diff options
Diffstat (limited to 'drivers/target/sbp')
-rw-r--r-- | drivers/target/sbp/sbp_target.c | 275 | ||||
-rw-r--r-- | drivers/target/sbp/sbp_target.h | 11 |
2 files changed, 54 insertions, 232 deletions
diff --git a/drivers/target/sbp/sbp_target.c b/drivers/target/sbp/sbp_target.c index ce81f17ad1ba..0edf320fb685 100644 --- a/drivers/target/sbp/sbp_target.c +++ b/drivers/target/sbp/sbp_target.c @@ -36,7 +36,6 @@ #include <target/target_core_backend.h> #include <target/target_core_fabric.h> #include <target/target_core_fabric_configfs.h> -#include <target/target_core_configfs.h> #include <target/configfs_macros.h> #include <asm/unaligned.h> @@ -109,13 +108,13 @@ static struct sbp_session *sbp_session_find_by_guid( } static struct sbp_login_descriptor *sbp_login_find_by_lun( - struct sbp_session *session, struct se_lun *lun) + struct sbp_session *session, u32 unpacked_lun) { struct sbp_login_descriptor *login, *found = NULL; spin_lock_bh(&session->lock); list_for_each_entry(login, &session->login_list, link) { - if (login->lun == lun) + if (login->login_lun == unpacked_lun) found = login; } spin_unlock_bh(&session->lock); @@ -125,7 +124,7 @@ static struct sbp_login_descriptor *sbp_login_find_by_lun( static int sbp_login_count_all_by_lun( struct sbp_tpg *tpg, - struct se_lun *lun, + u32 unpacked_lun, int exclusive) { struct se_session *se_sess; @@ -139,7 +138,7 @@ static int sbp_login_count_all_by_lun( spin_lock_bh(&sess->lock); list_for_each_entry(login, &sess->login_list, link) { - if (login->lun != lun) + if (login->login_lun != unpacked_lun) continue; if (!exclusive || login->exclusive) @@ -175,23 +174,23 @@ static struct sbp_login_descriptor *sbp_login_find_by_id( return found; } -static struct se_lun *sbp_get_lun_from_tpg(struct sbp_tpg *tpg, int lun) +static u32 sbp_get_lun_from_tpg(struct sbp_tpg *tpg, u32 login_lun, int *err) { struct se_portal_group *se_tpg = &tpg->se_tpg; struct se_lun *se_lun; - if (lun >= TRANSPORT_MAX_LUNS_PER_TPG) - return ERR_PTR(-EINVAL); - - spin_lock(&se_tpg->tpg_lun_lock); - se_lun = se_tpg->tpg_lun_list[lun]; - - if (se_lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) - se_lun = ERR_PTR(-ENODEV); - - spin_unlock(&se_tpg->tpg_lun_lock); + rcu_read_lock(); + hlist_for_each_entry_rcu(se_lun, &se_tpg->tpg_lun_hlist, link) { + if (se_lun->unpacked_lun == login_lun) { + rcu_read_unlock(); + *err = 0; + return login_lun; + } + } + rcu_read_unlock(); - return se_lun; + *err = -ENODEV; + return login_lun; } static struct sbp_session *sbp_session_create( @@ -295,17 +294,16 @@ static void sbp_management_request_login( { struct sbp_tport *tport = agent->tport; struct sbp_tpg *tpg = tport->tpg; - struct se_lun *se_lun; - int ret; - u64 guid; struct sbp_session *sess; struct sbp_login_descriptor *login; struct sbp_login_response_block *response; - int login_response_len; + u64 guid; + u32 unpacked_lun; + int login_response_len, ret; - se_lun = sbp_get_lun_from_tpg(tpg, - LOGIN_ORB_LUN(be32_to_cpu(req->orb.misc))); - if (IS_ERR(se_lun)) { + unpacked_lun = sbp_get_lun_from_tpg(tpg, + LOGIN_ORB_LUN(be32_to_cpu(req->orb.misc)), &ret); + if (ret) { pr_notice("login to unknown LUN: %d\n", LOGIN_ORB_LUN(be32_to_cpu(req->orb.misc))); @@ -326,11 +324,11 @@ static void sbp_management_request_login( } pr_notice("mgt_agent LOGIN to LUN %d from %016llx\n", - se_lun->unpacked_lun, guid); + unpacked_lun, guid); sess = sbp_session_find_by_guid(tpg, guid); if (sess) { - login = sbp_login_find_by_lun(sess, se_lun); + login = sbp_login_find_by_lun(sess, unpacked_lun); if (login) { pr_notice("initiator already logged-in\n"); @@ -358,7 +356,7 @@ static void sbp_management_request_login( * reject with access_denied if any logins present */ if (LOGIN_ORB_EXCLUSIVE(be32_to_cpu(req->orb.misc)) && - sbp_login_count_all_by_lun(tpg, se_lun, 0)) { + sbp_login_count_all_by_lun(tpg, unpacked_lun, 0)) { pr_warn("refusing exclusive login with other active logins\n"); req->status.status = cpu_to_be32( @@ -371,7 +369,7 @@ static void sbp_management_request_login( * check exclusive bit in any existing login descriptor * reject with access_denied if any exclusive logins present */ - if (sbp_login_count_all_by_lun(tpg, se_lun, 1)) { + if (sbp_login_count_all_by_lun(tpg, unpacked_lun, 1)) { pr_warn("refusing login while another exclusive login present\n"); req->status.status = cpu_to_be32( @@ -384,7 +382,7 @@ static void sbp_management_request_login( * check we haven't exceeded the number of allowed logins * reject with resources_unavailable if we have */ - if (sbp_login_count_all_by_lun(tpg, se_lun, 0) >= + if (sbp_login_count_all_by_lun(tpg, unpacked_lun, 0) >= tport->max_logins_per_lun) { pr_warn("max number of logins reached\n"); @@ -440,7 +438,7 @@ static void sbp_management_request_login( } login->sess = sess; - login->lun = se_lun; + login->login_lun = unpacked_lun; login->status_fifo_addr = sbp2_pointer_to_addr(&req->orb.status_fifo); login->exclusive = LOGIN_ORB_EXCLUSIVE(be32_to_cpu(req->orb.misc)); login->login_id = atomic_inc_return(&login_id); @@ -602,7 +600,7 @@ static void sbp_management_request_logout( } pr_info("mgt_agent LOGOUT from LUN %d session %d\n", - login->lun->unpacked_lun, login->login_id); + login->login_lun, login->login_id); if (req->node_addr != login->sess->node_id) { pr_warn("logout from different node ID\n"); @@ -1228,12 +1226,14 @@ static void sbp_handle_command(struct sbp_target_request *req) goto err; } - unpacked_lun = req->login->lun->unpacked_lun; + unpacked_lun = req->login->login_lun; sbp_calc_data_length_direction(req, &data_length, &data_dir); pr_debug("sbp_handle_command ORB:0x%llx unpacked_lun:%d data_len:%d data_dir:%d\n", req->orb_pointer, unpacked_lun, data_length, data_dir); + /* only used for printk until we do TMRs */ + req->se_cmd.tag = req->orb_pointer; if (target_submit_cmd(&req->se_cmd, sess->se_sess, req->cmd_buf, req->sense_buf, unpacked_lun, data_length, TCM_SIMPLE_TAG, data_dir, 0)) @@ -1707,33 +1707,6 @@ static u16 sbp_get_tag(struct se_portal_group *se_tpg) return