From daa779779c50fac88bb9b400c4841a2559f0ce3e Mon Sep 17 00:00:00 2001 From: phk Date: Sun, 23 Mar 2003 10:15:02 +0000 Subject: Add marshalling functions for OAM api. --- lib/libgeom/geom_ctl.c | 237 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 237 insertions(+) create mode 100644 lib/libgeom/geom_ctl.c (limited to 'lib/libgeom/geom_ctl.c') diff --git a/lib/libgeom/geom_ctl.c b/lib/libgeom/geom_ctl.c new file mode 100644 index 0000000..382d75a --- /dev/null +++ b/lib/libgeom/geom_ctl.c @@ -0,0 +1,237 @@ +/*- + * Copyright (c) 2003 Poul-Henning Kamp + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The names of the authors may not be used to endorse or promote + * products derived from this software without specific prior written + * permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#define GEOM_CTL_TABLE 1 +#include + +#include + +void +geom_ctl_dump(struct geom_ctl_req *req, FILE *f) +{ + u_int i; + int j; + struct geom_ctl_req_arg *ap; + + if (req == NULL) { + fprintf(f, "Dump of geom_ctl request at NULL\n"); + return; + } + fprintf(f, "Dump of geom_ctl %s request at %p:\n", req->reqt->name, req); + if (req->error != NULL) + fprintf(f, " error:\t\"%s\"\n", req->error); + else + fprintf(f, " error:\tNULL\n"); + for (i = 0; i < req->narg; i++) { + ap = &req->arg[i]; + if (ap->name != NULL) + fprintf(f, " param:\t\"%s\"", ap->name); + else + fprintf(f, " meta:\t@%jd", (intmax_t)ap->offset); + fflush(f); + if (ap->len < 0) + fprintf(f, " = [%d] \"%s\"", -ap->len, (char *)ap->value); + else if (ap->len > 0) { + fprintf(f, " = [%d]", ap->len); + fflush(f); + for (j = 0; j < ap->len; j++) { + fprintf(f, " %02x", ((u_char *)ap->value)[j]); + } + } else { + fprintf(f, " = [0] %p", ap->value); + } + fprintf(f, "\n"); + } +} + +static void +geom_ctl_set_error(struct geom_ctl_req *req, const char *error, ...) +{ + va_list ap; + + if (req->error != NULL) + return; + va_start(ap, error); + vasprintf(&req->error, error, ap); +} + +static void +geom_ctl_check_alloc(struct geom_ctl_req *req, void *ptr) +{ + if (ptr != NULL) + return; + geom_ctl_set_error(req, "Could not allocate memory"); +} + +struct geom_ctl_req * +geom_ctl_get_handle(enum geom_ctl_request req) +{ + struct geom_ctl_req_table *gtp; + struct geom_ctl_req *rp; + + rp = calloc(1, sizeof *rp); + if (rp == NULL) + return (NULL); + for (gtp = gcrt; gtp->request != req; gtp++) + if (gtp->request == GEOM_INVALID_REQUEST) + break; + + rp->request = req; + rp->reqt = gtp; + if (rp->reqt->request == GEOM_INVALID_REQUEST) + geom_ctl_set_error(rp, "Invalid request"); + return (rp); +} + +void +geom_ctl_set_param(struct geom_ctl_req *req, const char *name, int len, void* value) +{ + struct geom_ctl_req_arg *ap; + + if (req == NULL || req->error != NULL) + return; + if (req->reqt->params == 0) + geom_ctl_set_error(req, "Request takes no parameters"); + req->narg++; + req->arg = realloc(req->arg, sizeof *ap * req->narg); + geom_ctl_check_alloc(req, req->arg); + if (req->arg != NULL) { + ap = req->arg + (req->narg - 1); + memset(ap, 0, sizeof *ap); + ap->name = strdup(name); + geom_ctl_check_alloc(req, ap->name); + ap->nlen = strlen(ap->name); + ap->len = len; + if (len > 0) { + ap->value = value; + } else if (len < 0) { + ap->len = -strlen(value); + ap->value = strdup(value); + } else { + ap->value = value; + } + if (len != 0) + geom_ctl_check_alloc(req, ap->value); + } else { + req->narg = 0; + } +} + +void +geom_ctl_set_meta(struct geom_ctl_req *req, off_t offset, u_int len, void* value) +{ + struct geom_ctl_req_arg *ap; + u_int i; + + if (req == NULL || req->error != NULL) + return; + if (req->reqt->meta == 0) + geom_ctl_set_error(req, "Request takes no meta data"); + for (i = 0; i < req->narg; i++) { + ap = &req->arg[i]; + if (ap->name != NULL) + continue; + if (ap->offset >= offset + len) + continue; + if (ap->offset + ap->len <= offset) + continue; + geom_ctl_set_error(req, "Overlapping meta data"); + return; + } + req->narg++; + req->arg = realloc(req->arg, sizeof *ap * req->narg); + geom_ctl_check_alloc(req, req->arg); + if (req->arg != NULL) { + ap = req->arg + (req->narg - 1); + memset(ap, 0, sizeof *ap); + ap->value = value; + ap->offset = offset; + ap->len = len; + } else { + req->narg = 0; + } +} + +const char * +geom_ctl_issue(struct geom_ctl_req *req) +{ + int fd, error; + + if (req == NULL) + return ("NULL request pointer"); + if (req->error != NULL) + return (req->error); + + req->version = GEOM_CTL_VERSION; + req->lerror = BUFSIZ; /* XXX: arbitrary number */ + req->error = malloc(req->lerror); + memset(req->error, 0, req->lerror); + req->lerror--; + fd = open(_PATH_DEV PATH_GEOM_CTL, O_RDONLY); + if (fd < 0) + return(strerror(errno)); + error = ioctl(fd, GEOM_CTL, req); + if (error && errno == EINVAL && req->error[0] != '\0') + return (req->error); + if (error != 0) + return(strerror(errno)); + return (NULL); +} + +void +geom_ctl_free(struct geom_ctl_req *req) +{ + u_int i; + + for (i = 0; i < req->narg; i++) { + if (req->arg[i].name != NULL) + free(req->arg[i].name); + if (req->arg[i].len < 0) + free(req->arg[i].value); + } + if (req->error != NULL) + free(req->error); + free(req->arg); + free(req); +} + -- cgit v1.1