diff options
| author | Nicholas Bellinger <nab@linux-iscsi.org> | 2015-04-14 20:52:22 +0200 |
|---|---|---|
| committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2015-04-16 07:46:30 +0200 |
| commit | bffb5128f91e820fd8804307a6431607c2c840a4 (patch) | |
| tree | 1818f73d151f880d2e829acd8a6573a57001a1e8 | |
| parent | target/rd: Don't pass incomplete scatterlist entries to sbc_dif_verify_* (diff) | |
| download | linux-bffb5128f91e820fd8804307a6431607c2c840a4.tar.xz linux-bffb5128f91e820fd8804307a6431607c2c840a4.zip | |
target: Ensure sess_prot_type is saved across session restart
The following incremental patch saves the current sess_prot_type into
se_node_acl, and will always reset sess_prot_type if a previous saved
value exists. So the PI setting for the fabric's session with backend
devices not supporting PI is persistent across session restart.
(Fix se_node_acl dereference for discovery sessions - DanCarpenter)
Reviewed-by: Martin Petersen <martin.petersen@oracle.com>
Reviewed-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
| -rw-r--r-- | drivers/target/target_core_transport.c | 22 | ||||
| -rw-r--r-- | include/target/target_core_base.h | 1 |
2 files changed, 16 insertions, 7 deletions
diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c index 4edb183cf8df..14e324991c34 100644 --- a/drivers/target/target_core_transport.c +++ b/drivers/target/target_core_transport.c @@ -328,13 +328,6 @@ void __transport_register_session( 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. @@ -342,6 +335,21 @@ void __transport_register_session( */ if (se_nacl) { /* + * + * Determine if fabric allows for T10-PI feature bits exposed to + * initiators for device backends with !dev->dev_attrib.pi_prot_type. + * + * If so, then always save prot_type on a per se_node_acl node + * basis and re-instate the previous sess_prot_type to avoid + * disabling PI from below any previously initiator side + * registered LUNs. + */ + if (se_nacl->saved_prot_type) + se_sess->sess_prot_type = se_nacl->saved_prot_type; + else if (tfo->tpg_check_prot_fabric_only) + se_sess->sess_prot_type = se_nacl->saved_prot_type = + tfo->tpg_check_prot_fabric_only(se_tpg); + /* * If the fabric module supports an ISID based TransportID, * save this value in binary from the fabric I_T Nexus now. */ diff --git a/include/target/target_core_base.h b/include/target/target_core_base.h index e1de142b7b07..480e9f82dfea 100644 --- a/include/target/target_core_base.h +++ b/include/target/target_core_base.h @@ -589,6 +589,7 @@ struct se_node_acl { bool acl_stop:1; u32 queue_depth; u32 acl_index; + enum target_prot_type saved_prot_type; #define MAX_ACL_TAG_SIZE 64 char acl_tag[MAX_ACL_TAG_SIZE]; /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */ |