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[PATCH OLK-5.10] smart_grid: make sure hot zone have the highest priority
by Yipeng Zou 03 Jan '24

03 Jan '24

hulk inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I8TBJJ CVE: NA -------------------------------- The cpufreq policy may be shared between hot and warm zone. In the case for this, we have two sd_level which all belongs to one cpufreq policy. 1. sd_level 0, cpu list 124-127 2. sd_level 1, cpu list 96-127 So in the old code, 96-127 policy will be set to warm zone governor. But it should be hot zone governor, because We need to make sure hot zone have the highest priority. Fixes: 6a00891859d8 ("smart_grid: cpufreq: introduce smart_grid cpufreq control") Signed-off-by: Yipeng Zou <zouyipeng(a)huawei.com> --- drivers/cpufreq/cpufreq.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index 574c9584923f..62b6ca5e7356 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -2821,7 +2821,11 @@ static void smart_grid_work_handler(struct work_struct *work) return; } - for (gov_index = 0; gov_index < SMART_GRID_ZONE_NR; gov_index++) { + /* + * Because of the policy may be shared between hot and warm zone. + * We need to make sure hot zone have the highest priority. + */ + for (gov_index = SMART_GRID_ZONE_NR - 1; gov_index >= 0; gov_index--) { target_gov = cpufreq_parse_governor(sg_zone.governor_name[gov_index]); if (target_gov == NULL) continue; -- 2.34.1

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[PATCH OLK-6.6 v2 0/8] Add NUMA-awareness to qspinlock
by Wei Li 03 Jan '24

03 Jan '24

Backport compact NUMA-aware lock feature v15 from linux maillist. bugzilla: https://gitee.com/openeuler/kernel/issues/I8T8XV Reference: https://lore.kernel.org/linux-arm-kernel/20210514200743.3026725-1-alex.koga… Alex Kogan (6): locking/qspinlock: Rename mcs lock/unlock macros and make them more generic locking/qspinlock: Refactor the qspinlock slow path locking/qspinlock: Introduce CNA into the slow path of qspinlock locking/qspinlock: Introduce starvation avoidance into CNA locking/qspinlock: Avoid moving certain threads between waiting queues in CNA locking/qspinlock: Introduce the shuffle reduction optimization into CNA Wei Li (2): locking/qspinlock: Disable CNA by default config: Enable CONFIG_NUMA_AWARE_SPINLOCKS on x86 .../admin-guide/kernel-parameters.txt | 18 + arch/arm/include/asm/mcs_spinlock.h | 6 +- arch/x86/Kconfig | 20 + arch/x86/configs/openeuler_defconfig | 1 + arch/x86/include/asm/qspinlock.h | 4 + arch/x86/kernel/alternative.c | 4 + include/asm-generic/mcs_spinlock.h | 4 +- kernel/locking/mcs_spinlock.h | 20 +- kernel/locking/qspinlock.c | 82 +++- kernel/locking/qspinlock_cna.h | 425 ++++++++++++++++++ kernel/locking/qspinlock_paravirt.h | 2 +- 11 files changed, 563 insertions(+), 23 deletions(-) create mode 100644 kernel/locking/qspinlock_cna.h -- 2.25.1

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[PATCH OLK-6.6 0/1] Fix ppc32 build error
by GUO Zihua 03 Jan '24

03 Jan '24

This patch fixes PPC32 build error GUO Zihua (1): powerpc: Fix ppc32 build arch/powerpc/kernel/prom.c | 4 ++++ 1 file changed, 4 insertions(+) -- 2.34.1

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[PATCH OLK-6.6 00/57] backport mainline md patch
by Li Nan 03 Jan '24

03 Jan '24

Alex Lyakas (1): md: Whenassemble the array, consult the superblock of the freshest device David Jeffery (1): md/raid6: use valid sector values to determine if an I/O should wait on the reshape Denis Plotnikov (1): md-cluster: check for timeout while a new disk adding Gou Hao (1): md/raid1: remove unnecessary null checking Junxiao Bi (2): md: bypass block throttle for superblock update Revert "md/raid5: Wait for MD_SB_CHANGE_PENDING in raid5d" Justin Stitt (1): md: replace deprecated strncpy with memcpy Li Nan (2): md: factor out a helper exceed_read_errors() to check read_errors md/raid1: support read error check Mariusz Tkaczyk (1): md: do not require mddev_lock() for all options in array_state_store() Song Liu (1): md: fix bi_status reporting in md_end_clone_io Yu Kuai (46): md: use separate work_struct for md_start_sync() md: factor out a helper to choose sync action from md_check_recovery() md: delay choosing sync action to md_start_sync() md: factor out a helper rdev_removeable() from remove_and_add_spares() md: factor out a helper rdev_is_spare() from remove_and_add_spares() md: factor out a helper rdev_addable() from remove_and_add_spares() md: delay remove_and_add_spares() for read only array to md_start_sync() md: initialize 'active_io' while allocating mddev md: initialize 'writes_pending' while allocating mddev md-bitmap: remove the checking of 'pers->quiesce' from location_store() md-bitmap: suspend array earlier in location_store() md: don't check 'mddev->pers' from suspend_hi_store() md: don't check 'mddev->pers' and 'pers->quiesce' from suspend_lo_store() md: factor out a helper from mddev_put() md: simplify md_seq_ops md/raid1: don't split discard io for write behind md: use READ_ONCE/WRITE_ONCE for 'suspend_lo' and 'suspend_hi' md/raid5-cache: use READ_ONCE/WRITE_ONCE for 'conf->log' md: replace is_md_suspended() with 'mddev->suspended' in md_check_recovery() md: add new helpers to suspend/resume array md: add new helpers to suspend/resume and lock/unlock array md/dm-raid: use new apis to suspend array md/md-bitmap: use new apis to suspend array for location_store() md/raid5-cache: use new apis to suspend array md/raid5: use new apis to suspend array md: use new apis to suspend array for sysfs apis md: use new apis to suspend array for adding/removing rdev from state_store() md: use new apis to suspend array for ioctls involed array reconfiguration md: use new apis to suspend array before mddev_create/destroy_serial_pool md: cleanup mddev_create/destroy_serial_pool() md/md-linear: cleanup linear_add() md/raid5: replace suspend with quiesce() callback md: suspend array in md_start_sync() if array need reconfiguration md: remove old apis to suspend the array md: rename __mddev_suspend/resume() back to mddev_suspend/resume() md: cleanup pers->prepare_suspend() md: remove flag RemoveSynchronized md/raid10: remove rcu protection to access rdev from conf md/raid1: remove rcu protection to access rdev from conf md/raid5: remove rcu protection to access rdev from conf md/md-multipath: remove rcu protection to access rdev from conf md: synchronize flush io with array reconfiguration md: fix missing flush of sync_work md: don't leave 'MD_RECOVERY_FROZEN' in error path of md_set_readonly() md: fix stopping sync thread md: split MD_RECOVERY_NEEDED out of mddev_resume drivers/md/md.h | 75 +-- drivers/md/raid5.h | 4 +- drivers/md/dm-raid.c | 17 +- drivers/md/md-autodetect.c | 4 +- drivers/md/md-bitmap.c | 61 +- drivers/md/md-cluster.c | 15 +- drivers/md/md-linear.c | 2 - drivers/md/md-multipath.c | 32 +- drivers/md/md.c | 1081 ++++++++++++++++++++---------------- drivers/md/raid1-10.c | 54 ++ drivers/md/raid1.c | 97 ++-- drivers/md/raid10.c | 274 ++------- drivers/md/raid5-cache.c | 75 ++- drivers/md/raid5-ppl.c | 16 +- drivers/md/raid5.c | 310 +++-------- 15 files changed, 986 insertions(+), 1131 deletions(-) -- 2.39.2

