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WIP so close

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This commit is contained in:
Christopher Haster
2020-02-28 06:03:59 -06:00
parent f7bc22937a
commit 3ee291de59
1 changed files with 120 additions and 102 deletions
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222
lfs.c
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@@ -1186,27 +1186,34 @@ nextname:
}
// TODO compact npair -> dir->tail?
lfs_stag_t ttag = 0;
npair[0] = dir->tail[0];
npair[1] = dir->tail[1];
if (!dir->split) {
// npair[0] = dir->branch[0];
// npair[1] = dir->branch[1];
ttag = lfs_dir_get(lfs, dir,
LFS_MKTAG(0x7ff, 0, 0),
LFS_MKTAG(LFS_TYPE_BRANCH, 0, sizeof(npair)),
npair);
if (ttag < 0 && ttag != LFS_ERR_NOENT) {
return ttag;
}
lfs_pair_fromle32(npair);
assert(ttag == LFS_ERR_NOENT || lfs_pair_cmp(npair, dir->branch) == 0);
}
// ttag may be NOENT or may be marked null explicitly
if (ttag == LFS_ERR_NOENT || lfs_pair_isnull(npair)) {
if (lfs_pair_isnull(dir->branch)) {
return LFS_ERR_NOENT;
}
npair[0] = dir->branch[0];
npair[1] = dir->branch[1];
// lfs_stag_t ttag = 0;
// npair[0] = dir->tail[0];
// npair[1] = dir->tail[1];
// if (!dir->split) {
//// npair[0] = dir->branch[0];
//// npair[1] = dir->branch[1];
// ttag = lfs_dir_get(lfs, dir,
// LFS_MKTAG(0x7ff, 0, 0),
// LFS_MKTAG(LFS_TYPE_BRANCH, 0, sizeof(npair)),
// npair);
// if (ttag < 0 && ttag != LFS_ERR_NOENT) {
// return ttag;
// }
// lfs_pair_fromle32(npair);
// assert(ttag == LFS_ERR_NOENT || lfs_pair_cmp(npair, dir->branch) == 0);
// }
//
// // ttag may be NOENT or may be marked null explicitly
// if (ttag == LFS_ERR_NOENT || lfs_pair_isnull(npair)) {
// return LFS_ERR_NOENT;
// }
}
// to next name
@@ -1418,29 +1425,29 @@ static int lfs_dir_alloc(lfs_t *lfs, lfs_mdir_t *dir) {
return 0;
}
static int lfs_dir_drop(lfs_t *lfs, lfs_mdir_t *dir, lfs_mdir_t *tail) {
static int lfs_dir_droptail(lfs_t *lfs, lfs_mdir_t *dir, lfs_mdir_t *tail) {
// steal state
int err = lfs_dir_getgstate(lfs, tail, &lfs->gdelta);
if (err) {
return err;
}
// steal tail's branch
lfs_block_t tbpair[2];
lfs_stag_t tbtag = lfs_dir_get(lfs, tail,
LFS_MKTAG(0x7ff, 0, 0),
LFS_MKTAG(LFS_TYPE_BRANCH, 0, 8), tbpair);
if (tbtag < 0 && tbtag != LFS_ERR_NOENT) {
return tbtag;
}
// // steal tail's branch
// lfs_block_t tbpair[2];
// lfs_stag_t tbtag = lfs_dir_get(lfs, tail,
// LFS_MKTAG(0x7ff, 0, 0),
// LFS_MKTAG(LFS_TYPE_BRANCH, 0, 8), tbpair);
// if (tbtag < 0 && tbtag != LFS_ERR_NOENT) {
// return tbtag;
// }
// steal tail's tail
lfs_pair_tole32(tail->tail);
err = lfs_dir_commit(lfs, dir, LFS_MKATTRS(
{LFS_MKTAG(LFS_TYPE_TAIL + tail->split, 0x3ff, 8), tail->tail},
{LFS_MKTAG_IF_ELSE(tbtag != LFS_ERR_NOENT,
LFS_TYPE_BRANCH, 0x3ff, sizeof(tbpair),
LFS_TYPE_BRANCH, 0x3ff, 0x3ff), tbpair}));
{LFS_MKTAG(LFS_TYPE_TAIL + tail->split, 0x3ff, 8), tail->tail}));
// {LFS_MKTAG_IF_ELSE(tbtag != LFS_ERR_NOENT,
// LFS_TYPE_BRANCH, 0x3ff, sizeof(tbpair),
// LFS_TYPE_BRANCH, 0x3ff, 0x3ff), tbpair}));
lfs_pair_fromle32(tail->tail);
if (err) {
return err;
@@ -1459,13 +1466,15 @@ static int lfs_dir_dropbranch(lfs_t *lfs,
}
// steal branch's branch
lfs_block_t bbpair[2];
lfs_stag_t bbtag = lfs_dir_get(lfs, branch,
LFS_MKTAG(0x7ff, 0, 0),
LFS_MKTAG(LFS_TYPE_BRANCH, 0, 8), bbpair);
if (bbtag < 0 && bbtag != LFS_ERR_NOENT) {
return bbtag;
}
dir->branch[0] = branch->branch[0];
dir->branch[1] = branch->branch[1];
// lfs_block_t bbpair[2];
// lfs_stag_t bbtag = lfs_dir_get(lfs, branch,
// LFS_MKTAG(0x7ff, 0, 0),
// LFS_MKTAG(LFS_TYPE_BRANCH, 0, 8), bbpair);
// if (bbtag < 0 && bbtag != LFS_ERR_NOENT) {
// return bbtag;
// }
// TODO need mlist?
