[linux-2.6-block.git] / fs / btrfs / tests / extent-buffer-tests.c

/*
 * Copyright (C) 2013 Fusion IO.  All rights reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public
 * License v2 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public
 * License along with this program; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 021110-1307, USA.
 */

#include <linux/slab.h>
#include "btrfs-tests.h"
#include "../ctree.h"
#include "../extent_io.h"
#include "../disk-io.h"

static int test_btrfs_split_item(u32 sectorsize, u32 nodesize)
{
	struct btrfs_fs_info *fs_info;
	struct btrfs_path *path = NULL;
	struct btrfs_root *root = NULL;
	struct extent_buffer *eb;
	struct btrfs_item *item;
	char *value = "mary had a little lamb";
	char *split1 = "mary had a little";
	char *split2 = " lamb";
	char *split3 = "mary";
	char *split4 = " had a little";
	char buf[32];
	struct btrfs_key key;
	u32 value_len = strlen(value);
	int ret = 0;

	test_msg("Running btrfs_split_item tests\n");

	fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
	if (!fs_info) {
		test_msg("Could not allocate fs_info\n");
		return -ENOMEM;
	}

	root = btrfs_alloc_dummy_root(fs_info);
	if (IS_ERR(root)) {
		test_msg("Could not allocate root\n");
		ret = PTR_ERR(root);
		goto out;
	}

	path = btrfs_alloc_path();
	if (!path) {
		test_msg("Could not allocate path\n");
		ret = -ENOMEM;
		goto out;
	}

	path->nodes[0] = eb = alloc_dummy_extent_buffer(fs_info, nodesize);
	if (!eb) {
		test_msg("Could not allocate dummy buffer\n");
		ret = -ENOMEM;
		goto out;
	}
	path->slots[0] = 0;

	key.objectid = 0;
	key.type = BTRFS_EXTENT_CSUM_KEY;
	key.offset = 0;

	setup_items_for_insert(root, path, &key, &value_len, value_len,
			       value_len + sizeof(struct btrfs_item), 1);
	item = btrfs_item_nr(0);
	write_extent_buffer(eb, value, btrfs_item_ptr_offset(eb, 0),
			    value_len);

	key.offset = 3;

	/*
	 * Passing NULL trans here should be safe because we have plenty of
	 * space in this leaf to split the item without having to split the
	 * leaf.
	 */
	ret = btrfs_split_item(NULL, root, path, &key, 17);
	if (ret) {
		test_msg("Split item failed %d\n", ret);
		goto out;
	}

	/*
	 * Read the first slot, it should have the original key and contain only
	 * 'mary had a little'
	 */
	btrfs_item_key_to_cpu(eb, &key, 0);
	if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY ||
	    key.offset != 0) {
		test_msg("Invalid key at slot 0\n");
		ret = -EINVAL;
		goto out;
	}

	item = btrfs_item_nr(0);
	if (btrfs_item_size(eb, item) != strlen(split1)) {
		test_msg("Invalid len in the first split\n");
		ret = -EINVAL;
		goto out;
	}

	read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 0),
			   strlen(split1));
	if (memcmp(buf, split1, strlen(split1))) {
		test_msg("Data in the buffer doesn't match what it should "
			 "in the first split have='%.*s' want '%s'\n",
			 (int)strlen(split1), buf, split1);
		ret = -EINVAL;
		goto out;
	}

	btrfs_item_key_to_cpu(eb, &key, 1);
	if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY ||
	    key.offset != 3) {
		test_msg("Invalid key at slot 1\n");
		ret = -EINVAL;
		goto out;
	}

	item = btrfs_item_nr(1);
	if (btrfs_item_size(eb, item) != strlen(split2)) {
		test_msg("Invalid len in the second split\n");
		ret = -EINVAL;
		goto out;
	}

