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Heavily reworked lfsr_mdir_commit, split into more mid-level functions

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Originally, the intention of this rework was to make it possible to
shrub the mtree, i.e. allow an mshrub, i.e. inline the root rbyd of the
mtree to be inlined in the mroot.

This would allow small mtrees, 2, 3, etc mdirs, to save a block that
would be needed for the mtree's root.

But as the mshrub was progressing, minor problems kept unfolding, and
ultimately I've decided to shelve the idea of mshrubs for now. They add
quite a bit of complexity for relatively little gain:

- bshrubs are just complicated to update. They require a call to
  lfsr_mdir_commit to update the inlined-root, which is a bit of a
  problem when your mshrub needs to be updated inside lfsr_mdir_commit,
  and your system disallows recursion...

  Recursion _can_ be avoided by separate bshrub commit variants that go
  through either lfsr_mdir_commit or lfsr_mdir_commit_, but this
  complicates things and requires some code duplication, weakening the
  value of reusing the bshrub data-structure.

- It's not always possible to compact the mshrub's backing mroot when
  we need to modify the mshrub.

  If an mroot becomes full and needs to split, for example, we need to
  allocate the new mdirs, update the (new) mshrub, and then commit
  everything into the mroot when we compact. But the "update the (new)
  mshrub" step can't be done until after we compact, because the mroot
  is by definition full.

  This _can_ also be worked around, by building an attr list containing
  all of the mshrub changes, and committing the mshrub/mroot changes in
  the same transaction, but this complicates things and increases the
  stack cost for the current hot-path.

- Every shrub needs a configurable shrub size, and the mshrub is no
  exception. This adds another config option and complicates shared
  shrub eviction code.

- The value for mshrubs is not actually that great.

  Unlike file bshrubs, there's only one mshrub in the filesystem, and
  I'm not sure there's a situation where a filesystem has >1 mdirs and
  the exact number of allocated blocks is critical.

And this complexity is reflected in code cost and robustness, not to
mention developer time. I think for littlefs this is just not worth
doing. At least not now.

We can always introduce mshrubs in a backwards compatible manner if
needed.

---

But this rework did lead to better code organization around mdir commits
and how they update the mtree/mroot, so I'm keeping those changes.

In general lfsr_mdir_commit has been broken up into mtree/mroot specific
functions that _do_ propagate in-device changes. Any commit to the mroot
changes the on-disk state of the filesystem anyways, so the mroot commit
_must_ be the last thing lfsr_mdir_commit does.

This leads to some duplicated updates, but that's not really a problem.

Here's the new call graph inside lfsr_mdir_commit:

                lfsr_mdir_commit
         .---------' | | | '-----------------.
         v           | | '-----------------. |
  lfsr_mtree_commit  | '--------.          | |
         '---------. |          |          | |
                   v v          |          | |
             lfsr_mroot_commit  |          | |
                   | '--------. |          | |
                   |          v v          | |
                   |    lfsr_mdir_commit_  | |
                   | .--------' '--------. | |
                   | | .-----------------|-' |
                   v v v                 v   v
              lfsr_mdir_commit__    lfsr_mdir_compact__

This rework didn't really impact code/stack that much. It added a bit of
code, but saved a bit of RAM. The real value is that the narrower-scoped
functions contain more focused logic:

            code          stack
  before:  30780           2504
  after:   31096 (+1.0%)   2480 (-1.0%)
This commit is contained in:
Christopher Haster
2023-11-24 22:24:14 -06:00
parent a8f54fb1e0
commit 30a9a62620
2 changed files with 568 additions and 455 deletions
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lfs.c
+498 -385
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File diff suppressed because it is too large Load Diff
tests/test_mtree.toml
+70 -70
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@@ -81,7 +81,7 @@ code = '''
for (lfs_size_t i = 0; i < N; i++) {
// force mroot to compact
lfs.mroot.u.rbyd.eoff = BLOCK_SIZE;
lfs.mroot.u.rbyd.eoff = -1;
lfsr_mdir_commit(&lfs, &lfs.mroot, LFSR_ATTRS(
LFSR_ATTR(-1, UATTR(i), 0, BUF(&alphas[i % 26], 1)))) => 0;
@@ -178,7 +178,7 @@ code = '''
LFSR_ATTR(0, REG, +1, BUF(buffer, SIZE)))) => 0;
// force mroot to compact
lfs.mroot.u.rbyd.eoff = BLOCK_SIZE;
lfs.mroot.u.rbyd.eoff = -1;
lfsr_mdir_commit(&lfs, &lfs.mroot, NULL, 0) => 0;
// assert mdir was unininlined correctly
@@ -251,7 +251,7 @@ code = '''
LFSR_ATTR(1, REG, +1, BUF(buffer, SIZE)))) => 0;
// force mroot to compact
lfs.mroot.u.rbyd.eoff = BLOCK_SIZE;
lfs.mroot.u.rbyd.eoff = -1;
lfsr_mdir_commit(&lfs, &lfs.mroot, NULL, 0) => 0;
// assert mdirs were unininlined and split
@@ -324,7 +324,7 @@ code = '''
LFSR_ATTR(0, REG, +1, BUF(buffer, SIZE)))) => 0;
// force mroot to compact
lfs.mroot.u.rbyd.eoff = BLOCK_SIZE;
lfs.mroot.u.rbyd.eoff = -1;
lfsr_mdir_commit(&lfs, &lfs.mroot, NULL, 0) => 0;
// assert mdir was unininlined correctly
@@ -342,7 +342,7 @@ code = '''
LFSR_ATTR(mdir.mid, REG, +1, BUF(buffer, SIZE)))) => 0;
// force mdir to compact
mdir.u.rbyd.eoff = BLOCK_SIZE;
mdir.u.rbyd.eoff = -1;
lfsr_mdir_commit(&lfs, &mdir, NULL, 0) => 0;
// assert mdir was split correctly
@@ -633,7 +633,7 @@ code = '''
LFSR_ATTR(0, REG, +1, BUF(buffer, SIZE)))) => 0;
// force mroot to compact
lfs.mroot.u.rbyd.eoff = BLOCK_SIZE;
lfs.mroot.u.rbyd.eoff = -1;
lfsr_mdir_commit(&lfs, &lfs.mroot, NULL, 0) => 0;
// assert mdir was unininlined correctly
@@ -702,7 +702,7 @@ code = '''
LFSR_ATTR(0, REG, +1, BUF(buffer, SIZE)))) => 0;
// force mroot to compact
lfs.mroot.u.rbyd.eoff = BLOCK_SIZE;
lfs.mroot.u.rbyd.eoff = -1;
lfsr_mdir_commit(&lfs, &lfs.mroot, NULL, 0) => 0;
// assert mdir was unininlined correctly
@@ -716,7 +716,7 @@ code = '''
assert(mdir.u.m.weight == 1);
// force mdir to compact while we're removing
