Adding upstream version 1.2.2.upstream/1.2.2

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 295 insertions, 0 deletions

diff --git a/fsck/repair.c b/fsck/repair.c
new file mode 100644
index 0000000..f983ee1
--- /dev/null
+++ b/fsck/repair.c
@@ -0,0 +1,295 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ *  Copyright (C) 2020 Hyunchul Lee <hyc.lee@gmail.com>
+ */
+#include <stdio.h>
+#include <string.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <errno.h>
+
+#include "exfat_ondisk.h"
+#include "libexfat.h"
+#include "repair.h"
+#include "exfat_fs.h"
+#include "fsck.h"
+
+struct exfat_repair_problem {
+	er_problem_code_t	prcode;
+	unsigned int		flags;
+	unsigned int		prompt_type;
+	unsigned int		default_number;
+	unsigned int		bypass_number;
+	unsigned int		max_number;
+};
+
+/* Problem flags */
+#define ERF_PREEN_YES		0x00000001
+#define ERF_DEFAULT_YES		0x00000002
+#define ERF_DEFAULT_NO		0x00000004
+
+/* Prompt types */
+#define ERP_FIX			0x00000001
+#define ERP_TRUNCATE		0x00000002
+#define ERP_DELETE		0x00000003
+#define ERP_RENAME		0x00000004
+
+static const char *prompts[] = {
+	"Repair",
+	"Fix",
+	"Truncate",
+	"Delete",
+	"Select",
+};
+
+static struct exfat_repair_problem problems[] = {
+	{ER_BS_CHECKSUM, ERF_PREEN_YES, ERP_FIX, 0, 0, 0},
+	{ER_BS_BOOT_REGION, 0, ERP_FIX, 0, 0, 0},
+	{ER_DE_CHECKSUM, ERF_PREEN_YES, ERP_DELETE, 0, 0, 0},
+	{ER_DE_UNKNOWN, ERF_PREEN_YES, ERP_DELETE, 0, 0, 0},
+	{ER_DE_FILE, ERF_PREEN_YES, ERP_DELETE, 0, 0, 0},
+	{ER_DE_SECONDARY_COUNT, ERF_PREEN_YES, ERP_DELETE, 0, 0, 0},
+	{ER_DE_STREAM, ERF_PREEN_YES, ERP_DELETE, 0, 0, 0},
+	{ER_DE_NAME, ERF_PREEN_YES, ERP_DELETE, 0, 0, 0},
+	{ER_DE_NAME_HASH, ERF_PREEN_YES, ERP_FIX, 0, 0, 0},
+	{ER_DE_NAME_LEN, ERF_PREEN_YES, ERP_FIX, 0, 0, 0},
+	{ER_DE_DOT_NAME, ERF_PREEN_YES, ERP_RENAME, 2, 3, 4},
+	{ER_DE_DUPLICATED_NAME, ERF_PREEN_YES, ERP_RENAME, 2, 3, 4},
+	{ER_FILE_VALID_SIZE, ERF_PREEN_YES, ERP_FIX, 0, 0, 0},
+	{ER_FILE_INVALID_CLUS, ERF_PREEN_YES, ERP_TRUNCATE, 0, 0, 0},
+	{ER_FILE_FIRST_CLUS, ERF_PREEN_YES, ERP_TRUNCATE, 0, 0, 0},
+	{ER_FILE_SMALLER_SIZE, ERF_PREEN_YES, ERP_TRUNCATE, 0, 0, 0},
+	{ER_FILE_LARGER_SIZE, ERF_PREEN_YES, ERP_TRUNCATE, 0, 0, 0},
+	{ER_FILE_DUPLICATED_CLUS, ERF_PREEN_YES, ERP_TRUNCATE, 0, 0, 0},
+	{ER_FILE_ZERO_NOFAT, ERF_PREEN_YES, ERP_FIX, 0, 0, 0},
+};
+
+static struct exfat_repair_problem *find_problem(er_problem_code_t prcode)
+{
+	unsigned int i;
+
+	for (i = 0; i < sizeof(problems)/sizeof(problems[0]); i++) {
+		if (problems[i].prcode == prcode) {
+			return &problems[i];
+		}
+	}
+	return NULL;
+}
+
+static int ask_repair(struct exfat_fsck *fsck, struct exfat_repair_problem *pr)
+{
+	int repair = 0;
+	char answer[8];
+
+	if (fsck->options & FSCK_OPTS_REPAIR_NO ||
+	    pr->flags & ERF_DEFAULT_NO)
+		repair = 0;
+	else if (fsck->options & FSCK_OPTS_REPAIR_YES ||
+		 pr->flags & ERF_DEFAULT_YES)
+		repair = 1;
+	else {
+		if (fsck->options & FSCK_OPTS_REPAIR_ASK) {
+			do {
+				if (pr->prompt_type & ERP_RENAME) {
+					printf("%s (Number: ?) ",
+					       prompts[pr->prompt_type]);
+				} else {
+					printf(". %s (y/N)? ",
+					       prompts[pr->prompt_type]);
+				}
+				fflush(stdout);
+
+				if (!fgets(answer, sizeof(answer), stdin))
+					continue;
+
+				if (pr->prompt_type & ERP_RENAME) {
+					unsigned int number = atoi(answer);
+
+					if (number > 0 && number < pr->max_number)
+						return number;
+				} else {
+					if (strcasecmp(answer, "Y\n") == 0)
+						return 1;
+					else if (strcasecmp(answer, "\n") == 0 ||
+						 strcasecmp(answer, "N\n") == 0)
+						return 0;
+				}
+			} while (1);
+		} else if (fsck->options & FSCK_OPTS_REPAIR_AUTO &&
+			   pr->flags & ERF_PREEN_YES)
+			repair = 1;
+	}
+
+	if (pr->prompt_type & ERP_RENAME) {
+		int print_num = repair ? pr->default_number : pr->bypass_number;
+
+		printf("%s (Number : %d)\n", prompts[pr->prompt_type],
+		       print_num);
+		repair = print_num;
+	} else {
+		printf(". %s (y/N)? %c\n", prompts[pr->prompt_type],
+		       repair ? 'y' : 'n');
+	}
+	return repair;
+}
+
+int exfat_repair_ask(struct exfat_fsck *fsck, er_problem_code_t prcode,
+		     const char *desc, ...)
