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src.rivoreo.one / emulators / v86 / d4420ceba94eefd3d34eee659fa486b492d048c7 / . / lib / 9p.js
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// -------------------------------------------------
// --------------------- 9P ------------------------
// -------------------------------------------------
// Implementation of the 9p filesystem device following the
// 9P2000.L protocol ( https://code.google.com/p/diod/wiki/protocol )
"use strict";
// TODO
// flush
// lock?
// correct hard links
var EPERM = 1; /* Operation not permitted */
var ENOENT = 2; /* No such file or directory */
var EINVAL = 22; /* Invalid argument */
var ENOTSUPP = 524; /* Operation is not supported */
var ENOTEMPTY = 39; /* Directory not empty */
var EPROTO = 71 /* Protocol error */
var P9_SETATTR_MODE = 0x00000001;
var P9_SETATTR_UID = 0x00000002;
var P9_SETATTR_GID = 0x00000004;
var P9_SETATTR_SIZE = 0x00000008;
var P9_SETATTR_ATIME = 0x00000010;
var P9_SETATTR_MTIME = 0x00000020;
var P9_SETATTR_CTIME = 0x00000040;
var P9_SETATTR_ATIME_SET = 0x00000080;
var P9_SETATTR_MTIME_SET = 0x00000100;
var P9_STAT_MODE_DIR = 0x80000000;
var P9_STAT_MODE_APPEND = 0x40000000;
var P9_STAT_MODE_EXCL = 0x20000000;
var P9_STAT_MODE_MOUNT = 0x10000000;
var P9_STAT_MODE_AUTH = 0x08000000;
var P9_STAT_MODE_TMP = 0x04000000;
var P9_STAT_MODE_SYMLINK = 0x02000000;
var P9_STAT_MODE_LINK = 0x01000000;
var P9_STAT_MODE_DEVICE = 0x00800000;
var P9_STAT_MODE_NAMED_PIPE = 0x00200000;
var P9_STAT_MODE_SOCKET = 0x00100000;
var P9_STAT_MODE_SETUID = 0x00080000;
var P9_STAT_MODE_SETGID = 0x00040000;
var P9_STAT_MODE_SETVTX = 0x00010000;
var FID_NONE = -1;
var FID_INODE = 1;
var FID_XATTR = 2;
/** @constructor */
function Virtio9p(filesystem) {
this.fs = filesystem;
this.SendReply = function(x) {};
this.deviceid = 0x9; // 9p filesystem
this.hostfeature = 0x1; // mountpoint
//this.configspace = [0x0, 0x4, 0x68, 0x6F, 0x73, 0x74]; // length of string and "host" string
//this.configspace = [0x0, 0x9, 0x2F, 0x64, 0x65, 0x76, 0x2F, 0x72, 0x6F, 0x6F, 0x74 ]; // length of string and "/dev/root" string
this.configspace = [0x6, 0x0, 0x68, 0x6F, 0x73, 0x74, 0x39, 0x70]; // length of string and "host9p" string
this.VERSION = "9P2000.L";
this.BLOCKSIZE = 8192; // Let's define one page.
this.msize = 8192; // maximum message size
this.replybuffer = new Uint8Array(this.msize*2); // Twice the msize to stay on the safe site
this.replybuffersize = 0;
this.fid2inode = [];
this.fidtype = [];
this._state_skip = ["fs", "SendReply"];
}
Virtio9p.prototype.Reset = function() {
this.fid2inode = [];
this.fidtype = [];
}
Virtio9p.prototype.BuildReply = function(id, tag, payloadsize) {
Marshall(["w", "b", "h"], [payloadsize+7, id+1, tag], this.replybuffer, 0);
if ((payloadsize+7) >= this.replybuffer.length) {
DebugMessage("Error in 9p: payloadsize exceeds maximum length");
}
//for(var i=0; i<payload.length; i++)
// this.replybuffer[7+i] = payload[i];
this.replybuffersize = payloadsize+7;
return;
}
Virtio9p.prototype.SendError = function (tag, errormsg, errorcode) {
//var size = Marshall(["s", "w"], [errormsg, errorcode], this.replybuffer, 7);
var size = Marshall(["w"], [errorcode], this.replybuffer, 7);
this.BuildReply(6, tag, size);
}
Virtio9p.prototype.ReceiveRequest = function (index, GetByte) {
var header = Unmarshall2(["w", "b", "h"], GetByte);
//var size = header[0];
var id = header[1];
var tag = header[2];
//DebugMessage("size:" + size + " id:" + id + " tag:" + tag);
switch(id)
{
case 8: // statfs
var size = this.fs.GetTotalSize();
var req = [];
req[0] = 0x01021997;
req[1] = this.BLOCKSIZE; // optimal transfer block size
req[2] = Math.floor(1024*1024*1024/req[1]); // free blocks, let's say 1GB
req[3] = req[2] - Math.floor(size/req[1]); // free blocks in fs
req[4] = req[2] - Math.floor(size/req[1]); // free blocks avail to non-superuser
req[5] = this.fs.inodes.length; // total number of inodes
req[6] = 1024*1024;
req[7] = 0; // file system id?
