1c216e5adSMichael Roth /* 2c216e5adSMichael Roth * QEMU Guest Agent POSIX-specific command implementations 3c216e5adSMichael Roth * 4c216e5adSMichael Roth * Copyright IBM Corp. 2011 5c216e5adSMichael Roth * 6c216e5adSMichael Roth * Authors: 7c216e5adSMichael Roth * Michael Roth <mdroth@linux.vnet.ibm.com> 83424fc9fSMichal Privoznik * Michal Privoznik <mprivozn@redhat.com> 9c216e5adSMichael Roth * 10c216e5adSMichael Roth * This work is licensed under the terms of the GNU GPL, version 2 or later. 11c216e5adSMichael Roth * See the COPYING file in the top-level directory. 12c216e5adSMichael Roth */ 13c216e5adSMichael Roth 14c216e5adSMichael Roth #include <glib.h> 15c216e5adSMichael Roth #include <sys/types.h> 16c216e5adSMichael Roth #include <sys/ioctl.h> 172c02cbf6SLuiz Capitulino #include <sys/wait.h> 18d2baff62SLaszlo Ersek #include <unistd.h> 19d2baff62SLaszlo Ersek #include <errno.h> 20d2baff62SLaszlo Ersek #include <fcntl.h> 21c689b4f1SLaszlo Ersek #include <stdio.h> 22c689b4f1SLaszlo Ersek #include <string.h> 23c689b4f1SLaszlo Ersek #include <sys/stat.h> 24d2baff62SLaszlo Ersek #include <inttypes.h> 25c216e5adSMichael Roth #include "qga/guest-agent-core.h" 26c216e5adSMichael Roth #include "qga-qmp-commands.h" 277b1b5d19SPaolo Bonzini #include "qapi/qmp/qerror.h" 281de7afc9SPaolo Bonzini #include "qemu/queue.h" 291de7afc9SPaolo Bonzini #include "qemu/host-utils.h" 30c216e5adSMichael Roth 312c02cbf6SLuiz Capitulino #ifndef CONFIG_HAS_ENVIRON 32eecae147SAndreas Färber #ifdef __APPLE__ 33eecae147SAndreas Färber #include <crt_externs.h> 34eecae147SAndreas Färber #define environ (*_NSGetEnviron()) 35eecae147SAndreas Färber #else 362c02cbf6SLuiz Capitulino extern char **environ; 372c02cbf6SLuiz Capitulino #endif 38eecae147SAndreas Färber #endif 392c02cbf6SLuiz Capitulino 40e72c3f2eSMichael Roth #if defined(__linux__) 41e72c3f2eSMichael Roth #include <mntent.h> 42e72c3f2eSMichael Roth #include <linux/fs.h> 43e72c3f2eSMichael Roth #include <ifaddrs.h> 44e72c3f2eSMichael Roth #include <arpa/inet.h> 45e72c3f2eSMichael Roth #include <sys/socket.h> 46e72c3f2eSMichael Roth #include <net/if.h> 47e72c3f2eSMichael Roth 48eab5fd59SPaolo Bonzini #ifdef FIFREEZE 49e72c3f2eSMichael Roth #define CONFIG_FSFREEZE 50e72c3f2eSMichael Roth #endif 51eab5fd59SPaolo Bonzini #ifdef FITRIM 52eab5fd59SPaolo Bonzini #define CONFIG_FSTRIM 53eab5fd59SPaolo Bonzini #endif 54e72c3f2eSMichael Roth #endif 55e72c3f2eSMichael Roth 56d220a6dfSLuiz Capitulino static void ga_wait_child(pid_t pid, int *status, Error **err) 57d220a6dfSLuiz Capitulino { 58d220a6dfSLuiz Capitulino pid_t rpid; 59d220a6dfSLuiz Capitulino 60d220a6dfSLuiz Capitulino *status = 0; 61d220a6dfSLuiz Capitulino 62d220a6dfSLuiz Capitulino do { 63d220a6dfSLuiz Capitulino rpid = waitpid(pid, status, 0); 64d220a6dfSLuiz Capitulino } while (rpid == -1 && errno == EINTR); 65d220a6dfSLuiz Capitulino 66d220a6dfSLuiz Capitulino if (rpid == -1) { 67d220a6dfSLuiz Capitulino error_setg_errno(err, errno, "failed to wait for child (pid: %d)", pid); 68d220a6dfSLuiz Capitulino return; 69d220a6dfSLuiz Capitulino } 70d220a6dfSLuiz Capitulino 71d220a6dfSLuiz Capitulino g_assert(rpid == pid); 72d220a6dfSLuiz Capitulino } 73d220a6dfSLuiz Capitulino 74c216e5adSMichael Roth void qmp_guest_shutdown(bool has_mode, const char *mode, Error **err) 75c216e5adSMichael Roth { 76c216e5adSMichael Roth const char *shutdown_flag; 77d220a6dfSLuiz Capitulino Error *local_err = NULL; 78d220a6dfSLuiz Capitulino pid_t pid; 793674838cSLuiz Capitulino int status; 80c216e5adSMichael Roth 81c216e5adSMichael Roth slog("guest-shutdown called, mode: %s", mode); 82c216e5adSMichael Roth if (!has_mode || strcmp(mode, "powerdown") == 0) { 83c216e5adSMichael Roth shutdown_flag = "-P"; 84c216e5adSMichael Roth } else if (strcmp(mode, "halt") == 0) { 85c216e5adSMichael Roth shutdown_flag = "-H"; 86c216e5adSMichael Roth } else if (strcmp(mode, "reboot") == 0) { 87c216e5adSMichael Roth shutdown_flag = "-r"; 88c216e5adSMichael Roth } else { 89d220a6dfSLuiz Capitulino error_setg(err, 90d220a6dfSLuiz Capitulino "mode is invalid (valid values are: halt|powerdown|reboot"); 91c216e5adSMichael Roth return; 92c216e5adSMichael Roth } 93c216e5adSMichael Roth 94d5dd3498SLuiz Capitulino pid = fork(); 95d5dd3498SLuiz Capitulino if (pid == 0) { 96c216e5adSMichael Roth /* child, start the shutdown */ 97c216e5adSMichael Roth setsid(); 983674838cSLuiz Capitulino reopen_fd_to_null(0); 993674838cSLuiz Capitulino reopen_fd_to_null(1); 1003674838cSLuiz Capitulino reopen_fd_to_null(2); 101c216e5adSMichael Roth 1023674838cSLuiz Capitulino execle("/sbin/shutdown", "shutdown", shutdown_flag, "+0", 1033674838cSLuiz Capitulino "hypervisor initiated shutdown", (char*)NULL, environ); 1043674838cSLuiz Capitulino _exit(EXIT_FAILURE); 105d5dd3498SLuiz Capitulino } else if (pid < 0) { 106d220a6dfSLuiz Capitulino error_setg_errno(err, errno, "failed to create child process"); 107d5dd3498SLuiz Capitulino return; 108d5dd3498SLuiz Capitulino } 109d5dd3498SLuiz Capitulino 110d220a6dfSLuiz Capitulino ga_wait_child(pid, &status, &local_err); 111d220a6dfSLuiz Capitulino if (error_is_set(&local_err)) { 112d220a6dfSLuiz Capitulino error_propagate(err, local_err); 113d220a6dfSLuiz Capitulino return; 114d220a6dfSLuiz Capitulino } 115d220a6dfSLuiz Capitulino 116d220a6dfSLuiz Capitulino if (!WIFEXITED(status)) { 117d220a6dfSLuiz Capitulino error_setg(err, "child process has terminated abnormally"); 118d220a6dfSLuiz Capitulino return; 119d220a6dfSLuiz Capitulino } 120d220a6dfSLuiz Capitulino 121d220a6dfSLuiz Capitulino if (WEXITSTATUS(status)) { 122d220a6dfSLuiz Capitulino error_setg(err, "child process has failed to shutdown"); 123d220a6dfSLuiz Capitulino return; 124d220a6dfSLuiz Capitulino } 125d220a6dfSLuiz Capitulino 126085d8134SPeter Maydell /* succeeded */ 127c216e5adSMichael Roth } 128c216e5adSMichael Roth 1296912e6a9SLei Li int64_t qmp_guest_get_time(Error **errp) 1306912e6a9SLei Li { 1316912e6a9SLei Li int ret; 1326912e6a9SLei Li qemu_timeval tq; 1336912e6a9SLei Li int64_t time_ns; 1346912e6a9SLei Li 1356912e6a9SLei Li ret = qemu_gettimeofday(&tq); 1366912e6a9SLei Li if (ret < 0) { 1376912e6a9SLei Li error_setg_errno(errp, errno, "Failed to get time"); 1386912e6a9SLei Li return -1; 1396912e6a9SLei Li } 1406912e6a9SLei Li 1416912e6a9SLei Li time_ns = tq.tv_sec * 1000000000LL + tq.tv_usec * 1000; 1426912e6a9SLei Li return time_ns; 1436912e6a9SLei Li } 1446912e6a9SLei Li 145a1bca57fSLei Li void qmp_guest_set_time(int64_t time_ns, Error **errp) 146a1bca57fSLei Li { 147a1bca57fSLei Li int ret; 148a1bca57fSLei Li int status; 149a1bca57fSLei Li pid_t pid; 150a1bca57fSLei Li Error *local_err = NULL; 151a1bca57fSLei Li struct timeval tv; 152a1bca57fSLei Li 153a1bca57fSLei Li /* year-2038 will overflow in case time_t is 32bit */ 154a1bca57fSLei Li if (time_ns / 1000000000 != (time_t)(time_ns / 1000000000)) { 155a1bca57fSLei Li error_setg(errp, "Time %" PRId64 " is too large", time_ns); 156a1bca57fSLei Li return; 157a1bca57fSLei Li } 158a1bca57fSLei Li 159a1bca57fSLei Li tv.tv_sec = time_ns / 1000000000; 160a1bca57fSLei Li tv.tv_usec = (time_ns % 1000000000) / 1000; 161a1bca57fSLei Li 162a1bca57fSLei Li ret = settimeofday(&tv, NULL); 163a1bca57fSLei Li if (ret < 0) { 164a1bca57fSLei Li error_setg_errno(errp, errno, "Failed to set time to guest"); 165a1bca57fSLei Li return; 166a1bca57fSLei Li } 167a1bca57fSLei Li 168a1bca57fSLei Li /* Set the Hardware Clock to the current System Time. */ 169a1bca57fSLei Li pid = fork(); 170a1bca57fSLei Li if (pid == 0) { 171a1bca57fSLei Li setsid(); 172a1bca57fSLei Li reopen_fd_to_null(0); 173a1bca57fSLei Li reopen_fd_to_null(1); 174a1bca57fSLei Li reopen_fd_to_null(2); 175a1bca57fSLei Li 176a1bca57fSLei Li execle("/sbin/hwclock", "hwclock", "-w", NULL, environ); 177a1bca57fSLei Li _exit(EXIT_FAILURE); 178a1bca57fSLei Li } else if (pid < 0) { 179a1bca57fSLei Li error_setg_errno(errp, errno, "failed to create child process"); 180a1bca57fSLei Li return; 181a1bca57fSLei Li } 182a1bca57fSLei Li 183a1bca57fSLei Li ga_wait_child(pid, &status, &local_err); 184a1bca57fSLei Li if (error_is_set(&local_err)) { 185a1bca57fSLei Li error_propagate(errp, local_err); 186a1bca57fSLei Li return; 187a1bca57fSLei Li } 188a1bca57fSLei Li 189a1bca57fSLei Li if (!WIFEXITED(status)) { 190a1bca57fSLei Li error_setg(errp, "child process has terminated abnormally"); 191a1bca57fSLei Li return; 192a1bca57fSLei Li } 193a1bca57fSLei Li 194a1bca57fSLei Li if (WEXITSTATUS(status)) { 195a1bca57fSLei Li error_setg(errp, "hwclock failed to set hardware clock to system time"); 196a1bca57fSLei Li return; 197a1bca57fSLei Li } 198a1bca57fSLei Li } 199a1bca57fSLei Li 200c216e5adSMichael Roth typedef struct GuestFileHandle { 201c216e5adSMichael Roth uint64_t id; 202c216e5adSMichael Roth FILE *fh; 203c216e5adSMichael Roth QTAILQ_ENTRY(GuestFileHandle) next; 