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t: Tweaked mutation flags, made sure zombie flag is cleared

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lfsr_mdir_fixorphans always ends up setting the zombie flag, which is a
bit annoying. If we don't clear the zombie flag, lfsr_remove/lfsr_rename
may cause repeated mids during traversal, which probably won't break
anything, but isn't great...

Code changes:

           code          stack
  before: 35480           2680
  after:  35484 (+0.0%)   2680 (+0.0%)
This commit is contained in:
Christopher Haster
2024-07-09 00:05:14 -05:00
parent 0e2a909148
commit f191d25dcc
1 changed files with 15 additions and 13 deletions
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lfs.c
+15 -13
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@@ -8652,7 +8652,7 @@ static int lfsr_mtree_gc(lfs_t *lfs, lfsr_traversal_t *t,
// lfsr_mtree_gc to work correctly
LFS_ASSERT(lfsr_omdir_isopen(lfs, &t->o.o));
again:;
dropped:;
lfsr_tag_t tag;
lfsr_bptr_t bptr;
int err = lfsr_mtree_traverse(lfs, t,
@@ -8661,8 +8661,8 @@ again:;
return err;
}
// keep track of dirty flag before mutation
bool dirty = t->o.o.flags & LFS_F_DIRTY;
// keep track of flags before mutation
uint16_t flags = t->o.o.flags;
// mkconsistencing mdirs?
if (lfsr_t_ismkconsistent(t->o.o.flags)
@@ -8674,16 +8674,18 @@ again:;
return err;
}
// make sure we clear any zombie flags
t->o.o.flags &= ~LFS_F_ZOMBIE;
// did this drop our mdir?
if (mdir->mid != -1 && mdir->rbyd.weight == 0) {
t->o.o.flags &= ~LFS_F_ZOMBIE;
t->o.o.state = LFSR_TSTATE_MDIRS;
// downgrade any new dirty flags
t->o.o.flags |= (t->o.o.flags & LFS_F_DIRTY) ? LFS_F_MUTATED : 0;
t->o.o.flags &= ~LFS_F_DIRTY;
t->o.o.flags |= (dirty) ? LFS_F_DIRTY : 0;
goto again;
t->o.o.flags = (t->o.o.flags & ~LFS_F_DIRTY)
| (flags & LFS_F_DIRTY);
goto dropped;
}
}
@@ -8790,8 +8792,8 @@ again:;
// downgrade any new dirty flags
t->o.o.flags |= (t->o.o.flags & LFS_F_DIRTY) ? LFS_F_MUTATED : 0;
t->o.o.flags &= ~LFS_F_DIRTY;
t->o.o.flags |= (dirty) ? LFS_F_DIRTY : 0;
t->o.o.flags = (t->o.o.flags & ~LFS_F_DIRTY)
| (flags & LFS_F_DIRTY);
if (tag_) {
*tag_ = tag;
@@ -12931,8 +12933,8 @@ int lfsr_traversal_read(lfs_t *lfs, lfsr_traversal_t *t,
lfsr_mid_rid(lfs, lfs->grm.mids[0]));
}
// keep track of dirty flag before mutation
bool dirty = t->o.o.flags & LFS_F_DIRTY;
// keep track of flags before mutation
uint16_t flags = t->o.o.flags;
int err = lfsr_fs_fixgrm(lfs);
if (err) {
@@ -12941,8 +12943,8 @@ int lfsr_traversal_read(lfs_t *lfs, lfsr_traversal_t *t,
// downgrade any new dirty flags
t->o.o.flags |= (t->o.o.flags & LFS_F_DIRTY) ? LFS_F_MUTATED : 0;
t->o.o.flags &= ~LFS_F_DIRTY;
t->o.o.flags |= (dirty) ? LFS_F_DIRTY : 0;
t->o.o.flags = (t->o.o.flags & ~LFS_F_DIRTY)
| (flags & LFS_F_DIRTY);
}
while (true) {