diff mbox series

[ndctl,v1,04/10] daxctl: add command to disable devdax device

Message ID 20200403205900.18035-5-joao.m.martins@oracle.com (mailing list archive)
State New, archived
Headers show
Series daxctl: Support for sub-dividing soft-reserved regions | expand

Commit Message

Joao Martins April 3, 2020, 8:58 p.m. UTC 
Add a 'disable-device' command, required prior to
reconfiguration or destruction of the dax device.

Mimmics the same functionality as seen in
ndctl-disable-namespace.

Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
---
 daxctl/builtin.h |  1 +
 daxctl/daxctl.c  |  1 +
 daxctl/device.c  | 61 ++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 63 insertions(+)
diff mbox series

Patch

diff --git a/daxctl/builtin.h b/daxctl/builtin.h
index f5a0147f0e11..c9848953bbd8 100644
--- a/daxctl/builtin.h
+++ b/daxctl/builtin.h
@@ -7,6 +7,7 @@  struct daxctl_ctx;
 int cmd_list(int argc, const char **argv, struct daxctl_ctx *ctx);
 int cmd_migrate(int argc, const char **argv, struct daxctl_ctx *ctx);
 int cmd_reconfig_device(int argc, const char **argv, struct daxctl_ctx *ctx);
+int cmd_disable_device(int argc, const char **argv, struct daxctl_ctx *ctx);
 int cmd_online_memory(int argc, const char **argv, struct daxctl_ctx *ctx);
 int cmd_offline_memory(int argc, const char **argv, struct daxctl_ctx *ctx);
 #endif /* _DAXCTL_BUILTIN_H_ */
diff --git a/daxctl/daxctl.c b/daxctl/daxctl.c
index 1ab073200313..1707a9ff0791 100644
--- a/daxctl/daxctl.c
+++ b/daxctl/daxctl.c
@@ -74,6 +74,7 @@  static struct cmd_struct commands[] = {
 	{ "reconfigure-device", .d_fn = cmd_reconfig_device },
 	{ "online-memory", .d_fn = cmd_online_memory },
 	{ "offline-memory", .d_fn = cmd_offline_memory },
+	{ "disable-device", .d_fn = cmd_disable_device },
 };
 
 int main(int argc, const char **argv)
diff --git a/daxctl/device.c b/daxctl/device.c
index b483d2777ecb..7a49852f78f4 100644
--- a/daxctl/device.c
+++ b/daxctl/device.c
@@ -47,6 +47,7 @@  enum device_action {
 	ACTION_RECONFIG,
 	ACTION_ONLINE,
 	ACTION_OFFLINE,
+	ACTION_DISABLE,
 };
 
 #define BASE_OPTIONS() \
@@ -84,6 +85,11 @@  static const struct option offline_options[] = {
 	OPT_END(),
 };
 
+static const struct option disable_options[] = {
+	BASE_OPTIONS(),
+	OPT_END(),
+};
+
 static const char *parse_device_options(int argc, const char **argv,
 		enum device_action action, const struct option *options,
 		const char *usage, struct daxctl_ctx *ctx)
@@ -110,6 +116,9 @@  static const char *parse_device_options(int argc, const char **argv,
 		case ACTION_OFFLINE:
 			action_string = "offline memory for";
 			break;
+		case ACTION_DISABLE:
+			action_string = "disable";
+			break;
 		default:
 			action_string = "<>";
 			break;
@@ -162,6 +171,7 @@  static const char *parse_device_options(int argc, const char **argv,
 			mem_zone = MEM_ZONE_NORMAL;
 		/* fall through */
 	case ACTION_OFFLINE:
+	case ACTION_DISABLE:
 		/* nothing special */
 		break;
 	}
@@ -491,6 +501,35 @@  static int do_xline(struct daxctl_dev *dev, enum device_action action)
 	return rc;
 }
 
+static int do_xble(struct daxctl_dev *dev, enum device_action action)
+{
+	struct daxctl_memory *mem = daxctl_dev_get_memory(dev);
+	const char *devname = daxctl_dev_get_devname(dev);
+	int rc;
+
+	if (mem) {
+		fprintf(stderr,
+			"%s: status operations are only applicable in devdax mode\n",
+			devname);
+		return -ENXIO;
+	}
+
+	switch (action) {
+	case ACTION_DISABLE:
+		rc = daxctl_dev_disable(dev);
+		if (rc) {
+			fprintf(stderr, "%s: disable failed: %s\n",
+				daxctl_dev_get_devname(dev), strerror(-rc));
+			return rc;
+		}
+		break;
+	default:
+		fprintf(stderr, "%s: invalid action: %d\n", devname, action);
+		rc = -EINVAL;
+	}
+	return rc;
+}
+
 static int do_xaction_device(const char *device, enum device_action action,
 		struct daxctl_ctx *ctx, int *processed)
 {
@@ -525,6 +564,11 @@  static int do_xaction_device(const char *device, enum device_action action,
 				if (rc == 0)
 					(*processed)++;
 				break;
+			case ACTION_DISABLE:
+				rc = do_xble(dev, action);
+				if (rc == 0)
+					(*processed)++;
+				break;
 			default:
 				rc = -EINVAL;
 				break;
@@ -560,6 +604,23 @@  int cmd_reconfig_device(int argc, const char **argv, struct daxctl_ctx *ctx)
 	return rc;
 }
 
+int cmd_disable_device(int argc, const char **argv, struct daxctl_ctx *ctx)
+{
+	char *usage = "daxctl disable-device <device>";
+	const char *device = parse_device_options(argc, argv, ACTION_DISABLE,
+			disable_options, usage, ctx);
+	int processed, rc;
+
+	rc = do_xaction_device(device, ACTION_DISABLE, ctx, &processed);
+	if (rc < 0)
+		fprintf(stderr, "error disabling device: %s\n",
+				strerror(-rc));
+
+	fprintf(stderr, "disabled %d device%s\n", processed,
+			processed == 1 ? "" : "s");
+	return rc;
+}
+
 int cmd_online_memory(int argc, const char **argv, struct daxctl_ctx *ctx)
 {
 	char *usage = "daxctl online-memory <device> [<options>]";