[release/0.4] Backport fixes from v0.5.1 to 0.4 #222
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These packages had incorrect error handling for their generated syscall bindings. The functions they were calling returned errors directly, but the binding was written such that the generated code was calling GetLastError instead. Thankfully, this did not affect the detection of whether or not an error had occurred, it only caused the value returned in the case of an error to be not the right error code. Signed-off-by: Kevin Parsons <kevpar@microsoft.com> (cherry picked from commit 9f0ab2c) Signed-off-by: Kevin Parsons <kevpar@microsoft.com>
(cherry picked from commit 0b148d1) Signed-off-by: Kevin Parsons <kevpar@microsoft.com>
A recent OS change altered how sparse files are represented in backup streams. This caused backuptar to no longer work with certain files. The specific behavior that changed is as follows: - Empty sparse files (size = 0), previously did not have any data or sparse block streams in the backup stream. Now, they will have a data stream with size = 0, and no sparse block streams. - Sparse files with a single allocated range (e.g. a normal file that has the sparse attribute set) previously would not show as sparse in the backup stream. Now, they will show as sparse. The old backuptar behavior assumed that if the sparse flag was set on the data stream, then there would always be a set of sparse blocks following. These changes break this assumption, and so require special handling. It is unsupported to have a data stream, marked sparse, that contains file content AND a series of sparse block streams following. As far as I can tell this is not a valid case for backup streams. This change also cleans up some code and error messages, and expands on the test coverage for backuptar. For more information on backup stream format see: https://docs.microsoft.com/en-us/openspecs/windows_protocols/ms-bkup/f67950c8-d583-469a-83dd-c4ff4cedf533 Signed-off-by: Kevin Parsons <kevpar@microsoft.com> (cherry picked from commit 33a4801) Signed-off-by: Kevin Parsons <kevpar@microsoft.com>
Signed-off-by: Kyle Wojtaszek <kylewo@microsoft.com> (cherry picked from commit 4c72048) Signed-off-by: Kevin Parsons <kevpar@microsoft.com>
katiewasnothere
approved these changes
Oct 15, 2021
dcantah
approved these changes
Oct 15, 2021
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Backport of these PRs: