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Diffstat (limited to 'tools/lib/bpf/libbpf.c')
-rw-r--r--tools/lib/bpf/libbpf.c961
1 files changed, 635 insertions, 326 deletions
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index e2a3cf437814..48c0ade05ab1 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -54,6 +54,7 @@
#include "str_error.h"
#include "libbpf_internal.h"
#include "hashmap.h"
+#include "bpf_gen_internal.h"
#ifndef BPF_FS_MAGIC
#define BPF_FS_MAGIC 0xcafe4a11
@@ -150,6 +151,23 @@ static inline __u64 ptr_to_u64(const void *ptr)
return (__u64) (unsigned long) ptr;
}
+/* this goes away in libbpf 1.0 */
+enum libbpf_strict_mode libbpf_mode = LIBBPF_STRICT_NONE;
+
+int libbpf_set_strict_mode(enum libbpf_strict_mode mode)
+{
+ /* __LIBBPF_STRICT_LAST is the last power-of-2 value used + 1, so to
+ * get all possible values we compensate last +1, and then (2*x - 1)
+ * to get the bit mask
+ */
+ if (mode != LIBBPF_STRICT_ALL
+ && (mode & ~((__LIBBPF_STRICT_LAST - 1) * 2 - 1)))
+ return errno = EINVAL, -EINVAL;
+
+ libbpf_mode = mode;
+ return 0;
+}
+
enum kern_feature_id {
/* v4.14: kernel support for program & map names. */
FEAT_PROG_NAME,
@@ -178,7 +196,7 @@ enum kern_feature_id {
__FEAT_CNT,
};
-static bool kernel_supports(enum kern_feature_id feat_id);
+static bool kernel_supports(const struct bpf_object *obj, enum kern_feature_id feat_id);
enum reloc_type {
RELO_LD64,
@@ -432,6 +450,8 @@ struct bpf_object {
bool loaded;
bool has_subcalls;
+ struct bpf_gen *gen_loader;
+
/*
* Information when doing elf related work. Only valid if fd
* is valid.
@@ -677,6 +697,11 @@ bpf_object__add_programs(struct bpf_object *obj, Elf_Data *sec_data,
return -LIBBPF_ERRNO__FORMAT;
}
+ if (sec_idx != obj->efile.text_shndx && GELF_ST_BIND(sym.st_info) == STB_LOCAL) {
+ pr_warn("sec '%s': program '%s' is static and not supported\n", sec_name, name);
+ return -ENOTSUP;
+ }
+
pr_debug("sec '%s': found program '%s' at insn offset %zu (%zu bytes), code size %zu insns (%zu bytes)\n",
sec_name, name, sec_off / BPF_INSN_SZ, sec_off, prog_sz / BPF_INSN_SZ, prog_sz);
@@ -700,13 +725,14 @@ bpf_object__add_programs(struct bpf_object *obj, Elf_Data *sec_data,
if (err)
return err;
- /* if function is a global/weak symbol, but has hidden
- * visibility (STV_HIDDEN), mark its BTF FUNC as static to
- * enable more permissive BPF verification mode with more
- * outside context available to BPF verifier
+ /* if function is a global/weak symbol, but has restricted
+ * (STV_HIDDEN or STV_INTERNAL) visibility, mark its BTF FUNC
+ * as static to enable more permissive BPF verification mode
+ * with more outside context available to BPF verifier
*/
if (GELF_ST_BIND(sym.st_info) != STB_LOCAL
- && GELF_ST_VISIBILITY(sym.st_other) == STV_HIDDEN)
+ && (GELF_ST_VISIBILITY(sym.st_other) == STV_HIDDEN
+ || GELF_ST_VISIBILITY(sym.st_other) == STV_INTERNAL))
prog->mark_btf_static = true;
nr_progs++;
@@ -1794,7 +1820,6 @@ static int bpf_object__init_user_maps(struct bpf_object *obj, bool strict)
if (!symbols)
return -EINVAL;
-
scn = elf_sec_by_idx(obj, obj->efile.maps_shndx);
data = elf_sec_data(obj, scn);
if (!scn || !data) {
@@ -1854,6 +1879,12 @@ static int bpf_object__init_user_maps(struct bpf_object *obj, bool strict)
return -LIBBPF_ERRNO__FORMAT;
}
+ if (GELF_ST_TYPE(sym.st_info) == STT_SECTION
+ || GELF_ST_BIND(sym.st_info) == STB_LOCAL) {
+ pr_warn("map '%s' (legacy): static maps are not supported\n", map_name);
+ return -ENOTSUP;
+ }
+
map->libbpf_type = LIBBPF_MAP_UNSPEC;
map->sec_idx = sym.st_shndx;
map->sec_offset = sym.st_value;
@@ -2261,6 +2292,16 @@ static void fill_map_from_def(struct bpf_map *map, const struct btf_map_def *def
pr_debug("map '%s': found inner map definition.\n", map->name);
}
+static const char *btf_var_linkage_str(__u32 linkage)
+{
+ switch (linkage) {
+ case BTF_VAR_STATIC: return "static";
+ case BTF_VAR_GLOBAL_ALLOCATED: return "global";
+ case BTF_VAR_GLOBAL_EXTERN: return "extern";
+ default: return "unknown";
+ }
+}
+
static int bpf_object__init_user_btf_map(struct bpf_object *obj,
const struct btf_type *sec,
int var_idx, int sec_idx,
@@ -2293,10 +2334,9 @@ static int bpf_object__init_user_btf_map(struct bpf_object *obj,
map_name, btf_kind_str(var));
return -EINVAL;
}
- if (var_extra->linkage != BTF_VAR_GLOBAL_ALLOCATED &&
- var_extra->linkage != BTF_VAR_STATIC) {
- pr_warn("map '%s': unsupported var linkage %u.\n",
- map_name, var_extra->linkage);
+ if (var_extra->linkage != BTF_VAR_GLOBAL_ALLOCATED) {
+ pr_warn("map '%s': unsupported map linkage %s.\n",
+ map_name, btf_var_linkage_str(var_extra->linkage));
return -EOPNOTSUPP;
}
@@ -2425,10 +2465,8 @@ static int bpf_object__init_maps(struct bpf_object *obj,
err = err ?: bpf_object__init_global_data_maps(obj);
err = err ?: bpf_object__init_kconfig_map(obj);
err = err ?: bpf_object__init_struct_ops_maps(obj);
- if (err)
- return err;
- return 0;
+ return err;
}
static bool section_have_execinstr(struct bpf_object *obj, int idx)
@@ -2443,20 +2481,20 @@ static bool section_have_execinstr(struct bpf_object *obj, int idx)
static bool btf_needs_sanitization(struct bpf_object *obj)
{
- bool has_func_global = kernel_supports(FEAT_BTF_GLOBAL_FUNC);
- bool has_datasec = kernel_supports(FEAT_BTF_DATASEC);
- bool has_float = kernel_supports(FEAT_BTF_FLOAT);
- bool has_func = kernel_supports(FEAT_BTF_FUNC);
+ bool has_func_global = kernel_supports(obj, FEAT_BTF_GLOBAL_FUNC);
+ bool has_datasec = kernel_supports(obj, FEAT_BTF_DATASEC);
+ bool has_float = kernel_supports(obj, FEAT_BTF_FLOAT);
+ bool has_func = kernel_supports(obj, FEAT_BTF_FUNC);
return !has_func || !has_datasec || !has_func_global || !has_float;
}
static void bpf_object__sanitize_btf(struct bpf_object *obj, struct btf *btf)
{
- bool has_func_global = kernel_supports(FEAT_BTF_GLOBAL_FUNC);
- bool has_datasec = kernel_supports(FEAT_BTF_DATASEC);
- bool has_float = kernel_supports(FEAT_BTF_FLOAT);
- bool has_func = kernel_supports(FEAT_BTF_FUNC);
+ bool has_func_global = kernel_supports(obj, FEAT_BTF_GLOBAL_FUNC);
+ bool has_datasec = kernel_supports(obj, FEAT_BTF_DATASEC);
+ bool has_float = kernel_supports(obj, FEAT_BTF_FLOAT);
+ bool has_func = kernel_supports(obj, FEAT_BTF_FUNC);
struct btf_type *t;
int i, j, vlen;
@@ -2539,16 +2577,14 @@ static int bpf_object__init_btf(struct bpf_object *obj,
if (btf_data) {
obj->btf = btf__new(btf_data->d_buf, btf_data->d_size);
- if (IS_ERR(obj->btf)) {
- err = PTR_ERR(obj->btf);
+ err = libbpf_get_error(obj->btf);
+ if (err) {
obj->btf = NULL;
- pr_warn("Error loading ELF section %s: %d.\n",
- BTF_ELF_SEC, err);
+ pr_warn("Error loading ELF section %s: %d.\n", BTF_ELF_SEC, err);
goto out;
}
/* enforce 8-byte pointers for BPF-targeted BTFs */
btf__set_pointer_size(obj->btf, 8);
- err = 0;
}
if (btf_ext_data) {
if (!obj->btf) {
@@ -2556,11 +2592,11 @@ static int bpf_object__init_btf(struct bpf_object *obj,
BTF_EXT_ELF_SEC, BTF_ELF_SEC);
goto out;
}
- obj->btf_ext = btf_ext__new(btf_ext_data->d_buf,
- btf_ext_data->d_size);
- if (IS_ERR(obj->btf_ext)) {
- pr_warn("Error loading ELF section %s: %ld. Ignored and continue.\n",
- BTF_EXT_ELF_SEC, PTR_ERR(obj->btf_ext));
+ obj->btf_ext = btf_ext__new(btf_ext_data->d_buf, btf_ext_data->d_size);
+ err = libbpf_get_error(obj->btf_ext);
+ if (err) {
+ pr_warn("Error loading ELF section %s: %d. Ignored and continue.\n",
+ BTF_EXT_ELF_SEC, err);
obj->btf_ext = NULL;
goto out;
}
@@ -2637,15 +2673,15 @@ static int bpf_object__load_vmlinux_btf(struct bpf_object *obj, bool force)
int err;
/* btf_vmlinux could be loaded earlier */
- if (obj->btf_vmlinux)
+ if (obj->btf_vmlinux || obj->gen_loader)
return 0;
if (!force && !obj_needs_vmlinux_btf(obj))
return 0;
obj->btf_vmlinux = libbpf_find_kernel_btf();
- if (IS_ERR(obj->btf_vmlinux)) {
- err = PTR_ERR(obj->btf_vmlinux);
+ err = libbpf_get_error(obj->btf_vmlinux);
+ if (err) {
pr_warn("Error loading vmlinux BTF: %d\n", err);
obj->btf_vmlinux = NULL;
return err;
@@ -2662,7 +2698,7 @@ static int bpf_object__sanitize_and_load_btf(struct bpf_object *obj)
if (!obj->btf)
return 0;
- if (!kernel_supports(FEAT_BTF)) {
+ if (!kernel_supports(obj, FEAT_BTF)) {
if (kernel_needs_btf(obj)) {
err = -EOPNOTSUPP;
goto report;
@@ -2711,15 +2747,29 @@ static int bpf_object__sanitize_and_load_btf(struct bpf_object *obj)
/* clone BTF to sanitize a copy and leave the original intact */
raw_data = btf__get_raw_data(obj->btf, &sz);
kern_btf = btf__new(raw_data, sz);
- if (IS_ERR(kern_btf))
- return PTR_ERR(kern_btf);
+ err = libbpf_get_error(kern_btf);
+ if (err)
+ return err;
/* enforce 8-byte pointers for BPF-targeted BTFs */
btf__set_pointer_size(obj->btf, 8);
bpf_object__sanitize_btf(obj, kern_btf);
}
- err = btf__load(kern_btf);
+ if (obj->gen_loader) {
+ __u32 raw_size = 0;
+ const void *raw_data = btf__get_raw_data(kern_btf, &raw_size);
+
+ if (!raw_data)
+ return -ENOMEM;
+ bpf_gen__load_btf(obj->gen_loader, raw_data, raw_size);
+ /* Pretend to have valid FD to pass various fd >= 0 checks.
+ * This fd == 0 will not be used with any syscall and will be reset to -1 eventually.
