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author | Sagi Grimberg <sagig@mellanox.com> | 2014-03-05 19:43:50 +0200 |
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committer | Roland Dreier <roland@purestorage.com> | 2014-03-17 22:33:58 -0700 |
commit | 0a7a08ad6f5f344d592fe63403f48e67395e08bf (patch) | |
tree | f2da128941225ad2dcd4d77d6f9a0fe1727c8be3 /drivers/infiniband/ulp | |
parent | 55e51eda4820ec5a1c1fc8693a51029f74eac2b9 (diff) | |
download | op-kernel-dev-0a7a08ad6f5f344d592fe63403f48e67395e08bf.zip op-kernel-dev-0a7a08ad6f5f344d592fe63403f48e67395e08bf.tar.gz |
IB/iser: Implement check_protection
Once the iSCSI transaction is completed we must implement
check_protection in order to notify on DIF errors that may have
occured.
The routine boils down to calling ib_check_mr_status to get the
signature status of the transaction.
Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
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')
-rw-r--r-- | drivers/infiniband/ulp/iser/iscsi_iser.c | 13 | ||||
-rw-r--r-- | drivers/infiniband/ulp/iser/iscsi_iser.h | 2 | ||||
-rw-r--r-- | drivers/infiniband/ulp/iser/iser_verbs.c | 47 |
3 files changed, 62 insertions, 0 deletions
diff --git a/drivers/infiniband/ulp/iser/iscsi_iser.c b/drivers/infiniband/ulp/iser/iscsi_iser.c index a64b878..f13d7e9 100644 --- a/drivers/infiniband/ulp/iser/iscsi_iser.c +++ b/drivers/infiniband/ulp/iser/iscsi_iser.c @@ -306,6 +306,18 @@ static void iscsi_iser_cleanup_task(struct iscsi_task *task) } } +static u8 iscsi_iser_check_protection(struct iscsi_task *task, sector_t *sector) +{ + struct iscsi_iser_task *iser_task = task->dd_data; + + if (iser_task->dir[ISER_DIR_IN]) + return iser_check_task_pi_status(iser_task, ISER_DIR_IN, + sector); + else + return iser_check_task_pi_status(iser_task, ISER_DIR_OUT, + sector); +} + static struct iscsi_cls_conn * iscsi_iser_conn_create(struct iscsi_cls_session *cls_session, uint32_t conn_idx) { @@ -742,6 +754,7 @@ static struct iscsi_transport iscsi_iser_transport = { .xmit_task = iscsi_iser_task_xmit, .cleanup_task = iscsi_iser_cleanup_task, .alloc_pdu = iscsi_iser_pdu_alloc, + .check_protection = iscsi_iser_check_protection, /* recovery */ .session_recovery_timedout = iscsi_session_recovery_timedout, diff --git a/drivers/infiniband/ulp/iser/iscsi_iser.h b/drivers/infiniband/ulp/iser/iscsi_iser.h index fce5409..95f291f 100644 --- a/drivers/infiniband/ulp/iser/iscsi_iser.h +++ b/drivers/infiniband/ulp/iser/iscsi_iser.h @@ -483,4 +483,6 @@ int iser_create_fmr_pool(struct iser_conn *ib_conn, unsigned cmds_max); void iser_free_fmr_pool(struct iser_conn *ib_conn); int iser_create_fastreg_pool(struct iser_conn *ib_conn, unsigned cmds_max); void iser_free_fastreg_pool(struct iser_conn *ib_conn); +u8 iser_check_task_pi_status(struct iscsi_iser_task *iser_task, + enum iser_data_dir cmd_dir, sector_t *sector); #endif diff --git a/drivers/infiniband/ulp/iser/iser_verbs.c b/drivers/infiniband/ulp/iser/iser_verbs.c index 0404c71..abbb6ec 100644 --- a/drivers/infiniband/ulp/iser/iser_verbs.c +++ b/drivers/infiniband/ulp/iser/iser_verbs.c @@ -1153,3 +1153,50 @@ static void iser_cq_callback(struct ib_cq *cq, void *cq_context) tasklet_schedule(&device->cq_tasklet[cq_index]); } + +u8 iser_check_task_pi_status(struct iscsi_iser_task *iser_task, + enum iser_data_dir cmd_dir, sector_t *sector) +{ + struct iser_mem_reg *reg = &iser_task->rdma_regd[cmd_dir].reg; + struct fast_reg_descriptor *desc = reg->mem_h; + unsigned long sector_size = iser_task->sc->device->sector_size; + struct ib_mr_status mr_status; + int ret; + + if (desc && desc->reg_indicators & ISER_FASTREG_PROTECTED) { + desc->reg_indicators &= ~ISER_FASTREG_PROTECTED; + ret = ib_check_mr_status(desc->pi_ctx->sig_mr, + IB_MR_CHECK_SIG_STATUS, &mr_status); + if (ret) { + pr_err("ib_check_mr_status failed, ret %d\n", ret); + goto err; + } + + if (mr_status.fail_status & IB_MR_CHECK_SIG_STATUS) { + sector_t sector_off = mr_status.sig_err.sig_err_offset; + + do_div(sector_off, sector_size + 8); + *sector = scsi_get_lba(iser_task->sc) + sector_off; + + pr_err("PI error found type %d at sector %lx " + "expected %x vs actual %x\n", + mr_status.sig_err.err_type, *sector, + mr_status.sig_err.expected, + mr_status.sig_err.actual); + + switch (mr_status.sig_err.err_type) { + case IB_SIG_BAD_GUARD: + return 0x1; + case IB_SIG_BAD_REFTAG: + return 0x3; + case IB_SIG_BAD_APPTAG: + return 0x2; + } + } + } + + return 0; +err: + /* Not alot we can do here, return ambiguous guard error */ + return 0x1; +} |