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Diffstat (limited to 'exfat')
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diff --git a/exfat/COPYING b/exfat/COPYING new file mode 100644 index 000000000..d159169d1 --- /dev/null +++ b/exfat/COPYING @@ -0,0 +1,339 @@ + GNU GENERAL PUBLIC LICENSE + Version 2, June 1991 + + Copyright (C) 1989, 1991 Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The licenses for most software are designed to take away your +freedom to share and change it. By contrast, the GNU General Public +License is intended to guarantee your freedom to share and change free +software--to make sure the software is free for all its users. This +General Public License applies to most of the Free Software +Foundation's software and to any other program whose authors commit to +using it. (Some other Free Software Foundation software is covered by +the GNU Lesser General Public License instead.) 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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, write to the Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + +Also add information on how to contact you by electronic and paper mail. + +If the program is interactive, make it output a short notice like this +when it starts in an interactive mode: + + Gnomovision version 69, Copyright (C) year name of author + Gnomovision 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, the commands you use may +be called something other than `show w' and `show c'; they could even be +mouse-clicks or menu items--whatever suits your program. + +You should also get your employer (if you work as a programmer) or your +school, if any, to sign a "copyright disclaimer" for the program, if +necessary. Here is a sample; alter the names: + + Yoyodyne, Inc., hereby disclaims all copyright interest in the program + `Gnomovision' (which makes passes at compilers) written by James Hacker. + + <signature of Ty Coon>, 1 April 1989 + Ty Coon, President of Vice + +This 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. diff --git a/exfat/ChangeLog b/exfat/ChangeLog new file mode 100644 index 000000000..d6f99d037 --- /dev/null +++ b/exfat/ChangeLog @@ -0,0 +1,146 @@ +1.2.2 (2015-11-09) + +* Improved reliability in case of a sudden unplug: FS will be in a clean state +after closing all files and performing sync(1). +* Fixed compilation on Debian GNU/kFreeBSD and GNU/Hurd platforms. +* Updated mount.exfat-fuse man page. + +1.2.1 (2015-09-24) + +* Fixed compatibility with Zalman VE-200: now newly created directories do not +have archive bit set. +* Fixed heap corruption: malformed FS can use invalid sector or cluster size. +* Fixed hang on mount: malformed FS can have cyclic references in the clusters +map. + +1.2.0 (2015-08-26) + +* Switched from SCons to autotools. +* Added musl libc support [Brendan Heading]. +* Worked around "FS is larger than device" error for memory cards formatted by +Panasonic Lumix cameras. +* Worked around "unknown entry type 0xe1" error for memory cards formatted by +Sony cameras. + +1.1.1 (2014-11-15) + +* Fixed mkfs crash on some sectors-per-cluster (-s option) values. + +1.1.0 (2014-07-08) + +* Relicensed the project from GPLv3+ to GPLv2+. +* OpenBSD support [Helg Bredow]. +* Improved I/O errors handling. +* Implemented fsync() and fsyncdir(). +* Fixed crash on Mac OS X 10.5 caused by non-standard use of realpath(). Also +fixed TrueCrypt disks unmounting. +* Avoid extra erase on writes to the end of a file. This should improve linear +write speed. +* Allow arbitrary changing of lower 9 bits of mode. Allow owner/group changing +to the same owner/group. This fixes rsync. +* Fixed buffers overflows when handling lengthy file names. +* Fixed "real size does not equal to size" error on volumes with pagefile.sys. +* Fixed negative IUsed in "df -i" output. + +1.0.1 (2013-02-02) + +* Fixed unexpected removal of a directory if it is moved into itself. +* Fixed "Operation not permitted" error on reading an empty file. + +1.0.0 (2013-01-19) + +* Fixed crash when renaming a file within a single directory and a new name +differs only in case. +* Fixed clusters allocation: a cluster beyond valid clusters range could be +allocated. +* Fixed crash when a volume is unmounted while some files are open. +* SConscript now respects AR and RANLIB environment variables. +* Improved error handling. + +Linux: + +* Enabled big_writes. This improves write speed (larger block size means less +switches between kernel- and user-space). +* Do BLKROGET ioctl to make sure the device is not read-only: after +"blockdev --setro" kernel still allows to open the device in read-write mode +but fails writes. + +OS X: + +* Fixed OS X 10.8 support. +* Switched to 64-bit inode numbers (now Mac OS X 10.5 or later is required). +* Switched from unmaintained MacFUSE to OSXFUSE (http://osxfuse.github.com). +* Fixed device size detection. Now mkfs works. +* Workarounded some utilities failures due to missing chmod() support. +* Disabled (senseless) permission checks made by FUSE. + +0.9.8 (2012-08-09) + +* The mkfs utility can now create huge file systems (up to several exabytes). +* Fixed handling of characters beyond Basic Multilingual Plane. +* Echo messages to syslog only if stderr is not connected to a terminal. + +0.9.7 (2012-03-08) + +* Out-of-the-box FreeBSD support (via ublio library). +* Fixed "missing EOD entry" error (could happen while reading directory that +consists of several clusters). +* Fixed interpretation of minutes field in files timestamps (minutes could be +displayed incorrectly). +* Fixed mtime seconds field initialization for newly created file (mtime could +be 1 sec less than creation time). +* SConscript now respects CC, CCFLAGS and LDFLAGS environment variables. + +0.9.6 (2012-01-14) + +* Fixed write performance regression introduced in 0.9.4. +* Mount in read-only mode if the device is write-protected. +* Set ctime to mtime to ensure we don't break programs that rely on ctime +(e.g. rsync considered that all files are outdated) [Eldad Zack]. +* Indicate that FS in not clean when it was not cleanly unmounted. +* Utilities are now compatible with GNU/Hurd. +* Fixed several memory leaks that could occur on error handling paths. +* Improved handling of corrupted file systems. + +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. diff --git a/exfat/README.md b/exfat/README.md new file mode 100644 index 000000000..3cf58b7e2 --- /dev/null +++ b/exfat/README.md @@ -0,0 +1,60 @@ +About +----- + +This project aims to provide a full-featured [exFAT][1] file system implementation for Unix-like systems. It consists of a [FUSE][2] module (fuse-exfat) and a set of utilities (exfat-utils). + +Supported operating systems: + +* GNU/Linux +* Mac OS X 10.5 or later +* FreeBSD +* OpenBSD + +Most GNU/Linux distributions already have fuse-exfat and exfat-utils in their repositories, so you can just install and use them. The next chapter describes how to compile them from source. + +Compiling +--------- + +To build this project under GNU/Linux you need to install the following packages: + +* git +* autoconf +* automake +* pkg-config +* fuse-devel (or libfuse-dev) +* gcc +* make + +Get the source code, change directory and compile: + + git clone https://github.com/relan/exfat.git + cd exfat + autoreconf --install + ./configure --prefix=/usr + make + +Then install driver and utilities: + + sudo make install + +You can remove them using this command: + + sudo make uninstall + +Mounting +-------- + +Modern GNU/Linux distributions will mount exFAT volumes automatically—util-linux-ng 2.18 (was renamed to util-linux in 2.19) is required for this. Anyway, you can mount manually (you will need root privileges): + + sudo mount.exfat-fuse /dev/sdXn /mnt/exfat + +where /dev/sdXn is the partition special file, /mnt/exfat is a mountpoint. + +Feedback +-------- + +If you have any questions, issues, suggestions, bug reports, etc. please create an [issue][3]. Pull requests are also welcome! + +[1]: http://en.wikipedia.org/wiki/ExFAT +[2]: http://en.wikipedia.org/wiki/Filesystem_in_Userspace +[3]: https://github.com/relan/exfat/issues diff --git a/exfat/dump/dumpexfat.8 b/exfat/dump/dumpexfat.8 new file mode 100644 index 000000000..5cf3995ed --- /dev/null +++ b/exfat/dump/dumpexfat.8 @@ -0,0 +1,46 @@ +.\" Copyright (C) 2011-2015 Andrew Nayenko +.\" +.TH DUMPEXFAT 8 "February 2011" +.SH NAME +.B dumpexfat +\- dump exFAT file system +.SH SYNOPSIS +.B dumpexfat +[ +.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) diff --git a/exfat/dump/main.c b/exfat/dump/main.c new file mode 100644 index 000000000..3ed3d8fea --- /dev/null +++ b/exfat/dump/main.c @@ -0,0 +1,183 @@ +/* + main.c (08.11.10) + Prints detailed information about exFAT volume. + + Free exFAT implementation. + Copyright (C) 2011-2015 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 2 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, write to the Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. +*/ + +#include <exfat.h> +#include <fcntl.h> +#include <unistd.h> +#include <inttypes.h> +#include <stdio.h> +#include <string.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) +{ + struct exfat_dev* dev; + struct exfat_super_block sb; + + dev = exfat_open(spec, EXFAT_MODE_RO); + if (dev == NULL) + return 1; + + if (exfat_read(dev, &sb, sizeof(struct exfat_super_block)) < 0) + { + exfat_close(dev); + exfat_error("failed to read from '%s'", spec); + return 1; + } + if (memcmp(sb.oem_name, "EXFAT ", sizeof(sb.oem_name)) != 0) + { + exfat_close(dev); + 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); + + exfat_close(dev); + return 0; +} + +static void dump_sectors(struct exfat* ef) +{ + loff_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, bool 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[]) +{ + int opt; + const char* spec = NULL; + bool sb_only = false; + bool used_sectors = false; + + printf("dumpexfat %s\n", VERSION); + + while ((opt = getopt(argc, argv, "suV")) != -1) + { + switch (opt) + { + case 's': + sb_only = true; + break; + case 'u': + used_sectors = true; + break; + case 'V': + puts("Copyright (C) 2011-2015 Andrew Nayenko"); + return 0; + default: + usage(argv[0]); + } + } + if (argc - optind != 1) + usage(argv[0]); + spec = argv[optind]; + + if (sb_only) + return dump_sb(spec); + + return dump_full(spec, used_sectors); +} diff --git a/exfat/fsck/Android.mk b/exfat/fsck/Android.mk new file mode 100644 index 000000000..64ebc0fa2 --- /dev/null +++ b/exfat/fsck/Android.mk @@ -0,0 +1,16 @@ +LOCAL_PATH := $(call my-dir) +include $(CLEAR_VARS) + +LOCAL_MODULE := fsckexfat +LOCAL_MODULE_STEM := fsck.exfat +LOCAL_MODULE_CLASS := RECOVERY_EXECUTABLES +LOCAL_MODULE_TAGS := optional +LOCAL_MODULE_PATH := $(TARGET_RECOVERY_ROOT_OUT)/sbin +LOCAL_CFLAGS = -D_FILE_OFFSET_BITS=64 -Wno-sign-compare +LOCAL_SRC_FILES = main.c +LOCAL_C_INCLUDES += $(LOCAL_PATH) \ + $(commands_recovery_local_path)/exfat/libexfat \ + $(commands_recovery_local_path)/fuse/include +LOCAL_SHARED_LIBRARIES := libexfat_twrp + +include $(BUILD_EXECUTABLE) diff --git a/exfat/fsck/exfatfsck.8 b/exfat/fsck/exfatfsck.8 new file mode 100644 index 000000000..e95048845 --- /dev/null +++ b/exfat/fsck/exfatfsck.8 @@ -0,0 +1,32 @@ +.\" Copyright (C) 2011-2015 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) diff --git a/exfat/fsck/main.c b/exfat/fsck/main.c new file mode 100644 index 000000000..ded76b20c --- /dev/null +++ b/exfat/fsck/main.c @@ -0,0 +1,178 @@ +/* + main.c (02.09.09) + exFAT file system checker. + + Free exFAT implementation. + Copyright (C) 2011-2015 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 2 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, write to the Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. +*/ + +#include <exfat.h> +#include <stdio.h> +#include <string.h> +#include <inttypes.h> +#include <unistd.h> + +#define exfat_debug(format, ...) + +uint64_t files_count, directories_count; + +static int 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; + int rc = 0; + + while (clusters--) + { + if (CLUSTER_INVALID(c)) + { + char name[UTF8_BYTES(EXFAT_NAME_MAX) + 1]; + + exfat_get_name(node, name, sizeof(name) - 1); + exfat_error("file '%s' has invalid cluster 0x%x", name, c); + rc = 1; + break; + } + if (BMAP_GET(ef->cmap.chunk, c - EXFAT_FIRST_DATA_CLUSTER) == 0) + { + char name[UTF8_BYTES(EXFAT_NAME_MAX) + 1]; + + exfat_get_name(node, name, sizeof(name) - 1); + exfat_error("cluster 0x%x of file '%s' is not allocated", c, name); + rc = 1; + } + c = exfat_next_cluster(ef, node, c); + } + return rc; +} + +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); + if (nodeck(ef, parent) != 0) + { + exfat_put_node(ef, parent); + return; + } + + path_length = strlen(path); + entry_path = malloc(path_length + 1 + UTF8_BYTES(EXFAT_NAME_MAX) + 1); + if (entry_path == NULL) + { + exfat_put_node(ef, parent); + 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); + return; + } + while ((node = exfat_readdir(ef, &it))) + { + exfat_get_name(node, entry_path + path_length + 1, + UTF8_BYTES(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[]) +{ + int opt; + const char* spec = NULL; + struct exfat ef; + + printf("exfatfsck %s\n", VERSION); + + while ((opt = getopt(argc, argv, "V")) != -1) + { + switch (opt) + { + case 'V': + puts("Copyright (C) 2011-2015 Andrew Nayenko"); + return 0; + default: + usage(argv[0]); + break; + } + } + if (argc - optind != 1) + usage(argv[0]); + spec = argv[optind]; + + 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; +} diff --git a/exfat/fuse/Android.mk b/exfat/fuse/Android.mk new file mode 100644 index 000000000..57f35be5d --- /dev/null +++ b/exfat/fuse/Android.mk @@ -0,0 +1,17 @@ +LOCAL_PATH := $(call my-dir) +include $(CLEAR_VARS) + +LOCAL_MODULE := exfat-fuse +LOCAL_MODULE_CLASS := RECOVERY_EXECUTABLES +LOCAL_MODULE_TAGS := optional +LOCAL_MODULE_PATH := $(TARGET_RECOVERY_ROOT_OUT)/sbin +LOCAL_CFLAGS = -D_FILE_OFFSET_BITS=64 -Wno-sign-compare -Wno-unused-parameter +LOCAL_SRC_FILES = main.c +LOCAL_C_INCLUDES += $(LOCAL_PATH) \ + $(commands_recovery_local_path)/exfat/libexfat \ + $(commands_recovery_local_path)/fuse/include \ + $(commands_recovery_local_path)/fuse/android +LOCAL_SHARED_LIBRARIES := libexfat_twrp +LOCAL_STATIC_LIBRARIES := libfusetwrp + +include $(BUILD_EXECUTABLE) diff --git a/exfat/fuse/main.c b/exfat/fuse/main.c new file mode 100644 index 000000000..30958f69f --- /dev/null +++ b/exfat/fuse/main.c @@ -0,0 +1,618 @@ +/* + main.c (01.09.09) + FUSE-based exFAT implementation. Requires FUSE 2.6 or later. + + Free exFAT implementation. + Copyright (C) 2010-2015 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 2 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, write to the Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. +*/ + +#include <exfat.h> +#define FUSE_USE_VERSION 26 +#include <fuse.h> +#include <errno.h> +#include <fcntl.