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From: Bob Pearson <rpearsonhpe@gmail.com>
To: jgg@nvidia.com, zyjzyj2000@gmail.com, monis@mellanox.com,
	linux-rdma@vger.kernel.org
Cc: Bob Pearson <rpearsonhpe@gmail.com>
Subject: [PATCH for-next v9 02/10] RDMA/rxe: Return errors for add index and key
Date: Mon,  7 Jun 2021 23:25:45 -0500	[thread overview]
Message-ID: <20210608042552.33275-3-rpearsonhpe@gmail.com> (raw)
In-Reply-To: <20210608042552.33275-1-rpearsonhpe@gmail.com>

Modify rxe_add_index() and rxe_add_key() to return an error if the index
or key is aleady present in the pool.  Currently they print a warning
and silently fail with bad consequences to the caller.

Signed-off-by: Bob Pearson <rpearsonhpe@gmail.com>
---
 drivers/infiniband/sw/rxe/rxe_pool.c | 44 ++++++++++++++++++----------
 drivers/infiniband/sw/rxe/rxe_pool.h |  8 ++---
 2 files changed, 32 insertions(+), 20 deletions(-)

diff --git a/drivers/infiniband/sw/rxe/rxe_pool.c b/drivers/infiniband/sw/rxe/rxe_pool.c
index d24901f2af3f..df0bec719341 100644
--- a/drivers/infiniband/sw/rxe/rxe_pool.c
+++ b/drivers/infiniband/sw/rxe/rxe_pool.c
@@ -183,7 +183,7 @@ static u32 alloc_index(struct rxe_pool *pool)
 	return index + pool->index.min_index;
 }
 
-static void insert_index(struct rxe_pool *pool, struct rxe_pool_entry *new)
+static int rxe_insert_index(struct rxe_pool *pool, struct rxe_pool_entry *new)
 {
 	struct rb_node **link = &pool->index.tree.rb_node;
 	struct rb_node *parent = NULL;
@@ -195,7 +195,7 @@ static void insert_index(struct rxe_pool *pool, struct rxe_pool_entry *new)
 
 		if (elem->index == new->index) {
 			pr_warn("element already exists!\n");
-			goto out;
+			return -EINVAL;
 		}
 
 		if (elem->index > new->index)
@@ -206,11 +206,11 @@ static void insert_index(struct rxe_pool *pool, struct rxe_pool_entry *new)
 
 	rb_link_node(&new->index_node, parent, link);
 	rb_insert_color(&new->index_node, &pool->index.tree);
-out:
-	return;
+
+	return 0;
 }
 
-static void insert_key(struct rxe_pool *pool, struct rxe_pool_entry *new)
+static int rxe_insert_key(struct rxe_pool *pool, struct rxe_pool_entry *new)
 {
 	struct rb_node **link = &pool->key.tree.rb_node;
 	struct rb_node *parent = NULL;
@@ -226,7 +226,7 @@ static void insert_key(struct rxe_pool *pool, struct rxe_pool_entry *new)
 
 		if (cmp == 0) {
 			pr_warn("key already exists!\n");
-			goto out;
+			return -EINVAL;
 		}
 
 		if (cmp > 0)
@@ -237,26 +237,32 @@ static void insert_key(struct rxe_pool *pool, struct rxe_pool_entry *new)
 
 	rb_link_node(&new->key_node, parent, link);
 	rb_insert_color(&new->key_node, &pool->key.tree);
-out:
-	return;
+
+	return 0;
 }
 
-void __rxe_add_key_locked(struct rxe_pool_entry *elem, void *key)
+int __rxe_add_key_locked(struct rxe_pool_entry *elem, void *key)
 {
 	struct rxe_pool *pool = elem->pool;
+	int err;
 
 	memcpy((u8 *)elem + pool->key.key_offset, key, pool->key.key_size);
-	insert_key(pool, elem);
+	err = rxe_insert_key(pool, elem);
+
+	return err;
 }
 
-void __rxe_add_key(struct rxe_pool_entry *elem, void *key)
+int __rxe_add_key(struct rxe_pool_entry *elem, void *key)
 {
 	struct rxe_pool *pool = elem->pool;
 	unsigned long flags;
+	int err;
 
 	write_lock_irqsave(&pool->pool_lock, flags);
-	__rxe_add_key_locked(elem, key);
+	err = __rxe_add_key_locked(elem, key);
 	write_unlock_irqrestore(&pool->pool_lock, flags);
+
+	return err;
 }
 
 void __rxe_drop_key_locked(struct rxe_pool_entry *elem)
@@ -276,22 +282,28 @@ void __rxe_drop_key(struct rxe_pool_entry *elem)
 	write_unlock_irqrestore(&pool->pool_lock, flags);
 }
 
