1 /* 2 * V9FS definitions. 3 * 4 * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com> 5 * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov> 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2 of the License, or 10 * (at your option) any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to: 19 * Free Software Foundation 20 * 51 Franklin Street, Fifth Floor 21 * Boston, MA 02111-1301 USA 22 * 23 */ 24 25 /* 26 * Idpool structure provides lock and id management 27 * 28 */ 29 30 struct v9fs_idpool { 31 struct semaphore lock; 32 struct idr pool; 33 }; 34 35 /* 36 * Session structure provides information for an opened session 37 * 38 */ 39 40 struct v9fs_session_info { 41 /* options */ 42 unsigned int maxdata; 43 unsigned char extended; /* set to 1 if we are using UNIX extensions */ 44 unsigned char nodev; /* set to 1 if no disable device mapping */ 45 unsigned short port; /* port to connect to */ 46 unsigned short debug; /* debug level */ 47 unsigned short proto; /* protocol to use */ 48 unsigned int afid; /* authentication fid */ 49 unsigned int rfdno; /* read file descriptor number */ 50 unsigned int wfdno; /* write file descriptor number */ 51 52 53 char *name; /* user name to mount as */ 54 char *remotename; /* name of remote hierarchy being mounted */ 55 unsigned int uid; /* default uid/muid for legacy support */ 56 unsigned int gid; /* default gid for legacy support */ 57 58 /* book keeping */ 59 struct v9fs_idpool fidpool; /* The FID pool for file descriptors */ 60 struct v9fs_idpool tidpool; /* The TID pool for transactions ids */ 61 62 /* transport information */ 63 struct v9fs_transport *transport; 64 65 int inprogress; /* session in progress => true */ 66 int shutdown; /* session shutting down. no more attaches. */ 67 unsigned char session_hung; 68 69 /* mux private data */ 70 struct v9fs_fcall *curfcall; 71 wait_queue_head_t read_wait; 72 struct completion fcread; 73 struct completion proccmpl; 74 struct task_struct *recvproc; 75 76 spinlock_t muxlock; 77 struct list_head mux_fcalls; 78 }; 79 80 /* possible values of ->proto */ 81 enum { 82 PROTO_TCP, 83 PROTO_UNIX, 84 PROTO_FD, 85 }; 86 87 int v9fs_session_init(struct v9fs_session_info *, const char *, char *); 88 struct v9fs_session_info *v9fs_inode2v9ses(struct inode *); 89 void v9fs_session_close(struct v9fs_session_info *v9ses); 90 int v9fs_get_idpool(struct v9fs_idpool *p); 91 void v9fs_put_idpool(int id, struct v9fs_idpool *p); 92 void v9fs_session_cancel(struct v9fs_session_info *v9ses); 93 94 #define V9FS_MAGIC 0x01021997 95 96 /* other default globals */ 97 #define V9FS_PORT 564 98 #define V9FS_DEFUSER "nobody" 99 #define V9FS_DEFANAME "" 100 101 /* inital pool sizes for fids and tags */ 102 #define V9FS_START_FIDS 8192 103 #define V9FS_START_TIDS 256 104