diff options
| author | Nicholas Bellinger <nab@linux-iscsi.org> | 2015-02-27 22:05:21 -0800 |
|---|---|---|
| committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2015-04-07 23:25:59 -0700 |
| commit | 38b57f82f66dfb21ebe321d71c84c0e3469980c4 (patch) | |
| tree | c5e5727d222617a6c59013f0b597b47e4f3dd9ce /drivers/target/target_core_transport.c | |
| parent | 823ddd877f3a5c301490196d369f68baa6c020e4 (diff) | |
| download | lwn-38b57f82f66dfb21ebe321d71c84c0e3469980c4.tar.gz lwn-38b57f82f66dfb21ebe321d71c84c0e3469980c4.zip | |
target: Add protected fabric + unprotected device support
This patch adds a new target_core_fabric_ops callback for allowing fabric
drivers to expose a TPG attribute for signaling when a T10-PI protected
fabric wants to function with an un-protected device without T10-PI.
This specifically is to allow LIO to perform WRITE_STRIP + READ_INSERT
operations when functioning with non T10-PI enabled devices, seperate
from any available hw offloads the fabric supports.
This is done using a new se_sess->sess_prot_type that is set at fabric
session creation time based upon the TPG attribute. It currently cannot
be changed for individual sessions after initial creation.
Also, update existing target_core_sbc.c code to honor sess_prot_type when
setting up cmd->prot_op + cmd->prot_type assignments.
(Add unlikely and !! boolean conversion in sbc_check_prot - Sagi)
Cc: Martin Petersen <martin.petersen@oracle.com>
Cc: Sagi Grimberg <sagig@mellanox.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Doug Gilbert <dgilbert@interlog.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'drivers/target/target_core_transport.c')
| -rw-r--r-- | drivers/target/target_core_transport.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c index 4a00ed5c1880..aef989e165ed 100644 --- a/drivers/target/target_core_transport.c +++ b/drivers/target/target_core_transport.c @@ -322,11 +322,19 @@ void __transport_register_session( struct se_session *se_sess, void *fabric_sess_ptr) { + struct target_core_fabric_ops *tfo = se_tpg->se_tpg_tfo; unsigned char buf[PR_REG_ISID_LEN]; se_sess->se_tpg = se_tpg; se_sess->fabric_sess_ptr = fabric_sess_ptr; /* + * Determine if fabric allows for T10-PI feature bits to be exposed + * to initiators for device backends with !dev->dev_attrib.pi_prot_type + */ + if (tfo->tpg_check_prot_fabric_only) + se_sess->sess_prot_type = tfo->tpg_check_prot_fabric_only(se_tpg); + + /* * Used by struct se_node_acl's under ConfigFS to locate active se_session-t * * Only set for struct se_session's that will actually be moving I/O. |