1 // SPDX-License-Identifier: GPL-2.0
3 * linux/fs/ext4/symlink.c
5 * Only fast symlinks left here - the rest is done by generic code. AV, 1999
7 * Copyright (C) 1992, 1993, 1994, 1995
8 * Remy Card (card@masi.ibp.fr)
9 * Laboratoire MASI - Institut Blaise Pascal
10 * Universite Pierre et Marie Curie (Paris VI)
14 * linux/fs/minix/symlink.c
16 * Copyright (C) 1991, 1992 Linus Torvalds
18 * ext4 symlink handling code
22 #include <linux/namei.h>
26 static const char *ext4_encrypted_get_link(struct dentry
*dentry
,
28 struct delayed_call
*done
)
30 struct page
*cpage
= NULL
;
32 unsigned int max_size
;
36 return ERR_PTR(-ECHILD
);
38 if (ext4_inode_is_fast_symlink(inode
)) {
39 caddr
= EXT4_I(inode
)->i_data
;
40 max_size
= sizeof(EXT4_I(inode
)->i_data
);
42 cpage
= read_mapping_page(inode
->i_mapping
, 0, NULL
);
44 return ERR_CAST(cpage
);
45 caddr
= page_address(cpage
);
46 max_size
= inode
->i_sb
->s_blocksize
;
49 paddr
= fscrypt_get_symlink(inode
, caddr
, max_size
, done
);
55 static int ext4_encrypted_symlink_getattr(struct user_namespace
*mnt_userns
,
56 const struct path
*path
,
57 struct kstat
*stat
, u32 request_mask
,
58 unsigned int query_flags
)
60 ext4_getattr(mnt_userns
, path
, stat
, request_mask
, query_flags
);
62 return fscrypt_symlink_getattr(path
, stat
);
65 const struct inode_operations ext4_encrypted_symlink_inode_operations
= {
66 .get_link
= ext4_encrypted_get_link
,
67 .setattr
= ext4_setattr
,
68 .getattr
= ext4_encrypted_symlink_getattr
,
69 .listxattr
= ext4_listxattr
,
72 const struct inode_operations ext4_symlink_inode_operations
= {
73 .get_link
= page_get_link
,
74 .setattr
= ext4_setattr
,
75 .getattr
= ext4_getattr
,
76 .listxattr
= ext4_listxattr
,
79 const struct inode_operations ext4_fast_symlink_inode_operations
= {
80 .get_link
= simple_get_link
,
81 .setattr
= ext4_setattr
,
82 .getattr
= ext4_getattr
,
83 .listxattr
= ext4_listxattr
,