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linux/lib/test_maple_tree.c
Liam Howlett c5651b31f5 test_maple_tree: add test for mas_spanning_rebalance() on insufficient data 
Add a test to the maple tree test suite for the spanning rebalance
insufficient node issue does not go undetected again.

Link: https://lkml.kernel.org/r/20221219161922.2708732-3-Liam.Howlett@oracle.com
Fixes: 54a611b605 ("Maple Tree: add new data structure")
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Andrei Vagin <avagin@gmail.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Muhammad Usama Anjum <usama.anjum@collabora.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2022-12-21 14:31:52 -08:00

2791 lines
72 KiB
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// SPDX-License-Identifier: GPL-2.0+
/*
* test_maple_tree.c: Test the maple tree API
* Copyright (c) 2018-2022 Oracle Corporation
* Author: Liam R. Howlett <Liam.Howlett@Oracle.com>
*
* Any tests that only require the interface of the tree.
*/
#include <linux/maple_tree.h>
#include <linux/module.h>
#define MTREE_ALLOC_MAX 0x2000000000000Ul
#ifndef CONFIG_DEBUG_MAPLE_TREE
#define CONFIG_DEBUG_MAPLE_TREE
#endif
#define CONFIG_MAPLE_SEARCH
#define MAPLE_32BIT (MAPLE_NODE_SLOTS > 31)
/* #define BENCH_SLOT_STORE */
/* #define BENCH_NODE_STORE */
/* #define BENCH_AWALK */
/* #define BENCH_WALK */
/* #define BENCH_MT_FOR_EACH */
/* #define BENCH_FORK */
#ifdef __KERNEL__
#define mt_set_non_kernel(x) do {} while (0)
#define mt_zero_nr_tallocated(x) do {} while (0)
#else
#define cond_resched() do {} while (0)
#endif
static
int mtree_insert_index(struct maple_tree *mt, unsigned long index, gfp_t gfp)
{
return mtree_insert(mt, index, xa_mk_value(index & LONG_MAX), gfp);
}
static void mtree_erase_index(struct maple_tree *mt, unsigned long index)
{
MT_BUG_ON(mt, mtree_erase(mt, index) != xa_mk_value(index & LONG_MAX));
MT_BUG_ON(mt, mtree_load(mt, index) != NULL);
}
static int mtree_test_insert(struct maple_tree *mt, unsigned long index,
void *ptr)
{
return mtree_insert(mt, index, ptr, GFP_KERNEL);
}
static int mtree_test_store_range(struct maple_tree *mt, unsigned long start,
unsigned long end, void *ptr)
{
return mtree_store_range(mt, start, end, ptr, GFP_KERNEL);
}
static int mtree_test_store(struct maple_tree *mt, unsigned long start,
void *ptr)
{
return mtree_test_store_range(mt, start, start, ptr);
}
static int mtree_test_insert_range(struct maple_tree *mt, unsigned long start,
unsigned long end, void *ptr)
{
return mtree_insert_range(mt, start, end, ptr, GFP_KERNEL);
}
static void *mtree_test_load(struct maple_tree *mt, unsigned long index)
{
return mtree_load(mt, index);
}
static void *mtree_test_erase(struct maple_tree *mt, unsigned long index)
{
return mtree_erase(mt, index);
}
#if defined(CONFIG_64BIT)
static noinline void check_mtree_alloc_range(struct maple_tree *mt,
unsigned long start, unsigned long end, unsigned long size,
unsigned long expected, int eret, void *ptr)
{
unsigned long result = expected + 1;
int ret;
ret = mtree_alloc_range(mt, &result, ptr, size, start, end,
GFP_KERNEL);
MT_BUG_ON(mt, ret != eret);
if (ret)
return;
MT_BUG_ON(mt, result != expected);
}
static noinline void check_mtree_alloc_rrange(struct maple_tree *mt,
unsigned long start, unsigned long end, unsigned long size,
unsigned long expected, int eret, void *ptr)
{
unsigned long result = expected + 1;
int ret;
ret = mtree_alloc_rrange(mt, &result, ptr, size, start, end - 1,
GFP_KERNEL);
MT_BUG_ON(mt, ret != eret);
if (ret)
return;
MT_BUG_ON(mt, result != expected);
}
#endif
static noinline void check_load(struct maple_tree *mt, unsigned long index,
void *ptr)
{
void *ret = mtree_test_load(mt, index);
if (ret != ptr)
pr_err("Load %lu returned %p expect %p\n", index, ret, ptr);
MT_BUG_ON(mt, ret != ptr);
}
static noinline void check_store_range(struct maple_tree *mt,
unsigned long start, unsigned long end, void *ptr, int expected)
{
int ret = -EINVAL;
unsigned long i;
ret = mtree_test_store_range(mt, start, end, ptr);
MT_BUG_ON(mt, ret != expected);
if (ret)
return;
for (i = start; i <= end; i++)
check_load(mt, i, ptr);
}
static noinline void check_insert_range(struct maple_tree *mt,
unsigned long start, unsigned long end, void *ptr, int expected)
{
int ret = -EINVAL;
unsigned long i;
ret = mtree_test_insert_range(mt, start, end, ptr);
MT_BUG_ON(mt, ret != expected);
if (ret)
return;
for (i = start; i <= end; i++)
check_load(mt, i, ptr);
}
static noinline void check_insert(struct maple_tree *mt, unsigned long index,
void *ptr)
{
int ret = -EINVAL;
ret = mtree_test_insert(mt, index, ptr);
MT_BUG_ON(mt, ret != 0);
}
static noinline void check_dup_insert(struct maple_tree *mt,
unsigned long index, void *ptr)
{
int ret = -EINVAL;
ret = mtree_test_insert(mt, index, ptr);
MT_BUG_ON(mt, ret != -EEXIST);
}
static noinline
void check_index_load(struct maple_tree *mt, unsigned long index)
{
return check_load(mt, index, xa_mk_value(index & LONG_MAX));
}
static inline int not_empty(struct maple_node *node)
{
int i;
if (node->parent)
return 1;
for (i = 0; i < ARRAY_SIZE(node->slot); i++)
if (node->slot[i])
return 1;
return 0;
}
static noinline void check_rev_seq(struct maple_tree *mt, unsigned long max,
bool verbose)
{
unsigned long i = max, j;
MT_BUG_ON(mt, !mtree_empty(mt));
mt_zero_nr_tallocated();
while (i) {
MT_BUG_ON(mt, mtree_insert_index(mt, i, GFP_KERNEL));
for (j = i; j <= max; j++)
check_index_load(mt, j);
check_load(mt, i - 1, NULL);
mt_set_in_rcu(mt);
MT_BUG_ON(mt, !mt_height(mt));
mt_clear_in_rcu(mt);
MT_BUG_ON(mt, !mt_height(mt));
i--;
}
check_load(mt, max + 1, NULL);
#ifndef __KERNEL__
if (verbose) {
rcu_barrier();
mt_dump(mt);
pr_info(" %s test of 0-%lu %luK in %d active (%d total)\n",
__func__, max, mt_get_alloc_size()/1024, mt_nr_allocated(),
mt_nr_tallocated());
}
#endif
}
static noinline void check_seq(struct maple_tree *mt, unsigned long max,
bool verbose)
{
unsigned long i, j;
MT_BUG_ON(mt, !mtree_empty(mt));
mt_zero_nr_tallocated();
for (i = 0; i <= max; i++) {
MT_BUG_ON(mt, mtree_insert_index(mt, i, GFP_KERNEL));
for (j = 0; j <= i; j++)
check_index_load(mt, j);
if (i)
MT_BUG_ON(mt, !mt_height(mt));
check_load(mt, i + 1, NULL);
}
#ifndef __KERNEL__
if (verbose) {
rcu_barrier();
mt_dump(mt);
pr_info(" seq test of 0-%lu %luK in %d active (%d total)\n",
max, mt_get_alloc_size()/1024, mt_nr_allocated(),
mt_nr_tallocated());
}
#endif
}
static noinline void check_lb_not_empty(struct maple_tree *mt)
{
unsigned long i, j;
unsigned long huge = 4000UL * 1000 * 1000;
i = huge;
while (i > 4096) {
check_insert(mt, i, (void *) i);
for (j = huge; j >= i; j /= 2) {
check_load(mt, j-1, NULL);
check_load(mt, j, (void *) j);
check_load(mt, j+1, NULL);
}
i /= 2;
}
mtree_destroy(mt);
}
static noinline void check_lower_bound_split(struct maple_tree *mt)
{
MT_BUG_ON(mt, !mtree_empty(mt));
check_lb_not_empty(mt);
}
static noinline void check_upper_bound_split(struct maple_tree *mt)
{
unsigned long i, j;
unsigned long huge;
MT_BUG_ON(mt, !mtree_empty(mt));
if (MAPLE_32BIT)
huge = 2147483647UL;
else
huge = 4000UL * 1000 * 1000;
i = 4096;
while (i < huge) {
check_insert(mt, i, (void *) i);
for (j = i; j >= huge; j *= 2) {
check_load(mt, j-1, NULL);
check_load(mt, j, (void *) j);
check_load(mt, j+1, NULL);
}
i *= 2;
}
mtree_destroy(mt);
}
static noinline void check_mid_split(struct maple_tree *mt)
{
unsigned long huge = 8000UL * 1000 * 1000;
check_insert(mt, huge, (void *) huge);
check_insert(mt, 0, xa_mk_value(0));
check_lb_not_empty(mt);
}
static noinline void check_rev_find(struct maple_tree *mt)
{
int i, nr_entries = 200;
void *val;
MA_STATE(mas, mt, 0, 0);
for (i = 0; i <= nr_entries; i++)
mtree_store_range(mt, i*10, i*10 + 5,
xa_mk_value(i), GFP_KERNEL);
rcu_read_lock();
mas_set(&mas, 1000);
val = mas_find_rev(&mas, 1000);
MT_BUG_ON(mt, val != xa_mk_value(100));
val = mas_find_rev(&mas, 1000);
MT_BUG_ON(mt, val != NULL);
mas_set(&mas, 999);
val = mas_find_rev(&mas, 997);
MT_BUG_ON(mt, val != NULL);
mas_set(&mas, 1000);
val = mas_find_rev(&mas, 900);
MT_BUG_ON(mt, val != xa_mk_value(100));
val = mas_find_rev(&mas, 900);
MT_BUG_ON(mt, val != xa_mk_value(99));
mas_set(&mas, 20);
val = mas_find_rev(&mas, 0);
MT_BUG_ON(mt, val != xa_mk_value(2));
val = mas_find_rev(&mas, 0);
MT_BUG_ON(mt, val != xa_mk_value(1));
val = mas_find_rev(&mas, 0);
MT_BUG_ON(mt, val != xa_mk_value(0));
val = mas_find_rev(&mas, 0);
MT_BUG_ON(mt, val != NULL);
rcu_read_unlock();
}
static noinline void check_find(struct maple_tree *mt)
{
unsigned long val = 0;
unsigned long count;
unsigned long max;
unsigned long top;
unsigned long last = 0, index = 0;
void *entry, *entry2;
MA_STATE(mas, mt, 0, 0);
/* Insert 0. */
MT_BUG_ON(mt, mtree_insert_index(mt, val++, GFP_KERNEL));
#if defined(CONFIG_64BIT)
top = 4398046511104UL;
#else
top = ULONG_MAX;
#endif
if (MAPLE_32BIT) {
count = 15;
} else {
count = 20;
}
for (int i = 0; i <= count; i++) {
if (val != 64)
MT_BUG_ON(mt, mtree_insert_index(mt, val, GFP_KERNEL));
else
MT_BUG_ON(mt, mtree_insert(mt, val,
XA_ZERO_ENTRY, GFP_KERNEL));
val <<= 2;
}
val = 0;
mas_set(&mas, val);
mas_lock(&mas);
while ((entry = mas_find(&mas, 268435456)) != NULL) {
if (val != 64)
MT_BUG_ON(mt, xa_mk_value(val) != entry);
else
MT_BUG_ON(mt, entry != XA_ZERO_ENTRY);
val <<= 2;
/* For zero check. */
if (!val)
val = 1;
}
mas_unlock(&mas);
val = 0;
mas_set(&mas, val);
mas_lock(&mas);
mas_for_each(&mas, entry, ULONG_MAX) {
if (val != 64)
MT_BUG_ON(mt, xa_mk_value(val) != entry);
else
MT_BUG_ON(mt, entry != XA_ZERO_ENTRY);
val <<= 2;
/* For zero check. */
if (!val)
val = 1;
}
mas_unlock(&mas);
/* Test mas_pause */
val = 0;
mas_set(&mas, val);
mas_lock(&mas);
mas_for_each(&mas, entry, ULONG_MAX) {
if (val != 64)
MT_BUG_ON(mt, xa_mk_value(val) != entry);
else
MT_BUG_ON(mt, entry != XA_ZERO_ENTRY);
val <<= 2;
/* For zero check. */
if (!val)
val = 1;
mas_pause(&mas);
mas_unlock(&mas);
mas_lock(&mas);
}
mas_unlock(&mas);
val = 0;
max = 300; /* A value big enough to include XA_ZERO_ENTRY at 64. */
mt_for_each(mt, entry, index, max) {
MT_BUG_ON(mt, xa_mk_value(val) != entry);
val <<= 2;
if (val == 64) /* Skip zero entry. */
val <<= 2;
/* For zero check. */
if (!val)
val = 1;
}
val = 0;
max = 0;
index = 0;
MT_BUG_ON(mt, mtree_insert_index(mt, ULONG_MAX, GFP_KERNEL));
mt_for_each(mt, entry, index, ULONG_MAX) {
if (val == top)
MT_BUG_ON(mt, entry != xa_mk_value(LONG_MAX));
else
MT_BUG_ON(mt, xa_mk_value(val) != entry);
/* Workaround for 32bit */
if ((val << 2) < val)
val = ULONG_MAX;
else
val <<= 2;
if (val == 64) /* Skip zero entry. */
val <<= 2;
/* For zero check. */
if (!val)
val = 1;
max++;
MT_BUG_ON(mt, max > 25);
}
mtree_erase_index(mt, ULONG_MAX);
mas_reset(&mas);
index = 17;
entry = mt_find(mt, &index, 512);
MT_BUG_ON(mt, xa_mk_value(256) != entry);
mas_reset(&mas);
index = 17;
entry = mt_find(mt, &index, 20);
MT_BUG_ON(mt, entry != NULL);
/* Range check.. */
/* Insert ULONG_MAX */
MT_BUG_ON(mt, mtree_insert_index(mt, ULONG_MAX, GFP_KERNEL));
val = 0;
mas_set(&mas, 0);
mas_lock(&mas);
mas_for_each(&mas, entry, ULONG_MAX) {
if (val == 64)
MT_BUG_ON(mt, entry != XA_ZERO_ENTRY);
else if (val == top)
MT_BUG_ON(mt, entry != xa_mk_value(LONG_MAX));
else
MT_BUG_ON(mt, xa_mk_value(val) != entry);
/* Workaround for 32bit */
if ((val << 2) < val)
val = ULONG_MAX;
else
val <<= 2;
/* For zero check. */
if (!val)
val = 1;
mas_pause(&mas);
mas_unlock(&mas);
mas_lock(&mas);
}
mas_unlock(&mas);
mas_set(&mas, 1048576);
mas_lock(&mas);
entry = mas_find(&mas, 1048576);
mas_unlock(&mas);
MT_BUG_ON(mas.tree, entry == NULL);
/*
* Find last value.
