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Date: Wed, 12 Mar 2014 16:44:49 -0400
From: Theodore Ts'o <tytso@....edu>
To: Ext4 Developers List <linux-ext4@...r.kernel.org>
Cc: Theodore Ts'o <tytso@....edu>
Subject: [PATCH] jbd2: improve error messages for inconsistent journal heads
Fix up error messages printed when the transaction pointers in a
journal head are inconsistent. This improves the error messages which
are printed when running xfstests generic/068 in data=journal mode.
See the bug report at: https://bugzilla.kernel.org/show_bug.cgi?id=60786
Signed-off-by: "Theodore Ts'o" <tytso@....edu>
---
fs/ext4/ext4_jbd2.c | 10 ++++++++++
fs/jbd2/transaction.c | 33 ++++++++++++++-------------------
2 files changed, 24 insertions(+), 19 deletions(-)
diff --git a/fs/ext4/ext4_jbd2.c b/fs/ext4/ext4_jbd2.c
index 3fe29de..c3fb607 100644
--- a/fs/ext4/ext4_jbd2.c
+++ b/fs/ext4/ext4_jbd2.c
@@ -259,6 +259,16 @@ int __ext4_handle_dirty_metadata(const char *where, unsigned int line,
if (WARN_ON_ONCE(err)) {
ext4_journal_abort_handle(where, line, __func__, bh,
handle, err);
+ if (inode == NULL) {
+ pr_err("EXT4: jbd2_journal_dirty_metadata "
+ "failed: handle type %u started at "
+ "line %u, credits %u/%u, errcode %d",
+ handle->h_type,
+ handle->h_line_no,
+ handle->h_requested_credits,
+ handle->h_buffer_credits, err);
+ return err;
+ }
ext4_error_inode(inode, where, line,
bh->b_blocknr,
"journal_dirty_metadata failed: "
diff --git a/fs/jbd2/transaction.c b/fs/jbd2/transaction.c
index d999b1f..38cfcf5 100644
--- a/fs/jbd2/transaction.c
+++ b/fs/jbd2/transaction.c
@@ -1313,7 +1313,7 @@ int jbd2_journal_dirty_metadata(handle_t *handle, struct buffer_head *bh)
journal->j_running_transaction)) {
printk(KERN_ERR "JBD2: %s: "
"jh->b_transaction (%llu, %p, %u) != "
- "journal->j_running_transaction (%p, %u)",
+ "journal->j_running_transaction (%p, %u)\n",
journal->j_devname,
(unsigned long long) bh->b_blocknr,
jh->b_transaction,
@@ -1336,30 +1336,25 @@ int jbd2_journal_dirty_metadata(handle_t *handle, struct buffer_head *bh)
*/
if (jh->b_transaction != transaction) {
JBUFFER_TRACE(jh, "already on other transaction");
- if (unlikely(jh->b_transaction !=
- journal->j_committing_transaction)) {
- printk(KERN_ERR "JBD2: %s: "
- "jh->b_transaction (%llu, %p, %u) != "
- "journal->j_committing_transaction (%p, %u)",
+ if (unlikely(((jh->b_transaction !=
+ journal->j_committing_transaction)) ||
+ (jh->b_next_transaction != transaction))) {
+ printk(KERN_ERR "jbd2_journal_dirty_metadata: %s: "
+ "bad jh for block %llu: "
+ "transaction (%p, %u), "
+ "jh->b_transaction (%p, %u), "
+ "jh->b_next_transaction (%p, %u), jlist %u\n",
journal->j_devname,
(unsigned long long) bh->b_blocknr,
+ transaction, transaction->t_tid,
jh->b_transaction,
- jh->b_transaction ? jh->b_transaction->t_tid : 0,
- journal->j_committing_transaction,
- journal->j_committing_transaction ?
- journal->j_committing_transaction->t_tid : 0);
- ret = -EINVAL;
- }
- if (unlikely(jh->b_next_transaction != transaction)) {
- printk(KERN_ERR "JBD2: %s: "
- "jh->b_next_transaction (%llu, %p, %u) != "
- "transaction (%p, %u)",
- journal->j_devname,
- (unsigned long long) bh->b_blocknr,
+ jh->b_transaction ?
+ jh->b_transaction->t_tid : 0,
jh->b_next_transaction,
jh->b_next_transaction ?
jh->b_next_transaction->t_tid : 0,
- transaction, transaction->t_tid);
+ jh->b_jlist);
+ WARN_ON(1);
ret = -EINVAL;
}
/* And this case is illegal: we can't reuse another
--
1.9.0
--
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