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freebsd-skq/sys/kern/vnode_if.src
ssouhlal 0835f7b4a9 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

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#-
# Copyright (c) 1992, 1993
# The Regents of the University of California. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# 4. Neither the name of the University nor the names of its contributors
# may be used to endorse or promote products derived from this software
# without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
# @(#)vnode_if.src 8.12 (Berkeley) 5/14/95
# $FreeBSD$
#
#
# Above each of the vop descriptors is a specification of the locking
# protocol used by each vop call. The first column is the name of
# the variable, the remaining three columns are in, out and error
# respectively. The "in" column defines the lock state on input,
# the "out" column defines the state on succesful return, and the
# "error" column defines the locking state on error exit.
#
# The locking value can take the following values:
# L: locked; not converted to type of lock.
# A: any lock type.
# S: locked with shared lock.
# E: locked with exclusive lock for this process.
# O: locked with exclusive lock for other process.
# U: unlocked.
# -: not applicable. vnode does not yet (or no longer) exists.
# =: the same on input and output, may be either L or U.
# X: locked if not nil.
#
# The paramater named "vpp" is assumed to be always used with double
# indirection (**vpp) and that name is hard-codeed in vnode_if.awk !
#
# If other such parameters are introduced, they have to be added to
# the AWK script at the head of the definition of "add_debug_code()".
#
#
# islocked vp = = =
#
vop_islocked {
IN struct vnode *vp;
IN struct thread *td;
};
#
# lookup dvp L ? ?
# lookup vpp - L -
#! lookup pre vop_lookup_pre
#! lookup post vop_lookup_post
#
# XXX - the lookup locking protocol defies simple description and depends
# on the flags and operation fields in the (cnp) structure. Note
# especially that *vpp may equal dvp and both may be locked.
#
vop_lookup {
IN struct vnode *dvp;
INOUT struct vnode **vpp;
IN struct componentname *cnp;
};
#
#% cachedlookup dvp L ? ?
#% cachedlookup vpp - L -
#
# This must be an exact copy of lookup. See kern/vfs_cache.c for details.
#
vop_cachedlookup {
IN struct vnode *dvp;
INOUT struct vnode **vpp;
IN struct componentname *cnp;
};
#
#% create dvp E E E
#% create vpp - L -
#! create post vop_create_post
#
vop_create {
IN struct vnode *dvp;
OUT struct vnode **vpp;
IN struct componentname *cnp;
IN struct vattr *vap;
};
#
#% whiteout dvp E E E
#
vop_whiteout {
IN struct vnode *dvp;
IN struct componentname *cnp;
IN int flags;
};
#
#% mknod dvp E E E
#% mknod vpp - L -
#! mknod post vop_mknod_post
#
vop_mknod {
IN struct vnode *dvp;
OUT struct vnode **vpp;
IN struct componentname *cnp;
IN struct vattr *vap;
};
#
#% open vp L L L
#
vop_open {
IN struct vnode *vp;
IN int mode;
IN struct ucred *cred;
IN struct thread *td;
IN int fdidx;
};
#
#% close vp E E E
#
vop_close {
IN struct vnode *vp;
IN int fflag;
IN struct ucred *cred;
IN struct thread *td;
};
#
#% access vp L L L
#
vop_access {
IN struct vnode *vp;
IN int mode;
IN struct ucred *cred;
IN struct thread *td;
};
#
#% getattr vp L L L
#
vop_getattr {
IN struct vnode *vp;
OUT struct vattr *vap;
IN struct ucred *cred;
IN struct thread *td;
};
#
#% setattr vp E E E
#! setattr post vop_setattr_post
#
vop_setattr {
IN struct vnode *vp;
IN struct vattr *vap;
IN struct ucred *cred;
IN struct thread *td;
};
#
#% read vp L L L
#
vop_read {
IN struct vnode *vp;
INOUT struct uio *uio;
IN int ioflag;
IN struct ucred *cred;
};
#
#% write vp E E E
#! write pre VOP_WRITE_PRE
#! write post VOP_WRITE_POST
#
vop_write {
IN struct vnode *vp;
INOUT struct uio *uio;
IN int ioflag;
IN struct ucred *cred;
};
#
#% lease vp = = =
#
vop_lease {
IN struct vnode *vp;
IN struct thread *td;
IN struct ucred *cred;
IN int flag;
};
#
#% ioctl vp U U U
#
vop_ioctl {
IN struct vnode *vp;
IN u_long command;
IN caddr_t data;
IN int fflag;
IN struct ucred *cred;
IN struct thread *td;
};
#
#% poll vp U U U
#
vop_poll {
IN struct vnode *vp;
IN int events;
IN struct ucred *cred;
IN struct thread *td;
};
#
#% kqfilter vp U U U
#
vop_kqfilter {
IN struct vnode *vp;
IN struct knote *kn;
};
#
#% revoke vp L L L
#
vop_revoke {
IN struct vnode *vp;
IN int flags;
};
#
#% fsync vp E E E
#
vop_fsync {
IN struct vnode *vp;
IN int waitfor;
IN struct thread *td;
};
#
#% remove dvp E E E
#% remove vp E E E
