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/*
Copyright (c) 2008-2012 Red Hat, Inc. <http://www.redhat.com>
This file is part of GlusterFS.
This file is licensed to you under your choice of the GNU Lesser
General Public License, version 3 or any later version (LGPLv3 or
later), or the GNU General Public License, version 2 (GPLv2), in all
cases as published by the Free Software Foundation.
*/
#ifndef _CLIENT_T_H
#define _CLIENT_T_H
#include "glusterfs.h"
#include "locking.h" /* for gf_lock_t, not included by glusterfs.h */
struct client_ctx {
void *ctx_key;
void *ctx_value;
};
typedef struct _client_t {
struct {
/* e.g. protocol/server stashes its ctx here */
gf_lock_t lock;
unsigned short count;
struct client_ctx *ctx;
} scratch_ctx;
struct {
gf_lock_t lock;
volatile int bind;
volatile int count;
} ref;
xlator_t *bound_xl;
xlator_t *this;
int tbl_index;
char *client_uid;
struct {
int flavour;
size_t len;
char *data;
char *username;
char *passwd;
} auth;
} client_t;
#define GF_CLIENTCTX_INITIAL_SIZE 8
struct client_table_entry {
client_t *client;
int next_free;
};
typedef struct client_table_entry cliententry_t;
struct clienttable {
unsigned int max_clients;
gf_lock_t lock;
cliententry_t *cliententries;
int first_free;
client_t *local;
};
typedef struct clienttable clienttable_t;
#define GF_CLIENTTABLE_INITIAL_SIZE 128
/* Signifies no more entries in the client table. */
#define GF_CLIENTTABLE_END -1
/* This is used to invalidate
* the next_free value in an cliententry that has been allocated
*/
#define GF_CLIENTENTRY_ALLOCATED -2
struct rpcsvc_auth_data;
/*
* a more comprehensive feature test is shown at
* http://lists.iptel.org/pipermail/semsdev/2010-October/005075.html
* this is sufficient for RHEL5 i386 builds
*/
#if (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 1)) && !defined(__i386__)
# define INCREMENT_ATOMIC(lk,op) __sync_add_and_fetch(&op, 1)
# define DECREMENT_ATOMIC(lk,op) __sync_sub_and_fetch(&op, 1)
#else
/* These are only here for old gcc, e.g. on RHEL5 i386.
* We're not ever going to use this in an if stmt,
* but let's be pedantically correct for style points */
# define INCREMENT_ATOMIC(lk,op) do { LOCK (&lk); ++op; UNLOCK (&lk); } while (0)
/* this is a gcc 'statement expression', it works with llvm/clang too */
# define DECREMENT_ATOMIC(lk,op) ({ LOCK (&lk); --op; UNLOCK (&lk); op; })
#endif
client_t *
gf_client_get (xlator_t *this, struct rpcsvc_auth_data *cred, char *client_uid);
void
gf_client_put (client_t *client, gf_boolean_t *detached);
clienttable_t *
gf_clienttable_alloc (void);
void
gf_client_clienttable_destroy (clienttable_t *clienttable);
client_t *
gf_client_ref (client_t *client);
void
gf_client_unref (client_t *client);
int
gf_client_dump_fdtable_to_dict (xlator_t *this, dict_t *dict);
int
gf_client_dump_fdtable (xlator_t *this);
int
gf_client_dump_inodes_to_dict (xlator_t *this, dict_t *dict);
int
gf_client_dump_inodes (xlator_t *this);
int
client_ctx_set (client_t *client, void *key, void *value);
int
client_ctx_get (client_t *client, void *key, void **value);
int
client_ctx_del (client_t *client, void *key, void **value);
void
client_ctx_dump (client_t *client, char *prefix);
int
gf_client_dump_fdtables_to_dict (xlator_t *this, dict_t *dict);
int
gf_client_dump_fdtables (xlator_t *this);
int
gf_client_dump_inodes_to_dict (xlator_t *this, dict_t *dict);
int
gf_client_dump_inodes (xlator_t *this);
int
gf_client_disconnect (client_t *client);
#endif /* _CLIENT_T_H */
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