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| author | Coly Li <colyli@suse.de> | 2020-07-25 20:00:36 +0800 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2020-07-25 07:38:21 -0600 |
| commit | 092bd54d69230b4a4a7f640a4cdcdeb004d3546e (patch) | |
| tree | 9bd4a363c21ace95a6613db3eaf45cd390a62924 /drivers/md/bcache/sysfs.c | |
| parent | ffa470327572b8f85dceda48fd0676d9658cb8c5 (diff) | |
| download | linux-stable-092bd54d69230b4a4a7f640a4cdcdeb004d3546e.tar.gz linux-stable-092bd54d69230b4a4a7f640a4cdcdeb004d3546e.tar.bz2 linux-stable-092bd54d69230b4a4a7f640a4cdcdeb004d3546e.zip | |
bcache: add sysfs file to display feature sets information of cache set
The following three sysfs files are created to display according feature
set information of bcache:
/sys/fs/bcache/<cache set UUID>/internal/feature_compat
/sys/fs/bcache/<cache set UUID>/internal/feature_ro_compat
/sys/fs/bcache/<cache set UUID>/internal/feature_incompat
is added by this patch, to display feature sets information of the cache
set.
Now only an incompat feature 'large_bucket' added in bcache, the sysfs
file content is:
[large_bucket]
string large_bucket means the running bcache drive supports incompat
feature 'large_bucket', the wrapping [] means the 'large_bucket' feature
is currently enabled on this cache set.
This patch is ready to display compat and ro_compat features, in future
once bcache code implements such feature sets, the according feature
strings will be displayed in their sysfs files too.
Signed-off-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/md/bcache/sysfs.c')
| -rw-r--r-- | drivers/md/bcache/sysfs.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/md/bcache/sysfs.c b/drivers/md/bcache/sysfs.c index 0dadec5a78f6..ac06c0bc3c0a 100644 --- a/drivers/md/bcache/sysfs.c +++ b/drivers/md/bcache/sysfs.c @@ -11,6 +11,7 @@ #include "btree.h" #include "request.h" #include "writeback.h" +#include "features.h" #include <linux/blkdev.h> #include <linux/sort.h> @@ -88,6 +89,9 @@ read_attribute(btree_used_percent); read_attribute(average_key_size); read_attribute(dirty_data); read_attribute(bset_tree_stats); +read_attribute(feature_compat); +read_attribute(feature_ro_compat); +read_attribute(feature_incompat); read_attribute(state); read_attribute(cache_read_races); @@ -779,6 +783,13 @@ SHOW(__bch_cache_set) if (attr == &sysfs_bset_tree_stats) return bch_bset_print_stats(c, buf); + if (attr == &sysfs_feature_compat) + return bch_print_cache_set_feature_compat(c, buf, PAGE_SIZE); + if (attr == &sysfs_feature_ro_compat) + return bch_print_cache_set_feature_ro_compat(c, buf, PAGE_SIZE); + if (attr == &sysfs_feature_incompat) + return bch_print_cache_set_feature_incompat(c, buf, PAGE_SIZE); + return 0; } SHOW_LOCKED(bch_cache_set) @@ -987,6 +998,9 @@ static struct attribute *bch_cache_set_internal_files[] = { &sysfs_io_disable, &sysfs_cutoff_writeback, &sysfs_cutoff_writeback_sync, + &sysfs_feature_compat, + &sysfs_feature_ro_compat, + &sysfs_feature_incompat, NULL }; KTYPE(bch_cache_set_internal); |