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Provide the infrastructure for sysadmins to select the broad class

Browse Source 
of entropy harvesting they wish to perform: "ethernet" (LAN),
point-to-point and interrupt.
This commit is contained in:
Mark Murray 2001-02-18 17:40:47 +00:00
parent 442aa310e6
commit 14636c3b51
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=72667
3 changed files with 27 additions and 1 deletions
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3
sys/dev/random/harvest.c
View File

@ -45,6 +45,9 @@
static u_int read_random_phony(void *, u_int);
/* Structure holding the desired entropy sources */
struct harvest_select harvest = { 0, 0, 0 };
/* hold the address of the routine which is actually called if
* the randomdev is loaded
*/

14
sys/dev/random/randomdev.c
View File

@ -81,7 +81,7 @@ static dev_t random_dev;
static dev_t urandom_dev; /* XXX Temporary */
/* To stash the sysctl's until they are removed */
static struct sysctl_oid *random_sysctl[10]; /* magic # is sysctl count */
static struct sysctl_oid *random_sysctl[12]; /* magic # is sysctl count */
static int sysctlcount = 0;
static int
@ -190,6 +190,18 @@ random_modevent(module_t mod, int type, void *data)
SYSCTL_ADD_INT(NULL, SYSCTL_CHILDREN(node1),
OID_AUTO, "seeded", CTLFLAG_RW,
&random_state.seeded, 0, "Seeded State");
random_sysctl[sysctlcount++] =
SYSCTL_ADD_INT(NULL, SYSCTL_CHILDREN(node1),
OID_AUTO, "harvest_ethernet", CTLFLAG_RW,
&harvest.ethernet, 0, "Harvest NIC entropy");
random_sysctl[sysctlcount++] =
SYSCTL_ADD_INT(NULL, SYSCTL_CHILDREN(node1),
OID_AUTO, "harvest_point_to_point", CTLFLAG_RW,
&harvest.point_to_point, 0, "Harvest serial net entropy");
random_sysctl[sysctlcount++] =
SYSCTL_ADD_INT(NULL, SYSCTL_CHILDREN(node1),
OID_AUTO, "harvest_interrupt", CTLFLAG_RW,
&harvest.interrupt, 0, "Harvest IRQ entropy");
random_sysctl[sysctlcount++] = node2 =
SYSCTL_ADD_NODE(NULL, SYSCTL_CHILDREN(node_base),
OID_AUTO, "yarrow", CTLFLAG_RW, 0,

11
sys/sys/random.h
View File

@ -37,6 +37,17 @@ enum esource { RANDOM_WRITE, RANDOM_KEYBOARD, RANDOM_MOUSE, RANDOM_NET,
RANDOM_INTERRUPT, ENTROPYSOURCE };
void random_harvest(void *, u_int, u_int, u_int, enum esource);
/* Allow the sysadmin to select the broad category of
* entropy types to harvest
*/
struct harvest_select {
int ethernet;
int point_to_point;
int interrupt;
};
extern struct harvest_select harvest;
#endif
#endif /* _SYS_RANDOM_H_ */