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>
34 #include <linux/lustre_handles.h>
35 #include <libcfs/kp30.h>
36 #include <linux/lustre_idl.h>
37 #include <linux/lustre_lib.h>
38 #include <linux/lustre_dlm.h>
39 #include <linux/lustre_log.h>
40 #include <linux/lustre_export.h>
41 #include <linux/lustre_ucache.h>
43 struct ldlm_lock_desc;
45 struct ptlrpc_connection;
48 struct ptlrpc_request;
52 #define LUSTRE_MDS_NAME "mds"
53 #define LUSTRE_MDT_NAME "mdt"
54 #define LUSTRE_MDC_NAME "mdc"
56 struct mds_update_record {
58 struct lustre_id *ur_id1;
59 struct lustre_id *ur_id2;
68 int ur_cookielen; /* obsolete? */
69 struct llog_cookie *ur_logcookies; /* obsolete? */
70 struct iattr ur_iattr;
71 struct lvfs_ucred ur_uc;
78 #define ur_fsuid ur_uc.luc_fsuid
79 #define ur_fsgid ur_uc.luc_fsgid
80 #define ur_cap ur_uc.luc_cap
81 #define ur_uid ur_uc.luc_uid
84 #define MDS_LR_SERVER_SIZE 512
86 #define MDS_LR_CLIENT_START 8192
87 #define MDS_LR_CLIENT_SIZE 128
88 #if MDS_LR_CLIENT_START < MDS_LR_SERVER_SIZE
89 #error "Can't have MDS_LR_CLIENT_START < MDS_LR_SERVER_SIZE"
92 #define MDS_CLIENT_SLOTS 17
94 #define MDS_ROCOMPAT_LOVOBJID 0x00000001
95 #define MDS_ROCOMPAT_SUPP (MDS_ROCOMPAT_LOVOBJID)
97 #define MDS_INCOMPAT_SUPP (0)
99 #define MDS_MASTER_OBD 1
100 #define MDS_CACHE_OBD 0
102 /*flags for indicate the record are come from cmobd reint or
104 #define REC_REINT_CREATE 0x0001
106 /* Data stored per server at the head of the last_rcvd file. In le32 order.
107 * Try to keep this the same as fsd_server_data so we might one day merge. */
108 struct mds_server_data {
109 __u8 msd_uuid[40]; /* server UUID */
110 __u64 msd_last_transno; /* last completed transaction ID */
111 __u64 msd_mount_count; /* MDS incarnation number */
113 __u32 msd_feature_compat; /* compatible feature flags */
114 __u32 msd_feature_rocompat;/* read-only compatible feature flags */
115 __u32 msd_feature_incompat;/* incompatible feature flags */
116 __u32 msd_server_size; /* size of server data area */
117 __u32 msd_client_start; /* start of per-client data area */
118 __u16 msd_client_size; /* size of per-client data area */
119 __u16 msd_subdir_count; /* number of subdirectories for objects */
120 __u64 msd_catalog_oid; /* recovery catalog object id */
121 __u32 msd_catalog_ogen; /* recovery catalog inode generation */
122 __u8 msd_peeruuid[40]; /* UUID of LOV/OSC associated with MDS */
123 __u8 msd_padding[MDS_LR_SERVER_SIZE - 140];
126 /* Data stored per client in the last_rcvd file. In le32 order. */
127 struct mds_client_data {
128 __u8 mcd_uuid[40]; /* client UUID */
129 __u64 mcd_last_transno; /* last completed transaction ID */
130 __u64 mcd_last_xid; /* xid for the last transaction */
131 __u32 mcd_last_result; /* result from last RPC */
132 __u32 mcd_last_data; /* per-op data (disposition for open &c.) */
133 /* for MDS_CLOSE requests */
134 __u64 mcd_last_close_transno; /* last completed transaction ID */
135 __u64 mcd_last_close_xid; /* xid for the last transaction */
136 __u32 mcd_last_close_result; /* result from last RPC */
137 __u32 mcd_last_close_data; /* per-op data (disposition for open &c.) */
138 __u8 mcd_padding[MDS_LR_CLIENT_SIZE - 88];
141 /* simple uid/gid mapping hash table */
142 struct mds_idmap_item {
