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History log of /src/sys/miscfs/genfs/layer_extern.h
RevisionDateAuthorComments
 1.41  17-Jan-2020  ad VFS_VGET(), VFS_ROOT(), VFS_FHTOVP(): give them a "int lktype" argument, to
allow us to get shared locks (or no lock) on the returned vnode. Matches
FreeBSD.
 1.40  04-Jun-2017  hannken branches: 1.40.6; 1.40.12;
Locking a layer vnode using the regular bypass routine is no longer
racy. Undo the change from 2017-03-30 11:16:52, commitid eurqbzuGxGRlryLz
and make vi_lock a krwlock_t again.
 1.39  30-Mar-2017  hannken branches: 1.39.6;
Locking a layer vnode is racy as it may become reclaimed before
calling the operation on the lower vnode.

Replace vi_lock with a rw_obj and change layered file systems
to share the lock with the lower vnode.

Layered file systems now use genfs_lock()/_unlock/_islocked().

Welcome to 7.99.67
 1.38  17-Feb-2017  hannken Add generic genfs_suspendctl() and use it for all file systems.
Layered file systems need work.
 1.37  27-Jan-2017  hannken Handle v_writecount from layer_open(), layer_close() and layer_revoke()
so lower file system vnodes get marked as open for writing.
 1.36  25-May-2014  hannken branches: 1.36.4; 1.36.8; 1.36.12;
Change layerfs from hashlist to vcache.
Make VI_LOCKSHARE public again.

Ride 6.99.43
 1.35  27-Feb-2014  hannken branches: 1.35.2;
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
 1.34  01-Feb-2012  dholland branches: 1.34.6; 1.34.10;
Change the syscall API for quotas over to the new non-proplib one.

- struct vfs_quotactl_args -> struct quotactl_args
- add sys/stdint.h to sys/quotactl.h for clean userland build
- install sys/quotactl.h in /usr/include
- update set lists for same
- add new marshalling code in libquota
- add new unmarshalling code in vfs_syscalls.c
- discard proplib interpreter code in vfs_quotactl.c
- add dispatching code for the 14 quotactl ops in vfs_quotactl.c
- mark the proplib quotactl syscall obsolete
- add a new syscall number for the new quotactl syscall
- change the name of the syscall to __quotactl()
- remove the decl of the old quotactl from quota/quotaprop.h
- add a decl of the new quotactl to sys/quotactl.h
- update the libc build
- update ktruss
- remove proplib marshalling code from libquota
- update copy of syscall table in gdb ppc sources
- hack rumphijack to accomodate new quotactl name (as I recall,
pooka wanted such a name change to simplify something, but I
don't really see what/how)

This change appears to require a kernel version bump for rumpish
reasons.
 1.33  29-Jan-2012  dholland Remove the extra op argument to VFS_QUOTACTL() - the op is now stored
purely in the args structure.

This change requires a kernel version bump.
 1.32  29-Jan-2012  dholland Introduce struct vfs_quotactl_args. Use it.

This change uglifies vfs_quotactl some in order to make room for
moving operation-specific but FS-independent logic out of ufs_quota.c.

Note: this change requires a kernel version bump.
 1.31  29-Jan-2012  dholland Move the proplib-based quota command dispatching (that is, the code
that knows the magic string names for the allowed actions) out of
UFS-specific code and to fs-independent code.

This introduces QUOTACTL_* operation codes and changes the signature
of VFS_QUOTACTL() again for compile safety.

Note: this change requires a kernel version bump.
 1.30  29-Jan-2012  dholland Move the code for iterating over the multiple RPC calls in a quota
proplib XML packet to vfs_quotactl.c out of sys/ufs/ufs.

Add a dummy extra arg to VFS_QUOTACTL for compile safety.

Note: this change requires a kernel version bump.
 1.29  11-Jul-2011  hannken branches: 1.29.2; 1.29.6;
Change VOP_BWRITE() to take a vnode as its first argument like all other
VOPs do. Layered file systems no longer have to modify bp->b_vp and run
into trouble when an async VOP_BWRITE() uses the wrong vnode.

