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/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, const char *name, int namelen);
118 void mds_link_pack(struct ptlrpc_request *, int offset, struct inode *ino,
119 struct inode *dir, const char *name, int namelen);
120 void mds_rename_pack(struct ptlrpc_request *, int offset, struct inode *srcdir,
121 struct inode *tgtdir, const char *name, int namelen,
122 const char *tgt, int tgtlen);
123 void mds_pack_inode2fid(struct ll_fid *fid, struct inode *inode);
124 void mds_pack_inode2body(struct mds_body *body, struct inode *inode);
127 struct dentry *mds_name2locked_dentry(struct obd_device *obd, struct dentry *dir,
128 struct vfsmount **mnt, char *name,
129 int namelen, int lock_mode,
130 struct lustre_handle *lockh,
132 struct dentry *mds_fid2locked_dentry(struct obd_device *obd, struct ll_fid *fid,
133 struct vfsmount **mnt, int lock_mode,
134 struct lustre_handle *lockh);
135 struct dentry *mds_fid2dentry(struct mds_obd *mds, struct ll_fid *fid,
136 struct vfsmount **mnt);
137 int mds_reint(int offset, struct ptlrpc_request *req);
139 /* mdc/mdc_request.c */
140 extern int mdc_con2cl(struct lustre_handle *conn, struct ptlrpc_client **cl,
141 struct ptlrpc_connection **connection,
142 struct lustre_handle **rconn);
144 int mdc_enqueue(struct lustre_handle *conn, int lock_type,
145 struct lookup_intent *it, int lock_mode, struct inode *dir,
146 struct dentry *de, struct lustre_handle *h, __u64 id,
147 char *tgt, int tgtlen, void *data, int datalen);
148 int mdc_getlovinfo(struct obd_device *obd, struct lustre_handle *mdc_connh,
149 uuid_t **uuids, struct ptlrpc_request **request);
150 int mdc_getstatus(struct lustre_handle *conn,
151 struct ll_fid *rootfid, __u64 *last_committed, __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 lov_stripe_md *md, __u64 cookie, __u64 *fh, struct ptlrpc_request **request);
161 int mdc_close(struct lustre_handle *conn,
162 obd_id ino, int type, __u64 fh, struct ptlrpc_request **req);
163 int mdc_readpage(struct lustre_handle *conn, obd_id ino,
164 int type, __u64 offset, char *addr, struct ptlrpc_request **);
165 int mdc_create(struct lustre_handle *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 lov_stripe_md *md,
169 struct ptlrpc_request **);
170 int mdc_unlink(struct lustre_handle *conn,
171 struct inode *dir, struct inode *child, const char *name,
172 int namelen, struct ptlrpc_request **);
173 int mdc_link(struct lustre_handle *conn,
174 struct dentry *src, struct inode *dir, const char *name,
175 int namelen, struct ptlrpc_request **);
176 int mdc_rename(struct lustre_handle *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_export_data *med, int cl_off);
183 extern int mds_client_free(struct mds_export_data *med);
186 struct mds_fs_operations {
187 struct module *fs_owner;
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_md)(struct inode *inode, void *handle,
193 struct lov_stripe_md *md);
194 int (* fs_get_md)(struct inode *inode,
195 struct lov_stripe_md *md);
196 ssize_t (* fs_readpage)(struct file *file, char *buf, size_t count,
198 void (* fs_delete_inode)(struct inode *inode);
199 void (* cl_delete_inode)(struct inode *inode);
200 int (* fs_journal_data)(struct file *file);
201 int (* fs_set_last_rcvd)(struct mds_obd *mds, void *handle);
202 int (* fs_statfs)(struct super_block *sb, struct statfs *sfs);
205 extern int mds_register_fs_type(struct mds_fs_operations *op, const char *name);
206 extern void mds_unregister_fs_type(const char *name);
207 extern int mds_fs_setup(struct obd_device *obddev, struct vfsmount *mnt);
208 extern void mds_fs_cleanup(struct obd_device *obddev);
210 static inline void *mds_fs_start(struct mds_obd *mds, struct inode *inode,
213 return mds->mds_fsops->fs_start(inode, op);
216 static inline int mds_fs_commit(struct mds_obd *mds, struct inode *inode,
219 return mds->mds_fsops->fs_commit(inode, handle);
222 static inline int mds_fs_setattr(struct mds_obd *mds, struct dentry *dentry,
223 void *handle, struct iattr *iattr)
226 * NOTE: we probably don't need to take i_sem here when changing
227 * ATTR_SIZE because the MDS never needs to truncate a file.
228 * The ext2/ext3 code never truncates a directory, and files
229 * stored on the MDS are entirely sparse (no data blocks).
230 * If we do need to get it, we can do it here.
232 return mds->mds_fsops->fs_setattr(dentry, handle, iattr);
235 static inline int mds_fs_set_md(struct mds_obd *mds, struct inode *inode,
236 void *handle, struct lov_stripe_md *md)
238 return mds->mds_fsops->fs_set_md(inode, handle, md);
241 static inline int mds_fs_get_md(struct mds_obd *mds, struct inode *inode,
242 struct lov_stripe_md *md)
244 return mds->mds_fsops->fs_get_md(inode, md);
247 static inline ssize_t mds_fs_readpage(struct mds_obd *mds, struct file *file,
248 char *buf, size_t count, loff_t *offset)
250 return mds->mds_fsops->fs_readpage(file, buf, count, offset);
253 /* Set up callback to update mds->mds_last_committed with the current
254 * value of mds->mds_last_recieved when this transaction is on disk.
256 static inline int mds_fs_set_last_rcvd(struct mds_obd *mds, void *handle)
258 return mds->mds_fsops->fs_set_last_rcvd(mds, handle);
261 /* Enable data journaling on the given file */
262 static inline ssize_t mds_fs_journal_data(struct mds_obd *mds,
265 return mds->mds_fsops->fs_journal_data(file);
268 static inline int mds_fs_statfs(struct mds_obd *mds, struct statfs *sfs)
270 if (mds->mds_fsops->fs_statfs)
271 return mds->mds_fsops->fs_statfs(mds->mds_sb, sfs);
273 return vfs_statfs(mds->mds_sb, sfs);
276 #define MDS_FSOP_UNLINK 1
277 #define MDS_FSOP_RMDIR 2
278 #define MDS_FSOP_RENAME 3
279 #define MDS_FSOP_CREATE 4
280 #define MDS_FSOP_MKDIR 5
281 #define MDS_FSOP_SYMLINK 6
282 #define MDS_FSOP_MKNOD 7
283 #define MDS_FSOP_SETATTR 8
284 #define MDS_FSOP_LINK 9
286 #endif /* __KERNEL__ */
288 /* ioctls for trying requests */
289 #define IOC_REQUEST_TYPE 'f'
290 #define IOC_REQUEST_MIN_NR 30
292 #define IOC_REQUEST_GETATTR _IOWR('f', 30, long)
293 #define IOC_REQUEST_READPAGE _IOWR('f', 31, long)
294 #define IOC_REQUEST_SETATTR _IOWR('f', 32, long)
295 #define IOC_REQUEST_CREATE _IOWR('f', 33, long)
296 #define IOC_REQUEST_OPEN _IOWR('f', 34, long)
297 #define IOC_REQUEST_CLOSE _IOWR('f', 35, long)
298 #define IOC_REQUEST_MAX_NR 35