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;
69 struct obd_device *obddev;
71 unsigned long blocksize;
72 unsigned long blocksize_bits;
73 unsigned long root_ino;
80 sbi = &obdfs_super_info;
82 if ( sbi->osi_super ) {
83 printk("Already mounted\n");
88 obddev = &obd_dev[obd_minor];
90 if ( ! (obddev->obd_flags & OBD_ATTACHED) ||
91 ! (obddev->obd_flags & OBD_SET_UP) )
94 sbi->osi_obd = obddev;
95 sbi->osi_ops = sbi->osi_obd->obd_type->typ_ops;
97 error = sbi->osi_ops->o_connect(sbi->osi_obd, &sbi->osi_conn_info);
99 printk("OBDFS: cannot connect to 0x%x.\n", obd_minor);
105 error = sbi->osi_ops->o_get_info(sbi->osi_conn_info.conn_id,
108 &scratch, (void *)&blocksize);
110 printk("Getinfo call to drive failed (blocksize)\n");
114 error = sbi->osi_ops->o_get_info(sbi->osi_conn_info.conn_id,
115 strlen("blocksize_bits"),
117 &scratch, (void *)&blocksize_bits);
119 printk("Getinfo call to drive failed (blocksize_bits)\n");
123 error = sbi->osi_ops->o_get_info(sbi->osi_conn_info.conn_id,
126 &scratch, (void *)&root_ino);
128 printk("Getinfo call to drive failed (root_ino)\n");
134 sb->u.generic_sbp = sbi;
136 sb->s_blocksize = blocksize;
137 sb->s_blocksize_bits = (unsigned char)blocksize_bits;
138 sb->s_magic = OBDFS_SUPER_MAGIC;
139 sb->s_op = &obdfs_super_operations;
141 /* make root inode */
142 root = iget(sb, root_ino);
143 if (!root || is_bad_inode(root)) {
144 printk("OBDFS: bad iget for root\n");
151 printk("obdfs_read_super: rootinode is %ld dev %d\n",
152 root->i_ino, root->i_dev);
153 sb->s_root = d_alloc_root(root);
162 sbi->osi_super = NULL;
171 static void obdfs_put_super(struct super_block *sb)
173 struct obdfs_sb_info *sbi;
180 /* XXX flush stuff */
181 sbi = sb->u.generic_sbp;
182 sb->u.generic_sbp = NULL;
183 sbi->osi_ops->o_disconnect(sbi->osi_conn_info.conn_id);
184 sbi->osi_super = NULL;
187 printk("OBDFS: Bye bye.\n");
188 memset(sbi, 0, sizeof(* sbi));
194 extern struct inode_operations obdfs_inode_ops;
196 /* all filling in of inodes postponed until lookup */
197 static void obdfs_read_inode(struct inode *inode)
200 struct obdfs_sb_info *sbi = inode->i_sb->u.generic_sbp;
203 error = sbi->osi_ops->o_getattr(sbi->osi_conn_info.conn_id,
204 inode->i_ino, inode);
206 printk("obdfs_read_inode: ibd_getattr fails (%d)\n", error);
210 inode->i_op = &obdfs_inode_ops;
214 static void obdfs_write_inode(struct inode *inode)
216 struct obdfs_sb_info *sbi;
219 sbi = inode->i_sb->u.generic_sbp;
220 error = sbi->osi_ops->o_setattr(sbi->osi_conn_info.conn_id,
221 inode->i_ino, inode);
223 printk("obdfs_write_inode: ibd_setattr fails (%d)\n", error);
230 static void obdfs_delete_inode(struct inode *inode)
232 struct obdfs_sb_info *sbi;
236 sbi = inode->i_sb->u.generic_sbp;
237 error = sbi->osi_ops->o_destroy(sbi->osi_conn_info.conn_id,
240 printk("obdfs_delete_node: ibd_destroy fails (%d)\n", error);
247 static int obdfs_notify_change(struct dentry *de, struct iattr *iattr)
249 struct inode *inode = de->d_inode;
250 struct iattr saved_copy;
251 struct obdfs_sb_info * sbi;
255 inode_to_iattr(inode, &saved_copy);
257 sbi = inode->i_sb->u.generic_sbp;
258 inode_setattr(inode, iattr);
259 error = sbi->osi_ops->o_setattr(sbi->osi_conn_info.conn_id,
260 inode->i_ino, inode);
262 inode_setattr(inode, &saved_copy);
263 printk("obdfs_notify_change: obd_setattr fails (%d)\n", error);
271 static int obdfs_statfs(struct super_block *sb, struct statfs *buf,
275 struct obdfs_sb_info * sbi;
280 sbi = sb->u.generic_sbp;
281 error = sbi->osi_ops->o_statfs(sbi->osi_conn_info.conn_id, &tmp);
283 printk("obdfs_notify_change: obd_statfs fails (%d)\n", error);
286 copy_to_user(buf, &tmp, (bufsize<sizeof(tmp)) ? bufsize : sizeof(tmp));
293 struct file_system_type obdfs_fs_type = {
294 "obdfs", 0, obdfs_read_super, NULL
299 printk(KERN_INFO "OBDFS v0.1, braam@stelias.com\n");
303 obd_sbi = &obdfs_super_info;
304 obd_fso = &obdfs_file_ops;
306 return register_filesystem(&obdfs_fs_type);
311 int init_module(void)
316 void cleanup_module(void)
320 obdfs_sysctl_clean();
321 unregister_filesystem(&obdfs_fs_type);
323 void obdfs_psdev_dec_use_count(void)
328 EXPORT_SYMBOL(obdfs_psdev_dec_use_count);