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+ GNU GENERAL PUBLIC LICENSE
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+
+ END OF TERMS AND CONDITIONS
+
+ How to Apply These Terms to Your New Programs
+
+ If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+ To do so, attach the following notices to the program. It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+ <one line to give the program's name and a brief idea of what it does.>
+ Copyright (C) <year> <name of author>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+ If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+ <program> Copyright (C) <year> <name of author>
+ This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+ This is free software, and you are welcome to redistribute it
+ under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License. Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+ You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<http://www.gnu.org/licenses/>.
+
+ The GNU General Public License does not permit incorporating your program
+into proprietary programs. If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library. If this is what you want to do, use the GNU Lesser General
+Public License instead of this License. But first, please read
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.
--- /dev/null
+0.9.5 (2011-05-15)
+
+* Fixed erasing of the root directory cluster when creating a new FS with
+mkexfatfs. This bug could cause mkexfatfs to produce invalid FS.
+* Utilities are not linked with libfuse anymore.
+* Ensure that the path being opened is either a device or a regular file.
+
+0.9.4 (2011-03-05)
+
+* Introduced exfat-utils: dumpexfat, exfatfsck, mkexfatfs, exfatlabel.
+* Fixed "Invalid argument" error while mounting a volume from a disk with sector size greater than 512 bytes.
+* Wait for all data to be flushed to disk on unmount.
+* Kernel cache is no longer flushed on open. This can slightly improve read performance by avoiding extra read requests from kernel to user-space.
+* Allow to unmount volumes as user (fusermount -u) if they were mounted from the very same user [Tino Lange].
+* Errors and warnings are now duplicated to syslog.
+
+0.9.3 (2010-09-25)
+
+* Directories now can shrink.
+* Improved timestamps resolution from 2 sec to 1 sec.
+* Fixed timestamps displaying under Mac OS X when compiled for i386 or ppc.
+* Fixed FS size displaying for non-GNU systems.
+
+0.9.2 (2010-07-24)
+
+* Fixed a bug which could cause the whole directory to become unreadable after renaming a file in it.
+* Support for Solaris and various *BSD [Albert Lee].
+* Improved error handling on corrupted volumes.
+* Improved allowed file name characters filter.
+* Added man page.
+
+0.9.1 (2010-06-12)
+
+* Implemented automounting (util-linux-ng 2.18 or later is required).
+* Fixed mounting when cluster bitmap is larger than expected.
+* Fixed crash on statfs() when root directory contains error.
+* Fixed bugs specific to big-endian machines.
+* Other bugfixes.
+
+0.9.0 (2010-03-21)
+
+* Initial release.
--- /dev/null
+#
+# SConstruct (10.09.09)
+# SConscript for all components.
+#
+# Copyright (C) 2009, 2010 Andrew Nayenko
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+#
+
+import os
+import platform
+import SCons
+
+env = Environment(**ARGUMENTS)
+destdir = env.get('DESTDIR', '/sbin');
+targets = []
+
+if not env['CCFLAGS']:
+ if env['CC'] == 'gcc':
+ env['CCFLAGS'] = '-Wall -O2 -ggdb'
+env.Append(CPPDEFINES = {'FUSE_USE_VERSION': 26})
+env.Append(CPPDEFINES = {'_FILE_OFFSET_BITS' : 64})
+# __DARWIN_64_BIT_INO_T=0 define is needed because since Snow Leopard inode
+# numbers are 64-bit by default, but libfuse operates 32-bit ones. This define
+# forces 32-bit inode declaration in system headers, but it's also possible to
+# link against libfuse_ino64 instead.
+if platform.system() == 'Darwin':
+ env.Append(CPPDEFINES = {'__DARWIN_64_BIT_INO_T' : 0})
+ env.Append(CPPDEFINES = {'__DARWIN_UNIX03' : 1})
+env.Append(CPPPATH = ['libexfat'])
+env.Append(LINKFLAGS = '')
+
+def make_symlink(dir, target, link_name):
+ workdir = os.getcwd()
+ os.chdir(dir)
+ try:
+ os.remove(link_name)
+ except OSError:
+ pass
+ os.symlink(target, link_name)
+ os.chdir(workdir)
+
+symlink = SCons.Action.ActionFactory(make_symlink,
+ lambda dir, target, link_name:
+ 'make_symlink("%s", "%s", "%s")' % (dir, target, link_name))
+
+def program(pattern, output, alias = None, lib = None):
+ sources = Glob(pattern)
+ if not sources:
+ return
+ libs = ['exfat']
+ if lib:
+ libs.append(lib)
+ target = env.Program(output, sources, LIBS = libs, LIBPATH = 'libexfat')
+ if alias:
+ Alias('install', Install(destdir, target),
+ symlink(destdir, os.path.basename(output), alias))
+ else:
+ Alias('install', Install(destdir, target))
+ targets.append(target)
+
+env.Library('libexfat/exfat', Glob('libexfat/*.c'))
+
+program('fuse/*.c', 'fuse/mount.exfat-fuse', 'mount.exfat', ['fuse'])
+program('dump/*.c', 'dump/dumpexfat')
+program('fsck/*.c', 'fsck/exfatfsck', 'fsck.exfat')
+program('mkfs/*.c', 'mkfs/mkexfatfs', 'mkfs.exfat')
+program('label/*.c', 'label/exfatlabel')
+
+Default(targets)
--- /dev/null
+.\" Copyright (C) 2011 Andrew Nayenko
+.\"
+.TH DUMPEXFAT 8 "February 2011"
+.SH NAME
+.B dumpexfat
+\- dump exFAT file system
+.SH SYNOPSIS
+.B exfatlabel
+[
+.B \-s
+]
+[
+.B \-u
+]
+[
+.B \-v
+]
+.I device
+
+.SH DESCRIPTION
+.B dumpexfat
+dumps details about exFAT file system including low-level info. All sizes are
+in bytes.
+
+.SH OPTIONS
+Command line options available:
+.TP
+.B \-s
+Dump only info from super block. May be useful for heavily corrupted file
+systems.
+.TP
+.B \-u
+Dump ranges of used sectors starting from 0 and separated with spaces. May be
+useful for backup tools.
+.TP
+.BI \-v
+Print version and copyright.
+
+.SH EXIT CODES
+Zero is returned on success. Any other code means an error.
+
+.SH AUTHOR
+Andrew Nayenko
+
+.SH SEE ALSO
+.BR mkexfatfs (8)
--- /dev/null
+/*
+ main.c (08.11.10)
+ Prints detailed information about exFAT volume.
+
+ Copyright (C) 2010 Andrew Nayenko
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <fcntl.h>
+#include <unistd.h>
+#include <inttypes.h>
+#include <stdio.h>
+#include <string.h>
+#include <exfat.h>
+
+static void print_generic_info(const struct exfat_super_block* sb)
+{
+ printf("Volume serial number 0x%08x\n",
+ le32_to_cpu(sb->volume_serial));
+ printf("FS version %hhu.%hhu\n",
+ sb->version.major, sb->version.minor);
+ printf("Sector size %10u\n",
+ SECTOR_SIZE(*sb));
+ printf("Cluster size %10u\n",
+ CLUSTER_SIZE(*sb));
+}
+
+static void print_sector_info(const struct exfat_super_block* sb)
+{
+ printf("Sectors count %10"PRIu64"\n",
+ le64_to_cpu(sb->sector_count));
+}
+
+static void print_cluster_info(const struct exfat_super_block* sb)
+{
+ printf("Clusters count %10u\n",
+ le32_to_cpu(sb->cluster_count));
+}
+
+static void print_other_info(const struct exfat_super_block* sb)
+{
+ printf("First sector %10"PRIu64"\n",
+ le64_to_cpu(sb->sector_start));
+ printf("FAT first sector %10u\n",
+ le32_to_cpu(sb->fat_sector_start));
+ printf("FAT sectors count %10u\n",
+ le32_to_cpu(sb->fat_sector_count));
+ printf("First cluster sector %10u\n",
+ le32_to_cpu(sb->cluster_sector_start));
+ printf("Root directory cluster %10u\n",
+ le32_to_cpu(sb->rootdir_cluster));
+ printf("Volume state 0x%04hx\n",
+ le16_to_cpu(sb->volume_state));
+ printf("FATs count %10hhu\n",
+ sb->fat_count);
+ printf("Drive number 0x%02hhx\n",
+ sb->drive_no);
+ printf("Allocated space %9hhu%%\n",
+ sb->allocated_percent);
+}
+
+static int dump_sb(const char* spec)
+{
+ int fd;
+ struct exfat_super_block sb;
+
+ fd = exfat_open(spec, 1);
+ if (fd < 0)
+ return 1;
+
+ if (read(fd, &sb, sizeof(struct exfat_super_block))
+ != sizeof(struct exfat_super_block))
+ {
+ close(fd);
+ exfat_error("failed to read from `%s'", spec);
+ return 1;
+ }
+ if (memcmp(sb.oem_name, "EXFAT ", sizeof(sb.oem_name)) != 0)
+ {
+ close(fd);
+ exfat_error("exFAT file system is not found on `%s'", spec);
+ return 1;
+ }
+
+ print_generic_info(&sb);
+ print_sector_info(&sb);
+ print_cluster_info(&sb);
+ print_other_info(&sb);
+
+ close(fd);
+ return 0;
+}
+
+static void dump_sectors(struct exfat* ef)
+{
+ off_t a = 0, b = 0;
+
+ printf("Used sectors ");
+ while (exfat_find_used_sectors(ef, &a, &b) == 0)
+ printf(" %"PRIu64"-%"PRIu64, a, b);
+ puts("");
+}
+
+static int dump_full(const char* spec, int used_sectors)
+{
+ struct exfat ef;
+ uint32_t free_clusters;
+ uint64_t free_sectors;
+
+ if (exfat_mount(&ef, spec, "ro") != 0)
+ return 1;
+
+ free_clusters = exfat_count_free_clusters(&ef);
+ free_sectors = (uint64_t) free_clusters << ef.sb->spc_bits;
+
+ printf("Volume label %15s\n", exfat_get_label(&ef));
+ print_generic_info(ef.sb);
+ print_sector_info(ef.sb);
+ printf("Free sectors %10"PRIu64"\n", free_sectors);
+ print_cluster_info(ef.sb);
+ printf("Free clusters %10u\n", free_clusters);
+ print_other_info(ef.sb);
+ if (used_sectors)
+ dump_sectors(&ef);
+
+ exfat_unmount(&ef);
+ return 0;
+}
+
+static void usage(const char* prog)
+{
+ fprintf(stderr, "Usage: %s [-s] [-u] [-v] <device>\n", prog);
+ exit(1);
+}
+
+int main(int argc, char* argv[])
+{
+ char** pp;
+ const char* spec = NULL;
+ int sb_only = 0;
+ int used_sectors = 0;
+
+ printf("dumpexfat %u.%u.%u\n",
+ EXFAT_VERSION_MAJOR, EXFAT_VERSION_MINOR, EXFAT_VERSION_PATCH);
+
+ for (pp = argv + 1; *pp; pp++)
+ {
+ if (strcmp(*pp, "-s") == 0)
+ sb_only = 1;
+ else if (strcmp(*pp, "-u") == 0)
+ used_sectors = 1;
+ else if (strcmp(*pp, "-v") == 0)
+ {
+ puts("Copyright (C) 2010 Andrew Nayenko");
+ return 0;
+ }
+ else if (spec == NULL)
+ spec = *pp;
+ else
+ usage(argv[0]);
+ }
+ if (spec == NULL)
+ usage(argv[0]);
+
+ if (sb_only)
+ return dump_sb(spec);
+
+ return dump_full(spec, used_sectors);
+}
--- /dev/null
+.\" Copyright (C) 2011 Andrew Nayenko
+.\"
+.TH EXFATFSCK 8 "February 2011"
+.SH NAME
+.B exfatfsck
+\- check an exFAT file system
+.SH SYNOPSIS
+.B exfatfsck
+[
+.B \-v
+]
+.I device
+
+.SH DESCRIPTION
+.B exfatfsck
+checks an exFAT file system for errors. Note that it cannot repair corrupted
+FS, it just reports found errors.
+
+.SH COMMAND LINE OPTIONS
+Command line options available:
+.TP
+.BI \-v
+Print version and copyright.
+
+.SH EXIT CODES
+Zero is returned if errors were not found. Any other code means an error.
+
+.SH AUTHOR
+Andrew Nayenko
+
+.SH SEE ALSO
+.BR fsck (8)
--- /dev/null
+/*
+ main.c (02.09.09)
+ exFAT file system checker.
+
+ Copyright (C) 2009, 2010 Andrew Nayenko
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <stdio.h>
+#include <string.h>
+#include <exfat.h>
+#include <exfatfs.h>
+#include <inttypes.h>
+
+#define exfat_debug(format, ...)
+
+uint64_t files_count, directories_count;
+
+static void nodeck(struct exfat* ef, struct exfat_node* node)
+{
+ const cluster_t cluster_size = CLUSTER_SIZE(*ef->sb);
+ cluster_t clusters = (node->size + cluster_size - 1) / cluster_size;
+ cluster_t c = node->start_cluster;
+
+ while (clusters--)
+ {
+ if (CLUSTER_INVALID(c))
+ {
+ char name[EXFAT_NAME_MAX + 1];
+
+ exfat_get_name(node, name, EXFAT_NAME_MAX);
+ exfat_error("file `%s' has invalid cluster", name);
+ return;
+ }
+ if (BMAP_GET(ef->cmap.chunk, c - EXFAT_FIRST_DATA_CLUSTER) == 0)
+ {
+ char name[EXFAT_NAME_MAX + 1];
+
+ exfat_get_name(node, name, EXFAT_NAME_MAX);
+ exfat_error("cluster 0x%x of file `%s' is not allocated", c, name);
+ }
+ c = exfat_next_cluster(ef, node, c);
+ }
+}
+
+static void dirck(struct exfat* ef, const char* path)
+{
+ struct exfat_node* parent;
+ struct exfat_node* node;
+ struct exfat_iterator it;
+ int rc;
+ size_t path_length;
+ char* entry_path;
+
+ if (exfat_lookup(ef, &parent, path) != 0)
+ exfat_bug("directory `%s' is not found", path);
+ if (!(parent->flags & EXFAT_ATTRIB_DIR))
+ exfat_bug("`%s' is not a directory (0x%x)", path, parent->flags);
+
+ path_length = strlen(path);
+ entry_path = malloc(path_length + 1 + EXFAT_NAME_MAX);
+ if (entry_path == NULL)
+ {
+ exfat_error("out of memory");
+ return;
+ }
+ strcpy(entry_path, path);
+ strcat(entry_path, "/");
+
+ rc = exfat_opendir(ef, parent, &it);
+ if (rc != 0)
+ {
+ free(entry_path);
+ exfat_put_node(ef, parent);
+ exfat_error("failed to open directory `%s'", path);
+ return;
+ }
+ while ((node = exfat_readdir(ef, &it)))
+ {
+ exfat_get_name(node, entry_path + path_length + 1, EXFAT_NAME_MAX);
+ exfat_debug("%s: %s, %"PRIu64" bytes, cluster %u", entry_path,
+ IS_CONTIGUOUS(*node) ? "contiguous" : "fragmented",
+ node->size, node->start_cluster);
+ if (node->flags & EXFAT_ATTRIB_DIR)
+ {
+ directories_count++;
+ dirck(ef, entry_path);
+ }
+ else
+ files_count++;
+ nodeck(ef, node);
+ exfat_put_node(ef, node);
+ }
+ exfat_closedir(ef, &it);
+ exfat_put_node(ef, parent);
+ free(entry_path);
+}
+
+static void fsck(struct exfat* ef)
+{
+ exfat_print_info(ef->sb, exfat_count_free_clusters(ef));
+ dirck(ef, "");
+}
+
+static void usage(const char* prog)
+{
+ fprintf(stderr, "Usage: %s [-v] <device>\n", prog);
+ exit(1);
+}
+
+int main(int argc, char* argv[])
+{
+ char** pp;
+ const char* spec = NULL;
+ struct exfat ef;
+
+ printf("exfatfsck %u.%u.%u\n",
+ EXFAT_VERSION_MAJOR, EXFAT_VERSION_MINOR, EXFAT_VERSION_PATCH);
+
+ for (pp = argv + 1; *pp; pp++)
+ {
+ if (strcmp(*pp, "-v") == 0)
+ {
+ puts("Copyright (C) 2009 Andrew Nayenko");
+ return 0;
+ }
+ else if (spec == NULL)
+ spec = *pp;
+ else
+ usage(argv[0]);
+ }
+ if (spec == NULL)
+ usage(argv[0]);
+
+ if (exfat_mount(&ef, spec, "ro") != 0)
+ return 1;
+
+ printf("Checking file system on %s.\n", spec);
+ fsck(&ef);
+ exfat_unmount(&ef);
+ printf("Totally %"PRIu64" directories and %"PRIu64" files.\n",
+ directories_count, files_count);
+
+ fputs("File system checking finished. ", stdout);
+ if (exfat_errors != 0)
+ {
+ printf("ERRORS FOUND: %d.\n", exfat_errors);
+ return 1;
+ }
+ puts("No errors found.");
+ return 0;
+}
--- /dev/null
+.\" Copyright (C) 2011 Andrew Nayenko
+.\"
+.TH EXFATLABEL 8 "February 2011"
+.SH NAME
+.B exfatlabel
+\- get or set an exFAT file system label
+.SH SYNOPSIS
+.B exfatlabel
+[
+.B \-v
+]
+.I device
+[
+.I label
+]
+
+.SH DESCRIPTION
+.B exfatlabel
+reads or changes an exFAT file system label (volume name).
+
+If
+.I label
+argument is present,
+.B exfatlabel
+sets the new volume name. Label can be up to 15 characters. This limit is
+shorter if characters beyond Unicode BMP are used because internally label
+is stored in UTF-16.
+
+If
+.I label
+argument is omitted,
+.B exfatlabel
+just prints current volume name.
+
+.SH COMMAND LINE OPTIONS
+Command line options available:
+.TP
+.BI \-v
+Print version and copyright.
+
+.SH EXIT CODES
+Zero is returned on success. Any other code means an error.
+
+.SH AUTHOR
+Andrew Nayenko
+
+.SH SEE ALSO
+.BR mkexfatfs (8)
--- /dev/null
+/*
+ label.c (20.01.11)
+ Prints or changes exFAT volume label.
+
+ Copyright (C) 2011 Andrew Nayenko
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <stdio.h>
+#include <string.h>
+#include <exfat.h>
+
+int main(int argc, char* argv[])
+{
+ char** pp;
+ struct exfat ef;
+ int rc = 0;
+
+ for (pp = argv + 1; *pp; pp++)
+ if (strcmp(*pp, "-v") == 0)
+ {
+ printf("exfatlabel %u.%u.%u\n", EXFAT_VERSION_MAJOR,
+ EXFAT_VERSION_MINOR, EXFAT_VERSION_PATCH);
+ puts("Copyright (C) 2011 Andrew Nayenko");
+ return 0;
+ }
+
+ if (argc != 2 && argc != 3)
+ {
+ fprintf(stderr, "Usage: %s [-v] <device> [label]\n", argv[0]);
+ return 1;
+ }
+
+ if (argv[2])
+ {
+ if (exfat_mount(&ef, argv[1], "") != 0)
+ return 1;
+ rc = (exfat_set_label(&ef, argv[2]) != 0);
+ }
+ else
+ {
+ if (exfat_mount(&ef, argv[1], "ro") != 0)
+ return 1;
+ puts(exfat_get_label(&ef));
+ }
+
+ exfat_unmount(&ef);
+ return rc;
+}
--- /dev/null
+/*
+ byteorder.h (12.01.10)
+ Endianness stuff. exFAT uses little-endian byte order.
+
+ Copyright (C) 2009, 2010 Andrew Nayenko
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef BYTEORDER_H_INCLUDED
+#define BYTEORDER_H_INCLUDED
+
+#include <stdint.h>
+
+#if defined(__GLIBC__)
+
+#include <endian.h>
+#include <byteswap.h>
+
+#elif defined(__APPLE__)
+
+#include <machine/endian.h>
+#include <libkern/OSByteOrder.h>
+#define bswap_16(x) OSSwapInt16(x)
+#define bswap_32(x) OSSwapInt32(x)
+#define bswap_64(x) OSSwapInt64(x)
+#define __BYTE_ORDER BYTE_ORDER
+#define __LITTLE_ENDIAN LITTLE_ENDIAN
+#define __BIG_ENDIAN BIG_ENDIAN
+
+#elif defined(__FreeBSD__) || defined(__DragonFlyBSD__) || defined(__NetBSD__)
+
+#include <sys/endian.h>
+#define bswap_16(x) bswap16(x)
+#define bswap_32(x) bswap32(x)
+#define bswap_64(x) bswap64(x)
+#define __BYTE_ORDER _BYTE_ORDER
+#define __LITTLE_ENDIAN _LITTLE_ENDIAN
+#define __BIG_ENDIAN _BIG_ENDIAN
+
+#elif defined(__OpenBSD__)
+
+#include <machine/endian.h>
+#define bswap_16(x) swap16(x)
+#define bswap_32(x) swap32(x)
+#define bswap_64(x) swap64(x)
+#define __BYTE_ORDER _BYTE_ORDER
+#define __LITTLE_ENDIAN _LITTLE_ENDIAN
+#define __BIG_ENDIAN _BIG_ENDIAN
+
+#elif defined(__sun)
+
+#include <sys/byteorder.h>
+#define bswap_16(x) BSWAP_16(x)
+#define bswap_32(x) BSWAP_32(x)
+#define bswap_64(x) BSWAP_64(x)
+#define __LITTLE_ENDIAN 1234
+#define __BIG_ENDIAN 4321
+#ifdef _LITTLE_ENDIAN
+#define __BYTE_ORDER __LITTLE_ENDIAN
+#else
+#define __BYTE_ORDER __BIG_ENDIAN
+#endif
+
+#else
+#error No byte order macros available for your platform
+#endif
+
+typedef struct { uint16_t __u16; } le16_t;
+typedef struct { uint32_t __u32; } le32_t;
+typedef struct { uint64_t __u64; } le64_t;
+
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+static inline uint16_t le16_to_cpu(le16_t v) { return v.__u16; }
+static inline uint32_t le32_to_cpu(le32_t v) { return v.__u32; }
+static inline uint64_t le64_to_cpu(le64_t v) { return v.__u64; }
+
+static inline le16_t cpu_to_le16(uint16_t v) { le16_t t = {v}; return t; }
+static inline le32_t cpu_to_le32(uint32_t v) { le32_t t = {v}; return t; }
+static inline le64_t cpu_to_le64(uint64_t v) { le64_t t = {v}; return t; }
+#elif __BYTE_ORDER == __BIG_ENDIAN
+static inline uint16_t le16_to_cpu(le16_t v) { return bswap_16(v.__u16); }
+static inline uint32_t le32_to_cpu(le32_t v) { return bswap_32(v.__u32); }
+static inline uint64_t le64_to_cpu(le64_t v) { return bswap_64(v.__u64); }
+
+static inline le16_t cpu_to_le16(uint16_t v)
+ { le16_t t = {bswap_16(v)}; return t; }
+static inline le32_t cpu_to_le32(uint32_t v)
+ { le32_t t = {bswap_32(v)}; return t; }
+static inline le64_t cpu_to_le64(uint64_t v)
+ { le64_t t = {bswap_64(v)}; return t; }
+#else
+#error Wow! You have a PDP machine?!
