Remove the Yarrow PRNG algorithm option in accordance with due noticegiven in random(4).This includes updating of the relevant man pages, and no-longer-usedharvesting parameters.Ensure that the
Remove the Yarrow PRNG algorithm option in accordance with due noticegiven in random(4).This includes updating of the relevant man pages, and no-longer-usedharvesting parameters.Ensure that the pseudo-unit-test still does something useful, now alsowith the "other" algorithm instead of Yarrow.PR: 230870Reviewed by: cemApproved by: so(delphij,gtetlow)Approved by: re(marius)Differential Revision: https://reviews.freebsd.org/D16898
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sys/dev: further adoption of SPDX licensing ID tags.Mainly focus on files that use BSD 2-Clause license, however the tool Iwas using misidentified many licenses so this was mostly a manual - error
sys/dev: further adoption of SPDX licensing ID tags.Mainly focus on files that use BSD 2-Clause license, however the tool Iwas using misidentified many licenses so this was mostly a manual - errorprone - task.The Software Package Data Exchange (SPDX) group provides a specificationto make it easier for automated tools to detect and summarize well knownopensource licenses. We are gradually adopting the specification, notingthat the tags are considered only advisory and do not, in any way,superceed or replace the license texts.
Huge cleanup of random(4) code.* GENERAL- Update copyright.- Make kernel options for RANDOM_YARROW and RANDOM_DUMMY. Set neither to ON, which means we want Fortuna- If there is no 'device rand
Huge cleanup of random(4) code.* GENERAL- Update copyright.- Make kernel options for RANDOM_YARROW and RANDOM_DUMMY. Set neither to ON, which means we want Fortuna- If there is no 'device random' in the kernel, there will be NO random(4) device in the kernel, and the KERN_ARND sysctl will return nothing. With RANDOM_DUMMY there will be a random(4) that always blocks.- Repair kern.arandom (KERN_ARND sysctl). The old version went through arc4random(9) and was a bit weird.- Adjust arc4random stirring a bit - the existing code looks a little suspect.- Fix the nasty pre- and post-read overloading by providing explictit functions to do these tasks.- Redo read_random(9) so as to duplicate random(4)'s read internals. This makes it a first-class citizen rather than a hack.- Move stuff out of locked regions when it does not need to be there.- Trim RANDOM_DEBUG printfs. Some are excess to requirement, some behind boot verbose.- Use SYSINIT to sequence the startup.- Fix init/deinit sysctl stuff.- Make relevant sysctls also tunables.- Add different harvesting "styles" to allow for different requirements (direct, queue, fast).- Add harvesting of FFS atime events. This needs to be checked for weighing down the FS code.- Add harvesting of slab allocator events. This needs to be checked for weighing down the allocator code.- Fix the random(9) manpage.- Loadable modules are not present for now. These will be re-engineered when the dust settles.- Use macros for locks.- Fix comments.* src/share/man/...- Update the man pages.* src/etc/...- The startup/shutdown work is done in D2924.* src/UPDATING- Add UPDATING announcement.* src/sys/dev/random/build.sh- Add copyright.- Add libz for unit tests.* src/sys/dev/random/dummy.c- Remove; no longer needed. Functionality incorporated into randomdev.*.* live_entropy_sources.c live_entropy_sources.h- Remove; content moved.- move content to randomdev.[ch] and optimise.* src/sys/dev/random/random_adaptors.c src/sys/dev/random/random_adaptors.h- Remove; plugability is no longer used. Compile-time algorithm selection is the way to go.* src/sys/dev/random/random_harvestq.c src/sys/dev/random/random_harvestq.h- Add early (re)boot-time randomness caching.* src/sys/dev/random/randomdev_soft.c src/sys/dev/random/randomdev_soft.h- Remove; no longer needed.* src/sys/dev/random/uint128.h- Provide a fake uint128_t; if a real one ever arrived, we can use that instead. All that is needed here is N=0, N++, N==0, and some localised trickery is used to manufacture a 128-bit 0ULLL.* src/sys/dev/random/unit_test.c src/sys/dev/random/unit_test.h- Improve unit tests; previously the testing human needed clairvoyance; now the test will do a basic check of compressibility. Clairvoyant talent is still a good idea.- This is still a long way off a proper unit test.* src/sys/dev/random/fortuna.c src/sys/dev/random/fortuna.h- Improve messy union to just uint128_t.- Remove unneeded 'static struct fortuna_start_cache'.- Tighten up up arithmetic.- Provide a method to allow eternal junk to be introduced; harden it against blatant by compress/hashing.- Assert that locks are held correctly.- Fix the nasty pre- and post-read overloading by providing explictit functions to do these tasks.- Turn into self-sufficient module (no longer requires randomdev_soft.[ch])* src/sys/dev/random/yarrow.c src/sys/dev/random/yarrow.h- Improve messy union to just uint128_t.- Remove unneeded 'staic struct start_cache'.- Tighten up up arithmetic.- Provide a method to allow eternal junk to be introduced; harden it against blatant by compress/hashing.- Assert that locks are held correctly.- Fix the nasty pre- and post-read overloading by providing explictit functions to do these tasks.- Turn into self-sufficient module (no longer requires randomdev_soft.[ch])- Fix some magic numbers elsewhere used as FAST and SLOW.Differential Revision: https://reviews.freebsd.org/D2025Reviewed by: vsevolod,delphij,rwatson,trasz,jmgApproved by: so (delphij)
CALLOUT_MPSAFE has lost its meaning since r141428, i.e., for more than tenyears for head. However, it is continuously misused as the mpsafe argumentfor callout_init(9). Deprecate the flag and cle
CALLOUT_MPSAFE has lost its meaning since r141428, i.e., for more than tenyears for head. However, it is continuously misused as the mpsafe argumentfor callout_init(9). Deprecate the flag and clean up callout_init() callsto make them more consistent.Differential Revision: https://reviews.freebsd.org/D2613Reviewed by: jhbMFC after: 2 weeks
Wait for the callout to finish before unloading the moduleMFC after: 3 days
Add very simple virtio_random(4) driver to harvest entropy from hostReviewed by: markm (random bits only)