Date: Wed, 30 Aug 2023 11:57:33 +0300 From: Dmitry Chagin <dchagin@freebsd.org> To: current@freebsd.org Subject: Re: Possible issue with linux xattr support? Message-ID: <ZO8EfRnfbF4ixn_L@heemeyer.club> In-Reply-To: <g5lcvxsnjppbfchdtiufwxcbx7au2dbv2wkxwf5pqp66mo547b@vouujjivkgox> References: <ZOuoH6Llw8PKgMJQ@heemeyer.club> <wuwg3egv3rilgfaa5hor47v3yjwzvxlt5krj4la4wvugcnhkg3@vgrtgfr7rc6i> <EA27BAE1-C687-47F9-BB6D-B72A85A5CA8D@cschubert.com> <elx6cvceobzgw66fskkfhhicsdpsur5xaktluu5tk7m7p4qwno@s7qmm4kyuvag> <ZOzD9noXVrslppot@heemeyer.club> <smfbmu35sxh2f3hu5nrpdwb355trlucd2bbp4ag5ke7v3zf3il@s3ua2x4i3nzj> <ZO4En1UJqcr4GGiw@heemeyer.club> <uvavvxn7vgjhf5fswoxcawuolvviq2idedxyt4fe6vtjlewsex@aqssespkdh4e> <ZO409dM4Ws7x_yuM@heemeyer.club> <g5lcvxsnjppbfchdtiufwxcbx7au2dbv2wkxwf5pqp66mo547b@vouujjivkgox>
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On Tue, Aug 29, 2023 at 08:58:13PM +0200, Felix Palmen wrote: > * Dmitry Chagin <dchagin@freebsd.org> [20230829 21:12]: > > On Tue, Aug 29, 2023 at 07:02:22PM +0200, Felix Palmen wrote: > > > So, using user.* works, using system.* doesn't, and maybe a bit > > > surprising(?), dumping all attributes which by default excludes the > > > system namespace doesn't work either. > > > > > > > As expected, the second patch intended to allow access to system > > namespace in jailed env. > > Not exactly, according to the manual, 'getfattr -d' *excludes* the > system namespace by default, so I would have expected it to work. But > maybe that's an issue with the getfattr tool itself. > > > > I still wonder, is the first patch needed anyways? Maybe I fail to > > > understand something here. Won't it map *every* EPERM to ENOSUP and > > > can't this be an issue? > > > > > > > fine, thanks. Gnu tools running under unprivileged user will fail, eg > > ls, which uses getfattr() to get the posix acl > > Ah, I see, that would still break "Linux jails" then... > > Thanks again for quickly fixing this! Can this still make 14.0-RELEASE? > I think yes, thanks for testing, I revised the error handling and made it more precise, can you test new patch in your environment. https://people.freebsd.org/~dchagin/xattr.patch Revert previous patches
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