diff options
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/filesystems/nfs/reexport.rst | 10 | ||||
| -rw-r--r-- | Documentation/netlink/specs/lockd.yaml | 45 |
2 files changed, 52 insertions, 3 deletions
diff --git a/Documentation/filesystems/nfs/reexport.rst b/Documentation/filesystems/nfs/reexport.rst index ff9ae4a46530a..044be965d75e2 100644 --- a/Documentation/filesystems/nfs/reexport.rst +++ b/Documentation/filesystems/nfs/reexport.rst @@ -26,9 +26,13 @@ Reboot recovery --------------- The NFS protocol's normal reboot recovery mechanisms don't work for the -case when the reexport server reboots. Clients will lose any locks -they held before the reboot, and further IO will result in errors. -Closing and reopening files should clear the errors. +case when the reexport server reboots because the source server has not +rebooted, and so it is not in grace. Since the source server is not in +grace, it cannot offer any guarantees that the file won't have been +changed between the locks getting lost and any attempt to recover them. +The same applies to delegations and any associated locks. Clients are +not allowed to get file locks or delegations from a reexport server, any +attempts will fail with operation not supported. Filehandle limits ----------------- diff --git a/Documentation/netlink/specs/lockd.yaml b/Documentation/netlink/specs/lockd.yaml new file mode 100644 index 0000000000000..bbd4da5fe54b8 --- /dev/null +++ b/Documentation/netlink/specs/lockd.yaml @@ -0,0 +1,45 @@ +# SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) + +name: lockd +protocol: genetlink +uapi-header: linux/lockd_netlink.h + +doc: lockd configuration over generic netlink + +attribute-sets: + - + name: server + attributes: + - + name: gracetime + type: u32 + - + name: tcp-port + type: u16 + - + name: udp-port + type: u16 + +operations: + list: + - + name: server-set + doc: set the lockd server parameters + attribute-set: server + flags: [ admin-perm ] + do: + request: + attributes: + - gracetime + - tcp-port + - udp-port + - + name: server-get + doc: get the lockd server parameters + attribute-set: server + do: + reply: + attributes: + - gracetime + - tcp-port + - udp-port |