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

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (C) 2013 Fusion IO.  All rights reserved.
 */

#include <linux/fs.h>
#include <linux/mount.h>
#include <linux/pseudo_fs.h>
#include <linux/magic.h>
#include "btrfs-tests.h"
#include "../ctree.h"
#include "../free-space-cache.h"
#include "../free-space-tree.h"
#include "../transaction.h"
#include "../volumes.h"
#include "../disk-io.h"
#include "../qgroup.h"
#include "../block-group.h"

static struct vfsmount *test_mnt = NULL;

const char *test_error[] = {
	[TEST_ALLOC_FS_INFO]	     = "cannot allocate fs_info",
	[TEST_ALLOC_ROOT]	     = "cannot allocate root",
	[TEST_ALLOC_EXTENT_BUFFER]   = "cannot extent buffer",
	[TEST_ALLOC_PATH]	     = "cannot allocate path",
	[TEST_ALLOC_INODE]	     = "cannot allocate inode",
	[TEST_ALLOC_BLOCK_GROUP]     = "cannot allocate block group",
	[TEST_ALLOC_EXTENT_MAP]      = "cannot allocate extent map",
};

static const struct super_operations btrfs_test_super_ops = {
	.alloc_inode	= btrfs_alloc_inode,
	.destroy_inode	= btrfs_test_destroy_inode,
};


static int btrfs_test_init_fs_context(struct fs_context *fc)
{
	struct pseudo_fs_context *ctx = init_pseudo(fc, BTRFS_TEST_MAGIC);
	if (!ctx)
		return -ENOMEM;
	ctx->ops = &btrfs_test_super_ops;
	return 0;
}

static struct file_system_type test_type = {
	.name		= "btrfs_test_fs",
	.init_fs_context = btrfs_test_init_fs_context,
	.kill_sb	= kill_anon_super,
};

struct inode *btrfs_new_test_inode(void)
{
	struct inode *inode;

	inode = new_inode(test_mnt->mnt_sb);
	if (!inode)
		return NULL;

	inode->i_mode = S_IFREG;
	BTRFS_I(inode)->location.type = BTRFS_INODE_ITEM_KEY;
	BTRFS_I(inode)->location.objectid = BTRFS_FIRST_FREE_OBJECTID;
	BTRFS_I(inode)->location.offset = 0;
	inode_init_owner(&init_user_ns, inode, NULL, S_IFREG);

	return inode;
}

static int btrfs_init_test_fs(void)
{
	int ret;

	ret = register_filesystem(&test_type);
	if (ret) {
		printk(KERN_ERR "btrfs: cannot register test file system\n");
		return ret;
	}

	test_mnt = kern_mount(&test_type);
	if (IS_ERR(test_mnt)) {
		printk(KERN_ERR "btrfs: cannot mount test file system\n");
		unregister_filesystem(&test_type);
		return PTR_ERR(test_mnt);
	}
	return 0;
}

static void btrfs_destroy_test_fs(void)
{
	kern_unmount(test_mnt);
	unregister_filesystem(&test_type);
}

struct btrfs_device *btrfs_alloc_dummy_device(struct btrfs_fs_info *fs_info)
{
	struct btrfs_device *dev;

	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
	if (!dev)
		return ERR_PTR(-ENOMEM);

	extent_io_tree_init(NULL, &dev->alloc_state, 0, NULL);
	INIT_LIST_HEAD(&dev->dev_list);
	list_add(&dev->dev_list, &fs_info->fs_devices->devices);

	return dev;
}

static void btrfs_free_dummy_device(struct btrfs_device *dev)
{
	extent_io_tree_release(&dev->alloc_state);
	kfree(dev);
}

struct btrfs_fs_info *btrfs_alloc_dummy_fs_info(u32 nodesize, u32 sectorsize)
{
	struct btrfs_fs_info *fs_info = kzalloc(sizeof(struct btrfs_fs_info),
						GFP_KERNEL);

