![Linus Torvalds](/assets/img/avatar_default.png)
Pull networking updates from David Miller: 1) BBR TCP congestion control, from Neal Cardwell, Yuchung Cheng and co. at Google. https://lwn.net/Articles/701165/ 2) Do TCP Small Queues for retransmits, from Eric Dumazet. 3) Support collect_md mode for all IPV4 and IPV6 tunnels, from Alexei Starovoitov. 4) Allow cls_flower to classify packets in ip tunnels, from Amir Vadai. 5) Support DSA tagging in older mv88e6xxx switches, from Andrew Lunn. 6) Support GMAC protocol in iwlwifi mwm, from Ayala Beker. 7) Support ndo_poll_controller in mlx5, from Calvin Owens. 8) Move VRF processing to an output hook and allow l3mdev to be loopback, from David Ahern. 9) Support SOCK_DESTROY for UDP sockets. Also from David Ahern. 10) Congestion control in RXRPC, from David Howells. 11) Support geneve RX offload in ixgbe, from Emil Tantilov. 12) When hitting pressure for new incoming TCP data SKBs, perform a partial rathern than a full purge of the OFO queue (which could be huge). From Eric Dumazet. 13) Convert XFRM state and policy lookups to RCU, from Florian Westphal. 14) Support RX network flow classification to igb, from Gangfeng Huang. 15) Hardware offloading of eBPF in nfp driver, from Jakub Kicinski. 16) New skbmod packet action, from Jamal Hadi Salim. 17) Remove some inefficiencies in snmp proc output, from Jia He. 18) Add FIB notifications to properly propagate route changes to hardware which is doing forwarding offloading. From Jiri Pirko. 19) New dsa driver for qca8xxx chips, from John Crispin. 20) Implement RFC7559 ipv6 router solicitation backoff, from Maciej Żenczykowski. 21) Add L3 mode to ipvlan, from Mahesh Bandewar. 22) Support 802.1ad in mlx4, from Moshe Shemesh. 23) Support hardware LRO in mediatek driver, from Nelson Chang. 24) Add TC offloading to mlx5, from Or Gerlitz. 25) Convert various drivers to ethtool ksettings interfaces, from Philippe Reynes. 26) TX max rate limiting for cxgb4, from Rahul Lakkireddy. 27) NAPI support for ath10k, from Rajkumar Manoharan. 28) Support XDP in mlx5, from Rana Shahout and Saeed Mahameed. 29) UDP replicast support in TIPC, from Richard Alpe. 30) Per-queue statistics for qed driver, from Sudarsana Reddy Kalluru. 31) Support BQL in thunderx driver, from Sunil Goutham. 32) TSO support in alx driver, from Tobias Regnery. 33) Add stream parser engine and use it in kcm. 34) Support async DHCP replies in ipconfig module, from Uwe Kleine-König. 35) DSA port fast aging for mv88e6xxx driver, from Vivien Didelot. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1715 commits) mlxsw: switchx2: Fix misuse of hard_header_len mlxsw: spectrum: Fix misuse of hard_header_len net/faraday: Stop NCSI device on shutdown net/ncsi: Introduce ncsi_stop_dev() net/ncsi: Rework the channel monitoring net/ncsi: Allow to extend NCSI request properties net/ncsi: Rework request index allocation net/ncsi: Don't probe on the reserved channel ID (0x1f) net/ncsi: Introduce NCSI_RESERVED_CHANNEL net/ncsi: Avoid unused-value build warning from ia64-linux-gcc net: Add netdev all_adj_list refcnt propagation to fix panic net: phy: Add Edge-rate driver for Microsemi PHYs. vmxnet3: Wake queue from reset work i40e: avoid NULL pointer dereference and recursive errors on early PCI error qed: Add RoCE ll2 & GSI support qed: Add support for memory registeration verbs qed: Add support for QP verbs qed: PD,PKEY and CQ verb support qed: Add support for RoCE hw init qede: Add qedr framework ...
312 lines
7.7 KiB
C
312 lines
7.7 KiB
C
/*
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* include/linux/ktime.h
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*
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* ktime_t - nanosecond-resolution time format.
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*
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* Copyright(C) 2005, Thomas Gleixner <tglx@linutronix.de>
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* Copyright(C) 2005, Red Hat, Inc., Ingo Molnar
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*
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* data type definitions, declarations, prototypes and macros.
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*
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* Started by: Thomas Gleixner and Ingo Molnar
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*
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* Credits:
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*
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* Roman Zippel provided the ideas and primary code snippets of
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* the ktime_t union and further simplifications of the original
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* code.
