linux/fs/btrfs/tests/extent-io-tests.c
David Sterba b2136cc288 btrfs: tests: allocate dummy fs_info and root in test_find_delalloc()
Allocate fs_info and root to have a valid fs_info pointer in case it's
dereferenced by a helper outside of tests, like find_lock_delalloc_range().

Signed-off-by: David Sterba <dsterba@suse.com>
2024-03-04 16:24:49 +01:00

833 lines
21 KiB
C

// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2013 Fusion IO. All rights reserved.
*/
#include <linux/pagemap.h>
#include <linux/pagevec.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/sizes.h>
#include "btrfs-tests.h"
#include "../ctree.h"
#include "../extent_io.h"
#include "../disk-io.h"
#include "../btrfs_inode.h"
#define PROCESS_UNLOCK (1 << 0)
#define PROCESS_RELEASE (1 << 1)
#define PROCESS_TEST_LOCKED (1 << 2)
static noinline int process_page_range(struct inode *inode, u64 start, u64 end,
unsigned long flags)
{
int ret;
struct folio_batch fbatch;
unsigned long index = start >> PAGE_SHIFT;
unsigned long end_index = end >> PAGE_SHIFT;
int i;
int count = 0;
int loops = 0;
folio_batch_init(&fbatch);
while (index <= end_index) {
ret = filemap_get_folios_contig(inode->i_mapping, &index,
end_index, &fbatch);
for (i = 0; i < ret; i++) {
struct folio *folio = fbatch.folios[i];
if (flags & PROCESS_TEST_LOCKED &&
!folio_test_locked(folio))
count++;
if (flags & PROCESS_UNLOCK && folio_test_locked(folio))
folio_unlock(folio);
if (flags & PROCESS_RELEASE)
folio_put(folio);
}
folio_batch_release(&fbatch);
cond_resched();
loops++;
if (loops > 100000) {
printk(KERN_ERR
"stuck in a loop, start %llu, end %llu, ret %d\n",
start, end, ret);
break;
}
}
return count;
}
#define STATE_FLAG_STR_LEN 256
#define PRINT_ONE_FLAG(state, dest, cur, name) \
({ \
if (state->state & EXTENT_##name) \
cur += scnprintf(dest + cur, STATE_FLAG_STR_LEN - cur, \
"%s" #name, cur == 0 ? "" : "|"); \
})
static void extent_flag_to_str(const struct extent_state *state, char *dest)
{
int cur = 0;
dest[0] = 0;
PRINT_ONE_FLAG(state, dest, cur, DIRTY);
PRINT_ONE_FLAG(state, dest, cur, UPTODATE);
PRINT_ONE_FLAG(state, dest, cur, LOCKED);
PRINT_ONE_FLAG(state, dest, cur, NEW);
PRINT_ONE_FLAG(state, dest, cur, DELALLOC);
PRINT_ONE_FLAG(state, dest, cur, DEFRAG);
PRINT_ONE_FLAG(state, dest, cur, BOUNDARY);
PRINT_ONE_FLAG(state, dest, cur, NODATASUM);
PRINT_ONE_FLAG(state, dest, cur, CLEAR_META_RESV);
PRINT_ONE_FLAG(state, dest, cur, NEED_WAIT);
PRINT_ONE_FLAG(state, dest, cur, NORESERVE);
PRINT_ONE_FLAG(state, dest, cur, QGROUP_RESERVED);
PRINT_ONE_FLAG(state, dest, cur, CLEAR_DATA_RESV);
}
static void dump_extent_io_tree(const struct extent_io_tree *tree)
{
struct rb_node *node;
char flags_str[STATE_FLAG_STR_LEN];
node = rb_first(&tree->state);
test_msg("io tree content:");
while (node) {
struct extent_state *state;
state = rb_entry(node, struct extent_state, rb_node);
extent_flag_to_str(state, flags_str);
test_msg(" start=%llu len=%llu flags=%s", state->start,
state->end + 1 - state->start, flags_str);
node = rb_next(node);
}
}
static int test_find_delalloc(u32 sectorsize, u32 nodesize)
{
struct btrfs_fs_info *fs_info;
struct btrfs_root *root = NULL;
struct inode *inode = NULL;
struct extent_io_tree *tmp;
struct page *page;
struct page *locked_page = NULL;
unsigned long index = 0;
/* In this test we need at least 2 file extents at its maximum size */
u64 max_bytes = BTRFS_MAX_EXTENT_SIZE;
