mirrors/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2025-11-04 02:30:34 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

bcachefs: Pull out data_update.c

Browse source 
This is the start of reorganizing the data IO paths. The plan is to also
break apart io.c into data_read.c and data_write.c, and migrate_write
will be renamed to the data_update path.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2022-06-13 19:07:19 -04:00 committed by Kent Overstreet
parent 30f0349d62
commit c501fef6de
7 changed files with 456 additions and 432 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

1
fs/bcachefs/Makefile
View file

@ -25,6 +25,7 @@ bcachefs-y := \
debug.o \
dirent.o \
disk_groups.o \
data_update.o \
ec.o \
error.o \
extents.o \

383
fs/bcachefs/data_update.c Normal file
View file

@ -0,0 +1,383 @@
// SPDX-License-Identifier: GPL-2.0
#include "bcachefs.h"
#include "alloc_foreground.h"
#include "bkey_buf.h"
#include "btree_update.h"
#include "buckets.h"
#include "data_update.h"
#include "ec.h"
#include "extents.h"
#include "io.h"
#include "keylist.h"
#include "move.h"
#include "subvolume.h"
#include "trace.h"
static int insert_snapshot_whiteouts(struct btree_trans *trans,
enum btree_id id,
struct bpos old_pos,
struct bpos new_pos)
{
struct bch_fs *c = trans->c;
struct btree_iter iter, update_iter;
struct bkey_s_c k;
struct snapshots_seen s;
int ret;
if (!btree_type_has_snapshots(id))
return 0;
snapshots_seen_init(&s);
if (!bkey_cmp(old_pos, new_pos))
return 0;
if (!snapshot_t(c, old_pos.snapshot)->children[0])
return 0;
bch2_trans_iter_init(trans, &iter, id, old_pos,
BTREE_ITER_NOT_EXTENTS|
BTREE_ITER_ALL_SNAPSHOTS);
while (1) {
next:
k = bch2_btree_iter_prev(&iter);
ret = bkey_err(k);
if (ret)
break;
if (bkey_cmp(old_pos, k.k->p))
break;
if (bch2_snapshot_is_ancestor(c, k.k->p.snapshot, old_pos.snapshot)) {
struct bkey_i *update;
u32 *i;
darray_for_each(s.ids, i)
if (bch2_snapshot_is_ancestor(c, k.k->p.snapshot, *i))
goto next;
update = bch2_trans_kmalloc(trans, sizeof(struct bkey_i));
ret = PTR_ERR_OR_ZERO(update);
if (ret)
break;
bkey_init(&update->k);
update->k.p = new_pos;
update->k.p.snapshot = k.k->p.snapshot;
bch2_trans_iter_init(trans, &update_iter, id, update->k.p,
BTREE_ITER_NOT_EXTENTS|
BTREE_ITER_ALL_SNAPSHOTS|
BTREE_ITER_INTENT);
ret = bch2_btree_iter_traverse(&update_iter) ?:
bch2_trans_update(trans, &update_iter, update,
BTREE_UPDATE_INTERNAL_SNAPSHOT_NODE);
bch2_trans_iter_exit(trans, &update_iter);
if (ret)
break;
ret = snapshots_seen_add(c, &s, k.k->p.snapshot);
if (ret)
break;
}
}
bch2_trans_iter_exit(trans, &iter);
darray_exit(&s.ids);
return ret;
}
int bch2_data_update_index_update(struct bch_write_op *op)
{
struct bch_fs *c = op->c;
struct btree_trans trans;
struct btree_iter iter;
struct data_update *m =
container_of(op, struct data_update, op);
struct open_bucket *ec_ob = ec_open_bucket(c, &op->open_buckets);
struct keylist *keys = &op->insert_keys;
struct bkey_buf _new, _insert;
int ret = 0;
bch2_bkey_buf_init(&_new);
bch2_bkey_buf_init(&_insert);
bch2_bkey_buf_realloc(&_insert, c, U8_MAX);
bch2_trans_init(&trans, c, BTREE_ITER_MAX, 1024);
bch2_trans_iter_init(&trans, &iter, m->btree_id,
