#include "bcachefs.h"
#include "bkey_buf.h"
#include "btree_update.h"
+#include "darray.h"
#include "dirent.h"
#include "error.h"
#include "fs-common.h"
#define QSTR(n) { { { .len = strlen(n) } }, .name = n }
+/*
+ * XXX: this is handling transaction restarts without returning
+ * -BCH_ERR_transaction_restart_nested, this is not how we do things anymore:
+ */
static s64 bch2_count_inode_sectors(struct btree_trans *trans, u64 inum,
u32 snapshot)
{
u64 sectors = 0;
int ret;
- for_each_btree_key(trans, iter, BTREE_ID_extents,
- SPOS(inum, 0, snapshot), 0, k, ret) {
- if (k.k->p.inode != inum)
- break;
-
+ for_each_btree_key_upto(trans, iter, BTREE_ID_extents,
+ SPOS(inum, 0, snapshot),
+ POS(inum, U64_MAX),
+ 0, k, ret)
if (bkey_extent_is_allocation(k.k))
sectors += k.k->size;
- }
bch2_trans_iter_exit(trans, &iter);
u64 subdirs = 0;
int ret;
- for_each_btree_key(trans, iter, BTREE_ID_dirents,
- SPOS(inum, 0, snapshot), 0, k, ret) {
- if (k.k->p.inode != inum)
- break;
-
+ for_each_btree_key_upto(trans, iter, BTREE_ID_dirents,
+ SPOS(inum, 0, snapshot),
+ POS(inum, U64_MAX),
+ 0, k, ret) {
if (k.k->type != KEY_TYPE_dirent)
continue;
if (d.v->d_type == DT_DIR)
subdirs++;
}
-
bch2_trans_iter_exit(trans, &iter);
return ret ?: subdirs;
}
-static int snapshot_lookup_subvol(struct btree_trans *trans, u32 snapshot,
- u32 *subvol)
-{
- return lockrestart_do(trans, __snapshot_lookup_subvol(trans, snapshot, subvol));
-}
-
static int __subvol_lookup(struct btree_trans *trans, u32 subvol,
u32 *snapshot, u64 *inum)
{
return lockrestart_do(trans, __subvol_lookup(trans, subvol, snapshot, inum));
}
+static int lookup_first_inode(struct btree_trans *trans, u64 inode_nr,
+ struct bch_inode_unpacked *inode)
+{
+ struct btree_iter iter;
+ struct bkey_s_c k;
+ int ret;
+
+ bch2_trans_iter_init(trans, &iter, BTREE_ID_inodes,
+ POS(0, inode_nr),
+ BTREE_ITER_ALL_SNAPSHOTS);
+ k = bch2_btree_iter_peek(&iter);
+ ret = bkey_err(k);
+ if (ret)
+ goto err;
+
+ if (!k.k || !bkey_eq(k.k->p, POS(0, inode_nr))) {
+ ret = -ENOENT;
+ goto err;
+ }
+
+ ret = bch2_inode_unpack(k, inode);
+err:
+ if (ret && !bch2_err_matches(ret, BCH_ERR_transaction_restart))
+ bch_err(trans->c, "error fetching inode %llu: %s",
+ inode_nr, bch2_err_str(ret));
+ bch2_trans_iter_exit(trans, &iter);
+ return ret;
+}
+
static int __lookup_inode(struct btree_trans *trans, u64 inode_nr,
struct bch_inode_unpacked *inode,
u32 *snapshot)
if (ret)
goto err;
- *snapshot = iter.pos.snapshot;
- ret = k.k->type == KEY_TYPE_inode
- ? bch2_inode_unpack(bkey_s_c_to_inode(k), inode)
+ ret = bkey_is_inode(k.k)
+ ? bch2_inode_unpack(k, inode)
: -ENOENT;
+ if (!ret)
+ *snapshot = iter.pos.snapshot;
err:
+ if (ret && !bch2_err_matches(ret, BCH_ERR_transaction_restart))
+ bch_err(trans->c, "error fetching inode %llu:%u: %s",
+ inode_nr, *snapshot, bch2_err_str(ret));
bch2_trans_iter_exit(trans, &iter);
return ret;
}
return 0;
}
-static int lookup_dirent(struct btree_trans *trans,
- struct bch_hash_info hash_info,
- subvol_inum dir, struct qstr *name,
- u64 *target, unsigned *type)
-{
- return lockrestart_do(trans,
- __lookup_dirent(trans, hash_info, dir, name, target, type));
-}
-
static int __write_inode(struct btree_trans *trans,
struct bch_inode_unpacked *inode,
u32 snapshot)
struct bch_inode_unpacked *inode,
u32 snapshot)
{
- int ret = __bch2_trans_do(trans, NULL, NULL,
+ int ret = commit_do(trans, NULL, NULL,
BTREE_INSERT_NOFAIL|
BTREE_INSERT_LAZY_RW,
__write_inode(trans, inode, snapshot));
if (ret)
- bch_err(trans->c, "error in fsck: error %i updating inode", ret);
+ bch_err(trans->c, "error in fsck: error updating inode: %s",
+ bch2_err_str(ret));
return ret;
}
static int fsck_inode_rm(struct btree_trans *trans, u64 inum, u32 snapshot)
{
+ struct bch_fs *c = trans->c;
struct btree_iter iter = { NULL };
struct bkey_i_inode_generation delete;
struct bch_inode_unpacked inode_u;
struct bkey_s_c k;
int ret;
- ret = bch2_btree_delete_range_trans(trans, BTREE_ID_extents,
- SPOS(inum, 0, snapshot),
- SPOS(inum, U64_MAX, snapshot),
- 0, NULL) ?:
- bch2_btree_delete_range_trans(trans, BTREE_ID_dirents,
- SPOS(inum, 0, snapshot),
- SPOS(inum, U64_MAX, snapshot),
- 0, NULL) ?:
- bch2_btree_delete_range_trans(trans, BTREE_ID_xattrs,
- SPOS(inum, 0, snapshot),
- SPOS(inum, U64_MAX, snapshot),
- 0, NULL);
+ do {
+ ret = bch2_btree_delete_range_trans(trans, BTREE_ID_extents,
+ SPOS(inum, 0, snapshot),
+ SPOS(inum, U64_MAX, snapshot),
+ 0, NULL) ?:
+ bch2_btree_delete_range_trans(trans, BTREE_ID_dirents,
+ SPOS(inum, 0, snapshot),
+ SPOS(inum, U64_MAX, snapshot),
+ 0, NULL) ?:
+ bch2_btree_delete_range_trans(trans, BTREE_ID_xattrs,
+ SPOS(inum, 0, snapshot),
+ SPOS(inum, U64_MAX, snapshot),
+ 0, NULL);
+ } while (ret == -BCH_ERR_transaction_restart_nested);
if (ret)
goto err;
retry:
if (ret)
goto err;
- if (k.k->type != KEY_TYPE_inode) {
- bch2_fs_inconsistent(trans->c,
+ if (!bkey_is_inode(k.k)) {
+ bch2_fs_inconsistent(c,
"inode %llu:%u not found when deleting",
inum, snapshot);
ret = -EIO;
goto err;
}
- bch2_inode_unpack(bkey_s_c_to_inode(k), &inode_u);
+ bch2_inode_unpack(k, &inode_u);
/* Subvolume root? */
- if (inode_u.bi_subvol) {
- ret = bch2_subvolume_delete(trans, inode_u.bi_subvol, -1);
- if (ret)
- goto err;
- }
+ if (inode_u.bi_subvol)
+ bch_warn(c, "deleting inode %llu marked as unlinked, but also a subvolume root!?", inode_u.bi_inum);
bkey_inode_generation_init(&delete.k_i);
delete.k.p = iter.pos;
BTREE_INSERT_NOFAIL);
err:
bch2_trans_iter_exit(trans, &iter);
- if (ret == -EINTR)
+ if (bch2_err_matches(ret, BCH_ERR_transaction_restart))
goto retry;
- return ret;
+ return ret ?: -BCH_ERR_transaction_restart_nested;
}
static int __remove_dirent(struct btree_trans *trans, struct bpos pos)
struct bch_hash_info dir_hash_info;
int ret;
- ret = lookup_inode(trans, pos.inode, &dir_inode, NULL);
+ ret = lookup_first_inode(trans, pos.inode, &dir_inode);
if (ret)
- return ret;
+ goto err;
dir_hash_info = bch2_hash_info_init(c, &dir_inode);
bch2_trans_iter_init(trans, &iter, BTREE_ID_dirents, pos, BTREE_ITER_INTENT);
ret = bch2_hash_delete_at(trans, bch2_dirent_hash_desc,
- &dir_hash_info, &iter, 0);
+ &dir_hash_info, &iter,
+ BTREE_UPDATE_INTERNAL_SNAPSHOT_NODE);
bch2_trans_iter_exit(trans, &iter);
- return ret;
-}
-
-static int remove_dirent(struct btree_trans *trans, struct bpos pos)
-{
- int ret = __bch2_trans_do(trans, NULL, NULL,
- BTREE_INSERT_NOFAIL|
- BTREE_INSERT_LAZY_RW,
- __remove_dirent(trans, pos));
- if (ret)
- bch_err(trans->c, "remove_dirent: err %i deleting dirent", ret);
+err:
+ if (ret && !bch2_err_matches(ret, BCH_ERR_transaction_restart))
+ bch_err(c, "%s(): error %s", __func__, bch2_err_str(ret));
return ret;
}
u32 snapshot;
int ret;
- ret = subvol_lookup(trans, subvol, &snapshot, &root_inum.inum);
+ ret = __subvol_lookup(trans, subvol, &snapshot, &root_inum.inum);
if (ret)
return ret;
- ret = lookup_inode(trans, root_inum.inum, &root, &snapshot);
- if (ret) {
- bch_err(c, "error fetching subvol root: %i", ret);
+ ret = __lookup_inode(trans, root_inum.inum, &root, &snapshot);
+ if (ret)
return ret;
- }
root_hash_info = bch2_hash_info_init(c, &root);
- ret = lookup_dirent(trans, root_hash_info, root_inum,
+ ret = __lookup_dirent(trans, root_hash_info, root_inum,
&lostfound_str, &inum, &d_type);
if (ret == -ENOENT) {
bch_notice(c, "creating lost+found");
goto create_lostfound;
}
- if (ret) {
- bch_err(c, "error looking up lost+found: %i", ret);
+ if (ret && !bch2_err_matches(ret, BCH_ERR_transaction_restart))
+ bch_err(c, "error looking up lost+found: %s", bch2_err_str(ret));
+ if (ret)
return ret;
- }
if (d_type != DT_DIR) {
bch_err(c, "error looking up lost+found: not a directory");
return ret;
-
}
- ret = lookup_inode(trans, inum, lostfound, &snapshot);
- if (ret && ret != -ENOENT) {
- /*
- * The check_dirents pass has already run, dangling dirents
- * shouldn't exist here:
- */
- bch_err(c, "error looking up lost+found: %i", ret);
- return ret;
- }
+ /*
+ * The check_dirents pass has already run, dangling dirents
+ * shouldn't exist here:
+ */
+ return __lookup_inode(trans, inum, lostfound, &snapshot);
- if (ret == -ENOENT) {
create_lostfound:
- bch2_inode_init_early(c, lostfound);
-
- ret = __bch2_trans_do(trans, NULL, NULL,
- BTREE_INSERT_NOFAIL|
- BTREE_INSERT_LAZY_RW,
- bch2_create_trans(trans, root_inum, &root,
- lostfound, &lostfound_str,
