271 static int start_this_handle(journal_t *journal, handle_t *handle,  in start_this_handle()  argument
275 	int		blocks = handle->h_buffer_credits;  in start_this_handle()
279 	if (handle->h_rsv_handle)  in start_this_handle()
280 		rsv_blocks = handle->h_rsv_handle->h_buffer_credits;  in start_this_handle()
311 	jbd_debug(3, "New handle %p going live.\n", handle);  in start_this_handle()
332 	if (!handle->h_reserved && journal->j_barrier_count) {  in start_this_handle()
345 		    (handle->h_reserved || !journal->j_barrier_count)) {  in start_this_handle()
355 	if (!handle->h_reserved) {  in start_this_handle()
366 		handle->h_reserved = 0;  in start_this_handle()
373 	handle->h_transaction = transaction;  in start_this_handle()
374 	handle->h_requested_credits = blocks;  in start_this_handle()
375 	handle->h_start_jiffies = jiffies;  in start_this_handle()
379 		  handle, blocks,  in start_this_handle()
383 	current->journal_info = handle;  in start_this_handle()
385 	lock_map_acquire(&handle->h_lockdep_map);  in start_this_handle()
395 	handle_t *handle = jbd2_alloc_handle(GFP_NOFS);  in new_handle()  local
396 	if (!handle)  in new_handle()
398 	handle->h_buffer_credits = nblocks;  in new_handle()
399 	handle->h_ref = 1;  in new_handle()
401 	lockdep_init_map(&handle->h_lockdep_map, "jbd2_handle",  in new_handle()
404 	return handle;  in new_handle()
430 	handle_t *handle = journal_current_handle();  in jbd2__journal_start()  local
436 	if (handle) {  in jbd2__journal_start()
437 		J_ASSERT(handle->h_transaction->t_journal == journal);  in jbd2__journal_start()
438 		handle->h_ref++;  in jbd2__journal_start()
439 		return handle;  in jbd2__journal_start()
442 	handle = new_handle(nblocks);  in jbd2__journal_start()
443 	if (!handle)  in jbd2__journal_start()
450 			jbd2_free_handle(handle);  in jbd2__journal_start()
455 		handle->h_rsv_handle = rsv_handle;  in jbd2__journal_start()
458 	err = start_this_handle(journal, handle, gfp_mask);  in jbd2__journal_start()
460 		if (handle->h_rsv_handle)  in jbd2__journal_start()
461 			jbd2_free_handle(handle->h_rsv_handle);  in jbd2__journal_start()
462 		jbd2_free_handle(handle);  in jbd2__journal_start()
465 	handle->h_type = type;  in jbd2__journal_start()
466 	handle->h_line_no = line_no;  in jbd2__journal_start()
468 				handle->h_transaction->t_tid, type,  in jbd2__journal_start()
470 	return handle;  in jbd2__journal_start()
481 void jbd2_journal_free_reserved(handle_t *handle)  in jbd2_journal_free_reserved()  argument
483 	journal_t *journal = handle->h_journal;  in jbd2_journal_free_reserved()
485 	WARN_ON(!handle->h_reserved);  in jbd2_journal_free_reserved()
486 	sub_reserved_credits(journal, handle->h_buffer_credits);  in jbd2_journal_free_reserved()
487 	jbd2_free_handle(handle);  in jbd2_journal_free_reserved()
503 int jbd2_journal_start_reserved(handle_t *handle, unsigned int type,  in jbd2_journal_start_reserved()  argument
506 	journal_t *journal = handle->h_journal;  in jbd2_journal_start_reserved()
509 	if (WARN_ON(!handle->h_reserved)) {  in jbd2_journal_start_reserved()
511 		jbd2_journal_stop(handle);  in jbd2_journal_start_reserved()
519 		jbd2_journal_free_reserved(handle);  in jbd2_journal_start_reserved()
523 	handle->h_journal = NULL;  in jbd2_journal_start_reserved()
528 	ret = start_this_handle(journal, handle, GFP_NOFS);  in jbd2_journal_start_reserved()