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <inttypes.h> +#include <limits.h> +#include <sys/types.h> +#include <pwd.h> +#include <unistd.h> + +#ifndef DEBUG + #define exfat_debug(format, ...) +#endif + +#if !defined(FUSE_VERSION) || (FUSE_VERSION < 26) + #error FUSE 2.6 or later is required +#endif + +const char* default_options = "ro_fallback,allow_other,blkdev,big_writes," + "default_permissions"; + +struct exfat ef; + +static struct exfat_node* get_node(const struct fuse_file_info* fi) +{ + return (struct exfat_node*) (size_t) fi->fh; +} + +static void set_node(struct fuse_file_info* fi, struct exfat_node* node) +{ + fi->fh = (uint64_t) (size_t) node; + fi->keep_cache = 1; +} + +static int fuse_exfat_getattr(const char* path, struct stat* stbuf) +{ + struct exfat_node* node; + int rc; + + exfat_debug("[%s] %s", __func__, path); + + rc = exfat_lookup(&ef, &node, path); + if (rc != 0) + return rc; + + exfat_stat(&ef, node, stbuf); + exfat_put_node(&ef, node); + return 0; +} + +static int fuse_exfat_truncate(const char* path, loff_t size) +{ + struct exfat_node* node; + int rc; + + exfat_debug("[%s] %s, %"PRId64, __func__, path, size); + + rc = exfat_lookup(&ef, &node, path); + if (rc != 0) + return rc; + + rc = exfat_truncate(&ef, node, size, true); + if (rc != 0) + { + exfat_flush_node(&ef, node); /* ignore return code */ + exfat_put_node(&ef, node); + return rc; + } + rc = exfat_flush_node(&ef, node); + exfat_put_node(&ef, node); + return rc; +} + +static int fuse_exfat_readdir(const char* path, void* buffer, + fuse_fill_dir_t filler, loff_t offset, struct fuse_file_info* fi) +{ + struct exfat_node* parent; + struct exfat_node* node; + struct exfat_iterator it; + int rc; + char name[UTF8_BYTES(EXFAT_NAME_MAX) + 1]; + + exfat_debug("[%s] %s", __func__, path); + + rc = exfat_lookup(&ef, &parent, path); + if (rc != 0) + return rc; + if (!(parent->flags & EXFAT_ATTRIB_DIR)) + { + exfat_put_node(&ef, parent); + exfat_error("'%s' is not a directory (0x%x)", path, parent->flags); + return -ENOTDIR; + } + + filler(buffer, ".", NULL, 0); + filler(buffer, "..", NULL, 0); + + rc = exfat_opendir(&ef, parent, &it); + if (rc != 0) + { + exfat_put_node(&ef, parent); + exfat_error("failed to open directory '%s'", path); + return rc; + } + while ((node = exfat_readdir(&ef, &it))) + { + exfat_get_name(node, name, sizeof(name) - 1); + exfat_debug("[%s] %s: %s, %"PRId64" bytes, cluster 0x%x", __func__, + name, IS_CONTIGUOUS(*node) ? "contiguous" : "fragmented", + node->size, node->start_cluster); + filler(buffer, name, NULL, 0); + exfat_put_node(&ef, node); + } + exfat_closedir(&ef, &it); + exfat_put_node(&ef, parent); + return 0; +} + +static int fuse_exfat_open(const char* path, struct fuse_file_info* fi) +{ + struct exfat_node* node; + int rc; + + exfat_debug("[%s] %s", __func__, path); + + rc = exfat_lookup(&ef, &node, path); + if (rc != 0) + return rc; + set_node(fi, node); + return 0; +} + +static int fuse_exfat_create(const char* path, mode_t mode, + struct fuse_file_info* fi) +{ + struct exfat_node* node; + int rc; + + exfat_debug("[%s] %s 0%ho", __func__, path, mode); + + rc = exfat_mknod(&ef, path); + if (rc != 0) + return rc; + rc = exfat_lookup(&ef, &node, path); + if (rc != 0) + return rc; + set_node(fi, node); + return 0; +} + +static int fuse_exfat_release(const char* path, struct fuse_file_info* fi) +{ + /* + This handler is called by FUSE on close() syscall. If the FUSE + implementation does not call flush handler, we will flush node here. + But in this case we will not be able to return an error to the caller. + See fuse_exfat_flush() below. + */ + exfat_debug("[%s] %s", __func__, path); + exfat_flush_node(&ef, get_node(fi)); + exfat_put_node(&ef, get_node(fi)); + return 0; /* FUSE ignores this return value */ +} + +static int fuse_exfat_flush(const char* path, struct fuse_file_info* fi) +{ + /* + This handler may be called by FUSE on close() syscall. FUSE also deals + with removals of open files, so we don't free clusters on close but + only on rmdir and unlink. If the FUSE implementation does not call this + handler we will flush node on release. See fuse_exfat_relase() above. + */ + exfat_debug("[%s] %s", __func__, path); + return exfat_flush_node(&ef, get_node(fi)); +} + +static int fuse_exfat_fsync(const char* path, int datasync, + struct fuse_file_info *fi) +{ + int rc; + + exfat_debug("[%s] %s", __func__, path); + rc = exfat_flush_nodes(&ef); + if (rc != 0) + return rc; + rc = exfat_flush(&ef); + if (rc != 0) + return rc; + return exfat_fsync(ef.dev); +} + +static int fuse_exfat_read(const char* path, char* buffer, size_t size, + loff_t offset, struct fuse_file_info* fi) +{ + ssize_t ret; + + exfat_debug("[%s] %s (%zu bytes)", __func__, path, size); + ret = exfat_generic_pread(&ef, get_node(fi), buffer, size, offset); + if (ret < 0) + return -EIO; + return ret; +} + +static int fuse_exfat_write(const char* path, const char* buffer, size_t size, + loff_t offset, struct fuse_file_info* fi) +{ + ssize_t ret; + + exfat_debug("[%s] %s (%zu bytes)", __func__, path, size); + ret = exfat_generic_pwrite(&ef, get_node(fi), buffer, size, offset); + if (ret < 0) + return -EIO; + return ret; +} + +static int fuse_exfat_unlink(const char* path) +{ + struct exfat_node* node; + int rc; + + exfat_debug("[%s] %s", __func__, path); + + rc = exfat_lookup(&ef, &node, path); + if (rc != 0) + return rc; + + rc = exfat_unlink(&ef, node); + exfat_put_node(&ef, node); + if (rc != 0) + return rc; + return exfat_cleanup_node(&ef, node); +} + +static int fuse_exfat_rmdir(const char* path) +{ + struct exfat_node* node; + int rc; + + exfat_debug("[%s] %s", __func__, path); + + rc = exfat_lookup(&ef, &node, path); + if (rc != 0) + return rc; + + rc = exfat_rmdir(&ef, node); + exfat_put_node(&ef, node); + if (rc != 0) + return rc; + return exfat_cleanup_node(&ef, node); +} + +static int fuse_exfat_mknod(const char* path, mode_t mode, dev_t dev) +{ + exfat_debug("[%s] %s 0%ho", __func__, path, mode); + return exfat_mknod(&ef, path); +} + +static int fuse_exfat_mkdir(const char* path, mode_t mode) +{ + exfat_debug("[%s] %s 0%ho", __func__, path, mode); + return exfat_mkdir(&ef, path); +} + +static int fuse_exfat_rename(const char* old_path, const char* new_path) +{ + exfat_debug("[%s] %s => %s", __func__, old_path, new_path); + return exfat_rename(&ef, old_path, new_path); +} + +static int fuse_exfat_utimens(const char* path, const struct timespec tv[2]) +{ + struct exfat_node* node; + int rc; + + exfat_debug("[%s] %s", __func__, path); + + rc = exfat_lookup(&ef, &node, path); + if (rc != 0) + return rc; + + exfat_utimes(node, tv); + rc = exfat_flush_node(&ef, node); + exfat_put_node(&ef, node); + return rc; +} + +static int fuse_exfat_chmod(const char* path, mode_t mode) +{ + const mode_t VALID_MODE_MASK = S_IFREG | S_IFDIR | + S_IRWXU | S_IRWXG | S_IRWXO; + + exfat_debug("[%s] %s 0%ho", __func__, path, mode); + if (mode & ~VALID_MODE_MASK) + return -EPERM; + return 0; +} + +static int fuse_exfat_chown(const char* path, uid_t uid, gid_t gid) +{ + exfat_debug("[%s] %s %u:%u", __func__, path, uid, gid); + if (uid != ef.uid || gid != ef.gid) + return -EPERM; + return 0; +} + +static int fuse_exfat_statfs(const char* path, struct statvfs* sfs) +{ + exfat_debug("[%s]", __func__); + + sfs->f_bsize = CLUSTER_SIZE(*ef.sb); + sfs->f_frsize = CLUSTER_SIZE(*ef.sb); + sfs->f_blocks = le64_to_cpu(ef.sb->sector_count) >> ef.sb->spc_bits; + sfs->f_bavail = exfat_count_free_clusters(&ef); + sfs->f_bfree = sfs->f_bavail; + sfs->f_namemax = EXFAT_NAME_MAX; + + /* + Below are fake values because in exFAT there is + a) no simple way to count files; + b) no such thing as inode; + So here we assume that inode = cluster. + */ + sfs->f_files = le32_to_cpu(ef.sb->cluster_count); + sfs->f_favail = sfs->f_bfree >> ef.sb->spc_bits; + sfs->f_ffree = sfs->f_bavail; + + return 0; +} + +static void* fuse_exfat_init(struct fuse_conn_info* fci) +{ + exfat_debug("[%s]", __func__); +#ifdef FUSE_CAP_BIG_WRITES + fci->want |= FUSE_CAP_BIG_WRITES; +#endif + return NULL; +} + +static void fuse_exfat_destroy(void* unused) +{ + exfat_debug("[%s]", __func__); + exfat_unmount(&ef); +} + +static void usage(const char* prog) +{ + fprintf(stderr, "Usage: %s [-d] [-o options] [-V] <device> <dir>\n", prog); + exit(1); +} + +static struct fuse_operations fuse_exfat_ops = +{ + .getattr = fuse_exfat_getattr, + .truncate = fuse_exfat_truncate, + .readdir = fuse_exfat_readdir, + .open = fuse_exfat_open, + .create = fuse_exfat_create, + .release = fuse_exfat_release, + .flush = fuse_exfat_flush, + .fsync = fuse_exfat_fsync, + .fsyncdir = fuse_exfat_fsync, + .read = fuse_exfat_read, + .write = fuse_exfat_write, + .unlink = fuse_exfat_unlink, + .rmdir = fuse_exfat_rmdir, + .mknod = fuse_exfat_mknod, + .mkdir = fuse_exfat_mkdir, + .rename = fuse_exfat_rename, + .utimens = fuse_exfat_utimens, + .chmod = fuse_exfat_chmod, + .chown = fuse_exfat_chown, + .statfs = fuse_exfat_statfs, + .init = fuse_exfat_init, + .destroy = fuse_exfat_destroy, +}; + +static char* add_option(char* options, const char* name, const char* value) +{ + size_t size; + char* optionsf = options; + + if (value) + size = strlen(options) + strlen(name) + strlen(value) + 3; + else + size = strlen(options) + strlen(name) + 2; + + options = realloc(options, size); + if (options == NULL) + { + free(optionsf); + exfat_error("failed to reallocate options string"); + return NULL; + } + strcat(options, ","); + strcat(options, name); + if (value) + { + strcat(options, "="); + strcat(options, value); + } + return options; +} + +static char* add_user_option(char* options) +{ + struct passwd* pw; + + if (getuid() == 0) + return options; + + pw = getpwuid(getuid()); + if (pw == NULL || pw->pw_name == NULL) + { + free(options); + exfat_error("failed to determine username"); + return NULL; + } + return add_option(options, "user", pw->pw_name); +} + +static char* add_blksize_option(char* options, long cluster_size) +{ + long page_size = sysconf(_SC_PAGESIZE); + char blksize[20]; + + if (page_size < 1) + page_size = 0x1000; + + snprintf(blksize, sizeof(blksize), "%ld", MIN(page_size, cluster_size)); + return add_option(options, "blksize", blksize); +} + +static char* add_fuse_options(char* options, const char* spec) +{ + options = add_option(options, "fsname", spec); + if (options == NULL) + return NULL; + options = add_user_option(options); + if (options == NULL) + return NULL; + options = add_blksize_option(options, CLUSTER_SIZE(*ef.sb)); + if (options == NULL) + return NULL; + + return options; +} + +int main(int argc, char* argv[]) +{ + struct fuse_args mount_args = FUSE_ARGS_INIT(0, NULL); + struct fuse_args newfs_args = FUSE_ARGS_INIT(0, NULL); + const char* spec = NULL; + const char* mount_point = NULL; + char* mount_options; + int debug = 0; + struct fuse_chan* fc = NULL; + struct fuse* fh = NULL; + int opt; + + printf("FUSE exfat %s\n", VERSION); + + mount_options = strdup(default_options); + if (mount_options == NULL) + { + exfat_error("failed to allocate options string"); + return 1; + } + + while ((opt = getopt(argc, argv, "dno:Vv")) != -1) + { + switch (opt) + { + case 'd': + debug = 1; + break; + case 'n': + break; + case 'o': + mount_options = add_option(mount_options, optarg, NULL); + if (mount_options == NULL) + return 1; + break; + case 'V': + free(mount_options); + puts("Copyright (C) 2010-2015 Andrew Nayenko"); + return 0; + case 'v': + break; + default: + free(mount_options); + usage(argv[0]); + break; + } + } + if (argc - optind != 2) + { + free(mount_options); + usage(argv[0]); + } + spec = argv[optind]; + mount_point = argv[optind + 1]; + + if (exfat_mount(&ef, spec, mount_options) != 0) + { + free(mount_options); + return 1; + } + + if (ef.ro == -1) /* read-only fallback was used */ + { + mount_options = add_option(mount_options, "ro", NULL); + if (mount_options == NULL) + { + exfat_unmount(&ef); + return 1; + } + } + + mount_options = add_fuse_options(mount_options, spec); + if (mount_options == NULL) + { + exfat_unmount(&ef); + return 1; + } + + /* create arguments for fuse_mount() */ + if (fuse_opt_add_arg(&mount_args, "exfat") != 0 || + fuse_opt_add_arg(&mount_args, "-o") != 0 || + fuse_opt_add_arg(&mount_args, mount_options) != 0) + { + exfat_unmount(&ef); + free(mount_options); + return 1; + } + + free(mount_options); + + /* create FUSE mount point */ + fc = fuse_mount(mount_point, &mount_args); + fuse_opt_free_args(&mount_args); + if (fc == NULL) + { + exfat_unmount(&ef); + return 1; + } + + /* create arguments for fuse_new() */ + if (fuse_opt_add_arg(&newfs_args, "") != 0 || + (debug && fuse_opt_add_arg(&newfs_args, "-d") != 0)) + { + fuse_unmount(mount_point, fc); + exfat_unmount(&ef); + return 1; + } + + /* create new FUSE file system */ + fh = fuse_new(fc, &newfs_args, &fuse_exfat_ops, + sizeof(struct fuse_operations), NULL); + fuse_opt_free_args(&newfs_args); + if (fh == NULL) + { + fuse_unmount(mount_point, fc); + exfat_unmount(&ef); + return 1; + } + + /* exit session on HUP, TERM and INT signals and ignore PIPE signal */ + if (fuse_set_signal_handlers(fuse_get_session(fh)) != 0) + { + fuse_unmount(mount_point, fc); + fuse_destroy(fh); + exfat_unmount(&ef); + exfat_error("failed to set signal handlers"); + return 1; + } + + /* go to background (unless "-d" option is passed) and run FUSE + main loop */ + if (fuse_daemonize(debug) == 0) + { + if (fuse_loop(fh) != 0) + exfat_error("FUSE loop failure"); + } + else + exfat_error("failed to daemonize"); + + fuse_remove_signal_handlers(fuse_get_session(fh)); + /* note that fuse_unmount() must be called BEFORE fuse_destroy() */ + fuse_unmount(mount_point, fc); + fuse_destroy(fh); + return 0; +} diff --git a/exfat/fuse/mount.exfat-fuse.8 b/exfat/fuse/mount.exfat-fuse.8 new file mode 100644 index 000000000..38586ca45 --- /dev/null +++ b/exfat/fuse/mount.exfat-fuse.8 @@ -0,0 +1,108 @@ +.\" Copyright (C) 2010-2015 Andrew Nayenko +.