+ */
+ btf__set_fd(kern_btf, 0);
+ } else {
+ err = btf__load(kern_btf);
+ }
if (sanitize) {
if (!err) {
/* move fd to libbpf's BTF */
@@ -3216,6 +3266,9 @@ static int add_dummy_ksym_var(struct btf *btf)
const struct btf_var_secinfo *vs;
const struct btf_type *sec;
+ if (!btf)
+ return 0;
+
sec_btf_id = btf__find_by_name_kind(btf, KSYMS_SEC,
BTF_KIND_DATASEC);
if (sec_btf_id < 0)
@@ -3470,7 +3523,7 @@ bpf_object__find_program_by_title(const struct bpf_object *obj,
if (pos->sec_name && !strcmp(pos->sec_name, title))
return pos;
}
- return NULL;
+ return errno = ENOENT, NULL;
}
static bool prog_is_subprog(const struct bpf_object *obj,
@@ -3503,7 +3556,7 @@ bpf_object__find_program_by_name(const struct bpf_object *obj,
if (!strcmp(prog->name, name))
return prog;
}
- return NULL;
+ return errno = ENOENT, NULL;
}
static bool bpf_object__shndx_is_data(const struct bpf_object *obj,
@@ -3850,11 +3903,11 @@ int bpf_map__reuse_fd(struct bpf_map *map, int fd)
err = bpf_obj_get_info_by_fd(fd, &info, &len);
if (err)
- return err;
+ return libbpf_err(err);
new_name = strdup(info.name);
if (!new_name)
- return -errno;
+ return libbpf_err(-errno);
new_fd = open("/", O_RDONLY | O_CLOEXEC);
if (new_fd < 0) {
@@ -3892,7 +3945,7 @@ err_close_new_fd:
close(new_fd);
err_free_new_name:
free(new_name);
- return err;
+ return libbpf_err(err);
}
__u32 bpf_map__max_entries(const struct bpf_map *map)
@@ -3903,7 +3956,7 @@ __u32 bpf_map__max_entries(const struct bpf_map *map)
struct bpf_map *bpf_map__inner_map(struct bpf_map *map)
{
if (!bpf_map_type__is_map_in_map(map->def.type))
- return NULL;
+ return errno = EINVAL, NULL;
return map->inner_map;
}
@@ -3911,7 +3964,7 @@ struct bpf_map *bpf_map__inner_map(struct bpf_map *map)
int bpf_map__set_max_entries(struct bpf_map *map, __u32 max_entries)
{
if (map->fd >= 0)
- return -EBUSY;
+ return libbpf_err(-EBUSY);
map->def.max_entries = max_entries;
return 0;
}
@@ -3919,7 +3972,7 @@ int bpf_map__set_max_entries(struct bpf_map *map, __u32 max_entries)
int bpf_map__resize(struct bpf_map *map, __u32 max_entries)
{
if (!map || !max_entries)
- return -EINVAL;
+ return libbpf_err(-EINVAL);
return bpf_map__set_max_entries(map, max_entries);
}
@@ -3935,6 +3988,9 @@ bpf_object__probe_loading(struct bpf_object *obj)
};
int ret;
+ if (obj->gen_loader)
+ return 0;
+
/* make sure basic loading works */
memset(&attr, 0, sizeof(attr));
@@ -4290,11 +4346,17 @@ static struct kern_feature_desc {
},
};
-static bool kernel_supports(enum kern_feature_id feat_id)
+static bool kernel_supports(const struct bpf_object *obj, enum kern_feature_id feat_id)
{
struct kern_feature_desc *feat = &feature_probes[feat_id];
int ret;
+ if (obj->gen_loader)
+ /* To generate loader program assume the latest kernel
+ * to avoid doing extra prog_load, map_create syscalls.
+ */
+ return true;
+
if (READ_ONCE(feat->res) == FEAT_UNKNOWN) {
ret = feat->probe();
if (ret > 0) {
@@ -4377,6 +4439,13 @@ bpf_object__populate_internal_map(struct bpf_object *obj, struct bpf_map *map)
char *cp, errmsg[STRERR_BUFSIZE];
int err, zero = 0;
+ if (obj->gen_loader) {
+ bpf_gen__map_update_elem(obj->gen_loader, map - obj->maps,
+ map->mmaped, map->def.value_size);
+ if (map_type == LIBBPF_MAP_RODATA || map_type == LIBBPF_MAP_KCONFIG)
+ bpf_gen__map_freeze(obj->gen_loader, map - obj->maps);
+ return 0;
+ }
err = bpf_map_update_elem(map->fd, &zero, map->mmaped, 0);
if (err) {
err = -errno;
@@ -4402,14 +4471,14 @@ bpf_object__populate_internal_map(struct bpf_object *obj, struct bpf_map *map)
static void bpf_map__destroy(struct bpf_map *map);
-static int bpf_object__create_map(struct bpf_object *obj, struct bpf_map *map)
+static int bpf_object__create_map(struct bpf_object *obj, struct bpf_map *map, bool is_inner)
{
struct bpf_create_map_attr create_attr;
struct bpf_map_def *def = &map->def;
memset(&create_attr, 0, sizeof(create_attr));
- if (kernel_supports(FEAT_PROG_NAME))
+ if (kernel_supports(obj, FEAT_PROG_NAME))
create_attr.name = map->name;
create_attr.map_ifindex = map->map_ifindex;
create_attr.map_type = def->type;
@@ -4450,7 +4519,7 @@ static int bpf_object__create_map(struct bpf_object *obj, struct bpf_map *map)
if (map->inner_map) {
int err;
- err = bpf_object__create_map(obj, map->inner_map);
+ err = bpf_object__create_map(obj, map->inner_map, true);
if (err) {
pr_warn("map '%s': failed to create inner map: %d\n",
map->name, err);
@@ -4462,7 +4531,15 @@ static int bpf_object__create_map(struct bpf_object *obj, struct bpf_map *map)
create_attr.inner_map_fd = map->inner_map_fd;
}
- map->fd = bpf_create_map_xattr(&create_attr);
+ if (obj->gen_loader) {
+ bpf_gen__map_create(obj->gen_loader, &create_attr, is_inner ? -1 : map - obj->maps);
+ /* Pretend to have valid FD to pass various fd >= 0 checks.
+ * This fd == 0 will not be used with any syscall and will be reset to -1 eventually.
+ */
+ map->fd = 0;
+ } else {
+ map->fd = bpf_create_map_xattr(&create_attr);
+ }
if (map->fd < 0 && (create_attr.btf_key_type_id ||
create_attr.btf_value_type_id)) {
char *cp, errmsg[STRERR_BUFSIZE];
@@ -4483,6 +4560,8 @@ static int bpf_object__create_map(struct bpf_object *obj, struct bpf_map *map)
return -errno;
if (bpf_map_type__is_map_in_map(def->type) && map->inner_map) {
+ if (obj->gen_loader)
+ map->inner_map->fd = -1;
bpf_map__destroy(map->inner_map);
zfree(&map->inner_map);
}
@@ -4490,11 +4569,11 @@ static int bpf_object__create_map(struct bpf_object *obj, struct bpf_map *map)
return 0;
}
-static int init_map_slots(struct bpf_map *map)
+static int init_map_slots(struct bpf_object *obj, struct bpf_map *map)
{
const struct bpf_map *targ_map;
unsigned int i;
- int fd, err;
+ int fd, err = 0;
for (i = 0; i < map->init_slots_sz; i++) {
if (!map->init_slots[i])
@@ -4502,7 +4581,13 @@ static int init_map_slots(struct bpf_map *map)
targ_map = map->init_slots[i];
fd = bpf_map__fd(targ_map);
- err = bpf_map_update_elem(map->fd, &i, &fd, 0);
+ if (obj->gen_loader) {
+ pr_warn("// TODO map_update_elem: idx %td key %d value==map_idx %td\n",
+ map - obj->maps, i, targ_map - obj->maps);
+ return -ENOTSUP;
+ } else {
+ err = bpf_map_update_elem(map->fd, &i, &fd, 0);
+ }
if (err) {
err = -errno;
pr_warn("map '%s': failed to initialize slot [%d] to map '%s' fd=%d: %d\n",
@@ -4544,7 +4629,7 @@ bpf_object__create_maps(struct bpf_object *obj)
pr_debug("map '%s': skipping creation (preset fd=%d)\n",
map->name, map->fd);
} else {
- err = bpf_object__create_map(obj, map);
+ err = bpf_object__create_map(obj, map, false);
if (err)
goto err_out;
@@ -4560,7 +4645,7 @@ bpf_object__create_maps(struct bpf_object *obj)
}
if (map->init_slots_sz) {
- err = init_map_slots(map);
+ err = init_map_slots(obj, map);
if (err < 0) {
zclose(map->fd);
goto err_out;
@@ -4970,11 +5055,14 @@ static int load_module_btfs(struct bpf_object *obj)
if (obj->btf_modules_loaded)
return 0;
+ if (obj->gen_loader)
+ return 0;
+
/* don't do this again, even if we find no module BTFs */
obj->btf_modules_loaded = true;
/* kernel too old to support module BTFs */
- if (!kernel_supports(FEAT_MODULE_BTF))
+ if (!kernel_supports(obj, FEAT_MODULE_BTF))
return 0;
while (true) {
@@ -5015,10 +5103,10 @@ static int load_module_btfs(struct bpf_object *obj)
}
btf = btf_get_from_fd(fd, obj->btf_vmlinux);
- if (IS_ERR(btf)) {
- pr_warn("failed to load module [%s]'s BTF object #%d: %ld\n",
- name, id, PTR_ERR(btf));
- err = PTR_ERR(btf);
+ err = libbpf_get_error(btf);
+ if (err) {
+ pr_warn("failed to load module [%s]'s BTF object #%d: %d\n",
+ name, id, err);
goto err_out;
}
@@ -6117,6 +6205,12 @@ static int bpf_core_apply_relo(struct bpf_program *prog,
if (str_is_empty(spec_str))
return -EINVAL;
+ if (prog->obj->gen_loader) {
+ pr_warn("// TODO core_relo: prog %td insn[%d] %s %s kind %d\n",
+ prog - prog->obj->programs, relo->insn_off / 8,
+ local_name, spec_str, relo->kind);
+ return -ENOTSUP;
+ }
err = bpf_core_parse_spec(local_btf, local_id, spec_str, relo->kind, &local_spec);
if (err) {
pr_warn("prog '%s': relo #%d: parsing [%d] %s %s + %s failed: %d\n",
@@ -6272,8 +6366,8 @@ bpf_object__relocate_core(struct bpf_object *obj, const char *targ_btf_path)
if (targ_btf_path) {
obj->btf_vmlinux_override = btf__parse(targ_btf_path, NULL);
- if (IS_ERR_OR_NULL(obj->btf_vmlinux_override)) {
- err = PTR_ERR(obj->btf_vmlinux_override);
+ err = libbpf_get_error(obj->btf_vmlinux_override);
+ if (err) {
pr_warn("failed to parse target BTF: %d\n", err);
return err;
}
@@ -6368,19 +6462,34 @@ bpf_object__relocate_data(struct bpf_object *obj, struct bpf_program *prog)
switch (relo->type) {
case RELO_LD64:
- insn[0].src_reg = BPF_PSEUDO_MAP_FD;
- insn[0].imm = obj->maps[relo->map_idx].fd;
+ if (obj->gen_loader) {
+ insn[0].src_reg = BPF_PSEUDO_MAP_IDX;
+ insn[0].imm = relo->map_idx;
+ } else {
+ insn[0].src_reg = BPF_PSEUDO_MAP_FD;
+ insn[0].imm = obj->maps[relo->map_idx].fd;
+ }
break;
case RELO_DATA:
- insn[0].src_reg = BPF_PSEUDO_MAP_VALUE;
insn[1].imm = insn[0].imm + relo->sym_off;
- insn[0].imm = obj->maps[relo->map_idx].fd;
+ if (obj->gen_loader) {
+ insn[0].src_reg = BPF_PSEUDO_MAP_IDX_VALUE;
+ insn[0].imm = relo->map_idx;
+ } else {
+ insn[0].src_reg = BPF_PSEUDO_MAP_VALUE;
+ insn[0].imm = obj->maps[relo->map_idx].fd;
+ }
break;
case RELO_EXTERN_VAR:
ext = &obj->externs[relo->sym_off];
if (ext->type == EXT_KCFG) {
- insn[0].src_reg = BPF_PSEUDO_MAP_VALUE;
- insn[0].imm = obj->maps[obj->kconfig_map_idx].fd;
+ if (obj->gen_loader) {
+ insn[0].src_reg = BPF_PSEUDO_MAP_IDX_VALUE;
+ insn[0].imm = obj->kconfig_map_idx;
+ } else {
+ insn[0].src_reg = BPF_PSEUDO_MAP_VALUE;
+ insn[0].imm = obj->maps[obj->kconfig_map_idx].fd;
+ }
insn[1].imm = ext->kcfg.data_off;
} else /* EXT_KSYM */ {
if (ext->ksym.type_id) { /* typed ksyms */
@@ -6399,11 +6508,15 @@ bpf_object__relocate_data(struct bpf_object *obj, struct bpf_program *prog)
insn[0].imm = ext->ksym.kernel_btf_id;
break;
case RELO_SUBPROG_ADDR:
- insn[0].src_reg = BPF_PSEUDO_FUNC;
- /* will be handled as a follow up pass */
+ if (insn[0].src_reg != BPF_PSEUDO_FUNC) {
+ pr_warn("prog '%s': relo #%d: bad insn\n",
+ prog->name, i);
+ return -EINVAL;
+ }
+ /* handled already */
break;
case RELO_CALL:
- /* will be handled as a follow up pass */
+ /* handled already */
break;
default:
pr_warn("prog '%s': relo #%d: bad relo type %d\n",
@@ -6494,7 +6607,7 @@ reloc_prog_func_and_line_info(const struct bpf_object *obj,
/* no .BTF.ext relocation if .BTF.ext is missing or kernel doesn't
* supprot func/line info
*/
- if (!obj->btf_ext || !kernel_supports(FEAT_BTF_FUNC))
+ if (!obj->btf_ext || !kernel_supports(obj, FEAT_BTF_FUNC))
return 0;
/* only attempt func info relocation if main program's func_info
@@ -6572,6 +6685,30 @@ static struct reloc_desc *find_prog_insn_relo(const struct bpf_program *prog, si
sizeof(*prog->reloc_desc), cmp_relo_by_insn_idx);
}
+static int append_subprog_relos(struct bpf_program *main_prog, struct bpf_program *subprog)
+{
+ int new_cnt = main_prog->nr_reloc + subprog->nr_reloc;
+ struct reloc_desc *relos;
+ int i;
+
+ if (main_prog == subprog)
+ return 0;
+ relos = libbpf_reallocarray(main_prog->reloc_desc, new_cnt, sizeof(*relos));
+ if (!relos)
+ return -ENOMEM;
+ memcpy(relos + main_prog->nr_reloc, subprog->reloc_desc,
+ sizeof(*relos) * subprog->nr_reloc);
+
+ for (i = main_prog->nr_reloc; i < new_cnt; i++)
+ relos[i].insn_idx += subprog->sub_insn_off;
+ /* After insn_idx adjustment the 'relos' array is still sorted
+ * by insn_idx and doesn't break bsearch.
