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author | Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> | 2019-08-22 21:45:18 -0700 |
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committer | Jens Axboe <axboe@kernel.dk> | 2019-08-23 06:58:05 -0600 |
commit | fceb5d1b19cbe6263f09dbe8e8138edf02eb6e6b (patch) | |
tree | a9ac7e571d1e33efcce191de63ed75e1dafebf25 /drivers/block | |
parent | 7ea88e229e9df18ecd624b0d39f3dba87432ba33 (diff) | |
download | linux-fceb5d1b19cbe6263f09dbe8e8138edf02eb6e6b.tar.gz linux-fceb5d1b19cbe6263f09dbe8e8138edf02eb6e6b.tar.bz2 linux-fceb5d1b19cbe6263f09dbe8e8138edf02eb6e6b.zip |
null_blk: create a helper for zoned devices
This patch creates a helper function for handling zoned block device
operations.
This patch also restructured the code for null_blk_zoned.c and uses the
pattern to return blk_status_t and catch the error in the function
null_handle_cmd() into cmd->error variable instead of setting it up in
the deeper layer just like the way it is done for flush, badblocks and
memory backed case in the null_handle_cmd(). We also move
null_handle_zoned() to the null_blk_zoned.c to keep the zoned code
separate.
Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/block')
-rw-r--r-- | drivers/block/null_blk.h | 13 | ||||
-rw-r--r-- | drivers/block/null_blk_main.c | 11 | ||||
-rw-r--r-- | drivers/block/null_blk_zoned.c | 38 |
3 files changed, 35 insertions, 27 deletions
diff --git a/drivers/block/null_blk.h b/drivers/block/null_blk.h index a1b9929bd911..4895c02e0c65 100644 --- a/drivers/block/null_blk.h +++ b/drivers/block/null_blk.h @@ -90,9 +90,9 @@ int null_zone_init(struct nullb_device *dev); void null_zone_exit(struct nullb_device *dev); int null_zone_report(struct gendisk *disk, sector_t sector, struct blk_zone *zones, unsigned int *nr_zones); -void null_zone_write(struct nullb_cmd *cmd, sector_t sector, - unsigned int nr_sectors); -void null_zone_reset(struct nullb_cmd *cmd, sector_t sector); +inline blk_status_t null_handle_zoned(struct nullb_cmd *cmd, + enum req_opf op, sector_t sector, + sector_t nr_sectors); #else static inline int null_zone_init(struct nullb_device *dev) { @@ -106,10 +106,11 @@ static inline int null_zone_report(struct gendisk *disk, sector_t sector, { return -EOPNOTSUPP; } -static inline void null_zone_write(struct nullb_cmd *cmd, sector_t sector, - unsigned int nr_sectors) +static inline blk_status_t null_handle_zoned(struct nullb_cmd *cmd, + enum req_opf op, sector_t sector, + sector_t nr_sectors) { + return BLK_STS_NOTSUPP; } -static inline void null_zone_reset(struct nullb_cmd *cmd, sector_t sector) {} #endif /* CONFIG_BLK_DEV_ZONED */ #endif /* __NULL_BLK_H */ diff --git a/drivers/block/null_blk_main.c b/drivers/block/null_blk_main.c index 4299274cccfb..bf40c3115bb9 100644 --- a/drivers/block/null_blk_main.c +++ b/drivers/block/null_blk_main.c @@ -1209,14 +1209,9 @@ static blk_status_t null_handle_cmd(struct nullb_cmd *cmd, sector_t sector, if (dev->memory_backed) cmd->error = null_handle_memory_backed(cmd, op); - if (!cmd->error && dev->zoned) { - if (op == REQ_OP_WRITE) - null_zone_write(cmd, sector, nr_sectors); - else if (op == REQ_OP_ZONE_RESET) - null_zone_reset(cmd, sector); - else if (op == REQ_OP_ZONE_RESET_ALL) - null_zone_reset(cmd, 0); - } + if (!cmd->error && dev->zoned) + cmd->error = null_handle_zoned(cmd, op, sector, nr_sectors); + out: /* Complete IO by inline, softirq or timer */ switch (dev->irqmode) { diff --git a/drivers/block/null_blk_zoned.c b/drivers/block/null_blk_zoned.c index 8c7f5bf81975..90092247e7eb 100644 --- a/drivers/block/null_blk_zoned.c +++ b/drivers/block/null_blk_zoned.c @@ -84,7 +84,7 @@ int null_zone_report(struct gendisk *disk, sector_t sector, return 0; } -void null_zone_write(struct nullb_cmd *cmd, sector_t sector, +static blk_status_t null_zone_write(struct nullb_cmd *cmd, sector_t sector, unsigned int nr_sectors) { struct nullb_device *dev = cmd->nq->dev; @@ -95,14 +95,12 @@ void null_zone_write(struct nullb_cmd *cmd, sector_t sector, case BLK_ZONE_COND_FULL: /* Cannot write to a full zone */ cmd->error = BLK_STS_IOERR; - break; + return BLK_STS_IOERR; case BLK_ZONE_COND_EMPTY: case BLK_ZONE_COND_IMP_OPEN: /* Writes must be at the write pointer position */ - if (sector != zone->wp) { - cmd->error = BLK_STS_IOERR; - break; - } + if (sector != zone->wp) + return BLK_STS_IOERR; if (zone->cond == BLK_ZONE_COND_EMPTY) zone->cond = BLK_ZONE_COND_IMP_OPEN; @@ -115,12 +113,12 @@ void null_zone_write(struct nullb_cmd *cmd, sector_t sector, break; default: /* Invalid zone condition */ - cmd->error = BLK_STS_IOERR; - break; + return BLK_STS_IOERR; } + return BLK_STS_OK; } -void null_zone_reset(struct nullb_cmd *cmd, sector_t sector) +static blk_status_t null_zone_reset(struct nullb_cmd *cmd, sector_t sector) { struct nullb_device *dev = cmd->nq->dev; unsigned int zno = null_zone_no(dev, sector); @@ -137,10 +135,8 @@ void null_zone_reset(struct nullb_cmd *cmd, sector_t sector) } break; case REQ_OP_ZONE_RESET: - if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL) { - cmd->error = BLK_STS_IOERR; - return; - } + if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL) + return BLK_STS_IOERR; zone->cond = BLK_ZONE_COND_EMPTY; zone->wp = zone->start; @@ -149,4 +145,20 @@ void null_zone_reset(struct nullb_cmd *cmd, sector_t sector) cmd->error = BLK_STS_NOTSUPP; break; } + return BLK_STS_OK; +} + +inline blk_status_t null_handle_zoned(struct nullb_cmd *cmd, + enum req_opf op, sector_t sector, + sector_t nr_sectors) +{ + switch (op) { + case REQ_OP_WRITE: + return null_zone_write(cmd, sector, nr_sectors); + case REQ_OP_ZONE_RESET: + case REQ_OP_ZONE_RESET_ALL: + return null_zone_reset(cmd, sector); + default: + return BLK_STS_OK; + } } |