Btrfs: split out ioctl.c
Split the ioctl handling out of inode.c into a file of it's own. Also fix up checkpatch.pl warnings for the moved code. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Christoph Hellwig
committed by
Chris Mason
Chris Mason
parent
9d2423c5c3
commit
f46b5a66b3
733
fs/btrfs/inode.c
733
fs/btrfs/inode.c
@@ -2667,114 +2667,17 @@ void btrfs_invalidate_dcache_root(struct btrfs_root *root, char *name,
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}
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}
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static int noinline create_subvol(struct btrfs_root *root, char *name,
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int namelen)
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int btrfs_create_subvol_root(struct btrfs_root *new_root,
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struct btrfs_trans_handle *trans, u64 new_dirid,
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struct btrfs_block_group_cache *block_group)
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{
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struct btrfs_trans_handle *trans;
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struct btrfs_key key;
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struct btrfs_root_item root_item;
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struct btrfs_inode_item *inode_item;
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struct extent_buffer *leaf;
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struct btrfs_root *new_root = root;
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struct inode *inode;
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struct inode *dir;
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int ret;
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int err;
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u64 objectid;
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u64 new_dirid = BTRFS_FIRST_FREE_OBJECTID;
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unsigned long nr = 1;
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mutex_lock(&root->fs_info->fs_mutex);
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ret = btrfs_check_free_space(root, 1, 0);
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if (ret)
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goto fail_commit;
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trans = btrfs_start_transaction(root, 1);
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BUG_ON(!trans);
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ret = btrfs_find_free_objectid(trans, root->fs_info->tree_root,
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0, &objectid);
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if (ret)
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goto fail;
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leaf = __btrfs_alloc_free_block(trans, root, root->leafsize,
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objectid, trans->transid, 0, 0,
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0, 0);
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if (IS_ERR(leaf))
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return PTR_ERR(leaf);
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btrfs_set_header_nritems(leaf, 0);
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btrfs_set_header_level(leaf, 0);
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btrfs_set_header_bytenr(leaf, leaf->start);
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btrfs_set_header_generation(leaf, trans->transid);
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btrfs_set_header_owner(leaf, objectid);
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write_extent_buffer(leaf, root->fs_info->fsid,
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(unsigned long)btrfs_header_fsid(leaf),
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BTRFS_FSID_SIZE);
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btrfs_mark_buffer_dirty(leaf);
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inode_item = &root_item.inode;
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memset(inode_item, 0, sizeof(*inode_item));
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inode_item->generation = cpu_to_le64(1);
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inode_item->size = cpu_to_le64(3);
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inode_item->nlink = cpu_to_le32(1);
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inode_item->nblocks = cpu_to_le64(1);
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inode_item->mode = cpu_to_le32(S_IFDIR | 0755);
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btrfs_set_root_bytenr(&root_item, leaf->start);
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btrfs_set_root_level(&root_item, 0);
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btrfs_set_root_refs(&root_item, 1);
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btrfs_set_root_used(&root_item, 0);
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memset(&root_item.drop_progress, 0, sizeof(root_item.drop_progress));
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root_item.drop_level = 0;
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free_extent_buffer(leaf);
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leaf = NULL;
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btrfs_set_root_dirid(&root_item, new_dirid);
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key.objectid = objectid;
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key.offset = 1;
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btrfs_set_key_type(&key, BTRFS_ROOT_ITEM_KEY);
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ret = btrfs_insert_root(trans, root->fs_info->tree_root, &key,
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&root_item);
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if (ret)
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goto fail;
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/*
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* insert the directory item
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*/
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key.offset = (u64)-1;
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dir = root->fs_info->sb->s_root->d_inode;
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ret = btrfs_insert_dir_item(trans, root->fs_info->tree_root,
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name, namelen, dir->i_ino, &key,
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BTRFS_FT_DIR);
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if (ret)
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goto fail;
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ret = btrfs_insert_inode_ref(trans, root->fs_info->tree_root,
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name, namelen, objectid,
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root->fs_info->sb->s_root->d_inode->i_ino);
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if (ret)
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goto fail;
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ret = btrfs_commit_transaction(trans, root);
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if (ret)
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goto fail_commit;
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new_root = btrfs_read_fs_root(root->fs_info, &key, name, namelen);
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BUG_ON(!new_root);
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trans = btrfs_start_transaction(new_root, 1);
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BUG_ON(!trans);
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inode = btrfs_new_inode(trans, new_root, "..", 2, new_dirid,
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new_dirid,
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BTRFS_I(dir)->block_group, S_IFDIR | 0700);
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new_dirid, block_group, S_IFDIR | 0700);
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if (IS_ERR(inode))
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goto fail;
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return PTR_ERR(inode);
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inode->i_op = &btrfs_dir_inode_operations;
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inode->i_fop = &btrfs_dir_file_operations;
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new_root->inode = inode;
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@@ -2783,67 +2686,8 @@ static int noinline create_subvol(struct btrfs_root *root, char *name,
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new_dirid);
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inode->i_nlink = 1;
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inode->i_size = 0;
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ret = btrfs_update_inode(trans, new_root, inode);
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if (ret)
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goto fail;
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/* Invalidate existing dcache entry for new subvolume. */
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btrfs_invalidate_dcache_root(root, name, namelen);
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fail:
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nr = trans->blocks_used;
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err = btrfs_commit_transaction(trans, new_root);
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if (err && !ret)
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ret = err;
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fail_commit:
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mutex_unlock(&root->fs_info->fs_mutex);
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btrfs_btree_balance_dirty(root, nr);
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btrfs_throttle(root);
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return ret;
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}
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static int create_snapshot(struct btrfs_root *root, char *name, int namelen)
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{
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struct btrfs_pending_snapshot *pending_snapshot;
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struct btrfs_trans_handle *trans;
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int ret;
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int err;
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unsigned long nr = 0;
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if (!root->ref_cows)
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return -EINVAL;
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mutex_lock(&root->fs_info->fs_mutex);
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ret = btrfs_check_free_space(root, 1, 0);
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if (ret)
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goto fail_unlock;
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pending_snapshot = kmalloc(sizeof(*pending_snapshot), GFP_NOFS);
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if (!pending_snapshot) {
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ret = -ENOMEM;
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goto fail_unlock;
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}
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pending_snapshot->name = kmalloc(namelen + 1, GFP_NOFS);
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if (!pending_snapshot->name) {
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ret = -ENOMEM;
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kfree(pending_snapshot);
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goto fail_unlock;
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}
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memcpy(pending_snapshot->name, name, namelen);
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pending_snapshot->name[namelen] = '\0';
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trans = btrfs_start_transaction(root, 1);
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BUG_ON(!trans);
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pending_snapshot->root = root;
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list_add(&pending_snapshot->list,
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&trans->transaction->pending_snapshots);
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ret = btrfs_update_inode(trans, root, root->inode);
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err = btrfs_commit_transaction(trans, root);
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fail_unlock:
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mutex_unlock(&root->fs_info->fs_mutex);
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btrfs_btree_balance_dirty(root, nr);
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btrfs_throttle(root);
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return ret;
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return btrfs_update_inode(trans, new_root, inode);
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}
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unsigned long btrfs_force_ra(struct address_space *mapping,
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@@ -2861,571 +2705,6 @@ unsigned long btrfs_force_ra(struct address_space *mapping,
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#endif
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}
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int btrfs_defrag_file(struct file *file) {
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struct inode *inode = fdentry(file)->d_inode;
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struct btrfs_root *root = BTRFS_I(inode)->root;
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struct extent_io_tree *io_tree = &BTRFS_I(inode)->io_tree;
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struct page *page;
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unsigned long last_index;
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unsigned long ra_pages = root->fs_info->bdi.ra_pages;
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unsigned long total_read = 0;
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u64 page_start;
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u64 page_end;
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unsigned long i;
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int ret;
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mutex_lock(&root->fs_info->fs_mutex);
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ret = btrfs_check_free_space(root, inode->i_size, 0);
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mutex_unlock(&root->fs_info->fs_mutex);
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if (ret)
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return -ENOSPC;
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mutex_lock(&inode->i_mutex);
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last_index = inode->i_size >> PAGE_CACHE_SHIFT;
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for (i = 0; i <= last_index; i++) {
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if (total_read % ra_pages == 0) {
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btrfs_force_ra(inode->i_mapping, &file->f_ra, file, i,
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min(last_index, i + ra_pages - 1));
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}
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total_read++;
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page = grab_cache_page(inode->i_mapping, i);
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if (!page)
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goto out_unlock;
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if (!PageUptodate(page)) {
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btrfs_readpage(NULL, page);
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lock_page(page);
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if (!PageUptodate(page)) {
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unlock_page(page);
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page_cache_release(page);
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goto out_unlock;
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}
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}
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#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
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ClearPageDirty(page);
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#else
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cancel_dirty_page(page, PAGE_CACHE_SIZE);
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#endif
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wait_on_page_writeback(page);
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set_page_extent_mapped(page);
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page_start = (u64)page->index << PAGE_CACHE_SHIFT;
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page_end = page_start + PAGE_CACHE_SIZE - 1;
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lock_extent(io_tree, page_start, page_end, GFP_NOFS);
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set_extent_delalloc(io_tree, page_start,
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page_end, GFP_NOFS);
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unlock_extent(io_tree, page_start, page_end, GFP_NOFS);
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set_page_dirty(page);
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unlock_page(page);
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page_cache_release(page);
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balance_dirty_pages_ratelimited_nr(inode->i_mapping, 1);
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}
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out_unlock:
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mutex_unlock(&inode->i_mutex);
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return 0;
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}
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static int btrfs_ioctl_resize(struct btrfs_root *root, void __user *arg)
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{
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u64 new_size;
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u64 old_size;
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u64 devid = 1;
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struct btrfs_ioctl_vol_args *vol_args;
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struct btrfs_trans_handle *trans;
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struct btrfs_device *device = NULL;
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char *sizestr;
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char *devstr = NULL;
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int ret = 0;
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int namelen;
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int mod = 0;
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vol_args = kmalloc(sizeof(*vol_args), GFP_NOFS);
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if (!vol_args)
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return -ENOMEM;
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if (copy_from_user(vol_args, arg, sizeof(*vol_args))) {
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ret = -EFAULT;
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goto out;
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}
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namelen = strlen(vol_args->name);
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if (namelen > BTRFS_VOL_NAME_MAX) {
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ret = -EINVAL;
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goto out;
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}
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mutex_lock(&root->fs_info->fs_mutex);
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sizestr = vol_args->name;
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devstr = strchr(sizestr, ':');
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if (devstr) {
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char *end;
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sizestr = devstr + 1;
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*devstr = '\0';
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devstr = vol_args->name;
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devid = simple_strtoull(devstr, &end, 10);
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printk("resizing devid %Lu\n", devid);
