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Lots of fixes, notion of pager hierarchy, fixed tgroup capability checking

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Notion of pager hierarchy introduced using the existing but unused
pagerid field.

Thread creation now has two more flags TC_AS_PAGER and TC_SHARE_PAGER.
The former sets creator as pager, the latter sets creator's pager as pager.

Thread group capability sharing now correctly carries shared capabilities
to the thread group leader's tgr_cap_list list, and this list is checked
during capability checking.
This commit is contained in:
Bahadir Balban
2009-10-23 02:36:12 +03:00
parent df776b568f
commit 89d49ef495
8 changed files with 44 additions and 15 deletions
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6
src/generic/capability.c
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@@ -81,6 +81,7 @@ struct capability *capability_find_by_rtype(struct ktcb *task,
unsigned int rtype)
{
struct capability *cap;
struct ktcb *tgleader;
/* Search task's own list */
list_foreach_struct(cap, &task->cap_list.caps, list)
@@ -92,8 +93,11 @@ struct capability *capability_find_by_rtype(struct ktcb *task,
if (cap_rtype(cap) == rtype)
return cap;
/* Find group leader */
BUG_ON(!(tgleader = tcb_find(task->tgid)));
/* Search thread group list */
list_foreach_struct(cap, &task->tgr_cap_list.caps, list)
list_foreach_struct(cap, &tgleader->tgr_cap_list.caps, list)
if (cap_rtype(cap) == rtype)
return cap;