#ifndef _TFRC_H_ #define _TFRC_H_ /* * Copyright (c) 2007 The University of Aberdeen, Scotland, UK * Copyright (c) 2005-6 The University of Waikato, Hamilton, New Zealand. * Copyright (c) 2005-6 Ian McDonald * Copyright (c) 2005 Arnaldo Carvalho de Melo * Copyright (c) 2003 Nils-Erik Mattsson, Joacim Haggmark, Magnus Erixzon * * 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. */ #include #include #include "../../dccp.h" /* internal includes that this library exports: */ #include "loss_interval.h" #include "packet_history.h" #ifdef CONFIG_IP_DCCP_TFRC_DEBUG extern bool tfrc_debug; #define tfrc_pr_debug(format, a...) DCCP_PR_DEBUG(tfrc_debug, format, ##a) #else #define tfrc_pr_debug(format, a...) #endif /* integer-arithmetic divisions of type (a * 1000000)/b */ static inline u64 scaled_div(u64 a, u64 b) { BUG_ON(b == 0); return div64_u64(a * 1000000, b); } static inline u32 scaled_div32(u64 a, u64 b) { u64 result = scaled_div(a, b); if (result > UINT_MAX) { DCCP_CRIT("Overflow: %llu/%llu > UINT_MAX", (unsigned long long)a, (unsigned long long)b); return UINT_MAX; } return result; } /** * tfrc_ewma - Exponentially weighted moving average * @weight: Weight to be used as damping factor, in units of 1/10 */ static inline u32 tfrc_ewma(const u32 avg, const u32 newval, const u8 weight) { return avg ? (weight * avg + (10 - weight) * newval) / 10 : newval; } u32 tfrc_calc_x(u16 s, u32 R, u32 p); u32 tfrc_calc_x_reverse_lookup(u32 fvalue); u32 tfrc_invert_loss_event_rate(u32 loss_event_rate); int tfrc_tx_packet_history_init(void); void tfrc_tx_packet_history_exit(void); int tfrc_rx_packet_history_init(void); void tfrc_rx_packet_history_exit(void); int tfrc_li_init(void); void tfrc_li_exit(void); #ifdef CONFIG_IP_DCCP_TFRC_LIB int tfrc_lib_init(void); void tfrc_lib_exit(void); #else #define tfrc_lib_init() (0) #define tfrc_lib_exit() #endif #endif /* _TFRC_H_ */ 6feb4a'>diff
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authorTejun Heo <tj@kernel.org>2017-01-26 16:47:28 -0500
committerTejun Heo <tj@kernel.org>2017-01-26 16:47:28 -0500
commit07cd12945551b63ecb1a349d50a6d69d1d6feb4a (patch)
tree75f65eba7eac9277971082a2d5a4cf1370562c0c /include/net/inet_connection_sock.h
parent7ce7d89f48834cefece7804d38fc5d85382edf77 (diff)
cgroup: don't online subsystems before cgroup_name/path() are operational
While refactoring cgroup creation, a5bca2152036 ("cgroup: factor out cgroup_create() out of cgroup_mkdir()") incorrectly onlined subsystems before the new cgroup is associated with it kernfs_node. This is fine for cgroup proper but cgroup_name/path() depend on the associated kernfs_node and if a subsystem makes the new cgroup_subsys_state visible, which they're allowed to after onlining, it can lead to NULL dereference. The current code performs cgroup creation and subsystem onlining in cgroup_create() and cgroup_mkdir() makes the cgroup and subsystems visible afterwards. There's no reason to online the subsystems early and we can simply drop cgroup_apply_control_enable() call from cgroup_create() so that the subsystems are onlined and made visible at the same time. Signed-off-by: Tejun Heo <tj@kernel.org> Reported-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru> Fixes: a5bca2152036 ("cgroup: factor out cgroup_create() out of cgroup_mkdir()") Cc: stable@vger.kernel.org # v4.6+
Diffstat (limited to 'include/net/inet_connection_sock.h')