From: "Björn Töpel" <bjorn.topel@gmail.com>
To: ast@kernel.org, daniel@iogearbox.net, netdev@vger.kernel.org,
bpf@vger.kernel.org
Cc: "Björn Töpel" <bjorn.topel@intel.com>,
magnus.karlsson@intel.com, maciej.fijalkowski@intel.com,
kuba@kernel.org, jonathan.lemon@gmail.com, maximmi@nvidia.com,
davem@davemloft.net, hawk@kernel.org, john.fastabend@gmail.com,
ciara.loftus@intel.com, weqaar.a.janjua@intel.com
Subject: [PATCH bpf-next v2 2/8] xsk: remove explicit_free parameter from __xsk_rcv()
Date: Tue, 19 Jan 2021 16:50:07 +0100 [thread overview]
Message-ID: <20210119155013.154808-3-bjorn.topel@gmail.com> (raw)
In-Reply-To: <20210119155013.154808-1-bjorn.topel@gmail.com>
From: Björn Töpel <bjorn.topel@intel.com>
The explicit_free parameter of the __xsk_rcv() function was used to
mark whether the call was via the generic XDP or the native XDP
path. Instead of clutter the code with if-statements and "true/false"
parameters which are hard to understand, simply move the explicit free
to the __xsk_map_redirect() which is always called from the native XDP
path.
Reviewed-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Signed-off-by: Björn Töpel <bjorn.topel@intel.com>
---
net/xdp/xsk.c | 47 +++++++++++++++++++++++++++++++----------------
1 file changed, 31 insertions(+), 16 deletions(-)
diff --git a/net/xdp/xsk.c b/net/xdp/xsk.c
index 8037b04a9edd..5820de65060b 100644
--- a/net/xdp/xsk.c
+++ b/net/xdp/xsk.c
@@ -184,12 +184,13 @@ static void xsk_copy_xdp(struct xdp_buff *to, struct xdp_buff *from, u32 len)
memcpy(to_buf, from_buf, len + metalen);
}
-static int __xsk_rcv(struct xdp_sock *xs, struct xdp_buff *xdp, u32 len,
- bool explicit_free)
+static int __xsk_rcv(struct xdp_sock *xs, struct xdp_buff *xdp)
{
struct xdp_buff *xsk_xdp;
int err;
+ u32 len;
+ len = xdp->data_end - xdp->data;
if (len > xsk_pool_get_rx_frame_size(xs->pool)) {
xs->rx_dropped++;
return -ENOSPC;
@@ -207,8 +208,6 @@ static int __xsk_rcv(struct xdp_sock *xs, struct xdp_buff *xdp, u32 len,
xsk_buff_free(xsk_xdp);
return err;
}
- if (explicit_free)
- xdp_return_buff(xdp);
return 0;
}
@@ -230,11 +229,8 @@ static bool xsk_is_bound(struct xdp_sock *xs)
return false;
}
-static int xsk_rcv(struct xdp_sock *xs, struct xdp_buff *xdp,
- bool explicit_free)
+static int xsk_rcv_check(struct xdp_sock *xs, struct xdp_buff *xdp)
{
- u32 len;
-
if (!xsk_is_bound(xs))
return -EINVAL;
@@ -242,11 +238,7 @@ static int xsk_rcv(struct xdp_sock *xs, struct xdp_buff *xdp,
return -EINVAL;
sk_mark_napi_id_once_xdp(&xs->sk, xdp);
- len = xdp->data_end - xdp->data;
-
- return xdp->rxq->mem.type == MEM_TYPE_XSK_BUFF_POOL ?
