Commit Graph

56 Commits

Author SHA1 Message Date
Robert Watson
ff8a07fda2 Add SDT DTrace probes for VFS vnode operations in the vfs:vop
provider namespace.  These are inserted dynamically into the
VOP_..._AP() functions created from vnode_if.src.  Each VOP has
entry and return probes, as arg0 the primary vnode, arg1 the
vnode operation argument structure pointer, providing access to
IN and OUT arguments, and for return probes, arg2 the return
value.

MFC after:	1 month
Sponsored by:	Google, Inc.
2009-03-29 03:30:15 +00:00
John Baldwin
c439bdd86f Remove some unused and broken code that attempted to not invoke locking
asserts on NULL vnode pointers.  All the vnode assertion routines already
check for NULL vnode pointers.
2008-11-03 19:57:40 +00:00
Diomidis Spinellis
44d6e87b07 - Add two checks for syntax errors
- Improve error reporting
- Remove redundant conditionals
2006-05-30 21:13:28 +00:00
Diomidis Spinellis
f69ec7af12 Assertion code specifications are introduced using special character
sequences that are distinct from comments. %% is used for argument
locks; %! for pre- and post-conditions.
2006-05-30 20:49:54 +00:00
Diomidis Spinellis
3cd6252069 Update usage comment to match reality. 2006-05-26 07:13:26 +00:00
Dag-Erling Smørgrav
0430a5e289 Eradicate caddr_t from the VFS API. 2005-12-14 00:49:52 +00:00
Dag-Erling Smørgrav
e26b05cf44 Nuke vnodeop_desc.vdesc_transports, which has been unused since the dawn
of time (or the inception of ncvs, whichever came last)
2005-12-14 00:15:11 +00:00
Suleiman Souhlal
679985d03a Allow EVFILT_VNODE events to work on every filesystem type, not just
UFS by:
- Making the pre and post hooks for the VOP functions work even when
DEBUG_VFS_LOCKS is not defined.
- Moving the KNOTE activations into the corresponding VOP hooks.
- Creating a MNTK_NOKNOTE flag for the mnt_kern_flag field of struct
mount that permits filesystems to disable the new behavior.
- Creating a default VOP_KQFILTER function: vfs_kqfilter()

My benchmarks have not revealed any performance degradation.

Reviewed by:	jeff, bde
Approved by:	rwatson, jmg (kqueue changes), grehan (mentor)
2005-06-09 20:20:31 +00:00
Jeff Roberson
680a1ec631 - Add the character "E" to the understood lock types. This means
the VOP requires an exclusive lock.

Sponsored by:	Isilon Systems, Inc.
2005-04-11 15:15:03 +00:00
Poul-Henning Kamp
119798b384 Add VOP_FOO_APV() which takes a pointer to the vop_vector.
This allows stacked or partitioned filesystems to say "Continue
the normal resolution from here", for instace from FFS to UFS.

Use VNASSERT() instead of KASSERT().
2005-02-08 12:54:32 +00:00
Poul-Henning Kamp
de8a6c067a Get rid of the VDESC() macro while the pot is boiling anyway, it is
only used from generate files now, so we might as well generate the
right stuff from the start.
2005-01-13 08:05:20 +00:00
Poul-Henning Kamp
63f89abf4a Change the generated VOP_ macro implementations to improve type checking
and KASSERT coverage.

After this check there is only one "nasty" cast in this code but there
is a KASSERT to protect against the wrong argument structure behind
that cast.

Un-inlining the meat of VOP_FOO() saves 35kB of text segment on a typical
kernel with no change in performance.

We also now run the checking and tracing on VOP's which have been layered
by nullfs, umapfs, deadfs or unionfs.

    Add new (non-inline) VOP_FOO_AP() functions which take a "struct
    foo_args" argument and does everything the VOP_FOO() macros
    used to do with checks and debugging code.

    Add KASSERT to VOP_FOO_AP() check for argument type being
    correct.

