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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>
106 lines
3.2 KiB
C
106 lines
3.2 KiB
C
/*
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* V9FS definitions.
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*
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* Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
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* Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to:
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* Free Software Foundation
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* 51 Franklin Street, Fifth Floor
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* Boston, MA 02111-1301 USA
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*
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*/
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/*
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* Idpool structure provides lock and id management
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*
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*/
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struct v9fs_idpool {
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struct semaphore lock;
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struct idr pool;
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};
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/*
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* Session structure provides information for an opened session
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*
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*/
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struct v9fs_session_info {
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/* options */
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unsigned int maxdata;
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unsigned char extended; /* set to 1 if we are using UNIX extensions */
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unsigned char nodev; /* set to 1 if no disable device mapping */
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unsigned short port; /* port to connect to */
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unsigned short debug; /* debug level */
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unsigned short proto; /* protocol to use */
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unsigned int afid; /* authentication fid */
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unsigned int rfdno; /* read file descriptor number */
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unsigned int wfdno; /* write file descriptor number */
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char *name; /* user name to mount as */
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char *remotename; /* name of remote hierarchy being mounted */
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unsigned int uid; /* default uid/muid for legacy support */
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unsigned int gid; /* default gid for legacy support */
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/* book keeping */
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struct v9fs_idpool fidpool; /* The FID pool for file descriptors */
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struct v9fs_idpool tidpool; /* The TID pool for transactions ids */
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/* transport information */
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struct v9fs_transport *transport;
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int inprogress; /* session in progress => true */
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int shutdown; /* session shutting down. no more attaches. */
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unsigned char session_hung;
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/* mux private data */
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struct v9fs_fcall *curfcall;
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wait_queue_head_t read_wait;
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struct completion fcread;
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struct completion proccmpl;
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struct task_struct *recvproc;
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spinlock_t muxlock;
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struct list_head mux_fcalls;
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};
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/* possible values of ->proto */
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enum {
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PROTO_TCP,
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PROTO_UNIX,
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PROTO_FD,
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};
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int v9fs_session_init(struct v9fs_session_info *, const char *, char *);
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struct v9fs_session_info *v9fs_inode2v9ses(struct inode *);
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void v9fs_session_close(struct v9fs_session_info *v9ses);
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int v9fs_get_idpool(struct v9fs_idpool *p);
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void v9fs_put_idpool(int id, struct v9fs_idpool *p);
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int v9fs_get_option(char *opts, char *name, char *buf, int buflen);
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long long v9fs_get_int_option(char *opts, char *name, long long dflt);
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int v9fs_parse_tcp_devname(const char *devname, char **addr, char **remotename);
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#define V9FS_MAGIC 0x01021997
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/* other default globals */
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#define V9FS_PORT 564
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#define V9FS_DEFUSER "nobody"
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#define V9FS_DEFANAME ""
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/* inital pool sizes for fids and tags */
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#define V9FS_START_FIDS 8192
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#define V9FS_START_TIDS 256
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