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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v2 5/8] tools: dynamically attach/detach CQM service for a guest
From: Dongxiao Xu <dongxiao.xu@xxxxxxxxx>
Add two new xl instruction for attaching and detaching CQM services
for a running guest.
Above "qos_res" is the monitoring resource type, and current supported
type is "cqm".
Signed-off-by: Jiongxi Li <jiongxi.li@xxxxxxxxx>
Signed-off-by: Dongxiao Xu <dongxiao.xu@xxxxxxxxx>
---
tools/libxc/xc_domain.c | 18 ++++++++++
tools/libxc/xenctrl.h | 2 ++
tools/libxl/Makefile | 3 +-
tools/libxl/libxl.h | 3 ++
tools/libxl/libxl_pqos.c | 88 +++++++++++++++++++++++++++++++++++++++++++++
tools/libxl/xl.h | 2 ++
tools/libxl/xl_cmdimpl.c | 36 +++++++++++++++++++
tools/libxl/xl_cmdtable.c | 10 ++++++
8 files changed, 161 insertions(+), 1 deletion(-)
create mode 100644 tools/libxl/libxl_pqos.c
diff --git a/tools/libxc/xc_domain.c b/tools/libxc/xc_domain.c
index 1ccafc5..85c2d4d 100644
--- a/tools/libxc/xc_domain.c
+++ b/tools/libxc/xc_domain.c
@@ -1776,6 +1776,24 @@ int xc_domain_set_max_evtchn(xc_interface *xch, uint32_t
domid,
return do_domctl(xch, &domctl);
}
+int xc_domain_pqos_attach(xc_interface *xch, uint32_t domid, int flags)
+{
+ DECLARE_DOMCTL;
+ domctl.cmd = XEN_DOMCTL_attach_pqos;
+ domctl.domain = (domid_t)domid;
+ domctl.u.qos_res.flags = flags;
+ return do_domctl(xch, &domctl);
+}
+
+int xc_domain_pqos_detach(xc_interface *xch, uint32_t domid, int flags)
+{
+ DECLARE_DOMCTL;
+ domctl.cmd = XEN_DOMCTL_detach_pqos;
+ domctl.domain = (domid_t)domid;
+ domctl.u.qos_res.flags = flags;
+ return do_domctl(xch, &domctl);
+}
+
/*
* Local variables:
* mode: C
diff --git a/tools/libxc/xenctrl.h b/tools/libxc/xenctrl.h
index 4ac6b8a..a57f147 100644
--- a/tools/libxc/xenctrl.h
+++ b/tools/libxc/xenctrl.h
@@ -2395,4 +2395,6 @@ int xc_kexec_load(xc_interface *xch, uint8_t type,
uint16_t arch,
*/
int xc_kexec_unload(xc_interface *xch, int type);
+int xc_domain_pqos_attach(xc_interface *xch, uint32_t domid, int flags);
+int xc_domain_pqos_detach(xc_interface *xch, uint32_t domid, int flags);
#endif /* XENCTRL_H */
diff --git a/tools/libxl/Makefile b/tools/libxl/Makefile
index cf214bb..35f0b97 100644
--- a/tools/libxl/Makefile
+++ b/tools/libxl/Makefile
@@ -74,7 +74,8 @@ LIBXL_OBJS = flexarray.o libxl.o libxl_create.o libxl_dm.o
libxl_pci.o \
libxl_internal.o libxl_utils.o libxl_uuid.o \
libxl_json.o libxl_aoutils.o libxl_numa.o \
libxl_save_callout.o _libxl_save_msgs_callout.o \
- libxl_qmp.o libxl_event.o libxl_fork.o $(LIBXL_OBJS-y)
+ libxl_qmp.o libxl_event.o libxl_fork.o libxl_pqos.o \
+ $(LIBXL_OBJS-y)
LIBXL_OBJS += _libxl_types.o libxl_flask.o _libxl_types_internal.o
$(LIBXL_OBJS): CFLAGS += $(CFLAGS_LIBXL) -include $(XEN_ROOT)/tools/config.h
diff --git a/tools/libxl/libxl.h b/tools/libxl/libxl.h
index c7dceda..a9a506f 100644
--- a/tools/libxl/libxl.h
+++ b/tools/libxl/libxl.h
@@ -1051,6 +1051,9 @@ int libxl_flask_getenforce(libxl_ctx *ctx);
int libxl_flask_setenforce(libxl_ctx *ctx, int mode);
int libxl_flask_loadpolicy(libxl_ctx *ctx, void *policy, uint32_t size);
+int libxl_pqos_attach(libxl_ctx *ctx, uint32_t domid, const char * qosres);
+int libxl_pqos_detach(libxl_ctx *ctx, uint32_t domid, const char * qosres);
+
/* misc */
/* Each of these sets or clears the flag according to whether the
diff --git a/tools/libxl/libxl_pqos.c b/tools/libxl/libxl_pqos.c
new file mode 100644
index 0000000..e92b94b
--- /dev/null
+++ b/tools/libxl/libxl_pqos.c
@@ -0,0 +1,88 @@
+/*
+ * Copyright (C) 2013 Intel Corporation
+ * Author Jiongxi Li <jiongxi.li@xxxxxxxxx>
+ * Author Dongxiao Xu <dongxiao.xu@xxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published
+ * by the Free Software Foundation; version 2.1 only. with the special
+ * exception on linking described in file LICENSE.
+ *
+ * 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 Lesser General Public License for more details.
+ */
+
+#include "libxl_osdeps.h" /* must come before any other headers */
+#include "libxl_internal.h"
+
+int libxl_pqos_attach(libxl_ctx *ctx, uint32_t domid, const char * qosres)
+{
+ int rc;
+ int flags = 0;
+
+ if (!strcmp(qosres, "cqm"))
+ flags |= XEN_DOMCTL_ADF_pqos_cqm;
+ else {
+ rc = -EINVAL;
+ fprintf(stderr, "Invalid QoS resource type! "
+ "Supported types are: \"cqm\".\n");
+ return rc;
+ }
+
+ rc = xc_domain_pqos_attach(ctx->xch, domid, flags);
+ if (rc < 0) {
+ fprintf(stderr, "Failed to attach CQM service to domain %d. ", domid);
+ if (errno == ENODEV)
+ fprintf(stderr, "CQM is not supported in this system.\n");
+ else if (errno == EBUSY)
+ fprintf(stderr, "There is no free CQM RMID available.\n");
+ else if (errno == EINVAL)
+ fprintf(stderr, "Domain %d is already attached with CQM
service.\n", domid);
+ else if (errno == ESRCH)
+ fprintf(stderr, "Is Domain %d a valid domain?\n", domid);
+ else
+ fprintf(stderr, "errno: %d\n", errno);
+ }
+
+ return rc;
+}
+
+int libxl_pqos_detach(libxl_ctx *ctx, uint32_t domid, const char * qosres)
+{
+ int rc;
+ int flags = 0;
+
+ if (!strcmp(qosres, "cqm"))
+ flags |= XEN_DOMCTL_ADF_pqos_cqm;
+ else {
+ rc = -EINVAL;
+ fprintf(stderr, "Invalid QoS resource type! "
+ "Supported types are: \"cqm\".\n");
+ return rc;
+ }
+
+ rc = xc_domain_pqos_detach(ctx->xch, domid, flags);
+ if (rc < 0) {
+ fprintf(stderr, "Failed to detach CQM service to domain %d. ", domid);
+ if (errno == ENODEV)
+ fprintf(stderr, "CQM is not supported in this system.\n");
+ else if (errno == EINVAL)
+ fprintf(stderr, "Domain %d is not attached with CQM service.\n",
domid);
+ else if (errno == ESRCH)
+ fprintf(stderr, "Is Domain %d a valid domain?\n", domid);
+ else
+ fprintf(stderr, "errno: %d\n", errno);
+ }
+
+ return rc;
+}
+
+/*
+ * Local variables:
+ * mode: C
+ * c-basic-offset: 4
+ * indent-tabs-mode: nil
+ * End:
+ */
diff --git a/tools/libxl/xl.h b/tools/libxl/xl.h
index e005c39..78738b9 100644
--- a/tools/libxl/xl.h
+++ b/tools/libxl/xl.h
@@ -105,6 +105,8 @@ int main_getenforce(int argc, char **argv);
int main_setenforce(int argc, char **argv);
int main_loadpolicy(int argc, char **argv);
int main_remus(int argc, char **argv);
+int main_pqosattach(int argc, char **argv);
+int main_pqosdetach(int argc, char **argv);
void help(const char *command);
diff --git a/tools/libxl/xl_cmdimpl.c b/tools/libxl/xl_cmdimpl.c
index 84a604f..1a12e8f 100644
--- a/tools/libxl/xl_cmdimpl.c
+++ b/tools/libxl/xl_cmdimpl.c
@@ -7195,6 +7195,42 @@ int main_remus(int argc, char **argv)
return -ERROR_FAIL;
}
+int main_pqosattach(int argc, char **argv)
+{
+ uint32_t domid;
+ int opt, rc;
+ const char *qosres = NULL;
+
+ SWITCH_FOREACH_OPT(opt, "", NULL, "pqos-attach", 2) {
+ /* No options */
+ }
+
+ qosres = argv[optind];
+ domid = find_domain(argv[optind + 1]);
+
+ rc = libxl_pqos_attach(ctx, domid, qosres);
+
+ return rc;
+}
+
+int main_pqosdetach(int argc, char **argv)
+{
+ uint32_t domid;
+ int opt, rc;
+ const char *qosres = NULL;
+
+ SWITCH_FOREACH_OPT(opt, "", NULL, "pqos-detach", 2) {
+ /* No options */
+ }
+
+ qosres = argv[optind];
+ domid = find_domain(argv[optind + 1]);
+
+ rc = libxl_pqos_detach(ctx, domid, qosres);
+
+ return rc;
+}
+
/*
* Local variables:
* mode: C
diff --git a/tools/libxl/xl_cmdtable.c b/tools/libxl/xl_cmdtable.c
index 326a660..02a2572 100644
--- a/tools/libxl/xl_cmdtable.c
+++ b/tools/libxl/xl_cmdtable.c
@@ -488,6 +488,16 @@ struct cmd_spec cmd_table[] = {
" of the domain."
},
+ { "pqos-attach",
+ &main_pqosattach, 0, 1,
+ "Allocate and map qos resource",
+ "<Resource> <Domain>",
+ },
+ { "pqos-detach",
+ &main_pqosdetach, 0, 1,
+ "Reliquish qos resource",
+ "<Resource> <Domain>",
+ },
};
int cmdtable_len = sizeof(cmd_table)/sizeof(struct cmd_spec);
--
1.7.9.5
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