1 // SPDX-License-Identifier: GPL-2.0
5  * Copyright (c) 2020-2021 Huawei Device Co., Ltd.
22  * = DOMAIN {3} : lower's dev_id {29} : lower's ino_raw {32}
60 	/* The lower inode of local/merge/root(part) inode */
76  * iget_test - whether or not the inode with matched hashval is the one we are
88 	WARN_ON(ia->ino.domain < DOMAIN_ROOT ||  in iget_test()
89 		ia->ino.domain >= DOMAIN_INVALID);  in iget_test()
91 	if ((read_ino_domain(inode->i_ino) == DOMAIN_ROOT) ||  in iget_test()
92 	    (read_ino_domain(inode->i_ino) != ia->ino.domain))  in iget_test()
95 	switch (ia->ino.domain) {  in iget_test()
96 	case DOMAIN_MERGE_VIEW:  in iget_test()
97 	case DOMAIN_CLOUD_MERGE_VIEW:  in iget_test()
98 		res = (ia->lo_i == hii->lower_inode);  in iget_test()
100 	case DOMAIN_DEVICE_LOCAL:  in iget_test()
101 		res = (ia->lo_i == hii->lower_inode);  in iget_test()
103 	case DOMAIN_DEVICE_REMOTE:  in iget_test()
104 		res = (ia->peer == hii->conn &&  in iget_test()
105 		       ia->remote_ino == hii->remote_ino);  in iget_test()
107 	case DOMAIN_DEVICE_CLOUD:  in iget_test()
108 		res = (ia->cloud_record_id &&  in iget_test()
109 		       (memcmp(ia->cloud_record_id, hii->cloud_record_id,  in iget_test()
111 		       (ia->reserved[0] == hii->reserved[0]));  in iget_test()
119  * iget_set - initialize a inode with iget_args
129 	inode->i_ino = ia->ino.ino_output;  in iget_set()
132 	hii->conn = ia->peer;  in iget_set()
133 	hii->remote_ino = ia->remote_ino;  in iget_set()
134 	hii->lower_inode = ia->lo_i;  in iget_set()
136 	if (ia->cloud_record_id) {  in iget_set()
137 		memcpy(hii->cloud_record_id, ia->cloud_record_id, CLOUD_RECORD_ID_LEN);  in iget_set()
138 		memcpy(hii->reserved, ia->reserved, CLOUD_DENTRY_RESERVED_LENGTH);  in iget_set()
158  * hmdfs_iget5_locked_merge - obtain an inode for the merge-view
161  * @fst_lo_i: the lower inode of it's first comrade
163  * Simply replace the lower's domain for a new ino.
177 		hmdfs_err("Received a invalid lower inode");  in hmdfs_iget5_locked_merge()
181 	ia.ino.ino_raw = d_inode(fst_lo_d)->i_ino;  in hmdfs_iget5_locked_merge()
182 	ia.ino.dev_id = hmdfs_d(fst_lo_d)->device_id;  in hmdfs_iget5_locked_merge()
199 		hmdfs_err("Received a invalid lower inode");  in hmdfs_iget5_locked_cloud_merge()
203 	ia.ino.ino_raw = d_inode(fst_lo_d)->i_ino;  in hmdfs_iget5_locked_cloud_merge()
204 	ia.ino.dev_id = hmdfs_d(fst_lo_d)->device_id;  in hmdfs_iget5_locked_cloud_merge()
210  * hmdfs_iget5_locked_local - obtain an inode for the local-dev-view
213  * @lo_i: the lower inode from local filesystem
230 		hmdfs_err("Received a invalid lower inode");  in hmdfs_iget5_locked_local()
233 	ia.ino.ino_raw = make_ino_raw_dev_local(lo_i->i_ino);  in hmdfs_iget5_locked_local()
240  * hmdfs_iget5_locked_remote - obtain an inode for the remote-dev-view
270 	ia.ino.dev_id = peer->device_id;  in hmdfs_iget5_locked_remote()
276  * hmdfs_iget5_locked_cloud - obtain an inode for the cloud-dev-view
296 		.cloud_record_id = res->record_id,  in hmdfs_iget5_locked_cloud()
297 		.reserved = res->reserved,  in hmdfs_iget5_locked_cloud()
306 	ia.ino.ino_raw = make_ino_raw_cloud(res->record_id) + res->reserved[0];  in hmdfs_iget5_locked_cloud()
307 	ia.ino.dev_id = peer->device_id;  in hmdfs_iget5_locked_cloud()
322 		.ino.dev_id = peer ? peer->device_id : 0,  in hmdfs_iget_locked_root()