* 1. get the expected value, leveraging the existence of an end entry
* 2. delete end entry
* 3. find the last value but searching for ULONG_MAX and then using
* prev
*/
/* First, get the expected result. */
mas_lock(&mas);
mas_reset(&mas);
mas.index = ULONG_MAX; /* start at max.. */
entry = mas_find(&mas, ULONG_MAX);
entry = mas_prev(&mas, 0);
index = mas.index;
last = mas.last;
/* Erase the last entry. */
mas_reset(&mas);
mas.index = ULONG_MAX;
mas.last = ULONG_MAX;
mas_erase(&mas);
/* Get the previous value from MAS_START */
mas_reset(&mas);
entry2 = mas_prev(&mas, 0);
/* Check results. */
MT_BUG_ON(mt, entry != entry2);
MT_BUG_ON(mt, index != mas.index);
MT_BUG_ON(mt, last != mas.last);
mas.node = MAS_NONE;
mas.index = ULONG_MAX;
mas.last = ULONG_MAX;
entry2 = mas_prev(&mas, 0);
MT_BUG_ON(mt, entry != entry2);
mas_set(&mas, 0);
MT_BUG_ON(mt, mas_prev(&mas, 0) != NULL);
mas_unlock(&mas);
mtree_destroy(mt);
}
static noinline void check_find_2(struct maple_tree *mt)
{
unsigned long i, j;
void *entry;
MA_STATE(mas, mt, 0, 0);
rcu_read_lock();
mas_for_each(&mas, entry, ULONG_MAX)
MT_BUG_ON(mt, true);
rcu_read_unlock();
for (i = 0; i < 256; i++) {
mtree_insert_index(mt, i, GFP_KERNEL);
j = 0;
mas_set(&mas, 0);
rcu_read_lock();
mas_for_each(&mas, entry, ULONG_MAX) {
MT_BUG_ON(mt, entry != xa_mk_value(j));
j++;
}
rcu_read_unlock();
MT_BUG_ON(mt, j != i + 1);
}
for (i = 0; i < 256; i++) {
mtree_erase_index(mt, i);
j = i + 1;
mas_set(&mas, 0);
rcu_read_lock();
mas_for_each(&mas, entry, ULONG_MAX) {
if (xa_is_zero(entry))
continue;
MT_BUG_ON(mt, entry != xa_mk_value(j));
j++;
}
rcu_read_unlock();
MT_BUG_ON(mt, j != 256);
}
/*MT_BUG_ON(mt, !mtree_empty(mt)); */
}
#if defined(CONFIG_64BIT)
static noinline void check_alloc_rev_range(struct maple_tree *mt)
{
/*
* Generated by:
* cat /proc/self/maps | awk '{print $1}'|
* awk -F "-" '{printf "0x%s, 0x%s, ", $1, $2}'
*/
unsigned long range[] = {
/* Inclusive , Exclusive. */
0x565234af2000, 0x565234af4000,
0x565234af4000, 0x565234af9000,
0x565234af9000, 0x565234afb000,
0x565234afc000, 0x565234afd000,
0x565234afd000, 0x565234afe000,
0x565235def000, 0x565235e10000,
0x7f36d4bfd000, 0x7f36d4ee2000,
0x7f36d4ee2000, 0x7f36d4f04000,
0x7f36d4f04000, 0x7f36d504c000,
0x7f36d504c000, 0x7f36d5098000,
0x7f36d5098000, 0x7f36d5099000,
0x7f36d5099000, 0x7f36d509d000,
0x7f36d509d000, 0x7f36d509f000,
0x7f36d509f000, 0x7f36d50a5000,
0x7f36d50b9000, 0x7f36d50db000,
0x7f36d50db000, 0x7f36d50dc000,
0x7f36d50dc000, 0x7f36d50fa000,
0x7f36d50fa000, 0x7f36d5102000,
0x7f36d5102000, 0x7f36d5103000,
0x7f36d5103000, 0x7f36d5104000,
0x7f36d5104000, 0x7f36d5105000,
0x7fff5876b000, 0x7fff5878d000,
0x7fff5878e000, 0x7fff58791000,
0x7fff58791000, 0x7fff58793000,
};
unsigned long holes[] = {
/*
* Note: start of hole is INCLUSIVE
* end of hole is EXCLUSIVE
* (opposite of the above table.)
* Start of hole, end of hole, size of hole (+1)
*/
0x565234afb000, 0x565234afc000, 0x1000,
0x565234afe000, 0x565235def000, 0x12F1000,
0x565235e10000, 0x7f36d4bfd000, 0x28E49EDED000,
};
/*
* req_range consists of 4 values.
* 1. min index
* 2. max index
* 3. size
* 4. number that should be returned.
* 5. return value
*/
unsigned long req_range[] = {
0x565234af9000, /* Min */
0x7fff58791000, /* Max */
0x1000, /* Size */
0x7fff5878d << 12, /* First rev hole of size 0x1000 */
0, /* Return value success. */
0x0, /* Min */
0x565234AF1 << 12, /* Max */
0x3000, /* Size */
0x565234AEE << 12, /* max - 3. */
0, /* Return value success. */
0x0, /* Min */
-1, /* Max */
0x1000, /* Size */
562949953421311 << 12,/* First rev hole of size 0x1000 */
0, /* Return value success. */
0x0, /* Min */
0x7F36D510A << 12, /* Max */
0x4000, /* Size */
0x7F36D5106 << 12, /* First rev hole of size 0x4000 */
0, /* Return value success. */
/* Ascend test. */
0x0,
34148798629 << 12,
19 << 12,
34148797418 << 12,
0x0,
/* Too big test. */
0x0,
18446744073709551615UL,
562915594369134UL << 12,
0x0,
-EBUSY,
};
int i, range_count = ARRAY_SIZE(range);
int req_range_count = ARRAY_SIZE(req_range);
unsigned long min = 0;
MA_STATE(mas, mt, 0, 0);
mtree_store_range(mt, MTREE_ALLOC_MAX, ULONG_MAX, XA_ZERO_ENTRY,
GFP_KERNEL);
#define DEBUG_REV_RANGE 0
for (i = 0; i < range_count; i += 2) {
/* Inclusive, Inclusive (with the -1) */
#if DEBUG_REV_RANGE
pr_debug("\t%s: Insert %lu-%lu\n", __func__, range[i] >> 12,
(range[i + 1] >> 12) - 1);
#endif
check_insert_range(mt, range[i] >> 12, (range[i + 1] >> 12) - 1,
xa_mk_value(range[i] >> 12), 0);
mt_validate(mt);
}
mas_lock(&mas);
for (i = 0; i < ARRAY_SIZE(holes); i += 3) {
#if DEBUG_REV_RANGE
pr_debug("Search from %lu-%lu for gap %lu should be at %lu\n",
min, holes[i+1]>>12, holes[i+2]>>12,
holes[i] >> 12);
#endif
MT_BUG_ON(mt, mas_empty_area_rev(&mas, min,
holes[i+1] >> 12,
holes[i+2] >> 12));
#if DEBUG_REV_RANGE
pr_debug("Found %lu %lu\n", mas.index, mas.last);
pr_debug("gap %lu %lu\n", (holes[i] >> 12),
(holes[i+1] >> 12));
#endif
MT_BUG_ON(mt, mas.last + 1 != (holes[i+1] >> 12));
MT_BUG_ON(mt, mas.index != (holes[i+1] >> 12) - (holes[i+2] >> 12));
min = holes[i+1] >> 12;
mas_reset(&mas);
}
mas_unlock(&mas);
for (i = 0; i < req_range_count; i += 5) {
#if DEBUG_REV_RANGE
pr_debug("\tReverse request between %lu-%lu size %lu, should get %lu\n",
req_range[i] >> 12,
(req_range[i + 1] >> 12) - 1,
req_range[i+2] >> 12,
req_range[i+3] >> 12);
#endif
check_mtree_alloc_rrange(mt,
req_range[i] >> 12, /* start */
req_range[i+1] >> 12, /* end */
req_range[i+2] >> 12, /* size */
req_range[i+3] >> 12, /* expected address */
req_range[i+4], /* expected return */
xa_mk_value(req_range[i] >> 12)); /* pointer */
mt_validate(mt);
}
mt_set_non_kernel(1);
mtree_erase(mt, 34148798727); /* create a deleted range. */
check_mtree_alloc_rrange(mt, 0, 34359052173, 210253414,
34148798725, 0, mt);
mtree_destroy(mt);
}
static noinline void check_alloc_range(struct maple_tree *mt)
{
/*
* Generated by:
* cat /proc/self/maps|awk '{print $1}'|
* awk -F "-" '{printf "0x%s, 0x%s, ", $1, $2}'
*/
unsigned long range[] = {
/* Inclusive , Exclusive. */
0x565234af2000, 0x565234af4000,
0x565234af4000, 0x565234af9000,
0x565234af9000, 0x565234afb000,
0x565234afc000, 0x565234afd000,
0x565234afd000, 0x565234afe000,
0x565235def000, 0x565235e10000,
0x7f36d4bfd000, 0x7f36d4ee2000,
0x7f36d4ee2000, 0x7f36d4f04000,
0x7f36d4f04000, 0x7f36d504c000,
0x7f36d504c000, 0x7f36d5098000,
0x7f36d5098000, 0x7f36d5099000,
0x7f36d5099000, 0x7f36d509d000,
0x7f36d509d000, 0x7f36d509f000,
0x7f36d509f000, 0x7f36d50a5000,
0x7f36d50b9000, 0x7f36d50db000,
0x7f36d50db000, 0x7f36d50dc000,
0x7f36d50dc000, 0x7f36d50fa000,
0x7f36d50fa000, 0x7f36d5102000,
0x7f36d5102000, 0x7f36d5103000,
0x7f36d5103000, 0x7f36d5104000,
0x7f36d5104000, 0x7f36d5105000,
0x7fff5876b000, 0x7fff5878d000,
0x7fff5878e000, 0x7fff58791000,
0x7fff58791000, 0x7fff58793000,
};
unsigned long holes[] = {
/* Start of hole, end of hole, size of hole (+1) */
0x565234afb000, 0x565234afc000, 0x1000,
0x565234afe000, 0x565235def000, 0x12F1000,
0x565235e10000, 0x7f36d4bfd000, 0x28E49EDED000,
};
/*
* req_range consists of 4 values.