- 0, 0, S_IFDIR|0700, 0, NULL, NULL,
- (subvol_inum) { }, 0));
- if (ret)
- bch_err(c, "error creating lost+found: %i", ret);
- }
-
- return 0;
+ bch2_inode_init_early(c, lostfound);
+
+ ret = bch2_create_trans(trans, root_inum, &root,
+ lostfound, &lostfound_str,
+ 0, 0, S_IFDIR|0700, 0, NULL, NULL,
+ (subvol_inum) { }, 0);
+ if (ret && !bch2_err_matches(ret, BCH_ERR_transaction_restart))
+ bch_err(c, "error creating lost+found: %s", bch2_err_str(ret));
+ return ret;
}
-static int reattach_inode(struct btree_trans *trans,
+static int __reattach_inode(struct btree_trans *trans,
struct bch_inode_unpacked *inode,
u32 inode_snapshot)
{
u32 subvol;
int ret;
- ret = snapshot_lookup_subvol(trans, inode_snapshot, &subvol);
+ ret = __snapshot_lookup_subvol(trans, inode_snapshot, &subvol);
if (ret)
return ret;
if (S_ISDIR(inode->bi_mode)) {
lostfound.bi_nlink++;
- ret = write_inode(trans, &lostfound, U32_MAX);
+ ret = __write_inode(trans, &lostfound, U32_MAX);
if (ret)
return ret;
}
snprintf(name_buf, sizeof(name_buf), "%llu", inode->bi_inum);
name = (struct qstr) QSTR(name_buf);
- ret = __bch2_trans_do(trans, NULL, NULL, BTREE_INSERT_LAZY_RW,
- bch2_dirent_create(trans,
- (subvol_inum) {
- .subvol = subvol,
- .inum = lostfound.bi_inum,
- },
- &dir_hash,
- mode_to_type(inode->bi_mode),
- &name, inode->bi_inum, &dir_offset,
- BCH_HASH_SET_MUST_CREATE));
- if (ret) {
- bch_err(trans->c, "error %i reattaching inode %llu",
- ret, inode->bi_inum);
+ ret = bch2_dirent_create(trans,
+ (subvol_inum) {
+ .subvol = subvol,
+ .inum = lostfound.bi_inum,
+ },
+ &dir_hash,
+ inode_d_type(inode),
+ &name, inode->bi_inum, &dir_offset,
+ BCH_HASH_SET_MUST_CREATE);
+ if (ret)
return ret;
- }
inode->bi_dir = lostfound.bi_inum;
inode->bi_dir_offset = dir_offset;
- return write_inode(trans, inode, inode_snapshot);
+ return __write_inode(trans, inode, inode_snapshot);
+}
+
+static int reattach_inode(struct btree_trans *trans,
+ struct bch_inode_unpacked *inode,
+ u32 inode_snapshot)
+{
+ int ret = commit_do(trans, NULL, NULL,
+ BTREE_INSERT_LAZY_RW|
+ BTREE_INSERT_NOFAIL,
+ __reattach_inode(trans, inode, inode_snapshot));
+ if (ret) {
+ bch_err(trans->c, "error reattaching inode %llu: %s",
+ inode->bi_inum, bch2_err_str(ret));
+ return ret;
+ }
+
+ return ret;
}
static int remove_backpointer(struct btree_trans *trans,
goto out;
}
- ret = remove_dirent(trans, k.k->p);
+ ret = __remove_dirent(trans, k.k->p);
out:
bch2_trans_iter_exit(trans, &iter);
return ret;
}
-static int snapshots_seen_update(struct bch_fs *c, struct snapshots_seen *s, struct bpos pos)
+struct snapshots_seen_entry {
+ u32 id;
+ u32 equiv;
+};
+
+struct snapshots_seen {
+ struct bpos pos;
+ DARRAY(struct snapshots_seen_entry) ids;
+};
+
+static inline void snapshots_seen_exit(struct snapshots_seen *s)
+{
+ darray_exit(&s->ids);
+}
+
+static inline void snapshots_seen_init(struct snapshots_seen *s)
+{
+ memset(s, 0, sizeof(*s));
+}
+
+static int snapshots_seen_add(struct bch_fs *c, struct snapshots_seen *s, u32 id)
+{
+ struct snapshots_seen_entry *i, n = { id, id };
+ int ret;
+
+ darray_for_each(s->ids, i) {
+ if (n.equiv < i->equiv)
+ break;
+
+ if (i->equiv == n.equiv) {
+ bch_err(c, "%s(): adding duplicate snapshot", __func__);
+ return -EINVAL;
+ }
+ }
+
+ ret = darray_insert_item(&s->ids, i - s->ids.data, n);
+ if (ret)
+ bch_err(c, "error reallocating snapshots_seen table (size %zu)",
+ s->ids.size);
+ return ret;
+}
+
+static int snapshots_seen_update(struct bch_fs *c, struct snapshots_seen *s,
+ enum btree_id btree_id, struct bpos pos)
{
- pos.snapshot = snapshot_t(c, pos.snapshot)->equiv;
+ struct snapshots_seen_entry *i, n = {
+ .id = pos.snapshot,
+ .equiv = bch2_snapshot_equiv(c, pos.snapshot),
+ };
+ int ret = 0;
+
+ if (!bkey_eq(s->pos, pos))
+ s->ids.nr = 0;
- if (bkey_cmp(s->pos, pos))
- s->nr = 0;
+ pos.snapshot = n.equiv;
s->pos = pos;
- /* Might get called multiple times due to lock restarts */
- if (s->nr && s->d[s->nr - 1] == pos.snapshot)
- return 0;
+ darray_for_each(s->ids, i)
+ if (i->equiv == n.equiv) {
+ if (fsck_err_on(i->id != n.id, c,
+ "snapshot deletion did not run correctly:\n"
+ " duplicate keys in btree %s at %llu:%llu snapshots %u, %u (equiv %u)\n",
+ bch2_btree_ids[btree_id],
+ pos.inode, pos.offset,
+ i->id, n.id, n.equiv))
+ return -BCH_ERR_need_snapshot_cleanup;
+
+ return 0;
+ }
- return snapshots_seen_add(c, s, pos.snapshot);
+ ret = darray_push(&s->ids, n);
+ if (ret)
+ bch_err(c, "error reallocating snapshots_seen table (size %zu)",
+ s->ids.size);
+fsck_err:
+ return ret;
}
/**
u32 id, u32 ancestor)
{
ssize_t i;
+ u32 top = seen->ids.nr ? seen->ids.data[seen->ids.nr - 1].equiv : 0;
BUG_ON(id > ancestor);
-
- id = snapshot_t(c, id)->equiv;
- ancestor = snapshot_t(c, ancestor)->equiv;
+ BUG_ON(!bch2_snapshot_is_equiv(c, id));
+ BUG_ON(!bch2_snapshot_is_equiv(c, ancestor));
/* @ancestor should be the snapshot most recently added to @seen */
- BUG_ON(!seen->nr || seen->d[seen->nr - 1] != ancestor);
- BUG_ON(seen->pos.snapshot != ancestor);
+ BUG_ON(ancestor != seen->pos.snapshot);
+ BUG_ON(ancestor != top);
if (id == ancestor)
return true;
if (!bch2_snapshot_is_ancestor(c, id, ancestor))
return false;
- for (i = seen->nr - 2;
- i >= 0 && seen->d[i] >= id;
+ for (i = seen->ids.nr - 2;
+ i >= 0 && seen->ids.data[i].equiv >= id;
--i)
- if (bch2_snapshot_is_ancestor(c, id, seen->d[i]) &&
- bch2_snapshot_is_ancestor(c, seen->d[i], ancestor))
+ if (bch2_snapshot_is_ancestor(c, id, seen->ids.data[i].equiv) &&
+ bch2_snapshot_is_ancestor(c, seen->ids.data[i].equiv, ancestor))
return false;
return true;
: bch2_snapshot_is_ancestor(c, src, dst);
}
-#define for_each_visible_inode(_c, _s, _w, _snapshot, _i) \
- for (_i = (_w)->d; _i < (_w)->d + (_w)->nr && (_i)->snapshot <= (_snapshot); _i++)\
+static int ref_visible2(struct bch_fs *c,
+ u32 src, struct snapshots_seen *src_seen,
+ u32 dst, struct snapshots_seen *dst_seen)
+{
+ src = bch2_snapshot_equiv(c, src);
+ dst = bch2_snapshot_equiv(c, dst);
+
+ if (dst > src) {
+ swap(dst, src);
+ swap(dst_seen, src_seen);
+ }
+ return key_visible_in_snapshot(c, src_seen, dst, src);
+}
+
+#define for_each_visible_inode(_c, _s, _w, _snapshot, _i) \
+ for (_i = (_w)->inodes.data; _i < (_w)->inodes.data + (_w)->inodes.nr && \
+ (_i)->snapshot <= (_snapshot); _i++) \
if (key_visible_in_snapshot(_c, _s, _i->snapshot, _snapshot))
+struct inode_walker_entry {
+ struct bch_inode_unpacked inode;
+ u32 snapshot;
+ u64 count;
+};
+
struct inode_walker {
bool first_this_inode;
u64 cur_inum;
- size_t nr;
- size_t size;
- struct inode_walker_entry {
- struct bch_inode_unpacked inode;
- u32 snapshot;
- u64 count;
- } *d;
+ DARRAY(struct inode_walker_entry) inodes;
};
static void inode_walker_exit(struct inode_walker *w)
{
- kfree(w->d);
- w->d = NULL;
+ darray_exit(&w->inodes);
}
static struct inode_walker inode_walker_init(void)
return (struct inode_walker) { 0, };
}
-static int inode_walker_realloc(struct inode_walker *w)
-{
- if (w->nr == w->size) {
- size_t new_size = max_t(size_t, 8UL, w->size * 2);
- void *d = krealloc(w->d, new_size * sizeof(w->d[0]),
- GFP_KERNEL);
- if (!d)
- return -ENOMEM;
-
- w->d = d;
- w->size = new_size;
- }
-
- return 0;
-}
-
static int add_inode(struct bch_fs *c, struct inode_walker *w,
- struct bkey_s_c_inode inode)
+ struct bkey_s_c inode)
{
struct bch_inode_unpacked u;
- int ret;
-
- ret = inode_walker_realloc(w);
- if (ret)
- return ret;
BUG_ON(bch2_inode_unpack(inode, &u));
- w->d[w->nr++] = (struct inode_walker_entry) {
+ return darray_push(&w->inodes, ((struct inode_walker_entry) {
.inode = u,
- .snapshot = snapshot_t(c, inode.k->p.snapshot)->equiv,
- };
-
- return 0;
+ .snapshot = bch2_snapshot_equiv(c, inode.k->p.snapshot),
+ }));
}
static int __walk_inode(struct btree_trans *trans,
struct bch_fs *c = trans->c;
struct btree_iter iter;
struct bkey_s_c k;
- unsigned i, ancestor_pos;
+ u32 restart_count = trans->restart_count;
+ unsigned i;
int ret;
- pos.snapshot = snapshot_t(c, pos.snapshot)->equiv;
+ pos.snapshot = bch2_snapshot_equiv(c, pos.snapshot);
if (pos.inode == w->cur_inum) {
w->first_this_inode = false;
goto lookup_snapshot;
}
- w->nr = 0;
+ w->inodes.nr = 0;
for_each_btree_key(trans, iter, BTREE_ID_inodes, POS(0, pos.inode),
BTREE_ITER_ALL_SNAPSHOTS, k, ret) {
if (k.k->p.offset != pos.inode)
break;
- if (k.k->type == KEY_TYPE_inode)
- add_inode(c, w, bkey_s_c_to_inode(k));
