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pseudofs.c
(11.45 KB)
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pseudofs.h
(8.76 KB)
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pseudofs_fileno.c
(4.19 KB)
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pseudofs_internal.h
(5.01 KB)
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pseudofs_vncache.c
(9.47 KB)
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pseudofs_vnops.c
(25 KB)
Editing: pseudofs_internal.h
/*- * 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; SLIST_ENTRY(pfs_vdata) pvd_hash; }; /* * 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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