* 1. min index
* 2. max index
* 3. size
* 4. number that should be returned.
* 5. return value
*/
unsigned long req_range[] = {
0x565234af9000, /* Min */
0x7fff58791000, /* Max */
0x1000, /* Size */
0x565234afb000, /* First hole in our data of size 1000. */
0, /* Return value success. */
0x0, /* Min */
0x7fff58791000, /* Max */
0x1F00, /* Size */
0x0, /* First hole in our data of size 2000. */
0, /* Return value success. */
/* Test ascend. */
34148797436 << 12, /* Min */
0x7fff587AF000, /* Max */
0x3000, /* Size */
34148798629 << 12, /* Expected location */
0, /* Return value success. */
/* Test failing. */
34148798623 << 12, /* Min */
34148798683 << 12, /* Max */
0x15000, /* Size */
0, /* Expected location */
-EBUSY, /* Return value failed. */
/* Test filling entire gap. */
34148798623 << 12, /* Min */
0x7fff587AF000, /* Max */
0x10000, /* Size */
34148798632 << 12, /* Expected location */
0, /* Return value success. */
/* Test walking off the end of root. */
0, /* Min */
-1, /* Max */
-1, /* Size */
0, /* Expected location */
-EBUSY, /* Return value failure. */
/* Test looking for too large a hole across entire range. */
0, /* Min */
-1, /* Max */
4503599618982063UL << 12, /* Size */
34359052178 << 12, /* Expected location */
-EBUSY, /* Return failure. */
};
int i, range_count = ARRAY_SIZE(range);
int req_range_count = ARRAY_SIZE(req_range);
unsigned long min = 0x565234af2000;
MA_STATE(mas, mt, 0, 0);
mtree_store_range(mt, MTREE_ALLOC_MAX, ULONG_MAX, XA_ZERO_ENTRY,
GFP_KERNEL);
for (i = 0; i < range_count; i += 2) {
#define DEBUG_ALLOC_RANGE 0
#if DEBUG_ALLOC_RANGE
pr_debug("\tInsert %lu-%lu\n", range[i] >> 12,
(range[i + 1] >> 12) - 1);
mt_dump(mt);
#endif
check_insert_range(mt, range[i] >> 12, (range[i + 1] >> 12) - 1,
xa_mk_value(range[i] >> 12), 0);
mt_validate(mt);
}
mas_lock(&mas);
for (i = 0; i < ARRAY_SIZE(holes); i += 3) {
#if DEBUG_ALLOC_RANGE
pr_debug("\tGet empty %lu-%lu size %lu (%lx-%lx)\n", min >> 12,
holes[i+1] >> 12, holes[i+2] >> 12,
min, holes[i+1]);
#endif
MT_BUG_ON(mt, mas_empty_area(&mas, min >> 12,
holes[i+1] >> 12,
holes[i+2] >> 12));
MT_BUG_ON(mt, mas.index != holes[i] >> 12);
min = holes[i+1];
mas_reset(&mas);
}
mas_unlock(&mas);
for (i = 0; i < req_range_count; i += 5) {
#if DEBUG_ALLOC_RANGE
pr_debug("\tTest %d: %lu-%lu size %lu expected %lu (%lu-%lu)\n",
i/5, req_range[i] >> 12, req_range[i + 1] >> 12,
req_range[i + 2] >> 12, req_range[i + 3] >> 12,
req_range[i], req_range[i+1]);
#endif
check_mtree_alloc_range(mt,
req_range[i] >> 12, /* start */
req_range[i+1] >> 12, /* end */
req_range[i+2] >> 12, /* size */
req_range[i+3] >> 12, /* expected address */
req_range[i+4], /* expected return */
xa_mk_value(req_range[i] >> 12)); /* pointer */
mt_validate(mt);
#if DEBUG_ALLOC_RANGE
mt_dump(mt);
#endif
}
mtree_destroy(mt);
}
#endif
static noinline void check_ranges(struct maple_tree *mt)
{
int i, val, val2;
unsigned long r[] = {
10, 15,
20, 25,
17, 22, /* Overlaps previous range. */
9, 1000, /* Huge. */
100, 200,
45, 168,
118, 128,
};
MT_BUG_ON(mt, !mtree_empty(mt));
check_insert_range(mt, r[0], r[1], xa_mk_value(r[0]), 0);
check_insert_range(mt, r[2], r[3], xa_mk_value(r[2]), 0);
check_insert_range(mt, r[4], r[5], xa_mk_value(r[4]), -EEXIST);
MT_BUG_ON(mt, !mt_height(mt));
/* Store */
check_store_range(mt, r[4], r[5], xa_mk_value(r[4]), 0);
check_store_range(mt, r[6], r[7], xa_mk_value(r[6]), 0);
check_store_range(mt, r[8], r[9], xa_mk_value(r[8]), 0);
MT_BUG_ON(mt, !mt_height(mt));
mtree_destroy(mt);
MT_BUG_ON(mt, mt_height(mt));
check_seq(mt, 50, false);
mt_set_non_kernel(4);
check_store_range(mt, 5, 47, xa_mk_value(47), 0);
MT_BUG_ON(mt, !mt_height(mt));
mtree_destroy(mt);
/* Create tree of 1-100 */
check_seq(mt, 100, false);
/* Store 45-168 */
mt_set_non_kernel(10);
check_store_range(mt, r[10], r[11], xa_mk_value(r[10]), 0);
MT_BUG_ON(mt, !mt_height(mt));
mtree_destroy(mt);
/* Create tree of 1-200 */
check_seq(mt, 200, false);
/* Store 45-168 */
check_store_range(mt, r[10], r[11], xa_mk_value(r[10]), 0);
MT_BUG_ON(mt, !mt_height(mt));
mtree_destroy(mt);
check_seq(mt, 30, false);
check_store_range(mt, 6, 18, xa_mk_value(6), 0);
MT_BUG_ON(mt, !mt_height(mt));
mtree_destroy(mt);
/* Overwrite across multiple levels. */
/* Create tree of 1-400 */
check_seq(mt, 400, false);
mt_set_non_kernel(50);
/* Store 118-128 */
check_store_range(mt, r[12], r[13], xa_mk_value(r[12]), 0);
mt_set_non_kernel(50);
mtree_test_erase(mt, 140);
mtree_test_erase(mt, 141);
mtree_test_erase(mt, 142);
mtree_test_erase(mt, 143);
mtree_test_erase(mt, 130);
mtree_test_erase(mt, 131);
mtree_test_erase(mt, 132);
mtree_test_erase(mt, 133);
mtree_test_erase(mt, 134);
mtree_test_erase(mt, 135);
check_load(mt, r[12], xa_mk_value(r[12]));
check_load(mt, r[13], xa_mk_value(r[12]));
check_load(mt, r[13] - 1, xa_mk_value(r[12]));
check_load(mt, r[13] + 1, xa_mk_value(r[13] + 1));
check_load(mt, 135, NULL);
check_load(mt, 140, NULL);
mt_set_non_kernel(0);
MT_BUG_ON(mt, !mt_height(mt));
mtree_destroy(mt);
/* Overwrite multiple levels at the end of the tree (slot 7) */
mt_set_non_kernel(50);
check_seq(mt, 400, false);
check_store_range(mt, 353, 361, xa_mk_value(353), 0);
check_store_range(mt, 347, 352, xa_mk_value(347), 0);
check_load(mt, 346, xa_mk_value(346));
for (i = 347; i <= 352; i++)
check_load(mt, i, xa_mk_value(347));
for (i = 353; i <= 361; i++)
check_load(mt, i, xa_mk_value(353));
check_load(mt, 362, xa_mk_value(362));
mt_set_non_kernel(0);
MT_BUG_ON(mt, !mt_height(mt));
mtree_destroy(mt);
mt_set_non_kernel(50);
check_seq(mt, 400, false);
check_store_range(mt, 352, 364, NULL, 0);
check_store_range(mt, 351, 363, xa_mk_value(352), 0);
check_load(mt, 350, xa_mk_value(350));
check_load(mt, 351, xa_mk_value(352));
for (i = 352; i <= 363; i++)
check_load(mt, i, xa_mk_value(352));
check_load(mt, 364, NULL);
check_load(mt, 365, xa_mk_value(365));
mt_set_non_kernel(0);
MT_BUG_ON(mt, !mt_height(mt));
mtree_destroy(mt);
mt_set_non_kernel(5);
check_seq(mt, 400, false);
check_store_range(mt, 352, 364, NULL, 0);
check_store_range(mt, 351, 364, xa_mk_value(352), 0);
check_load(mt, 350, xa_mk_value(350));
check_load(mt, 351, xa_mk_value(352));
for (i = 352; i <= 364; i++)
check_load(mt, i, xa_mk_value(352));
check_load(mt, 365, xa_mk_value(365));
mt_set_non_kernel(0);
MT_BUG_ON(mt, !mt_height(mt));
mtree_destroy(mt);
mt_set_non_kernel(50);
check_seq(mt, 400, false);
check_store_range(mt, 362, 367, xa_mk_value(362), 0);
check_store_range(mt, 353, 361, xa_mk_value(353), 0);
mt_set_non_kernel(0);
mt_validate(mt);
MT_BUG_ON(mt, !mt_height(mt));
mtree_destroy(mt);
/*
* Interesting cases:
* 1. Overwrite the end of a node and end in the first entry of the next
* node.
* 2. Split a single range
* 3. Overwrite the start of a range
* 4. Overwrite the end of a range
* 5. Overwrite the entire range
* 6. Overwrite a range that causes multiple parent nodes to be
* combined
* 7. Overwrite a range that causes multiple parent nodes and part of
* root to be combined
* 8. Overwrite the whole tree
* 9. Try to overwrite the zero entry of an alloc tree.
