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Date: Wed, 15 Jan 2020 07:58:39 +0800 From: wenxu <wenxu@...oud.cn> To: Saeed Mahameed <saeedm@...lanox.com>, Roi Dayan <roid@...lanox.com>, Mark Bloch <markb@...lanox.com>, Paul Blakey <paulb@...lanox.com>, Vlad Buslov <vladbu@...lanox.com> Cc: "netdev@...r.kernel.org" <netdev@...r.kernel.org> Subject: Re: [PATCH net-next v2] net/mlx5e: Add mlx5e_flower_parse_meta support 2020/1/15 4:46, Saeed Mahameed : > Hi Wenxu, > > According to our regression Team, This commit is breaking vxlan offload > CC'ed Paul, Roi and Vlad, they will assist you if you need any help. > > can you please investigate the following call trace ? Hi Saeed & Paul, This patch just check the meta key match with the filter_dev. If this match failed, The new flower install will failed and never allocate new mlx5_fs_ftes. How can I reproduce this case? Can you provide the test case script? BR wenxu > > > [ 363.789805] ##################################### > [ 363.791150] ## TEST test-vxlan-port-offload.sh ## > [ 363.792499] ##################################### > [ 364.916862] :test: Test adding vxlan rule after creating vxlan > interface and reloading modules > [ 364.926877] :test: - create vxlan interface > [ 364.938976] :test: - reload modules > [ 365.689825] mlx5_core 0000:00:08.3 enp0s8f3: Link down > [ 365.790063] mlx5_core 0000:00:08.2 enp0s8f2: Link down > [ 366.040167] mlx5_core 0000:00:08.6 enp0s8f6: Link down > [ 370.399771] mlx5_core 0000:00:08.1: E-Switch: Disable: > mode(OFFLOADS), nvfs(1), active vports(2) > [ 371.006097] mlx5_core 0000:00:08.1: E-Switch: cleanup > [ 371.581179] mlx5_core 0000:00:08.1: driver left SR-IOV enabled > after remove > [ 371.585021] mlx5_core 0000:00:08.0: E-Switch: Disable: > mode(OFFLOADS), nvfs(3), active vports(4) > [ 371.743029] > ======================================================================= > ====== > [ 371.746917] BUG mlx5_fs_ftes (Not tainted): Objects remaining in > mlx5_fs_ftes on __kmem_cache_shutdown() > [ 371.751265] ----------------------------------------------------- > ------------------------ > [ 371.751265] > [ 371.754662] Disabling lock debugging due to kernel taint > [ 371.755672] INFO: Slab 0x00000000c3fc424e objects=27 used=1 > fp=0x00000000b711cbdf flags=0x8000000000010200 > [ 371.757523] CPU: 0 PID: 13112 Comm: modprobe Tainted: > G B 5.5.0-rc4-J8553-G8b261307a8b0 #1 > [ 371.759458] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), > BIOS rel-1.12.1-0-ga5cab58e9a3f-prebuilt.qemu.org 04/01/2014 > [ 371.761692] Call Trace: > [ 371.762378] dump_stack+0x50/0x70 > [ 371.763168] slab_err+0xb7/0xdc > [ 371.763936] ? slub_cpu_dead+0x10/0xa0 > [ 371.764873] ? on_each_cpu_cond_mask+0x7a/0xa0 > [ 371.765919] ? __kmalloc+0x19f/0x1f0 > [ 371.766749] __kmem_cache_shutdown.cold+0x1b/0x12f > [ 371.767769] kmem_cache_destroy+0x45/0xe0 > [ 371.768669] mlx5_cleanup_fs+0x12c/0x150 [mlx5_core] > [ 371.769753] mlx5_unload+0x1e/0x70 [mlx5_core] > [ 371.770744] mlx5_unload_one+0x49/0xb0 [mlx5_core] > [ 371.771772] remove_one+0x38/0x80 [mlx5_core] > [ 371.772724] pci_device_remove+0x36/0xa0 > [ 371.773625] device_release_driver_internal+0xe1/0x1b0 > [ 371.774731] driver_detach+0x3f/0x79 > [ 371.775532] bus_remove_driver+0x58/0xcc > [ 371.776407] pci_unregister_driver+0x2d/0x90 > [ 371.777436] cleanup+0x11/0x254 [mlx5_core] > [ 371.778376] __x64_sys_delete_module+0x11b/0x1f0 > [ 371.779358] ? exit_to_usermode_loop+0xac/0xb0 > [ 371.780314] do_syscall_64+0x42/0x130 > [ 371.781129] entry_SYSCALL_64_after_hwframe+0x44/0xa9 > [ 371.782305] RIP: 0033:0x7f0496589ae7 > [ 371.783107] Code: 73 01 c3 48 8b 0d 99 a3 2b 00 f7 d8 64 89 01 48 > 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 b0 00 00 00 > 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 69 a3 2b 00 f7 d8 64 89 01 > 48 > [ 371.786595] RSP: 002b:00007ffd14aff778 EFLAGS: 00000206 ORIG_RAX: > 00000000000000b0 > [ 371.788122] RAX: ffffffffffffffda RBX: 000055e5a261bf70 RCX: > 00007f0496589ae7 > [ 371.799948] RDX: 0000000000000000 RSI: 0000000000000800 RDI: > 000055e5a261bfd8 > [ 371.801336] RBP: 000055e5a261bf70 R08: 00007ffd14afe721 R09: > 0000000000000000 > [ 371.802773] R10: 00007f04965f81e0 R11: 0000000000000206 R12: > 000055e5a261bfd8 > [ 371.804182] R13: 000055e5a261c8e0 R14: 000055e5a261bc38 R15: > 00007ffd14b00b98 > [ 371.805633] INFO: Object 0x0000000057a96e69 @offset=9000 > [ 371.806851] kmem_cache_destroy mlx5_fs_ftes: Slab cache still has > objects > [ 371.808330] CPU: 0 PID: 13112 Comm: modprobe Tainted: > G B 5.5.0-rc4-J8553-G8b261307a8b0 #1 > [ 371.810311] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), > BIOS rel-1.12.1-0-ga5cab58e9a3f-prebuilt.qemu.org 04/01/2014 > > >> 1 file changed, 39 insertions(+) >> >> diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c >> b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c >> index 9b32a9c..33d1ce5 100644 >> --- a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c >> +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c >> @@ -1805,6 +1805,40 @@ static void *get_match_headers_value(u32 >> flags, >> outer_headers); >> } >> >> +static int mlx5e_flower_parse_meta(struct net_device *filter_dev, >> + struct flow_cls_offload *f) >> +{ >> + struct flow_rule *rule = flow_cls_offload_flow_rule(f); >> + struct netlink_ext_ack *extack = f->common.extack; >> + struct net_device *ingress_dev; >> + struct flow_match_meta match; >> + >> + if (!flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_META)) >> + return 0; >> + >> + flow_rule_match_meta(rule, &match); >> + if (match.mask->ingress_ifindex != 0xFFFFFFFF) { >> + NL_SET_ERR_MSG_MOD(extack, "Unsupported ingress ifindex >> mask"); >> + return -EINVAL; >> + } >> + >> + ingress_dev = __dev_get_by_index(dev_net(filter_dev), >> + match.key->ingress_ifindex); >> + if (!ingress_dev) { >> + NL_SET_ERR_MSG_MOD(extack, >> + "Can't find the ingress port to >> match on"); >> + return -EINVAL; >> + } >> + >> + if (ingress_dev != filter_dev) { >> + NL_SET_ERR_MSG_MOD(extack, >> + "Can't match on the ingress filter >> port"); >> + return -EINVAL; >> + } >> + >> + return 0; >> +} >> + >> static int __parse_cls_flower(struct mlx5e_priv *priv, >> struct mlx5_flow_spec *spec, >> struct flow_cls_offload *f, >> @@ -1825,6 +1859,7 @@ static int __parse_cls_flower(struct mlx5e_priv >> *priv, >> u16 addr_type = 0; >> u8 ip_proto = 0; >> u8 *match_level; >> + int err; >> >> match_level = outer_match_level; >> >> @@ -1868,6 +1903,10 @@ static int __parse_cls_flower(struct >> mlx5e_priv *priv, >> spec); >> } >> >> + err = mlx5e_flower_parse_meta(filter_dev, f); >> + if (err) >> + return err; >> + >> if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_BASIC)) { >> struct flow_match_basic match; >>
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