* Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
*/
-#include <linux/config.h>
#include <linux/types.h>
#include <linux/time.h>
#include <linux/slab.h>
#include <linux/nfsd/nfsd.h>
#include <linux/lockd/lockd.h>
#include <linux/lockd/share.h>
-#include <linux/lockd/sm_inter.h>
-
#define NLMDBG_FACILITY NLMDBG_CLIENT
-static u32 nlmsvc_callback(struct svc_rqst *, u32, struct nlm_res *);
-
-static const struct rpc_call_ops nlmsvc_callback_ops;
-
#ifdef CONFIG_LOCKD_V4
-static u32
-cast_to_nlm(u32 status, u32 vers)
+static __be32
+cast_to_nlm(__be32 status, u32 vers)
{
/* Note: status is assumed to be in network byte order !!! */
if (vers != 4){
case nlm_lck_denied_nolocks:
case nlm_lck_blocked:
case nlm_lck_denied_grace_period:
+ case nlm_drop_reply:
break;
case nlm4_deadlock:
status = nlm_lck_denied;
/*
* Obtain client and file from arguments
*/
-static u32
+static __be32
nlmsvc_retrieve_args(struct svc_rqst *rqstp, struct nlm_args *argp,
struct nlm_host **hostp, struct nlm_file **filp)
{
struct nlm_host *host = NULL;
struct nlm_file *file = NULL;
struct nlm_lock *lock = &argp->lock;
- u32 error;
+ __be32 error = 0;
/* nfsd callbacks must have been installed for this procedure */
if (!nlmsvc_ops)
return nlm_lck_denied_nolocks;
/* Obtain host handle */
- if (!(host = nlmsvc_lookup_host(rqstp))
- || (argp->monitor && !host->h_monitored && nsm_monitor(host) < 0))
+ if (!(host = nlmsvc_lookup_host(rqstp, lock->caller, lock->len))
+ || (argp->monitor && nsm_monitor(host) < 0))
goto no_locks;
*hostp = host;
return 0;
no_locks:
- if (host)
- nlm_release_host(host);
+ nlm_release_host(host);
+ if (error)
+ return error;
return nlm_lck_denied_nolocks;
}
/*
* NULL: Test for presence of service
*/
-static int
+static __be32
nlmsvc_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
{
dprintk("lockd: NULL called\n");
/*
* TEST: Check for conflicting lock
*/
-static int
+static __be32
nlmsvc_proc_test(struct svc_rqst *rqstp, struct nlm_args *argp,
struct nlm_res *resp)
{
struct nlm_host *host;
struct nlm_file *file;
+ __be32 rc = rpc_success;
dprintk("lockd: TEST called\n");
resp->cookie = argp->cookie;
- /* Don't accept test requests during grace period */
- if (nlmsvc_grace_period) {
- resp->status = nlm_lck_denied_grace_period;
- return rpc_success;
- }
-
/* Obtain client and file */
if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
- return rpc_success;
+ return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
/* Now check for conflicting locks */
- resp->status = cast_status(nlmsvc_testlock(file, &argp->lock, &resp->lock));
+ resp->status = cast_status(nlmsvc_testlock(rqstp, file, host, &argp->lock, &resp->lock, &resp->cookie));
+ if (resp->status == nlm_drop_reply)
+ rc = rpc_drop_reply;
+ else
+ dprintk("lockd: TEST status %d vers %d\n",
+ ntohl(resp->status), rqstp->rq_vers);
- dprintk("lockd: TEST status %d vers %d\n",
- ntohl(resp->status), rqstp->rq_vers);
nlm_release_host(host);
nlm_release_file(file);
- return rpc_success;
+ return rc;
}
-static int
+static __be32
nlmsvc_proc_lock(struct svc_rqst *rqstp, struct nlm_args *argp,
struct nlm_res *resp)
{
struct nlm_host *host;
struct nlm_file *file;
+ __be32 rc = rpc_success;
dprintk("lockd: LOCK called\n");
resp->cookie = argp->cookie;
