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splice: lift checks from do_splice_from() into callers 

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2013-06-19 15:41:54 +04:00
parent 68d70d03f8
commit 18c67cb9f0
1 changed files with 20 additions and 11 deletions
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31
fs/splice.c
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@ -1098,17 +1098,6 @@ static long do_splice_from(struct pipe_inode_info *pipe, struct file *out,
{
ssize_t (*splice_write)(struct pipe_inode_info *, struct file *,
loff_t *, size_t, unsigned int);
int ret;
if (unlikely(!(out->f_mode & FMODE_WRITE)))
return -EBADF;
if (unlikely(out->f_flags & O_APPEND))
return -EINVAL;
ret = rw_verify_area(WRITE, out, ppos, len);
if (unlikely(ret < 0))
return ret;
if (out->f_op && out->f_op->splice_write)
splice_write = out->f_op->splice_write;
@ -1303,6 +1292,16 @@ long do_splice_direct(struct file *in, loff_t *ppos, struct file *out,
};
long ret;
if (unlikely(!(out->f_mode & FMODE_WRITE)))
return -EBADF;
if (unlikely(out->f_flags & O_APPEND))
return -EINVAL;
ret = rw_verify_area(WRITE, out, opos, len);
if (unlikely(ret < 0))
return ret;
ret = splice_direct_to_actor(in, &sd, direct_splice_actor);
if (ret > 0)
*ppos = sd.pos;
@ -1358,6 +1357,16 @@ static long do_splice(struct file *in, loff_t __user *off_in,
offset = out->f_pos;
}
if (unlikely(!(out->f_mode & FMODE_WRITE)))
return -EBADF;
if (unlikely(out->f_flags & O_APPEND))
return -EINVAL;
ret = rw_verify_area(WRITE, out, &offset, len);
if (unlikely(ret < 0))
return ret;
file_start_write(out);
ret = do_splice_from(ipipe, out, &offset, len, flags);
file_end_write(out);