* [PATCH] libbpf: Wrap libbpf API direct err with libbpf_err
@ 2025-02-14 14:17 Tao Chen
2025-02-14 14:30 ` Tao Chen
2025-02-19 2:08 ` Eduard Zingerman
0 siblings, 2 replies; 6+ messages in thread
From: Tao Chen @ 2025-02-14 14:17 UTC (permalink / raw)
To: ast, daniel, andrii, eddyz87, haoluo, jolsa, qmo
Cc: bpf, linux-kernel, chen.dylane
Just wrap the direct err with libbpf_err, keep consistency
with other APIs.
Signed-off-by: Tao Chen <chen.dylane@gmail.com>
---
tools/lib/bpf/libbpf.c | 22 +++++++++++-----------
1 file changed, 11 insertions(+), 11 deletions(-)
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index 194809da5172..6f2f3072f5a2 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -9145,12 +9145,12 @@ int bpf_object__gen_loader(struct bpf_object *obj, struct gen_loader_opts *opts)
struct bpf_gen *gen;
if (!opts)
- return -EFAULT;
+ return libbpf_err(-EFAULT);
if (!OPTS_VALID(opts, gen_loader_opts))
- return -EINVAL;
+ return libbpf_err(-EINVAL);
gen = calloc(sizeof(*gen), 1);
if (!gen)
- return -ENOMEM;
+ return libbpf_err(-ENOMEM);
gen->opts = opts;
gen->swapped_endian = !is_native_endianness(obj);
obj->gen_loader = gen;
@@ -9262,13 +9262,13 @@ int bpf_program__set_insns(struct bpf_program *prog,
struct bpf_insn *insns;
if (prog->obj->loaded)
- return -EBUSY;
+ return libbpf_err(-EBUSY);
insns = libbpf_reallocarray(prog->insns, new_insn_cnt, sizeof(*insns));
/* NULL is a valid return from reallocarray if the new count is zero */
if (!insns && new_insn_cnt) {
pr_warn("prog '%s': failed to realloc prog code\n", prog->name);
- return -ENOMEM;
+ return libbpf_err(-ENOMEM);
}
memcpy(insns, new_insns, new_insn_cnt * sizeof(*insns));
@@ -9379,11 +9379,11 @@ const char *bpf_program__log_buf(const struct bpf_program *prog, size_t *log_siz
int bpf_program__set_log_buf(struct bpf_program *prog, char *log_buf, size_t log_size)
{
if (log_size && !log_buf)
- return -EINVAL;
+ return libbpf_err(-EINVAL);
if (prog->log_size > UINT_MAX)
- return -EINVAL;
+ return libbpf_err(-EINVAL);
if (prog->obj->loaded)
- return -EBUSY;
+ return libbpf_err(-EBUSY);
prog->log_buf = log_buf;
prog->log_size = log_size;
@@ -13070,17 +13070,17 @@ int bpf_link__update_map(struct bpf_link *link, const struct bpf_map *map)
int err;
if (!bpf_map__is_struct_ops(map))
- return -EINVAL;
+ return libbpf_err(-EINVAL);
if (map->fd < 0) {
pr_warn("map '%s': can't use BPF map without FD (was it created?)\n", map->name);
- return -EINVAL;
+ return libbpf_err(-EINVAL);
}
st_ops_link = container_of(link, struct bpf_link_struct_ops, link);
/* Ensure the type of a link is correct */
if (st_ops_link->map_fd < 0)
- return -EINVAL;
+ return libbpf_err(-EINVAL);
err = bpf_map_update_elem(map->fd, &zero, map->st_ops->kern_vdata, 0);
/* It can be EBUSY if the map has been used to create or
--
2.43.0
^ permalink raw reply related [flat|nested] 6+ messages in thread* Re: [PATCH] libbpf: Wrap libbpf API direct err with libbpf_err
2025-02-14 14:17 [PATCH] libbpf: Wrap libbpf API direct err with libbpf_err Tao Chen
@ 2025-02-14 14:30 ` Tao Chen
2025-02-19 2:08 ` Eduard Zingerman
1 sibling, 0 replies; 6+ messages in thread
From: Tao Chen @ 2025-02-14 14:30 UTC (permalink / raw)
To: ast, daniel, andrii, eddyz87, haoluo, jolsa, qmo; +Cc: bpf, linux-kernel
在 2025/2/14 22:17, Tao Chen 写道:
> Just wrap the direct err with libbpf_err, keep consistency
> with other APIs.
