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[[!meta copyright="Copyright © 2009 Free Software Foundation, Inc."]]
[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable
id="license" text="Permission is granted to copy, distribute and/or modify this
document under the terms of the GNU Free Documentation License, Version 1.2 or
any later version published by the Free Software Foundation; with no Invariant
Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license
is included in the section entitled [[GNU Free Documentation
License|/fdl]]."]]"""]]
[[!meta title="fsys_syncfs"]]
routine fsys_syncfs (
fsys: fsys_t;
RPT
wait: int;
do_children: int);
Synchronize the entire filesystem.
This function has a companion in [[`file_syncfs`|file_syncfs]], which is
invoked on an arbitrary node instead of the server's control port. Both of
them are usually implemented in equivalent ways.
# Implementation Examples
Servers that either don't keep any unsynchronized state (or don't have a
backing store at all) can simply `return 0`. Examples: [[translator/symlink]],
[[translator/nfs]].
## [[libtrivfs]]
Invoke [[`file_sync`|file_sync]] on the underlying node. Rationale: the
underlying node represents this filesystem's backend, and once this node is
synchronized, the whole [[libtrivfs]]-based filesystem is to be considered
synchronized.
### [[storeio]] / [[streamio]]
Instead of to the underlying node, pass the call through to the backend
(device).
## [[libnetfs]]
Invoke `netfs_attempt_syncfs`.
## [[libdiskfs]]
Invoke [[`fsys_syncfs`|fsys_syncfs]] on all active children, and invoke
`diskfs_sync_everything` and `diskfs_set_hypermetadata`.
# Usage Examples
## [[libdiskfs]]
In the implementations of both [[`file_syncfs`|file_syncfs]] and
[[`fsys_syncfs`|fsys_syncfs]], [[`fsys_syncfs`|fsys_syncfs]] is invoked on all
active children.
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