[PATCH v4 6/9] remote: Plumbing for getting/setting specific IOThread pinning

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Implement the remote plumbing to get an IOThread's pinned CPU data or
to allow pinning an IOThread to a specific CPU set

Signed-off-by: John Ferlan <jferlan@xxxxxxxxxx>
---
 daemon/remote.c              | 49 ++++++++++++++++++++++++++++++++++
 src/remote/remote_driver.c   | 62 ++++++++++++++++++++++++++++++++++++++++++++
 src/remote/remote_protocol.x | 35 ++++++++++++++++++++++++-
 src/remote_protocol-structs  | 24 +++++++++++++++++
 src/rpc/gendispatch.pl       |  1 +
 5 files changed, 170 insertions(+), 1 deletion(-)

diff --git a/daemon/remote.c b/daemon/remote.c
index ff64eeb..8907b7e 100644
--- a/daemon/remote.c
+++ b/daemon/remote.c
@@ -2341,6 +2341,55 @@ remoteDispatchDomainGetIOThreadsInfo(virNetServerPtr server ATTRIBUTE_UNUSED,
 }
 
 static int
+remoteDispatchDomainGetIOThreadPin(virNetServerPtr server ATTRIBUTE_UNUSED,
+                                   virNetServerClientPtr client ATTRIBUTE_UNUSED,
+                                   virNetMessagePtr msg ATTRIBUTE_UNUSED,
+                                   virNetMessageErrorPtr rerr,
+                                   remote_domain_get_iothread_pin_args *args,
+                                   remote_domain_get_iothread_pin_ret *ret)
+{
+    virDomainPtr dom = NULL;
+    unsigned char *cpumap = NULL;
+    int r;
+    int rv = -1;
+    struct daemonClientPrivate *priv =
+        virNetServerClientGetPrivateData(client);
+
+    if (!priv->conn) {
+        virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("connection not open"));
+        goto cleanup;
+    }
+
+    if (!(dom = get_nonnull_domain(priv->conn, args->dom)))
+        goto cleanup;
+
+    /* Allocate buffers to take the results */
+    if (args->maplen > 0 &&
+        VIR_ALLOC_N(cpumap, args->maplen) < 0)
+        goto cleanup;
+
+    if ((r = virDomainGetIOThreadPin(dom,
+                                     args->iothread_id,
+                                     cpumap,
+                                     args->maplen,
+                                     args->flags)) < 0)
+        goto cleanup;
+
+    ret->ret = r;
+    ret->cpumap.cpumap_len = args->maplen;
+    ret->cpumap.cpumap_val = (char *) cpumap;
+    cpumap = NULL;
+
+    rv = 0;
+
+ cleanup:
+    if (rv < 0)
+        virNetMessageSaveError(rerr);
+    VIR_FREE(cpumap);
+    virObjectUnref(dom);
+    return rv;
+}
+static int
 remoteDispatchDomainMigratePrepare(virNetServerPtr server ATTRIBUTE_UNUSED,
                                    virNetServerClientPtr client ATTRIBUTE_UNUSED,
                                    virNetMessagePtr msg ATTRIBUTE_UNUSED,
diff --git a/src/remote/remote_driver.c b/src/remote/remote_driver.c
index 42dab9d..fa99a31 100644
--- a/src/remote/remote_driver.c
+++ b/src/remote/remote_driver.c
@@ -2394,6 +2394,66 @@ remoteDomainGetIOThreadsInfo(virDomainPtr dom,
 }
 
 static int
+remoteDomainGetIOThreadPin(virDomainPtr domain,
+                           unsigned int iothread_id,
+                           unsigned char *cpumap,
+                           int maplen,
+                           unsigned int flags)
+{
+    int rv = -1;
+    size_t i;
+    remote_domain_get_iothread_pin_args args;
+    remote_domain_get_iothread_pin_ret ret;
+    struct private_data *priv = domain->conn->privateData;
+
+    remoteDriverLock(priv);
+
+    /* There is only one cpumap for each IOThread thread */
+    if (maplen > REMOTE_CPUMAPS_MAX) {
+        virReportError(VIR_ERR_RPC,
+                       _("IOThread map buffer length exceeds maximum: %d > %d"),
+                       maplen, REMOTE_CPUMAPS_MAX);
+        goto done;
+    }
+
+    make_nonnull_domain(&args.dom, domain);
+    args.iothread_id = iothread_id;
+    args.maplen = maplen;
+    args.flags = flags;
+
+    memset(&ret, 0, sizeof(ret));
+
+    if (call(domain->conn, priv, 0, REMOTE_PROC_DOMAIN_GET_IOTHREAD_PIN,
+             (xdrproc_t) xdr_remote_domain_get_iothread_pin_args,
+             (char *) &args,
+             (xdrproc_t) xdr_remote_domain_get_iothread_pin_ret,
+             (char *) &ret) == -1)
+        goto done;
+
+    if (ret.cpumap.cpumap_len > maplen) {
+        virReportError(VIR_ERR_RPC,
+                       _("host reports map buffer length exceeds maximum: %d > %d"),
+                       ret.cpumap.cpumap_len, maplen);
+        goto cleanup;
+    }
+
+    memset(cpumap, 0, maplen);
+
+    for (i = 0; i < ret.cpumap.cpumap_len; ++i)
+        cpumap[i] = ret.cpumap.cpumap_val[i];
+
+    rv = ret.ret;
+
+ cleanup:
+    xdr_free((xdrproc_t) xdr_remote_domain_get_iothread_pin_ret,
+             (char *) &ret);
+
+ done:
+    remoteDriverUnlock(priv);
+    return rv;
+}
+
+static int
 remoteDomainGetSecurityLabel(virDomainPtr domain, virSecurityLabelPtr seclabel)
 {
     remote_domain_get_security_label_args args;
@@ -8106,6 +8166,8 @@ static virHypervisorDriver hypervisor_driver = {
     .domainGetVcpus = remoteDomainGetVcpus, /* 0.3.0 */
     .domainGetMaxVcpus = remoteDomainGetMaxVcpus, /* 0.3.0 */
     .domainGetIOThreadsInfo = remoteDomainGetIOThreadsInfo, /* 1.2.14 */
+    .domainGetIOThreadPin = remoteDomainGetIOThreadPin, /* 1.2.14 */
+    .domainPinIOThread = remoteDomainPinIOThread, /* 1.2.14 */
     .domainGetSecurityLabel = remoteDomainGetSecurityLabel, /* 0.6.1 */
     .domainGetSecurityLabelList = remoteDomainGetSecurityLabelList, /* 0.10.0 */
     .nodeGetSecurityModel = remoteNodeGetSecurityModel, /* 0.6.1 */
diff --git a/src/remote/remote_protocol.x b/src/remote/remote_protocol.x
index 4ea535e..dc916f3 100644
--- a/src/remote/remote_protocol.x
+++ b/src/remote/remote_protocol.x
@@ -1199,6 +1199,25 @@ struct remote_domain_get_iothreads_info_ret {
     unsigned int ret;
 };
 
