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authorMatthew Wilcox <willy@infradead.org>2017-12-04 00:11:48 -0500
committerMatthew Wilcox <willy@infradead.org>2018-10-21 10:45:59 -0400
commit2264f5132fe45571139727ebdeb78696b35d1506 (patch)
tree6982c4c48af09fc39c1faf5da5b39c5d4fc41ad0 /lib/test_xarray.c
parent4e99d4e9579d3b950bf4b38d0d64eb1b9be78761 (diff)
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xarray: Add xas_create_range
This hopefully temporary function is useful for users who have not yet been converted to multi-index entries. Signed-off-by: Matthew Wilcox <willy@infradead.org>
Diffstat (limited to 'lib/test_xarray.c')
-rw-r--r--lib/test_xarray.c119
1 files changed, 119 insertions, 0 deletions
diff --git a/lib/test_xarray.c b/lib/test_xarray.c
index 8eba3de1baea..703370015d10 100644
--- a/lib/test_xarray.c
+++ b/lib/test_xarray.c
@@ -646,6 +646,124 @@ static noinline void check_move(struct xarray *xa)
check_move_small(xa, (1UL << i) - 1);
}
+static noinline void xa_store_many_order(struct xarray *xa,
+ unsigned long index, unsigned order)
+{
+ XA_STATE_ORDER(xas, xa, index, order);
+ unsigned int i = 0;
+
+ do {
+ xas_lock(&xas);
+ XA_BUG_ON(xa, xas_find_conflict(&xas));
+ xas_create_range(&xas);
+ if (xas_error(&xas))
+ goto unlock;
+ for (i = 0; i < (1U << order); i++) {
+ XA_BUG_ON(xa, xas_store(&xas, xa_mk_value(index + i)));
+ xas_next(&xas);
+ }
+unlock:
+ xas_unlock(&xas);
+ } while (xas_nomem(&xas, GFP_KERNEL));
+
+ XA_BUG_ON(xa, xas_error(&xas));
+}
+
+static noinline void check_create_range_1(struct xarray *xa,
+ unsigned long index, unsigned order)
+{
+ unsigned long i;
+
+ xa_store_many_order(xa, index, order);
+ for (i = index; i < index + (1UL << order); i++)
+ xa_erase_index(xa, i);
+ XA_BUG_ON(xa, !xa_empty(xa));
+}
+
+static noinline void check_create_range_2(struct xarray *xa, unsigned order)
+{
+ unsigned long i;
+ unsigned long nr = 1UL << order;
+
+ for (i = 0; i < nr * nr; i += nr)
+ xa_store_many_order(xa, i, order);
+ for (i = 0; i < nr * nr; i++)
+ xa_erase_index(xa, i);
+ XA_BUG_ON(xa, !xa_empty(xa));
+}
+
+static noinline void check_create_range_3(void)
+{
+ XA_STATE(xas, NULL, 0);
+ xas_set_err(&xas, -EEXIST);
+ xas_create_range(&xas);
+ XA_BUG_ON(NULL, xas_error(&xas) != -EEXIST);
+}
+
+static noinline void check_create_range_4(struct xarray *xa,
+ unsigned long index, unsigned order)
+{
+ XA_STATE_ORDER(xas, xa, index, order);
+ unsigned long base = xas.xa_index;
+ unsigned long i = 0;
+
+ xa_store_index(xa, index, GFP_KERNEL);
+ do {
+ xas_lock(&xas);
+ xas_create_range(&xas);
+ if (xas_error(&xas))
+ goto unlock;
+ for (i = 0; i < (1UL << order); i++) {
+ void *old = xas_store(&xas, xa_mk_value(base + i));
+ if (xas.xa_index == index)
+ XA_BUG_ON(xa, old != xa_mk_value(base + i));
+ else
+ XA_BUG_ON(xa, old != NULL);
+ xas_next(&xas);
+ }
+unlock:
+ xas_unlock(&xas);
+ } while (xas_nomem(&xas, GFP_KERNEL));
+
+ XA_BUG_ON(xa, xas_error(&xas));
+
+ for (i = base; i < base + (1UL << order); i++)
+ xa_erase_index(xa, i);
+ XA_BUG_ON(xa, !xa_empty(xa));
+}
+
+static noinline void check_create_range(struct xarray *xa)
+{
+ unsigned int order;
+ unsigned int max_order = IS_ENABLED(CONFIG_XARRAY_MULTI) ? 12 : 1;
+
+ for (order = 0; order < max_order; order++) {
+ check_create_range_1(xa, 0, order);
+ check_create_range_1(xa, 1U << order, order);
+ check_create_range_1(xa, 2U << order, order);
+ check_create_range_1(xa, 3U << order, order);
+ check_create_range_1(xa, 1U << 24, order);
+ if (order < 10)
+ check_create_range_2(xa, order);
+
+ check_create_range_4(xa, 0, order);
+ check_create_range_4(xa, 1U << order, order);
+ check_create_range_4(xa, 2U << order, order);
+ check_create_range_4(xa, 3U << order, order);
+ check_create_range_4(xa, 1U << 24, order);
+
+ check_create_range_4(xa, 1, order);
+ check_create_range_4(xa, (1U << order) + 1, order);
+ check_create_range_4(xa, (2U << order) + 1, order);
+ check_create_range_4(xa, (2U << order) - 1, order);
+ check_create_range_4(xa, (3U << order) + 1, order);
+ check_create_range_4(xa, (3U << order) - 1, order);
+ check_create_range_4(xa, (1U << 24) + 1, order);
+ }
+
+ check_create_range_3();
+}
+
static noinline void check_destroy(struct xarray *xa)
{
unsigned long index;
@@ -694,6 +812,7 @@ static int xarray_checks(void)
check_find(&array);
check_destroy(&array);
check_move(&array);
+ check_create_range(&array);
check_store_iter(&array);
printk("XArray: %u of %u tests passed\n", tests_passed, tests_run);