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Merge pull request #76 from ARMmbed/fix-corrupt-read

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Add handling for corrupt as initial state of blocks
This commit is contained in:
Christopher Haster
2018-07-17 20:32:33 -05:00
committed by GitHub
parent 16318d003f 041e90a1ca
commit 11ad3a2414
1 changed files with 11 additions and 2 deletions
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13
lfs.c
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@@ -417,11 +417,14 @@ static int lfs_dir_alloc(lfs_t *lfs, lfs_dir_t *dir) {
// rather than clobbering one of the blocks we just pretend
// the revision may be valid
int err = lfs_bd_read(lfs, dir->pair[0], 0, &dir->d.rev, 4);
dir->d.rev = lfs_fromle32(dir->d.rev);
if (err) {
if (err && err != LFS_ERR_CORRUPT) {
return err;
}
if (err != LFS_ERR_CORRUPT) {
dir->d.rev = lfs_fromle32(dir->d.rev);
}
// set defaults
dir->d.rev += 1;
dir->d.size = sizeof(dir->d)+4;
@@ -445,6 +448,9 @@ static int lfs_dir_fetch(lfs_t *lfs,
int err = lfs_bd_read(lfs, tpair[i], 0, &test, sizeof(test));
lfs_dir_fromle32(&test);
if (err) {
if (err == LFS_ERR_CORRUPT) {
continue;
}
return err;
}
@@ -464,6 +470,9 @@ static int lfs_dir_fetch(lfs_t *lfs,
err = lfs_bd_crc(lfs, tpair[i], sizeof(test),
(0x7fffffff & test.size) - sizeof(test), &crc);
if (err) {
if (err == LFS_ERR_CORRUPT) {
continue;
}
return err;
}