3959 lines
93 KiB
C
3959 lines
93 KiB
C
/*
|
|
* Copyright (C) 2007 Oracle. All rights reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public
|
|
* License v2 as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public
|
|
* License along with this program; if not, write to the
|
|
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
* Boston, MA 021110-1307, USA.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/bio.h>
|
|
#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/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/security.h>
|
|
#include <linux/xattr.h>
|
|
#include <linux/vmalloc.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/blkdev.h>
|
|
#include <linux/uuid.h>
|
|
#include "compat.h"
|
|
#include "ctree.h"
|
|
#include "disk-io.h"
|
|
#include "transaction.h"
|
|
#include "btrfs_inode.h"
|
|
#include "ioctl.h"
|
|
#include "print-tree.h"
|
|
#include "volumes.h"
|
|
#include "locking.h"
|
|
#include "inode-map.h"
|
|
#include "backref.h"
|
|
#include "rcu-string.h"
|
|
#include "send.h"
|
|
#include "dev-replace.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;
|
|
if (flags & BTRFS_INODE_NODATACOW)
|
|
iflags |= FS_NOCOW_FL;
|
|
|
|
if ((flags & BTRFS_INODE_COMPRESS) && !(flags & BTRFS_INODE_NOCOMPRESS))
|
|
iflags |= FS_COMPR_FL;
|
|
else if (flags & BTRFS_INODE_NOCOMPRESS)
|
|
iflags |= FS_NOCOMP_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.
|
|
*
|
|
* Currently only the compression flags and the cow flags are inherited.
|
|
*/
|
|
void btrfs_inherit_iflags(struct inode *inode, struct inode *dir)
|
|
{
|
|
unsigned int flags;
|
|
|
|
if (!dir)
|
|
return;
|
|
|
|
flags = BTRFS_I(dir)->flags;
|
|
|
|
if (flags & BTRFS_INODE_NOCOMPRESS) {
|
|
BTRFS_I(inode)->flags &= ~BTRFS_INODE_COMPRESS;
|
|
BTRFS_I(inode)->flags |= BTRFS_INODE_NOCOMPRESS;
|
|
} else if (flags & BTRFS_INODE_COMPRESS) {
|
|
BTRFS_I(inode)->flags &= ~BTRFS_INODE_NOCOMPRESS;
|
|
BTRFS_I(inode)->flags |= BTRFS_INODE_COMPRESS;
|
|
}
|
|
|
|
if (flags & BTRFS_INODE_NODATACOW) {
|
|
BTRFS_I(inode)->flags |= BTRFS_INODE_NODATACOW;
|
|
if (S_ISREG(inode->i_mode))
|
|
BTRFS_I(inode)->flags |= BTRFS_INODE_NODATASUM;
|
|
}
|
|
|
|
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 check_flags(unsigned int flags)
|
|
{
|
|
if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
|
|
FS_NOATIME_FL | FS_NODUMP_FL | \
|
|
FS_SYNC_FL | FS_DIRSYNC_FL | \
|
|
FS_NOCOMP_FL | FS_COMPR_FL |
|
|
FS_NOCOW_FL))
|
|
return -EOPNOTSUPP;
|
|
|
|
if ((flags & FS_NOCOMP_FL) && (flags & FS_COMPR_FL))
|
|
return -EINVAL;
|
|
|
|
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;
|
|
u64 ip_oldflags;
|
|
unsigned int i_oldflags;
|
|
umode_t mode;
|
|
|
|
if (btrfs_root_readonly(root))
|
|
return -EROFS;
|
|
|
|
if (copy_from_user(&flags, arg, sizeof(flags)))
|
|
return -EFAULT;
|
|
|
|
ret = check_flags(flags);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (!inode_owner_or_capable(inode))
|
|
return -EACCES;
|
|
|
|
ret = mnt_want_write_file(file);
|
|
if (ret)
|
|
return ret;
|
|
|
|
mutex_lock(&inode->i_mutex);
|
|
|
|
ip_oldflags = ip->flags;
|
|
i_oldflags = inode->i_flags;
|
|
mode = inode->i_mode;
|
|
|
|
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;
|
|
}
|
|
}
|
|
|
|
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;
|
|
if (flags & FS_NOCOW_FL) {
|
|
if (S_ISREG(mode)) {
|
|
/*
|
|
* It's safe to turn csums off here, no extents exist.
|
|
* Otherwise we want the flag to reflect the real COW
|
|
* status of the file and will not set it.
|
|
*/
|
|
if (inode->i_size == 0)
|
|
ip->flags |= BTRFS_INODE_NODATACOW
|
|
| BTRFS_INODE_NODATASUM;
|
|
} else {
|
|
ip->flags |= BTRFS_INODE_NODATACOW;
|
|
}
|
|
} else {
|
|
/*
|
|
* Revert back under same assuptions as above
|
|
*/
|
|
if (S_ISREG(mode)) {
|
|
if (inode->i_size == 0)
|
|
ip->flags &= ~(BTRFS_INODE_NODATACOW
|
|
| BTRFS_INODE_NODATASUM);
|
|
} else {
|
|
ip->flags &= ~BTRFS_INODE_NODATACOW;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* The COMPRESS flag can only be changed by users, while the NOCOMPRESS
|
|
* flag may be changed automatically if compression code won't make
|
|
* things smaller.
|
|
*/
|
|
if (flags & FS_NOCOMP_FL) {
|
|
ip->flags &= ~BTRFS_INODE_COMPRESS;
|
|
ip->flags |= BTRFS_INODE_NOCOMPRESS;
|
|
} else if (flags & FS_COMPR_FL) {
|
|
ip->flags |= BTRFS_INODE_COMPRESS;
|
|
ip->flags &= ~BTRFS_INODE_NOCOMPRESS;
|
|
} else {
|
|
ip->flags &= ~(BTRFS_INODE_COMPRESS | BTRFS_INODE_NOCOMPRESS);
|
|
}
|
|
|
|
trans = btrfs_start_transaction(root, 1);
|
|
if (IS_ERR(trans)) {
|
|
ret = PTR_ERR(trans);
|
|
goto out_drop;
|
|
}
|
|
|
|
btrfs_update_iflags(inode);
|
|
inode_inc_iversion(inode);
|
|
inode->i_ctime = CURRENT_TIME;
|
|
ret = btrfs_update_inode(trans, root, inode);
|
|
|
|
btrfs_end_transaction(trans, root);
|
|
out_drop:
|
|
if (ret) {
|
|
ip->flags = ip_oldflags;
|
|
inode->i_flags = i_oldflags;
|
|
}
|
|
|
|
out_unlock:
|
|
mutex_unlock(&inode->i_mutex);
|
|
mnt_drop_write_file(file);
|
|
return ret;
|
|
}
|
|
|
|
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 btrfs_ioctl_fitrim(struct file *file, void __user *arg)
|
|
{
|
|
struct btrfs_fs_info *fs_info = btrfs_sb(fdentry(file)->d_sb);
|
|
struct btrfs_device *device;
|
|
struct request_queue *q;
|
|
struct fstrim_range range;
|
|
u64 minlen = ULLONG_MAX;
|
|
u64 num_devices = 0;
|
|
u64 total_bytes = btrfs_super_total_bytes(fs_info->super_copy);
|
|
int ret;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
rcu_read_lock();
|
|
list_for_each_entry_rcu(device, &fs_info->fs_devices->devices,
|
|
dev_list) {
|
|
if (!device->bdev)
|
|
continue;
|
|
q = bdev_get_queue(device->bdev);
|
|
if (blk_queue_discard(q)) {
|
|
num_devices++;
|
|
minlen = min((u64)q->limits.discard_granularity,
|
|
minlen);
|
|
}
|
|
}
|
|
rcu_read_unlock();
|
|
|
|
if (!num_devices)
|
|
return -EOPNOTSUPP;
|
|
if (copy_from_user(&range, arg, sizeof(range)))
|
|
return -EFAULT;
|
|
if (range.start > total_bytes ||
|
|
range.len < fs_info->sb->s_blocksize)
|
|
return -EINVAL;
|
|
|
|
range.len = min(range.len, total_bytes - range.start);
|
|
range.minlen = max(range.minlen, minlen);
|
|
ret = btrfs_trim_fs(fs_info->tree_root, &range);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (copy_to_user(arg, &range, sizeof(range)))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static noinline int create_subvol(struct btrfs_root *root,
|
|
struct dentry *dentry,
|
|
char *name, int namelen,
|
|
u64 *async_transid,
|
|
struct btrfs_qgroup_inherit **inherit)
|
|
{
|
|
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;
|
|
struct dentry *parent = dentry->d_parent;
|
|
struct inode *dir;
|
|
struct timespec cur_time = CURRENT_TIME;
|
|
int ret;
|
|
int err;
|
|
u64 objectid;
|
|
u64 new_dirid = BTRFS_FIRST_FREE_OBJECTID;
|
|
u64 index = 0;
|
|
uuid_le new_uuid;
|
|
|
|
ret = btrfs_find_free_objectid(root->fs_info->tree_root, &objectid);
|
|
if (ret)
|
|
return ret;
|
|
|
|
dir = parent->d_inode;
|
|
|
|
/*
|
|
* 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);
|
|
|
|
ret = btrfs_qgroup_inherit(trans, root->fs_info, 0, objectid,
|
|
inherit ? *inherit : NULL);
|
|
if (ret)
|
|
goto fail;
|
|
|
|
leaf = btrfs_alloc_free_block(trans, root, root->leafsize,
|
|
0, objectid, NULL, 0, 0, 0);
|
|
if (IS_ERR(leaf)) {
|
|
ret = PTR_ERR(leaf);
|
|
goto fail;
|
|
}
|
|
|
|
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);
|
|
|
|
memset(&root_item, 0, sizeof(root_item));
|
|
|
|
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->nbytes = cpu_to_le64(root->leafsize);
|
|
inode_item->mode = cpu_to_le32(S_IFDIR | 0755);
|
|
|
|
root_item.flags = 0;
|
|
root_item.byte_limit = 0;
|
|
inode_item->flags = cpu_to_le64(BTRFS_INODE_ROOT_ITEM_INIT);
|
|
|
|
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, leaf->len);
|
|
btrfs_set_root_last_snapshot(&root_item, 0);
|
|
|
|
btrfs_set_root_generation_v2(&root_item,
|
|
btrfs_root_generation(&root_item));
|
|
uuid_le_gen(&new_uuid);
|
|
memcpy(root_item.uuid, new_uuid.b, BTRFS_UUID_SIZE);
|
|
root_item.otime.sec = cpu_to_le64(cur_time.tv_sec);
|
|
root_item.otime.nsec = cpu_to_le32(cur_time.tv_nsec);
|
|
root_item.ctime = root_item.otime;
|
|
btrfs_set_root_ctransid(&root_item, trans->transid);
|
|
btrfs_set_root_otransid(&root_item, trans->transid);
|
|
|
|
btrfs_tree_unlock(leaf);
|
|
free_extent_buffer(leaf);
|
|
leaf = NULL;
|
|
|
|
btrfs_set_root_dirid(&root_item, new_dirid);
|
|
|
|
key.objectid = objectid;
|
|
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);
|
|
if (IS_ERR(new_root)) {
|
|
btrfs_abort_transaction(trans, root, PTR_ERR(new_root));
|
|
ret = PTR_ERR(new_root);
|
|
goto fail;
|
|
}
|
|
|
|
btrfs_record_root_in_trans(trans, new_root);
|
|
|
|
ret = btrfs_create_subvol_root(trans, new_root, new_dirid);
|
|
if (ret) {
|
|
/* We potentially lose an unused inode item here */
|
|
btrfs_abort_transaction(trans, root, ret);
|
|
goto fail;
|
|
}
|
|
|
|
/*
|
|
* insert the directory item
|
|
*/
|
|
ret = btrfs_set_inode_index(dir, &index);
|
|
if (ret) {
|
|
btrfs_abort_transaction(trans, root, ret);
|
|
goto fail;
|
|
}
|
|
|
|
ret = btrfs_insert_dir_item(trans, root,
|
|
name, namelen, dir, &key,
|
|
BTRFS_FT_DIR, index);
|
|
if (ret) {
|
|
btrfs_abort_transaction(trans, root, ret);
|
|
goto fail;
|
|
}
|
|
|
|
btrfs_i_size_write(dir, dir->i_size + namelen * 2);
|
|
ret = btrfs_update_inode(trans, root, dir);
|
|
BUG_ON(ret);
|
|
|
|
ret = btrfs_add_root_ref(trans, root->fs_info->tree_root,
|
|
objectid, root->root_key.objectid,
|
|
btrfs_ino(dir), index, name, namelen);
|
|
|
|
BUG_ON(ret);
|
|
|
|
d_instantiate(dentry, btrfs_lookup_dentry(dir, dentry));
|
|
fail:
|
|
if (async_transid) {
|
|
*async_transid = trans->transid;
|
|
err = btrfs_commit_transaction_async(trans, root, 1);
|
|
} else {
|
|
err = btrfs_commit_transaction(trans, root);
|
|
}
|
|
if (err && !ret)
|
|
ret = err;
|
|
return ret;
|
|
}
|
|
|
|
static int create_snapshot(struct btrfs_root *root, struct dentry *dentry,
|
|
char *name, int namelen, u64 *async_transid,
|
|
bool readonly, struct btrfs_qgroup_inherit **inherit)
|
|
{
|
|
struct inode *inode;
|
|
struct btrfs_pending_snapshot *pending_snapshot;
|
|
struct btrfs_trans_handle *trans;
|
|
int ret;
|
|
|
|
if (!root->ref_cows)
|
|
return -EINVAL;
|
|
|
|
pending_snapshot = kzalloc(sizeof(*pending_snapshot), GFP_NOFS);
|
|
if (!pending_snapshot)
|
|
return -ENOMEM;
|
|
|
|
btrfs_init_block_rsv(&pending_snapshot->block_rsv,
|
|
BTRFS_BLOCK_RSV_TEMP);
|
|
pending_snapshot->dentry = dentry;
|
|
pending_snapshot->root = root;
|
|
pending_snapshot->readonly = readonly;
|
|
if (inherit) {
|
|
pending_snapshot->inherit = *inherit;
|
|
*inherit = NULL; /* take responsibility to free it */
|
|
}
|
|
|
|
trans = btrfs_start_transaction(root->fs_info->extent_root, 6);
|
|
if (IS_ERR(trans)) {
|
|
ret = PTR_ERR(trans);
|
|
goto fail;
|
|
}
|
|
|
|
ret = btrfs_snap_reserve_metadata(trans, pending_snapshot);
|
|
BUG_ON(ret);
|
|
|
|
spin_lock(&root->fs_info->trans_lock);
|
|
list_add(&pending_snapshot->list,
|
|
&trans->transaction->pending_snapshots);
|
|
spin_unlock(&root->fs_info->trans_lock);
|
|
if (async_transid) {
|
|
*async_transid = trans->transid;
|
|
ret = btrfs_commit_transaction_async(trans,
|
|
root->fs_info->extent_root, 1);
|
|
} else {
|
|
ret = btrfs_commit_transaction(trans,
|
|
root->fs_info->extent_root);
|
|
}
|
|
if (ret) {
|
|
/* cleanup_transaction has freed this for us */
|
|
if (trans->aborted)
|
|
pending_snapshot = NULL;
|
|
goto fail;
|
|
}
|
|
|
|
ret = pending_snapshot->error;
|
|
if (ret)
|
|
goto fail;
|
|
|
|
ret = btrfs_orphan_cleanup(pending_snapshot->snap);
|
|
if (ret)
|
|
goto fail;
|
|
|
|
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 check_sticky in fs/namei.c()
|
|
* It's inline, so penalty for filesystems that don't use sticky bit is
|
|
* minimal.
