32 static void journal_end_buffer_io_sync(struct buffer_head *bh, int uptodate)  in journal_end_buffer_io_sync()  argument
34 	struct buffer_head *orig_bh = bh->b_private;  in journal_end_buffer_io_sync()
36 	BUFFER_TRACE(bh, "");  in journal_end_buffer_io_sync()
38 		set_buffer_uptodate(bh);  in journal_end_buffer_io_sync()
40 		clear_buffer_uptodate(bh);  in journal_end_buffer_io_sync()
46 	unlock_buffer(bh);  in journal_end_buffer_io_sync()
63 static void release_buffer_page(struct buffer_head *bh)  in release_buffer_page()  argument
67 	if (buffer_dirty(bh))  in release_buffer_page()
69 	if (atomic_read(&bh->b_count) != 1)  in release_buffer_page()
71 	page = bh->b_page;  in release_buffer_page()
82 	__brelse(bh);  in release_buffer_page()
89 	__brelse(bh);  in release_buffer_page()
92 static void jbd2_commit_block_csum_set(journal_t *j, struct buffer_head *bh)  in jbd2_commit_block_csum_set()  argument
100 	h = (struct commit_header *)(bh->b_data);  in jbd2_commit_block_csum_set()
104 	csum = jbd2_chksum(j, j->j_csum_seed, bh->b_data, j->j_blocksize);  in jbd2_commit_block_csum_set()
122 	struct buffer_head *bh;  in journal_submit_commit_record()  local
131 	bh = jbd2_journal_get_descriptor_buffer(commit_transaction,  in journal_submit_commit_record()
133 	if (!bh)  in journal_submit_commit_record()
136 	tmp = (struct commit_header *)bh->b_data;  in journal_submit_commit_record()
146 	jbd2_commit_block_csum_set(journal, bh);  in journal_submit_commit_record()
148 	BUFFER_TRACE(bh, "submit commit block");  in journal_submit_commit_record()
149 	lock_buffer(bh);  in journal_submit_commit_record()
150 	clear_buffer_dirty(bh);  in journal_submit_commit_record()
151 	set_buffer_uptodate(bh);  in journal_submit_commit_record()
152 	bh->b_end_io = journal_end_buffer_io_sync;  in journal_submit_commit_record()
157 			REQ_SYNC | REQ_PREFLUSH | REQ_FUA, bh);  in journal_submit_commit_record()
159 		ret = submit_bh(REQ_OP_WRITE, REQ_SYNC, bh);  in journal_submit_commit_record()
161 	*cbh = bh;  in journal_submit_commit_record()
170 					 struct buffer_head *bh)  in journal_wait_on_commit_record()  argument
174 	clear_buffer_dirty(bh);  in journal_wait_on_commit_record()
175 	wait_on_buffer(bh);  in journal_wait_on_commit_record()
177 	if (unlikely(!buffer_uptodate(bh)))  in journal_wait_on_commit_record()
179 	put_bh(bh);            /* One for getblk() */  in journal_wait_on_commit_record()
329 static __u32 jbd2_checksum_data(__u32 crc32_sum, struct buffer_head *bh)  in jbd2_checksum_data()  argument
331 	struct page *page = bh->b_page;  in jbd2_checksum_data()
337 		(void *)(addr + offset_in_page(bh->b_data)), bh->b_size);  in jbd2_checksum_data()
352 				    struct buffer_head *bh, __u32 sequence)  in jbd2_block_tag_csum_set()  argument
355 	struct page *page = bh->b_page;  in jbd2_block_tag_csum_set()
366 	csum32 = jbd2_chksum(j, csum32, addr + offset_in_page(bh->b_data),  in jbd2_block_tag_csum_set()
367 			     bh->b_size);  in jbd2_block_tag_csum_set()
534 			struct buffer_head *bh = jh2bh(jh);  in jbd2_journal_commit_transaction()  local
537 			jbd2_free(jh->b_committed_data, bh->b_size);  in jbd2_journal_commit_transaction()
764 				struct buffer_head *bh = wbuf[i];  in jbd2_journal_commit_transaction()  local
770 					    jbd2_checksum_data(crc32_sum, bh);  in jbd2_journal_commit_transaction()
