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-rw-r--r--sys/dev/dm/dm_ioctl.c952
1 files changed, 952 insertions, 0 deletions
diff --git a/sys/dev/dm/dm_ioctl.c b/sys/dev/dm/dm_ioctl.c
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index 00000000000..e6c28f423df
--- /dev/null
+++ b/sys/dev/dm/dm_ioctl.c
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+/* $NetBSD: dm_ioctl.c,v 1.2 2008/12/19 15:24:03 haad Exp $ */
+
+/*
+ * Copyright (c) 2008 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Adam Hamsik.
+ *
+ * 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
+ */
+
+/*
+ * Locking is used to synchronise between ioctl calls and between dm_table's
+ * users.
+ *
+ * ioctl locking:
+ * Simple reference counting, to count users of device will be used routines
+ * dm_dev_busy/dm_dev_unbusy are used for that.
+ * dm_dev_lookup/dm_dev_rem call dm_dev_busy before return(caller is therefore
+ * holder of reference_counter last).
+ *
+ * ioctl routines which change/remove dm_dev parameters must wait on
+ * dm_dev::dev_cv and when last user will call dm_dev_unbusy they will wake
+ * up them.
+ *
+ * table_head locking:
+ * To access table entries dm_table_* routines must be used.
+ *
+ * dm_table_get_entry will increment table users reference
+ * counter. It will return active or inactive table depedns
+ * on uint8_t argument.
+ *
+ * dm_table_release must be called for every table_entry from
+ * dm_table_get_entry. Between these to calls tables can'tbe switched
+ * or destroyed.
+ *
+ * dm_table_head_init initialize talbe_entries SLISTS and io_cv.
+ *
+ * dm_table_head_destroy destroy cv.
+ *
+ * There are two types of users for dm_table_head first type will
+ * only read list and try to do anything with it e.g. dmstrategy,
+ * dm_table_size etc. There is another user for table_head which wants
+ * to change table lists e.g. dm_dev_resume_ioctl, dm_dev_remove_ioctl,
+ * dm_table_clear_ioctl.
+ *
+ * NOTE: It is not allowed to call dm_table_destroy, dm_table_switch_tables
+ * with hold table reference counter. Table reference counter is hold
+ * after calling dm_table_get_entry routine. After calling this
+ * function user must call dm_table_release before any writer table
+ * operation.
+ *
+ * Example: dm_table_get_entry
+ * dm_table_destroy/dm_table_switch_tables
+ * This exaple will lead to deadlock situation because after dm_table_get_entry
+ * table reference counter is != 0 and dm_table_destroy have to wait on cv until
+ * reference counter is 0.
+ *
+ */
+
+#include <sys/types.h>
+#include <sys/param.h>
+
+#include <sys/disklabel.h>
+#include <sys/kmem.h>
+#include <sys/malloc.h>
+#include <sys/vnode.h>
+
+#include <machine/int_fmtio.h>
+
+#include "netbsd-dm.h"
+#include "dm.h"
+
+static uint32_t sc_minor_num;
+
+#define DM_REMOVE_FLAG(flag, name) do { \
+ prop_dictionary_get_uint32(dm_dict,DM_IOCTL_FLAGS,&flag); \
+ flag &= ~name; \
+ prop_dictionary_set_uint32(dm_dict,DM_IOCTL_FLAGS,flag); \
+ } while (/*CONSTCOND*/0)
+
+#define DM_ADD_FLAG(flag, name) do { \
+ prop_dictionary_get_uint32(dm_dict,DM_IOCTL_FLAGS,&flag); \
+ flag |= name; \
+ prop_dictionary_set_uint32(dm_dict,DM_IOCTL_FLAGS,flag); \
+ } while (/*CONSTCOND*/0)
+
+static int dm_dbg_print_flags(int);
+
+/*
+ * Print flags sent to the kernel from libevmapper.
