From: Alexander Lobakin <aleksander.lobakin@intel.com>
To: "David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>
Cc: Alexander Lobakin <aleksander.lobakin@intel.com>,
Michal Swiatkowski <michal.swiatkowski@linux.intel.com>,
Marcin Szycik <marcin.szycik@linux.intel.com>,
Wojciech Drewek <wojciech.drewek@intel.com>,
Yury Norov <yury.norov@gmail.com>,
Andy Shevchenko <andy@kernel.org>,
Rasmus Villemoes <linux@rasmusvillemoes.dk>,
Alexander Potapenko <glider@google.com>,
Jiri Pirko <jiri@resnulli.us>, Ido Schimmel <idosch@nvidia.com>,
Przemek Kitszel <przemyslaw.kitszel@intel.com>,
Simon Horman <horms@kernel.org>,
linux-btrfs@vger.kernel.org, dm-devel@redhat.com,
ntfs3@lists.linux.dev, linux-s390@vger.kernel.org,
intel-wired-lan@lists.osuosl.org, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: [PATCH net-next v5 17/21] lib/bitmap: add tests for IP tunnel flags conversion helpers
Date: Thu, 1 Feb 2024 13:22:12 +0100 [thread overview]
Message-ID: <20240201122216.2634007-18-aleksander.lobakin@intel.com> (raw)
In-Reply-To: <20240201122216.2634007-1-aleksander.lobakin@intel.com>
Now that there are helpers for converting IP tunnel flags between the
old __be16 format and the bitmap format, make sure they work as expected
by adding a couple of tests to the bitmap testing suite. The helpers are
all inline, so no dependencies on the related CONFIG_* (or a standalone
module) are needed.
Cover three possible cases:
1. No bits past BIT(15) are set, VTI/SIT bits are not set. This
conversion is almost a direct assignment.
2. No bits past BIT(15) are set, but VTI/SIT bit is set. During the
conversion, it must be transformed into BIT(16) in the bitmap,
but still compatible with the __be16 format.
3. The bitmap has bits past BIT(15) set (not the VTI/SIT one). The
result will be truncated.
Note that currently __IP_TUNNEL_FLAG_NUM is 17 (incl. special),
which means that the result of this case is currently
semi-false-positive. When BIT(17) is finally here, it will be
adjusted accordingly.
Signed-off-by: Alexander Lobakin <aleksander.lobakin@intel.com>
---
lib/test_bitmap.c | 105 ++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 105 insertions(+)
diff --git a/lib/test_bitmap.c b/lib/test_bitmap.c
index 4ee1f8ceb51d..270afc0cba5c 100644
--- a/lib/test_bitmap.c
+++ b/lib/test_bitmap.c
@@ -14,6 +14,8 @@
#include <linux/string.h>
#include <linux/uaccess.h>
+#include <net/ip_tunnels.h>
+
#include "../tools/testing/selftests/kselftest_module.h"
#define EXP1_IN_BITS (sizeof(exp1) * 8)
@@ -1409,6 +1411,108 @@ static void __init test_bitmap_write_perf(void)
#undef TEST_BIT_LEN
+struct ip_tunnel_flags_test {
+ const u16 *src_bits;
+ const u16 *exp_bits;
+ u8 src_num;
+ u8 exp_num;
+ __be16 exp_val;
+ bool exp_comp:1;
+};
+
+#define IP_TUNNEL_FLAGS_TEST(src, comp, eval, exp) { \
+ .src_bits = (src), \
+ .src_num = ARRAY_SIZE(src), \
+ .exp_comp = (comp), \
+ .exp_val = (eval), \
+ .exp_bits = (exp), \
+ .exp_num = ARRAY_SIZE(exp), \
+}
+
+/* These are __be16-compatible and can be compared as is */
+static const u16 ip_tunnel_flags_1[] __initconst = {
+ IP_TUNNEL_KEY_BIT,
+ IP_TUNNEL_STRICT_BIT,
+ IP_TUNNEL_ERSPAN_OPT_BIT,
+};
+
+/*
+ * Due to the previous flags design limitation, setting either
+ * ``IP_TUNNEL_CSUM_BIT`` (on Big Endian) or ``IP_TUNNEL_DONT_FRAGMENT_BIT``
+ * (on Little) also sets VTI/ISATAP bit. In the bitmap implementation, they
+ * correspond to ``BIT(16)``, which is bigger than ``U16_MAX``, but still is
+ * backward-compatible.
+ */
+#ifdef __BIG_ENDIAN
+#define IP_TUNNEL_CONFLICT_BIT IP_TUNNEL_CSUM_BIT
+#else
+#define IP_TUNNEL_CONFLICT_BIT IP_TUNNEL_DONT_FRAGMENT_BIT
+#endif
+
+static const u16 ip_tunnel_flags_2_src[] __initconst = {
+ IP_TUNNEL_CONFLICT_BIT,
+};
+
+static const u16 ip_tunnel_flags_2_exp[] __initconst = {
+ IP_TUNNEL_CONFLICT_BIT,
+ IP_TUNNEL_SIT_ISATAP_BIT,
+};
+
+/* Bits 17 and higher are not compatible with __be16 flags */
+static const u16 ip_tunnel_flags_3_src[] __initconst = {
+ IP_TUNNEL_VXLAN_OPT_BIT,
+ 17,
+ 18,
+ 20,
+};
+
+static const u16 ip_tunnel_flags_3_exp[] __initconst = {
+ IP_TUNNEL_VXLAN_OPT_BIT,
+};
+
+static const struct ip_tunnel_flags_test ip_tunnel_flags_test[] __initconst = {
+ IP_TUNNEL_FLAGS_TEST(ip_tunnel_flags_1, true,
+ cpu_to_be16(BIT(IP_TUNNEL_KEY_BIT) |
+ BIT(IP_TUNNEL_STRICT_BIT) |
+ BIT(IP_TUNNEL_ERSPAN_OPT_BIT)),
+ ip_tunnel_flags_1),
+ IP_TUNNEL_FLAGS_TEST(ip_tunnel_flags_2_src, true, VTI_ISVTI,
+ ip_tunnel_flags_2_exp),
+ IP_TUNNEL_FLAGS_TEST(ip_tunnel_flags_3_src,
+ /*
+ * This must be set to ``false`` once
+ * ``__IP_TUNNEL_FLAG_NUM`` goes above 17.
+ */
+ true,
+ cpu_to_be16(BIT(IP_TUNNEL_VXLAN_OPT_BIT)),
+ ip_tunnel_flags_3_exp),
+};
+
+static void __init test_ip_tunnel_flags(void)
+{
+ for (u32 i = 0; i < ARRAY_SIZE(ip_tunnel_flags_test); i++) {
+ typeof(*ip_tunnel_flags_test) *test = &ip_tunnel_flags_test[i];
+ IP_TUNNEL_DECLARE_FLAGS(src) = { };
+ IP_TUNNEL_DECLARE_FLAGS(exp) = { };
+ IP_TUNNEL_DECLARE_FLAGS(out);
+
+ for (u32 j = 0; j < test->src_num; j++)
+ __set_bit(test->src_bits[j], src);
+
+ for (u32 j = 0; j < test->exp_num; j++)
+ __set_bit(test->exp_bits[j], exp);
+
+ ip_tunnel_flags_from_be16(out, test->exp_val);
+
+ expect_eq_uint(test->exp_comp,
+ ip_tunnel_flags_is_be16_compat(src));
+ expect_eq_uint((__force u16)test->exp_val,
+ (__force u16)ip_tunnel_flags_to_be16(src));
+
+ __ipt_flag_op(expect_eq_bitmap, exp, out);
+ }
+}
+
static void __init selftest(void)
{
test_zero_clear();
@@ -1428,6 +1532,7 @@ static void __init selftest(void)
test_bitmap_read_write();
test_bitmap_read_perf();
test_bitmap_write_perf();
+ test_ip_tunnel_flags();
test_find_nth_bit();
test_for_each_set_bit();
--
2.43.0
next prev parent reply other threads:[~2024-02-01 12:25 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-01 12:21 [PATCH net-next v5 00/21] ice: add PFCP filter support Alexander Lobakin
2024-02-01 12:21 ` [PATCH net-next v5 01/21] lib/bitmap: add bitmap_{read,write}() Alexander Lobakin
2024-02-01 13:23 ` Arnd Bergmann
2024-02-01 13:45 ` Alexander Potapenko
2024-02-01 14:02 ` Arnd Bergmann
2024-02-28 16:10 ` Yury Norov
2024-02-01 15:49 ` Alexander Lobakin
2024-02-01 12:21 ` [PATCH net-next v5 02/21] lib/test_bitmap: add tests for bitmap_{read,write}() Alexander Lobakin
2024-02-28 16:13 ` Yury Norov
2024-02-01 12:21 ` [PATCH net-next v5 03/21] lib/test_bitmap: use pr_info() for non-error messages Alexander Lobakin
2024-02-28 16:16 ` Yury Norov
2024-02-01 12:21 ` [PATCH net-next v5 04/21] bitops: add missing prototype check Alexander Lobakin
2024-02-28 16:18 ` Yury Norov
2024-02-01 12:22 ` [PATCH net-next v5 05/21] bitops: make BYTES_TO_BITS() treewide-available Alexander Lobakin
2024-02-28 16:20 ` Yury Norov
2024-02-01 12:22 ` [PATCH net-next v5 06/21] bitops: let the compiler optimize {__,}assign_bit() Alexander Lobakin
2024-02-28 16:23 ` Yury Norov
2024-02-01 12:22 ` [PATCH net-next v5 07/21] linkmode: convert linkmode_{test,set,clear,mod}_bit() to macros Alexander Lobakin
2024-02-28 16:24 ` Yury Norov
2024-02-01 12:22 ` [PATCH net-next v5 08/21] s390/cio: rename bitmap_size() -> idset_bitmap_size() Alexander Lobakin
2024-02-26 17:13 ` Peter Oberparleiter
2024-02-01 12:22 ` [PATCH net-next v5 09/21] fs/ntfs3: add prefix to bitmap_size() and use BITS_TO_U64() Alexander Lobakin
2024-02-28 16:26 ` Yury Norov
2024-02-01 12:22 ` [PATCH net-next v5 10/21] btrfs: rename bitmap_set_bits() -> btrfs_bitmap_set_bits() Alexander Lobakin
2024-02-28 16:27 ` Yury Norov
2024-02-01 12:22 ` [PATCH net-next v5 11/21] tools: move alignment-related macros to new <linux/align.h> Alexander Lobakin
2024-02-02 11:37 ` Przemek Kitszel
2024-02-28 16:28 ` Yury Norov
2024-02-28 16:29 ` Yury Norov
2024-02-01 12:22 ` [PATCH net-next v5 12/21] bitmap: introduce generic optimized bitmap_size() Alexander Lobakin
2024-02-28 16:31 ` Yury Norov
2024-02-01 12:22 ` [PATCH net-next v5 13/21] bitmap: make bitmap_{get,set}_value8() use bitmap_{read,write}() Alexander Lobakin
2024-02-02 11:39 ` Przemek Kitszel
2024-02-28 16:31 ` Yury Norov
2024-02-01 12:22 ` [PATCH net-next v5 14/21] lib/bitmap: add compile-time test for __assign_bit() optimization Alexander Lobakin
2024-02-28 16:32 ` Yury Norov
2024-02-01 12:22 ` [PATCH net-next v5 15/21] ip_tunnel: use a separate struct to store tunnel params in the kernel Alexander Lobakin
2024-02-01 12:22 ` [PATCH net-next v5 16/21] ip_tunnel: convert __be16 tunnel flags to bitmaps Alexander Lobakin
2024-02-01 12:22 ` Alexander Lobakin [this message]
2024-02-28 16:38 ` [PATCH net-next v5 17/21] lib/bitmap: add tests for IP tunnel flags conversion helpers Yury Norov
2024-03-26 12:20 ` Alexander Lobakin
2024-02-01 12:22 ` [PATCH net-next v5 18/21] pfcp: add PFCP module Alexander Lobakin
2024-02-01 12:22 ` [PATCH net-next v5 19/21] pfcp: always set pfcp metadata Alexander Lobakin
2024-02-01 12:22 ` [PATCH net-next v5 20/21] ice: refactor ICE_TC_FLWR_FIELD_ENC_OPTS Alexander Lobakin
2024-02-01 12:22 ` [PATCH net-next v5 21/21] ice: Add support for PFCP hardware offload in switchdev Alexander Lobakin
2024-02-06 12:46 ` [PATCH net-next v5 00/21] ice: add PFCP filter support Alexander Lobakin
2024-02-06 15:37 ` Jakub Kicinski
2024-02-07 15:05 ` Jakub Kicinski
2024-02-12 11:35 ` [Intel-wired-lan] " Alexander Lobakin
2024-02-28 16:46 ` Yury Norov
2024-04-02 10:59 ` Niklas Schnelle
2024-04-02 11:00 ` Alexander Lobakin
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