mirror of
git://sourceware.org/git/lvm2.git
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1809 lines
42 KiB
C
1809 lines
42 KiB
C
/*
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* Copyright (C) 2005 Red Hat, Inc. All rights reserved.
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*
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* This file is part of the device-mapper userspace tools.
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*
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* This copyrighted material is made available to anyone wishing to use,
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* modify, copy, or redistribute it subject to the terms and conditions
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* of the GNU Lesser General Public License v.2.1.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "lib.h"
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#include "libdm-targets.h"
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#include "libdm-common.h"
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#include "list.h"
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#include "kdev_t.h"
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#include <stdarg.h>
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#include <sys/param.h>
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#include <linux/dm-ioctl.h>
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#define MAX_TARGET_PARAMSIZE 500000
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/* FIXME Fix interface so this is used only by LVM */
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#define UUID_PREFIX "LVM-"
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/* Supported segment types */
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enum {
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SEG_ERROR,
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SEG_LINEAR,
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SEG_MIRRORED,
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SEG_SNAPSHOT,
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SEG_SNAPSHOT_ORIGIN,
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SEG_STRIPED,
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SEG_ZERO,
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};
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/* FIXME Add crypt and multipath support */
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struct {
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unsigned type;
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const char *target;
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} dm_segtypes[] = {
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{ SEG_ERROR, "error" },
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{ SEG_LINEAR, "linear" },
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{ SEG_MIRRORED, "mirror" },
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{ SEG_SNAPSHOT, "snapshot" },
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{ SEG_SNAPSHOT_ORIGIN, "snapshot-origin" },
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{ SEG_STRIPED, "striped" },
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{ SEG_ZERO, "zero"},
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};
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/* Some segment types have a list of areas of other devices attached */
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struct seg_area {
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struct list list;
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struct dm_tree_node *dev_node;
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uint64_t offset;
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};
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/* Per-segment properties */
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struct load_segment {
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struct list list;
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unsigned type;
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uint64_t size;
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unsigned area_count; /* Linear + Striped + Mirrored */
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struct list areas; /* Linear + Striped + Mirrored */
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uint32_t stripe_size; /* Striped */
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int persistent; /* Snapshot */
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uint32_t chunk_size; /* Snapshot */
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struct dm_tree_node *cow; /* Snapshot */
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struct dm_tree_node *origin; /* Snapshot + Snapshot origin */
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struct dm_tree_node *log; /* Mirror */
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uint32_t region_size; /* Mirror */
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unsigned clustered; /* Mirror */
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unsigned mirror_area_count; /* Mirror */
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uint32_t flags; /* Mirror log */
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char *uuid; /* Clustered mirror log */
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};
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/* Per-device properties */
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struct load_properties {
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int read_only;
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uint32_t major;
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uint32_t minor;
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unsigned segment_count;
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struct list segs;
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const char *new_name;
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};
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/* Two of these used to join two nodes with uses and used_by. */
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struct dm_tree_link {
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struct list list;
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struct dm_tree_node *node;
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};
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struct dm_tree_node {
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struct dm_tree *dtree;
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const char *name;
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const char *uuid;
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struct dm_info info;
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struct list uses; /* Nodes this node uses */
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struct list used_by; /* Nodes that use this node */
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int activation_priority; /* 0 gets activated first */
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void *context; /* External supplied context */
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struct load_properties props; /* For creation/table (re)load */
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};
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struct dm_tree {
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struct dm_pool *mem;
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struct dm_hash_table *devs;
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struct dm_hash_table *uuids;
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struct dm_tree_node root;
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int skip_lockfs; /* 1 skips lockfs (for non-snapshots) */
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};
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/* FIXME Consider exporting this */
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static int _dm_snprintf(char *buf, size_t bufsize, const char *format, ...)
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{
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int n;
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va_list ap;
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va_start(ap, format);
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n = vsnprintf(buf, bufsize, format, ap);
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va_end(ap);
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if (n < 0 || (n > (int) bufsize - 1))
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return -1;
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return n;
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}
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struct dm_tree *dm_tree_create(void)
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{
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struct dm_tree *dtree;
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if (!(dtree = dm_malloc(sizeof(*dtree)))) {
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log_error("dm_tree_create malloc failed");
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return NULL;
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}
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memset(dtree, 0, sizeof(*dtree));
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dtree->root.dtree = dtree;
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list_init(&dtree->root.uses);
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list_init(&dtree->root.used_by);
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dtree->skip_lockfs = 0;
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if (!(dtree->mem = dm_pool_create("dtree", 1024))) {
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log_error("dtree pool creation failed");
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dm_free(dtree);
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return NULL;
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}
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if (!(dtree->devs = dm_hash_create(8))) {
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log_error("dtree hash creation failed");
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dm_pool_destroy(dtree->mem);
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dm_free(dtree);
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return NULL;
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}
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if (!(dtree->uuids = dm_hash_create(32))) {
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log_error("dtree uuid hash creation failed");
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dm_hash_destroy(dtree->devs);
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dm_pool_destroy(dtree->mem);
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dm_free(dtree);
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return NULL;
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}
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return dtree;
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}
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void dm_tree_free(struct dm_tree *dtree)
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{
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if (!dtree)
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return;
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dm_hash_destroy(dtree->uuids);
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dm_hash_destroy(dtree->devs);
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dm_pool_destroy(dtree->mem);
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dm_free(dtree);
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}
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static int _nodes_are_linked(struct dm_tree_node *parent,
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struct dm_tree_node *child)
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{
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struct dm_tree_link *dlink;
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list_iterate_items(dlink, &parent->uses)
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if (dlink->node == child)
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return 1;
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return 0;
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}
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static int _link(struct list *list, struct dm_tree_node *node)