u64 total_dirty = 2 * max_bytes;
u64 start, end, test_start;
bool found;
int ret = -EINVAL;
test_msg("running find delalloc tests");
fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
if (!fs_info) {
test_std_err(TEST_ALLOC_FS_INFO);
return -ENOMEM;
}
root = btrfs_alloc_dummy_root(fs_info);
if (IS_ERR(root)) {
test_std_err(TEST_ALLOC_ROOT);
ret = PTR_ERR(root);
goto out;
}
inode = btrfs_new_test_inode();
if (!inode) {
test_std_err(TEST_ALLOC_INODE);
ret = -ENOMEM;
goto out;
}
tmp = &BTRFS_I(inode)->io_tree;
BTRFS_I(inode)->root = root;
/*
* Passing NULL as we don't have fs_info but tracepoints are not used
* at this point
*/
extent_io_tree_init(NULL, tmp, IO_TREE_SELFTEST);
/*
* First go through and create and mark all of our pages dirty, we pin
* everything to make sure our pages don't get evicted and screw up our
* test.
*/
for (index = 0; index < (total_dirty >> PAGE_SHIFT); index++) {
page = find_or_create_page(inode->i_mapping, index, GFP_KERNEL);
if (!page) {
test_err("failed to allocate test page");
ret = -ENOMEM;
goto out;
}
SetPageDirty(page);
if (index) {
unlock_page(page);
} else {
get_page(page);
locked_page = page;
}
}
/* Test this scenario
* |--- delalloc ---|
* |--- search ---|
*/
set_extent_bit(tmp, 0, sectorsize - 1, EXTENT_DELALLOC, NULL);
start = 0;
end = start + PAGE_SIZE - 1;
found = find_lock_delalloc_range(inode, locked_page, &start,
&end);
if (!found) {
test_err("should have found at least one delalloc");
goto out_bits;
}
if (start != 0 || end != (sectorsize - 1)) {
test_err("expected start 0 end %u, got start %llu end %llu",
sectorsize - 1, start, end);
goto out_bits;
}
unlock_extent(tmp, start, end, NULL);
unlock_page(locked_page);
put_page(locked_page);
/*
* Test this scenario
*
* |--- delalloc ---|
* |--- search ---|
*/
test_start = SZ_64M;
locked_page = find_lock_page(inode->i_mapping,
test_start >> PAGE_SHIFT);
if (!locked_page) {
test_err("couldn't find the locked page");
goto out_bits;
}
set_extent_bit(tmp, sectorsize, max_bytes - 1, EXTENT_DELALLOC, NULL);
start = test_start;
end = start + PAGE_SIZE - 1;
found = find_lock_delalloc_range(inode, locked_page, &start,
&end);
if (!found) {
test_err("couldn't find delalloc in our range");
goto out_bits;
}
if (start != test_start || end != max_bytes - 1) {
test_err("expected start %llu end %llu, got start %llu, end %llu",
test_start, max_bytes - 1, start, end);
goto out_bits;
}
if (process_page_range(inode, start, end,
PROCESS_TEST_LOCKED | PROCESS_UNLOCK)) {
test_err("there were unlocked pages in the range");
goto out_bits;
}
unlock_extent(tmp, start, end, NULL);
/* locked_page was unlocked above */
put_page(locked_page);
/*
* Test this scenario
* |--- delalloc ---|
* |--- search ---|
*/
test_start = max_bytes + sectorsize;
locked_page = find_lock_page(inode->i_mapping, test_start >>
PAGE_SHIFT);
if (!locked_page) {
test_err("couldn't find the locked page");
goto out_bits;
}
start = test_start;
end = start + PAGE_SIZE - 1;
found = find_lock_delalloc_range(inode, locked_page, &start,
&end);
if (found) {
test_err("found range when we shouldn't have");
goto out_bits;
}
if (end != test_start + PAGE_SIZE - 1) {
test_err("did not return the proper end offset");
goto out_bits;
}
/*
* Test this scenario
* [------- delalloc -------|
* [max_bytes]|-- search--|
*
* We are re-using our test_start from above since it works out well.
