requests.c revision 1.15
1 /* $NetBSD: requests.c,v 1.15 2007/10/31 16:09:09 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 1.15 2007/10/31 16:09:09 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 puffs_frame pfr; 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, &pfr, sizeof(struct puffs_frame)) == -1) { 77 if (errno == EWOULDBLOCK) 78 return 0; 79 return -1; 80 } 81 buf = malloc(pfr.pfr_alloclen); 82 assert(buf != NULL); /* XXX: a bit more grace here, thanks */ 83 memcpy(buf, &pfr, sizeof(pfr)); 84 85 rlen = pfr.pfr_len - sizeof(pfr); 86 if (read(fd, buf + sizeof(pfr), rlen) != rlen) { /* XXX */ 87 free(buf); 88 return -1; 89 } 90 pgr->pgr_buf = buf; 91 92 return 0; 93 } 94 95 struct puffs_req * 96 puffs_req_get(struct puffs_getreq *pgr) 97 { 98 void *buf; 99 100 buf = pgr->pgr_buf; 101 pgr->pgr_buf = NULL; 102 return buf; 103 } 104 105 int 106 puffs_req_remainingget(struct puffs_getreq *pgr) 107 { 108 109 return pgr->pgr_buf != NULL; 110 } 111 112 /*ARGSUSED*/ 113 void 114 puffs_req_setmaxget(struct puffs_getreq *pgr, int maxops) 115 { 116 117 /* nada */ 118 } 119 120 void 121 puffs_req_destroyget(struct puffs_getreq *pgr) 122 { 123 124 free(pgr->pgr_buf); 125 free(pgr); 126 } 127 128 129 struct puffs_putreq * 130 puffs_req_makeput(struct puffs_usermount *pu) 131 { 132 struct puffs_putreq *ppr; 133 134 ppr = malloc(sizeof(struct puffs_putreq)); 135 if (!ppr) 136 return NULL; 137 memset(ppr, 0, sizeof(*ppr)); 138 139 TAILQ_INIT(&ppr->ppr_pccq); 140 141 ppr->ppr_pu = pu; 142 143 return ppr; 144 } 145 146 void 147 puffs_req_put(struct puffs_putreq *ppr, struct puffs_req *preq) 148 { 149 ssize_t n; 150 151 /* LINTED conversion is benign, says author; may revisit */ 152 preq->preq_frhdr.pfr_len = preq->preq_buflen; 153 n = write(ppr->ppr_pu->pu_fd, preq, preq->preq_frhdr.pfr_len); 154 assert(n == preq->preq_frhdr.pfr_len); 155 } 156 157 /* 158 * instead of a direct preq, put a cc onto the push queue 159 */ 160 void 161 puffs_req_putcc(struct puffs_putreq *ppr, struct puffs_cc *pcc) 162 { 163 164 PU_LOCK(); 165 puffs_req_put(ppr, pcc->pcc_preq); 166 TAILQ_INSERT_TAIL(&ppr->ppr_pccq, pcc, entries); 167 PU_UNLOCK(); 168 } 169 170 /*ARGSUSED*/ 171 int 172 puffs_req_putput(struct puffs_putreq *ppr) 173 { 174 175 return 0; 176 } 177 178 void 179 puffs_req_resetput(struct puffs_putreq *ppr) 180 { 181 struct puffs_cc *pcc; 182 183 PU_LOCK(); 184 while ((pcc = TAILQ_FIRST(&ppr->ppr_pccq)) != NULL) { 185 TAILQ_REMOVE(&ppr->ppr_pccq, pcc, entries); 186 puffs_cc_destroy(pcc); 187 } 188 PU_UNLOCK(); 189 } 190 191 void 192 puffs_req_destroyput(struct puffs_putreq *ppr) 193 { 194 195 puffs_req_resetput(ppr); 196 free(ppr); 197 } 198 199 /*ARGSUSED*/ 200 int 201 puffs_req_handle(struct puffs_getreq *pgr, struct puffs_putreq *ppr, int maxops) 202 { 203 struct puffs_usermount *pu; 204 struct puffs_req *preq; 205 int pval; 206 207 assert(pgr->pgr_pu == ppr->ppr_pu); 208 pu = pgr->pgr_pu; 209 210 if (puffs_req_loadget(pgr) == -1) 211 return -1; 212 213 pval = 0; 214 while ((preq = puffs_req_get(pgr)) != NULL 215 && puffs_getstate(pu) != PUFFS_STATE_UNMOUNTED) 216 pval = puffs_dopreq(pu, preq, ppr); 217 218 return pval; 219 } 220
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