Signed-off-by: Peng Tao <tao.p...@primarydata.com>
---
fs/nfs/nfs4file.c | 95 ++++++++++++++++++++++++++++++-------------------------
1 file changed, 52 insertions(+), 43 deletions(-)
diff --git a/fs/nfs/nfs4file.c b/fs/nfs/nfs4file.c
index 4aa5719..f1924d8 100644
--- a/fs/nfs/nfs4file.c
+++ b/fs/nfs/nfs4file.c
@@ -194,15 +194,60 @@ static long nfs42_fallocate(struct file *filep, int mode,
loff_t offset, loff_t
return nfs42_proc_allocate(filep, offset, len);
}
+static ssize_t nfs42_copy_file_range(struct file *file_in, loff_t pos_in,
+ struct file *file_out, loff_t pos_out,
+ size_t len, unsigned int flags)
+{
+ struct inode *src_inode = file_inode(file_in);
+ struct inode *dst_inode = file_inode(file_out);
+ struct nfs_server *server = NFS_SERVER(src_inode);
+ unsigned int bs = server->clone_blksize;
+ int ret;
+
+ /* check alignment w.r.t. clone_blksize */
+ ret = -EINVAL;
+ if (bs) {
+ if (!IS_ALIGNED(pos_in, bs) || !IS_ALIGNED(pos_out, bs) ||
+ (!IS_ALIGNED(len, bs) &&
+ i_size_read(src_inode) != (pos_in + len)))
+ goto out;
+ }
+
+ /* XXX: do we lock at all? what if server needs CB_RECALL_LAYOUT? */
+ lock_two_nondirectories(src_inode, dst_inode);
+
+ /* flush all pending writes on both src and dst so that server
+ * has the latest data
+ */
+ ret = nfs_sync_inode(src_inode);
+ if (ret)
+ goto out_unlock;
+ ret = nfs_sync_inode(dst_inode);
+ if (ret)
+ goto out_unlock;
+
+ ret = nfs42_proc_clone(file_in, file_out, pos_in, pos_out, len);
+
+ /* truncate inode page cache of the dst range so that future
+ * reads can fetch new data from server
+ */
+ if (!ret)
+ truncate_inode_pages_range(&dst_inode->i_data, pos_out,
+ pos_out + len - 1);
+
+out_unlock:
+ unlock_two_nondirectories(src_inode, dst_inode);
+out:
+ return ret < 0 ? ret : len;
+}
+
static noinline long
nfs42_ioctl_clone(struct file *dst_file, unsigned long srcfd,
u64 src_off, u64 dst_off, u64 count)
{
struct inode *dst_inode = file_inode(dst_file);
- struct nfs_server *server = NFS_SERVER(dst_inode);
struct fd src_file;
struct inode *src_inode;
- unsigned int bs = server->clone_blksize;
int ret;
/* dst file must be opened for writing */
@@ -240,48 +285,11 @@ nfs42_ioctl_clone(struct file *dst_file, unsigned long
srcfd,
src_inode->i_sb != dst_inode->i_sb)
goto out_fput;
- /* check alignment w.r.t. clone_blksize */
- ret = -EINVAL;
- if (bs) {
- if (!IS_ALIGNED(src_off, bs) || !IS_ALIGNED(dst_off, bs))
- goto out_fput;
- if (!IS_ALIGNED(count, bs) && i_size_read(src_inode) !=
(src_off + count))
- goto out_fput;
- }
-
- /* XXX: do we lock at all? what if server needs CB_RECALL_LAYOUT? */
- if (dst_inode < src_inode) {
- mutex_lock_nested(&dst_inode->i_mutex, I_MUTEX_PARENT);
- mutex_lock_nested(&src_inode->i_mutex, I_MUTEX_CHILD);
- } else {
- mutex_lock_nested(&src_inode->i_mutex, I_MUTEX_PARENT);
- mutex_lock_nested(&dst_inode->i_mutex, I_MUTEX_CHILD);
- }
-
- /* flush all pending writes on both src and dst so that server
- * has the latest data */
- ret = nfs_sync_inode(src_inode);
- if (ret)
- goto out_unlock;
- ret = nfs_sync_inode(dst_inode);
- if (ret)
- goto out_unlock;
-
- ret = nfs42_proc_clone(src_file.file, dst_file, src_off, dst_off,
count);
-
- /* truncate inode page cache of the dst range so that future reads can
fetch
- * new data from server */
- if (!ret)
- truncate_inode_pages_range(&dst_inode->i_data, dst_off, dst_off
+ count - 1);
+ ret = nfs42_copy_file_range(src_file.file, src_off, dst_file,
+ dst_off, count, 0);
+ if (ret > 0)
+ ret = 0;
-out_unlock:
- if (dst_inode < src_inode) {
- mutex_unlock(&src_inode->i_mutex);
- mutex_unlock(&dst_inode->i_mutex);
- } else {
- mutex_unlock(&dst_inode->i_mutex);
- mutex_unlock(&src_inode->i_mutex);
- }
out_fput:
fdput(src_file);
out_drop_write:
@@ -344,6 +352,7 @@ const struct file_operations nfs4_file_operations = {
.splice_write = iter_file_splice_write,
#ifdef CONFIG_NFS_V4_2
.fallocate = nfs42_fallocate,
+ .copy_file_range = nfs42_copy_file_range,
#endif /* CONFIG_NFS_V4_2 */
.check_flags = nfs_check_flags,
.setlease = simple_nosetlease,
--
1.8.3.1
--
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