// TODO endianness?
@@ -1473,11 +1482,12 @@ static int lfs_dir_dropbranch(lfs_t *lfs,
lfs_fs_preporphans(lfs, +1);
// delete branch
lfs_block_t branch_[2] = {dir->branch[0], dir->branch[1]}; // TODO need this?
err = lfs_dir_commit(lfs, dir, LFS_MKATTRS(
//{LFS_MKTAG(LFS_TYPE_TAIL + branch->split, 0x3ff, 8), branch->tail},
{LFS_MKTAG_IF_ELSE(bbtag != LFS_ERR_NOENT,
LFS_TYPE_BRANCH, 0x3ff, sizeof(bbpair),
LFS_TYPE_BRANCH, 0x3ff, 0x3ff), bbpair}));
{LFS_MKTAG_IF_ELSE(!lfs_pair_isnull(branch_), // bbtag != LFS_ERR_NOENT,
LFS_TYPE_BRANCH, 0x3ff, sizeof(branch_),
LFS_TYPE_BRANCH, 0x3ff, 0x3ff), branch_}));
if (err) {
return err;
}
@@ -1488,8 +1498,9 @@ static int lfs_dir_dropbranch(lfs_t *lfs,
return err;
}
// TODO move this out?
lfs_fs_preporphans(lfs, -1);
err = lfs_dir_drop(lfs, dir, branch);
err = lfs_dir_droptail(lfs, dir, branch);
if (err) {
return err;
}
@@ -2007,7 +2018,7 @@ static int lfs_dir_commit(lfs_t *lfs, lfs_mdir_t *dir,
// TODO should this actually be handled in _lfs_remove_??
//printf("hmm1 %d %d\n", err, pdir.split);
if (err != LFS_ERR_NOENT && pdir.split) {
err = lfs_dir_drop(lfs, &pdir, dir); // TODO drop needs to handle branches
err = lfs_dir_droptail(lfs, &pdir, dir); // TODO drop needs to handle branches
if (err) {
*dir = olddir;
return err;
@@ -2386,28 +2397,33 @@ int lfs_dir_read(lfs_t *lfs, lfs_dir_t *dir, struct lfs_info *info) {
while (true) {
if (dir->id == dir->m.count) {
lfs_stag_t ttag = 0;
lfs_block_t npair[2] = {dir->m.tail[0], dir->m.tail[1]};
// TODO remove mlist from mkdir!
if (!dir->m.split) {
ttag = lfs_dir_get(lfs, &dir->m,
LFS_MKTAG(0x7ff, 0, 0),
LFS_MKTAG(LFS_TYPE_BRANCH, 0, sizeof(npair)),
npair);
if (ttag < 0 && ttag != LFS_ERR_NOENT) {
return ttag;
}
lfs_pair_fromle32(npair);
}
// lfs_stag_t ttag = 0;
// lfs_block_t npair[2] = {dir->m.tail[0], dir->m.tail[1]};
// // TODO remove mlist from mkdir!
// if (!dir->m.split) {
// ttag = lfs_dir_get(lfs, &dir->m,
// LFS_MKTAG(0x7ff, 0, 0),
// LFS_MKTAG(LFS_TYPE_BRANCH, 0, sizeof(npair)),
// npair);
// if (ttag < 0 && ttag != LFS_ERR_NOENT) {
// return ttag;
// }
// lfs_pair_fromle32(npair);
// }
// ttag may be NOENT or may be marked null explicitly
if (ttag == LFS_ERR_NOENT || lfs_pair_isnull(npair)) {
//if (ttag == LFS_ERR_NOENT || lfs_pair_isnull(npair)) { // TODO rm me
if (lfs_pair_isnull(dir->m.branch)) {
LFS_TRACE("lfs_dir_read -> %d", false);
return false;
}
// fetch next dir
int err = lfs_dir_fetch(lfs, &dir->m, npair);
// TODO copy out branch in lfs_dir_fetch?
lfs_block_t branch[2] = {dir->m.branch[0], dir->m.branch[1]};
int err = lfs_dir_fetch(lfs, &dir->m, branch);
if (err) {
LFS_TRACE("lfs_dir_read -> %d", err);
return err;
@@ -2457,26 +2473,28 @@ int lfs_dir_seek(lfs_t *lfs, lfs_dir_t *dir, lfs_off_t off) {
off -= diff;
if (dir->id == dir->m.count) {
lfs_stag_t ttag = 0;
lfs_block_t npair[2] = {dir->m.tail[0], dir->m.tail[1]}; // TODO reuse dir tail?
if (!dir->m.split) {
ttag = lfs_dir_get(lfs, &dir->m,
LFS_MKTAG(0x7ff, 0, 0),
LFS_MKTAG(LFS_TYPE_BRANCH, 0, sizeof(npair)),
npair);
if (ttag < 0 && ttag != LFS_ERR_NOENT) {
return ttag;
}
lfs_pair_fromle32(npair);
}
// lfs_stag_t ttag = 0;
// lfs_block_t npair[2] = {dir->m.tail[0], dir->m.tail[1]}; // TODO reuse dir tail?
