Want to disable usb-storage [solved]

[shrinidhi666]

Hi guys. I am trying to disable the usb-storage module in my workplace . I deleted /lib/modules/2.6.34-gentoo-r1/kernel/drivers/usb/storage/usb-storage.ko . When the system is rebooted it can still mount any usb storage device .After i do a "rmmod usb-storage" i am not able to do a "modprobe usb-storage" and says that "/lib/modules/2.6.34-gentoo-r1/kernel/drivers/usb/storage/usb-storage.ko file is not found".

blue0005: /root # rmmod usb-storage
blue0005: /root # modprobe usb-storage
FATAL: Could not open '/lib/modules/2.6.34-gentoo-r1/kernel/drivers/usb/storage/usb-storage.ko': No such file or directory


Am i missing something here .

[gerard27]

shrinidhi666,
If I understand your post correctly you deleted the module.
No system can load anything that's been deleted.
Gerard.
_________________
To install Gentoo I use sysrescuecd.Based on Gentoo,has firefox to browse Gentoo docs and mc to browse (and edit) files.
The same disk can be used for 32 and 64 bit installs.
You can follow the Handbook verbatim.
http://www.sysresccd.org/Download

[idella4]

shrinidhi666,

let me get this straight. You deleted /lib/modules/2.6.34-gentoo-r1/kernel/drivers/usb/storage/usb-storage.ko, and you're wondering why you can't now modprobe usb_storage. At a guesrr, it's because you deleted it!! ? I have no idea why you would want to modprobe a module you selected to delete.

If the usb storage is still mounted, track the module remaining that facilitates it. I'm no usb guru, but post

cat /etc/mtab and or mount
& lspci -k [or -v]

You can elect to blacklist the loading of a module, as opposed to outright deleting it.
_________________
idella4@aus

[shrinidhi666]

Thats the whole problem

blue0005: /root # lsmod | grep -i storage
usb_storage 41830 0
usbcore 134346 7 sl811_hcd,usbhid,ohci_hcd,uhci_hcd,usb_storage,ehci_hcd

blue0005: /root # tree -aif /lib/ | grep -i "usb-storage"
blue0005: /root #

I dont want to it load . but it does after a restart . Users can use Usb drives which I dont want them to use .

idella4, I have put it in the black list too with no luck . .

[idella4]

shrinidhi666;

ok, you missed the part about cat /etc/mtab and or mount
& lspci -k [or -v]

That's intended to inform what modules your system provides to support the usbfs.
Identify them, go to your kernel and de-select them, and recompile the kernel that can't mount usb.
If unsure, go to the kernel most upper level directory, post grep USB .config
for further support.
_________________
idella4@aus

[shrinidhi666]

[shrinidhi666]

Hey guys . Damn it . i figured it out !! . the usb_storage module is automatically loaded through initramfs generated by genkernel . and the initramfs has a copy of that module . So its useless even if i delete it from the modules direcotry in /lib/ . I dont want to disable it from the kernel since i need the power to use it when i want it . Any suggestions? . how can i prevent it from loading from the initramfs ?

[wjb]

How about adding usb-storage to /etc/modprobe.d/blacklist.conf?

Something done with udev might be more flexible. You should be able to set something up so that only members of a certain group can use memory sticks.

Doesn't really help though if your users can boot off a live cd and remove the restrictions.

[shrinidhi666]

wjb . I added it to the black list . nothing works since its loaded through initramfs . But now i figured it out.
Here is what i did
# open /usr/share/genkernel/defaults/linuxrc
# add the following line
rmmod usb-storage

# just before this line
exec /sbin/switch_root .....

Run "genkernel all" once u r done .
Now i can disable usb-storage by deleting or renaming the
/lib/modules/(uname -r)/kernel/drivers/usb/storage/usb-storage.ko
and restart .

And with this i get full control on which host can recongnize usb drives

And regarding live cds. I dont have to worry coz there is no cdrom or dvdrom drives in any hosts

thanks for all the help