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bcachefs: bch2_run_explicit_recovery_pass()

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This introduces bch2_run_explicit_recovery_pass() and uses it for when
fsck detects that we need to re-run dead snaphots cleanup, and makes
dead snapshot cleanup more like a normal recovery pass.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2023-07-16 23:21:17 -04:00
parent ef1634f0f1
commit ae2e13d780
5 changed files with 22 additions and 12 deletions
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15
fs/bcachefs/bcachefs.h
View File

@ -680,7 +680,7 @@ enum bch_write_ref {
x(check_snapshot_trees, PASS_FSCK) \
x(check_snapshots, PASS_FSCK) \
x(check_subvols, PASS_FSCK) \
x(delete_dead_snapshots, PASS_FSCK|PASS_UNCLEAN|PASS_SILENT) \
x(delete_dead_snapshots, PASS_FSCK|PASS_UNCLEAN) \
x(fs_upgrade_for_subvolumes, 0) \
x(check_inodes, PASS_FSCK|PASS_UNCLEAN) \
x(check_extents, PASS_FSCK) \
@ -1179,6 +1179,19 @@ static inline bool bch2_dev_exists2(const struct bch_fs *c, unsigned dev)
return dev < c->sb.nr_devices && c->devs[dev];
}
/*
* For when we need to rewind recovery passes and run a pass we skipped:
*/
static inline int bch2_run_explicit_recovery_pass(struct bch_fs *c,
enum bch_recovery_pass pass)
{
BUG_ON(c->curr_recovery_pass < pass);
c->recovery_passes_explicit |= BIT_ULL(pass);
c->curr_recovery_pass = pass;
return -BCH_ERR_restart_recovery;
}
#define BKEY_PADDED_ONSTACK(key, pad) \
struct { struct bkey_i key; __u64 key ## _pad[pad]; }

2
fs/bcachefs/errcode.h
View File

@ -157,7 +157,7 @@
x(BCH_ERR_fsck, fsck_errors_not_fixed) \
x(BCH_ERR_fsck, fsck_repair_unimplemented) \
x(BCH_ERR_fsck, fsck_repair_impossible) \
x(0, need_snapshot_cleanup) \
x(0, restart_recovery) \
x(0, need_topology_repair) \
x(0, unwritten_extent_update) \
x(EINVAL, device_state_not_allowed) \

2
fs/bcachefs/fsck.c
View File

@ -500,7 +500,7 @@ static int snapshots_seen_update(struct bch_fs *c, struct snapshots_seen *s,
bch2_btree_ids[btree_id],
pos.inode, pos.offset,
i->id, n.id, n.equiv);
return -BCH_ERR_need_snapshot_cleanup;
return bch2_run_explicit_recovery_pass(c, BCH_RECOVERY_PASS_delete_dead_snapshots);
}
}

5
fs/bcachefs/recovery.c
View File

@ -1270,11 +1270,8 @@ again:
c->curr_recovery_pass++;
}
if (bch2_err_matches(ret, BCH_ERR_need_snapshot_cleanup)) {
set_bit(BCH_FS_HAVE_DELETED_SNAPSHOTS, &c->flags);
c->curr_recovery_pass = BCH_RECOVERY_PASS_delete_dead_snapshots;
if (bch2_err_matches(ret, BCH_ERR_restart_recovery))
goto again;
}
return ret;
}

10
fs/bcachefs/subvolume.c
View File

@ -331,8 +331,10 @@ int bch2_mark_snapshot(struct btree_trans *trans,
parent - id - 1 < IS_ANCESTOR_BITMAP)
__set_bit(parent - id - 1, t->is_ancestor);
if (BCH_SNAPSHOT_DELETED(s.v))
if (BCH_SNAPSHOT_DELETED(s.v)) {
set_bit(BCH_FS_HAVE_DELETED_SNAPSHOTS, &c->flags);
c->recovery_passes_explicit |= BIT_ULL(BCH_RECOVERY_PASS_delete_dead_snapshots);
}
} else {
memset(t, 0, sizeof(*t));
}
@ -1302,9 +1304,6 @@ int bch2_delete_dead_snapshots(struct bch_fs *c)
u32 i, id;
int ret = 0;
if (!test_bit(BCH_FS_HAVE_DELETED_SNAPSHOTS, &c->flags))
return 0;
if (!test_bit(BCH_FS_STARTED, &c->flags)) {
ret = bch2_fs_read_write_early(c);
if (ret) {
@ -1399,7 +1398,8 @@ static void bch2_delete_dead_snapshots_work(struct work_struct *work)
{
struct bch_fs *c = container_of(work, struct bch_fs, snapshot_delete_work);
bch2_delete_dead_snapshots(c);
if (test_bit(BCH_FS_HAVE_DELETED_SNAPSHOTS, &c->flags))
bch2_delete_dead_snapshots(c);
bch2_write_ref_put(c, BCH_WRITE_REF_delete_dead_snapshots);
}