summaryrefslogtreecommitdiffstats
path: root/fs/btrfs/random-test.c
blob: f05135f13f9a0afc120755d209c20886fa35f3ed (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
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
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include "kerncompat.h"
#include "radix-tree.h"
#include "ctree.h"
#include "disk-io.h"
#include "print-tree.h"

int keep_running = 1;
struct btrfs_super_block super;

static int setup_key(struct radix_tree_root *root, struct btrfs_key *key,
		     int exists)
{
	int num = rand();
	unsigned long res[2];
	int ret;

	key->flags = 0;
	btrfs_set_key_type(key, BTRFS_STRING_ITEM_KEY);
	key->offset = 0;
again:
	ret = radix_tree_gang_lookup(root, (void **)res, num, 2);
	if (exists) {
		if (ret == 0)
			return -1;
		num = res[0];
	} else if (ret != 0 && num == res[0]) {
		num++;
		if (ret > 1 && num == res[1]) {
			num++;
			goto again;
		}
	}
	key->objectid = num;
	return 0;
}

static int ins_one(struct btrfs_root *root, struct radix_tree_root *radix)
{
	struct btrfs_path path;
	struct btrfs_key key;
	int ret;
	char buf[128];
	unsigned long oid;
	btrfs_init_path(&path);
	ret = setup_key(radix, &key, 0);
	sprintf(buf, "str-%Lu\n", key.objectid);
	ret = btrfs_insert_item(root, &key, buf, strlen(buf));
	if (ret)
		goto error;
	oid = (unsigned long)key.objectid;
	radix_tree_preload(GFP_KERNEL);
	ret = radix_tree_insert(radix, oid, (void *)oid);
	radix_tree_preload_end();
	if (ret)
		goto error;
	return ret;
error:
	printf("failed to insert %Lu\n", key.objectid);
	return -1;
}

static int insert_dup(struct btrfs_root *root, struct radix_tree_root *radix)
{
	struct btrfs_path path;
	struct btrfs_key key;
	int ret;
	char buf[128];
	btrfs_init_path(&path);
	ret = setup_key(radix, &key, 1);
	if (ret < 0)
		return 0;
	sprintf(buf, "str-%Lu\n", key.objectid);
	ret = btrfs_insert_item(root, &key, buf, strlen(buf));
	if (ret != -EEXIST) {
		printf("insert on %Lu gave us %d\n", key.objectid, ret);
		return 1;
	}
	return 0;
}

static int del_one(struct btrfs_root *root, struct radix_tree_root *radix)
{
	struct btrfs_path path;
	struct btrfs_key key;
	int ret;
	unsigned long *ptr;
	btrfs_init_path(&path);
	ret = setup_key(radix, &key, 1);
	if (ret < 0)
		return 0;
	ret = btrfs_search_slot(root, &key, &path, -1, 1);
	if (ret)
		goto error;
	ret = btrfs_del_item(root, &path);
	btrfs_release_path(root, &path);
	if (ret != 0)
		goto error;
	ptr = radix_tree_delete(radix, key.objectid);
	if (!ptr)
		goto error;
	return 0;
error:
	printf("failed to delete %Lu\n", key.objectid);
	return -1;
}

static int lookup_item(struct btrfs_root *root, struct radix_tree_root *radix)
{
	struct btrfs_path path;
	struct btrfs_key key;
	int ret;
	btrfs_init_path(&path);
	ret = setup_key(radix, &key, 1);
	if (ret < 0)
		return 0;
	ret = btrfs_search_slot(root, &key, &path, 0, 1);
	btrfs_release_path(root, &path);
	if (ret)
		goto error;
	return 0;
error:
	printf("unable to find key %Lu\n", key.objectid);
	return -1;
}

static int lookup_enoent(struct btrfs_root *root, struct radix_tree_root *radix)
{
	struct btrfs_path path;
	struct btrfs_key key;
	int ret;
	btrfs_init_path(&path);
	ret = setup_key(radix, &key, 0);
	if (ret < 0)
		return ret;
	ret = btrfs_search_slot(root, &key, &path, 0, 0);
	btrfs_release_path(root, &path);
	if (ret <= 0)
		goto error;
	return 0;
error:
	printf("able to find key that should not exist %Lu\n", key.objectid);
	return -1;
}

static int empty_tree(struct btrfs_root *root, struct radix_tree_root *radix,
		      int nr)
{
	struct btrfs_path path;
	struct btrfs_key key;
	unsigned long found = 0;
	int ret;
	int slot;
	int *ptr;
	int count = 0;

	key.offset = 0;
	key.flags = 0;
	btrfs_set_key_type(&key, BTRFS_STRING_ITEM_KEY);
	key.objectid = (unsigned long)-1;
	while(nr-- >= 0) {
		btrfs_init_path(&path);
		ret = btrfs_search_slot(root, &key, &path, -1, 1);
		if (ret < 0) {
			btrfs_release_path(root, &path);
			return ret;
		}
		if (ret != 0) {
			if (path.slots[0] == 0) {
				btrfs_release_path(root, &path);
				break;
			}
			path.slots[0] -= 1;
		}
		slot = path.slots[0];
		found = btrfs_disk_key_objectid(
					&path.nodes[0]->leaf.items[slot].key);
		ret = btrfs_del_item(root, &path);
		count++;
		if (ret) {
			fprintf(stderr,
				"failed to remove %lu from tree\n",
				found);
			return -1;
		}
		btrfs_release_path(root, &path);
		ptr = radix_tree_delete(radix, found);
		if (!ptr)
			goto error;
		if (!keep_running)
			break;
	}
	return 0;
error:
	fprintf(stderr, "failed to delete from the radix %lu\n", found);
	return -1;
}

