Remove cruft. Update to current reality.

branches: 1.6.18; 1.6.56; 1.6.60; 1.6.62;
insert newlines to the MAKEDEV section, so that it's more clear
what part is MAKEDEV coda and what text

update to post gehenna-devsw world

branches: 1.4.6;
Fix doubled 'the's in comments.

branches: 1.3.2;
Update 00READ with porting instructions

branches: 1.2.12;
Pass2 complete

branches: 1.1.1;
Initial revision

mention current status

branches: 1.3.70;
Remove cruft. Update to current reality.

branches: 1.2.62; 1.2.100; 1.2.104; 1.2.106;
Pass2 complete

branches: 1.1.1;
Initial revision

Remove cruft. Update to current reality.

branches: 1.3.14; 1.3.18; 1.3.20;
Update list of todo items, and note that old items are from 1998 and
thus likely no longer correct.

branches: 1.2.62; 1.2.76; 1.2.78; 1.2.80; 1.2.82; 1.2.84;
Pass2 complete

branches: 1.1.1;
Initial revision

<sys/mallocvar.h> -> <sys/malloc.h>

Change coda from hashlist to vcache.
- Replace all hash list crawlers with vfs_vnode_iterator.

Remove unused definitions (C_WANTED, C_LOCKED).

branches: 1.18.2; 1.18.16;
remove variable names from prototypes.

branches: 1.17.38; 1.17.42;
convert more insque/remque style queuing to use a queue(3) TAILQ,
this necessitates using a flag to indicate vc_open instead of abusing
the queue pointer but apart from that there is no functional
difference.

branches: 1.16.36;
Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

branches: 1.15.26;
merge ktrace-lwp.

branches: 1.14.4;
nuke trailing whitespace

branches: 1.13.8; 1.13.10;
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)

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.

branches: 1.11.2;
protect <sys/mallocvar.h> ifdef _KERNEL

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.

/*CONTCOND*/ while (0)'ed macros

add a VTOC macro that doesn't cast, and fix a spurious lvalue cast with it.

branches: 1.7.12; 1.7.14;
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.)

branches: 1.6.2;
Bump osrelease to 1.4E. Add layerfs files, remove null_subr.c.

Update coda to new struct lock in struct vnode.

make fdescfs, kernfs, portalfs, and procfs actually lock their vnodes.
It's not that hard.

Make unionfs set v_vnlock = NULL so any overlayed fs will call its
VOP_LOCK.

branches: 1.5.6;
Lookup now passes up an extra flag. But old veni will
be ok; new veni will check /dev/cfs0 to make sure that a new
kernel is running.
Also, a bug in vc_nb_close iff CODA_SIGNAL's were seen has been
fixed.

Final piece of rename cfs->coda

Change cfs/CFS in symbols, strings and constants to coda/CODA
to avoid fs conflicts.

Pass2 complete

branches: 1.1.1;
Initial revision

Rewrite coda_readdir() to directly process the container file.

Passing this operation down to the file system holding the container
cannot work for anything but UFS and UFS doesn't allow reading
directory from a plain file since ~2015.

Fixes PR kern/55775 Coda client, its in-kernel part, opens wrong files ...

branches: 1.20.6; 1.20.14;
s/static inline/static __inline/g for consistency.

branches: 1.19.10; 1.19.16;
More on PR 41200: headers that declare ioctls should include sys/ioccom.h.
This covers (I think) all the MI headers outside of external/ (and dist/).

Move the definition of NVCODA and CODA_COMPAT_5 to coda.h,
remove them from coda_vfsops.c and coda_psdev.c.

branches: 1.17.18; 1.17.36;
Fix incorrect comments about the buffer size being 2K; it is really 8K now.
From Robert Watson.

Correct incomplete size checks for the coda ioctls. From Dan Rosenberg.

branches: 1.15.2; 1.15.4;
Make file_id unsigned so it does not get sign extended when promoted
to a 64bit ino_t.

branches: 1.14.40; 1.14.52; 1.14.58; 1.14.60;
Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

branches: 1.13.18; 1.13.20; 1.13.28;
Change type of 'inode' member of struct coda_open_out to ino_t. This
holds a host system inode denoting a container file, not a coda inode
type. Tested with CVS coda on i386. Reviewed by christos@.

branches: 1.12.4; 1.12.6;
__inline__ -> inline

merge ktrace-lwp.

coda inodes are still 32 bits. Don't use ino_t in coda_open_out.

branches: 1.9.4;
nuke trailing whitespace

branches: 1.8.8; 1.8.10;
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)

branches: 1.7.10;
Add the statfs upcall so df now reports cache size and usage.

branches: 1.6.22; 1.6.24;
Lookup now passes up an extra flag. But old veni will
be ok; new veni will check /dev/cfs0 to make sure that a new
kernel is running.
Also, a bug in vc_nb_close iff CODA_SIGNAL's were seen has been
fixed.

Venus must be passed O_CREAT flag on VOP_OPEN iff this is
a creat so that we can will allow a mode 444 file to be
written into. Sync with the latest coda.h and deal with
collateral damage.

Final piece of rename cfs->coda

Change cfs/CFS in symbols, strings and constants to coda/CODA
to avoid fs conflicts.

Pass2 complete

branches: 1.1.1;
Initial revision

Pass2 complete

branches: 1.1.1;
Initial revision

More on PR 41200: headers that declare ioctls should include sys/ioccom.h.
This covers (I think) all the MI headers outside of external/ (and dist/).

branches: 1.7.120; 1.7.140;
merge ktrace-lwp.

nuke trailing whitespace

branches: 1.5.34; 1.5.42; 1.5.44;
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.)

branches: 1.4.12;
Final piece of rename cfs->coda

Change cfs/CFS in symbols, strings and constants to coda/CODA
to avoid fs conflicts.

Pass2 complete

branches: 1.1.1;
Initial revision

convert more insque/remque style queuing to use a queue(3) TAILQ,
this necessitates using a flag to indicate vc_open instead of abusing
the queue pointer but apart from that there is no functional
difference.

branches: 1.6.70;
merge ktrace-lwp.

branches: 1.5.4;
nuke trailing whitespace

branches: 1.4.6; 1.4.14; 1.4.16;
/*CONTCOND*/ while (0)'ed macros

branches: 1.3.24;
Final piece of rename cfs->coda

Pass2 complete

branches: 1.1.1;
Initial revision

Remove unnecessary include of <sys/malloc.h>.

fix spelling mistakes, mainly in comments and log messages.

s/auxillary/auxiliary/ in comments.

