leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Merge branch 'bpf-tstamp-follow-ups'

Browse Source 
Martin KaFai Lau says:

====================
This set is a follow up on the bpf side based on discussion [0].

Patch 1 is to remove some skbuff macros that are used in bpf filter.c.

Patch 2 and 3 are to simplify the bpf insn rewrite on __sk_buff->tstamp.

Patch 4 is to simplify the bpf uapi by modeling the __sk_buff->tstamp
and __sk_buff->tstamp_type (was delivery_time_type) the same as its kernel
counter part skb->tstamp and skb->mono_delivery_time.

Patch 5 is to adjust the bpf selftests due to changes in patch 4.

  [0]: https://lore.kernel.org/bpf/419d994e-ff61-7c11-0ec7-11fefcb0186e@iogearbox.net/
====================

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
This commit is contained in:
Daniel Borkmann 2022-03-10 22:57:06 +01:00
commit 60695896e4
6 changed files with 125 additions and 138 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
include/linux/filter.h
View File

@ -573,7 +573,7 @@ struct bpf_prog {
enforce_expected_attach_type:1, /* Enforce expected_attach_type checking at attach time */
call_get_stack:1, /* Do we call bpf_get_stack() or bpf_get_stackid() */
call_get_func_ip:1, /* Do we call get_func_ip() */
delivery_time_access:1; /* Accessed __sk_buff->delivery_time_type */
tstamp_type_access:1; /* Accessed __sk_buff->tstamp_type */
enum bpf_prog_type type; /* Type of BPF program */
enum bpf_attach_type expected_attach_type; /* For some prog types */
u32 len; /* Number of filter blocks */

10
include/linux/skbuff.h
View File

@ -960,10 +960,10 @@ struct sk_buff {
__u8 csum_complete_sw:1;
__u8 csum_level:2;
__u8 dst_pending_confirm:1;
__u8 mono_delivery_time:1;
__u8 mono_delivery_time:1; /* See SKB_MONO_DELIVERY_TIME_MASK */
#ifdef CONFIG_NET_CLS_ACT
__u8 tc_skip_classify:1;
__u8 tc_at_ingress:1;
__u8 tc_at_ingress:1; /* See TC_AT_INGRESS_MASK */
#endif
#ifdef CONFIG_IPV6_NDISC_NODETYPE
__u8 ndisc_nodetype:2;
@ -1062,7 +1062,9 @@ struct sk_buff {
#endif
#define PKT_TYPE_OFFSET offsetof(struct sk_buff, __pkt_type_offset)
/* if you move pkt_vlan_present around you also must adapt these constants */
/* if you move pkt_vlan_present, tc_at_ingress, or mono_delivery_time
* around, you also must adapt these constants.
*/
#ifdef __BIG_ENDIAN_BITFIELD
#define PKT_VLAN_PRESENT_BIT 7
#define TC_AT_INGRESS_MASK (1 << 0)
@ -1073,8 +1075,6 @@ struct sk_buff {
#define SKB_MONO_DELIVERY_TIME_MASK (1 << 5)
#endif
#define PKT_VLAN_PRESENT_OFFSET offsetof(struct sk_buff, __pkt_vlan_present_offset)
#define TC_AT_INGRESS_OFFSET offsetof(struct sk_buff, __pkt_vlan_present_offset)
#define SKB_MONO_DELIVERY_TIME_OFFSET offsetof(struct sk_buff, __pkt_vlan_present_offset)
#ifdef __KERNEL__
/*

