Commit Graph

170 Commits

Author SHA1 Message Date
kmacy
0c00ea16db change vop_lock handling to allowing tracking of callers' file and line for
acquisition of lockmgr locks

Approved by: scottl (standing in for mentor rwatson)
2006-11-13 05:51:22 +00:00
phk
ef310efff8 Since DELAY() was moved, most <machine/clock.h> #includes have been
unnecessary.
2006-05-16 14:37:58 +00:00
yar
3822005cd3 CODA_COMPAT_5 may not be defined unconditionally in the coda5 module.
Otherwise a kernel build would break in the coda5 module if the main
kernel conf file enabled CODA_COMPAT_5, too.  Redefined symbols are
strictly disallowed by -Werror.

To overcome this issue, introduce a different symbol indicating coda5
build, CODA5_MODULE, and translate it to CODA_COMPAT_5 appropriately
in /sys/coda/coda.h.

MFC after:	3 days
2006-02-27 12:04:13 +00:00
jeff
30a231055b - Reorder calls to vrele() after calls to vput() when the vrele is a
directory.  vrele() may lock the passed vnode, which in these cases would
   give an invalid lock order of child -> parent.  These situations are
   deadlock prone although do not typically deadlock because the vrele
   is typically not releasing the last reference to the vnode.  Users of
   vrele must consider it as a call to vn_lock() and order it appropriately.

MFC After: 	1 week
Sponsored by:	Isilon Systems, Inc.
Tested by:	kkenn
2006-02-01 00:25:26 +00:00
rwatson
56bc8d8e33 Convert last four functions in coda_vnops.c to ANSI C function
declarations.  I knew I would get to fix something in Coda
eventually.

MFC after:	1 week
2006-01-21 19:51:47 +00:00
maxim
93d7e294fc o Fix typo in the define: s/MRAK_INT_GEN/MARK_INT_GEN/. The typo
was harmless because the define is not used in coda_vfsops.c.

Submitted by:	Hugo Meiland
2006-01-09 18:07:06 +00:00
ru
798500dfd8 Fix -Wundef from compiling the amd64 LINT. 2005-12-04 10:06:06 +00:00
rwatson
be4f357149 Normalize a significant number of kernel malloc type names:
- Prefer '_' to ' ', as it results in more easily parsed results in
  memory monitoring tools such as vmstat.

- Remove punctuation that is incompatible with using memory type names
  as file names, such as '/' characters.

- Disambiguate some collisions by adding subsystem prefixes to some
  memory types.

- Generally prefer lower case to upper case.

- If the same type is defined in multiple architecture directories,
  attempt to use the same name in additional cases.

Not all instances were caught in this change, so more work is required to
finish this conversion.  Similar changes are required for UMA zone names.
2005-10-31 15:41:29 +00:00
rwatson
daa1c89f45 Merge the dev_clone and dev_clone_cred event handlers into a single
event handler, dev_clone, which accepts a credential argument.
Implementors of the event can ignore it if they're not interested,
and most do.  This avoids having multiple event handler types and
fall-back/precedence logic in devfs.

This changes the kernel API for /dev cloning, and may affect third
party packages containg cloning kernel modules.

Requested by:	phk
MFC after:	3 days
2005-08-08 19:55:32 +00:00
jeff
afab3762a0 - Change all filesystems and vfs_cache to relock the dvp once the child is
locked in the ISDOTDOT case.  Se vfs_lookup.c r1.79 for details.

Sponsored by:	Isilon Systems, Inc.
2005-04-13 10:59:09 +00:00
phk
7af1e31761 Explicitly hold a reference to the cdev we have just cloned. This
closes the race where the cdev was reclaimed before it ever made it
back to devfs lookup.
2005-03-31 12:19:44 +00:00
jeff
d673a48266 - Don't panic if we can't lock a child in lookup, return an error instead.
- Only unlock the directory if this is a DOTDOT lookup.  Previously this
   code could have deadlocked if there was a DOTDOT lookup with LOCKPARENT
   set and another thread was locking the other way up the tree.

Sponsored by:	Isilon Systems, Inc.
2005-03-28 13:39:16 +00:00
jeff
56f1fc7189 - Update vfs_root implementations to match the new prototype. None of
these filesystems will support shared locks until they are explicitly
   modified to do so.  Careful review must be done to ensure that this
   is safe for each individual filesystem.

Sponsored by:   Isilon Systems, Inc.
2005-03-24 07:39:03 +00:00
phk
651dd9f4d4 Disable two users of findcdev. They do the wrong thing now and will
need to be fixed.  In both cases the API should be reengineered to do
something (more) sensible.
2005-03-15 12:39:30 +00:00
phk
4799d2dacc Print devtoname() instead of minor(). 2005-03-15 10:01:31 +00:00
jeff
5bd51ec6e6 - The VI_DOOMED flag now signals the end of a vnode's relationship with
the filesystem.  Check that rather than VI_XLOCK.

Sponsored by:	Isilon Systems, Inc.
2005-03-13 12:14:56 +00:00
jeff
1c1edae55c - The c_lock in the coda node does not offer any features over the standard
vnode lock.  Remove the c_lock and use the vn lock in its place.
 - Keep the coda lock functions so that the debugging information is
   preserved, but call directly to the vop_std*lock routines for the real
   functionality.

Sponsored by:	Isilon Systems, Inc.
2005-03-13 12:09:34 +00:00
das
f0a7c4fbf8 Replace the workaround for a deadlock bug in Coda with a different
workaround that does not rely on vfs_start().
2005-02-20 23:01:57 +00:00
phk
9c17a17dac Remove vop_destroyvobject() initialization. 2005-02-07 08:04:24 +00:00
phk
1b21636022 Make filesystems get rid of their own vnodes vnode_pager object in
VOP_RECLAIM().
2005-01-28 14:42:17 +00:00
phk
32b3eaa1c2 Take VOP_GETVOBJECT() out to pasture. We use the direct pointer now. 2005-01-25 00:42:16 +00:00
phk
d0bbbd0881 Kill VOP_CREATEVOBJECT(), it is now the responsibility of the filesystem
for a given vnode to create a vnode_pager object if one is needed.
2005-01-25 00:12:24 +00:00
phk
716e67e429 Don't call VOP_CREATEVOBJECT(), it's the responsibility of the
filesystem which owns the vnode.
2005-01-24 23:53:54 +00:00
phk
a6d81685da Remove unused coda_fbsd_getpages() 2005-01-19 08:24:53 +00:00
phk
3760addae2 Ditch vfs_object_create() and make the callers call VOP_CREATEVOBJECT()
directly.
2005-01-13 12:25:19 +00:00
phk
da2718f1af Remove the unused credential argument from VOP_FSYNC() and VFS_SYNC().
I'm not sure why a credential was added to these in the first place, it is
not used anywhere and it doesn't make much sense:

	The credentials for syncing a file (ability to write to the
	file) should be checked at the system call level.

	Credentials for syncing one or more filesystems ("none")
	should be checked at the system call level as well.

	If the filesystem implementation needs a particular credential
	to carry out the syncing it would logically have to the
	cached mount credential, or a credential cached along with
	any delayed write data.

Discussed with:	rwatson
2005-01-11 07:36:22 +00:00
imp
7be6bff985 Start each of the license/copyright comments with /*- 2005-01-05 23:35:00 +00:00
phk
39311fe2e6 Convert coda to nmount. 2004-12-06 19:46:02 +00:00
phk
59f305606c Back when VOP_* was introduced, we did not have new-style struct
initializations but we did have lofty goals and big ideals.

Adjust to more contemporary circumstances and gain type checking.

	Replace the entire vop_t frobbing thing with properly typed
	structures.  The only casualty is that we can not add a new
	VOP_ method with a loadable module.  History has not given
	us reason to belive this would ever be feasible in the the
	first place.

	Eliminate in toto VOCALL(), vop_t, VNODEOP_SET() etc.

	Give coda correct prototypes and function definitions for
	all vop_()s.

	Generate a bit more data from the vnode_if.src file:  a
	struct vop_vector and protype typedefs for all vop methods.

	Add a new vop_bypass() and make vop_default be a pointer
	to another struct vop_vector.

