Date: Tue, 13 Mar 2018 15:46:02 -0700 From: Dexuan-BSD Cui <dexuan.bsd@gmail.com> To: freebsd-scsi@freebsd.org, freebsd-virtualization@freebsd.org, Scott Long <scott4long@yahoo.com>, scottl@freebsd.org, Warner Losh <imp@freebsd.org>, jhibbits@freebsd.org, avg@freebsd.org, asomers@freebsd.org, cem@freebsd.org, mav@freebsd.org Cc: Dexuan Cui <decui@microsoft.com> Subject: Re: A strange SCSI-disk-detached issue for FreeBSD VM on Hyper-V/Azure Message-ID: <CABkgQk_TrJzKeFu1GHc=w7tSx7KcEmPMPrVPHOrmc633Ha2_mw@mail.gmail.com> In-Reply-To: <CABkgQk-kUSgZ_BvgOOZNkxHr=7gPF5G3qn_be9tzrQ2j_fHSZg@mail.gmail.com> References: <CABkgQk-kUSgZ_BvgOOZNkxHr=7gPF5G3qn_be9tzrQ2j_fHSZg@mail.gmail.com>
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I reported a bug for this issue: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D226583 I'm working on a fix. -- Dexuan On Mon, Jan 29, 2018 at 7:44 PM, Dexuan-BSD Cui <dexuan.bsd@gmail.com> wrot= e: > With the the recent Azure host upgrade, some FreeBSD VMs can't > properly detect HDD-backed disks. > The issue happens to the latest 12-CURRENT too. > > da0 (0:0:0:0=EF=BC=89is also backed by HDD, but somehow is not affected. > da1 (1:0:1:0) it not affected either, only the extra disks, e,g. da2 > (3:0:0:0=EF=BC=89, are affected. > > These are the logs of my VM, which has da0, da1 and da2. These 3 disks > are on 3 different disk controllers. > > > [root@decui-d4-repro ~]# dmesg -c > /dev/null > [root@decui-d4-repro ~]# camcontrol rescan all > Re-scan of bus 0 was successful > Re-scan of bus 1 was successful > Re-scan of bus 2 was successful > Re-scan of bus 3 was successful > Re-scan of bus 4 was successful > Re-scan of bus 5 was successful > > [root@decui-d4-repro ~]# dmesg > (aprobe0:ata0:0:0:0): Disable ATA disks on simulated ATA controller (0x71= 118086) > (aprobe0:ata0:0:1:0): Disable ATA disks on simulated ATA controller (0x71= 118086) > (probe1:(probe0:blkvsc0:0:1:0): Down reving Protocol Version from 4 to 2? > blkvsc0:0:0:0): storvsc inquiry (36) [0 0 4 2 1f ... ] > (probe1:blkvsc0:0:1:0): storvsc inquiry (36) [7f 0 5 2 1f ... ] > (probe0:blkvsc0:0:0:0): storvsc scsi_status =3D 2, srb_status =3D 6 > (probe0:(probe1:blkvsc0:0:0:0): storvsc inquiry (5) [0 0 0 5 0 ... ] > (probe0:blkvsc0:0:1:1): Down reving Protocol Version from 4 to 2? > blkvsc0:0:0:0): storvsc inquiry (6) [0 83 0 1c 1 ... ] > (probe1:blkvsc0:0:1:1): invalid LUN 1 for op: INQUIRY > (probe0:blkvsc0:0:0:1): invalid LUN 1 for op: INQUIRY > (probe0:blkvsc1:0:0:0): Down reving Protocol Version from 4 to 2? > (probe0:blkvsc1:0:0:0): storvsc inquiry (36) [7f 0 5 2 1f ... ] > (probe1:(probe0:blkvsc1:0:1:0): storvsc inquiry (36) [0 0 5 2 1f ... ] > (probe1:blkvsc1:0:0:1): Down reving Protocol Version from 4 to 2? > blkvsc1:0:1:0): storvsc scsi_status =3D 2, srb_status =3D 6 > (probe1:blkvsc1:0:1:0): storvsc inquiry (5) [0 0 0 8 0 ... ] > (probe0:blkvsc1:0:0:1): invalid LUN 1 for op: INQUIRY > (probe1:blkvsc1:0:1:0): storvsc inquiry (6) [0 83 0 30 1 ... ] > (probe0:storvsc2:0:0:0): Down reving Protocol Version from 4 to 2? > (probe1:(probe0:storvsc2:0:1:0): Down reving Protocol Version from 4 to 2= ? > storvsc2:0:0:0): storvsc inquiry (36) [7f 