From: Christof Schmitt <christof.schmitt@xxxxxxxxxx>
Allocate the data for the GID_PN request through the new FC
kmem_cache. While updating the GID_PN code, also introduce a helper
function for initializing the CT header for FC nameserver requests.
Remove the "paranoia" check as well, the GID_PN request data does not
suddenly change.
Signed-off-by: Christof Schmitt <christof.schmitt@xxxxxxxxxx>
Signed-off-by: Steffen Maier <maier@xxxxxxxxxxxxxxxxxx>
---
drivers/s390/scsi/zfcp_aux.c | 10 -----
drivers/s390/scsi/zfcp_def.h | 1
drivers/s390/scsi/zfcp_fc.c | 78 ++++++++++++++++++++-----------------------
drivers/s390/scsi/zfcp_fc.h | 25 +++----------
4 files changed, 45 insertions(+), 69 deletions(-)
--- a/drivers/s390/scsi/zfcp_aux.c
+++ b/drivers/s390/scsi/zfcp_aux.c
@@ -132,11 +132,6 @@ static int __init zfcp_module_init(void)
if (!zfcp_data.qtcb_cache)
goto out_qtcb_cache;
- zfcp_data.gid_pn_cache = zfcp_cache_hw_align("zfcp_gid",
- sizeof(struct zfcp_fc_gid_pn));
- if (!zfcp_data.gid_pn_cache)
- goto out_gid_cache;
-
zfcp_fc_req_cache = zfcp_cache_hw_align("zfcp_fc_req",
sizeof(struct zfcp_fc_req));
if (!zfcp_fc_req_cache)
@@ -174,8 +169,6 @@ out_misc:
out_transport:
kmem_cache_destroy(zfcp_fc_req_cache);
out_fc_cache:
- kmem_cache_destroy(zfcp_data.gid_pn_cache);
-out_gid_cache:
kmem_cache_destroy(zfcp_data.qtcb_cache);
out_qtcb_cache:
kmem_cache_destroy(zfcp_data.gpn_ft_cache);
@@ -191,7 +184,6 @@ static void __exit zfcp_module_exit(void
misc_deregister(&zfcp_cfdc_misc);
fc_release_transport(zfcp_data.scsi_transport_template);
kmem_cache_destroy(zfcp_fc_req_cache);
- kmem_cache_destroy(zfcp_data.gid_pn_cache);
kmem_cache_destroy(zfcp_data.qtcb_cache);
kmem_cache_destroy(zfcp_data.gpn_ft_cache);
}
@@ -263,7 +255,7 @@ static int zfcp_allocate_low_mem_buffers
return -ENOMEM;
adapter->pool.gid_pn =
- mempool_create_slab_pool(1, zfcp_data.gid_pn_cache);
+ mempool_create_slab_pool(1, zfcp_fc_req_cache);
if (!adapter->pool.gid_pn)
return -ENOMEM;
--- a/drivers/s390/scsi/zfcp_def.h
+++ b/drivers/s390/scsi/zfcp_def.h
@@ -319,7 +319,6 @@ struct zfcp_data {
struct scsi_transport_template *scsi_transport_template;
struct kmem_cache *gpn_ft_cache;
struct kmem_cache *qtcb_cache;
- struct kmem_cache *gid_pn_cache;
};
#endif /* ZFCP_DEF_H */
--- a/drivers/s390/scsi/zfcp_fc.c
+++ b/drivers/s390/scsi/zfcp_fc.c
@@ -262,24 +262,18 @@ void zfcp_fc_incoming_els(struct zfcp_fs
zfcp_fc_incoming_rscn(fsf_req);
}
-static void zfcp_fc_ns_gid_pn_eval(void *data)
+static void zfcp_fc_ns_gid_pn_eval(struct zfcp_fc_req *fc_req)
{
- struct zfcp_fc_gid_pn *gid_pn = data;
- struct zfcp_fsf_ct_els *ct = &gid_pn->ct;
