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bpf: Set map_btf_{name, id} for all map types

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Set map_btf_name and map_btf_id for all map types so that map fields can
be accessed by bpf programs.

Signed-off-by: Andrey Ignatov <rdna@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Link: https://lore.kernel.org/bpf/a825f808f22af52b018dbe82f1c7d29dab5fc978.1592600985.git.rdna@fb.com
This commit is contained in:
Andrey Ignatov 2020-06-19 14:11:44 -07:00 committed by Daniel Borkmann
parent 41c48f3a98
commit 2872e9ac33
14 changed files with 72 additions and 0 deletions
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15
kernel/bpf/arraymap.c
View File

@ -515,6 +515,7 @@ const struct bpf_map_ops array_map_ops = {
.map_btf_id = &array_map_btf_id,
};
static int percpu_array_map_btf_id;
const struct bpf_map_ops percpu_array_map_ops = {
.map_alloc_check = array_map_alloc_check,
.map_alloc = array_map_alloc,
@ -525,6 +526,8 @@ const struct bpf_map_ops percpu_array_map_ops = {
.map_delete_elem = array_map_delete_elem,
.map_seq_show_elem = percpu_array_map_seq_show_elem,
.map_check_btf = array_map_check_btf,
.map_btf_name = "bpf_array",
.map_btf_id = &percpu_array_map_btf_id,
};
static int fd_array_map_alloc_check(union bpf_attr *attr)
@ -871,6 +874,7 @@ static void prog_array_map_free(struct bpf_map *map)
fd_array_map_free(map);
}
static int prog_array_map_btf_id;
const struct bpf_map_ops prog_array_map_ops = {
.map_alloc_check = fd_array_map_alloc_check,
.map_alloc = prog_array_map_alloc,
@ -886,6 +890,8 @@ const struct bpf_map_ops prog_array_map_ops = {
.map_fd_sys_lookup_elem = prog_fd_array_sys_lookup_elem,
.map_release_uref = prog_array_map_clear,
.map_seq_show_elem = prog_array_map_seq_show_elem,
.map_btf_name = "bpf_array",
.map_btf_id = &prog_array_map_btf_id,
};
static struct bpf_event_entry *bpf_event_entry_gen(struct file *perf_file,
@ -964,6 +970,7 @@ static void perf_event_fd_array_release(struct bpf_map *map,
rcu_read_unlock();
}
static int perf_event_array_map_btf_id;
const struct bpf_map_ops perf_event_array_map_ops = {
.map_alloc_check = fd_array_map_alloc_check,
.map_alloc = array_map_alloc,
@ -975,6 +982,8 @@ const struct bpf_map_ops perf_event_array_map_ops = {
.map_fd_put_ptr = perf_event_fd_array_put_ptr,
.map_release = perf_event_fd_array_release,
.map_check_btf = map_check_no_btf,
.map_btf_name = "bpf_array",
.map_btf_id = &perf_event_array_map_btf_id,
};
#ifdef CONFIG_CGROUPS
@ -997,6 +1006,7 @@ static void cgroup_fd_array_free(struct bpf_map *map)
fd_array_map_free(map);
}
static int cgroup_array_map_btf_id;
const struct bpf_map_ops cgroup_array_map_ops = {
.map_alloc_check = fd_array_map_alloc_check,
.map_alloc = array_map_alloc,
@ -1007,6 +1017,8 @@ const struct bpf_map_ops cgroup_array_map_ops = {
.map_fd_get_ptr = cgroup_fd_array_get_ptr,
.map_fd_put_ptr = cgroup_fd_array_put_ptr,
.map_check_btf = map_check_no_btf,
.map_btf_name = "bpf_array",
.map_btf_id = &cgroup_array_map_btf_id,
};
#endif
@ -1080,6 +1092,7 @@ static u32 array_of_map_gen_lookup(struct bpf_map *map,
return insn - insn_buf;
}
static int array_of_maps_map_btf_id;
const struct bpf_map_ops array_of_maps_map_ops = {
.map_alloc_check = fd_array_map_alloc_check,
.map_alloc = array_of_map_alloc,
@ -1092,4 +1105,6 @@ const struct bpf_map_ops array_of_maps_map_ops = {
.map_fd_sys_lookup_elem = bpf_map_fd_sys_lookup_elem,
.map_gen_lookup = array_of_map_gen_lookup,
.map_check_btf = map_check_no_btf,
.map_btf_name = "bpf_array",
.map_btf_id = &array_of_maps_map_btf_id,
};