	read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 1),
			   strlen(split2));
	if (memcmp(buf, split2, strlen(split2))) {
		test_msg("Data in the buffer doesn't match what it should "
			 "in the second split\n");
		ret = -EINVAL;
		goto out;
	}

	key.offset = 1;
	/* Do it again so we test memmoving the other items in the leaf */
	ret = btrfs_split_item(NULL, root, path, &key, 4);
	if (ret) {
		test_msg("Second split item failed %d\n", ret);
		goto out;
	}

	btrfs_item_key_to_cpu(eb, &key, 0);
	if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY ||
	    key.offset != 0) {
		test_msg("Invalid key at slot 0\n");
		ret = -EINVAL;
		goto out;
	}

	item = btrfs_item_nr(0);
	if (btrfs_item_size(eb, item) != strlen(split3)) {
		test_msg("Invalid len in the first split\n");
		ret = -EINVAL;
		goto out;
	}

	read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 0),
			   strlen(split3));
	if (memcmp(buf, split3, strlen(split3))) {
		test_msg("Data in the buffer doesn't match what it should "
			 "in the third split");
		ret = -EINVAL;
		goto out;
	}

	btrfs_item_key_to_cpu(eb, &key, 1);
	if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY ||
	    key.offset != 1) {
		test_msg("Invalid key at slot 1\n");
		ret = -EINVAL;
		goto out;
	}

	item = btrfs_item_nr(1);
	if (btrfs_item_size(eb, item) != strlen(split4)) {
		test_msg("Invalid len in the second split\n");
		ret = -EINVAL;
		goto out;
	}

	read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 1),
			   strlen(split4));
	if (memcmp(buf, split4, strlen(split4))) {
		test_msg("Data in the buffer doesn't match what it should "
			 "in the fourth split\n");
		ret = -EINVAL;
		goto out;
	}

	btrfs_item_key_to_cpu(eb, &key, 2);
	if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY ||
	    key.offset != 3) {
		test_msg("Invalid key at slot 2\n");
		ret = -EINVAL;
		goto out;
	}

	item = btrfs_item_nr(2);
	if (btrfs_item_size(eb, item) != strlen(split2)) {
		test_msg("Invalid len in the second split\n");
		ret = -EINVAL;
		goto out;
	}

	read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 2),
			   strlen(split2));
	if (memcmp(buf, split2, strlen(split2))) {
		test_msg("Data in the buffer doesn't match what it should "
			 "in the last chunk\n");
		ret = -EINVAL;
		goto out;
	}
out:
	btrfs_free_path(path);
	btrfs_free_dummy_root(root);
	btrfs_free_dummy_fs_info(fs_info);
	return ret;
}

