bsd/vfs/vfs_bio.c

718         buf_t	io_bp;
733 	io_bp = alloc_io_buf(bp->b_vp, 0);
735 	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);
738 	        io_bp->b_transaction = arg;
739 		io_bp->b_iodone = iodone;
740 		io_bp->b_flags |= B_CALL;
743 	        io_bp->b_upl = bp->b_upl;
744 		io_bp->b_uploffset = bp->b_uploffset + io_offset;
746 	        io_bp->b_datap  = (uintptr_t)(((char *)bp->b_datap) + io_offset);
748 	io_bp->b_bcount = io_size;
750 	return (io_bp);
779         buf_t	io_bp;
792 	io_bp = alloc_io_buf(bp->b_vp, priv);
794 	io_bp->b_flags = bp->b_flags & (B_META | B_ZALLOC | B_ASYNC | B_READ | B_FUA);
795 	io_bp->b_blkno = bp->b_blkno;
796 	io_bp->b_lblkno = bp->b_lblkno;
799 	        io_bp->b_transaction = arg;
800 		io_bp->b_iodone = iodone;
801 		io_bp->b_flags |= B_CALL;
804 		io_bp->b_bcount = bp->b_bcount;
805 		io_bp->b_bufsize = bp->b_bufsize;
808 			io_bp->b_datap = external_storage;
810 			io_bp->b_data_store = NULL;
813 			io_bp->b_datap = bp->b_datap;
815 			io_bp->b_data_store = bp;
818 		*(buf_t *)(&io_bp->b_orig) = bp;
822 		io_bp->b_lflags |= BL_SHADOW;
823 		io_bp->b_shadow = bp->b_shadow;
824 		bp->b_shadow = io_bp;
829 			io_bp->b_lflags |= BL_EXTERNAL;
837 			io_bp->b_lflags |= BL_EXTERNAL;
839 			io_bp->b_bcount = bp->b_bcount;
840 			io_bp->b_bufsize = bp->b_bufsize;
841 			io_bp->b_datap = external_storage;
843 			allocbuf(io_bp, bp->b_bcount);
845 			io_bp->b_lflags |= BL_IOBUF_ALLOC;
847 		bcopy((caddr_t)bp->b_datap, (caddr_t)io_bp->b_datap, bp->b_bcount);
850 		io_bp->b_data_store = NULL;
853 	KERNEL_DEBUG(0xbbbbc000 | DBG_FUNC_END, bp, bp->b_shadow_ref, 0, io_bp, 0);
855 	return (io_bp);
1128 	buf_t	io_bp;			 /* For reading or writing a single block */
1151 	io_bp = alloc_io_buf(devvp, 0);
1153 	io_bp->b_lblkno = bp->b_lblkno;
1154 	io_bp->b_datap  = bp->b_datap;
1169 		        bzero((caddr_t)io_bp->b_datap, (int)io_contig_bytes);
1171 		        io_bp->b_bcount	 = io_contig_bytes;
1172 			io_bp->b_bufsize = io_contig_bytes;
1173 			io_bp->b_resid   = io_contig_bytes;
1174 			io_bp->b_blkno   = io_blkno;
1176 			buf_reset(io_bp, io_direction);
1185 			if ((error = VNOP_STRATEGY(io_bp)))
1187 			if ((error = (int)buf_biowait(io_bp)))
1189 			if (io_bp->b_resid) {
1190 			        io_resid -= (io_contig_bytes - io_bp->b_resid);
1197 		io_bp->b_datap += io_contig_bytes;
1205 	buf_free(io_bp);