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Merge branch 'rename-info_cnt-to-nr_info' 

Yonghong Song says:

====================
Before func_info and line_info are added to the kernel, there are several
fields in structure bpf_prog_info specifying the "count" of a user buffer, e.g.,
        __u32 nr_jited_ksyms;
        __u32 nr_jited_func_lens;
The naming convention has the prefix "nr_".

The func_info and line_info support added several fields
        __u32 func_info_cnt;
        __u32 line_info_cnt;
        __u32 jited_line_info_cnt;
to indicate the "count" of buffers func_info, line_info and jited_line_info.
The original intention is to keep the field names the same as those in
structure bpf_attr, so it will be clear that the "count" returned to user
space will be the same as the one passed to the kernel during prog load.

Unfortunately, the field names *_info_cnt are not consistent with
other existing fields in bpf_prog_info.
This patch set renamed the fields *_info_cnt to nr_*_info
to keep naming convention consistent.
====================

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Alexei Starovoitov 2018-12-10 14:51:45 -08:00
Родитель 7a5725ddc6 cfc542411b
Коммит aa570ff4fd
6 изменённых файлов: 81 добавлений и 81 удалений
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6
include/uapi/linux/bpf.h
Просмотреть файл

@ -2696,11 +2696,11 @@ struct bpf_prog_info {
__u32 btf_id;
__u32 func_info_rec_size;
__aligned_u64 func_info;
__u32 func_info_cnt;
__u32 line_info_cnt;
__u32 nr_func_info;
__u32 nr_line_info;
__aligned_u64 line_info;
__aligned_u64 jited_line_info;
__u32 jited_line_info_cnt;
__u32 nr_jited_line_info;
__u32 line_info_rec_size;
__u32 jited_line_info_rec_size;
} __attribute__((aligned(8)));

38
kernel/bpf/syscall.c
Просмотреть файл

@ -2055,15 +2055,15 @@ static int set_info_rec_size(struct bpf_prog_info *info)
* _rec_size back to the info.
*/
if ((info->func_info_cnt || info->func_info_rec_size) &&
if ((info->nr_func_info || info->func_info_rec_size) &&
info->func_info_rec_size != sizeof(struct bpf_func_info))
return -EINVAL;
if ((info->line_info_cnt || info->line_info_rec_size) &&
if ((info->nr_line_info || info->line_info_rec_size) &&
info->line_info_rec_size != sizeof(struct bpf_line_info))
return -EINVAL;
if ((info->jited_line_info_cnt || info->jited_line_info_rec_size) &&
if ((info->nr_jited_line_info || info->jited_line_info_rec_size) &&
info->jited_line_info_rec_size != sizeof(__u64))
return -EINVAL;
@ -2125,9 +2125,9 @@ static int bpf_prog_get_info_by_fd(struct bpf_prog *prog,
info.xlated_prog_len = 0;
info.nr_jited_ksyms = 0;
info.nr_jited_func_lens = 0;
info.func_info_cnt = 0;
info.line_info_cnt = 0;
info.jited_line_info_cnt = 0;
info.nr_func_info = 0;
info.nr_line_info = 0;
info.nr_jited_line_info = 0;
goto done;
}
@ -2268,14 +2268,14 @@ static int bpf_prog_get_info_by_fd(struct bpf_prog *prog,
if (prog->aux->btf)
info.btf_id = btf_id(prog->aux->btf);
ulen = info.func_info_cnt;
info.func_info_cnt = prog->aux->func_info_cnt;
if (info.func_info_cnt && ulen) {
ulen = info.nr_func_info;
info.nr_func_info = prog->aux->func_info_cnt;
if (info.nr_func_info && ulen) {
if (bpf_dump_raw_ok()) {
char __user *user_finfo;
user_finfo = u64_to_user_ptr(info.func_info);
ulen = min_t(u32, info.func_info_cnt, ulen);
ulen = min_t(u32, info.nr_func_info, ulen);
if (copy_to_user(user_finfo, prog->aux->func_info,
info.func_info_rec_size * ulen))
return -EFAULT;
@ -2284,14 +2284,14 @@ static int bpf_prog_get_info_by_fd(struct bpf_prog *prog,
}
}
ulen = info.line_info_cnt;
info.line_info_cnt = prog->aux->nr_linfo;
if (info.line_info_cnt && ulen) {
ulen = info.nr_line_info;
info.nr_line_info = prog->aux->nr_linfo;
if (info.nr_line_info && ulen) {
if (bpf_dump_raw_ok()) {
__u8 __user *user_linfo;
user_linfo = u64_to_user_ptr(info.line_info);
ulen = min_t(u32, info.line_info_cnt, ulen);
ulen = min_t(u32, info.nr_line_info, ulen);
if (copy_to_user(user_linfo, prog->aux->linfo,
info.line_info_rec_size * ulen))
return -EFAULT;
@ -2300,18 +2300,18 @@ static int bpf_prog_get_info_by_fd(struct bpf_prog *prog,
}
}
ulen = info.jited_line_info_cnt;
ulen = info.nr_jited_line_info;
if (prog->aux->jited_linfo)
info.jited_line_info_cnt = prog->aux->nr_linfo;
info.nr_jited_line_info = prog->aux->nr_linfo;
else
info.jited_line_info_cnt = 0;
if (info.jited_line_info_cnt && ulen) {
info.nr_jited_line_info = 0;
if (info.nr_jited_line_info && ulen) {
if (bpf_dump_raw_ok()) {
__u64 __user *user_linfo;
u32 i;
user_linfo = u64_to_user_ptr(info.jited_line_info);
ulen = min_t(u32, info.jited_line_info_cnt, ulen);
ulen = min_t(u32, info.nr_jited_line_info, ulen);
for (i = 0; i < ulen; i++) {
if (put_user((__u64)(long)prog->aux->jited_linfo[i],
&user_linfo[i]))

48
tools/bpf/bpftool/prog.c
Просмотреть файл

@ -425,7 +425,7 @@ static int do_dump(int argc, char **argv)
{
unsigned int finfo_rec_size, linfo_rec_size, jited_linfo_rec_size;
void *func_info = NULL, *linfo = NULL, *jited_linfo = NULL;
unsigned int finfo_cnt, linfo_cnt = 0, jited_linfo_cnt = 0;
unsigned int nr_finfo, nr_linfo = 0, nr_jited_linfo = 0;
struct bpf_prog_linfo *prog_linfo = NULL;
unsigned long *func_ksyms = NULL;
struct bpf_prog_info info = {};
@ -537,10 +537,10 @@ static int do_dump(int argc, char **argv)
}
}
finfo_cnt = info.func_info_cnt;
nr_finfo = info.nr_func_info;
finfo_rec_size = info.func_info_rec_size;
if (finfo_cnt && finfo_rec_size) {
func_info = malloc(finfo_cnt * finfo_rec_size);
if (nr_finfo && finfo_rec_size) {
func_info = malloc(nr_finfo * finfo_rec_size);
if (!func_info) {
p_err("mem alloc failed");
close(fd);
@ -549,9 +549,9 @@ static int do_dump(int argc, char **argv)
}
linfo_rec_size = info.line_info_rec_size;
if (info.line_info_cnt && linfo_rec_size && info.btf_id) {
linfo_cnt = info.line_info_cnt;
linfo = malloc(linfo_cnt * linfo_rec_size);
if (info.nr_line_info && linfo_rec_size && info.btf_id) {
nr_linfo = info.nr_line_info;
linfo = malloc(nr_linfo * linfo_rec_size);
if (!linfo) {
p_err("mem alloc failed");
close(fd);
@ -560,13 +560,13 @@ static int do_dump(int argc, char **argv)
}
jited_linfo_rec_size = info.jited_line_info_rec_size;
if (info.jited_line_info_cnt &&
if (info.nr_jited_line_info &&
jited_linfo_rec_size &&
info.nr_jited_ksyms &&
info.nr_jited_func_lens &&
info.btf_id) {
jited_linfo_cnt = info.jited_line_info_cnt;
jited_linfo = malloc(jited_linfo_cnt * jited_linfo_rec_size);
nr_jited_linfo = info.nr_jited_line_info;
jited_linfo = malloc(nr_jited_linfo * jited_linfo_rec_size);
if (!jited_linfo) {
p_err("mem alloc failed");
close(fd);
@ -582,13 +582,13 @@ static int do_dump(int argc, char **argv)
info.nr_jited_ksyms = nr_func_ksyms;
info.jited_func_lens = ptr_to_u64(func_lens);
info.nr_jited_func_lens = nr_func_lens;
info.func_info_cnt = finfo_cnt;
info.nr_func_info = nr_finfo;
info.func_info_rec_size = finfo_rec_size;
info.func_info = ptr_to_u64(func_info);
info.line_info_cnt = linfo_cnt;
