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authorPeng Tao <tao.peng@primarydata.com>2015-09-25 21:24:35 +0300
committerTrond Myklebust <trond.myklebust@primarydata.com>2015-10-15 23:07:36 +0300
commite5341f3a5762d17be9cdd06257c02c0098bdcab8 (patch)
treef915d5fdbad1a5a0d0840f0847610f410887ba9b /fs/nfs
parent36022770de6cf9a403c40a68712ed2d2ea2746be (diff)
downloadlinux-e5341f3a5762d17be9cdd06257c02c0098bdcab8.tar.xz
nfs42: add CLONE proc functions
Signed-off-by: Peng Tao <tao.peng@primarydata.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Diffstat (limited to 'fs/nfs')
-rw-r--r--fs/nfs/nfs42.h1
-rw-r--r--fs/nfs/nfs42proc.c71
-rw-r--r--fs/nfs/nfs4proc.c3
3 files changed, 74 insertions, 1 deletions
diff --git a/fs/nfs/nfs42.h b/fs/nfs/nfs42.h
index 814c1255f1d2..b587ccd31083 100644
--- a/fs/nfs/nfs42.h
+++ b/fs/nfs/nfs42.h
@@ -17,5 +17,6 @@ int nfs42_proc_deallocate(struct file *, loff_t, loff_t);
loff_t nfs42_proc_llseek(struct file *, loff_t, int);
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);
#endif /* __LINUX_FS_NFS_NFS4_2_H */
diff --git a/fs/nfs/nfs42proc.c b/fs/nfs/nfs42proc.c
index 0f020e4d8421..3e92a3cde15d 100644
--- a/fs/nfs/nfs42proc.c
+++ b/fs/nfs/nfs42proc.c
@@ -271,3 +271,74 @@ int nfs42_proc_layoutstats_generic(struct nfs_server *server,
return PTR_ERR(task);
return 0;
}
+
+static int _nfs42_proc_clone(struct rpc_message *msg, struct file *src_f,
+ struct file *dst_f, loff_t src_offset,
+ loff_t dst_offset, loff_t count)
+{
+ struct inode *src_inode = file_inode(src_f);
+ struct inode *dst_inode = file_inode(dst_f);
+ struct nfs_server *server = NFS_SERVER(dst_inode);
+ struct nfs42_clone_args args = {
+ .src_fh = NFS_FH(src_inode),
+ .dst_fh = NFS_FH(dst_inode),
+ .src_offset = src_offset,
+ .dst_offset = dst_offset,
+ .dst_bitmask = server->cache_consistency_bitmask,
+ };
+ struct nfs42_clone_res res = {
+ .server = server,
+ };
+ int status;
+
+ msg->rpc_argp = &args;
+ msg->rpc_resp = &res;
+
+ status = nfs42_set_rw_stateid(&args.src_stateid, src_f, FMODE_READ);
+ if (status)
+ return status;
+
+ status = nfs42_set_rw_stateid(&args.dst_stateid, dst_f, FMODE_WRITE);
+ if (status)
+ return status;
+
+ res.dst_fattr = nfs_alloc_fattr();
+ if (!res.dst_fattr)
+ return -ENOMEM;
+
+ status = nfs4_call_sync(server->client, server, msg,
+ &args.seq_args, &res.seq_res, 0);
+ if (status == 0)
+ status = nfs_post_op_update_inode(dst_inode, res.dst_fattr);
+
+ kfree(res.dst_fattr);
+ return status;
+}
+
+int nfs42_proc_clone(struct file *src_f, struct file *dst_f,
+ loff_t src_offset, loff_t dst_offset, loff_t count)
+{
+ struct rpc_message msg = {
+ .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLONE],
+ };
+ struct inode *inode = file_inode(src_f);
+ struct nfs_server *server = NFS_SERVER(file_inode(src_f));
+ struct nfs4_exception exception = { };
+ int err;
+
+ if (!nfs_server_capable(inode, NFS_CAP_CLONE))
+ return -EOPNOTSUPP;
+
+ do {
+ err = _nfs42_proc_clone(&msg, src_f, dst_f, src_offset,
+ dst_offset, count);
+ if (err == -ENOTSUPP || err == -EOPNOTSUPP) {
+ NFS_SERVER(inode)->caps &= ~NFS_CAP_CLONE;
+ return -EOPNOTSUPP;
+ }
+ err = nfs4_handle_exception(server, err, &exception);
+ } while (exception.retry);
+
+ return err;
+
+}
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 5133bb18830e..9688b1a9787f 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -8729,7 +8729,8 @@ static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
| NFS_CAP_ALLOCATE
| NFS_CAP_DEALLOCATE
| NFS_CAP_SEEK
- | NFS_CAP_LAYOUTSTATS,
+ | NFS_CAP_LAYOUTSTATS
+ | NFS_CAP_CLONE,
.init_client = nfs41_init_client,
.shutdown_client = nfs41_shutdown_client,
.match_stateid = nfs41_match_stateid,