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Date: Wed, 2 Sep 2026 16:05:20 +0200
From: Christoph Hellwig <hch@lst.de>
To: Kanchan Joshi <joshi.k@samsung.com>
Cc: Christoph Hellwig <hch@lst.de>, "Darrick J. Wong" <djwong@kernel.org>,
	brauner@kernel.org, dgc@kernel.org, jack@suse.cz, cem@kernel.org,
	axboe@kernel.dk, kbusch@kernel.org, ritesh.list@gmail.com,
	linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org,
	linux-block@vger.kernel.org, gost.dev@samsung.com,
	Anuj Gupta <anuj20.g@samsung.com>
Subject: Re: [PATCH v4 1/6] fs: add write-stream management ioctls
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References: <20260717125538.508925-1-joshi.k@samsung.com> <CGME20260717125627epcas5p3f5ad1cf917d563cc061e571b2f932319@epcas5p3.samsung.com> <20260717125538.508925-2-joshi.k@samsung.com> <20260721030338.GU7380@frogsfrogsfrogs> <71ae458a-a6e3-4c6f-8fb9-7e8bc088bb87@samsung.com> <20260819070814.GB1541@lst.de> <076db8e7-6c6e-4d91-b442-1471ad7a5c27@samsung.com> <20260825065533.GA24808@lst.de> <c6064b06-9e34-4790-80ef-c76333c2a11a@samsung.com>
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On Wed, Aug 26, 2026 at 04:12:52PM +0530, Kanchan Joshi wrote:
> So based on the above discussion, do you see this as the right interface?
> 
> 1. FS_IOC_WRITE_STREAM_GET_MAX : query max write streams
> 2. FS_IOC_WRITE_STREAM_ALLOC: allocate any write stream (if available) 
> and return stream fd. No flag whatsoever.
> 3. FS_IOC_WRITE_STREAM_SET: set write stream into a file using stream-fd

Yes.