diff options
| author | Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> | 2020-03-25 10:49:54 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2020-03-27 13:39:09 -0600 |
| commit | 02694e86356dcf72d39329e52630234ad687e206 (patch) | |
| tree | fa4d87c8a233e5a9fa6635b5aa450d79135612e0 /block/blk-zoned.c | |
| parent | 01bb12fce73720f56eefd513bc07a2354a09b31f (diff) | |
| download | lwn-02694e86356dcf72d39329e52630234ad687e206.tar.gz lwn-02694e86356dcf72d39329e52630234ad687e206.zip | |
block: add a zone condition debug helper
Add a helper to stringify the zone conditions. We use this helper in the
next patch to track zone conditions in tracepoints.
Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-zoned.c')
| -rw-r--r-- | block/blk-zoned.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/block/blk-zoned.c b/block/blk-zoned.c index 05741c6f618b..f18f1ee9d71f 100644 --- a/block/blk-zoned.c +++ b/block/blk-zoned.c @@ -20,6 +20,38 @@ #include "blk.h" +#define ZONE_COND_NAME(name) [BLK_ZONE_COND_##name] = #name +static const char *const zone_cond_name[] = { + ZONE_COND_NAME(NOT_WP), + ZONE_COND_NAME(EMPTY), + ZONE_COND_NAME(IMP_OPEN), + ZONE_COND_NAME(EXP_OPEN), + ZONE_COND_NAME(CLOSED), + ZONE_COND_NAME(READONLY), + ZONE_COND_NAME(FULL), + ZONE_COND_NAME(OFFLINE), +}; +#undef ZONE_COND_NAME + +/** + * blk_zone_cond_str - Return string XXX in BLK_ZONE_COND_XXX. + * @zone_cond: BLK_ZONE_COND_XXX. + * + * Description: Centralize block layer function to convert BLK_ZONE_COND_XXX + * into string format. Useful in the debugging and tracing zone conditions. For + * invalid BLK_ZONE_COND_XXX it returns string "UNKNOWN". + */ +const char *blk_zone_cond_str(enum blk_zone_cond zone_cond) +{ + static const char *zone_cond_str = "UNKNOWN"; + + if (zone_cond < ARRAY_SIZE(zone_cond_name) && zone_cond_name[zone_cond]) + zone_cond_str = zone_cond_name[zone_cond]; + + return zone_cond_str; +} +EXPORT_SYMBOL_GPL(blk_zone_cond_str); + static inline sector_t blk_zone_start(struct request_queue *q, sector_t sector) { |