* 10. Write a range larger than a nodes current pivot
*/
mt_set_non_kernel(50);
for (i = 0; i <= 500; i++) {
val = i*5;
val2 = (i+1)*5;
check_store_range(mt, val, val2, xa_mk_value(val), 0);
}
check_store_range(mt, 2400, 2400, xa_mk_value(2400), 0);
check_store_range(mt, 2411, 2411, xa_mk_value(2411), 0);
check_store_range(mt, 2412, 2412, xa_mk_value(2412), 0);
check_store_range(mt, 2396, 2400, xa_mk_value(4052020), 0);
check_store_range(mt, 2402, 2402, xa_mk_value(2402), 0);
mtree_destroy(mt);
mt_set_non_kernel(0);
mt_set_non_kernel(50);
for (i = 0; i <= 500; i++) {
val = i*5;
val2 = (i+1)*5;
check_store_range(mt, val, val2, xa_mk_value(val), 0);
}
check_store_range(mt, 2422, 2422, xa_mk_value(2422), 0);
check_store_range(mt, 2424, 2424, xa_mk_value(2424), 0);
check_store_range(mt, 2425, 2425, xa_mk_value(2), 0);
check_store_range(mt, 2460, 2470, NULL, 0);
check_store_range(mt, 2435, 2460, xa_mk_value(2435), 0);
check_store_range(mt, 2461, 2470, xa_mk_value(2461), 0);
mt_set_non_kernel(0);
MT_BUG_ON(mt, !mt_height(mt));
mtree_destroy(mt);
/* Test rebalance gaps */
mt_init_flags(mt, MT_FLAGS_ALLOC_RANGE);
mt_set_non_kernel(50);
for (i = 0; i <= 50; i++) {
val = i*10;
val2 = (i+1)*10;
check_store_range(mt, val, val2, xa_mk_value(val), 0);
}
check_store_range(mt, 161, 161, xa_mk_value(161), 0);
check_store_range(mt, 162, 162, xa_mk_value(162), 0);
check_store_range(mt, 163, 163, xa_mk_value(163), 0);
check_store_range(mt, 240, 249, NULL, 0);
mtree_erase(mt, 200);
mtree_erase(mt, 210);
mtree_erase(mt, 220);
mtree_erase(mt, 230);
mt_set_non_kernel(0);
MT_BUG_ON(mt, !mt_height(mt));
mtree_destroy(mt);
mt_init_flags(mt, MT_FLAGS_ALLOC_RANGE);
for (i = 0; i <= 500; i++) {
val = i*10;
val2 = (i+1)*10;
check_store_range(mt, val, val2, xa_mk_value(val), 0);
}
check_store_range(mt, 4600, 4959, xa_mk_value(1), 0);
mt_validate(mt);
MT_BUG_ON(mt, !mt_height(mt));
mtree_destroy(mt);
mt_init_flags(mt, MT_FLAGS_ALLOC_RANGE);
for (i = 0; i <= 500; i++) {
val = i*10;
val2 = (i+1)*10;
check_store_range(mt, val, val2, xa_mk_value(val), 0);
}
check_store_range(mt, 4811, 4811, xa_mk_value(4811), 0);
check_store_range(mt, 4812, 4812, xa_mk_value(4812), 0);
check_store_range(mt, 4861, 4861, xa_mk_value(4861), 0);
check_store_range(mt, 4862, 4862, xa_mk_value(4862), 0);
check_store_range(mt, 4842, 4849, NULL, 0);
mt_validate(mt);
MT_BUG_ON(mt, !mt_height(mt));
mtree_destroy(mt);
mt_init_flags(mt, MT_FLAGS_ALLOC_RANGE);
for (i = 0; i <= 1300; i++) {
val = i*10;
val2 = (i+1)*10;
check_store_range(mt, val, val2, xa_mk_value(val), 0);
MT_BUG_ON(mt, mt_height(mt) >= 4);
}
/* Cause a 3 child split all the way up the tree. */
for (i = 5; i < 215; i += 10)
check_store_range(mt, 11450 + i, 11450 + i + 1, NULL, 0);
for (i = 5; i < 65; i += 10)
check_store_range(mt, 11770 + i, 11770 + i + 1, NULL, 0);
MT_BUG_ON(mt, mt_height(mt) >= 4);
for (i = 5; i < 45; i += 10)
check_store_range(mt, 11700 + i, 11700 + i + 1, NULL, 0);
if (!MAPLE_32BIT)
MT_BUG_ON(mt, mt_height(mt) < 4);
mtree_destroy(mt);
mt_init_flags(mt, MT_FLAGS_ALLOC_RANGE);
for (i = 0; i <= 1200; i++) {
val = i*10;
val2 = (i+1)*10;
check_store_range(mt, val, val2, xa_mk_value(val), 0);
MT_BUG_ON(mt, mt_height(mt) >= 4);
}
/* Fill parents and leaves before split. */
for (i = 5; i < 455; i += 10)
check_store_range(mt, 7800 + i, 7800 + i + 1, NULL, 0);
for (i = 1; i < 16; i++)
check_store_range(mt, 8185 + i, 8185 + i + 1,
xa_mk_value(8185+i), 0);
MT_BUG_ON(mt, mt_height(mt) >= 4);
/* triple split across multiple levels. */
check_store_range(mt, 8184, 8184, xa_mk_value(8184), 0);
if (!MAPLE_32BIT)
MT_BUG_ON(mt, mt_height(mt) != 4);
}
static noinline void check_next_entry(struct maple_tree *mt)
{
void *entry = NULL;
unsigned long limit = 30, i = 0;
MA_STATE(mas, mt, i, i);
MT_BUG_ON(mt, !mtree_empty(mt));
check_seq(mt, limit, false);
rcu_read_lock();
/* Check the first one and get ma_state in the correct state. */
MT_BUG_ON(mt, mas_walk(&mas) != xa_mk_value(i++));
for ( ; i <= limit + 1; i++) {
entry = mas_next(&mas, limit);
if (i > limit)
MT_BUG_ON(mt, entry != NULL);
else
MT_BUG_ON(mt, xa_mk_value(i) != entry);
}
rcu_read_unlock();
mtree_destroy(mt);
}
static noinline void check_prev_entry(struct maple_tree *mt)
{
unsigned long index = 16;
void *value;
int i;
MA_STATE(mas, mt, index, index);
MT_BUG_ON(mt, !mtree_empty(mt));
check_seq(mt, 30, false);
rcu_read_lock();
value = mas_find(&mas, ULONG_MAX);
MT_BUG_ON(mt, value != xa_mk_value(index));
value = mas_prev(&mas, 0);
MT_BUG_ON(mt, value != xa_mk_value(index - 1));
rcu_read_unlock();
mtree_destroy(mt);
/* Check limits on prev */
mt_init_flags(mt, MT_FLAGS_ALLOC_RANGE);
mas_lock(&mas);
for (i = 0; i <= index; i++) {
mas_set_range(&mas, i*10, i*10+5);
mas_store_gfp(&mas, xa_mk_value(i), GFP_KERNEL);
}
mas_set(&mas, 20);
value = mas_walk(&mas);
MT_BUG_ON(mt, value != xa_mk_value(2));
value = mas_prev(&mas, 19);
MT_BUG_ON(mt, value != NULL);
mas_set(&mas, 80);
value = mas_walk(&mas);
MT_BUG_ON(mt, value != xa_mk_value(8));
value = mas_prev(&mas, 76);
MT_BUG_ON(mt, value != NULL);
mas_unlock(&mas);
}
static noinline void check_root_expand(struct maple_tree *mt)
{
MA_STATE(mas, mt, 0, 0);
void *ptr;
mas_lock(&mas);
mas_set(&mas, 3);
ptr = mas_walk(&mas);
MT_BUG_ON(mt, ptr != NULL);
MT_BUG_ON(mt, mas.index != 0);
MT_BUG_ON(mt, mas.last != ULONG_MAX);
ptr = &check_prev_entry;
mas_set(&mas, 1);
mas_store_gfp(&mas, ptr, GFP_KERNEL);
mas_set(&mas, 0);
ptr = mas_walk(&mas);
MT_BUG_ON(mt, ptr != NULL);
mas_set(&mas, 1);
ptr = mas_walk(&mas);
MT_BUG_ON(mt, ptr != &check_prev_entry);
mas_set(&mas, 2);
ptr = mas_walk(&mas);
MT_BUG_ON(mt, ptr != NULL);
mas_unlock(&mas);
mtree_destroy(mt);
mt_init_flags(mt, 0);
mas_lock(&mas);
mas_set(&mas, 0);
ptr = &check_prev_entry;
mas_store_gfp(&mas, ptr, GFP_KERNEL);
mas_set(&mas, 5);
ptr = mas_walk(&mas);
MT_BUG_ON(mt, ptr != NULL);
MT_BUG_ON(mt, mas.index != 1);
MT_BUG_ON(mt, mas.last != ULONG_MAX);
mas_set_range(&mas, 0, 100);
ptr = mas_walk(&mas);
MT_BUG_ON(mt, ptr != &check_prev_entry);
MT_BUG_ON(mt, mas.last != 0);
mas_unlock(&mas);
mtree_destroy(mt);
mt_init_flags(mt, 0);
mas_lock(&mas);
mas_set(&mas, 0);
ptr = (void *)((unsigned long) check_prev_entry | 1UL);
mas_store_gfp(&mas, ptr, GFP_KERNEL);
ptr = mas_next(&mas, ULONG_MAX);
MT_BUG_ON(mt, ptr != NULL);
MT_BUG_ON(mt, (mas.index != 1) && (mas.last != ULONG_MAX));
mas_set(&mas, 1);
ptr = mas_prev(&mas, 0);
MT_BUG_ON(mt, (mas.index != 0) && (mas.last != 0));
MT_BUG_ON(mt, ptr != (void *)((unsigned long) check_prev_entry | 1UL));
mas_unlock(&mas);
mtree_destroy(mt);
mt_init_flags(mt, 0);
mas_lock(&mas);
mas_set(&mas, 0);
ptr = (void *)((unsigned long) check_prev_entry | 2UL);
mas_store_gfp(&mas, ptr, GFP_KERNEL);
ptr = mas_next(&mas, ULONG_MAX);
MT_BUG_ON(mt, ptr != NULL);
MT_BUG_ON(mt, (mas.index != 1) && (mas.last != ULONG_MAX));
mas_set(&mas, 1);
ptr = mas_prev(&mas, 0);
MT_BUG_ON(mt, (mas.index != 0) && (mas.last != 0));
MT_BUG_ON(mt, ptr != (void *)((unsigned long) check_prev_entry | 2UL));
mas_unlock(&mas);
}
static noinline void check_gap_combining(struct maple_tree *mt)
{
struct maple_enode *mn1, *mn2;
void *entry;
unsigned long singletons = 100;
unsigned long *seq100;
unsigned long seq100_64[] = {
/* 0-5 */
74, 75, 76,
50, 100, 2,
/* 6-12 */
44, 45, 46, 43,
20, 50, 3,
/* 13-20*/
80, 81, 82,
76, 2, 79, 85, 4,
};
unsigned long seq100_32[] = {
/* 0-5 */
61, 62, 63,
50, 100, 2,
/* 6-12 */
31, 32, 33, 30,
20, 50, 3,
/* 13-20*/
80, 81, 82,
76, 2, 79, 85, 4,
};
unsigned long seq2000[] = {
1152, 1151,
1100, 1200, 2,
};
unsigned long seq400[] = {
286, 318,
256, 260, 266, 270, 275, 280, 290, 398,
286, 310,
};
unsigned long index;
MA_STATE(mas, mt, 0, 0);
if (MAPLE_32BIT)
seq100 = seq100_32;
else
seq100 = seq100_64;
index = seq100[0];
mas_set(&mas, index);
MT_BUG_ON(mt, !mtree_empty(mt));
check_seq(mt, singletons, false); /* create 100 singletons. */
mt_set_non_kernel(1);
mtree_test_erase(mt, seq100[2]);
check_load(mt, seq100[2], NULL);
mtree_test_erase(mt, seq100[1]);
check_load(mt, seq100[1], NULL);
rcu_read_lock();
entry = mas_find(&mas, ULONG_MAX);
MT_BUG_ON(mt, entry != xa_mk_value(index));
mn1 = mas.node;
mas_next(&mas, ULONG_MAX);
entry = mas_next(&mas, ULONG_MAX);
MT_BUG_ON(mt, entry != xa_mk_value(index + 4));
mn2 = mas.node;
MT_BUG_ON(mt, mn1 == mn2); /* test the test. */
/*
* At this point, there is a gap of 2 at index + 1 between seq100[3] and
* seq100[4]. Search for the gap.
*/
mt_set_non_kernel(1);
mas_reset(&mas);
MT_BUG_ON(mt, mas_empty_area_rev(&mas, seq100[3], seq100[4],
seq100[5]));
MT_BUG_ON(mt, mas.index != index + 1);
rcu_read_unlock();
mtree_test_erase(mt, seq100[6]);
check_load(mt, seq100[6], NULL);
mtree_test_erase(mt, seq100[7]);
check_load(mt, seq100[7], NULL);
mtree_test_erase(mt, seq100[8]);
index = seq100[9];
rcu_read_lock();
mas.index = index;
mas.last = index;
mas_reset(&mas);
entry = mas_find(&mas, ULONG_MAX);
MT_BUG_ON(mt, entry != xa_mk_value(index));
mn1 = mas.node;
entry = mas_next(&mas, ULONG_MAX);
MT_BUG_ON(mt, entry != xa_mk_value(index + 4));
mas_next(&mas, ULONG_MAX); /* go to the next entry. */
mn2 = mas.node;
MT_BUG_ON(mt, mn1 == mn2); /* test the next entry is in the next node. */
/*
* At this point, there is a gap of 3 at seq100[6]. Find it by
* searching 20 - 50 for size 3.
*/
mas_reset(&mas);
MT_BUG_ON(mt, mas_empty_area_rev(&mas, seq100[10], seq100[11],
seq100[12]));
MT_BUG_ON(mt, mas.index != seq100[6]);
rcu_read_unlock();
mt_set_non_kernel(1);
mtree_store(mt, seq100[13], NULL, GFP_KERNEL);
check_load(mt, seq100[13], NULL);
check_load(mt, seq100[14], xa_mk_value(seq100[14]));
mtree_store(mt, seq100[14], NULL, GFP_KERNEL);
check_load(mt, seq100[13], NULL);
check_load(mt, seq100[14], NULL);
mas_reset(&mas);
rcu_read_lock();
MT_BUG_ON(mt, mas_empty_area_rev(&mas, seq100[16], seq100[15],
seq100[17]));
MT_BUG_ON(mt, mas.index != seq100[13]);
mt_validate(mt);
rcu_read_unlock();
/*
* *DEPRECATED: no retries anymore* Test retry entry in the start of a
* gap.
