+ ret = strtobool(page, &flag);
+ if (ret < 0)
+ return ret;
+
+ /*
+ * We expect this value to be non-zero when generic Block Layer
+ * Discard supported is detected iblock_create_virtdevice().
+ */
+ if (flag && !da->max_unmap_block_desc_count) {
+ pr_err("Generic Block Discard not supported\n");
+ return -ENOSYS;
+ }
+
+ da->emulate_tpu = flag;
+ pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
+ da->da_dev, flag);
+ return count;
+}
+
+static ssize_t emulate_tpws_store(struct config_item *item,
+ const char *page, size_t count)
+{
+ struct se_dev_attrib *da = to_attrib(item);
+ bool flag;
+ int ret;
+
+ ret = strtobool(page, &flag);
+ if (ret < 0)
+ return ret;
+
+ /*
+ * We expect this value to be non-zero when generic Block Layer
+ * Discard supported is detected iblock_create_virtdevice().
+ */
+ if (flag && !da->max_unmap_block_desc_count) {
+ pr_err("Generic Block Discard not supported\n");
+ return -ENOSYS;
+ }
+
+ da->emulate_tpws = flag;
+ pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
+ da->da_dev, flag);
+ return count;
+}
+
+static ssize_t pi_prot_type_store(struct config_item *item,
+ const char *page, size_t count)
+{
+ struct se_dev_attrib *da = to_attrib(item);
+ int old_prot = da->pi_prot_type, ret;
+ struct se_device *dev = da->da_dev;
+ u32 flag;
+
+ ret = kstrtou32(page, 0, &flag);
+ if (ret < 0)
+ return ret;
+
+ if (flag != 0 && flag != 1 && flag != 2 && flag != 3) {
+ pr_err("Illegal value %d for pi_prot_type\n", flag);
+ return -EINVAL;
+ }
+ if (flag == 2) {
+ pr_err("DIF TYPE2 protection currently not supported\n");
+ return -ENOSYS;
+ }
+ if (da->hw_pi_prot_type) {
+ pr_warn("DIF protection enabled on underlying hardware,"
+ " ignoring\n");
+ return count;
+ }
+ if (!dev->transport->init_prot || !dev->transport->free_prot) {
+ /* 0 is only allowed value for non-supporting backends */
+ if (flag == 0)
+ return count;
+
+ pr_err("DIF protection not supported by backend: %s\n",
+ dev->transport->name);
+ return -ENOSYS;
+ }
+ if (!(dev->dev_flags & DF_CONFIGURED)) {
+ pr_err("DIF protection requires device to be configured\n");
+ return -ENODEV;
+ }
+ if (dev->export_count) {
+ pr_err("dev[%p]: Unable to change SE Device PROT type while"
+ " export_count is %d\n", dev, dev->export_count);
+ return -EINVAL;
+ }
+
+ da->pi_prot_type = flag;
+
+ if (flag && !old_prot) {
+ ret = dev->transport->init_prot(dev);
+ if (ret) {
+ da->pi_prot_type = old_prot;
+ return ret;
+ }
+
+ } else if (!flag && old_prot) {
+ dev->transport->free_prot(dev);
+ }
+
+ pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag);
+ return count;
+}
+
+static ssize_t pi_prot_format_store(struct config_item *item,
+ const char *page, size_t count)
+{
+ struct se_dev_attrib *da = to_attrib(item);
+ struct se_device *dev = da->da_dev;
+ bool flag;
+ int ret;
+
+ ret = strtobool(page, &flag);
+ if (ret < 0)
+ return ret;
+
+ if (!flag)
+ return count;
+
+ if (!dev->transport->format_prot) {
+ pr_err("DIF protection format not supported by backend %s\n",
+ dev->transport->name);
+ return -ENOSYS;