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{
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struct dm_tree_link *dlink;
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if (!(dlink = dm_pool_alloc(node->dtree->mem, sizeof(*dlink)))) {
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log_error("dtree link allocation failed");
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return 0;
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}
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dlink->node = node;
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list_add(list, &dlink->list);
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return 1;
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}
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static int _link_nodes(struct dm_tree_node *parent,
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struct dm_tree_node *child)
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{
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if (_nodes_are_linked(parent, child))
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return 1;
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if (!_link(&parent->uses, child))
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return 0;
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if (!_link(&child->used_by, parent))
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return 0;
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return 1;
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}
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static void _unlink(struct list *list, struct dm_tree_node *node)
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{
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struct dm_tree_link *dlink;
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list_iterate_items(dlink, list)
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if (dlink->node == node) {
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list_del(&dlink->list);
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break;
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}
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}
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static void _unlink_nodes(struct dm_tree_node *parent,
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struct dm_tree_node *child)
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{
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if (!_nodes_are_linked(parent, child))
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return;
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_unlink(&parent->uses, child);
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_unlink(&child->used_by, parent);
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}
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static int _add_to_toplevel(struct dm_tree_node *node)
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{
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return _link_nodes(&node->dtree->root, node);
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}
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static void _remove_from_toplevel(struct dm_tree_node *node)
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{
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return _unlink_nodes(&node->dtree->root, node);
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}
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static int _add_to_bottomlevel(struct dm_tree_node *node)
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{
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return _link_nodes(node, &node->dtree->root);
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}
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static void _remove_from_bottomlevel(struct dm_tree_node *node)
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{
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return _unlink_nodes(node, &node->dtree->root);
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}
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static int _link_tree_nodes(struct dm_tree_node *parent, struct dm_tree_node *child)
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{
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/* Don't link to root node if child already has a parent */
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if ((parent == &parent->dtree->root)) {
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if (dm_tree_node_num_children(child, 1))
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return 1;
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} else
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_remove_from_toplevel(child);
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if ((child == &child->dtree->root)) {
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if (dm_tree_node_num_children(parent, 0))
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return 1;
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} else
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_remove_from_bottomlevel(parent);
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return _link_nodes(parent, child);
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}
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static struct dm_tree_node *_create_dm_tree_node(struct dm_tree *dtree,
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const char *name,
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const char *uuid,
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struct dm_info *info,
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void *context)
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{
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struct dm_tree_node *node;
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uint64_t dev;
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if (!(node = dm_pool_zalloc(dtree->mem, sizeof(*node)))) {
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log_error("_create_dm_tree_node alloc failed");
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return NULL;
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}
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node->dtree = dtree;
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node->name = name;
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node->uuid = uuid;
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node->info = *info;
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node->context = context;
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node->activation_priority = 0;
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list_init(&node->uses);
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list_init(&node->used_by);
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list_init(&node->props.segs);
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dev = MKDEV(info->major, info->minor);
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if (!dm_hash_insert_binary(dtree->devs, (const char *) &dev,
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sizeof(dev), node)) {
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log_error("dtree node hash insertion failed");
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dm_pool_free(dtree->mem, node);
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return NULL;
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}
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if (uuid && *uuid &&
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!dm_hash_insert(dtree->uuids, uuid, node)) {
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log_error("dtree uuid hash insertion failed");
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dm_hash_remove_binary(dtree->devs, (const char *) &dev,
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sizeof(dev));
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dm_pool_free(dtree->mem, node);
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return NULL;
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}
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return node;
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}
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static struct dm_tree_node *_find_dm_tree_node(struct dm_tree *dtree,
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uint32_t major, uint32_t minor)
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{
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uint64_t dev = MKDEV(major, minor);
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return dm_hash_lookup_binary(dtree->devs, (const char *) &dev,
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sizeof(dev));
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}
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static struct dm_tree_node *_find_dm_tree_node_by_uuid(struct dm_tree *dtree,
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const char *uuid)
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{
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struct dm_tree_node *node;
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if ((node = dm_hash_lookup(dtree->uuids, uuid)))
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return node;
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if (strncmp(uuid, UUID_PREFIX, sizeof(UUID_PREFIX) - 1))
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return NULL;
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return dm_hash_lookup(dtree->uuids, uuid + sizeof(UUID_PREFIX) - 1);
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}
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static int _deps(struct dm_task **dmt, struct dm_pool *mem, uint32_t major, uint32_t minor,
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const char **name, const char **uuid,
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struct dm_info *info, struct dm_deps **deps)
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{
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memset(info, 0, sizeof(*info));
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if (!dm_is_dm_major(major)) {
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*name = "";
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*uuid = "";
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*deps = NULL;
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info->major = major;
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info->minor = minor;
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info->exists = 0;
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info->live_table = 0;
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info->inactive_table = 0;
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info->read_only = 0;
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return 1;
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}
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if (!(*dmt = dm_task_create(DM_DEVICE_DEPS))) {
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log_error("deps dm_task creation failed");
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return 0;
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}
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if (!dm_task_set_major(*dmt, major)) {
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log_error("_deps: failed to set major for (%" PRIu32 ":%" PRIu32 ")",
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major, minor);
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goto failed;
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}
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if (!dm_task_set_minor(*dmt, minor)) {
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log_error("_deps: failed to set minor for (%" PRIu32 ":%" PRIu32 ")",
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major, minor);
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goto failed;
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}
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if (!dm_task_run(*dmt)) {
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log_error("_deps: task run failed for (%" PRIu32 ":%" PRIu32 ")",
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major, minor);
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goto failed;
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}
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if (!dm_task_get_info(*dmt, info)) {
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log_error("_deps: failed to get info for (%" PRIu32 ":%" PRIu32 ")",
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major, minor);
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goto failed;
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}
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if (!info->exists) {
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*name = "";
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*uuid = "";
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*deps = NULL;
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} else {
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if (info->major != major) {
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log_error("Inconsistent dtree major number: %u != %u",
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major, info->major);
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goto failed;
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}
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if (info->minor != minor) {
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log_error("Inconsistent dtree minor number: %u != %u",
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minor, info->minor);
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goto failed;
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}
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if (!(*name = dm_pool_strdup(mem, dm_task_get_name(*dmt)))) {
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log_error("name pool_strdup failed");
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goto failed;
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}
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if (!(*uuid = dm_pool_strdup(mem, dm_task_get_uuid(*dmt)))) {
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log_error("uuid pool_strdup failed");
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goto failed;
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}
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*deps = dm_task_get_deps(*dmt);
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}
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return 1;
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failed:
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dm_task_destroy(*dmt);
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return 0;
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}
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static struct dm_tree_node *_add_dev(struct dm_tree *dtree,
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struct dm_tree_node *parent,
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uint32_t major, uint32_t minor)
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{
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struct dm_task *dmt = NULL;
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struct dm_info info;
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struct dm_deps *deps = NULL;
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const char *name = NULL;
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const char *uuid = NULL;
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struct dm_tree_node *node = NULL;
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uint32_t i;
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int new = 0;
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|
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/* Already in tree? */
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if (!(node = _find_dm_tree_node(dtree, major, minor))) {
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if (!_deps(&dmt, dtree->mem, major, minor, &name, &uuid, &info, &deps))
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return_NULL;
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|
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if (!(node = _create_dm_tree_node(dtree, name, uuid,
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&info, NULL)))
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goto_out;
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new = 1;
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}
|
|
|
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if (!_link_tree_nodes(parent, node)) {
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node = NULL;
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goto_out;
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}
|
|
|
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/* If node was already in tree, no need to recurse. */
|
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if (!new)
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goto out;
|
|
|
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/* Can't recurse if not a mapped device or there are no dependencies */
|
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if (!node->info.exists || !deps->count) {
|
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if (!_add_to_bottomlevel(node)) {
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stack;
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node = NULL;
|
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}
|
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goto out;
|
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}
|
|
|
|
/* Add dependencies to tree */
|
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for (i = 0; i < deps->count; i++)
|
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if (!_add_dev(dtree, node, MAJOR(deps->device[i]),
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MINOR(deps->device[i]))) {
|
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node = NULL;
|
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goto_out;
|
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}
|
|
|
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out:
|
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if (dmt)
|
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dm_task_destroy(dmt);
|
|
|
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return node;
|
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}
|
|
|
|
static int _node_clear_table(struct dm_tree_node *dnode)
|
|
{
|
|
struct dm_task *dmt;
|
|
struct dm_info *info;
|
|
const char *name;
|
|
int r;
|
|
|
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if (!(info = &dnode->info)) {
|
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log_error("_node_clear_table failed: missing info");
|
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return 0;
|
|
}
|
|
|
|
if (!(name = dm_tree_node_get_name(dnode))) {
|
|
log_error("_node_clear_table failed: missing name");
|
|
return 0;
|
|
}
|
|
|
|
/* Is there a table? */
|
|
if (!info->exists || !info->inactive_table)
|
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return 1;
|
|
|
|
log_verbose("Clearing inactive table %s (%" PRIu32 ":%" PRIu32 ")",
|
|
name, info->major, info->minor);
|
|
|
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if (!(dmt = dm_task_create(DM_DEVICE_CLEAR))) {
|
|
dm_task_destroy(dmt);
|
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log_error("Table clear dm_task creation failed for %s", name);
|
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return 0;
|
|
}
|
|
|
|
if (!dm_task_set_major(dmt, info->major) ||
|
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!dm_task_set_minor(dmt, info->minor)) {
|
|
log_error("Failed to set device number for %s table clear", name);
|
|
dm_task_destroy(dmt);
|
|
return 0;
|
|
}
|
|
|
|
r = dm_task_run(dmt);
|
|
|
|
if (!dm_task_get_info(dmt, info)) {
|
|
log_error("_node_clear_table failed: info missing after running task for %s", name);
|
|
r = 0;
|
|
}
|
|
|
|
dm_task_destroy(dmt);
|
|
|
|
return r;
|
|
}
|
|
|
|
struct dm_tree_node *dm_tree_add_new_dev(struct dm_tree *dtree,
|
|
const char *name,
|
|
const char *uuid,
|
|
uint32_t major, uint32_t minor,
|
|
int read_only,
|
|
int clear_inactive,
|
|
void *context)
|
|
{
|
|
struct dm_tree_node *dnode;
|
|
struct dm_info info;
|
|
const char *name2;
|
|
const char *uuid2;
|
|
|
|
/* Do we need to add node to tree? */
|
|
if (!(dnode = dm_tree_find_node_by_uuid(dtree, uuid))) {
|
|
if (!(name2 = dm_pool_strdup(dtree->mem, name))) {
|
|
log_error("name pool_strdup failed");
|
|
return NULL;
|
|
}
|
|
if (!(uuid2 = dm_pool_strdup(dtree->mem, uuid))) {
|
|
log_error("uuid pool_strdup failed");
|
|
return NULL;
|
|
}
|
|
|
|
info.major = 0;
|
|
info.minor = 0;
|
|
info.exists = 0;
|
|
info.live_table = 0;
|
|
info.inactive_table = 0;
|
|
info.read_only = 0;
|
|
|
|
if (!(dnode = _create_dm_tree_node(dtree, name2, uuid2,
|
|
&info, context)))
|
|
return_NULL;
|
|
|
|
/* Attach to root node until a table is supplied */
|
|
if (!_add_to_toplevel(dnode) || !_add_to_bottomlevel(dnode))
|
|
return_NULL;
|
|
|
|
dnode->props.major = major;
|
|
dnode->props.minor = minor;
|
|
dnode->props.new_name = NULL;
|
|
} else if (strcmp(name, dnode->name)) {
|
|
/* Do we need to rename node? */
|
|
if (!(dnode->props.new_name = dm_pool_strdup(dtree->mem, name))) {
|
|
log_error("name pool_strdup failed");
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
dnode->props.read_only = read_only ? 1 : 0;
|
|
|
|
if (clear_inactive && !_node_clear_table(dnode))
|
|
return_NULL;
|
|
|
|
dnode->context = context;
|
|
|
|
return dnode;
|
|
}
|
|
|
|
int dm_tree_add_dev(struct dm_tree *dtree, uint32_t major, uint32_t minor)
|
|
{
|
|
return _add_dev(dtree, &dtree->root, major, minor) ? 1 : 0;
|
|
}
|
|
|
|
const char *dm_tree_node_get_name(struct dm_tree_node *node)
|
|
{
|
|
return node->info.exists ? node->name : "";
|
|
}
|
|
|
|
const char *dm_tree_node_get_uuid(struct dm_tree_node *node)
|
|
{
|
|
return node->info.exists ? node->uuid : "";
|
|
}
|
|
|
|
const struct dm_info *dm_tree_node_get_info(struct dm_tree_node *node)
|
|
{
|
|
return &node->info;
|
|
}
|
|
|
|
void *dm_tree_node_get_context(struct dm_tree_node *node)
|
|
{
|
|
return node->context;
|
|
}
|
|
|
|
int dm_tree_node_num_children(struct dm_tree_node *node, uint32_t inverted)
|
|
{
|
|
if (inverted) {
|
|
if (_nodes_are_linked(&node->dtree->root, node))
|
|
return 0;
|
|
return list_size(&node->used_by);
|
|
}
|
|
|
|
if (_nodes_are_linked(node, &node->dtree->root))
|
|
return 0;
|
|
|
|
return list_size(&node->uses);
|
|
}
|
|
|
|
/*
|
|
* Returns 1 if no prefix supplied
|
|
*/
|
|
static int _uuid_prefix_matches(const char *uuid, const char *uuid_prefix, size_t uuid_prefix_len)
|
|
{
|
|
if (!uuid_prefix)
|
|
return 1;
|
|
|
|
if (!strncmp(uuid, uuid_prefix, uuid_prefix_len))
|
|
return 1;
|
|
|
|
/* Handle transition: active device uuids might be missing the prefix */
|
|
if (uuid_prefix_len <= 4)
|
|
return 0;
|
|
|
|
if (!strncmp(uuid, UUID_PREFIX, sizeof(UUID_PREFIX) - 1))
|
|
return 0;
|
|
|
|
if (strncmp(uuid_prefix, UUID_PREFIX, sizeof(UUID_PREFIX) - 1))
|
|
return 0;
|
|
|
|
if (!strncmp(uuid, uuid_prefix + sizeof(UUID_PREFIX) - 1, uuid_prefix_len - (sizeof(UUID_PREFIX) - 1)))
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Returns 1 if no children.
|
|
*/
|
|
static int _children_suspended(struct dm_tree_node *node,
|
|
uint32_t inverted,
|
|
const char *uuid_prefix,
|
|
size_t uuid_prefix_len)
|
|
{
|
|
struct list *list;
|
|
struct dm_tree_link *dlink;
|
|
const struct dm_info *dinfo;
|
|
const char *uuid;
|
|
|
|
if (inverted) {
|
|
if (_nodes_are_linked(&node->dtree->root, node))
|
|
return 1;
|
|
list = &node->used_by;
|
|
} else {
|
|
if (_nodes_are_linked(node, &node->dtree->root))
|
|
return 1;
|
|
list = &node->uses;
|
|
}
|
|
|
|
list_iterate_items(dlink, list) {
|
|
if (!(uuid = dm_tree_node_get_uuid(dlink->node))) {
|
|
stack;
|
|
continue;
|
|
}
|
|
|
|
/* Ignore if it doesn't belong to this VG */
|
|
if (!_uuid_prefix_matches(uuid, uuid_prefix, uuid_prefix_len))
|
|
continue;
|
|
|
|
if (!(dinfo = dm_tree_node_get_info(dlink->node))) {
|
|
stack; /* FIXME Is this normal? */
|
|
return 0;
|
|
}
|
|
|
|
if (!dinfo->suspended)
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Set major and minor to zero for root of tree.
|
|
*/
|
|
struct dm_tree_node *dm_tree_find_node(struct dm_tree *dtree,
|
|
uint32_t major,
|
|
uint32_t minor)
|
|
{
|
|
if (!major && !minor)
|
|
return &dtree->root;
|
|
|
|
return _find_dm_tree_node(dtree, major, minor);
|
|
}
|
|
|
|
/*
|
|
* Set uuid to NULL for root of tree.
|
|
*/
|
|
struct dm_tree_node *dm_tree_find_node_by_uuid(struct dm_tree *dtree,
|
|
const char *uuid)
|
|
{
|
|
if (!uuid || !*uuid)
|
|
return &dtree->root;
|
|
|
|
return _find_dm_tree_node_by_uuid(dtree, uuid);
|
|
}
|
|
|
|
/*
|
|
* First time set *handle to NULL.
