90 lines
3.1 KiB
C
90 lines
3.1 KiB
C
|
|
#ifndef _MINIX_SAFECOPIES_H
|
|
#define _MINIX_SAFECOPIES_H 1
|
|
|
|
#include <minix/sys_config.h>
|
|
#include <sys/types.h>
|
|
#include <stdint.h>
|
|
|
|
typedef int32_t cp_grant_id_t;
|
|
|
|
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 -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. */
|
|
_PROTOTYPE( cp_grant_id_t cpf_grant_direct, (endpoint_t, vir_bytes, size_t, int));
|
|
_PROTOTYPE( cp_grant_id_t cpf_grant_indirect, (endpoint_t, endpoint_t, cp_grant_id_t));
|
|
_PROTOTYPE( cp_grant_id_t cpf_grant_magic, (endpoint_t, endpoint_t, vir_bytes, size_t, int));
|
|
_PROTOTYPE( int cpf_revoke, (cp_grant_id_t grant_id));
|
|
_PROTOTYPE( int cpf_lookup, (cp_grant_id_t g, endpoint_t *ep, endpoint_t *ep2));
|
|
|
|
_PROTOTYPE( int cpf_getgrants, (cp_grant_id_t *grant_ids, int n));
|
|
_PROTOTYPE( int cpf_setgrant_direct, (cp_grant_id_t g, endpoint_t who,
|
|
vir_bytes addr, size_t size, int access));
|
|
_PROTOTYPE( int cpf_setgrant_indirect, (cp_grant_id_t g, endpoint_t who_to,
|
|
endpoint_t who_from, cp_grant_id_t his_g));
|
|
_PROTOTYPE( 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));
|
|
_PROTOTYPE( int cpf_setgrant_disable, (cp_grant_id_t grant_id));
|
|
|
|
/* 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 */
|
|
|