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tracing/user_events: Update self-tests to write ABI

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ABI has been changed to remote writes, update existing test cases to use
this new ABI to ensure existing functionality continues to work.

Link: https://lkml.kernel.org/r/20230328235219.203-7-beaub@linux.microsoft.com

Signed-off-by: Beau Belgrave <beaub@linux.microsoft.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
This commit is contained in:
Beau Belgrave 2023-03-28 16:52:13 -07:00 committed by Steven Rostedt (Google)
parent dcb8177c13
commit 0d309f04f8
2 changed files with 96 additions and 89 deletions
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152
tools/testing/selftests/user_events/ftrace_test.c
View File

@ -12,6 +12,7 @@
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/uio.h>
#include <unistd.h>
#include "../kselftest_harness.h"
@ -22,11 +23,6 @@ const char *enable_file = "/sys/kernel/tracing/events/user_events/__test_event/e
const char *trace_file = "/sys/kernel/tracing/trace";
const char *fmt_file = "/sys/kernel/tracing/events/user_events/__test_event/format";
static inline int status_check(char *status_page, int status_bit)
{
return status_page[status_bit >> 3] & (1 << (status_bit & 7));
}
static int trace_bytes(void)
{
int fd = open(trace_file, O_RDONLY);
@ -106,13 +102,23 @@ err:
return -1;
}
static int clear(void)
static int clear(int *check)
{
struct user_unreg unreg = {0};
unreg.size = sizeof(unreg);
unreg.disable_bit = 31;
unreg.disable_addr = (__u64)check;
int fd = open(data_file, O_RDWR);
if (fd == -1)
return -1;
if (ioctl(fd, DIAG_IOCSUNREG, &unreg) == -1)
if (errno != ENOENT)
return -1;
if (ioctl(fd, DIAG_IOCSDEL, "__test_event") == -1)
if (errno != ENOENT)
return -1;
@ -122,7 +128,7 @@ static int clear(void)
return 0;
}
static int check_print_fmt(const char *event, const char *expected)
static int check_print_fmt(const char *event, const char *expected, int *check)
{
struct user_reg reg = {0};
char print_fmt[256];
@ -130,7 +136,7 @@ static int check_print_fmt(const char *event, const char *expected)
int fd;
/* Ensure cleared */
ret = clear();
ret = clear(check);
if (ret != 0)
return ret;
@ -142,14 +148,19 @@ static int check_print_fmt(const char *event, const char *expected)
reg.size = sizeof(reg);
reg.name_args = (__u64)event;
reg.enable_bit = 31;
reg.enable_addr = (__u64)check;
reg.enable_size = sizeof(*check);
/* Register should work */
ret = ioctl(fd, DIAG_IOCSREG, &reg);
close(fd);
if (ret != 0)
if (ret != 0) {
printf("Reg failed in fmt\n");
return ret;
}
/* Ensure correct print_fmt */
ret = get_print_fmt(print_fmt, sizeof(print_fmt));
@ -164,6 +175,7 @@ FIXTURE(user) {
int status_fd;
int data_fd;
int enable_fd;
int check;
};
FIXTURE_SETUP(user) {
@ -185,59 +197,56 @@ FIXTURE_TEARDOWN(user) {
close(self->enable_fd);
}
ASSERT_EQ(0, clear());
if (clear(&self->check) != 0)
printf("WARNING: Clear didn't work!\n");
}
TEST_F(user, register_events) {
struct user_reg reg = {0};
int page_size = sysconf(_SC_PAGESIZE);
char *status_page;
struct user_unreg unreg = {0};
reg.size = sizeof(reg);
reg.name_args = (__u64)"__test_event u32 field1; u32 field2";
reg.enable_bit = 31;
reg.enable_addr = (__u64)&self->check;
reg.enable_size = sizeof(self->check);
status_page = mmap(NULL, page_size, PROT_READ, MAP_SHARED,