    Slim down VOP_FOO() inline functions to just stuff arguments
    into the struct foo_args and call VOP_FOO_AP().

    Put function pointer to VOP_FOO_AP() into vop_foo_desc structure
    and make VCALL() use it instead of the current offsetoff() hack.

    Retire vcall() which implemented the offsetoff()

    Make deadfs and unionfs use VOP_FOO_AP() calls instead of
    VCALL(), we know which specific call we want already.

    Remove unneeded arguments to VCALL() in nullfs and umapfs bypass
    functions.

    Remove unused vdesc_offset and VOFFSET().

    Generally improve style/readability of the generated code.
2005-01-13 07:53:01 +00:00
Warner Losh
60727d8b86 /* -> /*- for license, minor formatting changes 2005-01-07 02:29:27 +00:00
Warner Losh
57c75b8f1a Rather than casting through a (void *) to avoid the aliasing warning,
do things correctly from an aliasing perspective.  Put the
vop_generic_args element as the first element for all the vop_*_args
and adjust the code to take the address of that instead of the
structure.

OK'd based on a vague description by: phk
2004-12-13 07:23:34 +00:00
Warner Losh
98a67cd840 Cast from the specific vop_*_args to vop_generic_args via a (void *)
pointer to eliminate the hundreds of warnings that we have in tree at
the moment.

# Chances are good that all the struct vop_*_args should have, as its
# first element, the struct vop_generic_args, and when necessary to
# reference it, we just take its address rather than going through
# this double case.
2004-12-13 06:13:52 +00:00
Poul-Henning Kamp
aec0fb7b40 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
Poul-Henning Kamp
be392b4025 emit a "typedef vop_foo_t(struct vop_foo_args *);" which we can use
to prototype VOP functions with.
2004-12-01 11:51:20 +00:00
Warner Losh
82c6e87991 Remove advertising clause from University of California Regent's license,
per letter dated July 22, 1999.

Approved by: core
2004-04-07 04:19:52 +00:00
Don Lewis
7144b1d4bd Don't check the state of the vnode interlock if the specification says
that the lock should not be checked.

Skip the lock assertion checks for *vpp or any other pointer to a vnode
pointer if vpp (or equivalent) is NULL.
2003-06-22 21:20:06 +00:00
Stefan Eßer
86ed89620e The assertions generated to test VFS locking never included checks
for vnodes reached through double indirection (i.e. **vpp). This
is worked-around by special-casing the identifier "vpp" (adding one
level of indirection).

The alternative fix mentioned in the PR had required substantial
changes to this script.

In case there are locking violations that had been hidden without
this patch, they may suddenly show up, now ...

This change does not affect code compiled without DEBUG_VFS_LOCKS.

PR:		kern/46652
2003-06-20 12:15:37 +00:00
Jeff Roberson
6423c9433c - Move ASSERT_VOP_*LOCK* functionality into functions in vfs_subr.c
- Make the VI asserts more orthogonal to the rest of the asserts by using a
   new, common vfs_badlock() function and adding a 'str' arg.
 - Adjust generated ASSERTS to match the new prototype.
 - Adjust explicit ASSERTS to match the new prototype.
2002-09-26 04:48:44 +00:00
Jeff Roberson
155974701d - Automatically generate and insert KTR points in all VOPs. 2002-09-23 05:50:07 +00:00
Jeff Roberson
71ea4ba57c - Add two new debugging macros: ASSERT_VI_LOCKED and ASSERT_VI_UNLOCKED
- Use the new VI asserts in place of the old mtx_assert checks.
 - Add the VI asserts to the automated lock checking in the VOP calls.  The
   interlock should not be held across vops with a few exceptions.
 - Add the vop_(un)lock_{pre,post} functions to assert that interlock is held
   when LK_INTERLOCK is set.
2002-08-21 06:19:29 +00:00
Jeff Roberson
cf409a0a98 - Add automatic post vop debug checks. These work in both the success and
failure cases.
2002-07-30 08:52:00 +00:00
Jeff Roberson
5c08ffed5d - Use 'options DEBUG_VFS_LOCKS' instead of the DEBUG_ALL_VFS_LOCKS
environment variable to enable the lock verifiction code.
2002-07-07 06:39:36 +00:00
Jeff Roberson
d1376090b2 Add a new configuration directive that inserts calls to debugging functions
in the VOP inlines.  This is intended to replace the simple locking
specifications for calls that have more complicated behavior such as rename and
lookup.

