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bcachefs: Track incompressible data 

This fixes the background_compression option: wihout some way of marking
data as incompressible, rebalance will keep rewriting incompressible
data over and over.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2018-02-23 16:26:10 -05:00 committed by Kent Overstreet
parent 182084e3dc
commit ab05de4ce4
11 changed files with 82 additions and 44 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
fs/bcachefs/bcachefs_format.h
View File

@ -1298,7 +1298,8 @@ LE64_BITMASK(BCH_SB_ERASURE_CODE, struct bch_sb, flags[3], 0, 16);
x(reflink, 6) \
x(new_siphash, 7) \
x(inline_data, 8) \
x(new_extent_overwrite, 9)
x(new_extent_overwrite, 9) \
x(incompressible, 10)
enum bch_sb_feature {
#define x(f, n) BCH_FEATURE_##f,
@ -1378,11 +1379,12 @@ enum bch_csum_opts {
};
#define BCH_COMPRESSION_TYPES() \
x(none, 0) \
x(lz4_old, 1) \
x(gzip, 2) \
x(lz4, 3) \
x(zstd, 4)
x(none, 0) \
x(lz4_old, 1) \
x(gzip, 2) \
x(lz4, 3) \
x(zstd, 4) \
x(incompressible, 5)
enum bch_compression_type {
#define x(t, n) BCH_COMPRESSION_TYPE_##t,

3
fs/bcachefs/checksum.c
View File

@ -326,7 +326,7 @@ int bch2_rechecksum_bio(struct bch_fs *c, struct bio *bio,
BUG_ON(len_a + len_b > bio_sectors(bio));
BUG_ON(crc_old.uncompressed_size != bio_sectors(bio));
BUG_ON(crc_old.compression_type);
BUG_ON(crc_is_compressed(crc_old));
BUG_ON(bch2_csum_type_is_encryption(crc_old.csum_type) !=
bch2_csum_type_is_encryption(new_csum_type));
@ -355,6 +355,7 @@ int bch2_rechecksum_bio(struct bch_fs *c, struct bio *bio,
if (i->crc)
*i->crc = (struct bch_extent_crc_unpacked) {
.csum_type = i->csum_type,
.compression_type = crc_old.compression_type,
.compressed_size = i->len,
.uncompressed_size = i->len,
.offset = 0,

7
fs/bcachefs/checksum.h
View File

@ -155,13 +155,16 @@ static inline struct nonce null_nonce(void)
static inline struct nonce extent_nonce(struct bversion version,
struct bch_extent_crc_unpacked crc)
{
unsigned size = crc.compression_type ? crc.uncompressed_size : 0;
unsigned compression_type = crc_is_compressed(crc)
? crc.compression_type
: 0;
unsigned size = compression_type ? crc.uncompressed_size : 0;
struct nonce nonce = (struct nonce) {{
[0] = cpu_to_le32(size << 22),
[1] = cpu_to_le32(version.lo),
[2] = cpu_to_le32(version.lo >> 32),
[3] = cpu_to_le32(version.hi|
(crc.compression_type << 24))^BCH_NONCE_EXTENT,
(compression_type << 24))^BCH_NONCE_EXTENT,
}};
return nonce_add(nonce, crc.nonce << 9);

2
fs/bcachefs/compress.c
View File

@ -434,7 +434,7 @@ out:
bio_unmap_or_unbounce(c, dst_data);
return compression_type;
err:
compression_type = 0;
compression_type = BCH_COMPRESSION_TYPE_incompressible;
goto out;
}

26
fs/bcachefs/extents.c
View File

@ -336,7 +336,7 @@ enum merge_result bch2_extent_merge(struct bch_fs *c,
if (!bch2_checksum_mergeable(crc_l.csum_type))
return BCH_MERGE_NOMERGE;
if (crc_l.compression_type)
if (crc_is_compressed(crc_l))
return BCH_MERGE_NOMERGE;
if (crc_l.csum_type &&
@ -447,7 +447,7 @@ static inline bool bch2_crc_unpacked_cmp(struct bch_extent_crc_unpacked l,
static inline bool can_narrow_crc(struct bch_extent_crc_unpacked u,
struct bch_extent_crc_unpacked n)
{
return !u.compression_type &&
return !crc_is_compressed(u) &&
u.csum_type &&
u.uncompressed_size > u.live_size &&
bch2_csum_type_is_encryption(u.csum_type) ==
@ -491,7 +491,7 @@ bool bch2_bkey_narrow_crcs(struct bkey_i *k, struct bch_extent_crc_unpacked n)
/* Find a checksum entry that covers only live data: */
if (!n.csum_type) {
bkey_for_each_crc(&k->k, ptrs, u, i)
if (!u.compression_type &&
if (!crc_is_compressed(u) &&
u.csum_type &&
u.live_size == u.uncompressed_size) {
n = u;
@ -500,7 +500,7 @@ bool bch2_bkey_narrow_crcs(struct bkey_i *k, struct bch_extent_crc_unpacked n)
return false;
}
found:
BUG_ON(n.compression_type);
BUG_ON(crc_is_compressed(n));
BUG_ON(n.offset);
BUG_ON(n.live_size != k->k.size);
@ -609,8 +609,7 @@ unsigned bch2_bkey_nr_ptrs_fully_allocated(struct bkey_s_c k)
struct extent_ptr_decoded p;
bkey_for_each_ptr_decode(k.k, ptrs, p, entry)
ret += !p.ptr.cached &&
p.crc.compression_type == BCH_COMPRESSION_TYPE_none;
ret += !p.ptr.cached && !crc_is_compressed(p.crc);
}
return ret;
@ -624,13 +623,24 @@ unsigned bch2_bkey_sectors_compressed(struct bkey_s_c k)
unsigned ret = 0;
bkey_for_each_ptr_decode(k.k, ptrs, p, entry)
if (!p.ptr.cached &&
p.crc.compression_type != BCH_COMPRESSION_TYPE_none)
if (!p.ptr.cached && crc_is_compressed(p.crc))
ret += p.crc.compressed_size;
return ret;
}
bool bch2_bkey_is_incompressible(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;
bkey_for_each_crc(k.k, ptrs, crc, entry)
if (crc.compression_type == BCH_COMPRESSION_TYPE_incompressible)
return true;
return false;
}
bool bch2_check_range_allocated(struct bch_fs *c, struct bpos pos, u64 size,
unsigned nr_replicas)
{

7
fs/bcachefs/extents.h
View File

@ -175,6 +175,12 @@ bch2_extent_crc_unpack(const struct bkey *k, const union bch_extent_crc *crc)
#undef common_fields
}
static inline bool crc_is_compressed(struct bch_extent_crc_unpacked crc)
{
return (crc.compression_type != BCH_COMPRESSION_TYPE_none &&
crc.compression_type != BCH_COMPRESSION_TYPE_incompressible);
}
/* bkey_ptrs: generically over any key type that has ptrs */
struct bkey_ptrs_c {
@ -483,6 +489,7 @@ static inline struct bch_devs_list bch2_bkey_cached_devs(struct bkey_s_c k)
unsigned bch2_bkey_nr_ptrs(struct bkey_s_c);
unsigned bch2_bkey_nr_ptrs_allocated(struct bkey_s_c);
unsigned bch2_bkey_nr_ptrs_fully_allocated(struct bkey_s_c);
bool bch2_bkey_is_incompressible(struct bkey_s_c);
unsigned bch2_bkey_sectors_compressed(struct bkey_s_c);
bool bch2_check_range_allocated(struct bch_fs *, struct bpos, u64, unsigned);
unsigned bch2_bkey_durability(struct bch_fs *, struct bkey_s_c);

