December 2004 - Packet Writing - openSUSE Mailing Lists

Re: Reading DVD w/ pktcdvd module loaded causes 4GB access errors
by john 31 Dec '04

31 Dec '04

Hello, I've been puzzling about why I was getting CDROM read errors; now I realize what is going on. If you execute the pktsetup program with no disk in the drive, it marks the block device as "open", and some code in the file system layer (in block_dev.c) tries to discover the capacity of the drive. With no disk in the drive, this defaults to 1FFFFF blocks (this is hardcoded in ide-cd.c). If you then mount a disk and try to read it, the code in block_dev.c does not reset the disk capacity because it has got the device marked as "already open". The following patch to block_dev.c fixes this behaviour by resetting the disk size every time the device is opened. I'm sure this is the wrong way to fix it, but it works for me as a quick-and-dirty workaround. BTW this is a patch to 2.6.10 but I can't see why it shouldn't work with 2.6.8. --- linux/fs/block_dev.c.orig 2004-12-25 08:26:10.000000000 +0000 +++ linux/fs/block_dev.c 2004-12-31 17:24:12.000000000 +0000 @@ -630,6 +630,7 @@ if (ret) goto out; } + bd_set_size(bdev,(loff_t)get_capacity(disk)<<9); if (bdev->bd_invalidated) rescan_partitions(bdev->bd_disk, bdev); } else { Regards, John

1 0

Linux-2.6.0
by Richard A Downing FBCS 30 Dec '04

30 Dec '04

I was about to update my kernel to the new stable 2.6.0, but notice Jens has added some changes since test11. Is there any reason to suppost the test11 patch wouldn't work? I guess this is just a way of saying 'Can we have a 2.6.0 patch please Peter?' -- Richard A Downing FBCS http://www.freewebs.com/109bean/ Anyone sending unwanted advertising e-mail to this address will be charged $25 for network traffic and computing time. By extracting my address from this message or its header, you agree to these terms.

5 6

ioctl: Inappropriate ioctl for device
by Paul Smith 15 Dec '04

15 Dec '04

Dear All I have just installed udftools on my computer running Mandrake 10.1 (kernel: 2.6.8.1-12mdk). The command cdrwtool -d /dev/cdrom -q ran successfully. However, afterwards, when I run pktsetup /dev/pktcdvd0 /dev/cdrom I get the following: ioctl: Inappropriate ioctl for device Any ideas? Thanks in advance, Paul

4 13

Udftools are problematic with accented names of directories
by Paul Smith 14 Dec '04

14 Dec '04

Dear All This is just to report to the developers present on this list that udftools have problems when a directory is copied into a cd and the name of this directory has accents. I hope this helps. Regards, Paul

2 2

Writing light is a long time on
by Paul Smith 14 Dec '04

14 Dec '04

Dear All The writing light is a long time on, but if I access to the cd for reading, the writing light turns off stationarily. It seems that the read access to the cd "reminds" udftools to turn off the writing or the writing light. Can this damage the cd recorder? Thanks in advance, Paul

1 0

Is current pktcdvd suppossed to work under 2.4.[0-2][0-9] (no devfs)?
by zoltan 14 Dec '04

14 Dec '04

I'm running 2.4.22, and have gotten everything that I could get my hands on patched and installed, yet I think I'm missing out on something... Specifically, I think I'm missing the character device driver (the replacement for the ioctl() based communication from pktcdvd to the /dev/scdX, I think...) 1) I have patched the kernel with the appropriate patch for 2.4.22. BTW, something's fishy in that /proc/misc never reports the character driver for which the pktcdvd seekests... 2) I have patched udftools-1.0.03b with its patch. 3) I've got writable udf compiled as a module and modprobe'd. Everything's happy, execpt: # pktsetup -s Can't find pktcdvd character device ctl open: Not a directory Given this, and that pktsetup is >= 0.2.0, I'm wondering if its even intended to work under 2.4.22 (without devfs)? I 'm a developer of sorts, though pkt drivers are a bit new to me, device drivers are not. If someone can point me in the write [sic :-) ] direction, maybe I can code something up if its just a matter of porting from devfs to standard character device driver. Thanks, zoltan

1 0

Re: ioctl: Inappropriate ioctl for device
by Georg Chini 13 Dec '04

13 Dec '04

Hello, Chris Clayton wrote: > On Monday 13 Dec 2004 18:48, Paul Smith wrote: > >> On Mon, 13 Dec 2004 18:39:02 +0000, Chris Clayton >> >> <chris_clayton(a)f1internet.com> wrote: >> >>>>>> >>>>>> [root@localhost psmith]# mount /dev/pktcdvd/whatevername -o udf Shouldn't it be mount -t udf ... instead of mount -o udf ...? Regards Georg Chini

1 0

Reading DVD w/ pktcdvd module loaded causes 4GB access errors
by Johnny Casey 05 Dec '04

05 Dec '04

I am using Debian unstable with a custom kernel. The kernel is patched with "packet-2.6.8-2.patch.bz2" and (unrelated, user-mode-linux) "host-skas3-2.6.9-v7.patch". Using growisofs via the raw device to create a 4.4 GB iso9660 DVD+R works fine. However, reading the files back causes kernel messages like the following to appear. attempt to access beyond end of device hdc: rw=0, want=8676824, limit=8388604 Buffer I/O error on device hdc, logical block 2169205 This causes an error to appear on reading the last few files. rmmod'ing pktcdvd and remounting the disk allows all of the files to be read. The DVD is burned as a single directory with several files in it. I am using the raw device to mount the DVD and the DVD is closed, so I would have no use further burn it. Unfortunately the other DVD-ROM drive in the system (a Toshiba SD-M1402) can't read the DVD+R so I currently don't know if that drive is affected one way or the other. The number 8388604 == (2^23) - 4 looks suspicious. Cheers, Johnny

1 0