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.
47 lines
978 B
C
47 lines
978 B
C
#ifndef _DS_STORE_H_
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#define _DS_STORE_H_
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/* Type definitions for the Data Store Server. */
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#include <sys/types.h>
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#include <minix/sys_config.h>
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#include <minix/ds.h>
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#include <minix/bitmap.h>
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#include <regex.h>
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#define NR_DS_KEYS 64 /* number of entries */
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#define NR_DS_SUBS (4*_NR_SYS_PROCS) /* number of subscriptions */
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#define NR_DS_SNAPSHOT 5 /* number of snapshots */
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/* Base 'class' for the following 3 structs. */
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struct data_store {
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int flags;
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char key[DS_MAX_KEYLEN]; /* key to lookup information */
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char owner[DS_MAX_KEYLEN];
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union {
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unsigned u32;
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char string[DS_MAX_STRLEN];
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struct {
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void *data;
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size_t length;
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size_t reallen;
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} mem;
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struct dsi_map {
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void *data;
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size_t length;
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void *realpointer;
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void *snapshots[NR_DS_SNAPSHOT];
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int sindex;
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} map;
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} u;
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};
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struct subscription {
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int flags;
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char owner[DS_MAX_KEYLEN];
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regex_t regex;
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bitchunk_t old_subs[BITMAP_CHUNKS(NR_DS_KEYS)];
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};
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#endif /* _DS_STORE_H_ */
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