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History log of /src/sys/coda/coda_vfsops.c
RevisionDateAuthorComments
 1.92  28-May-2025  andvar fix few typos in comments.
 1.91  17-May-2024  thorpej Remove unnecessary include of <sys/malloc.h>.
 1.90  28-Mar-2022  riastradh specfs: Let spec_node_lookup_by_dev wait for reclaim to finish.

vdevgone relies on this to ensure that if there is a concurrent
revoke in progress, it will wait for that revoke to finish -- that
way, it can guarantee all I/O operations have completed and the
device is closed.
 1.89  20-Nov-2020  hannken When validating the mount device string make sure its length
is below *data_len and below PATH_MAX.

Reported-by: syzbot+2d3af801141509cc858c@syzkaller.appspotmail.com
 1.88  14-Nov-2020  hannken Respect "lktype" in all paths in coda_root().
 1.87  17-Jan-2020  ad branches: 1.87.6;
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.
 1.86  04-Apr-2017  hannken branches: 1.86.4; 1.86.14; 1.86.20;
Use spec_node_lookup_by_dev() and spec_node_getmountedfs() to
retrieve a mount by device.
 1.85  17-Feb-2017  hannken Add generic genfs_suspendctl() and use it for all file systems.
Layered file systems need work.
 1.84  13-Dec-2014  hannken branches: 1.84.2; 1.84.4;
Change coda from hashlist to vcache.
- Replace all hash list crawlers with vfs_vnode_iterator.
 1.83  13-Dec-2014  hannken Move the definition of NVCODA and CODA_COMPAT_5 to coda.h,
remove them from coda_vfsops.c and coda_psdev.c.
 1.82  13-Dec-2014  hannken Attach the control object vnode to the coda mount and release it
on unmount. Initialize special files with NODEV.
 1.81  16-Apr-2014  maxv branches: 1.81.4;
An (un)privileged user can easily make the kernel dereference a NULL
pointer.

The kernel allows 'data' to be NULL; it's the fs's responsibility to
ensure that it isn't NULL (if the fs actually needs data).

ok christos@
 1.80  23-Mar-2014  hannken branches: 1.80.2;
Change all vfsops to use C99 designated initializers.

No functional changes intended.
 1.79  25-Feb-2014  pooka Ensure that the top level sysctl nodes (kern, vfs, net, ...) exist before
the sysctl link sets are processed, and remove redundancy.

Shaves >13kB off of an amd64 GENERIC, not to mention >1k duplicate
lines of code.
 1.78  27-Nov-2013  christos Change the queue.3 *_END(&head) macros to NULL. Since we don't have CIRCLEQ
anymore, all the macros expand to NULL anyway, so this improves readability.
Requested by rmind@
 1.77  23-Nov-2013  christos tuck in code inside the mutex
 1.76  23-Nov-2013  christos replace open-coded scan with macro; fix locking
 1.75  23-Nov-2013  riz Since mountlist is now a TAILQ, convert some missed usages
so things build again.
 1.74  02-Aug-2012  christos branches: 1.74.2; 1.74.4;
- move debugging functions to vcoda so modules with -DDEBUG link
- fix writing to coda files. this is probably not the right way to do
this, but it satisfies the locking protocol:
1. Sometimes coda_open() is called with an unlocked vnode which
does not satisfy the locking protocol. Lock it for now. We
need to find out why this happens
2. VFS_VGET sometimes returns the container vnode unlocked. What
is the locking protocol for VFS_VGET? We also lock it here.
 1.73  04-May-2012  christos depend on "vcoda" since it has symbols we need.
 1.72  26-Apr-2012  christos remove multiple definitions.
 1.71  26-Apr-2012  christos re-arrange things so that vcoda does not depend on coda.
 1.70  27-Sep-2011  christos branches: 1.70.2; 1.70.6; 1.70.8; 1.70.12; 1.70.14;
use CODA_MAXNAMLEN instead of bogus MAXNAMLEN
 1.69  29-Jun-2009  dholland Convert 67 namei call sites to use namei_simple, in these functions:

check_console, veriexecclose, veriexec_delete, veriexec_file_add,
emul_find_root, coff_load_shlib (sh3 version), coff_load_shlib,
compat_20_sys_statfs, compat_20_netbsd32_statfs,
ELFNAME2(netbsd32,probe_noteless), darwin_sys_statfs,
ibcs2_sys_statfs, ibcs2_sys_statvfs, linux_sys_uselib,
osf1_sys_statfs, sunos_sys_statfs, sunos32_sys_statfs,
ultrix_sys_statfs, do_sys_mount, fss_create_files (3 of 4),
adosfs_mount, cd9660_mount, coda_ioctl, coda_mount, ext2fs_mount,
ffs_mount, filecore_mount, hfs_mount, lfs_mount, msdosfs_mount,
ntfs_mount, sysvbfs_mount, udf_mount, union_mount, sys_chflags,
sys_lchflags, sys_chmod, sys_lchmod, sys_chown, sys_lchown,
sys___posix_chown, sys___posix_lchown, sys_link, do_sys_pstatvfs,
sys_quotactl, sys_revoke, sys_truncate, do_sys_utimes, sys_extattrctl,
sys_extattr_set_file, sys_extattr_set_link, sys_extattr_get_file,
sys_extattr_get_link, sys_extattr_delete_file,
sys_extattr_delete_link, sys_extattr_list_file, sys_extattr_list_link,
sys_setxattr, sys_lsetxattr, sys_getxattr, sys_lgetxattr,
sys_listxattr, sys_llistxattr, sys_removexattr, sys_lremovexattr

All have been scrutinized (several times, in fact) and compile-tested,
but not all have been explicitly tested in action.