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[PATCH OLK-6.6 0/1] arm64: Add non nmi ipi backtrace support
by Liao Chen 03 Jan '24

03 Jan '24

From: linruizhe <linruizhe(a)huawei.com> Dependencies: CONFIG_DETECT_HUNG_TASK=y CONFIG_WATCHDOG=y Li Zhengyu (1): arm64: Add non nmi ipi backtrace support arch/arm64/kernel/ipi_nmi.c | 33 ++++++++++++++++++++++++++++++--- 1 file changed, 30 insertions(+), 3 deletions(-) -- 2.25.1

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[PATCH OLK-6.6 v3 0/3] arm64: Fix compilation error with ILP32
by Jinjie Ruan 03 Jan '24

03 Jan '24

This patch fix a few compilation errors with ILP32 support using openeuler_defcofig. Changes in v3: - Revert the problem patch instead of update elf.h. Jinjie Ruan (3): Revert "Kconfig: regularize selection of CONFIG_BINFMT_ELF" arm64: Fix compilation error with ILP32 support config: Disable CONFIG_COMPAT_BINFMT_ELF as default arch/arm64/Kconfig | 2 +- arch/arm64/configs/openeuler_defconfig | 1 - arch/arm64/include/asm/seccomp.h | 4 ++-- arch/mips/Kconfig | 2 ++ arch/parisc/Kconfig | 1 + arch/powerpc/Kconfig | 1 + arch/s390/Kconfig | 1 + arch/sparc/Kconfig | 1 + arch/x86/Kconfig | 1 + fs/Kconfig.binfmt | 2 +- 10 files changed, 11 insertions(+), 5 deletions(-) -- 2.34.1

2 4

[PATCH OLK-5.10 0/4] add nokaslr memory region support
by felix 03 Jan '24

03 Jan '24

From: Felix Fu <fuzhen5(a)huawei.com> felix (4): kaslr: add nokaslr memory region Kconfig support efi/libstub: add arm64 nokaslr memory regions x86/boot: add x86 nokaslr memory regions kaslr: enable CONFIG_NOKASLR_MEM_RANGE in openeuler_defconfig arch/arm64/configs/openeuler_defconfig | 1 + arch/x86/boot/compressed/kaslr.c | 44 +++++++ arch/x86/configs/openeuler_defconfig | 1 + drivers/firmware/efi/libstub/arm64-stub.c | 118 ++++++++++++++++++ .../firmware/efi/libstub/efi-stub-helper.c | 7 +- drivers/firmware/efi/libstub/efistub.h | 10 ++ drivers/firmware/efi/libstub/randomalloc.c | 17 +++ init/Kconfig | 7 ++ 8 files changed, 204 insertions(+), 1 deletion(-) -- 2.34.1

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[PATCH v3 OLK-6.6 0/8] Introduce qos smt expeller for co-location
by Xia Fukun 03 Jan '24

03 Jan '24

We introduce the qos smt expeller, which lets online tasks to expel offline tasks on the smt sibling cpus, and exclusively occupy CPU resources.In this way we are able to improve QOS of online tasks in co-location. Guan Jing (8): sched: Introduce qos smt expeller for co-location sched: Implement the function of qos smt expeller sched: Add statistics for qos smt expeller sched: Add tracepoint for qos smt expeller config: Enable CONFIG_QOS_SCHED_SMT_EXPELLER sched/fair: Start tracking qos_offline tasks count in cfs_rq sched/fair: Introduce QOS_SMT_EXPELL priority reversion mechanism sched/fair: Add cmdline nosmtexpell arch/arm64/configs/openeuler_defconfig | 1 + arch/x86/configs/openeuler_defconfig | 1 + include/linux/sched.h | 12 + include/trace/events/sched.h | 55 ++++ init/Kconfig | 9 + kernel/sched/debug.c | 5 + kernel/sched/fair.c | 344 +++++++++++++++++++++++-- kernel/sched/sched.h | 27 ++ 8 files changed, 439 insertions(+), 15 deletions(-) -- 2.34.1

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[PATCH OLK-6.6] drm/radeon: check the alloc_workqueue return value in radeon_crtc_init()
by Yang Yingliang 03 Jan '24

03 Jan '24

mainline inclusion from mainline-v6.8-rc1 commit 7a2464fac80d42f6f8819fed97a553e9c2f43310 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I8T5EB CVE: CVE-2019-16230 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… -------------------------------- check the alloc_workqueue return value in radeon_crtc_init() to avoid null-ptr-deref. Fixes: fa7f517cb26e ("drm/radeon: rework page flip handling v4") Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> Signed-off-by: Alex Deucher <alexander.deucher(a)amd.com> --- drivers/gpu/drm/radeon/radeon_display.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/radeon/radeon_display.c b/drivers/gpu/drm/radeon/radeon_display.c index 901e75ec70ff..efd18c8d84c8 100644 --- a/drivers/gpu/drm/radeon/radeon_display.c +++ b/drivers/gpu/drm/radeon/radeon_display.c @@ -687,11 +687,16 @@ static void radeon_crtc_init(struct drm_device *dev, int index) if (radeon_crtc == NULL) return; + radeon_crtc->flip_queue = alloc_workqueue("radeon-crtc", WQ_HIGHPRI, 0); + if (!radeon_crtc->flip_queue) { + kfree(radeon_crtc); + return; + } + drm_crtc_init(dev, &radeon_crtc->base, &radeon_crtc_funcs); drm_mode_crtc_set_gamma_size(&radeon_crtc->base, 256); radeon_crtc->crtc_id = index; - radeon_crtc->flip_queue = alloc_workqueue("radeon-crtc", WQ_HIGHPRI, 0); rdev->mode_info.crtcs[index] = radeon_crtc; if (rdev->family >= CHIP_BONAIRE) { -- 2.25.1

