| /*** |
| This file is part of systemd. |
| |
| Copyright 2015 Lennart Poettering |
| |
| systemd is free software; you can redistribute it and/or modify it |
| under the terms of the GNU Lesser General Public License as published by |
| the Free Software Foundation; either version 2.1 of the License, or |
| (at your option) any later version. |
| |
| systemd is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public License |
| along with systemd; If not, see <http://www.gnu.org/licenses/>. |
| ***/ |
| |
| #include "alloc-util.h" |
| #include "cap-list.h" |
| #include "conf-parser.h" |
| #include "nspawn-network.h" |
| #include "nspawn-settings.h" |
| #include "parse-util.h" |
| #include "process-util.h" |
| #include "socket-util.h" |
| #include "string-util.h" |
| #include "strv.h" |
| #include "user-util.h" |
| #include "util.h" |
| |
| int settings_load(FILE *f, const char *path, Settings **ret) { |
| _cleanup_(settings_freep) Settings *s = NULL; |
| int r; |
| |
| assert(path); |
| assert(ret); |
| |
| s = new0(Settings, 1); |
| if (!s) |
| return -ENOMEM; |
| |
| s->start_mode = _START_MODE_INVALID; |
| s->personality = PERSONALITY_INVALID; |
| s->userns_mode = _USER_NAMESPACE_MODE_INVALID; |
| s->uid_shift = UID_INVALID; |
| s->uid_range = UID_INVALID; |
| |
| s->read_only = -1; |
| s->volatile_mode = _VOLATILE_MODE_INVALID; |
| s->userns_chown = -1; |
| |
| s->private_network = -1; |
| s->network_veth = -1; |
| |
| r = config_parse(NULL, path, f, |
| "Exec\0" |
| "Network\0" |
| "Files\0", |
| config_item_perf_lookup, nspawn_gperf_lookup, |
| false, |
| false, |
| true, |
| s); |
| if (r < 0) |
| return r; |
| |
| /* Make sure that if userns_mode is set, userns_chown is set to something appropriate, and vice versa. Either |
| * both fields shall be initialized or neither. */ |
| if (s->userns_mode == USER_NAMESPACE_PICK) |
| s->userns_chown = true; |
| else if (s->userns_mode != _USER_NAMESPACE_MODE_INVALID && s->userns_chown < 0) |
| s->userns_chown = false; |
| |
| if (s->userns_chown >= 0 && s->userns_mode == _USER_NAMESPACE_MODE_INVALID) |
| s->userns_mode = USER_NAMESPACE_NO; |
| |
| *ret = s; |
| s = NULL; |
| |
| return 0; |
| } |
| |
| Settings* settings_free(Settings *s) { |
| |
| if (!s) |
| return NULL; |
| |
| strv_free(s->parameters); |
| strv_free(s->environment); |
| free(s->user); |
| free(s->pivot_root_new); |
| free(s->pivot_root_old); |
| free(s->working_directory); |
| |
| strv_free(s->network_interfaces); |
| strv_free(s->network_macvlan); |
| strv_free(s->network_ipvlan); |
| strv_free(s->network_veth_extra); |
| free(s->network_bridge); |
| free(s->network_zone); |
| expose_port_free_all(s->expose_ports); |
| |
| custom_mount_free_all(s->custom_mounts, s->n_custom_mounts); |
| return mfree(s); |
| } |
| |
| bool settings_private_network(Settings *s) { |
| assert(s); |
| |
| return |
| s->private_network > 0 || |
| s->network_veth > 0 || |
| s->network_bridge || |
| s->network_zone || |
| s->network_interfaces || |
| s->network_macvlan || |
| s->network_ipvlan || |
| s->network_veth_extra; |
| } |
| |
| bool settings_network_veth(Settings *s) { |
| assert(s); |
| |
| return |
| s->network_veth > 0 || |
| s->network_bridge || |
| s->network_zone; |
| } |
| |
| DEFINE_CONFIG_PARSE_ENUM(config_parse_volatile_mode, volatile_mode, VolatileMode, "Failed to parse volatile mode"); |
| |
| int config_parse_expose_port( |
| const char *unit, |
| const char *filename, |
| unsigned line, |
| const char *section, |
| unsigned section_line, |
| const char *lvalue, |
| int ltype, |
| const char *rvalue, |
| void *data, |
| void *userdata) { |
| |
| Settings *s = data; |
| int r; |
| |
| assert(filename); |
| assert(lvalue); |
| assert(rvalue); |
| |
| r = expose_port_parse(&s->expose_ports, rvalue); |
| if (r == -EEXIST) { |
| log_syntax(unit, LOG_ERR, filename, line, r, "Duplicate port specification, ignoring: %s", rvalue); |
| return 0; |
| } |
| if (r < 0) { |
| log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse host port %s: %m", rvalue); |
| return 0; |
| } |
| |
| return 0; |
| } |
| |
| int config_parse_capability( |
| const char *unit, |
| const char *filename, |
| unsigned line, |
| const char *section, |
| unsigned section_line, |
| const char *lvalue, |
| int ltype, |
| const char *rvalue, |
| void *data, |
| void *userdata) { |
| |
| uint64_t u = 0, *result = data; |
| int r; |
| |
| assert(filename); |
| assert(lvalue); |
| assert(rvalue); |
| |
| for (;;) { |
| _cleanup_free_ char *word = NULL; |
| int cap; |
| |
| r = extract_first_word(&rvalue, &word, NULL, 0); |
| if (r < 0) { |
| log_syntax(unit, LOG_ERR, filename, line, r, "Failed to extract capability string, ignoring: %s", rvalue); |
| return 0; |
| } |
| if (r == 0) |
| break; |
| |
| cap = capability_from_name(word); |
| if (cap < 0) { |
| log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse capability, ignoring: %s", word); |
| continue; |
| } |
| |
| u |= UINT64_C(1) << cap; |
| } |
| |
| if (u == 0) |
| return 0; |
| |
| *result |= u; |
| return 0; |
| } |
| |
| int config_parse_id128( |
| const char *unit, |
| const char *filename, |
| unsigned line, |
| const char *section, |
| unsigned section_line, |
| const char *lvalue, |
| int ltype, |
| const char *rvalue, |
| void *data, |
| void *userdata) { |
| |
| sd_id128_t t, *result = data; |
| int r; |
| |
| assert(filename); |
| assert(lvalue); |
| assert(rvalue); |
| |
| r = sd_id128_from_string(rvalue, &t); |
| if (r < 0) { |
| log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse 128bit ID/UUID, ignoring: %s", rvalue); |
| return 0; |
| } |
| |
| *result = t; |
| return 0; |
| } |
| |
| int config_parse_pivot_root( |
| const char *unit, |
| const char *filename, |
| unsigned line, |
| const char *section, |
| unsigned section_line, |
| const char *lvalue, |
| int ltype, |
| const char *rvalue, |
| void *data, |
| void *userdata) { |
| |
| Settings *settings = data; |
| int r; |
| |
| assert(filename); |
| assert(lvalue); |
| assert(rvalue); |
| |
| r = pivot_root_parse(&settings->pivot_root_new, &settings->pivot_root_old, rvalue); |
| if (r < 0) { |
| log_syntax(unit, LOG_ERR, filename, line, r, "Invalid pivot root mount specification %s: %m", rvalue); |
| return 0; |
| } |
| |
| return 0; |
| } |
| |
| int config_parse_bind( |
| const char *unit, |
| const char *filename, |
| unsigned line, |
| const char *section, |
| unsigned section_line, |
| const char *lvalue, |
| int ltype, |
| const char *rvalue, |
| void *data, |
| void *userdata) { |
| |
| Settings *settings = data; |
| int r; |
| |
| assert(filename); |
| assert(lvalue); |
| assert(rvalue); |
| |
