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/*
*------------------------------------------------------------------
* svmdb.h - shared VM database
*
* Copyright (c) 2009 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*------------------------------------------------------------------
*/
#ifndef __included_svmdb_h__
#define __included_svmdb_h__
#include "svm.h"
typedef enum {
SVMDB_ACTION_ILLEGAL=0,
SVMDB_ACTION_GET, /* not clear why anyone would care */
SVMDB_ACTION_SET,
SVMDB_ACTION_UNSET,
} svmdb_action_t;
typedef struct {
int pid;
int signum;
u32 action:4;
u32 opaque:28;
} svmdb_notify_t;
typedef struct {
u8 *value;
svmdb_notify_t *notifications;
u32 elsize;
} svmdb_value_t;
typedef enum {
SVMDB_NAMESPACE_STRING=0,
SVMDB_NAMESPACE_VEC,
SVMDB_N_NAMESPACES,
} svmdb_namespace_t;
typedef struct {
uword version;
/* pool of values */
svmdb_value_t *values;
uword *namespaces [SVMDB_N_NAMESPACES];
} svmdb_shm_hdr_t;
#define SVMDB_SHM_VERSION 2
typedef struct {
int flags;
int pid;
svm_region_t *db_rp;
svmdb_shm_hdr_t *shm;
} svmdb_client_t;
typedef struct {
int add_del;
svmdb_namespace_t nspace;
char *var;
u32 elsize;
int signum;
u32 action:4;
u32 opaque:28;
} svmdb_notification_args_t;
/*
* Must be a reasonable number, several mb smaller than
* SVM_GLOBAL_REGION_SIZE, or no donut for you...
*/
#define SVMDB_DEFAULT_SIZE (4<<20)
svmdb_client_t *svmdb_map (void);
svmdb_client_t *svmdb_map_size (uword size);
svmdb_client_t *svmdb_map_chroot (char *root_path);
svmdb_client_t *svmdb_map_chroot_size (char *root_path, uword size);
void svmdb_unmap (svmdb_client_t *client);
void svmdb_local_unset_string_variable (svmdb_client_t *client, char *var);
void svmdb_local_set_string_variable (svmdb_client_t *client,
char *var, char *val);
char *svmdb_local_get_string_variable (svmdb_client_t *client, char *var);
void *svmdb_local_get_variable_reference (svmdb_client_t *client,
svmdb_namespace_t ns,
char *var);
void svmdb_local_dump_strings (svmdb_client_t *client);
void svmdb_local_unset_vec_variable (svmdb_client_t *client, char *var);
void svmdb_local_set_vec_variable (svmdb_client_t *client,
char *var, void *val, u32 elsize);
void *svmdb_local_get_vec_variable (svmdb_client_t *client, char *var,
u32 elsize);
void svmdb_local_dump_vecs (svmdb_client_t *client);
int svmdb_local_add_del_notification (svmdb_client_t *client,
svmdb_notification_args_t *args);
void *svmdb_local_find_or_add_vec_variable (svmdb_client_t *client,
char *var, u32 nbytes);
#endif /* __included_svmdb_h__ */
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