+ */
+ main_prog->reloc_desc = relos;
+ main_prog->nr_reloc = new_cnt;
+ return 0;
+}
+
static int
bpf_object__reloc_code(struct bpf_object *obj, struct bpf_program *main_prog,
struct bpf_program *prog)
@@ -6592,6 +6729,11 @@ bpf_object__reloc_code(struct bpf_object *obj, struct bpf_program *main_prog,
continue;
relo = find_prog_insn_relo(prog, insn_idx);
+ if (relo && relo->type == RELO_EXTERN_FUNC)
+ /* kfunc relocations will be handled later
+ * in bpf_object__relocate_data()
+ */
+ continue;
if (relo && relo->type != RELO_CALL && relo->type != RELO_SUBPROG_ADDR) {
pr_warn("prog '%s': unexpected relo for insn #%zu, type %d\n",
prog->name, insn_idx, relo->type);
@@ -6666,6 +6808,10 @@ bpf_object__reloc_code(struct bpf_object *obj, struct bpf_program *main_prog,
pr_debug("prog '%s': added %zu insns from sub-prog '%s'\n",
main_prog->name, subprog->insns_cnt, subprog->name);
+ /* The subprog insns are now appended. Append its relos too. */
+ err = append_subprog_relos(main_prog, subprog);
+ if (err)
+ return err;
err = bpf_object__reloc_code(obj, main_prog, subprog);
if (err)
return err;
@@ -6795,11 +6941,25 @@ bpf_object__relocate_calls(struct bpf_object *obj, struct bpf_program *prog)
return 0;
}
+static void
+bpf_object__free_relocs(struct bpf_object *obj)
+{
+ struct bpf_program *prog;
+ int i;
+
+ /* free up relocation descriptors */
+ for (i = 0; i < obj->nr_programs; i++) {
+ prog = &obj->programs[i];
+ zfree(&prog->reloc_desc);
+ prog->nr_reloc = 0;
+ }
+}
+
static int
bpf_object__relocate(struct bpf_object *obj, const char *targ_btf_path)
{
struct bpf_program *prog;
- size_t i;
+ size_t i, j;
int err;
if (obj->btf_ext) {
@@ -6810,23 +6970,32 @@ bpf_object__relocate(struct bpf_object *obj, const char *targ_btf_path)
return err;
}
}
- /* relocate data references first for all programs and sub-programs,
- * as they don't change relative to code locations, so subsequent
- * subprogram processing won't need to re-calculate any of them
+
+ /* Before relocating calls pre-process relocations and mark
+ * few ld_imm64 instructions that points to subprogs.
+ * Otherwise bpf_object__reloc_code() later would have to consider
+ * all ld_imm64 insns as relocation candidates. That would
+ * reduce relocation speed, since amount of find_prog_insn_relo()
+ * would increase and most of them will fail to find a relo.
*/
for (i = 0; i < obj->nr_programs; i++) {
prog = &obj->programs[i];
- err = bpf_object__relocate_data(obj, prog);
- if (err) {
- pr_warn("prog '%s': failed to relocate data references: %d\n",
- prog->name, err);
- return err;
+ for (j = 0; j < prog->nr_reloc; j++) {
+ struct reloc_desc *relo = &prog->reloc_desc[j];
+ struct bpf_insn *insn = &prog->insns[relo->insn_idx];
+
+ /* mark the insn, so it's recognized by insn_is_pseudo_func() */
+ if (relo->type == RELO_SUBPROG_ADDR)
+ insn[0].src_reg = BPF_PSEUDO_FUNC;
}
}
- /* now relocate subprogram calls and append used subprograms to main
+
+ /* relocate subprogram calls and append used subprograms to main
* programs; each copy of subprogram code needs to be relocated
* differently for each main program, because its code location might
- * have changed
+ * have changed.
+ * Append subprog relos to main programs to allow data relos to be
+ * processed after text is completely relocated.
*/
for (i = 0; i < obj->nr_programs; i++) {
prog = &obj->programs[i];
@@ -6843,12 +7012,20 @@ bpf_object__relocate(struct bpf_object *obj, const char *targ_btf_path)
return err;
}
}
- /* free up relocation descriptors */
+ /* Process data relos for main programs */
for (i = 0; i < obj->nr_programs; i++) {
prog = &obj->programs[i];
- zfree(&prog->reloc_desc);
- prog->nr_reloc = 0;
+ if (prog_is_subprog(obj, prog))
+ continue;
+ err = bpf_object__relocate_data(obj, prog);
+ if (err) {
+ pr_warn("prog '%s': failed to relocate data references: %d\n",
+ prog->name, err);
+ return err;
+ }
}
+ if (!obj->gen_loader)
+ bpf_object__free_relocs(obj);
return 0;
}
@@ -7037,6 +7214,9 @@ static int bpf_object__sanitize_prog(struct bpf_object *obj, struct bpf_program
enum bpf_func_id func_id;
int i;
+ if (obj->gen_loader)
+ return 0;
+
for (i = 0; i < prog->insns_cnt; i++, insn++) {
if (!insn_is_helper_call(insn, &func_id))
continue;
@@ -7048,12 +7228,12 @@ static int bpf_object__sanitize_prog(struct bpf_object *obj, struct bpf_program
switch (func_id) {
case BPF_FUNC_probe_read_kernel:
case BPF_FUNC_probe_read_user:
- if (!kernel_supports(FEAT_PROBE_READ_KERN))
+ if (!kernel_supports(obj, FEAT_PROBE_READ_KERN))
insn->imm = BPF_FUNC_probe_read;
break;
case BPF_FUNC_probe_read_kernel_str:
case BPF_FUNC_probe_read_user_str:
- if (!kernel_supports(FEAT_PROBE_READ_KERN))
+ if (!kernel_supports(obj, FEAT_PROBE_READ_KERN))
insn->imm = BPF_FUNC_probe_read_str;
break;
default:
@@ -7088,12 +7268,12 @@ load_program(struct bpf_program *prog, struct bpf_insn *insns, int insns_cnt,
load_attr.prog_type = prog->type;
/* old kernels might not support specifying expected_attach_type */
- if (!kernel_supports(FEAT_EXP_ATTACH_TYPE) && prog->sec_def &&
+ if (!kernel_supports(prog->obj, FEAT_EXP_ATTACH_TYPE) && prog->sec_def &&
prog->sec_def->is_exp_attach_type_optional)
load_attr.expected_attach_type = 0;
else
load_attr.expected_attach_type = prog->expected_attach_type;
- if (kernel_supports(FEAT_PROG_NAME))
+ if (kernel_supports(prog->obj, FEAT_PROG_NAME))
load_attr.name = prog->name;
load_attr.insns = insns;
load_attr.insn_cnt = insns_cnt;
@@ -7109,7 +7289,7 @@ load_program(struct bpf_program *prog, struct bpf_insn *insns, int insns_cnt,
/* specify func_info/line_info only if kernel supports them */
btf_fd = bpf_object__btf_fd(prog->obj);
- if (btf_fd >= 0 && kernel_supports(FEAT_BTF_FUNC)) {
+ if (btf_fd >= 0 && kernel_supports(prog->obj, FEAT_BTF_FUNC)) {
load_attr.prog_btf_fd = btf_fd;
load_attr.func_info = prog->func_info;
load_attr.func_info_rec_size = prog->func_info_rec_size;
@@ -7121,6 +7301,12 @@ load_program(struct bpf_program *prog, struct bpf_insn *insns, int insns_cnt,
load_attr.log_level = prog->log_level;
load_attr.prog_flags = prog->prog_flags;
+ if (prog->obj->gen_loader) {
+ bpf_gen__prog_load(prog->obj->gen_loader, &load_attr,
+ prog - prog->obj->programs);
+ *pfd = -1;
+ return 0;
+ }
retry_load:
if (log_buf_size) {
log_buf = malloc(log_buf_size);
@@ -7139,7 +7325,7 @@ retry_load:
pr_debug("verifier log:\n%s", log_buf);
if (prog->obj->rodata_map_idx >= 0 &&
- kernel_supports(FEAT_PROG_BIND_MAP)) {
+ kernel_supports(prog->obj, FEAT_PROG_BIND_MAP)) {
struct bpf_map *rodata_map =
&prog->obj->maps[prog->obj->rodata_map_idx];
@@ -7198,6 +7384,38 @@ out:
return ret;
}
+static int bpf_program__record_externs(struct bpf_program *prog)
+{
+ struct bpf_object *obj = prog->obj;
+ int i;
+
+ for (i = 0; i < prog->nr_reloc; i++) {
+ struct reloc_desc *relo = &prog->reloc_desc[i];
+ struct extern_desc *ext = &obj->externs[relo->sym_off];
+
+ switch (relo->type) {
+ case RELO_EXTERN_VAR:
+ if (ext->type != EXT_KSYM)
+ continue;
+ if (!ext->ksym.type_id) {
+ pr_warn("typeless ksym %s is not supported yet\n",
+ ext->name);
+ return -ENOTSUP;
+ }
+ bpf_gen__record_extern(obj->gen_loader, ext->name, BTF_KIND_VAR,
+ relo->insn_idx);
+ break;
+ case RELO_EXTERN_FUNC:
+ bpf_gen__record_extern(obj->gen_loader, ext->name, BTF_KIND_FUNC,
+ relo->insn_idx);
+ break;
+ default:
+ continue;
+ }
+ }
+ return 0;
+}
+
static int libbpf_find_attach_btf_id(struct bpf_program *prog, int *btf_obj_fd, int *btf_type_id);
int bpf_program__load(struct bpf_program *prog, char *license, __u32 kern_ver)
@@ -7206,7 +7424,7 @@ int bpf_program__load(struct bpf_program *prog, char *license, __u32 kern_ver)
if (prog->obj->loaded) {
pr_warn("prog '%s': can't load after object was loaded\n", prog->name);
- return -EINVAL;
+ return libbpf_err(-EINVAL);
}
if ((prog->type == BPF_PROG_TYPE_TRACING ||
@@ -7216,7 +7434,7 @@ int bpf_program__load(struct bpf_program *prog, char *license, __u32 kern_ver)
err = libbpf_find_attach_btf_id(prog, &btf_obj_fd, &btf_type_id);
if (err)
- return err;
+ return libbpf_err(err);
prog->attach_btf_obj_fd = btf_obj_fd;
prog->attach_btf_id = btf_type_id;
@@ -7226,13 +7444,13 @@ int bpf_program__load(struct bpf_program *prog, char *license, __u32 kern_ver)
if (prog->preprocessor) {
pr_warn("Internal error: can't load program '%s'\n",
prog->name);
- return -LIBBPF_ERRNO__INTERNAL;
+ return libbpf_err(-LIBBPF_ERRNO__INTERNAL);
}
prog->instances.fds = malloc(sizeof(int));
if (!prog->instances.fds) {
pr_warn("Not enough memory for BPF fds\n");
- return -ENOMEM;
+ return libbpf_err(-ENOMEM);
}
prog->instances.nr = 1;
prog->instances.fds[0] = -1;
@@ -7243,6 +7461,8 @@ int bpf_program__load(struct bpf_program *prog, char *license, __u32 kern_ver)
pr_warn("prog '%s': inconsistent nr(%d) != 1\n",
prog->name, prog->instances.nr);
}
+ if (prog->obj->gen_loader)
+ bpf_program__record_externs(prog);
err = load_program(prog, prog->insns, prog->insns_cnt,
license, kern_ver, &fd);
if (!err)
@@ -7289,7 +7509,7 @@ out:
pr_warn("failed to load program '%s'\n", prog->name);
