#ifndef _BCACHEFS_SUBVOLUME_H
#define _BCACHEFS_SUBVOLUME_H
+#include "darray.h"
#include "subvolume_types.h"
-void bch2_snapshot_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c);
-const char *bch2_snapshot_invalid(const struct bch_fs *, struct bkey_s_c);
+enum bkey_invalid_flags;
-#define bch2_bkey_ops_snapshot (struct bkey_ops) { \
- .key_invalid = bch2_snapshot_invalid, \
- .val_to_text = bch2_snapshot_to_text, \
-}
+int bch2_check_subvols(struct bch_fs *);
-int bch2_mark_snapshot(struct bch_fs *, struct bkey_s_c,
- struct bkey_s_c, u64, unsigned);
-
-static inline struct snapshot_t *snapshot_t(struct bch_fs *c, u32 id)
-{
- return genradix_ptr(&c->snapshots, U32_MAX - id);
-}
-
-static inline u32 bch2_snapshot_parent(struct bch_fs *c, u32 id)
-{
- return snapshot_t(c, id)->parent;
-}
-
-static inline u32 bch2_snapshot_internal_node(struct bch_fs *c, u32 id)
-{
- struct snapshot_t *s = snapshot_t(c, id);
-
- return s->children[0] || s->children[1];
-}
-
-static inline u32 bch2_snapshot_sibling(struct bch_fs *c, u32 id)
-{
- 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;
-}
-
-static inline bool bch2_snapshot_is_ancestor(struct bch_fs *c, u32 id, u32 ancestor)
-{
- while (id && id < ancestor)
- id = bch2_snapshot_parent(c, id);
-
- return id == ancestor;
-}
-
-struct snapshots_seen {
- struct bpos pos;
- size_t nr;
- size_t size;
- u32 *d;
-};
-
-static inline void snapshots_seen_exit(struct snapshots_seen *s)
-{
- kfree(s->d);
- s->d = NULL;
-}
-
-static inline void snapshots_seen_init(struct snapshots_seen *s)
-{
- memset(s, 0, sizeof(*s));
-}
-
-static inline int snapshots_seen_add(struct bch_fs *c, struct snapshots_seen *s, u32 id)
-{
- if (s->nr == s->size) {
- size_t new_size = max(s->size, (size_t) 128) * 2;
- u32 *d = krealloc(s->d, new_size * sizeof(s->d[0]), GFP_KERNEL);
-
- if (!d) {
- bch_err(c, "error reallocating snapshots_seen table (new size %zu)",
- new_size);
- return -ENOMEM;
- }
-
- s->size = new_size;
- s->d = d;
- }
-
- s->d[s->nr++] = id;
- return 0;
-}
-
-static inline bool snapshot_list_has_id(struct snapshot_id_list *s, u32 id)
-{
- unsigned i;
-
- for (i = 0; i < s->nr; i++)
- if (id == s->d[i])
- return true;
- return false;
-}
-
-int bch2_fs_snapshots_check(struct bch_fs *);
-void bch2_fs_snapshots_exit(struct bch_fs *);
-int bch2_fs_snapshots_start(struct bch_fs *);
-
-const char *bch2_subvolume_invalid(const struct bch_fs *, struct bkey_s_c);
+int bch2_subvolume_invalid(struct bch_fs *, struct bkey_s_c,
+ enum bkey_invalid_flags, struct printbuf *);
void bch2_subvolume_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c);
-#define bch2_bkey_ops_subvolume (struct bkey_ops) { \
+#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_subvolume_get_snapshot(struct btree_trans *, u32, u32 *);
-int bch2_subvolume_delete(struct btree_trans *, u32);
+int bch2_subvol_is_ro_trans(struct btree_trans *, u32);
+int bch2_subvol_is_ro(struct bch_fs *, u32);
+
+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);