Commit 1ecc7586 authored by Lee Duncan's avatar Lee Duncan Committed by Nicholas Bellinger

target: Allow Write Exclusive non-reservation holders to READ

For PGR reservation of type Write Exclusive Access, allow all non
reservation holding I_T nexuses with active registrations to READ
from the device.

This addresses a bug where active registrations that attempted
to READ would result in an reservation conflict.
Signed-off-by: default avatarLee Duncan <lduncan@suse.com>
Signed-off-by: default avatarNicholas Bellinger <nab@linux-iscsi.org>
parent 7216dc07
...@@ -526,6 +526,18 @@ static int core_scsi3_pr_seq_non_holder( ...@@ -526,6 +526,18 @@ static int core_scsi3_pr_seq_non_holder(
" reservation\n", cdb[0], " reservation\n", cdb[0],
core_scsi3_pr_dump_type(pr_reg_type)); core_scsi3_pr_dump_type(pr_reg_type));
return 0;
}
} else if (we && registered_nexus) {
/*
* Reads are allowed for Write Exclusive locks
* from all registrants.
*/
if (cmd->data_direction == DMA_FROM_DEVICE) {
pr_debug("Allowing READ CDB: 0x%02x for %s"
" reservation\n", cdb[0],
core_scsi3_pr_dump_type(pr_reg_type));
return 0; return 0;
} }
} }
......
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