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Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/…
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…git/nab/target-pending

Pull SCSI target updates from Nicholas Bellinger:
 "Things have been quiet this round with mostly bugfixes, percpu
  conversions, and other minor iscsi-target conformance testing changes.

  The highlights include:

   - Add demo_mode_discovery attribute for iscsi-target (Thomas)
   - Convert tcm_fc(FCoE) to use percpu-ida pre-allocation
   - Add send completion interrupt coalescing for ib_isert
   - Convert target-core to use percpu-refcounting for se_lun
   - Fix mutex_trylock usage bug in iscsit_increment_maxcmdsn
   - tcm_loop updates (Hannes)
   - target-core ALUA cleanups + prep for v3.14 SCSI Referrals support (Hannes)

  v3.14 is currently shaping to be a busy development cycle in target
  land, with initial support for T10 Referrals and T10 DIF currently on
  the roadmap"

* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: (40 commits)
  iscsi-target: chap auth shouldn't match username with trailing garbage
  iscsi-target: fix extract_param to handle buffer length corner case
  iscsi-target: Expose default_erl as TPG attribute
  target_core_configfs: split up ALUA supported states
  target_core_alua: Make supported states configurable
  target_core_alua: Store supported ALUA states
  target_core_alua: Rename ALUA_ACCESS_STATE_OPTIMIZED
  target_core_alua: spellcheck
  target core: rename (ex,im)plict -> (ex,im)plicit
  percpu-refcount: Add percpu-refcount.o to obj-y
  iscsi-target: Do not reject non-immediate CmdSNs exceeding MaxCmdSN
  iscsi-target: Convert iscsi_session statistics to atomic_long_t
  target: Convert se_device statistics to atomic_long_t
  target: Fix delayed Task Aborted Status (TAS) handling bug
  iscsi-target: Reject unsupported multi PDU text command sequence
  ib_isert: Avoid duplicate iscsit_increment_maxcmdsn call
  iscsi-target: Fix mutex_trylock usage in iscsit_increment_maxcmdsn
  target: Core does not need blkdev.h
  target: Pass through I/O topology for block backstores
  iser-target: Avoid using FRMR for single dma entry requests
  ...
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Linus Torvalds committed Nov 22, 2013
2 parents 0032cde + 86784c6 commit b0e3636
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Showing 53 changed files with 1,009 additions and 789 deletions.
18 changes: 9 additions & 9 deletions Documentation/target/tcm_mod_builder.py
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Original file line number Diff line number Diff line change
Expand Up @@ -440,15 +440,15 @@ def tcm_mod_build_configfs(proto_ident, fabric_mod_dir_var, fabric_mod_name):
buf += " /*\n"
buf += " * Setup default attribute lists for various fabric->tf_cit_tmpl\n"
buf += " */\n"
buf += " TF_CIT_TMPL(fabric)->tfc_wwn_cit.ct_attrs = " + fabric_mod_name + "_wwn_attrs;\n"
buf += " TF_CIT_TMPL(fabric)->tfc_tpg_base_cit.ct_attrs = NULL;\n"
buf += " TF_CIT_TMPL(fabric)->tfc_tpg_attrib_cit.ct_attrs = NULL;\n"
buf += " TF_CIT_TMPL(fabric)->tfc_tpg_param_cit.ct_attrs = NULL;\n"
buf += " TF_CIT_TMPL(fabric)->tfc_tpg_np_base_cit.ct_attrs = NULL;\n"
buf += " TF_CIT_TMPL(fabric)->tfc_tpg_nacl_base_cit.ct_attrs = NULL;\n"
buf += " TF_CIT_TMPL(fabric)->tfc_tpg_nacl_attrib_cit.ct_attrs = NULL;\n"
buf += " TF_CIT_TMPL(fabric)->tfc_tpg_nacl_auth_cit.ct_attrs = NULL;\n"
buf += " TF_CIT_TMPL(fabric)->tfc_tpg_nacl_param_cit.ct_attrs = NULL;\n"
buf += " fabric->tf_cit_tmpl.tfc_wwn_cit.ct_attrs = " + fabric_mod_name + "_wwn_attrs;\n"
buf += " fabric->tf_cit_tmpl.tfc_tpg_base_cit.ct_attrs = NULL;\n"
buf += " fabric->tf_cit_tmpl.tfc_tpg_attrib_cit.ct_attrs = NULL;\n"
buf += " fabric->tf_cit_tmpl.tfc_tpg_param_cit.ct_attrs = NULL;\n"
buf += " fabric->tf_cit_tmpl.tfc_tpg_np_base_cit.ct_attrs = NULL;\n"
buf += " fabric->tf_cit_tmpl.tfc_tpg_nacl_base_cit.ct_attrs = NULL;\n"
buf += " fabric->tf_cit_tmpl.tfc_tpg_nacl_attrib_cit.ct_attrs = NULL;\n"
buf += " fabric->tf_cit_tmpl.tfc_tpg_nacl_auth_cit.ct_attrs = NULL;\n"
buf += " fabric->tf_cit_tmpl.tfc_tpg_nacl_param_cit.ct_attrs = NULL;\n"
buf += " /*\n"
buf += " * Register the fabric for use within TCM\n"
buf += " */\n"
Expand Down
99 changes: 71 additions & 28 deletions drivers/infiniband/ulp/isert/ib_isert.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -22,6 +22,7 @@
#include <linux/socket.h>
#include <linux/in.h>
#include <linux/in6.h>
#include <linux/llist.h>
#include <rdma/ib_verbs.h>
#include <rdma/rdma_cm.h>
#include <target/target_core_base.h>
Expand Down Expand Up @@ -489,6 +490,7 @@ isert_connect_request(struct rdma_cm_id *cma_id, struct rdma_cm_event *event)
kref_init(&isert_conn->conn_kref);
kref_get(&isert_conn->conn_kref);
mutex_init(&isert_conn->conn_mutex);
mutex_init(&isert_conn->conn_comp_mutex);
spin_lock_init(&isert_conn->conn_lock);