- struct zfcp_fc_gid_pn_req *gid_pn_req = sg_virt(ct->req);
- struct zfcp_fc_gid_pn_resp *gid_pn_resp = sg_virt(ct->resp);
- struct zfcp_port *port = gid_pn->port;
+ struct zfcp_fsf_ct_els *ct_els = &fc_req->ct_els;
+ struct zfcp_fc_gid_pn_rsp *gid_pn_rsp = &fc_req->u.gid_pn.rsp;
- if (ct->status)
+ if (ct_els->status)
return;
- if (gid_pn_resp->ct_hdr.ct_cmd != FC_FS_ACC)
+ if (gid_pn_rsp->ct_hdr.ct_cmd != FC_FS_ACC)
return;
- /* paranoia */
- if (gid_pn_req->gid_pn.fn_wwpn != port->wwpn)
- return;
/* looks like a valid d_id */
- port->d_id = ntoh24(gid_pn_resp->gid_pn.fp_fid);
+ ct_els->port->d_id = ntoh24(gid_pn_rsp->gid_pn.fp_fid);
}
static void zfcp_fc_complete(void *data)
@@ -287,69 +281,73 @@ static void zfcp_fc_complete(void *data)
complete(data);
}
+static void zfcp_fc_ct_ns_init(struct fc_ct_hdr *ct_hdr, u16 cmd, u16 mr_size)
+{
+ ct_hdr->ct_rev = FC_CT_REV;
+ ct_hdr->ct_fs_type = FC_FST_DIR;
+ ct_hdr->ct_fs_subtype = FC_NS_SUBTYPE;
+ ct_hdr->ct_cmd = cmd;
+ ct_hdr->ct_mr_size = mr_size / 4;
+}
+
static int zfcp_fc_ns_gid_pn_request(struct zfcp_port *port,
- struct zfcp_fc_gid_pn *gid_pn)
+ struct zfcp_fc_req *fc_req)
{
struct zfcp_adapter *adapter = port->adapter;
DECLARE_COMPLETION_ONSTACK(completion);
+ struct zfcp_fc_gid_pn_req *gid_pn_req = &fc_req->u.gid_pn.req;
+ struct zfcp_fc_gid_pn_rsp *gid_pn_rsp = &fc_req->u.gid_pn.rsp;
int ret;
/* setup parameters for send generic command */
- gid_pn->port = port;
- gid_pn->ct.handler = zfcp_fc_complete;
- gid_pn->ct.handler_data = &completion;
- gid_pn->ct.req = &gid_pn->sg_req;
- gid_pn->ct.resp = &gid_pn->sg_resp;
- sg_init_one(&gid_pn->sg_req, &gid_pn->gid_pn_req,
- sizeof(struct zfcp_fc_gid_pn_req));
- sg_init_one(&gid_pn->sg_resp, &gid_pn->gid_pn_resp,
- sizeof(struct zfcp_fc_gid_pn_resp));
-
- /* setup nameserver request */
- gid_pn->gid_pn_req.ct_hdr.ct_rev = FC_CT_REV;
- gid_pn->gid_pn_req.ct_hdr.ct_fs_type = FC_FST_DIR;
- gid_pn->gid_pn_req.ct_hdr.ct_fs_subtype = FC_NS_SUBTYPE;
- gid_pn->gid_pn_req.ct_hdr.ct_options = 0;
- gid_pn->gid_pn_req.ct_hdr.ct_cmd = FC_NS_GID_PN;
- gid_pn->gid_pn_req.ct_hdr.ct_mr_size = ZFCP_FC_CT_SIZE_PAGE / 4;
- gid_pn->gid_pn_req.gid_pn.fn_wwpn = port->wwpn;
+ fc_req->ct_els.port = port;
+ fc_req->ct_els.handler = zfcp_fc_complete;
+ fc_req->ct_els.handler_data = &completion;
+ fc_req->ct_els.req = &fc_req->sg_req;
+ fc_req->ct_els.resp = &fc_req->sg_rsp;
+ sg_init_one(&fc_req->sg_req, gid_pn_req, sizeof(*gid_pn_req));
+ sg_init_one(&fc_req->sg_rsp, gid_pn_rsp, sizeof(*gid_pn_rsp));
+
+ zfcp_fc_ct_ns_init(&gid_pn_req->ct_hdr,
+ FC_NS_GID_PN, ZFCP_FC_CT_SIZE_PAGE);
+ gid_pn_req->gid_pn.fn_wwpn = port->wwpn;
- ret = zfcp_fsf_send_ct(&adapter->gs->ds, &gid_pn->ct,
+ ret = zfcp_fsf_send_ct(&adapter->gs->ds, &fc_req->ct_els,
adapter->pool.gid_pn_req,
ZFCP_FC_CTELS_TMO);
if (!ret) {
wait_for_completion(&completion);
- zfcp_fc_ns_gid_pn_eval(gid_pn);
+ zfcp_fc_ns_gid_pn_eval(fc_req);
}
return ret;
}
/**
- * zfcp_fc_ns_gid_pn_request - initiate GID_PN nameserver request
+ * zfcp_fc_ns_gid_pn - initiate GID_PN nameserver request
* @port: port where GID_PN request is needed
* return: -ENOMEM on error, 0 otherwise
*/
static int zfcp_fc_ns_gid_pn(struct zfcp_port *port)
{
int ret;
- struct zfcp_fc_gid_pn *gid_pn;
+ struct zfcp_fc_req *fc_req;
struct zfcp_adapter *adapter = port->adapter;
- gid_pn = mempool_alloc(adapter->pool.gid_pn, GFP_ATOMIC);
- if (!gid_pn)
+ fc_req = mempool_alloc(adapter->pool.gid_pn, GFP_ATOMIC);
+ if (!fc_req)
return -ENOMEM;
- memset(gid_pn, 0, sizeof(*gid_pn));
+ memset(fc_req, 0, sizeof(*fc_req));
ret = zfcp_fc_wka_port_get(&adapter->gs->ds);
if (ret)
goto out;
- ret = zfcp_fc_ns_gid_pn_request(port, gid_pn);
+ ret = zfcp_fc_ns_gid_pn_request(port, fc_req);
zfcp_fc_wka_port_put(&adapter->gs->ds);
out:
- mempool_free(gid_pn, adapter->pool.gid_pn);
+ mempool_free(fc_req, adapter->pool.gid_pn);
return ret;
}
--- a/drivers/s390/scsi/zfcp_fc.h
+++ b/drivers/s390/scsi/zfcp_fc.h
@@ -64,33 +64,16 @@ struct zfcp_fc_gid_pn_req {
} __packed;
/**
- * struct zfcp_fc_gid_pn_resp - container for ct header plus gid_pn response
+ * struct zfcp_fc_gid_pn_rsp - container for ct header plus gid_pn response
* @ct_hdr: FC GS common transport header
* @gid_pn: GID_PN response
*/
-struct zfcp_fc_gid_pn_resp {
+struct zfcp_fc_gid_pn_rsp {
struct fc_ct_hdr ct_hdr;
struct fc_gid_pn_resp gid_pn;
} __packed;
/**
- * struct zfcp_fc_gid_pn - everything required in zfcp for gid_pn request
- * @ct: data passed to zfcp_fsf for issuing fsf request
- * @sg_req: scatterlist entry for request data
- * @sg_resp: scatterlist entry for response data
- * @gid_pn_req: GID_PN request data
- * @gid_pn_resp: GID_PN response data
- */
-struct zfcp_fc_gid_pn {
- struct zfcp_fsf_ct_els ct;
- struct scatterlist sg_req;
- struct scatterlist sg_resp;
- struct zfcp_fc_gid_pn_req gid_pn_req;
- struct zfcp_fc_gid_pn_resp gid_pn_resp;
- struct zfcp_port *port;
-};
-
-/**
* struct zfcp_fc_gpn_ft - container for ct header plus gpn_ft request
* @ct_hdr: FC GS common transport header
* @gpn_ft: GPN_FT request
@@ -138,6 +121,10 @@ struct zfcp_fc_req {
struct fc_els_adisc req;
struct fc_els_adisc rsp;
} adisc;
+ struct {
+ struct zfcp_fc_gid_pn_req req;
+ struct zfcp_fc_gid_pn_rsp rsp;
+ } gid_pn;
} u;
};
--
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