int btrfs_test_extent_buffer_operations(u32 sectorsize, u32 nodesize)
{
	test_msg("Running extent buffer operation tests\n");
	return test_btrfs_split_item(sectorsize, nodesize);
}
Commit	Line	Data
06ea65a3 JB	1	/*
	2	* Copyright (C) 2013 Fusion IO. All rights reserved.
	3	*
	4	* This program is free software; you can redistribute it and/or
	5	* modify it under the terms of the GNU General Public
	6	* License v2 as published by the Free Software Foundation.
	7	*
	8	* This program is distributed in the hope that it will be useful,
	9	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	10	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	11	* General Public License for more details.
	12	*
	13	* You should have received a copy of the GNU General Public
	14	* License along with this program; if not, write to the
	15	* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
	16	* Boston, MA 021110-1307, USA.
	17	*/
	18
	19	#include <linux/slab.h>
	20	#include "btrfs-tests.h"
	21	#include "../ctree.h"
	22	#include "../extent_io.h"
	23	#include "../disk-io.h"
	24
b9ef22de	25	static int test_btrfs_split_item(u32 sectorsize, u32 nodesize)
06ea65a3	26	{
7c0260ee JM	27	struct btrfs_fs_info *fs_info;
	28	struct btrfs_path *path = NULL;
	29	struct btrfs_root *root = NULL;
06ea65a3 JB	30	struct extent_buffer *eb;
	31	struct btrfs_item *item;
	32	char *value = "mary had a little lamb";
	33	char *split1 = "mary had a little";
	34	char *split2 = " lamb";
	35	char *split3 = "mary";
	36	char *split4 = " had a little";
	37	char buf[32];
	38	struct btrfs_key key;
	39	u32 value_len = strlen(value);
	40	int ret = 0;
	41
	42	test_msg("Running btrfs_split_item tests\n");
	43
da17066c	44	fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
7c0260ee JM	45	if (!fs_info) {
	46	test_msg("Could not allocate fs_info\n");
	47	return -ENOMEM;
	48	}
	49
da17066c	50	root = btrfs_alloc_dummy_root(fs_info);
06ea65a3 JB	51	if (IS_ERR(root)) {
06ea65a3 JB	52	test_msg("Could not allocate root\n");
7c0260ee JM	53	ret = PTR_ERR(root);
7c0260ee JM	54	goto out;
06ea65a3 JB	55	}
	56
	57	path = btrfs_alloc_path();
	58	if (!path) {
	59	test_msg("Could not allocate path\n");
7c0260ee JM	60	ret = -ENOMEM;
7c0260ee JM	61	goto out;
06ea65a3 JB	62	}
06ea65a3 JB	63
da17066c	64	path->nodes[0] = eb = alloc_dummy_extent_buffer(fs_info, nodesize);
06ea65a3 JB	65	if (!eb) {
	66	test_msg("Could not allocate dummy buffer\n");
	67	ret = -ENOMEM;
	68	goto out;
	69	}
	70	path->slots[0] = 0;
	71
	72	key.objectid = 0;
	73	key.type = BTRFS_EXTENT_CSUM_KEY;
	74	key.offset = 0;
	75
	76	setup_items_for_insert(root, path, &key, &value_len, value_len,
	77	value_len + sizeof(struct btrfs_item), 1);
	78	item = btrfs_item_nr(0);
	79	write_extent_buffer(eb, value, btrfs_item_ptr_offset(eb, 0),
	80	value_len);
	81
	82	key.offset = 3;
	83
	84	/*
	85	* Passing NULL trans here should be safe because we have plenty of
	86	* space in this leaf to split the item without having to split the
	87	* leaf.
	88	*/
	89	ret = btrfs_split_item(NULL, root, path, &key, 17);
	90	if (ret) {
	91	test_msg("Split item failed %d\n", ret);
	92	goto out;
	93	}
	94
	95	/*
	96	* Read the first slot, it should have the original key and contain only
	97	* 'mary had a little'
	98	*/
	99	btrfs_item_key_to_cpu(eb, &key, 0);
	100	if (key.objectid != 0 \|\| key.type != BTRFS_EXTENT_CSUM_KEY \|\|
	101	key.offset != 0) {
	102	test_msg("Invalid key at slot 0\n");
	103	ret = -EINVAL;
	104	goto out;
	105	}
	106
	107	item = btrfs_item_nr(0);
	108	if (btrfs_item_size(eb, item) != strlen(split1)) {
	109	test_msg("Invalid len in the first split\n");
	110	ret = -EINVAL;
	111	goto out;
	112	}
	113
