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