From: Dave Hansen I'm going to be modifying nfsd_rename() shortly to support read-only bind mounts. This #ifdef is around the area I'm patching, and it starts to get really ugly if I just try to add my new code by itself. Using this little helper makes things a lot cleaner to use. Signed-off-by: Dave Hansen Acked-by: Christoph Hellwig Signed-off-by: Andrew Morton --- fs/nfsd/vfs.c | 15 +++++++++++---- 1 file changed, 11 insertions(+), 4 deletions(-) diff -puN fs/nfsd/vfs.c~r-o-bind-mounts-create-cleanup-helper-svc_msnfs fs/nfsd/vfs.c --- a/fs/nfsd/vfs.c~r-o-bind-mounts-create-cleanup-helper-svc_msnfs +++ a/fs/nfsd/vfs.c @@ -875,6 +875,15 @@ static int nfsd_direct_splice_actor(stru return __splice_from_pipe(pipe, sd, nfsd_splice_actor); } +static inline int svc_msnfs(struct svc_fh *ffhp) +{ +#ifdef MSNFS + return (ffhp->fh_export->ex_flags & NFSEXP_MSNFS); +#else + return 0; +#endif +} + static __be32 nfsd_vfs_read(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file *file, loff_t offset, struct kvec *vec, int vlen, unsigned long *count) @@ -887,11 +896,9 @@ nfsd_vfs_read(struct svc_rqst *rqstp, st err = nfserr_perm; inode = file->f_path.dentry->d_inode; -#ifdef MSNFS - if ((fhp->fh_export->ex_flags & NFSEXP_MSNFS) && - (!lock_may_read(inode, offset, *count))) + + if (svc_msnfs(fhp) && !lock_may_read(inode, offset, *count)) goto out; -#endif /* Get readahead parameters */ ra = nfsd_get_raparms(inode->i_sb->s_dev, inode->i_ino); _