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| author | Nicholas Bellinger <nab@linux-iscsi.org> | 2012-11-15 11:02:49 -0800 |
|---|---|---|
| committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2012-11-15 12:27:21 -0800 |
| commit | 773cbaf7460aa58c67d4dca83c3f8bca10323bbe (patch) | |
| tree | 91e6015ade8d62c34c64861f1f3810b3c15a6a25 /drivers/target/target_core_internal.h | |
| parent | cd063bef414c51d79b9c6ea7a8ef8f9d319529bc (diff) | |
| download | lwn-773cbaf7460aa58c67d4dca83c3f8bca10323bbe.tar.gz lwn-773cbaf7460aa58c67d4dca83c3f8bca10323bbe.zip | |
target: Add/check max_write_same_len device attribute + update block limits VPD
This patch adds a new max_write_same_len device attribute for use with
WRITE_SAME w/ UNMAP=0 backend emulation. This can be useful for
lowering the default backend value (IBLOCK uses 0xFFFF).
Also, update block limits VPD emulation code in spc_emulate_evpd_b0() to
report MAXIMUM WRITE SAME LENGTH, and enforce max_write_same_len during
sbc_parse() -> sbc_setup_write_same() CDB sanity checking for all emulated
WRITE_SAME w/ UNMAP=0 cases.
(Robert: Move max_write_same_len check in sbc_setup_write_same() to
check both WRITE_SAME w/ UNMAP=1 and w/ UNMAP=0 cases)
Cc: Christoph Hellwig <hch@lst.de>
Cc: Martin K. Petersen <martin.petersen@oracle.com>
Cc: Robert Elliott <Elliott@hp.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 bc9c52284845..93e9c1f580b0 100644 --- a/drivers/target/target_core_internal.h +++ b/drivers/target/target_core_internal.h @@ -24,6 +24,7 @@ int se_dev_set_max_unmap_lba_count(struct se_device *, u32); int se_dev_set_max_unmap_block_desc_count(struct se_device *, u32); int se_dev_set_unmap_granularity(struct se_device *, u32); int se_dev_set_unmap_granularity_alignment(struct se_device *, u32); +int se_dev_set_max_write_same_len(struct se_device *, u32); int se_dev_set_emulate_dpo(struct se_device *, int); int se_dev_set_emulate_fua_write(struct se_device *, int); int se_dev_set_emulate_fua_read(struct se_device *, int); |