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nvme: introduce nvme_execute_passthru_rq to call nvme_passthru_[start|end]() 

Introduce a new nvme_execute_passthru_rq() helper which calls
nvme_passthru_[start|end]() around blk_execute_rq(). This ensures
all passthru calls (including nvme_submit_io()) will be wrapped
appropriately.

nvme_execute_passthru_rq() will also be useful for the nvmet passthru
code and is exported in the NVME_TARGET_PASSTHRU namespace.

Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Logan Gunthorpe 2020-07-24 11:25:14 -06:00 committed by Christoph Hellwig
parent df21b6b193
commit 17365ae697
2 changed files with 16 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
drivers/nvme/host/core.c
View File

@ -1028,6 +1028,20 @@ static void nvme_passthru_end(struct nvme_ctrl *ctrl, u32 effects)
}
}
void nvme_execute_passthru_rq(struct request *rq)
{
struct nvme_command *cmd = nvme_req(rq)->cmd;
struct nvme_ctrl *ctrl = nvme_req(rq)->ctrl;
struct nvme_ns *ns = rq->q->queuedata;
struct gendisk *disk = ns ? ns->disk : NULL;
u32 effects;
effects = nvme_passthru_start(ctrl, ns, cmd->common.opcode);
blk_execute_rq(rq->q, disk, rq, 0);
nvme_passthru_end(ctrl, effects);
}
EXPORT_SYMBOL_NS_GPL(nvme_execute_passthru_rq, NVME_TARGET_PASSTHRU);
static int nvme_submit_user_cmd(struct request_queue *q,
struct nvme_command *cmd, void __user *ubuffer,
unsigned bufflen, void __user *meta_buffer, unsigned meta_len,
@ -1066,7 +1080,7 @@ static int nvme_submit_user_cmd(struct request_queue *q,
}
}
blk_execute_rq(req->q, disk, req, 0);
nvme_execute_passthru_rq(req);
if (nvme_req(req)->flags & NVME_REQ_CANCELLED)
ret = -EINTR;
else
@ -1500,7 +1514,6 @@ static int nvme_user_cmd(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
struct nvme_passthru_cmd cmd;
struct nvme_command c;
unsigned timeout = 0;
u32 effects;
u64 result;
int status;
@ -1527,12 +1540,10 @@ static int nvme_user_cmd(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
if (cmd.timeout_ms)
timeout = msecs_to_jiffies(cmd.timeout_ms);
effects = nvme_passthru_start(ctrl, ns, cmd.opcode);
status = nvme_submit_user_cmd(ns ? ns->queue : ctrl->admin_q, &c,
nvme_to_user_ptr(cmd.addr), cmd.data_len,
nvme_to_user_ptr(cmd.metadata), cmd.metadata_len,
0, &result, timeout);
nvme_passthru_end(ctrl, effects);
if (status >= 0) {
if (put_user(result, &ucmd->result))
@ -1548,7 +1559,6 @@ static int nvme_user_cmd64(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
struct nvme_passthru_cmd64 cmd;
struct nvme_command c;
unsigned timeout = 0;
u32 effects;
int status;
if (!capable(CAP_SYS_ADMIN))
@ -1574,12 +1584,10 @@ static int nvme_user_cmd64(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
if (cmd.timeout_ms)
timeout = msecs_to_jiffies(cmd.timeout_ms);
effects = nvme_passthru_start(ctrl, ns, cmd.opcode);
status = nvme_submit_user_cmd(ns ? ns->queue : ctrl->admin_q, &c,
nvme_to_user_ptr(cmd.addr), cmd.data_len,
nvme_to_user_ptr(cmd.metadata), cmd.metadata_len,
0, &cmd.result, timeout);
nvme_passthru_end(ctrl, effects);
if (status >= 0) {
if (put_user(cmd.result, &ucmd->result))

1
drivers/nvme/host/nvme.h
View File

@ -792,5 +792,6 @@ static inline void nvme_hwmon_init(struct nvme_ctrl *ctrl) { }
u32 nvme_command_effects(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
u8 opcode);
void nvme_execute_passthru_rq(struct request *rq);
#endif /* _NVME_H */