#include <linux/buffer_head.h>
#include <linux/file.h>
#include <linux/fs.h>
+#include <linux/fsnotify.h>
#include <linux/pagemap.h>
#include <linux/highmem.h>
#include <linux/time.h>
#include <linux/init.h>
#include <linux/string.h>
-#include <linux/smp_lock.h>
#include <linux/backing-dev.h>
+#include <linux/mount.h>
#include <linux/mpage.h>
+#include <linux/namei.h>
#include <linux/swap.h>
#include <linux/writeback.h>
#include <linux/statfs.h>
#include <linux/compat.h>
#include <linux/bit_spinlock.h>
-#include <linux/version.h>
+#include <linux/security.h>
#include <linux/xattr.h>
+#include <linux/vmalloc.h>
+#include <linux/slab.h>
+#include "compat.h"
#include "ctree.h"
#include "disk-io.h"
#include "transaction.h"
#include "volumes.h"
#include "locking.h"
+/* Mask out flags that are inappropriate for the given type of inode. */
+static inline __u32 btrfs_mask_flags(umode_t mode, __u32 flags)
+{
+ if (S_ISDIR(mode))
+ return flags;
+ else if (S_ISREG(mode))
+ return flags & ~FS_DIRSYNC_FL;
+ else
+ return flags & (FS_NODUMP_FL | FS_NOATIME_FL);
+}
+
+/*
+ * Export inode flags to the format expected by the FS_IOC_GETFLAGS ioctl.
+ */
+static unsigned int btrfs_flags_to_ioctl(unsigned int flags)
+{
+ unsigned int iflags = 0;
+
+ if (flags & BTRFS_INODE_SYNC)
+ iflags |= FS_SYNC_FL;
+ if (flags & BTRFS_INODE_IMMUTABLE)
+ iflags |= FS_IMMUTABLE_FL;
+ if (flags & BTRFS_INODE_APPEND)
+ iflags |= FS_APPEND_FL;
+ if (flags & BTRFS_INODE_NODUMP)
+ iflags |= FS_NODUMP_FL;
+ if (flags & BTRFS_INODE_NOATIME)
+ iflags |= FS_NOATIME_FL;
+ if (flags & BTRFS_INODE_DIRSYNC)
+ iflags |= FS_DIRSYNC_FL;
+
+ return iflags;
+}
+
+/*
+ * Update inode->i_flags based on the btrfs internal flags.
+ */
+void btrfs_update_iflags(struct inode *inode)
+{
+ struct btrfs_inode *ip = BTRFS_I(inode);
+
+ inode->i_flags &= ~(S_SYNC|S_APPEND|S_IMMUTABLE|S_NOATIME|S_DIRSYNC);
+
+ if (ip->flags & BTRFS_INODE_SYNC)
+ inode->i_flags |= S_SYNC;
+ if (ip->flags & BTRFS_INODE_IMMUTABLE)
+ inode->i_flags |= S_IMMUTABLE;
+ if (ip->flags & BTRFS_INODE_APPEND)
+ inode->i_flags |= S_APPEND;
+ if (ip->flags & BTRFS_INODE_NOATIME)
+ inode->i_flags |= S_NOATIME;
+ if (ip->flags & BTRFS_INODE_DIRSYNC)
+ inode->i_flags |= S_DIRSYNC;
+}
+
+/*
+ * Inherit flags from the parent inode.
+ *
+ * Unlike extN we don't have any flags we don't want to inherit currently.
+ */
+void btrfs_inherit_iflags(struct inode *inode, struct inode *dir)
+{
+ unsigned int flags;
+
+ if (!dir)
+ return;
+
+ flags = BTRFS_I(dir)->flags;
+
+ if (S_ISREG(inode->i_mode))
+ flags &= ~BTRFS_INODE_DIRSYNC;
+ else if (!S_ISDIR(inode->i_mode))
+ flags &= (BTRFS_INODE_NODUMP | BTRFS_INODE_NOATIME);
+
+ BTRFS_I(inode)->flags = flags;
+ btrfs_update_iflags(inode);
+}
+
+static int btrfs_ioctl_getflags(struct file *file, void __user *arg)
+{
+ struct btrfs_inode *ip = BTRFS_I(file->f_path.dentry->d_inode);
+ unsigned int flags = btrfs_flags_to_ioctl(ip->flags);
+
+ if (copy_to_user(arg, &flags, sizeof(flags)))
+ return -EFAULT;
+ return 0;
+}
+
+static int btrfs_ioctl_setflags(struct file *file, void __user *arg)
+{
+ struct inode *inode = file->f_path.dentry->d_inode;
+ struct btrfs_inode *ip = BTRFS_I(inode);
+ struct btrfs_root *root = ip->root;
+ struct btrfs_trans_handle *trans;
+ unsigned int flags, oldflags;
+ int ret;
+ if (copy_from_user(&flags, arg, sizeof(flags)))
+ return -EFAULT;
+
+ if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
+ FS_NOATIME_FL | FS_NODUMP_FL | \
+ FS_SYNC_FL | FS_DIRSYNC_FL))
+ return -EOPNOTSUPP;
+
+ if (!is_owner_or_cap(inode))
+ return -EACCES;
+
+ mutex_lock(&inode->i_mutex);
+
+ flags = btrfs_mask_flags(inode->i_mode, flags);
+ oldflags = btrfs_flags_to_ioctl(ip->flags);
+ if ((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL)) {
+ if (!capable(CAP_LINUX_IMMUTABLE)) {
+ ret = -EPERM;
+ goto out_unlock;
+ }
+ }
+
+ ret = mnt_want_write(file->f_path.mnt);
+ if (ret)
+ goto out_unlock;
+
+ if (flags & FS_SYNC_FL)
+ ip->flags |= BTRFS_INODE_SYNC;
+ else
+ ip->flags &= ~BTRFS_INODE_SYNC;
+ if (flags & FS_IMMUTABLE_FL)
+ ip->flags |= BTRFS_INODE_IMMUTABLE;
+ else
+ ip->flags &= ~BTRFS_INODE_IMMUTABLE;
+ if (flags & FS_APPEND_FL)
+ ip->flags |= BTRFS_INODE_APPEND;
+ else
+ ip->flags &= ~BTRFS_INODE_APPEND;
+ if (flags & FS_NODUMP_FL)
+ ip->flags |= BTRFS_INODE_NODUMP;
+ else
+ ip->flags &= ~BTRFS_INODE_NODUMP;
+ if (flags & FS_NOATIME_FL)
+ ip->flags |= BTRFS_INODE_NOATIME;
+ else
+ ip->flags &= ~BTRFS_INODE_NOATIME;
+ if (flags & FS_DIRSYNC_FL)
+ ip->flags |= BTRFS_INODE_DIRSYNC;
+ else
+ ip->flags &= ~BTRFS_INODE_DIRSYNC;
+
+
+ trans = btrfs_join_transaction(root, 1);
+ BUG_ON(!trans);
+
+ ret = btrfs_update_inode(trans, root, inode);
+ BUG_ON(ret);
+
+ btrfs_update_iflags(inode);
+ inode->i_ctime = CURRENT_TIME;
+ btrfs_end_transaction(trans, root);
+
+ mnt_drop_write(file->f_path.mnt);
+ out_unlock:
+ mutex_unlock(&inode->i_mutex);
+ return 0;
+}
+
+static int btrfs_ioctl_getversion(struct file *file, int __user *arg)
+{
+ struct inode *inode = file->f_path.dentry->d_inode;
+
+ return put_user(inode->i_generation, arg);
+}
-static noinline int create_subvol(struct btrfs_root *root, char *name,
- int namelen)
+static noinline int create_subvol(struct btrfs_root *root,
+ struct dentry *dentry,
+ char *name, int namelen)
{
struct btrfs_trans_handle *trans;
struct btrfs_key key;
struct btrfs_root_item root_item;
struct btrfs_inode_item *inode_item;
struct extent_buffer *leaf;
- struct btrfs_root *new_root = root;
- struct inode *dir;
+ struct btrfs_root *new_root;
+ struct inode *dir = dentry->d_parent->d_inode;
int ret;
int err;
u64 objectid;
u64 new_dirid = BTRFS_FIRST_FREE_OBJECTID;
- unsigned long nr = 1;
+ u64 index = 0;
- ret = btrfs_check_free_space(root, 1, 0);
- if (ret)
- goto fail_commit;
-
- trans = btrfs_start_transaction(root, 1);
- BUG_ON(!trans);
-
- ret = btrfs_find_free_objectid(trans, root->fs_info->tree_root,
+ ret = btrfs_find_free_objectid(NULL, root->fs_info->tree_root,
0, &objectid);
if (ret)
- goto fail;
+ return ret;
+ /*
+ * 1 - inode item
+ * 2 - refs
+ * 1 - root item
