1 /* Copyright (c) 2011-2014 PLUMgrid, http://plumgrid.com
3 * This program is free software; you can redistribute it and/or
4 * modify it under the terms of version 2 of the GNU General Public
5 * License as published by the Free Software Foundation.
7 * This program is distributed in the hope that it will be useful, but
8 * WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
10 * General Public License for more details.
12 #include <linux/bpf.h>
13 #include <linux/bpf_trace.h>
14 #include <linux/bpf_lirc.h>
15 #include <linux/btf.h>
16 #include <linux/syscalls.h>
17 #include <linux/slab.h>
18 #include <linux/sched/signal.h>
19 #include <linux/vmalloc.h>
20 #include <linux/mmzone.h>
21 #include <linux/anon_inodes.h>
22 #include <linux/fdtable.h>
23 #include <linux/file.h>
25 #include <linux/license.h>
26 #include <linux/filter.h>
27 #include <linux/version.h>
28 #include <linux/kernel.h>
29 #include <linux/idr.h>
30 #include <linux/cred.h>
31 #include <linux/timekeeping.h>
32 #include <linux/ctype.h>
33 #include <linux/nospec.h>
35 #define IS_FD_ARRAY(map) ((map)->map_type == BPF_MAP_TYPE_PROG_ARRAY || \
36 (map)->map_type == BPF_MAP_TYPE_PERF_EVENT_ARRAY || \
37 (map)->map_type == BPF_MAP_TYPE_CGROUP_ARRAY || \
38 (map)->map_type == BPF_MAP_TYPE_ARRAY_OF_MAPS)
39 #define IS_FD_HASH(map) ((map)->map_type == BPF_MAP_TYPE_HASH_OF_MAPS)
40 #define IS_FD_MAP(map) (IS_FD_ARRAY(map) || IS_FD_HASH(map))
42 #define BPF_OBJ_FLAG_MASK (BPF_F_RDONLY | BPF_F_WRONLY)
44 DEFINE_PER_CPU(int, bpf_prog_active);
45 static DEFINE_IDR(prog_idr);
46 static DEFINE_SPINLOCK(prog_idr_lock);
47 static DEFINE_IDR(map_idr);
48 static DEFINE_SPINLOCK(map_idr_lock);
50 int sysctl_unprivileged_bpf_disabled __read_mostly;
52 static const struct bpf_map_ops * const bpf_map_types[] = {
53 #define BPF_PROG_TYPE(_id, _ops)
54 #define BPF_MAP_TYPE(_id, _ops) \
56 #include <linux/bpf_types.h>
62 * If we're handed a bigger struct than we know of, ensure all the unknown bits
63 * are 0 - i.e. new user-space does not rely on any kernel feature extensions
64 * we don't know about yet.
66 * There is a ToCToU between this function call and the following
67 * copy_from_user() call. However, this is not a concern since this function is
68 * meant to be a future-proofing of bits.
70 int bpf_check_uarg_tail_zero(void __user *uaddr,
74 unsigned char __user *addr;
75 unsigned char __user *end;
79 if (unlikely(actual_size > PAGE_SIZE)) /* silly large */
82 if (unlikely(!access_ok(uaddr, actual_size)))
85 if (actual_size <= expected_size)
88 addr = uaddr + expected_size;
89 end = uaddr + actual_size;
91 for (; addr < end; addr++) {
92 err = get_user(val, addr);
102 const struct bpf_map_ops bpf_map_offload_ops = {
103 .map_alloc = bpf_map_offload_map_alloc,
104 .map_free = bpf_map_offload_map_free,
105 .map_check_btf = map_check_no_btf,
108 static struct bpf_map *find_and_alloc_map(union bpf_attr *attr)
110 const struct bpf_map_ops *ops;
111 u32 type = attr->map_type;
115 if (type >= ARRAY_SIZE(bpf_map_types))
116 return ERR_PTR(-EINVAL);
117 type = array_index_nospec(type, ARRAY_SIZE(bpf_map_types));
118 ops = bpf_map_types[type];
120 return ERR_PTR(-EINVAL);
122 if (ops->map_alloc_check) {
123 err = ops->map_alloc_check(attr);
127 if (attr->map_ifindex)
128 ops = &bpf_map_offload_ops;
129 map = ops->map_alloc(attr);
133 map->map_type = type;
137 void *bpf_map_area_alloc(size_t size, int numa_node)
139 /* We definitely need __GFP_NORETRY, so OOM killer doesn't
140 * trigger under memory pressure as we really just want to
143 const gfp_t flags = __GFP_NOWARN | __GFP_NORETRY | __GFP_ZERO;
146 if (size <= (PAGE_SIZE << PAGE_ALLOC_COSTLY_ORDER)) {
147 area = kmalloc_node(size, GFP_USER | flags, numa_node);
152 return __vmalloc_node_flags_caller(size, numa_node, GFP_KERNEL | flags,
153 __builtin_return_address(0));
156 void bpf_map_area_free(void *area)
161 void bpf_map_init_from_attr(struct bpf_map *map, union bpf_attr *attr)
163 map->map_type = attr->map_type;
164 map->key_size = attr->key_size;
165 map->value_size = attr->value_size;
166 map->max_entries = attr->max_entries;
167 map->map_flags = attr->map_flags;
168 map->numa_node = bpf_map_attr_numa_node(attr);
171 int bpf_map_precharge_memlock(u32 pages)
173 struct user_struct *user = get_current_user();
174 unsigned long memlock_limit, cur;
176 memlock_limit = rlimit(RLIMIT_MEMLOCK) >> PAGE_SHIFT;
177 cur = atomic_long_read(&user->locked_vm);
179 if (cur + pages > memlock_limit)
184 static int bpf_charge_memlock(struct user_struct *user, u32 pages)
186 unsigned long memlock_limit = rlimit(RLIMIT_MEMLOCK) >> PAGE_SHIFT;
188 if (atomic_long_add_return(pages, &user->locked_vm) > memlock_limit) {
189 atomic_long_sub(pages, &user->locked_vm);
195 static void bpf_uncharge_memlock(struct user_struct *user, u32 pages)
197 atomic_long_sub(pages, &user->locked_vm);
200 static int bpf_map_init_memlock(struct bpf_map *map)
202 struct user_struct *user = get_current_user();
205 ret = bpf_charge_memlock(user, map->pages);
214 static void bpf_map_release_memlock(struct bpf_map *map)
216 struct user_struct *user = map->user;
217 bpf_uncharge_memlock(user, map->pages);
221 int bpf_map_charge_memlock(struct bpf_map *map, u32 pages)
225 ret = bpf_charge_memlock(map->user, pages);
232 void bpf_map_uncharge_memlock(struct bpf_map *map, u32 pages)
234 bpf_uncharge_memlock(map->user, pages);
238 static int bpf_map_alloc_id(struct bpf_map *map)
242 idr_preload(GFP_KERNEL);
243 spin_lock_bh(&map_idr_lock);
244 id = idr_alloc_cyclic(&map_idr, map, 1, INT_MAX, GFP_ATOMIC);
247 spin_unlock_bh(&map_idr_lock);
250 if (WARN_ON_ONCE(!id))
253 return id > 0 ? 0 : id;
256 void bpf_map_free_id(struct bpf_map *map, bool do_idr_lock)
260 /* Offloaded maps are removed from the IDR store when their device
261 * disappears - even if someone holds an fd to them they are unusable,
262 * the memory is gone, all ops will fail; they are simply waiting for
263 * refcnt to drop to be freed.
269 spin_lock_irqsave(&map_idr_lock, flags);
271 __acquire(&map_idr_lock);
273 idr_remove(&map_idr, map->id);
277 spin_unlock_irqrestore(&map_idr_lock, flags);
279 __release(&map_idr_lock);
282 /* called from workqueue */
283 static void bpf_map_free_deferred(struct work_struct *work)
285 struct bpf_map *map = container_of(work, struct bpf_map, work);
287 bpf_map_release_memlock(map);
288 security_bpf_map_free(map);
289 /* implementation dependent freeing */
290 map->ops->map_free(map);
293 static void bpf_map_put_uref(struct bpf_map *map)
295 if (atomic_dec_and_test(&map->usercnt)) {
296 if (map->ops->map_release_uref)
297 map->ops->map_release_uref(map);
301 /* decrement map refcnt and schedule it for freeing via workqueue
302 * (unrelying map implementation ops->map_free() might sleep)
304 static void __bpf_map_put(struct bpf_map *map, bool do_idr_lock)
306 if (atomic_dec_and_test(&map->refcnt)) {
307 /* bpf_map_free_id() must be called first */
308 bpf_map_free_id(map, do_idr_lock);
310 INIT_WORK(&map->work, bpf_map_free_deferred);
311 schedule_work(&map->work);
315 void bpf_map_put(struct bpf_map *map)
317 __bpf_map_put(map, true);
319 EXPORT_SYMBOL_GPL(bpf_map_put);
321 void bpf_map_put_with_uref(struct bpf_map *map)
323 bpf_map_put_uref(map);
327 static int bpf_map_release(struct inode *inode, struct file *filp)
329 struct bpf_map *map = filp->private_data;
331 if (map->ops->map_release)
332 map->ops->map_release(map, filp);
334 bpf_map_put_with_uref(map);
338 #ifdef CONFIG_PROC_FS
339 static void bpf_map_show_fdinfo(struct seq_file *m, struct file *filp)
341 const struct bpf_map *map = filp->private_data;
342 const struct bpf_array *array;
343 u32 owner_prog_type = 0;
346 if (map->map_type == BPF_MAP_TYPE_PROG_ARRAY) {
347 array = container_of(map, struct bpf_array, map);
348 owner_prog_type = array->owner_prog_type;
349 owner_jited = array->owner_jited;
365 map->pages * 1ULL << PAGE_SHIFT,
368 if (owner_prog_type) {
369 seq_printf(m, "owner_prog_type:\t%u\n",
371 seq_printf(m, "owner_jited:\t%u\n",
377 static ssize_t bpf_dummy_read(struct file *filp, char __user *buf, size_t siz,
380 /* We need this handler such that alloc_file() enables
381 * f_mode with FMODE_CAN_READ.
