From 65178db42a02c7984f711614546e97e9952d8e01 Mon Sep 17 00:00:00 2001 From: Bryan Schumaker Date: Tue, 1 Nov 2011 13:35:21 -0400 Subject: NFSD: Added fault injection Fault injection on the NFS server makes it easier to test the client's state manager and recovery threads. Simulating errors on the server is easier than finding the right conditions that cause them naturally. This patch uses debugfs to add a simple framework for fault injection to the server. This framework is a config option, and can be enabled through CONFIG_NFSD_FAULT_INJECTION. Assuming you have debugfs mounted to /sys/debug, a set of files will be created in /sys/debug/nfsd/. Writing to any of these files will cause the corresponding action and write a log entry to dmesg. Signed-off-by: Bryan Schumaker Signed-off-by: J. Bruce Fields --- fs/nfsd/nfsctl.c | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'fs/nfsd/nfsctl.c') diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c index c45a2ea4a090..b2e8093ebc21 100644 --- a/fs/nfsd/nfsctl.c +++ b/fs/nfsd/nfsctl.c @@ -18,6 +18,7 @@ #include "idmap.h" #include "nfsd.h" #include "cache.h" +#include "fault_inject.h" /* * We have a single directory with several nodes in it. @@ -1131,6 +1132,9 @@ static int __init init_nfsd(void) retval = nfs4_state_init(); /* nfs4 locking state */ if (retval) return retval; + retval = nfsd_fault_inject_init(); /* nfsd fault injection controls */ + if (retval) + goto out_free_slabs; nfsd_stat_init(); /* Statistics */ retval = nfsd_reply_cache_init(); if (retval) @@ -1161,6 +1165,8 @@ out_free_cache: nfsd_reply_cache_shutdown(); out_free_stat: nfsd_stat_shutdown(); + nfsd_fault_inject_cleanup(); +out_free_slabs: nfsd4_free_slabs(); return retval; } @@ -1175,6 +1181,7 @@ static void __exit exit_nfsd(void) nfsd_lockd_shutdown(); nfsd_idmap_shutdown(); nfsd4_free_slabs(); + nfsd_fault_inject_cleanup(); unregister_filesystem(&nfsd_fs_type); } -- cgit v1.2.1