c5b309ff07
Main changes: - COW optimization for safecopy. - safemap, a grant-based interface for sharing memory regions between processes. - Integration with safemap and complete rework of DS, supporting new data types natively (labels, memory ranges, memory mapped ranges). - For further information: http://wiki.minix3.org/en/SummerOfCode2009/MemoryGrants Additional changes not included in the original Wu's branch: - Fixed unhandled case in VM when using COW optimization for safecopy in case of a block that has already been shared as SMAP. - Better interface and naming scheme for sys_saferevmap and ds_retrieve_map calls. - Better input checking in syslib: check for page alignment when creating memory mapping grants. - DS notifies subscribers when an entry is deleted. - Documented the behavior of indirect grants in case of memory mapping. - Test suite in /usr/src/test/safeperf|safecopy|safemap|ds/* reworked and extended. - Minor fixes and general cleanup. - TO-DO: Grant ids should be generated and managed the way endpoints are to make sure grant slots are never misreused.
56 lines
1.1 KiB
C
56 lines
1.1 KiB
C
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#define _SYSTEM 1
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#include <minix/callnr.h>
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#include <minix/com.h>
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#include <minix/config.h>
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#include <minix/const.h>
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#include <minix/ds.h>
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#include <minix/endpoint.h>
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#include <minix/keymap.h>
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#include <minix/minlib.h>
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#include <minix/type.h>
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#include <minix/ipc.h>
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#include <minix/sysutil.h>
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#include <minix/syslib.h>
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#include <minix/safecopies.h>
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#include <minix/bitmap.h>
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#include <errno.h>
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#include <string.h>
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#include <env.h>
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#include <stdio.h>
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#include "glo.h"
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#include "proto.h"
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#include "util.h"
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/*===========================================================================*
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* do_rs_set_priv *
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*===========================================================================*/
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PUBLIC int do_rs_set_priv(message *m)
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{
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int r, n, nr;
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struct vmproc *vmp;
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nr = m->VM_RS_NR;
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if ((r = vm_isokendpt(nr, &n)) != OK) {
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printf("do_rs_set_priv: message from strange source %d\n", nr);
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return EINVAL;
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}
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vmp = &vmproc[n];
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if (m->VM_RS_BUF) {
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r = sys_datacopy(m->m_source, (vir_bytes) m->VM_RS_BUF,
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SELF, (vir_bytes) vmp->vm_call_mask,
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sizeof(vmp->vm_call_mask));
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if (r != OK)
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return r;
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}
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return OK;
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}
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