Replace most uses of vp->v_usecount with a call to vrefcnt(vp), a function
that hides the details and does atomic_load_relaxed(). Signature matches
FreeBSD.

branches: 1.26.20; 1.26.30;
src is too big these days to tolerate superfluous apostrophes. It's
"its", people!

branches: 1.25.2;
- 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.

branches: 1.24.12;
Remove extra whitespace added by a stupid tool.
XXX: more in src/sys/arch

bcopy -> memcpy

branches: 1.22.18; 1.22.26; 1.22.32;
convert usage of insque/remque to queue(3) macros

branches: 1.21.4;
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.

branches: 1.20.8; 1.20.22; 1.20.24; 1.20.26;
__unused removal on arguments; approved by core.

- sprinkle __unused on function decls.
- fix a couple of unused bugs
- no more -Wno-unused for i386

branches: 1.18.8; 1.18.10;
integrate kauth.

branches: 1.17.4; 1.17.6; 1.17.8; 1.17.10; 1.17.12;
merge ktrace-lwp.

* Remove __P()
* Use ANSI function declarations

branches: 1.15.2;
- sprinkle const
- avoid shadowed variables.

nuke trailing whitespace

branches: 1.13.8; 1.13.10;
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)

branches: 1.12.2;
Consistently spell occurrence with two rs.

add RCSIDs

bzero -> memset

branches: 1.9.12; 1.9.14;
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.)

branches: 1.8.12;
Venus must be passed O_CREAT flag on VOP_OPEN iff this is
a creat so that we can will allow a mode 444 file to be
written into. Sync with the latest coda.h and deal with
collateral damage.

I want to distinguish from DEBUG printouts and CODA_VERBOSE printouts.
The latter are normal informational messages that are sometimes
interesting to view.

DIAGNOSTIC -> DEBUG for all non-panic messages. DIAGNOSTIC is only for
sanity checks and should not turn on any messages not already printed
without it.

Conditionalize "stray" printouts under DIAGNOSTIC and DEBUG.
Make files compile if DEBUG is on (from Alan Barrett). Finally,
make coda an lkm.

Final piece of rename cfs->coda

Change cfs/CFS in symbols, strings and constants to coda/CODA
to avoid fs conflicts.

Pass2 complete

branches: 1.1.1;
Initial revision

bcmp -> memcmp

branches: 1.11.18; 1.11.26; 1.11.32;
convert usage of insque/remque to queue(3) macros

branches: 1.10.32; 1.10.34; 1.10.40;
integrate kauth.

branches: 1.9.4; 1.9.6; 1.9.8; 1.9.10; 1.9.12;
merge ktrace-lwp.

branches: 1.8.4;
nuke trailing whitespace

branches: 1.7.8; 1.7.10;
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)

branches: 1.6.34;
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.)

branches: 1.5.10;
Various trivial LP64 tweaks to squelch some compiler warnings.

Final piece of rename cfs->coda

Change cfs/CFS in symbols, strings and constants to coda/CODA
to avoid fs conflicts.

Pass2 complete

branches: 1.1.1;
Initial revision

Pass2 complete

branches: 1.1.1;
Initial revision

s/structres/structures + s/whenver/whenever

branches: 1.6.180;
merge ktrace-lwp.

nuke trailing whitespace

branches: 1.4.46; 1.4.54; 1.4.56;
Final piece of rename cfs->coda

Change cfs/CFS in symbols, strings and constants to coda/CODA
to avoid fs conflicts.

Pass2 complete

branches: 1.1.1;
Initial revision

More on PR 41200: headers that declare ioctls should include sys/ioccom.h.
This covers (I think) all the MI headers outside of external/ (and dist/).

branches: 1.8.18; 1.8.36;
Fix incorrect comments about the buffer size being 2K; it is really 8K now.
From Robert Watson.

branches: 1.7.74; 1.7.96; 1.7.98;
merge ktrace-lwp.

nuke trailing whitespace

branches: 1.5.34; 1.5.42; 1.5.44;
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.)

branches: 1.4.12;
Final piece of rename cfs->coda

Change cfs/CFS in symbols, strings and constants to coda/CODA
to avoid fs conflicts.

Pass2 complete

branches: 1.1.1;
Initial revision

Remove unnecessary include of <sys/malloc.h>.

s/enqueing/enqueuing/ in debug messages (took a bait from recent Nick's commit)
s/occaision/occasion/ in comment.

coda_call(): Appease GCC 12.3.0 -Wmisleading-indentation
No binary changes.

fix various typos, mainly s/trasfering/transferring/ and s/theese/these/.

driver(9): devsw_detach never fails. Make it return void.

Prune a whole lotta dead branches as a result of this. (Some logic
calling this is also wrong for other reasons; devsw_detach is final
-- you should never have any reason to decide to roll it back. To be
cleaned up in subsequent commits...)

XXX kernel ABI change to devsw_detach signature requires bump

Change the kqueue filterops::f_isfd field to filterops::f_flags, and
define a flag FILTEROP_ISFD that has the meaning of the prior f_isfd.
Field and flag name aligned with OpenBSD.

This does not constitute a functional or ABI change, as the field location
and size, and the value placed in that field, are the same as the previous
code, but we're bumping __NetBSD_Version__ so 3rd-party module source code
can adapt, as needed.

NetBSD 9.99.89

Use sel{record,remove}_knote().

branches: 1.58.16;
Use C99 initializer for filterops

Mostly done with spatch with touchups for indentation

@@
expression a;
identifier b,c,d;
identifier p;
@@
const struct filterops p =
- { a, b, c, d
+ {
+ .f_isfd = a,
+ .f_attach = b,
+ .f_detach = c,
+ .f_event = d,
};

branches: 1.57.8;
KNF. Remove extra spaces. No functional change.

include "ioconf.h" to get the 'void <driver>attach(int count);' prototype.

Remove miscfs/syncfs and

- move the syncer into kern/vfs_subr.c.

- change the syncer to process the mountlist and VFS_SYNC as appropriate.

- use an API for mount points similiar to the API for vnodes:
- vfs_syncer_add_to_worklist(struct mount *mp) to add
- vfs_syncer_remove_from_worklist(struct mount *mp) to remove a mount.

No objections on tech-kern@

Move the definition of NVCODA and CODA_COMPAT_5 to coda.h,
remove them from coda_vfsops.c and coda_psdev.c.

branches: 1.53.4;
Add d_discard to all struct cdevsw instances I could find.

All have been set to "nodiscard"; some should get a real implementation.

branches: 1.52.2;
Change (mostly mechanically) every cdevsw/bdevsw I can find to use
designated initializers.

I have not built every extant kernel so I have probably broken at
least one build; however I've also found and fixed some wrong
cdevsw/bdevsw entries so even if so I think we come out ahead.

