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authorJeff Layton <jlayton@redhat.com>2012-03-21 09:52:02 -0400
committerJ. Bruce Fields <bfields@redhat.com>2012-03-26 11:49:47 -0400
commita52d726bbd928164609e6abc4dc967e819dbf09c (patch)
tree604df65589a95311ab297f80ce377e82525ce597 /fs/nfsd/nfs4callback.c
parent1df00640c9111c881633d9b219f18e66c52599ec (diff)
downloadlinux-a52d726bbd928164609e6abc4dc967e819dbf09c.tar.bz2
nfsd: convert nfs4_client->cl_cb_flags to a generic flags field
We'll need a way to flag the nfs4_client as already being recorded on stable storage so that we don't continually upcall. Currently, that's recorded in the cl_firststate field of the client struct. Using an entire u32 to store a flag is rather wasteful though. The cl_cb_flags field is only using 2 bits right now, so repurpose that to a generic flags field. Rename NFSD4_CLIENT_KILL to NFSD4_CLIENT_CB_KILL to make it evident that it's part of the callback flags. Add a mask that we can use for existing checks that look to see whether any flags are set, so that the new flags don't interfere. Convert all references to cl_firstate to the NFSD4_CLIENT_STABLE flag, and add a new NFSD4_CLIENT_RECLAIM_COMPLETE flag. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'fs/nfsd/nfs4callback.c')
-rw-r--r--fs/nfsd/nfs4callback.c14
1 files changed, 7 insertions, 7 deletions
diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c
index cf6e4190e41c..0840fc4f7e4a 100644
--- a/fs/nfsd/nfs4callback.c
+++ b/fs/nfsd/nfs4callback.c
@@ -754,9 +754,9 @@ static void do_probe_callback(struct nfs4_client *clp)
*/
void nfsd4_probe_callback(struct nfs4_client *clp)
{
- /* XXX: atomicity? Also, should we be using cl_cb_flags? */
+ /* XXX: atomicity? Also, should we be using cl_flags? */
clp->cl_cb_state = NFSD4_CB_UNKNOWN;
- set_bit(NFSD4_CLIENT_CB_UPDATE, &clp->cl_cb_flags);
+ set_bit(NFSD4_CLIENT_CB_UPDATE, &clp->cl_flags);
do_probe_callback(clp);
}
@@ -915,7 +915,7 @@ void nfsd4_destroy_callback_queue(void)
/* must be called under the state lock */
void nfsd4_shutdown_callback(struct nfs4_client *clp)
{
- set_bit(NFSD4_CLIENT_KILL, &clp->cl_cb_flags);
+ set_bit(NFSD4_CLIENT_CB_KILL, &clp->cl_flags);
/*
* Note this won't actually result in a null callback;
* instead, nfsd4_do_callback_rpc() will detect the killed
@@ -966,15 +966,15 @@ static void nfsd4_process_cb_update(struct nfsd4_callback *cb)
svc_xprt_put(clp->cl_cb_conn.cb_xprt);
clp->cl_cb_conn.cb_xprt = NULL;
}
- if (test_bit(NFSD4_CLIENT_KILL, &clp->cl_cb_flags))
+ if (test_bit(NFSD4_CLIENT_CB_KILL, &clp->cl_flags))
return;
spin_lock(&clp->cl_lock);
/*
* Only serialized callback code is allowed to clear these
* flags; main nfsd code can only set them:
*/
- BUG_ON(!clp->cl_cb_flags);
- clear_bit(NFSD4_CLIENT_CB_UPDATE, &clp->cl_cb_flags);
+ BUG_ON(!(clp->cl_flags & NFSD4_CLIENT_CB_FLAG_MASK));
+ clear_bit(NFSD4_CLIENT_CB_UPDATE, &clp->cl_flags);
memcpy(&conn, &cb->cb_clp->cl_cb_conn, sizeof(struct nfs4_cb_conn));
c = __nfsd4_find_backchannel(clp);
if (c) {
@@ -1000,7 +1000,7 @@ void nfsd4_do_callback_rpc(struct work_struct *w)
struct nfs4_client *clp = cb->cb_clp;
struct rpc_clnt *clnt;
- if (clp->cl_cb_flags)
+ if (clp->cl_flags & NFSD4_CLIENT_CB_FLAG_MASK)
nfsd4_process_cb_update(cb);
clnt = clp->cl_cb_client;