1 /* $NetBSD: requests.c,v 1.16 2007/11/12 16:39:35 pooka Exp $ */ 2 3 /* 4 * Copyright (c) 2006 Antti Kantee. 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 AUTHOR ``AS IS'' AND ANY EXPRESS 16 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 18 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 #if !defined(lint) 30 __RCSID("$NetBSD: requests.c,v 1.16 2007/11/12 16:39:35 pooka Exp $"); 31 #endif /* !lint */ 32 33 #include <sys/types.h> 34 #include <sys/ioctl.h> 35 #include <sys/queue.h> 36 37 #include <assert.h> 38 #include <errno.h> 39 #include <puffs.h> 40 #include <stdio.h> 41 #include <stdlib.h> 42 #include <unistd.h> 43 44 #include "puffs_priv.h" 45 46 /* 47 * XXX: a lot of this stuff is together just with string and bubblegum now 48 */ 49 50 /*ARGSUSED*/ 51 struct puffs_getreq * 52 puffs_req_makeget(struct puffs_usermount *pu, size_t buflen, int maxops) 53 { 54 struct puffs_getreq *pgr; 55 56 pgr = malloc(sizeof(struct puffs_getreq)); 57 if (!pgr) 58 return NULL; 59 60 pgr->pgr_pu = pu; 61 pgr->pgr_buf = NULL; 62 63 return pgr; 64 } 65 66 int 67 puffs_req_loadget(struct puffs_getreq *pgr) 68 { 69 struct putter_hdr pth; 70 uint8_t *buf; 71 size_t rlen; 72 int fd = pgr->pgr_pu->pu_fd; 73 74 assert(pgr->pgr_buf == NULL); 75 76 if (read(fd, &pth, sizeof(struct putter_hdr)) == -1) { 77 if (errno == EWOULDBLOCK) 78 return 0; 79 return -1; 80 } 81 buf = malloc(PUFFS_MSG_MAXSIZE); /* XXX */ 82 assert(buf != NULL); /* XXX: a bit more grace here, thanks */ 83 memcpy(buf, &pth, sizeof(pth)); 84 85 /* LINTED */ 86 rlen = pth.pth_framelen - sizeof(pth); 87 if (read(fd, buf + sizeof(pth), rlen) != rlen) { /* XXX */ 88 free(buf); 89 return -1; 90 } 91 pgr->pgr_buf = buf; 92 93 return 0; 94 } 95 96 struct puffs_req * 97 puffs_req_get(struct puffs_getreq *pgr) 98 { 99 void *buf; 100 101 buf = pgr->pgr_buf; 102 pgr->pgr_buf = NULL; 103 return buf; 104 } 105 106 int 107 puffs_req_remainingget(struct puffs_getreq *pgr) 108 { 109 110 return pgr->pgr_buf != NULL; 111 } 112 113 /*ARGSUSED*/ 114 void 115 puffs_req_setmaxget(struct puffs_getreq *pgr, int maxops) 116 { 117 118 /* nada */ 119 } 120 121 void 122 puffs_req_destroyget(struct puffs_getreq *pgr) 123 { 124 125 free(pgr->pgr_buf); 126 free(pgr); 127 } 128 129 130 struct puffs_putreq * 131 puffs_req_makeput(struct puffs_usermount *pu) 132 { 133 struct puffs_putreq *ppr; 134 135 ppr = malloc(sizeof(struct puffs_putreq)); 136 if (!ppr) 137 return NULL; 138 memset(ppr, 0, sizeof(*ppr)); 139 140 TAILQ_INIT(&ppr->ppr_pccq); 141 142 ppr->ppr_pu = pu; 143 144 return ppr; 145 } 146 147 void 148 puffs_req_put(struct puffs_putreq *ppr, struct puffs_req *preq) 149 { 150 ssize_t n; 151 152 /* LINTED conversion is benign, says author; may revisit */ 153 preq->preq_pth.pth_framelen = preq->preq_buflen; 154 n = write(ppr->ppr_pu->pu_fd, preq, preq->preq_pth.pth_framelen); 155 assert(n == preq->preq_pth.pth_framelen); 156 } 157 158 /* 159 * instead of a direct preq, put a cc onto the push queue 160 */ 161 void 162 puffs_req_putcc(struct puffs_putreq *ppr, struct puffs_cc *pcc) 163 { 164 165 PU_LOCK(); 166 puffs_req_put(ppr, pcc->pcc_preq); 167 TAILQ_INSERT_TAIL(&ppr->ppr_pccq, pcc, entries); 168 PU_UNLOCK(); 169 } 170 171 /*ARGSUSED*/ 172 int 173 puffs_req_putput(struct puffs_putreq *ppr) 174 { 175 176 return 0; 177 } 178 179 void 180 puffs_req_resetput(struct puffs_putreq *ppr) 181 { 182 struct puffs_cc *pcc; 183 184 PU_LOCK(); 185 while ((pcc = TAILQ_FIRST(&ppr->ppr_pccq)) != NULL) { 186 TAILQ_REMOVE(&ppr->ppr_pccq, pcc, entries); 187 puffs_cc_destroy(pcc); 188 } 189 PU_UNLOCK(); 190 } 191 192 void 193 puffs_req_destroyput(struct puffs_putreq *ppr) 194 { 195 196 puffs_req_resetput(ppr); 197 free(ppr); 198 } 199 200 /*ARGSUSED*/ 201 int 202 puffs_req_handle(struct puffs_getreq *pgr, struct puffs_putreq *ppr, int maxops) 203 { 204 struct puffs_usermount *pu; 205 struct puffs_req *preq; 206 int pval; 207 208 assert(pgr->pgr_pu == ppr->ppr_pu); 209 pu = pgr->pgr_pu; 210 211 if (puffs_req_loadget(pgr) == -1) 212 return -1; 213 214 pval = 0; 215 while ((preq = puffs_req_get(pgr)) != NULL 216 && puffs_getstate(pu) != PUFFS_STATE_UNMOUNTED) 217 pval = puffs_dopreq(pu, preq, ppr); 218 219 return pval; 220 } 221