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}
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device = btrfs_find_device(root, devid, NULL);
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if (!device) {
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printk("resizer unable to find device %Lu\n", devid);
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ret = -EINVAL;
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goto out_unlock;
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}
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if (!strcmp(sizestr, "max"))
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new_size = device->bdev->bd_inode->i_size;
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else {
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if (sizestr[0] == '-') {
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mod = -1;
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sizestr++;
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} else if (sizestr[0] == '+') {
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mod = 1;
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sizestr++;
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}
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new_size = btrfs_parse_size(sizestr);
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if (new_size == 0) {
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ret = -EINVAL;
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goto out_unlock;
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}
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}
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old_size = device->total_bytes;
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if (mod < 0) {
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if (new_size > old_size) {
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ret = -EINVAL;
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goto out_unlock;
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}
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new_size = old_size - new_size;
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} else if (mod > 0) {
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new_size = old_size + new_size;
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}
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if (new_size < 256 * 1024 * 1024) {
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ret = -EINVAL;
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goto out_unlock;
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}
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if (new_size > device->bdev->bd_inode->i_size) {
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ret = -EFBIG;
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goto out_unlock;
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}
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do_div(new_size, root->sectorsize);
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new_size *= root->sectorsize;
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printk("new size for %s is %llu\n", device->name, (unsigned long long)new_size);
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if (new_size > old_size) {
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trans = btrfs_start_transaction(root, 1);
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ret = btrfs_grow_device(trans, device, new_size);
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btrfs_commit_transaction(trans, root);
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} else {
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ret = btrfs_shrink_device(device, new_size);
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}
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out_unlock:
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mutex_unlock(&root->fs_info->fs_mutex);
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out:
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kfree(vol_args);
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return ret;
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}
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static int noinline btrfs_ioctl_snap_create(struct btrfs_root *root,
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void __user *arg)
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{
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struct btrfs_ioctl_vol_args *vol_args;
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struct btrfs_dir_item *di;
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struct btrfs_path *path;
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u64 root_dirid;
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int namelen;
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int ret;
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vol_args = kmalloc(sizeof(*vol_args), GFP_NOFS);
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if (!vol_args)
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return -ENOMEM;
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if (copy_from_user(vol_args, arg, sizeof(*vol_args))) {
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ret = -EFAULT;
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goto out;
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}
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namelen = strlen(vol_args->name);
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if (namelen > BTRFS_VOL_NAME_MAX) {
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ret = -EINVAL;
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goto out;
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}
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if (strchr(vol_args->name, '/')) {
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ret = -EINVAL;
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goto out;
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}
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path = btrfs_alloc_path();
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if (!path) {
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ret = -ENOMEM;
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goto out;
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}
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root_dirid = root->fs_info->sb->s_root->d_inode->i_ino,
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mutex_lock(&root->fs_info->fs_mutex);
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di = btrfs_lookup_dir_item(NULL, root->fs_info->tree_root,
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path, root_dirid,
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vol_args->name, namelen, 0);
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mutex_unlock(&root->fs_info->fs_mutex);
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btrfs_free_path(path);
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|
