51 lines
1.1 KiB
C
51 lines
1.1 KiB
C
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/*
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File: linux/xattr_acl.h
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(extended attribute representation of access control lists)
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(C) 2000 Andreas Gruenbacher, <a.gruenbacher@computer.org>
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*/
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#ifndef _LINUX_XATTR_ACL_H
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#define _LINUX_XATTR_ACL_H
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#include <linux/posix_acl.h>
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#define XATTR_NAME_ACL_ACCESS "system.posix_acl_access"
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#define XATTR_NAME_ACL_DEFAULT "system.posix_acl_default"
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#define XATTR_ACL_VERSION 0x0002
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typedef struct {
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__u16 e_tag;
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__u16 e_perm;
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__u32 e_id;
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} xattr_acl_entry;
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typedef struct {
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__u32 a_version;
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xattr_acl_entry a_entries[0];
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} xattr_acl_header;
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static inline size_t xattr_acl_size(int count)
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{
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return sizeof(xattr_acl_header) + count * sizeof(xattr_acl_entry);
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}
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static inline int xattr_acl_count(size_t size)
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{
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if (size < sizeof(xattr_acl_header))
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return -1;
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size -= sizeof(xattr_acl_header);
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if (size % sizeof(xattr_acl_entry))
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return -1;
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return size / sizeof(xattr_acl_entry);
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}
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struct posix_acl * posix_acl_from_xattr(const void *value, size_t size);
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int posix_acl_to_xattr(const struct posix_acl *acl, void *buffer, size_t size);
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#endif /* _LINUX_XATTR_ACL_H */
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