new helper: __legitimize_mnt()

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same as legitimize_mnt(), except that it does *not* drop and regain
rcu_read_lock; return values are
0  =>  grabbed a reference, we are fine
1  =>  failed, just go away
-1 =>  failed, go away and mntput(bastard) when outside of rcu_read_lock

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

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This commit is contained in:

Al Viro 2015-05-08 11:43:53 -04:00

parent 31956502dd

commit 294d71ff2f

2 changed files with 20 additions and 8 deletions

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1

fs/mount.h

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27

fs/namespace.c

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