+ if (bkey_is_inode(k.k))
+ add_inode(c, w, k);
}
bch2_trans_iter_exit(trans, &iter);
w->cur_inum = pos.inode;
w->first_this_inode = true;
+
+ if (trans_was_restarted(trans, restart_count))
+ return -BCH_ERR_transaction_restart_nested;
+
lookup_snapshot:
- for (i = 0; i < w->nr; i++)
- if (bch2_snapshot_is_ancestor(c, pos.snapshot, w->d[i].snapshot))
+ for (i = 0; i < w->inodes.nr; i++)
+ if (bch2_snapshot_is_ancestor(c, pos.snapshot, w->inodes.data[i].snapshot))
goto found;
return INT_MAX;
found:
- BUG_ON(pos.snapshot > w->d[i].snapshot);
+ BUG_ON(pos.snapshot > w->inodes.data[i].snapshot);
+
+ if (pos.snapshot != w->inodes.data[i].snapshot) {
+ struct inode_walker_entry e = w->inodes.data[i];
+
+ e.snapshot = pos.snapshot;
+ e.count = 0;
- if (pos.snapshot != w->d[i].snapshot) {
- ancestor_pos = i;
+ bch_info(c, "have key for inode %llu:%u but have inode in ancestor snapshot %u",
+ pos.inode, pos.snapshot, w->inodes.data[i].snapshot);
- while (i && w->d[i - 1].snapshot > pos.snapshot)
+ while (i && w->inodes.data[i - 1].snapshot > pos.snapshot)
--i;
- ret = inode_walker_realloc(w);
+ ret = darray_insert_item(&w->inodes, i, e);
if (ret)
return ret;
-
- array_insert_item(w->d, w->nr, i, w->d[ancestor_pos]);
- w->d[i].snapshot = pos.snapshot;
- w->d[i].count = 0;
}
return i;
}
-static int walk_inode(struct btree_trans *trans,
- struct inode_walker *w, struct bpos pos)
-{
- return lockrestart_do(trans, __walk_inode(trans, w, pos));
-}
-
static int __get_visible_inodes(struct btree_trans *trans,
struct inode_walker *w,
struct snapshots_seen *s,
struct bkey_s_c k;
int ret;
- w->nr = 0;
+ w->inodes.nr = 0;
- for_each_btree_key(trans, iter, BTREE_ID_inodes, POS(0, inum),
+ for_each_btree_key_norestart(trans, iter, BTREE_ID_inodes, POS(0, inum),
BTREE_ITER_ALL_SNAPSHOTS, k, ret) {
+ u32 equiv = bch2_snapshot_equiv(c, k.k->p.snapshot);
+
if (k.k->p.offset != inum)
break;
- if (k.k->type != KEY_TYPE_inode)
+ if (!ref_visible(c, s, s->pos.snapshot, equiv))
continue;
- if (ref_visible(c, s, s->pos.snapshot, k.k->p.snapshot)) {
- add_inode(c, w, bkey_s_c_to_inode(k));
- if (k.k->p.snapshot >= s->pos.snapshot)
- break;
- }
+ if (bkey_is_inode(k.k))
+ add_inode(c, w, k);
+
+ if (equiv >= s->pos.snapshot)
+ break;
}
bch2_trans_iter_exit(trans, &iter);
struct bkey_s_c k)
{
struct bch_fs *c = trans->c;
- char buf[200];
+ struct printbuf buf = PRINTBUF;
int ret = 0;
- if (fsck_err_on(!snapshot_t(c, k.k->p.snapshot)->equiv, c,
+ if (mustfix_fsck_err_on(!bch2_snapshot_equiv(c, k.k->p.snapshot), c,
"key in missing snapshot: %s",
- (bch2_bkey_val_to_text(&PBUF(buf), c, k), buf))) {
- ret = __bch2_trans_do(trans, NULL, NULL, BTREE_INSERT_LAZY_RW,
- bch2_btree_delete_at(trans, iter,
- BTREE_UPDATE_INTERNAL_SNAPSHOT_NODE));
- return ret ?: -EINTR;
- }
+ (bch2_bkey_val_to_text(&buf, c, k), buf.buf)))
+ ret = bch2_btree_delete_at(trans, iter,
+ BTREE_UPDATE_INTERNAL_SNAPSHOT_NODE) ?: 1;
fsck_err:
+ printbuf_exit(&buf);
return ret;
}
struct bch_hash_info *hash_info,
struct btree_iter *k_iter, struct bkey_s_c k)
{
- bch_err(trans->c, "hash_redo_key() not implemented yet");
- return -EINVAL;
-#if 0
struct bkey_i *delete;
struct bkey_i *tmp;
if (IS_ERR(delete))
return PTR_ERR(delete);
- tmp = bch2_trans_kmalloc(trans, bkey_bytes(k.k));
+ tmp = bch2_bkey_make_mut(trans, k);
if (IS_ERR(tmp))
return PTR_ERR(tmp);
- bkey_reassemble(tmp, k);
-
bkey_init(&delete->k);
delete->k.p = k_iter->pos;
return bch2_btree_iter_traverse(k_iter) ?:
bch2_trans_update(trans, k_iter, delete, 0) ?:
- bch2_hash_set(trans, desc, hash_info, k_iter->pos.inode, tmp, 0);
-#endif
-}
-
-static int fsck_hash_delete_at(struct btree_trans *trans,
- const struct bch_hash_desc desc,
- struct bch_hash_info *info,
- struct btree_iter *iter)
-{
- int ret;
-retry:
- ret = bch2_hash_delete_at(trans, desc, info, iter, 0) ?:
+ bch2_hash_set_snapshot(trans, desc, hash_info,
+ (subvol_inum) { 0, k.k->p.inode },
+ k.k->p.snapshot, tmp,
+ BCH_HASH_SET_MUST_CREATE,
+ BTREE_UPDATE_INTERNAL_SNAPSHOT_NODE) ?:
bch2_trans_commit(trans, NULL, NULL,
BTREE_INSERT_NOFAIL|
BTREE_INSERT_LAZY_RW);
- if (ret == -EINTR) {
- ret = bch2_btree_iter_traverse(iter);
- if (!ret)
- goto retry;
- }
-
- return ret;
}
static int hash_check_key(struct btree_trans *trans,
{
struct bch_fs *c = trans->c;
struct btree_iter iter = { NULL };
- char buf[200];
+ struct printbuf buf = PRINTBUF;
struct bkey_s_c k;
u64 hash;
int ret = 0;
if (hash_k.k->p.offset < hash)
goto bad_hash;
- for_each_btree_key(trans, iter, desc.btree_id, POS(hash_k.k->p.inode, hash),
- BTREE_ITER_SLOTS, k, ret) {
- if (!bkey_cmp(k.k->p, hash_k.k->p))
+ for_each_btree_key_norestart(trans, iter, desc.btree_id,
+ SPOS(hash_k.k->p.inode, hash, hash_k.k->p.snapshot),
+ BTREE_ITER_SLOTS, k, ret) {
+ if (bkey_eq(k.k->p, hash_k.k->p))
break;
if (fsck_err_on(k.k->type == desc.key_type &&
!desc.cmp_bkey(k, hash_k), c,
"duplicate hash table keys:\n%s",
- (bch2_bkey_val_to_text(&PBUF(buf), c,
- hash_k), buf))) {
- ret = fsck_hash_delete_at(trans, desc, hash_info, k_iter);
- if (ret)
- return ret;
- ret = 1;
+ (printbuf_reset(&buf),
+ bch2_bkey_val_to_text(&buf, c, hash_k),
+ buf.buf))) {
+ ret = bch2_hash_delete_at(trans, desc, hash_info, k_iter, 0) ?: 1;
break;
}
bch2_trans_iter_exit(trans, &iter);
goto bad_hash;
}
-
}
+out:
bch2_trans_iter_exit(trans, &iter);
+ printbuf_exit(&buf);
return ret;
bad_hash:
- if (fsck_err(c, "hash table key at wrong offset: btree %u inode %llu offset %llu, "
- "hashed to %llu\n%s",
- desc.btree_id, hash_k.k->p.inode, hash_k.k->p.offset, hash,
- (bch2_bkey_val_to_text(&PBUF(buf), c, hash_k), buf)) == FSCK_ERR_IGNORE)
- return 0;
-
- ret = __bch2_trans_do(trans, NULL, NULL,
- BTREE_INSERT_NOFAIL|BTREE_INSERT_LAZY_RW,
- hash_redo_key(trans, desc, hash_info, k_iter, hash_k));
- if (ret) {
- bch_err(c, "hash_redo_key err %i", ret);
- return ret;
+ if (fsck_err(c, "hash table key at wrong offset: btree %s inode %llu offset %llu, hashed to %llu\n%s",
+ bch2_btree_ids[desc.btree_id], hash_k.k->p.inode, hash_k.k->p.offset, hash,
+ (printbuf_reset(&buf),
+ bch2_bkey_val_to_text(&buf, c, hash_k), buf.buf))) {
+ ret = hash_redo_key(trans, desc, hash_info, k_iter, hash_k);
+ if (ret) {
+ bch_err(c, "hash_redo_key err %s", bch2_err_str(ret));
+ return ret;
+ }
+ ret = -BCH_ERR_transaction_restart_nested;
}
- return -EINTR;
fsck_err:
- return ret;
+ goto out;
}
static int check_inode(struct btree_trans *trans,
struct btree_iter *iter,
+ struct bkey_s_c k,
struct bch_inode_unpacked *prev,
- struct bch_inode_unpacked u)
+ struct snapshots_seen *s,
+ bool full)
{
struct bch_fs *c = trans->c;
+ struct bch_inode_unpacked u;
bool do_update = false;
- int ret = 0;
+ int ret;
+
+ ret = check_key_has_snapshot(trans, iter, k);
+ if (ret < 0)
+ goto err;
+ if (ret)
+ return 0;
+
+ ret = snapshots_seen_update(c, s, iter->btree_id, k.k->p);
+ if (ret)
+ goto err;
- if (fsck_err_on(prev &&
- (prev->bi_hash_seed != u.bi_hash_seed ||
- mode_to_type(prev->bi_mode) != mode_to_type(u.bi_mode)), c,
+ /*
+ * if snapshot id isn't a leaf node, skip it - deletion in
+ * particular is not atomic, so on the internal snapshot nodes
+ * we can see inodes marked for deletion after a clean shutdown
+ */
+ if (bch2_snapshot_internal_node(c, k.k->p.snapshot))
+ return 0;
+
+ if (!bkey_is_inode(k.k))
+ return 0;
+
+ BUG_ON(bch2_inode_unpack(k, &u));
+
+ if (!full &&
+ !(u.bi_flags & (BCH_INODE_I_SIZE_DIRTY|
+ BCH_INODE_I_SECTORS_DIRTY|
+ BCH_INODE_UNLINKED)))
+ return 0;
+
+ if (prev->bi_inum != u.bi_inum)
+ *prev = u;
+
+ if (fsck_err_on(prev->bi_hash_seed != u.bi_hash_seed ||
+ inode_d_type(prev) != inode_d_type(&u), c,
"inodes in different snapshots don't match")) {
bch_err(c, "repair not implemented yet");
return -EINVAL;
bch2_fs_lazy_rw(c);
ret = fsck_inode_rm(trans, u.bi_inum, iter->pos.snapshot);
- if (ret)
- bch_err(c, "error in fsck: error %i while deleting inode", ret);
+ if (ret && !bch2_err_matches(ret, BCH_ERR_transaction_restart))
+ bch_err(c, "error in fsck: error while deleting inode: %s",
+ bch2_err_str(ret));
return ret;
}
POS(u.bi_inum, U64_MAX),
0, NULL);
if (ret) {
- bch_err(c, "error in fsck: error %i truncating inode", ret);
+ bch_err(c, "error in fsck: error truncating inode: %s",
+ bch2_err_str(ret));
return ret;
}
sectors = bch2_count_inode_sectors(trans, u.bi_inum, iter->pos.snapshot);
if (sectors < 0) {
- bch_err(c, "error in fsck: error %i recounting inode sectors",
