X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=src%2Fnspawn%2Fnspawn.c;h=0466ddbff3ebae0f1b0569da607f8adbf93d27e9;hb=2822da4fb7f891e5320f02f1d00f64b72221ced4;hp=e3e3dfe20e594d62a0e708da4886df23de683736;hpb=56f64d95763a799ba4475daf44d8e9f72a1bd474;p=elogind.git diff --git a/src/nspawn/nspawn.c b/src/nspawn/nspawn.c index e3e3dfe20..0466ddbff 100644 --- a/src/nspawn/nspawn.c +++ b/src/nspawn/nspawn.c @@ -90,6 +90,7 @@ #include "base-filesystem.h" #include "barrier.h" #include "event-util.h" +#include "cap-list.h" #ifdef HAVE_SECCOMP #include "seccomp-util.h" @@ -401,7 +402,6 @@ static int parse_argv(int argc, char *argv[]) { FOREACH_WORD_SEPARATOR(word, length, optarg, ",", state) { _cleanup_free_ char *t; - cap_value_t cap; t = strndup(word, length); if (!t) @@ -413,7 +413,10 @@ static int parse_argv(int argc, char *argv[]) { else minus = (uint64_t) -1; } else { - if (cap_from_name(t, &cap) < 0) { + int cap; + + cap = capability_from_name(t); + if (cap < 0) { log_error("Failed to parse capability %s.", t); return -EINVAL; } @@ -738,10 +741,8 @@ static int mount_binds(const char *dest, char **l, bool ro) { struct stat source_st, dest_st; int r; - if (stat(*x, &source_st) < 0) { - log_error_errno(errno, "Failed to stat %s: %m", *x); - return -errno; - } + if (stat(*x, &source_st) < 0) + return log_error_errno(errno, "Failed to stat %s: %m", *x); where = strappend(dest, *y); if (!where) @@ -770,18 +771,12 @@ static int mount_binds(const char *dest, char **l, bool ro) { return log_error_errno(r, "Failed to create mount point %s: %m", where); } else if (S_ISFIFO(source_st.st_mode)) { r = mkfifo(where, 0644); - if (r < 0 && errno != EEXIST) { - log_error_errno(errno, "Failed to create mount point %s: %m", where); - - return -errno; - } + if (r < 0 && errno != EEXIST) + return log_error_errno(errno, "Failed to create mount point %s: %m", where); } else if (S_ISSOCK(source_st.st_mode)) { r = mknod(where, 0644 | S_IFSOCK, 0); - if (r < 0 && errno != EEXIST) { - log_error_errno(errno, "Failed to create mount point %s: %m", where); - - return -errno; - } + if (r < 0 && errno != EEXIST) + return log_error_errno(errno, "Failed to create mount point %s: %m", where); } else if (S_ISREG(source_st.st_mode)) { r = touch(where); if (r < 0) @@ -791,10 +786,8 @@ static int mount_binds(const char *dest, char **l, bool ro) { return -ENOTSUP; } - if (mount(*x, where, "bind", MS_BIND, NULL) < 0) { - log_error_errno(errno, "mount(%s) failed: %m", where); - return -errno; - } + if (mount(*x, where, "bind", MS_BIND, NULL) < 0) + return log_error_errno(errno, "mount(%s) failed: %m", where); if (ro) { r = bind_remount_recursive(where, true); @@ -818,13 +811,11 @@ static int mount_tmpfs(const char *dest) { return log_oom(); r = mkdir_label(where, 0755); - if (r < 0 && errno != EEXIST) - return log_error_errno(r, "creating mount point for tmpfs %s failed: %m", where); + if (r < 0 && r != -EEXIST) + return log_error_errno(r, "Creating mount point for tmpfs %s failed: %m", where); - if (mount("tmpfs", where, "tmpfs", MS_NODEV|MS_STRICTATIME, *o) < 0) { - log_error_errno(errno, "tmpfs mount to %s failed: %m", where); - return -errno; - } + if (mount("tmpfs", where, "tmpfs", MS_NODEV|MS_STRICTATIME, *o) < 0) + return log_error_errno(errno, "tmpfs mount to %s failed: %m", where); } return 