#include "btree_cache.h"
#include "btree_update.h"
#include "buckets.h"
-#include "darray.h"
#include "dirent.h"
#include "error.h"
#include "fs-common.h"
#include "xattr.h"
#include <linux/bsearch.h>
+#include <linux/darray.h>
#include <linux/dcache.h> /* struct qstr */
/*
return ret ?: subdirs;
}
-static int __snapshot_lookup_subvol(struct btree_trans *trans, u32 snapshot,
- u32 *subvol)
-{
- struct bch_snapshot s;
- int ret = bch2_bkey_get_val_typed(trans, BTREE_ID_snapshots,
- POS(0, snapshot), 0,
- snapshot, &s);
- if (!ret)
- *subvol = le32_to_cpu(s.subvol);
- else if (bch2_err_matches(ret, ENOENT))
- bch_err(trans->c, "snapshot %u not found", snapshot);
- return ret;
-
-}
-
-static int __subvol_lookup(struct btree_trans *trans, u32 subvol,
- u32 *snapshot, u64 *inum)
+static int subvol_lookup(struct btree_trans *trans, u32 subvol,
+ u32 *snapshot, u64 *inum)
{
struct bch_subvolume s;
int ret;
return ret;
}
-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)
{
return ret;
}
-static int __lookup_inode(struct btree_trans *trans, u64 inode_nr,
- struct bch_inode_unpacked *inode,
- u32 *snapshot)
+static int lookup_inode(struct btree_trans *trans, u64 inode_nr,
+ struct bch_inode_unpacked *inode,
+ u32 *snapshot)
{
struct btree_iter iter;
struct bkey_s_c k;
if (!ret)
*snapshot = iter.pos.snapshot;
err:
- bch_err_msg(trans->c, ret, "fetching inode %llu:%u", inode_nr, *snapshot);
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)
-{
- return lockrestart_do(trans, __lookup_inode(trans, inode_nr, inode, snapshot));
-}
-
-static int __lookup_dirent(struct btree_trans *trans,
+static int lookup_dirent_in_snapshot(struct btree_trans *trans,
struct bch_hash_info hash_info,
subvol_inum dir, struct qstr *name,
- u64 *target, unsigned *type)
+ u64 *target, unsigned *type, u32 snapshot)
{
struct btree_iter iter;
struct bkey_s_c_dirent d;
- int ret;
-
- ret = bch2_hash_lookup(trans, &iter, bch2_dirent_hash_desc,
- &hash_info, dir, name, 0);
+ int ret = bch2_hash_lookup_in_snapshot(trans, &iter, bch2_dirent_hash_desc,
+ &hash_info, dir, name, 0, snapshot);
if (ret)
return ret;
return 0;
}
-static int __write_inode(struct btree_trans *trans,
- struct bch_inode_unpacked *inode,
- u32 snapshot)
-{
- struct bkey_inode_buf *inode_p =
- bch2_trans_kmalloc(trans, sizeof(*inode_p));
-
- if (IS_ERR(inode_p))
- return PTR_ERR(inode_p);
-
- bch2_inode_pack(inode_p, inode);
- inode_p->inode.k.p.snapshot = snapshot;
-
- return bch2_btree_insert_nonextent(trans, BTREE_ID_inodes,
- &inode_p->inode.k_i,
- BTREE_UPDATE_INTERNAL_SNAPSHOT_NODE);
-}
-
-static int fsck_write_inode(struct btree_trans *trans,
- struct bch_inode_unpacked *inode,
- u32 snapshot)
-{
- int ret = commit_do(trans, NULL, NULL, BCH_TRANS_COMMIT_no_enospc,
- __write_inode(trans, inode, snapshot));
- bch_err_fn(trans->c, ret);
- return ret;
-}
-
static int __remove_dirent(struct btree_trans *trans, struct bpos pos)
{
struct bch_fs *c = trans->c;
}
/* Get lost+found, create if it doesn't exist: */
-static int lookup_lostfound(struct btree_trans *trans, u32 subvol,
+static int lookup_lostfound(struct btree_trans *trans, u32 snapshot,
struct bch_inode_unpacked *lostfound)
{
struct bch_fs *c = trans->c;
- struct bch_inode_unpacked root;
- struct bch_hash_info root_hash_info;
struct qstr lostfound_str = QSTR("lost+found");
- subvol_inum root_inum = { .subvol = subvol };
u64 inum = 0;
unsigned d_type = 0;
- u32 snapshot;
int ret;
- ret = __subvol_lookup(trans, subvol, &snapshot, &root_inum.inum);
+ struct bch_snapshot_tree st;
+ ret = bch2_snapshot_tree_lookup(trans,
+ bch2_snapshot_tree(c, snapshot), &st);
if (ret)
return ret;
- ret = __lookup_inode(trans, root_inum.inum, &root, &snapshot);
+ subvol_inum root_inum = { .subvol = le32_to_cpu(st.master_subvol) };
+ u32 subvol_snapshot;
+
+ ret = subvol_lookup(trans, le32_to_cpu(st.master_subvol),
+ &subvol_snapshot, &root_inum.inum);
+ bch_err_msg(c, ret, "looking up root subvol");
if (ret)
return ret;
- root_hash_info = bch2_hash_info_init(c, &root);
+ struct bch_inode_unpacked root_inode;
+ struct bch_hash_info root_hash_info;
+ u32 root_inode_snapshot = snapshot;
+ ret = lookup_inode(trans, root_inum.inum, &root_inode, &root_inode_snapshot);
+ bch_err_msg(c, ret, "looking up root inode");
