diff options
author | RajithaY <rajithax.yerrumsetty@intel.com> | 2017-04-25 03:31:15 -0700 |
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committer | Rajitha Yerrumchetty <rajithax.yerrumsetty@intel.com> | 2017-05-22 06:48:08 +0000 |
commit | bb756eebdac6fd24e8919e2c43f7d2c8c4091f59 (patch) | |
tree | ca11e03542edf2d8f631efeca5e1626d211107e3 /qemu/qga/commands-posix.c | |
parent | a14b48d18a9ed03ec191cf16b162206998a895ce (diff) |
Adding qemu as a submodule of KVMFORNFV
This Patch includes the changes to add qemu as a submodule to
kvmfornfv repo and make use of the updated latest qemu for the
execution of all testcase
Change-Id: I1280af507a857675c7f81d30c95255635667bdd7
Signed-off-by:RajithaY<rajithax.yerrumsetty@intel.com>
Diffstat (limited to 'qemu/qga/commands-posix.c')
-rw-r--r-- | qemu/qga/commands-posix.c | 2517 |
1 files changed, 0 insertions, 2517 deletions
diff --git a/qemu/qga/commands-posix.c b/qemu/qga/commands-posix.c deleted file mode 100644 index 2ae37255d..000000000 --- a/qemu/qga/commands-posix.c +++ /dev/null @@ -1,2517 +0,0 @@ -/* - * QEMU Guest Agent POSIX-specific command implementations - * - * Copyright IBM Corp. 2011 - * - * Authors: - * Michael Roth <mdroth@linux.vnet.ibm.com> - * Michal Privoznik <mprivozn@redhat.com> - * - * This work is licensed under the terms of the GNU GPL, version 2 or later. - * See the COPYING file in the top-level directory. - */ - -#include "qemu/osdep.h" -#include <glib.h> -#include <sys/ioctl.h> -#include <sys/wait.h> -#include <dirent.h> -#include "qga/guest-agent-core.h" -#include "qga-qmp-commands.h" -#include "qapi/qmp/qerror.h" -#include "qemu/queue.h" -#include "qemu/host-utils.h" -#include "qemu/sockets.h" -#include "qemu/base64.h" -#include "qemu/cutils.h" - -#ifndef CONFIG_HAS_ENVIRON -#ifdef __APPLE__ -#include <crt_externs.h> -#define environ (*_NSGetEnviron()) -#else -extern char **environ; -#endif -#endif - -#if defined(__linux__) -#include <mntent.h> -#include <linux/fs.h> -#include <ifaddrs.h> -#include <arpa/inet.h> -#include <sys/socket.h> -#include <net/if.h> - -#ifdef FIFREEZE -#define CONFIG_FSFREEZE -#endif -#ifdef FITRIM -#define CONFIG_FSTRIM -#endif -#endif - -static void ga_wait_child(pid_t pid, int *status, Error **errp) -{ - pid_t rpid; - - *status = 0; - - do { - rpid = waitpid(pid, status, 0); - } while (rpid == -1 && errno == EINTR); - - if (rpid == -1) { - error_setg_errno(errp, errno, "failed to wait for child (pid: %d)", - pid); - return; - } - - g_assert(rpid == pid); -} - -void qmp_guest_shutdown(bool has_mode, const char *mode, Error **errp) -{ - const char *shutdown_flag; - Error *local_err = NULL; - pid_t pid; - int status; - - slog("guest-shutdown called, mode: %s", mode); - if (!has_mode || strcmp(mode, "powerdown") == 0) { - shutdown_flag = "-P"; - } else if (strcmp(mode, "halt") == 0) { - shutdown_flag = "-H"; - } else if (strcmp(mode, "reboot") == 0) { - shutdown_flag = "-r"; - } else { - error_setg(errp, - "mode is invalid (valid values are: halt|powerdown|reboot"); - return; - } - - pid = fork(); - if (pid == 0) { - /* child, start the shutdown */ - setsid(); - reopen_fd_to_null(0); - reopen_fd_to_null(1); - reopen_fd_to_null(2); - - execle("/sbin/shutdown", "shutdown", "-h", shutdown_flag, "+0", - "hypervisor initiated shutdown", (char*)NULL, environ); - _exit(EXIT_FAILURE); - } else if (pid < 0) { - error_setg_errno(errp, errno, "failed to create child process"); - return; - } - - ga_wait_child(pid, &status, &local_err); - if (local_err) { - error_propagate(errp, local_err); - return; - } - - if (!WIFEXITED(status)) { - error_setg(errp, "child process has terminated abnormally"); - return; - } - - if (WEXITSTATUS(status)) { - error_setg(errp, "child process has failed to shutdown"); - return; - } - - /* succeeded */ -} - -int64_t qmp_guest_get_time(Error **errp) -{ - int ret; - qemu_timeval tq; - int64_t time_ns; - - ret = qemu_gettimeofday(&tq); - if (ret < 0) { - error_setg_errno(errp, errno, "Failed to get time"); - return -1; - } - - time_ns = tq.tv_sec * 1000000000LL + tq.tv_usec * 1000; - return time_ns; -} - -void qmp_guest_set_time(bool has_time, int64_t time_ns, Error **errp) -{ - int ret; - int status; - pid_t pid; - Error *local_err = NULL; - struct timeval tv; - - /* If user has passed a time, validate and set it. */ - if (has_time) { - GDate date = { 0, }; - - /* year-2038 will overflow in case time_t is 32bit */ - if (time_ns / 1000000000 != (time_t)(time_ns / 1000000000)) { - error_setg(errp, "Time %" PRId64 " is too large", time_ns); - return; - } - - tv.tv_sec = time_ns / 1000000000; - tv.tv_usec = (time_ns % 1000000000) / 1000; - g_date_set_time_t(&date, tv.tv_sec); - if (date.year < 1970 || date.year >= 2070) { - error_setg_errno(errp, errno, "Invalid time"); - return; - } - - ret = settimeofday(&tv, NULL); - if (ret < 0) { - error_setg_errno(errp, errno, "Failed to set time to guest"); - return; - } - } - - /* Now, if user has passed a time to set and the system time is set, we - * just need to synchronize the hardware clock. However, if no time was - * passed, user is requesting the opposite: set the system time from the - * hardware clock (RTC). */ - pid = fork(); - if (pid == 0) { - setsid(); - reopen_fd_to_null(0); - reopen_fd_to_null(1); - reopen_fd_to_null(2); - - /* Use '/sbin/hwclock -w' to set RTC from the system time, - * or '/sbin/hwclock -s' to set the system time from RTC. */ - execle("/sbin/hwclock", "hwclock", has_time ? "-w" : "-s", - NULL, environ); - _exit(EXIT_FAILURE); - } else if (pid < 0) { - error_setg_errno(errp, errno, "failed to create child process"); - return; - } - - ga_wait_child(pid, &status, &local_err); - if (local_err) { - error_propagate(errp, local_err); - return; - } - - if (!WIFEXITED(status)) { - error_setg(errp, "child process has terminated abnormally"); - return; - } - - if (WEXITSTATUS(status)) { - error_setg(errp, "hwclock failed to set hardware clock to system time"); - return; - } -} - -typedef enum { - RW_STATE_NEW, - RW_STATE_READING, - RW_STATE_WRITING, -} RwState; - -typedef struct GuestFileHandle { - uint64_t id; - FILE *fh; - RwState state; - QTAILQ_ENTRY(GuestFileHandle) next; -} GuestFileHandle; - -static struct { - QTAILQ_HEAD(, GuestFileHandle) filehandles; -} guest_file_state = { - .filehandles = QTAILQ_HEAD_INITIALIZER(guest_file_state.filehandles), -}; - -static int64_t guest_file_handle_add(FILE *fh, Error **errp) -{ - GuestFileHandle *gfh; - int64_t handle; - - handle = ga_get_fd_handle(ga_state, errp); - if (handle < 0) { - return -1; - } - - gfh = g_new0(GuestFileHandle, 1); - gfh->id = handle; - gfh->fh = fh; - QTAILQ_INSERT_TAIL(&guest_file_state.filehandles, gfh, next); - - return handle; -} - -static GuestFileHandle *guest_file_handle_find(int64_t id, Error **errp) -{ - GuestFileHandle *gfh; - - QTAILQ_FOREACH(gfh, &guest_file_state.filehandles, next) - { - if (gfh->id == id) { - return gfh; - } - } - - error_setg(errp, "handle '%" PRId64 "' has not been found", id); - return NULL; -} - -typedef const char * const ccpc; - -#ifndef O_BINARY -#define O_BINARY 0 -#endif - -/* http://pubs.opengroup.org/onlinepubs/9699919799/functions/fopen.html */ -static const struct { - ccpc *forms; - int oflag_base; -} guest_file_open_modes[] = { - { (ccpc[]){ "r", NULL }, O_RDONLY }, - { (ccpc[]){ "rb", NULL }, O_RDONLY | O_BINARY }, - { (ccpc[]){ "w", NULL }, O_WRONLY | O_CREAT | O_TRUNC }, - { (ccpc[]){ "wb", NULL }, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY }, - { (ccpc[]){ "a", NULL }, O_WRONLY | O_CREAT | O_APPEND }, - { (ccpc[]){ "ab", NULL }, O_WRONLY | O_CREAT | O_APPEND | O_BINARY }, - { (ccpc[]){ "r+", NULL }, O_RDWR }, - { (ccpc[]){ "rb+", "r+b", NULL }, O_RDWR | O_BINARY }, - { (ccpc[]){ "w+", NULL }, O_RDWR | O_CREAT | O_TRUNC }, - { (ccpc[]){ "wb+", "w+b", NULL }, O_RDWR | O_CREAT | O_TRUNC | O_BINARY }, - { (ccpc[]){ "a+", NULL }, O_RDWR | O_CREAT | O_APPEND }, - { (ccpc[]){ "ab+", "a+b", NULL }, O_RDWR | O_CREAT | O_APPEND | O_BINARY } -}; - -static int -find_open_flag(const char *mode_str, Error **errp) -{ - unsigned mode; - - for (mode = 0; mode < ARRAY_SIZE(guest_file_open_modes); ++mode) { - ccpc *form; - - form = guest_file_open_modes[mode].forms; - while (*form != NULL && strcmp(*form, mode_str) != 0) { - ++form; - } - if (*form != NULL) { - break; - } - } - - if (mode == ARRAY_SIZE(guest_file_open_modes)) { - error_setg(errp, "invalid file open mode '%s'", mode_str); - return -1; - } - return guest_file_open_modes[mode].oflag_base | O_NOCTTY | O_NONBLOCK; -} - -#define DEFAULT_NEW_FILE_MODE (S_IRUSR | S_IWUSR | \ - S_IRGRP | S_IWGRP | \ - S_IROTH | S_IWOTH) - -static FILE * -safe_open_or_create(const char *path, const char *mode, Error **errp) -{ - Error *local_err = NULL; - int oflag; - - oflag = find_open_flag(mode, &local_err); - if (local_err == NULL) { - int fd; - - /* If the caller wants / allows creation of a new file, we implement it - * with a two step process: open() + (open() / fchmod()). - * - * First we insist on creating the file exclusively as a new file. If - * that succeeds, we're free to set any file-mode bits on it. (The - * motivation is that we want to set those file-mode bits independently - * of the current umask.) - * - * If the exclusive creation fails because the file already exists - * (EEXIST is not possible for any other reason), we just attempt to - * open the file, but in this case we won't be allowed to change the - * file-mode bits on the preexistent file. - * - * The pathname should never disappear between the two open()s in - * practice. If it happens, then someone very likely tried to race us. - * In this case just go ahead and report the ENOENT from the second - * open() to the caller. - * - * If the caller wants to open a preexistent file, then the first - * open() is decisive and its third argument is ignored, and the second - * open() and the fchmod() are never called. - */ - fd = open(path, oflag | ((oflag & O_CREAT) ? O_EXCL : 0), 0); - if (fd == -1 && errno == EEXIST) { - oflag &= ~(unsigned)O_CREAT; - fd = open(path, oflag); - } - - if (fd == -1) { - error_setg_errno(&local_err, errno, "failed to open file '%s' " - "(mode: '%s')", path, mode); - } else { - qemu_set_cloexec(fd); - - if ((oflag & O_CREAT) && fchmod(fd, DEFAULT_NEW_FILE_MODE) == -1) { - error_setg_errno(&local_err, errno, "failed to set permission " - "0%03o on new file '%s' (mode: '%s')", - (unsigned)DEFAULT_NEW_FILE_MODE, path, mode); - } else { - FILE *f; - - f = fdopen(fd, mode); - if (f == NULL) { - error_setg_errno(&local_err, errno, "failed to associate " - "stdio stream with file descriptor %d, " - "file '%s' (mode: '%s')", fd, path, mode); - } else { - return f; - } - } - - close(fd); - if (oflag & O_CREAT) { - unlink(path); - } - } - } - - error_propagate(errp, local_err); - return NULL; -} - -int64_t qmp_guest_file_open(const char *path, bool has_mode, const char *mode, - Error **errp) -{ - FILE *fh; - Error *local_err = NULL; - int64_t handle; - - if (!has_mode) { - mode = "r"; - } - slog("guest-file-open called, filepath: %s, mode: %s", path, mode); - fh = safe_open_or_create(path, mode, &local_err); - if (local_err != NULL) { - error_propagate(errp, local_err); - return -1; - } - - /* set fd non-blocking to avoid common use cases (like reading from a - * named pipe) from hanging the agent - */ - qemu_set_nonblock(fileno(fh)); - - handle = guest_file_handle_add(fh, errp); - if (handle < 0) { - fclose(fh); - return -1; - } - - slog("guest-file-open, handle: %" PRId64, handle); - return handle; -} - -void qmp_guest_file_close(int64_t handle, Error **errp) -{ - GuestFileHandle *gfh = guest_file_handle_find(handle, errp); - int ret; - - slog("guest-file-close called, handle: %" PRId64, handle); - if (!gfh) { - return; - } - - ret = fclose(gfh->fh); - if (ret == EOF) { - error_setg_errno(errp, errno, "failed to close handle"); - return; - } - - QTAILQ_REMOVE(&guest_file_state.filehandles, gfh, next); - g_free(gfh); -} - -struct GuestFileRead *qmp_guest_file_read(int64_t handle, bool has_count, - int64_t count, Error **errp) -{ - GuestFileHandle *gfh = guest_file_handle_find(handle, errp); - GuestFileRead *read_data = NULL; - guchar *buf; - FILE *fh; - size_t read_count; - - if (!gfh) { - return NULL; - } - - if (!has_count) { - count = QGA_READ_COUNT_DEFAULT; - } else if (count < 0) { - error_setg(errp, "value '%" PRId64 "' is invalid for argument count", - count); - return NULL; - } - - fh = gfh->fh; - - /* explicitly flush when switching from writing to reading */ - if (gfh->state == RW_STATE_WRITING) { - int ret = fflush(fh); - if (ret == EOF) { - error_setg_errno(errp, errno, "failed to flush file"); - return NULL; - } - gfh->state = RW_STATE_NEW; - } - - buf = g_malloc0(count+1); - read_count = fread(buf, 1, count, fh); - if (ferror(fh)) { - error_setg_errno(errp, errno, "failed to read file"); - slog("guest-file-read failed, handle: %" PRId64, handle); - } else { - buf[read_count] = 0; - read_data = g_new0(GuestFileRead, 1); - read_data->count = read_count; - read_data->eof = feof(fh); - if (read_count) { - read_data->buf_b64 = g_base64_encode(buf, read_count); - } - gfh->state = RW_STATE_READING; - } - g_free(buf); - clearerr(fh); - - return read_data; -} - -GuestFileWrite *qmp_guest_file_write(int64_t handle, const char *buf_b64, - bool has_count, int64_t count, - Error **errp) -{ - GuestFileWrite *write_data = NULL; - guchar *buf; - gsize buf_len; - int write_count; - GuestFileHandle *gfh = guest_file_handle_find(handle, errp); - FILE *fh; - - if (!gfh) { - return NULL; - } - - fh = gfh->fh; - - if (gfh->state == RW_STATE_READING) { - int ret = fseek(fh, 0, SEEK_CUR); - if (ret == -1) { - error_setg_errno(errp, errno, "failed to seek file"); - return NULL; - } - gfh->state = RW_STATE_NEW; - } - - buf = qbase64_decode(buf_b64, -1, &buf_len, errp); - if (!buf) { - return NULL; - } - - if (!has_count) { - count = buf_len; - } else if (count < 0 || count > buf_len) { - error_setg(errp, "value '%" PRId64 "' is invalid for argument count", - count); - g_free(buf); - return NULL; - } - - write_count = fwrite(buf, 1, count, fh); - if (ferror(fh)) { - error_setg_errno(errp, errno, "failed to write to file"); - slog("guest-file-write failed, handle: %" PRId64, handle); - } else { - write_data = g_new0(GuestFileWrite, 1); - write_data->count = write_count; - write_data->eof = feof(fh); - gfh->state = RW_STATE_WRITING; - } - g_free(buf); - clearerr(fh); - - return write_data; -} - -struct GuestFileSeek *qmp_guest_file_seek(int64_t handle, int64_t offset, - GuestFileWhence *whence_code, - Error **errp) -{ - GuestFileHandle *gfh = guest_file_handle_find(handle, errp); - GuestFileSeek *seek_data = NULL; - FILE *fh; - int ret; - int whence; - Error *err = NULL; - - if (!gfh) { - return NULL; - } - - /* We stupidly exposed 'whence':'int' in our qapi */ - whence = ga_parse_whence(whence_code, &err); - if (err) { - error_propagate(errp, err); - return NULL; - } - - fh = gfh->fh; - ret = fseek(fh, offset, whence); - if (ret == -1) { - error_setg_errno(errp, errno, "failed to seek file"); - if (errno == ESPIPE) { - /* file is non-seekable, stdio shouldn't be