+ */
+static int
+dm_dbg_print_flags(int flags)
+{
+ aprint_debug("dbg_print --- %d\n",flags);
+
+ if (flags & DM_READONLY_FLAG)
+ aprint_debug("dbg_flags: DM_READONLY_FLAG set In/Out\n");
+
+ if (flags & DM_SUSPEND_FLAG)
+ aprint_debug("dbg_flags: DM_SUSPEND_FLAG set In/Out \n");
+
+ if (flags & DM_PERSISTENT_DEV_FLAG)
+ aprint_debug("db_flags: DM_PERSISTENT_DEV_FLAG set In\n");
+
+ if (flags & DM_STATUS_TABLE_FLAG)
+ aprint_debug("dbg_flags: DM_STATUS_TABLE_FLAG set In\n");
+
+ if (flags & DM_ACTIVE_PRESENT_FLAG)
+ aprint_debug("dbg_flags: DM_ACTIVE_PRESENT_FLAG set Out\n");
+
+ if (flags & DM_INACTIVE_PRESENT_FLAG)
+ aprint_debug("dbg_flags: DM_INACTIVE_PRESENT_FLAG set Out\n");
+
+ if (flags & DM_BUFFER_FULL_FLAG)
+ aprint_debug("dbg_flags: DM_BUFFER_FULL_FLAG set Out\n");
+
+ if (flags & DM_SKIP_BDGET_FLAG)
+ aprint_debug("dbg_flags: DM_SKIP_BDGET_FLAG set In\n");
+
+ if (flags & DM_SKIP_LOCKFS_FLAG)
+ aprint_debug("dbg_flags: DM_SKIP_LOCKFS_FLAG set In\n");
+
+ if (flags & DM_NOFLUSH_FLAG)
+ aprint_debug("dbg_flags: DM_NOFLUSH_FLAG set In\n");
+
+ return 0;
+}
+
+/*
+ * Get version ioctl call I do it as default therefore this
+ * function is unused now.
+ */
+int
+dm_get_version_ioctl(prop_dictionary_t dm_dict)
+{
+ return 0;
+}
+
+/*
+ * Get list of all available targets from global
+ * target list and sent them back to libdevmapper.
+ */
+int
+dm_list_versions_ioctl(prop_dictionary_t dm_dict)
+{
+ prop_array_t target_list;
+ uint32_t flags;
+
+ flags = 0;
+
+ prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags);
+
+ dm_dbg_print_flags(flags);
+
+ target_list = dm_target_prop_list();
+
+ prop_dictionary_set(dm_dict, DM_IOCTL_CMD_DATA, target_list);
+
+ prop_object_release(target_list);
+
+ return 0;
+}
+
+/*
+ * Create in-kernel entry for device. Device attributes such as name, uuid are
+ * taken from proplib dictionary.
+ *
+ */
+int
+dm_dev_create_ioctl(prop_dictionary_t dm_dict)
+{
+ dm_dev_t *dmv;
+ const char *name, *uuid;
+ int r, flags;
+
+ r = 0;
+ flags = 0;
+ name = NULL;
+ uuid = NULL;
+
+ /* Get needed values from dictionary. */
+ prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_NAME, &name);
+ prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_UUID, &uuid);
+ prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags);
+
+ dm_dbg_print_flags(flags);
+
+ /* Lookup name and uuid if device already exist quit. */
+ if ((dmv = dm_dev_lookup(name, uuid, -1)) != NULL) {
+ DM_ADD_FLAG(flags, DM_EXISTS_FLAG); /* Device already exists */
+ dm_dev_unbusy(dmv);
+ return EEXIST;
+ }
+
+ if ((dmv = dm_dev_alloc()) == NULL)
+ return ENOMEM;
+
+ if (uuid)
+ strncpy(dmv->uuid, uuid, DM_UUID_LEN);
+ else
+ dmv->uuid[0] = '\0';
+
+ if (name)
+ strlcpy(dmv->name, name, DM_NAME_LEN);
+
+ dmv->minor = atomic_inc_32_nv(&sc_minor_num);
+
+ dmv->flags = 0; /* device flags are set when needed */
+ dmv->ref_cnt = 0;
+ dmv->event_nr = 0;
+ dmv->dev_type = 0;
+
+ mutex_init(&dmv->dev_mtx, MUTEX_DEFAULT, IPL_NONE);
+ cv_init(&dmv->dev_cv, "dm_dev");
+
+ dm_table_head_init(&dmv->table_head);
+
+ if (flags & DM_READONLY_FLAG)
+ dmv->flags |= DM_READONLY_FLAG;
+
+ prop_dictionary_set_uint32(dm_dict, DM_IOCTL_MINOR, dmv->minor);
+
+ if ((r = dm_dev_insert(dmv)) != 0){
+ dm_dev_free(dmv);
+ }
+
+ DM_ADD_FLAG(flags, DM_EXISTS_FLAG);
+ DM_REMOVE_FLAG(flags, DM_INACTIVE_PRESENT_FLAG);
+
+ return r;
+}
+
+/*
+ * Get list of created device-mapper devices fromglobal list and
+ * send it to kernel.
