CommandListener.cpp revision 6947904a76b69a1db20a3ddd30c0bcd281922fde 
1/*
2 * Copyright (C) 2008 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include <stdlib.h>
18#include <sys/socket.h>
19#include <sys/types.h>
20#include <netinet/in.h>
21#include <arpa/inet.h>
22#include <dirent.h>
23#include <errno.h>
24#include <fcntl.h>
25#include <string.h>
26
27#define LOG_TAG "VoldCmdListener"
28#include <cutils/log.h>
29
30#include <sysutils/SocketClient.h>
31#include <private/android_filesystem_config.h>
32
33#include "CommandListener.h"
34#include "VolumeManager.h"
35#include "ResponseCode.h"
36#include "Process.h"
37#include "Xwarp.h"
38#include "Loop.h"
39#include "Devmapper.h"
40#include "cryptfs.h"
41
42CommandListener::CommandListener() :
43                 FrameworkListener("vold", true) {
44    registerCmd(new DumpCmd());
45    registerCmd(new VolumeCmd());
46    registerCmd(new AsecCmd());
47    registerCmd(new ObbCmd());
48    registerCmd(new StorageCmd());
49    registerCmd(new XwarpCmd());
50    registerCmd(new CryptfsCmd());
51}
52
53void CommandListener::dumpArgs(int argc, char **argv, int argObscure) {
54    char buffer[4096];
55    char *p = buffer;
56
57    memset(buffer, 0, sizeof(buffer));
58    int i;
59    for (i = 0; i < argc; i++) {
60        unsigned int len = strlen(argv[i]) + 1; // Account for space
61        if (i == argObscure) {
62            len += 2; // Account for {}
63        }
64        if (((p - buffer) + len) < (sizeof(buffer)-1)) {
65            if (i == argObscure) {
66                *p++ = '{';
67                *p++ = '}';
68                *p++ = ' ';
69                continue;
70            }
71            strcpy(p, argv[i]);
72            p+= strlen(argv[i]);
73            if (i != (argc -1)) {
74                *p++ = ' ';
75            }
76        }
77    }
78    SLOGD("%s", buffer);
79}
80
81CommandListener::DumpCmd::DumpCmd() :
82                 VoldCommand("dump") {
83}
84
85int CommandListener::DumpCmd::runCommand(SocketClient *cli,
86                                         int argc, char **argv) {
87    cli->sendMsg(0, "Dumping loop status", false);
88    if (Loop::dumpState(cli)) {
89        cli->sendMsg(ResponseCode::CommandOkay, "Loop dump failed", true);
90    }
91    cli->sendMsg(0, "Dumping DM status", false);
92    if (Devmapper::dumpState(cli)) {
93        cli->sendMsg(ResponseCode::CommandOkay, "Devmapper dump failed", true);
94    }
95    cli->sendMsg(0, "Dumping mounted filesystems", false);
96    FILE *fp = fopen("/proc/mounts", "r");
97    if (fp) {
98        char line[1024];
99        while (fgets(line, sizeof(line), fp)) {
100            line[strlen(line)-1] = '\0';
101            cli->sendMsg(0, line, false);;
102        }
103        fclose(fp);
104    }
105
106    cli->sendMsg(ResponseCode::CommandOkay, "dump complete", false);
107    return 0;
108}
109
110
111CommandListener::VolumeCmd::VolumeCmd() :
112                 VoldCommand("volume") {
113}
114
115int CommandListener::VolumeCmd::runCommand(SocketClient *cli,
116                                                      int argc, char **argv) {
117    dumpArgs(argc, argv, -1);
118
119    if (argc < 2) {
120        cli->sendMsg(ResponseCode::CommandSyntaxError, "Missing Argument", false);
121        return 0;
122    }
123
124    VolumeManager *vm = VolumeManager::Instance();
125    int rc = 0;
126
127    if (!strcmp(argv[1], "list")) {
128        return vm->listVolumes(cli);
129    } else if (!strcmp(argv[1], "debug")) {
130        if (argc != 3 || (argc == 3 && (strcmp(argv[2], "off") && strcmp(argv[2], "on")))) {
