[PATCH v4 4/5] fs/erofs: add filesystem commands

[Huang Jianan]

Add 'ls' and 'load' commands.

Signed-off-by: Huang Jianan <jnhuang95 at gmail.com>
---
 MAINTAINERS  |  1 +
 cmd/Kconfig  |  6 ++++++
 cmd/Makefile |  1 +
 cmd/erofs.c  | 42 ++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 50 insertions(+)
 create mode 100644 cmd/erofs.c

diff --git a/MAINTAINERS b/MAINTAINERS
index dd2ce8143c..bd8835619e 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -812,6 +812,7 @@ EROFS
 M:	Huang Jianan <jnhuang95 at gmail.com>
 L:	linux-erofs at lists.ozlabs.org
 S:	Maintained
+F:	cmd/erofs.c
 F:	fs/erofs/
 F:	include/erofs.h
 
diff --git a/cmd/Kconfig b/cmd/Kconfig
index 5e25e45fd2..50b8f33434 100644
--- a/cmd/Kconfig
+++ b/cmd/Kconfig
@@ -2176,6 +2176,12 @@ config CMD_CRAMFS
 	     cramfsls   - lists files in a cramfs image
 	     cramfsload - loads a file from a cramfs image
 
+config CMD_EROFS
+	bool "EROFS command support"
+	select FS_EROFS
+	help
+	  Support for the EROFS fs
+
 config CMD_EXT2
 	bool "ext2 command support"
 	select FS_EXT4
diff --git a/cmd/Makefile b/cmd/Makefile
index 166c652d98..d668b3c62d 100644
--- a/cmd/Makefile
+++ b/cmd/Makefile
@@ -60,6 +60,7 @@ obj-$(CONFIG_CMD_EEPROM) += eeprom.o
 obj-$(CONFIG_EFI) += efi.o
 obj-$(CONFIG_CMD_EFIDEBUG) += efidebug.o
 obj-$(CONFIG_CMD_ELF) += elf.o
+obj-$(CONFIG_CMD_EROFS) += erofs.o
 obj-$(CONFIG_HUSH_PARSER) += exit.o
 obj-$(CONFIG_CMD_EXT4) += ext4.o
 obj-$(CONFIG_CMD_EXT2) += ext2.o
diff --git a/cmd/erofs.c b/cmd/erofs.c
new file mode 100644
index 0000000000..add80b8b59
--- /dev/null
+++ b/cmd/erofs.c
@@ -0,0 +1,42 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2022 Huang Jianan <jnhuang95 at gmail.com>
+ *
+ * Author: Huang Jianan <jnhuang95 at gmail.com>
+ *
+ * erofs.c:	implements EROFS related commands
+ */
+
+#include <command.h>
+#include <fs.h>
+#include <erofs.h>
+
+static int do_erofs_ls(struct cmd_tbl *cmdtp, int flag, int argc, char * const argv[])
+{
+	return do_ls(cmdtp, flag, argc, argv, FS_TYPE_EROFS);
+}
+
+U_BOOT_CMD(erofsls, 4, 1, do_erofs_ls,
+	   "List files in directory. Default: root (/).",
+	   "<interface> [<dev[:part]>] [directory]\n"
+	   "    - list files from 'dev' on 'interface' in 'directory'\n"
+);
+
+static int do_erofs_load(struct cmd_tbl *cmdtp, int flag, int argc, char * const argv[])
+{
+	return do_load(cmdtp, flag, argc, argv, FS_TYPE_EROFS);
+}
+
+U_BOOT_CMD(erofsload, 7, 0, do_erofs_load,
+	   "load binary file from a EROFS filesystem",
+	   "<interface> [<dev[:part]> [<addr> [<filename> [bytes [pos]]]]]\n"
+	   "    - Load binary file 'filename' from 'dev' on 'interface'\n"
+	   "      to address 'addr' from EROFS filesystem.\n"
+	   "      'pos' gives the file position to start loading from.\n"
+	   "      If 'pos' is omitted, 0 is used. 'pos' requires 'bytes'.\n"
+	   "      'bytes' gives the size to load. If 'bytes' is 0 or omitted,\n"
+	   "      the load stops on end of file.\n"
+	   "      If either 'pos' or 'bytes' are not aligned to\n"
+	   "      ARCH_DMA_MINALIGN then a misaligned buffer warning will\n"
+	   "      be printed and performance will suffer for the load."
+);
-- 
2.25.1