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authorAl Viro <viro@zeniv.linux.org.uk>2014-02-12 03:37:41 +0400
committerAl Viro <viro@zeniv.linux.org.uk>2014-05-07 01:36:00 +0400
commit293bc9822fa9b3c9d4b7893bcb241e085580771a (patch)
tree89aae8e9d832199906d413dcffd5b885bcee14fe /fs/open.c
parent7f7f25e82d54870df24d415a7007fbd327da027b (diff)
downloadlinux-293bc9822fa9b3c9d4b7893bcb241e085580771a.tar.xz
new methods: ->read_iter() and ->write_iter()
Beginning to introduce those. Just the callers for now, and it's clumsier than it'll eventually become; once we finish converting aio_read and aio_write instances, the things will get nicer. For now, these guys are in parallel to ->aio_read() and ->aio_write(); they take iocb and iov_iter, with everything in iov_iter already validated. File offset is passed in iocb->ki_pos, iov/nr_segs - in iov_iter. Main concerns in that series are stack footprint and ability to split the damn thing cleanly. [fix from Peter Ujfalusi <peter.ujfalusi@ti.com> folded] Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/open.c')
-rw-r--r--fs/open.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/fs/open.c b/fs/open.c
index 39d3d0468ee6..36662d036237 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -725,9 +725,11 @@ static int do_dentry_open(struct file *f,
}
if ((f->f_mode & (FMODE_READ | FMODE_WRITE)) == FMODE_READ)
i_readcount_inc(inode);
- if ((f->f_mode & FMODE_READ) && likely(f->f_op->read || f->f_op->aio_read))
+ if ((f->f_mode & FMODE_READ) &&
+ likely(f->f_op->read || f->f_op->aio_read || f->f_op->read_iter))
f->f_mode |= FMODE_CAN_READ;
- if ((f->f_mode & FMODE_WRITE) && likely(f->f_op->write || f->f_op->aio_write))
+ if ((f->f_mode & FMODE_WRITE) &&
+ likely(f->f_op->write || f->f_op->aio_write || f->f_op->write_iter))
f->f_mode |= FMODE_CAN_WRITE;
f->f_flags &= ~(O_CREAT | O_EXCL | O_NOCTTY | O_TRUNC);