2006-06-20 10:45:04 +02:00
|
|
|
|
|
|
|
|
/* Library functions to maintain internal data copying tables.
|
|
|
|
|
*
|
|
|
|
|
* April 21 2006: Initial version (Ben Gras)
|
|
|
|
|
*
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
#include <lib.h>
|
|
|
|
|
#include <errno.h>
|
|
|
|
|
#include <minix/sysutil.h>
|
|
|
|
|
#include <assert.h>
|
|
|
|
|
#include <stdlib.h>
|
|
|
|
|
#include <minix/syslib.h>
|
|
|
|
|
#include <minix/safecopies.h>
|
2006-06-23 17:07:41 +02:00
|
|
|
#include <minix/com.h>
|
|
|
|
|
#include <string.h>
|
2006-06-20 10:45:04 +02:00
|
|
|
|
2006-06-26 18:08:42 +02:00
|
|
|
#define ACCESS_CHECK(a) { \
|
2010-01-14 16:24:16 +01:00
|
|
|
if((a) & ~(CPF_READ|CPF_WRITE|CPF_MAP)) { \
|
2006-06-26 18:08:42 +02:00
|
|
|
errno = EINVAL; \
|
|
|
|
|
return -1; \
|
|
|
|
|
} \
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
#define GID_CHECK(gid) { \
|
|
|
|
|
if(!GRANT_VALID(gid) || (gid) < 0 || (gid) >= ngrants) {\
|
|
|
|
|
errno = EINVAL; \
|
|
|
|
|
return -1; \
|
|
|
|
|
} \
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
#define GID_CHECK_USED(gid) { \
|
|
|
|
|
GID_CHECK(gid); \
|
|
|
|
|
if(!(grants[gid].cp_flags & CPF_USED)) { \
|
|
|
|
|
errno = EINVAL; \
|
|
|
|
|
return -1; \
|
|
|
|
|
} \
|
|
|
|
|
}
|
|
|
|
|
|
2010-01-14 16:24:16 +01:00
|
|
|
#define CLICK_ALIGNMENT_CHECK(addr, bytes) { \
|
|
|
|
|
if(((vir_bytes)(addr) % CLICK_SIZE != 0) \
|
|
|
|
|
|| ((vir_bytes)(bytes) % CLICK_SIZE != 0)) { \
|
|
|
|
|
return EINVAL; \
|
|
|
|
|
} \
|
|
|
|
|
}
|
|
|
|
|
|
Initialization protocol for system services.
SYSLIB CHANGES:
- SEF framework now supports a new SEF Init request type from RS. 3 different
callbacks are available (init_fresh, init_lu, init_restart) to specify
initialization code when a service starts fresh, starts after a live update,
or restarts.
SYSTEM SERVICE CHANGES:
- Initialization code for system services is now enclosed in a callback SEF will
automatically call at init time. The return code of the callback will
tell RS whether the initialization completed successfully.
- Each init callback can access information passed by RS to initialize. As of
now, each system service has access to the public entries of RS's system process
table to gather all the information required to initialize. This design
eliminates many existing or potential races at boot time and provides a uniform
initialization interface to system services. The same interface will be reused
for the upcoming publish/subscribe model to handle dynamic
registration / deregistration of system services.
VM CHANGES:
- Uniform privilege management for all system services. Every service uses the
same call mask format. For boot services, VM copies the call mask from init
data. For dynamic services, VM still receives the call mask via rs_set_priv
call that will be soon replaced by the upcoming publish/subscribe model.
RS CHANGES:
- The system process table has been reorganized and split into private entries
and public entries. Only the latter ones are exposed to system services.
- VM call masks are now entirely configured in rs/table.c
- RS has now its own slot in the system process table. Only kernel tasks and
user processes not included in the boot image are now left out from the system
process table.
- RS implements the initialization protocol for system services.
- For services in the boot image, RS blocks till initialization is complete and
panics when failure is reported back. Services are initialized in their order of
appearance in the boot image priv table and RS blocks to implements synchronous
initialization for every system service having the flag SF_SYNCH_BOOT set.
- For services started dynamically, the initialization protocol is implemented
as though it were the first ping for the service. In this case, if the
system service fails to report back (or reports failure), RS brings the service
down rather than trying to restart it.
