Signed-off-by: Olga Kornievskaia <kolga@xxxxxxxxxx>
---
fs/nfs/nfs42.h | 5 ++++-
fs/nfs/nfs42proc.c | 42 ++++++++++++++++++++++++++++++++++++++++++
2 files changed, 46 insertions(+), 1 deletion(-)
diff --git a/fs/nfs/nfs42.h b/fs/nfs/nfs42.h
index b6cd153..54b9941 100644
--- a/fs/nfs/nfs42.h
+++ b/fs/nfs/nfs42.h
@@ -12,6 +12,7 @@
#define PNFS_LAYOUTSTATS_MAXDEV (4)
/* nfs4.2proc.c */
+#if defined(CONFIG_NFS_V4_2)
int nfs42_proc_allocate(struct file *, loff_t, loff_t);
ssize_t nfs42_proc_copy(struct file *, loff_t, struct file *, loff_t, size_t);
int nfs42_proc_deallocate(struct file *, loff_t, loff_t);
@@ -19,5 +20,7 @@
int nfs42_proc_layoutstats_generic(struct nfs_server *,
struct nfs42_layoutstat_data *);
int nfs42_proc_clone(struct file *, struct file *, loff_t, loff_t, loff_t);
-
+int nfs42_proc_offload_status(struct file *, nfs4_stateid *,
+ struct nfs42_offload_status_res *);
+#endif /* CONFIG_NFS_V4_2) */
#endif /* __LINUX_FS_NFS_NFS4_2_H */
diff --git a/fs/nfs/nfs42proc.c b/fs/nfs/nfs42proc.c
index 6c2db51..5c42e71 100644
--- a/fs/nfs/nfs42proc.c
+++ b/fs/nfs/nfs42proc.c
@@ -263,6 +263,48 @@ ssize_t nfs42_proc_copy(struct file *src, loff_t pos_src,
return err;
}
+int _nfs42_proc_offload_status(struct file *dst, nfs4_stateid *stateid,
+ struct nfs42_offload_status_res *res)
+{
+ struct nfs42_offload_status_args args;
+ struct nfs_server *dst_server = NFS_SERVER(file_inode(dst));
+ struct rpc_message msg = {
+ .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OFFLOAD_STATUS],
+ .rpc_resp = res,
+ .rpc_argp = &args,
+ };
+ int status;
+
+ args.osa_src_fh = NFS_FH(file_inode(dst));
+ memcpy(&args.osa_stateid, stateid, sizeof(args.osa_stateid));
+ status = nfs4_call_sync(dst_server->client, dst_server, &msg,
+ &args.osa_seq_args, &res->osr_seq_res, 0);
+ if (status == -ENOTSUPP)
+ dst_server->caps &= ~NFS_CAP_OFFLOAD_STATUS;
+
+ return status;
+}
+
+int nfs42_proc_offload_status(struct file *dst, nfs4_stateid *stateid,
+ struct nfs42_offload_status_res *res)
+{
+ struct nfs_server *dst_server = NFS_SERVER(file_inode(dst));
+ struct nfs4_exception exception = { };
+ int status;
+
+ if (!(dst_server->caps & NFS_CAP_OFFLOAD_STATUS))
+ return -EOPNOTSUPP;
+
+ do {
+ status = _nfs42_proc_offload_status(dst, stateid, res);
+ if (status == -ENOTSUPP)
+ return -EOPNOTSUPP;
+ status = nfs4_handle_exception(dst_server, status, &exception);
+ } while (exception.retry);
+
+ return status;
+}
+
static loff_t _nfs42_proc_llseek(struct file *filep,
struct nfs_lock_context *lock, loff_t offset, int whence)
{
--
1.8.3.1
--
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