+// SPDX-License-Identifier: GPL-2.0
/*
* bcachefs setup/teardown code, and some metadata io - read a superblock and
* figure out what to do with it.
*/
#include "bcachefs.h"
-#include "alloc.h"
+#include "alloc_background.h"
+#include "alloc_foreground.h"
+#include "bkey_sort.h"
#include "btree_cache.h"
#include "btree_gc.h"
-#include "btree_update.h"
+#include "btree_journal_iter.h"
+#include "btree_key_cache.h"
#include "btree_update_interior.h"
#include "btree_io.h"
+#include "btree_write_buffer.h"
+#include "buckets_waiting_for_journal.h"
#include "chardev.h"
#include "checksum.h"
#include "clock.h"
#include "compress.h"
+#include "counters.h"
#include "debug.h"
#include "disk_groups.h"
+#include "ec.h"
+#include "errcode.h"
#include "error.h"
#include "fs.h"
#include "fs-io.h"
+#include "fs-io-buffered.h"
+#include "fs-io-direct.h"
#include "fsck.h"
#include "inode.h"
-#include "io.h"
+#include "io_read.h"
+#include "io_write.h"
#include "journal.h"
-#include "journal_io.h"
#include "journal_reclaim.h"
-#include "keylist.h"
+#include "journal_seq_blacklist.h"
#include "move.h"
#include "migrate.h"
#include "movinggc.h"
+#include "nocow_locking.h"
#include "quota.h"
#include "rebalance.h"
+#include "recovery.h"
#include "replicas.h"
+#include "sb-clean.h"
+#include "sb-members.h"
+#include "snapshot.h"
+#include "subvolume.h"
#include "super.h"
#include "super-io.h"
#include "sysfs.h"
+#include "trace.h"
#include <linux/backing-dev.h>
#include <linux/blkdev.h>
#include <linux/debugfs.h>
#include <linux/device.h>
-#include <linux/genhd.h>
#include <linux/idr.h>
-#include <linux/kthread.h>
#include <linux/module.h>
#include <linux/percpu.h>
#include <linux/random.h>
#include <linux/sysfs.h>
#include <crypto/hash.h>
-#include <trace/events/bcachefs.h>
-
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Kent Overstreet <kent.overstreet@gmail.com>");
+MODULE_DESCRIPTION("bcachefs filesystem");
#define KTYPE(type) \
-struct kobj_type type ## _ktype = { \
+static const struct attribute_group type ## _group = { \
+ .attrs = type ## _files \
+}; \
+ \
+static const struct attribute_group *type ## _groups[] = { \
+ &type ## _group, \
+ NULL \
+}; \
+ \
+static const struct kobj_type type ## _ktype = { \
.release = type ## _release, \
.sysfs_ops = &type ## _sysfs_ops, \
- .default_attrs = type ## _files \
+ .default_groups = type ## _groups \
}
static void bch2_fs_release(struct kobject *);
static void bch2_dev_release(struct kobject *);
+static void bch2_fs_counters_release(struct kobject *k)
+{
+}
static void bch2_fs_internal_release(struct kobject *k)
{
{
}
-static KTYPE(bch2_fs);
-static KTYPE(bch2_fs_internal);
-static KTYPE(bch2_fs_opts_dir);
-static KTYPE(bch2_fs_time_stats);
-static KTYPE(bch2_dev);
+KTYPE(bch2_fs);
+KTYPE(bch2_fs_counters);
+KTYPE(bch2_fs_internal);
+KTYPE(bch2_fs_opts_dir);
+KTYPE(bch2_fs_time_stats);
+KTYPE(bch2_dev);
static struct kset *bcachefs_kset;
static LIST_HEAD(bch_fs_list);
static DEFINE_MUTEX(bch_fs_list_lock);
-static DECLARE_WAIT_QUEUE_HEAD(bch_read_only_wait);
+DECLARE_WAIT_QUEUE_HEAD(bch2_read_only_wait);
static void bch2_dev_free(struct bch_dev *);
static int bch2_dev_alloc(struct bch_fs *, unsigned);
static int bch2_dev_sysfs_online(struct bch_fs *, struct bch_dev *);
static void __bch2_dev_read_only(struct bch_fs *, struct bch_dev *);
-struct bch_fs *bch2_bdev_to_fs(struct block_device *bdev)
+struct bch_fs *bch2_dev_to_fs(dev_t dev)
{
struct bch_fs *c;
struct bch_dev *ca;
list_for_each_entry(c, &bch_fs_list, list)
for_each_member_device_rcu(ca, c, i, NULL)
- if (ca->disk_sb.bdev == bdev) {
+ if (ca->disk_sb.bdev && ca->disk_sb.bdev->bd_dev == dev) {
closure_get(&c->cl);
goto found;
}
return c;
}
-static struct bch_fs *__bch2_uuid_to_fs(uuid_le uuid)
+static struct bch_fs *__bch2_uuid_to_fs(__uuid_t uuid)
{
struct bch_fs *c;
lockdep_assert_held(&bch_fs_list_lock);
list_for_each_entry(c, &bch_fs_list, list)
- if (!memcmp(&c->disk_sb.sb->uuid, &uuid, sizeof(uuid_le)))
+ if (!memcmp(&c->disk_sb.sb->uuid, &uuid, sizeof(uuid)))
return c;
return NULL;
}
-struct bch_fs *bch2_uuid_to_fs(uuid_le uuid)
+struct bch_fs *bch2_uuid_to_fs(__uuid_t uuid)
{
struct bch_fs *c;
return c;
}
-int bch2_congested(void *data, int bdi_bits)
+static void bch2_dev_usage_journal_reserve(struct bch_fs *c)
{
- struct bch_fs *c = data;
- struct backing_dev_info *bdi;
struct bch_dev *ca;
- unsigned i;
- int ret = 0;
+ unsigned i, nr = 0, u64s =
+ ((sizeof(struct jset_entry_dev_usage) +
+ sizeof(struct jset_entry_dev_usage_type) * BCH_DATA_NR)) /
+ sizeof(u64);
rcu_read_lock();
- if (bdi_bits & (1 << WB_sync_congested)) {
- /* Reads - check all devices: */
- for_each_readable_member(ca, c, i) {
- bdi = ca->disk_sb.bdev->bd_bdi;
-
- if (bdi_congested(bdi, bdi_bits)) {
- ret = 1;
- break;
- }
- }
- } else {
- unsigned target = READ_ONCE(c->opts.foreground_target);
- const struct bch_devs_mask *devs = target
- ? bch2_target_to_mask(c, target)
- : &c->rw_devs[BCH_DATA_USER];
-
- for_each_member_device_rcu(ca, c, i, devs) {
- bdi = ca->disk_sb.bdev->bd_bdi;
-
- if (bdi_congested(bdi, bdi_bits)) {
- ret = 1;
- break;
- }
- }
- }
+ for_each_member_device_rcu(ca, c, i, NULL)
+ nr++;
rcu_read_unlock();
- return ret;
+ bch2_journal_entry_res_resize(&c->journal,
+ &c->dev_usage_journal_res, u64s * nr);
}
/* Filesystem RO/RW: */
* - allocator depends on the journal (when it rewrites prios and gens)
*/
-static void bch_fs_mark_clean(struct bch_fs *c)
-{
- if (!bch2_journal_error(&c->journal) &&
- !test_bit(BCH_FS_ERROR, &c->flags) &&
- !test_bit(BCH_FS_EMERGENCY_RO, &c->flags)) {
- mutex_lock(&c->sb_lock);
- SET_BCH_SB_CLEAN(c->disk_sb.sb, true);
- bch2_write_super(c);
- mutex_unlock(&c->sb_lock);
- }
-}
-
static void __bch2_fs_read_only(struct bch_fs *c)
{
struct bch_dev *ca;
- unsigned i;
+ unsigned i, clean_passes = 0;
+ u64 seq = 0;
+ bch2_fs_ec_stop(c);
+ bch2_open_buckets_stop(c, NULL, true);
bch2_rebalance_stop(c);
-
- for_each_member_device(ca, c, i)
- bch2_copygc_stop(ca);
-
+ bch2_copygc_stop(c);
bch2_gc_thread_stop(c);
+ bch2_fs_ec_flush(c);
- /*
- * Flush journal before stopping allocators, because flushing journal
- * blacklist entries involves allocating new btree nodes:
- */
- bch2_journal_flush_pins(&c->journal, U64_MAX - 1);
-
- for_each_member_device(ca, c, i)
- bch2_dev_allocator_stop(ca);
+ bch_verbose(c, "flushing journal and stopping allocators, journal seq %llu",
+ journal_cur_seq(&c->journal));
- bch2_journal_flush_all_pins(&c->journal);
+ do {
+ clean_passes++;
- /*
- * We need to explicitly wait on btree interior updates to complete
- * before stopping the journal, flushing all journal pins isn't
- * sufficient, because in the BTREE_INTERIOR_UPDATING_ROOT case btree
- * interior updates have to drop their journal pin before they're
- * fully complete:
- */
- closure_wait_event(&c->btree_interior_update_wait,
- !bch2_btree_interior_updates_nr_pending(c));
+ if (bch2_btree_interior_updates_flush(c) ||
+ bch2_journal_flush_all_pins(&c->journal) ||
+ bch2_btree_flush_all_writes(c) ||
+ seq != atomic64_read(&c->journal.seq)) {
+ seq = atomic64_read(&c->journal.seq);
+ clean_passes = 0;
+ }
+ } while (clean_passes < 2);
- if (!test_bit(BCH_FS_EMERGENCY_RO, &c->flags))
- bch2_btree_verify_flushed(c);
+ bch_verbose(c, "flushing journal and stopping allocators complete, journal seq %llu",
+ journal_cur_seq(&c->journal));
+ if (test_bit(JOURNAL_REPLAY_DONE, &c->journal.flags) &&
+ !test_bit(BCH_FS_EMERGENCY_RO, &c->flags))
+ set_bit(BCH_FS_CLEAN_SHUTDOWN, &c->flags);
bch2_fs_journal_stop(&c->journal);
- /*
- * the journal kicks off btree writes via reclaim - wait for in flight
- * writes after stopping journal:
- */
- if (test_bit(BCH_FS_EMERGENCY_RO, &c->flags))
- bch2_btree_flush_all_writes(c);
-
/*
* After stopping journal:
*/
bch2_dev_allocator_remove(c, ca);
}
+#ifndef BCH_WRITE_REF_DEBUG
static void bch2_writes_disabled(struct percpu_ref *writes)
{
struct bch_fs *c = container_of(writes, struct bch_fs, writes);
set_bit(BCH_FS_WRITE_DISABLE_COMPLETE, &c->flags);
- wake_up(&bch_read_only_wait);
+ wake_up(&bch2_read_only_wait);
}
+#endif
void bch2_fs_read_only(struct bch_fs *c)
{
- if (c->state != BCH_FS_STARTING &&
- c->state != BCH_FS_RW)
+ if (!test_bit(BCH_FS_RW, &c->flags)) {
+ bch2_journal_reclaim_stop(&c->journal);
return;
+ }
- if (test_bit(BCH_FS_ERROR, &c->flags))
- return;
+ BUG_ON(test_bit(BCH_FS_WRITE_DISABLE_COMPLETE, &c->flags));
/*
* Block new foreground-end write operations from starting - any new
* writes will return -EROFS:
- *
- * (This is really blocking new _allocations_, writes to previously
- * allocated space can still happen until stopping the allocator in
- * bch2_dev_allocator_stop()).
