[PATCH 02/27] target: pass a block_device to target_configure_unmap_from_queue

[Christoph Hellwig <hch@xxxxxx>]

The SCSI target drivers is a consumer of the block layer and shoul
d generally work on struct block_device.

Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Reviewed-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
---
 drivers/target/target_core_device.c  | 5 +++--
 drivers/target/target_core_file.c    | 7 ++++---
 drivers/target/target_core_iblock.c  | 2 +-
 include/target/target_core_backend.h | 4 ++--
 4 files changed, 10 insertions(+), 8 deletions(-)

diff --git a/drivers/target/target_core_device.c 
b/drivers/target/target_core_device.c
index fa866acef5bb2..3a1ec705cd80b 100644
--- a/drivers/target/target_core_device.c
+++ b/drivers/target/target_core_device.c
@@ -834,9 +834,10 @@ struct se_device *target_alloc_device(struct se_hba *hba, 
const char *name)
  * in ATA and we need to set TPE=1
  */
 bool target_configure_unmap_from_queue(struct se_dev_attrib *attrib,
-                                      struct request_queue *q)
+                                      struct block_device *bdev)
 {
-       int block_size = queue_logical_block_size(q);
+       struct request_queue *q = bdev_get_queue(bdev);
+       int block_size = bdev_logical_block_size(bdev);
 
        if (!blk_queue_discard(q))
                return false;
diff --git a/drivers/target/target_core_file.c 
b/drivers/target/target_core_file.c
index 8190b840065f3..8d191fdc33217 100644
--- a/drivers/target/target_core_file.c
+++ b/drivers/target/target_core_file.c
@@ -134,10 +134,11 @@ static int fd_configure_device(struct se_device *dev)
         */
        inode = file->f_mapping->host;
        if (S_ISBLK(inode->i_mode)) {
-               struct request_queue *q = bdev_get_queue(I_BDEV(inode));
+               struct block_device *bdev = I_BDEV(inode);
+               struct request_queue *q = bdev_get_queue(bdev);
                unsigned long long dev_size;
 
-               fd_dev->fd_block_size = bdev_logical_block_size(I_BDEV(inode));
+               fd_dev->fd_block_size = bdev_logical_block_size(bdev);
                /*
                 * Determine the number of bytes from i_size_read() minus
                 * one (1) logical sector from underlying struct block_device
@@ -150,7 +151,7 @@ static int fd_configure_device(struct se_device *dev)
                        dev_size, div_u64(dev_size, fd_dev->fd_block_size),
                        fd_dev->fd_block_size);
 
-               if (target_configure_unmap_from_queue(&dev->dev_attrib, q))
+               if (target_configure_unmap_from_queue(&dev->dev_attrib, bdev))
                        pr_debug("IFILE: BLOCK Discard support available,"
                                 " disabled by default\n");
                /*
diff --git a/drivers/target/target_core_iblock.c 
b/drivers/target/target_core_iblock.c
index 87ede165ddba4..b886ce1770bfd 100644
--- a/drivers/target/target_core_iblock.c
+++ b/drivers/target/target_core_iblock.c
@@ -119,7 +119,7 @@ static int iblock_configure_device(struct se_device *dev)
        dev->dev_attrib.hw_max_sectors = queue_max_hw_sectors(q);
        dev->dev_attrib.hw_queue_depth = q->nr_requests;
 
-       if (target_configure_unmap_from_queue(&dev->dev_attrib, q))
+       if (target_configure_unmap_from_queue(&dev->dev_attrib, bd))
                pr_debug("IBLOCK: BLOCK Discard support available,"
                         " disabled by default\n");
 
diff --git a/include/target/target_core_backend.h 
b/include/target/target_core_backend.h
index 675f3a1fe6139..773963a1e0b53 100644
--- a/include/target/target_core_backend.h
+++ b/include/target/target_core_backend.h
@@ -14,7 +14,7 @@
 #define TRANSPORT_FLAG_PASSTHROUGH_ALUA                0x2
 #define TRANSPORT_FLAG_PASSTHROUGH_PGR          0x4
 
-struct request_queue;
+struct block_device;
 struct scatterlist;
 
 struct target_backend_ops {
@@ -117,7 +117,7 @@ sense_reason_t passthrough_parse_cdb(struct se_cmd *cmd,
 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,
-                                      struct request_queue *q);
+                                      struct block_device *bdev);
 
 static inline bool target_dev_configured(struct se_device *se_dev)
 {
-- 
2.30.2