diff options
author | Kent Overstreet <kent.overstreet@linux.dev> | 2024-01-16 17:00:02 -0500 |
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committer | Kent Overstreet <kent.overstreet@linux.dev> | 2024-01-16 17:17:23 -0500 |
commit | b5fd066153c40a70a29caa1ea7987723ab687763 (patch) | |
tree | 6d43a8b0a90d549a54c65565ac96c92b3e84b594 /c_src/libbcachefs/reflink.c | |
parent | 06ff8b55b70fda44d91b31b5511fafd1680a8934 (diff) |
Move c_src dirs back to toplevel
We just wanted c sourcefiles out of the top level, not c source
directories.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Diffstat (limited to 'c_src/libbcachefs/reflink.c')
-rw-r--r-- | c_src/libbcachefs/reflink.c | 594 |
1 files changed, 0 insertions, 594 deletions
diff --git a/c_src/libbcachefs/reflink.c b/c_src/libbcachefs/reflink.c deleted file mode 100644 index b24b71bc..00000000 --- a/c_src/libbcachefs/reflink.c +++ /dev/null @@ -1,594 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -#include "bcachefs.h" -#include "bkey_buf.h" -#include "btree_update.h" -#include "buckets.h" -#include "error.h" -#include "extents.h" -#include "inode.h" -#include "io_misc.h" -#include "io_write.h" -#include "rebalance.h" -#include "reflink.h" -#include "subvolume.h" -#include "super-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 */ - -int bch2_reflink_p_invalid(struct bch_fs *c, struct bkey_s_c k, - enum bkey_invalid_flags flags, - struct printbuf *err) -{ - struct bkey_s_c_reflink_p p = bkey_s_c_to_reflink_p(k); - int ret = 0; - - bkey_fsck_err_on(le64_to_cpu(p.v->idx) < le32_to_cpu(p.v->front_pad), - c, err, reflink_p_front_pad_bad, - "idx < front_pad (%llu < %u)", - le64_to_cpu(p.v->idx), le32_to_cpu(p.v->front_pad)); -fsck_err: - return ret; -} - -void bch2_reflink_p_to_text(struct printbuf *out, struct bch_fs *c, - struct bkey_s_c k) -{ - struct bkey_s_c_reflink_p p = bkey_s_c_to_reflink_p(k); - - prt_printf(out, "idx %llu front_pad %u back_pad %u", - le64_to_cpu(p.v->idx), - le32_to_cpu(p.v->front_pad), - le32_to_cpu(p.v->back_pad)); -} - -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_c_reflink_p r = bkey_s_c_to_reflink_p(_r); - - /* - * Disabled for now, the triggers code needs to be reworked for merging - * of reflink pointers to work: - */ - return false; - - 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 true; -} - -static int trans_trigger_reflink_p_segment(struct btree_trans *trans, - struct bkey_s_c_reflink_p p, - u64 *idx, unsigned flags) -{ - struct bch_fs *c = trans->c; - struct btree_iter iter; - struct bkey_i *k; - __le64 *refcount; - int add = !(flags & BTREE_TRIGGER_OVERWRITE) ? 1 : -1; - struct printbuf buf = PRINTBUF; - int ret; - - k = bch2_bkey_get_mut_noupdate(trans, &iter, - BTREE_ID_reflink, POS(0, *idx), - BTREE_ITER_WITH_UPDATES); - ret = PTR_ERR_OR_ZERO(k); - if (ret) - goto err; - - refcount = bkey_refcount(bkey_i_to_s(k)); - if (!refcount) { - bch2_bkey_val_to_text(&buf, c, p.s_c); - bch2_trans_inconsistent(trans, - "nonexistent indirect extent at %llu while marking\n %s", - *idx, buf.buf); - ret = -EIO; - goto err; - } - - if (!