[PATCH v1 4/7] selftests/powerpc: Add read/write debugfs file, int
Benjamin Gray
bgray at linux.ibm.com
Tue Nov 22 17:57:23 AEDT 2022
Debugfs files are not always integers, so make *_file return/write a
byte buffer, and *_int deal with int values specifically. This increases
consistency with the other file read/write helpers.
---
.../testing/selftests/powerpc/include/utils.h | 6 ++--
.../selftests/powerpc/security/entry_flush.c | 12 +++----
.../selftests/powerpc/security/rfi_flush.c | 12 +++----
.../powerpc/security/uaccess_flush.c | 18 +++++-----
tools/testing/selftests/powerpc/utils.c | 34 ++++++++++++-------
5 files changed, 47 insertions(+), 35 deletions(-)
diff --git a/tools/testing/selftests/powerpc/include/utils.h b/tools/testing/selftests/powerpc/include/utils.h
index 70885e5814a8..de5e3790f397 100644
--- a/tools/testing/selftests/powerpc/include/utils.h
+++ b/tools/testing/selftests/powerpc/include/utils.h
@@ -35,8 +35,10 @@ int pick_online_cpu(void);
int read_file(const char *path, char *buf, size_t count, size_t *len);
int write_file(const char *path, const char *buf, size_t count);
-int read_debugfs_file(char *debugfs_file, int *result);
-int write_debugfs_file(char *debugfs_file, int result);
+int read_debugfs_file(const char *debugfs_file, char *buf, size_t count);
+int write_debugfs_file(const char *debugfs_file, const char *buf, size_t count);
+int read_debugfs_int(const char *debugfs_file, int *result);
+int write_debugfs_int(const char *debugfs_file, int result);
int read_sysfs_file(char *debugfs_file, char *result, size_t result_size);
int perf_event_open_counter(unsigned int type,
unsigned long config, int group_fd);
diff --git a/tools/testing/selftests/powerpc/security/entry_flush.c b/tools/testing/selftests/powerpc/security/entry_flush.c
index 68ce377b205e..e01c573deadd 100644
--- a/tools/testing/selftests/powerpc/security/entry_flush.c
+++ b/tools/testing/selftests/powerpc/security/entry_flush.c
@@ -34,18 +34,18 @@ int entry_flush_test(void)
// The PMU event we use only works on Power7 or later
SKIP_IF(!have_hwcap(PPC_FEATURE_ARCH_2_06));
- if (read_debugfs_file("powerpc/rfi_flush", &rfi_flush_orig) < 0) {
+ if (read_debugfs_int("powerpc/rfi_flush", &rfi_flush_orig) < 0) {
perror("Unable to read powerpc/rfi_flush debugfs file");
SKIP_IF(1);
}
- if (read_debugfs_file("powerpc/entry_flush", &entry_flush_orig) < 0) {
+ if (read_debugfs_int("powerpc/entry_flush", &entry_flush_orig) < 0) {
perror("Unable to read powerpc/entry_flush debugfs file");
SKIP_IF(1);
}
if (rfi_flush_orig != 0) {
- if (write_debugfs_file("powerpc/rfi_flush", 0) < 0) {
+ if (write_debugfs_int("powerpc/rfi_flush", 0) < 0) {
perror("error writing to powerpc/rfi_flush debugfs file");
FAIL_IF(1);
}
@@ -105,7 +105,7 @@ int entry_flush_test(void)
if (entry_flush == entry_flush_orig) {
entry_flush = !entry_flush_orig;
- if (write_debugfs_file("powerpc/entry_flush", entry_flush) < 0) {
+ if (write_debugfs_int("powerpc/entry_flush", entry_flush) < 0) {
perror("error writing to powerpc/entry_flush debugfs file");
return 1;
}
@@ -120,12 +120,12 @@ int entry_flush_test(void)
set_dscr(0);
- if (write_debugfs_file("powerpc/rfi_flush", rfi_flush_orig) < 0) {
+ if (write_debugfs_int("powerpc/rfi_flush", rfi_flush_orig) < 0) {
perror("unable to restore original value of powerpc/rfi_flush debugfs file");
return 1;
}
- if (write_debugfs_file("powerpc/entry_flush", entry_flush_orig) < 0) {