|
|
*/
|
|
static inline int btrfs_check_sticky(struct inode *dir, struct inode *inode)
|
|
{
|
|
kuid_t fsuid = current_fsuid();
|
|
|
|
if (!(dir->i_mode & S_ISVTX))
|
|
return 0;
|
|
if (uid_eq(inode->i_uid, fsuid))
|
|
return 0;
|
|
if (uid_eq(dir->i_uid, fsuid))
|
|
return 0;
|
|
return !capable(CAP_FOWNER);
|
|
}
|
|
|
|
/* copy of may_delete in fs/namei.c()
|
|
* Check whether we can remove a link victim from directory dir, check
|
|
* whether the type of victim is right.
|
|
* 1. We can't do it if dir is read-only (done in permission())
|
|
* 2. We should have write and exec permissions on dir
|
|
* 3. We can't remove anything from append-only dir
|
|
* 4. We can't do anything with immutable dir (done in permission())
|
|
* 5. If the sticky bit on dir is set we should either
|
|
* a. be owner of dir, or
|
|
* b. be owner of victim, or
|
|
* c. have CAP_FOWNER capability
|
|
* 6. If the victim is append-only or immutable we can't do antyhing with
|
|
* links pointing to it.
|
|
* 7. If we were asked to remove a directory and victim isn't one - ENOTDIR.
|
|
* 8. If we were asked to remove a non-directory and victim isn't one - EISDIR.
|
|
* 9. We can't remove a root or mountpoint.
|
|
* 10. We don't allow removal of NFS sillyrenamed files; it's handled by
|
|
* nfs_async_unlink().
|
|
*/
|
|
|
|
static int btrfs_may_delete(struct inode *dir,struct dentry *victim,int isdir)
|
|
{
|
|
int error;
|
|
|
|
if (!victim->d_inode)
|
|
return -ENOENT;
|
|
|
|
BUG_ON(victim->d_parent->d_inode != dir);
|
|
audit_inode_child(dir, victim, AUDIT_TYPE_CHILD_DELETE);
|
|
|
|
error = inode_permission(dir, MAY_WRITE | MAY_EXEC);
|
|
if (error)
|
|
return error;
|
|
if (IS_APPEND(dir))
|
|
return -EPERM;
|
|
if (btrfs_check_sticky(dir, victim->d_inode)||
|
|
IS_APPEND(victim->d_inode)||
|
|
IS_IMMUTABLE(victim->d_inode) || IS_SWAPFILE(victim->d_inode))
|
|
return -EPERM;
|
|
if (isdir) {
|
|
if (!S_ISDIR(victim->d_inode->i_mode))
|
|
return -ENOTDIR;
|
|
if (IS_ROOT(victim))
|
|
return -EBUSY;
|
|
} else if (S_ISDIR(victim->d_inode->i_mode))
|
|
return -EISDIR;
|
|
if (IS_DEADDIR(dir))
|
|
return -ENOENT;
|
|
if (victim->d_flags & DCACHE_NFSFS_RENAMED)
|
|
return -EBUSY;
|
|
return 0;
|
|
}
|
|
|
|
/* 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,
|
|
u64 *async_transid, bool readonly,
|
|
struct btrfs_qgroup_inherit **inherit)
|
|
{
|
|
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 = btrfs_may_create(dir, dentry);
|
|
if (error)
|
|
goto out_dput;
|
|
|
|
/*
|
|
* even if this name doesn't exist, we may get hash collisions.
|
|
* check for them now when we can safely fail
|
|
*/
|
|
error = btrfs_check_dir_item_collision(BTRFS_I(dir)->root,
|
|
dir->i_ino, name,
|
|
namelen);
|
|
if (error)
|
|
goto out_dput;
|
|
|
|
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, name, namelen,
|
|
async_transid, readonly, inherit);
|
|
} else {
|
|
error = create_subvol(BTRFS_I(dir)->root, dentry,
|
|
name, namelen, async_transid, inherit);
|
|
}
|
|
if (!error)
|
|
fsnotify_mkdir(dir, dentry);
|
|
out_up_read:
|
|
up_read(&BTRFS_I(dir)->root->fs_info->subvol_sem);
|
|
out_dput:
|
|
dput(dentry);
|
|
out_unlock:
|
|
mutex_unlock(&dir->i_mutex);
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* When we're defragging a range, we don't want to kick it off again
|
|
* if it is really just waiting for delalloc to send it down.
|
|
* If we find a nice big extent or delalloc range for the bytes in the
|
|
* file you want to defrag, we return 0 to let you know to skip this
|
|
* part of the file
|
|
*/
|
|
static int check_defrag_in_cache(struct inode *inode, u64 offset, int thresh)
|
|
{
|
|
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;
|
|
u64 end;
|
|
|
|
read_lock(&em_tree->lock);
|
|
em = lookup_extent_mapping(em_tree, offset, PAGE_CACHE_SIZE);
|
|
read_unlock(&em_tree->lock);
|
|
|
|
if (em) {
|
|
end = extent_map_end(em);
|
|
free_extent_map(em);
|
|
if (end - offset > thresh)
|
|
return 0;
|
|
}
|
|
/* if we already have a nice delalloc here, just stop */
|
|
thresh /= 2;
|
|
end = count_range_bits(io_tree, &offset, offset + thresh,
|
|
thresh, EXTENT_DELALLOC, 1);
|
|
if (end >= thresh)
|
|
return 0;
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* helper function to walk through a file and find extents
|
|
* newer than a specific transid, and smaller than thresh.
|
|
*
|
|
* This is used by the defragging code to find new and small
|
|
* extents
|
|
*/
|
|
static int find_new_extents(struct btrfs_root *root,
|
|
struct inode *inode, u64 newer_than,
|
|
u64 *off, int thresh)
|
|
{
|
|
struct btrfs_path *path;
|
|
struct btrfs_key min_key;
|
|
struct btrfs_key max_key;
|
|
struct extent_buffer *leaf;
|
|
struct btrfs_file_extent_item *extent;
|
|
int type;
|
|
int ret;
|
|
u64 ino = btrfs_ino(inode);
|
|
|
|
path = btrfs_alloc_path();
|
|
if (!path)
|
|
return -ENOMEM;
|
|
|
|
min_key.objectid = ino;
|
|
min_key.type = BTRFS_EXTENT_DATA_KEY;
|
|
min_key.offset = *off;
|
|
|
|
max_key.objectid = ino;
|
|
max_key.type = (u8)-1;
|
|
max_key.offset = (u64)-1;
|
|
|
|
path->keep_locks = 1;
|
|
|
|
while(1) {
|
|
ret = btrfs_search_forward(root, &min_key, &max_key,
|
|
path, 0, newer_than);
|
|
if (ret != 0)
|
|
goto none;
|
|
if (min_key.objectid != ino)
|
|
goto none;
|
|
if (min_key.type != BTRFS_EXTENT_DATA_KEY)
|
|
goto none;
|
|
|
|
leaf = path->nodes[0];
|
|
extent = btrfs_item_ptr(leaf, path->slots[0],
|
|
struct btrfs_file_extent_item);
|
|
|
|
type = btrfs_file_extent_type(leaf, extent);
|
|
if (type == BTRFS_FILE_EXTENT_REG &&
|
|
btrfs_file_extent_num_bytes(leaf, extent) < thresh &&
|
|
check_defrag_in_cache(inode, min_key.offset, thresh)) {
|
|
*off = min_key.offset;
|
|
btrfs_free_path(path);
|
|
return 0;
|
|
}
|
|
|
|
if (min_key.offset == (u64)-1)
|
|
goto none;
|
|
|
|
min_key.offset++;
|
|
btrfs_release_path(path);
|
|
}
|
|
none:
|
|
btrfs_free_path(path);
|
|
return -ENOENT;
|
|
}
|
|
|
|
static struct extent_map *defrag_lookup_extent(struct inode *inode, u64 start)
|
|
{
|
|
struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree;
|
|
struct extent_io_tree *io_tree = &BTRFS_I(inode)->io_tree;
|
|
struct extent_map *em;
|
|
u64 len = PAGE_CACHE_SIZE;
|
|
|
|
/*
|
|
* 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);
|
|
em = btrfs_get_extent(inode, NULL, 0, start, len, 0);
|
|
unlock_extent(io_tree, start, start + len - 1);
|
|
|
|
if (IS_ERR(em))
|
|
return NULL;
|
|
}
|
|
|
|
return em;
|
|
}
|
|
|
|
static bool defrag_check_next_extent(struct inode *inode, struct extent_map *em)
|
|
{
|
|
struct extent_map *next;
|
|
bool ret = true;
|
|
|
|
/* this is the last extent */
|
|
if (em->start + em->len >= i_size_read(inode))
|
|
return false;
|
|
|
|
next = defrag_lookup_extent(inode, em->start + em->len);
|
|
if (!next || next->block_start >= EXTENT_MAP_LAST_BYTE)
|
|
ret = false;
|
|
|
|
free_extent_map(next);
|
|
return ret;
|
|
}
|
|
|
|
static int should_defrag_range(struct inode *inode, u64 start, int thresh,
|
|
u64 *last_len, u64 *skip, u64 *defrag_end,
|
|
int compress)
|
|
{
|
|
struct extent_map *em;
|
|
int ret = 1;
|
|
bool next_mergeable = true;
|
|
|
|
/*
|
|
* make sure that once we start defragging an extent, we keep on
|
|
* defragging it
|
|
*/
|
|
if (start < *defrag_end)
|
|
return 1;
|
|
|
|
*skip = 0;
|
|
|
|
em = defrag_lookup_extent(inode, start);
|
|
if (!em)
|
|
return 0;
|
|
|
|
/* this will cover holes, and inline extents */
|
|
if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
|
|
ret = 0;
|
|
goto out;
|
|
}
|
|
|
|
next_mergeable = defrag_check_next_extent(inode, em);
|
|
|
|
/*
|
|
* we hit a real extent, if it is big or the next extent is not a
|
|
* real extent, don't bother defragging it
|
|
*/
|
|
if (!compress && (*last_len == 0 || *last_len >= thresh) &&
|
|
(em->len >= thresh || !next_mergeable))
|
|
ret = 0;
|
|
out:
|
|
/*
|
|
* 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) {
|
|
*defrag_end = extent_map_end(em);
|
|
} else {
|
|
*last_len = 0;
|
|
*skip = extent_map_end(em);
|
|
*defrag_end = 0;
|
|
}
|
|
|
|
free_extent_map(em);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* it doesn't do much good to defrag one or two pages
|
|
* at a time. This pulls in a nice chunk of pages
|
|
* to COW and defrag.
|
|
*
|
|
* It also makes sure the delalloc code has enough
|
|
* dirty data to avoid making new small extents as part
|
|
* of the defrag
|
|
*
|
|
* It's a good idea to start RA on this range
|
|
* before calling this.