*/
mt_set_non_kernel(2);
mtree_test_store_range(mt, seq100[18], seq100[14], NULL);
mtree_test_erase(mt, seq100[15]);
mas_reset(&mas);
rcu_read_lock();
MT_BUG_ON(mt, mas_empty_area_rev(&mas, seq100[16], seq100[19],
seq100[20]));
rcu_read_unlock();
MT_BUG_ON(mt, mas.index != seq100[18]);
mt_validate(mt);
mtree_destroy(mt);
/* seq 2000 tests are for multi-level tree gaps */
mt_init_flags(mt, MT_FLAGS_ALLOC_RANGE);
check_seq(mt, 2000, false);
mt_set_non_kernel(1);
mtree_test_erase(mt, seq2000[0]);
mtree_test_erase(mt, seq2000[1]);
mt_set_non_kernel(2);
mas_reset(&mas);
rcu_read_lock();
MT_BUG_ON(mt, mas_empty_area_rev(&mas, seq2000[2], seq2000[3],
seq2000[4]));
MT_BUG_ON(mt, mas.index != seq2000[1]);
rcu_read_unlock();
mt_validate(mt);
mtree_destroy(mt);
/* seq 400 tests rebalancing over two levels. */
mt_set_non_kernel(99);
mt_init_flags(mt, MT_FLAGS_ALLOC_RANGE);
check_seq(mt, 400, false);
mtree_test_store_range(mt, seq400[0], seq400[1], NULL);
mt_set_non_kernel(0);
mtree_destroy(mt);
mt_init_flags(mt, MT_FLAGS_ALLOC_RANGE);
check_seq(mt, 400, false);
mt_set_non_kernel(50);
mtree_test_store_range(mt, seq400[2], seq400[9],
xa_mk_value(seq400[2]));
mtree_test_store_range(mt, seq400[3], seq400[9],
xa_mk_value(seq400[3]));
mtree_test_store_range(mt, seq400[4], seq400[9],
xa_mk_value(seq400[4]));
mtree_test_store_range(mt, seq400[5], seq400[9],
xa_mk_value(seq400[5]));
mtree_test_store_range(mt, seq400[0], seq400[9],
xa_mk_value(seq400[0]));
mtree_test_store_range(mt, seq400[6], seq400[9],
xa_mk_value(seq400[6]));
mtree_test_store_range(mt, seq400[7], seq400[9],
xa_mk_value(seq400[7]));
mtree_test_store_range(mt, seq400[8], seq400[9],
xa_mk_value(seq400[8]));
mtree_test_store_range(mt, seq400[10], seq400[11],
xa_mk_value(seq400[10]));
mt_validate(mt);
mt_set_non_kernel(0);
mtree_destroy(mt);
}
static noinline void check_node_overwrite(struct maple_tree *mt)
{
int i, max = 4000;
for (i = 0; i < max; i++)
mtree_test_store_range(mt, i*100, i*100 + 50, xa_mk_value(i*100));
mtree_test_store_range(mt, 319951, 367950, NULL);
/*mt_dump(mt); */
mt_validate(mt);
}
#if defined(BENCH_SLOT_STORE)
static noinline void bench_slot_store(struct maple_tree *mt)
{
int i, brk = 105, max = 1040, brk_start = 100, count = 20000000;
for (i = 0; i < max; i += 10)
mtree_store_range(mt, i, i + 5, xa_mk_value(i), GFP_KERNEL);
for (i = 0; i < count; i++) {
mtree_store_range(mt, brk, brk, NULL, GFP_KERNEL);
mtree_store_range(mt, brk_start, brk, xa_mk_value(brk),
GFP_KERNEL);
}
}
#endif
#if defined(BENCH_NODE_STORE)
static noinline void bench_node_store(struct maple_tree *mt)
{
int i, overwrite = 76, max = 240, count = 20000000;
for (i = 0; i < max; i += 10)
mtree_store_range(mt, i, i + 5, xa_mk_value(i), GFP_KERNEL);
for (i = 0; i < count; i++) {
mtree_store_range(mt, overwrite, overwrite + 15,
xa_mk_value(overwrite), GFP_KERNEL);
overwrite += 5;
if (overwrite >= 135)
overwrite = 76;
}
}
#endif
#if defined(BENCH_AWALK)
static noinline void bench_awalk(struct maple_tree *mt)
{
int i, max = 2500, count = 50000000;
MA_STATE(mas, mt, 1470, 1470);
for (i = 0; i < max; i += 10)
mtree_store_range(mt, i, i + 5, xa_mk_value(i), GFP_KERNEL);
mtree_store_range(mt, 1470, 1475, NULL, GFP_KERNEL);
for (i = 0; i < count; i++) {
mas_empty_area_rev(&mas, 0, 2000, 10);
mas_reset(&mas);
}
}
#endif
#if defined(BENCH_WALK)
static noinline void bench_walk(struct maple_tree *mt)
{
int i, max = 2500, count = 550000000;
MA_STATE(mas, mt, 1470, 1470);
for (i = 0; i < max; i += 10)
mtree_store_range(mt, i, i + 5, xa_mk_value(i), GFP_KERNEL);
for (i = 0; i < count; i++) {
mas_walk(&mas);
mas_reset(&mas);
}
}
#endif
#if defined(BENCH_MT_FOR_EACH)
static noinline void bench_mt_for_each(struct maple_tree *mt)
{
int i, count = 1000000;
unsigned long max = 2500, index = 0;
void *entry;
for (i = 0; i < max; i += 5)
mtree_store_range(mt, i, i + 4, xa_mk_value(i), GFP_KERNEL);
for (i = 0; i < count; i++) {
unsigned long j = 0;
mt_for_each(mt, entry, index, max) {
MT_BUG_ON(mt, entry != xa_mk_value(j));
j += 5;
}
index = 0;
}
}
#endif
/* check_forking - simulate the kernel forking sequence with the tree. */
static noinline void check_forking(struct maple_tree *mt)
{
struct maple_tree newmt;
int i, nr_entries = 134;
void *val;
MA_STATE(mas, mt, 0, 0);
MA_STATE(newmas, mt, 0, 0);
for (i = 0; i <= nr_entries; i++)
mtree_store_range(mt, i*10, i*10 + 5,
xa_mk_value(i), GFP_KERNEL);
mt_set_non_kernel(99999);
mt_init_flags(&newmt, MT_FLAGS_ALLOC_RANGE);
newmas.tree = &newmt;
mas_reset(&newmas);
mas_reset(&mas);
mas_lock(&newmas);
mas.index = 0;
mas.last = 0;
if (mas_expected_entries(&newmas, nr_entries)) {
pr_err("OOM!");
BUG_ON(1);
}
rcu_read_lock();
mas_for_each(&mas, val, ULONG_MAX) {
newmas.index = mas.index;
newmas.last = mas.last;
mas_store(&newmas, val);
}
rcu_read_unlock();
mas_destroy(&newmas);
mas_unlock(&newmas);
mt_validate(&newmt);
mt_set_non_kernel(0);
mtree_destroy(&newmt);
}
static noinline void check_mas_store_gfp(struct maple_tree *mt)
{
struct maple_tree newmt;
int i, nr_entries = 135;
void *val;
MA_STATE(mas, mt, 0, 0);
MA_STATE(newmas, mt, 0, 0);
for (i = 0; i <= nr_entries; i++)
mtree_store_range(mt, i*10, i*10 + 5,
xa_mk_value(i), GFP_KERNEL);
mt_set_non_kernel(99999);
mt_init_flags(&newmt, MT_FLAGS_ALLOC_RANGE);
newmas.tree = &newmt;
rcu_read_lock();
mas_lock(&newmas);
mas_reset(&newmas);
mas_set(&mas, 0);
mas_for_each(&mas, val, ULONG_MAX) {
newmas.index = mas.index;
newmas.last = mas.last;
mas_store_gfp(&newmas, val, GFP_KERNEL);
}
mas_unlock(&newmas);
rcu_read_unlock();
mt_validate(&newmt);
mt_set_non_kernel(0);
mtree_destroy(&newmt);
}
#if defined(BENCH_FORK)
static noinline void bench_forking(struct maple_tree *mt)
{
struct maple_tree newmt;
int i, nr_entries = 134, nr_fork = 80000;
void *val;
MA_STATE(mas, mt, 0, 0);
MA_STATE(newmas, mt, 0, 0);
for (i = 0; i <= nr_entries; i++)
mtree_store_range(mt, i*10, i*10 + 5,
xa_mk_value(i), GFP_KERNEL);
for (i = 0; i < nr_fork; i++) {
mt_set_non_kernel(99999);
mt_init_flags(&newmt, MT_FLAGS_ALLOC_RANGE);
newmas.tree = &newmt;
mas_reset(&newmas);
mas_reset(&mas);
mas.index = 0;
mas.last = 0;
rcu_read_lock();
mas_lock(&newmas);
if (mas_expected_entries(&newmas, nr_entries)) {
printk("OOM!");
BUG_ON(1);
}
mas_for_each(&mas, val, ULONG_MAX) {
newmas.index = mas.index;
newmas.last = mas.last;
mas_store(&newmas, val);
}
mas_destroy(&newmas);
mas_unlock(&newmas);
rcu_read_unlock();
mt_validate(&newmt);
mt_set_non_kernel(0);
mtree_destroy(&newmt);
}
}
#endif
static noinline void next_prev_test(struct maple_tree *mt)
{
int i, nr_entries;
void *val;
MA_STATE(mas, mt, 0, 0);
struct maple_enode *mn;
unsigned long *level2;
unsigned long level2_64[] = {707, 1000, 710, 715, 720, 725};
unsigned long level2_32[] = {1747, 2000, 1750, 1755, 1760, 1765};
if (MAPLE_32BIT) {
nr_entries = 500;
level2 = level2_32;
} else {
nr_entries = 200;
level2 = level2_64;
}
for (i = 0; i <= nr_entries; i++)
mtree_store_range(mt, i*10, i*10 + 5,
xa_mk_value(i), GFP_KERNEL);
mas_lock(&mas);
for (i = 0; i <= nr_entries / 2; i++) {
mas_next(&mas, 1000);
if (mas_is_none(&mas))
break;
}
mas_reset(&mas);
mas_set(&mas, 0);
i = 0;
mas_for_each(&mas, val, 1000) {
i++;
}
mas_reset(&mas);
mas_set(&mas, 0);
i = 0;
mas_for_each(&mas, val, 1000) {
mas_pause(&mas);
i++;
}
/*
* 680 - 685 = 0x61a00001930c
* 686 - 689 = NULL;
* 690 - 695 = 0x61a00001930c
* Check simple next/prev
*/
mas_set(&mas, 686);
val = mas_walk(&mas);
MT_BUG_ON(mt, val != NULL);
val = mas_next(&mas, 1000);
MT_BUG_ON(mt, val != xa_mk_value(690 / 10));
MT_BUG_ON(mt, mas.index != 690);
MT_BUG_ON(mt, mas.last != 695);
val = mas_prev(&mas, 0);
MT_BUG_ON(mt, val != xa_mk_value(680 / 10));
MT_BUG_ON(mt, mas.index != 680);
MT_BUG_ON(mt, mas.last != 685);
val = mas_next(&mas, 1000);
MT_BUG_ON(mt, val != xa_mk_value(690 / 10));
MT_BUG_ON(mt, mas.index != 690);
MT_BUG_ON(mt, mas.last != 695);
val = mas_next(&mas, 1000);
MT_BUG_ON(mt, val != xa_mk_value(700 / 10));
MT_BUG_ON(mt, mas.index != 700);
MT_BUG_ON(mt, mas.last != 705);
/* Check across node boundaries of the tree */
mas_set(&mas, 70);
val = mas_walk(&mas);
MT_BUG_ON(mt, val != xa_mk_value(70 / 10));
MT_BUG_ON(mt, mas.index != 70);
MT_BUG_ON(mt, mas.last != 75);
val = mas_next(&mas, 1000);
MT_BUG_ON(mt, val != xa_mk_value(80 / 10));
MT_BUG_ON(mt, mas.index != 80);
MT_BUG_ON(mt, mas.last != 85);
val = mas_prev(&mas, 70);
MT_BUG_ON(mt, val != xa_mk_value(70 / 10));
MT_BUG_ON(mt, mas.index != 70);
MT_BUG_ON(mt, mas.last != 75);
/* Check across two levels of the tree */
mas_reset(&mas);
mas_set(&mas, level2[0]);
val = mas_walk(&mas);
MT_BUG_ON(mt, val != NULL);
val = mas_next(&mas, level2[1]);
MT_BUG_ON(mt, val != xa_mk_value(level2[2] / 10));
MT_BUG_ON(mt, mas.index != level2[2]);
MT_BUG_ON(mt, mas.last != level2[3]);
mn = mas.node;
val = mas_next(&mas, level2[1]);
MT_BUG_ON(mt, val != xa_mk_value(level2[4] / 10));
MT_BUG_ON(mt, mas.index != level2[4]);
MT_BUG_ON(mt, mas.last != level2[5]);
MT_BUG_ON(mt, mn == mas.node);
val = mas_prev(&mas, 0);
MT_BUG_ON(mt, val != xa_mk_value(level2[2] / 10));
MT_BUG_ON(mt, mas.index != level2[2]);
MT_BUG_ON(mt, mas.last != level2[3]);
/* Check running off the end and back on */
mas_set(&mas, nr_entries * 10);
val = mas_walk(&mas);
MT_BUG_ON(mt, val != xa_mk_value(nr_entries));
MT_BUG_ON(mt, mas.index != (nr_entries * 10));
MT_BUG_ON(mt, mas.last != (nr_entries * 10 + 5));
val = mas_next(&mas, ULONG_MAX);
MT_BUG_ON(mt, val != NULL);
MT_BUG_ON(mt, mas.index != ULONG_MAX);
MT_BUG_ON(mt, mas.last != ULONG_MAX);
val = mas_prev(&mas, 0);
