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-rw-r--r--tools/include/uapi/linux/bpf.h271
1 files changed, 172 insertions, 99 deletions
diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h
index 974a71342aea..da9bf35a26f8 100644
--- a/tools/include/uapi/linux/bpf.h
+++ b/tools/include/uapi/linux/bpf.h
@@ -653,7 +653,7 @@ union bpf_attr {
* Map value associated to *key*, or **NULL** if no entry was
* found.
*
- * int bpf_map_update_elem(struct bpf_map *map, const void *key, const void *value, u64 flags)
+ * long bpf_map_update_elem(struct bpf_map *map, const void *key, const void *value, u64 flags)
* Description
* Add or update the value of the entry associated to *key* in
* *map* with *value*. *flags* is one of:
@@ -671,13 +671,13 @@ union bpf_attr {
* Return
* 0 on success, or a negative error in case of failure.
*
- * int bpf_map_delete_elem(struct bpf_map *map, const void *key)
+ * long bpf_map_delete_elem(struct bpf_map *map, const void *key)
* Description
* Delete entry with *key* from *map*.
* Return
* 0 on success, or a negative error in case of failure.
*
- * int bpf_probe_read(void *dst, u32 size, const void *unsafe_ptr)
+ * long bpf_probe_read(void *dst, u32 size, const void *unsafe_ptr)
* Description
* For tracing programs, safely attempt to read *size* bytes from
* kernel space address *unsafe_ptr* and store the data in *dst*.
@@ -695,7 +695,7 @@ union bpf_attr {
* Return
* Current *ktime*.
*
- * int bpf_trace_printk(const char *fmt, u32 fmt_size, ...)
+ * long bpf_trace_printk(const char *fmt, u32 fmt_size, ...)
* Description
* This helper is a "printk()-like" facility for debugging. It
* prints a message defined by format *fmt* (of size *fmt_size*)
@@ -775,7 +775,7 @@ union bpf_attr {
* Return
* The SMP id of the processor running the program.
*
- * int bpf_skb_store_bytes(struct sk_buff *skb, u32 offset, const void *from, u32 len, u64 flags)
+ * long bpf_skb_store_bytes(struct sk_buff *skb, u32 offset, const void *from, u32 len, u64 flags)
* Description
* Store *len* bytes from address *from* into the packet
* associated to *skb*, at *offset*. *flags* are a combination of
@@ -792,7 +792,7 @@ union bpf_attr {
* Return
* 0 on success, or a negative error in case of failure.
*
- * int bpf_l3_csum_replace(struct sk_buff *skb, u32 offset, u64 from, u64 to, u64 size)
+ * long bpf_l3_csum_replace(struct sk_buff *skb, u32 offset, u64 from, u64 to, u64 size)
* Description
* Recompute the layer 3 (e.g. IP) checksum for the packet
* associated to *skb*. Computation is incremental, so the helper
@@ -817,7 +817,7 @@ union bpf_attr {
* Return
* 0 on success, or a negative error in case of failure.
*
- * int bpf_l4_csum_replace(struct sk_buff *skb, u32 offset, u64 from, u64 to, u64 flags)
+ * long bpf_l4_csum_replace(struct sk_buff *skb, u32 offset, u64 from, u64 to, u64 flags)
* Description
* Recompute the layer 4 (e.g. TCP, UDP or ICMP) checksum for the
* packet associated to *skb*. Computation is incremental, so the
@@ -849,7 +849,7 @@ union bpf_attr {
* Return
* 0 on success, or a negative error in case of failure.
*
- * int bpf_tail_call(void *ctx, struct bpf_map *prog_array_map, u32 index)
+ * long bpf_tail_call(void *ctx, struct bpf_map *prog_array_map, u32 index)
* Description
* This special helper is used to trigger a "tail call", or in
* other words, to jump into another eBPF program. The same stack
@@ -880,7 +880,7 @@ union bpf_attr {
* Return
* 0 on success, or a negative error in case of failure.
*
- * int bpf_clone_redirect(struct sk_buff *skb, u32 ifindex, u64 flags)
+ * long bpf_clone_redirect(struct sk_buff *skb, u32 ifindex, u64 flags)
* Description
* Clone and redirect the packet associated to *skb* to another
* net device of index *ifindex*. Both ingress and egress
@@ -916,7 +916,7 @@ union bpf_attr {
* A 64-bit integer containing the current GID and UID, and
* created as such: *current_gid* **<< 32 \|** *current_uid*.
*
- * int bpf_get_current_comm(void *buf, u32 size_of_buf)
+ * long bpf_get_current_comm(void *buf, u32 size_of_buf)
* Description
* Copy the **comm** attribute of the current task into *buf* of
* *size_of_buf*. The **comm** attribute contains the name of
@@ -953,7 +953,7 @@ union bpf_attr {
* Return
* The classid, or 0 for the default unconfigured classid.
*
- * int bpf_skb_vlan_push(struct sk_buff *skb, __be16 vlan_proto, u16 vlan_tci)
+ * long bpf_skb_vlan_push(struct sk_buff *skb, __be16 vlan_proto, u16 vlan_tci)
* Description
* Push a *vlan_tci* (VLAN tag control information) of protocol
* *vlan_proto* to the packet associated to *skb*, then update
@@ -969,7 +969,7 @@ union bpf_attr {
* Return
* 0 on success, or a negative error in case of failure.
*
- * int bpf_skb_vlan_pop(struct sk_buff *skb)
+ * long bpf_skb_vlan_pop(struct sk_buff *skb)
* Description
* Pop a VLAN header from the packet associated to *skb*.
*
@@ -981,7 +981,7 @@ union bpf_attr {
* Return
* 0 on success, or a negative error in case of failure.
*
- * int bpf_skb_get_tunnel_key(struct sk_buff *skb, struct bpf_tunnel_key *key, u32 size, u64 flags)
+ * long bpf_skb_get_tunnel_key(struct sk_buff *skb, struct bpf_tunnel_key *key, u32 size, u64 flags)
* Description
* Get tunnel metadata. This helper takes a pointer *key* to an
* empty **struct bpf_tunnel_key** of **size**, that will be
@@ -1032,7 +1032,7 @@ union bpf_attr {
* Return
* 0 on success, or a negative error in case of failure.
