Date: Sun, 13 Aug 2023 09:31:58 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 273094] getfsstat can return unexpectedly stale statfs data. Message-ID: <bug-273094-227-fQmSCjqeM4@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-273094-227@https.bugs.freebsd.org/bugzilla/> References: <bug-273094-227@https.bugs.freebsd.org/bugzilla/>
next in thread | previous in thread | raw e-mail | index | archive | help
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D273094 --- Comment #1 from Peter Jeremy <peterj@FreeBSD.org> --- Actually, having more carefully read the sources, statfs(2) doesn't update = the cached values, only calling getfsstat(2) with MNT_WAIT works. I think that= 's even more of a POLA violation because it means that data returned by getfstatfs() can be older than data returned by statfs(). IMO, the logic in kern/vfs_mount.c:__vfs_statfs() should be inverted so tha= t it always calls mp->mnt_op->vfs_statfs(mp, &mp->mnt_stat) and then copies the result to sbp if required, though I'm not sure of the subtleties that may be involved. --=20 You are receiving this mail because: You are the assignee for the bug.=
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?bug-273094-227-fQmSCjqeM4>