*/
set_extent_bit(tmp, max_bytes, total_dirty - 1, EXTENT_DELALLOC, NULL);
start = test_start;
end = start + PAGE_SIZE - 1;
found = find_lock_delalloc_range(inode, locked_page, &start,
&end);
if (!found) {
test_err("didn't find our range");
goto out_bits;
}
if (start != test_start || end != total_dirty - 1) {
test_err("expected start %llu end %llu, got start %llu end %llu",
test_start, total_dirty - 1, start, end);
goto out_bits;
}
if (process_page_range(inode, start, end,
PROCESS_TEST_LOCKED | PROCESS_UNLOCK)) {
test_err("pages in range were not all locked");
goto out_bits;
}
unlock_extent(tmp, start, end, NULL);
/*
* Now to test where we run into a page that is no longer dirty in the
* range we want to find.
*/
page = find_get_page(inode->i_mapping,
(max_bytes + SZ_1M) >> PAGE_SHIFT);
if (!page) {
test_err("couldn't find our page");
goto out_bits;
}
ClearPageDirty(page);
put_page(page);
/* We unlocked it in the previous test */
lock_page(locked_page);
start = test_start;
end = start + PAGE_SIZE - 1;
/*
* Currently if we fail to find dirty pages in the delalloc range we
* will adjust max_bytes down to PAGE_SIZE and then re-search. If
* this changes at any point in the future we will need to fix this
* tests expected behavior.
*/
found = find_lock_delalloc_range(inode, locked_page, &start,
&end);
if (!found) {
test_err("didn't find our range");
goto out_bits;
}
if (start != test_start && end != test_start + PAGE_SIZE - 1) {
test_err("expected start %llu end %llu, got start %llu end %llu",
test_start, test_start + PAGE_SIZE - 1, start, end);
goto out_bits;
}
if (process_page_range(inode, start, end, PROCESS_TEST_LOCKED |
PROCESS_UNLOCK)) {
test_err("pages in range were not all locked");
goto out_bits;
}
ret = 0;
out_bits:
if (ret)
dump_extent_io_tree(tmp);
clear_extent_bits(tmp, 0, total_dirty - 1, (unsigned)-1);
out:
if (locked_page)
put_page(locked_page);
process_page_range(inode, 0, total_dirty - 1,
PROCESS_UNLOCK | PROCESS_RELEASE);
iput(inode);
btrfs_free_dummy_root(root);
btrfs_free_dummy_fs_info(fs_info);
return ret;
}
static int check_eb_bitmap(unsigned long *bitmap, struct extent_buffer *eb)
{
unsigned long i;
for (i = 0; i < eb->len * BITS_PER_BYTE; i++) {
int bit, bit1;
bit = !!test_bit(i, bitmap);
bit1 = !!extent_buffer_test_bit(eb, 0, i);
if (bit1 != bit) {
u8 has;
u8 expect;
read_extent_buffer(eb, &has, i / BITS_PER_BYTE, 1);
expect = bitmap_get_value8(bitmap, ALIGN(i, BITS_PER_BYTE));
test_err(
"bits do not match, start byte 0 bit %lu, byte %lu has 0x%02x expect 0x%02x",
i, i / BITS_PER_BYTE, has, expect);
return -EINVAL;
}
bit1 = !!extent_buffer_test_bit(eb, i / BITS_PER_BYTE,
i % BITS_PER_BYTE);
if (bit1 != bit) {
u8 has;
u8 expect;
read_extent_buffer(eb, &has, i / BITS_PER_BYTE, 1);
