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authorEric Biggers <ebiggers@google.com>2018-01-11 23:26:49 -0500
committerTheodore Ts'o <tytso@mit.edu>2018-01-11 23:26:49 -0500
commitf2329cb687d63b73072281aba5646154237b05d2 (patch)
tree787a48ad1dc93ea708b94efda00d575f9a841bba /fs/f2fs/namei.c
parent393c038f5c55efc61aa1412954548a9947a45cd4 (diff)
downloadlinux-f2329cb687d63b73072281aba5646154237b05d2.tar.bz2
f2fs: switch to fscrypt_get_symlink()
Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'fs/f2fs/namei.c')
-rw-r--r--fs/f2fs/namei.c66
1 files changed, 9 insertions, 57 deletions
diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c
index 5b114844806c..37816d2ebb93 100644
--- a/fs/f2fs/namei.c
+++ b/fs/f2fs/namei.c
@@ -1137,68 +1137,20 @@ static const char *f2fs_encrypted_get_link(struct dentry *dentry,
struct inode *inode,
struct delayed_call *done)
{
- struct page *cpage = NULL;
- char *caddr, *paddr = NULL;
- struct fscrypt_str cstr = FSTR_INIT(NULL, 0);
- struct fscrypt_str pstr = FSTR_INIT(NULL, 0);
- struct fscrypt_symlink_data *sd;
- u32 max_size = inode->i_sb->s_blocksize;
- int res;
+ struct page *page;
+ const char *target;
if (!dentry)
return ERR_PTR(-ECHILD);
- res = fscrypt_get_encryption_info(inode);
- if (res)
- return ERR_PTR(res);
-
- cpage = read_mapping_page(inode->i_mapping, 0, NULL);
- if (IS_ERR(cpage))
- return ERR_CAST(cpage);
- caddr = page_address(cpage);
-
- /* Symlink is encrypted */
- sd = (struct fscrypt_symlink_data *)caddr;
- cstr.name = sd->encrypted_path;
- cstr.len = le16_to_cpu(sd->len);
-
- /* this is broken symlink case */
- if (unlikely(cstr.len == 0)) {
- res = -ENOENT;
- goto errout;
- }
-
- if ((cstr.len + sizeof(struct fscrypt_symlink_data) - 1) > max_size) {
- /* Symlink data on the disk is corrupted */
- res = -EIO;
- goto errout;
- }
- res = fscrypt_fname_alloc_buffer(inode, cstr.len, &pstr);
- if (res)
- goto errout;
-
- res = fscrypt_fname_disk_to_usr(inode, 0, 0, &cstr, &pstr);
- if (res)
- goto errout;
-
- /* this is broken symlink case */
- if (unlikely(pstr.name[0] == 0)) {
- res = -ENOENT;
- goto errout;
- }
-
- paddr = pstr.name;
-
- /* Null-terminate the name */
- paddr[pstr.len] = '\0';
+ page = read_mapping_page(inode->i_mapping, 0, NULL);
+ if (IS_ERR(page))
+ return ERR_CAST(page);
- put_page(cpage);
- set_delayed_call(done, kfree_link, paddr);
- return paddr;
-errout:
- fscrypt_fname_free_buffer(&pstr);
- put_page(cpage);
- return ERR_PTR(res);
+ target = fscrypt_get_symlink(inode, page_address(page),
+ inode->i_sb->s_blocksize, done);
+ put_page(page);
+ return target;
}
const struct inode_operations f2fs_encrypted_symlink_inode_operations = {