3
kernel/bpf/bpf_struct_ops.c
View File

@ -611,6 +611,7 @@ static struct bpf_map *bpf_struct_ops_map_alloc(union bpf_attr *attr)
return map;
}
static int bpf_struct_ops_map_btf_id;
const struct bpf_map_ops bpf_struct_ops_map_ops = {
.map_alloc_check = bpf_struct_ops_map_alloc_check,
.map_alloc = bpf_struct_ops_map_alloc,
@ -620,6 +621,8 @@ const struct bpf_map_ops bpf_struct_ops_map_ops = {
.map_delete_elem = bpf_struct_ops_map_delete_elem,
.map_update_elem = bpf_struct_ops_map_update_elem,
.map_seq_show_elem = bpf_struct_ops_map_seq_show_elem,
.map_btf_name = "bpf_struct_ops_map",
.map_btf_id = &bpf_struct_ops_map_btf_id,
};
/* "const void *" because some subsystem is

3
kernel/bpf/cpumap.c
View File

@ -543,6 +543,7 @@ static int cpu_map_get_next_key(struct bpf_map *map, void *key, void *next_key)
return 0;
}
static int cpu_map_btf_id;
const struct bpf_map_ops cpu_map_ops = {
.map_alloc = cpu_map_alloc,
.map_free = cpu_map_free,
@ -551,6 +552,8 @@ const struct bpf_map_ops cpu_map_ops = {
.map_lookup_elem = cpu_map_lookup_elem,
.map_get_next_key = cpu_map_get_next_key,
.map_check_btf = map_check_no_btf,
.map_btf_name = "bpf_cpu_map",
.map_btf_id = &cpu_map_btf_id,
};
static int bq_flush_to_queue(struct xdp_bulk_queue *bq)

6
kernel/bpf/devmap.c
View File

@ -747,6 +747,7 @@ static int dev_map_hash_update_elem(struct bpf_map *map, void *key, void *value,
map, key, value, map_flags);
}
static int dev_map_btf_id;
const struct bpf_map_ops dev_map_ops = {
.map_alloc = dev_map_alloc,
.map_free = dev_map_free,
@ -755,8 +756,11 @@ const struct bpf_map_ops dev_map_ops = {
.map_update_elem = dev_map_update_elem,
.map_delete_elem = dev_map_delete_elem,
.map_check_btf = map_check_no_btf,
.map_btf_name = "bpf_dtab",
.map_btf_id = &dev_map_btf_id,
};
static int dev_map_hash_map_btf_id;
const struct bpf_map_ops dev_map_hash_ops = {
.map_alloc = dev_map_alloc,
.map_free = dev_map_free,
@ -765,6 +769,8 @@ const struct bpf_map_ops dev_map_hash_ops = {
.map_update_elem = dev_map_hash_update_elem,
.map_delete_elem = dev_map_hash_delete_elem,
.map_check_btf = map_check_no_btf,
.map_btf_name = "bpf_dtab",
.map_btf_id = &dev_map_hash_map_btf_id,
};
static void dev_map_hash_remove_netdev(struct bpf_dtab *dtab,

12
kernel/bpf/hashtab.c
View File

@ -1630,6 +1630,7 @@ const struct bpf_map_ops htab_map_ops = {
.map_btf_id = &htab_map_btf_id,
};
static int htab_lru_map_btf_id;
const struct bpf_map_ops htab_lru_map_ops = {
.map_alloc_check = htab_map_alloc_check,
.map_alloc = htab_map_alloc,
@ -1642,6 +1643,8 @@ const struct bpf_map_ops htab_lru_map_ops = {
.map_gen_lookup = htab_lru_map_gen_lookup,
.map_seq_show_elem = htab_map_seq_show_elem,
BATCH_OPS(htab_lru),
.map_btf_name = "bpf_htab",
.map_btf_id = &htab_lru_map_btf_id,
};
/* Called from eBPF program */
@ -1746,6 +1749,7 @@ static void htab_percpu_map_seq_show_elem(struct bpf_map *map, void *key,
rcu_read_unlock();
}
static int htab_percpu_map_btf_id;
const struct bpf_map_ops htab_percpu_map_ops = {
.map_alloc_check = htab_map_alloc_check,
.map_alloc = htab_map_alloc,
@ -1756,8 +1760,11 @@ const struct bpf_map_ops htab_percpu_map_ops = {
.map_delete_elem = htab_map_delete_elem,
.map_seq_show_elem = htab_percpu_map_seq_show_elem,
BATCH_OPS(htab_percpu),
.map_btf_name = "bpf_htab",
.map_btf_id = &htab_percpu_map_btf_id,
};
static int htab_lru_percpu_map_btf_id;
const struct bpf_map_ops htab_lru_percpu_map_ops = {
.map_alloc_check = htab_map_alloc_check,
.map_alloc = htab_map_alloc,
@ -1768,6 +1775,8 @@ const struct bpf_map_ops htab_lru_percpu_map_ops = {
.map_delete_elem = htab_lru_map_delete_elem,
.map_seq_show_elem = htab_percpu_map_seq_show_elem,
BATCH_OPS(htab_lru_percpu),
.map_btf_name = "bpf_htab",
.map_btf_id = &htab_lru_percpu_map_btf_id,
};
static int fd_htab_map_alloc_check(union bpf_attr *attr)
@ -1890,6 +1899,7 @@ static void htab_of_map_free(struct bpf_map *map)
fd_htab_map_free(map);
}
static int htab_of_maps_map_btf_id;
const struct bpf_map_ops htab_of_maps_map_ops = {
.map_alloc_check = fd_htab_map_alloc_check,
.map_alloc = htab_of_map_alloc,
@ -1902,4 +1912,6 @@ const struct bpf_map_ops htab_of_maps_map_ops = {
.map_fd_sys_lookup_elem = bpf_map_fd_sys_lookup_elem,
.map_gen_lookup = htab_of_map_gen_lookup,
.map_check_btf = map_check_no_btf,
.map_btf_name = "bpf_htab",
.map_btf_id = &htab_of_maps_map_btf_id,
};

