target: Drop left-over fabric_max_sectors attribute

Now that fabric_max_sectors is no longer used to enforce the maximum
I/O size, go ahead and drop it's left-over usage in target-core and
associated backend drivers.

Cc: Christoph Hellwig <hch@lst.de>
Cc: Martin K. Petersen <martin.petersen@oracle.com>
Cc: Roland Dreier <roland@purestorage.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

drivers/target/target_core_device.c

@@ -1103,51 +1103,6 @@ int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth)
 }
 EXPORT_SYMBOL(se_dev_set_queue_depth);
 
-int se_dev_set_fabric_max_sectors(struct se_device *dev, u32 fabric_max_sectors)
-{
-	int block_size = dev->dev_attrib.block_size;
-
-	if (dev->export_count) {
-		pr_err("dev[%p]: Unable to change SE Device"
-			" fabric_max_sectors while export_count is %d\n",
-			dev, dev->export_count);
-		return -EINVAL;
-	}
-	if (!fabric_max_sectors) {
-		pr_err("dev[%p]: Illegal ZERO value for"
-			" fabric_max_sectors\n", dev);
-		return -EINVAL;
-	}
-	if (fabric_max_sectors < DA_STATUS_MAX_SECTORS_MIN) {
-		pr_err("dev[%p]: Passed fabric_max_sectors: %u less than"
-			" DA_STATUS_MAX_SECTORS_MIN: %u\n", dev, fabric_max_sectors,
-				DA_STATUS_MAX_SECTORS_MIN);
-		return -EINVAL;
-	}
-	if (fabric_max_sectors > DA_STATUS_MAX_SECTORS_MAX) {
-		pr_err("dev[%p]: Passed fabric_max_sectors: %u"
-			" greater than DA_STATUS_MAX_SECTORS_MAX:"
-			" %u\n", dev, fabric_max_sectors,
-			DA_STATUS_MAX_SECTORS_MAX);
-		return -EINVAL;
-	}
-	/*
-	 * Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks()
-	 */
-	if (!block_size) {
-		block_size = 512;
-		pr_warn("Defaulting to 512 for zero block_size\n");
-	}
-	fabric_max_sectors = se_dev_align_max_sectors(fabric_max_sectors,
-						      block_size);
-
-	dev->dev_attrib.fabric_max_sectors = fabric_max_sectors;
-	pr_debug("dev[%p]: SE Device max_sectors changed to %u\n",
-			dev, fabric_max_sectors);
-	return 0;
-}
-EXPORT_SYMBOL(se_dev_set_fabric_max_sectors);
-
 int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors)
 {
 	if (dev->export_count) {
@@ -1553,7 +1508,6 @@ struct se_device *target_alloc_device(struct se_hba *hba, const char *name)
 	dev->dev_attrib.unmap_granularity_alignment =
 				DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT;
 	dev->dev_attrib.max_write_same_len = DA_MAX_WRITE_SAME_LEN;
-	dev->dev_attrib.fabric_max_sectors = DA_FABRIC_MAX_SECTORS;
 
 	xcopy_lun = &dev->xcopy_lun;
 	xcopy_lun->lun_se_dev = dev;

drivers/target/target_core_file.c

@@ -968,7 +968,6 @@ static struct configfs_attribute *fileio_backend_dev_attrs[] = {
 	&fileio_dev_attrib_hw_block_size.attr,
 	&fileio_dev_attrib_block_size.attr,
 	&fileio_dev_attrib_hw_max_sectors.attr,
-	&fileio_dev_attrib_fabric_max_sectors.attr,
 	&fileio_dev_attrib_optimal_sectors.attr,
 	&fileio_dev_attrib_hw_queue_depth.attr,
 	&fileio_dev_attrib_queue_depth.attr,

