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.
31 #include <linux/obd_class.h>
32 #include <linux/lustre_idl.h>
33 #include <linux/lustre_net.h>
34 #include <linux/lustre_dlm.h>
35 #include <linux/obd_lov.h> /* for lov_md */
37 #define LUSTRE_MDS_NAME "mds"
38 #define LUSTRE_MDC_NAME "mdc"
40 struct mds_update_record {
42 struct ll_fid *ur_fid1;
43 struct ll_fid *ur_fid2;
48 struct iattr ur_iattr;
58 struct lov_md mo_lov_md;
61 #define MDS_LR_CLIENT 8192
62 #define MDS_LR_SIZE 128
64 #define MDS_CLIENT_SLOTS 17
66 #define MDS_MOUNT_RECOV 2
68 /* Data stored per server at the head of the last_rcvd file. In le32 order. */
69 struct mds_server_data {
70 __u8 msd_uuid[37]; /* server UUID */
71 __u8 uuid_padding[3]; /* unused */
72 __u64 msd_last_rcvd; /* last completed transaction ID */
73 __u64 msd_mount_count; /* MDS incarnation number */
74 __u8 padding[512 - 56];
77 /* Data stored per client in the last_rcvd file. In le32 order. */
78 struct mds_client_data {
79 __u8 mcd_uuid[37]; /* client UUID */
80 __u8 uuid_padding[3]; /* unused */
81 __u64 mcd_last_rcvd; /* last completed transaction ID */
82 __u64 mcd_mount_count; /* MDS incarnation number */
83 __u32 mcd_last_xid; /* client RPC xid for the last transaction */
84 __u8 padding[MDS_LR_SIZE - 60];
87 /* In-memory access to client data from MDS struct */
88 struct mds_client_info {
89 struct list_head mci_list;
90 struct list_head mci_open_head;
91 struct mds_client_data *mci_mcd;
95 /* file data for open files on MDS */
96 struct mds_file_data {
97 struct list_head mfd_list;
98 struct file * mfd_file;
100 __u32 mfd_clientcookie;
103 /* mds/mds_reint.c */
104 int mds_reint_rec(struct mds_update_record *r, int offset,
105 struct ptlrpc_request *req);
106 struct mds_client_info *mds_uuid_to_mci(struct mds_obd *mds, __u8 *uuid);
108 /* lib/mds_updates.c */
109 void mds_unpack_body(struct mds_body *b);
110 void mds_pack_req_body(struct ptlrpc_request *);
111 void mds_pack_rep_body(struct ptlrpc_request *);
112 int mds_update_unpack(struct ptlrpc_request *, int offset,
113 struct mds_update_record *);
115 void mds_getattr_pack(struct ptlrpc_request *req, int offset,
117 const char *name, int namelen);
118 void mds_setattr_pack(struct ptlrpc_request *, int offset, struct inode *,
119 struct iattr *, const char *name, int namelen);
120 void mds_create_pack(struct ptlrpc_request *, int offset, struct inode *,
121 __u32 mode, __u64 id, __u32 uid, __u32 gid, __u64 time,
122 const char *name, int namelen, const char *tgt,
124 void mds_unlink_pack(struct ptlrpc_request *, int offset, struct inode *inode,
125 struct inode *child, const char *name, int namelen);
126 void mds_link_pack(struct ptlrpc_request *, int offset, struct inode *ino,
127 struct inode *dir, const char *name, int namelen);
128 void mds_rename_pack(struct ptlrpc_request *, int offset, struct inode *srcdir,
129 struct inode *tgtdir, const char *name, int namelen,
130 const char *tgt, int tgtlen);
131 void mds_pack_inode2fid(struct ll_fid *fid, struct inode *inode);
132 void mds_pack_inode2body(struct mds_body *body, struct inode *inode);
135 struct dentry *mds_fid2dentry(struct mds_obd *mds, struct ll_fid *fid, struct vfsmount **mnt);
136 int mds_lock_callback(struct ldlm_lock *lock, struct ldlm_lock *new,
137 void *data, int data_len);
138 int mds_reint(int offset, struct ptlrpc_request *req);
140 /* mdc/mdc_request.c */
141 static inline struct mdc_obd *mdc_conn2mdc(struct obd_conn *conn)
143 return &conn->oc_dev->u.mdc;
146 int mdc_enqueue(struct obd_conn *conn, int lock_type, struct lookup_intent *it,
147 int lock_mode, struct inode *dir, struct dentry *de,
148 struct lustre_handle *h, __u64 id, char *tgt, int tgtlen,
149 void *data, int datalen);
150 int mdc_getstatus(struct obd_conn *conn,
151 struct ll_fid *rootfid, __u64 *last_committed, __u64 *last_rcvd,
152 __u32 *last_xid, struct ptlrpc_request **);
153 int mdc_getattr(struct obd_conn *conn,
154 ino_t ino, int type, unsigned long valid, size_t ea_size,
155 struct ptlrpc_request **request);
156 int mdc_setattr(struct obd_conn *conn,
157 struct inode *, struct iattr *iattr, struct ptlrpc_request **);
158 int mdc_open(struct obd_conn *conn,
159 ino_t ino, int type, int flags, struct obdo *obdo, __u64 cookie,
160 __u64 *fh, struct ptlrpc_request **request);
161 int mdc_close(struct obd_conn *conn,