	if (!fs_info)
		return fs_info;
	fs_info->fs_devices = kzalloc(sizeof(struct btrfs_fs_devices),
				      GFP_KERNEL);
	if (!fs_info->fs_devices) {
		kfree(fs_info);
		return NULL;
	}
	INIT_LIST_HEAD(&fs_info->fs_devices->devices);

	fs_info->super_copy = kzalloc(sizeof(struct btrfs_super_block),
				      GFP_KERNEL);
	if (!fs_info->super_copy) {
		kfree(fs_info->fs_devices);
		kfree(fs_info);
		return NULL;
	}

	btrfs_init_fs_info(fs_info);

	fs_info->nodesize = nodesize;
	fs_info->sectorsize = sectorsize;
	fs_info->sectorsize_bits = ilog2(sectorsize);
	set_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);

	test_mnt->mnt_sb->s_fs_info = fs_info;

	return fs_info;
}

void btrfs_free_dummy_fs_info(struct btrfs_fs_info *fs_info)
{
	struct radix_tree_iter iter;
	void **slot;
	struct btrfs_device *dev, *tmp;

	if (!fs_info)
		return;

	if (WARN_ON(!test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO,
			      &fs_info->fs_state)))
		return;

	test_mnt->mnt_sb->s_fs_info = NULL;

	spin_lock(&fs_info->buffer_lock);
	radix_tree_for_each_slot(slot, &fs_info->buffer_radix, &iter, 0) {
		struct extent_buffer *eb;

		eb = radix_tree_deref_slot_protected(slot, &fs_info->buffer_lock);
		if (!eb)
			continue;
		/* Shouldn't happen but that kind of thinking creates CVE's */
		if (radix_tree_exception(eb)) {
			if (radix_tree_deref_retry(eb))
				slot = radix_tree_iter_retry(&iter);
			continue;
		}
		slot = radix_tree_iter_resume(slot, &iter);
		spin_unlock(&fs_info->buffer_lock);
		free_extent_buffer_stale(eb);
		spin_lock(&fs_info->buffer_lock);
	}
	spin_unlock(&fs_info->buffer_lock);

	btrfs_mapping_tree_free(&fs_info->mapping_tree);
	list_for_each_entry_safe(dev, tmp, &fs_info->fs_devices->devices,
				 dev_list) {
		btrfs_free_dummy_device(dev);
	}
	btrfs_free_qgroup_config(fs_info);
	btrfs_free_fs_roots(fs_info);
	kfree(fs_info->super_copy);
	btrfs_check_leaked_roots(fs_info);
	btrfs_extent_buffer_leak_debug_check(fs_info);
	kfree(fs_info->fs_devices);
	kfree(fs_info);
}

void btrfs_free_dummy_root(struct btrfs_root *root)
{
	if (!root)
		return;
	/* Will be freed by btrfs_free_fs_roots */
	if (WARN_ON(test_bit(BTRFS_ROOT_IN_RADIX, &root->state)))
		return;
	btrfs_global_root_delete(root);
	btrfs_put_root(root);
}

struct btrfs_block_group *
btrfs_alloc_dummy_block_group(struct btrfs_fs_info *fs_info,
			      unsigned long length)
{
	struct btrfs_block_group *cache;

	cache = kzalloc(sizeof(*cache), GFP_KERNEL);
	if (!cache)
		return NULL;
	cache->free_space_ctl = kzalloc(sizeof(*cache->free_space_ctl),
					GFP_KERNEL);
	if (!cache->free_space_ctl) {
		kfree(cache);
		return NULL;
	}

	cache->start = 0;
	cache->length = length;
	cache->full_stripe_len = fs_info->sectorsize;
	cache->fs_info = fs_info;