	114	read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 0),
	115	strlen(split1));
	116	if (memcmp(buf, split1, strlen(split1))) {
	117	test_msg("Data in the buffer doesn't match what it should "
	118	"in the first split have='%.*s' want '%s'\n",
	119	(int)strlen(split1), buf, split1);
	120	ret = -EINVAL;
	121	goto out;
	122	}
	123
	124	btrfs_item_key_to_cpu(eb, &key, 1);
	125	if (key.objectid != 0 \|\| key.type != BTRFS_EXTENT_CSUM_KEY \|\|
	126	key.offset != 3) {
	127	test_msg("Invalid key at slot 1\n");
	128	ret = -EINVAL;
129	goto out;
130	}
131
132	item = btrfs_item_nr(1);
133	if (btrfs_item_size(eb, item) != strlen(split2)) {
134	test_msg("Invalid len in the second split\n");
135	ret = -EINVAL;
136	goto out;
137	}
138
139	read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 1),
140	strlen(split2));
141	if (memcmp(buf, split2, strlen(split2))) {
142	test_msg("Data in the buffer doesn't match what it should "
143	"in the second split\n");
144	ret = -EINVAL;
145	goto out;
146	}
147
148	key.offset = 1;
149	/* Do it again so we test memmoving the other items in the leaf */
150	ret = btrfs_split_item(NULL, root, path, &key, 4);
151	if (ret) {
152	test_msg("Second split item failed %d\n", ret);
153	goto out;
154	}
155
156	btrfs_item_key_to_cpu(eb, &key, 0);
157	if (key.objectid != 0 \|\| key.type != BTRFS_EXTENT_CSUM_KEY \|\|
158	key.offset != 0) {
159	test_msg("Invalid key at slot 0\n");
160	ret = -EINVAL;
161	goto out;
162	}
163
164	item = btrfs_item_nr(0);
165	if (btrfs_item_size(eb, item) != strlen(split3)) {
166	test_msg("Invalid len in the first split\n");
167	ret = -EINVAL;
168	goto out;
169	}
170
171	read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 0),
172	strlen(split3));
173	if (memcmp(buf, split3, strlen(split3))) {
174	test_msg("Data in the buffer doesn't match what it should "
175	"in the third split");
176	ret = -EINVAL;
177	goto out;
178	}
179
180	btrfs_item_key_to_cpu(eb, &key, 1);
181	if (key.objectid != 0 \|\| key.type != BTRFS_EXTENT_CSUM_KEY \|\|
182	key.offset != 1) {
183	test_msg("Invalid key at slot 1\n");
184	ret = -EINVAL;
185	goto out;
186	}
187
188	item = btrfs_item_nr(1);
189	if (btrfs_item_size(eb, item) != strlen(split4)) {
190	test_msg("Invalid len in the second split\n");
191	ret = -EINVAL;
192	goto out;
193	}
194
195	read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 1),
196	strlen(split4));
197	if (memcmp(buf, split4, strlen(split4))) {
198	test_msg("Data in the buffer doesn't match what it should "
199	"in the fourth split\n");
200	ret = -EINVAL;
201	goto out;
202	}
203
204	btrfs_item_key_to_cpu(eb, &key, 2);
205	if (key.objectid != 0 \|\| key.type != BTRFS_EXTENT_CSUM_KEY \|\|
206	key.offset != 3) {
207	test_msg("Invalid key at slot 2\n");
208	ret = -EINVAL;
209	goto out;
210	}
211
212	item = btrfs_item_nr(2);
213	if (btrfs_item_size(eb, item) != strlen(split2)) {
214	test_msg("Invalid len in the second split\n");
215	ret = -EINVAL;
216	goto out;
217	}
218
219	read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 2),
220	strlen(split2));
221	if (memcmp(buf, split2, strlen(split2))) {
222	test_msg("Data in the buffer doesn't match what it should "
223	"in the last chunk\n");
224	ret = -EINVAL;
225	goto out;
226	}
227	out:
228	btrfs_free_path(path);
7c0260ee JM	229	btrfs_free_dummy_root(root);
7c0260ee JM	230	btrfs_free_dummy_fs_info(fs_info);
06ea65a3 JB	231	return ret;
	232	}
	233
b9ef22de	234	int btrfs_test_extent_buffer_operations(u32 sectorsize, u32 nodesize)
06ea65a3	235	{
ef9f2db3	236	test_msg("Running extent buffer operation tests\n");
b9ef22de	237	return test_btrfs_split_item(sectorsize, nodesize);
06ea65a3	238	}