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Implemented a protocol between client and pager for requesting caps.

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In posix, test0 makes inter-space ipc for testing extended ipc. This
correctly fails when only the cap to ipc to pager is given to all tasks
in the container.

In order to overcome this problem, the tasks who fork for doing ipc to
each other make a request to the pager to get capabilities to do so.

Pager finds its own widened ipc capability over the container, replicates
it, validates and reduces it to desired boundaries (i.e. just ipc betw.
two spaces) and grants it as IMMUTABLE to requesting tasks.

This protocol may be useful in implementing a client/server capability
request relationship. Code builds but untested.
This commit is contained in:
Bahadir Balban
2009-11-08 14:15:33 +02:00
parent b136b79a2d
commit dc03c7b130
12 changed files with 616 additions and 451 deletions
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3
include/l4/api/capability.h
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@@ -19,9 +19,10 @@
#define CAP_SHARE_SINGLE 0x00000001
#define CAP_SHARE_ALL 0x00000002
#define CAP_GRANT_MASK 0x00000003
#define CAP_GRANT_MASK 0x0000000F
#define CAP_GRANT_SINGLE 0x00000001
#define CAP_GRANT_ALL 0x00000002
#define CAP_GRANT_IMMUTABLE 0x00000004
/* Task's primary capability list */
#define TASK_CAP_LIST(task) \