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authorMatthew Wilcox <willy@infradead.org>2018-06-19 01:10:32 +0300
committerMatthew Wilcox <willy@infradead.org>2018-08-22 06:54:20 +0300
commit5c78b0b1ebe16fbae39a1cada79ab067965828f5 (patch)
treea46125bb6d45627bbb8026ba337f1d0518ffcf57 /lib
parent161b47e31f9912947a3a72dcb161c79978a1fe04 (diff)
downloadlinux-5c78b0b1ebe16fbae39a1cada79ab067965828f5.tar.xz
test_ida: Convert check_ida_conv to new API
Move as much as possible to kernel space; leave the parts in user space that rely on checking memory allocation failures to detect the transition between an exceptional entry and a bitmap. Signed-off-by: Matthew Wilcox <willy@infradead.org>
Diffstat (limited to 'lib')
-rw-r--r--lib/test_ida.c30
1 files changed, 30 insertions, 0 deletions
diff --git a/lib/test_ida.c b/lib/test_ida.c
index 44174ec9f5bf..eaee9a28f325 100644
--- a/lib/test_ida.c
+++ b/lib/test_ida.c
@@ -69,6 +69,35 @@ static void ida_check_max(struct ida *ida)
}
}
+/*
+ * Check handling of conversions between exceptional entries and full bitmaps.
+ */
+static void ida_check_conv(struct ida *ida)
+{
+ unsigned long i;
+
+ for (i = 0; i < IDA_BITMAP_BITS * 2; i += IDA_BITMAP_BITS) {
+ IDA_BUG_ON(ida, ida_alloc_min(ida, i + 1, GFP_KERNEL) != i + 1);
+ IDA_BUG_ON(ida, ida_alloc_min(ida, i + BITS_PER_LONG,
+ GFP_KERNEL) != i + BITS_PER_LONG);
+ ida_free(ida, i + 1);
+ ida_free(ida, i + BITS_PER_LONG);
+ IDA_BUG_ON(ida, !ida_is_empty(ida));
+ }
+
+ for (i = 0; i < IDA_BITMAP_BITS * 2; i++)
+ IDA_BUG_ON(ida, ida_alloc(ida, GFP_KERNEL) != i);
+ for (i = IDA_BITMAP_BITS * 2; i > 0; i--)
+ ida_free(ida, i - 1);
+ IDA_BUG_ON(ida, !ida_is_empty(ida));
+
+ for (i = 0; i < IDA_BITMAP_BITS + BITS_PER_LONG - 4; i++)
+ IDA_BUG_ON(ida, ida_alloc(ida, GFP_KERNEL) != i);
+ for (i = IDA_BITMAP_BITS + BITS_PER_LONG - 4; i > 0; i--)
+ ida_free(ida, i - 1);
+ IDA_BUG_ON(ida, !ida_is_empty(ida));
+}
+
static int ida_checks(void)
{
DEFINE_IDA(ida);
@@ -78,6 +107,7 @@ static int ida_checks(void)
ida_check_leaf(&ida, 1024);
ida_check_leaf(&ida, 1024 * 64);
ida_check_max(&ida);
+ ida_check_conv(&ida);
printk("IDA: %u of %u tests passed\n", tests_passed, tests_run);
return (tests_run != tests_passed) ? 0 : -EINVAL;