mdir.u.rbyd.eoff = BLOCK_SIZE;
mdir.u.rbyd.eoff = -1;
lfsr_mdir_commit(&lfs, &mdir, LFSR_ATTRS(
LFSR_ATTR(0, RM, -1, NULL))) => 0;
@@ -774,7 +774,7 @@ code = '''
LFSR_ATTR(0, REG, +1, BUF(buffer, SIZE)))) => 0;
// force mroot to compact
lfs.mroot.u.rbyd.eoff = BLOCK_SIZE;
lfs.mroot.u.rbyd.eoff = -1;
// remove the entry as we compact, forcing the mdir to be dropped
lfsr_mdir_commit(&lfs, &lfs.mroot, LFSR_ATTRS(
@@ -833,7 +833,7 @@ code = '''
LFSR_ATTR(1, REG, +1, BUF(buffer, SIZE)))) => 0;
// force mroot to compact
lfs.mroot.u.rbyd.eoff = BLOCK_SIZE;
lfs.mroot.u.rbyd.eoff = -1;
// remove the left entry as we compact, forcing the left
// mdir to be dropped
@@ -900,7 +900,7 @@ code = '''
LFSR_ATTR(1, REG, +1, BUF(buffer, SIZE)))) => 0;
// force mroot to compact
lfs.mroot.u.rbyd.eoff = BLOCK_SIZE;
lfs.mroot.u.rbyd.eoff = -1;
// remove the right entry as we compact, forcing the right mdir
// to be dropped
@@ -967,7 +967,7 @@ code = '''
LFSR_ATTR(1, REG, +1, BUF(buffer, SIZE)))) => 0;
// force mroot to compact
lfs.mroot.u.rbyd.eoff = BLOCK_SIZE;
lfs.mroot.u.rbyd.eoff = -1;
// remove both entries as we compact, forcing both mdirs to be dropped
lfsr_mdir_commit(&lfs, &lfs.mroot, LFSR_ATTRS(
@@ -1017,7 +1017,7 @@ code = '''
LFSR_ATTR(0, REG, +1, BUF(buffer, SIZE)))) => 0;
// force mroot to compact
lfs.mroot.u.rbyd.eoff = BLOCK_SIZE;
lfs.mroot.u.rbyd.eoff = -1;
lfsr_mdir_commit(&lfs, &lfs.mroot, NULL, 0) => 0;
// assert mdir was unininlined correctly
@@ -1035,7 +1035,7 @@ code = '''
LFSR_ATTR(mdir.mid, REG, +1, BUF(buffer, SIZE)))) => 0;
// force mdir to compact
mdir.u.rbyd.eoff = BLOCK_SIZE;
mdir.u.rbyd.eoff = -1;
// remove the left entry as we compact, forcing the left
// mdir to be dropped
@@ -1112,7 +1112,7 @@ code = '''
LFSR_ATTR(0, REG, +1, BUF(buffer, SIZE)))) => 0;
// force mroot to compact
lfs.mroot.u.rbyd.eoff = BLOCK_SIZE;
lfs.mroot.u.rbyd.eoff = -1;
lfsr_mdir_commit(&lfs, &lfs.mroot, NULL, 0) => 0;
// assert mdir was unininlined correctly
@@ -1130,7 +1130,7 @@ code = '''
LFSR_ATTR(mdir.mid, REG, +1, BUF(buffer, SIZE)))) => 0;
// force mdir to compact
mdir.u.rbyd.eoff = BLOCK_SIZE;
mdir.u.rbyd.eoff = -1;
// remove the right entry as we compact, forcing the right
// mdir to be dropped
@@ -1206,7 +1206,7 @@ code = '''
LFSR_ATTR(0, REG, +1, BUF(buffer, SIZE)))) => 0;
// force mroot to compact
lfs.mroot.u.rbyd.eoff = BLOCK_SIZE;
lfs.mroot.u.rbyd.eoff = -1;
lfsr_mdir_commit(&lfs, &lfs.mroot, NULL, 0) => 0;
// assert mdir was unininlined correctly
