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authorLinus Torvalds <torvalds@linux-foundation.org>2017-07-13 14:27:32 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2017-07-13 14:27:32 -0700
commit48ea2cedde3507941f4549b0d27ed46ed29e39ff (patch)
tree07dfc2fe520445598e5429df88b32bd470f0f055 /drivers/target
parent62403005975c678ba7594a36670ae3bf0273d7c4 (diff)
parent138d351eefb727ab9e41a3dc5f112ceb4f6e59f2 (diff)
Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending
Pull SCSI target updates from Nicholas Bellinger: "It's been usually busy for summer, with most of the efforts centered around TCMU developments and various target-core + fabric driver bug fixing activities. Not particularly large in terms of LoC, but lots of smaller patches from many different folks. The highlights include: - ibmvscsis logical partition manager support (Michael Cyr + Bryant Ly) - Convert target/iblock WRITE_SAME to blkdev_issue_zeroout (hch + nab) - Add support for TMR percpu LUN reference counting (nab) - Fix a potential deadlock between EXTENDED_COPY and iscsi shutdown (Bart) - Fix COMPARE_AND_WRITE caw_sem leak during se_cmd quiesce (Jiang Yi) - Fix TMCU module removal (Xiubo Li) - Fix iser-target OOPs during login failure (Andrea Righi + Sagi) - Breakup target-core free_device backend driver callback (mnc) - Perform TCMU add/delete/reconfig synchronously (mnc) - Fix TCMU multiple UIO open/close sequences (mnc) - Fix TCMU CHECK_CONDITION sense handling (mnc) - Fix target-core SAM_STAT_BUSY + TASK_SET_FULL handling (mnc + nab) - Introduce TYPE_ZBC support in PSCSI (Damien Le Moal) - Fix possible TCMU memory leak + OOPs when recalculating cmd base size (Xiubo Li + Bryant Ly + Damien Le Moal + mnc) - Add login_keys_workaround attribute for non RFC initiators (Robert LeBlanc + Arun Easi + nab)" * 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: (68 commits) iscsi-target: Add login_keys_workaround attribute for non RFC initiators Revert "qla2xxx: Fix incorrect tcm_qla2xxx_free_cmd use during TMR ABORT" tcmu: clean up the code and with one small fix tcmu: Fix possbile memory leak / OOPs when recalculating cmd base size target: export lio pgr/alua support as device attr target: Fix return sense reason in target_scsi3_emulate_pr_out target: Fix cmd size for PR-OUT in passthrough_parse_cdb tcmu: Fix dev_config_store target: pscsi: Introduce TYPE_ZBC support target: Use macro for WRITE_VERIFY_32 operation codes target: fix SAM_STAT_BUSY/TASK_SET_FULL handling target: remove transport_complete pscsi: finish cmd processing from pscsi_req_done tcmu: fix sense handling during completion target: add helper to copy sense to se_cmd buffer target: do not require a transport_complete for SCF_TRANSPORT_TASK_SENSE target: make device_mutex and device_list static tcmu: Fix flushing cmd entry dcache page tcmu: fix multiple uio open/close sequences tcmu: drop configured check in destroy ...
Diffstat (limited to 'drivers/target')
-rw-r--r--drivers/target/iscsi/iscsi_target.c10
-rw-r--r--drivers/target/iscsi/iscsi_target_configfs.c2
-rw-r--r--drivers/target/iscsi/iscsi_target_nego.c30
-rw-r--r--drivers/target/iscsi/iscsi_target_parameters.c41
-rw-r--r--drivers/target/iscsi/iscsi_target_parameters.h2
-rw-r--r--drivers/target/iscsi/iscsi_target_tpg.c27
-rw-r--r--drivers/target/iscsi/iscsi_target_tpg.h1
-rw-r--r--drivers/target/iscsi/iscsi_target_util.c60
-rw-r--r--drivers/target/iscsi/iscsi_target_util.h2
-rw-r--r--drivers/target/loopback/tcm_loop.c77
-rw-r--r--drivers/target/loopback/tcm_loop.h6
-rw-r--r--drivers/target/target_core_alua.c8
-rw-r--r--drivers/target/target_core_configfs.c30
-rw-r--r--drivers/target/target_core_device.c145
-rw-r--r--drivers/target/target_core_fabric_configfs.c25
-rw-r--r--drivers/target/target_core_fabric_lib.c6
-rw-r--r--drivers/target/target_core_file.c7
-rw-r--r--drivers/target/target_core_iblock.c52
-rw-r--r--drivers/target/target_core_internal.h5
-rw-r--r--drivers/target/target_core_pr.c109
-rw-r--r--drivers/target/target_core_pscsi.c82
-rw-r--r--drivers/target/target_core_pscsi.h4
-rw-r--r--drivers/target/target_core_rd.c11
-rw-r--r--drivers/target/target_core_sbc.c65
-rw-r--r--drivers/target/target_core_spc.c42
-rw-r--r--drivers/target/target_core_tmr.c18
-rw-r--r--drivers/target/target_core_tpg.c1
-rw-r--r--drivers/target/target_core_transport.c222
-rw-r--r--drivers/target/target_core_user.c447
-rw-r--r--drivers/target/target_core_xcopy.c184
30 files changed, 1121 insertions, 600 deletions
diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c
index 3fdca2cdd8da..74e4975dd1b1 100644
--- a/drivers/target/iscsi/iscsi_target.c
+++ b/drivers/target/iscsi/iscsi_target.c
@@ -488,15 +488,13 @@ EXPORT_SYMBOL(iscsit_queue_rsp);
void iscsit_aborted_task(struct iscsi_conn *conn, struct iscsi_cmd *cmd)
{
- bool scsi_cmd = (cmd->iscsi_opcode == ISCSI_OP_SCSI_CMD);
-
spin_lock_bh(&conn->cmd_lock);
if (!list_empty(&cmd->i_conn_node) &&
!(cmd->se_cmd.transport_state & CMD_T_FABRIC_STOP))
list_del_init(&cmd->i_conn_node);
spin_unlock_bh(&conn->cmd_lock);
- __iscsit_free_cmd(cmd, scsi_cmd, true);
+ __iscsit_free_cmd(cmd, true);
}
EXPORT_SYMBOL(iscsit_aborted_task);
@@ -1251,12 +1249,8 @@ int iscsit_process_scsi_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
* execution. These exceptions are processed in CmdSN order using
* iscsit_check_received_cmdsn() in iscsit_get_immediate_data() below.
*/
- if (cmd->sense_reason) {
- if (cmd->reject_reason)
- return 0;
-
+ if (cmd->sense_reason)
return 1;
- }
/*
* Call directly into transport_generic_new_cmd() to perform
* the backend memory allocation.
diff --git a/drivers/target/iscsi/iscsi_target_configfs.c b/drivers/target/iscsi/iscsi_target_configfs.c
index 535a8e06a401..0dd4c45f7575 100644
--- a/drivers/target/iscsi/iscsi_target_configfs.c
+++ b/drivers/target/iscsi/iscsi_target_configfs.c
@@ -781,6 +781,7 @@ DEF_TPG_ATTRIB(default_erl);
DEF_TPG_ATTRIB(t10_pi);
DEF_TPG_ATTRIB(fabric_prot_type);
DEF_TPG_ATTRIB(tpg_enabled_sendtargets);
+DEF_TPG_ATTRIB(login_keys_workaround);
static struct configfs_attribute *lio_target_tpg_attrib_attrs[] = {
&iscsi_tpg_attrib_attr_authentication,
@@ -796,6 +797,7 @@ static struct configfs_attribute *lio_target_tpg_attrib_attrs[] = {
&iscsi_tpg_attrib_attr_t10_pi,
&iscsi_tpg_attrib_attr_fabric_prot_type,
&iscsi_tpg_attrib_attr_tpg_enabled_sendtargets,
+ &iscsi_tpg_attrib_attr_login_keys_workaround,
NULL,
};
diff --git a/drivers/target/iscsi/iscsi_target_nego.c b/drivers/target/iscsi/iscsi_target_nego.c
index 6f88b31242b0..7a6751fecd32 100644
--- a/drivers/target/iscsi/iscsi_target_nego.c
+++ b/drivers/target/iscsi/iscsi_target_nego.c
@@ -655,28 +655,6 @@ err:
iscsit_deaccess_np(np, tpg, tpg_np);
}
-static void iscsi_target_do_cleanup(struct work_struct *work)
-{
- struct iscsi_conn *conn = container_of(work,
- struct iscsi_conn, login_cleanup_work.work);
- struct sock *sk = conn->sock->sk;
- struct iscsi_login *login = conn->login;
- struct iscsi_np *np = login->np;
- struct iscsi_portal_group *tpg = conn->tpg;
- struct iscsi_tpg_np *tpg_np = conn->tpg_np;
-
- pr_debug("Entering iscsi_target_do_cleanup\n");
-
- cancel_delayed_work_sync(&conn->login_work);
- conn->orig_state_change(sk);
-
- iscsi_target_restore_sock_callbacks(conn);
- iscsi_target_login_drop(conn, login);
- iscsit_deaccess_np(np, tpg, tpg_np);
-
- pr_debug("iscsi_target_do_cleanup done()\n");
-}
-
static void iscsi_target_sk_state_change(struct sock *sk)
{
struct iscsi_conn *conn;
@@ -886,7 +864,8 @@ static int iscsi_target_handle_csg_zero(
SENDER_TARGET,
login->rsp_buf,
&login->rsp_length,
- conn->param_list);
+ conn->param_list,
+ conn->tpg->tpg_attrib.login_keys_workaround);
if (ret < 0)
return -1;
@@ -956,7 +935,8 @@ static int iscsi_target_handle_csg_one(struct iscsi_conn *conn, struct iscsi_log
SENDER_TARGET,
login->rsp_buf,
&login->rsp_length,
- conn->param_list);
+ conn->param_list,
+ conn->tpg->tpg_attrib.login_keys_workaround);
if (ret < 0) {
iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
ISCSI_LOGIN_STATUS_INIT_ERR);
@@ -1082,7 +1062,6 @@ int iscsi_target_locate_portal(
int sessiontype = 0, ret = 0, tag_num, tag_size;
INIT_DELAYED_WORK(&conn->login_work, iscsi_target_do_login_rx);
- INIT_DELAYED_WORK(&conn->login_cleanup_work, iscsi_target_do_cleanup);
iscsi_target_set_sock_callbacks(conn);
login->np = np;
@@ -1331,7 +1310,6 @@ int iscsi_target_start_negotiation(
if (ret < 0) {
cancel_delayed_work_sync(&conn->login_work);
- cancel_delayed_work_sync(&conn->login_cleanup_work);
iscsi_target_restore_sock_callbacks(conn);
iscsi_remove_failed_auth_entry(conn);
}
diff --git a/drivers/target/iscsi/iscsi_target_parameters.c b/drivers/target/iscsi/iscsi_target_parameters.c
index fce627628200..caab1045742d 100644
--- a/drivers/target/iscsi/iscsi_target_parameters.c
+++ b/drivers/target/iscsi/iscsi_target_parameters.c
@@ -765,7 +765,8 @@ static int iscsi_check_for_auth_key(char *key)
return 0;
}
-static void iscsi_check_proposer_for_optional_reply(struct iscsi_param *param)
+static void iscsi_check_proposer_for_optional_reply(struct iscsi_param *param,
+ bool keys_workaround)
{
if (IS_TYPE_BOOL_AND(param)) {
if (!strcmp(param->value, NO))
@@ -773,19 +774,31 @@ static void iscsi_check_proposer_for_optional_reply(struct iscsi_param *param)
} else if (IS_TYPE_BOOL_OR(param)) {
if (!strcmp(param->value, YES))
SET_PSTATE_REPLY_OPTIONAL(param);
- /*
- * Required for gPXE iSCSI boot client
- */
- if (!strcmp(param->name, IMMEDIATEDATA))
- SET_PSTATE_REPLY_OPTIONAL(param);
+
+ if (keys_workaround) {
+ /*
+ * Required for gPXE iSCSI boot client
+ */
+ if (!strcmp(param->name, IMMEDIATEDATA))
+ SET_PSTATE_REPLY_OPTIONAL(param);
+ }
} else if (IS_TYPE_NUMBER(param)) {
if (!strcmp(param->name, MAXRECVDATASEGMENTLENGTH))
SET_PSTATE_REPLY_OPTIONAL(param);
- /*
- * Required for gPXE iSCSI boot client
- */
- if (!strcmp(param->name, MAXCONNECTIONS))
- SET_PSTATE_REPLY_OPTIONAL(param);
+
+ if (keys_workaround) {
+ /*
+ * Required for Mellanox Flexboot PXE boot ROM
+ */
+ if (!strcmp(param->name, FIRSTBURSTLENGTH))
+ SET_PSTATE_REPLY_OPTIONAL(param);
+
+ /*
+ * Required for gPXE iSCSI boot client
+ */
+ if (!strcmp(param->name, MAXCONNECTIONS))
+ SET_PSTATE_REPLY_OPTIONAL(param);
+ }
} else if (IS_PHASE_DECLARATIVE(param))
SET_PSTATE_REPLY_OPTIONAL(param);
}
@@ -1422,7 +1435,8 @@ int iscsi_encode_text_output(
u8 sender,
char *textbuf,
u32 *length,
- struct iscsi_param_list *param_list)
+ struct iscsi_param_list *param_list,
+ bool keys_workaround)
{
char *output_buf = NULL;
struct iscsi_extra_response *er;
@@ -1458,7 +1472,8 @@ int iscsi_encode_text_output(
*length += 1;
output_buf = textbuf + *length;
SET_PSTATE_PROPOSER(param);
- iscsi_check_proposer_for_optional_reply(param);
+ iscsi_check_proposer_for_optional_reply(param,
+ keys_workaround);
pr_debug("Sending key: %s=%s\n",
param->name, param->value);
}
diff --git a/drivers/target/iscsi/iscsi_target_parameters.h b/drivers/target/iscsi/iscsi_target_parameters.h
index 9962ccf0ccd7..c47b73f57528 100644
--- a/drivers/target/iscsi/iscsi_target_parameters.h
+++ b/drivers/target/iscsi/iscsi_target_parameters.h
@@ -46,7 +46,7 @@ extern int iscsi_extract_key_value(char *, char **, char **);
extern int iscsi_update_param_value(struct iscsi_param *, char *);
extern int iscsi_decode_text_input(u8, u8, char *, u32, struct iscsi_conn *);
extern int iscsi_encode_text_output(u8, u8, char *, u32 *,
- struct iscsi_param_list *);
+ struct iscsi_param_list *, bool);
extern int iscsi_check_negotiated_keys(struct iscsi_param_list *);
extern void iscsi_set_connection_parameters(struct iscsi_conn_ops *,
struct iscsi_param_list *);
diff --git a/drivers/target/iscsi/iscsi_target_tpg.c b/drivers/target/iscsi/iscsi_target_tpg.c
index 2e7e08dbda48..594d07a1e995 100644
--- a/drivers/target/iscsi/iscsi_target_tpg.c
+++ b/drivers/target/iscsi/iscsi_target_tpg.c
@@ -227,6 +227,7 @@ static void iscsit_set_default_tpg_attribs(struct iscsi_portal_group *tpg)
a->t10_pi = TA_DEFAULT_T10_PI;
a->fabric_prot_type = TA_DEFAULT_FABRIC_PROT_TYPE;
a->tpg_enabled_sendtargets = TA_DEFAULT_TPG_ENABLED_SENDTARGETS;
+ a->login_keys_workaround = TA_DEFAULT_LOGIN_KEYS_WORKAROUND;
}
int iscsit_tpg_add_portal_group(struct iscsi_tiqn *tiqn, struct iscsi_portal_group *tpg)
@@ -311,11 +312,9 @@ int iscsit_tpg_enable_portal_group(struct iscsi_portal_group *tpg)
struct iscsi_tiqn *tiqn = tpg->tpg_tiqn;
int ret;
- spin_lock(&tpg->tpg_state_lock);
if (tpg->tpg_state == TPG_STATE_ACTIVE) {
pr_err("iSCSI target portal group: %hu is already"
" active, ignoring request.\n", tpg->tpgt);
- spin_unlock(&tpg->tpg_state_lock);
return -EINVAL;
}
/*
@@ -324,10 +323,8 @@ int iscsit_tpg_enable_portal_group(struct iscsi_portal_group *tpg)
* is enforced (as per default), and remove the NONE option.
