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73e6ab9564
Prep work for upcoming disk accounting changes Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
1810 lines
41 KiB
C
1810 lines
41 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* bcachefs setup/teardown code, and some metadata io - read a superblock and
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* figure out what to do with it.
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*
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* Copyright 2010, 2011 Kent Overstreet <kent.overstreet@gmail.com>
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* Copyright 2012 Google, Inc.
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*/
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#include "bcachefs.h"
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#include "alloc_background.h"
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#include "alloc_foreground.h"
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#include "bkey_sort.h"
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#include "btree_cache.h"
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#include "btree_gc.h"
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#include "btree_update_interior.h"
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#include "btree_io.h"
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#include "chardev.h"
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#include "checksum.h"
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#include "clock.h"
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#include "compress.h"
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#include "debug.h"
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#include "disk_groups.h"
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#include "ec.h"
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#include "error.h"
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#include "fs.h"
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#include "fs-io.h"
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#include "fsck.h"
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#include "inode.h"
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#include "io.h"
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#include "journal.h"
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#include "journal_reclaim.h"
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#include "move.h"
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#include "migrate.h"
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#include "movinggc.h"
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#include "quota.h"
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#include "rebalance.h"
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#include "recovery.h"
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#include "replicas.h"
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#include "super.h"
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#include "super-io.h"
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#include "sysfs.h"
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#include "trace.h"
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#include <linux/backing-dev.h>
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#include <linux/blkdev.h>
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#include <linux/debugfs.h>
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#include <linux/device.h>
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#include <linux/idr.h>
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#include <linux/kthread.h>
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#include <linux/module.h>
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#include <linux/percpu.h>
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#include <linux/random.h>
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#include <linux/sysfs.h>
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#include <crypto/hash.h>
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Kent Overstreet <kent.overstreet@gmail.com>");
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#define KTYPE(type) \
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static const struct attribute_group type ## _group = { \
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.attrs = type ## _files \
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}; \
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\
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static const struct attribute_group *type ## _groups[] = { \
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&type ## _group, \
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NULL \
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}; \
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\
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static const struct kobj_type type ## _ktype = { \
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.release = type ## _release, \
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.sysfs_ops = &type ## _sysfs_ops, \
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.default_groups = type ## _groups \
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}
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static void bch2_fs_release(struct kobject *);
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static void bch2_dev_release(struct kobject *);
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static void bch2_fs_internal_release(struct kobject *k)
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{
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}
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static void bch2_fs_opts_dir_release(struct kobject *k)
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{
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}
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static void bch2_fs_time_stats_release(struct kobject *k)
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{
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}
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KTYPE(bch2_fs);
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KTYPE(bch2_fs_internal);
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KTYPE(bch2_fs_opts_dir);
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KTYPE(bch2_fs_time_stats);
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KTYPE(bch2_dev);
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static struct kset *bcachefs_kset;
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static LIST_HEAD(bch_fs_list);
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static DEFINE_MUTEX(bch_fs_list_lock);
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static DECLARE_WAIT_QUEUE_HEAD(bch_read_only_wait);
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static void bch2_dev_free(struct bch_dev *);
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static int bch2_dev_alloc(struct bch_fs *, unsigned);
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static int bch2_dev_sysfs_online(struct bch_fs *, struct bch_dev *);
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static void __bch2_dev_read_only(struct bch_fs *, struct bch_dev *);
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struct bch_fs *bch2_dev_to_fs(dev_t dev)
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{
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struct bch_fs *c;
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struct bch_dev *ca;
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unsigned i;
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mutex_lock(&bch_fs_list_lock);
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rcu_read_lock();
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list_for_each_entry(c, &bch_fs_list, list)
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for_each_member_device_rcu(ca, c, i, NULL)
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if (ca->disk_sb.bdev->bd_dev == dev) {
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closure_get(&c->cl);
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goto found;
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}
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c = NULL;
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found:
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rcu_read_unlock();
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mutex_unlock(&bch_fs_list_lock);
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return c;
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}
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static struct bch_fs *__bch2_uuid_to_fs(__uuid_t uuid)
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{
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struct bch_fs *c;
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lockdep_assert_held(&bch_fs_list_lock);
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list_for_each_entry(c, &bch_fs_list, list)
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if (!memcmp(&c->disk_sb.sb->uuid, &uuid, sizeof(uuid)))
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return c;
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return NULL;
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}
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struct bch_fs *bch2_uuid_to_fs(__uuid_t uuid)
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{
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struct bch_fs *c;
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mutex_lock(&bch_fs_list_lock);
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c = __bch2_uuid_to_fs(uuid);
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if (c)
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closure_get(&c->cl);
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mutex_unlock(&bch_fs_list_lock);
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return c;
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}
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/* Filesystem RO/RW: */
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/*
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* For startup/shutdown of RW stuff, the dependencies are:
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*
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* - foreground writes depend on copygc and rebalance (to free up space)
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*
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* - copygc and rebalance depend on mark and sweep gc (they actually probably
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* don't because they either reserve ahead of time or don't block if
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* allocations fail, but allocations can require mark and sweep gc to run
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* because of generation number wraparound)
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*
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* - all of the above depends on the allocator threads
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*
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* - allocator depends on the journal (when it rewrites prios and gens)
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*/
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static void __bch2_fs_read_only(struct bch_fs *c)
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{
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struct bch_dev *ca;
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unsigned i;
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bch2_rebalance_stop(c);
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for_each_member_device(ca, c, i)
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bch2_copygc_stop(ca);
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bch2_gc_thread_stop(c);
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/*
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* Flush journal before stopping allocators, because flushing journal
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* blacklist entries involves allocating new btree nodes:
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*/
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bch2_journal_flush_all_pins(&c->journal);
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for_each_member_device(ca, c, i)
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bch2_dev_allocator_stop(ca);
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bch2_journal_flush_all_pins(&c->journal);
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/*
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* We need to explicitly wait on btree interior updates to complete
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* before stopping the journal, flushing all journal pins isn't
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* sufficient, because in the BTREE_INTERIOR_UPDATING_ROOT case btree
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* interior updates have to drop their journal pin before they're
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* fully complete:
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*/
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closure_wait_event(&c->btree_interior_update_wait,
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!bch2_btree_interior_updates_nr_pending(c));
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bch2_fs_journal_stop(&c->journal);
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/*
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* the journal kicks off btree writes via reclaim - wait for in flight
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* writes after stopping journal:
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*/
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if (test_bit(BCH_FS_EMERGENCY_RO, &c->flags))
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bch2_btree_flush_all_writes(c);
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else
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bch2_btree_verify_flushed(c);
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/*
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* After stopping journal:
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*/
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for_each_member_device(ca, c, i)
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bch2_dev_allocator_remove(c, ca);
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}
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static void bch2_writes_disabled(struct percpu_ref *writes)
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{
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struct bch_fs *c = container_of(writes, struct bch_fs, writes);
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set_bit(BCH_FS_WRITE_DISABLE_COMPLETE, &c->flags);
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wake_up(&bch_read_only_wait);
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}
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void bch2_fs_read_only(struct bch_fs *c)
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{
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if (c->state == BCH_FS_RO)
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return;
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BUG_ON(test_bit(BCH_FS_WRITE_DISABLE_COMPLETE, &c->flags));
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/*
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* Block new foreground-end write operations from starting - any new
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* writes will return -EROFS:
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*
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* (This is really blocking new _allocations_, writes to previously
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* allocated space can still happen until stopping the allocator in
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* bch2_dev_allocator_stop()).
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*/
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percpu_ref_kill(&c->writes);
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cancel_delayed_work(&c->pd_controllers_update);
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/*
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* If we're not doing an emergency shutdown, we want to wait on
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* outstanding writes to complete so they don't see spurious errors due
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* to shutting down the allocator:
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*
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* If we are doing an emergency shutdown outstanding writes may
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* hang until we shutdown the allocator so we don't want to wait
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* on outstanding writes before shutting everything down - but
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* we do need to wait on them before returning and signalling
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* that going RO is complete:
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*/
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wait_event(bch_read_only_wait,
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test_bit(BCH_FS_WRITE_DISABLE_COMPLETE, &c->flags) ||
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test_bit(BCH_FS_EMERGENCY_RO, &c->flags));
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__bch2_fs_read_only(c);
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wait_event(bch_read_only_wait,
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test_bit(BCH_FS_WRITE_DISABLE_COMPLETE, &c->flags));
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clear_bit(BCH_FS_WRITE_DISABLE_COMPLETE, &c->flags);
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if (!bch2_journal_error(&c->journal) &&
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!test_bit(BCH_FS_ERROR, &c->flags) &&
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!test_bit(BCH_FS_EMERGENCY_RO, &c->flags))
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bch2_fs_mark_clean(c, true);
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if (c->state != BCH_FS_STOPPING)
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c->state = BCH_FS_RO;
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}
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static void bch2_fs_read_only_work(struct work_struct *work)
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{
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struct bch_fs *c =
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container_of(work, struct bch_fs, read_only_work);
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mutex_lock(&c->state_lock);
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bch2_fs_read_only(c);
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mutex_unlock(&c->state_lock);
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}
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static void bch2_fs_read_only_async(struct bch_fs *c)
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{
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queue_work(system_long_wq, &c->read_only_work);
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}
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bool bch2_fs_emergency_read_only(struct bch_fs *c)
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{
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bool ret = !test_and_set_bit(BCH_FS_EMERGENCY_RO, &c->flags);
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bch2_fs_read_only_async(c);
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bch2_journal_halt(&c->journal);
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wake_up(&bch_read_only_wait);
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return ret;
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}
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const char *bch2_fs_read_write(struct bch_fs *c)
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{
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struct bch_dev *ca;
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const char *err = NULL;
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unsigned i;
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if (c->state == BCH_FS_RW)
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return NULL;
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bch2_fs_mark_clean(c, false);
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for_each_rw_member(ca, c, i)
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bch2_dev_allocator_add(c, ca);
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bch2_recalc_capacity(c);
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err = "error starting allocator thread";
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for_each_rw_member(ca, c, i)
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if (bch2_dev_allocator_start(ca)) {
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percpu_ref_put(&ca->io_ref);
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goto err;
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}
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err = "error starting btree GC thread";
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if (bch2_gc_thread_start(c))
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goto err;
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err = "error starting copygc thread";
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for_each_rw_member(ca, c, i)
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if (bch2_copygc_start(c, ca)) {
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percpu_ref_put(&ca->io_ref);
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goto err;
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}
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err = "error starting rebalance thread";
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if (bch2_rebalance_start(c))
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goto err;
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schedule_delayed_work(&c->pd_controllers_update, 5 * HZ);
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if (c->state != BCH_FS_STARTING)
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percpu_ref_reinit(&c->writes);
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c->state = BCH_FS_RW;
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return NULL;
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err:
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__bch2_fs_read_only(c);
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return err;
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}
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/* Filesystem startup/shutdown: */
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static void bch2_fs_free(struct bch_fs *c)
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{
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unsigned i;
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for (i = 0; i < BCH_TIME_STAT_NR; i++)
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bch2_time_stats_exit(&c->times[i]);
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bch2_fs_quota_exit(c);
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bch2_fs_fsio_exit(c);
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bch2_fs_ec_exit(c);
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bch2_fs_encryption_exit(c);
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bch2_fs_io_exit(c);
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bch2_fs_btree_cache_exit(c);
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bch2_fs_journal_exit(&c->journal);
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bch2_io_clock_exit(&c->io_clock[WRITE]);
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bch2_io_clock_exit(&c->io_clock[READ]);
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bch2_fs_compress_exit(c);
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percpu_free_rwsem(&c->mark_lock);
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free_percpu(c->usage[0]);
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mempool_exit(&c->btree_iters_pool);
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mempool_exit(&c->btree_bounce_pool);
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bioset_exit(&c->btree_bio);
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mempool_exit(&c->btree_interior_update_pool);
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mempool_exit(&c->btree_reserve_pool);
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mempool_exit(&c->fill_iter);
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percpu_ref_exit(&c->writes);
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kfree(c->replicas.entries);
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kfree(c->replicas_gc.entries);
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kfree(rcu_dereference_protected(c->disk_groups, 1));
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if (c->copygc_wq)
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destroy_workqueue(c->copygc_wq);
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if (c->wq)
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destroy_workqueue(c->wq);
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free_pages((unsigned long) c->disk_sb.sb,
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c->disk_sb.page_order);
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kvpfree(c, sizeof(*c));
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module_put(THIS_MODULE);
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}
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static void bch2_fs_release(struct kobject *kobj)
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{
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struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
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bch2_fs_free(c);
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}
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void bch2_fs_stop(struct bch_fs *c)
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{
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struct bch_dev *ca;
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unsigned i;
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bch_verbose(c, "shutting down");
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for_each_member_device(ca, c, i)
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if (ca->kobj.state_in_sysfs &&
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ca->disk_sb.bdev)
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sysfs_remove_link(bdev_kobj(ca->disk_sb.bdev), "bcachefs");
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if (c->kobj.state_in_sysfs)
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kobject_del(&c->kobj);
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bch2_fs_debug_exit(c);
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bch2_fs_chardev_exit(c);
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kobject_put(&c->time_stats);
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kobject_put(&c->opts_dir);
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kobject_put(&c->internal);
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mutex_lock(&bch_fs_list_lock);
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list_del(&c->list);
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mutex_unlock(&bch_fs_list_lock);
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closure_sync(&c->cl);
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closure_debug_destroy(&c->cl);
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|
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mutex_lock(&c->state_lock);
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bch2_fs_read_only(c);
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mutex_unlock(&c->state_lock);
|
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/* btree prefetch might have kicked off reads in the background: */
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bch2_btree_flush_all_reads(c);
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for_each_member_device(ca, c, i)
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cancel_work_sync(&ca->io_error_work);
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|
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cancel_work_sync(&c->btree_write_error_work);
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cancel_delayed_work_sync(&c->pd_controllers_update);
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cancel_work_sync(&c->read_only_work);
|
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|
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for (i = 0; i < c->sb.nr_devices; i++)
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if (c->devs[i])
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bch2_dev_free(rcu_dereference_protected(c->devs[i], 1));
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bch_verbose(c, "shutdown complete");
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|
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kobject_put(&c->kobj);
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}
|
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|
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static const char *bch2_fs_online(struct bch_fs *c)
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{
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struct bch_dev *ca;
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const char *err = NULL;
|
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unsigned i;
|
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int ret;
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|
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lockdep_assert_held(&bch_fs_list_lock);
|
|
|
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if (!list_empty(&c->list))
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return NULL;
|
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|
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if (__bch2_uuid_to_fs(c->sb.uuid))
|
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return "filesystem UUID already open";
|
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|
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ret = bch2_fs_chardev_init(c);
|
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if (ret)
|
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return "error creating character device";
|
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|
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bch2_fs_debug_init(c);
|
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|
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if (kobject_add(&c->kobj, NULL, "%pU", c->sb.user_uuid.b) ||
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kobject_add(&c->internal, &c->kobj, "internal") ||
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kobject_add(&c->opts_dir, &c->kobj, "options") ||
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kobject_add(&c->time_stats, &c->kobj, "time_stats") ||
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bch2_opts_create_sysfs_files(&c->opts_dir))
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return "error creating sysfs objects";
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|
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mutex_lock(&c->state_lock);
|
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|
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err = "error creating sysfs objects";
|
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__for_each_member_device(ca, c, i, NULL)
|
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if (bch2_dev_sysfs_online(c, ca))
|
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goto err;
|
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|
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list_add(&c->list, &bch_fs_list);
|
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err = NULL;
|
|
err:
|
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mutex_unlock(&c->state_lock);
|
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return err;
|
|
}
|
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|
|
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;
|
|
unsigned i, iter_size;
|
|
const char *err;
|
|
|
|
pr_verbose_init(opts, "");
|
|
|
|
c = kvpmalloc(sizeof(struct bch_fs), GFP_KERNEL|__GFP_ZERO);
|
|
if (!c)
|
|
goto out;
|
|
|
|
__module_get(THIS_MODULE);
|
|
|
|
c->minor = -1;
|
|
c->disk_sb.fs_sb = true;
|
|
|
|
mutex_init(&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);
|
|
|
|
for (i = 0; i < BCH_TIME_STAT_NR; i++)
|
|
bch2_time_stats_init(&c->times[i]);
|
|
|
|
bch2_fs_allocator_background_init(c);
|
|
bch2_fs_allocator_foreground_init(c);
|
|
bch2_fs_rebalance_init(c);
|
|
bch2_fs_quota_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->bio_bounce_pages_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_LIST_HEAD(&c->fsck_errors);
|
|
mutex_init(&c->fsck_error_lock);
|
|
|
|
INIT_LIST_HEAD(&c->ec_new_stripe_list);
|
|
mutex_init(&c->ec_new_stripe_lock);
|
|
mutex_init(&c->ec_stripe_create_lock);
|
|
spin_lock_init(&c->ec_stripes_heap_lock);
|
|
|
|
seqcount_init(&c->gc_pos_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];
|
|
|
|
bch2_fs_btree_cache_init_early(&c->btree_cache);
|
|
|
|
if (percpu_init_rwsem(&c->mark_lock))
|
|
goto err;
|
|
|
|
mutex_lock(&c->sb_lock);
|
|
|
|
if (bch2_sb_to_fs(c, sb)) {
|
|
mutex_unlock(&c->sb_lock);
|
|
goto err;
|
|
}
|
|
|
|
mutex_unlock(&c->sb_lock);
|
|
|
|
scnprintf(c->name, sizeof(c->name), "%pU", &c->sb.user_uuid);
|
|
|
|
c->opts = bch2_opts_default;
|
|
bch2_opts_apply(&c->opts, bch2_opts_from_sb(sb));
|
|
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->opts.nochanges |= c->opts.noreplay;
|
|
c->opts.read_only |= c->opts.nochanges;
|
|
|
|
if (bch2_fs_init_fault("fs_alloc"))
|
|
goto err;
|
|
|
|
iter_size = sizeof(struct btree_node_iter_large) +
|
|
(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)) ||
|
|
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[0] = alloc_percpu(struct bch_fs_usage)) ||
|
|
mempool_init_kvpmalloc_pool(&c->btree_bounce_pool, 1,
|
|
btree_bytes(c)) ||
|
|
mempool_init_kmalloc_pool(&c->btree_iters_pool, 1,
|
|
sizeof(struct btree_iter) * BTREE_ITER_MAX) ||
|
|
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_ec_init(c) ||
|
|
bch2_fs_fsio_init(c))
|
|
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))
|
|
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);
|
|
|
|
mutex_lock(&bch_fs_list_lock);
|
|
err = bch2_fs_online(c);
|
|
mutex_unlock(&bch_fs_list_lock);
|
|
if (err) {
|
|
bch_err(c, "bch2_fs_online() error: %s", err);
|
|
goto err;
|
|
}
|
|
out:
|
|
pr_verbose_init(opts, "ret %i", c ? 0 : -ENOMEM);
|
|
return c;
|
|
err:
|
|
bch2_fs_free(c);
|
|
c = NULL;
|
|
goto out;
|
|
}
|
|
|
|
const char *bch2_fs_start(struct bch_fs *c)
|
|
{
|
|
const char *err = "cannot allocate memory";
|
|
struct bch_sb_field_members *mi;
|
|
struct bch_dev *ca;
|
|
time64_t now = ktime_get_real_seconds();
|
|
unsigned i;
|
|
int ret = -EINVAL;
|
|
|
|
mutex_lock(&c->state_lock);
|
|
|
|
BUG_ON(c->state != BCH_FS_STARTING);
|
|
|
|
mutex_lock(&c->sb_lock);
|
|
|
|
for_each_online_member(ca, c, i)
|
|
bch2_sb_from_fs(c, ca);
|
|
|
|
mi = bch2_sb_get_members(c->disk_sb.sb);
|
|
for_each_online_member(ca, c, i)
|
|
mi->members[ca->dev_idx].last_mount = cpu_to_le64(now);
|
|
|
|
mutex_unlock(&c->sb_lock);
|
|
|
|
for_each_rw_member(ca, c, i)
|
|
bch2_dev_allocator_add(c, ca);
|
|
bch2_recalc_capacity(c);
|
|
|
|
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;
|
|
|
|
err = "dynamic fault";
|
|
if (bch2_fs_init_fault("fs_start"))
|
|
goto err;
|
|
|
|
if (c->opts.read_only) {
|
|
bch2_fs_read_only(c);
|
|
} else {
|
|
err = bch2_fs_read_write(c);
|
|
if (err)
|
|
goto err;
|
|
}
|
|
|
|
set_bit(BCH_FS_STARTED, &c->flags);
|
|
|
|
err = NULL;
|
|
out:
|
|
mutex_unlock(&c->state_lock);
|
|
return err;
|
|
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);
|
|
goto out;
|
|
}
|
|
|
|
static const char *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";
|
|
|
|
if (le16_to_cpu(sb->block_size) != c->opts.block_size)
|
|
return "mismatched block size";
|
|
|
|
if (le16_to_cpu(sb_mi->members[sb->dev_idx].bucket_size) <
|
|
BCH_SB_BTREE_NODE_SIZE(c->disk_sb.sb))
|
|
return "new cache bucket size is too small";
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static const char *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_equal(&fs->uuid, &sb->uuid))
|
|
return "device not a member of filesystem";
|
|
|
|
if (!bch2_dev_exists(newest, mi, sb->dev_idx))
|
|
return "device has been removed";
|
|
|
|
if (fs->block_size != sb->block_size)
|
|
return "mismatched block size";
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/* Device startup/shutdown: */
|
|
|
|
static void bch2_dev_release(struct kobject *kobj)
|
|
{
|
|
struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj);
|
|
|
|
kfree(ca);
|
|
}
|
|
|
|
static void bch2_dev_free(struct bch_dev *ca)
|
|
{
|
|
cancel_work_sync(&ca->io_error_work);
|
|
|
|
if (ca->kobj.state_in_sysfs &&
|
|
ca->disk_sb.bdev)
|
|
sysfs_remove_link(bdev_kobj(ca->disk_sb.bdev), "bcachefs");
|
|
|
|
if (ca->kobj.state_in_sysfs)
|
|
kobject_del(&ca->kobj);
|
|
|
|
bch2_free_super(&ca->disk_sb);
|
|
bch2_dev_journal_exit(ca);
|
|
|
|
free_percpu(ca->io_done);
|
|
bioset_exit(&ca->replica_set);
|
|
bch2_dev_buckets_free(ca);
|
|
|
|
bch2_time_stats_exit(&ca->io_latency[WRITE]);
|
|
bch2_time_stats_exit(&ca->io_latency[READ]);
|
|
|
|
percpu_ref_exit(&ca->io_ref);
|
|
percpu_ref_exit(&ca->ref);
|
|
kobject_put(&ca->kobj);
|
|
}
|
|
|
|
static void __bch2_dev_offline(struct bch_fs *c, struct bch_dev *ca)
|
|
{
|
|
|
|
lockdep_assert_held(&c->state_lock);
|
|
|
|
if (percpu_ref_is_zero(&ca->io_ref))
|
|
return;
|
|
|
|
__bch2_dev_read_only(c, ca);
|
|
|
|
reinit_completion(&ca->io_ref_completion);
|
|
percpu_ref_kill(&ca->io_ref);
|
|
wait_for_completion(&ca->io_ref_completion);
|
|
|
|
if (ca->kobj.state_in_sysfs) {
|
|
sysfs_remove_link(bdev_kobj(ca->disk_sb.bdev), "bcachefs");
|
|
sysfs_remove_link(&ca->kobj, "block");
|
|
}
|
|
|
|
bch2_free_super(&ca->disk_sb);
|
|
bch2_dev_journal_exit(ca);
|
|
}
|
|
|
|
static void bch2_dev_ref_complete(struct percpu_ref *ref)
|
|
{
|
|
struct bch_dev *ca = container_of(ref, struct bch_dev, ref);
|
|
|
|
complete(&ca->ref_completion);
|
|
}
|
|
|
|
static void bch2_dev_io_ref_complete(struct percpu_ref *ref)
|
|
{
|
|
struct bch_dev *ca = container_of(ref, struct bch_dev, io_ref);
|
|
|
|
complete(&ca->io_ref_completion);
|
|
}
|
|
|
|
static int bch2_dev_sysfs_online(struct bch_fs *c, struct bch_dev *ca)
|
|
{
|
|
int ret;
|
|
|
|
if (!c->kobj.state_in_sysfs)
|
|
return 0;
|
|
|
|
if (!ca->kobj.state_in_sysfs) {
|
|
ret = kobject_add(&ca->kobj, &c->kobj,
|
|
"dev-%u", ca->dev_idx);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
if (ca->disk_sb.bdev) {
|
|
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;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct bch_dev *__bch2_dev_alloc(struct bch_fs *c,
|
|
struct bch_member *member)
|
|
{
|
|
struct bch_dev *ca;
|
|
|
|
ca = kzalloc(sizeof(*ca), GFP_KERNEL);
|
|
if (!ca)
|
|
return NULL;
|
|
|
|
kobject_init(&ca->kobj, &bch2_dev_ktype);
|
|
init_completion(&ca->ref_completion);
|
|
init_completion(&ca->io_ref_completion);
|
|
|
|
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]);
|
|
bch2_time_stats_init(&ca->io_latency[WRITE]);
|
|
|
|
ca->mi = bch2_mi_to_cpu(member);
|
|
ca->uuid = member->uuid;
|
|
|
|
if (opt_defined(c->opts, discard))
|
|
ca->mi.discard = opt_get(c->opts, discard);
|
|
|
|
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) ||
|
|
bch2_dev_buckets_alloc(c, ca) ||
|
|
bioset_init(&ca->replica_set, 4,
|
|
offsetof(struct bch_write_bio, bio), 0) ||
|
|
!(ca->io_done = alloc_percpu(*ca->io_done)))
|
|
goto err;
|
|
|
|
return ca;
|
|
err:
|
|
bch2_dev_free(ca);
|
|
return NULL;
|
|
}
|
|
|
|
static void bch2_dev_attach(struct bch_fs *c, struct bch_dev *ca,
|
|
unsigned dev_idx)
|
|
{
|
|
ca->dev_idx = dev_idx;
|
|
__set_bit(ca->dev_idx, ca->self.d);
|
|
scnprintf(ca->name, sizeof(ca->name), "dev-%u", dev_idx);
|
|
|
|
ca->fs = c;
|
|
rcu_assign_pointer(c->devs[ca->dev_idx], ca);
|
|
|
|
if (bch2_dev_sysfs_online(c, ca))
|
|
pr_warn("error creating sysfs objects");
|
|
}
|
|
|
|
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_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);
|
|
if (!ca)
|
|
goto err;
|
|
|
|
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;
|
|
}
|
|
|
|
static int __bch2_dev_attach_bdev(struct bch_dev *ca, struct bch_sb_handle *sb)
|
|
{
|
|
unsigned ret;
|
|
|
|
if (bch2_dev_is_online(ca)) {
|
|
bch_err(ca, "already have device online in slot %u",
|
|
sb->sb->dev_idx);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (get_capacity(sb->bdev->bd_disk) <
|
|
ca->mi.bucket_size * ca->mi.nbuckets) {
|
|
bch_err(ca, "cannot online: device too small");
|
|
return -EINVAL;
|
|
}
|
|
|
|
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;
|
|
memset(sb, 0, sizeof(*sb));
|
|
|
|
percpu_ref_reinit(&ca->io_ref);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int bch2_dev_attach_bdev(struct bch_fs *c, struct bch_sb_handle *sb)
|
|
{
|
|
struct bch_dev *ca;
|
|
int ret;
|
|
|
|
lockdep_assert_held(&c->state_lock);
|
|
|
|
if (le64_to_cpu(sb->sb->seq) >
|
|
le64_to_cpu(c->disk_sb.sb->seq))
|
|
bch2_sb_to_fs(c, sb->sb);
|
|
|
|
BUG_ON(sb->sb->dev_idx >= c->sb.nr_devices ||
|
|
!c->devs[sb->sb->dev_idx]);
|
|
|
|
ca = bch_dev_locked(c, sb->sb->dev_idx);
|
|
|
|
ret = __bch2_dev_attach_bdev(ca, sb);
|
|
if (ret)
|
|
return ret;
|
|
|
|
mutex_lock(&c->sb_lock);
|
|
bch2_mark_dev_superblock(ca->fs, ca, 0);
|
|
mutex_unlock(&c->sb_lock);
|
|
|
|
bch2_dev_sysfs_online(c, ca);
|
|
|
|
if (c->sb.nr_devices == 1)
|
|
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;
|
|
}
|
|
|
|
/* Device management: */
|
|
|
|
/*
|
|
* Note: this function is also used by the error paths - when a particular
|
|
* device sees an error, we call it to determine whether we can just set the
|
|
* device RO, or - if this function returns false - we'll set the whole
|
|
* filesystem RO:
|
|
*
|
|
* XXX: maybe we should be more explicit about whether we're changing state
|
|
* because we got an error or what have you?
|
|
*/
|
|
bool bch2_dev_state_allowed(struct bch_fs *c, struct bch_dev *ca,
|
|
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:
|
|
return true;
|
|
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;
|
|
|
|
required = max(!(flags & BCH_FORCE_IF_METADATA_DEGRADED)
|
|
? c->opts.metadata_replicas
|
|
: c->opts.metadata_replicas_required,
|
|
!(flags & BCH_FORCE_IF_DATA_DEGRADED)
|
|
? c->opts.data_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)
|
|
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);
|
|
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;
|
|
|
|
if (!c->opts.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))
|
|
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)) {
|
|
mutex_unlock(&c->sb_lock);
|
|
return false;
|
|
}
|
|
}
|
|
mutex_unlock(&c->sb_lock);
|
|
}
|
|
|
|
s = bch2_replicas_status(c);
|
|
|
|
return bch2_have_enough_devs(s, flags);
|
|
}
|
|
|
|
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)
|
|
{
|
|
lockdep_assert_held(&c->state_lock);
|
|
|
|
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;
|
|
int ret = 0;
|
|
|
|
if (ca->mi.state == new_state)
|
|
return 0;
|
|
|
|
if (!bch2_dev_state_allowed(c, ca, new_state, flags))
|
|
return -EINVAL;
|
|
|
|
if (new_state != BCH_MEMBER_STATE_RW)
|
|
__bch2_dev_read_only(c, ca);
|
|
|
|
bch_notice(ca, "%s", bch2_dev_state[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);
|
|
bch2_write_super(c);
|
|
mutex_unlock(&c->sb_lock);
|
|
|
|
if (new_state == BCH_MEMBER_STATE_RW &&
|
|
__bch2_dev_read_write(c, ca))
|
|
ret = -ENOMEM;
|
|
|
|
rebalance_wakeup(c);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int bch2_dev_set_state(struct bch_fs *c, struct bch_dev *ca,
|
|
enum bch_member_state new_state, int flags)
|
|
{
|
|
int ret;
|
|
|
|
mutex_lock(&c->state_lock);
|
|
ret = __bch2_dev_set_state(c, ca, new_state, flags);
|
|
mutex_unlock(&c->state_lock);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* Device add/removal: */
|
|
|
|
int bch2_dev_remove(struct bch_fs *c, struct bch_dev *ca, int flags)
|
|
{
|
|
struct bch_sb_field_members *mi;
|
|
unsigned dev_idx = ca->dev_idx, data;
|
|
int ret = -EINVAL;
|
|
|
|
mutex_lock(&c->state_lock);
|
|
|
|
percpu_ref_put(&ca->ref); /* XXX */
|
|
|
|
if (!bch2_dev_state_allowed(c, ca, BCH_MEMBER_STATE_FAILED, flags)) {
|
|
bch_err(ca, "Cannot remove without losing data");
|
|
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);
|
|
goto err;
|
|
}
|
|
|
|
ret = bch2_journal_flush_device_pins(&c->journal, ca->dev_idx);
|
|
if (ret) {
|
|
bch_err(ca, "Remove failed: error %i flushing journal", ret);
|
|
goto err;
|
|
}
|
|
|
|
data = bch2_dev_has_data(c, ca);
|
|
if (data) {
|
|
char data_has_str[100];
|
|
|
|
bch2_string_opt_to_text(&PBUF(data_has_str),
|
|
bch2_data_types, data);
|
|
bch_err(ca, "Remove failed, still has data (%s)", data_has_str);
|
|
ret = -EBUSY;
|
|
goto err;
|
|
}
|
|
|
|
ret = bch2_btree_delete_range(c, BTREE_ID_ALLOC,
|
|
POS(ca->dev_idx, 0),
|
|
POS(ca->dev_idx + 1, 0),
|
|
NULL);
|
|
if (ret) {
|
|
bch_err(ca, "Remove failed, error deleting alloc info");
|
|
goto err;
|
|
}
|
|
|
|
/*
|
|
* must flush all existing journal entries, they might have
|
|
* (overwritten) keys that point to the device we're removing:
|
|
*/
|
|
bch2_journal_flush_all_pins(&c->journal);
|
|
ret = bch2_journal_error(&c->journal);
|
|
if (ret) {
|
|
bch_err(ca, "Remove failed, journal error");
|
|
goto err;
|
|
}
|
|
|
|
__bch2_dev_offline(c, ca);
|
|
|
|
mutex_lock(&c->sb_lock);
|
|
rcu_assign_pointer(c->devs[ca->dev_idx], NULL);
|
|
mutex_unlock(&c->sb_lock);
|
|
|
|
percpu_ref_kill(&ca->ref);
|
|
wait_for_completion(&ca->ref_completion);
|
|
|
|
bch2_dev_free(ca);
|
|
|
|
/*
|
|
* 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));
|
|
|
|
bch2_write_super(c);
|
|
|
|
mutex_unlock(&c->sb_lock);
|
|
mutex_unlock(&c->state_lock);
|
|
return 0;
|
|
err:
|
|
if (ca->mi.state == BCH_MEMBER_STATE_RW)
|
|
__bch2_dev_read_write(c, ca);
|
|
mutex_unlock(&c->state_lock);
|
|
return ret;
|
|
}
|
|
|
|
static void dev_usage_clear(struct bch_dev *ca)
|
|
{
|
|
struct bucket_array *buckets;
|
|
int cpu;
|
|
|
|
for_each_possible_cpu(cpu) {
|
|
struct bch_dev_usage *p =
|
|
per_cpu_ptr(ca->usage[0], cpu);
|
|
memset(p, 0, sizeof(*p));
|
|
}
|
|
|
|
down_read(&ca->bucket_lock);
|
|
buckets = bucket_array(ca);
|
|
|
|
memset(buckets->b, 0, sizeof(buckets->b[0]) * buckets->nbuckets);
|
|
up_read(&ca->bucket_lock);
|
|
}
|
|
|
|
/* Add new device to running filesystem: */
|
|
int bch2_dev_add(struct bch_fs *c, const char *path)
|
|
{
|
|
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_member dev_mi;
|
|
unsigned dev_idx, nr_devices, u64s;
|
|
int ret;
|
|
|
|
ret = bch2_read_super(path, &opts, &sb);
|
|
if (ret)
|
|
return ret;
|
|
|
|
err = bch2_sb_validate(&sb);
|
|
if (err)
|
|
return -EINVAL;
|
|
|
|
dev_mi = bch2_sb_get_members(sb.sb)->members[sb.sb->dev_idx];
|
|
|
|
err = bch2_dev_may_add(sb.sb, c);
|
|
if (err)
|
|
return -EINVAL;
|
|
|
|
ca = __bch2_dev_alloc(c, &dev_mi);
|
|
if (!ca) {
|
|
bch2_free_super(&sb);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
ret = __bch2_dev_attach_bdev(ca, &sb);
|
|
if (ret) {
|
|
bch2_dev_free(ca);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* We want to allocate journal on the new device before adding the new
|
|
* device to the filesystem because allocating after we attach requires
|
|
* spinning up the allocator thread, and the allocator thread requires
|
|
* doing btree writes, which if the existing devices are RO isn't going
|
|
* to work
|
|
*
|
|
* So we have to mark where the superblocks are, but marking allocated
|
|
* data normally updates the filesystem usage too, so we have to mark,
|
|
* allocate the journal, reset all the marks, then remark after we
|
|
* attach...
|
|
*/
|
|
bch2_mark_dev_superblock(ca->fs, ca, 0);
|
|
|
|
err = "journal alloc failed";
|
|
ret = bch2_dev_journal_alloc(ca);
|
|
if (ret)
|
|
goto err;
|
|
|
|
dev_usage_clear(ca);
|
|
|
|
mutex_lock(&c->state_lock);
|
|
mutex_lock(&c->sb_lock);
|
|
|
|
err = "insufficient space in new superblock";
|
|
ret = bch2_sb_from_fs(c, ca);
|
|
if (ret)
|
|
goto err_unlock;
|
|
|
|
mi = bch2_sb_get_members(ca->disk_sb.sb);
|
|
|
|
if (!bch2_sb_resize_members(&ca->disk_sb,
|
|
le32_to_cpu(mi->field.u64s) +
|
|
sizeof(dev_mi) / sizeof(u64))) {
|
|
ret = -ENOSPC;
|
|
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))
|
|
goto have_slot;
|
|
no_slot:
|
|
err = "no slots available in superblock";
|
|
ret = -ENOSPC;
|
|
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);
|
|
|
|
err = "no space in superblock for member info";
|
|
ret = -ENOSPC;
|
|
|
|
mi = bch2_sb_resize_members(&c->disk_sb, u64s);
|
|
if (!mi)
|
|
goto err_unlock;
|
|
|
|
/* success: */
|
|
|
|
mi->members[dev_idx] = dev_mi;
|
|
mi->members[dev_idx].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);
|
|
|
|
bch2_mark_dev_superblock(c, ca, 0);
|
|
|
|
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;
|
|
}
|
|
|
|
mutex_unlock(&c->state_lock);
|
|
return 0;
|
|
|
|
err_unlock:
|
|
mutex_unlock(&c->sb_lock);
|
|
mutex_unlock(&c->state_lock);
|
|
err:
|
|
if (ca)
|
|
bch2_dev_free(ca);
|
|
bch2_free_super(&sb);
|
|
bch_err(c, "Unable to add device: %s", err);
|
|
return ret;
|
|
err_late:
|
|
bch_err(c, "Error going rw after adding device: %s", err);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Hot add existing device to running filesystem: */
|
|
int bch2_dev_online(struct bch_fs *c, const char *path)
|
|
{
|
|
struct bch_opts opts = bch2_opts_empty();
|
|
struct bch_sb_handle sb = { NULL };
|
|
struct bch_sb_field_members *mi;
|
|
struct bch_dev *ca;
|
|
unsigned dev_idx;
|
|
const char *err;
|
|
int ret;
|
|
|
|
mutex_lock(&c->state_lock);
|
|
|
|
ret = bch2_read_super(path, &opts, &sb);
|
|
if (ret) {
|
|
mutex_unlock(&c->state_lock);
|
|
return ret;
|
|
}
|
|
|
|
dev_idx = sb.sb->dev_idx;
|
|
|
|
err = bch2_dev_in_fs(c->disk_sb.sb, sb.sb);
|
|
if (err)
|
|
goto err;
|
|
|
|
if (bch2_dev_attach_bdev(c, &sb)) {
|
|
err = "bch2_dev_attach_bdev() error";
|
|
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)
|
|
goto err;
|
|
}
|
|
|
|
mutex_lock(&c->sb_lock);
|
|
mi = bch2_sb_get_members(c->disk_sb.sb);
|
|
|
|
mi->members[ca->dev_idx].last_mount =
|
|
cpu_to_le64(ktime_get_real_seconds());
|
|
|
|
bch2_write_super(c);
|
|
mutex_unlock(&c->sb_lock);
|
|
|
|
mutex_unlock(&c->state_lock);
|
|
return 0;
|
|
err:
|
|
mutex_unlock(&c->state_lock);
|
|
bch2_free_super(&sb);
|
|
bch_err(c, "error bringing %s online: %s", path, err);
|
|
return -EINVAL;
|
|
}
|
|
|
|
int bch2_dev_offline(struct bch_fs *c, struct bch_dev *ca, int flags)
|
|
{
|
|
mutex_lock(&c->state_lock);
|
|
|
|
if (!bch2_dev_is_online(ca)) {
|
|
bch_err(ca, "Already offline");
|
|
mutex_unlock(&c->state_lock);
|
|
return 0;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
__bch2_dev_offline(c, ca);
|
|
|
|
mutex_unlock(&c->state_lock);
|
|
return 0;
|
|
}
|
|
|
|
int bch2_dev_resize(struct bch_fs *c, struct bch_dev *ca, u64 nbuckets)
|
|
{
|
|
struct bch_member *mi;
|
|
int ret = 0;
|
|
|
|
mutex_lock(&c->state_lock);
|
|
|
|
if (nbuckets < ca->mi.nbuckets) {
|
|
bch_err(ca, "Cannot shrink yet");
|
|
ret = -EINVAL;
|
|
goto err;
|
|
}
|
|
|
|
if (bch2_dev_is_online(ca) &&
|
|
get_capacity(ca->disk_sb.bdev->bd_disk) <
|
|
ca->mi.bucket_size * nbuckets) {
|
|
bch_err(ca, "New size larger than device");
|
|
ret = -EINVAL;
|
|
goto err;
|
|
}
|
|
|
|
ret = bch2_dev_buckets_resize(c, ca, nbuckets);
|
|
if (ret) {
|
|
bch_err(ca, "Resize error: %i", 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);
|
|
|
|
bch2_write_super(c);
|
|
mutex_unlock(&c->sb_lock);
|
|
|
|
bch2_recalc_capacity(c);
|
|
err:
|
|
mutex_unlock(&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 *ca;
|
|
dev_t dev;
|
|
unsigned i;
|
|
int ret;
|
|
|
|
ret = lookup_bdev(path, &dev);
|
|
if (ret)
|
|
return ERR_PTR(ret);
|
|
|
|
for_each_member_device(ca, c, i)
|
|
if (ca->disk_sb.bdev->bd_dev == dev)
|
|
goto found;
|
|
|
|
ca = ERR_PTR(-ENOENT);
|
|
found:
|
|
return ca;
|
|
}
|
|
|
|
/* Filesystem open: */
|
|
|
|
struct bch_fs *bch2_fs_open(char * const *devices, unsigned nr_devices,
|
|
struct bch_opts opts)
|
|
{
|
|
struct bch_sb_handle *sb = NULL;
|
|
struct bch_fs *c = NULL;
|
|
unsigned i, best_sb = 0;
|
|
const char *err;
|
|
int ret = -ENOMEM;
|
|
|
|
pr_verbose_init(opts, "");
|
|
|
|
if (!nr_devices) {
|
|
c = ERR_PTR(-EINVAL);
|
|
goto out2;
|
|
}
|
|
|
|
if (!try_module_get(THIS_MODULE)) {
|
|
c = ERR_PTR(-ENODEV);
|
|
goto out2;
|
|
}
|
|
|
|
sb = kcalloc(nr_devices, sizeof(*sb), GFP_KERNEL);
|
|
if (!sb)
|
|
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++)
|
|
if (le64_to_cpu(sb[i].sb->seq) >
|
|
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)
|
|
goto err_print;
|
|
}
|
|
|
|
ret = -ENOMEM;
|
|
c = bch2_fs_alloc(sb[best_sb].sb, opts);
|
|
if (!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;
|
|
}
|
|
mutex_unlock(&c->state_lock);
|
|
|
|
err = "insufficient devices";
|
|
if (!bch2_fs_may_start(c))
|
|
goto err_print;
|
|
|
|
if (!c->opts.nostart) {
|
|
err = bch2_fs_start(c);
|
|
if (err)
|
|
goto err_print;
|
|
}
|
|
out:
|
|
kfree(sb);
|
|
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;
|
|
err:
|
|
if (c)
|
|
bch2_fs_stop(c);
|
|
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();
|
|
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_chardev_init() ||
|
|
bch2_vfs_init() ||
|
|
bch2_debug_init())
|
|
goto err;
|
|
|
|
return 0;
|
|
err:
|
|
bcachefs_exit();
|
|
return -ENOMEM;
|
|
}
|
|
|
|
#define BCH_DEBUG_PARAM(name, description) \
|
|
bool bch2_##name; \
|
|
module_param_named(name, bch2_##name, bool, 0644); \
|
|
MODULE_PARM_DESC(name, description);
|
|
BCH_DEBUG_PARAMS()
|
|
#undef BCH_DEBUG_PARAM
|
|
|
|
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);
|