204c216e5adSMichael Roth } GuestFileHandle; 205c216e5adSMichael Roth 206c216e5adSMichael Roth static struct { 207c216e5adSMichael Roth QTAILQ_HEAD(, GuestFileHandle) filehandles; 208c216e5adSMichael Roth } guest_file_state; 209c216e5adSMichael Roth 21039097dafSMichael Roth static int64_t guest_file_handle_add(FILE *fh, Error **errp) 211c216e5adSMichael Roth { 212c216e5adSMichael Roth GuestFileHandle *gfh; 21339097dafSMichael Roth int64_t handle; 21439097dafSMichael Roth 21539097dafSMichael Roth handle = ga_get_fd_handle(ga_state, errp); 21639097dafSMichael Roth if (error_is_set(errp)) { 21739097dafSMichael Roth return 0; 21839097dafSMichael Roth } 219c216e5adSMichael Roth 220c216e5adSMichael Roth gfh = g_malloc0(sizeof(GuestFileHandle)); 22139097dafSMichael Roth gfh->id = handle; 222c216e5adSMichael Roth gfh->fh = fh; 223c216e5adSMichael Roth QTAILQ_INSERT_TAIL(&guest_file_state.filehandles, gfh, next); 22439097dafSMichael Roth 22539097dafSMichael Roth return handle; 226c216e5adSMichael Roth } 227c216e5adSMichael Roth 228a9de6d01SLuiz Capitulino static GuestFileHandle *guest_file_handle_find(int64_t id, Error **err) 229c216e5adSMichael Roth { 230c216e5adSMichael Roth GuestFileHandle *gfh; 231c216e5adSMichael Roth 232c216e5adSMichael Roth QTAILQ_FOREACH(gfh, &guest_file_state.filehandles, next) 233c216e5adSMichael Roth { 234c216e5adSMichael Roth if (gfh->id == id) { 235c216e5adSMichael Roth return gfh; 236c216e5adSMichael Roth } 237c216e5adSMichael Roth } 238c216e5adSMichael Roth 239a9de6d01SLuiz Capitulino error_setg(err, "handle '%" PRId64 "' has not been found", id); 240c216e5adSMichael Roth return NULL; 241c216e5adSMichael Roth } 242c216e5adSMichael Roth 243c689b4f1SLaszlo Ersek typedef const char * const ccpc; 244c689b4f1SLaszlo Ersek 245*8fe6bbcaSLaszlo Ersek #ifndef O_BINARY 246*8fe6bbcaSLaszlo Ersek #define O_BINARY 0 247*8fe6bbcaSLaszlo Ersek #endif 248*8fe6bbcaSLaszlo Ersek 249c689b4f1SLaszlo Ersek /* http://pubs.opengroup.org/onlinepubs/9699919799/functions/fopen.html */ 250c689b4f1SLaszlo Ersek static const struct { 251c689b4f1SLaszlo Ersek ccpc *forms; 252c689b4f1SLaszlo Ersek int oflag_base; 253c689b4f1SLaszlo Ersek } guest_file_open_modes[] = { 254*8fe6bbcaSLaszlo Ersek { (ccpc[]){ "r", NULL }, O_RDONLY }, 255*8fe6bbcaSLaszlo Ersek { (ccpc[]){ "rb", NULL }, O_RDONLY | O_BINARY }, 256*8fe6bbcaSLaszlo Ersek { (ccpc[]){ "w", NULL }, O_WRONLY | O_CREAT | O_TRUNC }, 257*8fe6bbcaSLaszlo Ersek { (ccpc[]){ "wb", NULL }, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY }, 258*8fe6bbcaSLaszlo Ersek { (ccpc[]){ "a", NULL }, O_WRONLY | O_CREAT | O_APPEND }, 259*8fe6bbcaSLaszlo Ersek { (ccpc[]){ "ab", NULL }, O_WRONLY | O_CREAT | O_APPEND | O_BINARY }, 260*8fe6bbcaSLaszlo Ersek { (ccpc[]){ "r+", NULL }, O_RDWR }, 261*8fe6bbcaSLaszlo Ersek { (ccpc[]){ "rb+", "r+b", NULL }, O_RDWR | O_BINARY }, 262*8fe6bbcaSLaszlo Ersek { (ccpc[]){ "w+", NULL }, O_RDWR | O_CREAT | O_TRUNC }, 263*8fe6bbcaSLaszlo Ersek { (ccpc[]){ "wb+", "w+b", NULL }, O_RDWR | O_CREAT | O_TRUNC | O_BINARY }, 264*8fe6bbcaSLaszlo Ersek { (ccpc[]){ "a+", NULL }, O_RDWR | O_CREAT | O_APPEND }, 265*8fe6bbcaSLaszlo Ersek { (ccpc[]){ "ab+", "a+b", NULL }, O_RDWR | O_CREAT | O_APPEND | O_BINARY } 266c689b4f1SLaszlo Ersek }; 267c689b4f1SLaszlo Ersek 268c689b4f1SLaszlo Ersek static int 269c689b4f1SLaszlo Ersek find_open_flag(const char *mode_str, Error **err) 270c689b4f1SLaszlo Ersek { 271c689b4f1SLaszlo Ersek unsigned mode; 272c689b4f1SLaszlo Ersek 273c689b4f1SLaszlo Ersek for (mode = 0; mode < ARRAY_SIZE(guest_file_open_modes); ++mode) { 274c689b4f1SLaszlo Ersek ccpc *form; 275c689b4f1SLaszlo Ersek 276c689b4f1SLaszlo Ersek form = guest_file_open_modes[mode].forms; 277c689b4f1SLaszlo Ersek while (*form != NULL && strcmp(*form, mode_str) != 0) { 278c689b4f1SLaszlo Ersek ++form; 279c689b4f1SLaszlo Ersek } 280c689b4f1SLaszlo Ersek if (*form != NULL) { 281c689b4f1SLaszlo Ersek break; 282c689b4f1SLaszlo Ersek } 283c689b4f1SLaszlo Ersek } 284c689b4f1SLaszlo Ersek 285c689b4f1SLaszlo Ersek if (mode == ARRAY_SIZE(guest_file_open_modes)) { 286c689b4f1SLaszlo Ersek error_setg(err, "invalid file open mode '%s'", mode_str); 287c689b4f1SLaszlo Ersek return -1; 288c689b4f1SLaszlo Ersek } 289c689b4f1SLaszlo Ersek return guest_file_open_modes[mode].oflag_base | O_NOCTTY | O_NONBLOCK; 290c689b4f1SLaszlo Ersek } 291c689b4f1SLaszlo Ersek 292c689b4f1SLaszlo Ersek #define DEFAULT_NEW_FILE_MODE (S_IRUSR | S_IWUSR | \ 293c689b4f1SLaszlo Ersek S_IRGRP | S_IWGRP | \ 294c689b4f1SLaszlo Ersek S_IROTH | S_IWOTH) 295c689b4f1SLaszlo Ersek 296c689b4f1SLaszlo Ersek static FILE * 297c689b4f1SLaszlo Ersek safe_open_or_create(const char *path, const char *mode, Error **err) 298c689b4f1SLaszlo Ersek { 299c689b4f1SLaszlo Ersek Error *local_err = NULL; 300c689b4f1SLaszlo Ersek int oflag; 301c689b4f1SLaszlo Ersek 302c689b4f1SLaszlo Ersek oflag = find_open_flag(mode, &local_err); 303c689b4f1SLaszlo Ersek if (local_err == NULL) { 304c689b4f1SLaszlo Ersek int fd; 305c689b4f1SLaszlo Ersek 306c689b4f1SLaszlo Ersek /* If the caller wants / allows creation of a new file, we implement it 307c689b4f1SLaszlo Ersek * with a two step process: open() + (open() / fchmod()). 308c689b4f1SLaszlo Ersek * 309c689b4f1SLaszlo Ersek * First we insist on creating the file exclusively as a new file. If 310c689b4f1SLaszlo Ersek * that succeeds, we're free to set any file-mode bits on it. (The 311c689b4f1SLaszlo Ersek * motivation is that we want to set those file-mode bits independently 312c689b4f1SLaszlo Ersek * of the current umask.) 313c689b4f1SLaszlo Ersek * 314c689b4f1SLaszlo Ersek * If the exclusive creation fails because the file already exists 315c689b4f1SLaszlo Ersek * (EEXIST is not possible for any other reason), we just attempt to 316c689b4f1SLaszlo Ersek * open the file, but in this case we won't be allowed to change the 317c689b4f1SLaszlo Ersek * file-mode bits on the preexistent file. 318c689b4f1SLaszlo Ersek * 319c689b4f1SLaszlo Ersek * The pathname should never disappear between the two open()s in 320c689b4f1SLaszlo Ersek * practice. If it happens, then someone very likely tried to race us. 321c689b4f1SLaszlo Ersek * In this case just go ahead and report the ENOENT from the second 322c689b4f1SLaszlo Ersek * open() to the caller. 323c689b4f1SLaszlo Ersek * 324c689b4f1SLaszlo Ersek * If the caller wants to open a preexistent file, then the first 325c689b4f1SLaszlo Ersek * open() is decisive and its third argument is ignored, and the second 326c689b4f1SLaszlo Ersek * open() and the fchmod() are never called. 327c689b4f1SLaszlo Ersek */ 328c689b4f1SLaszlo Ersek fd = open(path, oflag | ((oflag & O_CREAT) ? O_EXCL : 0), 0); 329c689b4f1SLaszlo Ersek if (fd == -1 && errno == EEXIST) { 330c689b4f1SLaszlo Ersek oflag &= ~(unsigned)O_CREAT; 331c689b4f1SLaszlo Ersek fd = open(path, oflag); 332c689b4f1SLaszlo Ersek } 333c689b4f1SLaszlo Ersek 334c689b4f1SLaszlo Ersek if (fd == -1) { 335c689b4f1SLaszlo Ersek error_setg_errno(&local_err, errno, "failed to open file '%s' " 336c689b4f1SLaszlo Ersek "(mode: '%s')", path, mode); 337c689b4f1SLaszlo Ersek } else { 338c689b4f1SLaszlo Ersek qemu_set_cloexec(fd); 339c689b4f1SLaszlo Ersek 340c689b4f1SLaszlo Ersek if ((oflag & O_CREAT) && fchmod(fd, DEFAULT_NEW_FILE_MODE) == -1) { 341c689b4f1SLaszlo Ersek error_setg_errno(&local_err, errno, "failed to set permission " 342c689b4f1SLaszlo Ersek "0%03o on new file '%s' (mode: '%s')", 343c689b4f1SLaszlo Ersek (unsigned)DEFAULT_NEW_FILE_MODE, path, mode); 344c689b4f1SLaszlo Ersek } else { 345c689b4f1SLaszlo Ersek FILE *f; 346c689b4f1SLaszlo Ersek 347c689b4f1SLaszlo Ersek f = fdopen(fd, mode); 348c689b4f1SLaszlo Ersek if (f == NULL) { 349c689b4f1SLaszlo Ersek error_setg_errno(&local_err, errno, "failed to associate " 350c689b4f1SLaszlo Ersek "stdio stream with file descriptor %d, " 351c689b4f1SLaszlo Ersek "file '%s' (mode: '%s')", fd, path, mode); 352c689b4f1SLaszlo Ersek } else { 353c689b4f1SLaszlo Ersek return f; 354c689b4f1SLaszlo Ersek } 355c689b4f1SLaszlo Ersek } 356c689b4f1SLaszlo Ersek 357c689b4f1SLaszlo Ersek close(fd); 358c689b4f1SLaszlo Ersek } 359c689b4f1SLaszlo Ersek } 360c689b4f1SLaszlo Ersek 361c689b4f1SLaszlo Ersek error_propagate(err, local_err); 362c689b4f1SLaszlo Ersek return NULL; 363c689b4f1SLaszlo Ersek } 364c689b4f1SLaszlo Ersek 365c216e5adSMichael Roth int64_t qmp_guest_file_open(const char *path, bool has_mode, const char *mode, Error **err) 366c216e5adSMichael Roth { 367c216e5adSMichael Roth FILE *fh; 368c689b4f1SLaszlo Ersek Error *local_err = NULL; 369c216e5adSMichael Roth int fd; 37039097dafSMichael Roth int64_t ret = -1, handle; 371c216e5adSMichael Roth 372c216e5adSMichael Roth if (!has_mode) { 373c216e5adSMichael Roth mode = "r"; 374c216e5adSMichael Roth } 375c216e5adSMichael Roth slog("guest-file-open called, filepath: %s, mode: %s", path, mode); 376c689b4f1SLaszlo Ersek fh = safe_open_or_create(path, mode, &local_err); 377c689b4f1SLaszlo Ersek if (local_err != NULL) { 378c689b4f1SLaszlo Ersek error_propagate(err, local_err); 379c216e5adSMichael Roth return -1; 380c216e5adSMichael Roth } 381c216e5adSMichael Roth 382c216e5adSMichael Roth /* set fd non-blocking to avoid common use cases (like reading from a 383c216e5adSMichael Roth * named pipe) from hanging the agent 384c216e5adSMichael Roth */ 385c216e5adSMichael Roth fd = fileno(fh); 386c216e5adSMichael Roth ret = fcntl(fd, F_GETFL); 387c216e5adSMichael Roth ret = fcntl(fd, F_SETFL, ret | O_NONBLOCK); 388c216e5adSMichael Roth if (ret == -1) { 389db3edb66SLuiz Capitulino error_setg_errno(err, errno, "failed to make file '%s' non-blocking", 390db3edb66SLuiz Capitulino path); 391c216e5adSMichael Roth fclose(fh); 392c216e5adSMichael Roth return -1; 393c216e5adSMichael Roth } 394c216e5adSMichael Roth 39539097dafSMichael Roth handle = guest_file_handle_add(fh, err); 39639097dafSMichael Roth if (error_is_set(err)) { 39739097dafSMichael Roth fclose(fh); 39839097dafSMichael Roth return -1; 39939097dafSMichael Roth } 40039097dafSMichael Roth 40139097dafSMichael Roth slog("guest-file-open, handle: %d", handle); 40239097dafSMichael Roth return handle; 403c216e5adSMichael Roth } 404c216e5adSMichael Roth 405c216e5adSMichael Roth void qmp_guest_file_close(int64_t handle, Error **err) 406c216e5adSMichael Roth { 407a9de6d01SLuiz Capitulino GuestFileHandle *gfh = guest_file_handle_find(handle, err); 408c216e5adSMichael Roth int ret; 409c216e5adSMichael Roth 410c216e5adSMichael Roth slog("guest-file-close called, handle: %ld", handle); 411c216e5adSMichael Roth if (!gfh) { 412c216e5adSMichael Roth return; 413c216e5adSMichael Roth } 414c216e5adSMichael Roth 415c216e5adSMichael Roth ret = fclose(gfh->fh); 4163ac4b7c5SLuiz Capitulino if (ret == EOF) { 417db3edb66SLuiz Capitulino error_setg_errno(err, errno, "failed to close handle"); 418c216e5adSMichael Roth return; 419c216e5adSMichael Roth } 420c216e5adSMichael Roth 421c216e5adSMichael Roth QTAILQ_REMOVE(&guest_file_state.filehandles, gfh, next); 422c216e5adSMichael Roth g_free(gfh); 423c216e5adSMichael Roth } 424c216e5adSMichael Roth 425c216e5adSMichael Roth struct GuestFileRead *qmp_guest_file_read(int64_t handle, bool has_count, 426c216e5adSMichael Roth int64_t count, Error **err) 427c216e5adSMichael Roth { 428a9de6d01SLuiz Capitulino GuestFileHandle *gfh = guest_file_handle_find(handle, err); 429c216e5adSMichael Roth GuestFileRead *read_data = NULL; 430c216e5adSMichael Roth guchar *buf; 431c216e5adSMichael Roth FILE *fh; 432c216e5adSMichael Roth size_t read_count; 433c216e5adSMichael Roth 434c216e5adSMichael Roth if (!gfh) { 435c216e5adSMichael Roth return NULL; 436c216e5adSMichael Roth } 437c216e5adSMichael Roth 438c216e5adSMichael Roth if (!has_count) { 439c216e5adSMichael Roth count = QGA_READ_COUNT_DEFAULT; 440c216e5adSMichael Roth } else if (count < 0) { 441db3edb66SLuiz Capitulino error_setg(err, "value '%" PRId64 "' is invalid for argument count", 442db3edb66SLuiz Capitulino count); 443c216e5adSMichael Roth return NULL; 444c216e5adSMichael Roth } 445c216e5adSMichael Roth 446c216e5adSMichael Roth fh = gfh->fh; 447c216e5adSMichael Roth buf = g_malloc0(count+1); 448c216e5adSMichael Roth read_count = fread(buf, 1, count, fh); 449c216e5adSMichael Roth if (ferror(fh)) { 450db3edb66SLuiz Capitulino error_setg_errno(err, errno, "failed to read file"); 451c216e5adSMichael Roth slog("guest-file-read failed, handle: %ld", handle); 452c216e5adSMichael Roth } else { 453c216e5adSMichael Roth buf[read_count] = 0; 454c216e5adSMichael Roth read_data = g_malloc0(sizeof(GuestFileRead)); 455c216e5adSMichael Roth read_data->count = read_count; 456c216e5adSMichael Roth read_data->eof = feof(fh); 457c216e5adSMichael Roth if (read_count) { 458c216e5adSMichael Roth read_data->buf_b64 = g_base64_encode(buf, read_count); 459c216e5adSMichael Roth } 460c216e5adSMichael Roth } 461c216e5adSMichael Roth g_free(buf); 462c216e5adSMichael Roth clearerr(fh); 463c216e5adSMichael Roth 464c216e5adSMichael Roth return read_data; 465c216e5adSMichael Roth } 466c216e5adSMichael Roth 467c216e5adSMichael Roth GuestFileWrite *qmp_guest_file_write(int64_t handle, const char *buf_b64, 468c216e5adSMichael Roth bool has_count, int64_t count, Error **err) 469c216e5adSMichael Roth { 470c216e5adSMichael Roth GuestFileWrite *write_data = NULL; 471c216e5adSMichael Roth guchar *buf; 472c216e5adSMichael Roth gsize buf_len; 473c216e5adSMichael Roth int write_count; 474a9de6d01SLuiz Capitulino GuestFileHandle *gfh = guest_file_handle_find(handle, err); 475c216e5adSMichael Roth FILE *fh; 476c216e5adSMichael Roth 477c216e5adSMichael Roth if (!gfh) { 478c216e5adSMichael Roth return NULL; 479c216e5adSMichael Roth } 480c216e5adSMichael Roth 481c216e5adSMichael Roth fh = gfh->fh; 482c216e5adSMichael Roth buf = g_base64_decode(buf_b64, &buf_len); 483c216e5adSMichael Roth 484c216e5adSMichael Roth if (!has_count) { 485c216e5adSMichael Roth count = buf_len; 486c216e5adSMichael Roth } else if (count < 0 || count > buf_len) { 487db3edb66SLuiz Capitulino error_setg(err, "value '%" PRId64 "' is invalid for argument count", 488db3edb66SLuiz Capitulino count); 489c216e5adSMichael Roth g_free(buf); 490c216e5adSMichael Roth return NULL; 491c216e5adSMichael Roth } 492c216e5adSMichael Roth 493c216e5adSMichael Roth write_count = fwrite(buf, 1, count, fh); 494c216e5adSMichael Roth if (ferror(fh)) { 495db3edb66SLuiz Capitulino error_setg_errno(err, errno, "failed to write to file"); 496c216e5adSMichael Roth slog("guest-file-write failed, handle: %ld", handle); 497c216e5adSMichael Roth } else { 498c216e5adSMichael Roth write_data = g_malloc0(sizeof(GuestFileWrite)); 499c216e5adSMichael Roth write_data->count = write_count; 500c216e5adSMichael Roth write_data->eof = feof(fh); 501c216e5adSMichael Roth } 502c216e5adSMichael Roth g_free(buf); 503c216e5adSMichael Roth clearerr(fh); 504c216e5adSMichael Roth 505c216e5adSMichael Roth return write_data; 506c216e5adSMichael Roth } 507c216e5adSMichael Roth 508c216e5adSMichael Roth struct GuestFileSeek *qmp_guest_file_seek(int64_t handle, int64_t offset, 509c216e5adSMichael Roth int64_t whence, Error **err) 510c216e5adSMichael Roth { 511a9de6d01SLuiz Capitulino GuestFileHandle *gfh = guest_file_handle_find(handle, err); 512c216e5adSMichael Roth GuestFileSeek *seek_data = NULL; 513c216e5adSMichael Roth FILE *fh; 514c216e5adSMichael Roth int ret; 515c216e5adSMichael Roth 516c216e5adSMichael Roth if (!gfh) { 517c216e5adSMichael Roth return NULL; 518c216e5adSMichael Roth } 519c216e5adSMichael Roth 520c216e5adSMichael Roth fh = gfh->fh; 521c216e5adSMichael Roth ret = fseek(fh, offset, whence); 522c216e5adSMichael Roth if (ret == -1) { 523db3edb66SLuiz Capitulino error_setg_errno(err, errno, "failed to seek file"); 524c216e5adSMichael Roth } else { 525c216e5adSMichael Roth seek_data = g_malloc0(sizeof(GuestFileRead)); 526c216e5adSMichael Roth seek_data->position = ftell(fh); 527c216e5adSMichael Roth seek_data->eof = feof(fh); 528c216e5adSMichael Roth } 529c216e5adSMichael Roth clearerr(fh); 530c216e5adSMichael Roth 531c216e5adSMichael Roth return seek_data; 532c216e5adSMichael Roth } 533c216e5adSMichael Roth 534c216e5adSMichael Roth void qmp_guest_file_flush(int64_t handle, Error **err) 535c216e5adSMichael Roth { 536a9de6d01SLuiz Capitulino GuestFileHandle *gfh = guest_file_handle_find(handle, err); 537c216e5adSMichael Roth FILE *fh; 538c216e5adSMichael Roth int ret; 539c216e5adSMichael Roth 540c216e5adSMichael Roth if (!gfh) { 541c216e5adSMichael Roth return; 542c216e5adSMichael Roth } 543c216e5adSMichael Roth 544c216e5adSMichael Roth fh = gfh->fh; 545c216e5adSMichael Roth ret = fflush(fh); 546c216e5adSMichael Roth if (ret == EOF) { 547db3edb66SLuiz Capitulino error_setg_errno(err, errno, "failed to flush file"); 548c216e5adSMichael Roth } 549c216e5adSMichael Roth } 550c216e5adSMichael Roth 551c216e5adSMichael Roth static void guest_file_init(void) 552c216e5adSMichael Roth { 553c216e5adSMichael Roth QTAILQ_INIT(&guest_file_state.filehandles); 554c216e5adSMichael Roth } 555c216e5adSMichael Roth 556e72c3f2eSMichael Roth /* linux-specific implementations. avoid this if at all possible. */ 557e72c3f2eSMichael Roth #if defined(__linux__) 558e72c3f2eSMichael Roth 559eab5fd59SPaolo Bonzini #if defined(CONFIG_FSFREEZE) || defined(CONFIG_FSTRIM) 560af02203fSPaolo Bonzini typedef struct FsMount { 561c216e5adSMichael Roth char *dirname; 562c216e5adSMichael Roth char *devtype; 563af02203fSPaolo Bonzini QTAILQ_ENTRY(FsMount) next; 564af02203fSPaolo Bonzini } FsMount; 565c216e5adSMichael Roth 566af02203fSPaolo Bonzini typedef QTAILQ_HEAD(, FsMount) FsMountList; 5679e8aded4SMichael Roth 568af02203fSPaolo Bonzini static void free_fs_mount_list(FsMountList *mounts) 569c216e5adSMichael Roth { 570af02203fSPaolo Bonzini FsMount *mount, *temp; 571c216e5adSMichael Roth 5729e8aded4SMichael Roth if (!mounts) { 5739e8aded4SMichael Roth return; 5749e8aded4SMichael Roth } 5759e8aded4SMichael Roth 5769e8aded4SMichael Roth QTAILQ_FOREACH_SAFE(mount, mounts, next, temp) { 5779e8aded4SMichael Roth QTAILQ_REMOVE(mounts, mount, next); 578c216e5adSMichael Roth g_free(mount->dirname); 579c216e5adSMichael Roth g_free(mount->devtype); 580c216e5adSMichael Roth g_free(mount); 581c216e5adSMichael Roth } 5829e8aded4SMichael Roth } 5839e8aded4SMichael Roth 5849e8aded4SMichael Roth /* 5859e8aded4SMichael Roth * Walk the mount table and build a list of local file systems 5869e8aded4SMichael Roth */ 587261551d1SLuiz Capitulino static void build_fs_mount_list(FsMountList *mounts, Error **err) 5889e8aded4SMichael Roth { 5899e8aded4SMichael Roth struct mntent *ment; 590af02203fSPaolo Bonzini FsMount *mount; 5919e2fa418SMichael Roth char const *mtab = "/proc/self/mounts"; 5929e8aded4SMichael Roth FILE *fp; 593c216e5adSMichael Roth 594c216e5adSMichael Roth fp = setmntent(mtab, "r"); 595c216e5adSMichael Roth if (!fp) { 596261551d1SLuiz Capitulino error_setg(err, "failed to open mtab file: '%s'", mtab); 597261551d1SLuiz Capitulino return; 598c216e5adSMichael Roth } 599c216e5adSMichael Roth 600c216e5adSMichael Roth while ((ment = getmntent(fp))) { 601c216e5adSMichael Roth /* 602c216e5adSMichael Roth * An entry which device name doesn't start with a '/' is 603c216e5adSMichael Roth * either a dummy file system or a network file system. 604c216e5adSMichael Roth * Add special handling for smbfs and cifs as is done by 605c216e5adSMichael Roth * coreutils as well. 606c216e5adSMichael Roth */ 607c216e5adSMichael Roth if ((ment->mnt_fsname[0] != '/') || 608c216e5adSMichael Roth (strcmp(ment->mnt_type, "smbfs") == 0) || 609c216e5adSMichael Roth (strcmp(ment->mnt_type, "cifs") == 0)) { 610c216e5adSMichael Roth continue; 611c216e5adSMichael Roth } 612c216e5adSMichael Roth 613af02203fSPaolo Bonzini mount = g_malloc0(sizeof(FsMount)); 614c216e5adSMichael Roth mount->dirname = g_strdup(ment->mnt_dir); 615c216e5adSMichael Roth mount->devtype = g_strdup(ment->mnt_type); 616c216e5adSMichael Roth 6179e8aded4SMichael Roth QTAILQ_INSERT_TAIL(mounts, mount, next); 618c216e5adSMichael Roth } 619c216e5adSMichael Roth 620c216e5adSMichael Roth endmntent(fp); 621c216e5adSMichael Roth } 622eab5fd59SPaolo Bonzini #endif 623eab5fd59SPaolo Bonzini 624eab5fd59SPaolo Bonzini #if defined(CONFIG_FSFREEZE) 625c216e5adSMichael Roth 626ec0f694cSTomoki Sekiyama typedef enum { 627ec0f694cSTomoki Sekiyama FSFREEZE_HOOK_THAW = 0, 628ec0f694cSTomoki Sekiyama FSFREEZE_HOOK_FREEZE, 629ec0f694cSTomoki Sekiyama } FsfreezeHookArg; 630ec0f694cSTomoki Sekiyama 631ec0f694cSTomoki Sekiyama const char *fsfreeze_hook_arg_string[] = { 632ec0f694cSTomoki Sekiyama "thaw", 633ec0f694cSTomoki Sekiyama "freeze", 634ec0f694cSTomoki Sekiyama }; 635ec0f694cSTomoki Sekiyama 636ec0f694cSTomoki Sekiyama static void execute_fsfreeze_hook(FsfreezeHookArg arg, Error **err) 637ec0f694cSTomoki Sekiyama { 638ec0f694cSTomoki Sekiyama int status; 639ec0f694cSTomoki Sekiyama pid_t pid; 640ec0f694cSTomoki Sekiyama const char *hook; 641ec0f694cSTomoki Sekiyama const char *arg_str = fsfreeze_hook_arg_string[arg]; 642ec0f694cSTomoki Sekiyama Error *local_err = NULL; 643ec0f694cSTomoki Sekiyama 644ec0f694cSTomoki Sekiyama hook = ga_fsfreeze_hook(ga_state); 645ec0f694cSTomoki Sekiyama if (!hook) { 646ec0f694cSTomoki Sekiyama return; 647ec0f694cSTomoki Sekiyama } 648ec0f694cSTomoki Sekiyama if (access(hook, X_OK) != 0) { 649ec0f694cSTomoki Sekiyama error_setg_errno(err, errno, "can't access fsfreeze hook '%s'", hook); 650ec0f694cSTomoki Sekiyama return; 651ec0f694cSTomoki Sekiyama } 652ec0f694cSTomoki Sekiyama 653ec0f694cSTomoki Sekiyama slog("executing fsfreeze hook with arg '%s'", arg_str); 654ec0f694cSTomoki Sekiyama pid = fork(); 655ec0f694cSTomoki Sekiyama if (pid == 0) { 656ec0f694cSTomoki Sekiyama setsid(); 657ec0f694cSTomoki Sekiyama reopen_fd_to_null(0); 658ec0f694cSTomoki Sekiyama reopen_fd_to_null(1); 659ec0f694cSTomoki Sekiyama reopen_fd_to_null(2); 660ec0f694cSTomoki Sekiyama 661ec0f694cSTomoki Sekiyama execle(hook, hook, arg_str, NULL, environ); 662ec0f694cSTomoki Sekiyama _exit(EXIT_FAILURE); 663ec0f694cSTomoki Sekiyama } else if (pid < 0) { 664ec0f694cSTomoki Sekiyama error_setg_errno(err, errno, "failed to create child process"); 665ec0f694cSTomoki Sekiyama return; 666ec0f694cSTomoki Sekiyama } 667ec0f694cSTomoki Sekiyama 668ec0f694cSTomoki Sekiyama ga_wait_child(pid, &status, &local_err); 669ec0f694cSTomoki Sekiyama if (error_is_set(&local_err)) { 670ec0f694cSTomoki Sekiyama error_propagate(err, local_err); 671ec0f694cSTomoki Sekiyama return; 672ec0f694cSTomoki Sekiyama } 673ec0f694cSTomoki Sekiyama 674ec0f694cSTomoki Sekiyama if (!WIFEXITED(status)) { 675ec0f694cSTomoki Sekiyama error_setg(err, "fsfreeze hook has terminated abnormally"); 676ec0f694cSTomoki Sekiyama return; 677ec0f694cSTomoki Sekiyama } 678ec0f694cSTomoki Sekiyama 679ec0f694cSTomoki Sekiyama status = WEXITSTATUS(status); 680ec0f694cSTomoki Sekiyama if (status) { 681ec0f694cSTomoki Sekiyama error_setg(err, "fsfreeze hook has failed with status %d", status); 682ec0f694cSTomoki Sekiyama return; 683ec0f694cSTomoki Sekiyama } 684ec0f694cSTomoki Sekiyama } 685ec0f694cSTomoki Sekiyama 686c216e5adSMichael Roth /* 687c216e5adSMichael Roth * Return status of freeze/thaw 688c216e5adSMichael Roth */ 689c216e5adSMichael Roth GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **err) 690c216e5adSMichael Roth { 691f22d85e9SMichael Roth if (ga_is_frozen(ga_state)) { 692f22d85e9SMichael Roth return GUEST_FSFREEZE_STATUS_FROZEN; 693f22d85e9SMichael Roth } 694f22d85e9SMichael Roth 695f22d85e9SMichael Roth return GUEST_FSFREEZE_STATUS_THAWED; 696c216e5adSMichael Roth } 697c216e5adSMichael Roth 698c216e5adSMichael Roth /* 699c216e5adSMichael Roth * Walk list of mounted file systems in the guest, and freeze the ones which 700c216e5adSMichael Roth * are real local file systems. 701c216e5adSMichael Roth */ 702c216e5adSMichael Roth int64_t qmp_guest_fsfreeze_freeze(Error **err) 703c216e5adSMichael Roth { 704c216e5adSMichael Roth int ret = 0, i = 0; 705af02203fSPaolo Bonzini FsMountList mounts; 706af02203fSPaolo Bonzini struct FsMount *mount; 707261551d1SLuiz Capitulino Error *local_err = NULL; 708c216e5adSMichael Roth int fd; 709c216e5adSMichael Roth 710c216e5adSMichael Roth slog("guest-fsfreeze called"); 711c216e5adSMichael Roth 712ec0f694cSTomoki Sekiyama execute_fsfreeze_hook(FSFREEZE_HOOK_FREEZE, &local_err); 713ec0f694cSTomoki Sekiyama if (error_is_set(&local_err)) { 714ec0f694cSTomoki Sekiyama error_propagate(err, local_err); 715ec0f694cSTomoki Sekiyama return -1; 716ec0f694cSTomoki Sekiyama } 717ec0f694cSTomoki Sekiyama 7189e8aded4SMichael Roth QTAILQ_INIT(&mounts); 719261551d1SLuiz Capitulino build_fs_mount_list(&mounts, &local_err); 720261551d1SLuiz Capitulino if (error_is_set(&local_err)) { 721261551d1SLuiz Capitulino error_propagate(err, local_err); 722261551d1SLuiz Capitulino return -1; 723c216e5adSMichael Roth } 724c216e5adSMichael Roth 725c216e5adSMichael Roth /* cannot risk guest agent blocking itself on a write in this state */ 726f22d85e9SMichael Roth ga_set_frozen(ga_state); 727c216e5adSMichael Roth 7289e8aded4SMichael Roth QTAILQ_FOREACH(mount, &mounts, next) { 729c216e5adSMichael Roth fd = qemu_open(mount->dirname, O_RDONLY); 730c216e5adSMichael Roth if (fd == -1) { 731617fbbc1SLuiz Capitulino error_setg_errno(err, errno, "failed to open %s", mount->dirname); 732c216e5adSMichael Roth goto error; 733c216e5adSMichael Roth } 734c216e5adSMichael Roth 735c216e5adSMichael Roth /* we try to cull filesytems we know won't work in advance, but other 736c216e5adSMichael Roth * filesytems may not implement fsfreeze for less obvious reasons. 7379e8aded4SMichael Roth * these will report EOPNOTSUPP. we simply ignore these when tallying 7389e8aded4SMichael Roth * the number of frozen filesystems. 7399e8aded4SMichael Roth * 7409e8aded4SMichael Roth * any other error means a failure to freeze a filesystem we 7419e8aded4SMichael Roth * expect to be freezable, so return an error in those cases 7429e8aded4SMichael Roth * and return system to thawed state. 