0; @@ -953,15 +944,11 @@ static int setup_volatile_state(const char *directory) { p = strappenda(directory, "/var"); r = mkdir(p, 0755); - if (r < 0 && errno != EEXIST) { - log_error_errno(errno, "Failed to create %s: %m", directory); - return -errno; - } + if (r < 0 && errno != EEXIST) + return log_error_errno(errno, "Failed to create %s: %m", directory); - if (mount("tmpfs", p, "tmpfs", MS_STRICTATIME, "mode=755") < 0) { - log_error_errno(errno, "Failed to mount tmpfs to /var: %m"); - return -errno; - } + if (mount("tmpfs", p, "tmpfs", MS_STRICTATIME, "mode=755") < 0) + return log_error_errno(errno, "Failed to mount tmpfs to /var: %m"); return 0; } @@ -980,10 +967,8 @@ static int setup_volatile(const char *directory) { /* --volatile=yes means we mount a tmpfs to the root dir, and the original /usr to use inside it, and that read-only. */ - if (!mkdtemp(template)) { - log_error_errno(errno, "Failed to create temporary directory: %m"); - return -errno; - } + if (!mkdtemp(template)) + return log_error_errno(errno, "Failed to create temporary directory: %m"); if (mount("tmpfs", template, "tmpfs", MS_STRICTATIME, "mode=755") < 0) { log_error_errno(errno, "Failed to mount tmpfs for root directory: %m"); @@ -1114,10 +1099,8 @@ static int copy_devnodes(const char *dest) { if (stat(from, &st) < 0) { - if (errno != ENOENT) { - log_error_errno(errno, "Failed to stat %s: %m", from); - return -errno; - } + if (errno != ENOENT) + return log_error_errno(errno, "Failed to stat %s: %m", from); } else if (!S_ISCHR(st.st_mode) && !S_ISBLK(st.st_mode)) { @@ -1131,10 +1114,8 @@ static int copy_devnodes(const char *dest) { return -r; } - if (mknod(to, st.st_mode, st.st_rdev) < 0) { - log_error_errno(errno, "mknod(%s) failed: %m", dest); - return -errno; - } + if (mknod(to, st.st_mode, st.st_rdev) < 0) + return log_error_errno(errno, "mknod(%s) failed: %m", dest); } } @@ -1148,10 +1129,8 @@ static int setup_ptmx(const char *dest) { if (!p) return log_oom(); - if (symlink("pts/ptmx", p) < 0) { - log_error_errno(errno, "Failed to create /dev/ptmx symlink: %m"); - return -errno; - } + if (symlink("pts/ptmx", p) < 0) + return log_error_errno(errno, "Failed to create /dev/ptmx symlink: %m"); return 0; } @@ -1167,10 +1146,8 @@ static int setup_dev_console(const char *dest, const char *console) { u = umask(0000); - if (stat("/dev/null", &st) < 0) { - log_error_errno(errno, "Failed to stat /dev/null: %m"); - return -errno; - } + if (stat("/dev/null", &st) < 0) + return log_error_errno(errno, "Failed to stat /dev/null: %m"); r = chmod_and_chown(console, 0600, 0, 0); if (r < 0) @@ -1185,15 +1162,11 @@ static int setup_dev_console(const char *dest, const char *console) { * matter here, since we mount it over anyway). */ to = strappenda(dest, "/dev/console"); - if (mknod(to, (st.st_mode & ~07777) | 0600, st.st_rdev) < 0) { - log_error_errno(errno, "mknod() for /dev/console failed: %m"); - return -errno; - } + if (mknod(to, (st.st_mode & ~07777) | 0600, st.st_rdev) < 0) + return log_error_errno(errno, "mknod() for /dev/console failed: %m"); - if (mount(console, to, "bind", MS_BIND, NULL) < 0) { - log_error_errno(errno, "Bind mount for /dev/console failed: %m"); - return -errno; - } + if (mount(console, to, "bind", MS_BIND, NULL) < 0) + return log_error_errno(errno, "Bind mount for /dev/console failed: %m"); return 0; } @@ -1228,25 +1201,19 @@ static int setup_kmsg(const char *dest, int kmsg_socket) { asprintf(&to, "%s/proc/kmsg", dest) < 0) return log_oom(); - if (mkfifo(from, 0600) < 0) { - log_error_errno(errno, "mkfifo() for /dev/kmsg failed: %m"); - return -errno; - } + if (mkfifo(from, 0600) < 0) + return log_error_errno(errno, "mkfifo() for /dev/kmsg failed: %m"); r = chmod_and_chown(from, 0600, 0, 0); if (r < 0) return log_error_errno(r, "Failed to correct access mode for /dev/kmsg: %m"); - if (mount(from, to, "bind", MS_BIND, NULL) < 0) { - log_error_errno(errno, "Bind mount for /proc/kmsg failed: %m"); - return -errno; - } + if (mount(from, to, "bind", MS_BIND, NULL) < 0) + return log_error_errno(errno, "Bind mount for /proc/kmsg failed: %m"); fd = open(from, O_RDWR|O_NDELAY|O_CLOEXEC); - if (fd < 0) { - log_error_errno(errno, "Failed to open fifo: %m"); - return -errno; - } + if (fd < 0) + return log_error_errno(errno, "Failed to open fifo: %m"); cmsg = CMSG_FIRSTHDR(&mh); cmsg->cmsg_level = SOL_SOCKET; @@ -1261,10 +1228,8 @@ static int setup_kmsg(const char *dest, int kmsg_socket) { k = sendmsg(kmsg_socket, &mh, MSG_DONTWAIT|MSG_NOSIGNAL); safe_close(fd); - if (k < 0) { - log_error_errno(errno, "Failed to send FIFO fd: %m"); - return -errno; - } + if (k < 0) + return log_error_errno(errno, "Failed to send FIFO fd: %m"); /* And now make the FIFO unavailable as /dev/kmsg... */ unlink(from); @@ -1359,10 +1324,8 @@ static int setup_journal(const char *directory) { return 0; } - if (unlink(p) < 0) { - log_error_errno(errno, "Failed to remove symlink %s: %m", p); - return -errno; - } + if (unlink(p) < 0) + return log_error_errno(errno, "Failed to remove symlink %s: %m", p); } else if (r == -EINVAL) { if (arg_link_journal == LINK_GUEST && @@ -1425,10 +1388,8 @@ static int setup_journal(const char *directory) { return r; } - if (mount(p, q, "bind", MS_BIND, NULL) < 0) { - log_error_errno(errno, "Failed to bind mount journal from host into guest: %m"); - return -errno; - } + if (mount(p, q, "bind", MS_BIND, NULL) < 0) + return log_error_errno(errno, "Failed to bind mount journal from host into guest: %m"); return 0; } @@ -1631,16 +1592,19 @@ static int reset_audit_loginuid(void) { #define HOST_HASH_KEY SD_ID128_MAKE(1a,37,6f,c7,46,ec,45,0b,ad,a3,d5,31,06,60,5d,b1) #define CONTAINER_HASH_KEY SD_ID128_MAKE(c3,c4,f9,19,b5,57,b2,1c,e6,cf,14,27,03,9c,ee,a2) +#define MACVLAN_HASH_KEY SD_ID128_MAKE(00,13,6d,bc,66,83,44,81,bb,0c,f9,51,1f,24,a6,6f) -static int generate_mac(struct ether_addr *mac, sd_id128_t hash_key) { - int r; - +static int generate_mac(struct ether_addr *mac, sd_id128_t hash_key, uint64_t idx) { uint8_t result[8]; size_t l, sz; - uint8_t *v; + uint8_t *v, *i; + int r; l = strlen(arg_machine); sz = sizeof(sd_id128_t) + l; + if (idx > 0) + sz += sizeof(idx); + v = alloca(sz); /* fetch some persistent data unique to the host */ @@ -1650,7 +1614,11 @@ static int generate_mac(struct ether_addr *mac, sd_id128_t hash_key) { /* combine with some data unique (on this host) to this * container instance */ - memcpy(v + sizeof(sd_id128_t), arg_machine, l); + i = mempcpy(v + sizeof(sd_id128_t), arg_machine, l); + if (idx > 0) { + idx = htole64(idx); + memcpy(i, &idx, sizeof(idx)); + } /* Let's hash the host machine ID plus the container name. We * use a fixed, but originally randomly created hash key here. */ @@ -1683,17 +1651,13 @@ static int setup_veth(pid_t pid, char iface_name[IFNAMSIZ], int *ifi) { snprintf(iface_name, IFNAMSIZ - 1, "%s-%s", arg_network_bridge ? "vb" : "ve", arg_machine); - r = generate_mac(&mac_container, CONTAINER_HASH_KEY); - if (r < 0) { - log_error("Failed to generate predictable MAC address for container side"); - return r; - } + r = generate_mac(&mac_container, CONTAINER_HASH_KEY, 0); + if (r < 0) + return log_error_errno(r, "Failed to generate predictable MAC address for container side: %m"); - r = generate_mac(&mac_host, HOST_HASH_KEY); - if (r < 0) { - log_error("Failed to generate predictable MAC address for host side"); - return r; - } + r = generate_mac(&mac_host, HOST_HASH_KEY, 0); + if (r < 0) + return log_error_errno(r, "Failed to generate predictable MAC address for host side: %m"); r = sd_rtnl_open(&rtnl, 0); if (r < 0) @@ -1752,10 +1716,8 @@ static int setup_veth(pid_t pid, char iface_name[IFNAMSIZ], int *ifi) { return log_error_errno(r, "Failed to add new veth interfaces: %m"); i = (int) if_nametoindex(iface_name); - if (i <= 0) { - log_error_errno(errno, "Failed to resolve interface %s: %m", iface_name); - return -errno; - } + if (i <= 0) + return log_error_errno(errno, "Failed to resolve interface %s: %m", iface_name); *ifi = i; @@ -1777,10 +1739,8 @@ static int setup_bridge(const char veth_name[], int *ifi) { return 0; bridge = (int) if_nametoindex(arg_network_bridge); - if (bridge <= 0) { - log_error_errno(errno, "Failed to resolve interface %s: %m", arg_network_bridge); - return -errno; - } + if (bridge <= 0) + return log_error_errno(errno, "Failed to resolve interface %s: %m", arg_network_bridge); *ifi = bridge; @@ -1817,17 +1777,13 @@ static int parse_interface(struct udev *udev, const char *name) { int ifi; ifi = (int) if_nametoindex(name); - if (ifi <= 0) { - log_error_errno(errno, "Failed to resolve interface %s: %m", name); - return -errno; - } + if (ifi <= 0) + return log_error_errno(errno, "Failed to resolve interface %s: %m", name); sprintf(ifi_str, "n%i", ifi); d = udev_device_new_from_device_id(udev, ifi_str); - if (!d) { - log_error_errno(errno, "Failed to get udev device for interface %s: %m", name); - return -errno; - } + if (!d) + return log_error_errno(errno, "Failed to get udev device for interface %s: %m", name); if (udev_device_get_is_initialized(d) <= 0) { log_error("Network interface %s is not initialized yet.", name); @@ -1886,6 +1842,7 @@ static int move_network_interfaces(pid_t pid) { static int setup_macvlan(pid_t pid) { _cleanup_udev_unref_ struct udev *udev = NULL; _cleanup_rtnl_unref_ sd_rtnl *rtnl = NULL; + unsigned idx = 0; char **i; int r; @@ -1908,12 +1865,17 @@ static int setup_macvlan(pid_t pid) { STRV_FOREACH(i, arg_network_macvlan) { _cleanup_rtnl_message_unref_ sd_rtnl_message *m = NULL; _cleanup_free_ char *n = NULL; + struct ether_addr mac; int ifi; ifi = parse_interface(udev, *i); if (ifi < 0) return ifi; + r = generate_mac(&mac, MACVLAN_HASH_KEY, idx++); + if (r < 0) + return log_error_errno(r, "Failed to create MACVLAN MAC address: %m"); + r = sd_rtnl_message_new_link(rtnl, &m, RTM_NEWLINK, 0); if (r < 0) return log_error_errno(r, "Failed to allocate netlink message: %m"); @@ -1932,6 +1894,10 @@ static int setup_macvlan(pid_t pid) { if (r < 0) return log_error_errno(r, "Failed to add netlink interface name: %m"); + r = sd_rtnl_message_append_ether_addr(m, IFLA_ADDRESS, &mac); + if (r < 0) + return log_error_errno(r, "Failed to add netlink MAC address: %m"); + r = sd_rtnl_message_append_u32(m, IFLA_NET_NS_PID, pid); if (r < 0) return log_error_errno(r, "Failed to add netlink namespace field: %m"); @@ -2057,15 +2023,11 @@ static int setup_image(char **device_path, int *loop_nr) { assert(loop_nr); fd = open(arg_image, O_CLOEXEC|(arg_read_only ? O_RDONLY : O_RDWR)|O_NONBLOCK|O_NOCTTY); - if (fd < 0) { - log_error_errno(errno, "Failed to open %s: %m", arg_image); - return -errno; - } + if (fd < 0) + return log_error_errno(errno, "Failed to open %s: %m", arg_image); - if (fstat(fd, &st) < 0) { - log_error_errno(errno, "Failed to stat %s: %m", arg_image); - return -errno; - } + if (fstat(fd, &st) < 0) + return log_error_errno(errno, "Failed to stat %s: %m", arg_image); if (S_ISBLK(st.st_mode)) { char *p; @@ -2090,38 +2052,28 @@ static int setup_image(char **device_path, int *loop_nr) { } control = open("/dev/loop-control", O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK); - if (control < 0) { - log_error_errno(errno, "Failed to open /dev/loop-control: %m"); - return -errno; - } + if (control < 0) + return log_error_errno(errno, "Failed to open /dev/loop-control: %m"); nr = ioctl(control, LOOP_CTL_GET_FREE); - if (nr < 0) { - log_error_errno(errno, "Failed to allocate loop device: %m"); - return -errno; - } + if (nr < 0) + return log_error_errno(errno, "Failed to allocate loop device: %m"); if (asprintf(&loopdev, "/dev/loop%i", nr) < 0) return log_oom(); loop = open(loopdev, O_CLOEXEC|(arg_read_only ? O_RDONLY : O_RDWR)|O_NONBLOCK|O_NOCTTY); - if (loop < 0) { - log_error_errno(errno, "Failed to open loop device %s: %m", loopdev); - return -errno; - } + if (loop < 0) + return log_error_errno(errno, "Failed to open loop device %s: %m", loopdev); - if (ioctl(loop, LOOP_SET_FD, fd) < 0) { - log_error_errno(errno, "Failed to set loopback file descriptor on %s: %m", loopdev); - return -errno; - } + if (ioctl(loop, LOOP_SET_FD, fd) < 0) + return log_error_errno(errno, "Failed to set loopback file descriptor on %s: %m", loopdev); if (arg_read_only) info.lo_flags |= LO_FLAGS_READ_ONLY; - if (ioctl(loop, LOOP_SET_STATUS64, &info) < 0) { - log_error_errno(errno, "Failed to set loopback settings on %s: %m", loopdev); - return -errno; - } + if (ioctl(loop, LOOP_SET_STATUS64, &info) < 0) + return log_error_errno(errno, "Failed to set loopback settings on %s: %m", loopdev); *device_path = loopdev; loopdev = NULL; @@ -2142,7 +2094,14 @@ static int dissect_image( bool *secondary) { #ifdef HAVE_BLKID - int home_nr = -1, root_nr = -1, secondary_root_nr = -1, srv_nr = -1; + int home_nr = -1, srv_nr = -1; +#ifdef GPT_ROOT_NATIVE + int root_nr = -1; +#endif +#ifdef GPT_ROOT_SECONDARY + int secondary_root_nr = -1; +#endif + _cleanup_free_ char *home = NULL, *root = NULL, *secondary_root = NULL, *srv = NULL; _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL; _cleanup_udev_device_unref_ struct udev_device *d = NULL; @@ -2212,10 +2171,8 @@ static int dissect_image( if (!udev) return log_oom(); - if (fstat(fd, &st) < 0) { - log_error_errno(errno, "Failed to stat block device: %m"); - return -errno; - } + if (fstat(fd, &st) < 0) + return log_error_errno(errno, "Failed to stat block device: %m"); d = udev_device_new_from_devnum(udev, 'b', st.st_rdev); if (!d) @@ -2436,10 +2393,8 @@ static int mount_device(const char *what, const char *where, const char *directo return -ENOTSUP; } - if (mount(what, p, fstype, MS_NODEV|(rw ? 