File: kio_nfs.cpp

package info (click to toggle)
kio-extras 4%3A16.08.3-1
  • links: PTS, VCS
  • area: main
  • in suites: stretch
  • size: 2,720 kB
  • ctags: 3,303
  • sloc: cpp: 26,172; ansic: 5,034; perl: 1,056; xml: 460; python: 28; sh: 20; makefile: 6
file content (735 lines) | stat: -rw-r--r-- 18,276 bytes parent folder | download
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
/*  This file is part of the KDE project

    Copyright(C) 2000 Alexander Neundorf <neundorf@kde.org>,
        2014 Mathias Tillman <master.homer@gmail.com>

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License as published by the Free Software Foundation; either
    version 2 of the License, or (at your option) any later version.

    This library 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
    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public License
    along with this library; see the file COPYING.LIB.  If not, write to
    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
    Boston, MA 02110-1301, USA.
*/

#include "kio_nfs.h"

#include <config-runtime.h>

#include <sys/types.h>
#include <sys/stat.h>
#include <sys/utsname.h>

#include <arpa/inet.h>
#include <netdb.h>

#include <QFile>
#include <QDir>
#include <QDebug>
#include <QtNetwork/QHostInfo>

#include <KLocalizedString>
#include <kio/global.h>

#include "nfsv2.h"
#include "nfsv3.h"

using namespace KIO;
using namespace std;

Q_LOGGING_CATEGORY(LOG_KIO_NFS, "kde.kio-nfs")


extern "C" int Q_DECL_EXPORT kdemain(int argc, char** argv);

int kdemain(int argc, char** argv)
{
    if (argc != 4) {
        fprintf(stderr, "Usage: kio_nfs protocol domain-socket1 domain-socket2\n");
        exit(-1);
    }

    qCDebug(LOG_KIO_NFS) << "NFS: kdemain: starting";

    NFSSlave slave(argv[2], argv[3]);
    slave.dispatchLoop();

    return 0;
}

NFSSlave::NFSSlave(const QByteArray& pool, const QByteArray& app)
    :  KIO::SlaveBase("nfs", pool, app),
       m_protocol(NULL)
{

    qCDebug(LOG_KIO_NFS) << pool << app;
}
NFSSlave::~NFSSlave()
{
    if (m_protocol != NULL) {
        delete m_protocol;
    }
}

void NFSSlave::openConnection()
{
    qCDebug(LOG_KIO_NFS) << "openConnection";

    if (m_protocol != NULL) {
        m_protocol->openConnection();
    } else {
        bool connectionError = false;

        int version = 4;
        while (version > 1) {
            qCDebug(LOG_KIO_NFS) << "Trying NFS version" << version;

            // We need to create a new NFS protocol handler
            switch (version) {
            case 4: {
                // TODO
                qCDebug(LOG_KIO_NFS) << "NFSv4 is not supported at this time";
            }
            break;
            case 3: {
                m_protocol = new NFSProtocolV3(this);
            }
            break;
            case 2: {
                m_protocol = new NFSProtocolV2(this);
            }
            break;
            }

            // Unimplemented protocol version
            if (m_protocol == NULL) {
                version--;
                continue;
            }

            m_protocol->setHost(m_host);
            if (m_protocol->isCompatible(connectionError)) {
                break;
            }

            version--;
            delete m_protocol;
            m_protocol = NULL;
        }


        if (m_protocol == NULL) {
            // If we could not find a compatible protocol, send an error.
            if (!connectionError) {
                error(KIO::ERR_COULD_NOT_CONNECT, i18n("%1: Unsupported NFS version", m_host));
            } else {
                error(KIO::ERR_COULD_NOT_CONNECT, m_host);
            }
        } else {
            // Otherwise we open the connection
            m_protocol->openConnection();
        }
    }
}

void NFSSlave::closeConnection()
{
    qCDebug(LOG_KIO_NFS);

    if (m_protocol != NULL) {
        m_protocol->closeConnection();
    }
}

void NFSSlave::setHost(const QString& host, quint16 /*port*/, const QString& /*user*/, const QString& /*pass*/)
{
    qCDebug(LOG_KIO_NFS);

