Date: Wed, 8 Feb 2023 12:49:46 +0800 From: Zhenlei Huang <zlei@FreeBSD.org> To: Gary Jennejohn <garyj@gmx.de> Cc: freebsd-current@freebsd.org Subject: Re: kernel compile fails if device bpf is not enabled Message-ID: <4FF5CEED-A667-455A-8BFC-960B50E8D93D@FreeBSD.org> In-Reply-To: <20230207100812.76d206d4@ernst.home> References: <20230207100812.76d206d4@ernst.home>
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--Apple-Mail=_5EEEAFA2-17B5-4EE2-B53F-82B1472F949E Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii Hi Gary, Thanks for the report! Post the fix to Phabricator = https://reviews.freebsd.org/D38432 <https://reviews.freebsd.org/D38432>; = . Best regards, Zhenlei > On Feb 7, 2023, at 5:08 PM, Gary Jennejohn <garyj@gmx.de> wrote: >=20 > I just saw this error today because I didn't have device bpf enabled = in > my kernel configuration file: >=20 > -------------------------------------------------------------- >>>> stage 3.1: building everything > -------------------------------------------------------------- > linking kernel.full > ld: error: undefined symbol: bpf_mtap_if >>>> referenced by if.c:4724 (/usr/src/sys/net/if.c:4724) >>>> if.o:(if_bpfmtap) >>>> referenced by if_tuntap.c:1717 (/usr/src/sys/net/if_tuntap.c:1717) >>>> if_tuntap.o:(tunread) >>>> referenced by if_vlan.c:1292 (/usr/src/sys/net/if_vlan.c:1292) >>>> if_vlan.o:(vlan_transmit) >=20 > ld: error: undefined symbol: bpf_mtap2_if >>>> referenced by if_gif.c:323 (/usr/src/sys/net/if_gif.c:323) >>>> if_gif.o:(gif_transmit) >>>> referenced by if_tuntap.c:1816 (/usr/src/sys/net/if_tuntap.c:1816) >>>> if_tuntap.o:(tunwrite) > --- kernel.full --- > *** [kernel.full] Error code 1 >=20 > This happens because a dummy bpf_mtap_if() (called a NOP stub in = bpf.c) > isn't being defined if bpf is not enabled. >=20 > -- > Gary Jennejohn >=20 --Apple-Mail=_5EEEAFA2-17B5-4EE2-B53F-82B1472F949E Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=us-ascii <html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; = charset=3Dus-ascii"></head><body style=3D"word-wrap: break-word; = -webkit-nbsp-mode: space; line-break: after-white-space;" class=3D""><div = class=3D"">Hi Gary,</div><div class=3D""><br class=3D""></div>Thanks for = the report! Post the fix to Phabricator <a = href=3D"https://reviews.freebsd.org/D38432" = class=3D"">https://reviews.freebsd.org/D38432</a> .<div = class=3D""><br class=3D""></div><div class=3D""><div style=3D"caret-color:= rgb(0, 0, 0); color: rgb(0, 0, 0);">Best regards,</div><div = style=3D"caret-color: rgb(0, 0, 0); color: rgb(0, 0, = 0);">Zhenlei</div><div><br class=3D""><blockquote type=3D"cite" = class=3D""><div class=3D"">On Feb 7, 2023, at 5:08 PM, Gary Jennejohn = <<a href=3D"mailto:garyj@gmx.de" class=3D"">garyj@gmx.de</a>> = wrote:</div><br class=3D"Apple-interchange-newline"><div class=3D""><div = class=3D"">I just saw this error today because I didn't have device bpf = enabled in<br class=3D"">my kernel configuration file:<br class=3D""><br = class=3D"">--------------------------------------------------------------<= br class=3D""><blockquote type=3D"cite" class=3D""><blockquote = type=3D"cite" class=3D""><blockquote type=3D"cite" class=3D"">stage 3.1: = building everything<br = class=3D""></blockquote></blockquote></blockquote>------------------------= --------------------------------------<br class=3D"">linking = kernel.full<br class=3D"">ld: error: undefined symbol: bpf_mtap_if<br = class=3D""><blockquote type=3D"cite" class=3D""><blockquote type=3D"cite" = class=3D""><blockquote type=3D"cite" class=3D"">referenced by if.c:4724 = (/usr/src/sys/net/if.c:4724)<br class=3D""> = &n= bsp;if.o:(if_bpfmtap)<br class=3D"">referenced by if_tuntap.c:1717 = (/usr/src/sys/net/if_tuntap.c:1717)<br class=3D""> = &n= bsp;if_tuntap.o:(tunread)<br class=3D"">referenced by if_vlan.c:1292 = (/usr/src/sys/net/if_vlan.c:1292)<br class=3D""> = &n= bsp;if_vlan.o:(vlan_transmit)<br = class=3D""></blockquote></blockquote></blockquote><br class=3D"">ld: = error: undefined symbol: bpf_mtap2_if<br class=3D""><blockquote = type=3D"cite" class=3D""><blockquote type=3D"cite" class=3D""><blockquote = type=3D"cite" class=3D"">referenced by if_gif.c:323 = (/usr/src/sys/net/if_gif.c:323)<br class=3D""> = &n= bsp;if_gif.o:(gif_transmit)<br class=3D"">referenced by if_tuntap.c:1816 = (/usr/src/sys/net/if_tuntap.c:1816)<br class=3D""> = &n= bsp;if_tuntap.o:(tunwrite)<br = class=3D""></blockquote></blockquote></blockquote>--- kernel.full ---<br = class=3D"">*** [kernel.full] Error code 1<br class=3D""><br = class=3D"">This happens because a dummy bpf_mtap_if() (called a NOP stub = in bpf.c)<br class=3D"">isn't being defined if bpf is not enabled.<br = class=3D""><br class=3D"">--<br class=3D"">Gary Jennejohn<br = class=3D""><br class=3D""></div></div></blockquote></div><br = class=3D""><div class=3D""> <div><br class=3D""></div> </div> <br class=3D""></div></body></html>= --Apple-Mail=_5EEEAFA2-17B5-4EE2-B53F-82B1472F949E--
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