+#endif
+
+#endif /* ifndef BYTEORDER_H_INCLUDED */
--- /dev/null
+/*
+ cluster.c (03.09.09)
+ exFAT file system implementation library.
+
+ Copyright (C) 2009, 2010 Andrew Nayenko
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "exfat.h"
+#include <errno.h>
+#include <string.h>
+
+/*
+ * Sector to absolute offset.
+ */
+static off_t s2o(const struct exfat* ef, off_t sector)
+{
+ return sector << ef->sb->sector_bits;
+}
+
+/*
+ * Cluster to sector.
+ */
+static off_t c2s(const struct exfat* ef, cluster_t cluster)
+{
+ if (cluster < EXFAT_FIRST_DATA_CLUSTER)
+ exfat_bug("invalid cluster number %u", cluster);
+ return le32_to_cpu(ef->sb->cluster_sector_start) +
+ ((off_t) (cluster - EXFAT_FIRST_DATA_CLUSTER) << ef->sb->spc_bits);
+}
+
+/*
+ * Cluster to absolute offset.
+ */
+off_t exfat_c2o(const struct exfat* ef, cluster_t cluster)
+{
+ return s2o(ef, c2s(ef, cluster));
+}
+
+/*
+ * Sector to cluster.
+ */
+static cluster_t s2c(const struct exfat* ef, off_t sector)
+{
+ return ((sector - le32_to_cpu(ef->sb->cluster_sector_start)) >>
+ ef->sb->spc_bits) + EXFAT_FIRST_DATA_CLUSTER;
+}
+
+/*
+ * Size in bytes to size in clusters (rounded upwards).
+ */
+static uint32_t bytes2clusters(const struct exfat* ef, uint64_t bytes)
+{
+ uint64_t cluster_size = CLUSTER_SIZE(*ef->sb);
+ return (bytes + cluster_size - 1) / cluster_size;
+}
+
+cluster_t exfat_next_cluster(const struct exfat* ef,
+ const struct exfat_node* node, cluster_t cluster)
+{
+ le32_t next;
+ off_t fat_offset;
+
+ if (cluster < EXFAT_FIRST_DATA_CLUSTER)
+ exfat_bug("bad cluster 0x%x", cluster);
+
+ if (IS_CONTIGUOUS(*node))
+ return cluster + 1;
+ fat_offset = s2o(ef, le32_to_cpu(ef->sb->fat_sector_start))
+ + cluster * sizeof(cluster_t);
+ exfat_read_raw(&next, sizeof(next), fat_offset, ef->fd);
+ return le32_to_cpu(next);
+}
+
+cluster_t exfat_advance_cluster(const struct exfat* ef,
+ struct exfat_node* node, uint32_t count)
+{
+ uint32_t i;
+
+ if (node->fptr_index > count)
+ {
+ node->fptr_index = 0;
+ node->fptr_cluster = node->start_cluster;
+ }
+
+ for (i = node->fptr_index; i < count; i++)
+ {
+ node->fptr_cluster = exfat_next_cluster(ef, node, node->fptr_cluster);
+ if (CLUSTER_INVALID(node->fptr_cluster))
+ break;
+ }
+ node->fptr_index = count;
+ return node->fptr_cluster;
+}
+
+static cluster_t find_bit_and_set(uint8_t* bitmap, cluster_t start,
+ cluster_t end)
+{
+ const cluster_t mid_start = (start + 7) / 8 * 8;
+ const cluster_t mid_end = end / 8 * 8;
+ cluster_t c;
+ cluster_t byte;
+
+ for (c = start; c < mid_start; c++)
+ if (BMAP_GET(bitmap, c) == 0)
+ {
+ BMAP_SET(bitmap, c);
+ return c + EXFAT_FIRST_DATA_CLUSTER;
+ }
+
+ for (byte = mid_start / 8; byte < mid_end / 8; byte++)
+ if (bitmap[byte] != 0xff)
+ {
+ cluster_t bit;
+
+ for (bit = 0; bit < 8; bit++)
+ if (!(bitmap[byte] & (1u << bit)))
+ {
+ bitmap[byte] |= (1u << bit);
+ return byte * 8 + bit + EXFAT_FIRST_DATA_CLUSTER;
+ }
+ }
+
+ for (c = mid_end; c < end; c++)
+ if (BMAP_GET(bitmap, c) == 0)
+ {
+ BMAP_SET(bitmap, c);
+ return c + EXFAT_FIRST_DATA_CLUSTER;
+ }
+
+ return EXFAT_CLUSTER_END;
+}
+
+void exfat_flush_cmap(struct exfat* ef)
+{
+ exfat_write_raw(ef->cmap.chunk, (ef->cmap.chunk_size + 7) / 8,
+ exfat_c2o(ef, ef->cmap.start_cluster), ef->fd);
+ ef->cmap.dirty = 0;
+}
+
+static void set_next_cluster(const struct exfat* ef, int contiguous,
+ cluster_t current, cluster_t next)
+{
+ off_t fat_offset;
+ le32_t next_le32;
+
+ if (contiguous)
+ return;
+ fat_offset = s2o(ef, le32_to_cpu(ef->sb->fat_sector_start))
+ + current * sizeof(cluster_t);
+ next_le32 = cpu_to_le32(next);
+ exfat_write_raw(&next_le32, sizeof(next_le32), fat_offset, ef->fd);
+}
+
+static cluster_t allocate_cluster(struct exfat* ef, cluster_t hint)
+{
+ cluster_t cluster;
+
+ hint -= EXFAT_FIRST_DATA_CLUSTER;
+ if (hint >= ef->cmap.chunk_size)
+ hint = 0;
+
+ cluster = find_bit_and_set(ef->cmap.chunk, hint, ef->cmap.chunk_size);
+ if (cluster == EXFAT_CLUSTER_END)
+ cluster = find_bit_and_set(ef->cmap.chunk, 0, hint);
+ if (cluster == EXFAT_CLUSTER_END)
+ {
+ exfat_error("no free space left");
+ return EXFAT_CLUSTER_END;
+ }
+
+ ef->cmap.dirty = 1;
+ /* FIXME update percentage of used space */
+ return cluster;
+}
+
+static void free_cluster(struct exfat* ef, cluster_t cluster)
+{
+ if (CLUSTER_INVALID(cluster))
+ exfat_bug("attempting to free invalid cluster");
+ if (cluster < EXFAT_FIRST_DATA_CLUSTER ||
+ cluster - EXFAT_FIRST_DATA_CLUSTER >= ef->cmap.size)
+ exfat_bug("bad cluster 0x%x (0x%x)", cluster, ef->cmap.size);
+
+ BMAP_CLR(ef->cmap.chunk, cluster - EXFAT_FIRST_DATA_CLUSTER);
+ ef->cmap.dirty = 1;
+ /* FIXME update percentage of used space */
+}
+
+static void make_noncontiguous(const struct exfat* ef, cluster_t first,
+ cluster_t last)
+{
+ cluster_t c;
+
+ for (c = first; c < last; c++)
+ set_next_cluster(ef, 0, c, c + 1);
+}
+
+static int shrink_file(struct exfat* ef, struct exfat_node* node,
+ uint32_t current, uint32_t difference);
+
+static int grow_file(struct exfat* ef, struct exfat_node* node,
+ uint32_t current, uint32_t difference)
+{
+ cluster_t previous;
+ cluster_t next;
+ uint32_t allocated = 0;
+
+ if (difference == 0)
+ exfat_bug("zero clusters count passed");
+
+ if (node->start_cluster != EXFAT_CLUSTER_FREE)
+ {
+ /* get the last cluster of the file */
+ previous = exfat_advance_cluster(ef, node, current - 1);
+ if (CLUSTER_INVALID(previous))
+ {
+ exfat_error("invalid cluster in file");
+ return -EIO;
+ }
+ }
+ else
+ {
+ if (node->fptr_index != 0)
+ exfat_bug("non-zero pointer index (%u)", node->fptr_index);
+ /* file does not have clusters (i.e. is empty), allocate
+ the first one for it */
+ previous = allocate_cluster(ef, 0);
+ if (CLUSTER_INVALID(previous))
+ return -ENOSPC;
+ node->fptr_cluster = node->start_cluster = previous;
+ allocated = 1;
+ /* file consists of only one cluster, so it's contiguous */
+ node->flags |= EXFAT_ATTRIB_CONTIGUOUS;
+ }
+
+ while (allocated < difference)
+ {
+ next = allocate_cluster(ef, previous + 1);
+ if (CLUSTER_INVALID(next))
+ {
+ if (allocated != 0)
+ shrink_file(ef, node, current + allocated, allocated);
+ return -ENOSPC;
+ }
+ if (next != previous - 1 && IS_CONTIGUOUS(*node))
+ {
+ /* it's a pity, but we are not able to keep the file contiguous
+ anymore */
+ make_noncontiguous(ef, node->start_cluster, previous);
+ node->flags &= ~EXFAT_ATTRIB_CONTIGUOUS;
+ node->flags |= EXFAT_ATTRIB_DIRTY;
+ }
+ set_next_cluster(ef, IS_CONTIGUOUS(*node), previous, next);
+ previous = next;
+ allocated++;
+ }
+
+ set_next_cluster(ef, IS_CONTIGUOUS(*node), previous, EXFAT_CLUSTER_END);
+ return 0;
+}
+
+static int shrink_file(struct exfat* ef, struct exfat_node* node,
+ uint32_t current, uint32_t difference)
+{
+ cluster_t previous;
+ cluster_t next;
+
+ if (difference == 0)
+ exfat_bug("zero difference passed");
+ if (node->start_cluster == EXFAT_CLUSTER_FREE)
+ exfat_bug("unable to shrink empty file (%u clusters)", current);
+ if (current < difference)
+ exfat_bug("file underflow (%u < %u)", current, difference);
+
+ /* crop the file */
+ if (current > difference)
+ {
+ cluster_t last = exfat_advance_cluster(ef, node,
+ current - difference - 1);
+ if (CLUSTER_INVALID(last))
+ {
+ exfat_error("invalid cluster in file");
+ return -EIO;
+ }
+ previous = exfat_next_cluster(ef, node, last);
+ set_next_cluster(ef, IS_CONTIGUOUS(*node), last, EXFAT_CLUSTER_END);
+ }
+ else
+ {
+ previous = node->start_cluster;
+ node->start_cluster = EXFAT_CLUSTER_FREE;
+ }
+ node->fptr_index = 0;
+ node->fptr_cluster = node->start_cluster;
+
+ /* free remaining clusters */
+ while (difference--)
+ {
+ if (CLUSTER_INVALID(previous))
+ {
+ exfat_error("invalid cluster in file");
+ return -EIO;
+ }
+ next = exfat_next_cluster(ef, node, previous);
+ set_next_cluster(ef, IS_CONTIGUOUS(*node), previous,
+ EXFAT_CLUSTER_FREE);
+ free_cluster(ef, previous);
+ previous = next;
+ }
+ return 0;
+}
+
+static void erase_raw(struct exfat* ef, size_t size, off_t offset)
+{
+ exfat_write_raw(ef->zero_sector, size, offset, ef->fd);
+}
+
+static int erase_range(struct exfat* ef, struct exfat_node* node,
+ uint64_t begin, uint64_t end)
+{
+ uint64_t sector_boundary;
+ cluster_t cluster;
+
+ if (begin >= end)
+ return 0;
+
+ sector_boundary = (node->size | (SECTOR_SIZE(*ef->sb) - 1)) + 1;
+ cluster = exfat_advance_cluster(ef, node,
+ node->size / CLUSTER_SIZE(*ef->sb));
+ if (CLUSTER_INVALID(cluster))
+ {
+ exfat_error("invalid cluster in file");
+ return -EIO;
+ }
+ /* erase from the beginning to the closest sector boundary */
+ erase_raw(ef, MIN(sector_boundary, end) - node->size,
+ exfat_c2o(ef, cluster) + node->size % CLUSTER_SIZE(*ef->sb));
+ /* erase whole sectors */
+ while (sector_boundary < end)
+ {
+ if (sector_boundary % CLUSTER_SIZE(*ef->sb) == 0)
+ cluster = exfat_next_cluster(ef, node, cluster);
+ erase_raw(ef, SECTOR_SIZE(*ef->sb),
+ exfat_c2o(ef, cluster) + sector_boundary % CLUSTER_SIZE(*ef->sb));
+ sector_boundary += SECTOR_SIZE(*ef->sb);
+ }
+ return 0;
+}
+
+int exfat_truncate(struct exfat* ef, struct exfat_node* node, uint64_t size)
+{
+ uint32_t c1 = bytes2clusters(ef, node->size);
+ uint32_t c2 = bytes2clusters(ef, size);
+ int rc = 0;
+
+ if (node->references == 0 && node->parent)
+ exfat_bug("no references, node changes can be lost");
+
+ if (node->size == size)
+ return 0;
+
+ if (c1 < c2)
+ rc = grow_file(ef, node, c1, c2 - c1);
+ else if (c1 > c2)
+ rc = shrink_file(ef, node, c1, c1 - c2);
+
+ if (rc != 0)
+ return rc;
+
+ rc = erase_range(ef, node, node->size, size);
+ if (rc != 0)
+ return rc;
+
+ exfat_update_mtime(node);
+ node->size = size;
+ node->flags |= EXFAT_ATTRIB_DIRTY;
+ return 0;
+}
+
+uint32_t exfat_count_free_clusters(const struct exfat* ef)
+{
+ uint32_t free_clusters = 0;
+ uint32_t i;
+
+ for (i = 0; i < ef->cmap.size; i++)
+ if (BMAP_GET(ef->cmap.chunk, i) == 0)
+ free_clusters++;
+ return free_clusters;
+}
+
+static int find_used_clusters(const struct exfat* ef,
+ cluster_t* a, cluster_t* b)
+{
+ const cluster_t end = le32_to_cpu(ef->sb->cluster_count);
+
+ /* find first used cluster */
+ for (*a = *b + 1; *a < end; (*a)++)
+ if (BMAP_GET(ef->cmap.chunk, *a - EXFAT_FIRST_DATA_CLUSTER))
+ break;
+ if (*a >= end)
+ return 1;
+
+ /* find last contiguous used cluster */
+ for (*b = *a; *b < end; (*b)++)
+ if (BMAP_GET(ef->cmap.chunk, *b - EXFAT_FIRST_DATA_CLUSTER) == 0)
+ {
+ (*b)--;
+ break;
+ }
+
+ return 0;
+}
+
+int exfat_find_used_sectors(const struct exfat* ef, off_t* a, off_t* b)
+{
+ cluster_t ca, cb;
+
+ if (*a == 0 && *b == 0)
+ ca = cb = EXFAT_FIRST_DATA_CLUSTER - 1;
+ else
+ {
+ ca = s2c(ef, *a);
+ cb = s2c(ef, *b);
+ }
+ if (find_used_clusters(ef, &ca, &cb) != 0)
+ return 1;
+ if (*a != 0 || *b != 0)
+ *a = c2s(ef, ca);
+ *b = c2s(ef, cb) + (CLUSTER_SIZE(*ef->sb) - 1) / SECTOR_SIZE(*ef->sb);
+ return 0;
+}
--- /dev/null
+/*
+ exfat.h (29.08.09)
+ Definitions of structures and constants used in exFAT file system
+ implementation.
+
+ Copyright (C) 2009, 2010 Andrew Nayenko
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef EXFAT_H_INCLUDED
+#define EXFAT_H_INCLUDED
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include "exfatfs.h"
+#include "version.h"
+
+#define EXFAT_NAME_MAX 256
+#define EXFAT_ATTRIB_CONTIGUOUS 0x10000
+#define EXFAT_ATTRIB_CACHED 0x20000
+#define EXFAT_ATTRIB_DIRTY 0x40000
+#define EXFAT_ATTRIB_UNLINKED 0x80000
+#define IS_CONTIGUOUS(node) (((node).flags & EXFAT_ATTRIB_CONTIGUOUS) != 0)
+#define SECTOR_SIZE(sb) (1 << (sb).sector_bits)
+#define CLUSTER_SIZE(sb) (SECTOR_SIZE(sb) << (sb).spc_bits)
+#define CLUSTER_INVALID(c) ((c) == EXFAT_CLUSTER_BAD || (c) == EXFAT_CLUSTER_END)
+
+#define MIN(a, b) ((a) < (b) ? (a) : (b))
+#define DIV_ROUND_UP(x, d) (((x) + (d) - 1) / (d))
+
+#define BMAP_GET(bitmap, index) \
+ (((uint8_t*) bitmap)[(index) / 8] & (1u << ((index) % 8)))
+#define BMAP_SET(bitmap, index) \
+ ((uint8_t*) bitmap)[(index) / 8] |= (1u << ((index) % 8))
+#define BMAP_CLR(bitmap, index) \
+ ((uint8_t*) bitmap)[(index) / 8] &= ~(1u << ((index) % 8))
+
+struct exfat_node
+{
+ struct exfat_node* parent;
+ struct exfat_node* child;
+ struct exfat_node* next;
+ struct exfat_node* prev;
+
+ int references;
+ uint32_t fptr_index;
+ cluster_t fptr_cluster;
+ cluster_t entry_cluster;
+ off_t entry_offset;
+ cluster_t start_cluster;
+ int flags;
+ uint64_t size;
+ time_t mtime, atime;
+ le16_t name[EXFAT_NAME_MAX + 1];
+};
+
+struct exfat
+{
+ struct exfat_super_block* sb;
+ int fd;
+ le16_t* upcase;
+ size_t upcase_chars;
+ struct exfat_node* root;
+ struct
+ {
+ cluster_t start_cluster;
+ uint32_t size; /* in bits */
+ uint8_t* chunk;
+ uint32_t chunk_size; /* in bits */
+ int dirty;
+ }
+ cmap;
+ char label[EXFAT_ENAME_MAX * 6 + 1]; /* a character can occupy up to
+ 6 bytes in UTF-8 */
+ void* zero_sector;
+ int dmask, fmask;
+ uid_t uid;
+ gid_t gid;
+ int ro;
+ int noatime;
+};
+
+/* in-core nodes iterator */
+struct exfat_iterator
+{
+ struct exfat_node* parent;
+ struct exfat_node* current;
+};
+
+struct exfat_human_bytes
+{
+ uint64_t value;
+ const char* unit;
+};
+
+extern int exfat_errors;
+
+void exfat_bug(const char* format, ...)
+ __attribute__((format(printf, 1, 2), noreturn));
+void exfat_error(const char* format, ...)
+ __attribute__((format(printf, 1, 2)));
+void exfat_warn(const char* format, ...)
+ __attribute__((format(printf, 1, 2)));
+void exfat_debug(const char* format, ...)