buffering anyways */ - gfh->state = RW_STATE_NEW; - } - } else { - seek_data = g_new0(GuestFileSeek, 1); - seek_data->position = ftell(fh); - seek_data->eof = feof(fh); - gfh->state = RW_STATE_NEW; - } - clearerr(fh); - - return seek_data; -} - -void qmp_guest_file_flush(int64_t handle, Error **errp) -{ - GuestFileHandle *gfh = guest_file_handle_find(handle, errp); - FILE *fh; - int ret; - - if (!gfh) { - return; - } - - fh = gfh->fh; - ret = fflush(fh); - if (ret == EOF) { - error_setg_errno(errp, errno, "failed to flush file"); - } else { - gfh->state = RW_STATE_NEW; - } -} - -/* linux-specific implementations. avoid this if at all possible. */ -#if defined(__linux__) - -#if defined(CONFIG_FSFREEZE) || defined(CONFIG_FSTRIM) -typedef struct FsMount { - char *dirname; - char *devtype; - unsigned int devmajor, devminor; - QTAILQ_ENTRY(FsMount) next; -} FsMount; - -typedef QTAILQ_HEAD(FsMountList, FsMount) FsMountList; - -static void free_fs_mount_list(FsMountList *mounts) -{ - FsMount *mount, *temp; - - if (!mounts) { - return; - } - - QTAILQ_FOREACH_SAFE(mount, mounts, next, temp) { - QTAILQ_REMOVE(mounts, mount, next); - g_free(mount->dirname); - g_free(mount->devtype); - g_free(mount); - } -} - -static int dev_major_minor(const char *devpath, - unsigned int *devmajor, unsigned int *devminor) -{ - struct stat st; - - *devmajor = 0; - *devminor = 0; - - if (stat(devpath, &st) < 0) { - slog("failed to stat device file '%s': %s", devpath, strerror(errno)); - return -1; - } - if (S_ISDIR(st.st_mode)) { - /* It is bind mount */ - return -2; - } - if (S_ISBLK(st.st_mode)) { - *devmajor = major(st.st_rdev); - *devminor = minor(st.st_rdev); - return 0; - } - return -1; -} - -/* - * Walk the mount table and build a list of local file systems - */ -static void build_fs_mount_list_from_mtab(FsMountList *mounts, Error **errp) -{ - struct mntent *ment; - FsMount *mount; - char const *mtab = "/proc/self/mounts"; - FILE *fp; - unsigned int devmajor, devminor; - - fp = setmntent(mtab, "r"); - if (!fp) { - error_setg(errp, "failed to open mtab file: '%s'", mtab); - return; - } - - while ((ment = getmntent(fp))) { - /* - * An entry which device name doesn't start with a '/' is - * either a dummy file system or a network file system. - * Add special handling for smbfs and cifs as is done by - * coreutils as well. - */ - if ((ment->mnt_fsname[0] != '/') || - (strcmp(ment->mnt_type, "smbfs") == 0) || - (strcmp(ment->mnt_type, "cifs") == 0)) { - continue; - } - if (dev_major_minor(ment->mnt_fsname, &devmajor, &devminor) == -2) { - /* Skip bind mounts */ - continue; - } - - mount = g_new0(FsMount, 1); - mount->dirname = g_strdup(ment->mnt_dir); - mount->devtype = g_strdup(ment->mnt_type); - mount->devmajor = devmajor; - mount->devminor = devminor; - - QTAILQ_INSERT_TAIL(mounts, mount, next); - } - - endmntent(fp); -} - -static void decode_mntname(char *name, int len) -{ - int i, j = 0; - for (i = 0; i <= len; i++) { - if (name[i] != '\\') { - name[j++] = name[i]; - } else if (name[i + 1] == '\\') { - name[j++] = '\\'; - i++; - } else if (name[i + 1] >= '0' && name[i + 1] <= '3' && - name[i + 2] >= '0' && name[i + 2] <= '7' && - name[i + 3] >= '0' && name[i + 3] <= '7') { - name[j++] = (name[i + 1] - '0') * 64 + - (name[i + 2] - '0') * 8 + - (name[i + 3] - '0'); - i += 3; - } else { - name[j++] = name[i]; - } - } -} - -static void build_fs_mount_list(FsMountList *mounts, Error **errp) -{ - FsMount *mount; - char const *mountinfo = "/proc/self/mountinfo"; - FILE *fp; - char *line = NULL, *dash; - size_t n; - char check; - unsigned int devmajor, devminor; - int ret, dir_s, dir_e, type_s, type_e, dev_s, dev_e; - - fp = fopen(mountinfo, "r"); - if (!fp) { - build_fs_mount_list_from_mtab(mounts, errp); - return; - } - - while (getline(&line, &n, fp) != -1) { - ret = sscanf(line, "%*u %*u %u:%u %*s %n%*s%n%c", - &devmajor, &devminor, &dir_s, &dir_e, &check); - if (ret < 3) { - continue; - } - dash = strstr(line + dir_e, " - "); - if (!dash) { - continue; - } - ret = sscanf(dash, " - %n%*s%n %n%*s%n%c", - &type_s, &type_e, &dev_s, &dev_e, &check); - if (ret < 1) { - continue; - } - line[dir_e] = 0; - dash[type_e] = 0; - dash[dev_e] = 0; - decode_mntname(line + dir_s, dir_e - dir_s); - decode_mntname(dash + dev_s, dev_e - dev_s); - if (devmajor == 0) { - /* btrfs reports major number = 0 */ - if (strcmp("btrfs", dash + type_s) != 0 || - dev_major_minor(dash + dev_s, &devmajor, &devminor) < 0) { - continue; - } - } - - mount = g_new0(FsMount, 1); - mount->dirname = g_strdup(line + dir_s); - mount->devtype = g_strdup(dash + type_s); - mount->devmajor = devmajor; - mount->devminor = devminor; - - QTAILQ_INSERT_TAIL(mounts, mount, next); - } - free(line); - - fclose(fp); -} -#endif - -#if defined(CONFIG_FSFREEZE) - -static char *get_pci_driver(char const *syspath, int pathlen, Error **errp) -{ - char *path; - char *dpath; - char *driver = NULL; - char buf[PATH_MAX]; - ssize_t len; - - path = g_strndup(syspath, pathlen); - dpath = g_strdup_printf("%s/driver", path); - len = readlink(dpath, buf, sizeof(buf) - 1); - if (len != -1) { - buf[len] = 0; - driver = g_strdup(basename(buf)); - } - g_free(dpath); - g_free(path); - return driver; -} - -static int compare_uint(const void *_a, const void *_b) -{ - unsigned int a = *(unsigned int *)_a; - unsigned int b = *(unsigned int *)_b; - - return a < b ? -1 : a > b ? 1 : 0; -} - -/* Walk the specified sysfs and build a sorted list of host or ata numbers */ -static int build_hosts(char const *syspath, char const *host, bool ata, - unsigned int *hosts, int hosts_max, Error **errp) -{ - char *path; - DIR *dir; - struct dirent *entry; - int i = 0; - - path = g_strndup(syspath, host - syspath); - dir = opendir(path); - if (!dir) { - error_setg_errno(errp, errno, "opendir(\"%s\")", path); - g_free(path); - return -1; - } - - while (i < hosts_max) { - entry = readdir(dir); - if (!entry) { - break; - } - if (ata && sscanf(entry->d_name, "ata%d", hosts + i) == 1) { - ++i; - } else if (!ata && sscanf(entry->d_name, "host%d", hosts + i) == 1) { - ++i; - } - } - - qsort(hosts, i, sizeof(hosts[0]), compare_uint); - - g_free(path); - closedir(dir); - return i; -} - -/* Store disk device info specified by @sysfs into @fs */ -static void build_guest_fsinfo_for_real_device(char const *syspath, - GuestFilesystemInfo *fs, - Error **errp) -{ - unsigned int pci[4], host, hosts[8], tgt[3]; - int i, nhosts = 0, pcilen; - GuestDiskAddress *disk; - GuestPCIAddress *pciaddr; - GuestDiskAddressList *list = NULL; - bool has_ata = false, has_host = false, has_tgt = false; - char *p, *q, *driver = NULL; - - p = strstr(syspath, "/devices/pci"); - if (!p || sscanf(p + 12, "%*x:%*x/%x:%x:%x.