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,
116 struct inode *inode, const char *name, int namelen);
117 void mds_setattr_pack(struct ptlrpc_request *, int offset, struct inode *,
118 struct iattr *, const char *name, int namelen);
119 void mds_create_pack(struct ptlrpc_request *, int offset, struct inode *,
120 __u32 mode, __u64 id, __u32 uid, __u32 gid, __u64 time,
121 const char *name, int namelen, const char *tgt,
123 void mds_unlink_pack(struct ptlrpc_request *, int offset, struct inode *inode,
124 struct inode *child, const char *name, int namelen);
125 void mds_link_pack(struct ptlrpc_request *, int offset, struct inode *ino,
126 struct inode *dir, const char *name, int namelen);
127 void mds_rename_pack(struct ptlrpc_request *, int offset, struct inode *srcdir,
128 struct inode *tgtdir, const char *name, int namelen,
129 const char *tgt, int tgtlen);
130 void mds_pack_inode2fid(struct ll_fid *fid, struct inode *inode);
131 void mds_pack_inode2body(struct mds_body *body, struct inode *inode);
134 struct dentry *mds_fid2dentry(struct mds_obd *mds, struct ll_fid *fid, struct vfsmount **mnt);
135 int mds_lock_callback(struct lustre_handle *lockh, struct ldlm_lock_desc *desc,
136 void *data, int data_len, struct ptlrpc_request **req);
137 int mds_reint(int offset, struct ptlrpc_request *req);
139 /* mdc/mdc_request.c */
140 static inline struct mdc_obd *mdc_conn2mdc(struct lustre_handle *conn)
142 return &class_conn2obd(conn)->u.mdc;
145 int mdc_enqueue(struct lustre_handle *conn, int lock_type,
146 struct lookup_intent *it, int lock_mode, struct inode *dir,
147 struct dentry *de, struct lustre_handle *h, __u64 id,
148 char *tgt, int tgtlen, void *data, int datalen);
149 int mdc_getstatus(struct lustre_handle *conn,
150 struct ll_fid *rootfid, __u64 *last_committed, __u64 *last_rcvd,
151 __u32 *last_xid, struct ptlrpc_request **);
152 int mdc_getattr(struct lustre_handle *conn,
153 obd_id ino, int type, unsigned long valid, size_t ea_size,
154 struct ptlrpc_request **request);
155 int mdc_statfs(struct lustre_handle *conn,
156 struct statfs *sfs, struct ptlrpc_request **request);
157 int mdc_setattr(struct lustre_handle *conn,
158 struct inode *, struct iattr *iattr, struct ptlrpc_request **);
159 int mdc_open(struct lustre_handle *conn,
160 obd_id ino, int type, int flags, struct obdo *obdo, __u64 cookie,
161 __u64 *fh, struct ptlrpc_request **request);
162 int mdc_close(struct lustre_handle *conn,
163 obd_id ino, int type, __u64 fh, struct ptlrpc_request **req);
164 int mdc_readpage(struct lustre_handle *conn, obd_id ino,
165 int type, __u64 offset, char *addr, struct ptlrpc_request **);
166 int mdc_create(struct lustre_handle *conn,
167 struct inode *dir, const char *name, int namelen,
168 const char *tgt, int tgtlen, int mode, __u32 uid, __u32 gid,
169 __u64 time, __u64 rdev, struct obdo *obdo,
170 struct ptlrpc_request **);
171 int mdc_unlink(struct lustre_handle *conn,
172 struct inode *dir, struct inode *child, const char *name,
173 int namelen, struct ptlrpc_request **);
174 int mdc_link(struct lustre_handle *conn,
175 struct dentry *src, struct inode *dir, const char *name,
176 int namelen, struct ptlrpc_request **);
177 int mdc_rename(struct lustre_handle *conn,
178 struct inode *src, struct inode *tgt, const char *old,
179 int oldlen, const char *new, int newlen,
180 struct ptlrpc_request **);
181 int mdc_create_client(char *uuid, struct ptlrpc_client *cl);
183 extern int mds_client_add(struct mds_obd *mds, struct mds_client_data *mcd,
187 struct mds_fs_operations {
