[PATCH 1/2] nvme: add API for sending admin commands by bdev

Robert Baldyga
2019-09-13T11:16:20Z

From: Michal Rakowski <michal.rakowski@intel.com>

Add kernel API function for sending nvme admin commands.

Signed-off-by: Michal Rakowski <michal.rakowski@intel.com>
Signed-off-by: Robert Baldyga <robert.baldyga@intel.com>
---
drivers/nvme/host/core.c | 23 +++++++++++++++++++++++
include/linux/nvme.h | 3 +++
2 files changed, 26 insertions(+)

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index d3d6b7bd6903..06f917f391c4 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -812,6 +812,29 @@ int nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,
}
EXPORT_SYMBOL_GPL(nvme_submit_sync_cmd);

+int nvme_submit_admin_cmd_by_bdev(struct block_device *bdev,
+ struct nvme_command *c, void *buffer, unsigned int bufflen)
+{
+ struct nvme_ns *ns;
+ struct nvme_ctrl *ctrl;
+ int error;
+
+ if (!bdev && !c)
+ return -EINVAL;
+
+ ns = bdev->bd_disk->private_data;
+ ctrl = ns->ctrl;
+
+ error = nvme_submit_sync_cmd(ctrl->admin_q, c, buffer, bufflen);
+ if (error) {
+ dev_warn(ctrl->device, "Admin command failed (%d)\n", error);
+ return error;
+ }
+
+ return error;
+}
+EXPORT_SYMBOL_GPL(nvme_submit_admin_cmd_by_bdev);
+
static void *nvme_add_user_metadata(struct bio *bio, void __user *ubuf,
unsigned len, u32 seed, bool write)
{
diff --git a/include/linux/nvme.h b/include/linux/nvme.h
index 01aa6a6c241d..6f26c5654514 100644
--- a/include/linux/nvme.h
+++ b/include/linux/nvme.h
@@ -1392,4 +1392,7 @@ struct nvme_completion {
#define NVME_MINOR(ver) (((ver) >> 8) & 0xff)
#define NVME_TERTIARY(ver) ((ver) & 0xff)

+int nvme_submit_admin_cmd_by_bdev(struct block_device *bdev,
+ struct nvme_command *c, void *buffer, unsigned int bufflen);
+
#endif /* _LINUX_NVME_H */
--
2.17.1

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