From d977f4377fbc396b888e12fdb3b13118b09ca7db Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Wed, 10 Oct 2012 17:37:15 -0400 Subject: [PATCH] target: simplify reservations code We do not support host-level reservations for the pscsi backend, and all virtual backends are newere than SCSI-2, so just make the combined SPC-3 + SCSI-2 support the only supported variant and kill the switches for the different implementations, given that this code handles the no-op version just fine. (hch: Update DRF_SPC2_RESERVATIONS lock usage) Signed-off-by: Christoph Hellwig --- drivers/target/target_core_configfs.c | 158 +++++++------------- drivers/target/target_core_device.c | 3 - drivers/target/target_core_pr.c | 192 ++++++++----------------- drivers/target/target_core_pr.h | 2 +- drivers/target/target_core_spc.c | 19 +-- drivers/target/target_core_transport.c | 22 +-- include/target/target_core_base.h | 29 ---- 7 files changed, 127 insertions(+), 298 deletions(-) diff --git a/drivers/target/target_core_configfs.c b/drivers/target/target_core_configfs.c index 7272016ed05f..3d5570da41eb 100644 --- a/drivers/target/target_core_configfs.c +++ b/drivers/target/target_core_configfs.c @@ -970,13 +970,8 @@ static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \ __CONFIGFS_EATTR_RO(_name, \ target_core_dev_pr_show_attr_##_name); -/* - * res_holder - */ -static ssize_t target_core_dev_pr_show_spc3_res( - struct se_device *dev, - char *page, - ssize_t *len) +static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev, + char *page) { struct se_node_acl *se_nacl; struct t10_pr_registration *pr_reg; @@ -985,68 +980,52 @@ static ssize_t target_core_dev_pr_show_spc3_res( memset(i_buf, 0, PR_REG_ISID_ID_LEN); - spin_lock(&dev->dev_reservation_lock); pr_reg = dev->dev_pr_res_holder; - if (!pr_reg) { - *len += sprintf(page + *len, "No SPC-3 Reservation holder\n"); - spin_unlock(&dev->dev_reservation_lock); - return *len; - } + if (!pr_reg) + return sprintf(page, "No SPC-3 Reservation holder\n"); + se_nacl = pr_reg->pr_reg_nacl; prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], PR_REG_ISID_ID_LEN); - *len += sprintf(page + *len, "SPC-3 Reservation: %s Initiator: %s%s\n", + return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n", se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), se_nacl->initiatorname, (prf_isid) ? &i_buf[0] : ""); - spin_unlock(&dev->dev_reservation_lock); - - return *len; } -static ssize_t target_core_dev_pr_show_spc2_res( - struct se_device *dev, - char *page, - ssize_t *len) +static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev, + char *page) { struct se_node_acl *se_nacl; + ssize_t len; - spin_lock(&dev->dev_reservation_lock); se_nacl = dev->dev_reserved_node_acl; - if (!se_nacl) { - *len += sprintf(page + *len, "No SPC-2 Reservation holder\n"); - spin_unlock(&dev->dev_reservation_lock); - return *len; + if (se_nacl) { + len = sprintf(page, + "SPC-2 Reservation: %s Initiator: %s\n", + se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), + se_nacl->initiatorname); + } else { + len = sprintf(page, "No SPC-2 Reservation holder\n"); } - *len += sprintf(page + *len, "SPC-2 Reservation: %s Initiator: %s\n", - se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), - se_nacl->initiatorname); - spin_unlock(&dev->dev_reservation_lock); - - return *len; + return len; } static ssize_t target_core_dev_pr_show_attr_res_holder(struct se_device *dev, char *page) { - ssize_t len = 0; + int