|
|
*/
|
|
static int cluster_pages_for_defrag(struct inode *inode,
|
|
struct page **pages,
|
|
unsigned long start_index,
|
|
int num_pages)
|
|
{
|
|
unsigned long file_end;
|
|
u64 isize = i_size_read(inode);
|
|
u64 page_start;
|
|
u64 page_end;
|
|
u64 page_cnt;
|
|
int ret;
|
|
int i;
|
|
int i_done;
|
|
struct btrfs_ordered_extent *ordered;
|
|
struct extent_state *cached_state = NULL;
|
|
struct extent_io_tree *tree;
|
|
gfp_t mask = btrfs_alloc_write_mask(inode->i_mapping);
|
|
|
|
file_end = (isize - 1) >> PAGE_CACHE_SHIFT;
|
|
if (!isize || start_index > file_end)
|
|
return 0;
|
|
|
|
page_cnt = min_t(u64, (u64)num_pages, (u64)file_end - start_index + 1);
|
|
|
|
ret = btrfs_delalloc_reserve_space(inode,
|
|
page_cnt << PAGE_CACHE_SHIFT);
|
|
if (ret)
|
|
return ret;
|
|
i_done = 0;
|
|
tree = &BTRFS_I(inode)->io_tree;
|
|
|
|
/* step one, lock all the pages */
|
|
for (i = 0; i < page_cnt; i++) {
|
|
struct page *page;
|
|
again:
|
|
page = find_or_create_page(inode->i_mapping,
|
|
start_index + i, mask);
|
|
if (!page)
|
|
break;
|
|
|
|
page_start = page_offset(page);
|
|
page_end = page_start + PAGE_CACHE_SIZE - 1;
|
|
while (1) {
|
|
lock_extent(tree, page_start, page_end);
|
|
ordered = btrfs_lookup_ordered_extent(inode,
|
|
page_start);
|
|
unlock_extent(tree, page_start, page_end);
|
|
if (!ordered)
|
|
break;
|
|
|
|
unlock_page(page);
|
|
btrfs_start_ordered_extent(inode, ordered, 1);
|
|
btrfs_put_ordered_extent(ordered);
|
|
lock_page(page);
|
|
/*
|
|
* we unlocked the page above, so we need check if
|
|
* it was released or not.
|
|
*/
|
|
if (page->mapping != inode->i_mapping) {
|
|
unlock_page(page);
|
|
page_cache_release(page);
|
|
goto again;
|
|
}
|
|
}
|
|
|
|
if (!PageUptodate(page)) {
|
|
btrfs_readpage(NULL, page);
|
|
lock_page(page);
|
|
if (!PageUptodate(page)) {
|
|
unlock_page(page);
|
|
page_cache_release(page);
|
|
ret = -EIO;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (page->mapping != inode->i_mapping) {
|
|
unlock_page(page);
|
|
page_cache_release(page);
|
|
goto again;
|
|
}
|
|
|
|
pages[i] = page;
|
|
i_done++;
|
|
}
|
|
if (!i_done || ret)
|
|
goto out;
|
|
|
|
if (!(inode->i_sb->s_flags & MS_ACTIVE))
|
|
goto out;
|
|
|
|
/*
|
|
* so now we have a nice long stream of locked
|
|
* and up to date pages, lets wait on them
|
|
*/
|
|
for (i = 0; i < i_done; i++)
|
|
wait_on_page_writeback(pages[i]);
|
|
|
|
page_start = page_offset(pages[0]);
|
|
page_end = page_offset(pages[i_done - 1]) + PAGE_CACHE_SIZE;
|
|
|
|
lock_extent_bits(&BTRFS_I(inode)->io_tree,
|
|
page_start, page_end - 1, 0, &cached_state);
|
|
clear_extent_bit(&BTRFS_I(inode)->io_tree, page_start,
|
|
page_end - 1, EXTENT_DIRTY | EXTENT_DELALLOC |
|
|
EXTENT_DO_ACCOUNTING | EXTENT_DEFRAG, 0, 0,
|
|
&cached_state, GFP_NOFS);
|
|
|
|
if (i_done != page_cnt) {
|
|
spin_lock(&BTRFS_I(inode)->lock);
|
|
BTRFS_I(inode)->outstanding_extents++;
|
|
spin_unlock(&BTRFS_I(inode)->lock);
|
|
btrfs_delalloc_release_space(inode,
|
|
(page_cnt - i_done) << PAGE_CACHE_SHIFT);
|
|
}
|
|
|
|
|
|
set_extent_defrag(&BTRFS_I(inode)->io_tree, page_start, page_end - 1,
|
|
&cached_state, GFP_NOFS);
|
|
|
|
unlock_extent_cached(&BTRFS_I(inode)->io_tree,
|
|
page_start, page_end - 1, &cached_state,
|
|
GFP_NOFS);
|
|
|
|
for (i = 0; i < i_done; i++) {
|
|
clear_page_dirty_for_io(pages[i]);
|
|
ClearPageChecked(pages[i]);
|
|
set_page_extent_mapped(pages[i]);
|
|
set_page_dirty(pages[i]);
|
|
unlock_page(pages[i]);
|
|
page_cache_release(pages[i]);
|
|
}
|
|
return i_done;
|
|
out:
|
|
for (i = 0; i < i_done; i++) {
|
|
unlock_page(pages[i]);
|
|
page_cache_release(pages[i]);
|
|
}
|
|
btrfs_delalloc_release_space(inode, page_cnt << PAGE_CACHE_SHIFT);
|
|
return ret;
|
|
|
|
}
|
|
|
|
int btrfs_defrag_file(struct inode *inode, struct file *file,
|
|
struct btrfs_ioctl_defrag_range_args *range,
|
|
u64 newer_than, unsigned long max_to_defrag)
|
|
{
|
|
struct btrfs_root *root = BTRFS_I(inode)->root;
|
|
struct file_ra_state *ra = NULL;
|
|
unsigned long last_index;
|
|
u64 isize = i_size_read(inode);
|
|
u64 last_len = 0;
|
|
u64 skip = 0;
|
|
u64 defrag_end = 0;
|
|
u64 newer_off = range->start;
|
|
unsigned long i;
|
|
unsigned long ra_index = 0;
|
|
int ret;
|
|
int defrag_count = 0;
|
|
int compress_type = BTRFS_COMPRESS_ZLIB;
|
|
int extent_thresh = range->extent_thresh;
|
|
int max_cluster = (256 * 1024) >> PAGE_CACHE_SHIFT;
|
|
int cluster = max_cluster;
|
|
u64 new_align = ~((u64)128 * 1024 - 1);
|
|
struct page **pages = NULL;
|
|
|
|
if (extent_thresh == 0)
|
|
extent_thresh = 256 * 1024;
|
|
|
|
if (range->flags & BTRFS_DEFRAG_RANGE_COMPRESS) {
|
|
if (range->compress_type > BTRFS_COMPRESS_TYPES)
|
|
return -EINVAL;
|
|
if (range->compress_type)
|
|
compress_type = range->compress_type;
|
|
}
|
|
|
|
if (isize == 0)
|
|
return 0;
|
|
|
|
/*
|
|
* if we were not given a file, allocate a readahead
|
|
* context
|
|
*/
|
|
if (!file) {
|
|
ra = kzalloc(sizeof(*ra), GFP_NOFS);
|
|
if (!ra)
|
|
return -ENOMEM;
|
|
file_ra_state_init(ra, inode->i_mapping);
|
|
} else {
|
|
ra = &file->f_ra;
|
|
}
|
|
|
|
pages = kmalloc(sizeof(struct page *) * max_cluster,
|
|
GFP_NOFS);
|
|
if (!pages) {
|
|
ret = -ENOMEM;
|
|
goto out_ra;
|
|
}
|
|
|
|
/* find the last page to defrag */
|
|
if (range->start + range->len > range->start) {
|
|
last_index = min_t(u64, isize - 1,
|
|
range->start + range->len - 1) >> PAGE_CACHE_SHIFT;
|
|
} else {
|
|
last_index = (isize - 1) >> PAGE_CACHE_SHIFT;
|
|
}
|
|
|
|
if (newer_than) {
|
|
ret = find_new_extents(root, inode, newer_than,
|
|
&newer_off, 64 * 1024);
|
|
if (!ret) {
|
|
range->start = newer_off;
|
|
/*
|
|
* we always align our defrag to help keep
|
|
* the extents in the file evenly spaced
|
|
*/
|
|
i = (newer_off & new_align) >> PAGE_CACHE_SHIFT;
|
|
} else
|
|
goto out_ra;
|
|
} else {
|
|
i = range->start >> PAGE_CACHE_SHIFT;
|
|
}
|
|
if (!max_to_defrag)
|
|
max_to_defrag = last_index + 1;
|
|
|
|
/*
|
|
* make writeback starts from i, so the defrag range can be
|
|
* written sequentially.
|
|
*/
|
|
if (i < inode->i_mapping->writeback_index)
|
|
inode->i_mapping->writeback_index = i;
|
|
|
|
while (i <= last_index && defrag_count < max_to_defrag &&
|
|
(i < (i_size_read(inode) + PAGE_CACHE_SIZE - 1) >>
|
|
PAGE_CACHE_SHIFT)) {
|
|
/*
|
|
* make sure we stop running if someone unmounts
|
|
* the FS
|
|
*/
|
|
if (!(inode->i_sb->s_flags & MS_ACTIVE))
|
|
break;
|
|
|
|
if (!should_defrag_range(inode, (u64)i << PAGE_CACHE_SHIFT,
|
|
extent_thresh, &last_len, &skip,
|
|
&defrag_end, range->flags &
|
|
BTRFS_DEFRAG_RANGE_COMPRESS)) {
|
|
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;
|
|
}
|
|
|
|
if (!newer_than) {
|
|
cluster = (PAGE_CACHE_ALIGN(defrag_end) >>
|
|
PAGE_CACHE_SHIFT) - i;
|
|
cluster = min(cluster, max_cluster);
|
|
} else {
|
|
cluster = max_cluster;
|
|
}
|
|
|
|
if (range->flags & BTRFS_DEFRAG_RANGE_COMPRESS)
|
|
BTRFS_I(inode)->force_compress = compress_type;
|
|
|
|
if (i + cluster > ra_index) {
|
|
ra_index = max(i, ra_index);
|
|
btrfs_force_ra(inode->i_mapping, ra, file, ra_index,
|
|
cluster);
|
|
ra_index += max_cluster;
|
|
}
|
|
|
|
mutex_lock(&inode->i_mutex);
|
|
ret = cluster_pages_for_defrag(inode, pages, i, cluster);
|
|
if (ret < 0) {
|
|
mutex_unlock(&inode->i_mutex);
|
|
goto out_ra;
|
|
}
|
|
|
|
defrag_count += ret;
|
|
balance_dirty_pages_ratelimited(inode->i_mapping);
|
|
mutex_unlock(&inode->i_mutex);
|
|
|
|
if (newer_than) {
|
|
if (newer_off == (u64)-1)
|
|
break;
|
|
|
|
if (ret > 0)
|
|
i += ret;
|
|
|
|
newer_off = max(newer_off + 1,
|
|
(u64)i << PAGE_CACHE_SHIFT);
|
|
|
|
ret = find_new_extents(root, inode,
|
|
newer_than, &newer_off,
|
|
64 * 1024);
|
|
if (!ret) {
|
|
range->start = newer_off;
|
|
i = (newer_off & new_align) >> PAGE_CACHE_SHIFT;
|
|
} else {
|
|
break;
|
|
}
|
|
} else {
|
|
if (ret > 0) {
|
|
i += ret;
|
|
last_len += ret << PAGE_CACHE_SHIFT;
|
|
} else {
|
|
i++;
|
|
last_len = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
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 = BTRFS_COMPRESS_NONE;
|
|
mutex_unlock(&inode->i_mutex);
|
|
}
|
|
|
|
if (range->compress_type == BTRFS_COMPRESS_LZO) {
|
|
btrfs_set_fs_incompat(root->fs_info, COMPRESS_LZO);
|
|
}
|
|
|
|
ret = defrag_count;
|
|
|
|
out_ra:
|
|
if (!file)
|
|
kfree(ra);
|
|
kfree(pages);
|
|
return ret;
|
|
}
|
|
|
|
static noinline int btrfs_ioctl_resize(struct file *file,
|
|
void __user *arg)
|
|
{
|
|
u64 new_size;
|
|
u64 old_size;
|
|
u64 devid = 1;
|
|
struct btrfs_root *root = BTRFS_I(fdentry(file)->d_inode)->root;
|
|
struct btrfs_ioctl_vol_args *vol_args;
|
|
struct btrfs_trans_handle *trans;
|
|
struct btrfs_device *device = NULL;
|
|
char *sizestr;
|
|
char *devstr = NULL;
|
|
int ret = 0;
|
|
int mod = 0;
|
|
|
|
if (root->fs_info->sb->s_flags & MS_RDONLY)
|
|
return -EROFS;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
ret = mnt_want_write_file(file);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (atomic_xchg(&root->fs_info->mutually_exclusive_operation_running,
|
|
1)) {
|
|
pr_info("btrfs: dev add/delete/balance/replace/resize operation in progress\n");
|
|
return -EINPROGRESS;
|
|
}
|
|
|
|
mutex_lock(&root->fs_info->volume_mutex);
|
|
vol_args = memdup_user(arg, sizeof(*vol_args));
|
|
if (IS_ERR(vol_args)) {
|
|
ret = PTR_ERR(vol_args);
|
|
goto out;
|
|
}
|
|
|
|
vol_args->name[BTRFS_PATH_NAME_MAX] = '\0';
|
|
|
|
sizestr = vol_args->name;
|
|
devstr = strchr(sizestr, ':');
|
|
if (devstr) {
|
|
char *end;
|
|
sizestr = devstr + 1;
|
|
*devstr = '\0';
|
|
devstr = vol_args->name;
|
|
devid = simple_strtoull(devstr, &end, 10);
|
|
printk(KERN_INFO "btrfs: resizing devid %llu\n",
|
|
(unsigned long long)devid);
|
|
}
|
|
device = btrfs_find_device(root->fs_info, devid, NULL, NULL);
|
|
if (!device) {
|
|
printk(KERN_INFO "btrfs: resizer unable to find device %llu\n",
|
|
(unsigned long long)devid);
|
|
ret = -EINVAL;
|
|
