Date: Fri, 5 Jul 2013 11:47:48 -0400 From: George Neville-Neil <gnn@freebsd.org> To: Kevin Oberman <rkoberman@gmail.com> Cc: Attilio Rao <attilio@freebsd.org>, fs@freebsd.org Subject: Re: New fusefs implementation not usable with multiple fusefs mounts Message-ID: <4EF944D8-0D08-433D-BFD7-917631E3264E@freebsd.org> In-Reply-To: <CAN6yY1vypnD-r16P7%2B%2BmH==sVGhs%2BYbNSSxZ8dGUZnpJ7KRCsQ@mail.gmail.com> References: <CAN6yY1sMxAwq1DR4RW-=d2JwHUsJPJuMj3R5CmTPb9Sogj6pPQ@mail.gmail.com> <CAJ-FndDKse=v-KFGAkgy4X_F7VoYYvnpqj%2BReduiXE3QT=r3Qg@mail.gmail.com> <CAN6yY1vypnD-r16P7%2B%2BmH==sVGhs%2BYbNSSxZ8dGUZnpJ7KRCsQ@mail.gmail.com>
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On Jul 2, 2013, at 18:46 , Kevin Oberman <rkoberman@gmail.com> wrote: > On Tue, Jul 2, 2013 at 3:20 PM, Attilio Rao <attilio@freebsd.org> wrote: > On Wed, Jul 3, 2013 at 12:07 AM, Kevin Oberman <rkoberman@gmail.com> wrote: > > I have been using the new fusefs for a while and have had to back it out and > > go back to the old kernel module. I keep getting corrupted file NTFS systems > > and I think I understand why, > > > > I mount two NTFS systems: > > /dev/fuse 184319948 110625056 73694892 60% /media/Media > > /dev/fuse 110636028 104943584 5692444 95% /media/Windows7_OS > > > > Note that both systems are mounted on /dev/fuse and I am assured that this > > is by design. Both work fine for reads and seem to work for writes. Then I > > unmount either of them. Both are unmounted, at least as far as the OS is > > concerned. There is no way to unmount one and leave the other mounted. It > > appears that any attempt to unmount either system does a proper unmount of > > /media/Media, but, while marking /media/Windows7_OS as unmounted, actually > > does not do so. The device ends up corrupt and the only way I have been able > > to clean it is to boot Windows and have a disk check run. Media never seems > > to get corrupted. > > > > Any further information I might gather before filing a PR? I am running on > > 9.1 stable, but havehad the problem since the patch set first became > > available on 9.0-stable. > > I do not understand, new fusefs implementation was never committed to > stable branch to my knowledge. > Did you backport manually? > > BTW I cc'ed George which should maintain the module. > > Attilio > > Attilio, > > Actually, you provided the patches for 9-Stable way back when you first did them and we had an exchange on current@ about their use on 9-stable and their operation including the mounts all being on /dev/fuse. I also edited the mount_fuse man pages to clarify the awkward wording of the original (which you didn't write). > > They still apply pretty cleanly and I continued using them until about 3 weeks ago when I removed them to test whether they were responsible for the issues I was seeing. Since I got corruption most every time I unmounted the file systems after having written to the Windows one, I am now pretty sure that it does not happen when I use the old kernel module. > > The analysis of the problem is purely speculation, but fits the behavior. If it is correct, I would expect the same issues to occur with head. > > Thanks for copying George. I didn't realize that he had taken over the code. I won't bu you about it again. Actually I too have no time for this code as other things have come up. It's time to find someone who really needs this on a long term basis. Best, George
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