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-rw-r--r--fs/cifs/smb2ops.c82
1 files changed, 82 insertions, 0 deletions
diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index c571be8cb76e..11dde4b24f8a 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -494,6 +494,85 @@ smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
}
static int
+SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
+ u64 persistent_fid, u64 volatile_fid,
+ struct copychunk_ioctl *pcchunk)
+{
+ int rc;
+ unsigned int ret_data_len;
+ struct resume_key_req *res_key;
+
+ rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
+ FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */,
+ NULL, 0 /* no input */,
+ (char **)&res_key, &ret_data_len);
+
+ if (rc) {
+ cifs_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
+ goto req_res_key_exit;
+ }
+ if (ret_data_len < sizeof(struct resume_key_req)) {
+ cifs_dbg(VFS, "Invalid refcopy resume key length\n");
+ rc = -EINVAL;
+ goto req_res_key_exit;
+ }
+ memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
+
+req_res_key_exit:
+ kfree(res_key);
+ return rc;
+}
+
+static int
+smb2_clone_range(const unsigned int xid,
+ struct cifsFileInfo *srcfile,
+ struct cifsFileInfo *trgtfile, u64 src_off,
+ u64 len, u64 dest_off)
+{
+ int rc;
+ unsigned int ret_data_len;
+ struct copychunk_ioctl *pcchunk;
+ char *retbuf = NULL;
+
+ pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
+
+ if (pcchunk == NULL)
+ return -ENOMEM;
+
+ cifs_dbg(FYI, "in smb2_clone_range - about to call request res key\n");
+ /* Request a key from the server to identify the source of the copy */
+ rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
+ srcfile->fid.persistent_fid,
+ srcfile->fid.volatile_fid, pcchunk);
+
+ /* Note: request_res_key sets res_key null only if rc !=0 */
+ if (rc)
+ return rc;
+
+ /* For now array only one chunk long, will make more flexible later */
+ pcchunk->ChunkCount = __constant_cpu_to_le32(1);
+ pcchunk->Reserved = 0;
+ pcchunk->SourceOffset = cpu_to_le64(src_off);
+ pcchunk->TargetOffset = cpu_to_le64(dest_off);
+ pcchunk->Length = cpu_to_le32(len);
+ pcchunk->Reserved2 = 0;
+
+ /* Request that server copy to target from src file identified by key */
+ rc = SMB2_ioctl(xid, tlink_tcon(trgtfile->tlink),
+ trgtfile->fid.persistent_fid,
+ trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
+ true /* is_fsctl */, (char *)pcchunk,
+ sizeof(struct copychunk_ioctl), &retbuf, &ret_data_len);
+
+ /* BB need to special case rc = EINVAL to alter chunk size */
+
+ cifs_dbg(FYI, "rc %d data length out %d\n", rc, ret_data_len);
+
+ kfree(pcchunk);
+ return rc;
+}
+
+static int
smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
struct cifs_fid *fid)
{
@@ -1017,6 +1096,7 @@ struct smb_version_operations smb20_operations = {
.set_oplock_level = smb2_set_oplock_level,
.create_lease_buf = smb2_create_lease_buf,
.parse_lease_buf = smb2_parse_lease_buf,
+ .clone_range = smb2_clone_range,
};
struct smb_version_operations smb21_operations = {
@@ -1090,6 +1170,7 @@ struct smb_version_operations smb21_operations = {
.set_oplock_level = smb21_set_oplock_level,
.create_lease_buf = smb2_create_lease_buf,
.parse_lease_buf = smb2_parse_lease_buf,
+ .clone_range = smb2_clone_range,
};
struct smb_version_operations smb30_operations = {
@@ -1165,6 +1246,7 @@ struct smb_version_operations smb30_operations = {
.set_oplock_level = smb3_set_oplock_level,
.create_lease_buf = smb3_create_lease_buf,
.parse_lease_buf = smb3_parse_lease_buf,
+ .clone_range = smb2_clone_range,
};
struct smb_version_values smb20_values = {