XXX: While I haven't (intentionally) changed the use or nonuse of
XXX: TRYEMULROOT in any of these places, I'm not convinced all the
XXX: uses are correct; an audit might be desirable.
 1.68  11-Jan-2009  christos branches: 1.68.2;
merge christos-time_t
 1.67  30-Dec-2008  pooka #ifdef _LKM -> #ifndef _KERNEL_OPT
 1.66  10-May-2008  rumble branches: 1.66.6; 1.66.8; 1.66.10; 1.66.18; 1.66.22;
Convert file systems to dynamically attach with the new module interface.
Make VFS hooks dynamic while we're here and say farewell to VFS_ATTACH and
VFS_HOOKS_ATTACH linksets.

As a consequence, most of the file systems can now be loaded as new style
modules.

Quick sanity check by ad@.
 1.65  29-Apr-2008  ad branches: 1.65.2;
PR kern/38057 ffs makes assuptions about devvp file system
PR kern/33406 softdeps get stuck in endless loop

Introduce VFS_FSYNC() and call it when syncing a block device, if it
has a mounted file system.
 1.64  28-Jan-2008  dholland branches: 1.64.6; 1.64.8; 1.64.10;
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.
 1.63  15-Jan-2008  ad Use vp->v_rdev, don't look at the union.
 1.62  08-Dec-2007  pooka branches: 1.62.4;
Remove cn_lwp from struct componentname. curlwp should be used
from on. The NDINIT() macro no longer takes the lwp parameter and
associates the credentials of the calling thread with the namei
structure.
 1.61  01-Dec-2007  dsl branches: 1.61.2;
Ensure the mount data is a 0-terminated string - otherwise namei() might
process garbage (or unmapped addresses).
 1.60  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
 1.59  10-Oct-2007  ad branches: 1.59.4;
Merge from vmlocking:

- Split vnode::v_flag into three fields, depending on field locking.
- simple_lock -> kmutex in a few places.
- Fix some simple locking problems.
 1.58  31-Jul-2007  pooka branches: 1.58.2; 1.58.4; 1.58.6; 1.58.8;
* nuke the nameidata parameter from VFS_MOUNT(). Nobody on tech-kern
knew what it was supposed to be used for and wrstuden gave a go-ahead
* while rototilling, convert file systems which went easily to
use VFS_PROTOS() instead of manually prototyping the methods
 1.57  26-Jul-2007  pooka Use eopnotsupp() instead of vfs_stdsuspendctl() and retire the latter.
 1.56  17-Jul-2007  pooka branches: 1.56.2;
Make set_statvfs_info() take a parameter for the vfs name instead
of always retrieving it from mp->mnt_op->vfs_name

christos ok
 1.55  12-Jul-2007  dsl Update coda for VFS_MOUNT() change
 1.54  19-Jan-2007  hannken branches: 1.54.6;
New file system suspension API to replace vn_start_write and vn_finished_write.
The suspension helpers are now put into file system specific operations.
This means every file system not supporting these helpers cannot be suspended
and therefore snapshots are no longer possible.

Implemented for file systems of type ffs.

The new API is enabled on a kernel option NEWVNGATE. This option is
not enabled by default in any kernel config.

Presented and discussed on tech-kern with much input from
Bill Studenmund <wrstuden@netbsd.org> and YAMAMOTO Takashi <yamt@netbsd.org>.

Welcome to 4.99.9 (new vfs op vfs_suspendctl).
 1.53  09-Dec-2006  chs a smorgasbord of improvements to vnode locking and path lookup:
- LOCKPARENT is no longer relevant for lookup(), relookup() or VOP_LOOKUP().
these now always return the parent vnode locked. namei() works as before.
lookup() and various other paths no longer acquire vnode locks in the
wrong order via vrele(). fixes PR 32535.
as a nice side effect, path lookup is also up to 25% faster.
- the above allows us to get rid of PDIRUNLOCK.
- also get rid of WANTPARENT (just use LOCKPARENT and unlock it).
- remove an assumption in layer_node_find() that all file systems implement
a recursive VOP_LOCK() (unionfs doesn't).
- require that all file systems supply vfs_vptofh and vfs_fhtovp routines.
fill in eopnotsupp() for file systems that don't support being exported
and remove the checks for NULL. (layerfs calls these without checking.)
- in union_lookup1(), don't change refcounts in the ISDOTDOT case, just
adjust which vnode is locked. fixes PR 33374.
- apply fixes for ufs_rename() from ufs_vnops.c rev. 1.61 to ext2fs_rename().
 1.52  16-Nov-2006  christos branches: 1.52.2;
__unused removal on arguments; approved by core.
 1.51  12-Oct-2006  christos - sprinkle __unused on function decls.
- fix a couple of unused bugs
- no more -Wno-unused for i386
 1.50  29-Aug-2006  christos branches: 1.50.2; 1.50.4;
fix incomplete initializer
 1.49  21-Jul-2006  ad - Use the LWP cached credentials where sane.
- Minor cosmetic changes.
 1.48  14-May-2006  elad integrate kauth.
 1.47  11-Dec-2005  christos branches: 1.47.4; 1.47.6; 1.47.8; 1.47.10; 1.47.12;
merge ktrace-lwp.
 1.46  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.
 1.45  30-Aug-2005  xtraeme * Remove __P()
* Use ANSI function declarations
 1.44  02-Jul-2005  blymn branches: 1.44.2;
Add attach call so coda gets added to list of vfs supported by the kernel.
 1.43  29-May-2005  christos - sprinkle const
- avoid shadowed variables.
 1.42  26-Feb-2005  perry nuke trailing whitespace
 1.41  02-Jan-2005  thorpej branches: 1.41.2; 1.41.4;
Add the system call and VFS infrastructure for file system extended
attributes.

From FreeBSD.
 1.40  15-Oct-2004  skrll Revert previous. set_statvfs_info needs the struct proc * arg.

Problem noted by Tom Ivar Helbekkmo on current-users
 1.39  17-Sep-2004  skrll There's no need to pass a proc value when using UIO_SYSSPACE with
vn_rdwr(9) and uiomove(9).