+ }
+ if (!(dev->dev_flags & DF_CONFIGURED)) {
+ pr_err("DIF protection format requires device to be configured\n");
+ return -ENODEV;
+ }
+ if (dev->export_count) {
+ pr_err("dev[%p]: Unable to format SE Device PROT type while"
+ " export_count is %d\n", dev, dev->export_count);
+ return -EINVAL;
+ }
+
+ ret = dev->transport->format_prot(dev);
+ if (ret)
+ return ret;
+
+ pr_debug("dev[%p]: SE Device Protection Format complete\n", dev);
+ return count;
+}
+
+static ssize_t force_pr_aptpl_store(struct config_item *item,
+ const char *page, size_t count)
+{
+ struct se_dev_attrib *da = to_attrib(item);
+ bool flag;
+ int ret;
+
+ ret = strtobool(page, &flag);
+ if (ret < 0)
+ return ret;
+ if (da->da_dev->export_count) {
+ pr_err("dev[%p]: Unable to set force_pr_aptpl while"
+ " export_count is %d\n",
+ da->da_dev, da->da_dev->export_count);
+ return -EINVAL;
+ }
+
+ da->force_pr_aptpl = flag;
+ pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", da->da_dev, flag);
+ return count;
+}
+
+static ssize_t emulate_rest_reord_store(struct config_item *item,
+ const char *page, size_t count)
+{
+ struct se_dev_attrib *da = to_attrib(item);
+ bool flag;
+ int ret;
+
+ ret = strtobool(page, &flag);
+ if (ret < 0)
+ return ret;
+
+ if (flag != 0) {
+ printk(KERN_ERR "dev[%p]: SE Device emulation of restricted"
+ " reordering not implemented\n", da->da_dev);
+ return -ENOSYS;
+ }
+ da->emulate_rest_reord = flag;
+ pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n",
+ da->da_dev, flag);
+ return count;
+}
+
+/*
+ * Note, this can only be called on unexported SE Device Object.
+ */
+static ssize_t queue_depth_store(struct config_item *item,
+ const char *page, size_t count)
+{
+ struct se_dev_attrib *da = to_attrib(item);
+ struct se_device *dev = da->da_dev;
+ u32 val;
+ int ret;
+
+ ret = kstrtou32(page, 0, &val);
+ if (ret < 0)
+ return ret;
+
+ if (dev->export_count) {
+ pr_err("dev[%p]: Unable to change SE Device TCQ while"
+ " export_count is %d\n",
+ dev, dev->export_count);
+ return -EINVAL;
+ }
+ if (!val) {
+ pr_err("dev[%p]: Illegal ZERO value for queue_depth\n", dev);
+ return -EINVAL;
+ }
+
+ if (val > dev->dev_attrib.queue_depth) {
+ if (val > dev->dev_attrib.hw_queue_depth) {
+ pr_err("dev[%p]: Passed queue_depth:"
+ " %u exceeds TCM/SE_Device MAX"
+ " TCQ: %u\n", dev, val,
+ dev->dev_attrib.hw_queue_depth);
+ return -EINVAL;
+ }
+ }
+ da->queue_depth = dev->queue_depth = val;
+ pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", dev, val);
+ return count;
+}
+
+static ssize_t optimal_sectors_store(struct config_item *item,
+ const char *page, size_t count)
+{
+ struct se_dev_attrib *da = to_attrib(item);
+ u32 val;
+ int ret;
+
+ ret = kstrtou32(page, 0, &val);
+ if (ret < 0)
+ return ret;
+
+ if (da->da_dev->export_count) {
+ pr_err("dev[%p]: Unable to change SE Device"
+ " optimal_sectors while export_count is %d\n",
+ da->da_dev, da->da_dev->export_count);
+ return -EINVAL;
+ }
+ if (val > da->hw_max_sectors) {
+ pr_err("dev[%p]: Passed optimal_sectors %u cannot be"
