diff options
| author |   Roland Dreier <roland@purestorage.com> | 2012-02-13 16:18:17 -0800 |
|---|---|---|
| committer |   Nicholas Bellinger <nab@linux-iscsi.org> | 2012-02-25 14:37:49 -0800 |
| commit | 015487b89f27d91d95a056cdc3c85e6c729bff12 (patch) | |
| tree | 0cecb2acc903154e25abb23e8f345f301fcd1ef5 /drivers/target/target_core_internal.h | |
| parent | target: Don't set WBUS16 or SYNC bits in INQUIRY response (diff) | |
| download | linux-dev-015487b89f27d91d95a056cdc3c85e6c729bff12.tar.xz linux-dev-015487b89f27d91d95a056cdc3c85e6c729bff12.zip | |
target: Untangle front-end and back-end meanings of max_sectors attribute
se_dev_attrib.max_sectors currently has two independent meanings:
- It is reported in the block limits VPD page as the maximum transfer
length, ie the largest IO that the front-end (fabric) can handle.
Also the target core doesn't enforce this maximum transfer length.
- It is used to hold the size of the largest IO that the back-end can
handle, so we know when to split SCSI commands into multiple tasks.
Fix this by adding a new se_dev_attrib.fabric_max_sectors to hold the
maximum transfer length, and checking incoming IOs against that limit.
Signed-off-by: Roland Dreier <roland@purestorage.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'drivers/target/target_core_internal.h')
| -rw-r--r-- | drivers/target/target_core_internal.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/target/target_core_internal.h b/drivers/target/target_core_internal.h index b026dedb8184..21c05638f158 100644 --- a/drivers/target/target_core_internal.h +++ b/drivers/target/target_core_internal.h @@ -53,6 +53,7 @@ int se_dev_set_is_nonrot(struct se_device *, int); int se_dev_set_emulate_rest_reord(struct se_device *dev, int); int se_dev_set_queue_depth(struct se_device *, u32); int se_dev_set_max_sectors(struct se_device *, u32); +int se_dev_set_fabric_max_sectors(struct se_device *, u32); int se_dev_set_optimal_sectors(struct se_device *, u32); int se_dev_set_block_size(struct se_device *, u32); struct se_lun *core_dev_add_lun(struct se_portal_group *, struct se_hba *, |