+ *
+ * Output dictionary:
+ *
+ * <key>cmd_data</key>
+ * <array>
+ * <dict>
+ * <key>name<key>
+ * <string>...</string>
+ *
+ * <key>dev</key>
+ * <integer>...</integer>
+ * </dict>
+ * </array>
+ *
+ */
+int
+dm_dev_list_ioctl(prop_dictionary_t dm_dict)
+{
+ prop_array_t dev_list;
+
+ uint32_t flags;
+
+ flags = 0;
+
+ prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags);
+
+ dm_dbg_print_flags(flags);
+
+ dev_list = dm_dev_prop_list();
+
+ prop_dictionary_set(dm_dict, DM_IOCTL_CMD_DATA, dev_list);
+ prop_object_release(dev_list);
+
+ return 0;
+}
+
+/*
+ * Rename selected devices old name is in struct dm_ioctl.
+ * newname is taken from dictionary
+ *
+ * <key>cmd_data</key>
+ * <array>
+ * <string>...</string>
+ * </array>
+ */
+int
+dm_dev_rename_ioctl(prop_dictionary_t dm_dict)
+{
+ prop_array_t cmd_array;
+ dm_dev_t *dmv;
+
+ const char *name, *uuid, *n_name;
+ uint32_t flags, minor;
+
+ name = NULL;
+ uuid = NULL;
+ minor = 0;
+
+ /* Get needed values from dictionary. */
+ prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_NAME, &name);
+ prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_UUID, &uuid);
+ prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags);
+ prop_dictionary_get_uint32(dm_dict, DM_IOCTL_MINOR, &minor);
+
+ dm_dbg_print_flags(flags);
+
+ cmd_array = prop_dictionary_get(dm_dict, DM_IOCTL_CMD_DATA);
+
+ prop_array_get_cstring_nocopy(cmd_array, 0, &n_name);
+
+ if (strlen(n_name) + 1 > DM_NAME_LEN)
+ return EINVAL;
+
+ if ((dmv = dm_dev_rem(name, uuid, minor)) == NULL) {
+ DM_REMOVE_FLAG(flags, DM_EXISTS_FLAG);
+ return ENOENT;
+ }
+
+ /* change device name */
+ /* XXX How to deal with this change, name only used in
+ * dm_dev_routines, should I add dm_dev_change_name which will run under the
+ * dm_dev_list mutex ?
+ */
+ strlcpy(dmv->name, n_name, DM_NAME_LEN);
+
+ prop_dictionary_set_uint32(dm_dict, DM_IOCTL_OPEN, dmv->table_head.io_cnt);
+ prop_dictionary_set_uint32(dm_dict, DM_IOCTL_MINOR, dmv->minor);
+ prop_dictionary_set_cstring(dm_dict, DM_IOCTL_UUID, dmv->uuid);
+
+ dm_dev_insert(dmv);
+
+ return 0;
+}
+
+/*
+ * Remove device from global list I have to remove active
+ * and inactive tables first.