42
fs/bcachefs/io.c
View File

@ -562,9 +562,14 @@ static void __bch2_write_index(struct bch_write_op *op)
* particularly want to plumb io_opts all the way through the btree
* update stack right now
*/
for_each_keylist_key(keys, k)
for_each_keylist_key(keys, k) {
bch2_rebalance_add_key(c, bkey_i_to_s_c(k), &op->opts);
if (bch2_bkey_is_incompressible(bkey_i_to_s_c(k)))
bch2_check_set_feature(op->c, BCH_FEATURE_incompressible);
}
if (!bch2_keylist_empty(keys)) {
u64 sectors_start = keylist_sectors(keys);
int ret = op->index_update_fn(op);
@ -786,8 +791,9 @@ static enum prep_encoded_ret {
/* Can we just write the entire extent as is? */
if (op->crc.uncompressed_size == op->crc.live_size &&
op->crc.compressed_size <= wp->sectors_free &&
op->crc.compression_type == op->compression_type) {
if (!op->crc.compression_type &&
(op->crc.compression_type == op->compression_type ||
op->incompressible)) {
if (!crc_is_compressed(op->crc) &&
op->csum_type != op->crc.csum_type &&
bch2_write_rechecksum(c, op, op->csum_type))
return PREP_ENCODED_CHECKSUM_ERR;
@ -799,7 +805,7 @@ static enum prep_encoded_ret {
* If the data is compressed and we couldn't write the entire extent as
* is, we have to decompress it:
*/
if (op->crc.compression_type) {
if (crc_is_compressed(op->crc)) {
struct bch_csum csum;
if (bch2_write_decrypt(op))
@ -910,11 +916,13 @@ static int bch2_write_extent(struct bch_write_op *op, struct write_point *wp,
bch2_csum_type_is_encryption(op->crc.csum_type));
BUG_ON(op->compression_type && !bounce);
crc.compression_type = op->compression_type
? bch2_bio_compress(c, dst, &dst_len, src, &src_len,
op->compression_type)
crc.compression_type = op->incompressible
? BCH_COMPRESSION_TYPE_incompressible
: op->compression_type
? bch2_bio_compress(c, dst, &dst_len, src, &src_len,
op->compression_type)
: 0;
if (!crc.compression_type) {
if (!crc_is_compressed(crc)) {
dst_len = min(dst->bi_iter.bi_size, src->bi_iter.bi_size);
dst_len = min_t(unsigned, dst_len, wp->sectors_free << 9);
@ -943,7 +951,7 @@ static int bch2_write_extent(struct bch_write_op *op, struct write_point *wp,
}
if ((op->flags & BCH_WRITE_DATA_ENCODED) &&
!crc.compression_type &&
!crc_is_compressed(crc) &&
bch2_csum_type_is_encryption(op->crc.csum_type) ==
bch2_csum_type_is_encryption(op->csum_type)) {
/*
@ -1340,6 +1348,7 @@ static void promote_start(struct promote_op *op, struct bch_read_bio *rbio)
static struct promote_op *__promote_alloc(struct bch_fs *c,
enum btree_id btree_id,
struct bkey_s_c k,
struct bpos pos,
struct extent_ptr_decoded *pick,
struct bch_io_opts opts,
@ -1396,8 +1405,7 @@ static struct promote_op *__promote_alloc(struct bch_fs *c,
(struct data_opts) {
.target = opts.promote_target
},
btree_id,
bkey_s_c_null);
btree_id, k);
BUG_ON(ret);
return op;
@ -1439,7 +1447,7 @@ static struct promote_op *promote_alloc(struct bch_fs *c,
k.k->type == KEY_TYPE_reflink_v
? BTREE_ID_REFLINK
: BTREE_ID_EXTENTS,
pos, pick, opts, sectors, rbio);
k, pos, pick, opts, sectors, rbio);
if (!promote)
return NULL;
@ -1703,7 +1711,7 @@ static void bch2_rbio_narrow_crcs(struct bch_read_bio *rbio)
u64 data_offset = rbio->pos.offset - rbio->pick.crc.offset;
int ret;
if (rbio->pick.crc.compression_type)
if (crc_is_compressed(rbio->pick.crc))
return;
bkey_on_stack_init(&new);
@ -1788,7 +1796,7 @@ static void __bch2_read_endio(struct work_struct *work)
crc.offset += rbio->offset_into_extent;
crc.live_size = bvec_iter_sectors(rbio->bvec_iter);
if (crc.compression_type != BCH_COMPRESSION_TYPE_none) {
if (crc_is_compressed(crc)) {
bch2_encrypt_bio(c, crc.csum_type, nonce, src);
if (bch2_bio_uncompress(c, src, dst, dst_iter, crc))
goto decompression_err;
@ -1885,7 +1893,7 @@ static void bch2_read_endio(struct bio *bio)
}
if (rbio->narrow_crcs ||
rbio->pick.crc.compression_type ||
crc_is_compressed(rbio->pick.crc) ||
bch2_csum_type_is_encryption(rbio->pick.crc.csum_type))
context = RBIO_CONTEXT_UNBOUND, wq = system_unbound_wq;
else if (rbio->pick.crc.csum_type)
@ -1996,7 +2004,7 @@ int __bch2_read_extent(struct bch_fs *c, struct bch_read_bio *orig,
EBUG_ON(offset_into_extent + bvec_iter_sectors(iter) > k.k->size);
if (pick.crc.compression_type != BCH_COMPRESSION_TYPE_none ||
if (crc_is_compressed(pick.crc) ||
(pick.crc.csum_type != BCH_CSUM_NONE &&
(bvec_iter_sectors(iter) != pick.crc.uncompressed_size ||
(bch2_csum_type_is_encryption(pick.crc.csum_type) &&
@ -2011,7 +2019,7 @@ int __bch2_read_extent(struct bch_fs *c, struct bch_read_bio *orig,
&rbio, &bounce, &read_full);
if (!read_full) {
EBUG_ON(pick.crc.compression_type);
EBUG_ON(crc_is_compressed(pick.crc));
EBUG_ON(pick.crc.csum_type &&
(bvec_iter_sectors(iter) != pick.crc.uncompressed_size ||
bvec_iter_sectors(iter) != pick.crc.live_size ||