*/
param = iscsi_find_param_from_key(AUTHMETHOD, tpg->param_list);
- if (!param) {
- spin_unlock(&tpg->tpg_state_lock);
+ if (!param)
return -EINVAL;
- }
if (tpg->tpg_attrib.authentication) {
if (!strcmp(param->value, NONE)) {
@@ -341,6 +338,7 @@ int iscsit_tpg_enable_portal_group(struct iscsi_portal_group *tpg)
goto err;
}
+ spin_lock(&tpg->tpg_state_lock);
tpg->tpg_state = TPG_STATE_ACTIVE;
spin_unlock(&tpg->tpg_state_lock);
@@ -353,7 +351,6 @@ int iscsit_tpg_enable_portal_group(struct iscsi_portal_group *tpg)
return 0;
err:
- spin_unlock(&tpg->tpg_state_lock);
return ret;
}
@@ -899,3 +896,21 @@ int iscsit_ta_tpg_enabled_sendtargets(
return 0;
}
+
+int iscsit_ta_login_keys_workaround(
+ struct iscsi_portal_group *tpg,
+ u32 flag)
+{
+ struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
+
+ if ((flag != 0) && (flag != 1)) {
+ pr_err("Illegal value %d\n", flag);
+ return -EINVAL;
+ }
+
+ a->login_keys_workaround = flag;
+ pr_debug("iSCSI_TPG[%hu] - TPG enabled bit for login keys workaround: %s ",
+ tpg->tpgt, (a->login_keys_workaround) ? "ON" : "OFF");
+
+ return 0;
+}
diff --git a/drivers/target/iscsi/iscsi_target_tpg.h b/drivers/target/iscsi/iscsi_target_tpg.h
index ceba29851167..59fd3cabe89d 100644
--- a/drivers/target/iscsi/iscsi_target_tpg.h
+++ b/drivers/target/iscsi/iscsi_target_tpg.h
@@ -48,5 +48,6 @@ extern int iscsit_ta_default_erl(struct iscsi_portal_group *, u32);
extern int iscsit_ta_t10_pi(struct iscsi_portal_group *, u32);
extern int iscsit_ta_fabric_prot_type(struct iscsi_portal_group *, u32);
extern int iscsit_ta_tpg_enabled_sendtargets(struct iscsi_portal_group *, u32);
+extern int iscsit_ta_login_keys_workaround(struct iscsi_portal_group *, u32);
#endif /* ISCSI_TARGET_TPG_H */
diff --git a/drivers/target/iscsi/iscsi_target_util.c b/drivers/target/iscsi/iscsi_target_util.c
index 7d3e2fcc26a0..1e36f83b5961 100644
--- a/drivers/target/iscsi/iscsi_target_util.c
+++ b/drivers/target/iscsi/iscsi_target_util.c
@@ -167,6 +167,7 @@ struct iscsi_cmd *iscsit_allocate_cmd(struct iscsi_conn *conn, int state)
cmd->se_cmd.map_tag = tag;
cmd->conn = conn;
+ cmd->data_direction = DMA_NONE;
INIT_LIST_HEAD(&cmd->i_conn_node);
INIT_LIST_HEAD(&cmd->datain_list);
INIT_LIST_HEAD(&cmd->cmd_r2t_list);
@@ -711,19 +712,16 @@ void iscsit_release_cmd(struct iscsi_cmd *cmd)
}
EXPORT_SYMBOL(iscsit_release_cmd);
-void __iscsit_free_cmd(struct iscsi_cmd *cmd, bool scsi_cmd,
- bool check_queues)
+void __iscsit_free_cmd(struct iscsi_cmd *cmd, bool check_queues)
{
struct iscsi_conn *conn = cmd->conn;
- if (scsi_cmd) {
- if (cmd->data_direction == DMA_TO_DEVICE) {
- iscsit_stop_dataout_timer(cmd);
- iscsit_free_r2ts_from_list(cmd);
- }
- if (cmd->data_direction == DMA_FROM_DEVICE)
- iscsit_free_all_datain_reqs(cmd);
+ if (cmd->data_direction == DMA_TO_DEVICE) {
+ iscsit_stop_dataout_timer(cmd);
+ iscsit_free_r2ts_from_list(cmd);
}
+ if (cmd->data_direction == DMA_FROM_DEVICE)
+ iscsit_free_all_datain_reqs(cmd);
if (conn && check_queues) {
iscsit_remove_cmd_from_immediate_queue(cmd, conn);
@@ -736,50 +734,18 @@ void __iscsit_free_cmd(struct iscsi_cmd *cmd, bool scsi_cmd,
void iscsit_free_cmd(struct iscsi_cmd *cmd, bool shutdown)
{
- struct se_cmd *se_cmd = NULL;
+ struct se_cmd *se_cmd = cmd->se_cmd.se_tfo ? &cmd->se_cmd : NULL;
int rc;
- bool op_scsi = false;
- /*
- * Determine if a struct se_cmd is associated with
- * this struct iscsi_cmd.
- */
- switch (cmd->iscsi_opcode) {
- case ISCSI_OP_SCSI_CMD:
- op_scsi = true;
- /*
- * Fallthrough
- */
- case ISCSI_OP_SCSI_TMFUNC:
- se_cmd = &cmd->se_cmd;
- __iscsit_free_cmd(cmd, op_scsi, shutdown);
+
+ __iscsit_free_cmd(cmd, shutdown);
+ if (se_cmd) {
rc = transport_generic_free_cmd(se_cmd, shutdown);
if (!rc && shutdown && se_cmd->se_sess) {
- __iscsit_free_cmd(cmd, op_scsi, shutdown);
+ __iscsit_free_cmd(cmd, shutdown);
target_put_sess_cmd(se_cmd);
}
- break;
- case ISCSI_OP_REJECT:
- /*
- * Handle special case for REJECT when iscsi_add_reject*() has
- * overwritten the original iscsi_opcode assignment, and the
- * associated cmd->se_cmd needs to be released.
- */
- if (cmd->se_cmd.se_tfo != NULL) {
- se_cmd = &cmd->se_cmd;
- __iscsit_free_cmd(cmd, true, shutdown);
-
- rc = transport_generic_free_cmd(&cmd->se_cmd, shutdown);
- if (!rc && shutdown && se_cmd->se_sess) {
- __iscsit_free_cmd(cmd, true, shutdown);
- target_put_sess_cmd(se_cmd);
- }
- break;
- }
- /* Fall-through */
- default:
- __iscsit_free_cmd(cmd, false, shutdown);
+ } else {
iscsit_release_cmd(cmd);
- break;
}
}
EXPORT_SYMBOL(iscsit_free_cmd);
diff --git a/drivers/target/iscsi/iscsi_target_util.h b/drivers/target/iscsi/iscsi_target_util.h
index 9e4197af8708..425160565d0c 100644
--- a/drivers/target/iscsi/iscsi_target_util.h
+++ b/drivers/target/iscsi/iscsi_target_util.h
@@ -37,7 +37,7 @@ extern void iscsit_remove_cmd_from_tx_queues(struct iscsi_cmd *, struct iscsi_co
extern bool iscsit_conn_all_queues_empty(struct iscsi_conn *);
extern void iscsit_free_queue_reqs_for_conn(struct iscsi_conn *);
extern void iscsit_release_cmd(struct iscsi_cmd *);
-extern void __iscsit_free_cmd(struct iscsi_cmd *, bool, bool);
+extern void __iscsit_free_cmd(struct iscsi_cmd *, bool);
extern void iscsit_free_cmd(struct iscsi_cmd *, bool);
extern int iscsit_check_session_usage_count(struct iscsi_session *);
extern void iscsit_dec_session_usage_count(struct iscsi_session *);
diff --git a/drivers/target/loopback/tcm_loop.c b/drivers/target/loopback/tcm_loop.c
index 5091b31b3e56..b6a913e38b30 100644
--- a/drivers/target/loopback/tcm_loop.c
+++ b/drivers/target/loopback/tcm_loop.c
@@ -51,19 +51,7 @@ static int tcm_loop_queue_status(struct se_cmd *se_cmd);
*/
static int tcm_loop_check_stop_free(struct se_cmd *se_cmd)
{
- /*
- * Do not release struct se_cmd's containing a valid TMR
- * pointer. These will be released directly in tcm_loop_device_reset()
- * with transport_generic_free_cmd().
- */
- if (se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)
- return 0;
- /*
- * Release the struct se_cmd, which will make a callback to release
- * struct tcm_loop_cmd * in tcm_loop_deallocate_core_cmd()
- */
- transport_generic_free_cmd(se_cmd, 0);
- return 1;
+ return transport_generic_free_cmd(se_cmd, 0);
}
static void tcm_loop_release_cmd(struct se_cmd *se_cmd)
@@ -218,10 +206,8 @@ static int tcm_loop_issue_tmr(struct tcm_loop_tpg *tl_tpg,
{
struct se_cmd *se_cmd = NULL;
struct se_session *se_sess;
- struct se_portal_group *se_tpg;
struct tcm_loop_nexus *tl_nexus;
struct tcm_loop_cmd *tl_cmd = NULL;
- struct tcm_loop_tmr *tl_tmr = NULL;
int ret = TMR_FUNCTION_FAILED, rc;
/*
@@ -240,55 +226,29 @@ static int tcm_loop_issue_tmr(struct tcm_loop_tpg *tl_tpg,
return ret;
}
- tl_tmr = kzalloc(sizeof(struct tcm_loop_tmr), GFP_KERNEL);
- if (!tl_tmr) {
- pr_err("Unable to allocate memory for tl_tmr\n");
- goto release;
- }
- init_waitqueue_head(&tl_tmr->tl_tmr_wait);
+ init_completion(&tl_cmd->tmr_done);
se_cmd = &tl_cmd->tl_se_cmd;
- se_tpg = &tl_tpg->tl_se_tpg;
se_sess = tl_tpg->tl_nexus->se_sess;
- /*
- * Initialize struct se_cmd descriptor from target_core_mod infrastructure
- */
- transport_init_se_cmd(se_cmd, se_tpg->se_tpg_tfo, se_sess, 0,
- DMA_NONE, TCM_SIMPLE_TAG,
- &tl_cmd->tl_sense_buf[0]);
- rc = core_tmr_alloc_req(se_cmd, tl_tmr, tmr, GFP_KERNEL);
+ rc = target_submit_tmr(se_cmd, se_sess, tl_cmd->tl_sense_buf, lun,
+ NULL, tmr, GFP_KERNEL, task,
+ TARGET_SCF_ACK_KREF);
if (rc < 0)
goto release;
+ wait_for_completion(&tl_cmd->tmr_done);
+ ret = se_cmd->se_tmr_req->response;
+ target_put_sess_cmd(se_cmd);
- if (tmr == TMR_ABORT_TASK)
- se_cmd->se_tmr_req->ref_task_tag = task;
+out:
+ return ret;
- /*
- * Locate the underlying TCM struct se_lun
- */
- if (transport_lookup_tmr_lun(se_cmd, lun) < 0) {
- ret = TMR_LUN_DOES_NOT_EXIST;
- goto release;
- }
- /*
- * Queue the TMR to TCM Core and sleep waiting for
- * tcm_loop_queue_tm_rsp() to wake us up.
- */
- transport_generic_handle_tmr(se_cmd);
- wait_event(tl_tmr->tl_tmr_wait, atomic_read(&tl_tmr->tmr_complete));
- /*
- * The TMR LUN_RESET has completed, check the response status and
- * then release allocations.
- */
- ret = se_cmd->se_tmr_req->response;
release:
if (se_cmd)
- transport_generic_free_cmd(se_cmd, 1);
+ transport_generic_free_cmd(se_cmd, 0);
else
kmem_cache_free(tcm_loop_cmd_cache, tl_cmd);
- kfree(tl_tmr);
- return ret;
+ goto out;
}
static int tcm_loop_abort_task(struct scsi_cmnd *sc)
@@ -669,14 +629,11 @@ static int tcm_loop_queue_status(struct se_cmd *se_cmd)
static void tcm_loop_queue_tm_rsp(struct se_cmd *se_cmd)
{
- struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
- struct tcm_loop_tmr *tl_tmr = se_tmr->fabric_tmr_ptr;
- /*
- * The SCSI EH thread will be sleeping on se_tmr->tl_tmr_wait, go ahead
- * and wake up the wait_queue_head_t in tcm_loop_device_reset()
- */
- atomic_set(&tl_tmr->tmr_complete, 1);
- wake_up(&tl_tmr->tl_tmr_wait);
+ struct tcm_loop_cmd *tl_cmd = container_of(se_cmd,
+ struct tcm_loop_cmd, tl_se_cmd);
+
+ /* Wake up tcm_loop_issue_tmr(). */
+ complete(&tl_cmd->tmr_done);
}
static void tcm_loop_aborted_task(struct se_cmd *se_cmd)
diff --git a/drivers/target/loopback/tcm_loop.h b/drivers/target/loopback/tcm_loop.h
index a8a230b4e6b5..3acc43c05117 100644
--- a/drivers/target/loopback/tcm_loop.h
+++ b/drivers/target/loopback/tcm_loop.h
@@ -16,15 +16,11 @@ struct tcm_loop_cmd {
/* The TCM I/O descriptor that is accessed via container_of() */
struct se_cmd tl_se_cmd;
struct work_struct work;
+ struct completion tmr_done;
/* Sense buffer that will be mapped into outgoing status */
unsigned char tl_sense_buf[TRANSPORT_SENSE_BUFFER];
};
-struct tcm_loop_tmr {
- atomic_t tmr_complete;
- wait_queue_head_t tl_tmr_wait;
-};
-
struct tcm_loop_nexus {
/*
* Pointer to TCM session for I_T Nexus
diff --git a/drivers/target/target_core_alua.c b/drivers/target/target_core_alua.c
index fc4a9c303d55..a91b7c25ffd4 100644
--- a/drivers/target/target_core_alua.c
+++ b/drivers/target/target_core_alua.c
@@ -205,8 +205,8 @@ target_emulate_report_target_port_groups(struct se_cmd *cmd)
/*
* TARGET PORT GROUP
*/
- buf[off++] = ((tg_pt_gp->tg_pt_gp_id >> 8) & 0xff);
- buf[off++] = (tg_pt_gp->tg_pt_gp_id & 0xff);
+ put_unaligned_be16(tg_pt_gp->tg_pt_gp_id, &buf[off]);
+ off += 2;
off++; /* Skip over Reserved */
/*
@@ -235,8 +235,8 @@ target_emulate_report_target_port_groups(struct se_cmd *cmd)
/*
* Set RELATIVE TARGET PORT IDENTIFIER
*/
- buf[off++] = ((lun->lun_rtpi >> 8) & 0xff);
- buf[off++] = (lun->lun_rtpi & 0xff);
+ put_unaligned_be16(lun->lun_rtpi, &buf[off]);
+ off += 2;
rd_len += 4;
}
spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
diff --git a/drivers/target/target_core_configfs.c b/drivers/target/target_core_configfs.c
index 0326607e5ab8..7e87d952bb7a 100644
--- a/drivers/target/target_core_configfs.c
+++ b/drivers/target/target_core_configfs.c
@@ -1085,6 +1085,24 @@ static ssize_t block_size_store(struct config_item *item,
return count;
}
+static ssize_t alua_support_show(struct config_item *item, char *page)
+{
+ struct se_dev_attrib *da = to_attrib(item);
+ u8 flags = da->da_dev->transport->transport_flags;
+
+ return snprintf(page, PAGE_SIZE, "%d\n",
+ flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA ? 0 : 1);
+}
+
+static ssize_t pgr_support_show(struct config_item *item, char *page)
+{
+ struct se_dev_attrib *da = to_attrib(item);
+ u8 flags = da->da_dev->transport->transport_flags;
+
+ return snprintf(page, PAGE_SIZE, "%d\n",
+ flags & TRANSPORT_FLAG_PASSTHROUGH_PGR ? 0 : 1);
+}
+
CONFIGFS_ATTR(, emulate_model_alias);
CONFIGFS_ATTR(, emulate_dpo);
CONFIGFS_ATTR(, emulate_fua_write);
@@ -1116,6 +1134,8 @@ CONFIGFS_ATTR(, unmap_granularity);
CONFIGFS_ATTR(, unmap_granularity_alignment);
CONFIGFS_ATTR(, unmap_zeroes_data);
CONFIGFS_ATTR(, max_write_same_len);
+CONFIGFS_ATTR_RO(, alua_support);
+CONFIGFS_ATTR_RO(, pgr_support);
/*
* dev_attrib attributes for devices using the target core SBC/SPC
@@ -1154,6 +1174,8 @@ struct configfs_attribute *sbc_attrib_attrs[] = {
&attr_unmap_granularity_alignment,
&attr_unmap_zeroes_data,
&attr_max_write_same_len,
+ &attr_alua_support,
+ &attr_pgr_support,
NULL,
};
EXPORT_SYMBOL(sbc_attrib_attrs);
@@ -1168,6 +1190,8 @@ struct configfs_attribute *passthrough_attrib_attrs[] = {
&attr_hw_block_size,
&attr_hw_max_sectors,
&attr_hw_queue_depth,
+ &attr_alua_support,
+ &attr_pgr_support,
NULL,
};
EXPORT_SYMBOL(passthrough_attrib_attrs);
@@ -2236,7 +2260,11 @@ static void target_core_dev_release(struct config_item *item)
target_free_device(dev);
}
-static struct configfs_item_operations target_core_dev_item_ops = {
+/*
+ * Used in target_core_fabric_configfs.c to verify valid se_device symlink
+ * within target_fabric_port_link()
+ */
+struct configfs_item_operations target_core_dev_item_ops = {
.release = target_core_dev_release,
};
diff --git a/drivers/target/target_core_device.c b/drivers/target/target_core_device.c
index 8add07f387f9..e8dd6da164b2 100644
--- a/drivers/target/target_core_device.c
+++ b/drivers/target/target_core_device.c
@@ -49,8 +49,9 @@
#include "target_core_pr.h"
#include "target_core_ua.h"
-DEFINE_MUTEX(g_device_mutex);
-LIST_HEAD(g_device_list);
+static DEFINE_MUTEX(device_mutex);
+static LIST_HEAD(device_list);
+static DEFINE_IDR(devices_idr);
static struct se_hba *lun0_hba;
/* not static, needed by tpg.c */
@@ -168,11 +169,20 @@ int transport_lookup_tmr_lun(struct se_cmd *se_cmd, u64 unpacked_lun)
rcu_read_lock();
deve = target_nacl_find_deve(nacl, unpacked_lun);
if (deve) {
- se_cmd->se_lun = rcu_dereference(deve->se_lun);
se_lun = rcu_dereference(deve->se_lun);
+
+ if (!percpu_ref_tryget_live(&se_lun->lun_ref)) {
+ se_lun = NULL;
+ goto out_unlock;
+ }
+
+ se_cmd->se_lun = rcu_dereference(deve->se_lun);
se_cmd->pr_res_key = deve->pr_res_key;
se_cmd->orig_fe_lun = unpacked_lun;
+ se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
+ se_cmd->lun_ref_active = true;
}
+out_unlock:
rcu_read_unlock();
if (!se_lun) {
@@ -182,9 +192,6 @@ int transport_lookup_tmr_lun(struct se_cmd *se_cmd, u64 unpacked_lun)
unpacked_lun);
return -ENODEV;
}
- /*
- * XXX: Add percpu se_lun->lun_ref reference count for TMR
- */
se_cmd->se_dev = rcu_dereference_raw(se_lun->lun_se_dev);
se_tmr->tmr_dev = rcu_dereference_raw(se_lun->lun_se_dev);
@@ -756,19 +763,16 @@ struct se_device *target_alloc_device(struct se_hba *hba, const char *name)
if (!dev)
return NULL;
- dev->dev_link_magic = SE_DEV_LINK_MAGIC;
dev->se_hba = hba;
dev->transport = hba->backend->ops;
dev->prot_length = sizeof(struct t10_pi_tuple);
dev->hba_index = hba->hba_index;
- INIT_LIST_HEAD(&dev->dev_list);
INIT_LIST_HEAD(&dev->dev_sep_list);
INIT_LIST_HEAD(&dev->dev_tmr_list);
INIT_LIST_HEAD(&dev->delayed_cmd_list);
INIT_LIST_HEAD(&dev->state_list);
INIT_LIST_HEAD(&dev->qf_cmd_list);
- INIT_LIST_HEAD(&dev->g_dev_node);
spin_lock_init(&dev->execute_task_lock);
spin_lock_init(&dev->delayed_cmd_lock);
spin_lock_init(&dev->dev_reservation_lock);
@@ -851,7 +855,7 @@ bool target_configure_unmap_from_queue(struct se_dev_attrib *attrib,
attrib->unmap_granularity = q->limits.discard_granularity / block_size;
attrib->unmap_granularity_alignment = q->limits.discard_alignment /
block_size;
- attrib->unmap_zeroes_data = 0;
+ attrib->unmap_zeroes_data = (q->limits.max_write_zeroes_sectors);
return true;
}
EXPORT_SYMBOL(target_configure_unmap_from_queue);
@@ -875,10 +879,79 @@ sector_t target_to_linux_sector(struct se_device *dev, sector_t lb)
}
EXPORT_SYMBOL(target_to_linux_sector);
+/**
+ * target_find_device - find a se_device by its dev_index
+ * @id: dev_index
+ * @do_depend: true if caller needs target_depend_item to be done
+ *
+ * If do_depend is true, the caller must do a target_undepend_item
+ * when finished using the device.
+ *
+ * If do_depend is false, the caller must be called in a configfs
+ * callback or during removal.
+ */
+struct se_device *target_find_device(int id, bool do_depend)
+{
+ struct se_device *dev;
+
+ mutex_lock(&device_mutex);
+ dev = idr_find(&devices_idr, id);
+ if (dev && do_depend && target_depend_item(&dev->dev_group.cg_item))
+ dev = NULL;
+ mutex_unlock(&device_mutex);
+ return dev;
+}
+EXPORT_SYMBOL(target_find_device);
+
+struct devices_idr_iter {
+ int (*fn)(struct se_device *dev, void *data);
+ void *data;
+};
+
+static int target_devices_idr_iter(int id, void *p, void *data)
+{
+ struct devices_idr_iter *iter = data;
+ struct se_device *dev = p;
+
+ /*
+ * We add the device early to the idr, so it can be used
+ * by backend modules during configuration. We do not want
+ * to allow other callers to access partially setup devices,
+ * so we skip them here.
+ */
+ if (!(dev->dev_flags & DF_CONFIGURED))
+ return 0;
+
+ return iter->fn(dev, iter->data);
+}
+
+/**
+ * target_for_each_device - iterate over configured devices
+ * @fn: iterator function
+ * @data: pointer to data that will be passed to fn
+ *
+ * fn must return 0 to continue looping over devices. non-zero will break
+ * from the loop and return that value to the caller.
+ */
+int target_for_each_device(int (*fn)(struct se_device *dev, void *data),
+ void *data)
+{
+ struct devices_idr_iter iter;
+ int ret;
+
+ iter.fn = fn;
+ iter.data = data;
+
+ mutex_lock(&device_mutex);
+ ret = idr_for_each(&devices_idr, target_devices_idr_iter, &iter);
+ mutex_unlock(&device_mutex);
+ return ret;
+}
+
int target_configure_device(struct se_device *dev)
{
struct se_hba *hba = dev->se_hba;
- int ret;
+ int ret, id;
if (dev->dev_flags & DF_CONFIGURED) {
pr_err("se_dev->se_dev_ptr already set for storage"
@@ -886,9 +959,26 @@ int target_configure_device(struct se_device *dev)
return -EEXIST;
}
+ /*
+ * Add early so modules like tcmu can use during its
+ * configuration.
+ */
+ mutex_lock(&device_mutex);
+ /*
+ * Use cyclic to try and avoid collisions with devices
+ * that were recently removed.
+ */
+ id = idr_alloc_cyclic(&devices_idr, dev, 0, INT_MAX, GFP_KERNEL);
+ mutex_unlock(&device_mutex);
+ if (id < 0) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ dev->dev_index = id;
+
ret = dev->transport->configure_device(dev);
if (ret)
- goto out;
+ goto out_free_index;
/*
* XXX: there is not much point to have two different values here..
*/
@@ -903,12 +993,11 @@ int target_configure_device(struct se_device *dev)
dev->dev_attrib.hw_block_size);
dev->dev_attrib.optimal_sectors = dev->dev_attrib.hw_max_sectors;
- dev->dev_index = scsi_get_new_index(SCSI_DEVICE_INDEX);
dev->creation_time = get_jiffies_64();
ret = core_setup_alua(dev);
if (ret)
- goto out;
+ goto out_free_index;
/*
* Startup the struct se_device processing thread
@@ -946,16 +1035,16 @@ int target_configure_device(struct se_device *dev)
hba->dev_count++;
spin_unlock(&hba->device_lock);
- mutex_lock(&g_device_mutex);
- list_add_tail(&dev->g_dev_node, &g_device_list);
- mutex_unlock(&g_device_mutex);
-
dev->dev_flags |= DF_CONFIGURED;
return 0;
out_free_alua:
core_alua_free_lu_gp_mem(dev);
+out_free_index:
+ mutex_lock(&device_mutex);
+ idr_remove(&devices_idr, dev->dev_index);
+ mutex_unlock(&device_mutex);
out:
se_release_vpd_for_dev(dev);
return ret;
@@ -970,9 +1059,11 @@ void target_free_device(struct se_device *dev)
if (dev->dev_flags & DF_CONFIGURED) {
destroy_workqueue(dev->tmr_wq);
- mutex_lock(&g_device_mutex);
- list_del(&dev->g_dev_node);
- mutex_unlock(&g_device_mutex);
+ dev->transport->destroy_device(dev);
+
+ mutex_lock(&device_mutex);
+ idr_remove(&devices_idr, dev->dev_index);
+ mutex_unlock(&device_mutex);
spin_lock(&hba->device_lock);
hba->dev_count--;
@@ -1087,19 +1178,19 @@ passthrough_parse_cdb(struct se_cmd *cmd,
TRANSPORT_FLAG_PASSTHROUGH_PGR)) {
if (cdb[0] == PERSISTENT_RESERVE_IN) {
cmd->execute_cmd = target_scsi3_emulate_pr_in;
- size = (cdb[7] << 8) + cdb[8];
+ size = get_unaligned_be16(&cdb[7]);
return target_cmd_size_check(cmd, size);
}
if (cdb[0] == PERSISTENT_RESERVE_OUT) {
cmd->execute_cmd = target_scsi3_emulate_pr_out;
- size = (cdb[7] << 8) + cdb[8];
+ size = get_unaligned_be32(&cdb[5]);
return target_cmd_size_check(cmd, size);
}
if (cdb[0] == RELEASE || cdb[0] == RELEASE_10) {
cmd->execute_cmd = target_scsi2_reservation_release;
if (cdb[0] == RELEASE_10)
- size = (cdb[7] << 8) | cdb[8];
+ size = get_unaligned_be16(&cdb[7]);
else
size = cmd->data_length;
return target_cmd_size_check(cmd, size);
@@ -1107,7 +1198,7 @@ passthrough_parse_cdb(struct se_cmd *cmd,
if (cdb[0] == RESERVE || cdb[0] == RESERVE_10) {
cmd->execute_cmd = target_scsi2_reservation_reserve;
if (cdb[0] == RESERVE_10)
- size = (cdb[7] << 8) | cdb[8];
+ size = get_unaligned_be16(&cdb[7]);
else
size = cmd->data_length;
return target_cmd_size_check(cmd, size);
@@ -1126,7 +1217,7 @@ passthrough_parse_cdb(struct se_cmd *cmd,
case WRITE_16:
case WRITE_VERIFY:
case WRITE_VERIFY_12:
- case 0x8e: /* WRITE_VERIFY_16 */
+ case WRITE_VERIFY_16:
case COMPARE_AND_WRITE:
case XDWRITEREAD_10:
cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
@@ -1135,7 +1226,7 @@ passthrough_parse_cdb(struct se_cmd *cmd,
switch (get_unaligned_be16(&cdb[8])) {
case READ_32:
case WRITE_32:
- case 0x0c: /* WRITE_VERIFY_32 */
+ case WRITE_VERIFY_32:
case XDWRITEREAD_32:
cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
break;
diff --git a/drivers/target/target_core_fabric_configfs.c b/drivers/target/target_core_fabric_configfs.c
index d1e6cab8e3d3..e9e917cc6441 100644
--- a/drivers/target/target_core_fabric_configfs.c
+++ b/drivers/target/target_core_fabric_configfs.c
@@ -65,6 +65,8 @@ static void target_fabric_setup_##_name##_cit(struct target_fabric_configfs *tf)
pr_debug("Setup generic %s\n", __stringify(_name)); \
}
+static struct configfs_item_operations target_fabric_port_item_ops;
+
/* Start of tfc_tpg_mappedlun_cit */
static int target_fabric_mappedlun_link(
@@ -72,19 +74,20 @@ static int target_fabric_mappedlun_link(
struct config_item *lun_ci)
{
struct se_dev_entry *deve;
- struct se_lun *lun = container_of(to_config_group(lun_ci),
- struct se_lun, lun_group);
+ struct se_lun *lun;
struct se_lun_acl *lacl = container_of(to_config_group(lun_acl_ci),
struct se_lun_acl, se_lun_group);
struct se_portal_group *se_tpg;
struct config_item *nacl_ci, *tpg_ci, *tpg_ci_s, *wwn_ci, *wwn_ci_s;
bool lun_access_ro;
- if (lun->lun_link_magic != SE_LUN_LINK_MAGIC) {
- pr_err("Bad lun->lun_link_magic, not a valid lun_ci pointer:"
- " %p to struct lun: %p\n", lun_ci, lun);
+ if (!lun_ci->ci_type ||
+ lun_ci->ci_type->ct_item_ops != &target_fabric_port_item_ops) {
+ pr_err("Bad lun_ci, not a valid lun_ci pointer: %p\n", lun_ci);
return -EFAULT;
}
+ lun = container_of(to_config_group(lun_ci), struct se_lun, lun_group);
+
/*
* Ensure that the source port exists
*/
@@ -620,6 +623,8 @@ static struct configfs_attribute *target_fabric_port_attrs[] = {
NULL,
};
+extern struct configfs_item_operations target_core_dev_item_ops;
+
static int target_fabric_port_link(
struct config_item *lun_ci,
struct config_item *se_dev_ci)
@@ -628,16 +633,16 @@ static int target_fabric_port_link(
struct se_lun *lun = container_of(to_config_group(lun_ci),
struct se_lun, lun_group);
struct se_portal_group *se_tpg;
- struct se_device *dev =
- container_of(to_config_group(se_dev_ci), struct se_device, dev_group);
+ struct se_device *dev;
struct target_fabric_configfs *tf;
int ret;
- if (dev->dev_link_magic != SE_DEV_LINK_MAGIC) {
- pr_err("Bad dev->dev_link_magic, not a valid se_dev_ci pointer:"
- " %p to struct se_device: %p\n", se_dev_ci, dev);
+ if (!se_dev_ci->ci_type ||
+ se_dev_ci->ci_type->ct_item_ops != &target_core_dev_item_ops) {
+ pr_err("Bad se_dev_ci, not a valid se_dev_ci pointer: %p\n", se_dev_ci);
return -EFAULT;
}
+ dev = container_of(to_config_group(se_dev_ci), struct se_device, dev_group);
if (!(dev->dev_flags & DF_CONFIGURED)) {
pr_err("se_device not configured yet, cannot port link\n");
diff --git a/drivers/target/target_core_fabric_lib.c b/drivers/target/target_core_fabric_lib.c
index cb6497ce4b61..508da345b73f 100644
--- a/drivers/target/target_core_fabric_lib.c
+++ b/drivers/target/target_core_fabric_lib.c
@@ -34,6 +34,7 @@
#include <linux/ctype.h>
#include <linux/spinlock.h>
#include <linux/export.h>
+#include <asm/unaligned.h>
#include <scsi/scsi_proto.h>
@@ -216,8 +217,7 @@ static int iscsi_get_pr_transport_id(
if (padding != 0)
len += padding;
- buf[2] = ((len >> 8) & 0xff);
- buf[3] = (len & 0xff);
+ put_unaligned_be16(len, &buf[2]);
/*
* Increment value for total payload + header length for
* full status descriptor
@@ -306,7 +306,7 @@ static char *iscsi_parse_pr_out_transport_id(
*/
if (out_tid_len) {
/* The shift works thanks to integer promotion rules */
- add_len = (buf[2] << 8) | buf[3];
+ add_len = get_unaligned_be16(&buf[2]);
tid_len = strlen(&buf[4]);
tid_len += 4; /* Add four bytes for iSCSI Transport ID header */
diff --git a/drivers/target/target_core_file.c b/drivers/target/target_core_file.c
index e921948415c7..24cf11d9e50a 100644
--- a/drivers/target/target_core_file.c
+++ b/drivers/target/target_core_file.c
@@ -237,13 +237,17 @@ static void fd_dev_call_rcu(struct rcu_head *p)
static void fd_free_device(struct se_device *dev)
{
+ call_rcu(&dev->rcu_head, fd_dev_call_rcu);
+}
+
+static void fd_destroy_device(struct se_device *dev)
+{
struct fd_dev *fd_dev = FD_DEV(dev);
if (fd_dev->fd_file) {
filp_close(fd_dev->fd_file, NULL);
fd_dev->fd_file = NULL;
}
- call_rcu(&dev->rcu_head, fd_dev_call_rcu);
}
static int fd_do_rw(struct se_cmd *cmd, struct file *fd,
@@ -826,6 +830,7 @@ static const struct target_backend_ops fileio_ops = {
.detach_hba = fd_detach_hba,
.alloc_device = fd_alloc_device,
.configure_device = fd_configure_device,
+ .destroy_device = fd_destroy_device,
.free_device = fd_free_device,
.parse_cdb = fd_parse_cdb,
.set_configfs_dev_params = fd_set_configfs_dev_params,
diff --git a/drivers/target/target_core_iblock.c b/drivers/target/target_core_iblock.c
index c05d38016556..ee7c7fa55dad 100644
--- a/drivers/target/target_core_iblock.c
+++ b/drivers/target/target_core_iblock.c
@@ -86,6 +86,7 @@ static int iblock_configure_device(struct se_device *dev)
struct block_device *bd = NULL;
struct blk_integrity *bi;
fmode_t mode;
+ unsigned int max_write_zeroes_sectors;
int ret = -ENOMEM;
if (!(ib_dev->ibd_flags & IBDF_HAS_UDEV_PATH)) {
@@ -129,7 +130,11 @@ static int iblock_configure_device(struct se_device *dev)
* Enable write same emulation for IBLOCK and use 0xFFFF as
* the smaller WRITE_SAME(10) only has a two-byte block count.
*/
- dev->dev_attrib.max_write_same_len = 0xFFFF;
+ max_write_zeroes_sectors = bdev_write_zeroes_sectors(bd);
+ if (max_write_zeroes_sectors)
+ dev->dev_attrib.max_write_same_len = max_write_zeroes_sectors;
+ else
+ dev->dev_attrib.max_write_same_len = 0xFFFF;
if (blk_queue_nonrot(q))
dev->dev_attrib.is_nonrot = 1;
@@ -185,14 +190,17 @@ static void iblock_dev_call_rcu(struct rcu_head *p)
static void iblock_free_device(struct se_device *dev)
{
+ call_rcu(&dev->rcu_head, iblock_dev_call_rcu);
+}
+
+static void iblock_destroy_device(struct se_device *dev)
+{
struct iblock_dev *ib_dev = IBLOCK_DEV(dev);
if (ib_dev->ibd_bd != NULL)
blkdev_put(ib_dev->ibd_bd, FMODE_WRITE|FMODE_READ|FMODE_EXCL);
if (ib_dev->ibd_bio_set != NULL)
bioset_free(ib_dev->ibd_bio_set);
-
- call_rcu(&dev->rcu_head, iblock_dev_call_rcu);
}
static unsigned long long iblock_emulate_read_cap_with_block_size(
@@ -415,28 +423,31 @@ iblock_execute_unmap(struct se_cmd *cmd, sector_t lba, sector_t nolb)
}
static sense_reason_t
-iblock_execute_write_same_direct(struct block_device *bdev, struct se_cmd *cmd)
+iblock_execute_zero_out(struct block_device *bdev, struct se_cmd *cmd)
{
struct se_device *dev = cmd->se_dev;
struct scatterlist *sg = &cmd->t_data_sg[0];
- struct page *page = NULL;
- int ret;
+ unsigned char *buf, zero = 0x00, *p = &zero;
+ int rc, ret;
- if (sg->offset) {
- page = alloc_page(GFP_KERNEL);
- if (!page)
- return TCM_OUT_OF_RESOURCES;
- sg_copy_to_buffer(sg, cmd->t_data_nents, page_address(page),
- dev->dev_attrib.block_size);
- }
+ buf = kmap(sg_page(sg)) + sg->offset;
+ if (!buf)
+ return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+ /*
+ * Fall back to block_execute_write_same() slow-path if
+ * incoming WRITE_SAME payload does not contain zeros.
+ */
+ rc = memcmp(buf, p, cmd->data_length);
+ kunmap(sg_page(sg));
- ret = blkdev_issue_write_same(bdev,
+ if (rc)
+ return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+
+ ret = blkdev_issue_zeroout(bdev,
target_to_linux_sector(dev, cmd->t_task_lba),
target_to_linux_sector(dev,
sbc_get_write_same_sectors(cmd)),
- GFP_KERNEL, page ? page : sg_page(sg));
- if (page)
- __free_page(page);
+ GFP_KERNEL, false);
if (ret)
return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
@@ -472,8 +483,10 @@ iblock_execute_write_same(struct se_cmd *cmd)
return TCM_INVALID_CDB_FIELD;
}
- if (bdev_write_same(bdev))
- return iblock_execute_write_same_direct(bdev, cmd);
+ if (bdev_write_zeroes_sectors(bdev)) {
+ if (!iblock_execute_zero_out(bdev, cmd))
+ return 0;
+ }
ibr = kzalloc(sizeof(struct iblock_req), GFP_KERNEL);
if (!ibr)
@@ -848,6 +861,7 @@ static const struct target_backend_ops iblock_ops = {
.detach_hba = iblock_detach_hba,
.alloc_device = iblock_alloc_device,
.configure_device = iblock_configure_device,
+ .destroy_device = iblock_destroy_device,
.free_device = iblock_free_device,
.parse_cdb = iblock_parse_cdb,
.set_configfs_dev_params = iblock_set_configfs_dev_params,
diff --git a/drivers/target/target_core_internal.h b/drivers/target/target_core_internal.h
index 0912de7c0cf8..f30e8ac13386 100644
--- a/drivers/target/target_core_internal.h
+++ b/drivers/target/target_core_internal.h
@@ -56,9 +56,6 @@ struct target_fabric_configfs {
extern struct t10_alua_lu_gp *default_lu_gp;
/* target_core_device.c */
-extern struct mutex g_device_mutex;
-extern struct list_head g_device_list;
-
int core_alloc_rtpi(struct se_lun *lun, struct se_device *dev);
struct se_dev_entry *core_get_se_deve_from_rtpi(struct se_node_acl *, u16);
void target_pr_kref_release(struct kref *);
@@ -87,6 +84,8 @@ void core_dev_release_virtual_lun0(void);
struct se_device *target_alloc_device(struct se_hba *hba, const char *name);
int target_configure_device(struct se_device *dev);
void target_free_device(struct se_device *);
+int target_for_each_device(int (*fn)(struct se_device *dev, void *data),
+ void *data);
/* target_core_configfs.c */
void target_setup_backend_cits(struct target_backend *);
diff --git a/drivers/target/target_core_pr.c b/drivers/target/target_core_pr.c
index 129ca572673c..6d5def64db61 100644
--- a/drivers/target/target_core_pr.c
+++ b/drivers/target/target_core_pr.c
@@ -1562,10 +1562,7 @@ core_scsi3_decode_spec_i_port(
* first extract TransportID Parameter Data Length, and make sure
* the value matches up to the SCSI expected data transfer length.
