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Diffstat (limited to 'fs/bcachefs/snapshot.h')
-rw-r--r--fs/bcachefs/snapshot.h140
1 files changed, 70 insertions, 70 deletions
diff --git a/fs/bcachefs/snapshot.h b/fs/bcachefs/snapshot.h
index b7d2fed37c4f..6766bf673ed9 100644
--- a/fs/bcachefs/snapshot.h
+++ b/fs/bcachefs/snapshot.h
@@ -2,14 +2,12 @@
#ifndef _BCACHEFS_SNAPSHOT_H
#define _BCACHEFS_SNAPSHOT_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(struct bch_fs *, struct bkey_s_c,
- enum bkey_invalid_flags, struct printbuf *);
+int bch2_snapshot_tree_validate(struct bch_fs *, struct bkey_s_c,
+ struct bkey_validate_context);
#define bch2_bkey_ops_snapshot_tree ((struct bkey_ops) { \
- .key_invalid = bch2_snapshot_tree_invalid, \
+ .key_validate = bch2_snapshot_tree_validate, \
.val_to_text = bch2_snapshot_tree_to_text, \
.min_val_size = 8, \
})
@@ -19,13 +17,14 @@ struct bkey_i_snapshot_tree *__bch2_snapshot_tree_create(struct btree_trans *);
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(struct bch_fs *, struct bkey_s_c,
- enum bkey_invalid_flags, struct printbuf *);
+int bch2_snapshot_validate(struct bch_fs *, struct bkey_s_c,
+ struct bkey_validate_context);
int bch2_mark_snapshot(struct btree_trans *, enum btree_id, unsigned,
- struct bkey_s_c, struct bkey_s, unsigned);
+ struct bkey_s_c, struct bkey_s,
+ enum btree_iter_update_trigger_flags);
#define bch2_bkey_ops_snapshot ((struct bkey_ops) { \
- .key_invalid = bch2_snapshot_invalid, \
+ .key_validate = bch2_snapshot_validate, \
.val_to_text = bch2_snapshot_to_text, \
.trigger = bch2_mark_snapshot, \
.min_val_size = 24, \
@@ -47,12 +46,9 @@ static inline const struct snapshot_t *snapshot_t(struct bch_fs *c, u32 id)
static inline u32 bch2_snapshot_tree(struct bch_fs *c, u32 id)
{
- rcu_read_lock();
+ guard(rcu)();
const struct snapshot_t *s = snapshot_t(c, id);
- id = s ? s->tree : 0;
- rcu_read_unlock();
-
- return id;
+ return s ? s->tree : 0;
}
static inline u32 __bch2_snapshot_parent_early(struct bch_fs *c, u32 id)
@@ -63,11 +59,8 @@ static inline u32 __bch2_snapshot_parent_early(struct bch_fs *c, u32 id)
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;
+ guard(rcu)();
+ return __bch2_snapshot_parent_early(c, id);
}
static inline u32 __bch2_snapshot_parent(struct bch_fs *c, u32 id)
@@ -77,7 +70,7 @@ static inline u32 __bch2_snapshot_parent(struct bch_fs *c, u32 id)
return 0;
u32 parent = s->parent;
- if (IS_ENABLED(CONFIG_BCACHEFS_DEBU) &&
+ if (IS_ENABLED(CONFIG_BCACHEFS_DEBUG) &&
parent &&
s->depth != snapshot_t(c, parent)->depth + 1)
panic("id %u depth=%u parent %u depth=%u\n",
@@ -89,65 +82,53 @@ static inline u32 __bch2_snapshot_parent(struct bch_fs *c, u32 id)
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;
+ guard(rcu)();
+ return __bch2_snapshot_parent(c, id);
}
static inline u32 bch2_snapshot_nth_parent(struct bch_fs *c, u32 id, u32 n)
{
- rcu_read_lock();
+ guard(rcu)();
while (n--)
id = __bch2_snapshot_parent(c, id);
- rcu_read_unlock();
-
return id;
}
+u32 bch2_snapshot_oldest_subvol(struct bch_fs *, u32, snapshot_id_list *);
u32 bch2_snapshot_skiplist_get(struct bch_fs *, u32);
static inline u32 bch2_snapshot_root(struct bch_fs *c, u32 id)
{
- u32 parent;
+ guard(rcu)();
- rcu_read_lock();
+ u32 parent;
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)
+static inline enum snapshot_id_state __bch2_snapshot_id_state(struct bch_fs *c, u32 id)
{
const struct snapshot_t *s = snapshot_t(c, id);
- return s ? s->equiv : 0;
+ return s ? s->state : SNAPSHOT_ID_empty;
}
-static inline u32 bch2_snapshot_equiv(struct bch_fs *c, u32 id)
+static inline enum snapshot_id_state bch2_snapshot_id_state(struct bch_fs *c, u32 id)
{
- rcu_read_lock();
- id = __bch2_snapshot_equiv(c, id);
