2 * include/net/9p/client.h
4 * 9P Client Definitions
6 * Copyright (C) 2008 by Eric Van Hensbergen <ericvh@gmail.com>
7 * Copyright (C) 2007 by Latchesar Ionkov <lucho@ionkov.net>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2
11 * as published by the Free Software Foundation.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to:
20 * Free Software Foundation
21 * 51 Franklin Street, Fifth Floor
22 * Boston, MA 02111-1301 USA
26 #ifndef NET_9P_CLIENT_H
27 #define NET_9P_CLIENT_H
30 * struct p9_client - per client instance state
31 * @lock: protect @fidlist
32 * @msize: maximum data size negotiated by protocol
33 * @dotu: extension flags negotiated by protocol
34 * @trans_mod: module API instantiated with this client
35 * @trans: tranport instance state and API
36 * @conn: connection state information used by trans_fd
37 * @fidpool: fid handle accounting for session
38 * @fidlist: List of active fid handles
40 * The client structure is used to keep track of various per-client
41 * state that has been instantiated.
43 * Bugs: duplicated data and potentially unnecessary elements.
47 spinlock_t lock; /* protect client structure */
50 struct p9_trans_module *trans_mod;
51 struct p9_trans *trans;
54 struct p9_idpool *fidpool;
55 struct list_head fidlist;
59 * struct p9_fid - file system entity handle
60 * @clnt: back pointer to instantiating &p9_client
61 * @fid: numeric identifier for this handle
62 * @mode: current mode of this fid (enum?)
63 * @qid: the &p9_qid server identifier this handle points to
64 * @iounit: the server reported maximum transaction size for this file
65 * @uid: the numeric uid of the local user who owns this handle
66 * @aux: transport specific information (unused?)
67 * @rdir_fpos: tracks offset of file position when reading directory contents
68 * @rdir_pos: (unused?)
69 * @rdir_fcall: holds response of last directory read request
70 * @flist: per-client-instance fid tracking
71 * @dlist: per-dentry fid tracking
73 * TODO: This needs lots of explanation.
77 struct p9_client *clnt;
87 struct p9_fcall *rdir_fcall;
88 struct list_head flist;
89 struct list_head dlist; /* list of all fids attached to a dentry */
92 struct p9_client *p9_client_create(const char *dev_name, char *options);
93 void p9_client_destroy(struct p9_client *clnt);
94 void p9_client_disconnect(struct p9_client *clnt);
95 struct p9_fid *p9_client_attach(struct p9_client *clnt, struct p9_fid *afid,
96 char *uname, u32 n_uname, char *aname);
97 struct p9_fid *p9_client_auth(struct p9_client *clnt, char *uname,
98 u32 n_uname, char *aname);
99 struct p9_fid *p9_client_walk(struct p9_fid *oldfid, int nwname, char **wnames,
101 int p9_client_open(struct p9_fid *fid, int mode);
102 int p9_client_fcreate(struct p9_fid *fid, char *name, u32 perm, int mode,
104 int p9_client_clunk(struct p9_fid *fid);
105 int p9_client_remove(struct p9_fid *fid);
106 int p9_client_read(struct p9_fid *fid, char *data, u64 offset, u32 count);
107 int p9_client_readn(struct p9_fid *fid, char *data, u64 offset, u32 count);
108 int p9_client_write(struct p9_fid *fid, char *data, u64 offset, u32 count);
109 int p9_client_uread(struct p9_fid *fid, char __user *data, u64 offset,
111 int p9_client_uwrite(struct p9_fid *fid, const char __user *data, u64 offset,
113 struct p9_stat *p9_client_stat(struct p9_fid *fid);
114 int p9_client_wstat(struct p9_fid *fid, struct p9_wstat *wst);
115 struct p9_stat *p9_client_dirread(struct p9_fid *fid, u64 offset);
117 #endif /* NET_9P_CLIENT_H */