Red Hat Bugzilla – Bug 483154
Add IOCTL support for EMC Symmetrix control functions to dasd subsystem
Last modified: 2009-02-27 21:24:06 EST
EMC developed a "loadable" ioctl module for kernel level 2.6.16 which loaded into the kernel the functionality required for Symmetrix control I/O to issued. This was accomplished via a CKD specific dasd ioctl.
However, the ioctl dynamic load functions were removed in kernel 2.6.17, so EMC requires the equivalent IOCTL capability in the RHEL5 5.4 kernel.
This IOCTL functionality has already been accepted upstream into the Linux kernel at 2.6.28. Refer to the 2.6.28 git patch at:
In order to fully support Symmetrix CKD devices on RHEL 5.4, we require this upstream patch merged the RHEL 2.6.18 kernel.
The patch will need to be modified from the upstream patch, so EMC will modify the patch and test it on RHEL 5.2 and then make it available via this BZ.
The patch has been built and tested on a RHEL 5.2 system. It was added to the SPEC file for the kernel build.
It has very minor changes as compared to the upstream code. I'll upload the patch for inspection in a few days.
Created attachment 333537 [details]
Add IOCTL support for EMC Symmetrix dasd
*** This bug has been marked as a duplicate of bug 461288 ***