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target/sbc: Add LBPRZ attribute + control CDB emulation

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This change sets the LBPRZ flag in EVPD page b2h and READ CAPACITY (16)
based on a new unmap_zeroes_data device attribute. This flag is set
automatically for iblock based on underlying block device queue's
discard_zeroes_data flag.

Signed-off-by: Jamie Pocas <[email protected]>
Signed-off-by: Nicholas Bellinger <[email protected]>
This commit is contained in:
Jamie Pocas 2015-11-29 14:44:57 -08:00 • committed by Nicholas Bellinger
commit e6f41633cb
6 changed files with 64 additions and 1 deletions
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3
include/target/target_core_base.h
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@ -63,6 +63,8 @@
#define DA_UNMAP_GRANULARITY_DEFAULT 0
/* Default unmap_granularity_alignment */
#define DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT 0
/* Default unmap_zeroes_data */
#define DA_UNMAP_ZEROES_DATA_DEFAULT 0
/* Default max_write_same_len, disabled by default */
#define DA_MAX_WRITE_SAME_LEN 0
/* Use a model alias based on the configfs backend device name */
@ -674,6 +676,7 @@ struct se_dev_attrib {
int force_pr_aptpl;
int is_nonrot;
int emulate_rest_reord;
int unmap_zeroes_data;
u32 hw_block_size;
u32 block_size;
u32 hw_max_sectors;