1 files changed, 60 insertions, 75 deletions

diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 423fd6683f3a..7698172ac0c7 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -43,6 +43,7 @@
 #include <linux/sunrpc/addr.h>
 #include <linux/jhash.h>
 #include <linux/string_helpers.h>
+#include <linux/fsnotify.h>
 #include "xdr4.h"
 #include "xdr4cb.h"
 #include "vfs.h"
@@ -2352,6 +2353,10 @@ static int client_info_show(struct seq_file *m, void *v)
 	memcpy(&clid, &clp->cl_clientid, sizeof(clid));
 	seq_printf(m, "clientid: 0x%llx\n", clid);
 	seq_printf(m, "address: \"%pISpc\"\n", (struct sockaddr *)&clp->cl_addr);
+	if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags))
+		seq_puts(m, "status: confirmed\n");
+	else
+		seq_puts(m, "status: unconfirmed\n");
 	seq_printf(m, "name: ");
 	seq_quote_mem(m, clp->cl_name.data, clp->cl_name.len);
 	seq_printf(m, "\nminor version: %d\n", clp->cl_minorversion);
@@ -2702,6 +2707,7 @@ static struct nfs4_client *create_client(struct xdr_netobj name,
 	int ret;
 	struct net *net = SVC_NET(rqstp);
 	struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+	struct dentry *dentries[ARRAY_SIZE(client_files)];
 
 	clp = alloc_client(name);
 	if (clp == NULL)
@@ -2721,9 +2727,11 @@ static struct nfs4_client *create_client(struct xdr_netobj name,
 	memcpy(&clp->cl_addr, sa, sizeof(struct sockaddr_storage));
 	clp->cl_cb_session = NULL;
 	clp->net = net;
-	clp->cl_nfsd_dentry = nfsd_client_mkdir(nn, &clp->cl_nfsdfs,
-			clp->cl_clientid.cl_id - nn->clientid_base,
-			client_files);
+	clp->cl_nfsd_dentry = nfsd_client_mkdir(
+		nn, &clp->cl_nfsdfs,
+		clp->cl_clientid.cl_id - nn->clientid_base,
+		client_files, dentries);
+	clp->cl_nfsd_info_dentry = dentries[0];
 	if (!clp->cl_nfsd_dentry) {
 		free_client(clp);
 		return NULL;
@@ -2798,7 +2806,10 @@ move_to_confirmed(struct nfs4_client *clp)
 	list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]);
 	rb_erase(&clp->cl_namenode, &nn->unconf_name_tree);
 	add_clp_to_name_tree(clp, &nn->conf_name_tree);
-	set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags);
+	if (!test_and_set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags) &&
+	    clp->cl_nfsd_dentry &&
+	    clp->cl_nfsd_info_dentry)
+		fsnotify_dentry(clp->cl_nfsd_info_dentry, FS_MODIFY);
 	renew_client_locked(clp);
 }
 
@@ -2903,7 +2914,7 @@ out_err:
 static void
 nfsd4_store_cache_entry(struct nfsd4_compoundres *resp)
 {
-	struct xdr_buf *buf = resp->xdr.buf;
+	struct xdr_buf *buf = resp->xdr->buf;
 	struct nfsd4_slot *slot = resp->cstate.slot;
 	unsigned int base;
 
@@ -2973,7 +2984,7 @@ nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp,
 			 struct nfsd4_sequence *seq)
 {
 	struct nfsd4_slot *slot = resp->cstate.slot;
-	struct xdr_stream *xdr = &resp->xdr;
+	struct xdr_stream *xdr = resp->xdr;
 	__be32 *p;
 	__be32 status;
 
@@ -3708,7 +3719,7 @@ nfsd4_sequence(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 {
 	struct nfsd4_sequence *seq = &u->sequence;
 	struct nfsd4_compoundres *resp = rqstp->rq_resp;
-	struct xdr_stream *xdr = &resp->xdr;
+	struct xdr_stream *xdr = resp->xdr;
 	struct nfsd4_session *session;
 	struct nfs4_client *clp;
 	struct nfsd4_slot *slot;
@@ -4940,31 +4951,6 @@ static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp,
 	return fl;
 }
 
