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2020-05-29Block processor: add flags to manage hashing & sparse block detectionDavid Oberhollenzer
This commit adds 2 new user settable flags to the block processor: - A flag to ignore sparse blocks and treat them like normal data blocks. - A flag to disable checksum computation altogether. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-05-29Support associating a user pointer with data blocksDavid Oberhollenzer
This commit modifies the block processor to support associating a user data pointer with data blocks that it forwards to the block writer, which is modified to accept an optional user data pointer. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-05-29Make the block processor inode management optionalDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-05-29Turn the sqfs_block_writer_t into an interfaceDavid Oberhollenzer
This way, everything that could be done through the hooks (and more) can be done by simply providign a custom implementation. The result is a lot clener that the previous hook based version. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-05-29cleanup: libsqfs: eliminate block writer statisticsDavid Oberhollenzer
- the "bytes submitted" can be moved over to the block processor - the number of blocks submitted are already there (implcitily, by adding the data block count to the fragment block count) - actual data bytes written can be computed from the super block - the remaining block count can be changed to simple counter that can be obtained through a function. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-05-29cleanup: libsqfs: remove hooks from sqfs_block_writer_tDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-05-21hash table: switch to sqfs_* types, mark functions as hiddenDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-05-21Fix the semantics of the super block deduplicationDavid Oberhollenzer
Its purely informational, but make sure other programs don't print out scary messages that imply the data has been ineficiently. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-05-19Cleanup: move hash table header to include directoryDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-05-07Fix compilation on GCC4 and belowBrandon Maier
When compiling with GCC4 the following error occurs. > lib/util/rbtree.c:140: undefined reference to `__builtin_uaddl_overflow' This is because __builtin_uaddl_overflow() and the other __builtin_u{add,mul}{,l,ll}_overflow() functions are only defined in GNUC < 5 for Clang. When using GCC4 and below they are not defined. Since the SZ_ADD_OV and SZ_MUL_OV are only used to check 'size_t' type values. And overflow on add and multiply of unsigned types is defined behaviour (C Standard 6.2.5 paragraph 9). It's simple to write overflow functions for this specific case. These are based on the overflow wrappers from the SEI CERT C Standard INT30-C. [1] https://gcc.gnu.org/gcc-5/changes.html Signed-off-by: Brandon Maier <brandon.maier@rockwellcollins.com>
2020-05-04Expose more fine grained control values & flags on the XZ compressorDavid Oberhollenzer
This patch allows external users to fiddle with the XZ compressors compression strength, alignment and other values. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-04-22Skip PAX global headersDavid Oberhollenzer
Tar archives can contain set two kinds of PAX headers: - local headers that modify the attributes of the next file - global headers that set defaults for all files The later is used "... not widely used", according to tar(5) and has been deliberately not implemented. Some programs (e.g. git-archive) *do* generate them (in the case of git, it stores the commit hash). This commit adds a code path that skips a PAX global header entirely and resumes tar parsing, instead of erroneusly reporting it as an entry. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-04-16tar2sqfs & gensquashfs: Delete the output file on failureDavid Oberhollenzer
This commit changes the tar2sqfs & gensquashfs code to pass the exit status on to sqfs_writer_cleanup in libcommon. The function sqfs writer code in libcommon is changed to retain the output file name and delete it if the status passed to the cleanup function is anything other than EXIT_SUCCESS. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-04-16Propperly cast void pointer in sqfs_object_t inline functionDavid Oberhollenzer
Otherwise, C++ compilers will scream. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-03-22doxygen: fix some minor typosDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-03-22doxygen: propperly label generic inode helper functions as membersDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-03-18Cleanup: Move xxhash32 code to libutilDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-03-10Fix the printf format specifies (again)David Oberhollenzer
The PRIu64 et al are missing a "%" sign in front. Fixes: aaf7e68c75a907c3c08e83dfd2972665a0f1c1a3 Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-03-05Get rid of sqfs_compressor_existsDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-03-05Change the signature of sqfs_compressor_create to return an error codeDavid Oberhollenzer
Make sure the function has a way of telling the caller *why* it failed. This way, the function can convey whether it had an internal error, an allocation failure, whether the arguments are totaly nonsensical, or simply that the compressor *or specific configuration* is not supported. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-03-05Cleanup: Remove the E_ prefix from all libsquashfs enumeratorsDavid Oberhollenzer
Avoid namespace polution. Make sure all exportet symbols are prefixed with either sqfs_ or SQFS_. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-03-04Cleanup: match xattr reader API closer to id table APIDavid Oberhollenzer
Instead of creating everything in the "create" function, cleanup and create/initialize stuff in a "load" function. This allows the xattr reader to be reset/re-used and adds the benefit of not having to lug around references to the super block, compressor and file (altough the later two are hidden inside the meta reader). Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-03-04Add a generic copying mechanism to sqfs_object_tDavid Oberhollenzer
