freebsd-dev/sys/kern/vnode_if.src

#-
# 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 in lines starting with %%
# 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-coded in vnode_if.awk !
#
# Lines starting with %! specify a pre or post-condition function
# to call before/after the vop call.
#
# 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()".
#

vop_islocked {
	IN struct vnode *vp;
};

%% lookup	dvp	L L L
%% lookup	vpp	- L -

# 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 L 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 struct file *fp;
};


%% close	vp	L L L

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 accmode_t accmode;
	IN struct ucred *cred;
	IN struct thread *td;
};


%% accessx	vp	L L L

vop_accessx {
	IN struct vnode *vp;
	IN accmode_t accmode;
	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;
};


%% setattr	vp	E E E
%! setattr	post	vop_setattr_post

vop_setattr {
	IN struct vnode *vp;
	IN struct vattr *vap;
	IN struct ucred *cred;
};

%% markatime	vp	L L L

vop_markatime {
	IN struct vnode *vp;
};

%% read		vp	L L L

vop_read {
	IN struct vnode *vp;
	INOUT struct uio *uio;
	IN int ioflag;
	IN struct ucred *cred;
};


%% write	vp	L L L
%! 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;
};


%% ioctl	vp	U U U

vop_ioctl {
	IN struct vnode *vp;
	IN u_long command;
	IN void *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	L L L

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	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;
};


%! lock1	pre	vop_lock_pre
%! lock1	post	vop_lock_post

vop_lock1 {
	IN struct vnode *vp;
	IN int flags;
	IN char *file;
	IN int line;
};


%! unlock	pre	vop_unlock_pre
%! unlock	post	vop_unlock_post

vop_unlock {
	IN struct vnode *vp;
	IN int flags;
};


%% 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 void *id;
	IN int op;
	IN struct flock *fl;
	IN int flags;
};


%% advlockasync	vp	U U U

vop_advlockasync {
	IN struct vnode *vp;
	IN void *id;
	IN int op;
	IN struct flock *fl;
	IN int flags;
	IN struct task *task;	
	INOUT void **cookiep;
};


%% advlockpurge	vp	E E E

vop_advlockpurge {
	IN struct vnode *vp;
};


%% 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	L L L

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
%! deleteextattr	post	vop_deleteextattr_post

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
%! setextattr	post	vop_setextattr_post

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;
};


%% vptofh	vp	= = =

vop_vptofh {
	IN struct vnode *vp;
	IN struct fid *fhp;
};


%% vptocnp		vp	L L L
%% vptocnp		vpp	- U -

vop_vptocnp {
	IN struct vnode *vp;
	OUT struct vnode **vpp;
	IN struct ucred *cred;
	INOUT char *buf;
	INOUT int *buflen;
};


%% allocate	vp	E E E

vop_allocate {
	IN struct vnode *vp;
	INOUT off_t *offset;
	INOUT off_t *len;
};

%% advise	vp	U U U

vop_advise {
	IN struct vnode *vp;
	IN off_t start;
	IN off_t end;
	IN int advice;
};

%% unp_bind	vp	E E E

vop_unp_bind {
	IN struct vnode *vp;
	IN struct socket *socket;
};

%% unp_connect	vp	L L L

vop_unp_connect {
	IN struct vnode *vp;
	OUT struct socket **socket;
};

%% unp_detach	vp	= = =

vop_unp_detach {
	IN struct vnode *vp;
};

%% is_text	vp	L L L

vop_is_text {
	IN struct vnode *vp;
};

%% set_text	vp	E E E

vop_set_text {
	IN struct vnode *vp;
};

%% vop_unset_text	vp	E E E

vop_unset_text {
	IN struct vnode *vp;
};

%% get_writecount	vp	L L L

vop_get_writecount {
	IN struct vnode *vp;
	OUT int *writecount;
};

%% add_writecount	vp	E E E

vop_add_writecount {
	IN struct vnode *vp;
	IN int inc;
};

# The VOPs below are spares at the end of the table to allow new VOPs to be
# added in stable branches without breaking the KBI.  New VOPs in HEAD should
# be added above these spares.  When merging a new VOP to a stable branch,
# the new VOP should replace one of the spares.

vop_spare1 {
	IN struct vnode *vp;
};

vop_spare2 {
	IN struct vnode *vp;
};

vop_spare3 {
	IN struct vnode *vp;
};

vop_spare4 {
	IN struct vnode *vp;
};

vop_spare5 {
	IN struct vnode *vp;
};