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;
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_client_info {
84 struct list_head mci_list;
85 struct list_head mci_open_head;
86 struct mds_client_data *mci_mcd;
90 /* file data for open files on MDS */
91 struct mds_file_data {
92 struct list_head mfd_list;
93 struct file * mfd_file;
95 __u32 mfd_clientcookie;
99 int mds_reint_rec(struct mds_update_record *r, int offset,
100 struct ptlrpc_request *req);
101 struct mds_client_info *mds_uuid_to_mci(struct mds_obd *mds, __u8 *uuid);
103 /* lib/mds_updates.c */
104 void mds_unpack_body(struct mds_body *b);
105 void mds_pack_req_body(struct ptlrpc_request *);
106 void mds_pack_rep_body(struct ptlrpc_request *);
107 int mds_update_unpack(struct ptlrpc_request *, int offset,
108 struct mds_update_record *);
110 void mds_getattr_pack(struct ptlrpc_request *req, int offset,
111 struct inode *inode, const char *name, int namelen);
112 void mds_setattr_pack(struct ptlrpc_request *, int offset, struct inode *,
113 struct iattr *, const char *name, int namelen);
114 void mds_create_pack(struct ptlrpc_request *, int offset, struct inode *,
115 __u32 mode, __u64 id, __u32 uid, __u32 gid, __u64 time,
116 const char *name, int namelen, const char *tgt,
118 void mds_unlink_pack(struct ptlrpc_request *, int offset, struct inode *inode,
119 struct inode *child, const char *name, int namelen);
120 void mds_link_pack(struct ptlrpc_request *, int offset, struct inode *ino,
121 struct inode *dir, const char *name, int namelen);
122 void mds_rename_pack(struct ptlrpc_request *, int offset, struct inode *srcdir,
123 struct inode *tgtdir, const char *name, int namelen,
124 const char *tgt, int tgtlen);
125 void mds_pack_inode2fid(struct ll_fid *fid, struct inode *inode);
126 void mds_pack_inode2body(struct mds_body *body, struct inode *inode);
129 struct dentry *mds_name2locked_dentry(struct mds_obd *mds, struct dentry *dir,
130 struct vfsmount **mnt, char *name,
131 int namelen, int lock_mode,
132 struct lustre_handle *lockh,
134 struct dentry *mds_fid2locked_dentry(struct mds_obd *mds, struct ll_fid *fid,
135 struct vfsmount **mnt, int lock_mode,
136 struct lustre_handle *lockh);
137 struct dentry *mds_fid2dentry(struct mds_obd *mds, struct ll_fid *fid,
138 struct vfsmount **mnt);
139 int mds_lock_callback(struct lustre_handle *lockh, struct ldlm_lock_desc *desc,
140 void *data, int data_len, struct ptlrpc_request **req);
141 int mds_reint(int offset, struct ptlrpc_request *req);
143 /* mdc/mdc_request.c */
144 extern int mdc_con2cl(struct lustre_handle *conn, struct ptlrpc_client **cl,
145 struct ptlrpc_connection **connection,
146 struct lustre_handle **rconn);
148 int mdc_enqueue(struct lustre_handle *conn, int lock_type,
149 struct lookup_intent *it, int lock_mode, struct inode *dir,
150 struct dentry *de, struct lustre_handle *h, __u64 id,
151 char *tgt, int tgtlen, void *data, int datalen);
152 int mdc_getlovinfo(struct obd_device *obd, struct lustre_handle *mdc_connh,
153 uuid_t **uuids, struct ptlrpc_request **request);
154 int mdc_getstatus(struct lustre_handle *conn,
155 struct ll_fid *rootfid, __u64 *last_committed, __u64 *last_rcvd,
156 __u32 *last_xid, struct ptlrpc_request **);
157 int mdc_getattr(struct lustre_handle *conn,
158 obd_id ino, int type, unsigned long valid, size_t ea_size,
159 struct ptlrpc_request **request);
160 int mdc_statfs(struct lustre_handle *conn,
161 struct statfs *sfs, struct ptlrpc_request **request);
162 int mdc_setattr(struct lustre_handle *conn,
163 struct inode *, struct iattr *iattr, struct ptlrpc_request **);
164 int mdc_open(struct lustre_handle *conn,
165 obd_id ino, int type, int flags, struct lov_stripe_md *md, __u64 cookie, __u64 *fh, struct ptlrpc_request **request);
166 int mdc_close(struct lustre_handle *conn,
167 obd_id ino, int type, __u64 fh, struct ptlrpc_request **req);
168 int mdc_readpage(struct lustre_handle *conn, obd_id ino,
169 int type, __u64 offset, char *addr, struct ptlrpc_request **);
170 int mdc_create(struct lustre_handle *conn,
171 struct inode *dir, const char *name, int namelen,
172 const char *tgt, int tgtlen, int mode, __u32 uid, __u32 gid,
173 __u64 time, __u64 rdev, struct lov_stripe_md *md,
174 struct ptlrpc_request **);
175 int mdc_unlink(struct lustre_handle *conn,
