From 6cf666ffb5694d38860eb3f46d773825487e7f7e Mon Sep 17 00:00:00 2001 From: Kent Overstreet Date: Thu, 31 Oct 2024 01:25:09 -0400 Subject: [PATCH 082/233] bcachefs: Reorganize reflink.c a bit Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit Signed-off-by: Kent Overstreet Signed-off-by: Alexander Miroshnichenko --- fs/bcachefs/btree_gc.c | 92 ------------------ fs/bcachefs/reflink.c | 214 ++++++++++++++++++++++++++++++----------- fs/bcachefs/reflink.h | 3 + 3 files changed, 160 insertions(+), 149 deletions(-) diff --git a/fs/bcachefs/btree_gc.c b/fs/bcachefs/btree_gc.c index e45cf32a6403..2e8cfc4d3265 100644 --- a/fs/bcachefs/btree_gc.c +++ b/fs/bcachefs/btree_gc.c @@ -937,98 +937,6 @@ static int bch2_gc_alloc_start(struct bch_fs *c) return ret; } -static int bch2_gc_write_reflink_key(struct btree_trans *trans, - struct btree_iter *iter, - struct bkey_s_c k, - size_t *idx) -{ - struct bch_fs *c = trans->c; - const __le64 *refcount = bkey_refcount_c(k); - struct printbuf buf = PRINTBUF; - struct reflink_gc *r; - int ret = 0; - - if (!refcount) - return 0; - - while ((r = genradix_ptr(&c->reflink_gc_table, *idx)) && - r->offset < k.k->p.offset) - ++*idx; - - if (!r || - r->offset != k.k->p.offset || - r->size != k.k->size) { - bch_err(c, "unexpected inconsistency walking reflink table at gc finish"); - return -EINVAL; - } - - if (fsck_err_on(r->refcount != le64_to_cpu(*refcount), - trans, reflink_v_refcount_wrong, - "reflink key has wrong refcount:\n" - " %s\n" - " should be %u", - (bch2_bkey_val_to_text(&buf, c, k), buf.buf), - r->refcount)) { - struct bkey_i *new = bch2_bkey_make_mut_noupdate(trans, k); - ret = PTR_ERR_OR_ZERO(new); - if (ret) - goto out; - - if (!r->refcount) - new->k.type = KEY_TYPE_deleted; - else - *bkey_refcount(bkey_i_to_s(new)) = cpu_to_le64(r->refcount); - ret = bch2_trans_update(trans, iter, new, 0); - } -out: -fsck_err: - printbuf_exit(&buf); - return ret; -} - -static int bch2_gc_reflink_done(struct bch_fs *c) -{ - size_t idx = 0; - - int ret = bch2_trans_run(c, - for_each_btree_key_commit(trans, iter, - BTREE_ID_reflink, POS_MIN, - BTREE_ITER_prefetch, k, - NULL, NULL, BCH_TRANS_COMMIT_no_enospc, - bch2_gc_write_reflink_key(trans, &iter, k, &idx))); - c->reflink_gc_nr = 0; - return ret; -} - -static int bch2_gc_reflink_start(struct bch_fs *c) -{ - c->reflink_gc_nr = 0; - - int ret = bch2_trans_run(c, - for_each_btree_key(trans, iter, BTREE_ID_reflink, POS_MIN, - BTREE_ITER_prefetch, k, ({ - const __le64 *refcount = bkey_refcount_c(k); - - if (!refcount) - continue; - - struct reflink_gc *r = genradix_ptr_alloc(&c->reflink_gc_table, - c->reflink_gc_nr++, GFP_KERNEL); - if (!r) { - ret = -BCH_ERR_ENOMEM_gc_reflink_start; - break; - } - - r->offset = k.k->p.offset; - r->size = k.k->size; - r->refcount = 0; - 0; - }))); - - bch_err_fn(c, ret); - return ret; -} - static int bch2_gc_write_stripes_key(struct btree_trans *trans, struct btree_iter *iter, struct bkey_s_c k) diff --git a/fs/bcachefs/reflink.c b/fs/bcachefs/reflink.c index addaf5f74624..36fb1e9473ff 100644 --- a/fs/bcachefs/reflink.c +++ b/fs/bcachefs/reflink.c @@ -72,6 +72,66 @@ bool bch2_reflink_p_merge(struct bch_fs *c, struct bkey_s _l, struct bkey_s_c _r return true; } +/* indirect extents */ + +int bch2_reflink_v_validate(struct bch_fs *c, struct bkey_s_c k, + enum bch_validate_flags flags) +{ + int ret = 0; + + bkey_fsck_err_on(bkey_gt(k.k->p, POS(0, REFLINK_P_IDX_MAX)), + c, reflink_v_pos_bad, + "indirect extent above maximum position 0:%llu", + REFLINK_P_IDX_MAX); + + ret = bch2_bkey_ptrs_validate(c, k, flags); +fsck_err: + return ret; +} + +void bch2_reflink_v_to_text(struct printbuf *out, struct bch_fs *c, + struct bkey_s_c k) +{ + struct bkey_s_c_reflink_v r = bkey_s_c_to_reflink_v(k); + + prt_printf(out, "refcount: %llu ", le64_to_cpu(r.v->refcount)); + + bch2_bkey_ptrs_to_text(out, c, k); +} + +#if 0 +Currently disabled, needs to be debugged: + +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); +} +#endif + +/* indirect inline data */ + +int bch2_indirect_inline_data_validate(struct bch_fs *c, struct bkey_s_c k, + enum bch_validate_flags flags) +{ + return 0; +} + +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); + + prt_printf(out, "refcount %llu datalen %u: %*phN", + le64_to_cpu(d.v->refcount), datalen, + min(datalen, 32U), d.v->data); +} + +/* reflink pointer trigger */ + static int trans_trigger_reflink_p_segment(struct btree_trans *trans, struct bkey_s_c_reflink_p p, u64 *idx, enum btree_iter_update_trigger_flags flags) @@ -253,44 +313,7 @@ int bch2_trigger_reflink_p(struct btree_trans *trans, return trigger_run_overwrite_then_insert(__trigger_reflink_p, trans, btree_id, level, old, new, flags); } -/* indirect extents */ - -int bch2_reflink_v_validate(struct bch_fs *c, struct bkey_s_c k, - enum bch_validate_flags flags) -{ - int ret = 0; - - bkey_fsck_err_on(bkey_gt(k.k->p, POS(0, REFLINK_P_IDX_MAX)), - c, reflink_v_pos_bad, - "indirect extent above maximum position 0:%llu", - REFLINK_P_IDX_MAX); - - ret = bch2_bkey_ptrs_validate(c, k, flags); -fsck_err: - return ret; -} - -void bch2_reflink_v_to_text(struct printbuf *out, struct bch_fs *c, - struct bkey_s_c k) -{ - struct bkey_s_c_reflink_v r = bkey_s_c_to_reflink_v(k); - - prt_printf(out, "refcount: %llu ", le64_to_cpu(r.v->refcount)); - - bch2_bkey_ptrs_to_text(out, c, k); -} - -#if 0 -Currently disabled, needs to be debugged: - -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); -} -#endif +/* indirect extent trigger */ static inline void check_indirect_extent_deleting(struct bkey_s new, @@ -316,25 +339,6 @@ int bch2_trigger_reflink_v(struct btree_trans *trans, return bch2_trigger_extent(trans, btree_id, level, old, new, flags); } -/* indirect inline data */ - -int bch2_indirect_inline_data_validate(struct bch_fs *c, struct bkey_s_c k, - enum bch_validate_flags flags) -{ - return 0; -} - -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); - - prt_printf(out, "refcount %llu datalen %u: %*phN", - le64_to_cpu(d.v->refcount), datalen, - min(datalen, 