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73 lines
1.5 KiB
73 lines
1.5 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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File: fs/ext2/acl.h |
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(C) 2001 Andreas Gruenbacher, <[email protected]> |
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*/ |
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#include <linux/posix_acl_xattr.h> |
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#define EXT2_ACL_VERSION 0x0001 |
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typedef struct { |
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__le16 e_tag; |
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__le16 e_perm; |
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__le32 e_id; |
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} ext2_acl_entry; |
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typedef struct { |
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__le16 e_tag; |
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__le16 e_perm; |
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} ext2_acl_entry_short; |
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typedef struct { |
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__le32 a_version; |
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} ext2_acl_header; |
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static inline size_t ext2_acl_size(int count) |
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{ |
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if (count <= 4) { |
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return sizeof(ext2_acl_header) + |
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count * sizeof(ext2_acl_entry_short); |
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} else { |
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return sizeof(ext2_acl_header) + |
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4 * sizeof(ext2_acl_entry_short) + |
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(count - 4) * sizeof(ext2_acl_entry); |
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} |
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} |
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static inline int ext2_acl_count(size_t size) |
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{ |
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ssize_t s; |
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size -= sizeof(ext2_acl_header); |
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s = size - 4 * sizeof(ext2_acl_entry_short); |
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if (s < 0) { |
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if (size % sizeof(ext2_acl_entry_short)) |
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return -1; |
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return size / sizeof(ext2_acl_entry_short); |
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} else { |
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if (s % sizeof(ext2_acl_entry)) |
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return -1; |
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return s / sizeof(ext2_acl_entry) + 4; |
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} |
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} |
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#ifdef CONFIG_EXT2_FS_POSIX_ACL |
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/* acl.c */ |
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extern struct posix_acl *ext2_get_acl(struct inode *inode, int type); |
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extern int ext2_set_acl(struct user_namespace *mnt_userns, struct inode *inode, |
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struct posix_acl *acl, int type); |
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extern int ext2_init_acl (struct inode *, struct inode *); |
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#else |
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#include <linux/sched.h> |
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#define ext2_get_acl NULL |
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#define ext2_set_acl NULL |
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static inline int ext2_init_acl (struct inode *inode, struct inode *dir) |
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{ |
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return 0; |
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} |
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#endif |
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