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
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
|
/*
Copyright (c) 2015 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 _CONFIG_H
#define _CONFIG_H
#include "config.h"
#endif
#include "syncop.h"
#include "common-utils.h"
int
syncop_dirfd (xlator_t *subvol, loc_t *loc, fd_t **fd, int pid)
{
int ret = 0;
fd_t *dirfd = NULL;
if (!fd)
return -EINVAL;
dirfd = fd_create (loc->inode, pid);
if (!dirfd) {
gf_log (subvol->name, GF_LOG_ERROR,
"fd_create of %s failed: %s",
uuid_utoa (loc->gfid), strerror(errno));
ret = -errno;
goto out;
}
ret = syncop_opendir (subvol, loc, dirfd, NULL, NULL);
if (ret) {
/*
* On Linux, if the brick was not updated, opendir will
* fail. We therefore use backward compatible code
* that violate the standards by reusing offsets
* in seekdir() from different DIR *, but it works on Linux.
*
* On other systems it never worked, hence we do not need
* to provide backward-compatibility.
*/
#ifdef GF_LINUX_HOST_OS
fd_unref (dirfd);
dirfd = fd_anonymous (loc->inode);
if (!dirfd) {
gf_log(subvol->name, GF_LOG_ERROR,
"fd_anonymous of %s failed: %s",
uuid_utoa (loc->gfid), strerror(errno));
ret = -errno;
goto out;
}
ret = 0;
#else /* GF_LINUX_HOST_OS */
fd_unref (dirfd);
gf_log (subvol->name, GF_LOG_ERROR,
"opendir of %s failed: %s",
uuid_utoa (loc->gfid), strerror(errno));
goto out;
#endif /* GF_LINUX_HOST_OS */
}
out:
if (ret == 0)
*fd = dirfd;
return ret;
}
int
syncop_ftw (xlator_t *subvol, loc_t *loc, int pid, void *data,
int (*fn) (xlator_t *subvol, gf_dirent_t *entry, loc_t *parent,
void *data))
{
loc_t child_loc = {0, };
fd_t *fd = NULL;
uint64_t offset = 0;
gf_dirent_t *entry = NULL;
int ret = 0;
gf_dirent_t entries;
ret = syncop_dirfd (subvol, loc, &fd, pid);
if (ret)
goto out;
INIT_LIST_HEAD (&entries.list);
while ((ret = syncop_readdirp (subvol, fd, 131072, offset, &entries,
NULL, NULL))) {
if (ret < 0)
break;
if (ret > 0) {
/* If the entries are only '.', and '..' then ret
* value will be non-zero. so set it to zero here. */
ret = 0;
}
list_for_each_entry (entry, &entries.list, list) {
offset = entry->d_off;
if (!strcmp (entry->d_name, ".") ||
!strcmp (entry->d_name, ".."))
continue;
gf_link_inode_from_dirent (NULL, fd->inode, entry);
ret = fn (subvol, entry, loc, data);
if (ret)
break;
if (entry->d_stat.ia_type == IA_IFDIR) {
child_loc.inode = inode_ref (entry->inode);
gf_uuid_copy (child_loc.gfid, entry->inode->gfid);
ret = syncop_ftw (subvol, &child_loc,
pid, data, fn);
loc_wipe (&child_loc);
if (ret)
break;
}
}
gf_dirent_free (&entries);
if (ret)
break;
}
out:
if (fd)
fd_unref (fd);
return ret;
}
/**
* Syncop_ftw_throttle can be used in a configurable way to control
* the speed at which crawling is done. It takes 2 more arguments
* compared to syncop_ftw.
* After @count entries are finished in a directory (to be
* precise, @count files) sleep for @sleep_time seconds.
* If either @count or @sleep_time is <=0, then it behaves similar to
* syncop_ftw.
