linux/fs/ntfs3/xattr.c

// SPDX-License-Identifier: GPL-2.0
/*
 *
 * Copyright (C) 2019-2021 Paragon Software GmbH, All rights reserved.
 *
 */

#include <linux/fs.h>
#include <linux/posix_acl.h>
#include <linux/posix_acl_xattr.h>
#include <linux/xattr.h>

#include "debug.h"
#include "ntfs.h"
#include "ntfs_fs.h"

// clang-format off
#define SYSTEM_DOS_ATTRIB …
#define SYSTEM_NTFS_ATTRIB …
#define SYSTEM_NTFS_ATTRIB_BE …
#define SYSTEM_NTFS_SECURITY …
// clang-format on

static inline size_t unpacked_ea_size(const struct EA_FULL *ea)
{ … }

static inline size_t packed_ea_size(const struct EA_FULL *ea)
{ … }

/*
 * find_ea
 *
 * Assume there is at least one xattr in the list.
 */
static inline bool find_ea(const struct EA_FULL *ea_all, u32 bytes,
			   const char *name, u8 name_len, u32 *off, u32 *ea_sz)
{ … }

/*
 * ntfs_read_ea - Read all extended attributes.
 * @ea:		New allocated memory.
 * @info:	Pointer into resident data.
 */
static int ntfs_read_ea(struct ntfs_inode *ni, struct EA_FULL **ea,
			size_t add_bytes, const struct EA_INFO **info)
{ … }

/*
 * ntfs_list_ea
 *
 * Copy a list of xattrs names into the buffer
 * provided, or compute the buffer size required.
 *
 * Return:
 * * Number of bytes used / required on
 * * -ERRNO - on failure
 */
static ssize_t ntfs_list_ea(struct ntfs_inode *ni, char *buffer,
			    size_t bytes_per_buffer)
{ … }

static int ntfs_get_ea(struct inode *inode, const char *name, size_t name_len,
		       void *buffer, size_t size, size_t *required)
{ … }

static noinline int ntfs_set_ea(struct inode *inode, const char *name,
				size_t name_len, const void *value,
				size_t val_size, int flags, bool locked,
				__le16 *ea_size)
{ … }

#ifdef CONFIG_NTFS3_FS_POSIX_ACL

/*
 * ntfs_get_acl - inode_operations::get_acl
 */
struct posix_acl *ntfs_get_acl(struct mnt_idmap *idmap, struct dentry *dentry,
			       int type)
{ … }

static noinline int ntfs_set_acl_ex(struct mnt_idmap *idmap,
				    struct inode *inode, struct posix_acl *acl,
				    int type, bool init_acl)
{ … }

/*
 * ntfs_set_acl - inode_operations::set_acl
 */
int ntfs_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
		 struct posix_acl *acl, int type)
{ … }

/*
 * ntfs_init_acl - Initialize the ACLs of a new inode.
 *
 * Called from ntfs_create_inode().
 */
int ntfs_init_acl(struct mnt_idmap *idmap, struct inode *inode,
		  struct inode *dir)
{ … }
#endif

/*
 * ntfs_acl_chmod - Helper for ntfs3_setattr().
 */
int ntfs_acl_chmod(struct mnt_idmap *idmap, struct dentry *dentry)
{ … }

/*
 * ntfs_listxattr - inode_operations::listxattr
 */
ssize_t ntfs_listxattr(struct dentry *dentry, char *buffer, size_t size)
{ … }

static int ntfs_getxattr(const struct xattr_handler *handler, struct dentry *de,
			 struct inode *inode, const char *name, void *buffer,
			 size_t size)
{ … }

/*
 * ntfs_setxattr - inode_operations::setxattr
 */
static noinline int ntfs_setxattr(const struct xattr_handler *handler,
				  struct mnt_idmap *idmap, struct dentry *de,
				  struct inode *inode, const char *name,
				  const void *value, size_t size, int flags)
{ … }

/*
 * ntfs_save_wsl_perm
 *
 * save uid/gid/mode in xattr
 */
int ntfs_save_wsl_perm(struct inode *inode, __le16 *ea_size)
{ … }

/*
 * ntfs_get_wsl_perm
 *
 * get uid/gid/mode from xattr
 * it is called from ntfs_iget5->ntfs_read_mft
 */
void ntfs_get_wsl_perm(struct inode *inode)
{ … }

static bool ntfs_xattr_user_list(struct dentry *dentry)
{ … }

// clang-format off
static const struct xattr_handler ntfs_other_xattr_handler = …;

const struct xattr_handler * const ntfs_xattr_handlers[] = …;
// clang-format on