diff options
Diffstat (limited to 'drivers/target')
| -rw-r--r-- | drivers/target/target_core_alua.c | 42 | ||||
| -rw-r--r-- | drivers/target/target_core_cdb.c | 69 | ||||
| -rw-r--r-- | drivers/target/target_core_device.c | 5 | ||||
| -rw-r--r-- | drivers/target/target_core_pr.c | 60 | ||||
| -rw-r--r-- | drivers/target/target_core_pscsi.c | 32 | ||||
| -rw-r--r-- | drivers/target/target_core_transport.c | 159 | ||||
| -rw-r--r-- | drivers/target/tcm_fc/tfc_cmd.c | 4 | ||||
| -rw-r--r-- | drivers/target/tcm_fc/tfc_io.c | 61 |
8 files changed, 215 insertions, 217 deletions
diff --git a/drivers/target/target_core_alua.c b/drivers/target/target_core_alua.c index 76d506fe99e0..dba412ff3718 100644 --- a/drivers/target/target_core_alua.c +++ b/drivers/target/target_core_alua.c @@ -65,10 +65,12 @@ int core_emulate_report_target_port_groups(struct se_cmd *cmd) struct se_port *port; struct t10_alua_tg_pt_gp *tg_pt_gp; struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; - unsigned char *buf = (unsigned char *)cmd->t_task_buf; + unsigned char *buf; u32 rd_len = 0, off = 4; /* Skip over RESERVED area to first Target port group descriptor */ + buf = transport_kmap_first_data_page(cmd); + spin_lock(&su_dev->t10_alua.tg_pt_gps_lock); list_for_each_entry(tg_pt_gp, &su_dev->t10_alua.tg_pt_gps_list, tg_pt_gp_list) { @@ -141,6 +143,8 @@ int core_emulate_report_target_port_groups(struct se_cmd *cmd) buf[2] = ((rd_len >> 8) & 0xff); buf[3] = (rd_len & 0xff); + transport_kunmap_first_data_page(cmd); + return 0; } @@ -157,14 +161,17 @@ int core_emulate_set_target_port_groups(struct se_cmd *cmd) struct se_node_acl *nacl = cmd->se_sess->se_node_acl; struct t10_alua_tg_pt_gp *tg_pt_gp = NULL, *l_tg_pt_gp; struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem, *l_tg_pt_gp_mem; - unsigned char *buf = (unsigned char *)cmd->t_task_buf; - unsigned char *ptr = &buf[4]; /* Skip over RESERVED area in header */ + unsigned char *buf; + unsigned char *ptr; u32 len = 4; /* Skip over RESERVED area in header */ int alua_access_state, primary = 0, rc; u16 tg_pt_id, rtpi; if (!(l_port)) return PYX_TRANSPORT_LU_COMM_FAILURE; + + buf = transport_kmap_first_data_page(cmd); + /* * Determine if explict ALUA via SET_TARGET_PORT_GROUPS is allowed * for the local tg_pt_gp. @@ -172,14 +179,16 @@ int core_emulate_set_target_port_groups(struct se_cmd *cmd) l_tg_pt_gp_mem = l_port->sep_alua_tg_pt_gp_mem; if (!(l_tg_pt_gp_mem)) { printk(KERN_ERR "Unable to access l_port->sep_alua_tg_pt_gp_mem\n"); - return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; + rc = PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; + goto out; } spin_lock(&l_tg_pt_gp_mem->tg_pt_gp_mem_lock); l_tg_pt_gp = l_tg_pt_gp_mem->tg_pt_gp; if (!(l_tg_pt_gp)) { spin_unlock(&l_tg_pt_gp_mem->tg_pt_gp_mem_lock); printk(KERN_ERR "Unable to access *l_tg_pt_gp_mem->tg_pt_gp\n"); - return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; + rc = PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; + goto out; } rc = (l_tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICT_ALUA); spin_unlock(&l_tg_pt_gp_mem->tg_pt_gp_mem_lock); @@ -187,9 +196,12 @@ int core_emulate_set_target_port_groups(struct se_cmd *cmd) if (!(rc)) { printk(KERN_INFO "Unable to process SET_TARGET_PORT_GROUPS" " while TPGS_EXPLICT_ALUA is disabled\n"); - return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; + rc = PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; + goto out; } + ptr = &buf[4]; /* Skip over RESERVED area in header */ + while (len < cmd->data_length) { alua_access_state = (ptr[0] & 0x0f); /* @@ -209,7 +221,8 @@ int core_emulate_set_target_port_groups(struct se_cmd *cmd) * REQUEST, and the additional sense code set to INVALID * FIELD IN PARAMETER LIST. */ - return PYX_TRANSPORT_INVALID_PARAMETER_LIST; + rc = PYX_TRANSPORT_INVALID_PARAMETER_LIST; + goto out; } rc = -1; /* @@ -260,8 +273,10 @@ int core_emulate_set_target_port_groups(struct se_cmd *cmd) * If not matching target port group ID can be located * throw an exception with ASCQ: INVALID_PARAMETER_LIST */ - if (rc != 0) - return PYX_TRANSPORT_INVALID_PARAMETER_LIST; + if (rc != 0) { + rc = PYX_TRANSPORT_INVALID_PARAMETER_LIST; + goto out; + } } else { /* * Extact the RELATIVE TARGET PORT IDENTIFIER to identify @@ -295,14 +310,19 @@ int core_emulate_set_target_port_groups(struct se_cmd *cmd) * be located, throw an exception with ASCQ: * INVALID_PARAMETER_LIST */ - if (rc != 0) - return PYX_TRANSPORT_INVALID_PARAMETER_LIST; + if (rc != 0) { + rc = PYX_TRANSPORT_INVALID_PARAMETER_LIST; + goto out; + } } ptr += 4; len += 4; } +out: + transport_kunmap_first_data_page(cmd); + return 0; } diff --git a/drivers/target/target_core_cdb.c b/drivers/target/target_core_cdb.c index 432253034de0..418282d926fa 