K 10
svn:author
V 3
pjd
K 8
svn:date
V 27
2009-08-17T10:02:31.770242Z
K 7
svn:log
V 518
MFC r196309:

getcwd() (when __getcwd() fails) works by stating current directory, going up
(..), calling readdir and looking for previous directory inode.  In case of
.zfs/ directory this doesn't work, because .zfs/ is hidden by default, so it
won't be visible in readdir output.

Fix this by implementing VPTOCNP for snapshot directories, so __getcwd()
doesn't fail and getcwd() doesn't have to use readdir method.

This fixes /bin/pwd from within .zfs/snapshot/<name>/.

Suggested by:	kib
Approved by:	re (rwatson)

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