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[xen staging] tools: split libxenstat into new tools/libs/stat directory

Date: Wed, 09 Sep 2020 11:14:41 +0000

Delivery-date: Wed, 09 Sep 2020 11:14:48 +0000

List-id: "Change log for Mercurial $receive only$" <xen-changelog.lists.xenproject.org>

commit 6d0ec0539077943af6d02be2adc79766c7950132 Author: Juergen Gross <jgross@xxxxxxxx> AuthorDate: Fri Aug 28 17:07:38 2020 +0200 Commit: Wei Liu <wl@xxxxxxx> CommitDate: Wed Sep 9 10:57:25 2020 +0000 tools: split libxenstat into new tools/libs/stat directory There is no reason why libxenstat is not placed in the tools/libs directory. At the same time move xenstat.h to a dedicated include directory in tools/libs/stat in order to follow the same pattern as the other libraries in tools/libs. As now xentop is the only left directory in xenstat move it directly under tools and get rid of tools/xenstat. Fix some missing prototype errors (add one prototype and make two functions static). Signed-off-by: Juergen Gross <jgross@xxxxxxxx> Acked-by: Wei Liu <wl@xxxxxxx> --- .gitignore | 8 +- tools/Makefile | 2 +- tools/Rules.mk | 6 - tools/libs/Makefile | 1 + tools/libs/stat/COPYING | 509 ++++++++ tools/libs/stat/Makefile | 132 ++ tools/libs/stat/bindings/swig/perl/.empty | 1 + tools/libs/stat/bindings/swig/python/.empty | 1 + tools/libs/stat/bindings/swig/xenstat.i | 8 + tools/libs/stat/include/xenstat.h | 197 +++ tools/libs/stat/xenstat.c | 735 +++++++++++ tools/libs/stat/xenstat_freebsd.c | 47 + tools/libs/stat/xenstat_linux.c | 496 ++++++++ tools/libs/stat/xenstat_netbsd.c | 97 ++ tools/libs/stat/xenstat_priv.h | 108 ++ tools/libs/stat/xenstat_qmp.c | 446 +++++++ tools/libs/stat/xenstat_solaris.c | 405 ++++++ tools/libs/uselibs.mk | 2 + tools/xenstat/Makefile | 10 - tools/xenstat/libxenstat/COPYING | 509 -------- tools/xenstat/libxenstat/Makefile | 195 --- tools/xenstat/libxenstat/bindings/swig/perl/.empty | 1 - .../xenstat/libxenstat/bindings/swig/python/.empty | 1 - tools/xenstat/libxenstat/bindings/swig/xenstat.i | 8 - tools/xenstat/libxenstat/src/xenstat.c | 735 ----------- tools/xenstat/libxenstat/src/xenstat.h | 194 --- tools/xenstat/libxenstat/src/xenstat_freebsd.c | 47 - tools/xenstat/libxenstat/src/xenstat_linux.c | 496 -------- tools/xenstat/libxenstat/src/xenstat_netbsd.c | 97 -- tools/xenstat/libxenstat/src/xenstat_priv.h | 108 -- tools/xenstat/libxenstat/src/xenstat_qmp.c | 446 ------- tools/xenstat/libxenstat/src/xenstat_solaris.c | 405 ------ tools/xenstat/xentop/Makefile | 50 - tools/xenstat/xentop/TODO | 34 - tools/xenstat/xentop/xentop.c | 1346 -------------------- tools/xentop/Makefile | 50 + tools/xentop/TODO | 34 + tools/xentop/xentop.c | 1346 ++++++++++++++++++++ 38 files changed, 4621 insertions(+), 4692 deletions(-) diff --git a/.gitignore b/.gitignore index 364b09506b..5e8c47e2db 100644 --- a/.gitignore +++ b/.gitignore @@ -128,6 +128,10 @@ tools/libs/guest/xc_core.h tools/libs/guest/xc_core_arm.h tools/libs/guest/xc_core_x86.h tools/libs/guest/xc_private.h +tools/libs/stat/_paths.h +tools/libs/stat/headers.chk +tools/libs/stat/libxenstat.map +tools/libs/stat/xenstat.pc tools/libs/store/headers.chk tools/libs/store/list.h tools/libs/store/utils.h @@ -276,9 +280,6 @@ tools/xenmon/xentrace_setmask tools/xenmon/xenbaked tools/xenpaging/xenpaging tools/xenpmd/xenpmd -tools/xenstat/libxenstat/src/_paths.h -tools/xenstat/libxenstat/xenstat.pc -tools/xenstat/xentop/xentop tools/xenstore/xenstore tools/xenstore/xenstore-chmod tools/xenstore/xenstore-exists @@ -291,6 +292,7 @@ tools/xenstore/xenstore-ls tools/xenstore/xenstored tools/xenstore/xenstored_test tools/xenstore/xs_tdb_dump +tools/xentop/xentop tools/xentrace/xentrace_setsize tools/xentrace/tbctl tools/xentrace/xenctx diff --git a/tools/Makefile b/tools/Makefile index 0db01707a4..ea69675cca 100644 --- a/tools/Makefile +++ b/tools/Makefile @@ -17,7 +17,7 @@ SUBDIRS-$(CONFIG_XCUTILS) += xcutils SUBDIRS-$(CONFIG_X86) += firmware SUBDIRS-y += console SUBDIRS-y += xenmon -SUBDIRS-y += xenstat +SUBDIRS-y += xentop SUBDIRS-$(CONFIG_NetBSD) += xenbackendd SUBDIRS-y += libfsimage SUBDIRS-$(CONFIG_Linux) += vchan diff --git a/tools/Rules.mk b/tools/Rules.mk index 5f17492a68..4fd91fa444 100644 --- a/tools/Rules.mk +++ b/tools/Rules.mk @@ -18,7 +18,6 @@ include $(XEN_ROOT)/tools/libs/uselibs.mk XEN_libxenlight = $(XEN_ROOT)/tools/libxl # Currently libxlutil lives in the same directory as libxenlight XEN_libxlutil = $(XEN_libxenlight) -XEN_libxenstat = $(XEN_ROOT)/tools/xenstat/libxenstat/src CFLAGS_xeninclude = -I$(XEN_INCLUDE) @@ -108,11 +107,6 @@ ifeq ($(CONFIG_Linux),y) LDLIBS_libxenstore += -ldl endif -CFLAGS_libxenstat = -I$(XEN_libxenstat) -SHDEPS_libxenstat = $(SHLIB_libxenctrl) $(SHLIB_libxenstore) -LDLIBS_libxenstat = $(SHDEPS_libxenstat) $(XEN_libxenstat)/libxenstat$(libextension) -SHLIB_libxenstat = $(SHDEPS_libxenstat) -Wl,-rpath-link=$(XEN_libxenstat) - ifeq ($(debug),y) # Disable optimizations CFLAGS += -O0 -fno-omit-frame-pointer diff --git a/tools/libs/Makefile b/tools/libs/Makefile index 756d059ee7..e8fcd59214 100644 --- a/tools/libs/Makefile +++ b/tools/libs/Makefile @@ -13,6 +13,7 @@ SUBDIRS-y += ctrl SUBDIRS-y += guest SUBDIRS-y += hypfs SUBDIRS-y += store +SUBDIRS-y += stat SUBDIRS-$(CONFIG_Linux) += vchan ifeq ($(CONFIG_RUMP),y) diff --git a/tools/libs/stat/COPYING b/tools/libs/stat/COPYING new file mode 100644 index 0000000000..480e5f1876 --- /dev/null +++ b/tools/libs/stat/COPYING @@ -0,0 +1,509 @@ + + GNU LESSER GENERAL PUBLIC LICENSE + Version 2.1, February 1999 + + Copyright (C) 1991, 1999 Free Software Foundation, Inc. + 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + +[This is the first released version of the Lesser GPL. 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Here is a sample; alter the names: + + Yoyodyne, Inc., hereby disclaims all copyright interest in the + library `Frob' (a library for tweaking knobs) written by James + Random Hacker. + + <signature of Ty Coon>, 1 April 1990 + Ty Coon, President of Vice + +That's all there is to it! + + diff --git a/tools/libs/stat/Makefile b/tools/libs/stat/Makefile new file mode 100644 index 0000000000..5463f5f7ca --- /dev/null +++ b/tools/libs/stat/Makefile @@ -0,0 +1,132 @@ +# libxenstat: statistics-collection library for Xen +# Copyright (C) International Business Machines Corp., 2005 +# Author: Josh Triplett <josh@xxxxxxxxxx> +# +# This library is free software; you can redistribute it and/or +# modify it under the terms of the GNU Lesser General Public +# License as published by the Free Software Foundation; either +# version 2.1 of the License, or (at your option) any later version. +# +# This library is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +# Lesser General Public License for more details. + +XEN_ROOT=$(CURDIR)/../../.. +include $(XEN_ROOT)/tools/Rules.mk + +CFLAGS += $(CFLAGS_libxenctrl) $(CFLAGS_libxenstore) $(CFLAGS_xeninclude) -include $(XEN_ROOT)/tools/config.h + +SRCS-y += xenstat.c +SRCS-y += xenstat_qmp.c +SRCS-$(CONFIG_Linux) += xenstat_linux.c +SRCS-$(CONFIG_SunOS) += xenstat_solaris.c +SRCS-$(CONFIG_NetBSD) += xenstat_netbsd.c +SRCS-$(CONFIG_FreeBSD) += xenstat_freebsd.c + +LDLIBS-y += -lyajl +LDLIBS-$(CONFIG_SunOS) += -lkstat +APPEND_LDFLAGS += $(LDLIBS-y) + +include $(XEN_ROOT)/tools/libs/libs.mk + +$(PKG_CONFIG_LOCAL): PKG_CONFIG_INCDIR = $(XEN_libxenstat)/include + +$(LIB_OBJS): _paths.h + +PYLIB=bindings/swig/python/_xenstat.so +PYMOD=bindings/swig/python/xenstat.py +PYSRC=bindings/swig/python/_xenstat.c +PERLLIB=bindings/swig/perl/xenstat.so +PERLMOD=bindings/swig/perl/xenstat.pm +PERLSRC=bindings/swig/perl/xenstat.c +BINDINGS=$(PYLIB) $(PYMOD) $(PERLLIB) $(PERLMOD) +BINDINGSRC=$(PYSRC) $(PERLSRC) + +# The all-bindings target builds all the language bindings +.PHONY: all-bindings +all-bindings: perl-bindings python-bindings + +# The install-bindings target installs all the language bindings +install-bindings: install-perl-bindings install-python-bindings + +.PHONY: uninstall-bindings +uninstall-bindings: uninstall-perl-bindings uninstall-python-bindings + +$(BINDINGS): $(SHLIB) $(SHLIB_LINKS) include/xenstat.h + +SWIG_FLAGS=-module xenstat -Iinclude -I. + +# Python bindings +PYTHON_VERSION=$(PYTHON:python%=%) +PYTHON_FLAGS=-I/usr/include/python$(PYTHON_VERSION) -lpython$(PYTHON_VERSION) +$(PYMOD): $(PYSRC) +$(PYSRC): bindings/swig/xenstat.i + swig -python $(SWIG_FLAGS) -outdir $(@D) -o $(PYSRC) $< + +$(PYLIB): $(PYSRC) + $(CC) $(CFLAGS) $(LDFLAGS) $(PYTHON_FLAGS) $(SHLIB_LDFLAGS) -lxenstat -o $@ $< $(APPEND_LDFLAGS) + +python-bindings: $(PYLIB) $(PYMOD) + +pythonlibdir=$(prefix)/lib/python$(PYTHON_VERSION)/site-packages +install-python-bindings: $(PYLIB) $(PYMOD) + $(INSTALL_PROG) $(PYLIB) $(DESTDIR)$(pythonlibdir)/_xenstat.so + $(INSTALL_PROG) $(PYMOD) $(DESTDIR)$(pythonlibdir)/xenstat.py + +.PHONY: uninstall-python-bindings +uninstall-python-bindings: + rm -f $(DESTDIR)$(pythonlibdir)/_xenstat.so + rm -f $(DESTDIR)$(pythonlibdir)/xenstat.py + +ifeq ($(XENSTAT_PYTHON_BINDINGS),y) +.PHONY: all +all: python-bindings +install: install-python-bindings +uninstall: uninstall-python-bindings +endif + +# Perl bindings +PERL_FLAGS=`perl -MConfig -e 'print "$$Config{ccflags} -I$$Config{archlib}/CORE";'` +$(PERLMOD): $(PERLSRC) +$(PERLSRC): bindings/swig/xenstat.i + swig -perl $(SWIG_FLAGS) -outdir $(@D) -o $(PERLSRC) $< + +$(PERLLIB): $(PERLSRC) + $(CC) $(CFLAGS) $(LDFLAGS) $(PERL_FLAGS) $(SHLIB_LDFLAGS) -lxenstat -o $@ $< $(APPEND_LDFLAGS) + +.PHONY: perl-bindings +perl-bindings: $(PERLLIB) $(PERLMOD) + +.PHONY: install-perl-bindings +perllibdir=$(prefix)/lib/perl5 +perlmoddir=$(prefix)/share/perl5 +install-perl-bindings: $(PERLLIB) $(PERLMOD) + $(INSTALL_PROG) $(PERLLIB) $(DESTDIR)$(perllibdir)/xenstat.so + $(INSTALL_PROG) $(PERLMOD) $(DESTDIR)$(perlmoddir)/xenstat.pm + +.PHONY: uninstall-perl-bindings +uninstall-perl-bindings: + rm -f $(DESTDIR)$(perllibdir)/xenstat.so + rm -f $(DESTDIR)$(perlmoddir)/xenstat.pm + +ifeq ($(XENSTAT_PERL_BINDINGS),y) +.PHONY: all +all: perl-bindings + +.PHONY: install +install: install-perl-bindings +uninstall: uninstall-perl-bindings +endif + +clean: cleanlocal + +.PHONY: cleanlocal +cleanlocal: + rm -f $(BINDINGS) $(BINDINGSRC) $(DEPS_RM) _paths.h + rm -f libxenstat.map + +-include $(DEPS_INCLUDE) + +genpath-target = $(call buildmakevars2header,_paths.h) +$(eval $(genpath-target)) diff --git a/tools/libs/stat/bindings/swig/perl/.empty b/tools/libs/stat/bindings/swig/perl/.empty new file mode 100644 index 0000000000..2a8dd4274d --- /dev/null +++ b/tools/libs/stat/bindings/swig/perl/.empty @@ -0,0 +1 @@ +This directory is empty; this file is included to prevent version control systems from removing the directory. diff --git a/tools/libs/stat/bindings/swig/python/.empty b/tools/libs/stat/bindings/swig/python/.empty new file mode 100644 index 0000000000..2a8dd4274d --- /dev/null +++ b/tools/libs/stat/bindings/swig/python/.empty @@ -0,0 +1 @@ +This directory is empty; this file is included to prevent version control systems from removing the directory. diff --git a/tools/libs/stat/bindings/swig/xenstat.i b/tools/libs/stat/bindings/swig/xenstat.i new file mode 100644 index 0000000000..d18fe0b155 --- /dev/null +++ b/tools/libs/stat/bindings/swig/xenstat.i @@ -0,0 +1,8 @@ +%module xenstat_swig +%{ +/* Includes the header in the wrapper code */ +#include "xenstat.h" +%} + +/* Parse the header file to generate wrappers */ +%include "xenstat.h" diff --git a/tools/libs/stat/include/xenstat.h b/tools/libs/stat/include/xenstat.h new file mode 100644 index 0000000000..c3b98909dd --- /dev/null +++ b/tools/libs/stat/include/xenstat.h @@ -0,0 +1,197 @@ +/* libxenstat: statistics-collection library for Xen + * Copyright (C) International Business Machines Corp., 2005 + * Authors: Josh Triplett <josh@xxxxxxxxxx> + * Judy Fischbach <jfisch@xxxxxxxxxx> + * David Hendricks <cro_marmot@xxxxxxxxxxx> + * + * This library 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; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library 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. + */ + +/* libxenstat API */ + +#ifndef XENSTAT_H +#define XENSTAT_H + +#include <stdbool.h> + +/* Opaque handles */ +typedef struct xenstat_handle xenstat_handle; +typedef struct xenstat_domain xenstat_domain; +typedef struct xenstat_node xenstat_node; +typedef struct xenstat_vcpu xenstat_vcpu; +typedef struct xenstat_network xenstat_network; +typedef struct xenstat_vbd xenstat_vbd; + +/* Initialize the xenstat library. Returns a handle to be used with + * subsequent calls to the xenstat library, or NULL if an error occurs. */ +xenstat_handle *xenstat_init(void); + +/* Release the handle to libxc, free resources, etc. */ +void xenstat_uninit(xenstat_handle * handle); + +/* Flags for types of information to collect in xenstat_get_node */ +#define XENSTAT_VCPU 0x1 +#define XENSTAT_NETWORK 0x2 +#define XENSTAT_XEN_VERSION 0x4 +#define XENSTAT_VBD 0x8 +#define XENSTAT_ALL (XENSTAT_VCPU|XENSTAT_NETWORK|XENSTAT_XEN_VERSION|XENSTAT_VBD) + +/* Get all available information about a node */ +xenstat_node *xenstat_get_node(xenstat_handle * handle, unsigned int flags); + +/* Free the information */ +void xenstat_free_node(xenstat_node * node); + +/* + * Node functions - extract information from a xenstat_node + */ + +/* Get information about the domain with the given domain ID */ +xenstat_domain *xenstat_node_domain(xenstat_node * node, + unsigned int domid); + +/* Get the domain with the given index; used to loop over all domains. */ +xenstat_domain *xenstat_node_domain_by_index(xenstat_node * node, + unsigned index); + +/* Get xen version of the node */ +const char *xenstat_node_xen_version(xenstat_node * node); + +/* Get amount of total memory on a node */ +unsigned long long xenstat_node_tot_mem(xenstat_node * node); + +/* Get amount of free memory on a node */ +unsigned long long xenstat_node_free_mem(xenstat_node * node); + +/* Get amount of freeable memory on a node */ +long xenstat_node_freeable_mb(xenstat_node * node); + +/* Find the number of domains existing on a node */ +unsigned int xenstat_node_num_domains(xenstat_node * node); + +/* Find the number of CPUs existing on a node */ +unsigned int xenstat_node_num_cpus(xenstat_node * node); + +/* Get information about the CPU speed */ +unsigned long long xenstat_node_cpu_hz(xenstat_node * node); + +/* + * Domain functions - extract information from a xenstat_domain + */ + +/* Get the domain ID for this domain */ +unsigned xenstat_domain_id(xenstat_domain * domain); + +/* Set the domain name for the domain */ +char *xenstat_domain_name(xenstat_domain * domain); + +/* Get information about how much CPU time has been used */ +unsigned long long xenstat_domain_cpu_ns(xenstat_domain * domain); + +/* Find the number of VCPUs allocated to a domain */ +unsigned int xenstat_domain_num_vcpus(xenstat_domain * domain); + +/* Get the VCPU handle to obtain VCPU stats */ +xenstat_vcpu *xenstat_domain_vcpu(xenstat_domain * domain, + unsigned int vcpu); + +/* Find the current memory reservation for this domain */ +unsigned long long xenstat_domain_cur_mem(xenstat_domain * domain); + +/* Find the maximum memory reservation for this domain */ +unsigned long long xenstat_domain_max_mem(xenstat_domain * domain); + +/* Find the domain's SSID */ +unsigned int xenstat_domain_ssid(xenstat_domain * domain); + +/* Get domain states */ +unsigned int xenstat_domain_dying(xenstat_domain * domain); +unsigned int xenstat_domain_crashed(xenstat_domain * domain); +unsigned int xenstat_domain_shutdown(xenstat_domain * domain); +unsigned int xenstat_domain_paused(xenstat_domain * domain); +unsigned int xenstat_domain_blocked(xenstat_domain * domain); +unsigned int xenstat_domain_running(xenstat_domain * domain); + +/* Get the number of networks for a given domain */ +unsigned int xenstat_domain_num_networks(xenstat_domain *); + +/* Get the network handle to obtain network stats */ +xenstat_network *xenstat_domain_network(xenstat_domain * domain, + unsigned int network); + +/* Get the number of VBDs for a given domain */ +unsigned int xenstat_domain_num_vbds(xenstat_domain *); + +/* Get the VBD handle to obtain VBD stats */ +xenstat_vbd *xenstat_domain_vbd(xenstat_domain * domain, + unsigned int vbd); + +/* + * VCPU functions - extract information from a xenstat_vcpu + */ + +/* Get VCPU usage */ +unsigned int xenstat_vcpu_online(xenstat_vcpu * vcpu); +unsigned long long xenstat_vcpu_ns(xenstat_vcpu * vcpu); + + +/* + * Network functions - extract information from a xenstat_network + */ + +/* Get the ID for this network */ +unsigned int xenstat_network_id(xenstat_network * network); + +/* Get the number of receive bytes for this network */ +unsigned long long xenstat_network_rbytes(xenstat_network * network); + +/* Get the number of receive packets for this network */ +unsigned long long xenstat_network_rpackets(xenstat_network * network); + +/* Get the number of receive errors for this network */ +unsigned long long xenstat_network_rerrs(xenstat_network * network); + +/* Get the number of receive drops for this network */ +unsigned long long xenstat_network_rdrop(xenstat_network * network); + +/* Get the number of transmit bytes for this network */ +unsigned long long xenstat_network_tbytes(xenstat_network * network); + +/* Get the number of transmit packets for this network */ +unsigned long long