linux/drivers/target, branch v3.14

Target/sbc: Fix sbc_copy_prot for offset scatters

2014-03-07T04:52:11Z

When copying between device and command protection scatters we must take into account that device scatters might be offset and we might copy outside scatter range. Thus for each cmd prot scatter we must take the min between cmd prot scatter, dev prot scatter, and whats left (and loop in case we havn't copied enough from/to cmd prot scatter). Example (single t_prot_sg of len 2048): kernel: sbc_dif_copy_prot: se_cmd=ffff880380aaf970, left=2048, len=2048, dev_prot_sg_offset=3072, dev_prot_sg_len=4096 kernel: isert: se_cmd=ffff880380aaf970 PI error found type 0 at sector 0x2600 expected 0x0 vs actual 0x725f, lba=2580 Instead of copying 2048 from offset 3072 (copying junk outside sg limit 4096), we must to copy 1024 and continue to next sg until we complete cmd prot scatter. This issue was found using iSER T10-PI offload over rd_mcp (wasn't discovered with fileio since file_dev prot sglists are never offset). Changes from v1: - Fix sbc_copy_prot copy length miss-calculation Changes from v0: - Removed psg->offset consideration for psg_len computation - Removed sg->offset consideration for offset condition - Added copied consideraiton for len computation - Added copied offset to paddr when doing memcpy Signed-off-by: Sagi Grimberg Signed-off-by: Nicholas Bellinger

iscsi/iser-target: Fix isert_conn->state hung shutdown issues

2014-03-05T01:54:09Z

This patch addresses a couple of different hug shutdown issues related to wait_event() + isert_conn->state. First, it changes isert_conn->conn_wait + isert_conn->conn_wait_comp_err from waitqueues to completions, and sets ISER_CONN_TERMINATING from within isert_disconnect_work(). Second, it splits isert_free_conn() into isert_wait_conn() that is called earlier in iscsit_close_connection() to ensure that all outstanding commands have completed before continuing. Finally, it breaks isert_cq_comp_err() into seperate TX / RX related code, and adds logic in isert_cq_rx_comp_err() to wait for outstanding commands to complete before setting ISER_CONN_DOWN and calling complete(&isert_conn->conn_wait_comp_err). Acked-by: Sagi Grimberg Cc: Or Gerlitz Cc: #3.10+ Signed-off-by: Nicholas Bellinger

iscsi/iser-target: Use list_del_init for ->i_conn_node

2014-03-05T01:54:09Z

There are a handful of uses of list_empty() for cmd->i_conn_node within iser-target code that expect to return false once a cmd has been removed from the per connect list. This patch changes all uses of list_del -> list_del_init in order to ensure that list_empty() returns false as expected. Acked-by: Sagi Grimberg Cc: Or Gerlitz Cc: #3.10+ Signed-off-by: Nicholas Bellinger

iscsi-target: Fix iscsit_get_tpg_from_np tpg_state bug

2014-03-05T01:54:09Z

This patch fixes a bug in iscsit_get_tpg_from_np() where the tpg->tpg_state sanity check was looking for TPG_STATE_FREE, instead of != TPG_STATE_ACTIVE. The latter is expected during a normal TPG shutdown once the tpg_state goes into TPG_STATE_INACTIVE in order to reject any new incoming login attempts. Cc: #3.10+ Signed-off-by: Nicholas Bellinger

Target/sbc: Don't use sg as iterator in sbc_verify_read

2014-02-24T00:35:32Z

Because then this sg is passed to sbc_copy_prot which will hit a protection fault in cases we have more than a single sg. Signed-off-by: Sagi Grimberg Signed-off-by: Nicholas Bellinger

target: Add DIF sense codes in transport_generic_request_failure

2014-02-24T00:31:24Z

This patch adds the three missing DIF related sense codes within transport_generic_request_failure(), which are required to ensure that the correct ASC/ASQC is generated by the subsequent call to transport_send_check_condition_and_sense(). Cc: Martin K. Petersen Cc: Christoph Hellwig Cc: Hannes Reinecke Cc: Sagi Grimberg Cc: Or Gerlitz Signed-off-by: Nicholas Bellinger

target/sbc: Fix sbc_dif_copy_prot addr offset bug

2014-02-24T00:19:23Z

This patch fixes a bug in sbc_dif_copy_prot() where the updated addr offset did not take into account the case where the associated scatterlist had not been incremented. This addresses the case where incoming protection scatterlists may contain a length smaller than PAGE_SIZE across multiple entires, when the target protection scatterlists are always being explicitly filled up to PAGE_SIZE before adding another entry. Cc: Martin K. Petersen Cc: Christoph Hellwig Cc: Hannes Reinecke Cc: Sagi Grimberg Cc: Or Gerlitz Signed-off-by: Nicholas Bellinger

Target/sbc: Fix protection copy routine

2014-02-12T23:14:45Z

Need to take into account that protection sg_list (copy-buffer) may consist of multiple entries. Changes from v0: - Changed commit description Signed-off-by: Sagi Grimberg Signed-off-by: Nicholas Bellinger

target: Simplify command completion by removing CMD_T_FAILED flag

2014-02-12T23:14:30Z

The CMD_T_FAILED flag is set used in one place to record the result of a trivial test, and it is only tested once, few lines later. We might as well make the code simpler and easier to read by directly doing the test of "success" where we want to use it. Signed-off-by: Roland Dreier Signed-off-by: Nicholas Bellinger

iscsi-target: Fix SNACK Type 1 + BegRun=0 handling

2014-02-12T23:11:17Z

This patch fixes Status SNACK handling of BegRun=0 to allow for all unacknowledged respones to be resent, instead of always assuming that BegRun would be an explicit value less than the current ExpStatSN. Reported-by: santosh kulkarni Signed-off-by: Nicholas Bellinger