- (int) sectors);
+ bch_err(c, "error in fsck: error recounting inode sectors: %s",
+ bch2_err_str(sectors));
return sectors;
}
}
if (do_update) {
- ret = write_inode(trans, &u, iter->pos.snapshot);
+ ret = __write_inode(trans, &u, iter->pos.snapshot);
if (ret)
- bch_err(c, "error in fsck: error %i "
- "updating inode", ret);
+ bch_err(c, "error in fsck: error updating inode: %s",
+ bch2_err_str(ret));
}
+err:
fsck_err:
+ if (ret)
+ bch_err(c, "%s(): error %s", __func__, bch2_err_str(ret));
return ret;
}
{
struct btree_trans trans;
struct btree_iter iter;
- struct bkey_s_c k;
- struct bkey_s_c_inode inode;
- struct bch_inode_unpacked prev, u;
- int ret;
-
- memset(&prev, 0, sizeof(prev));
-
- bch2_trans_init(&trans, c, BTREE_ITER_MAX, 0);
-
- for_each_btree_key(&trans, iter, BTREE_ID_inodes, POS_MIN,
- BTREE_ITER_INTENT|
- BTREE_ITER_PREFETCH|
- BTREE_ITER_ALL_SNAPSHOTS, k, ret) {
- ret = check_key_has_snapshot(&trans, &iter, k);
- if (ret)
- break;
-
- /*
- * if snapshot id isn't a leaf node, skip it - deletion in
- * particular is not atomic, so on the internal snapshot nodes
- * we can see inodes marked for deletion after a clean shutdown
- */
- if (bch2_snapshot_internal_node(c, k.k->p.snapshot))
- continue;
-
- if (k.k->type != KEY_TYPE_inode)
- continue;
-
- inode = bkey_s_c_to_inode(k);
-
- if (!full &&
- !(inode.v->bi_flags & (BCH_INODE_I_SIZE_DIRTY|
- BCH_INODE_I_SECTORS_DIRTY|
- BCH_INODE_UNLINKED)))
- continue;
-
- BUG_ON(bch2_inode_unpack(inode, &u));
-
- ret = check_inode(&trans, &iter,
- full && prev.bi_inum == u.bi_inum
- ? &prev : NULL, u);
- if (ret)
- break;
-
- prev = u;
- }
- bch2_trans_iter_exit(&trans, &iter);
-
- BUG_ON(ret == -EINTR);
-
- return bch2_trans_exit(&trans) ?: ret;
-}
-
-noinline_for_stack
-static int check_subvols(struct bch_fs *c)
-{
- struct btree_trans trans;
- struct btree_iter iter;
+ struct bch_inode_unpacked prev = { 0 };
+ struct snapshots_seen s;
struct bkey_s_c k;
int ret;
+ snapshots_seen_init(&s);
bch2_trans_init(&trans, c, BTREE_ITER_MAX, 0);
- for_each_btree_key(&trans, iter, BTREE_ID_subvolumes, POS_MIN,
- 0, k, ret) {
- }
- bch2_trans_iter_exit(&trans, &iter);
+ ret = for_each_btree_key_commit(&trans, iter, BTREE_ID_inodes,
+ POS_MIN,
+ BTREE_ITER_PREFETCH|BTREE_ITER_ALL_SNAPSHOTS, k,
+ NULL, NULL, BTREE_INSERT_LAZY_RW|BTREE_INSERT_NOFAIL,
+ check_inode(&trans, &iter, k, &prev, &s, full));
bch2_trans_exit(&trans);
+ snapshots_seen_exit(&s);
+ if (ret)
+ bch_err(c, "%s(): error %s", __func__, bch2_err_str(ret));
return ret;
}
}
#endif
-static int inode_backpointer_exists(struct btree_trans *trans,
- struct bch_inode_unpacked *inode,
- u32 snapshot)
+static struct bkey_s_c_dirent dirent_get_by_pos(struct btree_trans *trans,
+ struct btree_iter *iter,
+ struct bpos pos)
{
- struct btree_iter iter;
struct bkey_s_c k;
- u32 target_subvol, target_snapshot;
- u64 target_inum;
int ret;
- bch2_trans_iter_init(trans, &iter, BTREE_ID_dirents,
- SPOS(inode->bi_dir, inode->bi_dir_offset, snapshot), 0);
- k = bch2_btree_iter_peek_slot(&iter);
+ bch2_trans_iter_init(trans, iter, BTREE_ID_dirents, pos, 0);
+ k = bch2_btree_iter_peek_slot(iter);
ret = bkey_err(k);
- if (ret)
- goto out;
- if (k.k->type != KEY_TYPE_dirent)
- goto out;
+ if (!ret && k.k->type != KEY_TYPE_dirent)
+ ret = -ENOENT;
+ if (ret) {
+ bch2_trans_iter_exit(trans, iter);
+ return (struct bkey_s_c_dirent) { .k = ERR_PTR(ret) };
+ }
- ret = __bch2_dirent_read_target(trans, bkey_s_c_to_dirent(k),
- &target_subvol,
- &target_snapshot,
- &target_inum,
- true);
- if (ret)
- goto out;
+ return bkey_s_c_to_dirent(k);
+}
- ret = target_inum == inode->bi_inum;
-out:
- bch2_trans_iter_exit(trans, &iter);
- return ret;
+static bool inode_points_to_dirent(struct bch_inode_unpacked *inode,
+ struct bkey_s_c_dirent d)
+{
+ return inode->bi_dir == d.k->p.inode &&
+ inode->bi_dir_offset == d.k->p.offset;
+}
+
+static bool dirent_points_to_inode(struct bkey_s_c_dirent d,
+ struct bch_inode_unpacked *inode)
+{
+ return d.v->d_type == DT_SUBVOL
+ ? le32_to_cpu(d.v->d_child_subvol) == inode->bi_subvol
+ : le64_to_cpu(d.v->d_inum) == inode->bi_inum;
}
-static bool inode_backpointer_matches(struct bkey_s_c_dirent d,
- struct bch_inode_unpacked *inode)
+static int inode_backpointer_exists(struct btree_trans *trans,
+ struct bch_inode_unpacked *inode,
+ u32 snapshot)
{
- return d.k->p.inode == inode->bi_dir &&
- d.k->p.offset == inode->bi_dir_offset;
+ struct btree_iter iter;
+ struct bkey_s_c_dirent d;
+ int ret;
+
+ d = dirent_get_by_pos(trans, &iter,
+ SPOS(inode->bi_dir, inode->bi_dir_offset, snapshot));
+ ret = bkey_err(d.s_c);
+ if (ret)
+ return ret == -ENOENT ? 0 : ret;
+
+ ret = dirent_points_to_inode(d, inode);
+ bch2_trans_iter_exit(trans, &iter);
+ return ret;
}
static int check_i_sectors(struct btree_trans *trans, struct inode_walker *w)
{
struct bch_fs *c = trans->c;
struct inode_walker_entry *i;
- int ret = 0, ret2 = 0;
+ u32 restart_count = trans->restart_count;
+ int ret = 0;
s64 count2;
- for (i = w->d; i < w->d + w->nr; i++) {
+ darray_for_each(w->inodes, i) {
if (i->inode.bi_sectors == i->count)
continue;
- count2 = lockrestart_do(trans,
- bch2_count_inode_sectors(trans, w->cur_inum, i->snapshot));
+ count2 = bch2_count_inode_sectors(trans, w->cur_inum, i->snapshot);
if (i->count != count2) {
bch_err(c, "fsck counted i_sectors wrong: got %llu should be %llu",
if (fsck_err_on(!(i->inode.bi_flags & BCH_INODE_I_SECTORS_DIRTY), c,
"inode %llu:%u has incorrect i_sectors: got %llu, should be %llu",
w->cur_inum, i->snapshot,
- i->inode.bi_sectors, i->count) == FSCK_ERR_IGNORE)
+ i->inode.bi_sectors, i->count)) {
+ i->inode.bi_sectors = i->count;
+ ret = write_inode(trans, &i->inode, i->snapshot);
+ if (ret)
+ break;
+ }
+ }
+fsck_err:
+ if (ret)
+ bch_err(c, "%s(): error %s", __func__, bch2_err_str(ret));
+ if (!ret && trans_was_restarted(trans, restart_count))
+ ret = -BCH_ERR_transaction_restart_nested;
+ return ret;
+}
+
+struct extent_end {
+ u32 snapshot;
+ u64 offset;
+ struct snapshots_seen seen;
+};
+
+typedef DARRAY(struct extent_end) extent_ends;
+
+static int check_overlapping_extents(struct btree_trans *trans,
+ struct snapshots_seen *seen,
+ extent_ends *extent_ends,
+ struct bkey_s_c k,
+ struct btree_iter *iter)
+{
+ struct bch_fs *c = trans->c;
+ struct extent_end *i;
+ struct printbuf buf = PRINTBUF;
+ int ret = 0;
+
+ darray_for_each(*extent_ends, i) {
+ /* duplicate, due to transaction restart: */
+ if (i->offset == k.k->p.offset &&
+ i->snapshot == k.k->p.snapshot)
continue;
- i->inode.bi_sectors = i->count;
- ret = write_inode(trans, &i->inode, i->snapshot);
- if (ret)
- break;
- ret2 = -EINTR;
+ if (!ref_visible2(c,
+ k.k->p.snapshot, seen,
+ i->snapshot, &i->seen))
+ continue;
+
+ if (fsck_err_on(i->offset > bkey_start_offset(k.k), c,
+ "overlapping extents: extent in snapshot %u ends at %llu overlaps with\n%s",
+ i->snapshot,
+ i->offset,
+ (printbuf_reset(&buf),
+ bch2_bkey_val_to_text(&buf, c, k), buf.buf))) {
+ struct bkey_i *update = bch2_trans_kmalloc(trans, bkey_bytes(k.k));
+ if ((ret = PTR_ERR_OR_ZERO(update)))
+ goto err;
+ bkey_reassemble(update, k);
+ ret = bch2_trans_update_extent(trans, iter, update, 0);
+ if (!ret)
+ goto err;
+ }
}
+err:
fsck_err:
- return ret ?: ret2;
+ printbuf_exit(&buf);
+ return ret;
+}
+
+static int extent_ends_at(extent_ends *extent_ends,
+ struct snapshots_seen *seen,
+ struct bkey_s_c k)
+{
+ struct extent_end *i, n = (struct extent_end) {
+ .snapshot = k.k->p.snapshot,
+ .offset = k.k->p.offset,
+ .seen = *seen,
+ };
+
+ n.seen.ids.data = kmemdup(seen->ids.data,
+ sizeof(seen->ids.data[0]) * seen->ids.size,
+ GFP_KERNEL);
+ if (!n.seen.ids.data)
+ return -ENOMEM;
+
+ darray_for_each(*extent_ends, i) {
+ if (i->snapshot == k.k->p.snapshot) {
+ snapshots_seen_exit(&i->seen);
+ *i = n;
+ return 0;
+ }
+
+ if (i->snapshot >= k.k->p.snapshot)
+ break;
+ }
+
+ return darray_insert_item(extent_ends, i - extent_ends->data, n);
+}
+
+static void extent_ends_reset(extent_ends *extent_ends)
+{
+ struct extent_end *i;
+
+ darray_for_each(*extent_ends, i)
+ snapshots_seen_exit(&i->seen);
+
+ extent_ends->nr = 0;
}
static int check_extent(struct btree_trans *trans, struct btree_iter *iter,
+ struct bkey_s_c k,
struct inode_walker *inode,
- struct snapshots_seen *s)
+ struct snapshots_seen *s,
+ extent_ends *extent_ends)
{