+ __attribute__((format(printf, 1, 2)));
+
+int exfat_open(const char* spec, int ro);
+void exfat_read_raw(void* buffer, size_t size, off_t offset, int fd);
+void exfat_write_raw(const void* buffer, size_t size, off_t offset, int fd);
+ssize_t exfat_read(const struct exfat* ef, struct exfat_node* node,
+ void* buffer, size_t size, off_t offset);
+ssize_t exfat_write(struct exfat* ef, struct exfat_node* node,
+ const void* buffer, size_t size, off_t offset);
+
+int exfat_opendir(struct exfat* ef, struct exfat_node* dir,
+ struct exfat_iterator* it);
+void exfat_closedir(struct exfat* ef, struct exfat_iterator* it);
+struct exfat_node* exfat_readdir(struct exfat* ef, struct exfat_iterator* it);
+int exfat_lookup(struct exfat* ef, struct exfat_node** node,
+ const char* path);
+int exfat_split(struct exfat* ef, struct exfat_node** parent,
+ struct exfat_node** node, le16_t* name, const char* path);
+
+off_t exfat_c2o(const struct exfat* ef, cluster_t cluster);
+cluster_t exfat_next_cluster(const struct exfat* ef,
+ const struct exfat_node* node, cluster_t cluster);
+cluster_t exfat_advance_cluster(const struct exfat* ef,
+ struct exfat_node* node, uint32_t count);
+void exfat_flush_cmap(struct exfat* ef);
+int exfat_truncate(struct exfat* ef, struct exfat_node* node, uint64_t size);
+uint32_t exfat_count_free_clusters(const struct exfat* ef);
+int exfat_find_used_sectors(const struct exfat* ef, off_t* a, off_t* b);
+
+void exfat_stat(const struct exfat* ef, const struct exfat_node* node,
+ struct stat* stbuf);
+time_t exfat_exfat2unix(le16_t date, le16_t time, uint8_t centisec);
+void exfat_unix2exfat(time_t unix_time, le16_t* date, le16_t* time,
+ uint8_t* centisec);
+void exfat_get_name(const struct exfat_node* node, char* buffer, size_t n);
+uint16_t exfat_start_checksum(const struct exfat_entry_meta1* entry);
+uint16_t exfat_add_checksum(const void* entry, uint16_t sum);
+le16_t exfat_calc_checksum(const struct exfat_entry_meta1* meta1,
+ const struct exfat_entry_meta2* meta2, const le16_t* name);
+uint32_t exfat_vbr_start_checksum(const void* sector, size_t size);
+uint32_t exfat_vbr_add_checksum(const void* sector, size_t size, uint32_t sum);
+le16_t exfat_calc_name_hash(const struct exfat* ef, const le16_t* name);
+void exfat_humanize_bytes(uint64_t value, struct exfat_human_bytes* hb);
+void exfat_print_info(const struct exfat_super_block* sb,
+ uint32_t free_clusters);
+
+int utf16_to_utf8(char* output, const le16_t* input, size_t outsize,
+ size_t insize);
+int utf8_to_utf16(le16_t* output, const char* input, size_t outsize,
+ size_t insize);
+size_t utf16_length(const le16_t* str);
+
+struct exfat_node* exfat_get_node(struct exfat_node* node);
+void exfat_put_node(struct exfat* ef, struct exfat_node* node);
+int exfat_cache_directory(struct exfat* ef, struct exfat_node* dir);
+void exfat_reset_cache(struct exfat* ef);
+void exfat_flush_node(struct exfat* ef, struct exfat_node* node);
+int exfat_unlink(struct exfat* ef, struct exfat_node* node);
+int exfat_rmdir(struct exfat* ef, struct exfat_node* node);
+int exfat_mknod(struct exfat* ef, const char* path);
+int exfat_mkdir(struct exfat* ef, const char* path);
+int exfat_rename(struct exfat* ef, const char* old_path, const char* new_path);
+void exfat_utimes(struct exfat_node* node, const struct timespec tv[2]);
+void exfat_update_atime(struct exfat_node* node);
+void exfat_update_mtime(struct exfat_node* node);
+const char* exfat_get_label(struct exfat* ef);
+int exfat_set_label(struct exfat* ef, const char* label);
+
+int exfat_mount(struct exfat* ef, const char* spec, const char* options);
+void exfat_unmount(struct exfat* ef);
+
+#endif /* ifndef EXFAT_H_INCLUDED */
--- /dev/null
+/*
+ exfatfs.h (29.08.09)
+ Definitions of structures and constants used in exFAT file system.
+
+ Copyright (C) 2009, 2010 Andrew Nayenko
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef EXFATFS_H_INCLUDED
+#define EXFATFS_H_INCLUDED
+
+#include "byteorder.h"
+
+typedef uint32_t cluster_t; /* cluster number */
+
+#define EXFAT_FIRST_DATA_CLUSTER 2
+
+#define EXFAT_CLUSTER_FREE 0 /* free cluster */
+#define EXFAT_CLUSTER_BAD 0xfffffff7 /* cluster contains bad sector */
+#define EXFAT_CLUSTER_END 0xffffffff /* final cluster of file or directory */
+
+struct exfat_super_block
+{
+ uint8_t jump[3]; /* 0x00 jmp and nop instructions */
+ uint8_t oem_name[8]; /* 0x03 "EXFAT " */
+ uint8_t __unused1[53]; /* 0x0B always 0 */
+ le64_t sector_start; /* 0x40 partition first sector */
+ le64_t sector_count; /* 0x48 partition sectors count */
+ le32_t fat_sector_start; /* 0x50 FAT first sector */
+ le32_t fat_sector_count; /* 0x54 FAT sectors count */
+ le32_t cluster_sector_start; /* 0x58 first cluster sector */
+ le32_t cluster_count; /* 0x5C total clusters count */
+ le32_t rootdir_cluster; /* 0x60 first cluster of the root dir */
+ le32_t volume_serial; /* 0x64 volume serial number */
+ struct /* 0x68 FS version */
+ {
+ uint8_t minor;
+ uint8_t major;
+ }
+ version;
+ le16_t volume_state; /* 0x6A volume state flags */
+ uint8_t sector_bits; /* 0x6C sector size as (1 << n) */
+ uint8_t spc_bits; /* 0x6D sectors per cluster as (1 << n) */
+ uint8_t fat_count; /* 0x6E always 1 */
+ uint8_t drive_no; /* 0x6F always 0x80 */
+ uint8_t allocated_percent; /* 0x70 percentage of allocated space */
+ uint8_t __unused2[397]; /* 0x71 always 0 */
+ le16_t boot_signature; /* the value of 0xAA55 */
+}
+__attribute__((__packed__));
+
+#define EXFAT_ENTRY_VALID 0x80
+#define EXFAT_ENTRY_CONTINUED 0x40
+
+#define EXFAT_ENTRY_EOD (0x00)
+#define EXFAT_ENTRY_BITMAP (0x01 | EXFAT_ENTRY_VALID)
+#define EXFAT_ENTRY_UPCASE (0x02 | EXFAT_ENTRY_VALID)
+#define EXFAT_ENTRY_LABEL (0x03 | EXFAT_ENTRY_VALID)
+#define EXFAT_ENTRY_FILE (0x05 | EXFAT_ENTRY_VALID)
+#define EXFAT_ENTRY_FILE_INFO (0x00 | EXFAT_ENTRY_VALID | EXFAT_ENTRY_CONTINUED)
+#define EXFAT_ENTRY_FILE_NAME (0x01 | EXFAT_ENTRY_VALID | EXFAT_ENTRY_CONTINUED)
+
+struct exfat_entry /* common container for all entries */
+{
+ uint8_t type; /* any of EXFAT_ENTRY_xxx */
+ uint8_t data[31];
+}
+__attribute__((__packed__));
+
+#define EXFAT_ENAME_MAX 15
+
+struct exfat_entry_bitmap /* allocated clusters bitmap */
+{
+ uint8_t type; /* EXFAT_ENTRY_BITMAP */
+ uint8_t __unknown1[19];
+ le32_t start_cluster;
+ le64_t size; /* in bytes */
+}
+__attribute__((__packed__));
+
+struct exfat_entry_upcase /* upper case translation table */
+{
+ uint8_t type; /* EXFAT_ENTRY_UPCASE */
+ uint8_t __unknown1[3];
+ le32_t checksum;
+ uint8_t __unknown2[12];
+ le32_t start_cluster;
+ le64_t size; /* in bytes */
+}
+__attribute__((__packed__));
+
+struct exfat_entry_label /* volume label */
+{
+ uint8_t type; /* EXFAT_ENTRY_LABEL */
+ uint8_t length; /* number of characters */
+ le16_t name[EXFAT_ENAME_MAX]; /* in UTF-16LE */
+}
+__attribute__((__packed__));
+
+#define EXFAT_ATTRIB_RO 0x01
+#define EXFAT_ATTRIB_HIDDEN 0x02
+#define EXFAT_ATTRIB_SYSTEM 0x04
+#define EXFAT_ATTRIB_VOLUME 0x08
+#define EXFAT_ATTRIB_DIR 0x10
+#define EXFAT_ATTRIB_ARCH 0x20
+
+struct exfat_entry_meta1 /* file or directory info (part 1) */
+{
+ uint8_t type; /* EXFAT_ENTRY_FILE */
+ uint8_t continuations;
+ le16_t checksum;
+ le16_t attrib; /* combination of EXFAT_ATTRIB_xxx */
+ le16_t __unknown1;
+ le16_t crtime, crdate; /* creation date and time */
+ le16_t mtime, mdate; /* latest modification date and time */
+ le16_t atime, adate; /* latest access date and time */
+ uint8_t crtime_cs; /* creation time in cs (centiseconds) */
+ uint8_t mtime_cs; /* latest modification time in cs */
+ uint8_t __unknown2[10];
+}
+__attribute__((__packed__));
+
+#define EXFAT_FLAG_ALWAYS1 (1u << 0)
+#define EXFAT_FLAG_CONTIGUOUS (1u << 1)
+
+struct exfat_entry_meta2 /* file or directory info (part 2) */
+{
+ uint8_t type; /* EXFAT_ENTRY_FILE_INFO */
+ uint8_t flags; /* combination of EXFAT_FLAG_xxx */
+ uint8_t __unknown1;
+ uint8_t name_length;
+ le16_t name_hash;
+ le16_t __unknown2;
+ le64_t real_size; /* in bytes, equals to size */
+ uint8_t __unknown3[4];
+ le32_t start_cluster;
+ le64_t size; /* in bytes, equals to real_size */
+}
+__attribute__((__packed__));
+
+struct exfat_entry_name /* file or directory name */
+{
+ uint8_t type; /* EXFAT_ENTRY_FILE_NAME */
+ uint8_t __unknown;
+ le16_t name[EXFAT_ENAME_MAX]; /* in UTF-16LE */
+}
+__attribute__((__packed__));
+
+#endif /* ifndef EXFATFS_H_INCLUDED */
--- /dev/null
+/*
+ io.c (02.09.09)
+ exFAT file system implementation library.
+
+ Copyright (C) 2009, 2010 Andrew Nayenko
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "exfat.h"
+#include <inttypes.h>
+#include <sys/types.h>
+#include <sys/uio.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#define __USE_UNIX98 /* for pread() in Linux */
+#include <unistd.h>
+
+#if _FILE_OFFSET_BITS != 64
+ #error You should define _FILE_OFFSET_BITS=64
+#endif
+
+int exfat_open(const char* spec, int ro)
+{
+ int fd;
+ struct stat stbuf;
+
+ fd = open(spec, ro ? O_RDONLY : O_RDWR);
+ if (fd < 0)
+ {
+ exfat_error("failed to open `%s'", spec);
+ return -1;
+ }
+ if (fstat(fd, &stbuf) != 0)
+ {
+ close(fd);
+ exfat_error("failed to fstat `%s'", spec);
+ return -1;
+ }
+ if (!S_ISBLK(stbuf.st_mode) && !S_ISREG(stbuf.st_mode))
+ {
+ close(fd);
+ exfat_error("`%s' is neither a block device, nor a regular file",
+ spec);
+ return -1;
+ }
+ return fd;
+}
+
+void exfat_read_raw(void* buffer, size_t size, off_t offset, int fd)
+{
+ if (pread(fd, buffer, size, offset) != size)
+ exfat_bug("failed to read %zu bytes from file at %"PRIu64, size,
+ (uint64_t) offset);
+}
+
+void exfat_write_raw(const void* buffer, size_t size, off_t offset, int fd)
+{
+ if (pwrite(fd, buffer, size, offset) != size)
+ exfat_bug("failed to write %zu bytes to file at %"PRIu64, size,
+ (uint64_t) offset);
+}
+
+ssize_t exfat_read(const struct exfat* ef, struct exfat_node* node,
+ void* buffer, size_t size, off_t offset)
+{
+ cluster_t cluster;
+ char* bufp = buffer;
+ off_t lsize, loffset, remainder;
+
+ if (offset >= node->size)
+ return 0;
+ if (size == 0)
+ return 0;
+
+ cluster = exfat_advance_cluster(ef, node, offset / CLUSTER_SIZE(*ef->sb));
+ if (CLUSTER_INVALID(cluster))
+ {
+ exfat_error("got invalid cluster");
+ return -1;
+ }
+
+ loffset = offset % CLUSTER_SIZE(*ef->sb);
+ remainder = MIN(size, node->size - offset);
+ while (remainder > 0)
+ {
+ if (CLUSTER_INVALID(cluster))
+ {
+ exfat_error("got invalid cluster");
+ return -1;
+ }
+ lsize = MIN(CLUSTER_SIZE(*ef->sb) - loffset, remainder);
+ exfat_read_raw(bufp, lsize, exfat_c2o(ef, cluster) + loffset, ef->fd);
+ bufp += lsize;
+ loffset = 0;
+ remainder -= lsize;
+ cluster = exfat_next_cluster(ef, node, cluster);
+ }
+ if (!ef->ro && !ef->noatime)
+ exfat_update_atime(node);
+ return size - remainder;
+}
+
+ssize_t exfat_write(struct exfat* ef, struct exfat_node* node,
+ const void* buffer, size_t size, off_t offset)
+{
+ cluster_t cluster;
+ const char* bufp = buffer;
+ off_t lsize, loffset, remainder;
+
+ if (offset + size > node->size)
+ {
+ int rc = exfat_truncate(ef, node, offset + size);
+ if (rc != 0)
+ return rc;
+ }
+ if (size == 0)
+ return 0;
+
+ cluster = exfat_advance_cluster(ef, node, offset / CLUSTER_SIZE(*ef->sb));
+ if (CLUSTER_INVALID(cluster))
+ {
+ exfat_error("got invalid cluster");
+ return -1;
+ }
+
+ loffset = offset % CLUSTER_SIZE(*ef->sb);
+ remainder = size;
+ while (remainder > 0)
+ {
+ if (CLUSTER_INVALID(cluster))
+ {
+ exfat_error("got invalid cluster");
+ return -1;
+ }
+ lsize = MIN(CLUSTER_SIZE(*ef->sb) - loffset, remainder);
+ exfat_write_raw(bufp, lsize, exfat_c2o(ef, cluster) + loffset, ef->fd);
+ bufp += lsize;
+ loffset = 0;
+ remainder -= lsize;
+ cluster = exfat_next_cluster(ef, node, cluster);
+ }
+ exfat_update_mtime(node);
+ return size - remainder;
+}
--- /dev/null
+/*
+ log.c (02.09.09)
+ exFAT file system implementation library.
+
+ Copyright (C) 2009, 2010 Andrew Nayenko
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "exfat.h"
+#include <stdarg.h>
+#include <syslog.h>
+
+int exfat_errors;
+
+/*
+ * This message means an internal bug in exFAT implementation.
+ */
+void exfat_bug(const char* format, ...)
+{
+ va_list ap, aq;
+
+ va_start(ap, format);
+ va_copy(aq, ap);
+
+ fflush(stdout);
+ fputs("BUG: ", stderr);
+ vfprintf(stderr, format, ap);
+ va_end(ap);
+ fputs(".\n", stderr);
+
+ vsyslog(LOG_CRIT, format, aq);
+ va_end(aq);
+
+ abort();
+}
+
+/*
+ * This message means an error in exFAT file system.
+ */
+void exfat_error(const char* format, ...)
+{
+ va_list ap, aq;
+
+ exfat_errors++;
+ va_start(ap, format);
+ va_copy(aq, ap);
+
+ fflush(stdout);
+ fputs("ERROR: ", stderr);
+ vfprintf(stderr, format, ap);
+ va_end(ap);
+ fputs(".\n", stderr);
+
+ vsyslog(LOG_ERR, format, aq);
+ va_end(aq);
+}
+
+/*
+ * This message means that there is something unexpected in exFAT file system
+ * that can be a potential problem.
+ */
+void exfat_warn(const char* format, ...)
+{
+ va_list ap, aq;
+
+ va_start(ap, format);
+ va_copy(aq, ap);
+
+ fflush(stdout);
+ fputs("WARN: ", stderr);
+ vfprintf(stderr, format, ap);
+ va_end(ap);
+ fputs(".\n", stderr);
+
+ vsyslog(LOG_WARNING, format, aq);
+ va_end(aq);
+}
+
+/*
+ * Just debug message. Disabled by default.
+ */
+void exfat_debug(const char* format, ...)
+{
+ va_list ap;
+
+ fflush(stdout);
+ fputs("DEBUG: ", stderr);
+ va_start(ap, format);
+ vfprintf(stderr, format, ap);
+ va_end(ap);
+ fputs(".\n", stderr);
+}
--- /dev/null
+/*
+ lookup.c (02.09.09)
+ exFAT file system implementation library.
+
+ Copyright (C) 2009, 2010 Andrew Nayenko
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "exfat.h"
+#include <string.h>
+#include <errno.h>
+#include <inttypes.h>
+
+int exfat_opendir(struct exfat* ef, struct exfat_node* dir,
+ struct exfat_iterator* it)
+{
+ int rc;
+
+ exfat_get_node(dir);
+ it->parent = dir;
+ it->current = NULL;
+ rc = exfat_cache_directory(ef, dir);
+ if (rc != 0)
+ exfat_put_node(ef, dir);
+ return rc;
+}
+
+void exfat_closedir(struct exfat* ef, struct exfat_iterator* it)
+{
+ exfat_put_node(ef, it->parent);
+ it->parent = NULL;
+ it->current = NULL;
+}
+
+struct exfat_node* exfat_readdir(struct exfat* ef, struct exfat_iterator* it)
+{
+ if (it->current == NULL)
+ it->current = it->parent->child;
+ else
+ it->current = it->current->next;
+
+ if (it->current != NULL)
+ return exfat_get_node(it->current);
+ else
+ return NULL;
+}
+
+static int compare_char(struct exfat* ef, uint16_t a, uint16_t b)
+{
+ if (a >= ef->upcase_chars || b >= ef->upcase_chars)
+ return (int) a - (int) b;
+
+ return (int) le16_to_cpu(ef->upcase[a]) - (int) le16_to_cpu(ef->upcase[b]);
+}
+
+static int compare_name(struct exfat* ef, const le16_t* a, const le16_t* b)
+{
+ while (le16_to_cpu(*a) && le16_to_cpu(*b))
+ {
+ int rc = compare_char(ef, le16_to_cpu(*a), le16_to_cpu(*b));
+ if (rc != 0)
+ return rc;
+ a++;
+ b++;
+ }
+ return compare_char(ef, le16_to_cpu(*a), le16_to_cpu(*b));
+}
+
+static int lookup_name(struct exfat* ef, struct exfat_node* parent,
+ struct exfat_node** node, const char* name, size_t n)
+{
+ struct exfat_iterator it;
+ le16_t buffer[EXFAT_NAME_MAX + 1];
+ int rc;
+
+ *node = NULL;
+
+ rc = utf8_to_utf16(buffer, name, EXFAT_NAME_MAX, n);
+ if (rc != 0)
+ return rc;
+
+ rc = exfat_opendir(ef, parent, &it);
+ if (rc != 0)
+ return rc;
+ while ((*node = exfat_readdir(ef, &it)))
+ {
+ if (compare_name(ef, buffer, (*node)->name) == 0)
+ {
+ exfat_closedir(ef, &it);
+ return 0;
+ }
+ exfat_put_node(ef, *node);
+ }
+ exfat_closedir(ef, &it);
+ return -ENOENT;
+}
+
+static size_t get_comp(const char* path, const char** comp)
+{
+ const char* end;
+
+ *comp = path + strspn(path, "/"); /* skip leading slashes */
+ end = strchr(*comp, '/');
+ if (end == NULL)
+ return strlen(*comp);
+ else
+ return end - *comp;
+}
+
+int exfat_lookup(struct exfat* ef, struct exfat_node** node,
+ const char* path)
+{
+ struct exfat_node* parent;
+ const char* p;
+ size_t n;
+ int rc;
+
+ /* start from the root directory */
+ parent = *node = exfat_get_node(ef->root);
+ for (p = path; (n = get_comp(p, &p)); p += n)
+ {
+ if (n == 1 && *p == '.') /* skip "." component */
+ continue;
+ rc = lookup_name(ef, parent, node, p, n);
+ if (rc != 0)
+ {
+ exfat_put_node(ef, parent);
+ return rc;
+ }
+ exfat_put_node(ef, parent);
+ parent = *node;
+ }
+ return 0;
+}
+
+static int is_last_comp(const char* comp, size_t length)
+{
+ const char* p = comp + length;
+
+ return get_comp(p, &p) == 0;
+}
+
+static int is_allowed(const char* comp, size_t length)
+{
+ size_t i;
+
+ for (i = 0; i < length; i++)
+ switch (comp[i])
+ {
+ case 0x01 ... 0x1f:
+ case '/':
+ case '\\':
+ case ':':
+ case '*':
+ case '?':
+ case '"':
+ case '<':
+ case '>':
+ case '|':
+ return 0;
+ }
+ return 1;
+}
+
+int exfat_split(struct exfat* ef, struct exfat_node** parent,
+ struct exfat_node** node, le16_t* name, const char* path)
+{
+ const char* p;
+ size_t n;
+ int rc;
+
+ memset(name, 0, (EXFAT_NAME_MAX + 1) * sizeof(le16_t));
+ *parent = *node = exfat_get_node(ef->root);
+ for (p = path; (n = get_comp(p, &p)); p += n)
+ {
+ if (n == 1 && *p == '.')
+ continue;
+ if (is_last_comp(p, n))
+ {
+ if (!is_allowed(p, n))
+ {
+ /* contains characters that are not allowed */
+ exfat_put_node(ef, *parent);
+ return -ENOENT;
+ }
+ rc = utf8_to_utf16(name, p, EXFAT_NAME_MAX, n);
+ if (rc != 0)
+ {
+ exfat_put_node(ef, *parent);
+ return rc;
+ }
+
+ rc = lookup_name(ef, *parent, node, p, n);
+ if (rc != 0 && rc != -ENOENT)
+ {
+ exfat_put_node(ef, *parent);
+ return rc;
+ }
+ return 0;
+ }
+ rc = lookup_name(ef, *parent, node, p, n);
+ if (rc != 0)
+ {
+ exfat_put_node(ef, *parent);
+ return rc;
+ }
+ exfat_put_node(ef, *parent);
+ *parent = *node;
+ }
+ exfat_bug("impossible");
+}
--- /dev/null
+/*
+ mount.c (22.10.09)
+ exFAT file system implementation library.