143 struct list_head hash;
148 #define MDS_IDMAP_HASHSIZE (32)
149 struct mds_idmap_table {
150 struct list_head uidmap[MDS_IDMAP_HASHSIZE];
151 struct list_head gidmap[MDS_IDMAP_HASHSIZE];
154 /* file data for open files on MDS */
155 struct mds_file_data {
156 struct portals_handle mfd_handle; /* must be first */
157 atomic_t mfd_refcount;
158 struct list_head mfd_list;
161 struct dentry *mfd_dentry;
164 /* group hash table */
165 struct mds_grp_hash_entry {
166 struct list_head ge_hash;
167 struct group_info *ge_group_info;
170 atomic_t ge_refcount;
171 wait_queue_head_t ge_waitq;
172 long ge_acquisition_time;
173 unsigned long ge_acquire_expire;
174 unsigned long ge_expire;
177 #define MDSGRP_HASH_SIZE (128)
178 #define MDSGRP_HASH_INDEX(id) ((id) & (MDSGRP_HASH_SIZE - 1))
179 #define MDSGRP_UPCALL_MAXPATH (1024)
181 struct mds_grp_hash {
182 struct list_head gh_table[MDSGRP_HASH_SIZE];
184 char gh_upcall[MDSGRP_UPCALL_MAXPATH];
186 int gh_acquire_expire;
187 unsigned int gh_allow_setgroups:1;
190 /* lustre security descriptor */
191 struct lustre_sec_desc {
194 struct group_info *lsd_ginfo;
195 unsigned int lsd_allow_setuid:1,
200 struct lsd_cache_entry {
201 struct upcall_cache_entry base;
202 struct lustre_sec_desc lsd;
205 struct lsd_downcall_args {
216 /* mds/mds_reint.c */
217 int mds_reint_rec(struct mds_update_record *r, int offset,
218 struct ptlrpc_request *req, struct lustre_handle *);
223 mds_id2dentry(struct obd_device *obd, struct lustre_id *id,
224 struct vfsmount **mnt);
227 mds_id2locked_dentry(struct obd_device *obd, struct lustre_id *id,
228 struct vfsmount **mnt, int lock_mode,
229 struct lustre_handle *lockh, int *pmode,
230 char *name, int namelen, __u64 lockpart);
231 int mds_update_server_data(struct obd_device *, int force_sync);
232 int mds_update_last_fid(struct obd_device *obd, void *handle,
236 int mds_fs_setup(struct obd_device *obddev, struct vfsmount *mnt);
237 int mds_fs_cleanup(struct obd_device *obddev, int failover);
242 /* mdc/mdc_locks.c */
243 int it_disposition(struct lookup_intent *it, int flag);
244 void it_set_disposition(struct lookup_intent *it, int flag);
245 int it_open_error(int phase, struct lookup_intent *it);
246 int mdc_set_lock_data(struct obd_export *exp, __u64 *lockh, void *data);
247 int mdc_change_cbdata(struct obd_export *exp, struct lustre_id *id,
248 ldlm_iterator_t it, void *data);
249 int mdc_intent_lock(struct obd_export *exp, struct lustre_id *parent,
250 const char *name, int len, void *lmm, int lmmsize,
251 struct lustre_id *child, struct lookup_intent *, int,
252 struct ptlrpc_request **reqp,
253 ldlm_blocking_callback cb_blocking);
254 int mdc_enqueue(struct obd_export *exp,
256 struct lookup_intent *it,
258 struct mdc_op_data *data,
259 struct lustre_handle *lockh,
262 ldlm_completion_callback cb_completion,
263 ldlm_blocking_callback cb_blocking,
266 /* mdc/mdc_request.c */
267 int mdc_get_secdesc_size(void);
268 void mdc_pack_secdesc(struct ptlrpc_request *req, int size);
269 int mdc_req2lustre_md(struct obd_export *exp_lmv, struct ptlrpc_request *req,
270 unsigned int offset, struct obd_export *exp_lov,
271 struct lustre_md *md);
272 int mdc_getstatus(struct obd_export *exp, struct lustre_id *rootid);
