LIO: Add emulate_removable attribute

Commit Message

Phillip Susi Feb. 8, 2021, 6:54 p.m. UTC

Add another attribute that can be tuned via sysfs to have the
emulated scsi disk report that it is removable.
---
 drivers/target/target_core_configfs.c | 4 ++++
 drivers/target/target_core_spc.c      | 2 ++
 include/target/target_core_base.h     | 1 +
 3 files changed, 7 insertions(+)

Patch

diff --git a/drivers/target/target_core_configfs.c b/drivers/target/target_core_configfs.c
index f04352285155..2cecc0c1cc26 100644
--- a/drivers/target/target_core_configfs.c
+++ b/drivers/target/target_core_configfs.c
@@ -546,6 +546,7 @@  DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity);
 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity_alignment);
 DEF_CONFIGFS_ATTRIB_SHOW(unmap_zeroes_data);
 DEF_CONFIGFS_ATTRIB_SHOW(max_write_same_len);
+DEF_CONFIGFS_ATTRIB_SHOW(emulate_removable);
 
 #define DEF_CONFIGFS_ATTRIB_STORE_U32(_name)				\
 static ssize_t _name##_store(struct config_item *item, const char *page,\
@@ -589,6 +590,7 @@  DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_3pc);
 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_pr);
 DEF_CONFIGFS_ATTRIB_STORE_BOOL(enforce_pr_isids);
 DEF_CONFIGFS_ATTRIB_STORE_BOOL(is_nonrot);
+DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_removable);
 
 #define DEF_CONFIGFS_ATTRIB_STORE_STUB(_name)				\
 static ssize_t _name##_store(struct config_item *item, const char *page,\
@@ -1178,6 +1180,7 @@  CONFIGFS_ATTR(, emulate_tpws);
 CONFIGFS_ATTR(, emulate_caw);
 CONFIGFS_ATTR(, emulate_3pc);
 CONFIGFS_ATTR(, emulate_pr);
+CONFIGFS_ATTR(, emulate_removable);
 CONFIGFS_ATTR(, pi_prot_type);
 CONFIGFS_ATTR_RO(, hw_pi_prot_type);
 CONFIGFS_ATTR(, pi_prot_format);
@@ -1241,6 +1244,7 @@  struct configfs_attribute *sbc_attrib_attrs[] = {
 	&attr_max_write_same_len,
 	&attr_alua_support,
 	&attr_pgr_support,
+	&attr_emulate_removable,
 	NULL,
 };
 EXPORT_SYMBOL(sbc_attrib_attrs);
diff --git a/drivers/target/target_core_spc.c b/drivers/target/target_core_spc.c
index ca5579ebc81d..5af67a1e10f9 100644
--- a/drivers/target/target_core_spc.c
+++ b/drivers/target/target_core_spc.c
@@ -54,6 +54,8 @@  spc_emulate_inquiry_std(struct se_cmd *cmd, unsigned char *buf)
 	struct se_device *dev = cmd->se_dev;
 	struct se_session *sess = cmd->se_sess;
 
+	if (dev->dev_attrib.emulate_removable)
+		buf[1] = 0x80;
 	/* Set RMB (removable media) for tape devices */
 	if (dev->transport->get_device_type(dev) == TYPE_TAPE)
 		buf[1] = 0x80;
diff --git a/include/target/target_core_base.h b/include/target/target_core_base.h
index 63dd12124139..ae2396c1485a 100644
--- a/include/target/target_core_base.h
+++ b/include/target/target_core_base.h
@@ -692,6 +692,7 @@  struct se_dev_attrib {
 	bool		is_nonrot;
 	bool		emulate_rest_reord;
 	bool		unmap_zeroes_data;
+	bool		emulate_removable;
 	u32		hw_block_size;
 	u32		block_size;
 	u32		hw_max_sectors;