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2019-06-11Split process_file functionDavid Oberhollenzer
Add a generic one that reads and processes N bytes from an input file descriptor. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-06-11Major cleanup of mkfs block processorDavid Oberhollenzer
This commit tries to make the block and fragment processing code a lot more readable by simplifying it as follows. The following pattern is used repeatedly: - Try to compress a block - Write the compressed if smaller (the original otherwise) to a file - Print errors on the way - Set the magic (1 << 24) flag if we wrote the original - Increment the super block byte counter => Move that to a seperate function called "write_compressed" => Move the code to grow the fragment table is moved to a seperate function. => Clearing the fragment buffer is pointless, so remove that The add_fragment/add_block functions are now trivial => Merge them into process_file => Global block counter no longer needed, so remove that too Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-06-11cleanup: mark input pointer on write_retry as constDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-06-11cleanup: remove the linked list of fragment relationsDavid Oberhollenzer
Don't need that, we already know the index when we write add the fragment. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-06-11fix: flush the last, unfinished fragment block as wellDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-06-11cleanup: remove unused prototypesDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-06-10cleanup: move tree deserialization to libsqfs.aDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-06-10Rename table.h to highlevel.hDavid Oberhollenzer
The idea is to move various higher level helper functions there. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-06-10Add generic function to produce a full path from an fstree nodeDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-06-10cleanup: move entire fstree serialization to libsqfs.aDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-06-10Make sqfs_write_inodes independend of sqfs_info_tDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-06-10cleanup: move write_inode to separate fileDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-06-10Generate a flat inode table from the fstree ahead of timeDavid Oberhollenzer
Instead of allocating inode numbers as we go, generate and populat an inode table from the fstree ahead of time. This makes processing nodes a little bit simpler and we will need that table anyway for NFS export support later on. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-06-10cleanup: move directory serialization to separate fileDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-06-10gensquashfs: do pushd/popd when needed instead of chdirDavid Oberhollenzer
This commit replaces the chdir to the input directory with pushd/popd when building the fstree and again when packing files. This simplifies handling of other file paths given on the command line that have to be accessed and are relative to the original working directories. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-06-10Add pushd/popd utilityDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-06-09Add workaround to make empty directories with xattrs workDavid Oberhollenzer
The problem: SquashFS uses extended inode types for inodes with xattrs, so for directories we need to generate an ldir inode. The ldir inode type includes a directory index which cannot be empty (the counter is off by 1, so 0 means 1 entry) and the entry is expected to contain a file name with the same issue (must be at least 1 byte). This has probably not really been thought through. What the mksquashfs actually does is generating an ldir inode without an index. The kernel does not bother to read the index, since the size of the directory is 0. Its a hack that just so happens to work. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-06-08Replace e-mail addressv0.1David Oberhollenzer
I did this in my spare time, so replace the company address with the infraroot.at address. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-06-07Update README fileDavid Oberhollenzer
Remove agressive remarks and give credit where credit is due. Generally express thinks in a more positive way. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-05-31Update documentationDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-05-31gensquashfs: allow combining packdir and packfileDavid Oberhollenzer
If packdir and packfile are both specified, use packdir as alternate root. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-05-31gensquashfs: chdir into directory where the input file liesDavid Oberhollenzer
This makes path handling a lot easier. We no longer need to paste paths together to get input file relative paths, since we are in the same directory. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-05-26gensquashfs: add option to simply pack an input directoryDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-05-25Update documentationDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-05-25gensquashfs: Make '-X help' work without specifying input/output filesDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-05-25Add options for lzma2 compressorDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-05-23Add options for deflate compressorDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-05-21Add options for lz4 compressorDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-05-21Add options for lzo compressorDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-05-21Add options for zstd compressorDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-05-21Add command line flag for compressor options, pass them to compressorsDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-05-21fix: inode number difference in dirent is actually signedDavid Oberhollenzer
For now, it is enough to reduce the comparison value, since the inode numbers are increasing. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-05-20Update READMEDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-05-20cleanup: remove squashfs type from fstree nodesDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-05-20cleanup: internalize frag_reader_t implementationDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-05-20cleanup: remove overly excessive commentsDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-05-20cleanup: internalize meta reader/writer implementationsDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-05-20Get rid of unalligned pointersDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-05-20Add string table headerDavid Oberhollenzer
Fix a line in the Automake file where the source file was added a second time instead of the header file. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-05-19rdsquashfs: fix read_inode_slink_ext returnDavid Oberhollenzer
Return the actual object, not 0. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-05-19Update manpageDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-05-19Add ZSTD compressor implementationDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-05-19Update REAMEDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-05-19Generate extended attribute tableDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-05-19Add xattr indices to inodesDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-05-19Add SELinux option to gensquashfsDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-05-19Add SELinux labeling to fstree codeDavid Oberhollenzer
Use libselinux to lookup the context attributes from a file. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-05-19Add extended attributes to fstreeDavid Oberhollenzer
We use a str_table_t to generate unique IDs for all unique keys and all unique values and then use a post processing step to deduplicate xattr listings. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-05-19Add string table implementationDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-05-19Fix directory index (yet again)David Oberhollenzer
Turns out (after countless hours of debugging since the squashfs kernel code is so convoluted) that the offset is relative to the first directory header for no apparant reason (the field holding the offset is way larger than neccessary to store absolute values). Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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