273 int mdc_getattr(struct obd_export *exp, struct lustre_id *id,
274 __u64 valid, const char *ea_name, int ea_namelen,
275 unsigned int ea_size, struct ptlrpc_request **request);
276 int mdc_getattr_lock(struct obd_export *exp, struct lustre_id *id,
277 char *filename, int namelen, __u64 valid,
278 unsigned int ea_size, struct ptlrpc_request **request);
279 int mdc_setattr(struct obd_export *exp, struct mdc_op_data *data,
280 struct iattr *iattr, void *ea, int ealen, void *ea2, int ea2len,
281 struct ptlrpc_request **request);
282 int mdc_open(struct obd_export *exp, obd_id ino, int type, int flags,
283 struct lov_mds_md *lmm, int lmm_size, struct lustre_handle *fh,
284 struct ptlrpc_request **);
286 struct obd_client_handle;
288 int mdc_set_open_replay_data(struct obd_export *exp,
289 struct obd_client_handle *och,
290 struct ptlrpc_request *open_req);
291 int mdc_clear_open_replay_data(struct obd_export *exp,
292 struct obd_client_handle *och);
293 int mdc_close(struct obd_export *, struct obdo *, struct obd_client_handle *,
294 struct ptlrpc_request **);
295 int mdc_readpage(struct obd_export *exp, struct lustre_id *id,
296 __u64, struct page *, struct ptlrpc_request **);
297 int mdc_create(struct obd_export *exp, struct mdc_op_data *op_data,
298 const void *data, int datalen, int mode, __u32 uid, __u32 gid,
299 __u64 rdev, struct ptlrpc_request **request);
300 int mdc_unlink(struct obd_export *exp, struct mdc_op_data *data,
301 struct ptlrpc_request **request);
302 int mdc_link(struct obd_export *exp, struct mdc_op_data *data,
303 struct ptlrpc_request **);
304 int mdc_rename(struct obd_export *exp, struct mdc_op_data *data,
305 const char *old, int oldlen, const char *new, int newlen,
306 struct ptlrpc_request **request);
307 int mdc_sync(struct obd_export *exp, struct lustre_id *id,
308 struct ptlrpc_request **);
309 int mdc_create_client(struct obd_uuid uuid, struct ptlrpc_client *cl);
311 /* store the generation of a newly-created inode in |req| for replay. */
312 int mdc_store_inode_generation(struct obd_export *exp,
313 struct ptlrpc_request *req,
314 int reqoff, int repoff);
316 int mdc_llog_process(struct obd_export *, char *, llog_cb_t,
319 int mdc_done_writing(struct obd_export *, struct obdo *);
321 /* ioctls for trying requests */
322 #define IOC_REQUEST_TYPE 'f'
323 #define IOC_REQUEST_MIN_NR 30
325 #define IOC_REQUEST_GETATTR _IOWR('f', 30, long)
326 #define IOC_REQUEST_READPAGE _IOWR('f', 31, long)
327 #define IOC_REQUEST_SETATTR _IOWR('f', 32, long)
328 #define IOC_REQUEST_CREATE _IOWR('f', 33, long)
329 #define IOC_REQUEST_OPEN _IOWR('f', 34, long)
330 #define IOC_REQUEST_CLOSE _IOWR('f', 35, long)
331 #define IOC_REQUEST_MAX_NR 35
333 #define MDS_CHECK_RESENT(req, reconstruct) \
335 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_RESENT) { \
336 struct mds_client_data *mcd = \
337 req->rq_export->exp_mds_data.med_mcd; \
339 if (le64_to_cpu(mcd->mcd_last_xid) == req->rq_xid) { \
341 RETURN(le32_to_cpu(mcd->mcd_last_result)); \
343 if (le64_to_cpu(mcd->mcd_last_close_xid) == req->rq_xid) { \
345 RETURN(le32_to_cpu(mcd->mcd_last_close_result));\
347 DEBUG_REQ(D_HA, req, "no reply for RESENT req" \
348 "(have "LPD64", and "LPD64")", \
349 mcd->mcd_last_xid, mcd->mcd_last_close_xid); \