OpenSolaris Launch

1 files changed, 330 insertions, 0 deletions

diff --git a/usr/src/lib/libdiskmgt/common/path.c b/usr/src/lib/libdiskmgt/common/path.c
new file mode 100644
index 0000000000..b5080dc93b
--- /dev/null
+++ b/usr/src/lib/libdiskmgt/common/path.c
@@ -0,0 +1,330 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License, Version 1.0 only
+ * (the "License").  You may not use this file except in compliance
+ * with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+#include <fcntl.h>
+#include <libdevinfo.h>
+#include <stdlib.h>
+#include <sys/sunddi.h>
+#include <sys/types.h>
+
+#include "libdiskmgt.h"
+#include "disks_private.h"
+
+static int		add_path_state(descriptor_t *dp, nvlist_t *attrs);
+static int		add_wwn(descriptor_t *dp, nvlist_t *attrs);
+static descriptor_t	**get_assoc_drives(descriptor_t *desc, int *errp);
+static descriptor_t	**get_assoc_controllers(descriptor_t *desc, int *errp);
+static char		*path_state_name(di_path_state_t st);
+
+descriptor_t **
+path_get_assoc_descriptors(descriptor_t *desc, dm_desc_type_t type, int *errp)
+{
+	switch (type) {
+	case DM_DRIVE:
+	    return (get_assoc_drives(desc, errp));
+	case DM_CONTROLLER:
+	    return (get_assoc_controllers(desc, errp));
+	}
+
+	*errp = EINVAL;
+	return (NULL);
+}
+
+nvlist_t *
+path_get_attributes(descriptor_t *dp, int *errp)
+{
+	path_t		*pp;
+	nvlist_t	*attrs = NULL;
+
+	pp = dp->p.path;
+
+	if (nvlist_alloc(&attrs, NVATTRS, 0) != 0) {
+	    *errp = ENOMEM;
+	    return (NULL);
+	}
+
+	if (nvlist_add_string(attrs, DM_CTYPE, pp->ctype) != 0) {
+	    nvlist_free(attrs);
+	    *errp = ENOMEM;
+	    return (NULL);
+	}
+
+	/*
+	 * We add the path state and wwn attributes only for descriptors that
+	 * we got via their association to a specific drive (since these
+	 * attributes are drive specific).
+	 */
+	if (dp->name != NULL) {
+	    if (add_path_state(dp, attrs) != 0) {
+		nvlist_free(attrs);
+		*errp = ENOMEM;
+		return (NULL);
+	    }
+	    if (add_wwn(dp, attrs) != 0) {
+		nvlist_free(attrs);
+		*errp = ENOMEM;
+		return (NULL);
+	    }
+	}
+
+	*errp = 0;
+	return (attrs);
+}
+
+descriptor_t *
+path_get_descriptor_by_name(char *name, int *errp)
+{
+	descriptor_t	**paths;
+	int		i;
+	descriptor_t	*path = NULL;
+
+	paths = cache_get_descriptors(DM_PATH, errp);
+	if (*errp != 0) {
+	    return (NULL);
+	}
+
+	for (i = 0; paths[i]; i++) {
+	    if (libdiskmgt_str_eq(name, paths[i]->p.path->name)) {
+		path = paths[i];
+	    } else {
+		/* clean up the unused descriptors */
+		cache_free_descriptor(paths[i]);
+	    }
+	}
+	free(paths);
+
+	if (path == NULL) {
+	    *errp = ENODEV;
+	}
+
+	return (NULL);
+}
+
+/* ARGSUSED */
+descriptor_t **
+path_get_descriptors(int filter[], int *errp)
+{
+	return (cache_get_descriptors(DM_PATH, errp));
+}
+
+char *
+path_get_name(descriptor_t *desc)
+{
+	return (desc->p.path->name);
+}
+
+/* ARGSUSED */
+nvlist_t *
+path_get_stats(descriptor_t *dp, int stat_type, int *errp)
+{
+	/* There are no stat types defined for paths */
+	*errp = EINVAL;
+	return (NULL);
+}
+
+int
+path_make_descriptors()
+{
+	int		error;
+	controller_t	*cp;
+
+	cp = cache_get_controllerlist();
+	while (cp != NULL) {
+	    if (cp->paths != NULL) {
+		int i;
+
+		for (i = 0; cp->paths[i]; i++) {
+		    cache_load_desc(DM_PATH, cp->paths[i], NULL, NULL, &error);
+		    if (error != 0) {
+			return (error);
+		    }
+		}
+	    }
+	    cp = cp->next;
+	}
+
+	return (0);
+}
+
+/*
+ * This is called when we have a name in the descriptor name field.  That
+ * only will be the case when the descriptor was created by getting the
+ * association from a drive to the path.  Since we filled in the name with
+ * the drive device id in that case, we can use the device id to look up the
+ * drive-path state.
+ */
+static int
+add_path_state(descriptor_t *dp, nvlist_t *attrs)
+{
+	ddi_devid_t	devid;
+	path_t		*pp;
+	int		i;
+	int		status = 0;
+
+	if (devid_str_decode(dp->name, &devid, NULL) != 0) {
+	    return (0);
+	}
+
+	/* find the index of the correct drive assoc. */
+	pp = dp->p.path;
+	for (i = 0; pp->disks[i] && pp->states[i] != -1; i++) {
+	    if (pp->disks[i]->devid != NULL &&
+		devid_compare(pp->disks[i]->devid, devid) == 0) {
+
+		/* add the corresponding state */
+		if (nvlist_add_string(attrs, DM_PATH_STATE,
+		    path_state_name(pp->states[i])) != 0) {
+		    status = ENOMEM;
+		}
+		break;
+	    }
+	}
+	devid_free(devid);
+
+	return (status);
+}
+
+/*
+ * This is called when we have a name in the descriptor name field.  That
+ * only will be the case when the descriptor was created by getting the
+ * association from a drive to the path.  Since we filled in the name with
+ * the drive device id in that case, we can use the device id to look up the
+ * drive wwn.
+ */
+static int
+add_wwn(descriptor_t *dp, nvlist_t *attrs)
+{
+	ddi_devid_t	devid;
+	path_t		*pp;
+	int		i;
+	int		status = 0;
+
+	if (devid_str_decode(dp->name, &devid, NULL) != 0) {
+	    return (0);
+	}
+
+	/* find the index of the correct drive assoc. */
+	pp = dp->p.path;
+	for (i = 0; pp->disks[i] && pp->states[i] != -1; i++) {
+	    if (pp->disks[i]->devid != NULL &&
+		devid_compare(pp->disks[i]->devid, devid) == 0) {
+
+		/* add the corresponding state */
+		if (nvlist_add_string(attrs, DM_WWN, pp->wwns[i]) != 0) {
+		    status = ENOMEM;
+		}
+		break;
+	    }
+	}
+	devid_free(devid);
+
+	return (status);
+}
+
+static descriptor_t **
+get_assoc_controllers(descriptor_t *desc, int *errp)
+{
+	path_t		*pp;
+	descriptor_t	**controllers;
+	int		i;
+
+	pp = desc->p.path;
+
+	/* a path can have just one controller */
+
+	controllers = (descriptor_t **)calloc(2, sizeof (descriptor_t *));
+	if (controllers == NULL) {
+	    *errp = ENOMEM;
+	    return (NULL);
+	}
+
+	i = 0;
+	if (pp->controller != NULL) {
+	    controllers[i++] = cache_get_desc(DM_CONTROLLER,
+		pp->controller, NULL, NULL, errp);
+	    if (*errp != 0) {
+		cache_free_descriptors(controllers);
+		return (NULL);
+	    }
+	}
+
+	controllers[i] = NULL;
+
+	*errp = 0;
+	return (controllers);
+}
+
+static descriptor_t **
+get_assoc_drives(descriptor_t *desc, int *errp)
+{
+	path_t		*pp;
+	descriptor_t	**drives;
+	int		cnt;
+	int		i;
+
+	pp = desc->p.path;
+
+	/* Count how many we have. */
+	for (cnt = 0; pp->disks[cnt]; cnt++);
+
+	/* make the snapshot */
+	drives = (descriptor_t **)calloc(cnt + 1, sizeof (descriptor_t *));
+	if (drives == NULL) {
+	    *errp = ENOMEM;
+	    return (NULL);
+	}
+
+	for (i = 0; pp->disks[i]; i++) {
+	    drives[i] = cache_get_desc(DM_DRIVE, pp->disks[i], NULL, NULL,
+		errp);
+	    if (*errp != 0) {
+		cache_free_descriptors(drives);
+		return (NULL);
+	    }
+	}
+	drives[i] = NULL;
+
+	*errp = 0;
+	return (drives);
+}
+
+static char *
+path_state_name(di_path_state_t st)
+{
+	switch (st) {
+	    case DI_PATH_STATE_ONLINE:
+		return ("online");
+	    case DI_PATH_STATE_STANDBY:
+		return ("standby");
+	    case DI_PATH_STATE_OFFLINE:
+		return ("offline");
+	    case DI_PATH_STATE_FAULT:
+		return ("faulted");
+	}
+	return ("unknown");
+}