summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
Diffstat
-rw-r--r--drivers/nvme/host/fc.c20
-rw-r--r--drivers/nvme/target/admin-cmd.c5
-rw-r--r--drivers/nvme/target/discovery.c68
-rw-r--r--drivers/nvme/target/nvmet.h1
-rw-r--r--include/linux/nvme.h9
5 files changed, 73 insertions, 30 deletions
diff --git a/drivers/nvme/host/fc.c b/drivers/nvme/host/fc.c
index f3b9d91ba0df..6d8451356eac 100644
--- a/drivers/nvme/host/fc.c
+++ b/drivers/nvme/host/fc.c
@@ -1845,7 +1845,7 @@ nvme_fc_init_queue(struct nvme_fc_ctrl *ctrl, int idx)
memset(queue, 0, sizeof(*queue));
queue->ctrl = ctrl;
queue->qnum = idx;
- atomic_set(&queue->csn, 1);
+ atomic_set(&queue->csn, 0);
queue->dev = ctrl->dev;
if (idx > 0)
@@ -1887,7 +1887,7 @@ nvme_fc_free_queue(struct nvme_fc_queue *queue)
*/
queue->connection_id = 0;
- atomic_set(&queue->csn, 1);
+ atomic_set(&queue->csn, 0);
}
static void
@@ -2183,7 +2183,6 @@ nvme_fc_start_fcp_op(struct nvme_fc_ctrl *ctrl, struct nvme_fc_queue *queue,
{
struct nvme_fc_cmd_iu *cmdiu = &op->cmd_iu;
struct nvme_command *sqe = &cmdiu->sqe;
- u32 csn;
int ret, opstate;
/*
@@ -2198,8 +2197,6 @@ nvme_fc_start_fcp_op(struct nvme_fc_ctrl *ctrl, struct nvme_fc_queue *queue,
/* format the FC-NVME CMD IU and fcp_req */
cmdiu->connection_id = cpu_to_be64(queue->connection_id);
- csn = atomic_inc_return(&queue->csn);
- cmdiu->csn = cpu_to_be32(csn);
cmdiu->data_len = cpu_to_be32(data_len);
switch (io_dir) {
case NVMEFC_FCP_WRITE:
@@ -2257,11 +2254,24 @@ nvme_fc_start_fcp_op(struct nvme_fc_ctrl *ctrl, struct nvme_fc_queue *queue,
if (!(op->flags & FCOP_FLAGS_AEN))
blk_mq_start_request(op->rq);
+ cmdiu->csn = cpu_to_be32(atomic_inc_return(&queue->csn));
ret = ctrl->lport->ops->fcp_io(&ctrl->lport->localport,
&ctrl->rport->remoteport,
queue->lldd_handle, &op->fcp_req);
if (ret) {
+ /*
+ * If the lld fails to send the command is there an issue with
+ * the csn value? If the command that fails is the Connect,
+ * no - as the connection won't be live. If it is a command
+ * post-connect, it's possible a gap in csn may be created.
+ * Does this matter? As Linux initiators don't send fused
+ * commands, no. The gap would exist, but as there's nothing
+ * that depends on csn order to be delivered on the target
+ * side, it shouldn't hurt. It would be difficult for a
+ * target to even detect the csn gap as it has no idea when the
+ * cmd with the csn was supposed to arrive.
+ */
opstate = atomic_xchg(&op->state, FCPOP_STATE_COMPLETE);
__nvme_fc_fcpop_chk_teardowns(ctrl, op, opstate);
diff --git a/drivers/nvme/target/admin-cmd.c b/drivers/nvme/target/admin-cmd.c
index 76250181fee0..9f72d515fc4b 100644
--- a/drivers/nvme/target/admin-cmd.c
+++ b/drivers/nvme/target/admin-cmd.c
@@ -24,6 +24,11 @@ u32 nvmet_get_log_page_len(struct nvme_command *cmd)
return len;
}
+u64 nvmet_get_log_page_offset(struct nvme_command *cmd)
+{
+ return le64_to_cpu(cmd->get_log_page.lpo);
+}
+
static void nvmet_execute_get_log_page_noop(struct nvmet_req *req)
{
nvmet_req_complete(req, nvmet_zero_sgl(req, 0, req->data_len));
diff --git a/drivers/nvme/target/discovery.c b/drivers/nvme/target/discovery.c
index c872b47a88f3..33ed95e72d6b 100644
--- a/drivers/nvme/target/discovery.c
+++ b/drivers/nvme/target/discovery.c
@@ -131,54 +131,76 @@ static void nvmet_set_disc_traddr(struct nvmet_req *req, struct nvmet_port *port
memcpy(traddr, port->disc_addr.traddr, NVMF_TRADDR_SIZE);
}
+static size_t discovery_log_entries(struct nvmet_req *req)
+{
+ struct nvmet_ctrl *ctrl = req->sq->ctrl;
+ struct nvmet_subsys_link *p;
+ struct nvmet_port *r;
+ size_t entries = 0;
+
+ list_for_each_entry(p, &req->port->subsystems, entry) {
+ if (!nvmet_host_allowed(p->subsys, ctrl->hostnqn))
+ continue;
+ entries++;
+ }
+ list_for_each_entry(r, &req->port->referrals, entry)
+ entries++;
+ return entries;
+}
+
static void nvmet_execute_get_disc_log_page(struct nvmet_req *req)
{
const int entry_size = sizeof(struct nvmf_disc_rsp_page_entry);
struct nvmet_ctrl *ctrl = req->sq->ctrl;
struct nvmf_disc_rsp_page_hdr *hdr;
+ u64 offset = nvmet_get_log_page_offset(req->cmd);
size_t data_len = nvmet_get_log_page_len(req->cmd);
- size_t alloc_len = max(data_len, sizeof(*hdr));
- int residual_len = data_len - sizeof(*hdr);
+ size_t alloc_len;
struct nvmet_subsys_link *p;
struct nvmet_port *r;
u32 numrec = 0;
u16 status = 0;
+ void *buffer;
+
+ /* Spec requires dword aligned offsets */
+ if (offset & 0x3) {
+ status = NVME_SC_INVALID_FIELD | NVME_SC_DNR;
+ goto out;
+ }
/*
* Make sure we're passing at least a buffer of response header size.