C requires a statement after a label, and a declaration is not a
statement, so create a block using {}. From christos.

move module code inside module ifdef

branches: 1.49.2; 1.49.4;
Don't increment the mount reference count here. Otherwise we are left with
refcount of one when we unmount, and vfs_destroy does not... Who is expected
to decrement this anyway?!?!

re-arrange things so that vcoda does not depend on coda.

branches: 1.47.14; 1.47.18;
merge christos-time_t

#ifdef _LKM -> #ifndef _KERNEL_OPT

branches: 1.45.2; 1.45.8; 1.45.12;
PR kern/38141 lookup/vfs_busy acquire rwlock recursively

Simplify the mount locking. Remove all the crud to deal with recursion on
the mount lock, and crud to deal with unmount as another weirdo lock.

Hopefully this will once and for all fix the deadlocks with this. With this
commit there are two locks on each mount:

- krwlock_t mnt_unmounting. This is used to prevent unmount across critical
sections like getnewvnode(). It's only ever read locked with rw_tryenter(),
and is only ever write locked in dounmount(). A write hold can't be taken
on this lock if the current LWP could hold a vnode lock.

- kmutex_t mnt_updating. This is taken by threads updating the mount, for
example when going r/o -> r/w, and is only present to serialize updates.
In order to take this lock, a read hold must first be taken on
mnt_unmounting, and the two need to be held across the operation.

One effect of this change: previously if an unmount failed, we would make a
half hearted attempt to back out of it gracefully, but that was unlikely to
work in a lot of cases. Now while an unmount that will be aborted is in
progress, new file operations within the mount will fail instead of being
delayed. That is unlikely to be a problem though, because if the admin
requests unmount of a file system then s(he) has made a decision to deny
access to the resource.

kern/38135 vfs_busy/vfs_trybusy confusion

The symptom was that sometimes file systems would occasionally not appear
in output from 'df' or 'mount' if the system was busy. Resolution:

- Make mount locks work somewhat like vm_map locks.
- vfs_trybusy() now only fails if the mount is gone, or if someone is
unmounting the file system. Simple contention on mnt_lock doesn't
cause it to fail.
- vfs_busy() will wait even if the file system is being unmounted.

branches: 1.43.2;
Merge proc::p_mutex and proc::p_smutex into a single adaptive mutex, since
we no longer need to guard against access from hardware interrupt handlers.

Additionally, if cloning a process with CLONE_SIGHAND, arrange to have the
child process share the parent's lock so that signal state may be kept in
sync. Partially addresses PR kern/37437.

branches: 1.42.2;
when queueing a message back to Venus, prioritise signals by inserting
them at the head of the queue.

The original code had a comment saying to do this but the INSQUE did
not have any way to do that so it didn't actually

convert more insque/remque style queuing to use a queue(3) TAILQ,
this necessitates using a flag to indicate vc_open instead of abusing
the queue pointer but apart from that there is no functional
difference.

remove some unnecessary casting

Welcome to 4.99.55:

- Add a lot of missing selinit() and seldestroy() calls.

- Merge selwakeup() and selnotify() calls into a single selnotify().

- Add an additional 'events' argument to selnotify() call. It will
indicate which event (POLL_IN, POLL_OUT, etc) happen. If unknown,
zero may be used.

Note: please pass appropriate value of 'events' where possible.
Proposed on: <tech-kern>

branches: 1.38.2; 1.38.6;
PR kern/37706 (forced unmount of file systems is unsafe):

- Do reference counting for 'struct mount'. Each vnode associated with a
mount takes a reference, and in turn the mount takes a reference to the
vfsops.
- Now that mounts are reference counted, replace the overcomplicated mount
locking inherited from 4.4BSD with a recursable rwlock.

Do not "return 1" from kqfilter for errors. That value is passed
directly to the userland caller and results in a mysterious EPERM.
Instead, return EINVAL or something else sensible depending on the
case.

branches: 1.36.14; 1.36.16; 1.36.22; 1.36.24;
Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

branches: 1.35.2;
Merge newlock2 to head.

__unused removal on arguments; approved by core.

- sprinkle __unused on function decls.
- fix a couple of unused bugs
- no more -Wno-unused for i386

branches: 1.32.2; 1.32.4;
Fix incomplete initializer

branches: 1.31.4; 1.31.8;
merge ktrace-lwp.

oops, fix previous.

* Remove __P()
* Use ANSI function declarations

branches: 1.28.2;
- sprinkle const
- avoid shadowed variables.

nuke trailing whitespace

branches: 1.26.2; 1.26.10; 1.26.12;
Back out the lwp/ktrace changes. They contained a lot of colateral damage,
and need to be examined and discussed more.

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

fix typo in comment, and add (perhaps redundant) note that this depends
on file-system CODA

interrupt with two rs.

s/si_/sel_/g

merge kqueue branch into -current

kqueue provides a stateful and efficient event notification framework
currently supported events include socket, file, directory, fifo,
pipe, tty and device changes, and monitoring of processes and signals

kqueue is supported by all writable filesystems in NetBSD tree
(with exception of Coda) and all device drivers supporting poll(2)

based on work done by Jonathan Lemon for FreeBSD
initial NetBSD port done by Luke Mewburn and Jason Thorpe

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.

branches: 1.19.4; 1.19.8;
__FUNCTION__ -> __func__

add RCSIDs

branches: 1.17.2;
bzero -> memset

branches: 1.16.2;
When unmounting a file system, acquire the syncer_lock before
vfs_busy'ing just before the dounmount() call. This is to avoid
sleeping with the mountlist_slock held -- but we must acquire
syncer_lock before vfs_busy because the syncer itself uses
syncer_lock -> vfs_busy locking order.

branches: 1.15.2;
update commented out code to recent changes of signal structures

split off thread specific stuff from struct sigacts to struct sigctx, leaving
only signal handler array sharable between threads
move other random signal stuff from struct proc to struct sigctx

This addresses kern/10981 by Matthew Orgass.

Kill register declarations.

branches: 1.12.2;
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.)

branches: 1.11.2;
Make this compile on alpha again.

Typo/braino?

branches: 1.9.4;
Lookup now passes up an extra flag. But old veni will
be ok; new veni will check /dev/cfs0 to make sure that a new
kernel is running.
Also, a bug in vc_nb_close iff CODA_SIGNAL's were seen has been
fixed.

Change the way unmounting happens to guarantee that the
client programs are allowed to finish up (coda_call is
forced to complete) and release their locks. Thus there
is a reasonable chance that the vflush implicit in the
unmount will not get hung on held locks.

I want to distinguish from DEBUG printouts and CODA_VERBOSE printouts.
The latter are normal informational messages that are sometimes
interesting to view.

DIAGNOSTIC -> DEBUG for all non-panic messages. DIAGNOSTIC is only for
sanity checks and should not turn on any messages not already printed
without it.

