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bcacheadm: add "list-cachesets --internal_uuid UUID" option

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This shows the superblock set_uuid, given the user_uuid.

Signed-off-by: Jacob Malevich <jam@daterainc.com>

    Issue DAT-1913

Change-Id: If5f81427ac02bceeb609ae119f044de3fb5a0d77
This commit is contained in:
Jacob Malevich 2015-02-02 17:37:27 -08:00
parent 8c9ab06141
commit 3fa318e8b7
1 changed files with 27 additions and 4 deletions
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31
bcacheadm.c
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@ -79,6 +79,7 @@ bool udev = false;
/* list globals */
char *cset_dir = "/sys/fs/bcache";
bool list_devs = false;
static const char *internal_uuid = NULL;
/* status globals */
bool status_all = false;
@ -248,6 +249,7 @@ static NihOption query_devs_options[] = {
static NihOption list_cachesets_options[] = {
{'d', "dir", N_("directory"), NULL, NULL, &cset_dir, NULL},
{0, "list-devs", N_("list all devices in the cache sets as well"), NULL, NULL, &list_devs, NULL},
{0, "internal_uuid", N_("Show the internal UUID for the given cacheset UUID"), NULL, "UUID", &internal_uuid, NULL},
NIH_OPTION_LAST
};
@ -550,13 +552,34 @@ err:
int bcache_list_cachesets(NihCommand *command, char *const *args)
{
char *err = NULL;
err = list_cachesets(cset_dir, list_devs);
if (err) {
printf("bcache_list_cachesets error :%s\n", err);
return -1;
if (internal_uuid) {
char uuid_path[MAX_PATH];
DIR *uuid_dir;
char buf[MAX_PATH];
snprintf(uuid_path, MAX_PATH, "%s/%s", cset_dir, internal_uuid);
err = "uuid does not exist";
if((uuid_dir = opendir(uuid_path)) == NULL)
goto err;
err = read_stat_dir(uuid_dir, uuid_path, "/internal/internal_uuid", buf);
if (err)
goto err;
printf("%s", buf);
return 0;
}
err = list_cachesets(cset_dir, list_devs);
if (err)
goto err;
return 0;
err:
printf("bcache_list_cachesets error :%s\n", err);
return -1;
}
int bcache_query_devs(NihCommand *command, char *const *args)