nfsd: Ensure that nfsd_create_setattr commits files to stable storage
Since nfsd_create_setattr strips the mode from the struct iattr, it
is quite possible that it will optimise away the call to nfsd_setattr
altogether.
If this is the case, then we never call commit_metadata() on the
newly created file.
Also ensure that both nfsd_setattr() and nfsd_create_setattr() fail
when the call to commit_metadata fails.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index 730f319..e1b792a 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -463,7 +463,7 @@
if (size_change)
put_write_access(inode);
if (!err)
- commit_metadata(fhp);
+ err = commit_metadata(fhp);
out:
return err;
}
@@ -1121,7 +1121,8 @@
iap->ia_valid &= ~(ATTR_UID|ATTR_GID);
if (iap->ia_valid)
return nfsd_setattr(rqstp, resfhp, iap, 0, (time_t)0);
- return 0;
+ /* Callers expect file metadata to be committed here */
+ return commit_metadata(resfhp);
}
/* HPUX client sometimes creates a file in mode 000, and sets size to 0.
@@ -1253,9 +1254,10 @@
err = nfsd_create_setattr(rqstp, resfhp, iap);
/*
- * nfsd_setattr already committed the child. Transactional filesystems
- * had a chance to commit changes for both parent and child
- * simultaneously making the following commit_metadata a noop.
+ * nfsd_create_setattr already committed the child. Transactional
+ * filesystems had a chance to commit changes for both parent and
+ * child * simultaneously making the following commit_metadata a
+ * noop.
*/
err2 = nfserrno(commit_metadata(fhp));
if (err2)
@@ -1426,7 +1428,8 @@
err = nfsd_create_setattr(rqstp, resfhp, iap);
/*
- * nfsd_setattr already committed the child (and possibly also the parent).
+ * nfsd_create_setattr already committed the child
+ * (and possibly also the parent).
*/
if (!err)
err = nfserrno(commit_metadata(fhp));