-void __rxe_add_index_locked(struct rxe_pool_entry *elem)
+int __rxe_add_index_locked(struct rxe_pool_entry *elem)
 {
 	struct rxe_pool *pool = elem->pool;
+	int err;
 
 	elem->index = alloc_index(pool);
-	insert_index(pool, elem);
+	err = rxe_insert_index(pool, elem);
+
+	return err;
 }
 
-void __rxe_add_index(struct rxe_pool_entry *elem)
+int __rxe_add_index(struct rxe_pool_entry *elem)
 {
 	struct rxe_pool *pool = elem->pool;
 	unsigned long flags;
+	int err;
 
 	write_lock_irqsave(&pool->pool_lock, flags);
-	__rxe_add_index_locked(elem);
+	err = __rxe_add_index_locked(elem);
 	write_unlock_irqrestore(&pool->pool_lock, flags);
+
+	return err;
 }
 
 void __rxe_drop_index_locked(struct rxe_pool_entry *elem)
diff --git a/drivers/infiniband/sw/rxe/rxe_pool.h b/drivers/infiniband/sw/rxe/rxe_pool.h
index 61210b300a78..1feca1bffced 100644
--- a/drivers/infiniband/sw/rxe/rxe_pool.h
+++ b/drivers/infiniband/sw/rxe/rxe_pool.h
@@ -111,11 +111,11 @@ int __rxe_add_to_pool(struct rxe_pool *pool, struct rxe_pool_entry *elem);
 /* assign an index to an indexed object and insert object into
  *  pool's rb tree holding and not holding the pool_lock
  */
-void __rxe_add_index_locked(struct rxe_pool_entry *elem);
+int __rxe_add_index_locked(struct rxe_pool_entry *elem);
 
 #define rxe_add_index_locked(obj) __rxe_add_index_locked(&(obj)->pelem)
 
-void __rxe_add_index(struct rxe_pool_entry *elem);
+int __rxe_add_index(struct rxe_pool_entry *elem);
 
 #define rxe_add_index(obj) __rxe_add_index(&(obj)->pelem)
 
@@ -133,11 +133,11 @@ void __rxe_drop_index(struct rxe_pool_entry *elem);
 /* assign a key to a keyed object and insert object into
  * pool's rb tree holding and not holding pool_lock
  */
-void __rxe_add_key_locked(struct rxe_pool_entry *elem, void *key);
+int __rxe_add_key_locked(struct rxe_pool_entry *elem, void *key);
 
 #define rxe_add_key_locked(obj, key) __rxe_add_key_locked(&(obj)->pelem, key)
 
-void __rxe_add_key(struct rxe_pool_entry *elem, void *key);
+int __rxe_add_key(struct rxe_pool_entry *elem, void *key);
 
 #define rxe_add_key(obj, key) __rxe_add_key(&(obj)->pelem, key)
 
-- 
2.30.2


  parent reply	other threads:[~2021-06-08  4:27 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-08  4:25 [PATCH for-next v9 00/10] RDMA/rxe: Implement memory windows Bob Pearson
2021-06-08  4:25 ` [PATCH for-next v9 1/9] RDMA/rxe: Add bind MW fields to rxe_send_wr Bob Pearson
2021-06-08  4:25 ` Bob Pearson [this message]
2021-06-08  4:25 ` [PATCH for-next v9 03/10] RDMA/rxe: Enable MW object pool Bob Pearson
2021-06-08  4:25 ` [PATCH for-next v9 04/10] RDMA/rxe: Add ib_alloc_mw and ib_dealloc_mw verbs Bob Pearson
2021-06-08  4:25 ` [PATCH for-next v9 05/10] RDMA/rxe: Replace WR_REG_MASK by WR_LOCAL_OP_MASK Bob Pearson
2021-06-08  4:25 ` [PATCH for-next v9 06/10] RDMA/rxe: Move local ops to subroutine Bob Pearson
2021-06-08  4:25 ` [PATCH for-next v9 07/10] RDMA/rxe: Add support for bind MW work requests Bob Pearson
2021-06-08  4:25 ` [PATCH for-next v9 08/10] RDMA/rxe: Implement invalidate MW operations Bob Pearson
2021-06-08  4:25 ` [PATCH for-next v9 09/10] RDMA/rxe: Implement memory access through MWs Bob Pearson
2021-06-08  4:25 ` [PATCH for-next v9 10/10] RDMA/rxe: Disallow MR dereg and invalidate when bound Bob Pearson
2021-06-18 13:19 ` [PATCH for-next v9 00/10] RDMA/rxe: Implement memory windows Jason Gunthorpe
2021-06-18 15:39   ` Bob Pearson

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