3
kernel/bpf/local_storage.c
View File

@ -409,6 +409,7 @@ static void cgroup_storage_seq_show_elem(struct bpf_map *map, void *_key,
rcu_read_unlock();
}
static int cgroup_storage_map_btf_id;
const struct bpf_map_ops cgroup_storage_map_ops = {
.map_alloc = cgroup_storage_map_alloc,
.map_free = cgroup_storage_map_free,
@ -418,6 +419,8 @@ const struct bpf_map_ops cgroup_storage_map_ops = {
.map_delete_elem = cgroup_storage_delete_elem,
.map_check_btf = cgroup_storage_check_btf,
.map_seq_show_elem = cgroup_storage_seq_show_elem,
.map_btf_name = "bpf_cgroup_storage_map",
.map_btf_id = &cgroup_storage_map_btf_id,
};
int bpf_cgroup_storage_assign(struct bpf_prog_aux *aux, struct bpf_map *_map)

3
kernel/bpf/lpm_trie.c
View File

@ -735,6 +735,7 @@ static int trie_check_btf(const struct bpf_map *map,
-EINVAL : 0;
}
static int trie_map_btf_id;
const struct bpf_map_ops trie_map_ops = {
.map_alloc = trie_alloc,
.map_free = trie_free,
@ -743,4 +744,6 @@ const struct bpf_map_ops trie_map_ops = {
.map_update_elem = trie_update_elem,
.map_delete_elem = trie_delete_elem,
.map_check_btf = trie_check_btf,
.map_btf_name = "lpm_trie",
.map_btf_id = &trie_map_btf_id,
};

6
kernel/bpf/queue_stack_maps.c
View File

@ -262,6 +262,7 @@ static int queue_stack_map_get_next_key(struct bpf_map *map, void *key,
return -EINVAL;
}
static int queue_map_btf_id;
const struct bpf_map_ops queue_map_ops = {
.map_alloc_check = queue_stack_map_alloc_check,
.map_alloc = queue_stack_map_alloc,
@ -273,8 +274,11 @@ const struct bpf_map_ops queue_map_ops = {
.map_pop_elem = queue_map_pop_elem,
.map_peek_elem = queue_map_peek_elem,
.map_get_next_key = queue_stack_map_get_next_key,
.map_btf_name = "bpf_queue_stack",
.map_btf_id = &queue_map_btf_id,
};
static int stack_map_btf_id;
const struct bpf_map_ops stack_map_ops = {
.map_alloc_check = queue_stack_map_alloc_check,
.map_alloc = queue_stack_map_alloc,
@ -286,4 +290,6 @@ const struct bpf_map_ops stack_map_ops = {
.map_pop_elem = stack_map_pop_elem,
.map_peek_elem = stack_map_peek_elem,
.map_get_next_key = queue_stack_map_get_next_key,
.map_btf_name = "bpf_queue_stack",
.map_btf_id = &stack_map_btf_id,
};

3
kernel/bpf/reuseport_array.c
View File

@ -345,6 +345,7 @@ static int reuseport_array_get_next_key(struct bpf_map *map, void *key,
return 0;
}
static int reuseport_array_map_btf_id;
const struct bpf_map_ops reuseport_array_ops = {
.map_alloc_check = reuseport_array_alloc_check,
.map_alloc = reuseport_array_alloc,
@ -352,4 +353,6 @@ const struct bpf_map_ops reuseport_array_ops = {
.map_lookup_elem = reuseport_array_lookup_elem,
.map_get_next_key = reuseport_array_get_next_key,
.map_delete_elem = reuseport_array_delete_elem,
.map_btf_name = "reuseport_array",
.map_btf_id = &reuseport_array_map_btf_id,
};

