pseudofs_internal.h revision 168764
1/*- 2 * Copyright (c) 2001 Dag-Erling Co�dan Sm�rgrav 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer 10 * in this position and unchanged. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * $FreeBSD: head/sys/fs/pseudofs/pseudofs_internal.h 168764 2007-04-15 17:10:01Z des $ 29 */ 30 31#ifndef _PSEUDOFS_INTERNAL_H_INCLUDED 32#define _PSEUDOFS_INTERNAL_H_INCLUDED 33 34/* 35 * Sysctl subtree 36 */ 37SYSCTL_DECL(_vfs_pfs); 38 39/* 40 * Vnode data 41 */ 42struct pfs_vdata { 43 struct pfs_node *pvd_pn; 44 pid_t pvd_pid; 45 struct vnode *pvd_vnode; 46 struct pfs_vdata*pvd_prev, *pvd_next; 47 int pvd_dead:1; 48}; 49 50/* 51 * Vnode cache 52 */ 53void pfs_vncache_load (void); 54void pfs_vncache_unload (void); 55int pfs_vncache_alloc (struct mount *, struct vnode **, 56 struct pfs_node *, pid_t pid); 57int pfs_vncache_free (struct vnode *); 58 59/* 60 * File number bitmap 61 */ 62void pfs_fileno_init (struct pfs_info *); 63void pfs_fileno_uninit (struct pfs_info *); 64void pfs_fileno_alloc (struct pfs_node *); 65void pfs_fileno_free (struct pfs_node *); 66 67/* 68 * Debugging 69 */ 70#ifdef PSEUDOFS_TRACE 71extern int pfs_trace; 72 73#define PFS_TRACE(foo) \ 74 do { \ 75 if (pfs_trace) { \ 76 printf("%s(): line %d: ", __func__, __LINE__); \ 77 printf foo ; \ 78 printf("\n"); \ 79 } \ 80 } while (0) 81#define PFS_RETURN(err) \ 82 do { \ 83 if (pfs_trace) { \ 84 printf("%s(): line %d: returning %d\n", \ 85 __func__, __LINE__, err); \ 86 } \ 87 return (err); \ 88 } while (0) 89#else 90#define PFS_TRACE(foo) \ 91 do { /* nothing */ } while (0) 92#define PFS_RETURN(err) \ 93 return (err) 94#endif 95 96/* 97 * Inline helpers for locking 98 */ 99static inline void 100pfs_lock(struct pfs_node *pn) 101{ 102 103 mtx_lock(&pn->pn_mutex); 104} 105 106static inline void 107pfs_unlock(struct pfs_node *pn) 108{ 109 110 mtx_unlock(&pn->pn_mutex); 111} 112 113static inline void 114pfs_assert_owned(struct pfs_node *pn) 115{ 116 117 mtx_assert(&pn->pn_mutex, MA_OWNED); 118} 119 120static inline void 121pfs_assert_not_owned(struct pfs_node *pn) 122{ 123 124 mtx_assert(&pn->pn_mutex, MA_NOTOWNED); 125} 126 127static inline int 128pn_fill(PFS_FILL_ARGS) 129{ 130 131 PFS_TRACE(("%s", pn->pn_name)); 132 KASSERT(pn->pn_fill != NULL, ("%s(): no callback", __func__)); 133 if (p != NULL) { 134 PROC_LOCK_ASSERT(p, MA_NOTOWNED); 135 PROC_ASSERT_HELD(p); 136 } 137 pfs_assert_not_owned(pn); 138 return ((pn->pn_fill)(PFS_FILL_ARGNAMES)); 139} 140 141static inline int 142pn_attr(PFS_ATTR_ARGS) 143{ 144 145 PFS_TRACE(("%s", pn->pn_name)); 146 KASSERT(pn->pn_attr != NULL, ("%s(): no callback", __func__)); 147 if (p != NULL) 148 PROC_LOCK_ASSERT(p, MA_OWNED); 149 pfs_assert_not_owned(pn); 150 return ((pn->pn_attr)(PFS_ATTR_ARGNAMES)); 151} 152 153static inline int 154pn_vis(PFS_VIS_ARGS) 155{ 156 157 PFS_TRACE(("%s", pn->pn_name)); 158 KASSERT(pn->pn_vis != NULL, ("%s(): no callback", __func__)); 159 KASSERT(p != NULL, ("%s(): no process", __func__)); 160 PROC_LOCK_ASSERT(p, MA_OWNED); 161 pfs_assert_not_owned(pn); 162 return ((pn->pn_vis)(PFS_VIS_ARGNAMES)); 163} 164 165static inline int 166pn_ioctl(PFS_IOCTL_ARGS) 167{ 168 169 PFS_TRACE(("%s", pn->pn_name)); 170 KASSERT(pn->pn_ioctl != NULL, ("%s(): no callback", __func__)); 171 if (p != NULL) 172 PROC_LOCK_ASSERT(p, MA_OWNED); 173 pfs_assert_not_owned(pn); 174 return ((pn->pn_ioctl)(PFS_IOCTL_ARGNAMES)); 175} 176 177static inline int 178pn_getextattr(PFS_GETEXTATTR_ARGS) 179{ 180 181 PFS_TRACE(("%s", pn->pn_name)); 182 KASSERT(pn->pn_getextattr != NULL, ("%s(): no callback", __func__)); 183 if (p != NULL) 184 PROC_LOCK_ASSERT(p, MA_OWNED); 185 pfs_assert_not_owned(pn); 186 return ((pn->pn_getextattr)(PFS_GETEXTATTR_ARGNAMES)); 187} 188 189static inline int 190pn_close(PFS_CLOSE_ARGS) 191{ 192 193 PFS_TRACE(("%s", pn->pn_name)); 194 KASSERT(pn->pn_close != NULL, ("%s(): no callback", __func__)); 195 if (p != NULL) 196 PROC_LOCK_ASSERT(p, MA_OWNED); 197 pfs_assert_not_owned(pn); 198 return ((pn->pn_close)(PFS_CLOSE_ARGNAMES)); 199} 200 201static inline int 202pn_destroy(PFS_DESTROY_ARGS) 203{ 204 205 PFS_TRACE(("%s", pn->pn_name)); 206 KASSERT(pn->pn_destroy != NULL, ("%s(): no callback", __func__)); 207 pfs_assert_not_owned(pn); 208 return ((pn->pn_destroy)(PFS_DESTROY_ARGNAMES)); 209} 210 211#endif 212