info.nr_line_info = nr_linfo;
info.line_info_rec_size = linfo_rec_size;
info.line_info = ptr_to_u64(linfo);
info.jited_line_info_cnt = jited_linfo_cnt;
info.nr_jited_line_info = nr_jited_linfo;
info.jited_line_info_rec_size = jited_linfo_rec_size;
info.jited_line_info = ptr_to_u64(jited_linfo);
@ -614,9 +614,9 @@ static int do_dump(int argc, char **argv)
goto err_free;
}
if (info.func_info_cnt != finfo_cnt) {
p_err("incorrect func_info_cnt %d vs. expected %d",
info.func_info_cnt, finfo_cnt);
if (info.nr_func_info != nr_finfo) {
p_err("incorrect nr_func_info %d vs. expected %d",
info.nr_func_info, nr_finfo);
goto err_free;
}
@ -630,12 +630,12 @@ static int do_dump(int argc, char **argv)
/* kernel.kptr_restrict is set. No func_info available. */
free(func_info);
func_info = NULL;
finfo_cnt = 0;
nr_finfo = 0;
}
if (linfo && info.line_info_cnt != linfo_cnt) {
p_err("incorrect line_info_cnt %u vs. expected %u",
info.line_info_cnt, linfo_cnt);
if (linfo && info.nr_line_info != nr_linfo) {
p_err("incorrect nr_line_info %u vs. expected %u",
info.nr_line_info, nr_linfo);
goto err_free;
}
@ -645,9 +645,9 @@ static int do_dump(int argc, char **argv)
goto err_free;
}
if (jited_linfo && info.jited_line_info_cnt != jited_linfo_cnt) {
p_err("incorrect jited_line_info_cnt %u vs. expected %u",
info.jited_line_info_cnt, jited_linfo_cnt);
if (jited_linfo && info.nr_jited_line_info != nr_jited_linfo) {
p_err("incorrect nr_jited_line_info %u vs. expected %u",
info.nr_jited_line_info, nr_jited_linfo);
goto err_free;
}
@ -670,7 +670,7 @@ static int do_dump(int argc, char **argv)
goto err_free;
}
if (linfo_cnt) {
if (nr_linfo) {
prog_linfo = bpf_prog_linfo__new(&info);
if (!prog_linfo)
p_info("error in processing bpf_line_info. continue without it.");

6
tools/include/uapi/linux/bpf.h
Просмотреть файл

@ -2695,11 +2695,11 @@ struct bpf_prog_info {
__u32 btf_id;
__u32 func_info_rec_size;
__aligned_u64 func_info;
__u32 func_info_cnt;
__u32 line_info_cnt;
__u32 nr_func_info;
__u32 nr_line_info;
__aligned_u64 line_info;
__aligned_u64 jited_line_info;
__u32 jited_line_info_cnt;
__u32 nr_jited_line_info;
__u32 line_info_rec_size;
__u32 jited_line_info_rec_size;
} __attribute__((aligned(8)));

4
tools/lib/bpf/bpf_prog_linfo.c
Просмотреть файл

@ -105,7 +105,7 @@ struct bpf_prog_linfo *bpf_prog_linfo__new(const struct bpf_prog_info *info)
struct bpf_prog_linfo *prog_linfo;
__u32 nr_linfo, nr_jited_func;
nr_linfo = info->line_info_cnt;
nr_linfo = info->nr_line_info;
/*
* Test !info->line_info because the kernel may NULL
@ -138,7 +138,7 @@ struct bpf_prog_linfo *bpf_prog_linfo__new(const struct bpf_prog_info *info)
nr_jited_func = info->nr_jited_ksyms;
if (!nr_jited_func ||
!info->jited_line_info ||
info->jited_line_info_cnt != nr_linfo ||
info->nr_jited_line_info != nr_linfo ||
info->jited_line_info_rec_size < sizeof(__u64) ||
info->nr_jited_func_lens != nr_jited_func ||
!info->jited_ksyms ||

60
tools/testing/selftests/bpf/test_btf.c
Просмотреть файл

@ -2548,9 +2548,9 @@ static int do_test_file(unsigned int test_num)
err = -1;
goto done;
}
if (CHECK(info.func_info_cnt != 3,
"incorrect info.func_info_cnt (1st) %d",
info.func_info_cnt)) {
if (CHECK(info.nr_func_info != 3,
"incorrect info.nr_func_info (1st) %d",
info.nr_func_info)) {
err = -1;
goto done;
}
@ -2561,7 +2561,7 @@ static int do_test_file(unsigned int test_num)
goto done;
}
func_info = malloc(info.func_info_cnt * rec_size);
func_info = malloc(info.nr_func_info * rec_size);
if (CHECK(!func_info, "out of memory")) {
err = -1;
goto done;
@ -2569,7 +2569,7 @@ static int do_test_file(unsigned int test_num)
/* reset info to only retrieve func_info related data */
memset(&info, 0, sizeof(info));
info.func_info_cnt = 3;
info.nr_func_info = 3;
info.func_info_rec_size = rec_size;
info.func_info = ptr_to_u64(func_info);
@ -2580,9 +2580,9 @@ static int do_test_file(unsigned int test_num)
err = -1;
goto done;
}
if (CHECK(info.func_info_cnt != 3,
"incorrect info.func_info_cnt (2nd) %d",
info.func_info_cnt)) {
if (CHECK(info.nr_func_info != 3,
"incorrect info.nr_func_info (2nd) %d",
info.nr_func_info)) {
err = -1;
goto done;
}
@ -3544,9 +3544,9 @@ static int test_get_finfo(const struct prog_info_raw_test *test,
fprintf(stderr, "%s\n", btf_log_buf);
return -1;
}
if (CHECK(info.func_info_cnt != test->func_info_cnt,
"incorrect info.func_info_cnt (1st) %d",
info.func_info_cnt)) {
if (CHECK(info.nr_func_info != test->func_info_cnt,
"incorrect info.nr_func_info (1st) %d",
info.nr_func_info)) {
return -1;
}
@ -3556,16 +3556,16 @@ static int test_get_finfo(const struct prog_info_raw_test *test,
return -1;
}
if (!info.func_info_cnt)
if (!info.nr_func_info)
return 0;
func_info = malloc(info.func_info_cnt * rec_size);
func_info = malloc(info.nr_func_info * rec_size);
if (CHECK(!func_info, "out of memory"))
return -1;
/* reset info to only retrieve func_info related data */
memset(&info, 0, sizeof(info));
info.func_info_cnt = test->func_info_cnt;
info.nr_func_info = test->func_info_cnt;
info.func_info_rec_size = rec_size;
info.func_info = ptr_to_u64(func_info);
err = bpf_obj_get_info_by_fd(prog_fd, &info, &info_len);
