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cache: factor lvchange_cache

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to prepare for future addition
This commit is contained in:
David Teigland 2018-11-05 16:38:08 -06:00
parent e548e7c29d
commit 8c9d9a7446
1 changed files with 14 additions and 6 deletions
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20
tools/lvchange.c
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@ -636,18 +636,26 @@ static int _lvchange_cache(struct cmd_context *cmd,
cache_mode_t mode;
const char *name;
struct dm_config_tree *settings = NULL;
struct lv_segment *pool_seg = first_seg(lv);
struct lv_segment *seg;
struct lv_segment *setting_seg = NULL;
int r = 0, is_clean;
uint32_t chunk_size = 0; /* FYI: lvchange does NOT support its change */
if (lv_is_cache(lv))
pool_seg = first_seg(pool_seg->pool_lv);
seg = first_seg(lv);
if (seg_is_cache_pool(seg))
setting_seg = seg;
else if (seg_is_cache(seg))
setting_seg = first_seg(seg->pool_lv);
else
goto_out;
if (!get_cache_params(cmd, &chunk_size, &format, &mode, &name, &settings))
goto_out;
if ((mode != CACHE_MODE_UNSELECTED) &&
(mode != pool_seg->cache_mode) &&
(mode != setting_seg->cache_mode) &&
lv_is_cache(lv)) {
if (!lv_cache_wait_for_clean(lv, &is_clean))
return_0;
@ -658,11 +666,11 @@ static int _lvchange_cache(struct cmd_context *cmd,
}
}
if (mode && !cache_set_cache_mode(first_seg(lv), mode))
if (mode && !cache_set_cache_mode(seg, mode))
goto_out;
if ((name || settings) &&
!cache_set_policy(first_seg(lv), name, settings))
!cache_set_policy(seg, name, settings))
goto_out;
/* Request caller to commit and reload metadata */