162 ino_t ino, int type, __u64 fh, struct ptlrpc_request **req);
163 int mdc_readpage(struct obd_conn *conn, ino_t ino,
164 int type, __u64 offset, char *addr, struct ptlrpc_request **);
165 int mdc_create(struct obd_conn *conn,
166 struct inode *dir, const char *name, int namelen,
167 const char *tgt, int tgtlen, int mode, __u32 uid, __u32 gid,
168 __u64 time, __u64 rdev, struct obdo *obdo,
169 struct ptlrpc_request **);
170 int mdc_unlink(struct obd_conn *conn,
171 struct inode *dir, struct inode *child, const char *name,
172 int namelen, struct ptlrpc_request **);
173 int mdc_link(struct obd_conn *conn,
174 struct dentry *src, struct inode *dir, const char *name,
175 int namelen, struct ptlrpc_request **);
176 int mdc_rename(struct obd_conn *conn,
177 struct inode *src, struct inode *tgt, const char *old,
178 int oldlen, const char *new, int newlen,
179 struct ptlrpc_request **);
180 int mdc_create_client(char *uuid, struct ptlrpc_client *cl);
182 extern int mds_client_add(struct mds_obd *mds, struct mds_client_data *mcd,
186 struct mds_fs_operations {
187 void *(* fs_start)(struct inode *inode, int op);
188 int (* fs_commit)(struct inode *inode, void *handle);
189 int (* fs_setattr)(struct dentry *dentry, void *handle,
190 struct iattr *iattr);
191 int (* fs_set_obdo)(struct inode *inode, void *handle,
193 int (* fs_get_obdo)(struct inode *inode, struct obdo *obdo);
194 ssize_t (* fs_readpage)(struct file *file, char *buf, size_t count,
196 void (* fs_delete_inode)(struct inode *inode);
197 void (* cl_delete_inode)(struct inode *inode);
198 int (* fs_journal_data)(struct file *file);
199 int (* fs_set_last_rcvd)(struct mds_obd *mds, void *handle);
202 extern int mds_register_fs_type(struct mds_fs_operations *op, const char *name);
203 extern void mds_unregister_fs_type(const char *name);
204 extern int mds_fs_setup(struct mds_obd *mds, struct vfsmount *mnt);
205 extern void mds_fs_cleanup(struct mds_obd *mds);
207 static inline void *mds_fs_start(struct mds_obd *mds, struct inode *inode,
210 return mds->mds_fsops->fs_start(inode, op);
213 static inline int mds_fs_commit(struct mds_obd *mds, struct inode *inode,
216 return mds->mds_fsops->fs_commit(inode, handle);
219 static inline int mds_fs_setattr(struct mds_obd *mds, struct dentry *dentry,
220 void *handle, struct iattr *iattr)
223 * NOTE: we probably don't need to take i_sem here when changing
224 * ATTR_SIZE because the MDS never needs to truncate a file.
225 * The ext2/ext3 code never truncates a directory, and files
226 * stored on the MDS are entirely sparse (no data blocks).
227 * If we do need to get it, we can do it here.
229 return mds->mds_fsops->fs_setattr(dentry, handle, iattr);
232 static inline int mds_fs_set_obdo(struct mds_obd *mds, struct inode *inode,
233 void *handle, struct obdo *obdo)
235 return mds->mds_fsops->fs_set_obdo(inode, handle, obdo);
238 static inline int mds_fs_get_obdo(struct mds_obd *mds, struct inode *inode,
241 return mds->mds_fsops->fs_get_obdo(inode, obdo);
244 static inline ssize_t mds_fs_readpage(struct mds_obd *mds, struct file *file,
245 char *buf, size_t count, loff_t *offset)
247 return mds->mds_fsops->fs_readpage(file, buf, count, offset);
250 /* Set up callback to update mds->mds_last_committed with the current
251 * value of mds->mds_last_recieved when this transaction is on disk.
253 static inline int mds_fs_set_last_rcvd(struct mds_obd *mds, void *handle)
255 return mds->mds_fsops->fs_set_last_rcvd(mds, handle);
258 /* Enable data journaling on the given file */
259 static inline ssize_t mds_fs_journal_data(struct mds_obd *mds,
262 return mds->mds_fsops->fs_journal_data(file);
265 #define MDS_FSOP_UNLINK 1
266 #define MDS_FSOP_RMDIR 2
267 #define MDS_FSOP_RENAME 3
268 #define MDS_FSOP_CREATE 4
269 #define MDS_FSOP_MKDIR 5
270 #define MDS_FSOP_SYMLINK 6
271 #define MDS_FSOP_MKNOD 7
272 #define MDS_FSOP_SETATTR 8
273 #define MDS_FSOP_LINK 9
275 #endif /* __KERNEL__ */
277 /* ioctls for trying requests */
278 #define IOC_REQUEST_TYPE 'f'
279 #define IOC_REQUEST_MIN_NR 30
281 #define IOC_REQUEST_GETATTR _IOWR('f', 30, long)
282 #define IOC_REQUEST_READPAGE _IOWR('f', 31, long)
283 #define IOC_REQUEST_SETATTR _IOWR('f', 32, long)
284 #define IOC_REQUEST_CREATE _IOWR('f', 33, long)
285 #define IOC_REQUEST_OPEN _IOWR('f', 34, long)
286 #define IOC_REQUEST_CLOSE _IOWR('f', 35, long)
287 #define IOC_REQUEST_MAX_NR 35