100644 --- a/drivers/target/target_core_cdb.c +++ b/drivers/target/target_core_cdb.c @@ -66,7 +66,7 @@ target_emulate_inquiry_std(struct se_cmd *cmd) { struct se_lun *lun = cmd->se_lun; struct se_device *dev = cmd->se_dev; - unsigned char *buf = cmd->t_task_buf; + unsigned char *buf; /* * Make sure we at least have 6 bytes of INQUIRY response @@ -78,6 +78,8 @@ target_emulate_inquiry_std(struct se_cmd *cmd) return -EINVAL; } + buf = transport_kmap_first_data_page(cmd); + buf[0] = dev->transport->get_device_type(dev); if (buf[0] == TYPE_TAPE) buf[1] = 0x80; @@ -91,7 +93,7 @@ target_emulate_inquiry_std(struct se_cmd *cmd) if (cmd->data_length < 8) { buf[4] = 1; /* Set additional length to 1 */ - return 0; + goto out; } buf[7] = 0x32; /* Sync=1 and CmdQue=1 */ @@ -102,7 +104,7 @@ target_emulate_inquiry_std(struct se_cmd *cmd) */ if (cmd->data_length < 36) { buf[4] = 3; /* Set additional length to 3 */ - return 0; + goto out; } snprintf((unsigned char *)&buf[8], 8, "LIO-ORG"); @@ -111,6 +113,9 @@ target_emulate_inquiry_std(struct se_cmd *cmd) snprintf((unsigned char *)&buf[32], 4, "%s", &dev->se_sub_dev->t10_wwn.revision[0]); buf[4] = 31; /* Set additional length to 31 */ + +out: + transport_kunmap_first_data_page(cmd); return 0; } @@ -647,9 +652,9 @@ static int target_emulate_inquiry(struct se_cmd *cmd) { struct se_device *dev = cmd->se_dev; - unsigned char *buf = cmd->t_task_buf; + unsigned char *buf; unsigned char *cdb = cmd->t_task_cdb; - int p; + int p, ret; if (!(cdb[1] & 0x1)) return target_emulate_inquiry_std(cmd); @@ -666,14 +671,20 @@ target_emulate_inquiry(struct se_cmd *cmd) " too small for EVPD=1\n", cmd->data_length); return -EINVAL; } + + buf = transport_kmap_first_data_page(cmd); + buf[0] = dev->transport->get_device_type(dev); for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p) if (cdb[2] == evpd_handlers[p].page) { buf[1] = cdb[2]; - return evpd_handlers[p].emulate(cmd, buf); + ret = evpd_handlers[p].emulate(cmd, buf); + transport_kunmap_first_data_page(cmd); + return ret; } + transport_kunmap_first_data_page(cmd); printk(KERN_ERR "Unknown VPD Code: 0x%02x\n", cdb[2]); return -EINVAL; } @@ -682,7 +693,7 @@ static int target_emulate_readcapacity(struct se_cmd *cmd) { struct se_device *dev = cmd->se_dev; - unsigned char *buf = cmd->t_task_buf; + unsigned char *buf; unsigned long long blocks_long = dev->transport->get_blocks(dev); u32 blocks; @@ -691,6 +702,8 @@ target_emulate_readcapacity(struct se_cmd *cmd) else blocks = (u32)blocks_long; + buf = transport_kmap_first_data_page(cmd); + buf[0] = (blocks >> 24) & 0xff; buf[1] = (blocks >> 16) & 0xff; buf[2] = (blocks >> 8) & 0xff; @@ -705,6 +718,8 @@ target_emulate_readcapacity(struct se_cmd *cmd) if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws) put_unaligned_be32(0xFFFFFFFF, &buf[0]); + transport_kunmap_first_data_page(cmd); + return 0; } @@ -712,9 +727,11 @@ static int target_emulate_readcapacity_16(struct se_cmd *cmd) { struct se_device *dev = cmd->se_dev; - unsigned char *buf = cmd->t_task_buf; + unsigned char *buf; unsigned long long blocks = dev->transport->get_blocks(dev); + buf = transport_kmap_first_data_page(cmd); + buf[0] = (blocks >> 56) & 0xff; buf[1] = (blocks >> 48) & 0xff; buf[2] = (blocks >> 40) & 0xff; @@ -734,6 +751,8 @@ target_emulate_readcapacity_16(struct se_cmd *cmd) if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws) buf[14] = 0x80; + transport_kunmap_first_data_page(cmd); + return 0; } @@ -848,7 +867,7 @@ target_emulate_modesense(struct se_cmd *cmd, int ten) { struct se_device *dev = cmd->se_dev; char *cdb = cmd->t_task_cdb; - unsigned char *rbuf = cmd->t_task_buf; + unsigned char *rbuf; int type = dev->transport->get_device_type(dev); int offset = (ten) ? 8 : 4; int length = 0; @@ -911,7 +930,10 @@ target_emulate_modesense(struct se_cmd *cmd, int ten) if ((offset + 1) > cmd->data_length) offset = cmd->data_length; } + + rbuf = transport_kmap_first_data_page(cmd); memcpy(rbuf, buf, offset); + transport_kunmap_first_data_page(cmd); return 0; } @@ -920,14 +942,18 @@ static int target_emulate_request_sense(struct se_cmd *cmd) { unsigned char *cdb = cmd->t_task_cdb; - unsigned char *buf = cmd->t_task_buf; + unsigned char *buf; u8 ua_asc = 0, ua_ascq = 0; + int err = 0; if (cdb[1] & 0x01) { printk(KERN_ERR "REQUEST_SENSE description emulation not" " supported\n"); return PYX_TRANSPORT_INVALID_CDB_FIELD; } + + buf = transport_kmap_first_data_page(cmd); + if (!