diff options
Diffstat (limited to 'tools/lib/bpf')
| -rw-r--r-- | tools/lib/bpf/bpf.c | 69 | ||||
| -rw-r--r-- | tools/lib/bpf/bpf.h | 1 | ||||
| -rw-r--r-- | tools/lib/bpf/btf.c | 182 | ||||
| -rw-r--r-- | tools/lib/bpf/btf.h | 6 | ||||
| -rw-r--r-- | tools/lib/bpf/libbpf.c | 25 | ||||
| -rw-r--r-- | tools/lib/bpf/libbpf.h | 4 | ||||
| -rw-r--r-- | tools/lib/bpf/libbpf.map | 6 |
7 files changed, 174 insertions, 119 deletions
diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c index 3defad77dc7a..9cd015574e83 100644 --- a/tools/lib/bpf/bpf.c +++ b/tools/lib/bpf/bpf.c @@ -22,6 +22,7 @@ */ #include <stdlib.h> +#include <string.h> #include <memory.h> #include <unistd.h> #include <asm/unistd.h> @@ -214,23 +215,35 @@ int bpf_load_program_xattr(const struct bpf_load_program_attr *load_attr, { void *finfo = NULL, *linfo = NULL; union bpf_attr attr; + __u32 log_level; __u32 name_len; int fd; - if (!load_attr) + if (!load_attr || !log_buf != !log_buf_sz) + return -EINVAL; + + log_level = load_attr->log_level; + if (log_level > 2 || (log_level && !log_buf)) return -EINVAL; name_len = load_attr->name ? strlen(load_attr->name) : 0; - bzero(&attr, sizeof(attr)); + memset(&attr, 0, sizeof(attr)); attr.prog_type = load_attr->prog_type; attr.expected_attach_type = load_attr->expected_attach_type; attr.insn_cnt = (__u32)load_attr->insns_cnt; attr.insns = ptr_to_u64(load_attr->insns); attr.license = ptr_to_u64(load_attr->license); - attr.log_buf = ptr_to_u64(NULL); - attr.log_size = 0; - attr.log_level = 0; + + attr.log_level = log_level; + if (log_level) { + attr.log_buf = ptr_to_u64(log_buf); + attr.log_size = log_buf_sz; + } else { + attr.log_buf = ptr_to_u64(NULL); + attr.log_size = 0; + } + attr.kern_version = load_attr->kern_version; attr.prog_ifindex = load_attr->prog_ifindex; attr.prog_btf_fd = load_attr->prog_btf_fd; @@ -286,7 +299,7 @@ int bpf_load_program_xattr(const struct bpf_load_program_attr *load_attr, goto done; } - if (!log_buf || !log_buf_sz) + if (log_level || !log_buf) goto done; /* Try again with log */ @@ -327,7 +340,7 @@ int bpf_verify_program(enum bpf_prog_type type, const struct bpf_insn *insns, { union bpf_attr attr; - bzero(&attr, sizeof(attr)); + memset(&attr, 0, sizeof(attr)); attr.prog_type = type; attr.insn_cnt = (__u32)insns_cnt; attr.insns = ptr_to_u64(insns); @@ -347,7 +360,7 @@ int bpf_map_update_elem(int fd, const void *key, const void *value, { union bpf_attr attr; - bzero(&attr, sizeof(attr)); + memset(&attr, 0, sizeof(attr)); attr.map_fd = fd; attr.key = ptr_to_u64(key); attr.value = ptr_to_u64(value); @@ -360,7 +373,7 @@ int bpf_map_lookup_elem(int fd, const void *key, void *value) { union bpf_attr attr; - bzero(&attr, sizeof(attr)); + memset(&attr, 0, sizeof(attr)); attr.map_fd = fd; attr.key = ptr_to_u64(key); attr.value = ptr_to_u64(value); @@ -372,7 +385,7 @@ int bpf_map_lookup_elem_flags(int fd, const void *key, void *value, __u64 flags) { union bpf_attr attr; - bzero(&attr, sizeof(attr)); + memset(&attr, 0, sizeof(attr)); attr.map_fd = fd; attr.key = ptr_to_u64(key); attr.value = ptr_to_u64(value); @@ -385,7 +398,7 @@ int bpf_map_lookup_and_delete_elem(int fd, const void *key, void *value) { union bpf_attr attr; - bzero(&attr, sizeof(attr)); + memset(&attr, 0, sizeof(attr)); attr.map_fd = fd; attr.key = ptr_to_u64(key); attr.value = ptr_to_u64(value); @@ -397,7 +410,7 @@ int bpf_map_delete_elem(int fd, const void *key) { union bpf_attr attr; - bzero(&attr, sizeof(attr)); + memset(&attr, 0, sizeof(attr)); attr.map_fd = fd; attr.key = ptr_to_u64(key); @@ -408,7 +421,7 @@ int bpf_map_get_next_key(int fd, const void *key, void *next_key) { union bpf_attr attr; - bzero(&attr, sizeof(attr)); + memset(&attr, 0, sizeof(attr)); attr.map_fd = fd; attr.key = ptr_to_u64(key); attr.next_key = ptr_to_u64(next_key); @@ -420,7 +433,7 @@ int bpf_obj_pin(int fd, const char *pathname) { union bpf_attr attr; - bzero(&attr, sizeof(attr)); + memset(&attr, 0, sizeof(attr)); attr.pathname = ptr_to_u64((void *)pathname); attr.bpf_fd = fd; @@ -431,7 +444,7 @@ int bpf_obj_get(const char *pathname) { union bpf_attr attr; - bzero(&attr, sizeof(attr)); + memset(&attr, 0, sizeof(attr)); attr.pathname = ptr_to_u64((void *)pathname); return sys_bpf(BPF_OBJ_GET, &attr, sizeof(attr)); @@ -442,7 +455,7 @@ int bpf_prog_attach(int prog_fd, int target_fd, enum bpf_attach_type type, { union bpf_attr attr; - bzero(&attr, sizeof(attr)); + memset(&attr, 0, sizeof(attr)); attr.target_fd = target_fd; attr.attach_bpf_fd = prog_fd; attr.attach_type = type; @@ -455,7 +468,7 @@ int bpf_prog_detach(int target_fd, enum bpf_attach_type type) { union bpf_attr attr; - bzero(&attr, sizeof(attr)); + memset(&attr, 0, sizeof(attr)); attr.target_fd = target_fd; attr.attach_type = type; @@ -466,7 +479,7 @@ int bpf_prog_detach2(int prog_fd, int target_fd, enum bpf_attach_type type) { union bpf_attr attr; - bzero(&attr, sizeof(attr)); + memset(&attr, 0, sizeof(attr)); attr.target_fd = target_fd; attr.attach_bpf_fd = prog_fd; attr.attach_type = type; @@ -480,7 +493,7 @@ int bpf_prog_query(int target_fd, enum bpf_attach_type type, __u32 query_flags, union bpf_attr attr; int ret; - bzero(&attr, sizeof(attr)); + memset(&attr, 0, sizeof(attr)); attr.query.target_fd = target_fd; attr.query.attach_type = type; attr.query.query_flags = query_flags; @@ -501,7 +514,7 @@ int bpf_prog_test_run(int prog_fd, int repeat, void *data, __u32 size, union bpf_attr attr; int ret; - bzero(&attr, sizeof(attr)); + memset(&attr, 0, sizeof(attr)); attr.test.prog_fd = prog_fd; attr.test.data_in = ptr_to_u64(data); attr.test.data_out = ptr_to_u64(data_out); @@ -526,7 +539,7 @@ int bpf_prog_test_run_xattr(struct bpf_prog_test_run_attr *test_attr) if (!test_attr->data_out && test_attr->data_size_out > 0) return -EINVAL; - bzero(&attr, sizeof(attr)); + memset(&attr, 0, sizeof(attr)); attr.test.prog_fd = test_attr->prog_fd; attr.test.data_in = ptr_to_u64(test_attr->data_in); attr.test.data_out = ptr_to_u64(test_attr->data_out); @@ -546,7 +559,7 @@ int bpf_prog_get_next_id(__u32 start_id, __u32 *next_id) union bpf_attr attr; int err; - bzero(&attr, sizeof(attr)); + memset(&attr, 0, sizeof(attr)); attr.start_id = start_id; err = sys_bpf(BPF_PROG_GET_NEXT_ID, &attr, sizeof(attr)); @@ -561,7 +574,7 @@ int bpf_map_get_next_id(__u32 start_id, __u32 *next_id) union bpf_attr attr; int err; - bzero(&attr, sizeof(attr)); + memset(&attr, 0, sizeof(attr)); attr.start_id = start_id; err = sys_bpf(BPF_MAP_GET_NEXT_ID, &attr, sizeof(attr)); @@ -575,7 +588,7 @@ int bpf_prog_get_fd_by_id(__u32 id) { union bpf_attr attr; - bzero(&attr, sizeof(attr)); + memset(&attr, 0, sizeof(attr)); attr.prog_id = id; return sys_bpf(BPF_PROG_GET_FD_BY_ID, &attr, sizeof(attr)); @@ -585,7 +598,7 @@ int bpf_map_get_fd_by_id(__u32 id) { union bpf_attr attr; - bzero(&attr, sizeof(attr)); + memset(&attr, 0, sizeof(attr)); attr.map_id = id; return sys_bpf(BPF_MAP_GET_FD_BY_ID, &attr, sizeof(attr)); @@ -595,7 +608,7 @@ int bpf_btf_get_fd_by_id(__u32 id) { union bpf_attr attr; - bzero(&attr, sizeof(attr)); + memset(&attr, 0, sizeof(attr)); attr.btf_id = id; return sys_bpf(BPF_BTF_GET_FD_BY_ID, &attr, sizeof(attr)); @@ -606,7 +619,7 @@ int bpf_obj_get_info_by_fd(int prog_fd, void *info, __u32 *info_len) union bpf_attr attr; int err; - bzero(&attr, sizeof(attr)); + memset(&attr, 0, sizeof(attr)); attr.info.bpf_fd = prog_fd; attr.info.info_len = *info_len; attr.info.info = ptr_to_u64(info); @@ -622,7 +635,7 @@ int bpf_raw_tracepoint_open(const char *name, int prog_fd) { union bpf_attr attr; - bzero(&attr, sizeof(attr)); + memset(&attr, 0, sizeof(attr)); attr.raw_tracepoint.name = ptr_to_u64(name); attr.raw_tracepoint.prog_fd = prog_fd; diff --git a/tools/lib/bpf/bpf.h b/tools/lib/bpf/bpf.h index ed09eed2dc3b..6ffdd79bea89 100644 --- a/tools/lib/bpf/bpf.h +++ b/tools/lib/bpf/bpf.h @@ -85,6 +85,7 @@ struct bpf_load_program_attr { __u32 line_info_rec_size; const void *line_info; __u32 line_info_cnt; + __u32 log_level; }; /* Flags to direct loading requirements */ diff --git a/tools/lib/bpf/btf.c b/tools/lib/bpf/btf.c index ab6528c935a1..68b50e9bbde1 100644 --- a/tools/lib/bpf/btf.c +++ b/tools/lib/bpf/btf.c @@ -16,7 +16,8 @@ #define max(a, b) ((a) > (b) ? (a) : (b)) #define min(a, b) ((a) < (b) ? (a) : (b)) -#define BTF_MAX_NR_TYPES 65535 +#define BTF_MAX_NR_TYPES 0x7fffffff +#define BTF_MAX_STR_OFFSET 0x7fffffff #define IS_MODIFIER(k) (((k) == BTF_KIND_TYPEDEF) || \ ((k) == BTF_KIND_VOLATILE) || \ @@ -41,9 +42,8 @@ struct btf { struct btf_ext_info { /* - * info points to a deep copy of the individual info section - * (e.g. func_info and line_info) from the .BTF.ext. - * It does not include the __u32 rec_size. + * info points to the individual info section (e.g. func_info and + * line_info) from the .BTF.ext. It does not include the __u32 rec_size. */ void *info; __u32 rec_size; @@ -51,8 +51,13 @@ struct btf_ext_info { }; struct btf_ext { + union { + struct btf_ext_header *hdr; + void *data; + }; struct btf_ext_info func_info; struct btf_ext_info line_info; + __u32 data_size; }; struct btf_ext_info_sec { @@ -171,7 +176,7 @@ static int btf_parse_str_sec(struct btf *btf) const char *start = btf->nohdr_data + hdr->str_off; const char *end = start + btf->hdr->str_len; - if (!hdr->str_len || hdr->str_len - 1 > BTF_MAX_NAME_OFFSET || + if (!hdr->str_len || hdr->str_len - 1 > BTF_MAX_STR_OFFSET || start[0] || end[-1]) { pr_debug("Invalid BTF string section\n"); return -EINVAL; @@ -366,8 +371,6 @@ void btf__free(struct btf *btf) struct btf *btf__new(__u8 *data, __u32 size) { - __u32 log_buf_size = 0; - char *log_buf = NULL; struct btf *btf; int err; @@ -377,15 +380,6 @@ struct btf *btf__new(__u8 *data, __u32 size) btf->fd = -1; - log_buf = malloc(BPF_LOG_BUF_SIZE); - if (!log_buf) { - err = -ENOMEM; - goto done; - } - - *log_buf = 0; - log_buf_size = BPF_LOG_BUF_SIZE; - btf->data = malloc(size); if (!btf->data) { err = -ENOMEM; @@ -395,17 +389,6 @@ struct btf *btf__new(__u8 *data, __u32 size) memcpy(btf->data, data, size); btf->data_size = size; - btf->fd = bpf_load_btf(btf->data, btf->data_size, - log_buf, log_buf_size, false); - - if (btf->fd == -1) { - err = -errno; - pr_warning("Error loading BTF: %s(%d)\n", strerror(errno), errno); - if (log_buf && *log_buf) - pr_warning("%s\n", log_buf); - goto done; - } - err = btf_parse_hdr(btf); if (err) goto done; @@ -417,8 +400,6 @@ struct btf *btf__new(__u8 *data, __u32 size) err = btf_parse_type_sec(btf); done: - free(log_buf); - if (err) { btf__free(btf); return ERR_PTR(err); @@ -427,16 +408,45 @@ done: return btf; } +int btf__load(struct btf *btf) +{ + __u32 log_buf_size = BPF_LOG_BUF_SIZE; + char *log_buf = NULL; + int err = 0; + + if (btf->fd >= 0) + return -EEXIST; + + log_buf = malloc(log_buf_size); + if (!log_buf) + return -ENOMEM; + + *log_buf = 0; + + btf->fd = bpf_load_btf(btf->data, btf->data_size, + log_buf, log_buf_size, false); + if (btf->fd < 0) { + err = -errno; + pr_warning("Error loading BTF: %s(%d)\n", strerror(errno), errno); + if (*log_buf) + pr_warning("%s\n", log_buf); + goto done; + } + +done: + free(log_buf); + return err; +} + int btf__fd(const struct btf *btf) { return btf->fd; } -void btf__get_strings(const struct btf *btf, const char **strings, - __u32 *str_len) +const void *btf__get_raw_data(const struct btf *btf, __u32 *size) { - *strings = btf->strings; - *str_len = btf->hdr->str_len; + *size = btf->data_size; + return btf->data; } const char *btf__name_by_offset(const struct btf *btf, __u32 offset) @@ -474,7 +484,7 @@ int btf__get_from_id(__u32 id, struct btf **btf) goto exit_free; } - bzero(ptr, last_size); + memset(ptr, 0, last_size); btf_info.btf = ptr_to_u64(ptr); err = bpf_obj_get_info_by_fd(btf_fd, &btf_info, &len); @@ -488,7 +498,7 @@ int btf__get_from_id(__u32 id, struct btf **btf) goto exit_free; } ptr = temp_ptr; - bzero(ptr, last_size); + memset(ptr, 0, last_size); btf_info.btf = ptr_to_u64(ptr); err = bpf_obj_get_info_by_fd(btf_fd, &btf_info, &len); } @@ -583,7 +593,7 @@ int btf__get_map_kv_tids(const struct btf *btf, const char *map_name, return 0; } -struct btf_ext_sec_copy_param { +struct