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Implemented lfsr_rename

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Only simple tests right now, but the theory is sound.

This mainly required the addition of the fancy in-device move attribute,
which copies all tags associated with an rid from one rbyd to another in
a single transaction.

This is a carryover from the previous littlefs implementation, though it
is easier to implement here since it is effectively a range query on the
rbyd tree, which trees are really good at. This was intentional.

Oh and I suppose this also required implementing lfsr_rename, which has
a few corner cases to watch out for.

It is nice that both lfsr_remove and lfsr_rename can rely on
lfsr_fs_fixgrm to finish all of the removes, which wasn't previously
reasonable due to the overhead of deorphaning.
This commit is contained in:
Christopher Haster
2023-07-23 14:03:05 -05:00
parent e4ba43dd5f
commit ee37f8c7a6
3 changed files with 574 additions and 43 deletions
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lfs.h
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@@ -566,6 +566,7 @@ int lfsr_remove(lfs_t *lfs, const char *path);
//
// Returns a negative error code on failure.
int lfs_rename(lfs_t *lfs, const char *oldpath, const char *newpath);
int lfsr_rename(lfs_t *lfs, const char *old_path, const char *new_path);
#endif
// Find info about a file or directory