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Added several more LFS_DEBUG* options

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To help with debugging. These all seem useful, though the exact output
will probably be worth messing around with:

- LFS_DEBUGRBYDFETCHES - Debug every rbyd fetch
- LFS_DEBUGRBYDCOMMITS - Debug every rbyd commit
- LFS_DEBUGBTREEFETCHES - Debug every btree/bshrub fetch (though we
  currently don't fetch bshrubs...)
- LFS_DEBUGBTREECOMMITS - Debug every btree/bshrub commit
- LFS_DEBUGMDIRFETCHES - Debug every mdir fetch
- LFS_DEBUGMDIRCOMMITS - Debug every mdir commit
- LFS_DEBUGALLOCS - Debug every block allocation

Let's see if you can match these to each debug output:

  lfs.c:2942:debug: Fetched rbyd 0xe.d80 w77, eoff 3536, cksum 862283c6
  lfs.c:4233:debug: Committed rbyd 0xe.dd0 w78, eoff 3616, cksum 38ae1347
  lfs.c:4950:debug: Fetched btree 0x9f.806 w2048, cksum 7fb89b1b
  lfs.c:6609:debug: Committed btree 0x9f.806 w2048, cksum 7fb89b1b
  lfs.c:6603:debug: Committed bshrub 0x{0,1}.b06 w1747
  lfs.c:7290:debug: Fetched mdir -1 0x{1,0}.8f w0, cksum 7846be7a
  lfs.c:9022:debug: Committed mdir 0 0x{0,1}.a10 w2, cksum 4d2ccb29
  lfs.c:10083:debug: Allocated block 0x8f, lookahead 125/253/256

Also tweaked LFSR_DEBUGRBYDBALANCE to be a bit more readable when
LFS_DEBUGRBYDFETCHES is enabled, and tweaked the out-of-space error
message to show the same lookahead info as LFS_DEBUGALLOCS:

  lfs.c:10101:error: No more free space (lookahead 0/0/256)
                                                   ^ ^  ^
                             lookahead remaining --' |  |
                             ckpoint remaining ------'  |
                             block count ---------------'

