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Diffstat (limited to 'drivers/infiniband/ulp/srp/ib_srp.c')
-rw-r--r--drivers/infiniband/ulp/srp/ib_srp.c83
1 files changed, 55 insertions, 28 deletions
diff --git a/drivers/infiniband/ulp/srp/ib_srp.c b/drivers/infiniband/ulp/srp/ib_srp.c
index 529b6bcdca7..66a908bf3fb 100644
--- a/drivers/infiniband/ulp/srp/ib_srp.c
+++ b/drivers/infiniband/ulp/srp/ib_srp.c
@@ -411,6 +411,8 @@ static void srp_path_rec_completion(int status,
static int srp_lookup_path(struct srp_target_port *target)
{
+ int ret;
+
target->path.numb_path = 1;
init_completion(&target->done);
@@ -431,7 +433,9 @@ static int srp_lookup_path(struct srp_target_port *target)
if (target->path_query_id < 0)
return target->path_query_id;
- wait_for_completion(&target->done);
+ ret = wait_for_completion_interruptible(&target->done);
+ if (ret < 0)
+ return ret;
if (target->status < 0)
shost_printk(KERN_WARNING, target->scsi_host,
@@ -710,7 +714,9 @@ static int srp_connect_target(struct srp_target_port *target)
ret = srp_send_req(target);
if (ret)
return ret;
- wait_for_completion(&target->done);
+ ret = wait_for_completion_interruptible(&target->done);
+ if (ret < 0)
+ return ret;
/*
* The CM event handling code will set status to
@@ -777,6 +783,7 @@ static void srp_unmap_data(struct scsi_cmnd *scmnd,
* srp_claim_req - Take ownership of the scmnd associated with a request.
* @target: SRP target port.
* @req: SRP request.
+ * @sdev: If not NULL, only take ownership for this SCSI device.
* @scmnd: If NULL, take ownership of @req->scmnd. If not NULL, only take
* ownership of @req->scmnd if it equals @scmnd.
*
@@ -785,16 +792,17 @@ static void srp_unmap_data(struct scsi_cmnd *scmnd,
*/
static struct scsi_cmnd *srp_claim_req(struct srp_target_port *target,
struct srp_request *req,
+ struct scsi_device *sdev,
struct scsi_cmnd *scmnd)
{
unsigned long flags;
spin_lock_irqsave(&target->lock, flags);
- if (!scmnd) {
+ if (req->scmnd &&
+ (!sdev || req->scmnd->device == sdev) &&
+ (!scmnd || req->scmnd == scmnd)) {
scmnd = req->scmnd;
req->scmnd = NULL;
- } else if (req->scmnd == scmnd) {
- req->scmnd = NULL;
} else {
scmnd = NULL;
}
@@ -821,9 +829,10 @@ static void srp_free_req(struct srp_target_port *target,
}
static void srp_finish_req(struct srp_target_port *target,
- struct srp_request *req, int result)
+ struct srp_request *req, struct scsi_device *sdev,
+ int result)
{
- struct scsi_cmnd *scmnd = srp_claim_req(target, req, NULL);
+ struct scsi_cmnd *scmnd = srp_claim_req(target, req, sdev, NULL);
if (scmnd) {
srp_free_req(target, req, scmnd, 0);
@@ -835,11 +844,20 @@ static void srp_finish_req(struct srp_target_port *target,
static void srp_terminate_io(struct srp_rport *rport)
{
struct srp_target_port *target = rport->lld_data;
+ struct Scsi_Host *shost = target->scsi_host;
+ struct scsi_device *sdev;
int i;
+ /*
+ * Invoking srp_terminate_io() while srp_queuecommand() is running
+ * is not safe. Hence the warning statement below.