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*
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* For licencing details see kernel-base/COPYING
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*/
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#ifndef _LINUX_KTIME_H
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#define _LINUX_KTIME_H
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#include <linux/time.h>
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#include <linux/jiffies.h>
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/*
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* ktime_t:
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*
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* A single 64-bit variable is used to store the hrtimers
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* internal representation of time values in scalar nanoseconds. The
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* design plays out best on 64-bit CPUs, where most conversions are
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* NOPs and most arithmetic ktime_t operations are plain arithmetic
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* operations.
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*
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*/
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union ktime {
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s64 tv64;
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};
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typedef union ktime ktime_t; /* Kill this */
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/**
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* ktime_set - Set a ktime_t variable from a seconds/nanoseconds value
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* @secs: seconds to set
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* @nsecs: nanoseconds to set
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*
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* Return: The ktime_t representation of the value.
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*/
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static inline ktime_t ktime_set(const s64 secs, const unsigned long nsecs)
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{
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if (unlikely(secs >= KTIME_SEC_MAX))
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return (ktime_t){ .tv64 = KTIME_MAX };
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return (ktime_t) { .tv64 = secs * NSEC_PER_SEC + (s64)nsecs };
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}
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/* Subtract two ktime_t variables. rem = lhs -rhs: */
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#define ktime_sub(lhs, rhs) \
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({ (ktime_t){ .tv64 = (lhs).tv64 - (rhs).tv64 }; })
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/* Add two ktime_t variables. res = lhs + rhs: */
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#define ktime_add(lhs, rhs) \
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({ (ktime_t){ .tv64 = (lhs).tv64 + (rhs).tv64 }; })
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/*
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* Same as ktime_add(), but avoids undefined behaviour on overflow; however,
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* this means that you must check the result for overflow yourself.
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*/
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#define ktime_add_unsafe(lhs, rhs) \
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({ (ktime_t){ .tv64 = (u64) (lhs).tv64 + (rhs).tv64 }; })
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/*
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* Add a ktime_t variable and a scalar nanosecond value.
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* res = kt + nsval:
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*/
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#define ktime_add_ns(kt, nsval) \
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({ (ktime_t){ .tv64 = (kt).tv64 + (nsval) }; })
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/*
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* Subtract a scalar nanosecod from a ktime_t variable
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* res = kt - nsval:
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*/
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#define ktime_sub_ns(kt, nsval) \
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({ (ktime_t){ .tv64 = (kt).tv64 - (nsval) }; })
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/* convert a timespec to ktime_t format: */
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static inline ktime_t timespec_to_ktime(struct timespec ts)
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{
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return ktime_set(ts.tv_sec, ts.tv_nsec);
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}
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/* convert a timespec64 to ktime_t format: */
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static inline ktime_t timespec64_to_ktime(struct timespec64 ts)
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{
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return ktime_set(ts.tv_sec, ts.tv_nsec);
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}
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/* convert a timeval to ktime_t format: */
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static inline ktime_t timeval_to_ktime(struct timeval tv)
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{
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return ktime_set(tv.tv_sec, tv.tv_usec * NSEC_PER_USEC);
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}
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/* Map the ktime_t to timespec conversion to ns_to_timespec function */
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#define ktime_to_timespec(kt) ns_to_timespec((kt).tv64)
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/* Map the ktime_t to timespec conversion to ns_to_timespec function */
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#define ktime_to_timespec64(kt) ns_to_timespec64((kt).tv64)
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/* Map the ktime_t to timeval conversion to ns_to_timeval function */
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#define ktime_to_timeval(kt) ns_to_timeval((kt).tv64)
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/* Convert ktime_t to nanoseconds - NOP in the scalar storage format: */
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#define ktime_to_ns(kt) ((kt).tv64)
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/**
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* ktime_equal - Compares two ktime_t variables to see if they are equal
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* @cmp1: comparable1
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* @cmp2: comparable2
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*
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* Compare two ktime_t variables.
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*
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* Return: 1 if equal.
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*/
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static inline int ktime_equal(const ktime_t cmp1, const ktime_t cmp2)
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{
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return cmp1.tv64 == cmp2.tv64;
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}
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/**
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* ktime_compare - Compares two ktime_t variables for less, greater or equal
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* @cmp1: comparable1
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* @cmp2: comparable2
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*
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* Return: ...
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* cmp1 < cmp2: return <0
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* cmp1 == cmp2: return 0
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* cmp1 > cmp2: return >0
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*/
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static inline int ktime_compare(const ktime_t cmp1, const ktime_t cmp2)
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{
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if (cmp1.tv64 < cmp2.tv64)
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return -1;
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if (cmp1.tv64 > cmp2.tv64)
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return 1;
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return 0;
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}
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/**
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* ktime_after - Compare if a ktime_t value is bigger than another one.
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* @cmp1: comparable1
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* @cmp2: comparable2
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*
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* Return: true if cmp1 happened after cmp2.