2 1

[PATCH OLK-6.6 v5] tcp_comp: implement tcp compression
by Lu Wei 03 Jan '24

03 Jan '24

hulk inclusion category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I8T5DG CVE: NA ------------------------------------------------- Signed-off-by: Wang Yufen <wangyufen(a)huawei.com> Signed-off-by: Wei Yongjun <weiyongjun1(a)huawei.com> Signed-off-by: Lu Wei <luwei32(a)huawei.com> --- arch/arm64/configs/openeuler_defconfig | 1 + arch/x86/configs/openeuler_defconfig | 1 + include/linux/tcp.h | 8 +- include/net/inet_sock.h | 3 + include/net/sock.h | 1 + include/net/tcp.h | 40 ++ net/ipv4/Kconfig | 10 + net/ipv4/Makefile | 1 + net/ipv4/syncookies.c | 4 + net/ipv4/sysctl_net_ipv4.c | 42 ++ net/ipv4/tcp.c | 5 + net/ipv4/tcp_comp.c | 912 +++++++++++++++++++++++++ net/ipv4/tcp_input.c | 26 + net/ipv4/tcp_ipv4.c | 2 + net/ipv4/tcp_minisocks.c | 3 + net/ipv4/tcp_output.c | 52 ++ net/ipv6/syncookies.c | 4 + 17 files changed, 1114 insertions(+), 1 deletion(-) create mode 100644 net/ipv4/tcp_comp.c diff --git a/arch/arm64/configs/openeuler_defconfig b/arch/arm64/configs/openeuler_defconfig index 33ba39711884..abc33d2c29a6 100644 --- a/arch/arm64/configs/openeuler_defconfig +++ b/arch/arm64/configs/openeuler_defconfig @@ -1222,6 +1222,7 @@ CONFIG_DEFAULT_CUBIC=y # CONFIG_DEFAULT_RENO is not set CONFIG_DEFAULT_TCP_CONG="cubic" CONFIG_TCP_MD5SIG=y +CONFIG_TCP_COMP=y CONFIG_IPV6=y CONFIG_IPV6_ROUTER_PREF=y CONFIG_IPV6_ROUTE_INFO=y diff --git a/arch/x86/configs/openeuler_defconfig b/arch/x86/configs/openeuler_defconfig index 44040b835333..177a6fdcce58 100644 --- a/arch/x86/configs/openeuler_defconfig +++ b/arch/x86/configs/openeuler_defconfig @@ -1244,6 +1244,7 @@ CONFIG_DEFAULT_CUBIC=y # CONFIG_DEFAULT_RENO is not set CONFIG_DEFAULT_TCP_CONG="cubic" CONFIG_TCP_MD5SIG=y +CONFIG_TCP_COMP=y CONFIG_IPV6=y CONFIG_IPV6_ROUTER_PREF=y CONFIG_IPV6_ROUTE_INFO=y diff --git a/include/linux/tcp.h b/include/linux/tcp.h index 3c5efeeb024f..d94a84c291f0 100644 --- a/include/linux/tcp.h +++ b/include/linux/tcp.h @@ -123,7 +123,10 @@ struct tcp_options_received { snd_wscale : 4, /* Window scaling received from sender */ rcv_wscale : 4; /* Window scaling to send to receiver */ u8 saw_unknown:1, /* Received unknown option */ - unused:7; +#if IS_ENABLED(CONFIG_TCP_COMP) + comp_ok:1, /* COMP seen on SYN packet */ +#endif + unused:6; u8 num_sacks; /* Number of SACK blocks */ u16 user_mss; /* mss requested by user in ioctl */ u16 mss_clamp; /* Maximal mss, negotiated at connection setup */ @@ -136,6 +139,9 @@ static inline void tcp_clear_options(struct tcp_options_received *rx_opt) #if IS_ENABLED(CONFIG_SMC) rx_opt->smc_ok = 0; #endif +#if IS_ENABLED(CONFIG_TCP_COMP) + rx_opt->comp_ok = 0; +#endif } /* This is the max number of SACKS that we'll generate and process. It's safe diff --git a/include/net/inet_sock.h b/include/net/inet_sock.h index 2de0e4d4a027..13c1f1e83de5 100644 --- a/include/net/inet_sock.h +++ b/include/net/inet_sock.h @@ -87,6 +87,9 @@ struct inet_request_sock { ecn_ok : 1, acked : 1, no_srccheck: 1, +#if IS_ENABLED(CONFIG_TCP_COMP) + comp_ok : 1, +#endif smc_ok : 1; u32 ir_mark; union { diff --git a/include/net/sock.h b/include/net/sock.h index 7753354d59c0..c86845136ec5 100644 --- a/include/net/sock.h +++ b/include/net/sock.h @@ -959,6 +959,7 @@ enum sock_flags { SOCK_XDP, /* XDP is attached */ SOCK_TSTAMP_NEW, /* Indicates 64 bit timestamps always */ SOCK_RCVMARK, /* Receive SO_MARK ancillary data with packet */ + SOCK_COMP, }; #define SK_FLAGS_TIMESTAMP ((1UL << SOCK_TIMESTAMP) | (1UL << SOCK_TIMESTAMPING_RX_SOFTWARE)) diff --git a/include/net/tcp.h b/include/net/tcp.h index e9d387fffe22..cb33a2c46b2f 100644 --- a/include/net/tcp.h +++ b/include/net/tcp.h @@ -195,6 +195,7 @@ void tcp_time_wait(struct sock *sk, int state, int timeo); */ #define TCPOPT_FASTOPEN_MAGIC 0xF989 #define TCPOPT_SMC_MAGIC 0xE2D4C3D9 +#define TCPOPT_COMP_MAGIC 0x7954 /* * TCP option lengths @@ -208,6 +209,7 @@ void tcp_time_wait(struct sock *sk, int state, int timeo); #define TCPOLEN_FASTOPEN_BASE 2 #define TCPOLEN_EXP_FASTOPEN_BASE 4 #define TCPOLEN_EXP_SMC_BASE 6 +#define TCPOLEN_EXP_COMP_BASE 4 /* But this is what stacks really send out. */ #define TCPOLEN_TSTAMP_ALIGNED 12 @@ -2531,4 +2533,42 @@ static inline u64 tcp_transmit_time(const struct sock *sk) return 0; } +#if IS_ENABLED(CONFIG_TCP_COMP) +extern struct static_key_false tcp_have_comp; + +extern unsigned long *sysctl_tcp_compression_ports; +extern int sysctl_tcp_compression_local; + +bool tcp_syn_comp_enabled(struct sock *sk); +bool tcp_synack_comp_enabled(struct sock *sk, + const struct inet_request_sock *ireq); +void tcp_init_compression(struct sock *sk); +void tcp_cleanup_compression(struct sock *sk); +int tcp_comp_init(void); +#else +static inline bool tcp_syn_comp_enabled(struct tcp_sock *tp) +{ + return false; +} + +static inline bool tcp_synack_comp_enabled(struct sock *sk, + const struct inet_request_sock *ireq) +{ + return false; +} + +static inline void tcp_init_compression(struct sock *sk) +{ +} + +static inline void tcp_cleanup_compression(struct sock *sk) +{ +} + +static inline int tcp_comp_init(void) +{ + return 0; +} +#endif + #endif /* _TCP_H */ diff --git a/net/ipv4/Kconfig b/net/ipv4/Kconfig index 2dfb12230f08..a4405ea38338 100644 --- a/net/ipv4/Kconfig +++ b/net/ipv4/Kconfig @@ -751,3 +751,13 @@ config TCP_MD5SIG on the Internet. If unsure, say N. + +config TCP_COMP + bool "TCP: Transport Layer Compression support" + depends on CRYPTO_ZSTD=y + select STREAM_PARSER + help + Enable kernel payload compression support for TCP protocol. This allows + payload compression handling of the TCP protocol to be done in-kernel. + + If unsure, say Y. diff --git a/net/ipv4/Makefile b/net/ipv4/Makefile index b18ba8ef93ad..aa458d9f534a 100644 --- a/net/ipv4/Makefile +++ b/net/ipv4/Makefile @@ -65,6 +65,7 @@ obj-$(CONFIG_TCP_CONG_ILLINOIS) += tcp_illinois.o obj-$(CONFIG_NET_SOCK_MSG) += tcp_bpf.o obj-$(CONFIG_BPF_SYSCALL) += udp_bpf.o obj-$(CONFIG_NETLABEL) += cipso_ipv4.o +obj-$(CONFIG_TCP_COMP) += tcp_comp.o obj-$(CONFIG_XFRM) += xfrm4_policy.o xfrm4_state.o xfrm4_input.o \ xfrm4_output.o xfrm4_protocol.o diff --git a/net/ipv4/syncookies.c b/net/ipv4/syncookies.c index 3b4dafefb4b0..584b29c154e8 100644 --- a/net/ipv4/syncookies.c +++ b/net/ipv4/syncookies.c @@ -391,6 +391,10 @@ struct sock *cookie_v4_check(struct sock *sk, struct sk_buff *skb) if (IS_ENABLED(CONFIG_SMC)) ireq->smc_ok = 0; +#if IS_ENABLED(CONFIG_TCP_COMP) + ireq->comp_ok = 0; +#endif + ireq->ir_iif = inet_request_bound_dev_if(sk, skb); /* We throwed the options of the initial SYN away, so we hope diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c index b17eb28a9690..f212133b05e9 100644 --- a/net/ipv4/sysctl_net_ipv4.c +++ b/net/ipv4/sysctl_net_ipv4.c @@ -469,6 +469,30 @@ static int proc_fib_multipath_hash_fields(struct ctl_table *table, int write, } #endif +#if IS_ENABLED(CONFIG_TCP_COMP) +static int proc_tcp_compression_ports(struct ctl_table *table, int write, + void __user *buffer, size_t *lenp, + loff_t *ppos) +{ + unsigned long *bitmap = *(unsigned long **)table->data; + unsigned long bitmap_len = table->maxlen; + int ret; + + ret = proc_do_large_bitmap(table, write, buffer, lenp, ppos); + if (write && ret == 0) { + if (bitmap_empty(bitmap, bitmap_len)) { + if (static_key_enabled(&tcp_have_comp)) + static_branch_disable(&tcp_have_comp); + } else { + if (!static_key_enabled(&tcp_have_comp)) + static_branch_enable(&tcp_have_comp); + } + } + + return ret; +} +#endif + static struct ctl_table ipv4_table[] = { { .procname = "tcp_max_orphans", @@ -587,6 +611,24 @@ static struct ctl_table ipv4_table[] = { .mode = 0644, .proc_handler = proc_dointvec, }, +#if IS_ENABLED(CONFIG_TCP_COMP) + { + .procname = "tcp_compression_ports", + .data = &sysctl_tcp_compression_ports, + .maxlen = 65536, + .mode = 0644, + .proc_handler = proc_tcp_compression_ports, + }, + { + .procname = "tcp_compression_local", + .data = &sysctl_tcp_compression_local, + .maxlen = sizeof(int), + .mode = 0644, + .proc_handler = proc_dointvec_minmax, + .extra1 = SYSCTL_ZERO, + .extra2 = SYSCTL_ONE, + }, +#endif { } }; diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index 3d3a24f79573..2703be8a7316 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -302,6 +302,10 @@ DEFINE_STATIC_KEY_FALSE(tcp_have_smc); EXPORT_SYMBOL(tcp_have_smc); #endif +#if IS_ENABLED(CONFIG_TCP_COMP) +DEFINE_STATIC_KEY_FALSE(tcp_have_comp); +#endif + /* * Current number of TCP sockets. */ @@ -4707,5 +4711,6 @@ void __init tcp_init(void) tcp_metrics_init(); BUG_ON(tcp_register_congestion_control(&tcp_reno) != 0); tcp_tasklet_init(); + tcp_comp_init(); mptcp_init(); } diff --git a/net/ipv4/tcp_comp.c b/net/ipv4/tcp_comp.c new file mode 100644 index 000000000000..53157a413b58 --- /dev/null +++ b/net/ipv4/tcp_comp.c @@ -0,0 +1,912 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * TCP compression support + * + * Copyright(c) 2021 Huawei Technologies Co., Ltd + */ + +#include <linux/skmsg.h> +#include <linux/zstd.h> + +#define TCP_COMP_MAX_PADDING 64 +#define TCP_COMP_DATA_SIZE 65536 +#define TCP_COMP_SCRATCH_SIZE (TCP_COMP_DATA_SIZE - 1) +#define TCP_COMP_MAX_CSIZE (TCP_COMP_SCRATCH_SIZE + TCP_COMP_MAX_PADDING) +#define TCP_COMP_ALLOC_ORDER get_order(TCP_COMP_DATA_SIZE) +#define TCP_COMP_MAX_WINDOWLOG 17 +#define TCP_COMP_MAX_INPUT (1 << TCP_COMP_MAX_WINDOWLOG) + +#define TCP_COMP_SEND_PENDING 1 +#define ZSTD_COMP_DEFAULT_LEVEL 1 + +static unsigned long tcp_compression_ports[65536 / 8]; + +unsigned long *sysctl_tcp_compression_ports = tcp_compression_ports; +int sysctl_tcp_compression_local __read_mostly; + +static struct proto tcp_prot_override; + +struct tcp_comp_context_tx { + ZSTD_CStream *cstream; + void *cworkspace; + void *plaintext_data; + void *compressed_data; + struct sk_msg msg; + bool in_tcp_sendpages; +}; + +struct tcp_comp_context_rx { + ZSTD_DStream *dstream; + void *dworkspace; + void *plaintext_data; + + struct strparser strp; + void (*saved_data_ready)(struct sock *sk); + struct sk_buff *pkt; + struct sk_buff *dpkt; +}; + +struct tcp_comp_context { + struct rcu_head rcu; + + struct proto *sk_proto; + void (*sk_write_space)(struct sock *sk); + + struct tcp_comp_context_tx tx; + struct tcp_comp_context_rx rx; + + unsigned long flags; +}; + +static bool tcp_comp_is_write_pending(struct tcp_comp_context *ctx) +{ + return test_bit(TCP_COMP_SEND_PENDING, &ctx->flags); +} + +static void tcp_comp_err_abort(struct sock *sk, int err) +{ + sk->sk_err = err; + sk->sk_error_report(sk); +} + +static bool tcp_comp_enabled(__be32 saddr, __be32 daddr, int port) +{ + if (!sysctl_tcp_compression_local && + (saddr == daddr || ipv4_is_loopback(daddr))) + return false; + + return test_bit(port, sysctl_tcp_compression_ports); +} + +bool tcp_syn_comp_enabled(struct sock *sk) +{ + struct inet_sock *inet = inet_sk(sk); + + return tcp_comp_enabled(inet->inet_saddr, inet->inet_daddr, + ntohs(inet->inet_dport)); +} + +bool tcp_synack_comp_enabled(struct sock *sk, + const struct inet_request_sock *ireq) +{ + struct inet_sock *inet = inet_sk(sk); + + if (!ireq->comp_ok) + return false; + + return tcp_comp_enabled(ireq->ir_loc_addr, ireq->ir_rmt_addr, + ntohs(inet->inet_sport)); +} + +static struct tcp_comp_context *comp_get_ctx(const struct sock *sk) +{ + struct inet_connection_sock *icsk = inet_csk(sk); + + return (__force void *)icsk->icsk_ulp_data; +} + +static int tcp_comp_tx_context_init(struct tcp_comp_context *ctx) +{ + ZSTD_parameters params; + int csize; + + params = ZSTD_getParams(ZSTD_COMP_DEFAULT_LEVEL, PAGE_SIZE, 