+ */
+int
+dm_dev_remove_ioctl(prop_dictionary_t dm_dict)
+{
+ dm_dev_t *dmv;
+ const char *name, *uuid;
+ uint32_t flags, minor;
+
+ flags = 0;
+ name = NULL;
+ uuid = NULL;
+
+ /* Get needed values from dictionary. */
+ prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_NAME, &name);
+ prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_UUID, &uuid);
+ prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags);
+ prop_dictionary_get_uint32(dm_dict, DM_IOCTL_MINOR, &minor);
+
+ dm_dbg_print_flags(flags);
+
+ /* Remove device from global device list */
+ if ((dmv = dm_dev_rem(name, uuid, minor)) == NULL){
+ DM_REMOVE_FLAG(flags, DM_EXISTS_FLAG);
+ return ENOENT;
+ }
+
+ /* Destroy active table first. */
+ dm_table_destroy(&dmv->table_head, DM_TABLE_ACTIVE);
+
+ /* Destroy inactive table if exits, too. */
+ dm_table_destroy(&dmv->table_head, DM_TABLE_INACTIVE);
+
+ dm_table_head_destroy(&dmv->table_head);
+
+ mutex_destroy(&dmv->dev_mtx);
+ cv_destroy(&dmv->dev_cv);
+
+ /* Destroy device */
+ (void)dm_dev_free(dmv);
+
+ return 0;
+}
+
+/*
+ * Return actual state of device to libdevmapper.
+ */
+int
+dm_dev_status_ioctl(prop_dictionary_t dm_dict)
+{
+ dm_dev_t *dmv;
+ const char *name, *uuid;
+ uint32_t flags, j, minor;
+
+ name = NULL;
+ uuid = NULL;
+ flags = 0;
+ j = 0;
+
+ prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_NAME, &name);
+ prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_UUID, &uuid);
+ prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags);
+ prop_dictionary_get_uint32(dm_dict, DM_IOCTL_MINOR, &minor);
+
+ if ((dmv = dm_dev_lookup(name, uuid, minor)) == NULL) {
+ DM_REMOVE_FLAG(flags, DM_EXISTS_FLAG);
+ return ENOENT;
+ }
+
+ dm_dbg_print_flags(dmv->flags);
+
+ prop_dictionary_set_uint32(dm_dict, DM_IOCTL_OPEN, dmv->table_head.io_cnt);
+ prop_dictionary_set_uint32(dm_dict, DM_IOCTL_MINOR, dmv->minor);
+ prop_dictionary_set_cstring(dm_dict, DM_IOCTL_UUID, dmv->uuid);
+
+ if (dmv->flags & DM_SUSPEND_FLAG)
+ DM_ADD_FLAG(flags, DM_SUSPEND_FLAG);
+
+ /* Add status flags for tables I have to check both
+ active and inactive tables. */
+ if ((j = dm_table_get_target_count(&dmv->table_head, DM_TABLE_ACTIVE))) {
+ DM_ADD_FLAG(flags, DM_ACTIVE_PRESENT_FLAG);
+ } else
+ DM_REMOVE_FLAG(flags, DM_ACTIVE_PRESENT_FLAG);
+
+ prop_dictionary_set_uint32(dm_dict, DM_IOCTL_TARGET_COUNT, j);
+
+ if (dm_table_get_target_count(&dmv->table_head, DM_TABLE_INACTIVE))
+ DM_ADD_FLAG(flags, DM_INACTIVE_PRESENT_FLAG);
+ else
+ DM_REMOVE_FLAG(flags, DM_INACTIVE_PRESENT_FLAG);
+
+ dm_dev_unbusy(dmv);
+
+ return 0;
+}
+
+/*
+ * Set only flag to suggest that device is suspended. This call is
+ * not supported in NetBSD.
+ *
+ */
+int
+dm_dev_suspend_ioctl(prop_dictionary_t dm_dict)
+{
+ dm_dev_t *dmv;
+ const char *name, *uuid;
+ uint32_t flags, minor;
+
+ name = NULL;
+ uuid = NULL;
+ flags = 0;
+
+ prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_NAME, &name);
+ prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_UUID, &uuid);
+ prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags);
+ prop_dictionary_get_uint32(dm_dict, DM_IOCTL_MINOR, &minor);
+
+ if ((dmv = dm_dev_lookup(name, uuid, minor)) == NULL){
+ DM_REMOVE_FLAG(flags, DM_EXISTS_FLAG);
+ return ENOENT;
+ }
+
+ atomic_or_32(&dmv->flags, DM_SUSPEND_FLAG);
+
+ dm_dbg_print_flags(dmv->flags);
+
+ prop_dictionary_set_uint32(dm_dict, DM_IOCTL_OPEN, dmv->table_head.io_cnt);
+ prop_dictionary_set_uint32(dm_dict, DM_IOCTL_FLAGS, dmv->flags);
+ prop_dictionary_set_uint32(dm_dict, DM_IOCTL_MINOR, dmv->minor);
+
+ dm_dev_unbusy(dmv);
+
+ /* Add flags to dictionary flag after dmv -> dict copy */
+ DM_ADD_FLAG(flags, DM_EXISTS_FLAG);
+
+ return 0;
+}
+
+/*
+ * Simulate Linux behaviour better and switch tables here and not in
+ * dm_table_load_ioctl.
