[linux-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"
#include "../fs.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(&nop_mnt_idmap, 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);
	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 (IS_ERR_OR_NULL(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);
	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"
ec8eb376	19	#include "../fs.h"
294e30fe JB	20
	21	static struct vfsmount *test_mnt = NULL;
	22
703de426 DS	23	const char *test_error[] = {
	24	[TEST_ALLOC_FS_INFO] = "cannot allocate fs_info",
	25	[TEST_ALLOC_ROOT] = "cannot allocate root",
	26	[TEST_ALLOC_EXTENT_BUFFER] = "cannot extent buffer",
	27	[TEST_ALLOC_PATH] = "cannot allocate path",
	28	[TEST_ALLOC_INODE] = "cannot allocate inode",
	29	[TEST_ALLOC_BLOCK_GROUP] = "cannot allocate block group",
	30	[TEST_ALLOC_EXTENT_MAP] = "cannot allocate extent map",
	31	};
	32
aaedb55b JB	33	static const struct super_operations btrfs_test_super_ops = {
	34	.alloc_inode = btrfs_alloc_inode,
	35	.destroy_inode = btrfs_test_destroy_inode,
	36	};
	37
389e22fb DH	38
389e22fb DH	39	static int btrfs_test_init_fs_context(struct fs_context *fc)
294e30fe	40	{
389e22fb DH	41	struct pseudo_fs_context *ctx = init_pseudo(fc, BTRFS_TEST_MAGIC);
	42	if (!ctx)
	43	return -ENOMEM;
	44	ctx->ops = &btrfs_test_super_ops;
	45	return 0;
294e30fe JB	46	}
	47
	48	static struct file_system_type test_type = {
	49	.name = "btrfs_test_fs",
389e22fb	50	.init_fs_context = btrfs_test_init_fs_context,
294e30fe JB	51	.kill_sb = kill_anon_super,
	52	};
	53
	54	struct inode *btrfs_new_test_inode(void)
	55	{
9f7fec0b FM	56	struct inode *inode;
	57
	58	inode = new_inode(test_mnt->mnt_sb);
675a4fc8 JB	59	if (!inode)
	60	return NULL;
	61
	62	inode->i_mode = S_IFREG;
cf2404a9	63	inode->i_ino = BTRFS_FIRST_FREE_OBJECTID;
675a4fc8 JB	64	BTRFS_I(inode)->location.type = BTRFS_INODE_ITEM_KEY;
	65	BTRFS_I(inode)->location.objectid = BTRFS_FIRST_FREE_OBJECTID;
	66	BTRFS_I(inode)->location.offset = 0;
f2d40141	67	inode_init_owner(&nop_mnt_idmap, inode, NULL, S_IFREG);
9f7fec0b FM	68
9f7fec0b FM	69	return inode;
294e30fe JB	70	}
294e30fe JB	71
8632daae	72	static int btrfs_init_test_fs(void)
294e30fe JB	73	{
	74	int ret;
	75
	76	ret = register_filesystem(&test_type);
	77	if (ret) {
	78	printk(KERN_ERR "btrfs: cannot register test file system\n");
	79	return ret;
	80	}
	81
	82	test_mnt = kern_mount(&test_type);
	83	if (IS_ERR(test_mnt)) {
	84	printk(KERN_ERR "btrfs: cannot mount test file system\n");
	85	unregister_filesystem(&test_type);
04e1b65a	86	return PTR_ERR(test_mnt);
294e30fe JB	87	}
	88	return 0;
	89	}
	90
8632daae	91	static void btrfs_destroy_test_fs(void)
294e30fe JB	92	{
	93	kern_unmount(test_mnt);
	94	unregister_filesystem(&test_type);
	95	}
faa2dbf0	96
b3ad2c17 NB	97	struct btrfs_device btrfs_alloc_dummy_device(struct btrfs_fs_info fs_info)
	98	{
	99	struct btrfs_device *dev;
	100
	101	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
	102	if (!dev)
	103	return ERR_PTR(-ENOMEM);
	104
35da5a7e	105	extent_io_tree_init(NULL, &dev->alloc_state, 0);
b3ad2c17 NB	106	INIT_LIST_HEAD(&dev->dev_list);
