9p: VFS switches for 9p2000.L: VFS switches

Implements VFS switches for 9p2000.L protocol.

Signed-off-by: Sripathi Kodi <sripathik@in.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>

1 files changed, 60 insertions, 11 deletions

diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index f2434fc9d2c4..13a8ed6088b8 100644
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -44,9 +44,12 @@
 #include "cache.h"
 
 static const struct inode_operations v9fs_dir_inode_operations;
-static const struct inode_operations v9fs_dir_inode_operations_ext;
+static const struct inode_operations v9fs_dir_inode_operations_dotu;
+static const struct inode_operations v9fs_dir_inode_operations_dotl;
 static const struct inode_operations v9fs_file_inode_operations;
+static const struct inode_operations v9fs_file_inode_operations_dotl;
 static const struct inode_operations v9fs_symlink_inode_operations;
+static const struct inode_operations v9fs_symlink_inode_operations_dotl;
 
 /**
  * unixmode2p9mode - convert unix mode bits to plan 9
@@ -275,25 +278,44 @@ struct inode *v9fs_get_inode(struct super_block *sb, int mode)
 		init_special_inode(inode, inode->i_mode, inode->i_rdev);
 		break;
 	case S_IFREG:
-		inode->i_op = &v9fs_file_inode_operations;
-		inode->i_fop = &v9fs_file_operations;
+		if (v9fs_proto_dotl(v9ses)) {
+			inode->i_op = &v9fs_file_inode_operations_dotl;
+			inode->i_fop = &v9fs_file_operations_dotl;
+		} else {
+			inode->i_op = &v9fs_file_inode_operations;
+			inode->i_fop = &v9fs_file_operations;
+		}
+
 		break;
+
 	case S_IFLNK:
-		if (!v9fs_proto_dotu(v9ses)) {
-			P9_DPRINTK(P9_DEBUG_ERROR,
-				   "extended modes used w/o 9P2000.u\n");
+		if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) {
+			P9_DPRINTK(P9_DEBUG_ERROR, "extended modes used with "
+						"legacy protocol.\n");
 			err = -EINVAL;
 			goto error;
 		}
-		inode->i_op = &v9fs_symlink_inode_operations;
+
+		if (v9fs_proto_dotl(v9ses))
+			inode->i_op = &v9fs_symlink_inode_operations_dotl;
+		else
+			inode->i_op = &v9fs_symlink_inode_operations;
+
 		break;
 	case S_IFDIR:
 		inc_nlink(inode);
-		if (v9fs_proto_dotu(v9ses))
-			inode->i_op = &v9fs_dir_inode_operations_ext;
+		if (v9fs_proto_dotl(v9ses))
+			inode->i_op = &v9fs_dir_inode_operations_dotl;
+		else if (v9fs_proto_dotu(v9ses))
+			inode->i_op = &v9fs_dir_inode_operations_dotu;
 		else
 			inode->i_op = &v9fs_dir_inode_operations;
-		inode->i_fop = &v9fs_dir_operations;
+
+		if (v9fs_proto_dotl(v9ses))
+			inode->i_fop = &v9fs_dir_operations_dotl;
+		else
+			inode->i_fop = &v9fs_dir_operations;
+
 		break;
 	default:
 		P9_DPRINTK(P9_DEBUG_ERROR, "BAD mode 0x%x S_IFMT 0x%x\n",
@@ -1208,7 +1230,21 @@ v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev)
 	return retval;
 }
 
-static const struct inode_operations v9fs_dir_inode_operations_ext = {
+static const struct inode_operations v9fs_dir_inode_operations_dotu = {
+	.create = v9fs_vfs_create,
+	.lookup = v9fs_vfs_lookup,
+	.symlink = v9fs_vfs_symlink,
+	.link = v9fs_vfs_link,
+	.unlink = v9fs_vfs_unlink,
+	.mkdir = v9fs_vfs_mkdir,
+	.rmdir = v9fs_vfs_rmdir,
+	.mknod = v9fs_vfs_mknod,
+	.rename = v9fs_vfs_rename,
+	.getattr = v9fs_vfs_getattr,
+	.setattr = v9fs_vfs_setattr,
+};
+
+static const struct inode_operations v9fs_dir_inode_operations_dotl = {
 	.create = v9fs_vfs_create,
 	.lookup = v9fs_vfs_lookup,
 	.symlink = v9fs_vfs_symlink,
@@ -1239,6 +1275,11 @@ static const struct inode_operations v9fs_file_inode_operations = {
 	.setattr = v9fs_vfs_setattr,
 };
 
+static const struct inode_operations v9fs_file_inode_operations_dotl = {
+	.getattr = v9fs_vfs_getattr,
+	.setattr = v9fs_vfs_setattr,
+};
+
 static const struct inode_operations v9fs_symlink_inode_operations = {
 	.readlink = generic_readlink,
 	.follow_link = v9fs_vfs_follow_link,
@@ -1246,3 +1287,11 @@ static const struct inode_operations v9fs_symlink_inode_operations = {
 	.getattr = v9fs_vfs_getattr,
 	.setattr = v9fs_vfs_setattr,
 };
+
+static const struct inode_operations v9fs_symlink_inode_operations_dotl = {
+	.readlink = generic_readlink,
+	.follow_link = v9fs_vfs_follow_link,
+	.put_link = v9fs_vfs_put_link,
+	.getattr = v9fs_vfs_getattr,
+	.setattr = v9fs_vfs_setattr,
+};