From ee920469d61e896d124fec528250ecfba1ec9f8d Mon Sep 17 00:00:00 2001
From: Nicholas Bellinger <nab@linux-iscsi.org>
Date: Sat, 28 Feb 2015 02:44:19 -0800
Subject: [PATCH] target/file: Add checks for backend DIF emulation
Make sure that FILEIO only attempts to use backend DIF emulation
when it's actually enabled at device level.
Cc: Martin Petersen <martin.petersen@oracle.com>
Cc: Sagi Grimberg <sagig@mellanox.com>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
---
drivers/target/target_core_file.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/target/target_core_file.c b/drivers/target/target_core_file.c
index cd9393545b7a3a..fa54835f398bc6 100644
--- a/drivers/target/target_core_file.c
+++ b/drivers/target/target_core_file.c
@@ -584,7 +584,7 @@ fd_execute_rw(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents,
if (data_direction == DMA_FROM_DEVICE) {
memset(&fd_prot, 0, sizeof(struct fd_prot));
- if (cmd->prot_type) {
+ if (cmd->prot_type && dev->dev_attrib.pi_prot_type) {
ret = fd_do_prot_rw(cmd, &fd_prot, false);
if (ret < 0)
return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
@@ -592,7 +592,7 @@ fd_execute_rw(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents,
ret = fd_do_rw(cmd, sgl, sgl_nents, 0);
- if (ret > 0 && cmd->prot_type) {
+ if (ret > 0 && cmd->prot_type && dev->dev_attrib.pi_prot_type) {
u32 sectors = cmd->data_length / dev->dev_attrib.block_size;
rc = sbc_dif_verify_read(cmd, cmd->t_task_lba, sectors,
@@ -608,7 +608,7 @@ fd_execute_rw(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents,
} else {
memset(&fd_prot, 0, sizeof(struct fd_prot));
- if (cmd->prot_type) {
+ if (cmd->prot_type && dev->dev_attrib.pi_prot_type) {
u32 sectors = cmd->data_length / dev->dev_attrib.block_size;
ret = fd_do_prot_rw(cmd, &fd_prot, false);
@@ -646,7 +646,7 @@ fd_execute_rw(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents,
vfs_fsync_range(fd_dev->fd_file, start, end, 1);
}
- if (ret > 0 && cmd->prot_type) {
+ if (ret > 0 && cmd->prot_type && dev->dev_attrib.pi_prot_type) {
ret = fd_do_prot_rw(cmd, &fd_prot, true);
if (ret < 0)
return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
--
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