This patch adds a deep-copy callback to sqfs_object_t and removes the copying mechanism from sqfs_compressor_t. This is also interesting for other types. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-03-04Add a deep copy function for the str_table_t helperDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-03-01Add a "do not deduplicate" block flagDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-03-01Fix printf format specifies for sqfs_u64David Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-02-27Add a function to the compressor interface to get the configurationDavid Oberhollenzer
This allows getting the compressor configuration back after creating it, for various purposes. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-02-23Remove the sqfs_inode_copy functionDavid Oberhollenzer
With unified payload size counters, copying an inode is now trivial. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-02-23Turn file inode management completely over to the block processorDavid Oberhollenzer
If the block processor allocates and dynamically resizes inodes on the fly, we can add data indefinitely without knowing the size of the file ahead of time. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-02-23Unify the payload counters in the sqfs_inode_generic_tDavid Oberhollenzer
Instead of having seperate counters for blocks, dir index bytes and having to fiddle out the link target size, simply use a single value that stores the number of payload bytes used. A seperate "payload bytes available" is used for dynamically growing inodes during processing. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-02-22Add a seperate sqfs_block_processor_sync functionDavid Oberhollenzer
This function waits for all pending blocks to be written to disk, but doesn't flush the fragment block, so processing can continue afterwards as if nothing happened. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-02-22Add a very simple red-black tree implementationDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-02-21Cleanup: move utilities back out of libsquashfsDavid Oberhollenzer
This commit removes the allocation helpers and string table functions out of libsquashfs back into a "libutil.a". The problem of libsquashfs exporting stuff that it shouldn't is resolved by retaining the internal attributes and directly adding the source to libsquashfs instead of trying to somehow link against libutil.la. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-02-15Move block block accounting to the other end of the block pipelineDavid Oberhollenzer
This commit moves all of the fragment/block accounting in the block processor over to the writing end of the pipeline. In order to do this, the sparse blocks are allowed to bubble through the pipeline. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-02-15Add a "sequence error" to libsquashfs error codesDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-02-12Implement a more explicit object systemDavid Oberhollenzer
Make every dynamically allocated, opaque data structure inherit from a common sqfs_object_t structure with common entry points (e.g. destroy). This removes tons of public API functions and replaces them with a simple sqfs_destroy instead. If semantics of the (until now implicit) object system need to be extended, it can be much more conveniantely done this way. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-02-12Cleanup: Move sqfs_block_t to block processor internalsDavid Oberhollenzer
It was basically built around the block processor and exposed way too many internals. Removing it from other places was mostly trivial. This commit completely removes it from the public API and even most of the libsquashfs internals. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-02-12Remove usage of sqfs_block_t from block readerDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-02-12Clenaup: remove useage of sqfs_block_t from block writerDavid Oberhollenzer
The sqfs_block_t structure has been written for the block processor and exposes way too many internals. This commit removes its usage from the block writer, cutting it down to the bare essentials, so the structure can be removed from the public API later on. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-02-11Document the block writer API.David Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-02-10Cleanup: remove block hooks entirely from block processorDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-02-10Cleanup: remove the fragment store/discard and block discard hooksDavid Oberhollenzer
There is no obvious non-footgun use for those other than tallying statistics, which is now done by the data structures themselves. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-02-10Cleanup statistics print outDavid Oberhollenzer
- Give a rounded input/output byte count. - Seperate groups by new lines. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-02-10Cleanup: Use stat structs instead of hooks in tar2sqfs/gensquashfsDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-02-10Add run time statistics to the block writer and processorDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-02-09Move block writer and fragment table management out of block processorDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-01-31Split the block writing/deduplication away from the block processorDavid Oberhollenzer
This commit moves the entire block writing and deduplication of data blocks over to a different data type named "block writer". For simplicity, the interfaces of the block processor are left as is and are turned into warppers. Likewise, most of the code in the block writer is just verbatim from the block processor, to be cleaned up in subsequent commits. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-01-29Rename sqfs_data_writer_t back to sqfs_block_processor_tDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-01-26Cleanup: Move fragment deduplication code over to fragment tableDavid Oberhollenzer
This removes further clutter from the data writer. Any future efforts on making fragment by hash lookup faster can focus on that area only and don't clutter the block processor. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-01-24Add a fragment table primitive to libsquashfsDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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