Alexander Ivanov | bad0001 | 2022-10-17 09:28:21 +0200 | [diff] [blame] | 1 | /* |
| 2 | * QEMU Guest Agent BSD-specific command implementations |
| 3 | * |
| 4 | * Copyright (c) Virtuozzo International GmbH. |
| 5 | * |
| 6 | * Authors: |
| 7 | * Alexander Ivanov <alexander.ivanov@virtuozzo.com> |
| 8 | * |
| 9 | * This work is licensed under the terms of the GNU GPL, version 2 or later. |
| 10 | * See the COPYING file in the top-level directory. |
| 11 | */ |
| 12 | |
| 13 | #include "qemu/osdep.h" |
| 14 | #include "qga-qapi-commands.h" |
| 15 | #include "qapi/qmp/qerror.h" |
| 16 | #include "qapi/error.h" |
| 17 | #include "qemu/queue.h" |
| 18 | #include "commands-common.h" |
| 19 | #include <sys/ioctl.h> |
| 20 | #include <sys/param.h> |
| 21 | #include <sys/ucred.h> |
| 22 | #include <sys/mount.h> |
Alexander Ivanov | ffb01cc | 2022-10-17 09:28:25 +0200 | [diff] [blame] | 23 | #include <net/if_dl.h> |
Brad Smith | 28236ad | 2022-11-12 06:40:43 -0500 | [diff] [blame] | 24 | #if defined(__NetBSD__) || defined(__OpenBSD__) |
| 25 | #include <net/if_arp.h> |
| 26 | #include <netinet/if_ether.h> |
| 27 | #else |
Alexander Ivanov | ffb01cc | 2022-10-17 09:28:25 +0200 | [diff] [blame] | 28 | #include <net/ethernet.h> |
Brad Smith | 28236ad | 2022-11-12 06:40:43 -0500 | [diff] [blame] | 29 | #endif |
Alexander Ivanov | bad0001 | 2022-10-17 09:28:21 +0200 | [diff] [blame] | 30 | #include <paths.h> |
| 31 | |
| 32 | #if defined(CONFIG_FSFREEZE) || defined(CONFIG_FSTRIM) |
| 33 | bool build_fs_mount_list(FsMountList *mounts, Error **errp) |
| 34 | { |
| 35 | FsMount *mount; |
| 36 | struct statfs *mntbuf, *mntp; |
| 37 | struct stat statbuf; |
| 38 | int i, count, ret; |
| 39 | |
| 40 | count = getmntinfo(&mntbuf, MNT_NOWAIT); |
| 41 | if (count == 0) { |
| 42 | error_setg_errno(errp, errno, "getmntinfo failed"); |
| 43 | return false; |
| 44 | } |
| 45 | |
| 46 | for (i = 0; i < count; i++) { |
| 47 | mntp = &mntbuf[i]; |
| 48 | ret = stat(mntp->f_mntonname, &statbuf); |
| 49 | if (ret != 0) { |
| 50 | error_setg_errno(errp, errno, "stat failed on %s", |
| 51 | mntp->f_mntonname); |
| 52 | return false; |
| 53 | } |
| 54 | |
| 55 | mount = g_new0(FsMount, 1); |
| 56 | |
| 57 | mount->dirname = g_strdup(mntp->f_mntonname); |
| 58 | mount->devtype = g_strdup(mntp->f_fstypename); |
| 59 | mount->devmajor = major(mount->dev); |
| 60 | mount->devminor = minor(mount->dev); |
| 61 | mount->fsid = mntp->f_fsid; |
| 62 | mount->dev = statbuf.st_dev; |
| 63 | |
| 64 | QTAILQ_INSERT_TAIL(mounts, mount, next); |
| 65 | } |
| 66 | return true; |
| 67 | } |
| 68 | #endif /* CONFIG_FSFREEZE || CONFIG_FSTRIM */ |
| 69 | |
| 70 | #if defined(CONFIG_FSFREEZE) |
| 71 | static int ufssuspend_fd = -1; |
| 72 | static int ufssuspend_cnt; |
| 73 | |
| 74 | int64_t qmp_guest_fsfreeze_do_freeze_list(bool has_mountpoints, |
| 75 | strList *mountpoints, |
| 76 | FsMountList mounts, |
| 77 | Error **errp) |
| 78 | { |
| 79 | int ret; |
| 80 | strList *list; |
| 81 | struct FsMount *mount; |
| 82 | |
| 83 | if (ufssuspend_fd != -1) { |
| 84 | error_setg(errp, "filesystems have already frozen"); |
| 85 | return -1; |
| 86 | } |
| 87 | |
| 88 | ufssuspend_cnt = 0; |
| 89 | ufssuspend_fd = qemu_open(_PATH_UFSSUSPEND, O_RDWR, errp); |
