bsd/hfs/hfs_btreeio.c

54 static int btree_journal_modify_block_end(struct hfsmount *hfsmp, struct buf *bp);
56 void btree_swap_node(struct buf *bp, __unused void *arg);
99     struct buf   *bp = NULL;
116         bp = buf_getblk(vp, (daddr64_t)blockNum, block->blockSize, 0, 0, BLK_META);
117         if (bp &&
119             buf_setblkno(bp, blkno);
122         retval = buf_meta_bread(vp, (daddr64_t)blockNum, block->blockSize, NOCRED, &bp);
124     if (bp == NULL)
128         block->blockHeader = bp;
129         block->buffer = (char *)buf_dataptr(bp);
130     	block->blockNum = buf_lblkno(bp);
131         block->blockReadFromDisk = (buf_fromcache(bp) == 0);	/* not found in cache ==> came from disk */
140                 (((BTHeaderRec *)((char *)block->buffer + 14))->nodeSize != buf_count(bp)) &&
141                 (SWAP_BE16 (((BTHeaderRec *)((char *)block->buffer + 14))->nodeSize) != buf_count(bp))) {
174 				buf_markinvalid(bp);
179     	if (bp)
180 			buf_brelse(bp);
192     struct buf *bp = NULL;
198     bp = (struct buf *) blockPtr->blockHeader;
199     if (bp == NULL) {
200 		panic("hfs: ModifyBlockStart: null bp  for blockdescptr %p?!?\n", blockPtr);
204 	journal_modify_block_start(hfsmp->jnl, bp);
209 btree_swap_node(struct buf *bp, __unused void *arg)
213     struct vnode *vp = buf_vnode(bp);
217     block.blockHeader = bp;
218     block.buffer = (char *)buf_dataptr(bp);
219     block.blockNum = buf_lblkno(bp);
221     block.blockReadFromDisk = (buf_fromcache(bp) == 0);
222     block.blockSize = buf_count(bp);
235 btree_journal_modify_block_end(struct hfsmount *hfsmp, struct buf *bp)
237     return journal_modify_block_end(hfsmp->jnl, bp, btree_swap_node, hfsmp);
245     struct buf *bp = NULL;
247     bp = (struct buf *) blockPtr->blockHeader;
249     if (bp == NULL) {
255                 buf_markinvalid(bp);
257 		if (hfsmp->jnl && (buf_flags(bp) & B_LOCKED)) {
258 			journal_kill_block(hfsmp->jnl, bp);
260 			buf_brelse(bp);	/* note: B-tree code will clear blockPtr->blockHeader and blockPtr->buffer */
263 		/* Don't let anyone else try to use this bp, it's been consumed */
270 					panic("hfs: releaseblock: modified is 0 but forcewrite set! bp %p\n", bp);
273 				retval = btree_journal_modify_block_end(hfsmp, bp);
276 				retval = VNOP_BWRITE(bp);
279 			/* Don't let anyone else try to use this bp, it's been consumed */
300 		buf_setflags(bp, B_LOCKED);
310 					panic("hfs: releaseblock: modified is 0 but markdirty set! bp %p\n", bp);
312 				retval = btree_journal_modify_block_end(hfsmp, bp);
314 			} else if (bdwrite_internal(bp, 1) != 0) {
319                 buf_clearflags(bp, B_LOCKED);
320                 buf_bawrite(bp);
323             /* Don't let anyone else try to use this bp, it's been consumed */
335 				//    journal_modify_block_abort(hfsmp->jnl, bp);
336 				//panic("hfs: releaseblock called for 0x%x but mod_block_start previously called.\n", bp);
337 				btree_journal_modify_block_end(hfsmp, bp);
340 				buf_brelse(bp);	/* note: B-tree code will clear blockPtr->blockHeader and blockPtr->buffer */
343 			/* Don't let anyone else try to use this bp, it's been consumed */
555 	struct buf *bp = NULL;
563 		bp = buf_getblk(vp, blk, blksize, 0, 0, BLK_META);
564 		if (bp == NULL)
571 		    //journal_modify_block_start(hfsmp->jnl, bp);
573 		bzero((char *)buf_dataptr(bp), blksize);
575 		buf_markaged(bp);
581 			//journal_modify_block_end(hfsmp->jnl, bp);
586 			    VNOP_BWRITE(bp);
588 			    buf_bawrite(bp);
592 				VNOP_BWRITE(bp);
594 				buf_bawrite(bp);
622 	struct buf *bp = NULL;
748 	bp = buf_getblk(vp, 0, nodesize, 0, 0, BLK_META);
749 	if (bp == NULL) {
754 	buffer = (void *)buf_dataptr(bp);
756 	blkdesc.blockHeader = (void *)bp;
762 	if (buf_size(bp) != nodesize)
763 		panic("hfs_create_attr_btree: bad buffer size (%d)\n", buf_size(bp));
812 		result = btree_journal_modify_block_end(hfsmp, bp);
814 		result = VNOP_BWRITE(bp);
821 		bp = buf_getblk(vp, node_num, nodesize, 0, 0, BLK_META);
822 		if (bp == NULL) {
826 		buffer = (void *)buf_dataptr(bp);
828 		blkdesc.blockHeader = (void *)bp;
853 			result = btree_journal_modify_block_end(hfsmp, bp);
855 			result = VNOP_BWRITE(bp);