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Diffstat (limited to 'fs/block_dev.c')
-rw-r--r--fs/block_dev.c37
1 files changed, 12 insertions, 25 deletions
diff --git a/fs/block_dev.c b/fs/block_dev.c
index 256233098206..1e86823a9cbd 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -58,17 +58,24 @@ static void bdev_inode_switch_bdi(struct inode *inode,
struct backing_dev_info *dst)
{
struct backing_dev_info *old = inode->i_data.backing_dev_info;
+ bool wakeup_bdi = false;
if (unlikely(dst == old)) /* deadlock avoidance */
return;
bdi_lock_two(&old->wb, &dst->wb);
spin_lock(&inode->i_lock);
inode->i_data.backing_dev_info = dst;
- if (inode->i_state & I_DIRTY)
+ if (inode->i_state & I_DIRTY) {
+ if (bdi_cap_writeback_dirty(dst) && !wb_has_dirty_io(&dst->wb))
+ wakeup_bdi = true;
list_move(&inode->i_wb_list, &dst->wb.b_dirty);
+ }
spin_unlock(&inode->i_lock);
spin_unlock(&old->wb.list_lock);
spin_unlock(&dst->wb.list_lock);
+
+ if (wakeup_bdi)
+ bdi_wakeup_thread_delayed(dst);
}
/* Kill _all_ buffers and pagecache , dirty or not.. */
@@ -325,31 +332,10 @@ static int blkdev_write_end(struct file *file, struct address_space *mapping,
static loff_t block_llseek(struct file *file, loff_t offset, int whence)
{
struct inode *bd_inode = file->f_mapping->host;
- loff_t size;
loff_t retval;
mutex_lock(&bd_inode->i_mutex);
- size = i_size_read(bd_inode);
-
- retval = -EINVAL;
- switch (whence) {
- case SEEK_END:
- offset += size;
- break;
- case SEEK_CUR:
- offset += file->f_pos;
- case SEEK_SET:
- break;
- default:
- goto out;
- }
- if (offset >= 0 && offset <= size) {
- if (offset != file->f_pos) {
- file->f_pos = offset;
- }
- retval = offset;
- }
-out:
+ retval = fixed_size_llseek(file, offset, whence, i_size_read(bd_inode));
mutex_unlock(&bd_inode->i_mutex);
return retval;
}
@@ -1533,7 +1519,7 @@ ssize_t blkdev_aio_write(struct kiocb *iocb, const struct iovec *iov,
blk_start_plug(&plug);
ret = __generic_file_aio_write(iocb, iov, nr_segs, &iocb->ki_pos);
- if (ret > 0 || ret == -EIOCBQUEUED) {
+ if (ret > 0) {
ssize_t err;
err = generic_write_sync(file, pos, ret);
@@ -1556,7 +1542,7 @@ static ssize_t blkdev_aio_read(struct kiocb *iocb, const struct iovec *iov,
return 0;
size -= pos;
- if (size < iocb->ki_left)
+ 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);
}
@@ -1583,6 +1569,7 @@ static const struct address_space_operations def_blk_aops = {
.writepages = generic_writepages,
.releasepage = blkdev_releasepage,
.direct_IO = blkdev_direct_IO,
+ .is_dirty_writeback = buffer_check_dirty_writeback,
};
const struct file_operations def_blk_fops = {