386 static ssize_t bpf_dummy_write(struct file *filp, const char __user *buf,
387 size_t siz, loff_t *ppos)
389 /* We need this handler such that alloc_file() enables
390 * f_mode with FMODE_CAN_WRITE.
395 const struct file_operations bpf_map_fops = {
396 #ifdef CONFIG_PROC_FS
397 .show_fdinfo = bpf_map_show_fdinfo,
399 .release = bpf_map_release,
400 .read = bpf_dummy_read,
401 .write = bpf_dummy_write,
404 int bpf_map_new_fd(struct bpf_map *map, int flags)
408 ret = security_bpf_map(map, OPEN_FMODE(flags));
412 return anon_inode_getfd("bpf-map", &bpf_map_fops, map,
416 int bpf_get_file_flag(int flags)
418 if ((flags & BPF_F_RDONLY) && (flags & BPF_F_WRONLY))
420 if (flags & BPF_F_RDONLY)
422 if (flags & BPF_F_WRONLY)
427 /* helper macro to check that unused fields 'union bpf_attr' are zero */
428 #define CHECK_ATTR(CMD) \
429 memchr_inv((void *) &attr->CMD##_LAST_FIELD + \
430 sizeof(attr->CMD##_LAST_FIELD), 0, \
432 offsetof(union bpf_attr, CMD##_LAST_FIELD) - \
433 sizeof(attr->CMD##_LAST_FIELD)) != NULL
435 /* dst and src must have at least BPF_OBJ_NAME_LEN number of bytes.
436 * Return 0 on success and < 0 on error.
438 static int bpf_obj_name_cpy(char *dst, const char *src)
440 const char *end = src + BPF_OBJ_NAME_LEN;
442 memset(dst, 0, BPF_OBJ_NAME_LEN);
444 /* Copy all isalnum() and '_' char */
445 while (src < end && *src) {
446 if (!isalnum(*src) && *src != '_')
451 /* No '\0' found in BPF_OBJ_NAME_LEN number of bytes */
458 int map_check_no_btf(const struct bpf_map *map,
459 const struct btf *btf,
460 const struct btf_type *key_type,
461 const struct btf_type *value_type)
466 static int map_check_btf(struct bpf_map *map, const struct btf *btf,
467 u32 btf_key_id, u32 btf_value_id)
469 const struct btf_type *key_type, *value_type;
470 u32 key_size, value_size;
473 key_type = btf_type_id_size(btf, &btf_key_id, &key_size);
474 if (!key_type || key_size != map->key_size)
477 value_type = btf_type_id_size(btf, &btf_value_id, &value_size);
478 if (!value_type || value_size != map->value_size)
481 map->spin_lock_off = btf_find_spin_lock(btf, value_type);
483 if (map_value_has_spin_lock(map)) {
484 if (map->map_type != BPF_MAP_TYPE_HASH &&
485 map->map_type != BPF_MAP_TYPE_ARRAY &&
486 map->map_type != BPF_MAP_TYPE_CGROUP_STORAGE)
488 if (map->spin_lock_off + sizeof(struct bpf_spin_lock) >
491 "verifier bug spin_lock_off %d value_size %d\n",
492 map->spin_lock_off, map->value_size);
497 if (map->ops->map_check_btf)
498 ret = map->ops->map_check_btf(map, btf, key_type, value_type);
503 #define BPF_MAP_CREATE_LAST_FIELD btf_value_type_id
504 /* called via syscall */
505 static int map_create(union bpf_attr *attr)
507 int numa_node = bpf_map_attr_numa_node(attr);
512 err = CHECK_ATTR(BPF_MAP_CREATE);
516 f_flags = bpf_get_file_flag(attr->map_flags);
520 if (numa_node != NUMA_NO_NODE &&
521 ((unsigned int)numa_node >= nr_node_ids ||
522 !node_online(numa_node)))
525 /* find map type and init map: hashtable vs rbtree vs bloom vs ... */
526 map = find_and_alloc_map(attr);
530 err = bpf_obj_name_cpy(map->name, attr->map_name);
532 goto free_map_nouncharge;
534 atomic_set(&map->refcnt, 1);
535 atomic_set(&map->usercnt, 1);
537 if (attr->btf_key_type_id || attr->btf_value_type_id) {
540 if (!attr->btf_key_type_id || !attr->btf_value_type_id) {
542 goto free_map_nouncharge;
545 btf = btf_get_by_fd(attr->btf_fd);
548 goto free_map_nouncharge;
551 err = map_check_btf(map, btf, attr->btf_key_type_id,
552 attr->btf_value_type_id);
555 goto free_map_nouncharge;
559 map->btf_key_type_id = attr->btf_key_type_id;
560 map->btf_value_type_id = attr->btf_value_type_id;
562 map->spin_lock_off = -EINVAL;
565 err = security_bpf_map_alloc(map);
567 goto free_map_nouncharge;
569 err = bpf_map_init_memlock(map);
573 err = bpf_map_alloc_id(map);
577 err = bpf_map_new_fd(map, f_flags);
579 /* failed to allocate fd.
580 * bpf_map_put_with_uref() is needed because the above
581 * bpf_map_alloc_id() has published the map
582 * to the userspace and the userspace may
583 * have refcnt-ed it through BPF_MAP_GET_FD_BY_ID.
585 bpf_map_put_with_uref(map);
592 bpf_map_release_memlock(map);
594 security_bpf_map_free(map);
597 map->ops->map_free(map);
601 /* if error is returned, fd is released.
602 * On success caller should complete fd access with matching fdput()
604 struct bpf_map *__bpf_map_get(struct fd f)
607 return ERR_PTR(-EBADF);
608 if (f.file->f_op != &bpf_map_fops) {
610 return ERR_PTR(-EINVAL);
613 return f.file->private_data;
616 /* prog's and map's refcnt limit */
617 #define BPF_MAX_REFCNT 32768
619 struct bpf_map *bpf_map_inc(struct bpf_map *map, bool uref)
621 if (atomic_inc_return(&map->refcnt) > BPF_MAX_REFCNT) {
622 atomic_dec(&map->refcnt);
623 return ERR_PTR(-EBUSY);
626 atomic_inc(&map->usercnt);
629 EXPORT_SYMBOL_GPL(bpf_map_inc);
631 struct bpf_map *bpf_map_get_with_uref(u32 ufd)
633 struct fd f = fdget(ufd);
636 map = __bpf_map_get(f);
640 map = bpf_map_inc(map, true);
646 /* map_idr_lock should have been held */
647 static struct bpf_map *bpf_map_inc_not_zero(struct bpf_map *map,
652 refold = atomic_fetch_add_unless(&map->refcnt, 1, 0);
654 if (refold >= BPF_MAX_REFCNT) {
655 __bpf_map_put(map, false);
656 return ERR_PTR(-EBUSY);
660 return ERR_PTR(-ENOENT);
663 atomic_inc(&map->usercnt);
668 int __weak bpf_stackmap_copy(struct bpf_map *map, void *key, void *value)
673 static void *__bpf_copy_key(void __user *ukey, u64 key_size)
676 return memdup_user(ukey, key_size);
679 return ERR_PTR(-EINVAL);
684 /* last field in 'union bpf_attr' used by this command */
685 #define BPF_MAP_LOOKUP_ELEM_LAST_FIELD flags
687 static int map_lookup_elem(union bpf_attr *attr)
689 void __user *ukey = u64_to_user_ptr(attr->key);
690 void __user *uvalue = u64_to_user_ptr(attr->value);
691 int ufd = attr->map_fd;
693 void *key, *value, *ptr;
698 if (CHECK_ATTR(BPF_MAP_LOOKUP_ELEM))
701 if (attr->flags & ~BPF_F_LOCK)
705 map = __bpf_map_get(f);
709 if (!(f.file->f_mode & FMODE_CAN_READ)) {
714 if ((attr->flags & BPF_F_LOCK) &&
715 !map_value_has_spin_lock(map)) {
720 key = __bpf_copy_key(ukey, map->key_size);
726 if (map->map_type == BPF_MAP_TYPE_PERCPU_HASH ||
727 map->map_type == BPF_MAP_TYPE_LRU_PERCPU_HASH ||
728 map->map_type == BPF_MAP_TYPE_PERCPU_ARRAY ||
729 map->map_type == BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE)
730 value_size = round_up(map->value_size, 8) * num_possible_cpus();
731 else if (IS_FD_MAP(map))
732 value_size = sizeof(u32);
734 value_size = map->value_size;
737 value = kmalloc(value_size, GFP_USER | __GFP_NOWARN);
741 if (bpf_map_is_dev_bound(map)) {
742 err = bpf_map_offload_lookup_elem(map, key, value);
747 this_cpu_inc(bpf_prog_active);
748 if (map->map_type == BPF_MAP_TYPE_PERCPU_HASH ||
749 map->map_type == BPF_MAP_TYPE_LRU_PERCPU_HASH) {
750 err = bpf_percpu_hash_copy(map, key, value);
751 } else if (map->map_type == BPF_MAP_TYPE_PERCPU_ARRAY) {
752 err = bpf_percpu_array_copy(map, key, value);
753 } else if (map->map_type == BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE) {
754 err = bpf_percpu_cgroup_storage_copy(map, key, value);
755 } else if (map->map_type == BPF_MAP_TYPE_STACK_TRACE) {
756 err = bpf_stackmap_copy(map, key, value);
757 } else if (IS_FD_ARRAY(map)) {
758 err = bpf_fd_array_map_lookup_elem(map, key, value);
759 } else if (IS_FD_HASH(map)) {
760 err = bpf_fd_htab_map_lookup_elem(map, key, value);
761 } else if (map->map_type == BPF_MAP_TYPE_REUSEPORT_SOCKARRAY) {
762 err = bpf_fd_reuseport_array_lookup_elem(map, key, value);
763 } else if (map->map_type == BPF_MAP_TYPE_QUEUE ||
764 map->map_type == BPF_MAP_TYPE_STACK) {
765 err = map->ops->map_peek_elem(map, value);
768 ptr = map->ops->map_lookup_elem(map, key);
775 if (attr->flags & BPF_F_LOCK)
776 /* lock 'ptr' and copy everything but lock */
777 copy_map_value_locked(map, value, ptr, true);
779 copy_map_value(map, value, ptr);
780 /* mask lock, since value wasn't zero inited */
781 check_and_init_map_lock(map, value);
785 this_cpu_dec(bpf_prog_active);
793 if (copy_to_user(uvalue, value, value_size) != 0)
807 static void maybe_wait_bpf_programs(struct bpf_map *map)
809 /* Wait for any running BPF programs to complete so that
810 * userspace, when we return to it, knows that all programs
811 * that could be running use the new map value.
