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/*
Copyright (c) 2015 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 __UPCALL_H__
#define __UPCALL_H__
#ifndef _CONFIG_H
#define _CONFIG_H
#include "config.h"
#endif
#include "compat-errno.h"
#include "stack.h"
#include "call-stub.h"
#include "upcall-mem-types.h"
#include "client_t.h"
#include "rpcsvc.h"
#include "lkowner.h"
#include "locking.h"
#include "upcall-messages.h"
#include "upcall-cache-invalidation.h"
#define EXIT_IF_UPCALL_OFF(label) do { \
if (!(ON_CACHE_INVALIDATION)) \
goto label; \
} while (0)
#define UPCALL_STACK_UNWIND(fop, frame, params ...) do { \
upcall_local_t *__local = NULL; \
xlator_t *__xl = NULL; \
if (frame) { \
__xl = frame->this; \
__local = frame->local; \
frame->local = NULL; \
} \
STACK_UNWIND_STRICT (fop, frame, params); \
upcall_local_wipe (__xl, __local); \
} while (0)
#define UPCALL_STACK_DESTROY(frame) do { \
upcall_local_t *__local = NULL; \
xlator_t *__xl = NULL; \
__xl = frame->this; \
__local = frame->local; \
frame->local = NULL; \
STACK_DESTROY (frame->root); \
upcall_local_wipe (__xl, __local); \
} while (0)
struct _upcalls_private_t {
int client_id; /* Not sure if reqd */
};
typedef struct _upcalls_private_t upcalls_private_t;
enum _upcall_event_type_t {
EVENT_NULL,
CACHE_INVALIDATION,
};
typedef enum _upcall_event_type_t upcall_event_type_t;
struct _upcall_client_t {
struct list_head client_list;
/* strdup to store client_uid, strdup. Free it explicitly */
char *client_uid;
time_t access_time; /* time last accessed */
/* the amount of time which client can cache this entry */
uint32_t expire_time_attr;
};
typedef struct _upcall_client_t upcall_client_t;
/* Upcall entries are maintained in inode_ctx */
struct _upcall_inode_ctx_t {
struct list_head client_list;
pthread_mutex_t client_list_lock; /* mutex for clients list
of this upcall entry */
};
typedef struct _upcall_inode_ctx_t upcall_inode_ctx_t;
struct _notify_event_data {
uuid_t gfid;
upcall_client_t *client_entry;
upcall_event_type_t event_type;
uint32_t invalidate_flags;
/* any extra data needed, like inode flags
* to be invalidated incase of cache invalidation,
* may be fd for lease recalls */
void *extra;
};
typedef struct _notify_event_data notify_event_data_t;
struct upcall_local {
/* XXX: need to check if we can store
* pointers in 'local' which may get freed
* in future by other thread
*/
upcall_inode_ctx_t *upcall_inode_ctx;
inode_t *inode;
};
typedef struct upcall_local upcall_local_t;
void upcall_local_wipe (xlator_t *this, upcall_local_t *local);
upcall_local_t *upcall_local_init (call_frame_t *frame, xlator_t *this, inode_t *inode);
upcall_client_t *add_upcall_client (call_frame_t *frame, uuid_t gfid,
client_t *client,
upcall_inode_ctx_t *up_inode_ctx);
upcall_client_t *__add_upcall_client (call_frame_t *frame, uuid_t gfid,
client_t *client,
upcall_inode_ctx_t *up_inode_ctx);
upcall_client_t *__get_upcall_client (call_frame_t *frame, uuid_t gfid,
client_t *client,
upcall_inode_ctx_t *up_inode_ctx);
int __upcall_cleanup_client_entry (upcall_client_t *up_client);
int __upcall_inode_ctx_set (inode_t *inode, xlator_t *this);
upcall_inode_ctx_t *__upcall_inode_ctx_get (inode_t *inode, xlator_t *this);
upcall_inode_ctx_t *upcall_inode_ctx_get (inode_t *inode, xlator_t *this);
int upcall_cleanup_inode_ctx (xlator_t *this, inode_t *inode);
void upcall_cache_invalidate (call_frame_t *frame, xlator_t *this, client_t *client,
inode_t *inode, uint32_t flags);
void upcall_client_cache_invalidate (xlator_t *xl, uuid_t gfid,
upcall_client_t *up_client_entry,
uint32_t flags);
void upcall_cache_forget (xlator_t *this, inode_t *inode,
upcall_inode_ctx_t *up_inode_ctx);
#endif /* __UPCALL_H__ */
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