Hi folks, The following 2 patches implement the BMBT owner change transaction that is necessary to enable the XFS_IOC_SWAPEXT ioctl to operate on v5 filesystems correctly. The first patch implements the transactional runtime change, and the second patch implements the recovery of that change. Both the run time and recovery code use the same mechanism for changing the owner field in all the blocks in the BMBT on an inode, and even though XFS_IOC_SWAPEXT only swaps the data fork, the code has been written to be fork neutral so if we even need to swap attribute forks it should just work for that, too. Further, because the BMBT code uses the generic btree infrastructure, the btree modification is done as a generic function as well and so should work for all types of btrees supported by the generic code. Hence if the need arises we can easily change the owner of any btree that uses the generic code. The testing carried out is documented in the description of the second patch. AFAIA, this is the only remaining feature that the kernel v5 filesystem implementation didn't support. Hence, with this patchset, there are no more feature checkboxes that need to be ticked that would prevent us from removing the experimental tag from it. Testing is the only remaining gate to removing the tag from the kernel code... Cheers, Dave. _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