@@ -1224,7 +1224,7 @@ code = '''
LFSR_ATTR(mdir.mid, REG, +1, BUF(buffer, SIZE)))) => 0;
// force mdir to compact
mdir.u.rbyd.eoff = BLOCK_SIZE;
mdir.u.rbyd.eoff = -1;
// remove both entries as we compact, forcing both mdirs to be dropped
lfsr_mdir_commit(&lfs, &mdir, LFSR_ATTRS(
@@ -1667,7 +1667,7 @@ code = '''
LFSR_ATTR(0, REG, +1, BUF(buffer, SIZE)))) => 0;
// force mroot to compact
lfs.mroot.u.rbyd.eoff = BLOCK_SIZE;
lfs.mroot.u.rbyd.eoff = -1;
lfsr_mdir_commit(&lfs, &lfs.mroot, NULL, 0) => 0;
// assert mtree has one mdir
@@ -1682,9 +1682,9 @@ code = '''
lfsr_mdir_t old_mdir = mdir;
mdir.u.rbyd.eoff = BLOCK_SIZE;
mdir.u.rbyd.eoff = -1;
lfsr_mdir_commit(&lfs, &mdir, NULL, 0) => 0;
mdir.u.rbyd.eoff = BLOCK_SIZE;
mdir.u.rbyd.eoff = -1;
memset(buffer, 'c', SIZE);
lfsr_mdir_commit(&lfs, &mdir, LFSR_ATTRS(
LFSR_ATTR(mdir.mid, REG, 0, BUF(buffer, SIZE)))) => 0;
@@ -1761,7 +1761,7 @@ code = '''
LFSR_ATTR(1, REG, +1, BUF(buffer, SIZE)))) => 0;
// force mroot to compact
lfs.mroot.u.rbyd.eoff = BLOCK_SIZE;
lfs.mroot.u.rbyd.eoff = -1;
lfsr_mdir_commit(&lfs, &lfs.mroot, NULL, 0) => 0;
// assert mdirs were unininlined and split
@@ -1776,9 +1776,9 @@ code = '''
lfsr_mdir_t old_mdir = mdir;
mdir.u.rbyd.eoff = BLOCK_SIZE;
mdir.u.rbyd.eoff = -1;
lfsr_mdir_commit(&lfs, &mdir, NULL, 0) => 0;
mdir.u.rbyd.eoff = BLOCK_SIZE;
mdir.u.rbyd.eoff = -1;
memset(buffer, 'c', SIZE);
lfsr_mdir_commit(&lfs, &mdir, LFSR_ATTRS(
LFSR_ATTR(mdir.mid, REG, 0, BUF(buffer, SIZE)))) => 0;
@@ -1855,7 +1855,7 @@ code = '''
LFSR_ATTR(1, REG, +1, BUF(buffer, SIZE)))) => 0;
// force mroot to compact
lfs.mroot.u.rbyd.eoff = BLOCK_SIZE;
lfs.mroot.u.rbyd.eoff = -1;
lfsr_mdir_commit(&lfs, &lfs.mroot, NULL, 0) => 0;
// assert mdirs were unininlined and split
@@ -1870,9 +1870,9 @@ code = '''
lfsr_mdir_t old_mdir = mdir;
mdir.u.rbyd.eoff = BLOCK_SIZE;
mdir.u.rbyd.eoff = -1;
lfsr_mdir_commit(&lfs, &mdir, NULL, 0) => 0;
mdir.u.rbyd.eoff = BLOCK_SIZE;
mdir.u.rbyd.eoff = -1;
memset(buffer, 'c', SIZE);
lfsr_mdir_commit(&lfs, &mdir, LFSR_ATTRS(
LFSR_ATTR(mdir.mid, REG, 0, BUF(buffer, SIZE)))) => 0;
@@ -1947,9 +1947,9 @@ code = '''
// force mroot to compact twice, this should extend the mroot
lfsr_mdir_t old_mroot = lfs.mroot;
lfs.mroot.u.rbyd.eoff = BLOCK_SIZE;
lfs.mroot.u.rbyd.eoff = -1;
lfsr_mdir_commit(&lfs, &lfs.mroot, NULL, 0) => 0;
lfs.mroot.u.rbyd.eoff = BLOCK_SIZE;
lfs.mroot.u.rbyd.eoff = -1;
memset(buffer, 'b', SIZE);
lfsr_mdir_commit(&lfs, &lfs.mroot, LFSR_ATTRS(
