New: ip(7) IP_MTU_DISCOVER description is incomplete

https://bugzilla.kernel.org/show_bug.cgi?id=216304

Bug ID: 216304
Summary: ip(7) IP_MTU_DISCOVER description is incomplete
Product: Documentation
Version: unspecified
Hardware: All
OS: Linux
Status: NEW
Severity: normal
Priority: P1
Component: man-pages
Assignee: [email protected]
Reporter: [email protected]
Regression: No

Two Path MTU discovery values are missing in man 7 ip:
- IP_PMTUDISC_INTERFACE
- IP_PMTUDISC_OMIT
Those are mentioned in include/uapi/linux/in.h.

/proc/sys/net/ipv4/ip_no_pmtu_disc accepts other values than 0 and 1. This is mentioned in Documentation/networking/ip-sysctl.rst.

Also, I have a bad feeling that conditions when Don't Fragment flag is set is somehow incomplete but I cannot really point finger on it. I apologize for being so vague!

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