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| author | Israel Rukshin <israelr@mellanox.com> | 2020-05-19 17:06:01 +0300 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2020-05-27 08:12:40 +0300 |
| commit | ea52ac1c6605fbd25347fabf46233e260dd92eb2 (patch) | |
| tree | 0a8913baad0cbf3cc2a5c056cb437afe711961f4 /drivers/nvme/target/nvmet.h | |
| parent | 39481fbd14ee272edd419d73a98bc637e2a3fd35 (diff) | |
| download | linux-ea52ac1c6605fbd25347fabf46233e260dd92eb2.tar.xz | |
nvmet: add metadata/T10-PI support
Expose the namespace metadata format when PI is enabled. The user needs
to enable the capability per subsystem and per port. The other metadata
properties are taken from the namespace/bdev.
Usage example:
echo 1 > /config/nvmet/subsystems/${NAME}/attr_pi_enable
echo 1 > /config/nvmet/ports/${PORT_NUM}/param_pi_enable
Signed-off-by: Israel Rukshin <israelr@mellanox.com>
Signed-off-by: Max Gurtovoy <maxg@mellanox.com>
Reviewed-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'drivers/nvme/target/nvmet.h')
| -rw-r--r-- | drivers/nvme/target/nvmet.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/nvme/target/nvmet.h b/drivers/nvme/target/nvmet.h index 29ab0b96bd32..46b5d2b4ca0a 100644 --- a/drivers/nvme/target/nvmet.h +++ b/drivers/nvme/target/nvmet.h @@ -145,6 +145,7 @@ struct nvmet_port { bool enabled; int inline_data_size; const struct nvmet_fabrics_ops *tr_ops; + bool pi_enable; }; static inline struct nvmet_port *to_nvmet_port(struct config_item *item) @@ -204,6 +205,7 @@ struct nvmet_ctrl { spinlock_t error_lock; u64 err_counter; struct nvme_error_slot slots[NVMET_ERROR_LOG_SLOTS]; + bool pi_support; }; struct nvmet_subsys_model { @@ -233,6 +235,7 @@ struct nvmet_subsys { u64 ver; u64 serial; char *subsysnqn; + bool pi_support; struct config_group group; @@ -284,6 +287,7 @@ struct nvmet_fabrics_ops { unsigned int type; unsigned int msdbd; bool has_keyed_sgls : 1; + bool metadata_support : 1; void (*queue_response)(struct nvmet_req *req); int (*add_port)(struct nvmet_port *port); void (*remove_port)(struct nvmet_port *port); @@ -511,6 +515,14 @@ static inline u32 nvmet_rw_data_len(struct nvmet_req *req) req->ns->blksize_shift; } +static inline u32 nvmet_rw_metadata_len(struct nvmet_req *req) +{ + if (!IS_ENABLED(CONFIG_BLK_DEV_INTEGRITY)) + return 0; + return ((u32)le16_to_cpu(req->cmd->rw.length) + 1) * + req->ns->metadata_size; +} + static inline u32 nvmet_dsm_len(struct nvmet_req *req) { return (le32_to_cpu(req->cmd->dsm.nr) + 1) * @@ -525,4 +537,11 @@ static inline __le16 to0based(u32 a) return cpu_to_le16(max(1U, min(1U << 16, a)) - 1); } +static inline bool nvmet_ns_has_pi(struct nvmet_ns *ns) +{ + if (!IS_ENABLED(CONFIG_BLK_DEV_INTEGRITY)) + return false; + return ns->pi_type && ns->metadata_size == sizeof(struct t10_pi_tuple); +} + #endif /* _NVMET_H */ |