ret; - switch (dev->t10_pr.res_type) { - case SPC3_PERSISTENT_RESERVATIONS: - target_core_dev_pr_show_spc3_res(dev, page, &len); - break; - case SPC2_RESERVATIONS: - target_core_dev_pr_show_spc2_res(dev, page, &len); - break; - case SPC_PASSTHROUGH: - len += sprintf(page+len, "Passthrough\n"); - break; - default: - len += sprintf(page+len, "Unknown\n"); - break; - } + if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) + return sprintf(page, "Passthrough\n"); - return len; + spin_lock(&dev->dev_reservation_lock); + if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) + ret = target_core_dev_pr_show_spc2_res(dev, page); + else + ret = target_core_dev_pr_show_spc3_res(dev, page); + spin_unlock(&dev->dev_reservation_lock); + return ret; } SE_DEV_PR_ATTR_RO(res_holder); @@ -1054,31 +1033,20 @@ SE_DEV_PR_ATTR_RO(res_holder); static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts( struct se_device *dev, char *page) { - struct t10_pr_registration *pr_reg; ssize_t len = 0; - if (dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS) - return len; - spin_lock(&dev->dev_reservation_lock); - pr_reg = dev->dev_pr_res_holder; - if (!pr_reg) { + if (!dev->dev_pr_res_holder) { len = sprintf(page, "No SPC-3 Reservation holder\n"); - spin_unlock(&dev->dev_reservation_lock); - return len; - } - /* - * See All Target Ports (ALL_TG_PT) bit in spcr17, section 6.14.3 - * Basic PERSISTENT RESERVER OUT parameter list, page 290 - */ - if (pr_reg->pr_reg_all_tg_pt) + } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) { len = sprintf(page, "SPC-3 Reservation: All Target" " Ports registration\n"); - else + } else { len = sprintf(page, "SPC-3 Reservation: Single" " Target Port registration\n"); - spin_unlock(&dev->dev_reservation_lock); + } + spin_unlock(&dev->dev_reservation_lock); return len; } @@ -1087,9 +1055,6 @@ SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts); static ssize_t target_core_dev_pr_show_attr_res_pr_generation( struct se_device *dev, char *page) { - if (dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS) - return 0; - return sprintf(page, "0x%08x\n", dev->t10_pr.pr_generation); } @@ -1108,16 +1073,13 @@ static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port( struct target_core_fabric_ops *tfo; ssize_t len = 0; - if (dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS) - return len; - spin_lock(&dev->dev_reservation_lock); pr_reg = dev->dev_pr_res_holder; if (!pr_reg) { len = sprintf(page, "No SPC-3 Reservation holder\n"); - spin_unlock(&dev->dev_reservation_lock); - return len; + goto out_unlock; } + se_nacl = pr_reg->pr_reg_nacl; se_tpg = se_nacl->se_tpg; lun = pr_reg->pr_reg_tg_pt_lun; @@ -1131,8 +1093,9 @@ static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port( " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi, tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg), tfo->get_fabric_name(), lun->unpacked_lun); - spin_unlock(&dev->dev_reservation_lock); +out_unlock: + spin_unlock(&dev->dev_reservation_lock); return len; } @@ -1148,9 +1111,6 @@ static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts( ssize_t len = 0; int reg_count = 0, prf_isid; - if (dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS) - return len; - len += sprintf(page+len, "SPC-3 PR Registrations:\n"); spin_lock(&dev->t10_pr.registration_lock); @@ -1190,20 +1150,16 @@ static ssize_t target_core_dev_pr_show_attr_res_pr_type( struct t10_pr_registration *pr_reg; ssize_t len = 0; - if (dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS) - return len; - spin_lock(&dev->dev_reservation_lock); pr_reg = dev->dev_pr_res_holder; - if (!pr_reg) { + if (pr_reg) { + len = sprintf(page, "SPC-3 Reservation Type: %s\n", + core_scsi3_pr_dump_type(pr_reg->pr_res_type)); + } else { len = sprintf(page, "No SPC-3 Reservation holder\n"); - spin_unlock(&dev->dev_reservation_lock); - return len; } - len = sprintf(page, "SPC-3 Reservation Type: %s\n", - core_scsi3_pr_dump_type(pr_reg->pr_res_type)); - spin_unlock(&dev->dev_reservation_lock); + spin_unlock(&dev->dev_reservation_lock); return len; } @@ -1212,24 +1168,12 @@ SE_DEV_PR_ATTR_RO(res_pr_type); static ssize_t target_core_dev_pr_show_attr_res_type( struct se_device *dev, char *page) { - ssize_t len = 0; - - switch (dev->t10_pr.res_type) { - case SPC3_PERSISTENT_RESERVATIONS: - len = sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n"); - break; - case SPC2_RESERVATIONS: - len = sprintf(page, "SPC2_RESERVATIONS\n"); - break; - case SPC_PASSTHROUGH: - len = sprintf(page, "SPC_PASSTHROUGH\n"); - break; - default: - len = sprintf(page, "UNKNOWN\n"); - break; - } - - return len; + if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) + return sprintf(page, "SPC_PASSTHROUGH\n"); + else if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) + return sprintf(page, "SPC2_RESERVATIONS\n"); + else + return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n"); } SE_DEV_PR_ATTR_RO(res_type); @@ -1237,7 +1181,7 @@ SE_DEV_PR_ATTR_RO(res_type); static ssize_t target_core_dev_pr_show_attr_res_aptpl_active( struct se_device *dev, char *page) { - if (dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS) + if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) return 0; return sprintf(page, "APTPL Bit Status: %s\n", @@ -1252,7 +1196,7 @@ SE_DEV_PR_ATTR_RO(res_aptpl_active); static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata( struct se_device *dev, char *page) { - if (dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS) + if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) return 0; return sprintf(page, "Ready to process PR APTPL metadata..\n"); @@ -1299,7 +1243,9 @@ static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata( u16 port_rpti = 0, tpgt = 0; u8 type = 0, scope; - if (dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS) + if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) + return 0; + if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) return 0; if (dev->export_count) { diff --git a/drivers/target/target_core_device.c b/drivers/target/target_core_device.c index 6a27e7fd33fb..4ae1d3913821 100644 --- a/drivers/target/target_core_device.c +++ b/drivers/target/target_core_device.c @@ -1398,7 +1398,6 @@ struct se_device *target_alloc_device(struct se_hba *hba, const char *name) dev->dev_attrib.emulate_tas = DA_EMULATE_TAS; dev->dev_attrib.emulate_tpu = DA_EMULATE_TPU; dev->dev_attrib.emulate_tpws = DA_EMULATE_TPWS; - dev->dev_attrib.emulate_reservations = DA_EMULATE_RESERVATIONS; dev->dev_attrib.emulate_alua = DA_EMULATE_ALUA; dev->dev_attrib.enforce_pr_isids = DA_ENFORCE_PR_ISIDS; dev->dev_attrib.is_nonrot = DA_IS_NONROT; @@ -1447,8 +1446,6 @@ int target_configure_device(struct se_device *dev) dev->dev_index = scsi_get_new_index(SCSI_DEVICE_INDEX); dev->creation_time = get_jiffies_64(); - core_setup_reservations(dev); - ret = core_setup_alua(dev); if (ret) goto out; diff --git a/drivers/target/target_core_pr.c