diff options
Diffstat (limited to '')
| -rw-r--r-- | kernel/bpf/syscall.c | 2479 |
1 files changed, 2479 insertions, 0 deletions
diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c new file mode 100644 index 000000000..e940c1f65 --- /dev/null +++ b/kernel/bpf/syscall.c @@ -0,0 +1,2479 @@ +/* Copyright (c) 2011-2014 PLUMgrid, http://plumgrid.com + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of version 2 of the GNU General Public + * License as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + */ +#include <linux/bpf.h> +#include <linux/bpf_trace.h> +#include <linux/bpf_lirc.h> +#include <linux/btf.h> +#include <linux/syscalls.h> +#include <linux/slab.h> +#include <linux/sched/signal.h> +#include <linux/vmalloc.h> +#include <linux/mmzone.h> +#include <linux/anon_inodes.h> +#include <linux/fdtable.h> +#include <linux/file.h> +#include <linux/fs.h> +#include <linux/license.h> +#include <linux/filter.h> +#include <linux/version.h> +#include <linux/kernel.h> +#include <linux/idr.h> +#include <linux/cred.h> +#include <linux/timekeeping.h> +#include <linux/ctype.h> +#include <linux/btf.h> +#include <linux/nospec.h> + +#define IS_FD_ARRAY(map) ((map)->map_type == BPF_MAP_TYPE_PROG_ARRAY || \ + (map)->map_type == BPF_MAP_TYPE_PERF_EVENT_ARRAY || \ + (map)->map_type == BPF_MAP_TYPE_CGROUP_ARRAY || \ + (map)->map_type == BPF_MAP_TYPE_ARRAY_OF_MAPS) +#define IS_FD_HASH(map) ((map)->map_type == BPF_MAP_TYPE_HASH_OF_MAPS) +#define IS_FD_MAP(map) (IS_FD_ARRAY(map) || IS_FD_HASH(map)) + +#define BPF_OBJ_FLAG_MASK (BPF_F_RDONLY | BPF_F_WRONLY) + +DEFINE_PER_CPU(int, bpf_prog_active); +static DEFINE_IDR(prog_idr); +static DEFINE_SPINLOCK(prog_idr_lock); +static DEFINE_IDR(map_idr); +static DEFINE_SPINLOCK(map_idr_lock); + +int sysctl_unprivileged_bpf_disabled __read_mostly = + IS_BUILTIN(CONFIG_BPF_UNPRIV_DEFAULT_OFF) ? 2 : 0; + +static const struct bpf_map_ops * const bpf_map_types[] = { +#define BPF_PROG_TYPE(_id, _ops) +#define BPF_MAP_TYPE(_id, _ops) \ + [_id] = &_ops, +#include <linux/bpf_types.h> +#undef BPF_PROG_TYPE +#undef BPF_MAP_TYPE +}; + +/* + * If we're handed a bigger struct than we know of, ensure all the unknown bits + * are 0 - i.e. new user-space does not rely on any kernel feature extensions + * we don't know about yet. + * + * There is a ToCToU between this function call and the following + * copy_from_user() call. However, this is not a concern since this function is + * meant to be a future-proofing of bits. + */ +int bpf_check_uarg_tail_zero(void __user *uaddr, + size_t expected_size, + size_t actual_size) +{ + unsigned char __user *addr; + unsigned char __user *end; + unsigned char val; + int err; + + if (unlikely(actual_size > PAGE_SIZE)) /* silly large */ + return -E2BIG; + + if (unlikely(!access_ok(VERIFY_READ, uaddr, actual_size))) + return -EFAULT; + + if (actual_size <= expected_size) + return 0; + + addr = uaddr + expected_size; + end = uaddr + actual_size; + + for (; addr < end; addr++) { + err = get_user(val, addr); + if (err) + return err; + if (val) + return -E2BIG; + } + + return 0; +} + +const struct bpf_map_ops bpf_map_offload_ops = { + .map_alloc = bpf_map_offload_map_alloc, + .map_free = bpf_map_offload_map_free, + .map_check_btf = map_check_no_btf, +}; + +static struct bpf_map *find_and_alloc_map(union bpf_attr *attr) +{ + const struct bpf_map_ops *ops; + u32 type = attr->map_type; + struct bpf_map *map; + int err; + + if (type >= ARRAY_SIZE(bpf_map_types)) + return ERR_PTR(-EINVAL); + type = array_index_nospec(type, ARRAY_SIZE(bpf_map_types)); + ops = bpf_map_types[type]; + if (!ops) + return ERR_PTR(-EINVAL); + + if (ops->map_alloc_check) { + err = ops->map_alloc_check(attr); + if (err) + return ERR_PTR(err); + } + if (attr->map_ifindex) + ops = &bpf_map_offload_ops; + map = ops->map_alloc(attr); + if (IS_ERR(map)) + return map; + map->ops = ops; + map->map_type = type; + return map; +} + +void *bpf_map_area_alloc(size_t size, int numa_node) +{ + /* We definitely need __GFP_NORETRY, so OOM killer doesn't + * trigger under memory pressure as we really just want to + * fail instead. + */ + const gfp_t flags = __GFP_NOWARN | __GFP_NORETRY | __GFP_ZERO; + void *area; + + if (size <= (PAGE_SIZE << PAGE_ALLOC_COSTLY_ORDER)) { + area = kmalloc_node(size, GFP_USER | flags, numa_node); + if (area != NULL) + return area; + } + + return __vmalloc_node_flags_caller(size, numa_node, GFP_KERNEL | flags, + __builtin_return_address(0)); +} + +void bpf_map_area_free(void *area) +{ + kvfree(area); +} + +void bpf_map_init_from_attr(struct bpf_map *map, union bpf_attr *attr) +{ + map->map_type = attr->map_type; + map->key_size = attr->key_size; + map->value_size = attr->value_size; + map->max_entries = attr->max_entries; + map->map_flags = attr->map_flags; + map->numa_node = bpf_map_attr_numa_node(attr); +} + +int bpf_map_precharge_memlock(u32 pages) +{ + struct user_struct *user = get_current_user(); + unsigned long memlock_limit, cur; + + memlock_limit = rlimit(RLIMIT_MEMLOCK) >> PAGE_SHIFT; + cur = atomic_long_read(&user->locked_vm); + free_uid(user); + if (cur + pages > memlock_limit) + return -EPERM; + return 0; +} + +static int bpf_charge_memlock(struct user_struct *user, u32 pages) +{ + unsigned long memlock_limit = rlimit(RLIMIT_MEMLOCK) >> PAGE_SHIFT; + + if (atomic_long_add_return(pages, &user->locked_vm) > memlock_limit) { + atomic_long_sub(pages, &user->locked_vm); + return -EPERM; + } + return 0; +} + +static void bpf_uncharge_memlock(struct user_struct *user, u32 pages) +{ + atomic_long_sub(pages, &user->locked_vm); +} + +static int bpf_map_init_memlock(struct bpf_map *map) +{ + struct user_struct *user = get_current_user(); + int ret; + + ret = bpf_charge_memlock(user, map->pages); + if (ret) { + free_uid(user); + return ret; + } + map->user = user; + return ret; +} + +static void bpf_map_release_memlock(struct bpf_map *map) +{ + struct user_struct *user = map->user; + bpf_uncharge_memlock(user, map->pages); + free_uid(user); +} + +int bpf_map_charge_memlock(struct bpf_map *map, u32 pages) +{ + int ret; + + ret = bpf_charge_memlock(map->user, pages); + if (ret) + return ret; + map->pages += pages; + return ret; +} + +void bpf_map_uncharge_memlock(struct bpf_map *map, u32 pages) +{ + bpf_uncharge_memlock(map->user, pages); + map->pages -= pages; +} + +static int bpf_map_alloc_id(struct bpf_map *map) +{ + int id; + + idr_preload(GFP_KERNEL); + spin_lock_bh(&map_idr_lock); + id = idr_alloc_cyclic(&map_idr, map, 1, INT_MAX, GFP_ATOMIC); + if (id > 0) + map->id = id; + spin_unlock_bh(&map_idr_lock); + idr_preload_end(); + + if (WARN_ON_ONCE(!id)) + return -ENOSPC; + + return id > 0 ? 