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| author | David S. Miller <davem@davemloft.net> | 2017-01-03 17:00:28 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-01-03 17:00:28 +0100 |
| commit | aa276dd7b3fcc04b4a9c056a496d69271b7da8da (patch) | |
| tree | 43dbb39df8034667faa990693f2b6d3a1b471aad /net/packet/af_packet.c | |
| parent | sfc-falcon: declare module version (same as ethtool drvinfo version) (diff) | |
| parent | tools: test case for TPACKET_V3/TX_RING support (diff) | |
| download | linux-aa276dd7b3fcc04b4a9c056a496d69271b7da8da.tar.xz linux-aa276dd7b3fcc04b4a9c056a496d69271b7da8da.zip | |
Merge branch 'TPACKET_V3-TX_RING-support'
Sowmini Varadhan says:
====================
TPACKET_V3 TX_RING support
This patch series allows an application to use a single PF_PACKET
descriptor and leverage the best implementations of TX_RING
and RX_RING that exist today.
Patch 1 adds the kernel/Documentation changes for TX_RING
support and patch2 adds the associated test case in selftests.
Changes since v2: additional sanity checks for setsockopt
input for TX_RING/TPACKET_V3. Refactored psock_tpacket.c
test code to avoid code duplication from V2.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/packet/af_packet.c')
| -rw-r--r-- | net/packet/af_packet.c | 39 |
1 files changed, 30 insertions, 9 deletions
diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c index b9e1a13b4ba3..7e39087d519b 100644 --- a/net/packet/af_packet.c +++ b/net/packet/af_packet.c @@ -409,6 +409,9 @@ static void __packet_set_status(struct packet_sock *po, void *frame, int status) flush_dcache_page(pgv_to_page(&h.h2->tp_status)); break; case TPACKET_V3: + h.h3->tp_status = status; + flush_dcache_page(pgv_to_page(&h.h3->tp_status)); + break; default: WARN(1, "TPACKET version not supported.\n"); BUG(); @@ -432,6 +435,8 @@ static int __packet_get_status(struct packet_sock *po, void *frame) flush_dcache_page(pgv_to_page(&h.h2->tp_status)); return h.h2->tp_status; case TPACKET_V3: + flush_dcache_page(pgv_to_page(&h.h3->tp_status)); + return h.h3->tp_status; default: WARN(1, "TPACKET version not supported.\n"); BUG(); @@ -2497,6 +2502,13 @@ static int tpacket_parse_header(struct packet_sock *po, void *frame, ph.raw = frame; switch (po->tp_version) { + case TPACKET_V3: + if (ph.h3->tp_next_offset != 0) { + pr_warn_once("variable sized slot not supported"); + return -EINVAL; + } + tp_len = ph.h3->tp_len; + break; case TPACKET_V2: tp_len = ph.h2->tp_len; break; @@ -2516,6 +2528,9 @@ static int tpacket_parse_header(struct packet_sock *po, void *frame, off_max = po->tx_ring.frame_size - tp_len; if (po->sk.sk_type == SOCK_DGRAM) { switch (po->tp_version) { + case TPACKET_V3: + off = ph.h3->tp_net; + break; case TPACKET_V2: off = ph.h2->tp_net; break; @@ -2525,6 +2540,9 @@ static int tpacket_parse_header(struct packet_sock *po, void *frame, } } else { switch (po->tp_version) { + case TPACKET_V3: + off = ph.h3->tp_mac; + break; case TPACKET_V2: off = ph.h2->tp_mac; break; @@ -4113,11 +4131,6 @@ static int packet_set_ring(struct sock *sk, union tpacket_req_u *req_u, struct tpacket_req *req = &req_u->req; lock_sock(sk); - /* Opening a Tx-ring is NOT supported in TPACKET_V3 */ - if (!closing && tx_ring && (po->tp_version > TPACKET_V2)) { - net_warn_ratelimited("Tx-ring is not supported.\n"); - goto out; - } rb = tx_ring ? &po->tx_ring : &po->rx_ring; rb_queue = tx_ring ? &sk->sk_write_queue : &sk->sk_receive_queue; @@ -4177,11 +4190,19 @@ static int packet_set_ring(struct sock *sk, union tpacket_req_u *req_u, goto out; switch (po->tp_version) { case TPACKET_V3: - /* Transmit path is not supported. We checked - * it above but just being paranoid - */ - if (!tx_ring) + /* Block transmit is not supported yet */ + if (!tx_ring) { init_prb_bdqc(po, rb, pg_vec, req_u); + } else { + struct tpacket_req3 *req3 = &req_u->req3; + + if (req3->tp_retire_blk_tov || + req3->tp_sizeof_priv || + req3->tp_feature_req_word) { + err = -EINVAL; + goto out; + } + } break; default: break; |