+ if (ret)
+ return ret;
- ret = __lookup_dirent(trans, root_hash_info, root_inum,
- &lostfound_str, &inum, &d_type);
- if (bch2_err_matches(ret, ENOENT)) {
- bch_notice(c, "creating lost+found");
+ root_hash_info = bch2_hash_info_init(c, &root_inode);
+
+ ret = lookup_dirent_in_snapshot(trans, root_hash_info, root_inum,
+ &lostfound_str, &inum, &d_type, snapshot);
+ if (bch2_err_matches(ret, ENOENT))
goto create_lostfound;
- }
bch_err_fn(c, ret);
if (ret)
* The bch2_check_dirents pass has already run, dangling dirents
* shouldn't exist here:
*/
- return __lookup_inode(trans, inum, lostfound, &snapshot);
+ ret = lookup_inode(trans, inum, lostfound, &snapshot);
+ bch_err_msg(c, ret, "looking up lost+found %llu:%u in (root inode %llu, snapshot root %u)",
+ inum, snapshot, root_inum.inum, bch2_snapshot_root(c, snapshot));
+ return ret;
create_lostfound:
+ /*
+ * XXX: we could have a nicer log message here if we had a nice way to
+ * walk backpointers to print a path
+ */
+ bch_notice(c, "creating lost+found in snapshot %u", le32_to_cpu(st.root_snapshot));
+
+ u64 now = bch2_current_time(c);
+ struct btree_iter lostfound_iter = { NULL };
+ u64 cpu = raw_smp_processor_id();
+
bch2_inode_init_early(c, lostfound);
+ bch2_inode_init_late(lostfound, now, 0, 0, S_IFDIR|0700, 0, &root_inode);
+ lostfound->bi_dir = root_inode.bi_inum;
+
+ root_inode.bi_nlink++;
+
+ ret = bch2_inode_create(trans, &lostfound_iter, lostfound, snapshot, cpu);
+ if (ret)
+ goto err;
- ret = bch2_create_trans(trans, root_inum, &root,
- lostfound, &lostfound_str,
- 0, 0, S_IFDIR|0700, 0, NULL, NULL,
- (subvol_inum) { }, 0);
+ bch2_btree_iter_set_snapshot(&lostfound_iter, snapshot);
+ ret = bch2_btree_iter_traverse(&lostfound_iter);
+ if (ret)
+ goto err;
+
+ ret = bch2_dirent_create_snapshot(trans,
+ 0, root_inode.bi_inum, snapshot, &root_hash_info,
+ mode_to_type(lostfound->bi_mode),
+ &lostfound_str,
+ lostfound->bi_inum,
+ &lostfound->bi_dir_offset,
+ BCH_HASH_SET_MUST_CREATE) ?:
+ bch2_inode_write_flags(trans, &lostfound_iter, lostfound,
+ BTREE_UPDATE_INTERNAL_SNAPSHOT_NODE);
+err:
bch_err_msg(c, ret, "creating lost+found");
+ bch2_trans_iter_exit(trans, &lostfound_iter);
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)
{
char name_buf[20];
struct qstr name;
u64 dir_offset = 0;
- u32 subvol;
+ u32 dirent_snapshot = inode_snapshot;
int ret;
- ret = __snapshot_lookup_subvol(trans, inode_snapshot, &subvol);
- if (ret)
- return ret;
+ if (inode->bi_subvol) {
+ inode->bi_parent_subvol = BCACHEFS_ROOT_SUBVOL;
+
+ u64 root_inum;
+ ret = subvol_lookup(trans, inode->bi_parent_subvol,
+ &dirent_snapshot, &root_inum);
+ if (ret)
+ return ret;
- ret = lookup_lostfound(trans, subvol, &lostfound);
+ snprintf(name_buf, sizeof(name_buf), "subvol-%u", inode->bi_subvol);
+ } else {
+ snprintf(name_buf, sizeof(name_buf), "%llu", inode->bi_inum);
+ }
+
+ ret = lookup_lostfound(trans, dirent_snapshot, &lostfound);
if (ret)
return ret;
if (S_ISDIR(inode->bi_mode)) {
lostfound.bi_nlink++;
- ret = __write_inode(trans, &lostfound, U32_MAX);
+ ret = __bch2_fsck_write_inode(trans, &lostfound, U32_MAX);
if (ret)
return ret;
}
dir_hash = bch2_hash_info_init(trans->c, &lostfound);
- snprintf(name_buf, sizeof(name_buf), "%llu", inode->bi_inum);
name = (struct qstr) QSTR(name_buf);
- 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);
+ ret = bch2_dirent_create_snapshot(trans,
+ inode->bi_parent_subvol, lostfound.bi_inum,
+ dirent_snapshot,
+ &dir_hash,
+ inode_d_type(inode),
+ &name,
+ inode->bi_subvol ?: 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);
-}
-
-static int reattach_inode(struct btree_trans *trans,
- struct bch_inode_unpacked *inode,
- u32 inode_snapshot)
-{
- int ret = commit_do(trans, NULL, NULL, BCH_TRANS_COMMIT_no_enospc,
- __reattach_inode(trans, inode, inode_snapshot));
- bch_err_msg(trans->c, ret, "reattaching inode %llu", inode->bi_inum);
- return ret;
+ return __bch2_fsck_write_inode(trans, inode, inode_snapshot);
}
static int remove_backpointer(struct btree_trans *trans,
}
static struct inode_walker_entry *
-lookup_inode_for_snapshot(struct bch_fs *c, struct inode_walker *w,
- u32 snapshot, bool is_whiteout)
+lookup_inode_for_snapshot(struct bch_fs *c, struct inode_walker *w, struct bkey_s_c k)
{