+
+ Copyright (C) 2009, 2010 Andrew Nayenko
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "exfat.h"
+#include <string.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <unistd.h>
+#include <sys/types.h>
+#define _XOPEN_SOURCE /* for tzset() in Linux */
+#include <time.h>
+
+static uint64_t rootdir_size(const struct exfat* ef)
+{
+ uint64_t clusters = 0;
+ cluster_t rootdir_cluster = le32_to_cpu(ef->sb->rootdir_cluster);
+
+ while (!CLUSTER_INVALID(rootdir_cluster))
+ {
+ clusters++;
+ /* root directory cannot be contiguous because there is no flag
+ to indicate this */
+ rootdir_cluster = exfat_next_cluster(ef, ef->root, rootdir_cluster);
+ }
+ return clusters * CLUSTER_SIZE(*ef->sb);
+}
+
+static const char* get_option(const char* options, const char* option_name)
+{
+ const char* p;
+ size_t length = strlen(option_name);
+
+ for (p = strstr(options, option_name); p; p = strstr(p + 1, option_name))
+ if ((p == options || p[-1] == ',') && p[length] == '=')
+ return p + length + 1;
+ return NULL;
+}
+
+static int get_int_option(const char* options, const char* option_name,
+ int base, int default_value)
+{
+ const char* p = get_option(options, option_name);
+
+ if (p == NULL)
+ return default_value;
+ return strtol(p, NULL, base);
+}
+
+static int match_option(const char* options, const char* option_name)
+{
+ const char* p;
+ size_t length = strlen(option_name);
+
+ for (p = strstr(options, option_name); p; p = strstr(p + 1, option_name))
+ if ((p == options || p[-1] == ',') &&
+ (p[length] == ',' || p[length] == '\0'))
+ return 1;
+ return 0;
+}
+
+static void parse_options(struct exfat* ef, const char* options)
+{
+ int sys_umask = umask(0);
+ int opt_umask;
+
+ umask(sys_umask); /* restore umask */
+ opt_umask = get_int_option(options, "umask", 8, sys_umask);
+ ef->dmask = get_int_option(options, "dmask", 8, opt_umask) & 0777;
+ ef->fmask = get_int_option(options, "fmask", 8, opt_umask) & 0777;
+
+ ef->uid = get_int_option(options, "uid", 10, geteuid());
+ ef->gid = get_int_option(options, "gid", 10, getegid());
+
+ ef->ro = match_option(options, "ro");
+ ef->noatime = match_option(options, "noatime");
+}
+
+static int verify_vbr_checksum(void* sector, off_t sector_size, int fd)
+{
+ uint32_t vbr_checksum;
+ int i;
+
+ exfat_read_raw(sector, sector_size, 0, fd);
+ vbr_checksum = exfat_vbr_start_checksum(sector, sector_size);
+ for (i = 1; i < 11; i++)
+ {
+ exfat_read_raw(sector, sector_size, i * sector_size, fd);
+ vbr_checksum = exfat_vbr_add_checksum(sector, sector_size,
+ vbr_checksum);
+ }
+ exfat_read_raw(sector, sector_size, i * sector_size, fd);
+ for (i = 0; i < sector_size / sizeof(vbr_checksum); i++)
+ if (le32_to_cpu(((const le32_t*) sector)[i]) != vbr_checksum)
+ {
+ exfat_error("invalid VBR checksum 0x%x (expected 0x%x)",
+ le32_to_cpu(((const le32_t*) sector)[i]), vbr_checksum);
+ return 1;
+ }
+ return 0;
+}
+
+int exfat_mount(struct exfat* ef, const char* spec, const char* options)
+{
+ int rc;
+
+ tzset();
+ memset(ef, 0, sizeof(struct exfat));
+
+ ef->sb = malloc(sizeof(struct exfat_super_block));
+ if (ef->sb == NULL)
+ {
+ exfat_error("memory allocation failed");
+ return -ENOMEM;
+ }
+ memset(ef->sb, 0, sizeof(struct exfat_super_block));
+
+ parse_options(ef, options);
+
+ ef->fd = exfat_open(spec, ef->ro);
+ if (ef->fd < 0)
+ {
+ free(ef->sb);
+ return -EIO;
+ }
+
+ exfat_read_raw(ef->sb, sizeof(struct exfat_super_block), 0, ef->fd);
+ if (memcmp(ef->sb->oem_name, "EXFAT ", 8) != 0)
+ {
+ close(ef->fd);
+ free(ef->sb);
+ exfat_error("exFAT file system is not found");
+ return -EIO;
+ }
+ if (ef->sb->version.major != 1 || ef->sb->version.minor != 0)
+ {
+ close(ef->fd);
+ exfat_error("unsupported exFAT version: %hhu.%hhu",
+ ef->sb->version.major, ef->sb->version.minor);
+ free(ef->sb);
+ return -EIO;
+ }
+ if (ef->sb->fat_count != 1)
+ {
+ close(ef->fd);
+ free(ef->sb);
+ exfat_error("unsupported FAT count: %hhu", ef->sb->fat_count);
+ return -EIO;
+ }
+ /* officially exFAT supports cluster size up to 32 MB */
+ if ((int) ef->sb->sector_bits + (int) ef->sb->spc_bits > 25)
+ {
+ close(ef->fd);
+ free(ef->sb);
+ exfat_error("too big cluster size: 2^%d",
+ (int) ef->sb->sector_bits + (int) ef->sb->spc_bits);
+ return -EIO;
+ }
+
+ ef->zero_sector = malloc(SECTOR_SIZE(*ef->sb));
+ if (ef->zero_sector == NULL)
+ {
+ close(ef->fd);
+ free(ef->sb);
+ exfat_error("failed to allocate zero sector");
+ return -ENOMEM;
+ }
+ /* use zero_sector as a temporary buffer for VBR checksum verification */
+ if (verify_vbr_checksum(ef->zero_sector, SECTOR_SIZE(*ef->sb), ef->fd) != 0)
+ {
+ free(ef->zero_sector);
+ close(ef->fd);
+ free(ef->sb);
+ return -EIO;
+ }
+ memset(ef->zero_sector, 0, SECTOR_SIZE(*ef->sb));
+
+ ef->root = malloc(sizeof(struct exfat_node));
+ if (ef->root == NULL)
+ {
+ free(ef->zero_sector);
+ close(ef->fd);
+ free(ef->sb);
+ exfat_error("failed to allocate root node");
+ return -ENOMEM;
+ }
+ memset(ef->root, 0, sizeof(struct exfat_node));
+ ef->root->flags = EXFAT_ATTRIB_DIR;
+ ef->root->start_cluster = le32_to_cpu(ef->sb->rootdir_cluster);
+ ef->root->fptr_cluster = ef->root->start_cluster;
+ ef->root->name[0] = cpu_to_le16('\0');
+ ef->root->size = rootdir_size(ef);
+ /* exFAT does not have time attributes for the root directory */
+ ef->root->mtime = 0;
+ ef->root->atime = 0;
+ /* always keep at least 1 reference to the root node */
+ exfat_get_node(ef->root);
+
+ rc = exfat_cache_directory(ef, ef->root);
+ if (rc != 0)
+ goto error;
+ if (ef->upcase == NULL)
+ {
+ exfat_error("upcase table is not found");
+ goto error;
+ }
+ if (ef->cmap.chunk == NULL)
+ {
+ exfat_error("clusters bitmap is not found");
+ goto error;
+ }
+
+ return 0;
+
+error:
+ exfat_put_node(ef, ef->root);
+ exfat_reset_cache(ef);
+ free(ef->root);
+ free(ef->zero_sector);
+ close(ef->fd);
+ free(ef->sb);
+ return -EIO;
+}
+
+void exfat_unmount(struct exfat* ef)
+{
+ exfat_put_node(ef, ef->root);
+ exfat_reset_cache(ef);
+ free(ef->root);
+ ef->root = NULL;
+ free(ef->zero_sector);
+ ef->zero_sector = NULL;
+ free(ef->cmap.chunk);
+ ef->cmap.chunk = NULL;
+ if (fsync(ef->fd) < 0)
+ exfat_error("fsync failed");
+ if (close(ef->fd) < 0)
+ exfat_error("close failed");
+ ef->fd = 0;
+ free(ef->sb);
+ ef->sb = NULL;
+ free(ef->upcase);
+ ef->upcase = NULL;
+ ef->upcase_chars = 0;
+}
--- /dev/null
+/*
+ node.c (09.10.09)
+ exFAT file system implementation library.
+
+ Copyright (C) 2009, 2010 Andrew Nayenko
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "exfat.h"
+#include <errno.h>
+#include <string.h>
+#include <inttypes.h>
+
+/* on-disk nodes iterator */
+struct iterator
+{
+ cluster_t cluster;
+ off_t offset;
+ int contiguous;
+ char* chunk;
+};
+
+struct exfat_node* exfat_get_node(struct exfat_node* node)
+{
+ /* if we switch to multi-threaded mode we will need atomic
+ increment here and atomic decrement in exfat_put_node() */
+ node->references++;
+ return node;
+}
+
+void exfat_put_node(struct exfat* ef, struct exfat_node* node)
+{
+ if (--node->references < 0)
+ {
+ char buffer[EXFAT_NAME_MAX + 1];
+ exfat_get_name(node, buffer, EXFAT_NAME_MAX);
+ exfat_bug("reference counter of `%s' is below zero", buffer);
+ }
+
+ if (node->references == 0)
+ {
+ if (node->flags & EXFAT_ATTRIB_DIRTY)
+ exfat_flush_node(ef, node);
+ if (node->flags & EXFAT_ATTRIB_UNLINKED)
+ {
+ /* free all clusters and node structure itself */
+ exfat_truncate(ef, node, 0);
+ free(node);
+ }
+ if (ef->cmap.dirty)
+ exfat_flush_cmap(ef);
+ }
+}
+
+/**
+ * Cluster + offset from the beginning of the directory to absolute offset.
+ */
+static off_t co2o(struct exfat* ef, cluster_t cluster, off_t offset)
+{
+ return exfat_c2o(ef, cluster) + offset % CLUSTER_SIZE(*ef->sb);
+}
+
+static int opendir(struct exfat* ef, const struct exfat_node* dir,
+ struct iterator* it)
+{
+ if (!(dir->flags & EXFAT_ATTRIB_DIR))
+ exfat_bug("not a directory");
+ it->cluster = dir->start_cluster;
+ it->offset = 0;
+ it->contiguous = IS_CONTIGUOUS(*dir);
+ it->chunk = malloc(CLUSTER_SIZE(*ef->sb));
+ if (it->chunk == NULL)
+ {
+ exfat_error("out of memory");
+ return -ENOMEM;
+ }
+ exfat_read_raw(it->chunk, CLUSTER_SIZE(*ef->sb),
+ exfat_c2o(ef, it->cluster), ef->fd);
+ return 0;
+}
+
+static void closedir(struct iterator* it)
+{
+ it->cluster = 0;
+ it->offset = 0;
+ it->contiguous = 0;
+ free(it->chunk);
+ it->chunk = NULL;
+}
+
+static int fetch_next_entry(struct exfat* ef, const struct exfat_node* parent,
+ struct iterator* it)
+{
+ /* move iterator to the next entry in the directory */
+ it->offset += sizeof(struct exfat_entry);
+ /* fetch the next cluster if needed */
+ if ((it->offset & (CLUSTER_SIZE(*ef->sb) - 1)) == 0)
+ {
+ it->cluster = exfat_next_cluster(ef, parent, it->cluster);
+ if (CLUSTER_INVALID(it->cluster))
+ {
+ exfat_error("invalid cluster while reading directory");
+ return 1;
+ }
+ exfat_read_raw(it->chunk, CLUSTER_SIZE(*ef->sb),
+ exfat_c2o(ef, it->cluster), ef->fd);
+ }
+ return 0;
+}
+
+static struct exfat_node* allocate_node(void)
+{
+ struct exfat_node* node = malloc(sizeof(struct exfat_node));
+ if (node == NULL)
+ {
+ exfat_error("failed to allocate node");
+ return NULL;
+ }
+ memset(node, 0, sizeof(struct exfat_node));
+ return node;
+}
+
+static void init_node_meta1(struct exfat_node* node,
+ const struct exfat_entry_meta1* meta1)
+{
+ node->flags = le16_to_cpu(meta1->attrib);
+ node->mtime = exfat_exfat2unix(meta1->mdate, meta1->mtime,
+ meta1->mtime_cs);
+ /* there is no centiseconds field for atime */
+ node->atime = exfat_exfat2unix(meta1->adate, meta1->atime, 0);
+}
+
+static void init_node_meta2(struct exfat_node* node,
+ const struct exfat_entry_meta2* meta2)
+{
+ node->size = le64_to_cpu(meta2->size);
+ node->start_cluster = le32_to_cpu(meta2->start_cluster);
+ node->fptr_cluster = node->start_cluster;
+ if (meta2->flags & EXFAT_FLAG_CONTIGUOUS)
+ node->flags |= EXFAT_ATTRIB_CONTIGUOUS;
+}
+
+static const struct exfat_entry* get_entry_ptr(const struct exfat* ef,
+ const struct iterator* it)
+{
+ return (const struct exfat_entry*)
+ (it->chunk + it->offset % CLUSTER_SIZE(*ef->sb));
+}
+
+/*
+ * Reads one entry in directory at position pointed by iterator and fills
+ * node structure.
+ */
+static int readdir(struct exfat* ef, const struct exfat_node* parent,
+ struct exfat_node** node, struct iterator* it)
+{
+ const struct exfat_entry* entry;
+ const struct exfat_entry_meta1* meta1;
+ const struct exfat_entry_meta2* meta2;
+ const struct exfat_entry_name* file_name;
+ const struct exfat_entry_upcase* upcase;
+ const struct exfat_entry_bitmap* bitmap;
+ const struct exfat_entry_label* label;
+ uint8_t continuations = 0;
+ le16_t* namep = NULL;
+ uint16_t reference_checksum = 0;
+ uint16_t actual_checksum = 0;
+
+ *node = NULL;
+
+ for (;;)
+ {
+ /* every directory (even empty one) occupies at least one cluster and
+ must contain EOD entry */
+ entry = get_entry_ptr(ef, it);
+
+ switch (entry->type)
+ {
+ case EXFAT_ENTRY_EOD:
+ if (continuations != 0)
+ {
+ exfat_error("expected %hhu continuations before EOD",
+ continuations);
+ goto error;
+ }
+ return -ENOENT; /* that's OK, means end of directory */
+
+ case EXFAT_ENTRY_FILE:
+ if (continuations != 0)
+ {
+ exfat_error("expected %hhu continuations before new entry",
+ continuations);
+ goto error;
+ }
+ meta1 = (const struct exfat_entry_meta1*) entry;
+ continuations = meta1->continuations;
+ /* each file entry must have at least 2 continuations:
+ info and name */
+ if (continuations < 2)
+ {
+ exfat_error("too few continuations (%hhu)", continuations);
+ return -EIO;
+ }
+ reference_checksum = le16_to_cpu(meta1->checksum);
+ actual_checksum = exfat_start_checksum(meta1);
+ *node = allocate_node();
+ if (*node == NULL)
+ return -ENOMEM;
+ /* new node has zero reference counter */
+ (*node)->entry_cluster = it->cluster;
+ (*node)->entry_offset = it->offset;
+ init_node_meta1(*node, meta1);
+ namep = (*node)->name;
+ break;
+
+ case EXFAT_ENTRY_FILE_INFO:
+ if (continuations < 2)
+ {
+ exfat_error("unexpected continuation (%hhu)",
+ continuations);
+ goto error;
+ }
+ meta2 = (const struct exfat_entry_meta2*) entry;
+ if (meta2->flags & ~(EXFAT_FLAG_ALWAYS1 | EXFAT_FLAG_CONTIGUOUS))
+ {
+ exfat_error("unknown flags in meta2 (0x%hhx)", meta2->flags);
+ goto error;
+ }
+ init_node_meta2(*node, meta2);
+ actual_checksum = exfat_add_checksum(entry, actual_checksum);
+ /* There are two fields that contain file size. Maybe they plan
+ to add compression support in the future and one of those
+ fields is visible (uncompressed) size and the other is real
+ (compressed) size. Anyway, currently it looks like exFAT does
+ not support compression and both fields must be equal. */
+ if (le64_to_cpu(meta2->real_size) != (*node)->size)
+ {
+ exfat_error("real size does not equal to size "
+ "(%"PRIu64" != %"PRIu64")",
+ le64_to_cpu(meta2->real_size), (*node)->size);
+ goto error;
+ }
+ /* empty files must be marked as non-contiguous */
+ if ((*node)->size == 0 && (meta2->flags & EXFAT_FLAG_CONTIGUOUS))
+ {
+ exfat_error("empty file marked as contiguous (0x%hhx)",
+ meta2->flags);
+ goto error;
+ }
+ /* directories must be aligned on at cluster boundary */
+ if (((*node)->flags & EXFAT_ATTRIB_DIR) &&
+ (*node)->size % CLUSTER_SIZE(*ef->sb) != 0)
+ {
+ char buffer[EXFAT_NAME_MAX + 1];
+
+ exfat_get_name(*node, buffer, EXFAT_NAME_MAX);
+ exfat_error("directory `%s' has invalid size %"PRIu64" bytes",
+ buffer, (*node)->size);
+ goto error;
+ }
+ --continuations;
+ break;
+
+ case EXFAT_ENTRY_FILE_NAME:
+ if (continuations == 0)
+ {
+ exfat_error("unexpected continuation");
+ goto error;
+ }
+ file_name = (const struct exfat_entry_name*) entry;
+ actual_checksum = exfat_add_checksum(entry, actual_checksum);
+
+ memcpy(namep, file_name->name, EXFAT_ENAME_MAX * sizeof(le16_t));
+ namep += EXFAT_ENAME_MAX;
+ if (--continuations == 0)
+ {
+ if (actual_checksum != reference_checksum)
+ {
+ exfat_error("invalid checksum (0x%hx != 0x%hx)",
+ actual_checksum, reference_checksum);
+ return -EIO;
+ }
+ if (fetch_next_entry(ef, parent, it) != 0)
+ goto error;
+ return 0; /* entry completed */
+ }
+ break;
+
+ case EXFAT_ENTRY_UPCASE:
+ if (ef->upcase != NULL)
+ break;
+ upcase = (const struct exfat_entry_upcase*) entry;
+ if (CLUSTER_INVALID(le32_to_cpu(upcase->start_cluster)))
+ {
+ exfat_error("invalid cluster in upcase table");
+ return -EIO;
+ }
+ if (le64_to_cpu(upcase->size) == 0 ||
+ le64_to_cpu(upcase->size) > 0xffff * sizeof(uint16_t) ||
+ le64_to_cpu(upcase->size) % sizeof(uint16_t) != 0)
+ {
+ exfat_error("bad upcase table size (%"PRIu64" bytes)",
+ le64_to_cpu(upcase->size));
+ return -EIO;
+ }
+ ef->upcase = malloc(le64_to_cpu(upcase->size));
+ if (ef->upcase == NULL)
+ {
+ exfat_error("failed to allocate upcase table (%"PRIu64" bytes)",
+ le64_to_cpu(upcase->size));
+ return -ENOMEM;
+ }
+ ef->upcase_chars = le64_to_cpu(upcase->size) / sizeof(le16_t);
+
+ exfat_read_raw(ef->upcase, le64_to_cpu(upcase->size),
+ exfat_c2o(ef, le32_to_cpu(upcase->start_cluster)), ef->fd);
+ break;
+
+ case EXFAT_ENTRY_BITMAP:
+ bitmap = (const struct exfat_entry_bitmap*) entry;
+ if (CLUSTER_INVALID(le32_to_cpu(bitmap->start_cluster)))
+ {
+ exfat_error("invalid cluster in clusters bitmap");
+ return -EIO;
+ }
+ ef->cmap.size = le32_to_cpu(ef->sb->cluster_count) -
+ EXFAT_FIRST_DATA_CLUSTER;
+ if (le64_to_cpu(bitmap->size) < (ef->cmap.size + 7) / 8)
+ {
+ exfat_error("invalid clusters bitmap size: %"PRIu64
+ " (expected at least %u)",
+ le64_to_cpu(bitmap->size), (ef->cmap.size + 7) / 8);
+ return -EIO;
+ }
+ ef->cmap.start_cluster = le32_to_cpu(bitmap->start_cluster);
+ /* FIXME bitmap can be rather big, up to 512 MB */
+ ef->cmap.chunk_size = ef->cmap.size;
+ ef->cmap.chunk = malloc(le64_to_cpu(bitmap->size));
+ if (ef->cmap.chunk == NULL)
+ {
+ exfat_error("failed to allocate clusters bitmap chunk "
+ "(%"PRIu64" bytes)", le64_to_cpu(bitmap->size));
+ return -ENOMEM;
+ }
+
+ exfat_read_raw(ef->cmap.chunk, le64_to_cpu(bitmap->size),
+ exfat_c2o(ef, ef->cmap.start_cluster), ef->fd);
+ break;
+
+ case EXFAT_ENTRY_LABEL:
+ label = (const struct exfat_entry_label*) entry;
+ if (label->length > EXFAT_ENAME_MAX)
+ {
+ exfat_error("too long label (%hhu chars)", label->length);
+ return -EIO;
+ }
+ if (utf16_to_utf8(ef->label, label->name,
+ sizeof(ef->label), EXFAT_ENAME_MAX) != 0)
+ return -EIO;
+ break;
+
+ default:
+ if (entry->type & EXFAT_ENTRY_VALID)
+ {
+ exfat_error("unknown entry type 0x%hhx", entry->type);
+ goto error;
+ }
+ break;
+ }
+
+ if (fetch_next_entry(ef, parent, it) != 0)
+ goto error;
+ }
+ /* we never reach here */
+
+error:
+ free(*node);
+ *node = NULL;
