linux 3.19 iSCSI issue

[Christian Hesse]

Hello everybody,

beginning with linux 3.19 (Arch Linux x86_64 package version 3.19-1) I see an
iSCSI issue. This works perfectly with linux 3.18.6 and before. The logs tell
the story:

Feb 19 11:26:49 thebe kernel: scsi host6: iSCSI Initiator over TCP/IP
Feb 19 11:26:49 thebe kernel: scsi 6:0:0:0: Direct-Access     QNAP     iSCSI Storage    4.0  PQ: 0 ANSI: 5
Feb 19 11:26:49 thebe kernel: sd 6:0:0:0: [sdb] 1073741824 512-byte logical blocks: (549 GB/512 GiB)
Feb 19 11:26:49 thebe kernel: sd 6:0:0:0: [sdb] Write Protect is off
Feb 19 11:26:49 thebe kernel: sd 6:0:0:0: [sdb] Mode Sense: 2f 00 00 00
Feb 19 11:26:49 thebe kernel: sd 6:0:0:0: [sdb] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
Feb 19 11:26:49 thebe kernel:  sdb: unknown partition table
Feb 19 11:26:49 thebe kernel: sd 6:0:0:0: [sdb] Attached SCSI disk
Feb 19 11:26:49 thebe iscsid[10804]: Connection1:0 to [target: iqn.2004-04.com.qnap:ts-859:iscsi.xxxxxxxxxxxxxx.xxxxxx, portal: xx.xx.xxx.xx,3260] through [iface: default] is operational now
Feb 19 11:26:57 thebe kernel:  sdb: unknown partition table
Feb 19 11:28:20 thebe kernel: EXT4-fs (dm-8): mounting with "discard" option, but the device does not support discard
Feb 19 11:28:20 thebe kernel: EXT4-fs (dm-8): mounted filesystem with ordered data mode. Opts: (null)
Feb 19 11:28:24 thebe kernel: sd 6:0:0:0: [sdb] UNKNOWN Result: hostbyte=0x00 driverbyte=0x08
Feb 19 11:28:24 thebe kernel: sd 6:0:0:0: [sdb] Sense Key : 0x5 [current]
Feb 19 11:28:24 thebe kernel: sd 6:0:0:0: [sdb] ASC=0x24 ASCQ=0x0
Feb 19 11:28:24 thebe kernel: sd 6:0:0:0: [sdb] CDB: 
Feb 19 11:28:24 thebe kernel: cdb[0]=0x2a: 2a 00 34 5b 07 ff 00 2f 88 00
Feb 19 11:28:24 thebe kernel: blk_update_request: critical target error, dev sdb, sector 878381055
Feb 19 11:28:24 thebe kernel: EXT4-fs warning (device dm-8): ext4_end_bio:317: I/O error -121 writing to inode 33196503 (offset 8388608 size 7278592 starting block 108749056)
Feb 19 11:28:24 thebe kernel: Buffer I/O error on device dm-8, logical block 108749056
Feb 19 11:28:24 thebe kernel: Buffer I/O error on device dm-8, logical block 108749057
Feb 19 11:28:24 thebe kernel: Buffer I/O error on device dm-8, logical block 108749058
Feb 19 11:28:24 thebe kernel: Buffer I/O error on device dm-8, logical block 108749059
Feb 19 11:28:24 thebe kernel: Buffer I/O error on device dm-8, logical block 108749060
Feb 19 11:28:24 thebe kernel: Buffer I/O error on device dm-8, logical block 108749061
Feb 19 11:28:24 thebe kernel: Buffer I/O error on device dm-8, logical block 108749062
Feb 19 11:28:24 thebe kernel: Buffer I/O error on device dm-8, logical block 108749063
Feb 19 11:28:24 thebe kernel: Buffer I/O error on device dm-8, logical block 108749064
Feb 19 11:28:24 thebe kernel: Buffer I/O error on device dm-8, logical block 108749065
Feb 19 11:28:24 thebe kernel: EXT4-fs warning (device dm-8): ext4_end_bio:317: I/O error -121 writing to inode 33196503 (offset 8388608 size 7278592 starting block 108749312)
Feb 19 11:28:24 thebe kernel: EXT4-fs warning (device dm-8): ext4_end_bio:317: I/O error -121 writing to inode 33196503 (offset 8388608 size 7278592 starting block 108749568)
Feb 19 11:28:24 thebe kernel: EXT4-fs warning (device dm-8): ext4_end_bio:317: I/O error -121 writing to inode 33196503 (offset 8388608 size 7278592 starting block 108749824)
Feb 19 11:28:24 thebe kernel: EXT4-fs warning (device dm-8): ext4_end_bio:317: I/O error -121 writing to inode 33196503 (offset 8388608 size 7278592 starting block 108750080)
Feb 19 11:28:24 thebe kernel: EXT4-fs warning (device dm-8): ext4_end_bio:317: I/O error -121 writing to inode 33196503 (offset 8388608 size 7278592 starting block 108750336)
Feb 19 11:29:10 thebe kernel: sd 6:0:0:0: [sdb] UNKNOWN Result: hostbyte=0x00 driverbyte=0x08
Feb 19 11:29:10 thebe kernel: sd 6:0:0:0: [sdb] Sense Key : 0x5 [current]
Feb 19 11:29:10 thebe kernel: sd 6:0:0:0: [sdb] ASC=0x24 ASCQ=0x0
Feb 19 11:29:10 thebe kernel: sd 6:0:0:0: [sdb] CDB: 
Feb 19 11:29:10 thebe kernel: cdb[0]=0x2a: 2a 00 20 44 89 17 00 20 50 00
Feb 19 11:29:10 thebe kernel: blk_update_request: critical target error, dev sdb, sector 541362455
Feb 19 11:29:10 thebe kernel: Buffer I/O error on dev dm-8, logical block 66621731, lost sync page write
Feb 19 11:29:10 thebe kernel: Aborting journal on device dm-8-8.
Feb 19 11:29:10 thebe kernel: EXT4-fs error (device dm-8): ext4_journal_check_start:56: Detected aborted journal
Feb 19 11:29:10 thebe kernel: EXT4-fs (dm-8): Remounting filesystem read-only
Feb 19 11:29:20 thebe kernel: EXT4-fs error (device dm-8): ext4_put_super:780: Couldn't clean up the journal

-- 
main(a){char*c=/*    Best regards,                           */"B?IJj;MEH"
"CX:;",b;for(a/*    Chris           get my mail address:    */=0;b=c[a++];)
putchar(b-1/(/*               gcc -o sig sig.c && ./sig    */b/42*2-3)*42);}

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