1
fs/bcachefs/io_types.h
View File

@ -107,6 +107,7 @@ struct bch_write_op {
unsigned nr_replicas:4;
unsigned nr_replicas_required:4;
unsigned alloc_reserve:4;
unsigned incompressible:1;
struct bch_devs_list devs_have;
u16 target;

19
fs/bcachefs/move.c
View File

@ -214,6 +214,9 @@ int bch2_migrate_write_init(struct bch_fs *c, struct migrate_write *m,
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 extent_ptr_decoded p;
int ret;
m->btree_id = btree_id;
@ -222,9 +225,14 @@ int bch2_migrate_write_init(struct bch_fs *c, struct migrate_write *m,
m->nr_ptrs_reserved = 0;
bch2_write_op_init(&m->op, c, io_opts);
m->op.compression_type =
bch2_compression_opt_to_type[io_opts.background_compression ?:
io_opts.compression];
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;
@ -264,14 +272,11 @@ int bch2_migrate_write_init(struct bch_fs *c, struct migrate_write *m,
break;
}
case DATA_REWRITE: {
struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(k);
const union bch_extent_entry *entry;
struct extent_ptr_decoded p;
unsigned compressed_sectors = 0;
bkey_for_each_ptr_decode(k.k, ptrs, p, entry)
if (!p.ptr.cached &&
p.crc.compression_type != BCH_COMPRESSION_TYPE_none &&
crc_is_compressed(p.crc) &&
bch2_dev_in_target(c, p.ptr.dev, data_opts.target))
compressed_sectors += p.crc.compressed_size;

3
fs/bcachefs/rebalance.c
View File

@ -30,7 +30,8 @@ static int __bch2_rebalance_pred(struct bch_fs *c,
const union bch_extent_entry *entry;
struct extent_ptr_decoded p;
if (io_opts->background_compression)
if (io_opts->background_compression &&
!bch2_bkey_is_incompressible(k))
bkey_for_each_ptr_decode(k.k, ptrs, p, entry)
if (!p.ptr.cached &&
p.crc.compression_type !=

2
fs/bcachefs/sysfs.c
View File

@ -276,7 +276,7 @@ static ssize_t bch2_compression_stats(struct bch_fs *c, char *buf)
struct extent_ptr_decoded p;
extent_for_each_ptr_decode(e, p, entry) {
if (p.crc.compression_type == BCH_COMPRESSION_TYPE_none) {
if (!crc_is_compressed(p.crc)) {
nr_uncompressed_extents++;
uncompressed_sectors += e.k->size;
} else {