40
include/uapi/linux/bpf.h
View File

@ -5090,23 +5090,22 @@ union bpf_attr {
* 0 on success, or a negative error in case of failure. On error
* *dst* buffer is zeroed out.
*
* long bpf_skb_set_delivery_time(struct sk_buff *skb, u64 dtime, u32 dtime_type)
* long bpf_skb_set_tstamp(struct sk_buff *skb, u64 tstamp, u32 tstamp_type)
* Description
* Set a *dtime* (delivery time) to the __sk_buff->tstamp and also
* change the __sk_buff->delivery_time_type to *dtime_type*.
* Change the __sk_buff->tstamp_type to *tstamp_type*
* and set *tstamp* to the __sk_buff->tstamp together.
*
* When setting a delivery time (non zero *dtime*) to
* __sk_buff->tstamp, only BPF_SKB_DELIVERY_TIME_MONO *dtime_type*
* is supported. It is the only delivery_time_type that will be
* kept after bpf_redirect_*().
*
* If there is no need to change the __sk_buff->delivery_time_type,
* the delivery time can be directly written to __sk_buff->tstamp
* If there is no need to change the __sk_buff->tstamp_type,
* the tstamp value can be directly written to __sk_buff->tstamp
* instead.
*
* *dtime* 0 and *dtime_type* BPF_SKB_DELIVERY_TIME_NONE
* can be used to clear any delivery time stored in
* __sk_buff->tstamp.
* BPF_SKB_TSTAMP_DELIVERY_MONO is the only tstamp that
* will be kept during bpf_redirect_*(). A non zero
* *tstamp* must be used with the BPF_SKB_TSTAMP_DELIVERY_MONO
* *tstamp_type*.
*
* A BPF_SKB_TSTAMP_UNSPEC *tstamp_type* can only be used
* with a zero *tstamp*.
*
* Only IPv4 and IPv6 skb->protocol are supported.
*
@ -5119,7 +5118,7 @@ union bpf_attr {
* Return
* 0 on success.
* **-EINVAL** for invalid input
* **-EOPNOTSUPP** for unsupported delivery_time_type and protocol
* **-EOPNOTSUPP** for unsupported protocol
*/
#define __BPF_FUNC_MAPPER(FN) \
FN(unspec), \
@ -5314,7 +5313,7 @@ union bpf_attr {
FN(xdp_load_bytes), \
FN(xdp_store_bytes), \
FN(copy_from_user_task), \
FN(skb_set_delivery_time), \
FN(skb_set_tstamp), \
/* */
/* integer value in 'imm' field of BPF_CALL instruction selects which helper
@ -5505,9 +5504,12 @@ union { \
} __attribute__((aligned(8)))
enum {
BPF_SKB_DELIVERY_TIME_NONE,
BPF_SKB_DELIVERY_TIME_UNSPEC,
BPF_SKB_DELIVERY_TIME_MONO,
BPF_SKB_TSTAMP_UNSPEC,
BPF_SKB_TSTAMP_DELIVERY_MONO, /* tstamp has mono delivery time */
/* For any BPF_SKB_TSTAMP_* that the bpf prog cannot handle,
* the bpf prog should handle it like BPF_SKB_TSTAMP_UNSPEC
* and try to deduce it by ingress, egress or skb->sk->sk_clockid.
*/
};
/* user accessible mirror of in-kernel sk_buff.
@ -5550,7 +5552,7 @@ struct __sk_buff {
__u32 gso_segs;
__bpf_md_ptr(struct bpf_sock *, sk);
__u32 gso_size;
__u8 delivery_time_type;
__u8 tstamp_type;
__u32 :24; /* Padding, future use. */
__u64 hwtstamp;
};