Conditionalize "stray" printouts under DIAGNOSTIC and DEBUG.
Make files compile if DEBUG is on (from Alan Barrett). Finally,
make coda an lkm.

Final piece of rename cfs->coda

Change cfs/CFS in symbols, strings and constants to coda/CODA
to avoid fs conflicts.

Pass2 complete

branches: 1.1.1;
Initial revision

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.

branches: 1.1.24; 1.1.26; 1.1.28; 1.1.38;
Conditionalize "stray" printouts under DIAGNOSTIC and DEBUG.
Make files compile if DEBUG is on (from Alan Barrett). Finally,
make coda an lkm.

Remove unnecessary include of <sys/malloc.h>.

Replace most uses of vp->v_usecount with a call to vrefcnt(vp), a function
that hides the details and does atomic_load_relaxed(). Signature matches
FreeBSD.

branches: 1.31.18; 1.31.28;
Add missing vrele() and vfs_vnode_iterator_destroy() to coda_cacheprint().

Change coda from hashlist to vcache.
- Replace all hash list crawlers with vfs_vnode_iterator.

Move the definition of NVCODA and CODA_COMPAT_5 to coda.h,
remove them from coda_vfsops.c and coda_psdev.c.

Attach the control object vnode to the coda mount and release it
on unmount. Initialize special files with NODEV.

branches: 1.27.2; 1.27.16;
- 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.

re-arrange things so that vcoda does not depend on coda.

branches: 1.25.2; 1.25.6;
NULL does not need a cast

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.

branches: 1.23.2; 1.23.14; 1.23.16; 1.23.18;
Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

branches: 1.22.4;
__unused removal on arguments; approved by core.

Replace the LIST structure mp->mnt_vnodelist to a TAILQ structure since all
vnodes were synced and processed backwards. This meant that the last
accessed node was processed first and the earlierst last.

An extra benefit is the removal of the ugly hack from the Berkly days on
LFS.

In the proces, i've also replaced the various variations hand written loops
by the TAILQ_FOREACH() macro's.

- sprinkle __unused on function decls.
- fix a couple of unused bugs
- no more -Wno-unused for i386

branches: 1.19.20; 1.19.22;
merge ktrace-lwp.

* Remove __P()
* Use ANSI function declarations

branches: 1.17.4;
nuke trailing whitespace

branches: 1.16.8; 1.16.10;
don't include opt_coda_compat.h unless _KERNEL_OPT. also, only include it
once...

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)

branches: 1.14.2;
do not need <vcoda.h>/NVCODA here

add RCSIDs

bzero -> memset

branches: 1.11.2;
delint newline in string

branches: 1.10.2;
Initial integration of the Unified Buffer Cache project.

Kill register declarations.

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.)

branches: 1.7.2;
Account for widened v_usecount in struct vnode.

branches: 1.6.6;
Venus must be passed O_CREAT flag on VOP_OPEN iff this is
a creat so that we can will allow a mode 444 file to be
written into. Sync with the latest coda.h and deal with
collateral damage.

Conditionalize "stray" printouts under DIAGNOSTIC and DEBUG.
Make files compile if DEBUG is on (from Alan Barrett). Finally,
make coda an lkm.

Final piece of rename cfs->coda

Change cfs/CFS in symbols, strings and constants to coda/CODA
to avoid fs conflicts.

Pass2 complete

branches: 1.1.1;
Initial revision

- 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.

branches: 1.8.110;
merge ktrace-lwp.

nuke trailing whitespace

branches: 1.6.8; 1.6.10;
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)

branches: 1.5.46;
Conditionalize "stray" printouts under DIAGNOSTIC and DEBUG.
Make files compile if DEBUG is on (from Alan Barrett). Finally,
make coda an lkm.

Final piece of rename cfs->coda

Change cfs/CFS in symbols, strings and constants to coda/CODA
to avoid fs conflicts.

Pass2 complete

branches: 1.1.1;
Initial revision

Remove unnecessary include of <sys/malloc.h>.

remove unused code from macro

branches: 1.29.2; 1.29.4;
re-arrange things so that vcoda does not depend on coda.

branches: 1.28.8; 1.28.12;
Correct incomplete size checks for the coda ioctls. From Dan Rosenberg.

branches: 1.27.2; 1.27.4;
Remove extra whitespace added by a stupid tool.
XXX: more in src/sys/arch

bcopy -> memcpy

branches: 1.25.40; 1.25.50; 1.25.52; 1.25.56; 1.25.58; 1.25.60;
Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

branches: 1.24.12; 1.24.14; 1.24.22;
integrate kauth.

Coverity CID 2319: Plug memory leak.

Unbreak the build of this file on our 64-bit ports
by casting to or via intptr_t.

Check symlink count and pointer returned from userspace before
dereferencing it. (I added this during search for the problem fixed by
the earlier readlink buffer allocation fix, and the checks have not
triggered. Still, it's wrong of the kernel to use pointers from user
space without validation.)

branches: 1.20.2;
Add comments explaining how the 3 size variables for venus calls are
used.

Remove defect in size allocation for coda_readlink to avoid having
venus write outside malloced space by including pathname space before
allocation.

Add asserts that cred structure is non-NULL and non-FSCRED.

Check lwp against NULL before dereferencing it.

Assert that output pointer is non-NULL on a few venus returns. This "can't
happen" but has been seen in crash dumps.

With these changes, the following work on a 345 MB coda volume.
(Before, a single invocation of tar or pax on this volume would
crash.)

$ for i in $(seq 1 10); do find . -type f -print0 |xargs -0 md5 > MD5.$i & done

Two copies of

$ for i in $(seq 1 10); do pax -w /coda/[redacted] >/dev/null & done


(lwp NULL check semi-reviewed by wrstuden@)

branches: 1.19.4; 1.19.6; 1.19.8; 1.19.10;
merge ktrace-lwp.

branches: 1.18.4;
nuke trailing whitespace

branches: 1.17.8; 1.17.10;
don't include opt_coda_compat.h unless _KERNEL_OPT. also, only include it
once...

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)

branches: 1.15.2;
Back out the lwp/ktrace changes. They contained a lot of colateral damage,
and need to be examined and discussed more.

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

/*CONTCOND*/ while (0)'ed macros

Add the statfs upcall so df now reports cache size and usage.

add RCSIDs

"wierd" is weird.

bound check the vi.in_size in venus_ioctl()

bzero -> memset

branches: 1.7.20; 1.7.22; 1.7.24;
Various trivial LP64 tweaks to squelch some compiler warnings.

