sync with freebsd

sync nullfs and nfs with freebsd

add autofs from freebsd

sync pseudofs with freebsd

sync tmpfs with freebsd 10 stable

sync unionfs with freebsd

nfs changes

ext2fs: update Block Group Descriptor struct plus cosmetic fixes.

Rework the handling of stop signals in the NFS client.  The changes in
195702, 195703, and 195821 prevented a thread from suspending while holding
locks inside of NFS by forcing the thread to fail sleeps with EINTR or
ERESTART but defer the thread suspension to the user boundary.  However,
this had the effect that stopping a process during an NFS request could
abort the request and trigger EINTR errors that were visible to userland
processes (previously the thread would have suspended and completed the
request once it was resumed).

This change instead effectively masks stop signals while in the NFS client.
It uses the existing TDF_SBDRY flag to effect this since SIGSTOP cannot
be masked directly.  Instead of setting PBDRY on individual sleeps, 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 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.
- Ignore thread suspend requests due to SIGSTOP if stop signals are
  currently deferred.  This can occur if a process is stopped via
  SIGSTOP while a thread is running or runnable but before it has set
  TDF_SBDRY.

Obtained from: FreeBSD

Add support for the eofflag to nfs_readdir() in the new NFS
client so that it works under a unionfs mount.

Do a sync of the devvp vnode for the mount, which buffers, among other
things, contain FAT blocks.  This makes fsync(2) for msdosfs more correct
by syncing the metadata needed to read the synced data.

Both NFS clients can deadlock when using the "rdirplus" mount
option. This can occur when an nfsiod thread that already holds
a buffer lock attempts to acquire a vnode lock on an entry in
the directory (a LOR) when another thread holding the vnode lock
is waiting on an nfsiod thread. This patch avoids the deadlock by disabling
readahead for this case, so the nfsiod threads never do readdirplus.
Since readaheads for directories need the directory offset cookie
from the previous read, they cannot normally happen in parallel.
As such, testing by jhb@ and myself didn't find any performance
degredation when this patch is applied. If there is a case where
this results in a significant performance degradation, mounting
without the "rdirplus" option can be done to re-enable readahead
for directories.

Obtained from: FreeBSD svn 250257

release teh v_writecount ref on the vnode in case of error.

remove negative name cache entry pointing to target name.

do not update the fsinfo block on each update of any fat block. postpone the flus to vfs sync

timestap fixes for NFS.

ext2fs: misc cleanup.

ext2fs: misc cleanup. Correct off by one error

ext2fs: general cleanups.

Backup FATs were sometimes marked dirty by copying their first block from the primary FAT, and then not marked clean. Force them to be clean

The mountmsdosfs function had an insane sanity test

assert that the mbuf in the chain has a sane length.

Revamp the CAM enclose services driver. This driver uses an in kernel daemon to track state changes.

make it possible to force async server side on NFS server.

disable the reallocation code. testing with fsx has revealed problems and in order to hunt the bugs reduce complexity.

remove the filtering of the acceptable mount oipitons for nullfs

cleanup the dinode structure.

when nullfs mount is forcibly unmounted and nullfs vnode is reclaimed.

more constatn renaming in pref for newer featues.

fix the mis-handling of teh VV_TEXT on the nullfs vnodes.

allow shared lookups for nullfs mounts.

sync a bit with netbsd

allow zfs export of tmpfs

partial revert of last commit

strealine use  of cdevpriv

deadfs VOPs for vop_ioctl and vop_bmap call itself recursively, which is an elaborate way to cause kernel panic. change the vops implementation to return EBADF for a reclaimed vnode.

do not need this header

do not override an error from uiomove with non error results from bwrite

Extend the KPI to lock and unlock f_offset member of struct file.  It
now fully encapsulates all accesses to f_offset, and extends f_offset
locking to other consumers that need it, in particular, to lseek() and
variants of getdirentries().

add htree related items

In pget(9), if PGET_NOTWEXIT flag is not specified, also search the
zombie list for the pid. This allows several kern.proc sysctls to
report useful information for zombies.

Hold the allproc_lock around all searches instead of relocking it.
Remove private pfind_locked() from the new nfs client code.

Look for zombie process only if we were given process id.

Obtained from: FreeBSD

fix a deadlock in nfs server

Security updates in nullfs and ifioctl

Fix a security vulnerability in nfsserver which can allow clients who send malformed requests (readdir) with a file as the path can corrupt memory or do other nasty things.

Fix obtained from: FreeBSD

sync

sync with freebsd 9 stable.

This commit was generated by cvs2svn to compensate for changes in r5075,
which included commits to RCS files with non-trunk default branches.

remove license clauses 3 & 4 per change in terms from NetBSD

Sync file systems with upcoming changes to vm and vfs

st_atimespec, st_mtimespec, st_birthtimespec etc have been renamed to follow POSIX 2008 specification.

Minor bugfixes to cd9660

timezone value is signed.

kdb_enter_why

Bring in two large changes from FreeBSD 7.1:

* DRM/DRI update for direct rendering on X.  This is a large update to support newer ATI and Intel graphics adapters with acceleration. This was original ported from Linux (it's not GPL)
* cdev per open file data.

Implement the per-open file data for the cdev.

 The patch does not change the cdevsw KBI. Management of the data is
 provided by the functions
 int     devfs_set_cdevpriv(void *priv, cdevpriv_dtr_t dtr);
 int     devfs_get_cdevpriv(void **datap);
 void    devfs_clear_cdevpriv(void);
 All of the functions are supposed to be called from the cdevsw method
 contexts.

 - devfs_set_cdevpriv assigns the priv as private data for the file
   descriptor which is used to initiate currently performed driver
   operation. dtr is the function that will be called when either the
   last refernce to the file goes away, the device is destroyed  or
   devfs_clear_cdevpriv is called.
 - devfs_get_cdevpriv is the obvious accessor.
 - devfs_clear_cdevpriv allows to clear the private data for the still
   open file.

 Implementation keeps the driver-supplied pointers in the struct
 cdev_privdata, that is referenced both from the struct file and struct
 cdev, and cannot outlive any of the referee.

Obtained from: FreeBSD

when vget fails because the vnode has been reclaimed, don't bother looping.

this should stop one of the two attacks on devfs found in freebsd

support chinese characters, etc.

$MidnightBSD$

Remove the hpfs file system.

Remove umapfs.  It is seriously broken.

$MidnightBSD$

fixes page fault on flash msdosfs

Remove bandaid.

Giant was locked on calls to sorecieve() and sosend() to fix a race condition which shouldn't be a problem anymore.

VFS SMP fixes, stack api, softupdates fixes.

VFS SMP fixes, stack api, softupdates fixes.

Call vfs_destroy_object() beofre v_data gets set to NULL

Change pfs_visible() to optionally return with the process still locked to simply locking and close some race conditions.

Minor adjustment on the value for "short filename" situations to match freebsd's behavior.  Using -1 makes more sense.

Correct file creation timestamp.

Fixed a bug in smbfs where an attacker can escape a chroot environment.  See FreeBSD-SA-06:16.smbfs

This commit was generated by cvs2svn to compensate for changes in r2, which
included commits to RCS files with non-trunk default branches.