#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 "inode-map.h"
#include "backref.h"
#include "rcu-string.h"
+#include "send.h"
/* Mask out flags that are inappropriate for the given type of inode. */
static inline __u32 btrfs_mask_flags(umode_t mode, __u32 flags)
static noinline int create_subvol(struct btrfs_root *root,
struct dentry *dentry,
char *name, int namelen,
- u64 *async_transid)
+ u64 *async_transid,
+ struct btrfs_qgroup_inherit **inherit)
{
struct btrfs_trans_handle *trans;
struct btrfs_key key;
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)
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)) {
BTRFS_UUID_SIZE);
btrfs_mark_buffer_dirty(leaf);
+ memset(&root_item, 0, sizeof(root_item));
+
inode_item = &root_item.inode;
- memset(inode_item, 0, sizeof(*inode_item));
inode_item->generation = cpu_to_le64(1);
inode_item->size = cpu_to_le64(3);
inode_item->nlink = cpu_to_le32(1);
btrfs_set_root_used(&root_item, leaf->len);
btrfs_set_root_last_snapshot(&root_item, 0);
- memset(&root_item.drop_progress, 0, sizeof(root_item.drop_progress));
- root_item.drop_level = 0;
+ btrfs_set_root_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_le64(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);
static int create_snapshot(struct btrfs_root *root, struct dentry *dentry,
char *name, int namelen, u64 *async_transid,
- bool readonly)
+ bool readonly, struct btrfs_qgroup_inherit **inherit)
{
struct inode *inode;
struct btrfs_pending_snapshot *pending_snapshot;
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, 5);
if (IS_ERR(trans)) {
static noinline int btrfs_mksubvol(struct path *parent,
char *name, int namelen,
struct btrfs_root *snap_src,
- u64 *async_transid, bool readonly)
+ u64 *async_transid, bool readonly,
+ struct btrfs_qgroup_inherit **inherit)
{
struct inode *dir = parent->dentry->d_inode;
struct dentry *dentry;
goto out_up_read;
if (snap_src) {
- error = create_snapshot(snap_src, dentry,
- name, namelen, async_transid, readonly);
+ 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);
+ name, namelen, async_transid, inherit);
}
if (!error)
fsnotify_mkdir(dir, dentry);
}
static int should_defrag_range(struct inode *inode, u64 start, int thresh,
- u64 *last_len, u64 *skip, u64 *defrag_end)
+ u64 *last_len, u64 *skip, u64 *defrag_end,
+ int compress)
{
struct extent_map *em;
int ret = 1;
* we hit a real extent, if it is big or the next extent is not a
* real extent, don't bother defragging it
*/
- if ((*last_len == 0 || *last_len >= thresh) &&
+ if (!compress && (*last_len == 0 || *last_len >= thresh) &&
(em->len >= thresh || !next_mergeable))
ret = 0;
out:
u64 newer_than, unsigned long max_to_defrag)
{
struct btrfs_root *root = BTRFS_I(inode)->root;
- struct btrfs_super_block *disk_super;
struct file_ra_state *ra = NULL;
unsigned long last_index;
u64 isize = i_size_read(inode);
- u64 features;
u64 last_len = 0;
u64 skip = 0;
u64 defrag_end = 0;
if (!should_defrag_range(inode, (u64)i << PAGE_CACHE_SHIFT,
extent_thresh, &last_len, &skip,
- &defrag_end)) {
+ &defrag_end, range->flags &
+ BTRFS_DEFRAG_RANGE_COMPRESS)) {
unsigned long next;
/*
* the should_defrag function tells us how much to skip
mutex_unlock(&inode->i_mutex);
}
- disk_super = root->fs_info->super_copy;
- features = btrfs_super_incompat_flags(disk_super);
if (range->compress_type == BTRFS_COMPRESS_LZO) {
- features |= BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO;
- btrfs_set_super_incompat_flags(disk_super, features);
+ btrfs_set_fs_incompat(root->fs_info, COMPRESS_LZO);
}
ret = defrag_count;