131            cli->sendMsg(ResponseCode::CommandSyntaxError, "Usage: volume debug <off/on>", false);
132            return 0;
133        }
134        vm->setDebug(!strcmp(argv[2], "on") ? true : false);
135    } else if (!strcmp(argv[1], "mount")) {
136        if (argc != 3) {
137            cli->sendMsg(ResponseCode::CommandSyntaxError, "Usage: volume mount <path>", false);
138            return 0;
139        }
140        rc = vm->mountVolume(argv[2]);
141    } else if (!strcmp(argv[1], "unmount")) {
142        if (argc < 3 || argc > 4 ||
143           ((argc == 4 && strcmp(argv[3], "force")) &&
144            (argc == 4 && strcmp(argv[3], "force_and_revert")))) {
145            cli->sendMsg(ResponseCode::CommandSyntaxError, "Usage: volume unmount <path> [force|force_and_revert]", false);
146            return 0;
147        }
148
149        bool force = false;
150        bool revert = false;
151        if (argc >= 4 && !strcmp(argv[3], "force")) {
152            force = true;
153        } else if (argc >= 4 && !strcmp(argv[3], "force_and_revert")) {
154            force = true;
155            revert = true;
156        }
157        rc = vm->unmountVolume(argv[2], force, revert);
158    } else if (!strcmp(argv[1], "format")) {
159        if (argc != 3) {
160            cli->sendMsg(ResponseCode::CommandSyntaxError, "Usage: volume format <path>", false);
161            return 0;
162        }
163        rc = vm->formatVolume(argv[2]);
164    } else if (!strcmp(argv[1], "share")) {
165        if (argc != 4) {
166            cli->sendMsg(ResponseCode::CommandSyntaxError,
167                    "Usage: volume share <path> <method>", false);
168            return 0;
169        }
170        rc = vm->shareVolume(argv[2], argv[3]);
171    } else if (!strcmp(argv[1], "unshare")) {
172        if (argc != 4) {
173            cli->sendMsg(ResponseCode::CommandSyntaxError,
174                    "Usage: volume unshare <path> <method>", false);
175            return 0;
176        }
177        rc = vm->unshareVolume(argv[2], argv[3]);
178    } else if (!strcmp(argv[1], "shared")) {
179        bool enabled = false;
180        if (argc != 4) {
181            cli->sendMsg(ResponseCode::CommandSyntaxError,
182                    "Usage: volume shared <path> <method>", false);
183            return 0;
184        }
185
186        if (vm->shareEnabled(argv[2], argv[3], &enabled)) {
187            cli->sendMsg(
188                    ResponseCode::OperationFailed, "Failed to determine share enable state", true);
189        } else {
190            cli->sendMsg(ResponseCode::ShareEnabledResult,
191                    (enabled ? "Share enabled" : "Share disabled"), false);
192        }
193        return 0;
194    } else {
195        cli->sendMsg(ResponseCode::CommandSyntaxError, "Unknown volume cmd", false);
196    }
197
198    if (!rc) {
199        cli->sendMsg(ResponseCode::CommandOkay, "volume operation succeeded", false);
200    } else {
201        int erno = errno;
202        rc = ResponseCode::convertFromErrno();
203        cli->sendMsg(rc, "volume operation failed", true);
204    }
205
206    return 0;
207}
208
209CommandListener::StorageCmd::StorageCmd() :
210                 VoldCommand("storage") {
211}
212
213int CommandListener::StorageCmd::runCommand(SocketClient *cli,
214                                                      int argc, char **argv) {
215    dumpArgs(argc, argv, -1);
216
217    if (argc < 2) {
218        cli->sendMsg(ResponseCode::CommandSyntaxError, "Missing Argument", false);
219        return 0;
220    }
221
222    if (!strcmp(argv[1], "users")) {
223        DIR *dir;
224        struct dirent *de;
225
226        if (!(dir = opendir("/proc"))) {
227            cli->sendMsg(ResponseCode::OperationFailed, "Failed to open /proc", true);
228            return 0;
229        }
230
231        while ((de = readdir(dir))) {
232            int pid = Process::getPid(de->d_name);
233
234            if (pid < 0) {
235                continue;
236            }
237
238            char processName[255];
239            Process::getProcessName(pid, processName, sizeof(processName));
240
241            if (Process::checkFileDescriptorSymLinks(pid, argv[2]) ||
242                Process::checkFileMaps(pid, argv[2]) ||
243                Process::checkSymLink(pid, argv[2], "cwd") ||
244                Process::checkSymLink(pid, argv[2], "root") ||
245                Process::checkSymLink(pid, argv[2], "exe")) {
246
247                char msg[1024];
248                snprintf(msg, sizeof(msg), "%d %s", pid, processName);
249                cli->sendMsg(ResponseCode::StorageUsersListResult, msg, false);
250            }
251        }
252        closedir(dir);
253        cli->sendMsg(ResponseCode::CommandOkay, "Storage user list complete", false);
254    } else {
255        cli->sendMsg(ResponseCode::CommandSyntaxError, "Unknown storage cmd", false);
256    }
257    return 0;
258}
259
260CommandListener::AsecCmd::AsecCmd() :
261                 VoldCommand("asec") {
262}
263
264void CommandListener::AsecCmd::listAsecsInDirectory(SocketClient *cli, const char *directory) {
265    DIR *d = opendir(directory);
266
267    if (!d) {
268        cli->sendMsg(ResponseCode::OperationFailed, "Failed to open asec dir", true);
269        return;
270    }
271
272    size_t dirent_len = offsetof(struct dirent, d_name) +
273            pathconf(directory, _PC_NAME_MAX) + 1;
274
275    struct dirent *dent = (struct dirent *) malloc(dirent_len);
276    if (dent == NULL) {
277        cli->sendMsg(ResponseCode::OperationFailed, "Failed to allocate memory", true);
278        return;
279    }
280
281    struct dirent *result;
282
283    while (!readdir_r(d, dent, &result) && result != NULL) {
284        if (dent->d_name[0] == '.')
285            continue;
286        if (dent->d_type != DT_REG)
287            continue;
288        size_t name_len = strlen(dent->d_name);
289        if (name_len > 5 && name_len < 260 &&
290                !strcmp(&dent->d_name[name_len - 5], ".asec")) {
291            char id[255];
292            memset(id, 0, sizeof(id));
293            strlcpy(id, dent->d_name, name_len - 4);
294            cli->sendMsg(ResponseCode::AsecListResult, id, false);
295        }
296    }
297    closedir(d);
298
299    free(dent);
300}
301
302int CommandListener::AsecCmd::runCommand(SocketClient *cli,
303                                                      int argc, char **argv) {
304    if (argc < 2) {
305        cli->sendMsg(ResponseCode::CommandSyntaxError, "Missing Argument", false);
306        return 0;
307    }
308
309    VolumeManager *vm = VolumeManager::Instance();
310    int rc = 0;
311
312    if (!strcmp(argv[1], "list")) {
313        dumpArgs(argc, argv, -1);
314
315        listAsecsInDirectory(cli, Volume::SEC_ASECDIR_EXT);
316        listAsecsInDirectory(cli, Volume::SEC_ASECDIR_INT);
317    } else if (!strcmp(argv[1], "create")) {
318        dumpArgs(argc, argv, 5);
319        if (argc != 8) {
320            cli->sendMsg(ResponseCode::CommandSyntaxError,
321                    "Usage: asec create <container-id> <size_mb> <fstype> <key> <ownerUid> "
322                    "<isExternal>", false);
323            return 0;
324        }
325
326        unsigned int numSectors = (atoi(argv[3]) * (1024 * 1024)) / 512;
