Konstantin Belousov 724ce55b5b While fixing the looping of a thread while devfs vnode is reclaimed, ... r179247 introduced a possibility of devfs_allocv() returning spurious ENOENT. If the vnode is selected by vnlru daemon for reclamation, then devfs_allocv() can get ENOENT from vget() due to devfs_close() dropping vnode lock around the call to cdevsw d_close method. Use LK_RETRY in the vget() call, and do some part of the devfs_reclaim() work in devfs_allocv(), clearing vp->v_data and de->de_vnode. Retry the allocation of the vnode, now with de->de_vnode == NULL. The check vp->v_data == NULL at the start of devfs_close() cannot be affected by the change, since vnode lock must be held while VI_DOOMED is set, and only dropped after the check. Reported and tested by: Kohji Okuno <okuno.kohji jp panasonic com> Reviewed by: attilio MFC after: 3 weeks		2011-07-13 21:07:41 +00:00
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devfs.h	Format prototypes to follow style(9) more closely.	2010-10-12 15:58:52 +00:00
devfs_devs.c	- Assert that dm_lock is exclusively held in devfs_rules_apply() and	2010-12-15 16:42:44 +00:00
devfs_dir.c	Add reference counting for devfs paths containing user created symbolic	2010-09-27 17:47:09 +00:00
devfs_int.h	Format prototypes to follow style(9) more closely.	2010-10-12 15:58:52 +00:00
devfs_rule.c	- Assert that dm_lock is exclusively held in devfs_rules_apply() and	2010-12-15 16:42:44 +00:00
devfs_vfsops.c	Enable shared lookups and externed shared ops for devfs.	2010-08-06 09:46:53 +00:00
devfs_vnops.c	While fixing the looping of a thread while devfs vnode is reclaimed,	2011-07-13 21:07:41 +00:00