743c216e5adSMichael Roth */ 744c216e5adSMichael Roth ret = ioctl(fd, FIFREEZE); 7459e8aded4SMichael Roth if (ret == -1) { 7469e8aded4SMichael Roth if (errno != EOPNOTSUPP) { 747617fbbc1SLuiz Capitulino error_setg_errno(err, errno, "failed to freeze %s", 748617fbbc1SLuiz Capitulino mount->dirname); 749c216e5adSMichael Roth close(fd); 750c216e5adSMichael Roth goto error; 751c216e5adSMichael Roth } 7529e8aded4SMichael Roth } else { 753c216e5adSMichael Roth i++; 754c216e5adSMichael Roth } 7559e8aded4SMichael Roth close(fd); 7569e8aded4SMichael Roth } 757c216e5adSMichael Roth 758af02203fSPaolo Bonzini free_fs_mount_list(&mounts); 759c216e5adSMichael Roth return i; 760c216e5adSMichael Roth 761c216e5adSMichael Roth error: 762af02203fSPaolo Bonzini free_fs_mount_list(&mounts); 763c216e5adSMichael Roth qmp_guest_fsfreeze_thaw(NULL); 764c216e5adSMichael Roth return 0; 765c216e5adSMichael Roth } 766c216e5adSMichael Roth 767c216e5adSMichael Roth /* 768c216e5adSMichael Roth * Walk list of frozen file systems in the guest, and thaw them. 769c216e5adSMichael Roth */ 770c216e5adSMichael Roth int64_t qmp_guest_fsfreeze_thaw(Error **err) 771c216e5adSMichael Roth { 772c216e5adSMichael Roth int ret; 773af02203fSPaolo Bonzini FsMountList mounts; 774af02203fSPaolo Bonzini FsMount *mount; 7759e8aded4SMichael Roth int fd, i = 0, logged; 776261551d1SLuiz Capitulino Error *local_err = NULL; 777c216e5adSMichael Roth 7789e8aded4SMichael Roth QTAILQ_INIT(&mounts); 779261551d1SLuiz Capitulino build_fs_mount_list(&mounts, &local_err); 780261551d1SLuiz Capitulino if (error_is_set(&local_err)) { 781261551d1SLuiz Capitulino error_propagate(err, local_err); 7829e8aded4SMichael Roth return 0; 7839e8aded4SMichael Roth } 7849e8aded4SMichael Roth 7859e8aded4SMichael Roth QTAILQ_FOREACH(mount, &mounts, next) { 7869e8aded4SMichael Roth logged = false; 787c216e5adSMichael Roth fd = qemu_open(mount->dirname, O_RDONLY); 788c216e5adSMichael Roth if (fd == -1) { 789c216e5adSMichael Roth continue; 790c216e5adSMichael Roth } 7919e8aded4SMichael Roth /* we have no way of knowing whether a filesystem was actually unfrozen 7929e8aded4SMichael Roth * as a result of a successful call to FITHAW, only that if an error 7939e8aded4SMichael Roth * was returned the filesystem was *not* unfrozen by that particular 7949e8aded4SMichael Roth * call. 7959e8aded4SMichael Roth * 796a31f0531SJim Meyering * since multiple preceding FIFREEZEs require multiple calls to FITHAW 7979e8aded4SMichael Roth * to unfreeze, continuing issuing FITHAW until an error is returned, 7989e8aded4SMichael Roth * in which case either the filesystem is in an unfreezable state, or, 7999e8aded4SMichael Roth * more likely, it was thawed previously (and remains so afterward). 8009e8aded4SMichael Roth * 8019e8aded4SMichael Roth * also, since the most recent successful call is the one that did 8029e8aded4SMichael Roth * the actual unfreeze, we can use this to provide an accurate count 8039e8aded4SMichael Roth * of the number of filesystems unfrozen by guest-fsfreeze-thaw, which 8049e8aded4SMichael Roth * may * be useful for determining whether a filesystem was unfrozen 8059e8aded4SMichael Roth * during the freeze/thaw phase by a process other than qemu-ga. 8069e8aded4SMichael Roth */ 8079e8aded4SMichael Roth do { 808c216e5adSMichael Roth ret = ioctl(fd, FITHAW); 8099e8aded4SMichael Roth if (ret == 0 && !logged) { 810c216e5adSMichael Roth i++; 8119e8aded4SMichael Roth logged = true; 8129e8aded4SMichael Roth } 8139e8aded4SMichael Roth } while (ret == 0); 8149e8aded4SMichael Roth close(fd); 815c216e5adSMichael Roth } 816c216e5adSMichael Roth 817f22d85e9SMichael Roth ga_unset_frozen(ga_state); 818af02203fSPaolo Bonzini free_fs_mount_list(&mounts); 819ec0f694cSTomoki Sekiyama 820ec0f694cSTomoki Sekiyama execute_fsfreeze_hook(FSFREEZE_HOOK_THAW, err); 821ec0f694cSTomoki Sekiyama 822c216e5adSMichael Roth return i; 823c216e5adSMichael Roth } 824c216e5adSMichael Roth 825c216e5adSMichael Roth static void guest_fsfreeze_cleanup(void) 826c216e5adSMichael Roth { 827c216e5adSMichael Roth Error *err = NULL; 828c216e5adSMichael Roth 829f22d85e9SMichael Roth if (ga_is_frozen(ga_state) == GUEST_FSFREEZE_STATUS_FROZEN) { 8306f686749SMarkus Armbruster qmp_guest_fsfreeze_thaw(&err); 8316f686749SMarkus Armbruster if (err) { 8326f686749SMarkus Armbruster slog("failed to clean up frozen filesystems: %s", 8336f686749SMarkus Armbruster error_get_pretty(err)); 8346f686749SMarkus Armbruster error_free(err); 835c216e5adSMichael Roth } 836c216e5adSMichael Roth } 837c216e5adSMichael Roth } 838e72c3f2eSMichael Roth #endif /* CONFIG_FSFREEZE */ 839c216e5adSMichael Roth 840eab5fd59SPaolo Bonzini #if defined(CONFIG_FSTRIM) 841eab5fd59SPaolo Bonzini /* 842eab5fd59SPaolo Bonzini * Walk list of mounted file systems in the guest, and trim them. 843eab5fd59SPaolo Bonzini */ 844eab5fd59SPaolo Bonzini void qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **err) 845eab5fd59SPaolo Bonzini { 846eab5fd59SPaolo Bonzini int ret = 0; 847eab5fd59SPaolo Bonzini FsMountList mounts; 848eab5fd59SPaolo Bonzini struct FsMount *mount; 849eab5fd59SPaolo Bonzini int fd; 850261551d1SLuiz Capitulino Error *local_err = NULL; 851eab5fd59SPaolo Bonzini struct fstrim_range r = { 852eab5fd59SPaolo Bonzini .start = 0, 853eab5fd59SPaolo Bonzini .len = -1, 854eab5fd59SPaolo Bonzini .minlen = has_minimum ? minimum : 0, 855eab5fd59SPaolo Bonzini }; 856eab5fd59SPaolo Bonzini 857eab5fd59SPaolo Bonzini slog("guest-fstrim called"); 858eab5fd59SPaolo Bonzini 859eab5fd59SPaolo Bonzini QTAILQ_INIT(&mounts); 860261551d1SLuiz Capitulino build_fs_mount_list(&mounts, &local_err); 861261551d1SLuiz Capitulino if (error_is_set(&local_err)) { 862261551d1SLuiz Capitulino error_propagate(err, local_err); 863eab5fd59SPaolo Bonzini return; 864eab5fd59SPaolo Bonzini } 865eab5fd59SPaolo Bonzini 866eab5fd59SPaolo Bonzini QTAILQ_FOREACH(mount, &mounts, next) { 867eab5fd59SPaolo Bonzini fd = qemu_open(mount->dirname, O_RDONLY); 868eab5fd59SPaolo Bonzini if (fd == -1) { 869071673b0SLuiz Capitulino error_setg_errno(err, errno, "failed to open %s", mount->dirname); 870eab5fd59SPaolo Bonzini goto error; 871eab5fd59SPaolo Bonzini } 872eab5fd59SPaolo Bonzini 873eab5fd59SPaolo Bonzini /* We try to cull filesytems we know won't work in advance, but other 874eab5fd59SPaolo Bonzini * filesytems may not implement fstrim for less obvious reasons. These 875eab5fd59SPaolo Bonzini * will report EOPNOTSUPP; we simply ignore these errors. Any other 876eab5fd59SPaolo Bonzini * error means an unexpected error, so return it in those cases. In 877eab5fd59SPaolo Bonzini * some other cases ENOTTY will be reported (e.g. CD-ROMs). 878eab5fd59SPaolo Bonzini */ 879eab5fd59SPaolo Bonzini ret = ioctl(fd, FITRIM, &r); 880eab5fd59SPaolo Bonzini if (ret == -1) { 881eab5fd59SPaolo Bonzini if (errno != ENOTTY && errno != EOPNOTSUPP) { 882071673b0SLuiz Capitulino error_setg_errno(err, errno, "failed to trim %s", 883071673b0SLuiz Capitulino mount->dirname); 884eab5fd59SPaolo Bonzini close(fd); 885eab5fd59SPaolo Bonzini goto error; 886eab5fd59SPaolo Bonzini } 887eab5fd59SPaolo Bonzini } 888eab5fd59SPaolo Bonzini close(fd); 889eab5fd59SPaolo Bonzini } 890eab5fd59SPaolo Bonzini 891eab5fd59SPaolo Bonzini error: 892eab5fd59SPaolo Bonzini free_fs_mount_list(&mounts); 893eab5fd59SPaolo Bonzini } 894eab5fd59SPaolo Bonzini #endif /* CONFIG_FSTRIM */ 895eab5fd59SPaolo Bonzini 896eab5fd59SPaolo Bonzini 89711d0f125SLuiz Capitulino #define LINUX_SYS_STATE_FILE "/sys/power/state" 89811d0f125SLuiz Capitulino #define SUSPEND_SUPPORTED 0 89911d0f125SLuiz Capitulino #define SUSPEND_NOT_SUPPORTED 1 90011d0f125SLuiz Capitulino 90111d0f125SLuiz Capitulino static void bios_supports_mode(const char *pmutils_bin, const char *pmutils_arg, 90211d0f125SLuiz Capitulino const char *sysfile_str, Error **err) 90311d0f125SLuiz Capitulino { 9046b26e837SLuiz Capitulino Error *local_err = NULL; 90511d0f125SLuiz Capitulino char *pmutils_path; 9066b26e837SLuiz Capitulino pid_t pid; 907dc8764f0SLuiz Capitulino int status; 90811d0f125SLuiz Capitulino 90911d0f125SLuiz Capitulino pmutils_path = g_find_program_in_path(pmutils_bin); 91011d0f125SLuiz Capitulino 91111d0f125SLuiz Capitulino pid = fork(); 91211d0f125SLuiz Capitulino if (!pid) { 913dc8764f0SLuiz Capitulino char buf[32]; /* hopefully big enough */ 914dc8764f0SLuiz Capitulino ssize_t ret; 915dc8764f0SLuiz Capitulino int fd; 91611d0f125SLuiz Capitulino 91711d0f125SLuiz Capitulino setsid(); 91811d0f125SLuiz Capitulino reopen_fd_to_null(0); 91911d0f125SLuiz Capitulino reopen_fd_to_null(1); 92011d0f125SLuiz Capitulino reopen_fd_to_null(2); 92111d0f125SLuiz Capitulino 92211d0f125SLuiz Capitulino if (pmutils_path) { 92311d0f125SLuiz Capitulino execle(pmutils_path, pmutils_bin, pmutils_arg, NULL, environ); 92411d0f125SLuiz Capitulino } 92511d0f125SLuiz Capitulino 92611d0f125SLuiz Capitulino /* 92711d0f125SLuiz Capitulino * If we get here either pm-utils is not installed or execle() has 92811d0f125SLuiz Capitulino * failed. Let's try the manual method if the caller wants it. 92911d0f125SLuiz Capitulino */ 93011d0f125SLuiz Capitulino 93111d0f125SLuiz Capitulino if (!sysfile_str) { 93211d0f125SLuiz Capitulino _exit(SUSPEND_NOT_SUPPORTED); 93311d0f125SLuiz Capitulino } 93411d0f125SLuiz Capitulino 93511d0f125SLuiz Capitulino fd = open(LINUX_SYS_STATE_FILE, O_RDONLY); 93611d0f125SLuiz