}
static noinline int btrfs_ioctl_snap_create_transid(struct file *file,
- char *name,
- unsigned long fd,
- int subvol,
- u64 *transid,
- bool readonly)
+ char *name, unsigned long fd, int subvol,
+ u64 *transid, bool readonly,
+ struct btrfs_qgroup_inherit **inherit)
{
- struct btrfs_root *root = BTRFS_I(fdentry(file)->d_inode)->root;
struct file *src_file;
int namelen;
int ret = 0;
- if (root->fs_info->sb->s_flags & MS_RDONLY)
- return -EROFS;
+ ret = mnt_want_write_file(file);
+ if (ret)
+ goto out;
namelen = strlen(name);
if (strchr(name, '/')) {
ret = -EINVAL;
- goto out;
+ goto out_drop_write;
}
if (name[0] == '.' &&
(namelen == 1 || (name[1] == '.' && namelen == 2))) {
ret = -EEXIST;
- goto out;
+ goto out_drop_write;
}
if (subvol) {
ret = btrfs_mksubvol(&file->f_path, name, namelen,
- NULL, transid, readonly);
+ NULL, transid, readonly, inherit);
} else {
struct inode *src_inode;
src_file = fget(fd);
if (!src_file) {
ret = -EINVAL;
- goto out;
+ goto out_drop_write;
}
src_inode = src_file->f_path.dentry->d_inode;
"another FS\n");
ret = -EINVAL;
fput(src_file);
- goto out;
+ goto out_drop_write;
}
ret = btrfs_mksubvol(&file->f_path, name, namelen,
BTRFS_I(src_inode)->root,
- transid, readonly);
+ transid, readonly, inherit);
fput(src_file);
}
+out_drop_write:
+ mnt_drop_write_file(file);
out:
return ret;
}
ret = btrfs_ioctl_snap_create_transid(file, vol_args->name,
vol_args->fd, subvol,
- NULL, false);
+ NULL, false, NULL);
kfree(vol_args);
return 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))
vol_args->name[BTRFS_SUBVOL_NAME_MAX] = '\0';
if (vol_args->flags &
- ~(BTRFS_SUBVOL_CREATE_ASYNC | BTRFS_SUBVOL_RDONLY)) {
+ ~(BTRFS_SUBVOL_CREATE_ASYNC | BTRFS_SUBVOL_RDONLY |
+ BTRFS_SUBVOL_QGROUP_INHERIT)) {
ret = -EOPNOTSUPP;
goto out;
}
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);
+ vol_args->fd, subvol, ptr,
+ readonly, &inherit);
if (ret == 0 && ptr &&
copy_to_user(arg +
ret = -EFAULT;
out:
kfree(vol_args);
+ kfree(inherit);
return ret;
}
u64 flags;
int ret = 0;
- if (root->fs_info->sb->s_flags & MS_RDONLY)
- return -EROFS;
+ ret = mnt_want_write_file(file);
+ if (ret)
+ goto out;
- if (btrfs_ino(inode) != BTRFS_FIRST_FREE_OBJECTID)
- return -EINVAL;
+ if (btrfs_ino(inode) != BTRFS_FIRST_FREE_OBJECTID) {
+ ret = -EINVAL;
+ goto out_drop_write;
+ }
- if (copy_from_user(&flags, arg, sizeof(flags)))
- return -EFAULT;
+ if (copy_from_user(&flags, arg, sizeof(flags))) {
+ ret = -EFAULT;
+ goto out_drop_write;
+ }
- if (flags & BTRFS_SUBVOL_CREATE_ASYNC)
- return -EINVAL;
+ if (flags & BTRFS_SUBVOL_CREATE_ASYNC) {
+ ret = -EINVAL;
+ goto out_drop_write;
+ }
- if (flags & ~BTRFS_SUBVOL_RDONLY)
- return -EOPNOTSUPP;
+ if (flags & ~BTRFS_SUBVOL_RDONLY) {
+ ret = -EOPNOTSUPP;
+ goto out_drop_write;
+ }
- if (!inode_owner_or_capable(inode))
- return -EACCES;
+ 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;
+ goto out_drop_sem;
root_flags = btrfs_root_flags(&root->root_item);
if (flags & BTRFS_SUBVOL_RDONLY)
out_reset:
if (ret)
btrfs_set_root_flags(&root->root_item, root_flags);
-out:
+out_drop_sem:
up_write(&root->fs_info->subvol_sem);
+out_drop_write:
+ mnt_drop_write_file(file);
+out:
return ret;
}
goto out_drop_write;
}
+ ret = -EXDEV;
+ if (src_file->f_path.mnt != file->f_path.mnt)
+ goto out_fput;
+
src = src_file->f_dentry->d_inode;
ret = -EINVAL;
goto out_fput;
ret = -EXDEV;
- if (src->i_sb != inode->i_sb || BTRFS_I(src)->root != root)
+ if (src->i_sb != inode->i_sb)
goto out_fput;
ret = -ENOMEM;
* note the key will change type as we walk through the
* tree.