MT_BUG_ON(mt, val != xa_mk_value(nr_entries));
MT_BUG_ON(mt, mas.index != (nr_entries * 10));
MT_BUG_ON(mt, mas.last != (nr_entries * 10 + 5));
/* Check running off the start and back on */
mas_reset(&mas);
mas_set(&mas, 10);
val = mas_walk(&mas);
MT_BUG_ON(mt, val != xa_mk_value(1));
MT_BUG_ON(mt, mas.index != 10);
MT_BUG_ON(mt, mas.last != 15);
val = mas_prev(&mas, 0);
MT_BUG_ON(mt, val != xa_mk_value(0));
MT_BUG_ON(mt, mas.index != 0);
MT_BUG_ON(mt, mas.last != 5);
val = mas_prev(&mas, 0);
MT_BUG_ON(mt, val != NULL);
MT_BUG_ON(mt, mas.index != 0);
MT_BUG_ON(mt, mas.last != 0);
mas.index = 0;
mas.last = 5;
mas_store(&mas, NULL);
mas_reset(&mas);
mas_set(&mas, 10);
mas_walk(&mas);
val = mas_prev(&mas, 0);
MT_BUG_ON(mt, val != NULL);
MT_BUG_ON(mt, mas.index != 0);
MT_BUG_ON(mt, mas.last != 0);
mas_unlock(&mas);
mtree_destroy(mt);
mt_init(mt);
mtree_store_range(mt, 0, 0, xa_mk_value(0), GFP_KERNEL);
mtree_store_range(mt, 5, 5, xa_mk_value(5), GFP_KERNEL);
rcu_read_lock();
mas_set(&mas, 5);
val = mas_prev(&mas, 4);
MT_BUG_ON(mt, val != NULL);
rcu_read_unlock();
}
/* Test spanning writes that require balancing right sibling or right cousin */
static noinline void check_spanning_relatives(struct maple_tree *mt)
{
unsigned long i, nr_entries = 1000;
for (i = 0; i <= nr_entries; i++)
mtree_store_range(mt, i*10, i*10 + 5,
xa_mk_value(i), GFP_KERNEL);
mtree_store_range(mt, 9365, 9955, NULL, GFP_KERNEL);
}
static noinline void check_fuzzer(struct maple_tree *mt)
{
/*
* 1. Causes a spanning rebalance of a single root node.
* Fixed by setting the correct limit in mast_cp_to_nodes() when the
* entire right side is consumed.
*/
mtree_test_insert(mt, 88, (void *)0xb1);
mtree_test_insert(mt, 84, (void *)0xa9);
mtree_test_insert(mt, 2, (void *)0x5);
mtree_test_insert(mt, 4, (void *)0x9);
mtree_test_insert(mt, 14, (void *)0x1d);
mtree_test_insert(mt, 7, (void *)0xf);
mtree_test_insert(mt, 12, (void *)0x19);
mtree_test_insert(mt, 18, (void *)0x25);
mtree_test_store_range(mt, 8, 18, (void *)0x11);
mtree_destroy(mt);
/*
* 2. Cause a spanning rebalance of two nodes in root.
* Fixed by setting mast->r->max correctly.
*/
mt_init_flags(mt, 0);
mtree_test_store(mt, 87, (void *)0xaf);
mtree_test_store(mt, 0, (void *)0x1);
mtree_test_load(mt, 4);
mtree_test_insert(mt, 4, (void *)0x9);
mtree_test_store(mt, 8, (void *)0x11);
mtree_test_store(mt, 44, (void *)0x59);
mtree_test_store(mt, 68, (void *)0x89);
mtree_test_store(mt, 2, (void *)0x5);
mtree_test_insert(mt, 43, (void *)0x57);
mtree_test_insert(mt, 24, (void *)0x31);
mtree_test_insert(mt, 844, (void *)0x699);
mtree_test_store(mt, 84, (void *)0xa9);
mtree_test_store(mt, 4, (void *)0x9);
mtree_test_erase(mt, 4);
mtree_test_load(mt, 5);
mtree_test_erase(mt, 0);
mtree_destroy(mt);
/*
* 3. Cause a node overflow on copy
* Fixed by using the correct check for node size in mas_wr_modify()
* Also discovered issue with metadata setting.
*/
mt_init_flags(mt, 0);
mtree_test_store_range(mt, 0, ULONG_MAX, (void *)0x1);
mtree_test_store(mt, 4, (void *)0x9);
mtree_test_erase(mt, 5);
mtree_test_erase(mt, 0);
mtree_test_erase(mt, 4);
mtree_test_store(mt, 5, (void *)0xb);
mtree_test_erase(mt, 5);
mtree_test_store(mt, 5, (void *)0xb);
mtree_test_erase(mt, 5);
mtree_test_erase(mt, 4);
mtree_test_store(mt, 4, (void *)0x9);
mtree_test_store(mt, 444, (void *)0x379);
mtree_test_store(mt, 0, (void *)0x1);
mtree_test_load(mt, 0);
mtree_test_store(mt, 5, (void *)0xb);
mtree_test_erase(mt, 0);
mtree_destroy(mt);
/*
* 4. spanning store failure due to writing incorrect pivot value at
* last slot.
* Fixed by setting mast->r->max correctly in mast_cp_to_nodes()
*
*/
mt_init_flags(mt, 0);
mtree_test_insert(mt, 261, (void *)0x20b);
mtree_test_store(mt, 516, (void *)0x409);
mtree_test_store(mt, 6, (void *)0xd);
mtree_test_insert(mt, 5, (void *)0xb);
mtree_test_insert(mt, 1256, (void *)0x9d1);
mtree_test_store(mt, 4, (void *)0x9);
mtree_test_erase(mt, 1);
mtree_test_store(mt, 56, (void *)0x71);
mtree_test_insert(mt, 1, (void *)0x3);
mtree_test_store(mt, 24, (void *)0x31);
mtree_test_erase(mt, 1);
mtree_test_insert(mt, 2263, (void *)0x11af);
mtree_test_insert(mt, 446, (void *)0x37d);
mtree_test_store_range(mt, 6, 45, (void *)0xd);
mtree_test_store_range(mt, 3, 446, (void *)0x7);
mtree_destroy(mt);
/*
* 5. mas_wr_extend_null() may overflow slots.
* Fix by checking against wr_mas->node_end.
*/
mt_init_flags(mt, 0);
mtree_test_store(mt, 48, (void *)0x61);
mtree_test_store(mt, 3, (void *)0x7);
mtree_test_load(mt, 0);
mtree_test_store(mt, 88, (void *)0xb1);
mtree_test_store(mt, 81, (void *)0xa3);
mtree_test_insert(mt, 0, (void *)0x1);
mtree_test_insert(mt, 8, (void *)0x11);
mtree_test_insert(mt, 4, (void *)0x9);
mtree_test_insert(mt, 2480, (void *)0x1361);
mtree_test_insert(mt, ULONG_MAX,
(void *)0xffffffffffffffff);
mtree_test_erase(mt, ULONG_MAX);
mtree_destroy(mt);
/*
* 6. When reusing a node with an implied pivot and the node is
* shrinking, old data would be left in the implied slot
* Fixed by checking the last pivot for the mas->max and clear
* accordingly. This only affected the left-most node as that node is
* the only one allowed to end in NULL.
*/
mt_init_flags(mt, 0);
mtree_test_erase(mt, 3);
mtree_test_insert(mt, 22, (void *)0x2d);
mtree_test_insert(mt, 15, (void *)0x1f);
mtree_test_load(mt, 2);
mtree_test_insert(mt, 1, (void *)0x3);
mtree_test_insert(mt, 1, (void *)0x3);
mtree_test_insert(mt, 5, (void *)0xb);
mtree_test_erase(mt, 1);
mtree_test_insert(mt, 1, (void *)0x3);
mtree_test_insert(mt, 4, (void *)0x9);
mtree_test_insert(mt, 1, (void *)0x3);
mtree_test_erase(mt, 1);
mtree_test_insert(mt, 2, (void *)0x5);
mtree_test_insert(mt, 1, (void *)0x3);
mtree_test_erase(mt, 3);
mtree_test_insert(mt, 22, (void *)0x2d);
mtree_test_insert(mt, 15, (void *)0x1f);
mtree_test_insert(mt, 2, (void *)0x5);
mtree_test_insert(mt, 1, (void *)0x3);
mtree_test_insert(mt, 8, (void *)0x11);
mtree_test_load(mt, 2);
mtree_test_insert(mt, 1, (void *)0x3);
mtree_test_insert(mt, 1, (void *)0x3);
mtree_test_store(mt, 1, (void *)0x3);
mtree_test_insert(mt, 5, (void *)0xb);
mtree_test_erase(mt, 1);
mtree_test_insert(mt, 1, (void *)0x3);
mtree_test_insert(mt, 4, (void *)0x9);
mtree_test_insert(mt, 1, (void *)0x3);
mtree_test_erase(mt, 1);
mtree_test_insert(mt, 2, (void *)0x5);
mtree_test_insert(mt, 1, (void *)0x3);
mtree_test_erase(mt, 3);
mtree_test_insert(mt, 22, (void *)0x2d);
mtree_test_insert(mt, 15, (void *)0x1f);
mtree_test_insert(mt, 2, (void *)0x5);
mtree_test_insert(mt, 1, (void *)0x3);
mtree_test_insert(mt, 8, (void *)0x11);
mtree_test_insert(mt, 12, (void *)0x19);
mtree_test_erase(mt, 1);
mtree_test_store_range(mt, 4, 62, (void *)0x9);
mtree_test_erase(mt, 62);
mtree_test_store_range(mt, 1, 0, (void *)0x3);
mtree_test_insert(mt, 11, (void *)0x17);
mtree_test_insert(mt, 3, (void *)0x7);
mtree_test_insert(mt, 3, (void *)0x7);
mtree_test_store(mt, 62, (void *)0x7d);
mtree_test_erase(mt, 62);
mtree_test_store_range(mt, 1, 15, (void *)0x3);
mtree_test_erase(mt, 1);
mtree_test_insert(mt, 22, (void *)0x2d);
mtree_test_insert(mt, 12, (void *)0x19);
mtree_test_erase(mt, 1);
mtree_test_insert(mt, 3, (void *)0x7);
mtree_test_store(mt, 62, (void *)0x7d);
mtree_test_erase(mt, 62);
mtree_test_insert(mt, 122, (void *)0xf5);
mtree_test_store(mt, 3, (void *)0x7);
mtree_test_insert(mt, 0, (void *)0x1);
mtree_test_store_range(mt, 0, 1, (void *)0x1);
mtree_test_insert(mt, 85, (void *)0xab);
mtree_test_insert(mt, 72, (void *)0x91);
mtree_test_insert(mt, 81, (void *)0xa3);
mtree_test_insert(mt, 726, (void *)0x5ad);
mtree_test_insert(mt, 0, (void *)0x1);
mtree_test_insert(mt, 1, (void *)0x3);
mtree_test_store(mt, 51, (void *)0x67);
mtree_test_insert(mt, 611, (void *)0x4c7);
mtree_test_insert(mt, 485, (void *)0x3cb);
mtree_test_insert(mt, 1, (void *)0x3);
mtree_test_erase(mt, 1);
mtree_test_insert(mt, 0, (void *)0x1);
mtree_test_insert(mt, 1, (void *)0x3);
mtree_test_insert_range(mt, 26, 1, (void *)0x35);
mtree_test_load(mt, 1);
mtree_test_store_range(mt, 1, 22, (void *)0x3);
mtree_test_insert(mt, 1, (void *)0x3);
mtree_test_erase(mt, 1);
mtree_test_load(mt, 53);
mtree_test_load(mt, 1);
mtree_test_store_range(mt, 1, 1, (void *)0x3);
mtree_test_insert(mt, 222, (void *)0x1bd);
mtree_test_insert(mt, 485, (void *)0x3cb);
mtree_test_insert(mt, 1, (void *)0x3);
mtree_test_erase(mt, 1);
mtree_test_load(mt, 0);
mtree_test_insert(mt, 21, (void *)0x2b);
mtree_test_insert(mt, 3, (void *)0x7);
mtree_test_store(mt, 621, (void *)0x4db);
mtree_test_insert(mt, 0, (void *)0x1);
mtree_test_erase(mt, 5);
mtree_test_insert(mt, 1, (void *)0x3);
mtree_test_store(mt, 62, (void *)0x7d);
mtree_test_erase(mt, 62);
mtree_test_store_range(mt, 1, 0, (void *)0x3);
mtree_test_insert(mt, 22, (void *)0x2d);
mtree_test_insert(mt, 12, (void *)0x19);
mtree_test_erase(mt, 1);
mtree_test_insert(mt, 1, (void *)0x3);
mtree_test_store_range(mt, 4, 62, (void *)0x9);
mtree_test_erase(mt, 62);
mtree_test_erase(mt, 1);
mtree_test_load(mt, 1);
mtree_test_store_range(mt, 1, 22, (void *)0x3);
mtree_test_insert(mt, 1, (void *)0x3);
mtree_test_erase(mt, 1);
mtree_test_load(mt, 53);
mtree_test_load(mt, 1);
mtree_test_store_range(mt, 1, 1, (void *)0x3);
mtree_test_insert(mt, 222, (void *)0x1bd);
mtree_test_insert(mt, 485, (void *)0x3cb);
mtree_test_insert(mt, 1, (void *)0x3);
mtree_test_erase(mt, 1);
mtree_test_insert(mt, 1, (void *)0x3);
mtree_test_load(mt, 0);
mtree_test_load(mt, 0);
mtree_destroy(mt);
/*
* 7. Previous fix was incomplete, fix mas_resuse_node() clearing of old
* data by overwriting it first - that way metadata is of no concern.
