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
|
/*
Copyright (c) 2014 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 __META_H__
#define __META_H__
#include "strfd.h"
#define DEFAULT_META_DIR_NAME ".meta"
#define META_ROOT_GFID "ba926388-bb9c-4eec-ad60-79dba4cc083a"
#define IS_META_ROOT_GFID(g) (strcmp(uuid_utoa(g), META_ROOT_GFID) == 0)
typedef int (*meta_hook_t)(call_frame_t *frame, xlator_t *this, loc_t *loc,
dict_t *xdata);
typedef struct {
dict_t *xdata;
} meta_local_t;
typedef struct {
char *meta_dir_name;
} meta_priv_t;
struct meta_dirent {
const char *name;
ia_type_t type;
meta_hook_t hook;
};
#define DOT_DOTDOT \
{.name = ".", .type = IA_IFDIR}, { .name = "..", .type = IA_IFDIR }
struct meta_ops {
struct meta_dirent *fixed_dirents;
int (*dir_fill)(xlator_t *this, inode_t *dir, struct meta_dirent **entries);
int (*file_fill)(xlator_t *this, inode_t *file, strfd_t *strfd);
int (*iatt_fill)(xlator_t *this, inode_t *inode, struct iatt *iatt);
int (*link_fill)(xlator_t *this, inode_t *inode, strfd_t *strfd);
int (*file_write)(xlator_t *this, fd_t *fd, struct iovec *iov, int count);
struct xlator_fops fops;
struct xlator_cbks cbks;
};
typedef struct {
char *data;
struct meta_dirent *dirents;
size_t size;
} meta_fd_t;
#define COUNT(arr) (sizeof(arr) / sizeof(arr[0]))
#define META_HOOK(loc) \
(__is_root_gfid(loc->pargfid) && \
!strcmp(loc->name, META_PRIV(THIS)->meta_dir_name))
#define META_PRIV(t) ((meta_priv_t *)(t->private))
#define META_STACK_UNWIND(fop, frame, params...) \
do { \
meta_local_t *__local = NULL; \
xlator_t *__this = NULL; \
if (frame) { \
__local = frame->local; \
__this = frame->this; \
frame->local = NULL; \
} \
STACK_UNWIND_STRICT(fop, frame, params); \
if (__local) { \
meta_local_cleanup(__local, __this); \
} \
} while (0)
#define META_FOP(i, fop, fr, t, params...) \
{ \
struct xlator_fops *_fops = NULL; \
\
_fops = meta_fops_get(i, t); \
\
_fops->fop(fr, t, params); \
} \
while (0)
void
meta_iatt_fill(struct iatt *iatt, inode_t *inode, ia_type_t type);
int
meta_inode_discover(call_frame_t *frame, xlator_t *this, loc_t *loc,
dict_t *xdata);
int
meta_ops_set(inode_t *inode, xlator_t *this, struct meta_ops *ops);
struct xlator_fops *
meta_fops_get(inode_t *inode, xlator_t *this);
struct xlator_cbks *
meta_cbks_get(inode_t *inode, xlator_t *this);
struct meta_ops *
meta_ops_get(inode_t *inode, xlator_t *this);
int
meta_ctx_set(inode_t *inode, xlator_t *this, void *ctx);
void *
meta_ctx_get(inode_t *inode, xlator_t *this);
void
meta_local_cleanup(meta_local_t *local, xlator_t *this);
struct xlator_fops *
meta_defaults_init(struct xlator_fops *fops);
meta_fd_t *
meta_fd_get(fd_t *fd, xlator_t *this);
int
meta_fd_release(fd_t *fd, xlator_t *this);
dict_t *
meta_direct_io_mode(dict_t *xdata, call_frame_t *frame);
meta_local_t *
meta_local(call_frame_t *frame);
int
meta_file_fill(xlator_t *this, fd_t *fd);
int
meta_dir_fill(xlator_t *this, fd_t *fd);
int
fixed_dirents_len(struct meta_dirent *dirents);
#endif /* __META_H__ */
|