struct bch_fs *c = trans->c;
- struct bkey_s_c k;
struct inode_walker_entry *i;
- char buf[200];
+ struct printbuf buf = PRINTBUF;
+ struct bpos equiv;
int ret = 0;
- k = bch2_btree_iter_peek(iter);
- if (!k.k)
- return 0;
-
- ret = bkey_err(k);
- if (ret)
- return ret;
-
ret = check_key_has_snapshot(trans, iter, k);
- if (ret)
- return ret;
+ if (ret) {
+ ret = ret < 0 ? ret : 0;
+ goto out;
+ }
- ret = snapshots_seen_update(c, s, k.k->p);
+ equiv = k.k->p;
+ equiv.snapshot = bch2_snapshot_equiv(c, k.k->p.snapshot);
+
+ ret = snapshots_seen_update(c, s, iter->btree_id, k.k->p);
if (ret)
- return ret;
+ goto err;
if (k.k->type == KEY_TYPE_whiteout)
- return 0;
+ goto out;
if (inode->cur_inum != k.k->p.inode) {
ret = check_i_sectors(trans, inode);
if (ret)
- return ret;
+ goto err;
+
+ extent_ends_reset(extent_ends);
}
-#if 0
- if (bkey_cmp(prev.k->k.p, bkey_start_pos(k.k)) > 0) {
- char buf1[200];
- char buf2[200];
- bch2_bkey_val_to_text(&PBUF(buf1), c, bkey_i_to_s_c(prev.k));
- bch2_bkey_val_to_text(&PBUF(buf2), c, k);
+ BUG_ON(!iter->path->should_be_locked);
- if (fsck_err(c, "overlapping extents:\n%s\n%s", buf1, buf2))
- return fix_overlapping_extent(trans, k, prev.k->k.p) ?: -EINTR;
- }
-#endif
- ret = __walk_inode(trans, inode, k.k->p);
+ ret = check_overlapping_extents(trans, s, extent_ends, k, iter);
+ if (ret)
+ goto err;
+
+ ret = extent_ends_at(extent_ends, s, k);
+ if (ret)
+ goto err;
+
+ ret = __walk_inode(trans, inode, equiv);
if (ret < 0)
- return ret;
+ goto err;
if (fsck_err_on(ret == INT_MAX, c,
"extent in missing inode:\n %s",
- (bch2_bkey_val_to_text(&PBUF(buf), c, k), buf)))
- return __bch2_trans_do(trans, NULL, NULL, BTREE_INSERT_LAZY_RW,
- bch2_btree_delete_at(trans, iter,
- BTREE_UPDATE_INTERNAL_SNAPSHOT_NODE));
+ (printbuf_reset(&buf),
+ bch2_bkey_val_to_text(&buf, c, k), buf.buf))) {
+ ret = bch2_btree_delete_at(trans, iter,
+ BTREE_UPDATE_INTERNAL_SNAPSHOT_NODE);
+ goto out;
+ }
- if (ret == INT_MAX)
- return 0;
+ if (ret == INT_MAX) {
+ ret = 0;
+ goto out;
+ }
- i = inode->d + ret;
+ i = inode->inodes.data + ret;
ret = 0;
if (fsck_err_on(!S_ISREG(i->inode.bi_mode) &&
!S_ISLNK(i->inode.bi_mode), c,
"extent in non regular inode mode %o:\n %s",
i->inode.bi_mode,
- (bch2_bkey_val_to_text(&PBUF(buf), c, k), buf)))
- return __bch2_trans_do(trans, NULL, NULL, BTREE_INSERT_LAZY_RW,
- bch2_btree_delete_at(trans, iter,
- BTREE_UPDATE_INTERNAL_SNAPSHOT_NODE));
-
- if (!bch2_snapshot_internal_node(c, k.k->p.snapshot)) {
- for_each_visible_inode(c, s, inode, k.k->p.snapshot, i) {
- if (fsck_err_on(!(i->inode.bi_flags & BCH_INODE_I_SIZE_DIRTY) &&
- k.k->type != KEY_TYPE_reservation &&
- k.k->p.offset > round_up(i->inode.bi_size, block_bytes(c)) >> 9, c,
- "extent type %u offset %llu past end of inode %llu, i_size %llu",
- k.k->type, k.k->p.offset, k.k->p.inode, i->inode.bi_size)) {
- bch2_fs_lazy_rw(c);
- return bch2_btree_delete_range_trans(trans, BTREE_ID_extents,
- SPOS(k.k->p.inode, round_up(i->inode.bi_size, block_bytes(c)) >> 9,
- k.k->p.snapshot),
- POS(k.k->p.inode, U64_MAX),
- 0, NULL) ?: -EINTR;
+ (printbuf_reset(&buf),
+ bch2_bkey_val_to_text(&buf, c, k), buf.buf))) {
+ ret = bch2_btree_delete_at(trans, iter,
+ BTREE_UPDATE_INTERNAL_SNAPSHOT_NODE);
+ goto out;
+ }
+
+ /*
+ * Check inodes in reverse order, from oldest snapshots to newest, so
+ * that we emit the fewest number of whiteouts necessary:
+ */
+ for (i = inode->inodes.data + inode->inodes.nr - 1;
+ i >= inode->inodes.data;
+ --i) {
+ if (i->snapshot > equiv.snapshot ||
+ !key_visible_in_snapshot(c, s, i->snapshot, equiv.snapshot))
+ continue;
+
+ if (fsck_err_on(!(i->inode.bi_flags & BCH_INODE_I_SIZE_DIRTY) &&
+ k.k->p.offset > round_up(i->inode.bi_size, block_bytes(c)) >> 9 &&
+ !bkey_extent_is_reservation(k), c,
+ "extent type past end of inode %llu:%u, i_size %llu\n %s",
+ i->inode.bi_inum, i->snapshot, i->inode.bi_size,
+ (bch2_bkey_val_to_text(&buf, c, k), buf.buf))) {
+ struct btree_iter iter2;
+
+ bch2_trans_copy_iter(&iter2, iter);
+ bch2_btree_iter_set_snapshot(&iter2, i->snapshot);
+ ret = bch2_btree_iter_traverse(&iter2) ?:
+ bch2_btree_delete_at(trans, &iter2,
+ BTREE_UPDATE_INTERNAL_SNAPSHOT_NODE);
+ bch2_trans_iter_exit(trans, &iter2);
+ if (ret)
+ goto err;
+
+ if (i->snapshot != equiv.snapshot) {
+ ret = snapshots_seen_add(c, s, i->snapshot);
+ if (ret)
+ goto err;
}
}
}
if (bkey_extent_is_allocation(k.k))
- for_each_visible_inode(c, s, inode, k.k->p.snapshot, i)
+ for_each_visible_inode(c, s, inode, equiv.snapshot, i)
i->count += k.k->size;
#if 0
bch2_bkey_buf_reassemble(&prev, c, k);
#endif
+out:
+err:
fsck_err:
+ printbuf_exit(&buf);
+
+ if (ret && !bch2_err_matches(ret, BCH_ERR_transaction_restart))
+ bch_err(c, "%s(): error %s", __func__, bch2_err_str(ret));
return ret;
}
struct snapshots_seen s;
struct btree_trans trans;
struct btree_iter iter;
+ struct bkey_s_c k;
+ extent_ends extent_ends = { 0 };
int ret = 0;
-#if 0
- struct bkey_buf prev;
- bch2_bkey_buf_init(&prev);
- prev.k->k = KEY(0, 0, 0);
-#endif
snapshots_seen_init(&s);
bch2_trans_init(&trans, c, BTREE_ITER_MAX, 0);
bch_verbose(c, "checking extents");
- bch2_trans_iter_init(&trans, &iter, BTREE_ID_extents,
- POS(BCACHEFS_ROOT_INO, 0),
- BTREE_ITER_INTENT|
- BTREE_ITER_PREFETCH|
- BTREE_ITER_ALL_SNAPSHOTS);
+ ret = for_each_btree_key_commit(&trans, iter, BTREE_ID_extents,
+ POS(BCACHEFS_ROOT_INO, 0),
+ BTREE_ITER_PREFETCH|BTREE_ITER_ALL_SNAPSHOTS, k,
+ NULL, NULL,
+ BTREE_INSERT_LAZY_RW|BTREE_INSERT_NOFAIL,
+ check_extent(&trans, &iter, k, &w, &s, &extent_ends));
- do {
- ret = lockrestart_do(&trans,
- check_extent(&trans, &iter, &w, &s));
- if (ret)
- break;
- } while (bch2_btree_iter_advance(&iter));
- bch2_trans_iter_exit(&trans, &iter);
-#if 0
- bch2_bkey_buf_exit(&prev, c);
-#endif
+ extent_ends_reset(&extent_ends);
+ darray_exit(&extent_ends);
inode_walker_exit(&w);
bch2_trans_exit(&trans);
snapshots_seen_exit(&s);
+ if (ret)
+ bch_err(c, "%s(): error %s", __func__, bch2_err_str(ret));
return ret;
}
{
struct bch_fs *c = trans->c;
struct inode_walker_entry *i;
- int ret = 0, ret2 = 0;
+ u32 restart_count = trans->restart_count;
+ int ret = 0;
s64 count2;
- for (i = w->d; i < w->d + w->nr; i++) {
+ darray_for_each(w->inodes, i) {
if (i->inode.bi_nlink == i->count)
continue;
- count2 = lockrestart_do(trans,
- bch2_count_subdirs(trans, w->cur_inum, i->snapshot));
+ count2 = bch2_count_subdirs(trans, w->cur_inum, i->snapshot);
+ if (count2 < 0)
+ return count2;
if (i->count != count2) {
bch_err(c, "fsck counted subdirectories wrong: got %llu should be %llu",
ret = write_inode(trans, &i->inode, i->snapshot);
if (ret)
break;
- ret2 = -EINTR;
}
}
fsck_err:
- return ret ?: ret2;
+ if (ret)
+ bch_err(c, "%s(): error %s", __func__, bch2_err_str(ret));
+ if (!ret && trans_was_restarted(trans, restart_count))
+ ret = -BCH_ERR_transaction_restart_nested;
+ return ret;
}
static int check_dirent_target(struct btree_trans *trans,
u32 target_snapshot)
{
struct bch_fs *c = trans->c;
+ struct bkey_i_dirent *n;
bool backpointer_exists = true;
- char buf[200];
+ struct printbuf buf = PRINTBUF;
int ret = 0;
if (!target->bi_dir &&
target->bi_dir = d.k->p.inode;
target->bi_dir_offset = d.k->p.offset;
- ret = write_inode(trans, target, target_snapshot);
+ ret = __write_inode(trans, target, target_snapshot);
if (ret)
goto err;
}
- if (!inode_backpointer_matches(d, target)) {
+ if (!inode_points_to_dirent(target, d)) {
ret = inode_backpointer_exists(trans, target, d.k->p.snapshot);
if (ret < 0)
goto err;
backpointer_exists, c,
"directory %llu with multiple links",
target->bi_inum)) {
- ret = remove_dirent(trans, d.k->p);
- if (ret)
- goto err;
- return 0;
+ ret = __remove_dirent(trans, d.k->p);
+ goto out;
}
if (fsck_err_on(backpointer_exists &&
!target->bi_nlink, c,
- "inode %llu has multiple links but i_nlink 0",
- target->bi_inum)) {
+ "inode %llu type %s has multiple links but i_nlink 0",
+ target->bi_inum, bch2_d_types[d.v->d_type])) {
target->bi_nlink++;
target->bi_flags &= ~BCH_INODE_UNLINKED;
- ret = write_inode(trans, target, target_snapshot);
+ ret = __write_inode(trans, target, target_snapshot);
if (ret)
goto err;
}
if (fsck_err_on(!backpointer_exists, c,
- "inode %llu has wrong backpointer:\n"
+ "inode %llu:%u has wrong backpointer:\n"
"got %llu:%llu\n"
"should be %llu:%llu",
- target->bi_inum,
+ target->bi_inum, target_snapshot,
target->bi_dir,