*/
mt_init_flags(mt, 0);
mtree_test_load(mt, 1);
mtree_test_insert(mt, 102, (void *)0xcd);
mtree_test_erase(mt, 2);
mtree_test_erase(mt, 0);
mtree_test_load(mt, 0);
mtree_test_insert(mt, 4, (void *)0x9);
mtree_test_insert(mt, 2, (void *)0x5);
mtree_test_insert(mt, 110, (void *)0xdd);
mtree_test_insert(mt, 1, (void *)0x3);
mtree_test_insert_range(mt, 5, 0, (void *)0xb);
mtree_test_erase(mt, 2);
mtree_test_store(mt, 0, (void *)0x1);
mtree_test_store(mt, 112, (void *)0xe1);
mtree_test_insert(mt, 21, (void *)0x2b);
mtree_test_store(mt, 1, (void *)0x3);
mtree_test_insert_range(mt, 110, 2, (void *)0xdd);
mtree_test_store(mt, 2, (void *)0x5);
mtree_test_load(mt, 22);
mtree_test_erase(mt, 2);
mtree_test_store(mt, 210, (void *)0x1a5);
mtree_test_store_range(mt, 0, 2, (void *)0x1);
mtree_test_store(mt, 2, (void *)0x5);
mtree_test_erase(mt, 2);
mtree_test_erase(mt, 22);
mtree_test_erase(mt, 1);
mtree_test_erase(mt, 2);
mtree_test_store(mt, 0, (void *)0x1);
mtree_test_load(mt, 112);
mtree_test_insert(mt, 2, (void *)0x5);
mtree_test_erase(mt, 2);
mtree_test_store(mt, 1, (void *)0x3);
mtree_test_insert_range(mt, 1, 2, (void *)0x3);
mtree_test_erase(mt, 0);
mtree_test_erase(mt, 2);
mtree_test_store(mt, 2, (void *)0x5);
mtree_test_erase(mt, 0);
mtree_test_erase(mt, 2);
mtree_test_store(mt, 0, (void *)0x1);
mtree_test_store(mt, 0, (void *)0x1);
mtree_test_erase(mt, 2);
mtree_test_store(mt, 2, (void *)0x5);
mtree_test_erase(mt, 2);
mtree_test_insert(mt, 2, (void *)0x5);
mtree_test_insert_range(mt, 1, 2, (void *)0x3);
mtree_test_erase(mt, 0);
mtree_test_erase(mt, 2);
mtree_test_store(mt, 0, (void *)0x1);
mtree_test_load(mt, 112);
mtree_test_store_range(mt, 110, 12, (void *)0xdd);
mtree_test_store(mt, 2, (void *)0x5);
mtree_test_load(mt, 110);
mtree_test_insert_range(mt, 4, 71, (void *)0x9);
mtree_test_load(mt, 2);
mtree_test_store(mt, 2, (void *)0x5);
mtree_test_insert_range(mt, 11, 22, (void *)0x17);
mtree_test_erase(mt, 12);
mtree_test_store(mt, 2, (void *)0x5);
mtree_test_load(mt, 22);
mtree_destroy(mt);
/*
* 8. When rebalancing or spanning_rebalance(), the max of the new node
* may be set incorrectly to the final pivot and not the right max.
* Fix by setting the left max to orig right max if the entire node is
* consumed.
*/
mt_init_flags(mt, 0);
mtree_test_store(mt, 6, (void *)0xd);
mtree_test_store(mt, 67, (void *)0x87);
mtree_test_insert(mt, 15, (void *)0x1f);
mtree_test_insert(mt, 6716, (void *)0x3479);
mtree_test_store(mt, 61, (void *)0x7b);
mtree_test_insert(mt, 13, (void *)0x1b);
mtree_test_store(mt, 8, (void *)0x11);
mtree_test_insert(mt, 1, (void *)0x3);
mtree_test_load(mt, 0);
mtree_test_erase(mt, 67167);
mtree_test_insert_range(mt, 6, 7167, (void *)0xd);
mtree_test_insert(mt, 6, (void *)0xd);
mtree_test_erase(mt, 67);
mtree_test_insert(mt, 1, (void *)0x3);
mtree_test_erase(mt, 667167);
mtree_test_insert(mt, 6, (void *)0xd);
mtree_test_store(mt, 67, (void *)0x87);
mtree_test_insert(mt, 5, (void *)0xb);
mtree_test_erase(mt, 1);
mtree_test_insert(mt, 6, (void *)0xd);
mtree_test_erase(mt, 67);
mtree_test_insert(mt, 15, (void *)0x1f);
mtree_test_insert(mt, 67167, (void *)0x20cbf);
mtree_test_insert(mt, 1, (void *)0x3);
mtree_test_load(mt, 7);
mtree_test_insert(mt, 16, (void *)0x21);
mtree_test_insert(mt, 36, (void *)0x49);
mtree_test_store(mt, 67, (void *)0x87);
mtree_test_store(mt, 6, (void *)0xd);
mtree_test_insert(mt, 367, (void *)0x2df);
mtree_test_insert(mt, 115, (void *)0xe7);
mtree_test_store(mt, 0, (void *)0x1);
mtree_test_store_range(mt, 1, 3, (void *)0x3);
mtree_test_store(mt, 1, (void *)0x3);
mtree_test_erase(mt, 67167);
mtree_test_insert_range(mt, 6, 47, (void *)0xd);
mtree_test_store(mt, 1, (void *)0x3);
mtree_test_insert_range(mt, 1, 67, (void *)0x3);
mtree_test_load(mt, 67);
mtree_test_insert(mt, 1, (void *)0x3);
mtree_test_erase(mt, 67167);
mtree_destroy(mt);
/*
* 9. spanning store to the end of data caused an invalid metadata
* length which resulted in a crash eventually.
* Fix by checking if there is a value in pivot before incrementing the
* metadata end in mab_mas_cp(). To ensure this doesn't happen again,
* abstract the two locations this happens into a function called
* mas_leaf_set_meta().
*/
mt_init_flags(mt, 0);
mtree_test_insert(mt, 21, (void *)0x2b);
mtree_test_insert(mt, 12, (void *)0x19);
mtree_test_insert(mt, 6, (void *)0xd);
mtree_test_insert(mt, 8, (void *)0x11);
mtree_test_insert(mt, 2, (void *)0x5);
mtree_test_insert(mt, 91, (void *)0xb7);
mtree_test_insert(mt, 18, (void *)0x25);
mtree_test_insert(mt, 81, (void *)0xa3);
mtree_test_store_range(mt, 0, 128, (void *)0x1);
mtree_test_store(mt, 1, (void *)0x3);
mtree_test_erase(mt, 8);
mtree_test_insert(mt, 11, (void *)0x17);
mtree_test_insert(mt, 8, (void *)0x11);
mtree_test_insert(mt, 21, (void *)0x2b);
mtree_test_insert(mt, 2, (void *)0x5);
mtree_test_insert(mt, ULONG_MAX - 10, (void *)0xffffffffffffffeb);
mtree_test_erase(mt, ULONG_MAX - 10);
mtree_test_store_range(mt, 0, 281, (void *)0x1);
mtree_test_erase(mt, 2);
mtree_test_insert(mt, 1211, (void *)0x977);
mtree_test_insert(mt, 111, (void *)0xdf);
mtree_test_insert(mt, 13, (void *)0x1b);
mtree_test_insert(mt, 211, (void *)0x1a7);
mtree_test_insert(mt, 11, (void *)0x17);
mtree_test_insert(mt, 5, (void *)0xb);
mtree_test_insert(mt, 1218, (void *)0x985);
mtree_test_insert(mt, 61, (void *)0x7b);
mtree_test_store(mt, 1, (void *)0x3);
mtree_test_insert(mt, 121, (void *)0xf3);
mtree_test_insert(mt, 8, (void *)0x11);
mtree_test_insert(mt, 21, (void *)0x2b);
mtree_test_insert(mt, 2, (void *)0x5);
mtree_test_insert(mt, ULONG_MAX - 10, (void *)0xffffffffffffffeb);
mtree_test_erase(mt, ULONG_MAX - 10);
}
/* duplicate the tree with a specific gap */
static noinline void check_dup_gaps(struct maple_tree *mt,
unsigned long nr_entries, bool zero_start,
unsigned long gap)
{
unsigned long i = 0;
struct maple_tree newmt;
int ret;
void *tmp;
MA_STATE(mas, mt, 0, 0);
MA_STATE(newmas, &newmt, 0, 0);
if (!zero_start)
i = 1;
mt_zero_nr_tallocated();
for (; i <= nr_entries; i++)
mtree_store_range(mt, i*10, (i+1)*10 - gap,
xa_mk_value(i), GFP_KERNEL);
mt_init_flags(&newmt, MT_FLAGS_ALLOC_RANGE);
mt_set_non_kernel(99999);
mas_lock(&newmas);
ret = mas_expected_entries(&newmas, nr_entries);
mt_set_non_kernel(0);
MT_BUG_ON(mt, ret != 0);
rcu_read_lock();
mas_for_each(&mas, tmp, ULONG_MAX) {
newmas.index = mas.index;
newmas.last = mas.last;
mas_store(&newmas, tmp);
}
rcu_read_unlock();
mas_destroy(&newmas);
mas_unlock(&newmas);
mtree_destroy(&newmt);
}
/* Duplicate many sizes of trees. Mainly to test expected entry values */
static noinline void check_dup(struct maple_tree *mt)
{
int i;
int big_start = 100010;
/* Check with a value at zero */
for (i = 10; i < 1000; i++) {
mt_init_flags(mt, MT_FLAGS_ALLOC_RANGE);
check_dup_gaps(mt, i, true, 5);
mtree_destroy(mt);
rcu_barrier();
}
cond_resched();
mt_cache_shrink();
/* Check with a value at zero, no gap */
for (i = 1000; i < 2000; i++) {
mt_init_flags(mt, MT_FLAGS_ALLOC_RANGE);
check_dup_gaps(mt, i, true, 0);
mtree_destroy(mt);
rcu_barrier();
}
cond_resched();
mt_cache_shrink();
/* Check with a value at zero and unreasonably large */
for (i = big_start; i < big_start + 10; i++) {
mt_init_flags(mt, MT_FLAGS_ALLOC_RANGE);
check_dup_gaps(mt, i, true, 5);
mtree_destroy(mt);
rcu_barrier();
}
cond_resched();
mt_cache_shrink();
/* Small to medium size not starting at zero*/
for (i = 200; i < 1000; i++) {
mt_init_flags(mt, MT_FLAGS_ALLOC_RANGE);
check_dup_gaps(mt, i, false, 5);
mtree_destroy(mt);
rcu_barrier();
}
cond_resched();
mt_cache_shrink();
/* Unreasonably large not starting at zero*/
for (i = big_start; i < big_start + 10; i++) {
mt_init_flags(mt, MT_FLAGS_ALLOC_RANGE);
check_dup_gaps(mt, i, false, 5);
mtree_destroy(mt);
rcu_barrier();
cond_resched();
mt_cache_shrink();
}
/* Check non-allocation tree not starting at zero */
for (i = 1500; i < 3000; i++) {
mt_init_flags(mt, 0);
check_dup_gaps(mt, i, false, 5);
mtree_destroy(mt);
rcu_barrier();
cond_resched();
if (i % 2 == 0)
mt_cache_shrink();
}
mt_cache_shrink();
