/*
* V9FS definitions.
*
- * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
+ * Copyright (C) 2004-2008 by Eric Van Hensbergen <ericvh@gmail.com>
* Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
*
* 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.
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
*
*/
-/*
- * Idpool structure provides lock and id management
- *
- */
-
-struct v9fs_idpool {
- struct semaphore lock;
- struct idr pool;
-};
-
/*
* Session structure provides information for an opened session
*
struct v9fs_session_info {
/* options */
- unsigned int maxdata;
- unsigned char extended; /* set to 1 if we are using UNIX extensions */
+ unsigned char flags; /* session flags */
unsigned char nodev; /* set to 1 if no disable device mapping */
- unsigned short port; /* port to connect to */
unsigned short debug; /* debug level */
- unsigned short proto; /* protocol to use */
unsigned int afid; /* authentication fid */
- unsigned int rfdno; /* read file descriptor number */
- unsigned int wfdno; /* write file descriptor number */
-
-
- char *name; /* user name to mount as */
- char *remotename; /* name of remote hierarchy being mounted */
- unsigned int uid; /* default uid/muid for legacy support */
- unsigned int gid; /* default gid for legacy support */
-
- /* book keeping */
- struct v9fs_idpool fidpool; /* The FID pool for file descriptors */
- struct v9fs_idpool tidpool; /* The TID pool for transactions ids */
-
- /* transport information */
- struct v9fs_transport *transport;
-
- int inprogress; /* session in progress => true */
- int shutdown; /* session shutting down. no more attaches. */
- unsigned char session_hung;
-
- /* mux private data */
- struct v9fs_fcall *curfcall;
- wait_queue_head_t read_wait;
- struct completion fcread;
- struct completion proccmpl;
- struct task_struct *recvproc;
+ unsigned int cache; /* cache mode */
+
+ char *options; /* copy of mount options */
+ char *uname; /* user name to mount as */
+ char *aname; /* name of remote hierarchy being mounted */
+ unsigned int maxdata; /* max data for client interface */
+ unsigned int dfltuid; /* default uid/muid for legacy support */
+ unsigned int dfltgid; /* default gid for legacy support */
+ u32 uid; /* if ACCESS_SINGLE, the uid that has access */
+ struct p9_client *clnt; /* 9p client */
+ struct dentry *debugfs_dir;
+};
- spinlock_t muxlock;
- struct list_head mux_fcalls;
+/* session flags */
+enum {
+ V9FS_EXTENDED = 0x01, /* 9P2000.u */
+ V9FS_ACCESS_MASK = 0x06, /* access mask */
+ V9FS_ACCESS_SINGLE = 0x02, /* only one user can access the files */
+ V9FS_ACCESS_USER = 0x04, /* attache per user */
+ V9FS_ACCESS_ANY = 0x06, /* use the same attach for all users */
};
-/* possible values of ->proto */
+/* possible values of ->cache */
+/* eventually support loose, tight, time, session, default always none */
enum {
- PROTO_TCP,
- PROTO_UNIX,
- PROTO_FD,
+ CACHE_NONE, /* default */
+ CACHE_LOOSE, /* no consistency */
};
-int v9fs_session_init(struct v9fs_session_info *, const char *, char *);
-struct v9fs_session_info *v9fs_inode2v9ses(struct inode *);
+extern struct dentry *v9fs_debugfs_root;
+
+struct p9_fid *v9fs_session_init(struct v9fs_session_info *, const char *,
+ char *);
void v9fs_session_close(struct v9fs_session_info *v9ses);
-int v9fs_get_idpool(struct v9fs_idpool *p);
-void v9fs_put_idpool(int id, struct v9fs_idpool *p);
void v9fs_session_cancel(struct v9fs_session_info *v9ses);
#define V9FS_MAGIC 0x01021997
/* other default globals */
-#define V9FS_PORT 564
+#define V9FS_PORT 564
#define V9FS_DEFUSER "nobody"
#define V9FS_DEFANAME ""
-
-/* inital pool sizes for fids and tags */
-#define V9FS_START_FIDS 8192
-#define V9FS_START_TIDS 256
+#define V9FS_DEFUID (-2)
+#define V9FS_DEFGID (-2)
+
+static inline struct v9fs_session_info *v9fs_inode2v9ses(struct inode *inode)
+{
+ return (inode->i_sb->s_fs_info);
+}
+
+static inline int v9fs_extended(struct v9fs_session_info *v9ses)
+{
+ return v9ses->flags & V9FS_EXTENDED;
+}