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| author | Lee Duncan <lduncan@suse.com> | 2015-01-05 10:49:44 -0800 |
|---|---|---|
| committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2015-01-09 15:22:14 -0800 |
| commit | 1ecc7586922662e3ca2f3f0c3f17fec8749fc621 (patch) | |
| tree | 664763703acb720ca3a7daa86fe16b389c9793cd /drivers/target | |
| parent | 7216dc077dfcd46e2e0143f57711c8dd2eb99e68 (diff) | |
| download | op-kernel-dev-1ecc7586922662e3ca2f3f0c3f17fec8749fc621.zip op-kernel-dev-1ecc7586922662e3ca2f3f0c3f17fec8749fc621.tar.gz | |
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: Lee Duncan <lduncan@suse.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'drivers/target')
| -rw-r--r-- | drivers/target/target_core_pr.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/target/target_core_pr.c b/drivers/target/target_core_pr.c index d56f2aa..283cf78 100644 --- a/drivers/target/target_core_pr.c +++ b/drivers/target/target_core_pr.c @@ -528,6 +528,18 @@ static int core_scsi3_pr_seq_non_holder( 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; + } } pr_debug("%s Conflict for %sregistered nexus %s CDB: 0x%2x" " for %s reservation\n", transport_dump_cmd_direction(cmd), |
