squashfs-tools-ng.git/lib/sqfs, branch v0.3

Add support for repacking condensed sparse files

2019-06-30T14:41:21+00:00

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

Add support for unpacking sparse files as sparse files

2019-06-28T13:07:34+00:00

Signed-off-by: David Oberhollenzer

Add support for packing sparse files

2019-06-28T13:07:34+00:00

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

Ommit fragment table if there really are no fragments

2019-06-28T13:07:29+00:00

Signed-off-by: David Oberhollenzer

Fix inode fragment & sparse counter initialization

2019-06-28T10:24:54+00:00

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

Cleanup: split fstree sort into 2 fstree independend functions

2019-06-22T18:04:25+00:00

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

Cleanup fstree code

2019-06-19T13:17:52+00:00

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

Move super block version check to sqfs_super_read

2019-06-15T13:28:11+00:00

Signed-off-by: David Oberhollenzer

Move file extraction code to generic data_reader_t in libsquashfs.a

2019-06-11T15:45:44+00:00

Signed-off-by: David Oberhollenzer

Move write_xattr to libsqfs.a

2019-06-11T10:48:51+00:00

Signed-off-by: David Oberhollenzer