133
net/core/filter.c
View File

@ -7388,36 +7388,36 @@ static const struct bpf_func_proto bpf_sock_ops_reserve_hdr_opt_proto = {
.arg3_type = ARG_ANYTHING,
};
BPF_CALL_3(bpf_skb_set_delivery_time, struct sk_buff *, skb,
u64, dtime, u32, dtime_type)
BPF_CALL_3(bpf_skb_set_tstamp, struct sk_buff *, skb,
u64, tstamp, u32, tstamp_type)
{
/* skb_clear_delivery_time() is done for inet protocol */
if (skb->protocol != htons(ETH_P_IP) &&
skb->protocol != htons(ETH_P_IPV6))
return -EOPNOTSUPP;
switch (dtime_type) {
case BPF_SKB_DELIVERY_TIME_MONO:
if (!dtime)
switch (tstamp_type) {
case BPF_SKB_TSTAMP_DELIVERY_MONO:
if (!tstamp)
return -EINVAL;
skb->tstamp = dtime;
skb->tstamp = tstamp;
skb->mono_delivery_time = 1;
break;
case BPF_SKB_DELIVERY_TIME_NONE:
if (dtime)
case BPF_SKB_TSTAMP_UNSPEC:
if (tstamp)
return -EINVAL;
skb->tstamp = 0;
skb->mono_delivery_time = 0;
break;
default:
return -EOPNOTSUPP;
return -EINVAL;
}
return 0;
}
static const struct bpf_func_proto bpf_skb_set_delivery_time_proto = {
.func = bpf_skb_set_delivery_time,
static const struct bpf_func_proto bpf_skb_set_tstamp_proto = {
.func = bpf_skb_set_tstamp,
.gpl_only = false,
.ret_type = RET_INTEGER,
.arg1_type = ARG_PTR_TO_CTX,
@ -7786,8 +7786,8 @@ tc_cls_act_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog)
return &bpf_tcp_gen_syncookie_proto;
case BPF_FUNC_sk_assign:
return &bpf_sk_assign_proto;
case BPF_FUNC_skb_set_delivery_time:
return &bpf_skb_set_delivery_time_proto;
case BPF_FUNC_skb_set_tstamp:
return &bpf_skb_set_tstamp_proto;
#endif
default:
return bpf_sk_base_func_proto(func_id);
@ -8127,9 +8127,9 @@ static bool bpf_skb_is_valid_access(int off, int size, enum bpf_access_type type
return false;
info->reg_type = PTR_TO_SOCK_COMMON_OR_NULL;
break;
case offsetof(struct __sk_buff, delivery_time_type):
case offsetof(struct __sk_buff, tstamp_type):
return false;
case offsetofend(struct __sk_buff, delivery_time_type) ... offsetof(struct __sk_buff, hwtstamp) - 1:
case offsetofend(struct __sk_buff, tstamp_type) ... offsetof(struct __sk_buff, hwtstamp) - 1:
/* Explicitly prohibit access to padding in __sk_buff. */
return false;
default:
@ -8484,14 +8484,14 @@ static bool tc_cls_act_is_valid_access(int off, int size,
break;
case bpf_ctx_range_till(struct __sk_buff, family, local_port):
return false;
case offsetof(struct __sk_buff, delivery_time_type):
case offsetof(struct __sk_buff, tstamp_type):
/* The convert_ctx_access() on reading and writing
* __sk_buff->tstamp depends on whether the bpf prog
* has used __sk_buff->delivery_time_type or not.
* Thus, we need to set prog->delivery_time_access
* has used __sk_buff->tstamp_type or not.
* Thus, we need to set prog->tstamp_type_access
