From owner-freebsd-fs@freebsd.org  Fri May 26 14:19:37 2017
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To: freebsd-fs@freebsd.org, Andriy Gapon <avg@FreeBSD.org>
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From: Lev Serebryakov <lev@FreeBSD.org>
Subject: Strange behavior of .zfs/snapshot/* directories in respect to ".."
 path.
Organization: FreeBSD
Message-ID: <1acc5917-f10f-b18a-50e0-84661173e85d@FreeBSD.org>
Date: Fri, 26 May 2017 17:19:34 +0300
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 I have some filesystem with multiple snapshots. And behavior of "cd .."
in snapshot directories is very strange: when I'm in one of dnapshot
directories "cd ../other" doesn't work and "cd .." brings me to the root
of file system.

$ pwd
/usr/home/lev
$ cd .zfs/snapshot
$ pwd
/usr/home/lev/.zfs/snapshot
$ ls | tail -2
weekly-2017-05-06_05.17.18--1y
weekly-2017-05-13_04.18.37--1y
$ cd weekly-2017-05-06_05.17.18--1y
$ pwd
/usr/home/lev/.zfs/snapshot/weekly-2017-05-06_05.17.18--1y
$ cd ../weekly-2017-05-13_04.18.37--1y
../weekly-2017-05-13_04.18.37--1y: No such file or directory.
$ pwd
/usr/home/lev/.zfs/snapshot/weekly-2017-05-06_05.17.18--1y
$ cd ..
$ pwd
/usr/home/lev
$ uname -i -K -v
FreeBSD 11.1-PRERELEASE #16 r318576: Sat May 20 22:30:06 MSK 2017
root@blob.home.serebryakov.spb.ru:/usr/obj/usr/src/sys/BLOB  BLOB 1100513
$

 Is it Ok?

-- 
// Lev Serebryakov