+ */
+int
+dm_dev_resume_ioctl(prop_dictionary_t dm_dict)
+{
+ dm_dev_t *dmv;
+ const char *name, *uuid;
+ uint32_t flags, minor;
+
+ name = NULL;
+ uuid = NULL;
+ flags = 0;
+
+/* char *xml;
+ xml = prop_dictionary_externalize(dm_dict);
+ printf("%s\n",xml);*/
+
+ prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_NAME, &name);
+ prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_UUID, &uuid);
+ prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags);
+ prop_dictionary_get_uint32(dm_dict, DM_IOCTL_MINOR, &minor);
+
+ /* Remove device from global device list */
+ if ((dmv = dm_dev_lookup(name, uuid, minor)) == NULL){
+ DM_REMOVE_FLAG(flags, DM_EXISTS_FLAG);
+ return ENOENT;
+ }
+
+ atomic_and_32(&dmv->flags, ~(DM_SUSPEND_FLAG | DM_INACTIVE_PRESENT_FLAG));
+ atomic_or_32(&dmv->flags, DM_ACTIVE_PRESENT_FLAG);
+
+ dm_table_switch_tables(&dmv->table_head);
+
+ DM_ADD_FLAG(flags, DM_EXISTS_FLAG);
+
+ dmgetdisklabel(dmv->dk_label, &dmv->table_head);
+
+ prop_dictionary_set_uint32(dm_dict, DM_IOCTL_OPEN, dmv->table_head.io_cnt);
+ prop_dictionary_set_uint32(dm_dict, DM_IOCTL_FLAGS, dmv->flags);
+ prop_dictionary_set_uint32(dm_dict, DM_IOCTL_MINOR, dmv->minor);
+
+ dm_dev_unbusy(dmv);
+
+ /* Destroy inactive table after resume. */
+ dm_table_destroy(&dmv->table_head, DM_TABLE_INACTIVE);
+
+ return 0;
+}
+
+/*
+ * Table management routines
+ * lvm2tools doens't send name/uuid to kernel with table
+ * for lookup I have to use minor number.
+ */
+
+/*
+ * Remove inactive table from device. Routines which work's with inactive tables
+ * doesn't need to synchronise with dmstrategy. They can synchronise themselves with mutex?.
+ *
+ */
+int
+dm_table_clear_ioctl(prop_dictionary_t dm_dict)
+{
+ dm_dev_t *dmv;
+ const char *name, *uuid;
+ uint32_t flags, minor;
+
+ dmv = NULL;
+ name = NULL;
+ uuid = NULL;
+ flags = 0;
+ minor = 0;
+
+ prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_NAME, &name);
+ prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_UUID, &uuid);
+ prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags);
+ prop_dictionary_get_uint32(dm_dict, DM_IOCTL_MINOR, &minor);
+
+ aprint_debug("Clearing inactive table from device: %s--%s\n",
+ name, uuid);
+
+ if ((dmv = dm_dev_lookup(name, uuid, minor)) == NULL){
+ DM_REMOVE_FLAG(flags, DM_EXISTS_FLAG);
+ return ENOENT;
+ }
+
+ /* Select unused table */
+ dm_table_destroy(&dmv->table_head, DM_TABLE_INACTIVE);
+
+ atomic_and_32(&dmv->flags, ~DM_INACTIVE_PRESENT_FLAG);
+
+ dm_dev_unbusy(dmv);
+
+ return 0;
+}
+
+/*
+ * Get list of physical devices for active table.
+ * Get dev_t from pdev vnode and insert it into cmd_array.
+ *
+ * XXX. This function is called from lvm2tools to get information
+ * about physical devices, too e.g. during vgcreate.
