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. <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.
32 #include <linux/lustre_idl.h>
34 struct ldlm_lock_desc;
37 struct ptlrpc_connection;
40 struct ptlrpc_request;
43 #define LUSTRE_MDS_NAME "mds"
44 #define LUSTRE_MDT_NAME "mdt"
45 #define LUSTRE_MDC_NAME "mdc"
47 struct mds_update_record {
51 struct ll_fid *ur_fid1;
52 struct ll_fid *ur_fid2;
57 struct iattr ur_iattr;
65 #define MDS_LR_CLIENT 8192
66 #define MDS_LR_SIZE 128
68 #define MDS_CLIENT_SLOTS 17
70 #define MDS_MOUNT_RECOV 2
72 /* Data stored per server at the head of the last_rcvd file. In le32 order. */
73 struct mds_server_data {
74 __u8 msd_uuid[37]; /* server UUID */
75 __u8 uuid_padding[3]; /* unused */
76 __u64 msd_last_rcvd; /* last completed transaction ID */
77 __u64 msd_mount_count; /* MDS incarnation number */
78 __u8 padding[512 - 56];
81 /* Data stored per client in the last_rcvd file. In le32 order. */
82 struct mds_client_data {
83 __u8 mcd_uuid[37]; /* client UUID */
84 __u8 uuid_padding[3]; /* unused */
85 __u64 mcd_last_rcvd; /* last completed transaction ID */
86 __u64 mcd_mount_count; /* MDS incarnation number */
87 __u64 mcd_last_xid; /* client RPC xid for the last transaction */
88 __u8 padding[MDS_LR_SIZE - 64];
91 /* In-memory access to client data from MDS struct */
92 struct mds_export_data {
93 struct list_head med_open_head;
94 spinlock_t med_open_lock;
95 struct mds_client_data *med_mcd;
99 /* file data for open files on MDS */
100 struct mds_file_data {
101 struct list_head mfd_list;
102 struct lustre_handle mfd_clienthandle;
103 __u64 mfd_servercookie;
104 struct file *mfd_file;
107 /* mds/mds_reint.c */
108 int mds_reint_rec(struct mds_update_record *r, int offset,
109 struct ptlrpc_request *req);
111 /* lib/mds_updates.c */
112 void mds_unpack_body(struct mds_body *b);
113 void mds_unpack_fid(struct ll_fid *fid);
114 void mds_pack_fid(struct ll_fid *fid);
115 void mds_pack_req_body(struct ptlrpc_request *);
116 void mds_pack_rep_body(struct ptlrpc_request *);
117 int mds_update_unpack(struct ptlrpc_request *, int offset,
118 struct mds_update_record *);
120 void mds_getattr_pack(struct ptlrpc_request *req, int offset,
121 struct inode *inode, const char *name, int namelen);
122 void mds_setattr_pack(struct ptlrpc_request *, int offset, struct inode *,
123 struct iattr *, const char *name, int namelen);
124 void mds_create_pack(struct ptlrpc_request *, int offset, struct inode *,
125 __u32 mode, __u64 id, __u32 uid, __u32 gid, __u64 time,
126 const char *name, int namelen, const char *tgt,
128 void mds_unlink_pack(struct ptlrpc_request *, int offset, struct inode *inode,
129 struct inode *child, __u32 mode, const char *name,
131 void mds_link_pack(struct ptlrpc_request *, int offset, struct inode *ino,
132 struct inode *dir, const char *name, int namelen);
133 void mds_rename_pack(struct ptlrpc_request *, int offset, struct inode *srcdir,
134 struct inode *tgtdir, const char *name, int namelen,
135 const char *tgt, int tgtlen);
136 void mds_pack_inode2fid(struct ll_fid *fid, struct inode *inode);
137 void mds_pack_inode2body(struct mds_body *body, struct inode *inode);
140 struct dentry *mds_name2locked_dentry(struct obd_device *, struct dentry *dir,
141 struct vfsmount **mnt, char *name,
142 int namelen, int lock_mode,
143 struct lustre_handle *lockh,
145 struct dentry *mds_fid2locked_dentry(struct obd_device *obd, struct ll_fid *fid,
146 struct vfsmount **mnt, int lock_mode,
147 struct lustre_handle *lockh);
148 struct dentry *mds_fid2dentry(struct mds_obd *mds, struct ll_fid *fid,
149 struct vfsmount **mnt);
150 int mds_reint(int offset, struct ptlrpc_request *req);
152 /* mdc/mdc_request.c */
153 int mdc_enqueue(struct lustre_handle *conn, int lock_type,
154 struct lookup_intent *it, int lock_mode, struct inode *dir,
155 struct dentry *de, struct lustre_handle *lockh, char *tgt,
