bsd/vfs/vfs_bio.c

684         buf_t	io_bp;
699 	io_bp = alloc_io_buf(bp->b_vp, 0);
701 	io_bp->b_flags = bp->b_flags & (B_COMMIT_UPL | B_META | B_PAGEIO | B_CLUSTER | B_PHYS | B_RAW | B_ASYNC | B_READ | B_FUA);
704 	        io_bp->b_transaction = arg;
705 		io_bp->b_iodone = iodone;
706 		io_bp->b_flags |= B_CALL;
709 	        io_bp->b_upl = bp->b_upl;
710 		io_bp->b_uploffset = bp->b_uploffset + io_offset;
712 	        io_bp->b_datap  = (uintptr_t)(((char *)bp->b_datap) + io_offset);
714 	io_bp->b_bcount = io_size;
716 	return (io_bp);
745         buf_t	io_bp;
758 	io_bp = alloc_io_buf(bp->b_vp, priv);
760 	io_bp->b_flags = bp->b_flags & (B_META | B_ZALLOC | B_ASYNC | B_READ | B_FUA);
761 	io_bp->b_blkno = bp->b_blkno;
762 	io_bp->b_lblkno = bp->b_lblkno;
765 	        io_bp->b_transaction = arg;
766 		io_bp->b_iodone = iodone;
767 		io_bp->b_flags |= B_CALL;
770 		io_bp->b_bcount = bp->b_bcount;
771 		io_bp->b_bufsize = bp->b_bufsize;
774 			io_bp->b_datap = external_storage;
776 			io_bp->b_data_store = NULL;
779 			io_bp->b_datap = bp->b_datap;
781 			io_bp->b_data_store = bp;
784 		*(buf_t *)(&io_bp->b_orig) = bp;
788 		io_bp->b_lflags |= BL_SHADOW;
789 		io_bp->b_shadow = bp->b_shadow;
790 		bp->b_shadow = io_bp;
795 			io_bp->b_lflags |= BL_EXTERNAL;
803 			io_bp->b_lflags |= BL_EXTERNAL;
805 			io_bp->b_bcount = bp->b_bcount;
806 			io_bp->b_bufsize = bp->b_bufsize;
807 			io_bp->b_datap = external_storage;
809 			allocbuf(io_bp, bp->b_bcount);
811 			io_bp->b_lflags |= BL_IOBUF_ALLOC;
813 		bcopy((caddr_t)bp->b_datap, (caddr_t)io_bp->b_datap, bp->b_bcount);
816 		io_bp->b_data_store = NULL;
819 	KERNEL_DEBUG(0xbbbbc000 | DBG_FUNC_END, bp, bp->b_shadow_ref, 0, io_bp, 0);
821 	return (io_bp);
1094 	buf_t	io_bp;			 /* For reading or writing a single block */
1117 	io_bp = alloc_io_buf(devvp, 0);
1119 	io_bp->b_lblkno = bp->b_lblkno;
1120 	io_bp->b_datap  = bp->b_datap;
1135 		        bzero((caddr_t)io_bp->b_datap, (int)io_contig_bytes);
1137 		        io_bp->b_bcount	 = io_contig_bytes;
1138 			io_bp->b_bufsize = io_contig_bytes;
1139 			io_bp->b_resid   = io_contig_bytes;
1140 			io_bp->b_blkno   = io_blkno;
1142 			buf_reset(io_bp, io_direction);
1151 			if ((error = VNOP_STRATEGY(io_bp)))
1153 			if ((error = (int)buf_biowait(io_bp)))
1155 			if (io_bp->b_resid) {
1156 			        io_resid -= (io_contig_bytes - io_bp->b_resid);
1163 		io_bp->b_datap += io_contig_bytes;
1171 	buf_free(io_bp);