188 void *(* fs_start)(struct inode *inode, int op);
189 int (* fs_commit)(struct inode *inode, void *handle);
190 int (* fs_setattr)(struct dentry *dentry, void *handle,
191 struct iattr *iattr);
192 int (* fs_set_obdo)(struct inode *inode, void *handle,
194 int (* fs_get_obdo)(struct inode *inode, struct obdo *obdo);
195 ssize_t (* fs_readpage)(struct file *file, char *buf, size_t count,
197 void (* fs_delete_inode)(struct inode *inode);
198 void (* cl_delete_inode)(struct inode *inode);
199 int (* fs_journal_data)(struct file *file);
200 int (* fs_set_last_rcvd)(struct mds_obd *mds, void *handle);
201 int (* fs_statfs)(struct super_block *sb, struct statfs *sfs);
204 extern int mds_register_fs_type(struct mds_fs_operations *op, const char *name);
205 extern void mds_unregister_fs_type(const char *name);
206 extern int mds_fs_setup(struct mds_obd *mds, struct vfsmount *mnt);
207 extern void mds_fs_cleanup(struct mds_obd *mds);
209 static inline void *mds_fs_start(struct mds_obd *mds, struct inode *inode,
212 return mds->mds_fsops->fs_start(inode, op);
215 static inline int mds_fs_commit(struct mds_obd *mds, struct inode *inode,
218 return mds->mds_fsops->fs_commit(inode, handle);
221 static inline int mds_fs_setattr(struct mds_obd *mds, struct dentry *dentry,
222 void *handle, struct iattr *iattr)
225 * NOTE: we probably don't need to take i_sem here when changing
226 * ATTR_SIZE because the MDS never needs to truncate a file.
227 * The ext2/ext3 code never truncates a directory, and files
228 * stored on the MDS are entirely sparse (no data blocks).
229 * If we do need to get it, we can do it here.
231 return mds->mds_fsops->fs_setattr(dentry, handle, iattr);
234 static inline int mds_fs_set_obdo(struct mds_obd *mds, struct inode *inode,
235 void *handle, struct obdo *obdo)
237 return mds->mds_fsops->fs_set_obdo(inode, handle, obdo);
240 static inline int mds_fs_get_obdo(struct mds_obd *mds, struct inode *inode,
243 return mds->mds_fsops->fs_get_obdo(inode, obdo);
246 static inline ssize_t mds_fs_readpage(struct mds_obd *mds, struct file *file,
247 char *buf, size_t count, loff_t *offset)
249 return mds->mds_fsops->fs_readpage(file, buf, count, offset);
252 /* Set up callback to update mds->mds_last_committed with the current
253 * value of mds->mds_last_recieved when this transaction is on disk.
255 static inline int mds_fs_set_last_rcvd(struct mds_obd *mds, void *handle)
257 return mds->mds_fsops->fs_set_last_rcvd(mds, handle);
260 /* Enable data journaling on the given file */
261 static inline ssize_t mds_fs_journal_data(struct mds_obd *mds,
264 return mds->mds_fsops->fs_journal_data(file);
267 static inline int mds_fs_statfs(struct mds_obd *mds, struct statfs *sfs)
269 if (mds->mds_fsops->fs_statfs)
270 return mds->mds_fsops->fs_statfs(mds->mds_sb, sfs);
272 return vfs_statfs(mds->mds_sb, sfs);
275 #define MDS_FSOP_UNLINK 1
276 #define MDS_FSOP_RMDIR 2
277 #define MDS_FSOP_RENAME 3
278 #define MDS_FSOP_CREATE 4
279 #define MDS_FSOP_MKDIR 5
280 #define MDS_FSOP_SYMLINK 6
281 #define MDS_FSOP_MKNOD 7
282 #define MDS_FSOP_SETATTR 8
283 #define MDS_FSOP_LINK 9
285 #endif /* __KERNEL__ */
287 /* ioctls for trying requests */
288 #define IOC_REQUEST_TYPE 'f'
289 #define IOC_REQUEST_MIN_NR 30
291 #define IOC_REQUEST_GETATTR _IOWR('f', 30, long)
292 #define IOC_REQUEST_READPAGE _IOWR('f', 31, long)
293 #define IOC_REQUEST_SETATTR _IOWR('f', 32, long)
294 #define IOC_REQUEST_CREATE _IOWR('f', 33, long)
295 #define IOC_REQUEST_OPEN _IOWR('f', 34, long)
296 #define IOC_REQUEST_CLOSE _IOWR('f', 35, long)
297 #define IOC_REQUEST_MAX_NR 35