+ " greater than hw_max_sectors: %u\n",
+ da->da_dev, val, da->hw_max_sectors);
+ return -EINVAL;
+ }
+
+ da->optimal_sectors = val;
+ pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n",
+ da->da_dev, val);
+ return count;
+}
+
+static ssize_t block_size_store(struct config_item *item,
+ const char *page, size_t count)
+{
+ struct se_dev_attrib *da = to_attrib(item);
+ u32 val;
+ int ret;
+
+ ret = kstrtou32(page, 0, &val);
+ if (ret < 0)
+ return ret;
+
+ if (da->da_dev->export_count) {
+ pr_err("dev[%p]: Unable to change SE Device block_size"
+ " while export_count is %d\n",
+ da->da_dev, da->da_dev->export_count);
+ return -EINVAL;
+ }
+
+ if (val != 512 && val != 1024 && val != 2048 && val != 4096) {
+ pr_err("dev[%p]: Illegal value for block_device: %u"
+ " for SE device, must be 512, 1024, 2048 or 4096\n",
+ da->da_dev, val);
+ return -EINVAL;
+ }
+
+ da->block_size = val;
+ if (da->max_bytes_per_io)
+ da->hw_max_sectors = da->max_bytes_per_io / val;
+
+ pr_debug("dev[%p]: SE Device block_size changed to %u\n",
+ da->da_dev, val);
+ return count;
+}
+
+CONFIGFS_ATTR(, emulate_model_alias);
+CONFIGFS_ATTR(, emulate_dpo);
+CONFIGFS_ATTR(, emulate_fua_write);
+CONFIGFS_ATTR(, emulate_fua_read);
+CONFIGFS_ATTR(, emulate_write_cache);
+CONFIGFS_ATTR(, emulate_ua_intlck_ctrl);
+CONFIGFS_ATTR(, emulate_tas);
+CONFIGFS_ATTR(, emulate_tpu);
+CONFIGFS_ATTR(, emulate_tpws);
+CONFIGFS_ATTR(, emulate_caw);
+CONFIGFS_ATTR(, emulate_3pc);
+CONFIGFS_ATTR(, pi_prot_type);
+CONFIGFS_ATTR_RO(, hw_pi_prot_type);
+CONFIGFS_ATTR(, pi_prot_format);
+CONFIGFS_ATTR(, enforce_pr_isids);
+CONFIGFS_ATTR(, is_nonrot);
+CONFIGFS_ATTR(, emulate_rest_reord);
+CONFIGFS_ATTR(, force_pr_aptpl);
+CONFIGFS_ATTR_RO(, hw_block_size);
+CONFIGFS_ATTR(, block_size);
+CONFIGFS_ATTR_RO(, hw_max_sectors);
+CONFIGFS_ATTR(, optimal_sectors);
+CONFIGFS_ATTR_RO(, hw_queue_depth);
+CONFIGFS_ATTR(, queue_depth);
+CONFIGFS_ATTR(, max_unmap_lba_count);
+CONFIGFS_ATTR(, max_unmap_block_desc_count);
+CONFIGFS_ATTR(, unmap_granularity);
+CONFIGFS_ATTR(, unmap_granularity_alignment);
+CONFIGFS_ATTR(, max_write_same_len);
+
+/*
+ * dev_attrib attributes for devices using the target core SBC/SPC
+ * interpreter. Any backend using spc_parse_cdb should be using
+ * these.
+ */
+struct configfs_attribute *sbc_attrib_attrs[] = {
+ &attr_emulate_model_alias,
+ &attr_emulate_dpo,
+ &attr_emulate_fua_write,
+ &attr_emulate_fua_read,
+ &attr_emulate_write_cache,
+ &attr_emulate_ua_intlck_ctrl,
+ &attr_emulate_tas,
+ &attr_emulate_tpu,
+ &attr_emulate_tpws,
+ &attr_emulate_caw,
+ &attr_emulate_3pc,
+ &attr_pi_prot_type,
+ &attr_hw_pi_prot_type,
+ &attr_pi_prot_format,
+ &attr_enforce_pr_isids,
+ &attr_is_nonrot,
+ &attr_emulate_rest_reord,
+ &attr_force_pr_aptpl,
+ &attr_hw_block_size,
+ &attr_block_size,
+ &attr_hw_max_sectors,
+ &attr_optimal_sectors,
+ &attr_hw_queue_depth,
+ &attr_queue_depth,
+ &attr_max_unmap_lba_count,
+ &attr_max_unmap_block_desc_count,
+ &attr_unmap_granularity,
+ &attr_unmap_granularity_alignment,
+ &attr_max_write_same_len,
+ NULL,