arg(activevolumegroups_ARG, 'A', "activevolumegroups", NULL, 0, 0)
arg(background_ARG, 'b', "background", NULL, 0, 0)
arg(backgroundfork_ARG, 'b', "background", NULL, 0, 0)
+arg(basevgname_ARG, 'n', "basevgname", string_arg, 0, 0)
arg(blockdevice_ARG, 'b', "blockdevice", NULL, 0, 0)
arg(chunksize_ARG, 'c', "chunksize", size_kb_arg, 0, 0)
arg(clustered_ARG, 'c', "clustered", yes_no_arg, 0, 0)
arg(cache_ARG, 'H', "cache", NULL, 0, 0)
arg(history_ARG, 'H', "history", NULL, 0, 0)
arg(help2_ARG, '?', "", NULL, 0, 0)
+arg(import_ARG, 'i', "import", NULL, 0, 0)
arg(interval_ARG, 'i', "interval", int_arg, 0, 0)
arg(iop_version_ARG, 'i', "iop_version", NULL, 0, 0)
arg(stripes_ARG, 'i', "stripes", int_arg, 0, 0)
--- /dev/null
+/*
+ * Copyright (C) 2016 Red Hat, Inc. All rights reserved.
+ *
+ * This file is part of LVM2.
+ *
+ * This copyrighted material is made available to anyone wishing to use,
+ * modify, copy, or redistribute it subject to the terms and conditions
+ * of the GNU Lesser General Public License v.2.1.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "tools.h"
+#include "lvmcache.h"
+#include "lvmetad-client.h"
+#include "filter.h"
+
+struct vgimportclone_params {
+ unsigned done;
+ unsigned total;
+
+ int import_vg;
+ int found_args;
+ struct dm_list arg_import;
+ const char *base_vgname;
+ const char *old_vgname;
+ const char *new_vgname;
+};
+
+struct vgimportclone_device {
+ struct dm_list list;
+ struct device *dev;
+ unsigned found_in_vg : 1;
+};
+
+static int _vgimportclone_pv_single(struct cmd_context *cmd, struct volume_group *vg,
+ struct physical_volume *pv, struct processing_handle *handle)
+{
+ struct vgimportclone_params *vp = (struct vgimportclone_params *) handle->custom_handle;
+ struct vgimportclone_device *vd;
+
+ if (vg && is_orphan_vg(vg->name)) {
+ log_error("Cannot import clone of orphan PV %s.", dev_name(pv->dev));
+ return ECMD_FAILED;
+ }
+
+ if (!(vd = dm_pool_zalloc(cmd->mem, sizeof(*vd)))) {
+ log_error("alloc failed.");
+ return ECMD_FAILED;
+ }
+
+ vd->dev = pv->dev;
+ dm_list_add(&vp->arg_import, &vd->list);
+
+ log_debug("vgimportclone dev %s VG %s found to import",
+ dev_name(vd->dev), vg ? vg->name : "<none>");
+
+ vp->found_args++;
+
+ return ECMD_PROCESSED;
+}
+
+static int _vgimportclone_vg_single(struct cmd_context *cmd, const char *vg_name,
+ struct volume_group *vg, struct processing_handle *handle)
+{
+ char uuid[64] __attribute__((aligned(8)));
+ struct vgimportclone_params *vp = (struct vgimportclone_params *) handle->custom_handle;
+ struct vgimportclone_device *vd;
+ struct pv_list *pvl, *new_pvl;
+ struct lv_list *lvl;
+ int devs_used_for_lv = 0;
+ int found;
+
+ if (vg_is_exported(vg) && !vp->import_vg) {
+ log_error("VG %s is exported, use the --import option.", vg->name);
+ goto_bad;
+ }
+
+ if (vg_status(vg) & PARTIAL_VG) {
+ log_error("VG %s is partial, it must be complete.", vg->name);
+ goto_bad;
+ }
+
+ /*
+ * N.B. lvs_in_vg_activated() is not smart enough to distinguish
+ * between LVs that are active in the original VG vs the cloned VG
+ * that's being imported, so check DEV_USED_FOR_LV.
+ */
+ dm_list_iterate_items(pvl, &vg->pvs) {
+ if (pvl->pv->dev->flags & DEV_USED_FOR_LV) {
+ log_error("Device %s has active LVs, deactivate first.", dev_name(pvl->pv->dev));
+ devs_used_for_lv++;
+ }
+ }
+
+ if (devs_used_for_lv)
+ goto_bad;
+
+ /*
+ * The arg_import list must match the PVs in VG.
+ */
+
+ dm_list_iterate_items(pvl, &vg->pvs) {
+ found = 0;
+
+ dm_list_iterate_items(vd, &vp->arg_import) {
+ if (pvl->pv->dev != vd->dev)
+ continue;
+ vd->found_in_vg = 1;
+ found = 1;
+ break;
+ }
+
+ if (!found) {
+ if (!id_write_format(&pvl->pv->id, uuid, sizeof(uuid)))
+ goto_bad;
+
+ /* all PVs in the VG must be imported together, pvl is missing from args. */
+ log_error("PV with UUID %s is part of VG %s, but is not included in the devices to import.",
+ uuid, vg->name);
+ log_error("All PVs in the VG must be imported together.");
+ goto_bad;
+ }
+ }
+
+ dm_list_iterate_items(vd, &vp->arg_import) {
+ if (!vd->found_in_vg) {
+ /* device arg is not in the VG. */
+ log_error("Device %s was not found in VG %s.", dev_name(vd->dev), vg->name);
+ log_error("The devices to import must match the devices in the VG.");
+ goto_bad;
+ }
+ }
+
+ /*
+ * Write changes.
+ */
+
+ if (!archive(vg))
+ return_ECMD_FAILED;
+
+ if (vp->import_vg)
+ vg->status &= ~EXPORTED_VG;
+
+ if (!id_create(&vg->id))
+ goto_bad;
+
+ /* Low level vg_write code needs old_name to be set! */
+ vg->old_name = vg->name;
+
+ if (!(vg->name = dm_pool_strdup(vg->vgmem, vp->new_vgname)))
+ goto_bad;
+
+ dm_list_iterate_items(pvl, &vg->pvs) {
+ if (!(new_pvl = dm_pool_zalloc(vg->vgmem, sizeof(*new_pvl))))
+ goto_bad;
+
+ new_pvl->pv = pvl->pv;
+
+ if (!(pvl->pv->vg_name = dm_pool_strdup(vg->vgmem, vp->new_vgname)))
+ goto_bad;
+
+ if (vp->import_vg)
+ new_pvl->pv->status &= ~EXPORTED_VG;
+
+ /* Low level pv_write code needs old_id to be set! */
+ memcpy(&new_pvl->pv->old_id, &new_pvl->pv->id, sizeof(new_pvl->pv->id));
+
+ if (!id_create(&new_pvl->pv->id))
+ goto_bad;
+
+ dm_list_add(&vg->pv_write_list, &new_pvl->list);
+ }
+
+ dm_list_iterate_items(lvl, &vg->lvs)
+ memcpy(&lvl->lv->lvid, &vg->id, sizeof(vg->id));
+
+ if (!vg_write(vg) || !vg_commit(vg))
+ goto_bad;
+
+ return ECMD_PROCESSED;
+bad:
+ return ECMD_FAILED;
+}
+
+int vgimportclone(struct cmd_context *cmd, int argc, char **argv)
+{
+ struct vgimportclone_params vp = { 0 };
+ struct processing_handle *handle = NULL;
+ struct dm_list vgnameids_on_system; /* vgnameid_list */
+ struct vgnameid_list *vgnl;
+ struct vgimportclone_device *vd;
+ struct lvmcache_info *info;
+ const char *vgname;
+ char base_vgname[NAME_LEN] = { 0 };
+ char tmp_vgname[NAME_LEN] = { 0 };
+ unsigned int vgname_count;
+ int lvmetad_rescan = 0;
+ int ret = ECMD_FAILED;
+
+ if (!argc) {
+ log_error("PV names required.");
+ return EINVALID_CMD_LINE;
+ }
+
+ dm_list_init(&vgnameids_on_system);
+ dm_list_init(&vp.arg_import);
+
+ set_pv_notify(cmd);
+
+ vp.import_vg = arg_is_set(cmd, import_ARG);
+
+ if (lvmetad_used()) {
+ lvmetad_set_disabled(cmd, LVMETAD_DISABLE_REASON_DUPLICATES);
+ lvmetad_disconnect();
+ lvmetad_rescan = 1;
+ }
+
+ if (!(handle = init_processing_handle(cmd, NULL))) {
+ log_error("Failed to initialize processing handle.");
+ return ECMD_FAILED;
+ }
+ handle->custom_handle = &vp;
+
+ if (!lock_vol(cmd, VG_GLOBAL, LCK_VG_WRITE, NULL)) {
+ log_error("Unable to obtain global lock.");
+ destroy_processing_handle(cmd, handle);
+ return ECMD_FAILED;
+ }
+
+ if (!lockd_gl(cmd, "ex", 0))
+ goto_out;
+ cmd->lockd_gl_disable = 1;
+
+ /*
+ * Find the devices being imported which are named on the command line.
+ * They may be in the list of unchosen duplicates.
+ */
+
+ log_debug("Finding devices to import.");
+ cmd->command->flags |= ENABLE_DUPLICATE_DEVS;
+ process_each_pv(cmd, argc, argv, NULL, 0, READ_ALLOW_EXPORTED, handle, _vgimportclone_pv_single);
+
+ if (vp.found_args != argc) {
+ log_error("Failed to find all devices.");
+ goto_out;
+ }
+
+ /*
+ * Find the VG name of the PVs being imported, save as old_vgname.
