/* * Copyright (c) 2005 Andrea Bittau * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #ifndef _DCCP_CCID2_H_ #define _DCCP_CCID2_H_ #include #include #include "../ccid.h" #include "../dccp.h" /* * CCID-2 timestamping faces the same issues as TCP timestamping. * Hence we reuse/share as much of the code as possible. */ #define ccid2_time_stamp tcp_time_stamp /* NUMDUPACK parameter from RFC 4341, p. 6 */ #define NUMDUPACK 3 struct ccid2_seq { u64 ccid2s_seq; u32 ccid2s_sent; int ccid2s_acked; struct ccid2_seq *ccid2s_prev; struct ccid2_seq *ccid2s_next; }; #define CCID2_SEQBUF_LEN 1024 #define CCID2_SEQBUF_MAX 128 /* * Multiple of congestion window to keep the sequence window at * (RFC 4340 7.5.2) */ #define CCID2_WIN_CHANGE_FACTOR 5 /** * struct ccid2_hc_tx_sock - CCID2 TX half connection * @tx_{cwnd,ssthresh,pipe}: as per RFC 4341, section 5 * @tx_packets_acked: Ack counter for deriving cwnd growth (RFC 3465) * @tx_srtt: smoothed RTT estimate, scaled by 2^3 * @tx_mdev: smoothed RTT variation, scaled by 2^2 * @tx_mdev_max: maximum of @mdev during one flight * @tx_rttvar: moving average/maximum of @mdev_max * @tx_rto: RTO value deriving from SRTT and RTTVAR (RFC 2988) * @tx_rtt_seq: to decay RTTVAR at most once per flight * @tx_cwnd_used: actually used cwnd, W_used of RFC 2861 * @tx_expected_wnd: moving average of @tx_cwnd_used * @tx_cwnd_stamp: to track idle periods in CWV * @tx_lsndtime: last time (in jiffies) a data packet was sent * @tx_rpseq: last consecutive seqno * @tx_rpdupack: dupacks since rpseq * @tx_av_chunks: list of Ack Vectors received on current skb */ struct ccid2_hc_tx_sock { u32 tx_cwnd; u32 tx_ssthresh; u32 tx_pipe; u32 tx_packets_acked; struct ccid2_seq *tx_seqbuf[CCID2_SEQBUF_MAX]; int tx_seqbufc; struct ccid2_seq *tx_seqh; struct ccid2_seq *tx_seqt; /* RTT measurement: variables/principles are the same as in TCP */ u32 tx_srtt, tx_mdev, tx_mdev_max, tx_rttvar, tx_rto; u64 tx_rtt_seq:48; struct timer_list tx_rtotimer; /* Congestion Window validation (optional, RFC 2861) */ u32 tx_cwnd_used, tx_expected_wnd, tx_cwnd_stamp, tx_lsndtime; u64 tx_rpseq; int tx_rpdupack; u32 tx_last_cong; u64 tx_high_ack; struct list_head tx_av_chunks; }; static inline bool ccid2_cwnd_network_limited(struct ccid2_hc_tx_sock *hc) { return hc->tx_pipe >= hc->tx_cwnd; } /* * Convert RFC 3390 larger initial window into an equivalent number of packets. * This is based on the numbers specified in RFC 5681, 3.1. */ static inline u32 rfc3390_bytes_to_packets(const u32 smss) { return smss <= 1095 ? 4 : (smss > 2190 ? 2 : 3); } /** * struct ccid2_hc_rx_sock - Receiving end of CCID-2 half-connection * @rx_num_data_pkts: number of data packets received since last feedback */ struct ccid2_hc_rx_sock { u32 rx_num_data_pkts; }; static inline struct ccid2_hc_tx_sock *ccid2_hc_tx_sk(const struct sock *sk) { return ccid_priv(dccp_sk(sk)->dccps_hc_tx_ccid); } static inline struct ccid2_hc_rx_sock *ccid2_hc_rx_sk(const struct sock *sk) { return ccid_priv(dccp_sk(sk)->dccps_hc_rx_ccid); } #endif /* _DCCP_CCID2_H_ */ ion value='30'>30space:mode:
authorDaniel Vetter <daniel.vetter@ffwll.ch>2017-01-12 17:15:56 +0100
committerDaniel Vetter <daniel.vetter@ffwll.ch>2017-01-30 10:17:32 +0100
commite6e7b48b295afa5a5ab440de0a94d9ad8b3ce2d0 (patch)
tree77cadb6d8aad1b52c34e4afa8c9deef603bbe2ed /net/strparser
parent4e5b54f127426c82dc2816340c26d951a5bb3429 (diff)
drm: Don't race connector registration
I was under the misconception that the sysfs dev stuff can be fully set up, and then registered all in one step with device_add. That's true for properties and property groups, but not for parents and child devices. Those must be fully registered before you can register a child. Add a bit of tracking to make sure that asynchronous mst connector hotplugging gets this right. For consistency we rely upon the implicit barriers of the connector->mutex, which is taken anyway, to ensure that at least either the connector or device registration call will work out. Mildly tested since I can't reliably reproduce this on my mst box here. Reported-by: Dave Hansen <dave.hansen@intel.com> Cc: Dave Hansen <dave.hansen@intel.com> Acked-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1484237756-2720-1-git-send-email-daniel.vetter@ffwll.ch
Diffstat (limited to 'net/strparser')