OK'd by Jason Thorpe
 1.38  25-May-2004  hannken Add ffs internal snapshots. Written by Marshall Kirk McKusick for FreeBSD.

- Not enabled by default. Needs kernel option FFS_SNAPSHOT.
- Change parameters of ffs_blkfree.
- Let the copy-on-write functions return an error so spec_strategy
may fail if the copy-on-write fails.
- Change genfs_*lock*() to use vp->v_vnlock instead of &vp->v_lock.
- Add flag B_METAONLY to VOP_BALLOC to return indirect block buffer.
- Add a function ffs_checkfreefile needed for snapshot creation.
- Add special handling of snapshot files:
Snapshots may not be opened for writing and the attributes are read-only.
Use the mtime as the time this snapshot was taken.
Deny mtime updates for snapshot files.
- Add function transferlockers to transfer any waiting processes from
one lock to another.
- Add vfsop VFS_SNAPSHOT to take a snapshot and make it accessible through
a vnode.
- Add snapshot support to ls, fsck_ffs and dump.

Welcome to 2.0F.

Approved by: Jason R. Thorpe <thorpej@netbsd.org>
 1.37  25-May-2004  atatat Sysctl descriptions under vfs subtree
 1.36  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.
 1.35  21-Apr-2004  christos add sys/dirent.h
 1.34  21-Apr-2004  christos Replace the statfs() family of system calls with statvfs().
Retain binary compatibility.
 1.33  24-Mar-2004  atatat branches: 1.33.2;
Tango on sysctl_createv() and flags. The flags have all been renamed,
and sysctl_createv() now uses more arguments.
 1.32  09-Mar-2004  atatat Fix spelling of "orphan" and placement of */
 1.31  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.
 1.30  30-Oct-2003  simonb Remove some assigned-to but otherwise unused variables.
 1.29  27-Aug-2003  drochner update for the protocol used by coda>=6,
patches supplied by the coda-6.0.2 distribution,
with small changes to support the old protocol optionally
(options CODA_COMPAT_5)
 1.28  25-Aug-2003  drochner fix a deadlock during mount:
The client manager (venus) blocks in sys_mount() before entering its
event loop answering requests from the kernel device (cfs). sys_mount()
calls VFS_STATFS() internally which caused an upcall through cfs,
which was never answered.
Now don't consider the fs fully mounted before the VFS_START() was
called at the vey end of sys_mount(). So VFS_STATFS() will return
an error which is ignored.
 1.27  25-Aug-2003  drochner nuke an over-zealous memset() which broke statfs() et al. completely
 1.26  29-Jun-2003  fvdl branches: 1.26.2;
Back out the lwp/ktrace changes. They contained a lot of colateral damage,
and need to be examined and discussed more.
 1.25  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.
 1.24  29-Jun-2003  thorpej Adjust for ktrace/lwp changes.
 1.23  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
 1.22  16-Apr-2003  christos PR/1796: John Kohl: statfs misbehaves under chrooted environments.

- Under chroot it displays only the visible filesystems with appropriate paths.
- The statfs f_mntonname gets adjusted to contain the real path from root.
- While was there, fixed a bug in ext2fs, locking problems with vfs_getfsstat(),
and factored out some of the vfsop statfs() code to copy_statfs_info(). This
fixes the problem where some filesystems forgot to set fsid.
- Made coda look more like a normal fs.
 1.21  01-Feb-2003  thorpej Add extensible malloc types, adapted from FreeBSD. This turns
malloc types into a structure, a pointer to which is passed around,
instead of an int constant. Allow the limit to be adjusted when the
malloc type is defined, or with a function call, as suggested by
Jonathan Stone.
 1.20  26-Dec-2002  jdolecek coda_nc_initialized is not used here, remove local extern defition
 1.19  21-Sep-2002  christos branches: 1.19.2;
MNT_GETARGS support
 1.18  06-Sep-2002  gehenna Merge the gehenna-devsw branch into the trunk.

This merge changes the device switch tables from static array to
dynamically generated by config(8).

- All device switches is defined as a constant structure in device drivers.

- The new grammer ``device-major'' is introduced to ``files''.

device-major <prefix> char <num> [block <num>] [<rules>]

- All device major numbers must be listed up in port dependent majors.<arch>
by using this grammer.

- Added the new naming convention.
The name of the device switch must be <prefix>_[bc]devsw for auto-generation
of device switch tables.

- The backward compatibility of loading block/character device
switch by LKM framework is broken. This is necessary to convert
from block/character device major to device name in runtime and vice versa.

- The restriction to assign device major by LKM is completely removed.
We don't need to reserve LKM entries for dynamic loading of device switch.

- In compile time, device major numbers list is packed into the kernel and
the LKM framework will refer it to assign device major number dynamically.
 1.17  30-Jul-2002  soren Die, qaddr_t, die! - mnt_data in struct mount is already effectively
a void *, so stop pretending otherwise.
 1.16  27-Mar-2002  phil branches: 1.16.2;
Add the statfs upcall so df now reports cache size and usage.
 1.15  23-Nov-2001  perry __FUNCTION__ -> __func__
 1.14  12-Nov-2001  lukem add RCSIDs
 1.13  15-Sep-2001  chs add a new VFS op, vfs_reinit, which is called when desiredvnodes is
adjusted via sysctl. file systems that have hash tables which are
sized based on the value of this variable now resize those hash tables
using the new value. the max number of FFS softdeps is also recalculated.