// if (!dir->m.split) {
// ttag = lfs_dir_get(lfs, &dir->m,
// LFS_MKTAG(0x7ff, 0, 0),
// LFS_MKTAG(LFS_TYPE_BRANCH, 0, sizeof(npair)),
// npair);
// if (ttag < 0 && ttag != LFS_ERR_NOENT) {
// return ttag;
// }
// lfs_pair_fromle32(npair);
// }
// ttag may be NOENT or may be marked null explicitly
if (ttag == LFS_ERR_NOENT || lfs_pair_isnull(npair)) {
//if (ttag == LFS_ERR_NOENT || lfs_pair_isnull(npair)) { // TODO rm me
if (lfs_pair_isnull(dir->m.branch)) {
LFS_TRACE("lfs_dir_seek -> %d", LFS_ERR_INVAL);
return LFS_ERR_INVAL;
}
err = lfs_dir_fetch(lfs, &dir->m, npair);
lfs_block_t branch[2] = {dir->m.branch[0], dir->m.branch[1]};
err = lfs_dir_fetch(lfs, &dir->m, branch);
if (err) {
LFS_TRACE("lfs_dir_seek -> %d", err);
return err;
@@ -3542,7 +3560,7 @@ int lfs_remove(lfs_t *lfs, const char *path) {
return err;
}
err = lfs_dir_drop(lfs, &cwd, &dir.m);
err = lfs_dir_droptail(lfs, &cwd, &dir.m);
if (err) {
LFS_TRACE("lfs_remove -> %d", err);
return err;
@@ -3687,7 +3705,7 @@ int lfs_rename(lfs_t *lfs, const char *oldpath, const char *newpath) {
return err;
}
err = lfs_dir_drop(lfs, &newcwd, &prevdir.m);
err = lfs_dir_droptail(lfs, &newcwd, &prevdir.m);
if (err) {
LFS_TRACE("lfs_rename -> %d", err);
return err;
@@ -4516,7 +4534,7 @@ static int lfs_fs_deorphan(lfs_t *lfs) {
LFS_DEBUG("Fixing orphan %"PRIx32" %"PRIx32,
pdir.tail[0], pdir.tail[1]);
err = lfs_dir_drop(lfs, &pdir, &dir);
err = lfs_dir_droptail(lfs, &pdir, &dir);
if (err) {
return err;
}
@@ -4525,32 +4543,32 @@ static int lfs_fs_deorphan(lfs_t *lfs) {
continue;
}
lfs_block_t pair[2];
lfs_stag_t res = lfs_dir_get(lfs, &parent,
LFS_MKTAG(0x7ff, 0x3ff, 0), tag, pair);
if (res < 0) {
return res;
}
lfs_pair_fromle32(pair);
if (!lfs_pair_sync(pair, pdir.tail)) {
assert(false);
// we have desynced
LFS_DEBUG("Fixing half-orphan "
"%"PRIx32" %"PRIx32" -> %"PRIx32" %"PRIx32,
pdir.tail[0], pdir.tail[1], pair[0], pair[1]);
lfs_pair_tole32(pair);
err = lfs_dir_commit(lfs, &pdir, LFS_MKATTRS(
{LFS_MKTAG(LFS_TYPE_SOFTTAIL, 0x3ff, 8), pair}));
lfs_pair_fromle32(pair);
if (err) {
return err;
}
// refetch tail
continue;
}
// lfs_block_t pair[2];
// lfs_stag_t res = lfs_dir_get(lfs, &parent,
// LFS_MKTAG(0x7ff, 0x3ff, 0), tag, pair);
// if (res < 0) {
// return res;
// }
// lfs_pair_fromle32(pair);
//
// if (!lfs_pair_sync(pair, pdir.tail)) {
// assert(false);
// // we have desynced
// LFS_DEBUG("Fixing half-orphan "
// "%"PRIx32" %"PRIx32" -> %"PRIx32" %"PRIx32,
// pdir.tail[0], pdir.tail[1], pair[0], pair[1]);
//
// lfs_pair_tole32(pair);
// err = lfs_dir_commit(lfs, &pdir, LFS_MKATTRS(
// {LFS_MKTAG(LFS_TYPE_SOFTTAIL, 0x3ff, 8), pair}));
// lfs_pair_fromle32(pair);
// if (err) {
// return err;
// }
//
// // refetch tail
// continue;
// }
}
pdir = dir;