*/
+ set_bit(BCH_FS_GOING_RO, &c->flags);
+#ifndef BCH_WRITE_REF_DEBUG
percpu_ref_kill(&c->writes);
-
- cancel_delayed_work(&c->pd_controllers_update);
+#else
+ for (unsigned i = 0; i < BCH_WRITE_REF_NR; i++)
+ bch2_write_ref_put(c, i);
+#endif
/*
* If we're not doing an emergency shutdown, we want to wait on
* we do need to wait on them before returning and signalling
* that going RO is complete:
*/
- wait_event(bch_read_only_wait,
+ wait_event(bch2_read_only_wait,
test_bit(BCH_FS_WRITE_DISABLE_COMPLETE, &c->flags) ||
test_bit(BCH_FS_EMERGENCY_RO, &c->flags));
__bch2_fs_read_only(c);
- bch_fs_mark_clean(c);
-
- wait_event(bch_read_only_wait,
+ wait_event(bch2_read_only_wait,
test_bit(BCH_FS_WRITE_DISABLE_COMPLETE, &c->flags));
clear_bit(BCH_FS_WRITE_DISABLE_COMPLETE, &c->flags);
- c->state = BCH_FS_RO;
+ clear_bit(BCH_FS_GOING_RO, &c->flags);
+
+ if (!bch2_journal_error(&c->journal) &&
+ !test_bit(BCH_FS_ERROR, &c->flags) &&
+ !test_bit(BCH_FS_EMERGENCY_RO, &c->flags) &&
+ test_bit(BCH_FS_STARTED, &c->flags) &&
+ test_bit(BCH_FS_CLEAN_SHUTDOWN, &c->flags) &&
+ !c->opts.norecovery) {
+ BUG_ON(c->journal.last_empty_seq != journal_cur_seq(&c->journal));
+ BUG_ON(atomic_read(&c->btree_cache.dirty));
+ BUG_ON(atomic_long_read(&c->btree_key_cache.nr_dirty));
+ BUG_ON(c->btree_write_buffer.state.nr);
+
+ bch_verbose(c, "marking filesystem clean");
+ bch2_fs_mark_clean(c);
+ }
+
+ clear_bit(BCH_FS_RW, &c->flags);
}
static void bch2_fs_read_only_work(struct work_struct *work)
struct bch_fs *c =
container_of(work, struct bch_fs, read_only_work);
- mutex_lock(&c->state_lock);
+ down_write(&c->state_lock);
bch2_fs_read_only(c);
- mutex_unlock(&c->state_lock);
+ up_write(&c->state_lock);
}
static void bch2_fs_read_only_async(struct bch_fs *c)
{
bool ret = !test_and_set_bit(BCH_FS_EMERGENCY_RO, &c->flags);
- bch2_fs_read_only_async(c);
bch2_journal_halt(&c->journal);
+ bch2_fs_read_only_async(c);
- wake_up(&bch_read_only_wait);
+ wake_up(&bch2_read_only_wait);
return ret;
}
-const char *bch2_fs_read_write(struct bch_fs *c)
+static int bch2_fs_read_write_late(struct bch_fs *c)
+{
+ int ret;
+
+ /*
+ * Data move operations can't run until after check_snapshots has
+ * completed, and bch2_snapshot_is_ancestor() is available.
+ *
+ * Ideally we'd start copygc/rebalance earlier instead of waiting for
+ * all of recovery/fsck to complete:
+ */
+ ret = bch2_copygc_start(c);
+ if (ret) {
+ bch_err(c, "error starting copygc thread");
+ return ret;
+ }
+
+ ret = bch2_rebalance_start(c);
+ if (ret) {
+ bch_err(c, "error starting rebalance thread");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int __bch2_fs_read_write(struct bch_fs *c, bool early)
{
struct bch_dev *ca;
- const char *err = NULL;
unsigned i;
+ int ret;
- if (c->state != BCH_FS_STARTING &&
- c->state != BCH_FS_RO)
- return NULL;
+ if (test_bit(BCH_FS_INITIAL_GC_UNFIXED, &c->flags)) {
+ bch_err(c, "cannot go rw, unfixed btree errors");
+ return -BCH_ERR_erofs_unfixed_errors;
+ }
+
+ if (test_bit(BCH_FS_RW, &c->flags))
+ return 0;
+
+ if (c->opts.norecovery)
+ return -BCH_ERR_erofs_norecovery;
+
+ /*
+ * nochanges is used for fsck -n mode - we have to allow going rw
+ * during recovery for that to work:
+ */
+ if (c->opts.nochanges && (!early || c->opts.read_only))
+ return -BCH_ERR_erofs_nochanges;
+
+ bch_info(c, "going read-write");
+
+ ret = bch2_members_v2_init(c);
+ if (ret)
+ goto err;
+
+ ret = bch2_fs_mark_dirty(c);
+ if (ret)
+ goto err;
+
+ clear_bit(BCH_FS_CLEAN_SHUTDOWN, &c->flags);
+
+ /*
+ * First journal write must be a flush write: after a clean shutdown we
+ * don't read the journal, so the first journal write may end up
+ * overwriting whatever was there previously, and there must always be
+ * at least one non-flush write in the journal or recovery will fail:
+ */
+ set_bit(JOURNAL_NEED_FLUSH_WRITE, &c->journal.flags);
for_each_rw_member(ca, c, i)
bch2_dev_allocator_add(c, ca);
bch2_recalc_capacity(c);
- err = "error starting allocator thread";
- for_each_rw_member(ca, c, i)
- if (bch2_dev_allocator_start(ca)) {
- percpu_ref_put(&ca->io_ref);
- goto err;
- }
+ ret = bch2_gc_thread_start(c);
+ if (ret) {
+ bch_err(c, "error starting gc thread");
+ return ret;
+ }
- err = "error starting btree GC thread";
- if (bch2_gc_thread_start(c))
+ ret = bch2_journal_reclaim_start(&c->journal);
+ if (ret)
goto err;
- err = "error starting copygc thread";
- for_each_rw_member(ca, c, i)
- if (bch2_copygc_start(c, ca)) {
- percpu_ref_put(&ca->io_ref);
+ if (!early) {
+ ret = bch2_fs_read_write_late(c);
+ if (ret)
goto err;
- }
+ }
- err = "error starting rebalance thread";
- if (bch2_rebalance_start(c))
- goto err;
+#ifndef BCH_WRITE_REF_DEBUG
+ percpu_ref_reinit(&c->writes);
+#else
+ for (i = 0; i < BCH_WRITE_REF_NR; i++) {
+ BUG_ON(atomic_long_read(&c->writes[i]));
+ atomic_long_inc(&c->writes[i]);
+ }
+#endif
+ set_bit(BCH_FS_RW, &c->flags);
+ set_bit(BCH_FS_WAS_RW, &c->flags);
+
+ bch2_do_discards(c);
+ bch2_do_invalidates(c);
+ bch2_do_stripe_deletes(c);
+ bch2_do_pending_node_rewrites(c);
+ return 0;
+err:
+ __bch2_fs_read_only(c);
+ return ret;
+}
- schedule_delayed_work(&c->pd_controllers_update, 5 * HZ);
+int bch2_fs_read_write(struct bch_fs *c)
+{
+ return __bch2_fs_read_write(c, false);
+}
- if (c->state != BCH_FS_STARTING)
- percpu_ref_reinit(&c->writes);
+int bch2_fs_read_write_early(struct bch_fs *c)
+{
+ lockdep_assert_held(&c->state_lock);
- c->state = BCH_FS_RW;
- return NULL;
-err:
- __bch2_fs_read_only(c);
- return err;
+ return __bch2_fs_read_write(c, true);
}
/* Filesystem startup/shutdown: */
-static void bch2_fs_free(struct bch_fs *c)
+static void __bch2_fs_free(struct bch_fs *c)
{
unsigned i;
for (i = 0; i < BCH_TIME_STAT_NR; i++)
bch2_time_stats_exit(&c->times[i]);
+ bch2_free_pending_node_rewrites(c);
+ bch2_fs_counters_exit(c);
+ bch2_fs_snapshots_exit(c);
bch2_fs_quota_exit(c);
+ bch2_fs_fs_io_direct_exit(c);
+ bch2_fs_fs_io_buffered_exit(c);
bch2_fs_fsio_exit(c);
+ bch2_fs_ec_exit(c);
bch2_fs_encryption_exit(c);
- bch2_fs_io_exit(c);
+ bch2_fs_nocow_locking_exit(c);
+ bch2_fs_io_write_exit(c);
+ bch2_fs_io_read_exit(c);
+ bch2_fs_buckets_waiting_for_journal_exit(c);
+ bch2_fs_btree_interior_update_exit(c);
+ bch2_fs_btree_iter_exit(c);
+ bch2_fs_btree_key_cache_exit(&c->btree_key_cache);
bch2_fs_btree_cache_exit(c);
+ bch2_fs_replicas_exit(c);
bch2_fs_journal_exit(&c->journal);
bch2_io_clock_exit(&c->io_clock[WRITE]);
bch2_io_clock_exit(&c->io_clock[READ]);
bch2_fs_compress_exit(c);
- lg_lock_free(&c->usage_lock);
- free_percpu(c->usage_percpu);
+ bch2_journal_keys_free(&c->journal_keys);
+ bch2_journal_entries_free(c);
+ bch2_fs_btree_write_buffer_exit(c);
+ percpu_free_rwsem(&c->mark_lock);
+ free_percpu(c->online_reserved);
+
+ darray_exit(&c->btree_roots_extra);
+ free_percpu(c->pcpu);
+ mempool_exit(&c->large_bkey_pool);
mempool_exit(&c->btree_bounce_pool);
bioset_exit(&c->btree_bio);
- mempool_exit(&c->btree_interior_update_pool);
- mempool_exit(&c->btree_reserve_pool);
mempool_exit(&c->fill_iter);
+#ifndef BCH_WRITE_REF_DEBUG
percpu_ref_exit(&c->writes);
- kfree(rcu_dereference_protected(c->replicas, 1));
+#endif
kfree(rcu_dereference_protected(c->disk_groups, 1));
+ kfree(c->journal_seq_blacklist_table);
+ kfree(c->unused_inode_hints);
+ if (c->write_ref_wq)
+ destroy_workqueue(c->write_ref_wq);
+ if (c->io_complete_wq)
+ destroy_workqueue(c->io_complete_wq);
if (c->copygc_wq)
destroy_workqueue(c->copygc_wq);
- if (c->wq)
- destroy_workqueue(c->wq);
+ if (c->btree_io_complete_wq)
+ destroy_workqueue(c->btree_io_complete_wq);
+ if (c->btree_update_wq)
+ destroy_workqueue(c->btree_update_wq);
- free_pages((unsigned long) c->disk_sb.sb,
- c->disk_sb.page_order);
+ bch2_free_super(&c->disk_sb);