self->status_fd, 0);
unreg.size = sizeof(unreg);
unreg.disable_bit = 31;
unreg.disable_addr = (__u64)&self->check;
/* Register should work */
ASSERT_EQ(0, ioctl(self->data_fd, DIAG_IOCSREG, &reg));
ASSERT_EQ(0, reg.write_index);
ASSERT_NE(0, reg.status_bit);
/* Multiple registers should result in same index */
ASSERT_EQ(0, ioctl(self->data_fd, DIAG_IOCSREG, &reg));
ASSERT_EQ(0, reg.write_index);
ASSERT_NE(0, reg.status_bit);
/* Ensure disabled */
self->enable_fd = open(enable_file, O_RDWR);
ASSERT_NE(-1, self->enable_fd);
ASSERT_NE(-1, write(self->enable_fd, "0", sizeof("0")))
/* MMAP should work and be zero'd */
ASSERT_NE(MAP_FAILED, status_page);
ASSERT_NE(NULL, status_page);
ASSERT_EQ(0, status_check(status_page, reg.status_bit));
/* Enable event and ensure bits updated in status */
ASSERT_NE(-1, write(self->enable_fd, "1", sizeof("1")))
ASSERT_NE(0, status_check(status_page, reg.status_bit));
ASSERT_EQ(1 << reg.enable_bit, self->check);
/* Disable event and ensure bits updated in status */
ASSERT_NE(-1, write(self->enable_fd, "0", sizeof("0")))
ASSERT_EQ(0, status_check(status_page, reg.status_bit));
ASSERT_EQ(0, self->check);
/* File still open should return -EBUSY for delete */
ASSERT_EQ(-1, ioctl(self->data_fd, DIAG_IOCSDEL, "__test_event"));
ASSERT_EQ(EBUSY, errno);
/* Delete should work only after close */
/* Unregister */
ASSERT_EQ(0, ioctl(self->data_fd, DIAG_IOCSUNREG, &unreg));
/* Delete should work only after close and unregister */
close(self->data_fd);
self->data_fd = open(data_file, O_RDWR);
ASSERT_EQ(0, ioctl(self->data_fd, DIAG_IOCSDEL, "__test_event"));
/* Unmap should work */
ASSERT_EQ(0, munmap(status_page, page_size));
}
TEST_F(user, write_events) {
@ -245,11 +254,12 @@ TEST_F(user, write_events) {
struct iovec io[3];
__u32 field1, field2;
int before = 0, after = 0;
int page_size = sysconf(_SC_PAGESIZE);
char *status_page;
reg.size = sizeof(reg);
reg.name_args = (__u64)"__test_event u32 field1; u32 field2";
reg.enable_bit = 31;
reg.enable_addr = (__u64)&self->check;
reg.enable_size = sizeof(self->check);
field1 = 1;
field2 = 2;
@ -261,18 +271,10 @@ TEST_F(user, write_events) {
io[2].iov_base = &field2;
io[2].iov_len = sizeof(field2);
status_page = mmap(NULL, page_size, PROT_READ, MAP_SHARED,
self->status_fd, 0);
/* Register should work */
ASSERT_EQ(0, ioctl(self->data_fd, DIAG_IOCSREG, &reg));
ASSERT_EQ(0, reg.write_index);
ASSERT_NE(0, reg.status_bit);
/* MMAP should work and be zero'd */
ASSERT_NE(MAP_FAILED, status_page);
ASSERT_NE(NULL, status_page);
ASSERT_EQ(0, status_check(status_page, reg.status_bit));
ASSERT_EQ(0, self->check);
/* Write should fail on invalid slot with ENOENT */
io[0].iov_base = &field2;
@ -287,7 +289,7 @@ TEST_F(user, write_events) {
ASSERT_NE(-1, write(self->enable_fd, "1", sizeof("1")))
/* Event should now be enabled */
ASSERT_NE(0, status_check(status_page, reg.status_bit));
ASSERT_NE(1 << reg.enable_bit, self->check);
/* Write should make it out to ftrace buffers */
before = trace_bytes();
@ -304,6 +306,9 @@ TEST_F(user, write_fault) {
reg.size = sizeof(reg);
reg.name_args = (__u64)"__test_event u64 anon";
reg.enable_bit = 31;
reg.enable_addr = (__u64)&self->check;
reg.enable_size = sizeof(self->check);
anon = mmap(NULL, l, PROT_READ, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
ASSERT_NE(MAP_FAILED, anon);
@ -316,7 +321,6 @@ TEST_F(user, write_fault) {