+ * 2 - dir items
+ */
+ trans = btrfs_start_transaction(root, 6);
+ if (IS_ERR(trans))
+ return PTR_ERR(trans);
leaf = btrfs_alloc_free_block(trans, root, root->leafsize,
- objectid, trans->transid, 0, 0,
- 0, 0);
+ 0, objectid, NULL, 0, 0, 0);
if (IS_ERR(leaf)) {
ret = PTR_ERR(leaf);
goto fail;
}
- btrfs_set_header_nritems(leaf, 0);
- btrfs_set_header_level(leaf, 0);
+ memset_extent_buffer(leaf, 0, 0, sizeof(struct btrfs_header));
btrfs_set_header_bytenr(leaf, leaf->start);
btrfs_set_header_generation(leaf, trans->transid);
+ btrfs_set_header_backref_rev(leaf, BTRFS_MIXED_BACKREF_REV);
btrfs_set_header_owner(leaf, objectid);
write_extent_buffer(leaf, root->fs_info->fsid,
(unsigned long)btrfs_header_fsid(leaf),
BTRFS_FSID_SIZE);
+ write_extent_buffer(leaf, root->fs_info->chunk_tree_uuid,
+ (unsigned long)btrfs_header_chunk_tree_uuid(leaf),
+ BTRFS_UUID_SIZE);
btrfs_mark_buffer_dirty(leaf);
inode_item = &root_item.inode;
inode_item->generation = cpu_to_le64(1);
inode_item->size = cpu_to_le64(3);
inode_item->nlink = cpu_to_le32(1);
- inode_item->nblocks = cpu_to_le64(1);
+ inode_item->nbytes = cpu_to_le64(root->leafsize);
inode_item->mode = cpu_to_le32(S_IFDIR | 0755);
btrfs_set_root_bytenr(&root_item, leaf->start);
+ btrfs_set_root_generation(&root_item, trans->transid);
btrfs_set_root_level(&root_item, 0);
btrfs_set_root_refs(&root_item, 1);
- btrfs_set_root_used(&root_item, 0);
+ btrfs_set_root_used(&root_item, leaf->len);
+ btrfs_set_root_last_snapshot(&root_item, 0);
memset(&root_item.drop_progress, 0, sizeof(root_item.drop_progress));
root_item.drop_level = 0;
btrfs_set_root_dirid(&root_item, new_dirid);
key.objectid = objectid;
- key.offset = 1;
+ key.offset = 0;
btrfs_set_key_type(&key, BTRFS_ROOT_ITEM_KEY);
ret = btrfs_insert_root(trans, root->fs_info->tree_root, &key,
&root_item);
if (ret)
goto fail;
+ key.offset = (u64)-1;
+ new_root = btrfs_read_fs_root_no_name(root->fs_info, &key);
+ BUG_ON(IS_ERR(new_root));
+
+ btrfs_record_root_in_trans(trans, new_root);
+
+ ret = btrfs_create_subvol_root(trans, new_root, new_dirid,
+ BTRFS_I(dir)->block_group);
/*
* insert the directory item
*/
- key.offset = (u64)-1;
- dir = root->fs_info->sb->s_root->d_inode;
- ret = btrfs_insert_dir_item(trans, root->fs_info->tree_root,
- name, namelen, dir->i_ino, &key,
- BTRFS_FT_DIR, 0);
- if (ret)
- goto fail;
+ ret = btrfs_set_inode_index(dir, &index);
+ BUG_ON(ret);
- ret = btrfs_insert_inode_ref(trans, root->fs_info->tree_root,
- name, namelen, objectid,
- root->fs_info->sb->s_root->d_inode->i_ino, 0);
+ ret = btrfs_insert_dir_item(trans, root,
+ name, namelen, dir->i_ino, &key,
+ BTRFS_FT_DIR, index);
if (ret)
goto fail;
- ret = btrfs_commit_transaction(trans, root);
- if (ret)
- goto fail_commit;
-
- new_root = btrfs_read_fs_root(root->fs_info, &key, name, namelen);
- BUG_ON(!new_root);
-
- trans = btrfs_start_transaction(new_root, 1);
- BUG_ON(!trans);
+ btrfs_i_size_write(dir, dir->i_size + namelen * 2);
+ ret = btrfs_update_inode(trans, root, dir);
+ BUG_ON(ret);
- ret = btrfs_create_subvol_root(new_root, trans, new_dirid,
- BTRFS_I(dir)->block_group);
- if (ret)
- goto fail;
+ ret = btrfs_add_root_ref(trans, root->fs_info->tree_root,
+ objectid, root->root_key.objectid,
+ dir->i_ino, index, name, namelen);
- /* Invalidate existing dcache entry for new subvolume. */
- btrfs_invalidate_dcache_root(root, name, namelen);
+ BUG_ON(ret);
+ d_instantiate(dentry, btrfs_lookup_dentry(dir, dentry));
fail:
- nr = trans->blocks_used;
- err = btrfs_commit_transaction(trans, new_root);
+ err = btrfs_commit_transaction(trans, root);
if (err && !ret)
ret = err;
-fail_commit:
- btrfs_btree_balance_dirty(root, nr);
return ret;
}
-static int create_snapshot(struct btrfs_root *root, char *name, int namelen)
+static int create_snapshot(struct btrfs_root *root, struct dentry *dentry)
{
+ struct inode *inode;
struct btrfs_pending_snapshot *pending_snapshot;
struct btrfs_trans_handle *trans;
int ret;
- int err;
- unsigned long nr = 0;
if (!root->ref_cows)
return -EINVAL;
- ret = btrfs_check_free_space(root, 1, 0);
- if (ret)
- goto fail_unlock;
+ pending_snapshot = kzalloc(sizeof(*pending_snapshot), GFP_NOFS);
+ if (!pending_snapshot)
+ return -ENOMEM;
- pending_snapshot = kmalloc(sizeof(*pending_snapshot), GFP_NOFS);
- if (!pending_snapshot) {
- ret = -ENOMEM;
- goto fail_unlock;
- }
- pending_snapshot->name = kmalloc(namelen + 1, GFP_NOFS);
- if (!pending_snapshot->name) {
- ret = -ENOMEM;
- kfree(pending_snapshot);
- goto fail_unlock;
- }
- memcpy(pending_snapshot->name, name, namelen);
- pending_snapshot->name[namelen] = '\0';
- trans = btrfs_start_transaction(root, 1);
- BUG_ON(!trans);
+ btrfs_init_block_rsv(&pending_snapshot->block_rsv);
+ pending_snapshot->dentry = dentry;
pending_snapshot->root = root;
+
+ trans = btrfs_start_transaction(root->fs_info->extent_root, 5);
+ if (IS_ERR(trans)) {
+ ret = PTR_ERR(trans);
+ goto fail;
+ }
+
+ ret = btrfs_snap_reserve_metadata(trans, pending_snapshot);
+ BUG_ON(ret);
+
list_add(&pending_snapshot->list,
&trans->transaction->pending_snapshots);
- ret = btrfs_update_inode(trans, root, root->inode);
- err = btrfs_commit_transaction(trans, root);
+ ret = btrfs_commit_transaction(trans, root->fs_info->extent_root);
+ BUG_ON(ret);
+
+ ret = pending_snapshot->error;
+ if (ret)
+ goto fail;
+
+ btrfs_orphan_cleanup(pending_snapshot->snap);
+
+ inode = btrfs_lookup_dentry(dentry->d_parent->d_inode, dentry);
+ if (IS_ERR(inode)) {
+ ret = PTR_ERR(inode);
+ goto fail;
+ }
+ BUG_ON(!inode);
+ d_instantiate(dentry, inode);
+ ret = 0;
+fail:
+ kfree(pending_snapshot);
+ return ret;
+}
+
+/* copy of may_create in fs/namei.c() */
+static inline int btrfs_may_create(struct inode *dir, struct dentry *child)
+{
+ if (child->d_inode)
+ return -EEXIST;
+ if (IS_DEADDIR(dir))
+ return -ENOENT;
+ return inode_permission(dir, MAY_WRITE | MAY_EXEC);
+}
+
+/*
+ * Create a new subvolume below @parent. This is largely modeled after
+ * sys_mkdirat and vfs_mkdir, but we only do a single component lookup
+ * inside this filesystem so it's quite a bit simpler.