* If host provided data len is less than the header size, only the
* number of bytes requested by host will be sent to host.
*/
- hdr = kzalloc(alloc_len, GFP_KERNEL);
- if (!hdr) {
+ down_read(&nvmet_config_sem);
+ alloc_len = sizeof(*hdr) + entry_size * discovery_log_entries(req);
+ buffer = kzalloc(alloc_len, GFP_KERNEL);
+ if (!buffer) {
+ up_read(&nvmet_config_sem);
status = NVME_SC_INTERNAL;
goto out;
}
- down_read(&nvmet_config_sem);
+ hdr = buffer;
list_for_each_entry(p, &req->port->subsystems, entry) {
+ char traddr[NVMF_TRADDR_SIZE];
+
if (!nvmet_host_allowed(p->subsys, ctrl->hostnqn))
continue;
- if (residual_len >= entry_size) {
- char traddr[NVMF_TRADDR_SIZE];
-
- nvmet_set_disc_traddr(req, req->port, traddr);
- nvmet_format_discovery_entry(hdr, req->port,
- p->subsys->subsysnqn, traddr,
- NVME_NQN_NVME, numrec);
- residual_len -= entry_size;
- }
+
+ nvmet_set_disc_traddr(req, req->port, traddr);
+ nvmet_format_discovery_entry(hdr, req->port,
+ p->subsys->subsysnqn, traddr,
+ NVME_NQN_NVME, numrec);
numrec++;
}
list_for_each_entry(r, &req->port->referrals, entry) {
- if (residual_len >= entry_size) {
- nvmet_format_discovery_entry(hdr, r,
- NVME_DISC_SUBSYS_NAME,
- r->disc_addr.traddr,
- NVME_NQN_DISC, numrec);
- residual_len -= entry_size;
- }
+ nvmet_format_discovery_entry(hdr, r,
+ NVME_DISC_SUBSYS_NAME,
+ r->disc_addr.traddr,
+ NVME_NQN_DISC, numrec);
numrec++;
}
@@ -190,8 +212,8 @@ static void nvmet_execute_get_disc_log_page(struct nvmet_req *req)
up_read(&nvmet_config_sem);
- status = nvmet_copy_to_sgl(req, 0, hdr, data_len);
- kfree(hdr);
+ status = nvmet_copy_to_sgl(req, 0, buffer + offset, data_len);
+ kfree(buffer);
out:
nvmet_req_complete(req, status);
}
diff --git a/drivers/nvme/target/nvmet.h b/drivers/nvme/target/nvmet.h
index 51e49efd7849..1653d19b187f 100644
--- a/drivers/nvme/target/nvmet.h
+++ b/drivers/nvme/target/nvmet.h
@@ -428,6 +428,7 @@ u16 nvmet_copy_from_sgl(struct nvmet_req *req, off_t off, void *buf,
u16 nvmet_zero_sgl(struct nvmet_req *req, off_t off, size_t len);
u32 nvmet_get_log_page_len(struct nvme_command *cmd);
+u64 nvmet_get_log_page_offset(struct nvme_command *cmd);
extern struct list_head *nvmet_ports;
void nvmet_port_disc_changed(struct nvmet_port *port,
diff --git a/include/linux/nvme.h b/include/linux/nvme.h
index baa49e6a23cc..c40720cb59ac 100644
--- a/include/linux/nvme.h
+++ b/include/linux/nvme.h
@@ -967,8 +967,13 @@ struct nvme_get_log_page_command {
__le16 numdl;
__le16 numdu;
__u16 rsvd11;
- __le32 lpol;
- __le32 lpou;
+ union {
+ struct {
+ __le32 lpol;
+ __le32 lpou;
+ };
+ __le64 lpo;
+ };
__u32 rsvd14[2];
};
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-15 07:04:51 +0000