fs/9p: Always ask new inode in create

This make sure we don't end up reusing the unlinked inode object.
The ideal way is to use inode i_generation. But i_generation is
not available in userspace always.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>

1 files changed, 23 insertions, 4 deletions

diff --git a/fs/9p/v9fs.h b/fs/9p/v9fs.h
index 5d7392ead24b..e78956cbd702 100644
--- a/fs/9p/v9fs.h
+++ b/fs/9p/v9fs.h
@@ -153,13 +153,13 @@ extern void v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd,
                         void *p);
 extern struct inode *v9fs_inode_from_fid(struct v9fs_session_info *v9ses,
                                          struct p9_fid *fid,
-                                         struct super_block *sb);
+                                         struct super_block *sb, int new);
 extern const struct inode_operations v9fs_dir_inode_operations_dotl;
 extern const struct inode_operations v9fs_file_inode_operations_dotl;
 extern const struct inode_operations v9fs_symlink_inode_operations_dotl;
 extern struct inode *v9fs_inode_from_fid_dotl(struct v9fs_session_info *v9ses,
                                               struct p9_fid *fid,
-                                              struct super_block *sb);
+                                              struct super_block *sb, int new);
 
 /* other default globals */
 #define V9FS_PORT       564
@@ -201,8 +201,27 @@ v9fs_get_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid,
                         struct super_block *sb)
 {
         if (v9fs_proto_dotl(v9ses))
-                return v9fs_inode_from_fid_dotl(v9ses, fid, sb);
+                return v9fs_inode_from_fid_dotl(v9ses, fid, sb, 0);
         else
-                return v9fs_inode_from_fid(v9ses, fid, sb);
+                return v9fs_inode_from_fid(v9ses, fid, sb, 0);
 }
+
+/**
+ * v9fs_get_new_inode_from_fid - Helper routine to populate an inode by
+ * issuing a attribute request
+ * @v9ses: session information
+ * @fid: fid to issue attribute request for
+ * @sb: superblock on which to create inode
+ *
+ */
+static inline struct inode *
+v9fs_get_new_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid,
+                            struct super_block *sb)
+{
+        if (v9fs_proto_dotl(v9ses))
+                return v9fs_inode_from_fid_dotl(v9ses, fid, sb, 1);
+        else
+                return v9fs_inode_from_fid(v9ses, fid, sb, 1);
+}
+
 #endif