813 if (map->map_type == BPF_MAP_TYPE_HASH_OF_MAPS ||
814 map->map_type == BPF_MAP_TYPE_ARRAY_OF_MAPS)
818 #define BPF_MAP_UPDATE_ELEM_LAST_FIELD flags
820 static int map_update_elem(union bpf_attr *attr)
822 void __user *ukey = u64_to_user_ptr(attr->key);
823 void __user *uvalue = u64_to_user_ptr(attr->value);
824 int ufd = attr->map_fd;
831 if (CHECK_ATTR(BPF_MAP_UPDATE_ELEM))
835 map = __bpf_map_get(f);
839 if (!(f.file->f_mode & FMODE_CAN_WRITE)) {
844 if ((attr->flags & BPF_F_LOCK) &&
845 !map_value_has_spin_lock(map)) {
850 key = __bpf_copy_key(ukey, map->key_size);
856 if (map->map_type == BPF_MAP_TYPE_PERCPU_HASH ||
857 map->map_type == BPF_MAP_TYPE_LRU_PERCPU_HASH ||
858 map->map_type == BPF_MAP_TYPE_PERCPU_ARRAY ||
859 map->map_type == BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE)
860 value_size = round_up(map->value_size, 8) * num_possible_cpus();
862 value_size = map->value_size;
865 value = kmalloc(value_size, GFP_USER | __GFP_NOWARN);
870 if (copy_from_user(value, uvalue, value_size) != 0)
873 /* Need to create a kthread, thus must support schedule */
874 if (bpf_map_is_dev_bound(map)) {
875 err = bpf_map_offload_update_elem(map, key, value, attr->flags);
877 } else if (map->map_type == BPF_MAP_TYPE_CPUMAP ||
878 map->map_type == BPF_MAP_TYPE_SOCKHASH ||
879 map->map_type == BPF_MAP_TYPE_SOCKMAP) {
880 err = map->ops->map_update_elem(map, key, value, attr->flags);
884 /* must increment bpf_prog_active to avoid kprobe+bpf triggering from
885 * inside bpf map update or delete otherwise deadlocks are possible
888 __this_cpu_inc(bpf_prog_active);
889 if (map->map_type == BPF_MAP_TYPE_PERCPU_HASH ||
890 map->map_type == BPF_MAP_TYPE_LRU_PERCPU_HASH) {
891 err = bpf_percpu_hash_update(map, key, value, attr->flags);
892 } else if (map->map_type == BPF_MAP_TYPE_PERCPU_ARRAY) {
893 err = bpf_percpu_array_update(map, key, value, attr->flags);
894 } else if (map->map_type == BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE) {
895 err = bpf_percpu_cgroup_storage_update(map, key, value,
897 } else if (IS_FD_ARRAY(map)) {
899 err = bpf_fd_array_map_update_elem(map, f.file, key, value,
902 } else if (map->map_type == BPF_MAP_TYPE_HASH_OF_MAPS) {
904 err = bpf_fd_htab_map_update_elem(map, f.file, key, value,
907 } else if (map->map_type == BPF_MAP_TYPE_REUSEPORT_SOCKARRAY) {
908 /* rcu_read_lock() is not needed */
909 err = bpf_fd_reuseport_array_update_elem(map, key, value,
911 } else if (map->map_type == BPF_MAP_TYPE_QUEUE ||
912 map->map_type == BPF_MAP_TYPE_STACK) {
913 err = map->ops->map_push_elem(map, value, attr->flags);
916 err = map->ops->map_update_elem(map, key, value, attr->flags);
919 __this_cpu_dec(bpf_prog_active);
921 maybe_wait_bpf_programs(map);
932 #define BPF_MAP_DELETE_ELEM_LAST_FIELD key
934 static int map_delete_elem(union bpf_attr *attr)
936 void __user *ukey = u64_to_user_ptr(attr->key);
937 int ufd = attr->map_fd;
943 if (CHECK_ATTR(BPF_MAP_DELETE_ELEM))
947 map = __bpf_map_get(f);
951 if (!(f.file->f_mode & FMODE_CAN_WRITE)) {
956 key = __bpf_copy_key(ukey, map->key_size);
962 if (bpf_map_is_dev_bound(map)) {
963 err = bpf_map_offload_delete_elem(map, key);
968 __this_cpu_inc(bpf_prog_active);
970 err = map->ops->map_delete_elem(map, key);
972 __this_cpu_dec(bpf_prog_active);
974 maybe_wait_bpf_programs(map);
982 /* last field in 'union bpf_attr' used by this command */
983 #define BPF_MAP_GET_NEXT_KEY_LAST_FIELD next_key
985 static int map_get_next_key(union bpf_attr *attr)
987 void __user *ukey = u64_to_user_ptr(attr->key);
988 void __user *unext_key = u64_to_user_ptr(attr->next_key);
989 int ufd = attr->map_fd;
991 void *key, *next_key;
995 if (CHECK_ATTR(BPF_MAP_GET_NEXT_KEY))
999 map = __bpf_map_get(f);
1001 return PTR_ERR(map);
1003 if (!(f.file->f_mode & FMODE_CAN_READ)) {
1009 key = __bpf_copy_key(ukey, map->key_size);
1019 next_key = kmalloc(map->key_size, GFP_USER);
1023 if (bpf_map_is_dev_bound(map)) {
1024 err = bpf_map_offload_get_next_key(map, key, next_key);
1029 err = map->ops->map_get_next_key(map, key, next_key);
1036 if (copy_to_user(unext_key, next_key, map->key_size) != 0)
1050 #define BPF_MAP_LOOKUP_AND_DELETE_ELEM_LAST_FIELD value
1052 static int map_lookup_and_delete_elem(union bpf_attr *attr)
1054 void __user *ukey = u64_to_user_ptr(attr->key);
1055 void __user *uvalue = u64_to_user_ptr(attr->value);
1056 int ufd = attr->map_fd;
1057 struct bpf_map *map;
1063 if (CHECK_ATTR(BPF_MAP_LOOKUP_AND_DELETE_ELEM))
1067 map = __bpf_map_get(f);
1069 return PTR_ERR(map);
1071 if (!(f.file->f_mode & FMODE_CAN_WRITE)) {
1076 key = __bpf_copy_key(ukey, map->key_size);
1082 value_size = map->value_size;
1085 value = kmalloc(value_size, GFP_USER | __GFP_NOWARN);
1089 if (map->map_type == BPF_MAP_TYPE_QUEUE ||
1090 map->map_type == BPF_MAP_TYPE_STACK) {
1091 err = map->ops->map_pop_elem(map, value);
1099 if (copy_to_user(uvalue, value, value_size) != 0)
1113 static const struct bpf_prog_ops * const bpf_prog_types[] = {
1114 #define BPF_PROG_TYPE(_id, _name) \
1115 [_id] = & _name ## _prog_ops,
1116 #define BPF_MAP_TYPE(_id, _ops)
1117 #include <linux/bpf_types.h>
1118 #undef BPF_PROG_TYPE
1122 static int find_prog_type(enum bpf_prog_type type, struct bpf_prog *prog)
1124 const struct bpf_prog_ops *ops;
1126 if (type >= ARRAY_SIZE(bpf_prog_types))
1128 type = array_index_nospec(type, ARRAY_SIZE(bpf_prog_types));
1129 ops = bpf_prog_types[type];
1133 if (!bpf_prog_is_dev_bound(prog->aux))
1134 prog->aux->ops = ops;
1136 prog->aux->ops = &bpf_offload_prog_ops;
1141 /* drop refcnt on maps used by eBPF program and free auxilary data */
1142 static void free_used_maps(struct bpf_prog_aux *aux)
1144 enum bpf_cgroup_storage_type stype;
1147 for_each_cgroup_storage_type(stype) {
1148 if (!aux->cgroup_storage[stype])
1150 bpf_cgroup_storage_release(aux->prog,
1151 aux->cgroup_storage[stype]);
1154 for (i = 0; i < aux->used_map_cnt; i++)
1155 bpf_map_put(aux->used_maps[i]);
1157 kfree(aux->used_maps);
1160 int __bpf_prog_charge(struct user_struct *user, u32 pages)
1162 unsigned long memlock_limit = rlimit(RLIMIT_MEMLOCK) >> PAGE_SHIFT;
1163 unsigned long user_bufs;
1166 user_bufs = atomic_long_add_return(pages, &user->locked_vm);
1167 if (user_bufs > memlock_limit) {
1168 atomic_long_sub(pages, &user->locked_vm);
1176 void __bpf_prog_uncharge(struct user_struct *user, u32 pages)
1179 atomic_long_sub(pages, &user->locked_vm);
1182 static int bpf_prog_charge_memlock(struct bpf_prog *prog)
1184 struct user_struct *user = get_current_user();
1187 ret = __bpf_prog_charge(user, prog->pages);
1193 prog->aux->user = user;
1197 static void bpf_prog_uncharge_memlock(struct bpf_prog *prog)
1199 struct user_struct *user = prog->aux->user;
1201 __bpf_prog_uncharge(user, prog->pages);
1205 static int bpf_prog_alloc_id(struct bpf_prog *prog)
1209 idr_preload(GFP_KERNEL);
1210 spin_lock_bh(&prog_idr_lock);
1211 id = idr_alloc_cyclic(&prog_idr, prog, 1, INT_MAX, GFP_ATOMIC);
1214 spin_unlock_bh(&prog_idr_lock);
1217 /* id is in [1, INT_MAX) */
1218 if (WARN_ON_ONCE(!id))
1221 return id > 0 ? 0 : id;
1224 void bpf_prog_free_id(struct bpf_prog *prog, bool do_idr_lock)
1226 /* cBPF to eBPF migrations are currently not in the idr store.
