Date: Sat, 1 May 2021 09:29:30 -0400 From: Mark Johnston <markj@freebsd.org> To: =?utf-8?B?SW9udcib?= Mihalache <ionut.mihalache1506@gmail.com> Cc: freebsd-hackers@freebsd.org Subject: Re: cap_sysctlbyname for hw.vmm.destroy Message-ID: <YI1XujxIQv1fpfpV@nuc> In-Reply-To: <CAOxbktYgis0tq2yTp-7bwZCH01M0UDXhsgL%2Bf%2BEJtJX8BcxWyA@mail.gmail.com> References: <CAOxbktY6GZY2rfyYMoTquyn04rM2GB5S2opAF1gDxh2177frLg@mail.gmail.com> <YIb66AlmFG0DPn%2BG@nuc> <CAOxbktbsOGAEHZHEuHNrzP9ToyJVN0MvhqfRX_M-kxNOChD2Gw@mail.gmail.com> <YIlot3y9aJ5cSB9H@nuc> <CAOxbktYCDEotQE%2BE3SHAkw_FCBui80xoAoWBbau9APb1M5=d6w@mail.gmail.com> <YIl0L5Wrm8YwpXWr@nuc> <CAOxbktazHmPtHjkkD6Hh7=1O5KW5N%2Bcu-5=WfC6GmKPut4K7yQ@mail.gmail.com> <YImCHsL3lVN3HAWo@nuc> <CAOxbktYgis0tq2yTp-7bwZCH01M0UDXhsgL%2Bf%2BEJtJX8BcxWyA@mail.gmail.com>
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On Sat, May 01, 2021 at 12:29:26PM +0300, Ionuț Mihalache wrote: > I did a clean buildworld with -DWITH_CASPER and -DHAVE_CASPER and now there > is a linking problem. Here [1] I have the includes to test the example and > here [2] I have the code. When trying to link there is a problem with > cap_sysctl_limit_init, > cap_sysctl_limit_name, cap_sysctl_limit, cap_sysctlbyname; the symbols are > not found. If I comment those lines though, cap_service_open fails(this > happens in bhyverun.c). When using the API here [3] there are no linking > problems and cap_service_open works, but cap_sysctlbyname returns EPERM(I > have here [4] the includes that I used). - You do not need to do a full buildworld. It is sufficient to rebuild bhyve itself with -DWITH_CASPER. Note that the bhyve Makefile does not define WITH_CASPER when snapshot support is enabled. - You need to add cap_sysctl to the list of libraries linked into bhyve, same as it currently links cap_pwd and cap_grp. > [1] - > https://github.com/FreeBSD-UPB/freebsd-src/blob/2373ecaa6dea4f0491a3ccc679017c025cbaf243/usr.sbin/bhyve/bhyverun.c#L36 > [2] - > https://github.com/FreeBSD-UPB/freebsd-src/blob/2373ecaa6dea4f0491a3ccc679017c025cbaf243/usr.sbin/bhyve/bhyverun.c#L1569 > [3] - > https://github.com/FreeBSD-UPB/freebsd-src/blob/2373ecaa6dea4f0491a3ccc679017c025cbaf243/lib/libvmmapi/vmmapi.c#L141 > [4] - > https://github.com/FreeBSD-UPB/freebsd-src/blob/2373ecaa6dea4f0491a3ccc679017c025cbaf243/lib/libvmmapi/vmmapi.h#L38
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