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if (di && !IS_ERR(di)) {
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ret = -EEXIST;
|
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goto out;
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}
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if (IS_ERR(di)) {
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ret = PTR_ERR(di);
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goto out;
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}
|
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|
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if (root == root->fs_info->tree_root)
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ret = create_subvol(root, vol_args->name, namelen);
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else
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ret = create_snapshot(root, vol_args->name, namelen);
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out:
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kfree(vol_args);
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return ret;
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}
|
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|
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static int btrfs_ioctl_defrag(struct file *file)
|
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{
|
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struct inode *inode = fdentry(file)->d_inode;
|
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struct btrfs_root *root = BTRFS_I(inode)->root;
|
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|
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switch (inode->i_mode & S_IFMT) {
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case S_IFDIR:
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mutex_lock(&root->fs_info->fs_mutex);
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btrfs_defrag_root(root, 0);
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btrfs_defrag_root(root->fs_info->extent_root, 0);
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mutex_unlock(&root->fs_info->fs_mutex);
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break;
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case S_IFREG:
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btrfs_defrag_file(file);
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break;
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}
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return 0;
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}
|
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|
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long btrfs_ioctl_add_dev(struct btrfs_root *root, void __user *arg)
|
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{
|
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struct btrfs_ioctl_vol_args *vol_args;
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int ret;
|
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|
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vol_args = kmalloc(sizeof(*vol_args), GFP_NOFS);
|
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|
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if (!vol_args)
|
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return -ENOMEM;
|
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|
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if (copy_from_user(vol_args, arg, sizeof(*vol_args))) {
|
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ret = -EFAULT;
|
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goto out;
|
||||
}
|
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ret = btrfs_init_new_device(root, vol_args->name);
|
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|
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out:
|
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kfree(vol_args);
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return ret;
|
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}
|
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|
||||
long btrfs_ioctl_rm_dev(struct btrfs_root *root, void __user *arg)
|
||||
{
|
||||
struct btrfs_ioctl_vol_args *vol_args;
|
||||
int ret;
|
||||
|
||||
vol_args = kmalloc(sizeof(*vol_args), GFP_NOFS);
|
||||
|
||||
if (!vol_args)
|
||||
return -ENOMEM;
|
||||
|
||||
if (copy_from_user(vol_args, arg, sizeof(*vol_args))) {
|
||||
ret = -EFAULT;
|
||||
goto out;
|
||||
}
|
||||
ret = btrfs_rm_device(root, vol_args->name);
|
||||
|
||||
out:
|
||||
kfree(vol_args);
|
||||
return ret;
|
||||
}
|
||||
|
||||
int dup_item_to_inode(struct btrfs_trans_handle *trans,
|
||||
struct btrfs_root *root,
|
||||
struct btrfs_path *path,
|
||||
struct extent_buffer *leaf,
|
||||
int slot,
|
||||
struct btrfs_key *key,
|
||||
u64 destino)
|
||||
{
|
||||
char *dup;
|
||||
int len = btrfs_item_size_nr(leaf, slot);
|
||||
struct btrfs_key ckey = *key;
|
||||
int ret = 0;
|
||||
|
||||
dup = kmalloc(len, GFP_NOFS);
|
||||
if (!dup)
|
||||
return -ENOMEM;
|
||||
|
||||
read_extent_buffer(leaf, dup, btrfs_item_ptr_offset(leaf, slot), len);
|
||||
btrfs_release_path(root, path);
|
||||
|
||||
ckey.objectid = destino;
|
||||
ret = btrfs_insert_item(trans, root, &ckey, dup, len);
|
||||
kfree(dup);
|
||||
return ret;
|
||||
}
|
||||
|
||||
long btrfs_ioctl_clone(struct file *file, unsigned long src_fd)
|
||||
{
|
||||
struct inode *inode = fdentry(file)->d_inode;
|
||||
struct btrfs_root *root = BTRFS_I(inode)->root;
|
||||
struct file *src_file;
|
||||
struct inode *src;
|
||||
struct btrfs_trans_handle *trans;
|
||||
int ret;
|
||||
u64 pos;
|
||||
struct btrfs_path *path;
|
||||
struct btrfs_key key;
|
||||
struct extent_buffer *leaf;
|
||||
u32 nritems;
|
||||
int slot;
|
||||
|
||||
src_file = fget(src_fd);
|
||||
if (!src_file)
|
||||
return -EBADF;
|
||||
src = src_file->f_dentry->d_inode;
|
||||
|
||||
ret = -EXDEV;
|
||||
if (src->i_sb != inode->i_sb)
|
||||
goto out_fput;
|
||||
|
||||
if (inode < src) {
|
||||
mutex_lock(&inode->i_mutex);
|
||||
mutex_lock(&src->i_mutex);
|
||||
} else {
|
||||
mutex_lock(&src->i_mutex);
|
||||
mutex_lock(&inode->i_mutex);
|
||||
}
|
||||
|
||||
ret = -ENOTEMPTY;
|
||||
if (inode->i_size)
|
||||
goto out_unlock;
|
||||
|
||||
/* do any pending delalloc/csum calc on src, one way or
|
||||
another, and lock file content */
|
||||
while (1) {
|
||||
filemap_write_and_wait(src->i_mapping);
|
||||
lock_extent(&BTRFS_I(src)->io_tree, 0, (u64)-1, GFP_NOFS);
|
||||
if (BTRFS_I(src)->delalloc_bytes == 0)
|
||||
break;
|
||||
unlock_extent(&BTRFS_I(src)->io_tree, 0, (u64)-1, GFP_NOFS);
|
||||
}
|
||||
|
||||
mutex_lock(&root->fs_info->fs_mutex);
|
||||
trans = btrfs_start_transaction(root, 0);
|
||||
path = btrfs_alloc_path();
|
||||
if (!path) {
|
||||
ret = -ENOMEM;
|
||||
goto out;
|
||||
}
|
||||
key.offset = 0;
|
||||
key.type = BTRFS_EXTENT_DATA_KEY;
|
||||
key.objectid = src->i_ino;
|
||||
pos = 0;
|
||||
path->reada = 2;
|
||||
|
||||
while (1) {
|
||||
/*
|
||||
* note the key will change type as we walk through the
|
||||
* tree.
