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| author | Coly Li <colyli@suse.de> | 2019-02-09 05:53:03 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2019-02-09 15:18:32 +0100 |
| commit | f5c0b95d2eeb17cf8a81fde0461938d2a79303ab (patch) | |
| tree | cf2f81a6742a8f499dfac0e72f139597dda233a2 /drivers/md | |
| parent | bcache: add sysfs_strtoul_bool() for setting bit-field variables (diff) | |
| download | linux-f5c0b95d2eeb17cf8a81fde0461938d2a79303ab.tar.xz linux-f5c0b95d2eeb17cf8a81fde0461938d2a79303ab.zip | |
bcache: use sysfs_strtoul_bool() to set bit-field variables
When setting bcache parameters via sysfs, there are some variables are
defined as bit-field value. Current bcache code in sysfs.c uses either
d_strtoul() or sysfs_strtoul() to convert the input string to unsigned
integer value and set it to the corresponded bit-field value.
The problem is, the bit-field value only takes the lowest bit of the
converted value. If input is 2, the expected value (like bool value)
of the bit-field value should be 1, but indeed it is 0.
The following sysfs files for bit-field variables have such problem,
bypass_torture_test, for dc->bypass_torture_test
writeback_metadata, for dc->writeback_metadata
writeback_running, for dc->writeback_running
verify, for c->verify
key_merging_disabled, for c->key_merging_disabled
gc_always_rewrite, for c->gc_always_rewrite
btree_shrinker_disabled,for c->shrinker_disabled
copy_gc_enabled, for c->copy_gc_enabled
This patch uses sysfs_strtoul_bool() to set such bit-field variables,
then if the converted value is non-zero, the bit-field variables will
be set to 1, like setting a bool value like expensive_debug_checks.
Signed-off-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/bcache/sysfs.c | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/drivers/md/bcache/sysfs.c b/drivers/md/bcache/sysfs.c index 96b64893f2cb..57395e23747a 100644 --- a/drivers/md/bcache/sysfs.c +++ b/drivers/md/bcache/sysfs.c @@ -277,9 +277,9 @@ STORE(__cached_dev) sysfs_strtoul(data_csum, dc->disk.data_csum); d_strtoul(verify); - d_strtoul(bypass_torture_test); - d_strtoul(writeback_metadata); - d_strtoul(writeback_running); + sysfs_strtoul_bool(bypass_torture_test, dc->bypass_torture_test); + sysfs_strtoul_bool(writeback_metadata, dc->writeback_metadata); + sysfs_strtoul_bool(writeback_running, dc->writeback_running); d_strtoul(writeback_delay); sysfs_strtoul_clamp(writeback_percent, dc->writeback_percent, @@ -816,12 +816,12 @@ STORE(__bch_cache_set) } sysfs_strtoul(journal_delay_ms, c->journal_delay_ms); - sysfs_strtoul(verify, c->verify); - sysfs_strtoul(key_merging_disabled, c->key_merging_disabled); + sysfs_strtoul_bool(verify, c->verify); + sysfs_strtoul_bool(key_merging_disabled, c->key_merging_disabled); sysfs_strtoul(expensive_debug_checks, c->expensive_debug_checks); - sysfs_strtoul(gc_always_rewrite, c->gc_always_rewrite); - sysfs_strtoul(btree_shrinker_disabled, c->shrinker_disabled); - sysfs_strtoul(copy_gc_enabled, c->copy_gc_enabled); + sysfs_strtoul_bool(gc_always_rewrite, c->gc_always_rewrite); + sysfs_strtoul_bool(btree_shrinker_disabled, c->shrinker_disabled); + sysfs_strtoul_bool(copy_gc_enabled, c->copy_gc_enabled); /* * write gc_after_writeback here may overwrite an already set * BCH_DO_AUTO_GC, it doesn't matter because this flag will be |