kvpfree(c, sizeof(*c));
module_put(THIS_MODULE);
}
{
struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
- bch2_fs_free(c);
+ __bch2_fs_free(c);
}
-void bch2_fs_stop(struct bch_fs *c)
+void __bch2_fs_stop(struct bch_fs *c)
{
struct bch_dev *ca;
unsigned i;
- mutex_lock(&c->state_lock);
- BUG_ON(c->state == BCH_FS_STOPPING);
- c->state = BCH_FS_STOPPING;
- mutex_unlock(&c->state_lock);
+ bch_verbose(c, "shutting down");
+
+ set_bit(BCH_FS_STOPPING, &c->flags);
+
+ cancel_work_sync(&c->journal_seq_blacklist_gc_work);
+
+ down_write(&c->state_lock);
+ bch2_fs_read_only(c);
+ up_write(&c->state_lock);
for_each_member_device(ca, c, i)
if (ca->kobj.state_in_sysfs &&
ca->disk_sb.bdev)
- sysfs_remove_link(&part_to_dev(ca->disk_sb.bdev->bd_part)->kobj,
- "bcachefs");
+ sysfs_remove_link(bdev_kobj(ca->disk_sb.bdev), "bcachefs");
if (c->kobj.state_in_sysfs)
kobject_del(&c->kobj);
bch2_fs_debug_exit(c);
bch2_fs_chardev_exit(c);
+ kobject_put(&c->counters_kobj);
kobject_put(&c->time_stats);
kobject_put(&c->opts_dir);
kobject_put(&c->internal);
+ /* btree prefetch might have kicked off reads in the background: */
+ bch2_btree_flush_all_reads(c);
+
+ for_each_member_device(ca, c, i)
+ cancel_work_sync(&ca->io_error_work);
+
+ cancel_work_sync(&c->read_only_work);
+}
+
+void bch2_fs_free(struct bch_fs *c)
+{
+ unsigned i;
+
mutex_lock(&bch_fs_list_lock);
list_del(&c->list);
mutex_unlock(&bch_fs_list_lock);
closure_sync(&c->cl);
closure_debug_destroy(&c->cl);
- mutex_lock(&c->state_lock);
- __bch2_fs_read_only(c);
- mutex_unlock(&c->state_lock);
-
- bch_fs_mark_clean(c);
+ for (i = 0; i < c->sb.nr_devices; i++) {
+ struct bch_dev *ca = rcu_dereference_protected(c->devs[i], true);
- /* btree prefetch might have kicked off reads in the background: */
- bch2_btree_flush_all_reads(c);
-
- for_each_member_device(ca, c, i)
- cancel_work_sync(&ca->io_error_work);
-
- cancel_work_sync(&c->btree_write_error_work);
- cancel_delayed_work_sync(&c->pd_controllers_update);
- cancel_work_sync(&c->read_only_work);
+ if (ca) {
+ bch2_free_super(&ca->disk_sb);
+ bch2_dev_free(ca);
+ }
+ }
- for (i = 0; i < c->sb.nr_devices; i++)
- if (c->devs[i])
- bch2_dev_free(rcu_dereference_protected(c->devs[i], 1));
+ bch_verbose(c, "shutdown complete");
kobject_put(&c->kobj);
}
-static const char *bch2_fs_online(struct bch_fs *c)
+void bch2_fs_stop(struct bch_fs *c)
+{
+ __bch2_fs_stop(c);
+ bch2_fs_free(c);
+}
+
+static int bch2_fs_online(struct bch_fs *c)
{
struct bch_dev *ca;
- const char *err = NULL;
unsigned i;
- int ret;
+ int ret = 0;
lockdep_assert_held(&bch_fs_list_lock);
- if (!list_empty(&c->list))
- return NULL;
-
- if (__bch2_uuid_to_fs(c->sb.uuid))
- return "filesystem UUID already open";
+ if (__bch2_uuid_to_fs(c->sb.uuid)) {
+ bch_err(c, "filesystem UUID already open");
+ return -EINVAL;
+ }
ret = bch2_fs_chardev_init(c);
- if (ret)
- return "error creating character device";
+ if (ret) {
+ bch_err(c, "error creating character device");
+ return ret;
+ }
bch2_fs_debug_init(c);
- if (kobject_add(&c->kobj, NULL, "%pU", c->sb.user_uuid.b) ||
- kobject_add(&c->internal, &c->kobj, "internal") ||
- kobject_add(&c->opts_dir, &c->kobj, "options") ||
- kobject_add(&c->time_stats, &c->kobj, "time_stats") ||
- bch2_opts_create_sysfs_files(&c->opts_dir))
- return "error creating sysfs objects";
+ ret = kobject_add(&c->kobj, NULL, "%pU", c->sb.user_uuid.b) ?:
+ kobject_add(&c->internal, &c->kobj, "internal") ?:
+ kobject_add(&c->opts_dir, &c->kobj, "options") ?:
+ kobject_add(&c->time_stats, &c->kobj, "time_stats") ?:
+ kobject_add(&c->counters_kobj, &c->kobj, "counters") ?:
+ bch2_opts_create_sysfs_files(&c->opts_dir);
+ if (ret) {
+ bch_err(c, "error creating sysfs objects");
+ return ret;
+ }
- mutex_lock(&c->state_lock);
+ down_write(&c->state_lock);
- err = "error creating sysfs objects";
- __for_each_member_device(ca, c, i, NULL)
- if (bch2_dev_sysfs_online(c, ca))
+ for_each_member_device(ca, c, i) {
+ ret = bch2_dev_sysfs_online(c, ca);
+ if (ret) {
+ bch_err(c, "error creating sysfs objects");
+ percpu_ref_put(&ca->ref);
goto err;
+ }
+ }
+ BUG_ON(!list_empty(&c->list));
list_add(&c->list, &bch_fs_list);
- err = NULL;
err:
- mutex_unlock(&c->state_lock);
- return err;
+ up_write(&c->state_lock);
+ return ret;
}
static struct bch_fs *bch2_fs_alloc(struct bch_sb *sb, struct bch_opts opts)
{
- struct bch_sb_field_members *mi;
struct bch_fs *c;
+ struct printbuf name = PRINTBUF;
unsigned i, iter_size;
- const char *err;
-
- pr_verbose_init(opts, "");
+ int ret = 0;
c = kvpmalloc(sizeof(struct bch_fs), GFP_KERNEL|__GFP_ZERO);
- if (!c)
+ if (!c) {
+ c = ERR_PTR(-BCH_ERR_ENOMEM_fs_alloc);
goto out;
+ }
__module_get(THIS_MODULE);
+ closure_init(&c->cl, NULL);
+
+ c->kobj.kset = bcachefs_kset;
+ kobject_init(&c->kobj, &bch2_fs_ktype);
+ kobject_init(&c->internal, &bch2_fs_internal_ktype);
+ kobject_init(&c->opts_dir, &bch2_fs_opts_dir_ktype);
+ kobject_init(&c->time_stats, &bch2_fs_time_stats_ktype);
+ kobject_init(&c->counters_kobj, &bch2_fs_counters_ktype);
+
c->minor = -1;
c->disk_sb.fs_sb = true;
- mutex_init(&c->state_lock);
+ init_rwsem(&c->state_lock);
mutex_init(&c->sb_lock);
mutex_init(&c->replicas_gc_lock);
mutex_init(&c->btree_root_lock);
INIT_WORK(&c->read_only_work, bch2_fs_read_only_work);
init_rwsem(&c->gc_lock);
+ mutex_init(&c->gc_gens_lock);
for (i = 0; i < BCH_TIME_STAT_NR; i++)
bch2_time_stats_init(&c->times[i]);
- bch2_fs_allocator_init(c);
+ bch2_fs_copygc_init(c);
+ bch2_fs_btree_key_cache_init_early(&c->btree_key_cache);
+ bch2_fs_btree_interior_update_init_early(c);
+ bch2_fs_allocator_background_init(c);
+ bch2_fs_allocator_foreground_init(c);
bch2_fs_rebalance_init(c);
bch2_fs_quota_init(c);
+ bch2_fs_ec_init_early(c);
+ bch2_fs_move_init(c);
INIT_LIST_HEAD(&c->list);
- INIT_LIST_HEAD(&c->btree_interior_update_list);
- mutex_init(&c->btree_reserve_cache_lock);
- mutex_init(&c->btree_interior_update_lock);
+ mutex_init(&c->usage_scratch_lock);
mutex_init(&c->bio_bounce_pages_lock);
+ mutex_init(&c->snapshot_table_lock);
+ init_rwsem(&c->snapshot_create_lock);
- bio_list_init(&c->btree_write_error_list);
spin_lock_init(&c->btree_write_error_lock);
- INIT_WORK(&c->btree_write_error_work, bch2_btree_write_error_work);
+
+ INIT_WORK(&c->journal_seq_blacklist_gc_work,
+ bch2_blacklist_entries_gc);
+
+ INIT_LIST_HEAD(&c->journal_iters);
INIT_LIST_HEAD(&c->fsck_errors);
mutex_init(&c->fsck_error_lock);
seqcount_init(&c->gc_pos_lock);
+ seqcount_init(&c->usage_lock);
+
+ sema_init(&c->io_in_flight, 128);
+
+ INIT_LIST_HEAD(&c->vfs_inodes_list);
+ mutex_init(&c->vfs_inodes_lock);
+
c->copy_gc_enabled = 1;
c->rebalance.enabled = 1;
c->promote_whole_extents = true;
- c->journal.write_time = &c->times[BCH_TIME_journal_write];
- c->journal.delay_time = &c->times[BCH_TIME_journal_delay];
- c->journal.blocked_time = &c->times[BCH_TIME_journal_blocked];
- c->journal.flush_seq_time = &c->times[BCH_TIME_journal_flush_seq];
+ c->journal.flush_write_time = &c->times[BCH_TIME_journal_flush_write];
+ c->journal.noflush_write_time = &c->times[BCH_TIME_journal_noflush_write];
+ c->journal.blocked_time = &c->times[BCH_TIME_blocked_journal];
+ c->journal.flush_seq_time = &c->times[BCH_TIME_journal_flush_seq];
bch2_fs_btree_cache_init_early(&c->btree_cache);
- mutex_lock(&c->sb_lock);
+ mutex_init(&c->sectors_available_lock);
- if (bch2_sb_to_fs(c, sb)) {
- mutex_unlock(&c->sb_lock);
+ ret = percpu_init_rwsem(&c->mark_lock);
+ if (ret)
goto err;
- }
+ mutex_lock(&c->sb_lock);
+ ret = bch2_sb_to_fs(c, sb);
mutex_unlock(&c->sb_lock);
- scnprintf(c->name, sizeof(c->name), "%pU", &c->sb.user_uuid);
+ if (ret)
+ goto err;
+
+ pr_uuid(&name, c->sb.user_uuid.b);
+ strscpy(c->name, name.buf, sizeof(c->name));
+ printbuf_exit(&name);
+