3
kernel/bpf/ringbuf.c
View File

@ -294,6 +294,7 @@ static __poll_t ringbuf_map_poll(struct bpf_map *map, struct file *filp,
return 0;
}
static int ringbuf_map_btf_id;
const struct bpf_map_ops ringbuf_map_ops = {
.map_alloc = ringbuf_map_alloc,
.map_free = ringbuf_map_free,
@ -303,6 +304,8 @@ const struct bpf_map_ops ringbuf_map_ops = {
.map_update_elem = ringbuf_map_update_elem,
.map_delete_elem = ringbuf_map_delete_elem,
.map_get_next_key = ringbuf_map_get_next_key,
.map_btf_name = "bpf_ringbuf_map",
.map_btf_id = &ringbuf_map_btf_id,
};
/* Given pointer to ring buffer record metadata and struct bpf_ringbuf itself,

3
kernel/bpf/stackmap.c
View File

@ -613,6 +613,7 @@ static void stack_map_free(struct bpf_map *map)
put_callchain_buffers();
}
static int stack_trace_map_btf_id;
const struct bpf_map_ops stack_trace_map_ops = {
.map_alloc = stack_map_alloc,
.map_free = stack_map_free,
@ -621,6 +622,8 @@ const struct bpf_map_ops stack_trace_map_ops = {
.map_update_elem = stack_map_update_elem,
.map_delete_elem = stack_map_delete_elem,
.map_check_btf = map_check_no_btf,
.map_btf_name = "bpf_stack_map",
.map_btf_id = &stack_trace_map_btf_id,
};
static int __init stack_map_init(void)

3
net/core/bpf_sk_storage.c
View File

@ -919,6 +919,7 @@ BPF_CALL_2(bpf_sk_storage_delete, struct bpf_map *, map, struct sock *, sk)
return -ENOENT;
}
static int sk_storage_map_btf_id;
const struct bpf_map_ops sk_storage_map_ops = {
.map_alloc_check = bpf_sk_storage_map_alloc_check,
.map_alloc = bpf_sk_storage_map_alloc,
@ -928,6 +929,8 @@ const struct bpf_map_ops sk_storage_map_ops = {
.map_update_elem = bpf_fd_sk_storage_update_elem,
.map_delete_elem = bpf_fd_sk_storage_delete_elem,
.map_check_btf = bpf_sk_storage_map_check_btf,
.map_btf_name = "bpf_sk_storage_map",
.map_btf_id = &sk_storage_map_btf_id,
};
const struct bpf_func_proto bpf_sk_storage_get_proto = {

6
net/core/sock_map.c
View File

@ -643,6 +643,7 @@ const struct bpf_func_proto bpf_msg_redirect_map_proto = {
.arg4_type = ARG_ANYTHING,
};
static int sock_map_btf_id;
const struct bpf_map_ops sock_map_ops = {
.map_alloc = sock_map_alloc,
.map_free = sock_map_free,
@ -653,6 +654,8 @@ const struct bpf_map_ops sock_map_ops = {
.map_lookup_elem = sock_map_lookup,
.map_release_uref = sock_map_release_progs,
.map_check_btf = map_check_no_btf,
.map_btf_name = "bpf_stab",
.map_btf_id = &sock_map_btf_id,
};
struct bpf_shtab_elem {
@ -1176,6 +1179,7 @@ const struct bpf_func_proto bpf_msg_redirect_hash_proto = {
.arg4_type = ARG_ANYTHING,
};
static int sock_hash_map_btf_id;
const struct bpf_map_ops sock_hash_ops = {
.map_alloc = sock_hash_alloc,
.map_free = sock_hash_free,
@ -1186,6 +1190,8 @@ const struct bpf_map_ops sock_hash_ops = {
.map_lookup_elem_sys_only = sock_hash_lookup_sys,
.map_release_uref = sock_hash_release_progs,
.map_check_btf = map_check_no_btf,
.map_btf_name = "bpf_shtab",
.map_btf_id = &sock_hash_map_btf_id,
};
static struct sk_psock_progs *sock_map_progs(struct bpf_map *map)

3
net/xdp/xskmap.c
View File

@ -254,6 +254,7 @@ void xsk_map_try_sock_delete(struct xsk_map *map, struct xdp_sock *xs,
spin_unlock_bh(&map->lock);
}
static int xsk_map_btf_id;
const struct bpf_map_ops xsk_map_ops = {
.map_alloc = xsk_map_alloc,
.map_free = xsk_map_free,
@ -264,4 +265,6 @@ const struct bpf_map_ops xsk_map_ops = {
.map_update_elem = xsk_map_update_elem,
.map_delete_elem = xsk_map_delete_elem,
.map_check_btf = map_check_no_btf,
.map_btf_name = "xsk_map",
.map_btf_id = &xsk_map_btf_id,
};