%x%n", - pci, pci + 1, pci + 2, pci + 3, &pcilen) < 4) { - g_debug("only pci device is supported: sysfs path \"%s\"", syspath); - return; - } - - driver = get_pci_driver(syspath, (p + 12 + pcilen) - syspath, errp); - if (!driver) { - goto cleanup; - } - - p = strstr(syspath, "/target"); - if (p && sscanf(p + 7, "%*u:%*u:%*u/%*u:%u:%u:%u", - tgt, tgt + 1, tgt + 2) == 3) { - has_tgt = true; - } - - p = strstr(syspath, "/ata"); - if (p) { - q = p + 4; - has_ata = true; - } else { - p = strstr(syspath, "/host"); - q = p + 5; - } - if (p && sscanf(q, "%u", &host) == 1) { - has_host = true; - nhosts = build_hosts(syspath, p, has_ata, hosts, - sizeof(hosts) / sizeof(hosts[0]), errp); - if (nhosts < 0) { - goto cleanup; - } - } - - pciaddr = g_malloc0(sizeof(*pciaddr)); - pciaddr->domain = pci[0]; - pciaddr->bus = pci[1]; - pciaddr->slot = pci[2]; - pciaddr->function = pci[3]; - - disk = g_malloc0(sizeof(*disk)); - disk->pci_controller = pciaddr; - - list = g_malloc0(sizeof(*list)); - list->value = disk; - - if (strcmp(driver, "ata_piix") == 0) { - /* a host per ide bus, target*:0:<unit>:0 */ - if (!has_host || !has_tgt) { - g_debug("invalid sysfs path '%s' (driver '%s')", syspath, driver); - goto cleanup; - } - for (i = 0; i < nhosts; i++) { - if (host == hosts[i]) { - disk->bus_type = GUEST_DISK_BUS_TYPE_IDE; - disk->bus = i; - disk->unit = tgt[1]; - break; - } - } - if (i >= nhosts) { - g_debug("no host for '%s' (driver '%s')", syspath, driver); - goto cleanup; - } - } else if (strcmp(driver, "sym53c8xx") == 0) { - /* scsi(LSI Logic): target*:0:<unit>:0 */ - if (!has_tgt) { - g_debug("invalid sysfs path '%s' (driver '%s')", syspath, driver); - goto cleanup; - } - disk->bus_type = GUEST_DISK_BUS_TYPE_SCSI; - disk->unit = tgt[1]; - } else if (strcmp(driver, "virtio-pci") == 0) { - if (has_tgt) { - /* virtio-scsi: target*:0:0:<unit> */ - disk->bus_type = GUEST_DISK_BUS_TYPE_SCSI; - disk->unit = tgt[2]; - } else { - /* virtio-blk: 1 disk per 1 device */ - disk->bus_type = GUEST_DISK_BUS_TYPE_VIRTIO; - } - } else if (strcmp(driver, "ahci") == 0) { - /* ahci: 1 host per 1 unit */ - if (!has_host || !has_tgt) { - g_debug("invalid sysfs path '%s' (driver '%s')", syspath, driver); - goto cleanup; - } - for (i = 0; i < nhosts; i++) { - if (host == hosts[i]) { - disk->unit = i; - disk->bus_type = GUEST_DISK_BUS_TYPE_SATA; - break; - } - } - if (i >= nhosts) { - g_debug("no host for '%s' (driver '%s')", syspath, driver); - goto cleanup; - } - } else { - g_debug("unknown driver '%s' (sysfs path '%s')", driver, syspath); - goto cleanup; - } - - list->next = fs->disk; - fs->disk = list; - g_free(driver); - return; - -cleanup: - if (list) { - qapi_free_GuestDiskAddressList(list); - } - g_free(driver); -} - -static void build_guest_fsinfo_for_device(char const *devpath, - GuestFilesystemInfo *fs, - Error **errp); - -/* Store a list of slave devices of virtual volume specified by @syspath into - * @fs */ -static void build_guest_fsinfo_for_virtual_device(char const *syspath, - GuestFilesystemInfo *fs, - Error **errp) -{ - DIR *dir; - char *dirpath; - struct dirent *entry; - - dirpath = g_strdup_printf("%s/slaves", syspath); - dir = opendir(dirpath); - if (!dir) { - error_setg_errno(errp, errno, "opendir(\"%s\")", dirpath); - g_free(dirpath); - return; - } - - for (;;) { - errno = 0; - entry = readdir(dir); - if (entry == NULL) { - if (errno) { - error_setg_errno(errp, errno, "readdir(\"%s\")", dirpath); - } - break; - } - - if (entry->d_type == DT_LNK) { - char *path; - - g_debug(" slave device '%s'", entry->d_name); - path = g_strdup_printf("%s/slaves/%s", syspath, entry->d_name); - build_guest_fsinfo_for_device(path, fs, errp); - g_free(path); - - if (*errp) { - break; - } - } - } - - g_free(dirpath); - closedir(dir); -} - -/* Dispatch to functions for virtual/real device */ -static void build_guest_fsinfo_for_device(char const *devpath, - GuestFilesystemInfo *fs, - Error **errp) -{ - char *syspath = realpath(devpath, NULL); - - if (!syspath) { - error_setg_errno(errp, errno, "realpath(\"%s\")", devpath); - return; - } - - if (!fs->name) { - fs->name = g_strdup(basename(syspath)); - } - - g_debug(" parse sysfs path '%s'", syspath); - - if (strstr(syspath, "/devices/virtual/block/")) { - build_guest_fsinfo_for_virtual_device(syspath, fs, errp); - } else { - build_guest_fsinfo_for_real_device(syspath, fs, errp); - } - - free(syspath); -} - -/* Return a list of the disk device(s)' info which @mount lies on */ -static GuestFilesystemInfo *build_guest_fsinfo(struct FsMount *mount, - Error **errp) -{ - GuestFilesystemInfo *fs = g_malloc0(sizeof(*fs)); - char *devpath = g_strdup_printf("/sys/dev/block/%u:%u", - mount->devmajor, mount->devminor); - - fs->mountpoint = g_strdup(mount->dirname); - fs->type = g_strdup(mount->devtype); - build_guest_fsinfo_for_device(devpath, fs, errp); - - g_free(devpath); - return fs; -} - -GuestFilesystemInfoList *qmp_guest_get_fsinfo(Error **errp) -{ - FsMountList mounts; - struct FsMount *mount; - GuestFilesystemInfoList *new, *ret = NULL; - Error *local_err = NULL; - - QTAILQ_INIT(&mounts); - build_fs_mount_list(&mounts, &local_err); - if (local_err) { - error_propagate(errp, local_err); - return NULL; - } - - QTAILQ_FOREACH(mount, &mounts, next) { - g_debug("Building guest fsinfo for '%s'", mount->dirname); - - new = g_malloc0(sizeof(*ret)); - new->value = build_guest_fsinfo(mount, &local_err); - new->next = ret; - ret = new; - if (local_err) { - error_propagate(errp, local_err); - qapi_free_GuestFilesystemInfoList(ret); - ret = NULL; - break; - } - } - - free_fs_mount_list(&mounts); - return ret; -} - - -typedef enum { - FSFREEZE_HOOK_THAW = 0, - FSFREEZE_HOOK_FREEZE, -} FsfreezeHookArg; - -static const char *fsfreeze_hook_arg_string[] = { - "thaw", - "freeze", -}; - -static void execute_fsfreeze_hook(FsfreezeHookArg arg, Error **errp) -{ - int status; - pid_t pid; - const char *hook; - const char *arg_str = fsfreeze_hook_arg_string[arg]; - Error *local_err = NULL; - - hook = ga_fsfreeze_hook(ga_state); - if (!hook) { - return; - } - if (access(hook, X_OK) != 0) { - error_setg_errno(errp, errno, "can't access fsfreeze hook '%s'", hook); - return; - } - - slog("executing fsfreeze hook with arg '%s'", arg_str); - pid = fork(); - if (pid == 0) { - setsid(); - reopen_fd_to_null(0); - reopen_fd_to_null(1); - reopen_fd_to_null(2); - - execle(hook, hook, arg_str, NULL, environ); - _exit(EXIT_FAILURE); - } else if (pid < 0) { - error_setg_errno(errp, errno, "failed to create child process"); - return; - } - - ga_wait_child(pid, &status, &local_err); - if (local_err) { - error_propagate(errp, local_err); - return; - } - - if (!WIFEXITED(status)) { - error_setg(errp, "fsfreeze hook has terminated abnormally"); - return; - } - - status = WEXITSTATUS(status); - if (status) { - error_setg(errp, "fsfreeze hook has failed with status %d", status); - return; - } -} - -/* - * Return status of freeze/thaw - */ -GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **errp) -{ - if (ga_is_frozen(ga_state)) { - return GUEST_FSFREEZE_STATUS_FROZEN; - } - - return GUEST_FSFREEZE_STATUS_THAWED; -} - -int64_t qmp_guest_fsfreeze_freeze(Error **errp) -{ - return qmp_guest_fsfreeze_freeze_list(false, NULL, errp); -} - -/* - * Walk list of mounted file systems in the guest, and freeze the ones which - * are real local file systems. - */ -int64_t qmp_guest_fsfreeze_freeze_list(bool has_mountpoints, - strList *mountpoints, - Error **errp) -{ - int ret = 0, i = 0; - strList *list; - FsMountList mounts; - struct FsMount *mount; - Error *local_err = NULL; - int fd; - - slog("guest-fsfreeze called"); - - execute_fsfreeze_hook(FSFREEZE_HOOK_FREEZE, &local_err); - if (local_err) { - error_propagate(errp, local_err); - return -1; - } - - QTAILQ_INIT(&mounts); - build_fs_mount_list(&mounts, &local_err); - if (local_err) { - error_propagate(errp, local_err); - return -1; - } - - /* cannot risk guest agent blocking itself on a write in this state */ - ga_set_frozen(ga_state); - - QTAILQ_FOREACH_REVERSE(mount, &mounts, FsMountList, next) { - /* To issue fsfreeze in the reverse order of mounts, check if the - * mount is listed in the list here */ - if (has_mountpoints) { - for (list = mountpoints; list; list = list->next) { - if (strcmp(list->value, mount->dirname) == 0) { - break; - } - } - if (!list) { - continue; - } - } - - fd = qemu_open(mount->dirname, O_RDONLY); - if (fd == -1) { - error_setg_errno(errp, errno, "failed to open %s", mount->dirname); - goto error; - } - - /* we try to cull filesytems we know won't work in advance, but other - * filesytems may not implement fsfreeze for less obvious reasons. - * these will report EOPNOTSUPP. we simply ignore these when tallying - * the number of frozen filesystems. - * - * any other error means a failure to freeze a filesystem we - * expect to be freezable, so return an error in those cases - * and return system to thawed state. - */ - ret = ioctl(fd, FIFREEZE); - if (ret == -1) { - if (errno != EOPNOTSUPP) { - error_setg_errno(errp, errno, "failed to freeze %s", - mount->dirname); - close(fd); - goto error; - } - } else { - i++; - } - close(fd); - } - - free_fs_mount_list(&mounts); - return i; - -error: - free_fs_mount_list(&mounts); - qmp_guest_fsfreeze_thaw(NULL); - return 0; -} - -/* - * Walk list of frozen file systems in the guest, and thaw them. - */ -int64_t qmp_guest_fsfreeze_thaw(Error **errp) -{ - int ret; - FsMountList mounts; - FsMount *mount; - int fd, i = 0, logged; - Error *local_err = NULL; - - QTAILQ_INIT(&mounts); - build_fs_mount_list(&mounts, &local_err); - if (local_err) { - error_propagate(errp, local_err); - return 0; - } - - QTAILQ_FOREACH(mount, &mounts, next) { - logged = false; - fd = qemu_open(mount->dirname, O_RDONLY); - if (fd == -1) { - continue; - } - /* we have no way of knowing whether a filesystem was actually unfrozen - * as a result of a successful call to FITHAW, only that if an error - * was returned the filesystem was *not* unfrozen by that particular - * call. - * - * since multiple preceding FIFREEZEs require multiple calls to FITHAW - * to unfreeze, continuing issuing FITHAW until an error is returned, - * in which case either the filesystem is in an unfreezable state, or, - * more likely, it was thawed previously (and remains so afterward). - * - * also, since the most recent successful call is the one that did - * the actual unfreeze, we can use this to provide an accurate count - * of the number of filesystems unfrozen by guest-fsfreeze-thaw, which - * may * be useful for determining whether a filesystem was unfrozen - * during the freeze/thaw phase by a process other than qemu-ga. - */ - do { - ret = ioctl(fd, FITHAW); - if (ret == 0 && !logged) { - i++; - logged = true; - } - } while (ret == 0); - close(fd); - } - - ga_unset_frozen(ga_state); - free_fs_mount_list(&mounts); - - execute_fsfreeze_hook(FSFREEZE_HOOK_THAW, errp); - - return i; -} - -static void guest_fsfreeze_cleanup(void) -{ - Error *err = NULL; - - if (ga_is_frozen(ga_state) == GUEST_FSFREEZE_STATUS_FROZEN) { - qmp_guest_fsfreeze_thaw(&err); - if (err) { - slog("failed to clean up frozen filesystems: %s", - error_get_pretty(err)); - error_free(err); - } - } -} -#endif /* CONFIG_FSFREEZE */ - -#if defined(CONFIG_FSTRIM) -/* - * Walk list of mounted file systems in the guest, and trim them. - */ -GuestFilesystemTrimResponse * -qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **errp) -{ - GuestFilesystemTrimResponse *response; - GuestFilesystemTrimResultList *list; - GuestFilesystemTrimResult *result; - int ret = 0; - FsMountList mounts; - struct FsMount *mount; - int fd; - Error *local_err = NULL; - struct fstrim_range r; - - slog("guest-fstrim called"); - - QTAILQ_INIT(&mounts); - build_fs_mount_list(&mounts, &local_err); - if (local_err) { - error_propagate(errp, local_err); - return NULL; - } - - response = g_malloc0(sizeof(*response)); - - QTAILQ_FOREACH(mount, &mounts, next) { - result = g_malloc0(sizeof(*result)); - result->path = g_strdup(mount->dirname); - - list = g_malloc0(sizeof(*list)); - list->value = result; - list->next = response->paths; - response->paths = list; - - fd = qemu_open(mount->dirname, O_RDONLY); - if (fd == -1) { - result->error = g_strdup_printf("failed to open: %s", - strerror(errno)); - result->has_error = true; - continue; - } - - /* We try to cull filesytems we know won't work in advance, but other - * filesytems may not implement fstrim for less obvious reasons. These - * will report EOPNOTSUPP; while in some other cases ENOTTY will be - * reported (e.g. CD-ROMs). - * Any other error means an unexpected error. - */ - r.start = 0; - r.len = -1; - r.minlen = has_minimum ? minimum : 0; - ret = ioctl(fd, FITRIM, &r); - if (ret == -1) { - result->has_error = true; - if (errno == ENOTTY || errno == EOPNOTSUPP) { - result->error = g_strdup("trim not supported"); - } else { - result->error = g_strdup_printf("failed to trim: %s", - strerror(errno)); - } - close(fd); - continue; - } - - result->has_minimum = true; - result->minimum = r.minlen; - result->has_trimmed = true; - result->trimmed = r.len; - close(fd); - } - - free_fs_mount_list(&mounts); - return response; -} -#endif /* CONFIG_FSTRIM */ - - -#define LINUX_SYS_STATE_FILE "/sys/power/state" -#define SUSPEND_SUPPORTED 0 -#define SUSPEND_NOT_SUPPORTED 1 - -static void bios_supports_mode(const char *pmutils_bin, const char *pmutils_arg, - const char *sysfile_str, Error **errp) -{ - Error *local_err = NULL; - char *pmutils_path; - pid_t pid; - int status; - - pmutils_path = g_find_program_in_path(pmutils_bin); - - pid = fork(); - if (!pid) { - char buf[32]; /* hopefully big enough */ - ssize_t ret; - int fd; - - setsid(); - reopen_fd_to_null(0); - reopen_fd_to_null(1); - reopen_fd_to_null(2); - - if (pmutils_path) { - execle(pmutils_path, pmutils_bin, pmutils_arg, NULL, environ); - } - - /* - * If we get here either pm-utils is not installed or execle() has - * failed. Let's try the manual method if the caller wants it. - */ - - if (!sysfile_str) { - _exit(SUSPEND_NOT_SUPPORTED); - } - - fd = open(LINUX_SYS_STATE_FILE, O_RDONLY); - if (fd < 0) { - _exit(SUSPEND_NOT_SUPPORTED); - } - - ret = read(fd, buf, sizeof(buf)-1); - if (ret <= 0) { - _exit(SUSPEND_NOT_SUPPORTED); - } - buf[ret] = '\0'; - - if (strstr(buf, sysfile_str)) { - _exit(SUSPEND_SUPPORTED); - } - - _exit(SUSPEND_NOT_SUPPORTED); - } else if (pid < 0) { - error_setg_errno(errp, errno, "failed to create child process"); - goto out; - } - - ga_wait_child(pid, &status, &local_err); - if (local_err) { - error_propagate(errp, local_err); - goto out; - } - - if (!WIFEXITED(status)) { - error_setg(errp, "child process has terminated abnormally"); - goto out; - } - - switch (WEXITSTATUS(status)) { - case SUSPEND_SUPPORTED: - goto out; - case SUSPEND_NOT_SUPPORTED: - error_setg(errp, - "the requested suspend mode is not supported by the guest"); - goto out; - default: - error_setg(errp, - "the helper program '%s' returned an unexpected exit status" - " code (%d)", pmutils_path, WEXITSTATUS(status)); - goto out; - } - -out: - g_free(pmutils_path); -} - -static void guest_suspend(const char *pmutils_bin, const char *sysfile_str, - Error **errp) -{ - Error *local_err = NULL; - char *pmutils_path; - pid_t pid; - int status; - - pmutils_path = g_find_program_in_path(pmutils_bin); - - pid = fork(); - if (pid == 0) { - /* child */ - int fd; - - setsid(); - reopen_fd_to_null(0); - reopen_fd_to_null(1); - reopen_fd_to_null(2); - - if (pmutils_path) { - execle(pmutils_path, pmutils_bin, NULL, environ); - } - - /* - * If we get here either pm-utils is not installed or execle() has - * failed. Let's try the manual method if the caller wants it. - */ - - if (!sysfile_str) { - _exit(EXIT_FAILURE); - } - - fd = open(LINUX_SYS_STATE_FILE, O_WRONLY); - if (fd < 0) { - _exit(EXIT_FAILURE); - } - - if (write(fd, sysfile_str, strlen(sysfile_str)) < 0) { - _exit(EXIT_FAILURE); - } - - _exit(EXIT_SUCCESS); - } else if (pid < 0) { - error_setg_errno(errp, errno, "failed to create child process"); - goto