No code changes.
This commit is contained in:
Christopher Haster
2025-01-28 09:06:34 -06:00
parent ad72d252b5
commit 49a737b6a5
2 changed files with 102 additions and 14 deletions
Download Patch File Download Diff File Expand all files Collapse all files
lfs.c
+102 -8
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@@ -2938,6 +2938,17 @@ static int lfsr_rbyd_fetch_(lfs_t *lfs,
rbyd->eoff = -1;
}
#ifdef LFS_DEBUGRBYDFETCHES
LFS_DEBUG("Fetched rbyd 0x%"PRIx32".%"PRIx32" w%"PRId32", "
"eoff %"PRId32", cksum %"PRIx32,
rbyd->blocks[0], lfsr_rbyd_trunk(rbyd),
rbyd->weight,
(lfsr_rbyd_eoff(rbyd) >= lfs->cfg->block_size)
? -1
: (lfs_ssize_t)lfsr_rbyd_eoff(rbyd),
rbyd->cksum);
#endif
// debugging rbyd balance? check that all branches in the rbyd have
// the same height
#ifdef LFS_DEBUGRBYDBALANCE
@@ -2967,10 +2978,11 @@ static int lfsr_rbyd_fetch_(lfs_t *lfs,
min_bheight = (min_bheight) ? lfs_min(min_bheight, bheight) : bheight;
max_bheight = (max_bheight) ? lfs_max(max_bheight, bheight) : bheight;
}
LFS_DEBUG("rbyd 0x%"PRIx32".%"PRIx32": "
LFS_DEBUG("Fetched rbyd 0x%"PRIx32".%"PRIx32" w%"PRId32", "
"height %"PRId32"-%"PRId32", "
"bheight %"PRId32"-%"PRId32,
rbyd->blocks[0], lfsr_rbyd_trunk(rbyd),
rbyd->weight,
min_height, max_height,
min_bheight, max_bheight);
// all branches in the rbyd should have the same bheight
@@ -4216,6 +4228,17 @@ static int lfsr_rbyd_appendcksum_(lfs_t *lfs, lfsr_rbyd_t *rbyd,
| off_;
// revert to canonical checksum
rbyd->cksum = cksum;
#ifdef LFS_DEBUGRBYDCOMMITS
LFS_DEBUG("Committed rbyd 0x%"PRIx32".%"PRIx32" w%"PRId32", "
"eoff %"PRId32", cksum %"PRIx32,
rbyd->blocks[0], lfsr_rbyd_trunk(rbyd),
rbyd->weight,
(lfsr_rbyd_eoff(rbyd) >= lfs->cfg->block_size)
? -1
: (lfs_ssize_t)lfsr_rbyd_eoff(rbyd),
rbyd->cksum);
#endif
return 0;
}
@@ -4916,9 +4939,21 @@ static int lfsr_btree_fetch(lfs_t *lfs, lfsr_btree_t *btree,
lfs_block_t block, lfs_size_t trunk, lfsr_bid_t weight,
uint32_t cksum) {
// btree/branch fetch really are the same once we know the weight
return lfsr_branch_fetch(lfs, btree,
int err = lfsr_branch_fetch(lfs, btree,
block, trunk, weight,
cksum);
if (err) {
return err;
}
#ifdef LFS_DEBUGBTREEFETCHES
LFS_DEBUG("Fetched btree 0x%"PRIx32".%"PRIx32" w%"PRId32", "
"cksum %"PRIx32,
btree->blocks[0], lfsr_rbyd_trunk(btree),
btree->weight,
btree->cksum);
#endif
return 0;
}
static int lfsr_data_fetchbtree(lfs_t *lfs, lfsr_data_t *data,
@@ -5700,6 +5735,13 @@ static int lfsr_btree_commit_(lfs_t *lfs, lfsr_btree_t *btree,
}
LFS_ASSERT(lfsr_rbyd_trunk(btree));
#ifdef LFS_DEBUGBTREECOMMITS
LFS_DEBUG("Committed btree 0x%"PRIx32".%"PRIx32" w%"PRId32", "
"cksum %"PRIx32,
btree->blocks[0], lfsr_rbyd_trunk(btree),
btree->weight,
btree->cksum);
#endif
return 0;
}
@@ -6479,7 +6521,7 @@ static int lfsr_bshrub_commit_(lfs_t *lfs,
LFS_ASSERT(!err || rat_count > 0);
bool alloc = (err == LFS_ERR_RANGE);
// when btree is shrubbed, lfsr_btree_commit_ stops at the root
// when btree is shrubbed, lfsr_btree_commit__ stops at the root
// and returns with pending rats
if (rat_count > 0) {
// we need to prevent our shrub from overflowing our mdir somehow
@@ -6553,11 +6595,24 @@ static int lfsr_bshrub_commit_(lfs_t *lfs,
}
}
LFS_ASSERT(bshrub->u.bshrub.estimate == (lfs_size_t)estimate);
return 0;
}
LFS_ASSERT(lfsr_shrub_trunk(&bshrub->u.bshrub));
#ifdef LFS_DEBUGBTREECOMMITS
if (lfsr_bshrub_isbshrub(mdir, bshrub)) {
LFS_DEBUG("Committed bshrub "
"0x{%"PRIx32",%"PRIx32"}.%"PRIx32" w%"PRId32,
mdir->rbyd.blocks[0], mdir->rbyd.blocks[1],
lfsr_shrub_trunk(&bshrub->u.bshrub),
bshrub->u.bshrub.weight);
} else {
LFS_DEBUG("Committed btree 0x%"PRIx32".%"PRIx32" w%"PRId32", "
"cksum %"PRIx32,
bshrub->u.btree.blocks[0], lfsr_rbyd_trunk(&bshrub->u.btree),
bshrub->u.btree.weight,
bshrub->u.btree.cksum);
}
#endif
return 0;
relocate:;
@@ -6592,6 +6647,15 @@ relocate:;
}
bshrub->u.btree = rbyd_;
LFS_ASSERT(lfsr_rbyd_trunk(&bshrub->u.btree));
#ifdef LFS_DEBUGBTREECOMMITS
LFS_DEBUG("Committed btree 0x%"PRIx32".%"PRIx32" w%"PRId32", "
"cksum %"PRIx32,
bshrub->u.btree.blocks[0], lfsr_rbyd_trunk(&bshrub->u.btree),
bshrub->u.btree.weight,
bshrub->u.btree.cksum);
#endif
return 0;
}
@@ -7222,6 +7286,16 @@ static int lfsr_mdir_fetch(lfs_t *lfs, lfsr_mdir_t *mdir,
mdir->mid = mid;
// keep track of other block for compactions
mdir->rbyd.blocks[1] = blocks[1];
#ifdef LFS_DEBUGMDIRFETCHES
LFS_DEBUG("Fetched mdir %"PRId32" "
"0x{%"PRIx32",%"PRIx32"}.%"PRIx32" w%"PRId32", "
"cksum %"PRIx32,
mdir->mid >> lfs->mdir_bits,
mdir->rbyd.blocks[0], mdir->rbyd.blocks[1],
lfsr_rbyd_trunk(&mdir->rbyd),
mdir->rbyd.weight,
mdir->rbyd.cksum);
#endif
return 0;
}
@@ -8944,6 +9018,16 @@ static int lfsr_mdir_commit(lfs_t *lfs, lfsr_mdir_t *mdir,
lfsr_mdir_sync(&lfs->mroot, &mroot_);
lfs->mtree = mtree_;
#ifdef LFS_DEBUGMDIRCOMMITS
LFS_DEBUG("Committed mdir %"PRId32" "
"0x{%"PRIx32",%"PRIx32"}.%"PRIx32" w%"PRId32", "
"cksum %"PRIx32,
mdir->mid >> lfs->mdir_bits,
mdir->rbyd.blocks[0], mdir->rbyd.blocks[1],
lfsr_rbyd_trunk(&mdir->rbyd),
mdir->rbyd.weight,
mdir->rbyd.cksum);
#endif
return 0;
failed:;
@@ -9995,6 +10079,14 @@ static lfs_sblock_t lfs_alloc(lfs_t *lfs, bool erase) {
lfs_alloc_inc(lfs);
lfs_alloc_findfree(lfs);
#ifdef LFS_DEBUGALLOCS
LFS_DEBUG("Allocated block 0x%"PRIx32", "
"lookahead %"PRId32"/%"PRId32"/%"PRId32,
block,
lfs->lookahead.size,
lfs->lookahead.ckpoint,
lfs->cfg->block_count);
#endif
return block;
}
@@ -10006,9 +10098,11 @@ static lfs_sblock_t lfs_alloc(lfs_t *lfs, bool erase) {
// the filesystem as out of storage
//
if (lfs->lookahead.ckpoint <= 0) {
LFS_ERROR("No more free space (0x%"PRIx32")",
(lfs->lookahead.window + lfs->lookahead.off)
% lfs->block_count);
LFS_ERROR("No more free space "
"(lookahead %"PRId32"/%"PRId32"/%"PRId32")",
lfs->lookahead.size,
lfs->lookahead.ckpoint,
lfs->cfg->block_count);
return LFS_ERR_NOSPC;
}