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vdo: remember configure VDO write policy in metadata

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Store write_policy in vdopool metadata.
In case it's not present 'auto' is selected.
This commit is contained in:
Zdenek Kabelac 2019-10-04 15:09:11 +02:00
parent 7ca9be034f
commit 862aa06e5e
1 changed files with 11 additions and 1 deletions
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12
lib/vdo/vdo.c
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@ -1,5 +1,5 @@
/*
* Copyright (C) 2018 Red Hat, Inc. All rights reserved.
* Copyright (C) 2018-2019 Red Hat, Inc. All rights reserved.
*
* This file is part of LVM2.
*
@ -189,6 +189,7 @@ static void _vdo_pool_display(const struct lv_segment *seg)
log_print(" # Logical threads\t%u", (unsigned) vtp->logical_threads);
log_print(" # Physical threads\t%u", (unsigned) vtp->physical_threads);
log_print(" Max discard\t%u", (unsigned) vtp->max_discard);
log_print(" Write policy\t%s", get_vdo_write_policy_name(vtp->write_policy));
}
/* reused as _vdo_text_import_area_count */
@ -280,6 +281,12 @@ static int _vdo_pool_text_import(struct lv_segment *seg,
if (!dm_config_get_uint32(n, "physical_threads", &vtp->physical_threads))
return _bad_field("physical_threads");
if (dm_config_has_node(n, "write_policy")) {
if (!(str = dm_config_find_str(n, "write_policy", NULL)) ||
!set_vdo_write_policy(&vtp->write_policy, str))
return _bad_field("write_policy");
} else
vtp->write_policy = DM_VDO_WRITE_POLICY_AUTO;
if (!set_lv_segment_area_lv(seg, 0, data_lv, 0, LV_VDO_POOL_DATA))
return_0;
@ -334,6 +341,9 @@ static int _vdo_pool_text_export(const struct lv_segment *seg, struct formatter
outf(f, "logical_threads = %u", (unsigned) vtp->logical_threads);
outf(f, "physical_threads = %u", (unsigned) vtp->physical_threads);
if (vtp->write_policy != DM_VDO_WRITE_POLICY_AUTO)
outf(f, "write_policy = %s", get_vdo_write_policy_name(vtp->write_policy));
return 1;
}