bkey_start_pos(&bch2_keylist_front(keys)->k),
BTREE_ITER_SLOTS|BTREE_ITER_INTENT);
while (1) {
struct bkey_s_c k;
struct bkey_i *insert;
struct bkey_i_extent *new;
const union bch_extent_entry *entry;
struct extent_ptr_decoded p;
struct bpos next_pos;
bool did_work = false;
bool extending = false, should_check_enospc;
s64 i_sectors_delta = 0, disk_sectors_delta = 0;
bch2_trans_begin(&trans);
k = bch2_btree_iter_peek_slot(&iter);
ret = bkey_err(k);
if (ret)
goto err;
new = bkey_i_to_extent(bch2_keylist_front(keys));
if (bversion_cmp(k.k->version, new->k.version) ||
!bch2_bkey_matches_ptr(c, k, m->ptr, m->offset))
goto nomatch;
bkey_reassemble(_insert.k, k);
insert = _insert.k;
bch2_bkey_buf_copy(&_new, c, bch2_keylist_front(keys));
new = bkey_i_to_extent(_new.k);
bch2_cut_front(iter.pos, &new->k_i);
bch2_cut_front(iter.pos, insert);
bch2_cut_back(new->k.p, insert);
bch2_cut_back(insert->k.p, &new->k_i);
if (m->data_cmd == DATA_REWRITE) {
struct bch_extent_ptr *new_ptr, *old_ptr = (void *)
bch2_bkey_has_device(bkey_i_to_s_c(insert),
m->data_opts.rewrite_dev);
if (!old_ptr)
goto nomatch;
if (old_ptr->cached)
extent_for_each_ptr(extent_i_to_s(new), new_ptr)
new_ptr->cached = true;
__bch2_bkey_drop_ptr(bkey_i_to_s(insert), old_ptr);
}
extent_for_each_ptr_decode(extent_i_to_s(new), p, entry) {
if (bch2_bkey_has_device(bkey_i_to_s_c(insert), p.ptr.dev)) {
/*
* raced with another move op? extent already
* has a pointer to the device we just wrote
* data to
*/
continue;
}
bch2_extent_ptr_decoded_append(insert, &p);
did_work = true;
}
if (!did_work)
goto nomatch;
bch2_bkey_narrow_crcs(insert,
(struct bch_extent_crc_unpacked) { 0 });
bch2_extent_normalize(c, bkey_i_to_s(insert));
bch2_bkey_mark_replicas_cached(c, bkey_i_to_s(insert),
op->opts.background_target,
op->opts.data_replicas);
ret = bch2_sum_sector_overwrites(&trans, &iter, insert,
&extending,
&should_check_enospc,
&i_sectors_delta,
&disk_sectors_delta);
if (ret)
goto err;
if (disk_sectors_delta > (s64) op->res.sectors) {
ret = bch2_disk_reservation_add(c, &op->res,
disk_sectors_delta - op->res.sectors,
!should_check_enospc
? BCH_DISK_RESERVATION_NOFAIL : 0);
if (ret)
goto out;
}
next_pos = insert->k.p;
ret = insert_snapshot_whiteouts(&trans, m->btree_id,
k.k->p, insert->k.p) ?:
bch2_trans_update(&trans, &iter, insert,
BTREE_UPDATE_INTERNAL_SNAPSHOT_NODE) ?:
bch2_trans_commit(&trans, &op->res,
op_journal_seq(op),
BTREE_INSERT_NOFAIL|
m->data_opts.btree_insert_flags);
if (!ret) {
bch2_btree_iter_set_pos(&iter, next_pos);
atomic_long_inc(&c->extent_migrate_done);
if (ec_ob)
bch2_ob_add_backpointer(c, ec_ob, &insert->k);
}
err:
if (ret == -EINTR)
ret = 0;
if (ret)
break;
next:
while (bkey_cmp(iter.pos, bch2_keylist_front(keys)->k.p) >= 0) {
bch2_keylist_pop_front(keys);
if (bch2_keylist_empty(keys))
goto out;
}
continue;
nomatch:
if (m->ctxt) {
BUG_ON(k.k->p.offset <= iter.pos.offset);
atomic64_inc(&m->ctxt->stats->keys_raced);
atomic64_add(k.k->p.offset - iter.pos.offset,
&m->ctxt->stats->sectors_raced);
}
atomic_long_inc(&c->extent_migrate_raced);
trace_move_race(&new->k);
bch2_btree_iter_advance(&iter);
goto next;
}
out:
bch2_trans_iter_exit(&trans, &iter);
bch2_trans_exit(&trans);
bch2_bkey_buf_exit(&_insert, c);