+{
+	struct exfat_repair_problem *pr = NULL;
+	va_list ap;
+	int repair;
+
+	pr = find_problem(prcode);
+	if (!pr) {
+		exfat_err("unknown problem code. %#x\n", prcode);
+		return 0;
+	}
+
+	va_start(ap, desc);
+	vprintf(desc, ap);
+	va_end(ap);
+
+	repair = ask_repair(fsck, pr);
+	if (repair) {
+		if (pr->prompt_type & ERP_TRUNCATE)
+			fsck->dirty_fat = true;
+		fsck->dirty = true;
+	}
+	return repair;
+}
+
+static int check_bad_char(char w)
+{
+	return (w < 0x0020) || (w == '*') || (w == '?') || (w == '<') ||
+		(w == '>') || (w == '|') || (w == '"') || (w == ':') ||
+		(w == '/') || (w == '\\');
+}
+
+static char *get_rename_from_user(struct exfat_de_iter *iter)
+{
+	char *rename = malloc(ENTRY_NAME_MAX + 2);
+
+	if (!rename)
+		return NULL;
+
+retry:
+	/* +2 means LF(Line Feed) and NULL terminator */
+	memset(rename, 0x1, ENTRY_NAME_MAX + 2);
+	printf("New name: ");
+	if (fgets(rename, ENTRY_NAME_MAX + 2, stdin)) {
+		int i, len, err;
+		struct exfat_lookup_filter filter;
+
+		len = strlen(rename);
+		/* Remove LF in filename */
+		rename[len - 1] = '\0';
+		for (i = 0; i < len - 1; i++) {
+			if (check_bad_char(rename[i])) {
+				printf("filename contain invalid character(%c)\n", rename[i]);
+				goto retry;
+			}
+		}
+
+		exfat_de_iter_flush(iter);
+		err = exfat_lookup_file(iter->exfat, iter->parent, rename, &filter);
+		if (!err) {
+			printf("file(%s) already exists, retry to insert name\n", rename);
+			goto retry;
+		}
+	}
+
+	return rename;
+}
+
+static char *generate_rename(struct exfat_de_iter *iter)
+{
+	char *rename;
+
+	if (iter->invalid_name_num > INVALID_NAME_NUM_MAX)
+		return NULL;
+
+	rename = malloc(ENTRY_NAME_MAX + 1);
+	if (!rename)
+		return NULL;
+
+	while (1) {
+		struct exfat_lookup_filter filter;
+		int err;
+
+		snprintf(rename, ENTRY_NAME_MAX + 1, "FILE%07d.CHK",
+			 iter->invalid_name_num++);
+		err = exfat_lookup_file(iter->exfat, iter->parent, rename,
+					&filter);
+		if (!err)
+			continue;
+		break;
+	}
+
+	return rename;
+}
+
+int exfat_repair_rename_ask(struct exfat_fsck *fsck, struct exfat_de_iter *iter,
+		char *old_name, er_problem_code_t prcode, char *error_msg)
+{
+	int num;
+
+ask_again:
+	num = exfat_repair_ask(fsck, prcode, "ERROR: '%s' %s.\n%s",
+			old_name, error_msg,
+			" [1] Insert the name you want to rename.\n"
+			" [2] Automatically renames filename.\n"
+			" [3] Bypass this check(No repair)\n");
+	if (num) {
+		__le16 utf16_name[ENTRY_NAME_MAX];
+		char *rename = NULL;
+		__u16 hash;
+		struct exfat_dentry *dentry;
+		int ret, i;
+
+		switch (num) {
+		case 1:
+			rename = get_rename_from_user(iter);
+			break;
+		case 2:
+			rename = generate_rename(iter);
+			break;
+		case 3:
+			break;
+		default:
+			exfat_info("select 1 or 2 number instead of %d\n", num);
+			goto ask_again;
+		}
+
+		if (!rename)
+			return -EINVAL;
+
+		exfat_info("%s filename is renamed to %s\n", old_name, rename);
+
+		exfat_de_iter_get_dirty(iter, 2, &dentry);
+
+		memset(utf16_name, 0, sizeof(utf16_name));
+		ret = exfat_utf16_enc(rename, utf16_name, sizeof(utf16_name));
+		free(rename);
+		if (ret < 0)
+			return ret;
+
+		ret >>= 1;
+		memcpy(dentry->name_unicode, utf16_name, ENTRY_NAME_MAX * 2);
+		hash = exfat_calc_name_hash(iter->exfat, utf16_name, ret);
+		exfat_de_iter_get_dirty(iter, 1, &dentry);
+		dentry->stream_name_len = (__u8)ret;
+		dentry->stream_name_hash = cpu_to_le16(hash);
+
+		exfat_de_iter_get_dirty(iter, 0, &dentry);
+		i = dentry->file_num_ext;
+		dentry->file_num_ext = 2;
+
+		for (; i > 2; i--) {
+			exfat_de_iter_get_dirty(iter, i, &dentry);
+			dentry->type &= EXFAT_DELETE;
+		}
+	}
+
+	return 0;
+}