- change all occurences of VOP_BWRITE(bp) to VOP_BWRITE(bp->b_vp, bp).
- remove layer_bwrite().
- welcome to 5.99.55

Adresses PR kern/38762 panic: vwakeup: neg numoutput

No objections from tech-kern@.
 1.28  06-Mar-2011  bouyer merge the bouyer-quota2 branch. This adds a new on-disk format
to store disk quota usage and limits, integrated with ffs
metadata. Usage is checked by fsck_ffs (no more quotacheck)
and is covered by the WAPBL journal. Enabled with kernel
option QUOTA2 (added where QUOTA was enabled in kernel config files),
turned on with tunefs(8) on a per-filesystem
basis. mount_mfs(8) can also turn quotas on.

See http://mail-index.netbsd.org/tech-kern/2011/02/19/msg010025.html
for details.
 1.27  10-Jan-2011  hannken branches: 1.27.2; 1.27.4;
Add layer_revoke() that adjusts the lower vnode use count to be at least as
high as the upper vnode count before passing down the VOP_REVOKE().

This way vclean() check for active (vp->v_usecount > 1) vnodes gets it right.

Should fix PR kern/43456.
 1.26  02-Jul-2010  hannken LK_INTERLOCK is no longer a valid flag for VOP_LOCK(). This makes
layer_*lock*() obsolete. Remove them and handle lock operations
with the generic bypass function.

Ride 5.99.34.
 1.25  02-Jul-2010  rmind Slightly clean-up layerfs and nullfs: update the big description more to
the reality (remove duplicate one in nullfs, merge some differences from
it), KNF, improve and update some comments, add few KASSERT()s, remove
unused declarations, avoid double inclusion of headers, misc.

No functional changes.
 1.24  28-Jan-2008  dholland branches: 1.24.10; 1.24.30; 1.24.32;
Fix some race conditions in rename.
Introduce a per-FS rename lock and new vfsops to manipulate it.
Get this lock while renaming. Also add another relookup() in do_sys_rename,
which is a hack to kludge around some of the worst deficiencies of
ufs_rename.
reviewed-by: pooka (and an earlier rev by ad)
posted on tech-kern with no objections.
 1.23  26-Nov-2007  pooka Remove the "struct lwp *" argument from all VFS and VOP interfaces.
The general trend is to remove it from all kernel interfaces and
this is a start. In case the calling lwp is desired, curlwp should
be used.

quick consensus on tech-kern
 1.22  13-Jul-2006  martin branches: 1.22.28; 1.22.30; 1.22.36;
Fix alignement problems for fhandle_t, exposed by gcc4.1.

While touching all vptofh/fhtovp functions, get rid of VFS_MAXFIDSIZ,
version the getfh(2) syscall and explicitly pass the size available in
the filehandle from userland.

Discussed on tech-kern, with lots of help from yamt (thanks!).
 1.21  14-May-2006  elad branches: 1.21.4;
integrate kauth.
 1.20  11-Dec-2005  christos branches: 1.20.4; 1.20.6; 1.20.8; 1.20.10; 1.20.12;
merge ktrace-lwp.
 1.19  23-Sep-2005  jmmv Apply the NFS exports list rototill patch:

- Remove all NFS related stuff from file system specific code.
- Drop the vfs_checkexp hook and generalize it in the new nfs_check_export
function, thus removing redundancy from all file systems.
- Move all NFS export-related stuff from kern/vfs_subr.c to the new
file sys/nfs/nfs_export.c. The former was becoming large and its code
is always compiled, regardless of the build options. Using the latter,
the code is only compiled in when NFSSERVER is enabled. While doing this,
also make some functions in nfs_subs.c conditional to NFSSERVER.
- Add a new command in nfssvc(2), called NFSSVC_SETEXPORTSLIST, that takes a
path and a set of export entries. At the moment it can only clear the
exports list or append entries, one by one, but it is done in a way that
allows setting the whole set of entries atomically in the future (see the
comment in mountd_set_exports_list or in doc/TODO).
- Change mountd(8) to use the nfssvc(2) system call instead of mount(2) so
that it becomes file system agnostic. In fact, all this whole thing was
done to remove a 'XXX' block from this utility!
- Change the mount*, newfs and fsck* userland utilities to not deal with NFS
exports initialization; done internally by the kernel when initializing
the NFS support for each file system.
- Implement an interface for VFS (called VFS hooks) so that several kernel
subsystems can run arbitrary code upon receipt of specific VFS events.
At the moment, this only provides support for unmount and is used to
destroy NFS exports lists from the file systems being unmounted, though it
has room for extension.