* earlier during is_valid_access() here.
*/
((struct bpf_prog *)prog)->delivery_time_access = 1;
((struct bpf_prog *)prog)->tstamp_type_access = 1;
return size == sizeof(__u8);
}
@ -8888,42 +8888,22 @@ static u32 flow_dissector_convert_ctx_access(enum bpf_access_type type,
return insn - insn_buf;
}
static struct bpf_insn *bpf_convert_dtime_type_read(const struct bpf_insn *si,
struct bpf_insn *insn)
static struct bpf_insn *bpf_convert_tstamp_type_read(const struct bpf_insn *si,
struct bpf_insn *insn)
{
__u8 value_reg = si->dst_reg;
__u8 skb_reg = si->src_reg;
/* AX is needed because src_reg and dst_reg could be the same */
__u8 tmp_reg = BPF_REG_AX;
*insn++ = BPF_LDX_MEM(BPF_B, tmp_reg, skb_reg,
SKB_MONO_DELIVERY_TIME_OFFSET);
*insn++ = BPF_ALU32_IMM(BPF_AND, tmp_reg,
SKB_MONO_DELIVERY_TIME_MASK);
*insn++ = BPF_JMP32_IMM(BPF_JEQ, tmp_reg, 0, 2);
/* value_reg = BPF_SKB_DELIVERY_TIME_MONO */
*insn++ = BPF_MOV32_IMM(value_reg, BPF_SKB_DELIVERY_TIME_MONO);
*insn++ = BPF_JMP_A(IS_ENABLED(CONFIG_NET_CLS_ACT) ? 10 : 5);
*insn++ = BPF_LDX_MEM(BPF_DW, tmp_reg, skb_reg,
offsetof(struct sk_buff, tstamp));
*insn++ = BPF_JMP_IMM(BPF_JNE, tmp_reg, 0, 2);
/* value_reg = BPF_SKB_DELIVERY_TIME_NONE */
*insn++ = BPF_MOV32_IMM(value_reg, BPF_SKB_DELIVERY_TIME_NONE);
*insn++ = BPF_JMP_A(IS_ENABLED(CONFIG_NET_CLS_ACT) ? 6 : 1);
#ifdef CONFIG_NET_CLS_ACT
*insn++ = BPF_LDX_MEM(BPF_B, tmp_reg, skb_reg, TC_AT_INGRESS_OFFSET);
*insn++ = BPF_ALU32_IMM(BPF_AND, tmp_reg, TC_AT_INGRESS_MASK);
*insn++ = BPF_JMP32_IMM(BPF_JEQ, tmp_reg, 0, 2);
/* At ingress, value_reg = 0 */
*insn++ = BPF_MOV32_IMM(value_reg, 0);
PKT_VLAN_PRESENT_OFFSET);
*insn++ = BPF_JMP32_IMM(BPF_JSET, tmp_reg,
SKB_MONO_DELIVERY_TIME_MASK, 2);
*insn++ = BPF_MOV32_IMM(value_reg, BPF_SKB_TSTAMP_UNSPEC);
*insn++ = BPF_JMP_A(1);
#endif
*insn++ = BPF_MOV32_IMM(value_reg, BPF_SKB_TSTAMP_DELIVERY_MONO);
/* value_reg = BPF_SKB_DELIVERYT_TIME_UNSPEC */
*insn++ = BPF_MOV32_IMM(value_reg, BPF_SKB_DELIVERY_TIME_UNSPEC);
/* 15 insns with CONFIG_NET_CLS_ACT */
return insn;
}
@ -8956,21 +8936,22 @@ static struct bpf_insn *bpf_convert_tstamp_read(const struct bpf_prog *prog,
__u8 skb_reg = si->src_reg;
#ifdef CONFIG_NET_CLS_ACT
if (!prog->delivery_time_access) {
/* If the tstamp_type is read,
* the bpf prog is aware the tstamp could have delivery time.
* Thus, read skb->tstamp as is if tstamp_type_access is true.
*/
if (!prog->tstamp_type_access) {
/* AX is needed because src_reg and dst_reg could be the same */
__u8 tmp_reg = BPF_REG_AX;
*insn++ = BPF_LDX_MEM(BPF_B, tmp_reg, skb_reg, TC_AT_INGRESS_OFFSET);
*insn++ = BPF_ALU32_IMM(BPF_AND, tmp_reg, TC_AT_INGRESS_MASK);
*insn++ = BPF_JMP32_IMM(BPF_JEQ, tmp_reg, 0, 5);