\" +.TH EXFAT-FUSE 8 "July 2010" +.SH NAME +mount.exfat-fuse \- mount an exFAT file system +.SH SYNOPSIS +.B mount.exfat-fuse +[ +.B \-d +] +[ +.B \-n +] +[ +.B \-o +.I options +] +[ +.B \-V +] +[ +.B \-v +] +.I device dir + +.SH DESCRIPTION +.B mount.exfat-fuse +is a free exFAT file system implementation with write support. exFAT is a +simple file system created by Microsoft. It is intended to replace FAT32 +removing some of its limitations. exFAT is a standard FS for SDXC memory +cards. + +.SH COMMAND LINE OPTIONS +Command line options available: +.TP +.BI \-d +Enable debug logging and do not detach from shell. +.TP +.BI \-n +Ignored. +.TP +.BI \-o " options" +File system specific options. For more details see +.B FILE SYSTEM OPTIONS +section below. +.TP +.BI \-V +Print version and copyright. +.TP +.BI \-v +Ignored. + +.SH FILE SYSTEM OPTIONS +.TP +.BI umask= value +Set the umask (the bitmask of the permissions that are +.B not +present, in octal). +The default is 0. +.TP +.BI dmask= value +Set the umask for directories only. +.TP +.BI fmask= value +Set the umask for files only. +.TP +.BI uid= n +Set the owner for all files and directories. +The default is the owner of the current process. +.TP +.BI gid= n +Set the group for all files and directories. +The default is the group of the current process. +.TP +.BI ro +Mount the file system in read only mode. +.TP +.BI noatime +Do not update access time when file is read. + +.SH EXIT CODES +Zero is returned on successful mount. Any other code means an error. + +.SH BUGS +exFAT is a case-insensitive file system. Some things can behave unexpectedly, +e.g. directory renaming that changes only case of some characters: + +.B \t$ mv FOO Foo +.br +.B \tmv: cannot move \(cqFOO\(cq to a subdirectory of itself, \(cqFoo/FOO\(cq + +This happens because +.B mv +finds that destination exists (for case-insensitive file +systems +.B FOO +and +.B Foo +are the same thing) and adds source basename to the destination. The file +system gets +.B rename(\(dqFOO\(dq,\ \(dqFoo/FOO\(dq) +syscall and returns an error. + +.SH AUTHOR +Andrew Nayenko + +.SH SEE ALSO +.BR mount (8) diff --git a/exfat/label/exfatlabel.8 b/exfat/label/exfatlabel.8 new file mode 100644 index 000000000..bff6e7996 --- /dev/null +++ b/exfat/label/exfatlabel.8 @@ -0,0 +1,48 @@ +.\" Copyright (C) 2011-2015 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) diff --git a/exfat/label/main.c b/exfat/label/main.c new file mode 100644 index 000000000..b219d4e65 --- /dev/null +++ b/exfat/label/main.c @@ -0,0 +1,62 @@ +/* + main.c (20.01.11) + Prints or changes exFAT volume label. + + Free exFAT implementation. + Copyright (C) 2011-2015 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 2 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, write to the Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. +*/ + +#include <exfat.h> +#include <stdio.h> +#include <string.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 %s\n", VERSION); + puts("Copyright (C) 2011-2015 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; +} diff --git a/exfat/libexfat/Android.mk b/exfat/libexfat/Android.mk new file mode 100644 index 000000000..64adef742 --- /dev/null +++ b/exfat/libexfat/Android.mk @@ -0,0 +1,11 @@ +LOCAL_PATH := $(call my-dir) +include $(CLEAR_VARS) + +LOCAL_MODULE := libexfat_twrp +LOCAL_MODULE_TAGS := optional +LOCAL_CFLAGS = -D_FILE_OFFSET_BITS=64 -Wno-sign-compare -Wno-address-of-packed-member -Wno-missing-field-initializers +LOCAL_SRC_FILES = cluster.c io.c log.c lookup.c mount.c node.c time.c utf.c utils.c +LOCAL_C_INCLUDES += $(LOCAL_PATH) +LOCAL_SHARED_LIBRARIES += libc + +include $(BUILD_SHARED_LIBRARY) diff --git a/exfat/libexfat/android_config.h b/exfat/libexfat/android_config.h new file mode 100644 index 000000000..09c3346f8 --- /dev/null +++ b/exfat/libexfat/android_config.h @@ -0,0 +1,37 @@ +/* libexfat/config.h. Generated from config.h.in by configure. */ +/* libexfat/config.h.in. Generated from configure.ac by autoheader. */ + +/* Name of package */ +#define PACKAGE "exfat" + +/* Define to the address where bug reports for this package should be sent. */ +#define PACKAGE_BUGREPORT "relan@users.noreply.github.com" + +/* Define to the full name of this package. */ +#define PACKAGE_NAME "Free exFAT implementation" + +/* Define to the full name and version of this package. */ +#define PACKAGE_STRING "Free exFAT implementation 1.2.2" + +/* Define to the one symbol short name of this package. */ +#define PACKAGE_TARNAME "exfat" + +/* Define to the home page for this package. */ +#define PACKAGE_URL "https://github.com/relan/exfat" + +/* Define to the version of this package. */ +#define PACKAGE_VERSION "1.2.2" + +/* Version number of package */ +#define VERSION "1.2.2" + +/* Enable large inode numbers on Mac OS X 10.5. */ +#ifndef _DARWIN_USE_64_BIT_INODE +# define _DARWIN_USE_64_BIT_INODE 1 +#endif + +/* Number of bits in a file offset, on hosts where this is settable. */ +/* #undef _FILE_OFFSET_BITS */ + +/* Define for large files, on AIX-style hosts. */ +/* #undef _LARGE_FILES */ diff --git a/exfat/libexfat/byteorder.h b/exfat/libexfat/byteorder.h new file mode 100644 index 000000000..472cb487c --- /dev/null +++ b/exfat/libexfat/byteorder.h @@ -0,0 +1,68 @@ +/* + byteorder.h (12.01.10) + Endianness stuff. exFAT uses little-endian byte order. + + Free exFAT implementation. + Copyright (C) 2010-2015 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 2 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, write to the Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. +*/ + +#ifndef BYTEORDER_H_INCLUDED +#define BYTEORDER_H_INCLUDED + +#include "platform.h" +#include <stdint.h> +#include <stddef.h> + +typedef struct { uint16_t __u16; } le16_t; +typedef struct { uint32_t __u32; } le32_t; +typedef struct { uint64_t __u64; } le64_t; + +#if EXFAT_BYTE_ORDER == EXFAT_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; } + +typedef size_t bitmap_t; + +#elif EXFAT_BYTE_ORDER == EXFAT_BIG_ENDIAN + +static inline uint16_t le16_to_cpu(le16_t v) + { return exfat_bswap16(v.__u16); } +static inline uint32_t le32_to_cpu(le32_t v) + { return exfat_bswap32(v.__u32); } +static inline uint64_t le64_to_cpu(le64_t v) + { return exfat_bswap64(v.__u64); } + +static inline le16_t cpu_to_le16(uint16_t v) + { le16_t t = {exfat_bswap16(v)}; return t; } +static inline le32_t cpu_to_le32(uint32_t v) + { le32_t t = {exfat_bswap32(v)}; return t; } +static inline le64_t cpu_to_le64(uint64_t v) + { le64_t t = {exfat_bswap64(v)}; return t; } + +typedef unsigned char bitmap_t; + +#else +#error Wow! You have a PDP machine?! +#endif + +#endif /* ifndef BYTEORDER_H_INCLUDED */ diff --git a/exfat/libexfat/cluster.c b/exfat/libexfat/cluster.c new file mode 100644 index 000000000..394ca4a22 --- /dev/null +++ b/exfat/libexfat/cluster.c @@ -0,0 +1,492 @@ +/* + cluster.c (03.09.09) + exFAT file system implementation library. + + Free exFAT implementation. + Copyright (C) 2010-2015 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 2 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, write to the Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. +*/ + +#include "exfat.h" +#include <errno.h> +#include <string.h> +#include <inttypes.h> + +/* + * Sector to absolute offset. + */ +static loff_t s2o(const struct exfat* ef, loff_t sector) +{ + return sector << ef->sb->sector_bits; +} + +/* + * Cluster to sector. + */ +static loff_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) + + ((loff_t) (cluster - EXFAT_FIRST_DATA_CLUSTER) << ef->sb->spc_bits); +} + +/* + * Cluster to absolute offset. + */ +loff_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, loff_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; + loff_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); + if (exfat_pread(ef->dev, &next, sizeof(next), fat_offset) < 0) + return EXFAT_CLUSTER_BAD; /* the caller should handle this and print + appropriate error message */ + 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; /* the caller should handle this and print appropriate + error message */ + } + node->fptr_index = count; + return node->fptr_cluster; +} + +static cluster_t find_bit_and_set(bitmap_t* bitmap, size_t start, size_t end) +{ + const size_t start_index = start / sizeof(bitmap_t) / 8; + const size_t end_index = DIV_ROUND_UP(end, sizeof(bitmap_t) * 8); + size_t i; + size_t start_bitindex; + size_t end_bitindex; + size_t c; + + for (i = start_index; i < end_index; i++) + { + if (bitmap[i] == ~((bitmap_t) 0)) + continue; + start_bitindex = MAX(i * sizeof(bitmap_t) * 8, start); + end_bitindex = MIN((i + 1) * sizeof(bitmap_t) * 8, end); + for (c = start_bitindex; c < end_bitindex; c++) + if (BMAP_GET(bitmap, c) == 0) + { + BMAP_SET(bitmap, c); + return c + EXFAT_FIRST_DATA_CLUSTER; + } + } + return EXFAT_CLUSTER_END; +} + +static int flush_nodes(struct exfat* ef, struct exfat_node* node) +{ + struct exfat_node* p; + + for (p = node->child; p != NULL; p = p->next) + { + int rc = flush_nodes(ef, p); + if (rc != 0) + return rc; + } + return exfat_flush_node(ef, node); +} + +int exfat_flush_nodes(struct exfat* ef) +{ + return flush_nodes(ef, ef->root); +} + +int exfat_flush(struct exfat* ef) +{ + if (ef->cmap.dirty) + { + if (exfat_pwrite(ef->dev, ef->cmap.chunk, + BMAP_SIZE(ef->cmap.chunk_size), + exfat_c2o(ef, ef->cmap.start_cluster)) < 0) + { + exfat_error("failed to write clusters bitmap"); + return -EIO; + } + ef->cmap.dirty = false; + } + + return 0; +} + +static bool set_next_cluster(const struct exfat* ef, bool contiguous, + cluster_t current, cluster_t next) +{ + loff_t fat_offset; + le32_t next_le32; + + if (contiguous) + return true; + fat_offset = s2o(ef, le32_to_cpu(ef->sb->fat_sector_start)) + + current * sizeof(cluster_t); + next_le32 = cpu_to_le32(next); + if (exfat_pwrite(ef->dev, &next_le32, sizeof(next_le32), fat_offset) < 0) + { + exfat_error("failed to write the next cluster %#x after %#x", next, + current); + return false; + } + return true; +} + +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 = true; + return cluster; +} + +static void free_cluster(struct exfat* ef, cluster_t cluster) +{ + if (CLUSTER_INVALID(cluster)) + exfat_bug("freeing invalid cluster 0x%x", cluster); + if (cluster - EXFAT_FIRST_DATA_CLUSTER >= ef->cmap.size) + exfat_bug("freeing non-existing cluster 0x%x (0x%x)", cluster, + ef->cmap.size); + + BMAP_CLR(ef->cmap.chunk, cluster - EXFAT_FIRST_DATA_CLUSTER); + ef->cmap.dirty = true; +} + +static bool make_noncontiguous(const struct exfat* ef, cluster_t first, + cluster_t last) +{ + cluster_t c; + + for (c = first; c < last; c++) + if (!set_next_cluster(ef, false, c, c + 1)) + return false; + return true; +} + +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 0x%x while growing", previous); + 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 */ + if (!make_noncontiguous(ef, node->start_cluster, previous)) + return -EIO; + node->flags &= ~EXFAT_ATTRIB_CONTIGUOUS; + node->flags |= EXFAT_ATTRIB_DIRTY; + } + if (!set_next_cluster(ef, IS_CONTIGUOUS(*node), previous, next)) + return -EIO; + previous = next; + allocated++; + } + + if (!set_next_cluster(ef, IS_CONTIGUOUS(*node), previous, + EXFAT_CLUSTER_END)) + return -EIO; + 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 0x%x while shrinking", last); + return -EIO; + } + previous = exfat_next_cluster(ef, node, last); + if (!set_next_cluster(ef, IS_CONTIGUOUS(*node), last, + EXFAT_CLUSTER_END)) + return -EIO; + } + else + { + previous = node->start_cluster; + node->start_cluster = EXFAT_CLUSTER_FREE; + node->flags |= EXFAT_ATTRIB_DIRTY; + } + node->fptr_index = 0; + node->fptr_cluster = node->start_cluster; + + /* free remaining clusters */ + while (difference--) + { + if (CLUSTER_INVALID(previous)) + { + exfat_error("invalid cluster 0x%x while freeing after shrink", + previous); + return -EIO; + } + next = exfat_next_cluster(ef, node, previous); + if (!set_next_cluster(ef, IS_CONTIGUOUS(*node), previous, + EXFAT_CLUSTER_FREE)) + return -EIO; + free_cluster(ef, previous); + previous = next; + } + return 0; +} + +static bool erase_raw(struct exfat* ef, size_t size, loff_t offset) +{ + if (exfat_pwrite(ef->dev, ef->zero_cluster, size, offset) < 0) + { + exfat_error("failed to erase %zu bytes at %"PRId64, size, offset); + return false; + } + return true; +} + +static int erase_range(struct exfat* ef, struct exfat_node* node, + uint64_t begin, uint64_t end) +{ + uint64_t cluster_boundary; + cluster_t cluster; + + if (begin >= end) + return 0; + + cluster_boundary = (begin | (CLUSTER_SIZE(*ef->sb) - 1)) + 1; + cluster = exfat_advance_cluster(ef, node, + begin / CLUSTER_SIZE(*ef->sb)); + if (CLUSTER_INVALID(cluster)) + { + exfat_error("invalid cluster 0x%x while erasing", cluster); + return -EIO; + } + /* erase from the beginning to the closest cluster boundary */ + if (!erase_raw(ef, MIN(cluster_boundary, end) - begin, + exfat_c2o(ef, cluster) + begin % CLUSTER_SIZE(*ef->sb))) + return -EIO; + /* erase whole clusters */ + while (cluster_boundary < end) + { + cluster = exfat_next_cluster(ef, node, cluster); + /* the cluster cannot be invalid because we have just allocated it */ + if (CLUSTER_INVALID(cluster)) + exfat_bug("invalid cluster 0x%x after allocation", cluster); + if (!erase_raw(ef, CLUSTER_SIZE(*ef->sb), exfat_c2o(ef, cluster))) + return -EIO; + cluster_boundary += CLUSTER_SIZE(*ef->sb); + } + return 0; +} + +int exfat_truncate(struct exfat* ef, struct exfat_node* node, uint64_t size, + bool erase) +{ + 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; + + if (erase) + { + 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, loff_t* a, loff_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; +} diff --git a/exfat/libexfat/compiler.h b/exfat/libexfat/compiler.h new file mode 100644 index 000000000..3b092a9b9 --- /dev/null +++ b/exfat/libexfat/compiler.h @@ -0,0 +1,66 @@ +/* + compiler.h (09.06.13) + Compiler-specific definitions. Note that unknown compiler is not a + showstopper. + + Free exFAT implementation. + Copyright (C) 2010-2015 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 2 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, write to the Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. +*/ + +#ifndef COMPILER_H_INCLUDED +#define COMPILER_H_INCLUDED + +#if defined(__STDC_VERSION__) && (__STDC_VERSION__ < 199901L) +#error C99-compliant compiler is required +#endif + +#if defined(__clang__) + +#define PRINTF __attribute__((format(printf, 1, 2))) +#define NORETURN __attribute__((noreturn)) +#define PACKED __attribute__((packed)) +#if __has_extension(c_static_assert) +#define USE_C11_STATIC_ASSERT +#endif + +#elif defined(__GNUC__) + +#define PRINTF __attribute__((format(printf, 1, 2))) +#define NORETURN __attribute__((noreturn)) +#define PACKED __attribute__((packed)) +#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6) +#define USE_C11_STATIC_ASSERT +#endif + +#else + +#define PRINTF +#define NORETURN +#define PACKED + +#endif + +#ifdef USE_C11_STATIC_ASSERT +#define STATIC_ASSERT(cond) _Static_assert(cond, #cond) +#else +#define CONCAT2(a, b) a ## b +#define CONCAT1(a, b) CONCAT2(a, b) +#define STATIC_ASSERT(cond) \ + extern void CONCAT1(static_assert, __LINE__)(int x[(cond) ? 1 : -1]) +#endif + +#endif /* ifndef COMPILER_H_INCLUDED */ diff --git a/exfat/libexfat/exfat.h b/exfat/libexfat/exfat.h new file mode 100644 index 000000000..009a0c081 --- /dev/null +++ b/exfat/libexfat/exfat.h @@ -0,0 +1,228 @@ +/* + exfat.h (29.08.09) + Definitions of structures and constants used in exFAT file system + implementation. + + Free exFAT implementation. + Copyright (C) 2010-2015 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 2 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, write to the Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. +*/ + +#ifndef EXFAT_H_INCLUDED +#define EXFAT_H_INCLUDED + +#if defined(__ANDROID__) +#include "android_config.h" +#else +#include "config.h" +#endif +#include "compiler.h" +#include "exfatfs.h" +#include <stdio.h> +#include <stdlib.h> +#include <time.h> +#include <stdbool.h> +#include <sys/stat.h> +#include <sys/types.