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.
73 lines
2.8 KiB
C
73 lines
2.8 KiB
C
/* Prototypes and definitions for DS interface. */
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#ifndef _MINIX_DS_H
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#define _MINIX_DS_H
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#include <minix/types.h>
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/* Flags. */
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#define DSF_IN_USE 0x001 /* entry is in use */
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#define DSF_PRIV_RETRIEVE 0x002 /* only owner can retrieve */
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#define DSF_PRIV_OVERWRITE 0x004 /* only owner can overwrite */
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#define DSF_PRIV_SNAPSHOT 0x004 /* only owner can take a snapshot */
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#define DSF_PRIV_SUBSCRIBE 0x008 /* only owner can subscribe */
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#define DSF_TYPE_U32 0x010 /* u32 data type */
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#define DSF_TYPE_STR 0x020 /* string data type */
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#define DSF_TYPE_MEM 0x040 /* memory range data type */
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#define DSF_TYPE_MAP 0x080 /* mapped memory range data type */
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#define DSF_TYPE_LABEL 0x100 /* label data type */
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#define DSF_MASK_TYPE 0xFF0 /* mask for type flags. */
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#define DSF_MASK_INTERNAL 0xFFF /* mask for internal flags. */
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#define DSF_OVERWRITE 0x01000 /* overwrite if entry exists */
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#define DSF_INITIAL 0x02000 /* check subscriptions immediately */
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#define DSMF_MAP_MAPPED 0x10000 /* map mapped memory range */
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#define DSMF_COPY_MAPPED 0x20000 /* copy mapped memory range */
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#define DSMF_COPY_SNAPSHOT 0x40000 /* copy snapshot */
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/* DS constants. */
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#define DS_MAX_KEYLEN 80 /* Max length of a key, including '\0'. */
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#define DS_MAX_STRLEN 16 /* Max length of string, including '\0'. */
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/* ds.c */
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/* U32 */
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_PROTOTYPE( int ds_publish_u32, (const char *name, u32_t val, int flags));
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_PROTOTYPE( int ds_retrieve_u32, (const char *name, u32_t *val));
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_PROTOTYPE( int ds_delete_u32, (const char *ds_name));
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/* STRING */
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_PROTOTYPE( int ds_publish_str, (const char *name, char *val, int flags));
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_PROTOTYPE( int ds_retrieve_str, (const char *name, char *val, size_t len));
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_PROTOTYPE( int ds_delete_str, (const char *ds_name));
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/* MEM */
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_PROTOTYPE( int ds_publish_mem, (const char *ds_name, void *vaddr,
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size_t length, int flags));
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_PROTOTYPE( int ds_retrieve_mem, (const char *ds_name, char *vaddr,
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size_t *length));
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_PROTOTYPE( int ds_delete_mem, (const char *ds_name));
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/* MAP */
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_PROTOTYPE( int ds_publish_map, (const char *ds_name, void *vaddr,
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size_t length, int flags));
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_PROTOTYPE( int ds_snapshot_map, (const char *ds_name, int *nr_snapshot));
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_PROTOTYPE( int ds_retrieve_map, (const char *ds_name, char *vaddr,
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size_t *length, int nr_snapshot, int flags));
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_PROTOTYPE( int ds_delete_map, (const char *ds_name));
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/* LABEL */
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_PROTOTYPE( int ds_publish_label, (const char *ds_name, u32_t value,int flags));
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_PROTOTYPE( int ds_retrieve_label_name, (char *ds_name, u32_t num));
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_PROTOTYPE( int ds_retrieve_label_num, (const char *ds_name, u32_t *value));
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_PROTOTYPE( int ds_delete_label, (const char *ds_name));
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/* Subscribe and check. */
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_PROTOTYPE( int ds_subscribe, (const char *regex, int flags));
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_PROTOTYPE( int ds_check, (char *ds_name, int *type));
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#endif /* _MINIX_DS_H */
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