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 static inline void l_dput(struct dentry *de)
37 if (!de || IS_ERR(de))
39 shrink_dcache_parent(de);
43 #define LUSTRE_MDS_NAME "mds"
45 struct mds_update_record {
47 struct ll_fid *ur_fid1;
48 struct ll_fid *ur_fid2;
53 struct iattr ur_iattr;
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, struct ptlrpc_request *req);
105 struct mds_client_info *mds_uuid_to_mci(struct mds_obd *mds, __u8 *uuid);
107 /* lib/mds_updates.c */
108 void mds_pack_req_body(struct ptlrpc_request *);
109 void mds_pack_rep_body(struct ptlrpc_request *);
110 void mds_unpack_req_body(struct ptlrpc_request *);
111 void mds_unpack_rep_body(struct ptlrpc_request *);
112 int mds_update_unpack(struct ptlrpc_request *, struct mds_update_record *);
114 void mds_setattr_pack(struct mds_rec_setattr *, struct inode *, struct iattr *);
115 void mds_create_pack(struct mds_rec_create *, struct inode *, __u32 mode,
116 __u64 id, __u32 uid, __u32 gid, __u64 time);
117 void mds_unlink_pack(struct mds_rec_unlink *, struct inode *inode,
118 struct inode *child);
119 void mds_link_pack(struct mds_rec_link *, struct inode *ino, struct inode *dir);
120 void mds_rename_pack(struct mds_rec_rename *, struct inode *srcdir,
121 struct inode *tgtdir);
124 struct dentry *mds_fid2dentry(struct mds_obd *mds, struct ll_fid *fid, struct vfsmount **mnt);
126 /* mdc/mdc_request.c */
127 int mdc_connect(struct ptlrpc_client *, struct ptlrpc_connection *,
128 struct ll_fid *rootfid, __u64 *last_committed, __u64 *last_rcvd,
129 __u32 *last_xid, struct ptlrpc_request **);
130 int mdc_getattr(struct ptlrpc_client *, struct ptlrpc_connection *, ino_t ino,
131 int type, unsigned long valid, size_t ea_size,
132 struct ptlrpc_request **);
133 int mdc_setattr(struct ptlrpc_client *, struct ptlrpc_connection *,
134 struct inode *, struct iattr *iattr, struct ptlrpc_request **);
135 int mdc_open(struct ptlrpc_client *, struct ptlrpc_connection *, ino_t ino,
136 int type, int flags, __u64 cookie, __u64 *fh, struct ptlrpc_request **req);
137 int mdc_close(struct ptlrpc_client *cl, struct ptlrpc_connection *peer,
138 ino_t ino, int type, __u64 fh, struct ptlrpc_request **req);
139 int mdc_readpage(struct ptlrpc_client *, struct ptlrpc_connection *, ino_t ino,
140 int type, __u64 offset, char *addr, struct ptlrpc_request **);
141 int mdc_create(struct ptlrpc_client *, struct ptlrpc_connection *,
142 struct inode *dir, const char *name, int namelen,
143 const char *tgt, int tgtlen,
144 int mode, __u64 id, __u32 uid, __u32 gid, __u64 time,
145 struct ptlrpc_request **);
146 int mdc_unlink(struct ptlrpc_client *, struct ptlrpc_connection *,
147 struct inode *dir, struct inode *child, const char *name,
148 int namelen, struct ptlrpc_request **);
149 int mdc_link(struct ptlrpc_client *, struct ptlrpc_connection *,
150 struct dentry *src, struct inode *dir, const char *name,
151 int namelen, struct ptlrpc_request **);
152 int mdc_rename(struct ptlrpc_client *, struct ptlrpc_connection *,
153 struct inode *src, struct inode *tgt, const char *old,
154 int oldlen, const char *new, int newlen,
155 struct ptlrpc_request **);
156 int mdc_create_client(char *uuid, struct ptlrpc_client *cl);
