diff options
Diffstat (limited to 'tools/include/uapi/linux/bpf.h')
| -rw-r--r-- | tools/include/uapi/linux/bpf.h | 116 |
1 files changed, 98 insertions, 18 deletions
diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h index 59a217ca2dfd..793103b10eab 100644 --- a/tools/include/uapi/linux/bpf.h +++ b/tools/include/uapi/linux/bpf.h @@ -87,10 +87,29 @@ struct bpf_cgroup_storage_key { __u32 attach_type; /* program attach type (enum bpf_attach_type) */ }; +enum bpf_cgroup_iter_order { + BPF_CGROUP_ITER_ORDER_UNSPEC = 0, + BPF_CGROUP_ITER_SELF_ONLY, /* process only a single object. */ + BPF_CGROUP_ITER_DESCENDANTS_PRE, /* walk descendants in pre-order. */ + BPF_CGROUP_ITER_DESCENDANTS_POST, /* walk descendants in post-order. */ + BPF_CGROUP_ITER_ANCESTORS_UP, /* walk ancestors upward. */ +}; + union bpf_iter_link_info { struct { __u32 map_fd; } map; + struct { + enum bpf_cgroup_iter_order order; + + /* At most one of cgroup_fd and cgroup_id can be non-zero. If + * both are zero, the walk starts from the default cgroup v2 + * root. For walking v1 hierarchy, one should always explicitly + * specify cgroup_fd. + */ + __u32 cgroup_fd; + __u64 cgroup_id; + } cgroup; }; /* BPF syscall commands, see bpf(2) man-page for more details. */ @@ -2573,10 +2592,12 @@ union bpf_attr { * There are two supported modes at this time: * * * **BPF_ADJ_ROOM_MAC**: Adjust room at the mac layer - * (room space is added or removed below the layer 2 header). + * (room space is added or removed between the layer 2 and + * layer 3 headers). * * * **BPF_ADJ_ROOM_NET**: Adjust room at the network layer - * (room space is added or removed below the layer 3 header). + * (room space is added or removed between the layer 3 and + * layer 4 headers). * * The following flags are supported at this time: * @@ -3008,8 +3029,18 @@ union bpf_attr { * **BPF_F_USER_STACK** * Collect a user space stack instead of a kernel stack. * **BPF_F_USER_BUILD_ID** - * Collect buildid+offset instead of ips for user stack, - * only valid if **BPF_F_USER_STACK** is also specified. + * Collect (build_id, file_offset) instead of ips for user + * stack, only valid if **BPF_F_USER_STACK** is also + * specified. + * + * *file_offset* is an offset relative to the beginning + * of the executable or shared object file backing the vma + * which the *ip* falls in. It is *not* an offset relative + * to that object's base address. Accordingly, it must be + * adjusted by adding (sh_addr - sh_offset), where + * sh_{addr,offset} correspond to the executable section + * containing *file_offset* in the object, for comparisons + * to symbols' st_value to be valid. * * **bpf_get_stack**\ () can collect up to * **PERF_MAX_STACK_DEPTH** both kernel and user frames, subject @@ -4425,7 +4456,7 @@ union bpf_attr { * * **-EEXIST** if the option already exists. * - * **-EFAULT** on failrue to parse the existing header options. + * **-EFAULT** on failure to parse the existing header options. * * **-EPERM** if the helper cannot be used under the current * *skops*\ **->op**. @@ -4634,7 +4665,7 @@ union bpf_attr { * a *map* with *task* as the **key**. From this * perspective, the usage is not much different from * **bpf_map_lookup_elem**\ (*map*, **&**\ *task*) except this - * helper enforces the key must be an task_struct and the map must also + * helper enforces the key must be a task_struct and the map must also * be a **BPF_MAP_TYPE_TASK_STORAGE**. * * Underneath, the value is stored locally at *task* instead of @@ -4692,7 +4723,7 @@ union bpf_attr { * * long bpf_ima_inode_hash(struct inode *inode, void *dst, u32 size) * Description - * Returns the stored IMA hash of the *inode* (if it's avaialable). + * Returns the stored IMA hash of the *inode* (if it's available). * If the hash is larger than *size*, then only *size* * bytes will be copied to *dst* * Return @@ -4716,12 +4747,12 @@ union bpf_attr { * * The argument *len_diff* can be used for querying with a planned * size change. This allows to check MTU prior to changing packet - * ctx. Providing an *len_diff* adjustment that is larger than the + * ctx. Providing a *len_diff* adjustment that is larger than the * actual packet size (resulting in