Thanks go to yamt@, chs@, thorpej@, wrstuden@ and others for their comments
and advice in the development of this patch.
 1.18  30-Aug-2005  xtraeme Remove __P()
 1.17  30-Jun-2004  hannken branches: 1.17.12;
Do LAYERFS_REMOVED for vop_rmdir.

Reviewed by: Bill Studenmund <wrstuden@netbsd.org>
 1.16  07-Jun-2004  yamt do a LAYERFS_REMOVED hack for vop_rename as well.
 1.15  29-May-2004  wrstuden Add layerfs_snapshot() as a handler routine for VFS_SNAPSHOT() calls
through a layered file system.

Note: we don't actually support snapshots through a layered file system,
and this routine returns an error. However we: 1) have clearly documented
what needs fixing (which isn't trivial to fix) and 2) if we do fix
this, all layered file systems can take advantage of it at once.
 1.14  28-May-2004  wrstuden Since VOP_UPCALL() has been a long time in coming, add this partial
fix for layered-file-removal. It will work for the case of accessing
and deleting a file through the layered file system. Accessing via
the layer and deleting on the underlying still won't work, nor will
accessing via complicated structures (like two umap layers over a
given file systems).

We still need VOP_UPCALL(), but this is better than things were before.

This patch has been discussed off & on for a while. This incarnation
was tested by hannken at netbsd dot org.
 1.13  27-Apr-2004  jrf First pass for some caddr_t removal and changes to get rid of it where we
no longer use and/or need it

- removed casts from unionfs, deadfs and fdesc
(there are more to hunt down still)
- changed vfs_quotactl args argumet from caddr_t to void *
- changed vfs_quotactl structures/callers to reflect the api change

Compiled fine and ran for about a day. Approved/reviewed by
christos@netbsd.org and gimpy@netbsd.org.
 1.12  21-Apr-2004  christos Replace the statfs() family of system calls with statvfs().
Retain binary compatibility.
 1.11  25-Jan-2004  hannken branches: 1.11.2;
Make VOP_STRATEGY(bp) a real VOP as discussed on tech-kern.

VOP_STRATEGY(bp) is replaced by one of two new functions:

- VOP_STRATEGY(vp, bp) Call the strategy routine of vp for bp.
- DEV_STRATEGY(bp) Call the d_strategy routine of bp->b_dev for bp.

DEV_STRATEGY(bp) is used only for block-to-block device situations.
 1.10  04-Dec-2003  atatat Dynamic sysctl.

Gone are the old kern_sysctl(), cpu_sysctl(), hw_sysctl(),
vfs_sysctl(), etc, routines, along with sysctl_int() et al. Now all
nodes are registered with the tree, and nodes can be added (or
removed) easily, and I/O to and from the tree is handled generically.

Since the nodes are registered with the tree, the mapping from name to
number (and back again) can now be discovered, instead of having to be
hard coded. Adding new nodes to the tree is likewise much simpler --
the new infrastructure handles almost all the work for simple types,
and just about anything else can be done with a small helper function.

All existing nodes are where they were before (numerically speaking),
so all existing consumers of sysctl information should notice no
difference.

PS - I'm sorry, but there's a distinct lack of documentation at the
moment. I'm working on sysctl(3/8/9) right now, and I promise to
watch out for buses.
 1.9  07-Aug-2003  agc Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22364, verified by myself.
 1.8  29-Jun-2003  fvdl branches: 1.8.2;
Back out the lwp/ktrace changes. They contained a lot of colateral damage,
and need to be examined and discussed more.
 1.7  29-Jun-2003  thorpej Undo part of the ktrace/lwp changes. In particular:
* Remove the "lwp *" argument that was added to vget(). Turns out
that nothing actually used it!
* Remove the "lwp *" arguments that were added to VFS_ROOT(), VFS_VGET(),
and VFS_FHTOVP(); all they did was pass it to vget() (which, as noted
above, didn't use it).
* Remove all of the "lwp *" arguments to internal functions that were added
just to appease the above.
 1.6  28-Jun-2003  darrenr Pass lwp pointers throughtout the kernel, as required, so that the lwpid can
be inserted into ktrace records. The general change has been to replace
"struct proc *" with "struct lwp *" in various function prototypes, pass
the lwp through and use l_proc to get the process pointer when needed.

