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AJvYcCUGWvdNadFXHzHZ3DdYddIYKqKN7okDFTFvi0mMsLSdSgMnRL2AyXE57Ej8vKZCkA7C92J/2CY7C75O2RCtAvWx0Q9mFl+1tWUGpAzQ X-Gm-Message-State: AOJu0YzBKQ5ukd7OEpJ6gzmmMo9Fn+gQyeQ0/S+jfx+xOKosLhcnNQX1 4DX9mc/q12i1rMwnKPaVS+6LxAhrtGS9fWCdSQz00k6WFTGhInN9ZP34twRiU4o= X-Google-Smtp-Source: AGHT+IG0Q+2GTIz4xzJKQZb4/LaRz7TK4ronqVobmO/AKkEHPaGT79eQEbnXx4hY8yxj2ScSHCLFlA== X-Received: by 2002:a05:6359:2ea3:b0:186:10ee:b04 with SMTP id rp35-20020a0563592ea300b0018610ee0b04mr431149rwb.1.1712682640194; Tue, 09 Apr 2024 10:10:40 -0700 (PDT) Received: from [192.168.1.150] ([198.8.77.194]) by smtp.gmail.com with ESMTPSA id w9-20020a63fb49000000b005bd980cca56sm8397770pgj.29.2024.04.09.10.10.39 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 09 Apr 2024 10:10:39 -0700 (PDT) Message-ID: <8187c490-b1e1-4c7d-9f7c-590ade4777c4@kernel.dk> Date: Tue, 9 Apr 2024 11:10:38 -0600 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 1/4] iov_iter: add copy_to_iter_full() Content-Language: en-US To: Al Viro Cc: linux-fsdevel@vger.kernel.org, brauner@kernel.org, linux-kernel@vger.kernel.org References: <20240409152438.77960-1-axboe@kernel.dk> <20240409152438.77960-2-axboe@kernel.dk> <20240409170644.GE2118490@ZenIV> From: Jens Axboe In-Reply-To: <20240409170644.GE2118490@ZenIV> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 4/9/24 11:06 AM, Al Viro wrote: > On Tue, Apr 09, 2024 at 09:22:15AM -0600, Jens Axboe wrote: >> Add variant of copy_to_iter() that either copies the full amount asked >> for and return success, or ensures that the iov_iter is back to where >> it started on failure and returns false. > > FWIW, see git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git #work.iov_iter > > There was an open-coded instance (skb_copy_linear()) that I'd converted to > that helper in the same commit; I can split it, of course, but I don't > see much point in that. No reason to split it, I'll have a dependency regardless. I'll just pull your branch in, so ignore patch 1 here, 2-4 will remain the same. -- Jens Axboe