summaryrefslogtreecommitdiffstats
path: root/xlators/mount/fuse/src/fuse-bridge.h
blob: 4929252e169a170136b44ad1be5c732fcebfc64c (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
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
/*
   Copyright (c) 2006-2009 Gluster, Inc. <http://www.gluster.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 _GF_FUSE_BRIDGE_H_
#define _GF_FUSE_BRIDGE_H_

#include <stdint.h>
#include <signal.h>
#include <pthread.h>
#include <stddef.h>
#include <dirent.h>
#include <sys/mount.h>
#include <sys/time.h>
#include <sys/wait.h>
#include <fnmatch.h>

#ifndef _CONFIG_H
#define _CONFIG_H
#include "config.h"
#endif /* _CONFIG_H */

#include "glusterfs.h"
#include "logging.h"
#include "xlator.h"
#include "defaults.h"
#include "common-utils.h"
#include "glusterfsd-common.h"
#include "statedump.h"

#ifdef GF_DARWIN_HOST_OS
/* This is MacFUSE's marker for MacFUSE-specific code */
#define __FreeBSD__ 10
#include "fuse_kernel_macfuse.h"
#else
#include "fuse_kernel.h"
#endif
#include "fuse-misc.h"
#include "fuse-mount.h"
#include "fuse-mem-types.h"

#include "list.h"
#include "dict.h"

/* TODO: when supporting posix acl, remove this definition */
#define DISABLE_POSIX_ACL

#ifdef GF_LINUX_HOST_OS
#define FUSE_OP_HIGH (FUSE_POLL + 1)
#endif
#ifdef GF_DARWIN_HOST_OS
#define FUSE_OP_HIGH (FUSE_DESTROY + 1)
#endif
#define GLUSTERFS_XATTR_LEN_MAX  65536

#define MAX_FUSE_PROC_DELAY 1

typedef struct fuse_in_header fuse_in_header_t;
typedef void (fuse_handler_t) (xlator_t *this, fuse_in_header_t *finh,
                               void *msg);

struct fuse_private {
        int                  fd;
        uint32_t             proto_minor;
        char                *volfile;
        size_t               volfile_size;
        char                *mount_point;
        struct iobuf        *iobuf;

        pthread_t            fuse_thread;
        char                 fuse_thread_started;

        uint32_t             direct_io_mode;
        char                 can_exec_directio;
        size_t              *msg0_len_p;

        double               entry_timeout;
        double               attribute_timeout;

        pthread_cond_t       sync_cond;
        pthread_mutex_t      sync_mutex;
        char                 child_up;

        char                 init_recvd;

        gf_boolean_t         strict_volfile_check;

        fuse_handler_t     **fuse_ops;
        fuse_handler_t     **fuse_ops0;
        fuse_handler_t    ***fuse_ops_flipped;
        pthread_mutex_t      fuse_dump_mutex;
        int                  fuse_dump_fd;
        char                 pre_test_stage;

        glusterfs_graph_t   *next_graph;
        xlator_t            *active_subvol;
};
typedef struct fuse_private fuse_private_t;

#define _FH_TO_FD(fh) ((fd_t *)(uintptr_t)(fh))

#define FH_TO_FD(fh) ((_FH_TO_FD (fh))?(fd_ref (_FH_TO_FD (fh))):((fd_t *) 0))

#define FUSE_FOP(state, ret, op_num, fop, args ...)                     \
        do {                                                            \
                call_frame_t *frame = NULL;                             \
                xlator_t *xl = NULL;                                    \
                                                                        \
                frame = get_call_frame_for_req (state);                 \
                if (!frame) {                                           \
                         /* This is not completely clean, as some       \
                          * earlier allocations might remain unfreed    \
                          * if we return at this point, but still       \
                          * better than trying to go on with a NULL     \
                          * frame ...                                   \
                          */                                            \
                        gf_log ("glusterfs-fuse",                       \
                                GF_LOG_ERROR,                           \
                                "FUSE message"                          \
                                " unique %"PRIu64" opcode %d:"          \
                                " frame allocation failed",             \
                                state->finh->unique,                    \
                                state->finh->opcode);                   \
                        free_fuse_state (state);                        \
                        return;                                         \
                }                                                       \
                                                                        \
                frame->root->state = state;                             \
                frame->root->op    = op_num;                            \
                frame->op          = op_num;                            \
                                                                        \
                xl = fuse_state_subvol (state);                         \
                if (!xl) {                                              \
                        gf_log ("glusterfs-fuse", GF_LOG_ERROR,         \
                                "xl is NULL");                          \
                        send_fuse_err (state->this, state->finh, ENOENT); \
                        free_fuse_state (state);                        \
                        STACK_DESTROY (frame->root);                    \
                } else {                                                \
                        STACK_WIND (frame, ret, xl, xl->fops->fop, args); \
                }                                                       \
        } while (0)