goto out_free;
|
|
}
|
|
if (device->fs_devices && device->fs_devices->seeding) {
|
|
printk(KERN_INFO "btrfs: resizer unable to apply on "
|
|
"seeding device %llu\n",
|
|
(unsigned long long)devid);
|
|
ret = -EINVAL;
|
|
goto out_free;
|
|
}
|
|
|
|
if (!strcmp(sizestr, "max"))
|
|
new_size = device->bdev->bd_inode->i_size;
|
|
else {
|
|
if (sizestr[0] == '-') {
|
|
mod = -1;
|
|
sizestr++;
|
|
} else if (sizestr[0] == '+') {
|
|
mod = 1;
|
|
sizestr++;
|
|
}
|
|
new_size = memparse(sizestr, NULL);
|
|
if (new_size == 0) {
|
|
ret = -EINVAL;
|
|
goto out_free;
|
|
}
|
|
}
|
|
|
|
if (device->is_tgtdev_for_dev_replace) {
|
|
ret = -EINVAL;
|
|
goto out_free;
|
|
}
|
|
|
|
old_size = device->total_bytes;
|
|
|
|
if (mod < 0) {
|
|
if (new_size > old_size) {
|
|
ret = -EINVAL;
|
|
goto out_free;
|
|
}
|
|
new_size = old_size - new_size;
|
|
} else if (mod > 0) {
|
|
new_size = old_size + new_size;
|
|
}
|
|
|
|
if (new_size < 256 * 1024 * 1024) {
|
|
ret = -EINVAL;
|
|
goto out_free;
|
|
}
|
|
if (new_size > device->bdev->bd_inode->i_size) {
|
|
ret = -EFBIG;
|
|
goto out_free;
|
|
}
|
|
|
|
do_div(new_size, root->sectorsize);
|
|
new_size *= root->sectorsize;
|
|
|
|
printk_in_rcu(KERN_INFO "btrfs: new size for %s is %llu\n",
|
|
rcu_str_deref(device->name),
|
|
(unsigned long long)new_size);
|
|
|
|
if (new_size > old_size) {
|
|
trans = btrfs_start_transaction(root, 0);
|
|
if (IS_ERR(trans)) {
|
|
ret = PTR_ERR(trans);
|
|
goto out_free;
|
|
}
|
|
ret = btrfs_grow_device(trans, device, new_size);
|
|
btrfs_commit_transaction(trans, root);
|
|
} else if (new_size < old_size) {
|
|
ret = btrfs_shrink_device(device, new_size);
|
|
} /* equal, nothing need to do */
|
|
|
|
out_free:
|
|
kfree(vol_args);
|
|
out:
|
|
mutex_unlock(&root->fs_info->volume_mutex);
|
|
mnt_drop_write_file(file);
|
|
atomic_set(&root->fs_info->mutually_exclusive_operation_running, 0);
|
|
return ret;
|
|
}
|
|
|
|
static noinline int btrfs_ioctl_snap_create_transid(struct file *file,
|
|
char *name, unsigned long fd, int subvol,
|
|
u64 *transid, bool readonly,
|
|
struct btrfs_qgroup_inherit **inherit)
|
|
{
|
|
int namelen;
|
|
int ret = 0;
|
|
|
|
ret = mnt_want_write_file(file);
|
|
if (ret)
|
|
goto out;
|
|
|
|
namelen = strlen(name);
|
|
if (strchr(name, '/')) {
|
|
ret = -EINVAL;
|
|
goto out_drop_write;
|
|
}
|
|
|
|
if (name[0] == '.' &&
|
|
(namelen == 1 || (name[1] == '.' && namelen == 2))) {
|
|
ret = -EEXIST;
|
|
goto out_drop_write;
|
|
}
|
|
|
|
if (subvol) {
|
|
ret = btrfs_mksubvol(&file->f_path, name, namelen,
|
|
NULL, transid, readonly, inherit);
|
|
} else {
|
|
struct fd src = fdget(fd);
|
|
struct inode *src_inode;
|
|
if (!src.file) {
|
|
ret = -EINVAL;
|
|
goto out_drop_write;
|
|
}
|
|
|
|
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;
|
|
} else {
|
|
ret = btrfs_mksubvol(&file->f_path, name, namelen,
|
|
BTRFS_I(src_inode)->root,
|
|
transid, readonly, inherit);
|
|
}
|
|
fdput(src);
|
|
}
|
|
out_drop_write:
|
|
mnt_drop_write_file(file);
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static noinline int btrfs_ioctl_snap_create(struct file *file,
|
|
void __user *arg, int subvol)
|
|
{
|
|
struct btrfs_ioctl_vol_args *vol_args;
|
|
int ret;
|
|
|
|
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_ioctl_snap_create_transid(file, vol_args->name,
|
|
vol_args->fd, subvol,
|
|
NULL, false, NULL);
|
|
|
|
kfree(vol_args);
|
|
return ret;
|
|
}
|
|
|
|
static noinline int btrfs_ioctl_snap_create_v2(struct file *file,
|
|
void __user *arg, int subvol)
|
|
{
|
|
struct btrfs_ioctl_vol_args_v2 *vol_args;
|
|
int ret;
|
|
u64 transid = 0;
|
|
u64 *ptr = NULL;
|
|
bool readonly = false;
|
|
struct btrfs_qgroup_inherit *inherit = NULL;
|
|
|
|
vol_args = memdup_user(arg, sizeof(*vol_args));
|
|
if (IS_ERR(vol_args))
|
|
return PTR_ERR(vol_args);
|
|
vol_args->name[BTRFS_SUBVOL_NAME_MAX] = '\0';
|
|
|
|
if (vol_args->flags &
|
|
~(BTRFS_SUBVOL_CREATE_ASYNC | BTRFS_SUBVOL_RDONLY |
|
|
BTRFS_SUBVOL_QGROUP_INHERIT)) {
|
|
ret = -EOPNOTSUPP;
|
|
goto out;
|
|
}
|
|
|
|
if (vol_args->flags & BTRFS_SUBVOL_CREATE_ASYNC)
|
|
ptr = &transid;
|
|
if (vol_args->flags & BTRFS_SUBVOL_RDONLY)
|
|
readonly = true;
|
|
if (vol_args->flags & BTRFS_SUBVOL_QGROUP_INHERIT) {
|
|
if (vol_args->size > PAGE_CACHE_SIZE) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
inherit = memdup_user(vol_args->qgroup_inherit, vol_args->size);
|
|
if (IS_ERR(inherit)) {
|
|
ret = PTR_ERR(inherit);
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
ret = btrfs_ioctl_snap_create_transid(file, vol_args->name,
|
|
vol_args->fd, subvol, ptr,
|
|
readonly, &inherit);
|
|
|
|
if (ret == 0 && ptr &&
|
|
copy_to_user(arg +
|
|
offsetof(struct btrfs_ioctl_vol_args_v2,
|
|
transid), ptr, sizeof(*ptr)))
|
|
ret = -EFAULT;
|
|
out:
|
|
kfree(vol_args);
|
|
kfree(inherit);
|
|
return ret;
|
|
}
|
|
|
|
static noinline int btrfs_ioctl_subvol_getflags(struct file *file,
|
|
void __user *arg)
|
|
{
|
|
struct inode *inode = fdentry(file)->d_inode;
|
|
struct btrfs_root *root = BTRFS_I(inode)->root;
|
|
int ret = 0;
|
|
u64 flags = 0;
|
|
|
|
if (btrfs_ino(inode) != BTRFS_FIRST_FREE_OBJECTID)
|
|
return -EINVAL;
|
|
|
|
down_read(&root->fs_info->subvol_sem);
|
|
if (btrfs_root_readonly(root))
|
|
flags |= BTRFS_SUBVOL_RDONLY;
|
|
up_read(&root->fs_info->subvol_sem);
|
|
|
|
if (copy_to_user(arg, &flags, sizeof(flags)))
|
|
ret = -EFAULT;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static noinline int btrfs_ioctl_subvol_setflags(struct file *file,
|
|
void __user *arg)
|
|
{
|
|
struct inode *inode = fdentry(file)->d_inode;
|
|
struct btrfs_root *root = BTRFS_I(inode)->root;
|
|
struct btrfs_trans_handle *trans;
|
|
u64 root_flags;
|
|
u64 flags;
|
|
int ret = 0;
|
|
|
|
ret = mnt_want_write_file(file);
|
|
if (ret)
|
|
goto out;
|
|
|
|
if (btrfs_ino(inode) != BTRFS_FIRST_FREE_OBJECTID) {
|
|
ret = -EINVAL;
|
|
goto out_drop_write;
|
|
}
|
|
|
|
if (copy_from_user(&flags, arg, sizeof(flags))) {
|
|
ret = -EFAULT;
|
|
goto out_drop_write;
|
|
}
|
|
|
|
if (flags & BTRFS_SUBVOL_CREATE_ASYNC) {
|
|
ret = -EINVAL;
|
|
goto out_drop_write;
|
|
}
|
|
|
|
if (flags & ~BTRFS_SUBVOL_RDONLY) {
|
|
ret = -EOPNOTSUPP;
|
|
goto out_drop_write;
|
|
}
|
|
|
|
if (!inode_owner_or_capable(inode)) {
|
|
ret = -EACCES;
|
|
goto out_drop_write;
|
|
}
|
|
|
|
down_write(&root->fs_info->subvol_sem);
|
|
|
|
/* nothing to do */
|
|
if (!!(flags & BTRFS_SUBVOL_RDONLY) == btrfs_root_readonly(root))
|
|
goto out_drop_sem;
|
|
|
|
root_flags = btrfs_root_flags(&root->root_item);
|
|
if (flags & BTRFS_SUBVOL_RDONLY)
|
|
btrfs_set_root_flags(&root->root_item,
|
|
root_flags | BTRFS_ROOT_SUBVOL_RDONLY);
|
|
else
|
|
btrfs_set_root_flags(&root->root_item,
|
|
root_flags & ~BTRFS_ROOT_SUBVOL_RDONLY);
|
|
|
|
trans = btrfs_start_transaction(root, 1);
|
|
if (IS_ERR(trans)) {
|
|
ret = PTR_ERR(trans);
|
|
goto out_reset;
|
|
}
|
|
|
|
ret = btrfs_update_root(trans, root->fs_info->tree_root,
|
|
&root->root_key, &root->root_item);
|
|
|
|
btrfs_commit_transaction(trans, root);
|
|
out_reset:
|
|
if (ret)
|
|
btrfs_set_root_flags(&root->root_item, root_flags);
|
|
out_drop_sem:
|
|
up_write(&root->fs_info->subvol_sem);
|
|
out_drop_write:
|
|
mnt_drop_write_file(file);
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
|
|
path = btrfs_alloc_path();
|
|
if (!path)
|
|
return -ENOMEM;
|
|
|
|
key.objectid = root->root_key.objectid;
|
|
key.type = BTRFS_ROOT_REF_KEY;
|
|
key.offset = (u64)-1;
|
|
|
|
ret = btrfs_search_slot(NULL, root->fs_info->tree_root,
|
|
&key, path, 0, 0);
|
|
if (ret < 0)
|
|
goto out;
|
|
BUG_ON(ret == 0);
|
|
|
|
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:
|
|
btrfs_free_path(path);
|
|
return ret;
|
|
}
|
|
|
|
static noinline int key_in_sk(struct btrfs_key *key,
|
|
struct btrfs_ioctl_search_key *sk)
|
|
{
|
|
struct btrfs_key test;
|
|
int ret;
|
|
|
|
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 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);
|
|
|
|
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;
|
|
}
|
|
(*num_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:
|
|
return ret;
|
|
}
|
|
|
|
static noinline int search_ioctl(struct inode *inode,
|
|
struct btrfs_ioctl_search_args *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(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;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
args = memdup_user(argp, sizeof(*args));
|
|
if (IS_ERR(args))
|
|
return PTR_ERR(args);
|
|
|
|
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;
|
|
}
|
|
|
|
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(path);
|
|
key.objectid = key.offset;
|
|
key.offset = (u64)-1;
|
|
dirid = key.objectid;
|
|
}
|
|
if (ptr < name)
|
|
goto out;
|
|
memmove(name, ptr, total_len);
|
|
name[total_len]='\0';
|
|
ret = 0;
|
|
out:
|
|
btrfs_free_path(path);
|
|
return ret;
|
|
}
|
|
|
|
static noinline int btrfs_ioctl_ino_lookup(struct file *file,
|
|
void __user *argp)
|
|
{
|
|
struct btrfs_ioctl_ino_lookup_args *args;
|
|
struct inode *inode;
|
|
int ret;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
args = memdup_user(argp, sizeof(*args));
|
|
if (IS_ERR(args))
|
|
return PTR_ERR(args);
|
|
|
|
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;
|
|
|
|
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;
|
|
}
|
|
|
|
err = mnt_want_write_file(file);
|
|
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;
|
|
dest = BTRFS_I(inode)->root;
|
|
if (!capable(CAP_SYS_ADMIN)){
|
|
/*
|
|
* Regular user. Only allow this with a special mount
|
|
* option, when the user has write+exec access to the
|
|
* subvol root, and when rmdir(2) would have been
|
|
* allowed.
|
|
*
|
|
* Note that this is _not_ check that the subvol is
|
|
* empty or doesn't contain data that we wouldn't
|
|
* otherwise be able to delete.
|
|
*
|
|
* Users who want to delete empty subvols should try
|
|
* rmdir(2).