req[8] = 256; // maximum length of filenames
size = Marshall(["w", "w", "d", "d", "d", "d", "d", "d", "w"], req, this.replybuffer, 7);
this.BuildReply(id, tag, size);
this.SendReply(index);
break;
case 112: // topen
case 12: // tlopen
var req = Unmarshall2(["w", "w"], GetByte);
var fid = req[0];
var mode = req[1];
DebugMessage("[open] fid=" + fid + ", mode=" + mode);
var inode = this.fs.GetInode(this.fid2inode[fid]);
req[0] = inode.qid;
req[1] = this.msize - 24;
Marshall(["Q", "w"], req, this.replybuffer, 7);
this.BuildReply(id, tag, 13+4);
DebugMessage("file open " + inode.name);
//if (inode.status == STATUS_LOADING) return;
var ret = this.fs.OpenInode(this.fid2inode[fid], mode);
this.fs.AddEvent(this.fid2inode[fid],
function() {
DebugMessage("file opened " + inode.name + " tag:"+tag);
req[0] = inode.qid;
req[1] = this.msize - 24;
Marshall(["Q", "w"], req, this.replybuffer, 7);
this.BuildReply(id, tag, 13+4);
this.SendReply(index);
}.bind(this)
);
break;
case 70: // link (just copying)
var req = Unmarshall2(["w", "w", "s"], GetByte);
var dfid = req[0];
var fid = req[1];
var name = req[2];
DebugMessage("[link] dfid=" + dfid + ", name=" + name);
var inode = this.fs.CreateInode();
var inodetarget = this.fs.GetInode(this.fid2inode[fid]);
var targetdata = this.fs.inodedata[this.fid2inode[fid]];
//inode = inodetarget;
inode.mode = inodetarget.mode;
inode.size = inodetarget.size;
inode.symlink = inodetarget.symlink;
var data = this.fs.inodedata[this.fs.inodes.length] = new Uint8Array(inode.size);
inode.waswritten = true;
for(var i=0; i<inode.size; i++) {
data[i] = targetdata[i];
}
inode.name = name;
inode.parentid = this.fid2inode[dfid];
this.fs.PushInode(inode);
//inode.uid = inodetarget.uid;
//inode.gid = inodetarget.gid;
//inode.mode = inodetarget.mode | S_IFLNK;
this.BuildReply(id, tag, 0);
this.SendReply(index);
break;
case 16: // symlink
var req = Unmarshall2(["w", "s", "s", "w"], GetByte);
var fid = req[0];
var name = req[1];
var symgt = req[2];
var gid = req[3];
DebugMessage("[symlink] fid=" + fid + ", name=" + name + ", symgt=" + symgt + ", gid=" + gid);
var idx = this.fs.CreateSymlink(name, this.fid2inode[fid], symgt);
var inode = this.fs.GetInode(idx);
inode.uid = gid;
inode.gid = gid;
Marshall(["Q"], [inode.qid], this.replybuffer, 7);
this.BuildReply(id, tag, 13);
this.SendReply(index);
break;
case 18: // mknod
var req = Unmarshall2(["w", "s", "w", "w", "w", "w"], GetByte);
var fid = req[0];
var name = req[1];
var mode = req[2];
var major = req[3];
var minor = req[4];
//var gid = req[5];
DebugMessage("[mknod] fid=" + fid + ", name=" + name + ", major=" + major + ", minor=" + minor+ "");
var idx = this.fs.CreateNode(name, this.fid2inode[fid], major, minor);
var inode = this.fs.GetInode(idx);
inode.mode = mode;
inode.uid = gid;
inode.gid = gid;
Marshall(["Q"], [inode.qid], this.replybuffer, 7);
this.BuildReply(id, tag, 13);
this.SendReply(index);
break;
case 22: // TREADLINK
var req = Unmarshall2(["w"], GetByte);
var fid = req[0];
DebugMessage("[readlink] fid=" + fid);
var inode = this.fs.GetInode(this.fid2inode[fid]);
var size = Marshall(["s"], [inode.symlink], this.replybuffer, 7);
this.BuildReply(id, tag, size);
this.SendReply(index);