convert various file systems to use the <sys/queue.h> macros for
their hash tables.
 1.12  18-Jul-2001  thorpej branches: 1.12.2;
bzero -> memset
 1.11  22-Jan-2001  jdolecek branches: 1.11.2; 1.11.4;
make filesystem vnodeop, specop, fifoop and vnodeopv_* arrays const
 1.10  30-Mar-2000  augustss Kill register declarations.
 1.9  16-Mar-2000  jdolecek 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.
 1.8  17-Oct-1999  cgd branches: 1.8.2;
nuke RCS "Log" tags. They cause problems for third parties importing
our sources, and for NetBSD release engineering folks. (They've
been against the NetBSD coding style forever, but they crept in anyway.)
 1.7  26-Feb-1999  wrstuden branches: 1.7.8;
Modify vfsops to seperate vfs_fhtovp() into two routines. vfs_fhtovp() now
only handles the file handle to vnode conversion, and a new call,
vfs_checkexp(), performs the export verification.
 1.6  10-Dec-1998  rvb Commit a couple of old fixes
 1.5  25-Sep-1998  rvb Conditionalize "stray" printouts under DIAGNOSTIC and DEBUG.
Make files compile if DEBUG is on (from Alan Barrett). Finally,
make coda an lkm.
 1.4  15-Sep-1998  rvb Final piece of rename cfs->coda
 1.3  12-Sep-1998  rvb Change cfs/CFS in symbols, strings and constants to coda/CODA
to avoid fs conflicts.
 1.2  08-Sep-1998  rvb Pass2 complete
 1.1  29-Aug-1998  rvb branches: 1.1.1;
Initial revision
 1.1.1.1  29-Aug-1998  rvb Very Preliminary Coda
 1.7.8.1  27-Dec-1999  wrstuden Pull up to last week's -current.
 1.8.2.2  11-Feb-2001  bouyer Sync with HEAD.
 1.8.2.1  20-Nov-2000  bouyer Update thorpej_scsipi to -current as of a month ago
 1.11.4.5  10-Oct-2002  jdolecek sync kqueue with -current; this includes merge of gehenna-devsw branch,
merge of i386 MP branch, and part of autoconf rototil work
 1.11.4.4  06-Sep-2002  jdolecek sync kqueue branch with HEAD
 1.11.4.3  23-Jun-2002  jdolecek catch up with -current on kqueue branch
 1.11.4.2  10-Jan-2002  thorpej Sync kqueue branch with -current.
 1.11.4.1  03-Aug-2001  lukem update to -current
 1.11.2.11  29-Dec-2002  thorpej Sync with HEAD.
 1.11.2.10  18-Oct-2002  nathanw Catch up to -current.
 1.11.2.9  17-Sep-2002  nathanw Catch up to -current.
 1.11.2.8  01-Aug-2002  nathanw Catch up to -current.
 1.11.2.7  24-Jun-2002  nathanw Curproc->curlwp renaming.

Change uses of "curproc->l_proc" back to "curproc", which is more like the
original use. Bare uses of "curproc" are now "curlwp".

"curproc" is now #defined in proc.h as ((curlwp) ? (curlwp)->l_proc) : NULL)
so that it is always safe to reference curproc (*de*referencing curproc
is another story, but that's always been true).
 1.11.2.6  01-Apr-2002  nathanw Catch up to -current.
(CVS: It's not just a program. It's an adventure!)
 1.11.2.5  08-Jan-2002  nathanw Catch up to -current.
 1.11.2.4  14-Nov-2001  nathanw Catch up to -current.
 1.11.2.3  21-Sep-2001  nathanw Catch up to -current.
 1.11.2.2  24-Aug-2001  nathanw Catch up with -current.
 1.11.2.1  05-Mar-2001  nathanw Initial commit of scheduler activations and lightweight process support.
 1.12.2.2  01-Oct-2001  fvdl Catch up with -current.
 1.12.2.1  07-Sep-2001  thorpej Commit my "devvp" changes to the thorpej-devvp branch. This
replaces the use of dev_t in most places with a struct vnode *.

This will form the basic infrastructure for real cloning device
support (besides being architecurally cleaner -- it'll be good
to get away from using numbers to represent objects).
 1.16.2.2  29-Aug-2002  gehenna catch up with -current.
 1.16.2.1  16-May-2002  gehenna Replace the direct-access to devsw table with calling devsw API.
 1.19.2.1  18-Dec-2002  gmcgarry Merge pcred and ucred, and poolify. TBD: check backward compatibility
and factor-out some higher-level functionality.
 1.26.2.11  10-Nov-2005  skrll Sync with HEAD. Here we go again...
 1.26.2.10  04-Mar-2005  skrll Sync with HEAD.

Hi Perry!
 1.26.2.9  17-Jan-2005  skrll Sync with HEAD.
 1.26.2.8  24-Oct-2004  skrll Reduce diff to HEAD
 1.26.2.7  19-Oct-2004  skrll Sync with HEAD
 1.26.2.6  21-Sep-2004  skrll Fix the sync with head I botched.
 1.26.2.5  18-Sep-2004  skrll Sync with HEAD.
 1.26.2.4  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.
 1.26.2.3  03-Aug-2004  skrll Sync with HEAD
 1.26.2.2  19-Aug-2003  skrll LWPify
 1.26.2.1  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.
 1.33.2.1  29-May-2004  tron Pull up revision 1.37 (requested by atatat in ticket #393):
Sysctl descriptions under vfs subtree
 1.41.4.1  19-Mar-2005  yamt sync with head. xen and whitespace. xen part is not finished.
 1.41.2.1  29-Apr-2005  kent sync with -current
 1.44.2.8  04-Feb-2008  yamt sync with head.
 1.44.2.7  21-Jan-2008  yamt sync with head
 1.44.2.6  07-Dec-2007  yamt sync with head
 1.44.2.5  27-Oct-2007  yamt sync with head.
 1.44.2.4  03-Sep-2007  yamt sync with head.
 1.44.2.3  26-Feb-2007  yamt sync with head.
 1.44.2.2  30-Dec-2006  yamt sync with head.
 1.44.2.1  21-Jun-2006  yamt sync with head.
 1.47.12.1  24-May-2006  tron Merge 2006-05-24 NetBSD-current into the "peter-altq" branch.
 1.47.10.2  06-May-2006  christos - Move kauth_cred_t declaration to <sys/types.h>
- Cleanup struct ucred; forward declarations that are unused.
- Don't include <sys/kauth.h> in any header, but include it in the c files
that need it.

