src/lxc/conf.h

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #ifndef __LXC_CONF_H
   4 #define __LXC_CONF_H
   5
   6 #include "config.h"
   7
   8 #include <linux/magic.h>
   9 #include <net/if.h>
  10 #include <netinet/in.h>
  11 #include <stdbool.h>
  12 #include <stdio.h>
  13 #include <sys/param.h>
  14 #include <sys/types.h>
  15 #include <sys/vfs.h>
  16
  17 #include "attach_options.h"
  18 #include "caps.h"
  19 #include "compiler.h"
  20 #include "hlist.h"
  21 #include "list.h"
  22 #include "lxcseccomp.h"
  23 #include "memory_utils.h"
  24 #include "namespace.h"
  25 #include "ringbuf.h"
  26 #include "start.h"
  27 #include "state.h"
  28 #include "storage/storage.h"
  29 #include "string_utils.h"
  30 #include "syscall_wrappers.h"
  31 #include "terminal.h"
  32
  33 #if HAVE_SYS_RESOURCE_H
  34 #include <sys/resource.h>
  35 #endif
  36
  37 #if HAVE_SCMP_FILTER_CTX
  38 typedef void * scmp_filter_ctx;
  39 #endif
  40
  41 typedef signed long personality_t;
  42
  43 /* worth moving to configure.ac? */
  44 #define subuidfile "/etc/subuid"
  45 #define subgidfile "/etc/subgid"
  46
  47 /*
  48  * Defines a generic struct to configure the control group. It is up to the
  49  * programmer to specify the right subsystem.
  50  * @subsystem : the targeted subsystem
  51  * @value     : the value to set
  52  * @version   : The version of the cgroup filesystem on which the controller
  53  *              resides.
  54  *
  55  * @controllers : The controllers to use for this container.
  56  * @dir         : The name of the directory containing the container's cgroup.
  57  *                Not that this is a per-container setting.
  58  */
  59 struct lxc_cgroup {
  60         union {
  61                 /* information about a specific controller */
  62                 struct /* controller */ {
  63                         int version;
  64                         char *subsystem;
  65                         char *value;
  66                 };
  67
  68                 /* meta information about cgroup configuration */
  69                 struct /* meta */ {
  70                         char *controllers;
  71                         char *dir;
  72                         char *monitor_dir;
  73                         char *monitor_pivot_dir;
  74                         char *container_dir;
  75                         char *namespace_dir;
  76                         bool relative;
  77                 };
  78         };
  79
  80         struct list_head head;
  81 };
  82
  83 static void free_lxc_cgroup(struct lxc_cgroup *ptr)
  84 {
  85         if (ptr) {
  86                 free(ptr->subsystem);
  87                 free(ptr->value);
  88                 free_disarm(ptr);
  89         }
  90 }
  91 define_cleanup_function(struct lxc_cgroup *, free_lxc_cgroup);
  92
  93 #if !HAVE_SYS_RESOURCE_H
  94 #define RLIM_INFINITY ((unsigned long)-1)
  95 struct rlimit {
  96         unsigned long rlim_cur;
  97         unsigned long rlim_max;
  98         struct list_head head;
  99 };
 100 #endif
 101
 102 /*
 103  * Defines a structure to configure resource limits to set via setrlimit().
 104  * @resource : the resource name in lowercase without the RLIMIT_ prefix
 105  * @limit    : the limit to set
 106  */
 107 struct lxc_limit {
 108         char *resource;
 109         struct rlimit limit;
 110         struct list_head head;
 111 };
 112
 113 static void free_lxc_limit(struct lxc_limit *ptr)
 114 {
 115         if (ptr) {
 116                 free_disarm(ptr->resource);
 117                 free_disarm(ptr);
 118         }
 119 }
 120 define_cleanup_function(struct lxc_limit *, free_lxc_limit);
 121
 122 enum idtype {
 123         ID_TYPE_UID,
 124         ID_TYPE_GID
 125 };
 126
 127 /*
 128  * Defines a structure to configure kernel parameters at runtime.
