Use provider's ident to handle situations when disks are moved around

and show up with different names: first try to open provider using
remembered name and compare its ident, if equal, this is our provider,
if not equal or there is no provider with such name, find provider with
remembered ident and don't care about the name.

1 files changed, 119 insertions, 0 deletions

diff --git a/cddl/compat/opensolaris/misc/deviceid.c b/cddl/compat/opensolaris/misc/deviceid.c
new file mode 100644
index 000000000000..f37b1d6d3563
--- /dev/null
+++ b/cddl/compat/opensolaris/misc/deviceid.c
@@ -0,0 +1,119 @@
+/*-
+ * Copyright (c) 2007 Pawel Jakub Dawidek <pjd@FreeBSD.org>
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHORS 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 AUTHORS 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.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/ioctl.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <libgeom.h>
+#include <devid.h>
+
+int
+devid_str_decode(char *devidstr, ddi_devid_t *retdevid, char **retminor_name)
+{
+
+	if (strlcpy(retdevid->devid, devidstr, sizeof(retdevid->devid)) >=
+	    sizeof(retdevid->devid)) {
+		return (EINVAL);
+	}
+	*retminor_name = strdup("");
+	if (*retminor_name == NULL);
+		return (ENOMEM);
+	return (0);
+}
+
+int
+devid_deviceid_to_nmlist(char *search_path, ddi_devid_t devid, char *minor_name,
+    devid_nmlist_t **retlist)
+{
+	char path[MAXPATHLEN];
+	char *dst;
+
+	if (g_get_name(devid.devid, path, sizeof(path)) == -1)
+		return (errno);
+	*retlist = malloc(sizeof(**retlist));
+	if (*retlist == NULL)
+		return (ENOMEM);
+	if (strlcpy((*retlist)[0].devname, path,
+	    sizeof((*retlist)[0].devname)) >= sizeof((*retlist)[0].devname)) {
+		free(*retlist);
+		return (ENAMETOOLONG);
+	}
+	return (0);
+}
+
+void
+devid_str_free(char *str)
+{
+
+	free(str);
+}
+
+void
+devid_free(ddi_devid_t devid)
+{
+	/* Do nothing. */
+}
+
+void
+devid_free_nmlist(devid_nmlist_t *list)
+{
+
+	free(list);
+}
+
+int
+devid_get(int fd, ddi_devid_t *retdevid)
+{
+
+	if (ioctl(fd, DIOCGIDENT, retdevid->devid) == -1)
+		return (errno);
+	if (retdevid->devid[0] == '\0')
+		return (ENOENT);
+	return (0);
+}
+
+int
+devid_get_minor_name(int fd, char **retminor_name)
+{
+
+	*retminor_name = strdup("");
+	if (*retminor_name == NULL)
+		return (ENOMEM);
+	return (0);
+}
+
+char *
+devid_str_encode(ddi_devid_t devid, char *minor_name)
+{
+
+	return (strdup(devid.devid));
+}