[PATCH] v9fs: VFS superblock operations and glue
This part of the patch contains VFS superblock and mapping code.
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/fs/9p/v9fs.h b/fs/9p/v9fs.h
new file mode 100644
index 0000000..5220302
--- /dev/null
+++ b/fs/9p/v9fs.h
@@ -0,0 +1,105 @@
+/*
+ * V9FS definitions.
+ *
+ * Copyright (C) 2004 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to:
+ * Free Software Foundation
+ * 51 Franklin Street, Fifth Floor
+ * Boston, MA 02111-1301 USA
+ *
+ */
+
+/*
+ * 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 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;
+
+ spinlock_t muxlock;
+ struct list_head mux_fcalls;
+};
+
+/* possible values of ->proto */
+enum {
+ PROTO_TCP,
+ PROTO_UNIX,
+ PROTO_FD,
+};
+
+int v9fs_session_init(struct v9fs_session_info *, const char *, char *);
+struct v9fs_session_info *v9fs_inode2v9ses(struct inode *);
+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);
+int v9fs_get_option(char *opts, char *name, char *buf, int buflen);
+long long v9fs_get_int_option(char *opts, char *name, long long dflt);
+int v9fs_parse_tcp_devname(const char *devname, char **addr, char **remotename);
+
+#define V9FS_MAGIC 0x01021997
+
+/* other default globals */
+#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