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authorTrond Myklebust <Trond.Myklebust@netapp.com>2013-09-04 10:08:54 -0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2013-09-04 12:26:32 -0400
commitf6de7a39c181dfb8a2c534661a53c73afb3081cd (patch)
tree69a0d52d55f0a32e83bba6a0cd20df154a38f06a /fs/nfs/super.c
parentef1820f9be27b6ad158f433ab38002ab8131db4d (diff)
downloadleg-kernel-f6de7a39c181dfb8a2c534661a53c73afb3081cd.tar.gz
NFSv4: Document the recover_lost_locks kernel parameter
Rename the new 'recover_locks' kernel parameter to 'recover_lost_locks' and change the default to 'false'. Document why in Documentation/kernel-parameters.txt Move the 'recover_lost_locks' kernel parameter to fs/nfs/super.c to make it easy to backport to kernels prior to 3.6.x, which don't have a separate NFSv4 module. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs/super.c')
-rw-r--r--fs/nfs/super.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index f2071d221c77..6ad9053d8906 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -2758,6 +2758,7 @@ bool nfs4_disable_idmapping = true;
unsigned short max_session_slots = NFS4_DEF_SLOT_TABLE_SIZE;
unsigned short send_implementation_id = 1;
char nfs4_client_id_uniquifier[NFS4_CLIENT_ID_UNIQ_LEN] = "";
+bool recover_lost_locks = false;
EXPORT_SYMBOL_GPL(nfs_callback_set_tcpport);
EXPORT_SYMBOL_GPL(nfs_callback_tcpport);
@@ -2766,6 +2767,7 @@ EXPORT_SYMBOL_GPL(nfs4_disable_idmapping);
EXPORT_SYMBOL_GPL(max_session_slots);
EXPORT_SYMBOL_GPL(send_implementation_id);
EXPORT_SYMBOL_GPL(nfs4_client_id_uniquifier);
+EXPORT_SYMBOL_GPL(recover_lost_locks);
#define NFS_CALLBACK_MAXPORTNR (65535U)
@@ -2803,4 +2805,10 @@ MODULE_PARM_DESC(send_implementation_id,
"Send implementation ID with NFSv4.1 exchange_id");
MODULE_PARM_DESC(nfs4_unique_id, "nfs_client_id4 uniquifier string");
+module_param(recover_lost_locks, bool, 0644);
+MODULE_PARM_DESC(recover_lost_locks,
+ "If the server reports that a lock might be lost, "
+ "try to recover it risking data corruption.");
+
+
#endif /* CONFIG_NFS_V4 */