327        const bool isExternal = (atoi(argv[7]) == 1);
328        rc = vm->createAsec(argv[2], numSectors, argv[4], argv[5], atoi(argv[6]), isExternal);
329    } else if (!strcmp(argv[1], "finalize")) {
330        dumpArgs(argc, argv, -1);
331        if (argc != 3) {
332            cli->sendMsg(ResponseCode::CommandSyntaxError, "Usage: asec finalize <container-id>", false);
333            return 0;
334        }
335        rc = vm->finalizeAsec(argv[2]);
336    } else if (!strcmp(argv[1], "fixperms")) {
337        dumpArgs(argc, argv, -1);
338        if  (argc != 5) {
339            cli->sendMsg(ResponseCode::CommandSyntaxError, "Usage: asec fixperms <container-id> <gid> <filename>", false);
340            return 0;
341        }
342
343        char *endptr;
344        gid_t gid = (gid_t) strtoul(argv[3], &endptr, 10);
345        if (*endptr != '\0') {
346            cli->sendMsg(ResponseCode::CommandSyntaxError, "Usage: asec fixperms <container-id> <gid> <filename>", false);
347            return 0;
348        }
349
350        rc = vm->fixupAsecPermissions(argv[2], gid, argv[4]);
351    } else if (!strcmp(argv[1], "destroy")) {
352        dumpArgs(argc, argv, -1);
353        if (argc < 3) {
354            cli->sendMsg(ResponseCode::CommandSyntaxError, "Usage: asec destroy <container-id> [force]", false);
355            return 0;
356        }
357        bool force = false;
358        if (argc > 3 && !strcmp(argv[3], "force")) {
359            force = true;
360        }
361        rc = vm->destroyAsec(argv[2], force);
362    } else if (!strcmp(argv[1], "mount")) {
363        dumpArgs(argc, argv, 3);
364        if (argc != 5) {
365            cli->sendMsg(ResponseCode::CommandSyntaxError,
366                    "Usage: asec mount <namespace-id> <key> <ownerUid>", false);
367            return 0;
368        }
369        rc = vm->mountAsec(argv[2], argv[3], atoi(argv[4]));
370    } else if (!strcmp(argv[1], "unmount")) {
371        dumpArgs(argc, argv, -1);
372        if (argc < 3) {
373            cli->sendMsg(ResponseCode::CommandSyntaxError, "Usage: asec unmount <container-id> [force]", false);
374            return 0;
375        }
376        bool force = false;
377        if (argc > 3 && !strcmp(argv[3], "force")) {
378            force = true;
379        }
380        rc = vm->unmountAsec(argv[2], force);
381    } else if (!strcmp(argv[1], "rename")) {
382        dumpArgs(argc, argv, -1);
383        if (argc != 4) {
384            cli->sendMsg(ResponseCode::CommandSyntaxError,
385                    "Usage: asec rename <old_id> <new_id>", false);
386            return 0;
387        }
388        rc = vm->renameAsec(argv[2], argv[3]);
389    } else if (!strcmp(argv[1], "path")) {
390        dumpArgs(argc, argv, -1);
391        if (argc != 3) {
392            cli->sendMsg(ResponseCode::CommandSyntaxError, "Usage: asec path <container-id>", false);
393            return 0;
394        }
395        char path[255];
396
397        if (!(rc = vm->getAsecMountPath(argv[2], path, sizeof(path)))) {
398            cli->sendMsg(ResponseCode::AsecPathResult, path, false);
399            return 0;
400        }
401    } else if (!strcmp(argv[1], "fspath")) {
402        dumpArgs(argc, argv, -1);
403        if (argc != 3) {
404            cli->sendMsg(ResponseCode::CommandSyntaxError, "Usage: asec fspath <container-id>", false);
405            return 0;
406        }
407        char path[255];
408
409        if (!(rc = vm->getAsecFilesystemPath(argv[2], path, sizeof(path)))) {
410            cli->sendMsg(ResponseCode::AsecPathResult, path, false);
411            return 0;
412        }
413    } else {