b/drivers/target/target_core_pr.c index 2b289891672f..f561a08ff8e5 100644 --- a/drivers/target/target_core_pr.c +++ b/drivers/target/target_core_pr.c @@ -68,49 +68,32 @@ int core_pr_dump_initiator_port( static void __core_scsi3_complete_pro_release(struct se_device *, struct se_node_acl *, struct t10_pr_registration *, int); -static int core_scsi2_reservation_seq_non_holder( - struct se_cmd *cmd, - unsigned char *cdb, - u32 pr_reg_type) +static int target_scsi2_reservation_check(struct se_cmd *cmd) { - switch (cdb[0]) { + struct se_device *dev = cmd->se_dev; + struct se_session *sess = cmd->se_sess; + + switch (cmd->t_task_cdb[0]) { case INQUIRY: case RELEASE: case RELEASE_10: return 0; default: - return 1; + break; } - return 1; -} - -static int core_scsi2_reservation_check(struct se_cmd *cmd, u32 *pr_reg_type) -{ - struct se_device *dev = cmd->se_dev; - struct se_session *sess = cmd->se_sess; - int ret; - - if (!sess) + if (!dev->dev_reserved_node_acl || !sess) return 0; - spin_lock(&dev->dev_reservation_lock); - if (!dev->dev_reserved_node_acl || !sess) { - spin_unlock(&dev->dev_reservation_lock); - return 0; - } - if (dev->dev_reserved_node_acl != sess->se_node_acl) { - spin_unlock(&dev->dev_reservation_lock); - return -EINVAL; - } - if (!(dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS_WITH_ISID)) { - spin_unlock(&dev->dev_reservation_lock); - return 0; + if (dev->dev_reserved_node_acl != sess->se_node_acl) + return -EBUSY; + + if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS_WITH_ISID) { + if (dev->dev_res_bin_isid != sess->sess_bin_isid) + return -EBUSY; } - ret = (dev->dev_res_bin_isid == sess->sess_bin_isid) ? 0 : -EINVAL; - spin_unlock(&dev->dev_reservation_lock); - return ret; + return 0; } static struct t10_pr_registration *core_scsi3_locate_pr_reg(struct se_device *, @@ -123,12 +106,8 @@ static int target_check_scsi2_reservation_conflict(struct se_cmd *cmd) struct se_device *dev = cmd->se_dev; struct t10_pr_registration *pr_reg; struct t10_reservation *pr_tmpl = &dev->t10_pr; - int crh = (dev->t10_pr.res_type == SPC3_PERSISTENT_RESERVATIONS); int conflict = 0; - if (!crh) - return -EINVAL; - pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, se_sess); if (pr_reg) { @@ -319,9 +298,9 @@ out: */ static int core_scsi3_pr_seq_non_holder( struct se_cmd *cmd, - unsigned char *cdb, u32 pr_reg_type) { + unsigned char *cdb = cmd->t_task_cdb; struct se_dev_entry *se_deve; struct se_session *se_sess = cmd->se_sess; int other_cdb = 0, ignore_reg; @@ -330,17 +309,11 @@ static int core_scsi3_pr_seq_non_holder( int we = 0; /* Write Exclusive */ int legacy = 0; /* Act like a legacy device and return * RESERVATION CONFLICT on some CDBs */ - /* - * A legacy SPC-2 reservation is being held. - */ - if (cmd->se_dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) - return core_scsi2_reservation_seq_non_holder(cmd, - cdb, pr_reg_type); se_deve = se_sess->se_node_acl->device_list[cmd->orig_fe_lun]; /* * Determine if the registration should be ignored due to - * non-matching ISIDs in core_scsi3_pr_reservation_check(). + * non-matching ISIDs in target_scsi3_pr_reservation_check(). */ ignore_reg = (pr_reg_type & 0x80000000); if (ignore_reg) @@ -563,6 +536,36 @@ static int core_scsi3_pr_seq_non_holder( return 1; /* Conflict by default */ } +static int target_scsi3_pr_reservation_check(struct se_cmd *cmd) +{ + struct se_device *dev = cmd->se_dev; + struct se_session *sess = cmd->se_sess; + u32 