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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 mnt_idmap *idmap,20 struct inode *inode, int mask);21 22#ifdef CONFIG_REISERFS_FS_XATTR23#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_SECURITY36int 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#endif44 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 flag66 * saying so.67 * xattr file: Since we don't cache xattrs, we can't tell. We always include68 * blocks for it.69 *70 * However, since root and dir can be created between calls - YOU MUST SAVE71 * 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#else92 93#define reiserfs_listxattr NULL94 95static inline void reiserfs_init_xattr_rwsem(struct inode *inode)96{97}98#endif /* CONFIG_REISERFS_FS_XATTR */99 100#ifndef CONFIG_REISERFS_FS_SECURITY101static 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 int109reiserfs_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#endif118