#define FUSE_FOP_COOKIE(state, xl, ret, cky, op_num, fop, args ...)     \
        do {                                                            \
                call_frame_t *frame = NULL;                             \
                                                                        \
                frame = get_call_frame_for_req (state);                 \
                if (!frame) {                                           \
                        gf_log ("glusterfs-fuse",                       \
                                GF_LOG_ERROR,                           \
                                "FUSE message"                          \
                                " unique %"PRIu64" opcode %d:"          \
                                " frame allocation failed",             \
                                state->finh->unique,                    \
                                state->finh->opcode);                   \
                        free_fuse_state (state);                        \
                        return 0;                                       \
                }                                                       \
                                                                        \
                frame->root->state = state;                             \
                frame->root->op    = op_num;                            \
		frame->op          = op_num;				\
                STACK_WIND_COOKIE (frame, ret, cky, xl, xl->fops->fop, args); \
        } while (0)

#define GF_SELECT_LOG_LEVEL(_errno)                     \
        (((_errno == ENOENT) || (_errno == ESTALE))?    \
         GF_LOG_DEBUG)

#define GET_STATE(this, finh, state)                                       \
        do {                                                               \
                state = get_fuse_state (this, finh);                       \
                if (!state) {                                              \
                        gf_log ("glusterfs-fuse",                          \
                                GF_LOG_ERROR,                              \
                                "FUSE message unique %"PRIu64" opcode %d:" \
                                " state allocation failed",                \
                                finh->unique, finh->opcode);               \
                                                                           \
                        send_fuse_err (this, finh, ENOMEM);                \
                        GF_FREE (finh);                                    \
                                                                           \
                        return;                                            \
                }                                                          \
        } while (0)



typedef enum {
        RESOLVE_MUST = 1,
        RESOLVE_NOT,
        RESOLVE_MAY,
        RESOLVE_DONTCARE,
        RESOLVE_EXACT
} gf_resolve_type_t;

struct gf_resolve_comp {
        char      *basename;
        ino_t      ino;
        uint64_t   gen;
        inode_t   *inode;
};

typedef struct {
        gf_resolve_type_t      type;
        ino_t                  ino;
        uint64_t               gen;
        ino_t                  par;
        fd_t                  *fd;
        char                  *path;
        char                  *bname;
	char                  *resolved;
        int                    op_ret;
        int                    op_errno;
        loc_t                  deep_loc;
        struct gf_resolve_comp *components;
        int                    comp_count;
} gf_resolve_t;


typedef struct {
        void             *pool;
        xlator_t         *this;
        inode_table_t    *itable;
        loc_t             loc;
        loc_t             loc2;
        fuse_in_header_t *finh;
        int32_t           flags;
        off_t             off;
        size_t            size;
        unsigned long     nlookup;
        fd_t             *fd;
        dict_t           *dict;
        char             *name;
        char              is_revalidate;
        gf_boolean_t      truncate_needed;
        gf_lock_t         lock;
        uint64_t          lk_owner;

        /* used within resolve_and_resume */
        /* */
        gf_resolve_t resolve;
        gf_resolve_t resolve2;

        loc_t        *loc_now;
        gf_resolve_t *resolve_now;

        void *resume_fn;

        int            valid;
        int            mask;
        dev_t          rdev;
        mode_t         mode;
        struct iatt    attr;
        struct flock   lk_lock;
        struct iovec   vector;
} fuse_state_t;

typedef void (*fuse_resume_fn_t) (fuse_state_t *state);

GF_MUST_CHECK int32_t
fuse_loc_fill (loc_t *loc, fuse_state_t *state, ino_t ino,
               ino_t par, const char *name);
call_frame_t *get_call_frame_for_req (fuse_state_t *state);
fuse_state_t *get_fuse_state (xlator_t *this, fuse_in_header_t *finh);
void free_fuse_state (fuse_state_t *state);
void gf_fuse_stat2attr (struct iatt *st, struct fuse_attr *fa);
uint64_t inode_to_fuse_nodeid (inode_t *inode);
xlator_t *fuse_state_subvol (fuse_state_t *state);
xlator_t *fuse_active_subvol (xlator_t *fuse);
inode_t *fuse_ino_to_inode (uint64_t ino, xlator_t *fuse);
int fuse_resolve_and_resume (fuse_state_t *state, fuse_resume_fn_t fn);
int is_gf_log_command (xlator_t *this, const char *name, char *value);
int send_fuse_err (xlator_t *this, fuse_in_header_t *finh, int error);
#endif /* _GF_FUSE_BRIDGE_H_ */