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_FIRST_DATA_CLUSTER || (c) > EXFAT_LAST_DATA_CLUSTER) + +#define MIN(a, b) ((a) < (b) ? (a) : (b)) +#define MAX(a, b) ((a) > (b) ? (a) : (b)) +#define DIV_ROUND_UP(x, d) (((x) + (d) - 1) / (d)) +#define ROUND_UP(x, d) (DIV_ROUND_UP(x, d) * (d)) +#define UTF8_BYTES(c) ((c) * 6) /* UTF-8 character can occupy up to 6 bytes */ + +#define BMAP_SIZE(count) (ROUND_UP(count, sizeof(bitmap_t) * 8) / 8) +#define BMAP_BLOCK(index) ((index) / sizeof(bitmap_t) / 8) +#define BMAP_MASK(index) ((bitmap_t) 1 << ((index) % (sizeof(bitmap_t) * 8))) +#define BMAP_GET(bitmap, index) \ + ((bitmap)[BMAP_BLOCK(index)] & BMAP_MASK(index)) +#define BMAP_SET(bitmap, index) \ + ((bitmap)[BMAP_BLOCK(index)] |= BMAP_MASK(index)) +#define BMAP_CLR(bitmap, index) \ + ((bitmap)[BMAP_BLOCK(index)] &= ~BMAP_MASK(index)) + +/* The size of off_t type must be 64 bits. File systems larger than 2 GB will + be corrupted with 32-bit off_t. So, we use loff_t here.*/ +STATIC_ASSERT(sizeof(loff_t) == 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; + loff_t entry_offset; + cluster_t start_cluster; + int flags; + uint64_t size; + time_t mtime, atime; + le16_t name[EXFAT_NAME_MAX + 1]; +}; + +enum exfat_mode +{ + EXFAT_MODE_RO, + EXFAT_MODE_RW, + EXFAT_MODE_ANY, +}; + +struct exfat_dev; + +struct exfat +{ + struct exfat_dev* dev; + struct exfat_super_block* sb; + le16_t* upcase; + size_t upcase_chars; + struct exfat_node* root; + struct + { + cluster_t start_cluster; + uint32_t size; /* in bits */ + bitmap_t* chunk; + uint32_t chunk_size; /* in bits */ + bool dirty; + } + cmap; + char label[UTF8_BYTES(EXFAT_ENAME_MAX) + 1]; + void* zero_cluster; + int dmask, fmask; + uid_t uid; + gid_t gid; + int ro; + bool 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, ...) PRINTF NORETURN; +void exfat_error(const char* format, ...) PRINTF; +void exfat_warn(const char* format, ...) PRINTF; +void exfat_debug(const char* format, ...) PRINTF; + +struct exfat_dev* exfat_open(const char* spec, enum exfat_mode mode); +int exfat_close(struct exfat_dev* dev); +int exfat_fsync(struct exfat_dev* dev); +enum exfat_mode exfat_get_mode(const struct exfat_dev* dev); +loff_t exfat_get_size(const struct exfat_dev* dev); +loff_t exfat_seek(struct exfat_dev* dev, loff_t offset, int whence); +ssize_t exfat_read(struct exfat_dev* dev, void* buffer, size_t size); +ssize_t exfat_write(struct exfat_dev* dev, const void* buffer, size_t size); +ssize_t exfat_pread(struct exfat_dev* dev, void* buffer, size_t size, + loff_t offset); +ssize_t exfat_pwrite(struct exfat_dev* dev, const void* buffer, size_t size, + loff_t offset); +ssize_t exfat_generic_pread(const struct exfat* ef, struct exfat_node* node, + void* buffer, size_t size, loff_t offset); +ssize_t exfat_generic_pwrite(struct exfat* ef, struct exfat_node* node, + const void* buffer, size_t size, loff_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); + +loff_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); +int exfat_flush_nodes(struct exfat* ef); +int exfat_flush(struct exfat* ef); +int exfat_truncate(struct exfat* ef, struct exfat_node* node, uint64_t size, + bool erase); +uint32_t exfat_count_free_clusters(const struct exfat* ef); +int exfat_find_used_sectors(const struct exfat* ef, loff_t* a, loff_t* b); + +void exfat_stat(const struct exfat* ef, const struct exfat_node* node, + struct stat* stbuf); +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_cleanup_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); +int 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); + +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_tzset(void); + +#endif /* ifndef EXFAT_H_INCLUDED */ diff --git a/exfat/libexfat/exfatfs.h b/exfat/libexfat/exfatfs.h new file mode 100644 index 000000000..eca2cacea --- /dev/null +++ b/exfat/libexfat/exfatfs.h @@ -0,0 +1,175 @@ +/* + exfatfs.h (29.08.09) + Definitions of structures and constants used in exFAT file system. + + Free exFAT implementation. + Copyright (C) 2010-2015 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 2 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, write to the Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. +*/ + +#ifndef EXFATFS_H_INCLUDED +#define EXFATFS_H_INCLUDED + +#include "byteorder.h" +#include "compiler.h" + +typedef uint32_t cluster_t; /* cluster number */ + +#define EXFAT_FIRST_DATA_CLUSTER 2 +#define EXFAT_LAST_DATA_CLUSTER 0xfffffff6 + +#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 */ + +#define EXFAT_STATE_MOUNTED 2 + +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 */ +} +PACKED; +STATIC_ASSERT(sizeof(struct exfat_super_block) == 512); + +#define EXFAT_ENTRY_VALID 0x80 +#define EXFAT_ENTRY_CONTINUED 0x40 +#define EXFAT_ENTRY_OPTIONAL 0x20 + +#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]; +} +PACKED; +STATIC_ASSERT(sizeof(struct exfat_entry) == 32); + +#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 */ +} +PACKED; +STATIC_ASSERT(sizeof(struct exfat_entry_bitmap) == 32); + +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 */ +} +PACKED; +STATIC_ASSERT(sizeof(struct exfat_entry_upcase) == 32); + +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 */ +} +PACKED; +STATIC_ASSERT(sizeof(struct exfat_entry_label) == 32); + +#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]; +} +PACKED; +STATIC_ASSERT(sizeof(struct exfat_entry_meta1) == 32); + +#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 valid_size; /* in bytes, less or equal to size */ + uint8_t __unknown3[4]; + le32_t start_cluster; + le64_t size; /* in bytes */ +} +PACKED; +STATIC_ASSERT(sizeof(struct exfat_entry_meta2) == 32); + +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 */ +} +PACKED; +STATIC_ASSERT(sizeof(struct exfat_entry_name) == 32); + +#endif /* ifndef EXFATFS_H_INCLUDED */ diff --git a/exfat/libexfat/io.c b/exfat/libexfat/io.c new file mode 100644 index 000000000..60aabb5ec --- /dev/null +++ b/exfat/libexfat/io.c @@ -0,0 +1,440 @@ +/* + io.c (02.09.09) + exFAT file system implementation library. + + Free exFAT implementation. + Copyright (C) 2010-2015 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 2 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, write to the Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. +*/ + +#include "exfat.h" +#include <inttypes.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <fcntl.h> +#include <unistd.h> +#include <string.h> +#include <errno.h> +#if defined(__APPLE__) +#include <sys/disk.h> +#elif defined(__OpenBSD__) +#include <sys/param.h> +#include <sys/disklabel.h> +#include <sys/dkio.h> +#include <sys/ioctl.h> +#endif +#include <sys/mount.h> +#ifdef USE_UBLIO +#include <sys/uio.h> +#include <ublio.h> +#endif + +struct exfat_dev +{ + int fd; + enum exfat_mode mode; + loff_t size; /* in bytes */ +#ifdef USE_UBLIO + loff_t pos; + ublio_filehandle_t ufh; +#endif +}; + +static int open_ro(const char* spec) +{ + return open(spec, O_RDONLY); +} + +static int open_rw(const char* spec) +{ + int fd = open(spec, O_RDWR); +#ifdef __linux__ + int ro = 0; + + /* + This ioctl is needed because after "blockdev --setro" kernel still + allows to open the device in read-write mode but fails writes. + */ + if (fd != -1 && ioctl(fd, BLKROGET, &ro) == 0 && ro) + { + close(fd); + errno = EROFS; + return -1; + } +#endif + return fd; +} + +struct exfat_dev* exfat_open(const char* spec, enum exfat_mode mode) +{ + struct exfat_dev* dev; + struct stat stbuf; +#ifdef USE_UBLIO + struct ublio_param up; +#endif + + dev = malloc(sizeof(struct exfat_dev)); + if (dev == NULL) + { + exfat_error("failed to allocate memory for device structure"); + return NULL; + } + + switch (mode) + { + case EXFAT_MODE_RO: + dev->fd = open_ro(spec); + if (dev->fd == -1) + { + free(dev); + exfat_error("failed to open '%s' in read-only mode: %s", spec, + strerror(errno)); + return NULL; + } + dev->mode = EXFAT_MODE_RO; + break; + case EXFAT_MODE_RW: + dev->fd = open_rw(spec); + if (dev->fd == -1) + { + free(dev); + exfat_error("failed to open '%s' in read-write mode: %s", spec, + strerror(errno)); + return NULL; + } + dev->mode = EXFAT_MODE_RW; + break; + case EXFAT_MODE_ANY: + dev->fd = open_rw(spec); + if (dev->fd != -1) + { + dev->mode = EXFAT_MODE_RW; + break; + } + dev->fd = open_ro(spec); + if (dev->fd != -1) + { + dev->mode = EXFAT_MODE_RO; + exfat_warn("'%s' is write-protected, mounting read-only", spec); + break; + } + free(dev); + exfat_error("failed to open '%s': %s", spec, strerror(errno)); + return NULL; + } + + if (fstat(dev->fd, &stbuf) != 0) + { + close(dev->fd); + free(dev); + exfat_error("failed to fstat '%s'", spec); + return NULL; + } + if (!S_ISBLK(stbuf.st_mode) && + !S_ISCHR(stbuf.st_mode) && + !S_ISREG(stbuf.st_mode)) + { + close(dev->fd); + free(dev); + exfat_error("'%s' is neither a device, nor a regular file", spec); + return NULL; + } + +#if defined(__APPLE__) + if (!S_ISREG(stbuf.st_mode)) + { + uint32_t block_size = 0; + uint64_t blocks = 0; + + if (ioctl(dev->fd, DKIOCGETBLOCKSIZE, &block_size) != 0) + { + close(dev->fd); + free(dev); + exfat_error("failed to get block size"); + return NULL; + } + if (ioctl(dev->fd, DKIOCGETBLOCKCOUNT, &blocks) != 0) + { + close(dev->fd); + free(dev); + exfat_error("failed to get blocks count"); + return NULL; + } + dev->size = blocks * block_size; + } + else +#elif defined(__OpenBSD__) + if (!S_ISREG(stbuf.st_mode)) + { + struct disklabel lab; + struct partition* pp; + char* partition; + + if (ioctl(dev->fd, DIOCGDINFO, &lab) == -1) + { + close(dev->fd); + free(dev); + exfat_error("failed to get disklabel"); + return NULL; + } + + /* Don't need to check that partition letter is valid as we won't get + this far otherwise. */ + partition = strchr(spec, '\0') - 1; + pp = &(lab.d_partitions[*partition - 'a']); + dev->size = DL_GETPSIZE(pp) * lab.d_secsize; + + if (pp->p_fstype != FS_NTFS) + exfat_warn("partition type is not 0x07 (NTFS/exFAT); " + "you can fix this with fdisk(8)"); + } + else +#endif + { + /* works for Linux, FreeBSD, Solaris */ + dev->size = exfat_seek(dev, 0, SEEK_END); + if (dev->size <= 0) + { + close(dev->fd); + free(dev); + exfat_error("failed to get size of '%s'", spec); + return NULL; + } + if (exfat_seek(dev, 0, SEEK_SET) == -1) + { + close(dev->fd); + free(dev); + exfat_error("failed to seek to the beginning of '%s'", spec); + return NULL; + } + } + +#ifdef USE_UBLIO + memset(&up, 0, sizeof(struct ublio_param)); + up.up_blocksize = 256 * 1024; + up.up_items = 64; + up.up_grace = 32; + up.up_priv = &dev->fd; + + dev->pos = 0; + dev->ufh = ublio_open(&up); + if (dev->ufh == NULL) + { + close(dev->fd); + free(dev); + exfat_error("failed to initialize ublio"); + return NULL; + } +#endif + + return dev; +} + +int exfat_close(struct exfat_dev* dev) +{ + int rc = 0; + +#ifdef USE_UBLIO + if (ublio_close(dev->ufh) != 0) + { + exfat_error("failed to close ublio"); + rc = -EIO; + } +#endif + if (close(dev->fd) != 0) + { + exfat_error("failed to close device: %s", strerror(errno)); + rc = -EIO; + } + free(dev); + return rc; +} + +int exfat_fsync(struct exfat_dev* dev) +{ + int rc = 0; + +#ifdef USE_UBLIO + if (ublio_fsync(dev->ufh) != 0) + { + exfat_error("ublio fsync failed"); + rc = -EIO; + } +#endif + if (fsync(dev->fd) != 0) + { + exfat_error("fsync failed: %s", strerror(errno)); + rc = -EIO; + } + return rc; +} + +enum exfat_mode exfat_get_mode(const struct exfat_dev* dev) +{ + return dev->mode; +} + +loff_t exfat_get_size(const struct exfat_dev* dev) +{ + return dev->size; +} + +loff_t exfat_seek(struct exfat_dev* dev, loff_t offset, int whence) +{ +#ifdef USE_UBLIO + /* XXX SEEK_CUR will be handled incorrectly */ + return dev->pos = lseek(dev->fd, offset, whence); +#else + return lseek64(dev->fd, offset, whence); +#endif +} + +ssize_t exfat_read(struct exfat_dev* dev, void* buffer, size_t size) +{ +#ifdef USE_UBLIO + ssize_t result = ublio_pread(dev->ufh, buffer, size, dev->pos); + if (result >= 0) + dev->pos += size; + return result; +#else + return read(dev->fd, buffer, size); +#endif +} + +ssize_t exfat_write(struct exfat_dev* dev, const void* buffer, size_t size) +{ +#ifdef USE_UBLIO + ssize_t result = ublio_pwrite(dev->ufh, buffer, size, dev->pos); + if (result >= 0) + dev->pos += size; + return result; +#else + return write(dev->fd, buffer, size); +#endif +} + +ssize_t exfat_pread(struct exfat_dev* dev, void* buffer, size_t size, + loff_t offset) +{ +#ifdef USE_UBLIO + return ublio_pread(dev->ufh, buffer, size, offset); +#else + return pread64(dev->fd, buffer, size, offset); +#endif +} + +ssize_t exfat_pwrite(struct exfat_dev* dev, const void* buffer, size_t size, + loff_t offset) +{ +#ifdef USE_UBLIO + return ublio_pwrite(dev->ufh, buffer, size, offset); +#else + return pwrite64(dev->fd, buffer, size, offset); +#endif +} + +ssize_t exfat_generic_pread(const struct exfat* ef, struct exfat_node* node, + void* buffer, size_t size, loff_t offset) +{ + cluster_t cluster; + char* bufp = buffer; + loff_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("invalid cluster 0x%x while reading", cluster); + return -1; + } + + loffset = offset % CLUSTER_SIZE(*ef->sb); + remainder = MIN(size, node->size - offset); + while (remainder > 0) + { + if (CLUSTER_INVALID(cluster)) + { + exfat_error("invalid cluster 0x%x while reading", cluster); + return -1; + } + lsize = MIN(CLUSTER_SIZE(*ef->sb) - loffset, remainder); + if (exfat_pread(ef->dev, bufp, lsize, + exfat_c2o(ef, cluster) + loffset) < 0) + { + exfat_error("failed to read cluster %#x", cluster); + return -1; + } + bufp += lsize; + loffset = 0; + remainder -= lsize; + cluster = exfat_next_cluster(ef, node, cluster); + } + if (!ef->ro && !ef->noatime) + exfat_update_atime(node); + return MIN(size, node->size - offset) - remainder; +} + +ssize_t exfat_generic_pwrite(struct exfat* ef, struct exfat_node* node, + const void* buffer, size_t size, loff_t offset) +{ + cluster_t cluster; + const char* bufp = buffer; + loff_t lsize, loffset, remainder; + + if (offset > node->size) + if (exfat_truncate(ef, node, offset, true) != 0) + return -1; + if (offset + size > node->size) + if (exfat_truncate(ef, node, offset + size, false) != 0) + return -1; + if (size == 0) + return 0; + + cluster = exfat_advance_cluster(ef, node, offset / CLUSTER_SIZE(*ef->sb)); + if (CLUSTER_INVALID(cluster)) + { + exfat_error("invalid cluster 0x%x while writing", cluster); + return -1; + } + + loffset = offset % CLUSTER_SIZE(*ef->sb); + remainder = size; + while (remainder > 0) + { + if (CLUSTER_INVALID(cluster)) + { + exfat_error("invalid cluster 0x%x while writing", cluster); + return -1; + } + lsize = MIN(CLUSTER_SIZE(*ef->sb) - loffset, remainder); + if (exfat_pwrite(ef->dev, bufp, lsize, + exfat_c2o(ef, cluster) + loffset) < 0) + { + exfat_error("failed to write cluster %#x", cluster); + return -1; + } + bufp += lsize; + loffset = 0; + remainder -= lsize; + cluster = exfat_next_cluster(ef, node, cluster); + } + exfat_update_mtime(node); + return size - remainder; +} diff --git a/exfat/libexfat/log.c b/exfat/libexfat/log.c new file mode 100644 index 000000000..38c79d456 --- /dev/null +++ b/exfat/libexfat/log.c @@ -0,0 +1,114 @@ +/* + log.c (02.09.09) + exFAT file system implementation library. + + Free exFAT implementation. + Copyright (C) 2010-2015 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 2 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, write to the Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. +*/ + +#include "exfat.h" +#include <stdarg.h> +#include <syslog.h> +#include <unistd.