0 : id; +} + +void bpf_map_free_id(struct bpf_map *map, bool do_idr_lock) +{ + unsigned long flags; + + /* Offloaded maps are removed from the IDR store when their device + * disappears - even if someone holds an fd to them they are unusable, + * the memory is gone, all ops will fail; they are simply waiting for + * refcnt to drop to be freed. + */ + if (!map->id) + return; + + if (do_idr_lock) + spin_lock_irqsave(&map_idr_lock, flags); + else + __acquire(&map_idr_lock); + + idr_remove(&map_idr, map->id); + map->id = 0; + + if (do_idr_lock) + spin_unlock_irqrestore(&map_idr_lock, flags); + else + __release(&map_idr_lock); +} + +/* called from workqueue */ +static void bpf_map_free_deferred(struct work_struct *work) +{ + struct bpf_map *map = container_of(work, struct bpf_map, work); + + bpf_map_release_memlock(map); + security_bpf_map_free(map); + /* implementation dependent freeing */ + map->ops->map_free(map); +} + +static void bpf_map_put_uref(struct bpf_map *map) +{ + if (atomic_dec_and_test(&map->usercnt)) { + if (map->ops->map_release_uref) + map->ops->map_release_uref(map); + } +} + +/* decrement map refcnt and schedule it for freeing via workqueue + * (unrelying map implementation ops->map_free() might sleep) + */ +static void __bpf_map_put(struct bpf_map *map, bool do_idr_lock) +{ + if (atomic_dec_and_test(&map->refcnt)) { + /* bpf_map_free_id() must be called first */ + bpf_map_free_id(map, do_idr_lock); + btf_put(map->btf); + INIT_WORK(&map->work, bpf_map_free_deferred); + schedule_work(&map->work); + } +} + +void bpf_map_put(struct bpf_map *map) +{ + __bpf_map_put(map, true); +} +EXPORT_SYMBOL_GPL(bpf_map_put); + +void bpf_map_put_with_uref(struct bpf_map *map) +{ + bpf_map_put_uref(map); + bpf_map_put(map); +} + +static int bpf_map_release(struct inode *inode, struct file *filp) +{ + struct bpf_map *map = filp->private_data; + + if (map->ops->map_release) + map->ops->map_release(map, filp); + + bpf_map_put_with_uref(map); + return 0; +} + +#ifdef CONFIG_PROC_FS +static void bpf_map_show_fdinfo(struct seq_file *m, struct file *filp) +{ + const struct bpf_map *map = filp->private_data; + const struct bpf_array *array; + u32 owner_prog_type = 0; + u32 owner_jited = 0; + + if (map->map_type == BPF_MAP_TYPE_PROG_ARRAY) { + array = container_of(map, struct bpf_array, map); + owner_prog_type = array->owner_prog_type; + owner_jited = array->owner_jited; + } + + seq_printf(m, + "map_type:\t%u\n" + "key_size:\t%u\n" + "value_size:\t%u\n" + "max_entries:\t%u\n" + "map_flags:\t%#x\n" + "memlock:\t%llu\n" + "map_id:\t%u\n", + map->map_type, + map->key_size, + map->value_size, + map->max_entries, + map->map_flags, + map->pages * 1ULL << PAGE_SHIFT, + map->id); + + if (owner_prog_type) { + seq_printf(m, "owner_prog_type:\t%u\n", + owner_prog_type); + seq_printf(m, "owner_jited:\t%u\n", + owner_jited); + } +} +#endif + +static ssize_t bpf_dummy_read(struct file *filp, char __user *buf, size_t siz, + loff_t *ppos) +{ + /* We need this handler such that alloc_file() enables + * f_mode with FMODE_CAN_READ. + */ + return -EINVAL; +} + +static ssize_t bpf_dummy_write(struct file *filp, const char __user *buf, + size_t siz, loff_t *ppos) +{ + /* We need this handler such that alloc_file() enables + * f_mode with FMODE_CAN_WRITE. + */ + return -EINVAL; +} + +const struct file_operations bpf_map_fops = { +#ifdef CONFIG_PROC_FS + .show_fdinfo = bpf_map_show_fdinfo, +#endif + .release = bpf_map_release, + .read = bpf_dummy_read, + .write = bpf_dummy_write, +}; + +int bpf_map_new_fd(struct bpf_map *map, int flags) +{ + int ret; + + ret = security_bpf_map(map, OPEN_FMODE(flags)); + if (ret < 0) + return ret; + + return anon_inode_getfd("bpf-map", &bpf_map_fops, map, + flags | O_CLOEXEC); +} + +int bpf_get_file_flag(int flags) +{ + if ((flags & BPF_F_RDONLY) && (flags & BPF_F_WRONLY)) + return -EINVAL; + if (flags & BPF_F_RDONLY) + return O_RDONLY; + if (flags & BPF_F_WRONLY) + return O_WRONLY; + return O_RDWR; +} + +/* helper macro to check that unused fields 'union bpf_attr' are zero */ +#define CHECK_ATTR(CMD) \ + memchr_inv((void *) &attr->CMD##_LAST_FIELD + \ + sizeof(attr->CMD##_LAST_FIELD), 0, \ + sizeof(*attr) - \ + offsetof(union bpf_attr, CMD##_LAST_FIELD) - \ + sizeof(attr->CMD##_LAST_FIELD)) != NULL + +/* dst and src must have at least BPF_OBJ_NAME_LEN number of bytes. + * Return 0 on success and < 0 on error. + */ +static int bpf_obj_name_cpy(char *dst, const char *src) +{ + const char *end = src + BPF_OBJ_NAME_LEN; + + memset(dst, 0, BPF_OBJ_NAME_LEN); + + /* Copy all isalnum() and '_' char */ + while (src < end && *src) { + if (!isalnum(*src) && *src != '_') + return -EINVAL; + *dst++ = *src++; + } + + /* No '\0' found in BPF_OBJ_NAME_LEN number of bytes */ + if (src == end) + return -EINVAL; + + return 0; +} + +int map_check_no_btf(const struct bpf_map *map, + const struct btf_type *key_type, + const struct btf_type *value_type) +{ + return -ENOTSUPP; +} + +static int map_check_btf(const struct bpf_map *map, const struct btf *btf, + u32 btf_key_id, u32 btf_value_id) +{ + const struct btf_type *key_type, *value_type; + u32 key_size, value_size; + int ret = 0; + + key_type = btf_type_id_size(btf, &btf_key_id, &key_size); + if (!key_type || key_size != map->key_size) + return -EINVAL; + + value_type = btf_type_id_size(btf, &btf_value_id, &value_size); + if (!value_type || value_size != map->value_size) + return -EINVAL; + + if (map->ops->map_check_btf) + ret = map->ops->map_check_btf(map, key_type, value_type); + + return ret; +} + +#define BPF_MAP_CREATE_LAST_FIELD btf_value_type_id +/* called via syscall */ +static int map_create(union bpf_attr *attr) +{ + int numa_node = bpf_map_attr_numa_node(attr); + struct bpf_map *map; + int f_flags; + int err; + + err = CHECK_ATTR(BPF_MAP_CREATE); + if (err) + return -EINVAL; + + f_flags = bpf_get_file_flag(attr->map_flags); + if (f_flags < 0) + return f_flags; + + if (numa_node != NUMA_NO_NODE && + ((unsigned int)numa_node >= nr_node_ids || + !node_online(numa_node))) + return -EINVAL; + + /* find map type and init map: hashtable vs rbtree vs bloom vs ... */ + map = find_and_alloc_map(attr); + if (IS_ERR(map)) + return PTR_ERR(map); + + err = bpf_obj_name_cpy(map->name, attr->map_name); + if (err) + goto free_map_nouncharge; + + atomic_set(&map->refcnt, 1); + atomic_set(&map->usercnt, 1); + + if (attr->btf_key_type_id || attr->btf_value_type_id) { + struct btf *btf; + + if (!attr->btf_key_type_id || !attr->btf_value_type_id) { + err = -EINVAL; + goto free_map_nouncharge; + } + + btf = btf_get_by_fd(attr->btf_fd); + if (IS_ERR(btf)) { + err = PTR_ERR(btf); + goto free_map_nouncharge; + } + + err = map_check_btf(map, btf, attr->btf_key_type_id, + attr->btf_value_type_id); + if (err) { + btf_put(btf); + goto free_map_nouncharge; + } + + map->btf = btf; + map->btf_key_type_id = attr->btf_key_type_id; + map->btf_value_type_id = attr->btf_value_type_id; + } + + err = security_bpf_map_alloc(map); + if (err) + goto free_map_nouncharge; + + err = bpf_map_init_memlock(map); + if (err) + goto free_map_sec; + + err = bpf_map_alloc_id(map); + if (err) + goto free_map; + + err = bpf_map_new_fd(map, f_flags); + if (err < 0) { + /* failed to allocate fd. + * bpf_map_put_with_uref() is needed because the above + * bpf_map_alloc_id() has published the map + * to the userspace and the userspace may + * have refcnt-ed it through BPF_MAP_GET_FD_BY_ID. + */ + bpf_map_put_with_uref(map); + return err; + } + + return err; + +free_map: + bpf_map_release_memlock(map); +free_map_sec: + security_bpf_map_free(map); +free_map_nouncharge: + btf_put(map->btf); + map->ops->map_free(map); + return err; +} + +/* if error is returned, fd is released. + * On success caller should complete fd access with matching fdput() + */ +struct bpf_map *__bpf_map_get(struct fd f) +{ + if (!f.file) + return ERR_PTR(-EBADF); + if (f.file->f_op != &bpf_map_fops) { + fdput(f); + return ERR_PTR(-EINVAL); + } + + return f.file->private_data; +} + +/* prog's and map's refcnt limit */ +#define BPF_MAX_REFCNT 32768 + +struct bpf_map *bpf_map_inc(struct bpf_map *map, bool uref) +{ + if (atomic_inc_return(&map->refcnt) > BPF_MAX_REFCNT) { + atomic_dec(&map->refcnt); + return ERR_PTR(-EBUSY); + } + if (uref) + atomic_inc(&map->usercnt); + return map; +} +EXPORT_SYMBOL_GPL(bpf_map_inc); + +struct bpf_map *bpf_map_get_with_uref(u32 ufd) +{ + struct fd f = fdget(ufd); + struct bpf_map *map; + + map = __bpf_map_get(f); + if (IS_ERR(map)) + return map; + + map = bpf_map_inc(map, true); + fdput(f); + + return map; +} + +/* map_idr_lock should have been held */ +static struct bpf_map *bpf_map_inc_not_zero(struct bpf_map *map, + bool uref) +{ + int refold; + + refold = atomic_fetch_add_unless(&map->refcnt, 1, 0); + + if (refold >= BPF_MAX_REFCNT) { + __bpf_map_put(map, false); + return ERR_PTR(-EBUSY); + } + + if (!refold) + return ERR_PTR(-ENOENT); + + if (uref) + atomic_inc(&map->usercnt); + + return map; +} + +int __weak bpf_stackmap_copy(struct bpf_map *map, void *key, void *value) +{ + return -ENOTSUPP; +} + +/* last field in 'union bpf_attr' used by this command */ +#define BPF_MAP_LOOKUP_ELEM_LAST_FIELD value + +static int map_lookup_elem(union bpf_attr *attr) +{ + void __user *ukey = u64_to_user_ptr(attr->key); + void __user *uvalue = u64_to_user_ptr(attr->value); + int ufd = attr->map_fd; + struct bpf_map *map; + void *key, *value, *ptr; + u32 value_size; + struct fd f; + int err; + + if (CHECK_ATTR(BPF_MAP_LOOKUP_ELEM)) + return -EINVAL; + + f = fdget(ufd); + map = __bpf_map_get(f); + if (IS_ERR(map)) + return PTR_ERR(map); + + if (!(f.file->f_mode & FMODE_CAN_READ)) { + err = -EPERM; + goto err_put; + } + + key = memdup_user(ukey, map->key_size); + if (IS_ERR(key)) { + err = PTR_ERR(key); + goto err_put; + } + + if (map->map_type == BPF_MAP_TYPE_PERCPU_HASH || + map->map_type == BPF_MAP_TYPE_LRU_PERCPU_HASH || + map->map_type == BPF_MAP_TYPE_PERCPU_ARRAY) + value_size = round_up(map->value_size, 8) * num_possible_cpus(); + else if (IS_FD_MAP(map)) + value_size = sizeof(u32); + else + value_size = map->value_size; + + err = -ENOMEM; + value = kmalloc(value_size, GFP_USER | __GFP_NOWARN); + if (!value) + goto free_key; + + if (bpf_map_is_dev_bound(map)) { + err = bpf_map_offload_lookup_elem(map, key, value); + goto done; + } + + preempt_disable(); + this_cpu_inc(bpf_prog_active); + if (map->map_type == BPF_MAP_TYPE_PERCPU_HASH || + map->map_type == BPF_MAP_TYPE_LRU_PERCPU_HASH) { + err = bpf_percpu_hash_copy(map, key, value); + } else if (map->map_type == BPF_MAP_TYPE_PERCPU_ARRAY) { + err = bpf_percpu_array_copy(map, key, value); + } else if (map->map_type == BPF_MAP_TYPE_STACK_TRACE) { + err = bpf_stackmap_copy(map, key, value); + } else if (IS_FD_ARRAY(map)) { + err = bpf_fd_array_map_lookup_elem(map, key, value); + } else if (IS_FD_HASH(map)) { + err = bpf_fd_htab_map_lookup_elem(map, key, value); + } else if (map->map_type == BPF_MAP_TYPE_REUSEPORT_SOCKARRAY) { + err = bpf_fd_reuseport_array_lookup_elem(map, key, value); + } else { + rcu_read_lock(); + if (map->ops->map_lookup_elem_sys_only) + ptr = map->ops->map_lookup_elem_sys_only(map, key); + else + ptr = map->ops->map_lookup_elem(map, key); + if (ptr) + memcpy(value, ptr, value_size); + rcu_read_unlock(); + err = ptr ? 0 : -ENOENT; + } + this_cpu_dec(bpf_prog_active); + preempt_enable(); + +done: + if (err) + goto free_value; + + err = -EFAULT; + if (copy_to_user(uvalue, value, value_size) != 0) + goto free_value; + + err = 0; + +free_value: + kfree(value); +free_key: + kfree(key); +err_put: + fdput(f); + return err; +} + +static void maybe_wait_bpf_programs(struct bpf_map *map) +{ + /* Wait for any running BPF programs to complete so that + * userspace, when we return to it, knows that all programs + * that could be running use the new map value. + */ + if (map->map_type == BPF_MAP_TYPE_HASH_OF_MAPS || + map->map_type == BPF_MAP_TYPE_ARRAY_OF_MAPS) + synchronize_rcu(); +} + +#define BPF_MAP_UPDATE_ELEM_LAST_FIELD flags + +static int map_update_elem(union bpf_attr *attr) +{ + void __user *ukey = u64_to_user_ptr(attr->key); + void __user *uvalue = u64_to_user_ptr(attr->value); + int ufd = attr->map_fd; + struct bpf_map *map; + void *key, *value; + u32 value_size; + struct fd f; + int err; + + if (CHECK_ATTR(BPF_MAP_UPDATE_ELEM)) + return -EINVAL; + + f = fdget(ufd); + map = __bpf_map_get(f); + if (IS_ERR(map)) + return PTR_ERR(map); + + if (!(f.file->f_mode & FMODE_CAN_WRITE)) { + err = -EPERM; + goto err_put; + } + + key = memdup_user(ukey, map->key_size); + if (IS_ERR(key)) { + err = PTR_ERR(key); + goto err_put; + } + + if (map->map_type == BPF_MAP_TYPE_PERCPU_HASH || + map->map_type == BPF_MAP_TYPE_LRU_PERCPU_HASH || + map->map_type == BPF_MAP_TYPE_PERCPU_ARRAY) + value_size = round_up(map->value_size, 8) * num_possible_cpus(); + else + value_size = map->value_size; + + err = -ENOMEM; + value = kmalloc(value_size, GFP_USER | __GFP_NOWARN); + if (!value) + goto free_key; + + err = -EFAULT; + if (copy_from_user(value, uvalue, value_size) != 0) + goto free_value; + + /* Need to create a kthread, thus must support schedule */ + if (bpf_map_is_dev_bound(map)) { + err = bpf_map_offload_update_elem(map, key, value, attr->flags); + goto out; + } else if (map->map_type == BPF_MAP_TYPE_CPUMAP || + map->map_type == BPF_MAP_TYPE_SOCKHASH || + map->map_type == BPF_MAP_TYPE_SOCKMAP) { + err = map->ops->map_update_elem(map, key, value, attr->flags); + goto out; + } + + /* must increment bpf_prog_active to avoid kprobe+bpf triggering from + * inside bpf map update or delete otherwise deadlocks are possible + */ + preempt_disable(); + __this_cpu_inc(bpf_prog_active); + if (map->map_type == BPF_MAP_TYPE_PERCPU_HASH || + map->map_type == BPF_MAP_TYPE_LRU_PERCPU_HASH) { + err = bpf_percpu_hash_update(map, key, value, attr->flags); + } else if (map->map_type == BPF_MAP_TYPE_PERCPU_ARRAY) { + err = bpf_percpu_array_update(map, key, value, attr->flags); + } else if (IS_FD_ARRAY(map)) { + rcu_read_lock(); + err = bpf_fd_array_map_update_elem(map, f.file, key, value, + attr->flags); + rcu_read_unlock(); + } else if (map->map_type == BPF_MAP_TYPE_HASH_OF_MAPS) { + rcu_read_lock(); + err = bpf_fd_htab_map_update_elem(map, f.file, key, value, + attr->flags); + rcu_read_unlock(); + } else if (map->map_type == BPF_MAP_TYPE_REUSEPORT_SOCKARRAY) { + /* rcu_read_lock() is not needed */ + err = bpf_fd_reuseport_array_update_elem(map, key, value, + attr->flags); + } else { + rcu_read_lock(); + err = map->ops->map_update_elem(map, key, value, attr->flags); + rcu_read_unlock(); + } + __this_cpu_dec(bpf_prog_active); + preempt_enable(); + maybe_wait_bpf_programs(map); +out: +free_value: + kfree(value); +free_key: + kfree(key); +err_put: + fdput(f); + return err; +} + +#define BPF_MAP_DELETE_ELEM_LAST_FIELD key + +static int map_delete_elem(union bpf_attr *attr) +{ + void __user *ukey = u64_to_user_ptr(attr->key); + int ufd = attr->map_fd; + struct bpf_map *map; + struct fd f; + void *key; + int err; + + if (CHECK_ATTR(BPF_MAP_DELETE_ELEM)) + return -EINVAL; + + f = fdget(ufd); + map = __bpf_map_get(f); + if (IS_ERR(map)) + return PTR_ERR(map); + + if (!