zfree(&prog->insns);
prog->insns_cnt = 0;
- return err;
+ return libbpf_err(err);
}
static int
@@ -7319,6 +7539,8 @@ bpf_object__load_progs(struct bpf_object *obj, int log_level)
if (err)
return err;
}
+ if (obj->gen_loader)
+ bpf_object__free_relocs(obj);
return 0;
}
@@ -7420,7 +7642,7 @@ __bpf_object__open_xattr(struct bpf_object_open_attr *attr, int flags)
struct bpf_object *bpf_object__open_xattr(struct bpf_object_open_attr *attr)
{
- return __bpf_object__open_xattr(attr, 0);
+ return libbpf_ptr(__bpf_object__open_xattr(attr, 0));
}
struct bpf_object *bpf_object__open(const char *path)
@@ -7430,18 +7652,18 @@ struct bpf_object *bpf_object__open(const char *path)
.prog_type = BPF_PROG_TYPE_UNSPEC,
};
- return bpf_object__open_xattr(&attr);
+ return libbpf_ptr(__bpf_object__open_xattr(&attr, 0));
}
struct bpf_object *
bpf_object__open_file(const char *path, const struct bpf_object_open_opts *opts)
{
if (!path)
- return ERR_PTR(-EINVAL);
+ return libbpf_err_ptr(-EINVAL);
pr_debug("loading %s\n", path);
- return __bpf_object__open(path, NULL, 0, opts);
+ return libbpf_ptr(__bpf_object__open(path, NULL, 0, opts));
}
struct bpf_object *
@@ -7449,9 +7671,9 @@ bpf_object__open_mem(const void *obj_buf, size_t obj_buf_sz,
const struct bpf_object_open_opts *opts)
{
if (!obj_buf || obj_buf_sz == 0)
- return ERR_PTR(-EINVAL);
+ return libbpf_err_ptr(-EINVAL);
- return __bpf_object__open(NULL, obj_buf, obj_buf_sz, opts);
+ return libbpf_ptr(__bpf_object__open(NULL, obj_buf, obj_buf_sz, opts));
}
struct bpf_object *
@@ -7466,9 +7688,9 @@ bpf_object__open_buffer(const void *obj_buf, size_t obj_buf_sz,
/* returning NULL is wrong, but backwards-compatible */
if (!obj_buf || obj_buf_sz == 0)
- return NULL;
+ return errno = EINVAL, NULL;
- return bpf_object__open_mem(obj_buf, obj_buf_sz, &opts);
+ return libbpf_ptr(__bpf_object__open(NULL, obj_buf, obj_buf_sz, &opts));
}
int bpf_object__unload(struct bpf_object *obj)
@@ -7476,7 +7698,7 @@ int bpf_object__unload(struct bpf_object *obj)
size_t i;
if (!obj)
- return -EINVAL;
+ return libbpf_err(-EINVAL);
for (i = 0; i < obj->nr_maps; i++) {
zclose(obj->maps[i].fd);
@@ -7497,11 +7719,11 @@ static int bpf_object__sanitize_maps(struct bpf_object *obj)
bpf_object__for_each_map(m, obj) {
if (!bpf_map__is_internal(m))
continue;
- if (!kernel_supports(FEAT_GLOBAL_DATA)) {
+ if (!kernel_supports(obj, FEAT_GLOBAL_DATA)) {
pr_warn("kernel doesn't support global data\n");
return -ENOTSUP;
}
- if (!kernel_supports(FEAT_ARRAY_MMAP))
+ if (!kernel_supports(obj, FEAT_ARRAY_MMAP))
m->def.map_flags ^= BPF_F_MMAPABLE;
}
@@ -7699,6 +7921,12 @@ static int bpf_object__resolve_ksyms_btf_id(struct bpf_object *obj)
if (ext->type != EXT_KSYM || !ext->ksym.type_id)
continue;
+ if (obj->gen_loader) {
+ ext->is_set = true;
+ ext->ksym.kernel_btf_obj_fd = 0;
+ ext->ksym.kernel_btf_id = 0;
+ continue;
+ }
t = btf__type_by_id(obj->btf, ext->btf_id);
if (btf_is_var(t))
err = bpf_object__resolve_ksym_var_btf_id(obj, ext);
@@ -7803,16 +8031,19 @@ int bpf_object__load_xattr(struct bpf_object_load_attr *attr)
int err, i;
if (!attr)
- return -EINVAL;
+ return libbpf_err(-EINVAL);
obj = attr->obj;
if (!obj)
- return -EINVAL;
+ return libbpf_err(-EINVAL);
if (obj->loaded) {
pr_warn("object '%s': load can't be attempted twice\n", obj->name);
- return -EINVAL;
+ return libbpf_err(-EINVAL);
}
+ if (obj->gen_loader)
+ bpf_gen__init(obj->gen_loader, attr->log_level);
+
err = bpf_object__probe_loading(obj);
err = err ? : bpf_object__load_vmlinux_btf(obj, false);
err = err ? : bpf_object__resolve_externs(obj, obj->kconfig);
@@ -7823,6 +8054,15 @@ int bpf_object__load_xattr(struct bpf_object_load_attr *attr)
err = err ? : bpf_object__relocate(obj, attr->target_btf_path);
err = err ? : bpf_object__load_progs(obj, attr->log_level);
+ if (obj->gen_loader) {
+ /* reset FDs */
+ btf__set_fd(obj->btf, -1);
+ for (i = 0; i < obj->nr_maps; i++)
+ obj->maps[i].fd = -1;
+ if (!err)
+ err = bpf_gen__finish(obj->gen_loader);
+ }
+
/* clean up module BTFs */
for (i = 0; i < obj->btf_module_cnt; i++) {
close(obj->btf_modules[i].fd);
@@ -7849,7 +8089,7 @@ out:
bpf_object__unload(obj);
pr_warn("failed to load object '%s'\n", obj->path);
- return err;
+ return libbpf_err(err);
}
int bpf_object__load(struct bpf_object *obj)
@@ -7921,28 +8161,28 @@ int bpf_program__pin_instance(struct bpf_program *prog, const char *path,
err = make_parent_dir(path);
if (err)
- return err;
+ return libbpf_err(err);
err = check_path(path);
if (err)
- return err;
+ return libbpf_err(err);
if (prog == NULL) {
pr_warn("invalid program pointer\n");
- return -EINVAL;
+ return libbpf_err(-EINVAL);
}
if (instance < 0 || instance >= prog->instances.nr) {
pr_warn("invalid prog instance %d of prog %s (max %d)\n",
instance, prog->name, prog->instances.nr);
- return -EINVAL;
+ return libbpf_err(-EINVAL);
}
if (bpf_obj_pin(prog->instances.fds[instance], path)) {
err = -errno;
cp = libbpf_strerror_r(err, errmsg, sizeof(errmsg));
pr_warn("failed to pin program: %s\n", cp);
- return err;
+ return libbpf_err(err);
}
pr_debug("pinned program '%s'\n", path);
@@ -7956,22 +8196,23 @@ int bpf_program__unpin_instance(struct bpf_program *prog, const char *path,
err = check_path(path);
if (err)
- return err;
+ return libbpf_err(err);
if (prog == NULL) {
pr_warn("invalid program pointer\n");
- return -EINVAL;
+ return libbpf_err(-EINVAL);
}
if (instance < 0 || instance >= prog->instances.nr) {
pr_warn("invalid prog instance %d of prog %s (max %d)\n",
instance, prog->name, prog->instances.nr);
- return -EINVAL;
+ return libbpf_err(-EINVAL);
}
err = unlink(path);
if (err != 0)
- return -errno;
+ return libbpf_err(-errno);
+
pr_debug("unpinned program '%s'\n", path);
return 0;
@@ -7983,20 +8224,20 @@ int bpf_program__pin(struct bpf_program *prog, const char *path)
err = make_parent_dir(path);
if (err)
- return err;
+ return libbpf_err(err);
err = check_path(path);
if (err)
- return err;
+ return libbpf_err(err);
if (prog == NULL) {
pr_warn("invalid program pointer\n");
- return -EINVAL;
+ return libbpf_err(-EINVAL);
}
if (prog->instances.nr <= 0) {
pr_warn("no instances of prog %s to pin\n", prog->name);
- return -EINVAL;
+ return libbpf_err(-EINVAL);
}
if (prog->instances.nr == 1) {
@@ -8040,7 +8281,7 @@ err_unpin:
rmdir(path);
- return err;
+ return libbpf_err(err);
}
int bpf_program__unpin(struct bpf_program *prog, const char *path)
@@ -8049,16 +8290,16 @@ int bpf_program__unpin(struct bpf_program *prog, const char *path)
err = check_path(path);
if (err)
- return err;
+ return libbpf_err(err);
if (prog == NULL) {
pr_warn("invalid program pointer\n");
- return -EINVAL;
+ return libbpf_err(-EINVAL);
}
if (prog->instances.nr <= 0) {
pr_warn("no instances of prog %s to pin\n", prog->name);
- return -EINVAL;
+ return libbpf_err(-EINVAL);
}
if (prog->instances.nr == 1) {
@@ -8072,9 +8313,9 @@ int bpf_program__unpin(struct bpf_program *prog, const char *path)
len = snprintf(buf, PATH_MAX, "%s/%d", path, i);
if (len < 0)
- return -EINVAL;
+ return libbpf_err(-EINVAL);
else if (len >= PATH_MAX)
- return -ENAMETOOLONG;
+ return libbpf_err(-ENAMETOOLONG);
err = bpf_program__unpin_instance(prog, buf, i);
if (err)
@@ -8083,7 +8324,7 @@ int bpf_program__unpin(struct bpf_program *prog, const char *path)
err = rmdir(path);
if (err)
- return -errno;
+ return libbpf_err(-errno);
return 0;
}
@@ -8095,14 +8336,14 @@ int bpf_map__pin(struct bpf_map *map, const char *path)
if (map == NULL) {
pr_warn("invalid map pointer\n");
- return -EINVAL;
+ return libbpf_err(-EINVAL);
}
if (map->pin_path) {
if (path && strcmp(path, map->pin_path)) {
pr_warn("map '%s' already has pin path '%s' different from '%s'\n",
bpf_map__name(map), map->pin_path, path);
- return -EINVAL;
+ return libbpf_err(-EINVAL);
} else if (map->pinned) {
pr_debug("map '%s' already pinned at '%s'; not re-pinning\n",
bpf_map__name(map), map->pin_path);
@@ -8112,10 +8353,10 @@ int bpf_map__pin(struct bpf_map *map, const char *path)
if (!path) {
pr_warn("missing a path to pin map '%s' at\n",
bpf_map__name(map));
- return -EINVAL;
+ return libbpf_err(-EINVAL);
} else if (map->pinned) {
pr_warn("map '%s' already pinned\n", bpf_map__name(map));
- return -EEXIST;
+ return libbpf_err(-EEXIST);
}
map->pin_path = strdup(path);
@@ -8127,11 +8368,11 @@ int bpf_map__pin(struct bpf_map *map, const char *path)
err = make_parent_dir(map->pin_path);
if (err)
- return err;
+ return libbpf_err(err);
err = check_path(map->pin_path);
if (err)
- return err;
+ return libbpf_err(err);
if (bpf_obj_pin(map->fd, map->pin_path)) {
err = -errno;
@@ -8146,7 +8387,7 @@ int bpf_map__pin(struct bpf_map *map, const char *path)
out_err:
cp = libbpf_strerror_r(-err, errmsg, sizeof(errmsg));
pr_warn("failed to pin map: %s\n", cp);
- return err;
+ return libbpf_err(err);
}
int bpf_map__unpin(struct bpf_map *map, const char *path)
@@ -8155,29 +8396,29 @@ int bpf_map__unpin(struct bpf_map *map, const char *path)
if (map == NULL) {
pr_warn("invalid map pointer\n");
- return -EINVAL;
+ return libbpf_err(-EINVAL);
