Linux-Fsdevel Archive on lore.kernel.org
 help / color / Atom feed
From: Al Viro <viro@zeniv.linux.org.uk>
To: Daniel Rosenberg <drosen@google.com>
Cc: Theodore Ts'o <tytso@mit.edu>,
	linux-ext4@vger.kernel.org, Jaegeuk Kim <jaegeuk@kernel.org>,
	Chao Yu <chao@kernel.org>,
	linux-f2fs-devel@lists.sourceforge.net,
	Eric Biggers <ebiggers@kernel.org>,
	linux-fscrypt@vger.kernel.org,
	Richard Weinberger <richard@nod.at>,
	linux-mtd@lists.infradead.org,
	Andreas Dilger <adilger.kernel@dilger.ca>,
	Jonathan Corbet <corbet@lwn.net>,
	linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-fsdevel@vger.kernel.org,
	Gabriel Krisman Bertazi <krisman@collabora.com>,
	kernel-team@android.com
Subject: Re: [PATCH v7 2/8] fs: Add standard casefolding support
Date: Sat, 8 Feb 2020 02:12:16 +0000
Message-ID: <20200208021216.GE23230@ZenIV.linux.org.uk> (raw)
In-Reply-To: <20200208013552.241832-3-drosen@google.com>

On Fri, Feb 07, 2020 at 05:35:46PM -0800, Daniel Rosenberg wrote:

> +int generic_ci_d_compare(const struct dentry *dentry, unsigned int len,
> +			  const char *str, const struct qstr *name)
> +{
> +	const struct dentry *parent = READ_ONCE(dentry->d_parent);
> +	const struct inode *inode = READ_ONCE(parent->d_inode);
> +	const struct super_block *sb = dentry->d_sb;
> +	const struct unicode_map *um = sb->s_encoding;
> +	struct qstr entry = QSTR_INIT(str, len);
> +	int ret;
> +
> +	if (!inode || !needs_casefold(inode))
> +		goto fallback;
> +
> +	ret = utf8_strncasecmp(um, name, &entry);

Again, is that safe in case when the contents of the string str points to
keeps changing under you?

  reply index

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-08  1:35 [PATCH v7 0/8] Support fof Casefolding and Encryption Daniel Rosenberg
2020-02-08  1:35 ` [PATCH v7 1/8] unicode: Add utf8_casefold_iter Daniel Rosenberg
2020-02-12  3:38   ` Eric Biggers
2020-02-14 21:47     ` Daniel Rosenberg
2020-02-17 19:02       ` Gabriel Krisman Bertazi
2020-02-08  1:35 ` [PATCH v7 2/8] fs: Add standard casefolding support Daniel Rosenberg
2020-02-08  2:12   ` Al Viro [this message]
2020-02-10 23:11     ` Daniel Rosenberg
2020-02-10 23:42       ` Al Viro
2020-02-12  6:34         ` Eric Biggers
2020-02-12  6:57           ` Eric Biggers
2020-02-20  2:27             ` Daniel Rosenberg
2020-02-12  3:55   ` Eric Biggers
2020-02-08  1:35 ` [PATCH v7 3/8] f2fs: Use generic " Daniel Rosenberg
2020-02-12  4:05   ` Eric Biggers
2020-02-08  1:35 ` [PATCH v7 4/8] ext4: " Daniel Rosenberg
2020-02-08  1:35 ` [PATCH v7 5/8] fscrypt: Have filesystems handle their d_ops Daniel Rosenberg
2020-02-12  4:33   ` Eric Biggers
2020-02-08  1:35 ` [PATCH v7 6/8] f2fs: Handle casefolding with Encryption Daniel Rosenberg
2020-02-12  5:10   ` Eric Biggers
2020-02-12  5:55     ` Al Viro
2020-02-12  6:06       ` Eric Biggers
2020-02-12  5:47   ` Eric Biggers
2020-02-08  1:35 ` [PATCH v7 7/8] ext4: Hande casefolding with encryption Daniel Rosenberg
2020-02-12  5:59   ` Eric Biggers
2020-02-08  1:35 ` [PATCH v7 8/8] ext4: Optimize match for casefolded encrypted dirs Daniel Rosenberg
2020-02-12  6:12 ` [PATCH v7 0/8] Support fof Casefolding and Encryption Eric Biggers
2020-02-13  0:01   ` Daniel Rosenberg

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20200208021216.GE23230@ZenIV.linux.org.uk \
    --to=viro@zeniv.linux.org.uk \
    --cc=adilger.kernel@dilger.ca \
    --cc=chao@kernel.org \
    --cc=corbet@lwn.net \
    --cc=drosen@google.com \
    --cc=ebiggers@kernel.org \
    --cc=jaegeuk@kernel.org \
    --cc=kernel-team@android.com \
    --cc=krisman@collabora.com \
    --cc=linux-doc@vger.kernel.org \
    --cc=linux-ext4@vger.kernel.org \
    --cc=linux-f2fs-devel@lists.sourceforge.net \
    --cc=linux-fscrypt@vger.kernel.org \
    --cc=linux-fsdevel@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-mtd@lists.infradead.org \
    --cc=richard@nod.at \
    --cc=tytso@mit.edu \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

Linux-Fsdevel Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/linux-fsdevel/0 linux-fsdevel/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 linux-fsdevel linux-fsdevel/ https://lore.kernel.org/linux-fsdevel \
		linux-fsdevel@vger.kernel.org
	public-inbox-index linux-fsdevel

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.linux-fsdevel


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git