|
|
*/
|
|
err = -EPERM;
|
|
if (!btrfs_test_opt(root, USER_SUBVOL_RM_ALLOWED))
|
|
goto out_dput;
|
|
|
|
/*
|
|
* Do not allow deletion if the parent dir is the same
|
|
* as the dir to be deleted. That means the ioctl
|
|
* must be called on the dentry referencing the root
|
|
* of the subvol, not a random directory contained
|
|
* within it.
|
|
*/
|
|
err = -EINVAL;
|
|
if (root == dest)
|
|
goto out_dput;
|
|
|
|
err = inode_permission(inode, MAY_WRITE | MAY_EXEC);
|
|
if (err)
|
|
goto out_dput;
|
|
|
|
/* check if subvolume may be deleted by a non-root user */
|
|
err = btrfs_may_delete(dir, dentry, 1);
|
|
if (err)
|
|
goto out_dput;
|
|
}
|
|
|
|
if (btrfs_ino(inode) != BTRFS_FIRST_FREE_OBJECTID) {
|
|
err = -EINVAL;
|
|
goto out_dput;
|
|
}
|
|
|
|
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_up_write;
|
|
}
|
|
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);
|
|
if (ret) {
|
|
err = ret;
|
|
btrfs_abort_transaction(trans, root, ret);
|
|
goto out_end_trans;
|
|
}
|
|
|
|
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);
|
|
|
|
if (!xchg(&dest->orphan_item_inserted, 1)) {
|
|
ret = btrfs_insert_orphan_item(trans,
|
|
root->fs_info->tree_root,
|
|
dest->root_key.objectid);
|
|
if (ret) {
|
|
btrfs_abort_transaction(trans, root, ret);
|
|
err = ret;
|
|
goto out_end_trans;
|
|
}
|
|
}
|
|
out_end_trans:
|
|
ret = btrfs_end_transaction(trans, root);
|
|
if (ret && !err)
|
|
err = 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(file);
|
|
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;
|
|
|
|
if (btrfs_root_readonly(root))
|
|
return -EROFS;
|
|
|
|
if (atomic_xchg(&root->fs_info->mutually_exclusive_operation_running,
|
|
1)) {
|
|
pr_info("btrfs: dev add/delete/balance/replace/resize operation in progress\n");
|
|
return -EINPROGRESS;
|
|
}
|
|
ret = mnt_want_write_file(file);
|
|
if (ret) {
|
|
atomic_set(&root->fs_info->mutually_exclusive_operation_running,
|
|
0);
|
|
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(fdentry(file)->d_inode, file,
|
|
range, 0, 0);
|
|
if (ret > 0)
|
|
ret = 0;
|
|
kfree(range);
|
|
break;
|
|
default:
|
|
ret = -EINVAL;
|
|
}
|
|
out:
|
|
mnt_drop_write_file(file);
|
|
atomic_set(&root->fs_info->mutually_exclusive_operation_running, 0);
|
|
return ret;
|
|
}
|
|
|
|
static long btrfs_ioctl_add_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 (atomic_xchg(&root->fs_info->mutually_exclusive_operation_running,
|
|
1)) {
|
|
pr_info("btrfs: dev add/delete/balance/replace/resize operation in progress\n");
|
|
return -EINPROGRESS;
|
|
}
|
|
|
|
mutex_lock(&root->fs_info->volume_mutex);
|
|
vol_args = memdup_user(arg, sizeof(*vol_args));
|
|
if (IS_ERR(vol_args)) {
|
|
ret = PTR_ERR(vol_args);
|
|
goto out;
|
|
}
|
|
|
|
vol_args->name[BTRFS_PATH_NAME_MAX] = '\0';
|
|
ret = btrfs_init_new_device(root, vol_args->name);
|
|
|
|
kfree(vol_args);
|
|
out:
|
|
mutex_unlock(&root->fs_info->volume_mutex);
|
|
atomic_set(&root->fs_info->mutually_exclusive_operation_running, 0);
|
|
return ret;
|
|
}
|
|
|
|
static long btrfs_ioctl_rm_dev(struct file *file, void __user *arg)
|
|
{
|
|
struct btrfs_root *root = BTRFS_I(fdentry(file)->d_inode)->root;
|
|
struct btrfs_ioctl_vol_args *vol_args;
|
|
int ret;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
ret = mnt_want_write_file(file);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (atomic_xchg(&root->fs_info->mutually_exclusive_operation_running,
|
|
1)) {
|
|
pr_info("btrfs: dev add/delete/balance/replace/resize operation in progress\n");
|
|
mnt_drop_write_file(file);
|
|
return -EINPROGRESS;
|
|
}
|
|
|
|
mutex_lock(&root->fs_info->volume_mutex);
|
|
vol_args = memdup_user(arg, sizeof(*vol_args));
|
|
if (IS_ERR(vol_args)) {
|
|
ret = PTR_ERR(vol_args);
|
|
goto out;
|
|
}
|
|
|
|
vol_args->name[BTRFS_PATH_NAME_MAX] = '\0';
|
|
ret = btrfs_rm_device(root, vol_args->name);
|
|
|
|
kfree(vol_args);
|
|
out:
|
|
mutex_unlock(&root->fs_info->volume_mutex);
|
|
mnt_drop_write_file(file);
|
|
atomic_set(&root->fs_info->mutually_exclusive_operation_running, 0);
|
|
return ret;
|
|
}
|
|
|
|
static long btrfs_ioctl_fs_info(struct btrfs_root *root, void __user *arg)
|
|
{
|
|
struct btrfs_ioctl_fs_info_args *fi_args;
|
|
struct btrfs_device *device;
|
|
struct btrfs_device *next;
|
|
struct btrfs_fs_devices *fs_devices = root->fs_info->fs_devices;
|
|
int ret = 0;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
fi_args = kzalloc(sizeof(*fi_args), GFP_KERNEL);
|
|
if (!fi_args)
|
|
return -ENOMEM;
|
|
|
|
fi_args->num_devices = fs_devices->num_devices;
|
|
memcpy(&fi_args->fsid, root->fs_info->fsid, sizeof(fi_args->fsid));
|
|
|
|
mutex_lock(&fs_devices->device_list_mutex);
|
|
list_for_each_entry_safe(device, next, &fs_devices->devices, dev_list) {
|
|
if (device->devid > fi_args->max_id)
|
|
fi_args->max_id = device->devid;
|
|
}
|
|
mutex_unlock(&fs_devices->device_list_mutex);
|
|
|
|
if (copy_to_user(arg, fi_args, sizeof(*fi_args)))
|
|
ret = -EFAULT;
|
|
|
|
kfree(fi_args);
|
|
return ret;
|
|
}
|
|
|
|
static long btrfs_ioctl_dev_info(struct btrfs_root *root, void __user *arg)
|
|
{
|
|
struct btrfs_ioctl_dev_info_args *di_args;
|
|
struct btrfs_device *dev;
|
|
struct btrfs_fs_devices *fs_devices = root->fs_info->fs_devices;
|
|
int ret = 0;
|
|
char *s_uuid = NULL;
|
|
char empty_uuid[BTRFS_UUID_SIZE] = {0};
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
di_args = memdup_user(arg, sizeof(*di_args));
|
|
if (IS_ERR(di_args))
|
|
return PTR_ERR(di_args);
|
|
|
|
if (memcmp(empty_uuid, di_args->uuid, BTRFS_UUID_SIZE) != 0)
|
|
s_uuid = di_args->uuid;
|
|
|
|
mutex_lock(&fs_devices->device_list_mutex);
|
|
dev = btrfs_find_device(root->fs_info, di_args->devid, s_uuid, NULL);
|
|
mutex_unlock(&fs_devices->device_list_mutex);
|
|
|
|
if (!dev) {
|
|
ret = -ENODEV;
|
|
goto out;
|
|
}
|
|
|
|
di_args->devid = dev->devid;
|
|
di_args->bytes_used = dev->bytes_used;
|
|
di_args->total_bytes = dev->total_bytes;
|
|
memcpy(di_args->uuid, dev->uuid, sizeof(di_args->uuid));
|
|
if (dev->name) {
|
|
struct rcu_string *name;
|
|
|
|
rcu_read_lock();
|
|
name = rcu_dereference(dev->name);
|
|
strncpy(di_args->path, name->str, sizeof(di_args->path));
|
|
rcu_read_unlock();
|
|
di_args->path[sizeof(di_args->path) - 1] = 0;
|
|
} else {
|
|
di_args->path[0] = '\0';
|
|
}
|
|
|
|
out:
|
|
if (ret == 0 && copy_to_user(arg, di_args, sizeof(*di_args)))
|
|
ret = -EFAULT;
|
|
|
|
kfree(di_args);
|
|
return ret;
|
|
}
|
|
|
|
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 fd src_file;
|
|
struct inode *src;
|
|
struct btrfs_trans_handle *trans;
|
|
struct btrfs_path *path;
|
|
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;
|
|
|
|
/*
|
|
* 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) || (file->f_flags & O_APPEND))
|
|
return -EINVAL;
|
|
|
|
if (btrfs_root_readonly(root))
|
|
return -EROFS;
|
|
|
|
ret = mnt_want_write_file(file);
|
|
if (ret)
|
|
return ret;
|
|
|
|
src_file = fdget(srcfd);
|
|
if (!src_file.file) {
|
|
ret = -EBADF;
|
|
goto out_drop_write;
|
|
}
|
|
|
|
ret = -EXDEV;
|
|
if (src_file.file->f_path.mnt != file->f_path.mnt)
|
|
goto out_fput;
|
|
|
|
src = src_file.file->f_dentry->d_inode;
|
|
|
|
ret = -EINVAL;
|
|
if (src == inode)
|
|
goto out_fput;
|
|
|
|
/* the src must be open for reading */
|
|
if (!(src_file.file->f_mode & FMODE_READ))
|
|
goto out_fput;
|
|
|
|
/* don't make the dst file partly checksummed */
|
|
if ((BTRFS_I(src)->flags & BTRFS_INODE_NODATASUM) !=
|
|
(BTRFS_I(inode)->flags & BTRFS_INODE_NODATASUM))
|
|
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)
|
|
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_nested(&inode->i_mutex, I_MUTEX_PARENT);
|
|
mutex_lock_nested(&src->i_mutex, I_MUTEX_CHILD);
|
|
} else {
|
|
mutex_lock_nested(&src->i_mutex, I_MUTEX_PARENT);
|
|
mutex_lock_nested(&inode->i_mutex, I_MUTEX_CHILD);
|
|
}
|
|
|
|
/* determine range to clone */
|
|
ret = -EINVAL;
|
|
if (off + len > src->i_size || off + len < off)
|
|
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 = ALIGN(src->i_size, bs) - off;
|
|
|
|
/* verify the end result is block aligned */
|
|
if (!IS_ALIGNED(off, bs) || !IS_ALIGNED(off + len, bs) ||
|
|
!IS_ALIGNED(destoff, bs))
|
|
goto out_unlock;
|
|
|
|
if (destoff > inode->i_size) {
|
|
ret = btrfs_cont_expand(inode, inode->i_size, destoff);
|
|
if (ret)
|
|
goto out_unlock;
|
|
}
|
|
|
|
/* truncate page cache pages from target inode range */
|
|
truncate_inode_pages_range(&inode->i_data, destoff,
|
|
PAGE_CACHE_ALIGN(destoff + len) - 1);
|
|
|
|
/* do any pending delalloc/csum calc on src, one way or
|
|
another, and lock file content */
|
|
while (1) {
|
|
struct btrfs_ordered_extent *ordered;
|
|
lock_extent(&BTRFS_I(src)->io_tree, off, off + len - 1);
|
|
ordered = btrfs_lookup_first_ordered_extent(src, off + len - 1);
|
|
if (!ordered &&
|
|
!test_range_bit(&BTRFS_I(src)->io_tree, off, off + len - 1,
|
|
EXTENT_DELALLOC, 0, NULL))
|
|
break;
|
|
unlock_extent(&BTRFS_I(src)->io_tree, off, off + len - 1);
|
|
if (ordered)
|
|
btrfs_put_ordered_extent(ordered);
|
|
btrfs_wait_ordered_range(src, off, len);
|
|
}
|
|
|
|
/* clone data */
|
|
key.objectid = btrfs_ino(src);
|
|
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(NULL, BTRFS_I(src)->root, &key, path,
|
|
0, 0);
|
|
if (ret < 0)
|
|
goto out;
|
|
|
|
nritems = btrfs_header_nritems(path->nodes[0]);
|
|
if (path->slots[0] >= nritems) {
|
|
ret = btrfs_next_leaf(BTRFS_I(src)->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);
|
|
if (btrfs_key_type(&key) > BTRFS_EXTENT_DATA_KEY ||
|
|
key.objectid != btrfs_ino(src))
|
|
break;
|
|
|
|
if (btrfs_key_type(&key) == BTRFS_EXTENT_DATA_KEY) {
|
|
struct btrfs_file_extent_item *extent;
|
|
int type;
|
|
u32 size;
|
|
struct btrfs_key new_key;
|
|
u64 disko = 0, diskl = 0;
|
|
u64 datao = 0, datal = 0;
