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bcache: Replace bch_read_string_list() by __sysfs_match_string()

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Kernel library has a common function to match user input from sysfs
against an array of strings. Thus, replace bch_read_string_list() by
__sysfs_match_string().

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Andy Shevchenko 2018-05-28 15:37:44 +08:00 committed by Jens Axboe
parent ecb37ce9ba
commit ce4c3e19e5
1 changed files with 9 additions and 35 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

44
drivers/md/bcache/sysfs.c
View file

@ -18,7 +18,6 @@
/* Default is -1; we skip past it for struct cached_dev's cache mode */
static const char * const bch_cache_modes[] = {
"default",
"writethrough",
"writeback",
"writearound",
@ -28,7 +27,6 @@ static const char * const bch_cache_modes[] = {
/* Default is -1; we skip past it for stop_when_cache_set_failed */
static const char * const bch_stop_on_failure_modes[] = {
"default",
"auto",
"always",
NULL
@ -146,27 +144,6 @@ static ssize_t bch_snprint_string_list(char *buf, size_t size, const char * cons
return out - buf;
}
static ssize_t bch_read_string_list(const char *buf, const char * const list[])
{
size_t i;
char *s, *d = kstrndup(buf, PAGE_SIZE - 1, GFP_KERNEL);
if (!d)
return -ENOMEM;
s = strim(d);
for (i = 0; list[i]; i++)
if (!strcmp(list[i], s))
break;
kfree(d);
if (!list[i])
return -EINVAL;
return i;
}
SHOW(__bch_cached_dev)
{
struct cached_dev *dc = container_of(kobj, struct cached_dev,
@ -177,12 +154,12 @@ SHOW(__bch_cached_dev)
if (attr == &sysfs_cache_mode)
return bch_snprint_string_list(buf, PAGE_SIZE,
bch_cache_modes + 1,
bch_cache_modes,
BDEV_CACHE_MODE(&dc->sb));
if (attr == &sysfs_stop_when_cache_set_failed)
return bch_snprint_string_list(buf, PAGE_SIZE,
bch_stop_on_failure_modes + 1,
bch_stop_on_failure_modes,
dc->stop_when_cache_set_failed);
@ -306,8 +283,7 @@ STORE(__cached_dev)
bch_cached_dev_run(dc);
if (attr == &sysfs_cache_mode) {
v = bch_read_string_list(buf, bch_cache_modes + 1);
v = __sysfs_match_string(bch_cache_modes, -1, buf);
if (v < 0)
return v;
@ -318,8 +294,7 @@ STORE(__cached_dev)
}
if (attr == &sysfs_stop_when_cache_set_failed) {
v = bch_read_string_list(buf, bch_stop_on_failure_modes + 1);
v = __sysfs_match_string(bch_stop_on_failure_modes, -1, buf);
if (v < 0)
return v;
@ -688,6 +663,7 @@ SHOW_LOCKED(bch_cache_set)
STORE(__bch_cache_set)
{
struct cache_set *c = container_of(kobj, struct cache_set, kobj);
ssize_t v;
if (attr == &sysfs_unregister)
bch_cache_set_unregister(c);
@ -751,8 +727,7 @@ STORE(__bch_cache_set)
c->congested_write_threshold_us);
if (attr == &sysfs_errors) {
ssize_t v = bch_read_string_list(buf, error_actions);
v = __sysfs_match_string(error_actions, -1, buf);
if (v < 0)
return v;
@ -767,8 +742,7 @@ STORE(__bch_cache_set)
c->error_decay = strtoul_or_return(buf) / 88;
if (attr == &sysfs_io_disable) {
int v = strtoul_or_return(buf);
v = strtoul_or_return(buf);
if (v) {
if (test_and_set_bit(CACHE_SET_IO_DISABLE,
&c->flags))
@ -982,6 +956,7 @@ SHOW_LOCKED(bch_cache)
STORE(__bch_cache)
{
struct cache *ca = container_of(kobj, struct cache, kobj);
ssize_t v;
if (attr == &sysfs_discard) {
bool v = strtoul_or_return(buf);
@ -996,8 +971,7 @@ STORE(__bch_cache)
}
if (attr == &sysfs_cache_replacement_policy) {
ssize_t v = bch_read_string_list(buf, cache_replacement_policies);
v = __sysfs_match_string(cache_replacement_policies, -1, buf);
if (v < 0)
return v;