*/
- ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
+ 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(root, path);
+ ret = btrfs_next_leaf(BTRFS_I(src)->root, path);
if (ret < 0)
goto out;
if (ret > 0)
struct btrfs_path *path;
struct btrfs_key location;
struct btrfs_disk_key disk_key;
- struct btrfs_super_block *disk_super;
- u64 features;
u64 objectid = 0;
u64 dir_id;
btrfs_mark_buffer_dirty(path->nodes[0]);
btrfs_free_path(path);
- disk_super = root->fs_info->super_copy;
- features = btrfs_super_incompat_flags(disk_super);
- if (!(features & BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL)) {
- features |= BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL;
- btrfs_set_super_incompat_flags(disk_super, features);
- }
+ btrfs_set_fs_incompat(root->fs_info, DEFAULT_SUBVOL);
btrfs_end_transaction(trans, root);
return 0;
}
static long btrfs_ioctl_get_dev_stats(struct btrfs_root *root,
- void __user *arg, int reset_after_read)
+ void __user *arg)
{
struct btrfs_ioctl_get_dev_stats *sa;
int ret;
- if (reset_after_read && !capable(CAP_SYS_ADMIN))
- return -EPERM;
-
sa = memdup_user(arg, sizeof(*sa));
if (IS_ERR(sa))
return PTR_ERR(sa);
- ret = btrfs_get_dev_stats(root, sa, reset_after_read);
+ 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;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
- if (fs_info->sb->s_flags & MS_RDONLY)
- return -EROFS;
-
ret = mnt_want_write_file(file);
if (ret)
return ret;
return ret;
}
+static long btrfs_ioctl_quota_ctl(struct btrfs_root *root, void __user *arg)
+{
+ struct btrfs_ioctl_quota_ctl_args *sa;
+ struct btrfs_trans_handle *trans = NULL;
+ int ret;
+ int err;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ if (root->fs_info->sb->s_flags & MS_RDONLY)
+ return -EROFS;
+
+ sa = memdup_user(arg, sizeof(*sa));
+ if (IS_ERR(sa))
+ return PTR_ERR(sa);
+
+ 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);
+ return ret;
+}
+
+static long btrfs_ioctl_qgroup_assign(struct btrfs_root *root, void __user *arg)
+{
+ struct btrfs_ioctl_qgroup_assign_args *sa;
+ struct btrfs_trans_handle *trans;
+ int ret;
+ int err;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ if (root->fs_info->sb->s_flags & MS_RDONLY)
+ return -EROFS;
+
+ sa = memdup_user(arg, sizeof(*sa));
+ if (IS_ERR(sa))
+ return PTR_ERR(sa);
+
+ 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);
+ return ret;
+}
+
+static long btrfs_ioctl_qgroup_create(struct btrfs_root *root, void __user *arg)
+{
+ struct btrfs_ioctl_qgroup_create_args *sa;
+ struct btrfs_trans_handle *trans;
+ int ret;
+ int err;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ if (root->fs_info->sb->s_flags & MS_RDONLY)
+ return -EROFS;
+
+ sa = memdup_user(arg, sizeof(*sa));
+ if (IS_ERR(sa))
+ return PTR_ERR(sa);
+
+ 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);
+ return ret;
+}
+
+static long btrfs_ioctl_qgroup_limit(struct btrfs_root *root, void __user *arg)
+{
+ 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;
+
+ if (root->fs_info->sb->s_flags & MS_RDONLY)
+ return -EROFS;
+
+ sa = memdup_user(arg, sizeof(*sa));
+ if (IS_ERR(sa))
+ return PTR_ERR(sa);
+
+ 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);
+ 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)
{
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_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, 0);
- case BTRFS_IOC_GET_AND_RESET_DEV_STATS:
- return btrfs_ioctl_get_dev_stats(root, argp, 1);
+ return btrfs_ioctl_get_dev_stats(root, argp);
+ case BTRFS_IOC_QUOTA_CTL:
+ return btrfs_ioctl_quota_ctl(root, argp);
+ case BTRFS_IOC_QGROUP_ASSIGN:
+ return btrfs_ioctl_qgroup_assign(root, argp);
+ case BTRFS_IOC_QGROUP_CREATE:
+ return btrfs_ioctl_qgroup_create(root, argp);
+ case BTRFS_IOC_QGROUP_LIMIT:
+ return btrfs_ioctl_qgroup_limit(root, argp);
}
return -ENOTTY;
projects / karo-tx-linux.git / blobdiff