expect = bitmap_get_value8(bitmap, ALIGN(i, BITS_PER_BYTE));
test_err(
"bits do not match, start byte %lu bit %lu, byte %lu has 0x%02x expect 0x%02x",
i / BITS_PER_BYTE, i % BITS_PER_BYTE,
i / BITS_PER_BYTE, has, expect);
return -EINVAL;
}
}
return 0;
}
static int test_bitmap_set(const char *name, unsigned long *bitmap,
struct extent_buffer *eb,
unsigned long byte_start, unsigned long bit_start,
unsigned long bit_len)
{
int ret;
bitmap_set(bitmap, byte_start * BITS_PER_BYTE + bit_start, bit_len);
extent_buffer_bitmap_set(eb, byte_start, bit_start, bit_len);
ret = check_eb_bitmap(bitmap, eb);
if (ret < 0)
test_err("%s test failed", name);
return ret;
}
static int test_bitmap_clear(const char *name, unsigned long *bitmap,
struct extent_buffer *eb,
unsigned long byte_start, unsigned long bit_start,
unsigned long bit_len)
{
int ret;
bitmap_clear(bitmap, byte_start * BITS_PER_BYTE + bit_start, bit_len);
extent_buffer_bitmap_clear(eb, byte_start, bit_start, bit_len);
ret = check_eb_bitmap(bitmap, eb);
if (ret < 0)
test_err("%s test failed", name);
return ret;
}
static int __test_eb_bitmaps(unsigned long *bitmap, struct extent_buffer *eb)
{
unsigned long i, j;
unsigned long byte_len = eb->len;
u32 x;
int ret;
ret = test_bitmap_clear("clear all run 1", bitmap, eb, 0, 0,
byte_len * BITS_PER_BYTE);
if (ret < 0)
return ret;
ret = test_bitmap_set("set all", bitmap, eb, 0, 0, byte_len * BITS_PER_BYTE);
if (ret < 0)
return ret;
ret = test_bitmap_clear("clear all run 2", bitmap, eb, 0, 0,
byte_len * BITS_PER_BYTE);
if (ret < 0)
return ret;
ret = test_bitmap_set("same byte set", bitmap, eb, 0, 2, 4);
if (ret < 0)
return ret;
ret = test_bitmap_clear("same byte partial clear", bitmap, eb, 0, 4, 1);
if (ret < 0)
return ret;
ret = test_bitmap_set("cross byte set", bitmap, eb, 2, 4, 8);
if (ret < 0)
return ret;
ret = test_bitmap_set("cross multi byte set", bitmap, eb, 4, 4, 24);
if (ret < 0)
return ret;
ret = test_bitmap_clear("cross byte clear", bitmap, eb, 2, 6, 4);
if (ret < 0)
return ret;
ret = test_bitmap_clear("cross multi byte clear", bitmap, eb, 4, 6, 20);
if (ret < 0)
return ret;
/* Straddling pages test */
if (byte_len > PAGE_SIZE) {
ret = test_bitmap_set("cross page set", bitmap, eb,
PAGE_SIZE - sizeof(long) / 2, 0,
sizeof(long) * BITS_PER_BYTE);
if (ret < 0)
return ret;
ret = test_bitmap_set("cross page set all", bitmap, eb, 0, 0,
byte_len * BITS_PER_BYTE);
if (ret < 0)
return ret;
ret = test_bitmap_clear("cross page clear", bitmap, eb,
PAGE_SIZE - sizeof(long) / 2, 0,
sizeof(long) * BITS_PER_BYTE);
if (ret < 0)
return ret;
}
/*
* Generate a wonky pseudo-random bit pattern for the sake of not using
* something repetitive that could miss some hypothetical off-by-n bug.
