src/lxc/conf.h

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #ifndef __LXC_CONF_H
   4 #define __LXC_CONF_H
   5
   6 #ifndef _GNU_SOURCE
   7 #define _GNU_SOURCE 1
   8 #endif
   9 #include <linux/magic.h>
  10 #include <net/if.h>
  11 #include <netinet/in.h>
  12 #include <stdbool.h>
  13 #include <stdio.h>
  14 #include <sys/param.h>
  15 #include <sys/types.h>
  16 #include <sys/vfs.h>
  17
  18 #include "attach_options.h"
  19 #include "caps.h"
  20 #include "compiler.h"
  21 #include "config.h"
  22 #include "hlist.h"
  23 #include "list.h"
  24 #include "lxcseccomp.h"
  25 #include "memory_utils.h"
  26 #include "namespace.h"
  27 #include "ringbuf.h"
  28 #include "start.h"
  29 #include "state.h"
  30 #include "storage/storage.h"
  31 #include "string_utils.h"
  32 #include "syscall_wrappers.h"
  33 #include "terminal.h"
  34
  35 #if HAVE_SYS_RESOURCE_H
  36 #include <sys/resource.h>
  37 #endif
  38
  39 #if HAVE_SCMP_FILTER_CTX
  40 typedef void * scmp_filter_ctx;
  41 #endif
  42
  43 typedef signed long personality_t;
  44
  45 /* worth moving to configure.ac? */
  46 #define subuidfile "/etc/subuid"
  47 #define subgidfile "/etc/subgid"
  48
  49 /*
  50  * Defines a generic struct to configure the control group. It is up to the
  51  * programmer to specify the right subsystem.
  52  * @subsystem : the targeted subsystem
  53  * @value     : the value to set
  54  * @version   : The version of the cgroup filesystem on which the controller
  55  *              resides.
  56  *
  57  * @controllers : The controllers to use for this container.
  58  * @dir         : The name of the directory containing the container's cgroup.
  59  *                Not that this is a per-container setting.
  60  */
  61 struct lxc_cgroup {
  62         union {
  63                 /* information about a specific controller */
  64                 struct /* controller */ {
  65                         int version;
  66                         char *subsystem;
  67                         char *value;
  68                 };
  69
  70                 /* meta information about cgroup configuration */
  71                 struct /* meta */ {
  72                         char *controllers;
  73                         char *dir;
  74                         char *monitor_dir;
  75                         char *monitor_pivot_dir;
  76                         char *container_dir;
  77                         char *namespace_dir;
  78                         bool relative;
  79                 };
  80         };
  81
  82         struct list_head head;
  83 };
  84
  85 static void free_lxc_cgroup(struct lxc_cgroup *ptr)
  86 {
  87         if (ptr) {
  88                 free(ptr->subsystem);
  89                 free(ptr->value);
  90                 free_disarm(ptr);
  91         }
  92 }
  93 define_cleanup_function(struct lxc_cgroup *, free_lxc_cgroup);
  94
  95 #if !HAVE_SYS_RESOURCE_H
  96 #define RLIM_INFINITY ((unsigned long)-1)
  97 struct rlimit {
  98         unsigned long rlim_cur;
  99         unsigned long rlim_max;
 100         struct list_head head;
 101 };
 102 #endif
 103
 104 /*
 105  * Defines a structure to configure resource limits to set via setrlimit().
 106  * @resource : the resource name in lowercase without the RLIMIT_ prefix
 107  * @limit    : the limit to set
 108  */
 109 struct lxc_limit {
 110         char *resource;
 111         struct rlimit limit;
 112         struct list_head head;
 113 };
 114
 115 static void free_lxc_limit(struct lxc_limit *ptr)
 116 {
 117         if (ptr) {
 118                 free_disarm(ptr->resource);
 119                 free_disarm(ptr);
 120         }
 121 }
 122 define_cleanup_function(struct lxc_limit *, free_lxc_limit);
 123
 124 enum idtype {
 125         ID_TYPE_UID,
 126         ID_TYPE_GID
 127 };
 128
 129 /*
 130  * Defines a structure to configure kernel parameters at runtime.