bch2_bkey_buf_exit(&_new, c);
BUG_ON(ret == -EINTR);
return ret;
}
void bch2_data_update_read_done(struct data_update *m, struct bch_read_bio *rbio)
{
/* write bio must own pages: */
BUG_ON(!m->op.wbio.bio.bi_vcnt);
m->ptr = rbio->pick.ptr;
m->offset = rbio->data_pos.offset - rbio->pick.crc.offset;
m->op.devs_have = rbio->devs_have;
m->op.pos = rbio->data_pos;
m->op.version = rbio->version;
m->op.crc = rbio->pick.crc;
m->op.wbio.bio.bi_iter.bi_size = m->op.crc.compressed_size << 9;
if (m->data_cmd == DATA_REWRITE)
bch2_dev_list_drop_dev(&m->op.devs_have, m->data_opts.rewrite_dev);
}
int bch2_data_update_init(struct bch_fs *c, struct data_update *m,
struct write_point_specifier wp,
struct bch_io_opts io_opts,
enum data_cmd data_cmd,
struct data_opts data_opts,
enum btree_id btree_id,
struct bkey_s_c k)
{
struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(k);
const union bch_extent_entry *entry;
struct bch_extent_crc_unpacked crc;
struct extent_ptr_decoded p;
int ret;
m->btree_id = btree_id;
m->data_cmd = data_cmd;
m->data_opts = data_opts;
m->nr_ptrs_reserved = 0;
bch2_write_op_init(&m->op, c, io_opts);
if (!bch2_bkey_is_incompressible(k))
m->op.compression_type =
bch2_compression_opt_to_type[io_opts.background_compression ?:
io_opts.compression];
else
m->op.incompressible = true;
m->op.target = data_opts.target,
m->op.write_point = wp;
/*
* op->csum_type is normally initialized from the fs/file's current
* options - but if an extent is encrypted, we require that it stays
* encrypted:
*/
bkey_for_each_crc(k.k, ptrs, crc, entry)
if (bch2_csum_type_is_encryption(crc.csum_type)) {
m->op.nonce = crc.nonce + crc.offset;
m->op.csum_type = crc.csum_type;
break;
}
if (m->data_opts.btree_insert_flags & BTREE_INSERT_USE_RESERVE) {
m->op.alloc_reserve = RESERVE_movinggc;
} else {
/* XXX: this should probably be passed in */
m->op.flags |= BCH_WRITE_ONLY_SPECIFIED_DEVS;
}
m->op.flags |= BCH_WRITE_PAGES_STABLE|
BCH_WRITE_PAGES_OWNED|
BCH_WRITE_DATA_ENCODED|
BCH_WRITE_FROM_INTERNAL|
BCH_WRITE_MOVE;
m->op.nr_replicas = data_opts.nr_replicas;
m->op.nr_replicas_required = data_opts.nr_replicas;
switch (data_cmd) {
case DATA_ADD_REPLICAS: {
/*
* DATA_ADD_REPLICAS is used for moving data to a different
* device in the background, and due to compression the new copy
* might take up more space than the old copy:
*/
#if 0
int nr = (int) io_opts.data_replicas -
bch2_bkey_nr_ptrs_allocated(k);
#endif
int nr = (int) io_opts.data_replicas;
if (nr > 0) {
m->op.nr_replicas = m->nr_ptrs_reserved = nr;
ret = bch2_disk_reservation_get(c, &m->op.res,
k.k->size, m->op.nr_replicas, 0);
if (ret)
return ret;
}
break;
}
case DATA_REWRITE: {
unsigned compressed_sectors = 0;
bkey_for_each_ptr_decode(k.k, ptrs, p, entry)
if (p.ptr.dev == data_opts.rewrite_dev) {
if (p.ptr.cached)
m->op.flags |= BCH_WRITE_CACHED;
if (!p.ptr.cached &&
crc_is_compressed(p.crc))
compressed_sectors += p.crc.compressed_size;
}
if (compressed_sectors) {
ret = bch2_disk_reservation_add(c, &m->op.res,
k.k->size * m->op.nr_replicas,
BCH_DISK_RESERVATION_NOFAIL);
if (ret)
return ret;
}
break;
}
case DATA_PROMOTE:
m->op.flags |= BCH_WRITE_ALLOC_NOWAIT;
m->op.flags |= BCH_WRITE_CACHED;
break;
default:
BUG();
}
return 0;
}

