/* SPDX-License-Identifier: LGPL-2.1-or-later */ /* * mountP.h - private library header file * * This file is part of libmount from util-linux project. * * Copyright (C) 2008-2018 Karel Zak * * libmount 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. */ #ifndef _LIBMOUNT_PRIVATE_H #define _LIBMOUNT_PRIVATE_H #include #include #include #include #include #include #include #include #include #include "c.h" #include "list.h" #include "debug.h" #include "buffer.h" #include "libmount.h" /* * Debug */ #define MNT_DEBUG_HELP (1 << 0) #define MNT_DEBUG_INIT (1 << 1) #define MNT_DEBUG_CACHE (1 << 2) #define MNT_DEBUG_OPTIONS (1 << 3) #define MNT_DEBUG_LOCKS (1 << 4) #define MNT_DEBUG_TAB (1 << 5) #define MNT_DEBUG_FS (1 << 6) #define MNT_DEBUG_UPDATE (1 << 7) #define MNT_DEBUG_UTILS (1 << 8) #define MNT_DEBUG_CXT (1 << 9) #define MNT_DEBUG_DIFF (1 << 10) #define MNT_DEBUG_MONITOR (1 << 11) #define MNT_DEBUG_BTRFS (1 << 12) #define MNT_DEBUG_LOOP (1 << 13) #define MNT_DEBUG_VERITY (1 << 14) #define MNT_DEBUG_HOOK (1 << 15) #define MNT_DEBUG_OPTLIST (1 << 16) #define MNT_DEBUG_ALL 0xFFFFFF UL_DEBUG_DECLARE_MASK(libmount); #define DBG(m, x) __UL_DBG(libmount, MNT_DEBUG_, m, x) #define ON_DBG(m, x) __UL_DBG_CALL(libmount, MNT_DEBUG_, m, x) #define DBG_FLUSH __UL_DBG_FLUSH(libmount, MNT_DEBUG_) #define UL_DEBUG_CURRENT_MASK UL_DEBUG_MASK(libmount) #include "debugobj.h" /* * NLS -- the library has to be independent on main program, so define * UL_TEXTDOMAIN_EXPLICIT before you include nls.h. * * Now we use util-linux.po (=PACKAGE), rather than maintain the texts * in the separate libmount.po file. */ #define LIBMOUNT_TEXTDOMAIN PACKAGE #define UL_TEXTDOMAIN_EXPLICIT LIBMOUNT_TEXTDOMAIN #include "nls.h" /* extension for files in the directory */ #define MNT_MNTTABDIR_EXT ".fstab" /* library private paths */ #define MNT_RUNTIME_TOPDIR "/run" /* private userspace mount table */ #define MNT_PATH_UTAB MNT_RUNTIME_TOPDIR "/mount/utab" /* temporary mount target */ #define MNT_PATH_TMPTGT MNT_RUNTIME_TOPDIR "/mount/tmptgt" #define MNT_UTAB_HEADER "# libmount utab file\n" #ifdef TEST_PROGRAM struct libmnt_test { const char *name; int (*body)(struct libmnt_test *ts, int argc, char *argv[]); const char *usage; }; /* test.c */ extern int mnt_run_test(struct libmnt_test *tests, int argc, char *argv[]); #endif /* utils.c */ extern int mnt_valid_tagname(const char *tagname); extern const char *mnt_statfs_get_fstype(struct statfs *vfs); extern int is_file_empty(const char *name); extern int mnt_is_readonly(const char *path) __attribute__((nonnull)); extern int mnt_parse_offset(const char *str, size_t len, uintmax_t *res); extern int mnt_chdir_to_parent(const char *target, char **filename); extern char *mnt_get_username(const uid_t uid); extern int mnt_get_uid(const char *username, uid_t *uid); extern int mnt_get_gid(const char *groupname, gid_t *gid); extern int mnt_parse_uid(const char *user, size_t user_len, uid_t *gid); extern int mnt_parse_gid(const char *group, size_t group_len, gid_t *gid); extern int mnt_parse_mode(const char *mode, size_t mode_len, mode_t *gid); extern int mnt_in_group(gid_t gid); extern int mnt_open_uniq_filename(const char *filename, char **name); extern int mnt_has_regular_utab(const char **utab, int *writable); extern const char *mnt_get_utab_path(void); extern int