+ */
+static noinline int btrfs_mksubvol(struct path *parent,
+ char *name, int namelen,
+ struct btrfs_root *snap_src)
+{
+ struct inode *dir = parent->dentry->d_inode;
+ struct dentry *dentry;
+ int error;
+
+ mutex_lock_nested(&dir->i_mutex, I_MUTEX_PARENT);
+
+ dentry = lookup_one_len(name, parent->dentry, namelen);
+ error = PTR_ERR(dentry);
+ if (IS_ERR(dentry))
+ goto out_unlock;
+
+ error = -EEXIST;
+ if (dentry->d_inode)
+ goto out_dput;
+
+ error = mnt_want_write(parent->mnt);
+ if (error)
+ goto out_dput;
+
+ error = btrfs_may_create(dir, dentry);
+ if (error)
+ goto out_drop_write;
-fail_unlock:
- btrfs_btree_balance_dirty(root, nr);
+ down_read(&BTRFS_I(dir)->root->fs_info->subvol_sem);
+
+ if (btrfs_root_refs(&BTRFS_I(dir)->root->root_item) == 0)
+ goto out_up_read;
+
+ if (snap_src) {
+ error = create_snapshot(snap_src, dentry);
+ } else {
+ error = create_subvol(BTRFS_I(dir)->root, dentry,
+ name, namelen);
+ }
+ if (!error)
+ fsnotify_mkdir(dir, dentry);
+out_up_read:
+ up_read(&BTRFS_I(dir)->root->fs_info->subvol_sem);
+out_drop_write:
+ mnt_drop_write(parent->mnt);
+out_dput:
+ dput(dentry);
+out_unlock:
+ mutex_unlock(&dir->i_mutex);
+ return error;
+}
+
+static int should_defrag_range(struct inode *inode, u64 start, u64 len,
+ int thresh, u64 *last_len, u64 *skip,
+ u64 *defrag_end)
+{
+ struct extent_io_tree *io_tree = &BTRFS_I(inode)->io_tree;
+ struct extent_map *em = NULL;
+ struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree;
+ int ret = 1;
+
+
+ if (thresh == 0)
+ thresh = 256 * 1024;
+
+ /*
+ * make sure that once we start defragging and extent, we keep on
+ * defragging it
+ */
+ if (start < *defrag_end)
+ return 1;
+
+ *skip = 0;
+
+ /*
+ * hopefully we have this extent in the tree already, try without
+ * the full extent lock
+ */
+ read_lock(&em_tree->lock);
+ em = lookup_extent_mapping(em_tree, start, len);
+ read_unlock(&em_tree->lock);
+
+ if (!em) {
+ /* get the big lock and read metadata off disk */
+ lock_extent(io_tree, start, start + len - 1, GFP_NOFS);
+ em = btrfs_get_extent(inode, NULL, 0, start, len, 0);
+ unlock_extent(io_tree, start, start + len - 1, GFP_NOFS);
+
+ if (IS_ERR(em))
+ return 0;
+ }
+
+ /* this will cover holes, and inline extents */
+ if (em->block_start >= EXTENT_MAP_LAST_BYTE)
+ ret = 0;
+
+ /*
+ * we hit a real extent, if it is big don't bother defragging it again
+ */
+ if ((*last_len == 0 || *last_len >= thresh) && em->len >= thresh)
+ ret = 0;
+
+ /*
+ * last_len ends up being a counter of how many bytes we've defragged.
+ * every time we choose not to defrag an extent, we reset *last_len
+ * so that the next tiny extent will force a defrag.
+ *
+ * The end result of this is that tiny extents before a single big
+ * extent will force at least part of that big extent to be defragged.
+ */
+ if (ret) {
+ *last_len += len;
+ *defrag_end = extent_map_end(em);
+ } else {
+ *last_len = 0;
+ *skip = extent_map_end(em);
+ *defrag_end = 0;
+ }
+
+ free_extent_map(em);
return ret;
}
-int btrfs_defrag_file(struct file *file)
+static int btrfs_defrag_file(struct file *file,
+ struct btrfs_ioctl_defrag_range_args *range)
{
struct inode *inode = fdentry(file)->d_inode;
struct btrfs_root *root = BTRFS_I(inode)->root;
unsigned long total_read = 0;
u64 page_start;
u64 page_end;
+ u64 last_len = 0;
+ u64 skip = 0;
+ u64 defrag_end = 0;
unsigned long i;
int ret;
- ret = btrfs_check_free_space(root, inode->i_size, 0);
- if (ret)
- return -ENOSPC;
+ if (inode->i_size == 0)
+ return 0;
+
+ if (range->start + range->len > range->start) {
+ last_index = min_t(u64, inode->i_size - 1,
+ range->start + range->len - 1) >> PAGE_CACHE_SHIFT;
+ } else {
+ last_index = (inode->i_size - 1) >> PAGE_CACHE_SHIFT;
+ }
+
+ i = range->start >> PAGE_CACHE_SHIFT;
+ while (i <= last_index) {
+ if (!should_defrag_range(inode, (u64)i << PAGE_CACHE_SHIFT,
+ PAGE_CACHE_SIZE,
+ range->extent_thresh,
+ &last_len, &skip,
+ &defrag_end)) {
+ unsigned long next;
+ /*
+ * the should_defrag function tells us how much to skip
+ * bump our counter by the suggested amount
+ */
+ next = (skip + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
+ i = max(i + 1, next);
+ continue;
+ }
- mutex_lock(&inode->i_mutex);
- last_index = inode->i_size >> PAGE_CACHE_SHIFT;
- for (i = 0; i <= last_index; i++) {
if (total_read % ra_pages == 0) {
btrfs_force_ra(inode->i_mapping, &file->f_ra, file, i,
min(last_index, i + ra_pages - 1));
}
total_read++;
+ mutex_lock(&inode->i_mutex);
+ if (range->flags & BTRFS_DEFRAG_RANGE_COMPRESS)
+ BTRFS_I(inode)->force_compress = 1;
+
+ ret = btrfs_delalloc_reserve_space(inode, PAGE_CACHE_SIZE);
+ if (ret)
+ goto err_unlock;
again:
+ if (inode->i_size == 0 ||
+ i > ((inode->i_size - 1) >> PAGE_CACHE_SHIFT)) {
+ ret = 0;
+ goto err_reservations;
+ }
+
page = grab_cache_page(inode->i_mapping, i);
- if (!page)
- goto out_unlock;
+ if (!page) {
+ ret = -ENOMEM;
+ goto err_reservations;
+ }
+
if (!PageUptodate(page)) {
btrfs_readpage(NULL, page);
lock_page(page);
if (!PageUptodate(page)) {
unlock_page(page);
page_cache_release(page);
- goto out_unlock;
+ ret = -EIO;
+ goto err_reservations;
}
}
+ if (page->mapping != inode->i_mapping) {
+ unlock_page(page);
+ page_cache_release(page);
+ goto again;
+ }
+
wait_on_page_writeback(page);
+ if (PageDirty(page)) {
+ btrfs_delalloc_release_space(inode, PAGE_CACHE_SIZE);
+ goto loop_unlock;
+ }
+
page_start = (u64)page->index << PAGE_CACHE_SHIFT;
page_end = page_start + PAGE_CACHE_SIZE - 1;
lock_extent(io_tree, page_start, page_end, GFP_NOFS);
* page if it is dirtied again later
*/
clear_page_dirty_for_io(page);
+ clear_extent_bits(&BTRFS_I(inode)->io_tree, page_start,
+ page_end, EXTENT_DIRTY | EXTENT_DELALLOC |
+ EXTENT_DO_ACCOUNTING, GFP_NOFS);
- set_extent_delalloc(io_tree, page_start,
- page_end, GFP_NOFS);
-
- unlock_extent(io_tree, page_start, page_end, GFP_NOFS);
+ btrfs_set_extent_delalloc(inode, page_start, page_end, NULL);
+ ClearPageChecked(page);
set_page_dirty(page);
+ unlock_extent(io_tree, page_start, page_end, GFP_NOFS);
+
+loop_unlock:
unlock_page(page);
page_cache_release(page);
+ mutex_unlock(&inode->i_mutex);
+
balance_dirty_pages_ratelimited_nr(inode->i_mapping, 1);
+ i++;
+ }
+
+ if ((range->flags & BTRFS_DEFRAG_RANGE_START_IO))
+ filemap_flush(inode->i_mapping);
+
+ if ((range->flags & BTRFS_DEFRAG_RANGE_COMPRESS)) {
+ /* the filemap_flush will queue IO into the worker threads, but
+ * we have to make sure the IO is actually started and that
+ * ordered extents get created before we return
+ */
+ atomic_inc(&root->fs_info->async_submit_draining);
+ while (atomic_read(&root->fs_info->nr_async_submits) ||
+ atomic_read(&root->fs_info->async_delalloc_pages)) {
+ wait_event(root->fs_info->async_submit_wait,
+ (atomic_read(&root->fs_info->nr_async_submits) == 0 &&
+ atomic_read(&root->fs_info->async_delalloc_pages) == 0));
+ }
+ atomic_dec(&root->fs_info->async_submit_draining);
+
+ mutex_lock(&inode->i_mutex);
+ BTRFS_I(inode)->force_compress = 0;
