1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Copyright (C) 2001-2003 Cluster File Systems, Inc. <info@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.
30 # include <linux/fs.h>
31 # include <linux/dcache.h>
33 #include <linux/lustre_handles.h>
34 #include <linux/kp30.h>
35 #include <linux/lustre_idl.h>
36 #include <linux/lustre_lib.h>
37 #include <linux/lustre_dlm.h>
38 #include <linux/lustre_log.h>
39 #include <linux/lustre_export.h>
41 struct ldlm_lock_desc;
43 struct ptlrpc_connection;
46 struct ptlrpc_request;
50 #define LUSTRE_MDS_NAME "mds"
51 #define LUSTRE_MDT_NAME "mdt"
52 #define LUSTRE_MDC_NAME "mdc"
55 struct mds_body *body;
56 struct lov_stripe_md *lsm;
69 struct mds_update_record {
71 struct ll_fid *ur_fid1;
72 struct ll_fid *ur_fid2;
80 struct llog_cookie *ur_logcookies;
81 struct iattr ur_iattr;
82 struct obd_ucred ur_uc;
89 #define ur_fsuid ur_uc.ouc_fsuid
90 #define ur_fsgid ur_uc.ouc_fsgid
91 #define ur_cap ur_uc.ouc_cap
92 #define ur_suppgid1 ur_uc.ouc_suppgid1
93 #define ur_suppgid2 ur_uc.ouc_suppgid2
95 /* i_attr_flags holds the open count in the inode in 2.4 */
96 //XXX Alex implement on 2.4 with i_attr_flags and find soln for 2.5 please
97 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
98 # define mds_open_orphan_count(inode) (0)
99 # define mds_open_orphan_inc(inode) do { } while (0);
100 # define mds_open_orphan_dec_test(inode) (0)
102 # define mds_inode_oatomic(inode) ((atomic_t *)&(inode)->i_attr_flags)
103 # define mds_open_orphan_count(inode) \
104 atomic_read(mds_inode_oatomic(inode))
105 # define mds_open_orphan_inc(inode) \
106 atomic_inc(mds_inode_oatomic(inode))
107 # define mds_open_orphan_dec_test(inode) \
108 atomic_dec_and_test(mds_inode_oatomic(inode))
110 #define mds_inode_is_orphan(inode) ((inode)->i_flags & 0x4000000)
111 #define mds_inode_set_orphan(inode) (inode)->i_flags |= 0x4000000
113 #define MDS_LR_SERVER_SIZE 512
115 #define MDS_LR_CLIENT_START 8192
116 #define MDS_LR_CLIENT_SIZE 128
117 #if MDS_LR_CLIENT_START < MDS_LR_SERVER_SIZE
118 #error "Can't have MDS_LR_CLIENT_START < MDS_LR_SERVER_SIZE"
121 #define MDS_CLIENT_SLOTS 17
123 #define MDS_MOUNT_RECOV 2
125 #define MDS_ROCOMPAT_LOVOBJID 0x00000001
126 #define MDS_ROCOMPAT_SUPP (MDS_ROCOMPAT_LOVOBJID)
128 #define MDS_INCOMPAT_SUPP (0)
130 /* Data stored per server at the head of the last_rcvd file. In le32 order.
131 * Try to keep this the same as fsd_server_data so we might one day merge. */
132 struct mds_server_data {
133 __u8 msd_uuid[40]; /* server UUID */
134 __u64 msd_last_transno; /* last completed transaction ID */
135 __u64 msd_mount_count; /* MDS incarnation number */
137 __u32 msd_feature_compat; /* compatible feature flags */
138 __u32 msd_feature_rocompat;/* read-only compatible feature flags */
139 __u32 msd_feature_incompat;/* incompatible feature flags */
140 __u32 msd_server_size; /* size of server data area */
141 __u32 msd_client_start; /* start of per-client data area */
142 __u16 msd_client_size; /* size of per-client data area */
143 __u16 msd_subdir_count; /* number of subdirectories for objects */
144 __u64 msd_catalog_oid; /* recovery catalog object id */
145 __u32 msd_catalog_ogen; /* recovery catalog inode generation */
146 __u8 msd_peeruuid[40]; /* UUID of LOV/OSC associated with MDS */
147 __u8 msd_padding[MDS_LR_SERVER_SIZE - 140];
150 /* Data stored per client in the last_rcvd file. In le32 order. */
151 struct mds_client_data {
152 __u8 mcd_uuid[40]; /* client UUID */
153 __u64 mcd_mount_count; /* MDS incarnation number */
154 __u64 mcd_last_transno; /* last completed transaction ID */
155 __u64 mcd_last_xid; /* xid for the last transaction */
156 __u32 mcd_last_result; /* result from last RPC */
157 __u32 mcd_last_data; /* per-op data (disposition for open &c.) */
158 __u8 mcd_padding[MDS_LR_CLIENT_SIZE - 72];
161 /* file data for open files on MDS */
162 struct mds_file_data {
163 struct portals_handle mfd_handle; /* must be first */
164 atomic_t mfd_refcount;
165 struct list_head mfd_list;
168 struct dentry *mfd_dentry;
171 /* mds/mds_reint.c */
172 int mds_reint_rec(struct mds_update_record *r, int offset,
173 struct ptlrpc_request *req, struct lustre_handle *);
177 struct dentry *mds_name2locked_dentry(struct obd_device *, struct dentry *dir,
178 struct vfsmount **mnt, char *name,
179 int namelen, int lock_mode,
180 struct lustre_handle *lockh,
182 struct dentry *mds_fid2locked_dentry(struct obd_device *obd, struct ll_fid *fid,
183 struct vfsmount **mnt, int lock_mode,
184 struct lustre_handle *lockh,
185 char *name, int namelen);
186 struct dentry *mds_fid2dentry(struct mds_obd *mds, struct ll_fid *fid,