	107	list_add(&dev->dev_list, &fs_info->fs_devices->devices);
	108
	109	return dev;
	110	}
	111
	112	static void btrfs_free_dummy_device(struct btrfs_device *dev)
	113	{
	114	extent_io_tree_release(&dev->alloc_state);
	115	kfree(dev);
	116	}
	117
da17066c	118	struct btrfs_fs_info *btrfs_alloc_dummy_fs_info(u32 nodesize, u32 sectorsize)
faa2dbf0 JB	119	{
faa2dbf0 JB	120	struct btrfs_fs_info *fs_info = kzalloc(sizeof(struct btrfs_fs_info),
8cce83ba	121	GFP_KERNEL);
faa2dbf0 JB	122
	123	if (!fs_info)
	124	return fs_info;
	125	fs_info->fs_devices = kzalloc(sizeof(struct btrfs_fs_devices),
8cce83ba	126	GFP_KERNEL);
faa2dbf0 JB	127	if (!fs_info->fs_devices) {
	128	kfree(fs_info);
	129	return NULL;
	130	}
8260edba JB	131	INIT_LIST_HEAD(&fs_info->fs_devices->devices);
8260edba JB	132
faa2dbf0	133	fs_info->super_copy = kzalloc(sizeof(struct btrfs_super_block),
8cce83ba	134	GFP_KERNEL);
faa2dbf0 JB	135	if (!fs_info->super_copy) {
	136	kfree(fs_info->fs_devices);
	137	kfree(fs_info);
	138	return NULL;
	139	}
	140
8260edba JB	141	btrfs_init_fs_info(fs_info);
8260edba JB	142
da17066c JM	143	fs_info->nodesize = nodesize;
da17066c JM	144	fs_info->sectorsize = sectorsize;
ab108d99	145	fs_info->sectorsize_bits = ilog2(sectorsize);
7c0260ee JM	146	set_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);
	147
	148	test_mnt->mnt_sb->s_fs_info = fs_info;
	149
faa2dbf0 JB	150	return fs_info;
	151	}
	152
7c0260ee	153	void btrfs_free_dummy_fs_info(struct btrfs_fs_info *fs_info)
faa2dbf0	154	{
01cd3909 DS	155	struct radix_tree_iter iter;
01cd3909 DS	156	void **slot;
b3ad2c17	157	struct btrfs_device dev, tmp;
faa2dbf0	158
7c0260ee JM	159	if (!fs_info)
	160	return;
	161
	162	if (WARN_ON(!test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO,
	163	&fs_info->fs_state)))
	164	return;
	165
	166	test_mnt->mnt_sb->s_fs_info = NULL;
	167
01cd3909 DS	168	spin_lock(&fs_info->buffer_lock);
	169	radix_tree_for_each_slot(slot, &fs_info->buffer_radix, &iter, 0) {
	170	struct extent_buffer *eb;
	171
	172	eb = radix_tree_deref_slot_protected(slot, &fs_info->buffer_lock);
	173	if (!eb)
	174	continue;
	175	/* Shouldn't happen but that kind of thinking creates CVE's */
	176	if (radix_tree_exception(eb)) {
	177	if (radix_tree_deref_retry(eb))
	178	slot = radix_tree_iter_retry(&iter);
	179	continue;
	180	}
	181	slot = radix_tree_iter_resume(slot, &iter);
	182	spin_unlock(&fs_info->buffer_lock);
faa2dbf0	183	free_extent_buffer_stale(eb);
01cd3909	184	spin_lock(&fs_info->buffer_lock);
faa2dbf0	185	}
01cd3909	186	spin_unlock(&fs_info->buffer_lock);
faa2dbf0	187
b3ad2c17 NB	188	btrfs_mapping_tree_free(&fs_info->mapping_tree);
	189	list_for_each_entry_safe(dev, tmp, &fs_info->fs_devices->devices,
	190	dev_list) {
	191	btrfs_free_dummy_device(dev);
	192	}
faa2dbf0 JB	193	btrfs_free_qgroup_config(fs_info);
faa2dbf0 JB	194	btrfs_free_fs_roots(fs_info);
faa2dbf0	195	kfree(fs_info->super_copy);
bd647ce3	196	btrfs_check_leaked_roots(fs_info);
8c38938c	197	btrfs_extent_buffer_leak_debug_check(fs_info);
faa2dbf0 JB	198	kfree(fs_info->fs_devices);
	199	kfree(fs_info);
	200	}
	201