156 int tgtlen, void *data, int datalen);
157 int mdc_cancel_unused(struct lustre_handle *conn, struct inode *, int flags);
158 int mdc_getlovinfo(struct obd_device *obd, struct lustre_handle *mdc_connh,
159 struct ptlrpc_request **request);
160 int mdc_getstatus(struct lustre_handle *conn, struct ll_fid *rootfid);
161 int mdc_getattr(struct lustre_handle *conn,
162 obd_id ino, int type, unsigned long valid, size_t ea_size,
163 struct ptlrpc_request **request);
164 int mdc_setattr(struct lustre_handle *conn,
165 struct inode *, struct iattr *iattr, struct ptlrpc_request **);
166 int mdc_open(struct lustre_handle *conn, obd_id ino, int type, int flags,
167 struct lov_stripe_md *, struct lustre_handle *fh,
168 struct ptlrpc_request **);
169 int mdc_close(struct lustre_handle *conn, obd_id ino, int type,
170 struct lustre_handle *fh, struct ptlrpc_request **req);
171 int mdc_readpage(struct lustre_handle *conn, obd_id ino,
172 int type, __u64 offset, char *addr, struct ptlrpc_request **);
173 int mdc_create(struct lustre_handle *conn,
174 struct inode *dir, const char *name, int namelen,
175 const char *tgt, int tgtlen, int mode, __u32 uid, __u32 gid,
176 __u64 time, __u64 rdev, struct lov_stripe_md *md,
177 struct ptlrpc_request **);
178 int mdc_unlink(struct lustre_handle *, struct inode *dir, struct inode *child,
179 __u32 mode, const char *name, int namelen,
180 struct ptlrpc_request **);
181 int mdc_link(struct lustre_handle *conn,
182 struct dentry *src, struct inode *dir, const char *name,
183 int namelen, struct ptlrpc_request **);
184 int mdc_rename(struct lustre_handle *conn,
185 struct inode *src, struct inode *tgt, const char *old,
186 int oldlen, const char *new, int newlen,
187 struct ptlrpc_request **);
188 int mdc_create_client(obd_uuid_t uuid, struct ptlrpc_client *cl);
190 /* Store the generation of a newly-created inode in |req| for replay. */
191 void mdc_store_inode_generation(struct ptlrpc_request *req, int reqoff,
194 extern int mds_client_add(struct mds_export_data *med, int cl_off);
195 extern int mds_client_free(struct obd_export *exp);
198 struct mds_fs_operations {
199 struct module *fs_owner;
200 void *(* fs_start)(struct inode *inode, int op);
201 int (* fs_commit)(struct inode *inode, void *handle);
202 int (* fs_setattr)(struct dentry *dentry, void *handle,
203 struct iattr *iattr);
204 int (* fs_set_md)(struct inode *inode, void *handle,
205 struct lov_mds_md *md);
206 int (* fs_get_md)(struct inode *inode,
207 struct lov_mds_md *md);
208 ssize_t (* fs_readpage)(struct file *file, char *buf, size_t count,
210 void (* fs_delete_inode)(struct inode *inode);
211 void (* cl_delete_inode)(struct inode *inode);
212 int (* fs_journal_data)(struct file *file);
213 int (* fs_set_last_rcvd)(struct mds_obd *mds, void *handle);
214 int (* fs_statfs)(struct super_block *sb, struct statfs *sfs);
217 extern int mds_register_fs_type(struct mds_fs_operations *op, const char *name);
218 extern void mds_unregister_fs_type(const char *name);
219 extern int mds_fs_setup(struct obd_device *obddev, struct vfsmount *mnt);
220 extern void mds_fs_cleanup(struct obd_device *obddev);
222 #define MDS_FSOP_UNLINK 1
223 #define MDS_FSOP_RMDIR 2
224 #define MDS_FSOP_RENAME 3
225 #define MDS_FSOP_CREATE 4
226 #define MDS_FSOP_MKDIR 5
227 #define MDS_FSOP_SYMLINK 6
228 #define MDS_FSOP_MKNOD 7
229 #define MDS_FSOP_SETATTR 8
230 #define MDS_FSOP_LINK 9
232 #endif /* __KERNEL__ */
234 /* ioctls for trying requests */
235 #define IOC_REQUEST_TYPE 'f'
236 #define IOC_REQUEST_MIN_NR 30
238 #define IOC_REQUEST_GETATTR _IOWR('f', 30, long)
239 #define IOC_REQUEST_READPAGE _IOWR('f', 31, long)
240 #define IOC_REQUEST_SETATTR _IOWR('f', 32, long)
241 #define IOC_REQUEST_CREATE _IOWR('f', 33, long)
242 #define IOC_REQUEST_OPEN _IOWR('f', 34, long)
243 #define IOC_REQUEST_CLOSE _IOWR('f', 35, long)
244 #define IOC_REQUEST_MAX_NR 35