Date: Thu, 03 Jul 2025 10:57:15 +0200 From: Olivier Certner <olce@freebsd.org> To: freebsd-current@freebsd.org Subject: Re: RFC: checking file systems support UF_HIDDEN, UF_SYSTEM Message-ID: <4214798.O2WMGSuNBG@ravel> In-Reply-To: <aGXx-wdBm2PCJufs@kib.kiev.ua> References: <CAM5tNy5eoY5f-fo9BKc4v34XKXF6%2B6Ae7Zpq=FH7owaSRYSHmw@mail.gmail.com> <CAOtMX2jVdbtGb=%2BCEAbaWF2oiSTD=V=js2HOjQHnpJpCB1i2zw@mail.gmail.com> <aGXx-wdBm2PCJufs@kib.kiev.ua>
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[-- Attachment #1 --] > I suggest adding more _PC_XXX constants and use VOP_PATHCONF() to get the > property of the specific mount point. You might query it on the root > vnode and cache it somewhere. Also this information would become > available to userspace due to pathconf(2). That works and is probably the path of least resistance. An alternative would be to export this information through statfs()/statvfs(), as probably no (sane) filesystem would support these file attributes only in some directories (in other words, this information is per-mount). However, to stay backwards-compatible, that would mean either defining new MNT_* flags or using some spares in 'struct statfs', and translating these into a new report flag for statvfs(). Regards. -- Olivier Certner [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- iQIzBAABCQAdFiEEmNCxHjkosai0LYIujKEwQJceJicFAmhmResACgkQjKEwQJce JielpRAAmHHK59YzIGc6BpV9avCV/ZHVrgkU0mQZ6w9MmOTNU++8reuXgx4x7z5j XUS1zDRpAQUJ9UId2lzmOSwJO8oY4radjO+kCN5uDut7iLDS9ixQa7fekkS+tGaR 9muPIEc27qaoSA4XXJ/tsQXUN6Pn9f8raDRveaMB+2Px9PuaIN08KoF+NlQxEm1a wWhonTxQ/n82+akV9U3E9QpgZmCuTPIoFXM2kd98pH2OCBIBrshX200qpNMraaa0 8L1WhEq1KEYUDzE2iSR8SD8ysGMFoUElI+Ria9fOhIWOv5Gfp1Oa5T2rI9Xxy8C4 WGeJmtzqTU7fI5ErczyY26q3uruG9Udcgt8KtKq4+AncB3lpTNXrxODFvslmX8jC 3/euKeSjWGHDZsIlLG51+skpWwBig3UZQIM8Pw++BD/lxYFWDERMmIFzri3iE27m ZqRz1Q+gwGbRhp23/KuTNcSBRslMX8Afthu8HtkkMFqunh0GpvyUNG6n5Xn+2cHS QDTH5RZttAYmwIpQg+SGADl46apCe9+Fjv3JANRqb9zveD0JD16tYHd/viUPm7vg yKUTIHpBnrH2pnHN7uKo/P+1rSTbkwOl7Jw4RNCFgrz3fxeygv9GOG4wtgLyPb5T phUN6pkeqLnk6jJwAma3jtCzva056SHkMNI8gsxlR/qFNEp3MBQ= =8iWp -----END PGP SIGNATURE-----home | help
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