summaryrefslogtreecommitdiffstats
path: root/libglusterfsclient/src/libglusterfsclient-internals.h
blob: 40ad6f6929fc943d3c18d3ba2fed3915f1167145 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
/*
   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