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); + + if (!isatty(STDERR_FILENO)) + vsyslog(LOG_CRIT, format, aq); + va_end(aq); + +#if defined(__ANDROID__) + exit(-1); +#else + abort(); +#endif +} + +/* + * 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); + + if (!isatty(STDERR_FILENO)) + 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); + + if (!isatty(STDERR_FILENO)) + 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); +} diff --git a/exfat/libexfat/lookup.c b/exfat/libexfat/lookup.c new file mode 100644 index 000000000..3caef74ab --- /dev/null +++ b/exfat/libexfat/lookup.c @@ -0,0 +1,225 @@ +/* + lookup.c (02.09.09) + exFAT file system implementation library. + + Free exFAT implementation. + Copyright (C) 2010-2015 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 2 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, write to the Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. +*/ + +#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 __unused, 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 bool is_last_comp(const char* comp, size_t length) +{ + const char* p = comp + length; + + return get_comp(p, &p) == 0; +} + +static bool 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 false; + } + return true; +} + +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"); +} diff --git a/exfat/libexfat/mount.c b/exfat/libexfat/mount.c new file mode 100644 index 000000000..45a5d4999 --- /dev/null +++ b/exfat/libexfat/mount.c @@ -0,0 +1,380 @@ +/* + mount.c (22.10.09) + exFAT file system implementation library. + + Free exFAT implementation. + Copyright (C) 2010-2015 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 2 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, write to the Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. +*/ + +#include "exfat.h" +#include <string.h> +#include <stdlib.h> +#include <errno.h> +#include <inttypes.h> +#include <unistd.h> +#include <sys/types.h> + +static uint64_t rootdir_size(const struct exfat* ef) +{ + uint32_t clusters = 0; + uint32_t clusters_max = le32_to_cpu(ef->sb->cluster_count); + cluster_t rootdir_cluster = le32_to_cpu(ef->sb->rootdir_cluster); + + /* Iterate all clusters of the root directory to calculate its size. + It can't be contiguous because there is no flag to indicate this. */ + do + { + if (clusters == clusters_max) /* infinite loop detected */ + { + exfat_error("root directory cannot occupy all %d clusters", + clusters); + return 0; + } + if (CLUSTER_INVALID(rootdir_cluster)) + { + exfat_error("bad cluster %#x while reading root directory", + rootdir_cluster); + return 0; + } + rootdir_cluster = exfat_next_cluster(ef, ef->root, rootdir_cluster); + clusters++; + } + while (rootdir_cluster != EXFAT_CLUSTER_END); + + return (uint64_t) 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 bool 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 true; + return false; +} + +static void parse_options(struct exfat* ef, const char* options) +{ + int opt_umask; + + opt_umask = get_int_option(options, "umask", 8, 0); + ef->dmask = get_int_option(options, "dmask", 8, opt_umask); + ef->fmask = get_int_option(options, "fmask", 8, opt_umask); + + ef->uid = get_int_option(options, "uid", 10, geteuid()); + ef->gid = get_int_option(options, "gid", 10, getegid()); + + ef->noatime = match_option(options, "noatime"); +} + +static bool verify_vbr_checksum(struct exfat_dev* dev, void* sector, + loff_t sector_size) +{ + uint32_t vbr_checksum; + int i; + + if (exfat_pread(dev, sector, sector_size, 0) < 0) + { + exfat_error("failed to read boot sector"); + return false; + } + vbr_checksum = exfat_vbr_start_checksum(sector, sector_size); + for (i = 1; i < 11; i++) + { + if (exfat_pread(dev, sector, sector_size, i * sector_size) < 0) + { + exfat_error("failed to read VBR sector"); + return false; + } + vbr_checksum = exfat_vbr_add_checksum(sector, sector_size, + vbr_checksum); + } + if (exfat_pread(dev, sector, sector_size, i * sector_size) < 0) + { + exfat_error("failed to read VBR checksum sector"); + return false; + } + 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 false; + } + return true; +} + +static int commit_super_block(const struct exfat* ef) +{ + if (exfat_pwrite(ef->dev, ef->sb, sizeof(struct exfat_super_block), 0) < 0) + { + exfat_error("failed to write super block"); + return 1; + } + return exfat_fsync(ef->dev); +} + +static int prepare_super_block(const struct exfat* ef) +{ + if (le16_to_cpu(ef->sb->volume_state) & EXFAT_STATE_MOUNTED) + exfat_warn("volume was not unmounted cleanly"); + + if (ef->ro) + return 0; + + ef->sb->volume_state = cpu_to_le16( + le16_to_cpu(ef->sb->volume_state) | EXFAT_STATE_MOUNTED); + return commit_super_block(ef); +} + +int exfat_mount(struct exfat* ef, const char* spec, const char* options) +{ + int rc; + enum exfat_mode mode; + + exfat_tzset(); + memset(ef, 0, sizeof(struct exfat)); + + parse_options(ef, options); + + if (match_option(options, "ro")) + mode = EXFAT_MODE_RO; + else if (match_option(options, "ro_fallback")) + mode = EXFAT_MODE_ANY; + else + mode = EXFAT_MODE_RW; + ef->dev = exfat_open(spec, mode); + if (ef->dev == NULL) + return -EIO; + if (exfat_get_mode(ef->dev) == EXFAT_MODE_RO) + { + if (mode == EXFAT_MODE_ANY) + ef->ro = -1; + else + ef->ro = 1; + } + + ef->sb = malloc(sizeof(struct exfat_super_block)); + if (ef->sb == NULL) + { + exfat_close(ef->dev); + exfat_error("failed to allocate memory for the super block"); + return -ENOMEM; + } + memset(ef->sb, 0, sizeof(struct exfat_super_block)); + + if (exfat_pread(ef->dev, ef->sb, sizeof(struct exfat_super_block), 0) < 0) + { + exfat_close(ef->dev); + free(ef->sb); + exfat_error("failed to read boot sector"); + return -EIO; + } + if (memcmp(ef->sb->oem_name, "EXFAT ", 8) != 0) + { + exfat_close(ef->dev); + free(ef->sb); + exfat_error("exFAT file system is not found"); + return -EIO; + } + /* sector cannot be smaller than 512 bytes */ + if (ef->sb->sector_bits < 9) + { + exfat_close(ef->dev); + exfat_error("too small sector size: 2^%hhd", ef->sb->sector_bits); + free(ef->sb); + return -EIO; + } + /* officially exFAT supports cluster size up to 32 MB */ + if ((int) ef->sb->sector_bits + (int) ef->sb->spc_bits > 25) + { + exfat_close(ef->dev); + exfat_error("too big cluster size: 2^(%hhd+%hhd)", + ef->sb->sector_bits, ef->sb->spc_bits); + free(ef->sb); + return -EIO; + } + ef->zero_cluster = malloc(CLUSTER_SIZE(*ef->sb)); + if (ef->zero_cluster == NULL) + { + exfat_close(ef->dev); + free(ef->sb); + exfat_error("failed to allocate zero sector"); + return -ENOMEM; + } + /* use zero_cluster as a temporary buffer for VBR checksum verification */ + if (!verify_vbr_checksum(ef->dev, ef->zero_cluster, SECTOR_SIZE(*ef->sb))) + { + free(ef->zero_cluster); + exfat_close(ef->dev); + free(ef->sb); + return -EIO; + } + memset(ef->zero_cluster, 0, CLUSTER_SIZE(*ef->sb)); + if (ef->sb->version.major != 1 || ef->sb->version.minor != 0) + { + free(ef->zero_cluster); + exfat_close(ef->dev); + 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) + { + free(ef->zero_cluster); + exfat_close(ef->dev); + exfat_error("unsupported FAT count: %hhu", ef->sb->fat_count); + free(ef->sb); + return -EIO; + } + if (le64_to_cpu(ef->sb->sector_count) * SECTOR_SIZE(*ef->sb) > + exfat_get_size(ef->dev)) + { + /* this can cause I/O errors later but we don't fail mounting to let + user rescue data */ + exfat_warn("file system is larger than underlying device: " + "%"PRIu64" > %"PRIu64, + le64_to_cpu(ef->sb->sector_count) * SECTOR_SIZE(*ef->sb), + exfat_get_size(ef->dev)); + } + + ef->root = malloc(sizeof(struct exfat_node)); + if (ef->root == NULL) + { + free(ef->zero_cluster); + exfat_close(ef->dev); + 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); + if (ef->root->size == 0) + { + free(ef->root); + free(ef->zero_cluster); + exfat_close(ef->dev); + free(ef->sb); + return -EIO; + } + /* 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; + } + + if (prepare_super_block(ef) != 0) + goto error; + + return 0; + +error: + exfat_put_node(ef, ef->root); + exfat_reset_cache(ef); + free(ef->root); + free(ef->zero_cluster); + exfat_close(ef->dev); + free(ef->sb); + return -EIO; +} + +static void finalize_super_block(struct exfat* ef) +{ + if (ef->ro) + return; + + ef->sb->volume_state = cpu_to_le16( + le16_to_cpu(ef->sb->volume_state) & ~EXFAT_STATE_MOUNTED); + + /* Some implementations set the percentage of allocated space to 0xff + on FS creation and never update it. In this case leave it as is. */ + if (ef->sb->allocated_percent != 0xff) + { + uint32_t free, total; + + free = exfat_count_free_clusters(ef); + total = le32_to_cpu(ef->sb->cluster_count); + ef->sb->allocated_percent = ((total - free) * 100 + total / 2) / total; + } + + commit_super_block(ef); /* ignore return code */ +} + +void exfat_unmount(struct exfat* ef) +{ + exfat_flush_nodes(ef); /* ignore return code */ + exfat_flush(ef); /* ignore return code */ + exfat_put_node(ef, ef->root); + exfat_reset_cache(ef); + free(ef->root); + ef->root = NULL; + finalize_super_block(ef); + exfat_close(ef->dev); /* close descriptor immediately after fsync */ + ef->dev = NULL; + free(ef->zero_cluster); + ef->zero_cluster = NULL; + free(ef->cmap.chunk); + ef->cmap.chunk = NULL; + free(ef->sb); + ef->sb = NULL; + free(ef->upcase); + ef->upcase = NULL; + ef->upcase_chars = 0; +} diff --git a/exfat/libexfat/node.c b/exfat/libexfat/node.c new file mode 100644 index 000000000..e4fd32f31 --- /dev/null +++ b/exfat/libexfat/node.c @@ -0,0 +1,1246 @@ +/* + node.c (09.10.09) + exFAT file system implementation library. + + Free exFAT implementation. + Copyright (C) 2010-2015 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 2 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, write to the Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. +*/ + +#include "exfat.h" +#include <errno.h> +#include <string.h> +#include <inttypes.h> + +/* on-disk nodes iterator */ +struct iterator +{ + cluster_t cluster; + loff_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) +{ + char buffer[UTF8_BYTES(EXFAT_NAME_MAX) + 1]; + + --node->references; + if (node->references < 0) + { + exfat_get_name(node, buffer, sizeof(buffer) - 1); + exfat_bug("reference counter of '%s' is below zero", buffer); + } + else if (node->references == 0 && node != ef->root) + { + if (node->flags & EXFAT_ATTRIB_DIRTY) + { + exfat_get_name(node, buffer, sizeof(buffer) - 1); + exfat_warn("dirty node '%s' with zero references", buffer); + } + } +} + +/** + * This function must be called on rmdir and unlink (after the last + * exfat_put_node()) to free clusters. + */ +int exfat_cleanup_node(struct exfat* ef, struct exfat_node* node) +{ + int rc = 0; + + if (node->references != 0) + exfat_bug("unable to cleanup a node with %d references", + node->references); + + if (node->flags & EXFAT_ATTRIB_UNLINKED) + { + /* free all clusters and node structure itself */ + rc = exfat_truncate(ef, node, 0, true); + /* free the node even in case of error or its memory will be lost */ + free(node); + } + return rc; +} + +/** + * Cluster + offset from the beginning of the directory to absolute offset. + */ +static loff_t co2o(struct exfat* ef, cluster_t cluster, loff_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; + } + if (exfat_pread(ef->dev, it->chunk, CLUSTER_SIZE(*ef->sb), + exfat_c2o(ef, it->cluster)) < 0) + { + exfat_error("failed to read directory cluster %#x", it->cluster); + return -EIO; + } + return 0; +} + +static void closedir(struct iterator* it) +{ + it->cluster = 0; + it->offset = 0; + it->contiguous = 0; + free(it->chunk); + it->chunk = NULL; +} + +static bool 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) + { + /* reached the end of directory; the caller should check this + condition too */ + if (it->offset >= parent->size) + return true; + it->cluster = exfat_next_cluster(ef, parent, it->cluster); + if (CLUSTER_INVALID(it->cluster)) + { + exfat_error("invalid cluster 0x%x while reading directory", + it->cluster); + return false; + } + if (exfat_pread(ef->dev, it->chunk, CLUSTER_SIZE(*ef->sb), + exfat_c2o(ef, it->cluster)) < 0) + { + exfat_error("failed to read the next directory cluster %#x", + it->cluster); + return false; + } + } + return true; +} + +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)); +} + +static bool check_node(const struct exfat_node* node, uint16_t actual_checksum, + uint16_t reference_checksum, uint64_t valid_size) +{ + char buffer[UTF8_BYTES(EXFAT_NAME_MAX) + 1]; + + /* + Validate checksum first. If it's invalid all other fields probably + contain just garbage. + */ + if (actual_checksum != reference_checksum) + { + exfat_get_name(node, buffer, sizeof(buffer) - 1); + exfat_error("'%s' has invalid checksum (%#hx != %#hx)", buffer, + actual_checksum, reference_checksum); + return false; + } + + /* + exFAT does not support sparse files but allows files with uninitialized + clusters. For such files valid_size means initialized data size and + cannot be greater than file size. See SetFileValidData() function + description in MSDN. + */ + if (valid_size > node->size) + { + exfat_get_name(node, buffer, sizeof(buffer) - 1); + exfat_error("'%s' has valid size (%"PRIu64") greater than size " + "(%"PRIu64")", buffer, valid_size, node->size); + return false; + } + + return true; +} + +/* + * 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) +{ + int rc = -EIO; + 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; + uint64_t valid_size = 0; + + *node = NULL; + + for (;;) + { + if (it->offset >= parent->size) + { + if (continuations != 0) + { + exfat_error("expected %hhu continuations", continuations); + goto error; + } + return -ENOENT; /* that's OK, means end of directory */ + } + + entry = get_entry_ptr(ef, it); + switch (entry->type) + { + 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); + goto error; + } + if (continuations > 1 + + DIV_ROUND_UP(EXFAT_NAME_MAX, EXFAT_ENAME_MAX)) + { + exfat_error("too many continuations (%hhu)", continuations); + goto error; + } + reference_checksum = le16_to_cpu(meta1->checksum); + actual_checksum = exfat_start_checksum(meta1); + *node = allocate_node(); + if (*node == NULL) + { + rc = -ENOMEM; + goto error; + } + /* 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); + valid_size = le64_to_cpu(meta2->valid_size); + /* 