48
fs/bcachefs/data_update.h Normal file
View file

@ -0,0 +1,48 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _BCACHEFS_DATA_UPDATE_H
#define _BCACHEFS_DATA_UPDATE_H
#include "io_types.h"
enum data_cmd {
DATA_SKIP,
DATA_SCRUB,
DATA_ADD_REPLICAS,
DATA_REWRITE,
DATA_PROMOTE,
};
struct data_opts {
u16 target;
u8 rewrite_dev;
u8 nr_replicas;
int btree_insert_flags;
};
struct data_update {
enum btree_id btree_id;
enum data_cmd data_cmd;
struct data_opts data_opts;
unsigned nr_ptrs_reserved;
struct moving_context *ctxt;
/* what we read: */
struct bch_extent_ptr ptr;
u64 offset;
struct bch_write_op op;
};
int bch2_data_update_index_update(struct bch_write_op *);
void bch2_data_update_read_done(struct data_update *, struct bch_read_bio *);
int bch2_data_update_init(struct bch_fs *, struct data_update *,
struct write_point_specifier,
struct bch_io_opts,
enum data_cmd, struct data_opts,
enum btree_id, struct bkey_s_c);
#endif /* _BCACHEFS_DATA_UPDATE_H */

1
fs/bcachefs/ec.h
View file

@ -4,6 +4,7 @@
#include "ec_types.h"
#include "buckets_types.h"
#include "extents_types.h"
#include "keylist_types.h"
int bch2_stripe_invalid(const struct bch_fs *, struct bkey_s_c,

9
fs/bcachefs/io.c
View file

@ -16,6 +16,7 @@
#include "checksum.h"
#include "compress.h"
#include "clock.h"
#include "data_update.h"
#include "debug.h"
#include "disk_groups.h"
#include "ec.h"
@ -660,7 +661,7 @@ static void __bch2_write_index(struct bch_write_op *op)
ret = !(op->flags & BCH_WRITE_MOVE)
? bch2_write_index_default(op)
: bch2_migrate_index_update(op);
: bch2_data_update_index_update(op);
BUG_ON(ret == -EINTR);
BUG_ON(keylist_sectors(keys) && !ret);
@ -1433,7 +1434,7 @@ struct promote_op {
struct rhash_head hash;
struct bpos pos;
struct migrate_write write;
struct data_update write;
struct bio_vec bi_inline_vecs[0]; /* must be last */
};
@ -1508,7 +1509,7 @@ static void promote_start(struct promote_op *op, struct bch_read_bio *rbio)
sizeof(struct bio_vec) * rbio->bio.bi_vcnt);
swap(bio->bi_vcnt, rbio->bio.bi_vcnt);
bch2_migrate_read_done(&op->write, rbio);
bch2_data_update_read_done(&op->write, rbio);
closure_call(&op->write.op.cl, bch2_write, c->btree_update_wq, NULL);
}
@ -1565,7 +1566,7 @@ static struct promote_op *__promote_alloc(struct bch_fs *c,
bio = &op->write.op.wbio.bio;
bio_init(bio, NULL, bio->bi_inline_vecs, pages, 0);
ret = bch2_migrate_write_init(c, &op->write,
ret = bch2_data_update_init(c, &op->write,
writepoint_hashed((unsigned long) current),
opts,
DATA_PROMOTE,

