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2022-11-18filemap xattr: simplify error handling, freeingDavid Oberhollenzer
- Some of the error/cleanup paths are merged. - Struct fields don't have to be set to NULL if the entire struct is free'd immediately after. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2022-11-18libsqfs: Fix an overzealous bounds check in the block processorDavid Oberhollenzer
When (during fragment deduplication) a fragment block is read back from disk and unpacked, it can happen that it is _exactly_ the given block size. The bounds check did '>=' instead of '>' and failed in that case with a "data corruption" error. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2022-11-18libsqfs: Initialize the return value in sqfs_compressor_createDavid Oberhollenzer
Initialize the output compressor pointer to NULL, so if the function fails, the value is propperly initialized to a NULL pointer instead of relying on the function user to initialize it. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2022-11-18Add a single, central base64 decoderDavid Oberhollenzer
Similar to the hex blob decoder, we need this once for tar and once for the filemap xattr parser. Simply add a single, central implementation to libutil, with a simple unit test, and then use it in both libtar and gensquashfs. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2022-11-18Add a single, central hex blob decoderDavid Oberhollenzer
Since we need it twice (once for tar, once for the filemap xattr parser), add a single, central implementation to libutil, add a unit test for that implementation and then use it in both libtar and gensquashfs. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2022-11-16filemap xattr: Add a test caseDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2022-11-16filemap xattr: move data structures to mkfs.hDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2022-11-07implement parser for xattr files as produced by getfattr --dump XXXEnno Boland
2022-11-04Only use available CPUsWessel Dankers
Not all CPUs may be available for the current process. Some CPUs may be offline, others may not be included in the process affinity mask. In such cases too many threads will be created, which will then compete unnecessarily for CPU time. Use sched_getaffinity() to determine the correct number of threads to create.
2022-11-04Fix typo in block count statisticsDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2022-11-04Fix: update mempool accounting when freeing an objectDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2022-10-10block writer: further cleanup of the block writer logicDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2022-09-20block writer: move block comaprison to utility functionDavid Oberhollenzer
Slightly modify the byte-for-byte comparison function to compare an arbitrary range in a file and move it to libutil. Instead of calling it for each block in the block writer, simply let it check an entire range in the block writer and compute the range position/size of the reference ahead, before looking for potential matches. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2022-09-20block writer: remove open coded arrayDavid Oberhollenzer
Instead of open coding it, use the array_t type from libutil. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2022-08-31Hardlink search: report error if cannonicalization failsDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2022-08-31Fix: documentation: directory header inode number signednessDavid Oberhollenzer
A directory listing starts with a header that specifies a reference inode number. Each entry then specifies a difference from that reference value. While the difference is _signed_, the reference value is _unsigned_. This is handled correctly in the code, but was pointent out wrongly in the documentation. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2022-08-23Cleanup gzip range clamping codeDavid Oberhollenzer
The zlib library uses a typedef'd uInt type for ranges which may be smaller than size_t. The complicated clamping to the uInt range is technically not needed, as the buffer size can grow at most to BUFSZ anyway, and it also confuses coverity. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2022-08-23Check sqfs_tree_node_get_path return value in rdsquashfs error pathDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2022-08-23Bump coverity versionDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2022-08-20Return an error number from sqfs_tree_find_hard_linksDavid Oberhollenzer
Instead of printing error messages to stderr, simply return an error number instead, that the caller then prints out using sqfs_perror. The underlying rbtree already uses sqfs error numbers, so little change is needed here. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2022-08-20Overhaul tar compression test script, add to corpora test setDavid Oberhollenzer
- Make the script faster by unpacking everything at once instead of file-by-file - Also compare symlinks and directories - More verbose output Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2022-07-08Cleanup: Get rid of libfstree "internal.h" headerDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2022-07-08Cleanup: move source date epoch code back to libutilDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2022-07-08Cleanup: move filename_sane & canonicalize_path functions to libutilDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2022-07-08Add test case for sqfs_tree_node_get_pathDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2022-07-08Make sqfs_tree_node_get_path more robustDavid Oberhollenzer
