static void __fscrypt_decrypt_bio(struct bio *bio, bool done)
{
struct bio_vec *bv;
int i;
bio_for_each_segment_all(bv, bio, i) {
struct page *page = bv->bv_page;
int ret = fscrypt_decrypt_page(page->mapping->host, page,
PAGE_SIZE, 0, page->index);
if (ret) {
WARN_ON_ONCE(1);
SetPageError(page);
} else if (done) {
SetPageUptodate(page);
}
if (done)
unlock_page(page);
}
}
/*
* Call fscrypt_decrypt_page on every single page, reusing the encryption
* context.
*/
static void completion_pages(struct work_struct *work)
{
struct fscrypt_ctx *ctx =
container_of(work, struct fscrypt_ctx, r.work);
struct bio *bio = ctx->r.bio;
struct bio_vec *bv;
int i;
bio_for_each_segment_all(bv, bio, i) {
struct page *page = bv->bv_page;
int ret = fscrypt_decrypt_page(page);
if (ret) {
WARN_ON_ONCE(1);
SetPageError(page);
} else {
SetPageUptodate(page);
}
unlock_page(page);
}
fscrypt_release_ctx(ctx);
bio_put(bio);
}
int ubifs_decrypt(const struct inode *inode, struct ubifs_data_node *dn,
unsigned int *out_len, int block)
{
struct ubifs_info *c = inode->i_sb->s_fs_info;
int err;
unsigned int clen = le16_to_cpu(dn->compr_size);
unsigned int dlen = *out_len;
if (clen <= 0 || clen > UBIFS_BLOCK_SIZE || clen > dlen) {
ubifs_err(c, "bad compr_size: %i", clen);
return -EINVAL;
}
ubifs_assert(dlen <= UBIFS_BLOCK_SIZE);
err = fscrypt_decrypt_page(inode, virt_to_page(&dn->data), dlen,
offset_in_page(&dn->data), block);
if (err) {
ubifs_err(c, "fscrypt_decrypt_page failed: %i", err);
return err;
}
*out_len = clen;
return 0;
}
