bpf: fix up uapi helper description and sync bpf header with tools
Minor markup fixup from bpf-next into net-next merge in the BPF helper description of bpf_sk_lookup_tcp() and bpf_sk_lookup_udp(). Also sync up the copy of bpf.h from tooling infrastructure. Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Daniel Borkmann
David S. Miller
Родитель
addb067983
Коммит
0bd72117fb
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@ -2218,9 +2218,9 @@ union bpf_attr {
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* This helper is available only if the kernel was compiled with
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* **CONFIG_NET** configuration option.
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* Return
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* Pointer to *struct bpf_sock*, or NULL in case of failure.
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* For sockets with reuseport option, the *struct bpf_sock*
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* result is from reuse->socks[] using the hash of the tuple.
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* Pointer to **struct bpf_sock**, or **NULL** in case of failure.
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* For sockets with reuseport option, the **struct bpf_sock**
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* result is from **reuse->socks**\ [] using the hash of the tuple.
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*
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* struct bpf_sock *bpf_sk_lookup_udp(void *ctx, struct bpf_sock_tuple *tuple, u32 tuple_size, u64 netns, u64 flags)
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* Description
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@ -2254,9 +2254,9 @@ union bpf_attr {
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* This helper is available only if the kernel was compiled with
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* **CONFIG_NET** configuration option.
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* Return
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* Pointer to *struct bpf_sock*, or NULL in case of failure.
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* For sockets with reuseport option, the *struct bpf_sock*
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* result is from reuse->socks[] using the hash of the tuple.
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* Pointer to **struct bpf_sock**, or **NULL** in case of failure.
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* For sockets with reuseport option, the **struct bpf_sock**
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* result is from **reuse->socks**\ [] using the hash of the tuple.
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*
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* int bpf_sk_release(struct bpf_sock *sock)
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* Description
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@ -502,18 +502,6 @@ union bpf_attr {
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* Return
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* 0 on success, or a negative error in case of failure.
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*
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* int bpf_map_pop_elem(struct bpf_map *map, void *value)
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* Description
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* Pop an element from *map*.
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* Return
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* 0 on success, or a negative error in case of failure.
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*
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* int bpf_map_peek_elem(struct bpf_map *map, void *value)
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* Description
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* Get an element from *map* without removing it.
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* Return
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* 0 on success, or a negative error in case of failure.
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*
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* int bpf_probe_read(void *dst, u32 size, const void *src)
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* Description
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* For tracing programs, safely attempt to read *size* bytes from
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@ -1937,9 +1925,9 @@ union bpf_attr {
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* is set to metric from route (IPv4/IPv6 only), and ifindex
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* is set to the device index of the nexthop from the FIB lookup.
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*
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* *plen* argument is the size of the passed in struct.
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* *flags* argument can be a combination of one or more of the
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* following values:
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* *plen* argument is the size of the passed in struct.
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* *flags* argument can be a combination of one or more of the
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* following values:
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*
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* **BPF_FIB_LOOKUP_DIRECT**
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* Do a direct table lookup vs full lookup using FIB
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@ -1948,9 +1936,9 @@ union bpf_attr {
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* Perform lookup from an egress perspective (default is
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* ingress).
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*
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* *ctx* is either **struct xdp_md** for XDP programs or
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* **struct sk_buff** tc cls_act programs.
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* Return
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* *ctx* is either **struct xdp_md** for XDP programs or
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* **struct sk_buff** tc cls_act programs.
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* Return
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* * < 0 if any input argument is invalid
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* * 0 on success (packet is forwarded, nexthop neighbor exists)
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* * > 0 one of **BPF_FIB_LKUP_RET_** codes explaining why the
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@ -2095,8 +2083,8 @@ union bpf_attr {
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* translated to a keycode using the rc keymap, and reported as
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* an input key down event. After a period a key up event is
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* generated. This period can be extended by calling either
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* **bpf_rc_keydown** () again with the same values, or calling
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* **bpf_rc_repeat** ().
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* **bpf_rc_keydown**\ () again with the same values, or calling
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* **bpf_rc_repeat**\ ().
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*
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* Some protocols include a toggle bit, in case the button was
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* released and pressed again between consecutive scancodes.
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@ -2179,21 +2167,22 @@ union bpf_attr {
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* The *flags* meaning is specific for each map type,
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* and has to be 0 for cgroup local storage.
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*
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* Depending on the bpf program type, a local storage area
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* can be shared between multiple instances of the bpf program,
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* Depending on the BPF program type, a local storage area
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* can be shared between multiple instances of the BPF program,
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* running simultaneously.
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*
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* A user should care about the synchronization by himself.
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* For example, by using the BPF_STX_XADD instruction to alter
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* For example, by using the **BPF_STX_XADD** instruction to alter
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* the shared data.
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* Return
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* Pointer to the local storage area.
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* A pointer to the local storage area.