+ */
+int
+dm_table_deps_ioctl(prop_dictionary_t dm_dict)
+{
+ dm_dev_t *dmv;
+ dm_table_t *tbl;
+ dm_table_entry_t *table_en;
+
+ prop_array_t cmd_array;
+ const char *name, *uuid;
+ uint32_t flags, minor;
+
+ size_t i;
+
+ name = NULL;
+ uuid = NULL;
+ dmv = NULL;
+ flags = 0;
+
+ i = 0;
+
+ prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_NAME, &name);
+ prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_UUID, &uuid);
+ prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags);
+ prop_dictionary_get_uint32(dm_dict, DM_IOCTL_MINOR, &minor);
+
+ /* create array for dev_t's */
+ cmd_array = prop_array_create();
+
+ if ((dmv = dm_dev_lookup(name, uuid, minor)) == NULL){
+ DM_REMOVE_FLAG(flags, DM_EXISTS_FLAG);
+ return ENOENT;
+ }
+
+ prop_dictionary_set_uint32(dm_dict, DM_IOCTL_MINOR, dmv->minor);
+ prop_dictionary_set_cstring(dm_dict, DM_IOCTL_NAME, dmv->name);
+ prop_dictionary_set_cstring(dm_dict, DM_IOCTL_UUID, dmv->uuid);
+
+ aprint_debug("Getting table deps for device: %s\n", dmv->name);
+
+ tbl = dm_table_get_entry(&dmv->table_head, DM_TABLE_ACTIVE);
+
+ SLIST_FOREACH(table_en, tbl, next)
+ table_en->target->deps(table_en, cmd_array);
+
+ dm_table_release(&dmv->table_head, DM_TABLE_ACTIVE);
+ dm_dev_unbusy(dmv);
+
+ prop_dictionary_set(dm_dict, DM_IOCTL_CMD_DATA, cmd_array);
+ prop_object_release(cmd_array);
+
+ return 0;
+}
+
+/*
+ * Load new table/tables to device.
+ * Call apropriate target init routine open all physical pdev's and
+ * link them to device. For other targets mirror, strip, snapshot
+ * etc. also add dependency devices to upcalls list.
+ *
+ * Load table to inactive slot table are switched in dm_device_resume_ioctl.
+ * This simulates Linux behaviour better there should not be any difference.
+ *
+ */
+int
+dm_table_load_ioctl(prop_dictionary_t dm_dict)
+{
+ dm_dev_t *dmv;
+ dm_table_entry_t *table_en, *last_table;
+ dm_table_t *tbl;
+ dm_target_t *target;
+
+ prop_object_iterator_t iter;
+ prop_array_t cmd_array;
+ prop_dictionary_t target_dict;
+
+ const char *name, *uuid, *type;
+
+ uint32_t flags, ret, minor;
+
+ char *str;
+
+ ret = 0;
+ flags = 0;
+ name = NULL;
+ uuid = NULL;
+ dmv = NULL;
+ last_table = NULL;
+ str = NULL;
+
+/* char *xml;
+ xml = prop_dictionary_externalize(dm_dict);
+ printf("%s\n",xml);*/
+
+ prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_NAME, &name);
+ prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_UUID, &uuid);
+ prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags);
+ prop_dictionary_get_uint32(dm_dict, DM_IOCTL_MINOR, &minor);
+
+ cmd_array = prop_dictionary_get(dm_dict, DM_IOCTL_CMD_DATA);
+ iter = prop_array_iterator(cmd_array);
+ dm_dbg_print_flags(flags);
+
+ if ((dmv = dm_dev_lookup(name, uuid, minor)) == NULL){
+ DM_REMOVE_FLAG(flags, DM_EXISTS_FLAG);
+ return ENOENT;
+ }
+
+ aprint_debug("Loading table to device: %s--%d\n",name,dmv->table_head.cur_active_table);
+
+ /*
+ * I have to check if this table slot is not used by another table list.
+ * if it is used I should free them.
