fs/jbd2/checkpoint.c

30 static inline void __buffer_unlink(struct journal_head *jh)
32 	transaction_t *transaction = jh->b_cp_transaction;
34 	jh->b_cpnext->b_cpprev = jh->b_cpprev;
35 	jh->b_cpprev->b_cpnext = jh->b_cpnext;
36 	if (transaction->t_checkpoint_list == jh) {
37 		transaction->t_checkpoint_list = jh->b_cpnext;
38 		if (transaction->t_checkpoint_list == jh)
150 	struct journal_head	*jh;
192 		jh = transaction->t_checkpoint_list;
193 		bh = jh2bh(jh);
195 		if (jh->b_transaction != NULL) {
196 			transaction_t *t = jh->b_transaction;
250 			if (__jbd2_journal_remove_checkpoint(jh) ||
267 			transaction->t_checkpoint_list = jh->b_cpnext;
352 static unsigned long journal_shrink_one_cp_list(struct journal_head *jh,
357 	struct journal_head *next_jh = jh;
362 	if (!jh)
365 	last_jh = jh->b_cpprev;
367 		jh = next_jh;
368 		next_jh = jh->b_cpnext;
371 			ret = __jbd2_journal_remove_checkpoint(jh);
373 			ret = jbd2_journal_try_remove_checkpoint(jh);
389 	} while (jh != last_jh);
550  * The function can free jh and bh.
554 int __jbd2_journal_remove_checkpoint(struct journal_head *jh)
560 	JBUFFER_TRACE(jh, "entry");
562 	transaction = jh->b_cp_transaction;
564 		JBUFFER_TRACE(jh, "not on transaction");
569 	JBUFFER_TRACE(jh, "removing from transaction");
571 	__buffer_unlink(jh);
572 	jh->b_cp_transaction = NULL;
574 	jbd2_journal_put_journal_head(jh);
615 int jbd2_journal_try_remove_checkpoint(struct journal_head *jh)
617 	struct buffer_head *bh = jh2bh(jh);
619 	if (jh->b_transaction)
634 	JBUFFER_TRACE(jh, "remove from checkpoint list");
635 	return __jbd2_journal_remove_checkpoint(jh);
646 void __jbd2_journal_insert_checkpoint(struct journal_head *jh,
649 	JBUFFER_TRACE(jh, "entry");
650 	J_ASSERT_JH(jh, buffer_dirty(jh2bh(jh)) || buffer_jbddirty(jh2bh(jh)));
651 	J_ASSERT_JH(jh, jh->b_cp_transaction == NULL);
654 	jbd2_journal_grab_journal_head(jh2bh(jh));
655 	jh->b_cp_transaction = transaction;
658 		jh->b_cpnext = jh->b_cpprev = jh;
660 		jh->b_cpnext = transaction->t_checkpoint_list;
661 		jh->b_cpprev = transaction->t_checkpoint_list->b_cpprev;
662 		jh->b_cpprev->b_cpnext = jh;
663 		jh->b_cpnext->b_cpprev = jh;
665 	transaction->t_checkpoint_list = jh;