bpf: fix recurring typo in documentation for BPF helpers

"Underlaying packet buffer" should be an "underlying" one, in the
warning about invalidated data and data_end pointers. Through
copy-and-paste, the typo occurred no fewer than 19 times in the
documentation. Let's fix it.

Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com>
Acked-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>

diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h
index 72336ba..989ef6b 100644 (file)
--- a/include/uapi/linux/bpf.h
+++ b/include/uapi/linux/bpf.h
@@ -629,7 +629,7 @@ union bpf_attr {
  *             **BPF_F_INVALIDATE_HASH** (set *skb*\ **->hash**, *skb*\
  *             **->swhash** and *skb*\ **->l4hash** to 0).
  *
- *             A call to this helper is susceptible to change the underlaying
+ *             A call to this helper is susceptible to change the underlying
  *             packet buffer. Therefore, at load time, all checks on pointers
  *             previously done by the verifier are invalidated and must be
  *             performed again, if the helper is used in combination with
@@ -654,7 +654,7 @@ union bpf_attr {
  *             flexibility and can handle sizes larger than 2 or 4 for the
  *             checksum to update.
  *
- *             A call to this helper is susceptible to change the underlaying
+ *             A call to this helper is susceptible to change the underlying
  *             packet buffer. Therefore, at load time, all checks on pointers
  *             previously done by the verifier are invalidated and must be
  *             performed again, if the helper is used in combination with
@@ -686,7 +686,7 @@ union bpf_attr {
  *             flexibility and can handle sizes larger than 2 or 4 for the
  *             checksum to update.
  *
- *             A call to this helper is susceptible to change the underlaying
+ *             A call to this helper is susceptible to change the underlying
  *             packet buffer. Therefore, at load time, all checks on pointers
  *             previously done by the verifier are invalidated and must be
  *             performed again, if the helper is used in combination with
@@ -741,7 +741,7 @@ union bpf_attr {
  *             efficient, but it is handled through an action code where the
  *             redirection happens only after the eBPF program has returned.
  *
- *             A call to this helper is susceptible to change the underlaying
+ *             A call to this helper is susceptible to change the underlying
  *             packet buffer. Therefore, at load time, all checks on pointers
  *             previously done by the verifier are invalidated and must be
  *             performed again, if the helper is used in combination with
@@ -806,7 +806,7 @@ union bpf_attr {
  *             **ETH_P_8021Q** and **ETH_P_8021AD**, it is considered to
  *             be **ETH_P_8021Q**.
  *
- *             A call to this helper is susceptible to change the underlaying
+ *             A call to this helper is susceptible to change the underlying
  *             packet buffer. Therefore, at load time, all checks on pointers
  *             previously done by the verifier are invalidated and must be
  *             performed again, if the helper is used in combination with
@@ -818,7 +818,7 @@ union bpf_attr {
  *     Description
  *             Pop a VLAN header from the packet associated to *skb*.
  *
- *             A call to this helper is susceptible to change the underlaying
+ *             A call to this helper is susceptible to change the underlying
  *             packet buffer. Therefore, at load time, all checks on pointers
  *             previously done by the verifier are invalidated and must be
  *             performed again, if the helper is used in combination with
@@ -1168,7 +1168,7 @@ union bpf_attr {
  *             All values for *flags* are reserved for future usage, and must
  *             be left at zero.
  *
- *             A call to this helper is susceptible to change the underlaying
+ *             A call to this helper is susceptible to change the underlying
  *             packet buffer. Therefore, at load time, all checks on pointers
  *             previously done by the verifier are invalidated and must be
  *             performed again, if the helper is used in combination with
@@ -1281,7 +1281,7 @@ union bpf_attr {
  *             implicitly linearizes, unclones and drops offloads from the
  *             *skb*.
  *
- *             A call to this helper is susceptible to change the underlaying
+ *             A call to this helper is susceptible to change the underlying
  *             packet buffer. Therefore, at load time, all checks on pointers
  *             previously done by the verifier are invalidated and must be
  *             performed again, if the helper is used in combination with
@@ -1317,7 +1317,7 @@ union bpf_attr {
  *             **bpf_skb_pull_data()** to effectively unclone the *skb* from
  *             the very beginning in case it is indeed cloned.
  *
- *             A call to this helper is susceptible to change the underlaying
+ *             A call to this helper is susceptible to change the underlying
  *             packet buffer. Therefore, at load time, all checks on pointers
  *             previously done by the verifier are invalidated and must be
  *             performed again, if the helper is used in combination with
