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FROMLIST: fscrypt: Have filesystems handle their d_ops

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This shifts the responsibility of setting up dentry operations from
fscrypt to the individual filesystems, allowing them to have their own
operations while still setting fscrypt's d_revalidate as appropriate.

Also added helper function to libfs to unify ext4 and f2fs
implementations.

Signed-off-by: Daniel Rosenberg <[email protected]>
Test: Boots, /data/media is case insensitive
Bug: 138322712
Link: https://lore.kernel.org/linux-f2fs-devel/[email protected]/T/#t
Change-Id: Iaf77f8c5961ecf22e22478701ab0b7fe2025225d
This commit is contained in:
Daniel Rosenberg 2020-01-27 20:04:40 -08:00 • committed by Alistair Delva
commit d16d9c0046
14 changed files with 78 additions and 32 deletions
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7
fs/crypto/fname.c
View file

@ -543,7 +543,7 @@ EXPORT_SYMBOL_GPL(fscrypt_fname_siphash);
* Validate dentries in encrypted directories to make sure we aren't potentially
* caching stale dentries after a key has been added.
*/
static int fscrypt_d_revalidate(struct dentry *dentry, unsigned int flags)
int fscrypt_d_revalidate(struct dentry *dentry, unsigned int flags)
{
struct dentry *dir;
int err;
@ -582,7 +582,4 @@ static int fscrypt_d_revalidate(struct dentry *dentry, unsigned int flags)
return valid;
}
const struct dentry_operations fscrypt_d_ops = {
.d_revalidate = fscrypt_d_revalidate,
};
EXPORT_SYMBOL(fscrypt_d_revalidate);

1
fs/crypto/fscrypt_private.h
View file

@ -275,7 +275,6 @@ extern int fscrypt_fname_encrypt(const struct inode *inode,
extern bool fscrypt_fname_encrypted_size(const struct inode *inode,
u32 orig_len, u32 max_len,
u32 *encrypted_len_ret);
extern const struct dentry_operations fscrypt_d_ops;
/* hkdf.c */

1
fs/crypto/hooks.c
View file

@ -118,7 +118,6 @@ int __fscrypt_prepare_lookup(struct inode *dir, struct dentry *dentry,
spin_lock(&dentry->d_lock);
dentry->d_flags |= DCACHE_ENCRYPTED_NAME;
spin_unlock(&dentry->d_lock);
d_set_d_op(dentry, &fscrypt_d_ops);
}
return err;
}