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Changed lfsr_mdir_commit__ to only copy this rbyd

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This saves a bit of stack space in theory, but after the redund block
restructure this amounts to a single word.

But lfsr_mdir_commit__ isn't on the hot path anyways, so this doesn't
even matter...

            code          stack
  before:  30948           2528
  after:   30952 (+0.0%)   2528 (+0.0%)
This commit is contained in:
Christopher Haster
2023-11-26 13:46:12 -06:00
parent c1c51a316a
commit aa79c274a6
1 changed files with 17 additions and 17 deletions
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lfs.c
+17 -17
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@@ -5554,7 +5554,7 @@ static int lfsr_mdir_commit__(lfs_t *lfs, lfsr_mdir_t *mdir,
lfsr_srid_t start_rid, lfsr_srid_t end_rid,
const lfsr_attr_t *attrs, lfs_size_t attr_count) {
// try to append a commit
lfsr_mdir_t mdir_ = *mdir;
lfsr_rbyd_t rbyd_ = mdir->rbyd;
// mark as erased in case of failure
mdir->rbyd.eoff = -1;
for (lfs_size_t i = 0; i < attr_count; i++) {
@@ -5594,7 +5594,7 @@ static int lfsr_mdir_commit__(lfs_t *lfs, lfsr_mdir_t *mdir,
}
// append the attr
err = lfsr_rbyd_appendattr(lfs, &mdir_.rbyd,
err = lfsr_rbyd_appendattr(lfs, &rbyd_,
rid - lfs_smax32(start_rid, 0),
tag, 0, data);
if (err) {
@@ -5615,12 +5615,12 @@ static int lfsr_mdir_commit__(lfs_t *lfs, lfsr_mdir_t *mdir,
//
// it is important that these rbyds share eoff/cksum/etc
//
mdir_.rbyd.trunk = bshrubcommit->bshrub->rbyd_.trunk;
mdir_.rbyd.weight = bshrubcommit->bshrub->rbyd_.weight;
rbyd_.trunk = bshrubcommit->bshrub->rbyd_.trunk;
rbyd_.weight = bshrubcommit->bshrub->rbyd_.weight;
// append any shrub attributes
for (lfs_size_t j = 0; j < bshrubcommit->attr_count; j++) {
int err = lfsr_rbyd_appendattr(lfs, &mdir_.rbyd,
int err = lfsr_rbyd_appendattr(lfs, &rbyd_,
bshrubcommit->attrs[j].rid,
LFSR_TAG_SHRUB | bshrubcommit->attrs[j].tag,
bshrubcommit->attrs[j].delta,
@@ -5631,10 +5631,10 @@ static int lfsr_mdir_commit__(lfs_t *lfs, lfsr_mdir_t *mdir,
}
// revert mdir to main trunk/weight
bshrubcommit->bshrub->rbyd_.trunk = mdir_.rbyd.trunk;
bshrubcommit->bshrub->rbyd_.weight = mdir_.rbyd.weight;
mdir_.rbyd.trunk = mdir->rbyd.trunk;
mdir_.rbyd.weight = mdir->rbyd.weight;
bshrubcommit->bshrub->rbyd_.trunk = rbyd_.trunk;
bshrubcommit->bshrub->rbyd_.weight = rbyd_.weight;
rbyd_.trunk = mdir->rbyd.trunk;
rbyd_.weight = mdir->rbyd.weight;
// lazily encode inlined trunks in case they change underneath
// us due to mdir compactions
@@ -5646,7 +5646,7 @@ static int lfsr_mdir_commit__(lfs_t *lfs, lfsr_mdir_t *mdir,
= (lfsr_bshrub_t*)attrs[i].data.u.buf.buffer;
uint8_t trunk_buf[LFSR_TRUNK_DSIZE];
int err = lfsr_rbyd_appendattr(lfs, &mdir_.rbyd,
int err = lfsr_rbyd_appendattr(lfs, &rbyd_,
rid - lfs_smax32(start_rid, 0),
lfsr_tag_mode(attrs[i].tag) | LFSR_TAG_TRUNK,
attrs[i].delta,
@@ -5663,7 +5663,7 @@ static int lfsr_mdir_commit__(lfs_t *lfs, lfsr_mdir_t *mdir,
} else {
LFS_ASSERT(!lfsr_tag_isinternal(attrs[i].tag));
int err = lfsr_rbyd_appendattr(lfs, &mdir_.rbyd,
int err = lfsr_rbyd_appendattr(lfs, &rbyd_,
rid - lfs_smax32(start_rid, 0),
attrs[i].tag, attrs[i].delta, attrs[i].data);
if (err) {
@@ -5685,11 +5685,11 @@ static int lfsr_mdir_commit__(lfs_t *lfs, lfsr_mdir_t *mdir,
// don't finish the commit if our weight dropped to zero!
//
// If we finish the commit it becomes immediately visibile, but we really
// need to remove this mdir_ from the mtree. Leave the actual remove up to
// need to remove this mdir from the mtree. Leave the actual remove up to
// upper layers.
if (mdir_.rbyd.weight == 0
if (rbyd_.weight == 0
// unless we are an mroot
&& !(mdir_.mid == -1 || lfsr_mdir_cmp(&mdir_, &lfs->mroot) == 0)) {
&& !(mdir->mid == -1 || lfsr_mdir_cmp(mdir, &lfs->mroot) == 0)) {
// mark weight as zero, but note! we can not longer read from this mdir
// as our pcache may get clobbered
mdir->rbyd.weight = 0;
@@ -5698,14 +5698,14 @@ static int lfsr_mdir_commit__(lfs_t *lfs, lfsr_mdir_t *mdir,
// append any gstate?
if (start_rid == -1) {
int err = lfsr_rbyd_appendgdelta(lfs, &mdir_.rbyd);
int err = lfsr_rbyd_appendgdelta(lfs, &rbyd_);
if (err) {
return err;
}
}
// finalize commit
int err = lfsr_rbyd_appendcksum(lfs, &mdir_.rbyd);
int err = lfsr_rbyd_appendcksum(lfs, &rbyd_);
if (err) {
return err;
}
@@ -5715,7 +5715,7 @@ static int lfsr_mdir_commit__(lfs_t *lfs, lfsr_mdir_t *mdir,
lfsr_fs_flushgdelta(lfs);
}
mdir->rbyd = mdir_.rbyd;
mdir->rbyd = rbyd_;
return 0;
}