LFSR_ATTR(-1, UATTR(1), 0, BUF(buffer, SIZE)))) => 0;
@@ -2007,10 +2007,10 @@ code = '''
lfsr_mdir_t old_mroot = lfs.mroot;
for (int i = 0; i < 4; i++) {
lfs.mroot.u.rbyd.eoff = BLOCK_SIZE;
lfs.mroot.u.rbyd.eoff = -1;
lfsr_mdir_commit(&lfs, &lfs.mroot, NULL, 0) => 0;
}
lfs.mroot.u.rbyd.eoff = BLOCK_SIZE;
lfs.mroot.u.rbyd.eoff = -1;
memset(buffer, 'b', SIZE);
lfsr_mdir_commit(&lfs, &lfs.mroot, LFSR_ATTRS(
LFSR_ATTR(-1, UATTR(1), 0, BUF(buffer, SIZE)))) => 0;
@@ -2064,9 +2064,9 @@ code = '''
// force mroot to compact twice, this should extend the mroot
lfsr_mdir_t old_mroot = lfs.mroot;
lfs.mroot.u.rbyd.eoff = BLOCK_SIZE;
lfs.mroot.u.rbyd.eoff = -1;
lfsr_mdir_commit(&lfs, &lfs.mroot, NULL, 0) => 0;
lfs.mroot.u.rbyd.eoff = BLOCK_SIZE;
lfs.mroot.u.rbyd.eoff = -1;
lfsr_mdir_commit(&lfs, &lfs.mroot, NULL, 0) => 0;
// assert we relocated
@@ -2075,9 +2075,9 @@ code = '''
// force mroot to compact twice again, this should relocate the mroot
old_mroot = lfs.mroot;
lfs.mroot.u.rbyd.eoff = BLOCK_SIZE;
lfs.mroot.u.rbyd.eoff = -1;
lfsr_mdir_commit(&lfs, &lfs.mroot, NULL, 0) => 0;
lfs.mroot.u.rbyd.eoff = BLOCK_SIZE;
lfs.mroot.u.rbyd.eoff = -1;
memset(buffer, 'b', SIZE);
lfsr_mdir_commit(&lfs, &lfs.mroot, LFSR_ATTRS(
LFSR_ATTR(-1, UATTR(1), 0, BUF(buffer, SIZE)))) => 0;
@@ -2134,7 +2134,7 @@ code = '''
LFSR_ATTR(0, REG, +1, BUF(buffer, SIZE)))) => 0;
// force mroot to compact
lfs.mroot.u.rbyd.eoff = BLOCK_SIZE;
lfs.mroot.u.rbyd.eoff = -1;
lfsr_mdir_commit(&lfs, &lfs.mroot, NULL, 0) => 0;
// assert mtree has one mdir
@@ -2144,7 +2144,7 @@ code = '''
// setup mroot to need to compact, this should trigger a relocation when
// we relocate the mdir below
lfs.mroot.u.rbyd.eoff = BLOCK_SIZE;
lfs.mroot.u.rbyd.eoff = -1;
lfsr_mdir_t old_mroot = lfs.mroot;
// force mdir to compact twice, this should relocate
@@ -2154,9 +2154,9 @@ code = '''
lfsr_mdir_t old_mdir = mdir;
mdir.u.rbyd.eoff = BLOCK_SIZE;
mdir.u.rbyd.eoff = -1;
lfsr_mdir_commit(&lfs, &mdir, NULL, 0) => 0;
mdir.u.rbyd.eoff = BLOCK_SIZE;
mdir.u.rbyd.eoff = -1;
memset(buffer, 'c', SIZE);
lfsr_mdir_commit(&lfs, &mdir, LFSR_ATTRS(
LFSR_ATTR(mdir.mid, REG, 0, BUF(buffer, SIZE)))) => 0;
@@ -2239,7 +2239,7 @@ code = '''
LFSR_ATTR(0, REG, +1, BUF(buffer, SIZE)))) => 0;
// force mroot to compact
lfs.mroot.u.rbyd.eoff = BLOCK_SIZE;
lfs.mroot.u.rbyd.eoff = -1;
lfsr_mdir_commit(&lfs, &lfs.mroot, NULL, 0) => 0;
// assert mdir was unininlined correctly
@@ -2249,7 +2249,7 @@ code = '''
