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/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (c) 2001 Dag-Erling Coïdan Smørgrav
* 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
* in this position and unchanged.
* 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*
* $FreeBSD$
*/
#ifndef _PSEUDOFS_INTERNAL_H_INCLUDED
#define _PSEUDOFS_INTERNAL_H_INCLUDED
/*
* Sysctl subtree
*/
SYSCTL_DECL(_vfs_pfs);
/*
* Vnode data
*/
struct pfs_vdata {
struct pfs_node *pvd_pn;
pid_t pvd_pid;
struct vnode *pvd_vnode;
struct pfs_vdata*pvd_prev, *pvd_next;
int pvd_dead:1;
};
/*
* Vnode cache
*/
void pfs_vncache_load (void);
void pfs_vncache_unload (void);
int pfs_vncache_alloc (struct mount *, struct vnode **,
struct pfs_node *, pid_t pid);
int pfs_vncache_free (struct vnode *);
/*
* File number bitmap
*/
void pfs_fileno_init (struct pfs_info *);
void pfs_fileno_uninit (struct pfs_info *);
void pfs_fileno_alloc (struct pfs_node *);
void pfs_fileno_free (struct pfs_node *);
/*
* Debugging
*/
#ifdef PSEUDOFS_TRACE
extern int pfs_trace;
#define PFS_TRACE(foo) \
do { \
if (pfs_trace) { \
printf("%s(): line %d: ", __func__, __LINE__); \
printf foo ; \
printf("\n"); \
} \
} while (0)
#define PFS_RETURN(err) \
do { \
if (pfs_trace) { \
printf("%s(): line %d: returning %d\n", \
__func__, __LINE__, err); \
} \
return (err); \
} while (0)
#else
#define PFS_TRACE(foo) \
do { /* nothing */ } while (0)
#define PFS_RETURN(err) \
return (err)
#endif
/*
* Inline helpers for locking
*/
static inline void
pfs_lock(struct pfs_node *pn)
{
mtx_lock(&pn->pn_mutex);
}
static inline void
pfs_unlock(struct pfs_node *pn)
{
mtx_unlock(&pn->pn_mutex);
}
static inline void
pfs_assert_owned(struct pfs_node *pn)
{
mtx_assert(&pn->pn_mutex, MA_OWNED);
}
static inline void
pfs_assert_not_owned(struct pfs_node *pn)
{
mtx_assert(&pn->pn_mutex, MA_NOTOWNED);
}
static inline int
pn_fill(PFS_FILL_ARGS)
{
PFS_TRACE(("%s", pn->pn_name));
KASSERT(pn->pn_fill != NULL, ("%s(): no callback", __func__));
if (p != NULL) {
PROC_LOCK_ASSERT(p, MA_NOTOWNED);
PROC_ASSERT_HELD(p);
}
pfs_assert_not_owned(pn);
return ((pn->pn_fill)(PFS_FILL_ARGNAMES));
}
static inline int
pn_attr(PFS_ATTR_ARGS)
{
PFS_TRACE(("%s", pn->pn_name));
KASSERT(pn->pn_attr != NULL, ("%s(): no callback", __func__));
if (p != NULL)
PROC_LOCK_ASSERT(p, MA_OWNED);
pfs_assert_not_owned(pn);
return ((pn->pn_attr)(PFS_ATTR_ARGNAMES));
}
static inline int
pn_vis(PFS_VIS_ARGS)
{
PFS_TRACE(("%s", pn->pn_name));
KASSERT(pn->pn_vis != NULL, ("%s(): no callback", __func__));
KASSERT(p != NULL, ("%s(): no process", __func__));
PROC_LOCK_ASSERT(p, MA_OWNED);
pfs_assert_not_owned(pn);
return ((pn->pn_vis)(PFS_VIS_ARGNAMES));
}
static inline int
pn_ioctl(PFS_IOCTL_ARGS)
{
PFS_TRACE(("%s", pn->pn_name));
KASSERT(pn->pn_ioctl != NULL, ("%s(): no callback", __func__));
if (p != NULL)
PROC_LOCK_ASSERT(p, MA_OWNED);
pfs_assert_not_owned(pn);
return ((pn->pn_ioctl)(PFS_IOCTL_ARGNAMES));
}
static inline int
pn_getextattr(PFS_GETEXTATTR_ARGS)
{
PFS_TRACE(("%s", pn->pn_name));
KASSERT(pn->pn_getextattr != NULL, ("%s(): no callback", __func__));
if (p != NULL)
PROC_LOCK_ASSERT(p, MA_OWNED);
pfs_assert_not_owned(pn);
return ((pn->pn_getextattr)(PFS_GETEXTATTR_ARGNAMES));
}
static inline int
pn_close(PFS_CLOSE_ARGS)
{
PFS_TRACE(("%s", pn->pn_name));
KASSERT(pn->pn_close != NULL, ("%s(): no callback", __func__));
if (p != NULL)
PROC_LOCK_ASSERT(p, MA_OWNED);
pfs_assert_not_owned(pn);
return ((pn->pn_close)(PFS_CLOSE_ARGNAMES));
}
static inline int
pn_destroy(PFS_DESTROY_ARGS)
{
PFS_TRACE(("%s", pn->pn_name));
KASSERT(pn->pn_destroy != NULL, ("%s(): no callback", __func__));
pfs_assert_not_owned(pn);
return ((pn->pn_destroy)(PFS_DESTROY_ARGNAMES));
}
#endif
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