Jason A. Harmening 93fe61afde unionfs_mkdir(): handle dvp reclamation ... The underlying VOP_MKDIR() implementation may temporarily drop the parent directory vnode's lock. If the vnode is reclaimed during that window, the unionfs vnode will effectively become unlocked because the its v_vnlock field will be reset. To uphold the locking requirements of VOP_MKDIR() and to avoid triggering various VFS assertions, explicitly re-lock the unionfs vnode before returning in this case. Note that there are almost certainly other cases in which we'll similarly need to handle vnode relocking by the underlying FS; this is the only one that's caused problems in stress testing so far. A more general solution, such as that employed for nullfs in null_bypass(), will likely need to be implemented. Tested by: pho Reviewed by: kib, markj Differential Revision: https://reviews.freebsd.org/D39272		2023-04-17 20:31:40 -05:00
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union.h	Remove unnecessary thread argument from unionfs_nodeget() and _noderem()	2021-12-07 16:20:02 -08:00
union_subr.c	vn_lock_pair(): allow to request shared locking	2023-04-08 01:58:26 +03:00
union_vfsops.c	unionfs: allow recursion on covered vnode lock during mount/unmount	2022-12-10 22:02:38 -06:00
union_vnops.c	unionfs_mkdir(): handle dvp reclamation	2023-04-17 20:31:40 -05:00