diff options
author | Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2020-04-30 19:04:28 +0300 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2020-04-30 22:56:38 +0300 |
commit | d2461edde7d15121a2cd39d48cd39edbd3fa019a (patch) | |
tree | 16d2dbb19a3877df27deb8c0c570e12c75cf480f | |
parent | 32c0f0bed5bb08625083ed7f5b661c842d63ebd1 (diff) | |
download | linux-d2461edde7d15121a2cd39d48cd39edbd3fa019a.tar.xz |
docs: networking: convert tc-actions-env-rules.txt to ReST
- add SPDX header;
- add a document title;
- use the right numbered list markup;
- adjust identation, whitespaces and blank lines where needed;
- add to networking/index.rst.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r-- | Documentation/networking/index.rst | 1 | ||||
-rw-r--r-- | Documentation/networking/tc-actions-env-rules.rst | 29 | ||||
-rw-r--r-- | Documentation/networking/tc-actions-env-rules.txt | 24 |
3 files changed, 30 insertions, 24 deletions
diff --git a/Documentation/networking/index.rst b/Documentation/networking/index.rst index 5e495804f96f..f53d89b5679a 100644 --- a/Documentation/networking/index.rst +++ b/Documentation/networking/index.rst @@ -106,6 +106,7 @@ Contents: skfp strparser switchdev + tc-actions-env-rules .. only:: subproject and html diff --git a/Documentation/networking/tc-actions-env-rules.rst b/Documentation/networking/tc-actions-env-rules.rst new file mode 100644 index 000000000000..86884b8fb4e0 --- /dev/null +++ b/Documentation/networking/tc-actions-env-rules.rst @@ -0,0 +1,29 @@ +.. SPDX-License-Identifier: GPL-2.0 + +================================ +TC Actions - Environmental Rules +================================ + + +The "environmental" rules for authors of any new tc actions are: + +1) If you stealeth or borroweth any packet thou shalt be branching + from the righteous path and thou shalt cloneth. + + For example if your action queues a packet to be processed later, + or intentionally branches by redirecting a packet, then you need to + clone the packet. + +2) If you munge any packet thou shalt call pskb_expand_head in the case + someone else is referencing the skb. After that you "own" the skb. + +3) Dropping packets you don't own is a no-no. You simply return + TC_ACT_SHOT to the caller and they will drop it. + +The "environmental" rules for callers of actions (qdiscs etc) are: + +#) Thou art responsible for freeing anything returned as being + TC_ACT_SHOT/STOLEN/QUEUED. If none of TC_ACT_SHOT/STOLEN/QUEUED is + returned, then all is great and you don't need to do anything. + +Post on netdev if something is unclear. diff --git a/Documentation/networking/tc-actions-env-rules.txt b/Documentation/networking/tc-actions-env-rules.txt deleted file mode 100644 index f37814693ad3..000000000000 --- a/Documentation/networking/tc-actions-env-rules.txt +++ /dev/null @@ -1,24 +0,0 @@ - -The "environmental" rules for authors of any new tc actions are: - -1) If you stealeth or borroweth any packet thou shalt be branching -from the righteous path and thou shalt cloneth. - -For example if your action queues a packet to be processed later, -or intentionally branches by redirecting a packet, then you need to -clone the packet. - -2) If you munge any packet thou shalt call pskb_expand_head in the case -someone else is referencing the skb. After that you "own" the skb. - -3) Dropping packets you don't own is a no-no. You simply return -TC_ACT_SHOT to the caller and they will drop it. - -The "environmental" rules for callers of actions (qdiscs etc) are: - -*) Thou art responsible for freeing anything returned as being -TC_ACT_SHOT/STOLEN/QUEUED. If none of TC_ACT_SHOT/STOLEN/QUEUED is -returned, then all is great and you don't need to do anything. - -Post on netdev if something is unclear. - |