| r = bind_mount_parse(&settings->custom_mounts, &settings->n_custom_mounts, rvalue, ltype); |
| if (r < 0) { |
| log_syntax(unit, LOG_ERR, filename, line, r, "Invalid bind mount specification %s: %m", rvalue); |
| return 0; |
| } |
| |
| return 0; |
| } |
| |
| int config_parse_tmpfs( |
| const char *unit, |
| const char *filename, |
| unsigned line, |
| const char *section, |
| unsigned section_line, |
| const char *lvalue, |
| int ltype, |
| const char *rvalue, |
| void *data, |
| void *userdata) { |
| |
| Settings *settings = data; |
| int r; |
| |
| assert(filename); |
| assert(lvalue); |
| assert(rvalue); |
| |
| r = tmpfs_mount_parse(&settings->custom_mounts, &settings->n_custom_mounts, rvalue); |
| if (r < 0) { |
| log_syntax(unit, LOG_ERR, filename, line, r, "Invalid temporary file system specification %s: %m", rvalue); |
| return 0; |
| } |
| |
| return 0; |
| } |
| |
| int config_parse_overlay( |
| const char *unit, |
| const char *filename, |
| unsigned line, |
| const char *section, |
| unsigned section_line, |
| const char *lvalue, |
| int ltype, |
| const char *rvalue, |
| void *data, |
| void *userdata) { |
| |
| Settings *settings = data; |
| int r; |
| |
| assert(filename); |
| assert(lvalue); |
| assert(rvalue); |
| |
| r = overlay_mount_parse(&settings->custom_mounts, &settings->n_custom_mounts, rvalue, ltype); |
| if (r < 0) |
| log_syntax(unit, LOG_ERR, filename, line, r, "Invalid overlay file system specification %s, ignoring: %m", rvalue); |
| |
| return 0; |
| } |
| |
| int config_parse_veth_extra( |
| const char *unit, |
| const char *filename, |
| unsigned line, |
| const char *section, |
| unsigned section_line, |
| const char *lvalue, |
| int ltype, |
| const char *rvalue, |
| void *data, |
| void *userdata) { |
| |
| Settings *settings = data; |
| int r; |
| |
| assert(filename); |
| assert(lvalue); |
| assert(rvalue); |
| |
| r = veth_extra_parse(&settings->network_veth_extra, rvalue); |
| if (r < 0) { |
| log_syntax(unit, LOG_ERR, filename, line, r, "Invalid extra virtual Ethernet link specification %s: %m", rvalue); |
| return 0; |
| } |
| |
| return 0; |
| } |
| |
| int config_parse_network_zone( |
| const char *unit, |
| const char *filename, |
| unsigned line, |
| const char *section, |
| unsigned section_line, |
| const char *lvalue, |
| int ltype, |
| const char *rvalue, |
| void *data, |
| void *userdata) { |
| |
| Settings *settings = data; |
| _cleanup_free_ char *j = NULL; |
| |
| assert(filename); |
| assert(lvalue); |
| assert(rvalue); |
| |
| j = strappend("vz-", rvalue); |
| if (!ifname_valid(j)) { |
| log_syntax(unit, LOG_ERR, filename, line, 0, "Invalid network zone name %s, ignoring: %m", rvalue); |
| return 0; |
| } |
| |
| free(settings->network_zone); |
| settings->network_zone = j; |
| j = NULL; |
| |
| return 0; |
| } |
| |
| int config_parse_boot( |
| const char *unit, |
| const char *filename, |
| unsigned line, |
| const char *section, |
| unsigned section_line, |
| const char *lvalue, |
| int ltype, |
| const char *rvalue, |
| void *data, |
| void *userdata) { |
| |
| Settings *settings = data; |
| int r; |
| |
| assert(filename); |
| assert(lvalue); |
| assert(rvalue); |
| |
| r = parse_boolean(rvalue); |
| if (r < 0) { |
| log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse Boot= parameter %s, ignoring: %m", rvalue); |
| return 0; |
