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;
62 int mds_reint_rec(struct mds_update_record *r, struct ptlrpc_request *req);
64 /* lib/mds_updates.c */
65 void mds_pack_body(struct ptlrpc_request *);
66 void mds_unpack_body(struct ptlrpc_request *);
67 int mds_update_unpack(struct ptlrpc_request *, struct mds_update_record *);
69 void mds_setattr_pack(struct mds_rec_setattr *, struct inode *, struct iattr *);
70 void mds_create_pack(struct mds_rec_create *, struct inode *, __u32 mode,
71 __u64 id, __u32 uid, __u32 gid, __u64 time);
72 void mds_unlink_pack(struct mds_rec_unlink *, struct inode *inode,
74 void mds_link_pack(struct mds_rec_link *, struct inode *ino, struct inode *dir);
75 void mds_rename_pack(struct mds_rec_rename *, struct inode *srcdir,
76 struct inode *tgtdir);
79 struct dentry *mds_fid2dentry(struct mds_obd *mds, struct ll_fid *fid, struct vfsmount **mnt);
81 /* llight/request.c */
82 int mdc_getattr(struct ptlrpc_client *, struct ptlrpc_connection *, ino_t ino,
83 int type, int valid, struct ptlrpc_request **);
84 int mdc_setattr(struct ptlrpc_client *, struct ptlrpc_connection *,
85 struct inode *, struct iattr *iattr, struct ptlrpc_request **);
86 int mdc_open(struct ptlrpc_client *, struct ptlrpc_connection *, ino_t ino,
87 int type, int flags, __u64 *fh, struct ptlrpc_request **req);
88 int mdc_close(struct ptlrpc_client *cl, struct ptlrpc_connection *peer,
89 ino_t ino, int type, __u64 fh, struct ptlrpc_request **req);
90 int mdc_readpage(struct ptlrpc_client *, struct ptlrpc_connection *, ino_t ino,
91 int type, __u64 offset, char *addr, struct ptlrpc_request **);
92 int mdc_create(struct ptlrpc_client *, struct ptlrpc_connection *,
93 struct inode *dir, const char *name, int namelen,
94 const char *tgt, int tgtlen,
95 int mode, __u64 id, __u32 uid, __u32 gid, __u64 time,
96 struct ptlrpc_request **);
97 int mdc_unlink(struct ptlrpc_client *, struct ptlrpc_connection *,
98 struct inode *dir, struct inode *child, const char *name,
99 int namelen, struct ptlrpc_request **);
100 int mdc_link(struct ptlrpc_client *, struct ptlrpc_connection *,
101 struct dentry *src, struct inode *dir, const char *name,
102 int namelen, struct ptlrpc_request **);
103 int mdc_rename(struct ptlrpc_client *, struct ptlrpc_connection *,
104 struct inode *src, struct inode *tgt, const char *old,
105 int oldlen, const char *new, int newlen,
106 struct ptlrpc_request **);
107 int mdc_create_client(char *uuid, struct ptlrpc_client *cl);
109 struct mds_fs_operations {
110 void *(* fs_start)(struct inode *inode, int op);
111 int (* fs_commit)(struct inode *inode, void *handle);
112 int (* fs_setattr)(struct dentry *dentry, void *handle,
113 struct iattr *iattr);
114 int (* fs_set_objid)(struct inode *inode, void *handle, obd_id id);
115 void (* fs_get_objid)(struct inode *inode, obd_id *id);
116 ssize_t (* fs_readpage)(struct file *file, char *buf, size_t count,
118 void (* fs_delete_inode)(struct inode *inode);
119 void (* cl_delete_inode)(struct inode *inode);
122 #define MDS_FSOP_UNLINK 1
123 #define MDS_FSOP_RMDIR 2
124 #define MDS_FSOP_RENAME 3
125 #define MDS_FSOP_CREATE 4
126 #define MDS_FSOP_MKDIR 5
127 #define MDS_FSOP_SYMLINK 6
128 #define MDS_FSOP_MKNOD 7
130 static inline void *mds_fs_start(struct mds_obd *mds, struct inode *inode,
133 return mds->mds_fsops->fs_start(inode, op);
136 static inline int mds_fs_commit(struct mds_obd *mds, struct inode *inode,
139 return mds->mds_fsops->fs_commit(inode, handle);
142 static inline int mds_fs_setattr(struct mds_obd *mds, struct dentry *dentry,
143 void *handle, struct iattr *iattr)
146 * NOTE: we probably don't need to take i_sem here when changing
147 * ATTR_SIZE because the MDS never needs to truncate a file.
148 * The ext2/ext3 code never truncates a directory, and files
149 * stored on the MDS are entirely sparse (no data blocks).
150 * If we do need to get it, we can do it here.
152 return mds->mds_fsops->fs_setattr(dentry, handle, iattr);
155 static inline int mds_fs_set_objid(struct mds_obd *mds, struct inode *inode,
156 void *handle, __u64 id)
158 return mds->mds_fsops->fs_set_objid(inode, handle, id);
161 static inline void mds_fs_get_objid(struct mds_obd *mds, struct inode *inode,
164 mds->mds_fsops->fs_get_objid(inode, id);
167 static inline ssize_t mds_fs_readpage(struct mds_obd *mds, struct file *file,
168 char *buf, size_t count, loff_t *offset)
170 return mds->mds_fsops->fs_readpage(file, buf, count, offset);
173 extern struct mds_fs_operations mds_ext2_fs_ops;
174 extern struct mds_fs_operations mds_ext3_fs_ops;
176 #endif /* __KERNEL__ */
178 /* ioctls for trying requests */
179 #define IOC_REQUEST_TYPE 'f'
180 #define IOC_REQUEST_MIN_NR 30
182 #define IOC_REQUEST_GETATTR _IOWR('f', 30, long)
183 #define IOC_REQUEST_READPAGE _IOWR('f', 31, long)
184 #define IOC_REQUEST_SETATTR _IOWR('f', 32, long)
185 #define IOC_REQUEST_CREATE _IOWR('f', 33, long)
186 #define IOC_REQUEST_OPEN _IOWR('f', 34, long)
187 #define IOC_REQUEST_CLOSE _IOWR('f', 35, long)
188 #define IOC_REQUEST_MAX_NR 35