[vmw_vmci 02/11] Apply VMCI datagram code
Implements datagrams to allow data to be sent between host
and guest.
Signed-off-by: Andrew Stiegmann (stieg)
---
drivers/misc/vmw_vmci/vmci_datagram.c | 586 +
drivers/misc/vmw_vmci/vmci_datagram.h | 56
2 files changed, 642 insertions(+), 0 deletions(-)
create mode 100644 drivers/misc/vmw_vmci/vmci_datagram.c
create mode 100644 drivers/misc/vmw_vmci/vmci_datagram.h
diff --git a/drivers/misc/vmw_vmci/vmci_datagram.c
b/drivers/misc/vmw_vmci/vmci_datagram.c
new file mode 100644
index 000..a804f99
--- /dev/null
+++ b/drivers/misc/vmw_vmci/vmci_datagram.c
@@ -0,0 +1,586 @@
+/*
+ * VMware VMCI Driver
+ *
+ * Copyright (C) 2012 VMware, Inc. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation version 2 and no later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include
+#include
+#include
+#include
+#include
+
+#include "vmci_common_int.h"
+#include "vmci_context.h"
+#include "vmci_datagram.h"
+#include "vmci_driver.h"
+#include "vmci_event.h"
+#include "vmci_hash_table.h"
+#include "vmci_resource.h"
+#include "vmci_route.h"
+
+/*
+ * struct datagram_entry describes the datagram entity. It is used for datagram
+ * entities created only on the host.
+ */
+struct datagram_entry {
+ struct vmci_resource resource;
+ uint32_t flags;
+ bool runDelayed;
+ VMCIDatagramRecvCB recvCB;
+ void *clientData;
+ wait_queue_head_t destroyEvent;
+ uint32_t privFlags;
+};
+
+struct delayed_datagram_info {
+ bool inDGHostQueue;
+ struct datagram_entry *entry;
+ struct vmci_dg msg;
+};
+
+static atomic_t delayedDGHostQueueSize;
+
+static void dg_free_cb(void *clientData)
+{
+ struct datagram_entry *entry = (struct datagram_entry *)clientData;
+ ASSERT(entry);
+
+ /*
+* Entry is freed in VMCIDatagram_DestroyHnd, who waits for
+* the signal.
+*/
+ wake_up(>destroyEvent);
+}
+
+static int dg_release_cb(void *clientData)
+{
+ struct datagram_entry *entry = (struct datagram_entry *)clientData;
+ ASSERT(entry);
+ vmci_resource_release(>resource);
+ return 0;
+}
+
+/*
+ * Create a datagram entry given a handle pointer.
+ */
+static int dg_create_handle(uint32_t resourceID,
+ uint32_t flags,
+ uint32_t privFlags,
+ VMCIDatagramRecvCB recvCB,
+ void *clientData,
+ struct vmci_handle *outHandle)
+{
+ int result;
+ uint32_t contextID;
+ struct vmci_handle handle;
+ struct datagram_entry *entry;
+
+ ASSERT(recvCB != NULL);
+ ASSERT(outHandle != NULL);
+ ASSERT(!(privFlags & ~VMCI_PRIVILEGE_ALL_FLAGS));
+
+ if ((flags & VMCI_FLAG_WELLKNOWN_DG_HND) != 0) {
+ return VMCI_ERROR_INVALID_ARGS;
+ } else {
+ if ((flags & VMCI_FLAG_ANYCID_DG_HND) != 0) {
+ contextID = VMCI_INVALID_ID;
+ } else {
+ contextID = VMCI_GetContextID();
+ if (contextID == VMCI_INVALID_ID)
+ return VMCI_ERROR_NO_RESOURCES;
+ }
+
+ if (resourceID == VMCI_INVALID_ID) {
+ resourceID = vmci_resource_get_id(contextID);
+ if (resourceID == VMCI_INVALID_ID)
+ return VMCI_ERROR_NO_HANDLE;
+ }
+
+ handle = vmci_make_handle(contextID, resourceID);
+ }
+
+ entry = kmalloc(sizeof *entry, GFP_KERNEL);
+ if (entry == NULL) {
+ pr_warn("Failed allocating memory for datagram entry.");
+ return VMCI_ERROR_NO_MEM;
+ }
+
+ entry->runDelayed = (flags & VMCI_FLAG_DG_DELAYED_CB) ? true : false;
+ entry->flags = flags;
+ entry->recvCB = recvCB;
+ entry->clientData = clientData;
+ init_waitqueue_head(>destroyEvent);
+ entry->privFlags = privFlags;
+
+ /* Make datagram resource live. */
+ result = vmci_resource_add(>resource,
+ VMCI_RESOURCE_TYPE_DATAGRAM,
+ handle, dg_free_cb, entry);
+ if (result != VMCI_SUCCESS) {
+ pr_warn("Failed to add new resource (handle=0x%x:0x%x).",
+
[vmw_vmci 02/11] Apply VMCI datagram code
Implements datagrams to allow data to be sent between host
and guest.