The syntax of the new entries is:
#! name	pre/post	function

If the function is marked 'pre' it is executed prior to calling the VOP and
takes a pointer to a struct vop_{name}_args as it's only parameter.

If the function is marked 'post' it is executed after the VOP call and takes
a pointer to a struct vop_{name}_args as it's first parameter and the integer
return value from the vop as the second paramter.
2002-07-06 03:46:36 +00:00
Jeff Roberson
ef317162da include systm.h in vnode_if.c so that panic is defined when we're doing
DEBUG_ALL_VFS_LOCKS.
2002-05-04 02:35:13 +00:00
David E. O'Brien
fda3199fb9 Return vnode_if back to its AWK roots.
It became a Perl script in rev 1.20.  This removes one more dependence
on perl for the kernel build.
2002-03-01 01:20:23 +00:00
Mike Silbersack
a262ae8267 Throw the $FreeBSD$s back in, properly escaping them. 2002-01-04 05:27:47 +00:00
Mike Silbersack
91ea78c52a Remove $FreeBSD$s from previous commit; perl thinks that they're
something to be interpreted.  Urk.
2002-01-04 01:40:50 +00:00
Mike Silbersack
cd6fdcb9ac Solve vnode_if.pl's identity crisis; make sure that it refers to itself
as vnode_if.pl instead of vnode_if.sh.

PR:		33509
MFC after:	3 weeks
2002-01-03 21:53:09 +00:00
Julian Elischer
b40ce4165d KSE Milestone 2
Note ALL MODULES MUST BE RECOMPILED
make the kernel aware that there are smaller units of scheduling than the
process. (but only allow one thread per process at this time).
This is functionally equivalent to teh previousl -current except
that there is a thread associated with each process.

Sorry john! (your next MFC will be a doosie!)

Reviewed by: peter@freebsd.org, dillon@freebsd.org

X-MFC after:    ha ha ha ha
2001-09-12 08:38:13 +00:00
Alfred Perlstein
ec4dff5e50 replace calls to non-existant bail() subroutine with calls to
the die() builtin function.
2001-03-23 11:48:50 +00:00
Peter Wemm
7ca7bbb36b Simplify this a bit so that it doesn't have to generate silly redundant
__P() prototypes when an ansi-style static inline is a prototype already.
Since vnode_if.[ch] are generated on the fly, there are no CVS diffs to
mess up.
2000-12-06 06:59:38 +00:00
Alfred Perlstein
35b1da8080 remove crufty exec stuff, perl is in the base system
make it work with warnings on (there was some harmless use of uninitialized
variables)
make it work with 'use strict'

Approved by: peter
2000-06-27 19:09:55 +00:00
Peter Wemm
6f77b2defc Use a seperate -c and -h mode. The vnode_if.c file is compiled only into
the kernel while the vnode_if.h header is a bunch of inlines to call the
code that is in the kernel. Generating the .h file on the fly is kinda
bogus because it has to match the one compiled into the kernel.

IMHO we should have kern/vnode_if.c and sys/vnode_if.h committed in the
tree but that's another battle.
1999-12-12 16:43:05 +00:00
Eivind Eklund
3176a7fe12 Update this to be able to output ASSERT_VOP_(UN)LOCKED() based on the
lock specifications in kern/vnode_if.src.  At present, this do not
distinguish between exclusive and shared locks, and the kernel is so full
of bugs in this area that running with auto-generation of assertions
enabled makes DEBUG_VFS_LOCKS totally useless for anybody that has used it
for anything prior to outputting automated assertions.  Due to this, I made
vnode_if.sh only output locking assertions if you have the environment
variable DEBUG_ALL_VFS_LOCKS set to "YES".  In order to actually use the
assertions, you need to also add "options DEBUG_VFS_LOCKS" to your kernel
config file.