|
||||
*/
|
||||
ret = btrfs_search_slot(trans, root, &key, path, 0, 0);
|
||||
if (ret < 0)
|
||||
goto out;
|
||||
|
||||
if (path->slots[0] >= btrfs_header_nritems(path->nodes[0])) {
|
||||
ret = btrfs_next_leaf(root, path);
|
||||
if (ret < 0)
|
||||
goto out;
|
||||
if (ret > 0)
|
||||
break;
|
||||
}
|
||||
leaf = path->nodes[0];
|
||||
slot = path->slots[0];
|
||||
btrfs_item_key_to_cpu(leaf, &key, slot);
|
||||
nritems = btrfs_header_nritems(leaf);
|
||||
|
||||
if (btrfs_key_type(&key) > BTRFS_CSUM_ITEM_KEY ||
|
||||
key.objectid != src->i_ino)
|
||||
break;
|
||||
|
||||
if (btrfs_key_type(&key) == BTRFS_EXTENT_DATA_KEY) {
|
||||
struct btrfs_file_extent_item *extent;
|
||||
int found_type;
|
||||
pos = key.offset;
|
||||
extent = btrfs_item_ptr(leaf, slot,
|
||||
struct btrfs_file_extent_item);
|
||||
found_type = btrfs_file_extent_type(leaf, extent);
|
||||
if (found_type == BTRFS_FILE_EXTENT_REG) {
|
||||
u64 len = btrfs_file_extent_num_bytes(leaf,
|
||||
extent);
|
||||
u64 ds = btrfs_file_extent_disk_bytenr(leaf,
|
||||
extent);
|
||||
u64 dl = btrfs_file_extent_disk_num_bytes(leaf,
|
||||
extent);
|
||||
u64 off = btrfs_file_extent_offset(leaf,
|
||||
extent);
|
||||
btrfs_insert_file_extent(trans, root,
|
||||
inode->i_ino, pos,
|
||||
ds, dl, len, off);
|
||||
/* ds == 0 means there's a hole */
|
||||
if (ds != 0) {
|
||||
btrfs_inc_extent_ref(trans, root,
|
||||
ds, dl,
|
||||
root->root_key.objectid,
|
||||
trans->transid,
|
||||
inode->i_ino, pos);
|
||||
}
|
||||
pos = key.offset + len;
|
||||
} else if (found_type == BTRFS_FILE_EXTENT_INLINE) {
|
||||
ret = dup_item_to_inode(trans, root, path,
|
||||
leaf, slot, &key,
|
||||
inode->i_ino);
|
||||
if (ret)
|
||||
goto out;
|
||||
pos = key.offset + btrfs_item_size_nr(leaf,
|
||||
slot);
|
||||
}
|
||||
} else if (btrfs_key_type(&key) == BTRFS_CSUM_ITEM_KEY) {
|
||||
ret = dup_item_to_inode(trans, root, path, leaf,
|
||||
slot, &key, inode->i_ino);
|
||||
|
||||
if (ret)
|
||||
goto out;
|
||||
}
|
||||
key.offset++;
|
||||
btrfs_release_path(root, path);
|
||||
}
|
||||
|
||||
ret = 0;
|
||||
out:
|
||||
btrfs_free_path(path);
|
||||
|
||||
inode->i_blocks = src->i_blocks;
|
||||
i_size_write(inode, src->i_size);
|
||||
btrfs_update_inode(trans, root, inode);
|
||||
|
||||
unlock_extent(&BTRFS_I(src)->io_tree, 0, (u64)-1, GFP_NOFS);
|
||||
|
||||
btrfs_end_transaction(trans, root);
|
||||
mutex_unlock(&root->fs_info->fs_mutex);
|
||||
|
||||
out_unlock:
|
||||
mutex_unlock(&src->i_mutex);
|
||||
mutex_unlock(&inode->i_mutex);
|
||||
out_fput:
|
||||
fput(src_file);
|
||||
return ret;
|
||||
}
|
||||
|
||||
/*
|
||||
* there are many ways the trans_start and trans_end ioctls can lead
|
||||
* to deadlocks. They should only be used by applications that
|
||||
* basically own the machine, and have a very in depth understanding
|
||||
* of all the possible deadlocks and enospc problems.