+ * N.B. If vd->dev is a duplicate, then it may not match info->dev.
+ */
+
+ dm_list_iterate_items(vd, &vp.arg_import) {
+ if (!(info = lvmcache_info_from_pvid(vd->dev->pvid, NULL, 0))) {
+ log_error("Failed to find PVID for device %s in lvmcache.", dev_name(vd->dev));
+ goto_out;
+ }
+
+ if (!(vgname = lvmcache_vgname_from_info(info))) {
+ log_error("Failed to find VG name for device %s in lvmcache.", dev_name(vd->dev));
+ goto_out;
+ }
+
+ if (!vp.old_vgname) {
+ if (!(vp.old_vgname = dm_pool_strdup(cmd->mem, vgname)))
+ goto_out;
+ } else {
+ if (strcmp(vp.old_vgname, vgname)) {
+ log_error("Devices must be from the same VG.");
+ goto_out;
+ }
+ }
+ }
+
+ /*
+ * Pick a new VG name, save as new_vgname. The new name begins with
+ * the basevgname or old_vgname, plus a $i suffix, if necessary, to
+ * make it unique. This requires comparing the old_vgname with all the
+ * VG names on the system.
+ */
+
+ if (arg_is_set(cmd, basevgname_ARG)) {
+ snprintf(base_vgname, sizeof(base_vgname) - 1, "%s", arg_str_value(cmd, basevgname_ARG, ""));
+ memcpy(tmp_vgname, base_vgname, NAME_LEN);
+ vgname_count = 0;
+ } else {
+ snprintf(base_vgname, sizeof(base_vgname) - 1, "%s", vp.old_vgname);
+ snprintf(tmp_vgname, sizeof(tmp_vgname) - 1, "%s1", vp.old_vgname);
+ vgname_count = 1;
+ }
+
+ if (!get_vgnameids(cmd, &vgnameids_on_system, NULL, 0))
+ goto_out;
+
+retry_name:
+ dm_list_iterate_items(vgnl, &vgnameids_on_system) {
+ if (!strcmp(vgnl->vg_name, tmp_vgname)) {
+ vgname_count++;
+ snprintf(tmp_vgname, sizeof(tmp_vgname) - 1, "%s%u", base_vgname, vgname_count);
+ goto retry_name;
+ }
+ }
+
+ if (!(vp.new_vgname = dm_pool_strdup(cmd->mem, tmp_vgname)))
+ goto_out;
+ log_debug("Using new VG name %s.", vp.new_vgname);
+
+ /*
+ * Create a device filter so that we are only working with the devices
+ * in arg_import. With the original devs hidden (that arg_import were
+ * cloned from), we can read and write the cloned PVs and VG without
+ * touching the original PVs/VG.
+ */
+
+ init_internal_filtering(1);
+ dm_list_iterate_items(vd, &vp.arg_import)
+ internal_filter_allow(cmd->mem, vd->dev);
+ lvmcache_destroy(cmd, 1, 0);
+ dev_cache_full_scan(cmd->full_filter);
+
+ log_debug("Changing VG %s to %s.", vp.old_vgname, vp.new_vgname);
+
+ /* We don't care if the new name comes before the old in lock order. */
+ lvmcache_lock_ordering(0);
+
+ if (!lock_vol(cmd, vp.new_vgname, LCK_VG_WRITE, NULL)) {
+ log_error("Can't get lock for new VG name %s", vp.new_vgname);
+ goto out;
+ }
+
+ ret = process_each_vg(cmd, 0, NULL, vp.old_vgname, NULL, READ_FOR_UPDATE | READ_ALLOW_EXPORTED, 0, handle, _vgimportclone_vg_single);
+
+ unlock_vg(cmd, vp.new_vgname);
+out:
+ unlock_vg(cmd, VG_GLOBAL);
+ internal_filter_clear();
+ init_internal_filtering(0);
+ lvmcache_lock_ordering(1);
+ destroy_processing_handle(cmd, handle);
+
+ /* Enable lvmetad again if no duplicates are left. */
+ if (lvmetad_rescan) {
+ if (!lvmetad_connect(cmd)) {
+ log_warn("WARNING: Failed to connect to lvmetad.");
+ log_warn("WARNING: Update lvmetad with pvscan --cache.");
+ return ret;
+ }
+
+ if (!refresh_filters(cmd))
+ stack;
+
+ if (!lvmetad_pvscan_all_devs(cmd, 1)) {
+ log_warn("WARNING: Failed to scan devices.");
+ log_warn("WARNING: Update lvmetad with pvscan --cache.");
+ }
+ }
+
+ return ret;
+}
+
git://sourceware.org / lvm2.git / commitdiff