*/
x = 0;
ret = test_bitmap_clear("clear all run 3", bitmap, eb, 0, 0,
byte_len * BITS_PER_BYTE);
if (ret < 0)
return ret;
for (i = 0; i < byte_len * BITS_PER_BYTE / 32; i++) {
x = (0x19660dULL * (u64)x + 0x3c6ef35fULL) & 0xffffffffU;
for (j = 0; j < 32; j++) {
if (x & (1U << j)) {
bitmap_set(bitmap, i * 32 + j, 1);
extent_buffer_bitmap_set(eb, 0, i * 32 + j, 1);
}
}
}
ret = check_eb_bitmap(bitmap, eb);
if (ret) {
test_err("random bit pattern failed");
return ret;
}
return 0;
}
static int test_eb_bitmaps(u32 sectorsize, u32 nodesize)
{
struct btrfs_fs_info *fs_info;
unsigned long *bitmap = NULL;
struct extent_buffer *eb = NULL;
int ret;
test_msg("running extent buffer bitmap tests");
fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
if (!fs_info) {
test_std_err(TEST_ALLOC_FS_INFO);
return -ENOMEM;
}
bitmap = kmalloc(nodesize, GFP_KERNEL);
if (!bitmap) {
test_err("couldn't allocate test bitmap");
ret = -ENOMEM;
goto out;
}
eb = __alloc_dummy_extent_buffer(fs_info, 0, nodesize);
if (!eb) {
test_std_err(TEST_ALLOC_ROOT);
ret = -ENOMEM;
goto out;
}
ret = __test_eb_bitmaps(bitmap, eb);
if (ret)
goto out;
free_extent_buffer(eb);
/*
* Test again for case where the tree block is sectorsize aligned but
* not nodesize aligned.
*/
eb = __alloc_dummy_extent_buffer(fs_info, sectorsize, nodesize);
if (!eb) {
test_std_err(TEST_ALLOC_ROOT);
ret = -ENOMEM;
goto out;
}
ret = __test_eb_bitmaps(bitmap, eb);
out:
free_extent_buffer(eb);
kfree(bitmap);
btrfs_free_dummy_fs_info(fs_info);
return ret;
}
static int test_find_first_clear_extent_bit(void)
{
struct extent_io_tree tree;
u64 start, end;
int ret = -EINVAL;
test_msg("running find_first_clear_extent_bit test");
extent_io_tree_init(NULL, &tree, IO_TREE_SELFTEST);
/* Test correct handling of empty tree */
find_first_clear_extent_bit(&tree, 0, &start, &end, CHUNK_TRIMMED);
if (start != 0 || end != -1) {
test_err(
"error getting a range from completely empty tree: start %llu end %llu",
start, end);
goto out;
}
/*
* Set 1M-4M alloc/discard and 32M-64M thus leaving a hole between
* 4M-32M
*/
set_extent_bit(&tree, SZ_1M, SZ_4M - 1,
CHUNK_TRIMMED | CHUNK_ALLOCATED, NULL);
find_first_clear_extent_bit(&tree, SZ_512K, &start, &end,
CHUNK_TRIMMED | CHUNK_ALLOCATED);
if (start != 0 || end != SZ_1M - 1) {
test_err("error finding beginning range: start %llu end %llu",
start, end);
goto out;
}
/* Now add 32M-64M so that we have a hole between 4M-32M */
set_extent_bit(&tree, SZ_32M, SZ_64M - 1,
CHUNK_TRIMMED | CHUNK_ALLOCATED, NULL);
/*
* Request first hole starting at 12M, we should get 4M-32M
*/
find_first_clear_extent_bit(&tree, 12 * SZ_1M, &start, &end,
