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.
31 #include <linux/lustre_idl.h>
32 #include <linux/lustre_net.h>
34 struct ldlm_lock_desc;
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;
56 #define MDS_LR_CLIENT 8192
57 #define MDS_LR_SIZE 128
59 #define MDS_CLIENT_SLOTS 17
61 #define MDS_MOUNT_RECOV 2
63 /* Data stored per server at the head of the last_rcvd file. In le32 order. */
64 struct mds_server_data {
65 __u8 msd_uuid[37]; /* server UUID */
66 __u8 uuid_padding[3]; /* unused */
67 __u64 msd_last_rcvd; /* last completed transaction ID */
68 __u64 msd_mount_count; /* MDS incarnation number */
69 __u8 padding[512 - 56];
72 /* Data stored per client in the last_rcvd file. In le32 order. */
73 struct mds_client_data {
74 __u8 mcd_uuid[37]; /* client UUID */
75 __u8 uuid_padding[3]; /* unused */
76 __u64 mcd_last_rcvd; /* last completed transaction ID */
77 __u64 mcd_mount_count; /* MDS incarnation number */
78 __u32 mcd_last_xid; /* client RPC xid for the last transaction */
79 __u8 padding[MDS_LR_SIZE - 60];
82 /* In-memory access to client data from MDS struct */
83 struct mds_export_data {
84 struct list_head med_open_head;
85 struct mds_client_data *med_mcd;
89 /* file data for open files on MDS */
90 struct mds_file_data {
91 struct list_head mfd_list;
92 struct file *mfd_file;
94 __u32 mfd_clientcookie;
98 int mds_reint_rec(struct mds_update_record *r, int offset,
99 struct ptlrpc_request *req);
101 /* lib/mds_updates.c */
102 void mds_unpack_body(struct mds_body *b);
103 void mds_pack_req_body(struct ptlrpc_request *);
104 void mds_pack_rep_body(struct ptlrpc_request *);
105 int mds_update_unpack(struct ptlrpc_request *, int offset,
106 struct mds_update_record *);
108 void mds_getattr_pack(struct ptlrpc_request *req, int offset,
109 struct inode *inode, const char *name, int namelen);
110 void mds_setattr_pack(struct ptlrpc_request *, int offset, struct inode *,
111 struct iattr *, const char *name, int namelen);
112 void mds_create_pack(struct ptlrpc_request *, int offset, struct inode *,
113 __u32 mode, __u64 id, __u32 uid, __u32 gid, __u64 time,
114 const char *name, int namelen, const char *tgt,
116 void mds_unlink_pack(struct ptlrpc_request *, int offset, struct inode *inode,
117 struct inode *child, __u32 mode, const char *name,
119 void mds_link_pack(struct ptlrpc_request *, int offset, struct inode *ino,
120 struct inode *dir, const char *name, int namelen);
121 void mds_rename_pack(struct ptlrpc_request *, int offset, struct inode *srcdir,
122 struct inode *tgtdir, const char *name, int namelen,
123 const char *tgt, int tgtlen);
124 void mds_pack_inode2fid(struct ll_fid *fid, struct inode *inode);
125 void mds_pack_inode2body(struct mds_body *body, struct inode *inode);
128 struct dentry *mds_name2locked_dentry(struct obd_device *, struct dentry *dir,
129 struct vfsmount **mnt, char *name,
130 int namelen, int lock_mode,
131 struct lustre_handle *lockh,
133 struct dentry *mds_fid2locked_dentry(struct obd_device *obd, struct ll_fid *fid,
134 struct vfsmount **mnt, int lock_mode,
135 struct lustre_handle *lockh);
136 struct dentry *mds_fid2dentry(struct mds_obd *mds, struct ll_fid *fid,
137 struct vfsmount **mnt);
138 int mds_reint(int offset, struct ptlrpc_request *req);
140 /* mdc/mdc_request.c */
141 extern int mdc_con2cl(struct lustre_handle *conn, struct ptlrpc_client **cl,
142 struct ptlrpc_connection **connection,
143 struct lustre_handle **rconn);
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_getlovinfo(struct obd_device *obd, struct lustre_handle *mdc_connh,
150 uuid_t **uuids, struct ptlrpc_request **request);
151 int mdc_getstatus(struct lustre_handle *conn,
152 struct ll_fid *rootfid, __u64 *last_committed,
153 __u32 *last_xid, struct ptlrpc_request **);
154 int mdc_getattr(struct lustre_handle *conn,
155 obd_id ino, int type, unsigned long valid, size_t ea_size,
156 struct ptlrpc_request **request);
157 int mdc_statfs(struct lustre_handle *conn,
158 struct statfs *sfs, struct ptlrpc_request **request);
159 int mdc_setattr(struct lustre_handle *conn,
160 struct inode *, struct iattr *iattr, struct ptlrpc_request **);
161 int mdc_open(struct lustre_handle *conn, obd_id ino, int type, int flags,
162 struct lov_stripe_md *, __u64 cookie, __u64 *fh,
163 struct ptlrpc_request **);
164 int mdc_close(struct lustre_handle *conn,
165 obd_id ino, int type, __u64 fh, struct ptlrpc_request **req);
166 int mdc_readpage(struct lustre_handle *conn, obd_id ino,
167 int type, __u64 offset, char *addr, struct ptlrpc_request **);
168 int mdc_create(struct lustre_handle *conn,
