Date: Mon, 29 Jan 2018 19:44:35 -0800 From: Dexuan-BSD Cui <dexuan.bsd@gmail.com> To: freebsd-scsi@freebsd.org, freebsd-virtualization@freebsd.org, scott4long@yahoo.com, scottl@freebsd.org, imp@freebsd.org, jhibbits@freebsd.org, avg@freebsd.org, asomers@freebsd.org, cem@freebsd.org, mav@freebsd.org Cc: decui@microsoft.com Subject: A strange SCSI-disk-detached issue for FreeBSD VM on Hyper-V/Azure Message-ID: <CABkgQk-kUSgZ_BvgOOZNkxHr=7gPF5G3qn_be9tzrQ2j_fHSZg@mail.gmail.com>
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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 (0x7111= 8086) (aprobe0:ata0:0:1:0): Disable ATA disks on simulated ATA controller (0x7111= 8086) (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 0xfffffe00004eb= 7f0 xpt_async_process_dev() at xpt_async_process_dev+0x162/frame 0xfffffe00004e= b840 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 wron= g? 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 camflags, * 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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