- struct inode_walker_entry *i;
-
- snapshot = bch2_snapshot_equiv(c, snapshot);
+ bool is_whiteout = k.k->type == KEY_TYPE_whiteout;
+ u32 snapshot = bch2_snapshot_equiv(c, k.k->p.snapshot);
+ struct inode_walker_entry *i;
__darray_for_each(w->inodes, i)
if (bch2_snapshot_is_ancestor(c, snapshot, i->snapshot))
goto found;
if (snapshot != i->snapshot && !is_whiteout) {
struct inode_walker_entry new = *i;
- size_t pos;
- int ret;
new.snapshot = snapshot;
new.count = 0;
- bch_info(c, "have key for inode %llu:%u but have inode in ancestor snapshot %u",
- w->last_pos.inode, snapshot, i->snapshot);
+ struct printbuf buf = PRINTBUF;
+ bch2_bkey_val_to_text(&buf, c, k);
+
+ bch_info(c, "have key for inode %llu:%u but have inode in ancestor snapshot %u\n"
+ "unexpected because we should always update the inode when we update a key in that inode\n"
+ "%s",
+ w->last_pos.inode, snapshot, i->snapshot, buf.buf);
+ printbuf_exit(&buf);
while (i > w->inodes.data && i[-1].snapshot > snapshot)
--i;
- pos = i - w->inodes.data;
- ret = darray_insert_item(&w->inodes, pos, new);
+ size_t pos = i - w->inodes.data;
+ int ret = darray_insert_item(&w->inodes, pos, new);
if (ret)
return ERR_PTR(ret);
}
static struct inode_walker_entry *walk_inode(struct btree_trans *trans,
- struct inode_walker *w, struct bpos pos,
- bool is_whiteout)
+ struct inode_walker *w,
+ struct bkey_s_c k)
{
- if (w->last_pos.inode != pos.inode) {
- int ret = get_inodes_all_snapshots(trans, w, pos.inode);
+ if (w->last_pos.inode != k.k->p.inode) {
+ int ret = get_inodes_all_snapshots(trans, w, k.k->p.inode);
if (ret)
return ERR_PTR(ret);
- } else if (bkey_cmp(w->last_pos, pos)) {
+ } else if (bkey_cmp(w->last_pos, k.k->p)) {
darray_for_each(w->inodes, i)
i->seen_this_pos = false;
}
- w->last_pos = pos;
+ w->last_pos = k.k->p;
- return lookup_inode_for_snapshot(trans->c, w, pos.snapshot, is_whiteout);
+ return lookup_inode_for_snapshot(trans->c, w, k);
}
static int __get_visible_inodes(struct btree_trans *trans,
delete->k.p = k_iter->pos;
return bch2_btree_iter_traverse(k_iter) ?:
bch2_trans_update(trans, k_iter, delete, 0) ?:
- bch2_hash_set_snapshot(trans, desc, hash_info,
+ bch2_hash_set_in_snapshot(trans, desc, hash_info,
(subvol_inum) { 0, k.k->p.inode },
k.k->p.snapshot, tmp,
BCH_HASH_SET_MUST_CREATE,
goto out;
}
+static struct bkey_s_c_dirent dirent_get_by_pos(struct btree_trans *trans,
+ struct btree_iter *iter,
+ struct bpos pos)
+{
+ return bch2_bkey_get_iter_typed(trans, iter, BTREE_ID_dirents, pos, 0, dirent);
+}
+
+static struct bkey_s_c_dirent inode_get_dirent(struct btree_trans *trans,
+ struct btree_iter *iter,
+ struct bch_inode_unpacked *inode,
+ u32 *snapshot)
+{
+ if (inode->bi_subvol) {
+ u64 inum;
+ int ret = subvol_lookup(trans, inode->bi_parent_subvol, snapshot, &inum);
+ if (ret)
+ return ((struct bkey_s_c_dirent) { .k = ERR_PTR(ret) });
+ }
+
+ return dirent_get_by_pos(trans, iter, SPOS(inode->bi_dir, inode->bi_dir_offset, *snapshot));
+}
+
+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 int check_inode_deleted_list(struct btree_trans *trans, struct bpos p)
{
struct btree_iter iter;
return k.k->type == KEY_TYPE_set;
}
+static int check_inode_dirent_inode(struct btree_trans *trans, struct bkey_s_c inode_k,
+ struct bch_inode_unpacked *inode,
+ u32 inode_snapshot, bool *write_inode)
+{
+ struct bch_fs *c = trans->c;
+ struct printbuf buf = PRINTBUF;
+
+ struct btree_iter dirent_iter = {};
+ struct bkey_s_c_dirent d = inode_get_dirent(trans, &dirent_iter, inode, &inode_snapshot);
+ int ret = bkey_err(d);
+ if (ret && !bch2_err_matches(ret, ENOENT))
+ return ret;
+
+ if (fsck_err_on(ret,
+ c, inode_points_to_missing_dirent,
+ "inode points to missing dirent\n%s",
+ (bch2_bkey_val_to_text(&buf, c, inode_k), buf.buf)) ||
+ fsck_err_on(!ret && !dirent_points_to_inode(d, inode),
+ c, inode_points_to_wrong_dirent,
+ "inode points to dirent that does not point back:\n%s",
+ (bch2_bkey_val_to_text(&buf, c, inode_k),
+ prt_newline(&buf),
+ bch2_bkey_val_to_text(&buf, c, d.s_c), buf.buf))) {
+ /*
+ * We just clear the backpointer fields for now. If we find a
+ * dirent that points to this inode in check_dirents(), we'll
+ * update it then; then when we get to check_path() if the
+ * backpointer is still 0 we'll reattach it.