2010-01-08 02:20:42 +01:00
|
|
|
#define NR_STATIC_GRANTS 2
|
2012-03-25 20:25:53 +02:00
|
|
|
static cp_grant_t static_grants[NR_STATIC_GRANTS];
|
|
|
|
|
static cp_grant_t *grants = NULL;
|
|
|
|
|
static int ngrants = 0;
|
2006-06-20 10:45:04 +02:00
|
|
|
|
2012-03-25 20:25:53 +02:00
|
|
|
static void
|
2006-06-20 10:45:04 +02:00
|
|
|
cpf_grow(void)
|
|
|
|
|
{
|
2006-06-30 16:40:29 +02:00
|
|
|
/* Grow the grants table if possible. */
|
2006-06-20 10:45:04 +02:00
|
|
|
cp_grant_t *new_grants;
|
|
|
|
|
cp_grant_id_t g;
|
|
|
|
|
int new_size;
|
|
|
|
|
|
Initialization protocol for system services.
SYSLIB CHANGES:
- SEF framework now supports a new SEF Init request type from RS. 3 different
callbacks are available (init_fresh, init_lu, init_restart) to specify
initialization code when a service starts fresh, starts after a live update,
or restarts.
SYSTEM SERVICE CHANGES:
- Initialization code for system services is now enclosed in a callback SEF will
automatically call at init time. The return code of the callback will
tell RS whether the initialization completed successfully.
- Each init callback can access information passed by RS to initialize. As of
now, each system service has access to the public entries of RS's system process
table to gather all the information required to initialize. This design
eliminates many existing or potential races at boot time and provides a uniform
initialization interface to system services. The same interface will be reused
for the upcoming publish/subscribe model to handle dynamic
registration / deregistration of system services.
VM CHANGES:
- Uniform privilege management for all system services. Every service uses the
same call mask format. For boot services, VM copies the call mask from init
data. For dynamic services, VM still receives the call mask via rs_set_priv
call that will be soon replaced by the upcoming publish/subscribe model.
RS CHANGES:
- The system process table has been reorganized and split into private entries
and public entries. Only the latter ones are exposed to system services.
- VM call masks are now entirely configured in rs/table.c
- RS has now its own slot in the system process table. Only kernel tasks and
user processes not included in the boot image are now left out from the system
process table.
- RS implements the initialization protocol for system services.
- For services in the boot image, RS blocks till initialization is complete and
panics when failure is reported back. Services are initialized in their order of
appearance in the boot image priv table and RS blocks to implements synchronous
initialization for every system service having the flag SF_SYNCH_BOOT set.
- For services started dynamically, the initialization protocol is implemented
as though it were the first ping for the service. In this case, if the
system service fails to report back (or reports failure), RS brings the service
down rather than trying to restart it.
2010-01-08 02:20:42 +01:00
|
|
|
if(!ngrants) {
|
|
|
|
|
/* Use statically allocated grants the first time. */
|
|
|
|
|
new_size = NR_STATIC_GRANTS;
|
|
|
|
|
new_grants = static_grants;
|
|
|
|
|
}
|
|
|
|
|
else {
|
|
|
|
|
new_size = (1+ngrants)*2;
|
|
|
|
|
assert(new_size > ngrants);
|
2006-06-20 10:45:04 +02:00
|
|
|
|
Initialization protocol for system services.
SYSLIB CHANGES:
- SEF framework now supports a new SEF Init request type from RS. 3 different
callbacks are available (init_fresh, init_lu, init_restart) to specify
initialization code when a service starts fresh, starts after a live update,
or restarts.
SYSTEM SERVICE CHANGES:
- Initialization code for system services is now enclosed in a callback SEF will
automatically call at init time. The return code of the callback will
tell RS whether the initialization completed successfully.
- Each init callback can access information passed by RS to initialize. As of
now, each system service has access to the public entries of RS's system process
table to gather all the information required to initialize. This design
eliminates many existing or potential races at boot time and provides a uniform
initialization interface to system services. The same interface will be reused
for the upcoming publish/subscribe model to handle dynamic
registration / deregistration of system services.
VM CHANGES:
- Uniform privilege management for all system services. Every service uses the
same call mask format. For boot services, VM copies the call mask from init
data. For dynamic services, VM still receives the call mask via rs_set_priv
call that will be soon replaced by the upcoming publish/subscribe model.
RS CHANGES:
- The system process table has been reorganized and split into private entries
and public entries. Only the latter ones are exposed to system services.