169 struct inode *dir, const char *name, int namelen,
170 const char *tgt, int tgtlen, int mode, __u32 uid, __u32 gid,
171 __u64 time, __u64 rdev, struct lov_stripe_md *md,
172 struct ptlrpc_request **);
173 int mdc_unlink(struct lustre_handle *, struct inode *dir, struct inode *child,
174 __u32 mode, const char *name, int namelen,
175 struct ptlrpc_request **);
176 int mdc_link(struct lustre_handle *conn,
177 struct dentry *src, struct inode *dir, const char *name,
178 int namelen, struct ptlrpc_request **);
179 int mdc_rename(struct lustre_handle *conn,
180 struct inode *src, struct inode *tgt, const char *old,
181 int oldlen, const char *new, int newlen,
182 struct ptlrpc_request **);
183 int mdc_create_client(char *uuid, struct ptlrpc_client *cl);
185 extern int mds_client_add(struct mds_export_data *med, int cl_off);
186 extern int mds_client_free(struct mds_export_data *med);
189 struct mds_fs_operations {
190 struct module *fs_owner;
191 void *(* fs_start)(struct inode *inode, int op);
192 int (* fs_commit)(struct inode *inode, void *handle);
193 int (* fs_setattr)(struct dentry *dentry, void *handle,
194 struct iattr *iattr);
195 int (* fs_set_md)(struct inode *inode, void *handle,
196 struct lov_mds_md *md);
197 int (* fs_get_md)(struct inode *inode,
198 struct lov_mds_md *md);
199 ssize_t (* fs_readpage)(struct file *file, char *buf, size_t count,
201 void (* fs_delete_inode)(struct inode *inode);
202 void (* cl_delete_inode)(struct inode *inode);
203 int (* fs_journal_data)(struct file *file);
204 int (* fs_set_last_rcvd)(struct mds_obd *mds, void *handle);
205 int (* fs_statfs)(struct super_block *sb, struct statfs *sfs);
208 extern int mds_register_fs_type(struct mds_fs_operations *op, const char *name);
209 extern void mds_unregister_fs_type(const char *name);
210 extern int mds_fs_setup(struct obd_device *obddev, struct vfsmount *mnt);
211 extern void mds_fs_cleanup(struct obd_device *obddev);
213 static inline void *mds_fs_start(struct mds_obd *mds, struct inode *inode,
216 return mds->mds_fsops->fs_start(inode, op);
219 static inline int mds_fs_commit(struct mds_obd *mds, struct inode *inode,
222 return mds->mds_fsops->fs_commit(inode, handle);
225 static inline int mds_fs_setattr(struct mds_obd *mds, struct dentry *dentry,
226 void *handle, struct iattr *iattr)
229 * NOTE: we probably don't need to take i_sem here when changing
230 * ATTR_SIZE because the MDS never needs to truncate a file.
231 * The ext2/ext3 code never truncates a directory, and files
232 * stored on the MDS are entirely sparse (no data blocks).
233 * If we do need to get it, we can do it here.
235 return mds->mds_fsops->fs_setattr(dentry, handle, iattr);
238 static inline int mds_fs_set_md(struct mds_obd *mds, struct inode *inode,
239 void *handle, struct lov_mds_md *md)
241 return mds->mds_fsops->fs_set_md(inode, handle, md);
244 static inline int mds_fs_get_md(struct mds_obd *mds, struct inode *inode,
245 struct lov_mds_md *md)
247 return mds->mds_fsops->fs_get_md(inode, md);
250 static inline ssize_t mds_fs_readpage(struct mds_obd *mds, struct file *file,
251 char *buf, size_t count, loff_t *offset)
253 return mds->mds_fsops->fs_readpage(file, buf, count, offset);
256 /* Set up callback to update mds->mds_last_committed with the current
257 * value of mds->mds_last_recieved when this transaction is on disk.
259 static inline int mds_fs_set_last_rcvd(struct mds_obd *mds, void *handle)
261 return mds->mds_fsops->fs_set_last_rcvd(mds, handle);
264 /* Enable data journaling on the given file */
265 static inline ssize_t mds_fs_journal_data(struct mds_obd *mds,
268 return mds->mds_fsops->fs_journal_data(file);
271 static inline int mds_fs_statfs(struct mds_obd *mds, struct statfs *sfs)
273 if (mds->mds_fsops->fs_statfs)
274 return mds->mds_fsops->fs_statfs(mds->mds_sb, sfs);
276 return vfs_statfs(mds->mds_sb, sfs);
279 #define MDS_FSOP_UNLINK 1
280 #define MDS_FSOP_RMDIR 2
281 #define MDS_FSOP_RENAME 3
282 #define MDS_FSOP_CREATE 4
283 #define MDS_FSOP_MKDIR 5
284 #define MDS_FSOP_SYMLINK 6
285 #define MDS_FSOP_MKNOD 7
286 #define MDS_FSOP_SETATTR 8
287 #define MDS_FSOP_LINK 9
289 #endif /* __KERNEL__ */
291 /* ioctls for trying requests */
292 #define IOC_REQUEST_TYPE 'f'
293 #define IOC_REQUEST_MIN_NR 30
295 #define IOC_REQUEST_GETATTR _IOWR('f', 30, long)
296 #define IOC_REQUEST_READPAGE _IOWR('f', 31, long)
297 #define IOC_REQUEST_SETATTR _IOWR('f', 32, long)
298 #define IOC_REQUEST_CREATE _IOWR('f', 33, long)
299 #define IOC_REQUEST_OPEN _IOWR('f', 34, long)
300 #define IOC_REQUEST_CLOSE _IOWR('f', 35, long)
301 #define IOC_REQUEST_MAX_NR 35