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9c6c55c314
The new check_single_lv() function is called prior to the existing process_single_lv(). If the check function returns 0, the LV will not be processed. The check_single_lv function is meant to be a standard method to validate the combination of specific command + specific LV, and decide if the combination is allowed. The check_single function can be used by anything that calls process_each_lv. As commands are migrated to take advantage of command definitions, each command definition gets its own entry point which calls process_each for itself, passing a pair of check_single/process_single functions which can be specific to the narrowly defined command def.
124 lines
3.4 KiB
C
124 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_is_set(cmd, cache_long_ARG))
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return _lvscan_single_lvmetad(cmd, lv);
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if (!arg_is_set(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_is_set(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, NULL, NULL, 0, NULL, NULL, &lvscan_single);
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}
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