diff options
| author | Daniel Wagner <dwagner@suse.de> | 2023-12-18 17:59:53 +0100 |
|---|---|---|
| committer | Keith Busch <kbusch@kernel.org> | 2023-12-19 09:10:08 -0800 |
| commit | a1a825ab6a60380240ca136596732fdb80bad87a (patch) | |
| tree | 25a5b61c4f66fb24f0b75208972b1e33b6f301f8 /drivers/nvme/host/nvme.h | |
| parent | 83ac678e599f0cee4056594111612946a381fa0b (diff) | |
nvme: add csi, ms and nuse to sysfs
libnvme is using the sysfs for enumarating the nvme resources. Though
there are few missing attritbutes in the sysfs. For these libnvme issues
commands during discovering.
As the kernel already knows all these attributes and we would like to
avoid libnvme to issue commands all the time, expose these missing
attributes.
The nuse value is updated on request because the nuse is a volatile
value. Since any user can read the sysfs attribute, a very simple rate
limit is added (update once every 5 seconds). A more sophisticated
update strategy can be added later if there is actually a need for it.
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Daniel Wagner <dwagner@suse.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Diffstat (limited to 'drivers/nvme/host/nvme.h')
| -rw-r--r-- | drivers/nvme/host/nvme.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h index 919115916449..6211f18c53c7 100644 --- a/drivers/nvme/host/nvme.h +++ b/drivers/nvme/host/nvme.h @@ -16,6 +16,7 @@ #include <linux/rcupdate.h> #include <linux/wait.h> #include <linux/t10-pi.h> +#include <linux/ratelimit_types.h> #include <trace/events/block.h> @@ -451,6 +452,7 @@ struct nvme_ns_head { u16 pi_size; u16 sgs; u32 sws; + u64 nuse; u8 pi_type; u8 guard_type; #ifdef CONFIG_BLK_DEV_ZONED @@ -458,6 +460,8 @@ struct nvme_ns_head { #endif unsigned long features; + struct ratelimit_state rs_nuse; + struct cdev cdev; struct device cdev_device; @@ -862,6 +866,8 @@ int nvme_ns_chr_uring_cmd(struct io_uring_cmd *ioucmd, unsigned int issue_flags); int nvme_ns_head_chr_uring_cmd(struct io_uring_cmd *ioucmd, unsigned int issue_flags); +int nvme_identify_ns(struct nvme_ctrl *ctrl, unsigned nsid, + struct nvme_id_ns **id); int nvme_getgeo(struct block_device *bdev, struct hd_geometry *geo); int nvme_dev_uring_cmd(struct io_uring_cmd *ioucmd, unsigned int issue_flags); |