Konstantin Belousov 140dedb81c The r241025 fixed the case when a binary, executed from nullfs mount, ... was still possible to open for write from the lower filesystem. There is a symmetric situation where the binary could already has file descriptors opened for write, but it can be executed from the nullfs overlay. Handle the issue by passing one v_writecount reference to the lower vnode if nullfs vnode has non-zero v_writecount. Note that only one write reference can be donated, since nullfs only keeps one use reference on the lower vnode. Always use the lower vnode v_writecount for the checks. Introduce the VOP_GET_WRITECOUNT to read v_writecount, which is currently always bypassed to the lower vnode, and VOP_ADD_WRITECOUNT to manipulate the v_writecount value, which manages a single bypass reference to the lower vnode. Caling the VOPs instead of directly accessing v_writecount provide the fix described in the previous paragraph. Tested by: pho MFC after: 3 weeks		2012-11-02 13:56:36 +00:00
..
amd64	Enable the new instructions for reading and writing bases for %fs,	2012-11-01 15:17:43 +00:00
arm	Fix build for SMP.	2012-11-01 12:26:31 +00:00
boot	Fix loader crash when some unhalted exception happens during include	2012-10-26 16:32:20 +00:00
bsm
cam	Use M_ZERO instead of explicit memsets and bzeros.	2012-10-30 12:52:41 +00:00
cddl	s/dettach/detach/g	2012-10-30 01:29:45 +00:00
compat	The r241025 fixed the case when a binary, executed from nullfs mount,	2012-11-02 13:56:36 +00:00
conf	Small textdump enhancements.	2012-11-01 04:07:08 +00:00
contrib	Handle the management port on the EBT5600 and disable loopback. The XAUI	2012-11-01 03:45:33 +00:00
crypto	Revert previous commit...	2012-10-10 08:36:38 +00:00
ddb	Small textdump enhancements.	2012-11-01 04:07:08 +00:00
dev	- If DRM_DEBUG_DEFAULT_ON is defined, then initialize drm_debug_flagi to	2012-11-02 05:26:33 +00:00
fs	The r241025 fixed the case when a binary, executed from nullfs mount,	2012-11-02 13:56:36 +00:00
gdb
geom	Provide a device name in the sysctl tree for programs to query the	2012-11-01 17:01:05 +00:00
gnu/fs	Add an unified macro to deny ability from the compiler to reorder	2012-10-09 14:32:30 +00:00
i386	The r241025 fixed the case when a binary, executed from nullfs mount,	2012-11-02 13:56:36 +00:00
ia64	Fix compilation on ia64 when page size is configured for 16KB.	2012-10-28 11:53:54 +00:00
isa
kern	The r241025 fixed the case when a binary, executed from nullfs mount,	2012-11-02 13:56:36 +00:00
kgssapi
libkern	s/ is is / is /g	2012-09-14 22:00:03 +00:00
mips	Drop this from 500 to 128, to save a little space on memory constrained	2012-11-02 05:23:05 +00:00
modules	Extend dim's hack from r228978: not only clang but gcc on non-x86 platforms	2012-10-28 02:15:35 +00:00
net	Remove the recently added sysctl variable net.pfil.forward.	2012-11-02 01:20:55 +00:00
net80211	Add some further BAR TX debugging; it was useful when figuring out	2012-10-28 04:18:49 +00:00
netatalk
netgraph	Switch the entire IPv4 stack to keep the IP packet header	2012-10-22 21:09:03 +00:00
netinet	Remove the recently added sysctl variable net.pfil.forward.	2012-11-02 01:20:55 +00:00
netinet6	Remove the recently added sysctl variable net.pfil.forward.	2012-11-02 01:20:55 +00:00
netipsec	Do not reduce ip_len by size of IP header in the ip_input()	2012-10-23 08:33:13 +00:00
netipx
netnatm
netncp	Add characters mapping for codepages used in Germany.	2012-06-01 03:59:08 +00:00
netpfil	Remove the recently added sysctl variable net.pfil.forward.	2012-11-02 01:20:55 +00:00
netsmb	Fix panic due to page faults while in kernel mode, under conditions of	2012-10-31 03:34:07 +00:00
nfs	Add two new options to the nfssvc(2) syscall that allow	2012-10-14 22:33:17 +00:00
nfsclient	Do not leave invalid pages in the object after the short read for a	2012-08-14 11:45:47 +00:00
nfsserver	Remove the support for using non-mpsafe filesystem modules.	2012-10-22 17:50:54 +00:00
nlm	Remove the support for using non-mpsafe filesystem modules.	2012-10-22 17:50:54 +00:00
ofed	remove duplicate semicolons where possible.	2012-10-22 03:00:37 +00:00
opencrypto	Revert previous commit...	2012-10-10 08:36:38 +00:00
pc98	The 'testing memory' patch gets printed too many times	2012-10-22 11:57:26 +00:00
pci
powerpc	Work around broken device tree on last-generation PowerPC iMacs	2012-10-29 14:27:28 +00:00
rpc	Modify the comment to take out the names and URL.	2012-10-25 19:30:58 +00:00
security	Remove the support for using non-mpsafe filesystem modules.	2012-10-22 17:50:54 +00:00
sparc64	- Give PIL_PREEMPT the lowest priority just above low/stray interrupts.	2012-10-20 12:07:48 +00:00
sys	Provide a device name in the sysctl tree for programs to query the	2012-11-01 17:01:05 +00:00
teken
tools	Revert previous commit...	2012-10-10 08:36:38 +00:00
ufs	The r241025 fixed the case when a binary, executed from nullfs mount,	2012-11-02 13:56:36 +00:00
vm	The r241025 fixed the case when a binary, executed from nullfs mount,	2012-11-02 13:56:36 +00:00
x86	Provide the reading and display of the Standard Extended Features,	2012-11-01 15:14:37 +00:00
xdr
xen	Move the corresponding MTX_SYSINIT() next to their struct mtx declaration	2012-10-26 17:31:35 +00:00
Makefile