From: "Pali Rohár" <pali@kernel.org>
To: Eric Biggers <ebiggers@kernel.org>
Cc: Amir Goldstein <amir73il@gmail.com>,
"Darrick J. Wong" <djwong@kernel.org>,
ronnie sahlberg <ronniesahlberg@gmail.com>,
Chuck Lever <chuck.lever@oracle.com>,
Christian Brauner <brauner@kernel.org>, Jan Kara <jack@suse.cz>,
Steve French <sfrench@samba.org>,
Alexander Viro <viro@zeniv.linux.org.uk>,
linux-fsdevel@vger.kernel.org, linux-cifs@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [RFC PATCH 1/4] fs: Add FS_XFLAG_COMPRESSED & FS_XFLAG_ENCRYPTED for FS_IOC_FS[GS]ETXATTR API
Date: Sun, 16 Feb 2025 19:49:07 +0100 [thread overview]
Message-ID: <20250216184907.wuezls5brv3syosa@pali> (raw)
In-Reply-To: <20250216183432.GA2404@sol.localdomain>
On Sunday 16 February 2025 10:34:32 Eric Biggers wrote:
> On Sun, Feb 16, 2025 at 05:40:26PM +0100, Pali Rohár wrote:
> > This allows to get or set FS_COMPR_FL and FS_ENCRYPT_FL bits via FS_IOC_FSGETXATTR/FS_IOC_FSSETXATTR API.
> >
> > Signed-off-by: Pali Rohár <pali@kernel.org>
>
> Does this really allow setting FS_ENCRYPT_FL via FS_IOC_FSSETXATTR, and how does
> this interact with the existing fscrypt support in ext4, f2fs, ubifs, and ceph
> which use that flag? In the fscrypt case it's very intentional that
> FS_ENCRYPT_FL can be gotten via FS_IOC_GETFLAGS but not set via FS_IOC_SETFLAGS.
> A simple toggle of the flag can't work, as it doesn't provide the needed
> information. Instead there is a separate ioctl (FS_IOC_SET_ENCRYPTION_POLICY)
> for enabling encryption which takes additional parameters and only works on
> empty directories.
>
> - Eric
This encrypt flag I have not implemented in the last cifs patch.
For SMB it needs to use additional SMB IOCTL which is not supported yet.
So I have not looked at that deeply yet.
I tested only that setting and clearing compression bit is working over
cifs SMB client, via that additional SMB IOCTL.
next prev parent reply other threads:[~2025-02-16 18:49 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-02-16 16:40 [RFC PATCH 0/4] fs: Add support for Windows file attributes Pali Rohár
2025-02-16 16:40 ` [RFC PATCH 1/4] fs: Add FS_XFLAG_COMPRESSED & FS_XFLAG_ENCRYPTED for FS_IOC_FS[GS]ETXATTR API Pali Rohár
2025-02-16 18:34 ` Eric Biggers
2025-02-16 18:49 ` Pali Rohár [this message]
2025-02-16 20:17 ` Amir Goldstein
2025-02-16 20:24 ` Pali Rohár
2025-02-16 20:43 ` Amir Goldstein
2025-02-16 21:17 ` Pali Rohár
2025-02-17 8:27 ` Amir Goldstein
2025-02-18 1:33 ` Dave Chinner
2025-02-18 9:13 ` Amir Goldstein
2025-02-18 19:27 ` Pali Rohár
2025-02-18 22:56 ` Dave Chinner
2025-02-18 23:06 ` Pali Rohár
2025-02-19 7:55 ` Amir Goldstein
2025-02-21 16:34 ` Theodore Ts'o
2025-02-21 17:11 ` Amir Goldstein
2025-02-25 5:41 ` Dave Chinner
2025-02-25 20:14 ` Pali Rohár
2025-02-21 18:55 ` Andreas Dilger
2025-02-25 3:42 ` Dave Chinner
2025-02-18 22:45 ` Dave Chinner
2025-02-16 16:40 ` [RFC PATCH 2/4] fs: Extend FS_IOC_FS[GS]ETXATTR API for Windows attributes Pali Rohár
2025-02-16 19:55 ` Amir Goldstein
2025-02-16 20:01 ` Pali Rohár
2025-02-16 20:34 ` Amir Goldstein
2025-02-16 21:01 ` Pali Rohár
2025-02-16 16:40 ` [RFC PATCH 3/4] fs: Implement support for fsx_xflags_mask, fsx_xflags2 and fsx_xflags2_mask into vfs Pali Rohár
2025-02-21 18:24 ` Theodore Ts'o
2025-02-25 20:07 ` Pali Rohár
2025-02-16 16:40 ` [RFC PATCH 4/4] cifs: Implement FS_IOC_FS[GS]ETXATTR API for Windows attributes Pali Rohár
2025-02-16 20:21 ` Amir Goldstein
2025-02-16 20:25 ` Pali Rohár
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