make ->atomic_open() return int

Change of calling conventions:
old		new
NULL		1
file		0
ERR_PTR(-ve)	-ve

Caller *knows* that struct file *; no need to return it.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

3 files changed, 18 insertions, 19 deletions

diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c
index 81e5e908df9..d8bfabeeaa2 100644
--- a/fs/ceph/dir.c
+++ b/fs/ceph/dir.c
@@ -634,21 +634,20 @@ static struct dentry *ceph_lookup(struct inode *dir, struct dentry *dentry,
 	return dentry;
 }
 
-struct file *ceph_atomic_open(struct inode *dir, struct dentry *dentry,
-			      struct opendata *od, unsigned flags, umode_t mode,
-			      int *opened)
+int ceph_atomic_open(struct inode *dir, struct dentry *dentry,
+		     struct opendata *od, unsigned flags, umode_t mode,
+		     int *opened)
 {
 	int err;
 	struct dentry *res = NULL;
-	struct file *filp;
 
 	if (!(flags & O_CREAT)) {
 		if (dentry->d_name.len > NAME_MAX)
-			return ERR_PTR(-ENAMETOOLONG);
+			return -ENAMETOOLONG;
 
 		err = ceph_init_dentry(dentry);
 		if (err < 0)
-			return ERR_PTR(err);
+			return err;
 
 		return ceph_lookup_open(dir, dentry, od, flags, mode, opened);
 	}
@@ -656,7 +655,7 @@ struct file *ceph_atomic_open(struct inode *dir, struct dentry *dentry,
 	if (d_unhashed(dentry)) {
 		res = ceph_lookup(dir, dentry, NULL);
 		if (IS_ERR(res))
-			return ERR_CAST(res);
+			return PTR_ERR(res);
 
 		if (res)
 			dentry = res;
@@ -665,14 +664,14 @@ struct file *ceph_atomic_open(struct inode *dir, struct dentry *dentry,
 	/* We don't deal with positive dentries here */
 	if (dentry->d_inode) {
 		finish_no_open(od, res);
-		return NULL;
+		return 1;
 	}
 
 	*opened |= FILE_CREATED;
-	filp = ceph_lookup_open(dir, dentry, od, flags, mode, opened);
+	err = ceph_lookup_open(dir, dentry, od, flags, mode, opened);
 	dput(res);
 
-	return filp;
+	return err;
 }
 
 /*
diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index 4c304a90d04..b8cc3ee5401 100644
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -213,9 +213,9 @@ out:
  * may_open() fails, the struct *file gets cleaned up (i.e.
  * ceph_release gets called).  So fear not!
  */
-struct file *ceph_lookup_open(struct inode *dir, struct dentry *dentry,
-			      struct opendata *od, unsigned flags, umode_t mode,
-			      int *opened)
+int ceph_lookup_open(struct inode *dir, struct dentry *dentry,
+		     struct opendata *od, unsigned flags, umode_t mode,
+		     int *opened)
 {
 	struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb);
 	struct ceph_mds_client *mdsc = fsc->mdsc;
@@ -230,7 +230,7 @@ struct file *ceph_lookup_open(struct inode *dir, struct dentry *dentry,
 	/* do the open */
 	req = prepare_open_request(dir->i_sb, flags, mode);
 	if (IS_ERR(req))
-		return ERR_CAST(req);
+		return PTR_ERR(req);
 	req->r_dentry = dget(dentry);
 	req->r_num_caps = 2;
 	if (flags & O_CREAT) {
@@ -257,10 +257,10 @@ out:
 	dout("ceph_lookup_open result=%p\n", ret);
 
 	if (IS_ERR(ret))
-		return ERR_CAST(ret);
+		return PTR_ERR(ret);
 
 	dput(ret);
-	return err ? ERR_PTR(err) : file;
+	return err;
 }
 
 int ceph_release(struct inode *inode, struct file *file)
diff --git a/fs/ceph/super.h b/fs/ceph/super.h
index f9a325108b4..f7e8e82ec47 100644
--- a/fs/ceph/super.h
+++ b/fs/ceph/super.h
@@ -806,9 +806,9 @@ extern int ceph_copy_from_page_vector(struct page **pages,
 				    loff_t off, size_t len);
 extern struct page **ceph_alloc_page_vector(int num_pages, gfp_t flags);
 extern int ceph_open(struct inode *inode, struct file *file);
-extern struct file *ceph_lookup_open(struct inode *dir, struct dentry *dentry,
-				     struct opendata *od, unsigned flags,
-				     umode_t mode, int *opened);
+extern int ceph_lookup_open(struct inode *dir, struct dentry *dentry,
+			     struct opendata *od, unsigned flags,
+			     umode_t mode, int *opened);
 extern int ceph_release(struct inode *inode, struct file *filp);
 
 /* dir.c */