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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>
master
Changli Gao 12 years ago committed by Jens Axboe
parent
commit
19c9a49b43
  1. 6
      fs/splice.c

6
fs/splice.c

@ -1372,8 +1372,7 @@ static long do_splice(struct file *in, loff_t __user *off_in, @@ -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, @@ -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;

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