knfsd: allow cache_register to return error on failure
Newer server features such as nfsv4 and gss depend on proc to work, so a
failure to initialize the proc files they need should be treated as
fatal.
Thanks to Andrew Morton for style fix and compile fix in case where
CONFIG_NFSD_V4 is undefined.
Cc: Andrew Morton <akpm@linux-foundation.org>
Acked-by: NeilBrown <neilb@suse.de>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
diff --git a/fs/nfsd/export.c b/fs/nfsd/export.c
index d29b70a..cbbc594 100644
--- a/fs/nfsd/export.c
+++ b/fs/nfsd/export.c
@@ -1637,13 +1637,19 @@
/*
* Initialize the exports module.
*/
-void
+int
nfsd_export_init(void)
{
+ int rv;
dprintk("nfsd: initializing export module.\n");
- cache_register(&svc_export_cache);
- cache_register(&svc_expkey_cache);
+ rv = cache_register(&svc_export_cache);
+ if (rv)
+ return rv;
+ rv = cache_register(&svc_expkey_cache);
+ if (rv)
+ cache_unregister(&svc_export_cache);
+ return rv;
}
diff --git a/fs/nfsd/nfs4idmap.c b/fs/nfsd/nfs4idmap.c
index ef22179..996bd88 100644
--- a/fs/nfsd/nfs4idmap.c
+++ b/fs/nfsd/nfs4idmap.c
@@ -464,11 +464,18 @@
* Exported API
*/
-void
+int
nfsd_idmap_init(void)
{
- cache_register(&idtoname_cache);
- cache_register(&nametoid_cache);
+ int rv;
+
+ rv = cache_register(&idtoname_cache);
+ if (rv)
+ return rv;
+ rv = cache_register(&nametoid_cache);
+ if (rv)
+ cache_unregister(&idtoname_cache);
+ return rv;
}
void
diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c
index 2b95597..4aba926 100644
--- a/fs/nfsd/nfsctl.c
+++ b/fs/nfsd/nfsctl.c
@@ -707,9 +707,13 @@
retval = nfsd_reply_cache_init();
if (retval)
goto out_free_stat;
- nfsd_export_init(); /* Exports table */
+ retval = nfsd_export_init();
+ if (retval)
+ goto out_free_cache;
nfsd_lockd_init(); /* lockd->nfsd callbacks */
- nfsd_idmap_init(); /* Name to ID mapping */
+ retval = nfsd_idmap_init();
+ if (retval)
+ goto out_free_lockd;
retval = create_proc_exports_entry();
if (retval)
goto out_free_idmap;
@@ -720,10 +724,12 @@
out_free_all:
remove_proc_entry("fs/nfs/exports", NULL);
remove_proc_entry("fs/nfs", NULL);
- nfsd_idmap_shutdown();
out_free_idmap:
+ nfsd_idmap_shutdown();
+out_free_lockd:
nfsd_lockd_shutdown();
nfsd_export_shutdown();
+out_free_cache:
nfsd_reply_cache_shutdown();
out_free_stat:
nfsd_stat_shutdown();