Capitulino if (fd < 0) { 93711d0f125SLuiz Capitulino _exit(SUSPEND_NOT_SUPPORTED); 93811d0f125SLuiz Capitulino } 93911d0f125SLuiz Capitulino 94011d0f125SLuiz Capitulino ret = read(fd, buf, sizeof(buf)-1); 94111d0f125SLuiz Capitulino if (ret <= 0) { 94211d0f125SLuiz Capitulino _exit(SUSPEND_NOT_SUPPORTED); 94311d0f125SLuiz Capitulino } 94411d0f125SLuiz Capitulino buf[ret] = '\0'; 94511d0f125SLuiz Capitulino 94611d0f125SLuiz Capitulino if (strstr(buf, sysfile_str)) { 94711d0f125SLuiz Capitulino _exit(SUSPEND_SUPPORTED); 94811d0f125SLuiz Capitulino } 94911d0f125SLuiz Capitulino 95011d0f125SLuiz Capitulino _exit(SUSPEND_NOT_SUPPORTED); 9516b26e837SLuiz Capitulino } else if (pid < 0) { 9526b26e837SLuiz Capitulino error_setg_errno(err, errno, "failed to create child process"); 9536b26e837SLuiz Capitulino goto out; 95411d0f125SLuiz Capitulino } 95511d0f125SLuiz Capitulino 9566b26e837SLuiz Capitulino ga_wait_child(pid, &status, &local_err); 9576b26e837SLuiz Capitulino if (error_is_set(&local_err)) { 9586b26e837SLuiz Capitulino error_propagate(err, local_err); 9596b26e837SLuiz Capitulino goto out; 96011d0f125SLuiz Capitulino } 96111d0f125SLuiz Capitulino 9626b26e837SLuiz Capitulino if (!WIFEXITED(status)) { 9636b26e837SLuiz Capitulino error_setg(err, "child process has terminated abnormally"); 9646b26e837SLuiz Capitulino goto out; 9656b26e837SLuiz Capitulino } 9666b26e837SLuiz Capitulino 967dc8764f0SLuiz Capitulino switch (WEXITSTATUS(status)) { 968dc8764f0SLuiz Capitulino case SUSPEND_SUPPORTED: 9696b26e837SLuiz Capitulino goto out; 970dc8764f0SLuiz Capitulino case SUSPEND_NOT_SUPPORTED: 9716b26e837SLuiz Capitulino error_setg(err, 9726b26e837SLuiz Capitulino "the requested suspend mode is not supported by the guest"); 9736b26e837SLuiz Capitulino goto out; 974dc8764f0SLuiz Capitulino default: 9756b26e837SLuiz Capitulino error_setg(err, 9766b26e837SLuiz Capitulino "the helper program '%s' returned an unexpected exit status" 9776b26e837SLuiz Capitulino " code (%d)", pmutils_path, WEXITSTATUS(status)); 9786b26e837SLuiz Capitulino goto out; 979dc8764f0SLuiz Capitulino } 98011d0f125SLuiz Capitulino 9816b26e837SLuiz Capitulino out: 9826b26e837SLuiz Capitulino g_free(pmutils_path); 98311d0f125SLuiz Capitulino } 98411d0f125SLuiz Capitulino 98511d0f125SLuiz Capitulino static void guest_suspend(const char *pmutils_bin, const char *sysfile_str, 98611d0f125SLuiz Capitulino Error **err) 98711d0f125SLuiz Capitulino { 9887b376087SLuiz Capitulino Error *local_err = NULL; 98911d0f125SLuiz Capitulino char *pmutils_path; 9907b376087SLuiz Capitulino pid_t pid; 991dc8764f0SLuiz Capitulino int status; 99211d0f125SLuiz Capitulino 99311d0f125SLuiz Capitulino pmutils_path = g_find_program_in_path(pmutils_bin); 99411d0f125SLuiz Capitulino 99511d0f125SLuiz Capitulino pid = fork(); 99611d0f125SLuiz Capitulino if (pid == 0) { 99711d0f125SLuiz Capitulino /* child */ 99811d0f125SLuiz Capitulino int fd; 99911d0f125SLuiz Capitulino 100011d0f125SLuiz Capitulino setsid(); 100111d0f125SLuiz Capitulino reopen_fd_to_null(0); 100211d0f125SLuiz Capitulino reopen_fd_to_null(1); 100311d0f125SLuiz Capitulino reopen_fd_to_null(2); 100411d0f125SLuiz Capitulino 100511d0f125SLuiz Capitulino if (pmutils_path) { 100611d0f125SLuiz Capitulino execle(pmutils_path, pmutils_bin, NULL, environ); 100711d0f125SLuiz Capitulino } 100811d0f125SLuiz Capitulino 100911d0f125SLuiz Capitulino /* 101011d0f125SLuiz Capitulino * If we get here either pm-utils is not installed or execle() has 101111d0f125SLuiz Capitulino * failed. Let's try the manual method if the caller wants it. 101211d0f125SLuiz Capitulino */ 101311d0f125SLuiz Capitulino 101411d0f125SLuiz Capitulino if (!sysfile_str) { 101511d0f125SLuiz Capitulino _exit(EXIT_FAILURE); 101611d0f125SLuiz Capitulino } 101711d0f125SLuiz Capitulino 101811d0f125SLuiz Capitulino fd = open(LINUX_SYS_STATE_FILE, O_WRONLY); 101911d0f125SLuiz Capitulino if (fd < 0) { 102011d0f125SLuiz Capitulino _exit(EXIT_FAILURE); 102111d0f125SLuiz Capitulino } 102211d0f125SLuiz Capitulino 102311d0f125SLuiz Capitulino if (write(fd, sysfile_str, strlen(sysfile_str)) < 0) { 102411d0f125SLuiz Capitulino _exit(EXIT_FAILURE); 102511d0f125SLuiz Capitulino } 102611d0f125SLuiz Capitulino 102711d0f125SLuiz Capitulino _exit(EXIT_SUCCESS); 10287b376087SLuiz Capitulino } else if (pid < 0) { 10297b376087SLuiz Capitulino error_setg_errno(err, errno, "failed to create child process"); 10307b376087SLuiz Capitulino goto out; 103111d0f125SLuiz Capitulino } 103211d0f125SLuiz Capitulino 10337b376087SLuiz Capitulino ga_wait_child(pid, &status, &local_err); 10347b376087SLuiz Capitulino if (error_is_set(&local_err)) { 10357b376087SLuiz Capitulino error_propagate(err, local_err); 10367b376087SLuiz Capitulino goto out; 10377b376087SLuiz Capitulino } 10387b376087SLuiz Capitulino 10397b376087SLuiz Capitulino if (!WIFEXITED(status)) { 10407b376087SLuiz Capitulino error_setg(err, "child process has terminated abnormally"); 10417b376087SLuiz Capitulino goto out; 10427b376087SLuiz Capitulino } 10437b376087SLuiz Capitulino 10447b376087SLuiz Capitulino if (WEXITSTATUS(status)) { 10457b376087SLuiz Capitulino error_setg(err, "child process has failed to suspend"); 10467b376087SLuiz Capitulino goto out; 10477b376087SLuiz Capitulino } 10487b376087SLuiz Capitulino 10497b376087SLuiz Capitulino out: 105011d0f125SLuiz Capitulino g_free(pmutils_path); 105111d0f125SLuiz Capitulino } 105211d0f125SLuiz Capitulino 105311d0f125SLuiz Capitulino void qmp_guest_suspend_disk(Error **err) 105411d0f125SLuiz Capitulino { 105511d0f125SLuiz Capitulino bios_supports_mode("pm-is-supported", "--hibernate", "disk", err); 105611d0f125SLuiz Capitulino if (error_is_set(err)) { 105711d0f125SLuiz Capitulino return; 105811d0f125SLuiz Capitulino } 105911d0f125SLuiz Capitulino 106011d0f125SLuiz Capitulino guest_suspend("pm-hibernate", "disk", err); 106111d0f125SLuiz Capitulino } 106211d0f125SLuiz Capitulino 1063fbf42210SLuiz Capitulino void qmp_guest_suspend_ram(Error **err) 1064fbf42210SLuiz Capitulino { 1065fbf42210SLuiz Capitulino bios_supports_mode("pm-is-supported", "--suspend", "mem", err); 1066fbf42210SLuiz Capitulino if (error_is_set(err)) { 1067fbf42210SLuiz Capitulino return; 1068fbf42210SLuiz Capitulino } 1069fbf42210SLuiz Capitulino 1070fbf42210SLuiz Capitulino guest_suspend("pm-suspend", "mem", err); 1071fbf42210SLuiz Capitulino } 1072fbf42210SLuiz Capitulino 107395f4f404SLuiz Capitulino void qmp_guest_suspend_hybrid(Error **err) 107495f4f404SLuiz Capitulino { 107595f4f404SLuiz Capitulino bios_supports_mode("pm-is-supported", "--suspend-hybrid", NULL, err); 107695f4f404SLuiz Capitulino if (error_is_set(err)) { 107795f4f404SLuiz Capitulino return; 107895f4f404SLuiz Capitulino } 107995f4f404SLuiz Capitulino 108095f4f404SLuiz Capitulino guest_suspend("pm-suspend-hybrid", NULL, err); 108195f4f404SLuiz Capitulino } 108295f4f404SLuiz Capitulino 10833424fc9fSMichal Privoznik static GuestNetworkInterfaceList * 10843424fc9fSMichal Privoznik guest_find_interface(GuestNetworkInterfaceList *head, 10853424fc9fSMichal Privoznik const char *name) 10863424fc9fSMichal Privoznik { 10873424fc9fSMichal Privoznik for (; head; head = head->next) { 10883424fc9fSMichal Privoznik if (strcmp(head->value->name, name) == 0) { 10893424fc9fSMichal Privoznik break; 10903424fc9fSMichal Privoznik } 10913424fc9fSMichal Privoznik } 10923424fc9fSMichal Privoznik 10933424fc9fSMichal Privoznik return head; 10943424fc9fSMichal Privoznik } 10953424fc9fSMichal Privoznik 10963424fc9fSMichal Privoznik /* 10973424fc9fSMichal Privoznik * Build information about guest interfaces 10983424fc9fSMichal Privoznik */ 10993424fc9fSMichal Privoznik GuestNetworkInterfaceList *qmp_guest_network_get_interfaces(Error **errp) 11003424fc9fSMichal Privoznik { 11013424fc9fSMichal Privoznik GuestNetworkInterfaceList *head = NULL, *cur_item = NULL; 11023424fc9fSMichal Privoznik struct ifaddrs *ifap, *ifa; 11033424fc9fSMichal Privoznik 11043424fc9fSMichal Privoznik if (getifaddrs(&ifap) < 0) { 1105878a0ae0SLuiz Capitulino error_setg_errno(errp, errno, "getifaddrs failed"); 11063424fc9fSMichal Privoznik goto error; 11073424fc9fSMichal Privoznik } 11083424fc9fSMichal Privoznik 11093424fc9fSMichal Privoznik for (ifa = ifap; ifa; ifa = ifa->ifa_next) { 11103424fc9fSMichal Privoznik GuestNetworkInterfaceList *info; 11113424fc9fSMichal Privoznik GuestIpAddressList **address_list = NULL, *address_item = NULL; 11123424fc9fSMichal Privoznik char addr4[INET_ADDRSTRLEN]; 11133424fc9fSMichal Privoznik char addr6[INET6_ADDRSTRLEN]; 11143424fc9fSMichal Privoznik int sock; 11153424fc9fSMichal Privoznik struct ifreq ifr; 11163424fc9fSMichal Privoznik unsigned char *mac_addr; 11173424fc9fSMichal Privoznik void *p; 11183424fc9fSMichal Privoznik 11193424fc9fSMichal Privoznik g_debug("Processing %s interface", ifa->ifa_name); 11203424fc9fSMichal