@@ -1369,7 +1369,7 @@ union bpf_attr {
  *             All values for *flags* are reserved for future usage, and must
  *             be left at zero.
  *
- *             A call to this helper is susceptible to change the underlaying
+ *             A call to this helper is susceptible to change the underlying
  *             packet buffer. Therefore, at load time, all checks on pointers
  *             previously done by the verifier are invalidated and must be
  *             performed again, if the helper is used in combination with
@@ -1384,7 +1384,7 @@ union bpf_attr {
  *             can be used to prepare the packet for pushing or popping
  *             headers.
  *
- *             A call to this helper is susceptible to change the underlaying
+ *             A call to this helper is susceptible to change the underlying
  *             packet buffer. Therefore, at load time, all checks on pointers
  *             previously done by the verifier are invalidated and must be
  *             performed again, if the helper is used in combination with
@@ -1531,7 +1531,7 @@ union bpf_attr {
  *               Use with ENCAP_L3/L4 flags to further specify the tunnel
  *               type; **len** is the length of the inner MAC header.
  *
- *             A call to this helper is susceptible to change the underlaying
+ *             A call to this helper is susceptible to change the underlying
  *             packet buffer. Therefore, at load time, all checks on pointers
  *             previously done by the verifier are invalidated and must be
  *             performed again, if the helper is used in combination with
@@ -1610,7 +1610,7 @@ union bpf_attr {
  *             more flexibility as the user is free to store whatever meta
  *             data they need.
  *
- *             A call to this helper is susceptible to change the underlaying
+ *             A call to this helper is susceptible to change the underlying
  *             packet buffer. Therefore, at load time, all checks on pointers
  *             previously done by the verifier are invalidated and must be
  *             performed again, if the helper is used in combination with
@@ -1852,7 +1852,7 @@ union bpf_attr {
  *             copied if necessary (i.e. if data was not linear and if start
  *             and end pointers do not point to the same chunk).
  *
- *             A call to this helper is susceptible to change the underlaying
+ *             A call to this helper is susceptible to change the underlying
  *             packet buffer. Therefore, at load time, all checks on pointers
  *             previously done by the verifier are invalidated and must be
  *             performed again, if the helper is used in combination with
@@ -1886,7 +1886,7 @@ union bpf_attr {
  *             only possible to shrink the packet as of this writing,
  *             therefore *delta* must be a negative integer.
  *
- *             A call to this helper is susceptible to change the underlaying
+ *             A call to this helper is susceptible to change the underlying
  *             packet buffer. Therefore, at load time, all checks on pointers
  *             previously done by the verifier are invalidated and must be
  *             performed again, if the helper is used in combination with
@@ -2072,7 +2072,7 @@ union bpf_attr {
  *             by bpf programs of types BPF_PROG_TYPE_LWT_IN and
  *             BPF_PROG_TYPE_LWT_XMIT.
  *
- *             A call to this helper is susceptible to change the underlaying
+ *             A call to this helper is susceptible to change the underlying
  *             packet buffer. Therefore, at load time, all checks on pointers
  *             previously done by the verifier are invalidated and must be
  *             performed again, if the helper is used in combination with
@@ -2087,7 +2087,7 @@ union bpf_attr {
  *             inside the outermost IPv6 Segment Routing Header can be
  *             modified through this helper.
  *
- *             A call to this helper is susceptible to change the underlaying
+ *             A call to this helper is susceptible to change the underlying
  *             packet buffer. Therefore, at load time, all checks on pointers
  *             previously done by the verifier are invalidated and must be
  *             performed again, if the helper is used in combination with
@@ -2103,7 +2103,7 @@ union bpf_attr {
  *             after the segments are accepted. *delta* can be as well
  *             positive (growing) as negative (shrinking).
  *
- *             A call to this helper is susceptible to change the underlaying
+ *             A call to this helper is susceptible to change the underlying
  *             packet buffer. Therefore, at load time, all checks on pointers
  *             previously done by the verifier are invalidated and must be
  *             performed again, if the helper is used in combination with
@@ -2132,7 +2132,7 @@ union bpf_attr {
  *                     encapsulation policy.
  *                     Type of param: **struct ipv6_sr_hdr**.
  *
- *             A call to this helper is susceptible to change the underlaying
+ *             A call to this helper is susceptible to change the underlying
  *             packet buffer. Therefore, at load time, all checks on pointers
  *             previously done by the verifier are invalidated and must be
  *             performed again, if the helper is used in combination with