*
- * int bpf_skb_set_tunnel_key(struct sk_buff *skb, struct bpf_tunnel_key *key, u32 size, u64 flags)
+ * long bpf_skb_set_tunnel_key(struct sk_buff *skb, struct bpf_tunnel_key *key, u32 size, u64 flags)
* Description
* Populate tunnel metadata for packet associated to *skb.* The
* tunnel metadata is set to the contents of *key*, of *size*. The
@@ -1098,7 +1098,7 @@ union bpf_attr {
* The value of the perf event counter read from the map, or a
* negative error code in case of failure.
*
- * int bpf_redirect(u32 ifindex, u64 flags)
+ * long bpf_redirect(u32 ifindex, u64 flags)
* Description
* Redirect the packet to another net device of index *ifindex*.
* This helper is somewhat similar to **bpf_clone_redirect**\
@@ -1145,7 +1145,7 @@ union bpf_attr {
* The realm of the route for the packet associated to *skb*, or 0
* if none was found.
*
- * int bpf_perf_event_output(void *ctx, struct bpf_map *map, u64 flags, void *data, u64 size)
+ * long bpf_perf_event_output(void *ctx, struct bpf_map *map, u64 flags, void *data, u64 size)
* Description
* Write raw *data* blob into a special BPF perf event held by
* *map* of type **BPF_MAP_TYPE_PERF_EVENT_ARRAY**. This perf
@@ -1190,7 +1190,7 @@ union bpf_attr {
* Return
* 0 on success, or a negative error in case of failure.
*
- * int bpf_skb_load_bytes(const void *skb, u32 offset, void *to, u32 len)
+ * long bpf_skb_load_bytes(const void *skb, u32 offset, void *to, u32 len)
* Description
* This helper was provided as an easy way to load data from a
* packet. It can be used to load *len* bytes from *offset* from
@@ -1207,7 +1207,7 @@ union bpf_attr {
* Return
* 0 on success, or a negative error in case of failure.
*
- * int bpf_get_stackid(void *ctx, struct bpf_map *map, u64 flags)
+ * long bpf_get_stackid(void *ctx, struct bpf_map *map, u64 flags)
* Description
* Walk a user or a kernel stack and return its id. To achieve
* this, the helper needs *ctx*, which is a pointer to the context
@@ -1276,7 +1276,7 @@ union bpf_attr {
* The checksum result, or a negative error code in case of
* failure.
*
- * int bpf_skb_get_tunnel_opt(struct sk_buff *skb, void *opt, u32 size)
+ * long bpf_skb_get_tunnel_opt(struct sk_buff *skb, void *opt, u32 size)
* Description
* Retrieve tunnel options metadata for the packet associated to
* *skb*, and store the raw tunnel option data to the buffer *opt*
@@ -1294,7 +1294,7 @@ union bpf_attr {
* Return
* The size of the option data retrieved.
*
- * int bpf_skb_set_tunnel_opt(struct sk_buff *skb, void *opt, u32 size)
+ * long bpf_skb_set_tunnel_opt(struct sk_buff *skb, void *opt, u32 size)
* Description
* Set tunnel options metadata for the packet associated to *skb*
* to the option data contained in the raw buffer *opt* of *size*.
@@ -1304,7 +1304,7 @@ union bpf_attr {
* Return
* 0 on success, or a negative error in case of failure.
*
- * int bpf_skb_change_proto(struct sk_buff *skb, __be16 proto, u64 flags)
+ * long bpf_skb_change_proto(struct sk_buff *skb, __be16 proto, u64 flags)
* Description
* Change the protocol of the *skb* to *proto*. Currently
* supported are transition from IPv4 to IPv6, and from IPv6 to
@@ -1331,7 +1331,7 @@ union bpf_attr {
* Return
* 0 on success, or a negative error in case of failure.
*
- * int bpf_skb_change_type(struct sk_buff *skb, u32 type)
+ * long bpf_skb_change_type(struct sk_buff *skb, u32 type)
* Description
* Change the packet type for the packet associated to *skb*. This
* comes down to setting *skb*\ **->pkt_type** to *type*, except
@@ -1358,7 +1358,7 @@ union bpf_attr {
* Return
* 0 on success, or a negative error in case of failure.
*
- * int bpf_skb_under_cgroup(struct sk_buff *skb, struct bpf_map *map, u32 index)
+ * long bpf_skb_under_cgroup(struct sk_buff *skb, struct bpf_map *map, u32 index)
* Description
* Check whether *skb* is a descendant of the cgroup2 held by
* *map* of type **BPF_MAP_TYPE_CGROUP_ARRAY**, at *index*.
@@ -1389,7 +1389,7 @@ union bpf_attr {
* Return
* A pointer to the current task struct.
*
- * int bpf_probe_write_user(void *dst, const void *src, u32 len)
+ * long bpf_probe_write_user(void *dst, const void *src, u32 len)
* Description
* Attempt in a safe way to write *len* bytes from the buffer
* *src* to *dst* in memory. It only works for threads that are in
@@ -1408,7 +1408,7 @@ union bpf_attr {
* Return
* 0 on success, or a negative error in case of failure.
*
- * int bpf_current_task_under_cgroup(struct bpf_map *map, u32 index)
+ * long bpf_current_task_under_cgroup(struct bpf_map *map, u32 index)
* Description
* Check whether the probe is being run is the context of a given
* subset of the cgroup2 hierarchy. The cgroup2 to test is held by
@@ -1420,7 +1420,7 @@ union bpf_attr {
* * 1, if the *skb* task does not belong to the cgroup2.
* * A negative error code, if an error occurred.
*
- * int bpf_skb_change_tail(struct sk_buff *skb, u32 len, u64 flags)
+ * long bpf_skb_change_tail(struct sk_buff *skb, u32 len, u64 flags)
* Description
* Resize (trim or grow) the packet associated to *skb* to the
* new *len*. The *flags* are reserved for future usage, and must
@@ -1444,7 +1444,7 @@ union bpf_attr {
* Return
* 0 on success, or a negative error in case of failure.
