Marko Zec 21ca7b57bd Change the curvnet variable from a global const struct vnet *, ... previously always pointing to the default vnet context, to a dynamically changing thread-local one. The currvnet context should be set on entry to networking code via CURVNET_SET() macros, and reverted to previous state via CURVNET_RESTORE(). Recursions on curvnet are permitted, though strongly discuouraged. This change should have no functional impact on nooptions VIMAGE kernel builds, where CURVNET_* macros expand to whitespace. The curthread->td_vnet (aka curvnet) variable's purpose is to be an indicator of the vnet context in which the current network-related operation takes place, in case we cannot deduce the current vnet context from any other source, such as by looking at mbuf's m->m_pkthdr.rcvif->if_vnet, sockets's so->so_vnet etc. Moreover, so far curvnet has turned out to be an invaluable consistency checking aid: it helps to catch cases when sockets, ifnets or any other vnet-aware structures may have leaked from one vnet to another. The exact placement of the CURVNET_SET() / CURVNET_RESTORE() macros was a result of an empirical iterative process, whith an aim to reduce recursions on CURVNET_SET() to a minimum, while still reducing the scope of CURVNET_SET() to networking only operations - the alternative would be calling CURVNET_SET() on each system call entry. In general, curvnet has to be set in three typicall cases: when processing socket-related requests from userspace or from within the kernel; when processing inbound traffic flowing from device drivers to upper layers of the networking stack, and when executing timer-driven networking functions. This change also introduces a DDB subcommand to show the list of all vnet instances. Approved by: julian (mentor)		2009-05-05 10:56:12 +00:00
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bootp_subr.c	For all files including net/vnet.h directly include opt_route.h and	2009-02-27 14:12:05 +00:00
krpc_subr.c
krpc.h
nfs_bio.c	Add DTrace probes to the NFS access and attribute caches. Access cache	2009-03-24 17:14:34 +00:00
nfs_diskless.c	For all files including net/vnet.h directly include opt_route.h and	2009-02-27 14:12:05 +00:00
nfs_kdtrace.c	Fix typo in comment.	2009-05-04 02:06:39 +00:00
nfs_kdtrace.h	Fix two bugs in DTrace tracing of accesscache and attrcache load events:	2009-03-24 23:16:48 +00:00
nfs_krpc.c	Remove redundant NFSMNT_NFSV3 check in DTrace hooks for NFS RPC.	2009-05-04 02:19:52 +00:00
nfs_lock.c
nfs_lock.h
nfs_nfsiod.c
nfs_node.c
nfs_socket.c	Remove trailing spaces	2009-04-13 19:54:33 +00:00
nfs_subs.c	When a stale file handle is encountered, purge all cached information about	2009-04-06 21:11:08 +00:00
nfs_vfsops.c
nfs_vnops.c	Change the curvnet variable from a global const struct vnet *,	2009-05-05 10:56:12 +00:00
nfs.h	When a stale file handle is encountered, purge all cached information about	2009-04-06 21:11:08 +00:00
nfsargs.h
nfsdiskless.h
nfsm_subs.h
nfsmount.h
nfsnode.h	Expand the per-node access cache to cache permissions for multiple users.	2009-03-20 21:12:38 +00:00
nfsstats.h
nlminfo.h