f4d8de48f5
Provide a way to use any host file or device as a block device in U-Boot. This can be used to provide filesystem access within U-Boot to an ext2 image file on the host, for example. The support is plumbed into the filesystem and partition interfaces. We don't want to print a message in the driver every time we find a missing device. Pass the information back to the caller where a message can be printed if desired. Signed-off-by: Henrik Nordström <henrik@henriknordstrom.net> Signed-off-by: Simon Glass <sjg@chromium.org> - Removed change to part.c get_device_and_partition() Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Simon Glass <sjg@chromium.org>
125 lines
3.0 KiB
C
125 lines
3.0 KiB
C
/*
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* Copyright (c) 2012, Google Inc.
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <fs.h>
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#include <part.h>
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#include <sandboxblockdev.h>
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#include <asm/errno.h>
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static int do_sandbox_load(cmd_tbl_t *cmdtp, int flag, int argc,
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char * const argv[])
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{
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return do_load(cmdtp, flag, argc, argv, FS_TYPE_SANDBOX);
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}
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static int do_sandbox_ls(cmd_tbl_t *cmdtp, int flag, int argc,
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char * const argv[])
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{
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return do_ls(cmdtp, flag, argc, argv, FS_TYPE_SANDBOX);
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}
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static int do_sandbox_save(cmd_tbl_t *cmdtp, int flag, int argc,
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char * const argv[])
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{
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return do_save(cmdtp, flag, argc, argv, FS_TYPE_SANDBOX);
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}
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static int do_sandbox_bind(cmd_tbl_t *cmdtp, int flag, int argc,
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char * const argv[])
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{
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if (argc < 2 || argc > 3)
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return CMD_RET_USAGE;
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char *ep;
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char *dev_str = argv[1];
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char *file = argc >= 3 ? argv[2] : NULL;
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int dev = simple_strtoul(dev_str, &ep, 16);
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if (*ep) {
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printf("** Bad device specification %s **\n", dev_str);
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return CMD_RET_USAGE;
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}
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return host_dev_bind(dev, file);
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}
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static int do_sandbox_info(cmd_tbl_t *cmdtp, int flag, int argc,
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char * const argv[])
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{
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if (argc < 1 || argc > 2)
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return CMD_RET_USAGE;
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int min_dev = 0;
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int max_dev = CONFIG_HOST_MAX_DEVICES - 1;
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if (argc >= 2) {
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char *ep;
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char *dev_str = argv[1];
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int dev = simple_strtoul(dev_str, &ep, 16);
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if (*ep) {
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printf("** Bad device specification %s **\n", dev_str);
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return CMD_RET_USAGE;
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}
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min_dev = dev;
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max_dev = dev;
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}
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int dev;
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printf("%3s %12s %s\n", "dev", "blocks", "path");
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for (dev = min_dev; dev <= max_dev; dev++) {
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block_dev_desc_t *blk_dev;
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int ret;
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printf("%3d ", dev);
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ret = host_get_dev_err(dev, &blk_dev);
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if (ret) {
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if (ret == -ENOENT)
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puts("Not bound to a backing file\n");
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else if (ret == -ENODEV)
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puts("Invalid host device number\n");
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continue;
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}
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struct host_block_dev *host_dev = blk_dev->priv;
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printf("%12lu %s\n", (unsigned long)blk_dev->lba,
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host_dev->filename);
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}
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return 0;
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}
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static cmd_tbl_t cmd_sandbox_sub[] = {
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U_BOOT_CMD_MKENT(load, 7, 0, do_sandbox_load, "", ""),
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U_BOOT_CMD_MKENT(ls, 3, 0, do_sandbox_ls, "", ""),
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U_BOOT_CMD_MKENT(save, 6, 0, do_sandbox_save, "", ""),
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U_BOOT_CMD_MKENT(bind, 3, 0, do_sandbox_bind, "", ""),
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U_BOOT_CMD_MKENT(info, 3, 0, do_sandbox_info, "", ""),
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};
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static int do_sandbox(cmd_tbl_t *cmdtp, int flag, int argc,
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char * const argv[])
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{
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cmd_tbl_t *c;
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/* Skip past 'sandbox' */
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argc--;
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argv++;
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c = find_cmd_tbl(argv[0], cmd_sandbox_sub,
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ARRAY_SIZE(cmd_sandbox_sub));
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if (c)
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return c->cmd(cmdtp, flag, argc, argv);
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else
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return CMD_RET_USAGE;
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}
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U_BOOT_CMD(
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sb, 8, 1, do_sandbox,
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"Miscellaneous sandbox commands",
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"load host <dev> <addr> <filename> [<bytes> <offset>] - "
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"load a file from host\n"
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"sb ls host <filename> - list files on host\n"
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"sb save host <dev> <filename> <addr> <bytes> [<offset>] - "
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"save a file to host\n"
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"sb bind <dev> [<filename>] - bind \"host\" device to file\n"
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"sb info [<dev>] - show device binding & info"
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);
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