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Message-Id: <20190827013634.3173-10-acme@kernel.org>
Date: Mon, 26 Aug 2019 22:36:10 -0300
From: Arnaldo Carvalho de Melo <acme@...nel.org>
To: Ingo Molnar <mingo@...nel.org>,
Thomas Gleixner <tglx@...utronix.de>
Cc: Jiri Olsa <jolsa@...nel.org>, Namhyung Kim <namhyung@...nel.org>,
Clark Williams <williams@...hat.com>,
linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
Arnaldo Carvalho de Melo <acme@...hat.com>,
Adrian Hunter <adrian.hunter@...el.com>
Subject: [PATCH 09/33] perf augmented_raw_syscalls: Rename augmented_filename to augmented_arg
From: Arnaldo Carvalho de Melo <acme@...hat.com>
Because it is not used only for strings, we already use it for sockaddr
structs and will use it for all other types.
Cc: Adrian Hunter <adrian.hunter@...el.com>
Cc: Jiri Olsa <jolsa@...nel.org>
Cc: Namhyung Kim <namhyung@...nel.org>
Link: https://lkml.kernel.org/n/tip-w9nkt3tvmyn5i4qnwng3ap1k@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
.../examples/bpf/augmented_raw_syscalls.c | 42 +++++++++----------
1 file changed, 20 insertions(+), 22 deletions(-)
diff --git a/tools/perf/examples/bpf/augmented_raw_syscalls.c b/tools/perf/examples/bpf/augmented_raw_syscalls.c
index 79787cf4fce9..b85b177c6726 100644
--- a/tools/perf/examples/bpf/augmented_raw_syscalls.c
+++ b/tools/perf/examples/bpf/augmented_raw_syscalls.c
@@ -60,7 +60,7 @@ struct syscall_exit_args {
long ret;
};
-struct augmented_filename {
+struct augmented_arg {
unsigned int size;
int err;
char value[PATH_MAX];
@@ -72,8 +72,7 @@ struct augmented_args_payload {
struct syscall_enter_args args;
union {
struct {
- struct augmented_filename filename,
- filename2;
+ struct augmented_arg arg, arg2;
};
struct sockaddr_storage saddr;
};
@@ -82,31 +81,30 @@ struct augmented_args_payload {
bpf_map(augmented_args_tmp, PERCPU_ARRAY, int, struct augmented_args_payload, 1);
static inline
-unsigned int augmented_filename__read(struct augmented_filename *augmented_filename,
- const void *filename_arg, unsigned int filename_len)
+unsigned int augmented_arg__read_str(struct augmented_arg *augmented_arg, const void *arg, unsigned int arg_len)
{
- unsigned int len = sizeof(*augmented_filename);
- int size = probe_read_str(&augmented_filename->value, filename_len, filename_arg);
+ unsigned int augmented_len = sizeof(*augmented_arg);
+ int string_len = probe_read_str(&augmented_arg->value, arg_len, arg);
- augmented_filename->size = augmented_filename->err = 0;
+ augmented_arg->size = augmented_arg->err = 0;
/*
* probe_read_str may return < 0, e.g. -EFAULT
- * So we leave that in the augmented_filename->size that userspace will
+ * So we leave that in the augmented_arg->size that userspace will
*/
- if (size > 0) {
- len -= sizeof(augmented_filename->value) - size;
- len &= sizeof(augmented_filename->value) - 1;
- augmented_filename->size = size;
+ if (string_len > 0) {
+ augmented_len -= sizeof(augmented_arg->value) - string_len;
+ augmented_len &= sizeof(augmented_arg->value) - 1;
+ augmented_arg->size = string_len;
} else {
/*
* So that username notice the error while still being able
* to skip this augmented arg record
*/
- augmented_filename->err = size;
- len = offsetof(struct augmented_filename, value);
+ augmented_arg->err = string_len;
+ augmented_len = offsetof(struct augmented_arg, value);
}
- return len;
+ return augmented_len;
}
SEC("!raw_syscalls:unaugmented")
@@ -174,7 +172,7 @@ int sys_enter_open(struct syscall_enter_args *args)
if (augmented_args == NULL)
return 1; /* Failure: don't filter */
- len += augmented_filename__read(&augmented_args->filename, filename_arg, sizeof(augmented_args->filename.value));
+ len += augmented_arg__read_str(&augmented_args->arg, filename_arg, sizeof(augmented_args->arg.value));
/* If perf_event_output fails, return non-zero so that it gets recorded unaugmented */
return perf_event_output(args, &__augmented_syscalls__, BPF_F_CURRENT_CPU, augmented_args, len);
@@ -191,7 +189,7 @@ int sys_enter_openat(struct syscall_enter_args *args)
if (augmented_args == NULL)
return 1; /* Failure: don't filter */
- len += augmented_filename__read(&augmented_args->filename, filename_arg, sizeof(augmented_args->filename.value));
+ len += augmented_arg__read_str(&augmented_args->arg, filename_arg, sizeof(augmented_args->arg.value));
/* If perf_event_output fails, return non-zero so that it gets recorded unaugmented */
return perf_event_output(args, &__augmented_syscalls__, BPF_F_CURRENT_CPU, augmented_args, len);
@@ -209,8 +207,8 @@ int sys_enter_rename(struct syscall_enter_args *args)
if (augmented_args == NULL)
return 1; /* Failure: don't filter */
- oldpath_len = augmented_filename__read(&augmented_args->filename, oldpath_arg, sizeof(augmented_args->filename.value));
- len += oldpath_len + augmented_filename__read((void *)(&augmented_args->filename) + oldpath_len, newpath_arg, sizeof(augmented_args->filename.value));
+ oldpath_len = augmented_arg__read_str(&augmented_args->arg, oldpath_arg, sizeof(augmented_args->arg.value));
+ len += oldpath_len + augmented_arg__read_str((void *)(&augmented_args->arg) + oldpath_len, newpath_arg, sizeof(augmented_args->arg.value));
/* If perf_event_output fails, return non-zero so that it gets recorded unaugmented */
return perf_event_output(args, &__augmented_syscalls__, BPF_F_CURRENT_CPU, augmented_args, len);
@@ -228,8 +226,8 @@ int sys_enter_renameat(struct syscall_enter_args *args)
if (augmented_args == NULL)
return 1; /* Failure: don't filter */
- oldpath_len = augmented_filename__read(&augmented_args->filename, oldpath_arg, sizeof(augmented_args->filename.value));
- len += oldpath_len + augmented_filename__read((void *)(&augmented_args->filename) + oldpath_len, newpath_arg, sizeof(augmented_args->filename.value));
+ oldpath_len = augmented_arg__read_str(&augmented_args->arg, oldpath_arg, sizeof(augmented_args->arg.value));
+ len += oldpath_len + augmented_arg__read_str((void *)(&augmented_args->arg) + oldpath_len, newpath_arg, sizeof(augmented_args->arg.value));
/* If perf_event_output fails, return non-zero so that it gets recorded unaugmented */
return perf_event_output(args, &__augmented_syscalls__, BPF_F_CURRENT_CPU, augmented_args, len);
--
2.21.0
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