Urged to commit by:	phk
1999-09-26 18:31:51 +00:00
Peter Wemm
c3aac50f28 $Id$ -> $FreeBSD$ 1999-08-28 01:08:13 +00:00
Kirk McKusick
f9c8cab591 Add a vnode argument to VOP_BWRITE to get rid of the last vnode
operator special case. Delete special case code from vnode_if.sh,
vnode_if.src, umap_vnops.c, and null_vnops.c.
1999-06-16 23:27:55 +00:00
Bruce Evans
4adbda97dc Declare static __inline functions as __inline in their forward
declaration.

Fixed some comments.

Fixed a staticization botch.
1999-02-28 11:30:00 +00:00
Peter Wemm
4e61198e8f Make the vnode opv vector construction fully dynamic. Previously we
leaked memory on each unload and were limited to items referenced in
the kernel copy of vnode_if.c.  Now a kernel module is free to create
it's own VOP_FOO() routines and the rest of the system will happily
deal with it, including passthrough layers like union/umap/etc.

Have VFS_SET() call a common vfs_modevent() handler rather than
inline duplicating the common code all over the place.

Have VNODEOP_SET() have the vnodeops removed at unload time (assuming a
module) so that the vop_t ** vector is reclaimed.

Slightly adjust the vop_t ** vectors so that calling slot 0 is a panic
rather than a page fault.  This could happen if VOP_something() was called
without *any* handlers being present anywhere (including in vfs_default.c).
slot 1 becomes the default vector for the vnodeop table.

TODO: reclaim zones on unload (eg: nfs code)
1998-11-10 09:04:09 +00:00
Julian Elischer
fd5d1124e2 VOP_STRATEGY grows an (struct vnode *) argument
as the value in b_vp is often not really what you want.
(and needs to be frobbed). more cleanups will follow this.
Reviewed by: Bruce Evans <bde@freebsd.org>
1998-07-04 20:45:42 +00:00
Bruce Evans
214279cec9 Use __inline instead of inline to prevent pedantic compiler warnings. 1997-12-19 23:25:16 +00:00
Bruce Evans
55b211e3af Removed unused #includes. 1997-10-28 15:59:26 +00:00
Poul-Henning Kamp
bf1d104a34 3 lines of code and updates to a number of comments.
Reviewed by:	phk
Submitted by:	 Terry Lambert <tlambert@primenet.com>
1997-09-10 20:11:02 +00:00
Peter Wemm
6875d25465 Back out part 1 of the MCFH that changed $Id$ to $FreeBSD$. We are not
ready for it yet.
1997-02-22 09:48:43 +00:00
Jordan K. Hubbard
1130b656e5 Make the long-awaited change from $Id$ to $FreeBSD$
This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.

Boy, I'm glad we're not using sup anymore.  This update would have been
insane otherwise.
1997-01-14 07:20:47 +00:00
Poul-Henning Kamp
f708ef1b9e Another mega commit to staticize things. 1995-12-14 09:55:16 +00:00
Bruce Evans
40560c4471 Don't #include vm stuff in vnode_if.[ch]. Enough vm stuff (a
single typedef) is now declared in <sys/types.h>.

This is the first of 4 commits that will remove some excessive
includes of vm*.h and user.h.  The total speed improvement isn't
as large as I first thought.  `make depend; make' for LINT only
improved from 2180 seconds to 2108 seconds user time.
1995-12-06 23:33:39 +00:00
Poul-Henning Kamp
a98ca4699e Second batch of cleanup changes.
This time mostly making a lot of things static and some unused
variables here and there.
1995-10-29 15:33:36 +00:00