Approved by core.
 1.47.10.1  08-Mar-2006  elad Adapt to kernel authorization KPI.
 1.47.8.3  03-Sep-2006  yamt sync with head.
 1.47.8.2  11-Aug-2006  yamt sync with head
 1.47.8.1  24-May-2006  yamt sync with head.
 1.47.6.1  01-Jun-2006  kardel Sync with head.
 1.47.4.1  09-Sep-2006  rpaulo sync with head
 1.50.4.2  10-Dec-2006  yamt sync with head.
 1.50.4.1  22-Oct-2006  yamt sync with head
 1.50.2.3  01-Feb-2007  ad Sync with head.
 1.50.2.2  12-Jan-2007  ad Sync with head.
 1.50.2.1  18-Nov-2006  ad Sync with head.
 1.52.2.1  17-Feb-2007  tron Apply patch (requested by chs in ticket #422):
- Fix various deadlock problems with nullfs and unionfs.
- Speed up path lookups by upto 25%.
 1.54.6.3  20-Aug-2007  ad Sync with HEAD.
 1.54.6.2  15-Jul-2007  ad Sync with head.
 1.54.6.1  17-Jun-2007  ad - Increase the number of thread priorities from 128 to 256. How the space
is set up is to be revisited.
- Implement soft interrupts as kernel threads. A generic implementation
is provided, with hooks for fast-path MD code that can run the interrupt
threads over the top of other threads executing in the kernel.
- Split vnode::v_flag into three fields, depending on how the flag is
locked (by the interlock, by the vnode lock, by the file system).
- Miscellaneous locking fixes and improvements.
 1.56.2.1  15-Aug-2007  skrll Sync with HEAD.
 1.58.8.2  31-Jul-2007  pooka * nuke the nameidata parameter from VFS_MOUNT(). Nobody on tech-kern
knew what it was supposed to be used for and wrstuden gave a go-ahead
* while rototilling, convert file systems which went easily to
use VFS_PROTOS() instead of manually prototyping the methods
 1.58.8.1  31-Jul-2007  pooka file coda_vfsops.c was added on branch matt-mips64 on 2007-07-31 21:14:20 +0000
 1.58.6.1  14-Oct-2007  yamt sync with head.
 1.58.4.3  23-Mar-2008  matt sync with HEAD
 1.58.4.2  09-Jan-2008  matt sync with HEAD
 1.58.4.1  06-Nov-2007  matt sync with HEAD
 1.58.2.4  09-Dec-2007  jmcneill Sync with HEAD.
 1.58.2.3  03-Dec-2007  joerg Sync with HEAD.
 1.58.2.2  27-Nov-2007  joerg Sync with HEAD. amd64 Xen support needs testing.
 1.58.2.1  26-Oct-2007  joerg Sync with HEAD.

Follow the merge of pmap.c on i386 and amd64 and move
pmap_init_tmp_pgtbl into arch/x86/x86/pmap.c. Modify the ACPI wakeup
code to restore CR4 before jumping back into kernel space as the large
page option might cover that.
 1.59.4.3  18-Feb-2008  mjf Sync with HEAD.
 1.59.4.2  27-Dec-2007  mjf Sync with HEAD.
 1.59.4.1  08-Dec-2007  mjf Sync with HEAD.
 1.61.2.1  26-Dec-2007  ad Sync with head.
 1.62.4.1  19-Jan-2008  bouyer Sync with HEAD
 1.64.10.3  18-Jul-2009  yamt sync with head.
 1.64.10.2  04-May-2009  yamt sync with head.
 1.64.10.1  16-May-2008  yamt sync with head.
 1.64.8.1  18-May-2008  yamt sync with head.
 1.64.6.2  17-Jan-2009  mjf Sync with HEAD.
 1.64.6.1  02-Jun-2008  mjf Sync with HEAD.
 1.65.2.1  23-Jun-2008  wrstuden Sync w/ -current. 34 merge conflicts to follow.
 1.66.22.1  28-Apr-2014  sborrill Pull up the following revisions(s) (requested by maxv in ticket #1901):
sys/kern/vfs_syscalls.c: revision 1.478, 1.480 via patch
sys/coda/coda_vfsops.c: revision 1.81
sys/fs/adosfs/advfsops.c: revision 1.70
sys/fs/cd9660/cd9660_vfsops.c: revision 1.84
sys/fs/efs/efs_vfsops.c: revision 1.25
sys/fs/filecorefs/filecore_vfsops.c: revision 1.76
sys/fs/hfs/hfs_vfsops.c: revision 1.31
sys/fs/msdosfs/msdosfs_vfsops.c: revision 1.107
sys/fs/ntfs/ntfs_vfsops.c: revision 1.94
sys/fs/ptyfs/ptyfs_vfsops.c: revision 1.50 via patch
sys/fs/puffs/puffs_vfsops.c: revision 1.110 via patch
sys/fs/smbfs/smbfs_vfsops.c: revision 1.100
sys/fs/sysvbfs/sysvbfs_vfsops.c: revision 1.43
sys/fs/tmpfs/tmpfs_vfsops.c: revision 1.59 via patch
sys/fs/udf/udf_vfsops.c: revision 1.67
sys/fs/union/union_vfsops.c: revision 1.72
sys/fs/unionfs/unionfs_vfsops.c: revision 1.13
sys/kern/vfs_syscalls.c: revision 1.479
sys/miscfs/nullfs/null_vfsops.c: revision 1.88 via patch
sys/miscfs/overlay/overlay_vfsops.c: revision 1.61
sys/miscfs/procfs/procfs_vfsops.c: revision 1.91
sys/miscfs/umapfs/umap_vfsops.c: revision 1.92
sys/nfs/nfs_vfsops.c: revision 1.227
sys/ufs/ext2fs/ext2fs_vfsops.c: revision 1.180
sys/ufs/ffs/ffs_vfsops.c: revision 1.297
sys/ufs/lfs/lfs_vfsops.c: revision 1.321
sys/ufs/mfs/mfs_vfsops.c: revision 1.107