static int fill_tree(struct btrfs_root *root, struct radix_tree_root *radix,
		     int count)
{
	int i;
	int ret = 0;
	for (i = 0; i < count; i++) {
		ret = ins_one(root, radix);
		if (ret) {
			fprintf(stderr, "fill failed\n");
			goto out;
		}
		if (i % 1000 == 0) {
			ret = btrfs_commit_transaction(root, &super);
			if (ret) {
				fprintf(stderr, "fill commit failed\n");
				return ret;
			}
		}
		if (i && i % 10000 == 0) {
			printf("bigfill %d\n", i);
		}
		if (!keep_running)
			break;
	}
out:
	return ret;
}

static int bulk_op(struct btrfs_root *root, struct radix_tree_root *radix)
{
	int ret;
	int nr = rand() % 5000;
	static int run_nr = 0;

	/* do the bulk op much less frequently */
	if (run_nr++ % 100)
		return 0;
	ret = empty_tree(root, radix, nr);
	if (ret)
		return ret;
	ret = fill_tree(root, radix, nr);
	if (ret)
		return ret;
	return 0;
}


int (*ops[])(struct btrfs_root *root, struct radix_tree_root *radix) =
	{ ins_one, insert_dup, del_one, lookup_item,
	  lookup_enoent, bulk_op };

static int fill_radix(struct btrfs_root *root, struct radix_tree_root *radix)
{
	struct btrfs_path path;
	struct btrfs_key key;
	unsigned long found;
	int ret;
	int slot;
	int i;

	key.offset = 0;
	key.flags = 0;
	btrfs_set_key_type(&key, BTRFS_STRING_ITEM_KEY);
	key.objectid = (unsigned long)-1;
	while(1) {
		btrfs_init_path(&path);
		ret = btrfs_search_slot(root, &key, &path, 0, 0);
		if (ret < 0) {
			btrfs_release_path(root, &path);
			return ret;
		}
		slot = path.slots[0];
		if (ret != 0) {
			if (slot == 0) {
				btrfs_release_path(root, &path);
				break;
			}
			slot -= 1;
		}
		for (i = slot; i >= 0; i--) {
			found = btrfs_disk_key_objectid(&path.nodes[0]->
							leaf.items[i].key);
			radix_tree_preload(GFP_KERNEL);
			ret = radix_tree_insert(radix, found, (void *)found);
			if (ret) {
				fprintf(stderr,
					"failed to insert %lu into radix\n",
					found);
				exit(1);
			}

			radix_tree_preload_end();
		}
		btrfs_release_path(root, &path);
		key.objectid = found - 1;
		if (key.objectid > found)
			break;
	}
	return 0;
}
void sigstopper(int ignored)
{
	keep_running = 0;
	fprintf(stderr, "caught exit signal, stopping\n");
}

int print_usage(void)
{
	printf("usage: tester [-ih] [-c count] [-f count]\n");
	printf("\t -c count -- iteration count after filling\n");
	printf("\t -f count -- run this many random inserts before starting\n");
	printf("\t -i       -- only do initial fill\n");
	printf("\t -h       -- this help text\n");
	exit(1);
}
int main(int ac, char **av)
{
	RADIX_TREE(radix, GFP_KERNEL);
	struct btrfs_root *root;
	int i;
	int ret;
	int count;
	int op;
	int iterations = 20000;
	int init_fill_count = 800000;
	int err = 0;
	int initial_only = 0;
	radix_tree_init();
	root = open_ctree("dbfile", &super);
	fill_radix(root, &radix);

	signal(SIGTERM, sigstopper);
	signal(SIGINT, sigstopper);

	for (i = 1 ; i < ac ; i++) {
		if (strcmp(av[i], "-i") == 0) {
			initial_only = 1;
		} else if (strcmp(av[i], "-c") == 0) {
			iterations = atoi(av[i+1]);
			i++;
		} else if (strcmp(av[i], "-f") == 0) {
			init_fill_count = atoi(av[i+1]);
			i++;
		} else {
			print_usage();
		}
	}
	printf("initial fill\n");
	ret = fill_tree(root, &radix, init_fill_count);
	printf("starting run\n");
	if (ret) {
		err = ret;
		goto out;
	}
	if (initial_only == 1) {
		goto out;
	}
	for (i = 0; i < iterations; i++) {
		op = rand() % ARRAY_SIZE(ops);
		count = rand() % 128;
		if (i % 2000 == 0) {
			printf("%d\n", i);
			fflush(stdout);
		}
		if (i && i % 5000 == 0) {
			printf("open & close, root level %d nritems %d\n",
				btrfs_header_level(&root->node->node.header),
				btrfs_header_nritems(&root->node->node.header));
			close_ctree(root, &super);
			root = open_ctree("dbfile", &super);
		}
		while(count--) {
			ret = ops[op](root, &radix);
			if (ret) {
				fprintf(stderr, "op %d failed %d:%d\n",
					op, i, iterations);
				btrfs_print_tree(root, root->node);
				fprintf(stderr, "op %d failed %d:%d\n",
					op, i, iterations);
				err = ret;
				goto out;
			}
			if (ops[op] == bulk_op)
				break;
			if (keep_running == 0) {
				err = 0;
				goto out;
			}
		}
	}
out:
	close_ctree(root, &super);
	return err;
}

OpenPOWER on IntegriCloud