mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-05 02:19:51 +00:00
Btrfs: Implement mknod
Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
parent
a1f396304f
commit
618e21d595
1 changed files with 66 additions and 6 deletions
|
@ -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,
|
||||
|
|
Loading…
Reference in a new issue