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*/
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static inline bool ktime_after(const ktime_t cmp1, const ktime_t cmp2)
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{
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return ktime_compare(cmp1, cmp2) > 0;
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}
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/**
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* ktime_before - Compare if a ktime_t value is smaller than another one.
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* @cmp1: comparable1
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* @cmp2: comparable2
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*
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* Return: true if cmp1 happened before cmp2.
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*/
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static inline bool ktime_before(const ktime_t cmp1, const ktime_t cmp2)
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{
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return ktime_compare(cmp1, cmp2) < 0;
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}
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#if BITS_PER_LONG < 64
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extern s64 __ktime_divns(const ktime_t kt, s64 div);
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static inline s64 ktime_divns(const ktime_t kt, s64 div)
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{
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/*
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* Negative divisors could cause an inf loop,
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* so bug out here.
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*/
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BUG_ON(div < 0);
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if (__builtin_constant_p(div) && !(div >> 32)) {
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s64 ns = kt.tv64;
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u64 tmp = ns < 0 ? -ns : ns;
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do_div(tmp, div);
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return ns < 0 ? -tmp : tmp;
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} else {
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return __ktime_divns(kt, div);
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}
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}
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#else /* BITS_PER_LONG < 64 */
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static inline s64 ktime_divns(const ktime_t kt, s64 div)
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{
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/*
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* 32-bit implementation cannot handle negative divisors,
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* so catch them on 64bit as well.
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*/
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WARN_ON(div < 0);
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return kt.tv64 / div;
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}
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#endif
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static inline s64 ktime_to_us(const ktime_t kt)
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{
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return ktime_divns(kt, NSEC_PER_USEC);
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}
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static inline s64 ktime_to_ms(const ktime_t kt)
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{
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return ktime_divns(kt, NSEC_PER_MSEC);
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}
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static inline s64 ktime_us_delta(const ktime_t later, const ktime_t earlier)
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{
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return ktime_to_us(ktime_sub(later, earlier));
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}
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static inline s64 ktime_ms_delta(const ktime_t later, const ktime_t earlier)
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{
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return ktime_to_ms(ktime_sub(later, earlier));
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}
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static inline ktime_t ktime_add_us(const ktime_t kt, const u64 usec)
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{
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return ktime_add_ns(kt, usec * NSEC_PER_USEC);
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}
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static inline ktime_t ktime_add_ms(const ktime_t kt, const u64 msec)
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{
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return ktime_add_ns(kt, msec * NSEC_PER_MSEC);
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}
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static inline ktime_t ktime_sub_us(const ktime_t kt, const u64 usec)
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{
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return ktime_sub_ns(kt, usec * NSEC_PER_USEC);
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}
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static inline ktime_t ktime_sub_ms(const ktime_t kt, const u64 msec)
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{
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return ktime_sub_ns(kt, msec * NSEC_PER_MSEC);
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}
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extern ktime_t ktime_add_safe(const ktime_t lhs, const ktime_t rhs);
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/**
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* ktime_to_timespec_cond - convert a ktime_t variable to timespec
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* format only if the variable contains data
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* @kt: the ktime_t variable to convert
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* @ts: the timespec variable to store the result in
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*
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* Return: %true if there was a successful conversion, %false if kt was 0.
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*/
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static inline __must_check bool ktime_to_timespec_cond(const ktime_t kt,
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struct timespec *ts)
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{
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if (kt.tv64) {
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*ts = ktime_to_timespec(kt);
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return true;
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} else {
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return false;
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}
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}
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/**
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* ktime_to_timespec64_cond - convert a ktime_t variable to timespec64
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* format only if the variable contains data
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* @kt: the ktime_t variable to convert
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* @ts: the timespec variable to store the result in
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*
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* Return: %true if there was a successful conversion, %false if kt was 0.
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*/
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static inline __must_check bool ktime_to_timespec64_cond(const ktime_t kt,
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struct timespec64 *ts)
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{
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if (kt.tv64) {
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*ts = ktime_to_timespec64(kt);
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return true;
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} else {
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return false;
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}
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}
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/*
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* The resolution of the clocks. The resolution value is returned in
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* the clock_getres() system call to give application programmers an
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* idea of the (in)accuracy of timers. Timer values are rounded up to
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* this resolution values.
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*/
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#define LOW_RES_NSEC TICK_NSEC
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#define KTIME_LOW_RES (ktime_t){ .tv64 = LOW_RES_NSEC }
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static inline ktime_t ns_to_ktime(u64 ns)
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{
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static const ktime_t ktime_zero = { .tv64 = 0 };
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return ktime_add_ns(ktime_zero, ns);
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}
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static inline ktime_t ms_to_ktime(u64 ms)
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{
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static const ktime_t ktime_zero = { .tv64 = 0 };
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return ktime_add_ms(ktime_zero, ms);
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}
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# include <linux/timekeeping.h>
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#endif
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