63728c47e8
Use prefix gctl_ systematically. Add flag with access perms for each argument. Add ro/rw versions of argument building functions. General cleanup.
287 lines
6.6 KiB
C
287 lines
6.6 KiB
C
/*-
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* Copyright (c) 2003 Poul-Henning Kamp
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The names of the authors may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <stdio.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <stdint.h>
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#include <sys/types.h>
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#include <stdarg.h>
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#include <unistd.h>
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#include <string.h>
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#include <stdlib.h>
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#include <paths.h>
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#include <sys/queue.h>
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#define GCTL_TABLE 1
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#include <libgeom.h>
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#include <geom/geom_ext.h>
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void
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gctl_dump(struct gctl_req *req, FILE *f)
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{
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u_int i;
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int j;
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struct gctl_req_arg *ap;
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if (req == NULL) {
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fprintf(f, "Dump of gctl request at NULL\n");
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return;
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}
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fprintf(f, "Dump of gctl %s request at %p:\n", req->reqt->name, req);
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if (req->error != NULL)
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fprintf(f, " error:\t\"%s\"\n", req->error);
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else
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fprintf(f, " error:\tNULL\n");
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for (i = 0; i < req->narg; i++) {
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ap = &req->arg[i];
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if (ap->name != NULL)
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fprintf(f, " param:\t\"%s\"", ap->name);
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else
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fprintf(f, " meta:\t@%jd", (intmax_t)ap->offset);
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fprintf(f, " [%s%s",
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ap->flag & GCTL_PARAM_RD ? "R" : "",
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ap->flag & GCTL_PARAM_WR ? "W" : "");
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fflush(f);
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if (ap->flag & GCTL_PARAM_ASCII)
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fprintf(f, "%d] = \"%s\"", ap->len, (char *)ap->value);
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else if (ap->len > 0) {
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fprintf(f, "%d] = ", ap->len);
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fflush(f);
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for (j = 0; j < ap->len; j++) {
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fprintf(f, " %02x", ((u_char *)ap->value)[j]);
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}
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} else {
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fprintf(f, "0] = %p", ap->value);
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}
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fprintf(f, "\n");
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}
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}
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/*
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* Set an error message, if one does not already exist.
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*/
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static void
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gctl_set_error(struct gctl_req *req, const char *error, ...)
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{
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va_list ap;
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if (req->error != NULL)
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return;
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va_start(ap, error);
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vasprintf(&req->error, error, ap);
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va_end(ap);
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}
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/*
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* Check that a malloc operation succeeded, and set a consistent error
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* message if not.
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*/
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static void
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gctl_check_alloc(struct gctl_req *req, void *ptr)
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{
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if (ptr != NULL)
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return;
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gctl_set_error(req, "Could not allocate memory");
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if (req->error == NULL)
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req->error = "Could not allocate memory";
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}
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/*
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* Allocate a new request handle of the specified type.
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* XXX: Why bother checking the type ?
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*/
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struct gctl_req *
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gctl_get_handle(enum gctl_request req)
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{
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struct gctl_req_table *gtp;
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struct gctl_req *rp;
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rp = calloc(1, sizeof *rp);
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if (rp == NULL)
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return (NULL);
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for (gtp = gcrt; gtp->request != req; gtp++)
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if (gtp->request == GCTL_INVALID_REQUEST)
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break;
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rp->request = req;
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rp->reqt = gtp;
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if (rp->reqt->request == GCTL_INVALID_REQUEST)
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gctl_set_error(rp, "Invalid request");
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return (rp);
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}
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/*
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* Allocate space for another argument.
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*/
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static struct gctl_req_arg *
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gctl_new_arg(struct gctl_req *req)
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{
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struct gctl_req_arg *ap;
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req->narg++;
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req->arg = realloc(req->arg, sizeof *ap * req->narg);
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gctl_check_alloc(req, req->arg);
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if (req->arg == NULL) {
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req->narg = 0;
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return (NULL);
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}
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ap = req->arg + (req->narg - 1);
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memset(ap, 0, sizeof *ap);
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return (ap);
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}
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void
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gctl_ro_param(struct gctl_req *req, const char *name, int len, const void* value)
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{
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struct gctl_req_arg *ap;
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if (req == NULL || req->error != NULL)
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return;
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ap = gctl_new_arg(req);
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if (ap == NULL)
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return;
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ap->name = strdup(name);
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gctl_check_alloc(req, ap->name);
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ap->nlen = strlen(ap->name) + 1;
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ap->value = __DECONST(void *, value);
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ap->flag = GCTL_PARAM_RD;
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if (len >= 0)
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ap->len = len;
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else if (len < 0) {
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ap->flag |= GCTL_PARAM_ASCII;
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ap->len = strlen(value) + 1;
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}
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}
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void
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gctl_rw_param(struct gctl_req *req, const char *name, int len, void* value)
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{
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struct gctl_req_arg *ap;
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if (req == NULL || req->error != NULL)
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return;
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ap = gctl_new_arg(req);
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if (ap == NULL)
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return;
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ap->name = strdup(name);
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gctl_check_alloc(req, ap->name);
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ap->nlen = strlen(ap->name) + 1;
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ap->value = value;
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ap->flag = GCTL_PARAM_RW;
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if (len >= 0)
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ap->len = len;
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else if (len < 0)
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ap->len = strlen(value) + 1;
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}
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void
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gctl_ro_meta(struct gctl_req *req, off_t offset, u_int len, const void* value)
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{
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struct gctl_req_arg *ap;
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if (req == NULL || req->error != NULL)
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return;
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ap = gctl_new_arg(req);
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if (ap == NULL)
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return;
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ap->value = __DECONST(void *, value);
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ap->flag = GCTL_PARAM_RD;
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ap->offset = offset;
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ap->len = len;
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}
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void
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gctl_rw_meta(struct gctl_req *req, off_t offset, u_int len, void* value)
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{
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struct gctl_req_arg *ap;
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if (req == NULL || req->error != NULL)
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return;
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ap = gctl_new_arg(req);
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if (ap == NULL)
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return;
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ap->value = value;
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ap->flag = GCTL_PARAM_RW;
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ap->offset = offset;
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ap->len = len;
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}
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const char *
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gctl_issue(struct gctl_req *req)
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{
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int fd, error;
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if (req == NULL)
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return ("NULL request pointer");
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if (req->error != NULL)
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return (req->error);
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req->version = GCTL_VERSION;
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req->lerror = BUFSIZ; /* XXX: arbitrary number */
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req->error = malloc(req->lerror);
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if (req->error == NULL) {
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gctl_check_alloc(req, req->error);
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return (req->error);
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}
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memset(req->error, 0, req->lerror);
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req->lerror--;
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fd = open(_PATH_DEV PATH_GEOM_CTL, O_RDONLY);
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if (fd < 0)
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return(strerror(errno));
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error = ioctl(fd, GEOM_CTL, req);
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close(fd);
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if (req->error[0] != '\0')
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return (req->error);
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if (error != 0)
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return(strerror(errno));
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return (NULL);
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}
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void
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gctl_free(struct gctl_req *req)
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{
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u_int i;
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if (req == NULL)
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return;
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for (i = 0; i < req->narg; i++) {
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if (req->arg[i].name != NULL)
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free(req->arg[i].name);
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}
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free(req->arg);
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if (req->error != NULL)
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free(req->error);
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free(req);
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}
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