Linux-BTRFS Archive on lore.kernel.org
 help / Atom feed
From: Dennis Zhou <dennis@kernel.org>
To: David Sterba <dsterba@suse.cz>
Cc: David Sterba <dsterba@suse.com>,
	Josef Bacik <josef@toxicpanda.com>, Chris Mason <clm@fb.com>,
	Omar Sandoval <osandov@osandov.com>,
	Nick Terrell <terrelln@fb.com>,
	Nikolay Borisov <nborisov@suse.com>,
	kernel-team@fb.com, linux-btrfs@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH 09/12] btrfs: change set_level() to bound the level passed in
Date: Tue, 5 Feb 2019 14:32:54 -0500
Message-ID: <20190205193254.GB24701@dennisz-mbp.dhcp.thefacebook.com> (raw)
In-Reply-To: <20190205190636.GZ2900@twin.jikos.cz>

On Tue, Feb 05, 2019 at 08:06:37PM +0100, David Sterba wrote:
> On Mon, Feb 04, 2019 at 03:20:05PM -0500, Dennis Zhou wrote:
> > -unsigned int btrfs_compress_str2level(const char *str)
> > +unsigned int btrfs_compress_str2level(unsigned int type, const char *str)
> >  {
> > -	if (strncmp(str, "zlib", 4) != 0)
> > +	unsigned int level;
> > +	int ret;
> > +
> > +	if (!type)
> >  		return 0;
> >  
> > -	/* Accepted form: zlib:1 up to zlib:9 and nothing left after the number */
> > -	if (str[4] == ':' && '1' <= str[5] && str[5] <= '9' && str[6] == 0)
> > -		return str[5] - '0';
> > +	if (str[0] == ':') {
> > +		ret = kstrtouint(str + 1, 10, &level);
> 
> The docs kstrtouint of say that initial + is also accepted, I'd rather
> keep the level specification strict, ie. no "zlib:+3" and no garbage
> after the number.
> 
> The validation is currently missing but I think we should catch levels
> out of range during mount/remount. The fallback to default is a safety
> but wrong specification should be communicated to the user early.

Ok. To make sure I understand properly for improper level (ie "30",
"+3", "+3d") set the level to default (already done) and pr_warn saying
invalid level?

Thanks,
Dennis

  reply index

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-02-04 20:19 [PATCH v2 00/12] btrfs: add zstd compression level support Dennis Zhou
2019-02-04 20:19 ` [PATCH 01/12] btrfs: add helpers for compression type and level Dennis Zhou
2019-02-04 20:19 ` [PATCH 02/12] btrfs: rename workspaces_list to workspace_manager Dennis Zhou
2019-02-04 20:19 ` [PATCH 03/12] btrfs: manage heuristic workspace as index 0 Dennis Zhou
2019-02-04 20:20 ` [PATCH 04/12] btrfs: unify compression ops with workspace_manager Dennis Zhou
2019-02-04 20:20 ` [PATCH 05/12] btrfs: add helper methods for workspace manager init and cleanup Dennis Zhou
2019-02-04 20:20 ` [PATCH 06/12] btrfs: add compression interface in (get/put)_workspace() Dennis Zhou
2019-02-04 20:20 ` [PATCH 07/12] btrfs: move to fn pointers for get/put workspaces Dennis Zhou
2019-02-04 20:20 ` [PATCH 08/12] btrfs: plumb level through the compression interface Dennis Zhou
2019-02-04 20:20 ` [PATCH 09/12] btrfs: change set_level() to bound the level passed in Dennis Zhou
2019-02-05 19:06   ` David Sterba
2019-02-05 19:32     ` Dennis Zhou [this message]
2019-02-05 19:54       ` David Sterba
2019-02-05 19:59         ` Dennis Zhou
2019-02-06 16:48   ` [PATCH v2 " Dennis Zhou
2019-02-04 20:20 ` [PATCH 10/12] btrfs: zstd use the passed through level instead of default Dennis Zhou
2019-02-04 20:20 ` [PATCH 11/12] btrfs: make zstd memory requirements monotonic Dennis Zhou
2019-02-04 20:20 ` [PATCH 12/12] btrfs: add zstd compression level support Dennis Zhou
2019-02-05 19:26   ` [PATCH v2 " Dennis Zhou
2019-02-06 16:47   ` [PATCH v3 " Dennis Zhou
2019-02-05 14:57 ` [PATCH v2 00/12] " David Sterba
2019-02-05 16:03   ` Dennis Zhou
2019-02-05 16:27     ` David Sterba
2019-02-05 16:30       ` Dennis Zhou
2019-02-05 16:51         ` David Sterba
2019-02-05 17:07           ` David Sterba
2019-02-05 18:27             ` David Sterba
2019-02-05 18:30               ` Dennis Zhou
2019-02-05 20:48                 ` Dennis Zhou
2019-02-06 15:15                   ` David Sterba
2019-02-06 16:51                     ` Dennis Zhou
2019-02-07 16:59 ` David Sterba
2019-02-07 17:36   ` Dennis Zhou
2019-02-08 13:22     ` David Sterba

Reply instructions:

You may reply publically 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=20190205193254.GB24701@dennisz-mbp.dhcp.thefacebook.com \
    --to=dennis@kernel.org \
    --cc=clm@fb.com \
    --cc=dsterba@suse.com \
    --cc=dsterba@suse.cz \
    --cc=josef@toxicpanda.com \
    --cc=kernel-team@fb.com \
    --cc=linux-btrfs@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=nborisov@suse.com \
    --cc=osandov@osandov.com \
    --cc=terrelln@fb.com \
    /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-BTRFS Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/linux-btrfs/0 linux-btrfs/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-btrfs linux-btrfs/ https://lore.kernel.org/linux-btrfs \
		linux-btrfs@vger.kernel.org linux-btrfs@archiver.kernel.org
	public-inbox-index linux-btrfs


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


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