b24413180f560 (Greg Kroah-Hartman 2017-11-01 15:07:57 +0100 1) /* SPDX-License-Identifier: GPL-2.0 */
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 2) /*
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 3) File: fs/ext2/acl.h
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 4)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 5) (C) 2001 Andreas Gruenbacher, <a.gruenbacher@computer.org>
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 6) */
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 7)
9a59f452abe11 (Christoph Hellwig 2005-06-23 00:10:19 -0700 8) #include <linux/posix_acl_xattr.h>
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 9)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 10) #define EXT2_ACL_VERSION 0x0001
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 11)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 12) typedef struct {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 13) __le16 e_tag;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 14) __le16 e_perm;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 15) __le32 e_id;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 16) } ext2_acl_entry;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 17)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 18) typedef struct {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 19) __le16 e_tag;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 20) __le16 e_perm;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 21) } ext2_acl_entry_short;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 22)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 23) typedef struct {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 24) __le32 a_version;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 25) } ext2_acl_header;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 26)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 27) static inline size_t ext2_acl_size(int count)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 28) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 29) if (count <= 4) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 30) return sizeof(ext2_acl_header) +
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 31) count * sizeof(ext2_acl_entry_short);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 32) } else {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 33) return sizeof(ext2_acl_header) +
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 34) 4 * sizeof(ext2_acl_entry_short) +
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 35) (count - 4) * sizeof(ext2_acl_entry);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 36) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 37) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 38)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 39) static inline int ext2_acl_count(size_t size)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 40) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 41) ssize_t s;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 42) size -= sizeof(ext2_acl_header);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 43) s = size - 4 * sizeof(ext2_acl_entry_short);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 44) if (s < 0) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 45) if (size % sizeof(ext2_acl_entry_short))
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 46) return -1;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 47) return size / sizeof(ext2_acl_entry_short);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 48) } else {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 49) if (s % sizeof(ext2_acl_entry))
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 50) return -1;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 51) return s / sizeof(ext2_acl_entry) + 4;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 52) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 53) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 54)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 55) #ifdef CONFIG_EXT2_FS_POSIX_ACL
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 56)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 57) /* acl.c */
4e34e719e457f (Christoph Hellwig 2011-07-23 17:37:31 +0200 58) extern struct posix_acl *ext2_get_acl(struct inode *inode, int type);
549c7297717c3 (Christian Brauner 2021-01-21 14:19:43 +0100 59) extern int ext2_set_acl(struct user_namespace *mnt_userns, struct inode *inode,
549c7297717c3 (Christian Brauner 2021-01-21 14:19:43 +0100 60) struct posix_acl *acl, int type);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 61) extern int ext2_init_acl (struct inode *, struct inode *);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 62)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 63) #else
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 64) #include <linux/sched.h>
4e34e719e457f (Christoph Hellwig 2011-07-23 17:37:31 +0200 65) #define ext2_get_acl NULL
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 66) #define ext2_set_acl NULL
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 67)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 68) static inline int ext2_init_acl (struct inode *inode, struct inode *dir)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 69) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 70) return 0;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 71) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 72) #endif
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 73)
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