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-rw-r--r--ubifs-utils/fsck.ubifs/fsck.ubifs.c259
1 files changed, 259 insertions, 0 deletions
diff --git a/ubifs-utils/fsck.ubifs/fsck.ubifs.c b/ubifs-utils/fsck.ubifs/fsck.ubifs.c
new file mode 100644
index 0000000..721976b
--- /dev/null
+++ b/ubifs-utils/fsck.ubifs/fsck.ubifs.c
@@ -0,0 +1,259 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2024, Huawei Technologies Co, Ltd.
+ *
+ * Authors: Zhihao Cheng <chengzhihao1@huawei.com>
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <getopt.h>
+#include <signal.h>
+
+#include "bitops.h"
+#include "kmem.h"
+#include "ubifs.h"
+#include "defs.h"
+#include "debug.h"
+#include "key.h"
+#include "misc.h"
+#include "fsck.ubifs.h"
+
+/*
+ * Because we copy functions from the kernel, we use a subset of the UBIFS
+ * file-system description object struct ubifs_info.
+ */
+struct ubifs_info info_;
+static struct ubifs_info *c = &info_;
+
+int exit_code = FSCK_OK;
+
+static const char *optstring = "Vrg:abyn";
+
+static const struct option longopts[] = {
+ {"version", 0, NULL, 'V'},
+ {"reserve", 1, NULL, 'r'},
+ {"debug", 1, NULL, 'g'},
+ {"auto", 1, NULL, 'a'},
+ {"rebuild", 1, NULL, 'b'},
+ {"yes", 1, NULL, 'y'},
+ {"nochange", 1, NULL, 'n'},
+ {NULL, 0, NULL, 0}
+};
+
+static const char *helptext =
+"Usage: fsck.ubifs [OPTIONS] ubi_volume\n"
+"Check & repair UBIFS filesystem on a given UBI volume\n\n"
+"Options:\n"
+"-V, --version Display version information\n"
+"-g, --debug=LEVEL Display debug information (0 - none, 1 - error message,\n"
+" 2 - warning message[default], 3 - notice message, 4 - debug message)\n"
+"-a, --auto Automatic safely repair without droping data (No questions).\n"
+" Can not be specified at the same time as the -y or -n options\n"
+"-y, --yes Assume \"yes\" to all questions. Automatic repair and report dropping data (No questions).\n"
+" There are two submodes for this working mode:\n"
+" a. default - Fail if TNC/master/log is corrupted. Only -y option is specified\n"
+" b. rebuild fs - Turn to rebuild fs if TNC/master/log is corrupted. Specify -b option to make effect\n"
+" Can not be specified at the same time as the -a or -n options\n"
+"-b, --rebuild Forcedly repair the filesystem even by rebuilding filesystem.\n"
+" Depends on -y option\n"
+"-n, --nochange Make no changes to the filesystem, only check filesystem.\n"
+" Can not be specified at the same time as the -a or -y options\n"
+"Examples:\n"
+"\t1. Check and repair filesystem from UBI volume /dev/ubi0_0\n"
+"\t fsck.ubifs /dev/ubi0_0\n"
+"\t2. Only check without modifying filesystem from UBI volume /dev/ubi0_0\n"
+"\t fsck.ubifs -n /dev/ubi0_0\n"
+"\t3. Check and safely repair filesystem from UBI volume /dev/ubi0_0\n"
+"\t fsck.ubifs -a /dev/ubi0_0\n"
+"\t4. Check and forcedly repair filesystem from UBI volume /dev/ubi0_0\n"
+"\t fsck.ubifs -y -b /dev/ubi0_0\n\n";
+
+static inline void usage(void)
+{
+ printf("%s", helptext);
+ exit_code |= FSCK_USAGE;
+ exit(exit_code);
+}
+
+static void get_options(int argc, char *argv[], int *mode)
+{
+ int opt, i, submode = 0;
+ char *endp;
+
+ while (1) {
+ opt = getopt_long(argc, argv, optstring, longopts, &i);
+ if (opt == -1)
+ break;
+ switch (opt) {
+ case 'V':
+ common_print_version();
+ exit(FSCK_OK);
+ case 'g':
+ c->debug_level = strtol(optarg, &endp, 0);
+ if (*endp != '\0' || endp == optarg ||
