[people/ms/linux.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;
	inode->i_ino = BTRFS_FIRST_FREE_OBJECTID;
	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;
cf2404a9	62	inode->i_ino = BTRFS_FIRST_FREE_OBJECTID;
675a4fc8 JB	63	BTRFS_I(inode)->location.type = BTRFS_INODE_ITEM_KEY;
	64	BTRFS_I(inode)->location.objectid = BTRFS_FIRST_FREE_OBJECTID;
	65	BTRFS_I(inode)->location.offset = 0;
21cb47be	66	inode_init_owner(&init_user_ns, inode, NULL, S_IFREG);
9f7fec0b FM	67
9f7fec0b FM	68	return inode;
294e30fe JB	69	}
294e30fe JB	70
8632daae	71	static int btrfs_init_test_fs(void)
294e30fe JB	72	{
	73	int ret;
	74
	75	ret = register_filesystem(&test_type);
	76	if (ret) {
	77	printk(KERN_ERR "btrfs: cannot register test file system\n");
	78	return ret;
	79	}
	80
	81	test_mnt = kern_mount(&test_type);
	82	if (IS_ERR(test_mnt)) {
	83	printk(KERN_ERR "btrfs: cannot mount test file system\n");
	84	unregister_filesystem(&test_type);
04e1b65a	85	return PTR_ERR(test_mnt);
294e30fe JB	86	}
	87	return 0;
	88	}
	89
8632daae	90	static void btrfs_destroy_test_fs(void)
294e30fe JB	91	{
	92	kern_unmount(test_mnt);
	93	unregister_filesystem(&test_type);
	94	}
faa2dbf0	95
b3ad2c17 NB	96	struct btrfs_device btrfs_alloc_dummy_device(struct btrfs_fs_info fs_info)
	97	{
	98	struct btrfs_device *dev;
	99
	100	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
	101	if (!dev)
	102	return ERR_PTR(-ENOMEM);
	103
	104	extent_io_tree_init(NULL, &dev->alloc_state, 0, NULL);
	105	INIT_LIST_HEAD(&dev->dev_list);
	106	list_add(&dev->dev_list, &fs_info->fs_devices->devices);
	107
	108	return dev;
	109	}
	110
	111	static void btrfs_free_dummy_device(struct btrfs_device *dev)
	112	{
	113	extent_io_tree_release(&dev->alloc_state);
	114	kfree(dev);
	115	}
	116
da17066c	117	struct btrfs_fs_info *btrfs_alloc_dummy_fs_info(u32 nodesize, u32 sectorsize)
faa2dbf0 JB	118	{
faa2dbf0 JB	119	struct btrfs_fs_info *fs_info = kzalloc(sizeof(struct btrfs_fs_info),
8cce83ba	120	GFP_KERNEL);
faa2dbf0 JB	121
	122	if (!fs_info)
	123	return fs_info;
	124	fs_info->fs_devices = kzalloc(sizeof(struct btrfs_fs_devices),
8cce83ba	125	GFP_KERNEL);
faa2dbf0 JB	126	if (!fs_info->fs_devices) {
	127	kfree(fs_info);
	128	return NULL;
	129	}
8260edba JB	130	INIT_LIST_HEAD(&fs_info->fs_devices->devices);
8260edba JB	131
faa2dbf0	132	fs_info->super_copy = kzalloc(sizeof(struct btrfs_super_block),
8cce83ba	133	GFP_KERNEL);
faa2dbf0 JB	134	if (!fs_info->super_copy) {
	135	kfree(fs_info->fs_devices);
	136	kfree(fs_info);
	137	return NULL;
	138	}
	139
8260edba JB	140	btrfs_init_fs_info(fs_info);
8260edba JB	141
da17066c JM	142	fs_info->nodesize = nodesize;
da17066c JM	143	fs_info->sectorsize = sectorsize;
ab108d99	144	fs_info->sectorsize_bits = ilog2(sectorsize);
7c0260ee JM	145	set_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);
	146
	147	test_mnt->mnt_sb->s_fs_info = fs_info;
	148
faa2dbf0 JB	149	return fs_info;
	150	}
	151
7c0260ee	152	void btrfs_free_dummy_fs_info(struct btrfs_fs_info *fs_info)
faa2dbf0	153	{
01cd3909 DS	154	struct radix_tree_iter iter;
01cd3909 DS	155	void **slot;
b3ad2c17	156	struct btrfs_device dev, tmp;
faa2dbf0	157
7c0260ee JM	158	if (!fs_info)
	159	return;
	160
	161	if (WARN_ON(!test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO,
	162	&fs_info->fs_state)))
	163	return;
	164
	165	test_mnt->mnt_sb->s_fs_info = NULL;
	166
01cd3909 DS	167	spin_lock(&fs_info->buffer_lock);
	168	radix_tree_for_each_slot(slot, &fs_info->buffer_radix, &iter, 0) {
	169	struct extent_buffer *eb;
	170
	171	eb = radix_tree_deref_slot_protected(slot, &fs_info->buffer_lock);
	172	if (!eb)
	173	continue;
	174	/* Shouldn't happen but that kind of thinking creates CVE's */
	175	if (radix_tree_exception(eb)) {
	176	if (radix_tree_deref_retry(eb))
	177	slot = radix_tree_iter_retry(&iter);
	178	continue;
	179	}
	180	slot = radix_tree_iter_resume(slot, &iter);