	202	void btrfs_free_dummy_root(struct btrfs_root *root)
	203	{
9b2f2034	204	if (IS_ERR_OR_NULL(root))
faa2dbf0	205	return;
7c0260ee	206	/* Will be freed by btrfs_free_fs_roots */
fc7cbcd4	207	if (WARN_ON(test_bit(BTRFS_ROOT_IN_RADIX, &root->state)))
7c0260ee	208	return;
abed4aaa	209	btrfs_global_root_delete(root);
00246528	210	btrfs_put_root(root);
faa2dbf0 JB	211	}
faa2dbf0 JB	212
32da5386	213	struct btrfs_block_group *
da17066c JM	214	btrfs_alloc_dummy_block_group(struct btrfs_fs_info *fs_info,
da17066c JM	215	unsigned long length)
7c55ee0c	216	{
32da5386	217	struct btrfs_block_group *cache;
7c55ee0c	218
8cce83ba	219	cache = kzalloc(sizeof(*cache), GFP_KERNEL);
7c55ee0c OS	220	if (!cache)
	221	return NULL;
	222	cache->free_space_ctl = kzalloc(sizeof(*cache->free_space_ctl),
8cce83ba	223	GFP_KERNEL);
7c55ee0c OS	224	if (!cache->free_space_ctl) {
	225	kfree(cache);
	226	return NULL;
	227	}
	228
b3470b5d DS	229	cache->start = 0;
b3470b5d DS	230	cache->length = length;
da17066c JM	231	cache->full_stripe_len = fs_info->sectorsize;
da17066c JM	232	cache->fs_info = fs_info;
7c55ee0c OS	233
	234	INIT_LIST_HEAD(&cache->list);
	235	INIT_LIST_HEAD(&cache->cluster_list);
	236	INIT_LIST_HEAD(&cache->bg_list);
cd79909b	237	btrfs_init_free_space_ctl(cache, cache->free_space_ctl);
7c55ee0c OS	238	mutex_init(&cache->free_space_lock);
	239
	240	return cache;
	241	}
	242
32da5386	243	void btrfs_free_dummy_block_group(struct btrfs_block_group *cache)
7c55ee0c OS	244	{
	245	if (!cache)
	246	return;
fc80f7ac	247	btrfs_remove_free_space_cache(cache);
7c55ee0c OS	248	kfree(cache->free_space_ctl);
	249	kfree(cache);
	250	}
	251
483bce06 NB	252	void btrfs_init_dummy_trans(struct btrfs_trans_handle *trans,
483bce06 NB	253	struct btrfs_fs_info *fs_info)
7c55ee0c OS	254	{
	255	memset(trans, 0, sizeof(*trans));
	256	trans->transid = 1;
7c55ee0c	257	trans->type = __TRANS_DUMMY;
483bce06	258	trans->fs_info = fs_info;
7c55ee0c	259	}
8632daae JM	260
	261	int btrfs_run_sanity_tests(void)
	262	{
	263	int ret, i;
	264	u32 sectorsize, nodesize;
	265	u32 test_sectorsize[] = {
	266	PAGE_SIZE,
	267	};
	268	ret = btrfs_init_test_fs();
	269	if (ret)
	270	return ret;
	271	for (i = 0; i < ARRAY_SIZE(test_sectorsize); i++) {
	272	sectorsize = test_sectorsize[i];
	273	for (nodesize = sectorsize;
	274	nodesize <= BTRFS_MAX_METADATA_BLOCKSIZE;
	275	nodesize <<= 1) {
	276	pr_info("BTRFS: selftest: sectorsize: %u nodesize: %u\n",
	277	sectorsize, nodesize);
	278	ret = btrfs_test_free_space_cache(sectorsize, nodesize);
	279	if (ret)
	280	goto out;
	281	ret = btrfs_test_extent_buffer_operations(sectorsize,
	282	nodesize);
	283	if (ret)
	284	goto out;
	285	ret = btrfs_test_extent_io(sectorsize, nodesize);
	286	if (ret)
	287	goto out;
	288	ret = btrfs_test_inodes(sectorsize, nodesize);
	289	if (ret)
	290	goto out;
	291	ret = btrfs_test_qgroups(sectorsize, nodesize);
	292	if (ret)
	293	goto out;
	294	ret = btrfs_test_free_space_tree(sectorsize, nodesize);
	295	if (ret)
	296	goto out;
	297	}
	298	}
72b28077	299	ret = btrfs_test_extent_map();
7a61f880	300
8632daae JM	301	out:
	302	btrfs_destroy_test_fs();
	303	return ret;
	304	}