(f.file->f_mode & FMODE_CAN_WRITE)) { + err = -EPERM; + goto err_put; + } + + key = memdup_user(ukey, map->key_size); + if (IS_ERR(key)) { + err = PTR_ERR(key); + goto err_put; + } + + if (bpf_map_is_dev_bound(map)) { + err = bpf_map_offload_delete_elem(map, key); + goto out; + } + + preempt_disable(); + __this_cpu_inc(bpf_prog_active); + rcu_read_lock(); + err = map->ops->map_delete_elem(map, key); + rcu_read_unlock(); + __this_cpu_dec(bpf_prog_active); + preempt_enable(); + maybe_wait_bpf_programs(map); +out: + kfree(key); +err_put: + fdput(f); + return err; +} + +/* last field in 'union bpf_attr' used by this command */ +#define BPF_MAP_GET_NEXT_KEY_LAST_FIELD next_key + +static int map_get_next_key(union bpf_attr *attr) +{ + void __user *ukey = u64_to_user_ptr(attr->key); + void __user *unext_key = u64_to_user_ptr(attr->next_key); + int ufd = attr->map_fd; + struct bpf_map *map; + void *key, *next_key; + struct fd f; + int err; + + if (CHECK_ATTR(BPF_MAP_GET_NEXT_KEY)) + return -EINVAL; + + f = fdget(ufd); + map = __bpf_map_get(f); + if (IS_ERR(map)) + return PTR_ERR(map); + + if (!(f.file->f_mode & FMODE_CAN_READ)) { + err = -EPERM; + goto err_put; + } + + if (ukey) { + key = memdup_user(ukey, map->key_size); + if (IS_ERR(key)) { + err = PTR_ERR(key); + goto err_put; + } + } else { + key = NULL; + } + + err = -ENOMEM; + next_key = kmalloc(map->key_size, GFP_USER); + if (!next_key) + goto free_key; + + if (bpf_map_is_dev_bound(map)) { + err = bpf_map_offload_get_next_key(map, key, next_key); + goto out; + } + + rcu_read_lock(); + err = map->ops->map_get_next_key(map, key, next_key); + rcu_read_unlock(); +out: + if (err) + goto free_next_key; + + err = -EFAULT; + if (copy_to_user(unext_key, next_key, map->key_size) != 0) + goto free_next_key; + + err = 0; + +free_next_key: + kfree(next_key); +free_key: + kfree(key); +err_put: + fdput(f); + return err; +} + +static const struct bpf_prog_ops * const bpf_prog_types[] = { +#define BPF_PROG_TYPE(_id, _name) \ + [_id] = & _name ## _prog_ops, +#define BPF_MAP_TYPE(_id, _ops) +#include <linux/bpf_types.h> +#undef BPF_PROG_TYPE +#undef BPF_MAP_TYPE +}; + +static int find_prog_type(enum bpf_prog_type type, struct bpf_prog *prog) +{ + const struct bpf_prog_ops *ops; + + if (type >= ARRAY_SIZE(bpf_prog_types)) + return -EINVAL; + type = array_index_nospec(type, ARRAY_SIZE(bpf_prog_types)); + ops = bpf_prog_types[type]; + if (!ops) + return -EINVAL; + + if (!bpf_prog_is_dev_bound(prog->aux)) + prog->aux->ops = ops; + else + prog->aux->ops = &bpf_offload_prog_ops; + prog->type = type; + return 0; +} + +/* drop refcnt on maps used by eBPF program and free auxilary data */ +static void free_used_maps(struct bpf_prog_aux *aux) +{ + int i; + + if (aux->cgroup_storage) + bpf_cgroup_storage_release(aux->prog, aux->cgroup_storage); + + for (i = 0; i < aux->used_map_cnt; i++) + bpf_map_put(aux->used_maps[i]); + + kfree(aux->used_maps); +} + +int __bpf_prog_charge(struct user_struct *user, u32 pages) +{ + unsigned long memlock_limit = rlimit(RLIMIT_MEMLOCK) >> PAGE_SHIFT; + unsigned long user_bufs; + + if (user) { + user_bufs = atomic_long_add_return(pages, &user->locked_vm); + if (user_bufs > memlock_limit) { + atomic_long_sub(pages, &user->locked_vm); + return -EPERM; + } + } + + return 0; +} + +void __bpf_prog_uncharge(struct user_struct *user, u32 pages) +{ + if (user) + atomic_long_sub(pages, &user->locked_vm); +} + +static int bpf_prog_charge_memlock(struct bpf_prog *prog) +{ + struct user_struct *user = get_current_user(); + int ret; + + ret = __bpf_prog_charge(user, prog->pages); + if (ret) { + free_uid(user); + return ret; + } + + prog->aux->user = user; + return 0; +} + +static void bpf_prog_uncharge_memlock(struct bpf_prog *prog) +{ + struct user_struct *user = prog->aux->user; + + __bpf_prog_uncharge(user, prog->pages); + free_uid(user); +} + +static int bpf_prog_alloc_id(struct bpf_prog *prog) +{ + int id; + + idr_preload(GFP_KERNEL); + spin_lock_bh(&prog_idr_lock); + id = idr_alloc_cyclic(&prog_idr, prog, 1, INT_MAX, GFP_ATOMIC); + if (id > 0) + prog->aux->id = id; + spin_unlock_bh(&prog_idr_lock); + idr_preload_end(); + + /* id is in [1, INT_MAX) */ + if (WARN_ON_ONCE(!id)) + return -ENOSPC; + + return id > 0 ? 0 : id; +} + +void bpf_prog_free_id(struct bpf_prog *prog, bool do_idr_lock) +{ + /* cBPF to eBPF migrations are currently not in the idr store. + * Offloaded programs are removed from the store when their device + * disappears - even if someone grabs an fd to them they are unusable, + * simply waiting for refcnt to drop to be freed. + */ + if (!prog->aux->id) + return; + + if (do_idr_lock) + spin_lock_bh(&prog_idr_lock); + else + __acquire(&prog_idr_lock); + + idr_remove(&prog_idr, prog->aux->id); + prog->aux->id = 0; + + if (do_idr_lock) + spin_unlock_bh(&prog_idr_lock); + else + __release(&prog_idr_lock); +} + +static void __bpf_prog_put_rcu(struct rcu_head *rcu) +{ + struct bpf_prog_aux *aux = container_of(rcu, struct bpf_prog_aux, rcu); + + free_used_maps(aux); + bpf_prog_uncharge_memlock(aux->prog); + security_bpf_prog_free(aux); + bpf_prog_free(aux->prog); +} + +static void __bpf_prog_put(struct bpf_prog *prog, bool do_idr_lock) +{ + if (atomic_dec_and_test(&prog->aux->refcnt)) { + /* bpf_prog_free_id() must be called first */ + bpf_prog_free_id(prog, do_idr_lock); + bpf_prog_kallsyms_del_all(prog); + + call_rcu(&prog->aux->rcu, __bpf_prog_put_rcu); + } +} + +void bpf_prog_put(struct bpf_prog *prog) +{ + __bpf_prog_put(prog, true); +} +EXPORT_SYMBOL_GPL(bpf_prog_put); + +static int bpf_prog_release(struct inode *inode, struct file *filp) +{ + struct bpf_prog *prog = filp->private_data; + + bpf_prog_put(prog); + return 0; +} + +#ifdef CONFIG_PROC_FS +static void bpf_prog_show_fdinfo(struct seq_file *m, struct file *filp) +{ + const struct bpf_prog *prog = filp->private_data; + char prog_tag[sizeof(prog->tag) * 2 + 1] = { }; + + bin2hex(prog_tag, prog->tag, sizeof(prog->tag)); + seq_printf(m, + "prog_type:\t%u\n" + "prog_jited:\t%u\n" + "prog_tag:\t%s\n" + "memlock:\t%llu\n" + "prog_id:\t%u\n", + prog->type, + prog->jited, + prog_tag, + prog->pages * 1ULL << PAGE_SHIFT, + prog->aux->id); +} +#endif + +const struct file_operations bpf_prog_fops = { +#ifdef CONFIG_PROC_FS + .show_fdinfo = bpf_prog_show_fdinfo, +#endif + .release = bpf_prog_release, + .read = bpf_dummy_read, + .write = bpf_dummy_write, +}; + +int bpf_prog_new_fd(struct bpf_prog *prog) +{ + int ret; + + ret = security_bpf_prog(prog); + if (ret < 0) + return ret; + + return anon_inode_getfd("bpf-prog", &bpf_prog_fops, prog, + O_RDWR | O_CLOEXEC); +} + +static struct bpf_prog *____bpf_prog_get(struct fd f) +{ + if (!f.file) + return ERR_PTR(-EBADF); + if (f.file->f_op != &bpf_prog_fops) { + fdput(f); + return ERR_PTR(-EINVAL); + } + + return f.file->private_data; +} + +struct bpf_prog *bpf_prog_add(struct bpf_prog *prog, int i) +{ + if (atomic_add_return(i, &prog->aux->refcnt) > BPF_MAX_REFCNT) { + atomic_sub(i, &prog->aux->refcnt); + return ERR_PTR(-EBUSY); + } + return prog; +} +EXPORT_SYMBOL_GPL(bpf_prog_add); + +void bpf_prog_sub(struct bpf_prog *prog, int i) +{ + /* Only to be used for undoing previous bpf_prog_add() in some + * error path. We still know that another entity in our call + * path holds a reference to the program, thus atomic_sub() can + * be safely used in such cases! + */ + WARN_ON(atomic_sub_return(i, &prog->aux->refcnt) == 0); +} +EXPORT_SYMBOL_GPL(bpf_prog_sub); + +struct bpf_prog *bpf_prog_inc(struct bpf_prog *prog) +{ + return bpf_prog_add(prog, 1); +} +EXPORT_SYMBOL_GPL(bpf_prog_inc); + +/* prog_idr_lock should have been held */ +struct bpf_prog *bpf_prog_inc_not_zero(struct bpf_prog *prog) +{ + int refold; + + refold = atomic_fetch_add_unless(&prog->aux->refcnt, 1, 0); + + if (refold >= BPF_MAX_REFCNT) { + __bpf_prog_put(prog, false); + return ERR_PTR(-EBUSY); + } + + if (!refold) + return ERR_PTR(-ENOENT); + + return prog; +} +EXPORT_SYMBOL_GPL(bpf_prog_inc_not_zero); + +bool