Test against various invariants: - Every non-root node must have a name - The root node muts not have a name - The name must not be ".." or "." - The name must not contain '/' - The loop that chases parent pointers must terminate, i.e. we must never reach the starting state again (link loop). Furthermore, make sure the sum of all path components plus separators does not overflow. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2022-07-08Move sqfs_tree_node_get_path to libsquashfsDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2022-07-08Cleanup: move inode_stat to sqfs2tarDavid Oberhollenzer
After trying removing many instances of `struct stat`, there is only one user of inode_stat left, so move the function there. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2022-07-08Cleanup: move mkdir_p from libcommon to libutilDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2022-07-08Cleanup: move test.h to libutilDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2022-07-08Cleanup: split libtar header, move to sub directoryDavid Oberhollenzer
Some of the on-disk format internals are moved to a separate header and some of the stuff from internal.h is moved to that format header. C++ guards are added in addtion. Everything PAX related is moved to pax_header.c, some internal functions are marked as static. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2022-07-08Cleanup: rename libfstream to libio, split headersDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2022-07-08Cleanup: move libutil headers to sub directoryDavid Oberhollenzer
Move all the libutil stuff from the toplevel include/ to a util/ sub directory and fix up the includes that make use of them. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2022-07-08Fix: libfstree: actually use a full 32 bit hard link counterDavid Oberhollenzer
The squashfs on-disk format uses 32 bit link counters, but the fstree used 16 bit ones. Because the link count also includes child nodes, this artificially limited the number of entries in a directory to ~64k files. This patch removes the limit by switching libfstree to 32 bit counters. Reported-by: Marvin Renich <mrvn@renich.org> Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2022-07-08Fix: libfstree: double free in error pathDavid Oberhollenzer
If fstree_mknode fails, because the parent link count would overflow, the function fails and cleans up behind it. The problem arises because the function does this check *after* inserting the node in the parent node, so it is later free'd again, when destroying the rest of the tree. This patch moves the insertion after the check to mitigate the problem. Reported-by: Marvin Renich <mrvn@renich.org> Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2022-06-03Fix: libfstree: free() path string in error code pathDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2022-06-03Update github Code-QL workflowDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2022-06-03Roll autoconf version back to a less ambitious oneDavid Oberhollenzer
Autoconf 2.69 was released in 2012. After that, 2.70 was released in December 2020 and 2.71 in January 2021. According to repology, only very few distros ship 2.7x, most still being on 2.69. This includes the last Ubuntu LTS release, which is used as goto container distro in our automated testing and analysis setup. Version 2.69 should cover most distros, except some outliers like CentOS 6 or Maemo Fremantle (*cough* Nokia N900). Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2022-06-03Bump autotools versionDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2022-06-03Typo fixDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2022-06-02Cleanup: libsqfs: simplify state handling in dir readerDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2022-06-02Cleanup: libsqfs: sqfs_dir_reader_find_by_pathDavid Oberhollenzer
Split out several repated patterns into helper functions and move the rest of the code back into dir_reader.c Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2022-06-02Cleanup: libsqfs: merge dir cache code back into dir_reader.cDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2022-06-02Cleanup: libsqfs: move directory iteration out of the directory readerDavid Oberhollenzer
Add a simple directory state object to the meta data reader and use that to iterate directory entries. The code for reading the directory listing is movde to readdir.c Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2022-06-01Fix: libsqfs: do not report out of bounds positions from meta readerDavid Oberhollenzer
When asking the meta data reader for its current position and we *just* read to the end of a block, report the start of the next block as the current location. Otherwise, trying to *seek* to the resulting position immediately after reporting throws an out-of-bounds error. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2022-04-24Add check to autogen.sh for required toolsDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2022-04-23configure: Abort/fail if there is not compressor libraryDavid Oberhollenzer
Implement a check that verifies that we have at least a single SquashFS block compressor available and aborst the build if none was found. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2022-04-10Remove builtin copy of zlibDavid Oberhollenzer
On GNU/Linux, *BSD or MacOS we can simply use the system default library. The copy was primarily only there for the Windows build. The build script for Windows has now been adapted to download and compile a shared library from a tarball. This removes a huge chunk of code from the git tree as well as the release tarballs. Additionally it gets rid of iffy things like removing the Zlib copyright/version strings, so the libsquashfs DLL doesn't export it. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2022-04-10For the Windows build, compile a shared zlib from a source tarballDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2022-04-10Upgrade Zstd version for pre-built Windows binariesDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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