+ */
+ inode->bi_dir = 0;
+ inode->bi_dir_offset = 0;
+ inode->bi_flags &= ~BCH_INODE_backptr_untrusted;
+ *write_inode = true;
+ }
+
+ ret = 0;
+fsck_err:
+ bch2_trans_iter_exit(trans, &dirent_iter);
+ printbuf_exit(&buf);
+ bch_err_fn(c, ret);
+ return ret;
+}
+
static int check_inode(struct btree_trans *trans,
struct btree_iter *iter,
struct bkey_s_c k,
u.bi_flags &= ~BCH_INODE_i_size_dirty|BCH_INODE_unlinked;
- ret = __write_inode(trans, &u, iter->pos.snapshot);
+ ret = __bch2_fsck_write_inode(trans, &u, iter->pos.snapshot);
+
bch_err_msg(c, ret, "in fsck updating inode");
if (ret)
return ret;
return 0;
}
- if (u.bi_flags & BCH_INODE_unlinked &&
- c->sb.version >= bcachefs_metadata_version_deleted_inodes) {
+ if (u.bi_flags & BCH_INODE_unlinked) {
ret = check_inode_deleted_list(trans, k.k->p);
if (ret < 0)
return ret;
do_update = true;
}
+ if (u.bi_dir || u.bi_dir_offset) {
+ ret = check_inode_dirent_inode(trans, k, &u, k.k->p.snapshot, &do_update);
+ if (ret)
+ goto err;
+ }
+
+ if (fsck_err_on(u.bi_parent_subvol &&
+ (u.bi_subvol == 0 ||
+ u.bi_subvol == BCACHEFS_ROOT_SUBVOL),
+ c, inode_bi_parent_nonzero,
+ "inode %llu:%u has subvol %u but nonzero parent subvol %u",
+ u.bi_inum, k.k->p.snapshot, u.bi_subvol, u.bi_parent_subvol)) {
+ u.bi_parent_subvol = 0;
+ do_update = true;
+ }
+
+ if (u.bi_subvol) {
+ struct bch_subvolume s;
+
+ ret = bch2_subvolume_get(trans, u.bi_subvol, false, 0, &s);
+ if (ret && !bch2_err_matches(ret, ENOENT))
+ goto err;
+
+ if (fsck_err_on(ret,
+ c, inode_bi_subvol_missing,
+ "inode %llu:%u bi_subvol points to missing subvolume %u",
+ u.bi_inum, k.k->p.snapshot, u.bi_subvol) ||
+ fsck_err_on(le64_to_cpu(s.inode) != u.bi_inum ||
+ !bch2_snapshot_is_ancestor(c, le32_to_cpu(s.snapshot),
+ k.k->p.snapshot),
+ c, inode_bi_subvol_wrong,
+ "inode %llu:%u points to subvol %u, but subvol points to %llu:%u",
+ u.bi_inum, k.k->p.snapshot, u.bi_subvol,
+ le64_to_cpu(s.inode),
+ le32_to_cpu(s.snapshot))) {
+ u.bi_subvol = 0;
+ u.bi_parent_subvol = 0;
+ do_update = true;
+ }
+ }
+
if (do_update) {
- ret = __write_inode(trans, &u, iter->pos.snapshot);
+ ret = __bch2_fsck_write_inode(trans, &u, iter->pos.snapshot);
bch_err_msg(c, ret, "in fsck updating inode");
if (ret)
return ret;
return ret;
}
-static struct bkey_s_c_dirent dirent_get_by_pos(struct btree_trans *trans,
- struct btree_iter *iter,
- struct bpos pos)
-{
- return bch2_bkey_get_iter_typed(trans, iter, BTREE_ID_dirents, pos, 0, dirent);
-}
-
-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 int check_i_sectors(struct btree_trans *trans, struct inode_walker *w)
{
struct bch_fs *c = trans->c;
w->last_pos.inode, i->snapshot,
i->inode.bi_sectors, i->count)) {
i->inode.bi_sectors = i->count;
- ret = fsck_write_inode(trans, &i->inode, i->snapshot);
+ ret = bch2_fsck_write_inode(trans, &i->inode, i->snapshot);
if (ret)
break;
}
goto err;
}
- i = walk_inode(trans, inode, equiv, k.k->type == KEY_TYPE_whiteout);
+ i = walk_inode(trans, inode, k);
ret = PTR_ERR_OR_ZERO(i);
if (ret)
goto err;
"directory %llu:%u with wrong i_nlink: got %u, should be %llu",
w->last_pos.inode, i->snapshot, i->inode.bi_nlink, i->count)) {
i->inode.bi_nlink = i->count;
- ret = fsck_write_inode(trans, &i->inode, i->snapshot);
+ ret = bch2_fsck_write_inode(trans, &i->inode, i->snapshot);
if (ret)
break;
}
return ret ?: trans_was_restarted(trans, restart_count);
}
-static int check_dirent_target(struct btree_trans *trans,
- struct btree_iter *iter,
- struct bkey_s_c_dirent d,
- struct bch_inode_unpacked *target,
- u32 target_snapshot)
+static int check_dirent_inode_dirent(struct btree_trans *trans,
+ struct btree_iter *iter,
+ struct bkey_s_c_dirent d,
+ struct bch_inode_unpacked *target,
+ u32 target_snapshot)
{
struct bch_fs *c = trans->c;
- struct bkey_i_dirent *n;
struct printbuf buf = PRINTBUF;
- struct btree_iter bp_iter = { NULL };
int ret = 0;
+ if (inode_points_to_dirent(target, d))
+ return 0;
+
if (!target->bi_dir &&
!target->bi_dir_offset) {
target->bi_dir = d.k->p.inode;