bpf_prog_get_ok(struct bpf_prog *prog, + enum bpf_prog_type *attach_type, bool attach_drv) +{ + /* not an attachment, just a refcount inc, always allow */ + if (!attach_type) + return true; + + if (prog->type != *attach_type) + return false; + if (bpf_prog_is_dev_bound(prog->aux) && !attach_drv) + return false; + + return true; +} + +static struct bpf_prog *__bpf_prog_get(u32 ufd, enum bpf_prog_type *attach_type, + bool attach_drv) +{ + struct fd f = fdget(ufd); + struct bpf_prog *prog; + + prog = ____bpf_prog_get(f); + if (IS_ERR(prog)) + return prog; + if (!bpf_prog_get_ok(prog, attach_type, attach_drv)) { + prog = ERR_PTR(-EINVAL); + goto out; + } + + prog = bpf_prog_inc(prog); +out: + fdput(f); + return prog; +} + +struct bpf_prog *bpf_prog_get(u32 ufd) +{ + return __bpf_prog_get(ufd, NULL, false); +} + +struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, enum bpf_prog_type type, + bool attach_drv) +{ + return __bpf_prog_get(ufd, &type, attach_drv); +} +EXPORT_SYMBOL_GPL(bpf_prog_get_type_dev); + +/* Initially all BPF programs could be loaded w/o specifying + * expected_attach_type. Later for some of them specifying expected_attach_type + * at load time became required so that program could be validated properly. + * Programs of types that are allowed to be loaded both w/ and w/o (for + * backward compatibility) expected_attach_type, should have the default attach + * type assigned to expected_attach_type for the latter case, so that it can be + * validated later at attach time. + * + * bpf_prog_load_fixup_attach_type() sets expected_attach_type in @attr if + * prog type requires it but has some attach types that have to be backward + * compatible. + */ +static void bpf_prog_load_fixup_attach_type(union bpf_attr *attr) +{ + switch (attr->prog_type) { + case BPF_PROG_TYPE_CGROUP_SOCK: + /* Unfortunately BPF_ATTACH_TYPE_UNSPEC enumeration doesn't + * exist so checking for non-zero is the way to go here. + */ + if (!attr->expected_attach_type) + attr->expected_attach_type = + BPF_CGROUP_INET_SOCK_CREATE; + break; + } +} + +static int +bpf_prog_load_check_attach_type(enum bpf_prog_type prog_type, + enum bpf_attach_type expected_attach_type) +{ + switch (prog_type) { + case BPF_PROG_TYPE_CGROUP_SOCK: + switch (expected_attach_type) { + case BPF_CGROUP_INET_SOCK_CREATE: + case BPF_CGROUP_INET4_POST_BIND: + case BPF_CGROUP_INET6_POST_BIND: + return 0; + default: + return -EINVAL; + } + case BPF_PROG_TYPE_CGROUP_SOCK_ADDR: + switch (expected_attach_type) { + case BPF_CGROUP_INET4_BIND: + case BPF_CGROUP_INET6_BIND: + case BPF_CGROUP_INET4_CONNECT: + case BPF_CGROUP_INET6_CONNECT: + case BPF_CGROUP_UDP4_SENDMSG: + case BPF_CGROUP_UDP6_SENDMSG: + case BPF_CGROUP_UDP4_RECVMSG: + case BPF_CGROUP_UDP6_RECVMSG: + return 0; + default: + return -EINVAL; + } + default: + return 0; + } +} + +/* last field in 'union bpf_attr' used by this command */ +#define BPF_PROG_LOAD_LAST_FIELD expected_attach_type + +static int bpf_prog_load(union bpf_attr *attr) +{ + enum bpf_prog_type type = attr->prog_type; + struct bpf_prog *prog; + int err; + char license[128]; + bool is_gpl; + + if (CHECK_ATTR(BPF_PROG_LOAD)) + return -EINVAL; + + if (attr->prog_flags & ~(BPF_F_STRICT_ALIGNMENT | BPF_F_ANY_ALIGNMENT)) + return -EINVAL; + + if (!IS_ENABLED(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && + (attr->prog_flags & BPF_F_ANY_ALIGNMENT) && + !capable(CAP_SYS_ADMIN)) + return -EPERM; + + /* copy eBPF program license from user space */ + if (strncpy_from_user(license, u64_to_user_ptr(attr->license), + sizeof(license) - 1) < 0) + return -EFAULT; + license[sizeof(license) - 1] = 0; + + /* eBPF programs must be GPL compatible to use GPL-ed functions */ + is_gpl = license_is_gpl_compatible(license); + + if (attr->insn_cnt == 0 || attr->insn_cnt > BPF_MAXINSNS) + return -E2BIG; + + if (type == BPF_PROG_TYPE_KPROBE && + attr->kern_version != LINUX_VERSION_CODE) + return -EINVAL; + + if (type != BPF_PROG_TYPE_SOCKET_FILTER && + type != BPF_PROG_TYPE_CGROUP_SKB && + !capable(CAP_SYS_ADMIN)) + return -EPERM; + + bpf_prog_load_fixup_attach_type(attr); + if (bpf_prog_load_check_attach_type(type, attr->expected_attach_type)) + return -EINVAL; + + /* plain bpf_prog allocation */ + prog = bpf_prog_alloc(bpf_prog_size(attr->insn_cnt), GFP_USER); + if (!prog) + return -ENOMEM; + + prog->expected_attach_type = attr->expected_attach_type; + + prog->aux->offload_requested = !!attr->prog_ifindex; + + err = security_bpf_prog_alloc(prog->aux); + if (err) + goto free_prog_nouncharge; + + err = bpf_prog_charge_memlock(prog); + if (err) + goto free_prog_sec; + + prog->len = attr->insn_cnt; + + err = -EFAULT; + if (copy_from_user(prog->insns, u64_to_user_ptr(attr->insns), + bpf_prog_insn_size(prog)) != 0) + goto free_prog; + + prog->orig_prog = NULL; + prog->jited = 0; + + atomic_set(&prog->aux->refcnt, 1); + prog->gpl_compatible = is_gpl ? 1 : 0; + + if (bpf_prog_is_dev_bound(prog->aux)) { + err = bpf_prog_offload_init(prog, attr); + if (err) + goto free_prog; + } + + /* find program type: socket_filter vs tracing_filter */ + err = find_prog_type(type, prog); + if (err < 0) + goto free_prog; + + prog->aux->load_time = ktime_get_boot_ns(); + err = bpf_obj_name_cpy(prog->aux->name, attr->prog_name); + if (err) + goto free_prog; + + /* run eBPF verifier */ + err = bpf_check(&prog, attr); + if (err < 0) + goto free_used_maps; + + prog = bpf_prog_select_runtime(prog, &err); + if (err < 0) + goto free_used_maps; + + err = bpf_prog_alloc_id(prog); + if (err) + goto free_used_maps; + + /* Upon success of bpf_prog_alloc_id(), the BPF prog is + * effectively publicly exposed. However, retrieving via + * bpf_prog_get_fd_by_id() will take another reference, + * therefore it cannot be gone underneath us. + * + * Only for the time /after/ successful bpf_prog_new_fd() + * and before returning to userspace, we might just hold + * one reference and any parallel close on that fd could + * rip everything out. Hence, below notifications must + * happen before bpf_prog_new_fd(). + * + * Also, any failure handling from this point onwards must + * be using bpf_prog_put() given the program is exposed. + */ + bpf_prog_kallsyms_add(prog); + + err = bpf_prog_new_fd(prog); + if (err < 0) + bpf_prog_put(prog); + return err; + +free_used_maps: + bpf_prog_kallsyms_del_subprogs(prog); + free_used_maps(prog->aux); +free_prog: + bpf_prog_uncharge_memlock(prog); +free_prog_sec: + security_bpf_prog_free(prog->aux); +free_prog_nouncharge: + bpf_prog_free(prog); + return err; +} + +#define BPF_OBJ_LAST_FIELD file_flags + +static int bpf_obj_pin(const union bpf_attr *attr) +{ + if (CHECK_ATTR(BPF_OBJ) || attr->file_flags != 0) + return -EINVAL; + + return bpf_obj_pin_user(attr->bpf_fd, u64_to_user_ptr(attr->pathname)); +} + +static int bpf_obj_get(const union bpf_attr *attr) +{ + if (CHECK_ATTR(BPF_OBJ) || attr->bpf_fd != 0 || + attr->file_flags & ~BPF_OBJ_FLAG_MASK) + return -EINVAL; + + return bpf_obj_get_user(u64_to_user_ptr(attr->pathname), + attr->file_flags); +} + +struct bpf_raw_tracepoint { + struct bpf_raw_event_map *btp; + struct bpf_prog *prog; +}; + +static int bpf_raw_tracepoint_release(struct inode *inode, struct file *filp) +{ + struct bpf_raw_tracepoint *raw_tp = filp->private_data; + + if (raw_tp->prog) { + bpf_probe_unregister(raw_tp->btp, raw_tp->prog); + bpf_prog_put(raw_tp->prog); + } + kfree(raw_tp); + return 0; +} + +static const struct file_operations