+ return -EIO;
+}
+
+int exfat_cache_directory(struct exfat* ef, struct exfat_node* dir)
+{
+ struct iterator it;
+ int rc;
+ struct exfat_node* node;
+ struct exfat_node* current = NULL;
+
+ if (dir->flags & EXFAT_ATTRIB_CACHED)
+ return 0; /* already cached */
+
+ rc = opendir(ef, dir, &it);
+ if (rc != 0)
+ return rc;
+ while ((rc = readdir(ef, dir, &node, &it)) == 0)
+ {
+ node->parent = dir;
+ if (current != NULL)
+ {
+ current->next = node;
+ node->prev = current;
+ }
+ else
+ dir->child = node;
+
+ current = node;
+ }
+ closedir(&it);
+
+ if (rc != -ENOENT)
+ {
+ /* rollback */
+ for (current = dir->child; current; current = node)
+ {
+ node = current->next;
+ free(current);
+ }
+ dir->child = NULL;
+ return rc;
+ }
+
+ dir->flags |= EXFAT_ATTRIB_CACHED;
+ return 0;
+}
+
+static void reset_cache(struct exfat* ef, struct exfat_node* node)
+{
+ struct exfat_node* child;
+ struct exfat_node* next;
+
+ for (child = node->child; child; child = next)
+ {
+ reset_cache(ef, child);
+ next = child->next;
+ free(child);
+ }
+ if (node->references != 0)
+ {
+ char buffer[EXFAT_NAME_MAX + 1];
+ exfat_get_name(node, buffer, EXFAT_NAME_MAX);
+ exfat_warn("non-zero reference counter (%d) for `%s'",
+ node->references, buffer);
+ }
+ while (node->references--)
+ exfat_put_node(ef, node);
+ node->child = NULL;
+ node->flags &= ~EXFAT_ATTRIB_CACHED;
+}
+
+void exfat_reset_cache(struct exfat* ef)
+{
+ reset_cache(ef, ef->root);
+}
+
+void next_entry(struct exfat* ef, const struct exfat_node* parent,
+ cluster_t* cluster, off_t* offset)
+{
+ *offset += sizeof(struct exfat_entry);
+ if (*offset % CLUSTER_SIZE(*ef->sb) == 0)
+ /* next cluster cannot be invalid */
+ *cluster = exfat_next_cluster(ef, parent, *cluster);
+}
+
+void exfat_flush_node(struct exfat* ef, struct exfat_node* node)
+{
+ cluster_t cluster;
+ off_t offset;
+ off_t meta1_offset, meta2_offset;
+ struct exfat_entry_meta1 meta1;
+ struct exfat_entry_meta2 meta2;
+
+ if (ef->ro)
+ exfat_bug("unable to flush node to read-only FS");
+
+ if (node->parent == NULL)
+ return; /* do not flush unlinked node */
+
+ cluster = node->entry_cluster;
+ offset = node->entry_offset;
+ meta1_offset = co2o(ef, cluster, offset);
+ next_entry(ef, node->parent, &cluster, &offset);
+ meta2_offset = co2o(ef, cluster, offset);
+
+ exfat_read_raw(&meta1, sizeof(meta1), meta1_offset, ef->fd);
+ if (meta1.type != EXFAT_ENTRY_FILE)
+ exfat_bug("invalid type of meta1: 0x%hhx", meta1.type);
+ meta1.attrib = cpu_to_le16(node->flags);
+ exfat_unix2exfat(node->mtime, &meta1.mdate, &meta1.mtime, &meta1.mtime_cs);
+ exfat_unix2exfat(node->atime, &meta1.adate, &meta1.atime, NULL);
+
+ exfat_read_raw(&meta2, sizeof(meta2), meta2_offset, ef->fd);
+ if (meta2.type != EXFAT_ENTRY_FILE_INFO)
+ exfat_bug("invalid type of meta2: 0x%hhx", meta2.type);
+ meta2.size = meta2.real_size = cpu_to_le64(node->size);
+ meta2.start_cluster = cpu_to_le32(node->start_cluster);
+ meta2.flags = EXFAT_FLAG_ALWAYS1;
+ /* empty files must not be marked as contiguous */
+ if (node->size != 0 && IS_CONTIGUOUS(*node))
+ meta2.flags |= EXFAT_FLAG_CONTIGUOUS;
+ /* name hash remains unchanged, no need to recalculate it */
+
+ meta1.checksum = exfat_calc_checksum(&meta1, &meta2, node->name);
+
+ exfat_write_raw(&meta1, sizeof(meta1), meta1_offset, ef->fd);
+ exfat_write_raw(&meta2, sizeof(meta2), meta2_offset, ef->fd);
+
+ node->flags &= ~EXFAT_ATTRIB_DIRTY;
+}
+
+static void erase_entry(struct exfat* ef, struct exfat_node* node)
+{
+ cluster_t cluster = node->entry_cluster;
+ off_t offset = node->entry_offset;
+ int name_entries = DIV_ROUND_UP(utf16_length(node->name), EXFAT_ENAME_MAX);
+ uint8_t entry_type;
+
+ entry_type = EXFAT_ENTRY_FILE & ~EXFAT_ENTRY_VALID;
+ exfat_write_raw(&entry_type, 1, co2o(ef, cluster, offset), ef->fd);
+
+ next_entry(ef, node->parent, &cluster, &offset);
+ entry_type = EXFAT_ENTRY_FILE_INFO & ~EXFAT_ENTRY_VALID;
+ exfat_write_raw(&entry_type, 1, co2o(ef, cluster, offset), ef->fd);
+
+ while (name_entries--)
+ {
+ next_entry(ef, node->parent, &cluster, &offset);
+ entry_type = EXFAT_ENTRY_FILE_NAME & ~EXFAT_ENTRY_VALID;
+ exfat_write_raw(&entry_type, 1, co2o(ef, cluster, offset), ef->fd);
+ }
+}
+
+static void tree_detach(struct exfat_node* node)
+{
+ if (node->prev)
+ node->prev->next = node->next;
+ else /* this is the first node in the list */
+ node->parent->child = node->next;
+ if (node->next)
+ node->next->prev = node->prev;
+ node->parent = NULL;
+ node->prev = NULL;
+ node->next = NULL;
+}
+
+static void tree_attach(struct exfat_node* dir, struct exfat_node* node)
+{
+ node->parent = dir;
+ if (dir->child)
+ {
+ dir->child->prev = node;
+ node->next = dir->child;
+ }
+ dir->child = node;
+}
+
+static int shrink_directory(struct exfat* ef, struct exfat_node* dir,
+ off_t deleted_offset)
+{
+ const struct exfat_node* node;
+ const struct exfat_node* last_node;
+ uint64_t entries = 1; /* a directory always has at leat 1 entry (EOD) */
+ uint64_t new_size;
+ struct exfat_entry eod;
+ off_t eod_offset;
+ int rc;
+
+ if (!(dir->flags & EXFAT_ATTRIB_DIR))
+ exfat_bug("attempted to shrink a file");
+ if (!(dir->flags & EXFAT_ATTRIB_CACHED))
+ exfat_bug("attempted to shrink uncached directory");
+
+ for (last_node = node = dir->child; node; node = node->next)
+ {
+ if (deleted_offset < node->entry_offset)
+ {
+ /* there are other entries after the removed one, no way to shrink
+ this directory */
+ return 0;
+ }
+ if (last_node->entry_offset < node->entry_offset)
+ last_node = node;
+ }
+
+ if (last_node)
+ {
+ /* offset of the last entry */
+ entries += last_node->entry_offset / sizeof(struct exfat_entry);
+ /* two subentries with meta info */
+ entries += 2;
+ /* subentries with file name */
+ entries += DIV_ROUND_UP(utf16_length(last_node->name),
+ EXFAT_ENAME_MAX);
+ }
+
+ new_size = DIV_ROUND_UP(entries * sizeof(struct exfat_entry),
+ CLUSTER_SIZE(*ef->sb)) * CLUSTER_SIZE(*ef->sb);
+ if (new_size == dir->size)
+ return 0;
+ rc = exfat_truncate(ef, dir, new_size);
+ if (rc != 0)
+ return rc;
+
+ /* put EOD entry at the end of the last cluster */
+ memset(&eod, 0, sizeof(eod));
+ eod_offset = new_size - sizeof(struct exfat_entry);
+ if (last_node)
+ exfat_write_raw(&eod, sizeof(eod),
+ co2o(ef, last_node->entry_cluster, eod_offset), ef->fd);
+ else
+ exfat_write_raw(&eod, sizeof(eod),
+ co2o(ef, dir->start_cluster, eod_offset), ef->fd);
+ return 0;
+}
+
+static int delete(struct exfat* ef, struct exfat_node* node)
+{
+ struct exfat_node* parent = node->parent;
+ off_t deleted_offset = node->entry_offset;
+ int rc;
+
+ exfat_get_node(parent);
+ erase_entry(ef, node);
+ exfat_update_mtime(parent);
+ tree_detach(node);
+ rc = shrink_directory(ef, parent, deleted_offset);
+ exfat_put_node(ef, parent);
+ /* file clusters will be freed when node reference counter becomes 0 */
+ node->flags |= EXFAT_ATTRIB_UNLINKED;
+ return rc;
+}
+
+int exfat_unlink(struct exfat* ef, struct exfat_node* node)
+{
+ if (node->flags & EXFAT_ATTRIB_DIR)
+ return -EISDIR;
+ return delete(ef, node);
+}
+
+int exfat_rmdir(struct exfat* ef, struct exfat_node* node)
+{
+ if (!(node->flags & EXFAT_ATTRIB_DIR))
+ return -ENOTDIR;
+ /* check that directory is empty */
+ exfat_cache_directory(ef, node);
+ if (node->child)
+ return -ENOTEMPTY;
+ return delete(ef, node);
+}
+
+static int grow_directory(struct exfat* ef, struct exfat_node* dir,
+ uint64_t asize, uint32_t difference)
+{
+ return exfat_truncate(ef, dir,
+ DIV_ROUND_UP(asize + difference, CLUSTER_SIZE(*ef->sb))
+ * CLUSTER_SIZE(*ef->sb));
+}
+
+static int find_slot(struct exfat* ef, struct exfat_node* dir,
+ cluster_t* cluster, off_t* offset, int subentries)
+{
+ struct iterator it;
+ int rc;
+ const struct exfat_entry* entry;
+ int contiguous = 0;
+
+ rc = opendir(ef, dir, &it);
+ if (rc != 0)
+ return rc;
+ for (;;)
+ {
+ if (contiguous == 0)
+ {
+ *cluster = it.cluster;
+ *offset = it.offset;
+ }
+ entry = get_entry_ptr(ef, &it);
+ if (entry->type == EXFAT_ENTRY_EOD)
+ {
+ rc = grow_directory(ef, dir,
+ it.offset + sizeof(struct exfat_entry), /* actual size */
+ (subentries - contiguous) * sizeof(struct exfat_entry));
+ if (rc != 0)
+ {
+ closedir(&it);
+ return rc;
+ }
+ break;
+ }
+ if (entry->type & EXFAT_ENTRY_VALID)
+ contiguous = 0;
+ else
+ contiguous++;
+ if (contiguous == subentries)
+ break; /* suitable slot is found */
+ if (fetch_next_entry(ef, dir, &it) != 0)
+ {
+ closedir(&it);
+ return -EIO;
+ }
+ }
+ closedir(&it);
+ return 0;
+}
+
+static int write_entry(struct exfat* ef, struct exfat_node* dir,
+ const le16_t* name, cluster_t cluster, off_t offset, uint16_t attrib)
+{
+ struct exfat_node* node;
+ struct exfat_entry_meta1 meta1;
+ struct exfat_entry_meta2 meta2;
+ const size_t name_length = utf16_length(name);
+ const int name_entries = DIV_ROUND_UP(name_length, EXFAT_ENAME_MAX);
+ int i;
+
+ node = allocate_node();
+ if (node == NULL)
+ return -ENOMEM;
+ node->entry_cluster = cluster;
+ node->entry_offset = offset;
+ memcpy(node->name, name, name_length * sizeof(le16_t));
+
+ memset(&meta1, 0, sizeof(meta1));
+ meta1.type = EXFAT_ENTRY_FILE;
+ meta1.continuations = 1 + name_entries;
+ meta1.attrib = cpu_to_le16(attrib);
+ exfat_unix2exfat(time(NULL), &meta1.crdate, &meta1.crtime,
+ &meta1.crtime_cs);
+ meta1.adate = meta1.mdate = meta1.crdate;
+ meta1.atime = meta1.mtime = meta1.crtime;
+ /* crtime_cs and mtime_cs contain addition to the time in centiseconds;
+ just ignore those fields because we operate with 2 sec resolution */
+
+ memset(&meta2, 0, sizeof(meta2));
+ meta2.type = EXFAT_ENTRY_FILE_INFO;
+ meta2.flags = EXFAT_FLAG_ALWAYS1;
+ meta2.name_length = name_length;
+ meta2.name_hash = exfat_calc_name_hash(ef, node->name);
+ meta2.start_cluster = cpu_to_le32(EXFAT_CLUSTER_FREE);
+
+ meta1.checksum = exfat_calc_checksum(&meta1, &meta2, node->name);
+
+ exfat_write_raw(&meta1, sizeof(meta1), co2o(ef, cluster, offset), ef->fd);
+ next_entry(ef, dir, &cluster, &offset);
+ exfat_write_raw(&meta2, sizeof(meta2), co2o(ef, cluster, offset), ef->fd);
+ for (i = 0; i < name_entries; i++)
+ {
+ struct exfat_entry_name name_entry = {EXFAT_ENTRY_FILE_NAME, 0};
+ memcpy(name_entry.name, node->name + i * EXFAT_ENAME_MAX,
+ EXFAT_ENAME_MAX * sizeof(le16_t));
+ next_entry(ef, dir, &cluster, &offset);
+ exfat_write_raw(&name_entry, sizeof(name_entry),
+ co2o(ef, cluster, offset), ef->fd);
+ }
+
+ init_node_meta1(node, &meta1);
+ init_node_meta2(node, &meta2);
+
+ tree_attach(dir, node);
+ exfat_update_mtime(dir);
+ return 0;
+}
+
+static int create(struct exfat* ef, const char* path, uint16_t attrib)
+{
+ struct exfat_node* dir;
+ struct exfat_node* existing;
+ cluster_t cluster = EXFAT_CLUSTER_BAD;
+ off_t offset = -1;
+ le16_t name[EXFAT_NAME_MAX + 1];
+ int rc;
+
+ rc = exfat_split(ef, &dir, &existing, name, path);
+ if (rc != 0)
+ return rc;
+ if (existing != NULL)
+ {
+ exfat_put_node(ef, existing);
+ exfat_put_node(ef, dir);
+ return -EEXIST;
+ }
+
+ rc = find_slot(ef, dir, &cluster, &offset,
+ 2 + DIV_ROUND_UP(utf16_length(name), EXFAT_ENAME_MAX));
+ if (rc != 0)
+ {
+ exfat_put_node(ef, dir);
+ return rc;
+ }
+ rc = write_entry(ef, dir, name, cluster, offset, attrib);
+ exfat_put_node(ef, dir);
+ return rc;
+}
+
+int exfat_mknod(struct exfat* ef, const char* path)
+{
+ return create(ef, path, EXFAT_ATTRIB_ARCH);
+}
+
+int exfat_mkdir(struct exfat* ef, const char* path)
+{
+ int rc;
+ struct exfat_node* node;
+
+ rc = create(ef, path, EXFAT_ATTRIB_ARCH | EXFAT_ATTRIB_DIR);
+ if (rc != 0)
+ return rc;
+ rc = exfat_lookup(ef, &node, path);
+ if (rc != 0)
+ return 0;
+ /* directories always have at least one cluster */
+ rc = exfat_truncate(ef, node, CLUSTER_SIZE(*ef->sb));
+ if (rc != 0)
+ {
+ delete(ef, node);
+ exfat_put_node(ef, node);
+ return rc;
+ }
+ exfat_put_node(ef, node);
+ return 0;
+}
+
+static void rename_entry(struct exfat* ef, struct exfat_node* dir,
+ struct exfat_node* node, const le16_t* name, cluster_t new_cluster,
+ off_t new_offset)
+{
+ struct exfat_entry_meta1 meta1;
+ struct exfat_entry_meta2 meta2;
+ cluster_t old_cluster = node->entry_cluster;
+ off_t old_offset = node->entry_offset;
+ const size_t name_length = utf16_length(name);
+ const int name_entries = DIV_ROUND_UP(name_length, EXFAT_ENAME_MAX);
+ int i;
+
+ exfat_read_raw(&meta1, sizeof(meta1), co2o(ef, old_cluster, old_offset),
+ ef->fd);
+ next_entry(ef, node->parent, &old_cluster, &old_offset);
+ exfat_read_raw(&meta2, sizeof(meta2), co2o(ef, old_cluster, old_offset),
+ ef->fd);
+ meta1.continuations = 1 + name_entries;
+ meta2.name_hash = exfat_calc_name_hash(ef, name);
+ meta2.name_length = name_length;
+ meta1.checksum = exfat_calc_checksum(&meta1, &meta2, name);
+
+ erase_entry(ef, node);
+
+ node->entry_cluster = new_cluster;
+ node->entry_offset = new_offset;
+
+ exfat_write_raw(&meta1, sizeof(meta1), co2o(ef, new_cluster, new_offset),
+ ef->fd);
+ next_entry(ef, dir, &new_cluster, &new_offset);
+ exfat_write_raw(&meta2, sizeof(meta2), co2o(ef, new_cluster, new_offset),
+ ef->fd);
+
+ for (i = 0; i < name_entries; i++)
+ {
+ struct exfat_entry_name name_entry = {EXFAT_ENTRY_FILE_NAME, 0};
+ memcpy(name_entry.name, name + i * EXFAT_ENAME_MAX,
+ EXFAT_ENAME_MAX * sizeof(le16_t));
+ next_entry(ef, dir, &new_cluster, &new_offset);
+ exfat_write_raw(&name_entry, sizeof(name_entry),
+ co2o(ef, new_cluster, new_offset), ef->fd);
+ }
+
+ memcpy(node->name, name, (EXFAT_NAME_MAX + 1) * sizeof(le16_t));
+ tree_detach(node);
+ tree_attach(dir, node);
+}
+
+int exfat_rename(struct exfat* ef, const char* old_path, const char* new_path)
+{
+ struct exfat_node* node;
+ struct exfat_node* existing;
+ struct exfat_node* dir;
+ cluster_t cluster = EXFAT_CLUSTER_BAD;
+ off_t offset = -1;
+ le16_t name[EXFAT_NAME_MAX + 1];
+ int rc;
+
+ rc = exfat_lookup(ef, &node, old_path);
+ if (rc != 0)
+ return rc;
+
+ rc = exfat_split(ef, &dir, &existing, name, new_path);
+ if (rc != 0)
+ {
+ exfat_put_node(ef, node);
+ return rc;
+ }
+ if (existing != NULL)
+ {
+ if (existing->flags & EXFAT_ATTRIB_DIR)
+ {
+ if (node->flags & EXFAT_ATTRIB_DIR)
+ rc = exfat_rmdir(ef, existing);
+ else
+ rc = -ENOTDIR;
+ }
+ else
+ {
+ if (!(node->flags & EXFAT_ATTRIB_DIR))
+ rc = exfat_unlink(ef, existing);
+ else
+ rc = -EISDIR;
+ }
+ exfat_put_node(ef, existing);
+ if (rc != 0)
+ {
+ exfat_put_node(ef, dir);
+ exfat_put_node(ef, node);
+ return rc;
+ }
+ }
+
+ rc = find_slot(ef, dir, &cluster, &offset,
+ 2 + DIV_ROUND_UP(utf16_length(name), EXFAT_ENAME_MAX));
+ if (rc != 0)
+ {
+ exfat_put_node(ef, dir);
+ exfat_put_node(ef, node);
+ return rc;
+ }
+ rename_entry(ef, dir, node, name, cluster, offset);
+ exfat_put_node(ef, dir);
+ exfat_put_node(ef, node);
+ return 0;
+}
+
+void exfat_utimes(struct exfat_node* node, const struct timespec tv[2])
+{
+ node->atime = tv[0].tv_sec;
+ node->mtime = tv[1].tv_sec;
+ node->flags |= EXFAT_ATTRIB_DIRTY;
+}
+
+void exfat_update_atime(struct exfat_node* node)
+{
+ node->atime = time(NULL);
+ node->flags |= EXFAT_ATTRIB_DIRTY;
+}
+
+void exfat_update_mtime(struct exfat_node* node)
+{
+ node->mtime = time(NULL);
+ node->flags |= EXFAT_ATTRIB_DIRTY;
+}
+
+const char* exfat_get_label(struct exfat* ef)
+{
+ return ef->label;
+}
+
+static int find_label(struct exfat* ef, cluster_t* cluster, off_t* offset)
+{
+ struct iterator it;
+ int rc;
+ const struct exfat_entry* entry;
+
+ rc = opendir(ef, ef->root, &it);
+ if (rc != 0)
+ return rc;
+
+ for (;;)
+ {
+ entry = get_entry_ptr(ef, &it);
+
+ if (entry->type == EXFAT_ENTRY_EOD)
+ {
+ closedir(&it);
+ return -ENOENT;
+ }
+ if (entry->type == EXFAT_ENTRY_LABEL)
+ {
+ *cluster = it.cluster;
+ *offset = it.offset;
+ closedir(&it);
+ return 0;
+ }
+
+ if (fetch_next_entry(ef, ef->root, &it) != 0)
+ {
+ closedir(&it);
+ return -EIO;
+ }
+ }
+}
+
+int exfat_set_label(struct exfat* ef, const char* label)
+{
+ le16_t label_utf16[EXFAT_ENAME_MAX + 1];
+ int rc;
+ cluster_t cluster;
+ off_t offset;
+ struct exfat_entry_label entry;
+
+ memset(label_utf16, 0, sizeof(label_utf16));
+ rc = utf8_to_utf16(label_utf16, label, EXFAT_ENAME_MAX, strlen(label));
+ if (rc != 0)
+ return rc;
+
+ rc = find_label(ef, &cluster, &offset);
+ if (rc == -ENOENT)
+ rc = find_slot(ef, ef->root, &cluster, &offset, 1);
+ if (rc != 0)
+ return rc;
+
+ entry.type = EXFAT_ENTRY_LABEL;
+ entry.length = utf16_length(label_utf16);
+ memcpy(entry.name, label_utf16, sizeof(entry.name));
+ if (entry.length == 0)
+ entry.type ^= EXFAT_ENTRY_VALID;
+
+ exfat_write_raw(&entry, sizeof(struct exfat_entry_label),
+ co2o(ef, cluster, offset), ef->fd);
+ return 0;
+}
--- /dev/null
+/*
+ utf.c (13.09.09)
+ exFAT file system implementation library.