0); + csize = zstd_cstream_workspace_bound(&params.cParams); + if (csize <= 0) + return -EINVAL; + + ctx->tx.cworkspace = kmalloc(csize, GFP_KERNEL); + if (!ctx->tx.cworkspace) + return -ENOMEM; + + ctx->tx.cstream = zstd_init_cstream(&params, 0, ctx->tx.cworkspace, + csize); + if (!ctx->tx.cstream) + goto err_cstream; + + ctx->tx.plaintext_data = kvmalloc(TCP_COMP_SCRATCH_SIZE, GFP_KERNEL); + if (!ctx->tx.plaintext_data) + goto err_cstream; + + ctx->tx.compressed_data = kvmalloc(TCP_COMP_MAX_CSIZE, GFP_KERNEL); + if (!ctx->tx.compressed_data) + goto err_compressed; + + return 0; + +err_compressed: + kvfree(ctx->tx.plaintext_data); + ctx->tx.plaintext_data = NULL; +err_cstream: + kfree(ctx->tx.cworkspace); + ctx->tx.cworkspace = NULL; + + return -ENOMEM; +} + +static void *tcp_comp_get_tx_stream(struct sock *sk) +{ + struct tcp_comp_context *ctx = comp_get_ctx(sk); + + if (!ctx->tx.plaintext_data) + tcp_comp_tx_context_init(ctx); + + return ctx->tx.plaintext_data; +} + +static int alloc_compressed_msg(struct sock *sk, int len) +{ + struct tcp_comp_context *ctx = comp_get_ctx(sk); + struct sk_msg *msg = &ctx->tx.msg; + + sk_msg_init(msg); + + return sk_msg_alloc(sk, msg, len, 0); +} + +static int memcopy_from_iter(struct sock *sk, struct iov_iter *from, int copy) +{ + void *dest; + int rc; + + dest = tcp_comp_get_tx_stream(sk); + if (!dest) + return -ENOSPC; + + if (sk->sk_route_caps & NETIF_F_NOCACHE_COPY) + rc = copy_from_iter_nocache(dest, copy, from); + else + rc = copy_from_iter(dest, copy, from); + + if (rc != copy) + rc = -EFAULT; + + return rc; +} + +static int memcopy_to_msg(struct sock *sk, int bytes) +{ + struct tcp_comp_context *ctx = comp_get_ctx(sk); + struct sk_msg *msg = &ctx->tx.msg; + int i = msg->sg.curr; + struct scatterlist *sge; + u32 copy, buf_size; + void *from, *to; + + from = ctx->tx.compressed_data; + do { + sge = sk_msg_elem(msg, i); + /* This is possible if a trim operation shrunk the buffer */ + if (msg->sg.copybreak >= sge->length) { + msg->sg.copybreak = 0; + sk_msg_iter_var_next(i); + if (i == msg->sg.end) + break; + sge = sk_msg_elem(msg, i); + } + buf_size = sge->length - msg->sg.copybreak; + copy = (buf_size > bytes) ? bytes : buf_size; + to = sg_virt(sge) + msg->sg.copybreak; + msg->sg.copybreak += copy; + memcpy(to, from, copy); + bytes -= copy; + from += copy; + if (!bytes) + break; + msg->sg.copybreak = 0; + sk_msg_iter_var_next(i); + } while (i != msg->sg.end); + + msg->sg.curr = i; + return bytes; +} + +static int tcp_comp_compress_to_msg(struct sock *sk, int bytes) +{ + struct tcp_comp_context *ctx = comp_get_ctx(sk); + ZSTD_outBuffer outbuf; + ZSTD_inBuffer inbuf; + size_t ret; + + inbuf.src = ctx->tx.plaintext_data; + outbuf.dst = ctx->tx.compressed_data; + inbuf.size = bytes; + outbuf.size = TCP_COMP_MAX_CSIZE; + inbuf.pos = 0; + outbuf.pos = 0; + + ret = ZSTD_compressStream(ctx->tx.cstream, &outbuf, &inbuf); + if (ZSTD_isError(ret)) + return -EIO; + + ret = ZSTD_flushStream(ctx->tx.cstream, &outbuf); + if (ZSTD_isError(ret)) + return -EIO; + + if (inbuf.pos != inbuf.size) + return -EIO; + + if (memcopy_to_msg(sk, outbuf.pos)) + return -EIO; + + sk_msg_trim(sk, &ctx->tx.msg, outbuf.pos); + + return 0; +} + +static int tcp_comp_push_msg(struct sock *sk, struct sk_msg *msg, int flags) +{ + struct tcp_comp_context *ctx = comp_get_ctx(sk); + struct msghdr mh; + struct bio_vec bvec; + struct scatterlist *sg; + int ret, offset; + struct page *p; + size_t size; + + ctx->tx.in_tcp_sendpages = true; + while (1) { + sg = sk_msg_elem(msg, msg->sg.start); + offset = sg->offset; + size = sg->length; + p = sg_page(sg); +retry: + memset(&mh, 0, sizeof(struct msghdr)); + memset(&bvec, 0, sizeof(struct bio_vec)); + + mh.msg_flags = flags | MSG_SPLICE_PAGES; + bvec_set_page(&bvec, p, size, offset); + iov_iter_bvec(&mh.msg_iter, ITER_SOURCE, &bvec, 1, size); + + ret = tcp_sendmsg_locked(sk, &mh, size); + if (ret != size) { + if (ret > 0) { + sk_mem_uncharge(sk, ret); + sg->offset += ret; + sg->length -= ret; + size -= ret; + offset += ret; + goto retry; + } + ctx->tx.in_tcp_sendpages = false; + return ret; + } + + sk_mem_uncharge(sk, ret); + msg->sg.size -= size; + put_page(p); + sk_msg_iter_next(msg, start); + if (msg->sg.start == msg->sg.end) + break; + } + + clear_bit(TCP_COMP_SEND_PENDING, &ctx->flags); + ctx->tx.in_tcp_sendpages = false; + + return 0; +} + +static int tcp_comp_push(struct sock *sk, int bytes, int flags) +{ + struct tcp_comp_context *ctx = comp_get_ctx(sk); + int ret; + + ret = tcp_comp_compress_to_msg(sk, bytes); + if (ret < 0) { + pr_debug("%s: failed to compress sg\n", __func__); + return ret; + } + + set_bit(TCP_COMP_SEND_PENDING, &ctx->flags); + + ret = tcp_comp_push_msg(sk, &ctx->tx.msg, flags); + if (ret) { + pr_debug("%s: failed to tcp_comp_push_sg\n", __func__); + return ret; + } + + return 0; +} + +static int wait_on_pending_writer(struct sock *sk, long *timeo) +{ + DEFINE_WAIT_FUNC(wait, woken_wake_function); + int ret = 0; + + add_wait_queue(sk_sleep(sk), &wait); + while (1) { + if (!