out; - } - - ga_wait_child(pid, &status, &local_err); - if (local_err) { - error_propagate(errp, local_err); - goto out; - } - - if (!WIFEXITED(status)) { - error_setg(errp, "child process has terminated abnormally"); - goto out; - } - - if (WEXITSTATUS(status)) { - error_setg(errp, "child process has failed to suspend"); - goto out; - } - -out: - g_free(pmutils_path); -} - -void qmp_guest_suspend_disk(Error **errp) -{ - Error *local_err = NULL; - - bios_supports_mode("pm-is-supported", "--hibernate", "disk", &local_err); - if (local_err) { - error_propagate(errp, local_err); - return; - } - - guest_suspend("pm-hibernate", "disk", errp); -} - -void qmp_guest_suspend_ram(Error **errp) -{ - Error *local_err = NULL; - - bios_supports_mode("pm-is-supported", "--suspend", "mem", &local_err); - if (local_err) { - error_propagate(errp, local_err); - return; - } - - guest_suspend("pm-suspend", "mem", errp); -} - -void qmp_guest_suspend_hybrid(Error **errp) -{ - Error *local_err = NULL; - - bios_supports_mode("pm-is-supported", "--suspend-hybrid", NULL, - &local_err); - if (local_err) { - error_propagate(errp, local_err); - return; - } - - guest_suspend("pm-suspend-hybrid", NULL, errp); -} - -static GuestNetworkInterfaceList * -guest_find_interface(GuestNetworkInterfaceList *head, - const char *name) -{ - for (; head; head = head->next) { - if (strcmp(head->value->name, name) == 0) { - break; - } - } - - return head; -} - -/* - * Build information about guest interfaces - */ -GuestNetworkInterfaceList *qmp_guest_network_get_interfaces(Error **errp) -{ - GuestNetworkInterfaceList *head = NULL, *cur_item = NULL; - struct ifaddrs *ifap, *ifa; - - if (getifaddrs(&ifap) < 0) { - error_setg_errno(errp, errno, "getifaddrs failed"); - goto error; - } - - for (ifa = ifap; ifa; ifa = ifa->ifa_next) { - GuestNetworkInterfaceList *info; - GuestIpAddressList **address_list = NULL, *address_item = NULL; - char addr4[INET_ADDRSTRLEN]; - char addr6[INET6_ADDRSTRLEN]; - int sock; - struct ifreq ifr; - unsigned char *mac_addr; - void *p; - - g_debug("Processing %s interface", ifa->ifa_name); - - info = guest_find_interface(head, ifa->ifa_name); - - if (!info) { - info = g_malloc0(sizeof(*info)); - info->value = g_malloc0(sizeof(*info->value)); - info->value->name = g_strdup(ifa->ifa_name); - - if (!cur_item) { - head = cur_item = info; - } else { - cur_item->next = info; - cur_item = info; - } - } - - if (!info->value->has_hardware_address && - ifa->ifa_flags & SIOCGIFHWADDR) { - /* we haven't obtained HW address yet */ - sock = socket(PF_INET, SOCK_STREAM, 0); - if (sock == -1) { - error_setg_errno(errp, errno, "failed to create socket"); - goto error; - } - - memset(&ifr, 0, sizeof(ifr)); - pstrcpy(ifr.ifr_name, IF_NAMESIZE, info->value->name); - if (ioctl(sock, SIOCGIFHWADDR, &ifr) == -1) { - error_setg_errno(errp, errno, - "failed to get MAC address of %s", - ifa->ifa_name); - close(sock); - goto error; - } - - close(sock); - mac_addr = (unsigned char *) &ifr.ifr_hwaddr.sa_data; - - info->value->hardware_address = - g_strdup_printf("%02x:%02x:%02x:%02x:%02x:%02x", - (int) mac_addr[0], (int) mac_addr[1], - (int) mac_addr[2], (int) mac_addr[3], - (int) mac_addr[4], (int) mac_addr[5]); - - info->value->has_hardware_address = true; - } - - if (ifa->ifa_addr && - ifa->ifa_addr->sa_family == AF_INET) { - /* interface with IPv4 address */ - p = &((struct sockaddr_in *)ifa->ifa_addr)->sin_addr; - if (!inet_ntop(AF_INET, p, addr4, sizeof(addr4))) { - error_setg_errno(errp, errno, "inet_ntop failed"); - goto error; - } - - address_item = g_malloc0(sizeof(*address_item)); - address_item->value = g_malloc0(sizeof(*address_item->value)); - address_item->value->ip_address = g_strdup(addr4); - address_item->value->ip_address_type = GUEST_IP_ADDRESS_TYPE_IPV4; - - if (ifa->ifa_netmask) { - /* Count the number of set bits in netmask. - * This is safe as '1' and '0' cannot be shuffled in netmask. */ - p = &((struct sockaddr_in *)ifa->ifa_netmask)->sin_addr; - address_item->value->prefix = ctpop32(((uint32_t *) p)[0]); - } - } else if (ifa->ifa_addr && - ifa->ifa_addr->sa_family == AF_INET6) { - /* interface with IPv6 address */ - p = &((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr; - if (!inet_ntop(AF_INET6, p, addr6, sizeof(addr6))) { - error_setg_errno(errp, errno, "inet_ntop failed"); - goto error; - } - - address_item = g_malloc0(sizeof(*address_item)); - address_item->value = g_malloc0(sizeof(*address_item->value)); - address_item->value->ip_address = g_strdup(addr6); - address_item->value->ip_address_type = GUEST_IP_ADDRESS_TYPE_IPV6; - - if (ifa->ifa_netmask) { - /* Count the number of set bits in netmask. - * This is safe as '1' and '0' cannot be shuffled in netmask. */ - p = &((struct sockaddr_in6 *)ifa->ifa_netmask)->sin6_addr; - address_item->value->prefix = - ctpop32(((uint32_t *) p)[0]) + - ctpop32(((uint32_t *) p)[1]) + - ctpop32(((uint32_t *) p)[2]) + - ctpop32(((uint32_t *) p)[3]); - } - } - - if (!address_item) { - continue; - } - - address_list = &info->value->ip_addresses; - - while (*address_list && (*address_list)->next) { - address_list = &(*address_list)->next; - } - - if (!*address_list) { - *address_list = address_item; - } else { - (*address_list)->next = address_item; - } - - info->value->has_ip_addresses = true; - - - } - - freeifaddrs(ifap); - return head; - -error: - freeifaddrs(ifap); - qapi_free_GuestNetworkInterfaceList(head); - return NULL; -} - -#define SYSCONF_EXACT(name, errp) sysconf_exact((name), #name, (errp)) - -static long sysconf_exact(int name, const char *name_str, Error **errp) -{ - long ret; - - errno = 0; - ret = sysconf(name); - if (ret == -1) { - if (errno == 0) { - error_setg(errp, "sysconf(%s): value indefinite", name_str); - } else { - error_setg_errno(errp, errno, "sysconf(%s)", name_str); - } - } - return ret; -} - -/* Transfer online/offline status between @vcpu and the guest system. - * - * On input either @errp or *@errp must be NULL. - * - * In system-to-@vcpu direction, the following @vcpu fields are accessed: - * - R: vcpu->logical_id - * - W: vcpu->online - * - W: vcpu->can_offline - * - * In @vcpu-to-system direction, the following @vcpu fields are accessed: - * - R: vcpu->logical_id - * - R: vcpu->online - * - * Written members remain unmodified on error. - */ -static void transfer_vcpu(GuestLogicalProcessor *vcpu, bool sys2vcpu, - Error **errp) -{ - char *dirpath; - int dirfd; - - dirpath = g_strdup_printf("/sys/devices/system/cpu/cpu%" PRId64 "/", - vcpu->logical_id); - dirfd = open(dirpath, O_RDONLY | O_DIRECTORY); - if (dirfd == -1) { - error_setg_errno(errp, errno, "open(\"%s\")", dirpath); - } else { - static const char fn[] = "online"; - int fd; - int res; - - fd = openat(dirfd, fn, sys2vcpu ? O_RDONLY : O_RDWR); - if (fd == -1) { - if (errno != ENOENT) { - error_setg_errno(errp, errno, "open(\"%s/%s\")", dirpath, fn); - } else if (sys2vcpu) { - vcpu->online = true; - vcpu->can_offline = false; - } else if (!vcpu->online) { - error_setg(errp, "logical processor #%" PRId64 " can't be " - "offlined", vcpu->logical_id); - } /* otherwise pretend successful re-onlining */ - } else { - unsigned char status; - - res = pread(fd, &status, 1, 0); - if (res == -1) { - error_setg_errno(errp, errno, "pread(\"%s/%s\")", dirpath, fn); - } else if (res == 0) { - error_setg(errp, "pread(\"%s/%s\"): unexpected EOF", dirpath, - fn); - } else if (sys2vcpu) { - vcpu->online = (status != '0'); - vcpu->can_offline = true; - } else if (vcpu->online != (status != '0')) { - status = '0' + vcpu->online; - if (pwrite(fd, &status, 