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PATH: usr / src / linux-headers-5.4.0-216 / include / linux

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * fscrypt.h: declarations for per-file encryption
 *
 * Filesystems that implement per-file encryption must include this header
 * file.
 *
 * Copyright (C) 2015, Google, Inc.
 *
 * Written by Michael Halcrow, 2015.
 * Modified by Jaegeuk Kim, 2015.
 */
#ifndef _LINUX_FSCRYPT_H
#define _LINUX_FSCRYPT_H

#include <linux/fs.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <uapi/linux/fscrypt.h>

#define FS_CRYPTO_BLOCK_SIZE		16

struct fscrypt_ctx;
struct fscrypt_info;

struct fscrypt_str {
	unsigned char *name;
	u32 len;
};

struct fscrypt_name {
	const struct qstr *usr_fname;
	struct fscrypt_str disk_name;
	u32 hash;
	u32 minor_hash;
	struct fscrypt_str crypto_buf;
	bool is_ciphertext_name;
};

#define FSTR_INIT(n, l)		{ .name = n, .len = l }
#define FSTR_TO_QSTR(f)		QSTR_INIT((f)->name, (f)->len)
#define fname_name(p)		((p)->disk_name.name)
#define fname_len(p)		((p)->disk_name.len)

/* Maximum value for the third parameter of fscrypt_operations.set_context(). */
#define FSCRYPT_SET_CONTEXT_MAX_SIZE	40

#ifdef CONFIG_FS_ENCRYPTION
/*
 * fscrypt superblock flags
 */
#define FS_CFLG_OWN_PAGES (1U << 1)

/*
 * crypto operations for filesystems
 */
struct fscrypt_operations {
	unsigned int flags;
	const char *key_prefix;
	int (*get_context)(struct inode *, void *, size_t);
	int (*set_context)(struct inode *, const void *, size_t, void *);
	bool (*dummy_context)(struct inode *);
	bool (*empty_dir)(struct inode *);
	unsigned int max_namelen;
};

/* Decryption work */
struct fscrypt_ctx {
	union {
		struct {
			struct bio *bio;
			struct work_struct work;
		};
		struct list_head free_list;	/* Free list */
	};
	u8 flags;				/* Flags */
};

static inline bool fscrypt_has_encryption_key(const struct inode *inode)
{
	/* pairs with cmpxchg_release() in fscrypt_get_encryption_info() */
	return READ_ONCE(inode->i_crypt_info) != NULL;
}

static inline bool fscrypt_dummy_context_enabled(struct inode *inode)
{
	return inode->i_sb->s_cop->dummy_context &&
		inode->i_sb->s_cop->dummy_context(inode);
}

/*
 * When d_splice_alias() moves a directory's encrypted alias to its decrypted
 * alias as a result of the encryption key being added, DCACHE_ENCRYPTED_NAME
 * must be cleared.  Note that we don't have to support arbitrary moves of this
 * flag because fscrypt doesn't allow encrypted aliases to be the source or
 * target of a rename().
 */
static inline void fscrypt_handle_d_move(struct dentry *dentry)
{
	dentry->d_flags &= ~DCACHE_ENCRYPTED_NAME;
}

/**
 * fscrypt_is_nokey_name() - test whether a dentry is a no-key name
 * @dentry: the dentry to check
 *
 * This returns true if the dentry is a no-key dentry.  A no-key dentry is a
 * dentry that was created in an encrypted directory that hasn't had its
 * encryption key added yet.  Such dentries may be either positive or negative.
 *
 * When a filesystem is asked to create a new filename in an encrypted directory
 * and the new filename's dentry is a no-key dentry, it must fail the operation
 * with ENOKEY.  This includes ->create(), ->mkdir(), ->mknod(), ->symlink(),
 * ->rename(), and ->link().  (However, ->rename() and ->link() are already
 * handled by fscrypt_prepare_rename() and fscrypt_prepare_link().)
 *
 * This is necessary because creating a filename requires the directory's
 * encryption key, but just checking for the key on the directory inode during
 * the final filesystem operation doesn't guarantee that the key was available
 * during the preceding dentry lookup.  And the key must have already been
 * available during the dentry lookup in order for it to have been checked
 * whether the filename already exists in the directory and for the new file's
 * dentry not to be invalidated due to it incorrectly having the no-key flag.
 *
 * Return: %true if the dentry is a no-key name
 */
static inline bool fscrypt_is_nokey_name(const struct dentry *dentry)
{
	return dentry->d_flags & DCACHE_ENCRYPTED_NAME;
}

/* crypto.c */
extern void fscrypt_enqueue_decrypt_work(struct work_struct *);
extern struct fscrypt_ctx *fscrypt_get_ctx(gfp_t);
extern void fscrypt_release_ctx(struct fscrypt_ctx *);

extern struct page *fscrypt_encrypt_pagecache_blocks(struct page *page,
						     unsigned int len,
						     unsigned int offs,
						     gfp_t gfp_flags);
extern int fscrypt_encrypt_block_inplace(const struct inode *inode,
					 struct page *page, unsigned int len,
					 unsigned int offs, u64 lblk_num,
					 gfp_t gfp_flags);

extern int fscrypt_decrypt_pagecache_blocks(struct page *page, unsigned int len,
					    unsigned int offs);
extern int fscrypt_decrypt_block_inplace(const struct inode *inode,
					 struct page *page, unsigned int len,
					 unsigned int offs, u64 lblk_num);

static inline bool fscrypt_is_bounce_page(struct page *page)
{
	return page->mapping == NULL;
}

static inline struct page *fscrypt_pagecache_page(struct page *bounce_page)
{
	return (struct page *)page_private(bounce_page);
}

extern void fscrypt_free_bounce_page(struct page *bounce_page);

/* policy.c */
extern int fscrypt_ioctl_set_policy(struct file *, const void __user *);
extern int fscrypt_ioctl_get_policy(struct file *, void __user *);
extern int fscrypt_ioctl_get_policy_ex(struct file *, void __user *);
extern int fscrypt_has_permitted_context(struct inode *, struct inode *);
extern int fscrypt_inherit_context(struct inode *, struct inode *,
					void *, bool);
/* keyring.c */
extern void fscrypt_sb_free(struct super_block *sb);
extern int fscrypt_ioctl_add_key(struct file *filp, void __user *arg);
extern int fscrypt_ioctl_remove_key(struct file *filp, void __user *arg);
extern int fscrypt_ioctl_remove_key_all_users(struct file *filp,
					      void __user *arg);
extern int fscrypt_ioctl_get_key_status(struct file *filp, void __user *arg);

/* keysetup.c */
extern int fscrypt_get_encryption_info(struct inode *);
extern void fscrypt_put_encryption_info(struct inode *);
extern void fscrypt_free_inode(struct inode *);
extern int fscrypt_drop_inode(struct inode *inode);

/* fname.c */
extern int fscrypt_setup_filename(struct inode *, const struct qstr *,
				int lookup, struct fscrypt_name *);

static inline void fscrypt_free_filename(struct fscrypt_name *fname)
{
	kfree(fname->crypto_buf.name);
}

extern int fscrypt_fname_alloc_buffer(const struct inode *, u32,
				struct fscrypt_str *);
extern void fscrypt_fname_free_buffer(struct fscrypt_str *);
extern int fscrypt_fname_disk_to_usr(struct inode *, u32, u32,
			const struct fscrypt_str *, struct fscrypt_str *);

#define FSCRYPT_FNAME_MAX_UNDIGESTED_SIZE	32

/* Extracts the second-to-last ciphertext block; see explanation below */
#define FSCRYPT_FNAME_DIGEST(name, len)	\
	((name) + round_down((len) - FS_CRYPTO_BLOCK_SIZE - 1, \
			     FS_CRYPTO_BLOCK_SIZE))

#define FSCRYPT_FNAME_DIGEST_SIZE	FS_CRYPTO_BLOCK_SIZE

/**
 * fscrypt_digested_name - alternate identifier for an on-disk filename
 *
 * When userspace lists an encrypted directory without access to the key,
 * filenames whose ciphertext is longer than FSCRYPT_FNAME_MAX_UNDIGESTED_SIZE
 * bytes are shown in this abbreviated form (base64-encoded) rather than as the
 * full ciphertext (base64-encoded).  This is necessary to allow supporting
 * filenames up to NAME_MAX bytes, since base64 encoding expands the length.
 *
 * To make it possible for filesystems to still find the correct directory entry
 * despite not knowing the full on-disk name, we encode any filesystem-specific
 * 'hash' and/or 'minor_hash' which the filesystem may need for its lookups,
 * followed by the second-to-last ciphertext block of the filename.  Due to the
 * use of the CBC-CTS encryption mode, the second-to-last ciphertext block
 * depends on the full plaintext.  (Note that ciphertext stealing causes the
 * last two blocks to appear "flipped".)  This makes accidental collisions very
 * unlikely: just a 1 in 2^128 chance for two filenames to collide even if they
 * share the same filesystem-specific hashes.
 *
 * However, this scheme isn't immune to intentional collisions, which can be
 * created by anyone able to create arbitrary plaintext filenames and view them
 * without the key.  Making the "digest" be a real cryptographic hash like
 * SHA-256 over the full ciphertext would prevent this, although it would be
 * less efficient and harder to implement, especially since the filesystem would
 * need to calculate it for each directory entry examined during a search.
 */
struct fscrypt_digested_name {
	u32 hash;
	u32 minor_hash;
	u8 digest[FSCRYPT_FNAME_DIGEST_SIZE];
};