/* Register should work */
ASSERT_EQ(0, ioctl(self->data_fd, DIAG_IOCSREG, &reg));
ASSERT_EQ(0, reg.write_index);
ASSERT_NE(0, reg.status_bit);
/* Write should work normally */
ASSERT_NE(-1, writev(self->data_fd, (const struct iovec *)io, 2));
@ -333,24 +337,17 @@ TEST_F(user, write_validator) {
int loc, bytes;
char data[8];
int before = 0, after = 0;
int page_size = sysconf(_SC_PAGESIZE);
char *status_page;
status_page = mmap(NULL, page_size, PROT_READ, MAP_SHARED,
self->status_fd, 0);
reg.size = sizeof(reg);
reg.name_args = (__u64)"__test_event __rel_loc char[] data";
reg.enable_bit = 31;
reg.enable_addr = (__u64)&self->check;
reg.enable_size = sizeof(self->check);
/* Register should work */
ASSERT_EQ(0, ioctl(self->data_fd, DIAG_IOCSREG, &reg));
ASSERT_EQ(0, reg.write_index);
ASSERT_NE(0, reg.status_bit);
/* MMAP should work and be zero'd */
ASSERT_NE(MAP_FAILED, status_page);
ASSERT_NE(NULL, status_page);
ASSERT_EQ(0, status_check(status_page, reg.status_bit));
ASSERT_EQ(0, self->check);
io[0].iov_base = &reg.write_index;
io[0].iov_len = sizeof(reg.write_index);
@ -369,7 +366,7 @@ TEST_F(user, write_validator) {
ASSERT_NE(-1, write(self->enable_fd, "1", sizeof("1")))
/* Event should now be enabled */
ASSERT_NE(0, status_check(status_page, reg.status_bit));
ASSERT_EQ(1 << reg.enable_bit, self->check);
/* Full in-bounds write should work */
before = trace_bytes();
@ -409,71 +406,88 @@ TEST_F(user, print_fmt) {
int ret;
ret = check_print_fmt("__test_event __rel_loc char[] data",
"print fmt: \"data=%s\", __get_rel_str(data)");
"print fmt: \"data=%s\", __get_rel_str(data)",
&self->check);
ASSERT_EQ(0, ret);
ret = check_print_fmt("__test_event __data_loc char[] data",
"print fmt: \"data=%s\", __get_str(data)");
"print fmt: \"data=%s\", __get_str(data)",
&self->check);
ASSERT_EQ(0, ret);
ret = check_print_fmt("__test_event s64 data",
"print fmt: \"data=%lld\", REC->data");
"print fmt: \"data=%lld\", REC->data",
&self->check);
ASSERT_EQ(0, ret);
ret = check_print_fmt("__test_event u64 data",
"print fmt: \"data=%llu\", REC->data");
"print fmt: \"data=%llu\", REC->data",
&self->check);
ASSERT_EQ(0, ret);
ret = check_print_fmt("__test_event s32 data",
"print fmt: \"data=%d\", REC->data");
"print fmt: \"data=%d\", REC->data",
&self->check);
ASSERT_EQ(0, ret);
ret = check_print_fmt("__test_event u32 data",
"print fmt: \"data=%u\", REC->data");
"print fmt: \"data=%u\", REC->data",
&self->check);
ASSERT_EQ(0, ret);
ret = check_print_fmt("__test_event int data",
"print fmt: \"data=%d\", REC->data");
"print fmt: \"data=%d\", REC->data",
&self->check);
ASSERT_EQ(0, ret);
ret = check_print_fmt("__test_event unsigned int data",
"print fmt: \"data=%u\", REC->data");
"print fmt: \"data=%u\", REC->data",
&self->check);
ASSERT_EQ(0, ret);
ret = check_print_fmt("__test_event s16 data",
"print fmt: \"data=%d\", REC->data");
"print fmt: \"data=%d\", REC->data",
&self->check);
ASSERT_EQ(0, ret);
ret = check_print_fmt("__test_event u16 data",
"print fmt: \"data=%u\", REC->data");
"print fmt: \"data=%u\", REC->data",
&self->check);
ASSERT_EQ(0, ret);
ret = check_print_fmt("__test_event short data",
"print fmt: \"data=%d\", REC->data");
"print fmt: \"data=%d\", REC->data",
&self->check);
ASSERT_EQ(0, ret);
ret = check_print_fmt("__test_event unsigned short data",
"print fmt: \"data=%u\", REC->data");
