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| author | Eric Biggers <ebiggers@google.com> | 2020-01-20 14:32:00 -0800 |
|---|---|---|
| committer | Eric Biggers <ebiggers@google.com> | 2020-01-22 14:49:56 -0800 |
| commit | aec992aab890b2dece2c5c95dbd6953aeecd45cb (patch) | |
| tree | e4886bc5a4b5d1e8f653455f866017ac0d0f637a | |
| parent | f0d07a98a070bb5e443df19c3aa55693cbca9341 (diff) | |
| download | linux-aec992aab890b2dece2c5c95dbd6953aeecd45cb.tar.bz2 | |
ubifs: allow both hash and disk name to be provided in no-key names
In order to support a new dirhash method that is a secret-keyed hash
over the plaintext filenames (which will be used by encrypted+casefolded
directories on ext4 and f2fs), fscrypt will be switching to a new no-key
name format that always encodes the dirhash in the name.
UBIFS isn't happy with this because it has assertions that verify that
either the hash or the disk name is provided, not both.
Change it to use the disk name if one is provided, even if a hash is
available too; else use the hash.
Link: https://lore.kernel.org/r/20200120223201.241390-6-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@google.com>
| -rw-r--r-- | fs/ubifs/dir.c | 4 | ||||
| -rw-r--r-- | fs/ubifs/journal.c | 4 | ||||
| -rw-r--r-- | fs/ubifs/key.h | 1 |
3 files changed, 3 insertions, 6 deletions
diff --git a/fs/ubifs/dir.c b/fs/ubifs/dir.c index 5f937226976a..ef85ec167a84 100644 --- a/fs/ubifs/dir.c +++ b/fs/ubifs/dir.c @@ -225,9 +225,7 @@ static struct dentry *ubifs_lookup(struct inode *dir, struct dentry *dentry, goto done; } - if (nm.hash) { - ubifs_assert(c, fname_len(&nm) == 0); - ubifs_assert(c, fname_name(&nm) == NULL); + if (fname_name(&nm) == NULL) { if (nm.hash & ~UBIFS_S_KEY_HASH_MASK) goto done; /* ENOENT */ dent_key_init_hash(c, &key, dir->i_ino, nm.hash); diff --git a/fs/ubifs/journal.c b/fs/ubifs/journal.c index a38e18d3ef1d..3bf8b1fda9d7 100644 --- a/fs/ubifs/journal.c +++ b/fs/ubifs/journal.c @@ -588,7 +588,7 @@ int ubifs_jnl_update(struct ubifs_info *c, const struct inode *dir, if (!xent) { dent->ch.node_type = UBIFS_DENT_NODE; - if (nm->hash) + if (fname_name(nm) == NULL) dent_key_init_hash(c, &dent_key, dir->i_ino, nm->hash); else dent_key_init(c, &dent_key, dir->i_ino, nm); @@ -646,7 +646,7 @@ int ubifs_jnl_update(struct ubifs_info *c, const struct inode *dir, ubifs_add_auth_dirt(c, lnum); if (deletion) { - if (nm->hash) + if (fname_name(nm) == NULL) err = ubifs_tnc_remove_dh(c, &dent_key, nm->minor_hash); else err = ubifs_tnc_remove_nm(c, &dent_key, nm); diff --git a/fs/ubifs/key.h b/fs/ubifs/key.h index afa704ff5ca0..8142d9d6fe5d 100644 --- a/fs/ubifs/key.h +++ b/fs/ubifs/key.h @@ -150,7 +150,6 @@ static inline void dent_key_init(const struct ubifs_info *c, uint32_t hash = c->key_hash(fname_name(nm), fname_len(nm)); ubifs_assert(c, !(hash & ~UBIFS_S_KEY_HASH_MASK)); - ubifs_assert(c, !nm->hash && !nm->minor_hash); key->u32[0] = inum; key->u32[1] = hash | (UBIFS_DENT_KEY << UBIFS_S_KEY_HASH_BITS); } |