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This should make it easier to use libsquashfs with custom setups that
embedd a squashfs image inside something else. Also, it should make
it easier to port to non unix-like platforms.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Add sqfs_* prefix to compressor, move implementation prefix up front.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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This change removes the need for passing a list of files around for
deduplication. Also the deduplication code no longer needs to worry
about order, since the file being deduplicated is only added after
deduplication is done.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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The strategy is simple:
- The data writer function that write data/fragment blocks get
access to the list files.
- When writing a fragment, we look for an already written file that has
a fragment with the same size and checksum.
- If we find one, we throw away the fragment and reuse the existing one.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Requires that config.h be included before other headers, since the macro
_FILE_OFFSET_BITS changes the definitions of things like 'struct stat'.
I chose to simply include it at the top of every C file and at
immediately after the double-inclusion guards of every header.
Signed-off-by: Matt Turner <mattst88@gmail.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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The added flags allow controlling the following on a per file level:
- forcing a file to be written uncompressed
- forcing a file to not have a fragment, i.e. the last truncated block
actually being written as a block
- padding a file to be alligned to device block size
The flags are not yet exposed to anything user controllable (such as
command line flags).
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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This commit broadly does the following things:
- Rename and move the sparse mapping structure to libutil
- Add a function to the data writer for writing condensed versions
of sparse files, given the mapping.
- This shares code with the already existing function for regular
files. The shared code is moved to a common helper function.
- Add support to tar2sqfs for repacking sparse files.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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