Signed-off-by: Andrew Stiegmann (stieg) astiegm...@vmware.com
---
drivers/misc/vmw_vmci/vmci_datagram.c | 586 +
drivers/misc/vmw_vmci/vmci_datagram.h | 56
2 files changed, 642 insertions(+), 0 deletions(-)
create mode 100644 drivers/misc/vmw_vmci/vmci_datagram.c
create mode 100644 drivers/misc/vmw_vmci/vmci_datagram.h
diff --git a/drivers/misc/vmw_vmci/vmci_datagram.c
b/drivers/misc/vmw_vmci/vmci_datagram.c
new file mode 100644
index 000..a804f99
--- /dev/null
+++ b/drivers/misc/vmw_vmci/vmci_datagram.c
@@ -0,0 +1,586 @@
+/*
+ * VMware VMCI Driver
+ *
+ * Copyright (C) 2012 VMware, Inc. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation version 2 and no later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include linux/bug.h
+#include linux/module.h
+#include linux/sched.h
+#include linux/vmw_vmci_api.h
+#include linux/vmw_vmci_defs.h
+
+#include vmci_common_int.h
+#include vmci_context.h
+#include vmci_datagram.h
+#include vmci_driver.h
+#include vmci_event.h
+#include vmci_hash_table.h
+#include vmci_resource.h
+#include vmci_route.h
+
+/*
+ * struct datagram_entry describes the datagram entity. It is used for datagram
+ * entities created only on the host.
+ */
+struct datagram_entry {
+ struct vmci_resource resource;
+ uint32_t flags;
+ bool runDelayed;
+ VMCIDatagramRecvCB recvCB;
+ void *clientData;
+ wait_queue_head_t destroyEvent;
+ uint32_t privFlags;
+};
+
+struct delayed_datagram_info {
+ bool inDGHostQueue;
+ struct datagram_entry *entry;
+ struct vmci_dg msg;
+};
+
+static atomic_t delayedDGHostQueueSize;
+
+static void dg_free_cb(void *clientData)
+{
+ struct datagram_entry *entry = (struct datagram_entry *)clientData;
+ ASSERT(entry);
+
+ /*
+* Entry is freed in VMCIDatagram_DestroyHnd, who waits for
+* the signal.
+*/
+ wake_up(entry-destroyEvent);
+}
+
+static int dg_release_cb(void *clientData)
+{
+ struct datagram_entry *entry = (struct datagram_entry *)clientData;
+ ASSERT(entry);
+ vmci_resource_release(entry-resource);
+ return 0;
+}
+
+/*
+ * Create a datagram entry given a handle pointer.
+ */
+static int dg_create_handle(uint32_t resourceID,
+ uint32_t flags,
+ uint32_t privFlags,
+ VMCIDatagramRecvCB recvCB,
+ void *clientData,
+ struct vmci_handle *outHandle)
+{
+ int result;
+ uint32_t contextID;
+ struct vmci_handle handle;
+ struct datagram_entry *entry;
+
+ ASSERT(recvCB != NULL);
+ ASSERT(outHandle != NULL);
+ ASSERT(!(privFlags ~VMCI_PRIVILEGE_ALL_FLAGS));
+
+ if ((flags VMCI_FLAG_WELLKNOWN_DG_HND) != 0) {
+ return VMCI_ERROR_INVALID_ARGS;
+ } else {
+ if ((flags VMCI_FLAG_ANYCID_DG_HND) != 0) {
+ contextID = VMCI_INVALID_ID;
+ } else {
+ contextID = VMCI_GetContextID();
+ if (contextID == VMCI_INVALID_ID)
+ return VMCI_ERROR_NO_RESOURCES;
+ }
+
+ if (resourceID == VMCI_INVALID_ID) {
+ resourceID = vmci_resource_get_id(contextID);
+ if (resourceID == VMCI_INVALID_ID)
+ return VMCI_ERROR_NO_HANDLE;
+ }
+
+ handle = vmci_make_handle(contextID, resourceID);
+ }
+
+ entry = kmalloc(sizeof *entry, GFP_KERNEL);
+ if (entry == NULL) {
+ pr_warn(Failed allocating memory for datagram entry.);
+ return VMCI_ERROR_NO_MEM;
+ }
+
+ entry-runDelayed = (flags VMCI_FLAG_DG_DELAYED_CB) ? true : false;
+ entry-flags = flags;
+ entry-recvCB = recvCB;
+ entry-clientData = clientData;
+ init_waitqueue_head(entry-destroyEvent);
+ entry-privFlags = privFlags;
+
+ /* Make datagram resource live. */
+ result = vmci_resource_add(entry-resource,
+ VMCI_RESOURCE_TYPE_DATAGRAM,
+ handle, dg_free_cb, entry);
+ if (result != VMCI_SUCCESS) {
+