/**
 * fscrypt_match_name() - test whether the given name matches a directory entry
 * @fname: the name being searched for
 * @de_name: the name from the directory entry
 * @de_name_len: the length of @de_name in bytes
 *
 * Normally @fname->disk_name will be set, and in that case we simply compare
 * that to the name stored in the directory entry.  The only exception is that
 * if we don't have the key for an encrypted directory and a filename in it is
 * very long, then we won't have the full disk_name and we'll instead need to
 * match against the fscrypt_digested_name.
 *
 * Return: %true if the name matches, otherwise %false.
 */
static inline bool fscrypt_match_name(const struct fscrypt_name *fname,
				      const u8 *de_name, u32 de_name_len)
{
	if (unlikely(!fname->disk_name.name)) {
		const struct fscrypt_digested_name *n =
			(const void *)fname->crypto_buf.name;
		if (WARN_ON_ONCE(fname->usr_fname->name[0] != '_'))
			return false;
		if (de_name_len <= FSCRYPT_FNAME_MAX_UNDIGESTED_SIZE)
			return false;
		return !memcmp(FSCRYPT_FNAME_DIGEST(de_name, de_name_len),
			       n->digest, FSCRYPT_FNAME_DIGEST_SIZE);
	}

if (de_name_len != fname->disk_name.len)
		return false;
	return !memcmp(de_name, fname->disk_name.name, fname->disk_name.len);
}

/* bio.c */
extern void fscrypt_decrypt_bio(struct bio *);
extern void fscrypt_enqueue_decrypt_bio(struct fscrypt_ctx *ctx,
					struct bio *bio);
extern int fscrypt_zeroout_range(const struct inode *, pgoff_t, sector_t,
				 unsigned int);

/* hooks.c */
extern int fscrypt_file_open(struct inode *inode, struct file *filp);
extern int __fscrypt_prepare_link(struct inode *inode, struct inode *dir,
				  struct dentry *dentry);
extern int __fscrypt_prepare_rename(struct inode *old_dir,
				    struct dentry *old_dentry,
				    struct inode *new_dir,
				    struct dentry *new_dentry,
				    unsigned int flags);
extern int __fscrypt_prepare_lookup(struct inode *dir, struct dentry *dentry,
				    struct fscrypt_name *fname);
extern int __fscrypt_prepare_symlink(struct inode *dir, unsigned int len,
				     unsigned int max_len,
				     struct fscrypt_str *disk_link);
extern int __fscrypt_encrypt_symlink(struct inode *inode, const char *target,
				     unsigned int len,
				     struct fscrypt_str *disk_link);
extern const char *fscrypt_get_symlink(struct inode *inode, const void *caddr,
				       unsigned int max_size,
				       struct delayed_call *done);
int fscrypt_symlink_getattr(const struct path *path, struct kstat *stat);
static inline void fscrypt_set_ops(struct super_block *sb,
				   const struct fscrypt_operations *s_cop)
{
	sb->s_cop = s_cop;
}
#else  /* !CONFIG_FS_ENCRYPTION */

static inline bool fscrypt_has_encryption_key(const struct inode *inode)
{
	return false;
}

static inline bool fscrypt_dummy_context_enabled(struct inode *inode)
{
	return false;
}

static inline void fscrypt_handle_d_move(struct dentry *dentry)
{
}

static inline bool fscrypt_is_nokey_name(const struct dentry *dentry)
{
	return false;
}

/* crypto.c */
static inline void fscrypt_enqueue_decrypt_work(struct work_struct *work)
{
}

static inline struct fscrypt_ctx *fscrypt_get_ctx(gfp_t gfp_flags)
{
	return ERR_PTR(-EOPNOTSUPP);
}

static inline void fscrypt_release_ctx(struct fscrypt_ctx *ctx)
{
	return;
}

static inline struct page *fscrypt_encrypt_pagecache_blocks(struct page *page,
							    unsigned int len,
							    unsigned int offs,
							    gfp_t gfp_flags)
{
	return ERR_PTR(-EOPNOTSUPP);
}

static inline int fscrypt_encrypt_block_inplace(const struct inode *inode,
						struct page *page,
						unsigned int len,
						unsigned int offs, u64 lblk_num,
						gfp_t gfp_flags)
{
	return -EOPNOTSUPP;
}

static inline int fscrypt_decrypt_pagecache_blocks(struct page *page,
						   unsigned int len,
						   unsigned int offs)
{
	return -EOPNOTSUPP;
}

static inline int fscrypt_decrypt_block_inplace(const struct inode *inode,
						struct page *page,
						unsigned int len,
						unsigned int offs, u64 lblk_num)
{
	return -EOPNOTSUPP;
}

static inline bool fscrypt_is_bounce_page(struct page *page)
{
	return false;
}

static inline struct page *fscrypt_pagecache_page(struct page *bounce_page)
{
	WARN_ON_ONCE(1);
	return ERR_PTR(-EINVAL);
}

static inline void fscrypt_free_bounce_page(struct page *bounce_page)
{
}

/* policy.c */
static inline int fscrypt_ioctl_set_policy(struct file *filp,
					   const void __user *arg)
{
	return -EOPNOTSUPP;
}

static inline int fscrypt_ioctl_get_policy(struct file *filp, void __user *arg)
{
	return -EOPNOTSUPP;
}

static inline int fscrypt_ioctl_get_policy_ex(struct file *filp,
					      void __user *arg)
{
	return -EOPNOTSUPP;
}

static inline int fscrypt_has_permitted_context(struct inode *parent,
						struct inode *child)
{
	return 0;
}

static inline int fscrypt_inherit_context(struct inode *parent,
					  struct inode *child,
					  void *fs_data, bool preload)
{
	return -EOPNOTSUPP;
}

/* keyring.c */
static inline void fscrypt_sb_free(struct super_block *sb)
{
}

static inline int fscrypt_ioctl_add_key(struct file *filp, void __user *arg)
{
	return -EOPNOTSUPP;
}

static inline int fscrypt_ioctl_remove_key(struct file *filp, void __user *arg)
{
	return -EOPNOTSUPP;
}

static inline int fscrypt_ioctl_remove_key_all_users(struct file *filp,
						     void __user *arg)
{
	return -EOPNOTSUPP;
}

static inline int fscrypt_ioctl_get_key_status(struct file *filp,
					       void __user *arg)
{
	return -EOPNOTSUPP;
}

/* keysetup.c */
static inline int fscrypt_get_encryption_info(struct inode *inode)
{
	return -EOPNOTSUPP;
}

static inline void fscrypt_put_encryption_info(struct inode *inode)
{
	return;
}

static inline void fscrypt_free_inode(struct inode *inode)
{
}

static inline int fscrypt_drop_inode(struct inode *inode)
{
	return 0;
}

/* fname.c */
static inline int fscrypt_setup_filename(struct inode *dir,
					 const struct qstr *iname,
					 int lookup, struct fscrypt_name *fname)
{
	if (IS_ENCRYPTED(dir))
		return -EOPNOTSUPP;

memset(fname, 0, sizeof(*fname));
	fname->usr_fname = iname;
	fname->disk_name.name = (unsigned char *)iname->name;
	fname->disk_name.len = iname->len;
	return 0;
}

static inline void fscrypt_free_filename(struct fscrypt_name *fname)
{
	return;
}

static inline int fscrypt_fname_alloc_buffer(const struct inode *inode,
					     u32 max_encrypted_len,
					     struct fscrypt_str *crypto_str)
{
	return -EOPNOTSUPP;
}

static inline void fscrypt_fname_free_buffer(struct fscrypt_str *crypto_str)
{
	return;
}

static inline int fscrypt_fname_disk_to_usr(struct inode *inode,
					    u32 hash, u32 minor_hash,
					    const struct fscrypt_str *iname,
					    struct fscrypt_str *oname)
{
	return -EOPNOTSUPP;
}

static inline bool fscrypt_match_name(const struct fscrypt_name *fname,
				      const u8 *de_name, u32 de_name_len)
{
	/* Encryption support disabled; use standard comparison */
	if (de_name_len != fname->disk_name.len)
		return false;
	return !memcmp(de_name, fname->disk_name.name, fname->disk_name.len);
}

/* bio.c */
static inline void fscrypt_decrypt_bio(struct bio *bio)
{
}

static inline void fscrypt_enqueue_decrypt_bio(struct fscrypt_ctx *ctx,
					       struct bio *bio)
{
}

static inline int fscrypt_zeroout_range(const struct inode *inode, pgoff_t lblk,
					sector_t pblk, unsigned int len)
{
	return -EOPNOTSUPP;
}

/* hooks.c */

static inline int fscrypt_file_open(struct inode *inode, struct file *filp)
{
	if (IS_ENCRYPTED(inode))
		return -EOPNOTSUPP;
	return 0;
}

static inline int __fscrypt_prepare_link(struct inode *inode, struct inode *dir,
					 struct dentry *dentry)
{
	return -EOPNOTSUPP;
}

static inline int __fscrypt_prepare_rename(struct inode *old_dir,
					   struct dentry *old_dentry,
					   struct inode *new_dir,
					   struct dentry *new_dentry,
					   unsigned int flags)
{
	return -EOPNOTSUPP;
}

static inline int __fscrypt_prepare_lookup(struct inode *dir,
					   struct dentry *dentry,
					   struct fscrypt_name *fname)
{
	return -EOPNOTSUPP;
}

static inline int __fscrypt_prepare_symlink(struct inode *dir,
					    unsigned int len,
					    unsigned int max_len,
					    struct fscrypt_str *disk_link)
{
	return -EOPNOTSUPP;
}

static inline int __fscrypt_encrypt_symlink(struct inode *inode,
					    const char *target,
					    unsigned int len,
					    struct fscrypt_str *disk_link)
{
	return -EOPNOTSUPP;
}

static inline const char *fscrypt_get_symlink(struct inode *inode,
					      const void *caddr,
					      unsigned int max_size,
					      struct delayed_call *done)
{
	return ERR_PTR(-EOPNOTSUPP);
}

static inline int fscrypt_symlink_getattr(const struct path *path,
					  struct kstat *stat)
{
	return -EOPNOTSUPP;
}

static inline void fscrypt_set_ops(struct super_block *sb,
				   const struct fscrypt_operations *s_cop)
{
}

#endif	/* !CONFIG_FS_ENCRYPTION */

/**
 * fscrypt_require_key - require an inode's encryption key
 * @inode: the inode we need the key for
 *
 * If the inode is encrypted, set up its encryption key if not already done.
 * Then require that the key be present and return -ENOKEY otherwise.
 *
 * No locks are needed, and the key will live as long as the struct inode --- so
 * it won't go away from under you.
 *
 * Return: 0 on success, -ENOKEY if the key is missing, or another -errno code
 * if a problem occurred while setting up the encryption key.
 */
static inline int fscrypt_require_key(struct inode *inode)
{
	if (IS_ENCRYPTED(inode)) {
		int err = fscrypt_get_encryption_info(inode);

if (err)
			return err;
		if (!fscrypt_has_encryption_key(inode))
			return -ENOKEY;
	}
	return 0;
}

/**
 * fscrypt_prepare_link - prepare to link an inode into a possibly-encrypted directory
 * @old_dentry: an existing dentry for the inode being linked
 * @dir: the target directory
 * @dentry: negative dentry for the target filename
 *
 * A new link can only be added to an encrypted directory if the directory's
 * encryption key is available --- since otherwise we'd have no way to encrypt
 * the filename.  Therefore, we first set up the directory's encryption key (if
 * not already done) and return an error if it's unavailable.
 *
 * We also verify that the link will not violate the constraint that all files
 * in an encrypted directory tree use the same encryption policy.
 *
 * Return: 0 on success, -ENOKEY if the directory's encryption key is missing,
 * -EXDEV if the link would result in an inconsistent encryption policy, or
 * another -errno code.
 */
static inline int fscrypt_prepare_link(struct dentry *old_dentry,
				       struct inode *dir,
				       struct dentry *dentry)
{
	if (IS_ENCRYPTED(dir))
		return __fscrypt_prepare_link(d_inode(old_dentry), dir, dentry);
	return 0;
}

/**
 * fscrypt_prepare_rename - prepare for a rename between possibly-encrypted directories
 * @old_dir: source directory
 * @old_dentry: dentry for source file
 * @new_dir: target directory
 * @new_dentry: dentry for target location (may be negative unless exchanging)
 * @flags: rename flags (we care at least about %RENAME_EXCHANGE)
 *
 * Prepare for ->rename() where the source and/or target directories may be
 * encrypted.  A new link can only be added to an encrypted directory if the
 * directory's encryption key is available --- since otherwise we'd have no way
 * to encrypt the filename.  A rename to an existing name, on the other hand,
 * *is* cryptographically possible without the key.  However, we take the more
 * conservative approach and just forbid all no-key renames.
 *
 * We also verify that the rename will not violate the constraint that all files
 * in an encrypted directory tree use the same encryption policy.
 *
 * Return: 0 on success, -ENOKEY if an encryption key is missing, -EXDEV if the
 * rename would cause inconsistent encryption policies, or another -errno code.
 */
static inline int fscrypt_prepare_rename(struct inode *old_dir,
					 struct dentry *old_dentry,
					 struct inode *new_dir,
					 struct dentry *new_dentry,
					 unsigned int flags)
{
	if (IS_ENCRYPTED(old_dir) || IS_ENCRYPTED(new_dir))
		return __fscrypt_prepare_rename(old_dir, old_dentry,
						new_dir, new_dentry, flags);
	return 0;
}

/**
 * fscrypt_prepare_lookup - prepare to lookup a name in a possibly-encrypted directory
 * @dir: directory being searched
 * @dentry: filename being looked up
 * @fname: (output) the name to use to search the on-disk directory
 *
 * Prepare for ->lookup() in a directory which may be encrypted by determining
 * the name that will actually be used to search the directory on-disk.  Lookups
 * can be done with or without the directory's encryption key; without the key,
 * filenames are presented in encrypted form.  Therefore, we'll try to set up
 * the directory's encryption key, but even without it the lookup can continue.
 *
 * This also installs a custom ->d_revalidate() method which will invalidate the
 * dentry if it was created without the key and the key is later added.
 *
 * Return: 0 on success; -ENOENT if key is unavailable but the filename isn't a
 * correctly formed encoded ciphertext name, so a negative dentry should be
 * created; or another -errno code.
 */
static inline int fscrypt_prepare_lookup(struct inode *dir,
					 struct dentry *dentry,
					 struct fscrypt_name *fname)
{
	if (IS_ENCRYPTED(dir))
		return __fscrypt_prepare_lookup(dir, dentry, fname);

memset(fname, 0, sizeof(*fname));
	fname->usr_fname = &dentry->d_name;
	fname->disk_name.name = (unsigned char *)dentry->d_name.name;
	fname->disk_name.len = dentry->d_name.len;
	return 0;
}

/**
 * fscrypt_prepare_setattr - prepare to change a possibly-encrypted inode's attributes
 * @dentry: dentry through which the inode is being changed
 * @attr: attributes to change
 *
 * Prepare for ->setattr() on a possibly-encrypted inode.  On an encrypted file,
 * most attribute changes are allowed even without the encryption key.  However,
 * without the encryption key we do have to forbid truncates.  This is needed
 * because the size being truncated to may not be a multiple of the filesystem
 * block size, and in that case we'd have to decrypt the final block, zero the
 * portion past i_size, and re-encrypt it.  (We *could* allow truncating to a
 * filesystem block boundary, but it's simpler to just forbid all truncates ---
 * and we already forbid all other contents modifications without the key.)
 *
 * Return: 0 on success, -ENOKEY if the key is missing, or another -errno code
 * if a problem occurred while setting up the encryption key.
 */
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));
	return 0;
}

/**
 * fscrypt_prepare_symlink - prepare to create a possibly-encrypted symlink
 * @dir: directory in which the symlink is being created
 * @target: plaintext symlink target
 * @len: length of @target excluding null terminator
 * @max_len: space the filesystem has available to store the symlink target
 * @disk_link: (out) the on-disk symlink target being prepared
 *
 * This function computes the size the symlink target will require on-disk,
 * stores it in @disk_link->len, and validates it against @max_len.  An
 * encrypted symlink may be longer than the original.
 *
 * Additionally, @disk_link->name is set to @target if the symlink will be
 * unencrypted, but left NULL if the symlink will be encrypted.  For encrypted
 * symlinks, the filesystem must call fscrypt_encrypt_symlink() to create the
 * on-disk target later.  (The reason for the two-step process is that some
 * filesystems need to know the size of the symlink target before creating the
 * inode, e.g. to determine whether it will be a "fast" or "slow" symlink.)
 *
 * Return: 0 on success, -ENAMETOOLONG if the symlink target is too long,
 * -ENOKEY if the encryption key is missing, or another -errno code if a problem
 * occurred while setting up the encryption key.
 */
static inline int fscrypt_prepare_symlink(struct inode *dir,
					  const char *target,
					  unsigned int len,
					  unsigned int max_len,
					  struct fscrypt_str *disk_link)
{
	if (IS_ENCRYPTED(dir) || fscrypt_dummy_context_enabled(dir))
		return __fscrypt_prepare_symlink(dir, len, max_len, disk_link);

disk_link->name = (unsigned char *)target;
	disk_link->len = len + 1;
	if (disk_link->len > max_len)
		return -ENAMETOOLONG;
	return 0;
}

/**
 * fscrypt_encrypt_symlink - encrypt the symlink target if needed
 * @inode: symlink inode
 * @target: plaintext symlink target
 * @len: length of @target excluding null terminator
 * @disk_link: (in/out) the on-disk symlink target being prepared
 *
 * If the symlink target needs to be encrypted, then this function encrypts it
 * into @disk_link->name.  fscrypt_prepare_symlink() must have been called
 * previously to compute @disk_link->len.  If the filesystem did not allocate a
 * buffer for @disk_link->name after calling fscrypt_prepare_link(), then one
 * will be kmalloc()'ed and the filesystem will be responsible for freeing it.
 *
 * Return: 0 on success, -errno on failure
 */
static inline int fscrypt_encrypt_symlink(struct inode *inode,
					  const char *target,
					  unsigned int len,
					  struct fscrypt_str *disk_link)
{
	if (IS_ENCRYPTED(inode))
		return __fscrypt_encrypt_symlink(inode, target, len, disk_link);
	return 0;
}

/* If *pagep is a bounce page, free it and set *pagep to the pagecache page */
static inline void fscrypt_finalize_bounce_page(struct page **pagep)
{
	struct page *page = *pagep;

if (fscrypt_is_bounce_page(page)) {
		*pagep = fscrypt_pagecache_page(page);
		fscrypt_free_bounce_page(page);
	}
}

#endif	/* _LINUX_FSCRYPT_H */

[+] ..
[-] rpmsg.h [edit]
[-] tty_ldisc.h [edit]
[-] io-64-nonatomic-hi-lo.h [edit]
[-] fsl_devices.h [edit]
[-] ipc_namespace.h [edit]
[+] avf
[-] kvm_irqfd.h [edit]
[-] pwm.h [edit]
[-] lz4.h [edit]
[-] virtio_byteorder.h [edit]
[-] icmp.h [edit]
[-] sysfs.h [edit]
[-] sync_file.h [edit]
[-] elf-fdpic.h [edit]
[-] pmu.h [edit]
[-] dm-bufio.h [edit]
[-] kernelcapi.h [edit]
[-] if_tap.h [edit]
[-] serial_bcm63xx.h [edit]
[+] decompress
[+] dsa
[-] connector.h [edit]
[-] rmap.h [edit]
[-] ndctl.h [edit]
[-] ktime.h [edit]
[-] sh_intc.h [edit]
[-] timer.h [edit]
[-] win_minmax.h [edit]
[-] rslib.h [edit]
[-] gameport.h [edit]
[-] hrtimer.h [edit]
[-] irqreturn.h [edit]
[-] compiler.h [edit]
[+] netfilter
[-] page_idle.h [edit]
[-] swiotlb.h [edit]
[-] falloc.h [edit]
[-] fs_enet_pd.h [edit]
[-] fd.h [edit]
[-] assoc_array_priv.h [edit]
[-] kern_levels.h [edit]
[+] unaligned
[-] openvswitch.h [edit]
[-] nls.h [edit]
[-] io-64-nonatomic-lo-hi.h [edit]
[-] attribute_container.h [edit]
[-] powercap.h [edit]
[-] stmmac.h [edit]
[-] bch.h [edit]
[-] omapfb.h [edit]
[-] dm-io.h [edit]
[-] userfaultfd_k.h [edit]
[-] hid-sensor-ids.h [edit]
[-] vmalloc.h [edit]
[-] mISDNhw.h [edit]
[-] seq_file_net.h [edit]
[-] pm.h [edit]
[-] phy_led_triggers.h [edit]
[-] container.h [edit]
[+] byteorder
[-] vmw_vmci_defs.h [edit]
[-] apple-gmux.h [edit]
[-] pda_power.h [edit]
[-] uidgid.h [edit]
[-] sysv_fs.h [edit]
[-] seg6_genl.h [edit]
[-] adfs_fs.h [edit]
[-] mISDNif.h [edit]
[-] mod_devicetable.h [edit]
[-] if_macvlan.h [edit]
[-] idle_inject.h [edit]
[-] psci.h [edit]
[-] rio_regs.h [edit]
[-] fbcon.h [edit]
[-] interconnect.h [edit]
[-] thread_info.h [edit]
[-] ecryptfs.h [edit]
[-] sm501-regs.h [edit]
[-] videodev2.h [edit]
[-] crc16.h [edit]
[-] rwlock_api_smp.h [edit]
[-] netdev_features.h [edit]
[-] efi-bgrt.h [edit]
[-] pm_clock.h [edit]
[-] nvme.h [edit]
[-] dma-noncoherent.h [edit]
[-] delay.h [edit]
[-] dma-iommu.h [edit]
[-] if_rmnet.h [edit]
[-] netfilter_defs.h [edit]
[-] netfilter_bridge.h [edit]
[-] mv643xx.h [edit]
[-] ssbi.h [edit]
[-] of_dma.h [edit]
[+] soc
[-] mmiotrace.h [edit]
[-] asn1_decoder.h [edit]
[-] if_bridge.h [edit]
[-] arm-smccc.h [edit]
[-] coresight.h [edit]
[-] dcookies.h [edit]
[-] spinlock_up.h [edit]
[-] of_address.h [edit]
[-] isapnp.h [edit]
[-] pstore_ram.h [edit]
[-] msg.h [edit]
[-] dtlk.h [edit]
[-] mmdebug.h [edit]
[-] blk-mq-rdma.h [edit]
[-] tcp.h [edit]
[-] dma-mapping.h [edit]
[-] gfp.h [edit]
[-] nd.h [edit]
[-] kvm_host.h [edit]
[+] ceph
[+] iio
[-] bpf_lirc.h [edit]
[-] kdebug.h [edit]
[-] mutex.h [edit]
[-] pata_arasan_cf_data.h [edit]
[-] blkpg.h [edit]
[-] io-pgtable.h [edit]
[-] overflow.h [edit]
[-] genalloc.h [edit]
[-] blkdev.h [edit]
[-] atm_tcp.h [edit]
[-] ppp-comp.h [edit]
[-] kprobes.h [edit]
[+] mmc
[-] hw_breakpoint.h [edit]
[-] via-core.h [edit]
[-] semaphore.h [edit]
[-] genl_magic_func.h [edit]
[-] memcontrol.h [edit]
[-] intel-svm.h [edit]
[-] i2c-algo-bit.h [edit]
[-] io.h [edit]
[-] build-salt.h [edit]
[-] ipmi.h [edit]
[-] qnx6_fs.h [edit]
[-] spinlock_api_up.h [edit]
[-] mpage.h [edit]
[+] soundwire
[-] iommu.h [edit]
[-] security.h [edit]
[-] parport_pc.h [edit]
[-] ptrace.h [edit]
[-] getcpu.h [edit]
[-] xattr.h [edit]
[-] raid_class.h [edit]
[-] mm_inline.h [edit]
[-] node.h [edit]
[-] inet_diag.h [edit]
[-] goldfish.h [edit]
[-] bitfield.h [edit]
[-] memblock.h [edit]
[-] bsearch.h [edit]
[-] compiler_attributes.h [edit]
[-] kexec.h [edit]
[-] pci-ecam.h [edit]
[-] via.h [edit]
[-] cgroup.h [edit]
[-] dma-debug.h [edit]
[-] swap_cgroup.h [edit]
[-] nospec.h [edit]
[-] seg6_iptunnel.h [edit]
[+] i3c
[-] errno.h [edit]
[-] if_eql.h [edit]
[-] stackleak.h [edit]
[-] leds-lp3952.h [edit]
[-] icmpv6.h [edit]
[+] mailbox
[-] timerqueue.h [edit]
[-] memremap.h [edit]
[-] bsg.h [edit]
[+] firmware
[-] task_io_accounting_ops.h [edit]
[-] uts.h [edit]
[-] module.h [edit]
[-] hashtable.h [edit]
[-] sfi_acpi.h [edit]
[-] iommu-helper.h [edit]
[-] flex_proportions.h [edit]
[-] srcutiny.h [edit]
[-] posix-clock.h [edit]
[+] mlx4
[-] lcd.h [edit]
[+] wimax
[-] dm-dirty-log.h [edit]
[-] dnotify.h [edit]
[-] ipmi-fru.h [edit]
[-] acpi_iort.h [edit]
[-] mc6821.h [edit]
[-] dm-kcopyd.h [edit]
[-] backing-dev.h [edit]
[-] edd.h [edit]
[-] btree-128.h [edit]
[-] scpi_protocol.h [edit]
[-] nfsacl.h [edit]
[-] stringify.h [edit]
[-] init.h [edit]
[-] integrity.h [edit]
[-] bcm963xx_tag.h [edit]
[+] sched
[-] earlycpio.h [edit]
[-] fec.h [edit]
[-] dim.h [edit]
[-] rio_drv.h [edit]
[-] gpio-pxa.h [edit]
[-] exportfs.h [edit]
[-] pxa168_eth.h [edit]
[-] stat.h [edit]
[-] microchipphy.h [edit]
[-] shrinker.h [edit]
[-] kcov.h [edit]
[-] olpc-ec.h [edit]
[-] ns_common.h [edit]
[-] netfilter.h [edit]
[-] sm501.h [edit]
[-] parser.h [edit]
[-] cordic.h [edit]
[-] restart_block.h [edit]
[-] mroute_base.h [edit]
[-] resource_ext.h [edit]
[-] rndis.h [edit]
[-] bit_spinlock.h [edit]
[-] tboot.h [edit]
[-] tracehook.h [edit]
[-] ipack.h [edit]
[-] err.h [edit]
[-] fscrypt.h [edit]
[-] syslog.h [edit]
[-] mc146818rtc.h [edit]
[-] seg6.h [edit]
[-] skb_array.h [edit]
[-] mISDNdsp.h [edit]
[-] irq_sim.h [edit]
[-] kasan-checks.h [edit]
[-] pci_hotplug.h [edit]
[-] gpio_keys.h [edit]
[-] oprofile.h [edit]
[-] arm_sdei.h [edit]
[-] sunxi-rsb.h [edit]
[-] ucb1400.h [edit]
[-] stm.h [edit]
[-] hardirq.h [edit]
[-] xz.h [edit]
[-] sys.h [edit]
[-] lightnvm.h [edit]
[-] mroute6.h [edit]
[-] atmdev.h [edit]
[-] sort.h [edit]
[-] cpu_pm.h [edit]
[-] mmu_notifier.h [edit]
[-] z2_battery.h [edit]
[-] types.h [edit]
[-] rtmutex.h [edit]
[-] purgatory.h [edit]
[-] hil.h [edit]
[-] printk.h [edit]
[-] ide.h [edit]
[-] mm-arch-hooks.h [edit]
[-] sfi.h [edit]
[-] devcoredump.h [edit]
[-] ipmi_smi.h [edit]
[-] bcm47xx_sprom.h [edit]
[-] uaccess.h [edit]
[-] dmar.h [edit]
[-] kthread.h [edit]
[-] journal-head.h [edit]
[-] wm97xx.h [edit]
[-] irqhandler.h [edit]
[-] lockdep.h [edit]
[-] fs_pin.h [edit]
[-] kbuild.h [edit]
[-] pstore.h [edit]
[-] kernel.h [edit]
[-] blktrace_api.h [edit]
[-] consolemap.h [edit]
[-] fsi-occ.h [edit]
[-] poll.h [edit]
[-] pvclock_gtod.h [edit]
[-] lantiq.h [edit]
[-] list_nulls.h [edit]
[+] power
[-] file.h [edit]
[-] netdevice.h [edit]
[-] host1x.h [edit]
[-] eventpoll.h [edit]
[-] vt_buffer.h [edit]
[-] page_ref.h [edit]
[-] ti_wilink_st.h [edit]
[-] coda.h [edit]
[-] hil_mlc.h [edit]
[-] kconfig.h [edit]
[-] rtc.h [edit]
[-] rhashtable-types.h [edit]
[-] workqueue.h [edit]
[-] device.h [edit]
[-] hdmi.h [edit]
[-] intel-ish-client-if.h [edit]
[-] osq_lock.h [edit]
[-] buffer_head.h [edit]
[-] firmware.h [edit]
[-] ratelimit.h [edit]
[-] jiffies.h [edit]
[-] bpf.h [edit]
[-] aio.h [edit]
[-] bitops.h [edit]
[-] cpumask.h [edit]
[-] cpuset.h [edit]
[-] cuda.h [edit]
[-] nvme-fc-driver.h [edit]
[-] apm_bios.h [edit]
[-] eeprom_93cx6.h [edit]
[-] lru_cache.h [edit]
[-] export.h [edit]
[-] apm-emulation.h [edit]
[-] coresight-stm.h [edit]
[-] crc32c.h [edit]
[-] skmsg.h [edit]
[-] leds-bd2802.h [edit]
[-] acpi.h [edit]
[-] auto_dev-ioctl.h [edit]
[-] nfs4.h [edit]
[-] cgroup-defs.h [edit]
[-] gnss.h [edit]
[-] jbd2.h [edit]
[-] signal_types.h [edit]
[-] topology.h [edit]
[-] patchkey.h [edit]
[-] sed-opal.h [edit]
[-] timerfd.h [edit]
[-] devfreq_cooling.h [edit]
[-] stackprotector.h [edit]
[-] pid_namespace.h [edit]
[-] seq_buf.h [edit]
[-] f2fs_fs.h [edit]
[-] asn1.h [edit]
[-] atmel_pdc.h [edit]
[-] parman.h [edit]
[-] intel_rapl.h [edit]
[-] atomic-fallback.h [edit]
[-] altera_uart.h [edit]
[-] virtio_console.h [edit]
[-] count_zeros.h [edit]
[-] aer.h [edit]
[-] bpf_types.h [edit]
[-] mpls_iptunnel.h [edit]
[-] zpool.h [edit]
[-] serdev.h [edit]
[-] scmi_protocol.h [edit]
[-] context_tracking_state.h [edit]
[-] rbtree.h [edit]
[-] mcb.h [edit]
[-] ksm.h [edit]
[-] cpuhotplug.h [edit]
[-] hpet.h [edit]
[-] shm.h [edit]
[-] b1pcmcia.h [edit]
[-] inet.h [edit]
[-] mount.h [edit]
[-] btrfs.h [edit]
[-] cache.h [edit]
[-] cnt32_to_63.h [edit]
[-] rcu_sync.h [edit]
[-] agp_backend.h [edit]
[-] console.h [edit]
[-] compiler_types.h [edit]
[-] if_phonet.h [edit]
[-] module_signature.h [edit]
[+] rpmsg
[-] stmp_device.h [edit]
[-] const.h [edit]
[-] sungem_phy.h [edit]
[-] svga.h [edit]
[-] cleancache.h [edit]
[-] stmp3xxx_rtc_wdt.h [edit]
[-] bpf_trace.h [edit]
[+] netfilter_ipv6
[+] hsi
[+] greybus
[-] if_team.h [edit]
[-] vme.h [edit]
[-] sysrq.h [edit]
[-] dca.h [edit]
[+] can
[-] flat.h [edit]
[-] key-type.h [edit]
[-] gcd.h [edit]
[-] livepatch.h [edit]
[-] sock_diag.h [edit]
[-] math64.h [edit]
[-] pagemap.h [edit]
[-] bitmap.h [edit]
[-] rational.h [edit]
[-] set_memory.h [edit]
[-] mm.h [edit]
[-] irqchip.h [edit]
[-] edac.h [edit]
[-] balloon_compaction.h [edit]
[-] pl353-smc.h [edit]
[-] mdio-bitbang.h [edit]
[-] llc.h [edit]
[-] regset.h [edit]
[-] mpls.h [edit]
[-] bpf_verifier.h [edit]
[-] init_ohci1394_dma.h [edit]
[-] stddef.h [edit]
[-] migrate_mode.h [edit]
[-] trace.h [edit]
[-] fcntl.h [edit]
[-] of_iommu.h [edit]
[-] average.h [edit]
[-] ctype.h [edit]
[-] w1.h [edit]
[-] efs_vh.h [edit]
[-] dma-fence.h [edit]
[-] pci_ids.h [edit]
[-] ahci-remap.h [edit]
[-] leds-pca9532.h [edit]
[-] micrel_phy.h [edit]
[-] sync_core.h [edit]
[-] ioc3.h [edit]
[-] reboot.h [edit]
[-] hwmon-sysfs.h [edit]
[-] dma-direction.h [edit]
[-] libgcc.h [edit]
[-] mem_encrypt.h [edit]
[-] leds-regulator.h [edit]
[+] sunrpc
[-] rodata_test.h [edit]
[-] qcom-geni-se.h [edit]
[-] of_mdio.h [edit]
[-] serial_8250.h [edit]
[-] i2c-dev.h [edit]
[-] if_arp.h [edit]
[-] net.h [edit]
[-] inetdevice.h [edit]
[-] virtio_net.h [edit]
[-] smc91x.h [edit]
[-] serial_s3c.h [edit]
[-] genetlink.h [edit]
[-] hid-debug.h [edit]
[-] ipc.h [edit]
[-] dqblk_qtree.h [edit]
[-] prime_numbers.h [edit]
[-] pnfs_osd_xdr.h [edit]
[-] i8253.h [edit]
[-] pci-p2pdma.h [edit]
[-] zstd.h [edit]
[-] netfilter_ingress.h [edit]
[-] verification.h [edit]
[-] lcm.h [edit]
[-] tifm.h [edit]
[-] of_graph.h [edit]
[-] lsm_hooks.h [edit]
[-] compiler-clang.h [edit]
[-] crash_dump.h [edit]
[-] dmi.h [edit]
[-] seqno-fence.h [edit]
[-] async_tx.h [edit]
[-] spinlock_types.h [edit]
[-] generic-radix-tree.h [edit]
[-] isa.h [edit]
[-] kvm_para.h [edit]
[-] binfmts.h [edit]
[-] igmp.h [edit]
[-] mroute.h [edit]
[-] spmi.h [edit]
[-] ptp_classify.h [edit]
[-] cn_proc.h [edit]
[-] pl320-ipc.h [edit]
[-] switchtec.h [edit]
[-] a.out.h [edit]
[-] ring_buffer.h [edit]
[-] device-mapper.h [edit]
[-] nfs.h [edit]
[-] hid-sensor-hub.h [edit]
[-] splice.h [edit]
[-] counter_enum.h [edit]
[-] sdb.h [edit]
[-] seg6_hmac.h [edit]
[-] nvme-rdma.h [edit]
[-] clkdev.h [edit]
[-] kcore.h [edit]
[-] util_macros.h [edit]
[-] audit.h [edit]
[-] ext2_fs.h [edit]
[-] hdlc.h [edit]
[+] bcma
[-] pm_opp.h [edit]
[-] typecheck.h [edit]
[-] dma-fence-chain.h [edit]
[-] projid.h [edit]
[-] sram.h [edit]
[-] torture.h [edit]
[-] lp.h [edit]
[-] wait_bit.h [edit]
[+] qed
[-] perf_event.h [edit]
[-] poison.h [edit]
[-] seq_file.h [edit]
[-] ip.h [edit]
[-] cb710.h [edit]
[-] seqlock.h [edit]
[-] vermagic.h [edit]
[-] digsig.h [edit]
[-] crc32poly.h [edit]
[-] mnt_namespace.h [edit]
[+] mtd