+ c->debug_level < 0 || c->debug_level > DEBUG_LEVEL) {
+ log_err(c, 0, "bad debugging level '%s'", optarg);
+ usage();
+ }
+ break;
+ case 'a':
+ if (*mode != NORMAL_MODE) {
+conflict_opt:
+ log_err(c, 0, "Only one of the options -a, -n or -y may be specified");
+ usage();
+ }
+ *mode = SAFE_MODE;
+ break;
+ case 'y':
+ if (*mode != NORMAL_MODE)
+ goto conflict_opt;
+ *mode = DANGER_MODE0;
+ break;
+ case 'b':
+ submode = 1;
+ break;
+ case 'n':
+ if (*mode != NORMAL_MODE)
+ goto conflict_opt;
+ *mode = CHECK_MODE;
+ c->ro_mount = 1;
+ break;
+ case 'r':
+ /* Compatible with FSCK(8). */
+ break;
+ default:
+ usage();
+ }
+ }
+
+ if (submode) {
+ if (*mode != DANGER_MODE0) {
+ log_err(c, 0, "Option -y is not specified when -b is used");
+ usage();
+ } else
+ *mode = DANGER_MODE1;
+ }
+
+ if (optind != argc) {
+ c->dev_name = strdup(argv[optind]);
+ if (!c->dev_name) {
+ log_err(c, errno, "can not allocate dev_name");
+ exit_code |= FSCK_ERROR;
+ exit(exit_code);
+ }
+ }
+
+ if (!c->dev_name) {
+ log_err(c, 0, "no ubi_volume specified");
+ usage();
+ }
+}
+
+static void exit_callback(void)
+{
+ if (exit_code & FSCK_NONDESTRUCT)
+ log_out(c, "********** Filesystem was modified **********");
+ if (exit_code & FSCK_UNCORRECTED)
+ log_out(c, "********** WARNING: Filesystem still has errors **********");
+ if (exit_code & ~(FSCK_OK|FSCK_NONDESTRUCT))
+ log_out(c, "FSCK failed, exit code %d", exit_code);
+ else
+ log_out(c, "FSCK success!");
+}
+
+static void fsck_assert_failed(__unused const struct ubifs_info *c)
+{
+ exit_code |= FSCK_ERROR;
+ exit(exit_code);
+}
+
+static void signal_cancel(int sig)
+{
+ ubifs_warn(c, "killed by signo %d", sig);
+ exit_code |= FSCK_CANCELED;
+ exit(exit_code);
+}
+
+static int init_fsck_info(struct ubifs_info *c, int argc, char *argv[])
+{
+ int err = 0, mode = NORMAL_MODE;
+ struct sigaction sa;
+ struct ubifs_fsck_info *fsck = NULL;
+
+ if (atexit(exit_callback)) {
+ log_err(c, errno, "can not set exit callback");
+ return -errno;
+ }
+
+ init_ubifs_info(c, FSCK_PROGRAM_TYPE);
+ get_options(argc, argv, &mode);
+
+ fsck = calloc(1, sizeof(struct ubifs_fsck_info));
+ if (!fsck) {
+ err = -errno;
+ log_err(c, errno, "can not allocate fsck info");
+ goto out_err;
+ }
+
+ c->private = fsck;
+ FSCK(c)->mode = mode;
+ c->assert_failed_cb = fsck_assert_failed;
+
+ memset(&sa, 0, sizeof(struct sigaction));
+ sa.sa_handler = signal_cancel;
+ if (sigaction(SIGINT, &sa, NULL) || sigaction(SIGTERM, &sa, NULL)) {
+ err = -errno;
+ log_err(c, errno, "can not set signal handler");
+ goto out_err;
+ }
+
+ return 0;
+
+out_err:
+ free(fsck);
+ free(c->dev_name);
+ c->dev_name = NULL;
+ return err;
+}
+
+static void destroy_fsck_info(struct ubifs_info *c)
+{
+ free(c->private);
+ c->private = NULL;
+ free(c->dev_name);
+ c->dev_name = NULL;
+}
+
+/*
+ * do_fsck - Check & repair the filesystem.
+ */
+static int do_fsck(void)
+{
+ return 0;
+}
+
+int main(int argc, char *argv[])
+{
+ int err;
+
+ err = init_fsck_info(c, argc, argv);
+ if (err) {
+ exit_code |= FSCK_ERROR;
+ goto out_exit;
+ }
+
+ err = ubifs_open_volume(c, c->dev_name);
+ if (err) {
+ exit_code |= FSCK_ERROR;
+ goto out_destroy_fsck;
+ }
+
+ err = do_fsck();
+
+ ubifs_close_volume(c);
+out_destroy_fsck:
+ destroy_fsck_info(c);
+out_exit:
+ return exit_code;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-18 20:18:19 +0000