Commit abc8a952 authored by Rong Tao's avatar Rong Tao Committed by Alexei Starovoitov
Browse files

selftests/bpf: Test kfunc bpf_strcasecmp 



Add testsuites for kfunc bpf_strcasecmp.

Signed-off-by: default avatarRong Tao <rongtao@cestc.cn>
Link: https://lore.kernel.org/r/tencent_81A1A0ACC04B68158C57C4D151C46A832B07@qq.com


Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
parent 19559e84

tools/testing/selftests/bpf/prog_tests/string_kfuncs.c

+1 −0
Original line number Diff line number Diff line
@@ -8,6 +8,7 @@ 


static const char * const test_cases[] = {

	"strcmp",

	"strcasecmp",

	"strchr",

	"strchrnul",

	"strnchr",

tools/testing/selftests/bpf/progs/string_kfuncs_failure1.c

+6 −0
Original line number Diff line number Diff line
@@ -31,6 +31,8 @@ char *invalid_kern_ptr = (char *)-1; 
/* Passing NULL to string kfuncs (treated as a userspace ptr) */

SEC("syscall") __retval(USER_PTR_ERR) int test_strcmp_null1(void *ctx) { return bpf_strcmp(NULL, "hello"); }

SEC("syscall")  __retval(USER_PTR_ERR)int test_strcmp_null2(void *ctx) { return bpf_strcmp("hello", NULL); }

SEC("syscall") __retval(USER_PTR_ERR) int test_strcasecmp_null1(void *ctx) { return bpf_strcasecmp(NULL, "HELLO"); }

SEC("syscall")  __retval(USER_PTR_ERR)int test_strcasecmp_null2(void *ctx) { return bpf_strcasecmp("HELLO", NULL); }

SEC("syscall")  __retval(USER_PTR_ERR)int test_strchr_null(void *ctx) { return bpf_strchr(NULL, 'a'); }

SEC("syscall")  __retval(USER_PTR_ERR)int test_strchrnul_null(void *ctx) { return bpf_strchrnul(NULL, 'a'); }

SEC("syscall")  __retval(USER_PTR_ERR)int test_strnchr_null(void *ctx) { return bpf_strnchr(NULL, 1, 'a'); }
@@ -49,6 +51,8 @@ SEC("syscall") __retval(USER_PTR_ERR)int test_strnstr_null2(void *ctx) { return 
/* Passing userspace ptr to string kfuncs */

SEC("syscall") __retval(USER_PTR_ERR) int test_strcmp_user_ptr1(void *ctx) { return bpf_strcmp(user_ptr, "hello"); }

SEC("syscall") __retval(USER_PTR_ERR) int test_strcmp_user_ptr2(void *ctx) { return bpf_strcmp("hello", user_ptr); }

SEC("syscall") __retval(USER_PTR_ERR) int test_strcasecmp_user_ptr1(void *ctx) { return bpf_strcasecmp(user_ptr, "HELLO"); }

SEC("syscall") __retval(USER_PTR_ERR) int test_strcasecmp_user_ptr2(void *ctx) { return bpf_strcasecmp("HELLO", user_ptr); }

SEC("syscall") __retval(USER_PTR_ERR) int test_strchr_user_ptr(void *ctx) { return bpf_strchr(user_ptr, 'a'); }

SEC("syscall") __retval(USER_PTR_ERR) int test_strchrnul_user_ptr(void *ctx) { return bpf_strchrnul(user_ptr, 'a'); }

SEC("syscall") __retval(USER_PTR_ERR) int test_strnchr_user_ptr(void *ctx) { return bpf_strnchr(user_ptr, 1, 'a'); }
@@ -69,6 +73,8 @@ SEC("syscall") __retval(USER_PTR_ERR) int test_strnstr_user_ptr2(void *ctx) { re 
/* Passing invalid kernel ptr to string kfuncs should always return -EFAULT */

SEC("syscall") __retval(-EFAULT) int test_strcmp_pagefault1(void *ctx) { return bpf_strcmp(invalid_kern_ptr, "hello"); }

SEC("syscall") __retval(-EFAULT) int test_strcmp_pagefault2(void *ctx) { return bpf_strcmp("hello", invalid_kern_ptr); }

SEC("syscall") __retval(-EFAULT) int test_strcasecmp_pagefault1(void *ctx) { return bpf_strcasecmp(invalid_kern_ptr, "HELLO"); }

SEC("syscall") __retval(-EFAULT) int test_strcasecmp_pagefault2(void *ctx) { return bpf_strcasecmp("HELLO", invalid_kern_ptr); }

SEC("syscall") __retval(-EFAULT) int test_strchr_pagefault(void *ctx) { return bpf_strchr(invalid_kern_ptr, 'a'); }

SEC("syscall") __retval(-EFAULT) int test_strchrnul_pagefault(void *ctx) { return bpf_strchrnul(invalid_kern_ptr, 'a'); }

SEC("syscall") __retval(-EFAULT) int test_strnchr_pagefault(void *ctx) { return bpf_strnchr(invalid_kern_ptr, 1, 'a'); }

tools/testing/selftests/bpf/progs/string_kfuncs_failure2.c

+1 −0
Original line number Diff line number Diff line
@@ -7,6 +7,7 @@ 
char long_str[XATTR_SIZE_MAX + 1];



SEC("syscall") int test_strcmp_too_long(void *ctx) { return bpf_strcmp(long_str, long_str); }

SEC("syscall") int test_strcasecmp_too_long(void *ctx) { return bpf_strcasecmp(long_str, long_str); }

SEC("syscall") int test_strchr_too_long(void *ctx) { return bpf_strchr(long_str, 'b'); }

SEC("syscall") int test_strchrnul_too_long(void *ctx) { return bpf_strchrnul(long_str, 'b'); }

SEC("syscall") int test_strnchr_too_long(void *ctx) { return bpf_strnchr(long_str, sizeof(long_str), 'b'); }

tools/testing/selftests/bpf/progs/string_kfuncs_success.c

+5 −0
Original line number Diff line number Diff line
@@ -12,6 +12,11 @@ char str[] = "hello world"; 
/* Functional tests */

__test(0) int test_strcmp_eq(void *ctx) { return bpf_strcmp(str, "hello world"); }

__test(1) int test_strcmp_neq(void *ctx) { return bpf_strcmp(str, "hello"); }

__test(0) int test_strcasecmp_eq1(void *ctx) { return bpf_strcasecmp(str, "hello world"); }

__test(0) int test_strcasecmp_eq2(void *ctx) { return bpf_strcasecmp(str, "HELLO WORLD"); }

__test(0) int test_strcasecmp_eq3(void *ctx) { return bpf_strcasecmp(str, "HELLO world"); }

__test(1) int test_strcasecmp_neq1(void *ctx) { return bpf_strcasecmp(str, "hello"); }

__test(1) int test_strcasecmp_neq2(void *ctx) { return bpf_strcasecmp(str, "HELLO"); }

__test(1) int test_strchr_found(void *ctx) { return bpf_strchr(str, 'e'); }

__test(11) int test_strchr_null(void *ctx) { return bpf_strchr(str, '\0'); }

__test(-ENOENT) int test_strchr_notfound(void *ctx) { return bpf_strchr(str, 'x'); }