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Date: Wed, 4 Dec 2019 18:05:55 +0100
From: Jan Kara <jack@...e.cz>
To: "zhangyi (F)" <yi.zhang@...wei.com>
Cc: linux-ext4@...r.kernel.org, jack@...e.com, tytso@....edu,
adilger.kernel@...ger.ca, liangyun2@...wei.com,
luoshijie1@...wei.com
Subject: Re: [PATCH v3 4/4] jbd2: clean __jbd2_journal_abort_hard() and
__journal_abort_soft()
On Wed 04-12-19 20:46:14, zhangyi (F) wrote:
> __jbd2_journal_abort_hard() has never been used, now we can merge
> __jbd2_journal_abort_hard() and __journal_abort_soft() these two
> functions into jbd2_journal_abort() and remove them.
>
> Signed-off-by: zhangyi (F) <yi.zhang@...wei.com>
Looks good to me. You can add:
Reviewed-by: Jan Kara <jack@...e.cz>
Honza
> ---
> fs/jbd2/journal.c | 103 ++++++++++++++++++-------------------------
> include/linux/jbd2.h | 1 -
> 2 files changed, 42 insertions(+), 62 deletions(-)
>
> diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
> index 93be6e0311da..e59d9b6e4596 100644
> --- a/fs/jbd2/journal.c
> +++ b/fs/jbd2/journal.c
> @@ -96,7 +96,6 @@ EXPORT_SYMBOL(jbd2_journal_release_jbd_inode);
> EXPORT_SYMBOL(jbd2_journal_begin_ordered_truncate);
> EXPORT_SYMBOL(jbd2_inode_cache);
>
> -static void __journal_abort_soft (journal_t *journal, int errno);
> static int jbd2_journal_create_slab(size_t slab_size);
>
> #ifdef CONFIG_JBD2_DEBUG
> @@ -805,7 +804,7 @@ int jbd2_journal_bmap(journal_t *journal, unsigned long blocknr,
> "at offset %lu on %s\n",
> __func__, blocknr, journal->j_devname);
> err = -EIO;
> - __journal_abort_soft(journal, err);
> + jbd2_journal_abort(journal, err);
> }
> } else {
> *retp = blocknr; /* +journal->j_blk_offset */
> @@ -2065,64 +2064,6 @@ int jbd2_journal_wipe(journal_t *journal, int write)
> return err;
> }
>
> -/*
> - * Journal abort has very specific semantics, which we describe
> - * for journal abort.
> - *
> - * Two internal functions, which provide abort to the jbd layer
> - * itself are here.
> - */
> -
> -/*
> - * Quick version for internal journal use (doesn't lock the journal).
> - * Aborts hard --- we mark the abort as occurred, but do _nothing_ else,
> - * and don't attempt to make any other journal updates.
> - */
> -void __jbd2_journal_abort_hard(journal_t *journal)
> -{
> - transaction_t *transaction;
> -
> - if (journal->j_flags & JBD2_ABORT)
> - return;
> -
> - printk(KERN_ERR "Aborting journal on device %s.\n",
> - journal->j_devname);
> -
> - write_lock(&journal->j_state_lock);
> - journal->j_flags |= JBD2_ABORT;
> - transaction = journal->j_running_transaction;
> - if (transaction)
> - __jbd2_log_start_commit(journal, transaction->t_tid);
> - write_unlock(&journal->j_state_lock);
> -}
> -
> -/* Soft abort: record the abort error status in the journal superblock,
> - * but don't do any other IO. */
> -static void __journal_abort_soft (journal_t *journal, int errno)
> -{
> - int old_errno;
> -
> - write_lock(&journal->j_state_lock);
> - old_errno = journal->j_errno;
> - if (!journal->j_errno || errno == -ESHUTDOWN)
> - journal->j_errno = errno;
> -
> - if (journal->j_flags & JBD2_ABORT) {
> - write_unlock(&journal->j_state_lock);
> - if (old_errno != -ESHUTDOWN && errno == -ESHUTDOWN)
> - jbd2_journal_update_sb_errno(journal);
> - return;
> - }
> - write_unlock(&journal->j_state_lock);
> -
> - __jbd2_journal_abort_hard(journal);
> -
> - jbd2_journal_update_sb_errno(journal);
> - write_lock(&journal->j_state_lock);
> - journal->j_flags |= JBD2_REC_ERR;
> - write_unlock(&journal->j_state_lock);
> -}
> -
> /**
> * void jbd2_journal_abort () - Shutdown the journal immediately.
> * @journal: the journal to shutdown.
> @@ -2166,7 +2107,47 @@ static void __journal_abort_soft (journal_t *journal, int errno)
>
> void jbd2_journal_abort(journal_t *journal, int errno)
> {
> - __journal_abort_soft(journal, errno);
> + transaction_t *transaction;
> +
> + /*
> + * ESHUTDOWN always takes precedence because a file system check
> + * caused by any other journal abort error is not required after
> + * a shutdown triggered.
> + */
> + write_lock(&journal->j_state_lock);
> + if (journal->j_flags & JBD2_ABORT) {
> + int old_errno = journal->j_errno;
> +
> + write_unlock(&journal->j_state_lock);
> + if (old_errno != -ESHUTDOWN && errno == -ESHUTDOWN) {
> + journal->j_errno = errno;
> + jbd2_journal_update_sb_errno(journal);
> + }
> + return;
> + }
> +
> + /*
> + * Mark the abort as occurred and start current running transaction
> + * to release all journaled buffer.
> + */
> + pr_err("Aborting journal on device %s.\n", journal->j_devname);
> +
> + journal->j_flags |= JBD2_ABORT;
> + journal->j_errno = errno;
> + transaction = journal->j_running_transaction;
> + if (transaction)
> + __jbd2_log_start_commit(journal, transaction->t_tid);
> + write_unlock(&journal->j_state_lock);
> +
> + /*
> + * Record errno to the journal super block, so that fsck and jbd2
> + * layer could realise that a filesystem check is needed.
> + */
> + jbd2_journal_update_sb_errno(journal);
> +
> + write_lock(&journal->j_state_lock);
> + journal->j_flags |= JBD2_REC_ERR;
> + write_unlock(&journal->j_state_lock);
> }
>
> /**
> diff --git a/include/linux/jbd2.h b/include/linux/jbd2.h
> index 603fbc4e2f70..e3e271bfb0e7 100644
> --- a/include/linux/jbd2.h
> +++ b/include/linux/jbd2.h
> @@ -1402,7 +1402,6 @@ extern int jbd2_journal_skip_recovery (journal_t *);
> extern void jbd2_journal_update_sb_errno(journal_t *);
> extern int jbd2_journal_update_sb_log_tail (journal_t *, tid_t,
> unsigned long, int);
> -extern void __jbd2_journal_abort_hard (journal_t *);
> extern void jbd2_journal_abort (journal_t *, int);
> extern int jbd2_journal_errno (journal_t *);
> extern void jbd2_journal_ack_err (journal_t *);
> --
> 2.17.2
>
--
Jan Kara <jack@...e.com>
SUSE Labs, CR
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