Lookup now passes up an extra flag. But old veni will
be ok; new veni will check /dev/cfs0 to make sure that a new
kernel is running.
Also, a bug in vc_nb_close iff CODA_SIGNAL's were seen has been
fixed.

Venus must be passed O_CREAT flag on VOP_OPEN iff this is
a creat so that we can will allow a mode 444 file to be
written into. Sync with the latest coda.h and deal with
collateral damage.

Final piece of rename cfs->coda

Change cfs/CFS in symbols, strings and constants to coda/CODA
to avoid fs conflicts.

Pass2 complete

branches: 1.1.1;
Initial revision

Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

branches: 1.10.14;
integrate kauth.

branches: 1.9.4; 1.9.6; 1.9.8; 1.9.10; 1.9.12;
merge ktrace-lwp.

branches: 1.8.4;
nuke trailing whitespace

branches: 1.7.8; 1.7.10;
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)

branches: 1.6.2;
Back out the lwp/ktrace changes. They contained a lot of colateral damage,
and need to be examined and discussed more.

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

Add the statfs upcall so df now reports cache size and usage.

branches: 1.3.24; 1.3.26;
Final piece of rename cfs->coda

Pass2 complete

branches: 1.1.1;
Initial revision

fix few typos in comments.

branches: 1.91.2;
Remove unnecessary include of <sys/malloc.h>.

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.

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

Respect "lktype" in all paths in coda_root().

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.

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.

Add generic genfs_suspendctl() and use it for all file systems.
Layered file systems need work.

branches: 1.84.2; 1.84.4;
Change coda from hashlist to vcache.
- Replace all hash list crawlers with vfs_vnode_iterator.

Move the definition of NVCODA and CODA_COMPAT_5 to coda.h,
remove them from coda_vfsops.c and coda_psdev.c.

Attach the control object vnode to the coda mount and release it
on unmount. Initialize special files with NODEV.

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@

branches: 1.80.2;
Change all vfsops to use C99 designated initializers.

No functional changes intended.

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.

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@

tuck in code inside the mutex

replace open-coded scan with macro; fix locking

Since mountlist is now a TAILQ, convert some missed usages
so things build again.

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.

depend on "vcoda" since it has symbols we need.

remove multiple definitions.

re-arrange things so that vcoda does not depend on coda.

branches: 1.70.2; 1.70.6; 1.70.8; 1.70.12; 1.70.14;
use CODA_MAXNAMLEN instead of bogus MAXNAMLEN

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.

branches: 1.68.2;
merge christos-time_t

#ifdef _LKM -> #ifndef _KERNEL_OPT

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@.

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.

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.

Use vp->v_rdev, don't look at the union.

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.

branches: 1.61.2;
Ensure the mount data is a 0-terminated string - otherwise namei() might
process garbage (or unmapped addresses).

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

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.

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

Use eopnotsupp() instead of vfs_stdsuspendctl() and retire the latter.

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

Update coda for VFS_MOUNT() change

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).

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().

branches: 1.52.2;
__unused removal on arguments; approved by core.

- sprinkle __unused on function decls.
- fix a couple of unused bugs
- no more -Wno-unused for i386

branches: 1.50.2; 1.50.4;
fix incomplete initializer

- Use the LWP cached credentials where sane.
- Minor cosmetic changes.

integrate kauth.

branches: 1.47.4; 1.47.6; 1.47.8; 1.47.10; 1.47.12;
merge ktrace-lwp.

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.

* Remove __P()
* Use ANSI function declarations

branches: 1.44.2;
Add attach call so coda gets added to list of vfs supported by the kernel.

- sprinkle const
- avoid shadowed variables.

nuke trailing whitespace

branches: 1.41.2; 1.41.4;
Add the system call and VFS infrastructure for file system extended
attributes.

From FreeBSD.

Revert previous. set_statvfs_info needs the struct proc * arg.

Problem noted by Tom Ivar Helbekkmo on current-users

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

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>

Sysctl descriptions under vfs subtree

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.

add sys/dirent.h

Replace the statfs() family of system calls with statvfs().
Retain binary compatibility.

branches: 1.33.2;
Tango on sysctl_createv() and flags. The flags have all been renamed,
and sysctl_createv() now uses more arguments.

Fix spelling of "orphan" and placement of */

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.

Remove some assigned-to but otherwise unused variables.

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)

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.

nuke an over-zealous memset() which broke statfs() et al. completely

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.

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.

Adjust for ktrace/lwp changes.

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

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.

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.

coda_nc_initialized is not used here, remove local extern defition

branches: 1.19.2;
MNT_GETARGS support

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.

Die, qaddr_t, die! - mnt_data in struct mount is already effectively
a void *, so stop pretending otherwise.

branches: 1.16.2;
Add the statfs upcall so df now reports cache size and usage.

__FUNCTION__ -> __func__

add RCSIDs

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.

branches: 1.12.2;
bzero -> memset

branches: 1.11.2; 1.11.4;
make filesystem vnodeop, specop, fifoop and vnodeopv_* arrays const

Kill register declarations.

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.

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.)

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.

Commit a couple of old fixes

Conditionalize "stray" printouts under DIAGNOSTIC and DEBUG.
Make files compile if DEBUG is on (from Alan Barrett). Finally,
make coda an lkm.

Final piece of rename cfs->coda

Change cfs/CFS in symbols, strings and constants to coda/CODA
to avoid fs conflicts.

Pass2 complete

branches: 1.1.1;
Initial revision

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.

branches: 1.20.6; 1.20.12;
add a forward declaration of struct mbuf.
needed due to some other change I made for ZFS.

Change coda from hashlist to vcache.
- Replace all hash list crawlers with vfs_vnode_iterator.

branches: 1.18.62; 1.18.82;
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

branches: 1.17.2; 1.17.4; 1.17.10; 1.17.12;
* 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

branches: 1.16.2;
Update coda for VFS_MOUNT() change

branches: 1.15.18;
integrate kauth.

branches: 1.14.4; 1.14.6; 1.14.8; 1.14.10; 1.14.12;
merge ktrace-lwp.

branches: 1.13.4;
nuke trailing whitespace

branches: 1.12.4; 1.12.6;
Tweak sysctl setup functions (the macros, actually) for use in lkms,
and tweak lkminit_*.c (where applicable) to call them, and to call
sysctl_teardown() when being unloaded.

This consists of (1) making setup functions not be static when being
compiled as lkms (change to sys/sysctl.h), (2) making prototypes
visible for the various setup functions in header files (changes to
various header files), and (3) making simple "load" and "unload"
functions in the actual lkminit stuff.

linux_sysctl.c also needs its root exposed (ie, made not static) for
this (when built as an lkm).

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.

Replace the statfs() family of system calls with statvfs().
Retain binary compatibility.

branches: 1.9.2;
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)

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.