1227 * Offloaded programs are removed from the store when their device
1228 * disappears - even if someone grabs an fd to them they are unusable,
1229 * simply waiting for refcnt to drop to be freed.
1235 spin_lock_bh(&prog_idr_lock);
1237 __acquire(&prog_idr_lock);
1239 idr_remove(&prog_idr, prog->aux->id);
1243 spin_unlock_bh(&prog_idr_lock);
1245 __release(&prog_idr_lock);
1248 static void __bpf_prog_put_rcu(struct rcu_head *rcu)
1250 struct bpf_prog_aux *aux = container_of(rcu, struct bpf_prog_aux, rcu);
1252 free_used_maps(aux);
1253 bpf_prog_uncharge_memlock(aux->prog);
1254 security_bpf_prog_free(aux);
1255 bpf_prog_free(aux->prog);
1258 static void __bpf_prog_put(struct bpf_prog *prog, bool do_idr_lock)
1260 if (atomic_dec_and_test(&prog->aux->refcnt)) {
1261 perf_event_bpf_event(prog, PERF_BPF_EVENT_PROG_UNLOAD, 0);
1262 /* bpf_prog_free_id() must be called first */
1263 bpf_prog_free_id(prog, do_idr_lock);
1264 bpf_prog_kallsyms_del_all(prog);
1265 btf_put(prog->aux->btf);
1266 kvfree(prog->aux->func_info);
1267 bpf_prog_free_linfo(prog);
1269 call_rcu(&prog->aux->rcu, __bpf_prog_put_rcu);
1273 void bpf_prog_put(struct bpf_prog *prog)
1275 __bpf_prog_put(prog, true);
1277 EXPORT_SYMBOL_GPL(bpf_prog_put);
1279 static int bpf_prog_release(struct inode *inode, struct file *filp)
1281 struct bpf_prog *prog = filp->private_data;
1287 static void bpf_prog_get_stats(const struct bpf_prog *prog,
1288 struct bpf_prog_stats *stats)
1290 u64 nsecs = 0, cnt = 0;
1293 for_each_possible_cpu(cpu) {
1294 const struct bpf_prog_stats *st;
1298 st = per_cpu_ptr(prog->aux->stats, cpu);
1300 start = u64_stats_fetch_begin_irq(&st->syncp);
1303 } while (u64_stats_fetch_retry_irq(&st->syncp, start));
1307 stats->nsecs = nsecs;
1311 #ifdef CONFIG_PROC_FS
1312 static void bpf_prog_show_fdinfo(struct seq_file *m, struct file *filp)
1314 const struct bpf_prog *prog = filp->private_data;
1315 char prog_tag[sizeof(prog->tag) * 2 + 1] = { };
1316 struct bpf_prog_stats stats;
1318 bpf_prog_get_stats(prog, &stats);
1319 bin2hex(prog_tag, prog->tag, sizeof(prog->tag));
1326 "run_time_ns:\t%llu\n"
1331 prog->pages * 1ULL << PAGE_SHIFT,
1338 const struct file_operations bpf_prog_fops = {
1339 #ifdef CONFIG_PROC_FS
1340 .show_fdinfo = bpf_prog_show_fdinfo,
1342 .release = bpf_prog_release,
1343 .read = bpf_dummy_read,
1344 .write = bpf_dummy_write,
1347 int bpf_prog_new_fd(struct bpf_prog *prog)
1351 ret = security_bpf_prog(prog);
1355 return anon_inode_getfd("bpf-prog", &bpf_prog_fops, prog,
1356 O_RDWR | O_CLOEXEC);
1359 static struct bpf_prog *____bpf_prog_get(struct fd f)
1362 return ERR_PTR(-EBADF);
1363 if (f.file->f_op != &bpf_prog_fops) {
1365 return ERR_PTR(-EINVAL);
1368 return f.file->private_data;
1371 struct bpf_prog *bpf_prog_add(struct bpf_prog *prog, int i)
1373 if (atomic_add_return(i, &prog->aux->refcnt) > BPF_MAX_REFCNT) {
1374 atomic_sub(i, &prog->aux->refcnt);
1375 return ERR_PTR(-EBUSY);
1379 EXPORT_SYMBOL_GPL(bpf_prog_add);
1381 void bpf_prog_sub(struct bpf_prog *prog, int i)
1383 /* Only to be used for undoing previous bpf_prog_add() in some
1384 * error path. We still know that another entity in our call
1385 * path holds a reference to the program, thus atomic_sub() can
1386 * be safely used in such cases!
1388 WARN_ON(atomic_sub_return(i, &prog->aux->refcnt) == 0);
1390 EXPORT_SYMBOL_GPL(bpf_prog_sub);
1392 struct bpf_prog *bpf_prog_inc(struct bpf_prog *prog)
1394 return bpf_prog_add(prog, 1);
1396 EXPORT_SYMBOL_GPL(bpf_prog_inc);
1398 /* prog_idr_lock should have been held */
1399 struct bpf_prog *bpf_prog_inc_not_zero(struct bpf_prog *prog)
1403 refold = atomic_fetch_add_unless(&prog->aux->refcnt, 1, 0);
1405 if (refold >= BPF_MAX_REFCNT) {
1406 __bpf_prog_put(prog, false);
1407 return ERR_PTR(-EBUSY);
1411 return ERR_PTR(-ENOENT);
1415 EXPORT_SYMBOL_GPL(bpf_prog_inc_not_zero);
1417 bool bpf_prog_get_ok(struct bpf_prog *prog,
1418 enum bpf_prog_type *attach_type, bool attach_drv)
1420 /* not an attachment, just a refcount inc, always allow */
1424 if (prog->type != *attach_type)
1426 if (bpf_prog_is_dev_bound(prog->aux) && !attach_drv)
1432 static struct bpf_prog *__bpf_prog_get(u32 ufd, enum bpf_prog_type *attach_type,
1435 struct fd f = fdget(ufd);
1436 struct bpf_prog *prog;
1438 prog = ____bpf_prog_get(f);
1441 if (!bpf_prog_get_ok(prog, attach_type, attach_drv)) {
1442 prog = ERR_PTR(-EINVAL);
1446 prog = bpf_prog_inc(prog);
1452 struct bpf_prog *bpf_prog_get(u32 ufd)
1454 return __bpf_prog_get(ufd, NULL, false);
1457 struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, enum bpf_prog_type type,
1460 return __bpf_prog_get(ufd, &type, attach_drv);
1462 EXPORT_SYMBOL_GPL(bpf_prog_get_type_dev);
1464 /* Initially all BPF programs could be loaded w/o specifying
1465 * expected_attach_type. Later for some of them specifying expected_attach_type
1466 * at load time became required so that program could be validated properly.
1467 * Programs of types that are allowed to be loaded both w/ and w/o (for
1468 * backward compatibility) expected_attach_type, should have the default attach
1469 * type assigned to expected_attach_type for the latter case, so that it can be
1470 * validated later at attach time.
1472 * bpf_prog_load_fixup_attach_type() sets expected_attach_type in @attr if
1473 * prog type requires it but has some attach types that have to be backward
1476 static void bpf_prog_load_fixup_attach_type(union bpf_attr *attr)
1478 switch (attr->prog_type) {
1479 case BPF_PROG_TYPE_CGROUP_SOCK:
1480 /* Unfortunately BPF_ATTACH_TYPE_UNSPEC enumeration doesn't
1481 * exist so checking for non-zero is the way to go here.
