From e21fc2038c1b978b89bbc3d45a4c5c6ef598e178 Mon Sep 17 00:00:00 2001 From: Amir Goldstein Date: Mon, 23 Oct 2023 21:07:59 +0300 Subject: exportfs: make ->encode_fh() a mandatory method for NFS export Rename the default helper for encoding FILEID_INO32_GEN* file handles to generic_encode_ino32_fh() and convert the filesystems that used the default implementation to use the generic helper explicitly. After this change, exportfs_encode_inode_fh() no longer has a default implementation to encode FILEID_INO32_GEN* file handles. This is a step towards allowing filesystems to encode non-decodeable file handles for fanotify without having to implement any export_operations. Reviewed-by: Jan Kara Reviewed-by: Jeff Layton Acked-by: Chuck Lever Signed-off-by: Amir Goldstein Link: https://lore.kernel.org/r/20231023180801.2953446-3-amir73il@gmail.com Acked-by: Dave Kleikamp Reviewed-by: Christoph Hellwig Signed-off-by: Christian Brauner --- fs/exportfs/expfs.c | 16 +++++++++------- 1 file changed, 9 insertions(+), 7 deletions(-) (limited to 'fs/exportfs') diff --git a/fs/exportfs/expfs.c b/fs/exportfs/expfs.c index 9ee205df8fa7..8f883c4758f5 100644 --- a/fs/exportfs/expfs.c +++ b/fs/exportfs/expfs.c @@ -343,20 +343,21 @@ out: } /** - * export_encode_fh - default export_operations->encode_fh function + * generic_encode_ino32_fh - generic export_operations->encode_fh function * @inode: the object to encode - * @fid: where to store the file handle fragment - * @max_len: maximum length to store there + * @fh: where to store the file handle fragment + * @max_len: maximum length to store there (in 4 byte units) * @parent: parent directory inode, if wanted * - * This default encode_fh function assumes that the 32 inode number + * This generic encode_fh function assumes that the 32 inode number * is suitable for locating an inode, and that the generation number * can be used to check that it is still valid. It places them in the * filehandle fragment where export_decode_fh expects to find them. */ -static int export_encode_fh(struct inode *inode, struct fid *fid, - int *max_len, struct inode *parent) +int generic_encode_ino32_fh(struct inode *inode, __u32 *fh, int *max_len, + struct inode *parent) { + struct fid *fid = (void *)fh; int len = *max_len; int type = FILEID_INO32_GEN; @@ -380,6 +381,7 @@ static int export_encode_fh(struct inode *inode, struct fid *fid, *max_len = len; return type; } +EXPORT_SYMBOL_GPL(generic_encode_ino32_fh); /** * exportfs_encode_inode_fh - encode a file handle from inode @@ -402,7 +404,7 @@ int exportfs_encode_inode_fh(struct inode *inode, struct fid *fid, if (nop && nop->encode_fh) return nop->encode_fh(inode, fid->raw, max_len, parent); - return export_encode_fh(inode, fid, max_len, parent); + return -EOPNOTSUPP; } EXPORT_SYMBOL_GPL(exportfs_encode_inode_fh); -- cgit