From 1da3983b7db55f506d0764888aabf8001736f98f Mon Sep 17 00:00:00 2001 From: Andres Lagar-Cavilla Date: Fri, 27 Jan 2012 18:23:42 +0000 Subject: tools: memshrtool: tool to test and exercise the sharing subsystem This is demo code meant to showcase how to perform sharing operations. It is useful for testing. [ Added appropriate lines to .hgignore and .gitignore -iwj ] Signed-off-by: Adin Scannell Signed-off-by: Andres Lagar-Cavilla Signed-off-by: Ian Jackson Committed-by: Ian Jackson --- .gitignore | 1 + .hgignore | 1 + tools/tests/mem-sharing/Makefile | 26 ++++++ tools/tests/mem-sharing/memshrtool.c | 165 +++++++++++++++++++++++++++++++++++ 4 files changed, 193 insertions(+) create mode 100644 tools/tests/mem-sharing/Makefile create mode 100644 tools/tests/mem-sharing/memshrtool.c diff --git a/.gitignore b/.gitignore index 18f4ce5065..13d3e94b31 100644 --- a/.gitignore +++ b/.gitignore @@ -210,6 +210,7 @@ tools/tests/x86_emulate tools/tests/regression/installed/* tools/tests/regression/build/* tools/tests/regression/downloads/* +tools/tests/mem-sharing/memshrtool tools/vnet/Make.local tools/vnet/build/* tools/vnet/gc diff --git a/.hgignore b/.hgignore index 9d9264ad09..fd6cfaade0 100644 --- a/.hgignore +++ b/.hgignore @@ -221,6 +221,7 @@ ^tools/tests/regression/build/.*$ ^tools/tests/regression/downloads/.*$ ^tools/tests/xen-access/xen-access$ +^tools/tests/mem-sharing/memshrtool$ ^tools/vnet/Make.local$ ^tools/vnet/build/.*$ ^tools/vnet/gc$ diff --git a/tools/tests/mem-sharing/Makefile b/tools/tests/mem-sharing/Makefile new file mode 100644 index 0000000000..135450291f --- /dev/null +++ b/tools/tests/mem-sharing/Makefile @@ -0,0 +1,26 @@ +XEN_ROOT=$(CURDIR)/../../.. +include $(XEN_ROOT)/tools/Rules.mk + +CFLAGS += -Werror + +CFLAGS += $(CFLAGS_libxenctrl) +CFLAGS += $(CFLAGS_xeninclude) + +TARGETS-y := +TARGETS-$(CONFIG_X86) += memshrtool +TARGETS := $(TARGETS-y) + +.PHONY: all +all: build + +.PHONY: build +build: $(TARGETS) + +.PHONY: clean +clean: + $(RM) *.o $(TARGETS) *~ $(DEPS) + +memshrtool: memshrtool.o + $(CC) -o $@ $< $(LDFLAGS) $(LDLIBS_libxenctrl) + +-include $(DEPS) diff --git a/tools/tests/mem-sharing/memshrtool.c b/tools/tests/mem-sharing/memshrtool.c new file mode 100644 index 0000000000..b876619ac9 --- /dev/null +++ b/tools/tests/mem-sharing/memshrtool.c @@ -0,0 +1,165 @@ +/* + * memshrtool.c + * + * Copyright 2011 GridCentric Inc. (Adin Scannell, Andres Lagar-Cavilla) + */ + +#include +#include +#include +#include +#include +#include + +#include "xenctrl.h" + +static int usage(const char* prog) +{ + printf("usage: %s [args...]\n", prog); + printf("where may be:\n"); + printf(" info - Display total sharing info.\n"); + printf(" enable - Enable sharing on a domain.\n"); + printf(" disable - Disable sharing on a domain.\n"); + printf(" nominate - Nominate a page for sharing.\n"); + printf(" share \n"); + printf(" - Share two pages.\n"); + printf(" unshare - Unshare a page by grabbing a writable map.\n"); + printf(" add-to-physmap \n"); + printf(" - Populate a page in a domain with a shared page.\n"); + printf(" debug-gfn - Debug a particular domain and gfn.