1483 if (!attr->expected_attach_type)
1484 attr->expected_attach_type =
1485 BPF_CGROUP_INET_SOCK_CREATE;
1491 bpf_prog_load_check_attach_type(enum bpf_prog_type prog_type,
1492 enum bpf_attach_type expected_attach_type)
1494 switch (prog_type) {
1495 case BPF_PROG_TYPE_CGROUP_SOCK:
1496 switch (expected_attach_type) {
1497 case BPF_CGROUP_INET_SOCK_CREATE:
1498 case BPF_CGROUP_INET4_POST_BIND:
1499 case BPF_CGROUP_INET6_POST_BIND:
1504 case BPF_PROG_TYPE_CGROUP_SOCK_ADDR:
1505 switch (expected_attach_type) {
1506 case BPF_CGROUP_INET4_BIND:
1507 case BPF_CGROUP_INET6_BIND:
1508 case BPF_CGROUP_INET4_CONNECT:
1509 case BPF_CGROUP_INET6_CONNECT:
1510 case BPF_CGROUP_UDP4_SENDMSG:
1511 case BPF_CGROUP_UDP6_SENDMSG:
1521 /* last field in 'union bpf_attr' used by this command */
1522 #define BPF_PROG_LOAD_LAST_FIELD line_info_cnt
1524 static int bpf_prog_load(union bpf_attr *attr, union bpf_attr __user *uattr)
1526 enum bpf_prog_type type = attr->prog_type;
1527 struct bpf_prog *prog;
1532 if (CHECK_ATTR(BPF_PROG_LOAD))
1535 if (attr->prog_flags & ~(BPF_F_STRICT_ALIGNMENT | BPF_F_ANY_ALIGNMENT))
1538 if (!IS_ENABLED(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) &&
1539 (attr->prog_flags & BPF_F_ANY_ALIGNMENT) &&
1540 !capable(CAP_SYS_ADMIN))
1543 /* copy eBPF program license from user space */
1544 if (strncpy_from_user(license, u64_to_user_ptr(attr->license),
1545 sizeof(license) - 1) < 0)
1547 license[sizeof(license) - 1] = 0;
1549 /* eBPF programs must be GPL compatible to use GPL-ed functions */
1550 is_gpl = license_is_gpl_compatible(license);
1552 if (attr->insn_cnt == 0 || attr->insn_cnt > BPF_MAXINSNS)
1554 if (type != BPF_PROG_TYPE_SOCKET_FILTER &&
1555 type != BPF_PROG_TYPE_CGROUP_SKB &&
1556 !capable(CAP_SYS_ADMIN))
1559 bpf_prog_load_fixup_attach_type(attr);
1560 if (bpf_prog_load_check_attach_type(type, attr->expected_attach_type))
1563 /* plain bpf_prog allocation */
1564 prog = bpf_prog_alloc(bpf_prog_size(attr->insn_cnt), GFP_USER);
1568 prog->expected_attach_type = attr->expected_attach_type;
1570 prog->aux->offload_requested = !!attr->prog_ifindex;
1572 err = security_bpf_prog_alloc(prog->aux);
1574 goto free_prog_nouncharge;
1576 err = bpf_prog_charge_memlock(prog);
1580 prog->len = attr->insn_cnt;
1583 if (copy_from_user(prog->insns, u64_to_user_ptr(attr->insns),
1584 bpf_prog_insn_size(prog)) != 0)
1587 prog->orig_prog = NULL;
1590 atomic_set(&prog->aux->refcnt, 1);
1591 prog->gpl_compatible = is_gpl ? 1 : 0;
1593 if (bpf_prog_is_dev_bound(prog->aux)) {
1594 err = bpf_prog_offload_init(prog, attr);
1599 /* find program type: socket_filter vs tracing_filter */
1600 err = find_prog_type(type, prog);
1604 prog->aux->load_time = ktime_get_boot_ns();
1605 err = bpf_obj_name_cpy(prog->aux->name, attr->prog_name);
1609 /* run eBPF verifier */
1610 err = bpf_check(&prog, attr, uattr);
1612 goto free_used_maps;
1614 prog = bpf_prog_select_runtime(prog, &err);
1616 goto free_used_maps;
1618 err = bpf_prog_alloc_id(prog);
1620 goto free_used_maps;
1622 err = bpf_prog_new_fd(prog);
1624 /* failed to allocate fd.
1625 * bpf_prog_put() is needed because the above
1626 * bpf_prog_alloc_id() has published the prog
1627 * to the userspace and the userspace may
1628 * have refcnt-ed it through BPF_PROG_GET_FD_BY_ID.
1634 bpf_prog_kallsyms_add(prog);
1635 perf_event_bpf_event(prog, PERF_BPF_EVENT_PROG_LOAD, 0);
1639 bpf_prog_free_linfo(prog);
1640 kvfree(prog->aux->func_info);
1641 btf_put(prog->aux->btf);
1642 bpf_prog_kallsyms_del_subprogs(prog);
1643 free_used_maps(prog->aux);
1645 bpf_prog_uncharge_memlock(prog);
1647 security_bpf_prog_free(prog->aux);
1648 free_prog_nouncharge:
1649 bpf_prog_free(prog);
1653 #define BPF_OBJ_LAST_FIELD file_flags
1655 static int bpf_obj_pin(const union bpf_attr *attr)
1657 if (CHECK_ATTR(BPF_OBJ) || attr->file_flags != 0)
1660 return bpf_obj_pin_user(attr->bpf_fd, u64_to_user_ptr(attr->pathname));
1663 static int bpf_obj_get(const union bpf_attr *attr)
1665 if (CHECK_ATTR(BPF_OBJ) || attr->bpf_fd != 0 ||
1666 attr->file_flags & ~BPF_OBJ_FLAG_MASK)
1669 return bpf_obj_get_user(u64_to_user_ptr(attr->pathname),
1673 struct bpf_raw_tracepoint {
1674 struct bpf_raw_event_map *btp;
1675 struct bpf_prog *prog;
1678 static int bpf_raw_tracepoint_release(struct inode *inode, struct file *filp)
1680 struct bpf_raw_tracepoint *raw_tp = filp->private_data;
1683 bpf_probe_unregister(raw_tp->btp, raw_tp->prog);
1684 bpf_prog_put(raw_tp->prog);
1686 bpf_put_raw_tracepoint(raw_tp->btp);
1691 static const struct file_operations bpf_raw_tp_fops = {
1692 .release = bpf_raw_tracepoint_release,
1693 .read = bpf_dummy_read,
1694 .write = bpf_dummy_write,
1697 #define BPF_RAW_TRACEPOINT_OPEN_LAST_FIELD raw_tracepoint.prog_fd
1699 static int bpf_raw_tracepoint_open(const union bpf_attr *attr)
1701 struct bpf_raw_tracepoint *raw_tp;
1702 struct bpf_raw_event_map *btp;
1703 struct bpf_prog *prog;
1707 if (strncpy_from_user(tp_name, u64_to_user_ptr(attr->raw_tracepoint.name),
1708 sizeof(tp_name) - 1) < 0)
1710 tp_name[sizeof(tp_name) - 1] = 0;
1712 btp = bpf_get_raw_tracepoint(tp_name);
1716 raw_tp = kzalloc(sizeof(*raw_tp), GFP_USER);
1723 prog = bpf_prog_get_type(attr->raw_tracepoint.prog_fd,
1724 BPF_PROG_TYPE_RAW_TRACEPOINT);
1726 err = PTR_ERR(prog);
1730 err = bpf_probe_register(raw_tp->btp, prog);
1734 raw_tp->prog = prog;
1735 tp_fd = anon_inode_getfd("bpf-raw-tracepoint", &bpf_raw_tp_fops, raw_tp,
1738 bpf_probe_unregister(raw_tp->btp, prog);
1749 bpf_put_raw_tracepoint(btp);
1753 static int bpf_prog_attach_check_attach_type(const struct bpf_prog *prog,
1754 enum bpf_attach_type attach_type)
1756 switch (prog->type) {
1757 case BPF_PROG_TYPE_CGROUP_SOCK:
1758 case BPF_PROG_TYPE_CGROUP_SOCK_ADDR:
1759 return attach_type == prog->expected_attach_type ? 0 : -EINVAL;
1765 #define BPF_PROG_ATTACH_LAST_FIELD attach_flags
1767 #define BPF_F_ATTACH_MASK \
1768 (BPF_F_ALLOW_OVERRIDE | BPF_F_ALLOW_MULTI)
1770 static int bpf_prog_attach(const union bpf_attr *attr)
1772 enum bpf_prog_type ptype;
1773 struct bpf_prog *prog;
1776 if (!capable(CAP_NET_ADMIN))
1779 if (CHECK_ATTR(BPF_PROG_ATTACH))
1782 if (attr->attach_flags & ~BPF_F_ATTACH_MASK)
1785 switch (attr->attach_type) {
1786 case BPF_CGROUP_INET_INGRESS:
1787 case BPF_CGROUP_INET_EGRESS:
1788 ptype = BPF_PROG_TYPE_CGROUP_SKB;
1790 case BPF_CGROUP_INET_SOCK_CREATE:
1791 case BPF_CGROUP_INET4_POST_BIND:
1792 case BPF_CGROUP_INET6_POST_BIND:
1793 ptype = BPF_PROG_TYPE_CGROUP_SOCK;
1795 case BPF_CGROUP_INET4_BIND:
1796 case BPF_CGROUP_INET6_BIND:
1797 case BPF_CGROUP_INET4_CONNECT:
