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https://github.com/sheumann/hush.git
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Signed-off-by: Paul B. Henson <henson@acm.org> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
328 lines
10 KiB
C
328 lines
10 KiB
C
/* Ported to busybox from mtd-utils.
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*
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* Licensed under GPLv2, see file LICENSE in this source tree.
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*/
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//config:config UBIATTACH
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//config: bool "ubiattach"
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//config: default y
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//config: select PLATFORM_LINUX
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//config: help
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//config: Attach MTD device to an UBI device.
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//config:
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//config:config UBIDETACH
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//config: bool "ubidetach"
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//config: default y
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//config: select PLATFORM_LINUX
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//config: help
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//config: Detach MTD device from an UBI device.
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//config:
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//config:config UBIMKVOL
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//config: bool "ubimkvol"
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//config: default y
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//config: select PLATFORM_LINUX
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//config: help
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//config: Create a UBI volume.
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//config:
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//config:config UBIRMVOL
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//config: bool "ubirmvol"
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//config: default y
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//config: select PLATFORM_LINUX
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//config: help
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//config: Delete a UBI volume.
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//config:
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//config:config UBIRSVOL
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//config: bool "ubirsvol"
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//config: default y
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//config: select PLATFORM_LINUX
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//config: help
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//config: Resize a UBI volume.
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//config:
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//config:config UBIUPDATEVOL
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//config: bool "ubiupdatevol"
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//config: default y
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//config: select PLATFORM_LINUX
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//config: help
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//config: Update a UBI volume.
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//applet:IF_UBIATTACH(APPLET_ODDNAME(ubiattach, ubi_tools, BB_DIR_USR_SBIN, BB_SUID_DROP, ubiattach))
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//applet:IF_UBIDETACH(APPLET_ODDNAME(ubidetach, ubi_tools, BB_DIR_USR_SBIN, BB_SUID_DROP, ubidetach))
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//applet:IF_UBIMKVOL(APPLET_ODDNAME(ubimkvol, ubi_tools, BB_DIR_USR_SBIN, BB_SUID_DROP, ubimkvol))
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//applet:IF_UBIRMVOL(APPLET_ODDNAME(ubirmvol, ubi_tools, BB_DIR_USR_SBIN, BB_SUID_DROP, ubirmvol))
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//applet:IF_UBIRSVOL(APPLET_ODDNAME(ubirsvol, ubi_tools, BB_DIR_USR_SBIN, BB_SUID_DROP, ubirsvol))
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//applet:IF_UBIUPDATEVOL(APPLET_ODDNAME(ubiupdatevol, ubi_tools, BB_DIR_USR_SBIN, BB_SUID_DROP, ubiupdatevol))
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//kbuild:lib-$(CONFIG_UBIATTACH) += ubi_tools.o
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//kbuild:lib-$(CONFIG_UBIDETACH) += ubi_tools.o
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//kbuild:lib-$(CONFIG_UBIMKVOL) += ubi_tools.o
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//kbuild:lib-$(CONFIG_UBIRMVOL) += ubi_tools.o
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//kbuild:lib-$(CONFIG_UBIRSVOL) += ubi_tools.o
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//kbuild:lib-$(CONFIG_UBIUPDATEVOL) += ubi_tools.o
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#include "libbb.h"
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/* Some versions of kernel have broken headers, need this hack */
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#ifndef __packed
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# define __packed __attribute__((packed))
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#endif
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#include <mtd/ubi-user.h>
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#define do_attach (ENABLE_UBIATTACH && applet_name[3] == 'a')
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#define do_detach (ENABLE_UBIDETACH && applet_name[3] == 'd')
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#define do_mkvol (ENABLE_UBIMKVOL && applet_name[3] == 'm')
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#define do_rmvol (ENABLE_UBIRMVOL && applet_name[4] == 'm')
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#define do_rsvol (ENABLE_UBIRSVOL && applet_name[4] == 's')
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#define do_update (ENABLE_UBIUPDATEVOL && applet_name[3] == 'u')
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static unsigned get_num_from_file(const char *path, unsigned max, const char *errmsg)
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{
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char buf[sizeof(long long)*3];
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unsigned long long num;
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if (open_read_close(path, buf, sizeof(buf)) < 0)
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bb_perror_msg_and_die(errmsg, path);
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/* It can be \n terminated, xatoull won't work well */
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if (sscanf(buf, "%llu", &num) != 1 || num > max)
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bb_error_msg_and_die(errmsg, path);
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return num;
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}
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/* To prevent malloc(1G) accidents */
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#define MAX_SANE_ERASEBLOCK (16*1024*1024)
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int ubi_tools_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int ubi_tools_main(int argc UNUSED_PARAM, char **argv)
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{
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static const struct suffix_mult size_suffixes[] = {
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{ "KiB", 1024 },
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{ "MiB", 1024*1024 },
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{ "GiB", 1024*1024*1024 },
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{ "", 0 }
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};
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unsigned opts;
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char *ubi_ctrl;