*timeo) { + ret = -EAGAIN; + break; + } + + if (signal_pending(current)) { + ret = sock_intr_errno(*timeo); + break; + } + + if (sk_wait_event(sk, timeo, !sk->sk_write_pending, &wait)) + break; + } + remove_wait_queue(sk_sleep(sk), &wait); + + return ret; +} + +static int tcp_comp_push_pending_msg(struct sock *sk, int flags) +{ + struct tcp_comp_context *ctx = comp_get_ctx(sk); + struct sk_msg *msg = &ctx->tx.msg; + + if (msg->sg.start == msg->sg.end) + return 0; + + return tcp_comp_push_msg(sk, msg, flags); +} + +static int tcp_comp_complete_pending_work(struct sock *sk, int flags, + long *timeo) +{ + struct tcp_comp_context *ctx = comp_get_ctx(sk); + int ret = 0; + + if (unlikely(sk->sk_write_pending)) + ret = wait_on_pending_writer(sk, timeo); + + if (!ret && tcp_comp_is_write_pending(ctx)) + ret = tcp_comp_push_pending_msg(sk, flags); + + return ret; +} + +static int tcp_comp_sendmsg(struct sock *sk, struct msghdr *msg, size_t size) +{ + struct tcp_comp_context *ctx = comp_get_ctx(sk); + int copied = 0, err = 0; + size_t try_to_copy; + int required_size; + long timeo; + + lock_sock(sk); + + timeo = sock_sndtimeo(sk, msg->msg_flags & MSG_DONTWAIT); + + err = tcp_comp_complete_pending_work(sk, msg->msg_flags, &timeo); + if (err) + goto out_err; + + while (msg_data_left(msg)) { + if (sk->sk_err) { + err = -sk->sk_err; + goto out_err; + } + + try_to_copy = msg_data_left(msg); + if (try_to_copy > TCP_COMP_SCRATCH_SIZE) + try_to_copy = TCP_COMP_SCRATCH_SIZE; + required_size = try_to_copy + TCP_COMP_MAX_PADDING; + + if (!sk_stream_memory_free(sk)) + goto wait_for_sndbuf; + +alloc_compressed: + err = alloc_compressed_msg(sk, required_size); + if (err) { + if (err != -ENOSPC) + goto wait_for_memory; + goto out_err; + } + + err = memcopy_from_iter(sk, &msg->msg_iter, try_to_copy); + if (err < 0) + goto out_err; + + copied += try_to_copy; + + err = tcp_comp_push(sk, try_to_copy, msg->msg_flags); + if (err < 0) { + if (err == -ENOMEM) + goto wait_for_memory; + if (err != -EAGAIN) + tcp_comp_err_abort(sk, EBADMSG); + goto out_err; + } + + continue; +wait_for_sndbuf: + set_bit(SOCK_NOSPACE, &sk->sk_socket->flags); +wait_for_memory: + err = sk_stream_wait_memory(sk, &timeo); + if (err) + goto out_err; + if (ctx->tx.msg.sg.size < required_size) + goto alloc_compressed; + } + +out_err: + err = sk_stream_error(sk, msg->msg_flags, err); + + release_sock(sk); + + return copied ? copied : err; +} + +static struct sk_buff *comp_wait_data(struct sock *sk, int flags, + long timeo, int *err) +{ + struct tcp_comp_context *ctx = comp_get_ctx(sk); + struct sk_buff *skb; + DEFINE_WAIT_FUNC(wait, woken_wake_function); + + while (!(skb = ctx->rx.pkt)) { + if (sk->sk_err) { + *err = sock_error(sk); + return NULL; + } + + if (!skb_queue_empty(&sk->sk_receive_queue)) { + __strp_unpause(&ctx->rx.strp); + if (ctx->rx.pkt) + return ctx->rx.pkt; + } + + if (sk->sk_shutdown & RCV_SHUTDOWN) + return NULL; + + if (sock_flag(sk, SOCK_DONE)) + return NULL; + + if ((flags & MSG_DONTWAIT) || !timeo) { + *err = -EAGAIN; + return NULL; + } + + add_wait_queue(sk_sleep(sk), &wait); + sk_set_bit(SOCKWQ_ASYNC_WAITDATA, sk); + sk_wait_event(sk, &timeo, ctx->rx.pkt != skb, &wait); + sk_clear_bit(SOCKWQ_ASYNC_WAITDATA, sk); + remove_wait_queue(sk_sleep(sk), &wait); + + /* Handle signals */ + if (signal_pending(current)) { + *err = sock_intr_errno(timeo); + return NULL; + } + } + + return skb; +} + +static bool comp_advance_skb(struct sock *sk, struct sk_buff *skb, + unsigned int len) +{ + struct tcp_comp_context *ctx = comp_get_ctx(sk); + struct strp_msg *rxm = strp_msg(skb); + + if (len < rxm->full_len) { + rxm->offset += len; + rxm->full_len -= len; + return false; + } + + /* Finished with message */ + ctx->rx.pkt = NULL; + kfree_skb(skb); + __strp_unpause(&ctx->rx.strp); + + return true; +} + +static bool comp_advance_dskb(struct sock *sk, struct sk_buff *skb, + unsigned int len) +{ + struct tcp_comp_context *ctx = comp_get_ctx(sk); + struct strp_msg *rxm = strp_msg(skb); + + if (len < rxm->full_len) { + rxm->offset += len; + rxm->full_len -= len; + return false; + } + + /* Finished with message */ + ctx->rx.dpkt = NULL; + kfree_skb(skb); + return true; +} + +static int tcp_comp_rx_context_init(struct tcp_comp_context *ctx) +{ + int dsize; + + dsize = zstd_dstream_workspace_bound(TCP_COMP_MAX_INPUT); + if (dsize <= 0) + return -EINVAL; + + ctx->rx.dworkspace = kmalloc(dsize, GFP_KERNEL); + if (!ctx->rx.dworkspace) + return -ENOMEM; + + ctx->rx.dstream = zstd_init_dstream(TCP_COMP_MAX_INPUT, + ctx->rx.dworkspace, dsize); + if (!ctx->rx.dstream) + goto err_dstream; + + ctx->rx.plaintext_data = kvmalloc(TCP_COMP_MAX_CSIZE * 32, GFP_KERNEL); + if (!ctx->rx.plaintext_data) + goto err_dstream; + + return 0; + +err_dstream: + kfree(ctx->rx.dworkspace); + ctx->rx.dworkspace = NULL; + + return -ENOMEM; +} + +static void *tcp_comp_get_rx_stream(struct sock *sk) +{ + struct tcp_comp_context *ctx = comp_get_ctx(sk); + + if (!ctx->rx.plaintext_data) + tcp_comp_rx_context_init(ctx); + + return ctx->rx.plaintext_data; +} + +static int tcp_comp_decompress(struct sock *sk, struct sk_buff *skb, int flags) +{ + struct tcp_comp_context *ctx = comp_get_ctx(sk); + struct strp_msg *rxm = strp_msg(skb); + size_t ret, compressed_len = 0; + int nr_frags_over = 0; + ZSTD_outBuffer outbuf; + ZSTD_inBuffer inbuf; + struct sk_buff *nskb; + int len, plen; + void *to; + + to = tcp_comp_get_rx_stream(sk); + if (!to) + return -ENOSPC; + + if (skb_linearize_cow(skb)) + return -ENOMEM; + + nskb = skb_copy(skb, GFP_KERNEL); + if (!nskb) + return -ENOMEM; + + while (compressed_len < (skb->len - rxm->offset)) { + if (skb_shinfo(nskb)->nr_frags >= MAX_SKB_FRAGS) + break; + + len = 0; + plen = skb->len - rxm->offset - compressed_len; + if (plen > TCP_COMP_MAX_CSIZE) + plen = TCP_COMP_MAX_CSIZE; + + inbuf.src = (char *)skb->data + rxm->offset + compressed_len; + inbuf.pos = 0; + inbuf.size = plen; + + outbuf.dst = ctx->rx.plaintext_data; + outbuf.pos = 0; + outbuf.size = MAX_SKB_FRAGS * TCP_COMP_DATA_SIZE; + outbuf.size -= skb_shinfo(nskb)->nr_frags * TCP_COMP_DATA_SIZE; + + ret = ZSTD_decompressStream(ctx->rx.dstream, &outbuf, &inbuf); + if (ZSTD_isError(ret)) { + kfree_skb(nskb); + return -EIO; + } + + if (!compressed_len) { + len = outbuf.pos - skb->len; + if (len > skb_tailroom(nskb)) + len = skb_tailroom(nskb); + + __skb_put(nskb, len); + + len += skb->len; + skb_copy_to_linear_data(nskb, to, len); + } + + while ((to += len, outbuf.pos -= len) > 0) { + struct page *pages; + skb_frag_t *frag; + + if (skb_shinfo(nskb)->nr_frags >= MAX_SKB_FRAGS) { + nr_frags_over = 1; + break; + } + + frag = skb_shinfo(nskb)->frags + + skb_shinfo(nskb)->nr_frags; + pages = alloc_pages(__GFP_NOWARN | GFP_KERNEL | __GFP_COMP, + TCP_COMP_ALLOC_ORDER); + if (!pages) { + kfree_skb(nskb); + return -ENOMEM; + } + + frag->bv_page = pages; + len = PAGE_SIZE << TCP_COMP_ALLOC_ORDER; + if (outbuf.pos < len) + len = outbuf.pos; + + frag->bv_offset = 0; + skb_frag_size_set(frag, len); + memcpy(skb_frag_address(frag), to, len); + + nskb->truesize += len; + nskb->data_len += len; + nskb->len += len; + skb_shinfo(nskb)->nr_frags++; + } + + if (nr_frags_over) + break; + + compressed_len += inbuf.pos; + } + + ctx->rx.dpkt = nskb; + rxm = strp_msg(nskb); + rxm->full_len = nskb->len; + rxm->offset = 0; + comp_advance_skb(sk, skb, compressed_len); + + return 0; +} + +static int tcp_comp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, + int flags, int *addr_len) +{ + struct tcp_comp_context *ctx = comp_get_ctx(sk); + struct strp_msg *rxm; + struct sk_buff *skb; + ssize_t copied = 0; + int target, err = 0; + long timeo; + + if (unlikely(flags & MSG_ERRQUEUE)) + return sock_recv_errqueue(sk, msg, len, SOL_IP, IP_RECVERR); + + lock_sock(sk); + + target = sock_rcvlowat(sk, flags & MSG_WAITALL, len); + timeo = sock_rcvtimeo(sk, flags & MSG_WAITALL); + + do { + int chunk = 0; + + if (!ctx->rx.dpkt) { + skb = comp_wait_data(sk, flags, timeo, &err); + if (!skb) + goto recv_end; + + err = tcp_comp_decompress(sk, skb, flags); + if (err < 0) { + goto recv_end; + } + } + + skb = ctx->rx.dpkt; + rxm = strp_msg(skb); + chunk = min_t(unsigned int, rxm->full_len, len); + err = skb_copy_datagram_msg(skb, rxm->offset, msg, + chunk); + if (err < 0) + goto recv_end; + + copied += chunk; + len -= chunk; + if (likely(!(flags & MSG_PEEK))) + comp_advance_dskb(sk, skb, chunk); + else + break; + + if (copied >= target && !ctx->rx.dpkt) + break; + } while (len > 0); + +recv_end: + release_sock(sk); + return copied ? : err; +} + +bool comp_stream_read(struct sock *sk) +{ + struct tcp_comp_context *ctx = comp_get_ctx(sk); + + if (!ctx) + return false; + + if (ctx->rx.pkt || ctx->rx.dpkt) + return true; + + return false; +} + +static void comp_data_ready(struct sock *sk) +{ + struct tcp_comp_context *ctx = comp_get_ctx(sk); + + strp_data_ready(&ctx->rx.strp); +} + +static void comp_queue(struct strparser *strp, struct sk_buff *skb) +{ + struct tcp_comp_context *ctx = comp_get_ctx(strp->sk); + + ctx->rx.pkt = skb; + strp_pause(strp); + ctx->rx.saved_data_ready(strp->sk); +} + +static int comp_read_size(struct strparser *strp, struct sk_buff *skb) +{ + struct strp_msg *rxm = strp_msg(skb); + + if (rxm->offset > skb->len) + return 0; + + return skb->len - rxm->offset; +} + +void comp_setup_strp(struct sock *sk, struct tcp_comp_context *ctx) +{ + struct strp_callbacks cb; + + memset(&cb, 0, sizeof(cb)); + cb.rcv_msg = comp_queue; + cb.parse_msg = comp_read_size; + strp_init(&ctx->rx.strp, sk, &cb); + + write_lock_bh(&sk->sk_callback_lock); + ctx->rx.saved_data_ready = sk->sk_data_ready; + sk->sk_data_ready = comp_data_ready; + write_unlock_bh(&sk->sk_callback_lock); + + strp_check_rcv(&ctx->rx.strp); +} + +static void tcp_comp_write_space(struct sock *sk) +{ + struct tcp_comp_context *ctx = comp_get_ctx(sk); + + if (ctx->tx.in_tcp_sendpages) { + ctx->sk_write_space(sk); + return; + } + + if (!sk->sk_write_pending && tcp_comp_is_write_pending(ctx)) { + gfp_t sk_allocation = sk->sk_allocation; + int rc; + + sk->sk_allocation = GFP_ATOMIC; + rc = tcp_comp_push_pending_msg(sk, MSG_DONTWAIT | MSG_NOSIGNAL); + sk->sk_allocation = sk_allocation; + + if (rc < 0) + return; + } + + ctx->sk_write_space(sk); +} + +void tcp_init_compression(struct sock *sk) +{ + struct inet_connection_sock *icsk = inet_csk(sk); + struct tcp_comp_context *ctx = NULL; + struct sk_msg *msg = NULL; + struct tcp_sock *tp = tcp_sk(sk); + + if (!tp->rx_opt.comp_ok) + return; + + ctx = kzalloc(sizeof(*ctx), GFP_ATOMIC); + if (!ctx) + return; + + msg = &ctx->tx.msg; + sk_msg_init(msg); + + ctx->sk_write_space = sk->sk_write_space; + ctx->sk_proto = sk->sk_prot; + WRITE_ONCE(sk->sk_prot, &tcp_prot_override); + sk->sk_write_space = tcp_comp_write_space; + + rcu_assign_pointer(icsk->icsk_ulp_data, ctx); + + sock_set_flag(sk, SOCK_COMP); + comp_setup_strp(sk, ctx); +} + +static void tcp_comp_context_tx_free(struct tcp_comp_context *ctx) +{ + kfree(ctx->tx.cworkspace); + ctx->tx.cworkspace = NULL; + + kvfree(ctx->tx.plaintext_data); + ctx->tx.plaintext_data = NULL; + + kvfree(ctx->tx.compressed_data); + ctx->tx.compressed_data = NULL; +} + +static void tcp_comp_context_rx_free(struct tcp_comp_context *ctx) +{ + kfree(ctx->rx.dworkspace); + ctx->rx.dworkspace = NULL; + + kvfree(ctx->rx.plaintext_data); + ctx->rx.plaintext_data = NULL; +} + +static void tcp_comp_context_free(struct rcu_head *head) +{ + struct tcp_comp_context *ctx; + + ctx = container_of(head, struct tcp_comp_context, rcu); + + tcp_comp_context_tx_free(ctx); + tcp_comp_context_rx_free(ctx); + strp_done(&ctx->rx.strp); + kfree(ctx); +} + +void tcp_cleanup_compression(struct sock *sk) +{ + struct inet_connection_sock *icsk = inet_csk(sk); + struct tcp_comp_context *ctx = comp_get_ctx(sk); + + if (!ctx || !sock_flag(sk, SOCK_COMP)) + return; + + if (ctx->rx.pkt) { + kfree_skb(ctx->rx.pkt); + ctx->rx.pkt = NULL; + } + + if (ctx->rx.dpkt) { + kfree_skb(ctx->rx.dpkt); + ctx->rx.dpkt = NULL; + } + strp_stop(&ctx->rx.strp); + + rcu_assign_pointer(icsk->icsk_ulp_data, NULL); + call_rcu(&ctx->rcu, tcp_comp_context_free); +} + +int tcp_comp_init(void) +{ + tcp_prot_override = tcp_prot; + tcp_prot_override.sendmsg = tcp_comp_sendmsg; + tcp_prot_override.recvmsg = tcp_comp_recvmsg; + tcp_prot_override.sock_is_readable = comp_stream_read; + + return 0; +} diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c index fd5c13c1fbc8..a5adf4822663 100644 --- a/net/ipv4/tcp_input.c +++ b/net/ipv4/tcp_input.c @@ -4012,6 +4012,24 @@ static bool smc_parse_options(const struct tcphdr *th, return false; } +static bool tcp_parse_comp_option(const struct tcphdr *th, + struct tcp_options_received *opt_rx, + const unsigned char *ptr, + int opsize) +{ +#if IS_ENABLED(CONFIG_TCP_COMP) + if (static_branch_unlikely(&tcp_have_comp)) { + if (th->syn && !