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>
35 #define LUSTRE_MDS_NAME "mds"
37 struct mds_update_record {
39 struct ll_fid *ur_fid1;
40 struct ll_fid *ur_fid2;
45 struct iattr ur_iattr;
53 #define MDS_LR_CLIENT 8192
54 #define MDS_LR_SIZE 128
56 #define MDS_CLIENT_SLOTS 17
58 #define MDS_MOUNT_RECOV 2
60 /* Data stored per server at the head of the last_rcvd file. In le32 order. */
61 struct mds_server_data {
62 __u8 msd_uuid[37]; /* server UUID */
63 __u8 uuid_padding[3]; /* unused */
64 __u64 msd_last_rcvd; /* last completed transaction ID */
65 __u64 msd_mount_count; /* MDS incarnation number */
66 __u8 padding[512 - 56];
69 /* Data stored per client in the last_rcvd file. In le32 order. */
70 struct mds_client_data {
71 __u8 mcd_uuid[37]; /* client UUID */
72 __u8 uuid_padding[3]; /* unused */
73 __u64 mcd_last_rcvd; /* last completed transaction ID */
74 __u64 mcd_mount_count; /* MDS incarnation number */
75 __u32 mcd_last_xid; /* client RPC xid for the last transaction */
76 __u8 padding[MDS_LR_SIZE - 60];
79 /* In-memory access to client data from MDS struct */
80 struct mds_client_info {
81 struct list_head mci_list;
82 struct list_head mci_open_head;
83 struct mds_client_data *mci_mcd;
87 /* file data for open files on MDS */
88 struct mds_file_data {
89 struct list_head mfd_list;
90 struct file * mfd_file;
92 __u32 mfd_clientcookie;
96 int mds_reint_rec(struct mds_update_record *r, struct ptlrpc_request *req);
97 struct mds_client_info *mds_uuid_to_mci(struct mds_obd *mds, __u8 *uuid);
99 /* lib/mds_updates.c */
100 void mds_pack_req_body(struct ptlrpc_request *);
101 void mds_pack_rep_body(struct ptlrpc_request *);
102 void mds_unpack_req_body(struct ptlrpc_request *);
103 void mds_unpack_rep_body(struct ptlrpc_request *);
104 int mds_update_unpack(struct ptlrpc_request *, struct mds_update_record *);
106 void mds_setattr_pack(struct mds_rec_setattr *, struct inode *, struct iattr *);
107 void mds_create_pack(struct mds_rec_create *, struct inode *, __u32 mode,
108 __u64 id, __u32 uid, __u32 gid, __u64 time);
109 void mds_unlink_pack(struct mds_rec_unlink *, struct inode *inode,
110 struct inode *child);
111 void mds_link_pack(struct mds_rec_link *, struct inode *ino, struct inode *dir);
112 void mds_rename_pack(struct mds_rec_rename *, struct inode *srcdir,
113 struct inode *tgtdir);
116 struct dentry *mds_fid2dentry(struct mds_obd *mds, struct ll_fid *fid, struct vfsmount **mnt);
118 /* mdc/mdc_request.c */
119 int mdc_connect(struct ptlrpc_client *, struct ptlrpc_connection *,
120 struct ll_fid *rootfid, __u64 *last_committed, __u64 *last_rcvd,
121 __u32 *last_xid, struct ptlrpc_request **);
122 int mdc_getattr(struct ptlrpc_client *, struct ptlrpc_connection *, ino_t ino,
123 int type, unsigned long valid, size_t ea_size,
124 struct ptlrpc_request **);
125 int mdc_setattr(struct ptlrpc_client *, struct ptlrpc_connection *,
126 struct inode *, struct iattr *iattr, struct ptlrpc_request **);
127 int mdc_open(struct ptlrpc_client *, struct ptlrpc_connection *, ino_t ino,
128 int type, int flags, __u64 cookie, __u64 *fh, struct ptlrpc_request **req);
129 int mdc_close(struct ptlrpc_client *cl, struct ptlrpc_connection *peer,
130 ino_t ino, int type, __u64 fh, struct ptlrpc_request **req);
131 int mdc_readpage(struct ptlrpc_client *, struct ptlrpc_connection *, ino_t ino,
132 int type, __u64 offset, char *addr, struct ptlrpc_request **);
133 int mdc_create(struct ptlrpc_client *, struct ptlrpc_connection *,
134 struct inode *dir, const char *name, int namelen,
135 const char *tgt, int tgtlen,
136 int mode, __u64 id, __u32 uid, __u32 gid, __u64 time,
137 struct ptlrpc_request **);
138 int mdc_unlink(struct ptlrpc_client *, struct ptlrpc_connection *,
139 struct inode *dir, struct inode *child, const char *name,
140 int namelen, struct ptlrpc_request **);
