Merge pull request torvalds#217 from opurdila/virtio-cleanups

virtio cleanups

Author: Octavian Purdila

tools/lkl/Makefile

@@ -48,6 +48,7 @@ ifneq (,$(filter $(OUTPUT_FORMAT),elf64-x86-64 elf32-i386 elf64-x86-64-freebsd e
     LDLIBS   += -lrt -lpthread
   endif
   export CONFIG_AUTO_LKL_POSIX_HOST=y
+  CFLAGS += -DCONFIG_AUTO_LKL_POSIX_HOST
 
   # Intel DPDK configuration
   ifeq ($(dpdk),yes)
@@ -71,6 +72,7 @@ else ifneq (,$(filter $(OUTPUT_FORMAT),pe-i386))
   EXESUF   := .exe
   SOSUF    := .dll
   export CONFIG_AUTO_LKL_NT_HOST=y
+  CFLAGS += -DCONFIG_AUTO_LKL_NT_HOST
 else
   $(error Unrecognized platform: $(OUTPUT_FORMAT))
 endif

tools/lkl/include/lkl_host.h

@@ -19,10 +19,14 @@ int lkl_printf(const char *fmt, ...);
 
 extern char lkl_virtio_devs[256];
 
-struct lkl_dev_buf {
-	void *addr;
-	size_t len;
+#ifdef CONFIG_AUTO_LKL_POSIX_HOST
+#include <sys/uio.h>
+#else
+struct iovec {
+	void *iov_base;
+	size_t iov_len;
 };
+#endif
 
 extern struct lkl_dev_blk_ops lkl_dev_blk_ops;
 
@@ -35,7 +39,7 @@ struct lkl_blk_req {
 	unsigned int type;
 	unsigned int prio;
 	unsigned long long sector;
-	struct lkl_dev_buf *buf;
+	struct iovec *buf;
 	int count;
 };
 
@@ -63,7 +67,7 @@ struct lkl_dev_net_ops {
 	 * @cnt - # of vectors in iov.
 	 * @returns number of bytes transmitted
 	 */
-	int (*tx)(struct lkl_netdev *nd, struct lkl_dev_buf *iov, int cnt);
+	int (*tx)(struct lkl_netdev *nd, struct iovec *iov, int cnt);
 
 	/*
 	 * Reads a packet from the net device.
@@ -78,7 +82,7 @@ struct lkl_dev_net_ops {
 	 * @cnt - # of vectors in iov.
 	 * @returns number of bytes read for success or < 0 if error
 	 */
-	int (*rx)(struct lkl_netdev *nd, struct lkl_dev_buf *iov, int cnt);
+	int (*rx)(struct lkl_netdev *nd, struct iovec *iov, int cnt);
 
 #define LKL_DEV_NET_POLL_RX		1
 #define LKL_DEV_NET_POLL_TX		2

tools/lkl/lib/nt-host.c

@@ -262,31 +262,32 @@ static int blk_request(struct lkl_disk disk, struct lkl_blk_req *req)
 
 		for (i = 0; i < req->count; i++) {
 			DWORD res;
+			struct iovec *buf = &req->buf[i];
 
 			ov.Offset = offset & 0xffffffff;
 			ov.OffsetHigh = offset >> 32;
 
 			if (req->type == LKL_DEV_BLK_TYPE_READ)
-				ret = ReadFile(disk.handle, req->buf[i].addr,
-					       req->buf[i].len, &res, &ov);
+				ret = ReadFile(disk.handle, buf->iov_base,
+					       buf->iov_len, &res, &ov);
 			else
-				ret = WriteFile(disk.handle, req->buf[i].addr,
-						req->buf[i].len, &res, &ov);
+				ret = WriteFile(disk.handle, buf->iov_base,
+						buf->iov_len, &res, &ov);
 			if (!ret) {
 				lkl_printf("%s: I/O error: %d\n", __func__,
 					   GetLastError());
 				err = -1;
 				goto out;
 			}
 
-			if (res != req->buf[i].len) {
+			if (res != buf->iov_len) {
 				lkl_printf("%s: I/O error: short: %d %d\n",
-					   res, req->buf[i].len);
+					   res, buf->iov_len);
 				err = -1;
 				goto out;
 			}
 
-			offset += req->buf[i].len;
+			offset += buf->iov_len;
 		}
 		break;
 	}

tools/lkl/lib/posix-host.c

@@ -336,8 +336,8 @@ static int do_rw(ssize_t (*fn)(), struct lkl_disk disk, struct lkl_blk_req *req)
 
 	for (i = 0; i < req->count; i++) {
 
-		addr = req->buf[i].addr;
-		len = req->buf[i].len;
+		addr = req->buf[i].iov_base;
+		len = req->buf[i].iov_len;
 
 		do {
 			ret = fn(disk.fd, addr, len, off);