+ if (write_debugfs_int("powerpc/entry_flush", entry_flush_orig) < 0) {
perror("unable to restore original value of powerpc/entry_flush debugfs file");
return 1;
}
diff --git a/tools/testing/selftests/powerpc/security/rfi_flush.c b/tools/testing/selftests/powerpc/security/rfi_flush.c
index f73484a6470f..6bedc86443a6 100644
--- a/tools/testing/selftests/powerpc/security/rfi_flush.c
+++ b/tools/testing/selftests/powerpc/security/rfi_flush.c
@@ -34,18 +34,18 @@ int rfi_flush_test(void)
// The PMU event we use only works on Power7 or later
SKIP_IF(!have_hwcap(PPC_FEATURE_ARCH_2_06));
- if (read_debugfs_file("powerpc/rfi_flush", &rfi_flush_orig) < 0) {
+ if (read_debugfs_int("powerpc/rfi_flush", &rfi_flush_orig) < 0) {
perror("Unable to read powerpc/rfi_flush debugfs file");
SKIP_IF(1);
}
- if (read_debugfs_file("powerpc/entry_flush", &entry_flush_orig) < 0) {
+ if (read_debugfs_int("powerpc/entry_flush", &entry_flush_orig) < 0) {
have_entry_flush = 0;
} else {
have_entry_flush = 1;
if (entry_flush_orig != 0) {
- if (write_debugfs_file("powerpc/entry_flush", 0) < 0) {
+ if (write_debugfs_int("powerpc/entry_flush", 0) < 0) {
perror("error writing to powerpc/entry_flush debugfs file");
return 1;
}
@@ -105,7 +105,7 @@ int rfi_flush_test(void)
if (rfi_flush == rfi_flush_orig) {
rfi_flush = !rfi_flush_orig;
- if (write_debugfs_file("powerpc/rfi_flush", rfi_flush) < 0) {
+ if (write_debugfs_int("powerpc/rfi_flush", rfi_flush) < 0) {
perror("error writing to powerpc/rfi_flush debugfs file");
return 1;
}
@@ -120,13 +120,13 @@ int rfi_flush_test(void)
set_dscr(0);
- if (write_debugfs_file("powerpc/rfi_flush", rfi_flush_orig) < 0) {
+ if (write_debugfs_int("powerpc/rfi_flush", rfi_flush_orig) < 0) {
perror("unable to restore original value of powerpc/rfi_flush debugfs file");
return 1;
}
if (have_entry_flush) {
- if (write_debugfs_file("powerpc/entry_flush", entry_flush_orig) < 0) {
+ if (write_debugfs_int("powerpc/entry_flush", entry_flush_orig) < 0) {
perror("unable to restore original value of powerpc/entry_flush "
"debugfs file");
return 1;
diff --git a/tools/testing/selftests/powerpc/security/uaccess_flush.c b/tools/testing/selftests/powerpc/security/uaccess_flush.c
index cf80f960e38a..fcf23ea9b183 100644
--- a/tools/testing/selftests/powerpc/security/uaccess_flush.c
+++ b/tools/testing/selftests/powerpc/security/uaccess_flush.c
@@ -36,30 +36,30 @@ int uaccess_flush_test(void)
// The PMU event we use only works on Power7 or later
SKIP_IF(!have_hwcap(PPC_FEATURE_ARCH_2_06));
- if (read_debugfs_file("powerpc/rfi_flush", &rfi_flush_orig) < 0) {
+ if (read_debugfs_int("powerpc/rfi_flush", &rfi_flush_orig) < 0) {
perror("Unable to read powerpc/rfi_flush debugfs file");
SKIP_IF(1);
}
- if (read_debugfs_file("powerpc/entry_flush", &entry_flush_orig) < 0) {
+ if (read_debugfs_int("powerpc/entry_flush", &entry_flush_orig) < 0) {
perror("Unable to read powerpc/entry_flush debugfs file");
SKIP_IF(1);
}
- if (read_debugfs_file("powerpc/uaccess_flush", &uaccess_flush_orig) < 0) {
+ if (read_debugfs_int("powerpc/uaccess_flush", &uaccess_flush_orig) < 0) {
perror("Unable to read powerpc/entry_flush debugfs file");
SKIP_IF(1);
}
if (rfi_flush_orig != 0) {
- if (write_debugfs_file("powerpc/rfi_flush", 0) < 0) {
+ if (write_debugfs_int("powerpc/rfi_flush", 0) < 0) {
perror("error writing to powerpc/rfi_flush debugfs file");
FAIL_IF(1);