| } |
| |
| if (r > 0) { |
| if (settings->start_mode == START_PID2) |
| goto conflict; |
| |
| settings->start_mode = START_BOOT; |
| } else { |
| if (settings->start_mode == START_BOOT) |
| goto conflict; |
| |
| if (settings->start_mode < 0) |
| settings->start_mode = START_PID1; |
| } |
| |
| return 0; |
| |
| conflict: |
| log_syntax(unit, LOG_ERR, filename, line, r, "Conflicting Boot= or ProcessTwo= setting found. Ignoring."); |
| return 0; |
| } |
| |
| int config_parse_pid2( |
| const char *unit, |
| const char *filename, |
| unsigned line, |
| const char *section, |
| unsigned section_line, |
| const char *lvalue, |
| int ltype, |
| const char *rvalue, |
| void *data, |
| void *userdata) { |
| |
| Settings *settings = data; |
| int r; |
| |
| assert(filename); |
| assert(lvalue); |
| assert(rvalue); |
| |
| r = parse_boolean(rvalue); |
| if (r < 0) { |
| log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse ProcessTwo= parameter %s, ignoring: %m", rvalue); |
| return 0; |
| } |
| |
| if (r > 0) { |
| if (settings->start_mode == START_BOOT) |
| goto conflict; |
| |
| settings->start_mode = START_PID2; |
| } else { |
| if (settings->start_mode == START_PID2) |
| goto conflict; |
| |
| if (settings->start_mode < 0) |
| settings->start_mode = START_PID1; |
| } |
| |
| return 0; |
| |
| conflict: |
| log_syntax(unit, LOG_ERR, filename, line, r, "Conflicting Boot= or ProcessTwo= setting found. Ignoring."); |
| return 0; |
| } |
| |
| int config_parse_private_users( |
| const char *unit, |
| const char *filename, |
| unsigned line, |
| const char *section, |
| unsigned section_line, |
| const char *lvalue, |
| int ltype, |
| const char *rvalue, |
| void *data, |
| void *userdata) { |
| |
| Settings *settings = data; |
| int r; |
| |
| assert(filename); |
| assert(lvalue); |
| assert(rvalue); |
| |
| r = parse_boolean(rvalue); |
| if (r == 0) { |
| /* no: User namespacing off */ |
| settings->userns_mode = USER_NAMESPACE_NO; |
| settings->uid_shift = UID_INVALID; |
| settings->uid_range = UINT32_C(0x10000); |
| } else if (r > 0) { |
| /* yes: User namespacing on, UID range is read from root dir */ |
| settings->userns_mode = USER_NAMESPACE_FIXED; |
| settings->uid_shift = UID_INVALID; |
| settings->uid_range = UINT32_C(0x10000); |
| } else if (streq(rvalue, "pick")) { |
| /* pick: User namespacing on, UID range is picked randomly */ |
| settings->userns_mode = USER_NAMESPACE_PICK; |
| settings->uid_shift = UID_INVALID; |
| settings->uid_range = UINT32_C(0x10000); |
| } else { |
| const char *range, *shift; |
| uid_t sh, rn; |
| |
| /* anything else: User namespacing on, UID range is explicitly configured */ |
| |
| range = strchr(rvalue, ':'); |
| if (range) { |
| shift = strndupa(rvalue, range - rvalue); |
| range++; |
| |
| r = safe_atou32(range, &rn); |
| if (r < 0 || rn <= 0) { |
| log_syntax(unit, LOG_ERR, filename, line, r, "UID/GID range invalid, ignoring: %s", range); |
| return 0; |
| } |
| } else { |
| shift = rvalue; |
| rn = UINT32_C(0x10000); |
| } |
| |
| r = parse_uid(shift, &sh); |
| if (r < 0) { |
| log_syntax(unit, LOG_ERR, filename, line, r, "UID/GID shift invalid, ignoring: %s", range); |
| return 0; |
| } |
| |
| settings->userns_mode = USER_NAMESPACE_FIXED; |
| settings->uid_shift = sh; |
| settings->uid_range = rn; |
| } |
| |
| return 0; |
| } |