"tune",
"label",
"dump",
+ "exfat2img",
],
}
ACLOCAL_AMFLAGS = -I m4
-SUBDIRS = lib mkfs fsck tune label dump
+SUBDIRS = lib mkfs fsck tune label dump exfat2img
# manpages
dist_man8_MANS = \
manpages/tune.exfat.8 \
manpages/mkfs.exfat.8 \
manpages/exfatlabel.8 \
- manpages/dump.exfat.8
+ manpages/dump.exfat.8 \
+ manpages/exfat2img.8
# other stuff
EXTRA_DIST = \
fsck/Android.bp \
label/Android.bp \
dump/Android.bp \
+ exfat2img/Android.bp \
README.md
top_builddir = @top_builddir@
top_srcdir = @top_srcdir@
ACLOCAL_AMFLAGS = -I m4
-SUBDIRS = lib mkfs fsck tune label dump
+SUBDIRS = lib mkfs fsck tune label dump exfat2img
# manpages
dist_man8_MANS = \
manpages/tune.exfat.8 \
manpages/mkfs.exfat.8 \
manpages/exfatlabel.8 \
- manpages/dump.exfat.8
+ manpages/dump.exfat.8 \
+ manpages/exfat2img.8
# other stuff
fsck/Android.bp \
label/Android.bp \
dump/Android.bp \
+ exfat2img/Android.bp \
README.md
all: config.h
+exfatprogs 1.2.0 - released 2022-10-28
+======================================
+
+CHANGES :
+ * fsck.exfat: Keep traveling files even if there is a corrupted
+directory entry set.
+ * fsck.exfat: Introduce the option "b" to recover a boot sector even
+if an exFAT filesystem is not found.
+ * fsck.exfat: Introduce the option "s" to create files in
+"/LOST+FOUND", which have clusters allocated but was not belonged to
+any files.
+ * fsck.exfat: Rename '.' and '..' entry name to the one user want.
+
+NEW FEATURES :
+ * fsck.exfat: Repair corruptions of an exFAT filesystem. Please refer
+to fsck.exfat manpage to see what kind of corruptions can be repaired.
+ * exfat2img: Dump metadata of an exFAT filesystem. Please refer to
+exfat2img manpage to see how to use it.
+
+BUG FIXES:
+ * fsck.exfat: Fix an infinite loop while traveling files.
+ * tune.exfat: Fix bitmap entry corruption when adding new volume lablel.
+
exfatprogs 1.1.3 - released 2021-11-11
======================================
Usage example:
1. check the consistency.
fsck.exfat /dev/sda1
- 2. repair and fix.(preparing)
+ 2. repair a corrupted device and create files in /LOST+FOUND, which have clusters allocated but not belonged to any files when reparing the device.
+ fsck.exfat -p -s /dev/sda1
+ 3. repair a corrupted device in the same way above, but answering yes to all questions.
+ fsck.exfat -y -s /dev/sda1
- tune.exfat:
Adjust tunable filesystem parameters on an exFAT filesystem
Usage example:
dump.exfat /dev/sda1
+- exfat2img:
+ Dump metadata of an exFAT filesystem
+
+Usage example:
+ exfat2img -o sda1.dump /dev/sda1
+
```
## Benchmarks
## Contributor information
* Please base your pull requests on the `exfat-next` branch.
* Make sure you add 'Signed-Off' information to your commits (e.g. `git commit --signoff`).
+* Please check your code contribution using kernel dev-tool script [checkpatch](https://docs.kernel.org/dev-tools/checkpatch.html).
#! /bin/sh
# Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.69 for exfatprogs 1.1.3.
+# Generated by GNU Autoconf 2.69 for exfatprogs 1.2.0.
#
# Report bugs to <linkinjeon@kernel.org>.
#
# Identity of this package.
PACKAGE_NAME='exfatprogs'
PACKAGE_TARNAME='exfatprogs'
-PACKAGE_VERSION='1.1.3'
-PACKAGE_STRING='exfatprogs 1.1.3'
+PACKAGE_VERSION='1.2.0'
+PACKAGE_STRING='exfatprogs 1.2.0'
PACKAGE_BUGREPORT='linkinjeon@kernel.org'
PACKAGE_URL='https://github.com/exfatprogs/exfatprogs'
# Omit some internal or obsolete options to make the list less imposing.
# This message is too long to be a string in the A/UX 3.1 sh.
cat <<_ACEOF
-\`configure' configures exfatprogs 1.1.3 to adapt to many kinds of systems.
+\`configure' configures exfatprogs 1.2.0 to adapt to many kinds of systems.
Usage: $0 [OPTION]... [VAR=VALUE]...
if test -n "$ac_init_help"; then
case $ac_init_help in
- short | recursive ) echo "Configuration of exfatprogs 1.1.3:";;
+ short | recursive ) echo "Configuration of exfatprogs 1.2.0:";;
esac
cat <<\_ACEOF
test -n "$ac_init_help" && exit $ac_status
if $ac_init_version; then
cat <<\_ACEOF
-exfatprogs configure 1.1.3
+exfatprogs configure 1.2.0
generated by GNU Autoconf 2.69
Copyright (C) 2012 Free Software Foundation, Inc.
This file contains any messages produced by compilers while
running configure, to aid debugging if configure makes a mistake.
-It was created by exfatprogs $as_me 1.1.3, which was
+It was created by exfatprogs $as_me 1.2.0, which was
generated by GNU Autoconf 2.69. Invocation command line was
$ $0 $@
# Define the identity of the package.
PACKAGE='exfatprogs'
- VERSION='1.1.3'
+ VERSION='1.2.0'
cat >>confdefs.h <<_ACEOF
esac
-ac_config_files="$ac_config_files Makefile lib/Makefile mkfs/Makefile fsck/Makefile tune/Makefile label/Makefile dump/Makefile"
+ac_config_files="$ac_config_files Makefile lib/Makefile mkfs/Makefile fsck/Makefile tune/Makefile label/Makefile dump/Makefile exfat2img/Makefile"
cat >confcache <<\_ACEOF
# report actual input values of CONFIG_FILES etc. instead of their
# values after options handling.
ac_log="
-This file was extended by exfatprogs $as_me 1.1.3, which was
+This file was extended by exfatprogs $as_me 1.2.0, which was
generated by GNU Autoconf 2.69. Invocation command line was
CONFIG_FILES = $CONFIG_FILES
cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
ac_cs_config="`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`"
ac_cs_version="\\
-exfatprogs config.status 1.1.3
+exfatprogs config.status 1.2.0
configured by $0, generated by GNU Autoconf 2.69,
with options \\"\$ac_cs_config\\"
"tune/Makefile") CONFIG_FILES="$CONFIG_FILES tune/Makefile" ;;
"label/Makefile") CONFIG_FILES="$CONFIG_FILES label/Makefile" ;;
"dump/Makefile") CONFIG_FILES="$CONFIG_FILES dump/Makefile" ;;
+ "exfat2img/Makefile") CONFIG_FILES="$CONFIG_FILES exfat2img/Makefile" ;;
*) as_fn_error $? "invalid argument: \`$ac_config_target'" "$LINENO" 5;;
esac
tune/Makefile
label/Makefile
dump/Makefile
+ exfat2img/Makefile
])
AC_OUTPUT
goto free_ppbr;
}
+ if (memcmp(ppbr->bpb.oem_name, "EXFAT ", 8) != 0) {
+ exfat_err("Bad fs_name in boot sector, which does not describe a valid exfat filesystem\n");
+ ret = -EINVAL;
+ goto free_ppbr;
+ }
+
pbsx = &ppbr->bsx;
if (pbsx->sect_size_bits < EXFAT_MIN_SECT_SIZE_BITS ||
--- /dev/null
+// Copyright 2021 The Android Open Source Project
+
+cc_binary {
+ name: "exfat2img",
+
+ srcs: [
+ "exfat2img.c",
+ ],
+ defaults: ["exfatprogs-defaults"],
+ static_libs: ["libexfat"],
+}
--- /dev/null
+AM_CFLAGS = -Wall -Wextra -include $(top_builddir)/config.h -I$(top_srcdir)/include -fno-common
+exfat2img_LDADD = $(top_builddir)/lib/libexfat.a
+
+sbin_PROGRAMS = exfat2img
+
+exfat2img_SOURCES = exfat2img.c
--- /dev/null
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+# with or without modifications, as long as this notice is preserved.
+
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+ -e 's/$$/$(EXEEXT)/' \
+ `; \
+ test -n "$$list" || exit 0; \
+ echo " ( cd '$(DESTDIR)$(sbindir)' && rm -f" $$files ")"; \
+ cd "$(DESTDIR)$(sbindir)" && rm -f $$files
+
+clean-sbinPROGRAMS:
+ @list='$(sbin_PROGRAMS)'; test -n "$$list" || exit 0; \
+ echo " rm -f" $$list; \
+ rm -f $$list || exit $$?; \
+ test -n "$(EXEEXT)" || exit 0; \
+ list=`for p in $$list; do echo "$$p"; done | sed 's/$(EXEEXT)$$//'`; \
+ echo " rm -f" $$list; \
+ rm -f $$list
+
+exfat2img$(EXEEXT): $(exfat2img_OBJECTS) $(exfat2img_DEPENDENCIES) $(EXTRA_exfat2img_DEPENDENCIES)
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+ $(AM_V_CCLD)$(LINK) $(exfat2img_OBJECTS) $(exfat2img_LDADD) $(LIBS)
+
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+.c.lo:
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+
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+ for i in $$list; do \
+ if test -f "$$i"; then \
+ echo "$(subdir)/$$i"; \
+ else \
+ echo "$$sdir/$$i"; \
+ fi; \
+ done >> $(top_builddir)/cscope.files
+
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+distdir: $(BUILT_SOURCES)
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+ fi; \
+ cp -fpR $$d/$$file "$(distdir)$$dir" || exit 1; \
+ else \
+ test -f "$(distdir)/$$file" \
+ || cp -p $$d/$$file "$(distdir)/$$file" \
+ || exit 1; \
+ fi; \
+ done
+check-am: all-am
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+ install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+ "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'" install; \
+ fi
+mostlyclean-generic:
+
+clean-generic:
+
+distclean-generic:
+ -test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+ -test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
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+ -rm -f ./$(DEPDIR)/exfat2img.Po
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+ tags tags-am uninstall uninstall-am uninstall-sbinPROGRAMS
+
+.PRECIOUS: Makefile
+
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2021 LG Electronics.
+ *
+ * Author(s): Hyunchul Lee <hyc.lee@gmail.com>
+ */
+
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <getopt.h>
+#include <inttypes.h>
+#include <string.h>
+#include <errno.h>
+
+#include "exfat_ondisk.h"
+#include "libexfat.h"
+#include "exfat_fs.h"
+#include "exfat_dir.h"
+
+#define EXFAT_MAX_UPCASE_CHARS 0x10000
+
+struct exfat2img_hdr {
+ __le32 magic;
+ __le32 major_version;
+ __le32 minor_version;
+ __le32 data_offset;
+ __le32 heap_clus_offset;
+ __le32 cluster_size;
+ __le32 cluster_count;
+ __le32 reserved[20];
+} __packed;
+
+#define EI_MAGIC 0xB67598DB
+#define EI_CC_PAYLOAD_LEN 4
+
+enum {
+ EI_CC_INVALID,
+ EI_CC_COPY_1,
+ EI_CC_COPY_2, /* followed by cluster count(4-byte) */
+ EI_CC_SKIP_1,
+ EI_CC_SKIP_2, /* followed by cluster count(4-byte) */
+};
+
+struct exfat2img {
+ int out_fd;
+ bool is_stdout;
+ off_t stdout_offset;
+ bool save_cc;
+ struct exfat_blk_dev bdev;
+ struct exfat *exfat;
+ struct buffer_desc *dump_bdesc;
+ struct buffer_desc *scan_bdesc;
+ struct exfat_de_iter de_iter;
+};
+
+struct exfat_stat {
+ long dir_count;
+ long file_count;
+ long error_count;
+ uint64_t written_bytes;
+};
+
+static struct exfat2img_hdr ei_hdr;
+static struct exfat2img ei;
+static struct exfat_stat exfat_stat;
+static struct path_resolve_ctx path_resolve_ctx;
+
+static struct option opts[] = {
+ {"output", required_argument, NULL, 'o' },
+ {"version", no_argument, NULL, 'V' },
+ {"help", no_argument, NULL, 'h' },
+ {NULL, 0, NULL, 0 }
+};
+
+static void usage(const char *name)
+{
+ fprintf(stderr, "Usage: %s <device> [image-file]\n", name);
+ fprintf(stderr, "\t-o | --output <image-file> Specify destination file\n");
+ fprintf(stderr, "\t-V | --version Show version\n");
+ fprintf(stderr, "\t-h | --help Show help\n");
+ exit(EXIT_FAILURE);
+}
+
+#define ei_err(parent, inode, fmt, ...) \
+({ \
+ exfat_resolve_path_parent(&path_resolve_ctx, \
+ parent, inode); \
+ exfat_err("ERROR: %s: " fmt, \
+ path_resolve_ctx.local_path, \
+ ##__VA_ARGS__); \
+})
+
+static void free_exfat2img(struct exfat2img *ei)
+{
+ if (ei->exfat)
+ exfat_free_exfat(ei->exfat);
+ if (ei->dump_bdesc)
+ exfat_free_buffer(ei->dump_bdesc, 2);
+ if (ei->scan_bdesc)
+ exfat_free_buffer(ei->scan_bdesc, 2);
+ if (ei->out_fd)
+ close(ei->out_fd);
+ if (ei->bdev.dev_fd)
+ close(ei->bdev.dev_fd);
+}
+
+static int create_exfat2img(struct exfat2img *ei,
+ struct pbr *bs,
+ const char *out_path)
+{
+ int err;
+
+ ei->exfat = exfat_alloc_exfat(&ei->bdev, bs);
+ if (!ei->exfat)
+ return -ENOMEM;
+
+ ei->dump_bdesc = exfat_alloc_buffer(2,
+ ei->exfat->clus_size,
+ ei->exfat->sect_size);
+ if (!ei->dump_bdesc) {
+ err = -ENOMEM;
+ goto err;
+ }
+
+ ei->scan_bdesc = exfat_alloc_buffer(2,
+ ei->exfat->clus_size,
+ ei->exfat->sect_size);
+ if (!ei->scan_bdesc) {
+ err = -ENOMEM;
+ goto err;
+ }
+
+ if (strcmp(out_path, "-")) {
+ ei->out_fd = open(out_path, O_CREAT | O_TRUNC | O_RDWR, 0664);
+ } else {
+ ei->is_stdout = true;
+ ei->out_fd = fileno(stdout);
+ ei->save_cc = true;
+ }
+ if (ei->out_fd < 0) {
+ exfat_err("failed to open %s: %s\n", out_path,
+ strerror(errno));
+ err = -errno;
+ goto err;
+ }
+
+ return 0;
+err:
+ free_exfat2img(ei);
+ return err;
+}
+
+/**
+ * @end: excluded.
+ */
+static ssize_t dump_range(struct exfat2img *ei, off_t start, off_t end)
+{
+ struct exfat *exfat = ei->exfat;
+ size_t len, total_len = 0;
+ ssize_t ret;
+
+ if (ei->is_stdout) {
+ unsigned int sc, sc_offset;
+ unsigned int ec, ec_offset;
+
+ if (exfat_o2c(ei->exfat, start, &sc, &sc_offset) < 0)
+ return -ERANGE;
+ if (exfat_o2c(ei->exfat, end - 1, &ec, &ec_offset) < 0)
+ return -ERANGE;
+ exfat_bitmap_set_range(ei->exfat, exfat->alloc_bitmap,
+ sc, ec - sc + 1);
+ return end - start;
+ }
+
+ while (start < end) {
+ len = (size_t)MIN(end - start, exfat->clus_size);
+
+ ret = exfat_read(exfat->blk_dev->dev_fd,
+ ei->dump_bdesc[0].buffer,
+ len, start);
+ if (ret != (ssize_t)len) {
+ exfat_err("failed to read %llu bytes at %llu\n",
+ (unsigned long long)len,
+ (unsigned long long)start);
+ return -EIO;
+ }
+
+ ret = pwrite(ei->out_fd, ei->dump_bdesc[0].buffer,
+ len, start);
+ if (ret != (ssize_t)len) {
+ exfat_err("failed to write %llu bytes at %llu\n",
+ (unsigned long long)len,
+ (unsigned long long)start);
+ return -EIO;
+ }
+
+ start += len;
+ total_len += len;
+ exfat_stat.written_bytes += len;
+ }
+ return total_len;
+}
+
+static int dump_sectors(struct exfat2img *ei,
+ off_t start_sect,
+ off_t end_sect_excl)
+{
+ struct exfat *exfat = ei->exfat;
+ off_t s, e;
+
+ s = exfat_s2o(exfat, start_sect);
+ e = exfat_s2o(exfat, end_sect_excl);
+ return dump_range(ei, s, e) <= 0 ? -EIO : 0;
+}
+
+static int dump_clusters(struct exfat2img *ei,
+ clus_t start_clus,
+ clus_t end_clus_excl)
+{
+ struct exfat *exfat = ei->exfat;
+ off_t s, e;
+
+ s = exfat_c2o(exfat, start_clus);
+ e = exfat_c2o(exfat, end_clus_excl);
+ return dump_range(ei, s, e) <= 0 ? -EIO : 0;
+}
+
+static int dump_directory(struct exfat2img *ei,
+ struct exfat_inode *inode, size_t size,
+ clus_t *out_clus_count)
+{
+ struct exfat *exfat = ei->exfat;
+ clus_t clus, possible_count;
+ uint64_t max_count;
+ size_t dump_size;
+ off_t start_off, end_off;
+
+ if (size == 0)
+ return -EINVAL;
+
+ if (!(inode->attr & ATTR_SUBDIR))
+ return -EINVAL;
+
+ clus = inode->first_clus;
+ *out_clus_count = 0;
+ max_count = DIV_ROUND_UP(inode->size, exfat->clus_size);
+
+ possible_count = (256 * MB) >> (exfat->bs->bsx.sect_per_clus_bits +
+ exfat->bs->bsx.sect_size_bits);
+ possible_count = MIN(possible_count, exfat->clus_count);
+
+ while (exfat_heap_clus(exfat, clus) && *out_clus_count < possible_count) {
+ dump_size = MIN(size, exfat->clus_size);
+ start_off = exfat_c2o(exfat, clus);
+ end_off = start_off + DIV_ROUND_UP(dump_size, 512) * 512;
+
+ if (dump_range(ei, start_off, end_off) < 0)
+ return -EIO;
+
+ *out_clus_count += 1;
+ size -= dump_size;
+ if (size == 0)
+ break;
+
+ if (inode->is_contiguous) {
+ if (*out_clus_count >= max_count)
+ break;
+ }
+ if (exfat_get_inode_next_clus(exfat, inode, clus, &clus))
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static int dump_root(struct exfat2img *ei)
+{
+ struct exfat *exfat = ei->exfat;
+ struct exfat_inode *root;
+ clus_t clus_count = 0;
+
+ root = exfat_alloc_inode(ATTR_SUBDIR);
+ if (!root)
+ return -ENOMEM;
+
+ root->first_clus = le32_to_cpu(exfat->bs->bsx.root_cluster);
+ dump_directory(ei, root, (size_t)-1, &clus_count);
+ root->size = clus_count * exfat->clus_size;
+
+ ei->exfat->root = root;
+ return 0;
+}
+
+static int read_file_dentry_set(struct exfat_de_iter *iter,
+ struct exfat_inode **new_node, int *skip_dentries)
+{
+ struct exfat_dentry *file_de, *stream_de, *dentry;
+ struct exfat_inode *node = NULL;
+ int i, ret;
+
+ ret = exfat_de_iter_get(iter, 0, &file_de);
+ if (ret || file_de->type != EXFAT_FILE) {
+ exfat_debug("failed to get file dentry\n");
+ return -EINVAL;
+ }
+
+ ret = exfat_de_iter_get(iter, 1, &stream_de);
+ if (ret || stream_de->type != EXFAT_STREAM) {
+ exfat_debug("failed to get stream dentry\n");
+ *skip_dentries = 2;
+ goto skip_dset;
+ }
+
+ *new_node = NULL;
+ node = exfat_alloc_inode(le16_to_cpu(file_de->file_attr));
+ if (!node)
+ return -ENOMEM;
+
+ for (i = 2; i <= file_de->file_num_ext; i++) {
+ ret = exfat_de_iter_get(iter, i, &dentry);
+ if (ret || dentry->type != EXFAT_NAME)
+ break;
+ memcpy(node->name +
+ (i - 2) * ENTRY_NAME_MAX, dentry->name_unicode,
+ sizeof(dentry->name_unicode));
+ }
+
+ node->first_clus = le32_to_cpu(stream_de->stream_start_clu);
+ node->is_contiguous =
+ ((stream_de->stream_flags & EXFAT_SF_CONTIGUOUS) != 0);
+ node->size = le64_to_cpu(stream_de->stream_size);
+
+ *skip_dentries = i;
+ *new_node = node;
+ return 0;
+skip_dset:
+ *new_node = NULL;
+ exfat_free_inode(node);
+ return -EINVAL;
+}
+
+static int read_file(struct exfat_de_iter *de_iter,
+ struct exfat_inode **new_node, int *dentry_count)
+{
+ struct exfat_inode *node;
+ int ret;
+
+ *new_node = NULL;
+
+ ret = read_file_dentry_set(de_iter, &node, dentry_count);
+ if (ret)
+ return ret;
+
+ if (node->attr & ATTR_SUBDIR)
+ exfat_stat.dir_count++;
+ else
+ exfat_stat.file_count++;
+ *new_node = node;
+ return ret;
+}
+
+static int read_bitmap(struct exfat2img *ei, struct exfat_de_iter *iter)
+{
+ struct exfat *exfat = ei->exfat;
+ struct exfat_dentry *dentry;
+ int ret;
+
+ ret = exfat_de_iter_get(iter, 0, &dentry);
+ if (ret || dentry->type != EXFAT_BITMAP) {
+ exfat_debug("failed to get bimtap dentry\n");
+ return -EINVAL;
+ }
+
+ exfat_debug("start cluster %#x, size %#" PRIx64 "\n",
+ le32_to_cpu(dentry->bitmap_start_clu),
+ le64_to_cpu(dentry->bitmap_size));
+
+ if (!exfat_heap_clus(exfat, le32_to_cpu(dentry->bitmap_start_clu))) {
+ exfat_err("invalid start cluster of allocate bitmap. 0x%x\n",
+ le32_to_cpu(dentry->bitmap_start_clu));
+ return -EINVAL;
+ }
+
+ exfat->disk_bitmap_clus = le32_to_cpu(dentry->bitmap_start_clu);
+ exfat->disk_bitmap_size = DIV_ROUND_UP(exfat->clus_count, 8);
+
+ return dump_clusters(ei,
+ exfat->disk_bitmap_clus,
+ exfat->disk_bitmap_clus +
+ DIV_ROUND_UP(exfat->disk_bitmap_size,
+ exfat->clus_size));
+}
+
+static int read_upcase_table(struct exfat2img *ei,
+ struct exfat_de_iter *iter)
+{
+ struct exfat *exfat = ei->exfat;
+ struct exfat_dentry *dentry = NULL;
+ int retval;
+ ssize_t size;
+
+ retval = exfat_de_iter_get(iter, 0, &dentry);
+ if (retval || dentry->type != EXFAT_UPCASE) {
+ exfat_debug("failed to get upcase dentry\n");
+ return -EINVAL;
+ }
+
+ if (!exfat_heap_clus(exfat, le32_to_cpu(dentry->upcase_start_clu))) {
+ exfat_err("invalid start cluster of upcase table. 0x%x\n",
+ le32_to_cpu(dentry->upcase_start_clu));
+ return -EINVAL;
+ }
+
+ size = EXFAT_MAX_UPCASE_CHARS * sizeof(__le16);
+ return dump_clusters(ei, le32_to_cpu(dentry->upcase_start_clu),
+ le32_to_cpu(dentry->upcase_start_clu) +
+ DIV_ROUND_UP(size, exfat->clus_size));
+}
+
+static int read_children(struct exfat2img *ei, struct exfat_inode *dir,
+ off_t *end_file_offset)
+{
+ struct exfat *exfat = ei->exfat;
+ struct exfat_inode *node = NULL;
+ struct exfat_dentry *dentry;
+ struct exfat_de_iter *de_iter;
+ int dentry_count;
+ int ret;
+
+ *end_file_offset = 0;
+ de_iter = &ei->de_iter;
+ ret = exfat_de_iter_init(de_iter, exfat, dir, ei->scan_bdesc);
+ if (ret == EOF)
+ return 0;
+ else if (ret)
+ return ret;
+
+ while (1) {
+ ret = exfat_de_iter_get(de_iter, 0, &dentry);
+ if (ret == EOF) {
+ break;
+ } else if (ret) {
+ ei_err(dir->parent, dir,
+ "failed to get a dentry. %d\n", ret);
+ goto err;
+ }
+ dentry_count = 1;
+
+ switch (dentry->type) {
+ case EXFAT_FILE:
+ ret = read_file(de_iter, &node, &dentry_count);
+ if (ret < 0) {
+ exfat_stat.error_count++;
+ break;
+ }
+
+ if (node) {
+ if ((node->attr & ATTR_SUBDIR) && node->size) {
+ node->parent = dir;
+ list_add_tail(&node->sibling,
+ &dir->children);
+ list_add_tail(&node->list,
+ &exfat->dir_list);
+ } else {
+ exfat_free_inode(node);
+ }
+ }
+ break;
+ case EXFAT_LAST:
+ goto out;
+ case EXFAT_BITMAP:
+ if (dir == exfat->root) {
+ ret = read_bitmap(ei, de_iter);
+ if (ret)
+ exfat_debug("failed to read bitmap\n");
+ }
+ break;
+ case EXFAT_UPCASE:
+ if (dir == exfat->root) {
+ ret = read_upcase_table(ei, de_iter);
+ if (ret)
+ exfat_debug("failed to upcase table\n");
+ }
+ break;
+ case EXFAT_VOLUME:
+ default:
+ break;
+ }
+
+ ret = exfat_de_iter_advance(de_iter, dentry_count);
+ }
+out:
+ *end_file_offset = exfat_de_iter_file_offset(de_iter);
+ exfat_de_iter_flush(de_iter);