|
||||
*/
|
||||
long btrfs_ioctl_trans_start(struct file *file)
|
||||
{
|
||||
struct inode *inode = fdentry(file)->d_inode;
|
||||
struct btrfs_root *root = BTRFS_I(inode)->root;
|
||||
struct btrfs_trans_handle *trans;
|
||||
int ret = 0;
|
||||
|
||||
mutex_lock(&root->fs_info->fs_mutex);
|
||||
if (file->private_data) {
|
||||
ret = -EINPROGRESS;
|
||||
goto out;
|
||||
}
|
||||
trans = btrfs_start_transaction(root, 0);
|
||||
if (trans)
|
||||
file->private_data = trans;
|
||||
else
|
||||
ret = -ENOMEM;
|
||||
/*printk(KERN_INFO "btrfs_ioctl_trans_start on %p\n", file);*/
|
||||
out:
|
||||
mutex_unlock(&root->fs_info->fs_mutex);
|
||||
return ret;
|
||||
}
|
||||
|
||||
/*
|
||||
* there are many ways the trans_start and trans_end ioctls can lead
|
||||
* to deadlocks. They should only be used by applications that
|
||||
* basically own the machine, and have a very in depth understanding
|
||||
* of all the possible deadlocks and enospc problems.
|
||||
*/
|
||||
long btrfs_ioctl_trans_end(struct file *file)
|
||||
{
|
||||
struct inode *inode = fdentry(file)->d_inode;
|
||||
struct btrfs_root *root = BTRFS_I(inode)->root;
|
||||
struct btrfs_trans_handle *trans;
|
||||
int ret = 0;
|
||||
|
||||
mutex_lock(&root->fs_info->fs_mutex);
|
||||
trans = file->private_data;
|
||||
if (!trans) {
|
||||
ret = -EINVAL;
|
||||
goto out;
|
||||
}
|
||||
btrfs_end_transaction(trans, root);
|
||||
file->private_data = 0;
|
||||
out:
|
||||
mutex_unlock(&root->fs_info->fs_mutex);
|
||||
return ret;
|
||||
}
|
||||
|
||||
long btrfs_ioctl(struct file *file, unsigned int
|
||||
cmd, unsigned long arg)
|
||||
{
|
||||
struct btrfs_root *root = BTRFS_I(fdentry(file)->d_inode)->root;
|
||||
|
||||
switch (cmd) {
|
||||
case BTRFS_IOC_SNAP_CREATE:
|
||||
return btrfs_ioctl_snap_create(root, (void __user *)arg);
|
||||
case BTRFS_IOC_DEFRAG:
|
||||
return btrfs_ioctl_defrag(file);
|
||||
case BTRFS_IOC_RESIZE:
|
||||
return btrfs_ioctl_resize(root, (void __user *)arg);
|
||||
case BTRFS_IOC_ADD_DEV:
|
||||
return btrfs_ioctl_add_dev(root, (void __user *)arg);
|
||||
case BTRFS_IOC_RM_DEV:
|
||||
return btrfs_ioctl_rm_dev(root, (void __user *)arg);
|
||||
case BTRFS_IOC_BALANCE:
|
||||
return btrfs_balance(root->fs_info->dev_root);
|
||||
case BTRFS_IOC_CLONE:
|
||||
return btrfs_ioctl_clone(file, arg);
|
||||
case BTRFS_IOC_TRANS_START:
|
||||
return btrfs_ioctl_trans_start(file);
|
||||
case BTRFS_IOC_TRANS_END:
|
||||
return btrfs_ioctl_trans_end(file);
|
||||
case BTRFS_IOC_SYNC:
|
||||
btrfs_sync_fs(file->f_dentry->d_sb, 1);
|
||||
return 0;
|
||||
}
|
||||
|
||||
return -ENOTTY;
|
||||
}
|
||||
|
||||
/*
|
||||
* Called inside transaction, so use GFP_NOFS
|
||||
*/
|
||||
struct inode *btrfs_alloc_inode(struct super_block *sb)
|
||||
{
|
||||
struct btrfs_inode *ei;
|
||||
|
||||
Reference in New Issue
Block a user