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path: root/scripts/lib/wic/filemap.py
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2018-11-06wic: use explicit errno importRoss Burton1
os.errno doesn't work in Python 3.7 and shouldn't have ever worked, so use import errno explicitly. Signed-off-by: Ross Burton <ross.burton@intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
2018-01-14wic: if we can't get from ioctl, try from os.stat()Dogukan Ergun1
Under some conditions, ioctl FIGETBSZ can't return real value. We can try to use fallback via os.stat() to get block size. Source of patch: https://github.com/intel/bmap-tools/commit/17365f4fe9089df7ee9800a2a0ced177ec4798a4 Signed-off-by: Dogukan Ergun <dogukan.ergun@gmail.com> Signed-off-by: Ross Burton <ross.burton@intel.com>
2017-06-23wic: code cleanupEd Bartosh1
Split long lines. Removed unused imports. Signed-off-by: Ed Bartosh <ed.bartosh@linux.intel.com> Signed-off-by: Ross Burton <ross.burton@intel.com>
2017-06-14filemap: calculate dst size correctlyEd Bartosh1
Fixed calculation of the dst file size using skip, seek and length parameters. Current code does it incorrectly which causes sparse_copy API to create unnecessary big output files. Signed-off-by: Ed Bartosh <ed.bartosh@linux.intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
2017-06-14filemap: check if dest is written for every blockEd Bartosh1
If lenght parameter is provided to sparse_copy call it's mandatory to check if the output file is fully written after reading unmapped block from input file. If it's not done then sparse_copy can write more data than specified length. Signed-off-by: Ed Bartosh <ed.bartosh@linux.intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
2017-06-14filemap: change signature of sparse_copy functionEd Bartosh1
Renamed parameter offset->skip to match names of dd parameters. Changed affected sparse_copy calls. Added explanation of the parameters to docstring. Signed-off-by: Ed Bartosh <ed.bartosh@linux.intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
2017-06-14filemap: add parameter 'length' to sparse_copyEd Bartosh1
Added parameter 'length' to specify amount of data to write into destination file. This is useful when only part of source file should be written into destination file. Signed-off-by: Ed Bartosh <ed.bartosh@linux.intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
2017-06-14filemap: fix skip logicEd Bartosh1
Fixed bug in processing 'skip' parameter: don't read input file if end of bmap block is less than skip Simplified logic of positioning to the start of data inside a partially skipped bmap block. Signed-off-by: Ed Bartosh <ed.bartosh@linux.intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
2017-04-11oe-selftest: test wic sparse_copy APIEd Bartosh1
Added new parameter 'api' to sparse_copy function to specify underlying filemap API to use. By default sparse_copy will try both available APIs. Added test case for sparse_copy to wic test suite. Signed-off-by: Ed Bartosh <ed.bartosh@linux.intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
2017-04-05Revert "filemap: remove FilemapSeek class"Ed Bartosh1
FIEMAP API is not supported by tmpfs file system, but SEEK_HOLE/SEEK_DATA is supported. Returned back FilemapSeek class that implements support of SEEK_HOLE/SEEK_DATA API to make sparse_copy API working on tmpfs again. This reverts commit 6b80c13f7a82a312a3b981de5a56c66466ba1fac. Signed-off-by: Ed Bartosh <ed.bartosh@linux.intel.com> Signed-off-by: Ross Burton <ross.burton@intel.com>
2017-03-31filemap: remove FilemapSeek classEd Bartosh1
FIEMAP API was added to Linux kernel 2.6.28 back in 2008 SEEK_HOLE and SEEK_DATA API was added much letter. As FIEMAP is used by filemap module as a default API it's safe to remove FileMpSeek class as it's never used. [YOCTO #10618] Signed-off-by: Ed Bartosh <ed.bartosh@linux.intel.com>
2017-03-22wic: fix bug in sparse_copyEd Bartosh1
sparse_copy creates output file that is smaller than input file when input file ends with unmapped blocks. Used truncate(<input file size>) when output file is created to ensure the size of output file will always be equal to the size of input file. Signed-off-by: Ed Bartosh <ed.bartosh@linux.intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
2017-03-10wic: filemap: Fixed spared_copy skipDaniel Schultz1
This patches removes the empty space in front of the copied file which was skipped. Without this reduction it's not possible to place a partition with rawcopy and skip parameter on a desired alignment. Signed-off-by: Daniel Schultz <d.schultz@phytec.de> Signed-off-by: Ross Burton <ross.burton@intel.com>
2016-05-14wic: use next builtin instead of .next methodEd Bartosh1
Generators in Python 3 don't have .next method. It's recommended to use 'next' builtin instead. As it also present in Python >= 2.6 it should make wic code compatible with both Python 2 and Python 3. [YOCTO #9412] Signed-off-by: Ed Bartosh <ed.bartosh@linux.intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
2016-05-14wic: use // operator instead of /Ed Bartosh1
Division operator works differently in Python 3. It results in float unlike in Python 2, where it results in int. Explicitly used "floor division" operator instead of 'division' operator. This should make the code to result in integer under both pythons. [YOCTO #9412] Signed-off-by: Ed Bartosh <ed.bartosh@linux.intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
2016-05-06wic: add sparse_copy APIEd Bartosh1
In order to make wic images sparse sparse_copy function has been copied from meta-ostro: https://github.com/kad/meta-ostro/blob/master/meta-ostro/lib/image-dsk.py This function uses filemap APIs to copy source sparse file into destination file preserving sparseness. The function has been modified to satisfy wic requirements: parameter 'skip' has been added. [YOCTO #9099] Signed-off-by: Ed Bartosh <ed.bartosh@linux.intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
2016-05-06wic: add FIEMAP and SEEK_HOLE / SEEK_DATA APIsEd Bartosh1
In order to make wic images sparse set of APIs has been copied from bmap-tools project. filemap.py module is taken from bmap-tools project: https://github.com/01org/bmap-tools/blob/master/bmaptools/Filemap.py It implements two ways of get information about file block: FIEMAP ioctl and the 'SEEK_HOLE / SEEK_DATA' features of the file seek syscall. Note that this module will be removed as soon as bmaptool utility supports copying sparse source file into destination file (this is already agreed with the maintainer of bmap-tools project). [YOCTO #9099] Signed-off-by: Ed Bartosh <ed.bartosh@linux.intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
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