https://bugs.dpdk.org/show_bug.cgi?id=1731
Bug ID: 1731
Summary: FIB insertion error(-28) after remove all rules
Product: DPDK
Version: 25.03
Hardware: All
OS: All
Status: UNCONFIRMED
Severity: normal
Priority: Normal
Component: other
Assignee: dev@dpdk.org
Reporter: k...@servers.com
Target Milestone: ---
Created attachment 321
--> https://bugs.dpdk.org/attachment.cgi?id=321&action=edit
FIB error example
The error is due to overflow of the internal FIB counter "rsvd_tbl8s". After
this error occurs, it is impossible to add any rules even the FIB is empty.
To reproduce this error, simply insert two IP addresses of the following type
with the same next-hope parameter (this is important):
struct Network {
uint32_t ip;
uint16_t prefix;
};
/*
first insertion with prefix less than 25 doesn't allocate tbl8 entry
second insertion with prefix more than 24 will allocate tbl8 entry BUT only
when we pass the different next hope
*/
const struct Network state[] = {
{0x3000000, 15}, {0x3000520, 29}
};
and delete them. Deleting the first rule will allocate tbl8 entry but
"rsvd_tbl8s" counter won't increment. Deleting the second rule will decrease
the counter "rsvd_tbl8s" and it will overflow.
The full reproduce program is in attachment.
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