cmd: Add the 'btrsubvol' command to list BTRFS subvolumes

Signed-off-by: Marek Behun <marek.behun@nic.cz> create mode 100644 cmd/btrfs.c

cmd: Add the 'btrsubvol' command to list BTRFS subvolumes
Signed-off-by: Marek Behun <marek.behun@nic.cz> create mode 100644 cmd/btrfs.c
Marek Behún · Tom Rini
1 parent 0c936ee319
Showing 3 changed files with 39 additions and 0 deletions Side-by-side Diff
cmd/Kconfig
cmd/Makefile
cmd/btrfs.c
@@ -1313,6 +1313,16 @@
 endmenu
  
 menu "Filesystem commands"
+config CMD_BTRFS
+	bool "Enable the 'btrsubvol' command"
+	select FS_BTRFS
+	help
+	  This enables the 'btrsubvol' command to list subvolumes
+	  of a BTRFS filesystem. There are no special commands for
+	  listing BTRFS directories or loading BTRFS files - this
+	  can be done by the generic 'fs' commands (see CMD_FS_GENERIC)
+	  when BTRFS is enabled (see FS_BTRFS).
+
 config CMD_CBFS
 	bool "Enable the 'cbfs' command"
 	depends on FS_CBFS
@@ -27,6 +27,7 @@
 obj-$(CONFIG_CMD_BOOTSTAGE) += bootstage.o
 obj-$(CONFIG_CMD_BOOTZ) += bootz.o
 obj-$(CONFIG_CMD_BOOTI) += booti.o
+obj-$(CONFIG_CMD_BTRFS) += btrfs.o
 obj-$(CONFIG_CMD_CACHE) += cache.o
 obj-$(CONFIG_CMD_CBFS) += cbfs.o
 obj-$(CONFIG_CMD_CLK) += clk.o
+/*
+ * 2017 by Marek Behun <marek.behun@nic.cz>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <command.h>
+#include <btrfs.h>
+#include <fs.h>
+
+int do_btrsubvol(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
+{
+	if (argc != 3)
+		return CMD_RET_USAGE;
+
+	if (fs_set_blk_dev(argv[1], argv[2], FS_TYPE_BTRFS))
+		return 1;
+
+	btrfs_list_subvols();
+	return 0;
+}
+
+U_BOOT_CMD(btrsubvol, 3, 1, do_btrsubvol,
+	"list subvolumes of a BTRFS filesystem",
+	"<interface> <dev[:part]>\n"
+	"     - List subvolumes of a BTRFS filesystem."
+)
...	...	@@ -1313,6 +1313,16 @@
1313	1313	endmenu
1314	1314
1315	1315	menu "Filesystem commands"
	1316	+config CMD_BTRFS
	1317	+ bool "Enable the 'btrsubvol' command"
	1318	+ select FS_BTRFS
	1319	+ help
	1320	+ This enables the 'btrsubvol' command to list subvolumes
	1321	+ of a BTRFS filesystem. There are no special commands for
	1322	+ listing BTRFS directories or loading BTRFS files - this
	1323	+ can be done by the generic 'fs' commands (see CMD_FS_GENERIC)
	1324	+ when BTRFS is enabled (see FS_BTRFS).
	1325	+
1316	1326	config CMD_CBFS
1317	1327	bool "Enable the 'cbfs' command"
1318	1328	depends on FS_CBFS
...	...	@@ -27,6 +27,7 @@
27	27	obj-$(CONFIG_CMD_BOOTSTAGE) += bootstage.o
28	28	obj-$(CONFIG_CMD_BOOTZ) += bootz.o
29	29	obj-$(CONFIG_CMD_BOOTI) += booti.o
	30	+obj-$(CONFIG_CMD_BTRFS) += btrfs.o
30	31	obj-$(CONFIG_CMD_CACHE) += cache.o
31	32	obj-$(CONFIG_CMD_CBFS) += cbfs.o
32	33	obj-$(CONFIG_CMD_CLK) += clk.o
	1	+/*
	2	+ * 2017 by Marek Behun <marek.behun@nic.cz>
	3	+ *
	4	+ * SPDX-License-Identifier: GPL-2.0+
	5	+ */
	6	+
	7	+#include <common.h>
	8	+#include <command.h>
	9	+#include <btrfs.h>
	10	+#include <fs.h>
	11	+
	12	+int do_btrsubvol(cmd_tbl_t cmdtp, int flag, int argc, char const argv[])
	13	+{
	14	+ if (argc != 3)
	15	+ return CMD_RET_USAGE;
	16	+
	17	+ if (fs_set_blk_dev(argv[1], argv[2], FS_TYPE_BTRFS))
	18	+ return 1;
	19	+
	20	+ btrfs_list_subvols();
	21	+ return 0;
	22	+}
	23	+
	24	+U_BOOT_CMD(btrsubvol, 3, 1, do_btrsubvol,
	25	+ "list subvolumes of a BTRFS filesystem",
	26	+ "<interface> <dev[:part]>\n"
	27	+ " - List subvolumes of a BTRFS filesystem."
	28	+)