1798 case BPF_CGROUP_INET6_CONNECT:
1799 case BPF_CGROUP_UDP4_SENDMSG:
1800 case BPF_CGROUP_UDP6_SENDMSG:
1801 ptype = BPF_PROG_TYPE_CGROUP_SOCK_ADDR;
1803 case BPF_CGROUP_SOCK_OPS:
1804 ptype = BPF_PROG_TYPE_SOCK_OPS;
1806 case BPF_CGROUP_DEVICE:
1807 ptype = BPF_PROG_TYPE_CGROUP_DEVICE;
1809 case BPF_SK_MSG_VERDICT:
1810 ptype = BPF_PROG_TYPE_SK_MSG;
1812 case BPF_SK_SKB_STREAM_PARSER:
1813 case BPF_SK_SKB_STREAM_VERDICT:
1814 ptype = BPF_PROG_TYPE_SK_SKB;
1816 case BPF_LIRC_MODE2:
1817 ptype = BPF_PROG_TYPE_LIRC_MODE2;
1819 case BPF_FLOW_DISSECTOR:
1820 ptype = BPF_PROG_TYPE_FLOW_DISSECTOR;
1826 prog = bpf_prog_get_type(attr->attach_bpf_fd, ptype);
1828 return PTR_ERR(prog);
1830 if (bpf_prog_attach_check_attach_type(prog, attr->attach_type)) {
1836 case BPF_PROG_TYPE_SK_SKB:
1837 case BPF_PROG_TYPE_SK_MSG:
1838 ret = sock_map_get_from_fd(attr, prog);
1840 case BPF_PROG_TYPE_LIRC_MODE2:
1841 ret = lirc_prog_attach(attr, prog);
1843 case BPF_PROG_TYPE_FLOW_DISSECTOR:
1844 ret = skb_flow_dissector_bpf_prog_attach(attr, prog);
1847 ret = cgroup_bpf_prog_attach(attr, ptype, prog);
1855 #define BPF_PROG_DETACH_LAST_FIELD attach_type
1857 static int bpf_prog_detach(const union bpf_attr *attr)
1859 enum bpf_prog_type ptype;
1861 if (!capable(CAP_NET_ADMIN))
1864 if (CHECK_ATTR(BPF_PROG_DETACH))
1867 switch (attr->attach_type) {
1868 case BPF_CGROUP_INET_INGRESS:
1869 case BPF_CGROUP_INET_EGRESS:
1870 ptype = BPF_PROG_TYPE_CGROUP_SKB;
1872 case BPF_CGROUP_INET_SOCK_CREATE:
1873 case BPF_CGROUP_INET4_POST_BIND:
1874 case BPF_CGROUP_INET6_POST_BIND:
1875 ptype = BPF_PROG_TYPE_CGROUP_SOCK;
1877 case BPF_CGROUP_INET4_BIND:
1878 case BPF_CGROUP_INET6_BIND:
1879 case BPF_CGROUP_INET4_CONNECT:
1880 case BPF_CGROUP_INET6_CONNECT:
1881 case BPF_CGROUP_UDP4_SENDMSG:
1882 case BPF_CGROUP_UDP6_SENDMSG:
1883 ptype = BPF_PROG_TYPE_CGROUP_SOCK_ADDR;
1885 case BPF_CGROUP_SOCK_OPS:
1886 ptype = BPF_PROG_TYPE_SOCK_OPS;
1888 case BPF_CGROUP_DEVICE:
1889 ptype = BPF_PROG_TYPE_CGROUP_DEVICE;
1891 case BPF_SK_MSG_VERDICT:
1892 return sock_map_get_from_fd(attr, NULL);
1893 case BPF_SK_SKB_STREAM_PARSER:
1894 case BPF_SK_SKB_STREAM_VERDICT:
1895 return sock_map_get_from_fd(attr, NULL);
1896 case BPF_LIRC_MODE2:
1897 return lirc_prog_detach(attr);
1898 case BPF_FLOW_DISSECTOR:
1899 return skb_flow_dissector_bpf_prog_detach(attr);
1904 return cgroup_bpf_prog_detach(attr, ptype);
1907 #define BPF_PROG_QUERY_LAST_FIELD query.prog_cnt
1909 static int bpf_prog_query(const union bpf_attr *attr,
1910 union bpf_attr __user *uattr)
1912 if (!capable(CAP_NET_ADMIN))
1914 if (CHECK_ATTR(BPF_PROG_QUERY))
1916 if (attr->query.query_flags & ~BPF_F_QUERY_EFFECTIVE)
1919 switch (attr->query.attach_type) {
1920 case BPF_CGROUP_INET_INGRESS:
1921 case BPF_CGROUP_INET_EGRESS:
1922 case BPF_CGROUP_INET_SOCK_CREATE:
1923 case BPF_CGROUP_INET4_BIND:
1924 case BPF_CGROUP_INET6_BIND:
1925 case BPF_CGROUP_INET4_POST_BIND:
1926 case BPF_CGROUP_INET6_POST_BIND:
1927 case BPF_CGROUP_INET4_CONNECT:
1928 case BPF_CGROUP_INET6_CONNECT:
1929 case BPF_CGROUP_UDP4_SENDMSG:
1930 case BPF_CGROUP_UDP6_SENDMSG:
1931 case BPF_CGROUP_SOCK_OPS:
1932 case BPF_CGROUP_DEVICE:
1934 case BPF_LIRC_MODE2:
1935 return lirc_prog_query(attr, uattr);
1940 return cgroup_bpf_prog_query(attr, uattr);
1943 #define BPF_PROG_TEST_RUN_LAST_FIELD test.duration
1945 static int bpf_prog_test_run(const union bpf_attr *attr,
1946 union bpf_attr __user *uattr)
1948 struct bpf_prog *prog;
1949 int ret = -ENOTSUPP;
1951 if (!capable(CAP_SYS_ADMIN))
1953 if (CHECK_ATTR(BPF_PROG_TEST_RUN))
1956 prog = bpf_prog_get(attr->test.prog_fd);
1958 return PTR_ERR(prog);
1960 if (prog->aux->ops->test_run)
1961 ret = prog->aux->ops->test_run(prog, attr, uattr);
1967 #define BPF_OBJ_GET_NEXT_ID_LAST_FIELD next_id
1969 static int bpf_obj_get_next_id(const union bpf_attr *attr,
1970 union bpf_attr __user *uattr,
1974 u32 next_id = attr->start_id;
1977 if (CHECK_ATTR(BPF_OBJ_GET_NEXT_ID) || next_id >= INT_MAX)
1980 if (!capable(CAP_SYS_ADMIN))
1985 if (!idr_get_next(idr, &next_id))
1987 spin_unlock_bh(lock);
1990 err = put_user(next_id, &uattr->next_id);
1995 #define BPF_PROG_GET_FD_BY_ID_LAST_FIELD prog_id
1997 static int bpf_prog_get_fd_by_id(const union bpf_attr *attr)
1999 struct bpf_prog *prog;
2000 u32 id = attr->prog_id;
2003 if (CHECK_ATTR(BPF_PROG_GET_FD_BY_ID))
2006 if (!capable(CAP_SYS_ADMIN))
2009 spin_lock_bh(&prog_idr_lock);
2010 prog = idr_find(&prog_idr, id);
2012 prog = bpf_prog_inc_not_zero(prog);
2014 prog = ERR_PTR(-ENOENT);
2015 spin_unlock_bh(&prog_idr_lock);
2018 return PTR_ERR(prog);
2020 fd = bpf_prog_new_fd(prog);
2027 #define BPF_MAP_GET_FD_BY_ID_LAST_FIELD open_flags
2029 static int bpf_map_get_fd_by_id(const union bpf_attr *attr)
2031 struct bpf_map *map;
2032 u32 id = attr->map_id;
2036 if (CHECK_ATTR(BPF_MAP_GET_FD_BY_ID) ||
2037 attr->open_flags & ~BPF_OBJ_FLAG_MASK)
2040 if (!capable(CAP_SYS_ADMIN))
2043 f_flags = bpf_get_file_flag(attr->open_flags);
2047 spin_lock_bh(&map_idr_lock);
2048 map = idr_find(&map_idr, id);
2050 map = bpf_map_inc_not_zero(map, true);
2052 map = ERR_PTR(-ENOENT);
2053 spin_unlock_bh(&map_idr_lock);
2056 return PTR_ERR(map);
2058 fd = bpf_map_new_fd(map, f_flags);
2060 bpf_map_put_with_uref(map);
2065 static const struct bpf_map *bpf_map_from_imm(const struct bpf_prog *prog,
2070 for (i = 0; i < prog->aux->used_map_cnt; i++)
2071 if (prog->aux->used_maps[i] == (void *)addr)
2072 return prog->aux->used_maps[i];
2076 static struct bpf_insn *bpf_insn_prepare_dump(const struct bpf_prog *prog)
2078 const struct bpf_map *map;
2079 struct bpf_insn *insns;
2083 insns = kmemdup(prog->insnsi, bpf_prog_insn_size(prog),
2088 for (i = 0; i < prog->len; i++) {
2089 if (insns[i].code == (BPF_JMP | BPF_TAIL_CALL)) {
2090 insns[i].code = BPF_JMP | BPF_CALL;
2091 insns[i].imm = BPF_FUNC_tail_call;
2094 if (insns[i].code == (BPF_JMP | BPF_CALL) ||
2095 insns[i].code == (BPF_JMP | BPF_CALL_ARGS)) {
2096 if (insns[i].code == (BPF_JMP | BPF_CALL_ARGS))
2097 insns[i].code = BPF_JMP | BPF_CALL;
2098 if (!bpf_dump_raw_ok())
2103 if (insns[i].code != (BPF_LD | BPF_IMM | BPF_DW))
2106 imm = ((u64)insns[i + 1].imm << 32) | (u32)insns[i].imm;
2107 map = bpf_map_from_imm(prog, imm);
2109 insns[i].src_reg = BPF_PSEUDO_MAP_FD;
2110 insns[i].imm = map->id;
2111 insns[i + 1].imm = 0;
2119 static int set_info_rec_size(struct bpf_prog_info *info)
2122 * Ensure info.*_rec_size is the same as kernel expected size
2126 * Only allow zero *_rec_size if both _rec_size and _cnt are
2127 * zero. In this case, the kernel will set the expected
2128 * _rec_size back to the info.
