1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Copyright (C) 2001 Cluster File Systems, Inc. <braam@clusterfs.com>
6 * This file is part of Lustre, http://www.lustre.org.
8 * Lustre is free software; you can redistribute it and/or
9 * modify it under the terms of version 2 of the GNU General Public
10 * License as published by the Free Software Foundation.
12 * Lustre is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with Lustre; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 * MDS data structures.
22 * See also lustre_idl.h for wire formats of requests.
29 #include <linux/obd_support.h>
33 struct vfsmount *pwdmnt;
39 #define LUSTRE_MDS_NAME "mds"
43 struct task_struct *mds_thread;
44 wait_queue_head_t mds_waitq;
45 wait_queue_head_t mds_done_waitq;
46 struct timer_list *mds_timer;
49 struct list_head mds_reqs;
50 struct super_block * mds_sb;
51 struct vfsmount *mds_vfsmnt;
52 struct mds_run_ctxt mds_ctxt;
55 struct file_operations *mds_fop;
56 struct inode_operations *mds_iop;
57 struct address_space_operations *mds_aops;
62 struct list_head rq_list;
63 struct mds_obd *rq_obd;
68 struct mds_req_hdr *rq_reqhdr;
69 struct mds_req *rq_req;
73 struct mds_rep_hdr *rq_rephdr;
74 struct mds_rep *rq_rep;
76 void * rq_reply_handle;
77 wait_queue_head_t rq_wait_for_rep;
81 /* more or less identical to the packed structure, except for the pointers */
83 struct lustre_fid fid1;
84 struct lustre_fid fid2;
105 /* more or less identical to the packed structure, except for the pointers */
107 struct lustre_fid fid1;
108 struct lustre_fid fid2;
131 int mds_pack_req(char *name, int namelen, char *tgt, int tgtlen, struct mds_req_hdr **hdr, struct mds_req **req, int *len, char **buf);
132 int mds_unpack_req(char *buf, int len, struct mds_req_hdr **hdr, struct mds_req **req);
133 int mds_pack_rep(char *name, int namelen, char *tgt, int tgtlen, struct mds_rep_hdr **hdr, struct mds_rep **rep, int *len, char **buf);
134 int mds_unpack_rep(char *buf, int len, struct mds_rep_hdr **hdr, struct mds_rep **rep);
137 /* llight/request.c */
138 int mdc_getattr(ino_t ino, int type, int valid,
139 struct mds_rep **mds_reply, struct mds_rep_hdr **hdr);
140 int mdc_readpage(ino_t ino, int type, __u64 offset, char *addr,
141 struct mds_rep **rep, struct mds_rep_hdr **hdr);
145 /* ioctls for trying requests */
146 #define IOC_REQUEST_TYPE 'f'
147 #define IOC_REQUEST_MIN_NR 30
149 #define IOC_REQUEST_GETATTR _IOWR('f', 30, long)
150 #define IOC_REQUEST_READPAGE _IOWR('f', 31, long)
151 #define IOC_REQUEST_MAX_NR 31