Due to missing checks in the mount syscall, and a wrong assumption on the
file systems side, the kernel could allocate an unbounded or zero-sized
memory buffer, and could dereference a NULL pointer when particular
arguments are given by a user.
 1.66.18.1  28-Apr-2014  sborrill Pull up the following revisions(s) (requested by maxv in ticket #1901):
sys/kern/vfs_syscalls.c: revision 1.478, 1.480 via patch
sys/coda/coda_vfsops.c: revision 1.81
sys/fs/adosfs/advfsops.c: revision 1.70
sys/fs/cd9660/cd9660_vfsops.c: revision 1.84
sys/fs/efs/efs_vfsops.c: revision 1.25
sys/fs/filecorefs/filecore_vfsops.c: revision 1.76
sys/fs/hfs/hfs_vfsops.c: revision 1.31
sys/fs/msdosfs/msdosfs_vfsops.c: revision 1.107
sys/fs/ntfs/ntfs_vfsops.c: revision 1.94
sys/fs/ptyfs/ptyfs_vfsops.c: revision 1.50 via patch
sys/fs/puffs/puffs_vfsops.c: revision 1.110 via patch
sys/fs/smbfs/smbfs_vfsops.c: revision 1.100
sys/fs/sysvbfs/sysvbfs_vfsops.c: revision 1.43
sys/fs/tmpfs/tmpfs_vfsops.c: revision 1.59 via patch
sys/fs/udf/udf_vfsops.c: revision 1.67
sys/fs/union/union_vfsops.c: revision 1.72
sys/fs/unionfs/unionfs_vfsops.c: revision 1.13
sys/kern/vfs_syscalls.c: revision 1.479
sys/miscfs/nullfs/null_vfsops.c: revision 1.88 via patch
sys/miscfs/overlay/overlay_vfsops.c: revision 1.61
sys/miscfs/procfs/procfs_vfsops.c: revision 1.91
sys/miscfs/umapfs/umap_vfsops.c: revision 1.92
sys/nfs/nfs_vfsops.c: revision 1.227
sys/ufs/ext2fs/ext2fs_vfsops.c: revision 1.180
sys/ufs/ffs/ffs_vfsops.c: revision 1.297
sys/ufs/lfs/lfs_vfsops.c: revision 1.321
sys/ufs/mfs/mfs_vfsops.c: revision 1.107

Due to missing checks in the mount syscall, and a wrong assumption on the
file systems side, the kernel could allocate an unbounded or zero-sized
memory buffer, and could dereference a NULL pointer when particular
arguments are given by a user.
 1.66.10.3  30-Dec-2008  christos sync with head.
 1.66.10.2  09-Nov-2008  christos account for major and minor being unsigned long long
 1.66.10.1  10-May-2008  christos file coda_vfsops.c was added on branch christos-time_t on 2008-11-09 01:58:50 +0000
 1.66.8.1  25-Apr-2014  sborrill Pull up the following revisions(s) (requested by maxv in ticket #1901):
sys/kern/vfs_syscalls.c: revision 1.478, 1.480 via patch
sys/coda/coda_vfsops.c: revision 1.81
sys/fs/adosfs/advfsops.c: revision 1.70
sys/fs/cd9660/cd9660_vfsops.c: revision 1.84
sys/fs/efs/efs_vfsops.c: revision 1.25
sys/fs/filecorefs/filecore_vfsops.c: revision 1.76
sys/fs/hfs/hfs_vfsops.c: revision 1.31
sys/fs/msdosfs/msdosfs_vfsops.c: revision 1.107
sys/fs/ntfs/ntfs_vfsops.c: revision 1.94
sys/fs/ptyfs/ptyfs_vfsops.c: revision 1.50 via patch
sys/fs/puffs/puffs_vfsops.c: revision 1.110 via patch
sys/fs/smbfs/smbfs_vfsops.c: revision 1.100
sys/fs/sysvbfs/sysvbfs_vfsops.c: revision 1.43
sys/fs/tmpfs/tmpfs_vfsops.c: revision 1.59 via patch
sys/fs/udf/udf_vfsops.c: revision 1.67
sys/fs/union/union_vfsops.c: revision 1.72
sys/fs/unionfs/unionfs_vfsops.c: revision 1.13
sys/kern/vfs_syscalls.c: revision 1.479
sys/miscfs/nullfs/null_vfsops.c: revision 1.88 via patch
sys/miscfs/overlay/overlay_vfsops.c: revision 1.61
sys/miscfs/procfs/procfs_vfsops.c: revision 1.91
sys/miscfs/umapfs/umap_vfsops.c: revision 1.92
sys/nfs/nfs_vfsops.c: revision 1.227
sys/ufs/ext2fs/ext2fs_vfsops.c: revision 1.180
sys/ufs/ffs/ffs_vfsops.c: revision 1.297
sys/ufs/lfs/lfs_vfsops.c: revision 1.321
sys/ufs/mfs/mfs_vfsops.c: revision 1.107