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int fd;
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int mtd_num;
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int dev_num = UBI_DEV_NUM_AUTO;
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int vol_id = UBI_VOL_NUM_AUTO;
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char *vol_name;
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unsigned long long size_bytes = size_bytes; /* for compiler */
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char *size_bytes_str;
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int alignment = 1;
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char *type;
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union {
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struct ubi_attach_req attach_req;
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struct ubi_mkvol_req mkvol_req;
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struct ubi_rsvol_req rsvol_req;
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} req_structs;
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#define attach_req req_structs.attach_req
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#define mkvol_req req_structs.mkvol_req
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#define rsvol_req req_structs.rsvol_req
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char path[sizeof("/sys/class/ubi/ubi%d_%d/usable_eb_size")
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+ 2 * sizeof(int)*3 + /*just in case:*/ 16];
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#define path_sys_class_ubi_ubi (path + sizeof("/sys/class/ubi/ubi")-1)
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strcpy(path, "/sys/class/ubi/ubi");
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memset(&req_structs, 0, sizeof(req_structs));
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if (do_mkvol) {
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opt_complementary = "-1:d+:n+:a+";
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opts = getopt32(argv, "md:n:N:s:a:t:",
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&dev_num, &vol_id,
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&vol_name, &size_bytes_str, &alignment, &type
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);
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} else {
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opt_complementary = "-1:m+:d+:n+:a+";
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opts = getopt32(argv, "m:d:n:N:s:a:t:",
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&mtd_num, &dev_num, &vol_id,
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&vol_name, &size_bytes_str, &alignment, &type
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);
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}
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#define OPTION_m (1 << 0)
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#define OPTION_d (1 << 1)
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#define OPTION_n (1 << 2)
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#define OPTION_N (1 << 3)
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#define OPTION_s (1 << 4)
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#define OPTION_a (1 << 5)
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#define OPTION_t (1 << 6)
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if (opts & OPTION_s)
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size_bytes = xatoull_sfx(size_bytes_str, size_suffixes);
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argv += optind;
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ubi_ctrl = *argv++;
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fd = xopen(ubi_ctrl, O_RDWR);
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//xfstat(fd, &st, ubi_ctrl);
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//if (!S_ISCHR(st.st_mode))
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// bb_error_msg_and_die("%s: not a char device", ubi_ctrl);
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//usage:#define ubiattach_trivial_usage
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//usage: "-m MTD_NUM [-d UBI_NUM] UBI_CTRL_DEV"
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//usage:#define ubiattach_full_usage "\n\n"
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//usage: "Attach MTD device to UBI\n"
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//usage: "\n -m MTD_NUM MTD device number to attach"
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//usage: "\n -d UBI_NUM UBI device number to assign"
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if (do_attach) {
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if (!(opts & OPTION_m))
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bb_error_msg_and_die("%s device not specified", "MTD");
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attach_req.mtd_num = mtd_num;
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attach_req.ubi_num = dev_num;
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xioctl(fd, UBI_IOCATT, &attach_req);
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} else
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//usage:#define ubidetach_trivial_usage
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//usage: "-d UBI_NUM UBI_CTRL_DEV"
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//usage:#define ubidetach_full_usage "\n\n"
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//usage: "Detach MTD device from UBI\n"
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//usage: "\n -d UBI_NUM UBI device number"
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if (do_detach) {
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if (!(opts & OPTION_d))
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bb_error_msg_and_die("%s device not specified", "UBI");
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/* FIXME? kernel expects int32_t* here: */
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xioctl(fd, UBI_IOCDET, &dev_num);
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} else
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//usage:#define ubimkvol_trivial_usage
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//usage: "UBI_DEVICE -N NAME [-s SIZE | -m]"
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//usage:#define ubimkvol_full_usage "\n\n"
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//usage: "Create UBI volume\n"
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//usage: "\n -a ALIGNMENT Volume alignment (default 1)"
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//usage: "\n -m Set volume size to maximum available"
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//usage: "\n -n VOLID Volume ID. If not specified,"
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//usage: "\n assigned automatically"
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//usage: "\n -N NAME Volume name"
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//usage: "\n -s SIZE Size in bytes"
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//usage: "\n -t TYPE Volume type (static|dynamic)"
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if (do_mkvol) {
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if (opts & OPTION_m) {
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unsigned leb_avail;
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unsigned leb_size;
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unsigned num;
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char *p;
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if (sscanf(ubi_ctrl, "/dev/ubi%u", &num) != 1)
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bb_error_msg_and_die("wrong format of UBI device name");
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p = path_sys_class_ubi_ubi + sprintf(path_sys_class_ubi_ubi, "%u/", num);
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strcpy(p, "avail_eraseblocks");
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leb_avail = get_num_from_file(path, UINT_MAX, "Can't get available eraseblocks from '%s'");