+
+ Copyright (C) 2009, 2010 Andrew Nayenko
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "exfat.h"
+#include <errno.h>
+
+static char* wchar_to_utf8(char* output, wchar_t wc, size_t outsize)
+{
+ if (wc <= 0x7f)
+ {
+ if (outsize < 1)
+ return NULL;
+ *output++ = (char) wc;
+ }
+ else if (wc <= 0x7ff)
+ {
+ if (outsize < 2)
+ return NULL;
+ *output++ = 0xc0 | (wc >> 6);
+ *output++ = 0x80 | (wc & 0x3f);
+ }
+ else if (wc <= 0xffff)
+ {
+ if (outsize < 3)
+ return NULL;
+ *output++ = 0xe0 | (wc >> 12);
+ *output++ = 0x80 | ((wc >> 6) & 0x3f);
+ *output++ = 0x80 | (wc & 0x3f);
+ }
+ else if (wc <= 0x1fffff)
+ {
+ if (outsize < 4)
+ return NULL;
+ *output++ = 0xf0 | (wc >> 18);
+ *output++ = 0x80 | ((wc >> 12) & 0x3f);
+ *output++ = 0x80 | ((wc >> 6) & 0x3f);
+ *output++ = 0x80 | (wc & 0x3f);
+ }
+ else if (wc <= 0x3ffffff)
+ {
+ if (outsize < 5)
+ return NULL;
+ *output++ = 0xf8 | (wc >> 24);
+ *output++ = 0x80 | ((wc >> 18) & 0x3f);
+ *output++ = 0x80 | ((wc >> 12) & 0x3f);
+ *output++ = 0x80 | ((wc >> 6) & 0x3f);
+ *output++ = 0x80 | (wc & 0x3f);
+ }
+ else if (wc <= 0x7fffffff)
+ {
+ if (outsize < 6)
+ return NULL;
+ *output++ = 0xfc | (wc >> 30);
+ *output++ = 0x80 | ((wc >> 24) & 0x3f);
+ *output++ = 0x80 | ((wc >> 18) & 0x3f);
+ *output++ = 0x80 | ((wc >> 12) & 0x3f);
+ *output++ = 0x80 | ((wc >> 6) & 0x3f);
+ *output++ = 0x80 | (wc & 0x3f);
+ }
+ else
+ return NULL;
+
+ return output;
+}
+
+static const le16_t* utf16_to_wchar(const le16_t* input, wchar_t* wc,
+ size_t insize)
+{
+ if ((le16_to_cpu(input[0]) & 0xfc00) == 0xd800)
+ {
+ if (insize < 2 || (le16_to_cpu(input[1]) & 0xfc00) != 0xdc00)
+ return NULL;
+ *wc = ((wchar_t) (le16_to_cpu(input[0]) & 0x3ff) << 10);
+ *wc |= (le16_to_cpu(input[1]) & 0x3ff);
+ return input + 2;
+ }
+ else
+ {
+ *wc = le16_to_cpu(*input);
+ return input + 1;
+ }
+}
+
+int utf16_to_utf8(char* output, const le16_t* input, size_t outsize,
+ size_t insize)
+{
+ const le16_t* inp = input;
+ char* outp = output;
+ wchar_t wc;
+
+ while (inp - input < insize && le16_to_cpu(*inp))
+ {
+ inp = utf16_to_wchar(inp, &wc, insize - (inp - input));
+ if (inp == NULL)
+ {
+ exfat_error("illegal UTF-16 sequence");
+ return -EILSEQ;
+ }
+ outp = wchar_to_utf8(outp, wc, outsize - (outp - output));
+ if (outp == NULL)
+ {
+ exfat_error("name is too long");
+ return -ENAMETOOLONG;
+ }
+ }
+ *outp = '\0';
+ return 0;
+}
+
+static const char* utf8_to_wchar(const char* input, wchar_t* wc,
+ size_t insize)
+{
+ if ((input[0] & 0x80) == 0 && insize >= 1)
+ {
+ *wc = (wchar_t) input[0];
+ return input + 1;
+ }
+ if ((input[0] & 0xe0) == 0xc0 && insize >= 2)
+ {
+ *wc = (((wchar_t) input[0] & 0x1f) << 6) |
+ ((wchar_t) input[1] & 0x3f);
+ return input + 2;
+ }
+ if ((input[0] & 0xf0) == 0xe0 && insize >= 3)
+ {
+ *wc = (((wchar_t) input[0] & 0x0f) << 12) |
+ (((wchar_t) input[1] & 0x3f) << 6) |
+ ((wchar_t) input[2] & 0x3f);
+ return input + 3;
+ }
+ if ((input[0] & 0xf8) == 0xf0 && insize >= 4)
+ {
+ *wc = (((wchar_t) input[0] & 0x07) << 18) |
+ (((wchar_t) input[1] & 0x3f) << 12) |
+ (((wchar_t) input[2] & 0x3f) << 6) |
+ ((wchar_t) input[3] & 0x3f);
+ return input + 4;
+ }
+ if ((input[0] & 0xfc) == 0xf8 && insize >= 5)
+ {
+ *wc = (((wchar_t) input[0] & 0x03) << 24) |
+ (((wchar_t) input[1] & 0x3f) << 18) |
+ (((wchar_t) input[2] & 0x3f) << 12) |
+ (((wchar_t) input[3] & 0x3f) << 6) |
+ ((wchar_t) input[4] & 0x3f);
+ return input + 5;
+ }
+ if ((input[0] & 0xfe) == 0xfc && insize >= 6)
+ {
+ *wc = (((wchar_t) input[0] & 0x01) << 30) |
+ (((wchar_t) input[1] & 0x3f) << 24) |
+ (((wchar_t) input[2] & 0x3f) << 18) |
+ (((wchar_t) input[3] & 0x3f) << 12) |
+ (((wchar_t) input[4] & 0x3f) << 6) |
+ ((wchar_t) input[5] & 0x3f);
+ return input + 6;
+ }
+ return NULL;
+}
+
+static le16_t* wchar_to_utf16(le16_t* output, wchar_t wc, size_t outsize)
+{
+ if (wc <= 0xffff) /* if character is from BMP */
+ {
+ if (outsize == 0)
+ return NULL;
+ output[0] = cpu_to_le16(wc);
+ return output + 1;
+ }
+ if (outsize < 2)
+ return NULL;
+ output[0] = cpu_to_le16(0xd800 | ((wc >> 10) & 0x3ff));
+ output[1] = cpu_to_le16(0xdc00 | (wc & 0x3ff));
+ return output + 2;
+}
+
+int utf8_to_utf16(le16_t* output, const char* input, size_t outsize,
+ size_t insize)
+{
+ const char* inp = input;
+ le16_t* outp = output;
+ wchar_t wc;
+
+ while (inp - input < insize && *inp)
+ {
+ inp = utf8_to_wchar(inp, &wc, insize - (inp - input));
+ if (inp == NULL)
+ {
+ exfat_error("illegal UTF-8 sequence");
+ return -EILSEQ;
+ }
+ outp = wchar_to_utf16(outp, wc, outsize - (outp - output));
+ if (outp == NULL)
+ {
+ exfat_error("name is too long");
+ return -ENAMETOOLONG;
+ }
+ }
+ *outp = cpu_to_le16(0);
+ return 0;
+}
+
+size_t utf16_length(const le16_t* str)
+{
+ size_t i = 0;
+
+ while (le16_to_cpu(str[i]))
+ i++;
+ return i;
+}
--- /dev/null
+/*
+ utils.c (04.09.09)
+ exFAT file system implementation library.
+
+ Copyright (C) 2009, 2010 Andrew Nayenko
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "exfat.h"
+#include <string.h>
+#include <stdio.h>
+#include <inttypes.h>
+#define _XOPEN_SOURCE /* for timezone in Linux */
+#include <time.h>
+
+void exfat_stat(const struct exfat* ef, const struct exfat_node* node,
+ struct stat* stbuf)
+{
+ memset(stbuf, 0, sizeof(struct stat));
+ if (node->flags & EXFAT_ATTRIB_DIR)
+ stbuf->st_mode = S_IFDIR | (0777 & ~ef->dmask);
+ else
+ stbuf->st_mode = S_IFREG | (0777 & ~ef->fmask);
+ stbuf->st_nlink = 1;
+ stbuf->st_uid = ef->uid;
+ stbuf->st_gid = ef->gid;
+ stbuf->st_size = node->size;
+ stbuf->st_blocks = DIV_ROUND_UP(node->size, CLUSTER_SIZE(*ef->sb)) *
+ CLUSTER_SIZE(*ef->sb) / 512;
+ stbuf->st_mtime = node->mtime;
+ stbuf->st_atime = node->atime;
+ stbuf->st_ctime = 0; /* unapplicable */
+}
+
+#define SEC_IN_MIN 60ll
+#define SEC_IN_HOUR (60 * SEC_IN_MIN)
+#define SEC_IN_DAY (24 * SEC_IN_HOUR)
+#define SEC_IN_YEAR (365 * SEC_IN_DAY) /* not leap year */
+/* Unix epoch started at 0:00:00 UTC 1 January 1970 */
+#define UNIX_EPOCH_YEAR 1970
+/* exFAT epoch started at 0:00:00 UTC 1 January 1980 */
+#define EXFAT_EPOCH_YEAR 1980
+/* number of years from Unix epoch to exFAT epoch */
+#define EPOCH_DIFF_YEAR (EXFAT_EPOCH_YEAR - UNIX_EPOCH_YEAR)
+/* number of days from Unix epoch to exFAT epoch (considering leap days) */
+#define EPOCH_DIFF_DAYS (EPOCH_DIFF_YEAR * 365 + EPOCH_DIFF_YEAR / 4)
+/* number of seconds from Unix epoch to exFAT epoch (considering leap days) */
+#define EPOCH_DIFF_SEC (EPOCH_DIFF_DAYS * SEC_IN_DAY)
+/* number of leap years passed from exFAT epoch to the specified year
+ (excluding the specified year itself) */
+#define LEAP_YEARS(year) ((EXFAT_EPOCH_YEAR + (year) - 1) / 4 \
+ - (EXFAT_EPOCH_YEAR - 1) / 4)
+/* checks whether the specified year is leap */
+#define IS_LEAP_YEAR(year) ((EXFAT_EPOCH_YEAR + (year)) % 4 == 0)
+
+static const time_t days_in_year[] =
+{
+ /* Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec */
+ 0, 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334
+};
+
+time_t exfat_exfat2unix(le16_t date, le16_t time, uint8_t centisec)
+{
+ time_t unix_time = EPOCH_DIFF_SEC;
+ uint16_t ndate = le16_to_cpu(date);
+ uint16_t ntime = le16_to_cpu(time);
+
+ uint16_t day = ndate & 0x1f; /* 5 bits, 1-31 */
+ uint16_t month = ndate >> 5 & 0xf; /* 4 bits, 1-12 */
+ uint16_t year = ndate >> 9; /* 7 bits, 1-127 (+1980) */
+
+ uint16_t twosec = ntime & 0x1f; /* 5 bits, 0-29 (2 sec granularity) */
+ uint16_t min = ntime >> 5 & 0xf; /* 6 bits, 0-59 */
+ uint16_t hour = ntime >> 11; /* 5 bits, 0-23 */
+
+ if (day == 0 || month == 0 || month > 12)
+ {
+ exfat_error("bad date %hu-%02hu-%02hu",
+ year + EXFAT_EPOCH_YEAR, month, day);
+ return 0;
+ }
+ if (hour > 23 || min > 59 || twosec > 29)
+ {
+ exfat_error("bad time %hu:%02hu:%02hu",
+ hour, min, twosec * 2);
+ return 0;
+ }
+ if (centisec > 199)
+ {
+ exfat_error("bad centiseconds count %hhu", centisec);
+ return 0;
+ }
+
+ /* every 4th year between 1904 and 2096 is leap */
+ unix_time += year * SEC_IN_YEAR + LEAP_YEARS(year) * SEC_IN_DAY;
+ unix_time += days_in_year[month] * SEC_IN_DAY;
+ /* if it's leap year and February has passed we should add 1 day */
+ if ((EXFAT_EPOCH_YEAR + year) % 4 == 0 && month > 2)
+ unix_time += SEC_IN_DAY;
+ unix_time += (day - 1) * SEC_IN_DAY;
+
+ unix_time += hour * SEC_IN_HOUR;
+ unix_time += min * SEC_IN_MIN;
+ /* exFAT represents time with 2 sec granularity */
+ unix_time += twosec * 2;
+ unix_time += centisec / 100;
+
+ /* exFAT stores timestamps in local time, so we correct it to UTC */
+ unix_time += timezone;
+
+ return unix_time;
+}
+
+void exfat_unix2exfat(time_t unix_time, le16_t* date, le16_t* time,
+ uint8_t* centisec)
+{
+ time_t shift = EPOCH_DIFF_SEC + timezone;
+ uint16_t day, month, year;
+ uint16_t twosec, min, hour;
+ int days;
+ int i;
+
+ /* time before exFAT epoch cannot be represented */
+ if (unix_time < shift)
+ unix_time = shift;
+
+ unix_time -= shift;
+
+ days = unix_time / SEC_IN_DAY;
+ year = (4 * days) / (4 * 365 + 1);
+ days -= year * 365 + LEAP_YEARS(year);
+ month = 0;
+ for (i = 1; i <= 12; i++)
+ {
+ int leap_day = (IS_LEAP_YEAR(year) && i == 2);
+ int leap_sub = (IS_LEAP_YEAR(year) && i >= 3);
+
+ if (i == 12 || days - leap_sub < days_in_year[i + 1] + leap_day)
+ {
+ month = i;
+ days -= days_in_year[i] + leap_sub;
+ break;
+ }
+ }
+ day = days + 1;
+
+ hour = (unix_time % SEC_IN_DAY) / SEC_IN_HOUR;
+ min = (unix_time % SEC_IN_HOUR) / SEC_IN_MIN;
+ twosec = (unix_time % SEC_IN_MIN) / 2;
+
+ *date = cpu_to_le16(day | (month << 5) | (year << 9));
+ *time = cpu_to_le16(twosec | (min << 5) | (hour << 11));
+ if (centisec)
+ *centisec = (unix_time % 2) * 100;
+}
+
+void exfat_get_name(const struct exfat_node* node, char* buffer, size_t n)
+{
+ if (utf16_to_utf8(buffer, node->name, n, EXFAT_NAME_MAX) != 0)
+ exfat_bug("failed to convert name to UTF-8");
+}
+
+uint16_t exfat_start_checksum(const struct exfat_entry_meta1* entry)
+{
+ uint16_t sum = 0;
+ int i;
+
+ for (i = 0; i < sizeof(struct exfat_entry); i++)
+ if (i != 2 && i != 3) /* skip checksum field itself */
+ sum = ((sum << 15) | (sum >> 1)) + ((const uint8_t*) entry)[i];
+ return sum;
+}
+
+uint16_t exfat_add_checksum(const void* entry, uint16_t sum)
+{
+ int i;
+
+ for (i = 0; i < sizeof(struct exfat_entry); i++)
+ sum = ((sum << 15) | (sum >> 1)) + ((const uint8_t*) entry)[i];
+ return sum;
+}
+
+le16_t exfat_calc_checksum(const struct exfat_entry_meta1* meta1,
+ const struct exfat_entry_meta2* meta2, const le16_t* name)
+{
+ uint16_t checksum;
+ const int name_entries = DIV_ROUND_UP(utf16_length(name), EXFAT_ENAME_MAX);
+ int i;
+
+ checksum = exfat_start_checksum(meta1);
+ checksum = exfat_add_checksum(meta2, checksum);
+ for (i = 0; i < name_entries; i++)
+ {
+ struct exfat_entry_name name_entry = {EXFAT_ENTRY_FILE_NAME, 0};
+ memcpy(name_entry.name, name + i * EXFAT_ENAME_MAX,
+ EXFAT_ENAME_MAX * sizeof(le16_t));
+ checksum = exfat_add_checksum(&name_entry, checksum);
+ }
+ return cpu_to_le16(checksum);
+}
+
+uint32_t exfat_vbr_start_checksum(const void* sector, size_t size)
+{
+ size_t i;
+ uint32_t sum = 0;
+
+ for (i = 0; i < size; i++)
+ /* skip volume_state and allocated_percent fields */
+ if (i != 0x6a && i != 0x6b && i != 0x70)
+ sum = ((sum << 31) | (sum >> 1)) + ((const uint8_t*) sector)[i];
+ return sum;
+}
+
+uint32_t exfat_vbr_add_checksum(const void* sector, size_t size, uint32_t sum)
+{
+ size_t i;
+
+ for (i = 0; i < size; i++)
+ sum = ((sum << 31) | (sum >> 1)) + ((const uint8_t*) sector)[i];
+ return sum;
+}
+
+
+le16_t exfat_calc_name_hash(const struct exfat* ef, const le16_t* name)
+{
+ size_t i;
+ size_t length = utf16_length(name);
+ uint16_t hash = 0;
+
+ for (i = 0; i < length; i++)
+ {
+ uint16_t c = le16_to_cpu(name[i]);
+
+ /* convert to upper case */
+ if (c < ef->upcase_chars)
+ c = le16_to_cpu(ef->upcase[c]);
+
+ hash = ((hash << 15) | (hash >> 1)) + (c & 0xff);
+ hash = ((hash << 15) | (hash >> 1)) + (c >> 8);
+ }
+ return cpu_to_le16(hash);
+}
+
+void exfat_humanize_bytes(uint64_t value, struct exfat_human_bytes* hb)
+{
+ size_t i;
+ const char* units[] = {"bytes", "KB", "MB", "GB", "TB", "PB"};
+ uint64_t divisor = 1;
+
+ for (i = 0; i < sizeof(units) / sizeof(units[0]) - 1; i++)
+ {
+ if ((value + divisor / 2) / divisor < 1024)
+ break;
+ divisor *= 1024;
+ }
+ hb->value = (value + divisor / 2) / divisor;
+ hb->unit = units[i];
+}
+
+void exfat_print_info(const struct exfat_super_block* sb,
+ uint32_t free_clusters)
+{
+ struct exfat_human_bytes hb;
+ off_t total_space = le64_to_cpu(sb->sector_count) * SECTOR_SIZE(*sb);
+ off_t avail_space = (off_t) free_clusters * CLUSTER_SIZE(*sb);
+
+ printf("File system version %hhu.%hhu\n",
+ sb->version.major, sb->version.minor);
+ exfat_humanize_bytes(SECTOR_SIZE(*sb), &hb);
+ printf("Sector size %10"PRIu64" %s\n", hb.value, hb.unit);
+ exfat_humanize_bytes(CLUSTER_SIZE(*sb), &hb);
+ printf("Cluster size %10"PRIu64" %s\n", hb.value, hb.unit);
+ exfat_humanize_bytes(total_space, &hb);
+ printf("Volume size %10"PRIu64" %s\n", hb.value, hb.unit);
+ exfat_humanize_bytes(total_space - avail_space, &hb);
+ printf("Used space %10"PRIu64" %s\n", hb.value, hb.unit);
+ exfat_humanize_bytes(avail_space, &hb);
+ printf("Available space %10"PRIu64" %s\n", hb.value, hb.unit);
+}
--- /dev/null
+/*
+ version.h (12.06.10)
+ Version constants.
+
+ Copyright (C) 2009, 2010 Andrew Nayenko
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef VERSION_H_INCLUDED
+#define VERSION_H_INCLUDED
+
+#define EXFAT_VERSION_MAJOR 0
+#define EXFAT_VERSION_MINOR 9
+#define EXFAT_VERSION_PATCH 5
+
+#endif /* ifndef VERSION_H_INCLUDED */
--- /dev/null
+/*
+ cbm.c (09.11.10)
+ Clusters Bitmap creation code.
+
+ Copyright (C) 2009, 2010 Andrew Nayenko
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <unistd.h>
+#include <limits.h>
+#include <inttypes.h>
+#include <errno.h>
+#include "mkexfat.h"
+#include "uct.h"
+#include "rootdir.h"
+
+off_t cbm_alignment(void)
+{
+ return CLUSTER_SIZE(sb);
+}
+
+off_t cbm_size(void)
+{
+ return DIV_ROUND_UP(le32_to_cpu(sb.cluster_count), CHAR_BIT);
+}
+
+int cbm_write(off_t base, int fd)
+{
+ uint32_t allocated_clusters =
+ DIV_ROUND_UP(cbm_size(), CLUSTER_SIZE(sb)) +
+ DIV_ROUND_UP(uct_size(), CLUSTER_SIZE(sb)) +
+ DIV_ROUND_UP(rootdir_size(), CLUSTER_SIZE(sb));
+ size_t bitmap_size = DIV_ROUND_UP(allocated_clusters, CHAR_BIT);
+ uint8_t* bitmap = malloc(bitmap_size);
+ size_t i;
+
+ if (bitmap == NULL)
+ return errno;
+
+ for (i = 0; i < bitmap_size * CHAR_BIT; i++)
+ if (i < allocated_clusters)
+ BMAP_SET(bitmap, i);
+ else
+ BMAP_CLR(bitmap, i);
+ if (write(fd, bitmap, bitmap_size) == -1)
+ return errno;
+ free(bitmap);
+
+ sb.cluster_sector_start = cpu_to_le32(base / SECTOR_SIZE(sb));
+ bitmap_entry.start_cluster = cpu_to_le32(OFFSET_TO_CLUSTER(base));
+ bitmap_entry.size = cpu_to_le64(cbm_size());
+ return 0;
+}
--- /dev/null
+/*
+ cbm.h (09.11.10)
+ Clusters Bitmap creation code.
