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lve-ctl.h
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#ifndef _LVE_CTL_H_ #define _LVE_CTL_H_ #include <stdlib.h> #include <stdint.h> #include <string.h> #ifndef _LVE_TYPE_H_ #include "lve-type.h" #endif #define LIBLVE_API_MAJOR 1 #define LIBLVE_API_MINOR 5 #define SIZEOF_LIBLVE (sizeof(void *) + sizeof(void *) + sizeof(int)) struct liblve; /** * initializes and create instance of LVE * args * allocator - pointer to function to allocate memory * returns * NULL on error, errno will be set. * errno will be EINVAL if wrong version of library is used * liblve otherwise */ struct liblve *init_lve(liblve_alloc alloc, liblve_free free); static inline struct liblve *init_lve_generic() { return init_lve(malloc, free); } /** * destroy lve library instance * args: * lve = instantiated liblive instance * return 0 on success * negative number on error. errno will be set */ int destroy_lve(struct liblve *lve); /** * enter a light virutal environment * args: * lve = fully initialized liblve instance * lve_id = id associated with LVE * cookie = pointer to cookie, which is returned if the task * is correctly migrated into LVE and used to exit from this LVE * return codes: * 0 = on success, negative number means error: * -EPERM - don't have permission to call, or called from outside root LVE * -ENOMEM - there's not enough memory to allocate a new LVE * -EFAULT - cookie is a bad pointer */ int lve_enter_flags(struct liblve *lve, uint32_t lve_id, uint32_t *cookie, enum liblve_enter_flags flags); /** * enter lve namespace and get a copy of the original fs * args: * lve = fully initialized liblve instance * return codes: * -EINVAL - the caller hasn't entered an lve */ int lve_enter_fs(struct liblve *lve); /** * exit from virtual environment, same as lve_leave * args: * lve = fully init liblve instance * cookie - pointer to cookie returned from lve_enter * return codes: * 0 = none error, all less zero is errors: * -ESRCH = task not in virutal environment * -EFAULT = bad cookie pointer * -EINVAL = cookie not match to stored in context */ int lve_exit(struct liblve *lve, uint32_t *cookie); int lve_setup_enter(struct liblve *lve, uint32_t ve_id, struct liblve_settings *set, uint32_t *cookie, enum liblve_enter_flags flags); /** * @brief Checks whether a current task has reached its limits. * * This call retrieve set of liblve_ve_fails flags, each of them * represents resource which allocation failed. This flags combined * via bitwise or returns through failmask parameter. Flags are * cleared after this call. * * @param lve - fully initialized liblve instance. * @param failmask - pointer to variable where fail mask will be stored. * @retval 0 success. * @retval -ESRCH task not in virutal environment. * @retval -EFAULT bad failmask pointer. */ int lve_check_fault(struct liblve *lve, uint32_t * failmask); #ifdef LVE_DEPRICATED #warning you need remove old functions static inline int lve_is_available(void) { struct liblve *lve; lve = init_lve(malloc, free); if (lve == NULL) return 0; destroy_lve(lve); return 1; } static inline int lve_instance_init(struct liblve *lve) { struct liblve *tmp; if (lve == NULL) return SIZEOF_LIBLVE; tmp = init_lve(malloc, NULL); if (tmp == NULL) return -1; memcpy(lve, tmp, SIZEOF_LIBLVE); free(tmp); return 0; } static inline int lve_instance_destroy(struct liblve *lve) { return destroy_lve(lve); } #define __unused __attribute__((unused)) static inline int lve_enter(struct liblve *lve, uint32_t ve_id, __unused int32_t uid, __unused int32_t gid, uint32_t *cookie) { return lve_enter_flags(lve, ve_id, cookie, 0); } static inline int lve_leave(struct liblve *lib, uint32_t *cookie) { return lve_exit(lib, cookie); } #endif /** * Return 1 if process in lve context * return * 1 - process is in lve context * 0 - process is not in lve context */ int is_in_lve(struct liblve *lve); /** * return actual api version used to communicate with kernel * in format major << 16 | minor */ uint32_t lve_kapi_ver(struct liblve *lve); /** * return actual liblve api version used to communicate with * userland application * return in format major << 16 | minor */ uint32_t lve_get_api_version(void); #ifdef LVE_ADMIN /** * create custom configured virtual enviroment * args: * ve_id = id associated with VE */ int lve_create(struct liblve *lve, uint32_t lve_id); /** * destroy configured virtual environment * args: * ve_id = id associated with VE */ int lve_destroy(struct liblve *lve, uint32_t lve_id); /** * adjust parameters for virtual environment * args: * ve_id = id associated with VE */ int lve_setup(struct liblve *lve, uint32_t lve_id, struct liblve_settings *set); /** * flush context's from kernel * args * all == true - is need all context flushed, or only default * configured * return * */ int lve_flush(struct liblve *lve, int all); /** * get info about context * args * ve_id = id associated with VE * cpu - pointer to return CPU power. * io - pointer to IO priority. * return * 0 - OK * any negative value say error is hit. */ int lve_info(struct liblve *lve, uint32_t ve_id, struct liblve_info *set); int lve_setup_flags(struct liblve *lve, uint32_t ve_id, enum liblve_ve_flags); /** * migrate existent process into container * * args * ve_id = container id to migrate * pid = process id to migrate * return * 0 - OK * any negative value say error is hit. */ int lve_enter_pid(struct liblve *lve, uint32_t ve_id, pid_t pid); /** * migrate existent process into container with flags * * args * ve_id = container id to migrate * pid = process id to migrate * flags = flag set, see lve_enter * return * 0 - OK * < 0 - for -errno. */ int lve_enter_pid_flags(struct liblve *lve, uint32_t ve_id, pid_t pid, uint32_t flags); /** * migrate existent process from container * * args * pid = process id to migrate * return * 0 - OK * any negative value say error is hit. */ int lve_leave_pid(struct liblve *lve, pid_t pid); /** * Set up the lve module * returns * 0 on success * -errno on error */ int lve_start(struct liblve *lve); /** * Set fail injection place */ int lve_set_fail_val(struct liblve *lve, uint32_t fail_val); /** * enter lve namespace and get the ORIGINAL fs * any changes to cwd/root will be applied to all * following namespace guests * args: * lve = fully initialized liblve instance * \retval * -EPERM - the call is not permitted * -EINVAL - the caller hasn't entered an lve */ int lve_setup_fs(struct liblve *lve); /** * set lve root mount tree. * args * lve = fully initialized liblve instance * lve_id = lve identiferer to be root changed * * \retval */ int lve_set_root(struct liblve *lve, uint32_t lve_id, const char *root); /** * take current NS and FS settrigs as default for lve. * args * lve = fully initialized liblve instance * lve_id = lve identifer to need assign an NS * \retval * */ int lve_assign_ns(struct liblve *lve, uint32_t lve_id); /** * set lve global parameter value * args * lve = fully initialized liblve instance * param parameter id * val = parameter value * \retval */ int lve_set_global_param(struct liblve *lve, enum liblve_global_params param, uint64_t val); /** * get lve global parameter value * args * lve = fully initialized liblve instance * param parameter id * val = parameter value * \retval */ int lve_get_global_param(struct liblve *lve, enum liblve_global_params param, uint64_t *val); /** * get lve info by task pid * args * lve = fully initialized liblve instance * pid = task PID * info = pointer where to put info * \retval */ int lve_get_pid_info(struct liblve *lve, pid_t pid, struct liblve_pid_info *info); /** * TCP port bind control * args * lve = fully initialized liblve instance * * \retval */ /* helpers */ int lve_net_port_add(struct liblve *lve, uint32_t lve_id, uint16_t port, bool policy); int lve_net_port_del(struct liblve *lve, uint32_t lve_id, uint16_t port); int lve_net_port_def(struct liblve *lve, uint32_t lve_id, bool policy); /** * set network limits * args * lve = fully initialized liblve instance * net_limits = uid/port pair * \retval */ int lve_set_net_limits(struct liblve *lve, uint32_t lve_id, struct liblve_net_limits *net_limits); /** * control freezer * args * lve = fully initialized liblve instance * fc = arguments passed to the freezer * \retval */ int lve_freezer_control(struct liblve *lve, uint32_t