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-rw-r--r--drivers/target/target_core_device.c30
-rw-r--r--drivers/target/target_core_file.c4
-rw-r--r--drivers/target/target_core_internal.h2
-rw-r--r--drivers/target/target_core_sbc.c5
-rw-r--r--drivers/target/target_core_spc.c12
-rw-r--r--drivers/target/target_core_transport.c19
-rw-r--r--include/target/target_core_base.h6
7 files changed, 40 insertions, 38 deletions
diff --git a/drivers/target/target_core_device.c b/drivers/target/target_core_device.c
index ce5f768..9ee194d 100644
--- a/drivers/target/target_core_device.c
+++ b/drivers/target/target_core_device.c
@@ -760,16 +760,8 @@ EXPORT_SYMBOL(se_dev_set_emulate_model_alias);
int se_dev_set_emulate_dpo(struct se_device *dev, int flag)
{
- if (flag != 0 && flag != 1) {
- pr_err("Illegal value %d\n", flag);
- return -EINVAL;
- }
-
- if (flag) {
- pr_err("dpo_emulated not supported\n");
- return -EINVAL;
- }
-
+ printk_once(KERN_WARNING
+ "ignoring deprecated emulate_dpo attribute\n");
return 0;
}
EXPORT_SYMBOL(se_dev_set_emulate_dpo);
@@ -799,16 +791,8 @@ EXPORT_SYMBOL(se_dev_set_emulate_fua_write);
int se_dev_set_emulate_fua_read(struct se_device *dev, int flag)
{
- if (flag != 0 && flag != 1) {
- pr_err("Illegal value %d\n", flag);
- return -EINVAL;
- }
-
- if (flag) {
- pr_err("ua read emulated not supported\n");
- return -EINVAL;
- }
-
+ printk_once(KERN_WARNING
+ "ignoring deprecated emulate_fua_read attribute\n");
return 0;
}
EXPORT_SYMBOL(se_dev_set_emulate_fua_read);
@@ -1513,9 +1497,9 @@ struct se_device *target_alloc_device(struct se_hba *hba, const char *name)
dev->dev_attrib.da_dev = dev;
dev->dev_attrib.emulate_model_alias = DA_EMULATE_MODEL_ALIAS;
- dev->dev_attrib.emulate_dpo = DA_EMULATE_DPO;
- dev->dev_attrib.emulate_fua_write = DA_EMULATE_FUA_WRITE;
- dev->dev_attrib.emulate_fua_read = DA_EMULATE_FUA_READ;
+ dev->dev_attrib.emulate_dpo = 1;
+ dev->dev_attrib.emulate_fua_write = 1;
+ dev->dev_attrib.emulate_fua_read = 1;
dev->dev_attrib.emulate_write_cache = DA_EMULATE_WRITE_CACHE;
dev->dev_attrib.emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL;
dev->dev_attrib.emulate_tas = DA_EMULATE_TAS;
diff --git a/drivers/target/target_core_file.c b/drivers/target/target_core_file.c
index fe6c19c..e865885 100644
--- a/drivers/target/target_core_file.c
+++ b/drivers/target/target_core_file.c
@@ -610,9 +610,7 @@ fd_execute_rw(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents,
* for SCSI WRITEs with Forced Unit Access (FUA) set.
* Allow this to happen independent of WCE=0 setting.