391
fs/bcachefs/move.c
View file

@ -6,7 +6,6 @@
#include "btree_gc.h"
#include "btree_update.h"
#include "btree_update_interior.h"
#include "buckets.h"
#include "disk_groups.h"
#include "ec.h"
#include "inode.h"
@ -15,7 +14,6 @@
#include "keylist.h"
#include "move.h"
#include "replicas.h"
#include "subvolume.h"
#include "super-io.h"
#include "trace.h"
@ -32,394 +30,11 @@ struct moving_io {
struct bch_read_bio rbio;
struct migrate_write write;
struct data_update write;
/* Must be last since it is variable size */
struct bio_vec bi_inline_vecs[0];
};
struct moving_context {
/* Closure for waiting on all reads and writes to complete */
struct closure cl;
struct bch_move_stats *stats;
struct list_head reads;
/* in flight sectors: */
atomic_t read_sectors;
atomic_t write_sectors;
wait_queue_head_t wait;
};
static int insert_snapshot_whiteouts(struct btree_trans *trans,
enum btree_id id,
struct bpos old_pos,
struct bpos new_pos)
{
struct bch_fs *c = trans->c;
struct btree_iter iter, update_iter;
struct bkey_s_c k;
struct snapshots_seen s;
int ret;
if (!btree_type_has_snapshots(id))
return 0;
snapshots_seen_init(&s);
if (!bkey_cmp(old_pos, new_pos))
return 0;
if (!snapshot_t(c, old_pos.snapshot)->children[0])
return 0;
bch2_trans_iter_init(trans, &iter, id, old_pos,
BTREE_ITER_NOT_EXTENTS|
BTREE_ITER_ALL_SNAPSHOTS);
while (1) {
next:
k = bch2_btree_iter_prev(&iter);
ret = bkey_err(k);
if (ret)
break;
if (bkey_cmp(old_pos, k.k->p))
break;
if (bch2_snapshot_is_ancestor(c, k.k->p.snapshot, old_pos.snapshot)) {
struct bkey_i *update;
u32 *i;
darray_for_each(s.ids, i)
if (bch2_snapshot_is_ancestor(c, k.k->p.snapshot, *i))
goto next;
update = bch2_trans_kmalloc(trans, sizeof(struct bkey_i));
ret = PTR_ERR_OR_ZERO(update);
if (ret)
break;
bkey_init(&update->k);
update->k.p = new_pos;
update->k.p.snapshot = k.k->p.snapshot;
bch2_trans_iter_init(trans, &update_iter, id, update->k.p,
BTREE_ITER_NOT_EXTENTS|
BTREE_ITER_ALL_SNAPSHOTS|
BTREE_ITER_INTENT);
ret = bch2_btree_iter_traverse(&update_iter) ?:
bch2_trans_update(trans, &update_iter, update,
BTREE_UPDATE_INTERNAL_SNAPSHOT_NODE);
bch2_trans_iter_exit(trans, &update_iter);
if (ret)
break;
ret = snapshots_seen_add(c, &s, k.k->p.snapshot);
if (ret)
break;
}
}
bch2_trans_iter_exit(trans, &iter);
darray_exit(&s.ids);
return ret;
}
int bch2_migrate_index_update(struct bch_write_op *op)
{
struct bch_fs *c = op->c;
struct btree_trans trans;
struct btree_iter iter;
struct migrate_write *m =
container_of(op, struct migrate_write, op);
struct open_bucket *ec_ob = ec_open_bucket(c, &op->open_buckets);
struct keylist *keys = &op->insert_keys;
struct bkey_buf _new, _insert;
int ret = 0;
bch2_bkey_buf_init(&_new);
bch2_bkey_buf_init(&_insert);
bch2_bkey_buf_realloc(&_insert, c, U8_MAX);
bch2_trans_init(&trans, c, BTREE_ITER_MAX, 1024);
bch2_trans_iter_init(&trans, &iter, m->btree_id,
bkey_start_pos(&bch2_keylist_front(keys)->k),
BTREE_ITER_SLOTS|BTREE_ITER_INTENT);
while (1) {
struct bkey_s_c k;
struct bkey_i *insert;
struct bkey_i_extent *new;
const union bch_extent_entry *entry;
struct extent_ptr_decoded p;
struct bpos next_pos;
bool did_work = false;
bool extending = false, should_check_enospc;
s64 i_sectors_delta = 0, disk_sectors_delta = 0;
bch2_trans_begin(&trans);
k = bch2_btree_iter_peek_slot(&iter);
ret = bkey_err(k);
if (ret)
goto err;
