K 10
svn:author
V 3
avg
K 8
svn:date
V 27
2017-09-12T06:04:01.008776Z
K 7
svn:log
V 407
zfs_get_vfs: reference a requested filesystem instead of vfs_busy-ing it

The only consumer of zfs_get_vfs, zfs_unmount_snap, does not need
the filesystem to be busy, it just need a reference that it can pass
to dounmount.

Also, previously the code was racy as it unbusied the filesystem
before taking a reference on it.

Now the code should be simpler and safer.

MFC after:	2 weeks
Sponsored by:	Panzura

END