*
- * int bpf_skb_pull_data(struct sk_buff *skb, u32 len)
+ * long bpf_skb_pull_data(struct sk_buff *skb, u32 len)
* Description
* Pull in non-linear data in case the *skb* is non-linear and not
* all of *len* are part of the linear section. Make *len* bytes
@@ -1500,7 +1500,7 @@ union bpf_attr {
* recalculation the next time the kernel tries to access this
* hash or when the **bpf_get_hash_recalc**\ () helper is called.
*
- * int bpf_get_numa_node_id(void)
+ * long bpf_get_numa_node_id(void)
* Description
* Return the id of the current NUMA node. The primary use case
* for this helper is the selection of sockets for the local NUMA
@@ -1511,7 +1511,7 @@ union bpf_attr {
* Return
* The id of current NUMA node.
*
- * int bpf_skb_change_head(struct sk_buff *skb, u32 len, u64 flags)
+ * long bpf_skb_change_head(struct sk_buff *skb, u32 len, u64 flags)
* Description
* Grows headroom of packet associated to *skb* and adjusts the
* offset of the MAC header accordingly, adding *len* bytes of
@@ -1532,7 +1532,7 @@ union bpf_attr {
* Return
* 0 on success, or a negative error in case of failure.
*
- * int bpf_xdp_adjust_head(struct xdp_buff *xdp_md, int delta)
+ * long bpf_xdp_adjust_head(struct xdp_buff *xdp_md, int delta)
* Description
* Adjust (move) *xdp_md*\ **->data** by *delta* bytes. Note that
* it is possible to use a negative value for *delta*. This helper
@@ -1547,7 +1547,7 @@ union bpf_attr {
* Return
* 0 on success, or a negative error in case of failure.
*
- * int bpf_probe_read_str(void *dst, u32 size, const void *unsafe_ptr)
+ * long bpf_probe_read_str(void *dst, u32 size, const void *unsafe_ptr)
* Description
* Copy a NUL terminated string from an unsafe kernel address
* *unsafe_ptr* to *dst*. See **bpf_probe_read_kernel_str**\ () for
@@ -1595,14 +1595,14 @@ union bpf_attr {
* is returned (note that **overflowuid** might also be the actual
* UID value for the socket).
*
- * u32 bpf_set_hash(struct sk_buff *skb, u32 hash)
+ * long bpf_set_hash(struct sk_buff *skb, u32 hash)
* Description
* Set the full hash for *skb* (set the field *skb*\ **->hash**)
* to value *hash*.
* Return
* 0
*
- * int bpf_setsockopt(void *bpf_socket, int level, int optname, void *optval, int optlen)
+ * long bpf_setsockopt(void *bpf_socket, int level, int optname, void *optval, int optlen)
* Description
* Emulate a call to **setsockopt()** on the socket associated to
* *bpf_socket*, which must be a full socket. The *level* at
@@ -1621,16 +1621,19 @@ union bpf_attr {
*
* * **SOL_SOCKET**, which supports the following *optname*\ s:
* **SO_RCVBUF**, **SO_SNDBUF**, **SO_MAX_PACING_RATE**,
- * **SO_PRIORITY**, **SO_RCVLOWAT**, **SO_MARK**.
+ * **SO_PRIORITY**, **SO_RCVLOWAT**, **SO_MARK**,
+ * **SO_BINDTODEVICE**, **SO_KEEPALIVE**.
* * **IPPROTO_TCP**, which supports the following *optname*\ s:
* **TCP_CONGESTION**, **TCP_BPF_IW**,
- * **TCP_BPF_SNDCWND_CLAMP**.
+ * **TCP_BPF_SNDCWND_CLAMP**, **TCP_SAVE_SYN**,
+ * **TCP_KEEPIDLE**, **TCP_KEEPINTVL**, **TCP_KEEPCNT**,
+ * **TCP_SYNCNT**, **TCP_USER_TIMEOUT**.
* * **IPPROTO_IP**, which supports *optname* **IP_TOS**.
* * **IPPROTO_IPV6**, which supports *optname* **IPV6_TCLASS**.
* Return
* 0 on success, or a negative error in case of failure.
*
- * int bpf_skb_adjust_room(struct sk_buff *skb, s32 len_diff, u32 mode, u64 flags)
+ * long bpf_skb_adjust_room(struct sk_buff *skb, s32 len_diff, u32 mode, u64 flags)
* Description
* Grow or shrink the room for data in the packet associated to
* *skb* by *len_diff*, and according to the selected *mode*.
@@ -1676,7 +1679,7 @@ union bpf_attr {
* Return
* 0 on success, or a negative error in case of failure.
*
- * int bpf_redirect_map(struct bpf_map *map, u32 key, u64 flags)
+ * long bpf_redirect_map(struct bpf_map *map, u32 key, u64 flags)
* Description
* Redirect the packet to the endpoint referenced by *map* at
* index *key*. Depending on its type, this *map* can contain
@@ -1697,7 +1700,7 @@ union bpf_attr {
* **XDP_REDIRECT** on success, or the value of the two lower bits
* of the *flags* argument on error.
*
- * int bpf_sk_redirect_map(struct sk_buff *skb, struct bpf_map *map, u32 key, u64 flags)
+ * long bpf_sk_redirect_map(struct sk_buff *skb, struct bpf_map *map, u32 key, u64 flags)
* Description
* Redirect the packet to the socket referenced by *map* (of type
* **BPF_MAP_TYPE_SOCKMAP**) at index *key*. Both ingress and
@@ -1708,7 +1711,7 @@ union bpf_attr {
* Return
* **SK_PASS** on success, or **SK_DROP** on error.
*
- * int bpf_sock_map_update(struct bpf_sock_ops *skops, struct bpf_map *map, void *key, u64 flags)
+ * long bpf_sock_map_update(struct bpf_sock_ops *skops, struct bpf_map *map, void *key, u64 flags)
* Description
* Add an entry to, or update a *map* referencing sockets. The
* *skops* is used as a new value for the entry associated to
@@ -1727,7 +1730,7 @@ union bpf_attr {
* Return
* 0 on success, or a negative error in case of failure.