bpf_raw_tp_fops = { + .release = bpf_raw_tracepoint_release, + .read = bpf_dummy_read, + .write = bpf_dummy_write, +}; + +#define BPF_RAW_TRACEPOINT_OPEN_LAST_FIELD raw_tracepoint.prog_fd + +static int bpf_raw_tracepoint_open(const union bpf_attr *attr) +{ + struct bpf_raw_tracepoint *raw_tp; + struct bpf_raw_event_map *btp; + struct bpf_prog *prog; + char tp_name[128]; + int tp_fd, err; + + if (strncpy_from_user(tp_name, u64_to_user_ptr(attr->raw_tracepoint.name), + sizeof(tp_name) - 1) < 0) + return -EFAULT; + tp_name[sizeof(tp_name) - 1] = 0; + + btp = bpf_find_raw_tracepoint(tp_name); + if (!btp) + return -ENOENT; + + raw_tp = kzalloc(sizeof(*raw_tp), GFP_USER); + if (!raw_tp) + return -ENOMEM; + raw_tp->btp = btp; + + prog = bpf_prog_get_type(attr->raw_tracepoint.prog_fd, + BPF_PROG_TYPE_RAW_TRACEPOINT); + if (IS_ERR(prog)) { + err = PTR_ERR(prog); + goto out_free_tp; + } + + err = bpf_probe_register(raw_tp->btp, prog); + if (err) + goto out_put_prog; + + raw_tp->prog = prog; + tp_fd = anon_inode_getfd("bpf-raw-tracepoint", &bpf_raw_tp_fops, raw_tp, + O_CLOEXEC); + if (tp_fd < 0) { + bpf_probe_unregister(raw_tp->btp, prog); + err = tp_fd; + goto out_put_prog; + } + return tp_fd; + +out_put_prog: + bpf_prog_put(prog); +out_free_tp: + kfree(raw_tp); + return err; +} + +static int bpf_prog_attach_check_attach_type(const struct bpf_prog *prog, + enum bpf_attach_type attach_type) +{ + switch (prog->type) { + case BPF_PROG_TYPE_CGROUP_SOCK: + case BPF_PROG_TYPE_CGROUP_SOCK_ADDR: + return attach_type == prog->expected_attach_type ? 0 : -EINVAL; + default: + return 0; + } +} + +#define BPF_PROG_ATTACH_LAST_FIELD attach_flags + +#define BPF_F_ATTACH_MASK \ + (BPF_F_ALLOW_OVERRIDE | BPF_F_ALLOW_MULTI) + +static int bpf_prog_attach(const union bpf_attr *attr) +{ + enum bpf_prog_type ptype; + struct bpf_prog *prog; + int ret; + + if (!capable(CAP_NET_ADMIN)) + return -EPERM; + + if (CHECK_ATTR(BPF_PROG_ATTACH)) + return -EINVAL; + + if (attr->attach_flags & ~BPF_F_ATTACH_MASK) + return -EINVAL; + + switch (attr->attach_type) { + case BPF_CGROUP_INET_INGRESS: + case BPF_CGROUP_INET_EGRESS: + ptype = BPF_PROG_TYPE_CGROUP_SKB; + break; + case BPF_CGROUP_INET_SOCK_CREATE: + case BPF_CGROUP_INET4_POST_BIND: + case BPF_CGROUP_INET6_POST_BIND: + ptype = BPF_PROG_TYPE_CGROUP_SOCK; + break; + case BPF_CGROUP_INET4_BIND: + case BPF_CGROUP_INET6_BIND: + case BPF_CGROUP_INET4_CONNECT: + case BPF_CGROUP_INET6_CONNECT: + case BPF_CGROUP_UDP4_SENDMSG: + case BPF_CGROUP_UDP6_SENDMSG: + case BPF_CGROUP_UDP4_RECVMSG: + case BPF_CGROUP_UDP6_RECVMSG: + ptype = BPF_PROG_TYPE_CGROUP_SOCK_ADDR; + break; + case BPF_CGROUP_SOCK_OPS: + ptype = BPF_PROG_TYPE_SOCK_OPS; + break; + case BPF_CGROUP_DEVICE: + ptype = BPF_PROG_TYPE_CGROUP_DEVICE; + break; + case BPF_SK_MSG_VERDICT: + ptype = BPF_PROG_TYPE_SK_MSG; + break; + case BPF_SK_SKB_STREAM_PARSER: + case BPF_SK_SKB_STREAM_VERDICT: + ptype = BPF_PROG_TYPE_SK_SKB; + break; + case BPF_LIRC_MODE2: + ptype = BPF_PROG_TYPE_LIRC_MODE2; + break; + default: + return -EINVAL; + } + + prog = bpf_prog_get_type(attr->attach_bpf_fd, ptype); + if (IS_ERR(prog)) + return PTR_ERR(prog); + + if (bpf_prog_attach_check_attach_type(prog, attr->attach_type)) { + bpf_prog_put(prog); + return -EINVAL; + } + + switch (ptype) { + case BPF_PROG_TYPE_SK_SKB: + case BPF_PROG_TYPE_SK_MSG: + ret = sockmap_get_from_fd(attr, ptype, prog); + break; + case BPF_PROG_TYPE_LIRC_MODE2: + ret = lirc_prog_attach(attr, prog); + break; + default: + ret = cgroup_bpf_prog_attach(attr, ptype, prog); + } + + if (ret) + bpf_prog_put(prog); + return ret; +} + +#define BPF_PROG_DETACH_LAST_FIELD attach_type + +static int bpf_prog_detach(const union bpf_attr *attr) +{ + enum bpf_prog_type ptype; + + if (!capable(CAP_NET_ADMIN)) + return -EPERM; + + if (CHECK_ATTR(BPF_PROG_DETACH)) + return -EINVAL; + + switch (attr->attach_type) { + case BPF_CGROUP_INET_INGRESS: + case BPF_CGROUP_INET_EGRESS: + ptype = BPF_PROG_TYPE_CGROUP_SKB; + break; + case BPF_CGROUP_INET_SOCK_CREATE: + case BPF_CGROUP_INET4_POST_BIND: + case BPF_CGROUP_INET6_POST_BIND: + ptype = BPF_PROG_TYPE_CGROUP_SOCK; + break; + case BPF_CGROUP_INET4_BIND: + case BPF_CGROUP_INET6_BIND: + case BPF_CGROUP_INET4_CONNECT: + case BPF_CGROUP_INET6_CONNECT: + case BPF_CGROUP_UDP4_SENDMSG: + case BPF_CGROUP_UDP6_SENDMSG: + case BPF_CGROUP_UDP4_RECVMSG: + case BPF_CGROUP_UDP6_RECVMSG: + ptype = BPF_PROG_TYPE_CGROUP_SOCK_ADDR; + break; + case BPF_CGROUP_SOCK_OPS: + ptype = BPF_PROG_TYPE_SOCK_OPS; + break; + case BPF_CGROUP_DEVICE: + ptype = BPF_PROG_TYPE_CGROUP_DEVICE; + break; + case BPF_SK_MSG_VERDICT: + return sockmap_get_from_fd(attr, BPF_PROG_TYPE_SK_MSG, NULL); + case BPF_SK_SKB_STREAM_PARSER: + case BPF_SK_SKB_STREAM_VERDICT: + return sockmap_get_from_fd(attr, BPF_PROG_TYPE_SK_SKB, NULL); + case BPF_LIRC_MODE2: + return lirc_prog_detach(attr); + default: + return -EINVAL; + } + + return cgroup_bpf_prog_detach(attr, ptype); +} + +#define BPF_PROG_QUERY_LAST_FIELD query.prog_cnt + +static int bpf_prog_query(const union bpf_attr *attr, + union bpf_attr __user *uattr) +{ + if (!capable(CAP_NET_ADMIN)) + return -EPERM; + if (CHECK_ATTR(BPF_PROG_QUERY)) + return -EINVAL; + if (attr->query.query_flags & ~BPF_F_QUERY_EFFECTIVE) + return -EINVAL; + + switch (attr->query.attach_type) { + case BPF_CGROUP_INET_INGRESS: + case BPF_CGROUP_INET_EGRESS: + case BPF_CGROUP_INET_SOCK_CREATE: + case BPF_CGROUP_INET4_BIND: + case BPF_CGROUP_INET6_BIND: + case BPF_CGROUP_INET4_POST_BIND: + case BPF_CGROUP_INET6_POST_BIND: + case BPF_CGROUP_INET4_CONNECT: + case BPF_CGROUP_INET6_CONNECT: + case BPF_CGROUP_UDP4_SENDMSG: + case BPF_CGROUP_UDP6_SENDMSG: + case BPF_CGROUP_UDP4_RECVMSG: + case BPF_CGROUP_UDP6_RECVMSG: + case BPF_CGROUP_SOCK_OPS: + case BPF_CGROUP_DEVICE: + break; + case BPF_LIRC_MODE2: + return lirc_prog_query(attr, uattr); + default: + return -EINVAL; + } + + return cgroup_bpf_prog_query(attr, uattr); +} + +#define BPF_PROG_TEST_RUN_LAST_FIELD test.duration + +static int bpf_prog_test_run(const union bpf_attr *attr, + union bpf_attr __user *uattr) +{ + struct bpf_prog *prog; + int ret = -ENOTSUPP; + + if (!capable(CAP_SYS_ADMIN)) + return -EPERM; + if (CHECK_ATTR(BPF_PROG_TEST_RUN)) + return -EINVAL; + + prog = bpf_prog_get(attr->test.prog_fd); + if (IS_ERR(prog)) + return PTR_ERR(prog); + + if (prog->aux->ops->test_run) + ret = prog->aux->ops->test_run(prog, attr, uattr); + + bpf_prog_put(prog); + return ret; +} + +#define BPF_OBJ_GET_NEXT_ID_LAST_FIELD next_id + +static int bpf_obj_get_next_id(const union bpf_attr *attr, + union bpf_attr __user *uattr, + struct idr *idr, + spinlock_t *lock) +{ + u32 next_id = attr->start_id; + int err = 0; + + if (CHECK_ATTR(BPF_OBJ_GET_NEXT_ID) || next_id >= INT_MAX) + return -EINVAL; + + if (!capable(CAP_SYS_ADMIN)) + return -EPERM; + + next_id++; + spin_lock_bh(lock); + if (!idr_get_next(idr, &next_id)) + err = -ENOENT; + spin_unlock_bh(lock); + + if (!err) + err = put_user(next_id, &uattr->next_id); + + return err; +} + +#define BPF_PROG_GET_FD_BY_ID_LAST_FIELD prog_id + +static int bpf_prog_get_fd_by_id(const union bpf_attr *attr) +{ + struct bpf_prog *prog; + u32 id = attr->prog_id; + int fd; + + if (CHECK_ATTR(BPF_PROG_GET_FD_BY_ID)) + return -EINVAL; + + if (!capable(CAP_SYS_ADMIN)) + return -EPERM; + + spin_lock_bh(&prog_idr_lock); + prog = idr_find(&prog_idr, id); + if (prog) + prog = bpf_prog_inc_not_zero(prog); + else + prog = ERR_PTR(-ENOENT); + spin_unlock_bh(&prog_idr_lock); + + if (IS_ERR(prog)) + return PTR_ERR(prog); + + fd = bpf_prog_new_fd(prog); + if (fd < 0) + bpf_prog_put(prog); + + return fd; +} + +#define BPF_MAP_GET_FD_BY_ID_LAST_FIELD open_flags + +static int bpf_map_get_fd_by_id(const union bpf_attr *attr) +{ + struct bpf_map *map; + u32 id = attr->map_id; + int f_flags; + int fd; + + if (CHECK_ATTR(BPF_MAP_GET_FD_BY_ID) || + attr->open_flags & ~BPF_OBJ_FLAG_MASK) + return -EINVAL; + + if (!capable(CAP_SYS_ADMIN)) + return -EPERM; + + f_flags = bpf_get_file_flag(attr->open_flags); + if (f_flags < 0) + return f_flags; + + spin_lock_bh(&map_idr_lock); + map = idr_find(&map_idr, id); + if (map) + map = bpf_map_inc_not_zero(map, true); + else + map = ERR_PTR(-ENOENT); + spin_unlock_bh(&map_idr_lock); + + if (IS_ERR(map)) + return PTR_ERR(map); + + fd = bpf_map_new_fd(map, f_flags); + if (fd < 0) + bpf_map_put_with_uref(map); + + return fd; +} + +static const struct bpf_map *bpf_map_from_imm(const struct bpf_prog *prog, + unsigned long addr) +{ + int i; + + for (i = 0; i < prog->aux->used_map_cnt; i++) + if (prog->aux->used_maps[i] == (void *)addr) + return prog->aux->used_maps[i]; + return NULL; +} + +static struct bpf_insn *bpf_insn_prepare_dump(const struct bpf_prog *prog, + const struct cred *f_cred) +{ + const struct bpf_map *map; + struct bpf_insn *insns; + u64 imm; + int i; + + insns = kmemdup(prog->insnsi, bpf_prog_insn_size(prog), + GFP_USER); + if (!insns) + return insns; + + for (i = 0; i < prog->len; i++) { + if (insns[i].code == (BPF_JMP | BPF_TAIL_CALL)) { + insns[i].code = BPF_JMP | BPF_CALL; + insns[i].imm = BPF_FUNC_tail_call; + /* fall-through */ + } + if (insns[i].code == (BPF_JMP | BPF_CALL) || + insns[i].code == (BPF_JMP | BPF_CALL_ARGS)) { + if (insns[i].code == (BPF_JMP | BPF_CALL_ARGS)) + insns[i].code = BPF_JMP | BPF_CALL; + if (!bpf_dump_raw_ok(f_cred)) + insns[i].imm = 0; + continue; + } + + if (insns[i].code != (BPF_LD | BPF_IMM | BPF_DW)) + continue; + + imm = ((u64)insns[i + 1].imm << 32) | (u32)insns[i].imm; + map = bpf_map_from_imm(prog, imm); + if (map) { + insns[i].src_reg = BPF_PSEUDO_MAP_FD; + insns[i].imm = map->id; + insns[i + 1].imm = 0; + continue; + } + + if (!bpf_dump_raw_ok(f_cred) && + imm == (unsigned long)prog->aux) { + insns[i].imm = 0; + insns[i + 1].imm = 0; + continue; + } + } + + return insns; +} + +static int bpf_prog_get_info_by_fd(struct file *file, + struct bpf_prog *prog, + const union bpf_attr *attr, + union bpf_attr __user *uattr) +{ + struct bpf_prog_info __user *uinfo = u64_to_user_ptr(attr->info.info); + struct bpf_prog_info info; + u32 info_len = attr->info.info_len; + char __user *uinsns; + u32 ulen; + int err; + + err = bpf_check_uarg_tail_zero(uinfo, sizeof(info), info_len); + if (err) + return err; + info_len = min_t(u32, sizeof(info), info_len); + + memset(&info, 0, sizeof(info)); + if (copy_from_user(&info, uinfo, info_len)) + return -EFAULT; + + info.type = prog->type; + info.id = prog->aux->id; + info.load_time = prog->aux->load_time; + info.created_by_uid = from_kuid_munged(current_user_ns(), + prog->aux->user->uid); + info.gpl_compatible = prog->gpl_compatible; + + memcpy(info.tag, prog->tag, sizeof(prog->tag)); + memcpy(info.name, prog->aux->name, sizeof(prog->aux->name)); + + ulen = info.nr_map_ids; + info.nr_map_ids = prog->aux->used_map_cnt; + ulen = min_t(u32, info.nr_map_ids, ulen); + if (ulen) { + u32 __user *user_map_ids = u64_to_user_ptr(info.map_ids); + u32 i; + + for (i = 0; i < ulen; i++) + if (put_user(prog->aux->used_maps[i]->id, + &user_map_ids[i])) + return -EFAULT; + } + + if (!capable(CAP_SYS_ADMIN)) { + info.jited_prog_len = 0; + info.xlated_prog_len = 0; + info.nr_jited_ksyms = 0; + info.nr_jited_func_lens = 0; + goto done; + } + + ulen = info.xlated_prog_len; + info.xlated_prog_len = bpf_prog_insn_size(prog); + if (info.xlated_prog_len && ulen) { + struct bpf_insn *insns_sanitized; + bool fault; + + if (prog->blinded && !bpf_dump_raw_ok(file->f_cred)) { + info.xlated_prog_insns = 0; + goto done; + } + insns_sanitized = bpf_insn_prepare_dump(prog, file->f_cred); + if (!insns_sanitized) + return -ENOMEM; + uinsns = u64_to_user_ptr(info.xlated_prog_insns); + ulen = min_t(u32, info.xlated_prog_len, ulen); + fault = copy_to_user(uinsns, insns_sanitized, ulen); + kfree(insns_sanitized); + if (fault) + return -EFAULT; + } + + if (bpf_prog_is_dev_bound(prog->aux)) { + err = bpf_prog_offload_info_fill(&info, prog); + if (err) + return err; + goto done; + } + + /* NOTE: the following code is supposed to be skipped for offload. + * bpf_prog_offload_info_fill() is the place to fill similar fields + * for offload. + */ + ulen = info.jited_prog_len; + if (prog->aux->func_cnt) { + u32 i; + + info.jited_prog_len = 0; + for (i = 0; i < prog->aux->func_cnt; i++) + info.jited_prog_len += prog->aux->func[i]->jited_len; + } else { + info.jited_prog_len = prog->jited_len; + } + + if (info.jited_prog_len && ulen) { + if (bpf_dump_raw_ok(file->f_cred)) { + uinsns = u64_to_user_ptr(info.jited_prog_insns); + ulen = min_t(u32, info.jited_prog_len, ulen); + + /* for multi-function programs, copy the JITed + * instructions for all the functions + */ + if (prog->aux->func_cnt) { + u32 len, free, i; + u8 *img; + + free = ulen; + for (i = 0; i < prog->aux->func_cnt; i++) { + len = prog->aux->func[i]->jited_len; + len = min_t(u32, len, free); + img = (u8 *) prog->aux->func[i]->bpf_func; + if (copy_to_user(uinsns, img, len)) + return -EFAULT; + uinsns += len; + free -= len; + if (!free) + break; + } + } else { + if (copy_to_user(uinsns, prog->bpf_func, ulen)) + return -EFAULT; + } + } else { + info.jited_prog_insns = 0; + } + } + + ulen = info.nr_jited_ksyms; + info.nr_jited_ksyms = prog->aux->func_cnt; + if (info.nr_jited_ksyms && ulen) { + if (bpf_dump_raw_ok(file->f_cred)) { + u64 __user *user_ksyms; + ulong ksym_addr; + u32 i; + + /* copy the address of the kernel symbol + * corresponding to each function + */ + ulen = min_t(u32, info.nr_jited_ksyms, ulen); + user_ksyms = u64_to_user_ptr(info.jited_ksyms); + for (i = 0; i < ulen; i++) { + ksym_addr = (ulong) prog->aux->func[i]->bpf_func; + ksym_addr &= PAGE_MASK; + if (put_user((u64) ksym_addr, &user_ksyms[i])) + return -EFAULT; + } + } else { + info.jited_ksyms = 0; + } + } + + ulen = info.nr_jited_func_lens; + info.nr_jited_func_lens = prog->aux->func_cnt; + if (info.nr_jited_func_lens && ulen) { + if (bpf_dump_raw_ok(file->f_cred)) { + u32 __user *user_lens; + u32 func_len, i; + + /* copy the JITed image lengths for each function */ + ulen = min_t(u32, info.nr_jited_func_lens, ulen); + user_lens = u64_to_user_ptr(info.jited_func_lens); + for (i = 0; i < ulen; i++) { + func_len = prog->aux->func[i]->jited_len; + if (put_user(func_len, &user_lens[i])) + return -EFAULT; + } + } else { + info.jited_func_lens = 0; + } + } + +done: + if (copy_to_user(uinfo, &info, info_len) || + put_user(info_len, &uattr->info.info_len)) + return -EFAULT; + + return 0; +} + +static int bpf_map_get_info_by_fd(struct file *file, + struct bpf_map *map, + const union bpf_attr *attr, + union bpf_attr __user *uattr) +{ + struct bpf_map_info __user *uinfo = u64_to_user_ptr(attr->info.info); + struct bpf_map_info info; + u32 info_len = attr->info.info_len; + int err; + + err = bpf_check_uarg_tail_zero(uinfo, sizeof(info), info_len); + if (err) + return err; + info_len = min_t(u32, sizeof(info), info_len); + + memset(&info, 