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ext4, jbd2: ensure panic when aborting with zero errno 

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: 4327ba52af ("ext4, jbd2: ensure entering into panic after recording an error in superblock")
Signed-off-by: zhangyi (F) <yi.zhang@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20191204124614.45424-3-yi.zhang@huawei.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
alistair/sensors
zhangyi (F) 2019-12-04 20:46:12 +08:00 committed by Theodore Ts'o
parent d0a186e0d3
commit 51f57b01e4
2 changed files with 5 additions and 12 deletions
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2
fs/jbd2/checkpoint.c
View File

@ -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 {

15
fs/jbd2/journal.c
View File

@ -2156,12 +2156,10 @@ 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);
}
/**
@ -2203,11 +2201,6 @@ 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)