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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2014-08-06 19:16:24 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-08-06 19:16:24 +0400 |
| commit | f4f142ed4ef835709c7e6d12eaca10d190bcebed (patch) | |
| tree | a0bc6850239fe3551bb67f5707bfef153ac437fe /include/uapi | |
| parent | bb2cbf5e9367d8598fecd0c48dead69560750223 (diff) | |
| parent | e02b876597777ab26288dd2611a97b597d14d661 (diff) | |
| download | linux-f4f142ed4ef835709c7e6d12eaca10d190bcebed.tar.xz | |
Merge tag 'random_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/random
Pull randomness updates from Ted Ts'o:
"Cleanups and bug fixes to /dev/random, add a new getrandom(2) system
call, which is a superset of OpenBSD's getentropy(2) call, for use
with userspace crypto libraries such as LibreSSL.
Also add the ability to have a kernel thread to pull entropy from
hardware rng devices into /dev/random"
* tag 'random_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/random:
hwrng: Pass entropy to add_hwgenerator_randomness() in bits, not bytes
random: limit the contribution of the hw rng to at most half
random: introduce getrandom(2) system call
hw_random: fix sparse warning (NULL vs 0 for pointer)
random: use registers from interrupted code for CPU's w/o a cycle counter
hwrng: add per-device entropy derating
hwrng: create filler thread
random: add_hwgenerator_randomness() for feeding entropy from devices
random: use an improved fast_mix() function
random: clean up interrupt entropy accounting for archs w/o cycle counters
random: only update the last_pulled time if we actually transferred entropy
random: remove unneeded hash of a portion of the entropy pool
random: always update the entropy pool under the spinlock
Diffstat (limited to 'include/uapi')
| -rw-r--r-- | include/uapi/asm-generic/unistd.h | 4 | ||||
| -rw-r--r-- | include/uapi/linux/random.h | 9 |
2 files changed, 12 insertions, 1 deletions
diff --git a/include/uapi/asm-generic/unistd.h b/include/uapi/asm-generic/unistd.h index 65acbf0e2867..f1afd607f043 100644 --- a/include/uapi/asm-generic/unistd.h +++ b/include/uapi/asm-generic/unistd.h @@ -701,9 +701,11 @@ __SYSCALL(__NR_sched_getattr, sys_sched_getattr) __SYSCALL(__NR_renameat2, sys_renameat2) #define __NR_seccomp 277 __SYSCALL(__NR_seccomp, sys_seccomp) +#define __NR_getrandom 278 +__SYSCALL(__NR_getrandom, sys_getrandom) #undef __NR_syscalls -#define __NR_syscalls 278 +#define __NR_syscalls 279 /* * All syscalls below here should go away really, diff --git a/include/uapi/linux/random.h b/include/uapi/linux/random.h index fff3528a078f..3f93d1695e7f 100644 --- a/include/uapi/linux/random.h +++ b/include/uapi/linux/random.h @@ -40,4 +40,13 @@ struct rand_pool_info { __u32 buf[0]; }; +/* + * Flags for getrandom(2) + * + * GRND_NONBLOCK Don't block and return EAGAIN instead + * GRND_RANDOM Use the /dev/random pool instead of /dev/urandom + */ +#define GRND_NONBLOCK 0x0001 +#define GRND_RANDOM 0x0002 + #endif /* _UAPI_LINUX_RANDOM_H */ |