From: Christian Brauner <brauner@kernel.org>
To: Luis Henriques <lhenriques@suse.de>
Cc: Theodore Ts'o <tytso@mit.edu>,
Andreas Dilger <adilger.kernel@dilger.ca>,
Alexander Viro <viro@zeniv.linux.org.uk>,
Jan Kara <jack@suse.cz>, Miklos Szeredi <miklos@szeredi.hu>,
Amir Goldstein <amir73il@gmail.com>,
linux-ext4@vger.kernel.org, linux-fsdevel@vger.kernel.org,
linux-unionfs@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/3] fs_parser: handle parameters that can be empty and don't have a value
Date: Fri, 1 Mar 2024 14:31:49 +0100 [thread overview]
Message-ID: <20240301-gegossen-seestern-683681ea75d1@brauner> (raw)
In-Reply-To: <20240229163011.16248-2-lhenriques@suse.de>
On Thu, Feb 29, 2024 at 04:30:08PM +0000, Luis Henriques wrote:
> Currently, only parameters that have the fs_parameter_spec 'type' set to
> NULL are handled as 'flag' types. However, parameters that have the
> 'fs_param_can_be_empty' flag set and their value is NULL should also be
> handled as 'flag' type, as their type is set to 'fs_value_is_flag'.
>
> Signed-off-by: Luis Henriques <lhenriques@suse.de>
> ---
> fs/fs_parser.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/fs/fs_parser.c b/fs/fs_parser.c
> index edb3712dcfa5..53f6cb98a3e0 100644
> --- a/fs/fs_parser.c
> +++ b/fs/fs_parser.c
> @@ -119,7 +119,8 @@ int __fs_parse(struct p_log *log,
> /* Try to turn the type we were given into the type desired by the
> * parameter and give an error if we can't.
> */
> - if (is_flag(p)) {
> + if (is_flag(p) ||
> + (!param->string && (p->flags & fs_param_can_be_empty))) {
> if (param->type != fs_value_is_flag)
> return inval_plog(log, "Unexpected value for '%s'",
> param->key);
If the parameter was derived from FSCONFIG_SET_STRING in fsconfig() then
param->string is guaranteed to not be NULL. So really this is only
about:
FSCONFIG_SET_FD
FSCONFIG_SET_BINARY
FSCONFIG_SET_PATH
FSCONFIG_SET_PATH_EMPTY
and those values being used without a value. What filesystem does this?
I don't see any.
The tempting thing to do here is to to just remove fs_param_can_be_empty
from every helper that isn't fs_param_is_string() until we actually have
a filesystem that wants to use any of the above as flags. Will lose a
lot of code that isn't currently used.
next prev parent reply other threads:[~2024-03-01 13:31 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-29 16:30 [PATCH 0/3] fs_parser: handle parameters that can be empty and don't have a value Luis Henriques
2024-02-29 16:30 ` [PATCH 1/3] " Luis Henriques
2024-03-01 13:31 ` Christian Brauner [this message]
2024-03-01 15:45 ` Luis Henriques
2024-03-02 11:46 ` Christian Brauner
2024-03-02 17:56 ` Christian Brauner
2024-03-03 21:31 ` Luis Henriques
2024-03-04 9:04 ` Christian Brauner
2024-03-03 21:17 ` Luis Henriques
2024-03-07 15:13 ` Jan Kara
2024-03-08 9:53 ` Christian Brauner
2024-03-08 10:12 ` Luis Henriques
2024-03-08 23:09 ` Jan Kara
2024-03-11 10:26 ` Luis Henriques
2024-03-11 16:01 ` Jan Kara
2024-02-29 16:30 ` [PATCH 2/3] ext4: fix mount parameters check for empty values Luis Henriques
2024-03-01 13:36 ` Christian Brauner
2024-03-01 15:47 ` Luis Henriques
2024-02-29 16:30 ` [PATCH 3/3] overlay: " Luis Henriques
2024-03-01 13:37 ` Christian Brauner
2024-03-01 13:12 ` [PATCH 0/3] fs_parser: handle parameters that can be empty and don't have a value Christian Brauner
2024-03-01 14:54 ` Eric Sandeen
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