Messages in this thread | | | Date | Mon, 12 Dec 2005 13:49:04 -0800 | From | Pete Zaitcev <> | Subject | "block" symlink in sysfs for a multifunction device |
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Hi, Greg,
When I plug a USB card reader with multiply LUNs, the following happens:
[zaitcev@niphredil ~]$ ls -l /sys/devices/pci0000:00/0000:00:07.2/usb1/1-2/1-2:1.0 total 0 -r--r--r-- 1 root root 4096 Dec 12 12:47 bAlternateSetting -r--r--r-- 1 root root 4096 Dec 12 12:46 bInterfaceClass -r--r--r-- 1 root root 4096 Dec 12 12:46 bInterfaceNumber -r--r--r-- 1 root root 4096 Dec 12 12:46 bInterfaceProtocol -r--r--r-- 1 root root 4096 Dec 12 12:46 bInterfaceSubClass lrwxrwxrwx 1 root root 0 Dec 12 12:47 block -> ../../../../../../block/ubd lrwxrwxrwx 1 root root 0 Dec 12 12:47 block -> ../../../../../../block/ubd lrwxrwxrwx 1 root root 0 Dec 12 12:47 block -> ../../../../../../block/ubd lrwxrwxrwx 1 root root 0 Dec 12 12:47 block -> ../../../../../../block/ubd -r--r--r-- 1 root root 4096 Dec 12 12:46 bNumEndpoints lrwxrwxrwx 1 root root 0 Dec 12 12:46 bus -> ../../../../../../bus/usb -r--r--r-- 1 root root 4096 Dec 12 12:47 diag lrwxrwxrwx 1 root root 0 Dec 12 12:46 driver -> ../../../../../../bus/usb/drivers/ub -r--r--r-- 1 root root 4096 Dec 12 12:46 modalias drwxr-xr-x 2 root root 0 Dec 12 12:46 power [zaitcev@niphredil ~]$ cat /proc/version Linux version 2.6.14-nip (zaitcev@niphredil) (gcc version 4.0.2 20051109 (Red Hat 4.0.2-6)) #5 Tue Dec 6 23:10:53 PST 2005 [zaitcev@niphredil ~]$
The usb-storage produces this:
[root@niphredil linux-2.6.14-nip]# find /sys -name block /sys/block /sys/devices/pci0000:00/0000:00:07.2/usb1/1-2/1-2:1.0/host0/target0:0:0/0:0:0:3/block /sys/devices/pci0000:00/0000:00:07.2/usb1/1-2/1-2:1.0/host0/target0:0:0/0:0:0:2/block /sys/devices/pci0000:00/0000:00:07.2/usb1/1-2/1-2:1.0/host0/target0:0:0/0:0:0:1/block /sys/devices/pci0000:00/0000:00:07.2/usb1/1-2/1-2:1.0/host0/target0:0:0/0:0:0:0/block /sys/devices/pci0000:00/0000:00:07.1/ide0/0.0/block [root@niphredil linux-2.6.14-nip]# ls -l /sys/devices/pci0000:00/0000:00:07.2/usb1/1-2/1-2:1.0/host0/target0:0:0/0:0:0:0/block lrwxrwxrwx 1 root root 0 Dec 12 13:44 /sys/devices/pci0000:00/0000:00:07.2/usb1/1-2/1-2:1.0/host0/target0:0:0/0:0:0:0/block -> ../../../../../../../../../block/sda [root@niphredil linux-2.6.14-nip]#
Each "block" is in its own subdirectory.
Do you have a suggestion about the fastest way to accomplish the same effect with ub?
Thank you, -- Pete - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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