773 				lock_buffer(bh);  in jbd2_journal_commit_transaction()
774 				clear_buffer_dirty(bh);  in jbd2_journal_commit_transaction()
775 				set_buffer_uptodate(bh);  in jbd2_journal_commit_transaction()
776 				bh->b_end_io = journal_end_buffer_io_sync;  in jbd2_journal_commit_transaction()
777 				submit_bh(REQ_OP_WRITE, REQ_SYNC, bh);  in jbd2_journal_commit_transaction()
856 		struct buffer_head *bh = list_entry(io_bufs.prev,  in jbd2_journal_commit_transaction()  local
860 		wait_on_buffer(bh);  in jbd2_journal_commit_transaction()
863 		if (unlikely(!buffer_uptodate(bh)))  in jbd2_journal_commit_transaction()
865 		jbd2_unfile_log_bh(bh);  in jbd2_journal_commit_transaction()
872 		BUFFER_TRACE(bh, "dumping temporary bh");  in jbd2_journal_commit_transaction()
873 		__brelse(bh);  in jbd2_journal_commit_transaction()
874 		J_ASSERT_BH(bh, atomic_read(&bh->b_count) == 0);  in jbd2_journal_commit_transaction()
875 		free_buffer_head(bh);  in jbd2_journal_commit_transaction()
879 		bh = jh2bh(jh);  in jbd2_journal_commit_transaction()
880 		clear_buffer_jwrite(bh);  in jbd2_journal_commit_transaction()
881 		J_ASSERT_BH(bh, buffer_jbddirty(bh));  in jbd2_journal_commit_transaction()
882 		J_ASSERT_BH(bh, !buffer_shadow(bh));  in jbd2_journal_commit_transaction()
891 		__brelse(bh);  in jbd2_journal_commit_transaction()
900 		struct buffer_head *bh;  in jbd2_journal_commit_transaction()  local
902 		bh = list_entry(log_bufs.prev, struct buffer_head, b_assoc_buffers);  in jbd2_journal_commit_transaction()
903 		wait_on_buffer(bh);  in jbd2_journal_commit_transaction()
906 		if (unlikely(!buffer_uptodate(bh)))  in jbd2_journal_commit_transaction()
909 		BUFFER_TRACE(bh, "ph5: control buffer writeout done: unfile");  in jbd2_journal_commit_transaction()
910 		clear_buffer_jwrite(bh);  in jbd2_journal_commit_transaction()
911 		jbd2_unfile_log_bh(bh);  in jbd2_journal_commit_transaction()
913 		__brelse(bh);		/* One for getblk */  in jbd2_journal_commit_transaction()
974 		struct buffer_head *bh;  in jbd2_journal_commit_transaction()  local
980 		bh = jh2bh(jh);  in jbd2_journal_commit_transaction()
985 		get_bh(bh);  in jbd2_journal_commit_transaction()
1003 			jbd2_free(jh->b_committed_data, bh->b_size);  in jbd2_journal_commit_transaction()
1011 			jbd2_free(jh->b_frozen_data, bh->b_size);  in jbd2_journal_commit_transaction()
1039 		if (buffer_freed(bh) && !jh->b_next_transaction) {  in jbd2_journal_commit_transaction()
1042 			clear_buffer_freed(bh);  in jbd2_journal_commit_transaction()
1043 			clear_buffer_jbddirty(bh);  in jbd2_journal_commit_transaction()
1057 			mapping = READ_ONCE(bh->b_page->mapping);  in jbd2_journal_commit_transaction()
1059 				clear_buffer_mapped(bh);  in jbd2_journal_commit_transaction()
1060 				clear_buffer_new(bh);  in jbd2_journal_commit_transaction()
1061 				clear_buffer_req(bh);  in jbd2_journal_commit_transaction()
1062 				bh->b_bdev = NULL;  in jbd2_journal_commit_transaction()
1066 		if (buffer_jbddirty(bh)) {  in jbd2_journal_commit_transaction()
1070 				clear_buffer_jbddirty(bh);  in jbd2_journal_commit_transaction()
1072 			J_ASSERT_BH(bh, !buffer_dirty(bh));  in jbd2_journal_commit_transaction()
1091 			release_buffer_page(bh);	/* Drops bh reference */  in jbd2_journal_commit_transaction()
1093 			__brelse(bh);  in jbd2_journal_commit_transaction()