new = bkey_i_to_extent(bch2_keylist_front(keys));
if (bversion_cmp(k.k->version, new->k.version) ||
!bch2_bkey_matches_ptr(c, k, m->ptr, m->offset))
goto nomatch;
bkey_reassemble(_insert.k, k);
insert = _insert.k;
bch2_bkey_buf_copy(&_new, c, bch2_keylist_front(keys));
new = bkey_i_to_extent(_new.k);
bch2_cut_front(iter.pos, &new->k_i);
bch2_cut_front(iter.pos, insert);
bch2_cut_back(new->k.p, insert);
bch2_cut_back(insert->k.p, &new->k_i);
if (m->data_cmd == DATA_REWRITE) {
struct bch_extent_ptr *new_ptr, *old_ptr = (void *)
bch2_bkey_has_device(bkey_i_to_s_c(insert),
m->data_opts.rewrite_dev);
if (!old_ptr)
goto nomatch;
if (old_ptr->cached)
extent_for_each_ptr(extent_i_to_s(new), new_ptr)
new_ptr->cached = true;
__bch2_bkey_drop_ptr(bkey_i_to_s(insert), old_ptr);
}
extent_for_each_ptr_decode(extent_i_to_s(new), p, entry) {
if (bch2_bkey_has_device(bkey_i_to_s_c(insert), p.ptr.dev)) {
/*
* raced with another move op? extent already
* has a pointer to the device we just wrote
* data to
*/
continue;
}
bch2_extent_ptr_decoded_append(insert, &p);
did_work = true;
}
if (!did_work)
goto nomatch;
bch2_bkey_narrow_crcs(insert,
(struct bch_extent_crc_unpacked) { 0 });
bch2_extent_normalize(c, bkey_i_to_s(insert));
bch2_bkey_mark_replicas_cached(c, bkey_i_to_s(insert),
op->opts.background_target,
op->opts.data_replicas);
ret = bch2_sum_sector_overwrites(&trans, &iter, insert,
&extending,
&should_check_enospc,
&i_sectors_delta,
&disk_sectors_delta);
if (ret)
goto err;
if (disk_sectors_delta > (s64) op->res.sectors) {
ret = bch2_disk_reservation_add(c, &op->res,
disk_sectors_delta - op->res.sectors,
!should_check_enospc
? BCH_DISK_RESERVATION_NOFAIL : 0);
if (ret)
goto out;
}
next_pos = insert->k.p;
ret = insert_snapshot_whiteouts(&trans, m->btree_id,
k.k->p, insert->k.p) ?:
bch2_trans_update(&trans, &iter, insert,
BTREE_UPDATE_INTERNAL_SNAPSHOT_NODE) ?:
bch2_trans_commit(&trans, &op->res,
op_journal_seq(op),
BTREE_INSERT_NOFAIL|
m->data_opts.btree_insert_flags);
if (!ret) {
bch2_btree_iter_set_pos(&iter, next_pos);
atomic_long_inc(&c->extent_migrate_done);
if (ec_ob)
bch2_ob_add_backpointer(c, ec_ob, &insert->k);
}
err:
if (ret == -EINTR)
ret = 0;
if (ret)
break;
next:
while (bkey_cmp(iter.pos, bch2_keylist_front(keys)->k.p) >= 0) {
bch2_keylist_pop_front(keys);
if (bch2_keylist_empty(keys))
goto out;
}
continue;
nomatch:
if (m->ctxt) {
BUG_ON(k.k->p.offset <= iter.pos.offset);
atomic64_inc(&m->ctxt->stats->keys_raced);
atomic64_add(k.k->p.offset - iter.pos.offset,
&m->ctxt->stats->sectors_raced);
}
atomic_long_inc(&c->extent_migrate_raced);
trace_move_race(&new->k);
bch2_btree_iter_advance(&iter);
goto next;
}
out:
bch2_trans_iter_exit(&trans, &iter);
bch2_trans_exit(&trans);
bch2_bkey_buf_exit(&_insert, c);
bch2_bkey_buf_exit(&_new, c);
BUG_ON(ret == -EINTR);
return ret;
}
void bch2_migrate_read_done(struct migrate_write *m, struct bch_read_bio *rbio)
{
/* write bio must own pages: */
BUG_ON(!m->op.wbio.bio.bi_vcnt);
m->ptr = rbio->pick.ptr;
m->offset = rbio->data_pos.offset - rbio->pick.crc.offset;
m->op.devs_have = rbio->devs_have;
m->op.pos = rbio->data_pos;
m->op.version = rbio->version;
m->op.crc = rbio->pick.crc;
m->op.wbio.bio.bi_iter.bi_size = m->op.crc.compressed_size << 9;
if (m->data_cmd == DATA_REWRITE)
bch2_dev_list_drop_dev(&m->op.devs_have, m->data_opts.rewrite_dev);
}
int bch2_migrate_write_init(struct bch_fs *c, struct migrate_write *m,
