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author | Trond Myklebust <Trond.Myklebust@netapp.com> | 2007-06-14 20:40:31 (GMT) |
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committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2007-07-11 03:40:28 (GMT) |
commit | 34f52e3591f241b825353ba27def956d8487c400 (patch) | |
tree | 9f7f0cd52f206095217bd2469e31c2531cbae0a4 /net/sunrpc/clnt.c | |
parent | c44fe705530ff9ea5e563bf9b65bdd29defe682b (diff) | |
download | linux-fsl-qoriq-34f52e3591f241b825353ba27def956d8487c400.tar.xz |
SUNRPC: Convert rpc_clnt->cl_users to a kref
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'net/sunrpc/clnt.c')
-rw-r--r-- | net/sunrpc/clnt.c | 57 |
1 files changed, 28 insertions, 29 deletions
diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c index 424dfdc..254a6e1 100644 --- a/net/sunrpc/clnt.c +++ b/net/sunrpc/clnt.c @@ -121,7 +121,6 @@ static struct rpc_clnt * rpc_new_client(struct rpc_xprt *xprt, char *servname, s clnt = kzalloc(sizeof(*clnt), GFP_KERNEL); if (!clnt) goto out_err; - atomic_set(&clnt->cl_users, 0); atomic_set(&clnt->cl_count, 1); clnt->cl_parent = clnt; @@ -157,6 +156,8 @@ static struct rpc_clnt * rpc_new_client(struct rpc_xprt *xprt, char *servname, s clnt->cl_rtt = &clnt->cl_rtt_default; rpc_init_rtt(&clnt->cl_rtt_default, xprt->timeout.to_initval); + kref_init(&clnt->cl_kref); + err = rpc_setup_pipedir(clnt, program->pipe_dir_name); if (err < 0) goto out_no_path; @@ -272,10 +273,10 @@ rpc_clone_client(struct rpc_clnt *clnt) if (!new) goto out_no_clnt; atomic_set(&new->cl_count, 1); - atomic_set(&new->cl_users, 0); new->cl_metrics = rpc_alloc_iostats(clnt); if (new->cl_metrics == NULL) goto out_no_stats; + kref_init(&new->cl_kref); err = rpc_setup_pipedir(new, clnt->cl_program->pipe_dir_name); if (err != 0) goto out_no_path; @@ -311,40 +312,28 @@ out_no_clnt: int rpc_shutdown_client(struct rpc_clnt *clnt) { - dprintk("RPC: shutting down %s client for %s, tasks=%d\n", - clnt->cl_protname, clnt->cl_server, - atomic_read(&clnt->cl_users)); + dprintk("RPC: shutting down %s client for %s\n", + clnt->cl_protname, clnt->cl_server); - while (atomic_read(&clnt->cl_users) > 0) { + while (!list_empty(&clnt->cl_tasks)) { /* Don't let rpc_release_client destroy us */ clnt->cl_oneshot = 0; clnt->cl_dead = 0; rpc_killall_tasks(clnt); wait_event_timeout(destroy_wait, - !atomic_read(&clnt->cl_users), 1*HZ); - } - - if (atomic_read(&clnt->cl_users) < 0) { - printk(KERN_ERR "RPC: rpc_shutdown_client clnt %p tasks=%d\n", - clnt, atomic_read(&clnt->cl_users)); -#ifdef RPC_DEBUG - rpc_show_tasks(); -#endif - BUG(); + list_empty(&clnt->cl_tasks), 1*HZ); } return rpc_destroy_client(clnt); } /* - * Delete an RPC client + * Free an RPC client */ -int -rpc_destroy_client(struct rpc_clnt *clnt) +static void +rpc_free_client(struct kref *kref) { - if (!atomic_dec_and_test(&clnt->cl_count)) - return 1; - BUG_ON(atomic_read(&clnt->cl_users) != 0); + struct rpc_clnt *clnt = container_of(kref, struct rpc_clnt, cl_kref); dprintk("RPC: destroying %s client for %s\n", clnt->cl_protname, clnt->cl_server); @@ -368,23 +357,33 @@ out_free: clnt->cl_metrics = NULL; xprt_put(clnt->cl_xprt); kfree(clnt); - return 0; } /* - * Release an RPC client + * Release reference to the RPC client */ void rpc_release_client(struct rpc_clnt *clnt) { - dprintk("RPC: rpc_release_client(%p, %d)\n", - clnt, atomic_read(&clnt->cl_users)); + dprintk("RPC: rpc_release_client(%p)\n", clnt); - if (!atomic_dec_and_test(&clnt->cl_users)) - return; - wake_up(&destroy_wait); + if (list_empty(&clnt->cl_tasks)) + wake_up(&destroy_wait); if (clnt->cl_oneshot || clnt->cl_dead) rpc_destroy_client(clnt); + kref_put(&clnt->cl_kref, rpc_free_client); +} + +/* + * Delete an RPC client + */ +int +rpc_destroy_client(struct rpc_clnt *clnt) +{ + if (!atomic_dec_and_test(&clnt->cl_count)) + return 1; + kref_put(&clnt->cl_kref, rpc_free_client); + return 0; } /** |