*
- * int bpf_xdp_adjust_meta(struct xdp_buff *xdp_md, int delta)
+ * long bpf_xdp_adjust_meta(struct xdp_buff *xdp_md, int delta)
* Description
* Adjust the address pointed by *xdp_md*\ **->data_meta** by
* *delta* (which can be positive or negative). Note that this
@@ -1756,7 +1759,7 @@ union bpf_attr {
* Return
* 0 on success, or a negative error in case of failure.
*
- * int bpf_perf_event_read_value(struct bpf_map *map, u64 flags, struct bpf_perf_event_value *buf, u32 buf_size)
+ * long bpf_perf_event_read_value(struct bpf_map *map, u64 flags, struct bpf_perf_event_value *buf, u32 buf_size)
* Description
* Read the value of a perf event counter, and store it into *buf*
* of size *buf_size*. This helper relies on a *map* of type
@@ -1806,7 +1809,7 @@ union bpf_attr {
* Return
* 0 on success, or a negative error in case of failure.
*
- * int bpf_perf_prog_read_value(struct bpf_perf_event_data *ctx, struct bpf_perf_event_value *buf, u32 buf_size)
+ * long bpf_perf_prog_read_value(struct bpf_perf_event_data *ctx, struct bpf_perf_event_value *buf, u32 buf_size)
* Description
* For en eBPF program attached to a perf event, retrieve the
* value of the event counter associated to *ctx* and store it in
@@ -1817,7 +1820,7 @@ union bpf_attr {
* Return
* 0 on success, or a negative error in case of failure.
*
- * int bpf_getsockopt(void *bpf_socket, int level, int optname, void *optval, int optlen)
+ * long bpf_getsockopt(void *bpf_socket, int level, int optname, void *optval, int optlen)
* Description
* Emulate a call to **getsockopt()** on the socket associated to
* *bpf_socket*, which must be a full socket. The *level* at
@@ -1842,7 +1845,7 @@ union bpf_attr {
* Return
* 0 on success, or a negative error in case of failure.
*
- * int bpf_override_return(struct pt_regs *regs, u64 rc)
+ * long bpf_override_return(struct pt_regs *regs, u64 rc)
* Description
* Used for error injection, this helper uses kprobes to override
* the return value of the probed function, and to set it to *rc*.
@@ -1867,7 +1870,7 @@ union bpf_attr {
* Return
* 0
*
- * int bpf_sock_ops_cb_flags_set(struct bpf_sock_ops *bpf_sock, int argval)
+ * long bpf_sock_ops_cb_flags_set(struct bpf_sock_ops *bpf_sock, int argval)
* Description
* Attempt to set the value of the **bpf_sock_ops_cb_flags** field
* for the full TCP socket associated to *bpf_sock_ops* to
@@ -1911,7 +1914,7 @@ union bpf_attr {
* be set is returned (which comes down to 0 if all bits were set
* as required).
*
- * int bpf_msg_redirect_map(struct sk_msg_buff *msg, struct bpf_map *map, u32 key, u64 flags)
+ * long bpf_msg_redirect_map(struct sk_msg_buff *msg, struct bpf_map *map, u32 key, u64 flags)
* Description
* This helper is used in programs implementing policies at the
* socket level. If the message *msg* is allowed to pass (i.e. if
@@ -1925,7 +1928,7 @@ union bpf_attr {
* Return
* **SK_PASS** on success, or **SK_DROP** on error.
*
- * int bpf_msg_apply_bytes(struct sk_msg_buff *msg, u32 bytes)
+ * long bpf_msg_apply_bytes(struct sk_msg_buff *msg, u32 bytes)
* Description
* For socket policies, apply the verdict of the eBPF program to
* the next *bytes* (number of bytes) of message *msg*.
@@ -1959,7 +1962,7 @@ union bpf_attr {
* Return
* 0
*
- * int bpf_msg_cork_bytes(struct sk_msg_buff *msg, u32 bytes)
+ * long bpf_msg_cork_bytes(struct sk_msg_buff *msg, u32 bytes)
* Description
* For socket policies, prevent the execution of the verdict eBPF
* program for message *msg* until *bytes* (byte number) have been
@@ -1977,7 +1980,7 @@ union bpf_attr {
* Return
* 0
*
- * int bpf_msg_pull_data(struct sk_msg_buff *msg, u32 start, u32 end, u64 flags)
+ * long bpf_msg_pull_data(struct sk_msg_buff *msg, u32 start, u32 end, u64 flags)
* Description
* For socket policies, pull in non-linear data from user space
* for *msg* and set pointers *msg*\ **->data** and *msg*\
@@ -2008,7 +2011,7 @@ union bpf_attr {
* Return
* 0 on success, or a negative error in case of failure.
*
- * int bpf_bind(struct bpf_sock_addr *ctx, struct sockaddr *addr, int addr_len)
+ * long bpf_bind(struct bpf_sock_addr *ctx, struct sockaddr *addr, int addr_len)
* Description
* Bind the socket associated to *ctx* to the address pointed by
* *addr*, of length *addr_len*. This allows for making outgoing
@@ -2026,7 +2029,7 @@ union bpf_attr {
* Return
* 0 on success, or a negative error in case of failure.
*
- * int bpf_xdp_adjust_tail(struct xdp_buff *xdp_md, int delta)
+ * long bpf_xdp_adjust_tail(struct xdp_buff *xdp_md, int delta)
* Description
* Adjust (move) *xdp_md*\ **->data_end** by *delta* bytes. It is
* possible to both shrink and grow the packet tail.
@@ -2040,7 +2043,7 @@ union bpf_attr {
* Return
* 0 on success, or a negative error in case of failure.
*
- * int bpf_skb_get_xfrm_state(struct sk_buff *skb, u32 index, struct bpf_xfrm_state *xfrm_state, u32 size, u64 flags)
+ * long bpf_skb_get_xfrm_state(struct sk_buff *skb, u32 index, struct bpf_xfrm_state *xfrm_state, u32 size, u64 flags)
* Description
* Retrieve the XFRM state (IP transform framework, see also
* **ip-xfrm(8)**) at *index* in XFRM "security path" for *skb*.
