[PATCH v3 2/5] fs/squashfs: add filesystem commands

[Joao Marcos Costa]

Add 'ls' and 'load' commands.

Signed-off-by: Joao Marcos Costa <joaomarcos.costa at bootlin.com>
---
Changes in v3:
	- No changes since v2.
Changes in v2:
	- Add info. to MAINTAINERS
	- Add 'static' keyword to do_sqfs_*(). These functions' prototypes
	are no longer needed in include/fs.h.
	- Change commit message.
 MAINTAINERS  |  1 +
 cmd/Kconfig  |  6 ++++++
 cmd/Makefile |  1 +
 cmd/sqfs.c   | 42 ++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 50 insertions(+)
 create mode 100644 cmd/sqfs.c

diff --git a/MAINTAINERS b/MAINTAINERS
index 198fe2b89e..9a5f330148 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -949,6 +949,7 @@ M:	Joao Marcos Costa <joaomarcos.costa at bootlin.com>
 S:	Maintained
 F:	fs/squashfs/
 F:	include/sqfs.h
+F:	cmd/sqfs.c
 
 TDA19988 HDMI ENCODER
 M:	Liviu Dudau <liviu.dudau at foss.arm.com>
diff --git a/cmd/Kconfig b/cmd/Kconfig
index bfe6c163dc..c8f3d34b88 100644
--- a/cmd/Kconfig
+++ b/cmd/Kconfig
@@ -2059,6 +2059,12 @@ config CMD_FAT
 	help
 	  Support for the FAT fs
 
+config CMD_SQUASHFS
+	bool "SquashFS command support"
+	select FS_SQUASHFS
+	help
+	  Enables SquashFS filesystem commands (e.g. load, ls).
+
 config CMD_FS_GENERIC
 	bool "filesystem commands"
 	help
diff --git a/cmd/Makefile b/cmd/Makefile
index 7952138dc2..ef2da1c928 100644
--- a/cmd/Makefile
+++ b/cmd/Makefile
@@ -62,6 +62,7 @@ obj-$(CONFIG_CMD_EXT4) += ext4.o
 obj-$(CONFIG_CMD_EXT2) += ext2.o
 obj-$(CONFIG_CMD_FAT) += fat.o
 obj-$(CONFIG_CMD_FDT) += fdt.o
+obj-$(CONFIG_CMD_SQUASHFS) += sqfs.o
 obj-$(CONFIG_CMD_FLASH) += flash.o
 obj-$(CONFIG_CMD_FPGA) += fpga.o
 obj-$(CONFIG_CMD_FPGAD) += fpgad.o
diff --git a/cmd/sqfs.c b/cmd/sqfs.c
new file mode 100644
index 0000000000..107038c4cf
--- /dev/null
+++ b/cmd/sqfs.c
@@ -0,0 +1,42 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2020 Bootlin
+ *
+ * Author: Joao Marcos Costa <joaomarcos.costa at bootlin.com>
+ *
+ * squashfs.c:	implements SquashFS related commands
+ */
+
+#include <command.h>
+#include <fs.h>
+#include <squashfs.h>
+
+static int do_sqfs_ls(struct cmd_tbl *cmdtp, int flag, int argc, char * const argv[])
+{
+	return do_ls(cmdtp, flag, argc, argv, FS_TYPE_SQUASHFS);
+}
+
+U_BOOT_CMD(sqfsls, 4, 1, do_sqfs_ls,
+	   "List files in directory. Default: root (/).",
+	   "<interface> [<dev[:part]>] [directory]\n"
+	   "    - list files from 'dev' on 'interface' in 'directory'\n"
+);
+
+static int do_sqfs_load(struct cmd_tbl *cmdtp, int flag, int argc, char * const argv[])
+{
+	return do_load(cmdtp, flag, argc, argv, FS_TYPE_SQUASHFS);
+}
+
+U_BOOT_CMD(sqfsload, 7, 0, do_sqfs_load,
+	   "load binary file from a SquashFS filesystem",
+	   "<interface> [<dev[:part]> [<addr> [<filename> [bytes [pos]]]]]\n"
+	   "    - Load binary file 'filename' from 'dev' on 'interface'\n"
+	   "      to address 'addr' from SquashFS 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."
+);
-- 
2.17.1