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authorLinus Torvalds <torvalds@linux-foundation.org>2014-06-12 10:30:18 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-06-12 10:30:18 -0700
commit16b9057804c02e2d351e9c8f606e909b43cbd9e7 (patch)
treea3ac6e1d9d57a8abf4267e5ead3f2de1309335eb /fs/block_dev.c
parent5c02c392cd2320e8d612376d6b72b6548a680923 (diff)
parentc2338f2dc7c1e9f6202f370c64ffd7f44f3d4b51 (diff)
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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs updates from Al Viro: "This the bunch that sat in -next + lock_parent() fix. This is the minimal set; there's more pending stuff. In particular, I really hope to get acct.c fixes merged this cycle - we need that to deal sanely with delayed-mntput stuff. In the next pile, hopefully - that series is fairly short and localized (kernel/acct.c, fs/super.c and fs/namespace.c). In this pile: more iov_iter work. Most of prereqs for ->splice_write with sane locking order are there and Kent's dio rewrite would also fit nicely on top of this pile" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (70 commits) lock_parent: don't step on stale ->d_parent of all-but-freed one kill generic_file_splice_write() ceph: switch to iter_file_splice_write() shmem: switch to iter_file_splice_write() nfs: switch to iter_splice_write_file() fs/splice.c: remove unneeded exports ocfs2: switch to iter_file_splice_write() ->splice_write() via ->write_iter() bio_vec-backed iov_iter optimize copy_page_{to,from}_iter() bury generic_file_aio_{read,write} lustre: get rid of messing with iovecs ceph: switch to ->write_iter() ceph_sync_direct_write: stop poking into iov_iter guts ceph_sync_read: stop poking into iov_iter guts new helper: copy_page_from_iter() fuse: switch to ->write_iter() btrfs: switch to ->write_iter() ocfs2: switch to ->write_iter() xfs: switch to ->write_iter() ...
Diffstat (limited to 'fs/block_dev.c')
-rw-r--r--fs/block_dev.c40
1 files changed, 18 insertions, 22 deletions
diff --git a/fs/block_dev.c b/fs/block_dev.c
index 83fba15..6d72746 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -165,14 +165,15 @@ blkdev_get_block(struct inode *inode, sector_t iblock,
}
static ssize_t
-blkdev_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov,
- loff_t offset, unsigned long nr_segs)
+blkdev_direct_IO(int rw, struct kiocb *iocb, struct iov_iter *iter,
+ loff_t offset)
{
struct file *file = iocb->ki_filp;
struct inode *inode = file->f_mapping->host;
- return __blockdev_direct_IO(rw, iocb, inode, I_BDEV(inode), iov, offset,
- nr_segs, blkdev_get_block, NULL, NULL, 0);
+ return __blockdev_direct_IO(rw, iocb, inode, I_BDEV(inode), iter,
+ offset, blkdev_get_block,
+ NULL, NULL, 0);
}
int __sync_blockdev(struct block_device *bdev, int wait)
@@ -1571,43 +1572,38 @@ static long block_ioctl(struct file *file, unsigned cmd, unsigned long arg)
* Does not take i_mutex for the write and thus is not for general purpose
* use.
*/
-ssize_t blkdev_aio_write(struct kiocb *iocb, const struct iovec *iov,
- unsigned long nr_segs, loff_t pos)
+ssize_t blkdev_write_iter(struct kiocb *iocb, struct iov_iter *from)
{
struct file *file = iocb->ki_filp;
struct blk_plug plug;
ssize_t ret;
- BUG_ON(iocb->ki_pos != pos);
-
blk_start_plug(&plug);
- ret = __generic_file_aio_write(iocb, iov, nr_segs);
+ ret = __generic_file_write_iter(iocb, from);
if (ret > 0) {
ssize_t err;
-
- err = generic_write_sync(file, pos, ret);
+ err = generic_write_sync(file, iocb->ki_pos - ret, ret);
if (err < 0)
ret = err;
}
blk_finish_plug(&plug);
return ret;
}
-EXPORT_SYMBOL_GPL(blkdev_aio_write);
+EXPORT_SYMBOL_GPL(blkdev_write_iter);
-static ssize_t blkdev_aio_read(struct kiocb *iocb, const struct iovec *iov,
- unsigned long nr_segs, loff_t pos)
+static ssize_t blkdev_read_iter(struct kiocb *iocb, struct iov_iter *to)
{
struct file *file = iocb->ki_filp;
struct inode *bd_inode = file->f_mapping->host;
loff_t size = i_size_read(bd_inode);
+ loff_t pos = iocb->ki_pos;
if (pos >= size)
return 0;
size -= pos;
- if (size < iocb->ki_nbytes)
- nr_segs = iov_shorten((struct iovec *)iov, nr_segs, size);
- return generic_file_aio_read(iocb, iov, nr_segs, pos);
+ iov_iter_truncate(to, size);
+ return generic_file_read_iter(iocb, to);
}
/*
@@ -1639,10 +1635,10 @@ const struct file_operations def_blk_fops = {
.open = blkdev_open,
.release = blkdev_close,
.llseek = block_llseek,
- .read = do_sync_read,
- .write = do_sync_write,
- .aio_read = blkdev_aio_read,
- .aio_write = blkdev_aio_write,
+ .read = new_sync_read,
+ .write = new_sync_write,
+ .read_iter = blkdev_read_iter,
+ .write_iter = blkdev_write_iter,
.mmap = generic_file_mmap,
.fsync = blkdev_fsync,
.unlocked_ioctl = block_ioctl,
@@ -1650,7 +1646,7 @@ const struct file_operations def_blk_fops = {
.compat_ioctl = compat_blkdev_ioctl,
#endif
.splice_read = generic_file_splice_read,
- .splice_write = generic_file_splice_write,
+ .splice_write = iter_file_splice_write,
};
int ioctl_by_bdev(struct block_device *bdev, unsigned cmd, unsigned long arg)
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