The commit is pushed to "branch-rh9-5.14.0-162.6.1.vz9.18.x-ovz" and will
appear at https://src.openvz.org/scm/ovz/vzkernel.git
after rh9-5.14.0-162.6.1.vz9.18.2
------>
commit ced811694fe67c4a61c688f736eeb66686a26ec8
Author: Menglong Dong <imaged...@tencent.com>
Date: Tue Jan 3 17:39:30 2023 +0200
skb: add some helpers for skb drop reasons
In order to simply the definition and assignment for
'enum skb_drop_reason', introduce some helpers.
SKB_DR() is used to define a variable of type 'enum skb_drop_reason'
with the 'SKB_DROP_REASON_NOT_SPECIFIED' initial value.
SKB_DR_SET() is used to set the value of the variable. Seems it is
a little useless? But it makes the code shorter.
SKB_DR_OR() is used to set the value of the variable if it is not set
yet, which means its value is SKB_DROP_REASON_NOT_SPECIFIED.
Signed-off-by: Menglong Dong <imaged...@tencent.com>
Reviewed-by: Jiang Biao <benbji...@tencent.com>
Reviewed-by: Hao Peng <flyingp...@tencent.com>
Signed-off-by: David S. Miller <da...@davemloft.net>
Acked-by: Nikolay Borisov <nbori...@suse.com>
Signed-off-by: Nikolay Borisov <nikolay.bori...@virtuozzo.com>
======
Patchset description:
ms/net: Annotate skb free sites with reason
This series backports most of the patches that add a reason to skb free
sites.
https://jira.sw.ru/browse/PSBM-143302
Feature: net: improve verbosity of dropped packets reporting
---
include/linux/skbuff.h | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 4a79a2d8cb83..47047dc588aa 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -448,6 +448,18 @@ enum skb_drop_reason {
SKB_DROP_REASON_MAX,
};
+#define SKB_DR_INIT(name, reason) \
+ enum skb_drop_reason name = SKB_DROP_REASON_##reason
+#define SKB_DR(name) \
+ SKB_DR_INIT(name, NOT_SPECIFIED)
+#define SKB_DR_SET(name, reason) \
+ (name = SKB_DROP_REASON_##reason)
+#define SKB_DR_OR(name, reason) \
+ do { \
+ if (name == SKB_DROP_REASON_NOT_SPECIFIED) \
+ SKB_DR_SET(name, reason); \
+ } while (0)
+
/* To allow 64K frame to be packed as single skb without frag_list we
* require 64K/PAGE_SIZE pages plus 1 additional page to allow for
* buffers which do not start on a page boundary.
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