#include <linux/namei.h>
#include <linux/miscdevice.h>
#include <linux/version.h>
+#include <linux/magic.h>
#include "compat.h"
#include "ctree.h"
#include "disk-io.h"
#include "export.h"
#include "compression.h"
-#define BTRFS_SUPER_MAGIC 0x9123683E
static struct super_operations btrfs_super_ops;
-static void btrfs_put_super (struct super_block * sb)
+static void btrfs_put_super(struct super_block *sb)
{
struct btrfs_root *root = btrfs_sb(sb);
int ret;
ret = close_ctree(root);
- if (ret) {
- printk("close ctree returns %d\n", ret);
- }
-#if 0
- btrfs_sysfs_del_super(root->fs_info);
-#endif
sb->s_fs_info = NULL;
}
return error;
}
-static int btrfs_fill_super(struct super_block * sb,
+static int btrfs_fill_super(struct super_block *sb,
struct btrfs_fs_devices *fs_devices,
- void * data, int silent)
+ void *data, int silent)
{
- struct inode * inode;
- struct dentry * root_dentry;
+ struct inode *inode;
+ struct dentry *root_dentry;
struct btrfs_super_block *disk_super;
struct btrfs_root *tree_root;
struct btrfs_inode *bi;
root = dget(s->s_root);
else {
mutex_lock(&s->s_root->d_inode->i_mutex);
- root = lookup_one_len(subvol_name, s->s_root, strlen(subvol_name));
+ root = lookup_one_len(subvol_name, s->s_root,
+ strlen(subvol_name));
mutex_unlock(&s->s_root->d_inode->i_mutex);
+
if (IS_ERR(root)) {
up_write(&s->s_umount);
deactivate_super(s);
buf->f_bavail = buf->f_bfree;
buf->f_bsize = dentry->d_sb->s_blocksize;
buf->f_type = BTRFS_SUPER_MAGIC;
+
/* We treat it as constant endianness (it doesn't matter _which_)
- because we want the fsid to come out the same whether mounted
+ because we want the fsid to come out the same whether mounted
on a big-endian or little-endian host */
buf->f_fsid.val[0] = be32_to_cpu(fsid[0]) ^ be32_to_cpu(fsid[2]);
buf->f_fsid.val[1] = be32_to_cpu(fsid[1]) ^ be32_to_cpu(fsid[3]);
{
struct btrfs_ioctl_vol_args *vol;
struct btrfs_fs_devices *fs_devices;
- int ret = 0;
+ int ret = -ENOTTY;
int len;
if (!capable(CAP_SYS_ADMIN))
goto out;
}
len = strnlen(vol->name, BTRFS_PATH_NAME_MAX);
+
switch (cmd) {
case BTRFS_IOC_SCAN_DEV:
ret = btrfs_scan_one_device(vol->name, FMODE_READ,
return ret;
}
-static void btrfs_write_super_lockfs(struct super_block *sb)
+static int btrfs_freeze(struct super_block *sb)
{
struct btrfs_root *root = btrfs_sb(sb);
mutex_lock(&root->fs_info->transaction_kthread_mutex);
mutex_lock(&root->fs_info->cleaner_mutex);
+ return 0;
}
-static void btrfs_unlockfs(struct super_block *sb)
+static int btrfs_unfreeze(struct super_block *sb)
{
struct btrfs_root *root = btrfs_sb(sb);
mutex_unlock(&root->fs_info->cleaner_mutex);
mutex_unlock(&root->fs_info->transaction_kthread_mutex);
+ return 0;
}
static struct super_operations btrfs_super_ops = {
.destroy_inode = btrfs_destroy_inode,
.statfs = btrfs_statfs,
.remount_fs = btrfs_remount,
- .write_super_lockfs = btrfs_write_super_lockfs,
- .unlockfs = btrfs_unlockfs,
+ .freeze_fs = btrfs_freeze,
+ .unfreeze_fs = btrfs_unfreeze,
};
static const struct file_operations btrfs_ctl_fops = {
static void btrfs_interface_exit(void)
{
if (misc_deregister(&btrfs_misc) < 0)
- printk("misc_deregister failed for control device");
+ printk(KERN_INFO "misc_deregister failed for control device");
}
static int __init init_btrfs_fs(void)