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| author | Alex Tabachnik | 2014-03-05 18:43:46 +0100 |
|---|---|---|
| committer | Roland Dreier | 2014-03-18 06:33:58 +0100 |
| commit | 7f73384752af3caf0756cf807b2f7fbac50982d1 (patch) | |
| tree | cc18e0c1ced14f344c95ed78eba17f06a507b360 /drivers/infiniband/ulp/iser/iscsi_iser.h | |
| parent | IB/iser: Generalize fall_to_bounce_buf routine (diff) | |
| download | kernel-qcow2-linux-7f73384752af3caf0756cf807b2f7fbac50982d1.tar.gz kernel-qcow2-linux-7f73384752af3caf0756cf807b2f7fbac50982d1.tar.xz kernel-qcow2-linux-7f73384752af3caf0756cf807b2f7fbac50982d1.zip | |
IB/iser: Introduce pi_enable, pi_guard module parameters
Use modparams to activate protection information support.
pi_enable bool: Based on this parameter iSER will know if it should
support T10-PI. We don't want to do this by default as it requires to
allocate and initialize extra resources. In case pi_enable=N, iSER
won't publish to SCSI midlayer any DIF capabilities.
pi_guard int: Based on this parameter iSER will publish DIX guard type
support to SCSI midlayer. 0 means CRC is allowed to be passed in DIX
buffers, 1 (or non-zero) means IP-CSUM is allowed to be passed in DIX
buffers. Note that over the wire, only CRC is allowed.
In the next phase, it is worth considering passing these parameters
from iscsid via nlmsg. This will allow these parameters to be
connection based rather than global.
Signed-off-by: Alex Tabachnik <alext@mellanox.com>
Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Diffstat (limited to 'drivers/infiniband/ulp/iser/iscsi_iser.h')
| -rw-r--r-- | drivers/infiniband/ulp/iser/iscsi_iser.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/infiniband/ulp/iser/iscsi_iser.h b/drivers/infiniband/ulp/iser/iscsi_iser.h index 623defa187b2..011003f04253 100644 --- a/drivers/infiniband/ulp/iser/iscsi_iser.h +++ b/drivers/infiniband/ulp/iser/iscsi_iser.h @@ -317,6 +317,7 @@ struct iser_conn { unsigned int rx_desc_head; struct iser_rx_desc *rx_descs; struct ib_recv_wr rx_wr[ISER_MIN_POSTED_RX]; + bool pi_support; /* Connection memory registration pool */ union { @@ -371,6 +372,8 @@ struct iser_global { extern struct iser_global ig; extern int iser_debug_level; +extern bool iser_pi_enable; +extern int iser_pi_guard; /* allocate connection resources needed for rdma functionality */ int iser_conn_set_full_featured_mode(struct iscsi_conn *conn); |