- __xsk_rcv_zc(xs, xdp, len) :
- __xsk_rcv(xs, xdp, len, explicit_free);
+ return 0;
}
static void xsk_flush(struct xdp_sock *xs)
@@ -261,18 +253,41 @@ int xsk_generic_rcv(struct xdp_sock *xs, struct xdp_buff *xdp)
int err;
spin_lock_bh(&xs->rx_lock);
- err = xsk_rcv(xs, xdp, false);
- xsk_flush(xs);
+ err = xsk_rcv_check(xs, xdp);
+ if (!err) {
+ err = __xsk_rcv(xs, xdp);
+ xsk_flush(xs);
+ }
spin_unlock_bh(&xs->rx_lock);
return err;
}
+static int xsk_rcv(struct xdp_sock *xs, struct xdp_buff *xdp)
+{
+ int err;
+ u32 len;
+
+ err = xsk_rcv_check(xs, xdp);
+ if (err)
+ return err;
+
+ if (xdp->rxq->mem.type == MEM_TYPE_XSK_BUFF_POOL) {
+ len = xdp->data_end - xdp->data;
+ return __xsk_rcv_zc(xs, xdp, len);
+ }
+
+ err = __xsk_rcv(xs, xdp);
+ if (!err)
+ xdp_return_buff(xdp);
+ return err;
+}
+
int __xsk_map_redirect(struct xdp_sock *xs, struct xdp_buff *xdp)
{
struct list_head *flush_list = this_cpu_ptr(&xskmap_flush_list);
int err;
- err = xsk_rcv(xs, xdp, true);
+ err = xsk_rcv(xs, xdp);
if (err)
return err;
--
2.27.0
next prev parent reply other threads:[~2021-01-19 18:29 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-19 15:50 [PATCH bpf-next v2 0/8] Introduce bpf_redirect_xsk() helper Björn Töpel
2021-01-19 15:50 ` [PATCH bpf-next v2 1/8] xdp: restructure redirect actions Björn Töpel
2021-01-20 12:44 ` Toke Høiland-Jørgensen
2021-01-20 13:40 ` Björn Töpel
2021-01-20 14:52 ` Toke Høiland-Jørgensen
2021-01-20 15:49 ` Björn Töpel
2021-01-20 16:30 ` Toke Høiland-Jørgensen
2021-01-20 17:26 ` Björn Töpel
2021-01-19 15:50 ` Björn Töpel [this message]
2021-01-19 15:50 ` [PATCH bpf-next v2 3/8] xsk: fold xp_assign_dev and __xp_assign_dev Björn Töpel
2021-01-19 15:50 ` [PATCH bpf-next v2 4/8] xsk: register XDP sockets at bind(), and add new AF_XDP BPF helper Björn Töpel
2021-01-20 8:25 ` kernel test robot
2021-01-20 8:41 ` Björn Töpel
2021-01-20 8:50 ` kernel test robot
2021-01-20 12:50 ` Toke Høiland-Jørgensen
2021-01-20 13:25 ` Björn Töpel
2021-01-20 14:54 ` Toke Høiland-Jørgensen
2021-01-20 15:18 ` Björn Töpel
2021-01-20 17:29 ` Toke Høiland-Jørgensen
2021-01-20 18:22 ` Björn Töpel
2021-01-20 20:26 ` Toke Høiland-Jørgensen
2021-01-20 21:15 ` Alexei Starovoitov
2021-01-21 8:18 ` Björn Töpel
2021-01-19 15:50 ` [PATCH bpf-next v2 5/8] libbpf, xsk: select AF_XDP BPF program based on kernel version Björn Töpel
2021-01-20 12:52 ` Toke Høiland-Jørgensen
2021-01-20 13:25 ` Björn Töpel
2021-01-20 14:49 ` Björn Töpel
2021-01-20 15:11 ` Toke Høiland-Jørgensen
2021-01-20 15:27 ` Björn Töpel
2021-01-20 17:30 ` Toke Høiland-Jørgensen
2021-01-20 18:25 ` Alexei Starovoitov
2021-01-20 18:30 ` Björn Töpel
2021-01-20 14:56 ` Toke Høiland-Jørgensen
2021-01-19 15:50 ` [PATCH bpf-next v2 6/8] libbpf, xsk: select bpf_redirect_xsk(), if supported Björn Töpel
2021-01-19 15:50 ` [PATCH bpf-next v2 7/8] selftest/bpf: add XDP socket tests for bpf_redirect_{xsk, map}() Björn Töpel
2021-01-21 7:39 ` Andrii Nakryiko
2021-01-21 12:31 ` Björn Töpel
2021-01-19 15:50 ` [PATCH bpf-next v2 8/8] selftest/bpf: remove a lot of ifobject casting in xdpxceiver Björn Töpel
2021-01-20 13:15 ` [PATCH bpf-next v2 0/8] Introduce bpf_redirect_xsk() helper Maxim Mikityanskiy
2021-01-20 13:27 ` Björn Töpel
2021-01-20 15:57 ` Jesper Dangaard Brouer
2021-01-20 16:19 ` Maciej Fijalkowski
2021-01-21 17:01 ` Jesper Dangaard Brouer
2021-01-22 8:59 ` Magnus Karlsson
2021-01-22 9:45 ` Maciej Fijalkowski
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