0 : MS_RDONLY), NULL) < 0) { - log_error_errno(errno, "Failed to mount %s: %m", what); - return -errno; - } + if (mount(what, p, fstype, MS_NODEV|(rw ? 0 : MS_RDONLY), NULL) < 0) + return log_error_errno(errno, "Failed to mount %s: %m", what); return 0; #else @@ -2511,16 +2466,13 @@ static int spawn_getent(const char *database, const char *key, pid_t *rpid) { assert(key); assert(rpid); - if (pipe2(pipe_fds, O_CLOEXEC) < 0) { - log_error_errno(errno, "Failed to allocate pipe: %m"); - return -errno; - } + if (pipe2(pipe_fds, O_CLOEXEC) < 0) + return log_error_errno(errno, "Failed to allocate pipe: %m"); pid = fork(); - if (pid < 0) { - log_error_errno(errno, "Failed to fork getent child: %m"); - return -errno; - } else if (pid == 0) { + if (pid < 0) + return log_error_errno(errno, "Failed to fork getent child: %m"); + else if (pid == 0) { int nullfd; char *empty_env = NULL; @@ -2579,20 +2531,14 @@ static int change_uid_gid(char **_home) { if (!arg_user || streq(arg_user, "root") || streq(arg_user, "0")) { /* Reset everything fully to 0, just in case */ - if (setgroups(0, NULL) < 0) { - log_error_errno(errno, "setgroups() failed: %m"); - return -errno; - } + if (setgroups(0, NULL) < 0) + return log_error_errno(errno, "setgroups() failed: %m"); - if (setresgid(0, 0, 0) < 0) { - log_error_errno(errno, "setregid() failed: %m"); - return -errno; - } + if (setresgid(0, 0, 0) < 0) + return log_error_errno(errno, "setregid() failed: %m"); - if (setresuid(0, 0, 0) < 0) { - log_error_errno(errno, "setreuid() failed: %m"); - return -errno; - } + if (setresuid(0, 0, 0) < 0) + return log_error_errno(errno, "setreuid() failed: %m"); *_home = NULL; return 0; @@ -2621,7 +2567,7 @@ static int change_uid_gid(char **_home) { truncate_nl(line); - wait_for_terminate_and_warn("getent passwd", pid); + wait_for_terminate_and_warn("getent passwd", pid, true); x = strchr(line, ':'); if (!x) { @@ -2705,7 +2651,7 @@ static int change_uid_gid(char **_home) { truncate_nl(line); - wait_for_terminate_and_warn("getent initgroups", pid); + wait_for_terminate_and_warn("getent initgroups", pid, true); /* Skip over the username and subsequent separator whitespace */ x = line; @@ -2740,20 +2686,14 @@ static int change_uid_gid(char **_home) { fchown(STDOUT_FILENO, uid, gid); fchown(STDERR_FILENO, uid, gid); - if (setgroups(n_uids, uids) < 0) { - log_error_errno(errno, "Failed to set auxiliary groups: %m"); - return -errno; - } + if (setgroups(n_uids, uids) < 0) + return log_error_errno(errno, "Failed to set auxiliary groups: %m"); - if (setresgid(gid, gid, gid) < 0) { - log_error_errno(errno, "setregid() failed: %m"); - return -errno; - } + if (setresgid(gid, gid, gid) < 0) + return log_error_errno(errno, "setregid() failed: %m"); - if (setresuid(uid, uid, uid) < 0) { - log_error_errno(errno, "setreuid() failed: %m"); - return -errno; - } + if (setresuid(uid, uid, uid) < 0) + return log_error_errno(errno, "setreuid() failed: %m"); if (_home) { *_home = home;