From 827fc630e4c8087df5a8e8ee013b686bd6f13736 Mon Sep 17 00:00:00 2001 From: Muneendra Kumar Date: Thu, 19 May 2022 05:31:07 -0700 Subject: scsi: nvme-fc: Add new routine nvme_fc_io_getuuid() Add nvme_fc_io_getuuid() to the nvme-fc transport. The routine is invoked by the FC LLDD on a per-I/O request basis. The routine translates from the FC-specific request structure to the bio and the cgroup structure in order to obtain the FC appid stored in the cgroup structure. If a value is not set or a bio is not found, a NULL appid (aka uuid) will be returned to the LLDD. Link: https://lore.kernel.org/r/20220519123110.17361-2-jsmart2021@gmail.com Reviewed-by: Hannes Reinecke Reviewed-by: Himanshu Madhani Acked-by: Christoph Hellwig Signed-off-by: Muneendra Kumar Signed-off-by: James Smart Signed-off-by: Martin K. Petersen --- include/linux/nvme-fc-driver.h | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'include/linux') diff --git a/include/linux/nvme-fc-driver.h b/include/linux/nvme-fc-driver.h index 5358a5facdee..fa092b9be2fd 100644 --- a/include/linux/nvme-fc-driver.h +++ b/include/linux/nvme-fc-driver.h @@ -564,6 +564,15 @@ int nvme_fc_rcv_ls_req(struct nvme_fc_remote_port *remoteport, void *lsreqbuf, u32 lsreqbuf_len); +/* + * Routine called to get the appid field associated with request by the lldd + * + * If the return value is NULL : the user/libvirt has not set the appid to VM + * If the return value is non-zero: Returns the appid associated with VM + * + * @req: IO request from nvme fc to driver + */ +char *nvme_fc_io_getuuid(struct nvmefc_fcp_req *req); /* * *************** LLDD FC-NVME Target/Subsystem API *************** @@ -1048,5 +1057,10 @@ int nvmet_fc_rcv_fcp_req(struct nvmet_fc_target_port *tgtport, void nvmet_fc_rcv_fcp_abort(struct nvmet_fc_target_port *tgtport, struct nvmefc_tgt_fcp_req *fcpreq); +/* + * add a define, visible to the compiler, that indicates support + * for feature. Allows for conditional compilation in LLDDs. + */ +#define NVME_FC_FEAT_UUID 0x0001 #endif /* _NVME_FC_DRIVER_H */ -- cgit v1.2.3-59-g8ed1b