From b8cf945b3166c4394386f162a527c9950f396ce2 Mon Sep 17 00:00:00 2001 From: Eric Van Hensbergen Date: Fri, 9 Sep 2005 13:04:21 -0700 Subject: [PATCH] v9fs: 9P protocol implementation This part of the patch contains the 9P protocol functions. Signed-off-by: Eric Van Hensbergen Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/9p/9p.h | 341 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 341 insertions(+) create mode 100644 fs/9p/9p.h (limited to 'fs/9p/9p.h') diff --git a/fs/9p/9p.h b/fs/9p/9p.h new file mode 100644 index 000000000000..f55424216be2 --- /dev/null +++ b/fs/9p/9p.h @@ -0,0 +1,341 @@ +/* + * 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); -- cgit v1.2.3