eb38edce88
This adds some basic discovery of block device images for nspawn and friends. Note that this doesn't add searching for block devices using udev, but instead expects users to symlink relevant block devices into /var/lib/machines. Discovery is hence done exactly like for dir/subvol/raw file images, except that what is found may be a (symlink to) a block device. For now, we do not support cloning these images, but removal, renaming and read-only flags are supported to the point where that makes sense. Fixe: #6990
105 lines
2.7 KiB
C
105 lines
2.7 KiB
C
#pragma once
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/***
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This file is part of systemd.
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Copyright 2014 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <stdbool.h>
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#include <stdint.h>
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#include "hashmap.h"
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#include "lockfile-util.h"
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#include "macro.h"
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#include "path-util.h"
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#include "string-util.h"
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#include "time-util.h"
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typedef enum ImageType {
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IMAGE_DIRECTORY,
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IMAGE_SUBVOLUME,
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IMAGE_RAW,
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IMAGE_BLOCK,
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_IMAGE_TYPE_MAX,
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_IMAGE_TYPE_INVALID = -1
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} ImageType;
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typedef struct Image {
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ImageType type;
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char *name;
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char *path;
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bool read_only;
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usec_t crtime;
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usec_t mtime;
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uint64_t usage;
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uint64_t usage_exclusive;
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uint64_t limit;
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uint64_t limit_exclusive;
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void *userdata;
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} Image;
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Image *image_unref(Image *i);
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void image_hashmap_free(Hashmap *map);
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DEFINE_TRIVIAL_CLEANUP_FUNC(Image*, image_unref);
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DEFINE_TRIVIAL_CLEANUP_FUNC(Hashmap*, image_hashmap_free);
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int image_find(const char *name, Image **ret);
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int image_discover(Hashmap *map);
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int image_remove(Image *i);
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int image_rename(Image *i, const char *new_name);
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int image_clone(Image *i, const char *new_name, bool read_only);
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int image_read_only(Image *i, bool b);
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const char* image_type_to_string(ImageType t) _const_;
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ImageType image_type_from_string(const char *s) _pure_;
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bool image_name_is_valid(const char *s) _pure_;
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int image_path_lock(const char *path, int operation, LockFile *global, LockFile *local);
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int image_name_lock(const char *name, int operation, LockFile *ret);
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int image_set_limit(Image *i, uint64_t referenced_max);
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static inline bool IMAGE_IS_HIDDEN(const struct Image *i) {
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assert(i);
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return i->name && i->name[0] == '.';
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}
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static inline bool IMAGE_IS_VENDOR(const struct Image *i) {
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assert(i);
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return i->path && path_startswith(i->path, "/usr");
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}
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static inline bool IMAGE_IS_HOST(const struct Image *i) {
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assert(i);
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if (i->name && streq(i->name, ".host"))
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return true;
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if (i->path && path_equal(i->path, "/"))
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return true;
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return false;
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}
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