John Baldwin 593efaf9f7 Further refine the handling of stop signals in the NFS client. The ... changes in r246417 were incomplete as they did not add explicit calls to sigdeferstop() around all the places that previously passed SBDRY to _sleep(). In addition, nfs_getcacheblk() could trigger a write RPC from getblk() resulting in sigdeferstop() recursing. Rather than manually deferring stop signals in specific places, change the VFS_*() and VOP_*() methods to defer stop signals for filesystems which request this behavior via a new VFCF_SBDRY flag. Note that this has to be a VFC flag rather than a MNTK flag so that it works properly with VFS_MOUNT() when the mount is not yet fully constructed. For now, only the NFS clients are set this new flag in VFS_SET(). A few other related changes: - Add an assertion to ensure that TDF_SBDRY doesn't leak to userland. - When a lookup request uses VOP_READLINK() to follow a symlink, mark the request as being on behalf of the thread performing the lookup (cnp_thread) rather than using a NULL thread pointer. This causes NFS to properly handle signals during this VOP on an interruptible mount. PR: kern/176179 Reported by: Russell Cattelan (sigdeferstop() recursion) Reviewed by: kib MFC after: 1 month		2013-02-21 19:02:50 +00:00
..
cd9660	Complete MPSAFE VFS interface and remove MNTK_MPSAFE flag.	2012-11-09 18:02:25 +00:00
coda	Fix the mis-handling of the VV_TEXT on the nullfs vnodes.	2012-09-28 11:25:02 +00:00
deadfs	The deadfs VOPs for vop_ioctl and vop_bmap call itself recursively,	2012-09-13 13:05:45 +00:00
devfs	Stop translating the ERESTART error from the open(2) into EINTR.	2013-02-07 14:53:33 +00:00
ext2fs	ext2fs: Use prototype declarations for function definitions	2013-02-10 19:49:37 +00:00
fdescfs	Revert r246791 as it needs a security review first	2013-02-14 15:17:53 +00:00
fifofs	I am comparing current pipe code with the one in 8.3-STABLE r236165,	2012-07-31 05:48:35 +00:00
fuse	Add support for IO_APPEND flag in fuse	2013-01-08 12:21:50 +00:00
hpfs	Fix up kernel sources to be ready for a 64-bit ino_t.	2012-09-27 23:30:49 +00:00
msdosfs	Do not update the fsinfo block on each update of any fat block, this	2013-02-17 20:35:54 +00:00
nandfs	Remove the last use of the deprecated MNT_VNODE_FOREACH interface in	2013-01-03 19:01:56 +00:00
nfs	Further refine the handling of stop signals in the NFS client. The	2013-02-21 19:02:50 +00:00
nfsclient	Further refine the handling of stop signals in the NFS client. The	2013-02-21 19:02:50 +00:00
nfsserver	Further cleanups to use of timestamps in NFS:	2013-01-25 15:25:24 +00:00
ntfs	Fix up kernel sources to be ready for a 64-bit ino_t.	2012-09-27 23:30:49 +00:00
nullfs	Remove the filtering of the acceptable mount options for nullfs, added	2013-01-16 05:32:49 +00:00
nwfs	Do not leave invalid pages in the object after the short read for a	2012-08-14 11:45:47 +00:00
portalfs	Use NULL instead of 0 for pointers	2012-07-22 15:40:31 +00:00
procfs	Remove the support for using non-mpsafe filesystem modules.	2012-10-22 17:50:54 +00:00
pseudofs	Complete MPSAFE VFS interface and remove MNTK_MPSAFE flag.	2012-11-09 18:02:25 +00:00
smbfs	- smbfs_rename() might return an error value without correctly upgrading	2012-11-26 04:29:47 +00:00
tmpfs	Remove a racy checks on resident and cached pages for	2013-02-10 01:04:10 +00:00
udf	Complete MPSAFE VFS interface and remove MNTK_MPSAFE flag.	2012-11-09 18:02:25 +00:00
unionfs	r16312 is not any longer real since many years (likely since when VFS	2012-11-19 22:43:45 +00:00