    if (m_protocol != NULL) {
        // New host? New protocol!
        if (m_host != host) {
            qCDebug(LOG_KIO_NFS) << "Deleting old protocol";
            delete m_protocol;
            m_protocol = NULL;
        } else {
            m_protocol->setHost(host);
        }
    }

    m_host = host;
}

void NFSSlave::put(const QUrl& url, int _mode, KIO::JobFlags _flags)
{
    qCDebug(LOG_KIO_NFS);

    if (verifyProtocol()) {
        m_protocol->put(url, _mode, _flags);
    }
}

void NFSSlave::get(const QUrl& url)
{
    qCDebug(LOG_KIO_NFS);

    if (verifyProtocol()) {
        m_protocol->get(url);
    }
}

void NFSSlave::listDir(const QUrl& url)
{
    qCDebug(LOG_KIO_NFS) << url;

    if (verifyProtocol()) {
        m_protocol->listDir(url);
    }
}

void NFSSlave::symlink(const QString& target, const QUrl& dest, KIO::JobFlags _flags)
{
    qCDebug(LOG_KIO_NFS);

    if (verifyProtocol()) {
        m_protocol->symlink(target, dest, _flags);
    }
}

void NFSSlave::stat(const QUrl& url)
{
    qCDebug(LOG_KIO_NFS);

    if (verifyProtocol()) {
        m_protocol->stat(url);
    }
}

void NFSSlave::mkdir(const QUrl& url, int permissions)
{
    qCDebug(LOG_KIO_NFS);

    if (verifyProtocol()) {
        m_protocol->mkdir(url, permissions);
    }
}

void NFSSlave::del(const QUrl& url, bool isfile)
{
    qCDebug(LOG_KIO_NFS);

    if (verifyProtocol()) {
        m_protocol->del(url, isfile);
    }
}

void NFSSlave::chmod(const QUrl& url, int permissions)
{
    qCDebug(LOG_KIO_NFS);

    if (verifyProtocol()) {
        m_protocol->chmod(url, permissions);
    }
}

void NFSSlave::rename(const QUrl& src, const QUrl& dest, KIO::JobFlags flags)
{
    qCDebug(LOG_KIO_NFS);

    if (verifyProtocol()) {
        m_protocol->rename(src, dest, flags);
    }
}

void NFSSlave::copy(const QUrl& src, const QUrl& dest, int mode, KIO::JobFlags flags)
{
    qCDebug(LOG_KIO_NFS);

    if (verifyProtocol()) {
        m_protocol->copy(src, dest, mode, flags);
    }
}

bool NFSSlave::verifyProtocol()
{
    const bool haveProtocol = (m_protocol != NULL);
    if (!haveProtocol) {
        openConnection();

        if (m_protocol == NULL) {
            // We have failed.... :(
            qCDebug(LOG_KIO_NFS) << "Could not find a compatible protocol version!!";
            return false;
        }

        // If we are not connected @openConnection will have sent an
        // error message to the client, so it's safe to return here.
        if (!m_protocol->isConnected()) {
            return false;
        }
    } else if (!m_protocol->isConnected()) {
        m_protocol->openConnection();
        if (!m_protocol->isConnected()) {
            return false;
        }
    }

    if (m_protocol->isConnected()) {
        return true;
    }

    finished();
    return false;
}


NFSFileHandle::NFSFileHandle()
    : m_handle(NULL),
      m_size(0),
      m_linkHandle(NULL),
      m_linkSize(0),
      m_isInvalid(true),
      m_isLink(false)
{

}

NFSFileHandle::NFSFileHandle(const NFSFileHandle& src)
    :  NFSFileHandle()
{
    (*this) = src;
}

NFSFileHandle::NFSFileHandle(const fhandle3& src)
    :  NFSFileHandle()
{
    (*this) = src;
}

NFSFileHandle::NFSFileHandle(const fhandle& src)
    :  NFSFileHandle()
{
    (*this) = src;
}

NFSFileHandle::NFSFileHandle(const nfs_fh3& src)
    :  NFSFileHandle()
{
    (*this) = src;
}

NFSFileHandle::NFSFileHandle(const nfs_fh& src)
    :  NFSFileHandle()
{
    (*this) = src;
}

