fs/squashfs: add filesystem commands

Add 'ls' and 'load' commands.
Signed-off-by: Joao Marcos Costa <joaomarcos.costa@bootlin.com>

MAINTAINERS

@@ -974,6 +974,7 @@ M:	Joao Marcos Costa <joaomarcos.costa@bootlin.com>
 S:	Maintained
 F:	fs/squashfs/
 F:	include/sqfs.h
+F:	cmd/sqfs.c
 
 TARGET_BCMNS3
 M:	Bharat Gooty <bharat.gooty@broadcom.com>

cmd/Kconfig

@@ -2090,6 +2090,12 @@ 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

cmd/Makefile

@@ -63,6 +63,7 @@ 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

cmd/sqfs.c

+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2020 Bootlin
+ *
+ * Author: Joao Marcos Costa <joaomarcos.costa@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."
+);