/* @ingress, read __sk_buff->tstamp as the (rcv) timestamp,
* so check the skb->mono_delivery_time.
*/
*insn++ = BPF_LDX_MEM(BPF_B, tmp_reg, skb_reg,
SKB_MONO_DELIVERY_TIME_OFFSET);
*insn++ = BPF_LDX_MEM(BPF_B, tmp_reg, skb_reg, PKT_VLAN_PRESENT_OFFSET);
*insn++ = BPF_ALU32_IMM(BPF_AND, tmp_reg,
SKB_MONO_DELIVERY_TIME_MASK);
*insn++ = BPF_JMP32_IMM(BPF_JEQ, tmp_reg, 0, 2);
/* skb->mono_delivery_time is set, read 0 as the (rcv) timestamp. */
TC_AT_INGRESS_MASK | SKB_MONO_DELIVERY_TIME_MASK);
*insn++ = BPF_JMP32_IMM(BPF_JNE, tmp_reg,
TC_AT_INGRESS_MASK | SKB_MONO_DELIVERY_TIME_MASK, 2);
/* skb->tc_at_ingress && skb->mono_delivery_time,
* read 0 as the (rcv) timestamp.
*/
*insn++ = BPF_MOV64_IMM(value_reg, 0);
*insn++ = BPF_JMP_A(1);
}
@ -8989,25 +8970,27 @@ static struct bpf_insn *bpf_convert_tstamp_write(const struct bpf_prog *prog,
__u8 skb_reg = si->dst_reg;
#ifdef CONFIG_NET_CLS_ACT
if (!prog->delivery_time_access) {
/* If the tstamp_type is read,
* the bpf prog is aware the tstamp could have delivery time.
* Thus, write skb->tstamp as is if tstamp_type_access is true.
* Otherwise, writing at ingress will have to clear the
* mono_delivery_time bit also.
*/
if (!prog->tstamp_type_access) {
__u8 tmp_reg = BPF_REG_AX;
*insn++ = BPF_LDX_MEM(BPF_B, tmp_reg, skb_reg, TC_AT_INGRESS_OFFSET);
*insn++ = BPF_ALU32_IMM(BPF_AND, tmp_reg, TC_AT_INGRESS_MASK);
*insn++ = BPF_JMP32_IMM(BPF_JEQ, tmp_reg, 0, 3);
/* Writing __sk_buff->tstamp at ingress as the (rcv) timestamp.
* Clear the skb->mono_delivery_time.
*/
*insn++ = BPF_LDX_MEM(BPF_B, tmp_reg, skb_reg,
SKB_MONO_DELIVERY_TIME_OFFSET);
*insn++ = BPF_ALU32_IMM(BPF_AND, tmp_reg,
~SKB_MONO_DELIVERY_TIME_MASK);
*insn++ = BPF_STX_MEM(BPF_B, skb_reg, tmp_reg,
SKB_MONO_DELIVERY_TIME_OFFSET);
*insn++ = BPF_LDX_MEM(BPF_B, tmp_reg, skb_reg, PKT_VLAN_PRESENT_OFFSET);
/* Writing __sk_buff->tstamp as ingress, goto <clear> */
*insn++ = BPF_JMP32_IMM(BPF_JSET, tmp_reg, TC_AT_INGRESS_MASK, 1);
/* goto <store> */
*insn++ = BPF_JMP_A(2);
/* <clear>: mono_delivery_time */
*insn++ = BPF_ALU32_IMM(BPF_AND, tmp_reg, ~SKB_MONO_DELIVERY_TIME_MASK);
*insn++ = BPF_STX_MEM(BPF_B, skb_reg, tmp_reg, PKT_VLAN_PRESENT_OFFSET);
}
#endif
/* skb->tstamp = tstamp */
/* <store>: skb->tstamp = tstamp */
*insn++ = BPF_STX_MEM(BPF_DW, skb_reg, value_reg,
offsetof(struct sk_buff, tstamp));
return insn;
@ -9326,8 +9309,8 @@ static u32 bpf_convert_ctx_access(enum bpf_access_type type,
insn = bpf_convert_tstamp_read(prog, si, insn);
break;
case offsetof(struct __sk_buff, delivery_time_type):
insn = bpf_convert_dtime_type_read(si, insn);
case offsetof(struct __sk_buff, tstamp_type):
insn = bpf_convert_tstamp_type_read(si, insn);
break;
case offsetof(struct __sk_buff, gso_segs):

