// SPDX-License-Identifier: GPL-2.0
#include "bcachefs.h"
+#include "bkey_buf.h"
#include "btree_update.h"
+#include "buckets.h"
#include "extents.h"
#include "inode.h"
#include "io.h"
#include <linux/sched/signal.h>
+static inline unsigned bkey_type_to_indirect(const struct bkey *k)
+{
+ switch (k->type) {
+ case KEY_TYPE_extent:
+ return KEY_TYPE_reflink_v;
+ case KEY_TYPE_inline_data:
+ return KEY_TYPE_indirect_inline_data;
+ default:
+ return 0;
+ }
+}
+
/* reflink pointers */
const char *bch2_reflink_p_invalid(const struct bch_fs *c, struct bkey_s_c k)
pr_buf(out, "idx %llu", le64_to_cpu(p.v->idx));
}
-enum merge_result bch2_reflink_p_merge(struct bch_fs *c,
- struct bkey_s _l, struct bkey_s _r)
+bool bch2_reflink_p_merge(struct bch_fs *c, struct bkey_s _l, struct bkey_s_c _r)
{
struct bkey_s_reflink_p l = bkey_s_to_reflink_p(_l);
- struct bkey_s_reflink_p r = bkey_s_to_reflink_p(_r);
+ struct bkey_s_c_reflink_p r = bkey_s_c_to_reflink_p(_r);
- if (le64_to_cpu(l.v->idx) + l.k->size != le64_to_cpu(r.v->idx))
- return BCH_MERGE_NOMERGE;
+ /*
+ * Disabled for now, the triggers code needs to be reworked for merging
+ * of reflink pointers to work:
+ */
+ return false;
- if ((u64) l.k->size + r.k->size > KEY_SIZE_MAX) {
- bch2_key_resize(l.k, KEY_SIZE_MAX);
- __bch2_cut_front(l.k->p, _r);
- return BCH_MERGE_PARTIAL;
- }
+ if (le64_to_cpu(l.v->idx) + l.k->size != le64_to_cpu(r.v->idx))
+ return false;
bch2_key_resize(l.k, l.k->size + r.k->size);
-
- return BCH_MERGE_MERGE;
+ return true;
}
/* indirect extents */
bch2_bkey_ptrs_to_text(out, c, k);
}
+bool bch2_reflink_v_merge(struct bch_fs *c, struct bkey_s _l, struct bkey_s_c _r)
+{
+ struct bkey_s_reflink_v l = bkey_s_to_reflink_v(_l);
+ struct bkey_s_c_reflink_v r = bkey_s_c_to_reflink_v(_r);
+
+ return l.v->refcount == r.v->refcount && bch2_extent_merge(c, _l, _r);
+}
+
+/* indirect inline data */
+
+const char *bch2_indirect_inline_data_invalid(const struct bch_fs *c,
+ struct bkey_s_c k)
+{
+ if (bkey_val_bytes(k.k) < sizeof(struct bch_indirect_inline_data))
+ return "incorrect value size";
+ return NULL;
+}
+
+void bch2_indirect_inline_data_to_text(struct printbuf *out,
+ struct bch_fs *c, struct bkey_s_c k)
+{
+ struct bkey_s_c_indirect_inline_data d = bkey_s_c_to_indirect_inline_data(k);
+ unsigned datalen = bkey_inline_data_bytes(k.k);
+
+ pr_buf(out, "refcount %llu datalen %u: %*phN",
+ le64_to_cpu(d.v->refcount), datalen,
+ min(datalen, 32U), d.v->data);
+}
+
static int bch2_make_extent_indirect(struct btree_trans *trans,
struct btree_iter *extent_iter,
- struct bkey_i_extent *e)
+ struct bkey_i *orig)
{
struct bch_fs *c = trans->c;
struct btree_iter *reflink_iter;
struct bkey_s_c k;
- struct bkey_i_reflink_v *r_v;
+ struct bkey_i *r_v;
struct bkey_i_reflink_p *r_p;
+ __le64 *refcount;
int ret;
- for_each_btree_key(trans, reflink_iter, BTREE_ID_REFLINK,
+ if (orig->k.type == KEY_TYPE_inline_data)
+ bch2_check_set_feature(c, BCH_FEATURE_reflink_inline_data);
+
+ for_each_btree_key(trans, reflink_iter, BTREE_ID_reflink,
POS(0, c->reflink_hint),
BTREE_ITER_INTENT|BTREE_ITER_SLOTS, k, ret) {
if (reflink_iter->pos.inode) {
continue;
}
- if (bkey_deleted(k.k) && e->k.size <= k.k->size)
+ if (bkey_deleted(k.k) && orig->k.size <= k.k->size)
break;
}
goto err;
/* rewind iter to start of hole, if necessary: */
- bch2_btree_iter_set_pos(reflink_iter, bkey_start_pos(k.k));
+ bch2_btree_iter_set_pos_to_extent_start(reflink_iter);
- r_v = bch2_trans_kmalloc(trans, sizeof(*r_v) + bkey_val_bytes(&e->k));
+ r_v = bch2_trans_kmalloc(trans, sizeof(__le64) + bkey_bytes(&orig->k));
ret = PTR_ERR_OR_ZERO(r_v);
if (ret)
goto err;
- bkey_reflink_v_init(&r_v->k_i);
+ bkey_init(&r_v->k);
+ r_v->k.type = bkey_type_to_indirect(&orig->k);
r_v->k.p = reflink_iter->pos;
- bch2_key_resize(&r_v->k, e->k.size);
- r_v->k.version = e->k.version;
+ bch2_key_resize(&r_v->k, orig->k.size);
+ r_v->k.version = orig->k.version;
- set_bkey_val_u64s(&r_v->k, bkey_val_u64s(&r_v->k) +
- bkey_val_u64s(&e->k));
- r_v->v.refcount = 0;
- memcpy(r_v->v.start, e->v.start, bkey_val_bytes(&e->k));
+ set_bkey_val_bytes(&r_v->k, sizeof(__le64) + bkey_val_bytes(&orig->k));
- bch2_trans_update(trans, reflink_iter, &r_v->k_i);
+ refcount = bkey_refcount(r_v);
+ *refcount = 0;
+ memcpy(refcount + 1, &orig->v, bkey_val_bytes(&orig->k));
- r_p = bch2_trans_kmalloc(trans, sizeof(*r_p));
- if (IS_ERR(r_p))
- return PTR_ERR(r_p);
+ ret = bch2_trans_update(trans, reflink_iter, r_v, 0);
+ if (ret)
+ goto err;
- e->k.type = KEY_TYPE_reflink_p;
- r_p = bkey_i_to_reflink_p(&e->k_i);
+ orig->k.type = KEY_TYPE_reflink_p;
+ r_p = bkey_i_to_reflink_p(orig);
set_bkey_val_bytes(&r_p->k, sizeof(r_p->v));
r_p->v.idx = cpu_to_le64(bkey_start_offset(&r_v->k));
- bch2_trans_update(trans, extent_iter, &r_p->k_i);
+ ret = bch2_trans_update(trans, extent_iter, &r_p->k_i, 0);
err:
- if (!IS_ERR(reflink_iter)) {
+ if (!IS_ERR(reflink_iter))
c->reflink_hint = reflink_iter->pos.offset;
- bch2_trans_iter_put(trans, reflink_iter);
- }
+ bch2_trans_iter_put(trans, reflink_iter);
return ret;
}
static struct bkey_s_c get_next_src(struct btree_iter *iter, struct bpos end)
{
- struct bkey_s_c k = bch2_btree_iter_peek(iter);
+ struct bkey_s_c k;
int ret;
for_each_btree_key_continue(iter, 0, k, ret) {
if (bkey_cmp(iter->pos, end) >= 0)