- rcu_read_unlock();
-
- return id;
+ guard(rcu)();
+ return __bch2_snapshot_id_state(c, id);
}
-static inline bool bch2_snapshot_is_equiv(struct bch_fs *c, u32 id)
+static inline bool bch2_snapshot_exists(struct bch_fs *c, u32 id)
{
- return id == bch2_snapshot_equiv(c, id);
+ return bch2_snapshot_id_state(c, id) == SNAPSHOT_ID_live;
}
static inline int bch2_snapshot_is_internal_node(struct bch_fs *c, u32 id)
{
- rcu_read_lock();
+ guard(rcu)();
const struct snapshot_t *s = snapshot_t(c, id);
- int ret = s ? s->children[0] : -BCH_ERR_invalid_snapshot_node;
- rcu_read_unlock();
-
- return ret;
+ return s ? s->children[0] : -BCH_ERR_invalid_snapshot_node;
}
static inline int bch2_snapshot_is_leaf(struct bch_fs *c, u32 id)
@@ -160,13 +141,8 @@ static inline int bch2_snapshot_is_leaf(struct bch_fs *c, u32 id)
static inline u32 bch2_snapshot_depth(struct bch_fs *c, u32 parent)
{
- u32 depth;
-
- rcu_read_lock();
- depth = parent ? snapshot_t(c, parent)->depth + 1 : 0;
- rcu_read_unlock();
-
- return depth;
+ guard(rcu)();
+ return parent ? snapshot_t(c, parent)->depth + 1 : 0;
}
bool __bch2_snapshot_is_ancestor(struct bch_fs *, u32, u32);
@@ -180,23 +156,14 @@ static inline bool bch2_snapshot_is_ancestor(struct bch_fs *c, u32 id, u32 ances
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;
+ guard(rcu)();
+ const struct snapshot_t *t = snapshot_t(c, id);
+ return t && (t->children[0]|t->children[1]) != 0;
}
static inline bool snapshot_list_has_id(snapshot_id_list *s, u32 id)
{
- darray_for_each(*s, i)
- if (*i == id)
- return true;
- return false;
+ return darray_find(*s, id) != NULL;
}
static inline bool snapshot_list_has_ancestor(struct bch_fs *c, snapshot_id_list *s, u32 id)
@@ -250,8 +217,37 @@ int bch2_check_snapshot_trees(struct bch_fs *);
int bch2_check_snapshots(struct bch_fs *);
int bch2_reconstruct_snapshots(struct bch_fs *);
+int __bch2_check_key_has_snapshot(struct btree_trans *, struct btree_iter *, struct bkey_s_c);
+
+static inline int bch2_check_key_has_snapshot(struct btree_trans *trans,
+ struct btree_iter *iter,
+ struct bkey_s_c k)
+{
+ return likely(bch2_snapshot_exists(trans->c, k.k->p.snapshot))
+ ? 0
+ : __bch2_check_key_has_snapshot(trans, iter, k);
+}
+
+int __bch2_get_snapshot_overwrites(struct btree_trans *,
+ enum btree_id, struct bpos,
+ snapshot_id_list *);
+
+/*
+ * Get a list of snapshot IDs that have overwritten a given key:
+ */
+static inline int bch2_get_snapshot_overwrites(struct btree_trans *trans,
+ enum btree_id btree, struct bpos pos,
+ snapshot_id_list *s)
+{
+ darray_init(s);
+
+ return bch2_snapshot_has_children(trans->c, pos.snapshot)
+ ? __bch2_get_snapshot_overwrites(trans, btree, pos, s)
+ : 0;
+
+}
+
int bch2_snapshot_node_set_deleted(struct btree_trans *, u32);
-void bch2_delete_dead_snapshots_work(struct work_struct *);
int __bch2_key_has_snapshot_overwrites(struct btree_trans *, enum btree_id, struct bpos);
@@ -266,10 +262,14 @@ static inline int bch2_key_has_snapshot_overwrites(struct btree_trans *trans,
return __bch2_key_has_snapshot_overwrites(trans, id, pos);
}
-int bch2_propagate_key_to_snapshot_leaves(struct btree_trans *, enum btree_id,
- struct bkey_s_c, struct bpos *);
+int __bch2_delete_dead_snapshots(struct bch_fs *);
+int bch2_delete_dead_snapshots(struct bch_fs *);
+void bch2_delete_dead_snapshots_work(struct work_struct *);
+void bch2_delete_dead_snapshots_async(struct bch_fs *);
+void bch2_snapshot_delete_status_to_text(struct printbuf *, struct bch_fs *);
int bch2_snapshots_read(struct bch_fs *);
void bch2_fs_snapshots_exit(struct bch_fs *);
+void bch2_fs_snapshots_init_early(struct bch_fs *);
#endif /* _BCACHEFS_SNAPSHOT_H */
generated by cgit (git 2.34.1) at 2025-07-25 19:39:29 +0000