158 struct mds_fs_operations {
159 void *(* fs_start)(struct inode *inode, int op);
160 int (* fs_commit)(struct inode *inode, void *handle);
161 int (* fs_setattr)(struct dentry *dentry, void *handle,
162 struct iattr *iattr);
163 int (* fs_set_objid)(struct inode *inode, void *handle, obd_id id);
164 void (* fs_get_objid)(struct inode *inode, obd_id *id);
165 ssize_t (* fs_readpage)(struct file *file, char *buf, size_t count,
167 void (* fs_delete_inode)(struct inode *inode);
168 void (* cl_delete_inode)(struct inode *inode);
169 int (* fs_journal_data)(struct file *file);
170 int (* fs_set_last_rcvd)(struct mds_obd *mds, void *handle);
173 #define MDS_FSOP_UNLINK 1
174 #define MDS_FSOP_RMDIR 2
175 #define MDS_FSOP_RENAME 3
176 #define MDS_FSOP_CREATE 4
177 #define MDS_FSOP_MKDIR 5
178 #define MDS_FSOP_SYMLINK 6
179 #define MDS_FSOP_MKNOD 7
180 #define MDS_FSOP_SETATTR 8
181 #define MDS_FSOP_LINK 9
183 static inline void *mds_fs_start(struct mds_obd *mds, struct inode *inode,
186 return mds->mds_fsops->fs_start(inode, op);
189 static inline int mds_fs_commit(struct mds_obd *mds, struct inode *inode,
192 return mds->mds_fsops->fs_commit(inode, handle);
195 static inline int mds_fs_setattr(struct mds_obd *mds, struct dentry *dentry,
196 void *handle, struct iattr *iattr)
199 * NOTE: we probably don't need to take i_sem here when changing
200 * ATTR_SIZE because the MDS never needs to truncate a file.
201 * The ext2/ext3 code never truncates a directory, and files
202 * stored on the MDS are entirely sparse (no data blocks).
203 * If we do need to get it, we can do it here.
205 return mds->mds_fsops->fs_setattr(dentry, handle, iattr);
208 static inline int mds_fs_set_objid(struct mds_obd *mds, struct inode *inode,
209 void *handle, __u64 id)
211 return mds->mds_fsops->fs_set_objid(inode, handle, id);
214 static inline void mds_fs_get_objid(struct mds_obd *mds, struct inode *inode,
217 mds->mds_fsops->fs_get_objid(inode, id);
220 static inline ssize_t mds_fs_readpage(struct mds_obd *mds, struct file *file,
221 char *buf, size_t count, loff_t *offset)
223 return mds->mds_fsops->fs_readpage(file, buf, count, offset);
226 /* Set up callback to update mds->mds_last_committed with the current
227 * value of mds->mds_last_recieved when this transaction is on disk.
229 static inline int mds_fs_set_last_rcvd(struct mds_obd *mds, void *handle)
231 return mds->mds_fsops->fs_set_last_rcvd(mds, handle);
234 /* Enable data journaling on the given file */
235 static inline ssize_t mds_fs_journal_data(struct mds_obd *mds,
238 return mds->mds_fsops->fs_journal_data(file);
241 extern struct mds_fs_operations mds_ext2_fs_ops;
242 extern struct mds_fs_operations mds_ext3_fs_ops;
243 extern struct mds_fs_operations mds_extN_fs_ops;
245 #endif /* __KERNEL__ */
247 /* ioctls for trying requests */
248 #define IOC_REQUEST_TYPE 'f'
249 #define IOC_REQUEST_MIN_NR 30
251 #define IOC_REQUEST_GETATTR _IOWR('f', 30, long)
252 #define IOC_REQUEST_READPAGE _IOWR('f', 31, long)
253 #define IOC_REQUEST_SETATTR _IOWR('f', 32, long)
254 #define IOC_REQUEST_CREATE _IOWR('f', 33, long)
255 #define IOC_REQUEST_OPEN _IOWR('f', 34, long)
256 #define IOC_REQUEST_CLOSE _IOWR('f', 35, long)
257 #define IOC_REQUEST_MAX_NR 35