Al Viro f8ad850f11 try to get rid of races in hostfs open() ... In case of mode mismatch, do *not* blindly close the descriptor another openers might be using right now. Open the underlying file with currently sufficient mode, then * if current mode has grown so that it's sufficient for us now, just close our new fd * if current mode has grown and our fd is *not* enough to cover it, close and repeat. * otherwise, install our fd if the file hadn't been opened at all or dup2() our fd over the current one (and close our fd). Critical section is protected by mutex; yes, system-wide. All we do under it is a bunch of comparison and maybe an overwriting dup2() on host. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>		2010-08-09 16:48:15 -04:00
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hostfs_kern.c	try to get rid of races in hostfs open()	2010-08-09 16:48:15 -04:00
hostfs_user.c	try to get rid of races in hostfs open()	2010-08-09 16:48:15 -04:00
hostfs.h	try to get rid of races in hostfs open()	2010-08-09 16:48:15 -04:00
Makefile	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00