target->bi_dir_offset,
d.k->p.inode,
target->bi_dir = d.k->p.inode;
target->bi_dir_offset = d.k->p.offset;
- ret = write_inode(trans, target, target_snapshot);
+ ret = __write_inode(trans, target, target_snapshot);
if (ret)
goto err;
}
}
- if (fsck_err_on(vfs_d_type(d.v->d_type) != mode_to_type(target->bi_mode), c,
- "incorrect d_type: should be %u:\n%s",
- mode_to_type(target->bi_mode),
- (bch2_bkey_val_to_text(&PBUF(buf), c, d.s_c), buf))) {
- struct bkey_i_dirent *n;
+ if (fsck_err_on(d.v->d_type != inode_d_type(target), c,
+ "incorrect d_type: got %s, should be %s:\n%s",
+ bch2_d_type_str(d.v->d_type),
+ bch2_d_type_str(inode_d_type(target)),
+ (printbuf_reset(&buf),
+ bch2_bkey_val_to_text(&buf, c, d.s_c), buf.buf))) {
+ n = bch2_trans_kmalloc(trans, bkey_bytes(d.k));
+ ret = PTR_ERR_OR_ZERO(n);
+ if (ret)
+ goto err;
+
+ bkey_reassemble(&n->k_i, d.s_c);
+ n->v.d_type = inode_d_type(target);
- n = kmalloc(bkey_bytes(d.k), GFP_KERNEL);
- if (!n) {
- ret = -ENOMEM;
+ ret = bch2_trans_update(trans, iter, &n->k_i, 0);
+ if (ret)
+ goto err;
+
+ d = dirent_i_to_s_c(n);
+ }
+
+ if (d.v->d_type == DT_SUBVOL &&
+ target->bi_parent_subvol != le32_to_cpu(d.v->d_parent_subvol) &&
+ (c->sb.version < bcachefs_metadata_version_subvol_dirent ||
+ fsck_err(c, "dirent has wrong d_parent_subvol field: got %u, should be %u",
+ le32_to_cpu(d.v->d_parent_subvol),
+ target->bi_parent_subvol))) {
+ n = bch2_trans_kmalloc(trans, bkey_bytes(d.k));
+ ret = PTR_ERR_OR_ZERO(n);
+ if (ret)
goto err;
- }
bkey_reassemble(&n->k_i, d.s_c);
- n->v.d_type = mode_to_type(target->bi_mode);
+ n->v.d_parent_subvol = cpu_to_le32(target->bi_parent_subvol);
- ret = __bch2_trans_do(trans, NULL, NULL,
- BTREE_INSERT_NOFAIL|
- BTREE_INSERT_LAZY_RW,
- bch2_trans_update(trans, iter, &n->k_i, 0));
- kfree(n);
+ ret = bch2_trans_update(trans, iter, &n->k_i, 0);
if (ret)
goto err;
+
+ d = dirent_i_to_s_c(n);
}
+out:
err:
fsck_err:
+ printbuf_exit(&buf);
+
+ if (ret && !bch2_err_matches(ret, BCH_ERR_transaction_restart))
+ bch_err(c, "%s(): error %s", __func__, bch2_err_str(ret));
return ret;
}
static int check_dirent(struct btree_trans *trans, struct btree_iter *iter,
+ struct bkey_s_c k,
struct bch_hash_info *hash_info,
struct inode_walker *dir,
struct inode_walker *target,
struct snapshots_seen *s)
{
struct bch_fs *c = trans->c;
- struct bkey_s_c k;
struct bkey_s_c_dirent d;
struct inode_walker_entry *i;
- u32 target_snapshot;
- u32 target_subvol;
- u64 target_inum;
- char buf[200];
- int ret;
-
- k = bch2_btree_iter_peek(iter);
- if (!k.k)
- return 0;
-
- ret = bkey_err(k);
- if (ret)
- return ret;
+ struct printbuf buf = PRINTBUF;
+ struct bpos equiv;
+ int ret = 0;
ret = check_key_has_snapshot(trans, iter, k);
- if (ret)
- return ret;
+ if (ret) {
+ ret = ret < 0 ? ret : 0;
+ goto out;
+ }
- ret = snapshots_seen_update(c, s, k.k->p);
+ equiv = k.k->p;
+ equiv.snapshot = bch2_snapshot_equiv(c, k.k->p.snapshot);
+
+ ret = snapshots_seen_update(c, s, iter->btree_id, k.k->p);
if (ret)
- return ret;
+ goto err;
if (k.k->type == KEY_TYPE_whiteout)
- return 0;
+ goto out;
if (dir->cur_inum != k.k->p.inode) {
ret = check_subdir_count(trans, dir);
if (ret)
- return ret;
+ goto err;
}
- ret = __walk_inode(trans, dir, k.k->p);
+ BUG_ON(!iter->path->should_be_locked);
+
+ ret = __walk_inode(trans, dir, equiv);
if (ret < 0)
- return ret;
+ goto err;
if (fsck_err_on(ret == INT_MAX, c,
"dirent in nonexisting directory:\n%s",
- (bch2_bkey_val_to_text(&PBUF(buf), c, k), buf)))
- return __bch2_trans_do(trans, NULL, NULL, BTREE_INSERT_LAZY_RW,
- bch2_btree_delete_at(trans, iter,
- BTREE_UPDATE_INTERNAL_SNAPSHOT_NODE));
+ (printbuf_reset(&buf),
+ bch2_bkey_val_to_text(&buf, c, k), buf.buf))) {
+ ret = bch2_btree_delete_at(trans, iter,
+ BTREE_UPDATE_INTERNAL_SNAPSHOT_NODE);
+ goto out;
+ }
- if (ret == INT_MAX)
- return 0;
+ if (ret == INT_MAX) {
+ ret = 0;
+ goto out;
+ }
- i = dir->d + ret;
+ i = dir->inodes.data + ret;
ret = 0;
if (fsck_err_on(!S_ISDIR(i->inode.bi_mode), c,
- "dirent in non directory inode type %u:\n%s",
- mode_to_type(i->inode.bi_mode),
- (bch2_bkey_val_to_text(&PBUF(buf), c, k), buf)))
- return __bch2_trans_do(trans, NULL, NULL, 0,
- bch2_btree_delete_at(trans, iter, 0));
+ "dirent in non directory inode type %s:\n%s",
+ bch2_d_type_str(inode_d_type(&i->inode)),
+ (printbuf_reset(&buf),
+ bch2_bkey_val_to_text(&buf, c, k), buf.buf))) {
+ ret = bch2_btree_delete_at(trans, iter, 0);
+ goto out;
+ }
if (dir->first_this_inode)
- *hash_info = bch2_hash_info_init(c, &dir->d[0].inode);
+ *hash_info = bch2_hash_info_init(c, &dir->inodes.data[0].inode);
ret = hash_check_key(trans, bch2_dirent_hash_desc,
hash_info, iter, k);
if (ret < 0)
- return ret;
- if (ret) /* dirent has been deleted */
- return 0;
+ goto err;
+ if (ret) {
+ /* dirent has been deleted */
+ ret = 0;
+ goto out;
+ }
if (k.k->type != KEY_TYPE_dirent)
- return 0;
+ goto out;
d = bkey_s_c_to_dirent(k);
- ret = __bch2_dirent_read_target(trans, d,
- &target_subvol,
- &target_snapshot,
- &target_inum,
- true);
- if (ret && ret != -ENOENT)
- return ret;
+ if (d.v->d_type == DT_SUBVOL) {
+ struct bch_inode_unpacked subvol_root;
+ u32 target_subvol = le32_to_cpu(d.v->d_child_subvol);
+ u32 target_snapshot;
+ u64 target_inum;
- if (fsck_err_on(ret, c,
- "dirent points to missing subvolume %llu",
- le64_to_cpu(d.v->d_inum)))
- return remove_dirent(trans, d.k->p);
+ ret = __subvol_lookup(trans, target_subvol,
+ &target_snapshot, &target_inum);
+ if (ret && ret != -ENOENT)
+ goto err;
- if (target_subvol) {
- struct bch_inode_unpacked subvol_root;
+ if (fsck_err_on(ret, c,
+ "dirent points to missing subvolume %llu",
+ le64_to_cpu(d.v->d_child_subvol))) {
+ ret = __remove_dirent(trans, d.k->p);
+ goto err;
+ }
ret = __lookup_inode(trans, target_inum,
&subvol_root, &target_snapshot);
if (ret && ret != -ENOENT)
- return ret;
+ goto err;
if (fsck_err_on(ret, c,
"subvolume %u points to missing subvolume root %llu",
target_subvol,
target_inum)) {
bch_err(c, "repair not implemented yet");
- return -EINVAL;
+ ret = -EINVAL;
+ goto err;
}
if (fsck_err_on(subvol_root.bi_subvol != target_subvol, c,
target_inum,
subvol_root.bi_subvol, target_subvol)) {
subvol_root.bi_subvol = target_subvol;
- ret = write_inode(trans, &subvol_root, target_snapshot);
+ ret = __write_inode(trans, &subvol_root, target_snapshot);
if (ret)
- return ret;
+ goto err;
}
ret = check_dirent_target(trans, iter, d, &subvol_root,
target_snapshot);
if (ret)
- return ret;
+ goto err;
} else {
- ret = __get_visible_inodes(trans, target, s, target_inum);
+ ret = __get_visible_inodes(trans, target, s, le64_to_cpu(d.v->d_inum));
if (ret)
- return ret;
+ goto err;
- if (fsck_err_on(!target->nr, c,
- "dirent points to missing inode:\n%s",
- (bch2_bkey_val_to_text(&PBUF(buf), c,
- k), buf))) {
- ret = remove_dirent(trans, d.k->p);
+ if (fsck_err_on(!target->inodes.nr, c,
+ "dirent points to missing inode: (equiv %u)\n%s",
+ equiv.snapshot,
+ (printbuf_reset(&buf),
+ bch2_bkey_val_to_text(&buf, c, k),
+ buf.buf))) {
+ ret = __remove_dirent(trans, d.k->p);
if (ret)
- return ret;
+ goto err;
}
- for (i = target->d; i < target->d + target->nr; i++) {
+ darray_for_each(target->inodes, i) {
ret = check_dirent_target(trans, iter, d,
&i->inode, i->snapshot);
if (ret)
- return ret;
+ goto err;
}
}
if (d.v->d_type == DT_DIR)
- for_each_visible_inode(c, s, dir, d.k->p.snapshot, i)
+ for_each_visible_inode(c, s, dir, equiv.snapshot, i)
i->count++;
+out:
+err:
fsck_err:
+ printbuf_exit(&buf);
+
+ if (ret && !bch2_err_matches(ret, BCH_ERR_transaction_restart))
+ bch_err(c, "%s(): error %s", __func__, bch2_err_str(ret));
return ret;
}
struct bch_hash_info hash_info;
struct btree_trans trans;
struct btree_iter iter;
+ struct bkey_s_c k;
int ret = 0;
bch_verbose(c, "checking dirents");
snapshots_seen_init(&s);
bch2_trans_init(&trans, c, BTREE_ITER_MAX, 0);
- bch2_trans_iter_init(&trans, &iter, BTREE_ID_dirents,
- POS(BCACHEFS_ROOT_INO, 0),
- BTREE_ITER_INTENT|
- BTREE_ITER_PREFETCH|
- BTREE_ITER_ALL_SNAPSHOTS);
-
- do {
- ret = lockrestart_do(&trans,
- check_dirent(&trans, &iter, &hash_info,
- &dir, &target, &s));
- if (ret)
- break;
- } while (bch2_btree_iter_advance(&iter));
- bch2_trans_iter_exit(&trans, &iter);
+ ret = for_each_btree_key_commit(&trans, iter, BTREE_ID_dirents,
+ POS(BCACHEFS_ROOT_INO, 0),
+ BTREE_ITER_PREFETCH|BTREE_ITER_ALL_SNAPSHOTS,
+ k,
