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
|
/*
Copyright (c) 2008-2012 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.
*/
#include <sys/uio.h>
#include "glusterfs/common-utils.h"
#include "glusterfs/xlator.h"
#include "glusterfs/graph-utils.h"
#include "glusterfs/libglusterfs-messages.h"
struct gf_printer {
ssize_t (*write)(struct gf_printer *gp, char *buf, size_t len);
void *priv;
int len;
};
static ssize_t
gp_write_file(struct gf_printer *gp, char *buf, size_t len)
{
FILE *f = gp->priv;
if (fwrite(buf, len, 1, f) != 1) {
gf_msg("graph-print", GF_LOG_ERROR, errno, LG_MSG_FWRITE_FAILED,
"fwrite failed");
return -1;
}
return len;
}
static ssize_t
gp_write_buf(struct gf_printer *gp, char *buf, size_t len)
{
struct iovec *iov = gp->priv;
if (iov->iov_len < len) {
gf_msg("graph-print", GF_LOG_ERROR, 0, LG_MSG_BUFFER_FULL,
"buffer full");
return -1;
}
memcpy(iov->iov_base, buf, len);
iov->iov_base += len;
iov->iov_len -= len;
return len;
}
static int
gpprintf(struct gf_printer *gp, const char *format, ...)
{
va_list arg;
char *str = NULL;
int ret = 0;
va_start(arg, format);
ret = gf_vasprintf(&str, format, arg);
va_end(arg);
if (ret < 0)
return ret;
ret = gp->write(gp, str, ret);
GF_FREE(str);
return ret;
}
#define GPPRINTF(gp, fmt, ...) \
do { \
ret = gpprintf(gp, fmt, ##__VA_ARGS__); \
if (ret == -1) \
goto out; \
else \
gp->len += ret; \
} while (0)
static int
_print_volume_options(dict_t *d, char *k, data_t *v, void *tmp)
{
struct gf_printer *gp = tmp;
int ret = 0;
GPPRINTF(gp, " option %s %s\n", k, v->data);
return 0;
out:
/* means, it is a failure */
return -1;
}
static int
glusterfs_graph_print(struct gf_printer *gp, glusterfs_graph_t *graph)
{
xlator_t *trav = NULL;
xlator_list_t *xch = NULL;
int ret = 0;
ssize_t len = 0;
if (!graph->first)
return 0;
for (trav = graph->first; trav->next; trav = trav->next)
;
for (; trav; trav = trav->prev) {
GPPRINTF(gp, "volume %s\n type %s\n", trav->name, trav->type);
ret = dict_foreach(trav->options, _print_volume_options, gp);
if (ret)
goto out;
if (trav->children) {
GPPRINTF(gp, " subvolumes");
for (xch = trav->children; xch; xch = xch->next)
GPPRINTF(gp, " %s", xch->xlator->name);
GPPRINTF(gp, "\n");
}
GPPRINTF(gp, "end-volume\n");
if (trav != graph->first)
GPPRINTF(gp, "\n");
}
out:
len = gp->len;
if (ret == -1) {
gf_msg("graph-print", GF_LOG_ERROR, 0, LG_MSG_PRINT_FAILED,
"printing failed");
return -1;
}
return len;
#undef GPPRINTF
}
int
glusterfs_graph_print_file(FILE *file, glusterfs_graph_t *graph)
{
struct gf_printer gp = {.write = gp_write_file, .priv = file};
return glusterfs_graph_print(&gp, graph);
}
char *
glusterfs_graph_print_buf(glusterfs_graph_t *graph)
{
FILE *f = NULL;
struct iovec iov = {
0,
};
int len = 0;
char *buf = NULL;
struct gf_printer gp = {.write = gp_write_buf, .priv = &iov};
f = fopen("/dev/null", "a");
if (!f) {
gf_msg("graph-print", GF_LOG_ERROR, errno, LG_MSG_DIR_OP_FAILED,
"cannot open /dev/null");
return NULL;
}
len = glusterfs_graph_print_file(f, graph);
fclose(f);
if (len == -1)
return NULL;
buf = GF_CALLOC(1, len + 1, gf_common_mt_graph_buf);
if (!buf) {
return NULL;
}
iov.iov_base = buf;
iov.iov_len = len;
len = glusterfs_graph_print(&gp, graph);
if (len == -1) {
GF_FREE(buf);
return NULL;
}
return buf;
}
|