@@ -2056,7 +2059,7 @@ union bpf_attr {
* Return
* 0 on success, or a negative error in case of failure.
*
- * int bpf_get_stack(void *ctx, void *buf, u32 size, u64 flags)
+ * long bpf_get_stack(void *ctx, void *buf, u32 size, u64 flags)
* Description
* Return a user or a kernel stack in bpf program provided buffer.
* To achieve this, the helper needs *ctx*, which is a pointer
@@ -2089,7 +2092,7 @@ union bpf_attr {
* A non-negative value equal to or less than *size* on success,
* or a negative error in case of failure.
*
- * int bpf_skb_load_bytes_relative(const void *skb, u32 offset, void *to, u32 len, u32 start_header)
+ * long bpf_skb_load_bytes_relative(const void *skb, u32 offset, void *to, u32 len, u32 start_header)
* Description
* This helper is similar to **bpf_skb_load_bytes**\ () in that
* it provides an easy way to load *len* bytes from *offset*
@@ -2111,7 +2114,7 @@ union bpf_attr {
* Return
* 0 on success, or a negative error in case of failure.
*
- * int bpf_fib_lookup(void *ctx, struct bpf_fib_lookup *params, int plen, u32 flags)
+ * long bpf_fib_lookup(void *ctx, struct bpf_fib_lookup *params, int plen, u32 flags)
* Description
* Do FIB lookup in kernel tables using parameters in *params*.
* If lookup is successful and result shows packet is to be
@@ -2142,7 +2145,7 @@ union bpf_attr {
* * > 0 one of **BPF_FIB_LKUP_RET_** codes explaining why the
* packet is not forwarded or needs assist from full stack
*
- * int bpf_sock_hash_update(struct bpf_sock_ops *skops, struct bpf_map *map, void *key, u64 flags)
+ * long bpf_sock_hash_update(struct bpf_sock_ops *skops, struct bpf_map *map, void *key, u64 flags)
* Description
* Add an entry to, or update a sockhash *map* referencing sockets.
* The *skops* is used as a new value for the entry associated to
@@ -2161,7 +2164,7 @@ union bpf_attr {
* Return
* 0 on success, or a negative error in case of failure.
*
- * int bpf_msg_redirect_hash(struct sk_msg_buff *msg, struct bpf_map *map, void *key, u64 flags)
+ * long bpf_msg_redirect_hash(struct sk_msg_buff *msg, struct bpf_map *map, void *key, u64 flags)
* Description
* This helper is used in programs implementing policies at the
* socket level. If the message *msg* is allowed to pass (i.e. if
@@ -2175,7 +2178,7 @@ union bpf_attr {
* Return
* **SK_PASS** on success, or **SK_DROP** on error.
*
- * int bpf_sk_redirect_hash(struct sk_buff *skb, struct bpf_map *map, void *key, u64 flags)
+ * long bpf_sk_redirect_hash(struct sk_buff *skb, struct bpf_map *map, void *key, u64 flags)
* Description
* This helper is used in programs implementing policies at the
* skb socket level. If the sk_buff *skb* is allowed to pass (i.e.
@@ -2189,7 +2192,7 @@ union bpf_attr {
* Return
* **SK_PASS** on success, or **SK_DROP** on error.
*
- * int bpf_lwt_push_encap(struct sk_buff *skb, u32 type, void *hdr, u32 len)
+ * long bpf_lwt_push_encap(struct sk_buff *skb, u32 type, void *hdr, u32 len)
* Description
* Encapsulate the packet associated to *skb* within a Layer 3
* protocol header. This header is provided in the buffer at
@@ -2226,7 +2229,7 @@ union bpf_attr {
* Return
* 0 on success, or a negative error in case of failure.
*
- * int bpf_lwt_seg6_store_bytes(struct sk_buff *skb, u32 offset, const void *from, u32 len)
+ * long bpf_lwt_seg6_store_bytes(struct sk_buff *skb, u32 offset, const void *from, u32 len)
* Description
* Store *len* bytes from address *from* into the packet
* associated to *skb*, at *offset*. Only the flags, tag and TLVs
@@ -2241,7 +2244,7 @@ union bpf_attr {
* Return
* 0 on success, or a negative error in case of failure.
*
- * int bpf_lwt_seg6_adjust_srh(struct sk_buff *skb, u32 offset, s32 delta)
+ * long bpf_lwt_seg6_adjust_srh(struct sk_buff *skb, u32 offset, s32 delta)
* Description
* Adjust the size allocated to TLVs in the outermost IPv6
* Segment Routing Header contained in the packet associated to
@@ -2257,7 +2260,7 @@ union bpf_attr {
* Return
* 0 on success, or a negative error in case of failure.
*
- * int bpf_lwt_seg6_action(struct sk_buff *skb, u32 action, void *param, u32 param_len)
+ * long bpf_lwt_seg6_action(struct sk_buff *skb, u32 action, void *param, u32 param_len)
* Description
* Apply an IPv6 Segment Routing action of type *action* to the
* packet associated to *skb*. Each action takes a parameter
@@ -2286,7 +2289,7 @@ union bpf_attr {
* Return
* 0 on success, or a negative error in case of failure.
*
- * int bpf_rc_repeat(void *ctx)
+ * long bpf_rc_repeat(void *ctx)
* Description
* This helper is used in programs implementing IR decoding, to
* report a successfully decoded repeat key message. This delays
@@ -2305,7 +2308,7 @@ union bpf_attr {
* Return
* 0
*
- * int bpf_rc_keydown(void *ctx, u32 protocol, u64 scancode, u32 toggle)
+ * long bpf_rc_keydown(void *ctx, u32 protocol, u64 scancode, u32 toggle)
* Description
* This helper is used in programs implementing IR decoding, to
* report a successfully decoded key press with *scancode*,
@@ -2370,7 +2373,7 @@ union bpf_attr {
* Return
* A pointer to the local storage area.
*
- * int bpf_sk_select_reuseport(struct sk_reuseport_md *reuse, struct bpf_map *map, void *key, u64 flags)
+ * long bpf_sk_select_reuseport(struct sk_reuseport_md *reuse, struct bpf_map *map, void *key, u64 flags)
* Description
* Select a **SO_REUSEPORT** socket from a
* **BPF_MAP_TYPE_REUSEPORT_ARRAY** *map*.
