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55 lines
1.6 KiB
55 lines
1.6 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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File: linux/posix_acl_xattr.h |
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Extended attribute system call representation of Access Control Lists. |
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Copyright (C) 2000 by Andreas Gruenbacher <a.gruenbacher@computer.org> |
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Copyright (C) 2002 SGI - Silicon Graphics, Inc <linux-xfs@oss.sgi.com> |
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*/ |
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#ifndef _POSIX_ACL_XATTR_H |
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#define _POSIX_ACL_XATTR_H |
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#include <uapi/linux/xattr.h> |
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#include <uapi/linux/posix_acl_xattr.h> |
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#include <linux/posix_acl.h> |
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static inline size_t |
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posix_acl_xattr_size(int count) |
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{ |
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return (sizeof(struct posix_acl_xattr_header) + |
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(count * sizeof(struct posix_acl_xattr_entry))); |
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} |
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static inline int |
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posix_acl_xattr_count(size_t size) |
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{ |
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if (size < sizeof(struct posix_acl_xattr_header)) |
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return -1; |
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size -= sizeof(struct posix_acl_xattr_header); |
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if (size % sizeof(struct posix_acl_xattr_entry)) |
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return -1; |
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return size / sizeof(struct posix_acl_xattr_entry); |
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} |
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#ifdef CONFIG_FS_POSIX_ACL |
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void posix_acl_fix_xattr_from_user(void *value, size_t size); |
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void posix_acl_fix_xattr_to_user(void *value, size_t size); |
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#else |
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static inline void posix_acl_fix_xattr_from_user(void *value, size_t size) |
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{ |
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} |
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static inline void posix_acl_fix_xattr_to_user(void *value, size_t size) |
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{ |
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} |
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#endif |
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struct posix_acl *posix_acl_from_xattr(struct user_namespace *user_ns, |
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const void *value, size_t size); |
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int posix_acl_to_xattr(struct user_namespace *user_ns, |
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const struct posix_acl *acl, void *buffer, size_t size); |
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extern const struct xattr_handler posix_acl_access_xattr_handler; |
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extern const struct xattr_handler posix_acl_default_xattr_handler; |
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#endif /* _POSIX_ACL_XATTR_H */
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