	Remove a lot of vfs_init since vop_vector is ready to use
	from the compiler.

	Cast various vop_mumble() to void * with uppercase name,
	for instance VOP_PANIC, VOP_NULL etc.

	Implement VCALL() by making vdesc_offset the offsetof() the
	relevant function pointer in vop_vector.  This is disgusting
	but since the code is generated by a script comparatively
	safe.  The alternative for nullfs etc. would be much worse.

	Fix up all vnode method vectors to remove casts so they
	become typesafe.  (The bulk of this is generated by scripts)
2004-12-01 23:16:38 +00:00
phk
d8b3df3cb9 Make VOP_BMAP return a struct bufobj for the underlying storage device
instead of a vnode for it.

The vnode_pager does not and should not have any interest in what
the filesystem uses for backend.

(vfs_cluster doesn't use the backing store argument.)
2004-11-15 09:18:27 +00:00
phk
a4f5e76f74 Do not use devsw() but si_devsw direction. This is still bogus but a
fair bit less so.
2004-09-23 12:19:24 +00:00
brooks
eeddbfb0fa General modernization of coda:
- Ditch NVCODA
 - Don't use a static major
 - Don't declare functions extern

Reviewed by:	peter
2004-09-01 01:19:52 +00:00
peter
1d9abdbe78 Kill count device support from config. I've changed the last few
remaining consumers to have the count passed as an option.  This is
i4b, pc98/wdc, and coda.

Bump configvers.h from 500013 to 600000.

Remove heuristics that tried to parse "device ed5" as 5 units of the ed
device.  This broke things like the snd_emu10k1 device, which required
quotes to make it parse right.  The no-longer-needed quotes have been
removed from NOTES, GENERIC etc.  eg, I've removed the quotes from:
   device  snd_maestro
   device  "snd_maestro3"
   device  snd_mss

I believe everything will still compile and work after this.
2004-08-30 23:03:58 +00:00
phk
2d868d02cf Put a version element in the VFS filesystem configuration structure
and refuse initializing filesystems with a wrong version.  This will
aid maintenance activites on the 5-stable branch.

s/vfs_mount/vfs_omount/

s/vfs_nmount/vfs_mount/

Name our filesystems mount function consistently.

Eliminate the namiedata argument to both vfs_mount and vfs_omount.
It was originally there to save stack space.  A few places abused
it to get hold of some credentials to pass around.  Effectively
it is unused.

Reorganize the root filesystem selection code.
2004-07-30 22:08:52 +00:00
kan
cd2bbc3fed Avoid casts as lvalues. 2004-07-28 06:05:41 +00:00
phk
5c95d686a1 Do a pass over all modules in the kernel and make them return EOPNOTSUPP
for unknown events.

A number of modules return EINVAL in this instance, and I have left
those alone for now and instead taught MOD_QUIESCE to accept this
as "didn't do anything".
2004-07-15 08:26:07 +00:00
rwatson
2fbca9279f Remove 'td = curthread' that shadows the arguments to coda_root().
Missed by:	alfred
2004-07-12 14:11:26 +00:00
alfred
8a1713aada Make VFS_ROOT() and vflush() take a thread argument.
This is to allow filesystems to decide based on the passed thread
which vnode to return.
Several filesystems used curthread, they now use the passed thread.
2004-07-12 08:14:09 +00:00
phk
070a613a48 When we traverse the vnodes on a mountpoint we need to look out for
our cached 'next vnode' being removed from this mountpoint.  If we
find that it was recycled, we restart our traversal from the start
of the list.

Code to do that is in all local disk filesystems (and a few other
places) and looks roughly like this:

		MNT_ILOCK(mp);
	loop:
		for (vp = TAILQ_FIRST(&mp...);
		    (vp = nvp) != NULL;
		    nvp = TAILQ_NEXT(vp,...)) {
			if (vp->v_mount != mp)
				goto loop;
			MNT_IUNLOCK(mp);
			...
			MNT_ILOCK(mp);
		}
		MNT_IUNLOCK(mp);

The code which takes vnodes off a mountpoint looks like this:

	MNT_ILOCK(vp->v_mount);
	...
	TAILQ_REMOVE(&vp->v_mount->mnt_nvnodelist, vp, v_nmntvnodes);
	...
	MNT_IUNLOCK(vp->v_mount);
	...
	vp->v_mount = something;

(Take a moment and try to spot the locking error before you read on.)

