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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [RFC XEN PATCH v3 12/39] tools/xen-ndctl: add NVDIMM management util 'xen-ndctl'
The kernel NVDIMM driver and the traditional NVDIMM management
utilities in Dom0 does not work now. 'xen-ndctl' is added as an
alternatively, which manages NVDIMM via Xen hypercalls.
Signed-off-by: Haozhong Zhang <haozhong.zhang@xxxxxxxxx>
---
Cc: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
Cc: Wei Liu <wei.liu2@xxxxxxxxxx>
---
.gitignore | 1 +
tools/misc/Makefile | 4 ++
tools/misc/xen-ndctl.c | 172 +++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 177 insertions(+)
create mode 100644 tools/misc/xen-ndctl.c
diff --git a/.gitignore b/.gitignore
index ecb198f914..30655673f7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -216,6 +216,7 @@ tools/misc/xen-hvmctx
tools/misc/xenlockprof
tools/misc/lowmemd
tools/misc/xencov
+tools/misc/xen-ndctl
tools/pkg-config/*
tools/qemu-xen-build
tools/xentrace/xenalyze
diff --git a/tools/misc/Makefile b/tools/misc/Makefile
index eaa28793ef..124775b7f4 100644
--- a/tools/misc/Makefile
+++ b/tools/misc/Makefile
@@ -32,6 +32,7 @@ INSTALL_SBIN += xenpm
INSTALL_SBIN += xenwatchdogd
INSTALL_SBIN += xen-livepatch
INSTALL_SBIN += xen-diag
+INSTALL_SBIN += xen-ndctl
INSTALL_SBIN += $(INSTALL_SBIN-y)
# Everything to be installed in a private bin/
@@ -118,4 +119,7 @@ xen-lowmemd: xen-lowmemd.o
xencov: xencov.o
$(CC) $(LDFLAGS) -o $@ $< $(LDLIBS_libxenctrl) $(APPEND_LDFLAGS)
+xen-ndctl: xen-ndctl.o
+ $(CC) $(LDFLAGS) -o $@ $< $(LDLIBS_libxenctrl) $(APPEND_LDFLAGS)
+
-include $(DEPS_INCLUDE)
diff --git a/tools/misc/xen-ndctl.c b/tools/misc/xen-ndctl.c
new file mode 100644
index 0000000000..de40e29ff6
--- /dev/null
+++ b/tools/misc/xen-ndctl.c
@@ -0,0 +1,172 @@
+/*
+ * xen-ndctl.c
+ *
+ * Xen NVDIMM management tool
+ *
+ * Copyright (C) 2017, Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <errno.h>
+#include <stdio.h>
+#include <string.h>
+#include <xenctrl.h>
+
+static xc_interface *xch;
+
+static int handle_help(int argc, char *argv[]);
+static int handle_list_cmds(int argc, char *argv[]);
+
+static const struct xen_ndctl_cmd
+{
+ const char *name;
+ const char *syntax;
+ const char *help;
+ int (*handler)(int argc, char **argv);
+ bool need_xc;
+} cmds[] =
+{
+ {
+ .name = "help",
+ .syntax = "[command]",
+ .help = "Show this message or the help message of 'command'.\n"
+ "Use command 'list-cmds' to list all supported commands.\n",
+ .handler = handle_help,
+ },
+
+ {
+ .name = "list-cmds",
+ .syntax = "",
+ .help = "List all supported commands.\n",
+ .handler = handle_list_cmds,
+ },
+};
+
+static const unsigned int nr_cmds = sizeof(cmds) / sizeof(cmds[0]);
+
+static void show_help(const char *cmd)
+{
+ unsigned int i;
+
+ if ( !cmd )
+ {
+ fprintf(stderr,
+ "Usage: xen-ndctl <command> [args]\n\n"
+ "List all supported commands by 'xen-ndctl list-cmds'.\n"
+ "Get help of a command by 'xen-ndctl help <command>'.\n");
+ return;
+ }
+
+ for ( i = 0; i < nr_cmds; i++ )
+ if ( !strcmp(cmd, cmds[i].name) )
+ {
+ fprintf(stderr, "Usage: xen-ndctl %s %s\n\n%s",
+ cmds[i].name, cmds[i].syntax, cmds[i].help);
+ break;
+ }
+
+ if ( i == nr_cmds )
+ fprintf(stderr, "Unsupported command '%s'.\n"
+ "List all supported commands by 'xen-ndctl list-cmds'.\n",
+ cmd);
+}
+
+static int handle_unrecognized_argument(const char *cmd, const char *argv)
+{
+ fprintf(stderr, "Unrecognized argument: %s.\n\n", argv);
+ show_help(cmd);
+
+ return -EINVAL;
+}
+
+static int handle_help(int argc, char *argv[])
+{
+ if ( argc == 1 )
+ show_help(NULL);
+ else if ( argc == 2 )
+ show_help(argv[1]);
+ else
+ return handle_unrecognized_argument(argv[0], argv[2]);
+
+ return 0;
+}
+
+static int handle_list_cmds(int argc, char *argv[])
+{
+ unsigned int i;
+
+ if ( argc > 1 )
+ return handle_unrecognized_argument(argv[0], argv[1]);
+
+ for ( i = 0; i < nr_cmds; i++ )
+ fprintf(stderr, "%s\n", cmds[i].name);
+
+ return 0;
+}
+
+int main(int argc, char *argv[])
+{
+ unsigned int i;
+ int rc = 0;
+ const char *cmd;
+
+ if ( argc <= 1 )
+ {
+ show_help(NULL);
+ return 0;
+ }
+
+ cmd = argv[1];
+
+ for ( i = 0; i < nr_cmds; i++ )
+ if ( !strcmp(cmd, cmds[i].name) )
+ {
+ if ( cmds[i].need_xc )
+ {
+ xch = xc_interface_open(0, 0, 0);
+ if ( !xch )
+ {
+ rc = -errno;
+ fprintf(stderr, "Cannot get xc handler: %s\n",
+ strerror(errno));
+ break;
+ }
+ }
+ rc = cmds[i].handler(argc - 1, &argv[1]);
+ if ( rc )
+ fprintf(stderr, "\n'%s' failed: %s\n",
+ cmds[i].name, strerror(-rc));
+ break;
+ }
+
+ if ( i == nr_cmds )
+ {
+ fprintf(stderr, "Unsupported command '%s'. "
+ "List all supported commands by 'xen-ndctl list-cmds'.\n",
+ cmd);
+ rc = -ENOSYS;
+ }
+
+ if ( xch )
+ xc_interface_close(xch);
+
+ return rc;
+}
--
2.14.1
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