8fe453b671
Issues: Under Linux, when executing zfs_destroy_004.ksh destroy $fs is an error. The key issue here is that illumos kernel treats this case differently than the Linux kernel. On illumos you can unmount and destroy a filesystem which is busy and all consumers of it get EIO. On Linux the expected behavior is to prevent the unmount and destroy. Cause analysis: When create $fs file system and mount file system to $mntp. cd $mntp, linux isn't allow to destroy $fs in this mount contents. No matter what destroy with parameters. Solution: So log_mustnot $ZFS destroy $fs is ok. cd $olddir and destroy $fs. Signed-off-by: caoxuewen cao.xuewen@zte.com.cn Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #5012