tpg->tport_tpgt; } -static u32 sbp_get_default_depth(struct se_portal_group *se_tpg) -{ - return 1; -} - -static struct se_node_acl *sbp_alloc_fabric_acl(struct se_portal_group *se_tpg) -{ - struct sbp_nacl *nacl; - - nacl = kzalloc(sizeof(struct sbp_nacl), GFP_KERNEL); - if (!nacl) { - pr_err("Unable to allocate struct sbp_nacl\n"); - return NULL; - } - - return &nacl->se_node_acl; -} - -static void sbp_release_fabric_acl( - struct se_portal_group *se_tpg, - struct se_node_acl *se_nacl) -{ - struct sbp_nacl *nacl = - container_of(se_nacl, struct sbp_nacl, se_node_acl); - kfree(nacl); -} - static u32 sbp_tpg_get_inst_index(struct se_portal_group *se_tpg) { return 1; @@ -1795,15 +1768,6 @@ static void sbp_set_default_node_attrs(struct se_node_acl *nacl) return; } -static u32 sbp_get_task_tag(struct se_cmd *se_cmd) -{ - struct sbp_target_request *req = container_of(se_cmd, - struct sbp_target_request, se_cmd); - - /* only used for printk until we do TMRs */ - return (u32)req->orb_pointer; -} - static int sbp_get_cmd_state(struct se_cmd *se_cmd) { return 0; @@ -1859,106 +1823,23 @@ static int sbp_check_stop_free(struct se_cmd *se_cmd) return 1; } -/* - * Handlers for Serial Bus Protocol 2/3 (SBP-2 / SBP-3) - */ -static u8 sbp_get_fabric_proto_ident(struct se_portal_group *se_tpg) -{ - /* - * Return a IEEE 1394 SCSI Protocol identifier for loopback operations - * This is defined in section 7.5.1 Table 362 in spc4r17 - */ - return SCSI_PROTOCOL_SBP; -} - -static u32 sbp_get_pr_transport_id( - struct se_portal_group *se_tpg, - struct se_node_acl *se_nacl, - struct t10_pr_registration *pr_reg, - int *format_code, - unsigned char *buf) -{ - int ret; - - /* - * Set PROTOCOL IDENTIFIER to 3h for SBP - */ - buf[0] = SCSI_PROTOCOL_SBP; - /* - * From spc4r17, 7.5.4.4 TransportID for initiator ports using SCSI - * over IEEE 1394 - */ - ret = hex2bin(&buf[8], se_nacl->initiatorname, 8); - if (ret < 0) - pr_debug("sbp transport_id: invalid hex string\n"); - - /* - * The IEEE 1394 Transport ID is a hardcoded 24-byte length - */ - return 24; -} - -static u32 sbp_get_pr_transport_id_len( - struct se_portal_group *se_tpg, - struct se_node_acl *se_nacl, - struct t10_pr_registration *pr_reg, - int *format_code) -{ - *format_code = 0; - /* - * From spc4r17, 7.5.4.4 TransportID for initiator ports using SCSI - * over IEEE 1394 - * - * The SBP Transport ID is a hardcoded 24-byte length - */ - return 24; -} - -/* - * Used for handling SCSI fabric dependent TransportIDs in SPC-3 and above - * Persistent Reservation SPEC_I_PT=1 and PROUT REGISTER_AND_MOVE operations. - */ -static char *sbp_parse_pr_out_transport_id( - struct se_portal_group *se_tpg, - const char *buf, - u32 *out_tid_len, - char **port_nexus_ptr) -{ - /* - * Assume the FORMAT CODE 00b from spc4r17, 7.5.4.4 TransportID - * for initiator ports using SCSI over SBP Serial SCSI Protocol - * - * The TransportID for a IEEE 1394 Initiator Port is of fixed size of - * 24 bytes, and IEEE 1394 does not contain a I_T nexus identifier, - * so we