diff options
| author | Christoph Hellwig <hch@lst.de> | 2024-07-05 18:46:26 +0200 |
|---|---|---|
| committer | Keith Busch <kbusch@kernel.org> | 2024-07-08 10:25:39 -0700 |
| commit | 18f03a063d41a90115373dc41c1fc22bd3e0a6ad (patch) | |
| tree | 7d939680d3b23ec85a4d1128c570350ef3bed96c | |
| parent | f227345f0a70f011647ae7ae12778bf258ff71f2 (diff) | |
nvme: implement ->get_unique_id
Implement the get_unique_id method to allow pNFS SCSI layout access to
NVMe namespaces.
This is the server side implementation of RFC 9561 "Using the Parallel
NFS (pNFS) SCSI Layout to Access Non-Volatile Memory Express (NVMe)
Storage Devices".
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Keith Busch <kbusch@kernel.org>
| -rw-r--r-- | drivers/nvme/host/core.c | 27 | ||||
| -rw-r--r-- | drivers/nvme/host/multipath.c | 16 | ||||
| -rw-r--r-- | drivers/nvme/host/nvme.h | 3 |
3 files changed, 46 insertions, 0 deletions
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index 20e7505852ce..bfea6cccbc0a 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -2285,6 +2285,32 @@ static int nvme_update_ns_info(struct nvme_ns *ns, struct nvme_ns_info *info) return ret; } +int nvme_ns_get_unique_id(struct nvme_ns *ns, u8 id[16], + enum blk_unique_id type) +{ + struct nvme_ns_ids *ids = &ns->head->ids; + + if (type != BLK_UID_EUI64) + return -EINVAL; + + if (memchr_inv(ids->nguid, 0, sizeof(ids->nguid))) { + memcpy(id, &ids->nguid, sizeof(ids->nguid)); + return sizeof(ids->nguid); + } + if (memchr_inv(ids->eui64, 0, sizeof(ids->eui64))) { + memcpy(id, &ids->eui64, sizeof(ids->eui64)); + return sizeof(ids->eui64); + } + + return -EINVAL; +} + +static int nvme_get_unique_id(struct gendisk *disk, u8 id[16], + enum blk_unique_id type) +{ + return nvme_ns_get_unique_id(disk->private_data, id, type); +} + #ifdef CONFIG_BLK_SED_OPAL static int nvme_sec_submit(void *data, u16 spsp, u8 secp, void *buffer, size_t len, bool send) @@ -2340,6 +2366,7 @@ const struct block_device_operations nvme_bdev_ops = { .open = nvme_open, .release = nvme_release, .getgeo = nvme_getgeo, + .get_unique_id = nvme_get_unique_id, .report_zones = nvme_report_zones, .pr_ops = &nvme_pr_ops, }; diff --git a/drivers/nvme/host/multipath.c b/drivers/nvme/host/multipath.c index d8f3c1fb2ce5..91d9eb3c22ef 100644 --- a/drivers/nvme/host/multipath.c +++ b/drivers/nvme/host/multipath.c @@ -488,6 +488,21 @@ static void nvme_ns_head_release(struct gendisk *disk) nvme_put_ns_head(disk->private_data); } +static int nvme_ns_head_get_unique_id(struct gendisk *disk, u8 id[16], + enum blk_unique_id type) +{ + struct nvme_ns_head *head = disk->private_data; + struct nvme_ns *ns; + int srcu_idx, ret = -EWOULDBLOCK; + + srcu_idx = srcu_read_lock(&head->srcu); + ns = nvme_find_path(head); + if (ns) + ret = nvme_ns_get_unique_id(ns, id, type); + srcu_read_unlock(&head->srcu, srcu_idx); + return ret; +} + #ifdef CONFIG_BLK_DEV_ZONED static int nvme_ns_head_report_zones(struct gendisk *disk, sector_t sector, unsigned int nr_zones, report_zones_cb cb, void *data) @@ -515,6 +530,7 @@ const struct block_device_operations nvme_ns_head_ops = { .ioctl = nvme_ns_head_ioctl, .compat_ioctl = blkdev_compat_ptr_ioctl, .getgeo = nvme_getgeo, + .get_unique_id = nvme_ns_head_get_unique_id, .report_zones = nvme_ns_head_report_zones, .pr_ops = &nvme_pr_ops, }; diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h index b512012b7044..9ac587e64166 100644 --- a/drivers/nvme/host/nvme.h +++ b/drivers/nvme/host/nvme.h @@ -1059,6 +1059,9 @@ static inline bool nvme_disk_is_ns_head(struct gendisk *disk) } #endif /* CONFIG_NVME_MULTIPATH */ +int nvme_ns_get_unique_id(struct nvme_ns *ns, u8 id[16], + enum blk_unique_id type); + struct nvme_zone_info { u64 zone_size; unsigned int max_open_zones; |