/* Check non-allocation tree starting at zero */
for (i = 200; i < 1000; i++) {
mt_init_flags(mt, 0);
check_dup_gaps(mt, i, true, 5);
mtree_destroy(mt);
rcu_barrier();
cond_resched();
}
mt_cache_shrink();
/* Unreasonably large */
for (i = big_start + 5; i < big_start + 10; i++) {
mt_init_flags(mt, 0);
check_dup_gaps(mt, i, true, 5);
mtree_destroy(mt);
rcu_barrier();
mt_cache_shrink();
cond_resched();
}
}
static noinline void check_bnode_min_spanning(struct maple_tree *mt)
{
int i = 50;
MA_STATE(mas, mt, 0, 0);
mt_set_non_kernel(9999);
mas_lock(&mas);
do {
mas_set_range(&mas, i*10, i*10+9);
mas_store(&mas, check_bnode_min_spanning);
} while (i--);
mas_set_range(&mas, 240, 509);
mas_store(&mas, NULL);
mas_unlock(&mas);
mas_destroy(&mas);
mt_set_non_kernel(0);
}
static DEFINE_MTREE(tree);
static int maple_tree_seed(void)
{
unsigned long set[] = {5015, 5014, 5017, 25, 1000,
1001, 1002, 1003, 1005, 0,
5003, 5002};
void *ptr = &set;
pr_info("\nTEST STARTING\n\n");
mt_init_flags(&tree, MT_FLAGS_ALLOC_RANGE);
check_root_expand(&tree);
mtree_destroy(&tree);
#if defined(BENCH_SLOT_STORE)
#define BENCH
mt_init_flags(&tree, MT_FLAGS_ALLOC_RANGE);
bench_slot_store(&tree);
mtree_destroy(&tree);
goto skip;
#endif
#if defined(BENCH_NODE_STORE)
#define BENCH
mt_init_flags(&tree, MT_FLAGS_ALLOC_RANGE);
bench_node_store(&tree);
mtree_destroy(&tree);
goto skip;
#endif
#if defined(BENCH_AWALK)
#define BENCH
mt_init_flags(&tree, MT_FLAGS_ALLOC_RANGE);
bench_awalk(&tree);
mtree_destroy(&tree);
goto skip;
#endif
#if defined(BENCH_WALK)
#define BENCH
mt_init_flags(&tree, MT_FLAGS_ALLOC_RANGE);
bench_walk(&tree);
mtree_destroy(&tree);
goto skip;
#endif
#if defined(BENCH_FORK)
#define BENCH
mt_init_flags(&tree, MT_FLAGS_ALLOC_RANGE);
bench_forking(&tree);
mtree_destroy(&tree);
goto skip;
#endif
#if defined(BENCH_MT_FOR_EACH)
#define BENCH
mt_init_flags(&tree, MT_FLAGS_ALLOC_RANGE);
bench_mt_for_each(&tree);
mtree_destroy(&tree);
goto skip;
#endif
mt_init_flags(&tree, MT_FLAGS_ALLOC_RANGE);
check_forking(&tree);
mtree_destroy(&tree);
mt_init_flags(&tree, MT_FLAGS_ALLOC_RANGE);
check_mas_store_gfp(&tree);
mtree_destroy(&tree);
/* Test ranges (store and insert) */
mt_init_flags(&tree, 0);
check_ranges(&tree);
mtree_destroy(&tree);
#if defined(CONFIG_64BIT)
/* These tests have ranges outside of 4GB */
mt_init_flags(&tree, MT_FLAGS_ALLOC_RANGE);
check_alloc_range(&tree);
mtree_destroy(&tree);
mt_init_flags(&tree, MT_FLAGS_ALLOC_RANGE);
check_alloc_rev_range(&tree);
mtree_destroy(&tree);
#endif
mt_init_flags(&tree, 0);
check_load(&tree, set[0], NULL); /* See if 5015 -> NULL */
check_insert(&tree, set[9], &tree); /* Insert 0 */
check_load(&tree, set[9], &tree); /* See if 0 -> &tree */
check_load(&tree, set[0], NULL); /* See if 5015 -> NULL */
check_insert(&tree, set[10], ptr); /* Insert 5003 */
check_load(&tree, set[9], &tree); /* See if 0 -> &tree */
check_load(&tree, set[11], NULL); /* See if 5002 -> NULL */
check_load(&tree, set[10], ptr); /* See if 5003 -> ptr */
/* Clear out the tree */
mtree_destroy(&tree);
/* Try to insert, insert a dup, and load back what was inserted. */
mt_init_flags(&tree, 0);
check_insert(&tree, set[0], &tree); /* Insert 5015 */
check_dup_insert(&tree, set[0], &tree); /* Insert 5015 again */
check_load(&tree, set[0], &tree); /* See if 5015 -> &tree */
/*
* Second set of tests try to load a value that doesn't exist, inserts
* a second value, then loads the value again
*/
check_load(&tree, set[1], NULL); /* See if 5014 -> NULL */
check_insert(&tree, set[1], ptr); /* insert 5014 -> ptr */
check_load(&tree, set[1], ptr); /* See if 5014 -> ptr */
check_load(&tree, set[0], &tree); /* See if 5015 -> &tree */
/*
* Tree currently contains:
* p[0]: 14 -> (nil) p[1]: 15 -> ptr p[2]: 16 -> &tree p[3]: 0 -> (nil)
*/
check_insert(&tree, set[6], ptr); /* insert 1002 -> ptr */
check_insert(&tree, set[7], &tree); /* insert 1003 -> &tree */
check_load(&tree, set[0], &tree); /* See if 5015 -> &tree */
check_load(&tree, set[1], ptr); /* See if 5014 -> ptr */
check_load(&tree, set[6], ptr); /* See if 1002 -> ptr */
check_load(&tree, set[7], &tree); /* 1003 = &tree ? */
/* Clear out tree */
mtree_destroy(&tree);
mt_init_flags(&tree, 0);
/* Test inserting into a NULL hole. */
check_insert(&tree, set[5], ptr); /* insert 1001 -> ptr */
check_insert(&tree, set[7], &tree); /* insert 1003 -> &tree */
check_insert(&tree, set[6], ptr); /* insert 1002 -> ptr */
check_load(&tree, set[5], ptr); /* See if 1001 -> ptr */
check_load(&tree, set[6], ptr); /* See if 1002 -> ptr */
check_load(&tree, set[7], &tree); /* See if 1003 -> &tree */
/* Clear out the tree */
mtree_destroy(&tree);
mt_init_flags(&tree, 0);
/*
* set[] = {5015, 5014, 5017, 25, 1000,
* 1001, 1002, 1003, 1005, 0,
* 5003, 5002};
*/
check_insert(&tree, set[0], ptr); /* 5015 */
check_insert(&tree, set[1], &tree); /* 5014 */
check_insert(&tree, set[2], ptr); /* 5017 */
check_insert(&tree, set[3], &tree); /* 25 */
check_load(&tree, set[0], ptr);
check_load(&tree, set[1], &tree);
check_load(&tree, set[2], ptr);
check_load(&tree, set[3], &tree);
check_insert(&tree, set[4], ptr); /* 1000 < Should split. */
check_load(&tree, set[0], ptr);
check_load(&tree, set[1], &tree);
check_load(&tree, set[2], ptr);
check_load(&tree, set[3], &tree); /*25 */
check_load(&tree, set[4], ptr);
check_insert(&tree, set[5], &tree); /* 1001 */
check_load(&tree, set[0], ptr);
check_load(&tree, set[1], &tree);
check_load(&tree, set[2], ptr);
check_load(&tree, set[3], &tree);
check_load(&tree, set[4], ptr);
check_load(&tree, set[5], &tree);
check_insert(&tree, set[6], ptr);
check_load(&tree, set[0], ptr);
check_load(&tree, set[1], &tree);
check_load(&tree, set[2], ptr);
check_load(&tree, set[3], &tree);
check_load(&tree, set[4], ptr);
check_load(&tree, set[5], &tree);
check_load(&tree, set[6], ptr);
check_insert(&tree, set[7], &tree);
check_load(&tree, set[0], ptr);
check_insert(&tree, set[8], ptr);
check_insert(&tree, set[9], &tree);
check_load(&tree, set[0], ptr);
check_load(&tree, set[1], &tree);
check_load(&tree, set[2], ptr);
check_load(&tree, set[3], &tree);
check_load(&tree, set[4], ptr);
check_load(&tree, set[5], &tree);
check_load(&tree, set[6], ptr);
check_load(&tree, set[9], &tree);
mtree_destroy(&tree);
mt_init_flags(&tree, 0);
check_seq(&tree, 16, false);
mtree_destroy(&tree);
mt_init_flags(&tree, 0);
check_seq(&tree, 1000, true);
mtree_destroy(&tree);
mt_init_flags(&tree, MT_FLAGS_ALLOC_RANGE);
check_rev_seq(&tree, 1000, true);
mtree_destroy(&tree);
check_lower_bound_split(&tree);
check_upper_bound_split(&tree);
check_mid_split(&tree);
mt_init_flags(&tree, 0);
check_next_entry(&tree);
check_find(&tree);
check_find_2(&tree);
mtree_destroy(&tree);
mt_init_flags(&tree, MT_FLAGS_ALLOC_RANGE);
check_prev_entry(&tree);
mtree_destroy(&tree);
mt_init_flags(&tree, MT_FLAGS_ALLOC_RANGE);
check_gap_combining(&tree);
mtree_destroy(&tree);
mt_init_flags(&tree, MT_FLAGS_ALLOC_RANGE);
check_node_overwrite(&tree);
mtree_destroy(&tree);
mt_init_flags(&tree, MT_FLAGS_ALLOC_RANGE);
next_prev_test(&tree);
mtree_destroy(&tree);
mt_init_flags(&tree, MT_FLAGS_ALLOC_RANGE);
check_spanning_relatives(&tree);
mtree_destroy(&tree);
mt_init_flags(&tree, MT_FLAGS_ALLOC_RANGE);
check_rev_find(&tree);
mtree_destroy(&tree);
mt_init_flags(&tree, 0);
check_fuzzer(&tree);
mtree_destroy(&tree);
mt_init_flags(&tree, MT_FLAGS_ALLOC_RANGE);
check_dup(&tree);
mtree_destroy(&tree);
mt_init_flags(&tree, MT_FLAGS_ALLOC_RANGE);
check_bnode_min_spanning(&tree);
mtree_destroy(&tree);
#if defined(BENCH)
skip:
#endif
rcu_barrier();
pr_info("maple_tree: %u of %u tests passed\n",
atomic_read(&maple_tree_tests_passed),
atomic_read(&maple_tree_tests_run));
if (atomic_read(&maple_tree_tests_run) ==
atomic_read(&maple_tree_tests_passed))
return 0;
return -EINVAL;
}
static void maple_tree_harvest(void)
{
}
module_init(maple_tree_seed);
module_exit(maple_tree_harvest);
MODULE_AUTHOR("Liam R. Howlett <Liam.Howlett@Oracle.com>");
MODULE_LICENSE("GPL");
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