*/
- tpdl = (buf[24] & 0xff) << 24;
- tpdl |= (buf[25] & 0xff) << 16;
- tpdl |= (buf[26] & 0xff) << 8;
- tpdl |= buf[27] & 0xff;
+ tpdl = get_unaligned_be32(&buf[24]);
if ((tpdl + 28) != cmd->data_length) {
pr_err("SPC-3 PR: Illegal tpdl: %u + 28 byte header"
@@ -3221,12 +3218,8 @@ core_scsi3_emulate_pro_register_and_move(struct se_cmd *cmd, u64 res_key,
goto out_put_pr_reg;
}
- 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;
+ rtpi = get_unaligned_be16(&buf[18]);
+ tid_len = get_unaligned_be32(&buf[20]);
transport_kunmap_data_sg(cmd);
buf = NULL;
@@ -3552,16 +3545,6 @@ out_put_pr_reg:
return ret;
}
-static unsigned long long core_scsi3_extract_reservation_key(unsigned char *cdb)
-{
- unsigned int __v1, __v2;
-
- __v1 = (cdb[0] << 24) | (cdb[1] << 16) | (cdb[2] << 8) | cdb[3];
- __v2 = (cdb[4] << 24) | (cdb[5] << 16) | (cdb[6] << 8) | cdb[7];
-
- return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32;
-}
-
/*
* See spc4r17 section 6.14 Table 170
*/
@@ -3602,7 +3585,7 @@ target_scsi3_emulate_pr_out(struct se_cmd *cmd)
if (cmd->data_length < 24) {
pr_warn("SPC-PR: Received PR OUT parameter list"
" length too small: %u\n", cmd->data_length);
- return TCM_INVALID_PARAMETER_LIST;
+ return TCM_PARAMETER_LIST_LENGTH_ERROR;
}
/*
@@ -3619,8 +3602,8 @@ target_scsi3_emulate_pr_out(struct se_cmd *cmd)
/*
* From PERSISTENT_RESERVE_OUT parameter list (payload)
*/
- res_key = core_scsi3_extract_reservation_key(&buf[0]);
- sa_res_key = core_scsi3_extract_reservation_key(&buf[8]);
+ res_key = get_unaligned_be64(&buf[0]);
+ sa_res_key = get_unaligned_be64(&buf[8]);
/*
* REGISTER_AND_MOVE uses a different SA parameter list containing
* SCSI TransportIDs.
@@ -3646,7 +3629,7 @@ target_scsi3_emulate_pr_out(struct se_cmd *cmd)
/*
* SPEC_I_PT=1 is only valid for Service action: REGISTER
*/
- if (spec_i_pt && ((cdb[1] & 0x1f) != PRO_REGISTER))
+ if (spec_i_pt && (sa != PRO_REGISTER))
return TCM_INVALID_PARAMETER_LIST;
/*
@@ -3658,11 +3641,11 @@ target_scsi3_emulate_pr_out(struct se_cmd *cmd)
* the sense key set to ILLEGAL REQUEST, and the additional sense
* code set to PARAMETER LIST LENGTH ERROR.
*/
- if (!spec_i_pt && ((cdb[1] & 0x1f) != PRO_REGISTER_AND_MOVE) &&
+ if (!spec_i_pt && (sa != PRO_REGISTER_AND_MOVE) &&
(cmd->data_length != 24)) {
pr_warn("SPC-PR: Received PR OUT illegal parameter"
" list length: %u\n", cmd->data_length);
- return TCM_INVALID_PARAMETER_LIST;
+ return TCM_PARAMETER_LIST_LENGTH_ERROR;
}
/*
@@ -3702,7 +3685,7 @@ target_scsi3_emulate_pr_out(struct se_cmd *cmd)
break;
default:
pr_err("Unknown PERSISTENT_RESERVE_OUT service"
- " action: 0x%02x\n", cdb[1] & 0x1f);
+ " action: 0x%02x\n", sa);
return TCM_INVALID_CDB_FIELD;
}
@@ -3734,10 +3717,7 @@ core_scsi3_pri_read_keys(struct se_cmd *cmd)
if (!buf)
return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
- buf[0] = ((dev->t10_pr.pr_generation >> 24) & 0xff);
- buf[1] = ((dev->t10_pr.pr_generation >> 16) & 0xff);
- buf[2] = ((dev->t10_pr.pr_generation >> 8) & 0xff);
- buf[3] = (dev->t10_pr.pr_generation & 0xff);
+ put_unaligned_be32(dev->t10_pr.pr_generation, buf);
spin_lock(&dev->t10_pr.registration_lock);
list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
@@ -3749,23 +3729,13 @@ core_scsi3_pri_read_keys(struct se_cmd *cmd)
if ((add_len + 8) > (cmd->data_length - 8))
break;
- buf[off++] = ((pr_reg->pr_res_key >> 56) & 0xff);
- buf[off++] = ((pr_reg->pr_res_key >> 48) & 0xff);
- buf[off++] = ((pr_reg->pr_res_key >> 40) & 0xff);
- buf[off++] = ((pr_reg->pr_res_key >> 32) & 0xff);
- buf[off++] = ((pr_reg->pr_res_key >> 24) & 0xff);
- buf[off++] = ((pr_reg->pr_res_key >> 16) & 0xff);
- buf[off++] = ((pr_reg->pr_res_key >> 8) & 0xff);
- buf[off++] = (pr_reg->pr_res_key & 0xff);
-
+ put_unaligned_be64(pr_reg->pr_res_key, &buf[off]);
+ off += 8;
add_len += 8;
}
spin_unlock(&dev->t10_pr.registration_lock);
- buf[4] = ((add_len >> 24) & 0xff);
- buf[5] = ((add_len >> 16) & 0xff);
- buf[6] = ((add_len >> 8) & 0xff);
- buf[7] = (add_len & 0xff);
+ put_unaligned_be32(add_len, &buf[4]);
transport_kunmap_data_sg(cmd);
@@ -3796,10 +3766,7 @@ core_scsi3_pri_read_reservation(struct se_cmd *cmd)
if (!buf)
return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
- buf[0] = ((dev->t10_pr.pr_generation >> 24) & 0xff);
- buf[1] = ((dev->t10_pr.pr_generation >> 16) & 0xff);
- buf[2] = ((dev->t10_pr.pr_generation >> 8) & 0xff);
- buf[3] = (dev->t10_pr.pr_generation & 0xff);
+ put_unaligned_be32(dev->t10_pr.pr_generation, &buf[0]);
spin_lock(&dev->dev_reservation_lock);
pr_reg = dev->dev_pr_res_holder;
@@ -3807,10 +3774,7 @@ core_scsi3_pri_read_reservation(struct se_cmd *cmd)
/*
* Set the hardcoded Additional Length
*/
- buf[4] = ((add_len >> 24) & 0xff);
- buf[5] = ((add_len >> 16) & 0xff);
- buf[6] = ((add_len >> 8) & 0xff);
- buf[7] = (add_len & 0xff);
+ put_unaligned_be32(add_len, &buf[4]);
if (cmd->data_length < 22)
goto err;
@@ -3837,14 +3801,7 @@ core_scsi3_pri_read_reservation(struct se_cmd *cmd)
else
pr_res_key = pr_reg->pr_res_key;
- buf[8] = ((pr_res_key >> 56) & 0xff);
- buf[9] = ((pr_res_key >> 48) & 0xff);
- buf[10] = ((pr_res_key >> 40) & 0xff);
- buf[11] = ((pr_res_key >> 32) & 0xff);
- buf[12] = ((pr_res_key >> 24) & 0xff);
- buf[13] = ((pr_res_key >> 16) & 0xff);
- buf[14] = ((pr_res_key >> 8) & 0xff);
- buf[15] = (pr_res_key & 0xff);
+ put_unaligned_be64(pr_res_key, &buf[8]);
/*
* Set the SCOPE and TYPE
*/
@@ -3882,8 +3839,7 @@ core_scsi3_pri_report_capabilities(struct se_cmd *cmd)
if (!buf)
return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
- buf[0] = ((add_len >> 8) & 0xff);
- buf[1] = (add_len & 0xff);
+ put_unaligned_be16(add_len, &buf[0]);
buf[2] |= 0x10; /* CRH: Compatible Reservation Hanlding bit. */
buf[2] |= 0x08; /* SIP_C: Specify Initiator Ports Capable bit */
buf[2] |= 0x04; /* ATP_C: All Target Ports Capable bit */
@@ -3947,10 +3903,7 @@ core_scsi3_pri_read_full_status(struct se_cmd *cmd)
if (!buf)
return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
- buf[0] = ((dev->t10_pr.pr_generation >> 24) & 0xff);
- buf[1] = ((dev->t10_pr.pr_generation >> 16) & 0xff);
- buf[2] = ((dev->t10_pr.pr_generation >> 8) & 0xff);
- buf[3] = (dev->t10_pr.pr_generation & 0xff);
+ put_unaligned_be32(dev->t10_pr.pr_generation, &buf[0]);
spin_lock(&dev->dev_reservation_lock);
if (dev->dev_pr_res_holder) {
@@ -3992,14 +3945,8 @@ core_scsi3_pri_read_full_status(struct se_cmd *cmd)
/*
* Set RESERVATION KEY
*/
- buf[off++] = ((pr_reg->pr_res_key >> 56) & 0xff);
- buf[off++] = ((pr_reg->pr_res_key >> 48) & 0xff);
- buf[off++] = ((pr_reg->pr_res_key >> 40) & 0xff);
- buf[off++] = ((pr_reg->pr_res_key >> 32) & 0xff);
- buf[off++] = ((pr_reg->pr_res_key >> 24) & 0xff);
- buf[off++] = ((pr_reg->pr_res_key >> 16) & 0xff);
- buf[off++] = ((pr_reg->pr_res_key >> 8) & 0xff);
- buf[off++] = (pr_reg->pr_res_key & 0xff);
+ put_unaligned_be64(pr_reg->pr_res_key, &buf[off]);
+ off += 8;
off += 4; /* Skip Over Reserved area */
/*
@@ -4041,8 +3988,8 @@ core_scsi3_pri_read_full_status(struct se_cmd *cmd)
if (!pr_reg->pr_reg_all_tg_pt) {
u16 sep_rtpi = pr_reg->tg_pt_sep_rtpi;
- buf[off++] = ((sep_rtpi >> 8) & 0xff);
- buf[off++] = (sep_rtpi & 0xff);
+ put_unaligned_be16(sep_rtpi, &buf[off]);
+ off += 2;
} else
off += 2; /* Skip over RELATIVE TARGET PORT IDENTIFIER */
@@ -4062,10 +4009,7 @@ core_scsi3_pri_read_full_status(struct se_cmd *cmd)
/*
* Set the ADDITIONAL DESCRIPTOR LENGTH
*/
- buf[off++] = ((desc_len >> 24) & 0xff);
- buf[off++] = ((desc_len >> 16) & 0xff);
- buf[off++] = ((desc_len >> 8) & 0xff);
- buf[off++] = (desc_len & 0xff);
+ put_unaligned_be32(desc_len, &buf[off]);
/*
* Size of full desctipor header minus TransportID
* containing $FABRIC_MOD specific) initiator device/port
@@ -4082,10 +4026,7 @@ core_scsi3_pri_read_full_status(struct se_cmd *cmd)
/*
* Set ADDITIONAL_LENGTH
*/
- buf[4] = ((add_len >> 24) & 0xff);
- buf[5] = ((add_len >> 16) & 0xff);
- buf[6] = ((add_len >> 8) & 0xff);
- buf[7] = (add_len & 0xff);
+ put_unaligned_be32(add_len, &buf[4]);
transport_kunmap_data_sg(cmd);
diff --git a/drivers/target/target_core_pscsi.c b/drivers/target/target_core_pscsi.c
index ceec0211e84e..7c69b4a9694d 100644
--- a/drivers/target/target_core_pscsi.c
+++ b/drivers/target/target_core_pscsi.c
@@ -168,7 +168,7 @@ static void pscsi_tape_read_blocksize(struct se_device *dev,
/*
* If MODE_SENSE still returns zero, set the default value to 1024.
*/
- sdev->sector_size = (buf[9] << 16) | (buf[10] << 8) | (buf[11]);
+ sdev->sector_size = get_unaligned_be24(&buf[9]);
out_free:
if (!sdev->sector_size)
sdev->sector_size = 1024;
@@ -209,8 +209,7 @@ pscsi_get_inquiry_vpd_serial(struct scsi_device *sdev, struct t10_wwn *wwn)
cdb[0] = INQUIRY;
cdb[1] = 0x01; /* Query VPD */
cdb[2] = 0x80; /* Unit Serial Number */
- cdb[3] = (INQUIRY_VPD_SERIAL_LEN >> 8) & 0xff;
- cdb[4] = (INQUIRY_VPD_SERIAL_LEN & 0xff);
+ put_unaligned_be16(INQUIRY_VPD_SERIAL_LEN, &cdb[3]);
ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf,
INQUIRY_VPD_SERIAL_LEN, NULL, HZ, 1, NULL);
@@ -245,8 +244,7 @@ pscsi_get_inquiry_vpd_device_ident(struct scsi_device *sdev,
cdb[0] = INQUIRY;
cdb[1] = 0x01; /* Query VPD */
cdb[2] = 0x83; /* Device Identifier */
- cdb[3] = (INQUIRY_VPD_DEVICE_IDENTIFIER_LEN >> 8) & 0xff;
- cdb[4] = (INQUIRY_VPD_DEVICE_IDENTIFIER_LEN & 0xff);
+ put_unaligned_be16(INQUIRY_VPD_DEVICE_IDENTIFIER_LEN, &cdb[3]);
ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf,
INQUIRY_VPD_DEVICE_IDENTIFIER_LEN,
@@ -254,7 +252,7 @@ pscsi_get_inquiry_vpd_device_ident(struct scsi_device *sdev,
if (ret)
goto out;
- page_len = (buf[2] << 8) | buf[3];
+ page_len = get_unaligned_be16(&buf[2]);
while (page_len > 0) {
/* Grab a pointer to the Identification descriptor */
page_83 = &buf[off];
@@ -384,7 +382,7 @@ static int pscsi_create_type_disk(struct se_device *dev, struct scsi_device *sd)
spin_unlock_irq(sh->host_lock);
/*
* Claim exclusive struct block_device access to struct scsi_device
- * for TYPE_DISK using supplied udev_path
+ * for TYPE_DISK and TYPE_ZBC using supplied udev_path
*/
bd = blkdev_get_by_path(dev->udev_path,
FMODE_WRITE|FMODE_READ|FMODE_EXCL, pdv);
@@ -402,8 +400,9 @@ static int pscsi_create_type_disk(struct se_device *dev, struct scsi_device *sd)
return ret;
}
- pr_debug("CORE_PSCSI[%d] - Added TYPE_DISK for %d:%d:%d:%llu\n",
- phv->phv_host_id, sh->host_no, sd->channel, sd->id, sd->lun);
+ pr_debug("CORE_PSCSI[%d] - Added TYPE_%s for %d:%d:%d:%llu\n",
+ phv->phv_host_id, sd->type == TYPE_DISK ? "DISK" : "ZBC",
+ sh->host_no, sd->channel, sd->id, sd->lun);
return 0;
}
@@ -522,6 +521,7 @@ static int pscsi_configure_device(struct se_device *dev)
*/
switch (sd->type) {
case TYPE_DISK:
+ case TYPE_ZBC:
ret = pscsi_create_type_disk(dev, sd);
break;
default:
@@ -566,6 +566,11 @@ static void pscsi_dev_call_rcu(struct rcu_head *p)
static void pscsi_free_device(struct se_device *dev)
{
+ call_rcu(&dev->rcu_head, pscsi_dev_call_rcu);
+}
+
+static void pscsi_destroy_device(struct se_device *dev)
+{
struct pscsi_dev_virt *pdv = PSCSI_DEV(dev);
struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr;
struct scsi_device *sd = pdv->pdv_sd;
@@ -573,9 +578,11 @@ static void pscsi_free_device(struct se_device *dev)
if (sd) {
/*
* Release exclusive pSCSI internal struct block_device claim for
- * struct scsi_device with TYPE_DISK from pscsi_create_type_disk()
+ * struct scsi_device with TYPE_DISK or TYPE_ZBC
+ * from pscsi_create_type_disk()
*/
- if ((sd->type == TYPE_DISK) && pdv->pdv_bd) {
+ if ((sd->type == TYPE_DISK || sd->type == TYPE_ZBC) &&
+ pdv->pdv_bd) {
blkdev_put(pdv->pdv_bd,
FMODE_WRITE|FMODE_READ|FMODE_EXCL);
pdv->pdv_bd = NULL;
@@ -594,15 +601,13 @@ static void pscsi_free_device(struct se_device *dev)
pdv->pdv_sd = NULL;
}
- call_rcu(&dev->rcu_head, pscsi_dev_call_rcu);
}
-static void pscsi_transport_complete(struct se_cmd *cmd, struct scatterlist *sg,
- unsigned char *sense_buffer)
+static void pscsi_complete_cmd(struct se_cmd *cmd, u8 scsi_status,
+ unsigned char *req_sense)
{
struct pscsi_dev_virt *pdv = PSCSI_DEV(cmd->se_dev);
struct scsi_device *sd = pdv->pdv_sd;
- int result;
struct pscsi_plugin_task *pt = cmd->priv;
unsigned char *cdb;
/*
@@ -613,7 +618,6 @@ static void pscsi_transport_complete(struct se_cmd *cmd, struct scatterlist *sg,
return;
cdb = &pt->pscsi_cdb[0];
- result = pt->pscsi_result;
/*
* Hack to make sure that Write-Protect modepage is set if R/O mode is
* forced.
@@ -622,7 +626,7 @@ static void pscsi_transport_complete(struct se_cmd *cmd, struct scatterlist *sg,
goto after_mode_sense;
if (((cdb[0] == MODE_SENSE) || (cdb[0] == MODE_SENSE_10)) &&
- (status_byte(result) << 1) == SAM_STAT_GOOD) {
+ scsi_status == SAM_STAT_GOOD) {
bool read_only = target_lun_is_rdonly(cmd);
if (read_only) {
@@ -657,40 +661,36 @@ after_mode_sense:
* storage engine.