struct write_point_specifier wp,
struct bch_io_opts io_opts,
enum data_cmd data_cmd,
struct data_opts data_opts,
enum btree_id btree_id,
struct bkey_s_c k)
{
struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(k);
const union bch_extent_entry *entry;
struct bch_extent_crc_unpacked crc;
struct extent_ptr_decoded p;
int ret;
m->btree_id = btree_id;
m->data_cmd = data_cmd;
m->data_opts = data_opts;
m->nr_ptrs_reserved = 0;
bch2_write_op_init(&m->op, c, io_opts);
if (!bch2_bkey_is_incompressible(k))
m->op.compression_type =
bch2_compression_opt_to_type[io_opts.background_compression ?:
io_opts.compression];
else
m->op.incompressible = true;
m->op.target = data_opts.target,
m->op.write_point = wp;
/*
* op->csum_type is normally initialized from the fs/file's current
* options - but if an extent is encrypted, we require that it stays
* encrypted:
*/
bkey_for_each_crc(k.k, ptrs, crc, entry)
if (bch2_csum_type_is_encryption(crc.csum_type)) {
m->op.nonce = crc.nonce + crc.offset;
m->op.csum_type = crc.csum_type;
break;
}
if (m->data_opts.btree_insert_flags & BTREE_INSERT_USE_RESERVE) {
m->op.alloc_reserve = RESERVE_movinggc;
} else {
/* XXX: this should probably be passed in */
m->op.flags |= BCH_WRITE_ONLY_SPECIFIED_DEVS;
}
m->op.flags |= BCH_WRITE_PAGES_STABLE|
BCH_WRITE_PAGES_OWNED|
BCH_WRITE_DATA_ENCODED|
BCH_WRITE_FROM_INTERNAL|
BCH_WRITE_MOVE;
m->op.nr_replicas = data_opts.nr_replicas;
m->op.nr_replicas_required = data_opts.nr_replicas;
switch (data_cmd) {
case DATA_ADD_REPLICAS: {
/*
* DATA_ADD_REPLICAS is used for moving data to a different
* device in the background, and due to compression the new copy
* might take up more space than the old copy:
*/
#if 0
int nr = (int) io_opts.data_replicas -
bch2_bkey_nr_ptrs_allocated(k);
#endif
int nr = (int) io_opts.data_replicas;
if (nr > 0) {
m->op.nr_replicas = m->nr_ptrs_reserved = nr;
ret = bch2_disk_reservation_get(c, &m->op.res,
k.k->size, m->op.nr_replicas, 0);
if (ret)
return ret;
}
break;
}
case DATA_REWRITE: {
unsigned compressed_sectors = 0;
bkey_for_each_ptr_decode(k.k, ptrs, p, entry)
if (p.ptr.dev == data_opts.rewrite_dev) {
if (p.ptr.cached)
m->op.flags |= BCH_WRITE_CACHED;
if (!p.ptr.cached &&
crc_is_compressed(p.crc))
compressed_sectors += p.crc.compressed_size;
}
if (compressed_sectors) {
ret = bch2_disk_reservation_add(c, &m->op.res,
k.k->size * m->op.nr_replicas,
BCH_DISK_RESERVATION_NOFAIL);
if (ret)
return ret;
}
break;
}
case DATA_PROMOTE:
m->op.flags |= BCH_WRITE_ALLOC_NOWAIT;
m->op.flags |= BCH_WRITE_CACHED;
break;
default:
BUG();
}
return 0;
}
static void move_free(struct moving_io *io)
{
struct moving_context *ctxt = io->write.ctxt;
@ -457,7 +72,7 @@ static void move_write(struct moving_io *io)
closure_get(&io->write.ctxt->cl);
atomic_add(io->write_sectors, &io->write.ctxt->write_sectors);
bch2_migrate_read_done(&io->write, &io->rbio);
bch2_data_update_read_done(&io->write, &io->rbio);
closure_call(&io->write.op.cl, bch2_write, NULL, NULL);
}
@ -564,7 +179,7 @@ static int bch2_move_extent(struct btree_trans *trans,
io->rbio.bio.bi_iter.bi_sector = bkey_start_offset(k.k);
io->rbio.bio.bi_end_io = move_read_endio;
ret = bch2_migrate_write_init(c, &io->write, wp, io_opts,
ret = bch2_data_update_init(c, &io->write, wp, io_opts,
data_cmd, data_opts, btree_id, k);
if (ret)
goto err_free_pages;