+ */
+ if (dmv->flags & DM_INACTIVE_PRESENT_FLAG)
+ dm_table_destroy(&dmv->table_head, DM_TABLE_INACTIVE);
+
+ dm_dbg_print_flags(dmv->flags);
+ tbl = dm_table_get_entry(&dmv->table_head, DM_TABLE_INACTIVE);
+
+ aprint_debug("dmv->name = %s\n", dmv->name);
+
+ prop_dictionary_set_uint32(dm_dict, DM_IOCTL_MINOR, dmv->minor);
+
+ while((target_dict = prop_object_iterator_next(iter)) != NULL){
+
+ prop_dictionary_get_cstring_nocopy(target_dict,
+ DM_TABLE_TYPE, &type);
+
+ /*
+ * If we want to deny table with 2 or more different
+ * target we should do it here
+ */
+ if ((target = dm_target_lookup_name(type)) == NULL)
+ return ENOENT;
+
+ if ((table_en=kmem_alloc(sizeof(dm_table_entry_t),
+ KM_NOSLEEP)) == NULL)
+ return ENOMEM;
+
+ prop_dictionary_get_uint64(target_dict, DM_TABLE_START,
+ &table_en->start);
+ prop_dictionary_get_uint64(target_dict, DM_TABLE_LENGTH,
+ &table_en->length);
+
+ table_en->target = target;
+ table_en->dm_dev = dmv;
+ table_en->target_config = NULL;
+
+ /*
+ * There is a parameter string after dm_target_spec
+ * structure which points to /dev/wd0a 284 part of
+ * table. String str points to this text. This can be
+ * null and therefore it should be checked before we try to
+ * use it.
+ */
+ prop_dictionary_get_cstring(target_dict,
+ DM_TABLE_PARAMS, (char**)&str);
+
+ if (SLIST_EMPTY(tbl))
+ /* insert this table to head */
+ SLIST_INSERT_HEAD(tbl, table_en, next);
+ else
+ SLIST_INSERT_AFTER(last_table, table_en, next);
+
+ /*
+ * Params string is different for every target,
+ * therfore I have to pass it to target init
+ * routine and parse parameters there.
+ */
+
+ if ((ret = target->init(dmv, &table_en->target_config,
+ str)) != 0) {
+
+ dm_table_destroy(&dmv->table_head, DM_TABLE_INACTIVE);
+ free(str, M_TEMP);
+
+ return ret;
+ }
+
+ last_table = table_en;
+
+ free(str, M_TEMP);
+ }
+ prop_object_iterator_release(iter);
+
+ DM_ADD_FLAG(flags, DM_INACTIVE_PRESENT_FLAG);
+ atomic_or_32(&dmv->flags, DM_INACTIVE_PRESENT_FLAG);
+
+ dm_table_release(&dmv->table_head, DM_TABLE_INACTIVE);
+ dm_dev_unbusy(dmv);
+ return 0;
+}
+
+/*
+ * Get description of all tables loaded to device from kernel
+ * and send it to libdevmapper.
+ *
+ * Output dictionary for every table:
+ *
+ * <key>cmd_data</key>
+ * <array>
+ * <dict>
+ * <key>type<key>
+ * <string>...</string>
+ *
+ * <key>start</key>
+ * <integer>...</integer>
+ *
+ * <key>length</key>
+ * <integer>...</integer>
+ *
+ * <key>params</key>
+ * <string>...</string>
+ * </dict>
+ * </array>
+ *
+ */
+int
+dm_table_status_ioctl(prop_dictionary_t dm_dict)
+{
+ dm_dev_t *dmv;
+ dm_table_t *tbl;
+ dm_table_entry_t *table_en;
+
+ prop_array_t cmd_array;
+ prop_dictionary_t target_dict;
+
+ uint32_t rec_size, minor;
+
+ const char *name, *uuid;
+ char *params;
+ int flags;
+
+ dmv = NULL;
+ uuid = NULL;
+ name = NULL;
+ params = NULL;
+ flags = 0;
+ rec_size = 0;
+
+ prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_NAME, &name);
+ prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_UUID, &uuid);
+ prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags);
