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fscrypt: move body of fscrypt_prepare_setattr() out-of-line

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In preparation for reducing the visibility of fscrypt_require_key() by
moving it to fscrypt_private.h, move the call to it from
fscrypt_prepare_setattr() to an out-of-line function.

Reviewed-by: Andreas Dilger <adilger@dilger.ca>
Link: https://lore.kernel.org/r/20201203022041.230976-7-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@google.com>
This commit is contained in:
Eric Biggers 2020-12-02 18:20:38 -08:00
parent ec0caa974c
commit 7622350e5e
2 changed files with 17 additions and 2 deletions
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8
fs/crypto/hooks.c
View File

@ -120,6 +120,14 @@ int __fscrypt_prepare_readdir(struct inode *dir)
}
EXPORT_SYMBOL_GPL(__fscrypt_prepare_readdir);
int __fscrypt_prepare_setattr(struct dentry *dentry, struct iattr *attr)
{
if (attr->ia_valid & ATTR_SIZE)
return fscrypt_require_key(d_inode(dentry));
return 0;
}
EXPORT_SYMBOL_GPL(__fscrypt_prepare_setattr);
/**
* fscrypt_prepare_setflags() - prepare to change flags with FS_IOC_SETFLAGS
* @inode: the inode on which flags are being changed

11
include/linux/fscrypt.h
View File

@ -243,6 +243,7 @@ int __fscrypt_prepare_rename(struct inode *old_dir, struct dentry *old_dentry,
int __fscrypt_prepare_lookup(struct inode *dir, struct dentry *dentry,
struct fscrypt_name *fname);
int __fscrypt_prepare_readdir(struct inode *dir);
int __fscrypt_prepare_setattr(struct dentry *dentry, struct iattr *attr);
int fscrypt_prepare_setflags(struct inode *inode,
unsigned int oldflags, unsigned int flags);
int fscrypt_prepare_symlink(struct inode *dir, const char *target,
@ -543,6 +544,12 @@ static inline int __fscrypt_prepare_readdir(struct inode *dir)
return -EOPNOTSUPP;
}
static inline int __fscrypt_prepare_setattr(struct dentry *dentry,
struct iattr *attr)
{
return -EOPNOTSUPP;
}
static inline int fscrypt_prepare_setflags(struct inode *inode,
unsigned int oldflags,
unsigned int flags)
@ -840,8 +847,8 @@ static inline int fscrypt_prepare_readdir(struct inode *dir)
static inline int fscrypt_prepare_setattr(struct dentry *dentry,
struct iattr *attr)
{
if (attr->ia_valid & ATTR_SIZE)
return fscrypt_require_key(d_inode(dentry));
if (IS_ENCRYPTED(d_inode(dentry)))
return __fscrypt_prepare_setattr(dentry, attr);
return 0;
}