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/*
Copyright (c) 2008-2009 Z RESEARCH, Inc. <http://www.zresearch.com>
This file is part of GlusterFS.
GlusterFS is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
by the Free Software Foundation; either version 3 of the License,
or (at your option) any later version.
GlusterFS is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see
<http://www.gnu.org/licenses/>.
*/
#ifndef __LIBGLUSTERFSCLIENT_INTERNALS_H
#define __LIBGLUSTERFSCLIENT_INTERNALS_H
#include <glusterfs.h>
#include <logging.h>
#include <inode.h>
#include <pthread.h>
#include <stack.h>
#include <list.h>
#include <signal.h>
#include <call-stub.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <fd.h>
#include <dirent.h>
typedef void (*sighandler_t) (int);
typedef struct list_head list_head_t;
typedef struct libglusterfs_client_ctx {
glusterfs_ctx_t gf_ctx;
inode_table_t *itable;
pthread_t reply_thread;
call_pool_t pool;
uint32_t counter;
time_t lookup_timeout;
time_t stat_timeout;
}libglusterfs_client_ctx_t;
typedef struct signal_handler {
int signo;
sighandler_t handler;
list_head_t next;
}libgf_client_signal_handler_t ;
typedef struct {
pthread_mutex_t lock;
pthread_cond_t reply_cond;
call_stub_t *reply_stub;
char complete;
union {
struct {
char is_revalidate;
loc_t *loc;
int32_t size;
} lookup;
}fop;
}libgf_client_local_t;
typedef struct {
pthread_cond_t init_con_established;
pthread_mutex_t lock;
char complete;
}libglusterfs_client_private_t;
typedef struct {
pthread_mutex_t lock;
uint32_t previous_lookup_time;
uint32_t previous_stat_time;
struct stat stbuf;
} libglusterfs_client_inode_ctx_t;
typedef struct {
pthread_mutex_t lock;
off_t offset;
libglusterfs_client_ctx_t *ctx;
/* `man readdir` says readdir is non-re-entrant
* only if two readdirs are racing on the same
* handle.
*/
struct dirent dirp;
} libglusterfs_client_fd_ctx_t;
typedef struct libglusterfs_client_async_local {
void *cbk_data;
union {
struct {
fd_t *fd;
glusterfs_readv_cbk_t cbk;
}readv_cbk;
struct {
fd_t *fd;
glusterfs_write_cbk_t cbk;
}write_cbk;
struct {
fd_t *fd;
}close_cbk;
struct {
void *buf;
size_t size;
loc_t *loc;
char is_revalidate;
glusterfs_get_cbk_t cbk;
}lookup_cbk;
}fop;
}libglusterfs_client_async_local_t;
#define LIBGF_STACK_WIND_AND_WAIT(frame, rfn, obj, fn, params ...) \
do { \
STACK_WIND (frame, rfn, obj, fn, params); \
pthread_mutex_lock (&local->lock); \
{ \
while (!local->complete) { \
pthread_cond_wait (&local->reply_cond, \
&local->lock); \
} \
} \
pthread_mutex_unlock (&local->lock); \
} while (0)
#define LIBGF_CLIENT_SIGNAL(signal_handler_list, signo, handler) \
do { \
libgf_client_signal_handler_t *libgf_handler = CALLOC (1, \
sizeof (*libgf_handler)); \
ERR_ABORT (libgf_handler); \
libgf_handler->signo = signo; \
libgf_handler->handler = signal (signo, handler); \
list_add (&libgf_handler->next, signal_handler_list); \
} while (0)
#define LIBGF_INSTALL_SIGNAL_HANDLERS(signal_handlers) \
do { \
INIT_LIST_HEAD (&signal_handlers); \
/* Handle SIGABORT and SIGSEGV */ \
LIBGF_CLIENT_SIGNAL (&signal_handlers, SIGSEGV, gf_print_trace); \
LIBGF_CLIENT_SIGNAL (&signal_handlers, SIGABRT, gf_print_trace); \
LIBGF_CLIENT_SIGNAL (&signal_handlers, SIGHUP, gf_log_logrotate); \
/* LIBGF_CLIENT_SIGNAL (SIGTERM, glusterfs_cleanup_and_exit); */ \
} while (0)
#define LIBGF_RESTORE_SIGNAL_HANDLERS(local) \
do { \
libgf_client_signal_handler_t *ptr = NULL, *tmp = NULL; \
list_for_each_entry_safe (ptr, tmp, &local->signal_handlers,\
next) { \
signal (ptr->signo, ptr->handler); \
FREE (ptr); \
} \
} while (0)
#define LIBGF_CLIENT_FOP_ASYNC(ctx, local, ret_fn, op, args ...) \
do { \
call_frame_t *frame = get_call_frame_for_req (ctx, 1); \
xlator_t *xl = frame->this->children ? \
frame->this->children->xlator : NULL; \
frame->root->state = ctx; \
frame->local = local; \
STACK_WIND (frame, ret_fn, xl, xl->fops->op, args); \
} while (0)
#define LIBGF_CLIENT_FOP(ctx, stub, op, local, args ...) \
do { \
call_frame_t *frame = get_call_frame_for_req (ctx, 1); \
xlator_t *xl = frame->this->children ? \
frame->this->children->xlator : NULL; \
if (!local) { \
local = CALLOC (1, sizeof (*local)); \
} \
ERR_ABORT (local); \
frame->local = local; \
frame->root->state = ctx; \
pthread_cond_init (&local->reply_cond, NULL); \
pthread_mutex_init (&local->lock, NULL); \
LIBGF_STACK_WIND_AND_WAIT (frame, libgf_client_##op##_cbk, xl, \
xl->fops->op, args); \
stub = local->reply_stub; \
FREE (frame->local); \
frame->local = NULL; \
STACK_DESTROY (frame->root); \
} while (0)
#define LIBGF_REPLY_NOTIFY(local) \
do { \
pthread_mutex_lock (&local->lock); \
{ \
local->complete = 1; \
pthread_cond_broadcast (&local->reply_cond); \
} \
pthread_mutex_unlock (&local->lock); \
} while (0)
void
libgf_client_loc_wipe (loc_t *loc);
int32_t
libgf_client_loc_fill (loc_t *loc,
libglusterfs_client_ctx_t *ctx,
ino_t ino,
ino_t par,
const char *name);
int32_t
libgf_client_path_lookup (loc_t *loc,
libglusterfs_client_ctx_t *ctx,
char lookup_basename);
int32_t
libgf_client_lookup (libglusterfs_client_ctx_t *ctx,
loc_t *loc,
struct stat *stbuf,
dict_t **dict,
dict_t *xattr_req);
/* We're not expecting more than 10-15
* VMPs per process so a list is acceptable.
*/
struct vmp_entry {
struct list_head list;
char * vmp;
int vmplen;
glusterfs_handle_t handle;
};
#endif
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