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Commit 7a665d2f authored by Daniel Verkamp's avatar Daniel Verkamp Committed by Sagi Grimberg
Browse files

nvme-fabrics: change NQN UUID to big-endian format 



NVM Express 1.2.1 section 7.9, NVMe Qualified Names, specifies that the
UUID format of NQN uses a UUID based on RFC 4122.

RFC 4122 specifies that the UUID is encoded in big-endian byte order.

Switch the NVMe over Fabrics host ID field from little-endian UUID to
big-endian UUID to match the specification.

Signed-off-by: default avatarDaniel Verkamp <daniel.verkamp@intel.com>
Reviewed-by: default avatarJay Freyensee <james_p_freyensee@linux.intel.com>
Signed-off-by: default avatarSagi Grimberg <sagi@grimberg.me>
parent eadb7cf4

drivers/nvme/host/fabrics.c

+5 −5
Original line number Diff line number Diff line
@@ -56,7 +56,7 @@ static struct nvmf_host *nvmf_host_add(const char *hostnqn) 


	kref_init(&host->ref);

	memcpy(host->nqn, hostnqn, NVMF_NQN_SIZE);

	uuid_le_gen(&host->id);

	uuid_be_gen(&host->id);



	list_add_tail(&host->list, &nvmf_hosts);

out_unlock:
@@ -73,9 +73,9 @@ static struct nvmf_host *nvmf_host_default(void) 
		return NULL;



	kref_init(&host->ref);

	uuid_le_gen(&host->id);

	uuid_be_gen(&host->id);

	snprintf(host->nqn, NVMF_NQN_SIZE,

		"nqn.2014-08.org.nvmexpress:NVMf:uuid:%pUl", &host->id);

		"nqn.2014-08.org.nvmexpress:NVMf:uuid:%pUb", &host->id);



	mutex_lock(&nvmf_hosts_mutex);

	list_add_tail(&host->list, &nvmf_hosts);
@@ -382,7 +382,7 @@ int nvmf_connect_admin_queue(struct nvme_ctrl *ctrl) 
	if (!data)

		return -ENOMEM;



	memcpy(&data->hostid, &ctrl->opts->host->id, sizeof(uuid_le));

	memcpy(&data->hostid, &ctrl->opts->host->id, sizeof(uuid_be));

	data->cntlid = cpu_to_le16(0xffff);

	strncpy(data->subsysnqn, ctrl->opts->subsysnqn, NVMF_NQN_SIZE);

	strncpy(data->hostnqn, ctrl->opts->host->nqn, NVMF_NQN_SIZE);
@@ -441,7 +441,7 @@ int nvmf_connect_io_queue(struct nvme_ctrl *ctrl, u16 qid) 
	if (!data)

		return -ENOMEM;



	memcpy(&data->hostid, &ctrl->opts->host->id, sizeof(uuid_le));

	memcpy(&data->hostid, &ctrl->opts->host->id, sizeof(uuid_be));

	data->cntlid = cpu_to_le16(ctrl->cntlid);

	strncpy(data->subsysnqn, ctrl->opts->subsysnqn, NVMF_NQN_SIZE);

	strncpy(data->hostnqn, ctrl->opts->host->nqn, NVMF_NQN_SIZE);

drivers/nvme/host/fabrics.h

+1 −1
Original line number Diff line number Diff line
@@ -34,7 +34,7 @@ struct nvmf_host { 
	struct kref		ref;

	struct list_head	list;

	char			nqn[NVMF_NQN_SIZE];

	uuid_le			id;

	uuid_be			id;

};



/**

include/linux/nvme.h

+1 −1
Original line number Diff line number Diff line
@@ -794,7 +794,7 @@ struct nvmf_connect_command { 
};



struct nvmf_connect_data {

	uuid_le		hostid;

	uuid_be		hostid;

	__le16		cntlid;

	char		resv4[238];

	char		subsysnqn[NVMF_NQN_FIELD_LEN];