
- * supply an errno; a null errno implies that absolutely no further
- * writes are done to the journal (unless there are any already in
- * progress).
- *
  */
 
 void jbd2_journal_abort(journal_t *journal, int errno)
-- 
2.17.2


  parent reply index

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-04 12:46 [PATCH v3 0/4] ext4, jbd2: improve aborting progress zhangyi (F)
2019-12-04 12:46 ` [PATCH v3 1/4] jbd2: switch to use jbd2_journal_abort() when failed to submit the commit record zhangyi (F)
2019-12-04 12:46 ` zhangyi (F) [this message]
2019-12-04 12:52   ` [PATCH v3 2/4] ext4, jbd2: ensure panic when aborting with zero errno Jan Kara
2019-12-04 12:46 ` [PATCH v3 3/4] jbd2: make sure ESHUTDOWN to be recorded in the journal superblock zhangyi (F)
2019-12-04 17:05   ` Jan Kara
2019-12-05  1:23     ` zhangyi (F)
2019-12-04 12:46 ` [PATCH v3 4/4] jbd2: clean __jbd2_journal_abort_hard() and __journal_abort_soft() zhangyi (F)
2019-12-04 17:05   ` Jan Kara

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