Privoznik 11213424fc9fSMichal Privoznik info = guest_find_interface(head, ifa->ifa_name); 11223424fc9fSMichal Privoznik 11233424fc9fSMichal Privoznik if (!info) { 11243424fc9fSMichal Privoznik info = g_malloc0(sizeof(*info)); 11253424fc9fSMichal Privoznik info->value = g_malloc0(sizeof(*info->value)); 11263424fc9fSMichal Privoznik info->value->name = g_strdup(ifa->ifa_name); 11273424fc9fSMichal Privoznik 11283424fc9fSMichal Privoznik if (!cur_item) { 11293424fc9fSMichal Privoznik head = cur_item = info; 11303424fc9fSMichal Privoznik } else { 11313424fc9fSMichal Privoznik cur_item->next = info; 11323424fc9fSMichal Privoznik cur_item = info; 11333424fc9fSMichal Privoznik } 11343424fc9fSMichal Privoznik } 11353424fc9fSMichal Privoznik 11363424fc9fSMichal Privoznik if (!info->value->has_hardware_address && 11373424fc9fSMichal Privoznik ifa->ifa_flags & SIOCGIFHWADDR) { 11383424fc9fSMichal Privoznik /* we haven't obtained HW address yet */ 11393424fc9fSMichal Privoznik sock = socket(PF_INET, SOCK_STREAM, 0); 11403424fc9fSMichal Privoznik if (sock == -1) { 1141878a0ae0SLuiz Capitulino error_setg_errno(errp, errno, "failed to create socket"); 11423424fc9fSMichal Privoznik goto error; 11433424fc9fSMichal Privoznik } 11443424fc9fSMichal Privoznik 11453424fc9fSMichal Privoznik memset(&ifr, 0, sizeof(ifr)); 11461ab516edSJim Meyering pstrcpy(ifr.ifr_name, IF_NAMESIZE, info->value->name); 11473424fc9fSMichal Privoznik if (ioctl(sock, SIOCGIFHWADDR, &ifr) == -1) { 1148878a0ae0SLuiz Capitulino error_setg_errno(errp, errno, 1149878a0ae0SLuiz Capitulino "failed to get MAC address of %s", 1150878a0ae0SLuiz Capitulino ifa->ifa_name); 115110a2158fSMarkus Armbruster close(sock); 11523424fc9fSMichal Privoznik goto error; 11533424fc9fSMichal Privoznik } 11543424fc9fSMichal Privoznik 115510a2158fSMarkus Armbruster close(sock); 11563424fc9fSMichal Privoznik mac_addr = (unsigned char *) &ifr.ifr_hwaddr.sa_data; 11573424fc9fSMichal Privoznik 1158e4ada482SStefan Weil info->value->hardware_address = 1159e4ada482SStefan Weil g_strdup_printf("%02x:%02x:%02x:%02x:%02x:%02x", 11603424fc9fSMichal Privoznik (int) mac_addr[0], (int) mac_addr[1], 11613424fc9fSMichal Privoznik (int) mac_addr[2], (int) mac_addr[3], 1162e4ada482SStefan Weil (int) mac_addr[4], (int) mac_addr[5]); 11633424fc9fSMichal Privoznik 11643424fc9fSMichal Privoznik info->value->has_hardware_address = true; 11653424fc9fSMichal Privoznik } 11663424fc9fSMichal Privoznik 11673424fc9fSMichal Privoznik if (ifa->ifa_addr && 11683424fc9fSMichal Privoznik ifa->ifa_addr->sa_family == AF_INET) { 11693424fc9fSMichal Privoznik /* interface with IPv4 address */ 11703424fc9fSMichal Privoznik p = &((struct sockaddr_in *)ifa->ifa_addr)->sin_addr; 11713424fc9fSMichal Privoznik if (!inet_ntop(AF_INET, p, addr4, sizeof(addr4))) { 1172878a0ae0SLuiz Capitulino error_setg_errno(errp, errno, "inet_ntop failed"); 11733424fc9fSMichal Privoznik goto error; 11743424fc9fSMichal Privoznik } 11753424fc9fSMichal Privoznik 117610a2158fSMarkus Armbruster address_item = g_malloc0(sizeof(*address_item)); 117710a2158fSMarkus Armbruster address_item->value = g_malloc0(sizeof(*address_item->value)); 11783424fc9fSMichal Privoznik address_item->value->ip_address = g_strdup(addr4); 11793424fc9fSMichal Privoznik address_item->value->ip_address_type = GUEST_IP_ADDRESS_TYPE_IPV4; 11803424fc9fSMichal Privoznik 11813424fc9fSMichal Privoznik if (ifa->ifa_netmask) { 11823424fc9fSMichal Privoznik /* Count the number of set bits in netmask. 11833424fc9fSMichal Privoznik * This is safe as '1' and '0' cannot be shuffled in netmask. */ 11843424fc9fSMichal Privoznik p = &((struct sockaddr_in *)ifa->ifa_netmask)->sin_addr; 11853424fc9fSMichal Privoznik address_item->value->prefix = ctpop32(((uint32_t *) p)[0]); 11863424fc9fSMichal Privoznik } 11873424fc9fSMichal Privoznik } else if (ifa->ifa_addr && 11883424fc9fSMichal Privoznik ifa->ifa_addr->sa_family == AF_INET6) { 11893424fc9fSMichal Privoznik /* interface with IPv6 address */ 11903424fc9fSMichal Privoznik p = &((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr; 11913424fc9fSMichal Privoznik if (!inet_ntop(AF_INET6, p, addr6, sizeof(addr6))) { 1192878a0ae0SLuiz Capitulino error_setg_errno(errp, errno, "inet_ntop failed"); 11933424fc9fSMichal Privoznik goto error; 11943424fc9fSMichal Privoznik } 11953424fc9fSMichal Privoznik 119610a2158fSMarkus Armbruster address_item = g_malloc0(sizeof(*address_item)); 119710a2158fSMarkus Armbruster address_item->value = g_malloc0(sizeof(*address_item->value)); 11983424fc9fSMichal Privoznik address_item->value->ip_address = g_strdup(addr6); 11993424fc9fSMichal Privoznik address_item->value->ip_address_type = GUEST_IP_ADDRESS_TYPE_IPV6; 12003424fc9fSMichal Privoznik 12013424fc9fSMichal Privoznik if (ifa->ifa_netmask) { 12023424fc9fSMichal Privoznik /* Count the number of set bits in netmask. 12033424fc9fSMichal Privoznik * This is safe as '1' and '0' cannot be shuffled in netmask. */ 12043424fc9fSMichal Privoznik p = &((struct sockaddr_in6 *)ifa->ifa_netmask)->sin6_addr; 12053424fc9fSMichal Privoznik address_item->value->prefix = 12063424fc9fSMichal Privoznik ctpop32(((uint32_t *) p)[0]) + 12073424fc9fSMichal Privoznik ctpop32(((uint32_t *) p)[1]) + 12083424fc9fSMichal Privoznik ctpop32(((uint32_t *) p)[2]) + 12093424fc9fSMichal Privoznik ctpop32(((uint32_t *) p)[3]); 12103424fc9fSMichal Privoznik } 12113424fc9fSMichal Privoznik } 12123424fc9fSMichal Privoznik 12133424fc9fSMichal Privoznik if (!address_item) { 12143424fc9fSMichal Privoznik continue; 12153424fc9fSMichal Privoznik } 12163424fc9fSMichal Privoznik 12173424fc9fSMichal Privoznik address_list = &info->value->ip_addresses; 12183424fc9fSMichal Privoznik 12193424fc9fSMichal Privoznik while (*address_list && (*address_list)->next) { 12203424fc9fSMichal Privoznik address_list = &(*address_list)->next; 12213424fc9fSMichal Privoznik } 12223424fc9fSMichal Privoznik 12233424fc9fSMichal Privoznik if (!*address_list) { 12243424fc9fSMichal Privoznik *address_list = address_item; 12253424fc9fSMichal Privoznik } else { 12263424fc9fSMichal Privoznik (*address_list)->next = address_item; 12273424fc9fSMichal Privoznik } 12283424fc9fSMichal Privoznik 12293424fc9fSMichal Privoznik info->value->has_ip_addresses = true; 12303424fc9fSMichal Privoznik 12313424fc9fSMichal Privoznik 12323424fc9fSMichal Privoznik } 12333424fc9fSMichal Privoznik 12343424fc9fSMichal Privoznik freeifaddrs(ifap); 12353424fc9fSMichal Privoznik return head; 12363424fc9fSMichal Privoznik 12373424fc9fSMichal Privoznik error: 12383424fc9fSMichal Privoznik freeifaddrs(ifap); 12393424fc9fSMichal Privoznik qapi_free_GuestNetworkInterfaceList(head); 12403424fc9fSMichal Privoznik return NULL; 12413424fc9fSMichal Privoznik } 12423424fc9fSMichal Privoznik 1243d2baff62SLaszlo Ersek #define SYSCONF_EXACT(name, err) sysconf_exact((name), #name, (err)) 1244d2baff62SLaszlo Ersek 1245d2baff62SLaszlo Ersek static long sysconf_exact(int name, const char *name_str, Error **err) 1246d2baff62SLaszlo Ersek { 1247d2baff62SLaszlo Ersek long ret; 1248d2baff62SLaszlo Ersek 1249d2baff62SLaszlo Ersek errno = 0; 1250d2baff62SLaszlo Ersek ret = sysconf(name); 1251d2baff62SLaszlo Ersek if (ret == -1) { 1252d2baff62SLaszlo Ersek if (errno == 0) { 1253d2baff62SLaszlo Ersek error_setg(err, "sysconf(%s): value indefinite", name_str); 1254d2baff62SLaszlo Ersek } else { 1255d2baff62SLaszlo Ersek error_setg_errno(err, errno, "sysconf(%s)", name_str); 1256d2baff62SLaszlo Ersek } 1257d2baff62SLaszlo Ersek } 1258d2baff62SLaszlo Ersek return ret; 1259d2baff62SLaszlo Ersek } 1260d2baff62SLaszlo Ersek 1261d2baff62SLaszlo Ersek /* Transfer online/offline status between @vcpu and the guest system. 1262d2baff62SLaszlo Ersek * 1263d2baff62SLaszlo Ersek * On input either @errp or *@errp must be NULL. 1264d2baff62SLaszlo Ersek * 1265d2baff62SLaszlo Ersek * In system-to-@vcpu direction, the following @vcpu fields are accessed: 1266d2baff62SLaszlo Ersek * - R: vcpu->logical_id 1267d2baff62SLaszlo Ersek * - W: vcpu->online 1268d2baff62SLaszlo Ersek * - W: vcpu->can_offline 1269d2baff62SLaszlo Ersek * 1270d2baff62SLaszlo Ersek * In @vcpu-to-system direction, the following @vcpu fields are accessed: 1271d2baff62SLaszlo Ersek * - R: vcpu->logical_id 1272d2baff62SLaszlo Ersek * - R: vcpu->online 1273d2baff62SLaszlo Ersek * 1274d2baff62SLaszlo Ersek * Written members remain unmodified on error. 