diff options
Diffstat (limited to 'include/linux/xattr.h')
-rw-r--r-- | include/linux/xattr.h | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/include/linux/xattr.h b/include/linux/xattr.h new file mode 100644 index 00000000..dcdff6e8 --- /dev/null +++ b/include/linux/xattr.h @@ -0,0 +1,78 @@ +/* + File: linux/xattr.h + + Extended attributes handling. + + Copyright (C) 2001 by Andreas Gruenbacher <a.gruenbacher@computer.org> + Copyright (c) 2001-2002 Silicon Graphics, Inc. All Rights Reserved. + Copyright (c) 2004 Red Hat, Inc., James Morris <jmorris@redhat.com> +*/ +#ifndef _LINUX_XATTR_H +#define _LINUX_XATTR_H + + +#include <linux/slab.h> +#include <linux/types.h> +#include <linux/spinlock.h> +#include <uapi/linux/xattr.h> + +#ifndef XATTR_CREATE +#define XATTR_CREATE 0x1 +#endif + +#ifndef XATTR_REPLACE +#define XATTR_REPLACE 0x2 +#endif + +struct inode; +struct dentry; +struct user_namespace; + +/* + * struct xattr_handler: When @name is set, match attributes with exactly that + * name. When @prefix is set instead, match attributes with that prefix and + * with a non-empty suffix. + */ +struct xattr_handler { + const char *name; + const char *prefix; + int flags; /* fs private flags */ + bool (*list)(struct dentry *dentry); + int (*get)(const struct xattr_handler *, struct dentry *dentry, + struct inode *inode, const char *name, void *buffer, + size_t size); + int (*set)(const struct xattr_handler *, + struct mnt_idmap *idmap, struct dentry *dentry, + struct inode *inode, const char *name, const void *buffer, + size_t size, int flags); +}; + +const char *xattr_full_name(const struct xattr_handler *, const char *); + +struct xattr { + const char *name; + void *value; + size_t value_len; +}; + +ssize_t xattr_getsecurity(struct inode *, const char *, void *, size_t); +ssize_t vfs_getxattr(struct dentry *, const char *, void *, size_t); +ssize_t vfs_listxattr(struct dentry *d, char *list, size_t size); +int __vfs_setxattr_noperm(struct dentry *, const char *, const void *, size_t, int); +int vfs_setxattr(struct dentry *, const char *, const void *, size_t, int); +int vfs_removexattr(struct dentry *, const char *); + +ssize_t generic_getxattr(struct dentry *dentry, struct inode *inode, const char *name, void *buffer, size_t size); +ssize_t generic_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size); +int generic_setxattr(struct dentry *dentry, struct inode *inode, + const char *name, const void *value, size_t size, int flags); +int generic_removexattr(struct dentry *dentry, const char *name); +ssize_t vfs_getxattr_alloc(struct dentry *dentry, const char *name, + char **xattr_value, size_t size, gfp_t flags); + +static inline const char *xattr_prefix(const struct xattr_handler *handler) +{ + return handler->prefix ?: handler->name; +} + +#endif /* _LINUX_XATTR_H */ |