hannken 2b6ec89863 The current implementation of vn_lock() is racy. Modification of ... the vnode operations vector for active vnodes is unsafe because it is not known whether deadfs or the original file system will be called. - Pass down LK_RETRY to the lock operation (hint for deadfs only). - Change deadfs lock operation to return ENOENT if LK_RETRY is unset. - Change all other lock operations to check for dead vnode once the vnode is locked and unlock and return ENOENT in this case. With these changes in place vnode lock operations will never succeed after vclean() has marked the vnode as VI_XLOCK and before vclean() has changed the operations vector. Adresses PR kern/37706 (Forced unmount of file systems is unsafe) Discussed on tech-kern. Welcome to 6.99.33		2014-02-27 16:51:37 +00:00
..
files.nfs
krpc_subr.c
krpc.h
Makefile
nfs_bio.c	Function nfs_vinvalbuf() ignores errors from vinvalbuf() and therefore	2013-08-12 17:46:38 +00:00
nfs_boot.c	Mark a potentially unused variable	2013-10-25 20:46:29 +00:00
nfs_bootdhcp.c
nfs_bootparam.c	tyop in comment, from Eivind Evensen via OpenBSD	2013-09-12 18:00:18 +00:00
nfs_bootstatic.c
nfs_clntsocket.c
nfs_clntsubs.c
nfs_export.c	don't allow the nfs server module to unload if it has exported filesystems.	2013-12-14 16:19:28 +00:00
nfs_iod.c	Mark a diagnostic-only variable	2013-10-25 16:01:56 +00:00
nfs_kq.c
nfs_node.c	The current implementation of vn_lock() is racy. Modification of	2014-02-27 16:51:37 +00:00
nfs_serv.c	Change vnode operations create, mknod, mkdir and symlink to return	2014-01-23 10:13:55 +00:00
nfs_socket.c	Backout wildcard pragma to kill warnings and instead sprinkle a few dozen	2013-09-14 22:29:08 +00:00
nfs_srvcache.c
nfs_srvsocket.c
nfs_srvsubs.c	Rename the new ni_startdir (the slot used to hold the starting point	2012-11-05 19:06:26 +00:00
nfs_subs.c	knf (blank line even if there are no local declarations)	2013-09-18 23:27:38 +00:00
nfs_syscalls.c	CID 271162: NULL deref check	2013-11-27 22:10:47 +00:00
nfs_var.h	don't allow the nfs server module to unload if it has exported filesystems.	2013-12-14 16:19:28 +00:00
nfs_vfsops.c	Ensure that the top level sysctl nodes (kern, vfs, net, ...) exist before	2014-02-25 18:30:08 +00:00
nfs_vnops.c	Change vnode operation lookup to return the resulting vnode *vpp unlocked.	2014-02-07 15:29:20 +00:00
nfs.h	Retire OSI network stack. OK core@	2013-03-01 18:25:13 +00:00
nfsdiskless.h
nfsm_subs.h	Backout wildcard pragma to kill warnings and instead sprinkle a few dozen	2013-09-14 22:29:08 +00:00
nfsmount.h
nfsnode.h
nfsproto.h
nfsrtt.h
nfsrvcache.h
rpcv2.h
xdr_subs.h