0, sizeof(info)); + info.type = map->map_type; + info.id = map->id; + info.key_size = map->key_size; + info.value_size = map->value_size; + info.max_entries = map->max_entries; + info.map_flags = map->map_flags; + memcpy(info.name, map->name, sizeof(map->name)); + + if (map->btf) { + info.btf_id = btf_id(map->btf); + info.btf_key_type_id = map->btf_key_type_id; + info.btf_value_type_id = map->btf_value_type_id; + } + + if (bpf_map_is_dev_bound(map)) { + err = bpf_map_offload_info_fill(&info, map); + if (err) + return err; + } + + if (copy_to_user(uinfo, &info, info_len) || + put_user(info_len, &uattr->info.info_len)) + return -EFAULT; + + return 0; +} + +static int bpf_btf_get_info_by_fd(struct file *file, + struct btf *btf, + const union bpf_attr *attr, + union bpf_attr __user *uattr) +{ + struct bpf_btf_info __user *uinfo = u64_to_user_ptr(attr->info.info); + u32 info_len = attr->info.info_len; + int err; + + err = bpf_check_uarg_tail_zero(uinfo, sizeof(*uinfo), info_len); + if (err) + return err; + + return btf_get_info_by_fd(btf, attr, uattr); +} + +#define BPF_OBJ_GET_INFO_BY_FD_LAST_FIELD info.info + +static int bpf_obj_get_info_by_fd(const union bpf_attr *attr, + union bpf_attr __user *uattr) +{ + int ufd = attr->info.bpf_fd; + struct fd f; + int err; + + if (CHECK_ATTR(BPF_OBJ_GET_INFO_BY_FD)) + return -EINVAL; + + f = fdget(ufd); + if (!f.file) + return -EBADFD; + + if (f.file->f_op == &bpf_prog_fops) + err = bpf_prog_get_info_by_fd(f.file, f.file->private_data, attr, + uattr); + else if (f.file->f_op == &bpf_map_fops) + err = bpf_map_get_info_by_fd(f.file, f.file->private_data, attr, + uattr); + else if (f.file->f_op == &btf_fops) + err = bpf_btf_get_info_by_fd(f.file, f.file->private_data, attr, uattr); + else + err = -EINVAL; + + fdput(f); + return err; +} + +#define BPF_BTF_LOAD_LAST_FIELD btf_log_level + +static int bpf_btf_load(const union bpf_attr *attr) +{ + if (CHECK_ATTR(BPF_BTF_LOAD)) + return -EINVAL; + + if (!capable(CAP_SYS_ADMIN)) + return -EPERM; + + return btf_new_fd(attr); +} + +#define BPF_BTF_GET_FD_BY_ID_LAST_FIELD btf_id + +static int bpf_btf_get_fd_by_id(const union bpf_attr *attr) +{ + if (CHECK_ATTR(BPF_BTF_GET_FD_BY_ID)) + return -EINVAL; + + if (!capable(CAP_SYS_ADMIN)) + return -EPERM; + + return btf_get_fd_by_id(attr->btf_id); +} + +static int bpf_task_fd_query_copy(const union bpf_attr *attr, + union bpf_attr __user *uattr, + u32 prog_id, u32 fd_type, + const char *buf, u64 probe_offset, + u64 probe_addr) +{ + char __user *ubuf = u64_to_user_ptr(attr->task_fd_query.buf); + u32 len = buf ? strlen(buf) : 0, input_len; + int err = 0; + + if (put_user(len, &uattr->task_fd_query.buf_len)) + return -EFAULT; + input_len = attr->task_fd_query.buf_len; + if (input_len && ubuf) { + if (!len) { + /* nothing to copy, just make ubuf NULL terminated */ + char zero = '\0'; + + if (put_user(zero, ubuf)) + return -EFAULT; + } else if (input_len >= len + 1) { + /* ubuf can hold the string with NULL terminator */ + if (copy_to_user(ubuf, buf, len + 1)) + return -EFAULT; + } else { + /* ubuf cannot hold the string with NULL terminator, + * do a partial copy with NULL terminator. + */ + char zero = '\0'; + + err = -ENOSPC; + if (copy_to_user(ubuf, buf, input_len - 1)) + return -EFAULT; + if (put_user(zero, ubuf + input_len - 1)) + return -EFAULT; + } + } + + if (put_user(prog_id, &uattr->task_fd_query.prog_id) || + put_user(fd_type, &uattr->task_fd_query.fd_type) || + put_user(probe_offset, &uattr->task_fd_query.probe_offset) || + put_user(probe_addr, &uattr->task_fd_query.probe_addr)) + return -EFAULT; + + return err; +} + +#define BPF_TASK_FD_QUERY_LAST_FIELD task_fd_query.probe_addr + +static int bpf_task_fd_query(const union bpf_attr *attr, + union bpf_attr __user *uattr) +{ + pid_t pid = attr->task_fd_query.pid; + u32 fd = attr->task_fd_query.fd; + const struct perf_event *event; + struct files_struct *files; + struct task_struct *task; + struct file *file; + int err; + + if (CHECK_ATTR(BPF_TASK_FD_QUERY)) + return -EINVAL; + + if (!capable(CAP_SYS_ADMIN)) + return -EPERM; + + if (attr->task_fd_query.flags != 0) + return -EINVAL; + + task = get_pid_task(find_vpid(pid), PIDTYPE_PID); + if (!task) + return -ENOENT; + + files = get_files_struct(task); + put_task_struct(task); + if (!files) + return -ENOENT; + + err = 0; + spin_lock(&files->file_lock); + file = fcheck_files(files, fd); + if (!file) + err = -EBADF; + else + get_file(file); + spin_unlock(&files->file_lock); + put_files_struct(files); + + if (err) + goto out; + + if (file->f_op == &bpf_raw_tp_fops) { + struct bpf_raw_tracepoint *raw_tp = file->private_data; + struct bpf_raw_event_map *btp = raw_tp->btp; + + err = bpf_task_fd_query_copy(attr, uattr, + raw_tp->prog->aux->id, + BPF_FD_TYPE_RAW_TRACEPOINT, + btp->tp->name, 0, 0); + goto put_file; + } + + event = perf_get_event(file); + if (!IS_ERR(event)) { + u64 probe_offset, probe_addr; + u32 prog_id, fd_type; + const char *buf; + + err = bpf_get_perf_event_info(event, &prog_id, &fd_type, + &buf, &probe_offset, + &probe_addr); + if (!err) + err = bpf_task_fd_query_copy(attr, uattr, prog_id, + fd_type, buf, + probe_offset, + probe_addr); + goto put_file; + } + + err = -ENOTSUPP; +put_file: + fput(file); +out: + return err; +} + +SYSCALL_DEFINE3(bpf, int, cmd, union bpf_attr __user *, uattr, unsigned int, size) +{ + union bpf_attr attr; + int err; + + if (sysctl_unprivileged_bpf_disabled && !capable(CAP_SYS_ADMIN)) + return -EPERM; + + err = bpf_check_uarg_tail_zero(uattr, sizeof(attr), size); + if (err) + return err; + size = min_t(u32, size, sizeof(attr)); + + /* copy attributes from user space, may be less than sizeof(bpf_attr) */ + memset(&attr, 0, sizeof(attr)); + if (copy_from_user(&attr, uattr, size) != 0) + return -EFAULT; + + err = security_bpf(cmd, &attr, size); + if (err < 0) + return err; + + switch (cmd) { + case BPF_MAP_CREATE: + err = map_create(&attr); + break; + case BPF_MAP_LOOKUP_ELEM: + err = map_lookup_elem(&attr); + break; + case BPF_MAP_UPDATE_ELEM: + err = map_update_elem(&attr); + break; + case BPF_MAP_DELETE_ELEM: + err = map_delete_elem(&attr); + break; + case BPF_MAP_GET_NEXT_KEY: + err = map_get_next_key(&attr); + break; + case BPF_PROG_LOAD: + err = bpf_prog_load(&attr); + break; + case BPF_OBJ_PIN: + err = bpf_obj_pin(&attr); + break; + case BPF_OBJ_GET: + err = bpf_obj_get(&attr); + break; + case BPF_PROG_ATTACH: + err = bpf_prog_attach(&attr); + break; + case BPF_PROG_DETACH: + err = bpf_prog_detach(&attr); + break; + case BPF_PROG_QUERY: + err = bpf_prog_query(&attr, uattr); + break; + case BPF_PROG_TEST_RUN: + err = bpf_prog_test_run(&attr, uattr); + break; + case BPF_PROG_GET_NEXT_ID: + err = bpf_obj_get_next_id(&attr, uattr, + &prog_idr, &prog_idr_lock); + break; + case BPF_MAP_GET_NEXT_ID: + err = bpf_obj_get_next_id(&attr, uattr, + &map_idr, &map_idr_lock); + break; + case BPF_PROG_GET_FD_BY_ID: + err = bpf_prog_get_fd_by_id(&attr); + break; + case BPF_MAP_GET_FD_BY_ID: + err = bpf_map_get_fd_by_id(&attr); + break; + case BPF_OBJ_GET_INFO_BY_FD: + err = bpf_obj_get_info_by_fd(&attr, uattr); + break; + case BPF_RAW_TRACEPOINT_OPEN: + err = bpf_raw_tracepoint_open(&attr); + break; + case BPF_BTF_LOAD: + err = bpf_btf_load(&attr); + break; + case BPF_BTF_GET_FD_BY_ID: + err = bpf_btf_get_fd_by_id(&attr); + break; + case BPF_TASK_FD_QUERY: + err = bpf_task_fd_query(&attr, uattr); + break; + default: + err = -EINVAL; + break; + } + + return err; +} |