cma_id->context = isert_conn;
Expand Down Expand Up @@ -843,14 +845,32 @@ isert_init_tx_hdrs(struct isert_conn *isert_conn,
}

static void
isert_init_send_wr(struct isert_cmd *isert_cmd, struct ib_send_wr *send_wr)
isert_init_send_wr(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd,
struct ib_send_wr *send_wr, bool coalesce)
{
struct iser_tx_desc *tx_desc = &isert_cmd->tx_desc;

isert_cmd->rdma_wr.iser_ib_op = ISER_IB_SEND;
send_wr->wr_id = (unsigned long)&isert_cmd->tx_desc;
send_wr->opcode = IB_WR_SEND;
send_wr->send_flags = IB_SEND_SIGNALED;
send_wr->sg_list = &isert_cmd->tx_desc.tx_sg[0];
send_wr->sg_list = &tx_desc->tx_sg[0];
send_wr->num_sge = isert_cmd->tx_desc.num_sge;
/*
* Coalesce send completion interrupts by only setting IB_SEND_SIGNALED
* bit for every ISERT_COMP_BATCH_COUNT number of ib_post_send() calls.
*/
mutex_lock(&isert_conn->conn_comp_mutex);
if (coalesce &&
++isert_conn->conn_comp_batch < ISERT_COMP_BATCH_COUNT) {
llist_add(&tx_desc->comp_llnode, &isert_conn->conn_comp_llist);
mutex_unlock(&isert_conn->conn_comp_mutex);
return;
}
isert_conn->conn_comp_batch = 0;
tx_desc->comp_llnode_batch = llist_del_all(&isert_conn->conn_comp_llist);
mutex_unlock(&isert_conn->conn_comp_mutex);

send_wr->send_flags = IB_SEND_SIGNALED;
}

static int
Expand Down Expand Up @@ -1582,8 +1602,8 @@ isert_response_completion(struct iser_tx_desc *tx_desc,
}

static void
isert_send_completion(struct iser_tx_desc *tx_desc,
struct isert_conn *isert_conn)
__isert_send_completion(struct iser_tx_desc *tx_desc,
struct isert_conn *isert_conn)
{
struct ib_device *ib_dev = isert_conn->conn_cm_id->device;
struct isert_cmd *isert_cmd = tx_desc->isert_cmd;
Expand Down Expand Up @@ -1623,6 +1643,24 @@ isert_send_completion(struct iser_tx_desc *tx_desc,
}
}

static void
isert_send_completion(struct iser_tx_desc *tx_desc,
struct isert_conn *isert_conn)
{
struct llist_node *llnode = tx_desc->comp_llnode_batch;
struct iser_tx_desc *t;
/*
* Drain coalesced completion llist starting from comp_llnode_batch
* setup in isert_init_send_wr(), and then complete trailing tx_desc.
*/
while (llnode) {
t = llist_entry(llnode, struct iser_tx_desc, comp_llnode);
llnode = llist_next(llnode);
__isert_send_completion(t, isert_conn);
}
__isert_send_completion(tx_desc, isert_conn);
}

static void
isert_cq_comp_err(struct iser_tx_desc *tx_desc, struct isert_conn *isert_conn)
{
Expand Down Expand Up @@ -1793,7 +1831,7 @@ isert_put_response(struct iscsi_conn *conn, struct iscsi_cmd *cmd)
isert_cmd->tx_desc.num_sge = 2;
}

isert_init_send_wr(isert_cmd, send_wr);
isert_init_send_wr(isert_conn, isert_cmd, send_wr, true);

pr_debug("Posting SCSI Response IB_WR_SEND >>>>>>>>>>>>>>>>>>>>>>\n");