| 90 | if (ufssuspend_fd == -1) { |
| 91 | return -1; |
| 92 | } |
| 93 | |
| 94 | QTAILQ_FOREACH_REVERSE(mount, &mounts, next) { |
| 95 | /* |
| 96 | * To issue fsfreeze in the reverse order of mounts, check if the |
| 97 | * mount is listed in the list here |
| 98 | */ |
| 99 | if (has_mountpoints) { |
| 100 | for (list = mountpoints; list; list = list->next) { |
| 101 | if (g_str_equal(list->value, mount->dirname)) { |
| 102 | break; |
| 103 | } |
| 104 | } |
| 105 | if (!list) { |
| 106 | continue; |
| 107 | } |
| 108 | } |
| 109 | |
| 110 | /* Only UFS supports suspend */ |
| 111 | if (!g_str_equal(mount->devtype, "ufs")) { |
| 112 | continue; |
| 113 | } |
| 114 | |
| 115 | ret = ioctl(ufssuspend_fd, UFSSUSPEND, &mount->fsid); |
| 116 | if (ret == -1) { |
| 117 | /* |
| 118 | * ioctl returns EBUSY for all the FS except the first one |
| 119 | * that was suspended |
| 120 | */ |
| 121 | if (errno == EBUSY) { |
| 122 | continue; |
| 123 | } |
| 124 | error_setg_errno(errp, errno, "failed to freeze %s", |
| 125 | mount->dirname); |
| 126 | goto error; |
| 127 | } |
| 128 | ufssuspend_cnt++; |
| 129 | } |
| 130 | return ufssuspend_cnt; |
| 131 | error: |
| 132 | close(ufssuspend_fd); |
| 133 | ufssuspend_fd = -1; |
| 134 | return -1; |
| 135 | |
| 136 | } |
| 137 | |
| 138 | /* |
| 139 | * We don't need to call UFSRESUME ioctl because all the frozen FS |
| 140 | * are thawed on /dev/ufssuspend closing. |
| 141 | */ |
| 142 | int qmp_guest_fsfreeze_do_thaw(Error **errp) |
| 143 | { |
| 144 | int ret = ufssuspend_cnt; |
| 145 | ufssuspend_cnt = 0; |
| 146 | if (ufssuspend_fd != -1) { |
| 147 | close(ufssuspend_fd); |
| 148 | ufssuspend_fd = -1; |
| 149 | } |
| 150 | return ret; |
| 151 | } |
Alexander Ivanov | bad0001 | 2022-10-17 09:28:21 +0200 | [diff] [blame] | 152 | #endif /* CONFIG_FSFREEZE */ |
Alexander Ivanov | a124109 | 2022-10-17 09:28:24 +0200 | [diff] [blame] | 153 | |
| 154 | #ifdef HAVE_GETIFADDRS |
| 155 | /* |
| 156 | * Fill "buf" with MAC address by ifaddrs. Pointer buf must point to a |
| 157 | * buffer with ETHER_ADDR_LEN length at least. |
| 158 | * |
| 159 | * Returns false in case of an error, otherwise true. "obtained" arguument |
| 160 | * is true if a MAC address was obtained successful, otherwise false. |
| 161 | */ |
| 162 | bool guest_get_hw_addr(struct ifaddrs *ifa, unsigned char *buf, |
| 163 | bool *obtained, Error **errp) |
| 164 | { |
Alexander Ivanov | ffb01cc | 2022-10-17 09:28:25 +0200 | [diff] [blame] | 165 | struct sockaddr_dl *sdp; |
| 166 | |
Alexander Ivanov | a124109 | 2022-10-17 09:28:24 +0200 | [diff] [blame] | 167 | *obtained = false; |
Alexander Ivanov | ffb01cc | 2022-10-17 09:28:25 +0200 | [diff] [blame] | 168 | |
| 169 | if (ifa->ifa_addr->sa_family != AF_LINK) { |
| 170 | /* We can get HW address only for AF_LINK family. */ |
| 171 | g_debug("failed to get MAC address of %s", ifa->ifa_name); |
| 172 | return true; |
| 173 | } |
| 174 | |
| 175 | sdp = (struct sockaddr_dl *)ifa->ifa_addr; |
| 176 | memcpy(buf, sdp->sdl_data + sdp->sdl_nlen, ETHER_ADDR_LEN); |
| 177 | *obtained = true; |
| 178 | |
Alexander Ivanov | a124109 | 2022-10-17 09:28:24 +0200 | [diff] [blame] | 179 | return true; |
| 180 | } |
| 181 | #endif /* HAVE_GETIFADDRS */ |