return the **port_nexus_ptr set to NULL. - */ - *port_nexus_ptr = NULL; - *out_tid_len = 24; - - return (char *)&buf[8]; -} - static int sbp_count_se_tpg_luns(struct se_portal_group *tpg) { - int i, count = 0; - - spin_lock(&tpg->tpg_lun_lock); - for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { - struct se_lun *se_lun = tpg->tpg_lun_list[i]; - - if (se_lun->lun_status == TRANSPORT_LUN_STATUS_FREE) - continue; + struct se_lun *lun; + int count = 0; + rcu_read_lock(); + hlist_for_each_entry_rcu(lun, &tpg->tpg_lun_hlist, link) count++; - } - spin_unlock(&tpg->tpg_lun_lock); + rcu_read_unlock(); return count; } static int sbp_update_unit_directory(struct sbp_tport *tport) { - int num_luns, num_entries, idx = 0, mgt_agt_addr, ret, i; + struct se_lun *lun; + int num_luns, num_entries, idx = 0, mgt_agt_addr, ret; u32 *data; if (tport->unit_directory.data) { @@ -2020,28 +1901,23 @@ static int sbp_update_unit_directory(struct sbp_tport *tport) /* unit unique ID (leaf is just after LUNs) */ data[idx++] = 0x8d000000 | (num_luns + 1); - spin_lock(&tport->tpg->se_tpg.tpg_lun_lock); - for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { - struct se_lun *se_lun = tport->tpg->se_tpg.tpg_lun_list[i]; + rcu_read_lock(); + hlist_for_each_entry_rcu(lun, &tport->tpg->se_tpg.tpg_lun_hlist, link) { struct se_device *dev; int type; - - if (se_lun->lun_status == TRANSPORT_LUN_STATUS_FREE) - continue; - - spin_unlock(&tport->tpg->se_tpg.tpg_lun_lock); - - dev = se_lun->lun_se_dev; + /* + * rcu_dereference_raw protected by se_lun->lun_group symlink + * reference to se_device->dev_group. + */ + dev = rcu_dereference_raw(lun->lun_se_dev); type = dev->transport->get_device_type(dev); /* logical_unit_number */ data[idx++] = 0x14000000 | ((type << 16) & 0x1f0000) | - (se_lun->unpacked_lun & 0xffff); - - spin_lock(&tport->tpg->se_tpg.tpg_lun_lock); + (lun->unpacked_lun & 0xffff); } - spin_unlock(&tport->tpg->se_tpg.tpg_lun_lock); + rcu_read_unlock(); /* unit unique ID leaf */ data[idx++] = 2 << 16; @@ -2100,48 +1976,13 @@ static ssize_t sbp_format_wwn(char *buf, size_t len, u64 wwn) return snprintf(buf, len, "%016llx", wwn); } -static struct se_node_acl *sbp_make_nodeacl( - struct se_portal_group *se_tpg, - struct config_group *group, - const char *name) +static int sbp_init_nodeacl(struct se_node_acl *se_nacl, const char *name) { - struct se_node_acl *se_nacl, *se_nacl_new; - struct sbp_nacl *nacl; u64 guid = 0; - u32 nexus_depth = 1; if (sbp_parse_wwn(name, &guid) < 0) - return ERR_PTR(-EINVAL); - - se_nacl_new = sbp_alloc_fabric_acl(se_tpg); - if (!se_nacl_new) - return ERR_PTR(-ENOMEM); - - /* - * se_nacl_new may be released by core_tpg_add_initiator_node_acl() - * when converting a NodeACL from demo mode -> explict - */ - se_nacl = core_tpg_add_initiator_node_acl(se_tpg, se_nacl_new, - name, nexus_depth); - if (IS_ERR(se_nacl)) { - sbp_release_fabric_acl(se_tpg, se_nacl_new); - return se_nacl; - } - - nacl = container_of(se_nacl, struct sbp_nacl, se_node_acl); - nacl->guid = guid; - sbp_format_wwn(nacl->iport_name, SBP_NAMELEN, guid); - - return se_nacl; -} - -static void sbp_drop_nodeacl(struct se_node_acl *se_acl) -{ - struct sbp_nacl *nacl = - container_of(se_acl, struct sbp_nacl, se_node_acl); - - core_tpg_del_initiator_node_acl(se_acl->se_tpg, se_acl, 1); - kfree(nacl); + return -EINVAL; + return 0; } static int sbp_post_link_lun( @@ -2214,8 +2055,7 @@ static struct se_portal_group *sbp_make_tpg( goto out_free_tpg; } - ret = core_tpg_register(&sbp_ops, wwn, &tpg->se_tpg, tpg, - TRANSPORT_TPG_TYPE_NORMAL); + ret = core_tpg_register(wwn, &tpg->se_tpg, SCSI_PROTOCOL_SBP); if (ret < 0) goto out_unreg_mgt_agt; @@ -2505,19 +2345,12 @@ static const struct target_core_fabric_ops sbp_ops = { .module = THIS_MODULE, .name = "sbp", .get_fabric_name = sbp_get_fabric_name, - .get_fabric_proto_ident = sbp_get_fabric_proto_ident, .tpg_get_wwn = sbp_get_fabric_wwn, .tpg_get_tag = sbp_get_tag, - .tpg_get_default_depth = sbp_get_default_depth, - .tpg_get_pr_transport_id = sbp_get_pr_transport_id, - .tpg_get_pr_transport_id_len = sbp_get_pr_transport_id_len, - .tpg_parse_pr_out_transport_id = sbp_parse_pr_out_transport_id, .tpg_check_demo_mode = sbp_check_true, .tpg_check_demo_mode_cache = sbp_check_true, .tpg_check_demo_mode_write_protect = sbp_check_false, .tpg_check_prod_mode_write_protect = sbp_check_false, - .tpg_alloc_fabric_acl = sbp_alloc_fabric_acl, - .tpg_release_fabric_acl = sbp_release_fabric_acl, .tpg_get_inst_index = sbp_tpg_get_inst_index, .release_cmd = sbp_release_cmd, .shutdown_session = sbp_shutdown_session, @@ -2526,7 +2359,6 @@ static const struct target_core_fabric_ops sbp_ops = { .write_pending = sbp_write_pending, .write_pending_status = sbp_write_pending_status, .set_default_node_attributes = sbp_set_default_node_attrs, - .get_task_tag = sbp_get_task_tag, .get_cmd_state = sbp_get_cmd_state, .queue_data_in = sbp_queue_data_in, .queue_status = sbp_queue_status, @@ -2542,8 +2374,7 @@ static const struct target_core_fabric_ops sbp_ops = { .fabric_pre_unlink = sbp_pre_unlink_lun, .fabric_make_np = NULL, .fabric_drop_np = NULL, - .fabric_make_nodeacl = sbp_make_nodeacl, - .fabric_drop_nodeacl = sbp_drop_nodeacl, + .fabric_init_nodeacl = sbp_init_nodeacl, .tfc_wwn_attrs = sbp_wwn_attrs, .tfc_tpg_base_attrs = sbp_tpg_base_attrs, diff --git a/drivers/target/sbp/sbp_target.h b/drivers/target/sbp/sbp_target.h index 6d0d74a2c545..73bcb1208832 100644 --- a/drivers/target/sbp/sbp_target.h +++ b/drivers/target/sbp/sbp_target.h @@ -125,7 +125,7 @@ struct sbp_login_descriptor { struct sbp_session *sess; struct list_head link; - struct se_lun *lun; + u32 login_lun; u64 status_fifo_addr; int exclusive; @@ -151,15 +151,6 @@ struct sbp_session { u64 reconnect_expires; }; -struct sbp_nacl { - /* Initiator EUI-64 */ - u64 guid; - /* ASCII formatted GUID for SBP Initiator port */ - char iport_name[SBP_NAMELEN]; - /* Returned by sbp_make_nodeacl() */ - struct se_node_acl se_node_acl; -}; - struct sbp_tpg { /* Target portal group tag for TCM */ u16 tport_tpgt; |