(core_scsi3_ua_clear_for_request_sense(cmd, &ua_asc, &ua_ascq))) { /* * CURRENT ERROR, UNIT ATTENTION @@ -940,7 +966,8 @@ target_emulate_request_sense(struct se_cmd *cmd) */ if (cmd->data_length <= 18) { buf[7] = 0x00; - return 0; + err = -EINVAL; + goto end; } /* * The Additional Sense Code (ASC) from the UNIT ATTENTION @@ -960,7 +987,8 @@ target_emulate_request_sense(struct se_cmd *cmd) */ if (cmd->data_length <= 18) { buf[7] = 0x00; - return 0; + err = -EINVAL; + goto end; } /* * NO ADDITIONAL SENSE INFORMATION @@ -969,6 +997,9 @@ target_emulate_request_sense(struct se_cmd *cmd) buf[7] = 0x0A; } +end: + transport_kunmap_first_data_page(cmd); + return 0; } @@ -981,11 +1012,11 @@ target_emulate_unmap(struct se_task *task) { struct se_cmd *cmd = task->task_se_cmd; struct se_device *dev = cmd->se_dev; - unsigned char *buf = cmd->t_task_buf, *ptr = NULL; + unsigned char *buf, *ptr = NULL; unsigned char *cdb = &cmd->t_task_cdb[0]; sector_t lba; unsigned int size = cmd->data_length, range; - int ret, offset; + int ret = 0, offset; unsigned short dl, bd_dl; /* First UNMAP block descriptor starts at 8 byte offset */ @@ -993,6 +1024,9 @@ target_emulate_unmap(struct se_task *task) size -= 8; dl = get_unaligned_be16(&cdb[0]); bd_dl = get_unaligned_be16(&cdb[2]); + + buf = transport_kmap_first_data_page(cmd); + ptr = &buf[offset]; printk(KERN_INFO "UNMAP: Sub: %s Using dl: %hu bd_dl: %hu size: %hu" " ptr: %p\n", dev->transport->name, dl, bd_dl, size, ptr); @@ -1007,7 +1041,7 @@ target_emulate_unmap(struct se_task *task) if (ret < 0) { printk(KERN_ERR "blkdev_issue_discard() failed: %d\n", ret); - return ret; + goto err; } ptr += 16; @@ -1016,7 +1050,10 @@ target_emulate_unmap(struct se_task *task) task->task_scsi_status = GOOD; transport_complete_task(task, 1); - return 0; +err: + transport_kunmap_first_data_page(cmd); + + return ret; } /* diff --git a/drivers/target/target_core_device.c b/drivers/target/target_core_device.c index 440e6b69d47b..1185c3b76d47 100644 --- a/drivers/target/target_core_device.c +++ b/drivers/target/target_core_device.c @@ -657,7 +657,7 @@ int transport_core_report_lun_response(struct se_cmd *se_cmd) struct se_lun *se_lun; struct se_session *se_sess = se_cmd->se_sess; struct se_task *se_task; - unsigned char *buf = se_cmd->t_task_buf; + unsigned char *buf; u32 cdb_offset = 0, lun_count = 0, offset = 8, i; list_for_each_entry(se_task, &se_cmd->t_task_list, t_list) @@ -668,6 +668,8 @@ int transport_core_report_lun_response(struct se_cmd *se_cmd) return PYX_TRANSPORT_LU_COMM_FAILURE; } + buf = transport_kmap_first_data_page(se_cmd); + /* * If no struct se_session pointer is present, this struct se_cmd is * coming via a target_core_mod PASSTHROUGH op, and not through @@ -704,6 +706,7 @@ int transport_core_report_lun_response(struct se_cmd *se_cmd) * See SPC3 r07, page 159. */ done: + transport_kunmap_first_data_page(se_cmd); lun_count *= 8; buf[0] = ((lun_count >> 24) & 0xff); buf[1] = ((lun_count >> 16) & 0xff); diff --git a/drivers/target/target_core_pr.c b/drivers/target/target_core_pr.c index 4fdede8da0c6..3342843f8619 100644 --- a/drivers/target/target_core_pr.c +++ b/drivers/target/target_core_pr.c @@ -1482,7 +1482,7 @@ static int core_scsi3_decode_spec_i_port( struct list_head tid_dest_list; struct pr_transport_id_holder *tidh_new, *tidh, *tidh_tmp; struct target_core_fabric_ops *tmp_tf_ops; - unsigned char *buf = (unsigned char *)cmd->t_task_buf; + unsigned char *buf; unsigned char *ptr, *i_str = NULL, proto_ident, tmp_proto_ident; char *iport_ptr = NULL, dest_iport[64], i_buf[PR_REG_ISID_ID_LEN]; u32 tpdl, tid_len = 0; @@ -1524,6 +1524,8 @@ static int core_scsi3_decode_spec_i_port( */ tidh_new->dest_local_nexus = 1; list_add_tail(&tidh_new->dest_list, &tid_dest_list); + + buf = transport_kmap_first_data_page(cmd); /* * For a PERSISTENT RESERVE OUT specify initiator ports payload, * first extract TransportID Parameter Data Length, and make sure @@ -1760,6 +1762,9 @@ static int core_scsi3_decode_spec_i_port( tid_len = 0; } + + transport_kunmap_first_data_page(cmd); + /* * Go ahead and create a registrations from tid_dest_list for the * SPEC_I_PT provided TransportID for the *tidh referenced dest_node_acl @@ -1806,6 +1811,7 @@ static int core_scsi3_decode_spec_i_port( return 0; out: + transport_kunmap_first_data_page(cmd); /* * For the failure case, release everything from tid_dest_list * including *dest_pr_reg and the configfs dependances.. @@ -3307,7 +3313,7 @@ static int core_scsi3_emulate_pro_register_and_move( struct target_core_fabric_ops *dest_tf_ops = NULL, *tf_ops; struct t10_pr_registration *pr_reg, *pr_res_holder, *dest_pr_reg; struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; - unsigned char *buf = (unsigned char *)cmd->t_task_buf; + unsigned char *buf; unsigned char *initiator_str; char *iport_ptr = NULL, dest_iport[64], i_buf[PR_REG_ISID_ID_LEN]; u32 tid_len, tmp_tid_len; @@ -3357,17 +3363,21 @@ static int core_scsi3_emulate_pro_register_and_move( core_scsi3_put_pr_reg(pr_reg); return PYX_TRANSPORT_INVALID_PARAMETER_LIST; } + /* * Determine