+ return 0;
+err:
+ exfat_free_children(dir, false);
+ INIT_LIST_HEAD(&dir->children);
+ exfat_de_iter_flush(de_iter);
+ return ret;
+}
+
+static int dump_filesystem(struct exfat2img *ei)
+{
+ struct exfat *exfat = ei->exfat;
+ struct exfat_inode *dir;
+ int ret = 0, dir_errors;
+ clus_t clus_count;
+ off_t end_file_offset;
+
+ if (!exfat->root) {
+ exfat_err("root is NULL\n");
+ return -ENOENT;
+ }
+
+ list_add(&exfat->root->list, &exfat->dir_list);
+
+ while (!list_empty(&exfat->dir_list)) {
+ dir = list_entry(exfat->dir_list.next,
+ struct exfat_inode, list);
+ clus_count = 0;
+
+ if (!(dir->attr & ATTR_SUBDIR)) {
+ ei_err(dir->parent, dir,
+ "failed to travel directories. the node is not directory\n");
+ ret = -EINVAL;
+ goto out;
+ }
+
+ dir_errors = read_children(ei, dir, &end_file_offset);
+ if (!dir_errors) {
+ dump_directory(ei, dir, (size_t)end_file_offset,
+ &clus_count);
+ } else if (dir_errors) {
+ dump_directory(ei, dir, (size_t)-1,
+ &clus_count);
+ exfat_resolve_path(&path_resolve_ctx, dir);
+ exfat_debug("failed to check dentries: %s\n",
+ path_resolve_ctx.local_path);
+ ret = dir_errors;
+ }
+
+ list_del(&dir->list);
+ exfat_free_ancestors(dir);
+ }
+out:
+ exfat_free_dir_list(exfat);
+ return ret;
+}
+
+static int dump_bytes_to_stdout(struct exfat2img *ei,
+ off_t start, off_t end_excl, bool fill_zero)
+{
+ struct exfat *exfat = ei->exfat;
+ size_t len;
+ ssize_t ret;
+
+ if (start != ei->stdout_offset) {
+ exfat_err("try to skip for stdout at %llu, expected: %llu\n",
+ (unsigned long long)start,
+ (unsigned long long)ei->stdout_offset);
+ return -EINVAL;
+ }
+
+ while (start < end_excl) {
+ len = (size_t)MIN(end_excl - start, exfat->clus_size);
+ if (!fill_zero) {
+ ret = exfat_read(exfat->blk_dev->dev_fd,
+ ei->dump_bdesc[0].buffer,
+ len, start);
+ if (ret != (ssize_t)len) {
+ exfat_err("failed to read %llu bytes at %llu\n",
+ (unsigned long long)len,
+ (unsigned long long)start);
+ return -EIO;
+ }
+
+ ret = write(ei->out_fd, ei->dump_bdesc[0].buffer, len);
+ if (ret != (ssize_t)len) {
+ exfat_err("failed to write %llu bytes at %llu\n",
+ (unsigned long long)len,
+ (unsigned long long)start);
+ return -EIO;
+ }
+ } else {
+ ret = write(ei->out_fd, exfat->zero_cluster, len);
+ if (ret != (ssize_t)len) {
+ exfat_err("failed to write %llu bytes at %llu\n",
+ (unsigned long long)len,
+ (unsigned long long)start);
+ return -EIO;
+ }
+ }
+
+ start += len;
+ ei->stdout_offset += len;
+ exfat_stat.written_bytes += len;
+ }
+ return 0;
+}
+
+static int dump_clusters_to_stdout(struct exfat2img *ei,
+ unsigned int start_clu, unsigned int end_clu,
+ bool fill_zero)
+{
+ unsigned int clu, clu_count;
+ unsigned char cc;
+ unsigned int cc_clu_count, cc_len;
+ off_t start_off, end_off_excl;
+ char buf[1 + EI_CC_PAYLOAD_LEN];
+
+ clu = start_clu;
+ clu_count = end_clu - start_clu + 1;
+
+ if (ei->save_cc) {
+ /* if the count of clusters is less than 5, use SKIP_1 or COPY_2 */
+ cc_clu_count = clu_count < 5 ? 1 : clu_count;
+ cc_len = cc_clu_count == 1 ? 1 : 1 + EI_CC_PAYLOAD_LEN;
+ if (fill_zero)
+ cc = cc_clu_count == 1 ? EI_CC_SKIP_1 : EI_CC_SKIP_2;
+ else
+ cc = cc_clu_count == 1 ? EI_CC_COPY_1 : EI_CC_COPY_2;
+ } else {
+ cc = EI_CC_INVALID;
+ cc_clu_count = clu_count;
+ }
+
+ while (clu <= end_clu) {
+ if (cc != EI_CC_INVALID) {
+ buf[0] = cc;
+ *((__le32 *)&buf[1]) =
+ cpu_to_le32(cc_clu_count);
+ if (write(ei->out_fd, buf, cc_len) != (ssize_t)cc_len) {
+ exfat_err("failed to write cc %d : %u\n for %u ~ %u clusters\n",
+ cc, cc_clu_count,
+ start_clu, start_clu + cc_clu_count - 1);
+ }
+ }
+
+ if (cc == EI_CC_COPY_1 || cc == EI_CC_COPY_2) {
+ start_off = exfat_c2o(ei->exfat, clu);
+ end_off_excl = exfat_c2o(ei->exfat, clu + cc_clu_count);
+
+ if (dump_bytes_to_stdout(ei, start_off, end_off_excl,
+ false) < 0)
+ return -EIO;
+ } else {
+ ei->stdout_offset += (off_t)cc_clu_count * ei->exfat->clus_size;
+ }
+ clu += cc_clu_count;
+ }
+
+ return 0;
+}
+
+static int dump_to_stdout(struct exfat2img *ei)
+{
+ struct exfat *exfat = ei->exfat;
+ off_t start_off, end_off;
+ unsigned int clu, last_clu, next_clu;
+ unsigned int start_clu, end_clu;
+
+ start_off = 0;
+ end_off = exfat_s2o(exfat, le32_to_cpu(exfat->bs->bsx.clu_offset));
+ if (dump_bytes_to_stdout(ei, start_off, end_off, false) < 0) {
+ exfat_err("failed to dump boot sectors and FAT tables\n");
+ return -EIO;
+ }
+
+ clu = EXFAT_FIRST_CLUSTER;
+ last_clu = clu + exfat->clus_count;
+ while (clu < last_clu) {
+ /* read and write clusters for allocated ones */
+ start_clu = 0;
+ while (clu < last_clu &&
+ exfat_bitmap_get(exfat->alloc_bitmap, clu)) {
+ if (!start_clu)
+ start_clu = clu;
+ end_clu = clu;
+ clu++;
+ }
+
+ if (start_clu) {
+ if (dump_clusters_to_stdout(ei, start_clu, end_clu, false) < 0) {
+ start_off = exfat_c2o(exfat, start_clu);
+ end_off = exfat_c2o(exfat, end_clu);
+ exfat_err("failed to dump range from %llx to %llx\n",
+ (unsigned long long)start_off,
+ (unsigned long long)end_off);
+ return -EIO;
+ }
+ }
+
+ /* exit if all of the remaining clusters are free */
+ if (clu >= last_clu)
+ break;
+ if (exfat_bitmap_find_one(exfat, exfat->alloc_bitmap,
+ clu, &next_clu))
+ next_clu = EXFAT_FIRST_CLUSTER + exfat->clus_count;
+
+ /* write zeroes for free clusters */
+ start_clu = clu;
+ end_clu = next_clu - 1;
+ if (dump_clusters_to_stdout(ei, start_clu, end_clu, true) < 0) {
+ start_off = exfat_c2o(exfat, start_clu);
+ end_off = exfat_c2o(exfat, end_clu);
+ exfat_err("failed to dump zero range from %llx to %llx\n",
+ (unsigned long long)start_off,
+ (unsigned long long)end_off);
+ return -EIO;
+ }
+
+ clu = next_clu;
+ }
+
+ return 0;
+}
+
+static int dump_header(struct exfat2img *ei)
+{
+ struct exfat *exfat = ei->exfat;
+
+ ei_hdr.magic = cpu_to_le32(EI_MAGIC);
+ ei_hdr.major_version = cpu_to_le32(1);
+ ei_hdr.minor_version = cpu_to_le32(0);
+ ei_hdr.data_offset = cpu_to_le32(sizeof(struct exfat2img_hdr));
+ ei_hdr.heap_clus_offset =
+ cpu_to_le32(le32_to_cpu(exfat->bs->bsx.clu_offset) *
+ exfat->sect_size);
+ ei_hdr.cluster_size = cpu_to_le32(exfat->clus_size);
+ ei_hdr.cluster_count = cpu_to_le32(exfat->clus_count);
+
+ if (write(ei->out_fd, &ei_hdr, sizeof(ei_hdr)) != (ssize_t)sizeof(ei_hdr)) {
+ exfat_err("failed to write exfat2img header\n");
+ return -EIO;
+ }
+ return 0;
+}
+
+static ssize_t read_stream(int fd, void *buf, size_t len)
+{
+ size_t read_len = 0;
+ ssize_t ret;
+
+ while (read_len < len) {
+ ret = read(fd, buf, len - read_len);
+ if (ret < 0) {
+ if (errno != -EAGAIN && errno != -EINTR)
+ return -1;
+ ret = 0;
+ } else if (ret == 0) {
+ return 0;
+ }
+ buf += (size_t)ret;
+ read_len += (size_t)ret;
+ }
+ return read_len;
+}
+
+static int restore_from_stdin(struct exfat2img *ei)
+{
+ int in_fd, ret;
+ unsigned char cc;
+ unsigned int clu, end_clu;
+ unsigned int cc_clu_count;
+ unsigned int clus_size;
+ __le32 t_cc_clu_count;
+ off_t out_start_off, out_end_off_excl;
+ off_t in_start_off;
+ size_t len;
+
+ in_fd = fileno(stdin);
+ if (in_fd < 0) {
+ exfat_err("failed to get fd from stdin\n");
+ return in_fd;
+ }
+
+ if (read_stream(in_fd, &ei_hdr, sizeof(ei_hdr)) != (ssize_t)sizeof(ei_hdr)) {
+ exfat_err("failed to read a header\n");
+ return -EIO;
+ }
+
+ if (le32_to_cpu(ei_hdr.magic) != EI_MAGIC) {
+ exfat_err("header has invalid magic %#x, expected %#x\n",
+ le32_to_cpu(ei_hdr.magic), EI_MAGIC);
+ return -EINVAL;
+ }
+
+ clus_size = le32_to_cpu(ei_hdr.cluster_size);
+
+ ei->out_fd = ei->bdev.dev_fd;
+ ei->dump_bdesc = exfat_alloc_buffer(2, clus_size, 512);
+ if (!ei->dump_bdesc)
+ return -ENOMEM;
+
+ /* restore boot regions, and FAT tables */
+ in_start_off = le32_to_cpu(ei_hdr.data_offset);
+ out_start_off = 0;
+ out_end_off_excl = le32_to_cpu(ei_hdr.heap_clus_offset);
+ while (out_start_off < out_end_off_excl) {
+ len = MIN(out_end_off_excl - out_start_off, clus_size);
+ if (read_stream(in_fd, ei->dump_bdesc[0].buffer, len) != (ssize_t)len) {
+ exfat_err("failed to read first meta region. %llu ~ %llu\n",
+ (unsigned long long)in_start_off,
+ (unsigned long long)in_start_off + len);
+ ret = -EIO;
+ goto out;
+ }
+
+ if (pwrite(ei->out_fd, ei->dump_bdesc[0].buffer, len, out_start_off)
+ != (ssize_t)len) {
+ exfat_err("failed to write first meta region. %llu ~ %llu\n",
+ (unsigned long long)out_start_off,
+ (unsigned long long)out_start_off + len);
+ ret = -EIO;
+ goto out;
+ }
+
+ out_start_off += len;
+ in_start_off += len;
+ }
+
+ /* restore heap clusters */
+ clu = 0;
+ while (clu < le32_to_cpu(ei_hdr.cluster_count)) {
+ if (read_stream(in_fd, &cc, sizeof(cc)) != (ssize_t)sizeof(cc)) {
+ exfat_err("failed to read cc at %llu\n",
+ (unsigned long long)in_start_off);
+ ret = -EIO;
+ goto out;
+ }
+ in_start_off += 1;
+
+ if (cc == EI_CC_COPY_2 || cc == EI_CC_SKIP_2) {
+ if (read_stream(in_fd, &t_cc_clu_count, EI_CC_PAYLOAD_LEN) !=
+ (ssize_t)EI_CC_PAYLOAD_LEN) {
+ exfat_err("failed to read cc cluster count at %llu\n",
+ (unsigned long long)in_start_off);
+ ret = -EIO;
+ goto out;
+ }
+ cc_clu_count = le32_to_cpu(t_cc_clu_count);
+ in_start_off += EI_CC_PAYLOAD_LEN;
+ } else if (cc == EI_CC_COPY_1 || cc == EI_CC_SKIP_1) {
+ cc_clu_count = 1;
+ } else {
+ exfat_err("unexpected cc %d at %llu\n",
+ cc, (unsigned long long)in_start_off);
+ ret = -EINVAL;
+ goto out;
+ }
+
+ if (cc == EI_CC_COPY_1 || cc == EI_CC_COPY_2) {
+ end_clu = clu + cc_clu_count;
+ while (clu < end_clu) {
+ if (read_stream(in_fd, ei->dump_bdesc[0].buffer,
+ clus_size) != (ssize_t)clus_size) {
+ exfat_err("failed to read range %llu ~ %llu\n",
+ (unsigned long long)in_start_off,
+ (unsigned long long)in_start_off + clus_size);
+ ret = -EIO;
+ goto out;
+ }
+ if (pwrite(ei->out_fd, ei->dump_bdesc[0].buffer,
+ clus_size, out_start_off) != (ssize_t)clus_size) {
+ exfat_err("failed to write range %llu ~ %llu\n",
+ (unsigned long long)out_start_off,
+ (unsigned long long)out_start_off + clus_size);
+ ret = -EIO;
+ goto out;
+ }
+
+ out_start_off += clus_size;
+ in_start_off += clus_size;
+ clu++;
+ }
+ } else {
+ out_start_off += (off_t)cc_clu_count * clus_size;
+ in_start_off += (off_t)cc_clu_count * clus_size;
+ if (lseek(ei->out_fd, out_start_off, SEEK_SET) == (off_t)-1) {
+ exfat_err("failed to seek to %llu\n",
+ (unsigned long long)out_start_off);
+ ret = -EIO;
+ goto out;
+ }
+ clu += cc_clu_count;
+ }
+ }
+out:
+ fsync(ei->out_fd);
+ exfat_free_buffer(ei->dump_bdesc, 2);
+ return ret;
+}
+
+int main(int argc, char * const argv[])
+{
+ int err = 0, c;
+ const char *in_path, *out_path = NULL, *blkdev_path;
+ struct pbr *bs;
+ struct exfat_user_input ui;
+ off_t last_sect;
+ bool restore;
+
+ print_level = EXFAT_ERROR;
+
+ opterr = 0;
+ while ((c = getopt_long(argc, argv, "o:Vh", opts, NULL)) != EOF) {
+ switch (c) {
+ case 'o':
+ out_path = optarg;
+ break;
+ case 'V':
+ show_version();
+ return 0;
+ case 'h':
+ /* Fall through */
+ default:
+ usage(argv[0]);
+ break;
+ }
+ }
+
+ show_version();
+ if (!(optind == argc - 1 && out_path) &&
+ !(optind == argc - 2 && !out_path))
+ usage(argv[0]);
+
+ in_path = argv[optind++];
+ if (!out_path)
+ out_path = argv[optind++];
+
+ if (!strcmp(in_path, "-")) {
+ restore = true;
+ blkdev_path = out_path;
+ } else {
+ restore = false;
+ blkdev_path = in_path;
+ }
+
+ memset(&ui, 0, sizeof(ui));
+ snprintf(ui.dev_name, sizeof(ui.dev_name), "%s", blkdev_path);
+ if (restore)
+ ui.writeable = true;
+ else
+ ui.writeable = false;
+
+ if (exfat_get_blk_dev_info(&ui, &ei.bdev)) {
+ exfat_err("failed to open %s\n", ui.dev_name);
+ return EXIT_FAILURE;
+ }
+
+ if (restore)
+ return restore_from_stdin(&ei);
+
+ err = read_boot_sect(&ei.bdev, &bs);
+ if (err) {
+ close(ei.bdev.dev_fd);
+ return EXIT_FAILURE;
+ }
+
+ err = create_exfat2img(&ei, bs, out_path);
+ if (err)
+ return EXIT_FAILURE;
+
+ if (!ei.is_stdout) {
+ err = dump_sectors(&ei, 0, le32_to_cpu(ei.exfat->bs->bsx.clu_offset));
+ if (err) {
+ exfat_err("failed to dump boot sectors, fat\n");
+ goto out;
+ }
+
+ last_sect = (off_t)le32_to_cpu(ei.exfat->bs->bsx.clu_offset) +
+ (le32_to_cpu(ei.exfat->bs->bsx.clu_count) <<
+ ei.exfat->bs->bsx.sect_per_clus_bits) - 1;
+ err = dump_sectors(&ei, last_sect, last_sect + 1);
+ if (err) {
+ exfat_err("failed to dump last sector\n");
+ goto out;
+ }
+ }
+
+ err = dump_root(&ei);
+ if (err) {
+ exfat_err("failed to dump root\n");
+ goto out;
+ }
+
+ dump_filesystem(&ei);
+
+ if (ei.is_stdout) {
+ err = dump_header(&ei);
+ if (err)
+ goto out;
+ err = dump_to_stdout(&ei);
+ if (err)
+ goto out;
+ } else {
+ err = fsync(ei.out_fd);
+ if (err) {
+ exfat_err("failed to fsync %s. %d\n", out_path, errno);
+ goto out;
+ }
+ close(ei.out_fd);
+ }
+
+ printf("%ld files found, %ld directories dumped, %llu kbytes written\n",
+ exfat_stat.file_count,
+ exfat_stat.dir_count,
+ (unsigned long long)DIV_ROUND_UP(exfat_stat.written_bytes, 1024));
+
+out:
+ free_exfat2img(&ei);
+ return err == 0 ? EXIT_SUCCESS : EXIT_FAILURE;
+}
name: "fsck.exfat",
srcs: [
- "de_iter.c",
"fsck.c",
"repair.c",
],
-AM_CFLAGS = -Wall -include $(top_builddir)/config.h -I$(top_srcdir)/include -fno-common
+AM_CFLAGS = -Wall -Wextra -include $(top_builddir)/config.h -I$(top_srcdir)/include -fno-common
fsck_exfat_LDADD = $(top_builddir)/lib/libexfat.a
sbin_PROGRAMS = fsck.exfat
-fsck_exfat_SOURCES = fsck.c repair.c fsck.h de_iter.c repair.h
+fsck_exfat_SOURCES = fsck.c repair.c fsck.h repair.h
CONFIG_CLEAN_VPATH_FILES =
am__installdirs = "$(DESTDIR)$(sbindir)"
PROGRAMS = $(sbin_PROGRAMS)
-am_fsck_exfat_OBJECTS = fsck.$(OBJEXT) repair.$(OBJEXT) \
- de_iter.$(OBJEXT)
+am_fsck_exfat_OBJECTS = fsck.$(OBJEXT) repair.$(OBJEXT)
fsck_exfat_OBJECTS = $(am_fsck_exfat_OBJECTS)
fsck_exfat_DEPENDENCIES = $(top_builddir)/lib/libexfat.a
AM_V_lt = $(am__v_lt_@AM_V@)
DEFAULT_INCLUDES = -I.@am__isrc@ -I$(top_builddir)
depcomp = $(SHELL) $(top_srcdir)/build-aux/depcomp
am__maybe_remake_depfiles = depfiles
-am__depfiles_remade = ./$(DEPDIR)/de_iter.Po ./$(DEPDIR)/fsck.Po \
- ./$(DEPDIR)/repair.Po
+am__depfiles_remade = ./$(DEPDIR)/fsck.Po ./$(DEPDIR)/repair.Po
am__mv = mv -f
COMPILE = $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) \
$(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS)
top_build_prefix = @top_build_prefix@
top_builddir = @top_builddir@
top_srcdir = @top_srcdir@
-AM_CFLAGS = -Wall -include $(top_builddir)/config.h -I$(top_srcdir)/include -fno-common
+AM_CFLAGS = -Wall -Wextra -include $(top_builddir)/config.h -I$(top_srcdir)/include -fno-common
fsck_exfat_LDADD = $(top_builddir)/lib/libexfat.a
-fsck_exfat_SOURCES = fsck.c repair.c fsck.h de_iter.c repair.h
+fsck_exfat_SOURCES = fsck.c repair.c fsck.h repair.h
all: all-am
.SUFFIXES:
distclean-compile:
-rm -f *.tab.c
-@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/de_iter.Po@am__quote@ # am--include-marker
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/fsck.Po@am__quote@ # am--include-marker
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/repair.Po@am__quote@ # am--include-marker
mostlyclean-am
distclean: distclean-am
- -rm -f ./$(DEPDIR)/de_iter.Po
- -rm -f ./$(DEPDIR)/fsck.Po
+ -rm -f ./$(DEPDIR)/fsck.Po
-rm -f ./$(DEPDIR)/repair.Po
-rm -f Makefile
distclean-am: clean-am distclean-compile distclean-generic \
installcheck-am:
maintainer-clean: maintainer-clean-am
- -rm -f ./$(DEPDIR)/de_iter.Po
- -rm -f ./$(DEPDIR)/fsck.Po
+ -rm -f ./$(DEPDIR)/fsck.Po
-rm -f ./$(DEPDIR)/repair.Po
-rm -f Makefile
maintainer-clean-am: distclean-am maintainer-clean-generic
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Copyright (C) 2020 Hyunchul Lee <hyc.lee@gmail.com>
- */
-#include <stdlib.h>
-#include <stdio.h>
-#include <errno.h>
-#include <fcntl.h>
-
-#include "exfat_ondisk.h"
-#include "libexfat.h"
-#include "fsck.h"
-
-static ssize_t write_block(struct exfat_de_iter *iter, unsigned int block)
-{
- off_t device_offset;
- struct exfat *exfat = iter->exfat;
- struct buffer_desc *desc;
- unsigned int i;
-
- desc = &iter->buffer_desc[block & 0x01];
- device_offset = exfat_c2o(exfat, desc->p_clus) + desc->offset;
-
- for (i = 0; i < iter->read_size / iter->write_size; i++) {
- if (desc->dirty[i]) {
- if (exfat_write(exfat->blk_dev->dev_fd,
- desc->buffer + i * iter->write_size,
- iter->write_size,
- device_offset + i * iter->write_size)
- != (ssize_t)iter->write_size)
- return -EIO;
- desc->dirty[i] = 0;
- }
- }
- return 0;
-}
-
-static int read_ahead_first_blocks(struct exfat_de_iter *iter)
-{
-#ifdef POSIX_FADV_WILLNEED
- struct exfat *exfat = iter->exfat;
- clus_t clus_count;
- unsigned int size;
-
- clus_count = iter->parent->size / exfat->clus_size;
-
- if (clus_count > 1) {
- iter->ra_begin_offset = 0;
- iter->ra_next_clus = 1;
- size = exfat->clus_size;
- } else {
- iter->ra_begin_offset = 0;
- iter->ra_next_clus = 0;
- size = iter->ra_partial_size;
- }
- return posix_fadvise(exfat->blk_dev->dev_fd,
- exfat_c2o(exfat, iter->parent->first_clus), size,
- POSIX_FADV_WILLNEED);
-#else
- return -ENOTSUP;
-#endif
-}
-
-/**
- * read the next fragment in advance, and assume the fragment
- * which covers @clus is already read.
- */
-static int read_ahead_next_blocks(struct exfat_de_iter *iter,
- clus_t clus, unsigned int offset, clus_t p_clus)
-{
-#ifdef POSIX_FADV_WILLNEED
- struct exfat *exfat = iter->exfat;
- off_t device_offset;
- clus_t clus_count, ra_clus, ra_p_clus;
- unsigned int size;
- int ret = 0;
-
- clus_count = iter->parent->size / exfat->clus_size;
- if (clus + 1 < clus_count) {
- ra_clus = clus + 1;
- if (ra_clus == iter->ra_next_clus &&
- offset >= iter->ra_begin_offset) {
- ret = get_next_clus(exfat, iter->parent,
- p_clus, &ra_p_clus);
- if (ra_p_clus == EXFAT_EOF_CLUSTER)
- return -EIO;
-
- device_offset = exfat_c2o(exfat, ra_p_clus);
- size = ra_clus + 1 < clus_count ?
- exfat->clus_size : iter->ra_partial_size;
- ret = posix_fadvise(exfat->blk_dev->dev_fd,
- device_offset, size,
- POSIX_FADV_WILLNEED);
- iter->ra_next_clus = ra_clus + 1;
- iter->ra_begin_offset = 0;
- }
- } else {
- if (offset >= iter->ra_begin_offset &&
- offset + iter->ra_partial_size <=
- exfat->clus_size) {
- device_offset = exfat_c2o(exfat, p_clus) +
- offset + iter->ra_partial_size;
- ret = posix_fadvise(exfat->blk_dev->dev_fd,
- device_offset, iter->ra_partial_size,
- POSIX_FADV_WILLNEED);
- iter->ra_begin_offset =
- offset + iter->ra_partial_size;
- }
- }
-
- return ret;
-#else
- return -ENOTSUP;
-#endif
-}
-
-static int read_ahead_next_dir_blocks(struct exfat_de_iter *iter)
-{
-#ifdef POSIX_FADV_WILLNEED
- struct exfat *exfat = iter->exfat;
- struct list_head *current;
- struct exfat_inode *next_inode;
- off_t offset;
-
- if (list_empty(&exfat->dir_list))
- return -EINVAL;
-
- current = exfat->dir_list.next;
- if (iter->parent == list_entry(current, struct exfat_inode, list) &&
- current->next != &exfat->dir_list) {
- next_inode = list_entry(current->next, struct exfat_inode,
- list);
- offset = exfat_c2o(exfat, next_inode->first_clus);
- return posix_fadvise(exfat->blk_dev->dev_fd, offset,
- iter->ra_partial_size,
- POSIX_FADV_WILLNEED);
- }
-
- return 0;
-#else
- return -ENOTSUP;
-#endif
-}
-
-static ssize_t read_block(struct exfat_de_iter *iter, unsigned int block)
-{
- struct exfat *exfat = iter->exfat;
- struct buffer_desc *desc, *prev_desc;
- off_t device_offset;
- ssize_t ret;
-
- desc = &iter->buffer_desc[block & 0x01];
- if (block == 0) {
- desc->p_clus = iter->parent->first_clus;
- desc->offset = 0;
- }
-
- /* if the buffer already contains dirty dentries, write it */
- if (write_block(iter, block))
- return -EIO;
-
- if (block > 0) {
- if (block > iter->parent->size / iter->read_size)
- return EOF;
-
- prev_desc = &iter->buffer_desc[(block-1) & 0x01];
- if (prev_desc->offset + 2 * iter->read_size <=
- exfat->clus_size) {
- desc->p_clus = prev_desc->p_clus;
- desc->offset = prev_desc->offset + iter->read_size;
- } else {
- ret = get_next_clus(exfat, iter->parent,
- prev_desc->p_clus, &desc->p_clus);
- desc->offset = 0;
- if (!ret && desc->p_clus == EXFAT_EOF_CLUSTER)
- return EOF;
- else if (ret)
- return ret;
- }
- }
-
- device_offset = exfat_c2o(exfat, desc->p_clus) + desc->offset;
- ret = exfat_read(exfat->blk_dev->dev_fd, desc->buffer,
- iter->read_size, device_offset);
- if (ret <= 0)
- return ret;
-
- /*
- * if a buffer is filled with dentries, read blocks ahead of time,
- * otherwise read blocks of the next directory in advance.
