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bcacheadm: list-cachesets --list-devs option

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lists the devices in each cacheset

Change-Id: Ie3beb38203eefc3ab64b2a3d37652964f7021e54
Signed-off-by: Jacob Malevich <jam@daterainc.com>
This commit is contained in:
Jacob Malevich 2014-11-13 17:08:20 -08:00
parent 7d34cf342e
commit 3fda6adc19
3 changed files with 50 additions and 5 deletions
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47
bcache.c
View File

@ -901,7 +901,43 @@ void print_dev_info(struct cache_sb *sb, bool force_csum)
show_super_backingdev(sb, force_csum);
}
int list_cachesets(char *cset_dir)
static void list_cacheset_devs(char *cset_dir, char *cset_name) {
int i = 0;
DIR *cachedir;
struct stat cache_stat;
char intbuf[4];
char entry[256];
strcpy(entry, cset_dir);
strcat(entry, "/");
strcat(entry, cset_name);
strcat(entry, "/cache0");
snprintf(intbuf, 4, "%d", i);
while(true) {
char buf[256];
int len;
if((cachedir = opendir(entry)) == NULL)
break;
if(stat(entry, &cache_stat))
break;
if((len = readlink(entry, buf, sizeof(buf) - 1)) != -1) {
buf[len] = '\0';
printf("\t%s\n", buf);
}
/* remove i from end and append i++ */
entry[strlen(entry)-strlen(intbuf)] = 0;
i++;
snprintf(intbuf, 4, "%d", i);
strcat(entry, intbuf);
}
}
int list_cachesets(char *cset_dir, bool list_devs)
{
struct dirent *ent;
DIR *dir = opendir(cset_dir);
@ -912,7 +948,8 @@ int list_cachesets(char *cset_dir)
while ((ent = readdir(dir)) != NULL) {
struct stat statbuf;
char entry[100];
char entry[256];
struct dirent *cache_ent;
if (!strcmp(ent->d_name, ".") || !strcmp(ent->d_name, ".."))
continue;
@ -920,12 +957,18 @@ int list_cachesets(char *cset_dir)
strcpy(entry, cset_dir);
strcat(entry, "/");
strcat(entry, ent->d_name);
if(stat(entry, &statbuf) == -1) {
fprintf(stderr, "Failed to stat %s\n", entry);
return 1;
}
if (S_ISDIR(statbuf.st_mode)) {
printf("%s\n", ent->d_name);
if(list_devs) {
list_cacheset_devs(cset_dir, ent->d_name);
}
}
}

2
bcache.h
View File

@ -58,7 +58,7 @@ void show_super_backingdev(struct cache_sb *, bool);
void show_super_cache(struct cache_sb *, bool);
struct cache_sb *query_dev(char *, bool);
int list_cachesets(char *);
int list_cachesets(char *, bool);
char *parse_array_to_list(char *const *);
int register_bcache();
int probe(char *, int);

6
bcacheadm.c
View File

@ -85,6 +85,7 @@ bool udev = false;
/* list globals */
char *cset_dir = "/sys/fs/bcache";
bool list_devs = false;
/* status globals */
bool status_all = false;
@ -203,6 +204,7 @@ 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},
NIH_OPTION_LAST
};
@ -352,7 +354,7 @@ int bcache_register (NihCommand *command, char *const *args)
int bcache_list_cachesets (NihCommand *command, char *const *args)
{
return list_cachesets(cset_dir);
return list_cachesets(cset_dir, list_devs);
}
int bcache_query_devs (NihCommand *command, char *const *args)
@ -361,7 +363,7 @@ int bcache_query_devs (NihCommand *command, char *const *args)
for (i = 0; args[i] != NULL; i++) {
printf("query-devs on :%s\n", args[i]);
printf("query-devs on: %s\n", args[i]);
struct cache_sb *sb = query_dev(args[i], false);
print_dev_info(sb, force_csum);
}