mnt_get_filesystems(char ***filesystems, const char *pattern); extern void mnt_free_filesystems(char **filesystems); extern char *mnt_get_kernel_cmdline_option(const char *name); extern int mnt_safe_stat(const char *target, struct stat *st); extern int mnt_safe_lstat(const char *target, struct stat *st); extern int mnt_is_path(const char *target); extern int mnt_tmptgt_unshare(int *old_ns_fd); extern int mnt_tmptgt_cleanup(int old_ns_fd); /* tab.c */ extern int is_mountinfo(struct libmnt_table *tb); extern int mnt_table_set_parser_fltrcb( struct libmnt_table *tb, int (*cb)(struct libmnt_fs *, void *), void *data); extern int __mnt_table_parse_mountinfo(struct libmnt_table *tb, const char *filename, struct libmnt_table *u_tb); extern struct libmnt_fs *mnt_table_get_fs_root(struct libmnt_table *tb, struct libmnt_fs *fs, unsigned long mountflags, char **fsroot); extern int __mnt_table_is_fs_mounted( struct libmnt_table *tb, struct libmnt_fs *fstab_fs, const char *tgt_prefix); extern int mnt_table_enable_noautofs(struct libmnt_table *tb, int ignore); extern int mnt_table_is_noautofs(struct libmnt_table *tb); /* * Generic iterator */ struct libmnt_iter { struct list_head *p; /* current position */ struct list_head *head; /* start position */ int direction; /* MNT_ITER_{FOR,BACK}WARD */ }; #define IS_ITER_FORWARD(_i) ((_i)->direction == MNT_ITER_FORWARD) #define IS_ITER_BACKWARD(_i) ((_i)->direction == MNT_ITER_BACKWARD) #define MNT_ITER_INIT(itr, list) \ do { \ (itr)->p = IS_ITER_FORWARD(itr) ? \ (list)->next : (list)->prev; \ (itr)->head = (list); \ } while(0) #define MNT_ITER_GET_ENTRY(itr, restype, member) \ list_entry((itr)->p, restype, member) #define MNT_ITER_ITERATE(itr) \ do { \ (itr)->p = IS_ITER_FORWARD(itr) ? \ (itr)->p->next : (itr)->p->prev; \ } while(0) /* * This struct represents one entry in a fstab/mountinfo file. * (note that fstab[1] means the first column from fstab, and so on...) */ struct libmnt_fs { struct list_head ents; struct libmnt_table *tab; int refcount; /* reference counter */ unsigned int opts_age; /* to sync with optlist */ struct libmnt_optlist *optlist; int id; /* mountinfo[1]: ID */ int parent; /* mountinfo[2]: parent */ dev_t devno; /* mountinfo[3]: st_dev */ char *bindsrc; /* utab, full path from fstab[1] for bind mounts */ char *source; /* fstab[1], mountinfo[10], swaps[1]: * source dev, file, dir or TAG */ char *tagname; /* fstab[1]: tag name - "LABEL", "UUID", ..*/ char *tagval; /* tag value */ char *root; /* mountinfo[4]: root of the mount within the FS */ char *target; /* mountinfo[5], fstab[2]: mountpoint */ char *fstype; /* mountinfo[9], fstab[3]: filesystem type */ char *optstr; /* fstab[4], merged options */ char *vfs_optstr; /* mountinfo[6]: fs-independent (VFS) options */ char *opt_fields; /* mountinfo[7]: optional fields */ char *fs_optstr; /* mountinfo[11]: fs-dependent options */ char *user_optstr; /* userspace mount options */ char *attrs; /* mount attributes */ int freq; /* fstab[5]: dump frequency in days */ int passno; /* fstab[6]: pass number on parallel fsck */ /* /proc/swaps */ char *swaptype; /* swaps[2]: device type (partition, file, ...) */ off_t size; /* swaps[3]: swaparea size */ off_t usedsize; /* swaps[4]: used size */ int priority; /* swaps[5]: swap priority */ int flags; /* MNT_FS_* flags */ pid_t tid; /* /proc//mountinfo otherwise zero */ char *comment; /* fstab comment */ void *userdata; /* library independent data */ }; /* * fs flags */ #define MNT_FS_PSEUDO (1 << 1) /* pseudo filesystem */ #define MNT_FS_NET (1 << 2) /* network filesystem */ #define MNT_FS_SWAP (1 << 3) /* swap device */ #define MNT_FS_KERNEL (1 << 4) /* data from /proc/{mounts,self/mountinfo} */ #define MNT_FS_MERGED (1 << 5) /* already merged data from /run/mount/utab */ /* * fstab/mountinfo file */ struct libmnt_table { int fmt; /* MNT_FMT_* file format */ int nents; /* number of entries */ int refcount; /* reference counter */ int comms; /* enable/disable comment parsing */ char *comm_intro; /* First comment in file */ char *comm_tail; /* Last comment in file */ struct libmnt_cache *cache; /* canonicalized paths/tags cache */ int (*errcb)(struct libmnt_table *tb, const char *filename, int line); int (*fltrcb)(struct libmnt_fs *fs, void *data); void *fltrcb_data; int noautofs; /* ignore autofs mounts */ struct list_head ents; /* list of entries (libmnt_fs) */ void *userdata; }; extern struct libmnt_table *__mnt_new_table_from_file(const char *filename, int fmt, int empty_for_enoent); /* * Tab file format */ enum { MNT_FMT_GUESS, MNT_FMT_FSTAB, /* /etc/{fs,m}tab */ MNT_FMT_MTAB = MNT_FMT_FSTAB, /* alias */ MNT_FMT_MOUNTINFO, /* /proc/#/mountinfo */ MNT_FMT_UTAB, /* /run/mount/utab */ MNT_FMT_SWAPS /* /proc/swaps */ }; /* * Context hooks * * TODO: this will be public one day when libmount will support modules for * stuff like veritydev.c. */ enum { MNT_STAGE_PREP_SOURCE = 1, /* mount source preparation */ MNT_STAGE_PREP_TARGET, /* mount target preparation */ MNT_STAGE_PREP_OPTIONS, /* mount options preparation */ MNT_STAGE_PREP, /* all prepared */ MNT_STAGE_MOUNT_PRE = 100, /* before mount */ MNT_STAGE_MOUNT, /* mount(2) or fsmount(2) or tree-clone */ MNT_STAGE_MOUNT_POST, /* after mount */ MNT_STAGE_POST = 200 /* all is done */ }; struct libmnt_hookset { const char *name; /* hook set name */ int firststage; int (*firstcall)(struct libmnt_context *, const struct libmnt_hookset *, void *); int (*deinit)(struct libmnt_context *, const struct libmnt_hookset *); /* cleanup function */ }; /* built-in hooks */ extern const struct libmnt_hookset hookset_mount_legacy; extern const struct libmnt_hookset hookset_mount; extern const struct libmnt_hookset hookset_mkdir; extern const struct libmnt_hookset hookset_subdir; extern const struct libmnt_hookset hookset_owner; extern const struct libmnt_hookset hookset_idmap; extern const struct libmnt_hookset hookset_loopdev; #ifdef HAVE_CRYPTSETUP extern const struct libmnt_hookset hookset_veritydev; #endif #ifdef HAVE_LIBSELINUX extern const struct libmnt_hookset hookset_selinux; #endif extern int mnt_context_deinit_hooksets(struct libmnt_context *cxt); extern const struct libmnt_hookset *mnt_context_get_hookset(struct libmnt_context *cxt, const char *name); extern int mnt_context_set_hookset_data(struct libmnt_context *cxt, const struct libmnt_hookset *hs, void *data); extern void *mnt_context_get_hookset_data(struct libmnt_context *cxt, const struct libmnt_hookset *hs); extern int mnt_context_has_hook(struct libmnt_context *cxt, const struct libmnt_hookset *hs, int stage, void *data); extern int mnt_context_append_hook(struct libmnt_context *cxt, const struct libmnt_hookset *hs, int stage, void *data, int (*func)(struct libmnt_context *, const struct libmnt_hookset *, void *)); extern int mnt_context_insert_hook(struct libmnt_context *cxt, const char *after, const struct libmnt_hookset *hs, int stage, void *data, int (*func)(struct libmnt_context *, const struct libmnt_hookset *, void *)); extern int mnt_context_remove_hook(struct libmnt_context *cxt, const struct libmnt_hookset *hs, int stage, void **data); extern int mnt_context_call_hooks(struct libmnt_context *cxt, int stage); /* * Namespace */ struct libmnt_ns { int fd; /* file descriptor of namespace, -1 when inactive */ struct libmnt_cache *cache; /* paths cache associated with NS */ }; /* * Mount context -- high-level API */ struct libmnt_context { int action; /* MNT_ACT_{MOUNT,UMOUNT} */ int restricted; /* root or not? */ char *fstype_pattern; /* for mnt_match_fstype() */ char *optstr_pattern; /* for mnt_match_options() */ struct libmnt_fs *fs; /* filesystem description (type, mountpoint, device, ...) */ struct libmnt_table *fstab; /* fstab entries */ struct libmnt_table *mountinfo; /* already mounted filesystems */ struct libmnt_table *utab; /* rarely used by umount only */ int (*table_errcb)(struct libmnt_table *tb, /* callback for libmnt_table structs */ const char *filename, int line); int (*table_fltrcb)(struct libmnt_fs *fs, void *data); /* callback for libmnt_table structs */ void *table_fltrcb_data; char *(*pwd_get_cb)(struct libmnt_context *); /* get encryption password */ void (*pwd_release_cb)(struct libmnt_context *, char *); /* release password */ int optsmode; /* fstab optstr mode MNT_OPTSMODE_{AUTO,FORCE,IGNORE} */ const void *mountdata; /* final mount(2) data, string or binary data */ struct libmnt_cache *cache; /* paths cache */ struct libmnt_lock *lock; /* utab lock */ struct libmnt_update *update; /* utab update */ struct libmnt_optlist *optlist; /* parsed mount options */ struct libmnt_optlist *optlist_saved; /* save/apply context template */ const struct libmnt_optmap *map_linux; /* system options map */ const struct libmnt_optmap *map_userspace; /* userspace options map */ const char *mountinfo_path; /* usualy /proc/self/moutinfo */ const char *utab_path; /* path to utab */ int utab_writable; /* is utab writable */ char *tgt_prefix; /* path used for all targets */ int flags; /* private context flags */ char *helper; /* name of the used /sbin/[u]mount. helper */ int helper_status; /* helper wait(2) status */ int helper_exec_status; /* 1: not called yet, 0: success, <0: -errno */ pid_t *children; /* "mount -a --fork" PIDs */ int nchildren; /* number of children */ pid_t pid; /* 0=parent; PID=child */ int syscall_status; /* 1: not called yet, 0: success, <0: -errno */ const char *syscall_name; /* failed syscall name */ struct libmnt_ns ns_orig; /* original namespace */ struct libmnt_ns ns_tgt; /* target namespace */ struct libmnt_ns *ns_cur; /* pointer to current namespace */ unsigned int enabled_textdomain : 1; /* bindtextdomain() called */ unsigned int noautofs : 1; /* ignore autofs mounts */ unsigned int has_selinux_opt : 1; /* temporary for broken fsconfig() syscall */ unsigned int force_clone : 1; /* OPEN_TREE_CLONE */ struct list_head hooksets_datas; /* global hooksets data */ struct list_head hooksets_hooks; /* global hooksets data */ }; /* flags */ #define MNT_FL_NOMTAB (1 << 1) #define MNT_FL_FAKE (1 << 2) #define MNT_FL_SLOPPY (1 << 3) #define MNT_FL_VERBOSE (1 << 4) #define MNT_FL_NOHELPERS (1 << 5) #define MNT_FL_LOOPDEL (1 << 6) #define MNT_FL_LAZY (1 << 7) #define MNT_FL_FORCE (1 << 8) #define MNT_FL_NOCANONICALIZE (1 << 9) #define MNT_FL_RDONLY_UMOUNT (1 << 11) /* remount,ro after EBUSY umount(2) */ #define MNT_FL_FORK (1 << 12) #define MNT_FL_NOSWAPMATCH (1 << 13) #define MNT_FL_RWONLY_MOUNT (1 << 14) /* explicit mount -w; never try read-only */ #define MNT_FL_ONLYONCE (1 << 15) #define MNT_FL_MOUNTDATA (1 << 20) #define MNT_FL_TAB_APPLIED (1 << 21) /* fstab merged to cxt->fs */ #define MNT_FL_MOUNTFLAGS_MERGED (1 << 22) /* MS_* flags was read from optstr */ #define MNT_FL_SAVED_USER (1 << 23) #define MNT_FL_PREPARED (1 << 24) #define MNT_FL_HELPER (1 << 25) /* [u]mount. */ #define MNT_FL_MOUNTOPTS_FIXED (1 << 27) #define MNT_FL_TABPATHS_CHECKED (1 << 28) #define MNT_FL_FORCED_RDONLY (1 << 29) /* mounted read-only on write-protected device */ #define MNT_FL_VERITYDEV_READY (1 << 30) /* /dev/mapper/ initialized by the library */ /* default flags */ #define MNT_FL_DEFAULT 0 /* Flags usable with MS_BIND|MS_REMOUNT */ #define MNT_BIND_SETTABLE (MS_NOSUID|MS_NODEV|MS_NOEXEC|MS_NOATIME|MS_NODIRATIME|MS_RELATIME|MS_RDONLY|MS_NOSYMFOLLOW) #define set_syscall_status(_cxt, _name, _x) __extension__ ({ \ if (!(_x)) { \ DBG(CXT, ul_debug("syscall '%s' [%m]", _name)); \ (_cxt)->syscall_status = -errno; \ (_cxt)->syscall_name = (_name); \ } else { \ DBG(CXT, ul_debug("syscall '%s' [success]", _name)); \ (_cxt)->syscall_status = 0; \ } \ }) #define reset_syscall_status(_cxt) __extension__ ({ \ DBG(CXT, ul_debug("reset syscall status")); \ (_cxt)->syscall_status = 0; \ (_cxt)->syscall_name = NULL; \ }) /* optmap.c */ extern const struct libmnt_optmap *mnt_optmap_get_entry( struct libmnt_optmap const **maps, int nmaps, const char *name, size_t namelen, const struct libmnt_optmap **mapent); /* optstr.c */ extern int mnt_optstr_remove_option_at(char **optstr, char *begin, char *end); extern int mnt_buffer_append_option(struct ul_buffer *buf, const char *name, size_t namesz, const char *val, size_t valsz, int quoted); /* optlist.h */ struct libmnt_opt; struct libmnt_optlist; extern struct libmnt_optlist *mnt_new_optlist(void); extern void mnt_ref_optlist(struct libmnt_optlist *ls); extern void mnt_unref_optlist(struct libmnt_optlist *ls); extern struct libmnt_optlist *mnt_copy_optlist(struct libmnt_optlist *ls); extern int mnt_optlist_is_empty(struct libmnt_optlist *ls); extern unsigned int mnt_optlist_get_age(struct libmnt_optlist *ls); extern int mnt_optlist_register_map(struct libmnt_optlist *ls, const struct libmnt_optmap *map); extern int mnt_optlist_remove_opt(struct libmnt_optlist *ls, struct libmnt_opt *opt); extern int mnt_optlist_remove_named(struct libmnt_optlist *ls, const char *name, const struct libmnt_optmap *map); extern int mnt_optlist_remove_flags(struct libmnt_optlist *ls, unsigned long flags, const struct libmnt_optmap *map); extern int mnt_optlist_next_opt(struct libmnt_optlist *ls, struct libmnt_iter *itr, struct libmnt_opt **opt); extern struct libmnt_opt *mnt_optlist_get_opt(struct libmnt_optlist *ls, unsigned long id, const struct libmnt_optmap *map); extern struct libmnt_opt *mnt_optlist_get_named(struct