}
if (map->pin_path) {
if (path && strcmp(path, map->pin_path)) {
pr_warn("map '%s' already has pin path '%s' different from '%s'\n",
bpf_map__name(map), map->pin_path, path);
- return -EINVAL;
+ return libbpf_err(-EINVAL);
}
path = map->pin_path;
} else if (!path) {
pr_warn("no path to unpin map '%s' from\n",
bpf_map__name(map));
- return -EINVAL;
+ return libbpf_err(-EINVAL);
}
err = check_path(path);
if (err)
- return err;
+ return libbpf_err(err);
err = unlink(path);
if (err != 0)
- return -errno;
+ return libbpf_err(-errno);
map->pinned = false;
pr_debug("unpinned map '%s' from '%s'\n", bpf_map__name(map), path);
@@ -8192,7 +8433,7 @@ int bpf_map__set_pin_path(struct bpf_map *map, const char *path)
if (path) {
new = strdup(path);
if (!new)
- return -errno;
+ return libbpf_err(-errno);
}
free(map->pin_path);
@@ -8226,11 +8467,11 @@ int bpf_object__pin_maps(struct bpf_object *obj, const char *path)
int err;
if (!obj)
- return -ENOENT;
+ return libbpf_err(-ENOENT);
if (!obj->loaded) {
pr_warn("object not yet loaded; load it first\n");
- return -ENOENT;
+ return libbpf_err(-ENOENT);
}
bpf_object__for_each_map(map, obj) {
@@ -8270,7 +8511,7 @@ err_unpin_maps:
bpf_map__unpin(map, NULL);
}
- return err;
+ return libbpf_err(err);
}
int bpf_object__unpin_maps(struct bpf_object *obj, const char *path)
@@ -8279,7 +8520,7 @@ int bpf_object__unpin_maps(struct bpf_object *obj, const char *path)
int err;
if (!obj)
- return -ENOENT;
+ return libbpf_err(-ENOENT);
bpf_object__for_each_map(map, obj) {
char *pin_path = NULL;
@@ -8291,9 +8532,9 @@ int bpf_object__unpin_maps(struct bpf_object *obj, const char *path)
len = snprintf(buf, PATH_MAX, "%s/%s", path,
bpf_map__name(map));
if (len < 0)
- return -EINVAL;
+ return libbpf_err(-EINVAL);
else if (len >= PATH_MAX)
- return -ENAMETOOLONG;
+ return libbpf_err(-ENAMETOOLONG);
sanitize_pin_path(buf);
pin_path = buf;
} else if (!map->pin_path) {
@@ -8302,7 +8543,7 @@ int bpf_object__unpin_maps(struct bpf_object *obj, const char *path)
err = bpf_map__unpin(map, pin_path);
if (err)
- return err;
+ return libbpf_err(err);
}
return 0;
@@ -8314,11 +8555,11 @@ int bpf_object__pin_programs(struct bpf_object *obj, const char *path)
int err;
if (!obj)
- return -ENOENT;
+ return libbpf_err(-ENOENT);
if (!obj->loaded) {
pr_warn("object not yet loaded; load it first\n");
- return -ENOENT;
+ return libbpf_err(-ENOENT);
}
bpf_object__for_each_program(prog, obj) {
@@ -8357,7 +8598,7 @@ err_unpin_programs:
bpf_program__unpin(prog, buf);
}
- return err;
+ return libbpf_err(err);
}
int bpf_object__unpin_programs(struct bpf_object *obj, const char *path)
@@ -8366,7 +8607,7 @@ int bpf_object__unpin_programs(struct bpf_object *obj, const char *path)
int err;
if (!obj)
- return -ENOENT;
+ return libbpf_err(-ENOENT);
bpf_object__for_each_program(prog, obj) {
char buf[PATH_MAX];
@@ -8375,13 +8616,13 @@ int bpf_object__unpin_programs(struct bpf_object *obj, const char *path)
len = snprintf(buf, PATH_MAX, "%s/%s", path,
prog->pin_name);
if (len < 0)
- return -EINVAL;
+ return libbpf_err(-EINVAL);
else if (len >= PATH_MAX)
- return -ENAMETOOLONG;
+ return libbpf_err(-ENAMETOOLONG);
err = bpf_program__unpin(prog, buf);
if (err)
- return err;
+ return libbpf_err(err);
}
return 0;
@@ -8393,12 +8634,12 @@ int bpf_object__pin(struct bpf_object *obj, const char *path)
err = bpf_object__pin_maps(obj, path);
if (err)
- return err;
+ return libbpf_err(err);
err = bpf_object__pin_programs(obj, path);
if (err) {
bpf_object__unpin_maps(obj, path);
- return err;
+ return libbpf_err(err);
}
return 0;
@@ -8448,6 +8689,7 @@ void bpf_object__close(struct bpf_object *obj)
if (obj->clear_priv)
obj->clear_priv(obj, obj->priv);
+ bpf_gen__free(obj->gen_loader);
bpf_object__elf_finish(obj);
bpf_object__unload(obj);
btf__free(obj->btf);
@@ -8494,7 +8736,7 @@ bpf_object__next(struct bpf_object *prev)
const char *bpf_object__name(const struct bpf_object *obj)
{
- return obj ? obj->name : ERR_PTR(-EINVAL);
+ return obj ? obj->name : libbpf_err_ptr(-EINVAL);
}
unsigned int bpf_object__kversion(const struct bpf_object *obj)
@@ -8515,7 +8757,7 @@ int bpf_object__btf_fd(const struct bpf_object *obj)
int bpf_object__set_kversion(struct bpf_object *obj, __u32 kern_version)
{
if (obj->loaded)
- return -EINVAL;
+ return libbpf_err(-EINVAL);
obj->kern_version = kern_version;
@@ -8535,7 +8777,23 @@ int bpf_object__set_priv(struct bpf_object *obj, void *priv,
void *bpf_object__priv(const struct bpf_object *obj)
{
- return obj ? obj->priv : ERR_PTR(-EINVAL);
+ return obj ? obj->priv : libbpf_err_ptr(-EINVAL);
+}
+
+int bpf_object__gen_loader(struct bpf_object *obj, struct gen_loader_opts *opts)
+{
+ struct bpf_gen *gen;
+
+ if (!opts)
+ return -EFAULT;
+ if (!OPTS_VALID(opts, gen_loader_opts))
+ return -EINVAL;
+ gen = calloc(sizeof(*gen), 1);
+ if (!gen)
+ return -ENOMEM;
+ gen->opts = opts;
+ obj->gen_loader = gen;
+ return 0;
}
static struct bpf_program *
@@ -8555,7 +8813,7 @@ __bpf_program__iter(const struct bpf_program *p, const struct bpf_object *obj,
if (p->obj != obj) {
pr_warn("error: program handler doesn't match object\n");
- return NULL;
+ return errno = EINVAL, NULL;
}
idx = (p - obj->programs) + (forward ? 1 : -1);
@@ -8601,7 +8859,7 @@ int bpf_program__set_priv(struct bpf_program *prog, void *priv,
void *bpf_program__priv(const struct bpf_program *prog)
{
- return prog ? prog->priv : ERR_PTR(-EINVAL);
+ return prog ? prog->priv : libbpf_err_ptr(-EINVAL);
}
void bpf_program__set_ifindex(struct bpf_program *prog, __u32 ifindex)
@@ -8628,7 +8886,7 @@ const char *bpf_program__title(const struct bpf_program *prog, bool needs_copy)
title = strdup(title);
if (!title) {
pr_warn("failed to strdup program title\n");
- return ERR_PTR(-ENOMEM);
+ return libbpf_err_ptr(-ENOMEM);
}
}
@@ -8643,7 +8901,7 @@ bool bpf_program__autoload(const struct bpf_program *prog)
int bpf_program__set_autoload(struct bpf_program *prog, bool autoload)
{
if (prog->obj->loaded)
- return -EINVAL;
+ return libbpf_err(-EINVAL);
prog->load = autoload;
return 0;
@@ -8665,17 +8923,17 @@ int bpf_program__set_prep(struct bpf_program *prog, int nr_instances,
int *instances_fds;
if (nr_instances <= 0 || !prep)
- return -EINVAL;
+ return libbpf_err(-EINVAL);
if (prog->instances.nr > 0 || prog->instances.fds) {
pr_warn("Can't set pre-processor after loading\n");
- return -EINVAL;
+ return libbpf_err(-EINVAL);
}
instances_fds = malloc(sizeof(int) * nr_instances);
if (!instances_fds) {
pr_warn("alloc memory failed for fds\n");
- return -ENOMEM;
+ return libbpf_err(-ENOMEM);
}
/* fill all fd with -1 */
@@ -8692,19 +8950,19 @@ int bpf_program__nth_fd(const struct bpf_program *prog, int n)
int fd;
if (!prog)
- return -EINVAL;
+ return libbpf_err(-EINVAL);
if (n >= prog->instances.nr || n < 0) {
pr_warn("Can't get the %dth fd from program %s: only %d instances\n",
n, prog->name, prog->instances.nr);
- return -EINVAL;
+ return libbpf_err(-EINVAL);
}
fd = prog->instances.fds[n];
if (fd < 0) {
pr_warn("%dth instance of program '%s' is invalid\n",
n, prog->name);
- return -ENOENT;
+ return libbpf_err(-ENOENT);
}
return fd;
@@ -8730,7 +8988,7 @@ static bool bpf_program__is_type(const struct bpf_program *prog,
int bpf_program__set_##NAME(struct bpf_program *prog) \
{ \
if (!prog) \
- return -EINVAL; \
+ return libbpf_err(-EINVAL); \
bpf_program__set_type(prog, TYPE); \
return 0; \
} \
@@ -8820,7 +9078,10 @@ static struct bpf_link *attach_iter(const struct bpf_sec_def *sec,
static const struct bpf_sec_def section_defs[] = {
BPF_PROG_SEC("socket", BPF_PROG_TYPE_SOCKET_FILTER),
- BPF_PROG_SEC("sk_reuseport", BPF_PROG_TYPE_SK_REUSEPORT),
+ BPF_EAPROG_SEC("sk_reuseport/migrate", BPF_PROG_TYPE_SK_REUSEPORT,
+ BPF_SK_REUSEPORT_SELECT_OR_MIGRATE),
+ BPF_EAPROG_SEC("sk_reuseport", BPF_PROG_TYPE_SK_REUSEPORT,
+ BPF_SK_REUSEPORT_SELECT),
SEC_DEF("kprobe/", KPROBE,
.attach_fn = attach_kprobe),
BPF_PROG_SEC("uprobe/", BPF_PROG_TYPE_KPROBE),
@@ -8884,6 +9145,8 @@ static const struct bpf_sec_def section_defs[] = {
.expected_attach_type = BPF_TRACE_ITER,
.is_attach_btf = true,
.attach_fn = attach_iter),
+ SEC_DEF("syscall", SYSCALL,
+ .is_sleepable = true),
BPF_EAPROG_SEC("xdp_devmap/", BPF_PROG_TYPE_XDP,
BPF_XDP_DEVMAP),
BPF_EAPROG_SEC("xdp_cpumap/", BPF_PROG_TYPE_XDP,
@@ -9015,7 +9278,7 @@ int libbpf_prog_type_by_name(const char *name, enum bpf_prog_type *prog_type,
char *type_names;
if (!name)
- return -EINVAL;
+ return libbpf_err(-EINVAL);
sec_def = find_sec_def(name);
if (sec_def) {
@@ -9031,7 +9294,7 @@ int libbpf_prog_type_by_name(const char *name, enum bpf_prog_type *prog_type,
free(type_names);
}
- return -ESRCH;
+ return libbpf_err(-ESRCH);
}
static struct bpf_map *find_struct_ops_map_by_offset(struct bpf_object *obj,
@@ -9173,6 +9436,28 @@ invalid_prog:
#define BTF_ITER_PREFIX "bpf_iter_"
#define BTF_MAX_NAME_SIZE 128
+void btf_get_kernel_prefix_kind(enum bpf_attach_type attach_type,
+ const char **prefix, int *kind)
+{
+ switch (attach_type) {
+ case BPF_TRACE_RAW_TP:
+ *prefix = BTF_TRACE_PREFIX;
+ *kind = BTF_KIND_TYPEDEF;