break;
case 72: // tmkdir
var req = Unmarshall2(["w", "s", "w", "w"], GetByte);
var fid = req[0];
var name = req[1];
var mode = req[2];
var gid = req[3];
DebugMessage("[mkdir] fid=" + fid + ", name=" + name + ", mode=" + mode + ", gid=" + gid);
var idx = this.fs.CreateDirectory(name, this.fid2inode[fid]);
var inode = this.fs.GetInode(idx);
inode.mode = mode | S_IFDIR;
inode.uid = gid;
inode.gid = gid;
Marshall(["Q"], [inode.qid], this.replybuffer, 7);
this.BuildReply(id, tag, 13);
this.SendReply(index);
break;
case 14: // tlcreate
var req = Unmarshall2(["w", "s", "w", "w", "w"], GetByte);
var fid = req[0];
var name = req[1];
var flags = req[2];
var mode = req[3];
var gid = req[4];
DebugMessage("[create] fid=" + fid + ", name=" + name + ", flags=" + flags + ", mode=" + mode + ", gid=" + gid);
var idx = this.fs.CreateFile(name, this.fid2inode[fid]);
this.fid2inode[fid] = idx;
this.fidtype[fid] = FID_INODE;
var inode = this.fs.GetInode(idx);
inode.uid = gid;
inode.gid = gid;
inode.mode = mode;
Marshall(["Q", "w"], [inode.qid, this.msize - 24], this.replybuffer, 7);
this.BuildReply(id, tag, 13+4);
this.SendReply(index);
break;
case 52: // lock always suceed
DebugMessage("lock file\n");
Marshall(["w"], [0], this.replybuffer, 7);
this.BuildReply(id, tag, 1);
this.SendReply(index);
break;
/*
case 54: // getlock
break;
*/
case 24: // getattr
var req = Unmarshall2(["w", "d"], GetByte);
var fid = req[0];
var inode = this.fs.GetInode(this.fid2inode[fid]);
DebugMessage("[getattr]: fid=" + fid + " name=" + inode.name + " request mask=" + req[1]);
req[0] |= 0x1000; // P9_STATS_GEN
req[0] = req[1]; // request mask
req[1] = inode.qid;
req[2] = inode.mode;
req[3] = inode.uid; // user id
req[4] = inode.gid; // group id
req[5] = 0x1; // number of hard links
req[6] = (inode.major<<8) | (inode.minor); // device id low
req[7] = inode.size; // size low
req[8] = inode.size; // blk size low
req[9] = Math.floor(inode.size/this.BLOCKSIZE+1); // number of file system blocks
req[10] = inode.atime; // atime
req[11] = 0x0;
req[12] = inode.mtime; // mtime
req[13] = 0x0;
req[14] = inode.ctime; // ctime
req[15] = 0x0;
req[16] = 0x0; // btime
req[17] = 0x0;
req[18] = 0x0; // st_gen
req[19] = 0x0; // data_version
Marshall([
"d", "Q",
"w",
"w", "w",
"d", "d",
"d", "d", "d",
"d", "d", // atime
"d", "d", // mtime
"d", "d", // ctime
"d", "d", // btime
"d", "d",
], req, this.replybuffer, 7);
this.BuildReply(id, tag, 8 + 13 + 4 + 4+ 4 + 8*15);
this.SendReply(index);
break;
case 26: // setattr
var req = Unmarshall2(["w", "w",
"w", // mode
"w", "w", // uid, gid
"d", // size
"d", "d", // atime
"d", "d"] // mtime
, GetByte);
var fid = req[0];
var inode = this.fs.GetInode(this.fid2inode[fid]);
DebugMessage("[setattr]: fid=" + fid + " request mask=" + req[1] + " name=" +inode.name);
if (req[1] & P9_SETATTR_MODE) {
inode.mode = req[2];
}
if (req[1] & P9_SETATTR_UID) {
inode.uid = req[3];
}
if (req[1] & P9_SETATTR_GID) {
inode.gid = req[4];
}
if (req[1] & P9_SETATTR_ATIME_SET) {
inode.atime = req[6];
}
if (req[1] & P9_SETATTR_MTIME_SET) {
inode.atime = req[8];
}
if (req[1] & P9_SETATTR_ATIME) {
inode.atime = Math.floor((new Date()).getTime()/1000);
}
if (req[1] & P9_SETATTR_MTIME) {