(opsize & 1) && + opsize >= TCPOLEN_EXP_COMP_BASE && + get_unaligned_be16(ptr) == TCPOPT_COMP_MAGIC) { + opt_rx->comp_ok = 1; + return true; + } + } +#endif + return false; +} + /* Try to parse the MSS option from the TCP header. Return 0 on failure, clamped * value on success. */ @@ -4171,6 +4189,10 @@ void tcp_parse_options(const struct net *net, if (smc_parse_options(th, opt_rx, ptr, opsize)) break; + if (tcp_parse_comp_option(th, opt_rx, ptr, + opsize)) + break; + opt_rx->saw_unknown = 1; break; @@ -6097,6 +6119,7 @@ void tcp_init_transfer(struct sock *sk, int bpf_op, struct sk_buff *skb) /* Initialize congestion control unless BPF initialized it already: */ if (!icsk->icsk_ca_initialized) tcp_init_congestion_control(sk); + tcp_init_compression(sk); tcp_init_buffer_space(sk); } @@ -6835,6 +6858,9 @@ static void tcp_openreq_init(struct request_sock *req, ireq->smc_ok = rx_opt->smc_ok && !(tcp_sk(sk)->smc_hs_congested && tcp_sk(sk)->smc_hs_congested(sk)); #endif +#if IS_ENABLED(CONFIG_TCP_COMP) + ireq->comp_ok = rx_opt->comp_ok; +#endif } struct request_sock *inet_reqsk_alloc(const struct request_sock_ops *ops, diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c index 4167e8a48b60..9cbf23c1c039 100644 --- a/net/ipv4/tcp_ipv4.c +++ b/net/ipv4/tcp_ipv4.c @@ -2304,6 +2304,8 @@ void tcp_v4_destroy_sock(struct sock *sk) tcp_cleanup_congestion_control(sk); + tcp_cleanup_compression(sk); + tcp_cleanup_ulp(sk); /* Cleanup up the write buffer. */ diff --git a/net/ipv4/tcp_minisocks.c b/net/ipv4/tcp_minisocks.c index b98d476f1594..d67a84c114ce 100644 --- a/net/ipv4/tcp_minisocks.c +++ b/net/ipv4/tcp_minisocks.c @@ -543,6 +543,9 @@ struct sock *tcp_create_openreq_child(const struct sock *sk, newtp->rcv_ssthresh = req->rsk_rcv_wnd; newtp->rcv_wnd = req->rsk_rcv_wnd; newtp->rx_opt.wscale_ok = ireq->wscale_ok; +#if IS_ENABLED(CONFIG_TCP_COMP) + newtp->rx_opt.comp_ok = ireq->comp_ok; +#endif if (newtp->rx_opt.wscale_ok) { newtp->rx_opt.snd_wscale = ireq->snd_wscale; newtp->rx_opt.rcv_wscale = ireq->rcv_wscale; diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c index 1917c62ad3bf..eee34f6c7643 100644 --- a/net/ipv4/tcp_output.c +++ b/net/ipv4/tcp_output.c @@ -422,6 +422,7 @@ static inline bool tcp_urg_mode(const struct tcp_sock *tp) #define OPTION_FAST_OPEN_COOKIE BIT(8) #define OPTION_SMC BIT(9) #define OPTION_MPTCP BIT(10) +#define OPTION_COMP BIT(11) static void smc_options_write(__be32 *ptr, u16 *options) { @@ -438,6 +439,19 @@ static void smc_options_write(__be32 *ptr, u16 *options) #endif } +static void comp_options_write(__be32 *ptr, u16 *options) +{ +#if IS_ENABLED(CONFIG_TCP_COMP) + if (static_branch_unlikely(&tcp_have_comp)) { + if (unlikely(OPTION_COMP & *options)) { + *ptr++ = htonl((TCPOPT_EXP << 24) | + (TCPOLEN_EXP_COMP_BASE << 16) | + (TCPOPT_COMP_MAGIC)); + } + } +#endif +} + struct tcp_out_options { u16 options; /* bit field of OPTION_* */ u16 mss; /* 0 to disable */ @@ -711,6 +725,8 @@ static void tcp_options_write(struct tcphdr *th, struct tcp_sock *tp, smc_options_write(ptr, &options); mptcp_options_write(th, ptr, tp, opts); + + comp_options_write(ptr, &options); } static void smc_set_option(const struct tcp_sock *tp, @@ -729,6 +745,39 @@ static void smc_set_option(const struct tcp_sock *tp, #endif } +static void comp_set_option(struct sock *sk, + struct tcp_out_options *opts, + unsigned int *remaining) +{ +#if IS_ENABLED(CONFIG_TCP_COMP) + if (static_branch_unlikely(&tcp_have_comp)) { + if (tcp_syn_comp_enabled(sk)) { + if (*remaining >= TCPOLEN_EXP_COMP_BASE) { + opts->options |= OPTION_COMP; + *remaining -= TCPOLEN_EXP_COMP_BASE; + } + } + } +#endif +} + +static void comp_set_option_cond(struct sock *sk, + const struct inet_request_sock *ireq, + struct tcp_out_options *opts, + unsigned int *remaining) +{ +#if IS_ENABLED(CONFIG_TCP_COMP) + if (static_branch_unlikely(&tcp_have_comp)) { + if (tcp_synack_comp_enabled(sk, ireq)) { + if (*remaining >= TCPOLEN_EXP_COMP_BASE) { + opts->options |= OPTION_COMP; + *remaining -= TCPOLEN_EXP_COMP_BASE; + } + } + } +#endif +} + static void smc_set_option_cond(const struct tcp_sock *tp, const struct inet_request_sock *ireq, struct tcp_out_options *opts, @@ -830,6 +879,7 @@ static unsigned int tcp_syn_options(struct sock *sk, struct sk_buff *skb, } smc_set_option(tp, opts, &remaining); + comp_set_option(sk, opts, &remaining); if (sk_is_mptcp(sk)) { unsigned int size; @@ -910,6 +960,8 @@ static unsigned int tcp_synack_options(const struct sock *sk, smc_set_option_cond(tcp_sk(sk), ireq, opts, &remaining); + comp_set_option_cond((struct sock *)sk, ireq, opts, &remaining); + bpf_skops_hdr_opt_len((struct sock *)sk, skb, req, syn_skb, synack_type, opts, &remaining); diff --git a/net/ipv6/syncookies.c b/net/ipv6/syncookies.c index 8698b49dfc8d..75652826abbd 100644 --- a/net/ipv6/syncookies.c +++ b/net/ipv6/syncookies.c @@ -218,6 +218,10 @@ struct sock *cookie_v6_check(struct sock *sk, struct sk_buff *skb) if (IS_ENABLED(CONFIG_SMC)) ireq->smc_ok = 0; +#if IS_ENABLED(CONFIG_TCP_COMP) + ireq->comp_ok = 0; +#endif + /* * We need to lookup the dst_entry to get the correct window size. * This is taken from tcp_v6_syn_recv_sock. Somebody please enlighten -- 2.34.1

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