pnfs: Fix manipulation of NFS_LAYOUT_FIRST_LAYOUTGET

The flag was not always being cleared after LAYOUTGET on OPEN.
Signed-off-by: NFred Isaman <fred.isaman@gmail.com>
Signed-off-by: NTrond Myklebust <trond.myklebust@hammerspace.com>

fs/nfs/nfs4proc.c

@@ -1249,8 +1249,7 @@ static void nfs4_opendata_free(struct kref *kref)
 			struct nfs4_opendata, kref);
 	struct super_block *sb = p->dentry->d_sb;
 
-	if (p->lgp)
-		nfs4_layoutget_release(p->lgp);
+	nfs4_lgopen_release(p->lgp);
 	nfs_free_seqid(p->o_arg.seqid);
 	nfs4_sequence_free_slot(&p->o_res.seq_res);
 	if (p->state != NULL)

fs/nfs/pnfs.c

@@ -2129,13 +2129,11 @@ void pnfs_parse_lgopen(struct inode *ino, struct nfs4_layoutget *lgp,
 		lgp->args.inode = ino;
 	} else
 		lo = NFS_I(lgp->args.inode)->layout;
-	pnfs_get_layout_hdr(lo);
 
 	if (read_seqcount_retry(&srv->nfs_client->cl_callback_count,
 				lgp->callback_count))
-		goto out;
+		return;
 	lseg = pnfs_layout_process(lgp);
-	atomic_dec(&lo->plh_outstanding);
 	if (IS_ERR(lseg)) {
 		/* ignore lseg, but would like to mark not to try lgopen */
 		/* clear some lo flags - first and fail ???? */
@@ -2144,9 +2142,19 @@ void pnfs_parse_lgopen(struct inode *ino, struct nfs4_layoutget *lgp,
 		pnfs_layout_clear_fail_bit(lo, pnfs_iomode_to_fail_bit(iomode));
 		pnfs_put_lseg(lseg);
 	}
-out:
-	pnfs_clear_first_layoutget(lo);
-	pnfs_put_layout_hdr(lo);
+}
+
+void nfs4_lgopen_release(struct nfs4_layoutget *lgp)
+{
+	if (lgp != NULL) {
+		struct inode *inode = lgp->args.inode;
+		if (inode) {
+			struct pnfs_layout_hdr *lo = NFS_I(inode)->layout;
+			atomic_dec(&lo->plh_outstanding);
+			pnfs_clear_first_layoutget(lo);
+		}
+		pnfs_layoutget_free(lgp);
+	}
 }
 
 struct pnfs_layout_segment *

fs/nfs/pnfs.h

@@ -384,6 +384,7 @@ void pnfs_lgopen_prepare(struct nfs4_opendata *data,
 			 struct nfs_open_context *ctx);
 void pnfs_parse_lgopen(struct inode *ino, struct nfs4_layoutget *lgp,
 		       struct nfs_open_context *ctx);
+void nfs4_lgopen_release(struct nfs4_layoutget *lgp);
 
 static inline bool nfs_have_layout(struct inode *inode)
 {
@@ -795,6 +796,11 @@ static inline void pnfs_parse_lgopen(struct inode *ino,
 		struct nfs_open_context *ctx)
 {
 }
+
+static inline void nfs4_lgopen_release(struct nfs4_layoutget *lgp)
+{
+}
+
 #endif /* CONFIG_NFS_V4_1 */
 
 #if IS_ENABLED(CONFIG_NFS_V4_2)