These patches are all on top of fscrypt's development branch Ext4 and F2FS currently both support casefolding and encryption, but not at the same time. These patches aim to rectify that. I moved the identical casefolding dcache operations for ext4 and f2fs into fs/unicode, as all filesystems using casefolded names will want them. I've also adjust fscrypt to not set it's d_revalidate operation during it's prepare lookup, instead having the calling filesystem set it up. This is done to that the filesystem may have it's own dentry_operations. For Ext4, since the hash for encrypted casefolded directory names cannot be computed without the key, we need to store the hash on disk. We only do so for encrypted and casefolded directories to avoid on disk format changes. Previously encryption and casefolding could not be on the same filesystem, and we're relaxing that requirement. F2fs is a bit more straightforward since it already stores hashes on disk. I've updated the related tools with just enough to enable the feature. I still need to adjust ext4's fsck's, although without access to the keys, neither fsck will be able to verify the hashes of casefolded and encrypted names. v6 changes: Went back to using dentry_operations for casefolding. Provided standard implementations in fs/unicode, avoiding extra allocation in d_hash op. Moved fscrypt d_ops setting to be filesystem's responsibility to maintain compatibility with casefolding and overlayfs if casefolding is not used fixes some f2fs error handling v4-5: patches submitted on fscrypt v3 changes: fscrypt patch only creates hash key if it will be needed. Rebased on top of fscrypt branch, reconstified match functions in ext4/f2fs v2 changes: fscrypt moved to separate thread to rebase on fscrypt dev branch addressed feedback, plus some minor fixes Daniel Rosenberg (5): unicode: Add standard casefolded d_ops fscrypt: Have filesystems handle their d_ops f2fs: Handle casefolding with Encryption ext4: Hande casefolding with encryption ext4: Optimize match for casefolded encrypted dirs Documentation/filesystems/ext4/directory.rst | 27 ++ fs/crypto/fname.c | 7 +- fs/crypto/fscrypt_private.h | 1 - fs/crypto/hooks.c | 1 - fs/ext4/dir.c | 102 +++--- fs/ext4/ext4.h | 86 +++-- fs/ext4/hash.c | 26 +- fs/ext4/ialloc.c | 5 +- fs/ext4/inline.c | 41 ++- fs/ext4/namei.c | 325 ++++++++++++------- fs/ext4/super.c | 21 +- fs/f2fs/dir.c | 151 +++++---- fs/f2fs/f2fs.h | 16 +- fs/f2fs/hash.c | 25 +- fs/f2fs/inline.c | 9 +- fs/f2fs/namei.c | 1 + fs/f2fs/super.c | 17 +- fs/f2fs/sysfs.c | 8 +- fs/ubifs/dir.c | 18 + fs/unicode/utf8-core.c | 61 ++++ include/linux/fs.h | 10 + include/linux/fscrypt.h | 6 +- include/linux/unicode.h | 17 + 23 files changed, 644 insertions(+), 337 deletions(-) -- 2.25.0.341.g760bfbb309-goog