	INIT_LIST_HEAD(&cache->list);
	INIT_LIST_HEAD(&cache->cluster_list);
	INIT_LIST_HEAD(&cache->bg_list);
	btrfs_init_free_space_ctl(cache, cache->free_space_ctl);
	mutex_init(&cache->free_space_lock);

	return cache;
}

void btrfs_free_dummy_block_group(struct btrfs_block_group *cache)
{
	if (!cache)
		return;
	__btrfs_remove_free_space_cache(cache->free_space_ctl);
	kfree(cache->free_space_ctl);
	kfree(cache);
}

void btrfs_init_dummy_trans(struct btrfs_trans_handle *trans,
			    struct btrfs_fs_info *fs_info)
{
	memset(trans, 0, sizeof(*trans));
	trans->transid = 1;
	trans->type = __TRANS_DUMMY;
	trans->fs_info = fs_info;
}

int btrfs_run_sanity_tests(void)
{
	int ret, i;
	u32 sectorsize, nodesize;
	u32 test_sectorsize[] = {
		PAGE_SIZE,
	};
	ret = btrfs_init_test_fs();
	if (ret)
		return ret;
	for (i = 0; i < ARRAY_SIZE(test_sectorsize); i++) {
		sectorsize = test_sectorsize[i];
		for (nodesize = sectorsize;
		     nodesize <= BTRFS_MAX_METADATA_BLOCKSIZE;
		     nodesize <<= 1) {
			pr_info("BTRFS: selftest: sectorsize: %u  nodesize: %u\n",
				sectorsize, nodesize);
			ret = btrfs_test_free_space_cache(sectorsize, nodesize);
			if (ret)
				goto out;
			ret = btrfs_test_extent_buffer_operations(sectorsize,
				nodesize);
			if (ret)
				goto out;
			ret = btrfs_test_extent_io(sectorsize, nodesize);
			if (ret)
				goto out;
			ret = btrfs_test_inodes(sectorsize, nodesize);
			if (ret)
				goto out;
			ret = btrfs_test_qgroups(sectorsize, nodesize);
			if (ret)
				goto out;
			ret = btrfs_test_free_space_tree(sectorsize, nodesize);
			if (ret)
				goto out;
		}
	}
	ret = btrfs_test_extent_map();

