diff options
Diffstat (limited to 'sys/fs/nfsclient/nfs_clvfsops.c')
| -rw-r--r-- | sys/fs/nfsclient/nfs_clvfsops.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/sys/fs/nfsclient/nfs_clvfsops.c b/sys/fs/nfsclient/nfs_clvfsops.c index ccb35f1..5ddfa27 100644 --- a/sys/fs/nfsclient/nfs_clvfsops.c +++ b/sys/fs/nfsclient/nfs_clvfsops.c @@ -989,6 +989,23 @@ 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 version, * security, switch lockd strategies or change cookie |