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.

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

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.

branches: 1.4.12;
Final piece of rename cfs->coda

Change cfs/CFS in symbols, strings and constants to coda/CODA
to avoid fs conflicts.

Pass2 complete

branches: 1.1.1;
Initial revision

fix recently committed typos by msaitoh in few more places, as well as few more.
mainly s/contigous/contiguous/ and s/miliseconds/milliseconds/ in comments.

add a kauth vnode check for creating links

s/sybolic/symbolic/ in comment.

Overhaul of the EVFILT_VNODE kevent(2) filter:

- Centralize vnode kevent handling in the VOP_*() wrappers, rather than
forcing each individual file system to deal with it (except VOP_RENAME(),
because VOP_RENAME() is a mess and we currently have 2 different ways
of handling it; at least it's reasonably well-centralized in the "new"
way).
- Add support for NOTE_OPEN, NOTE_CLOSE, NOTE_CLOSE_WRITE, and NOTE_READ,
compatible with the same events in FreeBSD.
- Track which kevent notifications clients are interested in receiving
to avoid doing work for events no one cares about (avoiding, e.g.
taking locks and traversing the klist to send a NOTE_WRITE when
someone is merely watching for a file to be deleted, for example).

In support of the above:

- Add support in vnode_if.sh for specifying PRE- and POST-op handlers,
to be invoked before and after vop_pre() and vop_post(), respectively.
Basic idea from FreeBSD, but implemented differently.
- Add support in vnode_if.sh for specifying CONTEXT fields in the
vop_*_args structures. These context fields are used to convey information
between the file system VOP function and the VOP wrapper, but do not
occupy an argument slot in the VOP_*() call itself. These context fields
are initialized and subsequently interpreted by PRE- and POST-op handlers.
- Version VOP_REMOVE(), uses the a context field for the file system to report
back the resulting link count of the target vnode. Return this in tmpfs,
udf, nfs, chfs, ext2fs, lfs, and ufs.

NetBSD 9.99.92.

- Add a new vnode op: VOP_PARSEPATH.
- Move namei_getcomponent to genfs_vnops.c and call it genfs_parsepath.
- Add a parsepath entry to every vnode ops table.

VOP_PARSEPATH takes a directory vnode to be searched and a complete
following path and chooses how much of that path to consume. To begin
with, all parsepath calls are genfs_parsepath, which locates the first
'/' as always.

Note that the call doesn't take the whole struct componentname, only
the string. The other bits of struct componentname should not be
needed and there's no reason to cause potential complications by
exposing them.

branches: 1.114.4;
Rewrite coda_readdir() to directly process the container file.

Passing this operation down to the file system holding the container
cannot work for anything but UFS and UFS doesn't allow reading
directory from a plain file since ~2015.

Fixes PR kern/55775 Coda client, its in-kernel part, opens wrong files ...

Add coda_pathconf() always returning EINVAL.

branches: 1.112.2;
Add ACL support for FFS. From FreeBSD.

Replace most uses of vp->v_usecount with a call to vrefcnt(vp), a function
that hides the details and does atomic_load_relaxed(). Signature matches
FreeBSD.

branches: 1.110.4;
v_interlock -> vmobjloc

UVM locking changes, proposed on tech-kern:

- Change the lock on uvm_object, vm_amap and vm_anon to be a RW lock.
- Break v_interlock and vmobjlock apart. v_interlock remains a mutex.
- Do partial PV list locking in the x86 pmap. Others to follow later.

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.

branches: 1.107.4; 1.107.6;
Fix locking for readdir code (Brett Lymn)

branches: 1.106.2; 1.106.8; 1.106.10;
Make VOP_RECLAIM do the last unlock of the vnode.

VOP_RECLAIM naturally has exclusive access to the vnode, so having it
locked on entry is not strictly necessary -- but it means if there
are any final operations that must be done on the vnode, such as
ffs_update, requiring exclusive access to it, we can now kassert that
the vnode is locked in those operations.

We can't just have the caller release the last lock because some file
systems don't use genfs_lock, and require the vnode to remain valid
for VOP_UNLOCK to work, notably unionfs.

Change VOP_REMOVE and VOP_RMDIR to preserve lock/ref on dvp.

No change to vp -- the plan is to replace the node by the
componentname in the vop parameters, and let all directory vops do
lookups internally.

Proposed on tech-kern with no objections:
https://mail-index.netbsd.org/tech-kern/2017/04/17/msg021825.html

Make VOP_INACTIVE preserve vnode lock on return.

Discussed on tech-kern:
https://mail-index.netbsd.org/tech-kern/2017/04/01/msg021751.html

Ride 7.99.68, a bumpy bus of incremental vfs improvements!

branches: 1.103.2;
Remove now obsolete operation vcache_remove().

Welcome to 7.99.36

branches: 1.102.2;
Make VOP_LINK return directory still locked and referenced.

Ride 7.99.10 bump.

Change coda from hashlist to vcache.
- Replace all hash list crawlers with vfs_vnode_iterator.

Remove cnodes from coda_reclaim(), not from coda_inactive().

Attach the control object vnode to the coda mount and release it
on unmount. Initialize special files with NODEV.

branches: 1.98.2;
src is too big these days to tolerate superfluous apostrophes. It's
"its", people!

Add VOP_FALLOCATE and VOP_FDISCARD to every vnode ops table I can
find.

The filesystem ones all call genfs_eopnotsupp - right now I am only
implementing the plumbing and we can implement fallocate and/or
fdiscard for files later.

The device ones call spec_fallocate (which is also genfs_eopnotsupp)
and spec_fdiscard, which dispatches to the device-level op.

The fifo ones all call vn_fifo_bypass, which also ends up being
EOPNOTSUPP.

branches: 1.96.2;
Mechanically replace simplelock with kmutex_t.

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

Change vnode operation lookup to return the resulting vnode *vpp unlocked.
Change cache_lookup() to return an unlocked vnode.

Discussed on tech-kern@

Welcome to 6.99.31

Change vnode operations create, mknod, mkdir and symlink to return
the resulting vnode *vpp unlocked.

Discussed on tech-kern@

Welcome to 6.99.30

Change vnode operations create, mknod, mkdir and symlink to keep the
directory node dvp locked on return.

Discussed on tech-kern@

Welcome to 6.99.29

remove unused code.

branches: 1.90.2; 1.90.4;
- 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.

-fno-common fallout.

comment out debugging printfs

fix locking in getpages when running executables.

move the assert after the locked case.

