fs/ocfs2/buffer_head_io.c

27  * Bits on bh->b_state used by ocfs2.
38 int ocfs2_write_block(struct ocfs2_super *osb, struct buffer_head *bh,
43 	trace_ocfs2_write_block((unsigned long long)bh->b_blocknr, ci);
45 	BUG_ON(bh->b_blocknr < OCFS2_SUPER_BLOCK_BLKNO);
46 	BUG_ON(buffer_jbd(bh));
59 	lock_buffer(bh);
60 	set_buffer_uptodate(bh);
63 	clear_buffer_dirty(bh);
65 	get_bh(bh); /* for end_buffer_write_sync() */
66 	bh->b_end_io = end_buffer_write_sync;
67 	submit_bh(REQ_OP_WRITE, bh);
69 	wait_on_buffer(bh);
71 	if (buffer_uptodate(bh)) {
72 		ocfs2_set_buffer_uptodate(ci, bh);
75 		 * information for this bh as it's not marked locally
94 	struct buffer_head *bh;
116 		bh = bhs[i];
118 		if (buffer_jbd(bh)) {
120 					(unsigned long long)bh->b_blocknr);
124 		if (buffer_dirty(bh)) {
130 			     (unsigned long long)bh->b_blocknr);
134 		lock_buffer(bh);
135 		if (buffer_jbd(bh)) {
140 			     (unsigned long long)bh->b_blocknr);
143 			unlock_buffer(bh);
148 		get_bh(bh); /* for end_buffer_read_sync() */
149 		bh->b_end_io = end_buffer_read_sync;
150 		submit_bh(REQ_OP_READ, bh);
155 		bh = bhs[i - 1];
158 			if (new_bh && bh) {
159 				/* If middle bh fails, let previous bh
161 				 * avoid bh leak
163 				if (!buffer_jbd(bh))
164 					wait_on_buffer(bh);
165 				put_bh(bh);
167 			} else if (bh && buffer_uptodate(bh)) {
168 				clear_buffer_uptodate(bh);
174 		if (!buffer_jbd(bh))
175 			wait_on_buffer(bh);
177 		if (!buffer_uptodate(bh)) {
196 				      struct buffer_head *bh))
200 	struct buffer_head *bh;
240 				/* Don't forget to put previous bh! */
244 		bh = bhs[i];
271 		if (!ignore_cache && !ocfs2_buffer_uptodate(ci, bh)) {
273 			     (unsigned long long)bh->b_blocknr,
280 		trace_ocfs2_read_blocks_bh((unsigned long long)bh->b_blocknr,
281 			ignore_cache, buffer_jbd(bh), buffer_dirty(bh));
283 		if (buffer_jbd(bh)) {
288 			if (buffer_dirty(bh)) {
299 			    && ocfs2_buffer_read_ahead(ci, bh))
302 			lock_buffer(bh);
303 			if (buffer_jbd(bh)) {
307 				     (unsigned long long)bh->b_blocknr);
310 				unlock_buffer(bh);
321 			    && ocfs2_buffer_uptodate(ci, bh)) {
322 				unlock_buffer(bh);
326 			get_bh(bh); /* for end_buffer_read_sync() */
328 				set_buffer_needs_validate(bh);
329 			bh->b_end_io = end_buffer_read_sync;
330 			submit_bh(REQ_OP_READ, bh);
337 		bh = bhs[i];
344 				if (new_bh && bh) {
345 					/* If middle bh fails, let previous bh
347 					 * avoid bh leak
349 					if (!buffer_jbd(bh))
350 						wait_on_buffer(bh);
351 					put_bh(bh);
353 				} else if (bh && buffer_uptodate(bh)) {
354 					clear_buffer_uptodate(bh);
359 			 * owner sem. Avoid doing any work on the bh if the
361 			if (!buffer_jbd(bh))
362 				wait_on_buffer(bh);
364 			if (!buffer_uptodate(bh)) {
369 				 * for this bh as it's not marked locally
372 				clear_buffer_needs_validate(bh);
376 			if (buffer_needs_validate(bh)) {
380 				BUG_ON(buffer_jbd(bh));
381 				clear_buffer_needs_validate(bh);
382 				status = validate(sb, bh);
391 		if (bh)
392 			ocfs2_set_buffer_uptodate(ci, bh);
429 				struct buffer_head *bh)
432 	struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
434 	BUG_ON(buffer_jbd(bh));
435 	ocfs2_check_super_or_backup(osb->sb, bh->b_blocknr);
443 	lock_buffer(bh);
444 	set_buffer_uptodate(bh);
447 	clear_buffer_dirty(bh);
449 	get_bh(bh); /* for end_buffer_write_sync() */
450 	bh->b_end_io = end_buffer_write_sync;
451 	ocfs2_compute_meta_ecc(osb->sb, bh->b_data, &di->i_check);
452 	submit_bh(REQ_OP_WRITE, bh);
454 	wait_on_buffer(bh);
456 	if (!buffer_uptodate(bh)) {