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scsi: scsi_debug: fix write_same with virtual_gb problem

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The WRITE SAME(10) and (16) implementations didn't take account of the
buffer wrap required when the virtual_gb parameter is greater than 0.

Fix that and rename the fake_store() function to lba2fake_store() to lessen
confusion with the global fake_storep pointer. Bump version date.

Signed-off-by: Douglas Gilbert <dgilbert@interlog.com>
Reported-by: Bart Van Assche <bvanassche@acm.org>
Tested by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Douglas Gilbert 2019-01-25 12:46:09 -05:00 committed by Martin K. Petersen
parent 5d8fc4a9f0
commit 40d07b523c
1 changed files with 21 additions and 20 deletions
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41
drivers/scsi/scsi_debug.c
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@ -62,7 +62,7 @@
/* make sure inq_product_rev string corresponds to this version */
#define SDEBUG_VERSION "0188" /* format to fit INQUIRY revision field */
static const char *sdebug_version_date = "20180128";
static const char *sdebug_version_date = "20190125";
#define MY_NAME "scsi_debug"
@ -735,7 +735,7 @@ static inline bool scsi_debug_lbp(void)
(sdebug_lbpu || sdebug_lbpws || sdebug_lbpws10);
}
static void *fake_store(unsigned long long lba)
static void *lba2fake_store(unsigned long long lba)
{
lba = do_div(lba, sdebug_store_sectors);
@ -2514,8 +2514,8 @@ static int do_device_access(struct scsi_cmnd *scmd, u32 sg_skip, u64 lba,
return ret;
}
/* If fake_store(lba,num) compares equal to arr(num), then copy top half of
* arr into fake_store(lba,num) and return true. If comparison fails then
/* If lba2fake_store(lba,num) compares equal to arr(num), then copy top half of
* arr into lba2fake_store(lba,num) and return true. If comparison fails then
* return false. */
static bool comp_write_worker(u64 lba, u32 num, const u8 *arr)
{
@ -2643,7 +2643,7 @@ static int prot_verify_read(struct scsi_cmnd *SCpnt, sector_t start_sec,
if (sdt->app_tag == cpu_to_be16(0xffff))
continue;
ret = dif_verify(sdt, fake_store(sector), sector, ei_lba);
ret = dif_verify(sdt, lba2fake_store(sector), sector, ei_lba);
if (ret) {
dif_errors++;
return ret;
@ -3261,10 +3261,12 @@ err_out:
static int resp_write_same(struct scsi_cmnd *scp, u64 lba, u32 num,
u32 ei_lba, bool unmap, bool ndob)
{
int ret;
unsigned long iflags;
unsigned long long i;
int ret;
u64 lba_off;
u32 lb_size = sdebug_sector_size;
u64 block, lbaa;
u8 *fs1p;
ret = check_device_access_params(scp, lba, num);
if (ret)
@ -3276,31 +3278,30 @@ static int resp_write_same(struct scsi_cmnd *scp, u64 lba, u32 num,
unmap_region(lba, num);
goto out;
}
lba_off = lba * sdebug_sector_size;
lbaa = lba;
block = do_div(lbaa, sdebug_store_sectors);
/* if ndob then zero 1 logical block, else fetch 1 logical block */
fs1p = fake_storep + (block * lb_size);
if (ndob) {
memset(fake_storep + lba_off, 0, sdebug_sector_size);
memset(fs1p, 0, lb_size);
ret = 0;
} else
ret = fetch_to_dev_buffer(scp, fake_storep + lba_off,
sdebug_sector_size);
ret = fetch_to_dev_buffer(scp, fs1p, lb_size);
if (-1 == ret) {
write_unlock_irqrestore(&atomic_rw, iflags);
return DID_ERROR << 16;
} else if (sdebug_verbose && !ndob && (ret < sdebug_sector_size))
} else if (sdebug_verbose && !ndob && (ret < lb_size))
sdev_printk(KERN_INFO, scp->device,
"%s: %s: lb size=%u, IO sent=%d bytes\n",
my_name, "write same",
sdebug_sector_size, ret);
my_name, "write same", lb_size, ret);
/* Copy first sector to remaining blocks */
for (i = 1 ; i < num ; i++)
memcpy(fake_storep + ((lba + i) * sdebug_sector_size),
fake_storep + lba_off,
sdebug_sector_size);
for (i = 1 ; i < num ; i++) {
lbaa = lba + i;
block = do_div(lbaa, sdebug_store_sectors);
memmove(fake_storep + (block * lb_size), fs1p, lb_size);
}
if (scsi_debug_lbp())
map_region(lba, num);
out: