diff options
Diffstat (limited to 'sys/nfsclient')
| -rw-r--r-- | sys/nfsclient/nfs_vfsops.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/sys/nfsclient/nfs_vfsops.c b/sys/nfsclient/nfs_vfsops.c index fafc253..e43c048 100644 --- a/sys/nfsclient/nfs_vfsops.c +++ b/sys/nfsclient/nfs_vfsops.c @@ -1106,6 +1106,23 @@ nfs_mount(struct mount *mp) error = EIO; goto out; } + + /* + * Cannot switch to UDP if current rsize/wsize/readdirsize is + * too large, since there may be an I/O RPC in progress that + * will get retried after the switch to the UDP socket. These + * retries will fail over and over and over again. + */ + if (args.sotype == SOCK_DGRAM && + (nmp->nm_rsize > NFS_MAXDGRAMDATA || + nmp->nm_wsize > NFS_MAXDGRAMDATA || + nmp->nm_readdirsize > NFS_MAXDGRAMDATA)) { + vfs_mount_error(mp, + "old rsize/wsize/readdirsize greater than UDP max"); + error = EINVAL; + goto out; + } + /* * When doing an update, we can't change from or to * v3, switch lockd strategies or change cookie translation |