out:
	btrfs_destroy_test_fs();
	return ret;
}
Commit	Line	Data
c1d7c514	1	// SPDX-License-Identifier: GPL-2.0
294e30fe JB	2	/*
294e30fe JB	3	* Copyright (C) 2013 Fusion IO. All rights reserved.
294e30fe JB	4	*/
	5
	6	#include <linux/fs.h>
	7	#include <linux/mount.h>
389e22fb	8	#include <linux/pseudo_fs.h>
294e30fe JB	9	#include <linux/magic.h>
	10	#include "btrfs-tests.h"
	11	#include "../ctree.h"
7c55ee0c OS	12	#include "../free-space-cache.h"
	13	#include "../free-space-tree.h"
	14	#include "../transaction.h"
faa2dbf0 JB	15	#include "../volumes.h"
	16	#include "../disk-io.h"
	17	#include "../qgroup.h"
aac0023c	18	#include "../block-group.h"
294e30fe JB	19
	20	static struct vfsmount *test_mnt = NULL;
	21
703de426 DS	22	const char *test_error[] = {
	23	[TEST_ALLOC_FS_INFO] = "cannot allocate fs_info",
	24	[TEST_ALLOC_ROOT] = "cannot allocate root",
	25	[TEST_ALLOC_EXTENT_BUFFER] = "cannot extent buffer",
	26	[TEST_ALLOC_PATH] = "cannot allocate path",
	27	[TEST_ALLOC_INODE] = "cannot allocate inode",
	28	[TEST_ALLOC_BLOCK_GROUP] = "cannot allocate block group",
	29	[TEST_ALLOC_EXTENT_MAP] = "cannot allocate extent map",
	30	};
	31
aaedb55b JB	32	static const struct super_operations btrfs_test_super_ops = {
	33	.alloc_inode = btrfs_alloc_inode,
	34	.destroy_inode = btrfs_test_destroy_inode,
	35	};
	36
389e22fb DH	37
389e22fb DH	38	static int btrfs_test_init_fs_context(struct fs_context *fc)
294e30fe	39	{
389e22fb DH	40	struct pseudo_fs_context *ctx = init_pseudo(fc, BTRFS_TEST_MAGIC);
	41	if (!ctx)
	42	return -ENOMEM;
	43	ctx->ops = &btrfs_test_super_ops;
	44	return 0;
294e30fe JB	45	}
	46
	47	static struct file_system_type test_type = {
	48	.name = "btrfs_test_fs",
389e22fb	49	.init_fs_context = btrfs_test_init_fs_context,
294e30fe JB	50	.kill_sb = kill_anon_super,
	51	};
	52
	53	struct inode *btrfs_new_test_inode(void)
	54	{
9f7fec0b FM	55	struct inode *inode;
	56
	57	inode = new_inode(test_mnt->mnt_sb);
675a4fc8 JB	58	if (!inode)
	59	return NULL;
	60
	61	inode->i_mode = S_IFREG;
	62	BTRFS_I(inode)->location.type = BTRFS_INODE_ITEM_KEY;
	63	BTRFS_I(inode)->location.objectid = BTRFS_FIRST_FREE_OBJECTID;
	64	BTRFS_I(inode)->location.offset = 0;
21cb47be	65	inode_init_owner(&init_user_ns, inode, NULL, S_IFREG);
9f7fec0b FM	66
9f7fec0b FM	67	return inode;
294e30fe JB	68	}
294e30fe JB	69
8632daae	70	static int btrfs_init_test_fs(void)
294e30fe JB	71	{
	72	int ret;
	73
	74	ret = register_filesystem(&test_type);
	75	if (ret) {
	76	printk(KERN_ERR "btrfs: cannot register test file system\n");
	77	return ret;
	78	}
	79
	80	test_mnt = kern_mount(&test_type);
	81	if (IS_ERR(test_mnt)) {
	82	printk(KERN_ERR "btrfs: cannot mount test file system\n");
	83	unregister_filesystem(&test_type);
04e1b65a	84	return PTR_ERR(test_mnt);
294e30fe JB	85	}
	86	return 0;
	87	}
	88
8632daae	89	static void btrfs_destroy_test_fs(void)
294e30fe JB	90	{
	91	kern_unmount(test_mnt);
	92	unregister_filesystem(&test_type);
	93	}
faa2dbf0	94
b3ad2c17 NB	95	struct btrfs_device btrfs_alloc_dummy_device(struct btrfs_fs_info fs_info)
	96	{
	97	struct btrfs_device *dev;
	98
	99	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
	100	if (!dev)
