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 102485e741cSwhitearchey execle("/sbin/shutdown", "shutdown", "-h", 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 2458fe6bbcaSLaszlo Ersek #ifndef O_BINARY 2468fe6bbcaSLaszlo Ersek #define O_BINARY 0 2478fe6bbcaSLaszlo Ersek #endif 2488fe6bbcaSLaszlo 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[] = { 2548fe6bbcaSLaszlo Ersek { (ccpc[]){ "r", NULL }, O_RDONLY }, 2558fe6bbcaSLaszlo Ersek { (ccpc[]){ "rb", NULL }, O_RDONLY | O_BINARY }, 2568fe6bbcaSLaszlo Ersek { (ccpc[]){ "w", NULL }, O_WRONLY | O_CREAT | O_TRUNC }, 2578fe6bbcaSLaszlo Ersek { (ccpc[]){ "wb", NULL }, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY }, 2588fe6bbcaSLaszlo Ersek { (ccpc[]){ "a", NULL }, O_WRONLY | O_CREAT | O_APPEND }, 2598fe6bbcaSLaszlo Ersek { (ccpc[]){ "ab", NULL }, O_WRONLY | O_CREAT | O_APPEND | O_BINARY }, 2608fe6bbcaSLaszlo Ersek { (ccpc[]){ "r+", NULL }, O_RDWR }, 2618fe6bbcaSLaszlo Ersek { (ccpc[]){ "rb+", "r+b", NULL }, O_RDWR | O_BINARY }, 2628fe6bbcaSLaszlo Ersek { (ccpc[]){ "w+", NULL }, O_RDWR | O_CREAT | O_TRUNC }, 2638fe6bbcaSLaszlo Ersek { (ccpc[]){ "wb+", "w+b", NULL }, O_RDWR | O_CREAT | O_TRUNC | O_BINARY }, 2648fe6bbcaSLaszlo Ersek { (ccpc[]){ "a+", NULL }, O_RDWR | O_CREAT | O_APPEND }, 2658fe6bbcaSLaszlo 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); 3582b720018SLaszlo Ersek if (oflag & O_CREAT) { 3592b720018SLaszlo Ersek unlink(path); 3602b720018SLaszlo Ersek } 361c689b4f1SLaszlo Ersek } 362c689b4f1SLaszlo Ersek } 363c689b4f1SLaszlo Ersek 364c689b4f1SLaszlo Ersek error_propagate(err, local_err); 365c689b4f1SLaszlo Ersek return NULL; 366c689b4f1SLaszlo Ersek } 367c689b4f1SLaszlo Ersek 368c216e5adSMichael Roth int64_t qmp_guest_file_open(const char *path, bool has_mode, const char *mode, Error **err) 369c216e5adSMichael Roth { 370c216e5adSMichael Roth FILE *fh; 371c689b4f1SLaszlo Ersek Error *local_err = NULL; 372c216e5adSMichael Roth int fd; 37339097dafSMichael Roth int64_t ret = -1, handle; 374c216e5adSMichael Roth 375c216e5adSMichael Roth if (!has_mode) { 376c216e5adSMichael Roth mode = "r"; 377c216e5adSMichael Roth } 378c216e5adSMichael Roth slog("guest-file-open called, filepath: %s, mode: %s", path, mode); 379c689b4f1SLaszlo Ersek fh = safe_open_or_create(path, mode, &local_err); 380c689b4f1SLaszlo Ersek if (local_err != NULL) { 381c689b4f1SLaszlo Ersek error_propagate(err, local_err); 382c216e5adSMichael Roth return -1; 383c216e5adSMichael Roth } 384c216e5adSMichael Roth 385c216e5adSMichael Roth /* set fd non-blocking to avoid common use cases (like reading from a 386c216e5adSMichael Roth * named pipe) from hanging the agent 387c216e5adSMichael Roth */ 388c216e5adSMichael Roth fd = fileno(fh); 389c216e5adSMichael Roth ret = fcntl(fd, F_GETFL); 390c216e5adSMichael Roth ret = fcntl(fd, F_SETFL, ret | O_NONBLOCK); 391c216e5adSMichael Roth if (ret == -1) { 392db3edb66SLuiz Capitulino error_setg_errno(err, errno, "failed to make file '%s' non-blocking", 393db3edb66SLuiz Capitulino path); 394c216e5adSMichael Roth fclose(fh); 395c216e5adSMichael Roth return -1; 396c216e5adSMichael Roth } 397c216e5adSMichael Roth 39839097dafSMichael Roth handle = guest_file_handle_add(fh, err); 39939097dafSMichael Roth if (error_is_set(err)) { 40039097dafSMichael Roth fclose(fh); 40139097dafSMichael Roth return -1; 40239097dafSMichael Roth } 40339097dafSMichael Roth 404*d607a523SStefan Weil slog("guest-file-open, handle: %" PRId64, handle); 40539097dafSMichael Roth return handle; 406c216e5adSMichael Roth } 407c216e5adSMichael Roth 408c216e5adSMichael Roth void qmp_guest_file_close(int64_t handle, Error **err) 409c216e5adSMichael Roth { 410a9de6d01SLuiz Capitulino GuestFileHandle *gfh = guest_file_handle_find(handle, err); 411c216e5adSMichael Roth int ret; 412c216e5adSMichael Roth 413*d607a523SStefan Weil slog("guest-file-close called, handle: %" PRId64, handle); 414c216e5adSMichael Roth if (!gfh) { 415c216e5adSMichael Roth return; 416c216e5adSMichael Roth } 417c216e5adSMichael Roth 418c216e5adSMichael Roth ret = fclose(gfh->fh); 4193ac4b7c5SLuiz Capitulino if (ret == EOF) { 420db3edb66SLuiz Capitulino error_setg_errno(err, errno, "failed to close handle"); 421c216e5adSMichael Roth return; 422c216e5adSMichael Roth } 423c216e5adSMichael Roth 424c216e5adSMichael Roth QTAILQ_REMOVE(&guest_file_state.filehandles, gfh, next); 425c216e5adSMichael Roth g_free(gfh); 426c216e5adSMichael Roth } 427c216e5adSMichael Roth 428c216e5adSMichael Roth struct GuestFileRead *qmp_guest_file_read(int64_t handle, bool has_count, 429c216e5adSMichael Roth int64_t count, Error **err) 430c216e5adSMichael Roth { 431a9de6d01SLuiz Capitulino GuestFileHandle *gfh = guest_file_handle_find(handle, err); 432c216e5adSMichael Roth GuestFileRead *read_data = NULL; 433c216e5adSMichael Roth guchar *buf; 434c216e5adSMichael Roth FILE *fh; 435c216e5adSMichael Roth size_t read_count; 436c216e5adSMichael Roth 437c216e5adSMichael Roth if (!gfh) { 438c216e5adSMichael Roth return NULL; 439c216e5adSMichael Roth } 440c216e5adSMichael Roth 441c216e5adSMichael Roth if (!has_count) { 442c216e5adSMichael Roth count = QGA_READ_COUNT_DEFAULT; 443c216e5adSMichael Roth } else if (count < 0) { 444db3edb66SLuiz Capitulino error_setg(err, "value '%" PRId64 "' is invalid for argument count", 445db3edb66SLuiz Capitulino count); 446c216e5adSMichael Roth return NULL; 447c216e5adSMichael Roth } 448c216e5adSMichael Roth 449c216e5adSMichael Roth fh = gfh->fh; 450c216e5adSMichael Roth buf = g_malloc0(count+1); 451c216e5adSMichael Roth read_count = fread(buf, 1, count, fh); 452c216e5adSMichael Roth if (ferror(fh)) { 453db3edb66SLuiz Capitulino error_setg_errno(err, errno, "failed to read file"); 454*d607a523SStefan Weil slog("guest-file-read failed, handle: %" PRId64, handle); 455c216e5adSMichael Roth } else { 456c216e5adSMichael Roth buf[read_count] = 0; 457c216e5adSMichael Roth read_data = g_malloc0(sizeof(GuestFileRead)); 458c216e5adSMichael Roth read_data->count = read_count; 459c216e5adSMichael Roth read_data->eof = feof(fh); 460c216e5adSMichael Roth if (read_count) { 461c216e5adSMichael Roth read_data->buf_b64 = g_base64_encode(buf, read_count); 462c216e5adSMichael Roth } 463c216e5adSMichael Roth } 464c216e5adSMichael Roth g_free(buf); 465c216e5adSMichael Roth clearerr(fh); 466c216e5adSMichael Roth 467c216e5adSMichael Roth return read_data; 468c216e5adSMichael Roth } 469c216e5adSMichael Roth 470c216e5adSMichael Roth GuestFileWrite *qmp_guest_file_write(int64_t handle, const char *buf_b64, 471c216e5adSMichael Roth bool has_count, int64_t count, Error **err) 472c216e5adSMichael Roth { 473c216e5adSMichael Roth GuestFileWrite *write_data = NULL; 474c216e5adSMichael Roth guchar *buf; 475c216e5adSMichael Roth gsize buf_len; 476c216e5adSMichael Roth int write_count; 477a9de6d01SLuiz Capitulino GuestFileHandle *gfh = guest_file_handle_find(handle, err); 478c216e5adSMichael Roth