- VM call masks are now entirely configured in rs/table.c
- RS has now its own slot in the system process table. Only kernel tasks and
user processes not included in the boot image are now left out from the system
process table.
- RS implements the initialization protocol for system services.
- For services in the boot image, RS blocks till initialization is complete and
panics when failure is reported back. Services are initialized in their order of
appearance in the boot image priv table and RS blocks to implements synchronous
initialization for every system service having the flag SF_SYNCH_BOOT set.
- For services started dynamically, the initialization protocol is implemented
as though it were the first ping for the service. In this case, if the
system service fails to report back (or reports failure), RS brings the service
down rather than trying to restart it.
2010-01-08 02:20:42 +01:00
|
|
|
/* Allocate a block of new size. */
|
|
|
|
|
if(!(new_grants=malloc(new_size * sizeof(grants[0])))) {
|
|
|
|
|
return;
|
|
|
|
|
}
|
2008-11-19 13:26:10 +01:00
|
|
|
}
|
2006-06-20 10:45:04 +02:00
|
|
|
|
2006-06-23 14:07:41 +02:00
|
|
|
/* Copy old block to new block. */
|
|
|
|
|
if(grants && ngrants > 0)
|
|
|
|
|
memcpy(new_grants, grants, ngrants * sizeof(grants[0]));
|
|
|
|
|
|
2006-06-20 10:45:04 +02:00
|
|
|
/* Make sure new slots are marked unused (CPF_USED is clear). */
|
|
|
|
|
for(g = ngrants; g < new_size; g++)
|
2006-06-23 14:07:41 +02:00
|
|
|
new_grants[g].cp_flags = 0;
|
2006-06-20 10:45:04 +02:00
|
|
|
|
|
|
|
|
/* Inform kernel about new size (and possibly new location). */
|
2006-06-23 17:35:05 +02:00
|
|
|
if((sys_setgrant(new_grants, new_size))) {
|
Initialization protocol for system services.
SYSLIB CHANGES:
- SEF framework now supports a new SEF Init request type from RS. 3 different
callbacks are available (init_fresh, init_lu, init_restart) to specify
initialization code when a service starts fresh, starts after a live update,
or restarts.
SYSTEM SERVICE CHANGES:
- Initialization code for system services is now enclosed in a callback SEF will
automatically call at init time. The return code of the callback will
tell RS whether the initialization completed successfully.
- Each init callback can access information passed by RS to initialize. As of
now, each system service has access to the public entries of RS's system process
table to gather all the information required to initialize. This design
eliminates many existing or potential races at boot time and provides a uniform
initialization interface to system services. The same interface will be reused
for the upcoming publish/subscribe model to handle dynamic
registration / deregistration of system services.
VM CHANGES:
- Uniform privilege management for all system services. Every service uses the
same call mask format. For boot services, VM copies the call mask from init
data. For dynamic services, VM still receives the call mask via rs_set_priv
call that will be soon replaced by the upcoming publish/subscribe model.
RS CHANGES:
- The system process table has been reorganized and split into private entries
and public entries. Only the latter ones are exposed to system services.
- VM call masks are now entirely configured in rs/table.c
- RS has now its own slot in the system process table. Only kernel tasks and
user processes not included in the boot image are now left out from the system
process table.
- RS implements the initialization protocol for system services.
- For services in the boot image, RS blocks till initialization is complete and
panics when failure is reported back. Services are initialized in their order of
appearance in the boot image priv table and RS blocks to implements synchronous
initialization for every system service having the flag SF_SYNCH_BOOT set.
- For services started dynamically, the initialization protocol is implemented
as though it were the first ping for the service. In this case, if the
system service fails to report back (or reports failure), RS brings the service
down rather than trying to restart it.
2010-01-08 02:20:42 +01:00
|
|
|
if(new_grants != static_grants) free(new_grants);
|
2006-06-20 10:45:04 +02:00
|
|
|
return; /* Failed - don't grow then. */
|
2006-06-23 14:07:41 +02:00
|
|
|
}
|
2006-06-20 10:45:04 +02:00
|
|
|
|
|
|
|
|
/* Update internal data. */
|
Initialization protocol for system services.
SYSLIB CHANGES:
- SEF framework now supports a new SEF Init request type from RS. 3 different
callbacks are available (init_fresh, init_lu, init_restart) to specify
initialization code when a service starts fresh, starts after a live update,
or restarts.