*/
if (((cdb[0] == MODE_SELECT) || (cdb[0] == MODE_SELECT_10)) &&
- (status_byte(result) << 1) == SAM_STAT_GOOD) {
+ scsi_status == SAM_STAT_GOOD) {
unsigned char *buf;
u16 bdl;
u32 blocksize;
- buf = sg_virt(&sg[0]);
+ buf = sg_virt(&cmd->t_data_sg[0]);
if (!buf) {
pr_err("Unable to get buf for scatterlist\n");
goto after_mode_select;
}
if (cdb[0] == MODE_SELECT)
- bdl = (buf[3]);
+ bdl = buf[3];
else
- bdl = (buf[6] << 8) | (buf[7]);
+ bdl = get_unaligned_be16(&buf[6]);
if (!bdl)
goto after_mode_select;
if (cdb[0] == MODE_SELECT)
- blocksize = (buf[9] << 16) | (buf[10] << 8) |
- (buf[11]);
+ blocksize = get_unaligned_be24(&buf[9]);
else
- blocksize = (buf[13] << 16) | (buf[14] << 8) |
- (buf[15]);
+ blocksize = get_unaligned_be24(&buf[13]);
sd->sector_size = blocksize;
}
after_mode_select:
- if (sense_buffer && (status_byte(result) & CHECK_CONDITION)) {
- memcpy(sense_buffer, pt->pscsi_sense, TRANSPORT_SENSE_BUFFER);
- cmd->se_cmd_flags |= SCF_TRANSPORT_TASK_SENSE;
- }
+ if (scsi_status == SAM_STAT_CHECK_CONDITION)
+ transport_copy_sense_to_cmd(cmd, req_sense);
}
enum {
@@ -1002,7 +1002,8 @@ pscsi_execute_cmd(struct se_cmd *cmd)
req->end_io_data = cmd;
scsi_req(req)->cmd_len = scsi_command_size(pt->pscsi_cdb);
scsi_req(req)->cmd = &pt->pscsi_cdb[0];
- if (pdv->pdv_sd->type == TYPE_DISK)
+ if (pdv->pdv_sd->type == TYPE_DISK ||
+ pdv->pdv_sd->type == TYPE_ZBC)
req->timeout = PS_TIMEOUT_DISK;
else
req->timeout = PS_TIMEOUT_OTHER;
@@ -1047,30 +1048,29 @@ static void pscsi_req_done(struct request *req, blk_status_t status)
{
struct se_cmd *cmd = req->end_io_data;
struct pscsi_plugin_task *pt = cmd->priv;
+ int result = scsi_req(req)->result;
+ u8 scsi_status = status_byte(result) << 1;
- pt->pscsi_result = scsi_req(req)->result;
- pt->pscsi_resid = scsi_req(req)->resid_len;
-
- cmd->scsi_status = status_byte(pt->pscsi_result) << 1;
- if (cmd->scsi_status) {
+ if (scsi_status) {
pr_debug("PSCSI Status Byte exception at cmd: %p CDB:"
" 0x%02x Result: 0x%08x\n", cmd, pt->pscsi_cdb[0],
- pt->pscsi_result);
+ result);
}
- switch (host_byte(pt->pscsi_result)) {
+ pscsi_complete_cmd(cmd, scsi_status, scsi_req(req)->sense);
+
+ switch (host_byte(result)) {
case DID_OK:
- target_complete_cmd(cmd, cmd->scsi_status);
+ target_complete_cmd(cmd, scsi_status);
break;
default:
pr_debug("PSCSI Host Byte exception at cmd: %p CDB:"
" 0x%02x Result: 0x%08x\n", cmd, pt->pscsi_cdb[0],
- pt->pscsi_result);
+ result);
target_complete_cmd(cmd, SAM_STAT_CHECK_CONDITION);
break;
}
- memcpy(pt->pscsi_sense, scsi_req(req)->sense, TRANSPORT_SENSE_BUFFER);
__blk_put_request(req->q, req);
kfree(pt);
}
@@ -1086,8 +1086,8 @@ static const struct target_backend_ops pscsi_ops = {
.pmode_enable_hba = pscsi_pmode_enable_hba,
.alloc_device = pscsi_alloc_device,
.configure_device = pscsi_configure_device,
+ .destroy_device = pscsi_destroy_device,
.free_device = pscsi_free_device,
- .transport_complete = pscsi_transport_complete,
.parse_cdb = pscsi_parse_cdb,
.set_configfs_dev_params = pscsi_set_configfs_dev_params,
.show_configfs_dev_params = pscsi_show_configfs_dev_params,
diff --git a/drivers/target/target_core_pscsi.h b/drivers/target/target_core_pscsi.h
index 8a02fa47c7e8..b86fb0e1b783 100644
--- a/drivers/target/target_core_pscsi.h
+++ b/drivers/target/target_core_pscsi.h
@@ -23,10 +23,6 @@ struct scsi_device;
struct Scsi_Host;
struct pscsi_plugin_task {
- unsigned char pscsi_sense[TRANSPORT_SENSE_BUFFER];
- int pscsi_direction;
- int pscsi_result;
- u32 pscsi_resid;
unsigned char pscsi_cdb[0];
} ____cacheline_aligned;
diff --git a/drivers/target/target_core_rd.c b/drivers/target/target_core_rd.c
index 20253d04103f..a6e8106abd6f 100644
--- a/drivers/target/target_core_rd.c
+++ b/drivers/target/target_core_rd.c
@@ -339,10 +339,14 @@ static void rd_dev_call_rcu(struct rcu_head *p)
static void rd_free_device(struct se_device *dev)
{
+ call_rcu(&dev->rcu_head, rd_dev_call_rcu);
+}
+
+static void rd_destroy_device(struct se_device *dev)
+{
struct rd_dev *rd_dev = RD_DEV(dev);
rd_release_device_space(rd_dev);
- call_rcu(&dev->rcu_head, rd_dev_call_rcu);
}
static struct rd_dev_sg_table *rd_get_sg_table(struct rd_dev *rd_dev, u32 page)
@@ -554,7 +558,7 @@ static ssize_t rd_set_configfs_dev_params(struct se_device *dev,
struct rd_dev *rd_dev = RD_DEV(dev);
char *orig, *ptr, *opts;
substring_t args[MAX_OPT_ARGS];
- int ret = 0, arg, token;
+ int arg, token;
opts = kstrdup(page, GFP_KERNEL);
if (!opts)
@@ -589,7 +593,7 @@ static ssize_t rd_set_configfs_dev_params(struct se_device *dev,
}
kfree(orig);
- return (!ret) ? count : ret;
+ return count;
}
static ssize_t rd_show_configfs_dev_params(struct se_device *dev, char *b)
@@ -651,6 +655,7 @@ static const struct target_backend_ops rd_mcp_ops = {
.detach_hba = rd_detach_hba,
.alloc_device = rd_alloc_device,
.configure_device = rd_configure_device,
+ .destroy_device = rd_destroy_device,
.free_device = rd_free_device,
.parse_cdb = rd_parse_cdb,
.set_configfs_dev_params = rd_set_configfs_dev_params,
diff --git a/drivers/target/target_core_sbc.c b/drivers/target/target_core_sbc.c
index dc9456e7dac9..750a04ed0e93 100644
--- a/drivers/target/target_core_sbc.c
+++ b/drivers/target/target_core_sbc.c
@@ -71,14 +71,8 @@ sbc_emulate_readcapacity(struct se_cmd *cmd)
else
blocks = (u32)blocks_long;
- buf[0] = (blocks >> 24) & 0xff;
- buf[1] = (blocks >> 16) & 0xff;
- buf[2] = (blocks >> 8) & 0xff;
- buf[3] = blocks & 0xff;
- buf[4] = (dev->dev_attrib.block_size >> 24) & 0xff;
- buf[5] = (dev->dev_attrib.block_size >> 16) & 0xff;
- buf[6] = (dev->dev_attrib.block_size >> 8) & 0xff;
- buf[7] = dev->dev_attrib.block_size & 0xff;
+ put_unaligned_be32(blocks, &buf[0]);
+ put_unaligned_be32(dev->dev_attrib.block_size, &buf[4]);
rbuf = transport_kmap_data_sg(cmd);
if (rbuf) {
@@ -102,18 +96,8 @@ sbc_emulate_readcapacity_16(struct se_cmd *cmd)
unsigned long long blocks = dev->transport->get_blocks(dev);
memset(buf, 0, sizeof(buf));
- buf[0] = (blocks >> 56) & 0xff;
- buf[1] = (blocks >> 48) & 0xff;
- buf[2] = (blocks >> 40) & 0xff;
- buf[3] = (blocks >> 32) & 0xff;
- buf[4] = (blocks >> 24) & 0xff;
- buf[5] = (blocks >> 16) & 0xff;
- buf[6] = (blocks >> 8) & 0xff;
- buf[7] = blocks & 0xff;
- buf[8] = (dev->dev_attrib.block_size >> 24) & 0xff;
- buf[9] = (dev->dev_attrib.block_size >> 16) & 0xff;
- buf[10] = (dev->dev_attrib.block_size >> 8) & 0xff;
- buf[11] = dev->dev_attrib.block_size & 0xff;
+ put_unaligned_be64(blocks, &buf[0]);
+ put_unaligned_be32(dev->dev_attrib.block_size, &buf[8]);
/*
* Set P_TYPE and PROT_EN bits for DIF support
*/
@@ -134,8 +118,8 @@ sbc_emulate_readcapacity_16(struct se_cmd *cmd)
if (dev->transport->get_alignment_offset_lbas) {
u16 lalba = dev->transport->get_alignment_offset_lbas(dev);
- buf[14] = (lalba >> 8) & 0x3f;
- buf[15] = lalba & 0xff;
+
+ put_unaligned_be16(lalba, &buf[14]);
}
/*
@@ -262,18 +246,17 @@ static inline u32 transport_get_sectors_6(unsigned char *cdb)
static inline u32 transport_get_sectors_10(unsigned char *cdb)
{
- return (u32)(cdb[7] << 8) + cdb[8];
+ return get_unaligned_be16(&cdb[7]);
}
static inline u32 transport_get_sectors_12(unsigned char *cdb)
{
- return (u32)(cdb[6] << 24) + (cdb[7] << 16) + (cdb[8] << 8) + cdb[9];
+ return get_unaligned_be32(&cdb[6]);
}
static inline u32 transport_get_sectors_16(unsigned char *cdb)
{
- return (u32)(cdb[10] << 24) + (cdb[11] << 16) +
- (cdb[12] << 8) + cdb[13];
+ return get_unaligned_be32(&cdb[10]);
}
/*
@@ -281,29 +264,23 @@ static inline u32 transport_get_sectors_16(unsigned char *cdb)
*/
static inline u32 transport_get_sectors_32(unsigned char *cdb)
{
- return (u32)(cdb[28] << 24) + (cdb[29] << 16) +
- (cdb[30] << 8) + cdb[31];
+ return get_unaligned_be32(&cdb[28]);
}
static inline u32 transport_lba_21(unsigned char *cdb)
{
- return ((cdb[1] & 0x1f) << 16) | (cdb[2] << 8) | cdb[3];
+ return get_unaligned_be24(&cdb[1]) & 0x1fffff;
}
static inline u32 transport_lba_32(unsigned char *cdb)
{
- return (cdb[2] << 24) | (cdb[3] << 16) | (cdb[4] << 8) | cdb[5];
+ return get_unaligned_be32(&cdb[2]);
}
static inline unsigned long long transport_lba_64(unsigned char *cdb)
{
- unsigned int __v1, __v2;
-
- __v1 = (cdb[2] << 24) | (cdb[3] << 16) | (cdb[4] << 8) | cdb[5];
- __v2 = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9];
-
- return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32;
+ return get_unaligned_be64(&cdb[2]);
}
/*
@@ -311,12 +288,7 @@ static inline unsigned long long transport_lba_64(unsigned char *cdb)
*/
static inline unsigned long long transport_lba_64_ext(unsigned char *cdb)
{
- unsigned int __v1, __v2;
-
- __v1 = (cdb[12] << 24) | (cdb[13] << 16) | (cdb[14] << 8) | cdb[15];
- __v2 = (cdb[16] << 24) | (cdb[17] << 16) | (cdb[18] << 8) | cdb[19];
-
- return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32;
+ return get_unaligned_be64(&cdb[12]);
}
static sense_reason_t
@@ -1005,6 +977,12 @@ sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops)
break;
}
case COMPARE_AND_WRITE:
+ if (!dev->dev_attrib.emulate_caw) {
+ pr_err_ratelimited("se_device %s/%s (vpd_unit_serial %s) reject"
+ " COMPARE_AND_WRITE\n", dev->se_hba->backend->ops->name,
+ dev->dev_group.cg_item.ci_name, dev->t10_wwn.unit_serial);
+ return TCM_UNSUPPORTED_SCSI_OPCODE;
+ }
sectors = cdb[13];
/*
* Currently enforce COMPARE_AND_WRITE for a single sector
@@ -1045,8 +1023,7 @@ sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops)
cmd->t_task_cdb[1] & 0x1f);
return TCM_INVALID_CDB_FIELD;
}
- size = (cdb[10] << 24) | (cdb[11] << 16) |
- (cdb[12] << 8) | cdb[13];
+ size = get_unaligned_be32(&cdb[10]);
break;
case SYNCHRONIZE_CACHE:
case SYNCHRONIZE_CACHE_16:
diff --git a/drivers/target/target_core_spc.c b/drivers/target/target_core_spc.c
index 2a91ed3ef380..cb0461a10808 100644
--- a/drivers/target/target_core_spc.c
+++ b/drivers/target/target_core_spc.c
@@ -287,8 +287,8 @@ check_t10_vend_desc:
/* Skip over Obsolete field in RTPI payload
* in Table 472 */
off += 2;
- buf[off++] = ((lun->lun_rtpi >> 8) & 0xff);
- buf[off++] = (lun->lun_rtpi & 0xff);
+ put_unaligned_be16(lun->lun_rtpi, &buf[off]);
+ off += 2;
len += 8; /* Header size + Designation descriptor */
/*
* Target port group identifier, see spc4r17
@@ -316,8 +316,8 @@ check_t10_vend_desc:
off++; /* Skip over Reserved */
buf[off++] = 4; /* DESIGNATOR LENGTH */
off += 2; /* Skip over Reserved Field */
- buf[off++] = ((tg_pt_gp_id >> 8) & 0xff);
- buf[off++] = (tg_pt_gp_id & 0xff);
+ put_unaligned_be16(tg_pt_gp_id, &buf[off]);
+ off += 2;
len += 8; /* Header size + Designation descriptor */
/*
* Logical Unit Group identifier, see spc4r17
@@ -343,8 +343,8 @@ check_lu_gp:
off++; /* Skip over Reserved */
buf[off++] = 4; /* DESIGNATOR LENGTH */
off += 2; /* Skip over Reserved Field */
- buf[off++] = ((lu_gp_id >> 8) & 0xff);
- buf[off++] = (lu_gp_id & 0xff);
+ put_unaligned_be16(lu_gp_id, &buf[off]);
+ off += 2;
len += 8; /* Header size + Designation descriptor */
/*
* SCSI name string designator, see spc4r17
@@ -431,8 +431,7 @@ check_scsi_name:
/* Header size + Designation descriptor */
len += (scsi_target_len + 4);
}
- buf[2] = ((len >> 8) & 0xff);
- buf[3] = (len & 0xff); /* Page Length for VPD 0x83 */
+ put_unaligned_be16(len, &buf[2]); /* Page Length for VPD 0x83 */
return 0;
}
EXPORT_SYMBOL(spc_emulate_evpd_83);
@@ -1288,7 +1287,7 @@ spc_parse_cdb(struct se_cmd *cmd, unsigned int *size)
cmd->execute_cmd = spc_emulate_modeselect;
break;
case MODE_SELECT_10:
- *size = (cdb[7] << 8) + cdb[8];
+ *size = get_unaligned_be16(&cdb[7]);
cmd->execute_cmd = spc_emulate_modeselect;
break;
case MODE_SENSE:
@@ -1296,25 +1295,25 @@ spc_parse_cdb(struct se_cmd *cmd, unsigned int *size)
cmd->execute_cmd = spc_emulate_modesense;
break;
case MODE_SENSE_10:
- *size = (cdb[7] << 8) + cdb[8];
+ *size = get_unaligned_be16(&cdb[7]);
cmd->execute_cmd = spc_emulate_modesense;
break;
case LOG_SELECT:
case LOG_SENSE:
- *size = (cdb[7] << 8) + cdb[8];
+ *size = get_unaligned_be16(&cdb[7]);
break;
case PERSISTENT_RESERVE_IN:
- *size = (cdb[7] << 8) + cdb[8];
+ *size = get_unaligned_be16(&cdb[7]);
cmd->execute_cmd = target_scsi3_emulate_pr_in;
break;
case PERSISTENT_RESERVE_OUT:
- *size = (cdb[7] << 8) + cdb[8];
+ *size = get_unaligned_be32(&cdb[5]);
cmd->execute_cmd = target_scsi3_emulate_pr_out;
break;
case RELEASE:
case RELEASE_10:
if (cdb[0] == RELEASE_10)
- *size = (cdb[7] << 8) | cdb[8];
+ *size = get_unaligned_be16(&cdb[7]);
else
*size = cmd->data_length;
@@ -1327,7 +1326,7 @@ spc_parse_cdb(struct se_cmd *cmd, unsigned int *size)
* Assume the passthrough or $FABRIC_MOD will tell us about it.
*/
if (cdb[0] == RESERVE_10)
- *size = (cdb[7] << 8) | cdb[8];
+ *size = get_unaligned_be16(&cdb[7]);
else
*size = cmd->data_length;
@@ -1338,7 +1337,7 @@ spc_parse_cdb(struct se_cmd *cmd, unsigned int *size)
cmd->execute_cmd = spc_emulate_request_sense;
break;
case INQUIRY:
- *size = (cdb[3] << 8) + cdb[4];
+ *size = get_unaligned_be16(&cdb[3]);
/*
* Do implicit HEAD_OF_QUEUE processing for INQUIRY.
