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git://sourceware.org/git/lvm2.git
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9b640c3684
This refactors the code for autoactivation. Previously, as each PV was found, it would be sent to lvmetad, and the VG would be autoactivated using a non-standard VG processing function (the "activation_handler") called via a function pointer from within the lvmetad notification path. Now, any scanning that the command needs to do (scanning only the named device args, or scanning all devices when there are no args), is done first, before any activation is attempted. During the scans, the VG names are saved. After scanning is complete, process_each_vg is used to do autoactivation of the saved VG names. This makes pvscan activation much more similar to activation done with vgchange or lvchange. The separate autoactivate phase also means that if lvmetad is disabled (either before or during the scan), the command can continue with the activation step by simply not using lvmetad and reverting to disk scanning to do the activation.
125 lines
3.4 KiB
C
125 lines
3.4 KiB
C
/*
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* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
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* Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
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*
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* This file is part of LVM2.
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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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "tools.h"
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static int _lvscan_single_lvmetad(struct cmd_context *cmd, struct logical_volume *lv)
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{
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struct pv_list *pvl;
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struct dm_list all_pvs;
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char pvid_s[64] __attribute__((aligned(8)));
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if (!lvmetad_used())
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return ECMD_PROCESSED;
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dm_list_init(&all_pvs);
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if (!get_pv_list_for_lv(lv->vg->vgmem, lv, &all_pvs))
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return ECMD_FAILED;
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dm_list_iterate_items(pvl, &all_pvs) {
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if (!pvl->pv->dev) {
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if (!id_write_format(&pvl->pv->id, pvid_s, sizeof(pvid_s)))
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stack;
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else
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log_warn("WARNING: Device for PV %s already missing, skipping.",
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pvid_s);
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continue;
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}
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if (!lvmetad_pvscan_single(cmd, pvl->pv->dev, NULL, NULL))
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return ECMD_FAILED;
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}
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return ECMD_PROCESSED;
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}
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static int lvscan_single(struct cmd_context *cmd, struct logical_volume *lv,
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struct processing_handle *handle __attribute__((unused)))
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{
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struct lvinfo info;
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int inkernel, snap_active = 1;
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dm_percent_t snap_percent; /* fused, fsize; */
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const char *active_str, *snapshot_str;
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if (arg_count(cmd, cache_long_ARG))
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return _lvscan_single_lvmetad(cmd, lv);
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if (!arg_count(cmd, all_ARG) && !lv_is_visible(lv))
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return ECMD_PROCESSED;
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inkernel = lv_info(cmd, lv, 0, &info, 0, 0) && info.exists;
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if (lv_is_cow(lv)) {
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if (inkernel &&
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(snap_active = lv_snapshot_percent(lv, &snap_percent)))
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if (snap_percent == DM_PERCENT_INVALID)
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snap_active = 0;
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}
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/* FIXME Add -D arg to skip this! */
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if (inkernel && snap_active)
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active_str = "ACTIVE ";
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else
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active_str = "inactive ";
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if (lv_is_origin(lv))
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snapshot_str = "Original";
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else if (lv_is_cow(lv))
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snapshot_str = "Snapshot";
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else
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snapshot_str = " ";
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log_print_unless_silent("%s%s '%s%s/%s' [%s] %s", active_str, snapshot_str,
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cmd->dev_dir, lv->vg->name, lv->name,
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display_size(cmd, lv->size),
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get_alloc_string(lv->alloc));
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return ECMD_PROCESSED;
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}
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int lvscan(struct cmd_context *cmd, int argc, char **argv)
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{
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const char *reason = NULL;
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if (argc && !arg_count(cmd, cache_long_ARG)) {
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log_error("No additional command line arguments allowed");
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return EINVALID_CMD_LINE;
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}
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if (!lvmetad_used() && arg_is_set(cmd, cache_long_ARG))
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log_verbose("Ignoring lvscan --cache because lvmetad is not in use.");
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/* Needed because this command has NO_LVMETAD_AUTOSCAN. */
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if (lvmetad_used() && (!lvmetad_token_matches(cmd) || lvmetad_is_disabled(cmd, &reason))) {
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if (lvmetad_used() && !lvmetad_pvscan_all_devs(cmd, 0)) {
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log_warn("WARNING: Not using lvmetad because cache update failed.");
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lvmetad_make_unused(cmd);
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}
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if (lvmetad_used() && lvmetad_is_disabled(cmd, &reason)) {
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log_warn("WARNING: Not using lvmetad because %s.", reason);
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lvmetad_make_unused(cmd);
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}
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/*
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* FIXME: doing lvscan --cache after a full scan is pointless.
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* Should the cache case just exit here?
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*/
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}
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return process_each_lv(cmd, argc, argv, 0, NULL,
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&lvscan_single);
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}
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