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2013-11-20Squashfs: Generalise paging handling in the decompressorsPhillip Lougher1-0/+1
Further generalise the decompressors by adding a page handler abstraction. This adds helpers to allow the decompressors to access and process the output buffers in an implementation independant manner. This allows different types of output buffer to be passed to the decompressors, with the implementation specific aspects handled at decompression time, but without the knowledge being held in the decompressor wrapper code. This will allow the decompressors to handle Squashfs cache buffers, and page cache pages. This patch adds the abstraction and an implementation for the caches. Signed-off-by: Phillip Lougher <phillip@squashfs.org.uk> Reviewed-by: Minchan Kim <minchan@kernel.org>
2013-11-20Squashfs: Refactor decompressor interface and codePhillip Lougher1-2/+1
The decompressor interface and code was written from the point of view of single-threaded operation. In doing so it mixed a lot of single-threaded implementation specific aspects into the decompressor code and elsewhere which makes it difficult to seamlessly support multiple different decompressor implementations. This patch does the following: 1. It removes compressor_options parsing from the decompressor init() function. This allows the decompressor init() function to be dynamically called to instantiate multiple decompressors, without the compressor options needing to be read and parsed each time. 2. It moves threading and all sleeping operations out of the decompressors. In doing so, it makes the decompressors non-blocking wrappers which only deal with interfacing with the decompressor implementation. 3. It splits decompressor.[ch] into decompressor generic functions in decompressor.[ch], and moves the single threaded decompressor implementation into decompressor_single.c. The result of this patch is Squashfs should now be able to support multiple decompressors by adding new decompressor_xxx.c files with specialised implementations of the functions in decompressor_single.c Signed-off-by: Phillip Lougher <phillip@squashfs.org.uk> Reviewed-by: Minchan Kim <minchan@kernel.org>
2011-12-30Squashfs: optimise squashfs_cache_get entry searchAjeet Yadav1-0/+1
squashfs_cache_get() iterates over all entries to search for block its looking for. Often get() / put() are called for same block. If we cache the current entry index, then we can optimise the subsequent *_get() calls. Signed-off-by: Ajeet Yadav <ajeet.yadav.77@gmail.com> Signed-off-by: Phillip Lougher <phillip@squashfs.org.uk>
2011-05-26Squashfs: update email addressPhillip Lougher1-1/+1
My existing email address may stop working in a month or two, so update email to one that will continue working. Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk>
2010-05-17squashfs: add xattr id supportPhillip Lougher1-0/+3
This patch adds support for mapping xattr ids (stored in inodes) into the on-disk location of the xattrs themselves. Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk>
2010-03-05Squashfs: get rid of obsolete variable in struct squashfs_sb_infoPhillip Lougher1-1/+0
Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk>
2010-01-20Squashfs: add a decompressor frameworkPhillip Lougher1-20/+21
This adds a decompressor framework which allows multiple compression algorithms to be cleanly supported. Also update zlib wrapper and other code to use the new framework. Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk>
2010-01-20Squashfs: factor out remaining zlib dependencies into separate wrapper filePhillip Lougher1-1/+1
Move zlib buffer init/destroy code into separate wrapper file. Also make zlib z_stream field a void * removing the need to include zlib.h for most files. Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk>
2009-01-05Squashfs: header filesPhillip Lougher1-0/+76
Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk>