squashfs-tools-ng.git/include/sqfs, branch v1.1.3

Fix libsquashfs directory writer size accounting

2021-07-21T07:56:31+00:00

The squashfs readdir() implementation in the Linux kernel returns non-existing "." and ".." entries for offsets 0 and 1, and after that reads from disk. For convenience, it was decided to store an off-by-3 value on disk instead of doing complex primary school math to adjust for this. This didn't show up until now, because the kernel implementation trusts the value from the directory header more than the actual size in the inode and happily reads 3 more than the inode would allow it to. This only showed up with 7-zip which subtracts 3 from the size and expects the result to be exact and bails if the directory headers suggest otherwise. And yes, I did consider making a "Holy Hand Granade of Antioch" reference, but consciously decided not to. Signed-off-by: David Oberhollenzer

Remove casual un-const casting in various places

2021-06-25T13:12:41+00:00

Signed-off-by: David Oberhollenzer

Fix: libsquashfs: allow static linking on Windows

2021-04-09T09:55:04+00:00

If SQFS_STATIC is defined, dummy out the SQFS_API definition, so we don't try to pull stuff from a (in this case) non-existant DLL or try to export functions. Signed-off-by: David Oberhollenzer

Fix: libsquashfs: add sqfs_free() function

2021-04-08T10:04:33+00:00

On systems like Windows, the dynamic library and applications can easily end up being linked against different runtime libraries, so applications cannot be expected to be able to free() any malloc'd pointer that the library returns. This commit adds an sqfs_free function so the application can pass pointers back to the library to call the correct free() implementation. Signed-off-by: David Oberhollenzer

libsqfs: Add a sqfs_block_processor_create_ex function

2021-01-19T03:03:37+00:00

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

libsqfs: implement exact matching in the default block writer.

2020-12-05T23:42:32+00:00

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

Add flags to functions that might logically be expanded in the future

2020-06-11T13:36:08+00:00

Signed-off-by: David Oberhollenzer

Cleanup: mark sqfs_xattr_writer_flush writer argument as const

2020-06-09T04:51:31+00:00

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

Move the fragment deduplication hash table back into the block processor

2020-06-07T00:44:10+00:00

Fragment deduplication really doesn't belong into the public API of the fragment table. Signed-off-by: David Oberhollenzer

Cleanup: Pull compression level parameter out into compressor config

2020-06-04T05:24:52+00:00

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