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) + { + exfat_error("directory has invalid size %"PRIu64" bytes", + (*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, + MIN(EXFAT_ENAME_MAX, + ((*node)->name + EXFAT_NAME_MAX - namep)) * + sizeof(le16_t)); + namep += EXFAT_ENAME_MAX; + if (--continuations == 0) + { + if (!check_node(*node, actual_checksum, reference_checksum, + valid_size)) + goto error; + if (!fetch_next_entry(ef, parent, it)) + 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 0x%x in upcase table", + le32_to_cpu(upcase->start_cluster)); + goto error; + } + 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)); + goto error; + } + 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)); + rc = -ENOMEM; + goto error; + } + ef->upcase_chars = le64_to_cpu(upcase->size) / sizeof(le16_t); + + if (exfat_pread(ef->dev, ef->upcase, le64_to_cpu(upcase->size), + exfat_c2o(ef, le32_to_cpu(upcase->start_cluster))) < 0) + { + exfat_error("failed to read upper case table " + "(%"PRIu64" bytes starting at cluster %#x)", + le64_to_cpu(upcase->size), + le32_to_cpu(upcase->start_cluster)); + goto error; + } + break; + + case EXFAT_ENTRY_BITMAP: + bitmap = (const struct exfat_entry_bitmap*) entry; + ef->cmap.start_cluster = le32_to_cpu(bitmap->start_cluster); + if (CLUSTER_INVALID(ef->cmap.start_cluster)) + { + exfat_error("invalid cluster 0x%x in clusters bitmap", + ef->cmap.start_cluster); + goto error; + } + ef->cmap.size = le32_to_cpu(ef->sb->cluster_count) - + EXFAT_FIRST_DATA_CLUSTER; + if (le64_to_cpu(bitmap->size) < DIV_ROUND_UP(ef->cmap.size, 8)) + { + exfat_error("invalid clusters bitmap size: %"PRIu64 + " (expected at least %u)", + le64_to_cpu(bitmap->size), + DIV_ROUND_UP(ef->cmap.size, 8)); + goto error; + } + /* FIXME bitmap can be rather big, up to 512 MB */ + ef->cmap.chunk_size = ef->cmap.size; + ef->cmap.chunk = malloc(BMAP_SIZE(ef->cmap.chunk_size)); + if (ef->cmap.chunk == NULL) + { + exfat_error("failed to allocate clusters bitmap chunk " + "(%"PRIu64" bytes)", le64_to_cpu(bitmap->size)); + rc = -ENOMEM; + goto error; + } + + if (exfat_pread(ef->dev, ef->cmap.chunk, + BMAP_SIZE(ef->cmap.chunk_size), + exfat_c2o(ef, ef->cmap.start_cluster)) < 0) + { + exfat_error("failed to read clusters bitmap " + "(%"PRIu64" bytes starting at cluster %#x)", + le64_to_cpu(bitmap->size), ef->cmap.start_cluster); + goto error; + } + 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); + goto error; + } + if (utf16_to_utf8(ef->label, label->name, + sizeof(ef->label) - 1, EXFAT_ENAME_MAX) != 0) + goto error; + break; + + default: + if (!(entry->type & EXFAT_ENTRY_VALID)) + break; /* deleted entry, ignore it */ + if (!(entry->type & EXFAT_ENTRY_OPTIONAL)) + { + exfat_error("unknown entry type %#hhx", entry->type); + goto error; + } + /* optional entry, warn and skip */ + exfat_warn("unknown entry type %#hhx", entry->type); + if (continuations == 0) + { + exfat_error("unexpected continuation"); + goto error; + } + --continuations; + break; + } + + if (!fetch_next_entry(ef, parent, it)) + goto error; + } + /* we never reach here */ + +error: + free(*node); + *node = NULL; + return rc; +} + +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 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 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 reset_cache(struct exfat* ef, struct exfat_node* node) +{ + char buffer[UTF8_BYTES(EXFAT_NAME_MAX) + 1]; + + while (node->child) + { + struct exfat_node* p = node->child; + reset_cache(ef, p); + tree_detach(p); + free(p); + } + node->flags &= ~EXFAT_ATTRIB_CACHED; + if (node->references != 0) + { + exfat_get_name(node, buffer, sizeof(buffer) - 1); + exfat_warn("non-zero reference counter (%d) for '%s'", + node->references, buffer); + } + if (node != ef->root && (node->flags & EXFAT_ATTRIB_DIRTY)) + { + exfat_get_name(node, buffer, sizeof(buffer) - 1); + exfat_bug("node '%s' is dirty", buffer); + } + while (node->references) + exfat_put_node(ef, node); +} + +void exfat_reset_cache(struct exfat* ef) +{ + reset_cache(ef, ef->root); +} + +static bool next_entry(struct exfat* ef, const struct exfat_node* parent, + cluster_t* cluster, loff_t* offset) +{ + *offset += sizeof(struct exfat_entry); + if (*offset % CLUSTER_SIZE(*ef->sb) == 0) + { + *cluster = exfat_next_cluster(ef, parent, *cluster); + if (CLUSTER_INVALID(*cluster)) + { + exfat_error("invalid cluster %#x while getting next entry", + *cluster); + return false; + } + } + return true; +} + +int exfat_flush_node(struct exfat* ef, struct exfat_node* node) +{ + cluster_t cluster; + loff_t offset; + loff_t meta1_offset, meta2_offset; + struct exfat_entry_meta1 meta1; + struct exfat_entry_meta2 meta2; + + if (!(node->flags & EXFAT_ATTRIB_DIRTY)) + return 0; /* no need to flush */ + + if (ef->ro) + exfat_bug("unable to flush node to read-only FS"); + + if (node->parent == NULL) + return 0; /* do not flush unlinked node */ + + cluster = node->entry_cluster; + offset = node->entry_offset; + meta1_offset = co2o(ef, cluster, offset); + if (!next_entry(ef, node->parent, &cluster, &offset)) + return -EIO; + meta2_offset = co2o(ef, cluster, offset); + + if (exfat_pread(ef->dev, &meta1, sizeof(meta1), meta1_offset) < 0) + { + exfat_error("failed to read meta1 entry on flush"); + return -EIO; + } + 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); + + if (exfat_pread(ef->dev, &meta2, sizeof(meta2), meta2_offset) < 0) + { + exfat_error("failed to read meta2 entry on flush"); + return -EIO; + } + if (meta2.type != EXFAT_ENTRY_FILE_INFO) + exfat_bug("invalid type of meta2: 0x%hhx", meta2.type); + meta2.size = meta2.valid_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); + + if (exfat_pwrite(ef->dev, &meta1, sizeof(meta1), meta1_offset) < 0) + { + exfat_error("failed to write meta1 entry on flush"); + return -EIO; + } + if (exfat_pwrite(ef->dev, &meta2, sizeof(meta2), meta2_offset) < 0) + { + exfat_error("failed to write meta2 entry on flush"); + return -EIO; + } + + node->flags &= ~EXFAT_ATTRIB_DIRTY; + return exfat_flush(ef); +} + +static bool erase_entry(struct exfat* ef, struct exfat_node* node) +{ + cluster_t cluster = node->entry_cluster; + loff_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; + if (exfat_pwrite(ef->dev, &entry_type, 1, co2o(ef, cluster, offset)) < 0) + { + exfat_error("failed to erase meta1 entry"); + return false; + } + + if (!next_entry(ef, node->parent, &cluster, &offset)) + return false; + entry_type = EXFAT_ENTRY_FILE_INFO & ~EXFAT_ENTRY_VALID; + if (exfat_pwrite(ef->dev, &entry_type, 1, co2o(ef, cluster, offset)) < 0) + { + exfat_error("failed to erase meta2 entry"); + return false; + } + + while (name_entries--) + { + if (!next_entry(ef, node->parent, &cluster, &offset)) + return false; + entry_type = EXFAT_ENTRY_FILE_NAME & ~EXFAT_ENTRY_VALID; + if (exfat_pwrite(ef->dev, &entry_type, 1, + co2o(ef, cluster, offset)) < 0) + { + exfat_error("failed to erase name entry"); + return false; + } + } + return true; +} + +static int shrink_directory(struct exfat* ef, struct exfat_node* dir, + loff_t deleted_offset) +{ + const struct exfat_node* node; + const struct exfat_node* last_node; + uint64_t entries = 0; + uint64_t new_size; + + 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 == 0) /* directory always has at least 1 cluster */ + new_size = CLUSTER_SIZE(*ef->sb); + if (new_size == dir->size) + return 0; + return exfat_truncate(ef, dir, new_size, true); +} + +static int delete(struct exfat* ef, struct exfat_node* node) +{ + struct exfat_node* parent = node->parent; + loff_t deleted_offset = node->entry_offset; + int rc; + + exfat_get_node(parent); + if (!erase_entry(ef, node)) + { + exfat_put_node(ef, parent); + return -EIO; + } + exfat_update_mtime(parent); + tree_detach(node); + rc = shrink_directory(ef, parent, deleted_offset); + node->flags |= EXFAT_ATTRIB_UNLINKED; + if (rc != 0) + { + exfat_flush_node(ef, parent); + exfat_put_node(ef, parent); + return rc; + } + rc = exfat_flush_node(ef, parent); + exfat_put_node(ef, parent); + 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) +{ + int rc; + + if (!(node->flags & EXFAT_ATTRIB_DIR)) + return -ENOTDIR; + /* check that directory is empty */ + rc = exfat_cache_directory(ef, node); + if (rc != 0) + return rc; + 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), true); +} + +static int find_slot(struct exfat* ef, struct exfat_node* dir, + cluster_t* cluster, loff_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_VALID) + contiguous = 0; + else + contiguous++; + if (contiguous == subentries) + break; /* suitable slot is found */ + if (it.offset + sizeof(struct exfat_entry) >= dir->size) + { + rc = grow_directory(ef, dir, dir->size, + (subentries - contiguous) * sizeof(struct exfat_entry)); + if (rc != 0) + { + closedir(&it); + return rc; + } + } + if (!fetch_next_entry(ef, dir, &it)) + { + 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, loff_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; + meta1.mtime_cs = meta1.crtime_cs; /* there is no atime_cs */ + + 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); + + if (exfat_pwrite(ef->dev, &meta1, sizeof(meta1), + co2o(ef, cluster, offset)) < 0) + { + exfat_error("failed to write meta1 entry"); + return -EIO; + } + if (!next_entry(ef, dir, &cluster, &offset)) + return -EIO; + if (exfat_pwrite(ef->dev, &meta2, sizeof(meta2), + co2o(ef, cluster, offset)) < 0) + { + exfat_error("failed to write meta2 entry"); + return -EIO; + } + 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, + MIN(EXFAT_ENAME_MAX, EXFAT_NAME_MAX - i * EXFAT_ENAME_MAX) * + sizeof(le16_t)); + if (!next_entry(ef, dir, &cluster, &offset)) + return -EIO; + if (exfat_pwrite(ef->dev, &name_entry, sizeof(name_entry), + co2o(ef, cluster, offset)) < 0) + { + exfat_error("failed to write name entry"); + return -EIO; + } + } + + 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; + loff_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); + if (rc != 0) + { + exfat_put_node(ef, dir); + return rc; + } + rc = exfat_flush_node(ef, dir); + 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_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), true); + if (rc != 0) + { + delete(ef, node); + exfat_put_node(ef, node); + return rc; + } + rc = exfat_flush_node(ef, node); + if (rc != 0) + { + delete(ef, node); + exfat_put_node(ef, node); + return rc; + } + exfat_put_node(ef, node); + return 0; +} + +static int rename_entry(struct exfat* ef, struct exfat_node* dir, + struct exfat_node* node, const le16_t* name, cluster_t new_cluster, + loff_t new_offset) +{ + struct exfat_entry_meta1 meta1; + struct exfat_entry_meta2 meta2; + cluster_t old_cluster = node->entry_cluster; + loff_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; + + if (exfat_pread(ef->dev, &meta1, sizeof(meta1), + co2o(ef, old_cluster, old_offset)) < 0) + { + exfat_error("failed to read meta1 entry on rename"); + return -EIO; + } + if (!next_entry(ef, node->parent, &old_cluster, &old_offset)) + return -EIO; + if (exfat_pread(ef->dev, &meta2, sizeof(meta2), + co2o(ef, old_cluster, old_offset)) < 0) + { + exfat_error("failed to read meta2 entry on rename"); + return -EIO; + } + 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); + + if (!erase_entry(ef, node)) + return -EIO; + + node->entry_cluster = new_cluster; + node->entry_offset = new_offset; + + if (exfat_pwrite(ef->dev, &meta1, sizeof(meta1), + co2o(ef, new_cluster, new_offset)) < 0) + { + exfat_error("failed to write meta1 entry on rename"); + return -EIO; + } + if (!next_entry(ef, dir, &new_cluster, &new_offset)) + return -EIO; + if (exfat_pwrite(ef->dev, &meta2, sizeof(meta2), + co2o(ef, new_cluster, new_offset)) < 0) + { + exfat_error("failed to write meta2 entry on rename"); + return -EIO; + } + + 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)); + if (!next_entry(ef, dir, &new_cluster, &new_offset)) + return -EIO; + if (exfat_pwrite(ef->dev, &name_entry, sizeof(name_entry), + co2o(ef, new_cluster, new_offset)) < 0) + { + exfat_error("failed to write name entry on rename"); + return -EIO; + } + } + + memcpy(node->name, name, (EXFAT_NAME_MAX + 1) * sizeof(le16_t)); + tree_detach(node); + tree_attach(dir, node); + return 0; +} + +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; + loff_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; + } + + /* check that target is not a subdirectory of the source */ + if (node->flags & EXFAT_ATTRIB_DIR) + { + struct exfat_node* p; + + for (p = dir; p; p = p->parent) + if (node == p) + { + if (existing != NULL) + exfat_put_node(ef, existing); + exfat_put_node(ef, dir); + exfat_put_node(ef, node); + return -EINVAL; + } + } + + if (existing != NULL) + { + /* remove target if it's not the same node as source */ + if (existing != node) + { + 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; + } + } + else + exfat_put_node(ef, existing); + } + + 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; + } + rc = rename_entry(ef, dir, node, name, cluster, offset); + exfat_put_node(ef, dir); + exfat_put_node(ef, node); + return rc; +} + +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, loff_t* offset) +{ + struct iterator it; + int rc; + + rc = opendir(ef, ef->root, &it); + if (rc != 0) + return rc; + + for (;;) + { + if (it.offset >= ef->root->size) + { + closedir(&it); + return -ENOENT; + } + + if (get_entry_ptr(ef, &it)->type == EXFAT_ENTRY_LABEL) + { + *cluster = it.cluster; + *offset = it.offset; + closedir(&it); + return 0; + } + + if (!fetch_next_entry(ef, ef->root, &it)) + { + 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; + loff_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; + + if (exfat_pwrite(ef->dev, &entry, sizeof(struct exfat_entry_label), + co2o(ef, cluster, offset)) < 0) + { + exfat_error("failed to write label entry"); + return -EIO; + } + strcpy(ef->label, label); + return 0; +} diff --git a/exfat/libexfat/platform.h b/exfat/libexfat/platform.h new file mode 100644 index 000000000..d2ad6d134 --- /dev/null +++ b/exfat/libexfat/platform.h @@ -0,0 +1,63 @@ +/* + platform.h (14.05.13) + OS-specific code (libc-specific in fact). Note that systems with the + same kernel can use different libc implementations. + + Free exFAT implementation. + Copyright (C) 2010-2015 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 2 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, write to the Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. +*/ + +#ifndef PLATFORM_H_INCLUDED +#define PLATFORM_H_INCLUDED + +#if defined(__linux__) || defined(__GLIBC__) || defined(__GNU__) + +#include <endian.h> +#include <byteswap.h> +#define exfat_bswap16(x) bswap_16(x) +#define exfat_bswap32(x) bswap_32(x) +#define exfat_bswap64(x) bswap_64(x) +#define EXFAT_BYTE_ORDER __BYTE_ORDER +#define EXFAT_LITTLE_ENDIAN __LITTLE_ENDIAN +#define EXFAT_BIG_ENDIAN __BIG_ENDIAN + +#elif defined(__APPLE__) + +#include <machine/endian.h> +#include <libkern/OSByteOrder.h> +#define exfat_bswap16(x) OSSwapInt16(x) +#define exfat_bswap32(x) OSSwapInt32(x) +#define