nvmet: don't report 0-bytes in serial number
The NVME standard mandates that the SN, MN, and FR fields of the Identify Controller Data Structure be "ASCII strings". That means that they may not contain 0-bytes, not even string terminators. Signed-off-by: Martin Wilck <mwilck@suse.com> Reviewed-by: Hannes Reinecke <hare@suse.de> [hch: fixed for the move of the serial field, updated description] Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
parent
fcbc545959
commit
42de82a8b5
|
@ -168,11 +168,21 @@ out:
|
||||||
nvmet_req_complete(req, status);
|
nvmet_req_complete(req, status);
|
||||||
}
|
}
|
||||||
|
|
||||||
|
static void copy_and_pad(char *dst, int dst_len, const char *src, int src_len)
|
||||||
|
{
|
||||||
|
int len = min(src_len, dst_len);
|
||||||
|
|
||||||
|
memcpy(dst, src, len);
|
||||||
|
if (dst_len > len)
|
||||||
|
memset(dst + len, ' ', dst_len - len);
|
||||||
|
}
|
||||||
|
|
||||||
static void nvmet_execute_identify_ctrl(struct nvmet_req *req)
|
static void nvmet_execute_identify_ctrl(struct nvmet_req *req)
|
||||||
{
|
{
|
||||||
struct nvmet_ctrl *ctrl = req->sq->ctrl;
|
struct nvmet_ctrl *ctrl = req->sq->ctrl;
|
||||||
struct nvme_id_ctrl *id;
|
struct nvme_id_ctrl *id;
|
||||||
u16 status = 0;
|
u16 status = 0;
|
||||||
|
const char model[] = "Linux";
|
||||||
|
|
||||||
id = kzalloc(sizeof(*id), GFP_KERNEL);
|
id = kzalloc(sizeof(*id), GFP_KERNEL);
|
||||||
if (!id) {
|
if (!id) {
|
||||||
|
@ -184,8 +194,10 @@ static void nvmet_execute_identify_ctrl(struct nvmet_req *req)
|
||||||
id->vid = 0;
|
id->vid = 0;
|
||||||
id->ssvid = 0;
|
id->ssvid = 0;
|
||||||
|
|
||||||
memset(id->sn, ' ', sizeof(id->sn));
|
bin2hex(id->sn, &ctrl->subsys->serial,
|
||||||
snprintf(id->sn, sizeof(id->sn), "%llx", ctrl->subsys->serial);
|
min(sizeof(ctrl->subsys->serial), sizeof(id->sn) / 2));
|
||||||
|
copy_and_pad(id->mn, sizeof(id->mn), model, sizeof(model) - 1);
|
||||||
|
copy_and_pad(id->fr, sizeof(id->fr), UTS_RELEASE, strlen(UTS_RELEASE));
|
||||||
|
|
||||||
memset(id->mn, ' ', sizeof(id->mn));
|
memset(id->mn, ' ', sizeof(id->mn));
|
||||||
strncpy((char *)id->mn, "Linux", sizeof(id->mn));
|
strncpy((char *)id->mn, "Linux", sizeof(id->mn));
|
||||||
|
|
Loading…
Reference in New Issue