[Bug 216304] New: ip(7) IP_MTU_DISCOVER description is incomplete

[Bug 216304] New: ip(7) IP_MTU_DISCOVER description is incomplete

[bugzilla-daemon]

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: documentation_man-pages@kernel-bugs.osdl.org
          Reporter: pspacek@isc.org
        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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