+ mutex_unlock(&inode->i_mutex);
}
-out_unlock:
- mutex_unlock(&inode->i_mutex);
return 0;
-}
-/*
- * Called inside transaction, so use GFP_NOFS
- */
+err_reservations:
+ btrfs_delalloc_release_space(inode, PAGE_CACHE_SIZE);
+err_unlock:
+ mutex_unlock(&inode->i_mutex);
+ return ret;
+}
-static int btrfs_ioctl_resize(struct btrfs_root *root, void __user *arg)
+static noinline int btrfs_ioctl_resize(struct btrfs_root *root,
+ void __user *arg)
{
u64 new_size;
u64 old_size;
int namelen;
int mod = 0;
- vol_args = kmalloc(sizeof(*vol_args), GFP_NOFS);
+ if (root->fs_info->sb->s_flags & MS_RDONLY)
+ return -EROFS;
- if (!vol_args)
- return -ENOMEM;
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
- if (copy_from_user(vol_args, arg, sizeof(*vol_args))) {
- ret = -EFAULT;
- goto out;
- }
+ vol_args = memdup_user(arg, sizeof(*vol_args));
+ if (IS_ERR(vol_args))
+ return PTR_ERR(vol_args);
vol_args->name[BTRFS_PATH_NAME_MAX] = '\0';
namelen = strlen(vol_args->name);
*devstr = '\0';
devstr = vol_args->name;
devid = simple_strtoull(devstr, &end, 10);
- printk(KERN_INFO "resizing devid %llu\n", devid);
+ printk(KERN_INFO "resizing devid %llu\n",
+ (unsigned long long)devid);
}
- device = btrfs_find_device(root, devid, NULL);
+ device = btrfs_find_device(root, devid, NULL, NULL);
if (!device) {
- printk(KERN_INFO "resizer unable to find device %llu\n", devid);
+ printk(KERN_INFO "resizer unable to find device %llu\n",
+ (unsigned long long)devid);
ret = -EINVAL;
goto out_unlock;
}
mod = 1;
sizestr++;
}
- new_size = btrfs_parse_size(sizestr);
+ new_size = memparse(sizestr, NULL);
if (new_size == 0) {
ret = -EINVAL;
goto out_unlock;
device->name, (unsigned long long)new_size);
if (new_size > old_size) {
- trans = btrfs_start_transaction(root, 1);
+ trans = btrfs_start_transaction(root, 0);
ret = btrfs_grow_device(trans, device, new_size);
btrfs_commit_transaction(trans, root);
} else {
out_unlock:
mutex_unlock(&root->fs_info->volume_mutex);
-out:
kfree(vol_args);
return ret;
}
-static noinline int btrfs_ioctl_snap_create(struct btrfs_root *root,
- void __user *arg)
+static noinline int btrfs_ioctl_snap_create(struct file *file,
+ void __user *arg, int subvol)
{
+ struct btrfs_root *root = BTRFS_I(fdentry(file)->d_inode)->root;
struct btrfs_ioctl_vol_args *vol_args;
- struct btrfs_dir_item *di;
- struct btrfs_path *path;
- u64 root_dirid;
+ struct file *src_file;
int namelen;
- int ret;
-
- vol_args = kmalloc(sizeof(*vol_args), GFP_NOFS);
+ int ret = 0;
- if (!vol_args)
- return -ENOMEM;
+ if (root->fs_info->sb->s_flags & MS_RDONLY)
+ return -EROFS;
- if (copy_from_user(vol_args, arg, sizeof(*vol_args))) {
- ret = -EFAULT;
- goto out;
- }
+ vol_args = memdup_user(arg, sizeof(*vol_args));
+ if (IS_ERR(vol_args))
+ return PTR_ERR(vol_args);
vol_args->name[BTRFS_PATH_NAME_MAX] = '\0';
namelen = strlen(vol_args->name);
goto out;
}
- path = btrfs_alloc_path();
- if (!path) {
- ret = -ENOMEM;
- goto out;
+ if (subvol) {
+ ret = btrfs_mksubvol(&file->f_path, vol_args->name, namelen,
+ NULL);
+ } else {
+ struct inode *src_inode;
+ src_file = fget(vol_args->fd);
+ if (!src_file) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ src_inode = src_file->f_path.dentry->d_inode;
+ if (src_inode->i_sb != file->f_path.dentry->d_inode->i_sb) {
+ printk(KERN_INFO "btrfs: Snapshot src from "
+ "another FS\n");
+ ret = -EINVAL;
+ fput(src_file);
+ goto out;
+ }
+ ret = btrfs_mksubvol(&file->f_path, vol_args->name, namelen,
+ BTRFS_I(src_inode)->root);
+ fput(src_file);
}
+out:
+ kfree(vol_args);
+ return ret;
+}
- root_dirid = root->fs_info->sb->s_root->d_inode->i_ino,
- di = btrfs_lookup_dir_item(NULL, root->fs_info->tree_root,
- path, root_dirid,
- vol_args->name, namelen, 0);
- btrfs_free_path(path);
+/*
+ * helper to check if the subvolume references other subvolumes
+ */
+static noinline int may_destroy_subvol(struct btrfs_root *root)
+{
+ struct btrfs_path *path;
+ struct btrfs_key key;
+ int ret;
- if (di && !IS_ERR(di)) {
- ret = -EEXIST;
- goto out;
- }
+ path = btrfs_alloc_path();
+ if (!path)
+ return -ENOMEM;
+
+ key.objectid = root->root_key.objectid;
+ key.type = BTRFS_ROOT_REF_KEY;
+ key.offset = (u64)-1;
- if (IS_ERR(di)) {
- ret = PTR_ERR(di);
+ ret = btrfs_search_slot(NULL, root->fs_info->tree_root,
+ &key, path, 0, 0);
+ if (ret < 0)
goto out;
- }
+ BUG_ON(ret == 0);
- mutex_lock(&root->fs_info->drop_mutex);
- if (root == root->fs_info->tree_root)
- ret = create_subvol(root, vol_args->name, namelen);
- else
- ret = create_snapshot(root, vol_args->name, namelen);
- mutex_unlock(&root->fs_info->drop_mutex);
+ ret = 0;
+ if (path->slots[0] > 0) {
+ path->slots[0]--;
+ btrfs_item_key_to_cpu(path->nodes[0], &key, path->slots[0]);
+ if (key.objectid == root->root_key.objectid &&
+ key.type == BTRFS_ROOT_REF_KEY)
+ ret = -ENOTEMPTY;
+ }
out:
- kfree(vol_args);
+ btrfs_free_path(path);
return ret;
}
-static int btrfs_ioctl_defrag(struct file *file)
+static noinline int key_in_sk(struct btrfs_key *key,
+ struct btrfs_ioctl_search_key *sk)
{
- struct inode *inode = fdentry(file)->d_inode;
- struct btrfs_root *root = BTRFS_I(inode)->root;
+ struct btrfs_key test;
+ int ret;
- switch (inode->i_mode & S_IFMT) {
- case S_IFDIR:
- btrfs_defrag_root(root, 0);
- btrfs_defrag_root(root->fs_info->extent_root, 0);
- break;
- case S_IFREG:
- btrfs_defrag_file(file);
- break;
+ test.objectid = sk->min_objectid;
+ test.type = sk->min_type;
+ test.offset = sk->min_offset;
+
+ ret = btrfs_comp_cpu_keys(key, &test);
+ if (ret < 0)
+ return 0;
+
+ test.objectid = sk->max_objectid;
+ test.type = sk->max_type;
+ test.offset = sk->max_offset;
+
+ ret = btrfs_comp_cpu_keys(key, &test);
+ if (ret > 0)
+ return 0;
+ return 1;
+}
+
+static noinline int copy_to_sk(struct btrfs_root *root,
+ struct btrfs_path *path,
+ struct btrfs_key *key,
+ struct btrfs_ioctl_search_key *sk,
+ char *buf,
+ unsigned long *sk_offset,
+ int *num_found)
+{
+ u64 found_transid;
+ struct extent_buffer *leaf;
+ struct btrfs_ioctl_search_header sh;
+ unsigned long item_off;
+ unsigned long item_len;
+ int nritems;
+ int i;
+ int slot;
+ int found = 0;
+ int ret = 0;
+
+ leaf = path->nodes[0];
+ slot = path->slots[0];
+ nritems = btrfs_header_nritems(leaf);
+
+ if (btrfs_header_generation(leaf) > sk->max_transid) {
+ i = nritems;
+ goto advance_key;
}
+ found_transid = btrfs_header_generation(leaf);
- return 0;
+ for (i = slot; i < nritems; i++) {
+ item_off = btrfs_item_ptr_offset(leaf, i);
+ item_len = btrfs_item_size_nr(leaf, i);
+
+ if (item_len > BTRFS_SEARCH_ARGS_BUFSIZE)
+ item_len = 0;
+
+ if (sizeof(sh) + item_len + *sk_offset >
+ BTRFS_SEARCH_ARGS_BUFSIZE) {
+ ret = 1;
+ goto overflow;
+ }
+
+ btrfs_item_key_to_cpu(leaf, key, i);
+ if (!key_in_sk(key, sk))
+ continue;
+
+ sh.objectid = key->objectid;
+ sh.offset = key->offset;
+ sh.type = key->type;
+ sh.len = item_len;
+ sh.transid = found_transid;
+
+ /* copy search result header */
+ memcpy(buf + *sk_offset, &sh, sizeof(sh));
+ *sk_offset += sizeof(sh);
+
+ if (item_len) {
