CVS commit: src/sys

["Juergen Hannken-Illjes" <hannken%netbsd.org@localhost>]

Module Name:    src
Committed By:   hannken
Date:           Thu Mar 30 09:16:53 UTC 2017

Modified Files:
        src/sys/kern: vfs_vnode.c
        src/sys/miscfs/genfs: genfs_vnops.c layer_extern.h layer_vfsops.c
            layer_vnops.c
        src/sys/miscfs/nullfs: null_vnops.c
        src/sys/miscfs/overlay: overlay_vnops.c
        src/sys/miscfs/umapfs: umap_vnops.c
        src/sys/sys: param.h vnode.h vnode_impl.h

Log Message:
Locking a layer vnode is racy as it may become reclaimed before
calling the operation on the lower vnode.

Replace vi_lock with a rw_obj and change layered file systems
to share the lock with the lower vnode.

Layered file systems now use genfs_lock()/_unlock/_islocked().

Welcome to 7.99.67


To generate a diff of this commit:
cvs rdiff -u -r1.80 -r1.81 src/sys/kern/vfs_vnode.c
cvs rdiff -u -r1.193 -r1.194 src/sys/miscfs/genfs/genfs_vnops.c
cvs rdiff -u -r1.38 -r1.39 src/sys/miscfs/genfs/layer_extern.h
cvs rdiff -u -r1.47 -r1.48 src/sys/miscfs/genfs/layer_vfsops.c
cvs rdiff -u -r1.60 -r1.61 src/sys/miscfs/genfs/layer_vnops.c
cvs rdiff -u -r1.40 -r1.41 src/sys/miscfs/nullfs/null_vnops.c
cvs rdiff -u -r1.22 -r1.23 src/sys/miscfs/overlay/overlay_vnops.c
cvs rdiff -u -r1.58 -r1.59 src/sys/miscfs/umapfs/umap_vnops.c
cvs rdiff -u -r1.533 -r1.534 src/sys/sys/param.h
cvs rdiff -u -r1.274 -r1.275 src/sys/sys/vnode.h
cvs rdiff -u -r1.12 -r1.13 src/sys/sys/vnode_impl.h

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.