target->bi_dir_offset = d.k->p.offset;
-
- ret = __write_inode(trans, target, target_snapshot);
- if (ret)
- goto err;
+ return __bch2_fsck_write_inode(trans, target, target_snapshot);
}
- if (!inode_points_to_dirent(target, d)) {
- struct bkey_s_c_dirent bp_dirent = dirent_get_by_pos(trans, &bp_iter,
- SPOS(target->bi_dir, target->bi_dir_offset, target_snapshot));
- ret = bkey_err(bp_dirent);
- if (ret && !bch2_err_matches(ret, ENOENT))
- goto err;
+ struct btree_iter bp_iter = { NULL };
+ struct bkey_s_c_dirent bp_dirent = dirent_get_by_pos(trans, &bp_iter,
+ SPOS(target->bi_dir, target->bi_dir_offset, target_snapshot));
+ ret = bkey_err(bp_dirent);
+ if (ret && !bch2_err_matches(ret, ENOENT))
+ goto err;
- bool backpointer_exists = !ret;
- ret = 0;
+ bool backpointer_exists = !ret;
+ ret = 0;
+
+ if (fsck_err_on(!backpointer_exists,
+ c, inode_wrong_backpointer,
+ "inode %llu:%u has wrong backpointer:\n"
+ "got %llu:%llu\n"
+ "should be %llu:%llu",
+ target->bi_inum, target_snapshot,
+ target->bi_dir,
+ target->bi_dir_offset,
+ d.k->p.inode,
+ d.k->p.offset)) {
+ target->bi_dir = d.k->p.inode;
+ target->bi_dir_offset = d.k->p.offset;
+ ret = __bch2_fsck_write_inode(trans, target, target_snapshot);
+ goto out;
+ }
- bch2_bkey_val_to_text(&buf, c, d.s_c);
- prt_newline(&buf);
- if (backpointer_exists)
- bch2_bkey_val_to_text(&buf, c, bp_dirent.s_c);
+ bch2_bkey_val_to_text(&buf, c, d.s_c);
+ prt_newline(&buf);
+ if (backpointer_exists)
+ bch2_bkey_val_to_text(&buf, c, bp_dirent.s_c);
+
+ if (fsck_err_on(backpointer_exists &&
+ (S_ISDIR(target->bi_mode) ||
+ target->bi_subvol),
+ c, inode_dir_multiple_links,
+ "%s %llu:%u with multiple links\n%s",
+ S_ISDIR(target->bi_mode) ? "directory" : "subvolume",
+ target->bi_inum, target_snapshot, buf.buf)) {
+ ret = __remove_dirent(trans, d.k->p);
+ goto out;
+ }
- if (fsck_err_on(S_ISDIR(target->bi_mode) && backpointer_exists,
- c, inode_dir_multiple_links,
- "directory %llu:%u with multiple links\n%s",
- target->bi_inum, target_snapshot, buf.buf)) {
- ret = __remove_dirent(trans, d.k->p);
- goto out;
- }
+ /*
+ * hardlinked file with nlink 0:
+ * We're just adjusting nlink here so check_nlinks() will pick
+ * it up, it ignores inodes with nlink 0
+ */
+ if (fsck_err_on(backpointer_exists && !target->bi_nlink,
+ c, inode_multiple_links_but_nlink_0,
+ "inode %llu:%u type %s has multiple links but i_nlink 0\n%s",
+ target->bi_inum, target_snapshot, bch2_d_types[d.v->d_type], buf.buf)) {
+ target->bi_nlink++;
+ target->bi_flags &= ~BCH_INODE_unlinked;
+ ret = __bch2_fsck_write_inode(trans, target, target_snapshot);
+ if (ret)
+ goto err;
+ }
+out:
+err:
+fsck_err:
+ bch2_trans_iter_exit(trans, &bp_iter);
+ printbuf_exit(&buf);
+ bch_err_fn(c, ret);
+ return ret;
+}
- /*
- * hardlinked file with nlink 0:
- * We're just adjusting nlink here so check_nlinks() will pick
- * it up, it ignores inodes with nlink 0
- */
- if (fsck_err_on(backpointer_exists && !target->bi_nlink,
- c, inode_multiple_links_but_nlink_0,
- "inode %llu:%u type %s has multiple links but i_nlink 0\n%s",
- target->bi_inum, target_snapshot, bch2_d_types[d.v->d_type], buf.buf)) {
- target->bi_nlink++;
- target->bi_flags &= ~BCH_INODE_unlinked;
-
- ret = __write_inode(trans, target, target_snapshot);
- if (ret)
- goto err;
- }
+static int check_dirent_target(struct btree_trans *trans,
+ struct btree_iter *iter,
+ struct bkey_s_c_dirent d,
+ struct bch_inode_unpacked *target,
+ u32 target_snapshot)
+{
+ struct bch_fs *c = trans->c;
+ struct bkey_i_dirent *n;
+ struct printbuf buf = PRINTBUF;
+ int ret = 0;
- if (fsck_err_on(!backpointer_exists,
- c, inode_wrong_backpointer,
- "inode %llu:%u has wrong backpointer:\n"
- "got %llu:%llu\n"
- "should be %llu:%llu",
- target->bi_inum, target_snapshot,
- target->bi_dir,
- target->bi_dir_offset,
- d.k->p.inode,
- d.k->p.offset)) {
- target->bi_dir = d.k->p.inode;
- target->bi_dir_offset = d.k->p.offset;
-
- ret = __write_inode(trans, target, target_snapshot);
- if (ret)
- goto err;
- }