@ -3574,9 +3574,9 @@ static int test_get_finfo(const struct prog_info_raw_test *test,
err = -1;
goto done;
}
if (CHECK(info.func_info_cnt != test->func_info_cnt,
"incorrect info.func_info_cnt (2nd) %d",
info.func_info_cnt)) {
if (CHECK(info.nr_func_info != test->func_info_cnt,
"incorrect info.nr_func_info (2nd) %d",
info.nr_func_info)) {
err = -1;
goto done;
}
@ -3648,14 +3648,14 @@ static int test_get_linfo(const struct prog_info_raw_test *test,
nr_jited_func_lens = 1;
}
if (CHECK(info.line_info_cnt != cnt ||
info.jited_line_info_cnt != jited_cnt ||
if (CHECK(info.nr_line_info != cnt ||
info.nr_jited_line_info != jited_cnt ||
info.nr_jited_ksyms != nr_jited_ksyms ||
info.nr_jited_func_lens != nr_jited_func_lens ||
(!info.line_info_cnt && info.jited_line_info_cnt),
"info: line_info_cnt:%u(expected:%u) jited_line_info_cnt:%u(expected:%u) nr_jited_ksyms:%u(expected:%u) nr_jited_func_lens:%u(expected:%u)",
info.line_info_cnt, cnt,
info.jited_line_info_cnt, jited_cnt,
(!info.nr_line_info && info.nr_jited_line_info),
"info: nr_line_info:%u(expected:%u) nr_jited_line_info:%u(expected:%u) nr_jited_ksyms:%u(expected:%u) nr_jited_func_lens:%u(expected:%u)",
info.nr_line_info, cnt,
info.nr_jited_line_info, jited_cnt,
info.nr_jited_ksyms, nr_jited_ksyms,
info.nr_jited_func_lens, nr_jited_func_lens)) {
err = -1;
@ -3684,7 +3684,7 @@ static int test_get_linfo(const struct prog_info_raw_test *test,
err = -1;
goto done;
}
info.line_info_cnt = cnt;
info.nr_line_info = cnt;
info.line_info_rec_size = rec_size;
info.line_info = ptr_to_u64(linfo);
@ -3700,7 +3700,7 @@ static int test_get_linfo(const struct prog_info_raw_test *test,
goto done;
}
info.jited_line_info_cnt = jited_cnt;
info.nr_jited_line_info = jited_cnt;
info.jited_line_info_rec_size = jited_rec_size;
info.jited_line_info = ptr_to_u64(jited_linfo);
info.nr_jited_ksyms = nr_jited_ksyms;
@ -3717,15 +3717,15 @@ static int test_get_linfo(const struct prog_info_raw_test *test,
*/
if (CHECK(err == -1 ||
!info.line_info ||
info.line_info_cnt != cnt ||
info.nr_line_info != cnt ||
(jited_cnt && !info.jited_line_info) ||
info.jited_line_info_cnt != jited_cnt ||
info.nr_jited_line_info != jited_cnt ||
info.line_info_rec_size != rec_size ||
info.jited_line_info_rec_size != jited_rec_size,
"err:%d errno:%d info: line_info_cnt:%u(expected:%u) jited_line_info_cnt:%u(expected:%u) line_info_rec_size:%u(expected:%u) jited_linfo_rec_size:%u(expected:%u) line_info:%p jited_line_info:%p",
"err:%d errno:%d info: nr_line_info:%u(expected:%u) nr_jited_line_info:%u(expected:%u) line_info_rec_size:%u(expected:%u) jited_linfo_rec_size:%u(expected:%u) line_info:%p jited_line_info:%p",
err, errno,
info.line_info_cnt, cnt,
info.jited_line_info_cnt, jited_cnt,
info.nr_line_info, cnt,
info.nr_jited_line_info, jited_cnt,
info.line_info_rec_size, rec_size,
info.jited_line_info_rec_size, jited_rec_size,
(void *)(long)info.line_info,