40
tools/include/uapi/linux/bpf.h
View File

@ -5090,23 +5090,22 @@ union bpf_attr {
* 0 on success, or a negative error in case of failure. On error
* *dst* buffer is zeroed out.
*
* long bpf_skb_set_delivery_time(struct sk_buff *skb, u64 dtime, u32 dtime_type)
* long bpf_skb_set_tstamp(struct sk_buff *skb, u64 tstamp, u32 tstamp_type)
* Description
* Set a *dtime* (delivery time) to the __sk_buff->tstamp and also
* change the __sk_buff->delivery_time_type to *dtime_type*.
* Change the __sk_buff->tstamp_type to *tstamp_type*
* and set *tstamp* to the __sk_buff->tstamp together.
*
* When setting a delivery time (non zero *dtime*) to
* __sk_buff->tstamp, only BPF_SKB_DELIVERY_TIME_MONO *dtime_type*
* is supported. It is the only delivery_time_type that will be
* kept after bpf_redirect_*().
*
* If there is no need to change the __sk_buff->delivery_time_type,
* the delivery time can be directly written to __sk_buff->tstamp
* If there is no need to change the __sk_buff->tstamp_type,
* the tstamp value can be directly written to __sk_buff->tstamp
* instead.
*
* *dtime* 0 and *dtime_type* BPF_SKB_DELIVERY_TIME_NONE
* can be used to clear any delivery time stored in
* __sk_buff->tstamp.
* BPF_SKB_TSTAMP_DELIVERY_MONO is the only tstamp that
* will be kept during bpf_redirect_*(). A non zero
* *tstamp* must be used with the BPF_SKB_TSTAMP_DELIVERY_MONO
* *tstamp_type*.
*
* A BPF_SKB_TSTAMP_UNSPEC *tstamp_type* can only be used
* with a zero *tstamp*.
*
* Only IPv4 and IPv6 skb->protocol are supported.
*
@ -5119,7 +5118,7 @@ union bpf_attr {
* Return
* 0 on success.
* **-EINVAL** for invalid input
* **-EOPNOTSUPP** for unsupported delivery_time_type and protocol
* **-EOPNOTSUPP** for unsupported protocol
*/
#define __BPF_FUNC_MAPPER(FN) \
FN(unspec), \
@ -5314,7 +5313,7 @@ union bpf_attr {
FN(xdp_load_bytes), \
FN(xdp_store_bytes), \
FN(copy_from_user_task), \
FN(skb_set_delivery_time), \
FN(skb_set_tstamp), \
/* */
/* integer value in 'imm' field of BPF_CALL instruction selects which helper
@ -5505,9 +5504,12 @@ union { \
} __attribute__((aligned(8)))
enum {
BPF_SKB_DELIVERY_TIME_NONE,
BPF_SKB_DELIVERY_TIME_UNSPEC,
BPF_SKB_DELIVERY_TIME_MONO,
BPF_SKB_TSTAMP_UNSPEC,
BPF_SKB_TSTAMP_DELIVERY_MONO, /* tstamp has mono delivery time */
/* For any BPF_SKB_TSTAMP_* that the bpf prog cannot handle,
* the bpf prog should handle it like BPF_SKB_TSTAMP_UNSPEC
* and try to deduce it by ingress, egress or skb->sk->sk_clockid.
*/
};
/* user accessible mirror of in-kernel sk_buff.
@ -5550,7 +5552,7 @@ struct __sk_buff {
__u32 gso_segs;
__bpf_md_ptr(struct bpf_sock *, sk);
__u32 gso_size;
__u8 delivery_time_type;
__u8 tstamp_type;
__u32 :24; /* Padding, future use. */
__u64 hwtstamp;
};

