cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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xattr.h (3834B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2#include <linux/reiserfs_xattr.h>
      3#include <linux/init.h>
      4#include <linux/list.h>
      5#include <linux/rwsem.h>
      6#include <linux/xattr.h>
      7
      8struct inode;
      9struct dentry;
     10struct iattr;
     11struct super_block;
     12
     13int reiserfs_xattr_register_handlers(void) __init;
     14void reiserfs_xattr_unregister_handlers(void);
     15int reiserfs_xattr_init(struct super_block *sb, int mount_flags);
     16int reiserfs_lookup_privroot(struct super_block *sb);
     17int reiserfs_delete_xattrs(struct inode *inode);
     18int reiserfs_chown_xattrs(struct inode *inode, struct iattr *attrs);
     19int reiserfs_permission(struct user_namespace *mnt_userns,
     20			struct inode *inode, int mask);
     21
     22#ifdef CONFIG_REISERFS_FS_XATTR
     23#define has_xattr_dir(inode) (REISERFS_I(inode)->i_flags & i_has_xattr_dir)
     24ssize_t reiserfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
     25
     26int reiserfs_xattr_get(struct inode *, const char *, void *, size_t);
     27int reiserfs_xattr_set(struct inode *, const char *, const void *, size_t, int);
     28int reiserfs_xattr_set_handle(struct reiserfs_transaction_handle *,
     29			      struct inode *, const char *, const void *,
     30			      size_t, int);
     31
     32extern const struct xattr_handler reiserfs_xattr_user_handler;
     33extern const struct xattr_handler reiserfs_xattr_trusted_handler;
     34extern const struct xattr_handler reiserfs_xattr_security_handler;
     35#ifdef CONFIG_REISERFS_FS_SECURITY
     36int reiserfs_security_init(struct inode *dir, struct inode *inode,
     37			   const struct qstr *qstr,
     38			   struct reiserfs_security_handle *sec);
     39int reiserfs_security_write(struct reiserfs_transaction_handle *th,
     40			    struct inode *inode,
     41			    struct reiserfs_security_handle *sec);
     42void reiserfs_security_free(struct reiserfs_security_handle *sec);
     43#endif
     44
     45static inline int reiserfs_xattrs_initialized(struct super_block *sb)
     46{
     47	return REISERFS_SB(sb)->priv_root && REISERFS_SB(sb)->xattr_root;
     48}
     49
     50#define xattr_size(size) ((size) + sizeof(struct reiserfs_xattr_header))
     51static inline loff_t reiserfs_xattr_nblocks(struct inode *inode, loff_t size)
     52{
     53	loff_t ret = 0;
     54	if (reiserfs_file_data_log(inode)) {
     55		ret = _ROUND_UP(xattr_size(size), inode->i_sb->s_blocksize);
     56		ret >>= inode->i_sb->s_blocksize_bits;
     57	}
     58	return ret;
     59}
     60
     61/*
     62 * We may have to create up to 3 objects: xattr root, xattr dir, xattr file.
     63 * Let's try to be smart about it.
     64 * xattr root: We cache it. If it's not cached, we may need to create it.
     65 * xattr dir: If anything has been loaded for this inode, we can set a flag
     66 *            saying so.
     67 * xattr file: Since we don't cache xattrs, we can't tell. We always include
     68 *             blocks for it.
     69 *
     70 * However, since root and dir can be created between calls - YOU MUST SAVE
     71 * THIS VALUE.
     72 */
     73static inline size_t reiserfs_xattr_jcreate_nblocks(struct inode *inode)
     74{
     75	size_t nblocks = JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb);
     76
     77	if ((REISERFS_I(inode)->i_flags & i_has_xattr_dir) == 0) {
     78		nblocks += JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb);
     79		if (d_really_is_negative(REISERFS_SB(inode->i_sb)->xattr_root))
     80			nblocks += JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb);
     81	}
     82
     83	return nblocks;
     84}
     85
     86static inline void reiserfs_init_xattr_rwsem(struct inode *inode)
     87{
     88	init_rwsem(&REISERFS_I(inode)->i_xattr_sem);
     89}
     90
     91#else
     92
     93#define reiserfs_listxattr NULL
     94
     95static inline void reiserfs_init_xattr_rwsem(struct inode *inode)
     96{
     97}
     98#endif  /*  CONFIG_REISERFS_FS_XATTR  */
     99
    100#ifndef CONFIG_REISERFS_FS_SECURITY
    101static inline int reiserfs_security_init(struct inode *dir,
    102					 struct inode *inode,
    103					 const struct qstr *qstr,
    104					 struct reiserfs_security_handle *sec)
    105{
    106	return 0;
    107}
    108static inline int
    109reiserfs_security_write(struct reiserfs_transaction_handle *th,
    110			struct inode *inode,
    111			struct reiserfs_security_handle *sec)
    112{
    113	return 0;
    114}
    115static inline void reiserfs_security_free(struct reiserfs_security_handle *sec)
    116{}
    117#endif