 129  * @key      : the kernel parameters will be configured without the "lxc.sysctl" prefix
 130  * @value    : the value to set
 131  */
 132 struct lxc_sysctl {
 133         char *key;
 134         char *value;
 135         struct list_head head;
 136 };
 137
 138 static void free_lxc_sysctl(struct lxc_sysctl *ptr)
 139 {
 140         if (ptr) {
 141                 free(ptr->key);
 142                 free(ptr->value);
 143                 free_disarm(ptr);
 144         }
 145 }
 146 define_cleanup_function(struct lxc_sysctl *, free_lxc_sysctl);
 147
 148 /*
 149  * Defines a structure to configure proc filesystem at runtime.
 150  * @filename : the proc filesystem will be configured without the "lxc.proc" prefix
 151  * @value    : the value to set
 152  */
 153 struct lxc_proc {
 154         char *filename;
 155         char *value;
 156         struct list_head head;
 157 };
 158
 159 static void free_lxc_proc(struct lxc_proc *ptr)
 160 {
 161         if (ptr) {
 162                 free(ptr->filename);
 163                 free(ptr->value);
 164                 free_disarm(ptr);
 165         }
 166 }
 167 define_cleanup_function(struct lxc_proc *, free_lxc_proc);
 168
 169 /*
 170  * id_map is an id map entry.  Form in confile is:
 171  * lxc.idmap = u 0    9800 100
 172  * lxc.idmap = u 1000 9900 100
 173  * lxc.idmap = g 0    9800 100
 174  * lxc.idmap = g 1000 9900 100
 175  * meaning the container can use uids and gids 0-99 and 1000-1099,
 176  * with [ug]id 0 mapping to [ug]id 9800 on the host, and [ug]id 1000 to
 177  * [ug]id 9900 on the host.
 178  */
 179 struct id_map {
 180         enum idtype idtype;
 181         unsigned long hostid, nsid, range;
 182         struct list_head head;
 183 };
 184
 185 /* Defines the number of tty configured and contains the
 186  * instantiated ptys
 187  * @max = number of configured ttys
 188  */
 189 struct lxc_tty_info {
 190         size_t max;
 191         char *dir;
 192         char *tty_names;
 193         struct lxc_terminal_info *tty;
 194 };
 195
 196 typedef enum lxc_mount_options_t {
 197         LXC_MOUNT_CREATE_DIR    = 0,
 198         LXC_MOUNT_CREATE_FILE   = 1,
 199         LXC_MOUNT_OPTIONAL      = 2,
 200         LXC_MOUNT_RELATIVE      = 3,
 201         LXC_MOUNT_IDMAP         = 4,
 202         LXC_MOUNT_MAX           = 5,
 203 } lxc_mount_options_t;
 204
 205 __hidden extern const char *lxc_mount_options_info[LXC_MOUNT_MAX];
 206
 207 struct lxc_mount_options {
 208         unsigned int create_dir : 1;
 209         unsigned int create_file : 1;
 210         unsigned int optional : 1;
 211         unsigned int relative : 1;
 212         unsigned int bind_recursively : 1;
 213         unsigned int propagate_recursively : 1;
 214         unsigned int bind : 1;
 215         char userns_path[PATH_MAX];
 216         unsigned long mnt_flags;
 217         unsigned long prop_flags;
 218         char *data;
 219         struct lxc_mount_attr attr;
 220         char *raw_options;
 221 };
 222
 223 /* Defines a structure to store the rootfs location, the
 224  * optionals pivot_root, rootfs mount paths
 225  * @path         : the rootfs source (directory or device)
 226  * @mount        : where it is mounted
 227  * @buf          : static buffer to construct paths
 228  * @bev_type     : optional backing store type
 229  * @managed      : whether it is managed by LXC
 230  * @dfd_mnt      : fd for @mount
 231  * @dfd_dev : fd for /dev of the container
 232  */
 233 struct lxc_rootfs {
 234         int dfd_host;
 235
 236         char *path;
 237         int fd_path_pin;
 238         int dfd_idmapped;
 239
 240         int dfd_mnt;
 241         char *mount;
 242