|
|
* Set inverted to invert the tree.
|
|
*/
|
|
struct dm_tree_node *dm_tree_next_child(void **handle,
|
|
struct dm_tree_node *parent,
|
|
uint32_t inverted)
|
|
{
|
|
struct list **dlink = (struct list **) handle;
|
|
struct list *use_list;
|
|
|
|
if (inverted)
|
|
use_list = &parent->used_by;
|
|
else
|
|
use_list = &parent->uses;
|
|
|
|
if (!*dlink)
|
|
*dlink = list_first(use_list);
|
|
else
|
|
*dlink = list_next(use_list, *dlink);
|
|
|
|
return (*dlink) ? list_item(*dlink, struct dm_tree_link)->node : NULL;
|
|
}
|
|
|
|
/*
|
|
* Deactivate a device with its dependencies if the uuid prefix matches.
|
|
*/
|
|
static int _info_by_dev(uint32_t major, uint32_t minor, int with_open_count,
|
|
struct dm_info *info)
|
|
{
|
|
struct dm_task *dmt;
|
|
int r;
|
|
|
|
if (!(dmt = dm_task_create(DM_DEVICE_INFO))) {
|
|
log_error("_info_by_dev: dm_task creation failed");
|
|
return 0;
|
|
}
|
|
|
|
if (!dm_task_set_major(dmt, major) || !dm_task_set_minor(dmt, minor)) {
|
|
log_error("_info_by_dev: Failed to set device number");
|
|
dm_task_destroy(dmt);
|
|
return 0;
|
|
}
|
|
|
|
if (!with_open_count && !dm_task_no_open_count(dmt))
|
|
log_error("Failed to disable open_count");
|
|
|
|
if ((r = dm_task_run(dmt)))
|
|
r = dm_task_get_info(dmt, info);
|
|
|
|
dm_task_destroy(dmt);
|
|
|
|
return r;
|
|
}
|
|
|
|
static int _deactivate_node(const char *name, uint32_t major, uint32_t minor)
|
|
{
|
|
struct dm_task *dmt;
|
|
int r;
|
|
|
|
log_verbose("Removing %s (%" PRIu32 ":%" PRIu32 ")", name, major, minor);
|
|
|
|
if (!(dmt = dm_task_create(DM_DEVICE_REMOVE))) {
|
|
log_error("Deactivation dm_task creation failed for %s", name);
|
|
return 0;
|
|
}
|
|
|
|
if (!dm_task_set_major(dmt, major) || !dm_task_set_minor(dmt, minor)) {
|
|
log_error("Failed to set device number for %s deactivation", name);
|
|
dm_task_destroy(dmt);
|
|
return 0;
|
|
}
|
|
|
|
if (!dm_task_no_open_count(dmt))
|
|
log_error("Failed to disable open_count");
|
|
|
|
r = dm_task_run(dmt);
|
|
|
|
/* FIXME Until kernel returns actual name so dm-ioctl.c can handle it */
|
|
rm_dev_node(name);
|
|
|
|
/* FIXME Remove node from tree or mark invalid? */
|
|
|
|
dm_task_destroy(dmt);
|
|
|
|
return r;
|
|
}
|
|
|
|
static int _rename_node(const char *old_name, const char *new_name, uint32_t major, uint32_t minor)
|
|
{
|
|
struct dm_task *dmt;
|
|
int r = 0;
|
|
|
|
log_verbose("Renaming %s (%" PRIu32 ":%" PRIu32 ") to %s", old_name, major, minor, new_name);
|
|
|
|
if (!(dmt = dm_task_create(DM_DEVICE_RENAME))) {
|
|
log_error("Rename dm_task creation failed for %s", old_name);
|
|
return 0;
|
|
}
|
|
|
|
if (!dm_task_set_name(dmt, old_name)) {
|
|
log_error("Failed to set name for %s rename.", old_name);
|
|
goto out;
|
|
}
|
|
|
|
if (!dm_task_set_newname(dmt, new_name))
|
|
goto_out;
|
|
|
|
if (!dm_task_no_open_count(dmt))
|
|
log_error("Failed to disable open_count");
|
|
|
|
r = dm_task_run(dmt);
|
|
|
|
out:
|
|
dm_task_destroy(dmt);
|
|
|
|
return r;
|
|
}
|
|
|
|
/* FIXME Merge with _suspend_node? */
|
|
static int _resume_node(const char *name, uint32_t major, uint32_t minor,
|
|
struct dm_info *newinfo)
|
|
{
|
|
struct dm_task *dmt;
|
|
int r;
|
|
|
|
log_verbose("Resuming %s (%" PRIu32 ":%" PRIu32 ")", name, major, minor);
|
|
|
|
if (!(dmt = dm_task_create(DM_DEVICE_RESUME))) {
|
|
log_error("Suspend dm_task creation failed for %s", name);
|
|
return 0;
|
|
}
|
|
|
|
if (!dm_task_set_major(dmt, major) || !dm_task_set_minor(dmt, minor)) {
|
|
log_error("Failed to set device number for %s resumption.", name);
|
|
dm_task_destroy(dmt);
|
|
return 0;
|
|
}
|
|
|
|
if (!dm_task_no_open_count(dmt))
|
|
log_error("Failed to disable open_count");
|
|
|
|
if ((r = dm_task_run(dmt)))
|
|
r = dm_task_get_info(dmt, newinfo);
|
|
|
|
dm_task_destroy(dmt);
|
|
|
|
return r;
|
|
}
|
|
|
|
static int _suspend_node(const char *name, uint32_t major, uint32_t minor,
|
|
int skip_lockfs, struct dm_info *newinfo)
|
|
{
|
|
struct dm_task *dmt;
|
|
int r;
|
|
|
|
log_verbose("Suspending %s (%" PRIu32 ":%" PRIu32 ")%s", name, major,
|
|
minor, skip_lockfs ? "" : " with filesystem sync.");
|
|
|
|
if (!(dmt = dm_task_create(DM_DEVICE_SUSPEND))) {
|
|
log_error("Suspend dm_task creation failed for %s", name);
|
|
return 0;
|
|
}
|
|
|
|
if (!dm_task_set_major(dmt, major) || !dm_task_set_minor(dmt, minor)) {
|
|
log_error("Failed to set device number for %s suspension.", name);
|
|
dm_task_destroy(dmt);
|
|
return 0;
|
|
}
|
|
|
|
if (!dm_task_no_open_count(dmt))
|
|
log_error("Failed to disable open_count");
|
|
|
|
if (skip_lockfs && !dm_task_skip_lockfs(dmt))
|
|
log_error("Failed to set skip_lockfs flag.");
|
|
|
|
if ((r = dm_task_run(dmt)))
|
|
r = dm_task_get_info(dmt, newinfo);
|
|
|
|
dm_task_destroy(dmt);
|
|
|
|
return r;
|
|
}
|
|
|
|
int dm_tree_deactivate_children(struct dm_tree_node *dnode,
|
|
const char *uuid_prefix,
|
|
size_t uuid_prefix_len)
|
|
{
|
|
void *handle = NULL;
|
|
struct dm_tree_node *child = dnode;
