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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Minios-devel] [UNIKRAFT PATCH 2/8] lib/uk9p: Add 9P transport registration
This patch introduces the 9P transport registration and lookup API.
Signed-off-by: Cristian Banu <cristb@xxxxxxxxx>
---
lib/uk9p/9pdev_trans.c | 82 +++++++++++++++++++++++++++++++
lib/uk9p/Makefile.uk | 2 +
lib/uk9p/exportsyms.uk | 3 ++
lib/uk9p/include/uk/9pdev_trans.h | 101 ++++++++++++++++++++++++++++++++++++++
4 files changed, 188 insertions(+)
create mode 100644 lib/uk9p/9pdev_trans.c
create mode 100644 lib/uk9p/exportsyms.uk
create mode 100644 lib/uk9p/include/uk/9pdev_trans.h
diff --git a/lib/uk9p/9pdev_trans.c b/lib/uk9p/9pdev_trans.c
new file mode 100644
index 000000000000..60b8a230cbf3
--- /dev/null
+++ b/lib/uk9p/9pdev_trans.c
@@ -0,0 +1,82 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
+/*
+ * Authors: Cristian Banu <cristb@xxxxxxxxx>
+ *
+ * Copyright (c) 2019, University Politehnica of Bucharest. All rights
reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holder nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ * THIS HEADER MAY NOT BE EXTRACTED OR MODIFIED IN ANY WAY.
+ */
+
+#include <errno.h>
+#include <string.h>
+#include <uk/config.h>
+#include <uk/list.h>
+#include <uk/assert.h>
+#include <uk/9pdev_trans.h>
+
+static UK_LIST_HEAD(uk_9pdev_trans_list);
+
+int uk_9pdev_trans_register(struct uk_9pdev_trans *trans)
+{
+ UK_ASSERT(trans);
+ UK_ASSERT(trans->name);
+ UK_ASSERT(trans->a);
+
+ uk_list_add_tail(&trans->_list, &uk_9pdev_trans_list);
+ uk_pr_info("Registered transport %s\n", trans->name);
+
+ return 0;
+}
+
+int uk_9pdev_trans_by_name(const char *name, struct uk_9pdev_trans **trans)
+{
+ struct uk_9pdev_trans *t;
+
+ uk_list_for_each_entry(t, &uk_9pdev_trans_list, _list) {
+ if (!strcmp(t->name, name)) {
+ *trans = t;
+ return 0;
+ }
+ }
+
+ return -ENODEV;
+}
+
+int uk_9pdev_trans_default(struct uk_9pdev_trans **trans)
+{
+ struct uk_9pdev_trans *t;
+
+ uk_list_for_each_entry(t, &uk_9pdev_trans_list, _list) {
+ if (t->is_default) {
+ *trans = t;
+ return 0;
+ }
+ }
+
+ return -ENODEV;
+}
diff --git a/lib/uk9p/Makefile.uk b/lib/uk9p/Makefile.uk
index fa754440598c..b1071a0e7d3c 100644
--- a/lib/uk9p/Makefile.uk
+++ b/lib/uk9p/Makefile.uk
@@ -2,3 +2,5 @@ $(eval $(call addlib_s,libuk9p,$(CONFIG_LIBUK9P)))
CINCLUDES-$(CONFIG_LIBUK9P) += -I$(LIBUK9P_BASE)/include
CXXINCLUDES-$(CONFIG_LIBUK9P) += -I$(LIBUK9P_BASE)/include
+
+LIBUK9P_SRCS-y += $(LIBUK9P_BASE)/9pdev_trans.c
diff --git a/lib/uk9p/exportsyms.uk b/lib/uk9p/exportsyms.uk
new file mode 100644
index 000000000000..45f487da2fff
--- /dev/null
+++ b/lib/uk9p/exportsyms.uk
@@ -0,0 +1,3 @@
+uk_9pdev_trans_register
+uk_9pdev_trans_by_name
+uk_9pdev_trans_default
diff --git a/lib/uk9p/include/uk/9pdev_trans.h
b/lib/uk9p/include/uk/9pdev_trans.h
new file mode 100644
index 000000000000..a0c6d252361c
--- /dev/null
+++ b/lib/uk9p/include/uk/9pdev_trans.h
@@ -0,0 +1,101 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
+/*
+ * Authors: Cristian Banu <cristb@xxxxxxxxx>
+ *
+ * Copyright (c) 2019, University Politehnica of Bucharest. All rights
reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holder nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ * THIS HEADER MAY NOT BE EXTRACTED OR MODIFIED IN ANY WAY.
+ */
+
+#ifndef __UK_9PDEV_TRANS__
+#define __UK_9PDEV_TRANS__
+
+#include <stdbool.h>
+#include <uk/config.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** A structure used to describe a transport. */
+struct uk_9pdev_trans {
+ /*
+ * Transport name (e.g. "virtio", "xen"). This field is reserved for
+ * future use, when multiple transport options are available on the
+ * same platform.
+ */
+ const char *name;
+ /* Can the transport be used as a default one? */
+ bool is_default;
+ /* Allocator used for devices which use this transport layer. */
+ struct uk_alloc *a;
+ /* @internal Entry in the list of available transports. */
+ struct uk_list_head _list;
+};
+
+/**
+ * Adds a transport to the available transports list for Unikraft 9P Devices.
+ * This should be called once per driver (once for virtio, once for xen, etc.).
+ *
+ * @param trans
+ * Pointer to the transport structure.
+ * @return
+ * - (0): Successful.
+ * - (< 0): Failed to register the transport layer.
+ */
+int uk_9pdev_trans_register(struct uk_9pdev_trans *trans);
+
+/**
+ * Looks up a transport layer by its name.
+ *
+ * @param name
+ * The transport layer name.
+ * @param trans
+ * Where to store the pointer to the found transport structure.
+ * @return
+ * - (-ENOENT): No transport with the given name.
+ * - (0): Successful.
+ */
+int uk_9pdev_trans_by_name(const char *name, struct uk_9pdev_trans **trans);
+
+/**
+ * Gets the default transport layer.
+ *
+ * @param trans
+ * Where to store the pointer to the found transport structure.
+ * @return
+ * - (-ENOENT): No default transport found.
+ * - (0): Successful.
+ */
+int uk_9pdev_trans_default(struct uk_9pdev_trans **trans);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __UK_9PDEV_TRANS__ */
--
2.11.0
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