>
> Signed-off-by: Tao Chen <chen.dylane@gmail.com>
> ---
> tools/lib/bpf/libbpf.c | 22 +++++++++++-----------
> 1 file changed, 11 insertions(+), 11 deletions(-)
>
> diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
> index 194809da5172..6f2f3072f5a2 100644
> --- a/tools/lib/bpf/libbpf.c
> +++ b/tools/lib/bpf/libbpf.c
> @@ -9145,12 +9145,12 @@ int bpf_object__gen_loader(struct bpf_object *obj, struct gen_loader_opts *opts)
> struct bpf_gen *gen;
>
> if (!opts)
> - return -EFAULT;
> + return libbpf_err(-EFAULT);
> if (!OPTS_VALID(opts, gen_loader_opts))
> - return -EINVAL;
> + return libbpf_err(-EINVAL);
> gen = calloc(sizeof(*gen), 1);
> if (!gen)
> - return -ENOMEM;
> + return libbpf_err(-ENOMEM);
> gen->opts = opts;
> gen->swapped_endian = !is_native_endianness(obj);
> obj->gen_loader = gen;
> @@ -9262,13 +9262,13 @@ int bpf_program__set_insns(struct bpf_program *prog,
> struct bpf_insn *insns;
>
> if (prog->obj->loaded)
> - return -EBUSY;
> + return libbpf_err(-EBUSY);
>
> insns = libbpf_reallocarray(prog->insns, new_insn_cnt, sizeof(*insns));
> /* NULL is a valid return from reallocarray if the new count is zero */
> if (!insns && new_insn_cnt) {
> pr_warn("prog '%s': failed to realloc prog code\n", prog->name);
> - return -ENOMEM;
> + return libbpf_err(-ENOMEM);
> }
> memcpy(insns, new_insns, new_insn_cnt * sizeof(*insns));
>
> @@ -9379,11 +9379,11 @@ const char *bpf_program__log_buf(const struct bpf_program *prog, size_t *log_siz
> int bpf_program__set_log_buf(struct bpf_program *prog, char *log_buf, size_t log_size)
> {
> if (log_size && !log_buf)
> - return -EINVAL;
> + return libbpf_err(-EINVAL);
> if (prog->log_size > UINT_MAX)
> - return -EINVAL;
> + return libbpf_err(-EINVAL);
> if (prog->obj->loaded)
> - return -EBUSY;
> + return libbpf_err(-EBUSY);
>
> prog->log_buf = log_buf;
> prog->log_size = log_size;
> @@ -13070,17 +13070,17 @@ int bpf_link__update_map(struct bpf_link *link, const struct bpf_map *map)
> int err;
>
> if (!bpf_map__is_struct_ops(map))
> - return -EINVAL;
> + return libbpf_err(-EINVAL);
>
> if (map->fd < 0) {
> pr_warn("map '%s': can't use BPF map without FD (was it created?)\n", map->name);
> - return -EINVAL;
> + return libbpf_err(-EINVAL);
> }
>
> st_ops_link = container_of(link, struct bpf_link_struct_ops, link);
> /* Ensure the type of a link is correct */
> if (st_ops_link->map_fd < 0)
> - return -EINVAL;
> + return libbpf_err(-EINVAL);
>
> err = bpf_map_update_elem(map->fd, &zero, map->st_ops->kern_vdata, 0);
> /* It can be EBUSY if the map has been used to create or
Forgive my carelessness. This patch was developed based on bpf-next. You
can ignore it. I've resent it.
--
Best Regards
Dylane Chen
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: [PATCH] libbpf: Wrap libbpf API direct err with libbpf_err
2025-02-14 14:17 [PATCH] libbpf: Wrap libbpf API direct err with libbpf_err Tao Chen
2025-02-14 14:30 ` Tao Chen
@ 2025-02-19 2:08 ` Eduard Zingerman
2025-02-19 6:23 ` Tao Chen
1 sibling, 1 reply; 6+ messages in thread
From: Eduard Zingerman @ 2025-02-19 2:08 UTC (permalink / raw)
To: Tao Chen, ast, daniel, andrii, haoluo, jolsa, qmo; +Cc: bpf, linux-kernel
On Fri, 2025-02-14 at 22:17 +0800, Tao Chen wrote:
> Just wrap the direct err with libbpf_err, keep consistency
> with other APIs.
>
> Signed-off-by: Tao Chen <chen.dylane@gmail.com>
> ---
While at it, I've noticed two more places that need libbpf_err() calls.
Could you please check the following locations:
bpf_map__set_value_size:
return -EOPNOTSUPP; tools/lib/bpf/libbpf.c:10309
return err; tools/lib/bpf/libbpf.c:10317
?
Other than that, I agree with changes in this patch.
Acked-by: Eduard Zingerman <eddyz87@gmail.com>
[...]
