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Commit 85441e6b authored by Mike Christie's avatar Mike Christie Committed by Nicholas Bellinger
Browse files

target: add helper to find se_device by dev_index 



This adds a helper to find a se_device by dev_index. It will
be used in the next patches so tcmu's netlink interface can
execute commands on specific devices.

Signed-off-by: default avatarMike Christie <mchristi@redhat.com>
Reviewed-by: default avatarBart Van Assche <bart.vanassche@wdc.com>
Signed-off-by: default avatarNicholas Bellinger <nab@linux-iscsi.org>
parent 0a5eee64

drivers/target/target_core_device.c

+24 −0
Original line number Diff line number Diff line
@@ -880,6 +880,30 @@ 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(&g_device_mutex);

	dev = idr_find(&devices_idr, id);

	if (dev && do_depend && target_depend_item(&dev->dev_group.cg_item))

		dev = NULL;

	mutex_unlock(&g_device_mutex);

	return dev;

}

EXPORT_SYMBOL(target_find_device);



int target_configure_device(struct se_device *dev)

{

	struct se_hba *hba = dev->se_hba;

include/target/target_core_backend.h

+2 −0
Original line number Diff line number Diff line
@@ -106,6 +106,8 @@ bool target_lun_is_rdonly(struct se_cmd *); 
sense_reason_t passthrough_parse_cdb(struct se_cmd *cmd,

	sense_reason_t (*exec_cmd)(struct se_cmd *cmd));



struct	se_device *target_find_device(int id, bool do_depend);



bool target_sense_desc_format(struct se_device *dev);

sector_t target_to_linux_sector(struct se_device *dev, sector_t lb);

bool target_configure_unmap_from_queue(struct se_dev_attrib *attrib,