^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /* SPDX-License-Identifier: GPL-2.0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) File: linux/ext2_xattr.h
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) On-disk format of extended attributes for the ext2 filesystem.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) (C) 2001 Andreas Gruenbacher, <a.gruenbacher@computer.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/xattr.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) /* Magic value in attribute blocks */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #define EXT2_XATTR_MAGIC 0xEA020000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) /* Maximum number of references to one attribute block */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #define EXT2_XATTR_REFCOUNT_MAX 1024
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) /* Name indexes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #define EXT2_XATTR_INDEX_USER 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #define EXT2_XATTR_INDEX_POSIX_ACL_ACCESS 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #define EXT2_XATTR_INDEX_POSIX_ACL_DEFAULT 3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #define EXT2_XATTR_INDEX_TRUSTED 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #define EXT2_XATTR_INDEX_LUSTRE 5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #define EXT2_XATTR_INDEX_SECURITY 6
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) struct ext2_xattr_header {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) __le32 h_magic; /* magic number for identification */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) __le32 h_refcount; /* reference count */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) __le32 h_blocks; /* number of disk blocks used */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) __le32 h_hash; /* hash value of all attributes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) __u32 h_reserved[4]; /* zero right now */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) struct ext2_xattr_entry {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) __u8 e_name_len; /* length of name */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) __u8 e_name_index; /* attribute name index */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) __le16 e_value_offs; /* offset in disk block of value */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) __le32 e_value_block; /* disk block attribute is stored on (n/i) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) __le32 e_value_size; /* size of attribute value */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) __le32 e_hash; /* hash value of name and value */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) char e_name[]; /* attribute name */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) #define EXT2_XATTR_PAD_BITS 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #define EXT2_XATTR_PAD (1<<EXT2_XATTR_PAD_BITS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) #define EXT2_XATTR_ROUND (EXT2_XATTR_PAD-1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) #define EXT2_XATTR_LEN(name_len) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) (((name_len) + EXT2_XATTR_ROUND + \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) sizeof(struct ext2_xattr_entry)) & ~EXT2_XATTR_ROUND)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) #define EXT2_XATTR_NEXT(entry) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) ( (struct ext2_xattr_entry *)( \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) (char *)(entry) + EXT2_XATTR_LEN((entry)->e_name_len)) )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) #define EXT2_XATTR_SIZE(size) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) (((size) + EXT2_XATTR_ROUND) & ~EXT2_XATTR_ROUND)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) struct mb_cache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) # ifdef CONFIG_EXT2_FS_XATTR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) extern const struct xattr_handler ext2_xattr_user_handler;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) extern const struct xattr_handler ext2_xattr_trusted_handler;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) extern const struct xattr_handler ext2_xattr_security_handler;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) extern ssize_t ext2_listxattr(struct dentry *, char *, size_t);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) extern int ext2_xattr_get(struct inode *, int, const char *, void *, size_t);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) extern int ext2_xattr_set(struct inode *, int, const char *, const void *, size_t, int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) extern void ext2_xattr_delete_inode(struct inode *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) extern struct mb_cache *ext2_xattr_create_cache(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) extern void ext2_xattr_destroy_cache(struct mb_cache *cache);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) extern const struct xattr_handler *ext2_xattr_handlers[];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) # else /* CONFIG_EXT2_FS_XATTR */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) static inline int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) ext2_xattr_get(struct inode *inode, int name_index,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) const char *name, void *buffer, size_t size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) static inline int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) ext2_xattr_set(struct inode *inode, int name_index, const char *name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) const void *value, size_t size, int flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) static inline void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) ext2_xattr_delete_inode(struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) static inline void ext2_xattr_destroy_cache(struct mb_cache *cache)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) #define ext2_xattr_handlers NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) #define ext2_listxattr NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) # endif /* CONFIG_EXT2_FS_XATTR */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) #ifdef CONFIG_EXT2_FS_SECURITY
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) extern int ext2_init_security(struct inode *inode, struct inode *dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) const struct qstr *qstr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) static inline int ext2_init_security(struct inode *inode, struct inode *dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) const struct qstr *qstr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) #endif
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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