mirror of
git://sourceware.org/git/lvm2.git
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116 lines
2.9 KiB
C
116 lines
2.9 KiB
C
/*
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* Copyright (C) 2014 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 "base/memory/zalloc.h"
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#include "lib/misc/lib.h"
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#include "lib/filters/filter.h"
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#include "lib/activate/activate.h"
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static const char _too_small_to_hold_pv_msg[] = "Too small to hold a PV";
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static int _check_pv_min_size(struct device *dev)
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{
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uint64_t size;
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int ret = 0;
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/* Check it's not too small */
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if (!dev_get_size(dev, &size)) {
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log_debug_devs("%s: Skipping: dev_get_size failed", dev_name(dev));
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goto out;
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}
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if (size < pv_min_size()) {
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log_debug_devs("%s: Skipping: %s", dev_name(dev),
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_too_small_to_hold_pv_msg);
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goto out;
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}
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ret = 1;
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out:
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return ret;
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}
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static int _passes_usable_filter(struct cmd_context *cmd, struct dev_filter *f, struct device *dev, const char *use_filter_name)
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{
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struct dev_usable_check_params *ucp = f->private;
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int is_lv = 0;
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int r = 1;
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dev->filtered_flags &= ~DEV_FILTERED_MINSIZE;
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dev->filtered_flags &= ~DEV_FILTERED_UNUSABLE;
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/* further checks are done on dm devices only */
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if (dm_is_dm_major(MAJOR(dev->dev))) {
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if (!(r = device_is_usable(cmd, dev, *ucp, &is_lv))) {
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if (is_lv)
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dev->filtered_flags |= DEV_FILTERED_IS_LV;
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else
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dev->filtered_flags |= DEV_FILTERED_UNUSABLE;
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log_debug_devs("%s: Skipping unusable device.", dev_name(dev));
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}
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}
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if (r) {
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r = _check_pv_min_size(dev);
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if (!r)
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dev->filtered_flags |= DEV_FILTERED_MINSIZE;
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}
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return r;
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}
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static void _usable_filter_destroy(struct dev_filter *f)
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{
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if (f->use_count)
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log_error(INTERNAL_ERROR "Destroying usable device filter while in use %u times.", f->use_count);
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free(f->private);
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free(f);
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}
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struct dev_filter *usable_filter_create(struct cmd_context *cmd, struct dev_types *dt __attribute__((unused)))
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{
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struct dev_usable_check_params *data;
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struct dev_filter *f;
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if (!(f = zalloc(sizeof(*f)))) {
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log_error("Usable device filter allocation failed");
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return NULL;
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}
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f->passes_filter = _passes_usable_filter;
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f->destroy = _usable_filter_destroy;
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f->use_count = 0;
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f->name = "usable";
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if (!(data = zalloc(sizeof(*data)))) {
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log_error("Usable device filter mode allocation failed");
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free(f);
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return NULL;
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}
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data->check_empty = 1;
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data->check_blocked = 1;
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data->check_suspended = ignore_suspended_devices();
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data->check_error_target = 1;
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data->check_reserved = 1;
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data->check_lv = !find_config_tree_bool(cmd, devices_scan_lvs_CFG, NULL);
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f->private = data;
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log_debug_devs("Usable device filter initialised (scan_lvs %d).", !data->check_lv);
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return f;
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}
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