*refcount && (flags & BTREE_TRIGGER_OVERWRITE)) { - bch2_bkey_val_to_text(&buf, c, p.s_c); - bch2_trans_inconsistent(trans, - "indirect extent refcount underflow at %llu while marking\n %s", - *idx, buf.buf); - ret = -EIO; - goto err; - } - - if (flags & BTREE_TRIGGER_INSERT) { - struct bch_reflink_p *v = (struct bch_reflink_p *) p.v; - u64 pad; - - pad = max_t(s64, le32_to_cpu(v->front_pad), - le64_to_cpu(v->idx) - bkey_start_offset(&k->k)); - BUG_ON(pad > U32_MAX); - v->front_pad = cpu_to_le32(pad); - - pad = max_t(s64, le32_to_cpu(v->back_pad), - k->k.p.offset - p.k->size - le64_to_cpu(v->idx)); - BUG_ON(pad > U32_MAX); - v->back_pad = cpu_to_le32(pad); - } - - le64_add_cpu(refcount, add); - - bch2_btree_iter_set_pos_to_extent_start(&iter); - ret = bch2_trans_update(trans, &iter, k, 0); - if (ret) - goto err; - - *idx = k->k.p.offset; -err: - bch2_trans_iter_exit(trans, &iter); - printbuf_exit(&buf); - return ret; -} - -static s64 gc_trigger_reflink_p_segment(struct btree_trans *trans, - struct bkey_s_c_reflink_p p, - u64 *idx, unsigned flags, size_t r_idx) -{ - struct bch_fs *c = trans->c; - struct reflink_gc *r; - int add = !(flags & BTREE_TRIGGER_OVERWRITE) ? 1 : -1; - u64 start = le64_to_cpu(p.v->idx); - u64 end = le64_to_cpu(p.v->idx) + p.k->size; - u64 next_idx = end + le32_to_cpu(p.v->back_pad); - s64 ret = 0; - struct printbuf buf = PRINTBUF; - - if (r_idx >= c->reflink_gc_nr) - goto not_found; - - r = genradix_ptr(&c->reflink_gc_table, r_idx); - next_idx = min(next_idx, r->offset - r->size); - if (*idx < next_idx) - goto not_found; - - BUG_ON((s64) r->refcount + add < 0); - - r->refcount += add; - *idx = r->offset; - return 0; -not_found: - if (fsck_err(c, reflink_p_to_missing_reflink_v, - "pointer to missing indirect extent\n" - " %s\n" - " missing range %llu-%llu", - (bch2_bkey_val_to_text(&buf, c, p.s_c), buf.buf), - *idx, next_idx)) { - struct bkey_i *update = bch2_bkey_make_mut_noupdate(trans, p.s_c); - ret = PTR_ERR_OR_ZERO(update); - if (ret) - goto err; - - if (next_idx <= start) { - bkey_i_to_reflink_p(update)->v.front_pad = cpu_to_le32(start - next_idx); - } else if (*idx >= end) { - bkey_i_to_reflink_p(update)->v.back_pad = cpu_to_le32(*idx - end); - } else { - bkey_error_init(update); - update->k.p = p.k->p; - update->k.p.offset = next_idx; - update->k.size = next_idx - *idx; - set_bkey_val_u64s(&update->k, 0); - } - - ret = bch2_btree_insert_trans(trans, BTREE_ID_extents, update, BTREE_TRIGGER_NORUN); - } - - *idx = next_idx; -err: -fsck_err: - printbuf_exit(&buf); - return ret; -} - -static int __trigger_reflink_p(struct btree_trans *trans, - enum btree_id btree_id, unsigned level, - struct bkey_s_c k, unsigned flags) -{ - struct bch_fs *c = trans->c; - struct bkey_s_c_reflink_p p = bkey_s_c_to_reflink_p(k); - int ret = 0; - - u64 idx = le64_to_cpu(p.v->idx) - le32_to_cpu(p.v->front_pad); - u64 end = le64_to_cpu(p.v->idx) + p.k->size + le32_to_cpu(p.v->back_pad); - - if (flags & BTREE_TRIGGER_TRANSACTIONAL) { - while (idx < end && !ret) - ret = trans_trigger_reflink_p_segment(trans, p, &idx, flags); - } - - if (flags & BTREE_TRIGGER_GC) { - size_t l = 0, r = c->reflink_gc_nr; - - while (l < r) { - size_t m = l + (r - l) / 2; - struct reflink_gc *ref = genradix_ptr(&c->reflink_gc_table, m); - if (ref->offset <= idx) - l = m + 1; - else - r = m; - } - - while (idx < end && !ret) - ret = gc_trigger_reflink_p_segment(trans, p, &idx, flags, l++); - } - - return ret; -} - -int bch2_trigger_reflink_p(struct btree_trans *trans, - enum btree_id btree_id, unsigned level, - struct bkey_s_c old, - struct bkey_s new, - unsigned flags) -{ - if ((flags & BTREE_TRIGGER_TRANSACTIONAL) && - (flags & BTREE_TRIGGER_INSERT)) { - struct bch_reflink_p *v = bkey_s_to_reflink_p(new).v; - - v->front_pad = v->back_pad = 0; - } - - return trigger_run_overwrite_then_insert(__trigger_reflink_p, trans, btree_id, level, old, new, flags); -} - -/* indirect extents */ - -int bch2_reflink_v_invalid(struct bch_fs *c, struct bkey_s_c k, - enum bkey_invalid_flags flags, - struct printbuf *err) -{ - return bch2_bkey_ptrs_invalid(c, k, flags, err); -} - -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 - -static inline void check_indirect_extent_deleting(struct bkey_s new, unsigned *flags) -{ - if ((*flags & BTREE_TRIGGER_INSERT) && !