- /* Don't accept new lock requests during grace period */
- if (nlmsvc_grace_period && !argp->reclaim) {
- resp->status = nlm_lck_denied_grace_period;
- return rpc_success;
- }
-
/* Obtain client and file */
if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
- return rpc_success;
+ return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
#if 0
/* If supplied state doesn't match current state, we assume it's
#endif
/* Now try to lock the file */
- resp->status = cast_status(nlmsvc_lock(rqstp, file, &argp->lock,
- argp->block, &argp->cookie));
+ resp->status = cast_status(nlmsvc_lock(rqstp, file, host, &argp->lock,
+ argp->block, &argp->cookie,
+ argp->reclaim));
+ if (resp->status == nlm_drop_reply)
+ rc = rpc_drop_reply;
+ else
+ dprintk("lockd: LOCK status %d\n", ntohl(resp->status));
- dprintk("lockd: LOCK status %d\n", ntohl(resp->status));
nlm_release_host(host);
nlm_release_file(file);
- return rpc_success;
+ return rc;
}
-static int
+static __be32
nlmsvc_proc_cancel(struct svc_rqst *rqstp, struct nlm_args *argp,
struct nlm_res *resp)
{
resp->cookie = argp->cookie;
/* Don't accept requests during grace period */
- if (nlmsvc_grace_period) {
+ if (locks_in_grace()) {
resp->status = nlm_lck_denied_grace_period;
return rpc_success;
}
/* Obtain client and file */
if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
- return rpc_success;
+ return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
/* Try to cancel request. */
resp->status = cast_status(nlmsvc_cancel_blocked(file, &argp->lock));
/*
* UNLOCK: release a lock
*/
-static int
+static __be32
nlmsvc_proc_unlock(struct svc_rqst *rqstp, struct nlm_args *argp,
struct nlm_res *resp)
{
resp->cookie = argp->cookie;
/* Don't accept new lock requests during grace period */
- if (nlmsvc_grace_period) {
+ if (locks_in_grace()) {
resp->status = nlm_lck_denied_grace_period;
return rpc_success;
}
/* Obtain client and file */
if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
- return rpc_success;
+ return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
/* Now try to remove the lock */
resp->status = cast_status(nlmsvc_unlock(file, &argp->lock));
* GRANTED: A server calls us to tell that a process' lock request
* was granted
*/
-static int
+static __be32
nlmsvc_proc_granted(struct svc_rqst *rqstp, struct nlm_args *argp,
struct nlm_res *resp)
{
resp->cookie = argp->cookie;
dprintk("lockd: GRANTED called\n");
- resp->status = nlmclnt_grant(&rqstp->rq_addr, &argp->lock);
+ resp->status = nlmclnt_grant(svc_addr(rqstp), &argp->lock);
dprintk("lockd: GRANTED status %d\n", ntohl(resp->status));
return rpc_success;
}
/*
+ * This is the generic lockd callback for async RPC calls
+ */
+static void nlmsvc_callback_exit(struct rpc_task *task, void *data)
+{
+ dprintk("lockd: %5u callback returned %d\n", task->tk_pid,
+ -task->tk_status);
+}
+
+static void nlmsvc_callback_release(void *data)
+{
+ lock_kernel();
+ nlm_release_call(data);
+ unlock_kernel();
+}
+
+static const struct rpc_call_ops nlmsvc_callback_ops = {
+ .rpc_call_done = nlmsvc_callback_exit,
+ .rpc_release = nlmsvc_callback_release,
+};
+
+/*
* `Async' versions of the above service routines. They aren't really,
* because we send the callback before the reply proper. I hope this
* doesn't break any clients.