Due to missing checks in the mount syscall, and a wrong assumption on the
file systems side, the kernel could allocate an unbounded or zero-sized
memory buffer, and could dereference a NULL pointer when particular
arguments are given by a user.
 1.66.6.1  19-Jan-2009  skrll Sync with HEAD.
 1.68.2.1  23-Jul-2009  jym Sync with HEAD.
 1.70.14.1  21-Apr-2014  bouyer Pull up following revision(s) (requested by maxv in ticket #1050):
sys/ufs/chfs/chfs_vfsops.c: revision 1.11
sys/fs/unionfs/unionfs_vfsops.c: revision 1.13
sys/fs/nilfs/nilfs_vfsops.c: revision 1.16
sys/ufs/mfs/mfs_vfsops.c: revision 1.107
sys/fs/sysvbfs/sysvbfs_vfsops.c: revision 1.43
sys/ufs/ffs/ffs_vfsops.c: revision 1.297
sys/kern/vfs_syscalls.c: revision 1.478
sys/kern/vfs_syscalls.c: revision 1.479
sys/fs/puffs/puffs_vfsops.c: revision 1.110
sys/fs/cd9660/cd9660_vfsops.c: revision 1.84
sys/nfs/nfs_vfsops.c: revision 1.227
sys/fs/v7fs/v7fs_vfsops.c: revision 1.10
sys/ufs/ext2fs/ext2fs_vfsops.c: revision 1.180
sys/miscfs/umapfs/umap_vfsops.c: revision 1.92
sys/fs/filecorefs/filecore_vfsops.c: revision 1.76
sys/miscfs/nullfs/null_vfsops.c: revision 1.88
sys/fs/ptyfs/ptyfs_vfsops.c: revision 1.50
sys/coda/coda_vfsops.c: revision 1.81
sys/ufs/lfs/lfs_vfsops.c: revision 1.321
sys/fs/tmpfs/tmpfs_vfsops.c: revision 1.59
sys/fs/hfs/hfs_vfsops.c: revision 1.31
sys/miscfs/overlay/overlay_vfsops.c: revision 1.61
sys/fs/union/union_vfsops.c: revision 1.72
sys/fs/ntfs/ntfs_vfsops.c: revision 1.94
sys/kern/vfs_syscalls.c: revision 1.480
sys/fs/efs/efs_vfsops.c: revision 1.25
sys/kern/vfs_syscalls.c: revision 1.482
sys/fs/msdosfs/msdosfs_vfsops.c: revision 1.107
external/cddl/osnet/dist/uts/common/fs/zfs/zfs_vfsops.c: revision 1.12
sys/miscfs/procfs/procfs_vfsops.c: revision 1.91
sys/fs/smbfs/smbfs_vfsops.c: revision 1.100
sys/fs/adosfs/advfsops.c: revision 1.70
sys/fs/udf/udf_vfsops.c: revision 1.67
Limit check for 'data_len'. Otherwise a (un)privileged user can easily
panic the system by passing a huge size.
ok christos@
An (un)privileged user can easily make the kernel dereference a NULL
pointer.
The kernel allows 'data' to be NULL; it's the fs's responsibility to
ensure that it isn't NULL (if the fs actually needs data).
ok christos@
Some fs's - like kernfs - set their vfs_min_mount_data to zero. Add a check
to prevent an (un)privileged user from requesting a zero-sized allocation
(and thus a panic).
This thing is totally buggy: 'data_len' is modified by the fs, so calling
kmem_free with it while its value has changed since the kmem_alloc is far
from being a good idea.
If the kernel figures out that something mismatches, it will panic
(typically with kernfs).
 1.70.12.1  21-Apr-2014  bouyer Pull up following revision(s) (requested by maxv in ticket #1050):
sys/ufs/chfs/chfs_vfsops.c: revision 1.11
sys/fs/unionfs/unionfs_vfsops.c: revision 1.13
sys/fs/nilfs/nilfs_vfsops.c: revision 1.16
sys/ufs/mfs/mfs_vfsops.c: revision 1.107
sys/fs/sysvbfs/sysvbfs_vfsops.c: revision 1.43
sys/ufs/ffs/ffs_vfsops.c: revision 1.297
sys/kern/vfs_syscalls.c: revision 1.478
sys/kern/vfs_syscalls.c: revision 1.479
sys/fs/puffs/puffs_vfsops.c: revision 1.110
sys/fs/cd9660/cd9660_vfsops.c: revision 1.84
sys/nfs/nfs_vfsops.c: revision 1.227
sys/fs/v7fs/v7fs_vfsops.c: revision 1.10
sys/ufs/ext2fs/ext2fs_vfsops.c: revision 1.180
sys/miscfs/umapfs/umap_vfsops.c: revision 1.92
sys/fs/filecorefs/filecore_vfsops.c: revision 1.76
sys/miscfs/nullfs/null_vfsops.c: revision 1.88
sys/fs/ptyfs/ptyfs_vfsops.c: revision 1.50
sys/coda/coda_vfsops.c: revision 1.81
sys/ufs/lfs/lfs_vfsops.c: revision 1.321
sys/fs/tmpfs/tmpfs_vfsops.c: revision 1.59
sys/fs/hfs/hfs_vfsops.c: revision 1.31
sys/miscfs/overlay/overlay_vfsops.c: revision 1.61
sys/fs/union/union_vfsops.c: revision 1.72
sys/fs/ntfs/ntfs_vfsops.c: revision 1.94
sys/kern/vfs_syscalls.c: revision 1.480
sys/fs/efs/efs_vfsops.c: revision 1.25
sys/kern/vfs_syscalls.c: revision 1.482
sys/fs/msdosfs/msdosfs_vfsops.c: revision 1.107
external/cddl/osnet/dist/uts/common/fs/zfs/zfs_vfsops.c: revision 1.12
sys/miscfs/procfs/procfs_vfsops.c: revision 1.91
sys/fs/smbfs/smbfs_vfsops.c: revision 1.100
sys/fs/adosfs/advfsops.c: revision 1.70
sys/fs/udf/udf_vfsops.c: revision 1.67
Limit check for 'data_len'. Otherwise a (un)privileged user can easily
panic the system by passing a huge size.
ok christos@
An (un)privileged user can easily make the kernel dereference a NULL
pointer.
The kernel allows 'data' to be NULL; it's the fs's responsibility to