 131  * @key      : the kernel parameters will be configured without the "lxc.sysctl" prefix
 132  * @value    : the value to set
 133  */
 134 struct lxc_sysctl {
 135         char *key;
 136         char *value;
 137         struct list_head head;
 138 };
 139
 140 static void free_lxc_sysctl(struct lxc_sysctl *ptr)
 141 {
 142         if (ptr) {
 143                 free(ptr->key);
 144                 free(ptr->value);
 145                 free_disarm(ptr);
 146         }
 147 }
 148 define_cleanup_function(struct lxc_sysctl *, free_lxc_sysctl);
 149
 150 /*
 151  * Defines a structure to configure proc filesystem at runtime.
 152  * @filename : the proc filesystem will be configured without the "lxc.proc" prefix
 153  * @value    : the value to set
 154  */
 155 struct lxc_proc {
 156         char *filename;
 157         char *value;
 158         struct list_head head;
 159 };
 160
 161 static void free_lxc_proc(struct lxc_proc *ptr)
 162 {
 163         if (ptr) {
 164                 free(ptr->filename);
 165                 free(ptr->value);
 166                 free_disarm(ptr);
 167         }
 168 }
 169 define_cleanup_function(struct lxc_proc *, free_lxc_proc);
 170
 171 /*
 172  * id_map is an id map entry.  Form in confile is:
 173  * lxc.idmap = u 0    9800 100
 174  * lxc.idmap = u 1000 9900 100
 175  * lxc.idmap = g 0    9800 100
 176  * lxc.idmap = g 1000 9900 100
 177  * meaning the container can use uids and gids 0-99 and 1000-1099,
 178  * with [ug]id 0 mapping to [ug]id 9800 on the host, and [ug]id 1000 to
 179  * [ug]id 9900 on the host.
 180  */
 181 struct id_map {
 182         enum idtype idtype;
 183         unsigned long hostid, nsid, range;
 184         struct list_head head;
 185 };
 186
 187 /* Defines the number of tty configured and contains the
 188  * instantiated ptys
 189  * @max = number of configured ttys
 190  */
 191 struct lxc_tty_info {
 192         size_t max;
 193         char *dir;
 194         char *tty_names;
 195         struct lxc_terminal_info *tty;
 196 };
 197
 198 typedef enum lxc_mount_options_t {
 199         LXC_MOUNT_CREATE_DIR    = 0,
 200         LXC_MOUNT_CREATE_FILE   = 1,
 201         LXC_MOUNT_OPTIONAL      = 2,
 202         LXC_MOUNT_RELATIVE      = 3,
 203         LXC_MOUNT_IDMAP         = 4,
 204         LXC_MOUNT_MAX           = 5,
 205 } lxc_mount_options_t;
 206
 207 __hidden extern const char *lxc_mount_options_info[LXC_MOUNT_MAX];
 208
 209 struct lxc_mount_options {
 210         unsigned int create_dir : 1;
 211         unsigned int create_file : 1;
 212         unsigned int optional : 1;
 213         unsigned int relative : 1;
 214         unsigned int bind_recursively : 1;
 215         unsigned int propagate_recursively : 1;
 216         unsigned int bind : 1;
 217         char userns_path[PATH_MAX];
 218         unsigned long mnt_flags;
 219         unsigned long prop_flags;
 220         char *data;
 221         struct lxc_mount_attr attr;
 222         char *raw_options;
 223 };
 224
 225 /* Defines a structure to store the rootfs location, the
 226  * optionals pivot_root, rootfs mount paths
 227  * @path         : the rootfs source (directory or device)
 228  * @mount        : where it is mounted
 229  * @buf          : static buffer to construct paths
 230  * @bev_type     : optional backing store type
 231  * @managed      : whether it is managed by LXC
 232  * @dfd_mnt      : fd for @mount
 233  * @dfd_dev : fd for /dev of the container
 234  */
 235 struct lxc_rootfs {
 236         int dfd_host;
 237
 238         char *path;
 239         int fd_path_pin;
 240         int dfd_idmapped;
 241
 242         int dfd_mnt;
