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config: use timestamp with nanosecond precision

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Since kernel 2.6 we can use more precise timestamping,
so e.g. we could better recognize configs are slightly
older then generated .cache file.
This commit is contained in:
Zdenek Kabelac
2015-03-18 10:59:41 +01:00
parent 6606b1bff3
commit 1260b86b2b
5 changed files with 25 additions and 15 deletions
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14
lib/commands/toolcontext.c
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@@ -1140,6 +1140,7 @@ static int _init_filters(struct cmd_context *cmd, unsigned load_persistent_cache
struct dev_filter *filter = NULL, *filter_components[2] = {0};
struct stat st;
const struct dm_config_node *cn;
struct timespec ts, cts;
cmd->dump_filter = 0;
@@ -1212,11 +1213,14 @@ static int _init_filters(struct cmd_context *cmd, unsigned load_persistent_cache
*/
if (!find_config_tree_bool(cmd, global_use_lvmetad_CFG, NULL) &&
load_persistent_cache && !cmd->is_long_lived &&
!stat(dev_cache, &st) &&
(st.st_ctime > config_file_timestamp(cmd->cft)) &&
!persistent_filter_load(cmd->filter, NULL))
log_verbose("Failed to load existing device cache from %s",
dev_cache);
!stat(dev_cache, &st)) {
lvm_stat_ctim(&ts, &st);
cts = config_file_timestamp(cmd->cft);
if (timespeccmp(&ts, &cts, >) &&
!persistent_filter_load(cmd->filter, NULL))
log_verbose("Failed to load existing device cache from %s",
dev_cache);
}
return 1;
bad: