* [PATCH V2 2/2] block_dev: Add size check before doing async write on block device.
@ 2013-09-17 3:22 majianpeng
0 siblings, 0 replies; only message in thread
From: majianpeng @ 2013-09-17 3:22 UTC (permalink / raw)
To: axboe, viro; +Cc: LKML, linux-fsdevel
For async-write on block device,when disk removed,the vfs don't know.
It will continue do async-write.Add this check it will stop async-write
when disk removed.
Signed-off-by: Jianpeng Ma <majianpeng@gmail.com>
---
fs/block_dev.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/fs/block_dev.c b/fs/block_dev.c
index 1173a4e..e308b52 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -1514,6 +1514,10 @@ ssize_t blkdev_aio_write(struct kiocb *iocb, const struct iovec *iov,
struct file *file = iocb->ki_filp;
struct blk_plug plug;
ssize_t ret;
+ loff_t size = i_size_read(file->f_mapping->host);
+
+ if (pos >= size)
+ return 0;
BUG_ON(iocb->ki_pos != pos);
--
1.8.4-rc0
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