38
tools/testing/selftests/bpf/progs/test_tc_dtime.c
View File

@ -174,13 +174,13 @@ int egress_host(struct __sk_buff *skb)
return TC_ACT_OK;
if (skb_proto(skb_type) == IPPROTO_TCP) {
if (skb->delivery_time_type == BPF_SKB_DELIVERY_TIME_MONO &&
if (skb->tstamp_type == BPF_SKB_TSTAMP_DELIVERY_MONO &&
skb->tstamp)
inc_dtimes(EGRESS_ENDHOST);
else
inc_errs(EGRESS_ENDHOST);
} else {
if (skb->delivery_time_type == BPF_SKB_DELIVERY_TIME_UNSPEC &&
if (skb->tstamp_type == BPF_SKB_TSTAMP_UNSPEC &&
skb->tstamp)
inc_dtimes(EGRESS_ENDHOST);
else
@ -204,7 +204,7 @@ int ingress_host(struct __sk_buff *skb)
if (!skb_type)
return TC_ACT_OK;
if (skb->delivery_time_type == BPF_SKB_DELIVERY_TIME_MONO &&
if (skb->tstamp_type == BPF_SKB_TSTAMP_DELIVERY_MONO &&
skb->tstamp == EGRESS_FWDNS_MAGIC)
inc_dtimes(INGRESS_ENDHOST);
else
@ -226,7 +226,7 @@ int ingress_fwdns_prio100(struct __sk_buff *skb)
return TC_ACT_OK;
/* delivery_time is only available to the ingress
* if the tc-bpf checks the skb->delivery_time_type.
* if the tc-bpf checks the skb->tstamp_type.
*/
if (skb->tstamp == EGRESS_ENDHOST_MAGIC)
inc_errs(INGRESS_FWDNS_P100);
@ -250,7 +250,7 @@ int egress_fwdns_prio100(struct __sk_buff *skb)
return TC_ACT_OK;
/* delivery_time is always available to egress even
* the tc-bpf did not use the delivery_time_type.
* the tc-bpf did not use the tstamp_type.
*/
if (skb->tstamp == INGRESS_FWDNS_MAGIC)
inc_dtimes(EGRESS_FWDNS_P100);
@ -278,9 +278,9 @@ int ingress_fwdns_prio101(struct __sk_buff *skb)
if (skb_proto(skb_type) == IPPROTO_UDP)
expected_dtime = 0;
if (skb->delivery_time_type) {
if (skb->tstamp_type) {
if (fwdns_clear_dtime() ||
skb->delivery_time_type != BPF_SKB_DELIVERY_TIME_MONO ||
skb->tstamp_type != BPF_SKB_TSTAMP_DELIVERY_MONO ||
skb->tstamp != expected_dtime)
inc_errs(INGRESS_FWDNS_P101);
else
@ -290,14 +290,14 @@ int ingress_fwdns_prio101(struct __sk_buff *skb)
inc_errs(INGRESS_FWDNS_P101);
}
if (skb->delivery_time_type == BPF_SKB_DELIVERY_TIME_MONO) {
if (skb->tstamp_type == BPF_SKB_TSTAMP_DELIVERY_MONO) {
skb->tstamp = INGRESS_FWDNS_MAGIC;
} else {
if (bpf_skb_set_delivery_time(skb, INGRESS_FWDNS_MAGIC,
BPF_SKB_DELIVERY_TIME_MONO))
if (bpf_skb_set_tstamp(skb, INGRESS_FWDNS_MAGIC,
BPF_SKB_TSTAMP_DELIVERY_MONO))
inc_errs(SET_DTIME);
if (!bpf_skb_set_delivery_time(skb, INGRESS_FWDNS_MAGIC,
BPF_SKB_DELIVERY_TIME_UNSPEC))
if (!bpf_skb_set_tstamp(skb, INGRESS_FWDNS_MAGIC,
BPF_SKB_TSTAMP_UNSPEC))
inc_errs(SET_DTIME);
}
@ -320,9 +320,9 @@ int egress_fwdns_prio101(struct __sk_buff *skb)
/* Should have handled in prio100 */
return TC_ACT_SHOT;
if (skb->delivery_time_type) {
if (skb->tstamp_type) {
if (fwdns_clear_dtime() ||
skb->delivery_time_type != BPF_SKB_DELIVERY_TIME_MONO ||
skb->tstamp_type != BPF_SKB_TSTAMP_DELIVERY_MONO ||
skb->tstamp != INGRESS_FWDNS_MAGIC)
inc_errs(EGRESS_FWDNS_P101);
else
@ -332,14 +332,14 @@ int egress_fwdns_prio101(struct __sk_buff *skb)
inc_errs(EGRESS_FWDNS_P101);
}
if (skb->delivery_time_type == BPF_SKB_DELIVERY_TIME_MONO) {
if (skb->tstamp_type == BPF_SKB_TSTAMP_DELIVERY_MONO) {
skb->tstamp = EGRESS_FWDNS_MAGIC;
} else {
if (bpf_skb_set_delivery_time(skb, EGRESS_FWDNS_MAGIC,
BPF_SKB_DELIVERY_TIME_MONO))
if (bpf_skb_set_tstamp(skb, EGRESS_FWDNS_MAGIC,
BPF_SKB_TSTAMP_DELIVERY_MONO))
inc_errs(SET_DTIME);
if (!bpf_skb_set_delivery_time(skb, EGRESS_FWDNS_MAGIC,
BPF_SKB_DELIVERY_TIME_UNSPEC))
if (!bpf_skb_set_tstamp(skb, INGRESS_FWDNS_MAGIC,
BPF_SKB_TSTAMP_UNSPEC))
inc_errs(SET_DTIME);
}