Add marshalling functions for OAM api.

svn path=/head/; revision=112510

lib/libgeom/Makefile

@@ -4,9 +4,10 @@ LIB=	geom
 SRCS+=	geom_getxml.c
 SRCS+=	geom_stats.c
 SRCS+=	geom_xml2tree.c
+SRCS+=	geom_ctl.c
 INCS=	libgeom.h
 
-CFLAGS += -I${.CURDIR}
+CFLAGS += -I${.CURDIR} -g
 
 WARNS?=	3
 

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 <stdio.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <stdint.h>
+#include <sys/types.h>
+#include <stdarg.h>
+#include <string.h>
+#include <stdlib.h>
+#include <paths.h>
+
+#include <sys/queue.h>
+
+#define GEOM_CTL_TABLE 1
+#include <libgeom.h>
+
+#include <geom/geom_ext.h>
+
+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);
+}
+

lib/libgeom/libgeom.h

@@ -34,6 +34,8 @@
 #include <sys/queue.h>
 #include <sys/time.h>
 
+#include <geom/geom_ctl.h>
+
 void geom_stats_close(void);
 void geom_stats_resync(void);
 int geom_stats_open(void);
@@ -125,4 +127,25 @@ int geom_xml2tree(struct gmesh *gmp, char *p);
 int geom_gettree(struct gmesh *gmp);
 void geom_deletetree(struct gmesh *gmp);
 
+/* geom_ctl.c */
+
+struct geom_ctl_req;
+
+#ifdef _STDIO_H_			/* limit #include pollution */
+void geom_ctl_dump(struct geom_ctl_req *req, FILE *f);
+#endif
+void geom_ctl_free(struct geom_ctl_req *req);
+struct geom_ctl_req *geom_ctl_get_handle(enum geom_ctl_request req);
+const char *geom_ctl_issue(struct geom_ctl_req *req);
+void geom_ctl_set_class_by_id(struct geom_ctl_req *req, void *id);
+void geom_ctl_set_class_by_name(struct geom_ctl_req *req, const char *name);
+void geom_ctl_set_consumer_by_id(struct geom_ctl_req *req, void *id);
+void geom_ctl_set_consumer_by_name(struct geom_ctl_req *req, const char *name);
+void geom_ctl_set_geom_by_id(struct geom_ctl_req *req, void *id);
+void geom_ctl_set_geom_by_name(struct geom_ctl_req *req, const char *name);
+void geom_ctl_set_meta(struct geom_ctl_req *req, off_t offset, u_int len, void* val);
+void geom_ctl_set_param(struct geom_ctl_req *req, const char *name, int len, void* val);
+void geom_ctl_set_provider_by_id(struct geom_ctl_req *req, void *id);
+void geom_ctl_set_provider_by_name(struct geom_ctl_req *req, const char *name);
+
 #endif /* _LIBGEOM_H_ */