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scsi: factor out read/write LBA range check

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The SCSI read and write functions use the same LBA range check, so move
it up to spdk_bdev_scsi_readwrite().

spdk_bdev_scsi_read() previously passed task->transfer_len / blen rather
than xfer_len to the LBA range checking function, but this should
actually be using the transfer length field from the CDB (which is the
xfer_len parameter).

Change-Id: I8285abf936a18a0baf7cc25709945637e4e6b87d
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
This commit is contained in:
Daniel Verkamp 2017-05-15 11:18:33 -07:00
parent 103351befd
commit de5ffac4ec
1 changed files with 6 additions and 17 deletions
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23
lib/scsi/scsi_bdev.c
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@ -1295,21 +1295,12 @@ spdk_bdev_scsi_read(struct spdk_bdev *bdev,
struct spdk_scsi_task *task, uint64_t lba,
uint32_t len)
{
uint64_t bdev_num_blocks;
uint64_t blen;
uint64_t offset;
uint64_t nbytes;
int rc;
bdev_num_blocks = spdk_bdev_get_num_blocks(bdev);
blen = spdk_bdev_get_block_size(bdev);
rc = spdk_bdev_scsi_read_write_lba_check(task->parent, task, lba,
task->transfer_len / blen, bdev_num_blocks);
if (rc < 0) {
return SPDK_SCSI_TASK_COMPLETE;
}
lba += (task->offset / blen);
offset = lba * blen;
nbytes = task->length;
@ -1340,11 +1331,9 @@ static int
spdk_bdev_scsi_write(struct spdk_bdev *bdev,
struct spdk_scsi_task *task, uint64_t lba, uint32_t len)
{
uint64_t bdev_num_blocks;
uint64_t blen;
uint64_t offset;
uint64_t nbytes;
int rc;
struct spdk_scsi_task *primary = task->parent;
if (len == 0) {
@ -1356,12 +1345,6 @@ spdk_bdev_scsi_write(struct spdk_bdev *bdev,
return SPDK_SCSI_TASK_COMPLETE;
}
bdev_num_blocks = spdk_bdev_get_num_blocks(bdev);
rc = spdk_bdev_scsi_read_write_lba_check(primary, task, lba, len, bdev_num_blocks);
if (rc < 0) {
return SPDK_SCSI_TASK_COMPLETE;
}
blen = spdk_bdev_get_block_size(bdev);
offset = lba * blen;
nbytes = ((uint64_t)len) * blen;
@ -1467,6 +1450,12 @@ spdk_bdev_scsi_readwrite(struct spdk_bdev *bdev,
return SPDK_SCSI_TASK_COMPLETE;
}
if (spdk_bdev_scsi_read_write_lba_check(task->parent, task, lba,
xfer_len, spdk_bdev_get_num_blocks(bdev)) < 0) {
/* spdk_bdev_scsi_read_write_lba_check() already set the correct sense code */
return SPDK_SCSI_TASK_COMPLETE;
}
if (is_read) {
return spdk_bdev_scsi_read(bdev, task, lba, xfer_len);
} else {