*/
- if (ret > 0 &&
- dev->dev_attrib.emulate_fua_write > 0 &&
- (cmd->se_cmd_flags & SCF_FUA)) {
+ if (ret > 0 && (cmd->se_cmd_flags & SCF_FUA)) {
loff_t start = cmd->t_task_lba *
dev->dev_attrib.block_size;
loff_t end;
diff --git a/drivers/target/target_core_internal.h b/drivers/target/target_core_internal.h
index 68bd7f5..75338c3 100644
--- a/drivers/target/target_core_internal.h
+++ b/drivers/target/target_core_internal.h
@@ -81,6 +81,8 @@ int transport_clear_lun_ref(struct se_lun *);
void transport_send_task_abort(struct se_cmd *);
sense_reason_t target_cmd_size_check(struct se_cmd *cmd, unsigned int size);
void target_qf_do_work(struct work_struct *work);
+bool target_check_wce(struct se_device *dev);
+bool target_check_fua(struct se_device *dev);
/* target_core_stat.c */
void target_stat_setup_dev_default_groups(struct se_device *);
diff --git a/drivers/target/target_core_sbc.c b/drivers/target/target_core_sbc.c
index 3df2cd5..d441975 100644
--- a/drivers/target/target_core_sbc.c
+++ b/drivers/target/target_core_sbc.c
@@ -738,14 +738,15 @@ static int
sbc_check_dpofua(struct se_device *dev, struct se_cmd *cmd, unsigned char *cdb)
{
if (cdb[1] & 0x10) {
- if (!dev->dev_attrib.emulate_dpo) {
+ /* see explanation in spc_emulate_modesense */
+ if (!target_check_fua(dev)) {
pr_err("Got CDB: 0x%02x with DPO bit set, but device"
" does not advertise support for DPO\n", cdb[0]);
return -EINVAL;
}
}
if (cdb[1] & 0x8) {
- if (!dev->dev_attrib.emulate_fua_write || !se_dev_check_wce(dev)) {
+ if (!target_check_fua(dev)) {
pr_err("Got CDB: 0x%02x with FUA bit set, but device"
" does not advertise support for FUA write\n",
cdb[0]);
diff --git a/drivers/target/target_core_spc.c b/drivers/target/target_core_spc.c
index 7912aa1..988c158 100644
--- a/drivers/target/target_core_spc.c
+++ b/drivers/target/target_core_spc.c
@@ -481,7 +481,7 @@ spc_emulate_evpd_86(struct se_cmd *cmd, unsigned char *buf)
buf[5] = 0x07;
/* If WriteCache emulation is enabled, set V_SUP */
- if (se_dev_check_wce(dev))
+ if (target_check_wce(dev))
buf[6] = 0x01;
/* If an LBA map is present set R_SUP */
spin_lock(&cmd->se_dev->t10_alua.lba_map_lock);
@@ -888,7 +888,7 @@ static int spc_modesense_caching(struct se_cmd *cmd, u8 pc, u8 *p)
if (pc == 1)
goto out;
- if (se_dev_check_wce(dev))
+ if (target_check_wce(dev))
p[2] = 0x04; /* Write Cache Enable */
p[12] = 0x20; /* Disabled Read Ahead */
@@ -1000,8 +1000,12 @@ static sense_reason_t spc_emulate_modesense(struct se_cmd *cmd)
(cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)))
spc_modesense_write_protect(&buf[length], type);
- if ((se_dev_check_wce(dev)) &&
- (dev->dev_attrib.emulate_fua_write > 0))
+ /*
+ * SBC only allows us to enable FUA and DPO together. Fortunately
+ * DPO is explicitly specified as a hint, so a noop is a perfectly
+ * valid implementation.
+ */
+ if (target_check_fua(dev))
spc_modesense_dpofua(&buf[length], type);
++length;
diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c
index 105f4fd..231812d 100644
--- a/drivers/target/target_core_transport.c
+++ b/drivers/target/target_core_transport.c
@@ -3075,3 +3075,22 @@ int transport_generic_handle_tmr(
return 0;
}
EXPORT_SYMBOL(transport_generic_handle_tmr);
+
+bool
+target_check_wce(struct se_device *dev)
+{
+ bool wce = false;
+
+ if (dev->transport->get_write_cache)
+ wce = dev->transport->get_write_cache(dev);
+ else if (dev->dev_attrib.emulate_write_cache > 0)
+ wce = true;
+
+ return wce;
+}
+
+bool
+target_check_fua(struct se_device *dev)
+{
+ return target_check_wce(dev) && dev->dev_attrib.emulate_fua_write > 0;
+}
diff --git a/include/target/target_core_base.h b/include/target/target_core_base.h
index 480e9f8..7f4c7de 100644
--- a/include/target/target_core_base.h
+++ b/include/target/target_core_base.h
@@ -79,12 +79,6 @@
#define DA_MAX_WRITE_SAME_LEN 0
/* Use a model alias based on the configfs backend device name */
#define DA_EMULATE_MODEL_ALIAS 0
-/* Emulation for Direct Page Out */
-#define DA_EMULATE_DPO 0
-/* Emulation for Forced Unit Access WRITEs */
-#define DA_EMULATE_FUA_WRITE 1
-/* Emulation for Forced Unit Access READs */
-#define DA_EMULATE_FUA_READ 0
/* Emulation for WriteCache and SYNCHRONIZE_CACHE */
#define DA_EMULATE_WRITE_CACHE 0
/* Emulation for UNIT ATTENTION Interlock Control */
generated by cgit v0.10.2 at 2024-07-11 23:51:27 (GMT)