[PATCH] v9fs: 9P protocol implementation
This part of the patch contains the 9P protocol functions.
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/9p.h b/fs/9p/9p.h
new file mode 100644
index 0000000..f554242
--- /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 <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
+ *
+ */
+
+/* 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);