*/
-static int
-nlmsvc_proc_test_msg(struct svc_rqst *rqstp, struct nlm_args *argp,
- void *resp)
+static __be32 nlmsvc_callback(struct svc_rqst *rqstp, u32 proc, struct nlm_args *argp,
+ __be32 (*func)(struct svc_rqst *, struct nlm_args *, struct nlm_res *))
{
- struct nlm_res res;
- u32 stat;
+ struct nlm_host *host;
+ struct nlm_rqst *call;
+ __be32 stat;
- dprintk("lockd: TEST_MSG called\n");
- memset(&res, 0, sizeof(res));
+ host = nlmsvc_lookup_host(rqstp,
+ argp->lock.caller,
+ argp->lock.len);
+ if (host == NULL)
+ return rpc_system_err;
+
+ call = nlm_alloc_call(host);
+ if (call == NULL)
+ return rpc_system_err;
+
+ stat = func(rqstp, argp, &call->a_res);
+ if (stat != 0) {
+ nlm_release_call(call);
+ return stat;
+ }
- if ((stat = nlmsvc_proc_test(rqstp, argp, &res)) == 0)
- stat = nlmsvc_callback(rqstp, NLMPROC_TEST_RES, &res);
- return stat;
+ call->a_flags = RPC_TASK_ASYNC;
+ if (nlm_async_reply(call, proc, &nlmsvc_callback_ops) < 0)
+ return rpc_system_err;
+ return rpc_success;
}
-static int
-nlmsvc_proc_lock_msg(struct svc_rqst *rqstp, struct nlm_args *argp,
+static __be32 nlmsvc_proc_test_msg(struct svc_rqst *rqstp, struct nlm_args *argp,
void *resp)
{
- struct nlm_res res;
- u32 stat;
+ dprintk("lockd: TEST_MSG called\n");
+ return nlmsvc_callback(rqstp, NLMPROC_TEST_RES, argp, nlmsvc_proc_test);
+}
+static __be32 nlmsvc_proc_lock_msg(struct svc_rqst *rqstp, struct nlm_args *argp,
+ void *resp)
+{
dprintk("lockd: LOCK_MSG called\n");
- memset(&res, 0, sizeof(res));
-
- if ((stat = nlmsvc_proc_lock(rqstp, argp, &res)) == 0)
- stat = nlmsvc_callback(rqstp, NLMPROC_LOCK_RES, &res);
- return stat;
+ return nlmsvc_callback(rqstp, NLMPROC_LOCK_RES, argp, nlmsvc_proc_lock);
}
-static int
-nlmsvc_proc_cancel_msg(struct svc_rqst *rqstp, struct nlm_args *argp,
+static __be32 nlmsvc_proc_cancel_msg(struct svc_rqst *rqstp, struct nlm_args *argp,
void *resp)
{
- struct nlm_res res;
- u32 stat;
-
dprintk("lockd: CANCEL_MSG called\n");
- memset(&res, 0, sizeof(res));
-
- if ((stat = nlmsvc_proc_cancel(rqstp, argp, &res)) == 0)
- stat = nlmsvc_callback(rqstp, NLMPROC_CANCEL_RES, &res);
- return stat;
+ return nlmsvc_callback(rqstp, NLMPROC_CANCEL_RES, argp, nlmsvc_proc_cancel);
}
-static int
+static __be32
nlmsvc_proc_unlock_msg(struct svc_rqst *rqstp, struct nlm_args *argp,
void *resp)
{
- struct nlm_res res;
- u32 stat;
-
dprintk("lockd: UNLOCK_MSG called\n");
- memset(&res, 0, sizeof(res));
-
- if ((stat = nlmsvc_proc_unlock(rqstp, argp, &res)) == 0)
- stat = nlmsvc_callback(rqstp, NLMPROC_UNLOCK_RES, &res);
- return stat;
+ return nlmsvc_callback(rqstp, NLMPROC_UNLOCK_RES, argp, nlmsvc_proc_unlock);
}
-static int
+static __be32
nlmsvc_proc_granted_msg(struct svc_rqst *rqstp, struct nlm_args *argp,
void *resp)
{
- struct nlm_res res;
- u32 stat;
-
dprintk("lockd: GRANTED_MSG called\n");
- memset(&res, 0, sizeof(res));
-
- if ((stat = nlmsvc_proc_granted(rqstp, argp, &res)) == 0)
- stat = nlmsvc_callback(rqstp, NLMPROC_GRANTED_RES, &res);
- return stat;
+ return nlmsvc_callback(rqstp, NLMPROC_GRANTED_RES, argp, nlmsvc_proc_granted);
}
/*
* SHARE: create a DOS share or alter existing share.
*/
-static int
+static __be32
nlmsvc_proc_share(struct svc_rqst *rqstp, struct nlm_args *argp,
struct nlm_res *resp)
{
resp->cookie = argp->cookie;
/* Don't accept new lock requests during grace period */
- if (nlmsvc_grace_period && !argp->reclaim) {
+ if (locks_in_grace() && !argp->reclaim) {
resp->status = nlm_lck_denied_grace_period;
return rpc_success;
}
/* Obtain client and file */
if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
- return rpc_success;
+ return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
/* Now try to create the share */
resp->status = cast_status(nlmsvc_share_file(host, file, argp));
/*
* UNSHARE: Release a DOS share.