pr_reg_type; + + if (!dev->dev_pr_res_holder) + return 0; + + pr_reg_type = dev->dev_pr_res_holder->pr_res_type; + cmd->pr_res_key = dev->dev_pr_res_holder->pr_res_key; + if (dev->dev_pr_res_holder->pr_reg_nacl != sess->se_node_acl) + goto check_nonholder; + + if (dev->dev_pr_res_holder->isid_present_at_reg) { + if (dev->dev_pr_res_holder->pr_reg_bin_isid != + sess->sess_bin_isid) { + pr_reg_type |= 0x80000000; + goto check_nonholder; + } + } + + return 0; + +check_nonholder: + if (core_scsi3_pr_seq_non_holder(cmd, pr_reg_type)) + return -EBUSY; + return 0; +} + static u32 core_scsi3_pr_generation(struct se_device *dev) { u32 prg; @@ -583,50 +586,6 @@ static u32 core_scsi3_pr_generation(struct se_device *dev) return prg; } -static int core_scsi3_pr_reservation_check( - struct se_cmd *cmd, - u32 *pr_reg_type) -{ - struct se_device *dev = cmd->se_dev; - struct se_session *sess = cmd->se_sess; - int ret; - - if (!sess) - return 0; - /* - * A legacy SPC-2 reservation is being held. - */ - if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) - return core_scsi2_reservation_check(cmd, pr_reg_type); - - spin_lock(&dev->dev_reservation_lock); - if (!dev->dev_pr_res_holder) { - spin_unlock(&dev->dev_reservation_lock); - return 0; - } - *pr_reg_type = dev->dev_pr_res_holder->pr_res_type; - cmd->pr_res_key = dev->dev_pr_res_holder->pr_res_key; - if (dev->dev_pr_res_holder->pr_reg_nacl != sess->se_node_acl) { - spin_unlock(&dev->dev_reservation_lock); - return -EINVAL; - } - if (!dev->dev_pr_res_holder->isid_present_at_reg) { - spin_unlock(&dev->dev_reservation_lock); - return 0; - } - ret = (dev->dev_pr_res_holder->pr_reg_bin_isid == - sess->sess_bin_isid) ? 0 : -EINVAL; - /* - * Use bit in *pr_reg_type to notify ISID mismatch in - * core_scsi3_pr_seq_non_holder(). - */ - if (ret != 0) - *pr_reg_type |= 0x80000000; - spin_unlock(&dev->dev_reservation_lock); - - return ret; -} - static struct t10_pr_registration *__core_scsi3_do_alloc_registration( struct se_device *dev, struct se_node_acl *nacl, @@ -998,7 +957,7 @@ int core_scsi3_check_aptpl_registration( struct se_node_acl *nacl = lun_acl->se_lun_nacl; struct se_dev_entry *deve = nacl->device_list[lun_acl->mapped_lun]; - if (dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS) + if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) return 0; return __core_scsi3_check_aptpl_registration(dev, tpg, lun, @@ -4343,49 +4302,24 @@ int target_scsi3_emulate_pr_in(struct se_cmd *cmd) return ret; } -static int core_pt_reservation_check(struct se_cmd *cmd, u32 *pr_res_type) +int target_check_reservation(struct se_cmd *cmd) { - return 0; -} + struct se_device *dev = cmd->se_dev; + int ret; -static int core_pt_seq_non_holder( - struct se_cmd *cmd, - unsigned char *cdb, - u32 pr_reg_type) -{ - return 0; -} + if (!cmd->se_sess) + return 0; + if (dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE) + return 0; + if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) + return 0; -void core_setup_reservations(struct se_device *dev) -{ - struct t10_reservation *rest = &dev->t10_pr; + spin_lock(&dev->dev_reservation_lock); + if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) + ret = target_scsi2_reservation_check(cmd); + else + ret = target_scsi3_pr_reservation_check(cmd); + spin_unlock(&dev->dev_reservation_lock); - /* - * If this device is from Target_Core_Mod/pSCSI, use the reservations - * of the Underlying SCSI hardware. In Linux/SCSI terms, this can - * cause a problem because libata and some SATA RAID HBAs appear - * under Linux/SCSI, but to emulate reservations themselves. - */ - if ((dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE) || - (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV && - !dev->dev_attrib.emulate_reservations)) { - rest->res_type = SPC_PASSTHROUGH; - rest->pr_ops.t10_reservation_check = &core_pt_reservation_check; - rest->pr_ops.t10_seq_non_holder = &core_pt_seq_non_holder; - pr_debug("%s: Using SPC_PASSTHROUGH, no reservation" - " emulation\n", dev->transport->name); - } else if (dev->transport->get_device_rev(dev) >= SCSI_3) { - rest->res_type = SPC3_PERSISTENT_RESERVATIONS; - rest->pr_ops.t10_reservation_check = &core_scsi3_pr_reservation_check; - rest->pr_ops.t10_seq_non_holder = &core_scsi3_pr_seq_non_holder; - pr_debug("%s: Using SPC3_PERSISTENT_RESERVATIONS" - " emulation\n", dev->transport->name); - } else { - rest->res_type = SPC2_RESERVATIONS; - rest->pr_ops.t10_reservation_check = &core_scsi2_reservation_check; - rest->pr_ops.t10_seq_non_holder = - &core_scsi2_reservation_seq_non_holder; - pr_debug("%s: Using SPC2_RESERVATIONS emulation\n", - dev->transport->name); - } + return ret; } diff --git a/drivers/target/target_core_pr.h b/drivers/target/target_core_pr.h index 78451437d2c2..7616f2690ca0 100644 --- a/drivers/target/target_core_pr.h +++ b/drivers/target/target_core_pr.h @@ -63,6 +63,6 @@ extern unsigned char *core_scsi3_pr_dump_type(int); extern int target_scsi3_emulate_pr_in(struct se_cmd *); extern int target_scsi3_emulate_pr_out(struct se_cmd *); -extern void core_setup_reservations(struct se_device *); +extern int target_check_reservation(struct se_cmd *cmd); #endif /* TARGET_CORE_PR_H */ diff --git a/drivers/target/target_core_spc.c b/drivers/target/target_core_spc.c index 8ca62631ec7f..862e4347f68f 100644 --- a/drivers/target/target_core_spc.c +++ b/drivers/target/target_core_spc.c @@ -1003,14 +1003,12 @@ int spc_parse_cdb(struct se_cmd *cmd, unsigned int *size) *size = (cdb[7] << 8) + cdb[8]; break; case PERSISTENT_RESERVE_IN: - if (dev->t10_pr.res_type == SPC3_PERSISTENT_RESERVATIONS) - cmd->execute_cmd = target_scsi3_emulate_pr_in; *size = (cdb[7] << 8) + cdb[8]; + cmd->execute_cmd = target_scsi3_emulate_pr_in; break; case PERSISTENT_RESERVE_OUT: - if (dev->t10_pr.res_type == SPC3_PERSISTENT_RESERVATIONS) - cmd->execute_cmd = target_scsi3_emulate_pr_out; *size = (cdb[7] << 8) + cdb[8]; + cmd->execute_cmd = target_scsi3_emulate_pr_out; break; case RELEASE: case RELEASE_10: @@ -1019,8 +1017,7 @@ int spc_parse_cdb(struct se_cmd *cmd, unsigned int *size) else *size = cmd->data_length; - if (dev->t10_pr.res_type != SPC_PASSTHROUGH) - cmd->execute_cmd = target_scsi2_reservation_release; + cmd->execute_cmd = target_scsi2_reservation_release; break; case RESERVE: case RESERVE_10: @@ -1033,15 +1030,7 @@ int spc_parse_cdb(struct se_cmd *cmd, unsigned int *size) else *size = cmd->data_length; - /* - * Setup the legacy emulated handler for SPC-2 and - * >= SPC-3 compatible reservation handling (CRH=1) - * Otherwise, we assume the underlying SCSI logic is - * is running in SPC_PASSTHROUGH, and wants reservations - * emulation disabled. - */ - if (dev->t10_pr.res_type != SPC_PASSTHROUGH) - cmd->execute_cmd = target_scsi2_reservation_reserve; + cmd->execute_cmd = target_scsi2_reservation_reserve; break; case REQUEST_SENSE: *size = cdb[4]; diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c index 