	181	spin_unlock(&fs_info->buffer_lock);
faa2dbf0	182	free_extent_buffer_stale(eb);
01cd3909	183	spin_lock(&fs_info->buffer_lock);
faa2dbf0	184	}
01cd3909	185	spin_unlock(&fs_info->buffer_lock);
faa2dbf0	186
b3ad2c17 NB	187	btrfs_mapping_tree_free(&fs_info->mapping_tree);
	188	list_for_each_entry_safe(dev, tmp, &fs_info->fs_devices->devices,
	189	dev_list) {
	190	btrfs_free_dummy_device(dev);
	191	}
faa2dbf0 JB	192	btrfs_free_qgroup_config(fs_info);
faa2dbf0 JB	193	btrfs_free_fs_roots(fs_info);
faa2dbf0	194	kfree(fs_info->super_copy);
bd647ce3	195	btrfs_check_leaked_roots(fs_info);
8c38938c	196	btrfs_extent_buffer_leak_debug_check(fs_info);
faa2dbf0 JB	197	kfree(fs_info->fs_devices);
	198	kfree(fs_info);
	199	}
	200
	201	void btrfs_free_dummy_root(struct btrfs_root *root)
	202	{
	203	if (!root)
	204	return;
7c0260ee	205	/* Will be freed by btrfs_free_fs_roots */
fc7cbcd4	206	if (WARN_ON(test_bit(BTRFS_ROOT_IN_RADIX, &root->state)))
7c0260ee	207	return;
abed4aaa	208	btrfs_global_root_delete(root);
00246528	209	btrfs_put_root(root);
faa2dbf0 JB	210	}
faa2dbf0 JB	211
32da5386	212	struct btrfs_block_group *
da17066c JM	213	btrfs_alloc_dummy_block_group(struct btrfs_fs_info *fs_info,
da17066c JM	214	unsigned long length)
7c55ee0c	215	{
32da5386	216	struct btrfs_block_group *cache;
7c55ee0c	217
8cce83ba	218	cache = kzalloc(sizeof(*cache), GFP_KERNEL);
7c55ee0c OS	219	if (!cache)
	220	return NULL;
	221	cache->free_space_ctl = kzalloc(sizeof(*cache->free_space_ctl),
8cce83ba	222	GFP_KERNEL);
7c55ee0c OS	223	if (!cache->free_space_ctl) {
	224	kfree(cache);
	225	return NULL;
	226	}
	227
b3470b5d DS	228	cache->start = 0;
b3470b5d DS	229	cache->length = length;
da17066c JM	230	cache->full_stripe_len = fs_info->sectorsize;
da17066c JM	231	cache->fs_info = fs_info;
7c55ee0c OS	232
	233	INIT_LIST_HEAD(&cache->list);
	234	INIT_LIST_HEAD(&cache->cluster_list);
	235	INIT_LIST_HEAD(&cache->bg_list);
cd79909b	236	btrfs_init_free_space_ctl(cache, cache->free_space_ctl);
7c55ee0c OS	237	mutex_init(&cache->free_space_lock);
	238
	239	return cache;
	240	}
	241
32da5386	242	void btrfs_free_dummy_block_group(struct btrfs_block_group *cache)
7c55ee0c OS	243	{
	244	if (!cache)
	245	return;
	246	__btrfs_remove_free_space_cache(cache->free_space_ctl);
	247	kfree(cache->free_space_ctl);
	248	kfree(cache);
	249	}
	250
483bce06 NB	251	void btrfs_init_dummy_trans(struct btrfs_trans_handle *trans,
483bce06 NB	252	struct btrfs_fs_info *fs_info)
7c55ee0c OS	253	{
	254	memset(trans, 0, sizeof(*trans));
	255	trans->transid = 1;
7c55ee0c	256	trans->type = __TRANS_DUMMY;
483bce06	257	trans->fs_info = fs_info;
7c55ee0c	258	}
8632daae JM	259
	260	int btrfs_run_sanity_tests(void)
	261	{
	262	int ret, i;
	263	u32 sectorsize, nodesize;
	264	u32 test_sectorsize[] = {
	265	PAGE_SIZE,
	266	};
	267	ret = btrfs_init_test_fs();
	268	if (ret)
	269	return ret;
	270	for (i = 0; i < ARRAY_SIZE(test_sectorsize); i++) {
	271	sectorsize = test_sectorsize[i];
	272	for (nodesize = sectorsize;
	273	nodesize <= BTRFS_MAX_METADATA_BLOCKSIZE;
	274	nodesize <<= 1) {
	275	pr_info("BTRFS: selftest: sectorsize: %u nodesize: %u\n",
	276	sectorsize, nodesize);
	277	ret = btrfs_test_free_space_cache(sectorsize, nodesize);
	278	if (ret)
	279	goto out;
	280	ret = btrfs_test_extent_buffer_operations(sectorsize,
	281	nodesize);
	282	if (ret)
	283	goto out;
	284	ret = btrfs_test_extent_io(sectorsize, nodesize);
	285	if (ret)
	286	goto out;
	287	ret = btrfs_test_inodes(sectorsize, nodesize);
	288	if (ret)
	289	goto out;
	290	ret = btrfs_test_qgroups(sectorsize, nodesize);
	291	if (ret)
	292	goto out;
	293	ret = btrfs_test_free_space_tree(sectorsize, nodesize);
	294	if (ret)
	295	goto out;
	296	}
	297	}
72b28077	298	ret = btrfs_test_extent_map();
7a61f880	299
8632daae JM	300	out:
	301	btrfs_destroy_test_fs();
	302	return ret;
	303	}