// setup mroot to need to compact, this should trigger a relocation when
// we relocate the mdir below
lfs.mroot.u.rbyd.eoff = BLOCK_SIZE;
lfs.mroot.u.rbyd.eoff = -1;
lfsr_mdir_t old_mroot = lfs.mroot;
// now add another large entry to the mdir, forcing a split
@@ -2262,7 +2262,7 @@ code = '''
LFSR_ATTR(mdir.mid, REG, +1, BUF(buffer, SIZE)))) => 0;
// force mdir to compact
mdir.u.rbyd.eoff = BLOCK_SIZE;
mdir.u.rbyd.eoff = -1;
lfsr_mdir_commit(&lfs, &mdir, NULL, 0) => 0;
// assert mdir was split correctly
@@ -2352,7 +2352,7 @@ code = '''
LFSR_ATTR(0, REG, +1, BUF(buffer, SIZE)))) => 0;
// force mroot to compact
lfs.mroot.u.rbyd.eoff = BLOCK_SIZE;
lfs.mroot.u.rbyd.eoff = -1;
lfsr_mdir_commit(&lfs, &lfs.mroot, NULL, 0) => 0;
// assert mdir was unininlined correctly
@@ -2362,7 +2362,7 @@ code = '''
// setup mroot to need to compact, this should trigger a relocation when
// we relocate the mdir below
lfs.mroot.u.rbyd.eoff = BLOCK_SIZE;
lfs.mroot.u.rbyd.eoff = -1;
lfsr_mdir_t old_mroot = lfs.mroot;
// remove the entry, forcing the mdir to be dropped
@@ -2425,7 +2425,7 @@ code = '''
// force mroot to compact once, so the second compact below will trigger
// a relocation
lfs.mroot.u.rbyd.eoff = BLOCK_SIZE;
lfs.mroot.u.rbyd.eoff = -1;
lfsr_mdir_commit(&lfs, &lfs.mroot, NULL, 0) => 0;
// prepare mroot with a large attr so the next entry can not fit
@@ -2441,7 +2441,7 @@ code = '''
// force mroot to compact, this should trigger a relocation
lfsr_mdir_t old_mroot = lfs.mroot;
lfs.mroot.u.rbyd.eoff = BLOCK_SIZE;
lfs.mroot.u.rbyd.eoff = -1;
lfsr_mdir_commit(&lfs, &lfs.mroot, NULL, 0) => 0;
// assert mdir was unininlined correctly
@@ -2513,7 +2513,7 @@ code = '''
// force mroot to compact once, so the second compact below will trigger
// a relocation
lfs.mroot.u.rbyd.eoff = BLOCK_SIZE;
lfs.mroot.u.rbyd.eoff = -1;
lfsr_mdir_commit(&lfs, &lfs.mroot, NULL, 0) => 0;
// create 2 large entries that needs to be uninlined and split
@@ -2528,7 +2528,7 @@ code = '''
// force mroot to compact, this should trigger a relocation
lfsr_mdir_t old_mroot = lfs.mroot;
lfs.mroot.u.rbyd.eoff = BLOCK_SIZE;
lfs.mroot.u.rbyd.eoff = -1;
lfsr_mdir_commit(&lfs, &lfs.mroot, NULL, 0) => 0;
// assert mdirs were unininlined and split
@@ -2913,7 +2913,7 @@ code = '''
LFSR_ATTR(1, REG, +1, BUF(buffer, SIZE)))) => 0;
// force mroot to compact
lfs.mroot.u.rbyd.eoff = BLOCK_SIZE;
lfs.mroot.u.rbyd.eoff = -1;
lfsr_mdir_commit(&lfs, &lfs.mroot, NULL, 0) => 0;