the Relative Target Port Identifier where the reservation * will be moved to for the TransportID containing SCSI initiator WWN * information. */ + buf = transport_kmap_first_data_page(cmd); rtpi = (buf[18] & 0xff) << 8; rtpi |= buf[19] & 0xff; tid_len = (buf[20] & 0xff) << 24; tid_len |= (buf[21] & 0xff) << 16; tid_len |= (buf[22] & 0xff) << 8; tid_len |= buf[23] & 0xff; + transport_kunmap_first_data_page(cmd); + buf = NULL; if ((tid_len + 24) != cmd->data_length) { printk(KERN_ERR "SPC-3 PR: Illegal tid_len: %u + 24 byte header" @@ -3414,6 +3424,8 @@ static int core_scsi3_emulate_pro_register_and_move( core_scsi3_put_pr_reg(pr_reg); return PYX_TRANSPORT_INVALID_PARAMETER_LIST; } + + buf = transport_kmap_first_data_page(cmd); proto_ident = (buf[24] & 0x0f); #if 0 printk("SPC-3 PR REGISTER_AND_MOVE: Extracted Protocol Identifier:" @@ -3444,6 +3456,9 @@ static int core_scsi3_emulate_pro_register_and_move( goto out; } + transport_kunmap_first_data_page(cmd); + buf = NULL; + printk(KERN_INFO "SPC-3 PR [%s] Extracted initiator %s identifier: %s" " %s\n", dest_tf_ops->get_fabric_name(), (iport_ptr != NULL) ? "port" : "device", initiator_str, (iport_ptr != NULL) ? @@ -3696,9 +3711,13 @@ after_iport_check: " REGISTER_AND_MOVE\n"); } + transport_kunmap_first_data_page(cmd); + core_scsi3_put_pr_reg(dest_pr_reg); return 0; out: + if (buf) + transport_kunmap_first_data_page(cmd); if (dest_se_deve) core_scsi3_lunacl_undepend_item(dest_se_deve); if (dest_node_acl) @@ -3723,7 +3742,7 @@ static unsigned long long core_scsi3_extract_reservation_key(unsigned char *cdb) */ static int core_scsi3_emulate_pr_out(struct se_cmd *cmd, unsigned char *cdb) { - unsigned char *buf = (unsigned char *)cmd->t_task_buf; + unsigned char *buf; u64 res_key, sa_res_key; int sa, scope, type, aptpl; int spec_i_pt = 0, all_tg_pt = 0, unreg = 0; @@ -3745,6 +3764,8 @@ static int core_scsi3_emulate_pr_out(struct se_cmd *cmd, unsigned char *cdb) sa = (cdb[1] & 0x1f); scope = (cdb[2] & 0xf0); type = (cdb[2] & 0x0f); + + buf = transport_kmap_first_data_page(cmd); /* * From PERSISTENT_RESERVE_OUT parameter list (payload) */ @@ -3762,6 +3783,9 @@ static int core_scsi3_emulate_pr_out(struct se_cmd *cmd, unsigned char *cdb) aptpl = (buf[17] & 0x01); unreg = (buf[17] & 0x02); } + transport_kunmap_first_data_page(cmd); + buf = NULL; + /* * SPEC_I_PT=1 is only valid for Service action: REGISTER */ @@ -3830,7 +3854,7 @@ static int core_scsi3_pri_read_keys(struct se_cmd *cmd) struct se_device *se_dev = cmd->se_dev; struct se_subsystem_dev *su_dev = se_dev->se_sub_dev; struct t10_pr_registration *pr_reg; - unsigned char *buf = (unsigned char *)cmd->t_task_buf; + unsigned char *buf; u32 add_len = 0, off = 8; if (cmd->data_length < 8) { @@ -3839,6 +3863,7 @@ static int core_scsi3_pri_read_keys(struct se_cmd *cmd) return PYX_TRANSPORT_INVALID_CDB_FIELD; } + buf = transport_kmap_first_data_page(cmd); buf[0] = ((su_dev->t10_pr.pr_generation >> 24) & 0xff); buf[1] = ((su_dev->t10_pr.pr_generation >> 16) & 0xff); buf[2] = ((su_dev->t10_pr.pr_generation >> 8) & 0xff); @@ -3872,6 +3897,8 @@ static int core_scsi3_pri_read_keys(struct se_cmd *cmd) buf[6] = ((add_len >> 8) & 0xff); buf[7] = (add_len & 0xff); + transport_kunmap_first_data_page(cmd); + return 0; } @@ -3885,7 +3912,7 @@ static int core_scsi3_pri_read_reservation(struct se_cmd *cmd) struct se_device *se_dev = cmd->se_dev; struct se_subsystem_dev *su_dev = se_dev->se_sub_dev; struct t10_pr_registration *pr_reg; - unsigned char *buf = (unsigned char *)cmd->t_task_buf; + unsigned char *buf; u64 pr_res_key; u32 add_len = 16; /* Hardcoded to 16 when a reservation is held. */ @@ -3895,6 +3922,7 @@ static int core_scsi3_pri_read_reservation(struct se_cmd *cmd) return PYX_TRANSPORT_INVALID_CDB_FIELD; } + buf = transport_kmap_first_data_page(cmd); buf[0] = ((su_dev->t10_pr.pr_generation >> 24) & 0xff); buf[1] = ((su_dev->t10_pr.pr_generation >> 16) & 0xff); buf[2] = ((su_dev->t10_pr.pr_generation >> 8) & 0xff); @@ -3911,10 +3939,9 @@ static int core_scsi3_pri_read_reservation(struct se_cmd *cmd) buf[6] = ((add_len >> 8) & 0xff); buf[7] = (add_len & 0xff); - if (cmd->data_length < 22) { - spin_unlock(&se_dev->dev_reservation_lock); - return 0; - } + if (cmd->data_length < 22) + goto err; + /* * Set the Reservation key. * @@ -3951,7 +3978,10 @@ static int core_scsi3_pri_read_reservation(struct se_cmd *cmd) buf[21] = (pr_reg->pr_res_scope & 0xf0) | (pr_reg->pr_res_type & 0x0f); } + +err: spin_unlock(&se_dev->dev_reservation_lock); + transport_kunmap_first_data_page(cmd); return 0; } @@ -3965,7 +3995,7 @@ static int core_scsi3_pri_report_capabilities(struct se_cmd *cmd) { struct se_device *dev = cmd->se_dev; struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; - unsigned char *buf = (unsigned