| Message ID | 20200218172840.4097-2-chaitanya.kulkarni@wdc.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | null_blk: add tracnepoints for zoned mode | expand |
On 2020/02/19 2:29, Chaitanya Kulkarni wrote: > Add a helper to stringify the zone conditions. We use this helper in the > next patch to track zone conditions in tracepoints. > > Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> > --- > Changes from V1 : - > > 1. Move blk_zone_cond_str() to blk-zoned.c. > 2. Mark zone_cond_namd array static. > 3. Remove BLK_ZONE_COND_LAST. > 4. Get rid of inline prefix for blk_zone_cond_str(). > --- > block/blk-zoned.c | 32 ++++++++++++++++++++++++++++++++ > include/linux/blkdev.h | 10 ++++++++++ > 2 files changed, 42 insertions(+) > > 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) > { > diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h > index 053ea4b51988..a40a3a27bfbc 100644 > --- a/include/linux/blkdev.h > +++ b/include/linux/blkdev.h > @@ -887,6 +887,16 @@ extern void blk_execute_rq_nowait(struct request_queue *, struct gendisk *, > /* Helper to convert REQ_OP_XXX to its string format XXX */ > extern const char *blk_op_str(unsigned int op); > > +#ifdef CONFIG_BLK_DEV_ZONED > +/* Helper to convert BLK_ZONE_ZONE_XXX to its string format XXX */ > +extern const char *blk_zone_cond_str(enum blk_zone_cond zone_cond); > +#else > +static const char *blk_zone_cond_str(unsigned int zone_cond) > +{ > + return "NOT SUPPORTED"; > +} why not inline ? That compiles ? Please check builds with CONFIG_BLK_DEV_ZONED disabled. > +#endif /* CONFIG_BLK_DEV_ZONED */ > + > int blk_status_to_errno(blk_status_t status); > blk_status_t errno_to_blk_status(int errno); > >
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) { diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 053ea4b51988..a40a3a27bfbc 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -887,6 +887,16 @@ extern void blk_execute_rq_nowait(struct request_queue *, struct gendisk *, /* Helper to convert REQ_OP_XXX to its string format XXX */ extern const char *blk_op_str(unsigned int op); +#ifdef CONFIG_BLK_DEV_ZONED +/* Helper to convert BLK_ZONE_ZONE_XXX to its string format XXX */ +extern const char *blk_zone_cond_str(enum blk_zone_cond zone_cond); +#else +static const char *blk_zone_cond_str(unsigned int zone_cond) +{ + return "NOT SUPPORTED"; +} +#endif /* CONFIG_BLK_DEV_ZONED */ + int blk_status_to_errno(blk_status_t status); blk_status_t errno_to_blk_status(int errno);
Add a helper to stringify the zone conditions. We use this helper in the next patch to track zone conditions in tracepoints. Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> --- Changes from V1 : - 1. Move blk_zone_cond_str() to blk-zoned.c. 2. Mark zone_cond_namd array static. 3. Remove BLK_ZONE_COND_LAST. 4. Get rid of inline prefix for blk_zone_cond_str(). --- block/blk-zoned.c | 32 ++++++++++++++++++++++++++++++++ include/linux/blkdev.h | 10 ++++++++++ 2 files changed, 42 insertions(+)