negative packet size) will in - * principle not exceed the MTU, why it is not considered a - * failure. Other BPF-helpers are needed for performing the - * planned size change, why the responsability for catch a negative - * packet size belong in those helpers. + * principle not exceed the MTU, which is why it is not considered + * a failure. Other BPF helpers are needed for performing the + * planned size change; therefore the responsibility for catching + * a negative packet size belongs in those helpers. * * Specifying *ifindex* zero means the MTU check is performed * against the current net device. This is practical if this isn't @@ -5073,17 +5104,29 @@ union bpf_attr { * * int bpf_get_retval(void) * Description - * Get the syscall's return value that will be returned to userspace. + * Get the BPF program's return value that will be returned to the upper layers. * - * This helper is currently supported by cgroup programs only. + * This helper is currently supported by cgroup programs and only by the hooks + * where BPF program's return value is returned to the userspace via errno. * Return - * The syscall's return value. + * The BPF program's return value. * * int bpf_set_retval(int retval) * Description - * Set the syscall's return value that will be returned to userspace. + * Set the BPF program's return value that will be returned to the upper layers. + * + * This helper is currently supported by cgroup programs and only by the hooks + * where BPF program's return value is returned to the userspace via errno. + * + * Note that there is the following corner case where the program exports an error + * via bpf_set_retval but signals success via 'return 1': + * + * bpf_set_retval(-EPERM); + * return 1; + * + * In this case, the BPF program's return value will use helper's -EPERM. This + * still holds true for cgroup/bind{4,6} which supports extra 'return 3' success case. * - * This helper is currently supported by cgroup programs only. * Return * 0 on success, or a negative error in case of failure. * @@ -5331,6 +5374,18 @@ union bpf_attr { * **-EACCES** if the SYN cookie is not valid. * * **-EPROTONOSUPPORT** if CONFIG_IPV6 is not builtin. + * + * u64 bpf_ktime_get_tai_ns(void) + * Description + * A nonsettable system-wide clock derived from wall-clock time but + * ignoring leap seconds. This clock does not experience + * discontinuities and backwards jumps caused by NTP inserting leap + * seconds as CLOCK_REALTIME does. + * + * See: **clock_gettime**\ (**CLOCK_TAI**) + * Return + * Current *ktime*. + * */ #define __BPF_FUNC_MAPPER(FN) \ FN(unspec), \ @@ -5541,6 +5596,7 @@ union bpf_attr { FN(tcp_raw_gen_syncookie_ipv6), \ FN(tcp_raw_check_syncookie_ipv4), \ FN(tcp_raw_check_syncookie_ipv6), \ + FN(ktime_get_tai_ns), \ /* */ /* integer value in 'imm' field of BPF_CALL instruction selects which helper @@ -5603,6 +5659,11 @@ enum { BPF_F_SEQ_NUMBER = (1ULL << 3), }; +/* BPF_FUNC_skb_get_tunnel_key flags. */ +enum { + BPF_F_TUNINFO_FLAGS = (1ULL << 4), +}; + /* BPF_FUNC_perf_event_output, BPF_FUNC_perf_event_read and * BPF_FUNC_perf_event_read_value flags. */ @@ -5792,7 +5853,10 @@ struct bpf_tunnel_key { }; __u8 tunnel_tos; __u8 tunnel_ttl; - __u16 tunnel_ext; /* Padding, future use. */ + union { + __u16 tunnel_ext; /* compat */ + __be16 tunnel_flags; + }; __u32 tunnel_label; union { __u32 local_ipv4; @@ -5836,6 +5900,11 @@ enum bpf_ret_code { * represented by BPF_REDIRECT above). */ BPF_LWT_REROUTE = 128, + /* BPF_FLOW_DISSECTOR_CONTINUE: used by BPF_PROG_TYPE_FLOW_DISSECTOR + * to indicate that no custom dissection was performed, and + * fallback to standard dissector is requested. + */ + BPF_FLOW_DISSECTOR_CONTINUE = 129, }; struct bpf_sock { @@ -6134,11 +6203,22 @@ struct bpf_link_info { struct { __aligned_u64 target_name; /* in/out: target_name buffer ptr */ __u32 target_name_len; /* in/out: target_name buffer len */ + + /* If the iter specific field is 32 bits, it can be put + * in the first or second union. Otherwise it should be + * put in the second union. + */ union { struct { __u32 map_id; } map; }; + union { + struct { + __u64 cgroup_id; + __u32 order; + } cgroup; + }; } iter; struct { __u32 netns_ino; |