[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)
		inode_init_owner(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_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;
	}
	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;
	}

	fs_info->nodesize = nodesize;
	fs_info->sectorsize = sectorsize;

	if (init_srcu_struct(&fs_info->subvol_srcu)) {
		kfree(fs_info->fs_devices);
		kfree(fs_info->super_copy);
		kfree(fs_info);
		return NULL;
	}

	spin_lock_init(&fs_info->buffer_lock);
	spin_lock_init(&fs_info->qgroup_lock);
	spin_lock_init(&fs_info->super_lock);
	spin_lock_init(&fs_info->fs_roots_radix_lock);
	spin_lock_init(&fs_info->tree_mod_seq_lock);
	mutex_init(&fs_info->qgroup_ioctl_lock);
	mutex_init(&fs_info->qgroup_rescan_lock);
	rwlock_init(&fs_info->tree_mod_log_lock);
	fs_info->running_transaction = NULL;
	fs_info->qgroup_tree = RB_ROOT;
	fs_info->qgroup_ulist = NULL;
	atomic64_set(&fs_info->tree_mod_seq, 0);
	INIT_LIST_HEAD(&fs_info->dirty_qgroups);
	INIT_LIST_HEAD(&fs_info->dead_roots);
	INIT_LIST_HEAD(&fs_info->tree_mod_seq_list);
	INIT_RADIX_TREE(&fs_info->buffer_radix, GFP_ATOMIC);
	INIT_RADIX_TREE(&fs_info->fs_roots_radix, GFP_ATOMIC);
	extent_io_tree_init(fs_info, &fs_info->freed_extents[0],
			    IO_TREE_FS_INFO_FREED_EXTENTS0, NULL);
	extent_io_tree_init(fs_info, &fs_info->freed_extents[1],
			    IO_TREE_FS_INFO_FREED_EXTENTS1, NULL);
	fs_info->pinned_extents = &fs_info->freed_extents[0];
	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;

	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_free_qgroup_config(fs_info);
	btrfs_free_fs_roots(fs_info);
	cleanup_srcu_struct(&fs_info->subvol_srcu);
	kfree(fs_info->super_copy);
	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;
	if (root->node) {
		/* One for allocate_extent_buffer */
		free_extent_buffer(root->node);
	}
	kfree(root);
}

struct btrfs_block_group_cache *
btrfs_alloc_dummy_block_group(struct btrfs_fs_info *fs_info,
			      unsigned long length)
{
	struct btrfs_block_group_cache *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);
	mutex_init(&cache->free_space_lock);