+ NULL, NULL,
+ BTREE_INSERT_LAZY_RW|BTREE_INSERT_NOFAIL,
+ check_dirent(&trans, &iter, k, &hash_info, &dir, &target, &s));
bch2_trans_exit(&trans);
snapshots_seen_exit(&s);
inode_walker_exit(&dir);
inode_walker_exit(&target);
+
+ if (ret)
+ bch_err(c, "%s(): error %s", __func__, bch2_err_str(ret));
+ return ret;
+}
+
+static int check_xattr(struct btree_trans *trans, struct btree_iter *iter,
+ struct bkey_s_c k,
+ struct bch_hash_info *hash_info,
+ struct inode_walker *inode)
+{
+ struct bch_fs *c = trans->c;
+ int ret;
+
+ ret = check_key_has_snapshot(trans, iter, k);
+ if (ret)
+ return ret;
+
+ ret = __walk_inode(trans, inode, k.k->p);
+ if (ret < 0)
+ return ret;
+
+ if (fsck_err_on(ret == INT_MAX, c,
+ "xattr for missing inode %llu",
+ k.k->p.inode))
+ return bch2_btree_delete_at(trans, iter, 0);
+
+ if (ret == INT_MAX)
+ return 0;
+
+ ret = 0;
+
+ if (inode->first_this_inode)
+ *hash_info = bch2_hash_info_init(c, &inode->inodes.data[0].inode);
+
+ ret = hash_check_key(trans, bch2_xattr_hash_desc, hash_info, iter, k);
+fsck_err:
+ if (ret && !bch2_err_matches(ret, BCH_ERR_transaction_restart))
+ bch_err(c, "%s(): error %s", __func__, bch2_err_str(ret));
return ret;
}
noinline_for_stack
static int check_xattrs(struct bch_fs *c)
{
- struct inode_walker w = inode_walker_init();
+ struct inode_walker inode = inode_walker_init();
struct bch_hash_info hash_info;
struct btree_trans trans;
struct btree_iter iter;
bch2_trans_init(&trans, c, BTREE_ITER_MAX, 0);
- bch2_trans_iter_init(&trans, &iter, BTREE_ID_xattrs,
- POS(BCACHEFS_ROOT_INO, 0),
- BTREE_ITER_INTENT|
- BTREE_ITER_PREFETCH|
- BTREE_ITER_ALL_SNAPSHOTS);
-retry:
- bch2_trans_begin(&trans);
+ ret = for_each_btree_key_commit(&trans, iter, BTREE_ID_xattrs,
+ POS(BCACHEFS_ROOT_INO, 0),
+ BTREE_ITER_PREFETCH|BTREE_ITER_ALL_SNAPSHOTS,
+ k,
+ NULL, NULL,
+ BTREE_INSERT_LAZY_RW|BTREE_INSERT_NOFAIL,
+ check_xattr(&trans, &iter, k, &hash_info, &inode));
- while ((k = bch2_btree_iter_peek(&iter)).k &&
- !(ret = bkey_err(k))) {
- ret = check_key_has_snapshot(&trans, &iter, k);
- if (ret)
- break;
-
- ret = walk_inode(&trans, &w, k.k->p);
- if (ret < 0)
- break;
-
- if (fsck_err_on(ret == INT_MAX, c,
- "xattr for missing inode %llu",
- k.k->p.inode)) {
- ret = bch2_btree_delete_at(&trans, &iter, 0);
- if (ret)
- break;
- continue;
- }
-
- if (ret == INT_MAX)
- goto next;
- ret = 0;
-
- if (w.first_this_inode)
- hash_info = bch2_hash_info_init(c, &w.d[0].inode);
-
- ret = hash_check_key(&trans, bch2_xattr_hash_desc,
- &hash_info, &iter, k);
- if (ret)
- break;
-next:
- bch2_btree_iter_advance(&iter);
- }
-fsck_err:
- if (ret == -EINTR)
- goto retry;
+ bch2_trans_exit(&trans);
- bch2_trans_iter_exit(&trans, &iter);
- return bch2_trans_exit(&trans) ?: ret;
+ if (ret)
+ bch_err(c, "%s(): error %s", __func__, bch2_err_str(ret));
+ return ret;
}
-/* Get root directory, create if it doesn't exist: */
-static int check_root(struct bch_fs *c)
+static int check_root_trans(struct btree_trans *trans)
{
- struct btree_trans trans;
+ struct bch_fs *c = trans->c;
struct bch_inode_unpacked root_inode;
u32 snapshot;
u64 inum;
int ret;
- bch2_trans_init(&trans, c, 0, 0);
-
- bch_verbose(c, "checking root directory");
-
- ret = subvol_lookup(&trans, BCACHEFS_ROOT_SUBVOL, &snapshot, &inum);
+ ret = __subvol_lookup(trans, BCACHEFS_ROOT_SUBVOL, &snapshot, &inum);
if (ret && ret != -ENOENT)
return ret;
root_subvol.v.flags = 0;
root_subvol.v.snapshot = cpu_to_le32(snapshot);
root_subvol.v.inode = cpu_to_le64(inum);
- ret = __bch2_trans_do(&trans, NULL, NULL,
+ ret = commit_do(trans, NULL, NULL,
BTREE_INSERT_NOFAIL|
BTREE_INSERT_LAZY_RW,
- __bch2_btree_insert(&trans, BTREE_ID_subvolumes, &root_subvol.k_i));
+ __bch2_btree_insert(trans, BTREE_ID_subvolumes,
+ &root_subvol.k_i, 0));
if (ret) {
- bch_err(c, "error writing root subvol: %i", ret);
+ bch_err(c, "error writing root subvol: %s", bch2_err_str(ret));
goto err;
}
}
- ret = lookup_inode(&trans, BCACHEFS_ROOT_INO, &root_inode, &snapshot);
+ ret = __lookup_inode(trans, BCACHEFS_ROOT_INO, &root_inode, &snapshot);
if (ret && ret != -ENOENT)
return ret;
0, NULL);
root_inode.bi_inum = inum;
- ret = write_inode(&trans, &root_inode, snapshot);
+ ret = __write_inode(trans, &root_inode, snapshot);
if (ret)
- bch_err(c, "error writing root inode: %i", ret);
+ bch_err(c, "error writing root inode: %s", bch2_err_str(ret));
}
err:
fsck_err:
- bch2_trans_exit(&trans);
return ret;
}
-struct pathbuf {
- size_t nr;
- size_t size;
+/* Get root directory, create if it doesn't exist: */
+noinline_for_stack
+static int check_root(struct bch_fs *c)
+{
+ bch_verbose(c, "checking root directory");
- struct pathbuf_entry {
- u64 inum;
- } *entries;
+ return bch2_trans_do(c, NULL, NULL,
+ BTREE_INSERT_NOFAIL|
+ BTREE_INSERT_LAZY_RW,
+ check_root_trans(&trans));
+}
+
+struct pathbuf_entry {
+ u64 inum;
+ u32 snapshot;
};
-static int path_down(struct pathbuf *p, u64 inum)
+typedef DARRAY(struct pathbuf_entry) pathbuf;
+
+static bool path_is_dup(pathbuf *p, u64 inum, u32 snapshot)
{
- if (p->nr == p->size) {
- size_t new_size = max_t(size_t, 256UL, p->size * 2);
- void *n = krealloc(p->entries,
- new_size * sizeof(p->entries[0]),
- GFP_KERNEL);
- if (!n) {
- return -ENOMEM;
- }
+ struct pathbuf_entry *i;
- p->entries = n;
- p->size = new_size;
- };
+ darray_for_each(*p, i)
+ if (i->inum == inum &&
+ i->snapshot == snapshot)
+ return true;
- p->entries[p->nr++] = (struct pathbuf_entry) {
- .inum = inum,
- };
- return 0;
+ return false;
+}
+
+static int path_down(struct bch_fs *c, pathbuf *p,
+ u64 inum, u32 snapshot)
+{
+ int ret = darray_push(p, ((struct pathbuf_entry) {
+ .inum = inum,
+ .snapshot = snapshot,
+ }));
+
+ if (ret)
+ bch_err(c, "fsck: error allocating memory for pathbuf, size %zu",
+ p->size);
+ return ret;
}
+/*
+ * Check that a given inode is reachable from the root:
+ *
+ * XXX: we should also be verifying that inodes are in the right subvolumes
+ */
static int check_path(struct btree_trans *trans,
- struct pathbuf *p,
+ pathbuf *p,
struct bch_inode_unpacked *inode,
u32 snapshot)
{
struct bch_fs *c = trans->c;
- size_t i;
int ret = 0;
- snapshot = snapshot_t(c, snapshot)->equiv;
+ snapshot = bch2_snapshot_equiv(c, snapshot);
p->nr = 0;
while (!(inode->bi_inum == BCACHEFS_ROOT_INO &&
inode->bi_subvol == BCACHEFS_ROOT_SUBVOL)) {
- if (inode->bi_parent_subvol) {
+ struct btree_iter dirent_iter;
+ struct bkey_s_c_dirent d;
+ u32 parent_snapshot = snapshot;
+
+ if (inode->bi_subvol) {
u64 inum;
ret = subvol_lookup(trans, inode->bi_parent_subvol,
- &snapshot, &inum);
+ &parent_snapshot, &inum);
if (ret)
break;
}
ret = lockrestart_do(trans,
- inode_backpointer_exists(trans, inode, snapshot));
- if (ret < 0)
+ PTR_ERR_OR_ZERO((d = dirent_get_by_pos(trans, &dirent_iter,
+ SPOS(inode->bi_dir, inode->bi_dir_offset,
+ parent_snapshot))).k));
+ if (ret && ret != -ENOENT)
break;
- if (!ret) {
- if (fsck_err(c, "unreachable inode %llu:%u, type %u nlink %u backptr %llu:%llu",
+ if (!ret && !dirent_points_to_inode(d, inode)) {
+ bch2_trans_iter_exit(trans, &dirent_iter);
+ ret = -ENOENT;
+ }
+
+ if (ret == -ENOENT) {
+ if (fsck_err(c, "unreachable inode %llu:%u, type %s nlink %u backptr %llu:%llu",
inode->bi_inum, snapshot,
- mode_to_type(inode->bi_mode),
+ bch2_d_type_str(inode_d_type(inode)),
inode->bi_nlink,
inode->bi_dir,
inode->bi_dir_offset))
ret = reattach_inode(trans, inode, snapshot);
break;
}
- ret = 0;
+
+ bch2_trans_iter_exit(trans, &dirent_iter);
if (!S_ISDIR(inode->bi_mode))
break;
- ret = path_down(p, inode->bi_inum);
+ ret = path_down(c, p, inode->bi_inum, snapshot);
if (ret) {
bch_err(c, "memory allocation failure");
return ret;
}
- for (i = 0; i < p->nr; i++) {
- if (inode->bi_dir != p->entries[i].inum)
- continue;
+ snapshot = parent_snapshot;
+
+ ret = lookup_inode(trans, inode->bi_dir, inode, &snapshot);
+ if (ret) {
+ /* Should have been caught in dirents pass */
+ bch_err(c, "error looking up parent directory: %i", ret);
+ break;
+ }
+
+ if (path_is_dup(p, inode->bi_inum, snapshot)) {
+ struct pathbuf_entry *i;
/* XXX print path */
+ bch_err(c, "directory structure loop");
+
+ darray_for_each(*p, i)
+ pr_err("%llu:%u", i->inum, i->snapshot);
+ pr_err("%llu:%u", inode->bi_inum, snapshot);
+
if (!fsck_err(c, "directory structure loop"))
return 0;
- ret = lockrestart_do(trans,
+ ret = commit_do(trans, NULL, NULL,
+ BTREE_INSERT_NOFAIL|
