On Mon, 22 Jan 2007 13:07:20 -0800 bugme-daemon@xxxxxxxxxxxxxxxxxxx wrote: > http://bugzilla.kernel.org/show_bug.cgi?id=7864 > > Summary: A MTIOCTOP/MTWEOF within the early warning will cause > the file number to be incorrect > Kernel Version: 2.6.19.2 > Status: NEW > Severity: low > Owner: io_scsi@xxxxxxxxxxxxxxxxxxxx > Submitter: ce_reisinger@xxxxxxxxx > > > Write records to a SCSI tape until a write fails with a ENOSPC (you have reached > early warning. > Now perform a: > struct mtget before, after; > ioctl(fd, MTIOCGET, &before); > struct mtop mtop = { MTWEOF, 1 }; > ioctl(fd, MTIOCTOP, &mtop); > ioctl(fd, MTIOCGET, &after); > > Check the value of mt_fileno in the before and after structures. Notice the > after is 2 greater then the before. > > The problem appears to be in the block of code starting at line 2817 in st.c. > This block is entered because the drive did return a CHECK CONDITION with NO > SENSE and the SENSE_EOM bit set. At lines 2824/5 the fileno is incremented. But > it has already been increased by the number of filemarks requested by the > MTIOCTOP. I believe that the residue count in the sense data should be > subtracted from fileno, not a increment as is done. > Thanks. Could you please send us a tested patch to fix these things, as per http://www.zip.com.au/~akpm/linux/patches/stuff/tpp.txt ? - To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
