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Force ztest to always use /dev/urandom

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For ztest, which is solely for testing, using a pseudo random
is entirely reasonable.  Using /dev/urandom ensures the system
entropy pool doesn't get depleted thus stalling the testing.
This is a particular problem when testing in VMs.

Reviewed-by: Tim Chase <tim@chase2k.com>
Reviewed by: Thomas Caputi <tcaputi@datto.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #7017 
Closes #7036
This commit is contained in:
Brian Behlendorf
2018-01-12 09:36:26 -08:00
committed by GitHub
parent 6df9f8ebd7
commit e1a0850c35
5 changed files with 12 additions and 16 deletions
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lib/libzpool/kernel.c
+4 -2
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@@ -907,13 +907,15 @@ lowbit64(uint64_t i)
return (__builtin_ffsll(i));
}
char *random_path = "/dev/random";
char *urandom_path = "/dev/urandom";
static int random_fd = -1, urandom_fd = -1;
void
random_init(void)
{
VERIFY((random_fd = open("/dev/random", O_RDONLY)) != -1);
VERIFY((urandom_fd = open("/dev/urandom", O_RDONLY)) != -1);
VERIFY((random_fd = open(random_path, O_RDONLY)) != -1);
VERIFY((urandom_fd = open(urandom_path, O_RDONLY)) != -1);
}
void