CHUNK_TRIMMED | CHUNK_ALLOCATED);
if (start != SZ_4M || end != SZ_32M - 1) {
test_err("error finding trimmed range: start %llu end %llu",
start, end);
goto out;
}
/*
* Search in the middle of allocated range, should get the next one
* available, which happens to be unallocated -> 4M-32M
*/
find_first_clear_extent_bit(&tree, SZ_2M, &start, &end,
CHUNK_TRIMMED | CHUNK_ALLOCATED);
if (start != SZ_4M || end != SZ_32M - 1) {
test_err("error finding next unalloc range: start %llu end %llu",
start, end);
goto out;
}
/*
* Set 64M-72M with CHUNK_ALLOC flag, then search for CHUNK_TRIMMED flag
* being unset in this range, we should get the entry in range 64M-72M
*/
set_extent_bit(&tree, SZ_64M, SZ_64M + SZ_8M - 1, CHUNK_ALLOCATED, NULL);
find_first_clear_extent_bit(&tree, SZ_64M + SZ_1M, &start, &end,
CHUNK_TRIMMED);
if (start != SZ_64M || end != SZ_64M + SZ_8M - 1) {
test_err("error finding exact range: start %llu end %llu",
start, end);
goto out;
}
find_first_clear_extent_bit(&tree, SZ_64M - SZ_8M, &start, &end,
CHUNK_TRIMMED);
/*
* Search in the middle of set range whose immediate neighbour doesn't
* have the bits set so it must be returned
*/
if (start != SZ_64M || end != SZ_64M + SZ_8M - 1) {
test_err("error finding next alloc range: start %llu end %llu",
start, end);
goto out;
}
/*
* Search beyond any known range, shall return after last known range
* and end should be -1
*/
find_first_clear_extent_bit(&tree, -1, &start, &end, CHUNK_TRIMMED);
if (start != SZ_64M + SZ_8M || end != -1) {
test_err(
"error handling beyond end of range search: start %llu end %llu",
start, end);
goto out;
}
ret = 0;
out:
if (ret)
dump_extent_io_tree(&tree);
clear_extent_bits(&tree, 0, (u64)-1, CHUNK_TRIMMED | CHUNK_ALLOCATED);
return ret;
}
static void dump_eb_and_memory_contents(struct extent_buffer *eb, void *memory,
const char *test_name)
{
for (int i = 0; i < eb->len; i++) {
struct page *page = folio_page(eb->folios[i >> PAGE_SHIFT], 0);
void *addr = page_address(page) + offset_in_page(i);
if (memcmp(addr, memory + i, 1) != 0) {
test_err("%s failed", test_name);
test_err("eb and memory diffs at byte %u, eb has 0x%02x memory has 0x%02x",
i, *(u8 *)addr, *(u8 *)(memory + i));
return;
}
}
}
static int verify_eb_and_memory(struct extent_buffer *eb, void *memory,
const char *test_name)
{
for (int i = 0; i < (eb->len >> PAGE_SHIFT); i++) {
void *eb_addr = folio_address(eb->folios[i]);
if (memcmp(memory + (i << PAGE_SHIFT), eb_addr, PAGE_SIZE) != 0) {
dump_eb_and_memory_contents(eb, memory, test_name);
return -EUCLEAN;
}
}
return 0;
}
/*
* Init both memory and extent buffer contents to the same randomly generated
* contents.