xenstat_network_tpackets(xenstat_network * network); + +/* Get the number of transmit errors for this network */ +unsigned long long xenstat_network_terrs(xenstat_network * network); + +/* Get the number of transmit drops for this network */ +unsigned long long xenstat_network_tdrop(xenstat_network * network); + +/* + * VBD functions - extract information from a xen_vbd + */ + +/* Get the back driver type for Virtual Block Device */ +unsigned int xenstat_vbd_type(xenstat_vbd * vbd); + +/* Get the device number for Virtual Block Device */ +unsigned int xenstat_vbd_dev(xenstat_vbd * vbd); + +/* Get the number of OO/RD/WR requests for vbd */ +unsigned long long xenstat_vbd_oo_reqs(xenstat_vbd * vbd); +unsigned long long xenstat_vbd_rd_reqs(xenstat_vbd * vbd); +unsigned long long xenstat_vbd_wr_reqs(xenstat_vbd * vbd); +unsigned long long xenstat_vbd_rd_sects(xenstat_vbd * vbd); +unsigned long long xenstat_vbd_wr_sects(xenstat_vbd * vbd); + +/* Returns error while getting stats (1 if error happened, 0 otherwise) */ +bool xenstat_vbd_error(xenstat_vbd * vbd); + +#endif /* XENSTAT_H */ diff --git a/tools/libs/stat/xenstat.c b/tools/libs/stat/xenstat.c new file mode 100644 index 0000000000..6f93d4e982 --- /dev/null +++ b/tools/libs/stat/xenstat.c @@ -0,0 +1,735 @@ +/* libxenstat: statistics-collection library for Xen + * Copyright (C) International Business Machines Corp., 2005 + * Authors: Josh Triplett <josh@xxxxxxxxxx> + * Judy Fischbach <jfisch@xxxxxxxxxx> + * David Hendricks <cro_marmot@xxxxxxxxxxx> + * + * This library 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; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library 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. + */ + +/* + * Copyright 2007 Sun Microsystems, Inc. All rights reserved. + * Use is subject to license terms. + */ + +#include <stdlib.h> +#include <string.h> +#include <stdio.h> +#include <unistd.h> + +#include "xenstat_priv.h" + +/* + * Data-collection types + */ +/* Called to collect the information for the node and all the domains on + * it. When called, the domain information has already been collected. + * Return status is 0 if fatal error occurs, 1 for success. Collectors + * may prune a domain from the list if it has been deleted between the + * time the list was setup and the time the colector is called */ +typedef int (*xenstat_collect_func)(xenstat_node * node); +/* Called to free the information collected by the collect function. The free + * function will only be called on a xenstat_node if that node includes + * information collected by the corresponding collector. */ +typedef void (*xenstat_free_func)(xenstat_node * node); +/* Called to free any information stored in the handle. Note the lack of a + * matching init function; the collect functions should initialize on first + * use. Also, the uninit function must handle the case that the collector has + * never been initialized. */ +typedef void (*xenstat_uninit_func)(xenstat_handle * handle); +typedef struct xenstat_collector { + unsigned int flag; + xenstat_collect_func collect; + xenstat_free_func free; + xenstat_uninit_func uninit; +} xenstat_collector; + +static int xenstat_collect_vcpus(xenstat_node * node); +static int xenstat_collect_xen_version(xenstat_node * node); +static void xenstat_free_vcpus(xenstat_node * node); +static void xenstat_free_networks(xenstat_node * node); +static void xenstat_free_xen_version(xenstat_node * node); +static void xenstat_free_vbds(xenstat_node * node); +static void xenstat_uninit_vcpus(xenstat_handle * handle); +static void xenstat_uninit_xen_version(xenstat_handle * handle); +static char *xenstat_get_domain_name(xenstat_handle * handle, unsigned int domain_id); +static void xenstat_prune_domain(xenstat_node *node, unsigned int entry); + +static xenstat_collector collectors[] = { + { XENSTAT_VCPU, xenstat_collect_vcpus, + xenstat_free_vcpus, xenstat_uninit_vcpus }, + { XENSTAT_NETWORK, xenstat_collect_networks, + xenstat_free_networks, xenstat_uninit_networks }, + { XENSTAT_XEN_VERSION, xenstat_collect_xen_version, + xenstat_free_xen_version, xenstat_uninit_xen_version }, + { XENSTAT_VBD, xenstat_collect_vbds, + xenstat_free_vbds, xenstat_uninit_vbds } +}; + +#define NUM_COLLECTORS (sizeof(collectors)/sizeof(xenstat_collector)) + +/* + * libxenstat API + */ +xenstat_handle *xenstat_init(void) +{ + xenstat_handle *handle; + + handle = (xenstat_handle *) calloc(1, sizeof(xenstat_handle)); + if (handle == NULL) + return NULL; + +#if defined(PAGESIZE) + handle->page_size = PAGESIZE; +#elif defined(PAGE_SIZE) + handle->page_size = PAGE_SIZE; +#else + handle->page_size = sysconf(_SC_PAGE_SIZE); + if (handle->page_size < 0) { + perror("Failed to retrieve page size."); + free(handle); + return NULL; + } +#endif + + handle->xc_handle = xc_interface_open(0,0,0); + if (!handle->xc_handle) { + perror("xc_interface_open"); + free(handle); + return NULL; + } + + handle->xshandle = xs_daemon_open_readonly(); /* open handle to xenstore*/ + if (handle->xshandle == NULL) { + perror("unable to open xenstore"); + xc_interface_close(handle->xc_handle); + free(handle); + return NULL; + } + + return handle; +} + +void xenstat_uninit(xenstat_handle * handle) +{ + unsigned int i; + if (handle) { + for (i = 0; i < NUM_COLLECTORS; i++) + collectors[i].uninit(handle); + xc_interface_close(handle->xc_handle); + xs_daemon_close(handle->xshandle); + free(handle->priv); + free(handle); + } +} + +xenstat_node *xenstat_get_node(xenstat_handle * handle, unsigned int flags) +{ +#define DOMAIN_CHUNK_SIZE 256 + xenstat_node *node; + xc_physinfo_t physinfo = { 0 }; + xc_domaininfo_t domaininfo[DOMAIN_CHUNK_SIZE]; + int new_domains; + unsigned int i; + + /* Create the node */ + node = (xenstat_node *) calloc(1, sizeof(xenstat_node)); + if (node == NULL) + return NULL; + + /* Store the handle in the node for later access */ + node->handle = handle; + + /* Get information about the physical system */ + if (xc_physinfo(handle->xc_handle, &physinfo) < 0) { + free(node); + return NULL; + } + + + node->cpu_hz = ((unsigned long long)physinfo.cpu_khz) * 1000ULL; + node->num_cpus = physinfo.nr_cpus; + node->tot_mem = ((unsigned long long)physinfo.total_pages) + * handle->page_size; + node->free_mem = ((unsigned long long)physinfo.free_pages) + * handle->page_size; + + node->freeable_mb = 0; + /* malloc(0) is not portable, so allocate a single domain. This will + * be resized below. */ + node->domains = malloc(sizeof(xenstat_domain)); + if (node->domains == NULL) { + free(node); + return NULL; + } + + node->num_domains = 0; + do { + xenstat_domain *domain, *tmp; + + new_domains = xc_domain_getinfolist(handle->xc_handle, + node->num_domains, + DOMAIN_CHUNK_SIZE, + domaininfo); + if (new_domains < 0) + goto err; + + tmp = realloc(node->domains, + (node->num_domains + new_domains) + * sizeof(xenstat_domain)); + if (tmp == NULL) + goto err; + + node->domains = tmp; + + domain = node->domains + node->num_domains; + + /* zero out newly allocated memory in case error occurs below */ + memset(domain, 0, new_domains * sizeof(xenstat_domain)); + + for (i = 0; i < new_domains; i++) { + /* Fill in domain using domaininfo[i] */ + domain->id = domaininfo[i].domain; + domain->name = xenstat_get_domain_name(handle, + domain->id); + if (domain->name == NULL) { + if (errno == ENOMEM) { + /* fatal error */ + xenstat_free_node(node); + return NULL; + } + else { + /* failed to get name -- this means the + domain is being destroyed so simply + ignore this entry */ + continue; + } + } + domain->state = domaininfo[i].flags; + domain->cpu_ns = domaininfo[i].cpu_time; + domain->num_vcpus = (domaininfo[i].max_vcpu_id+1); + domain->vcpus = NULL; + domain->cur_mem = + ((unsigned long long)domaininfo[i].tot_pages) + * handle->page_size; + domain->max_mem = + domaininfo[i].max_pages == UINT_MAX + ? (unsigned long long)-1 + : (unsigned long long)(domaininfo[i].max_pages + * handle->page_size); + domain->ssid = domaininfo[i].ssidref; + domain->num_networks = 0; + domain->networks = NULL; + domain->num_vbds = 0; + domain->vbds = NULL; + + domain++; + node->num_domains++; + } + } while (new_domains == DOMAIN_CHUNK_SIZE); + + + /* Run all the extra data collectors requested */ + node->flags = 0; + for (i = 0; i < NUM_COLLECTORS; i++) { + if ((flags & collectors[i].flag) == collectors[i].flag) { + node->flags |= collectors[i].flag; + if(collectors[i].collect(node) == 0) { + xenstat_free_node(node); + return NULL; + } + } + } + + return node; +err: + free(node->domains); + free(node); + return NULL; +} + +void xenstat_free_node(xenstat_node * node) +{ + int i; + + if (node) { + if (node->domains) { + for (i = 0; i < node->num_domains; i++) + free(node->domains[i].name); + + for (i = 0; i < NUM_COLLECTORS; i++) + if((node->flags & collectors[i].flag) + == collectors[i].flag) + collectors[i].free(node); + free(node->domains); + } + free(node); + } +} + +xenstat_domain *xenstat_node_domain(xenstat_node * node, unsigned int domid) +{ + unsigned int i; + + /* FIXME: binary search */ + /* Find the appropriate domain entry in the node struct. */ + for (i = 0; i < node->num_domains; i++) { + if (node->domains[i].id == domid) + return &(node->domains[i]); + } + return NULL; +} + +xenstat_domain *xenstat_node_domain_by_index(xenstat_node * node, + unsigned int index) +{ + if (index < node->num_domains) + return &(node->domains[index]); + return NULL; +} + +const char *xenstat_node_xen_version(xenstat_node * node) +{ + return node->handle->xen_version; +} + +unsigned long long xenstat_node_tot_mem(xenstat_node * node) +{ + return node->tot_mem; +} + +unsigned long long xenstat_node_free_mem(xenstat_node * node) +{ + return node->free_mem; +} + +long xenstat_node_freeable_mb(xenstat_node * node) +{ + return node->freeable_mb; +} + +unsigned int xenstat_node_num_domains(xenstat_node * node) +{ + return node->num_domains; +} + +unsigned int xenstat_node_num_cpus(xenstat_node * node) +{ + return node->num_cpus; +} + +/* Get information about the CPU speed */ +unsigned long long xenstat_node_cpu_hz(xenstat_node * node) +{ + return node->cpu_hz; +} + +/* Get the domain ID for this domain */ +unsigned xenstat_domain_id(xenstat_domain * domain) +{ + return domain->id; +} + +/* Get the domain name for the domain */ +char *xenstat_domain_name(xenstat_domain * domain) +{ + return domain->name; +} + +/* Get information about how much CPU time has been used */ +unsigned long long xenstat_domain_cpu_ns(xenstat_domain * domain) +{ + return domain->cpu_ns; +} + +/* Find the number of VCPUs for a domain */ +unsigned int xenstat_domain_num_vcpus(xenstat_domain * domain) +{ + return domain->num_vcpus; +} + +xenstat_vcpu *xenstat_domain_vcpu(xenstat_domain * domain, unsigned int vcpu) +{ + if (vcpu < domain->num_vcpus) + return &(domain->vcpus[vcpu]); + return NULL; +} + +/* Find the current memory reservation for this domain */ +unsigned long long xenstat_domain_cur_mem(xenstat_domain * domain) +{ + return domain->cur_mem; +} + +/* Find the maximum memory reservation for this domain */ +unsigned long long xenstat_domain_max_mem(xenstat_domain * domain) +{ + return domain->max_mem; +} + +/* Find the domain's SSID */ +unsigned int xenstat_domain_ssid(xenstat_domain * domain) +{ + return domain->ssid; +} + +/* Get domain states */ +unsigned int xenstat_domain_dying(xenstat_domain * domain) +{ + return (domain->state & XEN_DOMINF_dying) == XEN_DOMINF_dying; +} + +unsigned int xenstat_domain_crashed(xenstat_domain * domain) +{ + return ((domain->state & XEN_DOMINF_shutdown) == XEN_DOMINF_shutdown) + && (((domain->state >> XEN_DOMINF_shutdownshift) + & XEN_DOMINF_shutdownmask) == SHUTDOWN_crash); +} + +unsigned int xenstat_domain_shutdown(xenstat_domain * domain) +{ + return ((domain->state & XEN_DOMINF_shutdown) == XEN_DOMINF_shutdown) + && (((domain->state >> XEN_DOMINF_shutdownshift) + & XEN_DOMINF_shutdownmask) != SHUTDOWN_crash); +} + +unsigned int xenstat_domain_paused(xenstat_domain * domain) +{ + return (domain->state & XEN_DOMINF_paused) == XEN_DOMINF_paused; +} + +unsigned int xenstat_domain_blocked(xenstat_domain * domain) +{ + return (domain->state & XEN_DOMINF_blocked) == XEN_DOMINF_blocked; +} + +unsigned int xenstat_domain_running(xenstat_domain * domain) +{ + return (domain->state & XEN_DOMINF_running) == XEN_DOMINF_running; +} + +/* Get the number of networks for a given domain */ +unsigned int xenstat_domain_num_networks(xenstat_domain * domain) +{ + return domain->num_networks; +} + +/* Get the network handle to obtain network stats */ +xenstat_network *xenstat_domain_network(xenstat_domain * domain, + unsigned int network) +{ + if (domain->networks && network < domain->num_networks) + return &(domain->networks[network]); + return NULL; +} + +/* Get the number of VBDs for a given domain */ +unsigned int xenstat_domain_num_vbds(xenstat_domain * domain) +{ + return domain->num_vbds; +} + +/* Get the VBD handle to obtain VBD stats */ +xenstat_vbd *xenstat_domain_vbd(xenstat_domain * domain, + unsigned int vbd) +{ + if (domain->vbds && vbd < domain->num_vbds) + return &(domain->vbds[vbd]); + return NULL; +} + +/* + * VCPU functions + */ +/* Collect information about VCPUs */ +static int xenstat_collect_vcpus(xenstat_node * node) +{ + unsigned int i, vcpu, inc_index; + + /* Fill in VCPU information */ + for (i = 0; i < node->num_domains; i+=inc_index) { + inc_index = 1; /* default is to increment to next domain */ + + node->domains[i].vcpus = malloc(node->domains[i].num_vcpus + * sizeof(xenstat_vcpu)); + if (node->domains[i].vcpus == NULL) + return 0; + + for (vcpu = 0; vcpu < node->domains[i].num_vcpus; vcpu++) { + /* FIXME: need to be using a more efficient mechanism*/ + xc_vcpuinfo_t info; + + if (xc_vcpu_getinfo(node->handle->xc_handle, + node->domains[i].id, vcpu, &info) != 0) { + if (errno == ENOMEM) { + /* fatal error */ + return 0; + } + else { + /* domain is in transition - remove + from list */ + xenstat_prune_domain(node, i); + + /* remember not to increment index! */ + inc_index = 0; + break; + } + } + else { + node->domains[i].vcpus[vcpu].online = info.online; + node->domains[i].vcpus[vcpu].ns = info.cpu_time; + } + } + } + return 1; +} + +/* Free VCPU information */ +static void xenstat_free_vcpus(xenstat_node * node) +{ + unsigned int i; + for (i = 0; i < node->num_domains; i++) + free(node->domains[i].vcpus); +} + +/* Free VCPU information in handle - nothing to do */ +static void xenstat_uninit_vcpus(xenstat_handle * handle) +{ +} + +/* Get VCPU online status */ +unsigned int xenstat_vcpu_online(xenstat_vcpu * vcpu) +{ + return vcpu->online; +} + +/* Get VCPU usage */ +unsigned long long xenstat_vcpu_ns(xenstat_vcpu * vcpu) +{ + return vcpu->ns; +} + +/* + * Network functions + */ + +/* Free network information */ +static void xenstat_free_networks(xenstat_node * node) +{ + unsigned int i; + for (i = 0; i < node->num_domains; i++) + free(node->domains[i].networks); +} + +/* Get the network ID */ +unsigned int xenstat_network_id(xenstat_network * network) +{ + return network->id; +} + +/* Get the number of receive bytes */ +unsigned long long xenstat_network_rbytes(xenstat_network * network) +{ + return network->rbytes; +} + +/* Get the number of receive packets */ +unsigned long long xenstat_network_rpackets(xenstat_network * network) +{ + return network->rpackets; +} + +/* Get the number of receive errors */ +unsigned long long xenstat_network_rerrs(xenstat_network * network) +{ + return network->rerrs; +} + +/* Get the number of receive drops */ +unsigned long long xenstat_network_rdrop(xenstat_network * network) +{ + return network->rdrop; +} + +/* Get the number of transmit bytes */ +unsigned long long xenstat_network_tbytes(xenstat_network * network) +{ + return network->tbytes; +} + +/* Get the number of transmit packets */ +unsigned long long xenstat_network_tpackets(xenstat_network * network) +{ + return network->tpackets; +} + +/* Get the number of transmit errors */ +unsigned long long xenstat_network_terrs(xenstat_network * network) +{ + return network->terrs; +} + +/* Get the number of transmit dropped packets */ +unsigned long long xenstat_network_tdrop(xenstat_network * network) +{ + return network->tdrop; +} + +/* + * Xen version functions + */ + +/* Collect Xen version information */ +static int xenstat_collect_xen_version(xenstat_node * node) +{ + long vnum = 0; + xen_extraversion_t version; + + /* Collect Xen version information if not already collected */ + if (node->handle->xen_version[0] == '\0') { + /* Get the Xen version number and extraversion string */ + vnum = xc_version(node->handle->xc_handle, + XENVER_version, NULL); + + if (vnum < 0) + return 0; + + if (xc_version(node->handle->xc_handle, XENVER_extraversion, + &version) < 0) + return 0; + /* Format the version information as a string and store it */ + snprintf(node->handle->xen_version, VERSION_SIZE, "%ld.