// assert mdir was unininlined correctly
@@ -2992,7 +2992,7 @@ code = '''
LFSR_ATTR(2, REG, +1, BUF(buffer, SIZE)))) => 0;
// force mroot to compact
lfs.mroot.u.rbyd.eoff = BLOCK_SIZE;
lfs.mroot.u.rbyd.eoff = -1;
lfsr_mdir_commit(&lfs, &lfs.mroot, NULL, 0) => 0;
// assert mdirs were unininlined and split
@@ -3053,7 +3053,7 @@ code = '''
LFSR_ATTR(0, REG, +1, BUF(buffer, SIZE)))) => 0;
// force mroot to compact
lfs.mroot.u.rbyd.eoff = BLOCK_SIZE;
lfs.mroot.u.rbyd.eoff = -1;
lfsr_mdir_commit(&lfs, &lfs.mroot, NULL, 0) => 0;
// assert mdir was unininlined correctly
@@ -3090,7 +3090,7 @@ code = '''
LFSR_ATTR(mdir.mid, REG, +1, BUF(buffer, SIZE)))) => 0;
// force mdir to compact
mdir.u.rbyd.eoff = BLOCK_SIZE;
mdir.u.rbyd.eoff = -1;
lfsr_mdir_commit(&lfs, &mdir, NULL, 0) => 0;
// assert mdir was split correctly
@@ -3169,9 +3169,9 @@ code = '''
// force mroot to compact twice, this should extend the mroot
lfsr_mdir_t old_mroot = lfs.mroot;
lfs.mroot.u.rbyd.eoff = BLOCK_SIZE;
lfs.mroot.u.rbyd.eoff = -1;
lfsr_mdir_commit(&lfs, &lfs.mroot, NULL, 0) => 0;
lfs.mroot.u.rbyd.eoff = BLOCK_SIZE;
lfs.mroot.u.rbyd.eoff = -1;
memset(buffer, 'b', SIZE);
lfsr_mdir_commit(&lfs, &lfs.mroot, LFSR_ATTRS(
LFSR_ATTR(-1, UATTR(1), 0, BUF(buffer, SIZE)))) => 0;
@@ -3223,7 +3223,7 @@ code = '''
LFSR_ATTR(0, REG, +1, BUF(buffer, SIZE)))) => 0;
// force mroot to compact
lfs.mroot.u.rbyd.eoff = BLOCK_SIZE;
lfs.mroot.u.rbyd.eoff = -1;
lfsr_mdir_commit(&lfs, &lfs.mroot, NULL, 0) => 0;
// assert mdir was unininlined correctly
@@ -3256,9 +3256,9 @@ code = '''
// force mdir to compact twice, this should relocate
lfsr_mdir_t old_mdir = mdir;
mdir.u.rbyd.eoff = BLOCK_SIZE;
mdir.u.rbyd.eoff = -1;
lfsr_mdir_commit(&lfs, &mdir, NULL, 0) => 0;
mdir.u.rbyd.eoff = BLOCK_SIZE;
mdir.u.rbyd.eoff = -1;
memset(buffer, 'e', SIZE);
lfsr_mdir_commit(&lfs, &mdir, LFSR_ATTRS(
LFSR_ATTR(1, REG, 0, BUF(buffer, SIZE)))) => 0;
@@ -3317,7 +3317,7 @@ code = '''
LFSR_ATTR(1, REG, +1, BUF(buffer, SIZE)))) => 0;
// force mroot to compact
lfs.mroot.u.rbyd.eoff = BLOCK_SIZE;
lfs.mroot.u.rbyd.eoff = -1;
lfsr_mdir_commit(&lfs, &lfs.mroot, NULL, 0) => 0;
// we should now have 2 mdirs
@@ -3332,7 +3332,7 @@ code = '''
LFSR_ATTR(mdir.mid, REG, +1, BUF(buffer, SIZE)))) => 0;
// force mdir to compact
mdir.u.rbyd.eoff = BLOCK_SIZE;
mdir.u.rbyd.eoff = -1;
lfsr_mdir_commit(&lfs, &mdir, NULL, 0) => 0;
// we should now have 3 mdirs
@@ -3363,7 +3363,7 @@ code = '''
LFSR_ATTR(mdir.mid, REG, +1, BUF(buffer, SIZE)))) => 0;