@@ -1349,7 +1348,7 @@ spc_parse_cdb(struct se_cmd *cmd, unsigned int *size)
break;
case SECURITY_PROTOCOL_IN:
case SECURITY_PROTOCOL_OUT:
- *size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9];
+ *size = get_unaligned_be32(&cdb[6]);
break;
case EXTENDED_COPY:
*size = get_unaligned_be32(&cdb[10]);
@@ -1361,19 +1360,18 @@ spc_parse_cdb(struct se_cmd *cmd, unsigned int *size)
break;
case READ_ATTRIBUTE:
case WRITE_ATTRIBUTE:
- *size = (cdb[10] << 24) | (cdb[11] << 16) |
- (cdb[12] << 8) | cdb[13];
+ *size = get_unaligned_be32(&cdb[10]);
break;
case RECEIVE_DIAGNOSTIC:
case SEND_DIAGNOSTIC:
- *size = (cdb[3] << 8) | cdb[4];
+ *size = get_unaligned_be16(&cdb[3]);
break;
case WRITE_BUFFER:
- *size = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8];
+ *size = get_unaligned_be24(&cdb[6]);
break;
case REPORT_LUNS:
cmd->execute_cmd = spc_emulate_report_luns;
- *size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9];
+ *size = get_unaligned_be32(&cdb[6]);
/*
* Do implicit HEAD_OF_QUEUE processing for REPORT_LUNS
* See spc4r17 section 5.3
diff --git a/drivers/target/target_core_tmr.c b/drivers/target/target_core_tmr.c
index 13f47bf4d16b..e22847bd79b9 100644
--- a/drivers/target/target_core_tmr.c
+++ b/drivers/target/target_core_tmr.c
@@ -355,20 +355,10 @@ static void core_tmr_drain_state_list(
cmd = list_entry(drain_task_list.next, struct se_cmd, state_list);
list_del_init(&cmd->state_list);
- pr_debug("LUN_RESET: %s cmd: %p"
- " ITT/CmdSN: 0x%08llx/0x%08x, i_state: %d, t_state: %d"
- "cdb: 0x%02x\n",
- (preempt_and_abort_list) ? "Preempt" : "", cmd,
- cmd->tag, 0,
- cmd->se_tfo->get_cmd_state(cmd), cmd->t_state,
- cmd->t_task_cdb[0]);
- pr_debug("LUN_RESET: ITT[0x%08llx] - pr_res_key: 0x%016Lx"
- " -- CMD_T_ACTIVE: %d"
- " CMD_T_STOP: %d CMD_T_SENT: %d\n",
- cmd->tag, cmd->pr_res_key,
- (cmd->transport_state & CMD_T_ACTIVE) != 0,
- (cmd->transport_state & CMD_T_STOP) != 0,
- (cmd->transport_state & CMD_T_SENT) != 0);
+ target_show_cmd("LUN_RESET: ", cmd);
+ pr_debug("LUN_RESET: ITT[0x%08llx] - %s pr_res_key: 0x%016Lx\n",
+ cmd->tag, (preempt_and_abort_list) ? "preempt" : "",
+ cmd->pr_res_key);
/*
* If the command may be queued onto a workqueue cancel it now.
diff --git a/drivers/target/target_core_tpg.c b/drivers/target/target_core_tpg.c
index 310d9e55c6eb..36913734c6bc 100644
--- a/drivers/target/target_core_tpg.c
+++ b/drivers/target/target_core_tpg.c
@@ -576,7 +576,6 @@ struct se_lun *core_tpg_alloc_lun(
return ERR_PTR(-ENOMEM);
}
lun->unpacked_lun = unpacked_lun;
- lun->lun_link_magic = SE_LUN_LINK_MAGIC;
atomic_set(&lun->lun_acl_count, 0);
init_completion(&lun->lun_ref_comp);
init_completion(&lun->lun_shutdown_comp);
diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c
index 1bdc10651bcd..97fed9a298bd 100644
--- a/drivers/target/target_core_transport.c
+++ b/drivers/target/target_core_transport.c
@@ -704,23 +704,43 @@ static unsigned char *transport_get_sense_buffer(struct se_cmd *cmd)
return cmd->sense_buffer;
}
+void transport_copy_sense_to_cmd(struct se_cmd *cmd, unsigned char *sense)
+{
+ unsigned char *cmd_sense_buf;
+ unsigned long flags;
+
+ spin_lock_irqsave(&cmd->t_state_lock, flags);
+ cmd_sense_buf = transport_get_sense_buffer(cmd);
+ if (!cmd_sense_buf) {
+ spin_unlock_irqrestore(&cmd->t_state_lock, flags);
+ return;
+ }
+
+ cmd->se_cmd_flags |= SCF_TRANSPORT_TASK_SENSE;
+ memcpy(cmd_sense_buf, sense, cmd->scsi_sense_length);
+ spin_unlock_irqrestore(&cmd->t_state_lock, flags);
+}
+EXPORT_SYMBOL(transport_copy_sense_to_cmd);
+
void target_complete_cmd(struct se_cmd *cmd, u8 scsi_status)
{
struct se_device *dev = cmd->se_dev;
- int success = scsi_status == GOOD;
+ int success;
unsigned long flags;
cmd->scsi_status = scsi_status;
-
spin_lock_irqsave(&cmd->t_state_lock, flags);
-
- if (dev && dev->transport->transport_complete) {
- dev->transport->transport_complete(cmd,
- cmd->t_data_sg,
- transport_get_sense_buffer(cmd));
+ switch (cmd->scsi_status) {
+ case SAM_STAT_CHECK_CONDITION:
if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE)
success = 1;
+ else
+ success = 0;
+ break;
+ default:
+ success = 1;
+ break;
}
/*
@@ -730,6 +750,15 @@ void target_complete_cmd(struct se_cmd *cmd, u8 scsi_status)
if (cmd->transport_state & CMD_T_ABORTED ||
cmd->transport_state & CMD_T_STOP) {
spin_unlock_irqrestore(&cmd->t_state_lock, flags);
+ /*
+ * If COMPARE_AND_WRITE was stopped by __transport_wait_for_tasks(),
+ * release se_device->caw_sem obtained by sbc_compare_and_write()
+ * since target_complete_ok_work() or target_complete_failure_work()
+ * won't be called to invoke the normal CAW completion callbacks.
+ */
+ if (cmd->se_cmd_flags & SCF_COMPARE_AND_WRITE) {
+ up(&dev->caw_sem);
+ }
complete_all(&cmd->t_transport_stop_comp);
return;
} else if (!success) {
@@ -1239,6 +1268,7 @@ void transport_init_se_cmd(
init_completion(&cmd->t_transport_stop_comp);
init_completion(&cmd->cmd_wait_comp);
spin_lock_init(&cmd->t_state_lock);
+ INIT_WORK(&cmd->work, NULL);
kref_init(&cmd->cmd_kref);
cmd->se_tfo = tfo;
@@ -1590,9 +1620,33 @@ static void target_complete_tmr_failure(struct work_struct *work)
se_cmd->se_tmr_req->response = TMR_LUN_DOES_NOT_EXIST;
se_cmd->se_tfo->queue_tm_rsp(se_cmd);
+ transport_lun_remove_cmd(se_cmd);
transport_cmd_check_stop_to_fabric(se_cmd);
}
+static bool target_lookup_lun_from_tag(struct se_session *se_sess, u64 tag,
+ u64 *unpacked_lun)
+{
+ struct se_cmd *se_cmd;
+ unsigned long flags;
+ bool ret = false;
+
+ spin_lock_irqsave(&se_sess->sess_cmd_lock, flags);
+ list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list) {
+ if (se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)
+ continue;
+
+ if (se_cmd->tag == tag) {
+ *unpacked_lun = se_cmd->orig_fe_lun;
+ ret = true;
+ break;
+ }
+ }
+ spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags);
+
+ return ret;
+}
+
/**
* target_submit_tmr - lookup unpacked lun and submit uninitialized se_cmd
* for TMR CDBs
@@ -1640,19 +1694,31 @@ int target_submit_tmr(struct se_cmd *se_cmd, struct se_session *se_sess,
core_tmr_release_req(se_cmd->se_tmr_req);
return ret;
}
+ /*
+ * If this is ABORT_TASK with no explicit fabric provided LUN,
+ * go ahead and search active session tags for a match to figure
+ * out unpacked_lun for the original se_cmd.
+ */
+ if (tm_type == TMR_ABORT_TASK && (flags & TARGET_SCF_LOOKUP_LUN_FROM_TAG)) {
+ if (!target_lookup_lun_from_tag(se_sess, tag, &unpacked_lun))
+ goto failure;
+ }
ret = transport_lookup_tmr_lun(se_cmd, unpacked_lun);
- if (ret) {
- /*
- * For callback during failure handling, push this work off
- * to process context with TMR_LUN_DOES_NOT_EXIST status.
- */
- INIT_WORK(&se_cmd->work, target_complete_tmr_failure);
- schedule_work(&se_cmd->work);
- return 0;
- }
+ if (ret)
+ goto failure;
+
transport_generic_handle_tmr(se_cmd);
return 0;
+
+ /*
+ * For callback during failure handling, push this work off
+ * to process context with TMR_LUN_DOES_NOT_EXIST status.
+ */
+failure:
+ INIT_WORK(&se_cmd->work, target_complete_tmr_failure);
+ schedule_work(&se_cmd->work);
+ return 0;
}
EXPORT_SYMBOL(target_submit_tmr);
@@ -1667,15 +1733,9 @@ void transport_generic_request_failure(struct se_cmd *cmd,
if (transport_check_aborted_status(cmd, 1))
return;
- pr_debug("-----[ Storage Engine Exception for cmd: %p ITT: 0x%08llx"
- " CDB: 0x%02x\n", cmd, cmd->tag, cmd->t_task_cdb[0]);
- pr_debug("-----[ i_state: %d t_state: %d sense_reason: %d\n",
- cmd->se_tfo->get_cmd_state(cmd),
- cmd->t_state, sense_reason);
- pr_debug("-----[ CMD_T_ACTIVE: %d CMD_T_STOP: %d CMD_T_SENT: %d\n",
- (cmd->transport_state & CMD_T_ACTIVE) != 0,
- (cmd->transport_state & CMD_T_STOP) != 0,
- (cmd->transport_state & CMD_T_SENT) != 0);
+ pr_debug("-----[ Storage Engine Exception; sense_reason %d\n",
+ sense_reason);
+ target_show_cmd("-----[ ", cmd);
/*
* For SAM Task Attribute emulation for failed struct se_cmd
@@ -2668,6 +2728,108 @@ int target_put_sess_cmd(struct se_cmd *se_cmd)
}
EXPORT_SYMBOL(target_put_sess_cmd);
+static const char *data_dir_name(enum dma_data_direction d)
+{
+ switch (d) {
+ case DMA_BIDIRECTIONAL: return "BIDI";
+ case DMA_TO_DEVICE: return "WRITE";
+ case DMA_FROM_DEVICE: return "READ";
+ case DMA_NONE: return "NONE";
+ }
+
+ return "(?)";
+}
+
+static const char *cmd_state_name(enum transport_state_table t)
+{
+ switch (t) {
+ case TRANSPORT_NO_STATE: return "NO_STATE";
+ case TRANSPORT_NEW_CMD: return "NEW_CMD";
+ case TRANSPORT_WRITE_PENDING: return "WRITE_PENDING";
+ case TRANSPORT_PROCESSING: return "PROCESSING";
+ case TRANSPORT_COMPLETE: return "COMPLETE";
+ case TRANSPORT_ISTATE_PROCESSING:
+ return "ISTATE_PROCESSING";
+ case TRANSPORT_COMPLETE_QF_WP: return "COMPLETE_QF_WP";
+ case TRANSPORT_COMPLETE_QF_OK: return "COMPLETE_QF_OK";
+ case TRANSPORT_COMPLETE_QF_ERR: return "COMPLETE_QF_ERR";
+ }
+
+ return "(?)";
+}
+
+static void target_append_str(char **str, const char *txt)
+{
+ char *prev = *str;
+
+ *str = *str ? kasprintf(GFP_ATOMIC, "%s,%s", *str, txt) :
+ kstrdup(txt, GFP_ATOMIC);
+ kfree(prev);
+}
+
+/*
+ * Convert a transport state bitmask into a string. The caller is
+ * responsible for freeing the returned pointer.
+ */
+static char *target_ts_to_str(u32 ts)
+{
+ char *str = NULL;
+
+ if (ts & CMD_T_ABORTED)
+ target_append_str(&str, "aborted");
+ if (ts & CMD_T_ACTIVE)
+ target_append_str(&str, "active");
+ if (ts & CMD_T_COMPLETE)
+ target_append_str(&str, "complete");
+ if (ts & CMD_T_SENT)
+ target_append_str(&str, "sent");
+ if (ts & CMD_T_STOP)
+ target_append_str(&str, "stop");
+ if (ts & CMD_T_FABRIC_STOP)
+ target_append_str(&str, "fabric_stop");
+
+ return str;
+}
+
+static const char *target_tmf_name(enum tcm_tmreq_table tmf)
+{
+ switch (tmf) {
+ case TMR_ABORT_TASK: return "ABORT_TASK";
+ case TMR_ABORT_TASK_SET: return "ABORT_TASK_SET";
+ case TMR_CLEAR_ACA: return "CLEAR_ACA";
+ case TMR_CLEAR_TASK_SET: return "CLEAR_TASK_SET";
+ case TMR_LUN_RESET: return "LUN_RESET";
+ case TMR_TARGET_WARM_RESET: return "TARGET_WARM_RESET";
+ case TMR_TARGET_COLD_RESET: return "TARGET_COLD_RESET";
+ case TMR_UNKNOWN: break;
+ }
+ return "(?)";
+}
+
+void target_show_cmd(const char *pfx, struct se_cmd *cmd)
+{
+ char *ts_str = target_ts_to_str(cmd->transport_state);
+ const u8 *cdb = cmd->t_task_cdb;
+ struct se_tmr_req *tmf = cmd->se_tmr_req;
+
+ if (!(cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) {
+ pr_debug("%scmd %#02x:%#02x with tag %#llx dir %s i_state %d t_state %s len %d refcnt %d transport_state %s\n",
+ pfx, cdb[0], cdb[1], cmd->tag,
+ data_dir_name(cmd->data_direction),
+ cmd->se_tfo->get_cmd_state(cmd),
+ cmd_state_name(cmd->t_state), cmd->data_length,
+ kref_read(&cmd->cmd_kref), ts_str);
+ } else {
+ pr_debug("%stmf %s with tag %#llx ref_task_tag %#llx i_state %d t_state %s refcnt %d transport_state %s\n",
+ pfx, target_tmf_name(tmf->function), cmd->tag,
+ tmf->ref_task_tag, cmd->se_tfo->get_cmd_state(cmd),
+ cmd_state_name(cmd->t_state),
+ kref_read(&cmd->cmd_kref), ts_str);
+ }
+ kfree(ts_str);
+}
+EXPORT_SYMBOL(target_show_cmd);
+
/* target_sess_cmd_list_set_waiting - Flag all commands in
* sess_cmd_list to complete cmd_wait_comp. Set
* sess_tearing_down so no more commands are queued.
@@ -2812,13 +2974,13 @@ __transport_wait_for_tasks(struct se_cmd *cmd, bool fabric_stop,
cmd->transport_state |= CMD_T_STOP;
- pr_debug("wait_for_tasks: Stopping %p ITT: 0x%08llx i_state: %d,"
- " t_state: %d, CMD_T_STOP\n", cmd, cmd->tag,
- cmd->se_tfo->get_cmd_state(cmd), cmd->t_state);
+ target_show_cmd("wait_for_tasks: Stopping ", cmd);
spin_unlock_irqrestore(&cmd->t_state_lock, *flags);
- wait_for_completion(&cmd->t_transport_stop_comp);
+ while (!wait_for_completion_timeout(&cmd->t_transport_stop_comp,
+ 180 * HZ))
+ target_show_cmd("wait for tasks: ", cmd);
spin_lock_irqsave(&cmd->t_state_lock, *flags);
cmd->transport_state &= ~(CMD_T_ACTIVE | CMD_T_STOP);
@@ -3201,6 +3363,7 @@ static void target_tmr_work(struct work_struct *work)
cmd->se_tfo->queue_tm_rsp(cmd);
check_stop:
+ transport_lun_remove_cmd(cmd);
transport_cmd_check_stop_to_fabric(cmd);
}
@@ -3223,6 +3386,7 @@ int transport_generic_handle_tmr(
pr_warn_ratelimited("handle_tmr caught CMD_T_ABORTED TMR %d"
"ref_tag: %llu tag: %llu\n", cmd->se_tmr_req->function,
cmd->se_tmr_req->ref_task_tag, cmd->tag);
+ transport_lun_remove_cmd(cmd);
transport_cmd_check_stop_to_fabric(cmd);
return 0;
}
diff --git a/drivers/target/target_core_user.c b/drivers/target/target_core_user.c
index beb5f098f32d..80ee130f8253 100644
--- a/drivers/target/target_core_user.c
+++ b/drivers/target/target_core_user.c
@@ -87,6 +87,8 @@
/* Default maximum of the global data blocks(512K * PAGE_SIZE) */
#define TCMU_GLOBAL_MAX_BLOCKS (512 * 1024)
+static u8 tcmu_kern_cmd_reply_supported;
+
static struct device *tcmu_root_device;
struct tcmu_hba {
@@ -95,6 +97,13 @@ struct tcmu_hba {
#define TCMU_CONFIG_LEN 256
+struct tcmu_nl_cmd {
+ /* wake up thread waiting for reply */
+ struct completion complete;
+ int cmd;
+ int status;
+};
+
struct tcmu_dev {
struct list_head node;
struct kref kref;
@@ -135,6 +144,11 @@ struct tcmu_dev {
struct timer_list timeout;
unsigned int cmd_time_out;
+ spinlock_t nl_cmd_lock;
+ struct tcmu_nl_cmd curr_nl_cmd;
+ /* wake up threads waiting on curr_nl_cmd */
+ wait_queue_head_t nl_cmd_wq;
+
char dev_config[TCMU_CONFIG_LEN];
};
@@ -178,16 +192,128 @@ static const struct genl_multicast_group tcmu_mcgrps[] = {
[TCMU_MCGRP_CONFIG] = { .name = "config", },
};
+static struct nla_policy tcmu_attr_policy[TCMU_ATTR_MAX+1] = {
+ [TCMU_ATTR_DEVICE] = { .type = NLA_STRING },
+ [TCMU_ATTR_MINOR] = { .type = NLA_U32 },
+ [TCMU_ATTR_CMD_STATUS] = { .type = NLA_S32 },
+ [TCMU_ATTR_DEVICE_ID] = { .type = NLA_U32 },
+ [TCMU_ATTR_SUPP_KERN_CMD_REPLY] = { .type = NLA_U8 },
+};
+
+static int tcmu_genl_cmd_done(struct genl_info *info, int completed_cmd)
+{
+ struct se_device *dev;
+ struct tcmu_dev *udev;
+ struct tcmu_nl_cmd *nl_cmd;
+ int dev_id, rc, ret = 0;
+ bool is_removed = (completed_cmd == TCMU_CMD_REMOVED_DEVICE);
+
+ if (!info->attrs[TCMU_ATTR_CMD_STATUS] ||
+ !info->attrs[TCMU_ATTR_DEVICE_ID]) {
+ printk(KERN_ERR "TCMU_ATTR_CMD_STATUS or TCMU_ATTR_DEVICE_ID not set, doing nothing\n");
+ return -EINVAL;
+ }
+
+ dev_id = nla_get_u32(info->attrs[TCMU_ATTR_DEVICE_ID]);
+ rc = nla_get_s32(info->attrs[TCMU_ATTR_CMD_STATUS]);
+
+ dev = target_find_device(dev_id, !is_removed);
+ if (!dev) {
+ printk(KERN_ERR "tcmu nl cmd %u/%u completion could not find device with dev id %u.\n",
+ completed_cmd, rc, dev_id);
+ return -ENODEV;
+ }
+ udev = TCMU_DEV(dev);
+
+ spin_lock(&udev->nl_cmd_lock);
+ nl_cmd = &udev->curr_nl_cmd;
+
+ pr_debug("genl cmd done got id %d curr %d done %d rc %d\n", dev_id,
+ nl_cmd->cmd, completed_cmd, rc);
+
+ if (nl_cmd->cmd != completed_cmd) {
+ printk(KERN_ERR "Mismatched commands (Expecting reply for %d. Current %d).\n",
+ completed_cmd, nl_cmd->cmd);
+ ret = -EINVAL;
+ } else {
+ nl_cmd->status = rc;
+ }
+
+ spin_unlock(&udev->nl_cmd_lock);
+ if (!is_removed)
+ target_undepend_item(&dev->dev_group.cg_item);
+ if (!ret)
+ complete(&nl_cmd->complete);
+ return ret;
+}
+
+static int tcmu_genl_rm_dev_done(struct sk_buff *skb, struct genl_info *info)
+{
+ return tcmu_genl_cmd_done(info, TCMU_CMD_REMOVED_DEVICE);
+}
+
+static int tcmu_genl_add_dev_done(struct sk_buff *skb, struct genl_info *info)
+{
+ return tcmu_genl_cmd_done(info, TCMU_CMD_ADDED_DEVICE);
+}
+
+static int tcmu_genl_reconfig_dev_done(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ return tcmu_genl_cmd_done(info, TCMU_CMD_RECONFIG_DEVICE);
+}
+
+static int tcmu_genl_set_features(struct sk_buff *skb, struct genl_info *info)
+{
+ if (info->attrs[TCMU_ATTR_SUPP_KERN_CMD_REPLY]) {
+ tcmu_kern_cmd_reply_supported =
+ nla_get_u8(info->attrs[TCMU_ATTR_SUPP_KERN_CMD_REPLY]);
+ printk(KERN_INFO "tcmu daemon: command reply support %u.\n",
+ tcmu_kern_cmd_reply_supported);
+ }
+
+ return 0;
+}
+
+static const struct genl_ops tcmu_genl_ops[] = {
+ {
+ .cmd = TCMU_CMD_SET_FEATURES,
+ .flags = GENL_ADMIN_PERM,
+ .policy = tcmu_attr_policy,
+ .doit = tcmu_genl_set_features,
+ },
+ {
+ .cmd = TCMU_CMD_ADDED_DEVICE_DONE,
+ .flags = GENL_ADMIN_PERM,
+ .policy = tcmu_attr_policy,
+ .doit = tcmu_genl_add_dev_done,
+ },
+ {
+ .cmd = TCMU_CMD_REMOVED_DEVICE_DONE,
+ .flags = GENL_ADMIN_PERM,
+ .policy = tcmu_attr_policy,
+ .doit = tcmu_genl_rm_dev_done,
+ },
+ {
+ .cmd = TCMU_CMD_RECONFIG_DEVICE_DONE,
+ .flags = GENL_ADMIN_PERM,
+ .policy = tcmu_attr_policy,
+ .doit = tcmu_genl_reconfig_dev_done,
+ },
+};
+
/* Our generic netlink family */
static struct genl_family tcmu_genl_family __ro_after_init = {
.module = THIS_MODULE,
.hdrsize = 0,
.name = "TCM-USER",
- .version = 1,
+ .version = 2,
.maxattr = TCMU_ATTR_MAX,
.mcgrps = tcmu_mcgrps,
.n_mcgrps = ARRAY_SIZE(tcmu_mcgrps),
.netnsok = true,
+ .ops = tcmu_genl_ops,
+ .n_ops = ARRAY_SIZE(tcmu_genl_ops),
};
#define tcmu_cmd_set_dbi_cur(cmd, index) ((cmd)->dbi_cur = (index))
@@ -216,7 +342,6 @@ static inline bool tcmu_get_empty_block(struct tcmu_dev *udev,
page = radix_tree_lookup(&udev->data_blocks, dbi);
if (!page) {
-
if (atomic_add_return(1, &global_db_count) >
TCMU_GLOBAL_MAX_BLOCKS) {
atomic_dec(&global_db_count);
@@ -226,14 +351,11 @@ static inline bool tcmu_get_empty_block(struct tcmu_dev *udev,
/* try to get new page from the mm */
page = alloc_page(GFP_KERNEL);
if (!page)
- return false;
+ goto err_alloc;
ret = radix_tree_insert(&udev->data_blocks, dbi, page);
- if (ret) {
- __free_page(page);
- return false;
- }
-
+ if (ret)
+ goto err_insert;
}
if (dbi > udev->dbi_max)
@@ -243,6 +365,11 @@ static inline bool tcmu_get_empty_block(struct tcmu_dev *udev,
tcmu_cmd_set_dbi(tcmu_cmd, dbi);
return true;
+err_insert:
+ __free_page(page);
+err_alloc:
+ atomic_dec(&global_db_count);
+ return false;
}
static bool tcmu_get_empty_blocks(struct tcmu_dev *udev,
@@ -401,7 +528,7 @@ static inline size_t get_block_offset_user(struct tcmu_dev *dev,
DATA_BLOCK_SIZE - remaining;
}
-static inline size_t iov_tail(struct tcmu_dev *udev, struct iovec *iov)
+static inline size_t iov_tail(struct iovec *iov)
{
return (size_t)iov->iov_base + iov->iov_len;
}
@@ -437,10 +564,10 @@ static int scatter_data_area(struct tcmu_dev *udev,
to_offset = get_block_offset_user(udev, dbi,
block_remaining);
offset = DATA_BLOCK_SIZE - block_remaining;
- to = (void *)(unsigned long)to + offset;
+ to += offset;
if (*iov_cnt != 0 &&
- to_offset == iov_tail(udev, *iov)) {
+ to_offset == iov_tail(*iov)) {
(*iov)->iov_len += copy_bytes;
} else {
new_iov(iov, iov_cnt, udev);
@@ -510,7 +637,7 @@ static void gather_data_area(struct tcmu_dev *udev, struct tcmu_cmd *cmd,
copy_bytes = min_t(size_t, sg_remaining,
block_remaining);
offset = DATA_BLOCK_SIZE - block_remaining;
- from = (void *)(unsigned long)from + offset;
+ from += offset;
tcmu_flush_dcache_range(from, copy_bytes);
memcpy(to + sg->length - sg_remaining, from,
copy_bytes);
@@ -596,10 +723,7 @@ static bool is_ring_space_avail(struct tcmu_dev *udev, struct tcmu_cmd *cmd,
}
}
- if (!tcmu_get_empty_blocks(udev, cmd))
- return false;
-
- return true;
+ return tcmu_get_empty_blocks(udev, cmd);
}
static inline size_t tcmu_cmd_get_base_cmd_size(size_t iov_cnt)
@@ -699,25 +823,24 @@ tcmu_queue_cmd_ring(struct tcmu_cmd *tcmu_cmd)
size_t pad_size = head_to_end(cmd_head, udev->cmdr_size);
entry = (void *) mb + CMDR_OFF + cmd_head;
- tcmu_flush_dcache_range(entry, sizeof(*entry));
tcmu_hdr_set_op(&entry->hdr.len_op, TCMU_OP_PAD);
tcmu_hdr_set_len(&entry->hdr.len_op, pad_size);
entry->hdr.cmd_id = 0; /* not used for PAD */
entry->hdr.kflags = 0;
entry->hdr.uflags = 0;
+ tcmu_flush_dcache_range(entry, sizeof(*entry));
UPDATE_HEAD(mb->cmd_head, pad_size, udev->cmdr_size);
+ tcmu_flush_dcache_range(mb, sizeof(*mb));
cmd_head = mb->cmd_head % udev->cmdr_size; /* UAM */
WARN_ON(cmd_head != 0);
}
entry = (void *) mb + CMDR_OFF + cmd_head;
- tcmu_flush_dcache_range(entry, sizeof(*entry));
+ memset(entry, 0, command_size);
tcmu_hdr_set_op(&entry->hdr.len_op, TCMU_OP_CMD);
entry->hdr.cmd_id = tcmu_cmd->cmd_id;
- entry->hdr.kflags = 0;
- entry->hdr.uflags = 0;
/* Handle allocating space from the data area */
tcmu_cmd_reset_dbi_cur(tcmu_cmd);
@@ -736,11 +859,10 @@ tcmu_queue_cmd_ring(struct tcmu_cmd *tcmu_cmd)
return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
}
entry->req.iov_cnt = iov_cnt;
- entry->req.iov_dif_cnt = 0;
/* Handle BIDI commands */
+ iov_cnt = 0;
if (se_cmd->se_cmd_flags & SCF_BIDI) {
- iov_cnt = 0;
iov++;
ret = scatter_data_area(udev, tcmu_cmd,
se_cmd->t_bidi_data_sg,
@@ -753,8 +875,8 @@ tcmu_queue_cmd_ring(struct tcmu_cmd *tcmu_cmd)
pr_err("tcmu: alloc and scatter bidi data failed\n");
return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
}
- entry->req.iov_bidi_cnt = iov_cnt;
}
+ entry->req.iov_bidi_cnt = iov_cnt;
/*
* Recalaulate the command's base size and size according
@@ -830,8 +952,7 @@ static void tcmu_handle_completion(struct tcmu_cmd *cmd, struct tcmu_cmd_entry *
cmd->se_cmd);
entry->rsp.scsi_status = SAM_STAT_CHECK_CONDITION;
} else if (entry->rsp.scsi_status == SAM_STAT_CHECK_CONDITION) {
- memcpy(se_cmd->sense_buffer, entry->rsp.sense_buffer,
- se_cmd->scsi_sense_length);
+ transport_copy_sense_to_cmd(se_cmd, entry->rsp.sense_buffer);
} else if (se_cmd->se_cmd_flags & SCF_BIDI) {
/* Get Data-In buffer before clean up */
gather_data_area(udev, cmd, true);
@@ -989,6 +1110,9 @@ static struct se_device *tcmu_alloc_device(struct se_hba *hba, const char *name)
setup_timer(&udev->timeout, tcmu_device_timedout,
(unsigned long)udev);
+ init_waitqueue_head(&udev->nl_cmd_wq);
+ spin_lock_init(&udev->nl_cmd_lock);
+
return &udev->se_dev;
}
@@ -1140,6 +1264,7 @@ static int tcmu_open(struct uio_info *info, struct inode *inode)
return -EBUSY;
udev->inode = inode;
+ kref_get(&udev->kref);
pr_debug("open\n");
@@ -1171,12 +1296,59 @@ static int tcmu_release(struct uio_info *info, struct inode *inode)
clear_bit(TCMU_DEV_BIT_OPEN, &udev->flags);
pr_debug("close\n");
- /* release ref from configure */
+ /* release ref from open */
kref_put(&udev->kref, tcmu_dev_kref_release);
return 0;
}
-static int tcmu_netlink_event(enum tcmu_genl_cmd cmd, const char *name, int minor)
+static void tcmu_init_genl_cmd_reply(struct tcmu_dev *udev, int cmd)
+{
+ struct tcmu_nl_cmd *nl_cmd = &udev->curr_nl_cmd;
+
+ if (!tcmu_kern_cmd_reply_supported)
+ return;
+relock:
+ spin_lock(&udev->nl_cmd_lock);
+
+ if (nl_cmd->cmd != TCMU_CMD_UNSPEC) {
+ spin_unlock(&udev->nl_cmd_lock);
+ pr_debug("sleeping for open nl cmd\n");
+ wait_event(udev->nl_cmd_wq, (nl_cmd->cmd == TCMU_CMD_UNSPEC));
+ goto relock;
+ }
+
+ memset(nl_cmd, 0, sizeof(*nl_cmd));
+ nl_cmd->cmd = cmd;
+ init_completion(&nl_cmd->complete);
+
+ spin_unlock(&udev->nl_cmd_lock);
+}
+
+static int tcmu_wait_genl_cmd_reply(struct tcmu_dev *udev)
+{
+ struct tcmu_nl_cmd *nl_cmd = &udev->curr_nl_cmd;
+ int ret;
+ DEFINE_WAIT(__wait);
+
+ if (!tcmu_kern_cmd_reply_supported)
+ return 0;
+
+ pr_debug("sleeping for nl reply\n");
+ wait_for_completion(&nl_cmd->complete);
+
+ spin_lock(&udev->nl_cmd_lock);
+ nl_cmd->cmd = TCMU_CMD_UNSPEC;
+ ret = nl_cmd->status;
+ nl_cmd->status = 0;
+ spin_unlock(&udev->nl_cmd_lock);
+
+ wake_up_all(&udev->nl_cmd_wq);
+
+ return ret;;
+}
+
+static int tcmu_netlink_event(struct tcmu_dev *udev, enum tcmu_genl_cmd cmd,
+ int reconfig_attr, const void *reconfig_data)
{
struct sk_buff *skb;
void *msg_header;
@@ -1190,22 +1362,51 @@ static int tcmu_netlink_event(enum tcmu_genl_cmd cmd, const char *name, int mino
if (!msg_header)
goto free_skb;
- ret = nla_put_string(skb, TCMU_ATTR_DEVICE, name);
+ ret = nla_put_string(skb, TCMU_ATTR_DEVICE, udev->uio_info.name);
+ if (ret < 0)
+ goto free_skb;
+
+ ret = nla_put_u32(skb, TCMU_ATTR_MINOR, udev->uio_info.uio_dev->minor);
if (ret < 0)
goto free_skb;
- ret = nla_put_u32(skb, TCMU_ATTR_MINOR, minor);
+ ret = nla_put_u32(skb, TCMU_ATTR_DEVICE_ID, udev->se_dev.dev_index);
if (ret < 0)
goto free_skb;
+ if (cmd == TCMU_CMD_RECONFIG_DEVICE) {
+ switch (reconfig_attr) {
+ case TCMU_ATTR_DEV_CFG:
+ ret = nla_put_string(skb, reconfig_attr, reconfig_data);
+ break;
+ case TCMU_ATTR_DEV_SIZE:
+ ret = nla_put_u64_64bit(skb, reconfig_attr,
+ *((u64 *)reconfig_data),
+ TCMU_ATTR_PAD);
+ break;
+ case TCMU_ATTR_WRITECACHE:
+ ret = nla_put_u8(skb, reconfig_attr,
+ *((u8 *)reconfig_data));
+ break;
+ default:
+ BUG();
+ }
+
+ if (ret < 0)
+ goto free_skb;
+ }
+
genlmsg_end(skb, msg_header);
+ tcmu_init_genl_cmd_reply(udev, cmd);
+
ret = genlmsg_multicast_allns(&tcmu_genl_family, skb, 0,
TCMU_MCGRP_CONFIG, GFP_KERNEL);
-
/* We don't care if no one is listening */
if (ret == -ESRCH)
ret = 0;
+ if (!ret)
+ ret = tcmu_wait_genl_cmd_reply(udev);
return ret;
free_skb:
@@ -1213,19 +1414,14 @@ free_skb:
return ret;
}
-static int tcmu_configure_device(struct se_device *dev)
+static int tcmu_update_uio_info(struct tcmu_dev *udev)
{
- struct tcmu_dev *udev = TCMU_DEV(dev);
struct tcmu_hba *hba = udev->hba->hba_ptr;
struct uio_info *info;
- struct tcmu_mailbox *mb;
- size_t size;
- size_t used;
- int ret = 0;
+ size_t size, used;
char *str;
info = &udev->uio_info;
-
size = snprintf(NULL, 0, "tcm-user/%u/%s/%s", hba->host_id, udev->name,
udev->dev_config);
size += 1; /* for \0 */
@@ -1234,12 +1430,27 @@ static int tcmu_configure_device(struct se_device *dev)
return -ENOMEM;
used = snprintf(str, size, "tcm-user/%u/%s", hba->host_id, udev->name);
-
if (udev->dev_config[0])
snprintf(str + used, size - used, "/%s", udev->dev_config);
info->name = str;
+ return 0;
+}
+
+static int tcmu_configure_device(struct se_device *dev)
+{
+ struct tcmu_dev *udev = TCMU_DEV(dev);
+ struct uio_info *info;
+ struct tcmu_mailbox *mb;
+ int ret = 0;
+
+ ret = tcmu_update_uio_info(udev);
+ if (ret)
+ return ret;
+
+ info = &udev->uio_info;
+
udev->mb_addr = vzalloc(CMDR_SIZE);
if (!udev->mb_addr) {
ret = -ENOMEM;
@@ -1290,6 +1501,8 @@ static int tcmu_configure_device(struct se_device *dev)
/* Other attributes can be configured in userspace */
if (!dev->dev_attrib.hw_max_sectors)
dev->dev_attrib.hw_max_sectors = 128;
+ if (!dev->dev_attrib.emulate_write_cache)
+ dev->dev_attrib.emulate_write_cache = 0;
dev->dev_attrib.hw_queue_depth = 128;
/*
@@ -1298,8 +1511,7 @@ static int tcmu_configure_device(struct se_device *dev)
*/
kref_get(&udev->kref);
- ret = tcmu_netlink_event(TCMU_CMD_ADDED_DEVICE, udev->uio_info.name,
- udev->uio_info.uio_dev->minor);
+ ret = tcmu_netlink_event(udev, TCMU_CMD_ADDED_DEVICE, 0, NULL);
if (ret)
goto err_netlink;
@@ -1355,6 +1567,14 @@ static void tcmu_blocks_release(struct tcmu_dev *udev)
static void tcmu_free_device(struct se_device *dev)
{
struct tcmu_dev *udev = TCMU_DEV(dev);
+
+ /* release ref from init */
+ kref_put(&udev->kref, tcmu_dev_kref_release);
+}
+
+static void tcmu_destroy_device(struct se_device *dev)
+{
+ struct tcmu_dev *udev = TCMU_DEV(dev);
struct tcmu_cmd *cmd;
bool all_expired = true;
int i;
@@ -1379,14 +1599,11 @@ static void tcmu_free_device(struct se_device *dev)
tcmu_blocks_release(udev);
- if (tcmu_dev_configured(udev)) {
- tcmu_netlink_event(TCMU_CMD_REMOVED_DEVICE, udev->uio_info.name,
- udev->uio_info.uio_dev->minor);
+ tcmu_netlink_event(udev, TCMU_CMD_REMOVED_DEVICE, 0, NULL);
- uio_unregister_device(&udev->uio_info);
- }
+ uio_unregister_device(&udev->uio_info);
- /* release ref from init */
+ /* release ref from configure */
kref_put(&udev->kref, tcmu_dev_kref_release);
}
@@ -1546,6 +1763,129 @@ static ssize_t tcmu_cmd_time_out_store(struct config_item *item, const char *pag
}
CONFIGFS_ATTR(tcmu_, cmd_time_out);
+static ssize_t tcmu_dev_config_show(struct config_item *item, char *page)
+{
+ struct se_dev_attrib *da = container_of(to_config_group(item),
+ struct se_dev_attrib, da_group);
+ struct tcmu_dev *udev = TCMU_DEV(da->da_dev);
+
+ return snprintf(page, PAGE_SIZE, "%s\n", udev->dev_config);
+}
+
+static ssize_t tcmu_dev_config_store(struct config_item *item, const char *page,
+ size_t count)
+{
+ struct se_dev_attrib *da = container_of(to_config_group(item),
+ struct se_dev_attrib, da_group);
+ struct tcmu_dev *udev = TCMU_DEV(da->da_dev);
+ int ret, len;
+
+ len = strlen(page);
+ if (!len || len > TCMU_CONFIG_LEN - 1)
+ return -EINVAL;
+
+ /* Check if device has been configured before */
+ if (tcmu_dev_configured(udev)) {
+ ret = tcmu_netlink_event(udev, TCMU_CMD_RECONFIG_DEVICE,
+ TCMU_ATTR_DEV_CFG, page);
+ if (ret) {
+ pr_err("Unable to reconfigure device\n");
+ return ret;
+ }
+ strlcpy(udev->dev_config, page, TCMU_CONFIG_LEN);
+
+ ret = tcmu_update_uio_info(udev);
+ if (ret)
+ return ret;
+ return count;
+ }
+ strlcpy(udev->dev_config, page, TCMU_CONFIG_LEN);
+
+ return count;
+}
+CONFIGFS_ATTR(tcmu_, dev_config);
+
+static ssize_t tcmu_dev_size_show(struct config_item *item, char *page)
+{
+ struct se_dev_attrib *da = container_of(to_config_group(item),
+ struct se_dev_attrib, da_group);
+ struct tcmu_dev *udev = TCMU_DEV(da->da_dev);
+
+ return snprintf(page, PAGE_SIZE, "%zu\n", udev->dev_size);
+}
+
+static ssize_t tcmu_dev_size_store(struct config_item *item, const char *page,
+ size_t count)
+{
+ struct se_dev_attrib *da = container_of(to_config_group(item),
+ struct se_dev_attrib, da_group);
+ struct tcmu_dev *udev = TCMU_DEV(da->da_dev);
+ u64 val;
+ int ret;
+
+ ret = kstrtou64(page, 0, &val);
+ if (ret < 0)
+ return ret;
+
+ /* Check if device has been configured before */
+ if (tcmu_dev_configured(udev)) {
+ ret = tcmu_netlink_event(udev, TCMU_CMD_RECONFIG_DEVICE,
+ TCMU_ATTR_DEV_SIZE, &val);
+ if (ret) {
+ pr_err("Unable to reconfigure device\n");
+ return ret;
+ }
+ }
+ udev->dev_size = val;
+ return count;
+}
+CONFIGFS_ATTR(tcmu_, dev_size);
+
+static ssize_t tcmu_emulate_write_cache_show(struct config_item *item,
+ char *page)
+{
+ struct se_dev_attrib *da = container_of(to_config_group(item),
+ struct se_dev_attrib, da_group);
+
+ return snprintf(page, PAGE_SIZE, "%i\n", da->emulate_write_cache);
+}
+
+static ssize_t tcmu_emulate_write_cache_store(struct config_item *item,
+ const char *page, size_t count)
+{
+ struct se_dev_attrib *da = container_of(to_config_group(item),
+ struct se_dev_attrib, da_group);
+ struct tcmu_dev *udev = TCMU_DEV(da->da_dev);
+ u8 val;
+ int ret;
+
+ ret = kstrtou8(page, 0, &val);
+ if (ret < 0)
+ return ret;
+
+ /* Check if device has been configured before */
+ if (tcmu_dev_configured(udev)) {
+ ret = tcmu_netlink_event(udev, TCMU_CMD_RECONFIG_DEVICE,
+ TCMU_ATTR_WRITECACHE, &val);
+ if (ret) {
+ pr_err("Unable to reconfigure device\n");
+ return ret;
+ }
+ }
+
+ da->emulate_write_cache = val;
+ return count;
+}
+CONFIGFS_ATTR(tcmu_, emulate_write_cache);
+
+static struct configfs_attribute *tcmu_attrib_attrs[] = {
+ &tcmu_attr_cmd_time_out,
+ &tcmu_attr_dev_config,
+ &tcmu_attr_dev_size,
+ &tcmu_attr_emulate_write_cache,
+ NULL,
+};
+
static struct configfs_attribute **tcmu_attrs;
static struct target_backend_ops tcmu_ops = {
@@ -1556,6 +1896,7 @@ static struct target_backend_ops tcmu_ops = {
.detach_hba = tcmu_detach_hba,
.alloc_device = tcmu_alloc_device,
.configure_device = tcmu_configure_device,
+ .destroy_device = tcmu_destroy_device,
.free_device = tcmu_free_device,
.parse_cdb = tcmu_parse_cdb,
.set_configfs_dev_params = tcmu_set_configfs_dev_params,
@@ -1573,7 +1914,7 @@ static int unmap_thread_fn(void *data)
struct page *page;
int i;
- while (1) {
+ while (!kthread_should_stop()) {
DEFINE_WAIT(__wait);
prepare_to_wait(&unmap_wait, &__wait, TASK_INTERRUPTIBLE);
@@ -1645,7 +1986,7 @@ static int unmap_thread_fn(void *data)
static int __init tcmu_module_init(void)
{
- int ret, i, len = 0;
+ int ret, i, k, len = 0;
BUILD_BUG_ON((sizeof(struct tcmu_cmd_entry) % TCMU_OP_ALIGN_SIZE) != 0);
@@ -1670,7 +2011,10 @@ static int __init tcmu_module_init(void)
for (i = 0; passthrough_attrib_attrs[i] != NULL; i++) {
len += sizeof(struct configfs_attribute *);
}
- len += sizeof(struct configfs_attribute *) * 2;
+ for (i = 0; tcmu_attrib_attrs[i] != NULL; i++) {
+ len += sizeof(struct configfs_attribute *);
+ }
+ len += sizeof(struct configfs_attribute *);
tcmu_attrs = kzalloc(len, GFP_KERNEL);
if (!tcmu_attrs) {
@@ -1681,7 +2025,10 @@ static int __init tcmu_module_init(void)
for (i = 0; passthrough_attrib_attrs[i] != NULL; i++) {
tcmu_attrs[i] = passthrough_attrib_attrs[i];
}
- tcmu_attrs[i] = &tcmu_attr_cmd_time_out;
+ for (k = 0; tcmu_attrib_attrs[k] != NULL; k++) {
+ tcmu_attrs[i] = tcmu_attrib_attrs[k];
+ i++;
+ }
tcmu_ops.tb_dev_attrib_attrs = tcmu_attrs;
ret = transport_backend_register(&tcmu_ops);
diff --git a/drivers/target/target_core_xcopy.c b/drivers/target/target_core_xcopy.c
index cac5a20a4de0..9ee89e00cd77 100644
--- a/drivers/target/target_core_xcopy.c
+++ b/drivers/target/target_core_xcopy.c
@@ -40,6 +40,8 @@
static struct workqueue_struct *xcopy_wq = NULL;
+static sense_reason_t target_parse_xcopy_cmd(struct xcopy_op *xop);
+
static int target_xcopy_gen_naa_ieee(struct se_device *dev, unsigned char *buf)
{
int off = 0;
@@ -53,48 +55,60 @@ static int target_xcopy_gen_naa_ieee(struct se_device *dev, unsigned char *buf)
return 0;
}
-static int target_xcopy_locate_se_dev_e4(const unsigned char *dev_wwn,
- struct se_device **found_dev)
+struct xcopy_dev_search_info {
+ const unsigned char *dev_wwn;
+ struct se_device *found_dev;
+};
+
+static int target_xcopy_locate_se_dev_e4_iter(struct se_device *se_dev,
+ void *data)
{
- struct se_device *se_dev;
+ struct xcopy_dev_search_info *info = data;
unsigned char tmp_dev_wwn[XCOPY_NAA_IEEE_REGEX_LEN];
int rc;
- mutex_lock(&g_device_mutex);
- list_for_each_entry(se_dev, &g_device_list, g_dev_node) {
+ if (!se_dev->dev_attrib.emulate_3pc)
+ return 0;
- if (!se_dev->dev_attrib.emulate_3pc)
- continue;
+ memset(&tmp_dev_wwn[0], 0, XCOPY_NAA_IEEE_REGEX_LEN);
+ target_xcopy_gen_naa_ieee(se_dev, &tmp_dev_wwn[0]);
- memset(&tmp_dev_wwn[0], 0, XCOPY_NAA_IEEE_REGEX_LEN);
- target_xcopy_gen_naa_ieee(se_dev, &tmp_dev_wwn[0]);
+ rc = memcmp(&tmp_dev_wwn[0], info->dev_wwn, XCOPY_NAA_IEEE_REGEX_LEN);
+ if (rc != 0)
+ return 0;
- rc = memcmp(&tmp_dev_wwn[0], dev_wwn, XCOPY_NAA_IEEE_REGEX_LEN);
- if (rc != 0)
- continue;
+ info->found_dev = se_dev;
+ pr_debug("XCOPY 0xe4: located se_dev: %p\n", se_dev);
- *found_dev = se_dev;
- pr_debug("XCOPY 0xe4: located se_dev: %p\n", se_dev);
+ rc = target_depend_item(&se_dev->dev_group.cg_item);
+ if (rc != 0) {
+ pr_err("configfs_depend_item attempt failed: %d for se_dev: %p\n",
+ rc, se_dev);
+ return rc;
+ }
- rc = target_depend_item(&se_dev->dev_group.cg_item);
- if (rc != 0) {
- pr_err("configfs_depend_item attempt failed:"
- " %d for se_dev: %p\n", rc, se_dev);
- mutex_unlock(&g_device_mutex);
- return rc;
- }
+ pr_debug("Called configfs_depend_item for se_dev: %p se_dev->se_dev_group: %p\n",
+ se_dev, &se_dev->dev_group);
+ return 1;
+}
- pr_debug("Called configfs_depend_item for se_dev: %p"
- " se_dev->se_dev_group: %p\n", se_dev,
- &se_dev->dev_group);
+static int target_xcopy_locate_se_dev_e4(const unsigned char *dev_wwn,
+ struct se_device **found_dev)
+{
+ struct xcopy_dev_search_info info;
+ int ret;
+
+ memset(&info, 0, sizeof(info));
+ info.dev_wwn = dev_wwn;
- mutex_unlock(&g_device_mutex);
+ ret = target_for_each_device(target_xcopy_locate_se_dev_e4_iter, &info);
+ if (ret == 1) {
+ *found_dev = info.found_dev;
return 0;
+ } else {
+ pr_debug_ratelimited("Unable to locate 0xe4 descriptor for EXTENDED_COPY\n");
+ return -EINVAL;
}
- mutex_unlock(&g_device_mutex);
-
- pr_debug_ratelimited("Unable to locate 0xe4 descriptor for EXTENDED_COPY\n");
- return -EINVAL;
}
static int target_xcopy_parse_tiddesc_e4(struct se_cmd *se_cmd, struct xcopy_op *xop,
@@ -311,9 +325,7 @@ static int target_xcopy_parse_segdesc_02(struct se_cmd *se_cmd, struct xcopy_op
(unsigned long long)xop->dst_lba);
if (dc != 0) {
- xop->dbl = (desc[29] & 0xff) << 16;
- xop->dbl |= (desc[30] & 0xff) << 8;
- xop->dbl |= desc[31] & 0xff;
+ xop->dbl = get_unaligned_be24(&desc[29]);
pr_debug("XCOPY seg desc 0x02: DC=1 w/ dbl: %u\n", xop->dbl);
}
@@ -781,13 +793,24 @@ static int target_xcopy_write_destination(
static void target_xcopy_do_work(struct work_struct *work)
{
struct xcopy_op *xop = container_of(work, struct xcopy_op, xop_work);
- struct se_device *src_dev = xop->src_dev, *dst_dev = xop->dst_dev;
struct se_cmd *ec_cmd = xop->xop_se_cmd;
- sector_t src_lba = xop->src_lba, dst_lba = xop->dst_lba, end_lba;
+ struct se_device *src_dev, *dst_dev;
+ sector_t src_lba, dst_lba, end_lba;
unsigned int max_sectors;
- int rc;
- unsigned short nolb = xop->nolb, cur_nolb, max_nolb, copied_nolb = 0;
+ int rc = 0;
+ unsigned short nolb, cur_nolb, max_nolb, copied_nolb = 0;
+
+ if (target_parse_xcopy_cmd(xop) != TCM_NO_SENSE)
+ goto err_free;
+ if (WARN_ON_ONCE(!xop->src_dev) || WARN_ON_ONCE(!xop->dst_dev))
+ goto err_free;
+
+ src_dev = xop->src_dev;
+ dst_dev = xop->dst_dev;
+ src_lba = xop->src_lba;
+ dst_lba = xop->dst_lba;
+ nolb = xop->nolb;
end_lba = src_lba + nolb;
/*
* Break up XCOPY I/O into hw_max_sectors sized I/O based on the
@@ -855,6 +878,8 @@ static void target_xcopy_do_work(struct work_struct *work)
out:
xcopy_pt_undepend_remotedev(xop);
+
+err_free:
kfree(xop);
/*
* Don't override an error scsi status if it has already been set
@@ -867,48 +892,22 @@ out:
target_complete_cmd(ec_cmd, ec_cmd->scsi_status);
}
-sense_reason_t target_do_xcopy(struct se_cmd *se_cmd)
+/*
+ * Returns TCM_NO_SENSE upon success or a sense code != TCM_NO_SENSE if parsing
+ * fails.
+ */
+static sense_reason_t target_parse_xcopy_cmd(struct xcopy_op *xop)
{
- struct se_device *dev = se_cmd->se_dev;
- struct xcopy_op *xop = NULL;
+ struct se_cmd *se_cmd = xop->xop_se_cmd;
unsigned char *p = NULL, *seg_desc;
- unsigned int list_id, list_id_usage, sdll, inline_dl, sa;
+ unsigned int list_id, list_id_usage, sdll, inline_dl;
sense_reason_t ret = TCM_INVALID_PARAMETER_LIST;
int rc;
unsigned short tdll;
- if (!dev->dev_attrib.emulate_3pc) {
- pr_err("EXTENDED_COPY operation explicitly disabled\n");
- return TCM_UNSUPPORTED_SCSI_OPCODE;
- }
-
- sa = se_cmd->t_task_cdb[1] & 0x1f;
- if (sa != 0x00) {
- pr_err("EXTENDED_COPY(LID4) not supported\n");
- return TCM_UNSUPPORTED_SCSI_OPCODE;
- }
-
- if (se_cmd->data_length == 0) {
- target_complete_cmd(se_cmd, SAM_STAT_GOOD);
- return TCM_NO_SENSE;
- }
- if (se_cmd->data_length < XCOPY_HDR_LEN) {
- pr_err("XCOPY parameter truncation: length %u < hdr_len %u\n",
- se_cmd->data_length, XCOPY_HDR_LEN);
- return TCM_PARAMETER_LIST_LENGTH_ERROR;
- }
-
- xop = kzalloc(sizeof(struct xcopy_op), GFP_KERNEL);
- if (!xop) {
- pr_err("Unable to allocate xcopy_op\n");
- return TCM_OUT_OF_RESOURCES;
- }
- xop->xop_se_cmd = se_cmd;
-
p = transport_kmap_data_sg(se_cmd);
if (!p) {
pr_err("transport_kmap_data_sg() failed in target_do_xcopy\n");
- kfree(xop);
return TCM_OUT_OF_RESOURCES;
}
@@ -977,18 +976,57 @@ sense_reason_t target_do_xcopy(struct se_cmd *se_cmd)
pr_debug("XCOPY: Processed %d target descriptors, length: %u\n", rc,
rc * XCOPY_TARGET_DESC_LEN);
transport_kunmap_data_sg(se_cmd);
-
- INIT_WORK(&xop->xop_work, target_xcopy_do_work);
- queue_work(xcopy_wq, &xop->xop_work);
return TCM_NO_SENSE;
out:
if (p)
transport_kunmap_data_sg(se_cmd);
- kfree(xop);
return ret;
}
+sense_reason_t target_do_xcopy(struct se_cmd *se_cmd)
+{
+ struct se_device *dev = se_cmd->se_dev;
+ struct xcopy_op *xop;
+ unsigned int sa;
+
+ if (!dev->dev_attrib.emulate_3pc) {
+ pr_err("EXTENDED_COPY operation explicitly disabled\n");
+ return TCM_UNSUPPORTED_SCSI_OPCODE;
+ }
+
+ sa = se_cmd->t_task_cdb[1] & 0x1f;
+ if (sa != 0x00) {
+ pr_err("EXTENDED_COPY(LID4) not supported\n");
+ return TCM_UNSUPPORTED_SCSI_OPCODE;
+ }
+
+ if (se_cmd->data_length == 0) {
+ target_complete_cmd(se_cmd, SAM_STAT_GOOD);
+ return TCM_NO_SENSE;
+ }
+ if (se_cmd->data_length < XCOPY_HDR_LEN) {
+ pr_err("XCOPY parameter truncation: length %u < hdr_len %u\n",
+ se_cmd->data_length, XCOPY_HDR_LEN);
+ return TCM_PARAMETER_LIST_LENGTH_ERROR;
+ }
+
+ xop = kzalloc(sizeof(struct xcopy_op), GFP_KERNEL);
+ if (!xop)
+ goto err;
+ xop->xop_se_cmd = se_cmd;
+ INIT_WORK(&xop->xop_work, target_xcopy_do_work);
+ if (WARN_ON_ONCE(!queue_work(xcopy_wq, &xop->xop_work)))
+ goto free;
+ return TCM_NO_SENSE;
+
+free:
+ kfree(xop);
+
+err:
+ return TCM_OUT_OF_RESOURCES;
+}
+
static sense_reason_t target_rcr_operating_parameters(struct se_cmd *se_cmd)
{
unsigned char *p;