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 1024
62 #define MDS_LR_SIZE 128
64 #define MDS_MOUNT_RECOV 2
66 /* Data stored per server at the head of the last_rcvd file */
67 struct mds_server_data {
68 __u8 msd_uuid[37]; /* server UUID */
69 __u8 uuid_padding[3]; /* in case we decide to store UUIDs as ASCII */
70 __u64 msd_last_rcvd; /* last completed transaction ID */
71 __u64 msd_mount_count; /* MDS incarnation number */
72 __u8 padding[512 - 56];
75 /* Data stored per client in the last_rcvd file */
76 struct mds_client_data {
77 __u8 mcd_uuid[37]; /* client UUID */
78 __u8 uuid_padding[3]; /* in case we decide to store UUIDs as ASCII */
79 __u64 mcd_last_rcvd; /* last completed transaction ID */
80 __u64 mcd_mount_count; /* MDS incarnation number */
81 __u8 padding[MDS_LR_SIZE - 56];
85 int mds_reint_rec(struct mds_update_record *r, struct ptlrpc_request *req);
87 /* lib/mds_updates.c */
88 void mds_pack_req_body(struct ptlrpc_request *);
89 void mds_pack_rep_body(struct ptlrpc_request *);
90 void mds_unpack_req_body(struct ptlrpc_request *);
91 void mds_unpack_rep_body(struct ptlrpc_request *);
92 int mds_update_unpack(struct ptlrpc_request *, struct mds_update_record *);
94 void mds_setattr_pack(struct mds_rec_setattr *, struct inode *, struct iattr *);
95 void mds_create_pack(struct mds_rec_create *, struct inode *, __u32 mode,
96 __u64 id, __u32 uid, __u32 gid, __u64 time);
97 void mds_unlink_pack(struct mds_rec_unlink *, struct inode *inode,
99 void mds_link_pack(struct mds_rec_link *, struct inode *ino, struct inode *dir);
100 void mds_rename_pack(struct mds_rec_rename *, struct inode *srcdir,
101 struct inode *tgtdir);
104 struct dentry *mds_fid2dentry(struct mds_obd *mds, struct ll_fid *fid, struct vfsmount **mnt);
106 /* llight/request.c */
107 int mdc_connect(struct ptlrpc_client *, struct ptlrpc_connection *,
108 struct ll_fid *rootfid, struct ptlrpc_request **);
109 int mdc_getattr(struct ptlrpc_client *, struct ptlrpc_connection *, ino_t ino,
110 int type, unsigned long valid, struct ptlrpc_request **);
111 int mdc_setattr(struct ptlrpc_client *, struct ptlrpc_connection *,
112 struct inode *, struct iattr *iattr, struct ptlrpc_request **);
113 int mdc_open(struct ptlrpc_client *, struct ptlrpc_connection *, ino_t ino,
114 int type, int flags, __u64 *fh, struct ptlrpc_request **req);
115 int mdc_close(struct ptlrpc_client *cl, struct ptlrpc_connection *peer,
116 ino_t ino, int type, __u64 fh, struct ptlrpc_request **req);
117 int mdc_readpage(struct ptlrpc_client *, struct ptlrpc_connection *, ino_t ino,
118 int type, __u64 offset, char *addr, struct ptlrpc_request **);
119 int mdc_create(struct ptlrpc_client *, struct ptlrpc_connection *,
120 struct inode *dir, const char *name, int namelen,
121 const char *tgt, int tgtlen,
122 int mode, __u64 id, __u32 uid, __u32 gid, __u64 time,
123 struct ptlrpc_request **);
124 int mdc_unlink(struct ptlrpc_client *, struct ptlrpc_connection *,
125 struct inode *dir, struct inode *child, const char *name,
126 int namelen, struct ptlrpc_request **);
127 int mdc_link(struct ptlrpc_client *, struct ptlrpc_connection *,