Instead of sharing the coda vnode lock with the ffs vnode lock, share the
ffs vnode lock with coda.

cosmetic only: __func__, vnode_t

Fixes from get/putpages from rmind.
In grab vnode, share the lock of the coda vnode with the underlying vnode,
so that the locking protocol works.

re-arrange things so that vcoda does not depend on coda.

branches: 1.81.2; 1.81.6;
Reduce verbosity of semi-debug coda_inactive printf.

Rather than print if the usecount is > 0, only print if it is greater
than 1. It seems 1 is normal.

Welcome to 5.99.53! Merge rmind-uvmplock branch:

- Reorganize locking in UVM and provide extra serialisation for pmap(9).
New lock order: [vmpage-owner-lock] -> pmap-lock.

- Simplify locking in some pmap(9) modules by removing P->V locking.

- Use lock object on vmobjlock (and thus vnode_t::v_interlock) to share
the locks amongst UVM objects where necessary (tmpfs, layerfs, unionfs).

- Rewrite and optimise x86 TLB shootdown code, make it simpler and cleaner.
Add TLBSTATS option for x86 to collect statistics about TLB shootdowns.

- Unify /dev/mem et al in MI code and provide required locking (removes
kernel-lock on some ports). Also, avoid cache-aliasing issues.

Thanks to Andrew Doran and Joerg Sonnenberger, as their initial patches
formed the core changes of this branch.

branches: 1.79.2;
Remove cache_purge(9) calls from reclamation routines in the file systems,
as vclean(9) performs it for us since Lite2 merge.

branches: 1.78.2;
Abolish the SAVENAME and HASBUF flags. There is now always a buffer,
so the path in a struct componentname is now always valid during VOP
calls.

Abolish struct componentname's cn_pnbuf. Use the path buffer in the
pathbuf object passed to namei as work space instead. (For now a pnbuf
pointer appears in struct nameidata, to support certain unclean things
that haven't been fixed yet, but it will be going away in the future.)

This removes the need for the SAVENAME and HASBUF namei flags.

Correct incomplete size checks for the coda ioctls. From Dan Rosenberg.

Remove vlockmgr(). Generic vnode lock operations now use a rwlock located
in the vnode. All LK_* flags move from sys/lock.h to sys/vnode.h. Calls
to vlockmgr() in file systems get replaced with VOP_LOCK() or VOP_UNLOCK().

Welcome to 5.99.34.

Discussed on tech-kern.

Clean up vnode lock operations pass 2:

VOP_UNLOCK(vp, flags) -> VOP_UNLOCK(vp): Remove the unneeded flags argument.

Welcome to 5.99.32.

Discussed on tech-kern.

coda_lock(): LK_INTERLOCK flag no longer possible.

Clean up vnode lock operations:

- VOP_LOCK(vp, flags): Limit the set of allowed flags to LK_EXCLUSIVE,
LK_SHARED and LK_NOWAIT. LK_INTERLOCK is no longer allowed as it
makes no sense here.

- VOP_ISLOCKED(vp): Remove the for some time unused return value
LK_EXCLOTHER. Mark this operation as "diagnostic only".
Making a lock decision based on this operation is no longer allowed.

Discussed on tech-kern.

branches: 1.71.2; 1.71.4;
Remove some unecessary includes sys/user.h header.

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.

branches: 1.69.2;
merge christos-time_t

branches: 1.68.6; 1.68.8; 1.68.12; 1.68.20; 1.68.22; 1.68.26; 1.68.28;
Replace struct lock on vnodes with a simpler lock object built on
krwlock_t. This is a step towards removing lockmgr and simplifying
vnode locking. Discussed on tech-kern.

Remove VOP_LEASE. Discussed on tech-kern.

Merge vmlocking2 to head.

Convert many of the uses of __attribute__ to equivalent
__packed, __unused and __dead macros from cdefs.h

branches: 1.64.4;
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.

branches: 1.63.2;
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

branches: 1.62.4; 1.62.6; 1.62.12; 1.62.14;
Initialize size and/or writesize when creating a vnode.

branches: 1.61.2;
make coda compile again.

Stop doing vref of vnodes on open (and vrele on close); this makes no
sense.

Improve coda_inactive, turning commented out DIAGNOSTIC checks into printfs.

minor style/comment fixes.

In coda_{get,put}pages, drop and obtain v_uobj.vmobjlock rather than
v_interlock. They are actually the same lock, but the former protects
the uvm object associated with the vnode, and the latter vnode
reference counts. Explained to me by chs@.

Based on suggestion from chs@, drop coda vnode interlock before
obtaining interlock on container vnode in coda_{get,put}pages. This
is the only functional change in this commit.

Improve many comments. In particular, note that the relationship
between VOP_OPEN and obtaining a container file (e.g. for getpages for
executables) is messy.

Add printfs for 'internal open' cases in coda_rdwr. These have not
been triggered in my testing. Note an apparent vref leak.

Rewrite coda_{get,put}pages. Now copying files from coda with mmap
does not trigger assertions in uvm_fault, and executing files from
coda works as well.

Code very lightly reviewed by wrstuden@; scrutiny by those who
understand vnode and especially {get,put}pages would be appreciated.

revert putpages part of last change. Thanks to pooka@ for pointing
out that the v_interlock in the previous code and v_uobj.vmobjlock are
really the same thing.

Further cleanups on coda vnode handling.

Re-enable mmap. The problem is how uvm_fault handles page faults from
coda vnodes via container files, and executing a program caused the
same problem so disabling mmap only helped cp(1).

coda_open:
rename variables to match vnode_if.src
better comments about lock/reference state of vnodes
keep lock on container file until after VOP_OPEN, which requires locked vp
remove #if 0'd code to PNBUF_PUT

coda_link:
rename variables to match vnode_if.src
error out early if vp == dvp
check return value on vn_lock, and add comment questoining the lock
clarify lock handling, but unchanged logic
remove #if 0'd code to PNBUF_PUT

coda_rmdir:
error out early if vp == dvp
remove #if 0'd code to PNBUF_PUT

coda_grab_vnode:
add comments, and in particular question undocumented VFS_VGET semantics

coda_getpages:
question calling VOP_OPEN, which requires a locked vnode, with the
vnode we got (vop_getpages does not guarantee a locked vnode)

coda_putpages:
remove inexplicable simple_unlock(&vp->v_interlock);
add printf so we notice if this is ever called

add comment explaining that the implementation will lead to trouble,
because vnode_if.src says putpages is called with v_uobj.vmobjlock
held and is supposed to unlock it

With these changes and an uncommitted change to uvm_fault not to panic
if uvm objects are not equal, coda seems stable again.

Disable mmap for coda. When copying a file from coda to normal ffs, I
got a panic in uvm_fault from ffs_write. I believe this is because cp
used mmap, the container file page was not in core, and uvm_fault
objected to the container file vnode and the coda vnode not matching.
I have long been plagued by crashes on cp from coda, and this was the
first time I got and understood a backtrace.

