fuse: fix fuse_write_end() if zero bytes were copied

[firefly-linux-kernel-4.4.55.git] / fs / nfs / pnfs.c

diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index 5a8ae2125b50855d6f9f304ffd737fbbb57bb02a..5cd3568eea063a42812c03324acddfb5833975fd 100644 (file)
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -365,6 +365,9 @@ pnfs_layout_need_return(struct pnfs_layout_hdr *lo,
 static bool
 pnfs_prepare_layoutreturn(struct pnfs_layout_hdr *lo)
 {
+       /* Serialise LAYOUTGET/LAYOUTRETURN */
+       if (atomic_read(&lo->plh_outstanding) != 0)
+               return false;
        if (test_and_set_bit(NFS_LAYOUT_RETURN, &lo->plh_flags))
                return false;
        lo->plh_return_iomode = 0;
@@ -1466,11 +1469,11 @@ static bool pnfs_within_mdsthreshold(struct nfs_open_context *ctx,
 }
 
 /* stop waiting if someone clears NFS_LAYOUT_RETRY_LAYOUTGET bit. */
-static int pnfs_layoutget_retry_bit_wait(struct wait_bit_key *key)
+static int pnfs_layoutget_retry_bit_wait(struct wait_bit_key *key, int mode)
 {
        if (!test_bit(NFS_LAYOUT_RETRY_LAYOUTGET, key->flags))
                return 1;
-       return nfs_wait_bit_killable(key);
+       return nfs_wait_bit_killable(key, mode);
 }
 
 static bool pnfs_prepare_to_retry_layoutget(struct pnfs_layout_hdr *lo)
@@ -1530,6 +1533,7 @@ pnfs_update_layout(struct inode *ino,
                goto out;
 
 lookup_again:
+       nfs4_client_recover_expired_lease(clp);
        first = false;
        spin_lock(&ino->i_lock);
        lo = pnfs_find_alloc_layout(ino, ctx, gfp_flags);