414        dumpArgs(argc, argv, -1);
415        cli->sendMsg(ResponseCode::CommandSyntaxError, "Unknown asec cmd", false);
416    }
417
418    if (!rc) {
419        cli->sendMsg(ResponseCode::CommandOkay, "asec operation succeeded", false);
420    } else {
421        rc = ResponseCode::convertFromErrno();
422        cli->sendMsg(rc, "asec operation failed", true);
423    }
424
425    return 0;
426}
427
428CommandListener::ObbCmd::ObbCmd() :
429                 VoldCommand("obb") {
430}
431
432int CommandListener::ObbCmd::runCommand(SocketClient *cli,
433                                                      int argc, char **argv) {
434    if (argc < 2) {
435        cli->sendMsg(ResponseCode::CommandSyntaxError, "Missing Argument", false);
436        return 0;
437    }
438
439    VolumeManager *vm = VolumeManager::Instance();
440    int rc = 0;
441
442    if (!strcmp(argv[1], "list")) {
443        dumpArgs(argc, argv, -1);
444
445        rc = vm->listMountedObbs(cli);
446    } else if (!strcmp(argv[1], "mount")) {
447            dumpArgs(argc, argv, 3);
448            if (argc != 5) {
449                cli->sendMsg(ResponseCode::CommandSyntaxError,
450                        "Usage: obb mount <filename> <key> <ownerGid>", false);
451                return 0;
452            }
453            rc = vm->mountObb(argv[2], argv[3], atoi(argv[4]));
454    } else if (!strcmp(argv[1], "unmount")) {
455        dumpArgs(argc, argv, -1);
456        if (argc < 3) {
457            cli->sendMsg(ResponseCode::CommandSyntaxError, "Usage: obb unmount <source file> [force]", false);
458            return 0;
459        }
460        bool force = false;
461        if (argc > 3 && !strcmp(argv[3], "force")) {
462            force = true;
463        }
464        rc = vm->unmountObb(argv[2], force);
465    } else if (!strcmp(argv[1], "path")) {
466        dumpArgs(argc, argv, -1);
467        if (argc != 3) {
468            cli->sendMsg(ResponseCode::CommandSyntaxError, "Usage: obb path <source file>", false);
469            return 0;
470        }
471        char path[255];
472
473        if (!(rc = vm->getObbMountPath(argv[2], path, sizeof(path)))) {
474            cli->sendMsg(ResponseCode::AsecPathResult, path, false);
475            return 0;
476        }
477    } else {
478        dumpArgs(argc, argv, -1);
479        cli->sendMsg(ResponseCode::CommandSyntaxError, "Unknown obb cmd", false);
480    }
481
482    if (!rc) {
483        cli->sendMsg(ResponseCode::CommandOkay, "obb operation succeeded", false);
484    } else {
485        rc = ResponseCode::convertFromErrno();
486        cli->sendMsg(rc, "obb operation failed", true);
487    }
488
489    return 0;
490}
491
492CommandListener::XwarpCmd::XwarpCmd() :
493                 VoldCommand("xwarp") {
494}
495
496int CommandListener::XwarpCmd::runCommand(SocketClient *cli,
497                                                      int argc, char **argv) {
498    if (argc < 2) {
499        cli->sendMsg(ResponseCode::CommandSyntaxError, "Missing Argument", false);
500        return 0;
501    }
502
503    if (!strcmp(argv[1], "enable")) {
504        if (Xwarp::enable()) {
505            cli->sendMsg(ResponseCode::OperationFailed, "Failed to enable xwarp", true);
506            return 0;
507        }
508
509        cli->sendMsg(ResponseCode::CommandOkay, "Xwarp mirroring started", false);
510    } else if (!strcmp(argv[1], "disable")) {
511        if (Xwarp::disable()) {
512            cli->sendMsg(ResponseCode::OperationFailed, "Failed to disable xwarp", true);
513            return 0;
514        }
515
516        cli->sendMsg(ResponseCode::CommandOkay, "Xwarp disabled", false);
