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splice: check f_mode for seekable file 

check f_mode for seekable file

As a seekable file is allowed without a llseek function, so the old way isn't
work any more.

Signed-off-by: Changli Gao <xiaosuo@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
----
 fs/splice.c |    6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
This commit is contained in:
Changli Gao 2010-06-29 13:10:36 +02:00 committed by Jens Axboe
parent 2cb4b05e76
commit 19c9a49b43
1 changed files with 2 additions and 4 deletions
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6
fs/splice.c
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@ -1372,8 +1372,7 @@ static long do_splice(struct file *in, loff_t __user *off_in,
if (off_in)
return -ESPIPE;
if (off_out) {
if (!out->f_op || !out->f_op->llseek ||
out->f_op->llseek == no_llseek)
if (!(out->f_mode & FMODE_PWRITE))
return -EINVAL;
if (copy_from_user(&offset, off_out, sizeof(loff_t)))
return -EFAULT;
@ -1393,8 +1392,7 @@ static long do_splice(struct file *in, loff_t __user *off_in,
if (off_out)
return -ESPIPE;
if (off_in) {
if (!in->f_op || !in->f_op->llseek ||
in->f_op->llseek == no_llseek)
if (!(in->f_mode & FMODE_PREAD))
return -EINVAL;
if (copy_from_user(&offset, off_in, sizeof(loff_t)))
return -EFAULT;