+ char *p = buf + *sk_offset;
+ /* copy the item */
+ read_extent_buffer(leaf, p,
+ item_off, item_len);
+ *sk_offset += item_len;
+ }
+ found++;
+
+ if (*num_found >= sk->nr_items)
+ break;
+ }
+advance_key:
+ ret = 0;
+ if (key->offset < (u64)-1 && key->offset < sk->max_offset)
+ key->offset++;
+ else if (key->type < (u8)-1 && key->type < sk->max_type) {
+ key->offset = 0;
+ key->type++;
+ } else if (key->objectid < (u64)-1 && key->objectid < sk->max_objectid) {
+ key->offset = 0;
+ key->type = 0;
+ key->objectid++;
+ } else
+ ret = 1;
+overflow:
+ *num_found += found;
+ return ret;
}
-long btrfs_ioctl_add_dev(struct btrfs_root *root, void __user *arg)
+static noinline int search_ioctl(struct inode *inode,
+ struct btrfs_ioctl_search_args *args)
{
- struct btrfs_ioctl_vol_args *vol_args;
+ struct btrfs_root *root;
+ struct btrfs_key key;
+ struct btrfs_key max_key;
+ struct btrfs_path *path;
+ struct btrfs_ioctl_search_key *sk = &args->key;
+ struct btrfs_fs_info *info = BTRFS_I(inode)->root->fs_info;
int ret;
+ int num_found = 0;
+ unsigned long sk_offset = 0;
+
+ path = btrfs_alloc_path();
+ if (!path)
+ return -ENOMEM;
+
+ if (sk->tree_id == 0) {
+ /* search the root of the inode that was passed */
+ root = BTRFS_I(inode)->root;
+ } else {
+ key.objectid = sk->tree_id;
+ key.type = BTRFS_ROOT_ITEM_KEY;
+ key.offset = (u64)-1;
+ root = btrfs_read_fs_root_no_name(info, &key);
+ if (IS_ERR(root)) {
+ printk(KERN_ERR "could not find root %llu\n",
+ sk->tree_id);
+ btrfs_free_path(path);
+ return -ENOENT;
+ }
+ }
+
+ key.objectid = sk->min_objectid;
+ key.type = sk->min_type;
+ key.offset = sk->min_offset;
+
+ max_key.objectid = sk->max_objectid;
+ max_key.type = sk->max_type;
+ max_key.offset = sk->max_offset;
+
+ path->keep_locks = 1;
+
+ while(1) {
+ ret = btrfs_search_forward(root, &key, &max_key, path, 0,
+ sk->min_transid);
+ if (ret != 0) {
+ if (ret > 0)
+ ret = 0;
+ goto err;
+ }
+ ret = copy_to_sk(root, path, &key, sk, args->buf,
+ &sk_offset, &num_found);
+ btrfs_release_path(root, path);
+ if (ret || num_found >= sk->nr_items)
+ break;
+
+ }
+ ret = 0;
+err:
+ sk->nr_items = num_found;
+ btrfs_free_path(path);
+ return ret;
+}
+
+static noinline int btrfs_ioctl_tree_search(struct file *file,
+ void __user *argp)
+{
+ struct btrfs_ioctl_search_args *args;
+ struct inode *inode;
+ int ret;
- vol_args = kmalloc(sizeof(*vol_args), GFP_NOFS);
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
- if (!vol_args)
+ args = kmalloc(sizeof(*args), GFP_KERNEL);
+ if (!args)
return -ENOMEM;
- if (copy_from_user(vol_args, arg, sizeof(*vol_args))) {
+ if (copy_from_user(args, argp, sizeof(*args))) {
+ kfree(args);
+ return -EFAULT;
+ }
+ inode = fdentry(file)->d_inode;
+ ret = search_ioctl(inode, args);
+ if (ret == 0 && copy_to_user(argp, args, sizeof(*args)))
ret = -EFAULT;
+ kfree(args);
+ return ret;
+}
+
+/*
+ * Search INODE_REFs to identify path name of 'dirid' directory
+ * in a 'tree_id' tree. and sets path name to 'name'.
+ */
+static noinline int btrfs_search_path_in_tree(struct btrfs_fs_info *info,
+ u64 tree_id, u64 dirid, char *name)
+{
+ struct btrfs_root *root;
+ struct btrfs_key key;
+ char *ptr;
+ int ret = -1;
+ int slot;
+ int len;
+ int total_len = 0;
+ struct btrfs_inode_ref *iref;
+ struct extent_buffer *l;
+ struct btrfs_path *path;
+
+ if (dirid == BTRFS_FIRST_FREE_OBJECTID) {
+ name[0]='\0';
+ return 0;
+ }
+
+ path = btrfs_alloc_path();
+ if (!path)
+ return -ENOMEM;
+
+ ptr = &name[BTRFS_INO_LOOKUP_PATH_MAX];
+
+ key.objectid = tree_id;
+ key.type = BTRFS_ROOT_ITEM_KEY;
+ key.offset = (u64)-1;
+ root = btrfs_read_fs_root_no_name(info, &key);
+ if (IS_ERR(root)) {
+ printk(KERN_ERR "could not find root %llu\n", tree_id);
+ ret = -ENOENT;
goto out;
}
- vol_args->name[BTRFS_PATH_NAME_MAX] = '\0';
- ret = btrfs_init_new_device(root, vol_args->name);
+ key.objectid = dirid;
+ key.type = BTRFS_INODE_REF_KEY;
+ key.offset = (u64)-1;
+
+ while(1) {
+ ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
+ if (ret < 0)
+ goto out;
+
+ l = path->nodes[0];
+ slot = path->slots[0];
+ if (ret > 0 && slot > 0)
+ slot--;
+ btrfs_item_key_to_cpu(l, &key, slot);
+
+ if (ret > 0 && (key.objectid != dirid ||
+ key.type != BTRFS_INODE_REF_KEY)) {
+ ret = -ENOENT;
+ goto out;
+ }
+
+ iref = btrfs_item_ptr(l, slot, struct btrfs_inode_ref);
+ len = btrfs_inode_ref_name_len(l, iref);
+ ptr -= len + 1;
+ total_len += len + 1;
+ if (ptr < name)
+ goto out;
+
+ *(ptr + len) = '/';
+ read_extent_buffer(l, ptr,(unsigned long)(iref + 1), len);
+
+ if (key.offset == BTRFS_FIRST_FREE_OBJECTID)
+ break;
+
+ btrfs_release_path(root, path);
+ key.objectid = key.offset;
+ key.offset = (u64)-1;
+ dirid = key.objectid;
+
+ }
+ if (ptr < name)
+ goto out;
+ memcpy(name, ptr, total_len);
+ name[total_len]='\0';
+ ret = 0;
out:
- kfree(vol_args);
+ btrfs_free_path(path);
return ret;
}
-long btrfs_ioctl_rm_dev(struct btrfs_root *root, void __user *arg)
+static noinline int btrfs_ioctl_ino_lookup(struct file *file,
+ void __user *argp)
{
- struct btrfs_ioctl_vol_args *vol_args;
- int ret;
+ struct btrfs_ioctl_ino_lookup_args *args;
+ struct inode *inode;
+ int ret;
- vol_args = kmalloc(sizeof(*vol_args), GFP_NOFS);
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
- if (!vol_args)
+ args = kmalloc(sizeof(*args), GFP_KERNEL);
+ if (!args)
return -ENOMEM;
- if (copy_from_user(vol_args, arg, sizeof(*vol_args))) {
+ if (copy_from_user(args, argp, sizeof(*args))) {
+ kfree(args);
+ return -EFAULT;
+ }
+ inode = fdentry(file)->d_inode;
+
+ if (args->treeid == 0)
+ args->treeid = BTRFS_I(inode)->root->root_key.objectid;
+
+ ret = btrfs_search_path_in_tree(BTRFS_I(inode)->root->fs_info,
+ args->treeid, args->objectid,
+ args->name);
+
+ if (ret == 0 && copy_to_user(argp, args, sizeof(*args)))
ret = -EFAULT;
+
+ kfree(args);
+ return ret;
+}
+
+static noinline int btrfs_ioctl_snap_destroy(struct file *file,
+ void __user *arg)
+{
+ struct dentry *parent = fdentry(file);
+ struct dentry *dentry;
+ struct inode *dir = parent->d_inode;
+ struct inode *inode;
+ struct btrfs_root *root = BTRFS_I(dir)->root;
+ struct btrfs_root *dest = NULL;
+ struct btrfs_ioctl_vol_args *vol_args;
+ struct btrfs_trans_handle *trans;
+ int namelen;
+ int ret;
+ int err = 0;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ vol_args = memdup_user(arg, sizeof(*vol_args));
+ if (IS_ERR(vol_args))
+ return PTR_ERR(vol_args);
+
+ vol_args->name[BTRFS_PATH_NAME_MAX] = '\0';
+ namelen = strlen(vol_args->name);
+ if (strchr(vol_args->name, '/') ||
+ strncmp(vol_args->name, "..", namelen) == 0) {
+ err = -EINVAL;
goto out;
}
- vol_args->name[BTRFS_PATH_NAME_MAX] = '\0';
- ret = btrfs_rm_device(root, vol_args->name);
+ err = mnt_want_write(file->f_path.mnt);
+ if (err)
+ goto out;
+
+ mutex_lock_nested(&dir->i_mutex, I_MUTEX_PARENT);
+ dentry = lookup_one_len(vol_args->name, parent, namelen);
+ if (IS_ERR(dentry)) {
+ err = PTR_ERR(dentry);
+ goto out_unlock_dir;
+ }
+
+ if (!dentry->d_inode) {
+ err = -ENOENT;
+ goto out_dput;