|
|
struct dm_info info;
|
|
const struct dm_info *dinfo;
|
|
const char *name;
|
|
const char *uuid;
|
|
|
|
while ((child = dm_tree_next_child(&handle, dnode, 0))) {
|
|
if (!(dinfo = dm_tree_node_get_info(child))) {
|
|
stack;
|
|
continue;
|
|
}
|
|
|
|
if (!(name = dm_tree_node_get_name(child))) {
|
|
stack;
|
|
continue;
|
|
}
|
|
|
|
if (!(uuid = dm_tree_node_get_uuid(child))) {
|
|
stack;
|
|
continue;
|
|
}
|
|
|
|
/* Ignore if it doesn't belong to this VG */
|
|
if (!_uuid_prefix_matches(uuid, uuid_prefix, uuid_prefix_len))
|
|
continue;
|
|
|
|
/* Refresh open_count */
|
|
if (!_info_by_dev(dinfo->major, dinfo->minor, 1, &info) ||
|
|
!info.exists || info.open_count)
|
|
continue;
|
|
|
|
if (!_deactivate_node(name, info.major, info.minor)) {
|
|
log_error("Unable to deactivate %s (%" PRIu32
|
|
":%" PRIu32 ")", name, info.major,
|
|
info.minor);
|
|
continue;
|
|
}
|
|
|
|
if (dm_tree_node_num_children(child, 0))
|
|
dm_tree_deactivate_children(child, uuid_prefix, uuid_prefix_len);
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
void dm_tree_skip_lockfs(struct dm_tree_node *dnode)
|
|
{
|
|
dnode->dtree->skip_lockfs = 1;
|
|
}
|
|
|
|
int dm_tree_suspend_children(struct dm_tree_node *dnode,
|
|
const char *uuid_prefix,
|
|
size_t uuid_prefix_len)
|
|
{
|
|
void *handle = NULL;
|
|
struct dm_tree_node *child = dnode;
|
|
struct dm_info info, newinfo;
|
|
const struct dm_info *dinfo;
|
|
const char *name;
|
|
const char *uuid;
|
|
|
|
/* Suspend nodes at this level of the tree */
|
|
while ((child = dm_tree_next_child(&handle, dnode, 0))) {
|
|
if (!(dinfo = dm_tree_node_get_info(child))) {
|
|
stack;
|
|
continue;
|
|
}
|
|
|
|
if (!(name = dm_tree_node_get_name(child))) {
|
|
stack;
|
|
continue;
|
|
}
|
|
|
|
if (!(uuid = dm_tree_node_get_uuid(child))) {
|
|
stack;
|
|
continue;
|
|
}
|
|
|
|
/* Ignore if it doesn't belong to this VG */
|
|
if (!_uuid_prefix_matches(uuid, uuid_prefix, uuid_prefix_len))
|
|
continue;
|
|
|
|
/* Ensure immediate parents are already suspended */
|
|
if (!_children_suspended(child, 1, uuid_prefix, uuid_prefix_len))
|
|
continue;
|
|
|
|
if (!_info_by_dev(dinfo->major, dinfo->minor, 0, &info) ||
|
|
!info.exists)
|
|
continue;
|
|
|
|
if (!_suspend_node(name, info.major, info.minor,
|
|
child->dtree->skip_lockfs, &newinfo)) {
|
|
log_error("Unable to suspend %s (%" PRIu32
|
|
":%" PRIu32 ")", name, info.major,
|
|
info.minor);
|
|
continue;
|
|
}
|
|
|
|
/* Update cached info */
|
|
child->info = newinfo;
|
|
}
|
|
|
|
/* Then suspend any child nodes */
|
|
handle = NULL;
|
|
|
|
while ((child = dm_tree_next_child(&handle, dnode, 0))) {
|
|
if (!(uuid = dm_tree_node_get_uuid(child))) {
|
|
stack;
|
|
continue;
|
|
}
|
|
|
|
/* Ignore if it doesn't belong to this VG */
|
|
if (!_uuid_prefix_matches(uuid, uuid_prefix, uuid_prefix_len))
|
|
continue;
|
|
|
|
if (dm_tree_node_num_children(child, 0))
|
|
dm_tree_suspend_children(child, uuid_prefix, uuid_prefix_len);
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
int dm_tree_activate_children(struct dm_tree_node *dnode,
|
|
const char *uuid_prefix,
|
|
size_t uuid_prefix_len)
|
|
{
|
|
void *handle = NULL;
|
|
struct dm_tree_node *child = dnode;
|
|
struct dm_info newinfo;
|
|
const char *name;
|
|
const char *uuid;
|
|
int priority;
|
|
|
|
/* Activate children first */
|
|
while ((child = dm_tree_next_child(&handle, dnode, 0))) {
|
|
if (!(uuid = dm_tree_node_get_uuid(child))) {
|
|
stack;
|
|
continue;
|
|
}
|
|
|
|
if (!_uuid_prefix_matches(uuid, uuid_prefix, uuid_prefix_len))
|
|
continue;
|
|
|
|
if (dm_tree_node_num_children(child, 0))
|
|
dm_tree_activate_children(child, uuid_prefix, uuid_prefix_len);
|
|
}
|
|
|
|
handle = NULL;
|
|
|
|
for (priority = 0; priority < 2; priority++) {
|
|
while ((child = dm_tree_next_child(&handle, dnode, 0))) {
|
|
if (!(uuid = dm_tree_node_get_uuid(child))) {
|
|
stack;
|
|
continue;
|
|
}
|
|
|
|
if (!_uuid_prefix_matches(uuid, uuid_prefix, uuid_prefix_len))
|
|
continue;
|
|
|
|
if (priority != child->activation_priority)
|
|
continue;
|
|
|
|
if (!(name = dm_tree_node_get_name(child))) {
|
|
stack;
|
|
continue;
|
|
}
|
|
|
|
/* Rename? */
|
|
if (child->props.new_name) {
|
|
if (!_rename_node(name, child->props.new_name, child->info.major, child->info.minor)) {
|
|
log_error("Failed to rename %s (%" PRIu32
|
|
":%" PRIu32 ") to %s", name, child->info.major,
|
|
child->info.minor, child->props.new_name);
|
|
return 0;
|
|
}
|
|
child->name = child->props.new_name;
|
|
child->props.new_name = NULL;
|
|
}
|
|
|
|
if (!child->info.inactive_table && !child->info.suspended)
|
|
continue;
|
|
|
|
if (!_resume_node(name, child->info.major, child->info.minor, &newinfo)) {
|
|
log_error("Unable to resume %s (%" PRIu32
|
|
":%" PRIu32 ")", name, child->info.major,
|
|
child->info.minor);
|
|
continue;
|
|
}
|
|
|
|
/* Update cached info */
|
|
child->info = newinfo;
|
|
}
|
|
}
|
|
|
|
handle = NULL;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int _create_node(struct dm_tree_node *dnode)