*/
int
syncop_ftw_throttle (xlator_t *subvol, loc_t *loc, int pid, void *data,
int (*fn) (xlator_t *subvol, gf_dirent_t *entry,
loc_t *parent, void *data),
int count, int sleep_time)
{
loc_t child_loc = {0, };
fd_t *fd = NULL;
uint64_t offset = 0;
gf_dirent_t *entry = NULL;
int ret = 0;
gf_dirent_t entries;
int tmp = 0;
if (sleep_time <= 0) {
ret = syncop_ftw (subvol, loc, pid, data, fn);
goto out;
}
ret = syncop_dirfd (subvol, loc, &fd, pid);
if (ret)
goto out;
INIT_LIST_HEAD (&entries.list);
while ((ret = syncop_readdirp (subvol, fd, 131072, offset, &entries,
NULL, NULL))) {
if (ret < 0)
break;
if (ret > 0) {
/* If the entries are only '.', and '..' then ret
* value will be non-zero. so set it to zero here. */
ret = 0;
}
tmp = 0;
list_for_each_entry (entry, &entries.list, list) {
offset = entry->d_off;
if (!strcmp (entry->d_name, ".") ||
!strcmp (entry->d_name, ".."))
continue;
if (++tmp >= count) {
tmp = 0;
sleep (sleep_time);
}
gf_link_inode_from_dirent (NULL, fd->inode, entry);
ret = fn (subvol, entry, loc, data);
if (ret)
continue;
if (entry->d_stat.ia_type == IA_IFDIR) {
child_loc.inode = inode_ref (entry->inode);
gf_uuid_copy (child_loc.gfid, entry->inode->gfid);
ret = syncop_ftw_throttle (subvol, &child_loc,
pid, data, fn, count,
sleep_time);
loc_wipe (&child_loc);
if (ret)
continue;
}
}
gf_dirent_free (&entries);
if (ret)
break;
}
out:
if (fd)
fd_unref (fd);
return ret;
}
int
syncop_dir_scan (xlator_t *subvol, loc_t *loc, int pid, void *data,
int (*fn) (xlator_t *subvol, gf_dirent_t *entry, loc_t *parent,
void *data))
{
fd_t *fd = NULL;
uint64_t offset = 0;
gf_dirent_t *entry = NULL;
int ret = 0;
gf_dirent_t entries;
ret = syncop_dirfd (subvol, loc, &fd, pid);
if (ret)
goto out;
INIT_LIST_HEAD (&entries.list);
while ((ret = syncop_readdir (subvol, fd, 131072, offset, &entries,
NULL, NULL))) {
if (ret < 0)
break;
if (ret > 0) {
/* If the entries are only '.', and '..' then ret
* value will be non-zero. so set it to zero here. */
ret = 0;
}
list_for_each_entry (entry, &entries.list, list) {
offset = entry->d_off;
if (!strcmp (entry->d_name, ".") ||
!strcmp (entry->d_name, ".."))
continue;
ret = fn (subvol, entry, loc, data);
if (ret)
break;
}
gf_dirent_free (&entries);
if (ret)
break;
}
out:
if (fd)
fd_unref (fd);
return ret;
}
int
syncop_is_subvol_local (xlator_t *this, loc_t *loc, gf_boolean_t *is_local)
{
char *pathinfo = NULL;
dict_t *xattr = NULL;
int ret = 0;
if (!this || !this->type || !is_local)
return -EINVAL;
if (strcmp (this->type, "protocol/client") != 0)
return -EINVAL;
*is_local = _gf_false;
ret = syncop_getxattr (this, loc, &xattr, GF_XATTR_PATHINFO_KEY, NULL,
NULL);
if (ret < 0) {
ret = -1;
goto out;
}
if (!xattr) {
ret = -EINVAL;
goto out;
}
ret = dict_get_str (xattr, GF_XATTR_PATHINFO_KEY, &pathinfo);
if (ret)
goto out;
ret = glusterfs_is_local_pathinfo (pathinfo, is_local);
gf_log (this->name, GF_LOG_DEBUG, "subvol %s is %slocal",
this->name, is_local ? "" : "not ");
out:
if (xattr)
dict_unref (xattr);
return ret;
}
int
syncop_gfid_to_path (inode_table_t *itable, xlator_t *subvol, uuid_t gfid,
char **path_p)
{
int ret = 0;
char *path = NULL;
loc_t loc = {0,};
dict_t *xattr = NULL;
gf_uuid_copy (loc.gfid, gfid);
loc.inode = inode_new (itable);
ret = syncop_getxattr (subvol, &loc, &xattr, GFID_TO_PATH_KEY, NULL,
NULL);
if (ret < 0)
goto out;
ret = dict_get_str (xattr, GFID_TO_PATH_KEY, &path);
if (ret || !path) {
ret = -EINVAL;
goto out;
}
if (path_p) {
*path_p = gf_strdup (path);
if (!*path_p) {
ret = -ENOMEM;
goto out;
}
}
ret = 0;
out:
if (xattr)
dict_unref (xattr);
loc_wipe (&loc);
return ret;
}
|
