Re: [PATCH rdma-next] RDMA/core: Annotate timeout as unsigned long

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On 10/7/2018 5:03 AM, Leon Romanovsky wrote:
From: Leon Romanovsky <leonro@xxxxxxxxxxxx>

The ucma users supply timeout in u32 format, it means that any number
with most significant bit set will be converted to negative value
by various rdma_*, cma_* and sa_query functions, which treat timeout
as int.

In the lowest level, the timeout is converted back to be unsigned long.
Remove this ambiguous conversion by updating all function signatures to
receive unsigned long.

Reported-by: Noa Osherovich <noaos@xxxxxxxxxxxx>
Signed-off-by: Leon Romanovsky <leonro@xxxxxxxxxxxx>
---
  drivers/infiniband/core/addr.c     |  5 ++---
  drivers/infiniband/core/cma.c      | 15 ++++++++-------
  drivers/infiniband/core/mad.c      |  2 +-
  drivers/infiniband/core/mad_priv.h |  2 +-
  drivers/infiniband/core/sa.h       |  8 +++-----
  drivers/infiniband/core/sa_query.c | 13 +++++++------
  include/rdma/ib_addr.h             |  5 ++---
  include/rdma/ib_cm.h               |  2 +-
  include/rdma/ib_sa.h               | 38 ++++++++++++++++----------------------
  include/rdma/rdma_cm.h             |  5 +++--
  10 files changed, 44 insertions(+), 51 deletions(-)

diff --git a/drivers/infiniband/core/addr.c b/drivers/infiniband/core/addr.c
index 07e0ffe74a8a..0dce94e3c495 100644
--- a/drivers/infiniband/core/addr.c
+++ b/drivers/infiniband/core/addr.c
@@ -659,11 +659,10 @@ static void process_one_req(struct work_struct *_work)
  }
int rdma_resolve_ip(struct sockaddr *src_addr, const struct sockaddr *dst_addr,
-		    struct rdma_dev_addr *addr, int timeout_ms,
+		    struct rdma_dev_addr *addr, unsigned long timeout_ms,
  		    void (*callback)(int status, struct sockaddr *src_addr,
  				     struct rdma_dev_addr *addr, void *context),
-		    bool resolve_by_gid_attr,
-		    void *context)
+		    bool resolve_by_gid_attr, void *context)

Doesn't seem necessary for the patch.


-static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms)
+static int cma_resolve_iw_route(struct rdma_id_private *id_priv)

Agree with the change but doesn't belong in this patch.

-int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
+int rdma_resolve_route(struct rdma_cm_id *id, unsigned long timeout_ms)
  {
  	struct rdma_id_private *id_priv;
  	int ret;
@@ -2865,7 +2866,7 @@ int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
  	else if (rdma_protocol_roce(id->device, id->port_num))
  		ret = cma_resolve_iboe_route(id_priv);
  	else if (rdma_protocol_iwarp(id->device, id->port_num))
-		ret = cma_resolve_iw_route(id_priv, timeout_ms);
+		ret = cma_resolve_iw_route(id_priv);

This goes with the comment above as well.


diff --git a/drivers/infiniband/core/sa.h b/drivers/infiniband/core/sa.h
index b1d4bbf4ce5c..cbaaaa92fff3 100644
--- a/drivers/infiniband/core/sa.h
+++ b/drivers/infiniband/core/sa.h
@@ -49,16 +49,14 @@ static inline void ib_sa_client_put(struct ib_sa_client *client)
  }
int ib_sa_mcmember_rec_query(struct ib_sa_client *client,
-			     struct ib_device *device, u8 port_num,
-			     u8 method,
+			     struct ib_device *device, u8 port_num, u8 method,

Another random clean up that changes context unnecessarily.

-			     void *context,
-			     struct ib_sa_query **sa_query);
+			     void *context, struct ib_sa_query **sa_query);

And another.


-static int send_mad(struct ib_sa_query *query, int timeout_ms, gfp_t gfp_mask)
+static int send_mad(struct ib_sa_query *query, unsigned long timeout_ms,
+		    gfp_t gfp_mask)

Should probably align with parentheses.

diff --git a/include/rdma/ib_addr.h b/include/rdma/ib_addr.h
index e09eca91eb18..2734c895c1bf 100644
--- a/include/rdma/ib_addr.h
+++ b/include/rdma/ib_addr.h
@@ -99,11 +99,10 @@ int rdma_translate_ip(const struct sockaddr *addr,
   * @context: User-specified context associated with the call.
   */
  int rdma_resolve_ip(struct sockaddr *src_addr, const struct sockaddr *dst_addr,
-		    struct rdma_dev_addr *addr, int timeout_ms,
+		    struct rdma_dev_addr *addr, unsigned long timeout_ms,
  		    void (*callback)(int status, struct sockaddr *src_addr,
  				     struct rdma_dev_addr *addr, void *context),
-		    bool resolve_by_gid_attr,
-		    void *context);
+		    bool resolve_by_gid_attr, void *context);

Unrelated.


diff --git a/include/rdma/ib_sa.h b/include/rdma/ib_sa.h
index b6ddf2a1b9d8..19520979b84c 100644
--- a/include/rdma/ib_sa.h
+++ b/include/rdma/ib_sa.h
@@ -449,28 +449,23 @@ struct ib_sa_query;
void ib_sa_cancel_query(int id, struct ib_sa_query *query); -int ib_sa_path_rec_get(struct ib_sa_client *client,
-		       struct ib_device *device, u8 port_num,
-		       struct sa_path_rec *rec,
-		       ib_sa_comp_mask comp_mask,
-		       int timeout_ms, gfp_t gfp_mask,
-		       void (*callback)(int status,
-					struct sa_path_rec *resp,
+int ib_sa_path_rec_get(struct ib_sa_client *client, struct ib_device *device,
+		       u8 port_num, struct sa_path_rec *rec,
+		       ib_sa_comp_mask comp_mask, unsigned long timeout_ms,
+		       gfp_t gfp_mask,
+		       void (*callback)(int status, struct sa_path_rec *resp,
  					void *context),
-		       void *context,
-		       struct ib_sa_query **query);
+		       void *context, struct ib_sa_query **query);
int ib_sa_service_rec_query(struct ib_sa_client *client,
-			 struct ib_device *device, u8 port_num,
-			 u8 method,
-			 struct ib_sa_service_rec *rec,
-			 ib_sa_comp_mask comp_mask,
-			 int timeout_ms, gfp_t gfp_mask,
-			 void (*callback)(int status,
-					  struct ib_sa_service_rec *resp,
-					  void *context),
-			 void *context,
-			 struct ib_sa_query **sa_query);
+			    struct ib_device *device, u8 port_num, u8 method,
+			    struct ib_sa_service_rec *rec,
+			    ib_sa_comp_mask comp_mask, unsigned long timeout_ms,
+			    gfp_t gfp_mask,
+			    void (*callback)(int status,
+					     struct ib_sa_service_rec *resp,
+					     void *context),
+			    void *context, struct ib_sa_query **sa_query);

Again more complicated than just annotating with unsigned long.


  struct ib_sa_multicast {
  	struct ib_sa_mcmember_rec rec;
@@ -573,12 +568,11 @@ int ib_sa_guid_info_rec_query(struct ib_sa_client *client,
  			      struct ib_device *device, u8 port_num,
  			      struct ib_sa_guidinfo_rec *rec,
  			      ib_sa_comp_mask comp_mask, u8 method,
-			      int timeout_ms, gfp_t gfp_mask,
+			      unsigned long timeout_ms, gfp_t gfp_mask,
  			      void (*callback)(int status,
  					       struct ib_sa_guidinfo_rec *resp,
  					       void *context),
-			      void *context,
-			      struct ib_sa_query **sa_query);
+			      void *context, struct ib_sa_query **sa_query);

Another one.

Overall, while I agree with the changes, there are a number here which are not germane to the patch. Why not submit the clean-ups separately?

-Denny



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