517    } else if (!strcmp(argv[1], "status")) {
518        char msg[255];
519        bool r;
520        unsigned mirrorPos, maxSize;
521
522        if (Xwarp::status(&r, &mirrorPos, &maxSize)) {
523            cli->sendMsg(ResponseCode::OperationFailed, "Failed to get xwarp status", true);
524            return 0;
525        }
526        snprintf(msg, sizeof(msg), "%s %u %u", (r ? "ready" : "not-ready"), mirrorPos, maxSize);
527        cli->sendMsg(ResponseCode::XwarpStatusResult, msg, false);
528    } else {
529        cli->sendMsg(ResponseCode::CommandSyntaxError, "Unknown storage cmd", false);
530    }
531
532    return 0;
533}
534
535CommandListener::CryptfsCmd::CryptfsCmd() :
536                 VoldCommand("cryptfs") {
537}
538
539int CommandListener::CryptfsCmd::runCommand(SocketClient *cli,
540                                                      int argc, char **argv) {
541    if ((cli->getUid() != 0) && (cli->getUid() != AID_SYSTEM)) {
542        cli->sendMsg(ResponseCode::CommandNoPermission, "No permission to run cryptfs commands", false);
543        return 0;
544    }
545
546    if (argc < 2) {
547        cli->sendMsg(ResponseCode::CommandSyntaxError, "Missing Argument", false);
548        return 0;
549    }
550
551    int rc = 0;
552
553    if (!strcmp(argv[1], "checkpw")) {
554        if (argc != 3) {
555            cli->sendMsg(ResponseCode::CommandSyntaxError, "Usage: cryptfs checkpw <passwd>", false);
556            return 0;
557        }
558        dumpArgs(argc, argv, 2);
559        rc = cryptfs_check_passwd(argv[2]);
560    } else if (!strcmp(argv[1], "restart")) {
561        if (argc != 2) {
562            cli->sendMsg(ResponseCode::CommandSyntaxError, "Usage: cryptfs restart", false);
563            return 0;
564        }
565        dumpArgs(argc, argv, -1);
566        rc = cryptfs_restart();
567    } else if (!strcmp(argv[1], "cryptocomplete")) {
568        if (argc != 2) {
569            cli->sendMsg(ResponseCode::CommandSyntaxError, "Usage: cryptfs cryptocomplete", false);
570            return 0;
571        }
572        dumpArgs(argc, argv, -1);
573        rc = cryptfs_crypto_complete();
574    } else if (!strcmp(argv[1], "enablecrypto")) {
575        if ( (argc != 4) || (strcmp(argv[2], "wipe") && strcmp(argv[2], "inplace")) ) {
576            cli->sendMsg(ResponseCode::CommandSyntaxError, "Usage: cryptfs enablecrypto <wipe|inplace> <passwd>", false);
577            return 0;
578        }
579        dumpArgs(argc, argv, 3);
580        rc = cryptfs_enable(argv[2], argv[3]);
581    } else if (!strcmp(argv[1], "changepw")) {
582        if (argc != 3) {
583            cli->sendMsg(ResponseCode::CommandSyntaxError, "Usage: cryptfs changepw <newpasswd>", false);
584            return 0;
585        }
586        SLOGD("cryptfs changepw {}");
587        rc = cryptfs_changepw(argv[2]);
588    } else if (!strcmp(argv[1], "verifypw")) {
589        if (argc != 3) {
590            cli->sendMsg(ResponseCode::CommandSyntaxError, "Usage: cryptfs verifypw <passwd>", false);
591            return 0;
592        }
593        SLOGD("cryptfs verifypw {}");
594        rc = cryptfs_verify_passwd(argv[2]);
595    } else {
596        dumpArgs(argc, argv, -1);
597        cli->sendMsg(ResponseCode::CommandSyntaxError, "Unknown cryptfs cmd", false);
598    }
599
600    // Always report that the command succeeded and return the error code.
601    // The caller will check the return value to see what the error was.
602    char msg[255];
603    snprintf(msg, sizeof(msg), "%d", rc);
604    cli->sendMsg(ResponseCode::CommandOkay, msg, false);
605
606    return 0;
607}
608