lve_id, struct liblve_freezer_control *fc); /** * create 2nd level lvp * args * lve = fully initialized liblve instance * lvp_id = lvp identifier */ int lve_lvp_create(struct liblve *lve, uint32_t lvp_id); /** * create a nested LVP under a parent LVP * args * lve = fully initialized liblve instance * lvp_id = new lvp identifier * parent_lvp_id = parent lvp identifier (0 for root) */ int lve_lvp_create2(struct liblve *lve, uint32_t lvp_id, uint32_t parent_lvp_id); /** * adjust parameters for virtual environment * args: * lve = initialized liblve entity * set = default parameters settings * lvp_id = id associated with resseler */ int lve_lvp_setup(struct liblve *lve, uint32_t lvp_id, enum lvp_set_type op, struct liblve_settings *set); /** * destroy 2nd level lvp * args * lve = fully initialized liblve instance * lvp_id - lvp identifier */ int lve_lvp_destroy(struct liblve *lve, uint32_t lvp_id); /* create a mapping between lve and lvp */ int lve_lvp_map(struct liblve *lve, uint32_t lve_id, uint32_t lvp_id); /** * move lvp to the different reseller */ int lve_lvp_move(struct liblve *lve, uint32_t lve_id, uint32_t lvp_id); /** * read lvp limits */ int lve_lvp_info(struct liblve *lve, uint32_t lvp_id, enum lvp_set_type op, struct liblve_info *set); #endif struct passwd; /** * CageFS definitions */ #include <sys/types.h> #include <pwd.h> #define SECURELVE_JAIL "/usr/share/cagefs-skeleton" #define SECURELVE_BASEDIR "/var/cagefs/" #define SECURELVE_SHELL "/usr/sbin/securelve_sh" /* deprecated */ #define SECURELVE_ETC_MP_FILE "/etc/cagefs/cagefs.mp" #define SECURELVE_MP_FILE "/usr/share/cagefs/cagefs.mp.work" /* deprecated */ #define SECURELVE_CONFIG_DIR "/etc/cagefs" #define SECURELVE_MIN_UID 500 #define SECURELVE_MIN_UID_FILENAME "/etc/cagefs/cagefs.min.uid" #define HOME_REGEX_FILE "/etc/cagefs/cagefs.base.home.dirs" #define DISABLE_HOME_DIRS_SEARCH "/etc/cagefs/disable.home.dirs.search" #define DEV_SHM_OPTIONS "/etc/cagefs/dev.shm.options" /* Max count of regular expressions */ #define MAX_REXPS 100 #define DISABLE_ETCFS "/etc/cagefs/etc.safe/disable.etcfs" #define PGSQL_SOCKET_CFG "/usr/share/cagefs/pgsql.socket.name" #define MYSQL_SOCKET_CFG "/usr/share/cagefs/mysql.socket.name" #define CL_SOLO "/etc/cloudlinux-edition-solo" #define CL_CONTAINER "/etc/cloudlinux-container" #define FEATURE_AVAIL_FLAG_DISABLE_RESTRICT_CAPS "/opt/cloudlinux/flags/available-flags.d/disable-cagefs-restricted-caps.flag" #define FEATURE_ENABLE_FLAG_DISABLE_RESTRICT_CAPS "/opt/cloudlinux/flags/enabled-flags.d/disable-cagefs-restricted-caps.flag" #define FEATURE_AVAIL_FLAG_DISABLE_NO_NEW_PRIVS "/opt/cloudlinux/flags/available-flags.d/disable-cagefs-no-new-privs.flag" #define FEATURE_ENABLE_FLAG_DISABLE_NO_NEW_PRIVS "/opt/cloudlinux/flags/enabled-flags.d/disable-cagefs-no-new-privs.flag" /* Function reads MIN UID value from file Returns -1 if error has occured */ int read_min_uid(unsigned int *min_uid, char *error_str); /** * puts user in CageFS (jail) * return 1 if succesful, -1 if error, 0 if CageFS is disabled */ int jail(struct passwd *pw, char * error_str); int lve_jail(struct passwd *pw, char * error_str); int lve_jail_uid(struct passwd *pw, unsigned int min_uid, char *error_str); /** * A variant of the 'jail' function, but with additional enhancements: * - allows LVE ID an to be passed as an argument, i.e. not be equal to user's UID. * - allows flags to be passed to modify the behavior of the jail. */ int jail_enhanced(struct passwd * pw, uint32_t lve_id, uint32_t flags, char *error_str); /** * setup namespace for CageFS (jail) * return 1 if succesful, -1 if error, 0 if CageFS is disabled */ int lve_namespace_setup(uint32_t lve_id); /* mount personal user's directories in CageFS */ int mount_jail(const char *homedir, const char *username, const char *basedir, const char *jaildir, char *error_str, uid_t uid, gid_t gid); /* helper function to strip slash in the end of path */ void strip_slash(char *str); // Returns zero on success, or -1 if an error occurred int make_dir(const char *target, mode_t mode, int make_parents, char *error_str); int print_error(char *str, int err, const char *format, ...); #endif