target/file: Add DIF protection support to fd_execute_rw
This patch adds support for DIF protection into fd_execute_rw() code
for WRITE/READ I/O using sbc_dif_verify_[write,read]() logic.
It adds fd_do_prot_rw() for handling interface with FILEIO PI, and
uses a locally allocated fd_prot->prot_buf + fd_prot->prot_sg for
interacting with SBC DIF verify emulation code.
Cc: Martin K. Petersen <martin.petersen@oracle.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Sagi Grimberg <sagig@mellanox.com>
Cc: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
diff --git a/drivers/target/target_core_file.h b/drivers/target/target_core_file.h
index 583691e..97e5e7dd 100644
--- a/drivers/target/target_core_file.h
+++ b/drivers/target/target_core_file.h
@@ -18,6 +18,11 @@
#define FDBD_HAS_BUFFERED_IO_WCE 0x04
#define FDBD_FORMAT_UNIT_SIZE 2048
+struct fd_prot {
+ unsigned char *prot_buf;
+ struct scatterlist *prot_sg;
+ u32 prot_sg_nents;
+};
struct fd_dev {
struct se_device dev;