Fallback to arc4rand() in the LinuxKPI when read_random() returns
zero. This can happen for virtual machines. MFC after: 1 week Sponsored by: Mellanox Technologies
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Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=301544
@ -1,5 +1,5 @@
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/*-
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* Copyright (c) 2015 Mellanox Technologies, Ltd. All rights reserved.
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* Copyright (c) 2015-2016 Mellanox Technologies, Ltd. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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@ -102,7 +102,8 @@ eth_broadcast_addr(u8 *pa)
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static inline void
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random_ether_addr(u8 * dst)
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{
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read_random(dst, 6);
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if (read_random(dst, 6) == 0)
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arc4rand(dst, 6, 0);
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dst[0] &= 0xfe;
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dst[0] |= 0x02;
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@ -2,7 +2,7 @@
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* Copyright (c) 2010 Isilon Systems, Inc.
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* Copyright (c) 2010 iX Systems, Inc.
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* Copyright (c) 2010 Panasas, Inc.
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* Copyright (c) 2013, 2014 Mellanox Technologies, Ltd.
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* Copyright (c) 2013-2016 Mellanox Technologies, Ltd.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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@ -32,11 +32,13 @@
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#define _LINUX_RANDOM_H_
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#include <sys/random.h>
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#include <sys/libkern.h>
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static inline void
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get_random_bytes(void *buf, int nbytes)
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{
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read_random(buf, nbytes);
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if (read_random(buf, nbytes) == 0)
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arc4rand(buf, nbytes, 0);
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}
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#endif /* _LINUX_RANDOM_H_ */
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