+ ret = name.allocation_failure ? -BCH_ERR_ENOMEM_fs_name_alloc : 0;
+ if (ret)
+ goto err;
+
+ /* Compat: */
+ if (le16_to_cpu(sb->version) <= bcachefs_metadata_version_inode_v2 &&
+ !BCH_SB_JOURNAL_FLUSH_DELAY(sb))
+ SET_BCH_SB_JOURNAL_FLUSH_DELAY(sb, 1000);
+
+ if (le16_to_cpu(sb->version) <= bcachefs_metadata_version_inode_v2 &&
+ !BCH_SB_JOURNAL_RECLAIM_DELAY(sb))
+ SET_BCH_SB_JOURNAL_RECLAIM_DELAY(sb, 100);
c->opts = bch2_opts_default;
- bch2_opts_apply(&c->opts, bch2_opts_from_sb(sb));
+ ret = bch2_opts_from_sb(&c->opts, sb);
+ if (ret)
+ goto err;
+
bch2_opts_apply(&c->opts, opts);
- c->block_bits = ilog2(c->opts.block_size);
- c->btree_foreground_merge_threshold = BTREE_FOREGROUND_MERGE_THRESHOLD(c);
+ c->btree_key_cache_btrees |= 1U << BTREE_ID_alloc;
+ if (c->opts.inodes_use_key_cache)
+ c->btree_key_cache_btrees |= 1U << BTREE_ID_inodes;
+ c->btree_key_cache_btrees |= 1U << BTREE_ID_logged_ops;
- c->opts.nochanges |= c->opts.noreplay;
- c->opts.read_only |= c->opts.nochanges;
+ c->block_bits = ilog2(block_sectors(c));
+ c->btree_foreground_merge_threshold = BTREE_FOREGROUND_MERGE_THRESHOLD(c);
- if (bch2_fs_init_fault("fs_alloc"))
+ if (bch2_fs_init_fault("fs_alloc")) {
+ bch_err(c, "fs_alloc fault injected");
+ ret = -EFAULT;
goto err;
+ }
- iter_size = sizeof(struct btree_node_iter_large) +
+ iter_size = sizeof(struct sort_iter) +
(btree_blocks(c) + 1) * 2 *
- sizeof(struct btree_node_iter_set);
-
- if (!(c->wq = alloc_workqueue("bcachefs",
- WQ_FREEZABLE|WQ_MEM_RECLAIM|WQ_HIGHPRI, 1)) ||
- !(c->copygc_wq = alloc_workqueue("bcache_copygc",
- WQ_FREEZABLE|WQ_MEM_RECLAIM|WQ_HIGHPRI, 1)) ||
- percpu_ref_init(&c->writes, bch2_writes_disabled, 0, GFP_KERNEL) ||
- mempool_init_kmalloc_pool(&c->btree_reserve_pool, 1,
- sizeof(struct btree_reserve)) ||
- mempool_init_kmalloc_pool(&c->btree_interior_update_pool, 1,
- sizeof(struct btree_update)) ||
+ sizeof(struct sort_iter_set);
+
+ c->inode_shard_bits = ilog2(roundup_pow_of_two(num_possible_cpus()));
+
+ if (!(c->btree_update_wq = alloc_workqueue("bcachefs",
+ WQ_FREEZABLE|WQ_UNBOUND|WQ_MEM_RECLAIM, 512)) ||
+ !(c->btree_io_complete_wq = alloc_workqueue("bcachefs_btree_io",
+ WQ_FREEZABLE|WQ_MEM_RECLAIM, 1)) ||
+ !(c->copygc_wq = alloc_workqueue("bcachefs_copygc",
+ WQ_FREEZABLE|WQ_MEM_RECLAIM|WQ_CPU_INTENSIVE, 1)) ||
+ !(c->io_complete_wq = alloc_workqueue("bcachefs_io",
+ WQ_FREEZABLE|WQ_HIGHPRI|WQ_MEM_RECLAIM, 1)) ||
+ !(c->write_ref_wq = alloc_workqueue("bcachefs_write_ref",
+ WQ_FREEZABLE, 0)) ||
+#ifndef BCH_WRITE_REF_DEBUG
+ percpu_ref_init(&c->writes, bch2_writes_disabled,
+ PERCPU_REF_INIT_DEAD, GFP_KERNEL) ||
+#endif
mempool_init_kmalloc_pool(&c->fill_iter, 1, iter_size) ||
bioset_init(&c->btree_bio, 1,
max(offsetof(struct btree_read_bio, bio),
offsetof(struct btree_write_bio, wbio.bio)),
BIOSET_NEED_BVECS) ||
- !(c->usage_percpu = alloc_percpu(struct bch_fs_usage)) ||
- lg_lock_init(&c->usage_lock) ||
+ !(c->pcpu = alloc_percpu(struct bch_fs_pcpu)) ||
+ !(c->online_reserved = alloc_percpu(u64)) ||
mempool_init_kvpmalloc_pool(&c->btree_bounce_pool, 1,
btree_bytes(c)) ||
- bch2_io_clock_init(&c->io_clock[READ]) ||
- bch2_io_clock_init(&c->io_clock[WRITE]) ||
- bch2_fs_journal_init(&c->journal) ||
- bch2_fs_btree_cache_init(c) ||
- bch2_fs_io_init(c) ||
- bch2_fs_encryption_init(c) ||
- bch2_fs_compress_init(c) ||
- bch2_fs_fsio_init(c))
+ mempool_init_kmalloc_pool(&c->large_bkey_pool, 1, 2048) ||
+ !(c->unused_inode_hints = kcalloc(1U << c->inode_shard_bits,
+ sizeof(u64), GFP_KERNEL))) {
+ ret = -BCH_ERR_ENOMEM_fs_other_alloc;
+ goto err;
+ }
+
+ ret = bch2_fs_counters_init(c) ?:
+ bch2_io_clock_init(&c->io_clock[READ]) ?:
+ bch2_io_clock_init(&c->io_clock[WRITE]) ?:
+ bch2_fs_journal_init(&c->journal) ?:
+ bch2_fs_replicas_init(c) ?:
+ bch2_fs_btree_cache_init(c) ?:
+ bch2_fs_btree_key_cache_init(&c->btree_key_cache) ?:
+ bch2_fs_btree_iter_init(c) ?:
+ bch2_fs_btree_interior_update_init(c) ?:
+ bch2_fs_buckets_waiting_for_journal_init(c) ?:
+ bch2_fs_btree_write_buffer_init(c) ?:
+ bch2_fs_subvolumes_init(c) ?:
+ bch2_fs_io_read_init(c) ?:
+ bch2_fs_io_write_init(c) ?:
+ bch2_fs_nocow_locking_init(c) ?:
+ bch2_fs_encryption_init(c) ?:
+ bch2_fs_compress_init(c) ?:
+ bch2_fs_ec_init(c) ?:
+ bch2_fs_fsio_init(c) ?:
+ bch2_fs_fs_io_buffered_init(c) ?:
+ bch2_fs_fs_io_direct_init(c);
+ if (ret)
goto err;
- mi = bch2_sb_get_members(c->disk_sb.sb);
for (i = 0; i < c->sb.nr_devices; i++)
- if (bch2_dev_exists(c->disk_sb.sb, mi, i) &&
- bch2_dev_alloc(c, i))
+ if (bch2_dev_exists(c->disk_sb.sb, i) &&
+ bch2_dev_alloc(c, i)) {
+ ret = -EEXIST;
goto err;
+ }
- /*
- * Now that all allocations have succeeded, init various refcounty
- * things that let us shutdown:
- */
- closure_init(&c->cl, NULL);
-
- c->kobj.kset = bcachefs_kset;
- kobject_init(&c->kobj, &bch2_fs_ktype);
- kobject_init(&c->internal, &bch2_fs_internal_ktype);
- kobject_init(&c->opts_dir, &bch2_fs_opts_dir_ktype);
- kobject_init(&c->time_stats, &bch2_fs_time_stats_ktype);
+ bch2_journal_entry_res_resize(&c->journal,
+ &c->btree_root_journal_res,
+ BTREE_ID_NR * (JSET_KEYS_U64s + BKEY_BTREE_PTR_U64s_MAX));
+ bch2_dev_usage_journal_reserve(c);
+ bch2_journal_entry_res_resize(&c->journal,
+ &c->clock_journal_res,
+ (sizeof(struct jset_entry_clock) / sizeof(u64)) * 2);
mutex_lock(&bch_fs_list_lock);
- err = bch2_fs_online(c);
+ ret = bch2_fs_online(c);
mutex_unlock(&bch_fs_list_lock);
- if (err) {
- bch_err(c, "bch2_fs_online() error: %s", err);
+
+ if (ret)
goto err;
- }
out:
- pr_verbose_init(opts, "ret %i", c ? 0 : -ENOMEM);
return c;
err:
bch2_fs_free(c);
- c = NULL;
+ c = ERR_PTR(ret);
goto out;
}
-const char *bch2_fs_start(struct bch_fs *c)
+noinline_for_stack
+static void print_mount_opts(struct bch_fs *c)
{
- const char *err = "cannot allocate memory";
- struct bch_sb_field_members *mi;
- struct bch_dev *ca;
- LIST_HEAD(journal);
- struct jset *j;
- time64_t now;
- unsigned i;
- int ret = -EINVAL;
-
- mutex_lock(&c->state_lock);
+ enum bch_opt_id i;
+ struct printbuf p = PRINTBUF;
+ bool first = true;
- BUG_ON(c->state != BCH_FS_STARTING);
+ prt_str(&p, "mounting version ");
+ bch2_version_to_text(&p, c->sb.version);
- mutex_lock(&c->sb_lock);
- for_each_online_member(ca, c, i)
- bch2_sb_from_fs(c, ca);
- mutex_unlock(&c->sb_lock);
-
- for_each_rw_member(ca, c, i)
- bch2_dev_allocator_add(c, ca);
- bch2_recalc_capacity(c);
-
- if (BCH_SB_INITIALIZED(c->disk_sb.sb)) {
- ret = bch2_journal_read(c, &journal);
- if (ret)
- goto err;
-
- j = &list_entry(journal.prev, struct journal_replay, list)->j;
-
- c->bucket_clock[READ].hand = le16_to_cpu(j->read_clock);
- c->bucket_clock[WRITE].hand = le16_to_cpu(j->write_clock);
-
- for (i = 0; i < BTREE_ID_NR; i++) {
- unsigned level;
- struct bkey_i *k;
-
- k = bch2_journal_find_btree_root(c, j, i, &level);
- if (!k)
- continue;
-
- err = "invalid btree root pointer";
- if (IS_ERR(k))
- goto err;
-
- err = "error reading btree root";
- if (bch2_btree_root_read(c, i, k, level)) {
- if (i != BTREE_ID_ALLOC)
- goto err;
-
- mustfix_fsck_err(c, "error reading btree root");
- }
- }
-
- for (i = 0; i < BTREE_ID_NR; i++)
- if (!c->btree_roots[i].b)
- bch2_btree_root_alloc(c, i);
-
- err = "error reading allocation information";
- ret = bch2_alloc_read(c, &journal);
- if (ret)
- goto err;
-
- set_bit(BCH_FS_ALLOC_READ_DONE, &c->flags);
-
- bch_verbose(c, "starting mark and sweep:");
- err = "error in recovery";
- ret = bch2_initial_gc(c, &journal);
- if (ret)
- goto err;
- bch_verbose(c, "mark and sweep done");
-
- if (c->opts.noreplay)
- goto recovery_done;
-
- /*
- * bch2_fs_journal_start() can't happen sooner, or btree_gc_finish()
- * will give spurious errors about oldest_gen > bucket_gen -
- * this is a hack but oh well.
- */
- bch2_fs_journal_start(&c->journal);
-
- err = "error starting allocator";
- if (bch2_fs_allocator_start(c))
- goto err;
-
- bch_verbose(c, "starting journal replay:");
- err = "journal replay failed";
- ret = bch2_journal_replay(c, &journal);
- if (ret)
- goto err;
- bch_verbose(c, "journal replay done");
-
- if (c->opts.norecovery)
- goto recovery_done;
-
- bch_verbose(c, "starting fsck:");
- err = "error in fsck";
- ret = bch2_fsck(c, !c->opts.nofsck);
- if (ret)
- goto err;
- bch_verbose(c, "fsck done");
-
- if (enabled_qtypes(c)) {
- bch_verbose(c, "reading quotas:");
- ret = bch2_fs_quota_read(c);
- if (ret)
- goto err;
- bch_verbose(c, "quotas done");
- }
- } else {
- struct bch_inode_unpacked inode;
- struct bkey_inode_buf packed_inode;
+ if (c->opts.read_only) {
+ prt_str(&p, " opts=");
+ first = false;
+ prt_printf(&p, "ro");
+ }
- bch_notice(c, "initializing new filesystem");
+ for (i = 0; i < bch2_opts_nr; i++) {
+ const struct bch_option *opt = &bch2_opt_table[i];
+ u64 v = bch2_opt_get_by_id(&c->opts, i);
- set_bit(BCH_FS_ALLOC_READ_DONE, &c->flags);
+ if (!(opt->flags & OPT_MOUNT))
+ continue;
- ret = bch2_initial_gc(c, &journal);
- if (ret)
- goto err;
-
- err = "unable to allocate journal buckets";
- for_each_online_member(ca, c, i)
- if (bch2_dev_journal_alloc(ca)) {
- percpu_ref_put(&ca->io_ref);
- goto err;
- }
+ if (v == bch2_opt_get_by_id(&bch2_opts_default, i))
+ continue;
- for (i = 0; i < BTREE_ID_NR; i++)
- bch2_btree_root_alloc(c, i);
+ prt_str(&p, first ? " opts=" : ",");
+ first = false;
+ bch2_opt_to_text(&p, c, c->disk_sb.sb, opt, v, OPT_SHOW_MOUNT_STYLE);
+ }
- /*
- * journal_res_get() will crash if called before this has
- * set up the journal.pin FIFO and journal.cur pointer:
- */
- bch2_fs_journal_start(&c->journal);
- bch2_journal_set_replay_done(&c->journal);
+ bch_info(c, "%s", p.buf);
+ printbuf_exit(&p);
+}
- err = "error starting allocator";
- if (bch2_fs_allocator_start(c))
- goto err;
+int bch2_fs_start(struct bch_fs *c)
+{
+ struct bch_dev *ca;
+ time64_t now = ktime_get_real_seconds();
+ unsigned i;
+ int ret;
- bch2_inode_init(c, &inode, 0, 0,
- S_IFDIR|S_IRWXU|S_IRUGO|S_IXUGO, 0, NULL);
- inode.bi_inum = BCACHEFS_ROOT_INO;
+ print_mount_opts(c);
- bch2_inode_pack(&packed_inode, &inode);
+ down_write(&c->state_lock);
- err = "error creating root directory";
- if (bch2_btree_insert(c, BTREE_ID_INODES,
- &packed_inode.inode.k_i,
- NULL, NULL, NULL, 0))
- goto err;
+ BUG_ON(test_bit(BCH_FS_STARTED, &c->flags));
- if (enabled_qtypes(c)) {
- ret = bch2_fs_quota_read(c);
- if (ret)
- goto err;
- }
+ mutex_lock(&c->sb_lock);
- err = "error writing first journal entry";
- if (bch2_journal_meta(&c->journal))
- goto err;
- }
-recovery_done:
- err = "dynamic fault";
- if (bch2_fs_init_fault("fs_start"))
+ ret = bch2_members_v2_init(c);
+ if (ret) {
+ mutex_unlock(&c->sb_lock);
goto err;
-
- if (c->opts.read_only) {
- bch2_fs_read_only(c);
- } else {
- err = bch2_fs_read_write(c);
- if (err)
- goto err;
}
- mutex_lock(&c->sb_lock);
- mi = bch2_sb_get_members(c->disk_sb.sb);
- now = ktime_get_seconds();
+ for_each_online_member(ca, c, i)
+ bch2_members_v2_get_mut(c->disk_sb.sb, i)->last_mount = cpu_to_le64(now);
- for_each_member_device(ca, c, i)
- mi->members[ca->dev_idx].last_mount = cpu_to_le64(now);
+ mutex_unlock(&c->sb_lock);
- SET_BCH_SB_INITIALIZED(c->disk_sb.sb, true);
- SET_BCH_SB_CLEAN(c->disk_sb.sb, false);
+ for_each_rw_member(ca, c, i)
+ bch2_dev_allocator_add(c, ca);
+ bch2_recalc_capacity(c);
- bch2_write_super(c);
- mutex_unlock(&c->sb_lock);
+ ret = BCH_SB_INITIALIZED(c->disk_sb.sb)
+ ? bch2_fs_recovery(c)
+ : bch2_fs_initialize(c);
+ if (ret)
+ goto err;
+
+ ret = bch2_opts_check_may_set(c);
+ if (ret)
+ goto err;
+
+ if (bch2_fs_init_fault("fs_start")) {
+ bch_err(c, "fs_start fault injected");
+ ret = -EINVAL;
+ goto err;
+ }
set_bit(BCH_FS_STARTED, &c->flags);
- err = NULL;
+ if (c->opts.read_only || c->opts.nochanges) {
+ bch2_fs_read_only(c);
+ } else {
+ ret = !test_bit(BCH_FS_RW, &c->flags)
+ ? bch2_fs_read_write(c)
+ : bch2_fs_read_write_late(c);
+ if (ret)
+ goto err;
+ }
+
+ ret = 0;
out:
- mutex_unlock(&c->state_lock);
- bch2_journal_entries_free(&journal);
- return err;
+ up_write(&c->state_lock);
+ return ret;
err:
-fsck_err:
- switch (ret) {
- case BCH_FSCK_ERRORS_NOT_FIXED:
- bch_err(c, "filesystem contains errors: please report this to the developers");
- pr_cont("mount with -o fix_errors to repair\n");
- err = "fsck error";
- break;
- case BCH_FSCK_REPAIR_UNIMPLEMENTED:
- bch_err(c, "filesystem contains errors: please report this to the developers");
- pr_cont("repair unimplemented: inform the developers so that it can be added\n");
- err = "fsck error";
- break;
- case BCH_FSCK_REPAIR_IMPOSSIBLE:
- bch_err(c, "filesystem contains errors, but repair impossible");
- err = "fsck error";
- break;
- case BCH_FSCK_UNKNOWN_VERSION:
- err = "unknown metadata version";;
- break;
- case -ENOMEM:
- err = "cannot allocate memory";
- break;
- case -EIO:
- err = "IO error";
- break;
- }
-
- BUG_ON(!err);
- set_bit(BCH_FS_ERROR, &c->flags);
+ bch_err_msg(c, ret, "starting filesystem");
goto out;
}
-static const char *bch2_dev_may_add(struct bch_sb *sb, struct bch_fs *c)
+static int bch2_dev_may_add(struct bch_sb *sb, struct bch_fs *c)
{
- struct bch_sb_field_members *sb_mi;
-
- sb_mi = bch2_sb_get_members(sb);
- if (!sb_mi)
- return "Invalid superblock: member info area missing";
+ struct bch_member m = bch2_sb_member_get(sb, sb->dev_idx);
- if (le16_to_cpu(sb->block_size) != c->opts.block_size)
- return "mismatched block size";
+ if (le16_to_cpu(sb->block_size) != block_sectors(c))
+ return -BCH_ERR_mismatched_block_size;
- if (le16_to_cpu(sb_mi->members[sb->dev_idx].bucket_size) <
+ if (le16_to_cpu(m.bucket_size) <
BCH_SB_BTREE_NODE_SIZE(c->disk_sb.sb))
- return "new cache bucket size is too small";
+ return -BCH_ERR_bucket_size_too_small;
- return NULL;
+ return 0;
}
-static const char *bch2_dev_in_fs(struct bch_sb *fs, struct bch_sb *sb)
+static int bch2_dev_in_fs(struct bch_sb *fs, struct bch_sb *sb)
{
struct bch_sb *newest =
le64_to_cpu(fs->seq) > le64_to_cpu(sb->seq) ? fs : sb;
- struct bch_sb_field_members *mi = bch2_sb_get_members(newest);
- if (uuid_le_cmp(fs->uuid, sb->uuid))
- return "device not a member of filesystem";
+ if (!uuid_equal(&fs->uuid, &sb->uuid))
+ return -BCH_ERR_device_not_a_member_of_filesystem;
- if (!bch2_dev_exists(newest, mi, sb->dev_idx))
- return "device has been removed";
+ if (!bch2_dev_exists(newest, sb->dev_idx))
+ return -BCH_ERR_device_has_been_removed;
if (fs->block_size != sb->block_size)
- return "mismatched block size";
+ return -BCH_ERR_mismatched_block_size;
- return NULL;
+ return 0;
}
/* Device startup/shutdown: */
if (ca->kobj.state_in_sysfs &&
ca->disk_sb.bdev)
- sysfs_remove_link(&part_to_dev(ca->disk_sb.bdev->bd_part)->kobj,
- "bcachefs");
+ sysfs_remove_link(bdev_kobj(ca->disk_sb.bdev), "bcachefs");
if (ca->kobj.state_in_sysfs)
kobject_del(&ca->kobj);
free_percpu(ca->io_done);
bioset_exit(&ca->replica_set);
bch2_dev_buckets_free(ca);
+ free_page((unsigned long) ca->sb_read_scratch);
bch2_time_stats_exit(&ca->io_latency[WRITE]);
bch2_time_stats_exit(&ca->io_latency[READ]);
wait_for_completion(&ca->io_ref_completion);
if (ca->kobj.state_in_sysfs) {
- struct kobject *block =
- &part_to_dev(ca->disk_sb.bdev->bd_part)->kobj;
-
- sysfs_remove_link(block, "bcachefs");
+ sysfs_remove_link(bdev_kobj(ca->disk_sb.bdev), "bcachefs");
sysfs_remove_link(&ca->kobj, "block");
}
}
if (ca->disk_sb.bdev) {
- struct kobject *block =
- &part_to_dev(ca->disk_sb.bdev->bd_part)->kobj;
+ struct kobject *block = bdev_kobj(ca->disk_sb.bdev);
ret = sysfs_create_link(block, &ca->kobj, "bcachefs");
if (ret)
return ret;
+
ret = sysfs_create_link(&ca->kobj, block, "block");
if (ret)
return ret;
init_rwsem(&ca->bucket_lock);
- writepoint_init(&ca->copygc_write_point, BCH_DATA_USER);
-
- spin_lock_init(&ca->freelist_lock);
- bch2_dev_copygc_init(ca);
-
INIT_WORK(&ca->io_error_work, bch2_io_error_work);
bch2_time_stats_init(&ca->io_latency[READ]);
ca->mi = bch2_mi_to_cpu(member);
ca->uuid = member->uuid;
+ ca->nr_btree_reserve = DIV_ROUND_UP(BTREE_NODE_RESERVE,
+ ca->mi.bucket_size / btree_sectors(c));
+
if (percpu_ref_init(&ca->ref, bch2_dev_ref_complete,
0, GFP_KERNEL) ||
percpu_ref_init(&ca->io_ref, bch2_dev_io_ref_complete,
PERCPU_REF_INIT_DEAD, GFP_KERNEL) ||
+ !(ca->sb_read_scratch = (void *) __get_free_page(GFP_KERNEL)) ||
bch2_dev_buckets_alloc(c, ca) ||
bioset_init(&ca->replica_set, 4,
offsetof(struct bch_write_bio, bio), 0) ||
static int bch2_dev_alloc(struct bch_fs *c, unsigned dev_idx)
{
- struct bch_member *member =
- bch2_sb_get_members(c->disk_sb.sb)->members + dev_idx;
+ struct bch_member member = bch2_sb_member_get(c->disk_sb.sb, dev_idx);
struct bch_dev *ca = NULL;
int ret = 0;
- pr_verbose_init(c->opts, "");
-
if (bch2_fs_init_fault("dev_alloc"))
goto err;
- ca = __bch2_dev_alloc(c, member);
+ ca = __bch2_dev_alloc(c, &member);
if (!ca)
goto err;
+ ca->fs = c;
+
bch2_dev_attach(c, ca, dev_idx);
-out:
- pr_verbose_init(c->opts, "ret %i", ret);
return ret;
err:
if (ca)
bch2_dev_free(ca);
- ret = -ENOMEM;
- goto out;
+ return -BCH_ERR_ENOMEM_dev_alloc;
}
static int __bch2_dev_attach_bdev(struct bch_dev *ca, struct bch_sb_handle *sb)
if (bch2_dev_is_online(ca)) {
bch_err(ca, "already have device online in slot %u",
sb->sb->dev_idx);
- return -EINVAL;
+ return -BCH_ERR_device_already_online;
}
if (get_capacity(sb->bdev->bd_disk) <
ca->mi.bucket_size * ca->mi.nbuckets) {
bch_err(ca, "cannot online: device too small");
- return -EINVAL;
+ return -BCH_ERR_device_size_too_small;
}
BUG_ON(!percpu_ref_is_zero(&ca->io_ref));
- if (get_capacity(sb->bdev->bd_disk) <
- ca->mi.bucket_size * ca->mi.nbuckets) {
- bch_err(ca, "device too small");
- return -EINVAL;
- }
-
ret = bch2_dev_journal_init(ca, sb->sb);
if (ret)
return ret;
/* Commit: */
ca->disk_sb = *sb;
- if (sb->mode & FMODE_EXCL)
- ca->disk_sb.bdev->bd_holder = ca;
memset(sb, 0, sizeof(*sb));
- if (ca->fs)
- mutex_lock(&ca->fs->sb_lock);
-
- bch2_mark_dev_superblock(ca->fs, ca, BCH_BUCKET_MARK_MAY_MAKE_UNAVAILABLE);
-
- if (ca->fs)
- mutex_unlock(&ca->fs->sb_lock);
+ ca->dev = ca->disk_sb.bdev->bd_dev;
percpu_ref_reinit(&ca->io_ref);
if (ret)
return ret;
+ bch2_dev_sysfs_online(c, ca);
+
if (c->sb.nr_devices == 1)
- bdevname(ca->disk_sb.bdev, c->name);
- bdevname(ca->disk_sb.bdev, ca->name);
+ snprintf(c->name, sizeof(c->name), "%pg", ca->disk_sb.bdev);
+ snprintf(ca->name, sizeof(ca->name), "%pg", ca->disk_sb.bdev);
rebalance_wakeup(c);
return 0;
enum bch_member_state new_state, int flags)
{
struct bch_devs_mask new_online_devs;
- struct replicas_status s;
struct bch_dev *ca2;
int i, nr_rw = 0, required;
lockdep_assert_held(&c->state_lock);
switch (new_state) {
- case BCH_MEMBER_STATE_RW:
+ case BCH_MEMBER_STATE_rw:
return true;
- case BCH_MEMBER_STATE_RO:
- if (ca->mi.state != BCH_MEMBER_STATE_RW)
+ case BCH_MEMBER_STATE_ro:
+ if (ca->mi.state != BCH_MEMBER_STATE_rw)
return true;
/* do we have enough devices to write to? */
for_each_member_device(ca2, c, i)
if (ca2 != ca)
- nr_rw += ca2->mi.state == BCH_MEMBER_STATE_RW;
+ nr_rw += ca2->mi.state == BCH_MEMBER_STATE_rw;
required = max(!(flags & BCH_FORCE_IF_METADATA_DEGRADED)
? c->opts.metadata_replicas
: c->opts.data_replicas_required);
return nr_rw >= required;
- case BCH_MEMBER_STATE_FAILED:
- case BCH_MEMBER_STATE_SPARE:
- if (ca->mi.state != BCH_MEMBER_STATE_RW &&
- ca->mi.state != BCH_MEMBER_STATE_RO)
+ case BCH_MEMBER_STATE_failed:
+ case BCH_MEMBER_STATE_spare:
+ if (ca->mi.state != BCH_MEMBER_STATE_rw &&
+ ca->mi.state != BCH_MEMBER_STATE_ro)
return true;
/* do we have enough devices to read from? */
new_online_devs = bch2_online_devs(c);
__clear_bit(ca->dev_idx, new_online_devs.d);
- s = __bch2_replicas_status(c, new_online_devs);
-
- return bch2_have_enough_devs(s, flags);
+ return bch2_have_enough_devs(c, new_online_devs, flags, false);
default:
BUG();
}
static bool bch2_fs_may_start(struct bch_fs *c)
{
- struct replicas_status s;
- struct bch_sb_field_members *mi;
struct bch_dev *ca;
- unsigned i, flags = c->opts.degraded
- ? BCH_FORCE_IF_DEGRADED
- : 0;
+ unsigned i, flags = 0;
+
+ if (c->opts.very_degraded)
+ flags |= BCH_FORCE_IF_DEGRADED|BCH_FORCE_IF_LOST;
- if (!c->opts.degraded) {
+ if (c->opts.degraded)
+ flags |= BCH_FORCE_IF_DEGRADED;
+
+ if (!c->opts.degraded &&
+ !c->opts.very_degraded) {
mutex_lock(&c->sb_lock);
- mi = bch2_sb_get_members(c->disk_sb.sb);
for (i = 0; i < c->disk_sb.sb->nr_devices; i++) {
- if (!bch2_dev_exists(c->disk_sb.sb, mi, i))
+ if (!bch2_dev_exists(c->disk_sb.sb, i))
continue;
ca = bch_dev_locked(c, i);
if (!bch2_dev_is_online(ca) &&
- (ca->mi.state == BCH_MEMBER_STATE_RW ||
- ca->mi.state == BCH_MEMBER_STATE_RO)) {
+ (ca->mi.state == BCH_MEMBER_STATE_rw ||
+ ca->mi.state == BCH_MEMBER_STATE_ro)) {
mutex_unlock(&c->sb_lock);
return false;
}
mutex_unlock(&c->sb_lock);
}
- s = bch2_replicas_status(c);
-
- return bch2_have_enough_devs(s, flags);
+ return bch2_have_enough_devs(c, bch2_online_devs(c), flags, true);
}
static void __bch2_dev_read_only(struct bch_fs *c, struct bch_dev *ca)
{
- bch2_copygc_stop(ca);
-
/*
* The allocator thread itself allocates btree nodes, so stop it first:
*/
- bch2_dev_allocator_stop(ca);
bch2_dev_allocator_remove(c, ca);
bch2_dev_journal_stop(&c->journal, ca);
}
-static const char *__bch2_dev_read_write(struct bch_fs *c, struct bch_dev *ca)
+static void __bch2_dev_read_write(struct bch_fs *c, struct bch_dev *ca)
{
lockdep_assert_held(&c->state_lock);
- BUG_ON(ca->mi.state != BCH_MEMBER_STATE_RW);
+ BUG_ON(ca->mi.state != BCH_MEMBER_STATE_rw);
bch2_dev_allocator_add(c, ca);
bch2_recalc_capacity(c);
-
- if (bch2_dev_allocator_start(ca))
- return "error starting allocator thread";
-
- if (bch2_copygc_start(c, ca))
- return "error starting copygc thread";
-
- return NULL;
}
int __bch2_dev_set_state(struct bch_fs *c, struct bch_dev *ca,
enum bch_member_state new_state, int flags)
{
- struct bch_sb_field_members *mi;
+ struct bch_member *m;
int ret = 0;
if (ca->mi.state == new_state)
return 0;
if (!bch2_dev_state_allowed(c, ca, new_state, flags))
- return -EINVAL;
+ return -BCH_ERR_device_state_not_allowed;
- if (new_state != BCH_MEMBER_STATE_RW)
+ if (new_state != BCH_MEMBER_STATE_rw)
__bch2_dev_read_only(c, ca);
- bch_notice(ca, "%s", bch2_dev_state[new_state]);
+ bch_notice(ca, "%s", bch2_member_states[new_state]);
mutex_lock(&c->sb_lock);
- mi = bch2_sb_get_members(c->disk_sb.sb);
- SET_BCH_MEMBER_STATE(&mi->members[ca->dev_idx], new_state);
+ m = bch2_members_v2_get_mut(c->disk_sb.sb, ca->dev_idx);
+ SET_BCH_MEMBER_STATE(m, new_state);
bch2_write_super(c);
mutex_unlock(&c->sb_lock);
- if (new_state == BCH_MEMBER_STATE_RW &&
- __bch2_dev_read_write(c, ca))
- ret = -ENOMEM;
+ if (new_state == BCH_MEMBER_STATE_rw)
+ __bch2_dev_read_write(c, ca);
rebalance_wakeup(c);
{
int ret;
- mutex_lock(&c->state_lock);
+ down_write(&c->state_lock);
ret = __bch2_dev_set_state(c, ca, new_state, flags);
- mutex_unlock(&c->state_lock);
+ up_write(&c->state_lock);
return ret;
}
/* Device add/removal: */
+static int bch2_dev_remove_alloc(struct bch_fs *c, struct bch_dev *ca)
+{
+ struct bpos start = POS(ca->dev_idx, 0);
+ struct bpos end = POS(ca->dev_idx, U64_MAX);
+ int ret;
+
+ /*
+ * We clear the LRU and need_discard btrees first so that we don't race
+ * with bch2_do_invalidates() and bch2_do_discards()
+ */
+ ret = bch2_btree_delete_range(c, BTREE_ID_lru, start, end,
+ BTREE_TRIGGER_NORUN, NULL) ?:
+ bch2_btree_delete_range(c, BTREE_ID_need_discard, start, end,
+ BTREE_TRIGGER_NORUN, NULL) ?:
+ bch2_btree_delete_range(c, BTREE_ID_freespace, start, end,
+ BTREE_TRIGGER_NORUN, NULL) ?:
+ bch2_btree_delete_range(c, BTREE_ID_backpointers, start, end,
+ BTREE_TRIGGER_NORUN, NULL) ?:
+ bch2_btree_delete_range(c, BTREE_ID_alloc, start, end,
+ BTREE_TRIGGER_NORUN, NULL) ?:
+ bch2_btree_delete_range(c, BTREE_ID_bucket_gens, start, end,
+ BTREE_TRIGGER_NORUN, NULL);
+ if (ret)
+ bch_err_msg(c, ret, "removing dev alloc info");
+
+ return ret;
+}
+
int bch2_dev_remove(struct bch_fs *c, struct bch_dev *ca, int flags)
{
- struct bch_sb_field_members *mi;
+ struct bch_member *m;
unsigned dev_idx = ca->dev_idx, data;
- int ret = -EINVAL;
+ int ret;
- mutex_lock(&c->state_lock);
+ down_write(&c->state_lock);
- percpu_ref_put(&ca->ref); /* XXX */
+ /*
+ * We consume a reference to ca->ref, regardless of whether we succeed
+ * or fail:
+ */
+ percpu_ref_put(&ca->ref);
- if (!bch2_dev_state_allowed(c, ca, BCH_MEMBER_STATE_FAILED, flags)) {
+ if (!bch2_dev_state_allowed(c, ca, BCH_MEMBER_STATE_failed, flags)) {
bch_err(ca, "Cannot remove without losing data");
+ ret = -BCH_ERR_device_state_not_allowed;
goto err;
}
__bch2_dev_read_only(c, ca);
- /*
- * XXX: verify that dev_idx is really not in use anymore, anywhere
- *
- * flag_data_bad() does not check btree pointers
- */
ret = bch2_dev_data_drop(c, ca->dev_idx, flags);
if (ret) {
- bch_err(ca, "Remove failed: error %i dropping data", ret);
+ bch_err_msg(ca, ret, "dropping data");
goto err;
}
- ret = bch2_journal_flush_device_pins(&c->journal, ca->dev_idx);
+ ret = bch2_dev_remove_alloc(c, ca);
if (ret) {
- bch_err(ca, "Remove failed: error %i flushing journal", ret);
+ bch_err_msg(ca, ret, "deleting alloc info");
goto err;
}
- data = bch2_dev_has_data(c, ca);
- if (data) {
- char data_has_str[100];
- bch2_scnprint_flag_list(data_has_str,
- sizeof(data_has_str),
- bch2_data_types,
- data);
- bch_err(ca, "Remove failed, still has data (%s)", data_has_str);
- ret = -EBUSY;
+ ret = bch2_journal_flush_device_pins(&c->journal, ca->dev_idx);
+ if (ret) {
+ bch_err_msg(ca, ret, "flushing journal");
goto err;
}
- ret = bch2_btree_delete_range(c, BTREE_ID_ALLOC,
- POS(ca->dev_idx, 0),
- POS(ca->dev_idx + 1, 0),
- ZERO_VERSION,
- NULL, NULL, NULL);
+ ret = bch2_journal_flush(&c->journal);
if (ret) {
- bch_err(ca, "Remove failed, error deleting alloc info");
+ bch_err(ca, "journal error");
goto err;
}
- /*
- * must flush all existing journal entries, they might have
- * (overwritten) keys that point to the device we're removing:
- */
- ret = bch2_journal_flush_all_pins(&c->journal);
+ ret = bch2_replicas_gc2(c);
if (ret) {
- bch_err(ca, "Remove failed, journal error");
+ bch_err_msg(ca, ret, "in replicas_gc2()");
+ goto err;
+ }
+
+ data = bch2_dev_has_data(c, ca);
+ if (data) {
+ struct printbuf data_has = PRINTBUF;
+
+ prt_bitflags(&data_has, bch2_data_types, data);
+ bch_err(ca, "Remove failed, still has data (%s)", data_has.buf);
+ printbuf_exit(&data_has);
+ ret = -EBUSY;
goto err;
}
bch2_dev_free(ca);
+ /*
+ * At this point the device object has been removed in-core, but the
+ * on-disk journal might still refer to the device index via sb device
+ * usage entries. Recovery fails if it sees usage information for an
+ * invalid device. Flush journal pins to push the back of the journal
+ * past now invalid device index references before we update the
+ * superblock, but after the device object has been removed so any
+ * further journal writes elide usage info for the device.
+ */
+ bch2_journal_flush_all_pins(&c->journal);
+
/*
* Free this device's slot in the bch_member array - all pointers to
* this device must be gone:
*/
mutex_lock(&c->sb_lock);
- mi = bch2_sb_get_members(c->disk_sb.sb);
- memset(&mi->members[dev_idx].uuid, 0, sizeof(mi->members[dev_idx].uuid));
+ m = bch2_members_v2_get_mut(c->disk_sb.sb, dev_idx);
+ memset(&m->uuid, 0, sizeof(m->uuid));
bch2_write_super(c);
mutex_unlock(&c->sb_lock);
- mutex_unlock(&c->state_lock);
+ up_write(&c->state_lock);
+
+ bch2_dev_usage_journal_reserve(c);
return 0;
err:
- if (ca->mi.state == BCH_MEMBER_STATE_RW)
+ if (ca->mi.state == BCH_MEMBER_STATE_rw &&
+ !percpu_ref_is_zero(&ca->io_ref))
__bch2_dev_read_write(c, ca);
- mutex_unlock(&c->state_lock);
+ up_write(&c->state_lock);
return ret;
}
{
struct bch_opts opts = bch2_opts_empty();
struct bch_sb_handle sb;
- const char *err;
struct bch_dev *ca = NULL;
- struct bch_sb_field_members *mi;
+ struct bch_sb_field_members_v2 *mi;
struct bch_member dev_mi;
unsigned dev_idx, nr_devices, u64s;
+ struct printbuf errbuf = PRINTBUF;
+ struct printbuf label = PRINTBUF;
int ret;
ret = bch2_read_super(path, &opts, &sb);
- if (ret)
- return ret;
+ if (ret) {
+ bch_err_msg(c, ret, "reading super");
+ goto err;
+ }
- err = bch2_sb_validate(&sb);
- if (err)
- return -EINVAL;
+ dev_mi = bch2_sb_member_get(sb.sb, sb.sb->dev_idx);
- dev_mi = bch2_sb_get_members(sb.sb)->members[sb.sb->dev_idx];
+ if (BCH_MEMBER_GROUP(&dev_mi)) {
+ bch2_disk_path_to_text_sb(&label, sb.sb, BCH_MEMBER_GROUP(&dev_mi) - 1);
+ if (label.allocation_failure) {
+ ret = -ENOMEM;
+ goto err;
+ }
+ }
- err = bch2_dev_may_add(sb.sb, c);
- if (err)
- return -EINVAL;
+ ret = bch2_dev_may_add(sb.sb, c);
+ if (ret) {
+ bch_err_fn(c, ret);
+ goto err;
+ }
ca = __bch2_dev_alloc(c, &dev_mi);
if (!ca) {
- bch2_free_super(&sb);
- return -ENOMEM;
+ ret = -ENOMEM;
+ goto err;
}
+ bch2_dev_usage_init(ca);
+
ret = __bch2_dev_attach_bdev(ca, &sb);
- if (ret) {
- bch2_dev_free(ca);
- return ret;
- }
+ if (ret)
+ goto err;
- err = "journal alloc failed";
ret = bch2_dev_journal_alloc(ca);
- if (ret)
+ if (ret) {
+ bch_err_msg(c, ret, "allocating journal");
goto err;
+ }
- mutex_lock(&c->state_lock);
+ down_write(&c->state_lock);
mutex_lock(&c->sb_lock);
- err = "insufficient space in new superblock";
ret = bch2_sb_from_fs(c, ca);
- if (ret)
+ if (ret) {
+ bch_err_msg(c, ret, "setting up new superblock");
goto err_unlock;
+ }
- mi = bch2_sb_get_members(ca->disk_sb.sb);
+ mi = bch2_sb_field_get(ca->disk_sb.sb, members_v2);
- if (!bch2_sb_resize_members(&ca->disk_sb,
+ if (!bch2_sb_field_resize(&ca->disk_sb, members_v2,
le32_to_cpu(mi->field.u64s) +
sizeof(dev_mi) / sizeof(u64))) {
- ret = -ENOSPC;
+ ret = -BCH_ERR_ENOSPC_sb_members;
+ bch_err_msg(c, ret, "setting up new superblock");
goto err_unlock;
}
if (dynamic_fault("bcachefs:add:no_slot"))
goto no_slot;
- mi = bch2_sb_get_members(c->disk_sb.sb);
for (dev_idx = 0; dev_idx < BCH_SB_MEMBERS_MAX; dev_idx++)
- if (!bch2_dev_exists(c->disk_sb.sb, mi, dev_idx))
+ if (!bch2_dev_exists(c->disk_sb.sb, dev_idx))
goto have_slot;
no_slot:
- err = "no slots available in superblock";
- ret = -ENOSPC;
+ ret = -BCH_ERR_ENOSPC_sb_members;
+ bch_err_msg(c, ret, "setting up new superblock");
goto err_unlock;
have_slot:
nr_devices = max_t(unsigned, dev_idx + 1, c->sb.nr_devices);
- u64s = (sizeof(struct bch_sb_field_members) +
- sizeof(struct bch_member) * nr_devices) / sizeof(u64);
+ u64s = DIV_ROUND_UP(sizeof(struct bch_sb_field_members_v2) +
+ le16_to_cpu(mi->member_bytes) * nr_devices, sizeof(u64));
- err = "no space in superblock for member info";
- ret = -ENOSPC;
-
- mi = bch2_sb_resize_members(&c->disk_sb, u64s);
- if (!mi)
+ mi = bch2_sb_field_resize(&c->disk_sb, members_v2, u64s);
+ if (!mi) {
+ ret = -BCH_ERR_ENOSPC_sb_members;
+ bch_err_msg(c, ret, "setting up new superblock");
goto err_unlock;
+ }
+ struct bch_member *m = bch2_members_v2_get_mut(c->disk_sb.sb, dev_idx);
/* success: */
- mi->members[dev_idx] = dev_mi;
- mi->members[dev_idx].last_mount = cpu_to_le64(ktime_get_seconds());
+ *m = dev_mi;
+ m->last_mount = cpu_to_le64(ktime_get_real_seconds());
c->disk_sb.sb->nr_devices = nr_devices;
ca->disk_sb.sb->dev_idx = dev_idx;
bch2_dev_attach(c, ca, dev_idx);
+ if (BCH_MEMBER_GROUP(&dev_mi)) {
+ ret = __bch2_dev_group_set(c, ca, label.buf);
+ if (ret) {
+ bch_err_msg(c, ret, "creating new label");
+ goto err_unlock;
+ }
+ }
+
bch2_write_super(c);
mutex_unlock(&c->sb_lock);
- if (ca->mi.state == BCH_MEMBER_STATE_RW) {
- err = __bch2_dev_read_write(c, ca);
- if (err)
- goto err_late;
+ bch2_dev_usage_journal_reserve(c);
+
+ ret = bch2_trans_mark_dev_sb(c, ca);
+ if (ret) {
+ bch_err_msg(ca, ret, "marking new superblock");
+ goto err_late;
+ }
+
+ ret = bch2_fs_freespace_init(c);
+ if (ret) {
+ bch_err_msg(ca, ret, "initializing free space");
+ goto err_late;
}
- mutex_unlock(&c->state_lock);
+ ca->new_fs_bucket_idx = 0;
+
+ if (ca->mi.state == BCH_MEMBER_STATE_rw)
+ __bch2_dev_read_write(c, ca);
+
+ up_write(&c->state_lock);
return 0;
err_unlock:
mutex_unlock(&c->sb_lock);
- mutex_unlock(&c->state_lock);
+ up_write(&c->state_lock);
err:
if (ca)
bch2_dev_free(ca);
bch2_free_super(&sb);
- bch_err(c, "Unable to add device: %s", err);
+ printbuf_exit(&label);
+ printbuf_exit(&errbuf);
return ret;
err_late:
- bch_err(c, "Error going rw after adding device: %s", err);
- return -EINVAL;
+ up_write(&c->state_lock);
+ ca = NULL;
+ goto err;
}
/* Hot add existing device to running filesystem: */
struct bch_sb_handle sb = { NULL };
struct bch_dev *ca;
unsigned dev_idx;
- const char *err;
int ret;
- mutex_lock(&c->state_lock);
+ down_write(&c->state_lock);
ret = bch2_read_super(path, &opts, &sb);
if (ret) {
- mutex_unlock(&c->state_lock);
+ up_write(&c->state_lock);
return ret;
}
dev_idx = sb.sb->dev_idx;
- err = bch2_dev_in_fs(c->disk_sb.sb, sb.sb);
- if (err)
+ ret = bch2_dev_in_fs(c->disk_sb.sb, sb.sb);
+ if (ret) {
+ bch_err_msg(c, ret, "bringing %s online", path);
+ goto err;
+ }
+
+ ret = bch2_dev_attach_bdev(c, &sb);
+ if (ret)
goto err;
- if (bch2_dev_attach_bdev(c, &sb)) {
- err = "bch2_dev_attach_bdev() error";
+ ca = bch_dev_locked(c, dev_idx);
+
+ ret = bch2_trans_mark_dev_sb(c, ca);
+ if (ret) {
+ bch_err_msg(c, ret, "bringing %s online: error from bch2_trans_mark_dev_sb", path);
goto err;
}
- ca = bch_dev_locked(c, dev_idx);
- if (ca->mi.state == BCH_MEMBER_STATE_RW) {
- err = __bch2_dev_read_write(c, ca);
- if (err)
+ if (ca->mi.state == BCH_MEMBER_STATE_rw)
+ __bch2_dev_read_write(c, ca);
+
+ if (!ca->mi.freespace_initialized) {
+ ret = bch2_dev_freespace_init(c, ca, 0, ca->mi.nbuckets);
+ bch_err_msg(ca, ret, "initializing free space");
+ if (ret)
+ goto err;
+ }
+
+ if (!ca->journal.nr) {
+ ret = bch2_dev_journal_alloc(ca);
+ bch_err_msg(ca, ret, "allocating journal");
+ if (ret)
goto err;
}
- mutex_unlock(&c->state_lock);
+ mutex_lock(&c->sb_lock);
+ bch2_members_v2_get_mut(c->disk_sb.sb, ca->dev_idx)->last_mount =
+ cpu_to_le64(ktime_get_real_seconds());
+ bch2_write_super(c);
+ mutex_unlock(&c->sb_lock);
+
+ up_write(&c->state_lock);
return 0;
err:
- mutex_unlock(&c->state_lock);
+ up_write(&c->state_lock);
bch2_free_super(&sb);
- bch_err(c, "error bringing %s online: %s", path, err);
- return -EINVAL;
+ return ret;
}
int bch2_dev_offline(struct bch_fs *c, struct bch_dev *ca, int flags)
