btrfs device remove alias

index b93bb33028f2..284dc87bc464 100644
@@ -1327,7 +1327,7 @@ const struct cmd_group filesystem_cmd_group = {
 		{ "show", cmd_show, cmd_show_usage, NULL, 0 },
 		{ "sync", cmd_sync, cmd_sync_usage, NULL, 0 },
 		{ "defragment", cmd_defrag, cmd_defrag_usage, NULL, 0 },
-		{ "balance", cmd_balance, NULL, &balance_cmd_group, 1 },
+		{ "balance", cmd_balance, NULL, &balance_cmd_group, CMD_HIDDEN },
 		{ "resize", cmd_resize, cmd_resize_usage, NULL, 0 },
 		{ "label", cmd_label, cmd_label_usage, NULL, 0 },
 		{ "usage", cmd_filesystem_usage,

index bd23340d45ae..42d31781f1a3 100644
@@ -17,6 +17,10 @@
 #ifndef __BTRFS_COMMANDS_H__
 #define __BTRFS_COMMANDS_H__
 
+enum {
+	CMD_HIDDEN = (1 << 0),	/* should not be in help listings */
+};
+
 struct cmd_struct {
 	const char *token;
 	int (*fn)(int, char **);

@@ -47,8 +51,8 @@ struct cmd_struct {
 	/* should be NULL if token is not a subgroup */
 	const struct cmd_group *next;
 
-	/* if true don't list this token in help listings */
-	int hidden;
+	/* CMD_* flags above */
+	int flags;
 };
 
 #define NULL_CMD_STRUCT {NULL, NULL, NULL, NULL, 0}

index 56aaf9c3c64c..34754c16e6fe 100644
@@ -133,7 +133,7 @@ static void usage_command_group_internal(const struct cmd_group *grp, int full,
 	int do_sep = 0;
 
 	for (; cmd->token; cmd++) {
-		if (cmd->hidden)
+		if (cmd->flags & CMD_HIDDEN)
 			continue;
 
 		if (full && cmd != grp->commands)

index 1022656988c2..6972156fdf70 100644
@@ -144,20 +144,14 @@ error_out:
 	return !!ret;
 }
 
-static const char * const cmd_rm_dev_usage[] = {
-	"btrfs device delete <device> [<device>...] <path>",
-	"Remove a device from a filesystem",
-	NULL
-};
-
-static int cmd_rm_dev(int argc, char **argv)
+static int _cmd_rm_dev(int argc, char **argv, const char * const *usagestr)
 {
 	char	*mntpnt;
 	int	i, fdmnt, ret=0, e;
 	DIR	*dirstream = NULL;
 
 	if (check_argc_min(argc, 3))
-		usage(cmd_rm_dev_usage);
+		usage(usagestr);
 
 	mntpnt = argv[argc - 1];
 

@@ -198,6 +192,28 @@ static int cmd_rm_dev(int argc, char **argv)
 	return !!ret;
 }
 
+static const char * const cmd_rm_dev_usage[] = {
+	"btrfs device remove <device> [<device>...] <path>",
+	"Remove a device from a filesystem",
+	NULL
+};
+
+static int cmd_rm_dev(int argc, char **argv)
+{
+	return _cmd_rm_dev(argc, argv, cmd_rm_dev_usage);
+}
+
+static const char * const cmd_del_dev_usage[] = {
+	"btrfs device delete <device> [<device>...] <path>",
+	"Remove a device from a filesystem",
+	NULL
+};
+
+static int cmd_del_dev(int argc, char **argv)
+{
+	return _cmd_rm_dev(argc, argv, cmd_del_dev_usage);
+}
+
 static const char * const cmd_scan_dev_usage[] = {
 	"btrfs device scan [(-d|--all-devices)|<device> [<device>...]]",
 	"Scan devices for a btrfs filesystem",

@@ -586,7 +602,8 @@ out:
 const struct cmd_group device_cmd_group = {
 	device_cmd_group_usage, NULL, {
 		{ "add", cmd_add_dev, cmd_add_dev_usage, NULL, 0 },
-		{ "delete", cmd_rm_dev, cmd_rm_dev_usage, NULL, 0 },
+		{ "delete", cmd_del_dev, cmd_del_dev_usage, NULL, CMD_ALIAS },
+		{ "remove", cmd_rm_dev, cmd_rm_dev_usage, NULL, 0 },
 		{ "scan", cmd_scan_dev, cmd_scan_dev_usage, NULL, 0 },
 		{ "ready", cmd_ready_dev, cmd_ready_dev_usage, NULL, 0 },
 		{ "stats", cmd_dev_stats, cmd_dev_stats_usage, NULL, 0 },

index 42d31781f1a3..90bbd05a3542 100644
@@ -19,6 +19,7 @@
 
 enum {
 	CMD_HIDDEN = (1 << 0),	/* should not be in help listings */
+	CMD_ALIAS = (1 << 1),	/* alias of next command in cmd_group */
 };
 
 struct cmd_struct {

index 34754c16e6fe..6ecf01d57b83 100644
@@ -81,11 +81,13 @@ static int do_usage_one_command(const char * const *usagestr,
 
 static int usage_command_internal(const char * const *usagestr,
 				  const char *token, int full, int lst,
-				  FILE *outf)
+				  int alias, FILE *outf)
 {
-	unsigned int flags = USAGE_SHORT;
+	unsigned int flags = 0;
 	int ret;
 
+	if (!alias)
+		flags |= USAGE_SHORT;
 	if (full)
 		flags |= USAGE_LONG | USAGE_OPTIONS;
 	if (lst)

@@ -110,7 +112,7 @@ static void usage_command_usagestr(const char * const *usagestr,
 	FILE *outf = err ? stderr : stdout;
 	int ret;
 
-	ret = usage_command_internal(usagestr, token, full, 0, outf);
+	ret = usage_command_internal(usagestr, token, full, 0, 0, outf);
 	if (!ret)
 		fputc('\n', outf);
 }

@@ -146,7 +148,7 @@ static void usage_command_group_internal(const struct cmd_group *grp, int full,
 			}
 
 			usage_command_internal(cmd->usagestr, cmd->token, full,
-					       1, outf);
+					       1, cmd->flags & CMD_ALIAS, outf);
 			continue;
 		}