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git.proxmox.com Git - mirror_lxc.git/blob - src/lxc/storage/storage.h
1 /* SPDX-License-Identifier: LGPL-2.1+ */
3 #ifndef __LXC_STORAGE_H
4 #define __LXC_STORAGE_H
9 #include <lxc/lxccontainer.h>
12 #include <../include/lxcmntent.h>
20 #define MS_DIRSYNC 128
32 #define MS_SLAVE (1 << 19)
36 #define MS_RELATIME (1 << 21)
39 #ifndef MS_STRICTATIME
40 #define MS_STRICTATIME (1 << 24)
43 #define DEFAULT_FS_SIZE 1073741824
44 #define DEFAULT_FSTYPE "ext4"
46 #define LXC_STORAGE_INTERNAL_OVERLAY_RESTORE (1 << 6)
50 struct lxc_storage_ops
{
51 /* detect whether path is of this bdev type */
52 bool (*detect
)(const char *path
);
54 /* mount requires src and dest to be set. */
55 int (*mount
)(struct lxc_storage
*bdev
);
56 int (*umount
)(struct lxc_storage
*bdev
);
57 int (*destroy
)(struct lxc_storage
*bdev
);
58 int (*create
)(struct lxc_storage
*bdev
, const char *dest
, const char *n
,
59 struct bdev_specs
*specs
, const struct lxc_conf
*conf
);
60 /* given original mount, rename the paths for cloned container */
61 int (*clone_paths
)(struct lxc_storage
*orig
, struct lxc_storage
*new,
62 const char *oldname
, const char *cname
,
63 const char *oldpath
, const char *lxcpath
, int snap
,
64 uint64_t newsize
, struct lxc_conf
*conf
);
65 bool (*copy
)(struct lxc_conf
*conf
, struct lxc_storage
*orig
,
66 struct lxc_storage
*new, uint64_t newsize
);
67 bool (*snapshot
)(struct lxc_conf
*conf
, struct lxc_storage
*orig
,
68 struct lxc_storage
*new, uint64_t newsize
);
73 /* When lxc is mounting a rootfs, then src will be the "lxc.rootfs.path" value,
74 * dest will be the mount dir (i.e. "<libdir>/lxc") When clone or create is
75 * doing so, then dest will be "<lxcpath>/<lxcname>/rootfs", since we may need
76 * to rsync from one to the other.
79 const struct lxc_storage_ops
*ops
;
84 /* Turn the following into a union if need be. */
85 /* lofd is the open fd for the mounted loopback file. */
87 /* index for the connected nbd device. */
93 * storage_is_dir : Check whether the roots is a directory. This function will
94 * trust the config file. If the config file key
95 * lxc.rootfs.path is set to <storage type>:<container path>
96 * the confile parser will have split this into <storage type>
97 * and <container path> and set the <bdev_type> member in the
98 * lxc_rootfs struct to <storage type> and the <path> member
99 * will be set to a clean <container path> without the <storage
100 * type> prefix. This is the new, clean way of handling storage
101 * type specifications. If the <storage type> prefix is not
102 * detected liblxc will try to detect the storage type.
104 __hidden
extern bool storage_is_dir(struct lxc_conf
*conf
);
105 __hidden
extern bool storage_can_backup(struct lxc_conf
*conf
);
106 __hidden
extern struct lxc_storage
*storage_init(struct lxc_conf
*conf
);
107 __hidden
extern struct lxc_storage
*storage_copy(struct lxc_container
*c
, const char *cname
,
108 const char *lxcpath
, const char *bdevtype
,
109 int flags
, const char *bdevdata
, uint64_t newsize
,
111 __hidden
extern struct lxc_storage
*storage_create(const char *dest
, const char *type
,
112 const char *cname
, struct bdev_specs
*specs
,
113 const struct lxc_conf
*conf
);
114 __hidden
extern void storage_put(struct lxc_storage
*bdev
);
115 __hidden
extern bool storage_destroy(struct lxc_conf
*conf
);
116 __hidden
extern bool rootfs_is_blockdev(struct lxc_conf
*conf
);
117 __hidden
extern const char *lxc_storage_get_path(char *src
, const char *prefix
);
119 #endif /* #define __LXC_STORAGE_H */