/* * linux/fs/9p/9p.h * * 9P protocol definitions. * * Copyright (C) 2004 by Eric Van Hensbergen * Copyright (C) 2002 by Ron Minnich * * 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 * */ /* Message Types */ enum { TVERSION = 100, RVERSION, TAUTH = 102, RAUTH, TATTACH = 104, RATTACH, TERROR = 106, RERROR, TFLUSH = 108, RFLUSH, TWALK = 110, RWALK, TOPEN = 112, ROPEN, TCREATE = 114, RCREATE, TREAD = 116, RREAD, TWRITE = 118, RWRITE, TCLUNK = 120, RCLUNK, TREMOVE = 122, RREMOVE, TSTAT = 124, RSTAT, TWSTAT = 126, RWSTAT, }; /* modes */ enum { V9FS_OREAD = 0x00, V9FS_OWRITE = 0x01, V9FS_ORDWR = 0x02, V9FS_OEXEC = 0x03, V9FS_OEXCL = 0x04, V9FS_OTRUNC = 0x10, V9FS_OREXEC = 0x20, V9FS_ORCLOSE = 0x40, V9FS_OAPPEND = 0x80, }; /* permissions */ enum { V9FS_DMDIR = 0x80000000, V9FS_DMAPPEND = 0x40000000, V9FS_DMEXCL = 0x20000000, V9FS_DMMOUNT = 0x10000000, V9FS_DMAUTH = 0x08000000, V9FS_DMTMP = 0x04000000, V9FS_DMSYMLINK = 0x02000000, V9FS_DMLINK = 0x01000000, /* 9P2000.u extensions */ V9FS_DMDEVICE = 0x00800000, V9FS_DMNAMEDPIPE = 0x00200000, V9FS_DMSOCKET = 0x00100000, V9FS_DMSETUID = 0x00080000, V9FS_DMSETGID = 0x00040000, }; /* qid.types */ enum { V9FS_QTDIR = 0x80, V9FS_QTAPPEND = 0x40, V9FS_QTEXCL = 0x20, V9FS_QTMOUNT = 0x10, V9FS_QTAUTH = 0x08, V9FS_QTTMP = 0x04, V9FS_QTSYMLINK = 0x02, V9FS_QTLINK = 0x01, V9FS_QTFILE = 0x00, }; /* ample room for Twrite/Rread header (iounit) */ #define V9FS_IOHDRSZ 24 /* qids are the unique ID for a file (like an inode */ struct v9fs_qid { u8 type; u32 version; u64 path; }; /* Plan 9 file metadata (stat) structure */ struct v9fs_stat { u16 size; u16 type; u32 dev; struct v9fs_qid qid; u32 mode; u32 atime; u32 mtime; u64 length; char *name; char *uid; char *gid; char *muid; char *extension; /* 9p2000.u extensions */ u32 n_uid; /* 9p2000.u extensions */ u32 n_gid; /* 9p2000.u extensions */ u32 n_muid; /* 9p2000.u extensions */ char data[0]; }; /* Structures for Protocol Operations */ struct Tversion { u32 msize; char *version; }; struct Rversion { u32 msize; char *version; }; struct Tauth { u32 afid; char *uname; char *aname; }; struct Rauth { struct v9fs_qid qid; }; struct Rerror { char *error; u32 errno; /* 9p2000.u extension */ }; struct Tflush { u32 oldtag; }; struct Rflush { }; struct Tattach { u32 fid; u32 afid; char *uname; char *aname; }; struct Rattach { struct v9fs_qid qid; }; struct Twalk { u32 fid; u32 newfid; u32 nwname; char **wnames; }; struct Rwalk { u32 nwqid; struct v9fs_qid *wqids; }; struct Topen { u32 fid; u8 mode; }; struct Ropen { struct v9fs_qid qid; u32 iounit; }; struct Tcreate { u32 fid; char *name; u32 perm; u8 mode; }; struct Rcreate { struct v9fs_qid qid; u32 iounit; }; struct Tread { u32 fid; u64 offset; u32 count; }; struct Rread { u32 count; u8 *data; }; struct Twrite { u32 fid; u64 offset; u32 count; u8 *data; }; struct Rwrite { u32 count; }; struct Tclunk { u32 fid; }; struct Rclunk { }; struct Tremove { u32 fid; }; struct Rremove { }; struct Tstat { u32 fid; }; struct Rstat { struct v9fs_stat *stat; }; struct Twstat { u32 fid; struct v9fs_stat *stat; }; struct Rwstat { }; /* * fcall is the primary packet structure * */ struct v9fs_fcall { u32 size; u8 id; u16 tag; union { struct Tversion tversion; struct Rversion rversion; struct Tauth tauth; struct Rauth rauth; struct Rerror rerror; struct Tflush tflush; struct Rflush rflush; struct Tattach tattach; struct Rattach rattach; struct Twalk twalk; struct Rwalk rwalk; struct Topen topen; struct Ropen ropen; struct Tcreate tcreate; struct Rcreate rcreate; struct Tread tread; struct Rread rread; struct Twrite twrite; struct Rwrite rwrite; struct Tclunk tclunk; struct Rclunk rclunk; struct Tremove tremove; struct Rremove rremove; struct Tstat tstat; struct Rstat rstat; struct Twstat twstat; struct Rwstat rwstat; } params; }; #define FCALL_ERROR(fcall) (fcall ? fcall->params.rerror.error : "") int v9fs_t_version(struct v9fs_session_info *v9ses, u32 msize, char *version, struct v9fs_fcall **rcall); int v9fs_t_attach(struct v9fs_session_info *v9ses, char *uname, char *aname, u32 fid, u32 afid, struct v9fs_fcall **rcall); int v9fs_t_clunk(struct v9fs_session_info *v9ses, u32 fid, struct v9fs_fcall **rcall); int v9fs_t_flush(struct v9fs_session_info *v9ses, u16 oldtag); int v9fs_t_stat(struct v9fs_session_info *v9ses, u32 fid, struct v9fs_fcall **rcall); int v9fs_t_wstat(struct v9fs_session_info *v9ses, u32 fid, struct v9fs_stat *stat, struct v9fs_fcall **rcall); int v9fs_t_walk(struct v9fs_session_info *v9ses, u32 fid, u32 newfid, char *name, struct v9fs_fcall **rcall); int v9fs_t_open(struct v9fs_session_info *v9ses, u32 fid, u8 mode, struct v9fs_fcall **rcall); int v9fs_t_remove(struct v9fs_session_info *v9ses, u32 fid, struct v9fs_fcall **rcall); int v9fs_t_create(struct v9fs_session_info *v9ses, u32 fid, char *name, u32 perm, u8 mode, struct v9fs_fcall **rcall); int v9fs_t_read(struct v9fs_session_info *v9ses, u32 fid, u64 offset, u32 count, struct v9fs_fcall **rcall); int v9fs_t_write(struct v9fs_session_info *v9ses, u32 fid, u64 offset, u32 count, void *data, struct v9fs_fcall **rcall);