+ break;
+ case BPF_LSM_MAC:
+ *prefix = BTF_LSM_PREFIX;
+ *kind = BTF_KIND_FUNC;
+ break;
+ case BPF_TRACE_ITER:
+ *prefix = BTF_ITER_PREFIX;
+ *kind = BTF_KIND_FUNC;
+ break;
+ default:
+ *prefix = "";
+ *kind = BTF_KIND_FUNC;
+ }
+}
+
static int find_btf_by_prefix_kind(const struct btf *btf, const char *prefix,
const char *name, __u32 kind)
{
@@ -9193,21 +9478,11 @@ static int find_btf_by_prefix_kind(const struct btf *btf, const char *prefix,
static inline int find_attach_btf_id(struct btf *btf, const char *name,
enum bpf_attach_type attach_type)
{
- int err;
+ const char *prefix;
+ int kind;
- if (attach_type == BPF_TRACE_RAW_TP)
- err = find_btf_by_prefix_kind(btf, BTF_TRACE_PREFIX, name,
- BTF_KIND_TYPEDEF);
- else if (attach_type == BPF_LSM_MAC)
- err = find_btf_by_prefix_kind(btf, BTF_LSM_PREFIX, name,
- BTF_KIND_FUNC);
- else if (attach_type == BPF_TRACE_ITER)
- err = find_btf_by_prefix_kind(btf, BTF_ITER_PREFIX, name,
- BTF_KIND_FUNC);
- else
- err = btf__find_by_name_kind(btf, name, BTF_KIND_FUNC);
-
- return err;
+ btf_get_kernel_prefix_kind(attach_type, &prefix, &kind);
+ return find_btf_by_prefix_kind(btf, prefix, name, kind);
}
int libbpf_find_vmlinux_btf_id(const char *name,
@@ -9217,9 +9492,10 @@ int libbpf_find_vmlinux_btf_id(const char *name,
int err;
btf = libbpf_find_kernel_btf();
- if (IS_ERR(btf)) {
+ err = libbpf_get_error(btf);
+ if (err) {
pr_warn("vmlinux BTF is not found\n");
- return -EINVAL;
+ return libbpf_err(err);
}
err = find_attach_btf_id(btf, name, attach_type);
@@ -9227,7 +9503,7 @@ int libbpf_find_vmlinux_btf_id(const char *name,
pr_warn("%s is not found in vmlinux BTF\n", name);
btf__free(btf);
- return err;
+ return libbpf_err(err);
}
static int libbpf_find_prog_btf_id(const char *name, __u32 attach_prog_fd)
@@ -9238,10 +9514,11 @@ static int libbpf_find_prog_btf_id(const char *name, __u32 attach_prog_fd)
int err = -EINVAL;
info_linear = bpf_program__get_prog_info_linear(attach_prog_fd, 0);
- if (IS_ERR_OR_NULL(info_linear)) {
+ err = libbpf_get_error(info_linear);
+ if (err) {
pr_warn("failed get_prog_info_linear for FD %d\n",
attach_prog_fd);
- return -EINVAL;
+ return err;
}
info = &info_linear->info;
if (!info->btf_id) {
@@ -9306,7 +9583,7 @@ static int libbpf_find_attach_btf_id(struct bpf_program *prog, int *btf_obj_fd,
__u32 attach_prog_fd = prog->attach_prog_fd;
const char *name = prog->sec_name, *attach_name;
const struct bpf_sec_def *sec = NULL;
- int i, err;
+ int i, err = 0;
if (!name)
return -EINVAL;
@@ -9341,7 +9618,13 @@ static int libbpf_find_attach_btf_id(struct bpf_program *prog, int *btf_obj_fd,
}
/* kernel/module BTF ID */
- err = find_kernel_btf_id(prog->obj, attach_name, attach_type, btf_obj_fd, btf_type_id);
+ if (prog->obj->gen_loader) {
+ bpf_gen__record_attach_target(prog->obj->gen_loader, attach_name, attach_type);
+ *btf_obj_fd = 0;
+ *btf_type_id = 1;
+ } else {
+ err = find_kernel_btf_id(prog->obj, attach_name, attach_type, btf_obj_fd, btf_type_id);
+ }
if (err) {
pr_warn("failed to find kernel BTF type ID of '%s': %d\n", attach_name, err);
return err;
@@ -9356,13 +9639,13 @@ int libbpf_attach_type_by_name(const char *name,
int i;
if (!name)
- return -EINVAL;
+ return libbpf_err(-EINVAL);
for (i = 0; i < ARRAY_SIZE(section_defs); i++) {
if (strncmp(name, section_defs[i].sec, section_defs[i].len))
continue;
if (!section_defs[i].is_attachable)
- return -EINVAL;
+ return libbpf_err(-EINVAL);
*attach_type = section_defs[i].expected_attach_type;
return 0;
}
@@ -9373,17 +9656,17 @@ int libbpf_attach_type_by_name(const char *name,
free(type_names);
}
- return -EINVAL;
+ return libbpf_err(-EINVAL);
}
int bpf_map__fd(const struct bpf_map *map)
{
- return map ? map->fd : -EINVAL;
+ return map ? map->fd : libbpf_err(-EINVAL);
}
const struct bpf_map_def *bpf_map__def(const struct bpf_map *map)
{
- return map ? &map->def : ERR_PTR(-EINVAL);
+ return map ? &map->def : libbpf_err_ptr(-EINVAL);
}
const char *bpf_map__name(const struct bpf_map *map)
@@ -9399,7 +9682,7 @@ enum bpf_map_type bpf_map__type(const struct bpf_map *map)
int bpf_map__set_type(struct bpf_map *map, enum bpf_map_type type)
{
if (map->fd >= 0)
- return -EBUSY;
+ return libbpf_err(-EBUSY);
map->def.type = type;
return 0;
}
@@ -9412,7 +9695,7 @@ __u32 bpf_map__map_flags(const struct bpf_map *map)
int bpf_map__set_map_flags(struct bpf_map *map, __u32 flags)
{
if (map->fd >= 0)
- return -EBUSY;
+ return libbpf_err(-EBUSY);
map->def.map_flags = flags;
return 0;
}
@@ -9425,7 +9708,7 @@ __u32 bpf_map__numa_node(const struct bpf_map *map)
int bpf_map__set_numa_node(struct bpf_map *map, __u32 numa_node)
{
if (map->fd >= 0)
- return -EBUSY;
+ return libbpf_err(-EBUSY);
map->numa_node = numa_node;
return 0;
}
@@ -9438,7 +9721,7 @@ __u32 bpf_map__key_size(const struct bpf_map *map)
int bpf_map__set_key_size(struct bpf_map *map, __u32 size)
{
if (map->fd >= 0)
- return -EBUSY;
+ return libbpf_err(-EBUSY);
map->def.key_size = size;
return 0;
}
@@ -9451,7 +9734,7 @@ __u32 bpf_map__value_size(const struct bpf_map *map)
int bpf_map__set_value_size(struct bpf_map *map, __u32 size)
{
if (map->fd >= 0)
- return -EBUSY;
+ return libbpf_err(-EBUSY);
map->def.value_size = size;
return 0;
}
@@ -9470,7 +9753,7 @@ int bpf_map__set_priv(struct bpf_map *map, void *priv,
bpf_map_clear_priv_t clear_priv)
{
if (!map)
- return -EINVAL;
+ return libbpf_err(-EINVAL);
if (map->priv) {
if (map->clear_priv)
@@ -9484,7 +9767,7 @@ int bpf_map__set_priv(struct bpf_map *map, void *priv,
void *bpf_map__priv(const struct bpf_map *map)
{
- return map ? map->priv : ERR_PTR(-EINVAL);
+ return map ? map->priv : libbpf_err_ptr(-EINVAL);
}
int bpf_map__set_initial_value(struct bpf_map *map,
@@ -9492,12 +9775,20 @@ int bpf_map__set_initial_value(struct bpf_map *map,
{
if (!map->mmaped || map->libbpf_type == LIBBPF_MAP_KCONFIG ||
size != map->def.value_size || map->fd >= 0)
- return -EINVAL;
+ return libbpf_err(-EINVAL);
memcpy(map->mmaped, data, size);
return 0;
}
+const void *bpf_map__initial_value(struct bpf_map *map, size_t *psize)
+{
+ if (!map->mmaped)
+ return NULL;
+ *psize = map->def.value_size;
+ return map->mmaped;
+}
+
bool bpf_map__is_offload_neutral(const struct bpf_map *map)
{
return map->def.type == BPF_MAP_TYPE_PERF_EVENT_ARRAY;
@@ -9516,7 +9807,7 @@ __u32 bpf_map__ifindex(const struct bpf_map *map)
int bpf_map__set_ifindex(struct bpf_map *map, __u32 ifindex)
{
if (map->fd >= 0)
- return -EBUSY;
+ return libbpf_err(-EBUSY);
map->map_ifindex = ifindex;
return 0;
}
@@ -9525,11 +9816,11 @@ int bpf_map__set_inner_map_fd(struct bpf_map *map, int fd)
{
if (!bpf_map_type__is_map_in_map(map->def.type)) {
pr_warn("error: unsupported map type\n");
- return -EINVAL;
+ return libbpf_err(-EINVAL);
}
if (map->inner_map_fd != -1) {
pr_warn("error: inner_map_fd already specified\n");
- return -EINVAL;
+ return libbpf_err(-EINVAL);
}
zfree(&map->inner_map);
map->inner_map_fd = fd;
@@ -9543,7 +9834,7 @@ __bpf_map__iter(const struct bpf_map *m, const struct bpf_object *obj, int i)
struct bpf_map *s, *e;
if (!obj || !obj->maps)
- return NULL;
+ return errno = EINVAL, NULL;
s = obj->maps;
e = obj->maps + obj->nr_maps;
@@ -9551,7 +9842,7 @@ __bpf_map__iter(const struct bpf_map *m, const struct bpf_object *obj, int i)
if ((m < s) || (m >= e)) {
pr_warn("error in %s: map handler doesn't belong to object\n",
__func__);
- return NULL;
+ return errno = EINVAL, NULL;
}
idx = (m - obj->maps) + i;
@@ -9590,7 +9881,7 @@ bpf_object__find_map_by_name(const struct bpf_object *obj, const char *name)
if (pos->name && !strcmp(pos->name, name))
return pos;
}
- return NULL;
+ return errno = ENOENT, NULL;
}
int
@@ -9602,12 +9893,23 @@ bpf_object__find_map_fd_by_name(const struct bpf_object *obj, const char *name)
struct bpf_map *
bpf_object__find_map_by_offset(struct bpf_object *obj, size_t offset)
{
- return ERR_PTR(-ENOTSUP);
+ return libbpf_err_ptr(-ENOTSUP);
}
long libbpf_get_error(const void *ptr)
{
- return PTR_ERR_OR_ZERO(ptr);
+ if (!IS_ERR_OR_NULL(ptr))
+ return 0;
+
+ if (IS_ERR(ptr))
+ errno = -PTR_ERR(ptr);
+
+ /* If ptr == NULL, then errno should be already set by the failing
+ * API, because libbpf never returns NULL on success and it now always
+ * sets errno on error. So no extra errno handling for ptr == NULL
+ * case.
+ */
+ return -errno;
}
int bpf_prog_load(const char *file, enum bpf_prog_type type,
@@ -9633,16 +9935,17 @@ int bpf_prog_load_xattr(const struct bpf_prog_load_attr *attr,
int err;
if (!attr)
- return -EINVAL;
+ return libbpf_err(-EINVAL);
if (!attr->file)
- return -EINVAL;
+ return libbpf_err(-EINVAL);
open_attr.file = attr->file;
open_attr.prog_type = attr->prog_type;
obj = bpf_object__open_xattr(&open_attr);
- if (IS_ERR_OR_NULL(obj))
- return -ENOENT;
+ err = libbpf_get_error(obj);
+ if (err)
+ return libbpf_err(-ENOENT);
bpf_object__for_each_program(prog, obj) {
enum bpf_attach_type attach_type = attr->expected_attach_type;
@@ -9662,7 +9965,7 @@ int bpf_prog_load_xattr(const struct bpf_prog_load_attr *attr,
* didn't provide a fallback type, too bad...