Bump the kernel rev up to 1.6V
 1.5  06-Dec-2001  chs add VOP_GETPAGES and VOP_PUTPAGES methods for layered filesystems.
drop the interlock on the upper layer, acquire the interlock on the
lower layer.
 1.4  07-Jun-2001  wiz branches: 1.4.2;
Typos in comments (misc/13133 by Michael K. Sanders)
 1.3  16-Mar-2000  jdolecek branches: 1.3.6;
Add new VFS op routine - vfs_done and call it on filesystem detach
in vfs_detach(). vfs_done may free global filesystem's resources,
typically those allocated in respective filesystem's init function.
Needed so those filesystems which went in via LKM have a chance to
clean after themselves before unloading. This fixes random panics
when LKM for filesystem using pools was loaded and unloaded several
times.

For each leaf filesystem, add appropriate vfs_done routine.
 1.2  13-Mar-2000  soren Fix doubled 'the's in comments.
 1.1  08-Jul-1999  wrstuden branches: 1.1.2; 1.1.4;
Introduce layer library in genfs. This set of files abstracts most of
the functionality of nullfs. The latter is now just a mount & unmount
routine, and a few tables. umapfs borrow most of this infrastructure.

Both fs's are now nfs-exportable.

All layered fs's share a common format to private mount & private
vnode structs (which a particular fs can extend).

Also add genfs_noerr_rele(), a vnode op which will vrele/vput
operand vnodes appropriately.
 1.1.4.1  20-Nov-2000  bouyer Update thorpej_scsipi to -current as of a month ago
 1.1.2.2  02-Aug-1999  thorpej Update from trunk.
 1.1.2.1  08-Jul-1999  thorpej file layer_extern.h was added on branch chs-ubc2 on 1999-08-02 22:27:34 +0000
 1.3.6.2  08-Jan-2002  nathanw Catch up to -current.
 1.3.6.1  21-Jun-2001  nathanw Catch up to -current.
 1.4.2.1  10-Jan-2002  thorpej Sync kqueue branch with -current.
 1.8.2.6  10-Nov-2005  skrll Sync with HEAD. Here we go again...
 1.8.2.5  21-Sep-2004  skrll Fix the sync with head I botched.
 1.8.2.4  18-Sep-2004  skrll Sync with HEAD.
 1.8.2.3  24-Aug-2004  skrll Undo part of the ktrace/lwp changes. In particular:
* Remove the "lwp *" argument that was added to vget(). Turns out
that nothing actually used it!
* Remove the "lwp *" arguments that were added to VFS_ROOT(), VFS_VGET(),
and VFS_FHTOVP(); all they did was pass it to vget() (which, as noted
above, didn't use it).
* Remove all of the "lwp *" arguments to internal functions that were added
just to appease the above.
 1.8.2.2  03-Aug-2004  skrll Sync with HEAD
 1.8.2.1  02-Jul-2003  darrenr Apply the aborted ktrace-lwp changes to a specific branch. This is just for
others to review, I'm concerned that patch fuziness may have resulted in some
errant code being generated but I'll look at that later by comparing the diff
from the base to the branch with the file I attempt to apply to it. This will,
at the very least, put the changes in a better context for others to review
them and attempt to tinker with removing passing of 'struct lwp' through
the kernel.
 1.11.2.3  02-Jul-2004  he Pull up revision 1.17 (requested by hannken in ticket #575):
Do LAYERFS_REMOVED for vop_rmdir.
 1.11.2.2  21-Jun-2004  tron Pull up revision 1.16 (requested by yamt in ticket #512):
do a LAYERFS_REMOVED hack for vop_rename as well.
 1.11.2.1  30-May-2004  tron Pull up revision 1.14 (requested by wrstuden in ticket #424):
Since VOP_UPCALL() has been a long time in coming, add this partial
fix for layered-file-removal. It will work for the case of accessing
and deleting a file through the layered file system. Accessing via
the layer and deleting on the underlying still won't work, nor will
accessing via complicated structures (like two umap layers over a
given file systems).
We still need VOP_UPCALL(), but this is better than things were before.
This patch has been discussed off & on for a while. This incarnation
was tested by hannken at netbsd dot org.
 1.17.12.4  04-Feb-2008  yamt sync with head.
 1.17.12.3  07-Dec-2007  yamt sync with head
 1.17.12.2  30-Dec-2006  yamt sync with head.
 1.17.12.1  21-Jun-2006  yamt sync with head.
 1.20.12.1  24-May-2006  tron Merge 2006-05-24 NetBSD-current into the "peter-altq" branch.
 1.20.10.2  20-Apr-2006  christos kauth_cred_t -> struct kauth_cred;
 1.20.10.1  08-Mar-2006  elad Adapt to kernel authorization KPI.
 1.20.8.2  11-Aug-2006  yamt sync with head
 1.20.8.1  24-May-2006  yamt sync with head.
 1.20.6.1  01-Jun-2006  kardel Sync with head.
 1.20.4.1  09-Sep-2006  rpaulo sync with head
 1.21.4.1  13-Jul-2006  gdamore Merge from HEAD.
 1.22.36.2  18-Feb-2008  mjf Sync with HEAD.
 1.22.36.1  08-Dec-2007  mjf Sync with HEAD.
 1.22.30.2  23-Mar-2008  matt sync with HEAD
 1.22.30.1  09-Jan-2008  matt sync with HEAD
 1.22.28.1  27-Nov-2007  joerg Sync with HEAD. amd64 Xen support needs testing.
 1.24.32.3  21-Apr-2011  rmind sync with head
 1.24.32.2  05-Mar-2011  rmind sync with head
 1.24.32.1  03-Jul-2010  rmind sync with head
 1.24.30.1  17-Aug-2010  uebayasi Sync with HEAD.
 1.24.10.1  11-Aug-2010  yamt sync with head.
 1.27.4.1  20-Jan-2011  bouyer Snapshot of work in progress on a modernised disk quota system:
- new quotactl syscall (versionned for backward compat), which takes
as parameter a path to a mount point, and a prop_dictionary
(in plistref format) describing commands and arguments.
For each command, status and data are returned as a prop_dictionary.
quota commands features will be added to take advantage of this,
exporting quota data or getting quota commands as plists.

- new on disk-format storage (all 64bit wide), integrated to metadata for
ffs (and playing nicely with wapbl).
Quotas are enabled on a ffs filesystem via superblock flags.
tunefs(8) can enable or disable quotas.
On a quota-enabled filesystem, fsck_ffs(8) will track per-uid/gid
block and inode usages, and will check and update quotas in Pass 6.
quota usage and limits are stored in unliked files (one for users,
one for groups)l fsck_ffs(8) will create the files if needed, or
free them if needed. This means that after enabling or disabling
quotas on a filesystem; a fsck_ffs(8) run is required.
quotacheck(8) is not needed any more, on a unclean shutdown
fsck or journal replay will take care of fixing quotas.
newfs(8) can create a ready-to-mount quota-enabled filesystem
(superblock flags are set and quota inodes are created).
Other new features or semantic changes:
- default quota datas, applied to users or groups which don't already
have a quota entry
- per-user/group grace time (instead of a filesystem global one)
- 0 really means "nothing allowed at all", not "no limit".
If you want "no limit", set the limit to UQUAD_MAX (tools will
understand "unlimited" and "-")

A quota file is structured as follow:
it starts with a header, containing a few per-filesystem values,
and the default quota limits.
Quota entries are linked together as a simple list, each entry has a
pointer (as an offset withing the file) to the next.
The header has a pointer to a list of free quota entries, and
a hash table of in-use entries. The size of the hash table depends
on the filesystem block size (header+hash table should fit in the
first block). The file is not sparse and is a multiple of
filesystem block size (when the free quota entry list is empty a new
filesystem block is allocated). quota entries to not cross
filesystem block boundaries.

In memory, the kernel keeps a cache of recently used quota entries
as a reference to the block number, and offset withing the block.
The quota entry itself is keept in the buf cache.

fsck_ffs(8), tunefs(8) and newfs(8) supports are completed (with
related atf tests :)
The kernel can update disk usage and report it via quotactl(2).

Todo: enforce quotas limits (limits are not checked by kernel yet)
update repquota, edquota and rpc.rquotad to the new world
implement compat_50_quotactl ioctl.
update quotactl(2) man page

fsck_ffs required fixes so that allocating new blocks or inodes will
properly update the superblock and cg sumaries. This was not an issue up
to now because superblock and cg sumaries check happened last, but now
allocations or frees can happen in pass 6.
 1.27.2.1  06-Jun-2011  jruoho Sync with HEAD.
 1.29.6.1  18-Feb-2012  mrg merge to -current.
 1.29.2.2  22-May-2014  yamt sync with head.

for a reference, the tree before this commit was tagged
as yamt-pagecache-tag8.

this commit was splitted into small chunks to avoid
a limitation of cvs. ("Protocol error: too many arguments")
 1.29.2.1  17-Apr-2012  yamt sync with head
 1.34.10.1  18-May-2014  rmind sync with head
 1.34.6.2  03-Dec-2017  jdolecek update from HEAD
 1.34.6.1  20-Aug-2014  tls Rebase to HEAD as of a few days ago.
 1.35.2.1  10-Aug-2014  tls Rebase.
 1.36.12.1  21-Apr-2017  bouyer Sync with HEAD
 1.36.8.2  26-Apr-2017  pgoyette Sync with HEAD
 1.36.8.1  20-Mar-2017  pgoyette Sync with HEAD
 1.36.4.2  28-Aug-2017  skrll Sync with HEAD
 1.36.4.1  05-Feb-2017  skrll Sync with HEAD
 1.39.6.1  04-Jun-2017  bouyer pullup the following revisions, requested by hannken in ticket #2:
src/share/man/man9/fstrans.9 1.25
src/sys/kern/vfs_mount.c 1.66
src/sys/kern/vfs_subr.c 1.468
src/sys/kern/vfs_trans.c 1.46
src/sys/kern/vfs_vnode.c 1.94, 1.95, 1.96
src/sys/kern/vnode_if.c 1.105, 1.106
src/sys/kern/vnode_if.sh 1.65, 1.66
src/sys/kern/vnode_if.src 1.76
src/sys/miscfs/genfs/genfs_io.c 1.69
src/sys/miscfs/genfs/genfs_vnops.c 1.196, 1.197
src/sys/miscfs/genfs/layer_extern.h 1.40
src/sys/miscfs/genfs/layer_vfsops.c 1.51
src/sys/miscfs/genfs/layer_vnops.c 1.67
src/sys/miscfs/nullfs/null_vnops.c 1.42
src/sys/miscfs/overlay/overlay_vnops.c 1.24
src/sys/miscfs/umapfs/umap_vnops.c 1.60
src/sys/rump/include/rump/rumpvnode_if.h 1.29, 1.30
src/sys/rump/librump/rumpkern/emul.c 1.182
src/sys/rump/librump/rumpvfs/rumpvnode_if.c 1.29, 1.30
src/sys/sys/fstrans.h 1.11
src/sys/sys/vnode.h 1.278
src/sys/sys/vnode_if.h 1.100, 1.101
src/sys/sys/vnode_impl.h 1.14, 1.15
src/sys/ufs/lfs/lfs_pages.c 1.12

Vnode state, lock and fstrans cleanup:
- Rename vnode state "VS_ACTIVE" to "VS_LOADED" and add synthetic
state "VS_ACTIVE" to assert a loaded vnode with usecount > 0.

- Redo FSTRANS in vnode_if.c and use it for VOP_LOCK and VOP_UNLOCK.

- Cleanup the genfs lock operations.

- Make "struct vnode_impl" member "vi_lock" a krwlock_t again.

- Remove the lock type argument from fstrans_start and
fstrans_start_nowait,
remove now unused FSTRANS state "FSTRANS_SUSPENDING".
 1.40.12.1  17-Jan-2020  ad Sync with head.
 1.40.6.1  08-Apr-2020  martin Merge changes from current as of 20200406

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