make sure that mntns_install() doesn't end up with referral for root

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new flag: LOOKUP_DOWN.  If the starting point is overmounted, cross
into whatever's mounted on top, triggering referrals et.al.

Use that instead of follow_down_one() loop in mntns_install(), handle
errors properly.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

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This commit is contained in:

Al Viro 2017-04-15 17:31:22 -04:00

parent 93893862fb

commit 4f757f3cbf

3 changed files with 50 additions and 7 deletions

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38

fs/namei.c

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18

fs/namespace.c

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1

include/linux/namei.h

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