141 int mdc_link(struct ptlrpc_client *, struct ptlrpc_connection *,
142 struct dentry *src, struct inode *dir, const char *name,
143 int namelen, struct ptlrpc_request **);
144 int mdc_rename(struct ptlrpc_client *, struct ptlrpc_connection *,
145 struct inode *src, struct inode *tgt, const char *old,
146 int oldlen, const char *new, int newlen,
147 struct ptlrpc_request **);
148 int mdc_create_client(char *uuid, struct ptlrpc_client *cl);
150 extern int mds_client_add(struct mds_obd *mds, struct mds_client_data *mcd,
154 struct mds_fs_operations {
155 void *(* fs_start)(struct inode *inode, int op);
156 int (* fs_commit)(struct inode *inode, void *handle);
157 int (* fs_setattr)(struct dentry *dentry, void *handle,
158 struct iattr *iattr);
159 int (* fs_set_objid)(struct inode *inode, void *handle, obd_id id);
160 int (* fs_get_objid)(struct inode *inode, obd_id *id);
161 ssize_t (* fs_readpage)(struct file *file, char *buf, size_t count,
163 void (* fs_delete_inode)(struct inode *inode);
164 void (* cl_delete_inode)(struct inode *inode);
165 int (* fs_journal_data)(struct file *file);
166 int (* fs_set_last_rcvd)(struct mds_obd *mds, void *handle);
169 extern int mds_register_fs_type(struct mds_fs_operations *op, const char *name);
170 extern void mds_unregister_fs_type(const char *name);
171 extern int mds_fs_setup(struct mds_obd *mds, struct vfsmount *mnt);
172 extern void mds_fs_cleanup(struct mds_obd *mds);
174 static inline void *mds_fs_start(struct mds_obd *mds, struct inode *inode,
177 return mds->mds_fsops->fs_start(inode, op);
180 static inline int mds_fs_commit(struct mds_obd *mds, struct inode *inode,
183 return mds->mds_fsops->fs_commit(inode, handle);
186 static inline int mds_fs_setattr(struct mds_obd *mds, struct dentry *dentry,
187 void *handle, struct iattr *iattr)
190 * NOTE: we probably don't need to take i_sem here when changing
191 * ATTR_SIZE because the MDS never needs to truncate a file.
192 * The ext2/ext3 code never truncates a directory, and files
193 * stored on the MDS are entirely sparse (no data blocks).
194 * If we do need to get it, we can do it here.
196 return mds->mds_fsops->fs_setattr(dentry, handle, iattr);
199 static inline int mds_fs_set_objid(struct mds_obd *mds, struct inode *inode,
200 void *handle, __u64 id)
202 return mds->mds_fsops->fs_set_objid(inode, handle, id);
205 static inline int mds_fs_get_objid(struct mds_obd *mds, struct inode *inode,
208 return mds->mds_fsops->fs_get_objid(inode, id);
211 static inline ssize_t mds_fs_readpage(struct mds_obd *mds, struct file *file,
212 char *buf, size_t count, loff_t *offset)
214 return mds->mds_fsops->fs_readpage(file, buf, count, offset);
217 /* Set up callback to update mds->mds_last_committed with the current
218 * value of mds->mds_last_recieved when this transaction is on disk.
220 static inline int mds_fs_set_last_rcvd(struct mds_obd *mds, void *handle)
222 return mds->mds_fsops->fs_set_last_rcvd(mds, handle);
225 /* Enable data journaling on the given file */
226 static inline ssize_t mds_fs_journal_data(struct mds_obd *mds,
229 return mds->mds_fsops->fs_journal_data(file);
232 #define MDS_FSOP_UNLINK 1
233 #define MDS_FSOP_RMDIR 2
234 #define MDS_FSOP_RENAME 3
235 #define MDS_FSOP_CREATE 4
236 #define MDS_FSOP_MKDIR 5
237 #define MDS_FSOP_SYMLINK 6
238 #define MDS_FSOP_MKNOD 7
239 #define MDS_FSOP_SETATTR 8
240 #define MDS_FSOP_LINK 9
242 #endif /* __KERNEL__ */
244 /* ioctls for trying requests */
245 #define IOC_REQUEST_TYPE 'f'
246 #define IOC_REQUEST_MIN_NR 30
248 #define IOC_REQUEST_GETATTR _IOWR('f', 30, long)
249 #define IOC_REQUEST_READPAGE _IOWR('f', 31, long)
250 #define IOC_REQUEST_SETATTR _IOWR('f', 32, long)
251 #define IOC_REQUEST_CREATE _IOWR('f', 33, long)
252 #define IOC_REQUEST_OPEN _IOWR('f', 34, long)
253 #define IOC_REQUEST_CLOSE _IOWR('f', 35, long)
254 #define IOC_REQUEST_MAX_NR 35