@@ -2471,7 +2474,7 @@ union bpf_attr {
* result is from *reuse*\ **->socks**\ [] using the hash of the
* tuple.
*
- * int bpf_sk_release(struct bpf_sock *sock)
+ * long bpf_sk_release(struct bpf_sock *sock)
* Description
* Release the reference held by *sock*. *sock* must be a
* non-**NULL** pointer that was returned from
@@ -2479,7 +2482,7 @@ union bpf_attr {
* Return
* 0 on success, or a negative error in case of failure.
*
- * int bpf_map_push_elem(struct bpf_map *map, const void *value, u64 flags)
+ * long bpf_map_push_elem(struct bpf_map *map, const void *value, u64 flags)
* Description
* Push an element *value* in *map*. *flags* is one of:
*
@@ -2489,19 +2492,19 @@ union bpf_attr {
* Return
* 0 on success, or a negative error in case of failure.
*
- * int bpf_map_pop_elem(struct bpf_map *map, void *value)
+ * long bpf_map_pop_elem(struct bpf_map *map, void *value)
* Description
* Pop an element from *map*.
* Return
* 0 on success, or a negative error in case of failure.
*
- * int bpf_map_peek_elem(struct bpf_map *map, void *value)
+ * long bpf_map_peek_elem(struct bpf_map *map, void *value)
* Description
* Get an element from *map* without removing it.
* Return
* 0 on success, or a negative error in case of failure.
*
- * int bpf_msg_push_data(struct sk_msg_buff *msg, u32 start, u32 len, u64 flags)
+ * long bpf_msg_push_data(struct sk_msg_buff *msg, u32 start, u32 len, u64 flags)
* Description
* For socket policies, insert *len* bytes into *msg* at offset
* *start*.
@@ -2517,7 +2520,7 @@ union bpf_attr {
* Return
* 0 on success, or a negative error in case of failure.
*
- * int bpf_msg_pop_data(struct sk_msg_buff *msg, u32 start, u32 len, u64 flags)
+ * long bpf_msg_pop_data(struct sk_msg_buff *msg, u32 start, u32 len, u64 flags)
* Description
* Will remove *len* bytes from a *msg* starting at byte *start*.
* This may result in **ENOMEM** errors under certain situations if
@@ -2529,7 +2532,7 @@ union bpf_attr {
* Return
* 0 on success, or a negative error in case of failure.
*
- * int bpf_rc_pointer_rel(void *ctx, s32 rel_x, s32 rel_y)
+ * long bpf_rc_pointer_rel(void *ctx, s32 rel_x, s32 rel_y)
* Description
* This helper is used in programs implementing IR decoding, to
* report a successfully decoded pointer movement.
@@ -2543,7 +2546,7 @@ union bpf_attr {
* Return
* 0
*
- * int bpf_spin_lock(struct bpf_spin_lock *lock)
+ * long bpf_spin_lock(struct bpf_spin_lock *lock)
* Description
* Acquire a spinlock represented by the pointer *lock*, which is
* stored as part of a value of a map. Taking the lock allows to
@@ -2591,7 +2594,7 @@ union bpf_attr {
* Return
* 0
*
- * int bpf_spin_unlock(struct bpf_spin_lock *lock)
+ * long bpf_spin_unlock(struct bpf_spin_lock *lock)
* Description
* Release the *lock* previously locked by a call to
* **bpf_spin_lock**\ (\ *lock*\ ).
@@ -2614,7 +2617,7 @@ union bpf_attr {
* A **struct bpf_tcp_sock** pointer on success, or **NULL** in
* case of failure.
*
- * int bpf_skb_ecn_set_ce(struct sk_buff *skb)
+ * long bpf_skb_ecn_set_ce(struct sk_buff *skb)
* Description
* Set ECN (Explicit Congestion Notification) field of IP header
* to **CE** (Congestion Encountered) if current value is **ECT**
@@ -2651,7 +2654,7 @@ union bpf_attr {
* result is from *reuse*\ **->socks**\ [] using the hash of the
* tuple.
*
- * int bpf_tcp_check_syncookie(struct bpf_sock *sk, void *iph, u32 iph_len, struct tcphdr *th, u32 th_len)
+ * long bpf_tcp_check_syncookie(struct bpf_sock *sk, void *iph, u32 iph_len, struct tcphdr *th, u32 th_len)
* Description
* Check whether *iph* and *th* contain a valid SYN cookie ACK for
* the listening socket in *sk*.
@@ -2666,7 +2669,7 @@ union bpf_attr {
* 0 if *iph* and *th* are a valid SYN cookie ACK, or a negative
* error otherwise.
*
- * int bpf_sysctl_get_name(struct bpf_sysctl *ctx, char *buf, size_t buf_len, u64 flags)
+ * long bpf_sysctl_get_name(struct bpf_sysctl *ctx, char *buf, size_t buf_len, u64 flags)
* Description
* Get name of sysctl in /proc/sys/ and copy it into provided by
* program buffer *buf* of size *buf_len*.
@@ -2682,7 +2685,7 @@ union bpf_attr {
* **-E2BIG** if the buffer wasn't big enough (*buf* will contain
* truncated name in this case).
*
- * int bpf_sysctl_get_current_value(struct bpf_sysctl *ctx, char *buf, size_t buf_len)
+ * long bpf_sysctl_get_current_value(struct bpf_sysctl *ctx, char *buf, size_t buf_len)
* Description
* Get current value of sysctl as it is presented in /proc/sys
* (incl. newline, etc), and copy it as a string into provided
@@ -2701,7 +2704,7 @@ union bpf_attr {
* **-EINVAL** if current value was unavailable, e.g. because
* sysctl is uninitialized and read returns -EIO for it.
*
- * int bpf_sysctl_get_new_value(struct bpf_sysctl *ctx, char *buf, size_t buf_len)
+ * long bpf_sysctl_get_new_value(struct bpf_sysctl *ctx, char *buf, size_t buf_len)
* Description
* Get new value being written by user space to sysctl (before
* the actual write happens) and copy it as a string into
@@ -2718,7 +2721,7 @@ union bpf_attr {
*
* **-EINVAL** if sysctl is being read.