|
|
u8 comp;
|
|
u64 endoff;
|
|
|
|
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);
|
|
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);
|
|
diskl = btrfs_file_extent_disk_num_bytes(leaf,
|
|
extent);
|
|
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(path);
|
|
|
|
if (key.offset + datal <= off ||
|
|
key.offset >= off + len - 1)
|
|
goto next;
|
|
|
|
memcpy(&new_key, &key, sizeof(new_key));
|
|
new_key.objectid = btrfs_ino(inode);
|
|
if (off <= key.offset)
|
|
new_key.offset = key.offset + destoff - off;
|
|
else
|
|
new_key.offset = destoff;
|
|
|
|
/*
|
|
* 1 - adjusting old extent (we may have to split it)
|
|
* 1 - add new extent
|
|
* 1 - inode update
|
|
*/
|
|
trans = btrfs_start_transaction(root, 3);
|
|
if (IS_ERR(trans)) {
|
|
ret = PTR_ERR(trans);
|
|
goto out;
|
|
}
|
|
|
|
if (type == BTRFS_FILE_EXTENT_REG ||
|
|
type == BTRFS_FILE_EXTENT_PREALLOC) {
|
|
/*
|
|
* a | --- range to clone ---| b
|
|
* | ------------- extent ------------- |
|
|
*/
|
|
|
|
/* substract range b */
|
|
if (key.offset + datal > off + len)
|
|
datal = off + len - key.offset;
|
|
|
|
/* substract range a */
|
|
if (off > key.offset) {
|
|
datao += off - key.offset;
|
|
datal -= off - key.offset;
|
|
}
|
|
|
|
ret = btrfs_drop_extents(trans, root, inode,
|
|
new_key.offset,
|
|
new_key.offset + datal,
|
|
1);
|
|
if (ret) {
|
|
btrfs_abort_transaction(trans, root,
|
|
ret);
|
|
btrfs_end_transaction(trans, root);
|
|
goto out;
|
|
}
|
|
|
|
ret = btrfs_insert_empty_item(trans, root, path,
|
|
&new_key, size);
|
|
if (ret) {
|
|
btrfs_abort_transaction(trans, root,
|
|
ret);
|
|
btrfs_end_transaction(trans, root);
|
|
goto out;
|
|
}
|
|
|
|
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,
|
|
btrfs_ino(inode),
|
|
new_key.offset - datao,
|
|
0);
|
|
if (ret) {
|
|
btrfs_abort_transaction(trans,
|
|
root,
|
|
ret);
|
|
btrfs_end_transaction(trans,
|
|
root);
|
|
goto out;
|
|
|
|
}
|
|
}
|
|
} 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;
|
|
}
|
|
size -= skip + trim;
|
|
datal -= skip + trim;
|
|
|
|
ret = btrfs_drop_extents(trans, root, inode,
|
|
new_key.offset,
|
|
new_key.offset + datal,
|
|
1);
|
|
if (ret) {
|
|
btrfs_abort_transaction(trans, root,
|
|
ret);
|
|
btrfs_end_transaction(trans, root);
|
|
goto out;
|
|
}
|
|
|
|
ret = btrfs_insert_empty_item(trans, root, path,
|
|
&new_key, size);
|
|
if (ret) {
|
|
btrfs_abort_transaction(trans, root,
|
|
ret);
|
|
btrfs_end_transaction(trans, root);
|
|
goto out;
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
btrfs_mark_buffer_dirty(leaf);
|
|
btrfs_release_path(path);
|
|
|
|
inode_inc_iversion(inode);
|
|
inode->i_mtime = inode->i_ctime = CURRENT_TIME;
|
|
|
|
/*
|
|
* we round up to the block size at eof when
|
|
* determining which extents to clone above,
|
|
* but shouldn't round up the file size
|
|
*/
|
|
endoff = new_key.offset + datal;
|
|
if (endoff > destoff+olen)
|
|
endoff = destoff+olen;
|
|
if (endoff > inode->i_size)
|
|
btrfs_i_size_write(inode, endoff);
|
|
|
|
ret = btrfs_update_inode(trans, root, inode);
|
|
if (ret) {
|
|
btrfs_abort_transaction(trans, root, ret);
|
|
btrfs_end_transaction(trans, root);
|
|
goto out;
|
|
}
|
|
ret = btrfs_end_transaction(trans, root);
|
|
}
|
|
next:
|
|
btrfs_release_path(path);
|
|
key.offset++;
|
|
}
|
|
ret = 0;
|
|
out:
|
|
btrfs_release_path(path);
|
|
unlock_extent(&BTRFS_I(src)->io_tree, off, off + len - 1);
|
|
out_unlock:
|
|
mutex_unlock(&src->i_mutex);
|
|
mutex_unlock(&inode->i_mutex);
|
|
vfree(buf);
|
|
btrfs_free_path(path);
|
|
out_fput:
|
|
fdput(src_file);
|
|
out_drop_write:
|
|
mnt_drop_write_file(file);
|
|
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.
|
|
*/
|
|
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;
|
|
|
|
ret = -EPERM;
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
goto out;
|
|
|
|
ret = -EINPROGRESS;
|
|
if (file->private_data)
|
|
goto out;
|
|
|
|
ret = -EROFS;
|
|
if (btrfs_root_readonly(root))
|
|
goto out;
|
|
|
|
ret = mnt_want_write_file(file);
|
|
if (ret)
|
|
goto out;
|
|
|
|
atomic_inc(&root->fs_info->open_ioctl_trans);
|
|
|
|
ret = -ENOMEM;
|
|
trans = btrfs_start_ioctl_transaction(root);
|
|
if (IS_ERR(trans))
|
|
goto out_drop;
|
|
|
|
file->private_data = trans;
|
|
return 0;
|
|
|
|
out_drop:
|
|
atomic_dec(&root->fs_info->open_ioctl_trans);
|
|
mnt_drop_write_file(file);
|
|
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;
|
|
u64 objectid = 0;
|
|
u64 dir_id;
|
|
int ret;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
ret = mnt_want_write_file(file);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (copy_from_user(&objectid, argp, sizeof(objectid))) {
|
|
ret = -EFAULT;
|
|
goto out;
|
|
}
|
|
|
|
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)) {
|
|
ret = PTR_ERR(new_root);
|
|
goto out;
|
|
}
|
|
|
|
if (btrfs_root_refs(&new_root->root_item) == 0) {
|
|
ret = -ENOENT;
|
|
goto out;
|
|
}
|
|
|
|
path = btrfs_alloc_path();
|
|
if (!path) {
|
|
ret = -ENOMEM;
|
|
goto out;
|
|
}
|
|
path->leave_spinning = 1;
|
|
|
|
trans = btrfs_start_transaction(root, 1);
|
|
if (IS_ERR(trans)) {
|
|
btrfs_free_path(path);
|
|
ret = PTR_ERR(trans);
|
|
goto out;
|
|
}
|
|
|
|
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 (IS_ERR_OR_NULL(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");
|
|
ret = -ENOENT;
|
|
goto out;
|
|
}
|
|
|
|
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);
|
|
|
|
btrfs_set_fs_incompat(root->fs_info, DEFAULT_SUBVOL);
|
|
btrfs_end_transaction(trans, root);
|
|
out:
|
|
mnt_drop_write_file(file);
|
|
return ret;
|
|
}
|
|
|
|
void btrfs_get_block_group_info(struct list_head *groups_list,
|
|
struct btrfs_ioctl_space_info *space)
|
|
{
|
|
struct btrfs_block_group_cache *block_group;
|
|
|
|
space->total_bytes = 0;
|
|
space->used_bytes = 0;
|
|
space->flags = 0;
|
|
list_for_each_entry(block_group, groups_list, list) {
|
|
space->flags = block_group->flags;
|
|
space->total_bytes += block_group->key.offset;
|
|
space->used_bytes +=
|
|
btrfs_block_group_used(&block_group->item);
|
|
}
|
|
}
|
|
|
|
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 *user_dest;
|
|
struct btrfs_space_info *info;
|
|
u64 types[] = {BTRFS_BLOCK_GROUP_DATA,
|
|
BTRFS_BLOCK_GROUP_SYSTEM,
|
|
BTRFS_BLOCK_GROUP_METADATA,
|
|
BTRFS_BLOCK_GROUP_DATA | BTRFS_BLOCK_GROUP_METADATA};
|
|
int num_types = 4;
|
|
int alloc_size;
|
|
int ret = 0;
|
|
u64 slot_count = 0;
|
|
int i, c;
|
|
|
|
if (copy_from_user(&space_args,
|
|
(struct btrfs_ioctl_space_args __user *)arg,
|
|
sizeof(space_args)))
|
|
return -EFAULT;
|
|
|
|
for (i = 0; i < num_types; i++) {
|
|
struct btrfs_space_info *tmp;
|
|
|
|
info = NULL;
|
|
rcu_read_lock();
|
|
list_for_each_entry_rcu(tmp, &root->fs_info->space_info,
|
|
list) {
|
|
if (tmp->flags == types[i]) {
|
|
info = tmp;
|
|
break;
|
|
}
|
|
}
|
|
rcu_read_unlock();
|
|
|
|
if (!info)
|
|
continue;
|
|
|
|
down_read(&info->groups_sem);
|
|
for (c = 0; c < BTRFS_NR_RAID_TYPES; c++) {
|
|
if (!list_empty(&info->block_groups[c]))
|
|
slot_count++;
|
|
}
|
|
up_read(&info->groups_sem);
|
|
}
|
|
|
|
/* space_slots == 0 means they are asking for a count */
|
|
if (space_args.space_slots == 0) {
|
|
space_args.total_spaces = slot_count;
|
|
goto out;
|
|
}
|
|
|
|
slot_count = min_t(u64, space_args.space_slots, slot_count);
|
|
|
|
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 */
|
|
for (i = 0; i < num_types; i++) {
|
|
struct btrfs_space_info *tmp;
|
|
|
|
if (!slot_count)
|
|
break;
|
|
|
|
info = NULL;
|
|
rcu_read_lock();
|
|
list_for_each_entry_rcu(tmp, &root->fs_info->space_info,
|
|
list) {
|
|
if (tmp->flags == types[i]) {
|
|
info = tmp;
|
|
break;
|
|
}
|
|
}
|
|
rcu_read_unlock();
|
|
|
|
if (!info)
|
|
continue;
|
|
down_read(&info->groups_sem);
|
|
for (c = 0; c < BTRFS_NR_RAID_TYPES; c++) {
|
|
if (!list_empty(&info->block_groups[c])) {
|
|
btrfs_get_block_group_info(
|
|
&info->block_groups[c], &space);
|
|
memcpy(dest, &space, sizeof(space));
|
|
dest++;
|
|
space_args.total_spaces++;
|
|
slot_count--;
|
|
}
|
|
if (!slot_count)
|
|
break;
|
|
}
|
|
up_read(&info->groups_sem);
|
|
}
|
|
|
|
user_dest = (struct btrfs_ioctl_space_info __user *)
|
|
(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;
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
|
|
trans = file->private_data;
|
|
if (!trans)
|
|
return -EINVAL;
|
|
file->private_data = NULL;
|
|
|
|
btrfs_end_transaction(trans, root);
|
|
|
|
atomic_dec(&root->fs_info->open_ioctl_trans);
|
|
|
|
mnt_drop_write_file(file);
|
|
return 0;
|
|
}
|
|
|
|
static noinline long btrfs_ioctl_start_sync(struct btrfs_root *root,
|
|
void __user *argp)
|
|
{
|
|
struct btrfs_trans_handle *trans;
|
|
u64 transid;
|
|
int ret;
|
|
|
|
trans = btrfs_attach_transaction(root);
|
|
if (IS_ERR(trans)) {
|
|
if (PTR_ERR(trans) != -ENOENT)
|
|
return PTR_ERR(trans);
|
|
|
|
/* No running transaction, don't bother */
|
|
transid = root->fs_info->last_trans_committed;
|
|
goto out;
|
|
}
|
|
transid = trans->transid;
|
|
ret = btrfs_commit_transaction_async(trans, root, 0);
|
|
if (ret) {
|
|
btrfs_end_transaction(trans, root);
|
|
return ret;
|
|
}
|
|
out:
|
|
if (argp)
|
|
if (copy_to_user(argp, &transid, sizeof(transid)))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
static noinline long btrfs_ioctl_wait_sync(struct btrfs_root *root,
|
|
void __user *argp)
|
|
{
|
|
u64 transid;
|
|
|
|
if (argp) {
|
|
if (copy_from_user(&transid, argp, sizeof(transid)))
|
|
return -EFAULT;
|
|
} else {
|
|
transid = 0; /* current trans */
|
|
}
|
|
return btrfs_wait_for_commit(root, transid);
|
|
}
|
|
|
|
static long btrfs_ioctl_scrub(struct file *file, void __user *arg)
|
|
{
|
|
struct btrfs_root *root = BTRFS_I(fdentry(file)->d_inode)->root;
|
|
struct btrfs_ioctl_scrub_args *sa;
|
|
int ret;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