// force mdir to compact
mdir.u.rbyd.eoff = BLOCK_SIZE;
mdir.u.rbyd.eoff = -1;
lfsr_mdir_commit(&lfs, &mdir, NULL, 0) => 0;
// we should now have 4 mdirs
@@ -3410,7 +3410,7 @@ code = '''
LFSR_ATTR(1, REG, +1, BUF(buffer, SIZE)))) => 0;
// force mroot to compact
lfs.mroot.u.rbyd.eoff = BLOCK_SIZE;
lfs.mroot.u.rbyd.eoff = -1;
lfsr_mdir_commit(&lfs, &lfs.mroot, NULL, 0) => 0;
// we should now have 2 mdirs
@@ -3425,7 +3425,7 @@ code = '''
LFSR_ATTR(mdir.mid, REG, +1, BUF(buffer, SIZE)))) => 0;
// force mdir to compact
mdir.u.rbyd.eoff = BLOCK_SIZE;
mdir.u.rbyd.eoff = -1;
lfsr_mdir_commit(&lfs, &mdir, NULL, 0) => 0;
// we should now have 3 mdirs
@@ -3591,7 +3591,7 @@ code = '''
LFSR_ATTR(0, REG, +1, BUF(buffer, SIZE)))) => 0;
// force mroot to compact
lfs.mroot.u.rbyd.eoff = BLOCK_SIZE;
lfs.mroot.u.rbyd.eoff = -1;
lfsr_mdir_commit(&lfs, &lfs.mroot, NULL, 0) => 0;
// assert mdir was unininlined correctly
@@ -3715,7 +3715,7 @@ code = '''
LFSR_ATTR(1, REG, +1, BUF(buffer, SIZE)))) => 0;
// force mroot to compact
lfs.mroot.u.rbyd.eoff = BLOCK_SIZE;
lfs.mroot.u.rbyd.eoff = -1;
lfsr_mdir_commit(&lfs, &lfs.mroot, NULL, 0) => 0;
// assert mdirs were unininlined and split
@@ -3842,9 +3842,9 @@ code = '''
// force mroot to compact twice, this should extend the mroot
lfsr_mdir_t old_mroot = lfs.mroot;
lfs.mroot.u.rbyd.eoff = BLOCK_SIZE;
lfs.mroot.u.rbyd.eoff = -1;
lfsr_mdir_commit(&lfs, &lfs.mroot, NULL, 0) => 0;
lfs.mroot.u.rbyd.eoff = BLOCK_SIZE;
lfs.mroot.u.rbyd.eoff = -1;
memset(buffer, 'b', SIZE);
lfsr_mdir_commit(&lfs, &lfs.mroot, LFSR_ATTRS(
LFSR_ATTR(-1, UATTR(1), 0, BUF(buffer, SIZE)))) => 0;
@@ -4325,9 +4325,9 @@ code = '''
// force mroot to compact twice, this should extend the mroot
lfsr_mdir_t old_mroot = lfs.mroot;
lfs.mroot.u.rbyd.eoff = BLOCK_SIZE;
lfs.mroot.u.rbyd.eoff = -1;
lfsr_mdir_commit(&lfs, &lfs.mroot, NULL, 0) => 0;
lfs.mroot.u.rbyd.eoff = BLOCK_SIZE;
lfs.mroot.u.rbyd.eoff = -1;
memset(buffer, 'b', SIZE);
lfsr_mdir_commit(&lfs, &lfs.mroot, LFSR_ATTRS(
LFSR_ATTR(-1, UATTR(1), 0, BUF(buffer, SIZE)))) => 0;
@@ -4380,10 +4380,10 @@ code = '''
lfsr_mdir_t old_mroot = lfs.mroot;
for (int i = 0; i < 4; i++) {
lfs.mroot.u.rbyd.eoff = BLOCK_SIZE;
lfs.mroot.u.rbyd.eoff = -1;
lfsr_mdir_commit(&lfs, &lfs.mroot, NULL, 0) => 0;
}
lfs.mroot.u.rbyd.eoff = BLOCK_SIZE;
lfs.mroot.u.rbyd.eoff = -1;
memset(buffer, 'b', SIZE);
lfsr_mdir_commit(&lfs, &lfs.mroot, LFSR_ATTRS(
LFSR_ATTR(-1, UATTR(1), 0, BUF(buffer, SIZE)))) => 0;