fuse: create fuse_do_open() helper for CUSE

Create a helper for sending an OPEN request that doesn't need a struct
inode pointer.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>

3 files changed, 42 insertions, 27 deletions

diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index da87a3d8a8ea..faa3b2f86740 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -1103,7 +1103,7 @@ static void fuse_put_link(struct dentry *dentry, struct nameidata *nd, void *c)
 
 static int fuse_dir_open(struct inode *inode, struct file *file)
 {
-        return fuse_open_common(inode, file, 1);
+        return fuse_open_common(inode, file, true);
 }
 
 static int fuse_dir_release(struct inode *inode, struct file *file)
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index d9458cace425..6bdaa55ae613 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -15,10 +15,9 @@
 
 static const struct file_operations fuse_direct_io_file_operations;
 
-static int fuse_send_open(struct inode *inode, struct file *file, int isdir,
-                          struct fuse_open_out *outargp)
+static int fuse_send_open(struct fuse_conn *fc, u64 nodeid, struct file *file,
+                          int opcode, struct fuse_open_out *outargp)
 {
-        struct fuse_conn *fc = get_fuse_conn(inode);
         struct fuse_open_in inarg;
         struct fuse_req *req;
         int err;
@@ -31,8 +30,8 @@ static int fuse_send_open(struct inode *inode, struct file *file, int isdir,
         inarg.flags = file->f_flags & ~(O_CREAT | O_EXCL | O_NOCTTY);
         if (!fc->atomic_o_trunc)
                 inarg.flags &= ~O_TRUNC;
-        req->in.h.opcode = isdir ? FUSE_OPENDIR : FUSE_OPEN;
-        req->in.h.nodeid = get_node_id(inode);
+        req->in.h.opcode = opcode;
+        req->in.h.nodeid = nodeid;
         req->in.numargs = 1;
         req->in.args[0].size = sizeof(inarg);
         req->in.args[0].value = &inarg;
@@ -102,6 +101,35 @@ static void fuse_file_put(struct fuse_file *ff)
         }
 }
 
+static int fuse_do_open(struct fuse_conn *fc, u64 nodeid, struct file *file,
+                        bool isdir)
+{
+        struct fuse_open_out outarg;
+        struct fuse_file *ff;
+        int err;
+        int opcode = isdir ? FUSE_OPENDIR : FUSE_OPEN;
+
+        ff = fuse_file_alloc(fc);
+        if (!ff)
+                return -ENOMEM;
+
+        err = fuse_send_open(fc, nodeid, file, opcode, &outarg);
+        if (err) {
+                fuse_file_free(ff);
+                return err;
+        }
+
+        if (isdir)
+                outarg.open_flags &= ~FOPEN_DIRECT_IO;
+
+        ff->fh = outarg.fh;
+        ff->nodeid = nodeid;
+        ff->open_flags = outarg.open_flags;
+        file->private_data = fuse_file_get(ff);
+
+        return 0;
+}
+
 void fuse_finish_open(struct inode *inode, struct file *file)
 {
         struct fuse_file *ff = file->private_data;
@@ -114,11 +142,9 @@ void fuse_finish_open(struct inode *inode, struct file *file)
                 nonseekable_open(inode, file);
 }
 
-int fuse_open_common(struct inode *inode, struct file *file, int isdir)
+int fuse_open_common(struct inode *inode, struct file *file, bool isdir)
 {
         struct fuse_conn *fc = get_fuse_conn(inode);
-        struct fuse_open_out outarg;
-        struct fuse_file *ff;
         int err;
 
         /* VFS checks this, but only _after_ ->open() */
@@ -129,24 +155,13 @@ int fuse_open_common(struct inode *inode, struct file *file, int isdir)
         if (err)
                 return err;
 
-        ff = fuse_file_alloc(fc);
-        if (!ff)
-                return -ENOMEM;
-
-        err = fuse_send_open(inode, file, isdir, &outarg);
+        err = fuse_do_open(fc, get_node_id(inode), file, isdir);
         if (err)
-                fuse_file_free(ff);
-        else {
-                if (isdir)
-                        outarg.open_flags &= ~FOPEN_DIRECT_IO;
-                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;
 
-        return err;
+        fuse_finish_open(inode, file);
+
+        return 0;
 }
 
 void fuse_release_fill(struct fuse_file *ff, int flags, int opcode)
@@ -201,7 +216,7 @@ int fuse_release_common(struct inode *inode, struct file *file, int isdir)
 
 static int fuse_open(struct inode *inode, struct file *file)
 {
-        return fuse_open_common(inode, file, 0);
+        return fuse_open_common(inode, file, false);
 }
 
 static int fuse_release(struct inode *inode, struct file *file)
diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h
index ce46c120f48a..429e669d7859 100644
--- a/fs/fuse/fuse_i.h
+++ b/fs/fuse/fuse_i.h
@@ -528,7 +528,7 @@ void fuse_read_fill(struct fuse_req *req, struct file *file,
 /**
  * Send OPEN or OPENDIR request
  */
-int fuse_open_common(struct inode *inode, struct file *file, int isdir);
+int fuse_open_common(struct inode *inode, struct file *file, bool isdir);
 
 struct fuse_file *fuse_file_alloc(struct fuse_conn *fc);
 struct fuse_file *fuse_file_get(struct fuse_file *ff);