*/
bpf_object__close(obj);
- return -EINVAL;
+ return libbpf_err(-EINVAL);
}
prog->prog_ifindex = attr->ifindex;
@@ -9680,13 +9983,13 @@ int bpf_prog_load_xattr(const struct bpf_prog_load_attr *attr,
if (!first_prog) {
pr_warn("object file doesn't contain bpf program\n");
bpf_object__close(obj);
- return -ENOENT;
+ return libbpf_err(-ENOENT);
}
err = bpf_object__load(obj);
if (err) {
bpf_object__close(obj);
- return err;
+ return libbpf_err(err);
}
*pobj = obj;
@@ -9705,7 +10008,10 @@ struct bpf_link {
/* Replace link's underlying BPF program with the new one */
int bpf_link__update_program(struct bpf_link *link, struct bpf_program *prog)
{
- return bpf_link_update(bpf_link__fd(link), bpf_program__fd(prog), NULL);
+ int ret;
+
+ ret = bpf_link_update(bpf_link__fd(link), bpf_program__fd(prog), NULL);
+ return libbpf_err_errno(ret);
}
/* Release "ownership" of underlying BPF resource (typically, BPF program
@@ -9738,7 +10044,7 @@ int bpf_link__destroy(struct bpf_link *link)
free(link->pin_path);
free(link);
- return err;
+ return libbpf_err(err);
}
int bpf_link__fd(const struct bpf_link *link)
@@ -9753,7 +10059,7 @@ const char *bpf_link__pin_path(const struct bpf_link *link)
static int bpf_link__detach_fd(struct bpf_link *link)
{
- return close(link->fd);
+ return libbpf_err_errno(close(link->fd));
}
struct bpf_link *bpf_link__open(const char *path)
@@ -9765,13 +10071,13 @@ struct bpf_link *bpf_link__open(const char *path)
if (fd < 0) {
fd = -errno;
pr_warn("failed to open link at %s: %d\n", path, fd);
- return ERR_PTR(fd);
+ return libbpf_err_ptr(fd);
}
link = calloc(1, sizeof(*link));
if (!link) {
close(fd);
- return ERR_PTR(-ENOMEM);
+ return libbpf_err_ptr(-ENOMEM);
}
link->detach = &bpf_link__detach_fd;
link->fd = fd;
@@ -9779,7 +10085,7 @@ struct bpf_link *bpf_link__open(const char *path)
link->pin_path = strdup(path);
if (!link->pin_path) {
bpf_link__destroy(link);
- return ERR_PTR(-ENOMEM);
+ return libbpf_err_ptr(-ENOMEM);
}
return link;
@@ -9795,22 +10101,22 @@ int bpf_link__pin(struct bpf_link *link, const char *path)
int err;
if (link->pin_path)
- return -EBUSY;
+ return libbpf_err(-EBUSY);
err = make_parent_dir(path);
if (err)
- return err;
+ return libbpf_err(err);
err = check_path(path);
if (err)
- return err;
+ return libbpf_err(err);
link->pin_path = strdup(path);
if (!link->pin_path)
- return -ENOMEM;
+ return libbpf_err(-ENOMEM);
if (bpf_obj_pin(link->fd, link->pin_path)) {
err = -errno;
zfree(&link->pin_path);
- return err;
+ return libbpf_err(err);
}
pr_debug("link fd=%d: pinned at %s\n", link->fd, link->pin_path);
@@ -9822,11 +10128,11 @@ int bpf_link__unpin(struct bpf_link *link)
int err;
if (!link->pin_path)
- return -EINVAL;
+ return libbpf_err(-EINVAL);
err = unlink(link->pin_path);
if (err != 0)
- return -errno;
+ return libbpf_err_errno(err);
pr_debug("link fd=%d: unpinned from %s\n", link->fd, link->pin_path);
zfree(&link->pin_path);
@@ -9842,11 +10148,10 @@ static int bpf_link__detach_perf_event(struct bpf_link *link)
err = -errno;
close(link->fd);
- return err;
+ return libbpf_err(err);
}
-struct bpf_link *bpf_program__attach_perf_event(struct bpf_program *prog,
- int pfd)
+struct bpf_link *bpf_program__attach_perf_event(struct bpf_program *prog, int pfd)
{
char errmsg[STRERR_BUFSIZE];
struct bpf_link *link;
@@ -9855,18 +10160,18 @@ struct bpf_link *bpf_program__attach_perf_event(struct bpf_program *prog,
if (pfd < 0) {
pr_warn("prog '%s': invalid perf event FD %d\n",
prog->name, pfd);
- return ERR_PTR(-EINVAL);
+ return libbpf_err_ptr(-EINVAL);
}
prog_fd = bpf_program__fd(prog);
if (prog_fd < 0) {
pr_warn("prog '%s': can't attach BPF program w/o FD (did you load it?)\n",
prog->name);
- return ERR_PTR(-EINVAL);
+ return libbpf_err_ptr(-EINVAL);
}
link = calloc(1, sizeof(*link));
if (!link)
- return ERR_PTR(-ENOMEM);
+ return libbpf_err_ptr(-ENOMEM);
link->detach = &bpf_link__detach_perf_event;
link->fd = pfd;
@@ -9878,14 +10183,14 @@ struct bpf_link *bpf_program__attach_perf_event(struct bpf_program *prog,
if (err == -EPROTO)
pr_warn("prog '%s': try add PERF_SAMPLE_CALLCHAIN to or remove exclude_callchain_[kernel|user] from pfd %d\n",
prog->name, pfd);
- return ERR_PTR(err);
+ return libbpf_err_ptr(err);
}
if (ioctl(pfd, PERF_EVENT_IOC_ENABLE, 0) < 0) {
err = -errno;
free(link);
pr_warn("prog '%s': failed to enable pfd %d: %s\n",
prog->name, pfd, libbpf_strerror_r(err, errmsg, sizeof(errmsg)));
- return ERR_PTR(err);
+ return libbpf_err_ptr(err);
}
return link;
}
@@ -10009,16 +10314,16 @@ struct bpf_link *bpf_program__attach_kprobe(struct bpf_program *prog,
pr_warn("prog '%s': failed to create %s '%s' perf event: %s\n",
prog->name, retprobe ? "kretprobe" : "kprobe", func_name,
libbpf_strerror_r(pfd, errmsg, sizeof(errmsg)));
- return ERR_PTR(pfd);
+ return libbpf_err_ptr(pfd);
}
link = bpf_program__attach_perf_event(prog, pfd);
- if (IS_ERR(link)) {
+ err = libbpf_get_error(link);
+ if (err) {
close(pfd);
- err = PTR_ERR(link);
pr_warn("prog '%s': failed to attach to %s '%s': %s\n",
prog->name, retprobe ? "kretprobe" : "kprobe", func_name,
libbpf_strerror_r(err, errmsg, sizeof(errmsg)));
- return link;
+ return libbpf_err_ptr(err);
}
return link;
}
@@ -10051,17 +10356,17 @@ struct bpf_link *bpf_program__attach_uprobe(struct bpf_program *prog,
prog->name, retprobe ? "uretprobe" : "uprobe",
binary_path, func_offset,
libbpf_strerror_r(pfd, errmsg, sizeof(errmsg)));
- return ERR_PTR(pfd);
+ return libbpf_err_ptr(pfd);
}
link = bpf_program__attach_perf_event(prog, pfd);
- if (IS_ERR(link)) {
+ err = libbpf_get_error(link);
+ if (err) {
close(pfd);
- err = PTR_ERR(link);
pr_warn("prog '%s': failed to attach to %s '%s:0x%zx': %s\n",
prog->name, retprobe ? "uretprobe" : "uprobe",
binary_path, func_offset,
libbpf_strerror_r(err, errmsg, sizeof(errmsg)));
- return link;
+ return libbpf_err_ptr(err);
}
return link;
}
@@ -10129,16 +10434,16 @@ struct bpf_link *bpf_program__attach_tracepoint(struct bpf_program *prog,
pr_warn("prog '%s': failed to create tracepoint '%s/%s' perf event: %s\n",
prog->name, tp_category, tp_name,
libbpf_strerror_r(pfd, errmsg, sizeof(errmsg)));
- return ERR_PTR(pfd);
+ return libbpf_err_ptr(pfd);
}
link = bpf_program__attach_perf_event(prog, pfd);
- if (IS_ERR(link)) {
+ err = libbpf_get_error(link);
+ if (err) {
close(pfd);
- err = PTR_ERR(link);
pr_warn("prog '%s': failed to attach to tracepoint '%s/%s': %s\n",
prog->name, tp_category, tp_name,
libbpf_strerror_r(err, errmsg, sizeof(errmsg)));
- return link;
+ return libbpf_err_ptr(err);
}
return link;
}
@@ -10151,20 +10456,19 @@ static struct bpf_link *attach_tp(const struct bpf_sec_def *sec,
sec_name = strdup(prog->sec_name);
if (!sec_name)
- return ERR_PTR(-ENOMEM);
+ return libbpf_err_ptr(-ENOMEM);
/* extract "tp/<category>/<name>" */
tp_cat = sec_name + sec->len;
tp_name = strchr(tp_cat, '/');
if (!tp_name) {
- link = ERR_PTR(-EINVAL);
- goto out;
+ free(sec_name);
+ return libbpf_err_ptr(-EINVAL);
}
*tp_name = '\0';
tp_name++;
link = bpf_program__attach_tracepoint(prog, tp_cat, tp_name);
-out:
free(sec_name);
return link;
}
@@ -10179,12 +10483,12 @@ struct bpf_link *bpf_program__attach_raw_tracepoint(struct bpf_program *prog,
prog_fd = bpf_program__fd(prog);
if (prog_fd < 0) {
pr_warn("prog '%s': can't attach before loaded\n", prog->name);
- return ERR_PTR(-EINVAL);
+ return libbpf_err_ptr(-EINVAL);
}
link = calloc(1, sizeof(*link));
if (!link)
- return ERR_PTR(-ENOMEM);
+ return libbpf_err_ptr(-ENOMEM);
link->detach = &bpf_link__detach_fd;
pfd = bpf_raw_tracepoint_open(tp_name, prog_fd);
@@ -10193,7 +10497,7 @@ struct bpf_link *bpf_program__attach_raw_tracepoint(struct bpf_program *prog,
free(link);
pr_warn("prog '%s': failed to attach to raw tracepoint '%s': %s\n",
prog->name, tp_name, libbpf_strerror_r(pfd, errmsg, sizeof(errmsg)));
- return ERR_PTR(pfd);
+ return libbpf_err_ptr(pfd);
}
link->fd = pfd;
return link;
@@ -10217,12 +10521,12 @@ static struct bpf_link *bpf_program__attach_btf_id(struct bpf_program *prog)
prog_fd = bpf_program__fd(prog);
if (prog_fd < 0) {
pr_warn("prog '%s': can't attach before loaded\n", prog->name);
- return ERR_PTR(-EINVAL);
+ return libbpf_err_ptr(-EINVAL);
}
link = calloc(1, sizeof(*link));
if (!link)
- return ERR_PTR(-ENOMEM);
+ return libbpf_err_ptr(-ENOMEM);
link->detach = &bpf_link__detach_fd;
pfd = bpf_raw_tracepoint_open(NULL, prog_fd);
@@ -10231,7 +10535,7 @@ static struct bpf_link *bpf_program__attach_btf_id(struct bpf_program *prog)
free(link);
pr_warn("prog '%s': failed to attach: %s\n",
prog->name, libbpf_strerror_r(pfd, errmsg, sizeof(errmsg)));
- return ERR_PTR(pfd);
+ return libbpf_err_ptr(pfd);
}
link->fd = pfd;
return (struct bpf_link *)link;
@@ -10259,12 +10563,6 @@ static struct bpf_link *attach_lsm(const struct bpf_sec_def *sec,
return bpf_program__attach_lsm(prog);
}
-static struct bpf_link *attach_iter(const struct bpf_sec_def *sec,
- struct bpf_program *prog)
-{
- return bpf_program__attach_iter(prog, NULL);
-}
-
static struct bpf_link *
bpf_program__attach_fd(struct bpf_program *prog, int target_fd, int btf_id,
const char *target_name)
@@ -10279,12 +10577,12 @@ bpf_program__attach_fd(struct bpf_program *prog, int target_fd, int btf_id,
prog_fd = bpf_program__fd(prog);
if (prog_fd < 0) {
pr_warn("prog '%s': can't attach before loaded\n", prog->name);
- return ERR_PTR(-EINVAL);
+ return libbpf_err_ptr(-EINVAL);
}
link = calloc(1, sizeof(*link));
if (!link)
- return ERR_PTR(-ENOMEM);
+ return libbpf_err_ptr(-ENOMEM);
link->detach = &bpf_link__detach_fd;
attach_type = bpf_program__get_expected_attach_type(prog);
@@ -10295,7 +10593,7 @@ bpf_program__attach_fd(struct bpf_program *prog, int target_fd, int btf_id,
pr_warn("prog '%s': failed to attach to %s: %s\n",
prog->name, target_name,
libbpf_strerror_r(link_fd, errmsg, sizeof(errmsg)));
- return ERR_PTR(link_fd);
+ return libbpf_err_ptr(link_fd);
