405c0c04ed
This will be used later in the linsysfs module to filter out VNETs. Reviewed by: des Differential revision: https://reviews.freebsd.org/D39382 MFC after: 1 month
214 lines
5.0 KiB
C
214 lines
5.0 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 2001 Dag-Erling Coïdan Smørgrav
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer
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* in this position and unchanged.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _PSEUDOFS_INTERNAL_H_INCLUDED
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#define _PSEUDOFS_INTERNAL_H_INCLUDED
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/*
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* Sysctl subtree
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*/
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SYSCTL_DECL(_vfs_pfs);
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/*
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* Vnode data
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*/
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struct pfs_vdata {
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struct pfs_node *pvd_pn;
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pid_t pvd_pid;
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struct vnode *pvd_vnode;
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SLIST_ENTRY(pfs_vdata) pvd_hash;
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};
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/*
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* Vnode cache
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*/
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void pfs_vncache_load (void);
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void pfs_vncache_unload (void);
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int pfs_vncache_alloc (struct mount *, struct vnode **,
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struct pfs_node *, pid_t pid);
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int pfs_vncache_free (struct vnode *);
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/*
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* File number bitmap
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*/
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void pfs_fileno_init (struct pfs_info *);
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void pfs_fileno_uninit (struct pfs_info *);
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void pfs_fileno_alloc (struct pfs_node *);
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void pfs_fileno_free (struct pfs_node *);
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/*
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* Debugging
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*/
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#ifdef PSEUDOFS_TRACE
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extern int pfs_trace;
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#define PFS_TRACE(foo) \
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do { \
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if (pfs_trace) { \
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printf("%s(): line %d: ", __func__, __LINE__); \
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printf foo ; \
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printf("\n"); \
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} \
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} while (0)
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#define PFS_RETURN(err) \
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do { \
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if (pfs_trace) { \
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printf("%s(): line %d: returning %d\n", \
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__func__, __LINE__, err); \
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} \
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return (err); \
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} while (0)
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#else
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#define PFS_TRACE(foo) \
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do { /* nothing */ } while (0)
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#define PFS_RETURN(err) \
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return (err)
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#endif
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/*
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* Inline helpers for locking
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*/
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static inline void
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pfs_lock(struct pfs_node *pn)
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{
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mtx_lock(&pn->pn_mutex);
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}
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static inline void
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pfs_unlock(struct pfs_node *pn)
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{
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mtx_unlock(&pn->pn_mutex);
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}
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static inline void
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pfs_assert_owned(struct pfs_node *pn)
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{
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mtx_assert(&pn->pn_mutex, MA_OWNED);
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}
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static inline void
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pfs_assert_not_owned(struct pfs_node *pn)
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{
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mtx_assert(&pn->pn_mutex, MA_NOTOWNED);
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}
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static inline int
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pn_fill(PFS_FILL_ARGS)
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{
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PFS_TRACE(("%s", pn->pn_name));
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KASSERT(pn->pn_fill != NULL, ("%s(): no callback", __func__));
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if (p != NULL) {
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PROC_LOCK_ASSERT(p, MA_NOTOWNED);
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PROC_ASSERT_HELD(p);
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}
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pfs_assert_not_owned(pn);
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return ((pn->pn_fill)(PFS_FILL_ARGNAMES));
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}
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static inline int
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pn_attr(PFS_ATTR_ARGS)
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{
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PFS_TRACE(("%s", pn->pn_name));
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KASSERT(pn->pn_attr != NULL, ("%s(): no callback", __func__));
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if (p != NULL)
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PROC_LOCK_ASSERT(p, MA_OWNED);
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pfs_assert_not_owned(pn);
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return ((pn->pn_attr)(PFS_ATTR_ARGNAMES));
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}
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static inline int
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pn_vis(PFS_VIS_ARGS)
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{
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PFS_TRACE(("%s", pn->pn_name));
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if (pn->pn_vis == NULL)
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return (1);
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if (p != NULL)
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PROC_LOCK_ASSERT(p, MA_OWNED);
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pfs_assert_not_owned(pn);
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return ((pn->pn_vis)(PFS_VIS_ARGNAMES));
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}
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static inline int
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pn_ioctl(PFS_IOCTL_ARGS)
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{
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PFS_TRACE(("%s", pn->pn_name));
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KASSERT(pn->pn_ioctl != NULL, ("%s(): no callback", __func__));
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if (p != NULL)
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PROC_LOCK_ASSERT(p, MA_OWNED);
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pfs_assert_not_owned(pn);
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return ((pn->pn_ioctl)(PFS_IOCTL_ARGNAMES));
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}
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static inline int
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pn_getextattr(PFS_GETEXTATTR_ARGS)
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{
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PFS_TRACE(("%s", pn->pn_name));
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KASSERT(pn->pn_getextattr != NULL, ("%s(): no callback", __func__));
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if (p != NULL)
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PROC_LOCK_ASSERT(p, MA_OWNED);
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pfs_assert_not_owned(pn);
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return ((pn->pn_getextattr)(PFS_GETEXTATTR_ARGNAMES));
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}
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static inline int
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pn_close(PFS_CLOSE_ARGS)
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{
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PFS_TRACE(("%s", pn->pn_name));
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KASSERT(pn->pn_close != NULL, ("%s(): no callback", __func__));
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if (p != NULL)
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PROC_LOCK_ASSERT(p, MA_OWNED);
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pfs_assert_not_owned(pn);
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return ((pn->pn_close)(PFS_CLOSE_ARGNAMES));
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}
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static inline int
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pn_destroy(PFS_DESTROY_ARGS)
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{
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PFS_TRACE(("%s", pn->pn_name));
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KASSERT(pn->pn_destroy != NULL, ("%s(): no callback", __func__));
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pfs_assert_not_owned(pn);
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return ((pn->pn_destroy)(PFS_DESTROY_ARGNAMES));
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}
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#endif
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