*
- * int bpf_sysctl_set_new_value(struct bpf_sysctl *ctx, const char *buf, size_t buf_len)
+ * long bpf_sysctl_set_new_value(struct bpf_sysctl *ctx, const char *buf, size_t buf_len)
* Description
* Override new value being written by user space to sysctl with
* value provided by program in buffer *buf* of size *buf_len*.
@@ -2735,7 +2738,7 @@ union bpf_attr {
*
* **-EINVAL** if sysctl is being read.
*
- * int bpf_strtol(const char *buf, size_t buf_len, u64 flags, long *res)
+ * long bpf_strtol(const char *buf, size_t buf_len, u64 flags, long *res)
* Description
* Convert the initial part of the string from buffer *buf* of
* size *buf_len* to a long integer according to the given base
@@ -2759,7 +2762,7 @@ union bpf_attr {
*
* **-ERANGE** if resulting value was out of range.
*
- * int bpf_strtoul(const char *buf, size_t buf_len, u64 flags, unsigned long *res)
+ * long bpf_strtoul(const char *buf, size_t buf_len, u64 flags, unsigned long *res)
* Description
* Convert the initial part of the string from buffer *buf* of
* size *buf_len* to an unsigned long integer according to the
@@ -2810,7 +2813,7 @@ union bpf_attr {
* **NULL** if not found or there was an error in adding
* a new bpf-local-storage.
*
- * int bpf_sk_storage_delete(struct bpf_map *map, struct bpf_sock *sk)
+ * long bpf_sk_storage_delete(struct bpf_map *map, struct bpf_sock *sk)
* Description
* Delete a bpf-local-storage from a *sk*.
* Return
@@ -2818,7 +2821,7 @@ union bpf_attr {
*
* **-ENOENT** if the bpf-local-storage cannot be found.
*
- * int bpf_send_signal(u32 sig)
+ * long bpf_send_signal(u32 sig)
* Description
* Send signal *sig* to the process of the current task.
* The signal may be delivered to any of this process's threads.
@@ -2859,7 +2862,7 @@ union bpf_attr {
*
* **-EPROTONOSUPPORT** IP packet version is not 4 or 6
*
- * int bpf_skb_output(void *ctx, struct bpf_map *map, u64 flags, void *data, u64 size)
+ * long bpf_skb_output(void *ctx, struct bpf_map *map, u64 flags, void *data, u64 size)
* Description
* Write raw *data* blob into a special BPF perf event held by
* *map* of type **BPF_MAP_TYPE_PERF_EVENT_ARRAY**. This perf
@@ -2883,21 +2886,21 @@ union bpf_attr {
* Return
* 0 on success, or a negative error in case of failure.
*
- * int bpf_probe_read_user(void *dst, u32 size, const void *unsafe_ptr)
+ * long bpf_probe_read_user(void *dst, u32 size, const void *unsafe_ptr)
* Description
* Safely attempt to read *size* bytes from user space address
* *unsafe_ptr* and store the data in *dst*.
* Return
* 0 on success, or a negative error in case of failure.
*
- * int bpf_probe_read_kernel(void *dst, u32 size, const void *unsafe_ptr)
+ * long bpf_probe_read_kernel(void *dst, u32 size, const void *unsafe_ptr)
* Description
* Safely attempt to read *size* bytes from kernel space address
* *unsafe_ptr* and store the data in *dst*.
* Return
* 0 on success, or a negative error in case of failure.
*
- * int bpf_probe_read_user_str(void *dst, u32 size, const void *unsafe_ptr)
+ * long bpf_probe_read_user_str(void *dst, u32 size, const void *unsafe_ptr)
* Description
* Copy a NUL terminated string from an unsafe user address
* *unsafe_ptr* to *dst*. The *size* should include the
@@ -2941,7 +2944,7 @@ union bpf_attr {
* including the trailing NUL character. On error, a negative
* value.
*
- * int bpf_probe_read_kernel_str(void *dst, u32 size, const void *unsafe_ptr)
+ * long bpf_probe_read_kernel_str(void *dst, u32 size, const void *unsafe_ptr)
* Description
* Copy a NUL terminated string from an unsafe kernel address *unsafe_ptr*
* to *dst*. Same semantics as with **bpf_probe_read_user_str**\ () apply.
@@ -2949,14 +2952,14 @@ union bpf_attr {
* On success, the strictly positive length of the string, including
* the trailing NUL character. On error, a negative value.
*
- * int bpf_tcp_send_ack(void *tp, u32 rcv_nxt)
+ * long bpf_tcp_send_ack(void *tp, u32 rcv_nxt)
* Description
* Send out a tcp-ack. *tp* is the in-kernel struct **tcp_sock**.
* *rcv_nxt* is the ack_seq to be sent out.
* Return
* 0 on success, or a negative error in case of failure.
*
- * int bpf_send_signal_thread(u32 sig)
+ * long bpf_send_signal_thread(u32 sig)
* Description
* Send signal *sig* to the thread corresponding to the current task.
* Return
@@ -2976,7 +2979,7 @@ union bpf_attr {
* Return
* The 64 bit jiffies
*
- * int bpf_read_branch_records(struct bpf_perf_event_data *ctx, void *buf, u32 size, u64 flags)
+ * long bpf_read_branch_records(struct bpf_perf_event_data *ctx, void *buf, u32 size, u64 flags)
* Description
* For an eBPF program attached to a perf event, retrieve the
* branch records (**struct perf_branch_entry**) associated to *ctx*
@@ -2995,7 +2998,7 @@ union bpf_attr {
*
* **-ENOENT** if architecture does not support branch records.
*
- * int bpf_get_ns_current_pid_tgid(u64 dev, u64 ino, struct bpf_pidns_info *nsdata, u32 size)
+ * long bpf_get_ns_current_pid_tgid(u64 dev, u64 ino, struct bpf_pidns_info *nsdata, u32 size)
* Description
* Returns 0 on success, values for *pid* and *tgid* as seen from the current
* *namespace* will be returned in *nsdata*.