- */
- if (desc->buffer[iter->read_size - 32] != EXFAT_LAST)
- read_ahead_next_blocks(iter,
- (block * iter->read_size) / exfat->clus_size,
- (block * iter->read_size) % exfat->clus_size,
- desc->p_clus);
- else
- read_ahead_next_dir_blocks(iter);
- return ret;
-}
-
-int exfat_de_iter_init(struct exfat_de_iter *iter, struct exfat *exfat,
- struct exfat_inode *dir)
-{
- iter->exfat = exfat;
- iter->parent = dir;
- iter->write_size = exfat->sect_size;
- iter->read_size = exfat->clus_size <= 4*KB ? exfat->clus_size : 4*KB;
- if (exfat->clus_size <= 32 * KB)
- iter->ra_partial_size = MAX(4 * KB, exfat->clus_size / 2);
- else
- iter->ra_partial_size = exfat->clus_size / 4;
- iter->ra_partial_size = MIN(iter->ra_partial_size, 8 * KB);
-
- if (!iter->buffer_desc)
- iter->buffer_desc = exfat->buffer_desc;
-
- if (iter->parent->size == 0)
- return EOF;
-
- read_ahead_first_blocks(iter);
- if (read_block(iter, 0) != (ssize_t)iter->read_size) {
- exfat_err("failed to read directory entries.\n");
- return -EIO;
- }
-
- iter->de_file_offset = 0;
- iter->next_read_offset = iter->read_size;
- iter->max_skip_dentries = 0;
- return 0;
-}
-
-int exfat_de_iter_get(struct exfat_de_iter *iter,
- int ith, struct exfat_dentry **dentry)
-{
- off_t next_de_file_offset;
- ssize_t ret;
- unsigned int block;
-
- next_de_file_offset = iter->de_file_offset +
- ith * sizeof(struct exfat_dentry);
- block = (unsigned int)(next_de_file_offset / iter->read_size);
-
- if (next_de_file_offset + sizeof(struct exfat_dentry) >
- iter->parent->size)
- return EOF;
- /* the dentry must be in current, or next block which will be read */
- if (block > iter->de_file_offset / iter->read_size + 1)
- return -ERANGE;
-
- /* read next cluster if needed */
- if (next_de_file_offset >= iter->next_read_offset) {
- ret = read_block(iter, block);
- if (ret != (ssize_t)iter->read_size)
- return ret;
- iter->next_read_offset += iter->read_size;
- }
-
- if (ith + 1 > iter->max_skip_dentries)
- iter->max_skip_dentries = ith + 1;
-
- *dentry = (struct exfat_dentry *)
- (iter->buffer_desc[block & 0x01].buffer +
- next_de_file_offset % iter->read_size);
- return 0;
-}
-
-int exfat_de_iter_get_dirty(struct exfat_de_iter *iter,
- int ith, struct exfat_dentry **dentry)
-{
- off_t next_file_offset;
- unsigned int block;
- int ret, sect_idx;
-
- ret = exfat_de_iter_get(iter, ith, dentry);
- if (!ret) {
- next_file_offset = iter->de_file_offset +
- ith * sizeof(struct exfat_dentry);
- block = (unsigned int)(next_file_offset / iter->read_size);
- sect_idx = (int)((next_file_offset % iter->read_size) /
- iter->write_size);
- iter->buffer_desc[block & 0x01].dirty[sect_idx] = 1;
- }
-
- return ret;
-}
-
-int exfat_de_iter_flush(struct exfat_de_iter *iter)
-{
- if (write_block(iter, 0) || write_block(iter, 1))
- return -EIO;
- return 0;
-}
-
-/*
- * @skip_dentries must be the largest @ith + 1 of exfat_de_iter_get
- * since the last call of exfat_de_iter_advance
- */
-int exfat_de_iter_advance(struct exfat_de_iter *iter, int skip_dentries)
-{
- if (skip_dentries != iter->max_skip_dentries)
- return -EINVAL;
-
- iter->max_skip_dentries = 0;
- iter->de_file_offset = iter->de_file_offset +
- skip_dentries * sizeof(struct exfat_dentry);
- return 0;
-}
-
-off_t exfat_de_iter_file_offset(struct exfat_de_iter *iter)
-{
- return iter->de_file_offset;
-}
#include "exfat_ondisk.h"
#include "libexfat.h"
-#include "fsck.h"
#include "repair.h"
+#include "exfat_fs.h"
+#include "exfat_dir.h"
+#include "fsck.h"
struct fsck_user_input {
struct exfat_user_input ei;
#define EXFAT_MAX_UPCASE_CHARS 0x10000
-#ifdef WORDS_BIGENDIAN
-typedef __u8 bitmap_t;
-#else
-typedef __u32 bitmap_t;
-#endif
-
-#define BITS_PER (sizeof(bitmap_t) * 8)
-#define BIT_MASK(__c) (1 << ((__c) % BITS_PER))
-#define BIT_ENTRY(__c) ((__c) / BITS_PER)
-
-#define EXFAT_BITMAP_SIZE(__c_count) \
- (DIV_ROUND_UP(__c_count, BITS_PER) * sizeof(bitmap_t))
-#define EXFAT_BITMAP_GET(__bmap, __c) \
- (((bitmap_t *)(__bmap))[BIT_ENTRY(__c)] & BIT_MASK(__c))
-#define EXFAT_BITMAP_SET(__bmap, __c) \
- (((bitmap_t *)(__bmap))[BIT_ENTRY(__c)] |= \
- BIT_MASK(__c))
-
#define FSCK_EXIT_NO_ERRORS 0x00
#define FSCK_EXIT_CORRECTED 0x01
#define FSCK_EXIT_NEED_REBOOT 0x02
long fixed_count;
};
-struct path_resolve_ctx {
- struct exfat_inode *ancestors[255];
- __le16 utf16_path[PATH_MAX + 2];
- char local_path[PATH_MAX * MB_LEN_MAX + 1];
-};
-
+struct exfat_fsck exfat_fsck;
struct exfat_stat exfat_stat;
struct path_resolve_ctx path_resolve_ctx;
{"repair-yes", no_argument, NULL, 'y' },
{"repair-no", no_argument, NULL, 'n' },
{"repair-auto", no_argument, NULL, 'p' },
+ {"rescue", no_argument, NULL, 's' },
{"version", no_argument, NULL, 'V' },
{"verbose", no_argument, NULL, 'v' },
{"help", no_argument, NULL, 'h' },
{"?", no_argument, NULL, '?' },
+ {"ignore-bad-fs", no_argument, NULL, 'b' },
{NULL, 0, NULL, 0 }
};
fprintf(stderr, "\t-n | --repair-no No repair\n");
fprintf(stderr, "\t-p | --repair-auto Repair automatically\n");
fprintf(stderr, "\t-a Repair automatically\n");
+ fprintf(stderr, "\t-b | --ignore-bad-fs Try to recover even if exfat is not found\n");
+ fprintf(stderr, "\t-s | --rescue Assign orphaned clusters to files\n");
fprintf(stderr, "\t-V | --version Show version\n");
fprintf(stderr, "\t-v | --verbose Print debug\n");
fprintf(stderr, "\t-h | --help Show help\n");
#define fsck_err(parent, inode, fmt, ...) \
({ \
- resolve_path_parent(&path_resolve_ctx, \
+ exfat_resolve_path_parent(&path_resolve_ctx, \
parent, inode); \
exfat_err("ERROR: %s: " fmt, \
path_resolve_ctx.local_path, \
##__VA_ARGS__); \
})
-static struct exfat_inode *alloc_exfat_inode(__u16 attr)
-{
- struct exfat_inode *node;
- int size;
-
- size = offsetof(struct exfat_inode, name) + NAME_BUFFER_SIZE;
- node = (struct exfat_inode *)calloc(1, size);
- if (!node) {
- exfat_err("failed to allocate exfat_node\n");
- return NULL;
- }
-
- node->parent = NULL;
- INIT_LIST_HEAD(&node->children);
- INIT_LIST_HEAD(&node->sibling);
- INIT_LIST_HEAD(&node->list);
-
- node->last_pclus = EXFAT_EOF_CLUSTER;
- node->attr = attr;
- if (attr & ATTR_SUBDIR)
- exfat_stat.dir_count++;
- else
- exfat_stat.file_count++;
- return node;
-}
-
-static void free_exfat_inode(struct exfat_inode *node)
-{
- free(node);
-}
-
-static void inode_free_children(struct exfat_inode *dir, bool file_only)
-{
- struct exfat_inode *node, *i;
-
- list_for_each_entry_safe(node, i, &dir->children, sibling) {
- if (file_only) {
- if (!(node->attr & ATTR_SUBDIR)) {
- list_del(&node->sibling);
- free_exfat_inode(node);
- }
- } else {
- list_del(&node->sibling);
- list_del(&node->list);
- free_exfat_inode(node);
- }
- }
-}
-
-static void inode_free_file_children(struct exfat_inode *dir)
-{
- inode_free_children(dir, true);
-}
-
-/* delete @child and all ancestors that does not have
- * children
- */
-static void inode_free_ancestors(struct exfat_inode *child)
-{
- struct exfat_inode *parent;
-
- if (!list_empty(&child->children))
- return;
-
- do {
- if (!(child->attr & ATTR_SUBDIR)) {
- exfat_err("not directory.\n");
- return;
- }
-
- parent = child->parent;
- list_del(&child->sibling);
- free_exfat_inode(child);
-
- child = parent;
- } while (child && list_empty(&child->children));
-
- return;
-}
-
-static void free_exfat(struct exfat *exfat)
-{
- int i;
-
- if (exfat) {
- if (exfat->bs)
- free(exfat->bs);
- if (exfat->alloc_bitmap)
- free(exfat->alloc_bitmap);
- if (exfat->disk_bitmap)
- free(exfat->disk_bitmap);
- for (i = 0; i < 2; i++) {
- if (exfat->buffer_desc[i].buffer)
- free(exfat->buffer_desc[i].buffer);
- if (exfat->buffer_desc[i].dirty)
- free(exfat->buffer_desc[i].dirty);
- }
- free(exfat);
- }
-}
-
-static int init_exfat(struct exfat *exfat, struct pbr *bs)
-{
- int i;
-
- INIT_LIST_HEAD(&exfat->dir_list);
- exfat->bs = bs;
- exfat->clus_count = le32_to_cpu(bs->bsx.clu_count);
- exfat->clus_size = EXFAT_CLUSTER_SIZE(bs);
- exfat->sect_size = EXFAT_SECTOR_SIZE(bs);
-
- /* TODO: bitmap could be very large. */
- exfat->alloc_bitmap = (char *)calloc(1,
- EXFAT_BITMAP_SIZE(exfat->clus_count));
- if (!exfat->alloc_bitmap) {
- exfat_err("failed to allocate bitmap\n");
- goto err;
- }
-
- exfat->disk_bitmap = (char *)malloc(
- EXFAT_BITMAP_SIZE(exfat->clus_count));
- if (!exfat->disk_bitmap) {
- exfat_err("failed to allocate bitmap\n");
- goto err;
- }
-
- /* allocate cluster buffers */
- for (i = 0; i < 2; i++) {
- exfat->buffer_desc[i].buffer =
- (char *)malloc(exfat->clus_size);
- if (!exfat->buffer_desc[i].buffer)
- goto err;
- exfat->buffer_desc[i].dirty =
- (char *)calloc(
- (exfat->clus_size / exfat->sect_size), 1);
- if (!exfat->buffer_desc[i].dirty)
- goto err;
- }
- return 0;
-err:
- free_exfat(exfat);
- return -ENOMEM;
-}
-
-static void exfat_free_dir_list(struct exfat *exfat)
-{
- struct exfat_inode *dir, *i;
-
- list_for_each_entry_safe(dir, i, &exfat->dir_list, list) {
- inode_free_file_children(dir);
- list_del(&dir->list);
- free_exfat_inode(dir);
- }
-}
-
-/*
- * get references of ancestors that include @child until the count of
- * ancestors is not larger than @count and the count of characters of
- * their names is not larger than @max_char_len.
- * return true if root is reached.
- */
-bool get_ancestors(struct exfat_inode *child,
- struct exfat_inode **ancestors, int count,
- int max_char_len,
- int *ancestor_count)
-{
- struct exfat_inode *dir;
- int name_len, char_len;
- int root_depth, depth, i;
-
- root_depth = 0;
- char_len = 0;
- max_char_len += 1;
-
- dir = child;
- while (dir) {
- name_len = exfat_utf16_len(dir->name, NAME_BUFFER_SIZE);
- if (char_len + name_len > max_char_len)
- break;
-
- /* include '/' */
- char_len += name_len + 1;
- root_depth++;
-
- dir = dir->parent;
- }
-
- depth = MIN(root_depth, count);
-
- for (dir = child, i = depth - 1; i >= 0; dir = dir->parent, i--)
- ancestors[i] = dir;
-
- *ancestor_count = depth;
- return dir == NULL;
-}
-
-static int resolve_path(struct path_resolve_ctx *ctx, struct exfat_inode *child)
-{
- int depth, i;
- int name_len;
- __le16 *utf16_path;
- static const __le16 utf16_slash = cpu_to_le16(0x002F);
- static const __le16 utf16_null = cpu_to_le16(0x0000);
- size_t in_size;
-
- ctx->local_path[0] = '\0';
-
- get_ancestors(child,
- ctx->ancestors,
- sizeof(ctx->ancestors) / sizeof(ctx->ancestors[0]),
- PATH_MAX,
- &depth);
-
- utf16_path = ctx->utf16_path;
- for (i = 0; i < depth; i++) {
- name_len = exfat_utf16_len(ctx->ancestors[i]->name,
- NAME_BUFFER_SIZE);
- memcpy((char *)utf16_path, (char *)ctx->ancestors[i]->name,
- name_len * 2);
- utf16_path += name_len;
- memcpy((char *)utf16_path, &utf16_slash, sizeof(utf16_slash));
- utf16_path++;
- }
-
- if (depth > 0)
- utf16_path--;
- memcpy((char *)utf16_path, &utf16_null, sizeof(utf16_null));
- utf16_path++;
-
- in_size = (utf16_path - ctx->utf16_path) * sizeof(__le16);
- return exfat_utf16_dec(ctx->utf16_path, in_size,
- ctx->local_path, sizeof(ctx->local_path));
-}
-
-static int resolve_path_parent(struct path_resolve_ctx *ctx,
- struct exfat_inode *parent, struct exfat_inode *child)
-{
- int ret;
- struct exfat_inode *old;
-
- old = child->parent;
- child->parent = parent;
-
- ret = resolve_path(ctx, child);
- child->parent = old;
- return ret;
-}
-
#define repair_file_ask(iter, inode, code, fmt, ...) \
({ \
- resolve_path_parent(&path_resolve_ctx, \
- (iter)->parent, inode); \
- exfat_repair_ask((iter)->exfat, code, \
- "ERROR: %s: " fmt, \
- path_resolve_ctx.local_path, \
- ##__VA_ARGS__); \
+ if (inode) \
+ exfat_resolve_path_parent(&path_resolve_ctx, \
+ (iter)->parent, inode); \
+ else \
+ exfat_resolve_path(&path_resolve_ctx, \
+ (iter)->parent); \
+ exfat_repair_ask(&exfat_fsck, code, \
+ "ERROR: %s: " fmt " at %#" PRIx64, \
+ path_resolve_ctx.local_path, \
+ ##__VA_ARGS__, \
+ exfat_de_iter_device_offset(iter)); \
})
-static inline bool heap_clus(struct exfat *exfat, clus_t clus)
-{
- return clus >= EXFAT_FIRST_CLUSTER &&
- (clus - EXFAT_FIRST_CLUSTER) < exfat->clus_count;
-}
-
-int get_next_clus(struct exfat *exfat, struct exfat_inode *node,
- clus_t clus, clus_t *next)
-{
- off_t offset;
-
- *next = EXFAT_EOF_CLUSTER;
-
- if (!heap_clus(exfat, clus))
- return -EINVAL;
-
- if (node->is_contiguous) {
- *next = clus + 1;
- return 0;
- }
-
- offset = (off_t)le32_to_cpu(exfat->bs->bsx.fat_offset) <<
- exfat->bs->bsx.sect_size_bits;
- offset += sizeof(clus_t) * clus;
-
- if (exfat_read(exfat->blk_dev->dev_fd, next, sizeof(*next), offset)
- != sizeof(*next))
- return -EIO;
- *next = le32_to_cpu(*next);
- return 0;
-}
-
-static int set_fat(struct exfat *exfat, clus_t clus, clus_t next_clus)
-{
- off_t offset;
-
- offset = le32_to_cpu(exfat->bs->bsx.fat_offset) <<
- exfat->bs->bsx.sect_size_bits;
- offset += sizeof(clus_t) * clus;
-
- if (exfat_write(exfat->blk_dev->dev_fd, &next_clus, sizeof(next_clus),
- offset) != sizeof(next_clus))
- return -EIO;
- return 0;
-}
-
-static int check_clus_chain(struct exfat *exfat, struct exfat_inode *node)
+static int check_clus_chain(struct exfat_de_iter *de_iter,
+ struct exfat_inode *node)
{
+ struct exfat *exfat = de_iter->exfat;
struct exfat_dentry *stream_de;
clus_t clus, prev, next;
uint64_t count, max_count;
/* the first cluster is wrong */
if ((node->size == 0 && node->first_clus != EXFAT_FREE_CLUSTER) ||
- (node->size > 0 && !heap_clus(exfat, node->first_clus))) {
- if (repair_file_ask(&exfat->de_iter, node,
- ER_FILE_FIRST_CLUS, "first cluster is wrong"))
+ (node->size > 0 && !exfat_heap_clus(exfat, node->first_clus))) {
+ if (repair_file_ask(de_iter, node,
+ ER_FILE_FIRST_CLUS,
+ "size %#" PRIx64 ", but the first cluster %#x",
+ node->size, node->first_clus))
goto truncate_file;
else
return -EINVAL;
if (count >= max_count) {
if (node->is_contiguous)
break;
- if (repair_file_ask(&exfat->de_iter, node,
- ER_FILE_SMALLER_SIZE,
- "more clusters are allocated. "
- "truncate to %" PRIu64 " bytes",
- count * exfat->clus_size))
+ if (repair_file_ask(de_iter, node,
+ ER_FILE_SMALLER_SIZE,
+ "more clusters are allocated. truncate to %"
+ PRIu64 " bytes",
+ count * exfat->clus_size))
goto truncate_file;
else
return -EINVAL;
* This cluster is already allocated. it may be shared with
* the other file, or there is a loop in cluster chain.
*/
- if (EXFAT_BITMAP_GET(exfat->alloc_bitmap,
- clus - EXFAT_FIRST_CLUSTER)) {
- if (repair_file_ask(&exfat->de_iter, node,
- ER_FILE_DUPLICATED_CLUS,
- "cluster is already allocated for "
- "the other file. truncated to %"
- PRIu64 " bytes",
- count * exfat->clus_size))
+ if (exfat_bitmap_get(exfat->alloc_bitmap, clus)) {
+ if (repair_file_ask(de_iter, node,
+ ER_FILE_DUPLICATED_CLUS,
+ "cluster is already allocated for the other file. truncated to %"
+ PRIu64 " bytes",
+ count * exfat->clus_size))
goto truncate_file;
else
return -EINVAL;
}
- if (!EXFAT_BITMAP_GET(exfat->disk_bitmap,
- clus - EXFAT_FIRST_CLUSTER)) {
- if (repair_file_ask(&exfat->de_iter, node,
- ER_FILE_INVALID_CLUS,
- "cluster is marked as free. truncate to %" PRIu64 " bytes",
- count * exfat->clus_size))
- goto truncate_file;
-
- else
+ if (!exfat_bitmap_get(exfat->disk_bitmap, clus)) {
+ if (!repair_file_ask(de_iter, node,
+ ER_FILE_INVALID_CLUS,
+ "cluster %#x is marked as free",
+ clus))
return -EINVAL;
}
/* This cluster is allocated or not */
- if (get_next_clus(exfat, node, clus, &next))
+ if (exfat_get_inode_next_clus(exfat, node, clus, &next))
goto truncate_file;
- if (!node->is_contiguous) {
- if (!heap_clus(exfat, next) &&
- next != EXFAT_EOF_CLUSTER) {
- if (repair_file_ask(&exfat->de_iter, node,
- ER_FILE_INVALID_CLUS,
- "broken cluster chain. "
- "truncate to %"
- PRIu64 " bytes",
- count * exfat->clus_size))
+ if (next == EXFAT_BAD_CLUSTER) {
+ if (repair_file_ask(de_iter, node,
+ ER_FILE_INVALID_CLUS,
+ "BAD cluster. truncate to %"
+ PRIu64 " bytes",
+ count * exfat->clus_size))
+ goto truncate_file;
+ else
+ return -EINVAL;
+ } else if (!node->is_contiguous) {
+ if (next != EXFAT_EOF_CLUSTER &&
+ !exfat_heap_clus(exfat, next)) {
+ if (repair_file_ask(de_iter, node,
+ ER_FILE_INVALID_CLUS,
+ "broken cluster chain. truncate to %"
+ PRIu64 " bytes",
+ (count + 1) * exfat->clus_size)) {
+ count++;
+ prev = clus;
+ exfat_bitmap_set(exfat->alloc_bitmap,
+ clus);
goto truncate_file;
-
- else
+ } else {
return -EINVAL;
+ }
}
}
count++;
- EXFAT_BITMAP_SET(exfat->alloc_bitmap,
- clus - EXFAT_FIRST_CLUSTER);
+ exfat_bitmap_set(exfat->alloc_bitmap, clus);
prev = clus;
clus = next;
}
if (count < max_count) {
- if (repair_file_ask(&exfat->de_iter, node,
- ER_FILE_LARGER_SIZE, "less clusters are allocated. "
- "truncates to %" PRIu64 " bytes",
- count * exfat->clus_size))
+ if (repair_file_ask(de_iter, node, ER_FILE_LARGER_SIZE,
+ "less clusters are allocated. truncates to %"
+ PRIu64 " bytes",
+ count * exfat->clus_size))
goto truncate_file;
else
return -EINVAL;
return 0;
truncate_file:
node->size = count * exfat->clus_size;
- if (!heap_clus(exfat, prev))
+ if (!exfat_heap_clus(exfat, prev))
node->first_clus = EXFAT_FREE_CLUSTER;
- exfat_de_iter_get_dirty(&exfat->de_iter, 1, &stream_de);
+ exfat_de_iter_get_dirty(de_iter, 1, &stream_de);
if (count * exfat->clus_size <
- le64_to_cpu(stream_de->stream_valid_size))
+ le64_to_cpu(stream_de->stream_valid_size))
stream_de->stream_valid_size = cpu_to_le64(
- count * exfat->clus_size);
- if (!heap_clus(exfat, prev))
+ count * exfat->clus_size);
+ if (!exfat_heap_clus(exfat, prev))
stream_de->stream_start_clu = EXFAT_FREE_CLUSTER;
stream_de->stream_size = cpu_to_le64(
- count * exfat->clus_size);
+ count * exfat->clus_size);
/* remaining clusters will be freed while FAT is compared with
* alloc_bitmap.
*/
- if (!node->is_contiguous && heap_clus(exfat, prev))
- return set_fat(exfat, prev, EXFAT_EOF_CLUSTER);
+ if (!node->is_contiguous && exfat_heap_clus(exfat, prev)) {
+ if (exfat_set_fat(exfat, prev, EXFAT_EOF_CLUSTER))
+ return -EIO;
+ }
return 1;
}
-static bool root_get_clus_count(struct exfat *exfat, struct exfat_inode *node,
- clus_t *clus_count)
+static int root_check_clus_chain(struct exfat *exfat,
+ struct exfat_inode *node,
+ clus_t *clus_count)
{
- clus_t clus;
+ clus_t clus, next, prev = EXFAT_EOF_CLUSTER;
+
+ if (!exfat_heap_clus(exfat, node->first_clus))
+ goto out_trunc;
clus = node->first_clus;
*clus_count = 0;
do {
- if (!heap_clus(exfat, clus)) {
- exfat_err("/: bad cluster. 0x%x\n", clus);
- return false;
+ if (exfat_bitmap_get(exfat->alloc_bitmap, clus)) {
+ if (exfat_repair_ask(&exfat_fsck,
+ ER_FILE_DUPLICATED_CLUS,
+ "ERROR: the cluster chain of root is cyclic"))
+ goto out_trunc;
+ return -EINVAL;
}
- if (EXFAT_BITMAP_GET(exfat->alloc_bitmap,
- clus - EXFAT_FIRST_CLUSTER)) {
- exfat_err("/: cluster is already allocated, or "
- "there is a loop in cluster chain\n");
- return false;
- }
+ exfat_bitmap_set(exfat->alloc_bitmap, clus);
- EXFAT_BITMAP_SET(exfat->alloc_bitmap,
- clus - EXFAT_FIRST_CLUSTER);
+ if (exfat_get_inode_next_clus(exfat, node, clus, &next)) {
+ exfat_err("ERROR: failed to read the fat entry of root");
+ goto out_trunc;
+ }
- if (get_next_clus(exfat, node, clus, &clus) != 0) {
- exfat_err("/: broken cluster chain\n");
- return false;
+ if (next != EXFAT_EOF_CLUSTER && !exfat_heap_clus(exfat, next)) {
+ if (exfat_repair_ask(&exfat_fsck,
+ ER_FILE_INVALID_CLUS,
+ "ERROR: the cluster chain of root is broken")) {
+ if (next != EXFAT_BAD_CLUSTER) {
+ prev = clus;
+ (*clus_count)++;
+ }
+ goto out_trunc;
+ }
+ return -EINVAL;
}
+ prev = clus;
+ clus = next;
(*clus_count)++;
} while (clus != EXFAT_EOF_CLUSTER);
- return true;
-}
-
-static off_t exfat_s2o(struct exfat *exfat, off_t sect)
-{
- return sect << exfat->bs->bsx.sect_size_bits;
-}
-
-off_t exfat_c2o(struct exfat *exfat, unsigned int clus)
-{
- if (clus < EXFAT_FIRST_CLUSTER)
- return ~0L;
- return exfat_s2o(exfat, le32_to_cpu(exfat->bs->bsx.clu_offset) +
- ((off_t)(clus - EXFAT_FIRST_CLUSTER) <<
- exfat->bs->bsx.sect_per_clus_bits));
+ return 0;
+out_trunc:
+ if (!exfat_heap_clus(exfat, prev)) {
+ exfat_err("ERROR: the start cluster of root is wrong\n");
+ return -EINVAL;
+ }
+ node->size = *clus_count * exfat->clus_size;
+ return exfat_set_fat(exfat, prev, EXFAT_EOF_CLUSTER);
}
static int boot_region_checksum(int dev_fd,
{
uint16_t flags;
- if (!(exfat->options & FSCK_OPTS_REPAIR_WRITE))
- return 0;
-
flags = le16_to_cpu(exfat->bs->bsx.vol_flags);
if (dirty)
flags |= 0x02;
return ret;
}
-static int exfat_boot_region_check(struct exfat *exfat, struct pbr **bs)
+static int exfat_boot_region_check(struct exfat_blk_dev *blkdev,
+ struct pbr **bs,
+ bool ignore_bad_fs_name)
{
struct pbr *boot_sect;
unsigned int sect_size;
if (boot_sect == NULL)
return -ENOMEM;
- if (exfat_read(exfat->blk_dev->dev_fd, boot_sect,
+ if (exfat_read(blkdev->dev_fd, boot_sect,
sizeof(*boot_sect), 0) != (ssize_t)sizeof(*boot_sect)) {
exfat_err("failed to read Main boot sector\n");
+ free(boot_sect);
return -EIO;
}
+ if (memcmp(boot_sect->bpb.oem_name, "EXFAT ", 8) != 0 &&
+ !ignore_bad_fs_name) {
+ exfat_err("Bad fs_name in boot sector, which does not describe a valid exfat filesystem\n");
+ free(boot_sect);
+ return -ENOTSUP;
+ }
+
sect_size = 1 << boot_sect->bsx.sect_size_bits;
free(boot_sect);
/* check boot regions */
- ret = read_boot_region(exfat->blk_dev, bs,
+ ret = read_boot_region(blkdev, bs,
BOOT_SEC_IDX, sect_size, true);
- if (ret == -EINVAL && exfat_repair_ask(exfat, ER_BS_BOOT_REGION,
- "boot region is corrupted. try to restore the region from backup"
+ if (ret == -EINVAL &&
+ exfat_repair_ask(&exfat_fsck, ER_BS_BOOT_REGION,
+ "boot region is corrupted. try to restore the region from backup"
)) {
const unsigned int sector_sizes[] = {512, 4096, 1024, 2048};
unsigned int i;
if (sect_size >= 512 && sect_size <= EXFAT_MAX_SECTOR_SIZE) {
- ret = read_boot_region(exfat->blk_dev, bs,
+ ret = read_boot_region(blkdev, bs,
BACKUP_BOOT_SEC_IDX, sect_size,
false);
if (!ret)
if (sector_sizes[i] == sect_size)
continue;
- ret = read_boot_region(exfat->blk_dev, bs,
+ ret = read_boot_region(blkdev, bs,
BACKUP_BOOT_SEC_IDX,
sector_sizes[i], false);
if (!ret) {
return ret;
restore:
- ret = restore_boot_region(exfat->blk_dev, sect_size);
+ ret = restore_boot_region(blkdev, sect_size);
if (ret) {
exfat_err("failed to restore boot region from backup\n");
free(*bs);
return ret;
}
-static void dentry_calc_checksum(struct exfat_dentry *dentry,
- __le16 *checksum, bool primary)
+static uint16_t file_calc_checksum(struct exfat_de_iter *iter)
{
- unsigned int i;
- uint8_t *bytes;
-
- bytes = (uint8_t *)dentry;
-
- *checksum = ((*checksum << 15) | (*checksum >> 1)) + bytes[0];
- *checksum = ((*checksum << 15) | (*checksum >> 1)) + bytes[1];
-
- i = primary ? 4 : 2;
- for (; i < sizeof(*dentry); i++) {
- *checksum = ((*checksum << 15) | (*checksum >> 1)) + bytes[i];
- }
-}
-
-static __le16 file_calc_checksum(struct exfat_de_iter *iter)
-{
- __le16 checksum;
+ uint16_t checksum;
struct exfat_dentry *file_de, *de;
int i;
checksum = 0;
exfat_de_iter_get(iter, 0, &file_de);
- dentry_calc_checksum(file_de, &checksum, true);
+ exfat_calc_dentry_checksum(file_de, &checksum, true);
for (i = 1; i <= file_de->file_num_ext; i++) {
exfat_de_iter_get(iter, i, &de);
- dentry_calc_checksum(de, &checksum, false);
+ exfat_calc_dentry_checksum(de, &checksum, false);
}
-
return checksum;
}
uint16_t checksum;
bool valid = true;
- ret = check_clus_chain(exfat, node);
+ ret = check_clus_chain(iter, node);
if (ret < 0)
return ret;
if (node->size == 0 && node->is_contiguous) {
if (repair_file_ask(iter, node, ER_FILE_ZERO_NOFAT,
- "empty, but has no Fat chain\n")) {
+ "empty, but has no Fat chain")) {
exfat_de_iter_get_dirty(iter, 1, &dentry);
dentry->stream_flags &= ~EXFAT_SF_CONTIGUOUS;
ret = 1;
checksum = file_calc_checksum(iter);
exfat_de_iter_get(iter, 0, &dentry);
if (checksum != le16_to_cpu(dentry->file_checksum)) {
- if (repair_file_ask(iter, node, ER_DE_CHECKSUM,
- "the checksum of a file is wrong")) {
- exfat_de_iter_get_dirty(iter, 0, &dentry);
- dentry->file_checksum = cpu_to_le16(checksum);
- ret = 1;
- } else
- valid = false;
+ exfat_de_iter_get_dirty(iter, 0, &dentry);
+ dentry->file_checksum = cpu_to_le16(checksum);
+ ret = 1;
}
return valid ? ret : -EINVAL;
}
-static int read_file_dentries(struct exfat_de_iter *iter,
- struct exfat_inode **new_node, int *skip_dentries)
+static int check_name_dentry_set(struct exfat_de_iter *iter,
+ struct exfat_inode *inode)
{
- struct exfat_dentry *file_de, *stream_de, *name_de;
- struct exfat_inode *node;
- int i, ret;
+ struct exfat_dentry *stream_de;
+ size_t name_len;
+ __u16 hash;
+
+ exfat_de_iter_get(iter, 1, &stream_de);
+
+ name_len = exfat_utf16_len(inode->name, NAME_BUFFER_SIZE);
+ if (stream_de->stream_name_len != name_len) {
+ if (repair_file_ask(iter, NULL, ER_DE_NAME_LEN,
+ "the name length of a file is wrong")) {
+ exfat_de_iter_get_dirty(iter, 1, &stream_de);
+ stream_de->stream_name_len = (__u8)name_len;
+ } else {
+ return -EINVAL;
+ }
+ }
+
+ hash = exfat_calc_name_hash(iter->exfat, inode->name, (int)name_len);
+ if (cpu_to_le16(hash) != stream_de->stream_name_hash) {
+ if (repair_file_ask(iter, NULL, ER_DE_NAME_HASH,
+ "the name hash of a file is wrong")) {
+ exfat_de_iter_get_dirty(iter, 1, &stream_de);
+ stream_de->stream_name_hash = cpu_to_le16(hash);
+ } else {
+ return -EINVAL;
+ }
+ }
+ return 0;
+}
+
+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->dot_name_num > DOT_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->dot_name_num++);
+ err = exfat_lookup_file(iter->exfat, iter->parent, rename,
+ &filter);
+ if (!err)
+ continue;
+ break;
+ }
+
+ return rename;
+}
+
+const __le16 MSDOS_DOT[ENTRY_NAME_MAX] = {cpu_to_le16(46), 0, };
+const __le16 MSDOS_DOTDOT[ENTRY_NAME_MAX] = {cpu_to_le16(46), cpu_to_le16(46), 0, };
+
+static int handle_dot_dotdot_filename(struct exfat_de_iter *iter,
+ struct exfat_dentry *dentry,
+ int strm_name_len)
+{
+ char *filename;
+ char error_msg[150];
+ int num;
+
+ if (!memcmp(dentry->name_unicode, MSDOS_DOT, strm_name_len * 2))
+ filename = ".";
+ else if (!memcmp(dentry->name_unicode, MSDOS_DOTDOT,
+ strm_name_len * 2))
+ filename = "..";
+ else
+ return 0;
+
+ sprintf(error_msg, "ERROR: '%s' filename is not allowed.\n"
+ " [1] Insert the name you want to rename.\n"
+ " [2] Automatically renames filename.\n"
+ " [3] Bypass this check(No repair)\n", filename);
+ask_again:
+ num = exfat_repair_ask(&exfat_fsck, ER_DE_DOT_NAME,
+ error_msg);
+ if (num) {
+ __le16 utf16_name[ENTRY_NAME_MAX];
+ char *rename = NULL;
+ __u16 hash;
+ struct exfat_dentry *stream_de;
+ int name_len, ret;
+
+ 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", filename, 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;
+
+ memcpy(dentry->name_unicode, utf16_name, ENTRY_NAME_MAX * 2);
+ name_len = exfat_utf16_len(utf16_name, ENTRY_NAME_MAX * 2);
+ hash = exfat_calc_name_hash(iter->exfat, utf16_name, (int)name_len);
+ exfat_de_iter_get_dirty(iter, 1, &stream_de);
+ stream_de->stream_name_len = (__u8)name_len;
+ stream_de->stream_name_hash = cpu_to_le16(hash);
+ }
+
+ return 0;
+}
- /* TODO: mtime, atime, ... */
+static int read_file_dentry_set(struct exfat_de_iter *iter,
+ struct exfat_inode **new_node, int *skip_dentries)
+{
+ struct exfat_dentry *file_de, *stream_de, *dentry;
+ struct exfat_inode *node = NULL;
+ int i, ret;
+ bool need_delete = false;
+ uint16_t checksum;
ret = exfat_de_iter_get(iter, 0, &file_de);
if (ret || file_de->type != EXFAT_FILE) {
- exfat_err("failed to get file dentry. %d\n", ret);
+ exfat_err("failed to get file dentry\n");
return -EINVAL;
}
+
+ checksum = file_calc_checksum(iter);
+ if (checksum != le16_to_cpu(file_de->file_checksum)) {
+ if (repair_file_ask(iter, NULL, ER_DE_CHECKSUM,
+ "the checksum of a file is wrong"))
+ need_delete = true;
+ *skip_dentries = 1;
+ goto skip_dset;
+ }
+
+ if (file_de->file_num_ext < 2) {
+ if (repair_file_ask(iter, NULL, ER_DE_SECONDARY_COUNT,
+ "a file has too few secondary count. %d",
+ file_de->file_num_ext))
+ need_delete = true;
+ *skip_dentries = 1;
+ goto skip_dset;
+ }
+
ret = exfat_de_iter_get(iter, 1, &stream_de);
if (ret || stream_de->type != EXFAT_STREAM) {
- exfat_err("failed to get stream dentry. %d\n", ret);
- return -EINVAL;
+ if (repair_file_ask(iter, NULL, ER_DE_STREAM,
+ "failed to get stream dentry"))
+ need_delete = true;
+ *skip_dentries = 2;
+ goto skip_dset;
}
*new_node = NULL;
- node = alloc_exfat_inode(le16_to_cpu(file_de->file_attr));
+ node = exfat_alloc_inode(le16_to_cpu(file_de->file_attr));
if (!node)
return -ENOMEM;
- if (file_de->file_num_ext < 2) {
- exfat_err("too few secondary count. %d\n",
- file_de->file_num_ext);
- free_exfat_inode(node);
- return -EINVAL;
- }
-
for (i = 2; i <= file_de->file_num_ext; i++) {
- ret = exfat_de_iter_get(iter, i, &name_de);
- if (ret || name_de->type != EXFAT_NAME) {
- exfat_err("failed to get name dentry. %d\n", ret);
- ret = -EINVAL;
- goto err;
+ ret = exfat_de_iter_get(iter, i, &dentry);
+ if (ret || dentry->type != EXFAT_NAME) {
+ if (i > 2 && repair_file_ask(iter, NULL, ER_DE_NAME,
+ "failed to get name dentry")) {
+ exfat_de_iter_get_dirty(iter, 0, &file_de);
+ file_de->file_num_ext = i - 1;
+ break;
+ }
+ *skip_dentries = i + 1;
+ goto skip_dset;
}
memcpy(node->name +
- (i-2) * ENTRY_NAME_MAX, name_de->name_unicode,
- sizeof(name_de->name_unicode));
+ (i - 2) * ENTRY_NAME_MAX, dentry->name_unicode,
+ sizeof(dentry->name_unicode));
+ }
+
+ ret = check_name_dentry_set(iter, node);
+ if (ret) {
+ *skip_dentries = file_de->file_num_ext + 1;
+ goto skip_dset;
+ }
+
+ if (file_de->file_num_ext == 2 && stream_de->stream_name_len <= 2) {
+ ret = handle_dot_dotdot_filename(iter, dentry,
+ stream_de->stream_name_len);
+ if (ret < 0) {
+ *skip_dentries = file_de->file_num_ext + 1;
+ goto skip_dset;
+ }
}
node->first_clus = le32_to_cpu(stream_de->stream_start_clu);
node->size = le64_to_cpu(stream_de->stream_size);
if (node->size < le64_to_cpu(stream_de->stream_valid_size)) {
+ *skip_dentries = file_de->file_num_ext + 1;
if (repair_file_ask(iter, node, ER_FILE_VALID_SIZE,
- "valid size %" PRIu64 " greater than size %" PRIu64,
- le64_to_cpu(stream_de->stream_valid_size),
- node->size)) {
+ "valid size %" PRIu64 " greater than size %" PRIu64,
+ le64_to_cpu(stream_de->stream_valid_size),
+ node->size)) {
exfat_de_iter_get_dirty(iter, 1, &stream_de);
stream_de->stream_valid_size =
stream_de->stream_size;
} else {
- ret = -EINVAL;
- goto err;
+ *skip_dentries = file_de->file_num_ext + 1;
+ goto skip_dset;
}
}
*skip_dentries = (file_de->file_num_ext + 1);
*new_node = node;
return 0;
-err:
- *skip_dentries = 0;
+skip_dset:
+ if (need_delete) {
+ exfat_de_iter_get_dirty(iter, 0, &dentry);
+ dentry->type &= EXFAT_DELETE;
+ }
+ for (i = 1; i < *skip_dentries; i++) {
+ exfat_de_iter_get(iter, i, &dentry);
+ if (dentry->type == EXFAT_FILE)
+ break;
+ if (need_delete) {
+ exfat_de_iter_get_dirty(iter, i, &dentry);
+ dentry->type &= EXFAT_DELETE;
+ }
+ }
+ *skip_dentries = i;
*new_node = NULL;
- free_exfat_inode(node);
- return ret;
+ exfat_free_inode(node);
+ return need_delete ? 1 : -EINVAL;
}
static int read_file(struct exfat_de_iter *de_iter,
*new_node = NULL;
- ret = read_file_dentries(de_iter, &node, dentry_count);
+ ret = read_file_dentry_set(de_iter, &node, dentry_count);
if (ret)
return ret;
ret = check_inode(de_iter, node);
if (ret < 0) {
- free_exfat_inode(node);
+ exfat_free_inode(node);
return -EINVAL;
}
+ if (node->attr & ATTR_SUBDIR)
+ exfat_stat.dir_count++;
+ else
+ exfat_stat.file_count++;
*new_node = node;
return ret;
}
-static bool read_volume_label(struct exfat_de_iter *iter)
-{
- struct exfat *exfat;
- struct exfat_dentry *dentry;
- __le16 disk_label[VOLUME_LABEL_MAX_LEN];
-
- exfat = iter->exfat;
- if (exfat_de_iter_get(iter, 0, &dentry))
- return false;
-
- if (dentry->vol_char_cnt == 0)
- return true;
-
- if (dentry->vol_char_cnt > VOLUME_LABEL_MAX_LEN) {
- exfat_err("too long label. %d\n", dentry->vol_char_cnt);
- return false;
- }
-
- memcpy(disk_label, dentry->vol_label, sizeof(disk_label));
- if (exfat_utf16_dec(disk_label, dentry->vol_char_cnt*2,
- exfat->volume_label, sizeof(exfat->volume_label)) < 0) {
- exfat_err("failed to decode volume label\n");
- return false;
- }
-
- exfat_info("volume label [%s]\n", exfat->volume_label);
- return true;
-}
-
-static void exfat_bitmap_set_range(struct exfat *exfat,
- clus_t start_clus, clus_t count)
-{
- clus_t clus;
-
- if (!heap_clus(exfat, start_clus) ||
- !heap_clus(exfat, start_clus + count))
- return;
-
- clus = start_clus;
- while (clus < start_clus + count) {
- EXFAT_BITMAP_SET(exfat->alloc_bitmap,
- clus - EXFAT_FIRST_CLUSTER);
- clus++;
- }
-}
-
-static bool read_bitmap(struct exfat_de_iter *iter)
+static int read_bitmap(struct exfat *exfat)
{
+ struct exfat_lookup_filter filter = {
+ .in.type = EXFAT_BITMAP,
+ .in.filter = NULL,
+ .in.param = NULL,
+ };
struct exfat_dentry *dentry;
- struct exfat *exfat;
+ int retval;
- exfat = iter->exfat;
- if (exfat_de_iter_get(iter, 0, &dentry))
- return false;
+ retval = exfat_lookup_dentry_set(exfat, exfat->root, &filter);
+ if (retval)
+ return retval;
+ dentry = filter.out.dentry_set;
exfat_debug("start cluster %#x, size %#" PRIx64 "\n",
le32_to_cpu(dentry->bitmap_start_clu),
le64_to_cpu(dentry->bitmap_size));
DIV_ROUND_UP(exfat->clus_count, 8)) {
exfat_err("invalid size of allocation bitmap. 0x%" PRIx64 "\n",
le64_to_cpu(dentry->bitmap_size));
- return false;
+ return -EINVAL;
}
- if (!heap_clus(exfat, le32_to_cpu(dentry->bitmap_start_clu))) {
+ if (!exfat_heap_clus(exfat, le32_to_cpu(dentry->bitmap_start_clu))) {
exfat_err("invalid start cluster of allocate bitmap. 0x%x\n",
le32_to_cpu(dentry->bitmap_start_clu));
- return false;
+ return -EINVAL;
}
exfat->disk_bitmap_clus = le32_to_cpu(dentry->bitmap_start_clu);
exfat->disk_bitmap_size = DIV_ROUND_UP(exfat->clus_count, 8);
- exfat_bitmap_set_range(exfat, le64_to_cpu(dentry->bitmap_start_clu),
- DIV_ROUND_UP(exfat->disk_bitmap_size,
- exfat->clus_size));
+ exfat_bitmap_set_range(exfat, exfat->alloc_bitmap,
+ le64_to_cpu(dentry->bitmap_start_clu),
+ DIV_ROUND_UP(exfat->disk_bitmap_size,
+ exfat->clus_size));
+ free(filter.out.dentry_set);
if (exfat_read(exfat->blk_dev->dev_fd, exfat->disk_bitmap,
exfat->disk_bitmap_size,
exfat_c2o(exfat, exfat->disk_bitmap_clus)) !=
(ssize_t)exfat->disk_bitmap_size)
- return false;
+ return -EIO;
+ return 0;
+}
+
+static int decompress_upcase_table(const __le16 *in_table, size_t in_len,
+ __u16 *out_table, size_t out_len)
+{
+ size_t i, k;
+ uint16_t ch;
+
+ if (in_len > out_len)
+ return -E2BIG;
- return true;
+ for (k = 0; k < out_len; k++)
+ out_table[k] = k;
+
+ for (i = 0, k = 0; i < in_len && k < out_len; i++) {
+ ch = le16_to_cpu(in_table[i]);
+
+ if (ch == 0xFFFF && i + 1 < in_len) {
+ uint16_t len = le16_to_cpu(in_table[++i]);
+
+ k += len;
+ } else {
+ out_table[k++] = ch;
+ }
+ }
+ return 0;
}
-static bool read_upcase_table(struct exfat_de_iter *iter)
+static int read_upcase_table(struct exfat *exfat)
{
- struct exfat_dentry *dentry;
- struct exfat *exfat;
+ struct exfat_lookup_filter filter = {
+ .in.type = EXFAT_UPCASE,
+ .in.filter = NULL,
+ .in.param = NULL,
+ };
+ struct exfat_dentry *dentry = NULL;
+ __le16 *upcase = NULL;
+ int retval;
ssize_t size;
- __le16 *upcase;
__le32 checksum;
- exfat = iter->exfat;
+ retval = exfat_lookup_dentry_set(exfat, exfat->root, &filter);
+ if (retval)
+ return retval;
- if (exfat_de_iter_get(iter, 0, &dentry))
- return false;
+ dentry = filter.out.dentry_set;
- if (!heap_clus(exfat, le32_to_cpu(dentry->upcase_start_clu))) {
+ if (!exfat_heap_clus(exfat, le32_to_cpu(dentry->upcase_start_clu))) {
exfat_err("invalid start cluster of upcase table. 0x%x\n",
le32_to_cpu(dentry->upcase_start_clu));
- return false;
+ retval = -EINVAL;
+ goto out;
}
size = (ssize_t)le64_to_cpu(dentry->upcase_size);
size == 0 || size % sizeof(__le16)) {
exfat_err("invalid size of upcase table. 0x%" PRIx64 "\n",
le64_to_cpu(dentry->upcase_size));
- return false;
+ retval = -EINVAL;
+ goto out;
}
upcase = (__le16 *)malloc(size);
if (!upcase) {
exfat_err("failed to allocate upcase table\n");
- return false;
+ retval = -ENOMEM;
+ goto out;
}
if (exfat_read(exfat->blk_dev->dev_fd, upcase, size,
exfat_c2o(exfat,
le32_to_cpu(dentry->upcase_start_clu))) != size) {
exfat_err("failed to read upcase table\n");
- free(upcase);
- return false;
+ retval = -EIO;
+ goto out;
}
checksum = 0;
if (le32_to_cpu(dentry->upcase_checksum) != checksum) {
exfat_err("corrupted upcase table %#x (expected: %#x)\n",
checksum, le32_to_cpu(dentry->upcase_checksum));
- free(upcase);
- return false;
+ retval = -EINVAL;
+ goto out;
}
- exfat_bitmap_set_range(exfat, le32_to_cpu(dentry->upcase_start_clu),
- DIV_ROUND_UP(le64_to_cpu(dentry->upcase_size),
- exfat->clus_size));
+ exfat_bitmap_set_range(exfat, exfat->alloc_bitmap,
+ le32_to_cpu(dentry->upcase_start_clu),
+ DIV_ROUND_UP(le64_to_cpu(dentry->upcase_size),
+ exfat->clus_size));
+
+ exfat->upcase_table = calloc(1,
+ sizeof(uint16_t) * EXFAT_UPCASE_TABLE_CHARS);
+ if (!exfat->upcase_table) {
+ retval = -EIO;
+ goto out;
+ }
- free(upcase);
- return true;
+ decompress_upcase_table(upcase, size / 2,
+ exfat->upcase_table, EXFAT_UPCASE_TABLE_CHARS);
+out:
+ if (dentry)
+ free(dentry);
+ if (upcase)
+ free(upcase);
+ return retval;
}
-static int read_children(struct exfat *exfat, struct exfat_inode *dir)
+static int read_children(struct exfat_fsck *fsck, struct exfat_inode *dir)
{
- int ret;
+ struct exfat *exfat = fsck->exfat;
struct exfat_inode *node = NULL;
struct exfat_dentry *dentry;
- int dentry_count;
struct exfat_de_iter *de_iter;
+ int dentry_count;
+ int ret;
- de_iter = &exfat->de_iter;
- ret = exfat_de_iter_init(de_iter, exfat, dir);
+ de_iter = &fsck->de_iter;
+ ret = exfat_de_iter_init(de_iter, exfat, dir, fsck->buffer_desc);
if (ret == EOF)
return 0;
else if (ret)
ret = read_file(de_iter, &node, &dentry_count);
if (ret < 0) {
exfat_stat.error_count++;
- goto err;
+ break;
} else if (ret) {
exfat_stat.error_count++;
exfat_stat.fixed_count++;
}
- if ((node->attr & ATTR_SUBDIR) && node->size) {
- node->parent = dir;
- list_add_tail(&node->sibling, &dir->children);
- list_add_tail(&node->list, &exfat->dir_list);
- } else
- free_exfat_inode(node);
- break;
- case EXFAT_VOLUME:
- if (!read_volume_label(de_iter)) {
- exfat_err("failed to verify volume label\n");
- ret = -EINVAL;
- goto err;
- }
- break;
- case EXFAT_BITMAP:
- if (!read_bitmap(de_iter)) {
- exfat_err(
- "failed to verify allocation bitmap\n");
- ret = -EINVAL;
- goto err;
- }
- break;
- case EXFAT_UPCASE:
- if (!read_upcase_table(de_iter)) {
- exfat_err(
- "failed to verify upcase table\n");
- ret = -EINVAL;
- goto err;
+ if (node) {
+ if ((node->attr & ATTR_SUBDIR) && node->size) {
+ node->parent = dir;
+ list_add_tail(&node->sibling,
+ &dir->children);
+ list_add_tail(&node->list,
+ &exfat->dir_list);
+ } else {
+ exfat_free_inode(node);
+ }
}
break;
case EXFAT_LAST:
goto out;
+ case EXFAT_VOLUME:
+ case EXFAT_BITMAP:
+ case EXFAT_UPCASE:
+ if (dir == exfat->root)
+ break;
+ /* fallthrough */
default:
if (IS_EXFAT_DELETED(dentry->type))
break;
- exfat_err("unknown entry type. 0x%x\n", dentry->type);
- ret = -EINVAL;
- goto err;
+ if (repair_file_ask(de_iter, NULL, ER_DE_UNKNOWN,
+ "unknown entry type %#x at %07" PRIx64,
+ dentry->type,
+ exfat_de_iter_file_offset(de_iter))) {
+ struct exfat_dentry *dentry;
+
+ exfat_de_iter_get_dirty(de_iter, 0, &dentry);
+ dentry->type &= EXFAT_DELETE;
+ }
+ break;
}
exfat_de_iter_advance(de_iter, dentry_count);
exfat_de_iter_flush(de_iter);
return 0;
err:
- inode_free_children(dir, false);
+ exfat_free_children(dir, false);
INIT_LIST_HEAD(&dir->children);
exfat_de_iter_flush(de_iter);
return ret;
}
-static int write_dirty_fat(struct exfat *exfat)
+/* write bitmap segments for clusters which are marked
+ * as free, but allocated to files.