53
fs/bcachefs/move.h
View file

@ -4,51 +4,26 @@
#include "btree_iter.h"
#include "buckets.h"
#include "io_types.h"
#include "data_update.h"
#include "move_types.h"
struct bch_read_bio;
struct moving_context;
enum data_cmd {
DATA_SKIP,
DATA_SCRUB,
DATA_ADD_REPLICAS,
DATA_REWRITE,
DATA_PROMOTE,
struct moving_context {
/* Closure for waiting on all reads and writes to complete */
struct closure cl;
struct bch_move_stats *stats;
struct list_head reads;
/* in flight sectors: */
atomic_t read_sectors;
atomic_t write_sectors;
wait_queue_head_t wait;
};
struct data_opts {
u16 target;
u8 rewrite_dev;
u8 nr_replicas;
int btree_insert_flags;
};
struct migrate_write {
enum btree_id btree_id;
enum data_cmd data_cmd;
struct data_opts data_opts;
unsigned nr_ptrs_reserved;
struct moving_context *ctxt;
/* what we read: */
struct bch_extent_ptr ptr;
u64 offset;
struct bch_write_op op;
};
int bch2_migrate_index_update(struct bch_write_op *);
void bch2_migrate_read_done(struct migrate_write *, struct bch_read_bio *);
int bch2_migrate_write_init(struct bch_fs *, struct migrate_write *,
struct write_point_specifier,
struct bch_io_opts,
enum data_cmd, struct data_opts,
enum btree_id, struct bkey_s_c);
typedef enum data_cmd (*move_pred_fn)(struct bch_fs *, void *,
struct bkey_s_c,
struct bch_io_opts *, struct data_opts *);