 243         char *mount;
 244
 245         int dfd_dev;
 246
 247         char buf[PATH_MAX];
 248         char *bdev_type;
 249         bool managed;
 250         struct lxc_mount_options mnt_opts;
 251         struct lxc_storage *storage;
 252 };
 253
 254 /*
 255  * Automatic mounts for LXC to perform inside the container
 256  */
 257 enum {
 258         LXC_AUTO_PROC_RW              = 0x001, /* /proc read-write */
 259         LXC_AUTO_PROC_MIXED           = 0x002, /* /proc/sys and /proc/sysrq-trigger read-only */
 260         LXC_AUTO_PROC_MASK            = 0x003,
 261
 262         LXC_AUTO_SYS_RW               = 0x004, /* /sys */
 263         LXC_AUTO_SYS_RO               = 0x008, /* /sys read-only */
 264         LXC_AUTO_SYS_MIXED            = 0x00C, /* /sys read-only and /sys/class/net read-write */
 265         LXC_AUTO_SYS_MASK             = 0x00C,
 266
 267         LXC_AUTO_CGROUP_RO            = 0x010, /* /sys/fs/cgroup (partial mount, read-only) */
 268         LXC_AUTO_CGROUP_RW            = 0x020, /* /sys/fs/cgroup (partial mount, read-write) */
 269         LXC_AUTO_CGROUP_MIXED         = 0x030, /* /sys/fs/cgroup (partial mount, paths r/o, cgroup r/w) */
 270         LXC_AUTO_CGROUP_FULL_RO       = 0x040, /* /sys/fs/cgroup (full mount, read-only) */
 271         LXC_AUTO_CGROUP_FULL_RW       = 0x050, /* /sys/fs/cgroup (full mount, read-write) */
 272         LXC_AUTO_CGROUP_FULL_MIXED    = 0x060, /* /sys/fs/cgroup (full mount, parent r/o, own r/w) */
 273         /*
 274          * These are defined in such a way as to retain binary compatibility
 275          * with earlier versions of this code. If the previous mask is applied,
 276          * both of these will default back to the _MIXED variants, which is
 277          * safe.
 278          */
 279         LXC_AUTO_CGROUP_NOSPEC        = 0x0B0, /* /sys/fs/cgroup (partial mount, r/w or mixed, depending on caps) */
 280         LXC_AUTO_CGROUP_FULL_NOSPEC   = 0x0E0, /* /sys/fs/cgroup (full mount, r/w or mixed, depending on caps) */
 281         LXC_AUTO_CGROUP_FORCE         = 0x100, /* mount cgroups even when cgroup namespaces are supported */
 282         LXC_AUTO_CGROUP_MASK          = 0x1F0, /* all known cgroup options */
 283
 284         LXC_AUTO_SHMOUNTS             = 0x200, /* shared mount point */
 285         LXC_AUTO_SHMOUNTS_MASK        = 0x200, /* shared mount point mask */
 286         LXC_AUTO_ALL_MASK             = 0x1FF, /* all known settings */
 287 };
 288
 289 enum lxchooks {
 290         LXCHOOK_PRESTART,
 291         LXCHOOK_PREMOUNT,
 292         LXCHOOK_MOUNT,
 293         LXCHOOK_AUTODEV,
 294         LXCHOOK_START,
 295         LXCHOOK_STOP,
 296         LXCHOOK_POSTSTOP,
 297         LXCHOOK_CLONE,
 298         LXCHOOK_DESTROY,
 299         LXCHOOK_START_HOST,
 300         NUM_LXC_HOOKS
 301 };
 302
 303 __hidden extern char *lxchook_names[NUM_LXC_HOOKS];
 304
 305 struct lxc_state_client {
 306         int clientfd;
 307         lxc_state_t states[MAX_STATE];
 308         struct list_head head;
 309 };
 310
 311 typedef enum lxc_bpf_devices_rule_t {
 312         LXC_BPF_DEVICE_CGROUP_ALLOWLIST         = 0,
 313         LXC_BPF_DEVICE_CGROUP_DENYLIST          = 1,
 314 } lxc_bpf_devices_rule_t;
 315
 316 struct device_item {
 317         char type;
 318         int major;
 319         int minor;
 320         char access[4];
 321         int allow;
 322         struct list_head head;
 323 };
 324
 325 struct bpf_devices {
 326         lxc_bpf_devices_rule_t list_type;
 327         struct list_head devices;
 328 };
 329
 330 struct timens_offsets {
 331         /* Currently, either s_boot or ns_boot is set, but not both. */