2131 if ((info->nr_func_info || info->func_info_rec_size) &&
2132 info->func_info_rec_size != sizeof(struct bpf_func_info))
2135 if ((info->nr_line_info || info->line_info_rec_size) &&
2136 info->line_info_rec_size != sizeof(struct bpf_line_info))
2139 if ((info->nr_jited_line_info || info->jited_line_info_rec_size) &&
2140 info->jited_line_info_rec_size != sizeof(__u64))
2143 info->func_info_rec_size = sizeof(struct bpf_func_info);
2144 info->line_info_rec_size = sizeof(struct bpf_line_info);
2145 info->jited_line_info_rec_size = sizeof(__u64);
2150 static int bpf_prog_get_info_by_fd(struct bpf_prog *prog,
2151 const union bpf_attr *attr,
2152 union bpf_attr __user *uattr)
2154 struct bpf_prog_info __user *uinfo = u64_to_user_ptr(attr->info.info);
2155 struct bpf_prog_info info = {};
2156 u32 info_len = attr->info.info_len;
2157 struct bpf_prog_stats stats;
2158 char __user *uinsns;
2162 err = bpf_check_uarg_tail_zero(uinfo, sizeof(info), info_len);
2165 info_len = min_t(u32, sizeof(info), info_len);
2167 if (copy_from_user(&info, uinfo, info_len))
2170 info.type = prog->type;
2171 info.id = prog->aux->id;
2172 info.load_time = prog->aux->load_time;
2173 info.created_by_uid = from_kuid_munged(current_user_ns(),
2174 prog->aux->user->uid);
2175 info.gpl_compatible = prog->gpl_compatible;
2177 memcpy(info.tag, prog->tag, sizeof(prog->tag));
2178 memcpy(info.name, prog->aux->name, sizeof(prog->aux->name));
2180 ulen = info.nr_map_ids;
2181 info.nr_map_ids = prog->aux->used_map_cnt;
2182 ulen = min_t(u32, info.nr_map_ids, ulen);
2184 u32 __user *user_map_ids = u64_to_user_ptr(info.map_ids);
2187 for (i = 0; i < ulen; i++)
2188 if (put_user(prog->aux->used_maps[i]->id,
2193 err = set_info_rec_size(&info);
2197 bpf_prog_get_stats(prog, &stats);
2198 info.run_time_ns = stats.nsecs;
2199 info.run_cnt = stats.cnt;
2201 if (!capable(CAP_SYS_ADMIN)) {
2202 info.jited_prog_len = 0;
2203 info.xlated_prog_len = 0;
2204 info.nr_jited_ksyms = 0;
2205 info.nr_jited_func_lens = 0;
2206 info.nr_func_info = 0;
2207 info.nr_line_info = 0;
2208 info.nr_jited_line_info = 0;
2212 ulen = info.xlated_prog_len;
2213 info.xlated_prog_len = bpf_prog_insn_size(prog);
2214 if (info.xlated_prog_len && ulen) {
2215 struct bpf_insn *insns_sanitized;
2218 if (prog->blinded && !bpf_dump_raw_ok()) {
2219 info.xlated_prog_insns = 0;
2222 insns_sanitized = bpf_insn_prepare_dump(prog);
2223 if (!insns_sanitized)
2225 uinsns = u64_to_user_ptr(info.xlated_prog_insns);
2226 ulen = min_t(u32, info.xlated_prog_len, ulen);
2227 fault = copy_to_user(uinsns, insns_sanitized, ulen);
2228 kfree(insns_sanitized);
2233 if (bpf_prog_is_dev_bound(prog->aux)) {
2234 err = bpf_prog_offload_info_fill(&info, prog);
2240 /* NOTE: the following code is supposed to be skipped for offload.
2241 * bpf_prog_offload_info_fill() is the place to fill similar fields
2244 ulen = info.jited_prog_len;
2245 if (prog->aux->func_cnt) {
2248 info.jited_prog_len = 0;
2249 for (i = 0; i < prog->aux->func_cnt; i++)
2250 info.jited_prog_len += prog->aux->func[i]->jited_len;
2252 info.jited_prog_len = prog->jited_len;
2255 if (info.jited_prog_len && ulen) {
2256 if (bpf_dump_raw_ok()) {
2257 uinsns = u64_to_user_ptr(info.jited_prog_insns);
2258 ulen = min_t(u32, info.jited_prog_len, ulen);
2260 /* for multi-function programs, copy the JITed
2261 * instructions for all the functions
2263 if (prog->aux->func_cnt) {
2268 for (i = 0; i < prog->aux->func_cnt; i++) {
2269 len = prog->aux->func[i]->jited_len;
2270 len = min_t(u32, len, free);
2271 img = (u8 *) prog->aux->func[i]->bpf_func;
2272 if (copy_to_user(uinsns, img, len))
2280 if (copy_to_user(uinsns, prog->bpf_func, ulen))
2284 info.jited_prog_insns = 0;
2288 ulen = info.nr_jited_ksyms;
2289 info.nr_jited_ksyms = prog->aux->func_cnt ? : 1;
2291 if (bpf_dump_raw_ok()) {
2292 unsigned long ksym_addr;
2293 u64 __user *user_ksyms;
2296 /* copy the address of the kernel symbol
2297 * corresponding to each function
2299 ulen = min_t(u32, info.nr_jited_ksyms, ulen);
2300 user_ksyms = u64_to_user_ptr(info.jited_ksyms);
2301 if (prog->aux->func_cnt) {
2302 for (i = 0; i < ulen; i++) {
2303 ksym_addr = (unsigned long)
2304 prog->aux->func[i]->bpf_func;
2305 if (put_user((u64) ksym_addr,
2310 ksym_addr = (unsigned long) prog->bpf_func;
2311 if (put_user((u64) ksym_addr, &user_ksyms[0]))
2315 info.jited_ksyms = 0;
2319 ulen = info.nr_jited_func_lens;
2320 info.nr_jited_func_lens = prog->aux->func_cnt ? : 1;
2322 if (bpf_dump_raw_ok()) {
2323 u32 __user *user_lens;
2326 /* copy the JITed image lengths for each function */
2327 ulen = min_t(u32, info.nr_jited_func_lens, ulen);
2328 user_lens = u64_to_user_ptr(info.jited_func_lens);
2329 if (prog->aux->func_cnt) {
2330 for (i = 0; i < ulen; i++) {
2332 prog->aux->func[i]->jited_len;
2333 if (put_user(func_len, &user_lens[i]))
2337 func_len = prog->jited_len;
2338 if (put_user(func_len, &user_lens[0]))
2342 info.jited_func_lens = 0;
2347 info.btf_id = btf_id(prog->aux->btf);
2349 ulen = info.nr_func_info;
2350 info.nr_func_info = prog->aux->func_info_cnt;
2351 if (info.nr_func_info && ulen) {
2352 char __user *user_finfo;
2354 user_finfo = u64_to_user_ptr(info.func_info);
2355 ulen = min_t(u32, info.nr_func_info, ulen);
2356 if (copy_to_user(user_finfo, prog->aux->func_info,
2357 info.func_info_rec_size * ulen))
2361 ulen = info.nr_line_info;
2362 info.nr_line_info = prog->aux->nr_linfo;
2363 if (info.nr_line_info && ulen) {
2364 __u8 __user *user_linfo;
2366 user_linfo = u64_to_user_ptr(info.line_info);
2367 ulen = min_t(u32, info.nr_line_info, ulen);
2368 if (copy_to_user(user_linfo, prog->aux->linfo,
2369 info.line_info_rec_size * ulen))
2373 ulen = info.nr_jited_line_info;
2374 if (prog->aux->jited_linfo)
2375 info.nr_jited_line_info = prog->aux->nr_linfo;
2377 info.nr_jited_line_info = 0;
2378 if (info.nr_jited_line_info && ulen) {
2379 if (bpf_dump_raw_ok()) {
2380 __u64 __user *user_linfo;
2383 user_linfo = u64_to_user_ptr(info.jited_line_info);
2384 ulen = min_t(u32, info.nr_jited_line_info, ulen);
2385 for (i = 0; i < ulen; i++) {
2386 if (put_user((__u64)(long)prog->aux->jited_linfo[i],
2391 info.jited_line_info = 0;
2395 ulen = info.nr_prog_tags;
2396 info.nr_prog_tags = prog->aux->func_cnt ? : 1;
2398 __u8 __user (*user_prog_tags)[BPF_TAG_SIZE];
2401 user_prog_tags = u64_to_user_ptr(info.prog_tags);
2402 ulen = min_t(u32, info.nr_prog_tags, ulen);
2403 if (prog->aux->func_cnt) {
2404 for (i = 0; i < ulen; i++) {
2405 if (copy_to_user(user_prog_tags[i],
2406 prog->aux->func[i]->tag,
2411 if (copy_to_user(user_prog_tags[0],
2412 prog->tag, BPF_TAG_SIZE))
2418 if (copy_to_user(uinfo, &info, info_len) ||
2419 put_user(info_len, &uattr->info.info_len))