FILE *fh; 479c216e5adSMichael Roth 480c216e5adSMichael Roth if (!gfh) { 481c216e5adSMichael Roth return NULL; 482c216e5adSMichael Roth } 483c216e5adSMichael Roth 484c216e5adSMichael Roth fh = gfh->fh; 485c216e5adSMichael Roth buf = g_base64_decode(buf_b64, &buf_len); 486c216e5adSMichael Roth 487c216e5adSMichael Roth if (!has_count) { 488c216e5adSMichael Roth count = buf_len; 489c216e5adSMichael Roth } else if (count < 0 || count > buf_len) { 490db3edb66SLuiz Capitulino error_setg(err, "value '%" PRId64 "' is invalid for argument count", 491db3edb66SLuiz Capitulino count); 492c216e5adSMichael Roth g_free(buf); 493c216e5adSMichael Roth return NULL; 494c216e5adSMichael Roth } 495c216e5adSMichael Roth 496c216e5adSMichael Roth write_count = fwrite(buf, 1, count, fh); 497c216e5adSMichael Roth if (ferror(fh)) { 498db3edb66SLuiz Capitulino error_setg_errno(err, errno, "failed to write to file"); 499*d607a523SStefan Weil slog("guest-file-write failed, handle: %" PRId64, handle); 500c216e5adSMichael Roth } else { 501c216e5adSMichael Roth write_data = g_malloc0(sizeof(GuestFileWrite)); 502c216e5adSMichael Roth write_data->count = write_count; 503c216e5adSMichael Roth write_data->eof = feof(fh); 504c216e5adSMichael Roth } 505c216e5adSMichael Roth g_free(buf); 506c216e5adSMichael Roth clearerr(fh); 507c216e5adSMichael Roth 508c216e5adSMichael Roth return write_data; 509c216e5adSMichael Roth } 510c216e5adSMichael Roth 511c216e5adSMichael Roth struct GuestFileSeek *qmp_guest_file_seek(int64_t handle, int64_t offset, 512c216e5adSMichael Roth int64_t whence, Error **err) 513c216e5adSMichael Roth { 514a9de6d01SLuiz Capitulino GuestFileHandle *gfh = guest_file_handle_find(handle, err); 515c216e5adSMichael Roth GuestFileSeek *seek_data = NULL; 516c216e5adSMichael Roth FILE *fh; 517c216e5adSMichael Roth int ret; 518c216e5adSMichael Roth 519c216e5adSMichael Roth if (!gfh) { 520c216e5adSMichael Roth return NULL; 521c216e5adSMichael Roth } 522c216e5adSMichael Roth 523c216e5adSMichael Roth fh = gfh->fh; 524c216e5adSMichael Roth ret = fseek(fh, offset, whence); 525c216e5adSMichael Roth if (ret == -1) { 526db3edb66SLuiz Capitulino error_setg_errno(err, errno, "failed to seek file"); 527c216e5adSMichael Roth } else { 528c216e5adSMichael Roth seek_data = g_malloc0(sizeof(GuestFileRead)); 529c216e5adSMichael Roth seek_data->position = ftell(fh); 530c216e5adSMichael Roth seek_data->eof = feof(fh); 531c216e5adSMichael Roth } 532c216e5adSMichael Roth clearerr(fh); 533c216e5adSMichael Roth 534c216e5adSMichael Roth return seek_data; 535c216e5adSMichael Roth } 536c216e5adSMichael Roth 537c216e5adSMichael Roth void qmp_guest_file_flush(int64_t handle, Error **err) 538c216e5adSMichael Roth { 539a9de6d01SLuiz Capitulino GuestFileHandle *gfh = guest_file_handle_find(handle, err); 540c216e5adSMichael Roth FILE *fh; 541c216e5adSMichael Roth int ret; 542c216e5adSMichael Roth 543c216e5adSMichael Roth if (!gfh) { 544c216e5adSMichael Roth return; 545c216e5adSMichael Roth } 546c216e5adSMichael Roth 547c216e5adSMichael Roth fh = gfh->fh; 548c216e5adSMichael Roth ret = fflush(fh); 549c216e5adSMichael Roth if (ret == EOF) { 550db3edb66SLuiz Capitulino error_setg_errno(err, errno, "failed to flush file"); 551c216e5adSMichael Roth } 552c216e5adSMichael Roth } 553c216e5adSMichael Roth 554c216e5adSMichael Roth static void guest_file_init(void) 555c216e5adSMichael Roth { 556c216e5adSMichael Roth QTAILQ_INIT(&guest_file_state.filehandles); 557c216e5adSMichael Roth } 558c216e5adSMichael Roth 559e72c3f2eSMichael Roth /* linux-specific implementations. avoid this if at all possible. */ 560e72c3f2eSMichael Roth #if defined(__linux__) 561e72c3f2eSMichael Roth 562eab5fd59SPaolo Bonzini #if defined(CONFIG_FSFREEZE) || defined(CONFIG_FSTRIM) 563af02203fSPaolo Bonzini typedef struct FsMount { 564c216e5adSMichael Roth char *dirname; 565c216e5adSMichael Roth char *devtype; 566af02203fSPaolo Bonzini QTAILQ_ENTRY(FsMount) next; 567af02203fSPaolo Bonzini } FsMount; 568c216e5adSMichael Roth 569e5d9adbdSTomoki Sekiyama typedef QTAILQ_HEAD(FsMountList, FsMount) FsMountList; 5709e8aded4SMichael Roth 571af02203fSPaolo Bonzini static void free_fs_mount_list(FsMountList *mounts) 572c216e5adSMichael Roth { 573af02203fSPaolo Bonzini FsMount *mount, *temp; 574c216e5adSMichael Roth 5759e8aded4SMichael Roth if (!mounts) { 5769e8aded4SMichael Roth return; 5779e8aded4SMichael Roth } 5789e8aded4SMichael Roth 5799e8aded4SMichael Roth QTAILQ_FOREACH_SAFE(mount, mounts, next, temp) { 5809e8aded4SMichael Roth QTAILQ_REMOVE(mounts, mount, next); 581c216e5adSMichael Roth g_free(mount->dirname); 582c216e5adSMichael Roth g_free(mount->devtype); 583c216e5adSMichael Roth g_free(mount); 584c216e5adSMichael Roth } 5859e8aded4SMichael Roth } 5869e8aded4SMichael Roth 5879e8aded4SMichael Roth /* 5889e8aded4SMichael Roth * Walk the mount table and build a list of local file systems 5899e8aded4SMichael Roth */ 590261551d1SLuiz Capitulino static void build_fs_mount_list(FsMountList *mounts, Error **err) 5919e8aded4SMichael Roth { 5929e8aded4SMichael Roth struct mntent *ment; 593af02203fSPaolo Bonzini FsMount *mount; 5949e2fa418SMichael Roth char const *mtab = "/proc/self/mounts"; 5959e8aded4SMichael Roth FILE *fp; 596c216e5adSMichael Roth 597c216e5adSMichael Roth fp = setmntent(mtab, "r"); 598c216e5adSMichael Roth if (!fp) { 599261551d1SLuiz Capitulino error_setg(err, "failed to open mtab file: '%s'", mtab); 600261551d1SLuiz Capitulino return; 601c216e5adSMichael Roth } 602c216e5adSMichael Roth 603c216e5adSMichael Roth while ((ment = getmntent(fp))) { 604c216e5adSMichael Roth /* 605c216e5adSMichael Roth * An entry which device name doesn't start with a '/' is 606c216e5adSMichael Roth * either a dummy file system or a network file system. 607c216e5adSMichael Roth * Add special handling for smbfs and cifs as is done by 608c216e5adSMichael Roth * coreutils as well. 609c216e5adSMichael Roth */ 610c216e5adSMichael Roth if ((ment->mnt_fsname[0] != '/') || 611c216e5adSMichael Roth (strcmp(ment->mnt_type, "smbfs") == 0) || 612c216e5adSMichael Roth (strcmp(ment->mnt_type, "cifs") == 0)) { 613c216e5adSMichael Roth continue; 614c216e5adSMichael Roth } 615c216e5adSMichael Roth 616af02203fSPaolo Bonzini mount = g_malloc0(sizeof(FsMount)); 617c216e5adSMichael Roth mount->dirname = g_strdup(ment->mnt_dir); 618c216e5adSMichael Roth mount->devtype = g_strdup(ment->mnt_type); 619c216e5adSMichael Roth 6209e8aded4SMichael Roth QTAILQ_INSERT_TAIL(mounts, mount, next); 621c216e5adSMichael Roth } 622c216e5adSMichael Roth 623c216e5adSMichael Roth endmntent(fp); 624c216e5adSMichael Roth } 625eab5fd59SPaolo Bonzini #endif 626eab5fd59SPaolo Bonzini 627eab5fd59SPaolo Bonzini #if defined(CONFIG_FSFREEZE) 628c216e5adSMichael Roth 629ec0f694cSTomoki Sekiyama typedef enum { 630ec0f694cSTomoki Sekiyama FSFREEZE_HOOK_THAW = 0, 631ec0f694cSTomoki Sekiyama FSFREEZE_HOOK_FREEZE, 632ec0f694cSTomoki Sekiyama } FsfreezeHookArg; 633ec0f694cSTomoki Sekiyama 634ec0f694cSTomoki Sekiyama const char *fsfreeze_hook_arg_string[] = { 635ec0f694cSTomoki Sekiyama "thaw", 636ec0f694cSTomoki Sekiyama "freeze", 637ec0f694cSTomoki Sekiyama }; 638ec0f694cSTomoki Sekiyama 639ec0f694cSTomoki Sekiyama static void execute_fsfreeze_hook(FsfreezeHookArg arg, Error **err) 640ec0f694cSTomoki Sekiyama { 641ec0f694cSTomoki Sekiyama int status; 642ec0f694cSTomoki Sekiyama pid_t pid; 643ec0f694cSTomoki Sekiyama const char *hook; 644ec0f694cSTomoki Sekiyama const char *arg_str = fsfreeze_hook_arg_string[arg]; 645ec0f694cSTomoki Sekiyama Error *local_err = NULL; 646ec0f694cSTomoki Sekiyama 647ec0f694cSTomoki Sekiyama hook = ga_fsfreeze_hook(ga_state); 648ec0f694cSTomoki Sekiyama if (!hook) { 649ec0f694cSTomoki Sekiyama return; 650ec0f694cSTomoki Sekiyama } 651ec0f694cSTomoki Sekiyama if (access(hook, X_OK) != 0) { 652ec0f694cSTomoki Sekiyama error_setg_errno(err, errno, "can't access fsfreeze hook '%s'", hook); 653ec0f694cSTomoki Sekiyama return; 654ec0f694cSTomoki Sekiyama } 655ec0f694cSTomoki Sekiyama 656ec0f694cSTomoki Sekiyama slog("executing fsfreeze hook with arg '%s'", arg_str); 657ec0f694cSTomoki Sekiyama pid = fork(); 658ec0f694cSTomoki Sekiyama if (pid == 0) { 659ec0f694cSTomoki Sekiyama setsid(); 660ec0f694cSTomoki Sekiyama reopen_fd_to_null(0); 661ec0f694cSTomoki Sekiyama reopen_fd_to_null(1); 662ec0f694cSTomoki Sekiyama reopen_fd_to_null(2); 663ec0f694cSTomoki Sekiyama 664ec0f694cSTomoki Sekiyama execle(hook, hook, arg_str, NULL, environ); 665ec0f694cSTomoki Sekiyama _exit(EXIT_FAILURE); 666ec0f694cSTomoki Sekiyama } else if (pid < 0) { 667ec0f694cSTomoki Sekiyama error_setg_errno(err, errno, "failed to create child process"); 668ec0f694cSTomoki Sekiyama return; 669ec0f694cSTomoki Sekiyama } 670ec0f694cSTomoki Sekiyama 671ec0f694cSTomoki Sekiyama ga_wait_child(pid, &status, &local_err); 672ec0f694cSTomoki Sekiyama if (error_is_set(&local_err)) { 673ec0f694cSTomoki Sekiyama error_propagate(err, local_err); 674ec0f694cSTomoki Sekiyama return; 675ec0f694cSTomoki Sekiyama } 676ec0f694cSTomoki Sekiyama 677ec0f694cSTomoki Sekiyama if (!WIFEXITED(status)) { 678ec0f694cSTomoki Sekiyama error_setg(err, "fsfreeze hook has terminated abnormally"); 679ec0f694cSTomoki Sekiyama return; 680ec0f694cSTomoki Sekiyama } 681ec0f694cSTomoki Sekiyama 682ec0f694cSTomoki Sekiyama status = WEXITSTATUS(status); 683ec0f694cSTomoki Sekiyama if (status) { 684ec0f694cSTomoki Sekiyama error_setg(err, "fsfreeze hook has failed with status %d", status); 685ec0f694cSTomoki Sekiyama return; 686ec0f694cSTomoki Sekiyama } 687ec0f694cSTomoki Sekiyama } 688ec0f694cSTomoki Sekiyama 689c216e5adSMichael Roth /* 690c216e5adSMichael Roth * Return status of freeze/thaw 691c216e5adSMichael Roth */ 692c216e5adSMichael Roth GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **err) 693c216e5adSMichael Roth { 694f22d85e9SMichael Roth if (ga_is_frozen(ga_state)) { 695f22d85e9SMichael Roth return GUEST_FSFREEZE_STATUS_FROZEN; 696f22d85e9SMichael Roth } 697f22d85e9SMichael Roth 698f22d85e9SMichael Roth return GUEST_FSFREEZE_STATUS_THAWED; 699c216e5adSMichael Roth } 700c216e5adSMichael Roth 701c216e5adSMichael Roth /* 702c216e5adSMichael Roth * Walk list of mounted file systems in the guest, and freeze the ones which 703c216e5adSMichael Roth * are real local file systems. 704c216e5adSMichael Roth */ 705c216e5adSMichael Roth int64_t qmp_guest_fsfreeze_freeze(Error **err) 706c216e5adSMichael Roth { 707c216e5adSMichael Roth int ret = 0, i = 0; 708af02203fSPaolo Bonzini FsMountList mounts; 709af02203fSPaolo Bonzini struct FsMount *mount; 710261551d1SLuiz Capitulino Error *local_err = NULL; 711c216e5adSMichael Roth int fd; 712c216e5adSMichael Roth 713c216e5adSMichael Roth slog("guest-fsfreeze called"); 714c216e5adSMichael Roth 715ec0f694cSTomoki Sekiyama execute_fsfreeze_hook(FSFREEZE_HOOK_FREEZE, &local_err); 716ec0f694cSTomoki Sekiyama if (error_is_set(&local_err)) { 717ec0f694cSTomoki Sekiyama error_propagate(err, local_err); 718ec0f694cSTomoki Sekiyama return -1; 719ec0f694cSTomoki Sekiyama } 720ec0f694cSTomoki Sekiyama 7219e8aded4SMichael Roth QTAILQ_INIT(&mounts); 722261551d1SLuiz Capitulino build_fs_mount_list(&mounts, &local_err); 723261551d1SLuiz Capitulino if (error_is_set(&local_err)) { 724261551d1SLuiz Capitulino error_propagate(err, local_err); 725261551d1SLuiz Capitulino return -1; 726c216e5adSMichael Roth } 727c216e5adSMichael Roth 728c216e5adSMichael Roth /* cannot risk guest agent blocking itself on a write in this state */ 729f22d85e9SMichael Roth ga_set_frozen(ga_state); 730c216e5adSMichael Roth 731e5d9adbdSTomoki Sekiyama QTAILQ_FOREACH_REVERSE(mount, &mounts, FsMountList, next) { 732c216e5adSMichael Roth fd = qemu_open(mount->dirname, O_RDONLY); 733c216e5adSMichael Roth if (fd == -1) { 734617fbbc1SLuiz Capitulino error_setg_errno(err, errno, "failed to open %s", mount->dirname); 735c216e5adSMichael Roth goto error; 736c216e5adSMichael Roth } 737c216e5adSMichael Roth 738c216e5adSMichael Roth /* we try to cull filesytems we know won't work in advance, but other 739c216e5adSMichael Roth * filesytems may not implement fsfreeze for less obvious reasons. 7409e8aded4SMichael Roth * these will report EOPNOTSUPP. we simply ignore these when tallying 7419e8aded4SMichael Roth * the number of frozen filesystems. 7429e8aded4SMichael Roth * 7439e8aded4SMichael Roth * any other error means a failure to freeze a filesystem we 7449e8aded4SMichael Roth * expect to be freezable, so return an error in those cases 7459e8aded4SMichael Roth * and return system to thawed state. 746c216e5adSMichael Roth */ 747c216e5adSMichael Roth ret = ioctl(fd, FIFREEZE); 7489e8aded4SMichael Roth if (ret == -1) { 7499e8aded4SMichael Roth if (errno != EOPNOTSUPP) { 750617fbbc1SLuiz Capitulino error_setg_errno(err, errno, "failed to freeze %s", 751617fbbc1SLuiz Capitulino mount->dirname); 752c216e5adSMichael Roth close(fd); 753c216e5adSMichael Roth goto error; 754c216e5adSMichael Roth } 7559e8aded4SMichael Roth } else { 756c216e5adSMichael Roth i++; 757c216e5adSMichael Roth } 7589e8aded4SMichael Roth close(fd); 7599e8aded4SMichael Roth } 760c216e5adSMichael Roth 761af02203fSPaolo Bonzini free_fs_mount_list(&mounts); 762c216e5adSMichael Roth return i; 763c216e5adSMichael Roth 764c216e5adSMichael Roth error: 765af02203fSPaolo Bonzini free_fs_mount_list(&mounts); 766c216e5adSMichael Roth qmp_guest_fsfreeze_thaw(NULL); 767c216e5adSMichael Roth return 0; 768c216e5adSMichael Roth } 769c216e5adSMichael Roth 770c216e5adSMichael Roth /* 771c216e5adSMichael Roth * Walk list of frozen file systems in the guest, and thaw them. 772c216e5adSMichael Roth */ 773c216e5adSMichael Roth int64_t qmp_guest_fsfreeze_thaw(Error **err) 774c216e5adSMichael Roth { 775c216e5adSMichael Roth int ret; 776af02203fSPaolo Bonzini FsMountList mounts; 777af02203fSPaolo Bonzini FsMount *mount; 7789e8aded4SMichael Roth int fd, i = 0, logged; 779261551d1SLuiz Capitulino Error *local_err = NULL; 780c216e5adSMichael Roth 7819e8aded4SMichael Roth QTAILQ_INIT(&mounts); 782261551d1SLuiz Capitulino build_fs_mount_list(&mounts, &local_err); 783261551d1SLuiz Capitulino if (error_is_set(&local_err)) { 784261551d1SLuiz Capitulino error_propagate(err, local_err); 7859e8aded4SMichael Roth return 0; 7869e8aded4SMichael Roth } 7879e8aded4SMichael Roth 7889e8aded4SMichael Roth QTAILQ_FOREACH(mount, &mounts, next) { 7899e8aded4SMichael Roth logged = false; 790c216e5adSMichael Roth fd = qemu_open(mount->dirname, O_RDONLY); 791c216e5adSMichael Roth if (fd == -1) { 792c216e5adSMichael Roth continue; 793c216e5adSMichael Roth } 7949e8aded4SMichael Roth /* we have no way of knowing whether a filesystem was actually unfrozen 7959e8aded4SMichael Roth * as a result of a successful call to FITHAW, only that if an error 7969e8aded4SMichael Roth * was returned the filesystem was *not* unfrozen by that particular 7979e8aded4SMichael Roth * call. 7989e8aded4SMichael Roth * 799a31f0531SJim Meyering * since multiple preceding FIFREEZEs require multiple calls to FITHAW 8009e8aded4SMichael Roth * to unfreeze, continuing issuing FITHAW until an error is returned, 8019e8aded4SMichael Roth * in which case either the filesystem is in an unfreezable state, or, 8029e8aded4SMichael Roth * more likely, it was thawed previously (and remains so afterward). 8039e8aded4SMichael Roth * 8049e8aded4SMichael Roth * also, since the most recent successful call is the one that did 8059e8aded4SMichael Roth * the actual unfreeze, we can use this to provide an accurate count 8069e8aded4SMichael Roth * of the number of filesystems unfrozen by guest-fsfreeze-thaw, which 8079e8aded4SMichael Roth * may * be useful for determining whether a filesystem was unfrozen 8089e8aded4SMichael Roth * during the freeze/thaw phase by a process other than qemu-ga. 8099e8aded4SMichael Roth */ 8109e8aded4SMichael Roth do { 811c216e5adSMichael Roth ret = ioctl(fd, FITHAW); 8129e8aded4SMichael Roth if (ret == 0 && !logged) { 813c216e5adSMichael Roth i++; 8149e8aded4SMichael Roth logged = true; 8159e8aded4SMichael Roth } 8169e8aded4SMichael Roth } while (ret == 0); 8179e8aded4SMichael Roth close(fd); 818c216e5adSMichael Roth } 819c216e5adSMichael Roth 820f22d85e9SMichael Roth ga_unset_frozen(ga_state); 821af02203fSPaolo Bonzini free_fs_mount_list(&mounts); 822ec0f694cSTomoki Sekiyama 823ec0f694cSTomoki Sekiyama execute_fsfreeze_hook(FSFREEZE_HOOK_THAW, err); 824ec0f694cSTomoki Sekiyama 825c216e5adSMichael Roth return i; 826c216e5adSMichael Roth } 827c216e5adSMichael Roth 828c216e5adSMichael Roth static void guest_fsfreeze_cleanup(void) 829c216e5adSMichael Roth { 830c216e5adSMichael Roth Error *err = NULL; 831c216e5adSMichael Roth 832f22d85e9SMichael Roth if (ga_is_frozen(ga_state) == GUEST_FSFREEZE_STATUS_FROZEN) { 8336f686749SMarkus Armbruster qmp_guest_fsfreeze_thaw(&err); 8346f686749SMarkus Armbruster if (err) { 8356f686749SMarkus Armbruster slog("failed to clean up frozen filesystems: %s", 8366f686749SMarkus Armbruster error_get_pretty(err)); 8376f686749SMarkus Armbruster error_free(err); 838c216e5adSMichael Roth } 839c216e5adSMichael Roth } 840c216e5adSMichael Roth } 841e72c3f2eSMichael Roth #endif /* CONFIG_FSFREEZE */ 842c216e5adSMichael Roth 843eab5fd59SPaolo Bonzini #if defined(CONFIG_FSTRIM) 844eab5fd59SPaolo Bonzini /* 845eab5fd59SPaolo Bonzini * Walk list of mounted file systems in the guest, and trim them. 846eab5fd59SPaolo Bonzini */ 847eab5fd59SPaolo Bonzini void qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **err) 848eab5fd59SPaolo Bonzini { 849eab5fd59SPaolo Bonzini int ret = 0; 850eab5fd59SPaolo Bonzini FsMountList mounts; 851eab5fd59SPaolo Bonzini struct FsMount *mount; 852eab5fd59SPaolo Bonzini int fd; 853261551d1SLuiz Capitulino Error *local_err = NULL; 854eab5fd59SPaolo Bonzini struct fstrim_range r = { 855eab5fd59SPaolo Bonzini .start = 0, 856eab5fd59SPaolo Bonzini .len = -1, 857eab5fd59SPaolo Bonzini .minlen = has_minimum ? minimum : 0, 858eab5fd59SPaolo Bonzini }; 859eab5fd59SPaolo Bonzini 860eab5fd59SPaolo Bonzini slog("guest-fstrim called"); 861eab5fd59SPaolo Bonzini 862eab5fd59SPaolo Bonzini QTAILQ_INIT(&mounts); 863261551d1SLuiz Capitulino build_fs_mount_list(&mounts, &local_err); 864261551d1SLuiz Capitulino if (error_is_set(&local_err)) { 865261551d1SLuiz Capitulino error_propagate(err, local_err); 866eab5fd59SPaolo Bonzini return; 867eab5fd59SPaolo Bonzini } 868eab5fd59SPaolo Bonzini 869eab5fd59SPaolo Bonzini QTAILQ_FOREACH(mount, &mounts, next) { 870eab5fd59SPaolo Bonzini fd = qemu_open(mount->dirname, O_RDONLY); 871eab5fd59SPaolo Bonzini if (fd == -1) { 872071673b0SLuiz Capitulino error_setg_errno(err, errno, "failed to open %s", mount->dirname); 873eab5fd59SPaolo Bonzini goto error; 874eab5fd59SPaolo Bonzini } 875eab5fd59SPaolo Bonzini 876eab5fd59SPaolo Bonzini /* We try to cull filesytems we know won't work in advance, but other 877eab5fd59SPaolo Bonzini * filesytems may not implement fstrim for less obvious reasons. These 878eab5fd59SPaolo Bonzini * will report EOPNOTSUPP; we simply ignore these errors. Any other 879eab5fd59SPaolo Bonzini * error means an unexpected error, so return it in those cases. In 880eab5fd59SPaolo Bonzini * some other cases ENOTTY will be reported (e.g. CD-ROMs). 881eab5fd59SPaolo Bonzini */ 882eab5fd59SPaolo Bonzini ret = ioctl(fd, FITRIM, &r); 883eab5fd59SPaolo Bonzini if (ret == -1) { 884eab5fd59SPaolo Bonzini if (errno != ENOTTY && errno != EOPNOTSUPP) { 885071673b0SLuiz Capitulino error_setg_errno(err, errno, "failed to trim %s", 886071673b0SLuiz Capitulino mount->dirname); 887eab5fd59SPaolo Bonzini close(fd); 888eab5fd59SPaolo Bonzini goto error; 889eab5fd59SPaolo Bonzini } 890eab5fd59SPaolo Bonzini } 891eab5fd59SPaolo Bonzini close(fd); 892eab5fd59SPaolo Bonzini } 893eab5fd59SPaolo Bonzini 894eab5fd59SPaolo Bonzini error: 895eab5fd59SPaolo Bonzini free_fs_mount_list(&mounts); 896eab5fd59SPaolo Bonzini } 897eab5fd59SPaolo Bonzini #endif /* CONFIG_FSTRIM */ 898eab5fd59SPaolo Bonzini 899eab5fd59SPaolo Bonzini 90011d0f125SLuiz Capitulino #define LINUX_SYS_STATE_FILE "/sys/power/state" 90111d0f125SLuiz Capitulino #define SUSPEND_SUPPORTED 0 90211d0f125SLuiz Capitulino #define SUSPEND_NOT_SUPPORTED 1 90311d0f125SLuiz Capitulino 90411d0f125SLuiz Capitulino static void bios_supports_mode(const char *pmutils_bin, const char *pmutils_arg, 90511d0f125SLuiz Capitulino const char *sysfile_str, Error **err) 90611d0f125SLuiz Capitulino { 9076b26e837SLuiz Capitulino Error *local_err = NULL; 90811d0f125SLuiz Capitulino char *pmutils_path; 9096b26e837SLuiz Capitulino pid_t pid; 910dc8764f0SLuiz Capitulino int status; 91111d0f125SLuiz Capitulino 91211d0f125SLuiz Capitulino pmutils_path = g_find_program_in_path(pmutils_bin); 91311d0f125SLuiz Capitulino 91411d0f125SLuiz Capitulino pid = fork(); 91511d0f125SLuiz Capitulino if (!pid) { 916dc8764f0SLuiz Capitulino char buf[32]; /* hopefully big enough */ 917dc8764f0SLuiz Capitulino ssize_t ret; 918dc8764f0SLuiz Capitulino int fd; 91911d0f125SLuiz Capitulino 92011d0f125SLuiz Capitulino setsid(); 92111d0f125SLuiz Capitulino reopen_fd_to_null(0); 92211d0f125SLuiz Capitulino reopen_fd_to_null(1); 92311d0f125SLuiz Capitulino reopen_fd_to_null(2); 92411d0f125SLuiz Capitulino 92511d0f125SLuiz Capitulino if (pmutils_path) { 92611d0f125SLuiz Capitulino execle(pmutils_path, pmutils_bin, pmutils_arg, NULL, environ); 92711d0f125SLuiz Capitulino } 92811d0f125SLuiz Capitulino 92911d0f125SLuiz Capitulino /* 93011d0f125SLuiz Capitulino * If we get here either pm-utils is not installed or execle() has 93111d0f125SLuiz Capitulino * failed. Let's try the manual method if the caller wants it. 93211d0f125SLuiz Capitulino */ 93311d0f125SLuiz Capitulino 93411d0f125SLuiz Capitulino if (!sysfile_str) { 93511d0f125SLuiz Capitulino _exit(SUSPEND_NOT_SUPPORTED); 93611d0f125SLuiz Capitulino } 93711d0f125SLuiz Capitulino 93811d0f125SLuiz Capitulino fd = open(LINUX_SYS_STATE_FILE, O_RDONLY); 93911d0f125SLuiz Capitulino if (fd < 0) { 94011d0f125SLuiz Capitulino _exit(SUSPEND_NOT_SUPPORTED); 94111d0f125SLuiz Capitulino } 94211d0f125SLuiz Capitulino 94311d0f125SLuiz Capitulino ret = read(fd, buf, sizeof(buf)-1); 94411d0f125SLuiz Capitulino if (ret <= 0) { 94511d0f125SLuiz Capitulino _exit(SUSPEND_NOT_SUPPORTED); 94611d0f125SLuiz Capitulino } 94711d0f125SLuiz Capitulino buf[ret] = '\0'; 94811d0f125SLuiz Capitulino 94911d0f125SLuiz Capitulino if (strstr(buf, sysfile_str)) { 95011d0f125SLuiz Capitulino _exit(SUSPEND_SUPPORTED); 95111d0f125SLuiz Capitulino } 95211d0f125SLuiz Capitulino 95311d0f125SLuiz Capitulino _exit(SUSPEND_NOT_SUPPORTED); 9546b26e837SLuiz Capitulino } else if (pid < 0) { 9556b26e837SLuiz Capitulino error_setg_errno(err, errno, "failed to create child process"); 9566b26e837SLuiz Capitulino goto out; 95711d0f125SLuiz Capitulino } 95811d0f125SLuiz Capitulino 9596b26e837SLuiz Capitulino ga_wait_child(pid, &status, &local_err); 9606b26e837SLuiz Capitulino if (error_is_set(&local_err)) { 9616b26e837SLuiz Capitulino error_propagate(err, local_err); 9626b26e837SLuiz Capitulino goto out; 96311d0f125SLuiz Capitulino } 96411d0f125SLuiz Capitulino 9656b26e837SLuiz Capitulino if (!WIFEXITED(status)) { 9666b26e837SLuiz Capitulino error_setg(err, "child process has terminated abnormally"); 9676b26e837SLuiz Capitulino goto out; 9686b26e837SLuiz Capitulino } 9696b26e837SLuiz Capitulino 970dc8764f0SLuiz Capitulino switch (WEXITSTATUS(status)) { 971dc8764f0SLuiz Capitulino case SUSPEND_SUPPORTED: 9726b26e837SLuiz Capitulino goto out; 973dc8764f0SLuiz Capitulino case SUSPEND_NOT_SUPPORTED: 9746b26e837SLuiz Capitulino error_setg(err, 9756b26e837SLuiz Capitulino "the requested suspend mode is not supported by the guest"); 9766b26e837SLuiz Capitulino goto out; 977dc8764f0SLuiz Capitulino default: 9786b26e837SLuiz Capitulino error_setg(err, 9796b26e837SLuiz Capitulino "the helper program '%s' returned an unexpected exit status" 9806b26e837SLuiz Capitulino " code (%d)", pmutils_path, WEXITSTATUS(status)); 9816b26e837SLuiz Capitulino goto out; 982dc8764f0SLuiz Capitulino } 98311d0f125SLuiz Capitulino 9846b26e837SLuiz Capitulino out: 9856b26e837SLuiz Capitulino g_free(pmutils_path); 98611d0f125SLuiz Capitulino } 98711d0f125SLuiz Capitulino 98811d0f125SLuiz Capitulino static void guest_suspend(const char *pmutils_bin, const char *sysfile_str, 98911d0f125SLuiz Capitulino Error **err) 99011d0f125SLuiz Capitulino { 9917b376087SLuiz Capitulino Error *local_err = NULL; 99211d0f125SLuiz Capitulino char *pmutils_path; 9937b376087SLuiz Capitulino pid_t pid; 994dc8764f0SLuiz Capitulino int status; 99511d0f125SLuiz Capitulino 99611d0f125SLuiz Capitulino pmutils_path = g_find_program_in_path(pmutils_bin); 99711d0f125SLuiz Capitulino 99811d0f125SLuiz Capitulino pid = fork(); 99911d0f125SLuiz Capitulino if (pid == 0) { 100011d0f125SLuiz Capitulino /* child */ 100111d0f125SLuiz Capitulino int fd; 100211d0f125SLuiz Capitulino 100311d0f125SLuiz Capitulino setsid(); 100411d0f125SLuiz Capitulino reopen_fd_to_null(0); 100511d0f125SLuiz Capitulino reopen_fd_to_null(1); 100611d0f125SLuiz Capitulino reopen_fd_to_null(2); 100711d0f125SLuiz Capitulino 100811d0f125SLuiz Capitulino if (pmutils_path) { 100911d0f125SLuiz Capitulino execle(pmutils_path, pmutils_bin, NULL, environ); 101011d0f125SLuiz Capitulino } 101111d0f125SLuiz Capitulino 101211d0f125SLuiz Capitulino /* 101311d0f125SLuiz Capitulino * If we get here either pm-utils is not installed or execle() has 101411d0f125SLuiz Capitulino * failed. Let's try the manual method if the caller wants it. 101511d0f125SLuiz Capitulino */ 101611d0f125SLuiz Capitulino 101711d0f125SLuiz Capitulino if (!sysfile_str) { 101811d0f125SLuiz Capitulino _exit(EXIT_FAILURE); 101911d0f125SLuiz Capitulino } 102011d0f125SLuiz Capitulino 102111d0f125SLuiz Capitulino fd = open(LINUX_SYS_STATE_FILE, O_WRONLY); 102211d0f125SLuiz Capitulino if (fd < 0) { 102311d0f125SLuiz Capitulino _exit(EXIT_FAILURE); 102411d0f125SLuiz Capitulino } 102511d0f125SLuiz Capitulino 102611d0f125SLuiz Capitulino if (write(fd, sysfile_str, strlen(sysfile_str)) < 0) { 102711d0f125SLuiz Capitulino _exit(EXIT_FAILURE); 102811d0f125SLuiz Capitulino } 102911d0f125SLuiz Capitulino 103011d0f125SLuiz Capitulino _exit(EXIT_SUCCESS); 10317b376087SLuiz Capitulino } else if (pid < 0) { 10327b376087SLuiz Capitulino error_setg_errno(err, errno, "failed to create child process"); 10337b376087SLuiz Capitulino goto out; 103411d0f125SLuiz Capitulino } 103511d0f125SLuiz Capitulino 10367b376087SLuiz Capitulino ga_wait_child(pid, &status, &local_err); 10377b376087SLuiz Capitulino if (error_is_set(&local_err)) { 10387b376087SLuiz Capitulino error_propagate(err, local_err); 10397b376087SLuiz Capitulino goto out; 10407b376087SLuiz Capitulino } 10417b376087SLuiz Capitulino 10427b376087SLuiz Capitulino if (!WIFEXITED(status)) { 10437b376087SLuiz Capitulino error_setg(err, "child process has terminated abnormally"); 10447b376087SLuiz Capitulino goto out; 10457b376087SLuiz Capitulino } 10467b376087SLuiz Capitulino 10477b376087SLuiz Capitulino if (WEXITSTATUS(status)) { 10487b376087SLuiz Capitulino error_setg(err, "child process has failed to suspend"); 10497b376087SLuiz Capitulino goto out; 10507b376087SLuiz Capitulino } 10517b376087SLuiz Capitulino 10527b376087SLuiz Capitulino out: 105311d0f125SLuiz Capitulino g_free(pmutils_path); 105411d0f125SLuiz Capitulino } 105511d0f125SLuiz Capitulino 105611d0f125SLuiz Capitulino void qmp_guest_suspend_disk(Error **err) 105711d0f125SLuiz Capitulino { 105811d0f125SLuiz Capitulino bios_supports_mode("pm-is-supported", "--hibernate", "disk", err); 105911d0f125SLuiz Capitulino if (error_is_set(err)) { 106011d0f125SLuiz Capitulino return; 106111d0f125SLuiz Capitulino } 106211d0f125SLuiz Capitulino 106311d0f125SLuiz Capitulino guest_suspend("pm-hibernate", "disk", err); 106411d0f125SLuiz Capitulino } 106511d0f125SLuiz Capitulino 1066fbf42210SLuiz Capitulino void qmp_guest_suspend_ram(Error **err) 1067fbf42210SLuiz Capitulino { 1068fbf42210SLuiz Capitulino bios_supports_mode("pm-is-supported", "--suspend", "mem", err); 1069fbf42210SLuiz Capitulino if (error_is_set(err)) { 1070fbf42210SLuiz Capitulino return; 1071fbf42210SLuiz Capitulino } 1072fbf42210SLuiz Capitulino 1073fbf42210SLuiz Capitulino guest_suspend("pm-suspend", "mem", err); 1074fbf42210SLuiz Capitulino } 1075fbf42210SLuiz Capitulino 107695f4f404SLuiz Capitulino void qmp_guest_suspend_hybrid(Error **err) 107795f4f404SLuiz Capitulino { 107895f4f404SLuiz Capitulino bios_supports_mode("pm-is-supported", "--suspend-hybrid", NULL, err); 107995f4f404SLuiz Capitulino if (error_is_set(err)) { 108095f4f404SLuiz Capitulino return; 108195f4f404SLuiz Capitulino } 108295f4f404SLuiz Capitulino 108395f4f404SLuiz Capitulino guest_suspend("pm-suspend-hybrid", NULL, err); 108495f4f404SLuiz Capitulino } 108595f4f404SLuiz Capitulino 10863424fc9fSMichal Privoznik static GuestNetworkInterfaceList * 10873424fc9fSMichal Privoznik guest_find_interface(GuestNetworkInterfaceList *head, 10883424fc9fSMichal Privoznik const char *name) 10893424fc9fSMichal Privoznik { 10903424fc9fSMichal Privoznik for (; head; head = head->next) { 10913424fc9fSMichal Privoznik if (strcmp(head->value->name, name) == 0) { 10923424fc9fSMichal Privoznik break; 10933424fc9fSMichal Privoznik } 10943424fc9fSMichal Privoznik } 10953424fc9fSMichal Privoznik 10963424fc9fSMichal Privoznik return head; 10973424fc9fSMichal Privoznik } 10983424fc9fSMichal Privoznik 10993424fc9fSMichal Privoznik /* 11003424fc9fSMichal Privoznik * Build information about guest interfaces 11013424fc9fSMichal Privoznik */ 11023424fc9fSMichal Privoznik GuestNetworkInterfaceList *qmp_guest_network_get_interfaces(Error **errp) 11033424fc9fSMichal Privoznik { 11043424fc9fSMichal Privoznik GuestNetworkInterfaceList *head = NULL, *cur_item = NULL; 11053424fc9fSMichal Privoznik struct ifaddrs *ifap, *ifa; 11063424fc9fSMichal Privoznik 11073424fc9fSMichal Privoznik if (getifaddrs(&ifap) < 0) { 1108878a0ae0SLuiz Capitulino error_setg_errno(errp, errno, "getifaddrs failed"); 11093424fc9fSMichal Privoznik goto error; 11103424fc9fSMichal Privoznik } 11113424fc9fSMichal Privoznik 11123424fc9fSMichal Privoznik for (ifa = ifap; ifa; ifa = ifa->ifa_next) { 11133424fc9fSMichal Privoznik GuestNetworkInterfaceList *info; 11143424fc9fSMichal Privoznik GuestIpAddressList **address_list = NULL, *address_item = NULL; 11153424fc9fSMichal Privoznik char addr4[INET_ADDRSTRLEN]; 11163424fc9fSMichal Privoznik char addr6[INET6_ADDRSTRLEN]; 11173424fc9fSMichal Privoznik int sock; 11183424fc9fSMichal Privoznik struct ifreq ifr; 11193424fc9fSMichal Privoznik unsigned char *mac_addr; 11203424fc9fSMichal Privoznik void *p; 11213424fc9fSMichal Privoznik 11223424fc9fSMichal Privoznik g_debug("Processing %s interface", ifa->ifa_name); 11233424fc9fSMichal Privoznik 11243424fc9fSMichal Privoznik info = guest_find_interface(head, ifa->ifa_name); 11253424fc9fSMichal Privoznik 11263424fc9fSMichal Privoznik if (!info) { 11273424fc9fSMichal Privoznik info = g_malloc0(sizeof(*info)); 11283424fc9fSMichal Privoznik info->value = g_malloc0(sizeof(*info->value)); 11293424fc9fSMichal Privoznik info->value->name = g_strdup(ifa->ifa_name); 11303424fc9fSMichal Privoznik 11313424fc9fSMichal Privoznik if (!cur_item) { 11323424fc9fSMichal Privoznik head = cur_item = info; 11333424fc9fSMichal Privoznik } else { 11343424fc9fSMichal Privoznik cur_item->next = info; 11353424fc9fSMichal Privoznik cur_item = info; 11363424fc9fSMichal Privoznik } 11373424fc9fSMichal Privoznik } 11383424fc9fSMichal Privoznik 11393424fc9fSMichal Privoznik if (!info->value->has_hardware_address && 11403424fc9fSMichal Privoznik ifa->ifa_flags & SIOCGIFHWADDR) { 11413424fc9fSMichal Privoznik /* we haven't obtained HW address yet */ 11423424fc9fSMichal Privoznik sock = socket(PF_INET, SOCK_STREAM, 0); 11433424fc9fSMichal Privoznik if (sock == -1) { 1144878a0ae0SLuiz Capitulino error_setg_errno(errp, errno, "failed to create socket"); 11453424fc9fSMichal Privoznik goto error; 11463424fc9fSMichal Privoznik } 11473424fc9fSMichal Privoznik 11483424fc9fSMichal Privoznik memset(&ifr, 0, sizeof(ifr)); 11491ab516edSJim Meyering pstrcpy(ifr.ifr_name, IF_NAMESIZE, info->value->name); 11503424fc9fSMichal Privoznik if (ioctl(sock, SIOCGIFHWADDR, &ifr) == -1) { 1151878a0ae0SLuiz Capitulino error_setg_errno(errp, errno, 1152878a0ae0SLuiz Capitulino "failed to get MAC address of %s", 1153878a0ae0SLuiz Capitulino ifa->ifa_name); 115410a2158fSMarkus Armbruster close(sock); 11553424fc9fSMichal Privoznik goto error; 11563424fc9fSMichal Privoznik } 11573424fc9fSMichal Privoznik 115810a2158fSMarkus Armbruster close(sock); 11593424fc9fSMichal Privoznik mac_addr = (unsigned char *) &ifr.ifr_hwaddr.sa_data; 11603424fc9fSMichal Privoznik 1161e4ada482SStefan Weil info->value->hardware_address = 1162e4ada482SStefan Weil g_strdup_printf("%02x:%02x:%02x:%02x:%02x:%02x", 11633424fc9fSMichal Privoznik (int) mac_addr[0], (int) mac_addr[1], 11643424fc9fSMichal Privoznik (int) mac_addr[2], (int) mac_addr[3], 1165e4ada482SStefan Weil (int) mac_addr[4], (int) mac_addr[5]); 11663424fc9fSMichal Privoznik 11673424fc9fSMichal Privoznik info->value->has_hardware_address = true; 11683424fc9fSMichal Privoznik } 11693424fc9fSMichal Privoznik 11703424fc9fSMichal Privoznik if (ifa->ifa_addr && 11713424fc9fSMichal Privoznik ifa->ifa_addr->sa_family == AF_INET) { 11723424fc9fSMichal Privoznik /* interface with IPv4 address */ 11733424fc9fSMichal Privoznik p = &((struct sockaddr_in *)ifa->ifa_addr)->sin_addr; 11743424fc9fSMichal Privoznik if (!inet_ntop(AF_INET, p, addr4, sizeof(addr4))) { 1175878a0ae0SLuiz Capitulino error_setg_errno(errp, errno, "inet_ntop failed"); 11763424fc9fSMichal Privoznik goto error; 11773424fc9fSMichal Privoznik } 11783424fc9fSMichal Privoznik 117910a2158fSMarkus Armbruster address_item = g_malloc0(sizeof(*address_item)); 118010a2158fSMarkus Armbruster address_item->value = g_malloc0(sizeof(*address_item->value)); 11813424fc9fSMichal Privoznik address_item->value->ip_address = g_strdup(addr4); 11823424fc9fSMichal Privoznik address_item->value->ip_address_type = GUEST_IP_ADDRESS_TYPE_IPV4; 11833424fc9fSMichal Privoznik 11843424fc9fSMichal Privoznik if (ifa->ifa_netmask) { 11853424fc9fSMichal Privoznik /* Count the number of set bits in netmask. 