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Merge branch 'work.read_write' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

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Pull nowait read support from Al Viro:
 "Support IOCB_NOWAIT for buffered reads and block devices"

* 'work.read_write' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  block_dev: support RFW_NOWAIT on block device nodes
  fs: support RWF_NOWAIT for buffered reads
  fs: support IOCB_NOWAIT in generic_file_buffered_read
  fs: pass iocb to do_generic_file_read
This commit is contained in:
Linus Torvalds
2017-09-14 19:29:55 -07:00
parent 0f0d12728e c35fc7a5ab
commit e253d98f5b
7 changed files with 42 additions and 22 deletions
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6
fs/btrfs/file.c
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@@ -1886,6 +1886,10 @@ static ssize_t btrfs_file_write_iter(struct kiocb *iocb,
loff_t oldsize;
int clean_page = 0;
if (!(iocb->ki_flags & IOCB_DIRECT) &&
(iocb->ki_flags & IOCB_NOWAIT))
return -EOPNOTSUPP;
if (!inode_trylock(inode)) {
if (iocb->ki_flags & IOCB_NOWAIT)
return -EAGAIN;
@@ -3112,7 +3116,7 @@ out:
static int btrfs_file_open(struct inode *inode, struct file *filp)
{
filp->f_mode |= FMODE_AIO_NOWAIT;
filp->f_mode |= FMODE_NOWAIT;
return generic_file_open(inode, filp);
}