+ */
+static int write_bitmap(struct exfat_fsck *fsck)
{
- struct buffer_desc *bd;
- off_t offset;
- ssize_t len;
- size_t read_size, write_size;
- clus_t clus, last_clus, clus_count, i;
- unsigned int idx;
-
- clus = 0;
- last_clus = le32_to_cpu(exfat->bs->bsx.clu_count) + 2;
- bd = exfat->buffer_desc;
- idx = 0;
- offset = le32_to_cpu(exfat->bs->bsx.fat_offset) *
- exfat->sect_size;
- read_size = exfat->clus_size;
- write_size = exfat->sect_size;
-
- while (clus < last_clus) {
- clus_count = MIN(read_size / sizeof(clus_t), last_clus - clus);
- len = exfat_read(exfat->blk_dev->dev_fd, bd[idx].buffer,
- clus_count * sizeof(clus_t), offset);
- if (len != (ssize_t)(sizeof(clus_t) * clus_count)) {
- exfat_err("failed to read fat entries, %zd\n", len);
- return -EIO;
- }
-
- /* TODO: read ahead */
-
- for (i = clus ? clus : EXFAT_FIRST_CLUSTER;
- i < clus + clus_count; i++) {
- if (!EXFAT_BITMAP_GET(exfat->alloc_bitmap,
- i - EXFAT_FIRST_CLUSTER) &&
- ((clus_t *)bd[idx].buffer)[i - clus] !=
- EXFAT_FREE_CLUSTER) {
- ((clus_t *)bd[idx].buffer)[i - clus] =
- EXFAT_FREE_CLUSTER;
- bd[idx].dirty[(i - clus) /
- (write_size / sizeof(clus_t))] = true;
- }
- }
-
- for (i = 0; i < read_size; i += write_size) {
- if (bd[idx].dirty[i / write_size]) {
- if (exfat_write(exfat->blk_dev->dev_fd,
- &bd[idx].buffer[i], write_size,
- offset + i) !=
- (ssize_t)write_size) {
- exfat_err("failed to write "
- "fat entries\n");
- return -EIO;
-
- }
- bd[idx].dirty[i / write_size] = false;
- }
+ struct exfat *exfat = fsck->exfat;
+ bitmap_t *disk_b, *alloc_b, *ohead_b;
+ off_t dev_offset;
+ unsigned int i, bitmap_bytes, byte_offset, write_bytes;
+
+ dev_offset = exfat_c2o(exfat, exfat->disk_bitmap_clus);
+ bitmap_bytes = EXFAT_BITMAP_SIZE(le32_to_cpu(exfat->bs->bsx.clu_count));
+
+ disk_b = (bitmap_t *)exfat->disk_bitmap;
+ alloc_b = (bitmap_t *)exfat->alloc_bitmap;
+ ohead_b = (bitmap_t *)exfat->ohead_bitmap;
+
+ for (i = 0; i < bitmap_bytes / sizeof(bitmap_t); i++)
+ ohead_b[i] = alloc_b[i] | disk_b[i];
+
+ i = 0;
+ while (i < bitmap_bytes / sizeof(bitmap_t)) {
+ if (ohead_b[i] == disk_b[i]) {
+ i++;
+ continue;
}
- idx ^= 0x01;
- clus = clus + clus_count;
- offset += len;
- }
- return 0;
-}
+ byte_offset = ((i * sizeof(bitmap_t)) / 512) * 512;
+ write_bytes = MIN(512, bitmap_bytes - byte_offset);
-static int write_dirty_bitmap(struct exfat *exfat)
-{
- struct buffer_desc *bd;
- off_t offset, last_offset, bitmap_offset;
- ssize_t len;
- ssize_t read_size, write_size, i, size;
- int idx;
-
- offset = exfat_c2o(exfat, exfat->disk_bitmap_clus);
- last_offset = offset + exfat->disk_bitmap_size;
- bitmap_offset = 0;
- read_size = exfat->clus_size;
- write_size = exfat->sect_size;
-
- bd = exfat->buffer_desc;
- idx = 0;
-
- while (offset < last_offset) {
- len = MIN(read_size, last_offset - offset);
- if (exfat_read(exfat->blk_dev->dev_fd, bd[idx].buffer,
- len, offset) != (ssize_t)len)
+ if (exfat_write(exfat->blk_dev->dev_fd,
+ (char *)ohead_b + byte_offset, write_bytes,
+ dev_offset + byte_offset) != (ssize_t)write_bytes)
return -EIO;
- /* TODO: read-ahead */
-
- for (i = 0; i < len; i += write_size) {
- size = MIN(write_size, len - i);
- if (memcmp(&bd[idx].buffer[i],
- exfat->alloc_bitmap + bitmap_offset + i,
- size)) {
- if (exfat_write(exfat->blk_dev->dev_fd,
- exfat->alloc_bitmap + bitmap_offset + i,
- size, offset + i) != size)
- return -EIO;
- }
- }
-
- idx ^= 0x01;
- offset += len;
- bitmap_offset += len;
+ i = (byte_offset + write_bytes) / sizeof(bitmap_t);
}
return 0;
-}
-static int reclaim_free_clusters(struct exfat *exfat)
-{
- if (write_dirty_fat(exfat)) {
- exfat_err("failed to write fat entries\n");
- return -EIO;
- }
- if (write_dirty_bitmap(exfat)) {
- exfat_err("failed to write bitmap\n");
- return -EIO;
- }
- return 0;
}
/*
* 2. free all of file exfat_nodes.
* 3. if the directory does not have children, free its exfat_node.
*/
-static int exfat_filesystem_check(struct exfat *exfat)
+static int exfat_filesystem_check(struct exfat_fsck *fsck)
{
+ struct exfat *exfat = fsck->exfat;
struct exfat_inode *dir;
int ret = 0, dir_errors;
list_add(&exfat->root->list, &exfat->dir_list);
while (!list_empty(&exfat->dir_list)) {
- dir = list_entry(exfat->dir_list.next, struct exfat_inode, list);
+ dir = list_entry(exfat->dir_list.next,
+ struct exfat_inode, list);
if (!(dir->attr & ATTR_SUBDIR)) {
fsck_err(dir->parent, dir,
goto out;
}
- dir_errors = read_children(exfat, dir);
+ dir_errors = read_children(fsck, dir);
if (dir_errors) {
- resolve_path(&path_resolve_ctx, dir);
+ exfat_resolve_path(&path_resolve_ctx, dir);
exfat_debug("failed to check dentries: %s\n",
path_resolve_ctx.local_path);
ret = dir_errors;
}
list_del(&dir->list);
- inode_free_file_children(dir);
- inode_free_ancestors(dir);
+ exfat_free_file_children(dir);
+ exfat_free_ancestors(dir);
}
out:
exfat_free_dir_list(exfat);
- exfat->root = NULL;
- if (exfat->dirty_fat && reclaim_free_clusters(exfat))
- return -EIO;
return ret;
}
static int exfat_root_dir_check(struct exfat *exfat)
{
struct exfat_inode *root;
- clus_t clus_count;
+ clus_t clus_count = 0;
+ int err;
- root = alloc_exfat_inode(ATTR_SUBDIR);
- if (!root) {
- exfat_err("failed to allocate memory\n");
+ root = exfat_alloc_inode(ATTR_SUBDIR);
+ if (!root)
return -ENOMEM;
- }
+ exfat->root = root;
root->first_clus = le32_to_cpu(exfat->bs->bsx.root_cluster);
- if (!root_get_clus_count(exfat, root, &clus_count)) {
+ if (root_check_clus_chain(exfat, root, &clus_count)) {
exfat_err("failed to follow the cluster chain of root\n");
- free_exfat_inode(root);
+ exfat_free_inode(root);
+ exfat->root = NULL;
return -EINVAL;
}
root->size = clus_count * exfat->clus_size;
- exfat->root = root;
+ exfat_stat.dir_count++;
exfat_debug("root directory: start cluster[0x%x] size[0x%" PRIx64 "]\n",
root->first_clus, root->size);
+
+ err = exfat_read_volume_label(exfat);
+ if (err && err != EOF)
+ exfat_err("failed to read volume label\n");
+ err = 0;
+
+ err = read_bitmap(exfat);
+ if (err) {
+ exfat_err("failed to read bitmap\n");
+ return -EINVAL;
+ }
+
+ err = read_upcase_table(exfat);
+ if (err) {
+ exfat_err("failed to read upcase table\n");
+ return -EINVAL;
+ }
+
+ root->dev_offset = 0;
+ err = exfat_build_file_dentry_set(exfat, " ", ATTR_SUBDIR,
+ &root->dentry_set, &root->dentry_count);
+ if (err) {
+ exfat_free_inode(root);
+ return -ENOMEM;
+ }
return 0;
}
+static int read_lostfound(struct exfat *exfat, struct exfat_inode **lostfound)
+{
+ struct exfat_lookup_filter filter;
+ struct exfat_inode *inode;
+ int err;
+
+ err = exfat_lookup_file(exfat, exfat->root, "LOST+FOUND", &filter);
+ if (err)
+ return err;
+
+ inode = exfat_alloc_inode(ATTR_SUBDIR);
+ if (!inode) {
+ free(filter.out.dentry_set);
+ return -ENOMEM;
+ }
+
+ inode->dentry_set = filter.out.dentry_set;
+ inode->dentry_count = filter.out.dentry_count;
+ inode->dev_offset = filter.out.dev_offset;
+
+ inode->first_clus =
+ le32_to_cpu(filter.out.dentry_set[1].dentry.stream.start_clu);
+ inode->size =
+ le64_to_cpu(filter.out.dentry_set[1].dentry.stream.size);
+
+ *lostfound = inode;
+ return 0;
+}
+
+/* Create temporary files under LOST+FOUND and assign orphan
+ * chains of clusters to these files.
+ */
+static int rescue_orphan_clusters(struct exfat_fsck *fsck)
+{
+ struct exfat *exfat = fsck->exfat;
+ struct exfat_inode *lostfound;
+ bitmap_t *disk_b, *alloc_b, *ohead_b;
+ struct exfat_dentry *dset;
+ clus_t clu_count, clu, s_clu, e_clu;
+ int err, dcount;
+ unsigned int i;
+ char name[] = "FILE0000000.CHK";
+ struct exfat_dentry_loc loc;
+ struct exfat_lookup_filter lf = {
+ .in.type = EXFAT_INVAL,
+ .in.filter = NULL,
+ };
+
+ err = read_lostfound(exfat, &lostfound);
+ if (err) {
+ exfat_err("failed to find LOST+FOUND\n");
+ return err;
+ }
+
+ /* get the last empty region of LOST+FOUND */
+ err = exfat_lookup_dentry_set(exfat, lostfound, &lf);
+ if (err && err != EOF) {
+ exfat_err("failed to find the last empty slot in LOST+FOUND\n");
+ goto out;
+ }
+
+ loc.parent = lostfound;
+ loc.file_offset = lf.out.file_offset;
+ loc.dev_offset = lf.out.dev_offset;
+
+ /* build a template dentry set */
+ err = exfat_build_file_dentry_set(exfat, name, 0, &dset, &dcount);
+ if (err) {
+ exfat_err("failed to create a temporary file in LOST+FOUNDn");
+ goto out;
+ }
+ dset[1].dentry.stream.flags |= EXFAT_SF_CONTIGUOUS;
+
+ clu_count = le32_to_cpu(exfat->bs->bsx.clu_count);
+
+ /* find clusters which are not marked as free, but not allocated to
+ * any files.
+ */
+ disk_b = (bitmap_t *)exfat->disk_bitmap;
+ alloc_b = (bitmap_t *)exfat->alloc_bitmap;
+ ohead_b = (bitmap_t *)exfat->ohead_bitmap;
+ for (i = 0; i < EXFAT_BITMAP_SIZE(clu_count) / sizeof(bitmap_t); i++)
+ ohead_b[i] = disk_b[i] & ~alloc_b[i];
+
+ /* create temporary files and allocate contiguous orphan clusters
+ * to each file.
+ */
+ for (clu = EXFAT_FIRST_CLUSTER; clu < clu_count + EXFAT_FIRST_CLUSTER &&
+ exfat_bitmap_find_one(exfat, exfat->ohead_bitmap, clu, &s_clu) == 0;) {
+ if (exfat_bitmap_find_zero(exfat, exfat->ohead_bitmap, s_clu, &e_clu))
+ e_clu = clu_count + EXFAT_FIRST_CLUSTER;
+ clu = e_clu;
+
+ snprintf(name, sizeof(name), "FILE%07d.CHK",
+ (unsigned int)(loc.file_offset >> 5));
+ err = exfat_update_file_dentry_set(exfat, dset, dcount,
+ name, s_clu, e_clu - s_clu);
+ if (err)
+ continue;
+ err = exfat_add_dentry_set(exfat, &loc, dset, dcount, true);
+ if (err)
+ continue;
+ }
+
+ free(dset);
+ err = 0;
+out:
+ exfat_free_inode(lostfound);
+ return err;
+}
+
static char *bytes_to_human_readable(size_t bytes)
{
static const char * const units[] = {"B", "KB", "MB", "GB", "TB", "PB"};
static char buf[15*4];
unsigned int i, shift, quoti, remain;
+ i = sizeof(units) / sizeof(units[0]) - 1;
- shift = 0;
- for (i = 0; i < sizeof(units)/sizeof(units[0]); i++) {
- if (bytes / (1ULL << (shift + 10)) == 0)
- break;
- shift += 10;
- }
-
- if (i >= sizeof(units)/sizeof(units[0])) {
- i = i - 1;
- shift = shift - 10;
- }
+ while (i && (bytes >> i * 10) == 0)
+ i--;
+ shift = i * 10;
quoti = (unsigned int)(bytes / (1ULL << shift));
remain = 0;
if (shift > 0) {
return buf;
}
-static void exfat_show_info(struct exfat *exfat, const char *dev_name,
- int errors)
+static void exfat_show_info(struct exfat_fsck *fsck, const char *dev_name)
{
+ struct exfat *exfat = fsck->exfat;
+ bool clean;
+
exfat_info("sector size: %s\n",
bytes_to_human_readable(1 << exfat->bs->bsx.sect_size_bits));
exfat_info("cluster size: %s\n",
exfat_info("volume size: %s\n",
bytes_to_human_readable(exfat->blk_dev->size));
+ clean = exfat_stat.error_count == 0 ||
+ exfat_stat.error_count == exfat_stat.fixed_count;
printf("%s: %s. directories %ld, files %ld\n", dev_name,
- errors ? "checking stopped" : "clean",
+ clean ? "clean" : "corrupted",
exfat_stat.dir_count, exfat_stat.file_count);
- if (errors || exfat->dirty)
+ if (exfat_stat.error_count)
printf("%s: files corrupted %ld, files fixed %ld\n", dev_name,
- exfat_stat.error_count, exfat_stat.fixed_count);
+ exfat_stat.error_count - exfat_stat.fixed_count,
+ exfat_stat.fixed_count);
}
int main(int argc, char * const argv[])
{
struct fsck_user_input ui;
struct exfat_blk_dev bd;
- struct exfat *exfat = NULL;
struct pbr *bs = NULL;
int c, ret, exit_code;
bool version_only = false;
exfat_err("failed to init locale/codeset\n");
opterr = 0;
- while ((c = getopt_long(argc, argv, "arynpVvh", opts, NULL)) != EOF) {
+ while ((c = getopt_long(argc, argv, "arynpbsVvh", opts, NULL)) != EOF) {
switch (c) {
case 'n':
if (ui.options & FSCK_OPTS_REPAIR_ALL)
usage(argv[0]);
ui.options |= FSCK_OPTS_REPAIR_AUTO;
break;
+ case 'b':
+ ui.options |= FSCK_OPTS_IGNORE_BAD_FS_NAME;
+ break;
+ case 's':
+ ui.options |= FSCK_OPTS_RESCUE_CLUS;
+ break;
case 'V':
version_only = true;
break;
if (ui.options & FSCK_OPTS_REPAIR_WRITE)
ui.ei.writeable = true;
else {
+ if (ui.options & (FSCK_OPTS_IGNORE_BAD_FS_NAME |
+ FSCK_OPTS_RESCUE_CLUS))
+ usage(argv[0]);
ui.options |= FSCK_OPTS_REPAIR_NO;
ui.ei.writeable = false;
}
+ exfat_fsck.options = ui.options;
+
snprintf(ui.ei.dev_name, sizeof(ui.ei.dev_name), "%s", argv[optind]);
ret = exfat_get_blk_dev_info(&ui.ei, &bd);
if (ret < 0) {
return FSCK_EXIT_OPERATION_ERROR;
}
- exfat = (struct exfat *)calloc(1, sizeof(*exfat));
- if (!exfat) {
- exfat_err("failed to allocate exfat\n");
- ret = -ENOMEM;
+ ret = exfat_boot_region_check(&bd, &bs,
+ ui.options & FSCK_OPTS_IGNORE_BAD_FS_NAME ?
+ true : false);
+ if (ret)
goto err;
- }
- exfat->blk_dev = &bd;
- exfat->options = ui.options;
- ret = exfat_boot_region_check(exfat, &bs);
- if (ret)
+ exfat_fsck.exfat = exfat_alloc_exfat(&bd, bs);
+ if (!exfat_fsck.exfat) {
+ ret = -ENOMEM;
goto err;
+ }
- ret = init_exfat(exfat, bs);
- if (ret) {
- exfat = NULL;
+ exfat_fsck.buffer_desc = exfat_alloc_buffer(2,
+ exfat_fsck.exfat->clus_size,
+ exfat_fsck.exfat->sect_size);
+ if (!exfat_fsck.buffer_desc) {
+ ret = -ENOMEM;
goto err;
}
- if (exfat_mark_volume_dirty(exfat, true)) {
+ if ((exfat_fsck.options & FSCK_OPTS_REPAIR_WRITE) &&
+ exfat_mark_volume_dirty(exfat_fsck.exfat, true)) {
ret = -EIO;
goto err;
}
exfat_debug("verifying root directory...\n");
- ret = exfat_root_dir_check(exfat);
+ ret = exfat_root_dir_check(exfat_fsck.exfat);
if (ret) {
exfat_err("failed to verify root directory.\n");
goto out;
}
+ if (exfat_fsck.options & FSCK_OPTS_RESCUE_CLUS) {
+ ret = exfat_create_file(exfat_fsck.exfat,
+ exfat_fsck.exfat->root,
+ "LOST+FOUND",
+ ATTR_SUBDIR);
+ if (ret) {
+ exfat_err("failed to create lost+found directory\n");
+ goto out;
+ }
+
+ if (fsync(exfat_fsck.exfat->blk_dev->dev_fd) != 0) {
+ ret = -EIO;
+ exfat_err("failed to sync()\n");
+ goto out;
+ }
+ }
+
exfat_debug("verifying directory entries...\n");
- ret = exfat_filesystem_check(exfat);
+ ret = exfat_filesystem_check(&exfat_fsck);
if (ret)
goto out;
+ if (exfat_fsck.options & FSCK_OPTS_RESCUE_CLUS) {
+ rescue_orphan_clusters(&exfat_fsck);
+ exfat_fsck.dirty = true;
+ exfat_fsck.dirty_fat = true;
+ }
+
+ if (exfat_fsck.options & FSCK_OPTS_REPAIR_WRITE) {
+ ret = write_bitmap(&exfat_fsck);
+ if (ret) {
+ exfat_err("failed to write bitmap\n");
+ goto out;
+ }
+ }
+
if (ui.ei.writeable && fsync(bd.dev_fd)) {
exfat_err("failed to sync\n");
ret = -EIO;
goto out;
}
- exfat_mark_volume_dirty(exfat, false);
+ if (exfat_fsck.options & FSCK_OPTS_REPAIR_WRITE)
+ exfat_mark_volume_dirty(exfat_fsck.exfat, false);
out:
- exfat_show_info(exfat, ui.ei.dev_name, ret);
+ exfat_show_info(&exfat_fsck, ui.ei.dev_name);
err:
- if (ret == -EINVAL)
- exit_code = FSCK_EXIT_ERRORS_LEFT;
- else if (ret)
+ if (ret && ret != -EINVAL)
exit_code = FSCK_EXIT_OPERATION_ERROR;
- else if (exfat->dirty)
+ else if (ret == -EINVAL ||
+ exfat_stat.error_count != exfat_stat.fixed_count)
+ exit_code = FSCK_EXIT_ERRORS_LEFT;
+ else if (exfat_fsck.dirty)
exit_code = FSCK_EXIT_CORRECTED;
else
exit_code = FSCK_EXIT_NO_ERRORS;
- free_exfat(exfat);
+ if (exfat_fsck.buffer_desc)
+ exfat_free_buffer(exfat_fsck.buffer_desc, 2);
+ if (exfat_fsck.exfat)
+ exfat_free_exfat(exfat_fsck.exfat);
close(bd.dev_fd);
return exit_code;
}
#include "list.h"
-typedef __u32 clus_t;
-
-struct exfat_inode {
- struct exfat_inode *parent;
- struct list_head children;
- struct list_head sibling;
- struct list_head list;
- clus_t first_clus;
- clus_t last_lclus;
- clus_t last_pclus;
- __u16 attr;
- uint64_t size;
- bool is_contiguous;
- __le16 name[0]; /* only for directory */
-};
-
-#define EXFAT_NAME_MAX 255
-#define NAME_BUFFER_SIZE ((EXFAT_NAME_MAX+1)*2)
-
-struct buffer_desc {
- clus_t p_clus;
- unsigned int offset;
- char *buffer;
- char *dirty;
-};
-
-struct exfat_de_iter {
- struct exfat *exfat;
- struct exfat_inode *parent;
- struct buffer_desc *buffer_desc; /* cluster * 2 */
- clus_t ra_next_clus;
- unsigned int ra_begin_offset;
- unsigned int ra_partial_size;
- unsigned int read_size; /* cluster size */
- unsigned int write_size; /* sector size */
- off_t de_file_offset;
- off_t next_read_offset;
- int max_skip_dentries;
-};
-
enum fsck_ui_options {
FSCK_OPTS_REPAIR_ASK = 0x01,
FSCK_OPTS_REPAIR_YES = 0x02,
FSCK_OPTS_REPAIR_AUTO = 0x08,
FSCK_OPTS_REPAIR_WRITE = 0x0b,
FSCK_OPTS_REPAIR_ALL = 0x0f,
+ FSCK_OPTS_IGNORE_BAD_FS_NAME = 0x10,
+ FSCK_OPTS_RESCUE_CLUS = 0x20,
};
-struct exfat {
+struct exfat;
+struct exfat_inode;
+
+struct exfat_fsck {
+ struct exfat *exfat;
+ struct exfat_de_iter de_iter;
+ struct buffer_desc *buffer_desc; /* cluster * 2 */
enum fsck_ui_options options;
bool dirty:1;
bool dirty_fat:1;
- struct exfat_blk_dev *blk_dev;
- struct pbr *bs;
- char volume_label[VOLUME_LABEL_BUFFER_SIZE];
- struct exfat_inode *root;
- struct list_head dir_list;
- clus_t clus_count;
- unsigned int clus_size;
- unsigned int sect_size;
- struct exfat_de_iter de_iter;
- struct buffer_desc buffer_desc[2]; /* cluster * 2 */
- char *alloc_bitmap;
- char *disk_bitmap;
- clus_t disk_bitmap_clus;
- unsigned int disk_bitmap_size;
};
-#define EXFAT_CLUSTER_SIZE(pbr) (1 << ((pbr)->bsx.sect_size_bits + \
- (pbr)->bsx.sect_per_clus_bits))
-#define EXFAT_SECTOR_SIZE(pbr) (1 << (pbr)->bsx.sect_size_bits)
-
-/* fsck.c */
off_t exfat_c2o(struct exfat *exfat, unsigned int clus);
-int get_next_clus(struct exfat *exfat, struct exfat_inode *node,
- clus_t clus, clus_t *next);
-
-/* de_iter.c */
-int exfat_de_iter_init(struct exfat_de_iter *iter, struct exfat *exfat,
- struct exfat_inode *dir);
-int exfat_de_iter_get(struct exfat_de_iter *iter,
- int ith, struct exfat_dentry **dentry);
-int exfat_de_iter_get_dirty(struct exfat_de_iter *iter,
- int ith, struct exfat_dentry **dentry);
-int exfat_de_iter_flush(struct exfat_de_iter *iter);
-int exfat_de_iter_advance(struct exfat_de_iter *iter, int skip_dentries);
-off_t exfat_de_iter_file_offset(struct exfat_de_iter *iter);
#endif
#include <stdio.h>
#include <string.h>
#include <stdarg.h>
+#include <stdlib.h>
#include "exfat_ondisk.h"
#include "libexfat.h"
-#include "fsck.h"
#include "repair.h"
+#include "exfat_fs.h"
+#include "exfat_dir.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 */
/* 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},
- {ER_BS_BOOT_REGION, 0, ERP_FIX},
- {ER_DE_CHECKSUM, ERF_PREEN_YES, ERP_FIX},
- {ER_FILE_VALID_SIZE, ERF_PREEN_YES, ERP_FIX},
- {ER_FILE_INVALID_CLUS, ERF_DEFAULT_NO, ERP_TRUNCATE},
- {ER_FILE_FIRST_CLUS, ERF_DEFAULT_NO, ERP_TRUNCATE},
- {ER_FILE_SMALLER_SIZE, ERF_DEFAULT_NO, ERP_TRUNCATE},
- {ER_FILE_LARGER_SIZE, ERF_DEFAULT_NO, ERP_TRUNCATE},
- {ER_FILE_DUPLICATED_CLUS, ERF_DEFAULT_NO, ERP_TRUNCATE},
- {ER_FILE_ZERO_NOFAT, ERF_PREEN_YES, ERP_FIX},
+ {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_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)
return NULL;
}
-static bool ask_repair(struct exfat *exfat, struct exfat_repair_problem *pr)
+static int ask_repair(struct exfat_fsck *fsck, struct exfat_repair_problem *pr)
{
- bool repair = false;
+ int repair = 0;
char answer[8];
- if (exfat->options & FSCK_OPTS_REPAIR_NO ||
- pr->flags & ERF_DEFAULT_NO)
- repair = false;
- else if (exfat->options & FSCK_OPTS_REPAIR_YES ||
- pr->flags & ERF_DEFAULT_YES)
- repair = true;
+ 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 (exfat->options & FSCK_OPTS_REPAIR_ASK) {
+ if (fsck->options & FSCK_OPTS_REPAIR_ASK) {
do {
- printf(". %s (y/N)? ",
- prompts[pr->prompt_type]);
+ 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)) {
+ 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 true;
- else if (strcasecmp(answer, "\n") == 0
- || strcasecmp(answer, "N\n") == 0)
- return false;
+ return 1;
+ else if (strcasecmp(answer, "\n") == 0 ||
+ strcasecmp(answer, "N\n") == 0)
+ return 0;
}
} while (1);
- } else if (exfat->options & FSCK_OPTS_REPAIR_AUTO &&
- pr->flags & ERF_PREEN_YES)
- repair = true;
+ } else if (fsck->options & FSCK_OPTS_REPAIR_AUTO &&
+ pr->flags & ERF_PREEN_YES)
+ repair = 1;
}
- printf(". %s (y/N)? %c\n", prompts[pr->prompt_type],
- repair ? 'y' : 'n');
+ 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;
}
-bool exfat_repair_ask(struct exfat *exfat, er_problem_code_t prcode,
- const char *desc, ...)
+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 false;
+ return 0;
}
va_start(ap, desc);
vprintf(desc, ap);
va_end(ap);
- if (ask_repair(exfat, pr)) {
+ repair = ask_repair(fsck, pr);
+ if (repair) {
if (pr->prompt_type & ERP_TRUNCATE)
- exfat->dirty_fat = true;
- exfat->dirty = true;
- return true;
- } else
- return false;
+ fsck->dirty_fat = true;
+ fsck->dirty = true;
+ }
+ return repair;
}
#define ER_BS_CHECKSUM 0x00000001
#define ER_BS_BOOT_REGION 0x00000002
#define ER_DE_CHECKSUM 0x00001001
+#define ER_DE_UNKNOWN 0x00001002
+#define ER_DE_FILE 0x00001010
+#define ER_DE_SECONDARY_COUNT 0x00001011
+#define ER_DE_STREAM 0x00001020
+#define ER_DE_NAME 0x00001030
+#define ER_DE_NAME_HASH 0x00001031
+#define ER_DE_NAME_LEN 0x00001032
+#define ER_DE_DOT_NAME 0x00001033
#define ER_FILE_VALID_SIZE 0x00002001
#define ER_FILE_INVALID_CLUS 0x00002002
#define ER_FILE_FIRST_CLUS 0x00002003
#define ER_FILE_ZERO_NOFAT 0x00002007
typedef unsigned int er_problem_code_t;
+struct exfat_fsck;
-bool exfat_repair_ask(struct exfat *exfat, er_problem_code_t prcode,
- const char *fmt, ...);
+int exfat_repair_ask(struct exfat_fsck *fsck, er_problem_code_t prcode,
+ const char *fmt, ...);
#endif
--- /dev/null
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2021 LG Electronics.
