target/file: Add DIF protection init/format support
This patch adds support for DIF protection init/format support into
the FILEIO backend.
It involves using a seperate $FILE.protection for storing PI that is
opened via fd_init_prot() using the common pi_prot_type attribute.
The actual formatting of the protection is done via fd_format_prot()
using the common pi_prot_format attribute, that will populate the
initial PI data based upon the currently configured pi_prot_type.
Based on original FILEIO code from Sagi.
v1 changes:
- Fix sparse warnings in fd_init_format_buf (Fengguang)
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 37ffc5b..583691e 100644
--- a/drivers/target/target_core_file.h
+++ b/drivers/target/target_core_file.h
@@ -4,6 +4,7 @@
#define FD_VERSION "4.0"
#define FD_MAX_DEV_NAME 256
+#define FD_MAX_DEV_PROT_NAME FD_MAX_DEV_NAME + 16
#define FD_DEVICE_QUEUE_DEPTH 32
#define FD_MAX_DEVICE_QUEUE_DEPTH 128
#define FD_BLOCKSIZE 512
@@ -15,6 +16,8 @@
#define FBDF_HAS_PATH 0x01
#define FBDF_HAS_SIZE 0x02
#define FDBD_HAS_BUFFERED_IO_WCE 0x04
+#define FDBD_FORMAT_UNIT_SIZE 2048
+
struct fd_dev {
struct se_device dev;
@@ -29,6 +32,7 @@
u32 fd_block_size;
unsigned long long fd_dev_size;
struct file *fd_file;
+ struct file *fd_prot_file;
/* FILEIO HBA device is connected to */
struct fd_host *fd_host;
} ____cacheline_aligned;