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scsi: sd_zbc: Rename sd_zbc_check_zones() 

Now that the block layer implement zone checks on revalidate,
sd_zbc_check_zones() is reduced getting the zone size and verifying the
device capacity for device with RC_BASIS=0. Be clear about this by renaming
sd_zbc_check_zones() to sd_zbc_check_capacity() and updating the function
description and comments.

Link: https://lore.kernel.org/r/20191220075823.400072-3-damien.lemoal@wdc.com
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Damien Le Moal 2019-12-20 16:58:23 +09:00 committed by Martin K. Petersen
parent 19aaa40723
commit dbfc5626d9
1 changed files with 13 additions and 14 deletions
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25
drivers/scsi/sd_zbc.c
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@ -325,19 +325,21 @@ static int sd_zbc_check_zoned_characteristics(struct scsi_disk *sdkp,
}
/**
* sd_zbc_check_zones - Check the device capacity and zone size
* sd_zbc_check_capacity - Check the device capacity
* @sdkp: Target disk
* @buf: command buffer
* @zblock: zone size in number of blocks
*
* Check that the device capacity as reported by READ CAPACITY matches the
* max_lba value (plus one)of the report zones command reply.
* Get the device zone size and check that the device capacity as reported
* by READ CAPACITY matches the max_lba value (plus one) of the report zones
* command reply for devices with RC_BASIS == 0.
*
* Returns the zone size in number of blocks upon success or an error code
* upon failure.
* Returns 0 upon success or an error code upon failure.
*/
static int sd_zbc_check_zones(struct scsi_disk *sdkp, unsigned char *buf,
static int sd_zbc_check_capacity(struct scsi_disk *sdkp, unsigned char *buf,
u32 *zblocks)
{
u64 zone_blocks = 0;
u64 zone_blocks;
sector_t max_lba;
unsigned char *rec;
int ret;
@ -360,7 +362,7 @@ static int sd_zbc_check_zones(struct scsi_disk *sdkp, unsigned char *buf,
}
}
/* Parse REPORT ZONES header */
/* Get the size of the first reported zone */
rec = buf + 64;
zone_blocks = get_unaligned_be64(&rec[8]);
if (logical_to_sectors(sdkp->device, zone_blocks) > UINT_MAX) {
@ -394,11 +396,8 @@ int sd_zbc_read_zones(struct scsi_disk *sdkp, unsigned char *buf)
if (ret)
goto err;
/*
* Check zone size: only devices with a constant zone size (except
* an eventual last runt zone) that is a power of 2 are supported.
*/
ret = sd_zbc_check_zones(sdkp, buf, &zone_blocks);
/* Check the device capacity reported by report zones */
ret = sd_zbc_check_capacity(sdkp, buf, &zone_blocks);
if (ret != 0)
goto err;