nfsd: don't support msnfs export option
We've long had these pointless #ifdef MSNFS's sprinkled throughout the
code--pointless because MSNFS is always defined (and we give no config
option to make that easy to change). So we could just remove the
ifdef's and compile the resulting code unconditionally.
But as long as we're there: why not just rip out this code entirely?
The only purpose is to implement the "msnfs" export option which turns
on Windows-like behavior in some cases, and:
- the export option isn't documented anywhere;
- the userland utilities (which would need to be able to parse
"msnfs" in an export file) don't support it;
- I don't know how to maintain this, as I don't know what the
proper behavior is; and
- google shows no evidence that anyone has ever used this.
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index b991125..0a01e2f 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -1,4 +1,3 @@
-#define MSNFS /* HACK HACK */
/*
* File operations used by nfsd. Some of these have been ripped from
* other parts of the kernel because they weren't exported, others
@@ -875,15 +874,6 @@
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)
@@ -896,9 +886,6 @@
err = nfserr_perm;
inode = file->f_path.dentry->d_inode;
- if (svc_msnfs(fhp) && !lock_may_read(inode, offset, *count))
- goto out;
-
if (file->f_op->splice_read && rqstp->rq_splice_ok) {
struct splice_desc sd = {
.len = 0,
@@ -923,7 +910,6 @@
fsnotify_access(file);
} else
err = nfserrno(host_err);
-out:
return err;
}
@@ -988,14 +974,6 @@
int stable = *stablep;
int use_wgather;
-#ifdef MSNFS
- err = nfserr_perm;
-
- if ((fhp->fh_export->ex_flags & NFSEXP_MSNFS) &&
- (!lock_may_write(file->f_path.dentry->d_inode, offset, *cnt)))
- goto out;
-#endif
-
dentry = file->f_path.dentry;
inode = dentry->d_inode;
exp = fhp->fh_export;
@@ -1046,7 +1024,6 @@
err = 0;
else
err = nfserrno(host_err);
-out:
return err;
}
@@ -1751,13 +1728,6 @@
if (ndentry == trap)
goto out_dput_new;
- if (svc_msnfs(ffhp) &&
- ((atomic_read(&odentry->d_count) > 1)
- || (atomic_read(&ndentry->d_count) > 1))) {
- host_err = -EPERM;
- goto out_dput_new;
- }
-
host_err = -EXDEV;
if (ffhp->fh_export->ex_path.mnt != tfhp->fh_export->ex_path.mnt)
goto out_dput_new;
@@ -1836,17 +1806,10 @@
if (host_err)
goto out_nfserr;
- if (type != S_IFDIR) { /* It's UNLINK */
-#ifdef MSNFS
- if ((fhp->fh_export->ex_flags & NFSEXP_MSNFS) &&
- (atomic_read(&rdentry->d_count) > 1)) {
- host_err = -EPERM;
- } else
-#endif
+ if (type != S_IFDIR)
host_err = vfs_unlink(dirp, rdentry);
- } else { /* It's RMDIR */
+ else
host_err = vfs_rmdir(dirp, rdentry);
- }
dput(rdentry);