NFSFileHandle::~NFSFileHandle()
{
    if (m_handle != NULL) {
        delete [] m_handle;
    }
    if (m_linkHandle != NULL) {
        delete [] m_linkHandle;
    }
}

void NFSFileHandle::toFH(nfs_fh3& fh) const
{
    fh.data.data_len = m_size;
    fh.data.data_val = m_handle;
}

void NFSFileHandle::toFH(nfs_fh& fh) const
{
    memcpy(fh.data, m_handle, m_size);
}

void NFSFileHandle::toFHLink(nfs_fh3& fh) const
{
    fh.data.data_len = m_linkSize;
    fh.data.data_val = m_linkHandle;
}

void NFSFileHandle::toFHLink(nfs_fh& fh) const
{
    memcpy(fh.data, m_linkHandle, m_size);
}

NFSFileHandle& NFSFileHandle::operator=(const NFSFileHandle& src)
{
    if (src.m_size > 0) {
        if (m_handle != NULL) {
            delete [] m_handle;
            m_handle = NULL;
        }

        m_size = src.m_size;
        m_handle = new char[m_size];
        memcpy(m_handle, src.m_handle, m_size);
    }
    if (src.m_linkSize > 0) {
        if (m_linkHandle != NULL) {
            delete [] m_linkHandle;
            m_linkHandle = NULL;
        }

        m_linkSize = src.m_linkSize;
        m_linkHandle = new char[m_linkSize];
        memcpy(m_linkHandle, src.m_linkHandle, m_linkSize);
    }

    m_isInvalid = src.m_isInvalid;
    m_isLink = src.m_isLink;
    return *this;
}

NFSFileHandle& NFSFileHandle::operator=(const fhandle3& src)
{
    if (m_handle != NULL) {
        delete [] m_handle;
        m_handle = NULL;
    }

    m_size = src.fhandle3_len;
    m_handle = new char[m_size];
    memcpy(m_handle, src.fhandle3_val, m_size);
    m_isInvalid = false;
    return *this;
}

NFSFileHandle& NFSFileHandle::operator=(const fhandle& src)
{
    if (m_handle != NULL) {
        delete [] m_handle;
        m_handle = NULL;
    }

    m_size = NFS_FHSIZE;
    m_handle = new char[m_size];
    memcpy(m_handle, src, m_size);
    m_isInvalid = false;
    return *this;
}

NFSFileHandle& NFSFileHandle::operator=(const nfs_fh3& src)
{
    if (m_handle != NULL) {
        delete [] m_handle;
        m_handle = NULL;
    }

    m_size = src.data.data_len;
    m_handle = new char[m_size];
    memcpy(m_handle, src.data.data_val, m_size);
    m_isInvalid = false;
    return *this;
}

NFSFileHandle& NFSFileHandle::operator=(const nfs_fh& src)
{
    if (m_handle != NULL) {
        delete [] m_handle;
        m_handle = NULL;
    }

    m_size = NFS_FHSIZE;
    m_handle = new char[m_size];
    memcpy(m_handle, src.data, m_size);
    m_isInvalid = false;
    return *this;
}

void NFSFileHandle::setLinkSource(const nfs_fh3& src)
{
    if (m_linkHandle != NULL) {
        delete [] m_linkHandle;
        m_linkHandle = NULL;
    }

    m_linkSize = src.data.data_len;
    m_linkHandle = new char[m_linkSize];
    memcpy(m_linkHandle, src.data.data_val, m_linkSize);
    m_isLink = true;
}

void NFSFileHandle::setLinkSource(const nfs_fh& src)
{
    if (m_linkHandle != NULL) {
        delete [] m_linkHandle;
        m_linkHandle = NULL;
    }

    m_linkSize = NFS_FHSIZE;
    m_linkHandle = new char[m_linkSize];
    memcpy(m_linkHandle, src.data, m_linkSize);
    m_isLink = true;
}


NFSProtocol::NFSProtocol(NFSSlave* slave)
    : m_slave(slave)
{

}

void NFSProtocol::copy(const QUrl& src, const QUrl& dest, int mode, KIO::JobFlags flags)
{
    if (src.isLocalFile()) {
        copyTo(src, dest, mode, flags);
    } else if (dest.isLocalFile()) {
        copyFrom(src, dest, mode, flags);
    } else {
        copySame(src, dest, mode, flags);
    }
}

void NFSProtocol::addExportedDir(const QString& path)
{
    m_exportedDirs.append(path);
}

const QStringList& NFSProtocol::getExportedDirs()
{
    return m_exportedDirs;
}

bool NFSProtocol::isExportedDir(const QString& path)
{
    // If the path is the root filesystem we always return true.
    if (QFileInfo(path).isRoot()) {
        return true;
    }

    for (QStringList::const_iterator it = m_exportedDirs.constBegin(); it != m_exportedDirs.constEnd(); ++it) {
        if (path.length() < (*it).length() && (*it).startsWith(path)) {
            QString rest = (*it).mid(path.length());
            if (rest.isEmpty() || rest[0] == QDir::separator()) {
                qCDebug(LOG_KIO_NFS) << "isExportedDir" << path << "returning true";

                return true;
            }
        }
    }

    return false;
}

void NFSProtocol::removeExportedDir(const QString& path)
{
    m_exportedDirs.removeOne(path);
}

void NFSProtocol::addFileHandle(const QString& path, NFSFileHandle fh)
{
    m_handleCache.insert(path, fh);
}

NFSFileHandle NFSProtocol::getFileHandle(const QString& path)
{
    if (!isConnected()) {
        return NFSFileHandle();
    }

    if (!isValidPath(path)) {
        qCDebug(LOG_KIO_NFS) << path << "is not a valid path";
        return NFSFileHandle();
    }

    // The handle may already be in the cache, check it now.
    // The exported dirs are always in the cache.
    if (m_handleCache.contains(path)) {
        return m_handleCache[path];
    }

    // Loop detected, abort.
    if (QFileInfo(path).path() == path) {
        return NFSFileHandle();
    }

    // Look up the file handle from the procotol
    NFSFileHandle childFH = lookupFileHandle(path);
    if (!childFH.isInvalid()) {
        m_handleCache.insert(path, childFH);
    }

    return childFH;
}

void NFSProtocol::removeFileHandle(const QString& path)
{
    m_handleCache.remove(path);
}

bool NFSProtocol::isValidPath(const QString& path)
{
    if (path.isEmpty() || path == QDir::separator()) {
        return true;
    }

    for (QStringList::const_iterator it = m_exportedDirs.constBegin(); it != m_exportedDirs.constEnd(); ++it) {
        if ((path.length() == (*it).length() && path.startsWith((*it))) || (path.startsWith((*it) + QDir::separator()))) {
            return true;
        }
    }

    return false;
}

bool NFSProtocol::isValidLink(const QString& parentDir, const QString& linkDest)
{
    if (linkDest.isEmpty()) {
        return false;
    }

    if (QFileInfo(linkDest).isAbsolute()) {
        return (!getFileHandle(linkDest).isInvalid());
    } else {
        QString absDest = QFileInfo(parentDir, linkDest).filePath();
        absDest = QDir::cleanPath(absDest);
        return (!getFileHandle(absDest).isInvalid());
    }

    return false;
}

int NFSProtocol::openConnection(const QString& host, int prog, int vers, CLIENT*& client, int& sock)
{
    if (host.isEmpty()) {
        return KIO::ERR_UNKNOWN_HOST;
    }
    struct sockaddr_in server_addr;
    if (host[0] >= '0' && host[0] <= '9') {
        server_addr.sin_family = AF_INET;
        server_addr.sin_addr.s_addr = inet_addr(host.toLatin1());
    } else {
        struct hostent* hp = gethostbyname(host.toLatin1());
        if (hp == 0) {
            return KIO::ERR_UNKNOWN_HOST;
        }
        server_addr.sin_family = AF_INET;
        memcpy(&server_addr.sin_addr, hp->h_addr, hp->h_length);
    }

    server_addr.sin_port = 0;

    sock = RPC_ANYSOCK;
    client = clnttcp_create(&server_addr, prog, vers, &sock, 0, 0);
    if (client == 0) {
        server_addr.sin_port = 0;
        sock = RPC_ANYSOCK;

        timeval pertry_timeout;
        pertry_timeout.tv_sec = 3;
        pertry_timeout.tv_usec = 0;
        client = clntudp_create(&server_addr, prog, vers, pertry_timeout, &sock);
        if (client == 0) {
            ::close(sock);
            return KIO::ERR_COULD_NOT_CONNECT;
        }
    }

