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/*
* mountP.h - private library header file
*
* Copyright (C) 2008-2009 Karel Zak <kzak@redhat.com>
*
* This file may be redistributed under the terms of the
* GNU Lesser General Public License.
*/
#ifndef _LIBMOUNT_PRIVATE_H
#define _LIBMOUNT_PRIVATE_H
#include <sys/types.h>
#include <errno.h>
#include "c.h"
#define USE_UNSTABLE_LIBMOUNT_API
#include "mount.h"
#include "list.h"
/* features */
#define CONFIG_LIBMOUNT_ASSERT
#define CONFIG_LIBMOUNT_DEBUG
#ifdef CONFIG_LIBMOUNT_ASSERT
#include <assert.h>
#endif
/*
* Debug
*/
#if defined(TEST_PROGRAM) && !defined(LIBMOUNT_DEBUG)
#define CONFIG_LIBMOUNT_DEBUG
#endif
#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_OPTS (1 << 7)
#define MNT_DEBUG_UPDATE (1 << 8)
#define MNT_DEBUG_UTILS (1 << 9)
#define MNT_DEBUG_CXT (1 << 10)
#define MNT_DEBUG_ALL 0xFFFF
#ifdef CONFIG_LIBMOUNT_DEBUG
# include <stdio.h>
# include <stdarg.h>
# define DBG(m,x) do { \
if ((MNT_DEBUG_ ## m) & libmount_debug_mask) {\
fprintf(stderr, "libmount: %8s: ", # m); \
x; \
} \
} while(0)
# define DBG_FLUSH do { fflush(stderr); } while(0)
extern int libmount_debug_mask;
static inline void __attribute__ ((__format__ (__printf__, 1, 2)))
mnt_debug(const char *mesg, ...)
{
va_list ap;
va_start(ap, mesg);
vfprintf(stderr, mesg, ap);
va_end(ap);
fputc('\n', stderr);
}
static inline void __attribute__ ((__format__ (__printf__, 2, 3)))
mnt_debug_h(void *handler, const char *mesg, ...)
{
va_list ap;
fprintf(stderr, "[%p]: ", handler);
va_start(ap, mesg);
vfprintf(stderr, mesg, ap);
va_end(ap);
fputc('\n', stderr);
}
#else /* !CONFIG_LIBMOUNT_DEBUG */
# define DBG(m,x)
# define DBG_FLUSH
#endif
/* extension for files in the /etc/fstab.d directory */
#define MNT_MNTTABDIR_EXT ".fstab"
/* library private paths */
#define MNT_PATH_RUNDIR "/var/run/mount"
#define MNT_PATH_MOUNTINFO MNT_PATH_RUNDIR "/mountinfo"
#ifdef TEST_PROGRAM
struct mtest {
const char *name;
int (*body)(struct mtest *ts, int argc, char *argv[]);
const char *usage;
};
/* utils.c */
extern int mnt_run_test(struct mtest *tests, int argc, char *argv[]);
#endif
/* utils.c */
extern char *mnt_getenv_safe(const char *arg);
extern int endswith(const char *s, const char *sx);
extern int startswith(const char *s, const char *sx);
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_in_group(gid_t gid);
extern int mnt_has_regular_mtab(void);
extern char *mnt_get_mountpoint(const char *path);
extern char *mnt_get_fs_root(const char *path, const char *mountpoint);
/*
* Generic iterator
*/
struct _mnt_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_ITERATE(itr, res, restype, member) \
do { \
res = list_entry((itr)->p, restype, member); \
(itr)->p = IS_ITER_FORWARD(itr) ? \
(itr)->p->next : (itr)->p->prev; \
} while(0)
/*
* This struct represents one entry in mtab/fstab/mountinfo file.