- return bkey_s_c_null;
-
- if (k.k->type == KEY_TYPE_extent ||
- k.k->type == KEY_TYPE_reflink_p)
break;
+
+ if (bkey_extent_is_data(k.k))
+ return k;
}
- return k;
+ bch2_btree_iter_set_pos(iter, end);
+ return bkey_s_c_null;
}
s64 bch2_remap_range(struct bch_fs *c,
struct btree_trans trans;
struct btree_iter *dst_iter, *src_iter;
struct bkey_s_c src_k;
- BKEY_PADDED(k) new_dst, new_src;
+ struct bkey_buf new_dst, new_src;
struct bpos dst_end = dst_start, src_end = src_start;
- struct bpos dst_want, src_want;
- u64 src_done, dst_done;
+ struct bpos src_want;
+ u64 dst_done;
int ret = 0, ret2 = 0;
if (!percpu_ref_tryget(&c->writes))
return -EROFS;
- if (!(c->sb.features & (1ULL << BCH_FEATURE_REFLINK))) {
- mutex_lock(&c->sb_lock);
- if (!(c->sb.features & (1ULL << BCH_FEATURE_REFLINK))) {
- c->disk_sb.sb->features[0] |=
- cpu_to_le64(1ULL << BCH_FEATURE_REFLINK);
-
- bch2_write_super(c);
- }
- mutex_unlock(&c->sb_lock);
- }
+ bch2_check_set_feature(c, BCH_FEATURE_reflink);
dst_end.offset += remap_sectors;
src_end.offset += remap_sectors;
+ bch2_bkey_buf_init(&new_dst);
+ bch2_bkey_buf_init(&new_src);
bch2_trans_init(&trans, c, BTREE_ITER_MAX, 4096);
- src_iter = bch2_trans_get_iter(&trans, BTREE_ID_EXTENTS, src_start,
+ src_iter = bch2_trans_get_iter(&trans, BTREE_ID_extents, src_start,
BTREE_ITER_INTENT);
- dst_iter = bch2_trans_get_iter(&trans, BTREE_ID_EXTENTS, dst_start,
+ dst_iter = bch2_trans_get_iter(&trans, BTREE_ID_extents, dst_start,
BTREE_ITER_INTENT);
- while (1) {
- bch2_trans_begin_updates(&trans);
- trans.mem_top = 0;
+ while ((ret == 0 || ret == -EINTR) &&
+ bkey_cmp(dst_iter->pos, dst_end) < 0) {
+ struct disk_reservation disk_res = { 0 };
+
+ bch2_trans_begin(&trans);
if (fatal_signal_pending(current)) {
ret = -EINTR;
- goto err;
+ break;
}
+ dst_done = dst_iter->pos.offset - dst_start.offset;
+ src_want = POS(src_start.inode, src_start.offset + dst_done);
+ bch2_btree_iter_set_pos(src_iter, src_want);
+
src_k = get_next_src(src_iter, src_end);
ret = bkey_err(src_k);
if (ret)
- goto btree_err;
-
- src_done = bpos_min(src_iter->pos, src_end).offset -
- src_start.offset;
- dst_want = POS(dst_start.inode, dst_start.offset + src_done);
+ continue;
- if (bkey_cmp(dst_iter->pos, dst_want) < 0) {
- ret = bch2_fpunch_at(&trans, dst_iter, dst_want,
- journal_seq, i_sectors_delta);
- if (ret)
- goto btree_err;
+ if (bkey_cmp(src_want, src_iter->pos) < 0) {
+ ret = bch2_fpunch_at(&trans, dst_iter,
+ bpos_min(dst_end,
+ POS(dst_iter->pos.inode, dst_iter->pos.offset +
+ src_iter->pos.offset - src_want.offset)),
+ journal_seq, i_sectors_delta);
continue;
}