2425 static int bpf_map_get_info_by_fd(struct bpf_map *map,
2426 const union bpf_attr *attr,
2427 union bpf_attr __user *uattr)
2429 struct bpf_map_info __user *uinfo = u64_to_user_ptr(attr->info.info);
2430 struct bpf_map_info info = {};
2431 u32 info_len = attr->info.info_len;
2434 err = bpf_check_uarg_tail_zero(uinfo, sizeof(info), info_len);
2437 info_len = min_t(u32, sizeof(info), info_len);
2439 info.type = map->map_type;
2441 info.key_size = map->key_size;
2442 info.value_size = map->value_size;
2443 info.max_entries = map->max_entries;
2444 info.map_flags = map->map_flags;
2445 memcpy(info.name, map->name, sizeof(map->name));
2448 info.btf_id = btf_id(map->btf);
2449 info.btf_key_type_id = map->btf_key_type_id;
2450 info.btf_value_type_id = map->btf_value_type_id;
2453 if (bpf_map_is_dev_bound(map)) {
2454 err = bpf_map_offload_info_fill(&info, map);
2459 if (copy_to_user(uinfo, &info, info_len) ||
2460 put_user(info_len, &uattr->info.info_len))
2466 static int bpf_btf_get_info_by_fd(struct btf *btf,
2467 const union bpf_attr *attr,
2468 union bpf_attr __user *uattr)
2470 struct bpf_btf_info __user *uinfo = u64_to_user_ptr(attr->info.info);
2471 u32 info_len = attr->info.info_len;
2474 err = bpf_check_uarg_tail_zero(uinfo, sizeof(*uinfo), info_len);
2478 return btf_get_info_by_fd(btf, attr, uattr);
2481 #define BPF_OBJ_GET_INFO_BY_FD_LAST_FIELD info.info
2483 static int bpf_obj_get_info_by_fd(const union bpf_attr *attr,
2484 union bpf_attr __user *uattr)
2486 int ufd = attr->info.bpf_fd;
2490 if (CHECK_ATTR(BPF_OBJ_GET_INFO_BY_FD))
2497 if (f.file->f_op == &bpf_prog_fops)
2498 err = bpf_prog_get_info_by_fd(f.file->private_data, attr,
2500 else if (f.file->f_op == &bpf_map_fops)
2501 err = bpf_map_get_info_by_fd(f.file->private_data, attr,
2503 else if (f.file->f_op == &btf_fops)
2504 err = bpf_btf_get_info_by_fd(f.file->private_data, attr, uattr);
2512 #define BPF_BTF_LOAD_LAST_FIELD btf_log_level
2514 static int bpf_btf_load(const union bpf_attr *attr)
2516 if (CHECK_ATTR(BPF_BTF_LOAD))
2519 if (!capable(CAP_SYS_ADMIN))
2522 return btf_new_fd(attr);
2525 #define BPF_BTF_GET_FD_BY_ID_LAST_FIELD btf_id
2527 static int bpf_btf_get_fd_by_id(const union bpf_attr *attr)
2529 if (CHECK_ATTR(BPF_BTF_GET_FD_BY_ID))
2532 if (!capable(CAP_SYS_ADMIN))
2535 return btf_get_fd_by_id(attr->btf_id);
2538 static int bpf_task_fd_query_copy(const union bpf_attr *attr,
2539 union bpf_attr __user *uattr,
2540 u32 prog_id, u32 fd_type,
2541 const char *buf, u64 probe_offset,
2544 char __user *ubuf = u64_to_user_ptr(attr->task_fd_query.buf);
2545 u32 len = buf ? strlen(buf) : 0, input_len;
2548 if (put_user(len, &uattr->task_fd_query.buf_len))
2550 input_len = attr->task_fd_query.buf_len;
2551 if (input_len && ubuf) {
2553 /* nothing to copy, just make ubuf NULL terminated */
2556 if (put_user(zero, ubuf))
2558 } else if (input_len >= len + 1) {
2559 /* ubuf can hold the string with NULL terminator */
2560 if (copy_to_user(ubuf, buf, len + 1))
2563 /* ubuf cannot hold the string with NULL terminator,
2564 * do a partial copy with NULL terminator.
2569 if (copy_to_user(ubuf, buf, input_len - 1))
2571 if (put_user(zero, ubuf + input_len - 1))
2576 if (put_user(prog_id, &uattr->task_fd_query.prog_id) ||
2577 put_user(fd_type, &uattr->task_fd_query.fd_type) ||
2578 put_user(probe_offset, &uattr->task_fd_query.probe_offset) ||
2579 put_user(probe_addr, &uattr->task_fd_query.probe_addr))
2585 #define BPF_TASK_FD_QUERY_LAST_FIELD task_fd_query.probe_addr
2587 static int bpf_task_fd_query(const union bpf_attr *attr,
2588 union bpf_attr __user *uattr)
2590 pid_t pid = attr->task_fd_query.pid;
2591 u32 fd = attr->task_fd_query.fd;
2592 const struct perf_event *event;
2593 struct files_struct *files;
2594 struct task_struct *task;
2598 if (CHECK_ATTR(BPF_TASK_FD_QUERY))
2601 if (!capable(CAP_SYS_ADMIN))
2604 if (attr->task_fd_query.flags != 0)
2607 task = get_pid_task(find_vpid(pid), PIDTYPE_PID);
2611 files = get_files_struct(task);
2612 put_task_struct(task);
2617 spin_lock(&files->file_lock);
2618 file = fcheck_files(files, fd);
2623 spin_unlock(&files->file_lock);
2624 put_files_struct(files);
2629 if (file->f_op == &bpf_raw_tp_fops) {
2630 struct bpf_raw_tracepoint *raw_tp = file->private_data;
2631 struct bpf_raw_event_map *btp = raw_tp->btp;
2633 err = bpf_task_fd_query_copy(attr, uattr,
2634 raw_tp->prog->aux->id,
2635 BPF_FD_TYPE_RAW_TRACEPOINT,
2636 btp->tp->name, 0, 0);
2640 event = perf_get_event(file);
2641 if (!IS_ERR(event)) {
2642 u64 probe_offset, probe_addr;
2643 u32 prog_id, fd_type;
2646 err = bpf_get_perf_event_info(event, &prog_id, &fd_type,
2647 &buf, &probe_offset,
2650 err = bpf_task_fd_query_copy(attr, uattr, prog_id,
2664 SYSCALL_DEFINE3(bpf, int, cmd, union bpf_attr __user *, uattr, unsigned int, size)
2666 union bpf_attr attr = {};
2669 if (sysctl_unprivileged_bpf_disabled && !capable(CAP_SYS_ADMIN))
2672 err = bpf_check_uarg_tail_zero(uattr, sizeof(attr), size);
2675 size = min_t(u32, size, sizeof(attr));
2677 /* copy attributes from user space, may be less than sizeof(bpf_attr) */
2678 if (copy_from_user(&attr, uattr, size) != 0)
2681 err = security_bpf(cmd, &attr, size);
2686 case BPF_MAP_CREATE:
2687 err = map_create(&attr);
2689 case BPF_MAP_LOOKUP_ELEM:
2690 err = map_lookup_elem(&attr);
2692 case BPF_MAP_UPDATE_ELEM:
2693 err = map_update_elem(&attr);
2695 case BPF_MAP_DELETE_ELEM:
2696 err = map_delete_elem(&attr);
2698 case BPF_MAP_GET_NEXT_KEY:
2699 err = map_get_next_key(&attr);
2702 err = bpf_prog_load(&attr, uattr);
2705 err = bpf_obj_pin(&attr);
2708 err = bpf_obj_get(&attr);
2710 case BPF_PROG_ATTACH:
2711 err = bpf_prog_attach(&attr);
2713 case BPF_PROG_DETACH:
2714 err = bpf_prog_detach(&attr);
2716 case BPF_PROG_QUERY:
2717 err = bpf_prog_query(&attr, uattr);
2719 case BPF_PROG_TEST_RUN:
2720 err = bpf_prog_test_run(&attr, uattr);
2722 case BPF_PROG_GET_NEXT_ID:
2723 err = bpf_obj_get_next_id(&attr, uattr,
2724 &prog_idr, &prog_idr_lock);
2726 case BPF_MAP_GET_NEXT_ID:
2727 err = bpf_obj_get_next_id(&attr, uattr,
2728 &map_idr, &map_idr_lock);
2730 case BPF_PROG_GET_FD_BY_ID:
2731 err = bpf_prog_get_fd_by_id(&attr);
2733 case BPF_MAP_GET_FD_BY_ID:
2734 err = bpf_map_get_fd_by_id(&attr);
2736 case BPF_OBJ_GET_INFO_BY_FD:
2737 err = bpf_obj_get_info_by_fd(&attr, uattr);
2739 case BPF_RAW_TRACEPOINT_OPEN:
2740 err = bpf_raw_tracepoint_open(&attr);
2743 err = bpf_btf_load(&attr);
2745 case BPF_BTF_GET_FD_BY_ID:
2746 err = bpf_btf_get_fd_by_id(&attr);
2748 case BPF_TASK_FD_QUERY:
2749 err = bpf_task_fd_query(&attr, uattr);
2751 case BPF_MAP_LOOKUP_AND_DELETE_ELEM:
2752 err = map_lookup_and_delete_elem(&attr);