+ prop_dictionary_get_uint32(dm_dict, DM_IOCTL_MINOR, &minor);
+
+ cmd_array = prop_array_create();
+
+ if ((dmv = dm_dev_lookup(name, uuid, minor)) == NULL){
+ DM_REMOVE_FLAG(flags, DM_EXISTS_FLAG);
+ return ENOENT;
+ }
+
+ if (dm_table_get_target_count(&dmv->table_head, DM_TABLE_ACTIVE))
+ DM_ADD_FLAG(flags, DM_ACTIVE_PRESENT_FLAG);
+ else {
+ DM_REMOVE_FLAG(flags, DM_ACTIVE_PRESENT_FLAG);
+
+ if (dm_table_get_target_count(&dmv->table_head, DM_TABLE_INACTIVE))
+ DM_ADD_FLAG(flags, DM_INACTIVE_PRESENT_FLAG);
+ else {
+ DM_REMOVE_FLAG(flags, DM_INACTIVE_PRESENT_FLAG);
+ }
+ }
+
+ if (dmv->flags & DM_SUSPEND_FLAG)
+ DM_ADD_FLAG(flags, DM_SUSPEND_FLAG);
+
+ prop_dictionary_set_uint32(dm_dict, DM_IOCTL_MINOR, dmv->minor);
+
+ /* I should use mutex here and not rwlock there can be IO operation
+ during this ioctl on device. */
+
+ aprint_debug("Status of device tables: %s--%d\n",
+ name, dmv->table_head.cur_active_table);
+
+ tbl = dm_table_get_entry(&dmv->table_head, DM_TABLE_ACTIVE);
+
+ SLIST_FOREACH(table_en, tbl, next)
+ {
+ target_dict = prop_dictionary_create();
+ aprint_debug("%016" PRIu64 ", length %016" PRIu64
+ ", target %s\n", table_en->start, table_en->length,
+ table_en->target->name);
+
+ prop_dictionary_set_uint64(target_dict, DM_TABLE_START,
+ table_en->start);
+ prop_dictionary_set_uint64(target_dict, DM_TABLE_LENGTH,
+ table_en->length);
+
+ prop_dictionary_set_cstring(target_dict, DM_TABLE_TYPE,
+ table_en->target->name);
+
+ /* dm_table_get_cur_actv.table ?? */
+ prop_dictionary_set_int32(target_dict, DM_TABLE_STAT,
+ dmv->table_head.cur_active_table);
+
+ if (flags |= DM_STATUS_TABLE_FLAG) {
+ params = table_en->target->status
+ (table_en->target_config);
+
+ if(params != NULL){
+ prop_dictionary_set_cstring(target_dict,
+ DM_TABLE_PARAMS, params);
+
+ kmem_free(params, strlen(params) + 1);
+ }
+ }
+
+ prop_array_add(cmd_array, target_dict);
+ prop_object_release(target_dict);
+ }
+
+ dm_table_release(&dmv->table_head, DM_TABLE_ACTIVE);
+ dm_dev_unbusy(dmv);
+
+ prop_dictionary_set(dm_dict, DM_IOCTL_CMD_DATA, cmd_array);
+ prop_object_release(cmd_array);
+
+ return 0;
+}
+
+
+/*
+ * For every call I have to set kernel driver version.
+ * Because I can have commands supported only in other
+ * newer/later version. This routine is called for every
+ * ioctl command.
+ */
+int
+dm_check_version(prop_dictionary_t dm_dict)
+{
+ size_t i;
+ int dm_version[3];
+ prop_array_t ver;
+
+ ver = prop_dictionary_get(dm_dict, DM_IOCTL_VERSION);
+
+ for(i=0; i < 3; i++)
+ prop_array_get_uint32(ver, i, &dm_version[i]);
+
+ if (DM_VERSION_MAJOR != dm_version[0] || DM_VERSION_MINOR < dm_version[1]){
+ aprint_debug("libdevmapper/kernel version mismatch "
+ "kernel: %d.%d.%d libdevmapper: %d.%d.%d\n",
+ DM_VERSION_MAJOR, DM_VERSION_MINOR, DM_VERSION_PATCHLEVEL,
+ dm_version[0], dm_version[1], dm_version[2]);
+
+ return EIO;
+ }
+
+ prop_array_set_uint32(ver, 0, DM_VERSION_MAJOR);
+ prop_array_set_uint32(ver, 1, DM_VERSION_MINOR);
+ prop_array_set_uint32(ver, 2, DM_VERSION_PATCHLEVEL);
+
+ return 0;
+}