|
|
{
|
|
int r = 0;
|
|
struct dm_task *dmt;
|
|
|
|
log_verbose("Creating %s", dnode->name);
|
|
|
|
if (!(dmt = dm_task_create(DM_DEVICE_CREATE))) {
|
|
log_error("Create dm_task creation failed for %s", dnode->name);
|
|
return 0;
|
|
}
|
|
|
|
if (!dm_task_set_name(dmt, dnode->name)) {
|
|
log_error("Failed to set device name for %s", dnode->name);
|
|
goto out;
|
|
}
|
|
|
|
if (!dm_task_set_uuid(dmt, dnode->uuid)) {
|
|
log_error("Failed to set uuid for %s", dnode->name);
|
|
goto out;
|
|
}
|
|
|
|
if (dnode->props.major &&
|
|
(!dm_task_set_major(dmt, dnode->props.major) ||
|
|
!dm_task_set_minor(dmt, dnode->props.minor))) {
|
|
log_error("Failed to set device number for %s creation.", dnode->name);
|
|
goto out;
|
|
}
|
|
|
|
if (dnode->props.read_only && !dm_task_set_ro(dmt)) {
|
|
log_error("Failed to set read only flag for %s", dnode->name);
|
|
goto out;
|
|
}
|
|
|
|
if (!dm_task_no_open_count(dmt))
|
|
log_error("Failed to disable open_count");
|
|
|
|
if ((r = dm_task_run(dmt)))
|
|
r = dm_task_get_info(dmt, &dnode->info);
|
|
|
|
out:
|
|
dm_task_destroy(dmt);
|
|
|
|
return r;
|
|
}
|
|
|
|
|
|
static int _build_dev_string(char *devbuf, size_t bufsize, struct dm_tree_node *node)
|
|
{
|
|
if (!dm_format_dev(devbuf, bufsize, node->info.major, node->info.minor)) {
|
|
log_error("Failed to format %s device number for %s as dm "
|
|
"target (%u,%u)",
|
|
node->name, node->uuid, node->info.major, node->info.minor);
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int _emit_areas_line(struct dm_task *dmt, struct load_segment *seg, char *params, size_t paramsize, int *pos)
|
|
{
|
|
struct seg_area *area;
|
|
char devbuf[10];
|
|
int tw;
|
|
const char *prefix = "";
|
|
|
|
list_iterate_items(area, &seg->areas) {
|
|
if (!_build_dev_string(devbuf, sizeof(devbuf), area->dev_node))
|
|
return_0;
|
|
|
|
if ((tw = _dm_snprintf(params + *pos, paramsize - *pos, "%s%s %" PRIu64,
|
|
prefix, devbuf, area->offset)) < 0) {
|
|
stack; /* Out of space */
|
|
return -1;
|
|
}
|
|
|
|
prefix = " ";
|
|
*pos += tw;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int _emit_segment_line(struct dm_task *dmt, struct load_segment *seg, uint64_t *seg_start, char *params, size_t paramsize)
|
|
{
|
|
unsigned log_parm_count;
|
|
int pos = 0;
|
|
int tw;
|
|
int r;
|
|
char originbuf[10], cowbuf[10], logbuf[10];
|
|
const char *logtype;
|
|
|
|
switch(seg->type) {
|
|
case SEG_ERROR:
|
|
case SEG_ZERO:
|
|
params[0] = '\0';
|
|
case SEG_LINEAR:
|
|
break;
|
|
case SEG_MIRRORED:
|
|
log_parm_count = 1; /* Region size */
|
|
log_parm_count += hweight32(seg->flags); /* [no]sync, block_on_error etc. */
|
|
|
|
if (seg->flags & DM_CORELOG)
|
|
log_parm_count--; /* DM_CORELOG does not count in the param list */
|
|
|
|
if (seg->clustered) {
|
|
if (seg->uuid)
|
|
log_parm_count++;
|
|
if ((tw = _dm_snprintf(params + pos, paramsize - pos, "clustered_")) < 0) {
|
|
stack; /* Out of space */
|
|
return -1;
|
|
}
|
|
pos += tw;
|
|
}
|
|
|
|
if (!seg->log)
|
|
logtype = "core";
|
|
else {
|
|
logtype = "disk";
|
|
log_parm_count++;
|
|
if (!_build_dev_string(logbuf, sizeof(logbuf), seg->log))
|
|
return_0;
|
|
}
|
|
|
|
if ((tw = _dm_snprintf(params + pos, paramsize - pos, "%s %u ", logtype, log_parm_count)) < 0) {
|
|
stack; /* Out of space */
|
|
return -1;
|
|
}
|
|
pos += tw;
|
|
|
|
if (seg->log) {
|
|
if ((tw = _dm_snprintf(params + pos, paramsize - pos, "%s ", logbuf)) < 0) {
|
|
stack; /* Out of space */
|
|
return -1;
|
|
}
|
|
pos += tw;
|
|
}
|
|
|
|
if ((tw = _dm_snprintf(params + pos, paramsize - pos, "%u ", seg->region_size)) < 0) {
|
|
stack; /* Out of space */
|
|
return -1;
|
|
}
|
|
pos += tw;
|
|
|
|
if (seg->clustered && seg->uuid) {
|
|
if ((tw = _dm_snprintf(params + pos, paramsize - pos, "%s ", seg->uuid)) < 0) {
|
|
stack; /* Out of space */
|
|
return -1;
|
|
}
|
|
pos += tw;
|
|
}
|
|
|
|
if ((seg->flags & DM_NOSYNC)) {
|
|
if ((tw = _dm_snprintf(params + pos, paramsize - pos, "nosync ")) < 0) {
|
|
stack; /* Out of space */
|
|
return -1;
|
|
}
|
|
pos += tw;
|
|
} else if ((seg->flags & DM_FORCESYNC)) {
|
|
if ((tw = _dm_snprintf(params + pos, paramsize - pos, "sync ")) < 0) {
|
|
stack; /* Out of space */
|
|
return -1;
|
|
}
|
|
pos += tw;
|
|
}
|
|
|
|
if ((seg->flags & DM_BLOCK_ON_ERROR)) {
|
|
if ((tw = _dm_snprintf(params + pos, paramsize - pos, "block_on_error ")) < 0) {
|
|
stack; /* Out of space */
|
|
return -1;
|
|
}
|
|
pos += tw;
|
|
}
|
|
|
|
if ((tw = _dm_snprintf(params + pos, paramsize - pos, "%u ", seg->mirror_area_count)) < 0) {
|
|
stack; /* Out of space */
|
|
return -1;
|
|
}
|
|
pos += tw;
|
|
|
|
break;
|
|
case SEG_SNAPSHOT:
|
|
if (!_build_dev_string(originbuf, sizeof(originbuf), seg->origin))
|
|
return_0;
|
|
if (!_build_dev_string(cowbuf, sizeof(cowbuf), seg->cow))
|
|
return_0;
|
|
if ((pos = _dm_snprintf(params, paramsize, "%s %s %c %d",
|
|
originbuf, cowbuf,
|
|
seg->persistent ? 'P' : 'N',
|