+struct remote_domain_get_iothread_pin_args {
+    remote_nonnull_domain dom;
+    unsigned int iothread_id;
+    int maplen;
+    unsigned int flags;
+};
+
+struct remote_domain_get_iothread_pin_ret {
+    opaque cpumap<REMOTE_CPUMAPS_MAX>;
+    int ret;
+};
+
+struct remote_domain_pin_iothread_args {
+    remote_nonnull_domain dom;
+    unsigned int iothreads_id;
+    opaque cpumap<REMOTE_CPUMAP_MAX>; /* (unsigned char *) */
+    unsigned int flags;
+};
+
 struct remote_domain_get_security_label_args {
     remote_nonnull_domain dom;
 };
@@ -5593,5 +5612,19 @@ enum remote_procedure {
      * @generate: none
      * @acl: domain:read
      */
-    REMOTE_PROC_DOMAIN_GET_IOTHREADS_INFO = 351
+    REMOTE_PROC_DOMAIN_GET_IOTHREADS_INFO = 351,
+
+    /**
+     * @generate: none
+     * @acl: domain:read
+     */
+    REMOTE_PROC_DOMAIN_GET_IOTHREAD_PIN = 352,
+
+    /**
+     * @generate: both
+     * @acl: domain:write
+     * @acl: domain:save:!VIR_DOMAIN_AFFECT_CONFIG|VIR_DOMAIN_AFFECT_LIVE
+     * @acl: domain:save:VIR_DOMAIN_AFFECT_CONFIG
+     */
+    REMOTE_PROC_DOMAIN_PIN_IOTHREAD = 353
 };
diff --git a/src/remote_protocol-structs b/src/remote_protocol-structs
index 907bcd4..4fa710c 100644
--- a/src/remote_protocol-structs
+++ b/src/remote_protocol-structs
@@ -825,6 +825,28 @@ struct remote_domain_get_iothreads_info_ret {
         } info;
         u_int                      ret;
 };
+struct remote_domain_get_iothread_pin_args {
+        remote_nonnull_domain      dom;
+        u_int                      iothread_id;
+        int                        maplen;
+        u_int                      flags;
+};
+struct remote_domain_get_iothread_pin_ret {
+        struct {
+                u_int              cpumap_len;
+                char *             cpumap_val;
+        } cpumap;
+        int                        ret;
+};
+struct remote_domain_pin_iothread_args {
+        remote_nonnull_domain      dom;
+        u_int                      iothreads_id;
+        struct {
+                u_int              cpumap_len;
+                char *             cpumap_val;
+        } cpumap;
+        u_int                      flags;
+};
 struct remote_domain_get_security_label_args {
         remote_nonnull_domain      dom;
 };
@@ -2982,4 +3004,6 @@ enum remote_procedure {
         REMOTE_PROC_DOMAIN_GET_FSINFO = 349,
         REMOTE_PROC_DOMAIN_DEFINE_XML_FLAGS = 350,
         REMOTE_PROC_DOMAIN_GET_IOTHREADS_INFO = 351,
+        REMOTE_PROC_DOMAIN_GET_IOTHREAD_PIN = 352,
+        REMOTE_PROC_DOMAIN_PIN_IOTHREAD = 353,
 };
diff --git a/src/rpc/gendispatch.pl b/src/rpc/gendispatch.pl
index 78cb415..8b488eb 100755
--- a/src/rpc/gendispatch.pl
+++ b/src/rpc/gendispatch.pl
@@ -68,6 +68,7 @@ sub fixup_name {
     $name =~ s/Fsthaw$/FSThaw/;
     $name =~ s/Fsinfo$/FSInfo/;
     $name =~ s/Iothreads$/IOThreads/;
+    $name =~ s/Iothread$/IOThread/;
     $name =~ s/Scsi/SCSI/;
     $name =~ s/Wwn$/WWN/;
     $name =~ s/Dhcp$/DHCP/;
-- 
2.1.0

--
libvir-list mailing list
libvir-list@xxxxxxxxxx
https://www.redhat.com/mailman/listinfo/libvir-list




[Index of Archives]     [Virt Tools]     [Libvirt Users]     [Lib OS Info]     [Fedora Users]     [Fedora Desktop]     [Fedora SELinux]     [Big List of Linux Books]     [Yosemite News]     [KDE Users]     [Fedora Tools]