1 /* $NetBSD: subr.c,v 1.4 2010/09/03 07:15:18 manu Exp $ */ 2 3 /*- 4 * Copyright (c) 2010 Emmanuel Dreyfus. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 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 * 15 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 16 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 17 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 18 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 19 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 25 * POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #include <stdio.h> 29 #include <stdlib.h> 30 #include <err.h> 31 #include <errno.h> 32 #include <sysexits.h> 33 #include <syslog.h> 34 #include <puffs.h> 35 #include <paths.h> 36 37 #include "perfuse_priv.h" 38 39 struct puffs_node * 40 perfuse_new_pn(pu, parent) 41 struct puffs_usermount *pu; 42 struct puffs_node *parent; 43 { 44 struct puffs_node *pn; 45 struct perfuse_node_data *pnd; 46 47 if ((pnd = malloc(sizeof(*pnd))) == NULL) 48 DERR(EX_OSERR, "malloc failed"); 49 50 if ((pn = puffs_pn_new(pu, pnd)) == NULL) 51 DERR(EX_SOFTWARE, "puffs_pn_new failed"); 52 53 (void)memset(pnd, 0, sizeof(*pnd)); 54 pnd->pnd_rfh = FUSE_UNKNOWN_FH; 55 pnd->pnd_wfh = FUSE_UNKNOWN_FH; 56 pnd->pnd_ino = PERFUSE_UNKNOWN_INO; 57 pnd->pnd_nlookup = 1; 58 pnd->pnd_parent = parent; 59 TAILQ_INIT(&pnd->pnd_pcq); 60 61 if (parent != NULL) 62 PERFUSE_NODE_DATA(parent)->pnd_childcount++; 63 64 return pn; 65 } 66 67 void 68 perfuse_destroy_pn(pn) 69 struct puffs_node *pn; 70 { 71 struct perfuse_node_data *pnd; 72 73 if ((pnd = puffs_pn_getpriv(pn)) != NULL) { 74 if (pnd->pnd_parent != NULL) 75 PERFUSE_NODE_DATA(pnd->pnd_parent)->pnd_childcount--; 76 77 if (pnd->pnd_dirent != NULL) 78 free(pnd->pnd_dirent); 79 80 if (pnd->pnd_all_fd != NULL) 81 free(pnd->pnd_all_fd); 82 #ifdef PERFUSE_DEBUG 83 if (pnd->pnd_flags & PND_OPEN) 84 DERRX(EX_SOFTWARE, "%s: file open", __func__); 85 86 if (!TAILQ_EMPTY(&pnd->pnd_pcq)) 87 DERRX(EX_SOFTWARE, "%s: non empty pnd_pcq", __func__); 88 #endif /* PERFUSE_DEBUG */ 89 90 free(pnd); 91 } 92 93 puffs_pn_remove(pn); 94 95 return; 96 } 97 98 99 void 100 perfuse_new_fh(opc, fh, mode) 101 puffs_cookie_t opc; 102 uint64_t fh; 103 int mode; 104 { 105 struct perfuse_node_data *pnd; 106 107 pnd = PERFUSE_NODE_DATA(opc); 108 109 if (mode & FWRITE) { 110 if (pnd->pnd_flags & PND_WFH) 111 DERRX(EX_SOFTWARE, "%s: opc = %p, write fh already set", 112 __func__, (void *)opc); 113 pnd->pnd_wfh = fh; 114 pnd->pnd_flags |= PND_WFH; 115 } 116 117 if (mode & FREAD) { 118 if (pnd->pnd_flags & PND_RFH) 119 DERRX(EX_SOFTWARE, "%s: opc = %p, read fh already set", 120 __func__, (void *)opc); 121 pnd->pnd_rfh = fh; 122 pnd->pnd_flags |= PND_RFH; 123 } 124 125 return; 126 } 127 128 void 129 perfuse_destroy_fh(opc, fh) 130 puffs_cookie_t opc; 131 uint64_t fh; 132 { 133 struct perfuse_node_data *pnd; 134 135 pnd = PERFUSE_NODE_DATA(opc); 136 137 if (fh == pnd->pnd_rfh) { 138 if (!(pnd->pnd_flags & PND_RFH) && (fh != FUSE_UNKNOWN_FH)) 139 DERRX(EX_SOFTWARE, 140 "%s: opc = %p, unset rfh = %"PRIx64"", 141 __func__, (void *)opc, fh); 142 pnd->pnd_rfh = FUSE_UNKNOWN_FH; 143 pnd->pnd_flags &= ~PND_RFH; 144 } 145 146 if (fh == pnd->pnd_wfh) { 147 if (!(pnd->pnd_flags & PND_WFH) && (fh != FUSE_UNKNOWN_FH)) 148 DERRX(EX_SOFTWARE, 149 "%s: opc = %p, unset wfh = %"PRIx64"", 150 __func__, (void *)opc, fh); 151 pnd->pnd_wfh = FUSE_UNKNOWN_FH; 152 pnd->pnd_flags &= ~PND_WFH; 153 } 154 155 return; 156 } 157 158 uint64_t 159 perfuse_get_fh(opc, mode) 160 puffs_cookie_t opc; 161 int mode; 162 { 163 struct perfuse_node_data *pnd; 164 165 pnd = PERFUSE_NODE_DATA(opc); 166 167 if (mode & FWRITE) 168 if (pnd->pnd_flags & PND_WFH) 169 return pnd->pnd_wfh; 170 171 if (mode & FREAD) { 172 if (pnd->pnd_flags & PND_RFH) 173 return pnd->pnd_rfh; 174 175 if (pnd->pnd_flags & PND_WFH) 176 return pnd->pnd_wfh; 177 } 178 179 return FUSE_UNKNOWN_FH; 180 } 181 182