static void nlmclnt_rpc_release(void *data)
{
+ lock_kernel();
nlm_release_call(data);
+ unlock_kernel();
}
static int nlm_wait_on_grace(wait_queue_head_t *queue)
* Generic NLM call
*/
static int
-nlmclnt_call(struct nlm_rqst *req, u32 proc)
+nlmclnt_call(struct rpc_cred *cred, struct nlm_rqst *req, u32 proc)
{
struct nlm_host *host = req->a_host;
struct rpc_clnt *clnt;
struct rpc_message msg = {
.rpc_argp = argp,
.rpc_resp = resp,
+ .rpc_cred = cred,
};
int status;
* completion in order to be able to correctly track the lock
* state.
*/
-static int nlmclnt_async_call(struct nlm_rqst *req, u32 proc, const struct rpc_call_ops *tk_ops)
+static int nlmclnt_async_call(struct rpc_cred *cred, struct nlm_rqst *req, u32 proc, const struct rpc_call_ops *tk_ops)
{
struct rpc_message msg = {
.rpc_argp = &req->a_args,
.rpc_resp = &req->a_res,
+ .rpc_cred = cred,
};
struct rpc_task *task;
int err;
{
int status;
- status = nlmclnt_call(req, NLMPROC_TEST);
+ status = nlmclnt_call(nfs_file_cred(fl->fl_file), req, NLMPROC_TEST);
if (status < 0)
goto out;
* Report the conflicting lock back to the application.
*/
fl->fl_start = req->a_res.lock.fl.fl_start;
- fl->fl_end = req->a_res.lock.fl.fl_start;
+ fl->fl_end = req->a_res.lock.fl.fl_end;
fl->fl_type = req->a_res.lock.fl.fl_type;
fl->fl_pid = 0;
break;
static int
nlmclnt_lock(struct nlm_rqst *req, struct file_lock *fl)
{
+ struct rpc_cred *cred = nfs_file_cred(fl->fl_file);
struct nlm_host *host = req->a_host;
struct nlm_res *resp = &req->a_res;
struct nlm_wait *block = NULL;
unsigned char fl_flags = fl->fl_flags;
+ unsigned char fl_type;
int status = -ENOLCK;
if (nsm_monitor(host) < 0) {
block = nlmclnt_prepare_block(host, fl);
again:
+ /*
+ * Initialise resp->status to a valid non-zero value,
+ * since 0 == nlm_lck_granted
+ */
+ resp->status = nlm_lck_blocked;
for(;;) {
/* Reboot protection */
fl->fl_u.nfs_fl.state = host->h_state;
- status = nlmclnt_call(req, NLMPROC_LOCK);
+ status = nlmclnt_call(cred, req, NLMPROC_LOCK);
if (status < 0)
- goto out_unblock;
- if (!req->a_args.block)
break;
/* Did a reclaimer thread notify us of a server reboot? */
if (resp->status == nlm_lck_denied_grace_period)
break;
/* Wait on an NLM blocking lock */
status = nlmclnt_block(block, req, NLMCLNT_POLL_TIMEOUT);
- /* if we were interrupted. Send a CANCEL request to the server
- * and exit
- */
if (status < 0)
- goto out_unblock;
+ break;
if (resp->status != nlm_lck_blocked)
break;
}
+ /* if we were interrupted while blocking, then cancel the lock request
+ * and exit
+ */
+ if (resp->status == nlm_lck_blocked) {
+ if (!req->a_args.block)
+ goto out_unlock;
+ if (nlmclnt_cancel(host, req->a_args.block, fl) == 0)
+ goto out_unblock;
+ }
+
if (resp->status == nlm_granted) {
down_read(&host->h_rwsem);
/* Check whether or not the server has rebooted */
/* Ensure the resulting lock will get added to granted list */
fl->fl_flags |= FL_SLEEP;
if (do_vfs_lock(fl) < 0)
- printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __FUNCTION__);
+ printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
up_read(&host->h_rwsem);
fl->fl_flags = fl_flags;
+ status = 0;
}
+ if (status < 0)
+ goto out_unlock;
status = nlm_stat_to_errno(resp->status);
out_unblock:
nlmclnt_finish_block(block);
- /* Cancel the blocked request if it is still pending */
- if (resp->status == nlm_lck_blocked)
- nlmclnt_cancel(host, req->a_args.block, fl);
out:
nlm_release_call(req);
return status;
+out_unlock:
+ /* Fatal error: ensure that we remove the lock altogether */
+ dprintk("lockd: lock attempt ended in fatal error.\n"
+ " Attempting to unlock.\n");
+ nlmclnt_finish_block(block);
+ fl_type = fl->fl_type;
+ fl->fl_type = F_UNLCK;
+ down_read(&host->h_rwsem);
+ do_vfs_lock(fl);
+ up_read(&host->h_rwsem);
+ fl->fl_type = fl_type;
+ fl->fl_flags = fl_flags;
+ nlmclnt_async_call(cred, req, NLMPROC_UNLOCK, &nlmclnt_unlock_ops);
+ return status;
}
/*
nlmclnt_setlockargs(req, fl);
req->a_args.reclaim = 1;
- if ((status = nlmclnt_call(req, NLMPROC_LOCK)) >= 0
- && req->a_res.status == nlm_granted)
+ status = nlmclnt_call(nfs_file_cred(fl->fl_file), req, NLMPROC_LOCK);
+ if (status >= 0 && req->a_res.status == nlm_granted)
return 0;
printk(KERN_WARNING "lockd: failed to reclaim lock for pid %d "
}
atomic_inc(&req->a_count);
- status = nlmclnt_async_call(req, NLMPROC_UNLOCK, &nlmclnt_unlock_ops);
+ status = nlmclnt_async_call(nfs_file_cred(fl->fl_file), req,
+ NLMPROC_UNLOCK, &nlmclnt_unlock_ops);
if (status < 0)
goto out;
die:
return;
retry_rebind:
+ lock_kernel();
nlm_rebind_host(req->a_host);
+ unlock_kernel();
retry_unlock:
rpc_restart_call(task);
}
static int nlmclnt_cancel(struct nlm_host *host, int block, struct file_lock *fl)
{
struct nlm_rqst *req;
+ int status;
+
+ dprintk("lockd: blocking lock attempt was interrupted by a signal.\n"
+ " Attempting to cancel lock.\n");
req = nlm_alloc_call(nlm_get_host(host));
if (!req)
nlmclnt_setlockargs(req, fl);
req->a_args.block = block;
- return nlmclnt_async_call(req, NLMPROC_CANCEL, &nlmclnt_cancel_ops);
+ atomic_inc(&req->a_count);
+ status = nlmclnt_async_call(nfs_file_cred(fl->fl_file), req,
+ NLMPROC_CANCEL, &nlmclnt_cancel_ops);
+ if (status == 0 && req->a_res.status == nlm_lck_denied)
+ status = -ENOLCK;
+ nlm_release_call(req);
+ return status;
}
static void nlmclnt_cancel_callback(struct rpc_task *task, void *data)
/* Don't ever retry more than 3 times */
if (req->a_retries++ >= NLMCLNT_MAX_RETRIES)
goto die;
+ lock_kernel();
nlm_rebind_host(req->a_host);
+ unlock_kernel();
rpc_restart_call(task);
rpc_delay(task, 30 * HZ);
}
projects / linux-2.6 / blobdiff