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Commit 43f54cd5 authored by Jaegeuk Kim's avatar Jaegeuk Kim
Browse files

f2fs crypto: add alloc_bounce_page 



This patch adds alloc_bounce_page likewise ext4.

Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent 7e8e754a

fs/f2fs/crypto.c

+15 −8
Original line number Diff line number Diff line
@@ -376,6 +376,15 @@ static int f2fs_page_crypto(struct f2fs_crypto_ctx *ctx, 
	return 0;

}



static struct page *alloc_bounce_page(struct f2fs_crypto_ctx *ctx)

{

	ctx->w.bounce_page = mempool_alloc(f2fs_bounce_page_pool, GFP_NOWAIT);

	if (ctx->w.bounce_page == NULL)

		return ERR_PTR(-ENOMEM);

	ctx->flags |= F2FS_WRITE_PATH_FL;

	return ctx->w.bounce_page;

}



/**

 * f2fs_encrypt() - Encrypts a page

 * @inode:          The inode for which the encryption should take place
@@ -405,19 +414,17 @@ struct page *f2fs_encrypt(struct inode *inode, 
		return (struct page *)ctx;



	/* The encryption operation will require a bounce page. */

	ciphertext_page = mempool_alloc(f2fs_bounce_page_pool, GFP_NOWAIT);

	if (!ciphertext_page) {

		err = -ENOMEM;

	ciphertext_page = alloc_bounce_page(ctx);

	if (IS_ERR(ciphertext_page))

		goto err_out;

	}



	ctx->flags |= F2FS_WRITE_PATH_FL;

	ctx->w.bounce_page = ciphertext_page;

	ctx->w.control_page = plaintext_page;

	err = f2fs_page_crypto(ctx, inode, F2FS_ENCRYPT, plaintext_page->index,

					plaintext_page, ciphertext_page);

	if (err)

	if (err) {

		ciphertext_page = ERR_PTR(err);

		goto err_out;

	}



	SetPagePrivate(ciphertext_page);

	set_page_private(ciphertext_page, (unsigned long)ctx);
@@ -426,7 +433,7 @@ struct page *f2fs_encrypt(struct inode *inode, 


err_out:

	f2fs_release_crypto_ctx(ctx);

	return ERR_PTR(err);

	return ciphertext_page;

}



/**