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strcpy(p, "eraseblock_size");
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leb_size = get_num_from_file(path, MAX_SANE_ERASEBLOCK, "Can't get eraseblock size from '%s'");
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size_bytes = leb_avail * (unsigned long long)leb_size;
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//if (size_bytes <= 0)
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// bb_error_msg_and_die("%s invalid maximum size calculated", "UBI");
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} else
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if (!(opts & OPTION_s))
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bb_error_msg_and_die("size not specified");
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if (!(opts & OPTION_N))
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bb_error_msg_and_die("name not specified");
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mkvol_req.vol_id = vol_id;
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mkvol_req.vol_type = UBI_DYNAMIC_VOLUME;
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if ((opts & OPTION_t) && type[0] == 's')
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mkvol_req.vol_type = UBI_STATIC_VOLUME;
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mkvol_req.alignment = alignment;
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mkvol_req.bytes = size_bytes; /* signed int64_t */
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strncpy(mkvol_req.name, vol_name, UBI_MAX_VOLUME_NAME);
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mkvol_req.name_len = strlen(vol_name);
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if (mkvol_req.name_len > UBI_MAX_VOLUME_NAME)
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bb_error_msg_and_die("volume name too long: '%s'", vol_name);
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xioctl(fd, UBI_IOCMKVOL, &mkvol_req);
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} else
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//usage:#define ubirmvol_trivial_usage
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//usage: "UBI_DEVICE -n VOLID"
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//usage:#define ubirmvol_full_usage "\n\n"
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//usage: "Remove UBI volume\n"
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//usage: "\n -n VOLID Volume ID"
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if (do_rmvol) {
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if (!(opts & OPTION_n))
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bb_error_msg_and_die("volume id not specified");
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/* FIXME? kernel expects int32_t* here: */
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xioctl(fd, UBI_IOCRMVOL, &vol_id);
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} else
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//usage:#define ubirsvol_trivial_usage
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//usage: "UBI_DEVICE -n VOLID -s SIZE"
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//usage:#define ubirsvol_full_usage "\n\n"
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//usage: "Resize UBI volume\n"
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//usage: "\n -n VOLID Volume ID"
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//usage: "\n -s SIZE Size in bytes"
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if (do_rsvol) {
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if (!(opts & OPTION_s))
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bb_error_msg_and_die("size not specified");
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if (!(opts & OPTION_n))
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bb_error_msg_and_die("volume id not specified");
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rsvol_req.bytes = size_bytes; /* signed int64_t */
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rsvol_req.vol_id = vol_id;
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xioctl(fd, UBI_IOCRSVOL, &rsvol_req);
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} else
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//usage:#define ubiupdatevol_trivial_usage
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//usage: "UBI_DEVICE [-t | [-s SIZE] IMG_FILE]"
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//usage:#define ubiupdatevol_full_usage "\n\n"
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//usage: "Update UBI volume\n"
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//usage: "\n -t Truncate to zero size"
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//usage: "\n -s SIZE Size in bytes to resize to"
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if (do_update) {
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int64_t bytes64;
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if (opts & OPTION_t) {
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/* truncate the volume by starting an update for size 0 */
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bytes64 = 0;
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/* this ioctl expects int64_t* parameter */
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xioctl(fd, UBI_IOCVOLUP, &bytes64);
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}
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else {
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struct stat st;
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unsigned ubinum, volnum;
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unsigned leb_size;
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ssize_t len;
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char *input_data;
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/* Assume that device is in normal format. */
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/* Removes need for scanning sysfs tree as full libubi does. */
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if (sscanf(ubi_ctrl, "/dev/ubi%u_%u", &ubinum, &volnum) != 2)
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bb_error_msg_and_die("wrong format of UBI device name");
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sprintf(path_sys_class_ubi_ubi, "%u_%u/usable_eb_size", ubinum, volnum);
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leb_size = get_num_from_file(path, MAX_SANE_ERASEBLOCK, "Can't get usable eraseblock size from '%s'");
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if (!(opts & OPTION_s)) {
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if (!*argv)
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bb_show_usage();
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xstat(*argv, &st);
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size_bytes = st.st_size;
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xmove_fd(xopen(*argv, O_RDONLY), STDIN_FILENO);
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}
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bytes64 = size_bytes;
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/* this ioctl expects signed int64_t* parameter */
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xioctl(fd, UBI_IOCVOLUP, &bytes64);
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input_data = xmalloc(leb_size);
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while ((len = full_read(STDIN_FILENO, input_data, leb_size)) > 0) {
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xwrite(fd, input_data, len);
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}
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if (len < 0)
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bb_perror_msg_and_die("UBI volume update failed");
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}
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}
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if (ENABLE_FEATURE_CLEAN_UP)
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close(fd);
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return EXIT_SUCCESS;
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}
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