[dm-devel] [PATCH][RESEND+fixes] dm + sysfs

[Mike Christie]

Hello Joe,

This is a resend of my dm+sysfs patch, except I moved everything 
(mapped_device, dm_table and dm_table's dm_dev list) back to where they 
belong and added better code to test for and clean up from sysfs/kobject 
failures.

I also unified the ref counting for the structs represented in sysfs. If 
someone does "dmsetup remove mydev" but has a dm sysfs file open, the 
memory for mydev should not be released until the file is closed. For 
structs like mapped_device and dm_table I removed the atomic_t holders 
variable and am just using the kobject ref count.

The patch was built and tested against 2.6.0-test9. I have also only 
tested against the v4 ioctl.

Mike Christie
mikenc at us.ibm.com
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