/* * Main header file for the ALSA sequencer * Copyright (c) 1998-1999 by Frank van de Pol * (c) 1998-1999 by Jaroslav Kysela * * * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * */ #ifndef __SOUND_ASEQUENCER_H #define __SOUND_ASEQUENCER_H #include #include #include /* helper macro */ #define snd_seq_event_bounce_ext_data(ev) ((void*)((char *)(ev)->data.ext.ptr + sizeof(struct snd_seq_event_bounce))) /* * type check macros */ /* result events: 0-4 */ #define snd_seq_ev_is_result_type(ev) ((ev)->type < 5) /* channel specific events: 5-19 */ #define snd_seq_ev_is_channel_type(ev) ((ev)->type >= 5 && (ev)->type < 20) /* note events: 5-9 */ #define snd_seq_ev_is_note_type(ev) ((ev)->type >= 5 && (ev)->type < 10) /* control events: 10-19 */ #define snd_seq_ev_is_control_type(ev) ((ev)->type >= 10 && (ev)->type < 20) /* queue control events: 30-39 */ #define snd_seq_ev_is_queue_type(ev) ((ev)->type >= 30 && (ev)->type < 40) /* system status messages */ #define snd_seq_ev_is_message_type(ev) ((ev)->type >= 60 && (ev)->type < 69) /* sample messages */ #define snd_seq_ev_is_sample_type(ev) ((ev)->type >= 70 && (ev)->type < 79) /* user-defined messages */ #define snd_seq_ev_is_user_type(ev) ((ev)->type >= 90 && (ev)->type < 99) /* fixed length events: 0-99 */ #define snd_seq_ev_is_fixed_type(ev) ((ev)->type < 100) /* variable length events: 130-139 */ #define snd_seq_ev_is_variable_type(ev) ((ev)->type >= 130 && (ev)->type < 140) /* reserved for kernel */ #define snd_seq_ev_is_reserved(ev) ((ev)->type >= 150) /* direct dispatched events */ #define snd_seq_ev_is_direct(ev) ((ev)->queue == SNDRV_SEQ_QUEUE_DIRECT) /* * macros to check event flags */ /* prior events */ #define snd_seq_ev_is_prior(ev) (((ev)->flags & SNDRV_SEQ_PRIORITY_MASK) == SNDRV_SEQ_PRIORITY_HIGH) /* event length type */ #define snd_seq_ev_length_type(ev) ((ev)->flags & SNDRV_SEQ_EVENT_LENGTH_MASK) #define snd_seq_ev_is_fixed(ev) (snd_seq_ev_length_type(ev) == SNDRV_SEQ_EVENT_LENGTH_FIXED) #define snd_seq_ev_is_variable(ev) (snd_seq_ev_length_type(ev) == SNDRV_SEQ_EVENT_LENGTH_VARIABLE) #define snd_seq_ev_is_varusr(ev) (snd_seq_ev_length_type(ev) == SNDRV_SEQ_EVENT_LENGTH_VARUSR) /* time-stamp type */ #define snd_seq_ev_timestamp_type(ev) ((ev)->flags & SNDRV_SEQ_TIME_STAMP_MASK) #define snd_seq_ev_is_tick(ev) (snd_seq_ev_timestamp_type(ev) == SNDRV_SEQ_TIME_STAMP_TICK) #define snd_seq_ev_is_real(ev) (snd_seq_ev_timestamp_type(ev) == SNDRV_SEQ_TIME_STAMP_REAL) /* time-mode type */ #define snd_seq_ev_timemode_type(ev) ((ev)->flags & SNDRV_SEQ_TIME_MODE_MASK) #define snd_seq_ev_is_abstime(ev) (snd_seq_ev_timemode_type(ev) == SNDRV_SEQ_TIME_MODE_ABS) #define snd_seq_ev_is_reltime(ev) (snd_seq_ev_timemode_type(ev) == SNDRV_SEQ_TIME_MODE_REL) /* queue sync port */ #define snd_seq_queue_sync_port(q) ((q) + 16) #endif /* __SOUND_ASEQUENCER_H */ ion>space:mode:
authorDexuan Cui <decui@microsoft.com>2017-01-28 11:46:02 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-01-31 10:59:48 +0100
commit433e19cf33d34bb6751c874a9c00980552fe508c (patch)
treece6547ef2987fbb289fa28f03536328a42781651 /net/packet
parent191e885a2e130e639bb0c8ee350d7047294f2ce6 (diff)
Drivers: hv: vmbus: finally fix hv_need_to_signal_on_read()
Commit a389fcfd2cb5 ("Drivers: hv: vmbus: Fix signaling logic in hv_need_to_signal_on_read()") added the proper mb(), but removed the test "prev_write_sz < pending_sz" when making the signal decision. As a result, the guest can signal the host unnecessarily, and then the host can throttle the guest because the host thinks the guest is buggy or malicious; finally the user running stress test can perceive intermittent freeze of the guest. This patch brings back the test, and properly handles the in-place consumption APIs used by NetVSC (see get_next_pkt_raw(), put_pkt_raw() and commit_rd_index()). Fixes: a389fcfd2cb5 ("Drivers: hv: vmbus: Fix signaling logic in hv_need_to_signal_on_read()") Signed-off-by: Dexuan Cui <decui@microsoft.com> Reported-by: Rolf Neugebauer <rolf.neugebauer@docker.com> Tested-by: Rolf Neugebauer <rolf.neugebauer@docker.com> Cc: "K. Y. Srinivasan" <kys@microsoft.com> Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: Stephen Hemminger <sthemmin@microsoft.com> Cc: <stable@vger.kernel.org> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/packet')