From: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>
This patch allows backend driver sbc_ops function pointers
to be accessed externally, so external target consumers
can perform target_iostate + target_iomem I/O submission
outside of /sys/kernel/config/target/$FABRIC/ users.
Specifically, IBLOCK, FILEIO, and RAMDISK have been
enabled, while PSCSI and TCMU have left sbc_ops NULL
as they perform SCSI CDB pass-through.
Cc: Jens Axboe <axboe@xxxxxx>
Cc: Christoph Hellwig <hch@xxxxxx>
Cc: Martin Petersen <martin.petersen@xxxxxxxxxx>
Cc: Sagi Grimberg <sagi@xxxxxxxxxxx>
Cc: Hannes Reinecke <hare@xxxxxxx>
Cc: Mike Christie <michaelc@xxxxxxxxxxx>
Signed-off-by: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>
---
drivers/target/target_core_file.c | 1 +
drivers/target/target_core_iblock.c | 1 +
drivers/target/target_core_pscsi.c | 1 +
drivers/target/target_core_rd.c | 1 +
drivers/target/target_core_user.c | 1 +
include/target/target_core_backend.h | 4 ++++
6 files changed, 9 insertions(+)
diff --git a/drivers/target/target_core_file.c b/drivers/target/target_core_file.c
index b4956a5e..6f0064e 100644
--- a/drivers/target/target_core_file.c
+++ b/drivers/target/target_core_file.c
@@ -815,6 +815,7 @@ static const struct target_backend_ops fileio_ops = {
.inquiry_prod = "FILEIO",
.inquiry_rev = FD_VERSION,
.owner = THIS_MODULE,
+ .sbc_ops = &fd_sbc_ops,
.attach_hba = fd_attach_hba,
.detach_hba = fd_detach_hba,
.alloc_device = fd_alloc_device,
diff --git a/drivers/target/target_core_iblock.c b/drivers/target/target_core_iblock.c
index 00781c8..29d3167 100644
--- a/drivers/target/target_core_iblock.c
+++ b/drivers/target/target_core_iblock.c
@@ -833,6 +833,7 @@ static const struct target_backend_ops iblock_ops = {
.inquiry_prod = "IBLOCK",
.inquiry_rev = IBLOCK_VERSION,
.owner = THIS_MODULE,
+ .sbc_ops = &iblock_sbc_ops,
.attach_hba = iblock_attach_hba,
.detach_hba = iblock_detach_hba,
.alloc_device = iblock_alloc_device,
diff --git a/drivers/target/target_core_pscsi.c b/drivers/target/target_core_pscsi.c
index c52f943..4284dbf 100644
--- a/drivers/target/target_core_pscsi.c
+++ b/drivers/target/target_core_pscsi.c
@@ -1127,6 +1127,7 @@ static void pscsi_req_done(struct request *req, int uptodate)
static const struct target_backend_ops pscsi_ops = {
.name = "pscsi",
.owner = THIS_MODULE,
+ .sbc_ops = NULL,
.transport_flags = TRANSPORT_FLAG_PASSTHROUGH,
.attach_hba = pscsi_attach_hba,
.detach_hba = pscsi_detach_hba,
diff --git a/drivers/target/target_core_rd.c b/drivers/target/target_core_rd.c
index a38a37f..e9df036 100644
--- a/drivers/target/target_core_rd.c
+++ b/drivers/target/target_core_rd.c
@@ -662,6 +662,7 @@ static const struct target_backend_ops rd_mcp_ops = {
.name = "rd_mcp",
.inquiry_prod = "RAMDISK-MCP",
.inquiry_rev = RD_MCP_VERSION,
+ .sbc_ops = &rd_sbc_ops,
.attach_hba = rd_attach_hba,
.detach_hba = rd_detach_hba,
.alloc_device = rd_alloc_device,
diff --git a/drivers/target/target_core_user.c b/drivers/target/target_core_user.c
index 3467560..ec6142b 100644
--- a/drivers/target/target_core_user.c
+++ b/drivers/target/target_core_user.c
@@ -1151,6 +1151,7 @@ static const struct target_backend_ops tcmu_ops = {
.name = "user",
.owner = THIS_MODULE,
.transport_flags = TRANSPORT_FLAG_PASSTHROUGH,
+ .sbc_ops = NULL,
.attach_hba = tcmu_attach_hba,
.detach_hba = tcmu_detach_hba,
.alloc_device = tcmu_alloc_device,
diff --git a/include/target/target_core_backend.h b/include/target/target_core_backend.h
index 9efe718..15f731f 100644
--- a/include/target/target_core_backend.h
+++ b/include/target/target_core_backend.h
@@ -8,6 +8,10 @@ struct target_backend_ops {
char inquiry_prod[16];
char inquiry_rev[4];
struct module *owner;
+ /*
+ * Used by NVMe-target for se_cmd dispatch without SCSI CDB parsing
+ */
+ struct sbc_ops *sbc_ops;
u8 transport_flags;
--
1.9.1
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