	return cache;
}

void btrfs_free_dummy_block_group(struct btrfs_block_group_cache *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);
	58	if (inode)
	59	inode_init_owner(inode, NULL, S_IFREG);
	60
	61	return inode;
294e30fe JB	62	}
294e30fe JB	63
8632daae	64	static int btrfs_init_test_fs(void)
294e30fe JB	65	{
	66	int ret;
	67
	68	ret = register_filesystem(&test_type);
	69	if (ret) {
	70	printk(KERN_ERR "btrfs: cannot register test file system\n");
	71	return ret;
	72	}
	73
	74	test_mnt = kern_mount(&test_type);
	75	if (IS_ERR(test_mnt)) {
	76	printk(KERN_ERR "btrfs: cannot mount test file system\n");
	77	unregister_filesystem(&test_type);
04e1b65a	78	return PTR_ERR(test_mnt);
294e30fe JB	79	}
	80	return 0;
	81	}
	82
8632daae	83	static void btrfs_destroy_test_fs(void)
294e30fe JB	84	{
	85	kern_unmount(test_mnt);
	86	unregister_filesystem(&test_type);
	87	}
faa2dbf0	88
da17066c	89	struct btrfs_fs_info *btrfs_alloc_dummy_fs_info(u32 nodesize, u32 sectorsize)
faa2dbf0 JB	90	{
faa2dbf0 JB	91	struct btrfs_fs_info *fs_info = kzalloc(sizeof(struct btrfs_fs_info),
8cce83ba	92	GFP_KERNEL);
faa2dbf0 JB	93
	94	if (!fs_info)
	95	return fs_info;
	96	fs_info->fs_devices = kzalloc(sizeof(struct btrfs_fs_devices),
8cce83ba	97	GFP_KERNEL);
faa2dbf0 JB	98	if (!fs_info->fs_devices) {
	99	kfree(fs_info);
	100	return NULL;
	101	}
	102	fs_info->super_copy = kzalloc(sizeof(struct btrfs_super_block),
8cce83ba	103	GFP_KERNEL);
faa2dbf0 JB	104	if (!fs_info->super_copy) {
	105	kfree(fs_info->fs_devices);
	106	kfree(fs_info);
	107	return NULL;
	108	}
	109
da17066c JM	110	fs_info->nodesize = nodesize;
	111	fs_info->sectorsize = sectorsize;
	112
faa2dbf0 JB	113	if (init_srcu_struct(&fs_info->subvol_srcu)) {
	114	kfree(fs_info->fs_devices);
	115	kfree(fs_info->super_copy);
	116	kfree(fs_info);
	117	return NULL;
	118	}
	119
	120	spin_lock_init(&fs_info->buffer_lock);
	121	spin_lock_init(&fs_info->qgroup_lock);
faa2dbf0 JB	122	spin_lock_init(&fs_info->super_lock);
	123	spin_lock_init(&fs_info->fs_roots_radix_lock);
	124	spin_lock_init(&fs_info->tree_mod_seq_lock);
	125	mutex_init(&fs_info->qgroup_ioctl_lock);
	126	mutex_init(&fs_info->qgroup_rescan_lock);
	127	rwlock_init(&fs_info->tree_mod_log_lock);
	128	fs_info->running_transaction = NULL;
	129	fs_info->qgroup_tree = RB_ROOT;
	130	fs_info->qgroup_ulist = NULL;
	131	atomic64_set(&fs_info->tree_mod_seq, 0);
	132	INIT_LIST_HEAD(&fs_info->dirty_qgroups);
	133	INIT_LIST_HEAD(&fs_info->dead_roots);
	134	INIT_LIST_HEAD(&fs_info->tree_mod_seq_list);
	135	INIT_RADIX_TREE(&fs_info->buffer_radix, GFP_ATOMIC);
	136	INIT_RADIX_TREE(&fs_info->fs_roots_radix, GFP_ATOMIC);
43eb5f29 QW	137	extent_io_tree_init(fs_info, &fs_info->freed_extents[0],
	138	IO_TREE_FS_INFO_FREED_EXTENTS0, NULL);
	139	extent_io_tree_init(fs_info, &fs_info->freed_extents[1],
	140	IO_TREE_FS_INFO_FREED_EXTENTS1, NULL);
7c55ee0c	141	fs_info->pinned_extents = &fs_info->freed_extents[0];
7c0260ee JM	142	set_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);
	143
	144	test_mnt->mnt_sb->s_fs_info = fs_info;
	145
faa2dbf0 JB	146	return fs_info;
	147	}
	148
7c0260ee	149	void btrfs_free_dummy_fs_info(struct btrfs_fs_info *fs_info)
faa2dbf0 JB	150	{
	151	struct radix_tree_iter iter;
	152	void **slot;
	153
7c0260ee JM	154	if (!fs_info)
	155	return;
	156
	157	if (WARN_ON(!test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO,
	158	&fs_info->fs_state)))
	159	return;
	160
	161	test_mnt->mnt_sb->s_fs_info = NULL;
	162
faa2dbf0	163	spin_lock(&fs_info->buffer_lock);
faa2dbf0 JB	164	radix_tree_for_each_slot(slot, &fs_info->buffer_radix, &iter, 0) {
	165	struct extent_buffer *eb;
	166
f1e3c289	167	eb = radix_tree_deref_slot_protected(slot, &fs_info->buffer_lock);
faa2dbf0 JB	168	if (!eb)
	169	continue;