- }
+ ret = check_dirent_inode_dirent(trans, iter, d, target, target_snapshot);
+ if (ret)
+ goto err;
if (fsck_err_on(d.v->d_type != inode_d_type(target),
c, dirent_d_type_wrong,
bkey_reassemble(&n->k_i, d.s_c);
n->v.d_type = inode_d_type(target);
+ if (n->v.d_type == DT_SUBVOL) {
+ n->v.d_parent_subvol = target->bi_parent_subvol;
+ n->v.d_child_subvol = target->bi_subvol;
+ } else {
+ n->v.d_inum = target->bi_inum;
+ }
ret = bch2_trans_update(trans, iter, &n->k_i, 0);
if (ret)
d = dirent_i_to_s_c(n);
}
+err:
+fsck_err:
+ printbuf_exit(&buf);
+ bch_err_fn(c, ret);
+ return ret;
+}
- 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_d_parent_subvol_wrong,
- "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);
+/* find a subvolume that's a descendent of @snapshot: */
+static int find_snapshot_subvol(struct btree_trans *trans, u32 snapshot, u32 *subvolid)
+{
+ struct btree_iter iter;
+ struct bkey_s_c k;
+ int ret;
+
+ for_each_btree_key_norestart(trans, iter, BTREE_ID_subvolumes, POS_MIN, 0, k, ret) {
+ if (k.k->type != KEY_TYPE_subvolume)
+ continue;
+
+ struct bkey_s_c_subvolume s = bkey_s_c_to_subvolume(k);
+ if (bch2_snapshot_is_ancestor(trans->c, le32_to_cpu(s.v->snapshot), snapshot)) {
+ bch2_trans_iter_exit(trans, &iter);
+ *subvolid = k.k->p.offset;
+ goto found;
+ }
+ }
+ if (!ret)
+ ret = -ENOENT;
+found:
+ bch2_trans_iter_exit(trans, &iter);
+ return ret;
+}
+
+static int check_dirent_to_subvol(struct btree_trans *trans, struct btree_iter *iter,
+ struct bkey_s_c_dirent d)
+{
+ struct bch_fs *c = trans->c;
+ struct btree_iter subvol_iter = {};
+ struct bch_inode_unpacked subvol_root;
+ u32 parent_subvol = le32_to_cpu(d.v->d_parent_subvol);
+ u32 target_subvol = le32_to_cpu(d.v->d_child_subvol);
+ u32 parent_snapshot;
+ u64 parent_inum;
+ struct printbuf buf = PRINTBUF;
+ int ret = 0;
+
+ ret = subvol_lookup(trans, parent_subvol, &parent_snapshot, &parent_inum);
+ if (ret && !bch2_err_matches(ret, ENOENT))
+ return ret;
+
+ if (fsck_err_on(ret, c, dirent_to_missing_parent_subvol,
+ "dirent parent_subvol points to missing subvolume\n%s",
+ (bch2_bkey_val_to_text(&buf, c, d.s_c), buf.buf)) ||
+ fsck_err_on(!ret && !bch2_snapshot_is_ancestor(c, parent_snapshot, d.k->p.snapshot),
+ c, dirent_not_visible_in_parent_subvol,
+ "dirent not visible in parent_subvol (not an ancestor of subvol snap %u)\n%s",
+ parent_snapshot,
+ (bch2_bkey_val_to_text(&buf, c, d.s_c), buf.buf))) {
+ u32 new_parent_subvol;
+ ret = find_snapshot_subvol(trans, d.k->p.snapshot, &new_parent_subvol);
if (ret)
goto err;
- bkey_reassemble(&n->k_i, d.s_c);
- n->v.d_parent_subvol = cpu_to_le32(target->bi_parent_subvol);
+ struct bkey_i_dirent *new_dirent = bch2_bkey_make_mut_typed(trans, iter, &d.s_c, 0, dirent);
+ ret = PTR_ERR_OR_ZERO(new_dirent);
+ if (ret)
+ goto err;
- ret = bch2_trans_update(trans, iter, &n->k_i, 0);
+ new_dirent->v.d_parent_subvol = cpu_to_le32(new_parent_subvol);
+ }
+
+ struct bkey_s_c_subvolume s =
+ bch2_bkey_get_iter_typed(trans, &subvol_iter,
+ BTREE_ID_subvolumes, POS(0, target_subvol),
+ 0, subvolume);
+ ret = bkey_err(s.s_c);
+ if (ret && !bch2_err_matches(ret, ENOENT))
+ return ret;
+
+ if (ret) {
+ if (fsck_err(c, dirent_to_missing_subvol,
+ "dirent points to missing subvolume\n%s",
+ (bch2_bkey_val_to_text(&buf, c, d.s_c), buf.buf)))
+ return __remove_dirent(trans, d.k->p);
+ ret = 0;
+ goto out;
+ }
+
+ if (fsck_err_on(le32_to_cpu(s.v->fs_path_parent) != parent_subvol,
+ c, subvol_fs_path_parent_wrong,
+ "subvol with wrong fs_path_parent, should be be %u\n%s",
+ parent_subvol,
+ (bch2_bkey_val_to_text(&buf, c, s.s_c), buf.buf))) {
+ struct bkey_i_subvolume *n =
+ bch2_bkey_make_mut_typed(trans, &subvol_iter, &s.s_c, 0, subvolume);
+ ret = PTR_ERR_OR_ZERO(n);
if (ret)
goto err;
- d = dirent_i_to_s_c(n);
+ n->v.fs_path_parent = le32_to_cpu(parent_subvol);
}
+
+ u64 target_inum = le64_to_cpu(s.v->inode);
+ u32 target_snapshot = le32_to_cpu(s.v->snapshot);
+
+ ret = lookup_inode(trans, target_inum, &subvol_root, &target_snapshot);