|
seg->chunk_size)) < 0) {
|
|
stack; /* Out of space */
|
|
return -1;
|
|
}
|
|
break;
|
|
case SEG_SNAPSHOT_ORIGIN:
|
|
if (!_build_dev_string(originbuf, sizeof(originbuf), seg->origin))
|
|
return_0;
|
|
if ((pos = _dm_snprintf(params, paramsize, "%s",
|
|
originbuf)) < 0) {
|
|
stack; /* Out of space */
|
|
return -1;
|
|
}
|
|
break;
|
|
case SEG_STRIPED:
|
|
if ((pos = _dm_snprintf(params, paramsize, "%u %u ",
|
|
seg->area_count,
|
|
seg->stripe_size)) < 0) {
|
|
stack; /* Out of space */
|
|
return -1;
|
|
}
|
|
break;
|
|
}
|
|
|
|
switch(seg->type) {
|
|
case SEG_ERROR:
|
|
case SEG_SNAPSHOT:
|
|
case SEG_SNAPSHOT_ORIGIN:
|
|
case SEG_ZERO:
|
|
break;
|
|
case SEG_LINEAR:
|
|
case SEG_MIRRORED:
|
|
case SEG_STRIPED:
|
|
if ((r = _emit_areas_line(dmt, seg, params, paramsize, &pos)) <= 0) {
|
|
stack;
|
|
return r;
|
|
}
|
|
break;
|
|
}
|
|
|
|
log_debug("Adding target: %" PRIu64 " %" PRIu64 " %s %s",
|
|
*seg_start, seg->size, dm_segtypes[seg->type].target, params);
|
|
|
|
if (!dm_task_add_target(dmt, *seg_start, seg->size, dm_segtypes[seg->type].target, params))
|
|
return_0;
|
|
|
|
*seg_start += seg->size;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int _emit_segment(struct dm_task *dmt, struct load_segment *seg,
|
|
uint64_t *seg_start)
|
|
{
|
|
char *params;
|
|
size_t paramsize = 4096;
|
|
int ret;
|
|
|
|
do {
|
|
if (!(params = dm_malloc(paramsize))) {
|
|
log_error("Insufficient space for target parameters.");
|
|
return 0;
|
|
}
|
|
|
|
ret = _emit_segment_line(dmt, seg, seg_start, params, paramsize);
|
|
dm_free(params);
|
|
|
|
if (!ret)
|
|
stack;
|
|
|
|
if (ret >= 0)
|
|
return ret;
|
|
|
|
log_debug("Insufficient space in params[%" PRIsize_t
|
|
"] for target parameters.", paramsize);
|
|
|
|
paramsize *= 2;
|
|
} while (paramsize < MAX_TARGET_PARAMSIZE);
|
|
|
|
log_error("Target parameter size too big. Aborting.");
|
|
return 0;
|
|
}
|
|
|
|
static int _load_node(struct dm_tree_node *dnode)
|
|
{
|
|
int r = 0;
|
|
struct dm_task *dmt;
|
|
struct load_segment *seg;
|
|
uint64_t seg_start = 0;
|
|
|
|
log_verbose("Loading %s table", dnode->name);
|
|
|
|
if (!(dmt = dm_task_create(DM_DEVICE_RELOAD))) {
|
|
log_error("Reload dm_task creation failed for %s", dnode->name);
|
|
return 0;
|
|
}
|
|
|
|
if (!dm_task_set_major(dmt, dnode->info.major) ||
|
|
!dm_task_set_minor(dmt, dnode->info.minor)) {
|
|
log_error("Failed to set device number for %s reload.", dnode->name);
|
|
goto out;
|
|
}
|
|
|
|
if (dnode->props.read_only && !dm_task_set_ro(dmt)) {
|
|
log_error("Failed to set read only flag for %s", dnode->name);
|
|
goto out;
|
|
}
|
|
|
|
if (!dm_task_no_open_count(dmt))
|
|
log_error("Failed to disable open_count");
|
|
|
|
list_iterate_items(seg, &dnode->props.segs)
|
|
if (!_emit_segment(dmt, seg, &seg_start))
|
|
goto_out;
|
|
|
|
if (!dm_task_suppress_identical_reload(dmt))
|
|
log_error("Failed to suppress reload of identical tables.");
|
|
|
|
if ((r = dm_task_run(dmt))) {
|
|
r = dm_task_get_info(dmt, &dnode->info);
|
|
if (r && !dnode->info.inactive_table)
|
|
log_verbose("Suppressed %s identical table reload.",
|
|
dnode->name);
|
|
}
|
|
|
|
dnode->props.segment_count = 0;
|
|
|
|
out:
|
|
dm_task_destroy(dmt);
|
|
|
|
return r;
|
|
}
|
|
|
|
int dm_tree_preload_children(struct dm_tree_node *dnode,
|
|
const char *uuid_prefix,
|
|
size_t uuid_prefix_len)
|
|
{
|
|
void *handle = NULL;
|
|
struct dm_tree_node *child;
|
|
struct dm_info newinfo;
|
|
const char *name;
|
|
|
|
/* Preload children first */
|
|
while ((child = dm_tree_next_child(&handle, dnode, 0))) {
|
|
/* Skip existing non-device-mapper devices */
|
|
if (!child->info.exists && child->info.major)
|
|
continue;
|
|
|
|
/* Ignore if it doesn't belong to this VG */
|
|
if (child->info.exists &&
|
|
!_uuid_prefix_matches(child->uuid, uuid_prefix, uuid_prefix_len))
|
|
continue;
|
|
|
|
if (dm_tree_node_num_children(child, 0))
|
|
dm_tree_preload_children(child, uuid_prefix, uuid_prefix_len);
|
|
|
|
if (!(name = dm_tree_node_get_name(child))) {
|
|
stack;
|
|
continue;
|
|
}
|
|
|
|
/* FIXME Cope if name exists with no uuid? */
|
|
if (!child->info.exists) {
|
|
if (!_create_node(child)) {
|
|
stack;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
if (!child->info.inactive_table && child->props.segment_count) {
|
|
if (!_load_node(child)) {
|
|
stack;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/* Resume device immediately if it has parents */
|
|
if (!dm_tree_node_num_children(child, 1))
|
|
continue;
|
|
|
|
if (!child->info.inactive_table && !child->info.suspended)
|
|
continue;
|
|
|
|
if (!_resume_node(name, child->info.major, child->info.minor, &newinfo)) {
|
|
log_error("Unable to resume %s (%" PRIu32
|
|
":%" PRIu32 ")", name, child->info.major,
|
|
child->info.minor);
|
|
continue;
|
|
}
|
|
|
|
/* Update cached info */
|
|
child->info = newinfo;
|
|
}
|
|
|
|
handle = NULL;
|
|
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Returns 1 if unsure.