	170	/* Shouldn't happen but that kind of thinking creates CVE's */
	171	if (radix_tree_exception(eb)) {
	172	if (radix_tree_deref_retry(eb))
c28f2420	173	slot = radix_tree_iter_retry(&iter);
faa2dbf0 JB	174	continue;
faa2dbf0 JB	175	}
148deab2	176	slot = radix_tree_iter_resume(slot, &iter);
faa2dbf0 JB	177	spin_unlock(&fs_info->buffer_lock);
	178	free_extent_buffer_stale(eb);
	179	spin_lock(&fs_info->buffer_lock);
	180	}
	181	spin_unlock(&fs_info->buffer_lock);
	182
	183	btrfs_free_qgroup_config(fs_info);
	184	btrfs_free_fs_roots(fs_info);
	185	cleanup_srcu_struct(&fs_info->subvol_srcu);
	186	kfree(fs_info->super_copy);
	187	kfree(fs_info->fs_devices);
	188	kfree(fs_info);
	189	}
	190
	191	void btrfs_free_dummy_root(struct btrfs_root *root)
	192	{
	193	if (!root)
	194	return;
7c0260ee JM	195	/* Will be freed by btrfs_free_fs_roots */
	196	if (WARN_ON(test_bit(BTRFS_ROOT_IN_RADIX, &root->state)))
	197	return;
9cfc8ba7 NB	198	if (root->node) {
9cfc8ba7 NB	199	/* One for allocate_extent_buffer */
faa2dbf0	200	free_extent_buffer(root->node);
9cfc8ba7	201	}
faa2dbf0 JB	202	kfree(root);
	203	}
	204
7c55ee0c	205	struct btrfs_block_group_cache *
da17066c JM	206	btrfs_alloc_dummy_block_group(struct btrfs_fs_info *fs_info,
da17066c JM	207	unsigned long length)
7c55ee0c OS	208	{
	209	struct btrfs_block_group_cache *cache;
	210
8cce83ba	211	cache = kzalloc(sizeof(*cache), GFP_KERNEL);
7c55ee0c OS	212	if (!cache)
	213	return NULL;
	214	cache->free_space_ctl = kzalloc(sizeof(*cache->free_space_ctl),
8cce83ba	215	GFP_KERNEL);
7c55ee0c OS	216	if (!cache->free_space_ctl) {
	217	kfree(cache);
	218	return NULL;
	219	}
	220
b3470b5d DS	221	cache->start = 0;
b3470b5d DS	222	cache->length = length;
da17066c JM	223	cache->full_stripe_len = fs_info->sectorsize;
da17066c JM	224	cache->fs_info = fs_info;
7c55ee0c OS	225
	226	INIT_LIST_HEAD(&cache->list);
	227	INIT_LIST_HEAD(&cache->cluster_list);
	228	INIT_LIST_HEAD(&cache->bg_list);
	229	btrfs_init_free_space_ctl(cache);
	230	mutex_init(&cache->free_space_lock);
	231
	232	return cache;
	233	}
	234
	235	void btrfs_free_dummy_block_group(struct btrfs_block_group_cache *cache)
	236	{
	237	if (!cache)
	238	return;
	239	__btrfs_remove_free_space_cache(cache->free_space_ctl);
	240	kfree(cache->free_space_ctl);
	241	kfree(cache);
	242	}
	243
483bce06 NB	244	void btrfs_init_dummy_trans(struct btrfs_trans_handle *trans,
483bce06 NB	245	struct btrfs_fs_info *fs_info)
7c55ee0c OS	246	{
	247	memset(trans, 0, sizeof(*trans));
	248	trans->transid = 1;
7c55ee0c	249	trans->type = __TRANS_DUMMY;
483bce06	250	trans->fs_info = fs_info;
7c55ee0c	251	}
8632daae JM	252
	253	int btrfs_run_sanity_tests(void)
	254	{
	255	int ret, i;
	256	u32 sectorsize, nodesize;
	257	u32 test_sectorsize[] = {
	258	PAGE_SIZE,
	259	};
	260	ret = btrfs_init_test_fs();
	261	if (ret)
	262	return ret;
	263	for (i = 0; i < ARRAY_SIZE(test_sectorsize); i++) {
	264	sectorsize = test_sectorsize[i];
	265	for (nodesize = sectorsize;
	266	nodesize <= BTRFS_MAX_METADATA_BLOCKSIZE;
	267	nodesize <<= 1) {
	268	pr_info("BTRFS: selftest: sectorsize: %u nodesize: %u\n",
	269	sectorsize, nodesize);
	270	ret = btrfs_test_free_space_cache(sectorsize, nodesize);
	271	if (ret)
	272	goto out;
	273	ret = btrfs_test_extent_buffer_operations(sectorsize,
	274	nodesize);
	275	if (ret)
	276	goto out;
	277	ret = btrfs_test_extent_io(sectorsize, nodesize);
	278	if (ret)
	279	goto out;
	280	ret = btrfs_test_inodes(sectorsize, nodesize);
	281	if (ret)
	282	goto out;
	283	ret = btrfs_test_qgroups(sectorsize, nodesize);
	284	if (ret)
	285	goto out;
	286	ret = btrfs_test_free_space_tree(sectorsize, nodesize);
	287	if (ret)
	288	goto out;
	289	}
	290	}
72b28077	291	ret = btrfs_test_extent_map();
7a61f880	292
8632daae JM	293	out:
	294	btrfs_destroy_test_fs();
	295	return ret;
	296	}