SYSTEM SERVICE CHANGES:
- Initialization code for system services is now enclosed in a callback SEF will
automatically call at init time. The return code of the callback will
tell RS whether the initialization completed successfully.
- Each init callback can access information passed by RS to initialize. As of
now, each system service has access to the public entries of RS's system process
table to gather all the information required to initialize. This design
eliminates many existing or potential races at boot time and provides a uniform
initialization interface to system services. The same interface will be reused
for the upcoming publish/subscribe model to handle dynamic
registration / deregistration of system services.
VM CHANGES:
- Uniform privilege management for all system services. Every service uses the
same call mask format. For boot services, VM copies the call mask from init
data. For dynamic services, VM still receives the call mask via rs_set_priv
call that will be soon replaced by the upcoming publish/subscribe model.
RS CHANGES:
- The system process table has been reorganized and split into private entries
and public entries. Only the latter ones are exposed to system services.
- VM call masks are now entirely configured in rs/table.c
- RS has now its own slot in the system process table. Only kernel tasks and
user processes not included in the boot image are now left out from the system
process table.
- RS implements the initialization protocol for system services.
- For services in the boot image, RS blocks till initialization is complete and
panics when failure is reported back. Services are initialized in their order of
appearance in the boot image priv table and RS blocks to implements synchronous
initialization for every system service having the flag SF_SYNCH_BOOT set.
- For services started dynamically, the initialization protocol is implemented
as though it were the first ping for the service. In this case, if the
system service fails to report back (or reports failure), RS brings the service
down rather than trying to restart it.
2010-01-08 02:20:42 +01:00
|
|
|
if(grants && ngrants > 0 && grants != static_grants) free(grants);
|
2006-06-20 10:45:04 +02:00
|
|
|
grants = new_grants;
|
|
|
|
|
ngrants = new_size;
|
|
|
|
|
}
|
|
|
|
|
|
2012-03-25 20:25:53 +02:00
|
|
|
static cp_grant_id_t
|
2006-06-20 10:45:04 +02:00
|
|
|
cpf_new_grantslot(void)
|
|
|
|
|
{
|
|
|
|
|
/* Find a new, free grant slot in the grant table, grow it if
|
|
|
|
|
* necessary. If no free slot is found and the grow failed,
|
|
|
|
|
* return -1. Otherwise, return grant slot number.
|
|
|
|
|
*/
|
|
|
|
|
cp_grant_id_t g;
|
|
|
|
|
|
|
|
|
|
/* Find free slot. */
|
2006-06-27 16:15:47 +02:00
|
|
|
for(g = 0; g < ngrants && (grants[g].cp_flags & CPF_USED); g++)
|
|
|
|
|
;
|
2006-06-20 10:45:04 +02:00
|
|
|
|
|
|
|
|
assert(g <= ngrants);
|
|
|
|
|
|
|
|
|
|
/* No free slot found? */
|
2006-06-27 16:15:47 +02:00
|
|
|
if(g == ngrants) {
|
2006-06-20 10:45:04 +02:00
|
|
|
cpf_grow();
|
2006-06-27 16:15:47 +02:00
|
|
|
assert(g <= ngrants); /* ngrants can't shrink. */
|
|
|
|
|
if(g == ngrants) {
|
2006-06-20 10:45:04 +02:00
|
|
|
/* ngrants hasn't increased. */
|
|
|
|
|
errno = ENOSPC;
|
|
|
|
|
return -1;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Basic sanity checks - if we get this far, g must be a valid,
|
|
|
|
|
* free slot.