*bkey_refcount(new)) { - new.k->type = KEY_TYPE_deleted; - new.k->size = 0; - set_bkey_val_u64s(new.k, 0); - *flags &= ~BTREE_TRIGGER_INSERT; - } -} - -int bch2_trans_mark_reflink_v(struct btree_trans *trans, - enum btree_id btree_id, unsigned level, - struct bkey_s_c old, struct bkey_s new, - unsigned flags) -{ - if ((flags & BTREE_TRIGGER_TRANSACTIONAL) && - (flags & BTREE_TRIGGER_INSERT)) - check_indirect_extent_deleting(new, &flags); - - if (old.k->type == KEY_TYPE_reflink_v && - new.k->type == KEY_TYPE_reflink_v && - old.k->u64s == new.k->u64s && - !memcmp(bkey_s_c_to_reflink_v(old).v->start, - bkey_s_to_reflink_v(new).v->start, - bkey_val_bytes(new.k) - 8)) - return 0; - - return bch2_trigger_extent(trans, btree_id, level, old, new, flags); -} - -/* indirect inline data */ - -int bch2_indirect_inline_data_invalid(struct bch_fs *c, struct bkey_s_c k, - enum bkey_invalid_flags flags, - struct printbuf *err) -{ - 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_trans_mark_indirect_inline_data(struct btree_trans *trans, - enum btree_id btree_id, unsigned level, - struct bkey_s_c old, struct bkey_s new, - unsigned flags) -{ - check_indirect_extent_deleting(new, &flags); - - return 0; -} - -static int bch2_make_extent_indirect(struct btree_trans *trans, - struct btree_iter *extent_iter, - struct bkey_i *orig) -{ - struct bch_fs *c = trans->c; - struct btree_iter reflink_iter = { NULL }; - struct bkey_s_c k; - struct bkey_i *r_v; - struct bkey_i_reflink_p *r_p; - __le64 *refcount; - int ret; - - if (orig->k.type == KEY_TYPE_inline_data) - bch2_check_set_feature(c, BCH_FEATURE_reflink_inline_data); - - bch2_trans_iter_init(trans, &reflink_iter, BTREE_ID_reflink, POS_MAX, - BTREE_ITER_INTENT); - k = bch2_btree_iter_peek_prev(&reflink_iter); - ret = bkey_err(k); - if (ret) - goto err; - - r_v = bch2_trans_kmalloc(trans, sizeof(__le64) + bkey_bytes(&orig->k)); - ret = PTR_ERR_OR_ZERO(r_v); - if (ret) - goto err; - - 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, orig->k.size); - r_v->k.version = orig->k.version; - - set_bkey_val_bytes(&r_v->k, sizeof(__le64) + bkey_val_bytes(&orig->k)); - - refcount = bkey_refcount(bkey_i_to_s(r_v)); - *refcount = 0; - memcpy(refcount + 1, &orig->v, bkey_val_bytes(&orig->k)); - - ret = bch2_trans_update(trans, &reflink_iter, r_v, 0); - if (ret) - goto err; - - /* - * orig is in a bkey_buf which statically allocates 5 64s for the val, - * so we know it will be big enough: - */ - 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)); - - /* FORTIFY_SOURCE is broken here, and doesn't provide unsafe_memset() */ -#if !defined(__NO_FORTIFY) && defined(__OPTIMIZE__) && defined(CONFIG_FORTIFY_SOURCE) - __underlying_memset(&r_p->v, 0, sizeof(r_p->v)); -#else - memset(&r_p->v, 0, sizeof(r_p->v)); -#endif - - r_p->v.idx = cpu_to_le64(bkey_start_offset(&r_v->k)); - - ret = bch2_trans_update(trans, extent_iter, &r_p->k_i, - BTREE_UPDATE_INTERNAL_SNAPSHOT_NODE); -err: - bch2_trans_iter_exit(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; - int ret; - - for_each_btree_key_upto_continue_norestart(*iter, end, 0, k, ret) { - if (bkey_extent_is_unwritten(k)) - continue; - - if (bkey_extent_is_data(k.k)) - return k; - } - - if (bkey_ge(iter->pos, end)) - bch2_btree_iter_set_pos(iter, end); - return ret ? bkey_s_c_err(ret) : bkey_s_c_null; -} - -s64 bch2_remap_range(struct bch_fs *c, - subvol_inum dst_inum, u64 dst_offset, - subvol_inum src_inum, u64 src_offset, - u64 remap_sectors, - u64 new_i_size, s64 *i_sectors_delta) -{ - struct btree_trans *trans; - struct btree_iter dst_iter, src_iter; - struct bkey_s_c src_k; - struct bkey_buf new_dst, new_src; - struct bpos dst_start = POS(dst_inum.inum, dst_offset); - struct bpos src_start = POS(src_inum.inum, src_offset); - struct bpos dst_end = dst_start, src_end = src_start; - struct bch_io_opts opts; - struct bpos src_want; - u64 dst_done = 0; - u32 dst_snapshot, src_snapshot; - int ret = 0, ret2 = 0; - - if (!bch2_write_ref_tryget(c, BCH_WRITE_REF_reflink)) - return -BCH_ERR_erofs_no_writes; - - 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); - trans = bch2_trans_get(c); - - ret = bch2_inum_opts_get(trans, src_inum, &opts); - if (ret) - goto err; - - bch2_trans_iter_init(trans, &src_iter, BTREE_ID_extents, src_start, - BTREE_ITER_INTENT); - bch2_trans_iter_init(trans, &dst_iter, BTREE_ID_extents, dst_start, - BTREE_ITER_INTENT); - - while ((ret == 0 || - bch2_err_matches(ret, BCH_ERR_transaction_restart)) && - bkey_lt(dst_iter.pos, dst_end)) { - struct disk_reservation disk_res = { 0 }; - - bch2_trans_begin(trans); - - if (fatal_signal_pending(current)) { - ret = -EINTR; - break; - } - - ret = bch2_subvolume_get_snapshot(trans, src_inum.subvol, - &src_snapshot); - if (ret) - continue; - - bch2_btree_iter_set_snapshot(&src_iter, src_snapshot); - - ret = bch2_subvolume_get_snapshot(trans, dst_inum.subvol, - &dst_snapshot); - if (ret) - continue; - - bch2_btree_iter_set_snapshot(&dst_iter, dst_snapshot); - - 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) - continue; - - if (bkey_lt(src_want, src_iter.pos)) { - ret = bch2_fpunch_at(trans, &dst_iter, dst_inum, - min(dst_end.offset, - dst_iter.pos.offset + - src_iter.pos.offset - src_want.offset), - i_sectors_delta); - continue; - } - - if (src_k.k->type != KEY_TYPE_reflink_p) { - bch2_btree_iter_set_pos_to_extent_start(&src_iter); - - 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, - new_src.k); - if (ret) - continue; - - BUG_ON(src_k.k->type != KEY_TYPE_reflink_p); - } - - if (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); - - u64 offset = le64_to_cpu(src_p.v->idx) + - (src_want.offset - - bkey_start_offset(src_k.k)); - - dst_p->v.idx = cpu_to_le64(offset); - } else { - BUG(); - } - - 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_bkey_set_needs_rebalance(c, new_dst.k, - opts.background_target, - opts.background_compression) ?: - bch2_extent_update(trans, dst_inum, &dst_iter, - new_dst.k, &disk_res, - new_i_size, i_sectors_delta, - true); - bch2_disk_reservation_put(c, &disk_res); - } - bch2_trans_iter_exit(trans, &dst_iter); - bch2_trans_iter_exit(trans, &src_iter); - - BUG_ON(!ret && !bkey_eq(dst_iter.pos, dst_end)); - BUG_ON(bkey_gt(dst_iter.pos, dst_end)); - - dst_done = dst_iter.pos.offset - dst_start.offset; - new_i_size = min(dst_iter.pos.offset << 9, new_i_size); - - do { - struct bch_inode_unpacked inode_u; - struct btree_iter inode_iter = { NULL }; - - bch2_trans_begin(trans); - - ret2 = bch2_inode_peek(trans, &inode_iter, &inode_u, - dst_inum, BTREE_ITER_INTENT); - - if (!ret2 && - 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, NULL, - BCH_TRANS_COMMIT_no_enospc); - } - - bch2_trans_iter_exit(trans, &inode_iter); - } while (bch2_err_matches(ret2, BCH_ERR_transaction_restart)); -err: - bch2_trans_put(trans); - bch2_bkey_buf_exit(&new_src, c); - bch2_bkey_buf_exit(&new_dst, c); - - bch2_write_ref_put(c, BCH_WRITE_REF_reflink); - - return dst_done ?: ret ?: ret2; -} |