\n"); + return 1; +} + +#define R(f) do { \ + int rc = f; \ + if ( rc < 0 ) { \ + printf("error executing %s: %s\n", #f, \ + ((errno * -1) == XEN_DOMCTL_MEM_SHARING_C_HANDLE_INVALID) ? \ + "problem with client handle" :\ + ((errno * -1) == XEN_DOMCTL_MEM_SHARING_S_HANDLE_INVALID) ? \ + "problem with source handle" : strerror(errno)); \ + return rc; \ + } \ +} while(0) + +int main(int argc, const char** argv) +{ + const char* cmd = NULL; + xc_interface *xch = xc_interface_open(0, 0, 0); + + if( argc < 2 ) + return usage(argv[0]); + + cmd = argv[1]; + + if( !strcasecmp(cmd, "info") ) + { + if( argc != 2 ) + return usage(argv[0]); + + printf("used = %ld\n", xc_sharing_used_frames(xch)); + printf("freed = %ld\n", xc_sharing_freed_pages(xch)); + } + else if( !strcasecmp(cmd, "enable") ) + { + domid_t domid; + + if( argc != 3 ) + return usage(argv[0]); + + domid = strtol(argv[2], NULL, 0); + R(xc_memshr_control(xch, domid, 1)); + } + else if( !strcasecmp(cmd, "disable") ) + { + domid_t domid; + + if( argc != 3 ) + return usage(argv[0]); + + domid = strtol(argv[2], NULL, 0); + R(xc_memshr_control(xch, domid, 0)); + } + else if( !strcasecmp(cmd, "nominate") ) + { + domid_t domid; + unsigned long gfn; + uint64_t handle; + + if( argc != 4 ) + return usage(argv[0]); + + domid = strtol(argv[2], NULL, 0); + gfn = strtol(argv[3], NULL, 0); + R(xc_memshr_nominate_gfn(xch, domid, gfn, &handle)); + printf("handle = 0x%08llx\n", (unsigned long long) handle); + } + else if( !strcasecmp(cmd, "share") ) + { + domid_t domid; + unsigned long gfn; + uint64_t handle; + domid_t source_domid; + unsigned long source_gfn; + uint64_t source_handle; + + if( argc != 8 ) + return usage(argv[0]); + + domid = strtol(argv[2], NULL, 0); + gfn = strtol(argv[3], NULL, 0); + handle = strtol(argv[4], NULL, 0); + source_domid = strtol(argv[5], NULL, 0); + source_gfn = strtol(argv[6], NULL, 0); + source_handle = strtol(argv[7], NULL, 0); + R(xc_memshr_share_gfns(xch, source_domid, source_gfn, source_handle, domid, gfn, handle)); + } + else if( !strcasecmp(cmd, "unshare") ) + { + domid_t domid; + unsigned long gfn; + void *map; + + if( argc != 4 ) + return usage(argv[0]); + + domid = strtol(argv[2], NULL, 0); + gfn = strtol(argv[3], NULL, 0); + map = xc_map_foreign_range(xch, domid, 4096, PROT_WRITE, gfn); + if( map ) + munmap(map, 4096); + R((int)!map); + } + else if( !strcasecmp(cmd, "add-to-physmap") ) + { + domid_t domid; + unsigned long gfn; + domid_t source_domid; + unsigned long source_gfn; + uint64_t source_handle; + + if( argc != 7 ) + return usage(argv[0]); + + domid = strtol(argv[2], NULL, 0); + gfn = strtol(argv[3], NULL, 0); + source_domid = strtol(argv[4], NULL, 0); + source_gfn = strtol(argv[5], NULL, 0); + source_handle = strtol(argv[6], NULL, 0); + R(xc_memshr_add_to_physmap(xch, source_domid, source_gfn, source_handle, domid, gfn)); + } + else if( !strcasecmp(cmd, "debug-gfn") ) + { + domid_t domid; + unsigned long gfn; + + if( argc != 4 ) + return usage(argv[0]); + + domid = strtol(argv[2], NULL, 0); + gfn = strtol(argv[3], NULL, 0); + R(xc_memshr_debug_gfn(xch, domid, gfn)); + } + + return 0; +} -- cgit v1.2.3