f51667685749e (Theodore Ts'o 2017-12-17 22:00:59 -0500 1) // SPDX-License-Identifier: GPL-2.0
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 2) /*
617ba13b31fbf (Mingming Cao 2006-10-11 01:20:53 -0700 3) File: fs/ext4/acl.h
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 4)
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 5) (C) 2001 Andreas Gruenbacher, <a.gruenbacher@computer.org>
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 6) */
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 7)
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 8) #include <linux/posix_acl_xattr.h>
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 9)
617ba13b31fbf (Mingming Cao 2006-10-11 01:20:53 -0700 10) #define EXT4_ACL_VERSION 0x0001
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 11)
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 12) typedef struct {
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 13) __le16 e_tag;
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 14) __le16 e_perm;
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 15) __le32 e_id;
617ba13b31fbf (Mingming Cao 2006-10-11 01:20:53 -0700 16) } ext4_acl_entry;
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 17)
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 18) typedef struct {
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 19) __le16 e_tag;
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 20) __le16 e_perm;
617ba13b31fbf (Mingming Cao 2006-10-11 01:20:53 -0700 21) } ext4_acl_entry_short;
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 22)
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 23) typedef struct {
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 24) __le32 a_version;
617ba13b31fbf (Mingming Cao 2006-10-11 01:20:53 -0700 25) } ext4_acl_header;
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 26)
617ba13b31fbf (Mingming Cao 2006-10-11 01:20:53 -0700 27) static inline size_t ext4_acl_size(int count)
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 28) {
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 29) if (count <= 4) {
617ba13b31fbf (Mingming Cao 2006-10-11 01:20:53 -0700 30) return sizeof(ext4_acl_header) +
617ba13b31fbf (Mingming Cao 2006-10-11 01:20:53 -0700 31) count * sizeof(ext4_acl_entry_short);
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 32) } else {
617ba13b31fbf (Mingming Cao 2006-10-11 01:20:53 -0700 33) return sizeof(ext4_acl_header) +
617ba13b31fbf (Mingming Cao 2006-10-11 01:20:53 -0700 34) 4 * sizeof(ext4_acl_entry_short) +
617ba13b31fbf (Mingming Cao 2006-10-11 01:20:53 -0700 35) (count - 4) * sizeof(ext4_acl_entry);
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 36) }
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 37) }
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 38)
617ba13b31fbf (Mingming Cao 2006-10-11 01:20:53 -0700 39) static inline int ext4_acl_count(size_t size)
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 40) {
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 41) ssize_t s;
617ba13b31fbf (Mingming Cao 2006-10-11 01:20:53 -0700 42) size -= sizeof(ext4_acl_header);
617ba13b31fbf (Mingming Cao 2006-10-11 01:20:53 -0700 43) s = size - 4 * sizeof(ext4_acl_entry_short);
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 44) if (s < 0) {
617ba13b31fbf (Mingming Cao 2006-10-11 01:20:53 -0700 45) if (size % sizeof(ext4_acl_entry_short))
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 46) return -1;
617ba13b31fbf (Mingming Cao 2006-10-11 01:20:53 -0700 47) return size / sizeof(ext4_acl_entry_short);
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 48) } else {
617ba13b31fbf (Mingming Cao 2006-10-11 01:20:53 -0700 49) if (s % sizeof(ext4_acl_entry))
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 50) return -1;
617ba13b31fbf (Mingming Cao 2006-10-11 01:20:53 -0700 51) return s / sizeof(ext4_acl_entry) + 4;
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 52) }
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 53) }
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 54)
03010a3350301 (Theodore Ts'o 2008-10-10 20:02:48 -0400 55) #ifdef CONFIG_EXT4_FS_POSIX_ACL
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 56)
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 57) /* acl.c */
4e34e719e457f (Christoph Hellwig 2011-07-23 17:37:31 +0200 58) struct posix_acl *ext4_get_acl(struct inode *inode, int type);
549c7297717c3 (Christian Brauner 2021-01-21 14:19:43 +0100 59) int ext4_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);
af5bc92dded4d (Theodore Ts'o 2008-09-08 22:25:24 -0400 61) extern int ext4_init_acl(handle_t *, struct inode *, struct inode *);
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 62)
03010a3350301 (Theodore Ts'o 2008-10-10 20:02:48 -0400 63) #else /* CONFIG_EXT4_FS_POSIX_ACL */
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 64) #include <linux/sched.h>
4e34e719e457f (Christoph Hellwig 2011-07-23 17:37:31 +0200 65) #define ext4_get_acl NULL
64e178a7118b1 (Christoph Hellwig 2013-12-20 05:16:44 -0800 66) #define ext4_set_acl NULL
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 67)
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 68) static inline int
617ba13b31fbf (Mingming Cao 2006-10-11 01:20:53 -0700 69) ext4_init_acl(handle_t *handle, struct inode *inode, struct inode *dir)
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 70) {
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 71) return 0;
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 72) }
03010a3350301 (Theodore Ts'o 2008-10-10 20:02:48 -0400 73) #endif /* CONFIG_EXT4_FS_POSIX_ACL */
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 74)
VisionFive2 Linux kernel
StarFive Tech Linux Kernel for VisionFive (JH7110) boards (mirror)
More than 9999 Commits
32 Branches
54 Tags