+ if (ret && !bch2_err_matches(ret, ENOENT))
+ return ret;
+
+ if (fsck_err_on(parent_subvol != subvol_root.bi_parent_subvol,
+ c, inode_bi_parent_wrong,
+ "subvol root %llu has wrong bi_parent_subvol: got %u, should be %u",
+ target_inum,
+ subvol_root.bi_parent_subvol, parent_subvol)) {
+ subvol_root.bi_parent_subvol = parent_subvol;
+ ret = __bch2_fsck_write_inode(trans, &subvol_root, target_snapshot);
+ if (ret)
+ return ret;
+ }
+
+ ret = check_dirent_target(trans, iter, d, &subvol_root,
+ target_snapshot);
+ if (ret)
+ return ret;
out:
err:
fsck_err:
- bch2_trans_iter_exit(trans, &bp_iter);
+ bch2_trans_iter_exit(trans, &subvol_iter);
printbuf_exit(&buf);
- bch_err_fn(c, ret);
return ret;
}
BUG_ON(!btree_iter_path(trans, iter)->should_be_locked);
- i = walk_inode(trans, dir, equiv, k.k->type == KEY_TYPE_whiteout);
+ i = walk_inode(trans, dir, k);
ret = PTR_ERR_OR_ZERO(i);
if (ret < 0)
goto err;
d = bkey_s_c_to_dirent(k);
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;
-
- ret = __subvol_lookup(trans, target_subvol,
- &target_snapshot, &target_inum);
- if (ret && !bch2_err_matches(ret, ENOENT))
- goto err;
-
- if (fsck_err_on(ret, c, dirent_to_missing_subvol,
- "dirent points to missing subvolume %u",
- le32_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 && !bch2_err_matches(ret, ENOENT))
- goto err;
-
- if (fsck_err_on(ret, c, subvol_to_missing_root,
- "subvolume %u points to missing subvolume root %llu",
- target_subvol,
- target_inum)) {
- bch_err(c, "repair not implemented yet");
- ret = -EINVAL;
- goto err;
- }
-
- if (fsck_err_on(subvol_root.bi_subvol != target_subvol,
- c, subvol_root_wrong_bi_subvol,
- "subvol root %llu has wrong bi_subvol field: got %u, should be %u",
- target_inum,
- subvol_root.bi_subvol, target_subvol)) {
- subvol_root.bi_subvol = target_subvol;
- ret = __write_inode(trans, &subvol_root, target_snapshot);
- if (ret)
- goto err;
- }
-
- ret = check_dirent_target(trans, iter, d, &subvol_root,
- target_snapshot);
+ ret = check_dirent_to_subvol(trans, iter, d);
if (ret)
goto err;
} else {
if (ret)
goto err;
}
- }
-
- if (d.v->d_type == DT_DIR)
- for_each_visible_inode(c, s, dir, equiv.snapshot, i)
- i->count++;
+ if (d.v->d_type == DT_DIR)
+ for_each_visible_inode(c, s, dir, equiv.snapshot, i)
+ i->count++;
+ }
out:
err:
fsck_err:
if (ret)
return ret;
- i = walk_inode(trans, inode, k.k->p, k.k->type == KEY_TYPE_whiteout);
+ i = walk_inode(trans, inode, k);
ret = PTR_ERR_OR_ZERO(i);
if (ret)
return ret;
u64 inum;
int ret;
- ret = __subvol_lookup(trans, BCACHEFS_ROOT_SUBVOL, &snapshot, &inum);
+ ret = subvol_lookup(trans, BCACHEFS_ROOT_SUBVOL, &snapshot, &inum);
if (ret && !bch2_err_matches(ret, ENOENT))
return 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 && !bch2_err_matches(ret, ENOENT))
return ret;
0, NULL);
root_inode.bi_inum = inum;
- ret = __write_inode(trans, &root_inode, snapshot);
+ ret = __bch2_fsck_write_inode(trans, &root_inode, snapshot);
bch_err_msg(c, ret, "writing root inode");
}
err:
*
* XXX: we should also be verifying that inodes are in the right subvolumes
*/
-static int check_path(struct btree_trans *trans,
- pathbuf *p,
- struct bch_inode_unpacked *inode,
- u32 snapshot)
+static int check_path(struct btree_trans *trans, pathbuf *p, struct bkey_s_c inode_k)
{
struct bch_fs *c = trans->c;
+ struct btree_iter inode_iter = {};
+ struct bch_inode_unpacked inode;
+ struct printbuf buf = PRINTBUF;
+ u32 snapshot = bch2_snapshot_equiv(c, inode_k.k->p.snapshot);
int ret = 0;
- snapshot = bch2_snapshot_equiv(c, snapshot);
p->nr = 0;
- while (!(inode->bi_inum == BCACHEFS_ROOT_INO &&
- inode->bi_subvol == BCACHEFS_ROOT_SUBVOL)) {
+ BUG_ON(bch2_inode_unpack(inode_k, &inode));
+
+ while (!(inode.bi_inum == BCACHEFS_ROOT_INO &&
+ inode.bi_subvol == BCACHEFS_ROOT_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,
- &parent_snapshot, &inum);
- if (ret)
- break;
- }
-
- ret = lockrestart_do(trans,
- PTR_ERR_OR_ZERO((d = dirent_get_by_pos(trans, &dirent_iter,