exfat_bswap64(x) OSSwapInt64(x) +#define EXFAT_BYTE_ORDER BYTE_ORDER +#define EXFAT_LITTLE_ENDIAN LITTLE_ENDIAN +#define EXFAT_BIG_ENDIAN BIG_ENDIAN + +#elif defined(__ANDROID__) || defined(__FreeBSD__) || defined(__DragonFlyBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) + +#include <sys/endian.h> +#define exfat_bswap16(x) bswap16(x) +#define exfat_bswap32(x) bswap32(x) +#define exfat_bswap64(x) bswap64(x) +#define EXFAT_BYTE_ORDER _BYTE_ORDER +#define EXFAT_LITTLE_ENDIAN _LITTLE_ENDIAN +#define EXFAT_BIG_ENDIAN _BIG_ENDIAN + +#else +#error Unknown platform +#endif + +#endif /* ifndef PLATFORM_H_INCLUDED */ diff --git a/exfat/libexfat/time.c b/exfat/libexfat/time.c new file mode 100644 index 000000000..45c4aff65 --- /dev/null +++ b/exfat/libexfat/time.c @@ -0,0 +1,158 @@ +/* + time.c (03.02.12) + exFAT file system implementation library. + + Free exFAT implementation. + Copyright (C) 2010-2015 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 2 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, write to the Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. +*/ + +#include "exfat.h" + +/* timezone offset from UTC in seconds; positive for western timezones, + negative for eastern ones */ +static long exfat_timezone; + +#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 & 0x3f; /* 6 bits, 0-59 */ + uint16_t hour = ntime >> 11; /* 5 bits, 0-23 */ + + if (day == 0 || month == 0 || month > 12) + { + exfat_error("bad date %u-%02hu-%02hu", + year + EXFAT_EPOCH_YEAR, month, day); + return 0; + } + if (hour > 23 || min > 59 || twosec > 29) + { + exfat_error("bad time %hu:%02hu:%02u", + 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 += exfat_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 + exfat_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_tzset(void) +{ + time_t now; + + tzset(); + now = time(NULL); + exfat_timezone = mktime(gmtime(&now)) - now; +} diff --git a/exfat/libexfat/utf.c b/exfat/libexfat/utf.c new file mode 100644 index 000000000..6f14882e8 --- /dev/null +++ b/exfat/libexfat/utf.c @@ -0,0 +1,231 @@ +/* + utf.c (13.09.09) + exFAT file system implementation library. + + Free exFAT implementation. + Copyright (C) 2010-2015 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 2 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, write to the Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. +*/ + +#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); + *wc += 0x10000; + 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; + wc -= 0x10000; + 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; +} diff --git a/exfat/libexfat/utils.c b/exfat/libexfat/utils.c new file mode 100644 index 000000000..39d708e6e --- /dev/null +++ b/exfat/libexfat/utils.c @@ -0,0 +1,179 @@ +/* + utils.c (04.09.09) + exFAT file system implementation library. + + Free exFAT implementation. + Copyright (C) 2010-2015 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 2 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, write to the Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. +*/ + +#include "exfat.h" +#include <string.h> +#include <stdio.h> +#include <inttypes.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; + /* set ctime to mtime to ensure we don't break programs that rely on ctime + (e.g. rsync) */ + stbuf->st_ctime = node->mtime; +} + +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, + MIN(EXFAT_ENAME_MAX, EXFAT_NAME_MAX - i * 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; + /* 16 EB (minus 1 byte) is the largest size that can be represented by + uint64_t */ + const char* units[] = {"bytes", "KB", "MB", "GB", "TB", "PB", "EB"}; + uint64_t divisor = 1; + uint64_t temp = 0; + + for (i = 0; ; i++, divisor *= 1024) + { + temp = (value + divisor / 2) / divisor; + + if (temp == 0) + break; + if (temp / 1024 * 1024 == temp) + continue; + if (temp < 10240) + break; + } + hb->value = temp; + hb->unit = units[i]; +} + +void exfat_print_info(const struct exfat_super_block* sb, + uint32_t free_clusters) +{ + struct exfat_human_bytes hb; + loff_t total_space = le64_to_cpu(sb->sector_count) * SECTOR_SIZE(*sb); + loff_t avail_space = (loff_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); +} diff --git a/exfat/mkfs/Android.mk b/exfat/mkfs/Android.mk new file mode 100644 index 000000000..9f3e7cb5b --- /dev/null +++ b/exfat/mkfs/Android.mk @@ -0,0 +1,16 @@ +LOCAL_PATH := $(call my-dir) +include $(CLEAR_VARS) + +LOCAL_MODULE := mkexfatfs +LOCAL_MODULE_CLASS := RECOVERY_EXECUTABLES +LOCAL_MODULE_TAGS := optional +LOCAL_MODULE_PATH := $(TARGET_RECOVERY_ROOT_OUT)/sbin +LOCAL_CFLAGS = -D_FILE_OFFSET_BITS=64 -Wno-sign-compare +LOCAL_SRC_FILES = cbm.c fat.c main.c mkexfat.c rootdir.c uct.c uctc.c vbr.c +LOCAL_C_INCLUDES += $(LOCAL_PATH) \ + $(commands_recovery_local_path)/exfat/libexfat \ + $(commands_recovery_local_path)/fuse/include +LOCAL_SHARED_LIBRARIES := libexfat_twrp +LOCAL_STATIC_LIBRARIES := libfusetwrp + +include $(BUILD_EXECUTABLE) diff --git a/exfat/mkfs/cbm.c b/exfat/mkfs/cbm.c new file mode 100644 index 000000000..eb67592fd --- /dev/null +++ b/exfat/mkfs/cbm.c @@ -0,0 +1,79 @@ +/* + cbm.c (09.11.10) + Clusters Bitmap creation code. + + Free exFAT implementation. + Copyright (C) 2011-2015 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 2 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, write to the Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. +*/ + +#include "cbm.h" +#include "fat.h" +#include "uct.h" +#include "rootdir.h" +#include <limits.h> +#include <string.h> + +static loff_t cbm_alignment(void) +{ + return get_cluster_size(); +} + +static loff_t cbm_size(void) +{ + return DIV_ROUND_UP( + (get_volume_size() - get_position(&cbm)) / get_cluster_size(), + CHAR_BIT); +} + +static int cbm_write(struct exfat_dev* dev) +{ + uint32_t allocated_clusters = + DIV_ROUND_UP(cbm.get_size(), get_cluster_size()) + + DIV_ROUND_UP(uct.get_size(), get_cluster_size()) + + DIV_ROUND_UP(rootdir.get_size(), get_cluster_size()); + size_t bitmap_size = ROUND_UP(allocated_clusters, CHAR_BIT); + bitmap_t* bitmap = malloc(BMAP_SIZE(bitmap_size)); + size_t i; + + if (bitmap == NULL) + { + exfat_error("failed to allocate bitmap of %zu bytes", + BMAP_SIZE(bitmap_size)); + return 1; + } + memset(bitmap, 0, BMAP_SIZE(bitmap_size)); + + for (i = 0; i < bitmap_size; i++) + if (i < allocated_clusters) + BMAP_SET(bitmap, i); + if (exfat_write(dev, bitmap, bitmap_size / CHAR_BIT) < 0) + { + free(bitmap); + exfat_error("failed to write bitmap of %zu bytes", + bitmap_size / CHAR_BIT); + return 1; + } + free(bitmap); + return 0; +} + +const struct fs_object cbm = +{ + .get_alignment = cbm_alignment, + .get_size = cbm_size, + .write = cbm_write, +}; diff --git a/exfat/mkfs/cbm.h b/exfat/mkfs/cbm.h new file mode 100644 index 000000000..414b0d722 --- /dev/null +++ b/exfat/mkfs/cbm.h @@ -0,0 +1,30 @@ +/* + cbm.h (09.11.10) + Clusters Bitmap creation code. + + Free exFAT implementation. + Copyright (C) 2011-2015 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 2 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, write to the Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. +*/ + +#ifndef MKFS_CBM_H_INCLUDED +#define MKFS_CBM_H_INCLUDED + +#include "mkexfat.h" + +extern const struct fs_object cbm; + +#endif /* ifndef MKFS_CBM_H_INCLUDED */ diff --git a/exfat/mkfs/fat.c b/exfat/mkfs/fat.c new file mode 100644 index 000000000..d8dff2bee --- /dev/null +++ b/exfat/mkfs/fat.c @@ -0,0 +1,88 @@ +/* + fat.c (09.11.10) + File Allocation Table creation code. + + Free exFAT implementation. + Copyright (C) 2011-2015 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 2 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, write to the Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. +*/ + +#include "fat.h" +#include "cbm.h" +#include "uct.h" +#include "rootdir.h" +#include <unistd.h> + +static loff_t fat_alignment(void) +{ + return (loff_t) 128 * get_sector_size(); +} + +static loff_t fat_size(void) +{ + return get_volume_size() / get_cluster_size() * sizeof(cluster_t); +} + +static cluster_t fat_write_entry(struct exfat_dev* dev, cluster_t cluster, + cluster_t value) +{ + le32_t fat_entry = cpu_to_le32(value); + if (exfat_write(dev, &fat_entry, sizeof(fat_entry)) < 0) + { + exfat_error("failed to write FAT entry 0x%x", value); + return 0; + } + return cluster + 1; +} + +static cluster_t fat_write_entries(struct exfat_dev* dev, cluster_t cluster, + uint64_t length) +{ + cluster_t end = cluster + DIV_ROUND_UP(length, get_cluster_size()); + + while (cluster < end - 1) + { + cluster = fat_write_entry(dev, cluster, cluster + 1); + if (cluster == 0) + return 0; + } + return fat_write_entry(dev, cluster, EXFAT_CLUSTER_END); +} + +static int fat_write(struct exfat_dev* dev) +{ + cluster_t c = 0; + + if (!(c = fat_write_entry(dev, c, 0xfffffff8))) /* media type */ + return 1; + if (!(c = fat_write_entry(dev, c, 0xffffffff))) /* some weird constant */ + return 1; + if (!(c = fat_write_entries(dev, c, cbm.get_size()))) + return 1; + if (!(c = fat_write_entries(dev, c, uct.get_size()))) + return 1; + if (!(c = fat_write_entries(dev, c, rootdir.get_size()))) + return 1; + + return 0; +} + +const struct fs_object fat = +{ + .get_alignment = fat_alignment, + .get_size = fat_size, + .write = fat_write, +}; diff --git a/exfat/mkfs/fat.h b/exfat/mkfs/fat.h new file mode 100644 index 000000000..9370cf399 --- /dev/null +++ b/exfat/mkfs/fat.h @@ -0,0 +1,30 @@ +/* + fat.h (09.11.10) + File Allocation Table creation code. + + Free exFAT implementation. + Copyright (C) 2011-2015 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 2 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, write to the Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. +*/ + +#ifndef MKFS_FAT_H_INCLUDED +#define MKFS_FAT_H_INCLUDED + +#include "mkexfat.h" + +extern const struct fs_object fat; + +#endif /* ifndef MKFS_FAT_H_INCLUDED */ diff --git a/exfat/mkfs/main.c b/exfat/mkfs/main.c new file mode 100644 index 000000000..43bc0fbea --- /dev/null +++ b/exfat/mkfs/main.c @@ -0,0 +1,255 @@ +/* + main.c (15.08.10) + Creates exFAT file system. + + Free exFAT implementation. + Copyright (C) 2011-2015 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 2 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, write to the Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. +*/ + +#include "mkexfat.h" +#include "vbr.h" +#include "fat.h" +#include "cbm.h" +#include "uct.h" +#include "rootdir.h" +#include <exfat.h> +#include <sys/types.h> +#include <sys/time.h> +#include <unistd.h> +#include <inttypes.h> +#include <stdio.h> +#include <string.h> +#include <limits.h> + +const struct fs_object* objects[] = +{ + &vbr, + &vbr, + &fat, + /* clusters heap */ + &cbm, + &uct, + &rootdir, + NULL, +}; + +static struct +{ + int sector_bits; + int spc_bits; + loff_t volume_size; + le16_t volume_label[EXFAT_ENAME_MAX + 1]; + uint32_t volume_serial; + uint64_t first_sector; +} +param; + +int get_sector_bits(void) +{ + return param.sector_bits; +} + +int get_spc_bits(void) +{ + return param.spc_bits; +} + +loff_t get_volume_size(void) +{ + return param.volume_size; +} + +const le16_t* get_volume_label(void) +{ + return param.volume_label; +} + +uint32_t get_volume_serial(void) +{ + return param.volume_serial; +} + +uint64_t get_first_sector(void) +{ + return param.first_sector; +} + +int get_sector_size(void) +{ + return 1 << get_sector_bits(); +} + +int get_cluster_size(void) +{ + return get_sector_size() << get_spc_bits(); +} + +static int setup_spc_bits(int sector_bits, int user_defined, loff_t volume_size) +{ + int i; + + if (user_defined != -1) + { + loff_t cluster_size = 1 << sector_bits << user_defined; + if (volume_size / cluster_size > EXFAT_LAST_DATA_CLUSTER) + { + struct exfat_human_bytes chb, vhb; + + exfat_humanize_bytes(cluster_size, &chb); + exfat_humanize_bytes(volume_size, &vhb); + exfat_error("cluster size %"PRIu64" %s is too small for " + "%"PRIu64" %s volume, try -s %d", + chb.value, chb.unit, + vhb.value, vhb.unit, + 1 << setup_spc_bits(sector_bits, -1, volume_size)); + return -1; + } + return user_defined; + } + + if (volume_size < 256ull * 1024 * 1024) + return MAX(0, 12 - sector_bits); /* 4 KB */ + if (volume_size < 32ull * 1024 * 1024 * 1024) + return MAX(0, 15 - sector_bits); /* 32 KB */ + + for (i = 17; ; i++) /* 128 KB or more */ + if (DIV_ROUND_UP(volume_size, 1 << i) <= EXFAT_LAST_DATA_CLUSTER) + return MAX(0, i - sector_bits); +} + +static int setup_volume_label(le16_t label[EXFAT_ENAME_MAX + 1], const char* s) +{ + memset(label, 0, (EXFAT_ENAME_MAX + 1) * sizeof(le16_t)); + if (s == NULL) + return 0; + return utf8_to_utf16(label, s, EXFAT_ENAME_MAX, strlen(s)); +} + +static uint32_t setup_volume_serial(uint32_t user_defined) +{ + struct timeval now; + + if (user_defined != 0) + return user_defined; + + if (gettimeofday(&now, NULL) != 0) + { + exfat_error("failed to form volume id"); + return 0; + } + return (now.tv_sec << 20) | now.tv_usec; +} + +static int setup(struct exfat_dev* dev, int sector_bits, int spc_bits, + const char* volume_label, uint32_t volume_serial, + uint64_t first_sector) +{ + param.sector_bits = sector_bits; + param.first_sector = first_sector; + param.volume_size = exfat_get_size(dev); + + param.spc_bits = setup_spc_bits(sector_bits, spc_bits, param.volume_size); + if (param.spc_bits == -1) + return 1; + + if (setup_volume_label(param.volume_label, volume_label) != 0) + return 1; + + param.volume_serial = setup_volume_serial(volume_serial); + if (param.volume_serial == 0) + return 1; + + return mkfs(dev, param.volume_size); +} + +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; + int opt; + int spc_bits = -1; + const char* volume_label = NULL; + uint32_t volume_serial = 0; + uint64_t first_sector = 0; + struct exfat_dev* dev; + + printf("mkexfatfs %s\n", VERSION); + + while ((opt = getopt(argc, argv, "i:n:p:s:V")) != -1) + { + switch (opt) + { + case 'i': + volume_serial = strtol(optarg, NULL, 16); + break; + case 'n': + volume_label = optarg; + break; + case 'p': + first_sector = strtoll(optarg, NULL, 10); + break; + case 's': + spc_bits = logarithm2(atoi(optarg)); + if (spc_bits < 0) + { + exfat_error("invalid option value: '%s'", optarg); + return 1; + } + break; + case 'V': + puts("Copyright (C) 2011-2015 Andrew Nayenko"); + return 0; + default: + usage(argv[0]); + break; + } + } + if (argc - optind != 1) + usage(argv[0]); + spec = argv[optind]; + + dev = exfat_open(spec, EXFAT_MODE_RW); + if (dev == NULL) + return 1; + if (setup(dev, 9, spc_bits, volume_label, volume_serial, + first_sector) != 0) + { + exfat_close(dev); + return 1; + } + if (exfat_close(dev) != 0) + return 1; + printf("File system created successfully.