Expand All @@ -1813,7 +1851,7 @@ isert_put_nopin(struct iscsi_cmd *cmd, struct iscsi_conn *conn,
&isert_cmd->tx_desc.iscsi_header,
nopout_response);
isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc);
isert_init_send_wr(isert_cmd, send_wr);
isert_init_send_wr(isert_conn, isert_cmd, send_wr, false);

pr_debug("Posting NOPIN Response IB_WR_SEND >>>>>>>>>>>>>>>>>>>>>>\n");

Expand All @@ -1831,7 +1869,7 @@ isert_put_logout_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn)
iscsit_build_logout_rsp(cmd, conn, (struct iscsi_logout_rsp *)
&isert_cmd->tx_desc.iscsi_header);
isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc);
isert_init_send_wr(isert_cmd, send_wr);
isert_init_send_wr(isert_conn, isert_cmd, send_wr, false);

pr_debug("Posting Logout Response IB_WR_SEND >>>>>>>>>>>>>>>>>>>>>>\n");

Expand All @@ -1849,7 +1887,7 @@ isert_put_tm_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn)
iscsit_build_task_mgt_rsp(cmd, conn, (struct iscsi_tm_rsp *)
&isert_cmd->tx_desc.iscsi_header);
isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc);
isert_init_send_wr(isert_cmd, send_wr);
isert_init_send_wr(isert_conn, isert_cmd, send_wr, false);

pr_debug("Posting Task Management Response IB_WR_SEND >>>>>>>>>>>>>>>>>>>>>>\n");

Expand Down Expand Up @@ -1881,7 +1919,7 @@ isert_put_reject(struct iscsi_cmd *cmd, struct iscsi_conn *conn)
tx_dsg->lkey = isert_conn->conn_mr->lkey;
isert_cmd->tx_desc.num_sge = 2;

isert_init_send_wr(isert_cmd, send_wr);
isert_init_send_wr(isert_conn, isert_cmd, send_wr, false);

pr_debug("Posting Reject IB_WR_SEND >>>>>>>>>>>>>>>>>>>>>>\n");

Expand Down Expand Up @@ -1921,7 +1959,7 @@ isert_put_text_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn)
tx_dsg->lkey = isert_conn->conn_mr->lkey;
isert_cmd->tx_desc.num_sge = 2;
}
isert_init_send_wr(isert_cmd, send_wr);
isert_init_send_wr(isert_conn, isert_cmd, send_wr, false);

pr_debug("Posting Text Response IB_WR_SEND >>>>>>>>>>>>>>>>>>>>>>\n");

Expand Down Expand Up @@ -1991,8 +2029,6 @@ isert_map_rdma(struct iscsi_conn *conn, struct iscsi_cmd *cmd,

if (wr->iser_ib_op == ISER_IB_RDMA_WRITE) {
data_left = se_cmd->data_length;
iscsit_increment_maxcmdsn(cmd, conn->sess);
cmd->stat_sn = conn->stat_sn++;
} else {
sg_off = cmd->write_data_done / PAGE_SIZE;
data_left = se_cmd->data_length - cmd->write_data_done;
Expand Down Expand Up @@ -2204,8 +2240,6 @@ isert_reg_rdma_frwr(struct iscsi_conn *conn, struct iscsi_cmd *cmd,

if (wr->iser_ib_op == ISER_IB_RDMA_WRITE) {
data_left = se_cmd->data_length;
iscsit_increment_maxcmdsn(cmd, conn->sess);
cmd->stat_sn = conn->stat_sn++;
} else {
sg_off = cmd->write_data_done / PAGE_SIZE;
data_left = se_cmd->data_length - cmd->write_data_done;
Expand Down Expand Up @@ -2259,18 +2293,26 @@ isert_reg_rdma_frwr(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
data_len = min(data_left, rdma_write_max);
wr->cur_rdma_length = data_len;

spin_lock_irqsave(&isert_conn->conn_lock, flags);
fr_desc = list_first_entry(&isert_conn->conn_frwr_pool,
struct fast_reg_descriptor, list);
list_del(&fr_desc->list);
spin_unlock_irqrestore(&isert_conn->conn_lock, flags);
wr->fr_desc = fr_desc;
/* if there is a single dma entry, dma mr is sufficient */
if (count == 1) {
ib_sge->addr = ib_sg_dma_address(ib_dev, &sg_start[0]);
ib_sge->length = ib_sg_dma_len(ib_dev, &sg_start[0]);
ib_sge->lkey = isert_conn->conn_mr->lkey;
wr->fr_desc = NULL;
} else {
spin_lock_irqsave(&isert_conn->conn_lock, flags);
fr_desc = list_first_entry(&isert_conn->conn_frwr_pool,
struct fast_reg_descriptor, list);
list_del(&fr_desc->list);
spin_unlock_irqrestore(&isert_conn->conn_lock, flags);
wr->fr_desc = fr_desc;

