[PATCH 1/2] fs/9p: Don't clunk dentry fid when we fail to get a writeback inode

[PATCH 1/2] fs/9p: Don't clunk dentry fid when we fail to get a writeback inode

[Aneesh Kumar K.V]

The dentry fid get clunked via the dput.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
---
 fs/9p/vfs_inode_dotl.c |   11 ++++++-----
 1 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/fs/9p/vfs_inode_dotl.c b/fs/9p/vfs_inode_dotl.c
index 82a7c38..691c78f 100644
--- a/fs/9p/vfs_inode_dotl.c
+++ b/fs/9p/vfs_inode_dotl.c
@@ -259,7 +259,7 @@ v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, int omode,
 		if (IS_ERR(inode_fid)) {
 			err = PTR_ERR(inode_fid);
 			mutex_unlock(&v9inode->v_mutex);
-			goto error;
+			goto err_clunk_old_fid;
 		}
 		v9inode->writeback_fid = (void *) inode_fid;
 	}
@@ -267,8 +267,8 @@ v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, int omode,
 	/* Since we are opening a file, assign the open fid to the file */
 	filp = lookup_instantiate_filp(nd, dentry, generic_file_open);
 	if (IS_ERR(filp)) {
-		p9_client_clunk(ofid);
-		return PTR_ERR(filp);
+		err = PTR_ERR(filp);
+		goto err_clunk_old_fid;
 	}
 	filp->private_data = ofid;
 #ifdef CONFIG_9P_FSCACHE
@@ -278,10 +278,11 @@ v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, int omode,
 	return 0;
 
 error:
-	if (ofid)
-		p9_client_clunk(ofid);
 	if (fid)
 		p9_client_clunk(fid);
+err_clunk_old_fid:
+	if (ofid)
+		p9_client_clunk(ofid);
 	return err;
 }
 
-- 
1.7.4.1

[PATCH 2/2] net/9p: p9_idpool_get return -1 on error

[Aneesh Kumar K.V]

We need to return -1 on error. Also handle error properly

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
---
 net/9p/client.c |   20 ++++++++++++--------
 net/9p/util.c   |    2 +-
 2 files changed, 13 insertions(+), 9 deletions(-)

diff --git a/net/9p/client.c b/net/9p/client.c
index a9aa2dd..e9d8de1 100644
--- a/net/9p/client.c
+++ b/net/9p/client.c
@@ -307,12 +307,13 @@ static int p9_tag_init(struct p9_client *c)
 	c->tagpool = p9_idpool_create();
 	if (IS_ERR(c->tagpool)) {
 		err = PTR_ERR(c->tagpool);
-		c->tagpool = NULL;
 		goto error;
 	}
-
-	p9_idpool_get(c->tagpool); /* reserve tag 0 */
-
+	err = p9_idpool_get(c->tagpool); /* reserve tag 0 */
+	if (err < 0) {
+		p9_idpool_destroy(c->tagpool);
+		goto error;
+	}
 	c->max_tag = 0;
 error:
 	return err;
@@ -789,11 +790,13 @@ struct p9_client *p9_client_create(const char *dev_name, char *options)
 	spin_lock_init(&clnt->lock);
 	INIT_LIST_HEAD(&clnt->fidlist);
 
-	p9_tag_init(clnt);
+	err = p9_tag_init(clnt);
+	if (err < 0)
+		goto free_client;
 
 	err = parse_opts(options, clnt);
 	if (err < 0)
-		goto free_client;
+		goto destroy_tagpool;
 
 	if (!clnt->trans_mod)
 		clnt->trans_mod = v9fs_get_default_trans();
@@ -802,13 +805,12 @@ struct p9_client *p9_client_create(const char *dev_name, char *options)
 		err = -EPROTONOSUPPORT;
 		P9_DPRINTK(P9_DEBUG_ERROR,
 				"No transport defined or default transport\n");
-		goto free_client;
+		goto destroy_tagpool;
 	}
 
 	clnt->fidpool = p9_idpool_create();
 	if (IS_ERR(clnt->fidpool)) {
 		err = PTR_ERR(clnt->fidpool);
-		clnt->fidpool = NULL;
 		goto put_trans;
 	}
 
@@ -834,6 +836,8 @@ destroy_fidpool:
 	p9_idpool_destroy(clnt->fidpool);
 put_trans:
 	v9fs_put_trans(clnt->trans_mod);
+destroy_tagpool:
+	p9_idpool_destroy(clnt->tagpool);
 free_client:
 	kfree(clnt);
 	return ERR_PTR(err);
diff --git a/net/9p/util.c b/net/9p/util.c
index da6af81..9c1c934 100644
--- a/net/9p/util.c
+++ b/net/9p/util.c
@@ -93,7 +93,7 @@ int p9_idpool_get(struct p9_idpool *p)
 
 retry:
 	if (idr_pre_get(&p->pool, GFP_NOFS) == 0)
-		return 0;
+		return -1;
 
 	spin_lock_irqsave(&p->lock, flags);
 
-- 
1.7.4.1