2 * OBDFS Super operations
4 * Copryright (C) 1996 Peter J. Braam <braam@stelias.com>
5 * Copryright (C) 1999 Stelias Computing Inc. <braam@stelias.com>
6 * Copryright (C) 1999 Seagate Technology Inc.
12 #include <linux/config.h>
13 #include <linux/module.h>
14 #include <linux/kernel.h>
16 #include <linux/string.h>
17 #include <linux/stat.h>
18 #include <linux/errno.h>
19 #include <linux/locks.h>
20 #include <linux/unistd.h>
22 #include <asm/system.h>
23 #include <asm/uaccess.h>
26 #include <linux/stat.h>
27 #include <asm/uaccess.h>
28 #include <linux/vmalloc.h>
29 #include <asm/segment.h>
31 #include <linux/obd_support.h>
32 #include <linux/obd_class.h>
33 #include <linux/obd_sim.h> /* XXX for development/debugging only */
36 /* VFS super_block ops */
37 static struct super_block *obdfs_read_super(struct super_block *, void *, int);
38 static void obdfs_read_inode(struct inode *);
39 static int obdfs_notify_change(struct dentry *dentry, struct iattr *attr);
40 static void obdfs_write_inode(struct inode *);
41 static void obdfs_delete_inode(struct inode *);
42 static void obdfs_put_super(struct super_block *);
43 static int obdfs_statfs(struct super_block *sb, struct statfs *buf,
46 /* exported operations */
47 struct super_operations obdfs_super_operations =
49 obdfs_read_inode, /* read_inode */
50 obdfs_write_inode, /* write_inode */
52 obdfs_delete_inode, /* delete_inode */
53 obdfs_notify_change, /* notify_change */
54 obdfs_put_super, /* put_super */
55 NULL, /* write_super */
56 obdfs_statfs, /* statfs */
60 struct obdfs_sb_info obdfs_super_info;
64 static struct super_block * obdfs_read_super(struct super_block *sb,
65 void *data, int silent)
67 struct inode *root = 0;
68 struct obdfs_sb_info *sbi = NULL;
74 sbi = &obdfs_super_info;
76 if ( sbi->osi_super ) {
77 printk("Already mounted\n");
82 sbi->osi_obd = &obd_dev[obd_minor];
83 sbi->osi_ops = sbi->osi_obd->obd_type->typ_ops;
85 error = sbi->osi_ops->o_connect(obd_minor, &sbi->osi_conn_info);
87 printk("OBDFS: cannot connect to 0x%x.\n", obd_minor);
94 sb->u.generic_sbp = sbi;
95 sb->s_blocksize = sbi->osi_conn_info.conn_blocksize;
96 sb->s_blocksize_bits = sbi->osi_conn_info.conn_blocksize_bits;
97 sb->s_magic = OBDFS_SUPER_MAGIC;
98 sb->s_op = &obdfs_super_operations;
100 /* make root inode */
101 root = iget(sb, sbi->osi_conn_info.conn_ino);
102 if (!root || is_bad_inode(root)) {
103 printk("OBDFS: bad iget for root\n");
110 printk("obdfs_read_super: rootinode is %ld dev %d\n",
111 root->i_ino, root->i_dev);
112 sb->s_root = d_alloc_root(root);
121 sbi->osi_super = NULL;
130 static void obdfs_put_super(struct super_block *sb)
132 struct obdfs_sb_info *sbi;
139 /* XXX flush stuff */
140 sbi = sb->u.generic_sbp;
141 sb->u.generic_sbp = NULL;
142 sbi->osi_ops->o_disconnect(sbi->osi_conn_info.conn_id);
143 sbi->osi_super = NULL;
146 printk("OBDFS: Bye bye.\n");
147 memset(sbi, 0, sizeof(* sbi));
153 extern struct inode_operations obdfs_inode_ops;
155 /* all filling in of inodes postponed until lookup */
156 static void obdfs_read_inode(struct inode *inode)
160 struct obdfs_sb_info *sbi = inode->i_sb->u.generic_sbp;
163 error = sbi->osi_ops->o_getattr(sbi->osi_conn_info.conn_id,
164 inode->i_ino, &attr);
166 printk("obdfs_read_inode: ibd_getattr fails (%d)\n", error);
170 inode_setattr(inode, &attr);
171 inode->i_op = &obdfs_inode_ops;
175 static void inode_to_iattr(struct inode *inode, struct iattr *tmp)
177 tmp->ia_mode = inode->i_mode;
178 tmp->ia_uid = inode->i_uid;
179 tmp->ia_gid = inode->i_gid;
180 tmp->ia_size = inode->i_size;
181 tmp->ia_atime = inode->i_atime;
182 tmp->ia_mtime = inode->i_mtime;
183 tmp->ia_ctime = inode->i_ctime;
184 tmp->ia_attr_flags = inode->i_flags;
189 static void obdfs_write_inode(struct inode *inode)
191 struct obdfs_sb_info *sbi;
195 inode_to_iattr(inode, &attr);
196 sbi = inode->i_sb->u.generic_sbp;
197 error = sbi->osi_ops->o_setattr(sbi->osi_conn_info.conn_id,
198 inode->i_ino, &attr);
200 printk("obdfs_write_inode: ibd_setattr fails (%d)\n", error);
207 static void obdfs_delete_inode(struct inode *inode)
209 struct obdfs_sb_info *sbi;
213 sbi = inode->i_sb->u.generic_sbp;
214 error = sbi->osi_ops->o_destroy(sbi->osi_conn_info.conn_id,
217 printk("obdfs_delete_node: ibd_destroy fails (%d)\n", error);
224 static int obdfs_notify_change(struct dentry *de, struct iattr *iattr)
226 struct inode *inode = de->d_inode;
227 struct obdfs_sb_info * sbi;
232 sbi = inode->i_sb->u.generic_sbp;
233 error = sbi->osi_ops->o_setattr(sbi->osi_conn_info.conn_id,
234 inode->i_ino, iattr);
236 printk("obdfs_notify_change: obd_setattr fails (%d)\n", error);
239 inode_setattr(inode, iattr);
246 static int obdfs_statfs(struct super_block *sb, struct statfs *buf,
250 struct obdfs_sb_info * sbi;
255 sbi = sb->u.generic_sbp;
256 error = sbi->osi_ops->o_statfs(sbi->osi_conn_info.conn_id, &tmp);
258 printk("obdfs_notify_change: obd_statfs fails (%d)\n", error);
261 copy_to_user(buf, &tmp, (bufsize<sizeof(tmp)) ? bufsize : sizeof(tmp));
268 struct file_system_type obdfs_fs_type = {
269 "obdfs", 0, obdfs_read_super, NULL
274 printk(KERN_INFO "OBDFS v0.1, braam@stelias.com\n");
278 obd_sbi = &obdfs_super_info;
279 obd_fso = &obdfs_file_operations;
281 return register_filesystem(&obdfs_fs_type);
286 int init_module(void)
291 void cleanup_module(void)
295 obdfs_sysctl_clean();
296 unregister_filesystem(&obdfs_fs_type);
298 void obdfs_psdev_dec_use_count(void)
303 EXPORT_SYMBOL(obdfs_psdev_dec_use_count);