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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__
#include "compat-errno.h"
#include "upcall-mem-types.h"
#include "client_t.h"
#include "upcall-messages.h"
#include "upcall-cache-invalidation.h"
#include "upcall-utils.h"
#define EXIT_IF_UPCALL_OFF(this, label) do { \
if (!is_upcall_enabled(this)) \
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 _upcall_private {
gf_boolean_t cache_invalidation_enabled;
int32_t cache_invalidation_timeout;
struct list_head inode_ctx_list;
gf_lock_t inode_ctx_lk;
gf_boolean_t reaper_init_done;
pthread_t reaper_thr;
int32_t fini;
dict_t *xattrs; /* list of xattrs registered by clients
for receiving invalidation */
};
typedef struct _upcall_private upcall_private_t;
struct _upcall_client {
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 upcall_client_t;
/* Upcall entries are maintained in inode_ctx */
struct _upcall_inode_ctx {
struct list_head inode_ctx_list;
struct list_head client_list;
pthread_mutex_t client_list_lock; /* mutex for clients list
of this upcall entry */
int destroy;
uuid_t gfid; /* gfid of the entry */
};
typedef struct _upcall_inode_ctx upcall_inode_ctx_t;
struct upcall_local {
/* XXX: need to check if we can store
* pointers in 'local' which may get freed
* in future by other thread
*/
inode_t *inode;
loc_t rename_oldloc;
loc_t loc; /* required for stat in *xattr_cbk */
fd_t *fd; /* required for fstat in *xattr_cbk */
dict_t *xattr;
};
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,
loc_t *loc, fd_t *fd, inode_t *inode,
dict_t *xattr);
upcall_client_t *add_upcall_client (call_frame_t *frame, client_t *client,
upcall_inode_ctx_t *up_inode_ctx);
upcall_client_t *__add_upcall_client (call_frame_t *frame, client_t *client,
upcall_inode_ctx_t *up_inode_ctx);
upcall_client_t *__get_upcall_client (call_frame_t *frame, client_t *client,
upcall_inode_ctx_t *up_inode_ctx);
int __upcall_cleanup_client_entry (upcall_client_t *up_client);
int upcall_cleanup_expired_clients (xlator_t *this,
upcall_inode_ctx_t *up_inode_ctx);
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_forget (xlator_t *this, inode_t *inode,
upcall_inode_ctx_t *up_inode_ctx);
void *upcall_reaper_thread (void *data);
int upcall_reaper_thread_init (xlator_t *this);
/* Xlator options */
gf_boolean_t is_upcall_enabled (xlator_t *this);
/* Cache invalidation specific */
void upcall_cache_invalidate (call_frame_t *frame, xlator_t *this,
client_t *client, inode_t *inode,
uint32_t flags, struct iatt *stbuf,
struct iatt *p_stbuf,
struct iatt *oldp_stbuf, dict_t *xattr);
void upcall_client_cache_invalidate (xlator_t *xl, uuid_t gfid,
upcall_client_t *up_client_entry,
uint32_t flags, struct iatt *stbuf,
struct iatt *p_stbuf,
struct iatt *oldp_stbuf, dict_t *xattr);
int up_filter_xattr (dict_t *xattr, dict_t *regd_xattrs);
int up_compare_afr_xattr (dict_t *d, char *k, data_t *v, void *tmp);
gf_boolean_t up_invalidate_needed (dict_t *xattrs);
#endif /* __UPCALL_H__ */
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