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Date: Tue, 15 Mar 2022 13:33:30 +0000
From: Chuck Lever III <chuck.lever@...cle.com>
To: Steven Rostedt <rostedt@...dmis.org>
CC: Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Linux Next Mailing List <linux-next@...r.kernel.org>,
Stephen Rothwell <sfr@...b.auug.org.au>
Subject: Re: linux-next: manual merge of the ftrace tree with the nfsd tree
> On Mar 14, 2022, at 11:58 PM, Stephen Rothwell <sfr@...b.auug.org.au> wrote:
>
> Hi all,
>
> Today's linux-next merge of the ftrace tree got a conflict in:
>
> include/trace/trace_events.h
>
> between commit:
>
> d07c9ad62247 ("tracing: Introduce helpers to safely handle dynamic-sized sockaddrs")
>
> from the nfsd tree and commit:
>
> af6b9668e85f ("tracing: Move the defines to create TRACE_EVENTS into their own files")
>
> from the ftrace tree.
>
> Well, this is a pain :-(
Apologies. Steven, can you take the sockaddr patches in your tree
and resolve the x86_64 build issue?
> I fixed it up (I used the latter version of this file and then added
> the following merge fix patch) and can carry the fix as necessary. This
> is now fixed as far as linux-next is concerned, but any non trivial
> conflicts should be mentioned to your upstream maintainer when your tree
> is submitted for merging. You may also want to consider cooperating
> with the maintainer of the conflicting tree to minimise any particularly
> complex conflicts.
>
> From: Stephen Rothwell <sfr@...b.auug.org.au>
> Date: Tue, 15 Mar 2022 14:47:18 +1100
> Subject: [PATCH] fix up for "tracing: Move the defines to create TRACE_EVENTS into their own files"
>
> Signed-off-by: Stephen Rothwell <sfr@...b.auug.org.au>
> ---
> include/trace/stages/stage1_defines.h | 6 ++++++
> include/trace/stages/stage2_defines.h | 10 ++++++++--
> include/trace/stages/stage3_defines.h | 6 ++++++
> include/trace/stages/stage4_defines.h | 6 ++++++
> include/trace/stages/stage5_defines.h | 6 ++++++
> include/trace/stages/stage6_defines.h | 18 ++++++++++++++++++
> include/trace/stages/stage7_defines.h | 2 ++
> 7 files changed, 52 insertions(+), 2 deletions(-)
>
> diff --git a/include/trace/stages/stage1_defines.h b/include/trace/stages/stage1_defines.h
> index 8ab88c766d2b..a16783419687 100644
> --- a/include/trace/stages/stage1_defines.h
> +++ b/include/trace/stages/stage1_defines.h
> @@ -29,6 +29,9 @@
> #undef __bitmask
> #define __bitmask(item, nr_bits) __dynamic_array(char, item, -1)
>
> +#undef __sockaddr
> +#define __sockaddr(field, len) __dynamic_array(u8, field, len)
> +
> #undef __rel_dynamic_array
> #define __rel_dynamic_array(type, item, len) u32 __rel_loc_##item;
>
> @@ -41,5 +44,8 @@
> #undef __rel_bitmask
> #define __rel_bitmask(item, nr_bits) __rel_dynamic_array(char, item, -1)
>
> +#undef __rel_sockaddr
> +#define __rel_sockaddr(field, len) __rel_dynamic_array(u8, field, len)
> +
> #undef TP_STRUCT__entry
> #define TP_STRUCT__entry(args...) args
> diff --git a/include/trace/stages/stage2_defines.h b/include/trace/stages/stage2_defines.h
> index 9f2341df40da..42fd1e8813ec 100644
> --- a/include/trace/stages/stage2_defines.h
> +++ b/include/trace/stages/stage2_defines.h
> @@ -29,11 +29,14 @@
> #undef __string
> #define __string(item, src) __dynamic_array(char, item, -1)
>
> +#undef __string_len
> +#define __string_len(item, src, len) __dynamic_array(char, item, -1)
> +
> #undef __bitmask
> #define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1)