}
link->fd = link_fd;
return link;
@@ -10328,19 +10626,19 @@ struct bpf_link *bpf_program__attach_freplace(struct bpf_program *prog,
if (!!target_fd != !!attach_func_name) {
pr_warn("prog '%s': supply none or both of target_fd and attach_func_name\n",
prog->name);
- return ERR_PTR(-EINVAL);
+ return libbpf_err_ptr(-EINVAL);
}
if (prog->type != BPF_PROG_TYPE_EXT) {
pr_warn("prog '%s': only BPF_PROG_TYPE_EXT can attach as freplace",
prog->name);
- return ERR_PTR(-EINVAL);
+ return libbpf_err_ptr(-EINVAL);
}
if (target_fd) {
btf_id = libbpf_find_prog_btf_id(attach_func_name, target_fd);
if (btf_id < 0)
- return ERR_PTR(btf_id);
+ return libbpf_err_ptr(btf_id);
return bpf_program__attach_fd(prog, target_fd, btf_id, "freplace");
} else {
@@ -10362,7 +10660,7 @@ bpf_program__attach_iter(struct bpf_program *prog,
__u32 target_fd = 0;
if (!OPTS_VALID(opts, bpf_iter_attach_opts))
- return ERR_PTR(-EINVAL);
+ return libbpf_err_ptr(-EINVAL);
link_create_opts.iter_info = OPTS_GET(opts, link_info, (void *)0);
link_create_opts.iter_info_len = OPTS_GET(opts, link_info_len, 0);
@@ -10370,12 +10668,12 @@ bpf_program__attach_iter(struct bpf_program *prog,
prog_fd = bpf_program__fd(prog);
if (prog_fd < 0) {
pr_warn("prog '%s': can't attach before loaded\n", prog->name);
- return ERR_PTR(-EINVAL);
+ return libbpf_err_ptr(-EINVAL);
}
link = calloc(1, sizeof(*link));
if (!link)
- return ERR_PTR(-ENOMEM);
+ return libbpf_err_ptr(-ENOMEM);
link->detach = &bpf_link__detach_fd;
link_fd = bpf_link_create(prog_fd, target_fd, BPF_TRACE_ITER,
@@ -10385,19 +10683,25 @@ bpf_program__attach_iter(struct bpf_program *prog,
free(link);
pr_warn("prog '%s': failed to attach to iterator: %s\n",
prog->name, libbpf_strerror_r(link_fd, errmsg, sizeof(errmsg)));
- return ERR_PTR(link_fd);
+ return libbpf_err_ptr(link_fd);
}
link->fd = link_fd;
return link;
}
+static struct bpf_link *attach_iter(const struct bpf_sec_def *sec,
+ struct bpf_program *prog)
+{
+ return bpf_program__attach_iter(prog, NULL);
+}
+
struct bpf_link *bpf_program__attach(struct bpf_program *prog)
{
const struct bpf_sec_def *sec_def;
sec_def = find_sec_def(prog->sec_name);
if (!sec_def || !sec_def->attach_fn)
- return ERR_PTR(-ESRCH);
+ return libbpf_err_ptr(-ESRCH);
return sec_def->attach_fn(sec_def, prog);
}
@@ -10420,11 +10724,11 @@ struct bpf_link *bpf_map__attach_struct_ops(struct bpf_map *map)
int err;
if (!bpf_map__is_struct_ops(map) || map->fd == -1)
- return ERR_PTR(-EINVAL);
+ return libbpf_err_ptr(-EINVAL);
link = calloc(1, sizeof(*link));
if (!link)
- return ERR_PTR(-EINVAL);
+ return libbpf_err_ptr(-EINVAL);
st_ops = map->st_ops;
for (i = 0; i < btf_vlen(st_ops->type); i++) {
@@ -10444,7 +10748,7 @@ struct bpf_link *bpf_map__attach_struct_ops(struct bpf_map *map)
if (err) {
err = -errno;
free(link);
- return ERR_PTR(err);
+ return libbpf_err_ptr(err);
}
link->detach = bpf_link__detach_struct_ops;
@@ -10498,7 +10802,7 @@ bpf_perf_event_read_simple(void *mmap_mem, size_t mmap_size, size_t page_size,
}
ring_buffer_write_tail(header, data_tail);
- return ret;
+ return libbpf_err(ret);
}
struct perf_buffer;
@@ -10651,7 +10955,7 @@ struct perf_buffer *perf_buffer__new(int map_fd, size_t page_cnt,
p.lost_cb = opts ? opts->lost_cb : NULL;
p.ctx = opts ? opts->ctx : NULL;
- return __perf_buffer__new(map_fd, page_cnt, &p);
+ return libbpf_ptr(__perf_buffer__new(map_fd, page_cnt, &p));
}
struct perf_buffer *
@@ -10667,7 +10971,7 @@ perf_buffer__new_raw(int map_fd, size_t page_cnt,
p.cpus = opts->cpus;
p.map_keys = opts->map_keys;
- return __perf_buffer__new(map_fd, page_cnt, &p);
+ return libbpf_ptr(__perf_buffer__new(map_fd, page_cnt, &p));
}
static struct perf_buffer *__perf_buffer__new(int map_fd, size_t page_cnt,
@@ -10888,16 +11192,19 @@ int perf_buffer__poll(struct perf_buffer *pb, int timeout_ms)
int i, cnt, err;
cnt = epoll_wait(pb->epoll_fd, pb->events, pb->cpu_cnt, timeout_ms);
+ if (cnt < 0)
+ return libbpf_err_errno(cnt);
+
for (i = 0; i < cnt; i++) {
struct perf_cpu_buf *cpu_buf = pb->events[i].data.ptr;
err = perf_buffer__process_records(pb, cpu_buf);
if (err) {
pr_warn("error while processing records: %d\n", err);
- return err;
+ return libbpf_err(err);
}
}
- return cnt < 0 ? -errno : cnt;
+ return cnt;
}
/* Return number of PERF_EVENT_ARRAY map slots set up by this perf_buffer
@@ -10918,11 +11225,11 @@ int perf_buffer__buffer_fd(const struct perf_buffer *pb, size_t buf_idx)
struct perf_cpu_buf *cpu_buf;
if (buf_idx >= pb->cpu_cnt)
- return -EINVAL;
+ return libbpf_err(-EINVAL);
cpu_buf = pb->cpu_bufs[buf_idx];
if (!cpu_buf)
- return -ENOENT;
+ return libbpf_err(-ENOENT);
return cpu_buf->fd;
}
@@ -10940,11 +11247,11 @@ int perf_buffer__consume_buffer(struct perf_buffer *pb, size_t buf_idx)
struct perf_cpu_buf *cpu_buf;
if (buf_idx >= pb->cpu_cnt)
- return -EINVAL;
+ return libbpf_err(-EINVAL);
cpu_buf = pb->cpu_bufs[buf_idx];
if (!cpu_buf)
- return -ENOENT;
+ return libbpf_err(-ENOENT);
return perf_buffer__process_records(pb, cpu_buf);
}
@@ -10962,7 +11269,7 @@ int perf_buffer__consume(struct perf_buffer *pb)
err = perf_buffer__process_records(pb, cpu_buf);
if (err) {
pr_warn("perf_buffer: failed to process records in buffer #%d: %d\n", i, err);
- return err;
+ return libbpf_err(err);
}
}
return 0;
@@ -11074,13 +11381,13 @@ bpf_program__get_prog_info_linear(int fd, __u64 arrays)
void *ptr;
if (arrays >> BPF_PROG_INFO_LAST_ARRAY)
- return ERR_PTR(-EINVAL);
+ return libbpf_err_ptr(-EINVAL);
/* step 1: get array dimensions */
err = bpf_obj_get_info_by_fd(fd, &info, &info_len);
if (err) {
pr_debug("can't get prog info: %s", strerror(errno));
- return ERR_PTR(-EFAULT);
+ return libbpf_err_ptr(-EFAULT);
}
/* step 2: calculate total size of all arrays */
@@ -11112,7 +11419,7 @@ bpf_program__get_prog_info_linear(int fd, __u64 arrays)
data_len = roundup(data_len, sizeof(__u64));
info_linear = malloc(sizeof(struct bpf_prog_info_linear) + data_len);
if (!info_linear)
- return ERR_PTR(-ENOMEM);
+ return libbpf_err_ptr(-ENOMEM);
/* step 4: fill data to info_linear->info */
info_linear->arrays = arrays;
@@ -11144,7 +11451,7 @@ bpf_program__get_prog_info_linear(int fd, __u64 arrays)
if (err) {
pr_debug("can't get prog info: %s", strerror(errno));
free(info_linear);
- return ERR_PTR(-EFAULT);
+ return libbpf_err_ptr(-EFAULT);
}
/* step 6: verify the data */
@@ -11223,26 +11530,26 @@ int bpf_program__set_attach_target(struct bpf_program *prog,
int btf_obj_fd = 0, btf_id = 0, err;
if (!prog || attach_prog_fd < 0 || !attach_func_name)
- return -EINVAL;
+ return libbpf_err(-EINVAL);
if (prog->obj->loaded)
- return -EINVAL;
+ return libbpf_err(-EINVAL);
if (attach_prog_fd) {
btf_id = libbpf_find_prog_btf_id(attach_func_name,
attach_prog_fd);
if (btf_id < 0)
- return btf_id;
+ return libbpf_err(btf_id);
} else {
/* load btf_vmlinux, if not yet */
err = bpf_object__load_vmlinux_btf(prog->obj, true);
if (err)
- return err;
+ return libbpf_err(err);
err = find_kernel_btf_id(prog->obj, attach_func_name,
prog->expected_attach_type,
&btf_obj_fd, &btf_id);
if (err)
- return err;
+ return libbpf_err(err);
}
prog->attach_btf_id = btf_id;
@@ -11341,7 +11648,7 @@ int libbpf_num_possible_cpus(void)
err = parse_cpu_mask_file(fcpu, &mask, &n);
if (err)
- return err;
+ return libbpf_err(err);
tmp_cpus = 0;
for (i = 0; i < n; i++) {
@@ -11361,7 +11668,7 @@ int bpf_object__open_skeleton(struct bpf_object_skeleton *s,
.object_name = s->name,
);
struct bpf_object *obj;
- int i;
+ int i, err;
/* Attempt to preserve opts->object_name, unless overriden by user
* explicitly. Overwriting object name for skeletons is discouraged,
@@ -11376,10 +11683,11 @@ int bpf_object__open_skeleton(struct bpf_object_skeleton *s,
}
obj = bpf_object__open_mem(s->data, s->data_sz, &skel_opts);
- if (IS_ERR(obj)) {
- pr_warn("failed to initialize skeleton BPF object '%s': %ld\n",
- s->name, PTR_ERR(obj));
- return PTR_ERR(obj);
+ err = libbpf_get_error(obj);
+ if (err) {
+ pr_warn("failed to initialize skeleton BPF object '%s': %d\n",
+ s->name, err);
+ return libbpf_err(err);
}
*s->obj = obj;
@@ -11392,7 +11700,7 @@ int bpf_object__open_skeleton(struct bpf_object_skeleton *s,
*map = bpf_object__find_map_by_name(obj, name);
if (!*map) {
pr_warn("failed to find skeleton map '%s'\n", name);
- return -ESRCH;
+ return libbpf_err(-ESRCH);
}
/* externs shouldn't be pre-setup from user code */
@@ -11407,7 +11715,7 @@ int bpf_object__open_skeleton(struct bpf_object_skeleton *s,
*prog = bpf_object__find_program_by_name(obj, name);
if (!*prog) {
pr_warn("failed to find skeleton program '%s'\n", name);
- return -ESRCH;
+ return libbpf_err(-ESRCH);
}
}
@@ -11421,7 +11729,7 @@ int bpf_object__load_skeleton(struct bpf_object_skeleton *s)
err = bpf_object__load(*s->obj);
if (err) {
pr_warn("failed to load BPF skeleton '%s': %d\n", s->name, err);
- return err;
+ return libbpf_err(err);
}
for (i = 0; i < s->map_cnt; i++) {
@@ -11460,7 +11768,7 @@ int bpf_object__load_skeleton(struct bpf_object_skeleton *s)
*mmaped = NULL;
pr_warn("failed to re-mmap() map '%s': %d\n",
bpf_map__name(map), err);
- return err;
+ return libbpf_err(err);
}
}
@@ -11469,7 +11777,7 @@ int bpf_object__load_skeleton(struct bpf_object_skeleton *s)
int bpf_object__attach_skeleton(struct bpf_object_skeleton *s)
{
- int i;
+ int i, err;
for (i = 0; i < s->prog_cnt; i++) {
struct bpf_program *prog = *s->progs[i].prog;
@@ -11484,10 +11792,11 @@ int bpf_object__attach_skeleton(struct bpf_object_skeleton *s)
continue;
*link = sec_def->attach_fn(sec_def, prog);
- if (IS_ERR(*link)) {
- pr_warn("failed to auto-attach program '%s': %ld\n",
- bpf_program__name(prog), PTR_ERR(*link));
- return PTR_ERR(*link);
+ err = libbpf_get_error(*link);
+ if (err) {
+ pr_warn("failed to auto-attach program '%s': %d\n",
+ bpf_program__name(prog), err);
+ return libbpf_err(err);
}
}
generated by cgit (git 2.34.1) at 2025-05-31 03:05:46 +0000