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13f75d9ecf
RNDGETPOOL was thankfully removed twenty years ago, but it's stuck around in headers. Probably removing it from uapi headers isn't great in case there are some weird users out there, but we should at least mark this as having been removed, to save future readers the same goose chase I just went on. Link: https://lore.kernel.org/all/E1By1St-0001TS-Qj@thunk.org/ Link: https://lore.kernel.org/all/Pine.LNX.4.58.0409130937050.4094@ppc970.osdl.org/ Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
73 lines
1.9 KiB
C
73 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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/*
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* include/linux/random.h
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*
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* Include file for the random number generator.
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*/
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#ifndef _UAPI_LINUX_RANDOM_H
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#define _UAPI_LINUX_RANDOM_H
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#include <linux/types.h>
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#include <linux/ioctl.h>
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#include <linux/irqnr.h>
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/* ioctl()'s for the random number generator */
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/* Get the entropy count. */
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#define RNDGETENTCNT _IOR( 'R', 0x00, int )
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/* Add to (or subtract from) the entropy count. (Superuser only.) */
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#define RNDADDTOENTCNT _IOW( 'R', 0x01, int )
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/* Get the contents of the entropy pool. (Superuser only.) (Removed in 2.6.9-rc2.) */
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#define RNDGETPOOL _IOR( 'R', 0x02, int [2] )
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/*
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* Write bytes into the entropy pool and add to the entropy count.
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* (Superuser only.)
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*/
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#define RNDADDENTROPY _IOW( 'R', 0x03, int [2] )
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/* Clear entropy count to 0. (Superuser only.) */
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#define RNDZAPENTCNT _IO( 'R', 0x04 )
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/* Clear the entropy pool and associated counters. (Superuser only.) */
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#define RNDCLEARPOOL _IO( 'R', 0x06 )
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/* Reseed CRNG. (Superuser only.) */
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#define RNDRESEEDCRNG _IO( 'R', 0x07 )
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struct rand_pool_info {
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int entropy_count;
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int buf_size;
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__u32 buf[];
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};
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/*
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* Flags for getrandom(2)
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*
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* GRND_NONBLOCK Don't block and return EAGAIN instead
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* GRND_RANDOM No effect
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* GRND_INSECURE Return non-cryptographic random bytes
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*/
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#define GRND_NONBLOCK 0x0001
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#define GRND_RANDOM 0x0002
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#define GRND_INSECURE 0x0004
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/**
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* struct vgetrandom_opaque_params - arguments for allocating memory for vgetrandom
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*
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* @size_per_opaque_state: Size of each state that is to be passed to vgetrandom().
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* @mmap_prot: Value of the prot argument in mmap(2).
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* @mmap_flags: Value of the flags argument in mmap(2).
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* @reserved: Reserved for future use.
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*/
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struct vgetrandom_opaque_params {
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__u32 size_of_opaque_state;
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__u32 mmap_prot;
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__u32 mmap_flags;
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__u32 reserved[13];
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};
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#endif /* _UAPI_LINUX_RANDOM_H */
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