+
+ Copyright (C) 2009, 2010 Andrew Nayenko
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef MKFS_CBM_H_INCLUDED
+#define MKFS_CBM_H_INCLUDED
+
+off_t cbm_alignment(void);
+off_t cbm_size(void);
+int cbm_write(off_t base, int fd);
+
+#endif /* ifndef MKFS_CBM_H_INCLUDED */
--- /dev/null
+/*
+ fat.c (09.11.10)
+ File Allocation Table creation code.
+
+ Copyright (C) 2009, 2010 Andrew Nayenko
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <unistd.h>
+#include <inttypes.h>
+#include <errno.h>
+#include "mkexfat.h"
+#include "cbm.h"
+#include "uct.h"
+#include "rootdir.h"
+
+off_t fat_alignment(void)
+{
+ return (off_t) le32_to_cpu(sb.fat_sector_start) * SECTOR_SIZE(sb);
+}
+
+off_t fat_size(void)
+{
+ return (off_t) le32_to_cpu(sb.fat_sector_count) * SECTOR_SIZE(sb);
+}
+
+static cluster_t fat_write_entry(cluster_t cluster, cluster_t value, int fd)
+{
+ le32_t fat_entry = cpu_to_le32(value);
+ if (write(fd, &fat_entry, sizeof(fat_entry)) == -1)
+ return 0;
+ return cluster + 1;
+}
+
+static cluster_t fat_write_entries(cluster_t cluster, uint64_t length, int fd)
+{
+ cluster_t end = cluster + DIV_ROUND_UP(length, CLUSTER_SIZE(sb));
+
+ while (cluster < end - 1)
+ {
+ cluster = fat_write_entry(cluster, cluster + 1, fd);
+ if (cluster == 0)
+ return 0;
+ }
+ return fat_write_entry(cluster, EXFAT_CLUSTER_END, fd);
+}
+
+int fat_write(off_t base, int fd)
+{
+ cluster_t c = 0;
+
+ if (base != le32_to_cpu(sb.fat_sector_start) * SECTOR_SIZE(sb))
+ exfat_bug("unexpected FAT location: %"PRIu64" (expected %u)",
+ base, le32_to_cpu(sb.fat_sector_start) * SECTOR_SIZE(sb));
+
+ if (!(c = fat_write_entry(c, 0xfffffff8, fd))) /* media type */
+ return errno;
+ if (!(c = fat_write_entry(c, 0xffffffff, fd))) /* some weird constant */
+ return errno;
+ if (!(c = fat_write_entries(c, cbm_size(), fd)))
+ return errno;
+ if (!(c = fat_write_entries(c, uct_size(), fd)))
+ return errno;
+ if (!(c = fat_write_entries(c, rootdir_size(), fd)))
+ return errno;
+
+ return 0;
+}
--- /dev/null
+/*
+ fat.h (09.11.10)
+ File Allocation Table creation code.
+
+ Copyright (C) 2009, 2010 Andrew Nayenko
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef MKFS_FAT_H_INCLUDED
+#define MKFS_FAT_H_INCLUDED
+
+off_t fat_alignment(void);
+off_t fat_size(void);
+int fat_write(off_t base, int fd);
+
+#endif /* ifndef MKFS_FAT_H_INCLUDED */
--- /dev/null
+/*
+ main.c (15.08.10)
+ Creates exFAT file system.
+
+ Copyright (C) 2010 Andrew Nayenko
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <sys/types.h>
+#include <sys/time.h>
+#include <unistd.h>
+#include <inttypes.h>
+#include <stdio.h>
+#include <string.h>
+#include <limits.h>
+#include <errno.h>
+#include <exfat.h>
+#include "vbr.h"
+#include "fat.h"
+#include "cbm.h"
+#include "uct.h"
+#include "rootdir.h"
+
+#define ROUND_UP(x, d) (DIV_ROUND_UP(x, d) * (d))
+
+struct exfat_super_block sb;
+struct exfat_entry_label label_entry = {EXFAT_ENTRY_LABEL ^ EXFAT_ENTRY_VALID};
+struct exfat_entry_bitmap bitmap_entry = {EXFAT_ENTRY_BITMAP};
+struct exfat_entry_upcase upcase_entry = {EXFAT_ENTRY_UPCASE};
+
+struct exfat_structure
+{
+ const char* name;
+ int order;
+ off_t (*get_alignment)(void);
+ off_t (*get_size)(void);
+ int (*write_data)(off_t, int);
+};
+
+static int init_sb(off_t volume_size, int sector_bits, int spc_bits,
+ uint32_t volume_serial, int first_sector)
+{
+ uint32_t clusters_max = (volume_size >> sector_bits >> spc_bits);
+ uint32_t fat_sectors = DIV_ROUND_UP(clusters_max * 4, 1 << sector_bits);
+ uint32_t allocated_clusters;
+
+ memset(&sb, 0, sizeof(struct exfat_super_block));
+ sb.jump[0] = 0xeb;
+ sb.jump[1] = 0x76;
+ sb.jump[2] = 0x90;
+ memcpy(sb.oem_name, "EXFAT ", sizeof(sb.oem_name));
+ sb.sector_start = cpu_to_le64(first_sector);
+ sb.sector_count = cpu_to_le64(volume_size >> sector_bits);
+ sb.fat_sector_start = cpu_to_le32(128); /* FIXME */
+ sb.fat_sector_count = cpu_to_le32(ROUND_UP(
+ le32_to_cpu(sb.fat_sector_start) + fat_sectors, 1 << spc_bits) -
+ le32_to_cpu(sb.fat_sector_start));
+ /* cluster_sector_start will be set later */
+ sb.cluster_count = cpu_to_le32(clusters_max -
+ ((le32_to_cpu(sb.fat_sector_start) +
+ le32_to_cpu(sb.fat_sector_count)) >> spc_bits));
+ /* rootdir_cluster will be set later */
+ sb.volume_serial = cpu_to_le32(volume_serial);
+ sb.version.major = 1;
+ sb.version.minor = 0;
+ sb.volume_state = cpu_to_le16(0);
+ sb.sector_bits = sector_bits;
+ sb.spc_bits = spc_bits;
+ sb.fat_count = 1;
+ sb.drive_no = 0x80;
+ sb.allocated_percent = 0;
+ sb.boot_signature = cpu_to_le16(0xaa55);
+
+ allocated_clusters =
+ DIV_ROUND_UP(cbm_size(), CLUSTER_SIZE(sb)) +
+ DIV_ROUND_UP(uct_size(), CLUSTER_SIZE(sb)) +
+ DIV_ROUND_UP(rootdir_size(), CLUSTER_SIZE(sb));
+ if (clusters_max < ((le32_to_cpu(sb.fat_sector_start) +
+ le32_to_cpu(sb.fat_sector_count)) >> spc_bits) +
+ allocated_clusters)
+ {
+ exfat_error("too small volume (%"PRIu64" bytes)", volume_size);
+ return 1;
+ }
+ exfat_print_info(&sb, le32_to_cpu(sb.cluster_count) -
+ allocated_clusters);
+ return 0;
+}
+
+static int erase_device(int fd)
+{
+ off_t erase_size;
+ off_t erase_sectors;
+ off_t i;
+ void* sector;
+
+ erase_size = ((uint64_t)
+ le32_to_cpu(sb.fat_sector_start) +
+ le32_to_cpu(sb.fat_sector_count)) * SECTOR_SIZE(sb);
+ erase_size = ROUND_UP(erase_size, cbm_alignment());
+ erase_size += cbm_size();
+ erase_size = ROUND_UP(erase_size, uct_alignment());
+ erase_size += uct_size();
+ erase_size = ROUND_UP(erase_size, rootdir_alignment());
+ erase_size += rootdir_size();
+
+ erase_sectors = erase_size / SECTOR_SIZE(sb);
+
+ if (lseek(fd, 0, SEEK_SET) == (off_t) -1)
+ {
+ exfat_error("seek failed");
+ return 1;
+ }
+
+ sector = malloc(SECTOR_SIZE(sb));
+ if (sector == NULL)
+ {
+ exfat_error("failed to allocate erase sector");
+ return 1;
+ }
+ memset(sector, 0, SECTOR_SIZE(sb));
+
+ for (i = 0; i < erase_sectors; i++)
+ {
+ if (write(fd, sector, SECTOR_SIZE(sb)) == -1)
+ {
+ free(sector);
+ exfat_error("failed to erase sector %"PRIu64, i);
+ return 1;
+ }
+ if (i * 100 / erase_sectors != (i + 1) * 100 / erase_sectors)
+ {
+ printf("\b\b\b%2"PRIu64"%%", (i + 1) * 100 / erase_sectors);
+ fflush(stdout);
+ }
+ }
+ free(sector);
+ return 0;
+}
+
+/*
+ * exFAT layout:
+ * - Volume Boot Record (VBR)
+ * - Main Boot Sector (MBR)
+ * - Main Extended Boot Sectors (MEBS)
+ * - OEM Parameters
+ * - Reserved sector
+ * - Checksum sector
+ * - Volume Boot Record copy
+ * - File Allocation Table (FAT)
+ * - Clusters heap
+ * - Clusters bitmap
+ * - Upper case table
+ * - Root directory
+ */
+#define FS_OBJECT(order, name) \
+ {#name, order, name##_alignment, name##_size, name##_write}
+static struct exfat_structure structures[] =
+{
+ FS_OBJECT(3, vbr),
+ FS_OBJECT(3, vbr),
+ FS_OBJECT(2, fat),
+ FS_OBJECT(1, cbm),
+ FS_OBJECT(1, uct),
+ FS_OBJECT(1, rootdir)
+};
+#undef FS_OBJECT
+
+static off_t write_structure(int fd, struct exfat_structure* structure,
+ off_t current)
+{
+ off_t alignment = structure->get_alignment();
+ off_t base = ROUND_UP(current, alignment);
+
+ if (lseek(fd, base, SEEK_SET) == (off_t) -1)
+ {
+ exfat_error("seek to %"PRIu64" failed", base);
+ return -1;
+ }
+ if (structure->order > 0)
+ {
+ int rc = structure->write_data(base, fd);
+ if (rc != 0)
+ {
+ exfat_error("%s creation failed: %s", structure->name,
+ strerror(rc));
+ return -1;
+ }
+ structure->order--;
+ }
+ return base + structure->get_size();
+}
+
+static int write_structures(int fd)
+{
+ off_t current;
+ size_t i;
+ int remainder;
+
+ do
+ {
+ current = 0;
+ remainder = 0;
+ for (i = 0; i < sizeof(structures) / sizeof(structures[0]); i++)
+ {
+ current = write_structure(fd, &structures[i], current);
+ if (current == (off_t) -1)
+ return 1;
+ remainder += structures[i].order;
+ }
+ }
+ while (remainder > 0);
+ return 0;
+}
+
+static int get_spc_bits(int user_defined, off_t volume_size)
+{
+ if (user_defined != -1)
+ return user_defined;
+
+ if (volume_size < 256ull * 1024 * 1024)
+ return 3; /* 4 KB */
+ else if (volume_size < 32ull * 1024 * 1024 * 1024)
+ return 6; /* 32 KB */
+ else
+ return 8; /* 128 KB */
+}
+
+static int set_volume_label(int fd, const char* volume_label)
+{
+ le16_t tmp[EXFAT_ENAME_MAX + 1];
+
+ if (volume_label == NULL)
+ return 0;
+
+ memset(tmp, 0, sizeof(tmp));
+ if (utf8_to_utf16(tmp, volume_label, EXFAT_ENAME_MAX,
+ strlen(volume_label)) != 0)
+ {
+ close(fd);
+ return 1;
+ }
+ memcpy(label_entry.name, tmp, EXFAT_ENAME_MAX * sizeof(le16_t));
+ label_entry.length = utf16_length(tmp);
+ label_entry.type |= EXFAT_ENTRY_VALID;
+ return 0;
+}
+
+static uint32_t get_volume_serial(uint32_t user_defined)
+{
+ struct timeval now;
+
+ if (user_defined != 0)
+ return user_defined;
+
+ if (gettimeofday(&now, NULL) != 0)
+ return 0;
+ return (now.tv_sec << 20) | now.tv_usec;
+}
+
+static int mkfs(const char* spec, int sector_bits, int spc_bits,
+ const char* volume_label, uint32_t volume_serial, int first_sector)
+{
+ int fd;
+ off_t volume_size;
+ char spec_abs[PATH_MAX];
+
+ if (realpath(spec, spec_abs) == NULL)
+ {
+ exfat_error("failed to get absolute path for `%s'", spec);
+ return 1;
+ }
+
+ fd = exfat_open(spec_abs, 0);
+ if (fd < 0)
+ return 1;
+
+ volume_size = lseek(fd, 0, SEEK_END);
+ if (volume_size == (off_t) -1)
+ {
+ close(fd);
+ exfat_error("seek failed");
+ return 1;
+ }
+ spc_bits = get_spc_bits(spc_bits, volume_size);
+
+ if (set_volume_label(fd, volume_label) != 0)
+ {
+ close(fd);
+ return 1;
+ }
+
+ volume_serial = get_volume_serial(volume_serial);
+ if (volume_serial == 0)
+ {
+ close(fd);
+ exfat_error("failed to get current time to form volume id");
+ return 1;
+ }
+
+ if (init_sb(volume_size, sector_bits, spc_bits, volume_serial,
+ first_sector) != 0)
+ {
+ close(fd);
+ return 1;
+ }
+
+ printf("Creating... %2u%%", 0);
+ fflush(stdout);
+ if (erase_device(fd) != 0)
+ {
+ close(fd);
+ return 1;
+ }
+ if (write_structures(fd) != 0)
+ {
+ close(fd);
+ return 1;
+ }
+ puts("\b\b\b\bdone.");
+
+ printf("Flushing... ");
+ fflush(stdout);
+ if (fsync(fd) < 0)
+ {
+ close(fd);
+ exfat_error("fsync failed for `%s'", spec_abs);
+ return 1;
+ }
+ puts("done.");
+ if (close(fd) < 0)
+ {
+ exfat_error("close failed for `%s'", spec_abs);
+ return 1;
+ }
+ printf("File system created successfully.\n");
+ return 0;
+}
+
+static int logarithm2(int n)
+{
+ int i;
+
+ for (i = 0; i < sizeof(int) * CHAR_BIT - 1; i++)
+ if ((1 << i) == n)
+ return i;
+ return -1;
+}
+
+static void usage(const char* prog)
+{
+ fprintf(stderr, "Usage: %s [-i volume-id] [-n label] "
+ "[-p partition-first-sector] "
+ "[-s sectors-per-cluster] [-v] <device>\n", prog);
+ exit(1);
+}
+
+int main(int argc, char* argv[])
+{
+ const char* spec = NULL;
+ char** pp;
+ int spc_bits = -1;
+ const char* volume_label = NULL;
+ uint32_t volume_serial = 0;
+ int first_sector = 0;
+
+ printf("mkexfatfs %u.%u.%u\n",
+ EXFAT_VERSION_MAJOR, EXFAT_VERSION_MINOR, EXFAT_VERSION_PATCH);
+
+ for (pp = argv + 1; *pp; pp++)
+ {
+ if (strcmp(*pp, "-s") == 0)
+ {
+ pp++;
+ if (*pp == NULL)
+ usage(argv[0]);
+ spc_bits = logarithm2(atoi(*pp));
+ if (spc_bits < 0)
+ {
+ exfat_error("invalid option value: `%s'", *pp);
+ return 1;
+ }
+ }
+ else if (strcmp(*pp, "-n") == 0)
+ {
+ pp++;
+ if (*pp == NULL)
+ usage(argv[0]);
+ volume_label = *pp;
+ /* TODO check length */
+ }
+ else if (strcmp(*pp, "-i") == 0)
+ {
+ pp++;
+ if (*pp == NULL)
+ usage(argv[0]);
+ volume_serial = strtol(*pp, NULL, 16);
+ }
+ else if (strcmp(*pp, "-p") == 0)
+ {
+ pp++;
+ if (*pp == NULL)
+ usage(argv[0]);
+ first_sector = atoi(*pp);
+ }
+ else if (strcmp(*pp, "-v") == 0)
+ {
+ puts("Copyright (C) 2010 Andrew Nayenko");
+ return 0;
+ }
+ else if (spec == NULL)
+ spec = *pp;
+ else
+ usage(argv[0]);
+ }
+ if (spec == NULL)
+ usage(argv[0]);
+
+ return mkfs(spec, 9, spc_bits, volume_label, volume_serial, first_sector);
+}
--- /dev/null
+/*
+ mkexfat.h (09.11.10)
+ Common declarations.
+
+ Copyright (C) 2009, 2010 Andrew Nayenko
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef MKFS_MKEXFAT_H_INCLUDED
+#define MKFS_MKEXFAT_H_INCLUDED
+
+#include <exfat.h>
+
+extern struct exfat_super_block sb;
+extern struct exfat_entry_label label_entry;
+extern struct exfat_entry_bitmap bitmap_entry;
+extern struct exfat_entry_upcase upcase_entry;
+
+#define OFFSET_TO_SECTOR(off) ((off) >> (sb).sector_bits)
+#define SECTOR_TO_CLUSTER(sector) \
+ ((((sector) - le32_to_cpu((sb).cluster_sector_start)) >> (sb).spc_bits) + \
+ EXFAT_FIRST_DATA_CLUSTER)
+#define OFFSET_TO_CLUSTER(off) SECTOR_TO_CLUSTER(OFFSET_TO_SECTOR(off))
+
+#endif /* ifndef MKFS_MKEXFAT_H_INCLUDED */
--- /dev/null
+.\" Copyright (C) 2011 Andrew Nayenko
+.\"
+.TH MKEXFATFS 8 "January 2011"
+.SH NAME
+.B mkexfatfs
+\- create an exFAT file system
+.SH SYNOPSIS
+.B mkexfatfs
+[
+.B \-i
+.I volume-id
+]
+[
+.B \-n
+.I volume-name
+]
+[
+.B \-p
+.I partition-first-sector
+]
+[
+.B \-s
+.I sectors-per-cluster
+]
+[
+.B \-v
+]
+.I device
+
+.SH DESCRIPTION
+.B mkexfatfs
+creates an exFAT file system on a block device.
+.I device
+is a special file corresponding to the device.
+
+.SH OPTIONS
+Command line options available:
+.TP
+.BI \-i " volume-id"
+A 32-bit hexadecimal number. By default a value based on current time is set.
+.TP
+.BI \-n " volume-name"
+Volume name (label), up to 15 characters. By default no label is set.
+.TP
+.BI \-p " partition-first-sector"
+First sector of the partition starting from the beginning of the whole disk.
+exFAT super block has a field for this value but in fact it's optional and
+does not affect anything. Default is 0.
+.TP
+.BI \-s " sectors-per-cluster"
+Number of physical sectors per cluster (cluster is an allocation unit in
+exFAT). Must be a power of 2, i.e. 1, 2, 4, 8, etc. Cluster size can not
+exceed 32 MB. Default cluster sizes are:
+4 KB if volume size is less than 256 MB,
+32 KB if volume size is from 256 MB to 32 GB,
+128 KB if volume size is 32 GB or larger.
+.TP
+.BI \-v
+Print version and copyright.
+
+.SH EXIT CODES
+Zero is returned on successful creation. Any other code means an error.
+
+.SH AUTHOR
+Andrew Nayenko
+
+.SH SEE ALSO
+.BR mkfs (8)
--- /dev/null
+/*
+ rootdir.c (09.11.10)
+ Root directory creation code.
+
+ Copyright (C) 2009, 2010 Andrew Nayenko
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <unistd.h>
+#include <errno.h>
+#include "mkexfat.h"
+
+off_t rootdir_alignment(void)
+{
+ return CLUSTER_SIZE(sb);
+}
+
+off_t rootdir_size(void)
+{
+ return CLUSTER_SIZE(sb);
+}
+
+int rootdir_write(off_t base, int fd)
+{
+ if (write(fd, &label_entry, sizeof(struct exfat_entry)) == -1)
+ return 1;
+ if (write(fd, &bitmap_entry, sizeof(struct exfat_entry)) == -1)
+ return 1;
+ if (write(fd, &upcase_entry, sizeof(struct exfat_entry)) == -1)
+ return 1;
+ /* No need to write EOD entry because the whole rootdir cluster was
+ erased by erase_device(). */
+ sb.rootdir_cluster = cpu_to_le32(OFFSET_TO_CLUSTER(base));
+ return 0;
+}
--- /dev/null
+/*
+ rootdir.h (09.11.10)
+ Root directory creation code.
+
+ Copyright (C) 2009, 2010 Andrew Nayenko
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef MKFS_ROOTDIR_H_INCLUDED
+#define MKFS_ROOTDIR_H_INCLUDED
+
+off_t rootdir_alignment(void);
+off_t rootdir_size(void);
+int rootdir_write(off_t base, int fd);
+
+#endif /* ifndef MKFS_ROOTDIR_H_INCLUDED */
--- /dev/null
+/*
+ uct.c (09.11.10)
+ Upper Case Table creation code.
