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. expanded grant manipulation interface to more direct

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manipulation
. made fs allocate a grant for every ioctl, even if no data
  is being copied, in order to disambiguate concurrent ioctls
  on the same minor
This commit is contained in:
Ben Gras
2006-06-26 16:08:42 +00:00
parent 2f50f92eb3
commit a587273c56
3 changed files with 132 additions and 49 deletions
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8
include/minix/safecopies.h
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@@ -71,6 +71,14 @@ _PROTOTYPE( int cpf_revoke, (cp_grant_id_t grant_id));
_PROTOTYPE( int cpf_preallocate, (cp_grant_t *, int));
_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));
/* 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); \