[-] lsm_audit.h [edit]
[-] omap-iommu.h [edit]
[-] plist.h [edit]
[-] lzo.h [edit]
[-] nl802154.h [edit]
[-] elf.h [edit]
[-] t10-pi.h [edit]
[-] limits.h [edit]
[-] intel-pti.h [edit]
[-] hp_sdc.h [edit]
[-] ras.h [edit]
[-] fsi.h [edit]
[-] pps_kernel.h [edit]
[-] mailbox_controller.h [edit]
[-] list_lru.h [edit]
[-] once.h [edit]
[-] cpuidle_haltpoll.h [edit]
[-] pageblock-flags.h [edit]
[-] remoteproc.h [edit]
[-] hugetlb_cgroup.h [edit]
[-] elfcore-compat.h [edit]
[-] initrd.h [edit]
[-] fsnotify.h [edit]
[-] pm_runtime.h [edit]
[-] rhashtable.h [edit]
[-] mei_cl_bus.h [edit]
[-] crc32.h [edit]
[-] rculist_bl.h [edit]
[-] posix_acl.h [edit]
[-] fsl-diu-fb.h [edit]
[-] random.h [edit]
[-] sh_dma.h [edit]
[-] zsmalloc.h [edit]
[-] string.h [edit]
[-] sonet.h [edit]
[-] cgroup_rdma.h [edit]
[-] kgdb.h [edit]
[-] crc-itu-t.h [edit]
[-] devfreq-event.h [edit]
[-] cper.h [edit]
[-] rtsx_common.h [edit]
[-] alarmtimer.h [edit]
[-] smp.h [edit]
[-] preempt.h [edit]
[+] gpio
[-] uio.h [edit]
[-] cfag12864b.h [edit]
[-] tty.h [edit]
[-] of_device.h [edit]
[-] in.h [edit]
[-] prefetch.h [edit]
[-] proc_ns.h [edit]
[-] htcpld.h [edit]
[-] tracepoint.h [edit]
[-] siphash.h [edit]
[-] spinlock_api_smp.h [edit]
[+] mlx5
[-] netlink.h [edit]
[-] f75375s.h [edit]
[-] psi.h [edit]
[-] bcm47xx_wdt.h [edit]
[-] errseq.h [edit]
[-] clockchips.h [edit]
[-] ks8842.h [edit]
[-] n_r3964.h [edit]
[-] dynamic_queue_limits.h [edit]
[-] percpu-rwsem.h [edit]
[-] interconnect-provider.h [edit]
[-] pm_wakeup.h [edit]
[-] genl_magic_struct.h [edit]
[-] tpm.h [edit]
[+] amba
[-] pipe_fs_i.h [edit]
[-] rtsx_usb.h [edit]
[-] lis3lv02d.h [edit]
[-] vlynq.h [edit]
[+] spi
[-] serial_sci.h [edit]
[+] rtc
[-] isicom.h [edit]
[-] vt.h [edit]
[-] ata_platform.h [edit]
[-] clocksource.h [edit]
[-] hwmon-vid.h [edit]
[-] reboot-mode.h [edit]
[-] init_task.h [edit]
[-] elevator.h [edit]
[-] dma-direct.h [edit]
[-] dma-buf.h [edit]
[-] iova.h [edit]
[-] debug_locks.h [edit]
[-] sbitmap.h [edit]
[-] hid-roccat.h [edit]
[-] ieee80211.h [edit]
[-] kref.h [edit]
[-] lockref.h [edit]
[-] error-injection.h [edit]
[-] regmap.h [edit]
[-] percpu-defs.h [edit]
[-] fs_uart_pd.h [edit]
[+] input
[-] shmem_fs.h [edit]
[-] debugfs.h [edit]
[+] mfd
[+] extcon
[-] build_bug.h [edit]
[-] dma-fence-array.h [edit]
[-] sirfsoc_dma.h [edit]
[+] reset
[-] sh_clk.h [edit]
[-] bitrev.h [edit]
[-] range.h [edit]
[-] mempolicy.h [edit]
[-] l2tp.h [edit]
[-] via-gpio.h [edit]
[-] pe.h [edit]
[-] moxtet.h [edit]
[-] inotify.h [edit]
[-] bottom_half.h [edit]
[-] rmi.h [edit]
[-] vga_switcheroo.h [edit]
[-] virtio_vsock.h [edit]
[-] rculist.h [edit]
[-] arch_topology.h [edit]
[-] keyboard.h [edit]
[-] qcom_scm.h [edit]
[-] rbtree_latch.h [edit]
[-] bio.h [edit]
[-] fwnode.h [edit]
[-] srcu.h [edit]
[-] jump_label.h [edit]
[-] auxvec.h [edit]
[-] irqbypass.h [edit]
[-] asn1_ber_bytecode.h [edit]
[-] crc-ccitt.h [edit]
[-] wait.h [edit]
[-] fs_stack.h [edit]
[-] hrtimer_defs.h [edit]
[-] vtime.h [edit]
[-] pm-trace.h [edit]
[-] kvm_types.h [edit]
[-] bma150.h [edit]
[-] logic_pio.h [edit]
[-] sched_clock.h [edit]
[-] capability.h [edit]
[-] smscphy.h [edit]
[-] blk-mq-virtio.h [edit]
[-] ucs2_string.h [edit]
[-] sxgbe_platform.h [edit]
[-] tpm_command.h [edit]
[-] pps-gpio.h [edit]
[-] thunderbolt.h [edit]
[-] nsproxy.h [edit]
[-] dns_resolver.h [edit]
[-] device_cgroup.h [edit]
[-] scx200_gpio.h [edit]
[-] atmel-ssc.h [edit]
[-] configfs.h [edit]
[-] huge_mm.h [edit]
[-] futex.h [edit]
[-] hid.h [edit]
[-] ata.h [edit]
[-] dcache.h [edit]
[-] efi.h [edit]
[-] textsearch.h [edit]
[-] crash_core.h [edit]
[-] i8042.h [edit]
[-] rbtree_augmented.h [edit]
[-] scatterlist.h [edit]
[-] compiler-gcc.h [edit]
[-] crc64.h [edit]
[-] wl12xx.h [edit]
[-] page_owner.h [edit]
[-] usb.h [edit]
[-] sched.h [edit]
[-] securebits.h [edit]
[-] siox.h [edit]
[-] path.h [edit]
[-] mic_bus.h [edit]
[-] cred.h [edit]
[-] wkup_m3_ipc.h [edit]
[+] perf
[-] console_struct.h [edit]
[-] indirect_call_wrapper.h [edit]
[-] fscache-cache.h [edit]
[-] pci-epf.h [edit]
[-] pm_wakeirq.h [edit]
[-] fault-inject.h [edit]
[-] llist.h [edit]
[-] time.h [edit]
[-] hugetlb_inline.h [edit]
[-] counter.h [edit]
[-] altera_jtaguart.h [edit]
[-] iomap.h [edit]
[-] atmel-mci.h [edit]
[-] mman.h [edit]
[-] nfs_iostat.h [edit]
[-] thermal.h [edit]
[-] pmbus.h [edit]
[-] nvmem-consumer.h [edit]
[-] zconf.h [edit]
[-] reset-controller.h [edit]
[-] task_io_accounting.h [edit]
[-] delayed_call.h [edit]
[-] sctp.h [edit]
[-] vfs.h [edit]
[-] rwlock.h [edit]
[-] sony-laptop.h [edit]
[-] ieee802154.h [edit]
[-] fb.h [edit]
[-] mbus.h [edit]
[-] irqdesc.h [edit]
[-] iopoll.h [edit]
[-] mmzone.h [edit]
[+] irqchip
[-] acct.h [edit]
[-] swab.h [edit]
[-] fsl_ifc.h [edit]
[-] hdlcdrv.h [edit]
[-] ramfs.h [edit]
[-] irq_cpustat.h [edit]
[-] hwmon.h [edit]
[-] umh.h [edit]
[-] screen_info.h [edit]
[-] netpoll.h [edit]
[-] clk-provider.h [edit]
[-] rcu_node_tree.h [edit]
[-] s3c_adc_battery.h [edit]
[-] filter.h [edit]
[-] iscsi_boot_sysfs.h [edit]
[-] threads.h [edit]
[-] unicode.h [edit]
[-] bcd.h [edit]
[-] power_supply.h [edit]
[-] syscalls.h [edit]
[-] page_ext.h [edit]
[-] yam.h [edit]
[-] smpboot.h [edit]
[+] isdn
[-] 8250_pci.h [edit]
[-] zutil.h [edit]
[-] nubus.h [edit]
[-] elfnote.h [edit]
[-] acpi_pmtmr.h [edit]
[-] bvec.h [edit]
[-] tpm_eventlog.h [edit]
[-] btree.h [edit]
[-] circ_buf.h [edit]
[-] seg6_local.h [edit]
[-] sw842.h [edit]
[-] i2c-smbus.h [edit]
[-] cpu_rmap.h [edit]
[-] namei.h [edit]
[-] joystick.h [edit]
[-] shdma-base.h [edit]
[-] i2c-algo-pcf.h [edit]
[-] quota.h [edit]
[-] parport.h [edit]
[-] cpufeature.h [edit]
[-] string_helpers.h [edit]
[-] padata.h [edit]
[-] numa.h [edit]
[-] io-mapping.h [edit]
[-] seccomp.h [edit]
[-] pti.h [edit]
[-] kobject.h [edit]
[-] compaction.h [edit]
[-] cpu.h [edit]
[-] pm2301_charger.h [edit]
[-] max17040_battery.h [edit]
[-] phonet.h [edit]
[-] if_ether.h [edit]
[-] udp.h [edit]
[-] bcm963xx_nvram.h [edit]
[+] clk
[-] libfdt.h [edit]
[-] tnum.h [edit]
[-] log2.h [edit]
[-] led-class-flash.h [edit]
[-] cgroup_subsys.h [edit]
[-] if_pppox.h [edit]
[-] mdio-mux.h [edit]
[-] sizes.h [edit]
[-] netfilter_ipv6.h [edit]
[-] usb_usual.h [edit]
[-] ascii85.h [edit]
[-] cma.h [edit]
[+] fsl
[-] tc.h [edit]
[-] skbuff.h [edit]
[-] mm_types.h [edit]
[-] rcutiny.h [edit]
[-] nvme-tcp.h [edit]
[-] mdio-gpio.h [edit]
[-] serio.h [edit]
[-] intel_th.h [edit]
[-] sfp.h [edit]
[-] iscsi_ibft.h [edit]
[-] rwsem.h [edit]
[-] coredump.h [edit]
[-] virtio_caif.h [edit]
[-] linkage.h [edit]
[-] keyctl.h [edit]
[-] ds2782_battery.h [edit]
[-] ftrace_irq.h [edit]
[-] visorbus.h [edit]
[-] pktcdvd.h [edit]
[-] dynamic_debug.h [edit]
[-] tty_flip.h [edit]
[-] extable.h [edit]
[-] swap_slots.h [edit]
[-] brcmphy.h [edit]
[-] errqueue.h [edit]
[-] fsl_hypervisor.h [edit]
[-] ipv6_route.h [edit]
[-] hugetlb.h [edit]
[+] remoteproc
[-] nfs_fs_sb.h [edit]
[-] rio.h [edit]
[-] leds-tca6507.h [edit]
[-] ethtool.h [edit]
[-] cryptohash.h [edit]
[-] sound.h [edit]
[-] wmi.h [edit]
[-] compiler-intel.h [edit]
[-] led-lm3530.h [edit]
[-] blk-mq-pci.h [edit]
[-] libps2.h [edit]
[-] extcon.h [edit]
[-] slab.h [edit]
[-] fsnotify_backend.h [edit]
[-] smsc911x.h [edit]
[-] mv643xx_eth.h [edit]
[-] virtio.h [edit]
[-] dmapool.h [edit]
[-] rfkill.h [edit]
[-] syscore_ops.h [edit]
[-] async.h [edit]
[-] hash.h [edit]
[-] eeprom_93xx46.h [edit]
[-] vexpress.h [edit]
[-] timekeeping32.h [edit]
[-] pkeys.h [edit]
[-] nvmem-provider.h [edit]
[-] kernel-page-flags.h [edit]
[-] vmstat.h [edit]
[-] iversion.h [edit]
[-] bug.h [edit]
[+] lockd
[+] usb
[-] crc7.h [edit]
[-] u64_stats_sync.h [edit]
[-] tty_driver.h [edit]
[-] packing.h [edit]
[-] if_tun.h [edit]
[-] apple_bl.h [edit]
[-] adxl.h [edit]
[+] phy
[-] swapfile.h [edit]
[-] if_fddi.h [edit]
[-] badblocks.h [edit]
[-] firewire.h [edit]
[-] blk-mq.h [edit]
[-] jz4740-adc.h [edit]
[-] etherdevice.h [edit]
[+] ssb
[-] pfn_t.h [edit]
[-] interval_tree_generic.h [edit]
[-] static_key.h [edit]
[-] rculist_nulls.h [edit]
[-] percpu_counter.h [edit]
[-] cdev.h [edit]
[-] psi_types.h [edit]
[-] phylink.h [edit]
[-] frontswap.h [edit]
[-] dirent.h [edit]
[-] spinlock_types_up.h [edit]
[-] notifier.h [edit]
[-] ptr_ring.h [edit]
[-] hmm.h [edit]
[+] fpga
[-] anon_inodes.h [edit]
[-] rtsx_pci.h [edit]
[-] property.h [edit]
[-] maple.h [edit]
[-] hyperv.h [edit]
[-] vbox_utils.h [edit]
[-] gpio.h [edit]
[-] jz4780-nemc.h [edit]
[+] netfilter_arp
[-] mii.h [edit]
[-] elfcore.h [edit]
[-] vmw_vmci_api.h [edit]
[-] uio_driver.h [edit]
[-] user.h [edit]
[-] pagevec.h [edit]
[-] srcutree.h [edit]
[-] ioprio.h [edit]
[-] greybus.h [edit]
[-] list_bl.h [edit]
[-] amd-iommu.h [edit]
[-] statfs.h [edit]
[-] user-return-notifier.h [edit]
[-] w1-gpio.h [edit]
[-] vm_sockets.h [edit]
[-] delayacct.h [edit]
[-] rcupdate_wait.h [edit]
[-] via_i2c.h [edit]
[+] pinctrl
[-] timex.h [edit]
[-] signal.h [edit]
[-] slab_def.h [edit]
[-] zorro.h [edit]
[-] frame.h [edit]
[-] proc_fs.h [edit]
[-] ihex.h [edit]
[-] i2c-mux.h [edit]
[-] sonypi.h [edit]
[-] cs5535.h [edit]
[-] pm_domain.h [edit]
[-] prandom.h [edit]
[-] extcon-provider.h [edit]
[-] nfs3.h [edit]
[-] tfrc.h [edit]
[-] pci-epc.h [edit]
[-] i2c-pxa.h [edit]
[-] virtio_config.h [edit]
[-] socket.h [edit]
[-] hypervisor.h [edit]
[-] sunserialcore.h [edit]
[-] tick.h [edit]
[-] crypto.h [edit]
[-] iocontext.h [edit]
[-] arm-cci.h [edit]
[-] highuid.h [edit]
[-] libfdt_env.h [edit]
[-] timb_dma.h [edit]
[-] timecounter.h [edit]
[-] memstick.h [edit]
[-] serial_core.h [edit]
[-] irq.h [edit]
[-] crc8.h [edit]
[+] mdio
[-] pagewalk.h [edit]
[-] bcm47xx_nvram.h [edit]
[-] input.h [edit]
[-] dmaengine.h [edit]
[-] sh_eth.h [edit]
[+] mux
[-] cpu_cooling.h [edit]
[-] component.h [edit]
[+] netfilter_bridge
[-] atomic.h [edit]
[-] mempool.h [edit]
[-] stringhash.h [edit]
[-] utsname.h [edit]
[-] rtnetlink.h [edit]
[-] nsc_gpio.h [edit]
[-] ftrace.h [edit]
[-] pxa2xx_ssp.h [edit]
[-] of_fdt.h [edit]
[-] if_ltalk.h [edit]
[-] alcor_pci.h [edit]
[-] oid_registry.h [edit]
[-] genhd.h [edit]
[-] energy_model.h [edit]
[-] idr.h [edit]
[-] eisa.h [edit]
[-] pim.h [edit]
[-] drbd_genl.h [edit]
[-] wireless.h [edit]
[-] radix-tree.h [edit]
[-] kbd_kern.h [edit]
[-] atm.h [edit]
[-] dma-contiguous.h [edit]
[-] superhyway.h [edit]
[-] posix_acl_xattr.h [edit]
[-] stop_machine.h [edit]
[-] fddidevice.h [edit]
[-] ti-emif-sram.h [edit]
[-] drbd.h [edit]
[-] time32.h [edit]
[+] netfilter_ipv4
[-] bpf-cgroup.h [edit]
[-] drbd_genl_api.h [edit]
[-] fanotify.h [edit]
[-] tca6416_keypad.h [edit]
[-] vfio.h [edit]
[-] compat.h [edit]
[-] cyclades.h [edit]
[-] c2port.h [edit]
[-] swapops.h [edit]
[-] objagg.h [edit]
[-] vt_kern.h [edit]
[-] sem.h [edit]
[-] rio_ids.h [edit]
[-] tracefs.h [edit]
[-] i2c.h [edit]
[-] fips.h [edit]
[-] list.h [edit]
[-] cacheinfo.h [edit]
[+] regulator
[-] blk-pm.h [edit]
[-] if_tunnel.h [edit]
[-] atalk.h [edit]
[-] posix-timers.h [edit]
[-] irq_work.h [edit]
[-] dw_apb_timer.h [edit]
[-] memory_hotplug.h [edit]
[+] ulpi
[-] kallsyms.h [edit]
[-] coresight-pmu.h [edit]
[-] irqdomain.h [edit]
[-] cciss_ioctl.h [edit]
[-] nvme-fc.h [edit]
[-] memory.h [edit]
[-] imx-media.h [edit]
[-] root_dev.h [edit]
[-] if_frad.h [edit]
[-] crc4.h [edit]
[-] agpgart.h [edit]
[-] of_net.h [edit]
[-] blk_types.h [edit]
[-] omap-dma.h [edit]
[-] ima.h [edit]
[-] in6.h [edit]
[-] i2c-algo-pca.h [edit]
[-] phy.h [edit]
