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Capability accounting for quantitative capabilities - First part done.

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Need to make sure accounting charges correct containers during init.
Therefore kernel resource spending must also be accounted for.
This commit is contained in:
Bahadir Balban
2009-08-22 12:09:51 +03:00
parent de087eb1f8
commit d3d072e47d
9 changed files with 240 additions and 37 deletions
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46
src/generic/capability.c
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@@ -5,6 +5,9 @@
*/
#include <l4/generic/resource.h>
#include <l4/generic/capability.h>
#include <l4/generic/cap-types.h>
#include <l4/api/errno.h>
#include <l4/lib/printk.h>
void capability_init(struct capability *cap)
{
@@ -12,6 +15,19 @@ void capability_init(struct capability *cap)
link_init(&cap->list);
}
/*
* Boot-time function to create capability without
* capability checking
*/
struct capability *boot_capability_create(void)
{
struct capability *cap = boot_alloc_capability();
capability_init(cap);
return cap;
}
struct capability *capability_create(void)
{
struct capability *cap = alloc_capability();
@@ -21,3 +37,33 @@ struct capability *capability_create(void)
return cap;
}
int capability_consume(struct capability *cap, int quantity)
{
if (cap->size < cap->used + quantity)
return -ENOCAP;
else
cap->used += quantity;
return 0;
}
int capability_free(struct capability *cap, int quantity)
{
BUG_ON((cap->used -= quantity) < 0);
return 0;
}
/*
* Find a capability from a list by its resource type
*/
struct capability *capability_find_by_rtype(struct cap_list *clist,
unsigned int rtype)
{
struct capability *cap;
list_foreach_struct(cap, &clist->caps, list) {
if ((cap->type & CAP_RTYPE_MASK) == rtype)
return cap;
}
return 0;
}