11863424fc9fSMichal Privoznik * This is safe as '1' and '0' cannot be shuffled in netmask. */ 11873424fc9fSMichal Privoznik p = &((struct sockaddr_in *)ifa->ifa_netmask)->sin_addr; 11883424fc9fSMichal Privoznik address_item->value->prefix = ctpop32(((uint32_t *) p)[0]); 11893424fc9fSMichal Privoznik } 11903424fc9fSMichal Privoznik } else if (ifa->ifa_addr && 11913424fc9fSMichal Privoznik ifa->ifa_addr->sa_family == AF_INET6) { 11923424fc9fSMichal Privoznik /* interface with IPv6 address */ 11933424fc9fSMichal Privoznik p = &((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr; 11943424fc9fSMichal Privoznik if (!inet_ntop(AF_INET6, p, addr6, sizeof(addr6))) { 1195878a0ae0SLuiz Capitulino error_setg_errno(errp, errno, "inet_ntop failed"); 11963424fc9fSMichal Privoznik goto error; 11973424fc9fSMichal Privoznik } 11983424fc9fSMichal Privoznik 119910a2158fSMarkus Armbruster address_item = g_malloc0(sizeof(*address_item)); 120010a2158fSMarkus Armbruster address_item->value = g_malloc0(sizeof(*address_item->value)); 12013424fc9fSMichal Privoznik address_item->value->ip_address = g_strdup(addr6); 12023424fc9fSMichal Privoznik address_item->value->ip_address_type = GUEST_IP_ADDRESS_TYPE_IPV6; 12033424fc9fSMichal Privoznik 12043424fc9fSMichal Privoznik if (ifa->ifa_netmask) { 12053424fc9fSMichal Privoznik /* Count the number of set bits in netmask. 12063424fc9fSMichal Privoznik * This is safe as '1' and '0' cannot be shuffled in netmask. */ 12073424fc9fSMichal Privoznik p = &((struct sockaddr_in6 *)ifa->ifa_netmask)->sin6_addr; 12083424fc9fSMichal Privoznik address_item->value->prefix = 12093424fc9fSMichal Privoznik ctpop32(((uint32_t *) p)[0]) + 12103424fc9fSMichal Privoznik ctpop32(((uint32_t *) p)[1]) + 12113424fc9fSMichal Privoznik ctpop32(((uint32_t *) p)[2]) + 12123424fc9fSMichal Privoznik ctpop32(((uint32_t *) p)[3]); 12133424fc9fSMichal Privoznik } 12143424fc9fSMichal Privoznik } 12153424fc9fSMichal Privoznik 12163424fc9fSMichal Privoznik if (!address_item) { 12173424fc9fSMichal Privoznik continue; 12183424fc9fSMichal Privoznik } 12193424fc9fSMichal Privoznik 12203424fc9fSMichal Privoznik address_list = &info->value->ip_addresses; 12213424fc9fSMichal Privoznik 12223424fc9fSMichal Privoznik while (*address_list && (*address_list)->next) { 12233424fc9fSMichal Privoznik address_list = &(*address_list)->next; 12243424fc9fSMichal Privoznik } 12253424fc9fSMichal Privoznik 12263424fc9fSMichal Privoznik if (!*address_list) { 12273424fc9fSMichal Privoznik *address_list = address_item; 12283424fc9fSMichal Privoznik } else { 12293424fc9fSMichal Privoznik (*address_list)->next = address_item; 12303424fc9fSMichal Privoznik } 12313424fc9fSMichal Privoznik 12323424fc9fSMichal Privoznik info->value->has_ip_addresses = true; 12333424fc9fSMichal Privoznik 12343424fc9fSMichal Privoznik 12353424fc9fSMichal Privoznik } 12363424fc9fSMichal Privoznik 12373424fc9fSMichal Privoznik freeifaddrs(ifap); 12383424fc9fSMichal Privoznik return head; 12393424fc9fSMichal Privoznik 12403424fc9fSMichal Privoznik error: 12413424fc9fSMichal Privoznik freeifaddrs(ifap); 12423424fc9fSMichal Privoznik qapi_free_GuestNetworkInterfaceList(head); 12433424fc9fSMichal Privoznik return NULL; 12443424fc9fSMichal Privoznik } 12453424fc9fSMichal Privoznik 1246d2baff62SLaszlo Ersek #define SYSCONF_EXACT(name, err) sysconf_exact((name), #name, (err)) 1247d2baff62SLaszlo Ersek 1248d2baff62SLaszlo Ersek static long sysconf_exact(int name, const char *name_str, Error **err) 1249d2baff62SLaszlo Ersek { 1250d2baff62SLaszlo Ersek long ret; 1251d2baff62SLaszlo Ersek 1252d2baff62SLaszlo Ersek errno = 0; 1253d2baff62SLaszlo Ersek ret = sysconf(name); 1254d2baff62SLaszlo Ersek if (ret == -1) { 1255d2baff62SLaszlo Ersek if (errno == 0) { 1256d2baff62SLaszlo Ersek error_setg(err, "sysconf(%s): value indefinite", name_str); 1257d2baff62SLaszlo Ersek } else { 1258d2baff62SLaszlo Ersek error_setg_errno(err, errno, "sysconf(%s)", name_str); 1259d2baff62SLaszlo Ersek } 1260d2baff62SLaszlo Ersek } 1261d2baff62SLaszlo Ersek return ret; 1262d2baff62SLaszlo Ersek } 1263d2baff62SLaszlo Ersek 1264d2baff62SLaszlo Ersek /* Transfer online/offline status between @vcpu and the guest system. 1265d2baff62SLaszlo Ersek * 1266d2baff62SLaszlo Ersek * On input either @errp or *@errp must be NULL. 1267d2baff62SLaszlo Ersek * 1268d2baff62SLaszlo Ersek * In system-to-@vcpu direction, the following @vcpu fields are accessed: 1269d2baff62SLaszlo Ersek * - R: vcpu->logical_id 1270d2baff62SLaszlo Ersek * - W: vcpu->online 1271d2baff62SLaszlo Ersek * - W: vcpu->can_offline 1272d2baff62SLaszlo Ersek * 1273d2baff62SLaszlo Ersek * In @vcpu-to-system direction, the following @vcpu fields are accessed: 1274d2baff62SLaszlo Ersek * - R: vcpu->logical_id 1275d2baff62SLaszlo Ersek * - R: vcpu->online 1276d2baff62SLaszlo Ersek * 1277d2baff62SLaszlo Ersek * Written members remain unmodified on error. 1278d2baff62SLaszlo Ersek */ 1279d2baff62SLaszlo Ersek static void transfer_vcpu(GuestLogicalProcessor *vcpu, bool sys2vcpu, 1280d2baff62SLaszlo Ersek Error **errp) 1281d2baff62SLaszlo Ersek { 1282d2baff62SLaszlo Ersek char *dirpath; 1283d2baff62SLaszlo Ersek int dirfd; 1284d2baff62SLaszlo Ersek 1285d2baff62SLaszlo Ersek dirpath = g_strdup_printf("/sys/devices/system/cpu/cpu%" PRId64 "/", 1286d2baff62SLaszlo Ersek vcpu->logical_id); 1287d2baff62SLaszlo Ersek dirfd = open(dirpath, O_RDONLY | O_DIRECTORY); 1288d2baff62SLaszlo Ersek if (dirfd == -1) { 1289d2baff62SLaszlo Ersek error_setg_errno(errp, errno, "open(\"%s\")", dirpath); 1290d2baff62SLaszlo Ersek } else { 1291d2baff62SLaszlo Ersek static const char fn[] = "online"; 1292d2baff62SLaszlo Ersek int fd; 1293d2baff62SLaszlo Ersek int res; 1294d2baff62SLaszlo Ersek 1295d2baff62SLaszlo Ersek fd = openat(dirfd, fn, sys2vcpu ? O_RDONLY : O_RDWR); 1296d2baff62SLaszlo Ersek if (fd == -1) { 1297d2baff62SLaszlo Ersek if (errno != ENOENT) { 1298d2baff62SLaszlo Ersek error_setg_errno(errp, errno, "open(\"%s/%s\")", dirpath, fn); 1299d2baff62SLaszlo Ersek } else if (sys2vcpu) { 1300d2baff62SLaszlo Ersek vcpu->online = true; 1301d2baff62SLaszlo Ersek vcpu->can_offline = false; 1302d2baff62SLaszlo Ersek } else if (!vcpu->online) { 1303d2baff62SLaszlo Ersek error_setg(errp, "logical processor #%" PRId64 " can't be " 1304d2baff62SLaszlo Ersek "offlined", vcpu->logical_id); 1305d2baff62SLaszlo Ersek } /* otherwise pretend successful re-onlining */ 1306d2baff62SLaszlo Ersek } else { 1307d2baff62SLaszlo Ersek unsigned char status; 1308d2baff62SLaszlo Ersek 1309d2baff62SLaszlo Ersek res = pread(fd, &status, 1, 0); 1310d2baff62SLaszlo Ersek if (res == -1) { 1311d2baff62SLaszlo Ersek error_setg_errno(errp, errno, "pread(\"%s/%s\")", dirpath, fn); 1312d2baff62SLaszlo Ersek } else if (res == 0) { 1313d2baff62SLaszlo Ersek error_setg(errp, "pread(\"%s/%s\"): unexpected EOF", dirpath, 1314d2baff62SLaszlo Ersek fn); 1315d2baff62SLaszlo Ersek } else if (sys2vcpu) { 1316d2baff62SLaszlo Ersek vcpu->online = (status != '0'); 1317d2baff62SLaszlo Ersek vcpu->can_offline = true; 1318d2baff62SLaszlo Ersek } else if (vcpu->online != (status != '0')) { 1319d2baff62SLaszlo Ersek status = '0' + vcpu->online; 1320d2baff62SLaszlo Ersek if (pwrite(fd, &status, 1, 0) == -1) { 1321d2baff62SLaszlo Ersek