1 /*- 2 * Copyright (c) 2003 Poul-Henning Kamp 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 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. The names of the authors may not be used to endorse or promote 14 * products derived from this software without specific prior written 15 * permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD$ 30 */ 31 32 #include <stdio.h> 33 #include <fcntl.h> 34 #include <errno.h> 35 #include <stdint.h> 36 #include <sys/types.h> 37 #include <stdarg.h> 38 #include <string.h> 39 #include <stdlib.h> 40 #include <paths.h> 41 42 #include <sys/queue.h> 43 44 #define GEOM_CTL_TABLE 1 45 #include <libgeom.h> 46 47 #include <geom/geom_ext.h> 48 49 void 50 geom_ctl_dump(struct geom_ctl_req *req, FILE *f) 51 { 52 u_int i; 53 int j; 54 struct geom_ctl_req_arg *ap; 55 56 if (req == NULL) { 57 fprintf(f, "Dump of geom_ctl request at NULL\n"); 58 return; 59 } 60 fprintf(f, "Dump of geom_ctl %s request at %p:\n", req->reqt->name, req); 61 if (req->error != NULL) 62 fprintf(f, " error:\t\"%s\"\n", req->error); 63 else 64 fprintf(f, " error:\tNULL\n"); 65 for (i = 0; i < req->narg; i++) { 66 ap = &req->arg[i]; 67 if (ap->name != NULL) 68 fprintf(f, " param:\t\"%s\"", ap->name); 69 else 70 fprintf(f, " meta:\t@%jd", (intmax_t)ap->offset); 71 fflush(f); 72 if (ap->len < 0) 73 fprintf(f, " = [%d] \"%s\"", -ap->len, (char *)ap->value); 74 else if (ap->len > 0) { 75 fprintf(f, " = [%d]", ap->len); 76 fflush(f); 77 for (j = 0; j < ap->len; j++) { 78 fprintf(f, " %02x", ((u_char *)ap->value)[j]); 79 } 80 } else { 81 fprintf(f, " = [0] %p", ap->value); 82 } 83 fprintf(f, "\n"); 84 } 85 } 86 87 static void 88 geom_ctl_set_error(struct geom_ctl_req *req, const char *error, ...) 89 { 90 va_list ap; 91 92 if (req->error != NULL) 93 return; 94 va_start(ap, error); 95 vasprintf(&req->error, error, ap); 96 } 97 98 static void 99 geom_ctl_check_alloc(struct geom_ctl_req *req, void *ptr) 100 { 101 if (ptr != NULL) 102 return; 103 geom_ctl_set_error(req, "Could not allocate memory"); 104 } 105 106 struct geom_ctl_req * 107 geom_ctl_get_handle(enum geom_ctl_request req) 108 { 109 struct geom_ctl_req_table *gtp; 110 struct geom_ctl_req *rp; 111 112 rp = calloc(1, sizeof *rp); 113 if (rp == NULL) 114 return (NULL); 115 for (gtp = gcrt; gtp->request != req; gtp++) 116 if (gtp->request == GEOM_INVALID_REQUEST) 117 break; 118 119 rp->request = req; 120 rp->reqt = gtp; 121 if (rp->reqt->request == GEOM_INVALID_REQUEST) 122 geom_ctl_set_error(rp, "Invalid request"); 123 return (rp); 124 } 125 126 void 127 geom_ctl_set_param(struct geom_ctl_req *req, const char *name, int len, void* value) 128 { 129 struct geom_ctl_req_arg *ap; 130 131 if (req == NULL || req->error != NULL) 132 return; 133 if (req->reqt->params == 0) 134 geom_ctl_set_error(req, "Request takes no parameters"); 135 req->narg++; 136 req->arg = realloc(req->arg, sizeof *ap * req->narg); 137 geom_ctl_check_alloc(req, req->arg); 138 if (req->arg != NULL) { 139 ap = req->arg + (req->narg - 1); 140 memset(ap, 0, sizeof *ap); 141 ap->name = strdup(name); 142 geom_ctl_check_alloc(req, ap->name); 143 ap->nlen = strlen(ap->name); 144 ap->len = len; 145 if (len > 0) { 146 ap->value = value; 147 } else if (len < 0) { 148 ap->len = -strlen(value); 149 ap->value = strdup(value); 150 } else { 151 ap->value = value; 152 } 153 if (len != 0) 154 geom_ctl_check_alloc(req, ap->value); 155 } else { 156 req->narg = 0; 157 } 158 } 159 160 void 161 geom_ctl_set_meta(struct geom_ctl_req *req, off_t offset, u_int len, void* value) 162 { 163 struct geom_ctl_req_arg *ap; 164 u_int i; 165 166 if (req == NULL || req->error != NULL) 167 return; 168 if (req->reqt->meta == 0) 169 geom_ctl_set_error(req, "Request takes no meta data"); 170 for (i = 0; i < req->narg; i++) { 171 ap = &req->arg[i]; 172 if (ap->name != NULL) 173 continue; 174 if (ap->offset >= offset + len) 175 continue; 176 if (ap->offset + ap->len <= offset) 177 continue; 178 geom_ctl_set_error(req, "Overlapping meta data"); 179 return; 180 } 181 req->narg++; 182 req->arg = realloc(req->arg, sizeof *ap * req->narg); 183 geom_ctl_check_alloc(req, req->arg); 184 if (req->arg != NULL) { 185 ap = req->arg + (req->narg - 1); 186 memset(ap, 0, sizeof *ap); 187 ap->value = value; 188 ap->offset = offset; 189 ap->len = len; 190 } else { 191 req->narg = 0; 192 } 193 } 194 195 const char * 196 geom_ctl_issue(struct geom_ctl_req *req) 197 { 198 int fd, error; 199 200 if (req == NULL) 201 return ("NULL request pointer"); 202 if (req->error != NULL) 203 return (req->error); 204 205 req->version = GEOM_CTL_VERSION; 206 req->lerror = BUFSIZ; /* XXX: arbitrary number */ 207 req->error = malloc(req->lerror); 208 memset(req->error, 0, req->lerror); 209 req->lerror--; 210 fd = open(_PATH_DEV PATH_GEOM_CTL, O_RDONLY); 211 if (fd < 0) 212 return(strerror(errno)); 213 error = ioctl(fd, GEOM_CTL, req); 214 if (error && errno == EINVAL && req->error[0] != '\0') 215 return (req->error); 216 if (error != 0) 217 return(strerror(errno)); 218 return (NULL); 219 } 220 221 void 222 geom_ctl_free(struct geom_ctl_req *req) 223 { 224 u_int i; 225 226 for (i = 0; i < req->narg; i++) { 227 if (req->arg[i].name != NULL) 228 free(req->arg[i].name); 229 if (req->arg[i].len < 0) 230 free(req->arg[i].value); 231 } 232 if (req->error != NULL) 233 free(req->error); 234 free(req->arg); 235 free(req); 236 } 237 238