@@ -3007,7 +3010,7 @@ union bpf_attr {
*
* **-ENOENT** if pidns does not exists for the current task.
*
- * int bpf_xdp_output(void *ctx, struct bpf_map *map, u64 flags, void *data, u64 size)
+ * long bpf_xdp_output(void *ctx, struct bpf_map *map, u64 flags, void *data, u64 size)
* Description
* Write raw *data* blob into a special BPF perf event held by
* *map* of type **BPF_MAP_TYPE_PERF_EVENT_ARRAY**. This perf
@@ -3062,7 +3065,7 @@ union bpf_attr {
* Return
* The id is returned or 0 in case the id could not be retrieved.
*
- * int bpf_sk_assign(struct sk_buff *skb, struct bpf_sock *sk, u64 flags)
+ * long bpf_sk_assign(struct sk_buff *skb, struct bpf_sock *sk, u64 flags)
* Description
* Assign the *sk* to the *skb*. When combined with appropriate
* routing configuration to receive the packet towards the socket,
@@ -3097,7 +3100,7 @@ union bpf_attr {
* Return
* Current *ktime*.
*
- * int bpf_seq_printf(struct seq_file *m, const char *fmt, u32 fmt_size, const void *data, u32 data_len)
+ * long bpf_seq_printf(struct seq_file *m, const char *fmt, u32 fmt_size, const void *data, u32 data_len)
* Description
* **bpf_seq_printf**\ () uses seq_file **seq_printf**\ () to print
* out the format string.
@@ -3126,7 +3129,7 @@ union bpf_attr {
*
* **-EOVERFLOW** if an overflow happened: The same object will be tried again.
*
- * int bpf_seq_write(struct seq_file *m, const void *data, u32 len)
+ * long bpf_seq_write(struct seq_file *m, const void *data, u32 len)
* Description
* **bpf_seq_write**\ () uses seq_file **seq_write**\ () to write the data.
* The *m* represents the seq_file. The *data* and *len* represent the
@@ -3221,7 +3224,7 @@ union bpf_attr {
* Return
* Requested value, or 0, if flags are not recognized.
*
- * int bpf_csum_level(struct sk_buff *skb, u64 level)
+ * long bpf_csum_level(struct sk_buff *skb, u64 level)
* Description
* Change the skbs checksum level by one layer up or down, or
* reset it entirely to none in order to have the stack perform
@@ -3252,6 +3255,69 @@ union bpf_attr {
* case of **BPF_CSUM_LEVEL_QUERY**, the current skb->csum_level
* is returned or the error code -EACCES in case the skb is not
* subject to CHECKSUM_UNNECESSARY.
+ *
+ * struct tcp6_sock *bpf_skc_to_tcp6_sock(void *sk)
+ * Description
+ * Dynamically cast a *sk* pointer to a *tcp6_sock* pointer.
+ * Return
+ * *sk* if casting is valid, or NULL otherwise.
+ *
+ * struct tcp_sock *bpf_skc_to_tcp_sock(void *sk)
+ * Description
+ * Dynamically cast a *sk* pointer to a *tcp_sock* pointer.
+ * Return
+ * *sk* if casting is valid, or NULL otherwise.
+ *
+ * struct tcp_timewait_sock *bpf_skc_to_tcp_timewait_sock(void *sk)
+ * Description
+ * Dynamically cast a *sk* pointer to a *tcp_timewait_sock* pointer.
+ * Return
+ * *sk* if casting is valid, or NULL otherwise.
+ *
+ * struct tcp_request_sock *bpf_skc_to_tcp_request_sock(void *sk)
+ * Description
+ * Dynamically cast a *sk* pointer to a *tcp_request_sock* pointer.
+ * Return
+ * *sk* if casting is valid, or NULL otherwise.
+ *
+ * struct udp6_sock *bpf_skc_to_udp6_sock(void *sk)
+ * Description
+ * Dynamically cast a *sk* pointer to a *udp6_sock* pointer.
+ * Return
+ * *sk* if casting is valid, or NULL otherwise.
+ *
+ * long bpf_get_task_stack(struct task_struct *task, void *buf, u32 size, u64 flags)
+ * Description
+ * Return a user or a kernel stack in bpf program provided buffer.
+ * To achieve this, the helper needs *task*, which is a valid
+ * pointer to struct task_struct. To store the stacktrace, the
+ * bpf program provides *buf* with a nonnegative *size*.
+ *
+ * The last argument, *flags*, holds the number of stack frames to
+ * skip (from 0 to 255), masked with
+ * **BPF_F_SKIP_FIELD_MASK**. The next bits can be used to set
+ * the following flags:
+ *
+ * **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.
+ *
+ * **bpf_get_task_stack**\ () can collect up to
+ * **PERF_MAX_STACK_DEPTH** both kernel and user frames, subject
+ * to sufficient large buffer size. Note that
+ * this limit can be controlled with the **sysctl** program, and
+ * that it should be manually increased in order to profile long
+ * user stacks (such as stacks for Java programs). To do so, use:
+ *
+ * ::
+ *
+ * # sysctl kernel.perf_event_max_stack=<new value>
+ * Return
+ * A non-negative value equal to or less than *size* on success,
+ * or a negative error in case of failure.
+ *
*/
#define __BPF_FUNC_MAPPER(FN) \
FN(unspec), \
@@ -3389,7 +3455,14 @@ union bpf_attr {
FN(ringbuf_submit), \
FN(ringbuf_discard), \
FN(ringbuf_query), \
- FN(csum_level),
+ FN(csum_level), \
+ FN(skc_to_tcp6_sock), \
+ FN(skc_to_tcp_sock), \
+ FN(skc_to_tcp_timewait_sock), \
+ FN(skc_to_tcp_request_sock), \
+ FN(skc_to_udp6_sock), \
+ FN(get_task_stack), \
+ /* */
/* integer value in 'imm' field of BPF_CALL instruction selects which helper
* function eBPF program intends to call
generated by cgit v1.2.3-58-ga151 (git 2.39.0) at 2024-12-15 07:31:09 +0000