176 struct inode *dir, struct inode *child, const char *name,
177 int namelen, struct ptlrpc_request **);
178 int mdc_link(struct lustre_handle *conn,
179 struct dentry *src, struct inode *dir, const char *name,
180 int namelen, struct ptlrpc_request **);
181 int mdc_rename(struct lustre_handle *conn,
182 struct inode *src, struct inode *tgt, const char *old,
183 int oldlen, const char *new, int newlen,
184 struct ptlrpc_request **);
185 int mdc_create_client(char *uuid, struct ptlrpc_client *cl);
187 extern int mds_client_add(struct mds_obd *mds, struct mds_client_data *mcd,
191 struct mds_fs_operations {
192 struct module *fs_owner;
193 void *(* fs_start)(struct inode *inode, int op);
194 int (* fs_commit)(struct inode *inode, void *handle);
195 int (* fs_setattr)(struct dentry *dentry, void *handle,
196 struct iattr *iattr);
197 int (* fs_set_md)(struct inode *inode, void *handle,
198 struct lov_stripe_md *md);
199 int (* fs_get_md)(struct inode *inode,
200 struct lov_stripe_md *md);
201 ssize_t (* fs_readpage)(struct file *file, char *buf, size_t count,
203 void (* fs_delete_inode)(struct inode *inode);
204 void (* cl_delete_inode)(struct inode *inode);
205 int (* fs_journal_data)(struct file *file);
206 int (* fs_set_last_rcvd)(struct mds_obd *mds, void *handle);
207 int (* fs_statfs)(struct super_block *sb, struct statfs *sfs);
210 extern int mds_register_fs_type(struct mds_fs_operations *op, const char *name);
211 extern void mds_unregister_fs_type(const char *name);
212 extern int mds_fs_setup(struct mds_obd *mds, struct vfsmount *mnt);
213 extern void mds_fs_cleanup(struct mds_obd *mds);
215 static inline void *mds_fs_start(struct mds_obd *mds, struct inode *inode,
218 return mds->mds_fsops->fs_start(inode, op);
221 static inline int mds_fs_commit(struct mds_obd *mds, struct inode *inode,
224 return mds->mds_fsops->fs_commit(inode, handle);
227 static inline int mds_fs_setattr(struct mds_obd *mds, struct dentry *dentry,
228 void *handle, struct iattr *iattr)
231 * NOTE: we probably don't need to take i_sem here when changing
232 * ATTR_SIZE because the MDS never needs to truncate a file.
233 * The ext2/ext3 code never truncates a directory, and files
234 * stored on the MDS are entirely sparse (no data blocks).
235 * If we do need to get it, we can do it here.
237 return mds->mds_fsops->fs_setattr(dentry, handle, iattr);
240 static inline int mds_fs_set_md(struct mds_obd *mds, struct inode *inode,
241 void *handle, struct lov_stripe_md *md)
243 return mds->mds_fsops->fs_set_md(inode, handle, md);
246 static inline int mds_fs_get_md(struct mds_obd *mds, struct inode *inode,
247 struct lov_stripe_md *md)
249 return mds->mds_fsops->fs_get_md(inode, md);
252 static inline ssize_t mds_fs_readpage(struct mds_obd *mds, struct file *file,
253 char *buf, size_t count, loff_t *offset)
255 return mds->mds_fsops->fs_readpage(file, buf, count, offset);
258 /* Set up callback to update mds->mds_last_committed with the current
259 * value of mds->mds_last_recieved when this transaction is on disk.
261 static inline int mds_fs_set_last_rcvd(struct mds_obd *mds, void *handle)
263 return mds->mds_fsops->fs_set_last_rcvd(mds, handle);
266 /* Enable data journaling on the given file */
267 static inline ssize_t mds_fs_journal_data(struct mds_obd *mds,
270 return mds->mds_fsops->fs_journal_data(file);
273 static inline int mds_fs_statfs(struct mds_obd *mds, struct statfs *sfs)
275 if (mds->mds_fsops->fs_statfs)
276 return mds->mds_fsops->fs_statfs(mds->mds_sb, sfs);
278 return vfs_statfs(mds->mds_sb, sfs);
281 #define MDS_FSOP_UNLINK 1
282 #define MDS_FSOP_RMDIR 2
283 #define MDS_FSOP_RENAME 3
284 #define MDS_FSOP_CREATE 4
285 #define MDS_FSOP_MKDIR 5
286 #define MDS_FSOP_SYMLINK 6
287 #define MDS_FSOP_MKNOD 7
288 #define MDS_FSOP_SETATTR 8
289 #define MDS_FSOP_LINK 9
291 #endif /* __KERNEL__ */
293 /* ioctls for trying requests */
294 #define IOC_REQUEST_TYPE 'f'
295 #define IOC_REQUEST_MIN_NR 30
297 #define IOC_REQUEST_GETATTR _IOWR('f', 30, long)
298 #define IOC_REQUEST_READPAGE _IOWR('f', 31, long)
299 #define IOC_REQUEST_SETATTR _IOWR('f', 32, long)
300 #define IOC_REQUEST_CREATE _IOWR('f', 33, long)
301 #define IOC_REQUEST_OPEN _IOWR('f', 34, long)
302 #define IOC_REQUEST_CLOSE _IOWR('f', 35, long)
303 #define IOC_REQUEST_MAX_NR 35