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IB/uverbs: Add support for flow tag

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The struct ib_uverbs_flow_spec_action_tag associates a tag_id with the
flow defined by any number of other flow_spec entries which can reference
L2, L3, and L4 packet contents.

Use of ib_uverbs_flow_spec_action_tag allows the consumer to identify
the set of rules which where matched by
the packet by examining the tag_id in the CQE.

Signed-off-by: Moses Reuben <mosesr@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Moses Reuben 2017-01-18 14:59:49 +02:00 committed by Doug Ledford
parent 460d019860
commit 94e03f11ad
3 changed files with 47 additions and 2 deletions
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1
drivers/infiniband/core/uverbs.h
View File

@ -228,6 +228,7 @@ struct ib_uverbs_flow_spec {
struct ib_uverbs_flow_spec_ipv4 ipv4;
struct ib_uverbs_flow_spec_tcp_udp tcp_udp;
struct ib_uverbs_flow_spec_ipv6 ipv6;
struct ib_uverbs_flow_spec_action_tag flow_tag;
};
};

35
drivers/infiniband/core/uverbs_cmd.c
View File

@ -3143,6 +3143,25 @@ out_put:
return ret ? ret : in_len;
}
static int kern_spec_to_ib_spec_action(struct ib_uverbs_flow_spec *kern_spec,
union ib_flow_spec *ib_spec)
{
ib_spec->type = kern_spec->type;
switch (ib_spec->type) {
case IB_FLOW_SPEC_ACTION_TAG:
if (kern_spec->flow_tag.size !=
sizeof(struct ib_uverbs_flow_spec_action_tag))
return -EINVAL;
ib_spec->flow_tag.size = sizeof(struct ib_flow_spec_action_tag);
ib_spec->flow_tag.tag_id = kern_spec->flow_tag.tag_id;
break;
default:
return -EINVAL;
}
return 0;
}
static size_t kern_spec_filter_sz(struct ib_uverbs_flow_spec_hdr *spec)
{
/* Returns user space filter size, includes padding */
@ -3167,8 +3186,8 @@ static ssize_t spec_filter_size(void *kern_spec_filter, u16 kern_filter_size,
return kern_filter_size;
}
static int kern_spec_to_ib_spec(struct ib_uverbs_flow_spec *kern_spec,
union ib_flow_spec *ib_spec)
static int kern_spec_to_ib_spec_filter(struct ib_uverbs_flow_spec *kern_spec,
union ib_flow_spec *ib_spec)
{
ssize_t actual_filter_sz;
ssize_t kern_filter_sz;
@ -3263,6 +3282,18 @@ static int kern_spec_to_ib_spec(struct ib_uverbs_flow_spec *kern_spec,
return 0;
}
static int kern_spec_to_ib_spec(struct ib_uverbs_flow_spec *kern_spec,
union ib_flow_spec *ib_spec)
{
if (kern_spec->reserved)
return -EINVAL;
if (kern_spec->type >= IB_FLOW_SPEC_ACTION_TAG)
return kern_spec_to_ib_spec_action(kern_spec, ib_spec);
else
return kern_spec_to_ib_spec_filter(kern_spec, ib_spec);
}
int ib_uverbs_ex_create_wq(struct ib_uverbs_file *file,
struct ib_device *ib_dev,
struct ib_udata *ucore,

13
include/uapi/rdma/ib_user_verbs.h
View File

@ -929,6 +929,19 @@ struct ib_uverbs_flow_spec_ipv6 {
struct ib_uverbs_flow_ipv6_filter mask;
};
struct ib_uverbs_flow_spec_action_tag {
union {
struct ib_uverbs_flow_spec_hdr hdr;
struct {
__u32 type;
__u16 size;
__u16 reserved;
};
};
__u32 tag_id;
__u32 reserved1;
};
struct ib_uverbs_flow_tunnel_filter {
__be32 tunnel_id;
};