1, 0) == -1) { - error_setg_errno(errp, errno, "pwrite(\"%s/%s\")", dirpath, - fn); - } - } /* otherwise pretend successful re-(on|off)-lining */ - - res = close(fd); - g_assert(res == 0); - } - - res = close(dirfd); - g_assert(res == 0); - } - - g_free(dirpath); -} - -GuestLogicalProcessorList *qmp_guest_get_vcpus(Error **errp) -{ - int64_t current; - GuestLogicalProcessorList *head, **link; - long sc_max; - Error *local_err = NULL; - - current = 0; - head = NULL; - link = &head; - sc_max = SYSCONF_EXACT(_SC_NPROCESSORS_CONF, &local_err); - - while (local_err == NULL && current < sc_max) { - GuestLogicalProcessor *vcpu; - GuestLogicalProcessorList *entry; - - vcpu = g_malloc0(sizeof *vcpu); - vcpu->logical_id = current++; - vcpu->has_can_offline = true; /* lolspeak ftw */ - transfer_vcpu(vcpu, true, &local_err); - - entry = g_malloc0(sizeof *entry); - entry->value = vcpu; - - *link = entry; - link = &entry->next; - } - - if (local_err == NULL) { - /* there's no guest with zero VCPUs */ - g_assert(head != NULL); - return head; - } - - qapi_free_GuestLogicalProcessorList(head); - error_propagate(errp, local_err); - return NULL; -} - -int64_t qmp_guest_set_vcpus(GuestLogicalProcessorList *vcpus, Error **errp) -{ - int64_t processed; - Error *local_err = NULL; - - processed = 0; - while (vcpus != NULL) { - transfer_vcpu(vcpus->value, false, &local_err); - if (local_err != NULL) { - break; - } - ++processed; - vcpus = vcpus->next; - } - - if (local_err != NULL) { - if (processed == 0) { - error_propagate(errp, local_err); - } else { - error_free(local_err); - } - } - - return processed; -} - -void qmp_guest_set_user_password(const char *username, - const char *password, - bool crypted, - Error **errp) -{ - Error *local_err = NULL; - char *passwd_path = NULL; - pid_t pid; - int status; - int datafd[2] = { -1, -1 }; - char *rawpasswddata = NULL; - size_t rawpasswdlen; - char *chpasswddata = NULL; - size_t chpasswdlen; - - rawpasswddata = (char *)qbase64_decode(password, -1, &rawpasswdlen, errp); - if (!rawpasswddata) { - return; - } - rawpasswddata = g_renew(char, rawpasswddata, rawpasswdlen + 1); - rawpasswddata[rawpasswdlen] = '\0'; - - if (strchr(rawpasswddata, '\n')) { - error_setg(errp, "forbidden characters in raw password"); - goto out; - } - - if (strchr(username, '\n') || - strchr(username, ':')) { - error_setg(errp, "forbidden characters in username"); - goto out; - } - - chpasswddata = g_strdup_printf("%s:%s\n", username, rawpasswddata); - chpasswdlen = strlen(chpasswddata); - - passwd_path = g_find_program_in_path("chpasswd"); - - if (!passwd_path) { - error_setg(errp, "cannot find 'passwd' program in PATH"); - goto out; - } - - if (pipe(datafd) < 0) { - error_setg(errp, "cannot create pipe FDs"); - goto out; - } - - pid = fork(); - if (pid == 0) { - close(datafd[1]); - /* child */ - setsid(); - dup2(datafd[0], 0); - reopen_fd_to_null(1); - reopen_fd_to_null(2); - - if (crypted) { - execle(passwd_path, "chpasswd", "-e", NULL, environ); - } else { - execle(passwd_path, "chpasswd", NULL, environ); - } - _exit(EXIT_FAILURE); - } else if (pid < 0) { - error_setg_errno(errp, errno, "failed to create child process"); - goto out; - } - close(datafd[0]); - datafd[0] = -1; - - if (qemu_write_full(datafd[1], chpasswddata, chpasswdlen) != chpasswdlen) { - error_setg_errno(errp, errno, "cannot write new account password"); - goto out; - } - close(datafd[1]); - datafd[1] = -1; - - ga_wait_child(pid, &status, &local_err); - if (local_err) { - error_propagate(errp, local_err); - goto out; - } - - if (!WIFEXITED(status)) { - error_setg(errp, "child process has terminated abnormally"); - goto out; - } - - if (WEXITSTATUS(status)) { - error_setg(errp, "child process has failed to set user password"); - goto out; - } - -out: - g_free(chpasswddata); - g_free(rawpasswddata); - g_free(passwd_path); - if (datafd[0] != -1) { - close(datafd[0]); - } - if (datafd[1] != -1) { - close(datafd[1]); - } -} - -static void ga_read_sysfs_file(int dirfd, const char *pathname, char *buf, - int size, Error **errp) -{ - int fd; - int res; - - errno = 0; - fd = openat(dirfd, pathname, O_RDONLY); - if (fd == -1) { - error_setg_errno(errp, errno, "open sysfs file \"%s\"", pathname); - return; - } - - res = pread(fd, buf, size, 0); - if (res == -1) { - error_setg_errno(errp, errno, "pread sysfs file \"%s\"", pathname); - } else if (res == 0) { - error_setg(errp, "pread sysfs file \"%s\": unexpected EOF", pathname); - } - close(fd); -} - -static void ga_write_sysfs_file(int dirfd, const char *pathname, - const char *buf, int size, Error **errp) -{ - int fd; - - errno = 0; - fd = openat(dirfd, pathname, O_WRONLY); - if (fd == -1) { - error_setg_errno(errp, errno, "open sysfs file \"%s\"", pathname); - return; - } - - if (pwrite(fd, buf, size, 0) == -1) { - error_setg_errno(errp, errno, "pwrite sysfs file \"%s\"", pathname); - } - - close(fd); -} - -/* Transfer online/offline status between @mem_blk and the guest system. - * - * On input either @errp or *@errp must be NULL. - * - * In system-to-@mem_blk direction, the following @mem_blk fields are accessed: - * - R: mem_blk->phys_index - * - W: mem_blk->online - * - W: mem_blk->can_offline - * - * In @mem_blk-to-system direction, the following @mem_blk fields are accessed: - * - R: mem_blk->phys_index - * - R: mem_blk->online - *- R: mem_blk->can_offline - * Written members remain unmodified on error. - */ -static void transfer_memory_block(GuestMemoryBlock *mem_blk, bool sys2memblk, - GuestMemoryBlockResponse *result, - Error **errp) -{ - char *dirpath; - int dirfd; - char *status; - Error *local_err = NULL; - - if (!sys2memblk) { - DIR *dp; - - if (!result) { - error_setg(errp, "Internal error, 'result' should not be NULL"); - return; - } - errno = 0; - dp = opendir("/sys/devices/system/memory/"); - /* if there is no 'memory' directory in sysfs, - * we think this VM does not support online/offline memory block, - * any other solution? - */ - if (!dp && errno == ENOENT) { - result->response = - GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_NOT_SUPPORTED; - goto out1; - } - closedir(dp); - } - - dirpath = g_strdup_printf("/sys/devices/system/memory/memory%" PRId64 "/", - mem_blk->phys_index); - dirfd = open(dirpath, O_RDONLY | O_DIRECTORY); - if (dirfd == -1) { - if (sys2memblk) { - error_setg_errno(errp, errno, "open(\"%s\")", dirpath); - } else { - if (errno == ENOENT) { - result->response = GUEST_MEMORY_BLOCK_RESPONSE_TYPE_NOT_FOUND; - } else { - result->response = - GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_FAILED; - } - } - g_free(dirpath); - goto out1; - } - g_free(dirpath); - - status = g_malloc0(10); - ga_read_sysfs_file(dirfd, "state", status, 10, &local_err); - if (local_err) { - /* treat with sysfs file that not exist in old kernel */ - if (errno == ENOENT) { - error_free(local_err); - if (sys2memblk) { - mem_blk->online = true; - mem_blk->can_offline = false; - } else if (!mem_blk->online) { - result->response = - GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_NOT_SUPPORTED; - } - } else { - if (sys2memblk) { - error_propagate(errp, local_err); - } else { - result->response = - GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_FAILED; - } - } - goto out2; - } - - if (sys2memblk) { - char removable = '0'; - - mem_blk->online = (strncmp(status, "online", 6) == 0); - - ga_read_sysfs_file(dirfd, "removable", &removable, 1, &local_err); - if (local_err) { - /* if no 'removable' file, it doesn't support offline mem blk */ - if (errno == ENOENT) { - error_free(local_err); - mem_blk->can_offline = false; - } else { - error_propagate(errp, local_err); - } - } else { - mem_blk->can_offline = (removable != '0'); - } - } else { - if (mem_blk->online != (strncmp(status, "online", 6) == 0)) { - char *new_state = mem_blk->online ? g_strdup("online") : - g_strdup("offline"); - - ga_write_sysfs_file(dirfd, "state", new_state, strlen(new_state), - &local_err); - g_free(new_state); - if (local_err) { - error_free(local_err); - result->response = - GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_FAILED; - goto out2; - } - - result->response = GUEST_MEMORY_BLOCK_RESPONSE_TYPE_SUCCESS; - result->has_error_code = false; - } /* otherwise pretend successful re-(on|off)-lining */ - } - g_free(status); - close(dirfd); - return; - -out2: - g_free(status); - close(dirfd); -out1: - if (!sys2memblk) { - result->has_error_code = true; - result->error_code = errno; - } -} - -GuestMemoryBlockList *qmp_guest_get_memory_blocks(Error **errp) -{ - GuestMemoryBlockList *head, **link; - Error *local_err = NULL; - struct dirent *de; - DIR *dp; - - head = NULL; - link = &head; - - dp = opendir("/sys/devices/system/memory/"); - if (!dp) { - /* it's ok if this happens to be a system that doesn't expose - * memory blocks via sysfs, but otherwise we should report - * an error - */ - if (errno != ENOENT) { - error_setg_errno(errp, errno, "Can't open directory" - "\"/sys/devices/system/memory/\""); - } - return NULL; - } - - /* Note: the phys_index of memory block may be discontinuous, - * this is because a memblk is the unit of the Sparse Memory design, which - * allows discontinuous memory ranges (ex. NUMA), so here we should - * traverse the memory block directory. - */ - while ((de = readdir(dp)) != NULL) { - GuestMemoryBlock *mem_blk; - GuestMemoryBlockList *entry; - - if ((strncmp(de->d_name, "memory", 6) != 0) || - !(de->d_type & DT_DIR)) { - continue; - } - - mem_blk = g_malloc0(sizeof *mem_blk); - /* The d_name is "memoryXXX", phys_index is block id, same as XXX */ - mem_blk->phys_index = strtoul(&de->d_name[6], NULL, 10); - mem_blk->has_can_offline = true; /* lolspeak ftw */ - transfer_memory_block(mem_blk, true, NULL, &local_err); - - entry = g_malloc0(sizeof *entry); - entry->value = mem_blk; - - *link = entry; - link = &entry->next; - } - - closedir(dp); - if (local_err == NULL) { - /* there's no guest with zero memory blocks */ - if (head == NULL) { - error_setg(errp, "guest reported zero memory blocks!"); - } - return head; - } - - qapi_free_GuestMemoryBlockList(head); - error_propagate(errp, local_err); - return NULL; -} - -GuestMemoryBlockResponseList * -qmp_guest_set_memory_blocks(GuestMemoryBlockList *mem_blks, Error **errp) -{ - GuestMemoryBlockResponseList *head, **link; - Error *local_err = NULL; - - head = NULL; - link = &head; - - while (mem_blks != NULL) { - GuestMemoryBlockResponse *result; - GuestMemoryBlockResponseList *entry; - GuestMemoryBlock *current_mem_blk = mem_blks->value; - - result = g_malloc0(sizeof(*result)); - result->phys_index = current_mem_blk->phys_index; - transfer_memory_block(current_mem_blk, false, result, &local_err); - if (local_err) { /* should never happen */ - goto err; - } - entry = g_malloc0(sizeof *entry); - entry->value = result; - - *link = entry; - link = &entry->next; - mem_blks = mem_blks->next; - } - - return head; -err: - qapi_free_GuestMemoryBlockResponseList(head); - error_propagate(errp, local_err); - return NULL; -} - -GuestMemoryBlockInfo *qmp_guest_get_memory_block_info(Error **errp) -{ - Error *local_err = NULL; - char *dirpath; - int dirfd; - char *buf; - GuestMemoryBlockInfo *info; - - dirpath = g_strdup_printf("/sys/devices/system/memory/"); - dirfd = open(dirpath, O_RDONLY | O_DIRECTORY); - if (dirfd == -1) { - error_setg_errno(errp, errno, "open(\"%s\")", dirpath); - g_free(dirpath); - return NULL; - } - g_free(dirpath); - - buf = g_malloc0(20); - ga_read_sysfs_file(dirfd, "block_size_bytes", buf, 20, &local_err); - close(dirfd); - if (local_err) { - g_free(buf); - error_propagate(errp, local_err); - return NULL; - } - - info = g_new0(GuestMemoryBlockInfo, 1); - info->size = strtol(buf, NULL, 16); /* the unit is bytes */ - - g_free(buf); - - return info; -} - -#else /* defined(__linux__) */ - -void qmp_guest_suspend_disk(Error **errp) -{ - error_setg(errp, QERR_UNSUPPORTED); -} - -void qmp_guest_suspend_ram(Error **errp) -{ - error_setg(errp, QERR_UNSUPPORTED); -} - -void qmp_guest_suspend_hybrid(Error **errp) -{ - error_setg(errp, QERR_UNSUPPORTED); -} - -GuestNetworkInterfaceList *qmp_guest_network_get_interfaces(Error **errp) -{ - error_setg(errp, QERR_UNSUPPORTED); - return NULL; -} - -GuestLogicalProcessorList *qmp_guest_get_vcpus(Error **errp) -{ - error_setg(errp, QERR_UNSUPPORTED); - return NULL; -} - -int64_t qmp_guest_set_vcpus(GuestLogicalProcessorList *vcpus, Error **errp) -{ - error_setg(errp, QERR_UNSUPPORTED); - return -1; -} - -void qmp_guest_set_user_password(const char *username, - const char *password, - bool crypted, - Error **errp) -{ - error_setg(errp, QERR_UNSUPPORTED); -} - -GuestMemoryBlockList *qmp_guest_get_memory_blocks(Error **errp) -{ - error_setg(errp, QERR_UNSUPPORTED); - return NULL; -} - -GuestMemoryBlockResponseList * -qmp_guest_set_memory_blocks(GuestMemoryBlockList *mem_blks, Error **errp) -{ - error_setg(errp, QERR_UNSUPPORTED); - return NULL; -} - -GuestMemoryBlockInfo *qmp_guest_get_memory_block_info(Error **errp) -{ - error_setg(errp, QERR_UNSUPPORTED); - return NULL; -} - -#endif - -#if !defined(CONFIG_FSFREEZE) - -GuestFilesystemInfoList *qmp_guest_get_fsinfo(Error **errp) -{ - error_setg(errp, QERR_UNSUPPORTED); - return NULL; -} - -GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **errp) -{ - error_setg(errp, QERR_UNSUPPORTED); - - return 0; -} - -int64_t qmp_guest_fsfreeze_freeze(Error **errp) -{ - error_setg(errp, QERR_UNSUPPORTED); - - return 0; -} - -int64_t qmp_guest_fsfreeze_freeze_list(bool has_mountpoints, - strList *mountpoints, - Error **errp) -{ - error_setg(errp, QERR_UNSUPPORTED); - - return 0; -} - -int64_t qmp_guest_fsfreeze_thaw(Error **errp) -{ - error_setg(errp, QERR_UNSUPPORTED); - - return 0; -} -#endif /* CONFIG_FSFREEZE */ - -#if !defined(CONFIG_FSTRIM) -GuestFilesystemTrimResponse * -qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **errp) -{ - error_setg(errp, QERR_UNSUPPORTED); - return NULL; -} -#endif - -/* add unsupported commands to the blacklist */ -GList *ga_command_blacklist_init(GList *blacklist) -{ -#if !defined(__linux__) - { - const char *list[] = { - "guest-suspend-disk", "guest-suspend-ram", - "guest-suspend-hybrid", "guest-network-get-interfaces", - "guest-get-vcpus", "guest-set-vcpus", - "guest-get-memory-blocks", "guest-set-memory-blocks", - "guest-get-memory-block-size", NULL}; - char **p = (char **)list; - - while (*p) { - blacklist = g_list_append(blacklist, g_strdup(*p++)); - } - } -#endif - -#if !defined(CONFIG_FSFREEZE) - { - const char *list[] = { - "guest-get-fsinfo", "guest-fsfreeze-status", - "guest-fsfreeze-freeze", "guest-fsfreeze-freeze-list", - "guest-fsfreeze-thaw", "guest-get-fsinfo", NULL}; - char **p = (char **)list; - - while (*p) { - blacklist = g_list_append(blacklist, g_strdup(*p++)); - } - } -#endif - -#if !defined(CONFIG_FSTRIM) - blacklist = g_list_append(blacklist, g_strdup("guest-fstrim")); -#endif - - return blacklist; -} - -/* register init/cleanup routines for stateful command groups */ -void ga_command_state_init(GAState *s, GACommandState *cs) -{ -#if defined(CONFIG_FSFREEZE) - ga_command_state_add(cs, NULL, guest_fsfreeze_cleanup); -#endif -} |