- SPOS(inode->bi_dir, inode->bi_dir_offset,
- parent_snapshot))).k));
+ d = inode_get_dirent(trans, &dirent_iter, &inode, &parent_snapshot);
+ ret = bkey_err(d.s_c);
if (ret && !bch2_err_matches(ret, ENOENT))
break;
- if (!ret && !dirent_points_to_inode(d, inode)) {
+ if (!ret && !dirent_points_to_inode(d, &inode)) {
bch2_trans_iter_exit(trans, &dirent_iter);
ret = -BCH_ERR_ENOENT_dirent_doesnt_match_inode;
}
if (bch2_err_matches(ret, ENOENT)) {
- if (fsck_err(c, inode_unreachable,
- "unreachable inode %llu:%u, type %s nlink %u backptr %llu:%llu",
- inode->bi_inum, snapshot,
- 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;
+ if (fsck_err(c, inode_unreachable,
+ "unreachable inode\n%s",
+ (printbuf_reset(&buf),
+ bch2_bkey_val_to_text(&buf, c, inode_k),
+ buf.buf)))
+ ret = reattach_inode(trans, &inode, snapshot);
+ goto out;
}
bch2_trans_iter_exit(trans, &dirent_iter);
- if (!S_ISDIR(inode->bi_mode))
+ if (!S_ISDIR(inode.bi_mode))
break;
- ret = path_down(c, p, inode->bi_inum, snapshot);
+ ret = path_down(c, p, inode.bi_inum, snapshot);
if (ret) {
bch_err(c, "memory allocation failure");
return ret;
snapshot = parent_snapshot;
- ret = lookup_inode(trans, inode->bi_dir, inode, &snapshot);
+ bch2_trans_iter_exit(trans, &inode_iter);
+ inode_k = bch2_bkey_get_iter(trans, &inode_iter, BTREE_ID_inodes,
+ SPOS(0, inode.bi_dir, snapshot), 0);
+ ret = bkey_err(inode_k) ?:
+ !bkey_is_inode(inode_k.k) ? -BCH_ERR_ENOENT_inode
+ : bch2_inode_unpack(inode_k, &inode);
if (ret) {
/* Should have been caught in dirents pass */
- bch_err(c, "error looking up parent directory: %i", ret);
+ if (!bch2_err_matches(ret, BCH_ERR_transaction_restart))
+ bch_err(c, "error looking up parent directory: %i", ret);
break;
}
- if (path_is_dup(p, inode->bi_inum, snapshot)) {
+ snapshot = inode_k.k->p.snapshot;
+
+ if (path_is_dup(p, inode.bi_inum, snapshot)) {
/* 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);
+ pr_err("%llu:%u", inode.bi_inum, snapshot);
- if (!fsck_err(c, dir_loop,
- "directory structure loop"))
+ if (!fsck_err(c, dir_loop, "directory structure loop"))
return 0;
- ret = commit_do(trans, NULL, NULL,
- BCH_TRANS_COMMIT_no_enospc,
- remove_backpointer(trans, inode));
- if (ret) {
- bch_err(c, "error removing dirent: %i", ret);
+ ret = remove_backpointer(trans, &inode);
+ if (ret && !bch2_err_matches(ret, BCH_ERR_transaction_restart))
+ bch_err_msg(c, ret, "removing dirent");
+ if (ret)
break;
- }
- ret = reattach_inode(trans, inode, snapshot);
+ ret = reattach_inode(trans, &inode, snapshot);
+ if (ret && !bch2_err_matches(ret, BCH_ERR_transaction_restart))
+ bch_err_msg(c, ret, "reattaching inode %llu", inode.bi_inum);
+ break;
}
}
+out:
fsck_err:
+ bch2_trans_iter_exit(trans, &inode_iter);
+ printbuf_exit(&buf);
bch_err_fn(c, ret);
return ret;
}
*/
int bch2_check_directory_structure(struct bch_fs *c)
{
- struct btree_trans *trans = bch2_trans_get(c);
- struct btree_iter iter;
- struct bkey_s_c k;
- struct bch_inode_unpacked u;
pathbuf path = { 0, };
int ret;
- for_each_btree_key_old(trans, iter, BTREE_ID_inodes, POS_MIN,
- BTREE_ITER_INTENT|
- BTREE_ITER_PREFETCH|
- BTREE_ITER_ALL_SNAPSHOTS, k, ret) {
- if (!bkey_is_inode(k.k))
- continue;
-
- BUG_ON(bch2_inode_unpack(k, &u));
+ ret = bch2_trans_run(c,
+ for_each_btree_key_commit(trans, iter, BTREE_ID_inodes, POS_MIN,
+ BTREE_ITER_INTENT|
+ BTREE_ITER_PREFETCH|
+ BTREE_ITER_ALL_SNAPSHOTS, k,
+ NULL, NULL, BCH_TRANS_COMMIT_no_enospc, ({
+ if (!bkey_is_inode(k.k))
+ continue;
- if (u.bi_flags & BCH_INODE_unlinked)
- continue;
+ if (bch2_inode_flags(k) & BCH_INODE_unlinked)
+ continue;
- ret = check_path(trans, &path, &u, iter.pos.snapshot);
- if (ret)
- break;
- }
- bch2_trans_iter_exit(trans, &iter);
- bch2_trans_put(trans);
+ check_path(trans, &path, k);
+ })));
darray_exit(&path);
bch_err_fn(c, ret);
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);
+ ret = __bch2_fsck_write_inode(trans, &u, k.k->p.snapshot);
}
fsck_err:
return ret;
projects / bcachefs-tools-debian / blobdiff