Clean up old comments that are no longer accurate.

Document refcounting better.

Note some questionable behaviors with XXX.

Clean up PNBUF_PUT and SAVESTART. Only do this where vnodeops(9) says
we should, and do it on error also.

In symlink, vput parent and free namebuf even in error cases.

Improve conformance to vnode locking rules in coda_lookup, by doing
the unlock parent, lock child, lock parent in the ISDOTDOT case.

Clean up and rewrite comments to match more closely current reality.

Sprinkle XXX where I'm not sure the current rules are being followed.

Reviewed by wrstuden@, who agreed that this is an improvement over the
current code, with concerns about LK_RETRY and whether the ISDOTDOT
locking is done soon enough.

branches: 1.52.2; 1.52.4;
Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

branches: 1.51.2;
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().

branches: 1.50.4; 1.50.6; 1.50.8;
- Use the LWP cached credentials where sane.
- Minor cosmetic changes.

integrate kauth.

COVERITY CID 1113: Don't use NULL for VOP_READDIR

branches: 1.47.2; 1.47.4; 1.47.6;
merge yamt-uio_vmspace branch.

- use vmspace rather than proc or lwp where appropriate.
the latter is more natural to specify an address space.
(and less likely to be abused for random purposes.)
- fix a swdmover race.

branches: 1.46.2; 1.46.4;
In coda_lookup, add LK_RETRY to locking of child vnode. The previous
code paniced if the first attempt to lock the vnode failed, and such
failures are not errors - just cause to wait. gdt was regularly
hitting this panic.

Correct one of two identical panic messages.

Add XXX comments about

ISDOTDOT locking rules not being followed

questioning the practice of unlocking parent before locking child.
(But, given that the vnode is referenced, it can't be deleted, so
maybe this is fine.)

Why is failured to unlock not a panic but failure to lock is?

branches: 1.45.2;
merge ktrace-lwp.

branches: 1.44.2;
merge yamt-vop branch. remove following VOPs.

VOP_BLKATOFF
VOP_VALLOC
VOP_BALLOC
VOP_REALLOCBLKS
VOP_VFREE
VOP_TRUNCATE
VOP_UPDATE

branches: 1.43.2;
* Remove __P()
* Use ANSI function declarations

64 bit inode changes.

branches: 1.41.2;
- sprinkle const
- avoid shadowed variables.

nuke trailing whitespace

branches: 1.39.4; 1.39.6;
Fix coda symlink vnodeops. Provided by Greg Troxel. PR kern/25963.

branches: 1.38.2;
Remove some assigned-to but otherwise unused variables.

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)

branches: 1.36.2;
Back out the lwp/ktrace changes. They contained a lot of colateral damage,
and need to be examined and discussed more.

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.

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

writable, not writeable.

remove trailing \n in panic(). approved perry.

Die, qaddr_t, die! - mnt_data in struct mount is already effectively
a void *, so stop pretending otherwise.

branches: 1.30.8;
add a VOP_PUTPAGES method for all the filesystems that don't have pages,
just unlock the interlock.

add a VTOC macro that doesn't cast, and fix a spurious lvalue cast with it.

__FUNCTION__ -> __func__

add RCSIDs

branches: 1.26.2;
change vop_symlink and vop_mknod to return vpp (the created node)
refed, so that the caller can actually use it. update callers and
file systems that implement these vnode operations

branches: 1.25.2;
add coda_{get,put}pages so that mmap works.

add a genfs_mmap() and change all of the disk-based filesystems
to implement VOP_MMAP() with the genfs version, in preparation for
actually using this VOP.

branches: 1.23.2;
make filesystem vnodeop, specop, fifoop and vnodeopv_* arrays const

Initial integration of the Unified Buffer Cache project.

Adapt for VOP_FSYNC parameter change.

Convert namei pathname buffer allocation to use the pool allocator.

remove redundant vm includes.

branches: 1.18.4;
Quiet some printfs unless VERBOSE.

Kill register declarations.

fix DEBUG printfs to compile.

branches: 1.15.2; 1.15.4;
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.)

In spec_close(), if we're not doing a non-blocking close and VXLOCK is
not set, unlock the vnode before calling the device's close routine and
relock it after it returns. tty close routines will sleep waiting for
buffers to drain, which won't happen often times as the other side needs
to grab the vnode lock first.

Make all unmount routines lock the device vnode before calling VOP_CLOSE().

branches: 1.13.2;
Account for widened v_usecount in struct vnode.

Make this compile on alpha again.

Add support for fcntl(2) to generate VOP_FCNTL calls. Any fcntl
call with F_FSCTL set and F_SETFL calls generate calls to a new
fileop fo_fcntl. Add genfs_fcntl() and soo_fcntl() which return 0
for F_SETFL and EOPNOTSUPP otherwise. Have all leaf filesystems
use genfs_fcntl().

Reviewed by: thorpej
Tested by: wrstuden

Bump osrelease to 1.4E. Add layerfs files, remove null_subr.c.

Update coda to new struct lock in struct vnode.

make fdescfs, kernfs, portalfs, and procfs actually lock their vnodes.
It's not that hard.

Make unionfs set v_vnlock = NULL so any overlayed fs will call its
VOP_LOCK.

branches: 1.9.4; 1.9.6;
Commit a couple of old fixes

Change the way unmounting happens to guarantee that the
client programs are allowed to finish up (coda_call is
forced to complete) and release their locks. Thus there
is a reasonable chance that the vflush implicit in the
unmount will not get hung on held locks.

I want to distinguish from DEBUG printouts and CODA_VERBOSE printouts.
The latter are normal informational messages that are sometimes
interesting to view.

DIAGNOSTIC -> DEBUG for all non-panic messages. DIAGNOSTIC is only for
sanity checks and should not turn on any messages not already printed
without it.

Conditionalize "stray" printouts under DIAGNOSTIC and DEBUG.
Make files compile if DEBUG is on (from Alan Barrett). Finally,
make coda an lkm.

Final piece of rename cfs->coda

Change cfs/CFS in symbols, strings and constants to coda/CODA
to avoid fs conflicts.

Pass2 complete

branches: 1.1.1;
Initial revision

Add coda_pathconf() always returning EINVAL.

branches: 1.16.52;
- 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.

-fno-common fallout.

Fixes from get/putpages from rmind.
In grab vnode, share the lock of the coda vnode with the underlying vnode,
so that the locking protocol works.

branches: 1.13.98; 1.13.102;
integrate kauth.

branches: 1.12.4; 1.12.6; 1.12.8; 1.12.10; 1.12.12;
merge ktrace-lwp.

* Remove __P()
* Use ANSI function declarations