diff options
Diffstat (limited to 'fs/bcachefs/subvolume.c')
-rw-r--r-- | fs/bcachefs/subvolume.c | 242 |
1 files changed, 95 insertions, 147 deletions
diff --git a/fs/bcachefs/subvolume.c b/fs/bcachefs/subvolume.c index 353df662a9b5..6023ae46ca72 100644 --- a/fs/bcachefs/subvolume.c +++ b/fs/bcachefs/subvolume.c @@ -17,7 +17,7 @@ static int bch2_subvolume_delete(struct btree_trans *, u32); static int bch2_subvolume_missing(struct bch_fs *c, u32 subvolid) { - struct printbuf buf = PRINTBUF; + CLASS(printbuf, buf)(); bch2_log_msg_start(c, &buf); prt_printf(&buf, "missing subvolume %u", subvolid); @@ -27,7 +27,6 @@ static int bch2_subvolume_missing(struct bch_fs *c, u32 subvolid) BCH_RECOVERY_PASS_check_inodes, 0); if (print) bch2_print_str(c, KERN_ERR, buf.buf); - printbuf_exit(&buf); return ret; } @@ -47,18 +46,17 @@ static int check_subvol(struct btree_trans *trans, struct bkey_s_c k) { struct bch_fs *c = trans->c; - struct bkey_s_c_subvolume subvol; - struct btree_iter subvol_children_iter = {}; + struct bch_subvolume subvol; struct bch_snapshot snapshot; - struct printbuf buf = PRINTBUF; + CLASS(printbuf, buf)(); unsigned snapid; int ret = 0; if (k.k->type != KEY_TYPE_subvolume) return 0; - subvol = bkey_s_c_to_subvolume(k); - snapid = le32_to_cpu(subvol.v->snapshot); + bkey_val_copy(&subvol, bkey_s_c_to_subvolume(k)); + snapid = le32_to_cpu(subvol.snapshot); ret = bch2_snapshot_lookup(trans, snapid, &snapshot); if (bch2_err_matches(ret, ENOENT)) @@ -67,69 +65,67 @@ static int check_subvol(struct btree_trans *trans, if (ret) return ret; - if (BCH_SUBVOLUME_UNLINKED(subvol.v)) { + if (BCH_SUBVOLUME_UNLINKED(&subvol)) { ret = bch2_subvolume_delete(trans, iter->pos.offset); bch_err_msg(c, ret, "deleting subvolume %llu", iter->pos.offset); return ret ?: bch_err_throw(c, transaction_restart_nested); } - if (fsck_err_on(subvol.k->p.offset == BCACHEFS_ROOT_SUBVOL && - subvol.v->fs_path_parent, + if (fsck_err_on(k.k->p.offset == BCACHEFS_ROOT_SUBVOL && + subvol.fs_path_parent, trans, subvol_root_fs_path_parent_nonzero, "root subvolume has nonzero fs_path_parent\n%s", (bch2_bkey_val_to_text(&buf, c, k), buf.buf))) { struct bkey_i_subvolume *n = - bch2_bkey_make_mut_typed(trans, iter, &subvol.s_c, 0, subvolume); + bch2_bkey_make_mut_typed(trans, iter, &k, 0, subvolume); ret = PTR_ERR_OR_ZERO(n); if (ret) - goto err; + return ret; n->v.fs_path_parent = 0; } - if (subvol.v->fs_path_parent) { - struct bpos pos = subvolume_children_pos(k); - - struct bkey_s_c subvol_children_k = - bch2_bkey_get_iter(trans, &subvol_children_iter, - BTREE_ID_subvolume_children, pos, 0); + if (subvol.fs_path_parent) { + CLASS(btree_iter, subvol_children_iter)(trans, + BTREE_ID_subvolume_children, subvolume_children_pos(k), 0); + struct bkey_s_c subvol_children_k = bch2_btree_iter_peek_slot(&subvol_children_iter); ret = bkey_err(subvol_children_k); if (ret) - goto err; + return ret; if (fsck_err_on(subvol_children_k.k->type != KEY_TYPE_set, trans, subvol_children_not_set, "subvolume not