|
|
|
|
|
*/
|
|
|
|
|
assert(GRANT_VALID(g));
|
|
|
|
|
assert(g >= 0);
|
|
|
|
|
assert(g < ngrants);
|
|
|
|
|
assert(!(grants[g].cp_flags & CPF_USED));
|
|
|
|
|
|
|
|
|
|
return g;
|
|
|
|
|
}
|
|
|
|
|
|
2012-03-25 20:25:53 +02:00
|
|
|
cp_grant_id_t
|
2006-06-20 10:45:04 +02:00
|
|
|
cpf_grant_direct(endpoint_t who_to, vir_bytes addr, size_t bytes, int access)
|
|
|
|
|
{
|
|
|
|
|
cp_grant_id_t g;
|
2006-06-26 18:08:42 +02:00
|
|
|
int r;
|
2006-06-20 10:45:04 +02:00
|
|
|
|
|
|
|
|
/* Get new slot to put new grant in. */
|
|
|
|
|
if((g = cpf_new_grantslot()) < 0)
|
2010-06-01 14:35:33 +02:00
|
|
|
return(GRANT_INVALID);
|
2006-06-20 10:45:04 +02:00
|
|
|
|
|
|
|
|
assert(GRANT_VALID(g));
|
|
|
|
|
assert(g >= 0);
|
|
|
|
|
assert(g < ngrants);
|
|
|
|
|
assert(!(grants[g].cp_flags & CPF_USED));
|
|
|
|
|
|
2006-06-26 18:08:42 +02:00
|
|
|
if((r=cpf_setgrant_direct(g, who_to, addr, bytes, access)) < 0) {
|
|
|
|
|
cpf_revoke(g);
|
2010-06-01 14:35:33 +02:00
|
|
|
return(GRANT_INVALID);
|
2006-06-26 18:08:42 +02:00
|
|
|
}
|
2006-06-20 10:45:04 +02:00
|
|
|
|
|
|
|
|
return g;
|
|
|
|
|
}
|
|
|
|
|
|
2012-03-25 20:25:53 +02:00
|
|
|
cp_grant_id_t
|
2006-06-20 10:45:04 +02:00
|
|
|
cpf_grant_indirect(endpoint_t who_to, endpoint_t who_from, cp_grant_id_t gr)
|
|
|
|
|
{
|
|
|
|
|
/* Grant process A access into process B. B has granted us access as grant
|
|
|
|
|
* id 'gr'.
|
|
|
|
|
*/
|
|
|
|
|
cp_grant_id_t g;
|
2006-06-26 18:08:42 +02:00
|
|
|
int r;
|
2006-06-20 10:45:04 +02:00
|
|
|
|
|
|
|
|
/* Obtain new slot. */
|
|
|
|
|
if((g = cpf_new_grantslot()) < 0)
|
|
|
|
|
return -1;
|
|
|
|
|
|
|
|
|
|
/* Basic sanity checks. */
|
|
|
|
|
assert(GRANT_VALID(g));
|
|
|
|
|
assert(g >= 0);
|
|
|
|
|
assert(g < ngrants);
|
|
|
|
|
assert(!(grants[g].cp_flags & CPF_USED));
|
|
|
|
|
|
|
|
|
|
/* Fill in new slot data. */
|
2006-06-26 18:08:42 +02:00
|
|
|
if((r=cpf_setgrant_indirect(g, who_to, who_from, gr)) < 0) {
|
|
|
|
|
cpf_revoke(g);
|
|
|
|
|
return GRANT_INVALID;
|
|
|
|
|
}
|
2006-06-20 10:45:04 +02:00
|
|
|
|
|
|
|
|
return g;
|
|
|
|
|
}
|
|
|
|
|
|
2012-03-25 20:25:53 +02:00
|
|
|
cp_grant_id_t
|
2006-06-20 10:45:04 +02:00
|
|
|
cpf_grant_magic(endpoint_t who_to, endpoint_t who_from,
|
|
|
|
|
vir_bytes addr, size_t bytes, int access)
|
|
|
|
|
{
|
|
|
|
|
/* Grant process A access into process B. Not everyone can do this. */
|
|
|
|
|
cp_grant_id_t g;
|
2006-06-26 18:08:42 +02:00
|
|
|
int r;
|
|
|
|
|
|
|
|
|
|
ACCESS_CHECK(access);
|
2006-06-20 10:45:04 +02:00
|
|
|
|
|
|
|
|
/* Obtain new slot. */
|
|
|
|
|
if((g = cpf_new_grantslot()) < 0)
|
|
|
|
|
return -1;
|
|
|
|
|
|
|
|
|
|
/* Basic sanity checks. */
|
|
|
|
|
assert(GRANT_VALID(g));
|
|
|
|
|
assert(g >= 0);
|
|
|
|
|
assert(g < ngrants);
|
|
|
|
|
assert(!(grants[g].cp_flags & CPF_USED));
|
|
|
|
|
|
