From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Olga Kornievskaia <kolga@netapp.com>,
Trond Myklebust <trond.myklebust@hammerspace.com>,
Sasha Levin <sashal@kernel.org>,
linux-nfs@vger.kernel.org
Subject: [PATCH AUTOSEL 5.0 73/79] NFSv4.1 fix incorrect return value in copy_file_range
Date: Fri, 26 Apr 2019 21:38:32 -0400 [thread overview]
Message-ID: <20190427013838.6596-73-sashal@kernel.org> (raw)
In-Reply-To: <20190427013838.6596-1-sashal@kernel.org>
From: Olga Kornievskaia <kolga@netapp.com>
[ Upstream commit 0769663b4f580566ef6cdf366f3073dbe8022c39 ]
According to the NFSv4.2 spec if the input and output file is the
same file, operation should fail with EINVAL. However, linux
copy_file_range() system call has no such restrictions. Therefore,
in such case let's return EOPNOTSUPP and allow VFS to fallback
to doing do_splice_direct(). Also when copy_file_range is called
on an NFSv4.0 or 4.1 mount (ie., a server that doesn't support
COPY functionality), we also need to return EOPNOTSUPP and
fallback to a regular copy.
Fixes xfstest generic/075, generic/091, generic/112, generic/263
for all NFSv4.x versions.
Signed-off-by: Olga Kornievskaia <kolga@netapp.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
fs/nfs/nfs42proc.c | 3 ---
fs/nfs/nfs4file.c | 4 +++-
2 files changed, 3 insertions(+), 4 deletions(-)
diff --git a/fs/nfs/nfs42proc.c b/fs/nfs/nfs42proc.c
index fed06fd9998d..94f98e190e63 100644
--- a/fs/nfs/nfs42proc.c
+++ b/fs/nfs/nfs42proc.c
@@ -329,9 +329,6 @@ ssize_t nfs42_proc_copy(struct file *src, loff_t pos_src,
};
ssize_t err, err2;
- if (!nfs_server_capable(file_inode(dst), NFS_CAP_COPY))
- return -EOPNOTSUPP;
-
src_lock = nfs_get_lock_context(nfs_file_open_context(src));
if (IS_ERR(src_lock))
return PTR_ERR(src_lock);
diff --git a/fs/nfs/nfs4file.c b/fs/nfs/nfs4file.c
index 45b2322e092d..00d17198ee12 100644
--- a/fs/nfs/nfs4file.c
+++ b/fs/nfs/nfs4file.c
@@ -133,8 +133,10 @@ static ssize_t nfs4_copy_file_range(struct file *file_in, loff_t pos_in,
struct file *file_out, loff_t pos_out,
size_t count, unsigned int flags)
{
+ if (!nfs_server_capable(file_inode(file_out), NFS_CAP_COPY))
+ return -EOPNOTSUPP;
if (file_inode(file_in) == file_inode(file_out))
- return -EINVAL;
+ return -EOPNOTSUPP;
return nfs42_proc_copy(file_in, pos_in, file_out, pos_out, count);
}
--
2.19.1
prev parent reply other threads:[~2019-04-27 1:52 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20190427013838.6596-1-sashal@kernel.org>
2019-04-27 1:38 ` [PATCH AUTOSEL 5.0 72/79] NFS: Forbid setting AF_INET6 to "struct sockaddr_in"->sin_family Sasha Levin
2019-04-27 1:38 ` Sasha Levin [this message]
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