minix/include/minix/safecopies.h
Lionel Sambuc 456a46e6bf Removing useless minix/types.h header
Change-Id: If5f922279b87f075f301b64c7786caa18b434c2a
2012-12-07 13:58:06 +01:00

90 lines
3 KiB
C

#ifndef _MINIX_SAFECOPIES_H
#define _MINIX_SAFECOPIES_H 1
#include <minix/sys_config.h>
#include <sys/types.h>
#include <minix/vm.h>
#include <stdint.h>
typedef struct {
int cp_flags; /* CPF_* below */
union {
struct {
/* CPF_DIRECT */
endpoint_t cp_who_to; /* grantee */
vir_bytes cp_start; /* memory */
size_t cp_len; /* size in bytes */
char cp_reserved[8]; /* future use */
} cp_direct;
struct {
/* CPF_INDIRECT */
endpoint_t cp_who_to; /* grantee */
endpoint_t cp_who_from; /* previous granter */
cp_grant_id_t cp_grant; /* previous grant */
char cp_reserved[8];/* future use */
} cp_indirect;
struct {
/* CPF_MAGIC */
endpoint_t cp_who_from; /* granter */
endpoint_t cp_who_to; /* grantee */
vir_bytes cp_start; /* memory */
size_t cp_len; /* size in bytes */
char cp_reserved[8]; /* future use */
} cp_magic;
} cp_u;
char cp_reserved[8]; /* future use */
} cp_grant_t;
/* Vectored safecopy. */
struct vscp_vec {
/* Exactly one of the following must be SELF. */
endpoint_t v_from; /* source */
endpoint_t v_to; /* destination */
cp_grant_id_t v_gid; /* grant id of other process */
size_t v_offset; /* offset in other grant */
vir_bytes v_addr; /* address in copier's space */
size_t v_bytes; /* no. of bytes */
};
/* Invalid grant number. */
#define GRANT_INVALID ((cp_grant_id_t) -1)
#define GRANT_VALID(g) ((g) > GRANT_INVALID)
/* Operations: any combination is ok. */
#define CPF_READ 0x000001 /* Granted process may read. */
#define CPF_WRITE 0x000002 /* Granted process may write. */
/* Internal flags. */
#define CPF_USED 0x000100 /* Grant slot in use. */
#define CPF_DIRECT 0x000200 /* Grant from this process to another. */
#define CPF_INDIRECT 0x000400 /* Grant from grant to another. */
#define CPF_MAGIC 0x000800 /* Grant from any to any. */
#define CPF_VALID 0x001000 /* Grant slot contains valid grant. */
/* Prototypes for functions in libsys. */
cp_grant_id_t cpf_grant_direct(endpoint_t, vir_bytes, size_t, int);
cp_grant_id_t cpf_grant_indirect(endpoint_t, endpoint_t, cp_grant_id_t);
cp_grant_id_t cpf_grant_magic(endpoint_t, endpoint_t, vir_bytes, size_t,
int);
int cpf_revoke(cp_grant_id_t grant_id);
int cpf_lookup(cp_grant_id_t g, endpoint_t *ep, endpoint_t *ep2);
int cpf_getgrants(cp_grant_id_t *grant_ids, int n);
int cpf_setgrant_direct(cp_grant_id_t g, endpoint_t who, vir_bytes addr,
size_t size, int access);
int cpf_setgrant_indirect(cp_grant_id_t g, endpoint_t who_to, endpoint_t
who_from, cp_grant_id_t his_g);
int cpf_setgrant_magic(cp_grant_id_t g, endpoint_t who_to, endpoint_t
who_from, vir_bytes addr, size_t bytes, int access);
int cpf_setgrant_disable(cp_grant_id_t grant_id);
void cpf_reload(void);
/* Set a process' grant table location and size (in-kernel only). */
#define _K_SET_GRANT_TABLE(rp, ptr, entries) \
priv(rp)->s_grant_table= (ptr); \
priv(rp)->s_grant_entries= (entries);
#endif /* _MINIX_SAFECOPIES_H */