fuse: clean up args in fuse_finish_open() and fuse_release_fill()

Move setting ff->fh, ff->nodeid and file->private_data outside
fuse_finish_open().  Add ->open_flags member to struct fuse_file.

This simplifies the argument passing to fuse_finish_open() and
fuse_release_fill(), and paves the way for creating an open helper
that doesn't need an inode pointer.
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>

fs/fuse/dir.c

@@ -365,9 +365,9 @@ static struct dentry *fuse_lookup(struct inode *dir, struct dentry *entry,
  * Synchronous release for the case when something goes wrong in CREATE_OPEN
  */
 static void fuse_sync_release(struct fuse_conn *fc, struct fuse_file *ff,
-			      u64 nodeid, int flags)
+			      int flags)
 {
-	fuse_release_fill(ff, nodeid, flags, FUSE_RELEASE);
+	fuse_release_fill(ff, flags, FUSE_RELEASE);
 	ff->reserved_req->force = 1;
 	fuse_request_send(fc, ff->reserved_req);
 	fuse_put_request(fc, ff->reserved_req);
@@ -445,12 +445,14 @@ static int fuse_create_open(struct inode *dir, struct dentry *entry, int mode,
 		goto out_free_ff;
 
 	fuse_put_request(fc, req);
+	ff->fh = outopen.fh;
+	ff->nodeid = outentry.nodeid;
+	ff->open_flags = outopen.open_flags;
 	inode = fuse_iget(dir->i_sb, outentry.nodeid, outentry.generation,
 			  &outentry.attr, entry_attr_timeout(&outentry), 0);
 	if (!inode) {
 		flags &= ~(O_CREAT | O_EXCL | O_TRUNC);
-		ff->fh = outopen.fh;
-		fuse_sync_release(fc, ff, outentry.nodeid, flags);
+		fuse_sync_release(fc, ff, flags);
 		fuse_send_forget(fc, forget_req, outentry.nodeid, 1);
 		return -ENOMEM;
 	}
@@ -460,11 +462,11 @@ static int fuse_create_open(struct inode *dir, struct dentry *entry, int mode,
 	fuse_invalidate_attr(dir);
 	file = lookup_instantiate_filp(nd, entry, generic_file_open);
 	if (IS_ERR(file)) {
-		ff->fh = outopen.fh;
-		fuse_sync_release(fc, ff, outentry.nodeid, flags);
+		fuse_sync_release(fc, ff, flags);
 		return PTR_ERR(file);
 	}
-	fuse_finish_open(inode, file, ff, &outopen);
+	file->private_data = fuse_file_get(ff);
+	fuse_finish_open(inode, file);
 	return 0;
 
  out_free_ff:

fs/fuse/file.c

@@ -79,7 +79,7 @@ void fuse_file_free(struct fuse_file *ff)
 	kfree(ff);
 }
 
-static struct fuse_file *fuse_file_get(struct fuse_file *ff)
+struct fuse_file *fuse_file_get(struct fuse_file *ff)
 {
 	atomic_inc(&ff->count);
 	return ff;
@@ -102,18 +102,16 @@ static void fuse_file_put(struct fuse_file *ff)
 	}
 }
 
-void fuse_finish_open(struct inode *inode, struct file *file,
-		      struct fuse_file *ff, struct fuse_open_out *outarg)
+void fuse_finish_open(struct inode *inode, struct file *file)
 {
-	if (outarg->open_flags & FOPEN_DIRECT_IO)
+	struct fuse_file *ff = file->private_data;
+
+	if (ff->open_flags & FOPEN_DIRECT_IO)
 		file->f_op = &fuse_direct_io_file_operations;
-	if (!(outarg->open_flags & FOPEN_KEEP_CACHE))
+	if (!(ff->open_flags & FOPEN_KEEP_CACHE))
 		invalidate_inode_pages2(inode->i_mapping);
-	if (outarg->open_flags & FOPEN_NONSEEKABLE)
+	if (ff->open_flags & FOPEN_NONSEEKABLE)
 		nonseekable_open(inode, file);
-	ff->fh = outarg->fh;
-	ff->nodeid = get_node_id(inode);
-	file->private_data = fuse_file_get(ff);
 }
 
 int fuse_open_common(struct inode *inode, struct file *file, int isdir)
@@ -141,13 +139,17 @@ int fuse_open_common(struct inode *inode, struct file *file, int isdir)
 	else {
 		if (isdir)
 			outarg.open_flags &= ~FOPEN_DIRECT_IO;
-		fuse_finish_open(inode, file, ff, &outarg);
+		ff->fh = outarg.fh;
+		ff->nodeid = get_node_id(inode);
+		ff->open_flags = outarg.open_flags;
+		file->private_data = fuse_file_get(ff);
+		fuse_finish_open(inode, file);
 	}
 
 	return err;
 }
 
-void fuse_release_fill(struct fuse_file *ff, u64 nodeid, int flags, int opcode)
+void fuse_release_fill(struct fuse_file *ff, int flags, int opcode)
 {
 	struct fuse_req *req = ff->reserved_req;
 	struct fuse_release_in *inarg = &req->misc.release.in;
@@ -155,7 +157,7 @@ void fuse_release_fill(struct fuse_file *ff, u64 nodeid, int flags, int opcode)
 	inarg->fh = ff->fh;
 	inarg->flags = flags;
 	req->in.h.opcode = opcode;
-	req->in.h.nodeid = nodeid;
+	req->in.h.nodeid = ff->nodeid;
 	req->in.numargs = 1;
 	req->in.args[0].size = sizeof(struct fuse_release_in);
 	req->in.args[0].value = inarg;
@@ -174,7 +176,7 @@ int fuse_release_common(struct inode *inode, struct file *file, int isdir)
 	fc = get_fuse_conn(inode);
 	req = ff->reserved_req;
 
-	fuse_release_fill(ff, get_node_id(inode), file->f_flags,
+	fuse_release_fill(ff, file->f_flags,
 			  isdir ? FUSE_RELEASEDIR : FUSE_RELEASE);
 
 	/* Hold vfsmount and dentry until release is finished */

fs/fuse/fuse_i.h

@@ -119,6 +119,9 @@ struct fuse_file {
 	/** Refcount */
 	atomic_t count;
 
+	/** FOPEN_* flags returned by open */
+	u32 open_flags;
+
 	/** Entry on inode's write_files list */
 	struct list_head write_entry;
 
@@ -528,12 +531,12 @@ void fuse_read_fill(struct fuse_req *req, struct file *file,
 int fuse_open_common(struct inode *inode, struct file *file, int isdir);
 
 struct fuse_file *fuse_file_alloc(struct fuse_conn *fc);
+struct fuse_file *fuse_file_get(struct fuse_file *ff);
 void fuse_file_free(struct fuse_file *ff);
-void fuse_finish_open(struct inode *inode, struct file *file,
-		      struct fuse_file *ff, struct fuse_open_out *outarg);
+void fuse_finish_open(struct inode *inode, struct file *file);
 
 /** Fill in ff->reserved_req with a RELEASE request */
-void fuse_release_fill(struct fuse_file *ff, u64 nodeid, int flags, int opcode);
+void fuse_release_fill(struct fuse_file *ff, int flags, int opcode);
 
 /**
  * Send RELEASE or RELEASEDIR request