2006-06-26 18:08:42 +02:00
|
|
|
if((r=cpf_setgrant_magic(g, who_to, who_from, addr,
|
|
|
|
|
bytes, access)) < 0) {
|
|
|
|
|
cpf_revoke(g);
|
2006-06-20 10:45:04 +02:00
|
|
|
return -1;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return g;
|
|
|
|
|
}
|
|
|
|
|
|
2012-03-25 20:25:53 +02:00
|
|
|
int
|
2006-06-20 10:45:04 +02:00
|
|
|
cpf_revoke(cp_grant_id_t g)
|
|
|
|
|
{
|
|
|
|
|
/* Revoke previously granted access, identified by grant id. */
|
2010-01-14 16:24:16 +01:00
|
|
|
int r;
|
2006-06-26 18:08:42 +02:00
|
|
|
GID_CHECK_USED(g);
|
2006-06-20 10:45:04 +02:00
|
|
|
|
2010-01-14 16:24:16 +01:00
|
|
|
/* If this grant is for memory mapping, revoke the mapping first. */
|
|
|
|
|
if(grants[g].cp_flags & CPF_MAP) {
|
|
|
|
|
r = sys_saferevmap_gid(g);
|
|
|
|
|
if(r != 0)
|
|
|
|
|
return r;
|
|
|
|
|
}
|
|
|
|
|
|
2006-06-20 10:45:04 +02:00
|
|
|
/* Make grant invalid by setting flags to 0, clearing CPF_USED.
|
|
|
|
|
* This invalidates the grant.
|
|
|
|
|
*/
|
|
|
|
|
grants[g].cp_flags = 0;
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
2012-03-25 20:25:53 +02:00
|
|
|
int
|
2006-06-20 10:45:04 +02:00
|
|
|
cpf_lookup(cp_grant_id_t g, endpoint_t *granter, endpoint_t *grantee)
|
|
|
|
|
{
|
|
|
|
|
/* First check slot validity, and if it's in use currently. */
|
2006-06-26 18:08:42 +02:00
|
|
|
GID_CHECK_USED(g);
|
2006-06-20 10:45:04 +02:00
|
|
|
|
|
|
|
|
if(grants[g].cp_flags & CPF_DIRECT) {
|
|
|
|
|
if(granter) *granter = SELF;
|
|
|
|
|
if(grantee) *grantee = grants[g].cp_u.cp_direct.cp_who_to;
|
|
|
|
|
} else if(grants[g].cp_flags & CPF_MAGIC) {
|
|
|
|
|
if(granter) *granter = grants[g].cp_u.cp_magic.cp_who_from;
|
|
|
|
|
if(grantee) *grantee = grants[g].cp_u.cp_magic.cp_who_to;
|
|
|
|
|
} else return -1;
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
2012-03-25 20:25:53 +02:00
|
|
|
int
|
2010-03-10 14:19:27 +01:00
|
|
|
cpf_getgrants(cp_grant_id_t *grant_ids, int n)
|
2006-06-26 18:08:42 +02:00
|
|
|
{
|
|
|
|
|
int i;
|
|
|
|
|
|
|
|
|
|
for(i = 0; i < n; i++) {
|
|
|
|
|
if((grant_ids[i] = cpf_new_grantslot()) < 0)
|
|
|
|
|
break;
|
2006-06-27 16:15:47 +02:00
|
|
|
grants[grant_ids[i]].cp_flags = CPF_USED;
|
2006-06-26 18:08:42 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* return however many grants were assigned. */
|
|
|
|
|
return i;
|
|
|
|
|
}
|
|
|
|
|
|
2012-03-25 20:25:53 +02:00
|
|
|
int
|
2006-06-26 18:08:42 +02:00
|
|
|
cpf_setgrant_direct(gid, who, addr, bytes, access)
|
|
|
|
|
cp_grant_id_t gid;
|
|
|
|
|
endpoint_t who;
|
|
|
|
|
vir_bytes addr;
|
|
|
|
|
size_t bytes;
|
|
|
|
|
int access;
|
|
|
|
|
{
|
|
|
|
|
GID_CHECK(gid);
|
|
|
|
|
ACCESS_CHECK(access);
|
|
|
|
|
|
2010-01-14 16:24:16 +01:00
|
|
|
/* Check click alignment in case of memory mapping grant. */
|
|
|
|
|
if(access & CPF_MAP) {
|
|
|
|
|