530 		jbd2_journal_free_reserved(handle);  in jbd2_journal_start_reserved()
533 	handle->h_type = type;  in jbd2_journal_start_reserved()
534 	handle->h_line_no = line_no;  in jbd2_journal_start_reserved()
559 int jbd2_journal_extend(handle_t *handle, int nblocks)  in jbd2_journal_extend()  argument
561 	transaction_t *transaction = handle->h_transaction;  in jbd2_journal_extend()
566 	if (is_handle_aborted(handle))  in jbd2_journal_extend()
577 			  "transaction not running\n", handle, nblocks);  in jbd2_journal_extend()
587 			  "transaction too large\n", handle, nblocks);  in jbd2_journal_extend()
595 			  "insufficient log space\n", handle, nblocks);  in jbd2_journal_extend()
602 				 handle->h_type, handle->h_line_no,  in jbd2_journal_extend()
603 				 handle->h_buffer_credits,  in jbd2_journal_extend()
606 	handle->h_buffer_credits += nblocks;  in jbd2_journal_extend()
607 	handle->h_requested_credits += nblocks;  in jbd2_journal_extend()
610 	jbd_debug(3, "extended handle %p by %d\n", handle, nblocks);  in jbd2_journal_extend()
634 int jbd2__journal_restart(handle_t *handle, int nblocks, gfp_t gfp_mask)  in jbd2__journal_restart()  argument
636 	transaction_t *transaction = handle->h_transaction;  in jbd2__journal_restart()
643 	if (is_handle_aborted(handle))  in jbd2__journal_restart()
652 	J_ASSERT(journal_current_handle() == handle);  in jbd2__journal_restart()
656 	atomic_sub(handle->h_buffer_credits,  in jbd2__journal_restart()
658 	if (handle->h_rsv_handle) {  in jbd2__journal_restart()
660 				     handle->h_rsv_handle->h_buffer_credits);  in jbd2__journal_restart()
666 	handle->h_transaction = NULL;  in jbd2__journal_restart()
669 	jbd_debug(2, "restarting handle %p\n", handle);  in jbd2__journal_restart()
675 	lock_map_release(&handle->h_lockdep_map);  in jbd2__journal_restart()
676 	handle->h_buffer_credits = nblocks;  in jbd2__journal_restart()
677 	ret = start_this_handle(journal, handle, gfp_mask);  in jbd2__journal_restart()
683 int jbd2_journal_restart(handle_t *handle, int nblocks)  in jbd2_journal_restart()  argument
685 	return jbd2__journal_restart(handle, nblocks, GFP_NOFS);  in jbd2_journal_restart()
811 do_get_write_access(handle_t *handle, struct journal_head *jh,  in do_get_write_access()  argument
815 	transaction_t *transaction = handle->h_transaction;  in do_get_write_access()
821 	if (is_handle_aborted(handle))  in do_get_write_access()
884 	if (is_handle_aborted(handle)) {  in do_get_write_access()
1001 	jbd2_journal_cancel_revoke(handle, jh);  in do_get_write_access()
1012 static bool jbd2_write_access_granted(handle_t *handle, struct buffer_head *bh,  in jbd2_write_access_granted()  argument
1043 	if (jh->b_transaction != handle->h_transaction &&  in jbd2_write_access_granted()
1044 	    jh->b_next_transaction != handle->h_transaction)  in jbd2_write_access_granted()
1075 int jbd2_journal_get_write_access(handle_t *handle, struct buffer_head *bh)  in jbd2_journal_get_write_access()  argument
1080 	if (jbd2_write_access_granted(handle, bh, false))  in jbd2_journal_get_write_access()
1087 	rc = do_get_write_access(handle, jh, 0);  in jbd2_journal_get_write_access()
1112 int jbd2_journal_get_create_access(handle_t *handle, struct buffer_head *bh)  in jbd2_journal_get_create_access()  argument
1114 	transaction_t *transaction = handle->h_transaction;  in jbd2_journal_get_create_access()