inode.mtime = Math.floor((new Date()).getTime()/1000);
}
if (req[1] & P9_SETATTR_CTIME) {
inode.ctime = Math.floor((new Date()).getTime()/1000);
}
if (req[1] & P9_SETATTR_SIZE) {
this.fs.ChangeSize(this.fid2inode[fid], req[5]);
}
this.BuildReply(id, tag, 0);
this.SendReply(index);
break;
case 50: // fsync
var req = Unmarshall2(["w", "d"], GetByte);
var fid = req[0];
this.BuildReply(id, tag, 0);
this.SendReply(index);
break;
case 40: // TREADDIR
case 116: // read
var req = Unmarshall2(["w", "d", "w"], GetByte);
var fid = req[0];
var offset = req[1];
var count = req[2];
var inode = this.fs.GetInode(this.fid2inode[fid]);
if (id == 40) DebugMessage("[treaddir]: fid=" + fid + " offset=" + offset + " count=" + count);
if (id == 116) DebugMessage("[read]: fid=" + fid + " (" + inode.name + ") offset=" + offset + " count=" + count + " fidtype=" + this.fidtype[fid]);
if (this.fidtype[fid] == FID_XATTR) {
if (inode.caps.length < offset+count) count = inode.caps.length - offset;
for(var i=0; i<count; i++)
this.replybuffer[7+4+i] = inode.caps[offset+i];
Marshall(["w"], [count], this.replybuffer, 7);
this.BuildReply(id, tag, 4 + count);
this.SendReply(index);
} else {
this.fs.OpenInode(this.fid2inode[fid]);
this.fs.AddEvent(this.fid2inode[fid],
function() {
if (inode.size < offset+count) count = inode.size - offset;
var data = this.fs.inodedata[this.fid2inode[fid]];
if(data) {
for(var i=0; i<count; i++)
this.replybuffer[7+4+i] = data[offset+i];
}
Marshall(["w"], [count], this.replybuffer, 7);
this.BuildReply(id, tag, 4 + count);
this.SendReply(index);
}.bind(this)
);
}
break;
case 118: // write
var req = Unmarshall2(["w", "d", "w"], GetByte);
var fid = req[0];
var offset = req[1];
var count = req[2];
DebugMessage("[write]: fid=" + fid + " (" + this.fs.inodes[this.fid2inode[fid]].name + ") offset=" + offset + " count=" + count);
this.fs.Write(this.fid2inode[fid], offset, count, GetByte);
Marshall(["w"], [count], this.replybuffer, 7);
this.BuildReply(id, tag, 4);
this.SendReply(index);
break;
case 74: // RENAMEAT
var req = Unmarshall2(["w", "s", "w", "s"], GetByte);
var olddirfid = req[0];
var oldname = req[1];
var newdirfid = req[2];
var newname = req[3];
DebugMessage("[renameat]: oldname=" + oldname + " newname=" + newname);
var ret = this.fs.Rename(this.fid2inode[olddirfid], oldname, this.fid2inode[newdirfid], newname);
if (ret == false) {
this.SendError(tag, "No such file or directory", ENOENT);
this.SendReply(index);
break;
}
this.BuildReply(id, tag, 0);
this.SendReply(index);
break;
case 76: // TUNLINKAT
var req = Unmarshall2(["w", "s", "w"], GetByte);
var dirfd = req[0];
var name = req[1];
var flags = req[2];
DebugMessage("[unlink]: dirfd=" + dirfd + " name=" + name + " flags=" + flags);
var fid = this.fs.Search(this.fid2inode[dirfd], name);
if (fid == -1) {
this.SendError(tag, "No such file or directory", ENOENT);
this.SendReply(index);
break;
}
var ret = this.fs.Unlink(fid);
if (!ret) {
this.SendError(tag, "Directory not empty", ENOTEMPTY);
this.SendReply(index);
break;
}
this.BuildReply(fid, tag, 0);
this.SendReply(index);
break;
case 100: // version
var version = Unmarshall2(["w", "s"], GetByte);
DebugMessage("[version]: msize=" + version[0] + " version=" + version[1]);
