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Andres Lagar-Cavilla
447e175bad
This patch is the folded version of API updates, along with the associated tool changes to ensure that the build is always consistent. API updates: - The source domain in the sharing calls is no longer assumed to be dom0. - Previously, the mem sharing code would return an opaque handle to index shared pages (and nominees) in its global hash table. By removing the hash table, the handle becomes a version, to avoid sharing a stale version of a page. Thus, libxc wrappers and tools need to be updated to recall the share functions with the information needed to fetch the page (which they readily have). Tool updates: The only (in-tree, that we know of) consumer of the mem sharing API is the memshr tool. This is updated to use the new API. Signed-off-by: Andres Lagar-Cavilla <andres@lagarcavilla.org> Signed-off-by: Adin Scannell <adin@scannell.ca> Acked-by: Ian Campbell <ian.campbell@citrix.com> Committed-by: Tim Deegan <tim@xen.org>
53 lines
1.9 KiB
C
53 lines
1.9 KiB
C
/******************************************************************************
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*
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* Copyright (c) 2009 Citrix Systems, Inc. (Grzegorz Milos)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef __MEMSHR_H__
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#define __MEMSHR_H__
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#include <stdint.h>
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#include <xen/xen.h>
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#include <xen/grant_table.h>
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typedef uint64_t xen_mfn_t;
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typedef struct share_tuple
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{
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uint32_t domain;
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uint64_t frame;
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uint64_t handle;
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} share_tuple_t;
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extern void memshr_set_domid(int domid);
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extern void memshr_daemon_initialize(void);
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extern void memshr_vbd_initialize(void);
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extern uint16_t memshr_vbd_image_get(const char* file);
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extern void memshr_vbd_image_put(uint16_t memshr_id);
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extern int memshr_vbd_issue_ro_request(char *buf,
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grant_ref_t gref,
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uint16_t file_id,
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uint64_t sec,
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int secs,
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share_tuple_t *hnd);
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extern void memshr_vbd_complete_ro_request(
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share_tuple_t hnd,
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uint16_t file_id,
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uint64_t sec,
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int secs);
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#endif /* __MEMSHR_H__ */
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