|
|
*/
|
|
int dm_tree_children_use_uuid(struct dm_tree_node *dnode,
|
|
const char *uuid_prefix,
|
|
size_t uuid_prefix_len)
|
|
{
|
|
void *handle = NULL;
|
|
struct dm_tree_node *child = dnode;
|
|
const char *uuid;
|
|
|
|
while ((child = dm_tree_next_child(&handle, dnode, 0))) {
|
|
if (!(uuid = dm_tree_node_get_uuid(child))) {
|
|
log_error("Failed to get uuid for dtree node.");
|
|
return 1;
|
|
}
|
|
|
|
if (_uuid_prefix_matches(uuid, uuid_prefix, uuid_prefix_len))
|
|
return 1;
|
|
|
|
if (dm_tree_node_num_children(child, 0))
|
|
dm_tree_children_use_uuid(child, uuid_prefix, uuid_prefix_len);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Target functions
|
|
*/
|
|
static struct load_segment *_add_segment(struct dm_tree_node *dnode, unsigned type, uint64_t size)
|
|
{
|
|
struct load_segment *seg;
|
|
|
|
if (!(seg = dm_pool_zalloc(dnode->dtree->mem, sizeof(*seg)))) {
|
|
log_error("dtree node segment allocation failed");
|
|
return NULL;
|
|
}
|
|
|
|
seg->type = type;
|
|
seg->size = size;
|
|
seg->area_count = 0;
|
|
list_init(&seg->areas);
|
|
seg->stripe_size = 0;
|
|
seg->persistent = 0;
|
|
seg->chunk_size = 0;
|
|
seg->cow = NULL;
|
|
seg->origin = NULL;
|
|
|
|
list_add(&dnode->props.segs, &seg->list);
|
|
dnode->props.segment_count++;
|
|
|
|
return seg;
|
|
}
|
|
|
|
int dm_tree_node_add_snapshot_origin_target(struct dm_tree_node *dnode,
|
|
uint64_t size,
|
|
const char *origin_uuid)
|
|
{
|
|
struct load_segment *seg;
|
|
struct dm_tree_node *origin_node;
|
|
|
|
if (!(seg = _add_segment(dnode, SEG_SNAPSHOT_ORIGIN, size)))
|
|
return_0;
|
|
|
|
if (!(origin_node = dm_tree_find_node_by_uuid(dnode->dtree, origin_uuid))) {
|
|
log_error("Couldn't find snapshot origin uuid %s.", origin_uuid);
|
|
return 0;
|
|
}
|
|
|
|
seg->origin = origin_node;
|
|
if (!_link_tree_nodes(dnode, origin_node))
|
|
return_0;
|
|
|
|
/* Resume snapshot origins after new snapshots */
|
|
dnode->activation_priority = 1;
|
|
|
|
return 1;
|
|
}
|
|
|
|
int dm_tree_node_add_snapshot_target(struct dm_tree_node *node,
|
|
uint64_t size,
|
|
const char *origin_uuid,
|
|
const char *cow_uuid,
|
|
int persistent,
|
|
uint32_t chunk_size)
|
|
{
|
|
struct load_segment *seg;
|
|
struct dm_tree_node *origin_node, *cow_node;
|
|
|
|
if (!(seg = _add_segment(node, SEG_SNAPSHOT, size)))
|
|
return_0;
|
|
|
|
if (!(origin_node = dm_tree_find_node_by_uuid(node->dtree, origin_uuid))) {
|
|
log_error("Couldn't find snapshot origin uuid %s.", origin_uuid);
|
|
return 0;
|
|
}
|
|
|
|
seg->origin = origin_node;
|
|
if (!_link_tree_nodes(node, origin_node))
|
|
return_0;
|
|
|
|
if (!(cow_node = dm_tree_find_node_by_uuid(node->dtree, cow_uuid))) {
|
|
log_error("Couldn't find snapshot origin uuid %s.", cow_uuid);
|
|
return 0;
|
|
}
|
|
|
|
seg->cow = cow_node;
|
|
if (!_link_tree_nodes(node, cow_node))
|
|
return_0;
|
|
|
|
seg->persistent = persistent ? 1 : 0;
|
|
seg->chunk_size = chunk_size;
|
|
|
|
return 1;
|
|
}
|
|
|
|
int dm_tree_node_add_error_target(struct dm_tree_node *node,
|
|
uint64_t size)
|
|
{
|
|
if (!_add_segment(node, SEG_ERROR, size))
|
|
return_0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
int dm_tree_node_add_zero_target(struct dm_tree_node *node,
|
|
uint64_t size)
|
|
{
|
|
if (!_add_segment(node, SEG_ZERO, size))
|
|
return_0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
int dm_tree_node_add_linear_target(struct dm_tree_node *node,
|
|
uint64_t size)
|
|
{
|
|
if (!_add_segment(node, SEG_LINEAR, size))
|
|
return_0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
int dm_tree_node_add_striped_target(struct dm_tree_node *node,
|
|
uint64_t size,
|
|
uint32_t stripe_size)
|
|
{
|
|
struct load_segment *seg;
|
|
|
|
if (!(seg = _add_segment(node, SEG_STRIPED, size)))
|
|
return_0;
|
|
|
|
seg->stripe_size = stripe_size;
|
|
|
|
return 1;
|
|
}
|
|
|
|
int dm_tree_node_add_mirror_target_log(struct dm_tree_node *node,
|
|
uint32_t region_size,
|
|
unsigned clustered,
|
|
const char *log_uuid,
|
|
unsigned area_count,
|
|
uint32_t flags)
|
|
{
|
|
struct dm_tree_node *log_node = NULL;
|
|
struct load_segment *seg;
|
|
|
|
if (!node->props.segment_count) {
|
|
log_error("Internal error: Attempt to add target area to missing segment.");
|
|
return 0;
|
|
}
|
|
|
|
seg = list_item(list_last(&node->props.segs), struct load_segment);
|
|
|
|
if (log_uuid) {
|
|
if (!(seg->uuid = dm_pool_strdup(node->dtree->mem, log_uuid))) {
|
|
log_error("log uuid pool_strdup failed");
|
|
return 0;
|
|
}
|
|
if (!(flags & DM_CORELOG)) {
|
|
if (!(log_node = dm_tree_find_node_by_uuid(node->dtree, log_uuid))) {
|
|
log_error("Couldn't find mirror log uuid %s.", log_uuid);
|
|
return 0;
|
|
}
|
|
|
|
if (!_link_tree_nodes(node, log_node))
|
|
return_0;
|
|
}
|
|
}
|
|
|
|
seg->log = log_node;
|
|
seg->region_size = region_size;
|
|
seg->clustered = clustered;
|
|
seg->mirror_area_count = area_count;
|
|
seg->flags = flags;
|
|
|
|
return 1;
|
|
}
|
|
|
|
int dm_tree_node_add_mirror_target(struct dm_tree_node *node,
|
|
uint64_t size)
|
|
{
|
|
struct load_segment *seg;
|
|
|
|
if (!(seg = _add_segment(node, SEG_MIRRORED, size)))
|
|
return_0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int _add_area(struct dm_tree_node *node, struct load_segment *seg, struct dm_tree_node *dev_node, uint64_t offset)
|
|
{
|
|
struct seg_area *area;
|
|
|
|
if (!(area = dm_pool_zalloc(node->dtree->mem, sizeof (*area)))) {
|
|
log_error("Failed to allocate target segment area.");
|
|
return 0;
|
|
}
|
|
|
|
area->dev_node = dev_node;
|
|
area->offset = offset;
|
|
|
|
list_add(&seg->areas, &area->list);
|
|
seg->area_count++;
|
|
|
|
return 1;
|
|
}
|
|
|
|
int dm_tree_node_add_target_area(struct dm_tree_node *node,
|
|
const char *dev_name,
|
|
const char *uuid,
|
|
uint64_t offset)
|
|
{
|
|
struct load_segment *seg;
|
|
struct stat info;
|
|
struct dm_tree_node *dev_node;
|
|
|
|
if ((!dev_name || !*dev_name) && (!uuid || !*uuid)) {
|
|
log_error("dm_tree_node_add_target_area called without device");
|
|
return 0;
|
|
}
|
|
|
|
if (uuid) {
|
|
if (!(dev_node = dm_tree_find_node_by_uuid(node->dtree, uuid))) {
|
|
log_error("Couldn't find area uuid %s.", uuid);
|
|
return 0;
|
|
}
|
|
if (!_link_tree_nodes(node, dev_node))
|
|
return_0;
|
|
} else {
|
|
if (stat(dev_name, &info) < 0) {
|
|
log_error("Device %s not found.", dev_name);
|
|
return 0;
|
|
}
|
|
|
|
if (!S_ISBLK(info.st_mode)) {
|
|
log_error("Device %s is not a block device.", dev_name);
|
|
return 0;
|
|
}
|
|
|
|
/* FIXME Check correct macro use */
|
|
if (!(dev_node = _add_dev(node->dtree, node, MAJOR(info.st_rdev), MINOR(info.st_rdev))))
|
|
return_0;
|
|
}
|
|
|
|
if (!node->props.segment_count) {
|
|
log_error("Internal error: Attempt to add target area to missing segment.");
|
|
return 0;
|
|
}
|
|
|
|
seg = list_item(list_last(&node->props.segs), struct load_segment);
|
|
|
|
if (!_add_area(node, seg, dev_node, offset))
|
|
return_0;
|
|
|
|
return 1;
|
|
}
|