+ BTREE_INSERT_LAZY_RW,
remove_backpointer(trans, inode));
if (ret) {
bch_err(c, "error removing dirent: %i", ret);
}
ret = reattach_inode(trans, inode, snapshot);
- break;
- }
-
- ret = lookup_inode(trans, inode->bi_dir, inode, &snapshot);
- if (ret) {
- /* Should have been caught in dirents pass */
- bch_err(c, "error looking up parent directory: %i", ret);
- break;
}
}
fsck_err:
if (ret)
- bch_err(c, "%s: err %i", __func__, ret);
+ bch_err(c, "%s: err %s", __func__, bch2_err_str(ret));
return ret;
}
* After check_dirents(), if an inode backpointer doesn't exist that means it's
* unreachable:
*/
+noinline_for_stack
static int check_directory_structure(struct bch_fs *c)
{
struct btree_trans trans;
struct btree_iter iter;
struct bkey_s_c k;
struct bch_inode_unpacked u;
- struct pathbuf path = { 0, 0, NULL };
+ pathbuf path = { 0, };
int ret;
bch2_trans_init(&trans, c, BTREE_ITER_MAX, 0);
BTREE_ITER_INTENT|
BTREE_ITER_PREFETCH|
BTREE_ITER_ALL_SNAPSHOTS, k, ret) {
- if (k.k->type != KEY_TYPE_inode)
+ if (!bkey_is_inode(k.k))
continue;
- ret = bch2_inode_unpack(bkey_s_c_to_inode(k), &u);
+ ret = bch2_inode_unpack(k, &u);
if (ret) {
/* Should have been caught earlier in fsck: */
bch_err(c, "error unpacking inode %llu: %i", k.k->p.offset, ret);
}
bch2_trans_iter_exit(&trans, &iter);
- BUG_ON(ret == -EINTR);
+ darray_exit(&path);
- kfree(path.entries);
-
- return bch2_trans_exit(&trans) ?: ret;
+ bch2_trans_exit(&trans);
+ return ret;
}
struct nlink_table {
} *d;
};
-static int add_nlink(struct nlink_table *t, u64 inum, u32 snapshot)
+static int add_nlink(struct bch_fs *c, struct nlink_table *t,
+ u64 inum, u32 snapshot)
{
if (t->nr == t->size) {
size_t new_size = max_t(size_t, 128UL, t->size * 2);
- void *d = kvmalloc(new_size * sizeof(t->d[0]), GFP_KERNEL);
+ void *d = kvmalloc_array(new_size, sizeof(t->d[0]), GFP_KERNEL);
+
if (!d) {
+ bch_err(c, "fsck: error allocating memory for nlink_table, size %zu",
+ new_size);
return -ENOMEM;
}
struct btree_trans trans;
struct btree_iter iter;
struct bkey_s_c k;
- struct bkey_s_c_inode inode;
struct bch_inode_unpacked u;
int ret = 0;
BTREE_ITER_INTENT|
BTREE_ITER_PREFETCH|
BTREE_ITER_ALL_SNAPSHOTS, k, ret) {
- if (k.k->type != KEY_TYPE_inode)
+ if (!bkey_is_inode(k.k))
continue;
- inode = bkey_s_c_to_inode(k);
+ /* Should never fail, checked by bch2_inode_invalid: */
+ BUG_ON(bch2_inode_unpack(k, &u));
/*
* Backpointer and directory structure checks are sufficient for
* directories, since they can't have hardlinks:
*/
- if (S_ISDIR(le16_to_cpu(inode.v->bi_mode)))
+ if (S_ISDIR(le16_to_cpu(u.bi_mode)))
continue;
- /* Should never fail, checked by bch2_inode_invalid: */
- BUG_ON(bch2_inode_unpack(inode, &u));
-
if (!u.bi_nlink)
continue;
- ret = add_nlink(t, k.k->p.offset, k.k->p.snapshot);
+ ret = add_nlink(c, t, k.k->p.offset, k.k->p.snapshot);
if (ret) {
*end = k.k->p.offset;
ret = 0;
BTREE_ITER_INTENT|
BTREE_ITER_PREFETCH|
BTREE_ITER_ALL_SNAPSHOTS, k, ret) {
- ret = snapshots_seen_update(c, &s, k.k->p);
+ ret = snapshots_seen_update(c, &s, iter.btree_id, k.k->p);
if (ret)
break;
d.v->d_type != DT_SUBVOL)
inc_link(c, &s, links, range_start, range_end,
le64_to_cpu(d.v->d_inum),
- d.k->p.snapshot);
+ bch2_snapshot_equiv(c, d.k->p.snapshot));
break;
}
-
- bch2_trans_cond_resched(&trans);
}
bch2_trans_iter_exit(&trans, &iter);
return ret;
}
+static int check_nlinks_update_inode(struct btree_trans *trans, struct btree_iter *iter,
+ struct bkey_s_c k,
+ struct nlink_table *links,
+ size_t *idx, u64 range_end)
+{
+ struct bch_fs *c = trans->c;
+ struct bch_inode_unpacked u;
+ struct nlink *link = &links->d[*idx];
+ int ret = 0;
+
+ if (k.k->p.offset >= range_end)
+ return 1;
+
+ if (!bkey_is_inode(k.k))
+ return 0;
+
+ BUG_ON(bch2_inode_unpack(k, &u));
+
+ if (S_ISDIR(le16_to_cpu(u.bi_mode)))
+ return 0;
+
+ if (!u.bi_nlink)
+ return 0;
+
+ while ((cmp_int(link->inum, k.k->p.offset) ?:
+ cmp_int(link->snapshot, k.k->p.snapshot)) < 0) {
+ BUG_ON(*idx == links->nr);
+ link = &links->d[++*idx];
+ }
+
+ if (fsck_err_on(bch2_inode_nlink_get(&u) != link->count, c,
+ "inode %llu type %s has wrong i_nlink (%u, should be %u)",
+ u.bi_inum, bch2_d_types[mode_to_type(u.bi_mode)],
+ bch2_inode_nlink_get(&u), link->count)) {
+ bch2_inode_nlink_set(&u, link->count);
+ ret = __write_inode(trans, &u, k.k->p.snapshot);
+ }
+fsck_err:
+ return ret;
+}
+
noinline_for_stack
static int check_nlinks_update_hardlinks(struct bch_fs *c,
struct nlink_table *links,
struct btree_trans trans;
struct btree_iter iter;
struct bkey_s_c k;
- struct bkey_s_c_inode inode;
- struct bch_inode_unpacked u;
- struct nlink *link = links->d;
+ size_t idx = 0;
int ret = 0;
bch2_trans_init(&trans, c, BTREE_ITER_MAX, 0);
- for_each_btree_key(&trans, iter, BTREE_ID_inodes,
- POS(0, range_start),
- BTREE_ITER_INTENT|
- BTREE_ITER_PREFETCH|
- BTREE_ITER_ALL_SNAPSHOTS, k, ret) {
- if (k.k->p.offset >= range_end)
- break;
-
- if (k.k->type != KEY_TYPE_inode)
- continue;
-
- inode = bkey_s_c_to_inode(k);
- if (S_ISDIR(le16_to_cpu(inode.v->bi_mode)))
- continue;
-
- BUG_ON(bch2_inode_unpack(inode, &u));
-
- if (!u.bi_nlink)
- continue;
-
- while ((cmp_int(link->inum, k.k->p.offset) ?:
- cmp_int(link->snapshot, k.k->p.snapshot)) < 0) {
- link++;
- BUG_ON(link >= links->d + links->nr);
- }
-
- if (fsck_err_on(bch2_inode_nlink_get(&u) != link->count, c,
- "inode %llu has wrong i_nlink (type %u i_nlink %u, should be %u)",
- u.bi_inum, mode_to_type(u.bi_mode),
- bch2_inode_nlink_get(&u), link->count)) {
- bch2_inode_nlink_set(&u, link->count);
+ ret = for_each_btree_key_commit(&trans, iter, BTREE_ID_inodes,
+ POS(0, range_start),
+ BTREE_ITER_INTENT|BTREE_ITER_PREFETCH|BTREE_ITER_ALL_SNAPSHOTS, k,
+ NULL, NULL, BTREE_INSERT_LAZY_RW|BTREE_INSERT_NOFAIL,
+ check_nlinks_update_inode(&trans, &iter, k, links, &idx, range_end));
- ret = write_inode(&trans, &u, k.k->p.snapshot);
- if (ret)
- bch_err(c, "error in fsck: error %i updating inode", ret);
- }
- }
-fsck_err:
- bch2_trans_iter_exit(&trans, &iter);
bch2_trans_exit(&trans);
- if (ret)
+ if (ret < 0) {
bch_err(c, "error in fsck: btree error %i while walking inodes", ret);
+ return ret;
+ }
- return ret;
+ return 0;
}
noinline_for_stack
return ret;
}
+static int fix_reflink_p_key(struct btree_trans *trans, struct btree_iter *iter,
+ struct bkey_s_c k)
+{
+ struct bkey_s_c_reflink_p p;
+ struct bkey_i_reflink_p *u;
+ int ret;
+
+ if (k.k->type != KEY_TYPE_reflink_p)
+ return 0;
+
+ p = bkey_s_c_to_reflink_p(k);
+
+ if (!p.v->front_pad && !p.v->back_pad)
+ return 0;
+
+ u = bch2_trans_kmalloc(trans, sizeof(*u));
+ ret = PTR_ERR_OR_ZERO(u);
+ if (ret)
+ return ret;
+
+ bkey_reassemble(&u->k_i, k);
+ u->v.front_pad = 0;
+ u->v.back_pad = 0;
+
+ return bch2_trans_update(trans, iter, &u->k_i, BTREE_TRIGGER_NORUN);
+}
+
+noinline_for_stack
+static int fix_reflink_p(struct bch_fs *c)
+{
+ struct btree_trans trans;
+ struct btree_iter iter;
+ struct bkey_s_c k;
+ int ret;
+
+ if (c->sb.version >= bcachefs_metadata_version_reflink_p_fix)
+ return 0;
+
+ bch_verbose(c, "fixing reflink_p keys");
+
+ bch2_trans_init(&trans, c, BTREE_ITER_MAX, 0);
+
+ ret = for_each_btree_key_commit(&trans, iter,
+ BTREE_ID_extents, POS_MIN,
+ BTREE_ITER_INTENT|BTREE_ITER_PREFETCH|BTREE_ITER_ALL_SNAPSHOTS, k,
+ NULL, NULL, BTREE_INSERT_NOFAIL|BTREE_INSERT_LAZY_RW,
+ fix_reflink_p_key(&trans, &iter, k));
+
+ bch2_trans_exit(&trans);
+ return ret;
+}
+
/*
* Checks for inconsistencies that shouldn't happen, unless we have a bug.
* Doesn't fix them yet, mainly because they haven't yet been observed:
*/
int bch2_fsck_full(struct bch_fs *c)
{
- return bch2_fs_snapshots_check(c) ?:
+ int ret;
+again:
+ ret = bch2_fs_check_snapshots(c) ?:
+ bch2_fs_check_subvols(c) ?:
+ bch2_delete_dead_snapshots(c) ?:
check_inodes(c, true) ?:
- check_subvols(c) ?:
check_extents(c) ?:
check_dirents(c) ?:
check_xattrs(c) ?:
check_root(c) ?:
check_directory_structure(c) ?:
- check_nlinks(c);
+ check_nlinks(c) ?:
+ fix_reflink_p(c);
+
+ if (bch2_err_matches(ret, BCH_ERR_need_snapshot_cleanup)) {
+ set_bit(BCH_FS_HAVE_DELETED_SNAPSHOTS, &c->flags);
+ goto again;
+ }
+
+ return ret;
}
int bch2_fsck_walk_inodes_only(struct bch_fs *c)
{
- return check_inodes(c, false);
+ return bch2_fs_check_snapshots(c) ?:
+ bch2_fs_check_subvols(c) ?:
+ bch2_delete_dead_snapshots(c) ?:
+ check_inodes(c, false);
}
projects / bcachefs-tools-debian / blobdiff