set in subvolume_children btree at %llu:%llu\n%s", - pos.inode, pos.offset, + subvol_children_iter.pos.inode, subvol_children_iter.pos.offset, (printbuf_reset(&buf), bch2_bkey_val_to_text(&buf, c, k), buf.buf))) { - ret = bch2_btree_bit_mod(trans, BTREE_ID_subvolume_children, pos, true); + ret = bch2_btree_bit_mod(trans, BTREE_ID_subvolume_children, subvol_children_iter.pos, true); if (ret) - goto err; + return ret; } } struct bch_inode_unpacked inode; ret = bch2_inode_find_by_inum_nowarn_trans(trans, - (subvol_inum) { k.k->p.offset, le64_to_cpu(subvol.v->inode) }, + (subvol_inum) { k.k->p.offset, le64_to_cpu(subvol.inode) }, &inode); if (!ret) { - if (fsck_err_on(inode.bi_subvol != subvol.k->p.offset, + if (fsck_err_on(inode.bi_subvol != k.k->p.offset, trans, subvol_root_wrong_bi_subvol, "subvol root %llu:%u has wrong bi_subvol field: got %u, should be %llu", inode.bi_inum, inode.bi_snapshot, - inode.bi_subvol, subvol.k->p.offset)) { - inode.bi_subvol = subvol.k->p.offset; - inode.bi_snapshot = le32_to_cpu(subvol.v->snapshot); + inode.bi_subvol, k.k->p.offset)) { + inode.bi_subvol = k.k->p.offset; + inode.bi_snapshot = le32_to_cpu(subvol.snapshot); ret = __bch2_fsck_write_inode(trans, &inode); if (ret) - goto err; + return ret; } } else if (bch2_err_matches(ret, ENOENT)) { if (fsck_err(trans, subvol_to_missing_root, "subvolume %llu points to missing subvolume root %llu:%u", - k.k->p.offset, le64_to_cpu(subvol.v->inode), - le32_to_cpu(subvol.v->snapshot))) { + k.k->p.offset, le64_to_cpu(subvol.inode), + le32_to_cpu(subvol.snapshot))) { /* * Recreate - any contents that are still disconnected * will then get reattached under lost+found @@ -137,20 +133,20 @@ static int check_subvol(struct btree_trans *trans, bch2_inode_init_early(c, &inode); bch2_inode_init_late(c, &inode, bch2_current_time(c), 0, 0, S_IFDIR|0700, 0, NULL); - inode.bi_inum = le64_to_cpu(subvol.v->inode); - inode.bi_snapshot = le32_to_cpu(subvol.v->snapshot); + inode.bi_inum = le64_to_cpu(subvol.inode); + inode.bi_snapshot = le32_to_cpu(subvol.snapshot); inode.bi_subvol = k.k->p.offset; - inode.bi_parent_subvol = le32_to_cpu(subvol.v->fs_path_parent); + inode.bi_parent_subvol = le32_to_cpu(subvol.fs_path_parent); ret = __bch2_fsck_write_inode(trans, &inode); if (ret) - goto err; + return ret; } } else { - goto err; + return ret; } - if (!BCH_SUBVOLUME_SNAP(subvol.v)) { - u32 snapshot_root = bch2_snapshot_root(c, le32_to_cpu(subvol.v->snapshot)); + if (!BCH_SUBVOLUME_SNAP(&subvol)) { + u32 snapshot_root = bch2_snapshot_root(c, le32_to_cpu(subvol.snapshot)); u32 snapshot_tree = bch2_snapshot_tree(c, snapshot_root); struct bch_snapshot_tree st; @@ -160,37 +156,32 @@ static int check_subvol(struct btree_trans *trans, "%s: snapshot tree %u not found", __func__, snapshot_tree); if (ret) - goto err; + return ret; - if (fsck_err_on(le32_to_cpu(st.master_subvol) != subvol.k->p.offset, + if (fsck_err_on(le32_to_cpu(st.master_subvol) != k.k->p.offset, trans, subvol_not_master_and_not_snapshot, "subvolume %llu is not set as snapshot but is not master subvolume", k.k->p.offset)) { struct bkey_i_subvolume *s = - bch2_bkey_make_mut_typed(trans, iter, &subvol.s_c, 0, subvolume); + bch2_bkey_make_mut_typed(trans, iter, &k, 0, subvolume); ret = PTR_ERR_OR_ZERO(s); if (ret) - goto err; + return ret; SET_BCH_SUBVOLUME_SNAP(&s->v, true); } } -err: fsck_err: - bch2_trans_iter_exit(trans, &subvol_children_iter); - printbuf_exit(&buf); return ret; } int bch2_check_subvols(struct bch_fs *c) { - int ret = bch2_trans_run(c, - for_each_btree_key_commit(trans, iter, + CLASS(btree_trans, trans)(c); + return for_each_btree_key_commit(trans, iter, BTREE_ID_subvolumes, POS_MIN, BTREE_ITER_prefetch, k, NULL, NULL, BCH_TRANS_COMMIT_no_enospc, - check_subvol(trans, &iter, k))); - bch_err_fn(c, ret); - return ret; + check_subvol(trans, &iter, k)); } static int check_subvol_child(struct btree_trans *trans, @@ -219,13 +210,11 @@ fsck_err: int bch2_check_subvol_children(struct bch_fs *c) { - int ret = bch2_trans_run(c, - for_each_btree_key_commit(trans, iter, + CLASS(btree_trans, trans)(c); + return for_each_btree_key_commit(trans, iter, BTREE_ID_subvolume_children, POS_MIN, BTREE_ITER_prefetch, k, NULL, NULL, BCH_TRANS_COMMIT_no_enospc, - check_subvol_child(trans, &iter, k))); - bch_err_fn(c, ret); - return 0; + check_subvol_child(trans, &iter, k)); } /* Subvolumes: */ @@ -303,11 +292,8 @@ int bch2_subvolume_trigger(struct btree_trans *trans, int bch2_subvol_has_children(struct btree_trans *trans, u32 subvol) { - struct btree_iter iter; - - bch2_trans_iter_init(trans, &iter, BTREE_ID_subvolume_children, POS(subvol, 0), 0); - struct bkey_s_c k = bch2_btree_iter_peek(trans, &iter); - bch2_trans_iter_exit(trans, &iter); + CLASS(btree_iter, iter)(trans, BTREE_ID_subvolume_children, POS(subvol, 0), 0); + struct bkey_s_c k = bch2_btree_iter_peek(&iter); return bkey_err(k) ?: k.k && k.k->p.inode == subvol ? bch_err_throw(trans->c, ENOTEMPTY_subvol_not_empty) @@ -348,7 +334,8 @@ int bch2_subvol_is_ro_trans(struct btree_trans *trans, u32 subvol) int bch2_subvol_is_ro(struct bch_fs *c, u32 subvol) { - return bch2_trans_do(c, bch2_subvol_is_ro_trans(trans, subvol)); + CLASS(btree_trans, trans)(c); + return lockrestart_do(trans, bch2_subvol_is_ro_trans(trans, subvol)); } int bch2_snapshot_get_subvol(struct btree_trans *trans, u32 snapshot, @@ -363,22 +350,16 @@ int bch2_snapshot_get_subvol(struct btree_trans *trans, u32 snapshot, int __bch2_subvolume_get_snapshot(struct btree_trans *trans, u32 subvolid, u32 *snapid, bool warn) { - struct btree_iter iter; - struct bkey_s_c_subvolume subvol; - int ret; - - subvol = bch2_bkey_get_iter_typed(trans, &iter, - BTREE_ID_subvolumes, POS(0, subvolid), - BTREE_ITER_cached|BTREE_ITER_with_updates, - subvolume); - ret = bkey_err(subvol); + CLASS(btree_iter, iter)(trans, BTREE_ID_subvolumes, POS(0, subvolid), + BTREE_ITER_cached|BTREE_ITER_with_updates); + struct bkey_s_c_subvolume subvol = bch2_bkey_get_typed(&iter, subvolume); + int ret = bkey_err(subvol); if (bch2_err_matches(ret, ENOENT)) ret = bch2_subvolume_missing(trans->c, subvolid) ?: ret; if (likely(!ret)) *snapid = le32_to_cpu(subvol.v->snapshot); - bch2_trans_iter_exit(trans, &iter); return ret; } @@ -439,42 +420,35 @@ static int bch2_subvolumes_reparent(struct btree_trans *trans, u32 subvolid_to_d */ static int __bch2_subvolume_delete(struct btree_trans *trans, u32 subvolid) { - struct btree_iter subvol_iter = {}, snapshot_iter = {}, snapshot_tree_iter = {}; - - struct bkey_s_c_subvolume subvol = - bch2_bkey_get_iter_typed(trans, &subvol_iter, - BTREE_ID_subvolumes, POS(0, subvolid), - BTREE_ITER_cached|BTREE_ITER_intent, - subvolume); + CLASS(btree_iter, subvol_iter)(trans, BTREE_ID_subvolumes, POS(0, subvolid), + BTREE_ITER_cached|BTREE_ITER_intent); + struct bkey_s_c_subvolume subvol = bch2_bkey_get_typed(&subvol_iter, subvolume); int ret = bkey_err(subvol); if (bch2_err_matches(ret, ENOENT)) ret = bch2_subvolume_missing(trans->c, subvolid) ?: ret; if (ret) - goto err; + return ret; u32 snapid = le32_to_cpu(subvol.v->snapshot); - struct bkey_s_c_snapshot snapshot = - bch2_bkey_get_iter_typed(trans, &snapshot_iter, - BTREE_ID_snapshots, POS(0, snapid), - 0, snapshot); + CLASS(btree_iter, snapshot_iter)(trans, BTREE_ID_snapshots, POS(0, snapid), 0); + struct bkey_s_c_snapshot snapshot = bch2_bkey_get_typed(&snapshot_iter, snapshot); ret = bkey_err(snapshot); bch2_fs_inconsistent_on(bch2_err_matches(ret, ENOENT), trans->c, "missing snapshot %u", snapid); if (ret) - goto err; + return ret; u32 treeid = le32_to_cpu(snapshot.v->tree); + CLASS(btree_iter, snapshot_tree_iter)(trans, BTREE_ID_snapshot_trees, POS(0, treeid), 0); struct bkey_s_c_snapshot_tree snapshot_tree = - bch2_bkey_get_iter_typed(trans, &snapshot_tree_iter, - BTREE_ID_snapshot_trees, POS(0, treeid), - 0, snapshot_tree); + bch2_bkey_get_typed(&snapshot_tree_iter, snapshot_tree); ret = bkey_err(snapshot_tree); bch2_fs_inconsistent_on(bch2_err_matches(ret, ENOENT), trans->c, "missing snapshot tree %u", treeid); if (ret) - goto err; + return ret; if (le32_to_cpu(snapshot_tree.v->master_subvol) == subvolid) { struct bkey_i_snapshot_tree *snapshot_tree_mut = @@ -483,18 +457,13 @@ static int __bch2_subvolume_delete(struct btree_trans *trans, u32 subvolid) 0, snapshot_tree); ret = PTR_ERR_OR_ZERO(snapshot_tree_mut); if (ret) - goto err; + return ret; snapshot_tree_mut->v.master_subvol = 0; } - ret = bch2_btree_delete_at(trans, &subvol_iter, 0) ?: + return bch2_btree_delete_at(trans, &subvol_iter, 0) ?: bch2_snapshot_node_set_deleted(trans, snapid); -err: - bch2_trans_iter_exit(trans, &snapshot_tree_iter); - bch2_trans_iter_exit(trans, &snapshot_iter); - bch2_trans_iter_exit(trans, &subvol_iter); - return ret; } static int bch2_subvolume_delete(struct btree_trans *trans, u32 subvolid) @@ -514,18 +483,22 @@ static void bch2_subvolume_wait_for_pagecache_and_delete(struct work_struct *wor int ret = 0; while (!ret) { - mutex_lock(&c->snapshots_unlinked_lock); - snapshot_id_list s = c->snapshots_unlinked; - darray_init(&c->snapshots_unlinked); - mutex_unlock(&c->snapshots_unlinked_lock); + snapshot_id_list s; + + scoped_guard(mutex, &c->snapshots_unlinked_lock) { + s = c->snapshots_unlinked; + darray_init(&c->snapshots_unlinked); + } if (!s.nr) break; bch2_evict_subvolume_inodes(c, &s); + CLASS(btree_trans, trans)(c); + darray_for_each(s, id) { - ret = bch2_trans_run(c, bch2_subvolume_delete(trans, *id)); + ret = bch2_subvolume_delete(trans, *id); bch_err_msg(c, ret, "deleting subvolume %u", *id); if (ret) break; @@ -549,10 +522,9 @@ static int bch2_subvolume_wait_for_pagecache_and_delete_hook(struct btree_trans struct bch_fs *c = trans->c; int ret = 0; - mutex_lock(&c->snapshots_unlinked_lock); - if (!snapshot_list_has_id(&c->snapshots_unlinked, h->subvol)) - ret = snapshot_list_add(c, &c->snapshots_unlinked, h->subvol); - mutex_unlock(&c->snapshots_unlinked_lock); + scoped_guard(mutex, &c->snapshots_unlinked_lock) + if (!snapshot_list_has_id(&c->snapshots_unlinked, h->subvol)) + ret = snapshot_list_add(c, &c->snapshots_unlinked, h->subvol); if (ret) return ret; @@ -567,13 +539,8 @@ static int bch2_subvolume_wait_for_pagecache_and_delete_hook(struct btree_trans int bch2_subvolume_unlink(struct btree_trans *trans, u32 subvolid) { - struct btree_iter iter; - struct bkey_i_subvolume *n; - struct subvolume_unlink_hook *h; - int ret = 0; - - h = bch2_trans_kmalloc(trans, sizeof(*h)); - ret = PTR_ERR_OR_ZERO(h); + struct subvolume_unlink_hook *h = bch2_trans_kmalloc(trans, sizeof(*h)); + int ret = PTR_ERR_OR_ZERO(h); if (ret) return ret; @@ -581,9 +548,9 @@ int bch2_subvolume_unlink(struct btree_trans *trans, u32 subvolid) h->subvol = subvolid; bch2_trans_commit_hook(trans, &h->h); - n = bch2_bkey_get_mut_typed(trans, &iter, - BTREE_ID_subvolumes, POS(0, subvolid), - BTREE_ITER_cached, subvolume); + struct bkey_i_subvolume *n = + bch2_bkey_get_mut_typed(trans, BTREE_ID_subvolumes, POS(0, subvolid), + BTREE_ITER_cached, subvolume); ret = PTR_ERR_OR_ZERO(n); if (bch2_err_matches(ret, ENOENT)) ret = bch2_subvolume_missing(trans->c, subvolid) ?: ret; @@ -592,7 +559,6 @@ int bch2_subvolume_unlink(struct btree_trans *trans, u32 subvolid) SET_BCH_SUBVOLUME_UNLINKED(&n->v, true); n->v.fs_path_parent = 0; - bch2_trans_iter_exit(trans, &iter); return ret; } @@ -604,7 +570,7 @@ int bch2_subvolume_create(struct btree_trans *trans, u64 inode, bool ro) { struct bch_fs *c = trans->c; - struct btree_iter dst_iter, src_iter = {}; + struct btree_iter dst_iter; struct bkey_i_subvolume *new_subvol = NULL; struct bkey_i_subvolume *src_subvol = NULL; u32 parent = 0, new_nodes[2], snapshot_subvols[2]; @@ -623,9 +589,8 @@ int bch2_subvolume_create(struct btree_trans *trans, u64 inode, if (src_subvolid) { /* Creating a snapshot: */ - src_subvol = bch2_bkey_get_mut_typed(trans, &src_iter, - BTREE_ID_subvolumes, POS(0, src_subvolid), - BTREE_ITER_cached, subvolume); + src_subvol = bch2_bkey_get_mut_typed(trans, BTREE_ID_subvolumes, POS(0, src_subvolid), + BTREE_ITER_cached, subvolume); ret = PTR_ERR_OR_ZERO(src_subvol); if (bch2_err_matches(ret, ENOENT)) ret = bch2_subvolume_missing(trans->c, src_subvolid) ?: ret; @@ -641,12 +606,8 @@ int bch2_subvolume_create(struct btree_trans *trans, u64 inode, if (ret) goto err; - if (src_subvolid) { + if (src_subvolid) src_subvol->v.snapshot = cpu_to_le32(new_nodes[1]); - ret = bch2_trans_update(trans, &src_iter, &src_subvol->k_i, 0); - if (ret) - goto err; - } new_subvol = bch2_bkey_alloc(trans, &dst_iter, 0, subvolume); ret = PTR_ERR_OR_ZERO(new_subvol); @@ -667,8 +628,7 @@ int bch2_subvolume_create(struct btree_trans *trans, u64 inode, *new_subvolid = new_subvol->k.p.offset; *new_snapshotid = new_nodes[0]; err: - bch2_trans_iter_exit(trans, &src_iter); - bch2_trans_iter_exit(trans, &dst_iter); + bch2_trans_iter_exit(&dst_iter); return ret; } @@ -677,7 +637,6 @@ int bch2_initialize_subvolumes(struct bch_fs *c) struct bkey_i_snapshot_tree root_tree; struct bkey_i_snapshot root_snapshot; struct bkey_i_subvolume root_volume; - int ret; bkey_snapshot_tree_init(&root_tree.k_i); root_tree.k.p.offset = 1; @@ -698,51 +657,40 @@ int bch2_initialize_subvolumes(struct bch_fs *c) root_volume.v.snapshot = cpu_to_le32(U32_MAX); root_volume.v.inode = cpu_to_le64(BCACHEFS_ROOT_INO); - ret = bch2_btree_insert(c, BTREE_ID_snapshot_trees, &root_tree.k_i, NULL, 0, 0) ?: + return bch2_btree_insert(c, BTREE_ID_snapshot_trees, &root_tree.k_i, NULL, 0, 0) ?: bch2_btree_insert(c, BTREE_ID_snapshots, &root_snapshot.k_i, NULL, 0, 0) ?: bch2_btree_insert(c, BTREE_ID_subvolumes, &root_volume.k_i, NULL, 0, 0); - bch_err_fn(c, ret); - return ret; } static int __bch2_fs_upgrade_for_subvolumes(struct btree_trans *trans) { - struct btree_iter iter; - struct bkey_s_c k; - struct bch_inode_unpacked inode; - int ret; - - k = bch2_bkey_get_iter(trans, &iter, BTREE_ID_inodes, - SPOS(0, BCACHEFS_ROOT_INO, U32_MAX), 0); - ret = bkey_err(k); + CLASS(btree_iter, iter)(trans, BTREE_ID_inodes, SPOS(0, BCACHEFS_ROOT_INO, U32_MAX), 0); + struct bkey_s_c k = bch2_btree_iter_peek_slot(&iter); + int ret = bkey_err(k); if (ret) return ret; if (!bkey_is_inode(k.k)) { struct bch_fs *c = trans->c; bch_err(c, "root inode not found"); - ret = bch_err_throw(c, ENOENT_inode); - goto err; + return bch_err_throw(c, ENOENT_inode); } + struct bch_inode_unpacked inode; ret = bch2_inode_unpack(k, &inode); BUG_ON(ret); inode.bi_subvol = BCACHEFS_ROOT_SUBVOL; - ret = bch2_inode_write(trans, &iter, &inode); -err: - bch2_trans_iter_exit(trans, &iter); - return ret; + return bch2_inode_write(trans, &iter, &inode); } /* set bi_subvol on root inode */ int bch2_fs_upgrade_for_subvolumes(struct bch_fs *c) { - int ret = bch2_trans_commit_do(c, NULL, NULL, BCH_TRANS_COMMIT_no_enospc, - __bch2_fs_upgrade_for_subvolumes(trans)); - bch_err_fn(c, ret); - return ret; + CLASS(btree_trans, trans)(c); + return commit_do(trans, NULL, NULL, BCH_TRANS_COMMIT_no_enospc, + __bch2_fs_upgrade_for_subvolumes(trans)); } void bch2_fs_subvolumes_init_early(struct bch_fs *c) |