\n"); + return 0; +} diff --git a/exfat/mkfs/mkexfat.c b/exfat/mkfs/mkexfat.c new file mode 100644 index 000000000..0929062be --- /dev/null +++ b/exfat/mkfs/mkexfat.c @@ -0,0 +1,162 @@ +/* + mkexfat.c (22.04.12) + FS creation engine. + + Free exFAT implementation. + Copyright (C) 2011-2015 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 2 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, write to the Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. +*/ + +#include "mkexfat.h" +#include <sys/types.h> +#include <unistd.h> +#include <inttypes.h> +#include <stdio.h> +#include <string.h> + +static int check_size(loff_t volume_size) +{ + const struct fs_object** pp; + loff_t position = 0; + + for (pp = objects; *pp; pp++) + { + position = ROUND_UP(position, (*pp)->get_alignment()); + position += (*pp)->get_size(); + } + + if (position > volume_size) + { + struct exfat_human_bytes vhb; + + exfat_humanize_bytes(volume_size, &vhb); + exfat_error("too small device (%"PRIu64" %s)", vhb.value, vhb.unit); + return 1; + } + + return 0; + +} + +static int erase_object(struct exfat_dev* dev, const void* block, + size_t block_size, loff_t start, loff_t size) +{ + const loff_t block_count = DIV_ROUND_UP(size, block_size); + loff_t i; + + if (exfat_seek(dev, start, SEEK_SET) == (loff_t) -1) + { + exfat_error("seek to 0x%"PRIx64" failed", start); + return 1; + } + for (i = 0; i < size; i += block_size) + { + if (exfat_write(dev, block, MIN(size - i, block_size)) < 0) + { + exfat_error("failed to erase block %"PRIu64"/%"PRIu64 + " at 0x%"PRIx64, i + 1, block_count, start); + return 1; + } + } + return 0; +} + +static int erase(struct exfat_dev* dev) +{ + const struct fs_object** pp; + loff_t position = 0; + const size_t block_size = 1024 * 1024; + void* block = malloc(block_size); + + if (block == NULL) + { + exfat_error("failed to allocate erase block of %zu bytes", block_size); + return 1; + } + memset(block, 0, block_size); + + for (pp = objects; *pp; pp++) + { + position = ROUND_UP(position, (*pp)->get_alignment()); + if (erase_object(dev, block, block_size, position, + (*pp)->get_size()) != 0) + { + free(block); + return 1; + } + position += (*pp)->get_size(); + } + + free(block); + return 0; +} + +static int create(struct exfat_dev* dev) +{ + const struct fs_object** pp; + loff_t position = 0; + + for (pp = objects; *pp; pp++) + { + position = ROUND_UP(position, (*pp)->get_alignment()); + if (exfat_seek(dev, position, SEEK_SET) == (loff_t) -1) + { + exfat_error("seek to 0x%"PRIx64" failed", position); + return 1; + } + if ((*pp)->write(dev) != 0) + return 1; + position += (*pp)->get_size(); + } + return 0; +} + +int mkfs(struct exfat_dev* dev, loff_t volume_size) +{ + if (check_size(volume_size) != 0) + return 1; + + fputs("Creating... ", stdout); + fflush(stdout); + if (erase(dev) != 0) + return 1; + if (create(dev) != 0) + return 1; + puts("done."); + + fputs("Flushing... ", stdout); + fflush(stdout); + if (exfat_fsync(dev) != 0) + return 1; + puts("done."); + + return 0; +} + +loff_t get_position(const struct fs_object* object) +{ + const struct fs_object** pp; + loff_t position = 0; + + for (pp = objects; *pp; pp++) + { + position = ROUND_UP(position, (*pp)->get_alignment()); + if (*pp == object) + return position; + position += (*pp)->get_size(); + } + exfat_bug("unknown object"); +} diff --git a/exfat/mkfs/mkexfat.h b/exfat/mkfs/mkexfat.h new file mode 100644 index 000000000..6e15c59e4 --- /dev/null +++ b/exfat/mkfs/mkexfat.h @@ -0,0 +1,49 @@ +/* + mkexfat.h (09.11.10) + FS creation engine. + + Free exFAT implementation. + Copyright (C) 2011-2015 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 2 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, write to the Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. +*/ + +#ifndef MKFS_MKEXFAT_H_INCLUDED +#define MKFS_MKEXFAT_H_INCLUDED + +#include <exfat.h> + +struct fs_object +{ + loff_t (*get_alignment)(void); + loff_t (*get_size)(void); + int (*write)(struct exfat_dev* dev); +}; + +extern const struct fs_object* objects[]; + +int get_sector_bits(void); +int get_spc_bits(void); +loff_t get_volume_size(void); +const le16_t* get_volume_label(void); +uint32_t get_volume_serial(void); +uint64_t get_first_sector(void); +int get_sector_size(void); +int get_cluster_size(void); + +int mkfs(struct exfat_dev* dev, loff_t volume_size); +loff_t get_position(const struct fs_object* object); + +#endif /* ifndef MKFS_MKEXFAT_H_INCLUDED */ diff --git a/exfat/mkfs/mkexfatfs.8 b/exfat/mkfs/mkexfatfs.8 new file mode 100644 index 000000000..e3394688d --- /dev/null +++ b/exfat/mkfs/mkexfatfs.8 @@ -0,0 +1,71 @@ +.\" Copyright (C) 2011-2015 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 partition on the device. Note that if +this is an MBR partition then the file system type should be set to 0x07 +(NTFS/exFAT) otherwise other operating systems may refuse to mount the +file system. + +.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), fdisk (8) diff --git a/exfat/mkfs/rootdir.c b/exfat/mkfs/rootdir.c new file mode 100644 index 000000000..33ac3f979 --- /dev/null +++ b/exfat/mkfs/rootdir.c @@ -0,0 +1,102 @@ +/* + rootdir.c (09.11.10) + Root directory creation code. + + Free exFAT implementation. + Copyright (C) 2011-2015 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 2 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, write to the Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. +*/ + +#include "rootdir.h" +#include "uct.h" +#include "cbm.h" +#include "uctc.h" +#include <string.h> + +static loff_t rootdir_alignment(void) +{ + return get_cluster_size(); +} + +static loff_t rootdir_size(void) +{ + return get_cluster_size(); +} + +static void init_label_entry(struct exfat_entry_label* label_entry) +{ + memset(label_entry, 0, sizeof(struct exfat_entry_label)); + label_entry->type = EXFAT_ENTRY_LABEL ^ EXFAT_ENTRY_VALID; + + if (utf16_length(get_volume_label()) == 0) + return; + + memcpy(label_entry->name, get_volume_label(), + EXFAT_ENAME_MAX * sizeof(le16_t)); + label_entry->length = utf16_length(get_volume_label()); + label_entry->type |= EXFAT_ENTRY_VALID; +} + +static void init_bitmap_entry(struct exfat_entry_bitmap* bitmap_entry) +{ + memset(bitmap_entry, 0, sizeof(struct exfat_entry_bitmap)); + bitmap_entry->type = EXFAT_ENTRY_BITMAP; + bitmap_entry->start_cluster = cpu_to_le32(EXFAT_FIRST_DATA_CLUSTER); + bitmap_entry->size = cpu_to_le64(cbm.get_size()); +} + +static void init_upcase_entry(struct exfat_entry_upcase* upcase_entry) +{ + size_t i; + uint32_t sum = 0; + + for (i = 0; i < sizeof(upcase_table); i++) + sum = ((sum << 31) | (sum >> 1)) + upcase_table[i]; + + memset(upcase_entry, 0, sizeof(struct exfat_entry_upcase)); + upcase_entry->type = EXFAT_ENTRY_UPCASE; + upcase_entry->checksum = cpu_to_le32(sum); + upcase_entry->start_cluster = cpu_to_le32( + (get_position(&uct) - get_position(&cbm)) / get_cluster_size() + + EXFAT_FIRST_DATA_CLUSTER); + upcase_entry->size = cpu_to_le64(sizeof(upcase_table)); +} + +static int rootdir_write(struct exfat_dev* dev) +{ + struct exfat_entry_label label_entry; + struct exfat_entry_bitmap bitmap_entry; + struct exfat_entry_upcase upcase_entry; + + init_label_entry(&label_entry); + init_bitmap_entry(&bitmap_entry); + init_upcase_entry(&upcase_entry); + + if (exfat_write(dev, &label_entry, sizeof(struct exfat_entry)) < 0) + return 1; + if (exfat_write(dev, &bitmap_entry, sizeof(struct exfat_entry)) < 0) + return 1; + if (exfat_write(dev, &upcase_entry, sizeof(struct exfat_entry)) < 0) + return 1; + return 0; +} + +const struct fs_object rootdir = +{ + .get_alignment = rootdir_alignment, + .get_size = rootdir_size, + .write = rootdir_write, +}; diff --git a/exfat/mkfs/rootdir.h b/exfat/mkfs/rootdir.h new file mode 100644 index 000000000..56db5b026 --- /dev/null +++ b/exfat/mkfs/rootdir.h @@ -0,0 +1,30 @@ +/* + rootdir.h (09.11.10) + Root directory creation code. + + Free exFAT implementation. + Copyright (C) 2011-2015 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 2 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, write to the Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. +*/ + +#ifndef MKFS_ROOTDIR_H_INCLUDED +#define MKFS_ROOTDIR_H_INCLUDED + +#include "mkexfat.h" + +extern const struct fs_object rootdir; + +#endif /* ifndef MKFS_ROOTDIR_H_INCLUDED */ diff --git a/exfat/mkfs/uct.c b/exfat/mkfs/uct.c new file mode 100644 index 000000000..14fa56fc7 --- /dev/null +++ b/exfat/mkfs/uct.c @@ -0,0 +1,52 @@ +/* + uct.c (09.11.10) + Upper Case Table creation code. + + Free exFAT implementation. + Copyright (C) 2011-2015 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 2 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, write to the Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. +*/ + +#include "uct.h" +#include "uctc.h" + +static loff_t uct_alignment(void) +{ + return get_cluster_size(); +} + +static loff_t uct_size(void) +{ + return sizeof(upcase_table); +} + +static int uct_write(struct exfat_dev* dev) +{ + if (exfat_write(dev, upcase_table, sizeof(upcase_table)) < 0) + { + exfat_error("failed to write upcase table of %zu bytes", + sizeof(upcase_table)); + return 1; + } + return 0; +} + +const struct fs_object uct = +{ + .get_alignment = uct_alignment, + .get_size = uct_size, + .write = uct_write, +}; diff --git a/exfat/mkfs/uct.h b/exfat/mkfs/uct.h new file mode 100644 index 000000000..3a08db967 --- /dev/null +++ b/exfat/mkfs/uct.h @@ -0,0 +1,30 @@ +/* + uct.h (09.11.10) + Upper Case Table creation code. + + Free exFAT implementation. + Copyright (C) 2011-2015 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 2 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, write to the Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. +*/ + +#ifndef MKFS_UCT_H_INCLUDED +#define MKFS_UCT_H_INCLUDED + +#include "mkexfat.h" + +extern const struct fs_object uct; + +#endif /* ifndef MKFS_UCT_H_INCLUDED */ diff --git a/exfat/mkfs/uctc.c b/exfat/mkfs/uctc.c new file mode 100644 index 000000000..5849f3777 --- /dev/null +++ b/exfat/mkfs/uctc.c @@ -0,0 +1,757 @@ +/* + uctc.c (30.04.12) + Upper Case Table contents. + + Free exFAT implementation. + Copyright (C) 2011-2015 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 2 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, write to the Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. +*/ + +#include "uctc.h" + +uint8_t upcase_table[5836] = +{ + 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, 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Table declaration. + + Free exFAT implementation. + Copyright (C) 2011-2015 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 2 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, write to the Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. +*/ + +#ifndef MKFS_UCTC_H_INCLUDED +#define MKFS_UCTC_H_INCLUDED + +#include <stdint.h> + +extern uint8_t upcase_table[5836]; + +#endif /* ifndef MKFS_UCTC_H_INCLUDED */ diff --git a/exfat/mkfs/vbr.c b/exfat/mkfs/vbr.c new file mode 100644 index 000000000..a45cc9003 --- /dev/null +++ b/exfat/mkfs/vbr.c @@ -0,0 +1,148 @@ +/* + vbr.c (09.11.10) + Volume Boot Record creation code. + + Free exFAT implementation. + Copyright (C) 2011-2015 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 2 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, write to the Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. +*/ + +#include "vbr.h" +#include "fat.h" +#include "cbm.h" +#include "uct.h" +#include "rootdir.h" +#include <string.h> + +static loff_t vbr_alignment(void) +{ + return get_sector_size(); +} + +static loff_t vbr_size(void) +{ + return 12 * get_sector_size(); +} + +static void init_sb(struct exfat_super_block* sb) +{ + uint32_t clusters_max; + uint32_t fat_sectors; + + clusters_max = get_volume_size() / get_cluster_size(); + fat_sectors = DIV_ROUND_UP((loff_t) clusters_max * sizeof(cluster_t), + get_sector_size()); + + 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(get_first_sector()); + sb->sector_count = cpu_to_le64(get_volume_size() / get_sector_size()); + sb->fat_sector_start = cpu_to_le32( + fat.get_alignment() / get_sector_size()); + sb->fat_sector_count = cpu_to_le32(ROUND_UP( + le32_to_cpu(sb->fat_sector_start) + fat_sectors, + 1 << get_spc_bits()) - + le32_to_cpu(sb->fat_sector_start)); + sb->cluster_sector_start = cpu_to_le32( + get_position(&cbm) / get_sector_size()); + sb->cluster_count = cpu_to_le32(clusters_max - + ((le32_to_cpu(sb->fat_sector_start) + + le32_to_cpu(sb->fat_sector_count)) >> get_spc_bits())); + sb->rootdir_cluster = cpu_to_le32( + (get_position(&rootdir) - get_position(&cbm)) / get_cluster_size() + + EXFAT_FIRST_DATA_CLUSTER); + sb->volume_serial = cpu_to_le32(get_volume_serial()); + sb->version.major = 1; + sb->version.minor = 0; + sb->volume_state = cpu_to_le16(0); + sb->sector_bits = get_sector_bits(); + sb->spc_bits = get_spc_bits(); + sb->fat_count = 1; + sb->drive_no = 0x80; + sb->allocated_percent = 0; + sb->boot_signature = cpu_to_le16(0xaa55); +} + +static int vbr_write(struct exfat_dev* dev) +{ + struct exfat_super_block sb; + uint32_t checksum; + le32_t* sector = malloc(get_sector_size()); + size_t i; + + if (sector == NULL) + { + exfat_error("failed to allocate sector-sized block of memory"); + return 1; + } + + init_sb(&sb); + if (exfat_write(dev, &sb, sizeof(struct exfat_super_block)) < 0) + { + free(sector); + exfat_error("failed to write super block sector"); + return 1; + } + checksum = exfat_vbr_start_checksum(&sb, sizeof(struct exfat_super_block)); + + memset(sector, 0, get_sector_size()); + sector[get_sector_size() / sizeof(sector[0]) - 1] = + cpu_to_le32(0xaa550000); + for (i = 0; i < 8; i++) + { + if (exfat_write(dev, sector, get_sector_size()) < 0) + { + free(sector); + exfat_error("failed to write a sector with boot signature"); + return 1; + } + checksum = exfat_vbr_add_checksum(sector, get_sector_size(), checksum); + } + + memset(sector, 0, get_sector_size()); + for (i = 0; i < 2; i++) + { + if (exfat_write(dev, sector, get_sector_size()) < 0) + { + free(sector); + exfat_error("failed to write an empty sector"); + return 1; + } + checksum = exfat_vbr_add_checksum(sector, get_sector_size(), checksum); + } + + for (i = 0; i < get_sector_size() / sizeof(sector[0]); i++) + sector[i] = cpu_to_le32(checksum); + if (exfat_write(dev, sector, get_sector_size()) < 0) + { + free(sector); + exfat_error("failed to write checksum sector"); + return 1; + } + + free(sector); + return 0; +} + +const struct fs_object vbr = +{ + .get_alignment = vbr_alignment, + .get_size = vbr_size, + .write = vbr_write, +}; diff --git a/exfat/mkfs/vbr.h b/exfat/mkfs/vbr.h new file mode 100644 index 000000000..74e60e50c --- /dev/null +++ b/exfat/mkfs/vbr.h @@ -0,0 +1,30 @@ +/* + vbr.h (09.11.10) + Volume Boot Record creation code. + + Free exFAT implementation. + Copyright (C) 2011-2015 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 2 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, write to the Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. +*/ + +#ifndef MKFS_VBR_H_INCLUDED +#define MKFS_VBR_H_INCLUDED + +#include "mkexfat.h" + +extern const struct fs_object vbr; + +#endif /* ifndef MKFS_VBR_H_INCLUDED */ |