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fuse-friends_fuse-native
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added unmount + better example

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reimpl
Andrew Osheroff 5 years ago
parent d5747dd20f
commit 9121e8822c
3 changed files with 352 additions and 55 deletions
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84
example.js
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@ -0,0 +1,84 @@
const Fuse = require('./')
const ops = {
readdir: function (path, cb) {
console.log('readdir(%s)', path)
if (path === '/') return process.nextTick(cb, 0, ['test'])
return process.nextTick(cb, 0)
},
/*
access: function (path, cb) {
return process.nextTick(cb, 0)
},
*/
getattr: function (path, cb) {
console.log('getattr(%s)', path)
if (path === '/') {
return process.nextTick(cb, 0, {
mtime: new Date(),
atime: new Date(),
ctime: new Date(),
nlink: 1,
size: 100,
mode: 16877,
uid: process.getuid ? process.getuid() : 0,
gid: process.getgid ? process.getgid() : 0
})
}
if (path === '/test') {
return process.nextTick(cb, 0, {
mtime: new Date(),
atime: new Date(),
ctime: new Date(),
nlink: 1,
size: 12,
mode: 33188,
uid: process.getuid ? process.getuid() : 0,
gid: process.getgid ? process.getgid() : 0
})
}
return process.nextTick(cb, Fuse.ENOENT)
},
open: function (path, flags, cb) {
console.log('open(%s, %d)', path, flags)
return process.nextTick(cb, 0, 42) // 42 is an fd
},
read: function (path, fd, buf, len, pos, cb) {
console.log('read(%s, %d, %d, %d)', path, fd, len, pos)
var str = 'hello world\n'.slice(pos)
if (!str) return process.nextTick(cb, 0)
buf.write(str)
return process.nextTick(cb, str.length)
}
}
const fuse = new Fuse('./mnt', ops, { debug: true })
fuse.mount(err => {
if (err) throw err
console.log('filesystem mounted on ' + fuse.mnt)
})
process.on('SIGINT', function () {
fuse.unmount(err => {
if (err) {
console.log('filesystem at ' + fuse.mnt + ' not unmounted', err)
} else {
console.log('filesystem at ' + fuse.mnt + ' unmounted')
}
})
})
function emptyStat (mode) {
return {
mtime: new Date(),
atime: new Date(),
ctime: new Date(),
nlink: 1,
size: 100,
mode: mode,
uid: process.getuid ? process.getuid() : 0,
gid: process.getgid ? process.getgid() : 0
}
}

23
fuse-native.c
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@ -90,6 +90,8 @@ typedef struct {
napi_ref on_symlink;
struct fuse *fuse;
struct fuse_chan *ch;
bool mounted;
uv_async_t async;
} fuse_thread_t;
@ -637,7 +639,7 @@ NAPI_METHOD(fuse_native_signal_readdir) {
}
NAPI_METHOD(fuse_native_mount) {
NAPI_ARGV(10)
NAPI_ARGV(11)
NAPI_ARGV_UTF8(mnt, 1024, 0);
NAPI_ARGV_UTF8(mntopts, 1024, 1);
@ -711,6 +713,8 @@ NAPI_METHOD(fuse_native_mount) {
struct fuse *fuse = fuse_new(ch, &args, &ops, sizeof(struct fuse_operations), ft);
ft->fuse = fuse;
ft->ch = ch;
ft->mounted = true;
if (fuse == NULL) {
napi_throw_error(env, "fuse failed", "fuse failed");
@ -723,10 +727,27 @@ NAPI_METHOD(fuse_native_mount) {
return NULL;
}
NAPI_METHOD(fuse_native_unmount) {
NAPI_ARGV(2)
NAPI_ARGV_UTF8(mnt, 1024, 0);
NAPI_ARGV_BUFFER_CAST(fuse_thread_t *, ft, 1);
if (ft != NULL && ft->mounted) {
fuse_unmount(mnt, ft->ch);
printf("joining\n");
pthread_join(ft->thread, NULL);
printf("joined\n");
}
ft->mounted = false;
return NULL;
}
NAPI_INIT() {
pthread_key_create(&(thread_locals_key), NULL); // TODO: add destructor
NAPI_EXPORT_FUNCTION(fuse_native_mount)
NAPI_EXPORT_FUNCTION(fuse_native_unmount)
NAPI_EXPORT_FUNCTION(fuse_native_signal_path)
NAPI_EXPORT_FUNCTION(fuse_native_signal_stat)
NAPI_EXPORT_FUNCTION(fuse_native_signal_statfs)

300
index.js
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@ -1,5 +1,13 @@
const binding = require('node-gyp-build')(__dirname)
const os = require('os')
const fs = require('fs')
const path = require('path')
const IS_OSX = os.platform() === 'darwin'
const OSX_FOLDER_ICON = '/System/Library/CoreServices/CoreTypes.bundle/Contents/Resources/GenericFolderIcon.icns'
const HAS_FOLDER_ICON = IS_OSX && fs.existsSync(OSX_FOLDER_ICON)
const binding = require('node-gyp-build')(__dirname)
const Opcodes = new Map([
[ 'init', 0 ],
[ 'error', 1 ],
@ -41,12 +49,14 @@ const Opcodes = new Map([
class Fuse {
constructor (mnt, ops, opts = {}) {
this.opts = opts
this.ops = ops
this.mnt = mnt
this.mnt = path.resolve(mnt)
this.ops = ops
this._thread = Buffer.alloc(binding.sizeof_fuse_thread_t)
// Keep the process alive while fuse is mounted.
this._timer = null
const implemented = []
const implemented = ['init', 'error', 'getattr']
if (ops) {
for (const [name, code] of Opcodes) {
if (ops[name]) implemented.push(code)
@ -58,6 +68,74 @@ class Fuse {
this._sync = true
}
_withDefaultOps (cb) {
const withDefaults = { ...this.ops }
const callback = function (err) {
callback = noop
setImmediate(cb.bind(null, err))
}
var init = this.ops.init || call
withDefaults.init = function (next) {
console.log('IN INIT')
callback()
if (init.length > 1) init(this.mnt, next) // backwards compat for now
else init(next)
}
var error = this.ops.error || call
withDefaults.error = function (next) {
console.log('IN ERROR')
callback(new Error('Mount failed'))
error(next)
}
if (!this.ops.getattr) { // we need this for unmount to work on osx
withDefaults.getattr = function (path, cb) {
if (path !== '/') return cb(Fuse.EPERM)
cb(null, { mtime: new Date(0), atime: new Date(0), ctime: new Date(0), mode: 16877, size: 4096 })
}
}
return withDefaults
}
_fuseOptions () {
const options = []
if ((/\*|(^,)fuse-bindings(,$)/.test(process.env.DEBUG)) || this.opts.debug) options.push('debug')
if (this.opts.allowOther) options.push('allow_other')
if (this.opts.allowRoot) options.push('allow_root')
if (this.opts.autoUnmount) options.push('auto_unmount')
if (this.opts.defaultPermissions) options.push('default_permissions')
if (this.opts.blkdev) options.push('blkdev')
if (this.opts.blksize) options.push('blksize=' + this.opts.blksize)
if (this.opts.maxRead) options.push('max_read=' + this.opts.maxRead)
if (this.opts.fd) options.push('fd=' + this.opts.fd)
if (this.opts.userId) options.push('user_id=', this.opts.userId)
if (this.opts.fsname) options.push('fsname=' + this.opts.fsname)
if (this.opts.subtype) options.push('subtype=' + this.opts.subtype)
if (this.opts.kernelCache) options.push('kernel_cache')
if (this.opts.autoCache) options.push('auto_cache')
if (this.opts.umask) options.push('umask=' + this.opts.umask)
if (this.opts.uid) options.push('uid=' + this.opts.uid)
if (this.opts.gid) options.push('gid=' + this.opts.gid)
if (this.opts.entryTimeout) options.push('entry_timeout=' + this.opts.entryTimeout)
if (this.opts.attrTimeout) options.push('attr_timeout=' + this.opts.attrTimeout)
if (this.opts.acAttrTimeout) options.push('ac_attr_timeout=' + this.opts.acAttrTimeout)
if (this.opts.noforget) options.push('noforget')
if (this.opts.remember) options.push('remember=' + this.opts.remember)
if (this.opts.modules) options.push('modules=' + this.opts.modules)
if (this.opts.displayFolder && IS_OSX) { // only works on osx
options.push('volname=' + path.basename(this.mnt))
if (HAS_FOLDER_ICON) options.push('volicon=' + OSX_FOLDER_ICON)
}
return options.map(o => '-o' + o).join(' ')
}
_signal (signalFunc, args) {
/*
if (this._sync) process.nextTick(() => signalFunc.apply(null, args))
@ -66,14 +144,43 @@ class Fuse {
process.nextTick(() => signalFunc.apply(null, args))
}
mount () {
binding.fuse_native_mount(this.mnt, '-odebug', this._thread, this,
this.on_path_op, this.on_stat_op, this.on_fd_op, this.on_xattr_op,
this.on_statfs, this.on_readdir, this.on_symlink)
mount (cb) {
this.ops = this._withDefaultOps(this.ops, cb)
const opts = this._fuseOptions()
fs.stat(this.mnt, (err, stat) => {
if (err) return cb(new Error('Mountpoint does not exist'))
if (!stat.isDirectory()) return cb(new Error('Mountpoint is not a directory'))
fs.stat(path.join(this.mnt, '..'), (_, parent) => {
if (parent && parent.dev !== stat.dev) return cb(new Error('Mountpoint in use'))
try {
// TODO: asyncify
binding.fuse_native_mount(this.mnt, opts, this._thread, this,
this.on_path_op, this.on_stat_op, this.on_fd_op, this.on_xattr_op,
this.on_statfs, this.on_readdir, this.on_symlink)
} catch (err) {
return cb(err)
}
this._timer = setInterval(() => {}, 10000)
return cb(null)
})
})
}
unmount (cb) {
// TODO: asyncify
try {
binding.fuse_native_unmount(this.mnt, this._thread)
} catch (err) {
clearInterval(this._timer)
return process.nextTick(cb, err)
}
clearInterval(this._timer)
return process.nextTick(cb, null)
}
unmount () {
binding.fuse_native_unmount(this.mnt)
errno (code) {
return (code && Fuse[code.toUpperCase()]) || -1
}
on_symlink (handle, op, path, target) {
@ -201,6 +308,133 @@ class Fuse {
}
}
Fuse.EPERM = -1
Fuse.ENOENT = -2
Fuse.ESRCH = -3
Fuse.EINTR = -4
Fuse.EIO = -5
Fuse.ENXIO = -6
Fuse.E2BIG = -7
Fuse.ENOEXEC = -8
Fuse.EBADF = -9
Fuse.ECHILD = -10
Fuse.EAGAIN = -11
Fuse.ENOMEM = -12
Fuse.EACCES = -13
Fuse.EFAULT = -14
Fuse.ENOTBLK = -15
Fuse.EBUSY = -16
Fuse.EEXIST = -17
Fuse.EXDEV = -18
Fuse.ENODEV = -19
Fuse.ENOTDIR = -20
Fuse.EISDIR = -21
Fuse.EINVAL = -22
Fuse.ENFILE = -23
Fuse.EMFILE = -24
Fuse.ENOTTY = -25
Fuse.ETXTBSY = -26
Fuse.EFBIG = -27
Fuse.ENOSPC = -28
Fuse.ESPIPE = -29
Fuse.EROFS = -30
Fuse.EMLINK = -31
Fuse.EPIPE = -32
Fuse.EDOM = -33
Fuse.ERANGE = -34
Fuse.EDEADLK = -35
Fuse.ENAMETOOLONG = -36
Fuse.ENOLCK = -37
Fuse.ENOSYS = -38
Fuse.ENOTEMPTY = -39
Fuse.ELOOP = -40
Fuse.EWOULDBLOCK = -11
Fuse.ENOMSG = -42
Fuse.EIDRM = -43
Fuse.ECHRNG = -44
Fuse.EL2NSYNC = -45
Fuse.EL3HLT = -46
Fuse.EL3RST = -47
Fuse.ELNRNG = -48
Fuse.EUNATCH = -49
Fuse.ENOCSI = -50
Fuse.EL2HLT = -51
Fuse.EBADE = -52
Fuse.EBADR = -53
Fuse.EXFULL = -54
Fuse.ENOANO = -55
Fuse.EBADRQC = -56
Fuse.EBADSLT = -57
Fuse.EDEADLOCK = -35
Fuse.EBFONT = -59
Fuse.ENOSTR = -60
Fuse.ENODATA = -61
Fuse.ETIME = -62
Fuse.ENOSR = -63
Fuse.ENONET = -64
Fuse.ENOPKG = -65
Fuse.EREMOTE = -66
Fuse.ENOLINK = -67
Fuse.EADV = -68
Fuse.ESRMNT = -69
Fuse.ECOMM = -70
Fuse.EPROTO = -71
Fuse.EMULTIHOP = -72
Fuse.EDOTDOT = -73
Fuse.EBADMSG = -74
Fuse.EOVERFLOW = -75
Fuse.ENOTUNIQ = -76
Fuse.EBADFD = -77
Fuse.EREMCHG = -78
Fuse.ELIBACC = -79
Fuse.ELIBBAD = -80
Fuse.ELIBSCN = -81
Fuse.ELIBMAX = -82
Fuse.ELIBEXEC = -83
Fuse.EILSEQ = -84
Fuse.ERESTART = -85
Fuse.ESTRPIPE = -86
Fuse.EUSERS = -87
Fuse.ENOTSOCK = -88
Fuse.EDESTADDRREQ = -89
Fuse.EMSGSIZE = -90
Fuse.EPROTOTYPE = -91
Fuse.ENOPROTOOPT = -92
Fuse.EPROTONOSUPPORT = -93
Fuse.ESOCKTNOSUPPORT = -94
Fuse.EOPNOTSUPP = -95
Fuse.EPFNOSUPPORT = -96
Fuse.EAFNOSUPPORT = -97
Fuse.EADDRINUSE = -98
Fuse.EADDRNOTAVAIL = -99
Fuse.ENETDOWN = -100
Fuse.ENETUNREACH = -101
Fuse.ENETRESET = -102
Fuse.ECONNABORTED = -103
Fuse.ECONNRESET = -104
Fuse.ENOBUFS = -105
Fuse.EISCONN = -106
Fuse.ENOTCONN = -107
Fuse.ESHUTDOWN = -108
Fuse.ETOOMANYREFS = -109
Fuse.ETIMEDOUT = -110
Fuse.ECONNREFUSED = -111
Fuse.EHOSTDOWN = -112
Fuse.EHOSTUNREACH = -113
Fuse.EALREADY = -114
Fuse.EINPROGRESS = -115
Fuse.ESTALE = -116
Fuse.EUCLEAN = -117
Fuse.ENOTNAM = -118
Fuse.ENAVAIL = -119
Fuse.EISNAM = -120
Fuse.EREMOTEIO = -121
Fuse.EDQUOT = -122
Fuse.ENOMEDIUM = -123
Fuse.EMEDIUMTYPE = -124
module.exports = Fuse
function getStatfsArray (statfs) {
const ints = new Uint32Array(11)
@ -251,47 +485,5 @@ function getStatArray (stat) {
return ints
}
function emptyStat (mode) {
return {
mtime: new Date(),
atime: new Date(),
ctime: new Date(),
nlink: 1,
size: 100,
mode: mode,
uid: process.getuid ? process.getuid() : 0,
gid: process.getgid ? process.getgid() : 0
}
}
const f = new Fuse('mnt', {
getattr: (path, cb) => {
if (path === '/') return cb(0, emptyStat(16877))
return cb(0, emptyStat(33188))
},
access: (path, mode, cb) => {
return cb(0, 0)
},
setxattr: (path, name, buffer, length, offset, cb) => {
return cb(0)
},
utimens: (path, atim, mtim, cb) => {
return cb(0)
},
readdir: (path, cb) => {
if (path === '/') {
return cb(0, ['a', 'b', 'c'], Array(3).fill('a').map(() => emptyStat(16877)))
}
return cb(0, [], [])
}
})
f.mount()
setInterval(() => {
if (global.gc) gc()
}, 1000)
// setTimeout(function () {
// foo = null
// console.log('now!')
// }, 5000)
function noop () {}
function call (cb) { cb() }

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