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH] libbpf: Wrap libbpf API direct err with libbpf_err
2025-02-19 2:08 ` Eduard Zingerman
@ 2025-02-19 6:23 ` Tao Chen
2025-02-19 6:34 ` Eduard Zingerman
0 siblings, 1 reply; 6+ messages in thread
From: Tao Chen @ 2025-02-19 6:23 UTC (permalink / raw)
To: Eduard Zingerman, ast, daniel, andrii, haoluo, jolsa, qmo
Cc: bpf, linux-kernel
在 2025/2/19 10:08, Eduard Zingerman 写道:
> On Fri, 2025-02-14 at 22:17 +0800, Tao Chen wrote:
>> Just wrap the direct err with libbpf_err, keep consistency
>> with other APIs.
>>
>> Signed-off-by: Tao Chen <chen.dylane@gmail.com>
>> ---
>
> While at it, I've noticed two more places that need libbpf_err() calls.
> Could you please check the following locations:
>
> bpf_map__set_value_size:
> return -EOPNOTSUPP; tools/lib/bpf/libbpf.c:10309
> return err; tools/lib/bpf/libbpf.c:10317
Will change it. Thanks
>
> ?
>
> Other than that, I agree with changes in this patch.
>
> Acked-by: Eduard Zingerman <eddyz87@gmail.com>
>
> [...]
>
I use a simple script, other places may also should be added:
9727 line: return NUL; (API:libbpf_bpf_attach_type_str)
9735 line: return NULL; (API: libbpf_bpf_link_type_str)
9743 line: return NULL; (API: libbpf_bpf_map_type_str)
9751 line: return NULL; (API: libbpf_bpf_prog_type_str)
10151 line: return NULL; (API: bpf_map__name)
10458 line: return NULL; (API: bpf_object__prev_map)
-----------------------------------------------
#!/bin/python3
import re
LIBBPF_PATH="tools/lib/bpf/"
def process_functions(file_path, target_functions):
"""
find return err fix
Args:
file_path: like libbpf.c btf.c etc.
target_functions: libbpf APIS
"""
with open(file_path, 'r') as file:
lines = file.readlines()
function_info = {func: {'start': None, 'end': None, 'code': []} for
func in target_functions}
in_target_function = False
current_function = None
for i, line in enumerate(lines):
# check the start line
for func in target_functions:
if re.search(re.escape(func) + r'\s*\(', line):
if ' __' in line:
continue
if '=' in line:
continue
if 'if' in line:
continue
if ';' in line:
continue
if '*' in func:
continue
in_target_function = True
current_function = func
function_info[func]['start'] = i
function_info[func]['code'].append(line)
break
# check return err in target function
if in_target_function and current_function:
function_info[current_function]['code'].append(line)
if re.search(r'\breturn\b', line):
# check return
if not re.search(r'\breturn\s+0\b', line): # return 0
ignore
if not re.search(r'libbpf_err|libbpf_ptr', line):
print(f"code should fix at {i + 1} line:
{line.strip()} (API: {current_function})")
# check function end line
if re.search(r'}', line):
function_info[current_function]['end'] = i
in_target_function = False
current_function = None # Reset for the next function
def extract_libbpf_apis(map_file):
"""
extract APIS from libbpf.map
Args:
map_file (str): libbpf.map。
Returns:
list: libbpf APIs。
"""
functions = []
inside_global_section = False
with open(map_file, 'r') as f:
for line in f:
line = line.strip()
if ';' in line and 'LIBBPF' not in line:
functions.append(line.replace(';',''))
return functions
map_file = "tools/lib/bpf/libbpf.map"
input_files = ["libbpf.c",
"btf.c",
"bpf_prog_linfo.c",
"btf_dump.c",
"btf_iter.c",
"btf_relocate.c",
"elf.c",
"features.c",
"gen_loader.c",
"hashmap.c",
"libbpf_probes.c",
"linker.c",
"netlink.c",
"nlattr.c",
"relo_core.c",
"usdt.c",
"zip.c",
"str_error.c",
"strset.c"]
target_functions = extract_libbpf_apis(map_file)
print(f"Target functions extracted: {target_functions}")
for input_file in input_files:
print(f"===========check file:{input_file}=============")
process_functions(LIBBPF_PATH + input_file, target_functions)
--
Best Regards
Dylane Chen
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: [PATCH] libbpf: Wrap libbpf API direct err with libbpf_err
2025-02-19 6:23 ` Tao Chen
@ 2025-02-19 6:34 ` Eduard Zingerman
2025-02-19 15:15 ` Tao Chen
0 siblings, 1 reply; 6+ messages in thread
From: Eduard Zingerman @ 2025-02-19 6:34 UTC (permalink / raw)
To: Tao Chen, ast, daniel, andrii, haoluo, jolsa, qmo; +Cc: bpf, linux-kernel
On Wed, 2025-02-19 at 14:23 +0800, Tao Chen wrote:
> 在 2025/2/19 10:08, Eduard Zingerman 写道:
> > On Fri, 2025-02-14 at 22:17 +0800, Tao Chen wrote:
> > > Just wrap the direct err with libbpf_err, keep consistency
> > > with other APIs.