{
- mutex_lock(&c->state_lock);
+ down_write(&c->state_lock);
if (!bch2_dev_is_online(ca)) {
bch_err(ca, "Already offline");
- mutex_unlock(&c->state_lock);
+ up_write(&c->state_lock);
return 0;
}
- if (!bch2_dev_state_allowed(c, ca, BCH_MEMBER_STATE_FAILED, flags)) {
+ if (!bch2_dev_state_allowed(c, ca, BCH_MEMBER_STATE_failed, flags)) {
bch_err(ca, "Cannot offline required disk");
- mutex_unlock(&c->state_lock);
- return -EINVAL;
+ up_write(&c->state_lock);
+ return -BCH_ERR_device_state_not_allowed;
}
__bch2_dev_offline(c, ca);
- mutex_unlock(&c->state_lock);
+ up_write(&c->state_lock);
return 0;
}
int bch2_dev_resize(struct bch_fs *c, struct bch_dev *ca, u64 nbuckets)
{
- struct bch_member *mi;
+ struct bch_member *m;
+ u64 old_nbuckets;
int ret = 0;
- mutex_lock(&c->state_lock);
+ down_write(&c->state_lock);
+ old_nbuckets = ca->mi.nbuckets;
if (nbuckets < ca->mi.nbuckets) {
bch_err(ca, "Cannot shrink yet");
get_capacity(ca->disk_sb.bdev->bd_disk) <
ca->mi.bucket_size * nbuckets) {
bch_err(ca, "New size larger than device");
- ret = -EINVAL;
+ ret = -BCH_ERR_device_size_too_small;
goto err;
}
ret = bch2_dev_buckets_resize(c, ca, nbuckets);
if (ret) {
- bch_err(ca, "Resize error: %i", ret);
+ bch_err_msg(ca, ret, "resizing buckets");
goto err;
}
+ ret = bch2_trans_mark_dev_sb(c, ca);
+ if (ret)
+ goto err;
+
mutex_lock(&c->sb_lock);
- mi = &bch2_sb_get_members(c->disk_sb.sb)->members[ca->dev_idx];
- mi->nbuckets = cpu_to_le64(nbuckets);
+ m = bch2_members_v2_get_mut(c->disk_sb.sb, ca->dev_idx);
+ m->nbuckets = cpu_to_le64(nbuckets);
bch2_write_super(c);
mutex_unlock(&c->sb_lock);
+ if (ca->mi.freespace_initialized) {
+ ret = bch2_dev_freespace_init(c, ca, old_nbuckets, nbuckets);
+ if (ret)
+ goto err;
+
+ /*
+ * XXX: this is all wrong transactionally - we'll be able to do
+ * this correctly after the disk space accounting rewrite
+ */
+ ca->usage_base->d[BCH_DATA_free].buckets += nbuckets - old_nbuckets;
+ }
+
bch2_recalc_capacity(c);
err:
- mutex_unlock(&c->state_lock);
+ up_write(&c->state_lock);
return ret;
}
/* return with ref on ca->ref: */
-struct bch_dev *bch2_dev_lookup(struct bch_fs *c, const char *path)
+struct bch_dev *bch2_dev_lookup(struct bch_fs *c, const char *name)
{
-
- struct block_device *bdev = lookup_bdev(path);
struct bch_dev *ca;
unsigned i;
- if (IS_ERR(bdev))
- return ERR_CAST(bdev);
-
- for_each_member_device(ca, c, i)
- if (ca->disk_sb.bdev == bdev)
+ rcu_read_lock();
+ for_each_member_device_rcu(ca, c, i, NULL)
+ if (!strcmp(name, ca->name))
goto found;
-
- ca = ERR_PTR(-ENOENT);
+ ca = ERR_PTR(-BCH_ERR_ENOENT_dev_not_found);
found:
- bdput(bdev);
+ rcu_read_unlock();
+
return ca;
}
struct bch_sb_handle *sb = NULL;
struct bch_fs *c = NULL;
unsigned i, best_sb = 0;
- const char *err;
- int ret = -ENOMEM;
+ struct printbuf errbuf = PRINTBUF;
+ int ret = 0;
- pr_verbose_init(opts, "");
+ if (!try_module_get(THIS_MODULE))
+ return ERR_PTR(-ENODEV);
if (!nr_devices) {
- c = ERR_PTR(-EINVAL);
- goto out2;
- }
-
- if (!try_module_get(THIS_MODULE)) {
- c = ERR_PTR(-ENODEV);
- goto out2;
+ ret = -EINVAL;
+ goto err;
}
sb = kcalloc(nr_devices, sizeof(*sb), GFP_KERNEL);
- if (!sb)
+ if (!sb) {
+ ret = -ENOMEM;
goto err;
+ }
for (i = 0; i < nr_devices; i++) {
ret = bch2_read_super(devices[i], &opts, &sb[i]);
if (ret)
goto err;
- err = bch2_sb_validate(&sb[i]);
- if (err)
- goto err_print;
}
for (i = 1; i < nr_devices; i++)
le64_to_cpu(sb[best_sb].sb->seq))
best_sb = i;
- for (i = 0; i < nr_devices; i++) {
- err = bch2_dev_in_fs(sb[best_sb].sb, sb[i].sb);
- if (err)
+ i = 0;
+ while (i < nr_devices) {
+ if (i != best_sb &&
+ !bch2_dev_exists(sb[best_sb].sb, sb[i].sb->dev_idx)) {
+ pr_info("%pg has been removed, skipping", sb[i].bdev);
+ bch2_free_super(&sb[i]);
+ array_remove_item(sb, nr_devices, i);
+ continue;
+ }
+
+ ret = bch2_dev_in_fs(sb[best_sb].sb, sb[i].sb);
+ if (ret)
goto err_print;
+ i++;
}
- ret = -ENOMEM;
c = bch2_fs_alloc(sb[best_sb].sb, opts);
- if (!c)
+ if (IS_ERR(c)) {
+ ret = PTR_ERR(c);
goto err;
+ }
- err = "bch2_dev_online() error";
- mutex_lock(&c->state_lock);
- for (i = 0; i < nr_devices; i++)
- if (bch2_dev_attach_bdev(c, &sb[i])) {
- mutex_unlock(&c->state_lock);
- goto err_print;
+ down_write(&c->state_lock);
+ for (i = 0; i < nr_devices; i++) {
+ ret = bch2_dev_attach_bdev(c, &sb[i]);
+ if (ret) {
+ up_write(&c->state_lock);
+ goto err;
}
- mutex_unlock(&c->state_lock);
+ }
+ up_write(&c->state_lock);
- err = "insufficient devices";
- if (!bch2_fs_may_start(c))
+ if (!bch2_fs_may_start(c)) {
+ ret = -BCH_ERR_insufficient_devices_to_start;
goto err_print;
+ }
if (!c->opts.nostart) {
- err = bch2_fs_start(c);
- if (err)
- goto err_print;
+ ret = bch2_fs_start(c);
+ if (ret)
+ goto err;
}
out:
kfree(sb);
+ printbuf_exit(&errbuf);
module_put(THIS_MODULE);
-out2:
- pr_verbose_init(opts, "ret %i", PTR_ERR_OR_ZERO(c));
return c;
err_print:
pr_err("bch_fs_open err opening %s: %s",
- devices[0], err);
- ret = -EINVAL;
+ devices[0], bch2_err_str(ret));
err:
- if (c)
+ if (!IS_ERR_OR_NULL(c))
bch2_fs_stop(c);
- for (i = 0; i < nr_devices; i++)
- bch2_free_super(&sb[i]);
+ if (sb)
+ for (i = 0; i < nr_devices; i++)
+ bch2_free_super(&sb[i]);
c = ERR_PTR(ret);
goto out;
}
-static const char *__bch2_fs_open_incremental(struct bch_sb_handle *sb,
- struct bch_opts opts)
-{
- const char *err;
- struct bch_fs *c;
- bool allocated_fs = false;
-
- err = bch2_sb_validate(sb);
- if (err)
- return err;
-
- mutex_lock(&bch_fs_list_lock);
- c = __bch2_uuid_to_fs(sb->sb->uuid);
- if (c) {
- closure_get(&c->cl);
-
- err = bch2_dev_in_fs(c->disk_sb.sb, sb->sb);
- if (err)
- goto err;
- } else {
- c = bch2_fs_alloc(sb->sb, opts);
- err = "cannot allocate memory";
- if (!c)
- goto err;
-
- allocated_fs = true;
- }
-
- err = "bch2_dev_online() error";
-
- mutex_lock(&c->sb_lock);
- if (bch2_dev_attach_bdev(c, sb)) {
- mutex_unlock(&c->sb_lock);
- goto err;
- }
- mutex_unlock(&c->sb_lock);
-
- if (!c->opts.nostart && bch2_fs_may_start(c)) {
- err = bch2_fs_start(c);
- if (err)
- goto err;
- }
-
- closure_put(&c->cl);
- mutex_unlock(&bch_fs_list_lock);
-
- return NULL;
-err:
- mutex_unlock(&bch_fs_list_lock);
-
- if (allocated_fs)
- bch2_fs_stop(c);
- else if (c)
- closure_put(&c->cl);
-
- return err;
-}
-
-const char *bch2_fs_open_incremental(const char *path)
-{
- struct bch_sb_handle sb;
- struct bch_opts opts = bch2_opts_empty();
- const char *err;
-
- if (bch2_read_super(path, &opts, &sb))
- return "error reading superblock";
-
- err = __bch2_fs_open_incremental(&sb, opts);
- bch2_free_super(&sb);
-
- return err;
-}
-
/* Global interfaces/init */
static void bcachefs_exit(void)
bch2_debug_exit();
bch2_vfs_exit();
bch2_chardev_exit();
+ bch2_btree_key_cache_exit();
if (bcachefs_kset)
kset_unregister(bcachefs_kset);
}
static int __init bcachefs_init(void)
{
bch2_bkey_pack_test();
- bch2_inode_pack_test();
if (!(bcachefs_kset = kset_create_and_add("bcachefs", NULL, fs_kobj)) ||
+ bch2_btree_key_cache_init() ||
bch2_chardev_init() ||
bch2_vfs_init() ||
bch2_debug_init())
BCH_DEBUG_PARAMS()
#undef BCH_DEBUG_PARAM
+__maybe_unused
+static unsigned bch2_metadata_version = bcachefs_metadata_version_current;
+module_param_named(version, bch2_metadata_version, uint, 0400);
+
module_exit(bcachefs_exit);
module_init(bcachefs_init);