+ *
+ * Author(s): Hyunchul Lee <hyc.lee@gmail.com>
+ */
+
+#ifndef _DIR_H_
+#define _DIR_H_
+
+struct exfat;
+struct exfat_inode;
+struct exfat_dentry_loc;
+struct buffer_desc;
+
+struct exfat_de_iter {
+ struct exfat *exfat;
+ struct exfat_inode *parent;
+ struct buffer_desc *buffer_desc; /* cluster * 2 */
+ __u32 ra_next_clus;
+ unsigned int ra_begin_offset;
+ unsigned int ra_partial_size;
+ unsigned int read_size; /* cluster size */
+ unsigned int write_size; /* sector size */
+ off_t de_file_offset;
+ off_t next_read_offset;
+ int max_skip_dentries;
+#define DOT_NAME_NUM_MAX 9999999
+ unsigned int dot_name_num;
+};
+
+struct exfat_lookup_filter {
+ struct {
+ uint8_t type;
+ /* return 0 if matched, return 1 if not matched,
+ * otherwise return errno
+ */
+ int (*filter)(struct exfat_de_iter *iter,
+ void *param, int *dentry_count);
+ void *param;
+ } in;
+ struct {
+ struct exfat_dentry *dentry_set;
+ int dentry_count;
+ off_t file_offset;
+ /* device offset where the dentry_set locates, or
+ * the empty slot locates or EOF if not found.
+ */
+ off_t dev_offset;
+ } out;
+};
+
+int exfat_de_iter_init(struct exfat_de_iter *iter, struct exfat *exfat,
+ struct exfat_inode *dir, struct buffer_desc *bd);
+int exfat_de_iter_get(struct exfat_de_iter *iter,
+ int ith, struct exfat_dentry **dentry);
+int exfat_de_iter_get_dirty(struct exfat_de_iter *iter,
+ int ith, struct exfat_dentry **dentry);
+int exfat_de_iter_flush(struct exfat_de_iter *iter);
+int exfat_de_iter_advance(struct exfat_de_iter *iter, int skip_dentries);
+off_t exfat_de_iter_device_offset(struct exfat_de_iter *iter);
+off_t exfat_de_iter_file_offset(struct exfat_de_iter *iter);
+
+int exfat_lookup_dentry_set(struct exfat *exfat, struct exfat_inode *parent,
+ struct exfat_lookup_filter *filter);
+int exfat_lookup_file(struct exfat *exfat, struct exfat_inode *parent,
+ const char *name, struct exfat_lookup_filter *filter_out);
+
+int exfat_create_file(struct exfat *exfat, struct exfat_inode *parent,
+ const char *name, unsigned short attr);
+int exfat_update_file_dentry_set(struct exfat *exfat,
+ struct exfat_dentry *dset, int dcount,
+ const char *name,
+ clus_t start_clu, clus_t ccount);
+int exfat_build_file_dentry_set(struct exfat *exfat, const char *name,
+ unsigned short attr, struct exfat_dentry **dentry_set,
+ int *dentry_count);
+int exfat_add_dentry_set(struct exfat *exfat, struct exfat_dentry_loc *loc,
+ struct exfat_dentry *dset, int dcount,
+ bool need_next_loc);
+void exfat_calc_dentry_checksum(struct exfat_dentry *dentry,
+ uint16_t *checksum, bool primary);
+uint16_t exfat_calc_name_hash(struct exfat *exfat,
+ __le16 *name, int len);
+
+#endif
--- /dev/null
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2021 LG Electronics.
+ *
+ * Author(s): Hyunchul Lee <hyc.lee@gmail.com>
+ */
+#ifndef _EXFAT_FS_H_
+#define _EXFAT_FS_H_
+
+#include "list.h"
+
+struct exfat_dentry;
+
+struct exfat_inode {
+ struct exfat_inode *parent;
+ struct list_head children;
+ struct list_head sibling;
+ struct list_head list;
+ clus_t first_clus;
+ __u16 attr;
+ uint64_t size;
+ bool is_contiguous;
+ struct exfat_dentry *dentry_set;
+ int dentry_count;
+ off_t dev_offset;
+ __le16 name[0]; /* only for directory */
+};
+
+#define EXFAT_NAME_MAX 255
+#define NAME_BUFFER_SIZE ((EXFAT_NAME_MAX + 1) * 2)
+
+struct exfat {
+ struct exfat_blk_dev *blk_dev;
+ struct pbr *bs;
+ char volume_label[VOLUME_LABEL_BUFFER_SIZE];
+ struct exfat_inode *root;
+ struct list_head dir_list;
+ clus_t clus_count;
+ unsigned int clus_size;
+ unsigned int sect_size;
+ char *disk_bitmap;
+ char *alloc_bitmap;
+ char *ohead_bitmap;
+ clus_t disk_bitmap_clus;
+ unsigned int disk_bitmap_size;
+ __u16 *upcase_table;
+ clus_t start_clu;
+ char *zero_cluster;
+};
+
+struct exfat_dentry_loc {
+ struct exfat_inode *parent;
+ off_t file_offset;
+ off_t dev_offset;
+};
+
+struct path_resolve_ctx {
+ struct exfat_inode *ancestors[255];
+ __le16 utf16_path[PATH_MAX + 2];
+ char local_path[PATH_MAX * MB_LEN_MAX + 1];
+};
+
+struct buffer_desc {
+ __u32 p_clus;
+ unsigned int offset;
+ char *buffer;
+ char *dirty;
+};
+
+struct exfat *exfat_alloc_exfat(struct exfat_blk_dev *blk_dev, struct pbr *bs);
+void exfat_free_exfat(struct exfat *exfat);
+
+struct exfat_inode *exfat_alloc_inode(__u16 attr);
+void exfat_free_inode(struct exfat_inode *node);
+
+void exfat_free_children(struct exfat_inode *dir, bool file_only);
+void exfat_free_file_children(struct exfat_inode *dir);
+void exfat_free_ancestors(struct exfat_inode *child);
+void exfat_free_dir_list(struct exfat *exfat);
+
+int exfat_resolve_path(struct path_resolve_ctx *ctx, struct exfat_inode *child);
+int exfat_resolve_path_parent(struct path_resolve_ctx *ctx,
+ struct exfat_inode *parent, struct exfat_inode *child);
+
+struct buffer_desc *exfat_alloc_buffer(int count,
+ unsigned int clu_size, unsigned int sect_size);
+void exfat_free_buffer(struct buffer_desc *bd, int count);
+#endif
#define DENTRY_SIZE_BITS 5
/* exFAT allows 8388608(256MB) directory entries */
#define MAX_EXFAT_DENTRIES 8388608
+#define MIN_FILE_DENTRIES 3
/* dentry types */
#define MSDOS_DELETED 0xE5 /* deleted mark */
__le16 access_date;
__u8 create_time_ms;
__u8 modify_time_ms;
- __u8 access_time_ms;
- __u8 reserved2[9];
+ __u8 create_tz;
+ __u8 modify_tz;
+ __u8 access_tz;
+ __u8 reserved2[7];
} __attribute__((packed)) file; /* file directory entry */
struct {
__u8 flags;
#include <wchar.h>
#include <limits.h>
+typedef __u32 clus_t;
+
#define KB (1024)
#define MB (1024*1024)
#define GB (1024UL*1024UL*1024UL)
#define VOLUME_LABEL_BUFFER_SIZE (VOLUME_LABEL_MAX_LEN*MB_LEN_MAX+1)
/* Upcase table macro */
+#define EXFAT_UPCASE_TABLE_CHARS (0x10000)
#define EXFAT_UPCASE_TABLE_SIZE (5836)
/* Flags for tune.exfat and exfatlabel */
#define EXFAT_MAX_SECTOR_SIZE 4096
+#define EXFAT_CLUSTER_SIZE(pbr) (1 << ((pbr)->bsx.sect_size_bits + \
+ (pbr)->bsx.sect_per_clus_bits))
+#define EXFAT_SECTOR_SIZE(pbr) (1 << (pbr)->bsx.sect_size_bits)
+
enum {
BOOT_SEC_IDX = 0,
EXBOOT_SEC_IDX,
unsigned int volume_serial;
};
+struct exfat;
+struct exfat_inode;
+
+#ifdef WORDS_BIGENDIAN
+typedef __u8 bitmap_t;
+#else
+typedef __u32 bitmap_t;
+#endif
+
+#define BITS_PER (sizeof(bitmap_t) * 8)
+#define BIT_MASK(__c) (1 << ((__c) % BITS_PER))
+#define BIT_ENTRY(__c) ((__c) / BITS_PER)
+
+#define EXFAT_BITMAP_SIZE(__c_count) \
+ (DIV_ROUND_UP(__c_count, BITS_PER) * sizeof(bitmap_t))
+
+static inline bool exfat_bitmap_get(char *bmap, clus_t c)
+{
+ clus_t cc = c - EXFAT_FIRST_CLUSTER;
+
+ return ((bitmap_t *)(bmap))[BIT_ENTRY(cc)] & BIT_MASK(cc);
+}
+
+static inline void exfat_bitmap_set(char *bmap, clus_t c)
+{
+ clus_t cc = c - EXFAT_FIRST_CLUSTER;
+
+ (((bitmap_t *)(bmap))[BIT_ENTRY(cc)] |= BIT_MASK(cc));
+}
+
+static inline void exfat_bitmap_clear(char *bmap, clus_t c)
+{
+ clus_t cc = c - EXFAT_FIRST_CLUSTER;
+ (((bitmap_t *)(bmap))[BIT_ENTRY(cc)] &= ~BIT_MASK(cc));
+}
+
+void exfat_bitmap_set_range(struct exfat *exfat, char *bitmap,
+ clus_t start_clus, clus_t count);
+int exfat_bitmap_find_zero(struct exfat *exfat, char *bmap,
+ clus_t start_clu, clus_t *next);
+int exfat_bitmap_find_one(struct exfat *exfat, char *bmap,
+ clus_t start_clu, clus_t *next);
+
void show_version(void);
-void exfat_set_bit(struct exfat_blk_dev *bd, char *bitmap,
- unsigned int clu);
-void exfat_clear_bit(struct exfat_blk_dev *bd, char *bitmap,
- unsigned int clu);
wchar_t exfat_bad_char(wchar_t w);
void boot_calc_checksum(unsigned char *sector, unsigned short size,
bool is_boot_sec, __le32 *checksum);
ssize_t exfat_utf16_dec(const __u16 *in_str, size_t in_len,
char *out_str, size_t out_size);
off_t exfat_get_root_entry_offset(struct exfat_blk_dev *bd);
-int exfat_show_volume_label(struct exfat_blk_dev *bd, off_t root_clu_off);
-int exfat_set_volume_label(struct exfat_blk_dev *bd,
- char *label_input, off_t root_clu_off);
+int exfat_read_volume_label(struct exfat *exfat);
+int exfat_set_volume_label(struct exfat *exfat, char *label_input);
int exfat_read_sector(struct exfat_blk_dev *bd, void *buf,
unsigned int sec_off);
int exfat_write_sector(struct exfat_blk_dev *bd, void *buf,
struct exfat_user_input *ui);
unsigned int exfat_clus_to_blk_dev_off(struct exfat_blk_dev *bd,
unsigned int clu_off, unsigned int clu);
-
+int exfat_get_next_clus(struct exfat *exfat, clus_t clus, clus_t *next);
+int exfat_get_inode_next_clus(struct exfat *exfat, struct exfat_inode *node,
+ clus_t clus, clus_t *next);
+int exfat_set_fat(struct exfat *exfat, clus_t clus, clus_t next_clus);
+off_t exfat_s2o(struct exfat *exfat, off_t sect);
+off_t exfat_c2o(struct exfat *exfat, unsigned int clus);
+int exfat_o2c(struct exfat *exfat, off_t device_offset,
+ unsigned int *clu, unsigned int *offset);
+bool exfat_heap_clus(struct exfat *exfat, clus_t clus);
+int exfat_root_clus_count(struct exfat *exfat);
+int read_boot_sect(struct exfat_blk_dev *bdev, struct pbr **bs);
/*
* Exfat Print
--- /dev/null
+diff a/include/libexfat.h b/include/libexfat.h (rejected hunks)
+@@ -35,6 +35,7 @@
+ #define VOLUME_LABEL_BUFFER_SIZE (VOLUME_LABEL_MAX_LEN*MB_LEN_MAX+1)
+
+ /* Upcase tabel macro */
++#define EXFAT_UPCASE_TABLE_CHARS (0x10000)
+ #define EXFAT_UPCASE_TABLE_SIZE (5836)
+
+ /* Flags for tune.exfat and exfatlabel */
#ifndef _VERSION_H
-#define EXFAT_PROGS_VERSION "1.1.3"
+#define EXFAT_PROGS_VERSION "1.2.0"
#endif /* !_VERSION_H */
--- /dev/null
+diff a/include/version.h b/include/version.h (rejected hunks)
+@@ -6,6 +6,6 @@
+ #ifndef _VERSION_H
+
+ #define EXFAT_PROGS_VERSION "1.1.2"
+-#define WEBOS_EXFAT_PROGS_VERSION "webos-1.1.2-8"
++#define WEBOS_EXFAT_PROGS_VERSION "webos-1.1.2-9"
+
+ #endif /* !_VERSION_H */
#include "exfat_ondisk.h"
#include "libexfat.h"
+#include "exfat_fs.h"
static void usage(void)
{
struct exfat_blk_dev bd;
struct exfat_user_input ui;
bool version_only = false;
- off_t root_clu_off;
int serial_mode = 0;
int flags = 0;
ret = exfat_set_volume_serial(&bd, &ui);
}
} else {
- /* Mode to change or display volume label */
- root_clu_off = exfat_get_root_entry_offset(&bd);
- if (root_clu_off < 0)
+ struct exfat *exfat;
+ struct pbr *bs;
+
+ ret = read_boot_sect(&bd, &bs);
+ if (ret)
+ goto close_fd_out;
+
+ exfat = exfat_alloc_exfat(&bd, bs);
+ if (!exfat) {
+ free(bs);
+ ret = -ENOMEM;
goto close_fd_out;
+ }
+ exfat->root = exfat_alloc_inode(ATTR_SUBDIR);
+ if (!exfat->root) {
+ ret = -ENOMEM;
+ goto free_exfat;
+ }
+
+ exfat->root->first_clus = le32_to_cpu(exfat->bs->bsx.root_cluster);
+ if (exfat_root_clus_count(exfat)) {
+ exfat_err("failed to follow the cluster chain of root\n");
+ exfat_free_inode(exfat->root);
+ ret = -EINVAL;
+ goto free_exfat;
+ }
+
+ /* Mode to change or display volume label */
if (flags == EXFAT_GET_VOLUME_LABEL)
- ret = exfat_show_volume_label(&bd, root_clu_off);
+ ret = exfat_read_volume_label(exfat);
else if (flags == EXFAT_SET_VOLUME_LABEL)
- ret = exfat_set_volume_label(&bd, argv[2], root_clu_off);
+ ret = exfat_set_volume_label(exfat, argv[2]);
+
+free_exfat:
+ if (exfat)
+ exfat_free_exfat(exfat);
}
close_fd_out:
srcs: [
"libexfat.c",
+ "exfat_fs.c",
+ "exfat_dir.c",
],
defaults: ["exfatprogs-defaults"],
}
AM_CFLAGS = -Wall -include $(top_builddir)/config.h -I$(top_srcdir)/include -fno-common
noinst_LIBRARIES = libexfat.a
-libexfat_a_SOURCES = libexfat.c
+libexfat_a_SOURCES = libexfat.c exfat_fs.c exfat_dir.c
am__v_AR_1 =
libexfat_a_AR = $(AR) $(ARFLAGS)
libexfat_a_LIBADD =
-am_libexfat_a_OBJECTS = libexfat.$(OBJEXT)
+am_libexfat_a_OBJECTS = libexfat.$(OBJEXT) exfat_fs.$(OBJEXT) \
+ exfat_dir.$(OBJEXT)
libexfat_a_OBJECTS = $(am_libexfat_a_OBJECTS)
AM_V_P = $(am__v_P_@AM_V@)
am__v_P_ = $(am__v_P_@AM_DEFAULT_V@)
DEFAULT_INCLUDES = -I.@am__isrc@ -I$(top_builddir)
depcomp = $(SHELL) $(top_srcdir)/build-aux/depcomp
am__maybe_remake_depfiles = depfiles
-am__depfiles_remade = ./$(DEPDIR)/libexfat.Po
+am__depfiles_remade = ./$(DEPDIR)/exfat_dir.Po ./$(DEPDIR)/exfat_fs.Po \
+ ./$(DEPDIR)/libexfat.Po
am__mv = mv -f
COMPILE = $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) \
$(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS)
top_srcdir = @top_srcdir@
AM_CFLAGS = -Wall -include $(top_builddir)/config.h -I$(top_srcdir)/include -fno-common
noinst_LIBRARIES = libexfat.a
-libexfat_a_SOURCES = libexfat.c
+libexfat_a_SOURCES = libexfat.c exfat_fs.c exfat_dir.c
all: all-am
.SUFFIXES:
distclean-compile:
-rm -f *.tab.c
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/exfat_dir.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/exfat_fs.Po@am__quote@ # am--include-marker
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libexfat.Po@am__quote@ # am--include-marker
$(am__depfiles_remade):
mostlyclean-am
distclean: distclean-am
- -rm -f ./$(DEPDIR)/libexfat.Po
+ -rm -f ./$(DEPDIR)/exfat_dir.Po
+ -rm -f ./$(DEPDIR)/exfat_fs.Po
+ -rm -f ./$(DEPDIR)/libexfat.Po
-rm -f Makefile
distclean-am: clean-am distclean-compile distclean-generic \
distclean-tags
installcheck-am:
maintainer-clean: maintainer-clean-am
- -rm -f ./$(DEPDIR)/libexfat.Po
+ -rm -f ./$(DEPDIR)/exfat_dir.Po
+ -rm -f ./$(DEPDIR)/exfat_fs.Po
+ -rm -f ./$(DEPDIR)/libexfat.Po
-rm -f Makefile
maintainer-clean-am: distclean-am maintainer-clean-generic
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2021 LG Electronics.
+ *
+ * Author(s): Hyunchul Lee <hyc.lee@gmail.com>
+ */
+#include <stdlib.h>
+#include <stdio.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <string.h>
+#include <time.h>
+
+#include "exfat_ondisk.h"
+#include "libexfat.h"
+#include "exfat_fs.h"
+#include "exfat_dir.h"
+
+static struct path_resolve_ctx path_resolve_ctx;
+
+#define fsck_err(parent, inode, fmt, ...) \
+({ \
+ exfat_resolve_path_parent(&path_resolve_ctx, \
+ parent, inode); \
+ exfat_err("ERROR: %s: " fmt, \
+ path_resolve_ctx.local_path, \
+ ##__VA_ARGS__); \
+})
+
+static ssize_t write_block(struct exfat_de_iter *iter, unsigned int block)
+{
+ off_t device_offset;
+ struct exfat *exfat = iter->exfat;
+ struct buffer_desc *desc;
+ unsigned int i;
+
+ desc = &iter->buffer_desc[block & 0x01];
+ device_offset = exfat_c2o(exfat, desc->p_clus) + desc->offset;
+
+ for (i = 0; i < iter->read_size / iter->write_size; i++) {
+ if (desc->dirty[i]) {
+ if (exfat_write(exfat->blk_dev->dev_fd,
+ desc->buffer + i * iter->write_size,
+ iter->write_size,
+ device_offset + i * iter->write_size)
+ != (ssize_t)iter->write_size)
+ return -EIO;
+ desc->dirty[i] = 0;
+ }
+ }
+ return 0;
+}
+
+static int read_ahead_first_blocks(struct exfat_de_iter *iter)
+{
+#ifdef POSIX_FADV_WILLNEED
+ struct exfat *exfat = iter->exfat;
+ clus_t clus_count;
+ unsigned int size;
+
+ clus_count = iter->parent->size / exfat->clus_size;
+
+ if (clus_count > 1) {
+ iter->ra_begin_offset = 0;
+ iter->ra_next_clus = 1;
+ size = exfat->clus_size;
+ } else {
+ iter->ra_begin_offset = 0;
+ iter->ra_next_clus = 0;
+ size = iter->ra_partial_size;
+ }
+ return posix_fadvise(exfat->blk_dev->dev_fd,
+ exfat_c2o(exfat, iter->parent->first_clus), size,
+ POSIX_FADV_WILLNEED);
+#else
+ return -ENOTSUP;
+#endif
+}
+
+/**
+ * read the next fragment in advance, and assume the fragment
+ * which covers @clus is already read.
+ */
+static int read_ahead_next_blocks(struct exfat_de_iter *iter,
+ clus_t clus, unsigned int offset, clus_t p_clus)
+{
+#ifdef POSIX_FADV_WILLNEED
+ struct exfat *exfat = iter->exfat;
+ off_t device_offset;
+ clus_t clus_count, ra_clus, ra_p_clus;
+ unsigned int size;
+ int ret = 0;
+
+ clus_count = iter->parent->size / exfat->clus_size;
+ if (clus + 1 < clus_count) {
+ ra_clus = clus + 1;
+ if (ra_clus == iter->ra_next_clus &&
+ offset >= iter->ra_begin_offset) {
+ ret = exfat_get_inode_next_clus(exfat, iter->parent,
+ p_clus, &ra_p_clus);
+ if (ret)
+ return ret;
+
+ if (ra_p_clus == EXFAT_EOF_CLUSTER)
+ return -EIO;
+
+ device_offset = exfat_c2o(exfat, ra_p_clus);
+ size = ra_clus + 1 < clus_count ?
+ exfat->clus_size : iter->ra_partial_size;
+ ret = posix_fadvise(exfat->blk_dev->dev_fd,
+ device_offset, size,
+ POSIX_FADV_WILLNEED);
+ iter->ra_next_clus = ra_clus + 1;
+ iter->ra_begin_offset = 0;
+ }
+ } else {
+ if (offset >= iter->ra_begin_offset &&
+ offset + iter->ra_partial_size <=
+ exfat->clus_size) {
+ device_offset = exfat_c2o(exfat, p_clus) +
+ offset + iter->ra_partial_size;
+ ret = posix_fadvise(exfat->blk_dev->dev_fd,
+ device_offset, iter->ra_partial_size,
+ POSIX_FADV_WILLNEED);
+ iter->ra_begin_offset =
+ offset + iter->ra_partial_size;
+ }
+ }
+
+ return ret;
+#else
+ return -ENOTSUP;
+#endif
+}
+
+static int read_ahead_next_dir_blocks(struct exfat_de_iter *iter)
+{
+#ifdef POSIX_FADV_WILLNEED
+ struct exfat *exfat = iter->exfat;
+ struct list_head *current;
+ struct exfat_inode *next_inode;
+ off_t offset;
+
+ if (list_empty(&exfat->dir_list))
+ return -EINVAL;
+
+ current = exfat->dir_list.next;
+ if (iter->parent == list_entry(current, struct exfat_inode, list) &&
+ current->next != &exfat->dir_list) {
+ next_inode = list_entry(current->next, struct exfat_inode,
+ list);
+ offset = exfat_c2o(exfat, next_inode->first_clus);
+ return posix_fadvise(exfat->blk_dev->dev_fd, offset,
+ iter->ra_partial_size,
+ POSIX_FADV_WILLNEED);
+ }
+
+ return 0;
+#else
+ return -ENOTSUP;
+#endif
+}
+
+static ssize_t read_block(struct exfat_de_iter *iter, unsigned int block)
+{
+ struct exfat *exfat = iter->exfat;
+ struct buffer_desc *desc, *prev_desc;
+ off_t device_offset;
+ ssize_t ret;
+
+ desc = &iter->buffer_desc[block & 0x01];
+ if (block == 0) {
+ desc->p_clus = iter->parent->first_clus;
+ desc->offset = 0;
+ }
+
+ /* if the buffer already contains dirty dentries, write it */
+ if (write_block(iter, block))
+ return -EIO;
+
+ if (block > 0) {
+ if (block > iter->parent->size / iter->read_size)
+ return EOF;
+
+ prev_desc = &iter->buffer_desc[(block-1) & 0x01];
+ if (prev_desc->offset + 2 * iter->read_size <=
+ exfat->clus_size) {
+ desc->p_clus = prev_desc->p_clus;
+ desc->offset = prev_desc->offset + iter->read_size;
+ } else {
+ ret = exfat_get_inode_next_clus(exfat, iter->parent,
+ prev_desc->p_clus, &desc->p_clus);
+ desc->offset = 0;
+ if (ret)
+ return ret;
+ else if (desc->p_clus == EXFAT_EOF_CLUSTER)
+ return EOF;
+ }
+ }
+
+ device_offset = exfat_c2o(exfat, desc->p_clus) + desc->offset;
+ ret = exfat_read(exfat->blk_dev->dev_fd, desc->buffer,
+ iter->read_size, device_offset);
+ if (ret <= 0)
+ return ret;
+
+ /*
+ * if a buffer is filled with dentries, read blocks ahead of time,
+ * otherwise read blocks of the next directory in advance.
+ */
+ if (desc->buffer[iter->read_size - 32] != EXFAT_LAST)
+ read_ahead_next_blocks(iter,
+ (block * iter->read_size) / exfat->clus_size,
+ (block * iter->read_size) % exfat->clus_size,
+ desc->p_clus);
+ else
+ read_ahead_next_dir_blocks(iter);
+ return ret;
+}
+
+int exfat_de_iter_init(struct exfat_de_iter *iter, struct exfat *exfat,
+ struct exfat_inode *dir, struct buffer_desc *bd)
+{
+ iter->exfat = exfat;
+ iter->parent = dir;
+ iter->write_size = exfat->sect_size;
+ iter->read_size = exfat->clus_size <= 4*KB ? exfat->clus_size : 4*KB;
+ if (exfat->clus_size <= 32 * KB)
+ iter->ra_partial_size = MAX(4 * KB, exfat->clus_size / 2);
+ else
+ iter->ra_partial_size = exfat->clus_size / 4;
+ iter->ra_partial_size = MIN(iter->ra_partial_size, 8 * KB);
+
+ iter->buffer_desc = bd;
+
+ iter->de_file_offset = 0;
+ iter->next_read_offset = iter->read_size;
+ iter->max_skip_dentries = 0;
+ iter->dot_name_num = 0;
+
+ if (iter->parent->size == 0)
+ return EOF;
+
+ read_ahead_first_blocks(iter);
+ if (read_block(iter, 0) != (ssize_t)iter->read_size) {
+ exfat_err("failed to read directory entries.\n");
+ return -EIO;
+ }
+
+ return 0;
+}
+
+int exfat_de_iter_get(struct exfat_de_iter *iter,
+ int ith, struct exfat_dentry **dentry)
+{
+ off_t next_de_file_offset;
+ ssize_t ret;
+ unsigned int block;
+
+ next_de_file_offset = iter->de_file_offset +
+ ith * sizeof(struct exfat_dentry);
+ block = (unsigned int)(next_de_file_offset / iter->read_size);
+
+ if (next_de_file_offset + sizeof(struct exfat_dentry) >
+ iter->parent->size)
+ return EOF;
+ /* the dentry must be in current, or next block which will be read */
+ if (block > iter->de_file_offset / iter->read_size + 1)
+ return -ERANGE;
+
+ /* read next cluster if needed */
+ if (next_de_file_offset >= iter->next_read_offset) {
+ ret = read_block(iter, block);
+ if (ret != (ssize_t)iter->read_size)
+ return ret;
+ iter->next_read_offset += iter->read_size;
+ }
+
+ if (ith + 1 > iter->max_skip_dentries)
+ iter->max_skip_dentries = ith + 1;
+
+ *dentry = (struct exfat_dentry *)
+ (iter->buffer_desc[block & 0x01].buffer +
+ next_de_file_offset % iter->read_size);
+ return 0;
+}
+
+int exfat_de_iter_get_dirty(struct exfat_de_iter *iter,
+ int ith, struct exfat_dentry **dentry)
+{
+ off_t next_file_offset;
+ unsigned int block;
+ int ret, sect_idx;
+
+ ret = exfat_de_iter_get(iter, ith, dentry);
+ if (!ret) {
+ next_file_offset = iter->de_file_offset +
+ ith * sizeof(struct exfat_dentry);
+ block = (unsigned int)(next_file_offset / iter->read_size);
+ sect_idx = (int)((next_file_offset % iter->read_size) /
+ iter->write_size);
+ iter->buffer_desc[block & 0x01].dirty[sect_idx] = 1;
+ }
+
+ return ret;
+}
+
+int exfat_de_iter_flush(struct exfat_de_iter *iter)
+{
+ if (write_block(iter, 0) || write_block(iter, 1))
+ return -EIO;
+ return 0;
+}
+
+int exfat_de_iter_advance(struct exfat_de_iter *iter, int skip_dentries)
+{
+ if (skip_dentries > iter->max_skip_dentries)
+ return -EINVAL;
+
+ iter->max_skip_dentries = 0;
+ iter->de_file_offset = iter->de_file_offset +
+ skip_dentries * sizeof(struct exfat_dentry);
+ return 0;
+}
+
+off_t exfat_de_iter_device_offset(struct exfat_de_iter *iter)
+{
+ struct buffer_desc *bd;
+ unsigned int block;
+
+ if ((uint64_t)iter->de_file_offset >= iter->parent->size)
+ return EOF;
+
+ block = iter->de_file_offset / iter->read_size;
+ bd = &iter->buffer_desc[block & 0x01];
+ return exfat_c2o(iter->exfat, bd->p_clus) + bd->offset +
+ iter->de_file_offset % iter->read_size;
+}
+
+off_t exfat_de_iter_file_offset(struct exfat_de_iter *iter)
+{
+ return iter->de_file_offset;
+}
+
+/*
+ * try to find the dentry set matched with @filter. this function
+ * doesn't verify the dentry set.
+ *
+ * if found, return 0. if not found, return EOF. otherwise return errno.
+ */
+int exfat_lookup_dentry_set(struct exfat *exfat, struct exfat_inode *parent,
+ struct exfat_lookup_filter *filter)
+{
+ struct buffer_desc *bd = NULL;
+ struct exfat_dentry *dentry = NULL;
+ off_t free_file_offset = 0, free_dev_offset = 0;
+ struct exfat_de_iter de_iter;
+ int dentry_count;
+ int retval;
+ bool last_is_free = false;
+
+ bd = exfat_alloc_buffer(2, exfat->clus_size, exfat->sect_size);
+ if (!bd)
+ return -ENOMEM;
+
+ retval = exfat_de_iter_init(&de_iter, exfat, parent, bd);
+ if (retval == EOF || retval)
+ goto out;
+
+ filter->out.dentry_set = NULL;
+ while (1) {
+ retval = exfat_de_iter_get(&de_iter, 0, &dentry);
+ if (retval == EOF) {
+ break;
+ } else if (retval) {
+ fsck_err(parent->parent, parent,
+ "failed to get a dentry. %d\n", retval);
+ goto out;
+ }
+
+ dentry_count = 1;
+ if (dentry->type == filter->in.type) {
+ retval = 0;
+ if (filter->in.filter)
+ retval = filter->in.filter(&de_iter,
+ filter->in.param,
+ &dentry_count);
+
+ if (retval == 0) {
+ struct exfat_dentry *d;
+ int i;
+
+ filter->out.dentry_set = calloc(dentry_count,
+ sizeof(struct exfat_dentry));
+ if (!filter->out.dentry_set) {
+ retval = -ENOMEM;
+ goto out;
+ }
+ for (i = 0; i < dentry_count; i++) {
+ exfat_de_iter_get(&de_iter, i, &d);
+ memcpy(filter->out.dentry_set + i, d,
+ sizeof(struct exfat_dentry));
+ }
+ filter->out.dentry_count = dentry_count;
+ goto out;
+ } else if (retval < 0) {
+ goto out;
+ }
+ last_is_free = false;
+ } else if ((dentry->type == EXFAT_LAST ||
+ IS_EXFAT_DELETED(dentry->type))) {
+ if (!last_is_free) {
+ free_file_offset =
+ exfat_de_iter_file_offset(&de_iter);
+ free_dev_offset =
+ exfat_de_iter_device_offset(&de_iter);
+ last_is_free = true;
+ }
+ } else {
+ last_is_free = false;
+ }
+
+ exfat_de_iter_advance(&de_iter, dentry_count);
+ }
+
+out:
+ if (retval == 0) {
+ filter->out.file_offset =
+ exfat_de_iter_file_offset(&de_iter);
+ filter->out.dev_offset =
+ exfat_de_iter_device_offset(&de_iter);
+ } else if (retval == EOF && last_is_free) {
+ filter->out.file_offset = free_file_offset;
+ filter->out.dev_offset = free_dev_offset;
+ } else {
+ filter->out.file_offset = exfat_de_iter_file_offset(&de_iter);
+ filter->out.dev_offset = EOF;
+ }
+ if (bd)
+ exfat_free_buffer(bd, 2);
+ return retval;
+}
+
+static int filter_lookup_file(struct exfat_de_iter *de_iter,
+ void *param, int *dentry_count)
+{
+ struct exfat_dentry *file_de, *stream_de, *name_de;
+ __le16 *name;
+ int retval, name_len;
+ int i;
+
+ retval = exfat_de_iter_get(de_iter, 0, &file_de);
+ if (retval || file_de->type != EXFAT_FILE)
+ return 1;
+
+ retval = exfat_de_iter_get(de_iter, 1, &stream_de);
+ if (retval || stream_de->type != EXFAT_STREAM)
+ return 1;
+
+ name = (__le16 *)param;
+ name_len = (int)exfat_utf16_len(name, PATH_MAX);
+
+ if (file_de->dentry.file.num_ext <
+ 1 + (name_len + ENTRY_NAME_MAX - 1) / ENTRY_NAME_MAX)
+ return 1;
+
+ for (i = 2; i <= file_de->dentry.file.num_ext && name_len > 0; i++) {
+ int len;
+
+ retval = exfat_de_iter_get(de_iter, i, &name_de);
+ if (retval || name_de->type != EXFAT_NAME)
+ return 1;
+
+ len = MIN(name_len, ENTRY_NAME_MAX);
+ if (memcmp(name_de->dentry.name.unicode_0_14,
+ name, len * 2) != 0)
+ return 1;
+
+ name += len;
+ name_len -= len;
+ }
+
+ *dentry_count = i;
+ return 0;
+}
+
+int exfat_lookup_file(struct exfat *exfat, struct exfat_inode *parent,
+ const char *name, struct exfat_lookup_filter *filter_out)
+{
+ int retval;
+ __le16 utf16_name[PATH_MAX + 2] = {0, };
+
+ retval = (int)exfat_utf16_enc(name, utf16_name, sizeof(utf16_name));
+ if (retval < 0)
+ return retval;
+
+ filter_out->in.type = EXFAT_FILE;
+ filter_out->in.filter = filter_lookup_file;
+ filter_out->in.param = utf16_name;
+
+ retval = exfat_lookup_dentry_set(exfat, parent, filter_out);
+ if (retval < 0)
+ return retval;
+
+ return 0;
+}
+
+void exfat_calc_dentry_checksum(struct exfat_dentry *dentry,
+ uint16_t *checksum, bool primary)
+{
+ unsigned int i;
+ uint8_t *bytes;
+
+ bytes = (uint8_t *)dentry;
+
+ *checksum = ((*checksum << 15) | (*checksum >> 1)) + bytes[0];
+ *checksum = ((*checksum << 15) | (*checksum >> 1)) + bytes[1];
+
+ i = primary ? 4 : 2;
+ for (; i < sizeof(*dentry); i++)
+ *checksum = ((*checksum << 15) | (*checksum >> 1)) + bytes[i];
+}
+
+static uint16_t calc_dentry_set_checksum(struct exfat_dentry *dset, int dcount)
+{
+ uint16_t checksum;
+ int i;
+
+ if (dcount < MIN_FILE_DENTRIES)
+ return 0;
+
+ checksum = 0;
+ exfat_calc_dentry_checksum(&dset[0], &checksum, true);
+ for (i = 1; i < dcount; i++)
+ exfat_calc_dentry_checksum(&dset[i], &checksum, false);
+ return checksum;
+}
+
+uint16_t exfat_calc_name_hash(struct exfat *exfat,
+ __le16 *name, int len)
+{
+ int i;
+ __le16 ch;
+ uint16_t chksum = 0;
+
+ for (i = 0; i < len; i++) {
+ ch = exfat->upcase_table[le16_to_cpu(name[i])];
+ ch = cpu_to_le16(ch);
+
+ chksum = ((chksum << 15) | (chksum >> 1)) + (ch & 0xFF);
+ chksum = ((chksum << 15) | (chksum >> 1)) + (ch >> 8);
+ }
+ return chksum;
+}
+
+static void unix_time_to_exfat_time(time_t unix_time, __u8 *tz, __le16 *date,
+ __le16 *time, __u8 *time_ms)
+{
+ struct tm tm;
+ __u16 t, d;
+
+ gmtime_r(&unix_time, &tm);
+ d = ((tm.tm_year - 80) << 9) | ((tm.tm_mon + 1) << 5) | tm.tm_mday;
+ t = (tm.tm_hour << 11) | (tm.tm_min << 5) | (tm.tm_sec >> 1);
+
+ *tz = 0x80;
+ *date = cpu_to_le16(d);
+ *time = cpu_to_le16(t);
+ if (time_ms)
+ *time_ms = (tm.tm_sec & 1) * 100;
+}
+
+int exfat_build_file_dentry_set(struct exfat *exfat, const char *name,
+ unsigned short attr, struct exfat_dentry **dentry_set,
+ int *dentry_count)
+{
+ struct exfat_dentry *dset;
+ __le16 utf16_name[PATH_MAX + 2];
+ int retval;
+ int dcount, name_len, i;
+ __le16 e_date, e_time;
+ __u8 tz, e_time_ms;
+
+ memset(utf16_name, 0, sizeof(utf16_name));
+ retval = exfat_utf16_enc(name, utf16_name, sizeof(utf16_name));
+ if (retval < 0)
+ return retval;
+
+ name_len = retval / 2;
+ dcount = 2 + DIV_ROUND_UP(name_len, ENTRY_NAME_MAX);
+ dset = calloc(1, dcount * DENTRY_SIZE);
+ if (!dset)
+ return -ENOMEM;
+
+ dset[0].type = EXFAT_FILE;
+ dset[0].dentry.file.num_ext = dcount - 1;
+ dset[0].dentry.file.attr = cpu_to_le16(attr);
+
+ unix_time_to_exfat_time(time(NULL), &tz,
+ &e_date, &e_time, &e_time_ms);
+
+ dset[0].dentry.file.create_date = e_date;
+ dset[0].dentry.file.create_time = e_time;
+ dset[0].dentry.file.create_time_ms = e_time_ms;
+ dset[0].dentry.file.create_tz = tz;
+
+ dset[0].dentry.file.modify_date = e_date;
+ dset[0].dentry.file.modify_time = e_time;
+ dset[0].dentry.file.modify_time_ms = e_time_ms;
+ dset[0].dentry.file.modify_tz = tz;
+
+ dset[0].dentry.file.access_date = e_date;
+ dset[0].dentry.file.access_time = e_time;
+ dset[0].dentry.file.access_tz = tz;
+
+ dset[1].type = EXFAT_STREAM;
+ dset[1].dentry.stream.flags = 0x01;
+ dset[1].dentry.stream.name_len = (__u8)name_len;
+ dset[1].dentry.stream.name_hash =
+ cpu_to_le16(exfat_calc_name_hash(exfat, utf16_name, name_len));
+
+ for (i = 2; i < dcount; i++) {
+ dset[i].type = EXFAT_NAME;
+ memcpy(dset[i].dentry.name.unicode_0_14,
+ utf16_name + (i - 2) * ENTRY_NAME_MAX,
+ ENTRY_NAME_MAX * 2);
+ }
+
+ dset[0].dentry.file.checksum =
+ cpu_to_le16(calc_dentry_set_checksum(dset, dcount));
+
+ *dentry_set = dset;
+ *dentry_count = dcount;
+ return 0;
+}
+
+int exfat_update_file_dentry_set(struct exfat *exfat,
+ struct exfat_dentry *dset, int dcount,
+ const char *name,
+ clus_t start_clu, clus_t ccount)
+{
+ int i, name_len;
+ __le16 utf16_name[PATH_MAX + 2];
+
+ if (dset[0].type != EXFAT_FILE || dcount < MIN_FILE_DENTRIES)
+ return -EINVAL;
+
+ if (name) {
+ name_len = (int)exfat_utf16_enc(name,
+ utf16_name, sizeof(utf16_name));
+ if (name_len < 0)
+ return name_len;
+
+ name_len /= 2;
+ if (dcount != 2 + DIV_ROUND_UP(name_len, ENTRY_NAME_MAX))
+ return -EINVAL;
+
+ dset[1].dentry.stream.name_len = (__u8)name_len;
+ dset[1].dentry.stream.name_hash =
+ exfat_calc_name_hash(exfat, utf16_name, name_len);
+
+ for (i = 2; i < dcount; i++) {
+ dset[i].type = EXFAT_NAME;
+ memcpy(dset[i].dentry.name.unicode_0_14,
+ utf16_name + (i - 2) * ENTRY_NAME_MAX,
+ ENTRY_NAME_MAX * 2);
+ }
+ }
+
+ dset[1].dentry.stream.valid_size = cpu_to_le64(ccount * exfat->clus_size);
+ dset[1].dentry.stream.size = cpu_to_le64(ccount * exfat->clus_size);
+ if (start_clu)
+ dset[1].dentry.stream.start_clu = cpu_to_le32(start_clu);
+
+ dset[0].dentry.file.checksum =
+ cpu_to_le16(calc_dentry_set_checksum(dset, dcount));
+ return 0;
+}
+
+static int find_free_cluster(struct exfat *exfat,
+ clus_t start, clus_t *new_clu)
+{
+ clus_t end = le32_to_cpu(exfat->bs->bsx.clu_count) +
+ EXFAT_FIRST_CLUSTER;
+
+ if (!exfat_heap_clus(exfat, start))
+ return -EINVAL;
+
+ while (start < end) {
+ if (exfat_bitmap_find_zero(exfat, exfat->alloc_bitmap,
+ start, new_clu))
+ break;
+ if (!exfat_bitmap_get(exfat->disk_bitmap, *new_clu))
+ return 0;
+ start = *new_clu + 1;
+ }
+
+ end = start;
+ start = EXFAT_FIRST_CLUSTER;
+ while (start < end) {
+ if (exfat_bitmap_find_zero(exfat, exfat->alloc_bitmap,
+ start, new_clu))
+ goto out_nospc;
+ if (!exfat_bitmap_get(exfat->disk_bitmap, *new_clu))
+ return 0;
+ start = *new_clu + 1;
+ }
+
+out_nospc:
+ *new_clu = EXFAT_EOF_CLUSTER;
+ return -ENOSPC;
+}
+
+static int exfat_map_cluster(struct exfat *exfat, struct exfat_inode *inode,
+ off_t file_off, clus_t *mapped_clu)
+{
+ clus_t clu, next, count, last_count;
+
+ if (!exfat_heap_clus(exfat, inode->first_clus))
+ return -EINVAL;
+
+ clu = inode->first_clus;
+ next = EXFAT_EOF_CLUSTER;
+ count = 1;
+ if (file_off == EOF)
+ last_count = DIV_ROUND_UP(inode->size, exfat->clus_size);
+ else
+ last_count = file_off / exfat->clus_size + 1;
+
+ while (true) {
+ if (count * exfat->clus_size > inode->size)
+ return -EINVAL;
+
+ if (count == last_count) {
+ *mapped_clu = clu;
+ return 0;
+ }
+
+ if (exfat_get_inode_next_clus(exfat, inode, clu, &next))
+ return -EINVAL;
+
+ if (!exfat_heap_clus(exfat, clu))
+ return -EINVAL;
+
+ clu = next;
+ count++;
+ }
+ return -EINVAL;
+}
+
+static int exfat_write_dentry_set(struct exfat *exfat,
+ struct exfat_dentry *dset, int dcount,
+ off_t dev_off, off_t *next_dev_off)
+{
+ clus_t clus;
+ unsigned int clus_off, dent_len, first_half_len, sec_half_len;
+ off_t first_half_off, sec_half_off = 0;
+
+ if (exfat_o2c(exfat, dev_off, &clus, &clus_off))
+ return -ERANGE;
+
+ dent_len = dcount * DENTRY_SIZE;
+ first_half_len = MIN(dent_len, exfat->clus_size - clus_off);
+ sec_half_len = dent_len - first_half_len;
+
+ first_half_off = dev_off;
+ if (sec_half_len) {
+ clus_t next_clus;
+
+ if (exfat_get_next_clus(exfat, clus, &next_clus))
+ return -EIO;
+ if (!exfat_heap_clus(exfat, next_clus))
+ return -EINVAL;
+ sec_half_off = exfat_c2o(exfat, next_clus);
+ }
+
+ if (exfat_write(exfat->blk_dev->dev_fd, dset, first_half_len,
+ first_half_off) != (ssize_t)first_half_len)
+ return -EIO;
+
+ if (sec_half_len) {
+ dset = (struct exfat_dentry *)((char *)dset + first_half_len);
+ if (exfat_write(exfat->blk_dev->dev_fd, dset, sec_half_len,
+ sec_half_off) != (ssize_t)sec_half_len)
+ return -EIO;
+ }
+
+ if (next_dev_off) {
+ if (sec_half_len)
+ *next_dev_off = sec_half_off + sec_half_len;
+ else
+ *next_dev_off = first_half_off + first_half_len;
+ }
+ return 0;
+}
+
+static int exfat_alloc_cluster(struct exfat *exfat, struct exfat_inode *inode,
+ clus_t *new_clu)
+{
+ clus_t last_clu;
+ int err;
+ bool need_dset = inode != exfat->root;
+
+ if ((need_dset && !inode->dentry_set) || inode->is_contiguous)
+ return -EINVAL;
+
+ err = find_free_cluster(exfat, exfat->start_clu, new_clu);
+ if (err) {
+ exfat->start_clu = EXFAT_FIRST_CLUSTER;
+ exfat_err("failed to find an free cluster\n");
+ return -ENOSPC;
+ }
+ exfat->start_clu = *new_clu;
+
+ if (exfat_set_fat(exfat, *new_clu, EXFAT_EOF_CLUSTER))
+ return -EIO;
+
+ /* zero out the new cluster */
+ if (exfat_write(exfat->blk_dev->dev_fd, exfat->zero_cluster,
+ exfat->clus_size, exfat_c2o(exfat, *new_clu)) !=
+ (ssize_t)exfat->clus_size) {
+ exfat_err("failed to fill new cluster with zeroes\n");
+ return -EIO;
+ }
+
+ if (inode->size) {
+ err = exfat_map_cluster(exfat, inode, EOF, &last_clu);
+ if (err) {
+ exfat_err("failed to get the last cluster\n");
+ return err;
+ }
+
+ if (exfat_set_fat(exfat, last_clu, *new_clu))
+ return -EIO;
+
+ if (need_dset) {
+ err = exfat_update_file_dentry_set(exfat,
+ inode->dentry_set,
+ inode->dentry_count,
+ NULL, 0,
+ DIV_ROUND_UP(inode->size,
+ exfat->clus_size) + 1);
+ if (err)
+ return -EINVAL;
+ }
+ } else {
+ if (need_dset) {
+ err = exfat_update_file_dentry_set(exfat,
+ inode->dentry_set,
+ inode->dentry_count,
+ NULL, *new_clu, 1);
+ if (err)
+ return -EINVAL;
+ }
+ }
+
+ if (need_dset && exfat_write_dentry_set(exfat, inode->dentry_set,
+ inode->dentry_count,
+ inode->dev_offset, NULL))
+ return -EIO;
+
+ exfat_bitmap_set(exfat->alloc_bitmap, *new_clu);
+ if (inode->size == 0)
+ inode->first_clus = *new_clu;
+ inode->size += exfat->clus_size;
+ return 0;
+}
+
+int exfat_add_dentry_set(struct exfat *exfat, struct exfat_dentry_loc *loc,
+ struct exfat_dentry *dset, int dcount,
+ bool need_next_loc)
+{
+ struct exfat_inode *parent = loc->parent;
+ off_t dev_off, next_dev_off;
+
+ if (parent->is_contiguous ||
+ (uint64_t)loc->file_offset > parent->size ||
+ (unsigned int)dcount * DENTRY_SIZE > exfat->clus_size)
+ return -EINVAL;
+
+ dev_off = loc->dev_offset;
+ if ((uint64_t)loc->file_offset + dcount * DENTRY_SIZE > parent->size) {
+ clus_t new_clus;
+
+ if (exfat_alloc_cluster(exfat, parent, &new_clus))
+ return -EIO;
+ if ((uint64_t)loc->file_offset == parent->size - exfat->clus_size)
+ dev_off = exfat_c2o(exfat, new_clus);
+ }
+
+ if (exfat_write_dentry_set(exfat, dset, dcount, dev_off, &next_dev_off))
+ return -EIO;
+
+ if (need_next_loc) {
+ loc->file_offset += dcount * DENTRY_SIZE;
+ loc->dev_offset = next_dev_off;
+ }
+ return 0;
+}
+
+int exfat_create_file(struct exfat *exfat, struct exfat_inode *parent,
+ const char *name, unsigned short attr)
+{
+ struct exfat_dentry *dset;
+ int err, dcount;
+ struct exfat_lookup_filter filter;
+ struct exfat_dentry_loc loc;
+
+ err = exfat_lookup_file(exfat, parent, name, &filter);
+ if (err == 0) {
+ dset = filter.out.dentry_set;
+ dcount = filter.out.dentry_count;
+ if ((le16_to_cpu(dset->dentry.file.attr) & attr) != attr)
+ err = -EEXIST;
+ goto out;
+ }
+
+ err = exfat_build_file_dentry_set(exfat, name, attr,
+ &dset, &dcount);
+ if (err)
+ return err;
+
+ loc.parent = parent;
+ loc.file_offset = filter.out.file_offset;
+ loc.dev_offset = filter.out.dev_offset;
+ err = exfat_add_dentry_set(exfat, &loc, dset, dcount, false);
+out:
+ free(dset);
+ return err;
+}
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2021 LG Electronics.
+ *
+ * Author(s): Hyunchul Lee <hyc.lee@gmail.com>
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+
+#include "exfat_ondisk.h"
+#include "libexfat.h"
+
+#include "exfat_fs.h"
+#include "exfat_dir.h"
+
+struct exfat_inode *exfat_alloc_inode(__u16 attr)
+{
+ struct exfat_inode *node;
+ int size;
+
+ size = offsetof(struct exfat_inode, name) + NAME_BUFFER_SIZE;
+ node = (struct exfat_inode *)calloc(1, size);
+ if (!node) {
+ exfat_err("failed to allocate exfat_node\n");
+ return NULL;
+ }
+
+ node->parent = NULL;
+ INIT_LIST_HEAD(&node->children);
+ INIT_LIST_HEAD(&node->sibling);
+ INIT_LIST_HEAD(&node->list);
+
+ node->attr = attr;
+ return node;
+}
+
+void exfat_free_inode(struct exfat_inode *node)
+{
+ if (node) {
+ if (node->dentry_set)
+ free(node->dentry_set);
+ free(node);
+ }
+}
+
+void exfat_free_children(struct exfat_inode *dir, bool file_only)
+{
+ struct exfat_inode *node, *i;
+
+ list_for_each_entry_safe(node, i, &dir->children, sibling) {
+ if (file_only) {
+ if (!(node->attr & ATTR_SUBDIR)) {
+ list_del(&node->sibling);
+ exfat_free_inode(node);
+ }
+ } else {
+ list_del(&node->sibling);
+ list_del(&node->list);
+ exfat_free_inode(node);
+ }
+ }
+}
+
+void exfat_free_file_children(struct exfat_inode *dir)
+{
+ exfat_free_children(dir, true);
+}
+
+/* delete @child and all ancestors that does not have
+ * children
+ */
+void exfat_free_ancestors(struct exfat_inode *child)
+{
+ struct exfat_inode *parent;
+
+ while (child && list_empty(&child->children)) {
+ if (!child->parent || !(child->attr & ATTR_SUBDIR))
+ return;
+
+ parent = child->parent;
+ list_del(&child->sibling);
+ exfat_free_inode(child);
+
+ child = parent;
+ }
+ return;
+}
+
+void exfat_free_dir_list(struct exfat *exfat)
+{
+ struct exfat_inode *dir, *i;
+
+ list_for_each_entry_safe(dir, i, &exfat->dir_list, list) {
+ if (!dir->parent)
+ continue;
+ exfat_free_file_children(dir);
+ list_del(&dir->list);
+ exfat_free_inode(dir);
+ }
+}
+
+void exfat_free_exfat(struct exfat *exfat)
+{
+ if (exfat) {
+ if (exfat->bs)
+ free(exfat->bs);
+ if (exfat->alloc_bitmap)
+ free(exfat->alloc_bitmap);
+ if (exfat->disk_bitmap)
+ free(exfat->disk_bitmap);
+ if (exfat->ohead_bitmap)
+ free(exfat->ohead_bitmap);
+ if (exfat->upcase_table)
+ free(exfat->upcase_table);
+ if (exfat->root)
+ exfat_free_inode(exfat->root);
+ if (exfat->zero_cluster)
+ free(exfat->zero_cluster);
+ free(exfat);
+ }
+}
+
+struct exfat *exfat_alloc_exfat(struct exfat_blk_dev *blk_dev, struct pbr *bs)
+{
+ struct exfat *exfat;
+
+ exfat = (struct exfat *)calloc(1, sizeof(*exfat));
+ if (!exfat)
+ return NULL;
+
+ INIT_LIST_HEAD(&exfat->dir_list);
+ exfat->blk_dev = blk_dev;
+ exfat->bs = bs;
+ exfat->clus_count = le32_to_cpu(bs->bsx.clu_count);
+ exfat->clus_size = EXFAT_CLUSTER_SIZE(bs);
+ exfat->sect_size = EXFAT_SECTOR_SIZE(bs);
+
+ /* TODO: bitmap could be very large. */
+ exfat->alloc_bitmap = (char *)calloc(1,
+ EXFAT_BITMAP_SIZE(exfat->clus_count));
+ if (!exfat->alloc_bitmap) {
+ exfat_err("failed to allocate bitmap\n");
+ goto err;
+ }
+
+ exfat->ohead_bitmap =
+ calloc(1, EXFAT_BITMAP_SIZE(exfat->clus_count));
+ if (!exfat->ohead_bitmap) {
+ exfat_err("failed to allocate bitmap\n");
+ goto err;
+ }
+
+ exfat->disk_bitmap =
+ calloc(1, EXFAT_BITMAP_SIZE(exfat->clus_count));
+ if (!exfat->disk_bitmap) {
+ exfat_err("failed to allocate bitmap\n");
+ goto err;
+ }
+
+ exfat->zero_cluster = calloc(1, exfat->clus_size);
+ if (!exfat->zero_cluster) {
+ exfat_err("failed to allocate a zero-filled cluster buffer\n");
+ goto err;
+ }
+
+ exfat->start_clu = EXFAT_FIRST_CLUSTER;
+ return exfat;
+err:
+ exfat_free_exfat(exfat);
+ return NULL;
+}
+
+struct buffer_desc *exfat_alloc_buffer(int count,
+ unsigned int clu_size, unsigned int sect_size)
+{
+ struct buffer_desc *bd;
+ int i;
+
+ bd = (struct buffer_desc *)calloc(sizeof(*bd), count);
+ if (!bd)
+ return NULL;
+
+ for (i = 0; i < count; i++) {
+ bd[i].buffer = (char *)malloc(clu_size);
+ if (!bd[i].buffer)
+ goto err;
+ bd[i].dirty = (char *)calloc(clu_size / sect_size, 1);
+ if (!bd[i].dirty)
+ goto err;
+ }
+ return bd;
+err:
+ exfat_free_buffer(bd, count);
+ return NULL;
+}
+
+void exfat_free_buffer(struct buffer_desc *bd, int count)
+{
+ int i;
+
+ for (i = 0; i < count; i++) {
+ if (bd[i].buffer)
+ free(bd[i].buffer);
+ if (bd[i].dirty)
+ free(bd[i].dirty);
+ }
+ free(bd);
+}
+
+/*
+ * get references of ancestors that include @child until the count of
+ * ancesters is not larger than @count and the count of characters of
+ * their names is not larger than @max_char_len.
+ * return true if root is reached.
+ */
+static bool get_ancestors(struct exfat_inode *child,
+ struct exfat_inode **ancestors, int count,
+ int max_char_len,
+ int *ancestor_count)
+{
+ struct exfat_inode *dir;
+ int name_len, char_len;
+ int root_depth, depth, i;
+
+ root_depth = 0;
+ char_len = 0;
+ max_char_len += 1;
+
+ dir = child;
+ while (dir) {
+ name_len = exfat_utf16_len(dir->name, NAME_BUFFER_SIZE);
+ if (char_len + name_len > max_char_len)
+ break;
+
+ /* include '/' */
+ char_len += name_len + 1;
+ root_depth++;
+
+ dir = dir->parent;
+ }
+
+ depth = MIN(root_depth, count);
+
+ for (dir = child, i = depth - 1; i >= 0; dir = dir->parent, i--)
+ ancestors[i] = dir;
+
+ *ancestor_count = depth;
+ return !dir;
+}
+
+int exfat_resolve_path(struct path_resolve_ctx *ctx, struct exfat_inode *child)
+{
+ int depth, i;
+ int name_len;
+ __le16 *utf16_path;
+ static const __le16 utf16_slash = cpu_to_le16(0x002F);
+ static const __le16 utf16_null = cpu_to_le16(0x0000);
+ size_t in_size;
+
+ ctx->local_path[0] = '\0';
+
+ get_ancestors(child,
+ ctx->ancestors,
+ sizeof(ctx->ancestors) / sizeof(ctx->ancestors[0]),
+ PATH_MAX,
+ &depth);
+
+ utf16_path = ctx->utf16_path;
+ for (i = 0; i < depth; i++) {
+ name_len = exfat_utf16_len(ctx->ancestors[i]->name,
+ NAME_BUFFER_SIZE);
+ memcpy((char *)utf16_path, (char *)ctx->ancestors[i]->name,
+ name_len * 2);
+ utf16_path += name_len;
+ memcpy((char *)utf16_path, &utf16_slash, sizeof(utf16_slash));
+ utf16_path++;
+ }
+
+ if (depth > 1)
+ utf16_path--;
+ memcpy((char *)utf16_path, &utf16_null, sizeof(utf16_null));
+ utf16_path++;
+
+ in_size = (utf16_path - ctx->utf16_path) * sizeof(__le16);
+ return exfat_utf16_dec(ctx->utf16_path, in_size,
+ ctx->local_path, sizeof(ctx->local_path));
+}
+
+int exfat_resolve_path_parent(struct path_resolve_ctx *ctx,
+ struct exfat_inode *parent, struct exfat_inode *child)
+{
+ int ret;
+ struct exfat_inode *old;
+
+ old = child->parent;
+ child->parent = parent;
+
+ ret = exfat_resolve_path(ctx, child);
+ child->parent = old;
+ return ret;
+}
#include "exfat_ondisk.h"
#include "libexfat.h"
#include "version.h"
-
-#define BITS_PER_LONG (sizeof(long) * CHAR_BIT)
-
-#ifdef WORDS_BIGENDIAN
-#define BITOP_LE_SWIZZLE ((BITS_PER_LONG - 1) & ~0x7)
-#else
-#define BITOP_LE_SWIZZLE 0
-#endif
-
-#define BIT_MASK(nr) (1UL << ((nr) % BITS_PER_LONG))
-#define BIT_WORD(nr) ((nr) / BITS_PER_LONG)
+#include "exfat_fs.h"
+#include "exfat_dir.h"
unsigned int print_level = EXFAT_INFO;
-static inline void set_bit(int nr, void *addr)
+void exfat_bitmap_set_range(struct exfat *exfat, char *bitmap,
+ clus_t start_clus, clus_t count)
{
- unsigned long mask = BIT_MASK(nr);
- unsigned long *p = ((unsigned long *)addr) + BIT_WORD(nr);
+ clus_t clus;
- *p |= mask;
-}
-
-static inline void clear_bit(int nr, void *addr)
-{
- unsigned long mask = BIT_MASK(nr);
- unsigned long *p = ((unsigned long *)addr) + BIT_WORD(nr);
+ if (!exfat_heap_clus(exfat, start_clus) ||
+ !exfat_heap_clus(exfat, start_clus + count - 1))
+ return;
- *p &= ~mask;
+ clus = start_clus;
+ while (clus < start_clus + count) {
+ exfat_bitmap_set(bitmap, clus);
+ clus++;
+ }
}
-static inline void set_bit_le(int nr, void *addr)
+static int exfat_bitmap_find_bit(struct exfat *exfat, char *bmap,
+ clus_t start_clu, clus_t *next,
+ int bit)
{
- set_bit(nr ^ BITOP_LE_SWIZZLE, addr);
+ clus_t last_clu;
+
+ last_clu = le32_to_cpu(exfat->bs->bsx.clu_count) +
+ EXFAT_FIRST_CLUSTER;
+ while (start_clu < last_clu) {
+ if (!!exfat_bitmap_get(bmap, start_clu) == bit) {
+ *next = start_clu;
+ return 0;
+ }
+ start_clu++;
+ }
+ return 1;
}
-static inline void clear_bit_le(int nr, void *addr)
+int exfat_bitmap_find_zero(struct exfat *exfat, char *bmap,
+ clus_t start_clu, clus_t *next)
{
- clear_bit(nr ^ BITOP_LE_SWIZZLE, addr);
+ return exfat_bitmap_find_bit(exfat, bmap,
+ start_clu, next, 0);
}
-void exfat_set_bit(struct exfat_blk_dev *bd, char *bitmap,
- unsigned int clu)
+int exfat_bitmap_find_one(struct exfat *exfat, char *bmap,
+ clus_t start_clu, clus_t *next)
{
- int b;
-
- b = clu & ((bd->sector_size << 3) - 1);
-
- set_bit_le(b, bitmap);
-}
-
-void exfat_clear_bit(struct exfat_blk_dev *bd, char *bitmap,
- unsigned int clu)
-{
- int b;
-
- b = clu & ((bd->sector_size << 3) - 1);
-
- clear_bit_le(b, bitmap);
+ return exfat_bitmap_find_bit(exfat, bmap,
+ start_clu, next, 1);
}
wchar_t exfat_bad_char(wchar_t w)
return -1;
}
+ if (memcmp(bs->bpb.oem_name, "EXFAT ", 8) != 0) {
+ exfat_err("Bad fs_name in boot sector, which does not describe a valid exfat filesystem\n");
+ free(bs);
+ return -1;
+ }
+
sector_size = 1 << bs->bsx.sect_size_bits;
cluster_size = (1 << bs->bsx.sect_per_clus_bits) * sector_size;
root_clu_off = le32_to_cpu(bs->bsx.clu_offset) * sector_size +
return volume_label;
}
-int exfat_show_volume_label(struct exfat_blk_dev *bd, off_t root_clu_off)
+int exfat_read_volume_label(struct exfat *exfat)
{
- struct exfat_dentry *vol_entry;
- char *volume_label;
- int nbytes;
+ struct exfat_dentry *dentry;
+ int err;
+ __le16 disk_label[VOLUME_LABEL_MAX_LEN];
+ struct exfat_lookup_filter filter = {
+ .in.type = EXFAT_VOLUME,
+ .in.filter = NULL,
+ };
- vol_entry = malloc(sizeof(struct exfat_dentry));
- if (!vol_entry) {
- exfat_err("failed to allocate memory\n");
- return -ENOMEM;
- }
+ err = exfat_lookup_dentry_set(exfat, exfat->root, &filter);
+ if (err)
+ return err;
- nbytes = exfat_read(bd->dev_fd, vol_entry,
- sizeof(struct exfat_dentry), root_clu_off);
- if (nbytes != sizeof(struct exfat_dentry)) {
- exfat_err("volume entry read failed: %d\n", errno);
- free(vol_entry);
- return -1;
- }
+ dentry = filter.out.dentry_set;
- volume_label = exfat_conv_volume_label(vol_entry);
- if (!volume_label) {
- free(vol_entry);
- return -EINVAL;
+ if (dentry->vol_char_cnt == 0)
+ goto out;
+
+ if (dentry->vol_char_cnt > VOLUME_LABEL_MAX_LEN) {
+ exfat_err("too long label. %d\n", dentry->vol_char_cnt);
+ err = -EINVAL;
+ goto out;
}
- exfat_info("label: %s\n", volume_label);
+ memcpy(disk_label, dentry->vol_label, sizeof(disk_label));
+ if (exfat_utf16_dec(disk_label, dentry->vol_char_cnt*2,
+ exfat->volume_label, sizeof(exfat->volume_label)) < 0) {
+ exfat_err("failed to decode volume label\n");
+ err = -EINVAL;
+ goto out;
+ }
- free(volume_label);
- free(vol_entry);
- return 0;
+ exfat_info("label: %s\n", exfat->volume_label);
+out:
+ free(filter.out.dentry_set);
+ return err;
}
-int exfat_set_volume_label(struct exfat_blk_dev *bd,
- char *label_input, off_t root_clu_off)
+int exfat_set_volume_label(struct exfat *exfat, char *label_input)
{
- struct exfat_dentry vol;
- int nbytes;
+ struct exfat_dentry *pvol;
+ struct exfat_dentry_loc loc;
__u16 volume_label[VOLUME_LABEL_MAX_LEN];
- int volume_label_len;
+ int volume_label_len, dcount, err;
+
+ struct exfat_lookup_filter filter = {
+ .in.type = EXFAT_VOLUME,
+ .in.filter = NULL,
+ };
+
+ err = exfat_lookup_dentry_set(exfat, exfat->root, &filter);
+ if (!err) {
+ pvol = filter.out.dentry_set;
+ dcount = filter.out.dentry_count;
+ memset(pvol->vol_label, 0, sizeof(pvol->vol_label));
+ } else {
+ pvol = calloc(sizeof(struct exfat_dentry), 1);
+ if (!pvol)
+ return -ENOMEM;
+
+ dcount = 1;
+ pvol->type = EXFAT_VOLUME;
+ }
volume_label_len = exfat_utf16_enc(label_input,
volume_label, sizeof(volume_label));
if (volume_label_len < 0) {
exfat_err("failed to encode volume label\n");
+ free(pvol);
return -1;
}
- vol.type = EXFAT_VOLUME;
- memset(vol.vol_label, 0, sizeof(vol.vol_label));
- memcpy(vol.vol_label, volume_label, volume_label_len);
- vol.vol_char_cnt = volume_label_len/2;
-
- nbytes = exfat_write(bd->dev_fd, &vol, sizeof(struct exfat_dentry),
- root_clu_off);
- if (nbytes != sizeof(struct exfat_dentry)) {
- exfat_err("volume entry write failed: %d\n", errno);
- return -1;
- }
- fsync(bd->dev_fd);
+ memcpy(pvol->vol_label, volume_label, volume_label_len);
+ pvol->vol_char_cnt = volume_label_len/2;
+ loc.parent = exfat->root;
+ loc.file_offset = filter.out.file_offset;
+ loc.dev_offset = filter.out.dev_offset;
+ err = exfat_add_dentry_set(exfat, &loc, pvol, dcount, false);
exfat_info("new label: %s\n", label_input);
- return 0;
+
+ free(pvol);
+
+ return err;
}
int exfat_read_sector(struct exfat_blk_dev *bd, void *buf, unsigned int sec_off)
{
int ret;
- unsigned long long offset = sec_off * bd->sector_size;
+ unsigned long long offset =
+ (unsigned long long)sec_off * bd->sector_size;
ret = pread(bd->dev_fd, buf, bd->sector_size, offset);
if (ret < 0) {
unsigned int sec_off)
{
int bytes;
- unsigned long long offset = sec_off * bd->sector_size;
+ unsigned long long offset =
+ (unsigned long long)sec_off * bd->sector_size;
bytes = pwrite(bd->dev_fd, buf, bd->sector_size, offset);
if (bytes != (int)bd->sector_size) {
goto free_ppbr;
}
+ if (memcmp(ppbr->bpb.oem_name, "EXFAT ", 8) != 0) {
+ exfat_err("Bad fs_name in boot sector, which does not describe a valid exfat filesystem\n");
+ ret = -1;
+ goto free_ppbr;
+ }
+
exfat_info("volume serial : 0x%x\n", ppbr->bsx.vol_serial);
free_ppbr:
goto free_ppbr;
}
+ if (memcmp(ppbr->bpb.oem_name, "EXFAT ", 8) != 0) {
+ exfat_err("Bad fs_name in boot sector, which does not describe a valid exfat filesystem\n");
+ ret = -1;
+ goto free_ppbr;
+ }
+
bd->sector_size = 1 << ppbr->bsx.sect_size_bits;
ppbr->bsx.vol_serial = ui->volume_serial;
return clu_off_sectnr * bd->sector_size +
(clu - EXFAT_RESERVED_CLUSTERS) * bd->cluster_size;
}
+
+int exfat_get_next_clus(struct exfat *exfat, clus_t clus, clus_t *next)
+{
+ off_t offset;
+
+ *next = EXFAT_EOF_CLUSTER;
+
+ if (!exfat_heap_clus(exfat, clus))
+ return -EINVAL;
+
+ offset = (off_t)le32_to_cpu(exfat->bs->bsx.fat_offset) <<
+ exfat->bs->bsx.sect_size_bits;
+ offset += sizeof(clus_t) * clus;
+
+ if (exfat_read(exfat->blk_dev->dev_fd, next, sizeof(*next), offset)
+ != sizeof(*next))
+ return -EIO;
+ *next = le32_to_cpu(*next);
+ return 0;
+}
+
+int exfat_get_inode_next_clus(struct exfat *exfat, struct exfat_inode *node,
+ clus_t clus, clus_t *next)
+{
+ *next = EXFAT_EOF_CLUSTER;
+
+ if (node->is_contiguous) {
+ if (!exfat_heap_clus(exfat, clus))
+ return -EINVAL;
+ *next = clus + 1;
+ return 0;
+ }
+
+ return exfat_get_next_clus(exfat, clus, next);
+}
+
+int exfat_set_fat(struct exfat *exfat, clus_t clus, clus_t next_clus)
+{
+ off_t offset;
+
+ offset = le32_to_cpu(exfat->bs->bsx.fat_offset) <<
+ exfat->bs->bsx.sect_size_bits;
+ offset += sizeof(clus_t) * clus;
+
+ if (exfat_write(exfat->blk_dev->dev_fd, &next_clus, sizeof(next_clus),
+ offset) != sizeof(next_clus))
+ return -EIO;
+ return 0;
+}
+
+off_t exfat_s2o(struct exfat *exfat, off_t sect)
+{
+ return sect << exfat->bs->bsx.sect_size_bits;
+}
+
+off_t exfat_c2o(struct exfat *exfat, unsigned int clus)
+{
+ if (clus < EXFAT_FIRST_CLUSTER)
+ return ~0L;
+
+ return exfat_s2o(exfat, le32_to_cpu(exfat->bs->bsx.clu_offset) +
+ ((off_t)(clus - EXFAT_FIRST_CLUSTER) <<
+ exfat->bs->bsx.sect_per_clus_bits));
+}
+
+int exfat_o2c(struct exfat *exfat, off_t device_offset,
+ unsigned int *clu, unsigned int *offset)
+{
+ off_t heap_offset;
+
+ heap_offset = exfat_s2o(exfat, le32_to_cpu(exfat->bs->bsx.clu_offset));
+ if (device_offset < heap_offset)
+ return -ERANGE;
+
+ *clu = (unsigned int)((device_offset - heap_offset) /
+ exfat->clus_size) + EXFAT_FIRST_CLUSTER;
+ if (!exfat_heap_clus(exfat, *clu))
+ return -ERANGE;
+ *offset = (device_offset - heap_offset) % exfat->clus_size;
+ return 0;
+}
+
+bool exfat_heap_clus(struct exfat *exfat, clus_t clus)
+{
+ return clus >= EXFAT_FIRST_CLUSTER &&
+ (clus - EXFAT_FIRST_CLUSTER) < exfat->clus_count;
+}
+
+int exfat_root_clus_count(struct exfat *exfat)
+{
+ struct exfat_inode *node = exfat->root;
+ clus_t clus, next;
+ int clus_count = 0;
+
+ if (!exfat_heap_clus(exfat, node->first_clus))
+ return -EIO;
+
+ clus = node->first_clus;
+ do {
+ if (exfat_bitmap_get(exfat->alloc_bitmap, clus))
+ return -EINVAL;
+
+ exfat_bitmap_set(exfat->alloc_bitmap, clus);
+
+ if (exfat_get_inode_next_clus(exfat, node, clus, &next)) {
+ exfat_err("ERROR: failed to read the fat entry of root");
+ return -EIO;
+ }
+
+ if (next != EXFAT_EOF_CLUSTER && !exfat_heap_clus(exfat, next))
+ return -EINVAL;
+
+ clus = next;
+ clus_count++;
+ } while (clus != EXFAT_EOF_CLUSTER);
+
+ node->size = clus_count * exfat->clus_size;
+ return 0;
+}
+
+int read_boot_sect(struct exfat_blk_dev *bdev, struct pbr **bs)
+{
+ struct pbr *pbr;
+ int err = 0;
+ unsigned int sect_size, clu_size;
+
+ pbr = malloc(sizeof(struct pbr));
+
+ if (exfat_read(bdev->dev_fd, pbr, sizeof(*pbr), 0) !=
+ (ssize_t)sizeof(*pbr)) {
+ exfat_err("failed to read a boot sector\n");
+ err = -EIO;
+ goto err;
+ }
+
+ err = -EINVAL;
+ if (memcmp(pbr->bpb.oem_name, "EXFAT ", 8) != 0) {
+ exfat_err("failed to find exfat file system\n");
+ goto err;
+ }
+
+ sect_size = 1 << pbr->bsx.sect_size_bits;
+ clu_size = 1 << (pbr->bsx.sect_size_bits +
+ pbr->bsx.sect_per_clus_bits);
+
+ if (sect_size < 512 || sect_size > 4 * KB) {
+ exfat_err("too small or big sector size: %d\n",
+ sect_size);
+ goto err;
+ }
+
+ if (clu_size < sect_size || clu_size > 32 * MB) {
+ exfat_err("too small or big cluster size: %d\n",
+ clu_size);
+ goto err;
+ }
+
+ *bs = pbr;
+ return 0;
+err:
+ free(pbr);
+ return err;
+}
--- /dev/null
+.TH exfat2img 8
+.SH NAME
+exfat2img \- dump metadata of an exFAT filesystem
+.SH SYNOPSIS
+.B exfat2img
+[
+.B \-o \fIpath\fB\
+] [
+.B \-V
+]
+.I device
+.br
+.B exfat2img \-V
+.SH DESCRIPTION
+.B exfat2img
+dump metadata of exFAT filesystems for debugging. \fBexfat2img\fP dump boot sector, File Allcation Table, Bitmap and all metadata which can reach from root directory.
+
+.SH OPTIONS
+.TP
+.BI \-o\ \-\-output
+Specify output result file. If filesystem to which output file is written does not support sparse file, you should use '-' in place of \fIpath\fP.
+Because a dump image generated from stdout has a special format, when restoring a partition from it, exfat2img should be used. See Examples.
+.TP
+.B \-V
+Prints the version number and exits.
+
+.SH EXAMPLES
+.PP
+Dump metadata into a sparse file.
+.EX
+.RB "$" " exfat2img -o sda1.dump /dev/sda1
+
+Dump metadata into standard out and restore a partition
+.EX
+.RB "$" " exfat2img -o - /dev/sda1 | bzip2 > sda1.dump.bz2"
+.RB "$" " bzip2 -dc sda1.dump.bz2 | exfat2img -o /dev/sdb1 -"
.B exfatlabel
[
.B \-i
-.I volume-label
] [
-.B \-v
+.B \-V
]
.I device
[
If there is a
.I label_string
-in argument of exfatlabel, It will be written to volume label
-field on given device. If not, exfatlabel will just print out
-after reading volume label field from given device. If -i or
---volume-serial is given, It can be switched to volume serial
-mode.
+in the argument of exfatlabel, it will be written to the volume
+label field on a given device. If not, exfatlabel will just print
+it after reading the volume label field from the given device. If -i
+or --volume-serial is given, it will switch to volume serial mode.
.PP
.SH OPTIONS
.TP
-.BI \-i
+.BI \-i\ \-\-volume-serial
Switch to volume serial mode.
.TP
.B \-V
] [
.B \-y
] [
+.B \-b
+] [
.B \-v
]
.I device
.SH DESCRIPTION
.B fsck.exfat
checks an exFAT filesystem and repairs the filesystem
-depending on the options passed.
+depending on the options passed. The following corruptions can be repaired, and see the option, '-s'.
+.IP -
+Boot sector has invalid parameters. If backup boot sector is valid, replace the boot sector with it.
+.IP -
+Cluster is marked as free but belonged to a file, or vise versa. The bitmap for the cluster is marked properly.
+.IP -
+File size is abnormally large considering the count of clusters. The size is changed.
+.IP -
+File size is abnormally small considering the count of clusters. The remaining clusters are deleted.
+.IP -
+File's cluster chain has an invalid cluster number. The number are changed to EOF, and the file size is also changed.
+.IP -
+File's cluster chain contains a loop. The loop is broken.
+.IP -
+Files share the same cluster. Cluster chains for files except one are broken.
+.IP -
+Start cluster number is invalid. The cluster number and file size are changed to 0.
+.IP -
+Checksum value of direcotry entry set is invalid. Directory entry set is deleted.
+.IP -
+Bad hash value of a file name. The hash value is changed properly.
+.IP -
+Fields of directory entry set have invalid values. Directory entry set is deleted.
.PP
.SH OPTIONS
.TP
.BI \-r
Repair the filesystem interactively.
.TP
+.BI \-s
+Create files in /LOST+FOUND for orphan clusters. These files have clusters allocated but not belonged to any files when reparing the filesystem. clusters unused and contiguous in bitmap are allocated to the same file.
+.TP
.BI \-v
Prints verbose debugging information while checking the exFAT filesystem.
.TP
.TP
.B \-y
Repair the filesystem answering yes to all questions.
+.TP
+.B \-b
+Try to repair the filesystem even if the exFAT filesystem is not found.
+
+.SH EXAMPLES
+.PP
+repair a corrupted device and create files in /LOST+FOUND, which have clusters allocated but not belonged to any files when reparing the device.
+.EX
+.RB "$" " fsck.exfat -p -s /dev/sda1"
+
.SH SEE ALSO
.BR fsck (8),
.BR fstab (5),
char *bitmap;
unsigned int i, nbytes;
- bitmap = calloc(finfo.bitmap_byte_len, sizeof(*bitmap));
+ bitmap = calloc(round_up(finfo.bitmap_byte_len, sizeof(bitmap_t)),
+ sizeof(*bitmap));
if (!bitmap)
return -1;
- for (i = 0; i < finfo.used_clu_cnt - EXFAT_FIRST_CLUSTER; i++)
- exfat_set_bit(bd, bitmap, i);
+ for (i = EXFAT_FIRST_CLUSTER; i < finfo.used_clu_cnt; i++)
+ exfat_bitmap_set(bitmap, i);
nbytes = pwrite(bd->dev_fd, bitmap, finfo.bitmap_byte_len, finfo.bitmap_byte_off);
if (nbytes != finfo.bitmap_byte_len) {
static int exfat_create_root_dir(struct exfat_blk_dev *bd,
struct exfat_user_input *ui)
{
- struct exfat_dentry ed[3];
+ struct exfat_dentry ed[3] = {0};
int dentries_len = sizeof(struct exfat_dentry) * 3;
int nbytes;
#include "exfat_ondisk.h"
#include "libexfat.h"
+#include "exfat_fs.h"
static void usage(void)
{
bool version_only = false;
int flags = 0;
char label_input[VOLUME_LABEL_BUFFER_SIZE];
- off_t root_clu_off;
+ struct exfat *exfat = NULL;
+ struct pbr *bs;
init_user_input(&ui);
goto close_fd_out;
}
- root_clu_off = exfat_get_root_entry_offset(&bd);
- if (root_clu_off < 0)
+ ret = read_boot_sect(&bd, &bs);
+ if (ret)
goto close_fd_out;
+ exfat = exfat_alloc_exfat(&bd, bs);
+ if (!exfat) {
+ free(bs);
+ ret = -ENOMEM;
+ goto close_fd_out;
+ }
+
+ exfat->root = exfat_alloc_inode(ATTR_SUBDIR);
+ if (!exfat->root) {
+ ret = -ENOMEM;
+ goto close_fd_out;
+ }
+
+ exfat->root->first_clus = le32_to_cpu(exfat->bs->bsx.root_cluster);
+ if (exfat_root_clus_count(exfat)) {
+ exfat_err("failed to follow the cluster chain of root\n");
+ exfat_free_inode(exfat->root);
+ ret = -EINVAL;
+ goto close_fd_out;
+ }
+
if (flags == EXFAT_GET_VOLUME_LABEL)
- ret = exfat_show_volume_label(&bd, root_clu_off);
+ ret = exfat_read_volume_label(exfat);
else if (flags == EXFAT_SET_VOLUME_LABEL)
- ret = exfat_set_volume_label(&bd, label_input, root_clu_off);
+ ret = exfat_set_volume_label(exfat, label_input);
close_fd_out:
close(bd.dev_fd);
+ if (exfat)
+ exfat_free_exfat(exfat);
out:
return ret;
}
projects / sven / exfatprogs.git / commitdiff