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>

diff --git a/drivers/nvme/host/fabrics.c b/drivers/nvme/host/fabrics.c
index 020302c..be0b106 100644 (file)
--- a/drivers/nvme/host/fabrics.c
+++ b/drivers/nvme/host/fabrics.c
@@ -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);

diff --git a/drivers/nvme/host/fabrics.h b/drivers/nvme/host/fabrics.h
index 89df52c..46e460a 100644 (file)
--- a/drivers/nvme/host/fabrics.h
+++ b/drivers/nvme/host/fabrics.h
@@ -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;
 };
 
 /**

diff --git a/include/linux/nvme.h b/include/linux/nvme.h
index d8b37ba..7676557 100644 (file)
--- a/include/linux/nvme.h
+++ b/include/linux/nvme.h
@@ -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];