[PATCH] RPC: parametrize various transport connect timeouts

 Each transport implementation can now set unique bind, connect,
 reestablishment, and idle timeout values.  These are variables,
 allowing the values to be modified dynamically.  This permits
 exponential backoff of any of these values, for instance.

 As an example, we implement exponential backoff for the connection
 reestablishment timeout.

 Test-plan:
 Destructive testing (unplugging the network temporarily).  Connectathon
 with UDP and TCP.

 Signed-off-by: Chuck Lever <cel@netapp.com>
 Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h
index 9a6047ff1b25..7bac2785c6e4 100644
--- a/include/linux/nfs_fs.h
+++ b/include/linux/nfs_fs.h
@@ -41,6 +41,10 @@
 #define NFS_MAX_FILE_IO_BUFFER_SIZE     32768
 #define NFS_DEF_FILE_IO_BUFFER_SIZE     4096
 
+/* Default timeout values */
+#define NFS_MAX_UDP_TIMEOUT     (60*HZ)
+#define NFS_MAX_TCP_TIMEOUT     (600*HZ)
+
 /*
  * superblock magic number for NFS
  */