this.msize = version[0];
var size = Marshall(["w", "s"], [this.msize, this.VERSION], this.replybuffer, 7);
this.BuildReply(id, tag, size);
this.SendReply(index);
break;
case 104: // attach
// return root directorie's QID
var req = Unmarshall2(["w", "w", "s", "s"], GetByte);
var fid = req[0];
DebugMessage("[attach]: fid=" + fid + " afid=" + hex8(req[1]) + " uname=" + req[2] + " aname=" + req[3]);
this.fid2inode[fid] = 0;
this.fidtype[fid] = FID_INODE;
var inode = this.fs.GetInode(this.fid2inode[fid]);
Marshall(["Q"], [inode.qid], this.replybuffer, 7);
this.BuildReply(id, tag, 13);
this.SendReply(index);
break;
case 108: // tflush
var req = Unmarshall2(["h"], GetByte);
var oldtag = req[0];
DebugMessage("[flush] " + tag);
//Marshall(["Q"], [inode.qid], this.replybuffer, 7);
this.BuildReply(id, tag, 0);
this.SendReply(index);
break;
case 110: // walk
var req = Unmarshall2(["w", "w", "h"], GetByte);
var fid = req[0];
var nwfid = req[1];
var nwname = req[2];
DebugMessage("[walk]: fid=" + req[0] + " nwfid=" + req[1] + " nwname=" + nwname);
if (nwname == 0) {
this.fid2inode[nwfid] = this.fid2inode[fid];
Marshall(["h"], [0], this.replybuffer, 7);
this.BuildReply(id, tag, 2);
this.SendReply(index);
break;
}
var wnames = [];
for(var i=0; i<nwname; i++) {
wnames.push("s");
}
var walk = Unmarshall2(wnames, GetByte);
var idx = this.fid2inode[fid];
var offset = 7+2;
var nwidx = 0;
//console.log(idx, this.fs.inodes[idx]);
DebugMessage("walk in dir " + this.fs.inodes[idx].name + " to: " + walk.toString());
for(var i=0; i<nwname; i++) {
idx = this.fs.Search(idx, walk[i]);
if (idx == -1) {
DebugMessage("Could not find: " + walk[i]);
break;
}
offset += Marshall(["Q"], [this.fs.inodes[idx].qid], this.replybuffer, offset);
nwidx++;
DebugMessage(this.fid2inode[nwfid]);
this.fid2inode[nwfid] = idx;
this.fidtype[nwfid] = FID_INODE;
}
Marshall(["h"], [nwidx], this.replybuffer, 7);
this.BuildReply(id, tag, offset-7);
this.SendReply(index);
break;
case 120: // clunk
var req = Unmarshall2(["w"], GetByte);
DebugMessage("[clunk]: fid=" + req[0]);
if (this.fid2inode[req[0]] >= 0) {
this.fs.CloseInode(this.fid2inode[req[0]]);
this.fid2inode[req[0]] = -1;
this.fidtype[req[0]] = FID_NONE;
}
this.BuildReply(id, tag, 0);
this.SendReply(index);
break;
case 32:
this.SendError(tag, "Operation i not supported", ENOTSUPP);
this.SendReply(index);
break;
case 30: // xattrwalk
var req = Unmarshall2(["w", "w", "s"], GetByte);
var fid = req[0];
var newfid = req[1];
var name = req[2];
DebugMessage("[xattrwalk]: fid=" + req[0] + " newfid=" + req[1] + " name=" + req[2]);
this.fid2inode[newfid] = this.fid2inode[fid];
this.fidtype[newfid] = FID_NONE;
var length = 0;
if (name == "security.capability") {
length = this.fs.PrepareCAPs(this.fid2inode[fid]);
this.fidtype[newfid] = FID_XATTR;
}
Marshall(["d"], [length], this.replybuffer, 7);
this.BuildReply(id, tag, 8);
this.SendReply(index);
break;
default:
DebugMessage("Error in Virtio9p: Unknown id " + id + " received");
abort();
//this.SendError(tag, "Operation i not supported", ENOTSUPP);
//this.SendReply(index);
break;
}
//consistency checks if there are problems with the filesystem
//this.fs.Check();
}