drivers/target/target_core_iblock.c

@@ -883,7 +883,6 @@ static struct configfs_attribute *iblock_backend_dev_attrs[] = {
 	&iblock_dev_attrib_hw_block_size.attr,
 	&iblock_dev_attrib_block_size.attr,
 	&iblock_dev_attrib_hw_max_sectors.attr,
-	&iblock_dev_attrib_fabric_max_sectors.attr,
 	&iblock_dev_attrib_optimal_sectors.attr,
 	&iblock_dev_attrib_hw_queue_depth.attr,
 	&iblock_dev_attrib_queue_depth.attr,

drivers/target/target_core_rd.c

@@ -657,7 +657,6 @@ static struct configfs_attribute *rd_mcp_backend_dev_attrs[] = {
 	&rd_mcp_dev_attrib_hw_block_size.attr,
 	&rd_mcp_dev_attrib_block_size.attr,
 	&rd_mcp_dev_attrib_hw_max_sectors.attr,
-	&rd_mcp_dev_attrib_fabric_max_sectors.attr,
 	&rd_mcp_dev_attrib_optimal_sectors.attr,
 	&rd_mcp_dev_attrib_hw_queue_depth.attr,
 	&rd_mcp_dev_attrib_queue_depth.attr,

drivers/target/target_core_user.c

@@ -1118,7 +1118,6 @@ static struct configfs_attribute *tcmu_backend_dev_attrs[] = {
 	&tcmu_dev_attrib_hw_block_size.attr,
 	&tcmu_dev_attrib_block_size.attr,
 	&tcmu_dev_attrib_hw_max_sectors.attr,
-	&tcmu_dev_attrib_fabric_max_sectors.attr,
 	&tcmu_dev_attrib_optimal_sectors.attr,
 	&tcmu_dev_attrib_hw_queue_depth.attr,
 	&tcmu_dev_attrib_queue_depth.attr,

include/target/target_core_backend.h

@@ -135,7 +135,6 @@ int	se_dev_set_is_nonrot(struct se_device *, int);
 int	se_dev_set_emulate_rest_reord(struct se_device *dev, int);
 int	se_dev_set_queue_depth(struct se_device *, u32);
 int	se_dev_set_max_sectors(struct se_device *, u32);
-int	se_dev_set_fabric_max_sectors(struct se_device *, u32);
 int	se_dev_set_optimal_sectors(struct se_device *, u32);
 int	se_dev_set_block_size(struct se_device *, u32);
 

include/target/target_core_backend_configfs.h

@@ -98,8 +98,6 @@ static struct target_backend_dev_attrib_attribute _backend##_dev_attrib_##_name
 	TB_DEV_ATTR(_backend, block_size, S_IRUGO | S_IWUSR);		\
 	DEF_TB_DEV_ATTRIB_RO(_backend, hw_max_sectors);			\
 	TB_DEV_ATTR_RO(_backend, hw_max_sectors);			\
-	DEF_TB_DEV_ATTRIB(_backend, fabric_max_sectors);		\
-	TB_DEV_ATTR(_backend, fabric_max_sectors, S_IRUGO | S_IWUSR);	\
 	DEF_TB_DEV_ATTRIB(_backend, optimal_sectors);			\
 	TB_DEV_ATTR(_backend, optimal_sectors, S_IRUGO | S_IWUSR);	\
 	DEF_TB_DEV_ATTRIB_RO(_backend, hw_queue_depth);			\

include/target/target_core_base.h

@@ -77,8 +77,6 @@
 #define DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT	0
 /* Default max_write_same_len, disabled by default */
 #define DA_MAX_WRITE_SAME_LEN			0
-/* Default max transfer length */
-#define DA_FABRIC_MAX_SECTORS			8192
 /* Use a model alias based on the configfs backend device name */
 #define DA_EMULATE_MODEL_ALIAS			0
 /* Emulation for Direct Page Out */
@@ -694,7 +692,6 @@ struct se_dev_attrib {
 	u32		hw_block_size;
 	u32		block_size;
 	u32		hw_max_sectors;
-	u32		fabric_max_sectors;
 	u32		optimal_sectors;
 	u32		hw_queue_depth;
 	u32		queue_depth;