+ }
+
+ inode = dentry->d_inode;
+ if (inode->i_ino != BTRFS_FIRST_FREE_OBJECTID) {
+ err = -EINVAL;
+ goto out_dput;
+ }
+
+ dest = BTRFS_I(inode)->root;
+
+ mutex_lock(&inode->i_mutex);
+ err = d_invalidate(dentry);
+ if (err)
+ goto out_unlock;
+
+ down_write(&root->fs_info->subvol_sem);
+
+ err = may_destroy_subvol(dest);
+ if (err)
+ goto out_up_write;
+
+ trans = btrfs_start_transaction(root, 0);
+ if (IS_ERR(trans)) {
+ err = PTR_ERR(trans);
+ goto out;
+ }
+ trans->block_rsv = &root->fs_info->global_block_rsv;
+
+ ret = btrfs_unlink_subvol(trans, root, dir,
+ dest->root_key.objectid,
+ dentry->d_name.name,
+ dentry->d_name.len);
+ BUG_ON(ret);
+
+ btrfs_record_root_in_trans(trans, dest);
+
+ memset(&dest->root_item.drop_progress, 0,
+ sizeof(dest->root_item.drop_progress));
+ dest->root_item.drop_level = 0;
+ btrfs_set_root_refs(&dest->root_item, 0);
+
+ ret = btrfs_insert_orphan_item(trans,
+ root->fs_info->tree_root,
+ dest->root_key.objectid);
+ BUG_ON(ret);
+
+ ret = btrfs_commit_transaction(trans, root);
+ BUG_ON(ret);
+ inode->i_flags |= S_DEAD;
+out_up_write:
+ up_write(&root->fs_info->subvol_sem);
+out_unlock:
+ mutex_unlock(&inode->i_mutex);
+ if (!err) {
+ shrink_dcache_sb(root->fs_info->sb);
+ btrfs_invalidate_inodes(dest);
+ d_delete(dentry);
+ }
+out_dput:
+ dput(dentry);
+out_unlock_dir:
+ mutex_unlock(&dir->i_mutex);
+ mnt_drop_write(file->f_path.mnt);
out:
kfree(vol_args);
+ return err;
+}
+
+static int btrfs_ioctl_defrag(struct file *file, void __user *argp)
+{
+ struct inode *inode = fdentry(file)->d_inode;
+ struct btrfs_root *root = BTRFS_I(inode)->root;
+ struct btrfs_ioctl_defrag_range_args *range;
+ int ret;
+
+ ret = mnt_want_write(file->f_path.mnt);
+ if (ret)
+ return ret;
+
+ switch (inode->i_mode & S_IFMT) {
+ case S_IFDIR:
+ if (!capable(CAP_SYS_ADMIN)) {
+ ret = -EPERM;
+ goto out;
+ }
+ ret = btrfs_defrag_root(root, 0);
+ if (ret)
+ goto out;
+ ret = btrfs_defrag_root(root->fs_info->extent_root, 0);
+ break;
+ case S_IFREG:
+ if (!(file->f_mode & FMODE_WRITE)) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ range = kzalloc(sizeof(*range), GFP_KERNEL);
+ if (!range) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ if (argp) {
+ if (copy_from_user(range, argp,
+ sizeof(*range))) {
+ ret = -EFAULT;
+ kfree(range);
+ goto out;
+ }
+ /* compression requires us to start the IO */
+ if ((range->flags & BTRFS_DEFRAG_RANGE_COMPRESS)) {
+ range->flags |= BTRFS_DEFRAG_RANGE_START_IO;
+ range->extent_thresh = (u32)-1;
+ }
+ } else {
+ /* the rest are all set to zero by kzalloc */
+ range->len = (u64)-1;
+ }
+ ret = btrfs_defrag_file(file, range);
+ kfree(range);
+ break;
+ default:
+ ret = -EINVAL;
+ }
+out:
+ mnt_drop_write(file->f_path.mnt);
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)
+static long btrfs_ioctl_add_dev(struct btrfs_root *root, void __user *arg)
{
- char *dup;
- int len = btrfs_item_size_nr(leaf, slot);
- struct btrfs_key ckey = *key;
- int ret = 0;
+ struct btrfs_ioctl_vol_args *vol_args;
+ int ret;
- dup = kmalloc(len, GFP_NOFS);
- if (!dup)
- return -ENOMEM;
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
- read_extent_buffer(leaf, dup, btrfs_item_ptr_offset(leaf, slot), len);
- btrfs_release_path(root, path);
+ vol_args = memdup_user(arg, sizeof(*vol_args));
+ if (IS_ERR(vol_args))
+ return PTR_ERR(vol_args);
+
+ vol_args->name[BTRFS_PATH_NAME_MAX] = '\0';
+ ret = btrfs_init_new_device(root, vol_args->name);
+
+ kfree(vol_args);
+ return ret;
+}
+
+static long btrfs_ioctl_rm_dev(struct btrfs_root *root, void __user *arg)
+{
+ struct btrfs_ioctl_vol_args *vol_args;
+ int ret;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ if (root->fs_info->sb->s_flags & MS_RDONLY)
+ return -EROFS;
+
+ vol_args = memdup_user(arg, sizeof(*vol_args));
+ if (IS_ERR(vol_args))
+ return PTR_ERR(vol_args);
+
+ vol_args->name[BTRFS_PATH_NAME_MAX] = '\0';
+ ret = btrfs_rm_device(root, vol_args->name);
- ckey.objectid = destino;
- ret = btrfs_insert_item(trans, root, &ckey, dup, len);
- kfree(dup);
+ kfree(vol_args);
return ret;
}
-long btrfs_ioctl_clone(struct file *file, unsigned long src_fd)
+static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd,
+ u64 off, u64 olen, u64 destoff)
{
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;
+ char *buf;
+ struct btrfs_key key;
u32 nritems;
int slot;
+ int ret;
+ u64 len = olen;
+ u64 bs = root->fs_info->sb->s_blocksize;
+ u64 hint_byte;
+
+ /*
+ * TODO:
+ * - split compressed inline extents. annoying: we need to
+ * decompress into destination's address_space (the file offset
+ * may change, so source mapping won't do), then recompress (or
+ * otherwise reinsert) a subrange.
+ * - allow ranges within the same file to be cloned (provided
+ * they don't overlap)?
+ */
+
+ /* the destination must be opened for writing */
+ if (!(file->f_mode & FMODE_WRITE))
+ return -EINVAL;
+
+ ret = mnt_want_write(file->f_path.mnt);
+ if (ret)
+ return ret;
+
+ src_file = fget(srcfd);
+ if (!src_file) {
+ ret = -EBADF;
+ goto out_drop_write;
+ }
- src_file = fget(src_fd);
- if (!src_file)
- return -EBADF;
src = src_file->f_dentry->d_inode;
+ ret = -EINVAL;
+ if (src == inode)
+ goto out_fput;
+
+ /* the src must be open for reading */
+ if (!(src_file->f_mode & FMODE_READ))
+ goto out_fput;
+
+ ret = -EISDIR;
+ if (S_ISDIR(src->i_mode) || S_ISDIR(inode->i_mode))
+ goto out_fput;
+
ret = -EXDEV;
- if (src->i_sb != inode->i_sb)
+ if (src->i_sb != inode->i_sb || BTRFS_I(src)->root != root)
+ goto out_fput;
+
+ ret = -ENOMEM;
+ buf = vmalloc(btrfs_level_size(root, 0));
+ if (!buf)
+ goto out_fput;
+
+ path = btrfs_alloc_path();
+ if (!path) {
+ vfree(buf);
goto out_fput;
+ }
+ path->reada = 2;
if (inode < src) {
mutex_lock(&inode->i_mutex);
mutex_lock(&inode->i_mutex);
}
- ret = -ENOTEMPTY;
- if (inode->i_size)
+ /* determine range to clone */
+ ret = -EINVAL;
+ if (off >= src->i_size || off + len > src->i_size)
+ goto out_unlock;
+ if (len == 0)
+ olen = len = src->i_size - off;
+ /* if we extend to eof, continue to block boundary */
+ if (off + len == src->i_size)
+ len = ((src->i_size + bs-1) & ~(bs-1))
+ - off;
+
+ /* verify the end result is block aligned */
+ if ((off & (bs-1)) ||
+ ((off + len) & (bs-1)))
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)
+ struct btrfs_ordered_extent *ordered;
+ lock_extent(&BTRFS_I(src)->io_tree, off, off+len, GFP_NOFS);
+ ordered = btrfs_lookup_first_ordered_extent(inode, off+len);
+ if (BTRFS_I(src)->delalloc_bytes == 0 && !ordered)
break;
- unlock_extent(&BTRFS_I(src)->io_tree, 0, (u64)-1, GFP_NOFS);
+ unlock_extent(&BTRFS_I(src)->io_tree, off, off+len, GFP_NOFS);
+ if (ordered)
+ btrfs_put_ordered_extent(ordered);
+ btrfs_wait_ordered_range(src, off, off+len);
}
- 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;
+ /* clone data */
key.objectid = src->i_ino;
- pos = 0;
- path->reada = 2;
+ key.type = BTRFS_EXTENT_DATA_KEY;
+ key.offset = 0;
while (1) {
/*
* note the key will change type as we walk through the
* tree.