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*
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* int bpf_sk_select_reuseport(struct sk_reuseport_md *reuse, struct bpf_map *map, void *key, u64 flags)
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* Description
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* Select a SO_REUSEPORT sk from a BPF_MAP_TYPE_REUSEPORT_ARRAY map
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* It checks the selected sk is matching the incoming
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* request in the skb.
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* Select a **SO_REUSEPORT** socket from a
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* **BPF_MAP_TYPE_REUSEPORT_ARRAY** *map*.
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* It checks the selected socket is matching the incoming
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* request in the socket buffer.
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* Return
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* 0 on success, or a negative error in case of failure.
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*
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@ -2201,7 +2190,7 @@ union bpf_attr {
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* Description
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* Look for TCP socket matching *tuple*, optionally in a child
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* network namespace *netns*. The return value must be checked,
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* and if non-NULL, released via **bpf_sk_release**\ ().
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* and if non-**NULL**, released via **bpf_sk_release**\ ().
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*
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* The *ctx* should point to the context of the program, such as
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* the skb or socket (depending on the hook in use). This is used
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@ -2229,15 +2218,15 @@ union bpf_attr {
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* This helper is available only if the kernel was compiled with
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* **CONFIG_NET** configuration option.
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* Return
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* Pointer to *struct bpf_sock*, or NULL in case of failure.
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* For sockets with reuseport option, the *struct bpf_sock*
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* result is from reuse->socks[] using the hash of the tuple.
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* Pointer to **struct bpf_sock**, or **NULL** in case of failure.
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* For sockets with reuseport option, the **struct bpf_sock**
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* result is from **reuse->socks**\ [] using the hash of the tuple.
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*
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* struct bpf_sock *bpf_sk_lookup_udp(void *ctx, struct bpf_sock_tuple *tuple, u32 tuple_size, u64 netns, u64 flags)
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* Description
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* Look for UDP socket matching *tuple*, optionally in a child
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* network namespace *netns*. The return value must be checked,
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* and if non-NULL, released via **bpf_sk_release**\ ().
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* and if non-**NULL**, released via **bpf_sk_release**\ ().
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*
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* The *ctx* should point to the context of the program, such as
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* the skb or socket (depending on the hook in use). This is used
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@ -2265,42 +2254,54 @@ union bpf_attr {
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* This helper is available only if the kernel was compiled with
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* **CONFIG_NET** configuration option.
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* Return
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* Pointer to *struct bpf_sock*, or NULL in case of failure.
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* For sockets with reuseport option, the *struct bpf_sock*
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* result is from reuse->socks[] using the hash of the tuple.
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* Pointer to **struct bpf_sock**, or **NULL** in case of failure.
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* For sockets with reuseport option, the **struct bpf_sock**
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* result is from **reuse->socks**\ [] using the hash of the tuple.
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*
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* int bpf_sk_release(struct bpf_sock *sk)
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* int bpf_sk_release(struct bpf_sock *sock)
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* Description
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* Release the reference held by *sock*. *sock* must be a non-NULL
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* pointer that was returned from bpf_sk_lookup_xxx\ ().
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* Release the reference held by *sock*. *sock* must be a
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* non-**NULL** pointer that was returned from
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* **bpf_sk_lookup_xxx**\ ().
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* Return
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* 0 on success, or a negative error in case of failure.
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*
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* int bpf_map_pop_elem(struct bpf_map *map, void *value)
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* Description
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* Pop an element from *map*.
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* Return
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* 0 on success, or a negative error in case of failure.
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*
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* int bpf_map_peek_elem(struct bpf_map *map, void *value)
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* Description
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* Get an element from *map* without removing it.
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* Return
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* 0 on success, or a negative error in case of failure.
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*
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* int bpf_msg_push_data(struct sk_buff *skb, u32 start, u32 len, u64 flags)
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* Description
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* For socket policies, insert *len* bytes into msg at offset
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* For socket policies, insert *len* bytes into *msg* at offset
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* *start*.
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*
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* If a program of type **BPF_PROG_TYPE_SK_MSG** is run on a
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* *msg* it may want to insert metadata or options into the msg.
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* *msg* it may want to insert metadata or options into the *msg*.
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* This can later be read and used by any of the lower layer BPF
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* hooks.
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*
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* This helper may fail if under memory pressure (a malloc
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* fails) in these cases BPF programs will get an appropriate
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* error and BPF programs will need to handle them.
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*
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* Return
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* 0 on success, or a negative error in case of failure.
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*
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* int bpf_msg_pop_data(struct sk_msg_buff *msg, u32 start, u32 pop, u64 flags)
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* Description
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* Description
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* Will remove *pop* bytes from a *msg* starting at byte *start*.
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* This may result in **ENOMEM** errors under certain situations if
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* an allocation and copy are required due to a full ring buffer.
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* However, the helper will try to avoid doing the allocation
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* if possible. Other errors can occur if input parameters are
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* invalid either due to *start* byte not being valid part of msg
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* invalid either due to *start* byte not being valid part of *msg*
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* payload and/or *pop* value being to large.
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* Return
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* 0 on success, or a negative error in case of failure.
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