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Progress on capabilities

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Capabilities will be shared among collection of threads. A pager
will have a right to share its own capabilities with its space,
its thread group and its container.

Currently sharing is possible with only all of the caps. Next,
it will be support for cap splitting, granting, and partial sharing
and granting.
This commit is contained in:
Bahadir Balban
2009-10-22 14:04:25 +03:00
parent c6bdd65e48
commit 0f9ea9674c
14 changed files with 298 additions and 47 deletions
Download Patch File Download Diff File Expand all files Collapse all files

41
src/generic/resource.c
View File

@@ -24,7 +24,7 @@ pmd_table_t *alloc_pmd(void)
{
struct capability *cap;
if (!(cap = capability_find_by_rtype(current->cap_list_ptr,
if (!(cap = capability_find_by_rtype(current,
CAP_RTYPE_MAPPOOL)))
return 0;
@@ -38,7 +38,7 @@ struct address_space *alloc_space(void)
{
struct capability *cap;
if (!(cap = capability_find_by_rtype(current->cap_list_ptr,
if (!(cap = capability_find_by_rtype(current,
CAP_RTYPE_SPACEPOOL)))
return 0;
@@ -60,7 +60,7 @@ struct ktcb *alloc_ktcb(void)
{
struct capability *cap;
if (!(cap = capability_find_by_rtype(current->cap_list_ptr,
if (!(cap = capability_find_by_rtype(current,
CAP_RTYPE_THREADPOOL)))
return 0;
@@ -73,7 +73,8 @@ struct ktcb *alloc_ktcb(void)
/*
* This version is boot-time only and it has no
* capability checking. Imagine the case where the
* initial capabilities are created.
* initial capabilities are created and there is no
* capability to check this allocation.
*/
struct capability *boot_alloc_capability(void)
{
@@ -84,7 +85,7 @@ struct capability *alloc_capability(void)
{
struct capability *cap;
if (!(cap = capability_find_by_rtype(current->cap_list_ptr,
if (!(cap = capability_find_by_rtype(current,
CAP_RTYPE_CAPPOOL)))
return 0;
@@ -103,7 +104,7 @@ struct mutex_queue *alloc_user_mutex(void)
{
struct capability *cap;
if (!(cap = capability_find_by_rtype(current->pager->tcb->cap_list_ptr,
if (!(cap = capability_find_by_rtype(current,
CAP_RTYPE_MUTEXPOOL)))
return 0;
@@ -122,7 +123,7 @@ void free_pmd(void *addr)
{
struct capability *cap;
BUG_ON(!(cap = capability_find_by_rtype(current->cap_list_ptr,
BUG_ON(!(cap = capability_find_by_rtype(current,
CAP_RTYPE_MAPPOOL)));
capability_free(cap, 1);
@@ -133,7 +134,7 @@ void free_space(void *addr)
{
struct capability *cap;
BUG_ON(!(cap = capability_find_by_rtype(current->cap_list_ptr,
BUG_ON(!(cap = capability_find_by_rtype(current,
CAP_RTYPE_SPACEPOOL)));
capability_free(cap, 1);
@@ -144,7 +145,7 @@ void free_ktcb(void *addr)
{
struct capability *cap;
BUG_ON(!(cap = capability_find_by_rtype(current->cap_list_ptr,
BUG_ON(!(cap = capability_find_by_rtype(current,
CAP_RTYPE_THREADPOOL)));
capability_free(cap, 1);
@@ -155,7 +156,7 @@ void free_capability(void *addr)
{
struct capability *cap;
BUG_ON(!(cap = capability_find_by_rtype(current->cap_list_ptr,
BUG_ON(!(cap = capability_find_by_rtype(current,
CAP_RTYPE_CAPPOOL)));
capability_free(cap, 1);
@@ -171,7 +172,7 @@ void free_user_mutex(void *addr)
{
struct capability *cap;
BUG_ON(!(cap = capability_find_by_rtype(current->pager->tcb->cap_list_ptr,
BUG_ON(!(cap = capability_find_by_rtype(current,
CAP_RTYPE_MUTEXPOOL)));
capability_free(cap, 1);
@@ -399,6 +400,7 @@ void init_kernel_resources(struct kernel_resources *kres)
memcap_unmap(&kres->physmem_free, kernel_area->start,
kernel_area->end);
/* Initialize zombie pager list */
init_ktcb_list(&kres->zombie_list);
/* TODO:
@@ -443,8 +445,8 @@ int copy_pager_info(struct pager *pager, struct pager_info *pinfo)
* Find pager's capability capability, check its
* current use count and initialize it
*/
cap = capability_find_by_rtype(&pager->cap_list,
CAP_RTYPE_CAPPOOL);
cap = cap_list_find_by_rtype(&pager->cap_list,
CAP_RTYPE_CAPPOOL);
/* Verify that we did not excess allocated */
if (!cap || cap->size < pinfo->ncaps) {
@@ -497,6 +499,14 @@ void setup_containers(struct boot_resources *bootres,
*/
current_pgd = realloc_page_tables();
/* Move it back
*
* FIXME: Merge until this part of code with
* kres_setup_capabilities and init_system_resources
* it doesn't look good.
*/
cap_list_move(&kres->non_memory_caps, &current->cap_list);
/* Create all containers but leave pagers */
for (int i = 0; i < bootres->nconts; i++) {
/* Allocate & init container */
@@ -575,7 +585,7 @@ void kres_setup_capabilities(struct boot_resources *bootres,
cap_list_insert(cap, &kres->non_memory_caps);
/* Set up dummy current cap-list for below functions to use */
current->cap_list_ptr = &kres->non_memory_caps;
cap_list_move(&current->cap_list, &kres->non_memory_caps);
copy_boot_capabilities(&kres->physmem_used);
copy_boot_capabilities(&kres->physmem_free);
@@ -836,8 +846,6 @@ int setup_boot_resources(struct boot_resources *bootres,
}
/*
* FIXME: Add error handling
*
* Initializes all system resources and handling of those
* resources. First descriptions are done by allocating from
* boot memory, once memory caches are initialized, boot
@@ -845,7 +853,6 @@ int setup_boot_resources(struct boot_resources *bootres,
*/
int init_system_resources(struct kernel_resources *kres)
{
/* FIXME: Count kernel resources */
struct boot_resources bootres;
memset(&bootres, 0, sizeof(bootres));