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This commit adds support for packing sparse files into squashfs images
as follows:
- In the data writer: simply detect zero blocks and write a zero to the
block size field and don't emit any data. Record the number of bytes
saved this way. For fragments, set the fragment offset to invalid.
- In the inode writer: write out the number of bytes saved for sparse
files. If there should be a fragment but there is none, append a block
count of 0.
- In the data reader: if the block size is 0, read nothing from disk and
emit an empty block. Do the same if the fragment is missing.
- In the inode reader: restore the number of bytes saved for sparse files.
The sparse files can be packed and unpacked, but the unpacking will not
create sparse files for now.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Make sure the unit tests can be run from the distribution tar ball.
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 sparse attribute should be initialized with 0. It is subtracted
from the file size in the kernel to determine the file size on disk
to report to stat(2). So it actually didn't matter anyway (just for
correctness sake).
Second, the fragment index and offset should be set to 0xFFFFFFFF in
the rare case that no fragments exist.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Instead of having test cases per feature with multiple vendors, pack the
tests into test case per vendor with miltiple features.
This should make errors easier to find, since the code many vendor
extensions is closely related for all features.
E.g. breaking pax header parser is will now trigger the pax test case and
the others still work, vs all tests breaking because each feature test also
tries to read the pax version.
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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The following samples are removed:
- support for long user/group names (we ignore them anyway)
- support for sun tar oddities (incompatible & no intention to support it)
- support for star oddities (incompatible & no intention to support it)
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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Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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This IMO makes it somewhat easier to read and understand what's going on.
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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Use a simple strtol for block size and device block size:
- We don't need to check the block size, sqfs_super_init does that.
- We only need to make sure the device block size is at least 1k.
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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Instead of decomposing a default string in gensquashfs option processing,
move that to fstree_init instead and pass the option string directly to
fstree_init.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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This commit removes handling of compressor names from gensquashfs. Instead,
functions are added to libcompress to obtain name from ID, ID from name
and to print out defaults.
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 removes the packdir/packfile based directory setup magic
from fstree_from_file and moves it to gensquashfs. Over there, the
common parts are deduplicated.
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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Make tree node list sort and recursive variant available and independend
of the fstree_t.
This is considered cleaner, since the fstree_t actually isn't needed for
any of this and we can just call the recusvie sort on the root instead,
and we can use the sort implementation directly for things like the
upcoming unit test.
Also this commit splits up the merge/sort implementation into a seperate
split and merge functions to make the code somewhat more readable.
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 moves the SELinux label code after the tree is sorted and
the inode table is generated. Sorting helps to make sure that the tree
will always be traversed in a defined, deterministic order and likewise
the creation of xattrs happens in a defined, deterministic order.
Second, we can now use the inode table instead of having to implement a
recursive tree traversal yet again.
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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When creating a directory that has previously been created implicitly,
actually update the permissions as the documentation says.
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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- Replace scan and memmove with simple automaton
- Convert forward to back slashes, lots of file systems treat them
equivalenty, this saves us a few more checks down the road
- Remove './' path components. We can saveley remove them in a string
processing step instead of throwing an error. Also they actually appear
often in tar balls, possibly not under user control.
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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Replace default_$FIELD with a struct stat. Merge the rest of
add_node/add_file into mknode and add by path+stat.
Expose the mknode function and replace all the duplicated node pointer
arithmetic magic with a call to mknode.
Plus a generic cleanup by utlizing new util functions.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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- use generic struct stat based tree node add function
- simplify some of the parsing code
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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- use struct stat instead of tree node
- compact some of the code
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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