error_setg_errno(errp, errno, "pwrite(\"%s/%s\")", dirpath, 1322d2baff62SLaszlo Ersek fn); 1323d2baff62SLaszlo Ersek } 1324d2baff62SLaszlo Ersek } /* otherwise pretend successful re-(on|off)-lining */ 1325d2baff62SLaszlo Ersek 1326d2baff62SLaszlo Ersek res = close(fd); 1327d2baff62SLaszlo Ersek g_assert(res == 0); 1328d2baff62SLaszlo Ersek } 1329d2baff62SLaszlo Ersek 1330d2baff62SLaszlo Ersek res = close(dirfd); 1331d2baff62SLaszlo Ersek g_assert(res == 0); 1332d2baff62SLaszlo Ersek } 1333d2baff62SLaszlo Ersek 1334d2baff62SLaszlo Ersek g_free(dirpath); 1335d2baff62SLaszlo Ersek } 1336d2baff62SLaszlo Ersek 1337d2baff62SLaszlo Ersek GuestLogicalProcessorList *qmp_guest_get_vcpus(Error **errp) 1338d2baff62SLaszlo Ersek { 1339d2baff62SLaszlo Ersek int64_t current; 1340d2baff62SLaszlo Ersek GuestLogicalProcessorList *head, **link; 1341d2baff62SLaszlo Ersek long sc_max; 1342d2baff62SLaszlo Ersek Error *local_err = NULL; 1343d2baff62SLaszlo Ersek 1344d2baff62SLaszlo Ersek current = 0; 1345d2baff62SLaszlo Ersek head = NULL; 1346d2baff62SLaszlo Ersek link = &head; 1347d2baff62SLaszlo Ersek sc_max = SYSCONF_EXACT(_SC_NPROCESSORS_CONF, &local_err); 1348d2baff62SLaszlo Ersek 1349d2baff62SLaszlo Ersek while (local_err == NULL && current < sc_max) { 1350d2baff62SLaszlo Ersek GuestLogicalProcessor *vcpu; 1351d2baff62SLaszlo Ersek GuestLogicalProcessorList *entry; 1352d2baff62SLaszlo Ersek 1353d2baff62SLaszlo Ersek vcpu = g_malloc0(sizeof *vcpu); 1354d2baff62SLaszlo Ersek vcpu->logical_id = current++; 1355d2baff62SLaszlo Ersek vcpu->has_can_offline = true; /* lolspeak ftw */ 1356d2baff62SLaszlo Ersek transfer_vcpu(vcpu, true, &local_err); 1357d2baff62SLaszlo Ersek 1358d2baff62SLaszlo Ersek entry = g_malloc0(sizeof *entry); 1359d2baff62SLaszlo Ersek entry->value = vcpu; 1360d2baff62SLaszlo Ersek 1361d2baff62SLaszlo Ersek *link = entry; 1362d2baff62SLaszlo Ersek link = &entry->next; 1363d2baff62SLaszlo Ersek } 1364d2baff62SLaszlo Ersek 1365d2baff62SLaszlo Ersek if (local_err == NULL) { 1366d2baff62SLaszlo Ersek /* there's no guest with zero VCPUs */ 1367d2baff62SLaszlo Ersek g_assert(head != NULL); 1368d2baff62SLaszlo Ersek return head; 1369d2baff62SLaszlo Ersek } 1370d2baff62SLaszlo Ersek 1371d2baff62SLaszlo Ersek qapi_free_GuestLogicalProcessorList(head); 1372d2baff62SLaszlo Ersek error_propagate(errp, local_err); 1373d2baff62SLaszlo Ersek return NULL; 1374d2baff62SLaszlo Ersek } 1375d2baff62SLaszlo Ersek 1376cbb65fc2SLaszlo Ersek int64_t qmp_guest_set_vcpus(GuestLogicalProcessorList *vcpus, Error **errp) 1377cbb65fc2SLaszlo Ersek { 1378cbb65fc2SLaszlo Ersek int64_t processed; 1379cbb65fc2SLaszlo Ersek Error *local_err = NULL; 1380cbb65fc2SLaszlo Ersek 1381cbb65fc2SLaszlo Ersek processed = 0; 1382cbb65fc2SLaszlo Ersek while (vcpus != NULL) { 1383cbb65fc2SLaszlo Ersek transfer_vcpu(vcpus->value, false, &local_err); 1384cbb65fc2SLaszlo Ersek if (local_err != NULL) { 1385cbb65fc2SLaszlo Ersek break; 1386cbb65fc2SLaszlo Ersek } 1387cbb65fc2SLaszlo Ersek ++processed; 1388cbb65fc2SLaszlo Ersek vcpus = vcpus->next; 1389cbb65fc2SLaszlo Ersek } 1390cbb65fc2SLaszlo Ersek 1391cbb65fc2SLaszlo Ersek if (local_err != NULL) { 1392cbb65fc2SLaszlo Ersek if (processed == 0) { 1393cbb65fc2SLaszlo Ersek error_propagate(errp, local_err); 1394cbb65fc2SLaszlo Ersek } else { 1395cbb65fc2SLaszlo Ersek error_free(local_err); 1396cbb65fc2SLaszlo Ersek } 1397cbb65fc2SLaszlo Ersek } 1398cbb65fc2SLaszlo Ersek 1399cbb65fc2SLaszlo Ersek return processed; 1400cbb65fc2SLaszlo Ersek } 1401cbb65fc2SLaszlo Ersek 1402e72c3f2eSMichael Roth #else /* defined(__linux__) */ 1403e72c3f2eSMichael Roth 1404e72c3f2eSMichael Roth void qmp_guest_suspend_disk(Error **err) 1405e72c3f2eSMichael Roth { 1406e72c3f2eSMichael Roth error_set(err, QERR_UNSUPPORTED); 1407e72c3f2eSMichael Roth } 1408e72c3f2eSMichael Roth 1409e72c3f2eSMichael Roth void qmp_guest_suspend_ram(Error **err) 1410e72c3f2eSMichael Roth { 1411e72c3f2eSMichael Roth error_set(err, QERR_UNSUPPORTED); 1412e72c3f2eSMichael Roth } 1413e72c3f2eSMichael Roth 1414e72c3f2eSMichael Roth void qmp_guest_suspend_hybrid(Error **err) 1415e72c3f2eSMichael Roth { 1416e72c3f2eSMichael Roth error_set(err, QERR_UNSUPPORTED); 1417e72c3f2eSMichael Roth } 1418e72c3f2eSMichael Roth 1419e72c3f2eSMichael Roth GuestNetworkInterfaceList *qmp_guest_network_get_interfaces(Error **errp) 1420e72c3f2eSMichael Roth { 1421e72c3f2eSMichael Roth error_set(errp, QERR_UNSUPPORTED); 1422e72c3f2eSMichael Roth return NULL; 1423e72c3f2eSMichael Roth } 1424e72c3f2eSMichael Roth 1425d2baff62SLaszlo Ersek GuestLogicalProcessorList *qmp_guest_get_vcpus(Error **errp) 1426d2baff62SLaszlo Ersek { 1427d2baff62SLaszlo Ersek error_set(errp, QERR_UNSUPPORTED); 1428d2baff62SLaszlo Ersek return NULL; 1429d2baff62SLaszlo Ersek } 1430d2baff62SLaszlo Ersek 1431cbb65fc2SLaszlo Ersek int64_t qmp_guest_set_vcpus(GuestLogicalProcessorList *vcpus, Error **errp) 1432cbb65fc2SLaszlo Ersek { 1433cbb65fc2SLaszlo Ersek error_set(errp, QERR_UNSUPPORTED); 1434cbb65fc2SLaszlo Ersek return -1; 1435cbb65fc2SLaszlo Ersek } 1436cbb65fc2SLaszlo Ersek 1437e72c3f2eSMichael Roth #endif 1438e72c3f2eSMichael Roth 1439d35d4cb5SMichael Roth #if !defined(CONFIG_FSFREEZE) 1440d35d4cb5SMichael Roth 1441d35d4cb5SMichael Roth GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **err) 1442d35d4cb5SMichael Roth { 1443d35d4cb5SMichael Roth error_set(err, QERR_UNSUPPORTED); 1444d35d4cb5SMichael Roth 1445d35d4cb5SMichael Roth return 0; 1446d35d4cb5SMichael Roth } 1447d35d4cb5SMichael Roth 1448d35d4cb5SMichael Roth int64_t qmp_guest_fsfreeze_freeze(Error **err) 1449d35d4cb5SMichael Roth { 1450d35d4cb5SMichael Roth error_set(err, QERR_UNSUPPORTED); 1451d35d4cb5SMichael Roth 1452d35d4cb5SMichael Roth return 0; 1453d35d4cb5SMichael Roth } 1454d35d4cb5SMichael Roth 1455d35d4cb5SMichael Roth int64_t qmp_guest_fsfreeze_thaw(Error **err) 1456d35d4cb5SMichael Roth { 1457d35d4cb5SMichael Roth error_set(err, QERR_UNSUPPORTED); 1458d35d4cb5SMichael Roth 1459d35d4cb5SMichael Roth return 0; 1460d35d4cb5SMichael Roth } 1461eab5fd59SPaolo Bonzini #endif /* CONFIG_FSFREEZE */ 1462d35d4cb5SMichael Roth 1463eab5fd59SPaolo Bonzini #if !defined(CONFIG_FSTRIM) 1464eab5fd59SPaolo Bonzini void qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **err) 1465eab5fd59SPaolo Bonzini { 1466eab5fd59SPaolo Bonzini error_set(err, QERR_UNSUPPORTED); 1467eab5fd59SPaolo Bonzini } 1468d35d4cb5SMichael Roth #endif 1469d35d4cb5SMichael Roth 1470c216e5adSMichael Roth /* register init/cleanup routines for stateful command groups */ 1471c216e5adSMichael Roth void ga_command_state_init(GAState *s, GACommandState *cs) 1472c216e5adSMichael Roth { 1473c216e5adSMichael Roth #if defined(CONFIG_FSFREEZE) 1474f22d85e9SMichael Roth ga_command_state_add(cs, NULL, guest_fsfreeze_cleanup); 1475c216e5adSMichael Roth #endif 1476c216e5adSMichael Roth ga_command_state_add(cs, guest_file_init, NULL); 1477c216e5adSMichael Roth } 1478