diff options
| author | Lee Duncan <lduncan@suse.com> | 2015-01-05 10:49:44 -0800 |
|---|---|---|
| committer | Jiri Slaby <jslaby@suse.cz> | 2015-04-09 13:14:23 +0200 |
| commit | e007687cc30fce23db509de2392794526d3c51b0 (patch) | |
| tree | b10f0197f3133143a05d1aa68535060af83c4392 /drivers | |
| parent | 84d0034c5f825a7ce219a64e52976a45eb490e4d (diff) | |
target: Allow Write Exclusive non-reservation holders to READ
commit 1ecc7586922662e3ca2f3f0c3f17fec8749fc621 upstream.
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>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Diffstat (limited to 'drivers')
| -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 98e2f02b48f6..a50982a7304f 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), |