diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
---|---|---|
committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /fs/afs/server.h |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'fs/afs/server.h')
-rw-r--r-- | fs/afs/server.h | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/fs/afs/server.h b/fs/afs/server.h new file mode 100644 index 000000000000..c3d24115578f --- /dev/null +++ b/fs/afs/server.h @@ -0,0 +1,102 @@ +/* server.h: AFS server record + * + * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved. + * Written by David Howells (dhowells@redhat.com) + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + */ + +#ifndef _LINUX_AFS_SERVER_H +#define _LINUX_AFS_SERVER_H + +#include "types.h" +#include "kafstimod.h" +#include <rxrpc/peer.h> +#include <linux/rwsem.h> + +extern spinlock_t afs_server_peer_lock; + +/*****************************************************************************/ +/* + * AFS server record + */ +struct afs_server +{ + atomic_t usage; + struct afs_cell *cell; /* cell in which server resides */ + struct list_head link; /* link in cell's server list */ + struct rw_semaphore sem; /* access lock */ + struct afs_timer timeout; /* graveyard timeout */ + struct in_addr addr; /* server address */ + struct rxrpc_peer *peer; /* peer record for this server */ + struct rxrpc_connection *vlserver; /* connection to the volume location service */ + + /* file service access */ +#define AFS_SERVER_CONN_LIST_SIZE 2 + struct rxrpc_connection *fs_conn[AFS_SERVER_CONN_LIST_SIZE]; /* FS connections */ + unsigned fs_conn_cnt[AFS_SERVER_CONN_LIST_SIZE]; /* per conn call count */ + struct list_head fs_callq; /* queue of processes waiting to make a call */ + spinlock_t fs_lock; /* access lock */ + int fs_state; /* 0 or reason FS currently marked dead (-errno) */ + unsigned fs_rtt; /* FS round trip time */ + unsigned long fs_act_jif; /* time at which last activity occurred */ + unsigned long fs_dead_jif; /* time at which no longer to be considered dead */ + + /* callback promise management */ + struct list_head cb_promises; /* as yet unbroken promises from this server */ + spinlock_t cb_lock; /* access lock */ +}; + +extern int afs_server_lookup(struct afs_cell *cell, + const struct in_addr *addr, + struct afs_server **_server); + +#define afs_get_server(S) do { atomic_inc(&(S)->usage); } while(0) + +extern void afs_put_server(struct afs_server *server); +extern void afs_server_do_timeout(struct afs_server *server); + +extern int afs_server_find_by_peer(const struct rxrpc_peer *peer, + struct afs_server **_server); + +extern int afs_server_get_vlconn(struct afs_server *server, + struct rxrpc_connection **_conn); + +static inline +struct afs_server *afs_server_get_from_peer(struct rxrpc_peer *peer) +{ + struct afs_server *server; + + spin_lock(&afs_server_peer_lock); + server = peer->user; + if (server) + afs_get_server(server); + spin_unlock(&afs_server_peer_lock); + + return server; +} + +/*****************************************************************************/ +/* + * AFS server callslot grant record + */ +struct afs_server_callslot +{ + struct list_head link; /* link in server's list */ + struct task_struct *task; /* process waiting to make call */ + struct rxrpc_connection *conn; /* connection to use (or NULL on error) */ + short nconn; /* connection slot number (-1 on error) */ + char ready; /* T when ready */ + int errno; /* error number if nconn==-1 */ +}; + +extern int afs_server_request_callslot(struct afs_server *server, + struct afs_server_callslot *callslot); + +extern void afs_server_release_callslot(struct afs_server *server, + struct afs_server_callslot *callslot); + +#endif /* _LINUX_AFS_SERVER_H */ |