*/
struct _mnt_fs {
struct list_head ents;
int id; /* mountinfo[1]: ID */
int parent; /* moutninfo[2]: parent */
dev_t devno; /* moutninfo[3]: st_dev */
char *source; /* fstab[1]: mountinfo[10]:
* 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; /* mountinfo[6,11], fstab[4]: option string */
char *vfs_optstr; /* mountinfo[6]: fs-independent (VFS) options */
char *fs_optstr; /* mountinfo[11]: fs-depend options */
int freq; /* fstab[5]: dump frequency in days */
int passno; /* fstab[6]: pass number on parallel fsck */
int flags; /* MNT_FS_* flags */
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 */
/*
* mtab/fstab/mountinfo file
*/
struct _mnt_tab {
int fmt; /* MNT_FMT_* file format */
int nents; /* number of valid entries */
mnt_cache *cache; /* canonicalized paths/tags cache */
int (*errcb)(mnt_tab *tb, const char *filename, int line);
struct list_head ents; /* list of entries (mentry) */
};
/*
* Mount context -- high-level API
*/
struct _mnt_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() */
mnt_fs *fs; /* filesystem description (type, mountpopint, device, ...) */
mnt_tab *fstab; /* fstab (or mtab for some remounts) entires */
mnt_tab *mtab; /* mtab entries */
int optsmode; /* fstab optstr mode MNT_OPTSMODE_{AUTO,FORCE,IGNORE} */
unsigned long mountflags; /* final mount(2) flags */
const void *mountdata; /* final mount(2) data, string or binary data */
unsigned long user_mountflags; /* MNT_MS_* (loop=, user=, ...) */
mnt_update *update; /* mtab update */
mnt_cache *cache; /* paths cache */
int flags; /* private context flags */
int ambi; /* libblkid returns ambivalent result */
char *helper; /* name of the used /sbin/[u]mount.<type> helper */
int helper_status; /* helper wait(2) status */
char *orig_user; /* original (non-fixed) user= option */
int syscall_errno; /* mount(2) or umount(2) error */
};
/* 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_NOLOCK (1 << 10) /* don't lock mtab file */
#define MNT_FL_RDONLY_UMOUNT (1 << 11) /* remount,ro after EBUSY umount(2) */
#define MNT_FL_EXTERN_FS (1 << 15) /* cxt->fs is not private */
#define MNT_FL_EXTERN_FSTAB (1 << 16) /* cxt->fstab is not private */
#define MNT_FL_EXTERN_CACHE (1 << 17) /* cxt->cache is not private */
#define MNT_FL_MOUNTDATA (1 << 20)
#define MNT_FL_TAB_APPLIED (1 << 21) /* mtab/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)
/* default flags */
#define MNT_FL_DEFAULT 0
/* optmap.c */
extern const struct mnt_optmap *mnt_optmap_get_entry(struct mnt_optmap const **maps,
int nmaps, const char *name,
size_t namelen, const struct mnt_optmap **mapent);
extern int mnt_optmap_enum_to_number(const struct mnt_optmap *mapent,
const char *rawdata, size_t len);
extern const char *mnt_optmap_get_type(const struct mnt_optmap *mapent);
extern int mnt_optmap_require_value(const struct mnt_optmap *mapent);
/* optstr.c */
extern int mnt_optstr_remove_option_at(char **optstr, char *begin, char *end);
/* fs.c */
extern int __mnt_fs_set_source_ptr(mnt_fs *fs, char *source);
extern int __mnt_fs_set_fstype_ptr(mnt_fs *fs, char *fstype);
extern int __mnt_fs_set_optstr_ptr(mnt_fs *fs, char *optstr, int split);
extern int __mnt_fs_set_optstr(mnt_fs *fs, const char *optstr, int split);
/* context.c */
extern int mnt_context_prepare_srcpath(mnt_context *cxt);
extern int mnt_context_guess_fstype(mnt_context *cxt);
extern int mnt_context_prepare_helper(mnt_context *cxt, const char *name, const char *type);
extern int mnt_context_prepare_update(mnt_context *cxt, int act);
extern mnt_fs *mnt_context_get_fs(mnt_context *cxt);
extern int mnt_context_merge_mountflags(mnt_context *cxt);
#endif /* _LIBMOUNT_PRIVATE_H */
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