187 struct vfsmount **mnt);
188 int mds_reint(struct ptlrpc_request *req, int offset, struct lustre_handle *);
189 void mds_steal_ack_locks(struct obd_export *exp,
190 struct ptlrpc_request *req);
191 int mds_update_server_data(struct obd_device *, int force_sync);
194 int mds_fs_setup(struct obd_device *obddev, struct vfsmount *mnt);
195 int mds_fs_cleanup(struct obd_device *obddev, int failover);
200 /* mdc/mdc_locks.c */
201 int it_disposition(struct lookup_intent *it, int flag);
202 void it_set_disposition(struct lookup_intent *it, int flag);
203 int it_open_error(int phase, struct lookup_intent *it);
204 void mdc_set_lock_data(__u64 *lockh, void *data);
205 int mdc_change_cbdata(struct obd_export *exp, struct ll_fid *fid,
206 ldlm_iterator_t it, void *data);
207 int mdc_intent_lock(struct obd_export *exp, struct ll_uctxt *,
208 struct ll_fid *parent,
209 const char *name, int len, void *lmm, int lmmsize,
210 struct ll_fid *child,
211 struct lookup_intent *, int,
212 struct ptlrpc_request **reqp,
213 ldlm_blocking_callback cb_blocking);
214 int mdc_enqueue(struct obd_export *exp,
216 struct lookup_intent *it,
218 struct mdc_op_data *data,
219 struct lustre_handle *lockh,
222 ldlm_completion_callback cb_completion,
223 ldlm_blocking_callback cb_blocking,
226 /* mdc/mdc_request.c */
227 int mdc_init_ea_size(struct obd_device *obd, char *lov_name);
228 int mdc_req2lustre_md(struct ptlrpc_request *req, int offset,
229 struct obd_export *exp,
230 struct lustre_md *md);
231 int mdc_getstatus(struct obd_export *exp, struct ll_fid *rootfid);
232 int mdc_getattr(struct obd_export *exp, struct ll_fid *fid,
233 unsigned long valid, unsigned int ea_size,
234 struct ptlrpc_request **request);
235 int mdc_getattr_name(struct obd_export *exp, struct ll_fid *fid,
236 char *filename, int namelen, unsigned long valid,
237 unsigned int ea_size, struct ptlrpc_request **request);
238 int mdc_setattr(struct obd_export *exp, struct mdc_op_data *data,
239 struct iattr *iattr, void *ea, int ealen, void *ea2, int ea2len,
240 struct ptlrpc_request **request);
241 int mdc_open(struct obd_export *exp, obd_id ino, int type, int flags,
242 struct lov_mds_md *lmm, int lmm_size, struct lustre_handle *fh,
243 struct ptlrpc_request **);
244 struct obd_client_handle;
245 void mdc_set_open_replay_data(struct obd_client_handle *och,
246 struct ptlrpc_request *open_req);
247 void mdc_clear_open_replay_data(struct obd_client_handle *och);
248 int mdc_close(struct obd_export *, struct obdo *, struct obd_client_handle *,
249 struct ptlrpc_request **);
250 int mdc_readpage(struct obd_export *exp, struct ll_fid *mdc_fid, __u64 offset,
251 struct page *, struct ptlrpc_request **);
252 int mdc_create(struct obd_export *exp, struct mdc_op_data *op_data,
253 const void *data, int datalen, int mode, __u32 uid, __u32 gid,
254 __u64 rdev, struct ptlrpc_request **request);
255 int mdc_unlink(struct obd_export *exp, struct mdc_op_data *data,
256 struct ptlrpc_request **request);
257 int mdc_link(struct obd_export *exp, struct mdc_op_data *data,
258 struct ptlrpc_request **);
259 int mdc_rename(struct obd_export *exp, struct mdc_op_data *data,
260 const char *old, int oldlen, const char *new, int newlen,
261 struct ptlrpc_request **request);
262 int mdc_sync(struct obd_export *exp, struct ll_fid *fid,
263 struct ptlrpc_request **);
264 int mdc_create_client(struct obd_uuid uuid, struct ptlrpc_client *cl);
266 /* Store the generation of a newly-created inode in |req| for replay. */
267 void mdc_store_inode_generation(struct ptlrpc_request *req, int reqoff,
269 int mdc_llog_process(struct obd_export *, char *logname, llog_cb_t, void *data);
270 int mdc_done_writing(struct obd_export *exp, struct obdo *);
272 static inline void mdc_pack_fid(struct ll_fid *fid, obd_id ino, __u32 gen,
276 fid->generation = gen;
280 /* ioctls for trying requests */
281 #define IOC_REQUEST_TYPE 'f'
282 #define IOC_REQUEST_MIN_NR 30
284 #define IOC_REQUEST_GETATTR _IOWR('f', 30, long)
285 #define IOC_REQUEST_READPAGE _IOWR('f', 31, long)
286 #define IOC_REQUEST_SETATTR _IOWR('f', 32, long)
287 #define IOC_REQUEST_CREATE _IOWR('f', 33, long)
288 #define IOC_REQUEST_OPEN _IOWR('f', 34, long)
289 #define IOC_REQUEST_CLOSE _IOWR('f', 35, long)
290 #define IOC_REQUEST_MAX_NR 35
292 #define MDS_CHECK_RESENT(req, reconstruct) \
294 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_RESENT) { \
295 struct mds_client_data *mcd = \
296 req->rq_export->exp_mds_data.med_mcd; \
297 if (mcd->mcd_last_xid == req->rq_xid) { \
301 DEBUG_REQ(D_HA, req, "no reply for RESENT req (have "LPD64")", \
302 mcd->mcd_last_xid); \