	101	return ERR_PTR(-ENOMEM);
	102
	103	extent_io_tree_init(NULL, &dev->alloc_state, 0, NULL);
	104	INIT_LIST_HEAD(&dev->dev_list);
	105	list_add(&dev->dev_list, &fs_info->fs_devices->devices);
	106
	107	return dev;
	108	}
	109
	110	static void btrfs_free_dummy_device(struct btrfs_device *dev)
	111	{
	112	extent_io_tree_release(&dev->alloc_state);
	113	kfree(dev);
	114	}
	115
da17066c	116	struct btrfs_fs_info *btrfs_alloc_dummy_fs_info(u32 nodesize, u32 sectorsize)
faa2dbf0 JB	117	{
faa2dbf0 JB	118	struct btrfs_fs_info *fs_info = kzalloc(sizeof(struct btrfs_fs_info),
8cce83ba	119	GFP_KERNEL);
faa2dbf0 JB	120
	121	if (!fs_info)
	122	return fs_info;
	123	fs_info->fs_devices = kzalloc(sizeof(struct btrfs_fs_devices),
8cce83ba	124	GFP_KERNEL);
faa2dbf0 JB	125	if (!fs_info->fs_devices) {
	126	kfree(fs_info);
	127	return NULL;
	128	}
8260edba JB	129	INIT_LIST_HEAD(&fs_info->fs_devices->devices);
8260edba JB	130
faa2dbf0	131	fs_info->super_copy = kzalloc(sizeof(struct btrfs_super_block),
8cce83ba	132	GFP_KERNEL);
faa2dbf0 JB	133	if (!fs_info->super_copy) {
	134	kfree(fs_info->fs_devices);
	135	kfree(fs_info);
	136	return NULL;
	137	}
	138
8260edba JB	139	btrfs_init_fs_info(fs_info);
8260edba JB	140
da17066c JM	141	fs_info->nodesize = nodesize;
da17066c JM	142	fs_info->sectorsize = sectorsize;
ab108d99	143	fs_info->sectorsize_bits = ilog2(sectorsize);
7c0260ee JM	144	set_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);
	145
	146	test_mnt->mnt_sb->s_fs_info = fs_info;
	147
faa2dbf0 JB	148	return fs_info;
	149	}
	150
7c0260ee	151	void btrfs_free_dummy_fs_info(struct btrfs_fs_info *fs_info)
faa2dbf0	152	{
01cd3909 DS	153	struct radix_tree_iter iter;
01cd3909 DS	154	void **slot;
b3ad2c17	155	struct btrfs_device dev, tmp;
faa2dbf0	156
7c0260ee JM	157	if (!fs_info)
	158	return;
	159
	160	if (WARN_ON(!test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO,
	161	&fs_info->fs_state)))
	162	return;
	163
	164	test_mnt->mnt_sb->s_fs_info = NULL;
	165
01cd3909 DS	166	spin_lock(&fs_info->buffer_lock);
	167	radix_tree_for_each_slot(slot, &fs_info->buffer_radix, &iter, 0) {
	168	struct extent_buffer *eb;
	169
	170	eb = radix_tree_deref_slot_protected(slot, &fs_info->buffer_lock);
	171	if (!eb)
	172	continue;
	173	/* Shouldn't happen but that kind of thinking creates CVE's */
	174	if (radix_tree_exception(eb)) {
	175	if (radix_tree_deref_retry(eb))
	176	slot = radix_tree_iter_retry(&iter);
	177	continue;
	178	}
	179	slot = radix_tree_iter_resume(slot, &iter);
	180	spin_unlock(&fs_info->buffer_lock);
faa2dbf0	181	free_extent_buffer_stale(eb);
01cd3909	182	spin_lock(&fs_info->buffer_lock);
faa2dbf0	183	}
01cd3909	184	spin_unlock(&fs_info->buffer_lock);
faa2dbf0	185
b3ad2c17 NB	186	btrfs_mapping_tree_free(&fs_info->mapping_tree);
	187	list_for_each_entry_safe(dev, tmp, &fs_info->fs_devices->devices,
	188	dev_list) {
	189	btrfs_free_dummy_device(dev);
	190	}
faa2dbf0 JB	191	btrfs_free_qgroup_config(fs_info);
faa2dbf0 JB	192	btrfs_free_fs_roots(fs_info);
faa2dbf0	193	kfree(fs_info->super_copy);
bd647ce3	194	btrfs_check_leaked_roots(fs_info);
8c38938c	195	btrfs_extent_buffer_leak_debug_check(fs_info);