+ */
+ shost_for_each_device(sdev, shost)
+ WARN_ON_ONCE(sdev->request_queue->request_fn_active);
+
for (i = 0; i < target->req_ring_size; ++i) {
struct srp_request *req = &target->req_ring[i];
- srp_finish_req(target, req, DID_TRANSPORT_FAILFAST << 16);
+ srp_finish_req(target, req, NULL, DID_TRANSPORT_FAILFAST << 16);
}
}
@@ -876,7 +894,7 @@ static int srp_rport_reconnect(struct srp_rport *rport)
for (i = 0; i < target->req_ring_size; ++i) {
struct srp_request *req = &target->req_ring[i];
- srp_finish_req(target, req, DID_RESET << 16);
+ srp_finish_req(target, req, NULL, DID_RESET << 16);
}
INIT_LIST_HEAD(&target->free_tx);
@@ -1284,7 +1302,7 @@ static void srp_process_rsp(struct srp_target_port *target, struct srp_rsp *rsp)
complete(&target->tsk_mgmt_done);
} else {
req = &target->req_ring[rsp->tag];
- scmnd = srp_claim_req(target, req, NULL);
+ scmnd = srp_claim_req(target, req, NULL, NULL);
if (!scmnd) {
shost_printk(KERN_ERR, target->scsi_host,
"Null scmnd for RSP w/tag %016llx\n",
@@ -1804,8 +1822,10 @@ static void srp_cm_rej_handler(struct ib_cm_id *cm_id,
shost_printk(KERN_WARNING, shost,
PFX "SRP_LOGIN_REJ: requested max_it_iu_len too large\n");
else
- shost_printk(KERN_WARNING, shost,
- PFX "SRP LOGIN REJECTED, reason 0x%08x\n", reason);
+ shost_printk(KERN_WARNING, shost, PFX
+ "SRP LOGIN from %pI6 to %pI6 REJECTED, reason 0x%08x\n",
+ target->path.sgid.raw,
+ target->orig_dgid, reason);
} else
shost_printk(KERN_WARNING, shost,
" REJ reason: IB_CM_REJ_CONSUMER_DEFINED,"
@@ -1863,6 +1883,7 @@ static int srp_cm_handler(struct ib_cm_id *cm_id, struct ib_cm_event *event)
case IB_CM_TIMEWAIT_EXIT:
shost_printk(KERN_ERR, target->scsi_host,
PFX "connection closed\n");
+ comp = 1;
target->status = 0;
break;
@@ -1999,7 +2020,7 @@ static int srp_abort(struct scsi_cmnd *scmnd)
shost_printk(KERN_ERR, target->scsi_host, "SRP abort called\n");
- if (!req || !srp_claim_req(target, req, scmnd))
+ if (!req || !srp_claim_req(target, req, NULL, scmnd))
return SUCCESS;
if (srp_send_tsk_mgmt(target, req->index, scmnd->device->lun,
SRP_TSK_ABORT_TASK) == 0)
@@ -2030,8 +2051,7 @@ static int srp_reset_device(struct scsi_cmnd *scmnd)
for (i = 0; i < target->req_ring_size; ++i) {
struct srp_request *req = &target->req_ring[i];
- if (req->scmnd && req->scmnd->device == scmnd->device)
- srp_finish_req(target, req, DID_RESET << 16);
+ srp_finish_req(target, req, scmnd->device, DID_RESET << 16);
}
return SUCCESS;
@@ -2612,6 +2632,8 @@ static ssize_t srp_create_target(struct device *dev,
target->tl_retry_count = 7;
target->queue_size = SRP_DEFAULT_QUEUE_SIZE;
+ mutex_lock(&host->add_target_mutex);
+
ret = srp_parse_options(buf, target);
if (ret)
goto err;
@@ -2649,16 +2671,9 @@ static ssize_t srp_create_target(struct device *dev,
if (ret)
goto err_free_mem;
- ib_query_gid(ibdev, host->port, 0, &target->path.sgid);
-
- shost_printk(KERN_DEBUG, target->scsi_host, PFX
- "new target: id_ext %016llx ioc_guid %016llx pkey %04x "
- "service_id %016llx dgid %pI6\n",
- (unsigned long long) be64_to_cpu(target->id_ext),
- (unsigned long long) be64_to_cpu(target->ioc_guid),
- be16_to_cpu(target->path.pkey),
- (unsigned long long) be64_to_cpu(target->service_id),
- target->path.dgid.raw);
+ ret = ib_query_gid(ibdev, host->port, 0, &target->path.sgid);
+ if (ret)
+ goto err_free_mem;
ret = srp_create_target_ib(target);
if (ret)
@@ -2679,7 +2694,19 @@ static ssize_t srp_create_target(struct device *dev,
if (ret)
goto err_disconnect;
- return count;
+ shost_printk(KERN_DEBUG, target->scsi_host, PFX
+ "new target: id_ext %016llx ioc_guid %016llx pkey %04x service_id %016llx sgid %pI6 dgid %pI6\n",
+ be64_to_cpu(target->id_ext),
+ be64_to_cpu(target->ioc_guid),
+ be16_to_cpu(target->path.pkey),
+ be64_to_cpu(target->service_id),
+ target->path.sgid.raw, target->path.dgid.raw);
+
+ ret = count;
+
+out:
+ mutex_unlock(&host->add_target_mutex);
+ return ret;
err_disconnect:
srp_disconnect_target(target);
@@ -2695,8 +2722,7 @@ err_free_mem:
err:
scsi_host_put(target_host);
-
- return ret;
+ goto out;
}
static DEVICE_ATTR(add_target, S_IWUSR, NULL, srp_create_target);
@@ -2732,6 +2758,7 @@ static struct srp_host *srp_add_port(struct srp_device *device, u8 port)
INIT_LIST_HEAD(&host->target_list);
spin_lock_init(&host->target_lock);
init_completion(&host->released);
+ mutex_init(&host->add_target_mutex);
host->srp_dev = device;
host->port = port;
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-25 10:11:57 +0000