-static int nfsd4_check_conflicting_opens(struct nfs4_client *clp,
-						struct nfs4_file *fp)
-{
-	struct nfs4_clnt_odstate *co;
-	struct file *f = fp->fi_deleg_file->nf_file;
-	struct inode *ino = locks_inode(f);
-	int writes = atomic_read(&ino->i_writecount);
-
-	if (fp->fi_fds[O_WRONLY])
-		writes--;
-	if (fp->fi_fds[O_RDWR])
-		writes--;
-	if (writes > 0)
-		return -EAGAIN;
-	spin_lock(&fp->fi_lock);
-	list_for_each_entry(co, &fp->fi_clnt_odstate, co_perfile) {
-		if (co->co_client != clp) {
-			spin_unlock(&fp->fi_lock);
-			return -EAGAIN;
-		}
-	}
-	spin_unlock(&fp->fi_lock);
-	return 0;
-}
-
 static struct nfs4_delegation *
 nfs4_set_delegation(struct nfs4_client *clp, struct svc_fh *fh,
 		    struct nfs4_file *fp, struct nfs4_clnt_odstate *odstate)
@@ -4984,12 +4970,9 @@ nfs4_set_delegation(struct nfs4_client *clp, struct svc_fh *fh,
 
 	nf = find_readable_file(fp);
 	if (!nf) {
-		/*
-		 * We probably could attempt another open and get a read
-		 * delegation, but for now, don't bother until the
-		 * client actually sends us one.
-		 */
-		return ERR_PTR(-EAGAIN);
+		/* We should always have a readable file here */
+		WARN_ON_ONCE(1);
+		return ERR_PTR(-EBADF);
 	}
 	spin_lock(&state_lock);
 	spin_lock(&fp->fi_lock);
@@ -5019,19 +5002,11 @@ nfs4_set_delegation(struct nfs4_client *clp, struct svc_fh *fh,
 	if (!fl)
 		goto out_clnt_odstate;
 
-	status = nfsd4_check_conflicting_opens(clp, fp);
-	if (status) {
-		locks_free_lock(fl);
-		goto out_clnt_odstate;
-	}
 	status = vfs_setlease(fp->fi_deleg_file->nf_file, fl->fl_type, &fl, NULL);
 	if (fl)
 		locks_free_lock(fl);
 	if (status)
 		goto out_clnt_odstate;
-	status = nfsd4_check_conflicting_opens(clp, fp);
-	if (status)
-		goto out_clnt_odstate;
 
 	spin_lock(&state_lock);
 	spin_lock(&fp->fi_lock);
@@ -5113,6 +5088,17 @@ nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open,
 				goto out_no_deleg;
 			if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED))
 				goto out_no_deleg;
+			/*
+			 * Also, if the file was opened for write or
+			 * create, there's a good chance the client's
+			 * about to write to it, resulting in an
+			 * immediate recall (since we don't support
+			 * write delegations):
+			 */
+			if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
+				goto out_no_deleg;
+			if (open->op_create == NFS4_OPEN_CREATE)
+				goto out_no_deleg;
 			break;
 		default:
 			goto out_no_deleg;
@@ -5363,6 +5349,22 @@ static bool clients_still_reclaiming(struct nfsd_net *nn)
 	return true;
 }
 
+struct laundry_time {
+	time64_t cutoff;
+	time64_t new_timeo;
+};
+
+static bool state_expired(struct laundry_time *lt, time64_t last_refresh)
+{
+	time64_t time_remaining;
+
+	if (last_refresh < lt->cutoff)
+		return true;
+	time_remaining = last_refresh - lt->cutoff;
+	lt->new_timeo = min(lt->new_timeo, time_remaining);
+	return false;
+}
+
 static time64_t
 nfs4_laundromat(struct nfsd_net *nn)
 {
@@ -5372,14 +5374,16 @@ nfs4_laundromat(struct nfsd_net *nn)
 	struct nfs4_ol_stateid *stp;
 	struct nfsd4_blocked_lock *nbl;
 	struct list_head *pos, *next, reaplist;
-	time64_t cutoff = ktime_get_boottime_seconds() - nn->nfsd4_lease;
-	time64_t t, new_timeo = nn->nfsd4_lease;
+	struct laundry_time lt = {
+		.cutoff = ktime_get_boottime_seconds() - nn->nfsd4_lease,
+		.new_timeo = nn->nfsd4_lease
+	};
 	struct nfs4_cpntf_state *cps;
 	copy_stateid_t *cps_t;
 	int i;
 