 332         int64_t s_boot;
 333         int64_t ns_boot;
 334
 335         /* Currently, either s_monotonic or ns_monotonic is set, but not both. */
 336         int64_t s_monotonic;
 337         int64_t ns_monotonic;
 338 };
 339
 340 struct environment_entry {
 341         char *key;
 342         char *val;
 343         struct list_head head;
 344 };
 345
 346 struct cap_entry {
 347         char *cap_name;
 348         int cap;
 349         struct list_head head;
 350 };
 351
 352 struct caps {
 353         int keep;
 354         struct list_head list;
 355 };
 356
 357 struct lxc_conf {
 358         /* Pointer to the name of the container. Do not free! */
 359         const char *name;
 360         bool is_execute;
 361         int reboot;
 362         personality_t personality;
 363         struct utsname *utsname;
 364
 365         struct {
 366                 struct list_head cgroup;
 367                 struct list_head cgroup2;
 368                 struct bpf_devices bpf_devices;
 369         };
 370
 371         struct {
 372                 struct list_head id_map;
 373
 374                 /*
 375                  * Pointer to the idmap entry for the container's root uid in
 376                  * the id_map list. Do not free!
 377                  */
 378                 const struct id_map *root_nsuid_map;
 379
 380                 /*
 381                  * Pointer to the idmap entry for the container's root gid in
 382                  * the id_map list. Do not free!
 383                  */
 384                 const struct id_map *root_nsgid_map;
 385         };
 386
 387         struct list_head netdevs;
 388
 389         struct {
 390                 char *fstab;
 391                 int auto_mounts;
 392                 struct lxc_list mount_list;
 393         };
 394
 395         struct caps caps;
 396
 397         /* /dev/tty<idx> devices */
 398         struct lxc_tty_info ttys;
 399         /* /dev/console device */
 400         struct lxc_terminal console;
 401         /* maximum pty devices allowed by devpts mount */
 402         size_t pty_max;
 403         /* file descriptor for the container's /dev/pts mount */
 404         int devpts_fd;
 405
 406         /* set to true when rootfs has been setup */
 407         bool rootfs_setup;
 408         struct lxc_rootfs rootfs;
 409
 410         bool close_all_fds;
 411
 412         struct {
 413                 unsigned int hooks_version;
 414                 struct lxc_list hooks[NUM_LXC_HOOKS];
 415         };
 416
 417         char *lsm_aa_profile;
 418         char *lsm_aa_profile_computed;
 419         bool lsm_aa_profile_created;
 420         unsigned int lsm_aa_allow_nesting;
 421         unsigned int lsm_aa_allow_incomplete;
 422         struct lxc_list lsm_aa_raw;
 423         char *lsm_se_context;
 424         char *lsm_se_keyring_context;
 425         bool keyring_disable_session;
 426         bool transient_procfs_mnt;
 427         struct lxc_seccomp seccomp;
 428         int maincmd_fd;
 429         unsigned int autodev;  /* if 1, mount and fill a /dev at start */
 430         int autodevtmpfssize; /* size of the /dev tmpfs */
 431         int haltsignal; /* signal used to halt container */
 432         int rebootsignal; /* signal used to reboot container */
 433         int stopsignal; /* signal used to hard stop container */
 434         char *rcfile;   /* Copy of the top level rcfile we read */
 435
 436         /* Logfile and loglevel can be set in a container config file. Those
 437          * function as defaults. The defaults can be overridden by command line.
 438          * However we don't want the command line specified values to be saved
 439          * on c->save_config(). So we store the config file specified values
 440          * here. */
 441         char *logfile; /* the logfile as specified in config */
 442         int loglevel; /* loglevel as specified in config (if any) */
 443         int logfd;
 444
 445         unsigned int start_auto;
 446         unsigned int start_delay;
 447         int start_order;
 448         struct lxc_list groups;
 449         int nbd_idx;
 450
 451         /* unshare the mount namespace in the monitor */
 452         unsigned int monitor_unshare;
 453         unsigned int monitor_signal_pdeath;
 454
 455         /* list of environment variables we'll add to the container when
 456          * started */
 457         struct list_head environment;
 458
 459         /* text representation of the config file */
 460         char *unexpanded_config;
 461         size_t unexpanded_len;
 462         size_t unexpanded_alloced;
 463
 464         /* default command for lxc-execute */
 465         char *execute_cmd;
 466
 467         /* init command */
 468         char *init_cmd;
 469
 470         /* The uid to use for the container. */
 471         uid_t init_uid;
 472         /* The gid to use for the container. */
 473         gid_t init_gid;
 474         /* The groups to use for the container. */
 475         lxc_groups_t init_groups;
 476
 477         /* indicator if the container will be destroyed on shutdown */
 478         unsigned int ephemeral;
 479
 480         /* The facility to pass to syslog. Let's users establish as what type of
 481          * program liblxc is supposed to write to the syslog. */
 482         char *syslog;
 483
 484         /* Whether PR_SET_NO_NEW_PRIVS will be set for the container. */
 485         bool no_new_privs;
 486
 487         /* RLIMIT_* limits */
 488         struct list_head limits;
 489
 490         /* Contains generic info about the cgroup configuration for this
 491          * container. Note that struct lxc_cgroup contains a union. It is only
 492          * valid to access the members of the anonymous "meta" struct within
 493          * that union.
 494          */
 495         struct lxc_cgroup cgroup_meta;
 496
 497         struct {
 498                 int ns_clone;
 499                 int ns_keep;
 500                 char *ns_share[LXC_NS_MAX];
 501         };
 502
 503         /* init working directory */
 504         char *init_cwd;
 505
 506         /* A list of clients registered to be informed about a container state. */
 507         struct list_head state_clients;
 508
 509         /* sysctls */
 510         struct list_head sysctls;
 511
 512         /* procs */
 513         struct list_head procs;
 514
 515         struct shmount {
 516                 /* Absolute path to the shared mount point on the host */
 517                 char *path_host;
 518                 /* Absolute path (in the container) to the shared mount point */
 519                 char *path_cont;
 520         } shmount;
 521
 522         struct timens_offsets timens;
 523 };
 524
 525 __hidden extern int write_id_mapping(enum idtype idtype, pid_t pid, const char *buf, size_t buf_size)
 526     __access_r(3, 4);
 527
 528 extern thread_local struct lxc_conf *current_config;
 529
 530 __hidden extern int run_lxc_hooks(const char *name, char *hook, struct lxc_conf *conf, char *argv[]);
 531 __hidden extern struct lxc_conf *lxc_conf_init(void);
 532 __hidden extern void lxc_conf_free(struct lxc_conf *conf);
 533 __hidden extern int lxc_storage_prepare(struct lxc_conf *conf);
 534 __hidden extern int lxc_rootfs_prepare(struct lxc_conf *conf, bool userns);
 535 __hidden extern void lxc_storage_put(struct lxc_conf *conf);
 536 __hidden extern int lxc_rootfs_init(struct lxc_conf *conf, bool userns);
 537 __hidden extern int lxc_rootfs_prepare_parent(struct lxc_handler *handler);
 538 __hidden extern int lxc_idmapped_mounts_parent(struct lxc_handler *handler);
 539 __hidden extern int lxc_map_ids(struct list_head *idmap, pid_t pid);
 540 __hidden extern int lxc_create_tty(const char *name, struct lxc_conf *conf);
 541 __hidden extern void lxc_delete_tty(struct lxc_tty_info *ttys);
 542 __hidden extern int lxc_clear_config_caps(struct lxc_conf *c);
 543 __hidden extern int lxc_clear_cgroups(struct lxc_conf *c, const char *key, int version);
 544 __hidden extern int lxc_clear_mount_entries(struct lxc_conf *c);
 545 __hidden extern int lxc_clear_automounts(struct lxc_conf *c);
 546 __hidden extern int lxc_clear_hooks(struct lxc_conf *c, const char *key);
 547 __hidden extern int lxc_clear_idmaps(struct lxc_conf *c);
 548 __hidden extern int lxc_clear_groups(struct lxc_conf *c);
 549 __hidden extern int lxc_clear_environment(struct lxc_conf *c);
 550 __hidden extern int lxc_clear_limits(struct lxc_conf *c, const char *key);
 551 __hidden extern int lxc_delete_autodev(struct lxc_handler *handler);
 552 __hidden extern int lxc_clear_autodev_tmpfs_size(struct lxc_conf *c);
 553 __hidden extern int lxc_setup_rootfs_prepare_root(struct lxc_conf *conf, const char *name,
 554                                                   const char *lxcpath);
 555 __hidden extern int lxc_setup(struct lxc_handler *handler);
 556 __hidden extern int lxc_setup_parent(struct lxc_handler *handler);
 557 __hidden extern int setup_resource_limits(struct lxc_conf *conf, pid_t pid);
 558 __hidden extern int find_unmapped_nsid(const struct lxc_conf *conf, enum idtype idtype);
 559 __hidden extern int mapped_hostid(unsigned id, const struct lxc_conf *conf, enum idtype idtype);
 560 __hidden extern int userns_exec_1(const struct lxc_conf *conf, int (*fn)(void *), void *data,
 561                                   const char *fn_name);
 562 __hidden extern int userns_exec_full(struct lxc_conf *conf, int (*fn)(void *), void *data,
 563                                      const char *fn_name);
 564 __hidden extern int parse_mntopts_legacy(const char *mntopts, unsigned long *mntflags, char **mntdata);
 565 __hidden extern int parse_propagationopts(const char *mntopts, unsigned long *pflags);
 566 __hidden extern int parse_lxc_mount_attrs(struct lxc_mount_options *opts, char *mnt_opts);
 567 __hidden extern int parse_mount_attrs(struct lxc_mount_options *opts, const char *mntopts);
 568 __hidden extern void tmp_proc_unmount(struct lxc_conf *lxc_conf);
 569 __hidden extern void suggest_default_idmap(void);
 570 __hidden extern FILE *make_anonymous_mount_file(struct lxc_list *mount, bool include_nesting_helpers);
 571 __hidden extern int run_script(const char *name, const char *section, const char *script, ...);
 572 __hidden extern int run_script_argv(const char *name, unsigned int hook_version, const char *section,
 573                                     const char *script, const char *hookname, char **argsin);
 574
 575 __hidden extern bool has_cap(int cap, struct lxc_conf *conf);
 576 static inline bool lxc_wants_cap(int cap, struct lxc_conf *conf)
 577 {
 578         if (lxc_caps_last_cap() < cap)
 579                 return false;
 580
 581         return has_cap(cap, conf);
 582 }
 583
 584 __hidden extern int setup_sysctl_parameters(struct lxc_conf *conf);
 585 __hidden extern int lxc_clear_sysctls(struct lxc_conf *c, const char *key);
 586 __hidden extern int setup_proc_filesystem(struct lxc_conf *conf, pid_t pid);
 587 __hidden extern int lxc_clear_procs(struct lxc_conf *c, const char *key);
 588 __hidden extern int lxc_clear_apparmor_raw(struct lxc_conf *c);
 589 __hidden extern int lxc_clear_namespace(struct lxc_conf *c);
 590 __hidden extern int userns_exec_minimal(const struct lxc_conf *conf, int (*fn_parent)(void *),
 591                                         void *fn_parent_data, int (*fn_child)(void *),
 592                                         void *fn_child_data);
 593 __hidden extern int userns_exec_mapped_root(const char *path, int path_fd,
 594                                             const struct lxc_conf *conf);
 595 static inline int chown_mapped_root(const char *path, const struct lxc_conf *conf)
 596 {
 597         return userns_exec_mapped_root(path, -EBADF, conf);
 598 }
 599
 600 __hidden extern int lxc_sync_fds_parent(struct lxc_handler *handler);
 601 __hidden extern int lxc_sync_fds_child(struct lxc_handler *handler);
 602
 603 static inline const char *get_rootfs_mnt(const struct lxc_rootfs *rootfs)
 604 {
 605         static const char *s = "/";
 606
 607         return !is_empty_string(rootfs->path) ? rootfs->mount : s;
 608 }
 609
 610 static inline void put_lxc_mount_options(struct lxc_mount_options *mnt_opts)
 611 {
 612         mnt_opts->create_dir = 0;
 613         mnt_opts->create_file = 0;
 614         mnt_opts->optional = 0;
 615         mnt_opts->relative = 0;
 616         mnt_opts->userns_path[0] = '\0';
 617         mnt_opts->mnt_flags = 0;
 618         mnt_opts->prop_flags = 0;
 619
 620         free_disarm(mnt_opts->data);
 621         free_disarm(mnt_opts->raw_options);
 622 }
 623
 624 static inline void put_lxc_rootfs(struct lxc_rootfs *rootfs, bool unpin)
 625 {
 626         if (rootfs) {
 627                 close_prot_errno_disarm(rootfs->dfd_host);
 628                 close_prot_errno_disarm(rootfs->dfd_mnt);
 629                 close_prot_errno_disarm(rootfs->dfd_dev);
 630                 if (unpin)
 631                         close_prot_errno_disarm(rootfs->fd_path_pin);
 632                 close_prot_errno_disarm(rootfs->dfd_idmapped);
 633                 put_lxc_mount_options(&rootfs->mnt_opts);
 634                 storage_put(rootfs->storage);
 635                 rootfs->storage = NULL;
 636         }
 637 }
 638
 639 static inline void lxc_clear_cgroup2_devices(struct bpf_devices *bpf_devices)
 640 {
 641         struct device_item *device, *n;
 642
 643         list_for_each_entry_safe(device, n, &bpf_devices->devices, head)
 644                 list_del(&device->head);
 645
 646         INIT_LIST_HEAD(&bpf_devices->devices);
 647 }
 648
 649 static inline int lxc_personality(personality_t persona)
 650 {
 651         if (persona < 0)
 652                 return ret_errno(EINVAL);
 653
 654         return personality(persona);
 655 }
 656
 657 __hidden extern int lxc_set_environment(const struct lxc_conf *conf);
 658 __hidden extern int parse_cap(const char *cap);
 659
 660 #endif /* __LXC_CONF_H */