128 struct dentry *src, struct inode *dir, const char *name,
129 int namelen, struct ptlrpc_request **);
130 int mdc_rename(struct ptlrpc_client *, struct ptlrpc_connection *,
131 struct inode *src, struct inode *tgt, const char *old,
132 int oldlen, const char *new, int newlen,
133 struct ptlrpc_request **);
134 int mdc_create_client(char *uuid, struct ptlrpc_client *cl);
136 struct mds_fs_operations {
137 void *(* fs_start)(struct inode *inode, int op);
138 int (* fs_commit)(struct inode *inode, void *handle);
139 int (* fs_setattr)(struct dentry *dentry, void *handle,
140 struct iattr *iattr);
141 int (* fs_set_objid)(struct inode *inode, void *handle, obd_id id);
142 void (* fs_get_objid)(struct inode *inode, obd_id *id);
143 ssize_t (* fs_readpage)(struct file *file, char *buf, size_t count,
145 void (* fs_delete_inode)(struct inode *inode);
146 void (* cl_delete_inode)(struct inode *inode);
147 int (* fs_journal_data)(struct inode *inode, struct file *file);
150 #define MDS_FSOP_UNLINK 1
151 #define MDS_FSOP_RMDIR 2
152 #define MDS_FSOP_RENAME 3
153 #define MDS_FSOP_CREATE 4
154 #define MDS_FSOP_MKDIR 5
155 #define MDS_FSOP_SYMLINK 6
156 #define MDS_FSOP_MKNOD 7
157 #define MDS_FSOP_SETATTR 8
158 #define MDS_FSOP_LINK 9
160 static inline void *mds_fs_start(struct mds_obd *mds, struct inode *inode,
163 return mds->mds_fsops->fs_start(inode, op);
166 static inline int mds_fs_commit(struct mds_obd *mds, struct inode *inode,
169 return mds->mds_fsops->fs_commit(inode, handle);
172 static inline int mds_fs_setattr(struct mds_obd *mds, struct dentry *dentry,
173 void *handle, struct iattr *iattr)
176 * NOTE: we probably don't need to take i_sem here when changing
177 * ATTR_SIZE because the MDS never needs to truncate a file.
178 * The ext2/ext3 code never truncates a directory, and files
179 * stored on the MDS are entirely sparse (no data blocks).
180 * If we do need to get it, we can do it here.
182 return mds->mds_fsops->fs_setattr(dentry, handle, iattr);
185 static inline int mds_fs_set_objid(struct mds_obd *mds, struct inode *inode,
186 void *handle, __u64 id)
188 return mds->mds_fsops->fs_set_objid(inode, handle, id);
191 static inline void mds_fs_get_objid(struct mds_obd *mds, struct inode *inode,
194 mds->mds_fsops->fs_get_objid(inode, id);
197 static inline ssize_t mds_fs_readpage(struct mds_obd *mds, struct file *file,
198 char *buf, size_t count, loff_t *offset)
200 return mds->mds_fsops->fs_readpage(file, buf, count, offset);
203 static inline ssize_t mds_fs_journal_data(struct mds_obd *mds,
207 return mds->mds_fsops->fs_journal_data(inode, file);
210 extern struct mds_fs_operations mds_ext2_fs_ops;
211 extern struct mds_fs_operations mds_ext3_fs_ops;
213 #endif /* __KERNEL__ */
215 /* ioctls for trying requests */
216 #define IOC_REQUEST_TYPE 'f'
217 #define IOC_REQUEST_MIN_NR 30
219 #define IOC_REQUEST_GETATTR _IOWR('f', 30, long)
220 #define IOC_REQUEST_READPAGE _IOWR('f', 31, long)
221 #define IOC_REQUEST_SETATTR _IOWR('f', 32, long)
222 #define IOC_REQUEST_CREATE _IOWR('f', 33, long)
223 #define IOC_REQUEST_OPEN _IOWR('f', 34, long)
224 #define IOC_REQUEST_CLOSE _IOWR('f', 35, long)
225 #define IOC_REQUEST_MAX_NR 35