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Btrfs: qgroup implementation and prototypes 

Signed-off-by: Arne Jansen <sensille@gmx.net>
Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
hifive-unleashed-5.1
Arne Jansen 2012-06-28 18:03:02 +02:00 committed by Jan Schmidt
parent 709c0486b9
commit bed92eae26
7 changed files with 1681 additions and 1 deletions
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2
fs/btrfs/Makefile
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@ -8,7 +8,7 @@ btrfs-y += super.o ctree.o extent-tree.o print-tree.o root-tree.o dir-item.o \
extent_io.o volumes.o async-thread.o ioctl.o locking.o orphan.o \
export.o tree-log.o free-space-cache.o zlib.o lzo.o \
compression.o delayed-ref.o relocation.o delayed-inode.o scrub.o \
reada.o backref.o ulist.o
reada.o backref.o ulist.o qgroup.o
btrfs-$(CONFIG_BTRFS_FS_POSIX_ACL) += acl.o
btrfs-$(CONFIG_BTRFS_FS_CHECK_INTEGRITY) += check-integrity.o

46
fs/btrfs/ctree.h
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@ -2830,6 +2830,8 @@ int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans,
int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range);
int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info);
/* ctree.c */
int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key,
int level, int *slot);
@ -3339,6 +3341,50 @@ void btrfs_reada_detach(void *handle);
int btree_readahead_hook(struct btrfs_root *root, struct extent_buffer *eb,
u64 start, int err);
/* qgroup.c */
struct qgroup_update {
struct list_head list;
struct btrfs_delayed_ref_node *node;
struct btrfs_delayed_extent_op *extent_op;
};
int btrfs_quota_enable(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info);
int btrfs_quota_disable(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info);
int btrfs_quota_rescan(struct btrfs_fs_info *fs_info);
int btrfs_add_qgroup_relation(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info, u64 src, u64 dst);
int btrfs_del_qgroup_relation(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info, u64 src, u64 dst);
int btrfs_create_qgroup(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info, u64 qgroupid,
char *name);
int btrfs_remove_qgroup(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info, u64 qgroupid);
int btrfs_limit_qgroup(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info, u64 qgroupid,
struct btrfs_qgroup_limit *limit);
int btrfs_read_qgroup_config(struct btrfs_fs_info *fs_info);
void btrfs_free_qgroup_config(struct btrfs_fs_info *fs_info);
struct btrfs_delayed_extent_op;
int btrfs_qgroup_record_ref(struct btrfs_trans_handle *trans,
struct btrfs_delayed_ref_node *node,
struct btrfs_delayed_extent_op *extent_op);
int btrfs_qgroup_account_ref(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info,
struct btrfs_delayed_ref_node *node,
struct btrfs_delayed_extent_op *extent_op);
int btrfs_run_qgroups(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info);
int btrfs_qgroup_inherit(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info, u64 srcid, u64 objectid,
struct btrfs_qgroup_inherit *inherit);
int btrfs_qgroup_reserve(struct btrfs_root *root, u64 num_bytes);
void btrfs_qgroup_free(struct btrfs_root *root, u64 num_bytes);
void assert_qgroups_uptodate(struct btrfs_trans_handle *trans);
static inline int is_fstree(u64 rootid)
{
if (rootid == BTRFS_FS_TREE_OBJECTID ||

34
fs/btrfs/extent-tree.c
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@ -2409,6 +2409,40 @@ static u64 find_middle(struct rb_root *root)
}
#endif
int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info)
{
struct qgroup_update *qgroup_update;
int ret = 0;
if (list_empty(&trans->qgroup_ref_list) !=
!trans->delayed_ref_elem.seq) {
/* list without seq or seq without list */
printk(KERN_ERR "btrfs: qgroup accounting update error, list is%s empty, seq is %llu\n",
list_empty(&trans->qgroup_ref_list) ? "" : " not",
trans->delayed_ref_elem.seq);
BUG();
}
if (!trans->delayed_ref_elem.seq)
return 0;
while (!list_empty(&trans->qgroup_ref_list)) {
qgroup_update = list_first_entry(&trans->qgroup_ref_list,
struct qgroup_update, list);
list_del(&qgroup_update->list);
if (!ret)
ret = btrfs_qgroup_account_ref(
trans, fs_info, qgroup_update->node,
qgroup_update->extent_op);
kfree(qgroup_update);
}
btrfs_put_tree_mod_seq(fs_info, &trans->delayed_ref_elem);
return ret;
}
/*
* this starts processing the delayed reference count updates and
* extent insertions we have queued up so far. count can be

24
fs/btrfs/ioctl.h
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@ -35,6 +35,30 @@ struct btrfs_ioctl_vol_args {
#define BTRFS_FSID_SIZE 16
#define BTRFS_UUID_SIZE 16
#define BTRFS_QGROUP_INHERIT_SET_LIMITS (1ULL << 0)
struct btrfs_qgroup_limit {
__u64 flags;
__u64 max_rfer;
__u64 max_excl;
__u64 rsv_rfer;
__u64 rsv_excl;
};
struct btrfs_qgroup_inherit {
__u64 flags;
__u64 num_qgroups;
__u64 num_ref_copies;
__u64 num_excl_copies;
struct btrfs_qgroup_limit lim;
__u64 qgroups[0];
};
struct btrfs_ioctl_qgroup_limit_args {
__u64 qgroupid;
struct btrfs_qgroup_limit lim;
};
#define BTRFS_SUBVOL_NAME_MAX 4039
struct btrfs_ioctl_vol_args_v2 {
__s64 fd;

1571
fs/btrfs/qgroup.c 100644
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File diff suppressed because it is too large Load Diff

2
fs/btrfs/transaction.c
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@ -351,6 +351,8 @@ again:
h->block_rsv = NULL;
h->orig_rsv = NULL;
h->aborted = 0;
h->delayed_ref_elem.seq = 0;
INIT_LIST_HEAD(&h->qgroup_ref_list);
smp_mb();
if (cur_trans->blocked && may_wait_transaction(root, type)) {

3
fs/btrfs/transaction.h
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@ -20,6 +20,7 @@
#define __BTRFS_TRANSACTION__
#include "btrfs_inode.h"
#include "delayed-ref.h"
#include "ctree.h"
struct btrfs_transaction {
u64 transid;
@ -63,6 +64,8 @@ struct btrfs_trans_handle {
* Subvolume quota depends on this
*/
struct btrfs_root *root;
struct seq_list delayed_ref_elem;
struct list_head qgroup_ref_list;
};
struct btrfs_pending_snapshot {