> > >
> > > Signed-off-by: Tao Chen <chen.dylane@gmail.com>
> > > ---
> >
> > While at it, I've noticed two more places that need libbpf_err() calls.
> > Could you please check the following locations:
> >
> > bpf_map__set_value_size:
> > return -EOPNOTSUPP; tools/lib/bpf/libbpf.c:10309
> > return err; tools/lib/bpf/libbpf.c:10317
>
> Will change it. Thanks
>
> >
> > ?
> >
> > Other than that, I agree with changes in this patch.
> >
> > Acked-by: Eduard Zingerman <eddyz87@gmail.com>
> >
> > [...]
> >
>
> I use a simple script, other places may also should be added:
Yeah, makes sense :)
>
> 9727 line: return NUL; (API:libbpf_bpf_attach_type_str)
> 9735 line: return NULL; (API: libbpf_bpf_link_type_str)
> 9743 line: return NULL; (API: libbpf_bpf_map_type_str)
> 9751 line: return NULL; (API: libbpf_bpf_prog_type_str)
> 10151 line: return NULL; (API: bpf_map__name)
Sort of makes sense for these.
Idk, I'm fine with and without changes to these functions.
> 10458 line: return NULL; (API: bpf_object__prev_map)
This is not an error, I think.
[...]
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH] libbpf: Wrap libbpf API direct err with libbpf_err
2025-02-19 6:34 ` Eduard Zingerman
@ 2025-02-19 15:15 ` Tao Chen
0 siblings, 0 replies; 6+ messages in thread
From: Tao Chen @ 2025-02-19 15:15 UTC (permalink / raw)
To: Eduard Zingerman, ast, daniel, andrii, haoluo, jolsa, qmo
Cc: bpf, linux-kernel
在 2025/2/19 14:34, Eduard Zingerman 写道:
> On Wed, 2025-02-19 at 14:23 +0800, Tao Chen wrote:
>> 在 2025/2/19 10:08, Eduard Zingerman 写道:
>>> On Fri, 2025-02-14 at 22:17 +0800, Tao Chen wrote:
>>>> Just wrap the direct err with libbpf_err, keep consistency
>>>> with other APIs.
>>>>
>>>> Signed-off-by: Tao Chen <chen.dylane@gmail.com>
>>>> ---
>>>
>>> While at it, I've noticed two more places that need libbpf_err() calls.
>>> Could you please check the following locations:
>>>
>>> bpf_map__set_value_size:
>>> return -EOPNOTSUPP; tools/lib/bpf/libbpf.c:10309
>>> return err; tools/lib/bpf/libbpf.c:10317
>>
>> Will change it. Thanks
>>
>>>
>>> ?
>>>
>>> Other than that, I agree with changes in this patch.
>>>
>>> Acked-by: Eduard Zingerman <eddyz87@gmail.com>
>>>
>>> [...]
>>>
>>
>> I use a simple script, other places may also should be added:
>
> Yeah, makes sense :)
>
>>
>> 9727 line: return NUL; (API:libbpf_bpf_attach_type_str)
>> 9735 line: return NULL; (API: libbpf_bpf_link_type_str)
>> 9743 line: return NULL; (API: libbpf_bpf_map_type_str)
>> 9751 line: return NULL; (API: libbpf_bpf_prog_type_str)
>> 10151 line: return NULL; (API: bpf_map__name)
>
> Sort of makes sense for these.
> Idk, I'm fine with and without changes to these functions.
>
Well，then I'll still keep these and won't make any modifications.
>> 10458 line: return NULL; (API: bpf_object__prev_map)
>
> This is not an error, I think.
>
> [...]
>
--
Best Regards
Tao Chen
^ permalink raw reply [flat|nested] 6+ messages in thread
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2025-02-14 14:17 [PATCH] libbpf: Wrap libbpf API direct err with libbpf_err Tao Chen
2025-02-14 14:30 ` Tao Chen
2025-02-19 2:08 ` Eduard Zingerman
2025-02-19 6:23 ` Tao Chen
2025-02-19 6:34 ` Eduard Zingerman
2025-02-19 15:15 ` Tao Chen
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