*/
static void init_eb_and_memory(struct extent_buffer *eb, void *memory)
{
get_random_bytes(memory, eb->len);
write_extent_buffer(eb, memory, 0, eb->len);
}
static int test_eb_mem_ops(u32 sectorsize, u32 nodesize)
{
struct btrfs_fs_info *fs_info;
struct extent_buffer *eb = NULL;
void *memory = NULL;
int ret;
test_msg("running extent buffer memory operation tests");
fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
if (!fs_info) {
test_std_err(TEST_ALLOC_FS_INFO);
return -ENOMEM;
}
memory = kvzalloc(nodesize, GFP_KERNEL);
if (!memory) {
test_err("failed to allocate memory");
ret = -ENOMEM;
goto out;
}
eb = __alloc_dummy_extent_buffer(fs_info, SZ_1M, nodesize);
if (!eb) {
test_std_err(TEST_ALLOC_EXTENT_BUFFER);
ret = -ENOMEM;
goto out;
}
init_eb_and_memory(eb, memory);
ret = verify_eb_and_memory(eb, memory, "full eb write");
if (ret < 0)
goto out;
memcpy(memory, memory + 16, 16);
memcpy_extent_buffer(eb, 0, 16, 16);
ret = verify_eb_and_memory(eb, memory, "same page non-overlapping memcpy 1");
if (ret < 0)
goto out;
memcpy(memory, memory + 2048, 16);
memcpy_extent_buffer(eb, 0, 2048, 16);
ret = verify_eb_and_memory(eb, memory, "same page non-overlapping memcpy 2");
if (ret < 0)
goto out;
memcpy(memory, memory + 2048, 2048);
memcpy_extent_buffer(eb, 0, 2048, 2048);
ret = verify_eb_and_memory(eb, memory, "same page non-overlapping memcpy 3");
if (ret < 0)
goto out;
memmove(memory + 512, memory + 256, 512);
memmove_extent_buffer(eb, 512, 256, 512);
ret = verify_eb_and_memory(eb, memory, "same page overlapping memcpy 1");
if (ret < 0)
goto out;
memmove(memory + 2048, memory + 512, 2048);
memmove_extent_buffer(eb, 2048, 512, 2048);
ret = verify_eb_and_memory(eb, memory, "same page overlapping memcpy 2");
if (ret < 0)
goto out;
memmove(memory + 512, memory + 2048, 2048);
memmove_extent_buffer(eb, 512, 2048, 2048);
ret = verify_eb_and_memory(eb, memory, "same page overlapping memcpy 3");
if (ret < 0)
goto out;
if (nodesize > PAGE_SIZE) {
memcpy(memory, memory + 4096 - 128, 256);
memcpy_extent_buffer(eb, 0, 4096 - 128, 256);
ret = verify_eb_and_memory(eb, memory, "cross page non-overlapping memcpy 1");
if (ret < 0)
goto out;
memcpy(memory + 4096 - 128, memory + 4096 + 128, 256);
memcpy_extent_buffer(eb, 4096 - 128, 4096 + 128, 256);
ret = verify_eb_and_memory(eb, memory, "cross page non-overlapping memcpy 2");
if (ret < 0)
goto out;
memmove(memory + 4096 - 128, memory + 4096 - 64, 256);
memmove_extent_buffer(eb, 4096 - 128, 4096 - 64, 256);
ret = verify_eb_and_memory(eb, memory, "cross page overlapping memcpy 1");
if (ret < 0)
goto out;
memmove(memory + 4096 - 64, memory + 4096 - 128, 256);
memmove_extent_buffer(eb, 4096 - 64, 4096 - 128, 256);
ret = verify_eb_and_memory(eb, memory, "cross page overlapping memcpy 2");
if (ret < 0)
goto out;
}
out:
free_extent_buffer(eb);
kvfree(memory);
btrfs_free_dummy_fs_info(fs_info);
return ret;
}
int btrfs_test_extent_io(u32 sectorsize, u32 nodesize)
{
int ret;
test_msg("running extent I/O tests");
ret = test_find_delalloc(sectorsize, nodesize);
if (ret)
goto out;
ret = test_find_first_clear_extent_bit();
if (ret)
goto out;
ret = test_eb_bitmaps(sectorsize, nodesize);
if (ret)
goto out;
ret = test_eb_mem_ops(sectorsize, nodesize);
out:
return ret;
}