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
|
/*
BD translator - Exports Block devices on server side as regular
files to client
Copyright IBM, Corp. 2012
This file is part of GlusterFS.
Author:
M. Mohan Kumar <mohan@in.ibm.com>
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 _BD_H
#define _BD_H
#ifndef _CONFIG_H
#define _CONFIG_H
#include "config.h"
#endif
#ifdef HAVE_LIBAIO
#include <libaio.h>
#endif
#include "xlator.h"
#include "mem-types.h"
#define BD_XLATOR "block device mapper xlator"
#define BACKEND_VG "vg"
#define GF_XATTR "user.glusterfs"
#define BD_XATTR GF_XATTR ".bd"
#define BD_LV "lv"
#define BD_THIN "thin"
#define VOL_TYPE "volume.type"
#define VOL_CAPS "volume.caps"
#define ALIGN_SIZE 4096
#define BD_CAPS_BD 0x01
#define BD_CAPS_THIN 0x02
#define BD_CAPS_OFFLOAD_COPY 0x04
#define BD_CAPS_OFFLOAD_SNAPSHOT 0x08
#define BD_CAPS_OFFLOAD_ZERO 0x20
#define BD_CLONE "clone"
#define BD_SNAPSHOT "snapshot"
#define BD_MERGE "merge"
#define BD_ORIGIN "list-origin"
#define IOV_NR 4
#define IOV_SIZE (64 * 1024)
#define ALIGN_SIZE 4096
#define LINKTO "trusted.glusterfs.dht.linkto"
#define MAX_NO_VECT 1024
#define BD_VALIDATE_MEM_ALLOC(buff, op_errno, label) \
if (!buff) { \
op_errno = ENOMEM; \
gf_log (this->name, GF_LOG_ERROR, "out of memory"); \
goto label; \
}
#define BD_VALIDATE_LOCAL_OR_GOTO(local, op_errno, label) \
if (!local) { \
op_errno = EINVAL; \
goto label; \
}
#define BD_STACK_UNWIND(typ, frame, args ...) do { \
bd_local_t *__local = frame->local; \
xlator_t *__this = frame->this; \
\
frame->local = NULL; \
STACK_UNWIND_STRICT (typ, frame, args); \
if (__local) \
bd_local_free (__this, __local); \
} while (0)
typedef char bd_gfid_t[GF_UUID_BUF_SIZE];
/**
* bd_fd - internal structure
*/
typedef struct bd_fd {
int fd;
int32_t flag;
int odirect;
} bd_fd_t;
typedef struct bd_priv {
lvm_t handle;
char *vg;
char *pool;
int caps;
gf_boolean_t aio_init_done;
gf_boolean_t aio_capable;
gf_boolean_t aio_configured;
#ifdef HAVE_LIBAIO
io_context_t ctxp;
pthread_t aiothread;
#endif
} bd_priv_t;
typedef enum bd_type {
BD_TYPE_NONE,
BD_TYPE_LV,
} bd_type_t;
typedef struct {
struct iatt iatt;
char *type;
} bd_attr_t;
typedef enum {
BD_OF_NONE,
BD_OF_CLONE,
BD_OF_SNAPSHOT,
BD_OF_MERGE,
} bd_offload_t;
typedef struct {
dict_t *dict;
bd_attr_t *bdatt;
inode_t *inode;
loc_t loc;
fd_t *fd;
data_t *data; /* for setxattr */
bd_offload_t offload;
uint64_t size;
loc_t *dloc;
} bd_local_t;
/* Prototypes */
int bd_inode_ctx_set (inode_t *inode, xlator_t *this, bd_attr_t *ctx);
int bd_inode_ctx_get (inode_t *inode, xlator_t *this, bd_attr_t **ctx);
int bd_scan_vg (xlator_t *this, bd_priv_t *priv);
bd_local_t *bd_local_init (call_frame_t *frame, xlator_t *this);
void bd_local_free (xlator_t *this, bd_local_t *local);
int bd_fd_ctx_get (xlator_t *this, fd_t *fd, bd_fd_t **bdfd);
char *page_aligned_alloc (size_t size, char **aligned_buf);
int bd_validate_bd_xattr (xlator_t *this, char *bd, char **type,
uint64_t *lv_size, uuid_t uuid);
uint64_t bd_get_default_extent (bd_priv_t *priv);
uint64_t bd_adjust_size (bd_priv_t *priv, size_t size);
int bd_create (uuid_t uuid, uint64_t size, char *type, bd_priv_t *priv);
int bd_resize (bd_priv_t *priv, uuid_t uuid, size_t size);
int bd_delete_lv (bd_priv_t *priv, const char *lv_name, int *op_errno);
int bd_snapshot_create (bd_local_t *local, bd_priv_t *priv);
int bd_clone (bd_local_t *local, bd_priv_t *priv);
int bd_merge (bd_priv_t *priv, uuid_t gfid);
int bd_get_origin (bd_priv_t *priv, loc_t *loc, fd_t *fd, dict_t *dict);
void bd_update_amtime(struct iatt *iatt, int flag);
int bd_snapshot_create (bd_local_t *local, bd_priv_t *priv);
int bd_clone (bd_local_t *local, bd_priv_t *priv);
int bd_merge (bd_priv_t *priv, uuid_t gfid);
int bd_get_origin (bd_priv_t *priv, loc_t *loc, fd_t *fd, dict_t *dict);
int bd_do_zerofill(call_frame_t *frame, xlator_t *this, fd_t *fd,
off_t offset, size_t len, struct iatt *prebuf,
struct iatt *postbuf);
#endif
|