faa2dbf0 JB	196	kfree(fs_info->fs_devices);
	197	kfree(fs_info);
	198	}
	199
	200	void btrfs_free_dummy_root(struct btrfs_root *root)
	201	{
	202	if (!root)
	203	return;
7c0260ee	204	/* Will be freed by btrfs_free_fs_roots */
fc7cbcd4	205	if (WARN_ON(test_bit(BTRFS_ROOT_IN_RADIX, &root->state)))
7c0260ee	206	return;
abed4aaa	207	btrfs_global_root_delete(root);
00246528	208	btrfs_put_root(root);
faa2dbf0 JB	209	}
faa2dbf0 JB	210
32da5386	211	struct btrfs_block_group *
da17066c JM	212	btrfs_alloc_dummy_block_group(struct btrfs_fs_info *fs_info,
da17066c JM	213	unsigned long length)
7c55ee0c	214	{
32da5386	215	struct btrfs_block_group *cache;
7c55ee0c	216
8cce83ba	217	cache = kzalloc(sizeof(*cache), GFP_KERNEL);
7c55ee0c OS	218	if (!cache)
	219	return NULL;
	220	cache->free_space_ctl = kzalloc(sizeof(*cache->free_space_ctl),
8cce83ba	221	GFP_KERNEL);
7c55ee0c OS	222	if (!cache->free_space_ctl) {
	223	kfree(cache);
	224	return NULL;
	225	}
	226
b3470b5d DS	227	cache->start = 0;
b3470b5d DS	228	cache->length = length;
da17066c JM	229	cache->full_stripe_len = fs_info->sectorsize;
da17066c JM	230	cache->fs_info = fs_info;
7c55ee0c OS	231
	232	INIT_LIST_HEAD(&cache->list);
	233	INIT_LIST_HEAD(&cache->cluster_list);
	234	INIT_LIST_HEAD(&cache->bg_list);
cd79909b	235	btrfs_init_free_space_ctl(cache, cache->free_space_ctl);
7c55ee0c OS	236	mutex_init(&cache->free_space_lock);
	237
	238	return cache;
	239	}
	240
32da5386	241	void btrfs_free_dummy_block_group(struct btrfs_block_group *cache)
7c55ee0c OS	242	{
	243	if (!cache)
	244	return;
	245	__btrfs_remove_free_space_cache(cache->free_space_ctl);
	246	kfree(cache->free_space_ctl);
	247	kfree(cache);
	248	}
	249
483bce06 NB	250	void btrfs_init_dummy_trans(struct btrfs_trans_handle *trans,
483bce06 NB	251	struct btrfs_fs_info *fs_info)
7c55ee0c OS	252	{
	253	memset(trans, 0, sizeof(*trans));
	254	trans->transid = 1;
7c55ee0c	255	trans->type = __TRANS_DUMMY;
483bce06	256	trans->fs_info = fs_info;
7c55ee0c	257	}
8632daae JM	258
	259	int btrfs_run_sanity_tests(void)
	260	{
	261	int ret, i;
	262	u32 sectorsize, nodesize;
	263	u32 test_sectorsize[] = {
	264	PAGE_SIZE,
	265	};
	266	ret = btrfs_init_test_fs();
	267	if (ret)
	268	return ret;
	269	for (i = 0; i < ARRAY_SIZE(test_sectorsize); i++) {
	270	sectorsize = test_sectorsize[i];
	271	for (nodesize = sectorsize;
	272	nodesize <= BTRFS_MAX_METADATA_BLOCKSIZE;
	273	nodesize <<= 1) {
	274	pr_info("BTRFS: selftest: sectorsize: %u nodesize: %u\n",
	275	sectorsize, nodesize);
	276	ret = btrfs_test_free_space_cache(sectorsize, nodesize);
	277	if (ret)
	278	goto out;
	279	ret = btrfs_test_extent_buffer_operations(sectorsize,
	280	nodesize);
	281	if (ret)
	282	goto out;
	283	ret = btrfs_test_extent_io(sectorsize, nodesize);
	284	if (ret)
	285	goto out;
	286	ret = btrfs_test_inodes(sectorsize, nodesize);
	287	if (ret)
	288	goto out;
	289	ret = btrfs_test_qgroups(sectorsize, nodesize);
	290	if (ret)
	291	goto out;
	292	ret = btrfs_test_free_space_tree(sectorsize, nodesize);
	293	if (ret)
	294	goto out;
	295	}
	296	}
72b28077	297	ret = btrfs_test_extent_map();
7a61f880	298
8632daae JM	299	out:
	300	btrfs_destroy_test_fs();
	301	return ret;
	302	}