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Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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A cleaner separation between common code, frontend code and backend
code is made.
The "is this byte blob zero" function is moved out to libutil (with
test case and everything) with a more optimized implementation.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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The thread pool enforces ordering of items during dequeue similar
to the already existing implementation in libsqfs. The idea is to
eventually pull this functionality out of the block processor and
turn it into a cleaner, separately tested module.
The thread pool is implemented as an abstract interface, so we can
have multiple implementations around, including the serial fallback
implementation which we can then *always* test, irregardless of the
compile config and run through static analysis as well.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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This has basically been copied over from Musl and slightly modifed.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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This commit restructures the rbtree code to optionally use a pool
allocator for the nodes. The option is made depenend on the presence
of a pre-processor flag.
To the configure script is added an option to enable/disable the use
of custom allocators. It makes sense to still allow the malloc/free
based routes for better ASAN based instrumentation.
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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The intention is to get rid of all the ad-hoc array implementations
in the other components and cut down code size.
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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If we use the rb-tree in libsquashfs objects, we need to be able
top copy an entire tree as part of the object.
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 base path is passed to the fstree_from_file function and in turn
to the individual callbacks.
The line parsing function is modified to allow '*' as mode, uid and gid
for specifically marked callbacks.
A glob callback is added that internally uses the fstree_from_dir scanning
functions in combination with a filter callback.
Directory scanning flags are parsed from the extra arguments before
interpreting it as a path fragment.
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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So we can scan a sub-directory within a the base directory without
having to do string operations first.
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 function creates a block processor from a structure describing it.
A stub implementation for the old sqfs_block_processor_create is added
that simply sets up such a struct and forwards the call.
The current version of the description struct only contains the exact
same parameters and a size field at the beginning.
This approach is supposed to make extending the range of parameters
easier without breaking ABI compatibillity.
Currently already planned are:
- Adding a sqfs_file_t pointer to double-check when deduplicating
fragments.
- When the scanning code reaches a usable state, add the abillity
to pass scanned fragment data, so the block processor can be used
for appending to an existing image.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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- Instead of using the fstree root, let the caller specify it.
- Add a flag to prevent recursion into sub directories.
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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Instead of comparing (compresed, disk-size, checksum) tuples to find
block matches, do an exact, byte-for-byte comparison of the data
stored on disk to avoid the possibility of a spurious colision.
Since this is the desired behaviour, make it the default, optionally
overrideable through a flag.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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The sqsf_writer is moved to a separate header, as well as the compressor
related stuff. The statistics function is moved into the writer code, as
this is the only place that actually uses it. The writer code itself is
split up into a hand full of file in their own subdirectory.
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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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 commit rewrites the libtar write paths to use libfstream insead of
a FILE pointer. Also, the libcommon file extraction function is remodeled
to use libfstream.
In accordance, rdsquashfs, sqfs2tar and sqfsdiff have some minor
adjustments made to work with the ported libtar and libcommon.
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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It does not make any changes to the writer itself, so mark it as
const. This also requires some similar changes to the string table.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Fragment deduplication really doesn't belong into the public API of
the fragment table.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Every compressor (except LC4) has a compression level parameter. This
commit pulls the compression level field out into the generic
configuration structure and applies some code clean ups as a result
from this.
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 LZMA compressor (through the xz-utils library) supports basically
the same options for micro management as the XZ compressor.
This commit enables support for those options in the compressor, the
option parser and adds an option field to the configuration structure.
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 commit adds propper defines in the super block header and removes
some of the hard coded constants.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Previously, the XZ compressor was called LZMA at some points in the
code, because it actually referres to LZMAv2 and the older LZMAv1
wasn't implemented. Since LZMAv1 is supported for some time now,
simply calling it LZMA is confusing.
This commit tries to replace the last bits where XZ is referred to
as LZMA, which turns out to be only a hand full of comments.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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- Move the xattr extraction and repacking to xattr.c
- Don't on-the-fly delete the tar xattr list, use the function
from libtar.a
- Split minor tasks into static helper functions
- creating a libtar xattr struct from libsqfs xattr data
- finding a hard link entry from current path and inode number
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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This function allows submission of raw blocks to the block processor,
completely bypassing the file API.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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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>
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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>
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Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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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>
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- 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>
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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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