32U), d.v->data); -} - int bch2_trigger_indirect_inline_data(struct btree_trans *trans, enum btree_id btree_id, unsigned level, struct bkey_s_c old, struct bkey_s new, @@ -345,6 +349,8 @@ int bch2_trigger_indirect_inline_data(struct btree_trans *trans, return 0; } +/* create */ + static int bch2_make_extent_indirect(struct btree_trans *trans, struct btree_iter *extent_iter, struct bkey_i *orig) @@ -608,3 +614,97 @@ s64 bch2_remap_range(struct bch_fs *c, return dst_done ?: ret ?: ret2; } + +/* fsck */ + +static int bch2_gc_write_reflink_key(struct btree_trans *trans, + struct btree_iter *iter, + struct bkey_s_c k, + size_t *idx) +{ + struct bch_fs *c = trans->c; + const __le64 *refcount = bkey_refcount_c(k); + struct printbuf buf = PRINTBUF; + struct reflink_gc *r; + int ret = 0; + + if (!refcount) + return 0; + + while ((r = genradix_ptr(&c->reflink_gc_table, *idx)) && + r->offset < k.k->p.offset) + ++*idx; + + if (!r || + r->offset != k.k->p.offset || + r->size != k.k->size) { + bch_err(c, "unexpected inconsistency walking reflink table at gc finish"); + return -EINVAL; + } + + if (fsck_err_on(r->refcount != le64_to_cpu(*refcount), + trans, reflink_v_refcount_wrong, + "reflink key has wrong refcount:\n" + " %s\n" + " should be %u", + (bch2_bkey_val_to_text(&buf, c, k), buf.buf), + r->refcount)) { + struct bkey_i *new = bch2_bkey_make_mut_noupdate(trans, k); + ret = PTR_ERR_OR_ZERO(new); + if (ret) + goto out; + + if (!r->refcount) + new->k.type = KEY_TYPE_deleted; + else + *bkey_refcount(bkey_i_to_s(new)) = cpu_to_le64(r->refcount); + ret = bch2_trans_update(trans, iter, new, 0); + } +out: +fsck_err: + printbuf_exit(&buf); + return ret; +} + +int bch2_gc_reflink_done(struct bch_fs *c) +{ + size_t idx = 0; + + int ret = bch2_trans_run(c, + for_each_btree_key_commit(trans, iter, + BTREE_ID_reflink, POS_MIN, + BTREE_ITER_prefetch, k, + NULL, NULL, BCH_TRANS_COMMIT_no_enospc, + bch2_gc_write_reflink_key(trans, &iter, k, &idx))); + c->reflink_gc_nr = 0; + return ret; +} + +int bch2_gc_reflink_start(struct bch_fs *c) +{ + c->reflink_gc_nr = 0; + + int ret = bch2_trans_run(c, + for_each_btree_key(trans, iter, BTREE_ID_reflink, POS_MIN, + BTREE_ITER_prefetch, k, ({ + const __le64 *refcount = bkey_refcount_c(k); + + if (!refcount) + continue; + + struct reflink_gc *r = genradix_ptr_alloc(&c->reflink_gc_table, + c->reflink_gc_nr++, GFP_KERNEL); + if (!r) { + ret = -BCH_ERR_ENOMEM_gc_reflink_start; + break; + } + + r->offset = k.k->p.offset; + r->size = k.k->size; + r->refcount = 0; + 0; + }))); + + bch_err_fn(c, ret); + return ret; +} diff --git a/fs/bcachefs/reflink.h b/fs/bcachefs/reflink.h index 51afe11d8ed6..6ec3a9ea6bb4 100644 --- a/fs/bcachefs/reflink.h +++ b/fs/bcachefs/reflink.h @@ -76,4 +76,7 @@ static inline __le64 *bkey_refcount(struct bkey_s k) s64 bch2_remap_range(struct bch_fs *, subvol_inum, u64, subvol_inum, u64, u64, u64, s64 *); +int bch2_gc_reflink_done(struct bch_fs *); +int bch2_gc_reflink_start(struct bch_fs *); + #endif /* _BCACHEFS_REFLINK_H */ -- 2.45.2