diff mbox series

[ndctl,v1,05/10] daxctl: add command to enable devdax device

Message ID 20200403205900.18035-6-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 'enable-device' command, required prior to
reconfiguration of the dax device.

Mimics the same functionality as seen in
ndctl-enable-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  | 40 ++++++++++++++++++++++++++++++++++++++++
 3 files changed, 42 insertions(+)
diff mbox series

Patch

diff --git a/daxctl/builtin.h b/daxctl/builtin.h
index c9848953bbd8..8f344f86ad20 100644
--- a/daxctl/builtin.h
+++ b/daxctl/builtin.h
@@ -8,6 +8,7 @@  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_enable_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 1707a9ff0791..a4699b3780bd 100644
--- a/daxctl/daxctl.c
+++ b/daxctl/daxctl.c
@@ -75,6 +75,7 @@  static struct cmd_struct commands[] = {
 	{ "online-memory", .d_fn = cmd_online_memory },
 	{ "offline-memory", .d_fn = cmd_offline_memory },
 	{ "disable-device", .d_fn = cmd_disable_device },
+	{ "enable-device", .d_fn = cmd_enable_device },
 };
 
 int main(int argc, const char **argv)
diff --git a/daxctl/device.c b/daxctl/device.c
index 7a49852f78f4..596b6efca34d 100644
--- a/daxctl/device.c
+++ b/daxctl/device.c
@@ -48,6 +48,7 @@  enum device_action {
 	ACTION_ONLINE,
 	ACTION_OFFLINE,
 	ACTION_DISABLE,
+	ACTION_ENABLE,
 };
 
 #define BASE_OPTIONS() \
@@ -90,6 +91,11 @@  static const struct option disable_options[] = {
 	OPT_END(),
 };
 
+static const struct option enable_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)
@@ -119,6 +125,9 @@  static const char *parse_device_options(int argc, const char **argv,
 		case ACTION_DISABLE:
 			action_string = "disable";
 			break;
+		case ACTION_ENABLE:
+			action_string = "enable";
+			break;
 		default:
 			action_string = "<>";
 			break;
@@ -172,6 +181,7 @@  static const char *parse_device_options(int argc, const char **argv,
 		/* fall through */
 	case ACTION_OFFLINE:
 	case ACTION_DISABLE:
+	case ACTION_ENABLE:
 		/* nothing special */
 		break;
 	}
@@ -515,6 +525,14 @@  static int do_xble(struct daxctl_dev *dev, enum device_action action)
 	}
 
 	switch (action) {
+	case ACTION_ENABLE:
+		rc = daxctl_dev_enable_devdax(dev);
+		if (rc) {
+			fprintf(stderr, "%s: enable failed: %s\n",
+				daxctl_dev_get_devname(dev), strerror(-rc));
+			return rc;
+		}
+		break;
 	case ACTION_DISABLE:
 		rc = daxctl_dev_disable(dev);
 		if (rc) {
@@ -564,6 +582,11 @@  static int do_xaction_device(const char *device, enum device_action action,
 				if (rc == 0)
 					(*processed)++;
 				break;
+			case ACTION_ENABLE:
+				rc = do_xble(dev, action);
+				if (rc == 0)
+					(*processed)++;
+				break;
 			case ACTION_DISABLE:
 				rc = do_xble(dev, action);
 				if (rc == 0)
@@ -621,6 +644,23 @@  int cmd_disable_device(int argc, const char **argv, struct daxctl_ctx *ctx)
 	return rc;
 }
 
+int cmd_enable_device(int argc, const char **argv, struct daxctl_ctx *ctx)
+{
+	char *usage = "daxctl enable-device <device>";
+	const char *device = parse_device_options(argc, argv, ACTION_DISABLE,
+			enable_options, usage, ctx);
+	int processed, rc;
+
+	rc = do_xaction_device(device, ACTION_ENABLE, ctx, &processed);
+	if (rc < 0)
+		fprintf(stderr, "error enabling device: %s\n",
+				strerror(-rc));
+
+	fprintf(stderr, "enabled %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>]";