>
> -#undef __string_len
> -#define __string_len(item, src, len) __dynamic_array(char, item, -1)
> +#undef __sockaddr
> +#define __sockaddr(field, len) __dynamic_array(u8, field, len)
>
> #undef __rel_dynamic_array
> #define __rel_dynamic_array(type, item, len) u32 item;
> @@ -46,3 +49,6 @@
>
> #undef __rel_bitmask
> #define __rel_bitmask(item, nr_bits) __rel_dynamic_array(unsigned long, item, -1)
> +
> +#undef __rel_sockaddr
> +#define __rel_sockaddr(field, len) __rel_dynamic_array(u8, field, len)
> diff --git a/include/trace/stages/stage3_defines.h b/include/trace/stages/stage3_defines.h
> index 0bc131993b7a..e3b183e9d18e 100644
> --- a/include/trace/stages/stage3_defines.h
> +++ b/include/trace/stages/stage3_defines.h
> @@ -51,6 +51,12 @@
> trace_print_bitmask_seq(p, __bitmask, __bitmask_size); \
> })
>
> +#undef __get_sockaddr
> +#define __get_sockaddr(field) ((struct sockaddr *)__get_dynamic_array(field))
> +
> +#undef __get_rel_sockaddr
> +#define __get_rel_sockaddr(field) ((struct sockaddr *)__get_rel_dynamic_array(field))
> +
> #undef __print_flags
> #define __print_flags(flag, delim, flag_array...) \
> ({ \
> diff --git a/include/trace/stages/stage4_defines.h b/include/trace/stages/stage4_defines.h
> index 780a10fa5279..e80cdc397a43 100644
> --- a/include/trace/stages/stage4_defines.h
> +++ b/include/trace/stages/stage4_defines.h
> @@ -41,6 +41,9 @@
> #undef __bitmask
> #define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1)
>
> +#undef __sockaddr
> +#define __sockaddr(field, len) __dynamic_array(u8, field, len)
> +
> #undef __rel_dynamic_array
> #define __rel_dynamic_array(_type, _item, _len) { \
> .type = "__rel_loc " #_type "[]", .name = #_item, \
> @@ -55,3 +58,6 @@
>
> #undef __rel_bitmask
> #define __rel_bitmask(item, nr_bits) __rel_dynamic_array(unsigned long, item, -1)
> +
> +#undef __rel_sockaddr
> +#define __rel_sockaddr(field, len) __rel_dynamic_array(u8, field, len)
> diff --git a/include/trace/stages/stage5_defines.h b/include/trace/stages/stage5_defines.h
> index fb15394aae31..7ee5931300e6 100644
> --- a/include/trace/stages/stage5_defines.h
> +++ b/include/trace/stages/stage5_defines.h
> @@ -81,3 +81,9 @@
> #undef __rel_bitmask
> #define __rel_bitmask(item, nr_bits) __rel_dynamic_array(unsigned long, item, \
> __bitmask_size_in_longs(nr_bits))
> +
> +#undef __sockaddr
> +#define __sockaddr(field, len) __dynamic_array(u8, field, len)
> +
> +#undef __rel_sockaddr
> +#define __rel_sockaddr(field, len) __rel_dynamic_array(u8, field, len)
> diff --git a/include/trace/stages/stage6_defines.h b/include/trace/stages/stage6_defines.h
> index b3a1f26026be..2ac88e1a7677 100644
> --- a/include/trace/stages/stage6_defines.h
> +++ b/include/trace/stages/stage6_defines.h
> @@ -45,6 +45,15 @@
> #define __assign_bitmask(dst, src, nr_bits) \
> memcpy(__get_bitmask(dst), (src), __bitmask_size_in_bytes(nr_bits))
>
> +#undef __sockaddr
> +#define __sockaddr(field, len) __dynamic_array(u8, field, len)
> +
> +#undef __get_sockaddr
> +#define __get_sockaddr(field) ((struct sockaddr *)__get_dynamic_array(field))
> +
> +#define __assign_sockaddr(dest, src, len) \
> + memcpy(__get_dynamic_array(dest), src, len)
> +
> #undef __rel_dynamic_array
> #define __rel_dynamic_array(type, item, len) \
> __entry->__rel_loc_##item = __data_offsets.item;
> @@ -76,6 +85,15 @@
> #define __assign_rel_bitmask(dst, src, nr_bits) \
> memcpy(__get_rel_bitmask(dst), (src), __bitmask_size_in_bytes(nr_bits))
