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| author | Zeng Chi <zengchi@kylinos.cn> | 2026-09-21 18:24:42 +0800 |
|---|---|---|
| committer | Sean Christopherson <seanjc@google.com> | 2026-09-22 08:36:16 -0700 |
| commit | 119e9db233ad0f4cbd4cfb9f9385a7bca378b37d (patch) | |
| tree | 660d50d4139cb750fbde1ae3432452c20726c99d /include/trace/events/fib.h | |
| download | linux-stable-119e9db233ad0f4cbd4cfb9f9385a7bca378b37d.tar.gz linux-stable-119e9db233ad0f4cbd4cfb9f9385a7bca378b37d.zip | |
KVM: Don't pre-reserve xarray entries when storing empty/NULL attributesgrafted
Skip the xarray reservation loop when clearing all memory attributes, as
storing NULL only erases the entry and never needs to allocate, so no
reservation (and no cleanup of a failed one) is required in that case.
Suggested-by: Sean Christopherson <seanjc@google.com>
Cc: David Ballesteros <davimaba.v@proton.me>
Signed-off-by: Zeng Chi <zengchi@kylinos.cn>
Link: https://patch.msgid.link/20260921102442.1232375-1-zeng_chi911@163.com
[sean: split to separate patch]
Signed-off-by: Sean Christopherson <seanjc@google.com>
Diffstat (limited to 'include/trace/events/fib.h')
| -rw-r--r-- | include/trace/events/fib.h | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/include/trace/events/fib.h b/include/trace/events/fib.h new file mode 100644 index 000000000..feb28b359 --- /dev/null +++ b/include/trace/events/fib.h @@ -0,0 +1,104 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#undef TRACE_SYSTEM +#define TRACE_SYSTEM fib + +#if !defined(_TRACE_FIB_H) || defined(TRACE_HEADER_MULTI_READ) +#define _TRACE_FIB_H + +#include <linux/skbuff.h> +#include <linux/netdevice.h> +#include <net/flow.h> +#include <net/inet_dscp.h> +#include <net/ip_fib.h> +#include <linux/tracepoint.h> + +TRACE_EVENT(fib_table_lookup, + + TP_PROTO(u32 tb_id, const struct flowi4 *flp, + const struct fib_nh_common *nhc, int err), + + TP_ARGS(tb_id, flp, nhc, err), + + TP_STRUCT__entry( + __field( u32, tb_id ) + __field( int, err ) + __field( int, oif ) + __field( int, iif ) + __field( u8, proto ) + __field( __u8, tos ) + __field( __u8, scope ) + __field( __u8, flags ) + __array( __u8, src, 4 ) + __array( __u8, dst, 4 ) + __array( __u8, gw4, 4 ) + __array( __u8, gw6, 16 ) + __field( u16, sport ) + __field( u16, dport ) + __array(char, name, IFNAMSIZ ) + ), + + TP_fast_assign( + struct net_device *dev; + struct in6_addr *in6; + __be32 *p32; + + __entry->tb_id = tb_id; + __entry->err = err; + __entry->oif = flp->flowi4_oif; + __entry->iif = flp->flowi4_iif; + __entry->tos = inet_dscp_to_dsfield(flp->flowi4_dscp); + __entry->scope = flp->flowi4_scope; + __entry->flags = flp->flowi4_flags; + + p32 = (__be32 *) __entry->src; + *p32 = flp->saddr; + + p32 = (__be32 *) __entry->dst; + *p32 = flp->daddr; + + __entry->proto = flp->flowi4_proto; + if (__entry->proto == IPPROTO_TCP || + __entry->proto == IPPROTO_UDP) { + __entry->sport = ntohs(flp->fl4_sport); + __entry->dport = ntohs(flp->fl4_dport); + } else { + __entry->sport = 0; + __entry->dport = 0; + } + + dev = nhc ? nhc->nhc_dev : NULL; + strscpy(__entry->name, dev ? dev->name : "-", IFNAMSIZ); + + if (nhc) { + if (nhc->nhc_gw_family == AF_INET) { + p32 = (__be32 *) __entry->gw4; + *p32 = nhc->nhc_gw.ipv4; + + in6 = (struct in6_addr *)__entry->gw6; + *in6 = in6addr_any; + } else if (nhc->nhc_gw_family == AF_INET6) { + p32 = (__be32 *) __entry->gw4; + *p32 = 0; + + in6 = (struct in6_addr *)__entry->gw6; + *in6 = nhc->nhc_gw.ipv6; + } + } else { + p32 = (__be32 *) __entry->gw4; + *p32 = 0; + + in6 = (struct in6_addr *)__entry->gw6; + *in6 = in6addr_any; + } + ), + + TP_printk("table %u oif %d iif %d proto %u %pI4/%u -> %pI4/%u tos %d scope %d flags %x ==> dev %s gw %pI4/%pI6c err %d", + __entry->tb_id, __entry->oif, __entry->iif, __entry->proto, + __entry->src, __entry->sport, __entry->dst, __entry->dport, + __entry->tos, __entry->scope, __entry->flags, + __entry->name, __entry->gw4, __entry->gw6, __entry->err) +); +#endif /* _TRACE_FIB_H */ + +/* This part must be outside protection */ +#include <trace/define_trace.h> |