[U-Boot] [PATCH 8/8 v2] UBIFS: Implement read-only UBIFS support in U-Boot (Part 8)

[Stefan Roese]

This patchset adds UBIFS read-only support to U-Boot. The following
commands are implemented:

- ubifsmount
  Mount an UBIFS volume

- ubifsls
  List a directory of the mounted UBIFS volume

- ubifsload
  Load a file from the mounted UBIFS volume to memory

The U-Boot UBIFS implementation is largely a direct copy from the current
Linux version (2.6.29-rc6). As already done in the UBI version we have an
"abstraction layer" to redefine or remove some OS calls (e.g. mutex_lock()
...). This makes it possible to use the original Linux code with very
little changes. And by this we can better update to later Linux versions.

I removed some of the Linux features that are not used in the U-Boot
version (e.g. garbage-collection, write support).

Signed-off-by: Stefan Roese <sr at denx.de>
CC: Artem Bityutskiy <dedekind at infradead.org>
CC: Adrian Hunter <ext-Adrian.Hunter at nokia.com>
---
Changes in v2:
- Now symbolic links are handled correctly

 common/Makefile    |    1 +
 common/cmd_ubifs.c |  132 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 fs/Makefile        |    1 +
 3 files changed, 134 insertions(+), 0 deletions(-)
 create mode 100644 common/cmd_ubifs.c

diff --git a/common/Makefile b/common/Makefile
index f13cd11..be94634 100644
--- a/common/Makefile
+++ b/common/Makefile
@@ -129,6 +129,7 @@ COBJS-$(CONFIG_CMD_SPI) += cmd_spi.o
 COBJS-$(CONFIG_CMD_STRINGS) += cmd_strings.o
 COBJS-$(CONFIG_CMD_TERMINAL) += cmd_terminal.o
 COBJS-$(CONFIG_CMD_UBI) += cmd_ubi.o
+COBJS-$(CONFIG_CMD_UBIFS) += cmd_ubifs.o
 COBJS-$(CONFIG_CMD_UNIVERSE) += cmd_universe.o
 ifdef CONFIG_CMD_USB
 COBJS-y += cmd_usb.o
diff --git a/common/cmd_ubifs.c b/common/cmd_ubifs.c
new file mode 100644
index 0000000..b2e0f4f
--- /dev/null
+++ b/common/cmd_ubifs.c
@@ -0,0 +1,132 @@
+/*
+ * (C) Copyright 2008
+ * Stefan Roese, DENX Software Engineering, sr at denx.de.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ *
+ */
+
+
+/*
+ * UBIFS command support
+ */
+
+#undef DEBUG
+
+#include <common.h>
+#include <config.h>
+#include <command.h>
+
+static int ubifs_initialized;
+static int ubifs_mounted;
+
+/* Prototypes */
+int ubifs_init(void);
+int ubifs_mount(char *vol_name);
+int ubifs_ls(char *dir_name);
+int ubifs_load(char *filename, u32 addr, u32 size);
+
+int do_ubifs_mount(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+{
+	char *vol_name;
+	int ret;
+
+	vol_name = argv[1];
+	debug("Using volume %s\n", vol_name);
+
+	if (ubifs_initialized == 0) {
+		ubifs_init();
+		ubifs_initialized = 1;
+	}
+
+	ret = ubifs_mount(vol_name);
+	if (ret)
+		return -1;
+
+	ubifs_mounted = 1;
+
+	return 0;
+}
+
+int do_ubifs_ls(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+{
+	char *filename = "/";
+	int ret;
+
+	if (!ubifs_mounted) {
+		printf("UBIFS not mounted, use ubifs mount to mount volume first!\n");
+		return -1;
+	}
+
+	if (argc == 2)
+		filename = argv[1];
+	debug("Using filename %s\n", filename);
+
+	ret = ubifs_ls(filename);
+	if (ret)
+		printf("%s not found!\n", filename);
+
+	return ret;
+}
+
+int do_ubifs_load(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+{
+	char *filename;
+	int ret;
+	u32 addr;
+	u32 size = 0;
+
+	if (!ubifs_mounted) {
+		printf("UBIFS not mounted, use ubifs mount to mount volume first!\n");
+		return -1;
+	}
+
+	if (argc < 3) {
+		printf("Usage:\n%s\n", cmdtp->usage);
+		return -1;
+	}
+
+	addr = simple_strtoul(argv[1], NULL, 16);
+	filename = argv[2];
+
+	if (argc == 4)
+		size = simple_strtoul(argv[3], NULL, 16);
+	debug("Loading file '%s' to address 0x%08x (size %d)\n", filename, addr, size);
+
+	ret = ubifs_load(filename, addr, size);
+	if (ret)
+		printf("%s not found!\n", filename);
+
+	return ret;
+}
+
+U_BOOT_CMD(
+	ubifsmount, 2, 0, do_ubifs_mount,
+	"ubifsmount- mount UBIFS volume\n",
+	"\n");
+
+U_BOOT_CMD(ubifsls, 2, 0, do_ubifs_ls,
+	   "ubifsls - list files in a directory\n",
+	   "[directory]\n"
+	   "    - list files in a 'directory' (default '/')\n");
+
+U_BOOT_CMD(ubifsload, 4, 0, do_ubifs_load,
+	   "ubifsload- load file from an UBIFS filesystem\n",
+	   "<addr> <filename> [bytes]\n"
+	   "    - load file 'filename' to address 'addr'\n");
diff --git a/fs/Makefile b/fs/Makefile
index 8bbd563..22aad12 100644
--- a/fs/Makefile
+++ b/fs/Makefile
@@ -29,6 +29,7 @@ subdirs-$(CONFIG_CMD_FDOS) += fdos
 subdirs-$(CONFIG_CMD_JFFS2) += jffs2
 subdirs-$(CONFIG_CMD_REISER) += reiserfs
 subdirs-$(CONFIG_YAFFS2) += yaffs2
+subdirs-$(CONFIG_CMD_UBIFS) += ubifs
 
 SUBDIRS	:= $(subdirs-y)
 
-- 
1.6.1.3