>
> +#undef __rel_sockaddr
> +#define __rel_sockaddr(field, len) __rel_dynamic_array(u8, field, len)
> +
> +#undef __get_rel_sockaddr
> +#define __get_rel_sockaddr(field) ((struct sockaddr *)__get_rel_dynamic_array(field))
> +
> +#define __assign_rel_sockaddr(dest, src, len) \
> + memcpy(__get_rel_dynamic_array(dest), src, len)
> +
> #undef TP_fast_assign
> #define TP_fast_assign(args...) args
>
> diff --git a/include/trace/stages/stage7_defines.h b/include/trace/stages/stage7_defines.h
> index d65445328f18..8a7ec24c246d 100644
> --- a/include/trace/stages/stage7_defines.h
> +++ b/include/trace/stages/stage7_defines.h
> @@ -13,10 +13,12 @@
> #undef __get_dynamic_array_len
> #undef __get_str
> #undef __get_bitmask
> +#undef __get_sockaddr
> #undef __get_rel_dynamic_array
> #undef __get_rel_dynamic_array_len
> #undef __get_rel_str
> #undef __get_rel_bitmask
> +#undef __get_rel_sockaddr
> #undef __print_array
> #undef __print_hex_dump
>
> --
> 2.34.1
>
> However, my x86_64 allmodconfig build then failed like this:
>
> In file included from include/trace/define_custom_trace.h:55,
> from samples/trace_events/trace_custom_sched.h:95,
> from samples/trace_events/trace_custom_sched.c:24:
> samples/trace_events/./trace_custom_sched.h: In function 'ftrace_test_custom_probe_sched_switch':
> include/trace/trace_custom_events.h:178:42: error: passing argument 1 of 'check_trace_callback_type_sched_switch' from incompatible pointer type [-Werror=incompatible-pointer-types]
> 178 | check_trace_callback_type_##call(trace_custom_event_raw_event_##template); \
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> | |
> | void (*)(void *, bool, struct task_struct *, struct task_struct *) {aka void (*)(void *, _Bool, struct task_struct *, struct task_struct *)}
> include/trace/trace_custom_events.h:34:9: note: in expansion of macro 'DEFINE_CUSTOM_EVENT'
> 34 | DEFINE_CUSTOM_EVENT(name, name, PARAMS(proto), PARAMS(args));
> | ^~~~~~~~~~~~~~~~~~~
> samples/trace_events/./trace_custom_sched.h:21:1: note: in expansion of macro 'TRACE_CUSTOM_EVENT'
> 21 | TRACE_CUSTOM_EVENT(sched_switch,
> | ^~~~~~~~~~~~~~~~~~
> In file included from include/linux/trace_events.h:11,
> from samples/trace_events/trace_custom_sched.c:10:
> include/linux/tracepoint.h:279:49: note: expected 'void (*)(void *, bool, unsigned int, struct task_struct *, struct task_struct *)' {aka 'void (*)(void *, _Bool, unsigned int, struct task_struct *, struct task_struct *)'} but argument is of type 'void (*)(void *, bool, struct task_struct *, struct task_struct *)' {aka 'void (*)(void *, _Bool, struct task_struct *, struct task_struct *)'}
> 279 | check_trace_callback_type_##name(void (*cb)(data_proto)) \
> | ~~~~~~~^~~~~~~~~~~~~~~
> include/linux/tracepoint.h:419:9: note: in expansion of macro '__DECLARE_TRACE'
> 419 | __DECLARE_TRACE(name, PARAMS(proto), PARAMS(args), \
> | ^~~~~~~~~~~~~~~
> include/linux/tracepoint.h:553:9: note: in expansion of macro 'DECLARE_TRACE'
> 553 | DECLARE_TRACE(name, PARAMS(proto), PARAMS(args))
> | ^~~~~~~~~~~~~
> include/trace/events/sched.h:222:1: note: in expansion of macro 'TRACE_EVENT'
> 222 | TRACE_EVENT(sched_switch,
> | ^~~~~~~~~~~
>
> So I gave up and uses the ftrace tree from next-20220310 for today.
>
> I am going to need some help with this mess, please.
> --
> Cheers,
> Stephen Rothwell
--
Chuck Lever
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