0 5 2 1f ... ] > (probe1:(probe0:storvsc2:0:1:0): storvsc inquiry (36) [7f 0 5 2 1f ... ] > (probe1:storvsc2:0:0:1): Down reving Protocol Version from 4 to 2? > (probe0:storvsc2:0:1:1): Down reving Protocol Version from 4 to 2? > (probe1:storvsc2:0:0:1): invalid LUN 1 for op: INQUIRY > storvsc2:0:1:1): invalid LUN 1 for op: INQUIRY > (probe0:storvsc3:0:0:0): Down reving Protocol Version from 4 to 2? > (probe1:(probe0:storvsc3:0:1:0): Down reving Protocol Version from 4 to 2= ? > storvsc3:0:0:0): storvsc inquiry (36) [0 0 4 2 1f ... ] > (probe1:(probe0:storvsc3:0:1:0): storvsc inquiry (36) [7f 0 5 2 1f ... ] > storvsc3:0:0:0): storvsc scsi_status =3D 2, srb_status =3D 6 > (probe0:(probe1:storvsc3:0:0:0): storvsc inquiry (5) [0 0 0 5 0 ... ] > (probe0:storvsc3:0:1:1): Down reving Protocol Version from 4 to 2? > storvsc3:0:0:0): storvsc inquiry (6) [0 83 0 1c 1 ... ] > (probe1:storvsc3:0:1:1): invalid LUN 1 for op: INQUIRY > GEOM: new disk da2 > (probe0:pass3 at storvsc3 bus 0 scbus5 target 0 lun 0 > storvsc3:0:0:1): invalid LUN 1 for op: INQUIRY > pass3: <Msft Virtual Disk 1.0> Fixed Direct Access SPC-2 SCSI device > pass3: 300.000MB/s transfers > pass3: Command Queueing enabled > pass3 at storvsc3 bus 0 scbus5 target 0 lun 0 > pass3: <Msft Virtual Disk 1.0> detached > (da2:storvsc3:0:0:0): fatal error, could not acquire reference count > (pass3:(da2:storvsc3:0:storvsc3:0:0:0): storvsc inquiry (5) [0 b1 0 3c 0 = ... ] > 0:0): Periph destroyed > da2: Delete methods: <NONE(*),ZERO> > Opened disk da2 -> 6 > g_access(918): provider da2 has error > g_access(918): provider da2 has error > g_access(918): provider da2 has error > g_access(918): provider da2 has error > > > According to the log, first it looks da2 is indeed detected, but then > it's detached immediately: > > pass3: <Msft Virtual Disk 1.0> detached > > The above line comes from xpt_denounce_periph_sbuf(), which is called by: > > cam_periph_invalidate() at cam_periph_invalidate+0xe7/frame 0xfffffe00004= eb7f0 > xpt_async_process_dev() at xpt_async_process_dev+0x162/frame 0xfffffe0000= 4eb840 > xptdevicetraverse() at xptdevicetraverse+0xa3/frame 0xfffffe00004eb890 > xpttargettraverse() at xpttargettraverse+0x6a/frame 0xfffffe00004eb8d0 > xpt_async_process() at xpt_async_process+0x114/frame 0xfffffe00004eb9e0 > xpt_done_process() at xpt_done_process+0x38a/frame 0xfffffe00004eba20 > xpt_done_td() at xpt_done_td+0x136/frame 0xfffffe00004eba70 > fork_exit() at fork_exit+0x84/frame 0xfffffe00004ebab0 > fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe00004ebab > > > I'm trying to figure out why CAM detaches da2 -- it looks something is wr= ong? > > Currently, with the below hack, da2 can be recognized and > reading/writing da2 works fine: > > --- a/sys/cam/cam_periph.c > +++ b/sys/cam/cam_periph.c > @@ -1942,8 +1942,10 @@ cam_periph_error(union ccb *ccb, cam_flags camflag= s, > * Let peripheral drivers know that this > * device has gone away. > */ > +#if 0 > xpt_async(AC_LOST_DEVICE, newpath, NULL); > xpt_free_path(newpath); > +#endif > } > } > > And I'm further debugging. I appreciate any suggestion. > > Thanks! > > -- Dexuan
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