CLICK_ALIGNMENT_CHECK(addr, bytes);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Fill in new slot data. */
|
2006-06-27 14:19:45 +02:00
|
|
|
grants[gid].cp_flags = access | CPF_DIRECT | CPF_USED | CPF_VALID;
|
2006-06-26 18:08:42 +02:00
|
|
|
grants[gid].cp_u.cp_direct.cp_who_to = who;
|
|
|
|
|
grants[gid].cp_u.cp_direct.cp_start = addr;
|
|
|
|
|
grants[gid].cp_u.cp_direct.cp_len = bytes;
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
2012-03-25 20:25:53 +02:00
|
|
|
int
|
2006-06-26 18:08:42 +02:00
|
|
|
cpf_setgrant_indirect(gid, who_to, who_from, his_gid)
|
|
|
|
|
cp_grant_id_t gid;
|
|
|
|
|
endpoint_t who_to, who_from;
|
|
|
|
|
cp_grant_id_t his_gid;
|
|
|
|
|
{
|
|
|
|
|
GID_CHECK(gid);
|
|
|
|
|
|
|
|
|
|
/* Fill in new slot data. */
|
2006-06-27 14:19:45 +02:00
|
|
|
grants[gid].cp_flags = CPF_USED | CPF_INDIRECT | CPF_VALID;
|
2006-06-26 18:08:42 +02:00
|
|
|
grants[gid].cp_u.cp_indirect.cp_who_to = who_to;
|
|
|
|
|
grants[gid].cp_u.cp_indirect.cp_who_from = who_from;
|
|
|
|
|
grants[gid].cp_u.cp_indirect.cp_grant = his_gid;
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
2012-03-25 20:25:53 +02:00
|
|
|
int
|
2006-06-26 18:08:42 +02:00
|
|
|
cpf_setgrant_magic(gid, who_to, who_from, addr, bytes, access)
|
|
|
|
|
cp_grant_id_t gid;
|
|
|
|
|
endpoint_t who_to, who_from;
|
|
|
|
|
vir_bytes addr;
|
|
|
|
|
size_t bytes;
|
|
|
|
|
int access;
|
|
|
|
|
{
|
|
|
|
|
GID_CHECK(gid);
|
|
|
|
|
ACCESS_CHECK(access);
|
|
|
|
|
|
2010-01-14 16:24:16 +01:00
|
|
|
/* Check click alignment in case of memory mapping grant. */
|
|
|
|
|
if(access & CPF_MAP) {
|
|
|
|
|
CLICK_ALIGNMENT_CHECK(addr, bytes);
|
|
|
|
|
}
|
|
|
|
|
|
2006-06-26 18:08:42 +02:00
|
|
|
/* Fill in new slot data. */
|
2006-06-27 14:19:45 +02:00
|
|
|
grants[gid].cp_flags = CPF_USED | CPF_MAGIC | CPF_VALID | access;
|
2006-06-26 18:08:42 +02:00
|
|
|
grants[gid].cp_u.cp_magic.cp_who_to = who_to;
|
|
|
|
|
grants[gid].cp_u.cp_magic.cp_who_from = who_from;
|
|
|
|
|
grants[gid].cp_u.cp_magic.cp_start = addr;
|
|
|
|
|
grants[gid].cp_u.cp_magic.cp_len = bytes;
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
2012-03-25 20:25:53 +02:00
|
|
|
int
|
2006-06-27 14:19:45 +02:00
|
|
|
cpf_setgrant_disable(gid)
|
|
|
|
|
cp_grant_id_t gid;
|
|
|
|
|
{
|
|
|
|
|
GID_CHECK(gid);
|
|
|
|
|
|
|
|
|
|
/* Grant is now no longer valid, but still in use. */
|
|
|
|
|
grants[gid].cp_flags = CPF_USED;
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
2012-03-25 20:25:53 +02:00
|
|
|
void
|
2007-04-23 14:12:32 +02:00
|
|
|
cpf_reload(void)
|
|
|
|
|
{
|
|
|
|
|
/* Inform the kernel about the location of the grant table. This is needed
|
|
|
|
|
* after a fork.
|
|
|
|
|
*/
|
|
|
|
|
if (grants)
|
|
|
|
|
sys_setgrant(grants, ngrants); /* Do we need error checking? */
|
|
|
|
|
}
|
2006-07-13 16:50:23 +02:00
|
|
|
|