sa = memdup_user(arg, sizeof(*sa));
|
|
if (IS_ERR(sa))
|
|
return PTR_ERR(sa);
|
|
|
|
if (!(sa->flags & BTRFS_SCRUB_READONLY)) {
|
|
ret = mnt_want_write_file(file);
|
|
if (ret)
|
|
goto out;
|
|
}
|
|
|
|
ret = btrfs_scrub_dev(root->fs_info, sa->devid, sa->start, sa->end,
|
|
&sa->progress, sa->flags & BTRFS_SCRUB_READONLY,
|
|
0);
|
|
|
|
if (copy_to_user(arg, sa, sizeof(*sa)))
|
|
ret = -EFAULT;
|
|
|
|
if (!(sa->flags & BTRFS_SCRUB_READONLY))
|
|
mnt_drop_write_file(file);
|
|
out:
|
|
kfree(sa);
|
|
return ret;
|
|
}
|
|
|
|
static long btrfs_ioctl_scrub_cancel(struct btrfs_root *root, void __user *arg)
|
|
{
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
return btrfs_scrub_cancel(root->fs_info);
|
|
}
|
|
|
|
static long btrfs_ioctl_scrub_progress(struct btrfs_root *root,
|
|
void __user *arg)
|
|
{
|
|
struct btrfs_ioctl_scrub_args *sa;
|
|
int ret;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
sa = memdup_user(arg, sizeof(*sa));
|
|
if (IS_ERR(sa))
|
|
return PTR_ERR(sa);
|
|
|
|
ret = btrfs_scrub_progress(root, sa->devid, &sa->progress);
|
|
|
|
if (copy_to_user(arg, sa, sizeof(*sa)))
|
|
ret = -EFAULT;
|
|
|
|
kfree(sa);
|
|
return ret;
|
|
}
|
|
|
|
static long btrfs_ioctl_get_dev_stats(struct btrfs_root *root,
|
|
void __user *arg)
|
|
{
|
|
struct btrfs_ioctl_get_dev_stats *sa;
|
|
int ret;
|
|
|
|
sa = memdup_user(arg, sizeof(*sa));
|
|
if (IS_ERR(sa))
|
|
return PTR_ERR(sa);
|
|
|
|
if ((sa->flags & BTRFS_DEV_STATS_RESET) && !capable(CAP_SYS_ADMIN)) {
|
|
kfree(sa);
|
|
return -EPERM;
|
|
}
|
|
|
|
ret = btrfs_get_dev_stats(root, sa);
|
|
|
|
if (copy_to_user(arg, sa, sizeof(*sa)))
|
|
ret = -EFAULT;
|
|
|
|
kfree(sa);
|
|
return ret;
|
|
}
|
|
|
|
static long btrfs_ioctl_dev_replace(struct btrfs_root *root, void __user *arg)
|
|
{
|
|
struct btrfs_ioctl_dev_replace_args *p;
|
|
int ret;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
p = memdup_user(arg, sizeof(*p));
|
|
if (IS_ERR(p))
|
|
return PTR_ERR(p);
|
|
|
|
switch (p->cmd) {
|
|
case BTRFS_IOCTL_DEV_REPLACE_CMD_START:
|
|
if (atomic_xchg(
|
|
&root->fs_info->mutually_exclusive_operation_running,
|
|
1)) {
|
|
pr_info("btrfs: dev add/delete/balance/replace/resize operation in progress\n");
|
|
ret = -EINPROGRESS;
|
|
} else {
|
|
ret = btrfs_dev_replace_start(root, p);
|
|
atomic_set(
|
|
&root->fs_info->mutually_exclusive_operation_running,
|
|
0);
|
|
}
|
|
break;
|
|
case BTRFS_IOCTL_DEV_REPLACE_CMD_STATUS:
|
|
btrfs_dev_replace_status(root->fs_info, p);
|
|
ret = 0;
|
|
break;
|
|
case BTRFS_IOCTL_DEV_REPLACE_CMD_CANCEL:
|
|
ret = btrfs_dev_replace_cancel(root->fs_info, p);
|
|
break;
|
|
default:
|
|
ret = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
if (copy_to_user(arg, p, sizeof(*p)))
|
|
ret = -EFAULT;
|
|
|
|
kfree(p);
|
|
return ret;
|
|
}
|
|
|
|
static long btrfs_ioctl_ino_to_path(struct btrfs_root *root, void __user *arg)
|
|
{
|
|
int ret = 0;
|
|
int i;
|
|
u64 rel_ptr;
|
|
int size;
|
|
struct btrfs_ioctl_ino_path_args *ipa = NULL;
|
|
struct inode_fs_paths *ipath = NULL;
|
|
struct btrfs_path *path;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
path = btrfs_alloc_path();
|
|
if (!path) {
|
|
ret = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
ipa = memdup_user(arg, sizeof(*ipa));
|
|
if (IS_ERR(ipa)) {
|
|
ret = PTR_ERR(ipa);
|
|
ipa = NULL;
|
|
goto out;
|
|
}
|
|
|
|
size = min_t(u32, ipa->size, 4096);
|
|
ipath = init_ipath(size, root, path);
|
|
if (IS_ERR(ipath)) {
|
|
ret = PTR_ERR(ipath);
|
|
ipath = NULL;
|
|
goto out;
|
|
}
|
|
|
|
ret = paths_from_inode(ipa->inum, ipath);
|
|
if (ret < 0)
|
|
goto out;
|
|
|
|
for (i = 0; i < ipath->fspath->elem_cnt; ++i) {
|
|
rel_ptr = ipath->fspath->val[i] -
|
|
(u64)(unsigned long)ipath->fspath->val;
|
|
ipath->fspath->val[i] = rel_ptr;
|
|
}
|
|
|
|
ret = copy_to_user((void *)(unsigned long)ipa->fspath,
|
|
(void *)(unsigned long)ipath->fspath, size);
|
|
if (ret) {
|
|
ret = -EFAULT;
|
|
goto out;
|
|
}
|
|
|
|
out:
|
|
btrfs_free_path(path);
|
|
free_ipath(ipath);
|
|
kfree(ipa);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int build_ino_list(u64 inum, u64 offset, u64 root, void *ctx)
|
|
{
|
|
struct btrfs_data_container *inodes = ctx;
|
|
const size_t c = 3 * sizeof(u64);
|
|
|
|
if (inodes->bytes_left >= c) {
|
|
inodes->bytes_left -= c;
|
|
inodes->val[inodes->elem_cnt] = inum;
|
|
inodes->val[inodes->elem_cnt + 1] = offset;
|
|
inodes->val[inodes->elem_cnt + 2] = root;
|
|
inodes->elem_cnt += 3;
|
|
} else {
|
|
inodes->bytes_missing += c - inodes->bytes_left;
|
|
inodes->bytes_left = 0;
|
|
inodes->elem_missed += 3;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static long btrfs_ioctl_logical_to_ino(struct btrfs_root *root,
|
|
void __user *arg)
|
|
{
|
|
int ret = 0;
|
|
int size;
|
|
struct btrfs_ioctl_logical_ino_args *loi;
|
|
struct btrfs_data_container *inodes = NULL;
|
|
struct btrfs_path *path = NULL;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
loi = memdup_user(arg, sizeof(*loi));
|
|
if (IS_ERR(loi)) {
|
|
ret = PTR_ERR(loi);
|
|
loi = NULL;
|
|
goto out;
|
|
}
|
|
|
|
path = btrfs_alloc_path();
|
|
if (!path) {
|
|
ret = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
size = min_t(u32, loi->size, 64 * 1024);
|
|
inodes = init_data_container(size);
|
|
if (IS_ERR(inodes)) {
|
|
ret = PTR_ERR(inodes);
|
|
inodes = NULL;
|
|
goto out;
|
|
}
|
|
|
|
ret = iterate_inodes_from_logical(loi->logical, root->fs_info, path,
|
|
build_ino_list, inodes);
|
|
if (ret == -EINVAL)
|
|
ret = -ENOENT;
|
|
if (ret < 0)
|
|
goto out;
|
|
|
|
ret = copy_to_user((void *)(unsigned long)loi->inodes,
|
|
(void *)(unsigned long)inodes, size);
|
|
if (ret)
|
|
ret = -EFAULT;
|
|
|
|
out:
|
|
btrfs_free_path(path);
|
|
vfree(inodes);
|
|
kfree(loi);
|
|
|
|
return ret;
|
|
}
|
|
|
|
void update_ioctl_balance_args(struct btrfs_fs_info *fs_info, int lock,
|
|
struct btrfs_ioctl_balance_args *bargs)
|
|
{
|
|
struct btrfs_balance_control *bctl = fs_info->balance_ctl;
|
|
|
|
bargs->flags = bctl->flags;
|
|
|
|
if (atomic_read(&fs_info->balance_running))
|
|
bargs->state |= BTRFS_BALANCE_STATE_RUNNING;
|
|
if (atomic_read(&fs_info->balance_pause_req))
|
|
bargs->state |= BTRFS_BALANCE_STATE_PAUSE_REQ;
|
|
if (atomic_read(&fs_info->balance_cancel_req))
|
|
bargs->state |= BTRFS_BALANCE_STATE_CANCEL_REQ;
|
|
|
|
memcpy(&bargs->data, &bctl->data, sizeof(bargs->data));
|
|
memcpy(&bargs->meta, &bctl->meta, sizeof(bargs->meta));
|
|
memcpy(&bargs->sys, &bctl->sys, sizeof(bargs->sys));
|
|
|
|
if (lock) {
|
|
spin_lock(&fs_info->balance_lock);
|
|
memcpy(&bargs->stat, &bctl->stat, sizeof(bargs->stat));
|
|
spin_unlock(&fs_info->balance_lock);
|
|
} else {
|
|
memcpy(&bargs->stat, &bctl->stat, sizeof(bargs->stat));
|
|
}
|
|
}
|
|
|
|
static long btrfs_ioctl_balance(struct file *file, void __user *arg)
|
|
{
|
|
struct btrfs_root *root = BTRFS_I(fdentry(file)->d_inode)->root;
|
|
struct btrfs_fs_info *fs_info = root->fs_info;
|
|
struct btrfs_ioctl_balance_args *bargs;
|
|
struct btrfs_balance_control *bctl;
|
|
int ret;
|
|
int need_to_clear_lock = 0;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
ret = mnt_want_write_file(file);
|
|
if (ret)
|
|
return ret;
|
|
|
|
mutex_lock(&fs_info->volume_mutex);
|
|
mutex_lock(&fs_info->balance_mutex);
|
|
|
|
if (arg) {
|
|
bargs = memdup_user(arg, sizeof(*bargs));
|
|
if (IS_ERR(bargs)) {
|
|
ret = PTR_ERR(bargs);
|
|
goto out;
|
|
}
|
|
|
|
if (bargs->flags & BTRFS_BALANCE_RESUME) {
|
|
if (!fs_info->balance_ctl) {
|
|
ret = -ENOTCONN;
|
|
goto out_bargs;
|
|
}
|
|
|
|
bctl = fs_info->balance_ctl;
|
|
spin_lock(&fs_info->balance_lock);
|
|
bctl->flags |= BTRFS_BALANCE_RESUME;
|
|
spin_unlock(&fs_info->balance_lock);
|
|
|
|
goto do_balance;
|
|
}
|
|
} else {
|
|
bargs = NULL;
|
|
}
|
|
|
|
if (atomic_xchg(&root->fs_info->mutually_exclusive_operation_running,
|
|
1)) {
|
|
pr_info("btrfs: dev add/delete/balance/replace/resize operation in progress\n");
|
|
ret = -EINPROGRESS;
|
|
goto out_bargs;
|
|
}
|
|
need_to_clear_lock = 1;
|
|
|
|
bctl = kzalloc(sizeof(*bctl), GFP_NOFS);
|
|
if (!bctl) {
|
|
ret = -ENOMEM;
|
|
goto out_bargs;
|
|
}
|
|
|
|
bctl->fs_info = fs_info;
|
|
if (arg) {
|
|
memcpy(&bctl->data, &bargs->data, sizeof(bctl->data));
|
|
memcpy(&bctl->meta, &bargs->meta, sizeof(bctl->meta));
|
|
memcpy(&bctl->sys, &bargs->sys, sizeof(bctl->sys));
|
|
|
|
bctl->flags = bargs->flags;
|
|
} else {
|
|
/* balance everything - no filters */
|
|
bctl->flags |= BTRFS_BALANCE_TYPE_MASK;
|
|
}
|
|
|
|
do_balance:
|
|
ret = btrfs_balance(bctl, bargs);
|
|
/*
|
|
* bctl is freed in __cancel_balance or in free_fs_info if
|
|
* restriper was paused all the way until unmount
|
|
*/
|
|
if (arg) {
|
|
if (copy_to_user(arg, bargs, sizeof(*bargs)))
|
|
ret = -EFAULT;
|
|
}
|
|
|
|
out_bargs:
|
|
kfree(bargs);
|
|
out:
|
|
if (need_to_clear_lock)
|
|
atomic_set(&root->fs_info->mutually_exclusive_operation_running,
|
|
0);
|
|
mutex_unlock(&fs_info->balance_mutex);
|
|
mutex_unlock(&fs_info->volume_mutex);
|
|
mnt_drop_write_file(file);
|
|
return ret;
|
|
}
|
|
|
|
static long btrfs_ioctl_balance_ctl(struct btrfs_root *root, int cmd)
|
|
{
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
switch (cmd) {
|
|
case BTRFS_BALANCE_CTL_PAUSE:
|
|
return btrfs_pause_balance(root->fs_info);
|
|
case BTRFS_BALANCE_CTL_CANCEL:
|
|
return btrfs_cancel_balance(root->fs_info);
|
|
}
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
static long btrfs_ioctl_balance_progress(struct btrfs_root *root,
|
|
void __user *arg)
|
|
{
|
|
struct btrfs_fs_info *fs_info = root->fs_info;
|
|
struct btrfs_ioctl_balance_args *bargs;
|
|
int ret = 0;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
mutex_lock(&fs_info->balance_mutex);
|
|
if (!fs_info->balance_ctl) {
|
|
ret = -ENOTCONN;
|
|
goto out;
|
|