- BUG_ON(bkey_cmp(dst_iter->pos, dst_want));
+ if (src_k.k->type != KEY_TYPE_reflink_p) {
+ bch2_btree_iter_set_pos_to_extent_start(src_iter);
- if (!bkey_cmp(dst_iter->pos, dst_end))
- break;
-
- if (src_k.k->type == KEY_TYPE_extent) {
- bkey_reassemble(&new_src.k, src_k);
- src_k = bkey_i_to_s_c(&new_src.k);
-
- bch2_cut_front(src_iter->pos, &new_src.k);
- bch2_cut_back(src_end, &new_src.k.k);
+ bch2_bkey_buf_reassemble(&new_src, c, src_k);
+ src_k = bkey_i_to_s_c(new_src.k);
ret = bch2_make_extent_indirect(&trans, src_iter,
- bkey_i_to_extent(&new_src.k));
+ new_src.k);
if (ret)
- goto btree_err;
+ continue;
BUG_ON(src_k.k->type != KEY_TYPE_reflink_p);
}
struct bkey_s_c_reflink_p src_p =
bkey_s_c_to_reflink_p(src_k);
struct bkey_i_reflink_p *dst_p =
- bkey_reflink_p_init(&new_dst.k);
+ bkey_reflink_p_init(new_dst.k);
u64 offset = le64_to_cpu(src_p.v->idx) +
- (src_iter->pos.offset -
+ (src_want.offset -
bkey_start_offset(src_k.k));
dst_p->v.idx = cpu_to_le64(offset);
BUG();
}
- new_dst.k.k.p = dst_iter->pos;
- bch2_key_resize(&new_dst.k.k,
- min(src_k.k->p.offset - src_iter->pos.offset,
+ new_dst.k->k.p = dst_iter->pos;
+ bch2_key_resize(&new_dst.k->k,
+ min(src_k.k->p.offset - src_want.offset,
dst_end.offset - dst_iter->pos.offset));
-
- ret = bch2_extent_update(&trans, dst_iter, &new_dst.k,
- NULL, journal_seq,
- new_i_size, i_sectors_delta);
- if (ret)
- goto btree_err;
-
- dst_done = dst_iter->pos.offset - dst_start.offset;
- src_want = POS(src_start.inode, src_start.offset + dst_done);
- bch2_btree_iter_set_pos(src_iter, src_want);
-btree_err:
- if (ret == -EINTR)
- ret = 0;
- if (ret)
- goto err;
+ ret = bch2_extent_update(&trans, dst_iter, new_dst.k,
+ &disk_res, journal_seq,
+ new_i_size, i_sectors_delta,
+ true);
+ bch2_disk_reservation_put(c, &disk_res);
}
+ bch2_trans_iter_put(&trans, dst_iter);
+ bch2_trans_iter_put(&trans, src_iter);
- BUG_ON(bkey_cmp(dst_iter->pos, dst_end));
-err:
+ BUG_ON(!ret && bkey_cmp(dst_iter->pos, dst_end));
BUG_ON(bkey_cmp(dst_iter->pos, dst_end) > 0);
dst_done = dst_iter->pos.offset - dst_start.offset;
ret2 = PTR_ERR_OR_ZERO(inode_iter);
if (!ret2 &&
- inode_u.bi_size < new_i_size)
+ inode_u.bi_size < new_i_size) {
+ inode_u.bi_size = new_i_size;
ret2 = bch2_inode_write(&trans, inode_iter, &inode_u) ?:
- bch2_trans_commit(&trans, NULL, journal_seq,
- BTREE_INSERT_ATOMIC);
+ bch2_trans_commit(&trans, NULL, journal_seq, 0);
+ }
+
+ bch2_trans_iter_put(&trans, inode_iter);
} while (ret2 == -EINTR);
ret = bch2_trans_exit(&trans) ?: ret;
+ bch2_bkey_buf_exit(&new_src, c);
+ bch2_bkey_buf_exit(&new_dst, c);
percpu_ref_put(&c->writes);
projects / bcachefs-tools-debian / blobdiff