*/
- ret = btrfs_search_slot(trans, root, &key, path, 0, 0);
+ ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
if (ret < 0)
goto out;
- if (path->slots[0] >= btrfs_header_nritems(path->nodes[0])) {
+ nritems = btrfs_header_nritems(path->nodes[0]);
+ if (path->slots[0] >= nritems) {
ret = btrfs_next_leaf(root, path);
if (ret < 0)
goto out;
if (ret > 0)
break;
+ nritems = btrfs_header_nritems(path->nodes[0]);
}
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 ||
+ btrfs_item_key_to_cpu(leaf, &key, slot);
+ if (btrfs_key_type(&key) > BTRFS_EXTENT_DATA_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;
+ int type;
+ u32 size;
+ struct btrfs_key new_key;
+ u64 disko = 0, diskl = 0;
+ u64 datao = 0, datal = 0;
+ u8 comp;
+
+ size = btrfs_item_size_nr(leaf, slot);
+ read_extent_buffer(leaf, buf,
+ btrfs_item_ptr_offset(leaf, slot),
+ size);
+
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,
+ comp = btrfs_file_extent_compression(leaf, extent);
+ type = btrfs_file_extent_type(leaf, extent);
+ if (type == BTRFS_FILE_EXTENT_REG ||
+ type == BTRFS_FILE_EXTENT_PREALLOC) {
+ disko = btrfs_file_extent_disk_bytenr(leaf,
extent);
- u64 ds = btrfs_file_extent_disk_bytenr(leaf,
- extent);
- u64 dl = btrfs_file_extent_disk_num_bytes(leaf,
+ diskl = 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);
+ datao = btrfs_file_extent_offset(leaf, extent);
+ datal = btrfs_file_extent_num_bytes(leaf,
+ extent);
+ } else if (type == BTRFS_FILE_EXTENT_INLINE) {
+ /* take upper bound, may be compressed */
+ datal = btrfs_file_extent_ram_bytes(leaf,
+ extent);
+ }
+ btrfs_release_path(root, path);
+
+ if (key.offset + datal < off ||
+ key.offset >= off+len)
+ goto next;
+
+ memcpy(&new_key, &key, sizeof(new_key));
+ new_key.objectid = inode->i_ino;
+ new_key.offset = key.offset + destoff - off;
+
+ trans = btrfs_start_transaction(root, 1);
+ if (IS_ERR(trans)) {
+ ret = PTR_ERR(trans);
+ goto out;
+ }
+
+ if (type == BTRFS_FILE_EXTENT_REG ||
+ type == BTRFS_FILE_EXTENT_PREALLOC) {
+ if (off > key.offset) {
+ datao += off - key.offset;
+ datal -= off - key.offset;
+ }
+
+ if (key.offset + datal > off + len)
+ datal = off + len - key.offset;
+
+ ret = btrfs_drop_extents(trans, inode,
+ new_key.offset,
+ new_key.offset + datal,
+ &hint_byte, 1);
+ BUG_ON(ret);
+
+ ret = btrfs_insert_empty_item(trans, root, path,
+ &new_key, size);
+ BUG_ON(ret);
+
+ leaf = path->nodes[0];
+ slot = path->slots[0];
+ write_extent_buffer(leaf, buf,
+ btrfs_item_ptr_offset(leaf, slot),
+ size);
+
+ extent = btrfs_item_ptr(leaf, slot,
+ struct btrfs_file_extent_item);
+
+ /* disko == 0 means it's a hole */
+ if (!disko)
+ datao = 0;
+
+ btrfs_set_file_extent_offset(leaf, extent,
+ datao);
+ btrfs_set_file_extent_num_bytes(leaf, extent,
+ datal);
+ if (disko) {
+ inode_add_bytes(inode, datal);
+ ret = btrfs_inc_extent_ref(trans, root,
+ disko, diskl, 0,
+ root->root_key.objectid,
+ inode->i_ino,
+ new_key.offset - datao);
+ BUG_ON(ret);
}
- 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)
+ } else if (type == BTRFS_FILE_EXTENT_INLINE) {
+ u64 skip = 0;
+ u64 trim = 0;
+ if (off > key.offset) {
+ skip = off - key.offset;
+ new_key.offset += skip;
+ }
+
+ if (key.offset + datal > off+len)
+ trim = key.offset + datal - (off+len);
+
+ if (comp && (skip || trim)) {
+ ret = -EINVAL;
+ btrfs_end_transaction(trans, root);
goto out;
- pos = key.offset + btrfs_item_size_nr(leaf,
- slot);
+ }
+ size -= skip + trim;
+ datal -= skip + trim;
+
+ ret = btrfs_drop_extents(trans, inode,
+ new_key.offset,
+ new_key.offset + datal,
+ &hint_byte, 1);
+ BUG_ON(ret);
+
+ ret = btrfs_insert_empty_item(trans, root, path,
+ &new_key, size);
+ BUG_ON(ret);
+
+ if (skip) {
+ u32 start =
+ btrfs_file_extent_calc_inline_size(0);
+ memmove(buf+start, buf+start+skip,
+ datal);
+ }
+
+ leaf = path->nodes[0];
+ slot = path->slots[0];
+ write_extent_buffer(leaf, buf,
+ btrfs_item_ptr_offset(leaf, slot),
+ size);
+ inode_add_bytes(inode, datal);
}
- } 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;
+ btrfs_mark_buffer_dirty(leaf);
+ btrfs_release_path(root, path);
+
+ inode->i_mtime = inode->i_ctime = CURRENT_TIME;
+ if (new_key.offset + datal > inode->i_size)
+ btrfs_i_size_write(inode,
+ new_key.offset + datal);
+ BTRFS_I(inode)->flags = BTRFS_I(src)->flags;
+ ret = btrfs_update_inode(trans, root, inode);
+ BUG_ON(ret);
+ btrfs_end_transaction(trans, root);
}
- key.offset++;
+next:
btrfs_release_path(root, path);
+ key.offset++;
}
-
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);
-
+ btrfs_release_path(root, path);
+ unlock_extent(&BTRFS_I(src)->io_tree, off, off+len, GFP_NOFS);
out_unlock:
mutex_unlock(&src->i_mutex);
mutex_unlock(&inode->i_mutex);
+ vfree(buf);
+ btrfs_free_path(path);
out_fput:
fput(src_file);
+out_drop_write:
+ mnt_drop_write(file->f_path.mnt);
return ret;
}
+static long btrfs_ioctl_clone_range(struct file *file, void __user *argp)
+{
+ struct btrfs_ioctl_clone_range_args args;
+
+ if (copy_from_user(&args, argp, sizeof(args)))
+ return -EFAULT;
+ return btrfs_ioctl_clone(file, args.src_fd, args.src_offset,
+ args.src_length, args.dest_offset);
+}
+
/*
* 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)
+static 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;
+ int ret;
+
+ ret = -EPERM;
+ if (!capable(CAP_SYS_ADMIN))
+ goto out;
+
+ ret = -EINPROGRESS;
+ if (file->private_data)
+ goto out;
+
+ ret = mnt_want_write(file->f_path.mnt);
+ if (ret)
+ goto out;
+
+ mutex_lock(&root->fs_info->trans_mutex);
+ root->fs_info->open_ioctl_trans++;
+ mutex_unlock(&root->fs_info->trans_mutex);
+
+ ret = -ENOMEM;
+ trans = btrfs_start_ioctl_transaction(root, 0);
+ if (!trans)
+ goto out_drop;
+
+ file->private_data = trans;
+ return 0;
+
+out_drop:
+ mutex_lock(&root->fs_info->trans_mutex);
+ root->fs_info->open_ioctl_trans--;
+ mutex_unlock(&root->fs_info->trans_mutex);
+ mnt_drop_write(file->f_path.mnt);
+out:
+ return ret;
+}
+
+static long btrfs_ioctl_default_subvol(struct file *file, void __user *argp)
+{
+ struct inode *inode = fdentry(file)->d_inode;
+ struct btrfs_root *root = BTRFS_I(inode)->root;
+ struct btrfs_root *new_root;
+ struct btrfs_dir_item *di;
+ struct btrfs_trans_handle *trans;
+ struct btrfs_path *path;
+ struct btrfs_key location;
+ struct btrfs_disk_key disk_key;