char *)cmd->t_task_buf; + unsigned char *buf; u16 add_len = 8; /* Hardcoded to 8. */ if (cmd->data_length < 6) { @@ -3974,6 +4004,8 @@ static int core_scsi3_pri_report_capabilities(struct se_cmd *cmd) return PYX_TRANSPORT_INVALID_CDB_FIELD; } + buf = transport_kmap_first_data_page(cmd); + buf[0] = ((add_len << 8) & 0xff); buf[1] = (add_len & 0xff); buf[2] |= 0x10; /* CRH: Compatible Reservation Hanlding bit. */ @@ -4004,6 +4036,8 @@ static int core_scsi3_pri_report_capabilities(struct se_cmd *cmd) buf[4] |= 0x02; /* PR_TYPE_WRITE_EXCLUSIVE */ buf[5] |= 0x01; /* PR_TYPE_EXCLUSIVE_ACCESS_ALLREG */ + transport_kunmap_first_data_page(cmd); + return 0; } @@ -4020,7 +4054,7 @@ static int core_scsi3_pri_read_full_status(struct se_cmd *cmd) struct se_portal_group *se_tpg; struct t10_pr_registration *pr_reg, *pr_reg_tmp; struct t10_reservation *pr_tmpl = &se_dev->se_sub_dev->t10_pr; - unsigned char *buf = (unsigned char *)cmd->t_task_buf; + unsigned char *buf; u32 add_desc_len = 0, add_len = 0, desc_len, exp_desc_len; u32 off = 8; /* off into first Full Status descriptor */ int format_code = 0; @@ -4031,6 +4065,8 @@ static int core_scsi3_pri_read_full_status(struct se_cmd *cmd) return PYX_TRANSPORT_INVALID_CDB_FIELD; } + buf = transport_kmap_first_data_page(cmd); + buf[0] = ((su_dev->t10_pr.pr_generation >> 24) & 0xff); buf[1] = ((su_dev->t10_pr.pr_generation >> 16) & 0xff); buf[2] = ((su_dev->t10_pr.pr_generation >> 8) & 0xff); @@ -4150,6 +4186,8 @@ static int core_scsi3_pri_read_full_status(struct se_cmd *cmd) buf[6] = ((add_len >> 8) & 0xff); buf[7] = (add_len & 0xff); + transport_kunmap_first_data_page(cmd); + return 0; } diff --git a/drivers/target/target_core_pscsi.c b/drivers/target/target_core_pscsi.c index 3574c520a5f4..d9569242e3dc 100644 --- a/drivers/target/target_core_pscsi.c +++ b/drivers/target/target_core_pscsi.c @@ -695,7 +695,7 @@ static int pscsi_transport_complete(struct se_task *task) if (task->task_se_cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY) { - unsigned char *buf = task->task_se_cmd->t_task_buf; + unsigned char *buf = transport_kmap_first_data_page(task->task_se_cmd); if (cdb[0] == MODE_SENSE_10) { if (!(buf[3] & 0x80)) @@ -704,6 +704,8 @@ static int pscsi_transport_complete(struct se_task *task) if (!(buf[2] & 0x80)) buf[2] |= 0x80; } + + transport_kunmap_first_data_page(task->task_se_cmd); } } after_mode_sense: @@ -1246,33 +1248,6 @@ static int pscsi_map_task_SG(struct se_task *task) return 0; } -/* pscsi_map_task_non_SG(): - * - * - */ -static int pscsi_map_task_non_SG(struct se_task *task) -{ - struct se_cmd *cmd = task->task_se_cmd; - struct pscsi_plugin_task *pt = PSCSI_TASK(task); - struct pscsi_dev_virt *pdv = task->se_dev->dev_ptr; - int ret = 0; - - if (pscsi_blk_get_request(task) < 0) - return PYX_TRANSPORT_LU_COMM_FAILURE; - - if (!task->task_size) - return 0; - - ret = blk_rq_map_kern(pdv->pdv_sd->request_queue, - pt->pscsi_req, cmd->t_task_buf, - task->task_size, GFP_KERNEL); - if (ret < 0) { - printk(KERN_ERR "PSCSI: blk_rq_map_kern() failed: %d\n", ret); - return PYX_TRANSPORT_LU_COMM_FAILURE; - } - return 0; -} - static int pscsi_CDB_none(struct se_task *task) { return pscsi_blk_get_request(task); @@ -1392,7 +1367,6 @@ static struct se_subsystem_api pscsi_template = { .owner = THIS_MODULE, .transport_type = TRANSPORT_PLUGIN_PHBA_PDEV, .cdb_none = pscsi_CDB_none, - .map_task_non_SG = pscsi_map_task_non_SG, .map_task_SG = pscsi_map_task_SG, .attach_hba = pscsi_attach_hba, .detach_hba = pscsi_detach_hba, diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c index 056c4cb4736d..c681c812dd64 100644 --- a/drivers/target/target_core_transport.c +++ b/drivers/target/target_core_transport.c @@ -213,7 +213,7 @@ static u32 transport_allocate_tasks(struct se_cmd *cmd, unsigned long long starting_lba, u32 sectors, enum dma_data_direction data_direction, struct list_head *mem_list, int set_counts); -static int transport_generic_get_mem(struct se_cmd *cmd, u32 length); +static int transport_generic_get_mem(struct se_cmd *cmd); static int transport_generic_remove(struct se_cmd *cmd, int session_reinstatement); static int transport_cmd_get_valid_sectors(struct se_cmd *cmd); @@ -2233,23 +2233,6 @@ static void transport_generic_request_timeout(struct se_cmd *cmd) transport_generic_remove(cmd, 0); } -static int -transport_generic_allocate_buf(struct se_cmd *cmd, u32 data_length) -{ - unsigned char *buf; - - buf = kzalloc(data_length, GFP_KERNEL); - if (!