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Btrfs: Implement mknod

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Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Josef Bacik 2007-07-11 10:18:17 -04:00 committed by David Woodhouse
parent a1f396304f
commit 618e21d595
1 changed files with 66 additions and 6 deletions
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72
fs/btrfs/inode.c
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@ -46,6 +46,7 @@ struct btrfs_iget_args {
static struct inode_operations btrfs_dir_inode_operations;
static struct inode_operations btrfs_symlink_inode_operations;
static struct inode_operations btrfs_dir_ro_inode_operations;
static struct inode_operations btrfs_special_inode_operations;
static struct inode_operations btrfs_file_inode_operations;
static struct address_space_operations btrfs_aops;
static struct address_space_operations btrfs_symlink_aops;
@ -75,6 +76,7 @@ void btrfs_read_locked_inode(struct inode *inode)
struct btrfs_root *root = BTRFS_I(inode)->root;
struct btrfs_key location;
u64 alloc_group_block;
u32 rdev;
int ret;
path = btrfs_alloc_path();
@ -104,6 +106,8 @@ void btrfs_read_locked_inode(struct inode *inode)
inode->i_ctime.tv_nsec = btrfs_timespec_nsec(&inode_item->ctime);
inode->i_blocks = btrfs_inode_nblocks(inode_item);
inode->i_generation = btrfs_inode_generation(inode_item);
inode->i_rdev = 0;
rdev = btrfs_inode_rdev(inode_item);
alloc_group_block = btrfs_inode_block_group(inode_item);
BTRFS_I(inode)->block_group = btrfs_lookup_block_group(root->fs_info,
alloc_group_block);
@ -114,12 +118,6 @@ void btrfs_read_locked_inode(struct inode *inode)
mutex_unlock(&root->fs_info->fs_mutex);
switch (inode->i_mode & S_IFMT) {
#if 0
default:
init_special_inode(inode, inode->i_mode,
btrfs_inode_rdev(inode_item));
break;
#endif
case S_IFREG:
inode->i_mapping->a_ops = &btrfs_aops;
inode->i_fop = &btrfs_file_operations;
@ -136,6 +134,9 @@ void btrfs_read_locked_inode(struct inode *inode)
inode->i_op = &btrfs_symlink_inode_operations;
inode->i_mapping->a_ops = &btrfs_symlink_aops;
break;
default:
init_special_inode(inode, inode->i_mode, rdev);
break;
}
return;
@ -162,6 +163,7 @@ static void fill_inode_item(struct btrfs_inode_item *item,
btrfs_set_timespec_nsec(&item->ctime, inode->i_ctime.tv_nsec);
btrfs_set_inode_nblocks(item, inode->i_blocks);
btrfs_set_inode_generation(item, inode->i_generation);
btrfs_set_inode_rdev(item, inode->i_rdev);
btrfs_set_inode_block_group(item,
BTRFS_I(inode)->block_group->key.objectid);
}
@ -1070,6 +1072,58 @@ static int btrfs_add_nondir(struct btrfs_trans_handle *trans,
return err;
}
static int btrfs_mknod(struct inode *dir, struct dentry *dentry,
int mode, dev_t rdev)
{
struct btrfs_trans_handle *trans;
struct btrfs_root *root = BTRFS_I(dir)->root;
struct inode *inode;
int err;
int drop_inode = 0;
u64 objectid;
if (!new_valid_dev(rdev))
return -EINVAL;
mutex_lock(&root->fs_info->fs_mutex);
trans = btrfs_start_transaction(root, 1);
btrfs_set_trans_block_group(trans, dir);
err = btrfs_find_free_objectid(trans, root, dir->i_ino, &objectid);
if (err) {
err = -ENOSPC;
goto out_unlock;
}
inode = btrfs_new_inode(trans, root, objectid,
BTRFS_I(dir)->block_group, mode);
err = PTR_ERR(inode);
if (IS_ERR(inode))
goto out_unlock;
btrfs_set_trans_block_group(trans, inode);
err = btrfs_add_nondir(trans, dentry, inode);
if (err)
drop_inode = 1;
else {
inode->i_op = &btrfs_special_inode_operations;
init_special_inode(inode, inode->i_mode, rdev);
}
dir->i_sb->s_dirt = 1;
btrfs_update_inode_block_group(trans, inode);
btrfs_update_inode_block_group(trans, dir);
out_unlock:
btrfs_end_transaction(trans, root);
mutex_unlock(&root->fs_info->fs_mutex);
if (drop_inode) {
inode_dec_link_count(inode);
iput(inode);
}
btrfs_btree_balance_dirty(root);
return err;
}
static int btrfs_create(struct inode *dir, struct dentry *dentry,
int mode, struct nameidata *nd)
{
@ -2526,6 +2580,7 @@ static struct inode_operations btrfs_dir_inode_operations = {
.rename = btrfs_rename,
.symlink = btrfs_symlink,
.setattr = btrfs_setattr,
.mknod = btrfs_mknod,
};
static struct inode_operations btrfs_dir_ro_inode_operations = {
@ -2562,6 +2617,11 @@ static struct inode_operations btrfs_file_inode_operations = {
.setattr = btrfs_setattr,
};
static struct inode_operations btrfs_special_inode_operations = {
.getattr = btrfs_getattr,
.setattr = btrfs_setattr,
};
static struct inode_operations btrfs_symlink_inode_operations = {
.readlink = generic_readlink,
.follow_link = page_follow_link_light,