mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-15 16:24:13 +08:00
259 lines
6.1 KiB
C
259 lines
6.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _BCACHEFS_SUBVOLUME_H
|
|
#define _BCACHEFS_SUBVOLUME_H
|
|
|
|
#include "darray.h"
|
|
#include "subvolume_types.h"
|
|
|
|
enum bkey_invalid_flags;
|
|
|
|
void bch2_snapshot_tree_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c);
|
|
int bch2_snapshot_tree_invalid(const struct bch_fs *, struct bkey_s_c,
|
|
enum bkey_invalid_flags, struct printbuf *);
|
|
|
|
#define bch2_bkey_ops_snapshot_tree ((struct bkey_ops) { \
|
|
.key_invalid = bch2_snapshot_tree_invalid, \
|
|
.val_to_text = bch2_snapshot_tree_to_text, \
|
|
.min_val_size = 8, \
|
|
})
|
|
|
|
int bch2_snapshot_tree_lookup(struct btree_trans *, u32, struct bch_snapshot_tree *);
|
|
|
|
void bch2_snapshot_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c);
|
|
int bch2_snapshot_invalid(const struct bch_fs *, struct bkey_s_c,
|
|
enum bkey_invalid_flags, struct printbuf *);
|
|
int bch2_mark_snapshot(struct btree_trans *, enum btree_id, unsigned,
|
|
struct bkey_s_c, struct bkey_s_c, unsigned);
|
|
|
|
#define bch2_bkey_ops_snapshot ((struct bkey_ops) { \
|
|
.key_invalid = bch2_snapshot_invalid, \
|
|
.val_to_text = bch2_snapshot_to_text, \
|
|
.atomic_trigger = bch2_mark_snapshot, \
|
|
.min_val_size = 24, \
|
|
})
|
|
|
|
static inline struct snapshot_t *__snapshot_t(struct snapshot_table *t, u32 id)
|
|
{
|
|
return &t->s[U32_MAX - id];
|
|
}
|
|
|
|
static inline const struct snapshot_t *snapshot_t(struct bch_fs *c, u32 id)
|
|
{
|
|
return __snapshot_t(rcu_dereference(c->snapshots), id);
|
|
}
|
|
|
|
static inline u32 bch2_snapshot_tree(struct bch_fs *c, u32 id)
|
|
{
|
|
rcu_read_lock();
|
|
id = snapshot_t(c, id)->tree;
|
|
rcu_read_unlock();
|
|
|
|
return id;
|
|
}
|
|
|
|
static inline u32 __bch2_snapshot_parent_early(struct bch_fs *c, u32 id)
|
|
{
|
|
return snapshot_t(c, id)->parent;
|
|
}
|
|
|
|
static inline u32 bch2_snapshot_parent_early(struct bch_fs *c, u32 id)
|
|
{
|
|
rcu_read_lock();
|
|
id = __bch2_snapshot_parent_early(c, id);
|
|
rcu_read_unlock();
|
|
|
|
return id;
|
|
}
|
|
|
|
static inline u32 __bch2_snapshot_parent(struct bch_fs *c, u32 id)
|
|
{
|
|
#ifdef CONFIG_BCACHEFS_DEBUG
|
|
u32 parent = snapshot_t(c, id)->parent;
|
|
|
|
if (parent &&
|
|
snapshot_t(c, id)->depth != snapshot_t(c, parent)->depth + 1)
|
|
panic("id %u depth=%u parent %u depth=%u\n",
|
|
id, snapshot_t(c, id)->depth,
|
|
parent, snapshot_t(c, parent)->depth);
|
|
|
|
return parent;
|
|
#else
|
|
return snapshot_t(c, id)->parent;
|
|
#endif
|
|
}
|
|
|
|
static inline u32 bch2_snapshot_parent(struct bch_fs *c, u32 id)
|
|
{
|
|
rcu_read_lock();
|
|
id = __bch2_snapshot_parent(c, id);
|
|
rcu_read_unlock();
|
|
|
|
return id;
|
|
}
|
|
|
|
static inline u32 bch2_snapshot_nth_parent(struct bch_fs *c, u32 id, u32 n)
|
|
{
|
|
rcu_read_lock();
|
|
while (n--)
|
|
id = __bch2_snapshot_parent(c, id);
|
|
rcu_read_unlock();
|
|
|
|
return id;
|
|
}
|
|
|
|
static inline u32 bch2_snapshot_root(struct bch_fs *c, u32 id)
|
|
{
|
|
u32 parent;
|
|
|
|
rcu_read_lock();
|
|
while ((parent = __bch2_snapshot_parent(c, id)))
|
|
id = parent;
|
|
rcu_read_unlock();
|
|
|
|
return id;
|
|
}
|
|
|
|
static inline u32 __bch2_snapshot_equiv(struct bch_fs *c, u32 id)
|
|
{
|
|
return snapshot_t(c, id)->equiv;
|
|
}
|
|
|
|
static inline u32 bch2_snapshot_equiv(struct bch_fs *c, u32 id)
|
|
{
|
|
rcu_read_lock();
|
|
id = __bch2_snapshot_equiv(c, id);
|
|
rcu_read_unlock();
|
|
|
|
return id;
|
|
