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>

3 files changed, 30 insertions, 23 deletions

diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index 222584b34ce4..da87a3d8a8ea 100644
--- a/fs/fuse/dir.c
+++ b/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:
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index aa4a3876ca37..d9458cace425 100644
--- a/fs/fuse/file.c
+++ b/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 */
diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h
index a51f63c7d423..ce46c120f48a 100644
--- a/fs/fuse/fuse_i.h
+++ b/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