#! remove post vop_remove_post
#
vop_remove {
IN struct vnode *dvp;
IN struct vnode *vp;
IN struct componentname *cnp;
};
#
#% link tdvp E E E
#% link vp E E E
#! link post vop_link_post
#
vop_link {
IN struct vnode *tdvp;
IN struct vnode *vp;
IN struct componentname *cnp;
};
#
# rename fdvp U U U
# rename fvp U U U
# rename tdvp E U U
# rename tvp X U U
#! rename pre vop_rename_pre
#! rename post vop_rename_post
#
vop_rename {
IN WILLRELE struct vnode *fdvp;
IN WILLRELE struct vnode *fvp;
IN struct componentname *fcnp;
IN WILLRELE struct vnode *tdvp;
IN WILLRELE struct vnode *tvp;
IN struct componentname *tcnp;
};
#
#% mkdir dvp E E E
#% mkdir vpp - E -
#! mkdir post vop_mkdir_post
#
vop_mkdir {
IN struct vnode *dvp;
OUT struct vnode **vpp;
IN struct componentname *cnp;
IN struct vattr *vap;
};
#
#% rmdir dvp E E E
#% rmdir vp E E E
#! rmdir post vop_rmdir_post
#
vop_rmdir {
IN struct vnode *dvp;
IN struct vnode *vp;
IN struct componentname *cnp;
};
#
#% symlink dvp E E E
#% symlink vpp - E -
#! symlink post vop_symlink_post
#
vop_symlink {
IN struct vnode *dvp;
OUT struct vnode **vpp;
IN struct componentname *cnp;
IN struct vattr *vap;
IN char *target;
};
#
#% readdir vp L L L
#
vop_readdir {
IN struct vnode *vp;
INOUT struct uio *uio;
IN struct ucred *cred;
INOUT int *eofflag;
OUT int *ncookies;
INOUT u_long **cookies;
};
#
#% readlink vp L L L
#
vop_readlink {
IN struct vnode *vp;
INOUT struct uio *uio;
IN struct ucred *cred;
};
#
#% inactive vp E E E
#
vop_inactive {
IN struct vnode *vp;
IN struct thread *td;
};
#
#% reclaim vp E E E
#
vop_reclaim {
IN struct vnode *vp;
IN struct thread *td;
};
#
#lock vp ? ? ?
#! lock pre vop_lock_pre
#! lock post vop_lock_post
#
vop_lock {
IN struct vnode *vp;
IN int flags;
IN struct thread *td;
};
#
#unlock vp L ? L
#! unlock pre vop_unlock_pre
#! unlock post vop_unlock_post
#
vop_unlock {
IN struct vnode *vp;
IN int flags;
IN struct thread *td;
};
#
#% bmap vp L L L
#
vop_bmap {
IN struct vnode *vp;
IN daddr_t bn;
OUT struct bufobj **bop;
IN daddr_t *bnp;
OUT int *runp;
OUT int *runb;
};
#
# strategy vp L L L
#! strategy pre vop_strategy_pre
#
vop_strategy {
IN struct vnode *vp;
IN struct buf *bp;
};
#
#% getwritemount vp = = =
#
vop_getwritemount {
IN struct vnode *vp;
OUT struct mount **mpp;
};
#
#% print vp = = =
#
vop_print {
IN struct vnode *vp;
};
#
#% pathconf vp L L L
#
vop_pathconf {
IN struct vnode *vp;
IN int name;
OUT register_t *retval;
};
#
#% advlock vp U U U
#
vop_advlock {
IN struct vnode *vp;
IN caddr_t id;
IN int op;
IN struct flock *fl;
IN int flags;
};
#
#% reallocblks vp E E E
#
vop_reallocblks {
IN struct vnode *vp;
IN struct cluster_save *buflist;
};
#
#% getpages vp L L L
#
vop_getpages {
IN struct vnode *vp;
IN vm_page_t *m;
IN int count;
IN int reqpage;
IN vm_ooffset_t offset;
};
#
#% putpages vp E E E
#
vop_putpages {
IN struct vnode *vp;
IN vm_page_t *m;
IN int count;
IN int sync;
IN int *rtvals;
IN vm_ooffset_t offset;
};
#
#% getacl vp L L L
#
vop_getacl {
IN struct vnode *vp;
IN acl_type_t type;
OUT struct acl *aclp;
IN struct ucred *cred;
IN struct thread *td;
};
#
#% setacl vp E E E
#
vop_setacl {
IN struct vnode *vp;
IN acl_type_t type;
IN struct acl *aclp;
IN struct ucred *cred;
IN struct thread *td;
};
#
#% aclcheck vp = = =
#
vop_aclcheck {
IN struct vnode *vp;
IN acl_type_t type;
IN struct acl *aclp;
IN struct ucred *cred;
IN struct thread *td;
};
#
#% closeextattr vp L L L
#
vop_closeextattr {
IN struct vnode *vp;
IN int commit;
IN struct ucred *cred;
IN struct thread *td;
};
#
#% getextattr vp L L L
#
vop_getextattr {
IN struct vnode *vp;
IN int attrnamespace;
IN const char *name;
INOUT struct uio *uio;
OUT size_t *size;
IN struct ucred *cred;
IN struct thread *td;
};
#
#% listextattr vp L L L
#
vop_listextattr {
IN struct vnode *vp;
IN int attrnamespace;
INOUT struct uio *uio;
OUT size_t *size;
IN struct ucred *cred;
IN struct thread *td;
};
#
#% openextattr vp L L L
#
vop_openextattr {
IN struct vnode *vp;
IN struct ucred *cred;
IN struct thread *td;
};
#
#% deleteextattr vp E E E
#
vop_deleteextattr {
IN struct vnode *vp;
IN int attrnamespace;
IN const char *name;
IN struct ucred *cred;
IN struct thread *td;
};
#
#% setextattr vp E E E
#
vop_setextattr {
IN struct vnode *vp;
IN int attrnamespace;
IN const char *name;
INOUT struct uio *uio;
IN struct ucred *cred;
IN struct thread *td;
};
#
#% setlabel vp E E E
#
vop_setlabel {
IN struct vnode *vp;
IN struct label *label;
IN struct ucred *cred;
IN struct thread *td;
};
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