    QString hostName = QHostInfo::localHostName();
    QString domainName = QHostInfo::localDomainName();
    if (!domainName.isEmpty()) {
        hostName = hostName + QLatin1Char('.') + domainName;
    }

    client->cl_auth = authunix_create(hostName.toUtf8().data(), geteuid(), getegid(), 0, 0);

    return 0;
}

bool NFSProtocol::checkForError(int clientStat, int nfsStat, const QString& text)
{
    if (clientStat != RPC_SUCCESS) {
        qCDebug(LOG_KIO_NFS) << "RPC error" << clientStat << text;

        m_slave->error(KIO::ERR_INTERNAL_SERVER, i18n("RPC error %1", clientStat));
        return false;
    }

    if (nfsStat != NFS_OK) {
        qCDebug(LOG_KIO_NFS) << "NFS error:" << nfsStat << text;
        switch (nfsStat) {
        case NFSERR_PERM:
            m_slave->error(KIO::ERR_ACCESS_DENIED, text);
            break;
        case NFSERR_NOENT:
            m_slave->error(KIO::ERR_DOES_NOT_EXIST, text);
            break;
        //does this mapping make sense ?
        case NFSERR_IO:
            m_slave->error(KIO::ERR_INTERNAL_SERVER, text);
            break;
        //does this mapping make sense ?
        case NFSERR_NXIO:
            m_slave->error(KIO::ERR_DOES_NOT_EXIST, text);
            break;
        case NFSERR_ACCES:
            m_slave->error(KIO::ERR_ACCESS_DENIED, text);
            break;
        case NFSERR_EXIST:
            m_slave->error(KIO::ERR_FILE_ALREADY_EXIST, text);
            break;
        //does this mapping make sense ?
        case NFSERR_NODEV:
            m_slave->error(KIO::ERR_DOES_NOT_EXIST, text);
            break;
        case NFSERR_NOTDIR:
            m_slave->error(KIO::ERR_IS_FILE, text);
            break;
        case NFSERR_ISDIR:
            m_slave->error(KIO::ERR_IS_DIRECTORY, text);
            break;
        //does this mapping make sense ?
        case NFSERR_FBIG:
            m_slave->error(KIO::ERR_INTERNAL_SERVER, text);
            break;
        //does this mapping make sense ?
        case NFSERR_NOSPC:
            m_slave->error(KIO::ERR_INTERNAL_SERVER, i18n("No space left on device"));
            break;
        case NFSERR_ROFS:
            m_slave->error(KIO::ERR_COULD_NOT_WRITE, i18n("Read only file system"));
            break;
        case NFSERR_NAMETOOLONG:
            m_slave->error(KIO::ERR_INTERNAL_SERVER, i18n("Filename too long"));
            break;
        case NFSERR_NOTEMPTY:
            m_slave->error(KIO::ERR_COULD_NOT_RMDIR, text);
            break;
        //does this mapping make sense ?
        case NFSERR_DQUOT:
            m_slave->error(KIO::ERR_INTERNAL_SERVER, i18n("Disk quota exceeded"));
            break;
        case NFSERR_STALE:
            m_slave->error(KIO::ERR_DOES_NOT_EXIST, text);
            break;
        default:
            m_slave->error(KIO::ERR_UNKNOWN, i18n("NFS error %1 - %2", nfsStat, text));
            break;
        }
        return false;
    }
    return true;
}

void NFSProtocol::createVirtualDirEntry(UDSEntry& entry)
{
    entry.insert(KIO::UDSEntry::UDS_FILE_TYPE, S_IFDIR);
    entry.insert(KIO::UDSEntry::UDS_MIME_TYPE, "inode/directory");
    entry.insert(KIO::UDSEntry::UDS_ACCESS, S_IRUSR | S_IXUSR | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH);
    entry.insert(KIO::UDSEntry::UDS_USER, QString::fromLatin1("root"));
    entry.insert(KIO::UDSEntry::UDS_GROUP, QString::fromLatin1("root"));
    // Dummy size.
    entry.insert(KIO::UDSEntry::UDS_SIZE, 0);
}

#include "moc_kio_nfs.cpp"