fs/9p: Add OS dependent open flags in 9p protocol

Some of the flags are OS/arch dependent we add a 9p
protocol value which maps to asm-generic/fcntl.h values in Linux
Based on the original patch from Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>

1 files changed, 15 insertions, 1 deletions

diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index 3563cace0a2e..9e3ea6ce6951 100644
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -553,6 +553,19 @@ v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid,
 }
 
 /**
+ * v9fs_at_to_dotl_flags- convert Linux specific AT flags to
+ * plan 9 AT flag.
+ * @flags: flags to convert
+ */
+static int v9fs_at_to_dotl_flags(int flags)
+{
+        int rflags = 0;
+        if (flags & AT_REMOVEDIR)
+                rflags |= P9_DOTL_AT_REMOVEDIR;
+        return rflags;
+}
+
+/**
  * v9fs_remove - helper function to remove files and directories
  * @dir: directory inode that is being deleted
  * @dentry:  dentry that is being deleted
@@ -579,7 +592,8 @@ static int v9fs_remove(struct inode *dir, struct dentry *dentry, int flags)
                 return retval;
         }
         if (v9fs_proto_dotl(v9ses))
-                retval = p9_client_unlinkat(dfid, dentry->d_name.name, flags);
+                retval = p9_client_unlinkat(dfid, dentry->d_name.name,
+                                            v9fs_at_to_dotl_flags(flags));
         if (retval == -EOPNOTSUPP) {
                 /* Try the one based on path */
                 v9fid = v9fs_fid_clone(dentry);