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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: Daniel Verkamp <daniel.verkamp@intel.com>
Reviewed-by: Jay Freyensee <james_p_freyensee@linux.intel.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
This commit is contained in:
Daniel Verkamp 2016-06-28 11:20:23 -07:00 committed by Sagi Grimberg
parent eadb7cf441
commit 7a665d2f60
3 changed files with 7 additions and 7 deletions
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10
drivers/nvme/host/fabrics.c
View File

@ -56,7 +56,7 @@ static struct nvmf_host *nvmf_host_add(const char *hostnqn)
kref_init(&host->ref); kref_init(&host->ref);
memcpy(host->nqn, hostnqn, NVMF_NQN_SIZE); memcpy(host->nqn, hostnqn, NVMF_NQN_SIZE);
uuid_le_gen(&host->id); uuid_be_gen(&host->id);
list_add_tail(&host->list, &nvmf_hosts); list_add_tail(&host->list, &nvmf_hosts);
out_unlock: out_unlock:
@ -73,9 +73,9 @@ static struct nvmf_host *nvmf_host_default(void)
return NULL; return NULL;
kref_init(&host->ref); kref_init(&host->ref);
uuid_le_gen(&host->id); uuid_be_gen(&host->id);
snprintf(host->nqn, NVMF_NQN_SIZE, 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); mutex_lock(&nvmf_hosts_mutex);
list_add_tail(&host->list, &nvmf_hosts); list_add_tail(&host->list, &nvmf_hosts);
@ -382,7 +382,7 @@ int nvmf_connect_admin_queue(struct nvme_ctrl *ctrl)
if (!data) if (!data)
return -ENOMEM; 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); data->cntlid = cpu_to_le16(0xffff);
strncpy(data->subsysnqn, ctrl->opts->subsysnqn, NVMF_NQN_SIZE); strncpy(data->subsysnqn, ctrl->opts->subsysnqn, NVMF_NQN_SIZE);
strncpy(data->hostnqn, ctrl->opts->host->nqn, 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) if (!data)
return -ENOMEM; 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); data->cntlid = cpu_to_le16(ctrl->cntlid);
strncpy(data->subsysnqn, ctrl->opts->subsysnqn, NVMF_NQN_SIZE); strncpy(data->subsysnqn, ctrl->opts->subsysnqn, NVMF_NQN_SIZE);
strncpy(data->hostnqn, ctrl->opts->host->nqn, NVMF_NQN_SIZE); strncpy(data->hostnqn, ctrl->opts->host->nqn, NVMF_NQN_SIZE);

2
drivers/nvme/host/fabrics.h
View File

@ -34,7 +34,7 @@ struct nvmf_host {
struct kref ref; struct kref ref;
struct list_head list; struct list_head list;
char nqn[NVMF_NQN_SIZE]; char nqn[NVMF_NQN_SIZE];
uuid_le id; uuid_be id;
}; };
/** /**

2
include/linux/nvme.h
View File

@ -794,7 +794,7 @@ struct nvmf_connect_command {
}; };
struct nvmf_connect_data { struct nvmf_connect_data {
uuid_le hostid; uuid_be hostid;
__le16 cntlid; __le16 cntlid;
char resv4[238]; char resv4[238];
char subsysnqn[NVMF_NQN_FIELD_LEN]; char subsysnqn[NVMF_NQN_FIELD_LEN];