From 12a31b8011ab258fc726300dcfbb7a03af74adb3 Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Tue, 1 May 2012 15:22:57 -0400 Subject: [PATCH] nfsd_fh: if two exports are possible, choose the one without V4ROOT When nfsd_fh it looking for an export for a particular client and file-handle, it might find two exports for the same path: one with NFSEXP_V4ROOT, one with out. As nfsd_fh calls cache_export_ent to give the export information to the kernel it much choose the same export that auth_authenticate chooses for get_rootfh which it also passes cache_export_ent (via cache_export). i.e. it must choose the non-V4ROOT on where possible. Also change strcmp(foo, bar) to strcmp(foo, bar) == 0 because I have a pathological fear of the former. Signed-off-by: NeilBrown Signed-off-by: Steve Dickson --- utils/mountd/cache.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/utils/mountd/cache.c b/utils/mountd/cache.c index b01c0bd..0af6404 100644 --- a/utils/mountd/cache.c +++ b/utils/mountd/cache.c @@ -596,11 +596,20 @@ static void nfsd_fh(FILE *f) found_path = strdup(path); if (found_path == NULL) goto out; - } else if (strcmp(found->e_path, exp->m_export.e_path) + } else if (strcmp(found->e_path, exp->m_export.e_path) != 0 && !subexport(found, &exp->m_export)) { xlog(L_WARNING, "%s and %s have same filehandle for %s, using first", found_path, path, dom); + } else { + /* same path, if one is V4ROOT, choose the other */ + if (found->e_flags & NFSEXP_V4ROOT) { + found = &exp->m_export; + free(found_path); + found_path = strdup(path); + if (found_path == NULL) + goto out; + } } } } -- 2.39.2