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bcachefs: Update sysfs compression_stats for snapshots

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- BTREE_ITER_ALL_SNAPSHOTS flag is required here
 - change it to also walk the reflink btree
 - change it to accumulate stats for all pointers in an extent
 - change it to account for incompressible data

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
This commit is contained in:
Kent Overstreet
2021-12-27 19:58:12 -05:00
committed by Kent Overstreet
parent 13f914ecb9
commit 862bfd5062
1 changed files with 56 additions and 27 deletions
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83
fs/bcachefs/sysfs.c
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@@ -266,8 +266,12 @@ static int bch2_compression_stats_to_text(struct printbuf *out, struct bch_fs *c
struct btree_trans trans;
struct btree_iter iter;
struct bkey_s_c k;
u64 nr_uncompressed_extents = 0, uncompressed_sectors = 0,
enum btree_id id;
u64 nr_uncompressed_extents = 0,
nr_compressed_extents = 0,
nr_incompressible_extents = 0,
uncompressed_sectors = 0,
incompressible_sectors = 0,
compressed_sectors_compressed = 0,
compressed_sectors_uncompressed = 0;
int ret;
@@ -277,47 +281,72 @@ static int bch2_compression_stats_to_text(struct printbuf *out, struct bch_fs *c
bch2_trans_init(&trans, c, 0, 0);
for_each_btree_key(&trans, iter, BTREE_ID_extents, POS_MIN, 0, k, ret)
if (k.k->type == KEY_TYPE_extent) {
struct bkey_s_c_extent e = bkey_s_c_to_extent(k);
for (id = 0; id < BTREE_ID_NR; id++) {
if (!((1U << id) & BTREE_ID_HAS_PTRS))
continue;
for_each_btree_key(&trans, iter, id, POS_MIN,
BTREE_ITER_ALL_SNAPSHOTS, k, ret) {
struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(k);
const union bch_extent_entry *entry;
struct extent_ptr_decoded p;
bool compressed = false, uncompressed = false, incompressible = false;
extent_for_each_ptr_decode(e, p, entry) {
if (!crc_is_compressed(p.crc)) {
nr_uncompressed_extents++;
uncompressed_sectors += e.k->size;
} else {
nr_compressed_extents++;
bkey_for_each_ptr_decode(k.k, ptrs, p, entry) {
switch (p.crc.compression_type) {
case BCH_COMPRESSION_TYPE_none:
uncompressed = true;
uncompressed_sectors += k.k->size;
break;
case BCH_COMPRESSION_TYPE_incompressible:
incompressible = true;
incompressible_sectors += k.k->size;
break;
default:
compressed_sectors_compressed +=
p.crc.compressed_size;
compressed_sectors_uncompressed +=
p.crc.uncompressed_size;
compressed = true;
break;
}
/* only looking at the first ptr */
break;
}
if (incompressible)
nr_incompressible_extents++;
else if (uncompressed)
nr_uncompressed_extents++;
else if (compressed)
nr_compressed_extents++;
}
bch2_trans_iter_exit(&trans, &iter);
bch2_trans_iter_exit(&trans, &iter);
}
bch2_trans_exit(&trans);
if (ret)
return ret;
pr_buf(out,
"uncompressed data:\n"
" nr extents: %llu\n"
" size (bytes): %llu\n"
"compressed data:\n"
" nr extents: %llu\n"
" compressed size (bytes): %llu\n"
" uncompressed size (bytes): %llu\n",
nr_uncompressed_extents,
uncompressed_sectors << 9,
nr_compressed_extents,
compressed_sectors_compressed << 9,
compressed_sectors_uncompressed << 9);
pr_buf(out, "uncompressed:\n");
pr_buf(out, " nr extents: %llu\n", nr_uncompressed_extents);
pr_buf(out, " size: ");
bch2_hprint(out, uncompressed_sectors << 9);
pr_buf(out, "\n");
pr_buf(out, "compressed:\n");
pr_buf(out, " nr extents: %llu\n", nr_compressed_extents);
pr_buf(out, " compressed size: ");
bch2_hprint(out, compressed_sectors_compressed << 9);
pr_buf(out, "\n");
pr_buf(out, " uncompressed size: ");
bch2_hprint(out, compressed_sectors_uncompressed << 9);
pr_buf(out, "\n");
pr_buf(out, "incompressible:\n");
pr_buf(out, " nr extents: %llu\n", nr_incompressible_extents);
pr_buf(out, " size: ");
bch2_hprint(out, incompressible_sectors << 9);
pr_buf(out, "\n");
return 0;
}