}
|
|
|
|
bargs = kzalloc(sizeof(*bargs), GFP_NOFS);
|
|
if (!bargs) {
|
|
ret = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
update_ioctl_balance_args(fs_info, 1, bargs);
|
|
|
|
if (copy_to_user(arg, bargs, sizeof(*bargs)))
|
|
ret = -EFAULT;
|
|
|
|
kfree(bargs);
|
|
out:
|
|
mutex_unlock(&fs_info->balance_mutex);
|
|
return ret;
|
|
}
|
|
|
|
static long btrfs_ioctl_quota_ctl(struct file *file, void __user *arg)
|
|
{
|
|
struct btrfs_root *root = BTRFS_I(fdentry(file)->d_inode)->root;
|
|
struct btrfs_ioctl_quota_ctl_args *sa;
|
|
struct btrfs_trans_handle *trans = NULL;
|
|
int ret;
|
|
int err;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
ret = mnt_want_write_file(file);
|
|
if (ret)
|
|
return ret;
|
|
|
|
sa = memdup_user(arg, sizeof(*sa));
|
|
if (IS_ERR(sa)) {
|
|
ret = PTR_ERR(sa);
|
|
goto drop_write;
|
|
}
|
|
|
|
if (sa->cmd != BTRFS_QUOTA_CTL_RESCAN) {
|
|
trans = btrfs_start_transaction(root, 2);
|
|
if (IS_ERR(trans)) {
|
|
ret = PTR_ERR(trans);
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
switch (sa->cmd) {
|
|
case BTRFS_QUOTA_CTL_ENABLE:
|
|
ret = btrfs_quota_enable(trans, root->fs_info);
|
|
break;
|
|
case BTRFS_QUOTA_CTL_DISABLE:
|
|
ret = btrfs_quota_disable(trans, root->fs_info);
|
|
break;
|
|
case BTRFS_QUOTA_CTL_RESCAN:
|
|
ret = btrfs_quota_rescan(root->fs_info);
|
|
break;
|
|
default:
|
|
ret = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
if (copy_to_user(arg, sa, sizeof(*sa)))
|
|
ret = -EFAULT;
|
|
|
|
if (trans) {
|
|
err = btrfs_commit_transaction(trans, root);
|
|
if (err && !ret)
|
|
ret = err;
|
|
}
|
|
out:
|
|
kfree(sa);
|
|
drop_write:
|
|
mnt_drop_write_file(file);
|
|
return ret;
|
|
}
|
|
|
|
static long btrfs_ioctl_qgroup_assign(struct file *file, void __user *arg)
|
|
{
|
|
struct btrfs_root *root = BTRFS_I(fdentry(file)->d_inode)->root;
|
|
struct btrfs_ioctl_qgroup_assign_args *sa;
|
|
struct btrfs_trans_handle *trans;
|
|
int ret;
|
|
int err;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
ret = mnt_want_write_file(file);
|
|
if (ret)
|
|
return ret;
|
|
|
|
sa = memdup_user(arg, sizeof(*sa));
|
|
if (IS_ERR(sa)) {
|
|
ret = PTR_ERR(sa);
|
|
goto drop_write;
|
|
}
|
|
|
|
trans = btrfs_join_transaction(root);
|
|
if (IS_ERR(trans)) {
|
|
ret = PTR_ERR(trans);
|
|
goto out;
|
|
}
|
|
|
|
/* FIXME: check if the IDs really exist */
|
|
if (sa->assign) {
|
|
ret = btrfs_add_qgroup_relation(trans, root->fs_info,
|
|
sa->src, sa->dst);
|
|
} else {
|
|
ret = btrfs_del_qgroup_relation(trans, root->fs_info,
|
|
sa->src, sa->dst);
|
|
}
|
|
|
|
err = btrfs_end_transaction(trans, root);
|
|
if (err && !ret)
|
|
ret = err;
|
|
|
|
out:
|
|
kfree(sa);
|
|
drop_write:
|
|
mnt_drop_write_file(file);
|
|
return ret;
|
|
}
|
|
|
|
static long btrfs_ioctl_qgroup_create(struct file *file, void __user *arg)
|
|
{
|
|
struct btrfs_root *root = BTRFS_I(fdentry(file)->d_inode)->root;
|
|
struct btrfs_ioctl_qgroup_create_args *sa;
|
|
struct btrfs_trans_handle *trans;
|
|
int ret;
|
|
int err;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
ret = mnt_want_write_file(file);
|
|
if (ret)
|
|
return ret;
|
|
|
|
sa = memdup_user(arg, sizeof(*sa));
|
|
if (IS_ERR(sa)) {
|
|
ret = PTR_ERR(sa);
|
|
goto drop_write;
|
|
}
|
|
|
|
trans = btrfs_join_transaction(root);
|
|
if (IS_ERR(trans)) {
|
|
ret = PTR_ERR(trans);
|
|
goto out;
|
|
}
|
|
|
|
/* FIXME: check if the IDs really exist */
|
|
if (sa->create) {
|
|
ret = btrfs_create_qgroup(trans, root->fs_info, sa->qgroupid,
|
|
NULL);
|
|
} else {
|
|
ret = btrfs_remove_qgroup(trans, root->fs_info, sa->qgroupid);
|
|
}
|
|
|
|
err = btrfs_end_transaction(trans, root);
|
|
if (err && !ret)
|
|
ret = err;
|
|
|
|
out:
|
|
kfree(sa);
|
|
drop_write:
|
|
mnt_drop_write_file(file);
|
|
return ret;
|
|
}
|
|
|
|
static long btrfs_ioctl_qgroup_limit(struct file *file, void __user *arg)
|
|
{
|
|
struct btrfs_root *root = BTRFS_I(fdentry(file)->d_inode)->root;
|
|
struct btrfs_ioctl_qgroup_limit_args *sa;
|
|
struct btrfs_trans_handle *trans;
|
|
int ret;
|
|
int err;
|
|
u64 qgroupid;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
ret = mnt_want_write_file(file);
|
|
if (ret)
|
|
return ret;
|
|
|
|
sa = memdup_user(arg, sizeof(*sa));
|
|
if (IS_ERR(sa)) {
|
|
ret = PTR_ERR(sa);
|
|
goto drop_write;
|
|
}
|
|
|
|
trans = btrfs_join_transaction(root);
|
|
if (IS_ERR(trans)) {
|
|
ret = PTR_ERR(trans);
|
|
goto out;
|
|
}
|
|
|
|
qgroupid = sa->qgroupid;
|
|
if (!qgroupid) {
|
|
/* take the current subvol as qgroup */
|
|
qgroupid = root->root_key.objectid;
|
|
}
|
|
|
|
/* FIXME: check if the IDs really exist */
|
|
ret = btrfs_limit_qgroup(trans, root->fs_info, qgroupid, &sa->lim);
|
|
|
|
err = btrfs_end_transaction(trans, root);
|
|
if (err && !ret)
|
|
ret = err;
|
|
|
|
out:
|
|
kfree(sa);
|
|
drop_write:
|
|
mnt_drop_write_file(file);
|
|
return ret;
|
|
}
|
|
|
|
static long btrfs_ioctl_set_received_subvol(struct file *file,
|
|
void __user *arg)
|
|
{
|
|
struct btrfs_ioctl_received_subvol_args *sa = NULL;
|
|
struct inode *inode = fdentry(file)->d_inode;
|
|
struct btrfs_root *root = BTRFS_I(inode)->root;
|
|
struct btrfs_root_item *root_item = &root->root_item;
|
|
struct btrfs_trans_handle *trans;
|
|
struct timespec ct = CURRENT_TIME;
|
|
int ret = 0;
|
|
|
|
ret = mnt_want_write_file(file);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
down_write(&root->fs_info->subvol_sem);
|
|
|
|
if (btrfs_ino(inode) != BTRFS_FIRST_FREE_OBJECTID) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
if (btrfs_root_readonly(root)) {
|
|
ret = -EROFS;
|
|
goto out;
|
|
}
|
|
|
|
if (!inode_owner_or_capable(inode)) {
|
|
ret = -EACCES;
|
|
goto out;
|
|
}
|
|
|
|
sa = memdup_user(arg, sizeof(*sa));
|
|
if (IS_ERR(sa)) {
|
|
ret = PTR_ERR(sa);
|
|
sa = NULL;
|
|
goto out;
|
|
}
|
|
|
|
trans = btrfs_start_transaction(root, 1);
|
|
if (IS_ERR(trans)) {
|
|
ret = PTR_ERR(trans);
|
|
trans = NULL;
|
|
goto out;
|
|
}
|
|
|
|
sa->rtransid = trans->transid;
|
|
sa->rtime.sec = ct.tv_sec;
|
|
sa->rtime.nsec = ct.tv_nsec;
|
|
|
|
memcpy(root_item->received_uuid, sa->uuid, BTRFS_UUID_SIZE);
|
|
btrfs_set_root_stransid(root_item, sa->stransid);
|
|
btrfs_set_root_rtransid(root_item, sa->rtransid);
|
|
root_item->stime.sec = cpu_to_le64(sa->stime.sec);
|
|
root_item->stime.nsec = cpu_to_le32(sa->stime.nsec);
|
|
root_item->rtime.sec = cpu_to_le64(sa->rtime.sec);
|
|
root_item->rtime.nsec = cpu_to_le32(sa->rtime.nsec);
|
|
|
|
ret = btrfs_update_root(trans, root->fs_info->tree_root,
|
|
&root->root_key, &root->root_item);
|
|
if (ret < 0) {
|
|
btrfs_end_transaction(trans, root);
|
|
trans = NULL;
|
|
goto out;
|
|
} else {
|
|
ret = btrfs_commit_transaction(trans, root);
|
|
if (ret < 0)
|
|
goto out;
|
|
}
|
|
|
|
ret = copy_to_user(arg, sa, sizeof(*sa));
|
|
if (ret)
|
|
ret = -EFAULT;
|
|
|
|
out:
|
|
kfree(sa);
|
|
up_write(&root->fs_info->subvol_sem);
|
|
mnt_drop_write_file(file);
|
|
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;
|
|
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 FITRIM:
|
|
return btrfs_ioctl_fitrim(file, argp);
|
|
case BTRFS_IOC_SNAP_CREATE:
|
|
return btrfs_ioctl_snap_create(file, argp, 0);
|
|
case BTRFS_IOC_SNAP_CREATE_V2:
|
|
return btrfs_ioctl_snap_create_v2(file, argp, 0);
|
|
case BTRFS_IOC_SUBVOL_CREATE:
|
|
return btrfs_ioctl_snap_create(file, argp, 1);
|
|
case BTRFS_IOC_SUBVOL_CREATE_V2:
|
|
return btrfs_ioctl_snap_create_v2(file, argp, 1);
|
|
case BTRFS_IOC_SNAP_DESTROY:
|
|
return btrfs_ioctl_snap_destroy(file, argp);
|
|
case BTRFS_IOC_SUBVOL_GETFLAGS:
|
|
return btrfs_ioctl_subvol_getflags(file, argp);
|
|
case BTRFS_IOC_SUBVOL_SETFLAGS:
|
|
return btrfs_ioctl_subvol_setflags(file, argp);
|
|
case BTRFS_IOC_DEFAULT_SUBVOL:
|
|
return btrfs_ioctl_default_subvol(file, argp);
|
|
case BTRFS_IOC_DEFRAG:
|
|
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(file, argp);
|
|
case BTRFS_IOC_ADD_DEV:
|
|
return btrfs_ioctl_add_dev(root, argp);
|
|
case BTRFS_IOC_RM_DEV:
|
|
return btrfs_ioctl_rm_dev(file, argp);
|
|
case BTRFS_IOC_FS_INFO:
|
|
return btrfs_ioctl_fs_info(root, argp);
|
|
case BTRFS_IOC_DEV_INFO:
|
|
return btrfs_ioctl_dev_info(root, argp);
|
|
case BTRFS_IOC_BALANCE:
|
|
return btrfs_ioctl_balance(file, NULL);
|
|
case BTRFS_IOC_CLONE:
|
|
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_INO_PATHS:
|
|
return btrfs_ioctl_ino_to_path(root, argp);
|
|
case BTRFS_IOC_LOGICAL_INO:
|
|
return btrfs_ioctl_logical_to_ino(root, 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;
|
|
case BTRFS_IOC_START_SYNC:
|
|
return btrfs_ioctl_start_sync(root, argp);
|
|
case BTRFS_IOC_WAIT_SYNC:
|
|
return btrfs_ioctl_wait_sync(root, argp);
|
|
case BTRFS_IOC_SCRUB:
|
|
return btrfs_ioctl_scrub(file, argp);
|
|
case BTRFS_IOC_SCRUB_CANCEL:
|
|
return btrfs_ioctl_scrub_cancel(root, argp);
|
|
case BTRFS_IOC_SCRUB_PROGRESS:
|
|
return btrfs_ioctl_scrub_progress(root, argp);
|
|
case BTRFS_IOC_BALANCE_V2:
|
|
return btrfs_ioctl_balance(file, argp);
|
|
case BTRFS_IOC_BALANCE_CTL:
|
|
return btrfs_ioctl_balance_ctl(root, arg);
|
|
case BTRFS_IOC_BALANCE_PROGRESS:
|
|
return btrfs_ioctl_balance_progress(root, argp);
|
|
case BTRFS_IOC_SET_RECEIVED_SUBVOL:
|
|
return btrfs_ioctl_set_received_subvol(file, argp);
|
|
case BTRFS_IOC_SEND:
|
|
return btrfs_ioctl_send(file, argp);
|
|
case BTRFS_IOC_GET_DEV_STATS:
|
|
return btrfs_ioctl_get_dev_stats(root, argp);
|
|
case BTRFS_IOC_QUOTA_CTL:
|
|
return btrfs_ioctl_quota_ctl(file, argp);
|
|
case BTRFS_IOC_QGROUP_ASSIGN:
|
|
return btrfs_ioctl_qgroup_assign(file, argp);
|
|
case BTRFS_IOC_QGROUP_CREATE:
|
|
return btrfs_ioctl_qgroup_create(file, argp);
|
|
case BTRFS_IOC_QGROUP_LIMIT:
|
|
return btrfs_ioctl_qgroup_limit(file, argp);
|
|
case BTRFS_IOC_DEV_REPLACE:
|
|
return btrfs_ioctl_dev_replace(root, argp);
|
|
}
|
|
|
|
return -ENOTTY;
|
|
}
|