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Message-Id: <20230724060336.8939-1-nj.shetty@samsung.com>
Date: Mon, 24 Jul 2023 11:33:36 +0530
From: Nitesh Shetty <nj.shetty@...sung.com>
To: Alexander Viro <viro@...iv.linux.org.uk>,
Christian Brauner <brauner@...nel.org>
Cc: hch@....de, gost.dev@...sung.com,
Anuj Gupta <anuj20.g@...sung.com>,
Nitesh Shetty <nj.shetty@...sung.com>,
linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] fs/read_write: Enable copy_file_range for block device.
From: Anuj Gupta <anuj20.g@...sung.com>
Change generic_copy_file_checks to use ->f_mapping->host for both inode_in
and inode_out. Allow block device in generic_file_rw_checks.
Signed-off-by: Anuj Gupta <anuj20.g@...sung.com>
Signed-off-by: Nitesh Shetty <nj.shetty@...sung.com>
---
fs/read_write.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/fs/read_write.c b/fs/read_write.c
index b07de77ef126..eaeb481477f4 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -1405,8 +1405,8 @@ static int generic_copy_file_checks(struct file *file_in, loff_t pos_in,
struct file *file_out, loff_t pos_out,
size_t *req_count, unsigned int flags)
{
- struct inode *inode_in = file_inode(file_in);
- struct inode *inode_out = file_inode(file_out);
+ struct inode *inode_in = file_in->f_mapping->host;
+ struct inode *inode_out = file_out->f_mapping->host;
uint64_t count = *req_count;
loff_t size_in;
int ret;
@@ -1708,7 +1708,9 @@ int generic_file_rw_checks(struct file *file_in, struct file *file_out)
/* Don't copy dirs, pipes, sockets... */
if (S_ISDIR(inode_in->i_mode) || S_ISDIR(inode_out->i_mode))
return -EISDIR;
- if (!S_ISREG(inode_in->i_mode) || !S_ISREG(inode_out->i_mode))
+ if (!S_ISREG(inode_in->i_mode) && !S_ISBLK(inode_in->i_mode))
+ return -EINVAL;
+ if ((inode_in->i_mode & S_IFMT) != (inode_out->i_mode & S_IFMT))
return -EINVAL;
if (!(file_in->f_mode & FMODE_READ) ||
--
2.25.1
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