Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/fs/nfs/callback.c b/fs/nfs/callback.c
new file mode 100644
index 0000000..560d617
--- /dev/null
+++ b/fs/nfs/callback.c
@@ -0,0 +1,187 @@
+/*
+ * linux/fs/nfs/callback.c
+ *
+ * Copyright (C) 2004 Trond Myklebust
+ *
+ * NFSv4 callback handling
+ */
+
+#include <linux/config.h>
+#include <linux/completion.h>
+#include <linux/ip.h>
+#include <linux/module.h>
+#include <linux/smp_lock.h>
+#include <linux/sunrpc/svc.h>
+#include <linux/sunrpc/svcsock.h>
+#include <linux/nfs_fs.h>
+#include "callback.h"
+
+#define NFSDBG_FACILITY NFSDBG_CALLBACK
+
+struct nfs_callback_data {
+ unsigned int users;
+ struct svc_serv *serv;
+ pid_t pid;
+ struct completion started;
+ struct completion stopped;
+};
+
+static struct nfs_callback_data nfs_callback_info;
+static DECLARE_MUTEX(nfs_callback_sema);
+static struct svc_program nfs4_callback_program;
+
+unsigned short nfs_callback_tcpport;
+
+/*
+ * This is the callback kernel thread.
+ */
+static void nfs_callback_svc(struct svc_rqst *rqstp)
+{
+ struct svc_serv *serv = rqstp->rq_server;
+ int err;
+
+ __module_get(THIS_MODULE);
+ lock_kernel();
+
+ nfs_callback_info.pid = current->pid;
+ daemonize("nfsv4-svc");
+ /* Process request with signals blocked, but allow SIGKILL. */
+ allow_signal(SIGKILL);
+
+ complete(&nfs_callback_info.started);
+
+ while (nfs_callback_info.users != 0 || !signalled()) {
+ /*
+ * Listen for a request on the socket
+ */
+ err = svc_recv(serv, rqstp, MAX_SCHEDULE_TIMEOUT);
+ if (err == -EAGAIN || err == -EINTR)
+ continue;
+ if (err < 0) {
+ printk(KERN_WARNING
+ "%s: terminating on error %d\n",
+ __FUNCTION__, -err);
+ break;
+ }
+ dprintk("%s: request from %u.%u.%u.%u\n", __FUNCTION__,
+ NIPQUAD(rqstp->rq_addr.sin_addr.s_addr));
+ svc_process(serv, rqstp);
+ }
+
+ nfs_callback_info.pid = 0;
+ complete(&nfs_callback_info.stopped);
+ unlock_kernel();
+ module_put_and_exit(0);
+}
+
+/*
+ * Bring up the server process if it is not already up.
+ */
+int nfs_callback_up(void)
+{
+ struct svc_serv *serv;
+ struct svc_sock *svsk;
+ int ret = 0;
+
+ lock_kernel();
+ down(&nfs_callback_sema);
+ if (nfs_callback_info.users++ || nfs_callback_info.pid != 0)
+ goto out;
+ init_completion(&nfs_callback_info.started);
+ init_completion(&nfs_callback_info.stopped);
+ serv = svc_create(&nfs4_callback_program, NFS4_CALLBACK_BUFSIZE);
+ ret = -ENOMEM;
+ if (!serv)
+ goto out_err;
+ /* FIXME: We don't want to register this socket with the portmapper */
+ ret = svc_makesock(serv, IPPROTO_TCP, 0);
+ if (ret < 0)
+ goto out_destroy;
+ if (!list_empty(&serv->sv_permsocks)) {
+ svsk = list_entry(serv->sv_permsocks.next,
+ struct svc_sock, sk_list);
+ nfs_callback_tcpport = ntohs(inet_sk(svsk->sk_sk)->sport);
+ dprintk ("Callback port = 0x%x\n", nfs_callback_tcpport);
+ } else
+ BUG();
+ ret = svc_create_thread(nfs_callback_svc, serv);
+ if (ret < 0)
+ goto out_destroy;
+ nfs_callback_info.serv = serv;
+ wait_for_completion(&nfs_callback_info.started);
+out:
+ up(&nfs_callback_sema);
+ unlock_kernel();
+ return ret;
+out_destroy:
+ svc_destroy(serv);
+out_err:
+ nfs_callback_info.users--;
+ goto out;
+}
+
+/*
+ * Kill the server process if it is not already up.
+ */
+int nfs_callback_down(void)
+{
+ int ret = 0;
+
+ lock_kernel();
+ down(&nfs_callback_sema);
+ if (--nfs_callback_info.users || nfs_callback_info.pid == 0)
+ goto out;
+ kill_proc(nfs_callback_info.pid, SIGKILL, 1);
+ wait_for_completion(&nfs_callback_info.stopped);
+out:
+ up(&nfs_callback_sema);
+ unlock_kernel();
+ return ret;
+}
+
+static int nfs_callback_authenticate(struct svc_rqst *rqstp)
+{
+ struct in_addr *addr = &rqstp->rq_addr.sin_addr;
+ struct nfs4_client *clp;
+
+ /* Don't talk to strangers */
+ clp = nfs4_find_client(addr);
+ if (clp == NULL)
+ return SVC_DROP;
+ dprintk("%s: %u.%u.%u.%u NFSv4 callback!\n", __FUNCTION__, NIPQUAD(addr));
+ nfs4_put_client(clp);
+ switch (rqstp->rq_authop->flavour) {
+ case RPC_AUTH_NULL:
+ if (rqstp->rq_proc != CB_NULL)
+ return SVC_DENIED;
+ break;
+ case RPC_AUTH_UNIX:
+ break;
+ case RPC_AUTH_GSS:
+ /* FIXME: RPCSEC_GSS handling? */
+ default:
+ return SVC_DENIED;
+ }
+ return SVC_OK;
+}
+
+/*
+ * Define NFS4 callback program
+ */
+extern struct svc_version nfs4_callback_version1;
+
+static struct svc_version *nfs4_callback_version[] = {
+ [1] = &nfs4_callback_version1,
+};
+
+static struct svc_stat nfs4_callback_stats;
+
+static struct svc_program nfs4_callback_program = {
+ .pg_prog = NFS4_CALLBACK, /* RPC service number */
+ .pg_nvers = ARRAY_SIZE(nfs4_callback_version), /* Number of entries */
+ .pg_vers = nfs4_callback_version, /* version table */
+ .pg_name = "NFSv4 callback", /* service name */
+ .pg_class = "nfs", /* authentication class */
+ .pg_stats = &nfs4_callback_stats,
+ .pg_authenticate = nfs_callback_authenticate,
+};