}
}
if (entry_flush_orig != 0) {
- if (write_debugfs_file("powerpc/entry_flush", 0) < 0) {
+ if (write_debugfs_int("powerpc/entry_flush", 0) < 0) {
perror("error writing to powerpc/entry_flush debugfs file");
FAIL_IF(1);
}
@@ -119,7 +119,7 @@ int uaccess_flush_test(void)
if (uaccess_flush == uaccess_flush_orig) {
uaccess_flush = !uaccess_flush_orig;
- if (write_debugfs_file("powerpc/uaccess_flush", uaccess_flush) < 0) {
+ if (write_debugfs_int("powerpc/uaccess_flush", uaccess_flush) < 0) {
perror("error writing to powerpc/uaccess_flush debugfs file");
return 1;
}
@@ -134,17 +134,17 @@ int uaccess_flush_test(void)
set_dscr(0);
- if (write_debugfs_file("powerpc/rfi_flush", rfi_flush_orig) < 0) {
+ if (write_debugfs_int("powerpc/rfi_flush", rfi_flush_orig) < 0) {
perror("unable to restore original value of powerpc/rfi_flush debugfs file");
return 1;
}
- if (write_debugfs_file("powerpc/entry_flush", entry_flush_orig) < 0) {
+ if (write_debugfs_int("powerpc/entry_flush", entry_flush_orig) < 0) {
perror("unable to restore original value of powerpc/entry_flush debugfs file");
return 1;
}
- if (write_debugfs_file("powerpc/uaccess_flush", uaccess_flush_orig) < 0) {
+ if (write_debugfs_int("powerpc/uaccess_flush", uaccess_flush_orig) < 0) {
perror("unable to restore original value of powerpc/uaccess_flush debugfs file");
return 1;
}
diff --git a/tools/testing/selftests/powerpc/utils.c b/tools/testing/selftests/powerpc/utils.c
index 7ebbaa09f69d..22a255cd43d1 100644
--- a/tools/testing/selftests/powerpc/utils.c
+++ b/tools/testing/selftests/powerpc/utils.c
@@ -95,6 +95,24 @@ int read_auxv(char *buf, ssize_t buf_size)
return 0;
}
+int read_debugfs_file(const char *subpath, char *buf, size_t count)
+{
+ char path[PATH_MAX] = "/sys/kernel/debug/";
+
+ strncat(path, subpath, sizeof(path) - strlen(path) - 1);
+
+ return read_file(path, buf, count, NULL);
+}
+
+int write_debugfs_file(const char *subpath, const char *buf, size_t count)
+{
+ char path[PATH_MAX] = "/sys/kernel/debug/";
+
+ strncat(path, subpath, sizeof(path) - strlen(path) - 1);
+
+ return write_file(path, buf, count);
+}
+
void *find_auxv_entry(int type, char *auxv)
{
ElfW(auxv_t) *p;
@@ -187,16 +205,12 @@ int read_sysfs_file(char *fpath, char *result, size_t result_size)
return read_file(path, result, result_size, NULL);
}
-int read_debugfs_file(char *debugfs_file, int *result)
+int read_debugfs_int(const char *debugfs_file, int *result)
{
int err;
- char path[PATH_MAX];
char value[16] = {0};
- strcpy(path, "/sys/kernel/debug/");
- strncat(path, debugfs_file, PATH_MAX - strlen(path) - 1);
-
- if ((err = read_file(path, value, sizeof(value) - 1, NULL)))
+ if ((err = read_debugfs_file(debugfs_file, value, sizeof(value) - 1)))
return err;
*result = atoi(value);
@@ -204,17 +218,13 @@ int read_debugfs_file(char *debugfs_file, int *result)
return 0;
}
-int write_debugfs_file(char *debugfs_file, int result)
+int write_debugfs_int(const char *debugfs_file, int result)
{
- char path[PATH_MAX];
char value[16];
- strcpy(path, "/sys/kernel/debug/");
- strncat(path, debugfs_file, PATH_MAX - strlen(path) - 1);
-
snprintf(value, 16, "%d", result);
- return write_file(path, value, strlen(value));
+ return write_debugfs_file(debugfs_file, value, strlen(value));
}
static long perf_event_open(struct perf_event_attr *hw_event, pid_t pid,
--
2.38.1
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