134 lines
3.9 KiB
C
134 lines
3.9 KiB
C
/*
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File: linux/reiserfs_xattr.h
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*/
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#include <linux/xattr.h>
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/* Magic value in header */
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#define REISERFS_XATTR_MAGIC 0x52465841 /* "RFXA" */
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struct reiserfs_xattr_header {
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__le32 h_magic; /* magic number for identification */
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__le32 h_hash; /* hash of the value */
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};
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#ifdef __KERNEL__
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#include <linux/init.h>
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struct reiserfs_xattr_handler {
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char *prefix;
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int (*init) (void);
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void (*exit) (void);
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int (*get) (struct inode * inode, const char *name, void *buffer,
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size_t size);
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int (*set) (struct inode * inode, const char *name, const void *buffer,
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size_t size, int flags);
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int (*del) (struct inode * inode, const char *name);
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int (*list) (struct inode * inode, const char *name, int namelen,
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char *out);
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struct list_head handlers;
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};
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#ifdef CONFIG_REISERFS_FS_XATTR
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#define is_reiserfs_priv_object(inode) IS_PRIVATE(inode)
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#define has_xattr_dir(inode) (REISERFS_I(inode)->i_flags & i_has_xattr_dir)
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ssize_t reiserfs_getxattr(struct dentry *dentry, const char *name,
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void *buffer, size_t size);
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int reiserfs_setxattr(struct dentry *dentry, const char *name,
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const void *value, size_t size, int flags);
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ssize_t reiserfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
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int reiserfs_removexattr(struct dentry *dentry, const char *name);
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int reiserfs_delete_xattrs(struct inode *inode);
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int reiserfs_chown_xattrs(struct inode *inode, struct iattr *attrs);
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int reiserfs_xattr_init(struct super_block *sb, int mount_flags);
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int reiserfs_permission(struct inode *inode, int mask, struct nameidata *nd);
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int reiserfs_xattr_del(struct inode *, const char *);
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int reiserfs_xattr_get(const struct inode *, const char *, void *, size_t);
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int reiserfs_xattr_set(struct inode *, const char *, const void *, size_t, int);
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extern struct reiserfs_xattr_handler user_handler;
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extern struct reiserfs_xattr_handler trusted_handler;
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#ifdef CONFIG_REISERFS_FS_SECURITY
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extern struct reiserfs_xattr_handler security_handler;
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#endif
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int reiserfs_xattr_register_handlers(void) __init;
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void reiserfs_xattr_unregister_handlers(void);
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static inline void reiserfs_write_lock_xattrs(struct super_block *sb)
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{
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down_write(&REISERFS_XATTR_DIR_SEM(sb));
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}
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static inline void reiserfs_write_unlock_xattrs(struct super_block *sb)
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{
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up_write(&REISERFS_XATTR_DIR_SEM(sb));
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}
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static inline void reiserfs_read_lock_xattrs(struct super_block *sb)
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{
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down_read(&REISERFS_XATTR_DIR_SEM(sb));
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}
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static inline void reiserfs_read_unlock_xattrs(struct super_block *sb)
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{
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up_read(&REISERFS_XATTR_DIR_SEM(sb));
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}
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static inline void reiserfs_write_lock_xattr_i(struct inode *inode)
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{
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down_write(&REISERFS_I(inode)->xattr_sem);
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}
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static inline void reiserfs_write_unlock_xattr_i(struct inode *inode)
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{
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up_write(&REISERFS_I(inode)->xattr_sem);
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}
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static inline void reiserfs_read_lock_xattr_i(struct inode *inode)
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{
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down_read(&REISERFS_I(inode)->xattr_sem);
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}
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static inline void reiserfs_read_unlock_xattr_i(struct inode *inode)
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{
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up_read(&REISERFS_I(inode)->xattr_sem);
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}
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static inline void reiserfs_mark_inode_private(struct inode *inode)
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{
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inode->i_flags |= S_PRIVATE;
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}
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#else
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#define is_reiserfs_priv_object(inode) 0
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#define reiserfs_mark_inode_private(inode) do {;} while(0)
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#define reiserfs_getxattr NULL
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#define reiserfs_setxattr NULL
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#define reiserfs_listxattr NULL
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#define reiserfs_removexattr NULL
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#define reiserfs_write_lock_xattrs(sb) do {;} while(0)
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#define reiserfs_write_unlock_xattrs(sb) do {;} while(0)
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#define reiserfs_read_lock_xattrs(sb)
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#define reiserfs_read_unlock_xattrs(sb)
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#define reiserfs_permission NULL
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#define reiserfs_xattr_register_handlers() 0
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#define reiserfs_xattr_unregister_handlers()
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static inline int reiserfs_delete_xattrs(struct inode *inode)
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{
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return 0;
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};
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static inline int reiserfs_chown_xattrs(struct inode *inode,
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struct iattr *attrs)
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{
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return 0;
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};
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static inline int reiserfs_xattr_init(struct super_block *sb, int mount_flags)
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{
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sb->s_flags = (sb->s_flags & ~MS_POSIXACL); /* to be sure */
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return 0;
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};
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#endif
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#endif /* __KERNEL__ */
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