libmnt_optlist *ls, const char *name, const struct libmnt_optmap *map); extern int mnt_optlist_set_optstr(struct libmnt_optlist *ls, const char *optstr, const struct libmnt_optmap *map); extern int mnt_optlist_append_optstr(struct libmnt_optlist *ls, const char *optstr, const struct libmnt_optmap *map); extern int mnt_optlist_prepend_optstr(struct libmnt_optlist *ls, const char *optstr, const struct libmnt_optmap *map); extern int mnt_optlist_append_flags(struct libmnt_optlist *ls, unsigned long flags, const struct libmnt_optmap *map); extern int mnt_optlist_set_flags(struct libmnt_optlist *ls, unsigned long flags, const struct libmnt_optmap *map); extern int mnt_optlist_insert_flags(struct libmnt_optlist *ls, unsigned long flags, const struct libmnt_optmap *map, unsigned long after, const struct libmnt_optmap *after_map); /* "what" argument */ enum { /* Default -- if @map specified then returns all options for the map, otherwise * returns all options including uknonwn options, exclude external options */ MNT_OL_FLTR_DFLT = 0, /* Options as expected by mount. helpers */ MNT_OL_FLTR_HELPERS, /* Options as expected in mtab */ MNT_OL_FLTR_MTAB, /* All options -- include mapped, unknown and external options */ MNT_OL_FLTR_ALL, /* All unknown options -- exclude external (usually FS specific options) */ MNT_OL_FLTR_UNKNOWN, __MNT_OL_FLTR_COUNT /* keep it last */ }; extern int mnt_optlist_get_flags(struct libmnt_optlist *ls, unsigned long *flags, const struct libmnt_optmap *map, unsigned int what); /* recursive status for mnt_optlist_get_attrs() */ #define MNT_OL_REC 1 #define MNT_OL_NOREC 2 extern int mnt_optlist_get_attrs(struct libmnt_optlist *ls, uint64_t *set, uint64_t *clr, int rec); extern int mnt_optlist_get_optstr(struct libmnt_optlist *ol, const char **optstr, const struct libmnt_optmap *map, unsigned int what); extern int mnt_optlist_strdup_optstr(struct libmnt_optlist *ls, char **optstr, const struct libmnt_optmap *map, unsigned int what); extern int mnt_optlist_get_propagation(struct libmnt_optlist *ls); extern int mnt_optlist_is_propagation_only(struct libmnt_optlist *ls); extern int mnt_optlist_is_remount(struct libmnt_optlist *ls); extern int mnt_optlist_is_recursive(struct libmnt_optlist *ls); extern int mnt_optlist_is_bind(struct libmnt_optlist *ls); extern int mnt_optlist_is_rbind(struct libmnt_optlist *ls); extern int mnt_optlist_is_move(struct libmnt_optlist *ls); extern int mnt_optlist_is_rdonly(struct libmnt_optlist *ls); extern int mnt_optlist_is_silent(struct libmnt_optlist *ls); extern int mnt_optlist_merge_opts(struct libmnt_optlist *ls); extern int mnt_opt_has_value(struct libmnt_opt *opt); extern const char *mnt_opt_get_value(struct libmnt_opt *opt); extern const char *mnt_opt_get_name(struct libmnt_opt *opt); extern const struct libmnt_optmap *mnt_opt_get_map(struct libmnt_opt *opt); extern const struct libmnt_optmap *mnt_opt_get_mapent(struct libmnt_opt *opt); extern int mnt_opt_set_external(struct libmnt_opt *opt, int enable); extern int mnt_opt_set_value(struct libmnt_opt *opt, const char *str); extern int mnt_opt_set_u64value(struct libmnt_opt *opt, uint64_t num); extern int mnt_opt_set_quoted_value(struct libmnt_opt *opt, const char *str); extern int mnt_opt_is_external(struct libmnt_opt *opt); /* fs.c */ extern int mnt_fs_follow_optlist(struct