(buf)) { - printk(KERN_ERR "Unable to allocate memory for buffer\n"); - return -ENOMEM; - } - - cmd->t_tasks_se_num = 0; - cmd->t_task_buf = buf; - - return 0; -} - static inline u32 transport_lba_21(unsigned char *cdb) { return ((cdb[1] & 0x1f) << 16) | (cdb[2] << 8) | cdb[3]; @@ -2966,19 +2949,6 @@ static int transport_get_sense_data(struct se_cmd *cmd) return -1; } -static int transport_allocate_resources(struct se_cmd *cmd) -{ - u32 length = cmd->data_length; - - if ((cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB) || - (cmd->se_cmd_flags & SCF_SCSI_CONTROL_SG_IO_CDB)) - return transport_generic_get_mem(cmd, length); - else if (cmd->se_cmd_flags & SCF_SCSI_CONTROL_NONSG_IO_CDB) - return transport_generic_allocate_buf(cmd, length); - else - return 0; -} - static int transport_handle_reservation_conflict(struct se_cmd *cmd) { @@ -3265,7 +3235,7 @@ static int transport_generic_cmd_sequencer( /* GPCMD_SEND_KEY from multi media commands */ size = (cdb[8] << 8) + cdb[9]; } - cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB; + cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; break; case MODE_SELECT: size = cdb[4]; @@ -3277,7 +3247,7 @@ static int transport_generic_cmd_sequencer( break; case MODE_SENSE: size = cdb[4]; - cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB; + cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; break; case MODE_SENSE_10: case GPCMD_READ_BUFFER_CAPACITY: @@ -3285,11 +3255,11 @@ static int transport_generic_cmd_sequencer( case LOG_SELECT: case LOG_SENSE: size = (cdb[7] << 8) + cdb[8]; - cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB; + cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; break; case READ_BLOCK_LIMITS: size = READ_BLOCK_LEN; - cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB; + cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; break; case GPCMD_GET_CONFIGURATION: case GPCMD_READ_FORMAT_CAPACITIES: @@ -3305,7 +3275,7 @@ static int transport_generic_cmd_sequencer( SPC3_PERSISTENT_RESERVATIONS) ? core_scsi3_emulate_pr : NULL; size = (cdb[7] << 8) + cdb[8]; - cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB; + cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; break; case GPCMD_MECHANISM_STATUS: case GPCMD_READ_DVD_STRUCTURE: @@ -3314,7 +3284,7 @@ static int transport_generic_cmd_sequencer( break; case READ_POSITION: size = READ_POSITION_LEN; - cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB; + cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; break; case MAINTENANCE_OUT: if (dev->transport->get_device_type(dev) != TYPE_ROM) { @@ -3336,7 +3306,7 @@ static int transport_generic_cmd_sequencer( /* GPCMD_REPORT_KEY from multi media commands */ size = (cdb[8] << 8) + cdb[9]; } - cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB; + cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; break; case INQUIRY: size = (cdb[3] << 8) + cdb[4]; @@ -3346,21 +3316,21 @@ static int transport_generic_cmd_sequencer( */ if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) cmd->sam_task_attr = MSG_HEAD_TAG; - cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB; + cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; break; case READ_BUFFER: size = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8]; - cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB; + cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; break; case READ_CAPACITY: size = READ_CAP_LEN; - cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB; + cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; break; case READ_MEDIA_SERIAL_NUMBER: case SECURITY_PROTOCOL_IN: case SECURITY_PROTOCOL_OUT: size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; - cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB; + cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; break; case SERVICE_ACTION_IN: case ACCESS_CONTROL_IN: @@ -3371,36 +3341,36 @@ static int transport_generic_cmd_sequencer( case WRITE_ATTRIBUTE: size = (cdb[10] << 24) | (cdb[11] << 16) | (cdb[12] << 8) | cdb[13]; - cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB; + cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; break; case RECEIVE_DIAGNOSTIC: case SEND_DIAGNOSTIC: size = (cdb[3] << 8) | cdb[4]; - cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB; + cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; break; /* #warning FIXME: Figure out correct GPCMD_READ_CD blocksize. */ #if 0 case GPCMD_READ_CD: sectors = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8]; size = (2336 * sectors); - cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB; + cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; break; #endif case READ_TOC: size = cdb[8]; - cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB; + cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; break; case REQUEST_SENSE: size = cdb[4]; - cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB; + cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; break; case READ_ELEMENT_STATUS: size = 65536 * cdb[7] + 256 * cdb[8] + cdb[9]; - cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB; + cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; break; case WRITE_BUFFER: size = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8]; - cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB; + cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; break; case RESERVE: case RESERVE_10: @@ -3480,7 +3450,7 @@ static int transport_generic_cmd_sequencer( break; case UNMAP: size = get_unaligned_be16(&cdb[7]); - cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB; + cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; break; case WRITE_SAME_16: sectors = transport_get_sectors_16(cdb, cmd, §or_ret); @@ -3547,7 +3517,7 @@ static int transport_generic_cmd_sequencer( */ if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) cmd->sam_task_attr = MSG_HEAD_TAG; - cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB; + cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; break; default: printk(KERN_WARNING "TARGET_CORE[%s]: Unsupported SCSI Opcode" @@ -3804,16 +3774,6 @@ static void transport_generic_complete_ok(struct se_cmd *cmd) cmd->data_length; } spin_unlock(&cmd->se_lun->lun_sep_lock); - /* - * If enabled by TCM fabric module pre-registered SGL - * memory, perform the memcpy() from the TCM internal - * contiguous buffer back to the original SGL. - */ - if (cmd->se_cmd_flags & SCF_PASSTHROUGH_CONTIG_TO_SG) - sg_copy_from_buffer(cmd->t_task_pt_sgl, - cmd->t_task_pt_sgl_num, - cmd->t_task_buf, - cmd->data_length); ret = cmd->se_tfo->queue_data_in(cmd); if (ret == -EAGAIN) @@ -3899,12 +3859,6 @@ static inline void transport_free_pages(struct se_cmd *cmd) if (cmd->se_dev->transport->do_se_mem_map) free_page = 0; - if (cmd->t_task_buf) { - kfree(cmd->t_task_buf); - cmd->t_task_buf = NULL; - return; - } - list_for_each_entry_safe(se_mem, se_mem_tmp, &cmd->t_mem_list, se_list) { /* @@ -4068,25 +4022,6 @@ int transport_generic_map_mem_to_cmd( cmd->t_tasks_se_bidi_num = ret; } cmd->se_cmd_flags |= SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; - - } else if (cmd->se_cmd_flags & SCF_SCSI_CONTROL_NONSG_IO_CDB) { - if (sgl_bidi || sgl_bidi_count) { - printk(KERN_ERR "BIDI-Commands not supported using " - "SCF_SCSI_CONTROL_NONSG_IO_CDB\n"); - return -ENOSYS; - } - /* - * For incoming CDBs using a contiguous buffer internal with TCM, - * save the passed struct scatterlist memory. After TCM storage object - * processing has completed for this struct se_cmd, TCM core will call - * transport_memcpy_[write,read]_contig() as necessary from - * transport_generic_complete_ok() and transport_write_pending() in order - * to copy the TCM buffer to/from the original passed *mem in SGL -> - * struct scatterlist format. - */ - cmd->se_cmd_flags |= SCF_PASSTHROUGH_CONTIG_TO_SG; - cmd->t_task_pt_sgl = sgl; - cmd->t_task_pt_sgl_num = sgl_count; } return 0; @@ -4184,10 +4119,41 @@ static int transport_new_cmd_obj(struct se_cmd *cmd) return 0; } +void *transport_kmap_first_data_page(struct se_cmd *cmd) +{ + struct se_mem *se_mem; + + BUG_ON(list_empty(&cmd->t_mem_list)); + + se_mem = list_first_entry(&cmd->t_mem_list, struct se_mem, se_list); + + /* + * 1st se_mem should point to a page, and we shouldn't need more than + * that for this cmd + */ + BUG_ON(cmd->data_length > PAGE_SIZE); + + return kmap(se_mem->se_page); +} +EXPORT_SYMBOL(transport_kmap_first_data_page); + +void transport_kunmap_first_data_page(struct se_cmd *cmd) +{ + struct se_mem *se_mem; + + BUG_ON(list_empty(&cmd->t_mem_list)); + + se_mem = list_first_entry(&cmd->t_mem_list, struct se_mem, se_list); + + kunmap(se_mem->se_page); +} +EXPORT_SYMBOL(transport_kunmap_first_data_page); + static int -transport_generic_get_mem(struct se_cmd *cmd, u32 length) +transport_generic_get_mem(struct se_cmd *cmd) { struct se_mem *se_mem; + int length = cmd->data_length; /* * If the device uses memory mapping this is enough. @@ -4195,6 +4161,7 @@ transport_generic_get_mem(struct se_cmd *cmd, u32 length) if (cmd->se_dev->transport->do_se_mem_map) return 0; + /* Even cmds with length 0 will get here, btw */ while (length) { se_mem = kmem_cache_zalloc(se_mem_cache, GFP_KERNEL); if (!(se_mem)) { @@ -4851,10 +4818,6 @@ transport_map_control_cmd_to_task(struct se_cmd *cmd) if (dev->transport->map_task_SG) return dev->transport->map_task_SG(task); return 0; - } else if (cmd->se_cmd_flags & SCF_SCSI_CONTROL_NONSG_IO_CDB) { - if (dev->transport->map_task_non_SG) - return dev->transport->map_task_non_SG(task); - return 0; } else if (cmd->se_cmd_flags & SCF_SCSI_NON_DATA_CDB) { if (dev->transport->cdb_none) return dev->transport->cdb_none(task); @@ -4887,7 +4850,7 @@ int transport_generic_new_cmd(struct se_cmd *cmd) * cmd->t_mem_list of struct se_mem->se_page */ if (!(cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC)) { - ret = transport_allocate_resources(cmd); + ret = transport_generic_get_mem(cmd); if (ret < 0) return ret; } @@ -5029,17 +4992,7 @@ static int transport_generic_write_pending(struct se_cmd *cmd) cmd->transport_qf_callback = NULL; return 0; } - /* - * For the TCM control CDBs using a contiguous buffer, do the memcpy - * from the passed Linux/SCSI struct scatterlist located at - * se_cmd->t_task_pt_sgl to the contiguous buffer at - * se_cmd->t_task_buf. - */ - if (cmd->se_cmd_flags & SCF_PASSTHROUGH_CONTIG_TO_SG) - sg_copy_to_buffer(cmd->t_task_pt_sgl, - cmd->t_task_pt_sgl_num, - cmd->t_task_buf, - cmd->data_length); + /* * Clear the se_cmd for WRITE_PENDING status in order to set * cmd->t_transport_active=0 so that transport_generic_handle_data diff --git a/drivers/target/tcm_fc/tfc_cmd.c b/drivers/target/tcm_fc/tfc_cmd.c index a00951c80324..1017f56bbbcc 100644 --- a/drivers/target/tcm_fc/tfc_cmd.c +++ b/drivers/target/tcm_fc/tfc_cmd.c @@ -71,9 +71,9 @@ void ft_dump_cmd(struct ft_cmd *cmd, const char *caller) caller, cmd, cmd->cdb); printk(KERN_INFO "%s: cmd %p lun %d\n", caller, cmd, cmd->lun); - printk(KERN_INFO "%s: cmd %p se_num %u buf %p len %u se_cmd_flags <0x%x>\n", + printk(KERN_INFO "%s: cmd %p se_num %u len %u se_cmd_flags <0x%x>\n", caller, cmd, se_cmd->t_tasks_se_num, - se_cmd->t_task_buf, se_cmd->data_length, se_cmd->se_cmd_flags); + se_cmd->data_length, se_cmd->se_cmd_flags); list_for_each_entry(mem, &se_cmd->t_mem_list, se_list) printk(KERN_INFO "%s: cmd %p mem %p page %p " diff --git a/drivers/target/tcm_fc/tfc_io.c b/drivers/target/tcm_fc/tfc_io.c index 8560182f0dad..837660728563 100644 --- a/drivers/target/tcm_fc/tfc_io.c +++ b/drivers/target/tcm_fc/tfc_io.c @@ -92,19 +92,15 @@ int ft_queue_data_in(struct se_cmd *se_cmd) remaining = se_cmd->data_length; /* - * Setup to use first mem list entry if any. + * Setup to use first mem list entry, unless no data. */ - if (se_cmd->t_tasks_se_num) { + BUG_ON(remaining && list_empty(&se_cmd->t_mem_list)); + if (remaining) { mem = list_first_entry(&se_cmd->t_mem_list, struct se_mem, se_list); mem_len = mem->se_len; mem_off = mem->se_off; page = mem->se_page; - } else { - mem = NULL; - mem_len = remaining; - mem_off = 0; - page = NULL; } /* no scatter/gather in skb for odd word length due to fc_seq_send() */ @@ -145,18 +141,7 @@ int ft_queue_data_in(struct se_cmd *se_cmd) tlen = min(mem_len, frame_len); if (use_sg) { - if (!mem) { - BUG_ON(!se_cmd->t_task_buf); - page_addr = se_cmd->t_task_buf + mem_off; - /* - * In this case, offset is 'offset_in_page' of - * (t_task_buf + mem_off) instead of 'mem_off'. - */ - off_in_page = offset_in_page(page_addr); - page = virt_to_page(page_addr); - tlen = min(tlen, PAGE_SIZE - off_in_page); - } else - off_in_page = mem_off; + off_in_page = mem_off; BUG_ON(!page); get_page(page); skb_fill_page_desc(fp_skb(fp), @@ -166,7 +151,7 @@ int ft_queue_data_in(struct se_cmd *se_cmd) fp_skb(fp)->data_len += tlen; fp_skb(fp)->truesize += PAGE_SIZE << compound_order(page); - } else if (mem) { + } else { BUG_ON(!page); from = kmap_atomic(page + (mem_off >> PAGE_SHIFT), KM_SOFTIRQ0); @@ -177,10 +162,6 @@ int ft_queue_data_in(struct se_cmd *se_cmd) memcpy(to, from, tlen); kunmap_atomic(page_addr, KM_SOFTIRQ0); to += tlen; - } else { - from = se_cmd->t_task_buf + mem_off; - memcpy(to, from, tlen); - to += tlen; } mem_off += tlen; @@ -305,19 +286,15 @@ void ft_recv_write_data(struct ft_cmd *cmd, struct fc_frame *fp) frame_len = se_cmd->data_length - rel_off; /* - * Setup to use first mem list entry if any. + * Setup to use first mem list entry, unless no data. */ - if (se_cmd->t_tasks_se_num) { + BUG_ON(frame_len && list_empty(&se_cmd->t_mem_list)); + if (frame_len) { mem = list_first_entry(&se_cmd->t_mem_list, struct se_mem, se_list); mem_len = mem->se_len; mem_off = mem->se_off; page = mem->se_page; - } else { - mem = NULL; - page = NULL; - mem_off = 0; - mem_len = frame_len; } while (frame_len) { @@ -340,19 +317,15 @@ void ft_recv_write_data(struct ft_cmd *cmd, struct fc_frame *fp) tlen = min(mem_len, frame_len); - if (mem) { - to = kmap_atomic(page + (mem_off >> PAGE_SHIFT), - KM_SOFTIRQ0); - page_addr = to; - to += mem_off & ~PAGE_MASK; - tlen = min(tlen, (size_t)(PAGE_SIZE - - (mem_off & ~PAGE_MASK))); - memcpy(to, from, tlen); - kunmap_atomic(page_addr, KM_SOFTIRQ0); - } else { - to = se_cmd->t_task_buf + mem_off; - memcpy(to, from, tlen); - } + to = kmap_atomic(page + (mem_off >> PAGE_SHIFT), + KM_SOFTIRQ0); + page_addr = to; + to += mem_off & ~PAGE_MASK; + tlen = min(tlen, (size_t)(PAGE_SIZE - + (mem_off & ~PAGE_MASK))); + memcpy(to, from, tlen); + kunmap_atomic(page_addr, KM_SOFTIRQ0); + from += tlen; frame_len -= tlen; mem_off += tlen; |