From f5162216b7dab0c07e070b8b7f98891a85047f59 Mon Sep 17 00:00:00 2001 From: Ian Kent Date: Thu, 3 Jan 2019 15:27:43 -0800 Subject: autofs: add strictexpire mount option Commit 092a53452bb7 ("autofs: take more care to not update last_used on path walk") helped to (partially) resolve a problem where automounts were not expiring due to aggressive accesses from user space. This patch was later reverted because, for very large environments, it meant more mount requests from clients and when there are a lot of clients this caused a fairly significant increase in server load. But there is a need for both types of expire check, depending on use case, so add a mount option to allow for strict update of last use of autofs dentrys (which just means not updating the last use on path walk access). Link: http://lkml.kernel.org/r/154296973880.9889.14085372741514507967.stgit@pluto-themaw-net Signed-off-by: Ian Kent Cc: Al Viro Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/autofs/autofs_i.h | 1 + 1 file changed, 1 insertion(+) (limited to 'fs/autofs/autofs_i.h') diff --git a/fs/autofs/autofs_i.h b/fs/autofs/autofs_i.h index 9b81c10ef251..3e59f0ed777b 100644 --- a/fs/autofs/autofs_i.h +++ b/fs/autofs/autofs_i.h @@ -104,6 +104,7 @@ struct autofs_wait_queue { #define AUTOFS_SBI_MAGIC 0x6d4a556d #define AUTOFS_SBI_CATATONIC 0x0001 +#define AUTOFS_SBI_STRICTEXPIRE 0x0002 struct autofs_sb_info { u32 magic; -- cgit v1.2.3