libmnt_fs *fs, struct libmnt_optlist *ol); extern struct libmnt_fs *mnt_copy_mtab_fs(struct libmnt_fs *fs); extern int __mnt_fs_set_source_ptr(struct libmnt_fs *fs, char *source) __attribute__((nonnull(1))); extern int __mnt_fs_set_fstype_ptr(struct libmnt_fs *fs, char *fstype) __attribute__((nonnull(1))); extern int __mnt_fs_set_target_ptr(struct libmnt_fs *fs, char *tgt) __attribute__((nonnull(1))); /* context.c */ extern struct libmnt_context *mnt_copy_context(struct libmnt_context *o); extern int mnt_context_utab_writable(struct libmnt_context *cxt); extern const char *mnt_context_get_writable_tabpath(struct libmnt_context *cxt); extern int mnt_context_get_mountinfo(struct libmnt_context *cxt, struct libmnt_table **tb); extern int mnt_context_get_mountinfo_for_target(struct libmnt_context *cxt, struct libmnt_table **mountinfo, const char *tgt); extern int mnt_context_prepare_srcpath(struct libmnt_context *cxt); extern int mnt_context_guess_srcpath_fstype(struct libmnt_context *cxt, char **type); extern int mnt_context_guess_fstype(struct libmnt_context *cxt); extern int mnt_context_prepare_helper(struct libmnt_context *cxt, const char *name, const char *type); extern int mnt_context_prepare_update(struct libmnt_context *cxt); extern int mnt_context_merge_mflags(struct libmnt_context *cxt); extern int mnt_context_update_tabs(struct libmnt_context *cxt); extern int mnt_context_umount_setopt(struct libmnt_context *cxt, int c, char *arg); extern int mnt_context_mount_setopt(struct libmnt_context *cxt, int c, char *arg); extern int mnt_context_propagation_only(struct libmnt_context *cxt) __attribute__((nonnull)); extern int mnt_context_delete_loopdev(struct libmnt_context *cxt); extern int mnt_fork_context(struct libmnt_context *cxt); extern int mnt_context_set_tabfilter(struct libmnt_context *cxt, int (*fltr)(struct libmnt_fs *, void *), void *data); extern int mnt_context_get_generic_excode(int rc, char *buf, size_t bufsz, const char *fmt, ...) __attribute__ ((__format__ (__printf__, 4, 5))); extern int mnt_context_get_mount_excode(struct libmnt_context *cxt, int mntrc, char *buf, size_t bufsz); extern int mnt_context_get_umount_excode(struct libmnt_context *cxt, int mntrc, char *buf, size_t bufsz); extern int mnt_context_has_template(struct libmnt_context *cxt); extern int mnt_context_apply_template(struct libmnt_context *cxt); extern int mnt_context_save_template(struct libmnt_context *cxt); extern int mnt_context_apply_fs(struct libmnt_context *cxt, struct libmnt_fs *fs); extern struct libmnt_optlist *mnt_context_get_optlist(struct libmnt_context *cxt); /* tab_update.c */ extern int mnt_update_set_filename(struct libmnt_update *upd, const char *filename); extern int mnt_update_already_done(struct libmnt_update *upd, struct libmnt_lock *lc); #if __linux__ /* btrfs.c */ extern uint64_t btrfs_get_default_subvol_id(const char *path); #endif #ifdef USE_LIBMOUNT_MOUNTFD_SUPPORT /* fsconfig/fsopen based stuff */ struct libmnt_sysapi { int fd_fs; /* FD from fsopen() or fspick() */ int fd_tree; /* FD from fsmount() or open_tree() */ unsigned int is_new_fs : 1 ; /* fd_fs comes from fsopen() */ }; static inline struct libmnt_sysapi *mnt_context_get_sysapi(struct libmnt_context *cxt) { return mnt_context_get_hookset_data(cxt, &hookset_mount); } #endif #endif /* _LIBMOUNT_PRIVATE_H */