From: Jon Hunter <jonathanh@nvidia.com>
To: Christoph Hellwig <hch@lst.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>,
Linus Torvalds <torvalds@linux-foundation.org>,
Stephen Rothwell <sfr@canb.auug.org.au>,
Luis Chamberlain <mcgrof@kernel.org>,
Matthew Wilcox <willy@infradead.org>,
Kees Cook <keescook@chromium.org>,
Iurii Zaikin <yzaikin@google.com>, <linux-kernel@vger.kernel.org>,
<linux-fsdevel@vger.kernel.org>,
linux-tegra <linux-tegra@vger.kernel.org>
Subject: Re: [PATCH 15/23] seq_file: switch over direct seq_read method calls to seq_read_iter
Date: Sat, 11 Jul 2020 12:47:04 +0100 [thread overview]
Message-ID: <b838bf55-bd1e-7ff8-fcf5-fe372944dc9f@nvidia.com> (raw)
In-Reply-To: <20200711064857.GA29078@lst.de>
On 11/07/2020 07:48, Christoph Hellwig wrote:
> Please try this one:
>
> ---
> From 5e86146296fbcd7593da1d9d39b9685a5e6b83be Mon Sep 17 00:00:00 2001
> From: Christoph Hellwig <hch@lst.de>
> Date: Sat, 11 Jul 2020 08:46:10 +0200
> Subject: debugfs: add a proxy stub for ->read_iter
>
> debugfs registrations typically go through a set of proxy ops to deal
> with refcounting, which need to support every method that can be
> supported. Add ->read_iter to the proxy ops to prepare for seq_file to
> be switch to ->read_iter.
>
> Reported-by: Jon Hunter <jonathanh@nvidia.com>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
> fs/debugfs/file.c | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/fs/debugfs/file.c b/fs/debugfs/file.c
> index 8ba32c2feb1b73..dcd7bdaf67417f 100644
> --- a/fs/debugfs/file.c
> +++ b/fs/debugfs/file.c
> @@ -231,6 +231,10 @@ FULL_PROXY_FUNC(read, ssize_t, filp,
> loff_t *ppos),
> ARGS(filp, buf, size, ppos));
>
> +FULL_PROXY_FUNC(read_iter, ssize_t, iocb->ki_filp,
> + PROTO(struct kiocb *iocb, struct iov_iter *iter),
> + ARGS(iocb, iter));
> +
> FULL_PROXY_FUNC(write, ssize_t, filp,
> PROTO(struct file *filp, const char __user *buf, size_t size,
> loff_t *ppos),
> @@ -286,6 +290,8 @@ static void __full_proxy_fops_init(struct file_operations *proxy_fops,
> proxy_fops->llseek = full_proxy_llseek;
> if (real_fops->read)
> proxy_fops->read = full_proxy_read;
> + if (real_fops->read_iter)
> + proxy_fops->read_iter = full_proxy_read_iter;
> if (real_fops->write)
> proxy_fops->write = full_proxy_write;
> if (real_fops->poll)
>
Thanks! Works for me.
Tested-by: Jon Hunter <jonathanh@nvidia.com>
Cheers
Jon
--
nvpublic
next prev parent reply other threads:[~2020-07-11 11:47 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-07 17:47 stop using ->read and ->write for kernel access v3 Christoph Hellwig
2020-07-07 17:47 ` [PATCH 01/23] cachefiles: switch to kernel_write Christoph Hellwig
2020-07-07 17:47 ` [PATCH 02/23] autofs: " Christoph Hellwig
2020-07-07 17:47 ` [PATCH 03/23] bpfilter: " Christoph Hellwig
2020-07-07 17:47 ` [PATCH 04/23] fs: unexport __kernel_write Christoph Hellwig
2020-07-07 17:47 ` [PATCH 05/23] fs: check FMODE_WRITE in __kernel_write Christoph Hellwig
2020-07-07 17:47 ` [PATCH 06/23] fs: implement kernel_write using __kernel_write Christoph Hellwig
2020-07-07 17:47 ` [PATCH 07/23] fs: remove __vfs_write Christoph Hellwig
2020-07-07 17:47 ` [PATCH 08/23] fs: don't change the address limit for ->write_iter in __kernel_write Christoph Hellwig
2020-07-29 20:50 ` Al Viro
2020-07-30 7:02 ` Christoph Hellwig
2020-07-07 17:47 ` [PATCH 09/23] fs: add a __kernel_read helper Christoph Hellwig
2020-07-07 17:47 ` [PATCH 10/23] integrity/ima: switch to using __kernel_read Christoph Hellwig
2020-07-07 17:47 ` [PATCH 11/23] fs: implement kernel_read " Christoph Hellwig
2020-07-07 17:47 ` [PATCH 12/23] fs: remove __vfs_read Christoph Hellwig
2020-07-07 17:47 ` [PATCH 13/23] fs: don't change the address limit for ->read_iter in __kernel_read Christoph Hellwig
2020-07-07 17:47 ` [PATCH 14/23] seq_file: add seq_read_iter Christoph Hellwig
2020-07-07 17:47 ` [PATCH 16/23] proc: remove a level of indentation in proc_get_inode Christoph Hellwig
2020-07-07 17:47 ` [PATCH 17/23] proc: cleanup the compat vs no compat file ops Christoph Hellwig
2020-07-07 17:47 ` [PATCH 18/23] proc: add a read_iter method to proc proc_ops Christoph Hellwig
2020-07-07 17:47 ` [PATCH 19/23] proc: switch over direct seq_read method calls to seq_read_iter Christoph Hellwig
2020-07-07 17:47 ` [PATCH 20/23] sysctl: Convert to iter interfaces Christoph Hellwig
2020-07-07 17:47 ` [PATCH 21/23] fs: don't allow kernel reads and writes without iter ops Christoph Hellwig
2020-07-07 17:48 ` [PATCH 22/23] fs: default to generic_file_splice_read for files having ->read_iter Christoph Hellwig
2020-07-30 0:05 ` Al Viro
2020-07-30 7:03 ` Christoph Hellwig
2020-07-30 15:08 ` Al Viro
2020-07-30 15:20 ` Christoph Hellwig
2020-07-30 16:17 ` Al Viro
2020-07-30 16:22 ` Al Viro
2020-07-30 16:31 ` Christoph Hellwig
2020-07-07 17:48 ` [PATCH 23/23] fs: don't allow splice read/write without explicit ops Christoph Hellwig
2020-07-07 20:24 ` stop using ->read and ->write for kernel access v3 Linus Torvalds
2020-07-08 6:07 ` Christoph Hellwig
2020-07-07 23:03 ` Stephen Rothwell
[not found] ` <20200707174801.4162712-16-hch@lst.de>
2020-07-10 12:55 ` [PATCH 15/23] seq_file: switch over direct seq_read method calls to seq_read_iter Jon Hunter
2020-07-10 12:58 ` Christoph Hellwig
2020-07-11 6:48 ` Christoph Hellwig
2020-07-11 11:47 ` Jon Hunter [this message]
2020-07-17 21:09 ` Thomas Gleixner
2020-07-20 9:33 ` Christoph Hellwig
2020-07-29 20:59 ` Al Viro
2020-07-30 7:10 ` Thomas Gleixner
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