"print fmt: \"data=%u\", REC->data",
&self->check);
ASSERT_EQ(0, ret);
ret = check_print_fmt("__test_event s8 data",
"print fmt: \"data=%d\", REC->data");
"print fmt: \"data=%d\", REC->data",
&self->check);
ASSERT_EQ(0, ret);
ret = check_print_fmt("__test_event u8 data",
"print fmt: \"data=%u\", REC->data");
"print fmt: \"data=%u\", REC->data",
&self->check);
ASSERT_EQ(0, ret);
ret = check_print_fmt("__test_event char data",
"print fmt: \"data=%d\", REC->data");
"print fmt: \"data=%d\", REC->data",
&self->check);
ASSERT_EQ(0, ret);
ret = check_print_fmt("__test_event unsigned char data",
"print fmt: \"data=%u\", REC->data");
"print fmt: \"data=%u\", REC->data",
&self->check);
ASSERT_EQ(0, ret);
ret = check_print_fmt("__test_event char[4] data",
"print fmt: \"data=%s\", REC->data");
"print fmt: \"data=%s\", REC->data",
&self->check);
ASSERT_EQ(0, ret);
}

33
tools/testing/selftests/user_events/perf_test.c
View File

@ -19,7 +19,6 @@
#include "../kselftest_harness.h"
const char *data_file = "/sys/kernel/tracing/user_events_data";
const char *status_file = "/sys/kernel/tracing/user_events_status";
const char *id_file = "/sys/kernel/tracing/events/user_events/__test_event/id";
const char *fmt_file = "/sys/kernel/tracing/events/user_events/__test_event/format";
@ -35,11 +34,6 @@ static long perf_event_open(struct perf_event_attr *pe, pid_t pid,
return syscall(__NR_perf_event_open, pe, pid, cpu, group_fd, flags);
}
static inline int status_check(char *status_page, int status_bit)
{
return status_page[status_bit >> 3] & (1 << (status_bit & 7));
}
static int get_id(void)
{
FILE *fp = fopen(id_file, "r");
@ -88,45 +82,38 @@ static int get_offset(void)
}
FIXTURE(user) {
int status_fd;
int data_fd;
int check;
};
FIXTURE_SETUP(user) {
self->status_fd = open(status_file, O_RDONLY);
ASSERT_NE(-1, self->status_fd);
self->data_fd = open(data_file, O_RDWR);
ASSERT_NE(-1, self->data_fd);
}
FIXTURE_TEARDOWN(user) {
close(self->status_fd);
close(self->data_fd);
}
TEST_F(user, perf_write) {
struct perf_event_attr pe = {0};
struct user_reg reg = {0};
int page_size = sysconf(_SC_PAGESIZE);
char *status_page;
struct event event;
struct perf_event_mmap_page *perf_page;
int page_size = sysconf(_SC_PAGESIZE);
int id, fd, offset;
__u32 *val;
reg.size = sizeof(reg);
reg.name_args = (__u64)"__test_event u32 field1; u32 field2";
status_page = mmap(NULL, page_size, PROT_READ, MAP_SHARED,
self->status_fd, 0);
ASSERT_NE(MAP_FAILED, status_page);
reg.enable_bit = 31;
reg.enable_addr = (__u64)&self->check;
reg.enable_size = sizeof(self->check);
/* Register should work */
ASSERT_EQ(0, ioctl(self->data_fd, DIAG_IOCSREG, &reg));
ASSERT_EQ(0, reg.write_index);
ASSERT_NE(0, reg.status_bit);
ASSERT_EQ(0, status_check(status_page, reg.status_bit));
ASSERT_EQ(0, self->check);
/* Id should be there */
id = get_id();
@ -149,7 +136,7 @@ TEST_F(user, perf_write) {
ASSERT_NE(MAP_FAILED, perf_page);
/* Status should be updated */
ASSERT_NE(0, status_check(status_page, reg.status_bit));
ASSERT_EQ(1 << reg.enable_bit, self->check);
event.index = reg.write_index;
event.field1 = 0xc001;
@ -165,6 +152,12 @@ TEST_F(user, perf_write) {
/* Ensure correct */
ASSERT_EQ(event.field1, *val++);
ASSERT_EQ(event.field2, *val++);
munmap(perf_page, page_size * 2);
close(fd);
/* Status should be updated */
ASSERT_EQ(0, self->check);
}
int main(int argc, char **argv)