*/
-static int
+static __be32
nlmsvc_proc_unshare(struct svc_rqst *rqstp, struct nlm_args *argp,
struct nlm_res *resp)
{
resp->cookie = argp->cookie;
/* Don't accept requests during grace period */
- if (nlmsvc_grace_period) {
+ if (locks_in_grace()) {
resp->status = nlm_lck_denied_grace_period;
return rpc_success;
}
/* Obtain client and file */
if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
- return rpc_success;
+ return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
/* Now try to unshare the file */
resp->status = cast_status(nlmsvc_unshare_file(host, file, argp));
/*
* NM_LOCK: Create an unmonitored lock
*/
-static int
+static __be32
nlmsvc_proc_nm_lock(struct svc_rqst *rqstp, struct nlm_args *argp,
struct nlm_res *resp)
{
/*
* FREE_ALL: Release all locks and shares held by client
*/
-static int
+static __be32
nlmsvc_proc_free_all(struct svc_rqst *rqstp, struct nlm_args *argp,
void *resp)
{
/*
* SM_NOTIFY: private callback from statd (not part of official NLM proto)
*/
-static int
+static __be32
nlmsvc_proc_sm_notify(struct svc_rqst *rqstp, struct nlm_reboot *argp,
void *resp)
{
- struct sockaddr_in saddr = rqstp->rq_addr;
- int vers = argp->vers;
- int prot = argp->proto >> 1;
- struct nlm_host *host;
-
dprintk("lockd: SM_NOTIFY called\n");
- if (saddr.sin_addr.s_addr != htonl(INADDR_LOOPBACK)
- || ntohs(saddr.sin_port) >= 1024) {
- printk(KERN_WARNING
- "lockd: rejected NSM callback from %08x:%d\n",
- ntohl(rqstp->rq_addr.sin_addr.s_addr),
- ntohs(rqstp->rq_addr.sin_port));
- return rpc_system_err;
- }
- /* Obtain the host pointer for this NFS server and try to
- * reclaim all locks we hold on this server.
- */
- saddr.sin_addr.s_addr = argp->addr;
- if ((argp->proto & 1)==0) {
- if ((host = nlmclnt_lookup_host(&saddr, prot, vers)) != NULL) {
- nlmclnt_recovery(host, argp->state);
- nlm_release_host(host);
- }
- } else {
- /* If we run on an NFS server, delete all locks held by the client */
- if ((host = nlm_lookup_host(1, &saddr, prot, vers)) != NULL) {
- nlmsvc_free_host_resources(host);
- nlm_release_host(host);
- }
+ if (!nlm_privileged_requester(rqstp)) {
+ char buf[RPC_MAX_ADDRBUFLEN];
+ printk(KERN_WARNING "lockd: rejected NSM callback from %s\n",
+ svc_print_addr(rqstp, buf, sizeof(buf)));
+ return rpc_system_err;
}
+ nlm_host_rebooted(argp);
return rpc_success;
}
/*
* client sent a GRANTED_RES, let's remove the associated block
*/
-static int
+static __be32
nlmsvc_proc_granted_res(struct svc_rqst *rqstp, struct nlm_res *argp,
void *resp)
{
dprintk("lockd: GRANTED_RES called\n");
- nlmsvc_grant_reply(rqstp, &argp->cookie, argp->status);
+ nlmsvc_grant_reply(&argp->cookie, argp->status);
return rpc_success;
}
/*
- * This is the generic lockd callback for async RPC calls
- */
-static u32
-nlmsvc_callback(struct svc_rqst *rqstp, u32 proc, struct nlm_res *resp)
-{
- struct nlm_host *host;
- struct nlm_rqst *call;
-
- if (!(call = nlmclnt_alloc_call()))
- return rpc_system_err;
-
- host = nlmclnt_lookup_host(&rqstp->rq_addr,
- rqstp->rq_prot, rqstp->rq_vers);
- if (!host) {
- kfree(call);
- return rpc_system_err;
- }
-
- call->a_flags = RPC_TASK_ASYNC;
- call->a_host = host;
- memcpy(&call->a_args, resp, sizeof(*resp));
-
- if (nlmsvc_async_call(call, proc, &nlmsvc_callback_ops) < 0)
- goto error;
-
- return rpc_success;
- error:
- nlm_release_host(host);
- kfree(call);
- return rpc_system_err;
-}
-
-static void nlmsvc_callback_exit(struct rpc_task *task, void *data)
-{
- struct nlm_rqst *call = data;
-
- if (task->tk_status < 0) {
- dprintk("lockd: %4d callback failed (errno = %d)\n",
- task->tk_pid, -task->tk_status);
- }
- nlm_release_host(call->a_host);
- kfree(call);
-}
-
-static const struct rpc_call_ops nlmsvc_callback_ops = {
- .rpc_call_done = nlmsvc_callback_exit,
-};
-
-/*
* NLM Server procedures.
*/
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff