41 строка
1.5 KiB
ReStructuredText
41 строка
1.5 KiB
ReStructuredText
==================================
|
|
Administrative interfaces for nfsd
|
|
==================================
|
|
|
|
Note that normally these interfaces are used only by the utilities in
|
|
nfs-utils.
|
|
|
|
nfsd is controlled mainly by pseudofiles under the "nfsd" filesystem,
|
|
which is normally mounted at /proc/fs/nfsd/.
|
|
|
|
The server is always started by the first write of a nonzero value to
|
|
nfsd/threads.
|
|
|
|
Before doing that, NFSD can be told which sockets to listen on by
|
|
writing to nfsd/portlist; that write may be:
|
|
|
|
- an ascii-encoded file descriptor, which should refer to a
|
|
bound (and listening, for tcp) socket, or
|
|
- "transportname port", where transportname is currently either
|
|
"udp", "tcp", or "rdma".
|
|
|
|
If nfsd is started without doing any of these, then it will create one
|
|
udp and one tcp listener at port 2049 (see nfsd_init_socks).
|
|
|
|
On startup, nfsd and lockd grace periods start. nfsd is shut down by a write of
|
|
0 to nfsd/threads. All locks and state are thrown away at that point.
|
|
|
|
Between startup and shutdown, the number of threads may be adjusted up
|
|
or down by additional writes to nfsd/threads or by writes to
|
|
nfsd/pool_threads.
|
|
|
|
For more detail about files under nfsd/ and what they control, see
|
|
fs/nfsd/nfsctl.c; most of them have detailed comments.
|
|
|
|
Implementation notes
|
|
====================
|
|
|
|
Note that the rpc server requires the caller to serialize addition and
|
|
removal of listening sockets, and startup and shutdown of the server.
|
|
For nfsd this is done using nfsd_mutex.
|