%ld%s", + ((vnum >> 16) & 0xFFFF), vnum & 0xFFFF, version); + } + + return 1; +} + +/* Free Xen version information in node - nothing to do */ +static void xenstat_free_xen_version(xenstat_node * node) +{ +} + +/* Free Xen version information in handle - nothing to do */ +static void xenstat_uninit_xen_version(xenstat_handle * handle) +{ +} + +/* + * VBD functions + */ + +/* Save VBD information */ +xenstat_vbd *xenstat_save_vbd(xenstat_domain *domain, xenstat_vbd *vbd) +{ + xenstat_vbd *vbds = domain->vbds; + + domain->num_vbds++; + domain->vbds = realloc(domain->vbds, + domain->num_vbds * + sizeof(xenstat_vbd)); + + if (domain->vbds == NULL) { + domain->num_vbds = 0; + free(vbds); + } + else { + domain->vbds[domain->num_vbds - 1] = *vbd; + } + + return domain->vbds; +} + +/* Free VBD information */ +static void xenstat_free_vbds(xenstat_node * node) +{ + unsigned int i; + for (i = 0; i < node->num_domains; i++) + free(node->domains[i].vbds); +} + +/* Get the back driver type for Virtual Block Device */ +unsigned int xenstat_vbd_type(xenstat_vbd * vbd) +{ + return vbd->back_type; +} + +/* Get the major number of VBD device */ +unsigned int xenstat_vbd_dev(xenstat_vbd * vbd) +{ + return vbd->dev; +} + +/* Get the number of OO(Out of) requests */ +unsigned long long xenstat_vbd_oo_reqs(xenstat_vbd * vbd) +{ + return vbd->oo_reqs; +} + +/* Get the number of READ requests */ +unsigned long long xenstat_vbd_rd_reqs(xenstat_vbd * vbd) +{ + return vbd->rd_reqs; +} + +/* Get the number of WRITE requests */ +unsigned long long xenstat_vbd_wr_reqs(xenstat_vbd * vbd) +{ + return vbd->wr_reqs; +} + +/* Get the number of READ sectors */ +unsigned long long xenstat_vbd_rd_sects(xenstat_vbd * vbd) +{ + return vbd->rd_sects; +} + +/* Get the number of WRITE sectors */ +unsigned long long xenstat_vbd_wr_sects(xenstat_vbd * vbd) +{ + return vbd->wr_sects; +} + +/* Returns error while getting stats (1 if error happened, 0 otherwise) */ +bool xenstat_vbd_error(xenstat_vbd * vbd) +{ + return vbd->error; +} + +static char *xenstat_get_domain_name(xenstat_handle *handle, unsigned int domain_id) +{ + char path[80]; + + snprintf(path, sizeof(path),"/local/domain/%i/name", domain_id); + + return xs_read(handle->xshandle, XBT_NULL, path, NULL); +} + +/* Remove specified entry from list of domains */ +static void xenstat_prune_domain(xenstat_node *node, unsigned int entry) +{ + /* nothing to do if array is empty or entry is beyond end */ + if (node->num_domains == 0 || entry >= node->num_domains) + return; + + /* decrement count of domains */ + node->num_domains--; + + /* shift entries following specified entry up by one */ + if (entry < node->num_domains) { + xenstat_domain *domain = &node->domains[entry]; + memmove(domain,domain+1,(node->num_domains - entry) * sizeof(xenstat_domain) ); + } + + /* zero out original last entry from node -- not + strictly necessary but safer! */ + memset(&node->domains[node->num_domains], 0, sizeof(xenstat_domain)); +} diff --git a/tools/libs/stat/xenstat_freebsd.c b/tools/libs/stat/xenstat_freebsd.c new file mode 100644 index 0000000000..0c488dffac --- /dev/null +++ b/tools/libs/stat/xenstat_freebsd.c @@ -0,0 +1,47 @@ +/* libxenstat: statistics-collection library for Xen + * Copyright (C) International Business Machines Corp., 2005 + * Authors: Josh Triplett <josht@xxxxxxxxxx> + * Judy Fischbach <jfisch@xxxxxxxxxx> + * David Hendricks <dhendrix@xxxxxxxxxx> + * + * This library 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; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library 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. + */ + +/* + * Copyright 2007 Sun Microsystems, Inc. All rights reserved. + * Use is subject to license terms. + */ + +#include "xenstat_priv.h" + +/* Collect information about networks */ +int xenstat_collect_networks(xenstat_node * node) +{ + + return 1; +} + +/* Free network information in handle */ +void xenstat_uninit_networks(xenstat_handle * handle) +{ +} + +/* Collect information about VBDs */ +int xenstat_collect_vbds(xenstat_node * node) +{ + + return 1; +} + +/* Free VBD information in handle */ +void xenstat_uninit_vbds(xenstat_handle * handle) +{ +} diff --git a/tools/libs/stat/xenstat_linux.c b/tools/libs/stat/xenstat_linux.c new file mode 100644 index 0000000000..793263f2b6 --- /dev/null +++ b/tools/libs/stat/xenstat_linux.c @@ -0,0 +1,496 @@ +/* libxenstat: statistics-collection library for Xen + * Copyright (C) International Business Machines Corp., 2005 + * Authors: Josh Triplett <josh@xxxxxxxxxx> + * Judy Fischbach <jfisch@xxxxxxxxxx> + * David Hendricks <cro_marmot@xxxxxxxxxxx> + * + * This library 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; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library 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. + */ + +/* + * Copyright 2007 Sun Microsystems, Inc. All rights reserved. + * Use is subject to license terms. + */ + +#include <fcntl.h> +#include <dirent.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#include <regex.h> + +#include "xenstat_priv.h" + +#define SYSFS_VBD_PATH "/sys/bus/xen-backend/devices" + +struct priv_data { + FILE *procnetdev; + DIR *sysfsvbd; +}; + +static struct priv_data * +get_priv_data(xenstat_handle *handle) +{ + if (handle->priv != NULL) + return handle->priv; + + handle->priv = malloc(sizeof(struct priv_data)); + if (handle->priv == NULL) + return (NULL); + + ((struct priv_data *)handle->priv)->procnetdev = NULL; + ((struct priv_data *)handle->priv)->sysfsvbd = NULL; + + return handle->priv; +} + +/* Expected format of /proc/net/dev */ +static const char PROCNETDEV_HEADER[] = + "Inter-| Receive |" + " Transmit\n" + " face |bytes packets errs drop fifo frame compressed multicast|" + "bytes packets errs drop fifo colls carrier compressed\n"; + +/* We need to get the name of the bridge interface for use with bonding interfaces */ +/* Use excludeName parameter to avoid adding bridges we don't care about, eg. virbr0 */ +static void getBridge(char *excludeName, char *result, size_t resultLen) +{ + struct dirent *de; + DIR *d; + + char tmp[512] = { 0 }; + + d = opendir("/sys/class/net"); + while ((de = readdir(d)) != NULL) { + if ((strlen(de->d_name) > 0) && (de->d_name[0] != '.') + && (strstr(de->d_name, excludeName) == NULL)) { + sprintf(tmp, "/sys/class/net/%s/bridge", de->d_name); + + if (access(tmp, F_OK) == 0) { + strncpy(result, de->d_name, resultLen - 1); + result[resultLen - 1] = 0; + } + } + } + + closedir(d); +} + +/* parseNetLine provides regular expression based parsing for lines from /proc/net/dev, all the */ +/* information are parsed but not all are used in our case, ie. for xenstat */ +static int parseNetDevLine(char *line, char *iface, unsigned long long *rxBytes, unsigned long long *rxPackets, + unsigned long long *rxErrs, unsigned long long *rxDrops, unsigned long long *rxFifo, + unsigned long long *rxFrames, unsigned long long *rxComp, unsigned long long *rxMcast, + unsigned long long *txBytes, unsigned long long *txPackets, unsigned long long *txErrs, + unsigned long long *txDrops, unsigned long long *txFifo, unsigned long long *txColls, + unsigned long long *txCarrier, unsigned long long *txComp) +{ + /* Temporary/helper variables */ + int ret; + char *tmp; + int i = 0, x = 0, col = 0; + regex_t r; + regmatch_t matches[19]; + int num = 19; + + /* Regular exception to parse all the information from /proc/net/dev line */ + char *regex = "([^:]*):([^ ]*)[ ]*([^ ]*)[ ]*([^ ]*)[ ]*([^ ]*)[ ]*([^ ]*)[ ]*([^ ]*)" + "[ ]*([^ ]*)[ ]*([^ ]*)[ ]*([^ ]*)[ ]*([^ ]*)[ ]*([^ ]*)[ ]*([^ ]*)[ ]*" + "([^ ]*)[ ]*([^ ]*)[ ]*([^ ]*)[ ]*([^ ]*)[ ]*([^ ]*)"; + + /* Initialize all variables called has passed as non-NULL to zeros */ + if (iface != NULL) + memset(iface, 0, sizeof(*iface)); + if (rxBytes != NULL) + *rxBytes = 0; + if (rxPackets != NULL) + *rxPackets = 0; + if (rxErrs != NULL) + *rxErrs = 0; + if (rxDrops != NULL) + *rxDrops = 0; + if (rxFifo != NULL) + *rxFifo = 0; + if (rxFrames != NULL) + *rxFrames = 0; + if (rxPackets != NULL) + *rxPackets = 0; + if (rxComp != NULL) + *rxComp = 0; + if (txBytes != NULL) + *txBytes = 0; + if (txPackets != NULL) + *txPackets = 0; + if (txErrs != NULL) + *txErrs = 0; + if (txDrops != NULL) + *txDrops = 0; + if (txFifo != NULL) + *txFifo = 0; + if (txColls != NULL) + *txColls = 0; + if (txCarrier != NULL) + *txCarrier = 0; + if (txComp != NULL) + *txComp = 0; + + if ((ret = regcomp(&r, regex, REG_EXTENDED))) { + regfree(&r); + return ret; + } + + tmp = (char *)malloc( sizeof(char) ); + if (regexec (&r, line, num, matches, REG_EXTENDED) == 0){ + for (i = 1; i < num; i++) { + /* The expression matches are empty sometimes so we need to check it first */ + if (matches[i].rm_eo - matches[i].rm_so > 0) { + /* Col variable contains current id of non-empty match */ + col++; + tmp = (char *)realloc(tmp, (matches[i].rm_eo - + matches[i].rm_so + 1) * sizeof(char)); + for (x = matches[i].rm_so; x < matches[i].rm_eo; x++) + tmp[x - matches[i].rm_so] = line[x]; + + /* We populate all the fields from /proc/net/dev line */ + if (i > 1) { + unsigned long long ullTmp = strtoull(tmp, NULL, 10); + + switch (col) { + case 2: if (rxBytes != NULL) + *rxBytes = ullTmp; + break; + case 3: if (rxPackets != NULL) + *rxPackets = ullTmp; + break; + case 4: if (rxErrs != NULL) + *rxErrs = ullTmp; + break; + case 5: if (rxDrops != NULL) + *rxDrops = ullTmp; + break; + case 6: if (rxFifo != NULL) + *rxFifo = ullTmp; + break; + case 7: if (rxFrames != NULL) + *rxFrames = ullTmp; + break; + case 8: if (rxComp != NULL) + *rxComp = ullTmp; + break; + case 9: if (rxMcast != NULL) + *rxMcast = ullTmp; + break; + case 10: if (txBytes != NULL) + *txBytes = ullTmp; + break; + case 11: if (txPackets != NULL) + *txPackets = ullTmp; + break; + case 12: if (txErrs != NULL) + *txErrs = ullTmp; + break; + case 13: if (txDrops != NULL) + *txDrops = ullTmp; + break; + case 14: if (txFifo != NULL) + *txFifo = ullTmp; + break; + case 15: if (txColls != NULL) + *txColls = ullTmp; + break; + case 16: if (txCarrier != NULL) + *txCarrier = ullTmp; + break; + case 17: if (txComp != NULL) + *txComp = ullTmp; + break; + } + } + else + /* There were errors when parsing this directly in RE. strpbrk() helps */ + if (iface != NULL) { + char *tmp2 = strpbrk(tmp, "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"); + if (tmp2 != NULL) + strcpy(iface, tmp2); + } + + memset(tmp, 0, matches[i].rm_eo - matches[i].rm_so); + } + } + } + + free(tmp); + regfree(&r); + + return 0; +} + +/* Find out the domid and network number given an interface name. + * Return 0 if the iface cannot be recognized as a Xen VIF. */ +static int get_iface_domid_network(const char *iface, unsigned int *domid_p, unsigned int *netid_p) +{ + char nodename_path[48]; + FILE * nodename_file; + int ret; + + snprintf(nodename_path, 48, "/sys/class/net/%s/device/nodename", iface); + nodename_file = fopen(nodename_path, "r"); + if (nodename_file != NULL) { + ret = fscanf(nodename_file, "backend/vif/%u/%u", domid_p, netid_p); + fclose(nodename_file); + if (ret == 2) + return 1; + } + + if (sscanf(iface, "vif%u.%u", domid_p, netid_p) == 2) + return 1; + + return 0; +} + +/* Collect information about networks */ +int xenstat_collect_networks(xenstat_node * node) +{ + /* Helper variables for parseNetDevLine() function defined above */ + int i; + char line[512] = { 0 }, iface[16] = { 0 }, devBridge[16] = { 0 }, devNoBridge[17] = { 0 }; + unsigned long long rxBytes, rxPackets, rxErrs, rxDrops, txBytes, txPackets, txErrs, txDrops; + + struct priv_data *priv = get_priv_data(node->handle); + + if (priv == NULL) { + perror("Allocation error"); + return 0; + } + + /* Open and validate /proc/net/dev if we haven't already */ + if (priv->procnetdev == NULL) { + char header[sizeof(PROCNETDEV_HEADER)]; + priv->procnetdev = fopen("/proc/net/dev", "r"); + if (priv->procnetdev == NULL) { + perror("Error opening /proc/net/dev"); + return 0; + } + + /* Validate the format of /proc/net/dev */ + if (fread(header, sizeof(PROCNETDEV_HEADER) - 1, 1, + priv->procnetdev) != 1) { + perror("Error reading /proc/net/dev header"); + return 0; + } + header[sizeof(PROCNETDEV_HEADER) - 1] = '\0'; + if (strcmp(header, PROCNETDEV_HEADER) != 0) { + fprintf(stderr, + "Unexpected /proc/net/dev format\n"); + return 0; + } + } + + /* Fill in networks */ + /* FIXME: optimize this */ + fseek(priv->procnetdev, sizeof(PROCNETDEV_HEADER) - 1, + SEEK_SET); + + /* We get the bridge devices for use with bonding interface to get bonding interface stats */ + getBridge("vir", devBridge, sizeof(devBridge)); + snprintf(devNoBridge, sizeof(devNoBridge), "p%s", devBridge); + + while (fgets(line, 512, priv->procnetdev)) { + xenstat_domain *domain; + xenstat_network net; + unsigned int domid; + + parseNetDevLine(line, iface, &rxBytes, &rxPackets, &rxErrs, &rxDrops, NULL, NULL, NULL, + NULL, &txBytes, &txPackets, &txErrs, &txDrops, NULL, NULL, NULL, NULL); + + /* If the device parsed is network bridge and both tx & rx packets are zero, we are most */ + /* likely using bonding so we alter the configuration for dom0 to have bridge stats */ + if ((strstr(iface, devBridge) != NULL) && + (strstr(iface, devNoBridge) == NULL) && + ((domain = xenstat_node_domain(node, 0)) != NULL)) { + for (i = 0; i < domain->num_networks; i++) { + if ((domain->networks[i].id != 0) || + (domain->networks[i].tbytes != 0) || + (domain->networks[i].rbytes != 0)) + continue; + domain->networks[i].tbytes = txBytes; + domain->networks[i].tpackets = txPackets; + domain->networks[i].terrs = txErrs; + domain->networks[i].tdrop = txDrops; + domain->networks[i].rbytes = rxBytes; + domain->networks[i].rpackets = rxPackets; + domain->networks[i].rerrs = rxErrs; + domain->networks[i].rdrop = rxDrops; + } + } + else /* Otherwise we need to preserve old behaviour */ + if (get_iface_domid_network(iface, &domid, &net.id)) { + + net.tbytes = txBytes; + net.tpackets = txPackets; + net.terrs = txErrs; + net.tdrop = txDrops; + net.rbytes = rxBytes; + net.rpackets = rxPackets; + net.rerrs = rxErrs; + net.rdrop = rxDrops; + + /* FIXME: this does a search for the domid */ + domain = xenstat_node_domain(node, domid); + if (domain == NULL) { + fprintf(stderr, + "Found interface vif%u.%u but domain %u" + " does not exist.\n", domid, net.id, + domid); + continue; + } + if (domain->networks == NULL) { + domain->num_networks = 1; + domain->networks = malloc(sizeof(xenstat_network)); + } else { + struct xenstat_network *tmp; + domain->num_networks++; + tmp = realloc(domain->networks, + domain->num_networks * + sizeof(xenstat_network)); + if (tmp == NULL) + free(domain->networks); + domain->networks = tmp; + } + if (domain->networks == NULL) + return 0; + domain->networks[domain->num_networks - 1] = net; + } + } + + return 1; +} + +/* Free network information in handle */ +void xenstat_uninit_networks(xenstat_handle * handle) +{ + struct priv_data *priv = get_priv_data(handle); + if (priv != NULL && priv->procnetdev != NULL) + fclose(priv->procnetdev); +} + +static int read_attributes_vbd(const char *vbd_directory, const char *what, char *ret, int cap) +{ + static char file_name[80]; + int fd, num_read; + + snprintf(file_name, sizeof(file_name), "%s/%s/%s", + SYSFS_VBD_PATH, vbd_directory, what); + fd = open(file_name, O_RDONLY, 0); + if (fd==-1) return -1; + num_read = read(fd, ret, cap - 1); + close(fd); + if (num_read<=0) return -1; + ret[num_read] = '\0'; + return num_read; +} + +/* Collect information about VBDs */ +int xenstat_collect_vbds(xenstat_node * node) +{ + struct dirent *dp; + struct priv_data *priv = get_priv_data(node->handle); + + if (priv == NULL) { + perror("Allocation error"); + return 0; + } + + if (priv->sysfsvbd == NULL) { + priv->sysfsvbd = opendir(SYSFS_VBD_PATH); + if (priv->sysfsvbd == NULL) { + perror("Error opening " SYSFS_VBD_PATH); + return 0; + } + } + + /* Get qdisk statistics */ + read_attributes_qdisk(node); + + rewinddir(priv->sysfsvbd); + + for(dp = readdir(priv->sysfsvbd); dp != NULL ; + dp = readdir(priv->sysfsvbd)) { + xenstat_domain *domain; + xenstat_vbd vbd; + unsigned int domid; + int ret; + char buf[256]; + + ret = sscanf(dp->d_name, "%3s-%u-%u", buf, &domid, &vbd.dev); + if (ret != 3) + continue; + if (!(strstr(buf, "vbd")) && !(strstr(buf, "tap"))) + continue; + + if (strcmp(buf,"vbd") == 0) + vbd.back_type = 1; + else if (strcmp(buf,"tap") == 0) + vbd.back_type = 2; + else + vbd.back_type = 0; + + domain = xenstat_node_domain(node, domid); + if (domain == NULL) { + fprintf(stderr, + "Found interface %s-%u-%u but domain %u" + " does not exist.\n", + buf, domid, vbd.dev, domid); + continue; + } + + if (vbd.back_type == 1 || vbd.back_type == 2) + { + + vbd.error = 0; + + if ((read_attributes_vbd(dp->d_name, "statistics/oo_req", buf, 256)<=0) || + ((ret = sscanf(buf, "%llu", &vbd.oo_reqs)) != 1) || + (read_attributes_vbd(dp->d_name, "statistics/rd_req", buf, 256)<=0) || + ((ret = sscanf(buf, "%llu", &vbd.rd_reqs)) != 1) || + (read_attributes_vbd(dp->d_name, "statistics/wr_req", buf, 256)<=0) || + ((ret = sscanf(buf, "%llu", &vbd.wr_reqs)) != 1) || + (read_attributes_vbd(dp->d_name, "statistics/rd_sect", buf, 256)<=0) || + ((ret = sscanf(buf, "%llu", &vbd.wr_sects)) != 1) || + (read_attributes_vbd(dp->d_name, "statistics/wr_sect", buf, 256)<=0) || + ((ret = sscanf(buf, "%llu", &vbd.wr_sects)) != 1)) + { + vbd.error = 1; + } + } + else + { + vbd.error = 1; + } + if ((xenstat_save_vbd(domain, &vbd)) == NULL) { + perror("Allocation error"); + return 0; + } + } + + return 1; +} + +/* Free VBD information in handle */ +void xenstat_uninit_vbds(xenstat_handle * handle) +{ + struct priv_data *priv = get_priv_data(handle); + if (priv != NULL && priv->sysfsvbd != NULL) + closedir(priv->sysfsvbd); +} diff --git a/tools/libs/stat/xenstat_netbsd.c b/tools/libs/stat/xenstat_netbsd.c new file mode 100644 index 0000000000..6e9d6aee10 --- /dev/null +++ b/tools/libs/stat/xenstat_netbsd.c @@ -0,0 +1,97 @@ +/* libxenstat: statistics-collection library for Xen + * Copyright (C) International Business Machines Corp., 2005 + * Authors: Josh Triplett <josht@xxxxxxxxxx> + * Judy Fischbach <jfisch@xxxxxxxxxx> + * David Hendricks <dhendrix@xxxxxxxxxx> + * + * This library 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; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library 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. + */ + +/* + * Copyright 2007 Sun Microsystems, Inc. All rights reserved. + * Use is subject to license terms. + */ + +#include <fcntl.h> +#include <dirent.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + +#include "xenstat_priv.h" + +#define SYSFS_VBD_PATH "/sys/devices/xen-backend/" + +struct priv_data { + FILE *procnetdev; + DIR *sysfsvbd; +}; + +static struct priv_data * +get_priv_data(xenstat_handle *handle) +{ + if (handle->priv != NULL) + return handle->priv; + + handle->priv = malloc(sizeof(struct priv_data)); + if (handle->priv == NULL) + return (NULL); + + ((struct priv_data *)handle->priv)->procnetdev = NULL; + ((struct priv_data *)handle->priv)->sysfsvbd = NULL; + + return handle->priv; +} + +/* Expected format of /proc/net/dev */ +static const char PROCNETDEV_HEADER[] = + "Inter-| Receive |" + " Transmit\n" + " face |bytes packets errs drop fifo frame compressed multicast|" + "bytes packets errs drop fifo colls carrier compressed\n"; + +/* Collect information about networks */ +int xenstat_collect_networks(xenstat_node * node) +{ + /* XXX fixme: implement code to get stats from libkvm ! */ + return 1; +} + +/* Free network information in handle */ +void xenstat_uninit_networks(xenstat_handle * handle) +{ + struct priv_data *priv = get_priv_data(handle); + if (priv != NULL && priv->procnetdev != NULL) + fclose(priv->procnetdev); +} + +static int read_attributes_vbd(const char *vbd_directory, const char *what, char *ret, int cap) +{ + /* XXX implement */ + return 0; +} + +/* Collect information about VBDs */ +int xenstat_collect_vbds(xenstat_node * node) +{ + return 1; +} + +/* Free VBD information in handle */ +void xenstat_uninit_vbds(xenstat_handle * handle) +{ + struct priv_data *priv = get_priv_data(handle); + if (priv != NULL && priv->sysfsvbd != NULL) + closedir(priv->sysfsvbd); +} diff --git a/tools/libs/stat/xenstat_priv.h b/tools/libs/stat/xenstat_priv.h new file mode 100644 index 0000000000..4eb44a8ebb --- /dev/null +++ b/tools/libs/stat/xenstat_priv.h @@ -0,0 +1,108 @@ +/* libxenstat: statistics-collection library for Xen + * Copyright (C) International Business Machines Corp., 2005 + * Authors: Josh Triplett <josh@xxxxxxxxxx> + * Judy Fischbach <jfisch@xxxxxxxxxx> + * David Hendricks <cro_marmot@xxxxxxxxxxx> + * + * This library 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; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library 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. + */ + +/* + * Copyright 2007 Sun Microsystems, Inc. All rights reserved. + * Use is subject to license terms. + */ + +#ifndef XENSTAT_PRIV_H +#define XENSTAT_PRIV_H + +#include <sys/types.h> +#include <xenstore.h> +#include "xenstat.h" + +#include "xenctrl.h" + +#define SHORT_ASC_LEN 5 /* length of 65535 */ +#define VERSION_SIZE (2 * SHORT_ASC_LEN + 1 + sizeof(xen_extraversion_t) + 1) + +struct xenstat_handle { + xc_interface *xc_handle; + struct xs_handle *xshandle; /* xenstore handle */ + int page_size; + void *priv; + char xen_version[VERSION_SIZE]; /* xen version running on this node */ +}; + +struct xenstat_node { + xenstat_handle *handle; + unsigned int flags; + unsigned long long cpu_hz; + unsigned int num_cpus; + unsigned long long tot_mem; + unsigned long long free_mem; + unsigned int num_domains; + xenstat_domain *domains; /* Array of length num_domains */ + long freeable_mb; +}; + +struct xenstat_domain { + unsigned int id; + char *name; + unsigned int state; + unsigned long long cpu_ns; + unsigned int num_vcpus; /* No. vcpus configured for domain */ + xenstat_vcpu *vcpus; /* Array of length num_vcpus */ + unsigned long long cur_mem; /* Current memory reservation */ + unsigned long long max_mem; /* Total memory allowed */ + unsigned int ssid; + unsigned int num_networks; + xenstat_network *networks; /* Array of length num_networks */ + unsigned int num_vbds; + xenstat_vbd *vbds; +}; + +struct xenstat_vcpu { + unsigned int online; + unsigned long long ns; +}; + +struct xenstat_network { + unsigned int id; + /* Received */ + unsigned long long rbytes; + unsigned long long rpackets; + unsigned long long rerrs; + unsigned long long rdrop; + /* Transmitted */ + unsigned long long tbytes; + unsigned long long tpackets; + unsigned long long terrs; + unsigned long long tdrop; +}; + +struct xenstat_vbd { + unsigned int back_type; + unsigned int dev; + unsigned int error; + unsigned long long oo_reqs; + unsigned long long rd_reqs; + unsigned long long wr_reqs; + unsigned long long rd_sects; + unsigned long long wr_sects; +}; + +extern int xenstat_collect_networks(xenstat_node * node); +extern void xenstat_uninit_networks(xenstat_handle * handle); +extern int xenstat_collect_vbds(xenstat_node * node); +extern void xenstat_uninit_vbds(xenstat_handle * handle); +extern void read_attributes_qdisk(xenstat_node * node); +extern xenstat_vbd *xenstat_save_vbd(xenstat_domain * domain, xenstat_vbd * vbd); + +#endif /* XENSTAT_PRIV_H */ diff --git a/tools/libs/stat/xenstat_qmp.c b/tools/libs/stat/xenstat_qmp.c new file mode 100644 index 0000000000..19b236e7b6 --- /dev/null +++ b/tools/libs/stat/xenstat_qmp.c @@ -0,0 +1,446 @@ +/* libxenstat: statistics-collection library for Xen + * + * This library 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; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library 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 <fcntl.h> +#include <sys/types.h> +#include <sys/socket.h> +#include <poll.h> +#include <sys/un.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + +#include <xenctrl.h> + +#include "xenstat_priv.h" +#include "_paths.h" + +#ifdef HAVE_YAJL_YAJL_VERSION_H +# include <yajl/yajl_version.h> +#endif + +/* YAJL version check */ +#if defined(YAJL_MAJOR) && (YAJL_MAJOR > 1) +# define HAVE_YAJL_V2 1 +#endif + +#ifdef HAVE_YAJL_V2 + +#include <yajl/yajl_tree.h> + +static unsigned char *qmp_query(int, char *); + +enum query_blockstats { + QMP_STATS_RETURN = 0, + QMP_STATS_DEVICE = 1, + QMP_STATS = 2, + QMP_RD_BYTES = 3, + QMP_WR_BYTES = 4, + QMP_RD_OPERATIONS = 5, + QMP_WR_OPERATIONS = 6, +}; + +enum query_block { + QMP_BLOCK_RETURN = 0, + QMP_BLOCK_DEVICE = 1, + QMP_INSERTED = 2, + QMP_FILE = 3, +}; + + +/* Given the qmp device name, get the image filename associated with it + QMP Syntax for querying block information: + In: { "execute": "query-block" } + Out: {"return": [{ + "device": 'str, "locked": 'bool', "removable": bool, + "inserted": { + "iops_rd": 'int', + "image": { + "virtual-size": 'int', "filename": 'str', "cluster-size": 'int', + "format": 'str', "actual-size": 'int', "dirty-flag": 'bool' + }, + "iops_wr": 'int', "ro": 'bool', "backing_file_depth": 'int', + "drv": 'str', "iops": 'int', "bps_wr": 'int', "encrypted": 'bool', + "bps": 'int', "bps_rd": 'int', + "file": 'str', "encryption_key_missing": 'bool' + }, + "type": 'str' + }]} +*/ +static char *qmp_get_block_image(xenstat_node *node, char *qmp_devname, int qfd) +{ + char *tmp, *file = NULL; + char *query_block_cmd = "{ \"execute\": \"query-block\" }"; + static const char *const qblock[] = { + [ QMP_BLOCK_RETURN ] = "return", + [ QMP_BLOCK_DEVICE ] = "device", + [ QMP_INSERTED ] = "inserted", + [ QMP_FILE ] = "file", + }; + const char *ptr[] = {0, 0}; + unsigned char *qmp_stats; + yajl_val info, ret_obj, dev_obj, n; + int i; + + if ((qmp_stats = qmp_query(qfd, query_block_cmd)) == NULL) + return NULL; + + /* Use libyajl version 2.0.3 or newer for the tree parser feature with bug fixes */ + info = yajl_tree_parse((char *)qmp_stats, NULL, 0); + free(qmp_stats); + if (info == NULL) + return NULL; + + ptr[0] = qblock[QMP_BLOCK_RETURN]; /* "return" */ + if ((ret_obj = yajl_tree_get(info, ptr, yajl_t_array)) == NULL) + goto done; + + for (i=0; i<YAJL_GET_ARRAY(ret_obj)->len; i++) { + n = YAJL_GET_ARRAY(ret_obj)->values[i]; + + ptr[0] = qblock[QMP_BLOCK_DEVICE]; /* "device" */ + if ((dev_obj = yajl_tree_get(n, ptr, yajl_t_any)) != NULL) { + tmp = YAJL_GET_STRING(dev_obj); + if (!tmp || strcmp(qmp_devname, tmp)) + continue; + } + else + continue; + + ptr[0] = qblock[QMP_INSERTED]; /* "inserted" */ + n = yajl_tree_get(n, ptr, yajl_t_any); + if (n) { + ptr[0] = qblock[QMP_FILE]; /* "file" */ + n = yajl_tree_get(n, ptr, yajl_t_any); + if (n && YAJL_IS_STRING(n)) { + tmp = YAJL_GET_STRING(n); + file = malloc(strlen(tmp)+1); + if (file != NULL) + strcpy(file, tmp); + goto done; + } + } + } +done: + yajl_tree_free(info); + return file; +} + + +/* Given a QMP device name, lookup the associated xenstore qdisk device id */ +static void lookup_xenstore_devid(xenstat_node * node, unsigned int domid, char *qmp_devname, + int qfd, unsigned int *dev, unsigned int *sector_size) +{ + char **dev_ids, *tmp, *ptr, *image, path[80]; + unsigned int num_dev_ids; + int i, devid; + + /* Get all the qdisk dev IDs associated with the this VM */ + snprintf(path, sizeof(path),"/local/domain/0/backend/qdisk/%i", domid); + dev_ids = xs_directory(node->handle->xshandle, XBT_NULL, path, &num_dev_ids); + if (dev_ids == NULL) { + return; + } + + /* Get the filename of the image associated with this QMP device */ + image = qmp_get_block_image(node, qmp_devname, qfd); + if (image == NULL) { + free(dev_ids); + return; + } + + /* Look for a matching image in xenstore */ + for (i=0; i<num_dev_ids; i++) { + devid = atoi(dev_ids[i]); + /* Get the xenstore name of the image */ + snprintf(path, sizeof(path),"/local/domain/0/backend/qdisk/%i/%i/params", domid, devid); + if ((ptr = xs_read(node->handle->xshandle, XBT_NULL, path, NULL)) == NULL) + continue; + + /* Get to actual path in string */ + if ((tmp = strchr(ptr, '/')) == NULL) + tmp = ptr; + if (!strcmp(tmp,image)) { + *dev = devid; + free(ptr); + + /* Get the xenstore sector size of the image while we're here */ + snprintf(path, sizeof(path),"/local/domain/0/backend/qdisk/%i/%i/sector-size", domid, devid); + if ((ptr = xs_read(node->handle->xshandle, XBT_NULL, path, NULL)) != NULL) { + *sector_size = atoi((char *)ptr); + free(ptr); + } + break; + } + free(ptr); + } + + free(image); + free(dev_ids); +} + +/* Parse the stats buffer which contains I/O data for all the disks belonging to domid */ +static void qmp_parse_stats(xenstat_node *node, unsigned int domid, unsigned char *stats_buf, int qfd) +{ + char *qmp_devname; + static const char *const qstats[] = { + [ QMP_STATS_RETURN ] = "return", + [ QMP_STATS_DEVICE ] = "device", + [ QMP_STATS ] = "stats", + [ QMP_RD_BYTES ] = "rd_bytes", + [ QMP_WR_BYTES ] = "wr_bytes", + [ QMP_RD_OPERATIONS ] = "rd_operations", + [ QMP_WR_OPERATIONS ] = "wr_operations", + }; + const char *ptr[] = {0, 0}; + yajl_val info, ret_obj, stats_obj, n; + xenstat_vbd vbd; + xenstat_domain *domain; + unsigned int sector_size = 512; + int i, j; + + /* Use libyajl version 2.0.3 or newer for the tree parser feature */ + if ((info = yajl_tree_parse((char *)stats_buf, NULL, 0)) == NULL) + return; + + ptr[0] = qstats[QMP_STATS_RETURN]; /* "return" */ + if ((ret_obj = yajl_tree_get(info, ptr, yajl_t_array)) == NULL) + goto done; + + /* Array of devices */ + for (i=0; i<YAJL_GET_ARRAY(ret_obj)->len; i++) { + memset(&vbd, 0, sizeof(xenstat_vbd)); + qmp_devname = NULL; + stats_obj = YAJL_GET_ARRAY(ret_obj)->values[i]; + + ptr[0] = qstats[QMP_STATS_DEVICE]; /* "device" */ + if ((n = yajl_tree_get(stats_obj, ptr, yajl_t_any)) != NULL) + qmp_devname = YAJL_GET_STRING(n); + + ptr[0] = qstats[QMP_STATS]; /* "stats" */ + stats_obj = yajl_tree_get(stats_obj, ptr, yajl_t_object); + if (stats_obj && YAJL_IS_OBJECT(stats_obj)) { + for (j=3; j<7; j++) { + ptr[0] = qstats[j]; + n = yajl_tree_get(stats_obj, ptr, yajl_t_number); + if (n && YAJL_IS_NUMBER(n)) { + switch(j) { + case QMP_RD_BYTES: /* "rd_bytes" */ + vbd.rd_sects = YAJL_GET_INTEGER(n) / sector_size; + break; + case QMP_WR_BYTES: /* "wr_bytes" */ + vbd.wr_sects = YAJL_GET_INTEGER(n) / sector_size; + break; + case QMP_RD_OPERATIONS: /* "rd_operations" */ + vbd.rd_reqs = YAJL_GET_INTEGER(n); + break; + case QMP_WR_OPERATIONS: /* "wr_operations" */ + vbd.wr_reqs = YAJL_GET_INTEGER(n); + break; + } + } + } + /* With the QMP device name, lookup the xenstore qdisk device ID and set vdb.dev */ + if (qmp_devname) + lookup_xenstore_devid(node, domid, qmp_devname, qfd, &vbd.dev, &sector_size); + if ((domain = xenstat_node_domain(node, domid)) == NULL) + continue; + if ((xenstat_save_vbd(domain, &vbd)) == NULL) + goto done; + } + } +done: + yajl_tree_free(info); +} + +/* Write a command via the QMP. Returns number of bytes written */ +static size_t qmp_write(int qfd, char *cmd, size_t cmd_len) +{ + size_t pos = 0; + ssize_t res; + + while (cmd_len > pos) { + res = write(qfd, cmd + pos, cmd_len - pos); + switch (res) { + case -1: + if (errno == EINTR || errno == EAGAIN) + continue; + return 0; + case 0: + errno = EPIPE; + return pos; + default: + pos += (size_t)res; + } + } + return pos; +} + +/* Read the data sent in response to a QMP execute query. Returns 1 for success */ +static int qmp_read(int qfd, unsigned char **qstats) +{ + unsigned char buf[1024], *ptr; + struct pollfd pfd[1]; + int n, qsize = 0; + + *qstats = NULL; + pfd[0].fd = qfd; + pfd[0].events = POLLIN; + while ((n = poll(pfd, 1, 10)) > 0) { + if (pfd[0].revents & POLLIN) { + if ((n = read(qfd, buf, sizeof(buf))) < 0) { + free(*qstats); + return 0; + } + ptr = realloc(*qstats, qsize+n+1); + if (ptr == NULL) { + free(*qstats); + return 0; + } + memcpy(&ptr[qsize], buf, n); + qsize += n; + ptr[qsize] = 0; + *qstats = ptr; + } + } + return 1; +} + +/* With the given cmd, query QMP for requested data. Returns allocated buffer containing data or NULL */ +static unsigned char *qmp_query(int qfd, char *cmd) +{ + unsigned char *qstats = NULL; + int n; + + n = strlen(cmd); + if (qmp_write(qfd, cmd, n) != n) + return NULL; + if (!qmp_read(qfd, &qstats)) + return NULL; + return qstats; +} + +/* Returns a socket connected to the QMP socket. Returns -1 on failure. */ +static int qmp_connect(char *path) +{ + struct sockaddr_un sun; + int s; + + if ((s = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) + return -1; + (void)fcntl(s, F_SETFD, 1); + + memset(&sun, 0, sizeof(struct sockaddr_un)); + sun.sun_family = AF_UNIX; + + if (strlen(path) >= sizeof(sun.sun_path)) { + close(s); + return -1; + } + + strcpy(sun.sun_path, path); + if (connect(s, (struct sockaddr *)&sun, SUN_LEN(&sun)) < 0) { + close(s); + return -1; + } + + return s; +} + +/* Gather the qdisk statistics by querying QMP + Resources: http://wiki.qemu.org/QMP and qmp-commands.hx from the qemu code + QMP Syntax for entering command mode. This command must be issued before + issuing any other command: + In: {"execute": "qmp_capabilities"} + Out: {"return": {}} + QMP Syntax for querying block statistics: + In: { "execute": "query-blockstats" } + Out: {"return": [{ + "device": 'str', + "parent": { + "stats": { + "flush_total_time_ns": 'int', "wr_highest_offset": 'int', + "wr_total_time_ns": 'int', "wr_bytes": 'int', + "rd_total_time_ns": 'int', "flush_operations": 'int', + "wr_operations": 'int', "rd_bytes": 'int', "rd_operations": 'int' + } + }, + "stats": { + "flush_total_time_ns": 'int', "wr_highest_offset": 'int', + "wr_total_time_ns": 'int', "wr_bytes": 'int', + "rd_total_time_ns": 'int', "flush_operations": 'int', + "wr_operations": 'int', "rd_bytes": 'int', "rd_operations": 'int' + } + }]} +*/ +static void read_attributes_qdisk_dom(xenstat_node *node, domid_t domain) +{ + char *cmd_mode = "{ \"execute\": \"qmp_capabilities\" }"; + char *query_blockstats_cmd = "{ \"execute\": \"query-blockstats\" }"; + unsigned char *qmp_stats, *val; + char path[80]; + int qfd; + + /* Verify that qdisk disks are used with this VM */ + snprintf(path, sizeof(path),"/local/domain/0/backend/qdisk/%i", domain); + val = xs_read(node->handle->xshandle, XBT_NULL, path, NULL); + if (val == NULL) + return; + free(val); + + /* Connect to this VMs QMP socket */ + snprintf(path, sizeof(path), XEN_RUN_DIR "/qmp-libxenstat-%i", domain); + if ((qfd = qmp_connect(path)) < 0) + return; + + /* First enable QMP capabilities so that we can query for data */ + if ((qmp_stats = qmp_query(qfd, cmd_mode)) != NULL) { + free(qmp_stats); + /* Query QMP for this VMs blockstats */ + qmp_stats = qmp_query(qfd, query_blockstats_cmd); + if (qmp_stats != NULL) { + qmp_parse_stats(node, domain, qmp_stats, qfd); + free(qmp_stats); + } + } + close(qfd); +} + +void read_attributes_qdisk(xenstat_node * node) +{ + xc_domaininfo_t dominfo[1024]; + int i, num_doms; + domid_t next_domid = 0; + + for (;;) { + num_doms = xc_domain_getinfolist(node->handle->xc_handle, + next_domid, 1024, dominfo); + if (num_doms <= 0) + return; + + for (i = 0; i < num_doms; i++) + if (dominfo[i].domain > 0) + read_attributes_qdisk_dom(node, dominfo[i].domain); + + next_domid = dominfo[num_doms - 1].domain + 1; + } +} + +#else /* !HAVE_YAJL_V2 */ + +/* Statistics gathering for qdisks requires at least yajl v2 */ +void read_attributes_qdisk(xenstat_node * node) +{ +} + +#endif /* !HAVE_YAJL_V2 */

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