+ struct btrfs_super_block *disk_super;
+ u64 features;
+ u64 objectid = 0;
+ u64 dir_id;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
- if (file->private_data) {
- ret = -EINPROGRESS;
+ if (copy_from_user(&objectid, argp, sizeof(objectid)))
+ return -EFAULT;
+
+ if (!objectid)
+ objectid = root->root_key.objectid;
+
+ location.objectid = objectid;
+ location.type = BTRFS_ROOT_ITEM_KEY;
+ location.offset = (u64)-1;
+
+ new_root = btrfs_read_fs_root_no_name(root->fs_info, &location);
+ if (IS_ERR(new_root))
+ return PTR_ERR(new_root);
+
+ if (btrfs_root_refs(&new_root->root_item) == 0)
+ return -ENOENT;
+
+ path = btrfs_alloc_path();
+ if (!path)
+ return -ENOMEM;
+ path->leave_spinning = 1;
+
+ trans = btrfs_start_transaction(root, 1);
+ if (!trans) {
+ btrfs_free_path(path);
+ return -ENOMEM;
+ }
+
+ dir_id = btrfs_super_root_dir(&root->fs_info->super_copy);
+ di = btrfs_lookup_dir_item(trans, root->fs_info->tree_root, path,
+ dir_id, "default", 7, 1);
+ if (!di) {
+ btrfs_free_path(path);
+ btrfs_end_transaction(trans, root);
+ printk(KERN_ERR "Umm, you don't have the default dir item, "
+ "this isn't going to work\n");
+ return -ENOENT;
+ }
+
+ btrfs_cpu_key_to_disk(&disk_key, &new_root->root_key);
+ btrfs_set_dir_item_key(path->nodes[0], di, &disk_key);
+ btrfs_mark_buffer_dirty(path->nodes[0]);
+ btrfs_free_path(path);
+
+ disk_super = &root->fs_info->super_copy;
+ features = btrfs_super_incompat_flags(disk_super);
+ if (!(features & BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL)) {
+ features |= BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL;
+ btrfs_set_super_incompat_flags(disk_super, features);
+ }
+ btrfs_end_transaction(trans, root);
+
+ return 0;
+}
+
+long btrfs_ioctl_space_info(struct btrfs_root *root, void __user *arg)
+{
+ struct btrfs_ioctl_space_args space_args;
+ struct btrfs_ioctl_space_info space;
+ struct btrfs_ioctl_space_info *dest;
+ struct btrfs_ioctl_space_info *dest_orig;
+ struct btrfs_ioctl_space_info *user_dest;
+ struct btrfs_space_info *info;
+ int alloc_size;
+ int ret = 0;
+ int slot_count = 0;
+
+ if (copy_from_user(&space_args,
+ (struct btrfs_ioctl_space_args __user *)arg,
+ sizeof(space_args)))
+ return -EFAULT;
+
+ /* first we count slots */
+ rcu_read_lock();
+ list_for_each_entry_rcu(info, &root->fs_info->space_info, list)
+ slot_count++;
+ rcu_read_unlock();
+
+ /* space_slots == 0 means they are asking for a count */
+ if (space_args.space_slots == 0) {
+ space_args.total_spaces = slot_count;
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);*/
+ alloc_size = sizeof(*dest) * slot_count;
+ /* we generally have at most 6 or so space infos, one for each raid
+ * level. So, a whole page should be more than enough for everyone
+ */
+ if (alloc_size > PAGE_CACHE_SIZE)
+ return -ENOMEM;
+
+ space_args.total_spaces = 0;
+ dest = kmalloc(alloc_size, GFP_NOFS);
+ if (!dest)
+ return -ENOMEM;
+ dest_orig = dest;
+
+ /* now we have a buffer to copy into */
+ rcu_read_lock();
+ list_for_each_entry_rcu(info, &root->fs_info->space_info, list) {
+ /* make sure we don't copy more than we allocated
+ * in our buffer
+ */
+ if (slot_count == 0)
+ break;
+ slot_count--;
+
+ /* make sure userland has enough room in their buffer */
+ if (space_args.total_spaces >= space_args.space_slots)
+ break;
+
+ space.flags = info->flags;
+ space.total_bytes = info->total_bytes;
+ space.used_bytes = info->bytes_used;
+ memcpy(dest, &space, sizeof(space));
+ dest++;
+ space_args.total_spaces++;
+ }
+ rcu_read_unlock();
+
+ user_dest = (struct btrfs_ioctl_space_info *)
+ (arg + sizeof(struct btrfs_ioctl_space_args));
+
+ if (copy_to_user(user_dest, dest_orig, alloc_size))
+ ret = -EFAULT;
+
+ kfree(dest_orig);
out:
+ if (ret == 0 && copy_to_user(arg, &space_args, sizeof(space_args)))
+ ret = -EFAULT;
+
return ret;
}
struct inode *inode = fdentry(file)->d_inode;
struct btrfs_root *root = BTRFS_I(inode)->root;
struct btrfs_trans_handle *trans;
- int ret = 0;
trans = file->private_data;
- if (!trans) {
- ret = -EINVAL;
- goto out;
- }
+ if (!trans)
+ return -EINVAL;
+ file->private_data = NULL;
+
btrfs_end_transaction(trans, root);
- file->private_data = 0;
-out:
- return ret;
+
+ mutex_lock(&root->fs_info->trans_mutex);
+ root->fs_info->open_ioctl_trans--;
+ mutex_unlock(&root->fs_info->trans_mutex);
+
+ mnt_drop_write(file->f_path.mnt);
+ return 0;
}
long btrfs_ioctl(struct file *file, unsigned int
cmd, unsigned long arg)
{
struct btrfs_root *root = BTRFS_I(fdentry(file)->d_inode)->root;
+ void __user *argp = (void __user *)arg;
switch (cmd) {
+ case FS_IOC_GETFLAGS:
+ return btrfs_ioctl_getflags(file, argp);
+ case FS_IOC_SETFLAGS:
+ return btrfs_ioctl_setflags(file, argp);
+ case FS_IOC_GETVERSION:
+ return btrfs_ioctl_getversion(file, argp);
case BTRFS_IOC_SNAP_CREATE:
- return btrfs_ioctl_snap_create(root, (void __user *)arg);
+ return btrfs_ioctl_snap_create(file, argp, 0);
+ case BTRFS_IOC_SUBVOL_CREATE:
+ return btrfs_ioctl_snap_create(file, argp, 1);
+ case BTRFS_IOC_SNAP_DESTROY:
+ return btrfs_ioctl_snap_destroy(file, argp);
+ case BTRFS_IOC_DEFAULT_SUBVOL:
+ return btrfs_ioctl_default_subvol(file, argp);
case BTRFS_IOC_DEFRAG:
- return btrfs_ioctl_defrag(file);
+ return btrfs_ioctl_defrag(file, NULL);
+ case BTRFS_IOC_DEFRAG_RANGE:
+ return btrfs_ioctl_defrag(file, argp);
case BTRFS_IOC_RESIZE:
- return btrfs_ioctl_resize(root, (void __user *)arg);
+ return btrfs_ioctl_resize(root, argp);
case BTRFS_IOC_ADD_DEV:
- return btrfs_ioctl_add_dev(root, (void __user *)arg);
+ return btrfs_ioctl_add_dev(root, argp);
case BTRFS_IOC_RM_DEV:
- return btrfs_ioctl_rm_dev(root, (void __user *)arg);
+ return btrfs_ioctl_rm_dev(root, argp);
case BTRFS_IOC_BALANCE:
return btrfs_balance(root->fs_info->dev_root);
case BTRFS_IOC_CLONE:
- return btrfs_ioctl_clone(file, arg);
+ return btrfs_ioctl_clone(file, arg, 0, 0, 0);
+ case BTRFS_IOC_CLONE_RANGE:
+ return btrfs_ioctl_clone_range(file, argp);
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_TREE_SEARCH:
+ return btrfs_ioctl_tree_search(file, argp);
+ case BTRFS_IOC_INO_LOOKUP:
+ return btrfs_ioctl_ino_lookup(file, argp);
+ case BTRFS_IOC_SPACE_INFO:
+ return btrfs_ioctl_space_info(root, argp);
case BTRFS_IOC_SYNC:
btrfs_sync_fs(file->f_dentry->d_sb, 1);
return 0;