From: Chandan Rajendra <chandan@linux.ibm.com>
To: Eric Biggers <ebiggers@kernel.org>
Cc: linux-fscrypt@vger.kernel.org, linux-ext4@vger.kernel.org,
linux-f2fs-devel@lists.sourceforge.net,
linux-mtd@lists.infradead.org, linux-fsdevel@vger.kernel.org
Subject: Re: [PATCH 01/13] fscrypt: simplify bounce page handling
Date: Thu, 02 May 2019 20:40:34 +0530 [thread overview]
Message-ID: <3273903.Njs8gtEjer@localhost.localdomain> (raw)
In-Reply-To: <20190501224515.43059-2-ebiggers@kernel.org>
On Thursday, May 2, 2019 4:15:03 AM IST Eric Biggers wrote:
> From: Eric Biggers <ebiggers@google.com>
>
> Currently, bounce page handling for writes to encrypted files is
> unnecessarily complicated. A fscrypt_ctx is allocated along with each
> bounce page, page_private(bounce_page) points to this fscrypt_ctx, and
> fscrypt_ctx::w::control_page points to the original pagecache page.
>
> However, because writes don't use the fscrypt_ctx for anything else,
> there's no reason why page_private(bounce_page) can't just point to the
> original pagecache page directly.
>
> Therefore, this patch makes this change. In the process, it also cleans
> up the API exposed to filesystems that allows testing whether a page is
> a bounce page, getting the pagecache page from a bounce page, and
> freeing a bounce page.
Looks good to me,
Reviewed-by: Chandan Rajendra <chandan@linux.ibm.com>
--
chandan
next prev parent reply other threads:[~2019-05-02 15:09 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-01 22:45 [PATCH 00/13] fscrypt, ext4: prepare for blocksize != PAGE_SIZE Eric Biggers
2019-05-01 22:45 ` [PATCH 01/13] fscrypt: simplify bounce page handling Eric Biggers
2019-05-02 15:10 ` Chandan Rajendra [this message]
2019-05-01 22:45 ` [PATCH 02/13] fscrypt: remove the "write" part of struct fscrypt_ctx Eric Biggers
2019-05-02 15:11 ` Chandan Rajendra
2019-05-01 22:45 ` [PATCH 03/13] fscrypt: rename fscrypt_do_page_crypto() to fscrypt_crypt_block() Eric Biggers
2019-05-02 15:43 ` Chandan Rajendra
2019-05-01 22:45 ` [PATCH 04/13] fscrypt: clean up some BUG_ON()s in block encryption/decryption Eric Biggers
2019-05-06 8:24 ` Chandan Rajendra
2019-05-01 22:45 ` [PATCH 05/13] fscrypt: introduce fscrypt_encrypt_block_inplace() Eric Biggers
2019-05-06 8:37 ` Chandan Rajendra
2019-05-01 22:45 ` [PATCH 06/13] fscrypt: support encrypting multiple filesystem blocks per page Eric Biggers
2019-05-06 8:38 ` Chandan Rajendra
2019-05-01 22:45 ` [PATCH 07/13] fscrypt: handle blocksize < PAGE_SIZE in fscrypt_zeroout_range() Eric Biggers
2019-05-06 8:42 ` Chandan Rajendra
2019-05-01 22:45 ` [PATCH 08/13] fscrypt: introduce fscrypt_decrypt_block_inplace() Eric Biggers
2019-05-06 9:01 ` Chandan Rajendra
2019-05-01 22:45 ` [PATCH 09/13] fscrypt: support decrypting multiple filesystem blocks per page Eric Biggers
2019-05-06 9:09 ` Chandan Rajendra
2019-05-01 22:45 ` [PATCH 10/13] ext4: clear BH_Uptodate flag on decryption error Eric Biggers
2019-05-01 22:45 ` [PATCH 11/13] ext4: decrypt only the needed blocks in ext4_block_write_begin() Eric Biggers
2019-05-01 22:45 ` [PATCH 12/13] ext4: decrypt only the needed block in __ext4_block_zero_page_range() Eric Biggers
2019-05-01 22:45 ` [PATCH 13/13] ext4: encrypt only up to last block in ext4_bio_write_page() Eric Biggers
2019-05-06 9:12 ` Chandan Rajendra
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