btf_ext_sec_setup_param { __u32 off; __u32 len; __u32 min_rec_size; @@ -591,20 +601,14 @@ struct btf_ext_sec_copy_param { const char *desc; }; -static int btf_ext_copy_info(struct btf_ext *btf_ext, - __u8 *data, __u32 data_size, - struct btf_ext_sec_copy_param *ext_sec) +static int btf_ext_setup_info(struct btf_ext *btf_ext, + struct btf_ext_sec_setup_param *ext_sec) { - const struct btf_ext_header *hdr = (struct btf_ext_header *)data; const struct btf_ext_info_sec *sinfo; struct btf_ext_info *ext_info; __u32 info_left, record_size; /* The start of the info sec (including the __u32 record_size). */ - const void *info; - - /* data and data_size do not include btf_ext_header from now on */ - data = data + hdr->hdr_len; - data_size -= hdr->hdr_len; + void *info; if (ext_sec->off & 0x03) { pr_debug(".BTF.ext %s section is not aligned to 4 bytes\n", @@ -612,16 +616,15 @@ static int btf_ext_copy_info(struct btf_ext *btf_ext, return -EINVAL; } - if (data_size < ext_sec->off || - ext_sec->len > data_size - ext_sec->off) { + info = btf_ext->data + btf_ext->hdr->hdr_len + ext_sec->off; + info_left = ext_sec->len; + + if (btf_ext->data + btf_ext->data_size < info + ext_sec->len) { pr_debug("%s section (off:%u len:%u) is beyond the end of the ELF section .BTF.ext\n", - ext_sec->desc, ext_sec->off, ext_sec->len); + ext_sec->desc, ext_sec->off, ext_sec->len); return -EINVAL; } - info = data + ext_sec->off; - info_left = ext_sec->len; - /* At least a record size */ if (info_left < sizeof(__u32)) { pr_debug(".BTF.ext %s record size not found\n", ext_sec->desc); @@ -633,7 +636,7 @@ static int btf_ext_copy_info(struct btf_ext *btf_ext, if (record_size < ext_sec->min_rec_size || record_size & 0x03) { pr_debug("%s section in .BTF.ext has invalid record size %u\n", - ext_sec->desc, record_size); + ext_sec->desc, record_size); return -EINVAL; } @@ -679,42 +682,35 @@ static int btf_ext_copy_info(struct btf_ext *btf_ext, ext_info = ext_sec->ext_info; ext_info->len = ext_sec->len - sizeof(__u32); ext_info->rec_size = record_size; - ext_info->info = malloc(ext_info->len); - if (!ext_info->info) - return -ENOMEM; - memcpy(ext_info->info, info + sizeof(__u32), ext_info->len); + ext_info->info = info + sizeof(__u32); return 0; } -static int btf_ext_copy_func_info(struct btf_ext *btf_ext, - __u8 *data, __u32 data_size) +static int btf_ext_setup_func_info(struct btf_ext *btf_ext) { - const struct btf_ext_header *hdr = (struct btf_ext_header *)data; - struct btf_ext_sec_copy_param param = { - .off = hdr->func_info_off, - .len = hdr->func_info_len, + struct btf_ext_sec_setup_param param = { + .off = btf_ext->hdr->func_info_off, + .len = btf_ext->hdr->func_info_len, .min_rec_size = sizeof(struct bpf_func_info_min), .ext_info = &btf_ext->func_info, .desc = "func_info" }; - return btf_ext_copy_info(btf_ext, data, data_size, ¶m); + return btf_ext_setup_info(btf_ext, ¶m); } -static int btf_ext_copy_line_info(struct btf_ext *btf_ext, - __u8 *data, __u32 data_size) +static int btf_ext_setup_line_info(struct btf_ext *btf_ext) { - const struct btf_ext_header *hdr = (struct btf_ext_header *)data; - struct btf_ext_sec_copy_param param = { - .off = hdr->line_info_off, - .len = hdr->line_info_len, + struct btf_ext_sec_setup_param param = { + .off = btf_ext->hdr->line_info_off, + .len = btf_ext->hdr->line_info_len, .min_rec_size = sizeof(struct bpf_line_info_min), .ext_info = &btf_ext->line_info, .desc = "line_info", }; - return btf_ext_copy_info(btf_ext, data, data_size, ¶m); + return btf_ext_setup_info(btf_ext, ¶m); } static int btf_ext_parse_hdr(__u8 *data, __u32 data_size) @@ -754,9 +750,7 @@ void btf_ext__free(struct btf_ext *btf_ext) { if (!btf_ext) return; - - free(btf_ext->func_info.info); - free(btf_ext->line_info.info); + free(btf_ext->data); free(btf_ext); } @@ -773,13 +767,23 @@ struct btf_ext *btf_ext__new(__u8 *data, __u32 size) if (!btf_ext) return ERR_PTR(-ENOMEM); - err = btf_ext_copy_func_info(btf_ext, data, size); - if (err) { - btf_ext__free(btf_ext); - return ERR_PTR(err); + btf_ext->data_size = size; + btf_ext->data = malloc(size); + if (!btf_ext->data) { + err = -ENOMEM; + goto done; } + memcpy(btf_ext->data, data, size); - err = btf_ext_copy_line_info(btf_ext, data, size); + err = btf_ext_setup_func_info(btf_ext); + if (err) + goto done; + + err = btf_ext_setup_line_info(btf_ext); + if (err) + goto done; + +done: if (err) { btf_ext__free(btf_ext); return ERR_PTR(err); @@ -788,6 +792,12 @@ struct btf_ext *btf_ext__new(__u8 *data, __u32 size) return btf_ext; } +const void *btf_ext__get_raw_data(const struct btf_ext *btf_ext, __u32 *size) +{ + *size = btf_ext->data_size; + return btf_ext->data; +} + static int btf_ext_reloc_info(const struct btf *btf, const struct btf_ext_info *ext_info, const char *sec_name, __u32 insns_cnt, @@ -836,7 +846,8 @@ static int btf_ext_reloc_info(const struct btf *btf, return -ENOENT; } -int btf_ext__reloc_func_info(const struct btf *btf, const struct btf_ext *btf_ext, +int btf_ext__reloc_func_info(const struct btf *btf, + const struct btf_ext *btf_ext, const char *sec_name, __u32 insns_cnt, void **func_info, __u32 *cnt) { @@ -844,7 +855,8 @@ int btf_ext__reloc_func_info(const struct btf *btf, const struct btf_ext *btf_ex insns_cnt, func_info, cnt); } -int btf_ext__reloc_line_info(const struct btf *btf, const struct btf_ext *btf_ext, +int btf_ext__reloc_line_info(const struct btf *btf, + const struct btf_ext *btf_ext, const char *sec_name, __u32 insns_cnt, void **line_info, __u32 *cnt) { @@ -1871,7 +1883,7 @@ static int btf_dedup_prim_types(struct btf_dedup *d) */ static inline bool is_type_mapped(struct btf_dedup *d, uint32_t type_id) { - return d->map[type_id] <= BTF_MAX_TYPE; + return d->map[type_id] <= BTF_MAX_NR_TYPES; } /* @@ -2022,7 +2034,7 @@ static int btf_dedup_is_equiv(struct btf_dedup *d, __u32 cand_id, canon_id = resolve_fwd_id(d, canon_id); hypot_type_id = d->hypot_map[canon_id]; - if (hypot_type_id <= BTF_MAX_TYPE) + if (hypot_type_id <= BTF_MAX_NR_TYPES) return hypot_type_id == cand_id; if (btf_dedup_hypot_map_add(d, canon_id, cand_id)) @@ -2241,7 +2253,7 @@ static int btf_dedup_struct_type(struct btf_dedup *d, __u32 type_id) __u32 h; /* already deduped or is in process of deduping (loop detected) */ - if (d->map[type_id] <= BTF_MAX_TYPE) + if (d->map[type_id] <= BTF_MAX_NR_TYPES) return 0; t = d->btf->types[type_id]; @@ -2318,7 +2330,7 @@ static int btf_dedup_ref_type(struct btf_dedup *d, __u32 type_id) if (d->map[type_id] == BTF_IN_PROGRESS_ID) return -ELOOP; - if (d->map[type_id] <= BTF_MAX_TYPE) + if (d->map[type_id] <= BTF_MAX_NR_TYPES) return resolve_type_id(d, type_id); t = d->btf->types[type_id]; @@ -2498,7 +2510,7 @@ static int btf_dedup_remap_type_id(struct btf_dedup *d, __u32 type_id) resolved_type_id = resolve_type_id(d, type_id); new_type_id = d->hypot_map[resolved_type_id]; - if (new_type_id > BTF_MAX_TYPE) + if (new_type_id > BTF_MAX_NR_TYPES) return -EINVAL; return new_type_id; } diff --git a/tools/lib/bpf/btf.h b/tools/lib/bpf/btf.h index b393da90cc85..94bbc249b0f1 100644 --- a/tools/lib/bpf/btf.h +++ b/tools/lib/bpf/btf.h @@ -57,6 +57,7 @@ struct btf_ext_header { LIBBPF_API void btf__free(struct btf *btf); LIBBPF_API struct btf *btf__new(__u8 *data, __u32 size); +LIBBPF_API int btf__load(struct btf *btf); LIBBPF_API __s32 btf__find_by_name(const struct btf *btf, const char *type_name); LIBBPF_API __u32 btf__get_nr_types(const struct btf *btf); @@ -65,8 +66,7 @@ LIBBPF_API const struct btf_type *btf__type_by_id(const struct btf *btf, LIBBPF_API __s64 btf__resolve_size(const struct btf *btf, __u32 type_id); LIBBPF_API int btf__resolve_type(const struct btf *btf, __u32 type_id); LIBBPF_API int btf__fd(const struct btf *btf); -LIBBPF_API void btf__get_strings(const struct btf *btf, const char **strings, - __u32 *str_len); +LIBBPF_API const void *btf__get_raw_data(const struct btf *btf, __u32 *size); LIBBPF_API const char *btf__name_by_offset(const struct btf *btf, __u32 offset); LIBBPF_API int btf__get_from_id(__u32 id, struct btf **btf); LIBBPF_API int btf__get_map_kv_tids(const struct btf *btf, const char *map_name, @@ -76,6 +76,8 @@ LIBBPF_API int btf__get_map_kv_tids(const struct btf *btf, const char *map_name, LIBBPF_API struct btf_ext *btf_ext__new(__u8 *data, __u32 size); LIBBPF_API void btf_ext__free(struct btf_ext *btf_ext); +LIBBPF_API const void *btf_ext__get_raw_data(const struct btf_ext* btf_ext, + __u32 *size); LIBBPF_API int btf_ext__reloc_func_info(const struct btf *btf, const struct btf_ext *btf_ext, const char *sec_name, __u32 insns_cnt, diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c index 47969aa0faf8..b38dcbe7460a 100644 --- a/tools/lib/bpf/libbpf.c +++ b/tools/lib/bpf/libbpf.c @@ -307,7 +307,7 @@ bpf_program__init(void *data, size_t size, char *section_name, int idx, return -EINVAL; } - bzero(prog, sizeof(*prog)); + memset(prog, 0, sizeof(*prog)); prog->section_name = strdup(section_name); if (!prog->section_name) { @@ -835,7 +835,7 @@ static int bpf_object__elf_collect(struct bpf_object *obj, int flags) obj->efile.maps_shndx = idx; else if (strcmp(name, BTF_ELF_SEC) == 0) { obj->btf = btf__new(data->d_buf, data->d_size); - if (IS_ERR(obj->btf)) { + if (IS_ERR(obj->btf) || btf__load(obj->btf)) { pr_warning("Error loading ELF section %s: %ld. Ignored and continue.\n", BTF_ELF_SEC, PTR_ERR(obj->btf)); obj->btf = NULL; @@ -1113,6 +1113,20 @@ err_free_new_name: return -errno; } +int bpf_map__resize(struct bpf_map *map, __u32 max_entries) +{ + if (!map || !max_entries) + return -EINVAL; + + /* If map already created, its attributes can't be changed. */ + if (map->fd >= 0) + return -EBUSY; + + map->def.max_entries = max_entries; + + return 0; +} + static int bpf_object__probe_name(struct bpf_object *obj) { @@ -1576,7 +1590,7 @@ bpf_program__load(struct bpf_program *prog, struct bpf_prog_prep_result result; bpf_program_prep_t preprocessor = prog->preprocessor; - bzero(&result, sizeof(result)); + memset(&result, 0, sizeof(result)); err = preprocessor(prog, i, prog->insns, prog->insns_cnt, &result); if (err) { @@ -2317,6 +2331,11 @@ unsigned int bpf_object__kversion(struct bpf_object *obj) return obj ? obj->kern_version : 0; } +struct btf *bpf_object__btf(struct bpf_object *obj) +{ + return obj ? obj->btf : NULL; +} + int bpf_object__btf_fd(const struct bpf_object *obj) { return obj->btf ? btf__fd(obj->btf) : -1; diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h index 69a7c25eaccc..6c0168f8bba5 100644 --- a/tools/lib/bpf/libbpf.h +++ b/tools/lib/bpf/libbpf.h @@ -89,6 +89,9 @@ LIBBPF_API int bpf_object__load(struct bpf_object *obj); LIBBPF_API int bpf_object__unload(struct bpf_object *obj); LIBBPF_API const char *bpf_object__name(struct bpf_object *obj); LIBBPF_API unsigned int bpf_object__kversion(struct bpf_object *obj); + +struct btf; +LIBBPF_API struct btf *bpf_object__btf(struct bpf_object *obj); LIBBPF_API int bpf_object__btf_fd(const struct bpf_object *obj); LIBBPF_API struct bpf_program * @@ -294,6 +297,7 @@ LIBBPF_API int bpf_map__set_priv(struct bpf_map *map, void *priv, bpf_map_clear_priv_t clear_priv); LIBBPF_API void *bpf_map__priv(struct bpf_map *map); LIBBPF_API int bpf_map__reuse_fd(struct bpf_map *map, int fd); +LIBBPF_API int bpf_map__resize(struct bpf_map *map, __u32 max_entries); LIBBPF_API bool bpf_map__is_offload_neutral(struct bpf_map *map); LIBBPF_API void bpf_map__set_ifindex(struct bpf_map *map, __u32 ifindex); LIBBPF_API int bpf_map__pin(struct bpf_map *map, const char *path); diff --git a/tools/lib/bpf/libbpf.map b/tools/lib/bpf/libbpf.map index 89c1149e32ee..99dfa710c818 100644 --- a/tools/lib/bpf/libbpf.map +++ b/tools/lib/bpf/libbpf.map @@ -130,15 +130,19 @@ LIBBPF_0.0.2 { bpf_probe_helper; bpf_probe_map_type; bpf_probe_prog_type; + bpf_map__resize; bpf_map_lookup_elem_flags; + bpf_object__btf; bpf_object__find_map_fd_by_name; bpf_get_link_xdp_id; btf__dedup; btf__get_map_kv_tids; btf__get_nr_types; - btf__get_strings; + btf__get_raw_data; + btf__load; btf_ext__free; btf_ext__func_info_rec_size; + btf_ext__get_raw_data; btf_ext__line_info_rec_size; btf_ext__new; btf_ext__reloc_func_info; |