 243         int dfd_dev;
 244
 245         char buf[PATH_MAX];
 246         char *bdev_type;
 247         bool managed;
 248         struct lxc_mount_options mnt_opts;
 249         struct lxc_storage *storage;
 250 };
 251
 252 /*
 253  * Automatic mounts for LXC to perform inside the container
 254  */
 255 enum {
 256         LXC_AUTO_PROC_RW              = 0x001, /* /proc read-write */
 257         LXC_AUTO_PROC_MIXED           = 0x002, /* /proc/sys and /proc/sysrq-trigger read-only */
 258         LXC_AUTO_PROC_MASK            = 0x003,
 259
 260         LXC_AUTO_SYS_RW               = 0x004, /* /sys */
 261         LXC_AUTO_SYS_RO               = 0x008, /* /sys read-only */
 262         LXC_AUTO_SYS_MIXED            = 0x00C, /* /sys read-only and /sys/class/net read-write */
 263         LXC_AUTO_SYS_MASK             = 0x00C,
 264
 265         LXC_AUTO_CGROUP_RO            = 0x010, /* /sys/fs/cgroup (partial mount, read-only) */
 266         LXC_AUTO_CGROUP_RW            = 0x020, /* /sys/fs/cgroup (partial mount, read-write) */
 267         LXC_AUTO_CGROUP_MIXED         = 0x030, /* /sys/fs/cgroup (partial mount, paths r/o, cgroup r/w) */
 268         LXC_AUTO_CGROUP_FULL_RO       = 0x040, /* /sys/fs/cgroup (full mount, read-only) */
 269         LXC_AUTO_CGROUP_FULL_RW       = 0x050, /* /sys/fs/cgroup (full mount, read-write) */
 270         LXC_AUTO_CGROUP_FULL_MIXED    = 0x060, /* /sys/fs/cgroup (full mount, parent r/o, own r/w) */
 271         /*
 272          * These are defined in such a way as to retain binary compatibility
 273          * with earlier versions of this code. If the previous mask is applied,
 274          * both of these will default back to the _MIXED variants, which is
 275          * safe.
 276          */
 277         LXC_AUTO_CGROUP_NOSPEC        = 0x0B0, /* /sys/fs/cgroup (partial mount, r/w or mixed, depending on caps) */
 278         LXC_AUTO_CGROUP_FULL_NOSPEC   = 0x0E0, /* /sys/fs/cgroup (full mount, r/w or mixed, depending on caps) */
 279         LXC_AUTO_CGROUP_FORCE         = 0x100, /* mount cgroups even when cgroup namespaces are supported */
 280         LXC_AUTO_CGROUP_MASK          = 0x1F0, /* all known cgroup options */
 281
 282         LXC_AUTO_SHMOUNTS             = 0x200, /* shared mount point */
 283         LXC_AUTO_SHMOUNTS_MASK        = 0x200, /* shared mount point mask */
 284         LXC_AUTO_ALL_MASK             = 0x1FF, /* all known settings */
 285 };
 286
 287 enum lxchooks {
 288         LXCHOOK_PRESTART,
 289         LXCHOOK_PREMOUNT,
 290         LXCHOOK_MOUNT,
 291         LXCHOOK_AUTODEV,
 292         LXCHOOK_START,
 293         LXCHOOK_STOP,
 294         LXCHOOK_POSTSTOP,
 295         LXCHOOK_CLONE,
 296         LXCHOOK_DESTROY,
 297         LXCHOOK_START_HOST,
 298         NUM_LXC_HOOKS
 299 };
 300
 301 __hidden extern char *lxchook_names[NUM_LXC_HOOKS];
 302
 303 struct lxc_state_client {
 304         int clientfd;
 305         lxc_state_t states[MAX_STATE];
 306         struct list_head head;
 307 };
 308
 309 typedef enum lxc_bpf_devices_rule_t {
 310         LXC_BPF_DEVICE_CGROUP_ALLOWLIST         = 0,
 311         LXC_BPF_DEVICE_CGROUP_DENYLIST          = 1,
 312 } lxc_bpf_devices_rule_t;
 313
 314 struct device_item {
 315         char type;
 316         int major;
 317         int minor;
 318         char access[4];
 319         int allow;
 320         struct list_head head;
 321 };
 322
 323 struct bpf_devices {
 324         lxc_bpf_devices_rule_t list_type;
 325         struct list_head devices;
 326 };
 327
 328 struct timens_offsets {
 329         /* Currently, either s_boot or ns_boot is set, but not both. */
 330         int64_t s_boot;
 331         int64_t ns_boot;
 332
 333         /* Currently, either s_monotonic or ns_monotonic is set, but not both. */
 334         int64_t s_monotonic;
 335         int64_t ns_monotonic;
 336 };
 337
 338 struct environment_entry {
 339         char *key;
 340         char *val;
 341         struct list_head head;
 342 };
 343
 344 struct cap_entry {
 345         char *cap_name;
 346         int cap;
 347         struct list_head head;
 348 };
 349
 350 struct caps {
 351         int keep;
 352         struct list_head list;
 353 };
 354
 355 struct string_entry {
 356         char *val;
 357         struct list_head head;
 358 };
 359
 360 struct lxc_conf {
 361         /* Pointer to the name of the container. Do not free! */
 362         const char *name;
 363         bool is_execute;
 364         int reboot;
 365         personality_t personality;
 366         struct utsname *utsname;
 367
 368         struct {
 369                 struct list_head cgroup;
 370                 struct list_head cgroup2;
 371                 struct bpf_devices bpf_devices;
 372         };
 373
 374         struct {
 375                 struct list_head id_map;
 376
 377                 /*
 378                  * Pointer to the idmap entry for the container's root uid in
 379                  * the id_map list. Do not free!
 380                  */
 381                 const struct id_map *root_nsuid_map;
 382
 383                 /*
 384                  * Pointer to the idmap entry for the container's root gid in
 385                  * the id_map list. Do not free!
 386                  */
 387                 const struct id_map *root_nsgid_map;
 388         };
 389
 390         struct list_head netdevs;
 391
 392         struct {
 393                 char *fstab;
 394                 int auto_mounts;
 395                 struct list_head mount_entries;
 396         };
 397
 398         struct caps caps;
 399
 400         /* /dev/tty<idx> devices */
 401         struct lxc_tty_info ttys;
 402         /* /dev/console device */
 403         struct lxc_terminal console;
 404         /* maximum pty devices allowed by devpts mount */
 405         size_t pty_max;
 406         /* file descriptor for the container's /dev/pts mount */
 407         int devpts_fd;
 408
 409         /* set to true when rootfs has been setup */
 410         bool rootfs_setup;
 411         struct lxc_rootfs rootfs;
 412
 413         bool close_all_fds;
 414
 415         struct {
 416                 unsigned int hooks_version;
 417                 struct list_head hooks[NUM_LXC_HOOKS];
 418         };
 419
 420         char *lsm_aa_profile;
 421         char *lsm_aa_profile_computed;
 422         bool lsm_aa_profile_created;
 423         unsigned int lsm_aa_allow_nesting;
 424         unsigned int lsm_aa_allow_incomplete;
 425         struct list_head lsm_aa_raw;
 426         char *lsm_se_context;
 427         char *lsm_se_keyring_context;
 428         bool keyring_disable_session;
 429         bool transient_procfs_mnt;
 430         struct lxc_seccomp seccomp;
 431         int maincmd_fd;
 432         unsigned int autodev;  /* if 1, mount and fill a /dev at start */
 433         int autodevtmpfssize; /* size of the /dev tmpfs */
 434         int haltsignal; /* signal used to halt container */
 435         int rebootsignal; /* signal used to reboot container */
 436         int stopsignal; /* signal used to hard stop container */
 437         char *rcfile;   /* Copy of the top level rcfile we read */
 438
 439         /* Logfile and loglevel can be set in a container config file. Those
 440          * function as defaults. The defaults can be overridden by command line.
 441          * However we don't want the command line specified values to be saved
 442          * on c->save_config(). So we store the config file specified values
 443          * here. */
 444         char *logfile; /* the logfile as specified in config */
 445         int loglevel; /* loglevel as specified in config (if any) */
 446         int logfd;
 447
 448         unsigned int start_auto;
 449         unsigned int start_delay;
 450         int start_order;
 451         struct list_head groups;
 452         int nbd_idx;
 453
 454         /* unshare the mount namespace in the monitor */
 455         unsigned int monitor_unshare;
 456         unsigned int monitor_signal_pdeath;
 457
 458         /* list of environment variables we'll add to the container when
 459          * started */
 460         struct list_head environment;
 461
 462         /* text representation of the config file */
 463         char *unexpanded_config;
 464         size_t unexpanded_len;
 465         size_t unexpanded_alloced;
 466
 467         /* default command for lxc-execute */
 468         char *execute_cmd;
 469
 470         /* init command */
 471         char *init_cmd;
 472
 473         /* The uid to use for the container. */
 474         uid_t init_uid;
 475         /* The gid to use for the container. */
 476         gid_t init_gid;
 477         /* The groups to use for the container. */
 478         lxc_groups_t init_groups;
 479
 480         /* indicator if the container will be destroyed on shutdown */
 481         unsigned int ephemeral;
 482
 483         /* The facility to pass to syslog. Let's users establish as what type of
 484          * program liblxc is supposed to write to the syslog. */
 485         char *syslog;
 486
 487         /* Whether PR_SET_NO_NEW_PRIVS will be set for the container. */
 488         bool no_new_privs;
 489
 490         /* RLIMIT_* limits */
 491         struct list_head limits;
 492
 493         /* Contains generic info about the cgroup configuration for this
 494          * container. Note that struct lxc_cgroup contains a union. It is only
 495          * valid to access the members of the anonymous "meta" struct within
 496          * that union.
 497          */
 498         struct lxc_cgroup cgroup_meta;
 499
 500         struct {
 501                 int ns_clone;
 502                 int ns_keep;
 503                 char *ns_share[LXC_NS_MAX];
 504         };
 505
 506         /* init working directory */
 507         char *init_cwd;
 508
 509         /* A list of clients registered to be informed about a container state. */
 510         struct list_head state_clients;
 511
 512         /* sysctls */
 513         struct list_head sysctls;
 514
 515         /* procs */
 516         struct list_head procs;
 517
 518         struct shmount {
 519                 /* Absolute path to the shared mount point on the host */
 520                 char *path_host;
 521                 /* Absolute path (in the container) to the shared mount point */
 522                 char *path_cont;
 523         } shmount;
 524
 525         struct timens_offsets timens;
 526
 527         bool sched_core;
 528         __u64 sched_core_cookie;
 529 };
 530
 531 __hidden extern int write_id_mapping(enum idtype idtype, pid_t pid, const char *buf, size_t buf_size)
 532     __access_r(3, 4);
 533
 534 extern thread_local struct lxc_conf *current_config;
 535
 536 __hidden extern int run_lxc_hooks(const char *name, char *hook, struct lxc_conf *conf, char *argv[]);
 537 __hidden extern struct lxc_conf *lxc_conf_init(void);
 538 __hidden extern void lxc_conf_free(struct lxc_conf *conf);
 539 __hidden extern int lxc_storage_prepare(struct lxc_conf *conf);
 540 __hidden extern int lxc_rootfs_prepare(struct lxc_conf *conf, bool userns);
 541 __hidden extern void lxc_storage_put(struct lxc_conf *conf);
 542 __hidden extern int lxc_rootfs_init(struct lxc_conf *conf, bool userns);
 543 __hidden extern int lxc_rootfs_prepare_parent(struct lxc_handler *handler);
 544 __hidden extern int lxc_idmapped_mounts_parent(struct lxc_handler *handler);
 545 __hidden extern int lxc_map_ids(struct list_head *idmap, pid_t pid);
 546 __hidden extern int lxc_create_tty(const char *name, struct lxc_conf *conf);
 547 __hidden extern void lxc_delete_tty(struct lxc_tty_info *ttys);
 548 __hidden extern int lxc_clear_config_caps(struct lxc_conf *c);
 549 __hidden extern int lxc_clear_cgroups(struct lxc_conf *c, const char *key, int version);
 550 __hidden extern int lxc_clear_mount_entries(struct lxc_conf *c);
 551 __hidden extern int lxc_clear_automounts(struct lxc_conf *c);
 552 __hidden extern int lxc_clear_hooks(struct lxc_conf *c, const char *key);
 553 __hidden extern int lxc_clear_idmaps(struct lxc_conf *c);
 554 __hidden extern int lxc_clear_groups(struct lxc_conf *c);
 555 __hidden extern int lxc_clear_environment(struct lxc_conf *c);
 556 __hidden extern int lxc_clear_limits(struct lxc_conf *c, const char *key);
 557 __hidden extern int lxc_delete_autodev(struct lxc_handler *handler);
 558 __hidden extern int lxc_clear_autodev_tmpfs_size(struct lxc_conf *c);
 559 __hidden extern int lxc_setup_rootfs_prepare_root(struct lxc_conf *conf, const char *name,
 560                                                   const char *lxcpath);
 561 __hidden extern int lxc_setup(struct lxc_handler *handler);
 562 __hidden extern int lxc_setup_parent(struct lxc_handler *handler);
 563 __hidden extern int setup_resource_limits(struct lxc_conf *conf, pid_t pid);
 564 __hidden extern int find_unmapped_nsid(const struct lxc_conf *conf, enum idtype idtype);
 565 __hidden extern int mapped_hostid(unsigned id, const struct lxc_conf *conf, enum idtype idtype);
 566 __hidden extern int userns_exec_1(const struct lxc_conf *conf, int (*fn)(void *), void *data,
 567                                   const char *fn_name);
 568 __hidden extern int userns_exec_full(struct lxc_conf *conf, int (*fn)(void *), void *data,
 569                                      const char *fn_name);
 570 __hidden extern int parse_mntopts_legacy(const char *mntopts, unsigned long *mntflags, char **mntdata);
 571 __hidden extern int parse_propagationopts(const char *mntopts, unsigned long *pflags);
 572 __hidden extern int parse_lxc_mount_attrs(struct lxc_mount_options *opts, char *mnt_opts);
 573 __hidden extern int parse_mount_attrs(struct lxc_mount_options *opts, const char *mntopts);
 574 __hidden extern void tmp_proc_unmount(struct lxc_conf *lxc_conf);
 575 __hidden extern void suggest_default_idmap(void);
 576 __hidden extern FILE *make_anonymous_mount_file(const struct list_head *mount,
 577                                                 bool include_nesting_helpers);
 578 __hidden extern int run_script(const char *name, const char *section, const char *script, ...);
 579 __hidden extern int run_script_argv(const char *name, unsigned int hook_version, const char *section,
 580                                     const char *script, const char *hookname, char **argsin);
 581
 582 __hidden extern bool has_cap(int cap, struct lxc_conf *conf);
 583 static inline bool lxc_wants_cap(int cap, struct lxc_conf *conf)
 584 {
 585         if (lxc_caps_last_cap() < cap)
 586                 return false;
 587
 588         return has_cap(cap, conf);
 589 }
 590
 591 __hidden extern int setup_sysctl_parameters(struct lxc_conf *conf);
 592 __hidden extern int lxc_clear_sysctls(struct lxc_conf *c, const char *key);
 593 __hidden extern int setup_proc_filesystem(struct lxc_conf *conf, pid_t pid);
 594 __hidden extern int lxc_clear_procs(struct lxc_conf *c, const char *key);
 595 __hidden extern int lxc_clear_apparmor_raw(struct lxc_conf *c);
 596 __hidden extern int lxc_clear_namespace(struct lxc_conf *c);
 597 __hidden extern int userns_exec_minimal(const struct lxc_conf *conf, int (*fn_parent)(void *),
 598                                         void *fn_parent_data, int (*fn_child)(void *),
 599                                         void *fn_child_data);
 600 __hidden extern int userns_exec_mapped_root(const char *path, int path_fd,
 601                                             const struct lxc_conf *conf);
 602 static inline int chown_mapped_root(const char *path, const struct lxc_conf *conf)
 603 {
 604         return userns_exec_mapped_root(path, -EBADF, conf);
 605 }
 606
 607 __hidden extern int lxc_sync_fds_parent(struct lxc_handler *handler);
 608 __hidden extern int lxc_sync_fds_child(struct lxc_handler *handler);
 609
 610 static inline const char *get_rootfs_mnt(const struct lxc_rootfs *rootfs)
 611 {
 612         static const char *s = "/";
 613
 614         return !is_empty_string(rootfs->path) ? rootfs->mount : s;
 615 }
 616
 617 static inline void put_lxc_mount_options(struct lxc_mount_options *mnt_opts)
 618 {
 619         mnt_opts->create_dir = 0;
 620         mnt_opts->create_file = 0;
 621         mnt_opts->optional = 0;
 622         mnt_opts->relative = 0;
 623         mnt_opts->userns_path[0] = '\0';
 624         mnt_opts->mnt_flags = 0;
 625         mnt_opts->prop_flags = 0;
 626
 627         free_disarm(mnt_opts->data);
 628         free_disarm(mnt_opts->raw_options);
 629 }
 630
 631 static inline void put_lxc_rootfs(struct lxc_rootfs *rootfs, bool unpin)
 632 {
 633         if (rootfs) {
 634                 close_prot_errno_disarm(rootfs->dfd_host);
 635                 close_prot_errno_disarm(rootfs->dfd_mnt);
 636                 close_prot_errno_disarm(rootfs->dfd_dev);
 637                 if (unpin)
 638                         close_prot_errno_disarm(rootfs->fd_path_pin);
 639                 close_prot_errno_disarm(rootfs->dfd_idmapped);
 640                 put_lxc_mount_options(&rootfs->mnt_opts);
 641                 storage_put(rootfs->storage);
 642                 rootfs->storage = NULL;
 643         }
 644 }
 645
 646 static inline void lxc_clear_cgroup2_devices(struct bpf_devices *bpf_devices)
 647 {
 648         struct device_item *device, *n;
 649
 650         list_for_each_entry_safe(device, n, &bpf_devices->devices, head)
 651                 list_del(&device->head);
 652
 653         INIT_LIST_HEAD(&bpf_devices->devices);
 654 }
 655
 656 static inline int lxc_personality(personality_t persona)
 657 {
 658         if (persona < 0)
 659                 return ret_errno(EINVAL);
 660
 661         return personality(persona);
 662 }
 663
 664 __hidden extern int lxc_set_environment(const struct lxc_conf *conf);
 665 __hidden extern int parse_cap(const char *cap);
 666
 667 #endif /* __LXC_CONF_H */