On a SMP system, one CPU could have removed nvp from our mountlist
but not yet gotten to assign a new value to vp->v_mount while another
CPU simultaneously get to the top of the traversal loop where it
finds that (vp->v_mount != mp) is not true despite the fact that
the vnode has indeed been removed from our mountpoint.

Fix:

Introduce the macro MNT_VNODE_FOREACH() to traverse the list of
vnodes on a mountpoint while taking into account that vnodes may
be removed from the list as we go.  This saves approx 65 lines of
duplicated code.

Split the insmntque() which potentially moves a vnode from one mount
point to another into delmntque() and insmntque() which does just
what the names say.

Fix delmntque() to set vp->v_mount to NULL while holding the
mountpoint lock.
2004-07-04 08:52:35 +00:00
phk
40dd98a3bd Second half of the dev_t cleanup.
The big lines are:
	NODEV -> NULL
	NOUDEV -> NODEV
	udev_t -> dev_t
	udev2dev() -> findcdev()

Various minor adjustments including handling of userland access to kernel
space struct cdev etc.
2004-06-17 17:16:53 +00:00
phk
dfd1f7fd50 Do the dreaded s/dev_t/struct cdev */
Bump __FreeBSD_version accordingly.
2004-06-16 09:47:26 +00:00
phk
f43aa0c4bc add missing #include <sys/module.h> 2004-05-30 20:27:19 +00:00
phk
39fb4aef3d Device megapatch 5/6:
Remove the unused second argument from udev2dev().

Convert all remaining users of makedev() to use udev2dev().  The
semantic difference is that udev2dev() will only locate a pre-existing
dev_t, it will not line makedev() create a new one.

Apart from the tiny well controlled windown in D_PSEUDO drivers,
there should no longer be any "anonymous" dev_t's in the system
now, only dev_t's created with make_dev() and make_dev_alias()
2004-02-21 21:32:15 +00:00
phk
ad925439e0 Device megapatch 4/6:
Introduce d_version field in struct cdevsw, this must always be
initialized to D_VERSION.

Flip sense of D_NOGIANT flag to D_NEEDGIANT, this involves removing
four D_NOGIANT flags and adding 145 D_NEEDGIANT flags.
2004-02-21 21:10:55 +00:00
tanimura
7eade05dfa - Implement selwakeuppri() which allows raising the priority of a
thread being waken up.  The thread waken up can run at a priority as
  high as after tsleep().

- Replace selwakeup()s with selwakeuppri()s and pass appropriate
  priorities.

- Add cv_broadcastpri() which raises the priority of the broadcast
  threads.  Used by selwakeuppri() if collision occurs.

Not objected in:	-arch, -current
2003-11-09 09:17:26 +00:00
kan
36d60f3bb7 Remove mntvnode_mtx and replace it with per-mountpoint mutex.
Introduce two new macros MNT_ILOCK(mp)/MNT_IUNLOCK(mp) to
operate on this mutex transparently.

Eventually new mutex will be protecting more fields in
struct mount, not only vnode list.

Discussed with: jeff
2003-11-05 04:30:08 +00:00
bde
871953665f Include <sys/mutex.h>. Don't depend on namespace pollution in <sys/vnode.h>.
Fixed a nearby style bug.  The include of vcoda.h used angle brackets and
was not used.
2003-10-05 07:44:45 +00:00
jeff
9f28715adc - Check XLOCK prior to accessing v_data. 2003-10-05 06:43:30 +00:00
jeff
c95a875344 - Make proper use of the mntvnode_mtx. We do not need the loop label
because we do not drop the mntvnode_mtx.  If this code had ever executed
   and hit the loop condition it would have spun forever.
2003-10-04 13:16:54 +00:00
tjr
019aab9477 Move an overly verbose message under #ifdef CODA_VERBOSE. 2003-09-13 01:13:56 +00:00