[-] psp-sev.h [edit]
[-] msdos_fs.h [edit]
[-] pid.h [edit]
[-] leds-lp3944.h [edit]
[-] if_vlan.h [edit]
[-] input-polldev.h [edit]
[-] miscdevice.h [edit]
[-] ptp_clock_kernel.h [edit]
[-] interval_tree.h [edit]
[+] raid
[-] fsldma.h [edit]
[-] nvram.h [edit]
[-] mv643xx_i2c.h [edit]
[-] kobject_ns.h [edit]
[-] assoc_array.h [edit]
[-] interrupt.h [edit]
[-] lapb.h [edit]
[-] clk.h [edit]
[-] nfs_page.h [edit]
[-] watchdog.h [edit]
[-] timb_gpio.h [edit]
[-] kobj_map.h [edit]
[-] mmap_lock.h [edit]
[-] pr.h [edit]
[-] highmem.h [edit]
[-] dax.h [edit]
[-] klist.h [edit]
[-] ipv6.h [edit]
[-] kfifo.h [edit]
[-] serial.h [edit]
[-] leds_pwm.h [edit]
[-] atm_suni.h [edit]
[-] pnp.h [edit]
[-] dqblk_v2.h [edit]
[-] kmod.h [edit]
[-] pci-ats.h [edit]
[-] tsacct_kern.h [edit]
[-] kasan.h [edit]
[-] dlm_plock.h [edit]
[-] kernel_stat.h [edit]
[-] time64.h [edit]
[-] smc911x.h [edit]
[-] pwm_backlight.h [edit]
[-] personality.h [edit]
[-] ppp_channel.h [edit]
[-] pch_dma.h [edit]
[-] stacktrace.h [edit]
[-] armada-37xx-rwtm-mailbox.h [edit]
[-] intel-iommu.h [edit]
[-] ppp_defs.h [edit]
[-] ntb_transport.h [edit]
[-] ath9k_platform.h [edit]
[-] quotaops.h [edit]
[-] cm4000_cs.h [edit]
[-] user_namespace.h [edit]
[-] of_pdt.h [edit]
[-] nfs_fs.h [edit]
[-] slimbus.h [edit]
[-] pm_qos.h [edit]
[-] kmemleak.h [edit]
[-] serial_max3100.h [edit]
[-] usbdevice_fs.h [edit]
[-] blockgroup_lock.h [edit]
[-] dio.h [edit]
[-] elf-randomize.h [edit]
[-] khugepaged.h [edit]
[-] trace_events.h [edit]
[-] processor.h [edit]
[-] uuid.h [edit]
[-] dlm.h [edit]
[-] timekeeper_internal.h [edit]
[-] mpi.h [edit]
[-] vmacache.h [edit]
[-] of_gpio.h [edit]
[-] if_pppol2tp.h [edit]
[-] virtio_ring.h [edit]
[-] ks0108.h [edit]
[-] vmpressure.h [edit]
[-] freezer.h [edit]
[-] pci-ep-cfs.h [edit]
[-] davinci_emac.h [edit]
[+] crush
[-] mm_types_task.h [edit]
[-] moduleparam.h [edit]
[-] transport_class.h [edit]
[-] tee_drv.h [edit]
[-] xarray.h [edit]
[-] hw_random.h [edit]
[-] fcdevice.h [edit]
[-] synclink.h [edit]
[-] dma-resv.h [edit]
[-] fsverity.h [edit]
[-] adb.h [edit]
[-] hippidevice.h [edit]
[-] cpuidle.h [edit]
[-] irq_poll.h [edit]
[-] of.h [edit]
[-] latencytop.h [edit]
[-] mxm-wmi.h [edit]
[-] cdrom.h [edit]
[-] of_irq.h [edit]
[-] vm_event_item.h [edit]
[-] trace_clock.h [edit]
[-] font.h [edit]
[-] list_sort.h [edit]
[-] omap-mailbox.h [edit]
[+] platform_data
[-] mmu_context.h [edit]
[-] timekeeping.h [edit]
[-] ww_mutex.h [edit]
[-] dm-region-hash.h [edit]
[-] task_work.h [edit]
[-] leds-ti-lmu-common.h [edit]
[-] bsg-lib.h [edit]
[-] nfs_fs_i.h [edit]
[-] bits.h [edit]
[-] mailbox_client.h [edit]
[-] signalfd.h [edit]
[-] clock_cooling.h [edit]
[-] fscache.h [edit]
[-] bpfilter.h [edit]
[+] dma
[-] percpu.h [edit]
[-] msi.h [edit]
[-] evm.h [edit]
[-] scif.h [edit]
[-] profile.h [edit]
[-] pci.h [edit]
[-] enclosure.h [edit]
[-] rwlock_types.h [edit]
[-] pci-dma-compat.h [edit]
[-] blk-cgroup.h [edit]
[-] mvebu-pmsu.h [edit]
[-] sys_soc.h [edit]
[-] marvell_phy.h [edit]
[-] xxhash.h [edit]
[-] page_counter.h [edit]
[-] percpu-refcount.h [edit]
[-] linux_logo.h [edit]
[-] rcuwait.h [edit]
[-] oom.h [edit]
[-] memfd.h [edit]
[-] phy_fixed.h [edit]
[-] reset.h [edit]
[-] trace_seq.h [edit]
[-] suspend.h [edit]
[-] hiddev.h [edit]
[-] tracepoint-defs.h [edit]
[-] glob.h [edit]
[-] of_platform.h [edit]
[-] scc.h [edit]
[-] acpi_dma.h [edit]
[-] of_clk.h [edit]
[-] migrate.h [edit]
[-] kdb.h [edit]
[-] of_reserved_mem.h [edit]
[-] backing-dev-defs.h [edit]
[-] page-isolation.h [edit]
[-] nmi.h [edit]
[-] fs_types.h [edit]
[-] dqblk_v1.h [edit]
[-] platform_device.h [edit]
[-] uprobes.h [edit]
[-] fs_context.h [edit]
[-] pci-acpi.h [edit]
[-] spinlock.h [edit]
[-] drbd_limits.h [edit]
[-] cmdline-parser.h [edit]
[-] zbud.h [edit]
[-] backlight.h [edit]
[-] fs_parser.h [edit]
[-] serial_pnx8xxx.h [edit]
[-] kbd_diacr.h [edit]
[-] mdio.h [edit]
[-] libnvdimm.h [edit]
[-] ioport.h [edit]
[-] omap-gpmc.h [edit]
[-] refcount.h [edit]
[-] ntb.h [edit]
[-] ccp.h [edit]
[-] ks8851_mll.h [edit]
[-] start_kernel.h [edit]
[-] page-flags.h [edit]
[-] pfn.h [edit]
[-] firmware-map.h [edit]
[-] context_tracking.h [edit]
[-] kmsg_dump.h [edit]
[-] kdev_t.h [edit]
[-] fs_struct.h [edit]
[-] resource.h [edit]
[-] slub_def.h [edit]
[-] completion.h [edit]
[-] dccp.h [edit]
[-] rcu_segcblist.h [edit]
[-] mdev.h [edit]
[-] dm9000.h [edit]
[-] cpufreq.h [edit]
[-] crc-t10dif.h [edit]
[-] toshiba.h [edit]
[-] btree-type.h [edit]
[-] reciprocal_div.h [edit]
[-] devpts_fs.h [edit]
[-] fixp-arith.h [edit]
[-] stackdepot.h [edit]
[-] units.h [edit]
[-] ahci_platform.h [edit]
[-] key.h [edit]
[-] if_link.h [edit]
[-] fsi-sbefifo.h [edit]
[-] soundcard.h [edit]
[-] fs.h [edit]
[-] mbcache.h [edit]
[-] jump_label_ratelimit.h [edit]
[-] nfs_xdr.h [edit]
[-] nodemask.h [edit]
[-] sysctl.h [edit]
[-] scx200.h [edit]
[-] fdtable.h [edit]
[-] leds.h [edit]
[-] writeback.h [edit]
[-] irqflags.h [edit]
[-] selection.h [edit]
[-] textsearch_fsm.h [edit]
[-] zlib.h [edit]
[-] vringh.h [edit]
[-] moduleloader.h [edit]
[-] perf_regs.h [edit]
[-] linkmode.h [edit]
[-] rcupdate.h [edit]
[-] debugobjects.h [edit]
[-] swap.h [edit]
[-] ts-nbus.h [edit]
[-] btf.h [edit]
[-] jhash.h [edit]
[-] kernfs.h [edit]
[-] hwspinlock.h [edit]
[-] devfreq.h [edit]
[-] taskstats_kern.h [edit]
[-] relay.h [edit]
[-] hidraw.h [edit]
[-] eventfd.h [edit]
[-] page-flags-layout.h [edit]
[-] license.h [edit]
[-] rcutree.h [edit]
[-] sdla.h [edit]
[-] pseudo_fs.h [edit]
[-] libata.h [edit]
[-] timeriomem-rng.h [edit]
[-] sh_timer.h [edit]
[-] irqnr.h [edit]
[-] netfilter_ipv4.h [edit]
[-] swait.h [edit]
[-] of_pci.h [edit]
[-] vgaarb.h [edit]
[-] auto_fs.h [edit]