NFS: track direct IO left bytes
Signed-off-by: Peng Tao <tao.peng@emc.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c
index 253d397..4be8673 100644
--- a/fs/nfs/direct.c
+++ b/fs/nfs/direct.c
@@ -78,6 +78,7 @@
atomic_t io_count; /* i/os we're waiting for */
spinlock_t lock; /* protect completion state */
ssize_t count, /* bytes actually processed */
+ bytes_left, /* bytes left to be sent */
error; /* any reported error */
struct completion completion; /* wait for i/o completion */
@@ -390,6 +391,7 @@
user_addr += req_len;
pos += req_len;
count -= req_len;
+ dreq->bytes_left -= req_len;
}
/* The nfs_page now hold references to these pages */
nfs_direct_release_pages(pagevec, npages);
@@ -457,6 +459,7 @@
goto out;
dreq->inode = inode;
+ dreq->bytes_left = iov_length(iov, nr_segs);
dreq->ctx = get_nfs_open_context(nfs_file_open_context(iocb->ki_filp));
l_ctx = nfs_get_lock_context(dreq->ctx);
if (IS_ERR(l_ctx)) {
@@ -710,6 +713,7 @@
user_addr += req_len;
pos += req_len;
count -= req_len;
+ dreq->bytes_left -= req_len;
}
/* The nfs_page now hold references to these pages */
nfs_direct_release_pages(pagevec, npages);
@@ -860,6 +864,7 @@
goto out;
dreq->inode = inode;
+ dreq->bytes_left = count;
dreq->ctx = get_nfs_open_context(nfs_file_open_context(iocb->ki_filp));
l_ctx = nfs_get_lock_context(dreq->ctx);
if (IS_ERR(l_ctx)) {