Kernel/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2025-01-07 13:43:51 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

block_dev: support RFW_NOWAIT on block device nodes

Browse Source 
All support is already there in the generic code, we just need to wire
it up.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Christoph Hellwig 2017-08-29 16:13:21 +02:00 committed by Al Viro
parent 91f9943e1c
commit c35fc7a5ab
1 changed files with 5 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
fs/block_dev.c
View File

@ -1739,6 +1739,8 @@ static int blkdev_open(struct inode * inode, struct file * filp)
*/ */
filp->f_flags |= O_LARGEFILE; filp->f_flags |= O_LARGEFILE;
filp->f_mode |= FMODE_NOWAIT;
if (filp->f_flags & O_NDELAY) if (filp->f_flags & O_NDELAY)
filp->f_mode |= FMODE_NDELAY; filp->f_mode |= FMODE_NDELAY;
if (filp->f_flags & O_EXCL) if (filp->f_flags & O_EXCL)
@ -1891,6 +1893,9 @@ ssize_t blkdev_write_iter(struct kiocb *iocb, struct iov_iter *from)
if (iocb->ki_pos >= size) if (iocb->ki_pos >= size)
return -ENOSPC; return -ENOSPC;
if ((iocb->ki_flags & (IOCB_NOWAIT | IOCB_DIRECT)) == IOCB_NOWAIT)
return -EOPNOTSUPP;
iov_iter_truncate(from, size - iocb->ki_pos); iov_iter_truncate(from, size - iocb->ki_pos);
blk_start_plug(&plug); blk_start_plug(&plug);