1275d2baff62SLaszlo Ersek */ 1276d2baff62SLaszlo Ersek static void transfer_vcpu(GuestLogicalProcessor *vcpu, bool sys2vcpu, 1277d2baff62SLaszlo Ersek Error **errp) 1278d2baff62SLaszlo Ersek { 1279d2baff62SLaszlo Ersek char *dirpath; 1280d2baff62SLaszlo Ersek int dirfd; 1281d2baff62SLaszlo Ersek 1282d2baff62SLaszlo Ersek dirpath = g_strdup_printf("/sys/devices/system/cpu/cpu%" PRId64 "/", 1283d2baff62SLaszlo Ersek vcpu->logical_id); 1284d2baff62SLaszlo Ersek dirfd = open(dirpath, O_RDONLY | O_DIRECTORY); 1285d2baff62SLaszlo Ersek if (dirfd == -1) { 1286d2baff62SLaszlo Ersek error_setg_errno(errp, errno, "open(\"%s\")", dirpath); 1287d2baff62SLaszlo Ersek } else { 1288d2baff62SLaszlo Ersek static const char fn[] = "online"; 1289d2baff62SLaszlo Ersek int fd; 1290d2baff62SLaszlo Ersek int res; 1291d2baff62SLaszlo Ersek 1292d2baff62SLaszlo Ersek fd = openat(dirfd, fn, sys2vcpu ? O_RDONLY : O_RDWR); 1293d2baff62SLaszlo Ersek if (fd == -1) { 1294d2baff62SLaszlo Ersek if (errno != ENOENT) { 1295d2baff62SLaszlo Ersek error_setg_errno(errp, errno, "open(\"%s/%s\")", dirpath, fn); 1296d2baff62SLaszlo Ersek } else if (sys2vcpu) { 1297d2baff62SLaszlo Ersek vcpu->online = true; 1298d2baff62SLaszlo Ersek vcpu->can_offline = false; 1299d2baff62SLaszlo Ersek } else if (!vcpu->online) { 1300d2baff62SLaszlo Ersek error_setg(errp, "logical processor #%" PRId64 " can't be " 1301d2baff62SLaszlo Ersek "offlined", vcpu->logical_id); 1302d2baff62SLaszlo Ersek } /* otherwise pretend successful re-onlining */ 1303d2baff62SLaszlo Ersek } else { 1304d2baff62SLaszlo Ersek unsigned char status; 1305d2baff62SLaszlo Ersek 1306d2baff62SLaszlo Ersek res = pread(fd, &status, 1, 0); 1307d2baff62SLaszlo Ersek if (res == -1) { 1308d2baff62SLaszlo Ersek error_setg_errno(errp, errno, "pread(\"%s/%s\")", dirpath, fn); 1309d2baff62SLaszlo Ersek } else if (res == 0) { 1310d2baff62SLaszlo Ersek error_setg(errp, "pread(\"%s/%s\"): unexpected EOF", dirpath, 1311d2baff62SLaszlo Ersek fn); 1312d2baff62SLaszlo Ersek } else if (sys2vcpu) { 1313d2baff62SLaszlo Ersek vcpu->online = (status != '0'); 1314d2baff62SLaszlo Ersek vcpu->can_offline = true; 1315d2baff62SLaszlo Ersek } else if (vcpu->online != (status != '0')) { 1316d2baff62SLaszlo Ersek status = '0' + vcpu->online; 1317d2baff62SLaszlo Ersek if (pwrite(fd, &status, 1, 0) == -1) { 1318d2baff62SLaszlo Ersek error_setg_errno(errp, errno, "pwrite(\"%s/%s\")", dirpath, 1319d2baff62SLaszlo Ersek fn); 1320d2baff62SLaszlo Ersek } 1321d2baff62SLaszlo Ersek } /* otherwise pretend successful re-(on|off)-lining */ 1322d2baff62SLaszlo Ersek 1323d2baff62SLaszlo Ersek res = close(fd); 1324d2baff62SLaszlo Ersek g_assert(res == 0); 1325d2baff62SLaszlo Ersek } 1326d2baff62SLaszlo Ersek 1327d2baff62SLaszlo Ersek res = close(dirfd); 1328d2baff62SLaszlo Ersek g_assert(res == 0); 1329d2baff62SLaszlo Ersek } 1330d2baff62SLaszlo Ersek 1331d2baff62SLaszlo Ersek g_free(dirpath); 1332d2baff62SLaszlo Ersek } 1333d2baff62SLaszlo Ersek 1334d2baff62SLaszlo Ersek GuestLogicalProcessorList *qmp_guest_get_vcpus(Error **errp) 1335d2baff62SLaszlo Ersek { 1336d2baff62SLaszlo Ersek int64_t current; 1337d2baff62SLaszlo Ersek GuestLogicalProcessorList *head, **link; 1338d2baff62SLaszlo Ersek long sc_max; 1339d2baff62SLaszlo Ersek Error *local_err = NULL; 1340d2baff62SLaszlo Ersek 1341d2baff62SLaszlo Ersek current = 0; 1342d2baff62SLaszlo Ersek head = NULL; 1343d2baff62SLaszlo Ersek link = &head; 1344d2baff62SLaszlo Ersek sc_max = SYSCONF_EXACT(_SC_NPROCESSORS_CONF, &local_err); 1345d2baff62SLaszlo Ersek 1346d2baff62SLaszlo Ersek while (local_err == NULL && current < sc_max) { 1347d2baff62SLaszlo Ersek GuestLogicalProcessor *vcpu; 1348d2baff62SLaszlo Ersek GuestLogicalProcessorList *entry; 1349d2baff62SLaszlo Ersek 1350d2baff62SLaszlo Ersek vcpu = g_malloc0(sizeof *vcpu); 1351d2baff62SLaszlo Ersek vcpu->logical_id = current++; 1352d2baff62SLaszlo Ersek vcpu->has_can_offline = true; /* lolspeak ftw */ 1353d2baff62SLaszlo Ersek transfer_vcpu(vcpu, true, &local_err); 1354d2baff62SLaszlo Ersek 1355d2baff62SLaszlo Ersek entry = g_malloc0(sizeof *entry); 1356d2baff62SLaszlo Ersek entry->value = vcpu; 1357d2baff62SLaszlo Ersek 1358d2baff62SLaszlo Ersek *link = entry; 1359d2baff62SLaszlo Ersek link = &entry->next; 1360d2baff62SLaszlo Ersek } 1361d2baff62SLaszlo Ersek 1362d2baff62SLaszlo Ersek if (local_err == NULL) { 1363d2baff62SLaszlo Ersek /* there's no guest with zero VCPUs */ 1364d2baff62SLaszlo Ersek g_assert(head != NULL); 1365d2baff62SLaszlo Ersek return head; 1366d2baff62SLaszlo Ersek } 1367d2baff62SLaszlo Ersek 1368d2baff62SLaszlo Ersek qapi_free_GuestLogicalProcessorList(head); 1369d2baff62SLaszlo Ersek error_propagate(errp, local_err); 1370d2baff62SLaszlo Ersek return NULL; 1371d2baff62SLaszlo Ersek } 1372d2baff62SLaszlo Ersek 1373cbb65fc2SLaszlo Ersek int64_t qmp_guest_set_vcpus(GuestLogicalProcessorList *vcpus, Error **errp) 1374cbb65fc2SLaszlo Ersek { 1375cbb65fc2SLaszlo Ersek int64_t processed; 1376cbb65fc2SLaszlo Ersek Error *local_err = NULL; 1377cbb65fc2SLaszlo Ersek 1378cbb65fc2SLaszlo Ersek processed = 0; 1379cbb65fc2SLaszlo Ersek while (vcpus != NULL) { 1380cbb65fc2SLaszlo Ersek transfer_vcpu(vcpus->value, false, &local_err); 1381cbb65fc2SLaszlo Ersek if (local_err != NULL) { 1382cbb65fc2SLaszlo Ersek break; 1383cbb65fc2SLaszlo Ersek } 1384cbb65fc2SLaszlo Ersek ++processed; 1385cbb65fc2SLaszlo Ersek vcpus = vcpus->next; 1386cbb65fc2SLaszlo Ersek } 1387cbb65fc2SLaszlo Ersek 1388cbb65fc2SLaszlo Ersek if (local_err != NULL) { 1389cbb65fc2SLaszlo Ersek if (processed == 0) { 1390cbb65fc2SLaszlo Ersek error_propagate(errp, local_err); 1391cbb65fc2SLaszlo Ersek } else { 1392cbb65fc2SLaszlo Ersek error_free(local_err); 1393cbb65fc2SLaszlo Ersek } 1394cbb65fc2SLaszlo Ersek } 1395cbb65fc2SLaszlo Ersek 1396cbb65fc2SLaszlo Ersek return processed; 1397cbb65fc2SLaszlo Ersek } 1398cbb65fc2SLaszlo Ersek 1399e72c3f2eSMichael Roth #else /* defined(__linux__) */ 1400e72c3f2eSMichael Roth 1401e72c3f2eSMichael Roth void qmp_guest_suspend_disk(Error **err) 1402e72c3f2eSMichael Roth { 1403e72c3f2eSMichael Roth error_set(err, QERR_UNSUPPORTED); 1404e72c3f2eSMichael Roth } 1405e72c3f2eSMichael Roth 1406e72c3f2eSMichael Roth void qmp_guest_suspend_ram(Error **err) 1407e72c3f2eSMichael Roth { 1408e72c3f2eSMichael Roth error_set(err, QERR_UNSUPPORTED); 1409e72c3f2eSMichael Roth } 1410e72c3f2eSMichael Roth 1411e72c3f2eSMichael Roth void qmp_guest_suspend_hybrid(Error **err) 1412e72c3f2eSMichael Roth { 1413e72c3f2eSMichael Roth error_set(err, QERR_UNSUPPORTED); 1414e72c3f2eSMichael Roth } 1415e72c3f2eSMichael Roth 1416e72c3f2eSMichael Roth GuestNetworkInterfaceList *qmp_guest_network_get_interfaces(Error **errp) 1417e72c3f2eSMichael Roth { 1418e72c3f2eSMichael Roth error_set(errp, QERR_UNSUPPORTED); 1419e72c3f2eSMichael Roth return NULL; 1420e72c3f2eSMichael Roth } 1421e72c3f2eSMichael Roth 1422d2baff62SLaszlo Ersek GuestLogicalProcessorList *qmp_guest_get_vcpus(Error **errp) 1423d2baff62SLaszlo Ersek { 1424d2baff62SLaszlo Ersek error_set(errp, QERR_UNSUPPORTED); 1425d2baff62SLaszlo Ersek return NULL; 1426d2baff62SLaszlo Ersek } 1427d2baff62SLaszlo Ersek 1428cbb65fc2SLaszlo Ersek int64_t qmp_guest_set_vcpus(GuestLogicalProcessorList *vcpus, Error **errp) 1429cbb65fc2SLaszlo Ersek { 1430cbb65fc2SLaszlo Ersek error_set(errp, QERR_UNSUPPORTED); 1431cbb65fc2SLaszlo Ersek return -1; 1432cbb65fc2SLaszlo Ersek } 1433cbb65fc2SLaszlo Ersek 1434e72c3f2eSMichael Roth #endif 1435e72c3f2eSMichael Roth 1436d35d4cb5SMichael Roth #if !defined(CONFIG_FSFREEZE) 1437d35d4cb5SMichael Roth 1438d35d4cb5SMichael Roth GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **err) 1439d35d4cb5SMichael Roth { 1440d35d4cb5SMichael Roth error_set(err, QERR_UNSUPPORTED); 1441d35d4cb5SMichael Roth 1442d35d4cb5SMichael Roth return 0; 1443d35d4cb5SMichael Roth } 1444d35d4cb5SMichael Roth 1445d35d4cb5SMichael Roth int64_t qmp_guest_fsfreeze_freeze(Error **err) 1446d35d4cb5SMichael Roth { 1447d35d4cb5SMichael Roth error_set(err, QERR_UNSUPPORTED); 1448d35d4cb5SMichael Roth 1449d35d4cb5SMichael Roth return 0; 1450d35d4cb5SMichael Roth } 1451d35d4cb5SMichael Roth 1452d35d4cb5SMichael Roth int64_t qmp_guest_fsfreeze_thaw(Error **err) 1453d35d4cb5SMichael Roth { 1454d35d4cb5SMichael Roth error_set(err, QERR_UNSUPPORTED); 1455d35d4cb5SMichael Roth 1456d35d4cb5SMichael Roth return 0; 1457d35d4cb5SMichael Roth } 1458eab5fd59SPaolo Bonzini #endif /* CONFIG_FSFREEZE */ 1459d35d4cb5SMichael Roth 1460eab5fd59SPaolo Bonzini #if !defined(CONFIG_FSTRIM) 1461eab5fd59SPaolo Bonzini void qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **err) 1462eab5fd59SPaolo Bonzini { 1463eab5fd59SPaolo Bonzini error_set(err, QERR_UNSUPPORTED); 1464eab5fd59SPaolo Bonzini } 1465d35d4cb5SMichael Roth #endif 1466d35d4cb5SMichael Roth 1467c216e5adSMichael Roth /* register init/cleanup routines for stateful command groups */ 1468c216e5adSMichael Roth void ga_command_state_init(GAState *s, GACommandState *cs) 1469c216e5adSMichael Roth { 1470c216e5adSMichael Roth #if defined(CONFIG_FSFREEZE) 1471f22d85e9SMichael Roth ga_command_state_add(cs, NULL, guest_fsfreeze_cleanup); 1472c216e5adSMichael Roth #endif 1473c216e5adSMichael Roth ga_command_state_add(cs, guest_file_init, NULL); 1474c216e5adSMichael Roth } 1475