 	if (clients_still_reclaiming(nn)) {
-		new_timeo = 0;
+		lt.new_timeo = 0;
 		goto out;
 	}
 	nfsd4_end_grace(nn);
@@ -5389,7 +5393,7 @@ nfs4_laundromat(struct nfsd_net *nn)
 	idr_for_each_entry(&nn->s2s_cp_stateids, cps_t, i) {
 		cps = container_of(cps_t, struct nfs4_cpntf_state, cp_stateid);
 		if (cps->cp_stateid.sc_type == NFS4_COPYNOTIFY_STID &&
-				cps->cpntf_time > cutoff)
+				state_expired(&lt, cps->cpntf_time))
 			_free_cpntf_state_locked(nn, cps);
 	}
 	spin_unlock(&nn->s2s_cp_lock);
@@ -5397,11 +5401,8 @@ nfs4_laundromat(struct nfsd_net *nn)
 	spin_lock(&nn->client_lock);
 	list_for_each_safe(pos, next, &nn->client_lru) {
 		clp = list_entry(pos, struct nfs4_client, cl_lru);
-		if (clp->cl_time > cutoff) {
-			t = clp->cl_time - cutoff;
-			new_timeo = min(new_timeo, t);
+		if (!state_expired(&lt, clp->cl_time))
 			break;
-		}
 		if (mark_client_expired_locked(clp)) {
 			trace_nfsd_clid_expired(&clp->cl_clientid);
 			continue;
@@ -5418,11 +5419,8 @@ nfs4_laundromat(struct nfsd_net *nn)
 	spin_lock(&state_lock);
 	list_for_each_safe(pos, next, &nn->del_recall_lru) {
 		dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
-		if (dp->dl_time > cutoff) {
-			t = dp->dl_time - cutoff;
-			new_timeo = min(new_timeo, t);
+		if (!state_expired(&lt, dp->dl_time))
 			break;
-		}
 		WARN_ON(!unhash_delegation_locked(dp));
 		list_add(&dp->dl_recall_lru, &reaplist);
 	}
@@ -5438,11 +5436,8 @@ nfs4_laundromat(struct nfsd_net *nn)
 	while (!list_empty(&nn->close_lru)) {
 		oo = list_first_entry(&nn->close_lru, struct nfs4_openowner,
 					oo_close_lru);
-		if (oo->oo_time > cutoff) {
-			t = oo->oo_time - cutoff;
-			new_timeo = min(new_timeo, t);
+		if (!state_expired(&lt, oo->oo_time))
 			break;
-		}
 		list_del_init(&oo->oo_close_lru);
 		stp = oo->oo_last_closed_stid;
 		oo->oo_last_closed_stid = NULL;
@@ -5468,11 +5463,8 @@ nfs4_laundromat(struct nfsd_net *nn)
 	while (!list_empty(&nn->blocked_locks_lru)) {
 		nbl = list_first_entry(&nn->blocked_locks_lru,
 					struct nfsd4_blocked_lock, nbl_lru);
-		if (nbl->nbl_time > cutoff) {
-			t = nbl->nbl_time - cutoff;
-			new_timeo = min(new_timeo, t);
+		if (!state_expired(&lt, nbl->nbl_time))
 			break;
-		}
 		list_move(&nbl->nbl_lru, &reaplist);
 		list_del_init(&nbl->nbl_list);
 	}
@@ -5485,8 +5477,7 @@ nfs4_laundromat(struct nfsd_net *nn)
 		free_blocked_lock(nbl);
 	}
 out:
-	new_timeo = max_t(time64_t, new_timeo, NFSD_LAUNDROMAT_MINTIMEOUT);
-	return new_timeo;
+	return max_t(time64_t, lt.new_timeo, NFSD_LAUNDROMAT_MINTIMEOUT);
 }
 
 static struct workqueue_struct *laundry_wq;
@@ -7346,14 +7337,9 @@ nfs4_state_start_net(struct net *net)
 	struct nfsd_net *nn = net_generic(net, nfsd_net_id);
 	int ret;
 
-	ret = get_nfsdfs(net);
-	if (ret)
-		return ret;
 	ret = nfs4_state_create_net(net);
-	if (ret) {
-		mntput(nn->nfsd_mnt);
+	if (ret)
 		return ret;
-	}
 	locks_start_grace(net, &nn->nfsd4_manager);
 	nfsd4_client_tracking_init(net);
 	if (nn->track_reclaim_completes && nn->reclaim_str_hashtbl_size == 0)
@@ -7423,7 +7409,6 @@ nfs4_state_shutdown_net(struct net *net)
 
 	nfsd4_client_tracking_exit(net);
 	nfs4_state_destroy_net(net);
-	mntput(nn->nfsd_mnt);
 }
 
 void