ensure that it isn't NULL (if the fs actually needs data).
ok christos@
Some fs's - like kernfs - set their vfs_min_mount_data to zero. Add a check
to prevent an (un)privileged user from requesting a zero-sized allocation
(and thus a panic).
This thing is totally buggy: 'data_len' is modified by the fs, so calling
kmem_free with it while its value has changed since the kmem_alloc is far
from being a good idea.
If the kernel figures out that something mismatches, it will panic
(typically with kernfs).
 1.70.8.1  21-Apr-2014  bouyer Pull up following revision(s) (requested by maxv in ticket #1050):
sys/ufs/chfs/chfs_vfsops.c: revision 1.11
sys/fs/unionfs/unionfs_vfsops.c: revision 1.13
sys/fs/nilfs/nilfs_vfsops.c: revision 1.16
sys/ufs/mfs/mfs_vfsops.c: revision 1.107
sys/fs/sysvbfs/sysvbfs_vfsops.c: revision 1.43
sys/ufs/ffs/ffs_vfsops.c: revision 1.297
sys/kern/vfs_syscalls.c: revision 1.478
sys/kern/vfs_syscalls.c: revision 1.479
sys/fs/puffs/puffs_vfsops.c: revision 1.110
sys/fs/cd9660/cd9660_vfsops.c: revision 1.84
sys/nfs/nfs_vfsops.c: revision 1.227
sys/fs/v7fs/v7fs_vfsops.c: revision 1.10
sys/ufs/ext2fs/ext2fs_vfsops.c: revision 1.180
sys/miscfs/umapfs/umap_vfsops.c: revision 1.92
sys/fs/filecorefs/filecore_vfsops.c: revision 1.76
sys/miscfs/nullfs/null_vfsops.c: revision 1.88
sys/fs/ptyfs/ptyfs_vfsops.c: revision 1.50
sys/coda/coda_vfsops.c: revision 1.81
sys/ufs/lfs/lfs_vfsops.c: revision 1.321
sys/fs/tmpfs/tmpfs_vfsops.c: revision 1.59
sys/fs/hfs/hfs_vfsops.c: revision 1.31
sys/miscfs/overlay/overlay_vfsops.c: revision 1.61
sys/fs/union/union_vfsops.c: revision 1.72
sys/fs/ntfs/ntfs_vfsops.c: revision 1.94
sys/kern/vfs_syscalls.c: revision 1.480
sys/fs/efs/efs_vfsops.c: revision 1.25
sys/kern/vfs_syscalls.c: revision 1.482
sys/fs/msdosfs/msdosfs_vfsops.c: revision 1.107
external/cddl/osnet/dist/uts/common/fs/zfs/zfs_vfsops.c: revision 1.12
sys/miscfs/procfs/procfs_vfsops.c: revision 1.91
sys/fs/smbfs/smbfs_vfsops.c: revision 1.100
sys/fs/adosfs/advfsops.c: revision 1.70
sys/fs/udf/udf_vfsops.c: revision 1.67
Limit check for 'data_len'. Otherwise a (un)privileged user can easily
panic the system by passing a huge size.
ok christos@
An (un)privileged user can easily make the kernel dereference a NULL
pointer.
The kernel allows 'data' to be NULL; it's the fs's responsibility to
ensure that it isn't NULL (if the fs actually needs data).
ok christos@
Some fs's - like kernfs - set their vfs_min_mount_data to zero. Add a check
to prevent an (un)privileged user from requesting a zero-sized allocation
(and thus a panic).
This thing is totally buggy: 'data_len' is modified by the fs, so calling
kmem_free with it while its value has changed since the kmem_alloc is far
from being a good idea.
If the kernel figures out that something mismatches, it will panic
(typically with kernfs).
 1.70.6.2  02-Jun-2012  mrg sync to latest -current.
 1.70.6.1  29-Apr-2012  mrg sync to latest -current.
 1.70.2.3  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")
 1.70.2.2  30-Oct-2012  yamt sync with head
 1.70.2.1  23-May-2012  yamt sync with head.
 1.74.4.1  18-May-2014  rmind sync with head
 1.74.2.2  03-Dec-2017  jdolecek update from HEAD
 1.74.2.1  20-Aug-2014  tls Rebase to HEAD as of a few days ago.
 1.80.2.1  10-Aug-2014  tls Rebase.
 1.81.4.2  28-Aug-2017  skrll Sync with HEAD
 1.81.4.1  06-Apr-2015  skrll Sync with HEAD
 1.84.4.1  21-Apr-2017  bouyer Sync with HEAD
 1.84.2.3  26-Apr-2017  pgoyette Sync with HEAD
 1.84.2.2  20-Mar-2017  pgoyette Sync with HEAD
 1.84.2.1  20-Jul-2016  pgoyette Adapt machine-independant code to the new {b,c}devsw reference-counting
(using localcount(9)). All callers of {b,c}devsw_lookup() now call
{b,c}devsw_lookup_acquire() which retains a reference on the 'struct
{b,c}devsw'. This reference must be released by the caller once it is
finished with the structure's content (or other data that would disappear
if the 'struct {b,c}devsw' were to disappear).
 1.86.20.1  17-Jan-2020  ad Sync with head.
 1.86.14.1  08-Apr-2020  martin Merge changes from current as of 20200406
 1.86.4.1  27-Apr-2017  pgoyette Restore all work from the former pgoyette-localcount branch (which is
now abandoned doe to cvs merge botch).

The branch now builds, and installs via anita. There are still some
problems (cgd is non-functional and all atf tests time-out) but they
will get resolved soon.
 1.87.6.1  14-Dec-2020  thorpej Sync w/ HEAD.

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