757e3777ce79..e996bdf480cf 100644 --- a/drivers/target/target_core_transport.c +++ b/drivers/target/target_core_transport.c @@ -1103,7 +1103,6 @@ int target_setup_cmd_from_cdb( unsigned char *cdb) { struct se_device *dev = cmd->se_dev; - u32 pr_reg_type = 0; u8 alua_ascq = 0; unsigned long flags; int ret; @@ -1180,20 +1179,13 @@ int target_setup_cmd_from_cdb( /* * Check status for SPC-3 Persistent Reservations */ - if (dev->t10_pr.pr_ops.t10_reservation_check(cmd, &pr_reg_type)) { - if (dev->t10_pr.pr_ops.t10_seq_non_holder( - cmd, cdb, pr_reg_type) != 0) { - cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; - cmd->se_cmd_flags |= SCF_SCSI_RESERVATION_CONFLICT; - cmd->scsi_status = SAM_STAT_RESERVATION_CONFLICT; - cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; - return -EBUSY; - } - /* - * This means the CDB is allowed for the SCSI Initiator port - * when said port is *NOT* holding the legacy SPC-2 or - * SPC-3 Persistent Reservation. - */ + ret = target_check_reservation(cmd); + if (ret) { + cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; + cmd->se_cmd_flags |= SCF_SCSI_RESERVATION_CONFLICT; + cmd->scsi_status = SAM_STAT_RESERVATION_CONFLICT; + cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; + return ret; } ret = dev->transport->parse_cdb(cmd); diff --git a/include/target/target_core_base.h b/include/target/target_core_base.h index 15af1307d064..892a93dec19c 100644 --- a/include/target/target_core_base.h +++ b/include/target/target_core_base.h @@ -93,8 +93,6 @@ */ #define DA_EMULATE_TPWS 0 /* No Emulation for PSCSI by default */ -#define DA_EMULATE_RESERVATIONS 0 -/* No Emulation for PSCSI by default */ #define DA_EMULATE_ALUA 0 /* Enforce SCSI Initiator Port TransportID with 'ISID' for PR */ #define DA_ENFORCE_PR_ISIDS 1 @@ -333,18 +331,6 @@ struct t10_wwn { struct list_head t10_vpd_list; }; - -/* - * Used by TCM Core internally to signal if >= SPC-3 persistent reservations - * emulation is enabled or disabled, or running in with TCM/pSCSI passthrough - * mode - */ -typedef enum { - SPC_PASSTHROUGH, - SPC2_RESERVATIONS, - SPC3_PERSISTENT_RESERVATIONS -} t10_reservations_index_t; - struct t10_pr_registration { /* Used for fabrics that contain WWN+ISID */ #define PR_REG_ISID_LEN 16 @@ -386,18 +372,6 @@ struct t10_pr_registration { struct list_head pr_reg_atp_mem_list; }; -/* - * This set of function pointer ops is set based upon SPC3_PERSISTENT_RESERVATIONS, - * SPC2_RESERVATIONS or SPC_PASSTHROUGH in drivers/target/target_core_pr.c: - * core_setup_reservations() - */ -struct t10_reservation_ops { - int (*t10_reservation_check)(struct se_cmd *, u32 *); - int (*t10_seq_non_holder)(struct se_cmd *, unsigned char *, u32); - int (*t10_pr_register)(struct se_cmd *); - int (*t10_pr_clear)(struct se_cmd *); -}; - struct t10_reservation { /* Reservation effects all target ports */ int pr_all_tg_pt; @@ -408,7 +382,6 @@ struct t10_reservation { #define PR_APTPL_BUF_LEN 8192 u32 pr_aptpl_buf_len; u32 pr_generation; - t10_reservations_index_t res_type; spinlock_t registration_lock; spinlock_t aptpl_reg_lock; /* @@ -424,7 +397,6 @@ struct t10_reservation { struct se_node_acl *pr_res_holder; struct list_head registration_list; struct list_head aptpl_reg_list; - struct t10_reservation_ops pr_ops; }; struct se_tmr_req { @@ -633,7 +605,6 @@ struct se_dev_attrib { int emulate_tas; int emulate_tpu; int emulate_tpws; - int emulate_reservations; int emulate_alua; int enforce_pr_isids; int is_nonrot; -- 2.34.1