+
+ Copyright (C) 2009, 2010 Andrew Nayenko
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <unistd.h>
+#include <errno.h>
+#include "mkexfat.h"
+#include "uctc.h"
+
+off_t uct_alignment(void)
+{
+ return CLUSTER_SIZE(sb);
+}
+
+off_t uct_size(void)
+{
+ return sizeof(upcase_table);
+}
+
+static le32_t uct_checksum(void)
+{
+ size_t i;
+ uint32_t sum = 0;
+
+ for (i = 0; i < sizeof(upcase_table); i++)
+ sum = ((sum << 31) | (sum >> 1)) + upcase_table[i];
+ return cpu_to_le32(sum);
+}
+
+int uct_write(off_t base, int fd)
+{
+ if (write(fd, upcase_table, sizeof(upcase_table)) == -1)
+ return errno;
+ upcase_entry.checksum = uct_checksum();
+ upcase_entry.start_cluster = cpu_to_le32(OFFSET_TO_CLUSTER(base));
+ upcase_entry.size = cpu_to_le64(sizeof(upcase_table));
+ return 0;
+}
--- /dev/null
+/*
+ uct.h (09.11.10)
+ Upper Case Table creation code.
+
+ Copyright (C) 2009, 2010 Andrew Nayenko
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef MKFS_UCT_H_INCLUDED
+#define MKFS_UCT_H_INCLUDED
+
+off_t uct_alignment(void);
+off_t uct_size(void);
+int uct_write(off_t base, int fd);
+
+#endif /* ifndef MKFS_UCT_H_INCLUDED */
--- /dev/null
+/*
+ uctc.h (30.10.10)
+ Upper Case Table contents.
+
+ Copyright (C) 2009, 2010 Andrew Nayenko
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef MKFS_UCTC_H_INCLUDED
+#define MKFS_UCTC_H_INCLUDED
+
+uint8_t upcase_table[] =
+{
+ 0x00, 0x00, 0x01, 0x00, 0x02, 0x00, 0x03, 0x00,
+ 0x04, 0x00, 0x05, 0x00, 0x06, 0x00, 0x07, 0x00,
+ 0x08, 0x00, 0x09, 0x00, 0x0a, 0x00, 0x0b, 0x00,
+ 0x0c, 0x00, 0x0d, 0x00, 0x0e, 0x00, 0x0f, 0x00,
+ 0x10, 0x00, 0x11, 0x00, 0x12, 0x00, 0x13, 0x00,
+ 0x14, 0x00, 0x15, 0x00, 0x16, 0x00, 0x17, 0x00,
+ 0x18, 0x00, 0x19, 0x00, 0x1a, 0x00, 0x1b, 0x00,
+ 0x1c, 0x00, 0x1d, 0x00, 0x1e, 0x00, 0x1f, 0x00,
+ 0x20, 0x00, 0x21, 0x00, 0x22, 0x00, 0x23, 0x00,
+ 0x24, 0x00, 0x25, 0x00, 0x26, 0x00, 0x27, 0x00,
+ 0x28, 0x00, 0x29, 0x00, 0x2a, 0x00, 0x2b, 0x00,
+ 0x2c, 0x00, 0x2d, 0x00, 0x2e, 0x00, 0x2f, 0x00,
+ 0x30, 0x00, 0x31, 0x00, 0x32, 0x00, 0x33, 0x00,
+ 0x34, 0x00, 0x35, 0x00, 0x36, 0x00, 0x37, 0x00,
+ 0x38, 0x00, 0x39, 0x00, 0x3a, 0x00, 0x3b, 0x00,
+ 0x3c, 0x00, 0x3d, 0x00, 0x3e, 0x00, 0x3f, 0x00,
+ 0x40, 0x00, 0x41, 0x00, 0x42, 0x00, 0x43, 0x00,
+ 0x44, 0x00, 0x45, 0x00, 0x46, 0x00, 0x47, 0x00,
+ 0x48, 0x00, 0x49, 0x00, 0x4a, 0x00, 0x4b, 0x00,
+ 0x4c, 0x00, 0x4d, 0x00, 0x4e, 0x00, 0x4f, 0x00,
+ 0x50, 0x00, 0x51, 0x00, 0x52, 0x00, 0x53, 0x00,
+ 0x54, 0x00, 0x55, 0x00, 0x56, 0x00, 0x57, 0x00,
+ 0x58, 0x00, 0x59, 0x00, 0x5a, 0x00, 0x5b, 0x00,
+ 0x5c, 0x00, 0x5d, 0x00, 0x5e, 0x00, 0x5f, 0x00,
+ 0x60, 0x00, 0x41, 0x00, 0x42, 0x00, 0x43, 0x00,
+ 0x44, 0x00, 0x45, 0x00, 0x46, 0x00, 0x47, 0x00,
+ 0x48, 0x00, 0x49, 0x00, 0x4a, 0x00, 0x4b, 0x00,
+ 0x4c, 0x00, 0x4d, 0x00, 0x4e, 0x00, 0x4f, 0x00,
+ 0x50, 0x00, 0x51, 0x00, 0x52, 0x00, 0x53, 0x00,
+ 0x54, 0x00, 0x55, 0x00, 0x56, 0x00, 0x57, 0x00,
+ 0x58, 0x00, 0x59, 0x00, 0x5a, 0x00, 0x7b, 0x00,
+ 0x7c, 0x00, 0x7d, 0x00, 0x7e, 0x00, 0x7f, 0x00,
+ 0x80, 0x00, 0x81, 0x00, 0x82, 0x00, 0x83, 0x00,
+ 0x84, 0x00, 0x85, 0x00, 0x86, 0x00, 0x87, 0x00,
+ 0x88, 0x00, 0x89, 0x00, 0x8a, 0x00, 0x8b, 0x00,
+ 0x8c, 0x00, 0x8d, 0x00, 0x8e, 0x00, 0x8f, 0x00,
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+ 0x83, 0x21, 0xff, 0xff, 0x4b, 0x03, 0xb6, 0x24,
+ 0xb7, 0x24, 0xb8, 0x24, 0xb9, 0x24, 0xba, 0x24,
+ 0xbb, 0x24, 0xbc, 0x24, 0xbd, 0x24, 0xbe, 0x24,
+ 0xbf, 0x24, 0xc0, 0x24, 0xc1, 0x24, 0xc2, 0x24,
+ 0xc3, 0x24, 0xc4, 0x24, 0xc5, 0x24, 0xc6, 0x24,
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+ 0xcb, 0x24, 0xcc, 0x24, 0xcd, 0x24, 0xce, 0x24,
+ 0xcf, 0x24, 0xff, 0xff, 0x46, 0x07, 0x00, 0x2c,
+ 0x01, 0x2c, 0x02, 0x2c, 0x03, 0x2c, 0x04, 0x2c,
+ 0x05, 0x2c, 0x06, 0x2c, 0x07, 0x2c, 0x08, 0x2c,
+ 0x09, 0x2c, 0x0a, 0x2c, 0x0b, 0x2c, 0x0c, 0x2c,
+ 0x0d, 0x2c, 0x0e, 0x2c, 0x0f, 0x2c, 0x10, 0x2c,
+ 0x11, 0x2c, 0x12, 0x2c, 0x13, 0x2c, 0x14, 0x2c,
+ 0x15, 0x2c, 0x16, 0x2c, 0x17, 0x2c, 0x18, 0x2c,
+ 0x19, 0x2c, 0x1a, 0x2c, 0x1b, 0x2c, 0x1c, 0x2c,
+ 0x1d, 0x2c, 0x1e, 0x2c, 0x1f, 0x2c, 0x20, 0x2c,
+ 0x21, 0x2c, 0x22, 0x2c, 0x23, 0x2c, 0x24, 0x2c,
+ 0x25, 0x2c, 0x26, 0x2c, 0x27, 0x2c, 0x28, 0x2c,
+ 0x29, 0x2c, 0x2a, 0x2c, 0x2b, 0x2c, 0x2c, 0x2c,
+ 0x2d, 0x2c, 0x2e, 0x2c, 0x5f, 0x2c, 0x60, 0x2c,
+ 0x60, 0x2c, 0x62, 0x2c, 0x63, 0x2c, 0x64, 0x2c,
+ 0x65, 0x2c, 0x66, 0x2c, 0x67, 0x2c, 0x67, 0x2c,
+ 0x69, 0x2c, 0x69, 0x2c, 0x6b, 0x2c, 0x6b, 0x2c,
+ 0x6d, 0x2c, 0x6e, 0x2c, 0x6f, 0x2c, 0x70, 0x2c,
+ 0x71, 0x2c, 0x72, 0x2c, 0x73, 0x2c, 0x74, 0x2c,
+ 0x75, 0x2c, 0x75, 0x2c, 0x77, 0x2c, 0x78, 0x2c,
+ 0x79, 0x2c, 0x7a, 0x2c, 0x7b, 0x2c, 0x7c, 0x2c,
+ 0x7d, 0x2c, 0x7e, 0x2c, 0x7f, 0x2c, 0x80, 0x2c,
+ 0x80, 0x2c, 0x82, 0x2c, 0x82, 0x2c, 0x84, 0x2c,
+ 0x84, 0x2c, 0x86, 0x2c, 0x86, 0x2c, 0x88, 0x2c,
+ 0x88, 0x2c, 0x8a, 0x2c, 0x8a, 0x2c, 0x8c, 0x2c,
+ 0x8c, 0x2c, 0x8e, 0x2c, 0x8e, 0x2c, 0x90, 0x2c,
+ 0x90, 0x2c, 0x92, 0x2c, 0x92, 0x2c, 0x94, 0x2c,
+ 0x94, 0x2c, 0x96, 0x2c, 0x96, 0x2c, 0x98, 0x2c,
+ 0x98, 0x2c, 0x9a, 0x2c, 0x9a, 0x2c, 0x9c, 0x2c,
+ 0x9c, 0x2c, 0x9e, 0x2c, 0x9e, 0x2c, 0xa0, 0x2c,
+ 0xa0, 0x2c, 0xa2, 0x2c, 0xa2, 0x2c, 0xa4, 0x2c,
+ 0xa4, 0x2c, 0xa6, 0x2c, 0xa6, 0x2c, 0xa8, 0x2c,
+ 0xa8, 0x2c, 0xaa, 0x2c, 0xaa, 0x2c, 0xac, 0x2c,
+ 0xac, 0x2c, 0xae, 0x2c, 0xae, 0x2c, 0xb0, 0x2c,
+ 0xb0, 0x2c, 0xb2, 0x2c, 0xb2, 0x2c, 0xb4, 0x2c,
+ 0xb4, 0x2c, 0xb6, 0x2c, 0xb6, 0x2c, 0xb8, 0x2c,
+ 0xb8, 0x2c, 0xba, 0x2c, 0xba, 0x2c, 0xbc, 0x2c,
+ 0xbc, 0x2c, 0xbe, 0x2c, 0xbe, 0x2c, 0xc0, 0x2c,
+ 0xc0, 0x2c, 0xc2, 0x2c, 0xc2, 0x2c, 0xc4, 0x2c,
+ 0xc4, 0x2c, 0xc6, 0x2c, 0xc6, 0x2c, 0xc8, 0x2c,
+ 0xc8, 0x2c, 0xca, 0x2c, 0xca, 0x2c, 0xcc, 0x2c,
+ 0xcc, 0x2c, 0xce, 0x2c, 0xce, 0x2c, 0xd0, 0x2c,
+ 0xd0, 0x2c, 0xd2, 0x2c, 0xd2, 0x2c, 0xd4, 0x2c,
+ 0xd4, 0x2c, 0xd6, 0x2c, 0xd6, 0x2c, 0xd8, 0x2c,
+ 0xd8, 0x2c, 0xda, 0x2c, 0xda, 0x2c, 0xdc, 0x2c,
+ 0xdc, 0x2c, 0xde, 0x2c, 0xde, 0x2c, 0xe0, 0x2c,
+ 0xe0, 0x2c, 0xe2, 0x2c, 0xe2, 0x2c, 0xe4, 0x2c,
+ 0xe5, 0x2c, 0xe6, 0x2c, 0xe7, 0x2c, 0xe8, 0x2c,
+ 0xe9, 0x2c, 0xea, 0x2c, 0xeb, 0x2c, 0xec, 0x2c,
+ 0xed, 0x2c, 0xee, 0x2c, 0xef, 0x2c, 0xf0, 0x2c,
+ 0xf1, 0x2c, 0xf2, 0x2c, 0xf3, 0x2c, 0xf4, 0x2c,
+ 0xf5, 0x2c, 0xf6, 0x2c, 0xf7, 0x2c, 0xf8, 0x2c,
+ 0xf9, 0x2c, 0xfa, 0x2c, 0xfb, 0x2c, 0xfc, 0x2c,
+ 0xfd, 0x2c, 0xfe, 0x2c, 0xff, 0x2c, 0xa0, 0x10,
+ 0xa1, 0x10, 0xa2, 0x10, 0xa3, 0x10, 0xa4, 0x10,
+ 0xa5, 0x10, 0xa6, 0x10, 0xa7, 0x10, 0xa8, 0x10,
+ 0xa9, 0x10, 0xaa, 0x10, 0xab, 0x10, 0xac, 0x10,
+ 0xad, 0x10, 0xae, 0x10, 0xaf, 0x10, 0xb0, 0x10,
+ 0xb1, 0x10, 0xb2, 0x10, 0xb3, 0x10, 0xb4, 0x10,
+ 0xb5, 0x10, 0xb6, 0x10, 0xb7, 0x10, 0xb8, 0x10,
+ 0xb9, 0x10, 0xba, 0x10, 0xbb, 0x10, 0xbc, 0x10,
+ 0xbd, 0x10, 0xbe, 0x10, 0xbf, 0x10, 0xc0, 0x10,
+ 0xc1, 0x10, 0xc2, 0x10, 0xc3, 0x10, 0xc4, 0x10,
+ 0xc5, 0x10, 0xff, 0xff, 0x1b, 0xd2, 0x21, 0xff,
+ 0x22, 0xff, 0x23, 0xff, 0x24, 0xff, 0x25, 0xff,
+ 0x26, 0xff, 0x27, 0xff, 0x28, 0xff, 0x29, 0xff,
+ 0x2a, 0xff, 0x2b, 0xff, 0x2c, 0xff, 0x2d, 0xff,
+ 0x2e, 0xff, 0x2f, 0xff, 0x30, 0xff, 0x31, 0xff,
+ 0x32, 0xff, 0x33, 0xff, 0x34, 0xff, 0x35, 0xff,
+ 0x36, 0xff, 0x37, 0xff, 0x38, 0xff, 0x39, 0xff,
+ 0x3a, 0xff, 0x5b, 0xff, 0x5c, 0xff, 0x5d, 0xff,
+ 0x5e, 0xff, 0x5f, 0xff, 0x60, 0xff, 0x61, 0xff,
+ 0x62, 0xff, 0x63, 0xff, 0x64, 0xff, 0x65, 0xff,
+ 0x66, 0xff, 0x67, 0xff, 0x68, 0xff, 0x69, 0xff,
+ 0x6a, 0xff, 0x6b, 0xff, 0x6c, 0xff, 0x6d, 0xff,
+ 0x6e, 0xff, 0x6f, 0xff, 0x70, 0xff, 0x71, 0xff,
+ 0x72, 0xff, 0x73, 0xff, 0x74, 0xff, 0x75, 0xff,
+ 0x76, 0xff, 0x77, 0xff, 0x78, 0xff, 0x79, 0xff,
+ 0x7a, 0xff, 0x7b, 0xff, 0x7c, 0xff, 0x7d, 0xff,
+ 0x7e, 0xff, 0x7f, 0xff, 0x80, 0xff, 0x81, 0xff,
+ 0x82, 0xff, 0x83, 0xff, 0x84, 0xff, 0x85, 0xff,
+ 0x86, 0xff, 0x87, 0xff, 0x88, 0xff, 0x89, 0xff,
+ 0x8a, 0xff, 0x8b, 0xff, 0x8c, 0xff, 0x8d, 0xff,
+ 0x8e, 0xff, 0x8f, 0xff, 0x90, 0xff, 0x91, 0xff,
+ 0x92, 0xff, 0x93, 0xff, 0x94, 0xff, 0x95, 0xff,
+ 0x96, 0xff, 0x97, 0xff, 0x98, 0xff, 0x99, 0xff,
+ 0x9a, 0xff, 0x9b, 0xff, 0x9c, 0xff, 0x9d, 0xff,
+ 0x9e, 0xff, 0x9f, 0xff, 0xa0, 0xff, 0xa1, 0xff,
+ 0xa2, 0xff, 0xa3, 0xff, 0xa4, 0xff, 0xa5, 0xff,
+ 0xa6, 0xff, 0xa7, 0xff, 0xa8, 0xff, 0xa9, 0xff,
+ 0xaa, 0xff, 0xab, 0xff, 0xac, 0xff, 0xad, 0xff,
+ 0xae, 0xff, 0xaf, 0xff, 0xb0, 0xff, 0xb1, 0xff,
+ 0xb2, 0xff, 0xb3, 0xff, 0xb4, 0xff, 0xb5, 0xff,
+ 0xb6, 0xff, 0xb7, 0xff, 0xb8, 0xff, 0xb9, 0xff,
+ 0xba, 0xff, 0xbb, 0xff, 0xbc, 0xff, 0xbd, 0xff,
+ 0xbe, 0xff, 0xbf, 0xff, 0xc0, 0xff, 0xc1, 0xff,
+ 0xc2, 0xff, 0xc3, 0xff, 0xc4, 0xff, 0xc5, 0xff,
+ 0xc6, 0xff, 0xc7, 0xff, 0xc8, 0xff, 0xc9, 0xff,
+ 0xca, 0xff, 0xcb, 0xff, 0xcc, 0xff, 0xcd, 0xff,
+ 0xce, 0xff, 0xcf, 0xff, 0xd0, 0xff, 0xd1, 0xff,
+ 0xd2, 0xff, 0xd3, 0xff, 0xd4, 0xff, 0xd5, 0xff,
+ 0xd6, 0xff, 0xd7, 0xff, 0xd8, 0xff, 0xd9, 0xff,
+ 0xda, 0xff, 0xdb, 0xff, 0xdc, 0xff, 0xdd, 0xff,
+ 0xde, 0xff, 0xdf, 0xff, 0xe0, 0xff, 0xe1, 0xff,
+ 0xe2, 0xff, 0xe3, 0xff, 0xe4, 0xff, 0xe5, 0xff,
+ 0xe6, 0xff, 0xe7, 0xff, 0xe8, 0xff, 0xe9, 0xff,
+ 0xea, 0xff, 0xeb, 0xff, 0xec, 0xff, 0xed, 0xff,
+ 0xee, 0xff, 0xef, 0xff, 0xf0, 0xff, 0xf1, 0xff,
+ 0xf2, 0xff, 0xf3, 0xff, 0xf4, 0xff, 0xf5, 0xff,
+ 0xf6, 0xff, 0xf7, 0xff, 0xf8, 0xff, 0xf9, 0xff,
+ 0xfa, 0xff, 0xfb, 0xff, 0xfc, 0xff, 0xfd, 0xff,
+ 0xfe, 0xff, 0xff, 0xff
+};
+
+#endif /* ifndef MKFS_UCTC_H_INCLUDED */
--- /dev/null
+/*
+ vbr.c (09.11.10)
+ Volume Boot Record creation code.
+
+ Copyright (C) 2009, 2010 Andrew Nayenko
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include "mkexfat.h"
+
+off_t vbr_alignment(void)
+{
+ return 1;
+}
+
+off_t vbr_size(void)
+{
+ return 12 * SECTOR_SIZE(sb);
+}
+
+int vbr_write(off_t base, int fd)
+{
+ uint32_t checksum;
+ le32_t* sector = malloc(SECTOR_SIZE(sb));
+ size_t i;
+
+ if (sector == NULL)
+ return errno;
+
+ if (write(fd, &sb, sizeof(struct exfat_super_block)) == -1)
+ {
+ free(sector);
+ return errno;
+ }
+ checksum = exfat_vbr_start_checksum(&sb, sizeof(struct exfat_super_block));
+
+ memset(sector, 0, SECTOR_SIZE(sb));
+ sector[SECTOR_SIZE(sb) / sizeof(sector[0]) - 1] = cpu_to_le32(0xaa550000);
+ for (i = 0; i < 8; i++)
+ {
+ if (write(fd, sector, SECTOR_SIZE(sb)) == -1)
+ {
+ free(sector);
+ return errno;
+ }
+ checksum = exfat_vbr_add_checksum(sector, SECTOR_SIZE(sb), checksum);
+ }
+
+ memset(sector, 0, SECTOR_SIZE(sb));
+ if (write(fd, sector, SECTOR_SIZE(sb)) == -1)
+ {
+ free(sector);
+ return errno;
+ }
+ checksum = exfat_vbr_add_checksum(sector, SECTOR_SIZE(sb), checksum);
+ if (write(fd, sector, SECTOR_SIZE(sb)) == -1)
+ {
+ free(sector);
+ return errno;
+ }
+ checksum = exfat_vbr_add_checksum(sector, SECTOR_SIZE(sb), checksum);
+
+ for (i = 0; i < SECTOR_SIZE(sb) / sizeof(sector[0]); i++)
+ sector[i] = cpu_to_le32(checksum);
+ if (write(fd, sector, SECTOR_SIZE(sb)) == -1)
+ {
+ free(sector);
+ return errno;
+ }
+
+ free(sector);
+ return 0;
+}
--- /dev/null
+/*
+ vbr.h (09.11.10)
+ Volume Boot Record creation code.
+
+ Copyright (C) 2009, 2010 Andrew Nayenko
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef MKFS_VBR_H_INCLUDED
+#define MKFS_VBR_H_INCLUDED
+
+off_t vbr_alignment(void);
+off_t vbr_size(void);
+int vbr_write(off_t base, int fd);
+
+#endif /* ifndef MKFS_VBR_H_INCLUDED */
projects / sven / exfat-utils.git / commitdiff