Improvements to extent accounting

Extent accounting has been improved to provide fixes for a number of bugs. Improvements have also been made to handle scenarios where there is no disk space, but an rm operation is in action to free up disk space.

fsync issues fixed

A fix was applied to correct an issue that could corrupt the filesystem after a hard link was removed and fsync was called. Another fix was applied to prevent a potential data loss issue that could result through calling fsync after an inode was renamed to match a removed inode and a power outage occurred. .

Infinite loop during an incremental send fixed

A fix was applied to correct an ENOMEM error that resulted from an infinite loop when building path strings during an incremental send. This issue was resolved by applying a patch that checked if an orphanized directory inode rename required delay.

Improvements to transaction handling for hard and symbolic links

Fixes were applied to improve transaction handling for the creation of hard and symbolic links. One of these fixes resolved a memory leak that could occur when creating a hard link.