1121 	if (is_handle_aborted(handle))  in jbd2_journal_get_create_access()
1178 	jbd2_journal_cancel_revoke(handle, jh);  in jbd2_journal_get_create_access()
1210 int jbd2_journal_get_undo_access(handle_t *handle, struct buffer_head *bh)  in jbd2_journal_get_undo_access()  argument
1217 	if (jbd2_write_access_granted(handle, bh, true))  in jbd2_journal_get_undo_access()
1226 	err = do_get_write_access(handle, jh, 1);  in jbd2_journal_get_undo_access()
1328 int jbd2_journal_dirty_metadata(handle_t *handle, struct buffer_head *bh)  in jbd2_journal_dirty_metadata()  argument
1330 	transaction_t *transaction = handle->h_transaction;  in jbd2_journal_dirty_metadata()
1335 	if (is_handle_aborted(handle))  in jbd2_journal_dirty_metadata()
1384 		if (handle->h_buffer_credits <= 0) {  in jbd2_journal_dirty_metadata()
1388 		handle->h_buffer_credits--;  in jbd2_journal_dirty_metadata()
1484 int jbd2_journal_forget (handle_t *handle, struct buffer_head *bh)  in jbd2_journal_forget()  argument
1486 	transaction_t *transaction = handle->h_transaction;  in jbd2_journal_forget()
1493 	if (is_handle_aborted(handle))  in jbd2_journal_forget()
1596 		handle->h_buffer_credits++;  in jbd2_journal_forget()
1617 int jbd2_journal_stop(handle_t *handle)  in jbd2_journal_stop()  argument
1619 	transaction_t *transaction = handle->h_transaction;  in jbd2_journal_stop()
1631 		if (--handle->h_ref > 0) {  in jbd2_journal_stop()
1632 			jbd_debug(4, "h_ref %d -> %d\n", handle->h_ref + 1,  in jbd2_journal_stop()
1633 							 handle->h_ref);  in jbd2_journal_stop()
1636 			if (handle->h_rsv_handle)  in jbd2_journal_stop()
1637 				jbd2_free_handle(handle->h_rsv_handle);  in jbd2_journal_stop()
1643 	J_ASSERT(journal_current_handle() == handle);  in jbd2_journal_stop()
1645 	if (is_handle_aborted(handle))  in jbd2_journal_stop()
1650 	if (--handle->h_ref > 0) {  in jbd2_journal_stop()
1651 		jbd_debug(4, "h_ref %d -> %d\n", handle->h_ref + 1,  in jbd2_journal_stop()
1652 			  handle->h_ref);  in jbd2_journal_stop()
1656 	jbd_debug(4, "Handle %p going down\n", handle);  in jbd2_journal_stop()
1659 				handle->h_type, handle->h_line_no,  in jbd2_journal_stop()
1660 				jiffies - handle->h_start_jiffies,  in jbd2_journal_stop()
1661 				handle->h_sync, handle->h_requested_credits,  in jbd2_journal_stop()
1662 				(handle->h_requested_credits -  in jbd2_journal_stop()
1663 				 handle->h_buffer_credits));  in jbd2_journal_stop()
1695 	if (handle->h_sync && journal->j_last_sync_writer != pid &&  in jbd2_journal_stop()
1721 	if (handle->h_sync)  in jbd2_journal_stop()
1724 	atomic_sub(handle->h_buffer_credits,  in jbd2_journal_stop()
1733 	if (handle->h_sync ||  in jbd2_journal_stop()
1742 					"handle %p\n", handle);  in jbd2_journal_stop()
1750 		if (handle->h_sync && !(current->flags & PF_MEMALLOC))  in jbd2_journal_stop()
1770 	lock_map_release(&handle->h_lockdep_map);  in jbd2_journal_stop()
1772 	if (handle->h_rsv_handle)  in jbd2_journal_stop()
1773 		jbd2_journal_free_reserved(handle->h_rsv_handle);  in jbd2_journal_stop()
1775 	jbd2_free_handle(handle);  in jbd2_journal_stop()
2479 int jbd2_journal_file_inode(handle_t *handle, struct jbd2_inode *jinode)  in jbd2_journal_file_inode()  argument
2481 	transaction_t *transaction = handle->h_transaction;  in jbd2_journal_file_inode()
2484 	if (is_handle_aborted(handle))  in jbd2_journal_file_inode()