[PATCH v5 18/50] multi-process: configure remote side devices

[Jagannathan Raman]

From: Elena Ufimtseva <elena.ufimts...@oracle.com>

Add functions to configure remote devices.

Signed-off-by: Elena Ufimtseva <elena.ufimts...@oracle.com>
Signed-off-by: John G Johnson <john.g.john...@oracle.com>
Signed-off-by: Jagannathan Raman <jag.ra...@oracle.com>
---
 v4 -> v5:
  - Fixed qstr leak issue

 hw/proxy/qemu-proxy.c         | 56 ++++++++++++++++++++++++++++++++++++++++++-
 include/hw/proxy/qemu-proxy.h |  3 +++
 include/io/mpqemu-link.h      |  9 +++++++
 3 files changed, 67 insertions(+), 1 deletion(-)

diff --git a/hw/proxy/qemu-proxy.c b/hw/proxy/qemu-proxy.c
index 0cf7dcc..3ba05d9 100644
--- a/hw/proxy/qemu-proxy.c
+++ b/hw/proxy/qemu-proxy.c
@@ -21,8 +21,60 @@
 #include "qemu/event_notifier.h"
 #include "sysemu/kvm.h"
 #include "util/event_notifier-posix.c"
+#include "hw/boards.h"
+#include "include/qemu/log.h"
 
 static void pci_proxy_dev_realize(PCIDevice *dev, Error **errp);
+static void setup_irqfd(PCIProxyDev *dev);
+
+static void proxy_ready(PCIDevice *dev)
+{
+    PCIProxyDev *pdev = PCI_PROXY_DEV(dev);
+
+    setup_irqfd(pdev);
+}
+
+static int set_remote_opts(PCIDevice *dev, QDict *qdict, unsigned int cmd)
+{
+    QString *qstr;
+    MPQemuMsg msg;
+    PCIProxyDev *pdev;
+    const char *str;
+    uint32_t reply = 0;
+    int rc = -EINVAL;
+    int wait;
+
+    pdev = PCI_PROXY_DEV(dev);
+
+    qstr = qobject_to_json(QOBJECT(qdict));
+    str = qstring_get_str(qstr);
+
+    memset(&msg, 0, sizeof(MPQemuMsg));
+
+    msg.data2 = (uint8_t *)(str);
+    msg.cmd = cmd;
+    msg.bytestream = 1;
+    msg.size = qstring_get_length(qstr) + 1;
+
+
+    wait = eventfd(0, EFD_NONBLOCK);
+    msg.num_fds = 1;
+    msg.fds[0] = wait;
+
+    mpqemu_msg_send(&msg, pdev->mpqemu_link->com);
+
+    reply = (uint32_t)wait_for_remote(wait);
+    close(wait);
+
+    /* TODO: Add proper handling if remote did not set options. */
+    if (reply == REMOTE_OK) {
+        rc = 0;
+    }
+
+    qobject_unref(qstr);
+
+    return rc;
+}
 
 static int add_argv(char *opts_str, char **argv, int argc)
 {
@@ -297,7 +349,6 @@ static void init_proxy(PCIDevice *dev, char *command, char 
*exec_name,
                         pdev->socket);
 
     configure_memory_sync(pdev->sync, pdev->mpqemu_link);
-    setup_irqfd(pdev);
 }
 
 static void pci_proxy_dev_realize(PCIDevice *device, Error **errp)
@@ -317,6 +368,9 @@ static void pci_proxy_dev_realize(PCIDevice *device, Error 
**errp)
     dev->get_proxy_sock = get_proxy_sock;
     dev->init_proxy = init_proxy;
     dev->sync = REMOTE_MEM_SYNC(object_new(TYPE_MEMORY_LISTENER));
+
+    dev->set_remote_opts = set_remote_opts;
+    dev->proxy_ready = proxy_ready;
 }
 
 static void send_bar_access_msg(PCIProxyDev *dev, MemoryRegion *mr,
diff --git a/include/hw/proxy/qemu-proxy.h b/include/hw/proxy/qemu-proxy.h
index 56aec0e..cd8505a 100644
--- a/include/hw/proxy/qemu-proxy.h
+++ b/include/hw/proxy/qemu-proxy.h
@@ -14,6 +14,8 @@
 #include "io/mpqemu-link.h"
 #include "hw/proxy/memory-sync.h"
 #include "qemu/event_notifier.h"
+#include "hw/pci/pci.h"
+#include "block/qdict.h"
 
 #define TYPE_PCI_PROXY_DEV "pci-proxy-dev"
 
@@ -62,6 +64,7 @@ struct PCIProxyDev {
     void (*set_proxy_sock) (PCIDevice *dev, int socket);
     int (*get_proxy_sock) (PCIDevice *dev);
 
+    int (*set_remote_opts) (PCIDevice *dev, QDict *qdict, unsigned int cmd);
     void (*proxy_ready) (PCIDevice *dev);
     void (*init_proxy) (PCIDevice *dev, char *command, char *exec_name,
                         bool need_spawn, Error **errp);
diff --git a/include/io/mpqemu-link.h b/include/io/mpqemu-link.h
index 13c4b80..90a8437 100644
--- a/include/io/mpqemu-link.h
+++ b/include/io/mpqemu-link.h
@@ -54,9 +54,18 @@ typedef enum {
     BAR_WRITE,
     BAR_READ,
     SET_IRQFD,
+    DEV_OPTS,
+    DRIVE_OPTS,
+    DEVICE_ADD,
+    DEVICE_DEL,
     MAX,
 } mpqemu_cmd_t;
 
+typedef enum {
+    REMOTE_OK = 0,
+    REMOTE_FAIL,
+} mpqemu_reply_t;
+
 /**
  * MPQemuMsg:
  * @cmd: The remote command
-- 
1.8.3.1