ret = isert_fast_reg_mr(fr_desc, isert_cmd, isert_conn,
ib_sge, offset, data_len);
if (ret) {
list_add_tail(&fr_desc->list, &isert_conn->conn_frwr_pool);
goto unmap_sg;
ret = isert_fast_reg_mr(fr_desc, isert_cmd, isert_conn,
ib_sge, offset, data_len);
if (ret) {
list_add_tail(&fr_desc->list, &isert_conn->conn_frwr_pool);
goto unmap_sg;
}
}

return 0;
Expand Down Expand Up @@ -2306,10 +2348,11 @@ isert_put_datain(struct iscsi_conn *conn, struct iscsi_cmd *cmd)
* Build isert_conn->tx_desc for iSCSI response PDU and attach
*/
isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc);
iscsit_build_rsp_pdu(cmd, conn, false, (struct iscsi_scsi_rsp *)
iscsit_build_rsp_pdu(cmd, conn, true, (struct iscsi_scsi_rsp *)
&isert_cmd->tx_desc.iscsi_header);
isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc);
isert_init_send_wr(isert_cmd, &isert_cmd->tx_desc.send_wr);
isert_init_send_wr(isert_conn, isert_cmd,
&isert_cmd->tx_desc.send_wr, true);

atomic_inc(&isert_conn->post_send_buf_count);

Expand Down
6 changes: 6 additions & 0 deletions drivers/infiniband/ulp/isert/ib_isert.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -43,6 +43,8 @@ struct iser_tx_desc {
struct ib_sge tx_sg[2];
int num_sge;
struct isert_cmd *isert_cmd;
struct llist_node *comp_llnode_batch;
struct llist_node comp_llnode;
struct ib_send_wr send_wr;
} __packed;

Expand Down Expand Up @@ -121,6 +123,10 @@ struct isert_conn {
int conn_frwr_pool_size;
/* lock to protect frwr_pool */
spinlock_t conn_lock;
#define ISERT_COMP_BATCH_COUNT 8
int conn_comp_batch;
struct llist_head conn_comp_llist;
struct mutex conn_comp_mutex;
};

#define ISERT_MAX_CQ 64
Expand Down
10 changes: 0 additions & 10 deletions drivers/infiniband/ulp/srpt/ib_srpt.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -1352,21 +1352,15 @@ static int srpt_abort_cmd(struct srpt_send_ioctx *ioctx)

/* XXX(hch): this is a horrible layering violation.. */
spin_lock_irqsave(&ioctx->cmd.t_state_lock, flags);
ioctx->cmd.transport_state |= CMD_T_LUN_STOP;
ioctx->cmd.transport_state &= ~CMD_T_ACTIVE;
spin_unlock_irqrestore(&ioctx->cmd.t_state_lock, flags);

complete(&ioctx->cmd.transport_lun_stop_comp);
break;
case SRPT_STATE_CMD_RSP_SENT:
/*
* SRP_RSP sending failed or the SRP_RSP send completion has
* not been received in time.
*/
srpt_unmap_sg_to_ib_sge(ioctx->ch, ioctx);
spin_lock_irqsave(&ioctx->cmd.t_state_lock, flags);
ioctx->cmd.transport_state |= CMD_T_LUN_STOP;
spin_unlock_irqrestore(&ioctx->cmd.t_state_lock, flags);
target_put_sess_cmd(ioctx->ch->sess, &ioctx->cmd);
break;
case SRPT_STATE_MGMT_RSP_SENT:
Expand Down Expand Up @@ -1476,7 +1470,6 @@ static void srpt_handle_rdma_err_comp(struct srpt_rdma_ch *ch,
{
struct se_cmd *cmd;
enum srpt_command_state state;
unsigned long flags;

cmd = &ioctx->cmd;
state = srpt_get_cmd_state(ioctx);
Expand All @@ -1496,9 +1489,6 @@ static void srpt_handle_rdma_err_comp(struct srpt_rdma_ch *ch,
__func__, __LINE__, state);
break;
case SRPT_RDMA_WRITE_LAST:
spin_lock_irqsave(&ioctx->cmd.t_state_lock, flags);
ioctx->cmd.transport_state |= CMD_T_LUN_STOP;
spin_unlock_irqrestore(&ioctx->cmd.t_state_lock, flags);
break;
default:
printk(KERN_ERR "%s[%d]: opcode = %u\n", __func__,
Expand Down
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