}
|
|
|
|
static inline bool bch2_snapshot_is_equiv(struct bch_fs *c, u32 id)
|
|
{
|
|
return id == bch2_snapshot_equiv(c, id);
|
|
}
|
|
|
|
static inline bool bch2_snapshot_is_internal_node(struct bch_fs *c, u32 id)
|
|
{
|
|
const struct snapshot_t *s;
|
|
bool ret;
|
|
|
|
rcu_read_lock();
|
|
s = snapshot_t(c, id);
|
|
ret = s->children[0];
|
|
rcu_read_unlock();
|
|
|
|
return ret;
|
|
}
|
|
|
|
static inline u32 bch2_snapshot_is_leaf(struct bch_fs *c, u32 id)
|
|
{
|
|
return !bch2_snapshot_is_internal_node(c, id);
|
|
}
|
|
|
|
static inline u32 bch2_snapshot_sibling(struct bch_fs *c, u32 id)
|
|
{
|
|
const struct snapshot_t *s;
|
|
u32 parent = __bch2_snapshot_parent(c, id);
|
|
|
|
if (!parent)
|
|
return 0;
|
|
|
|
s = snapshot_t(c, __bch2_snapshot_parent(c, id));
|
|
if (id == s->children[0])
|
|
return s->children[1];
|
|
if (id == s->children[1])
|
|
return s->children[0];
|
|
return 0;
|
|
}
|
|
|
|
bool __bch2_snapshot_is_ancestor(struct bch_fs *, u32, u32);
|
|
|
|
static inline bool bch2_snapshot_is_ancestor(struct bch_fs *c, u32 id, u32 ancestor)
|
|
{
|
|
return id == ancestor
|
|
? true
|
|
: __bch2_snapshot_is_ancestor(c, id, ancestor);
|
|
}
|
|
|
|
static inline bool bch2_snapshot_has_children(struct bch_fs *c, u32 id)
|
|
{
|
|
const struct snapshot_t *t;
|
|
bool ret;
|
|
|
|
rcu_read_lock();
|
|
t = snapshot_t(c, id);
|
|
ret = (t->children[0]|t->children[1]) != 0;
|
|
rcu_read_unlock();
|
|
|
|
return ret;
|
|
}
|
|
|
|
static inline bool snapshot_list_has_id(snapshot_id_list *s, u32 id)
|
|
{
|
|
u32 *i;
|
|
|
|
darray_for_each(*s, i)
|
|
if (*i == id)
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
static inline bool snapshot_list_has_ancestor(struct bch_fs *c, snapshot_id_list *s, u32 id)
|
|
{
|
|
u32 *i;
|
|
|
|
darray_for_each(*s, i)
|
|
if (bch2_snapshot_is_ancestor(c, id, *i))
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
static inline int snapshot_list_add(struct bch_fs *c, snapshot_id_list *s, u32 id)
|
|
{
|
|
int ret;
|
|
|
|
BUG_ON(snapshot_list_has_id(s, id));
|
|
ret = darray_push(s, id);
|
|
if (ret)
|
|
bch_err(c, "error reallocating snapshot_id_list (size %zu)", s->size);
|
|
return ret;
|
|
}
|
|
|
|
int bch2_check_snapshot_trees(struct bch_fs *);
|
|
int bch2_check_snapshots(struct bch_fs *);
|
|
int bch2_check_subvols(struct bch_fs *);
|
|
|
|
void bch2_fs_snapshots_exit(struct bch_fs *);
|
|
int bch2_snapshots_read(struct bch_fs *);
|
|
|
|
int bch2_subvolume_invalid(const struct bch_fs *, struct bkey_s_c,
|
|
unsigned, struct printbuf *);
|
|
void bch2_subvolume_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c);
|
|
|
|
#define bch2_bkey_ops_subvolume ((struct bkey_ops) { \
|
|
.key_invalid = bch2_subvolume_invalid, \
|
|
.val_to_text = bch2_subvolume_to_text, \
|
|
.min_val_size = 16, \
|
|
})
|
|
|
|
int bch2_subvolume_get(struct btree_trans *, unsigned,
|
|
bool, int, struct bch_subvolume *);
|
|
int bch2_snapshot_get_subvol(struct btree_trans *, u32,
|
|
struct bch_subvolume *);
|
|
int bch2_subvolume_get_snapshot(struct btree_trans *, u32, u32 *);
|
|
|
|
/* only exported for tests: */
|
|
int bch2_snapshot_node_create(struct btree_trans *, u32,
|
|
u32 *, u32 *, unsigned);
|
|
|
|
int bch2_delete_dead_snapshots(struct bch_fs *);
|
|
void bch2_delete_dead_snapshots_async(struct bch_fs *);
|
|
|
|
int bch2_subvolume_unlink(struct btree_trans *, u32);
|
|
int bch2_subvolume_create(struct btree_trans *, u64, u32,
|
|
u32 *, u32 *, bool);
|
|
|
|
int bch2_fs_subvolumes_init(struct bch_fs *);
|
|
|
|
#endif /* _BCACHEFS_SUBVOLUME_H */
|